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* elf64-ppc.c (ppc64_elf_gc_mark_hook): Don't hang forever in loop.
[binutils.git] / bfd / elf64-ppc.c
blob501d4b7f87d119addd99217be6adbd23eaa1e8d5
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_header_size 8
71 #define elf_backend_can_gc_sections 1
72 #define elf_backend_can_refcount 1
73 #define elf_backend_rela_normal 1
74
75 #define bfd_elf64_mkobject ppc64_elf_mkobject
76 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
77 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
78 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
79 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
80 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
81 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
82
83 #define elf_backend_object_p ppc64_elf_object_p
84 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
85 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
86 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
87 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
88 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
89 #define elf_backend_check_directives ppc64_elf_check_directives
90 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
91 #define elf_backend_check_relocs ppc64_elf_check_relocs
92 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
93 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
94 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
95 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
96 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
97 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
98 #define elf_backend_action_discarded ppc64_elf_action_discarded
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 if (type >= (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])))
2123 {
2124 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2125 abfd, (int) type);
2126 type = R_PPC64_NONE;
2127 }
2128 cache_ptr->howto = ppc64_elf_howto_table[type];
2129 }
2130
2131 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2132
2133 static bfd_reloc_status_type
2134 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2135 void *data, asection *input_section,
2136 bfd *output_bfd, char **error_message)
2137 {
2138 /* If this is a relocatable link (output_bfd test tells us), just
2139 call the generic function. Any adjustment will be done at final
2140 link time. */
2141 if (output_bfd != NULL)
2142 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2143 input_section, output_bfd, error_message);
2144
2145 /* Adjust the addend for sign extension of the low 16 bits.
2146 We won't actually be using the low 16 bits, so trashing them
2147 doesn't matter. */
2148 reloc_entry->addend += 0x8000;
2149 return bfd_reloc_continue;
2150 }
2151
2152 static bfd_reloc_status_type
2153 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2154 void *data, asection *input_section,
2155 bfd *output_bfd, char **error_message)
2156 {
2157 if (output_bfd != NULL)
2158 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2159 input_section, output_bfd, error_message);
2160
2161 if (strcmp (symbol->section->name, ".opd") == 0
2162 && (symbol->section->owner->flags & DYNAMIC) == 0)
2163 {
2164 bfd_vma dest = opd_entry_value (symbol->section,
2165 symbol->value + reloc_entry->addend,
2166 NULL, NULL);
2167 if (dest != (bfd_vma) -1)
2168 reloc_entry->addend = dest - (symbol->value
2169 + symbol->section->output_section->vma
2170 + symbol->section->output_offset);
2171 }
2172 return bfd_reloc_continue;
2173 }
2174
2175 static bfd_reloc_status_type
2176 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2177 void *data, asection *input_section,
2178 bfd *output_bfd, char **error_message)
2179 {
2180 long insn;
2181 enum elf_ppc64_reloc_type r_type;
2182 bfd_size_type octets;
2183 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2184 bfd_boolean is_power4 = FALSE;
2185
2186 /* If this is a relocatable link (output_bfd test tells us), just
2187 call the generic function. Any adjustment will be done at final
2188 link time. */
2189 if (output_bfd != NULL)
2190 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2191 input_section, output_bfd, error_message);
2192
2193 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2194 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2195 insn &= ~(0x01 << 21);
2196 r_type = reloc_entry->howto->type;
2197 if (r_type == R_PPC64_ADDR14_BRTAKEN
2198 || r_type == R_PPC64_REL14_BRTAKEN)
2199 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2200
2201 if (is_power4)
2202 {
2203 /* Set 'a' bit. This is 0b00010 in BO field for branch
2204 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2205 for branch on CTR insns (BO == 1a00t or 1a01t). */
2206 if ((insn & (0x14 << 21)) == (0x04 << 21))
2207 insn |= 0x02 << 21;
2208 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2209 insn |= 0x08 << 21;
2210 else
2211 goto out;
2212 }
2213 else
2214 {
2215 bfd_vma target = 0;
2216 bfd_vma from;
2217
2218 if (!bfd_is_com_section (symbol->section))
2219 target = symbol->value;
2220 target += symbol->section->output_section->vma;
2221 target += symbol->section->output_offset;
2222 target += reloc_entry->addend;
2223
2224 from = (reloc_entry->address
2225 + input_section->output_offset
2226 + input_section->output_section->vma);
2227
2228 /* Invert 'y' bit if not the default. */
2229 if ((bfd_signed_vma) (target - from) < 0)
2230 insn ^= 0x01 << 21;
2231 }
2232 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2233 out:
2234 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2235 input_section, output_bfd, error_message);
2236 }
2237
2238 static bfd_reloc_status_type
2239 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2240 void *data, asection *input_section,
2241 bfd *output_bfd, char **error_message)
2242 {
2243 /* If this is a relocatable link (output_bfd test tells us), just
2244 call the generic function. Any adjustment will be done at final
2245 link time. */
2246 if (output_bfd != NULL)
2247 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2248 input_section, output_bfd, error_message);
2249
2250 /* Subtract the symbol section base address. */
2251 reloc_entry->addend -= symbol->section->output_section->vma;
2252 return bfd_reloc_continue;
2253 }
2254
2255 static bfd_reloc_status_type
2256 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2257 void *data, asection *input_section,
2258 bfd *output_bfd, char **error_message)
2259 {
2260 /* If this is a relocatable link (output_bfd test tells us), just
2261 call the generic function. Any adjustment will be done at final
2262 link time. */
2263 if (output_bfd != NULL)
2264 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2265 input_section, output_bfd, error_message);
2266
2267 /* Subtract the symbol section base address. */
2268 reloc_entry->addend -= symbol->section->output_section->vma;
2269
2270 /* Adjust the addend for sign extension of the low 16 bits. */
2271 reloc_entry->addend += 0x8000;
2272 return bfd_reloc_continue;
2273 }
2274
2275 static bfd_reloc_status_type
2276 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2277 void *data, asection *input_section,
2278 bfd *output_bfd, char **error_message)
2279 {
2280 bfd_vma TOCstart;
2281
2282 /* If this is a relocatable link (output_bfd test tells us), just
2283 call the generic function. Any adjustment will be done at final
2284 link time. */
2285 if (output_bfd != NULL)
2286 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2287 input_section, output_bfd, error_message);
2288
2289 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2290 if (TOCstart == 0)
2291 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2292
2293 /* Subtract the TOC base address. */
2294 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2295 return bfd_reloc_continue;
2296 }
2297
2298 static bfd_reloc_status_type
2299 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2300 void *data, asection *input_section,
2301 bfd *output_bfd, char **error_message)
2302 {
2303 bfd_vma TOCstart;
2304
2305 /* If this is a relocatable link (output_bfd test tells us), just
2306 call the generic function. Any adjustment will be done at final
2307 link time. */
2308 if (output_bfd != NULL)
2309 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2310 input_section, output_bfd, error_message);
2311
2312 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2313 if (TOCstart == 0)
2314 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2315
2316 /* Subtract the TOC base address. */
2317 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2318
2319 /* Adjust the addend for sign extension of the low 16 bits. */
2320 reloc_entry->addend += 0x8000;
2321 return bfd_reloc_continue;
2322 }
2323
2324 static bfd_reloc_status_type
2325 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2326 void *data, asection *input_section,
2327 bfd *output_bfd, char **error_message)
2328 {
2329 bfd_vma TOCstart;
2330 bfd_size_type octets;
2331
2332 /* If this is a relocatable link (output_bfd test tells us), just
2333 call the generic function. Any adjustment will be done at final
2334 link time. */
2335 if (output_bfd != NULL)
2336 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2337 input_section, output_bfd, error_message);
2338
2339 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2340 if (TOCstart == 0)
2341 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2342
2343 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2344 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2345 return bfd_reloc_ok;
2346 }
2347
2348 static bfd_reloc_status_type
2349 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2350 void *data, asection *input_section,
2351 bfd *output_bfd, char **error_message)
2352 {
2353 /* If this is a relocatable link (output_bfd test tells us), just
2354 call the generic function. Any adjustment will be done at final
2355 link time. */
2356 if (output_bfd != NULL)
2357 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2358 input_section, output_bfd, error_message);
2359
2360 if (error_message != NULL)
2361 {
2362 static char buf[60];
2363 sprintf (buf, "generic linker can't handle %s",
2364 reloc_entry->howto->name);
2365 *error_message = buf;
2366 }
2367 return bfd_reloc_dangerous;
2368 }
2369
2370 struct ppc64_elf_obj_tdata
2371 {
2372 struct elf_obj_tdata elf;
2373
2374 /* Shortcuts to dynamic linker sections. */
2375 asection *got;
2376 asection *relgot;
2377
2378 union {
2379 /* Used during garbage collection. We attach global symbols defined
2380 on removed .opd entries to this section so that the sym is removed. */
2381 asection *deleted_section;
2382
2383 /* Used when adding symbols. */
2384 bfd_boolean has_dotsym;
2385 } u;
2386
2387 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2388 sections means we potentially need one of these for each input bfd. */
2389 union {
2390 bfd_signed_vma refcount;
2391 bfd_vma offset;
2392 } tlsld_got;
2393
2394 /* A copy of relocs before they are modified for --emit-relocs. */
2395 Elf_Internal_Rela *opd_relocs;
2396 };
2397
2398 #define ppc64_elf_tdata(bfd) \
2399 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2400
2401 #define ppc64_tlsld_got(bfd) \
2402 (&ppc64_elf_tdata (bfd)->tlsld_got)
2403
2404 /* Override the generic function because we store some extras. */
2405
2406 static bfd_boolean
2407 ppc64_elf_mkobject (bfd *abfd)
2408 {
2409 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2410 abfd->tdata.any = bfd_zalloc (abfd, amt);
2411 if (abfd->tdata.any == NULL)
2412 return FALSE;
2413 return TRUE;
2414 }
2415
2416 /* Return 1 if target is one of ours. */
2417
2418 static bfd_boolean
2419 is_ppc64_elf_target (const struct bfd_target *targ)
2420 {
2421 extern const bfd_target bfd_elf64_powerpc_vec;
2422 extern const bfd_target bfd_elf64_powerpcle_vec;
2423
2424 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2425 }
2426
2427 /* Fix bad default arch selected for a 64 bit input bfd when the
2428 default is 32 bit. */
2429
2430 static bfd_boolean
2431 ppc64_elf_object_p (bfd *abfd)
2432 {
2433 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2434 {
2435 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2436
2437 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2438 {
2439 /* Relies on arch after 32 bit default being 64 bit default. */
2440 abfd->arch_info = abfd->arch_info->next;
2441 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2442 }
2443 }
2444 return TRUE;
2445 }
2446
2447 /* Support for core dump NOTE sections. */
2448
2449 static bfd_boolean
2450 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2451 {
2452 size_t offset, size;
2453
2454 if (note->descsz != 504)
2455 return FALSE;
2456
2457 /* pr_cursig */
2458 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2459
2460 /* pr_pid */
2461 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2462
2463 /* pr_reg */
2464 offset = 112;
2465 size = 384;
2466
2467 /* Make a ".reg/999" section. */
2468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2469 size, note->descpos + offset);
2470 }
2471
2472 static bfd_boolean
2473 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2474 {
2475 if (note->descsz != 136)
2476 return FALSE;
2477
2478 elf_tdata (abfd)->core_program
2479 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2480 elf_tdata (abfd)->core_command
2481 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2482
2483 return TRUE;
2484 }
2485
2486 /* Merge backend specific data from an object file to the output
2487 object file when linking. */
2488
2489 static bfd_boolean
2490 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2491 {
2492 /* Check if we have the same endianess. */
2493 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2494 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2495 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2496 {
2497 const char *msg;
2498
2499 if (bfd_big_endian (ibfd))
2500 msg = _("%B: compiled for a big endian system "
2501 "and target is little endian");
2502 else
2503 msg = _("%B: compiled for a little endian system "
2504 "and target is big endian");
2505
2506 (*_bfd_error_handler) (msg, ibfd);
2507
2508 bfd_set_error (bfd_error_wrong_format);
2509 return FALSE;
2510 }
2511
2512 return TRUE;
2513 }
2514
2515 /* Add extra PPC sections. */
2516
2517 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2518 {
2519 { ".plt", 4, 0, SHT_NOBITS, 0 },
2520 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2521 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2524 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2525 { NULL, 0, 0, 0, 0 }
2526 };
2527
2528 struct _ppc64_elf_section_data
2529 {
2530 struct bfd_elf_section_data elf;
2531
2532 /* An array with one entry for each opd function descriptor. */
2533 union
2534 {
2535 /* Points to the function code section for local opd entries. */
2536 asection **func_sec;
2537 /* After editing .opd, adjust references to opd local syms. */
2538 long *adjust;
2539 } opd;
2540
2541 /* An array for toc sections, indexed by offset/8.
2542 Specifies the relocation symbol index used at a given toc offset. */
2543 unsigned *t_symndx;
2544 };
2545
2546 #define ppc64_elf_section_data(sec) \
2547 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2548
2549 static bfd_boolean
2550 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2551 {
2552 struct _ppc64_elf_section_data *sdata;
2553 bfd_size_type amt = sizeof (*sdata);
2554
2555 sdata = bfd_zalloc (abfd, amt);
2556 if (sdata == NULL)
2557 return FALSE;
2558 sec->used_by_bfd = sdata;
2559
2560 return _bfd_elf_new_section_hook (abfd, sec);
2561 }
2562
2563 static void *
2564 get_opd_info (asection * sec)
2565 {
2566 if (sec != NULL
2567 && ppc64_elf_section_data (sec) != NULL
2568 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2569 return ppc64_elf_section_data (sec)->opd.adjust;
2570 return NULL;
2571 }
2572 \f
2573 /* Parameters for the qsort hook. */
2574 static asection *synthetic_opd;
2575 static bfd_boolean synthetic_relocatable;
2576
2577 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2578
2579 static int
2580 compare_symbols (const void *ap, const void *bp)
2581 {
2582 const asymbol *a = * (const asymbol **) ap;
2583 const asymbol *b = * (const asymbol **) bp;
2584
2585 /* Section symbols first. */
2586 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2587 return -1;
2588 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2589 return 1;
2590
2591 /* then .opd symbols. */
2592 if (a->section == synthetic_opd && b->section != synthetic_opd)
2593 return -1;
2594 if (a->section != synthetic_opd && b->section == synthetic_opd)
2595 return 1;
2596
2597 /* then other code symbols. */
2598 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2599 == (SEC_CODE | SEC_ALLOC)
2600 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2601 != (SEC_CODE | SEC_ALLOC))
2602 return -1;
2603
2604 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2605 != (SEC_CODE | SEC_ALLOC)
2606 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2607 == (SEC_CODE | SEC_ALLOC))
2608 return 1;
2609
2610 if (synthetic_relocatable)
2611 {
2612 if (a->section->id < b->section->id)
2613 return -1;
2614
2615 if (a->section->id > b->section->id)
2616 return 1;
2617 }
2618
2619 if (a->value + a->section->vma < b->value + b->section->vma)
2620 return -1;
2621
2622 if (a->value + a->section->vma > b->value + b->section->vma)
2623 return 1;
2624
2625 return 0;
2626 }
2627
2628 /* Search SYMS for a symbol of the given VALUE. */
2629
2630 static asymbol *
2631 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2632 {
2633 long mid;
2634
2635 if (id == -1)
2636 {
2637 while (lo < hi)
2638 {
2639 mid = (lo + hi) >> 1;
2640 if (syms[mid]->value + syms[mid]->section->vma < value)
2641 lo = mid + 1;
2642 else if (syms[mid]->value + syms[mid]->section->vma > value)
2643 hi = mid;
2644 else
2645 return syms[mid];
2646 }
2647 }
2648 else
2649 {
2650 while (lo < hi)
2651 {
2652 mid = (lo + hi) >> 1;
2653 if (syms[mid]->section->id < id)
2654 lo = mid + 1;
2655 else if (syms[mid]->section->id > id)
2656 hi = mid;
2657 else if (syms[mid]->value < value)
2658 lo = mid + 1;
2659 else if (syms[mid]->value > value)
2660 hi = mid;
2661 else
2662 return syms[mid];
2663 }
2664 }
2665 return NULL;
2666 }
2667
2668 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2669 entry syms. */
2670
2671 static long
2672 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2673 long static_count, asymbol **static_syms,
2674 long dyn_count, asymbol **dyn_syms,
2675 asymbol **ret)
2676 {
2677 asymbol *s;
2678 long i;
2679 long count;
2680 char *names;
2681 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2682 asection *opd;
2683 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2684 asymbol **syms;
2685
2686 *ret = NULL;
2687
2688 opd = bfd_get_section_by_name (abfd, ".opd");
2689 if (opd == NULL)
2690 return 0;
2691
2692 symcount = static_count;
2693 if (!relocatable)
2694 symcount += dyn_count;
2695 if (symcount == 0)
2696 return 0;
2697
2698 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2699 if (syms == NULL)
2700 return -1;
2701
2702 if (!relocatable && static_count != 0 && dyn_count != 0)
2703 {
2704 /* Use both symbol tables. */
2705 memcpy (syms, static_syms, static_count * sizeof (*syms));
2706 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2707 }
2708 else if (!relocatable && static_count == 0)
2709 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2710 else
2711 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2712
2713 synthetic_opd = opd;
2714 synthetic_relocatable = relocatable;
2715 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2716
2717 if (!relocatable && symcount > 1)
2718 {
2719 long j;
2720 /* Trim duplicate syms, since we may have merged the normal and
2721 dynamic symbols. Actually, we only care about syms that have
2722 different values, so trim any with the same value. */
2723 for (i = 1, j = 1; i < symcount; ++i)
2724 if (syms[i - 1]->value + syms[i - 1]->section->vma
2725 != syms[i]->value + syms[i]->section->vma)
2726 syms[j++] = syms[i];
2727 symcount = j;
2728 }
2729
2730 i = 0;
2731 if (syms[i]->section == opd)
2732 ++i;
2733 codesecsym = i;
2734
2735 for (; i < symcount; ++i)
2736 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2737 != (SEC_CODE | SEC_ALLOC))
2738 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2739 break;
2740 codesecsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2744 break;
2745 secsymend = i;
2746
2747 for (; i < symcount; ++i)
2748 if (syms[i]->section != opd)
2749 break;
2750 opdsymend = i;
2751
2752 for (; i < symcount; ++i)
2753 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2754 != (SEC_CODE | SEC_ALLOC))
2755 break;
2756 symcount = i;
2757
2758 count = 0;
2759 if (opdsymend == secsymend)
2760 goto done;
2761
2762 if (relocatable)
2763 {
2764 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2765 arelent *r;
2766 size_t size;
2767 long relcount;
2768
2769 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2770 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2771 if (relcount == 0)
2772 goto done;
2773
2774 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2775 {
2776 count = -1;
2777 goto done;
2778 }
2779
2780 size = 0;
2781 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2782 {
2783 asymbol *sym;
2784
2785 while (r < opd->relocation + relcount
2786 && r->address < syms[i]->value + opd->vma)
2787 ++r;
2788
2789 if (r == opd->relocation + relcount)
2790 break;
2791
2792 if (r->address != syms[i]->value + opd->vma)
2793 continue;
2794
2795 if (r->howto->type != R_PPC64_ADDR64)
2796 continue;
2797
2798 sym = *r->sym_ptr_ptr;
2799 if (!sym_exists_at (syms, opdsymend, symcount,
2800 sym->section->id, sym->value + r->addend))
2801 {
2802 ++count;
2803 size += sizeof (asymbol);
2804 size += strlen (syms[i]->name) + 2;
2805 }
2806 }
2807
2808 s = *ret = bfd_malloc (size);
2809 if (s == NULL)
2810 {
2811 count = -1;
2812 goto done;
2813 }
2814
2815 names = (char *) (s + count);
2816
2817 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2818 {
2819 asymbol *sym;
2820
2821 while (r < opd->relocation + relcount
2822 && r->address < syms[i]->value + opd->vma)
2823 ++r;
2824
2825 if (r == opd->relocation + relcount)
2826 break;
2827
2828 if (r->address != syms[i]->value + opd->vma)
2829 continue;
2830
2831 if (r->howto->type != R_PPC64_ADDR64)
2832 continue;
2833
2834 sym = *r->sym_ptr_ptr;
2835 if (!sym_exists_at (syms, opdsymend, symcount,
2836 sym->section->id, sym->value + r->addend))
2837 {
2838 size_t len;
2839
2840 *s = *syms[i];
2841 s->section = sym->section;
2842 s->value = sym->value + r->addend;
2843 s->name = names;
2844 *names++ = '.';
2845 len = strlen (syms[i]->name);
2846 memcpy (names, syms[i]->name, len + 1);
2847 names += len + 1;
2848 s++;
2849 }
2850 }
2851 }
2852 else
2853 {
2854 bfd_byte *contents;
2855 size_t size;
2856
2857 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2858 {
2859 if (contents)
2860 {
2861 free_contents_and_exit:
2862 free (contents);
2863 }
2864 count = -1;
2865 goto done;
2866 }
2867
2868 size = 0;
2869 for (i = secsymend; i < opdsymend; ++i)
2870 {
2871 bfd_vma ent;
2872
2873 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2874 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2875 {
2876 ++count;
2877 size += sizeof (asymbol);
2878 size += strlen (syms[i]->name) + 2;
2879 }
2880 }
2881
2882 s = *ret = bfd_malloc (size);
2883 if (s == NULL)
2884 goto free_contents_and_exit;
2885
2886 names = (char *) (s + count);
2887
2888 for (i = secsymend; i < opdsymend; ++i)
2889 {
2890 bfd_vma ent;
2891
2892 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2893 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2894 {
2895 long lo, hi;
2896 size_t len;
2897 asection *sec = abfd->sections;
2898
2899 *s = *syms[i];
2900 lo = codesecsym;
2901 hi = codesecsymend;
2902 while (lo < hi)
2903 {
2904 long mid = (lo + hi) >> 1;
2905 if (syms[mid]->section->vma < ent)
2906 lo = mid + 1;
2907 else if (syms[mid]->section->vma > ent)
2908 hi = mid;
2909 else
2910 {
2911 sec = syms[mid]->section;
2912 break;
2913 }
2914 }
2915
2916 if (lo >= hi && lo > codesecsym)
2917 sec = syms[lo - 1]->section;
2918
2919 for (; sec != NULL; sec = sec->next)
2920 {
2921 if (sec->vma > ent)
2922 break;
2923 if ((sec->flags & SEC_ALLOC) == 0
2924 || (sec->flags & SEC_LOAD) == 0)
2925 break;
2926 if ((sec->flags & SEC_CODE) != 0)
2927 s->section = sec;
2928 }
2929 s->value = ent - s->section->vma;
2930 s->name = names;
2931 *names++ = '.';
2932 len = strlen (syms[i]->name);
2933 memcpy (names, syms[i]->name, len + 1);
2934 names += len + 1;
2935 s++;
2936 }
2937 }
2938 free (contents);
2939 }
2940
2941 done:
2942 free (syms);
2943 return count;
2944 }
2945 \f
2946 /* The following functions are specific to the ELF linker, while
2947 functions above are used generally. Those named ppc64_elf_* are
2948 called by the main ELF linker code. They appear in this file more
2949 or less in the order in which they are called. eg.
2950 ppc64_elf_check_relocs is called early in the link process,
2951 ppc64_elf_finish_dynamic_sections is one of the last functions
2952 called.
2953
2954 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2955 functions have both a function code symbol and a function descriptor
2956 symbol. A call to foo in a relocatable object file looks like:
2957
2958 . .text
2959 . x:
2960 . bl .foo
2961 . nop
2962
2963 The function definition in another object file might be:
2964
2965 . .section .opd
2966 . foo: .quad .foo
2967 . .quad .TOC.@tocbase
2968 . .quad 0
2969 .
2970 . .text
2971 . .foo: blr
2972
2973 When the linker resolves the call during a static link, the branch
2974 unsurprisingly just goes to .foo and the .opd information is unused.
2975 If the function definition is in a shared library, things are a little
2976 different: The call goes via a plt call stub, the opd information gets
2977 copied to the plt, and the linker patches the nop.
2978
2979 . x:
2980 . bl .foo_stub
2981 . ld 2,40(1)
2982 .
2983 .
2984 . .foo_stub:
2985 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2986 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2987 . std 2,40(1) # this is the general idea
2988 . ld 11,0(12)
2989 . ld 2,8(12)
2990 . mtctr 11
2991 . ld 11,16(12)
2992 . bctr
2993 .
2994 . .section .plt
2995 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2996
2997 The "reloc ()" notation is supposed to indicate that the linker emits
2998 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2999 copying.
3000
3001 What are the difficulties here? Well, firstly, the relocations
3002 examined by the linker in check_relocs are against the function code
3003 sym .foo, while the dynamic relocation in the plt is emitted against
3004 the function descriptor symbol, foo. Somewhere along the line, we need
3005 to carefully copy dynamic link information from one symbol to the other.
3006 Secondly, the generic part of the elf linker will make .foo a dynamic
3007 symbol as is normal for most other backends. We need foo dynamic
3008 instead, at least for an application final link. However, when
3009 creating a shared library containing foo, we need to have both symbols
3010 dynamic so that references to .foo are satisfied during the early
3011 stages of linking. Otherwise the linker might decide to pull in a
3012 definition from some other object, eg. a static library.
3013
3014 Update: As of August 2004, we support a new convention. Function
3015 calls may use the function descriptor symbol, ie. "bl foo". This
3016 behaves exactly as "bl .foo". */
3017
3018 /* The linker needs to keep track of the number of relocs that it
3019 decides to copy as dynamic relocs in check_relocs for each symbol.
3020 This is so that it can later discard them if they are found to be
3021 unnecessary. We store the information in a field extending the
3022 regular ELF linker hash table. */
3023
3024 struct ppc_dyn_relocs
3025 {
3026 struct ppc_dyn_relocs *next;
3027
3028 /* The input section of the reloc. */
3029 asection *sec;
3030
3031 /* Total number of relocs copied for the input section. */
3032 bfd_size_type count;
3033
3034 /* Number of pc-relative relocs copied for the input section. */
3035 bfd_size_type pc_count;
3036 };
3037
3038 /* Track GOT entries needed for a given symbol. We might need more
3039 than one got entry per symbol. */
3040 struct got_entry
3041 {
3042 struct got_entry *next;
3043
3044 /* The symbol addend that we'll be placing in the GOT. */
3045 bfd_vma addend;
3046
3047 /* Unlike other ELF targets, we use separate GOT entries for the same
3048 symbol referenced from different input files. This is to support
3049 automatic multiple TOC/GOT sections, where the TOC base can vary
3050 from one input file to another.
3051
3052 Point to the BFD owning this GOT entry. */
3053 bfd *owner;
3054
3055 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3056 TLS_TPREL or TLS_DTPREL for tls entries. */
3057 char tls_type;
3058
3059 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3060 union
3061 {
3062 bfd_signed_vma refcount;
3063 bfd_vma offset;
3064 } got;
3065 };
3066
3067 /* The same for PLT. */
3068 struct plt_entry
3069 {
3070 struct plt_entry *next;
3071
3072 bfd_vma addend;
3073
3074 union
3075 {
3076 bfd_signed_vma refcount;
3077 bfd_vma offset;
3078 } plt;
3079 };
3080
3081 /* Of those relocs that might be copied as dynamic relocs, this macro
3082 selects those that must be copied when linking a shared library,
3083 even when the symbol is local. */
3084
3085 #define MUST_BE_DYN_RELOC(RTYPE) \
3086 ((RTYPE) != R_PPC64_REL32 \
3087 && (RTYPE) != R_PPC64_REL64 \
3088 && (RTYPE) != R_PPC64_REL30)
3089
3090 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3091 copying dynamic variables from a shared lib into an app's dynbss
3092 section, and instead use a dynamic relocation to point into the
3093 shared lib. With code that gcc generates, it's vital that this be
3094 enabled; In the PowerPC64 ABI, the address of a function is actually
3095 the address of a function descriptor, which resides in the .opd
3096 section. gcc uses the descriptor directly rather than going via the
3097 GOT as some other ABI's do, which means that initialized function
3098 pointers must reference the descriptor. Thus, a function pointer
3099 initialized to the address of a function in a shared library will
3100 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3101 redefines the function descriptor symbol to point to the copy. This
3102 presents a problem as a plt entry for that function is also
3103 initialized from the function descriptor symbol and the copy reloc
3104 may not be initialized first. */
3105 #define ELIMINATE_COPY_RELOCS 1
3106
3107 /* Section name for stubs is the associated section name plus this
3108 string. */
3109 #define STUB_SUFFIX ".stub"
3110
3111 /* Linker stubs.
3112 ppc_stub_long_branch:
3113 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3114 destination, but a 24 bit branch in a stub section will reach.
3115 . b dest
3116
3117 ppc_stub_plt_branch:
3118 Similar to the above, but a 24 bit branch in the stub section won't
3119 reach its destination.
3120 . addis %r12,%r2,xxx@toc@ha
3121 . ld %r11,xxx@toc@l(%r12)
3122 . mtctr %r11
3123 . bctr
3124
3125 ppc_stub_plt_call:
3126 Used to call a function in a shared library. If it so happens that
3127 the plt entry referenced crosses a 64k boundary, then an extra
3128 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3129 xxx+16 as appropriate.
3130 . addis %r12,%r2,xxx@toc@ha
3131 . std %r2,40(%r1)
3132 . ld %r11,xxx+0@toc@l(%r12)
3133 . ld %r2,xxx+8@toc@l(%r12)
3134 . mtctr %r11
3135 . ld %r11,xxx+16@toc@l(%r12)
3136 . bctr
3137
3138 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3139 code to adjust the value and save r2 to support multiple toc sections.
3140 A ppc_stub_long_branch with an r2 offset looks like:
3141 . std %r2,40(%r1)
3142 . addis %r2,%r2,off@ha
3143 . addi %r2,%r2,off@l
3144 . b dest
3145
3146 A ppc_stub_plt_branch with an r2 offset looks like:
3147 . std %r2,40(%r1)
3148 . addis %r12,%r2,xxx@toc@ha
3149 . ld %r11,xxx@toc@l(%r12)
3150 . addis %r2,%r2,off@ha
3151 . addi %r2,%r2,off@l
3152 . mtctr %r11
3153 . bctr
3154 */
3155
3156 enum ppc_stub_type {
3157 ppc_stub_none,
3158 ppc_stub_long_branch,
3159 ppc_stub_long_branch_r2off,
3160 ppc_stub_plt_branch,
3161 ppc_stub_plt_branch_r2off,
3162 ppc_stub_plt_call
3163 };
3164
3165 struct ppc_stub_hash_entry {
3166
3167 /* Base hash table entry structure. */
3168 struct bfd_hash_entry root;
3169
3170 enum ppc_stub_type stub_type;
3171
3172 /* The stub section. */
3173 asection *stub_sec;
3174
3175 /* Offset within stub_sec of the beginning of this stub. */
3176 bfd_vma stub_offset;
3177
3178 /* Given the symbol's value and its section we can determine its final
3179 value when building the stubs (so the stub knows where to jump. */
3180 bfd_vma target_value;
3181 asection *target_section;
3182
3183 /* The symbol table entry, if any, that this was derived from. */
3184 struct ppc_link_hash_entry *h;
3185
3186 /* And the reloc addend that this was derived from. */
3187 bfd_vma addend;
3188
3189 /* Where this stub is being called from, or, in the case of combined
3190 stub sections, the first input section in the group. */
3191 asection *id_sec;
3192 };
3193
3194 struct ppc_branch_hash_entry {
3195
3196 /* Base hash table entry structure. */
3197 struct bfd_hash_entry root;
3198
3199 /* Offset within branch lookup table. */
3200 unsigned int offset;
3201
3202 /* Generation marker. */
3203 unsigned int iter;
3204 };
3205
3206 struct ppc_link_hash_entry
3207 {
3208 struct elf_link_hash_entry elf;
3209
3210 /* A pointer to the most recently used stub hash entry against this
3211 symbol. */
3212 struct ppc_stub_hash_entry *stub_cache;
3213
3214 /* Track dynamic relocs copied for this symbol. */
3215 struct ppc_dyn_relocs *dyn_relocs;
3216
3217 /* Link between function code and descriptor symbols. */
3218 struct ppc_link_hash_entry *oh;
3219
3220 /* Flag function code and descriptor symbols. */
3221 unsigned int is_func:1;
3222 unsigned int is_func_descriptor:1;
3223 unsigned int fake:1;
3224
3225 /* Whether global opd/toc sym has been adjusted or not.
3226 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3227 should be set for all globals defined in any opd/toc section. */
3228 unsigned int adjust_done:1;
3229
3230 /* Set if we twiddled this symbol to weak at some stage. */
3231 unsigned int was_undefined:1;
3232
3233 /* Contexts in which symbol is used in the GOT (or TOC).
3234 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3235 corresponding relocs are encountered during check_relocs.
3236 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3237 indicate the corresponding GOT entry type is not needed.
3238 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3239 a TPREL one. We use a separate flag rather than setting TPREL
3240 just for convenience in distinguishing the two cases. */
3241 #define TLS_GD 1 /* GD reloc. */
3242 #define TLS_LD 2 /* LD reloc. */
3243 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3244 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3245 #define TLS_TLS 16 /* Any TLS reloc. */
3246 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3247 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3248 char tls_mask;
3249 };
3250
3251 /* ppc64 ELF linker hash table. */
3252
3253 struct ppc_link_hash_table
3254 {
3255 struct elf_link_hash_table elf;
3256
3257 /* The stub hash table. */
3258 struct bfd_hash_table stub_hash_table;
3259
3260 /* Another hash table for plt_branch stubs. */
3261 struct bfd_hash_table branch_hash_table;
3262
3263 /* Linker stub bfd. */
3264 bfd *stub_bfd;
3265
3266 /* Linker call-backs. */
3267 asection * (*add_stub_section) (const char *, asection *);
3268 void (*layout_sections_again) (void);
3269
3270 /* Array to keep track of which stub sections have been created, and
3271 information on stub grouping. */
3272 struct map_stub {
3273 /* This is the section to which stubs in the group will be attached. */
3274 asection *link_sec;
3275 /* The stub section. */
3276 asection *stub_sec;
3277 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3278 bfd_vma toc_off;
3279 } *stub_group;
3280
3281 /* Temp used when calculating TOC pointers. */
3282 bfd_vma toc_curr;
3283
3284 /* Highest input section id. */
3285 int top_id;
3286
3287 /* Highest output section index. */
3288 int top_index;
3289
3290 /* List of input sections for each output section. */
3291 asection **input_list;
3292
3293 /* Short-cuts to get to dynamic linker sections. */
3294 asection *got;
3295 asection *plt;
3296 asection *relplt;
3297 asection *dynbss;
3298 asection *relbss;
3299 asection *glink;
3300 asection *sfpr;
3301 asection *brlt;
3302 asection *relbrlt;
3303
3304 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3305 struct ppc_link_hash_entry *tls_get_addr;
3306 struct ppc_link_hash_entry *tls_get_addr_fd;
3307
3308 /* Statistics. */
3309 unsigned long stub_count[ppc_stub_plt_call];
3310
3311 /* Number of stubs against global syms. */
3312 unsigned long stub_globals;
3313
3314 /* Set if we should emit symbols for stubs. */
3315 unsigned int emit_stub_syms:1;
3316
3317 /* Support for multiple toc sections. */
3318 unsigned int no_multi_toc:1;
3319 unsigned int multi_toc_needed:1;
3320
3321 /* Set on error. */
3322 unsigned int stub_error:1;
3323
3324 /* Flag set when small branches are detected. Used to
3325 select suitable defaults for the stub group size. */
3326 unsigned int has_14bit_branch:1;
3327
3328 /* Temp used by ppc64_elf_check_directives. */
3329 unsigned int twiddled_syms:1;
3330
3331 /* Incremented every time we size stubs. */
3332 unsigned int stub_iteration;
3333
3334 /* Small local sym to section mapping cache. */
3335 struct sym_sec_cache sym_sec;
3336 };
3337
3338 /* Rename some of the generic section flags to better document how they
3339 are used here. */
3340 #define has_toc_reloc has_gp_reloc
3341 #define makes_toc_func_call need_finalize_relax
3342 #define call_check_in_progress reloc_done
3343
3344 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3345
3346 #define ppc_hash_table(p) \
3347 ((struct ppc_link_hash_table *) ((p)->hash))
3348
3349 #define ppc_stub_hash_lookup(table, string, create, copy) \
3350 ((struct ppc_stub_hash_entry *) \
3351 bfd_hash_lookup ((table), (string), (create), (copy)))
3352
3353 #define ppc_branch_hash_lookup(table, string, create, copy) \
3354 ((struct ppc_branch_hash_entry *) \
3355 bfd_hash_lookup ((table), (string), (create), (copy)))
3356
3357 /* Create an entry in the stub hash table. */
3358
3359 static struct bfd_hash_entry *
3360 stub_hash_newfunc (struct bfd_hash_entry *entry,
3361 struct bfd_hash_table *table,
3362 const char *string)
3363 {
3364 /* Allocate the structure if it has not already been allocated by a
3365 subclass. */
3366 if (entry == NULL)
3367 {
3368 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3369 if (entry == NULL)
3370 return entry;
3371 }
3372
3373 /* Call the allocation method of the superclass. */
3374 entry = bfd_hash_newfunc (entry, table, string);
3375 if (entry != NULL)
3376 {
3377 struct ppc_stub_hash_entry *eh;
3378
3379 /* Initialize the local fields. */
3380 eh = (struct ppc_stub_hash_entry *) entry;
3381 eh->stub_type = ppc_stub_none;
3382 eh->stub_sec = NULL;
3383 eh->stub_offset = 0;
3384 eh->target_value = 0;
3385 eh->target_section = NULL;
3386 eh->h = NULL;
3387 eh->id_sec = NULL;
3388 }
3389
3390 return entry;
3391 }
3392
3393 /* Create an entry in the branch hash table. */
3394
3395 static struct bfd_hash_entry *
3396 branch_hash_newfunc (struct bfd_hash_entry *entry,
3397 struct bfd_hash_table *table,
3398 const char *string)
3399 {
3400 /* Allocate the structure if it has not already been allocated by a
3401 subclass. */
3402 if (entry == NULL)
3403 {
3404 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3405 if (entry == NULL)
3406 return entry;
3407 }
3408
3409 /* Call the allocation method of the superclass. */
3410 entry = bfd_hash_newfunc (entry, table, string);
3411 if (entry != NULL)
3412 {
3413 struct ppc_branch_hash_entry *eh;
3414
3415 /* Initialize the local fields. */
3416 eh = (struct ppc_branch_hash_entry *) entry;
3417 eh->offset = 0;
3418 eh->iter = 0;
3419 }
3420
3421 return entry;
3422 }
3423
3424 /* Create an entry in a ppc64 ELF linker hash table. */
3425
3426 static struct bfd_hash_entry *
3427 link_hash_newfunc (struct bfd_hash_entry *entry,
3428 struct bfd_hash_table *table,
3429 const char *string)
3430 {
3431 /* Allocate the structure if it has not already been allocated by a
3432 subclass. */
3433 if (entry == NULL)
3434 {
3435 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3436 if (entry == NULL)
3437 return entry;
3438 }
3439
3440 /* Call the allocation method of the superclass. */
3441 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3442 if (entry != NULL)
3443 {
3444 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3445
3446 memset (&eh->stub_cache, 0,
3447 (sizeof (struct ppc_link_hash_entry)
3448 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3449 }
3450
3451 return entry;
3452 }
3453
3454 /* Create a ppc64 ELF linker hash table. */
3455
3456 static struct bfd_link_hash_table *
3457 ppc64_elf_link_hash_table_create (bfd *abfd)
3458 {
3459 struct ppc_link_hash_table *htab;
3460 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3461
3462 htab = bfd_zmalloc (amt);
3463 if (htab == NULL)
3464 return NULL;
3465
3466 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3467 {
3468 free (htab);
3469 return NULL;
3470 }
3471
3472 /* Init the stub hash table too. */
3473 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3474 return NULL;
3475
3476 /* And the branch hash table. */
3477 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3478 return NULL;
3479
3480 /* Initializing two fields of the union is just cosmetic. We really
3481 only care about glist, but when compiled on a 32-bit host the
3482 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3483 debugger inspection of these fields look nicer. */
3484 htab->elf.init_got_refcount.refcount = 0;
3485 htab->elf.init_got_refcount.glist = NULL;
3486 htab->elf.init_plt_refcount.refcount = 0;
3487 htab->elf.init_plt_refcount.glist = NULL;
3488 htab->elf.init_got_offset.offset = 0;
3489 htab->elf.init_got_offset.glist = NULL;
3490 htab->elf.init_plt_offset.offset = 0;
3491 htab->elf.init_plt_offset.glist = NULL;
3492
3493 return &htab->elf.root;
3494 }
3495
3496 /* Free the derived linker hash table. */
3497
3498 static void
3499 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3500 {
3501 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3502
3503 bfd_hash_table_free (&ret->stub_hash_table);
3504 bfd_hash_table_free (&ret->branch_hash_table);
3505 _bfd_generic_link_hash_table_free (hash);
3506 }
3507
3508 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3509
3510 void
3511 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3512 {
3513 struct ppc_link_hash_table *htab;
3514
3515 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3516
3517 /* Always hook our dynamic sections into the first bfd, which is the
3518 linker created stub bfd. This ensures that the GOT header is at
3519 the start of the output TOC section. */
3520 htab = ppc_hash_table (info);
3521 htab->stub_bfd = abfd;
3522 htab->elf.dynobj = abfd;
3523 }
3524
3525 /* Build a name for an entry in the stub hash table. */
3526
3527 static char *
3528 ppc_stub_name (const asection *input_section,
3529 const asection *sym_sec,
3530 const struct ppc_link_hash_entry *h,
3531 const Elf_Internal_Rela *rel)
3532 {
3533 char *stub_name;
3534 bfd_size_type len;
3535
3536 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3537 offsets from a sym as a branch target? In fact, we could
3538 probably assume the addend is always zero. */
3539 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3540
3541 if (h)
3542 {
3543 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3544 stub_name = bfd_malloc (len);
3545 if (stub_name == NULL)
3546 return stub_name;
3547
3548 sprintf (stub_name, "%08x.%s+%x",
3549 input_section->id & 0xffffffff,
3550 h->elf.root.root.string,
3551 (int) rel->r_addend & 0xffffffff);
3552 }
3553 else
3554 {
3555 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3556 stub_name = bfd_malloc (len);
3557 if (stub_name == NULL)
3558 return stub_name;
3559
3560 sprintf (stub_name, "%08x.%x:%x+%x",
3561 input_section->id & 0xffffffff,
3562 sym_sec->id & 0xffffffff,
3563 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3564 (int) rel->r_addend & 0xffffffff);
3565 }
3566 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3567 stub_name[len - 2] = 0;
3568 return stub_name;
3569 }
3570
3571 /* Look up an entry in the stub hash. Stub entries are cached because
3572 creating the stub name takes a bit of time. */
3573
3574 static struct ppc_stub_hash_entry *
3575 ppc_get_stub_entry (const asection *input_section,
3576 const asection *sym_sec,
3577 struct ppc_link_hash_entry *h,
3578 const Elf_Internal_Rela *rel,
3579 struct ppc_link_hash_table *htab)
3580 {
3581 struct ppc_stub_hash_entry *stub_entry;
3582 const asection *id_sec;
3583
3584 /* If this input section is part of a group of sections sharing one
3585 stub section, then use the id of the first section in the group.
3586 Stub names need to include a section id, as there may well be
3587 more than one stub used to reach say, printf, and we need to
3588 distinguish between them. */
3589 id_sec = htab->stub_group[input_section->id].link_sec;
3590
3591 if (h != NULL && h->stub_cache != NULL
3592 && h->stub_cache->h == h
3593 && h->stub_cache->id_sec == id_sec)
3594 {
3595 stub_entry = h->stub_cache;
3596 }
3597 else
3598 {
3599 char *stub_name;
3600
3601 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3602 if (stub_name == NULL)
3603 return NULL;
3604
3605 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3606 stub_name, FALSE, FALSE);
3607 if (h != NULL)
3608 h->stub_cache = stub_entry;
3609
3610 free (stub_name);
3611 }
3612
3613 return stub_entry;
3614 }
3615
3616 /* Add a new stub entry to the stub hash. Not all fields of the new
3617 stub entry are initialised. */
3618
3619 static struct ppc_stub_hash_entry *
3620 ppc_add_stub (const char *stub_name,
3621 asection *section,
3622 struct ppc_link_hash_table *htab)
3623 {
3624 asection *link_sec;
3625 asection *stub_sec;
3626 struct ppc_stub_hash_entry *stub_entry;
3627
3628 link_sec = htab->stub_group[section->id].link_sec;
3629 stub_sec = htab->stub_group[section->id].stub_sec;
3630 if (stub_sec == NULL)
3631 {
3632 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3633 if (stub_sec == NULL)
3634 {
3635 size_t namelen;
3636 bfd_size_type len;
3637 char *s_name;
3638
3639 namelen = strlen (link_sec->name);
3640 len = namelen + sizeof (STUB_SUFFIX);
3641 s_name = bfd_alloc (htab->stub_bfd, len);
3642 if (s_name == NULL)
3643 return NULL;
3644
3645 memcpy (s_name, link_sec->name, namelen);
3646 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3647 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3648 if (stub_sec == NULL)
3649 return NULL;
3650 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3651 }
3652 htab->stub_group[section->id].stub_sec = stub_sec;
3653 }
3654
3655 /* Enter this entry into the linker stub hash table. */
3656 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3657 TRUE, FALSE);
3658 if (stub_entry == NULL)
3659 {
3660 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3661 section->owner, stub_name);
3662 return NULL;
3663 }
3664
3665 stub_entry->stub_sec = stub_sec;
3666 stub_entry->stub_offset = 0;
3667 stub_entry->id_sec = link_sec;
3668 return stub_entry;
3669 }
3670
3671 /* Create sections for linker generated code. */
3672
3673 static bfd_boolean
3674 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3675 {
3676 struct ppc_link_hash_table *htab;
3677 flagword flags;
3678
3679 htab = ppc_hash_table (info);
3680
3681 /* Create .sfpr for code to save and restore fp regs. */
3682 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3683 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3684 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3685 flags);
3686 if (htab->sfpr == NULL
3687 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3688 return FALSE;
3689
3690 /* Create .glink for lazy dynamic linking support. */
3691 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3692 flags);
3693 if (htab->glink == NULL
3694 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3695 return FALSE;
3696
3697 /* Create branch lookup table for plt_branch stubs. */
3698 if (info->shared)
3699 {
3700 flags = (SEC_ALLOC | SEC_LOAD
3701 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3702 htab->brlt
3703 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3704 flags);
3705 }
3706 else
3707 {
3708 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3709 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3710 htab->brlt
3711 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3712 }
3713
3714 if (htab->brlt == NULL
3715 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3716 return FALSE;
3717
3718 if (info->shared)
3719 {
3720 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3721 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3722 htab->relbrlt
3723 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3724 flags);
3725 }
3726 else if (info->emitrelocations)
3727 {
3728 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3729 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3730 htab->relbrlt
3731 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3732 flags);
3733 }
3734 else
3735 return TRUE;
3736
3737 if (!htab->relbrlt
3738 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3739 return FALSE;
3740
3741 return TRUE;
3742 }
3743
3744 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3745 not already done. */
3746
3747 static bfd_boolean
3748 create_got_section (bfd *abfd, struct bfd_link_info *info)
3749 {
3750 asection *got, *relgot;
3751 flagword flags;
3752 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3753
3754 if (!htab->got)
3755 {
3756 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3757 return FALSE;
3758
3759 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3760 if (!htab->got)
3761 abort ();
3762 }
3763
3764 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3765 | SEC_LINKER_CREATED);
3766
3767 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3768 if (!got
3769 || !bfd_set_section_alignment (abfd, got, 3))
3770 return FALSE;
3771
3772 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3773 flags | SEC_READONLY);
3774 if (!relgot
3775 || ! bfd_set_section_alignment (abfd, relgot, 3))
3776 return FALSE;
3777
3778 ppc64_elf_tdata (abfd)->got = got;
3779 ppc64_elf_tdata (abfd)->relgot = relgot;
3780 return TRUE;
3781 }
3782
3783 /* Create the dynamic sections, and set up shortcuts. */
3784
3785 static bfd_boolean
3786 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3787 {
3788 struct ppc_link_hash_table *htab;
3789
3790 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3791 return FALSE;
3792
3793 htab = ppc_hash_table (info);
3794 if (!htab->got)
3795 htab->got = bfd_get_section_by_name (dynobj, ".got");
3796 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3797 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3798 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3799 if (!info->shared)
3800 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3801
3802 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3803 || (!info->shared && !htab->relbss))
3804 abort ();
3805
3806 return TRUE;
3807 }
3808
3809 /* Merge PLT info on FROM with that on TO. */
3810
3811 static void
3812 move_plt_plist (struct ppc_link_hash_entry *from,
3813 struct ppc_link_hash_entry *to)
3814 {
3815 if (from->elf.plt.plist != NULL)
3816 {
3817 if (to->elf.plt.plist != NULL)
3818 {
3819 struct plt_entry **entp;
3820 struct plt_entry *ent;
3821
3822 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3823 {
3824 struct plt_entry *dent;
3825
3826 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3827 if (dent->addend == ent->addend)
3828 {
3829 dent->plt.refcount += ent->plt.refcount;
3830 *entp = ent->next;
3831 break;
3832 }
3833 if (dent == NULL)
3834 entp = &ent->next;
3835 }
3836 *entp = to->elf.plt.plist;
3837 }
3838
3839 to->elf.plt.plist = from->elf.plt.plist;
3840 from->elf.plt.plist = NULL;
3841 }
3842 }
3843
3844 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3845
3846 static void
3847 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3848 struct elf_link_hash_entry *dir,
3849 struct elf_link_hash_entry *ind)
3850 {
3851 struct ppc_link_hash_entry *edir, *eind;
3852
3853 edir = (struct ppc_link_hash_entry *) dir;
3854 eind = (struct ppc_link_hash_entry *) ind;
3855
3856 /* Copy over any dynamic relocs we may have on the indirect sym. */
3857 if (eind->dyn_relocs != NULL)
3858 {
3859 if (edir->dyn_relocs != NULL)
3860 {
3861 struct ppc_dyn_relocs **pp;
3862 struct ppc_dyn_relocs *p;
3863
3864 /* Add reloc counts against the indirect sym to the direct sym
3865 list. Merge any entries against the same section. */
3866 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3867 {
3868 struct ppc_dyn_relocs *q;
3869
3870 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3871 if (q->sec == p->sec)
3872 {
3873 q->pc_count += p->pc_count;
3874 q->count += p->count;
3875 *pp = p->next;
3876 break;
3877 }
3878 if (q == NULL)
3879 pp = &p->next;
3880 }
3881 *pp = edir->dyn_relocs;
3882 }
3883
3884 edir->dyn_relocs = eind->dyn_relocs;
3885 eind->dyn_relocs = NULL;
3886 }
3887
3888 edir->is_func |= eind->is_func;
3889 edir->is_func_descriptor |= eind->is_func_descriptor;
3890 edir->tls_mask |= eind->tls_mask;
3891
3892 /* If called to transfer flags for a weakdef during processing
3893 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3894 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3895 if (!(ELIMINATE_COPY_RELOCS
3896 && eind->elf.root.type != bfd_link_hash_indirect
3897 && edir->elf.dynamic_adjusted))
3898 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3899
3900 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3901 edir->elf.ref_regular |= eind->elf.ref_regular;
3902 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3903 edir->elf.needs_plt |= eind->elf.needs_plt;
3904
3905 /* If we were called to copy over info for a weak sym, that's all. */
3906 if (eind->elf.root.type != bfd_link_hash_indirect)
3907 return;
3908
3909 /* Copy over got entries that we may have already seen to the
3910 symbol which just became indirect. */
3911 if (eind->elf.got.glist != NULL)
3912 {
3913 if (edir->elf.got.glist != NULL)
3914 {
3915 struct got_entry **entp;
3916 struct got_entry *ent;
3917
3918 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3919 {
3920 struct got_entry *dent;
3921
3922 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3923 if (dent->addend == ent->addend
3924 && dent->owner == ent->owner
3925 && dent->tls_type == ent->tls_type)
3926 {
3927 dent->got.refcount += ent->got.refcount;
3928 *entp = ent->next;
3929 break;
3930 }
3931 if (dent == NULL)
3932 entp = &ent->next;
3933 }
3934 *entp = edir->elf.got.glist;
3935 }
3936
3937 edir->elf.got.glist = eind->elf.got.glist;
3938 eind->elf.got.glist = NULL;
3939 }
3940
3941 /* And plt entries. */
3942 move_plt_plist (eind, edir);
3943
3944 if (eind->elf.dynindx != -1)
3945 {
3946 if (edir->elf.dynindx != -1)
3947 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3948 edir->elf.dynstr_index);
3949 edir->elf.dynindx = eind->elf.dynindx;
3950 edir->elf.dynstr_index = eind->elf.dynstr_index;
3951 eind->elf.dynindx = -1;
3952 eind->elf.dynstr_index = 0;
3953 }
3954 }
3955
3956 /* Find the function descriptor hash entry from the given function code
3957 hash entry FH. Link the entries via their OH fields. */
3958
3959 static struct ppc_link_hash_entry *
3960 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3961 {
3962 struct ppc_link_hash_entry *fdh = fh->oh;
3963
3964 if (fdh == NULL)
3965 {
3966 const char *fd_name = fh->elf.root.root.string + 1;
3967
3968 fdh = (struct ppc_link_hash_entry *)
3969 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3970 if (fdh != NULL)
3971 {
3972 fdh->is_func_descriptor = 1;
3973 fdh->oh = fh;
3974 fh->is_func = 1;
3975 fh->oh = fdh;
3976 }
3977 }
3978
3979 return fdh;
3980 }
3981
3982 /* Make a fake function descriptor sym for the code sym FH. */
3983
3984 static struct ppc_link_hash_entry *
3985 make_fdh (struct bfd_link_info *info,
3986 struct ppc_link_hash_entry *fh)
3987 {
3988 bfd *abfd;
3989 asymbol *newsym;
3990 struct bfd_link_hash_entry *bh;
3991 struct ppc_link_hash_entry *fdh;
3992
3993 abfd = fh->elf.root.u.undef.abfd;
3994 newsym = bfd_make_empty_symbol (abfd);
3995 newsym->name = fh->elf.root.root.string + 1;
3996 newsym->section = bfd_und_section_ptr;
3997 newsym->value = 0;
3998 newsym->flags = BSF_WEAK;
3999
4000 bh = NULL;
4001 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4002 newsym->flags, newsym->section,
4003 newsym->value, NULL, FALSE, FALSE,
4004 &bh))
4005 return NULL;
4006
4007 fdh = (struct ppc_link_hash_entry *) bh;
4008 fdh->elf.non_elf = 0;
4009 fdh->fake = 1;
4010 fdh->is_func_descriptor = 1;
4011 fdh->oh = fh;
4012 fh->is_func = 1;
4013 fh->oh = fdh;
4014 return fdh;
4015 }
4016
4017 /* Hacks to support old ABI code.
4018 When making function calls, old ABI code references function entry
4019 points (dot symbols), while new ABI code references the function
4020 descriptor symbol. We need to make any combination of reference and
4021 definition work together, without breaking archive linking.
4022
4023 For a defined function "foo" and an undefined call to "bar":
4024 An old object defines "foo" and ".foo", references ".bar" (possibly
4025 "bar" too).
4026 A new object defines "foo" and references "bar".
4027
4028 A new object thus has no problem with its undefined symbols being
4029 satisfied by definitions in an old object. On the other hand, the
4030 old object won't have ".bar" satisfied by a new object. */
4031
4032 /* Fix function descriptor symbols defined in .opd sections to be
4033 function type. */
4034
4035 static bfd_boolean
4036 ppc64_elf_add_symbol_hook (bfd *ibfd,
4037 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4038 Elf_Internal_Sym *isym,
4039 const char **name,
4040 flagword *flags ATTRIBUTE_UNUSED,
4041 asection **sec,
4042 bfd_vma *value ATTRIBUTE_UNUSED)
4043 {
4044 if (*sec != NULL
4045 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4046 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4047
4048 if ((*name)[0] == '.'
4049 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4050 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4051 && is_ppc64_elf_target (ibfd->xvec))
4052 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4053
4054 return TRUE;
4055 }
4056
4057 /* This function makes an old ABI object reference to ".bar" cause the
4058 inclusion of a new ABI object archive that defines "bar".
4059 NAME is a symbol defined in an archive. Return a symbol in the hash
4060 table that might be satisfied by the archive symbols. */
4061
4062 static struct elf_link_hash_entry *
4063 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4064 struct bfd_link_info *info,
4065 const char *name)
4066 {
4067 struct elf_link_hash_entry *h;
4068 char *dot_name;
4069 size_t len;
4070
4071 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4072 if (h != NULL
4073 /* Don't return this sym if it is a fake function descriptor
4074 created by add_symbol_adjust. */
4075 && !(h->root.type == bfd_link_hash_undefweak
4076 && ((struct ppc_link_hash_entry *) h)->fake))
4077 return h;
4078
4079 if (name[0] == '.')
4080 return h;
4081
4082 len = strlen (name);
4083 dot_name = bfd_alloc (abfd, len + 2);
4084 if (dot_name == NULL)
4085 return (struct elf_link_hash_entry *) 0 - 1;
4086 dot_name[0] = '.';
4087 memcpy (dot_name + 1, name, len + 1);
4088 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4089 bfd_release (abfd, dot_name);
4090 return h;
4091 }
4092
4093 /* This function satisfies all old ABI object references to ".bar" if a
4094 new ABI object defines "bar". Well, at least, undefined dot symbols
4095 are made weak. This stops later archive searches from including an
4096 object if we already have a function descriptor definition. It also
4097 prevents the linker complaining about undefined symbols.
4098 We also check and correct mismatched symbol visibility here. The
4099 most restrictive visibility of the function descriptor and the
4100 function entry symbol is used. */
4101
4102 struct add_symbol_adjust_data
4103 {
4104 struct bfd_link_info *info;
4105 bfd_boolean ok;
4106 };
4107
4108 static bfd_boolean
4109 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4110 {
4111 struct add_symbol_adjust_data *data;
4112 struct ppc_link_hash_table *htab;
4113 struct ppc_link_hash_entry *eh;
4114 struct ppc_link_hash_entry *fdh;
4115
4116 if (h->root.type == bfd_link_hash_indirect)
4117 return TRUE;
4118
4119 if (h->root.type == bfd_link_hash_warning)
4120 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4121
4122 if (h->root.root.string[0] != '.')
4123 return TRUE;
4124
4125 data = inf;
4126 htab = ppc_hash_table (data->info);
4127 eh = (struct ppc_link_hash_entry *) h;
4128 fdh = get_fdh (eh, htab);
4129 if (fdh == NULL
4130 && !data->info->relocatable
4131 && (eh->elf.root.type == bfd_link_hash_undefined
4132 || eh->elf.root.type == bfd_link_hash_undefweak)
4133 && eh->elf.ref_regular)
4134 {
4135 /* Make an undefweak function descriptor sym, which is enough to
4136 pull in an --as-needed shared lib, but won't cause link
4137 errors. Archives are handled elsewhere. */
4138 fdh = make_fdh (data->info, eh);
4139 if (fdh == NULL)
4140 data->ok = FALSE;
4141 else
4142 fdh->elf.ref_regular = 1;
4143 }
4144 else if (fdh != NULL)
4145 {
4146 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4147 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4148 if (entry_vis < descr_vis)
4149 fdh->elf.other += entry_vis - descr_vis;
4150 else if (entry_vis > descr_vis)
4151 eh->elf.other += descr_vis - entry_vis;
4152
4153 if ((fdh->elf.root.type == bfd_link_hash_defined
4154 || fdh->elf.root.type == bfd_link_hash_defweak)
4155 && eh->elf.root.type == bfd_link_hash_undefined)
4156 {
4157 eh->elf.root.type = bfd_link_hash_undefweak;
4158 eh->was_undefined = 1;
4159 htab->twiddled_syms = 1;
4160 }
4161 }
4162
4163 return TRUE;
4164 }
4165
4166 static bfd_boolean
4167 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4168 {
4169 struct ppc_link_hash_table *htab;
4170 struct add_symbol_adjust_data data;
4171
4172 if (!is_ppc64_elf_target (abfd->xvec))
4173 return TRUE;
4174
4175 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4176 return TRUE;
4177 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4178
4179 htab = ppc_hash_table (info);
4180 if (!is_ppc64_elf_target (htab->elf.root.creator))
4181 return TRUE;
4182
4183 data.info = info;
4184 data.ok = TRUE;
4185 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4186
4187 /* We need to fix the undefs list for any syms we have twiddled to
4188 undef_weak. */
4189 if (htab->twiddled_syms)
4190 {
4191 bfd_link_repair_undef_list (&htab->elf.root);
4192 htab->twiddled_syms = 0;
4193 }
4194 return data.ok;
4195 }
4196
4197 static bfd_boolean
4198 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4199 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4200 {
4201 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4202 char *local_got_tls_masks;
4203
4204 if (local_got_ents == NULL)
4205 {
4206 bfd_size_type size = symtab_hdr->sh_info;
4207
4208 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4209 local_got_ents = bfd_zalloc (abfd, size);
4210 if (local_got_ents == NULL)
4211 return FALSE;
4212 elf_local_got_ents (abfd) = local_got_ents;
4213 }
4214
4215 if ((tls_type & TLS_EXPLICIT) == 0)
4216 {
4217 struct got_entry *ent;
4218
4219 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4220 if (ent->addend == r_addend
4221 && ent->owner == abfd
4222 && ent->tls_type == tls_type)
4223 break;
4224 if (ent == NULL)
4225 {
4226 bfd_size_type amt = sizeof (*ent);
4227 ent = bfd_alloc (abfd, amt);
4228 if (ent == NULL)
4229 return FALSE;
4230 ent->next = local_got_ents[r_symndx];
4231 ent->addend = r_addend;
4232 ent->owner = abfd;
4233 ent->tls_type = tls_type;
4234 ent->got.refcount = 0;
4235 local_got_ents[r_symndx] = ent;
4236 }
4237 ent->got.refcount += 1;
4238 }
4239
4240 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4241 local_got_tls_masks[r_symndx] |= tls_type;
4242 return TRUE;
4243 }
4244
4245 static bfd_boolean
4246 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4247 {
4248 struct plt_entry *ent;
4249
4250 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4251 if (ent->addend == addend)
4252 break;
4253 if (ent == NULL)
4254 {
4255 bfd_size_type amt = sizeof (*ent);
4256 ent = bfd_alloc (abfd, amt);
4257 if (ent == NULL)
4258 return FALSE;
4259 ent->next = eh->elf.plt.plist;
4260 ent->addend = addend;
4261 ent->plt.refcount = 0;
4262 eh->elf.plt.plist = ent;
4263 }
4264 ent->plt.refcount += 1;
4265 eh->elf.needs_plt = 1;
4266 if (eh->elf.root.root.string[0] == '.'
4267 && eh->elf.root.root.string[1] != '\0')
4268 eh->is_func = 1;
4269 return TRUE;
4270 }
4271
4272 /* Look through the relocs for a section during the first phase, and
4273 calculate needed space in the global offset table, procedure
4274 linkage table, and dynamic reloc sections. */
4275
4276 static bfd_boolean
4277 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4278 asection *sec, const Elf_Internal_Rela *relocs)
4279 {
4280 struct ppc_link_hash_table *htab;
4281 Elf_Internal_Shdr *symtab_hdr;
4282 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4283 const Elf_Internal_Rela *rel;
4284 const Elf_Internal_Rela *rel_end;
4285 asection *sreloc;
4286 asection **opd_sym_map;
4287
4288 if (info->relocatable)
4289 return TRUE;
4290
4291 /* Don't do anything special with non-loaded, non-alloced sections.
4292 In particular, any relocs in such sections should not affect GOT
4293 and PLT reference counting (ie. we don't allow them to create GOT
4294 or PLT entries), there's no possibility or desire to optimize TLS
4295 relocs, and there's not much point in propagating relocs to shared
4296 libs that the dynamic linker won't relocate. */
4297 if ((sec->flags & SEC_ALLOC) == 0)
4298 return TRUE;
4299
4300 htab = ppc_hash_table (info);
4301 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4302
4303 sym_hashes = elf_sym_hashes (abfd);
4304 sym_hashes_end = (sym_hashes
4305 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4306 - symtab_hdr->sh_info);
4307
4308 sreloc = NULL;
4309 opd_sym_map = NULL;
4310 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4311 {
4312 /* Garbage collection needs some extra help with .opd sections.
4313 We don't want to necessarily keep everything referenced by
4314 relocs in .opd, as that would keep all functions. Instead,
4315 if we reference an .opd symbol (a function descriptor), we
4316 want to keep the function code symbol's section. This is
4317 easy for global symbols, but for local syms we need to keep
4318 information about the associated function section. Later, if
4319 edit_opd deletes entries, we'll use this array to adjust
4320 local syms in .opd. */
4321 union opd_info {
4322 asection *func_section;
4323 long entry_adjust;
4324 };
4325 bfd_size_type amt;
4326
4327 amt = sec->size * sizeof (union opd_info) / 8;
4328 opd_sym_map = bfd_zalloc (abfd, amt);
4329 if (opd_sym_map == NULL)
4330 return FALSE;
4331 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4332 }
4333
4334 if (htab->sfpr == NULL
4335 && !create_linkage_sections (htab->elf.dynobj, info))
4336 return FALSE;
4337
4338 rel_end = relocs + sec->reloc_count;
4339 for (rel = relocs; rel < rel_end; rel++)
4340 {
4341 unsigned long r_symndx;
4342 struct elf_link_hash_entry *h;
4343 enum elf_ppc64_reloc_type r_type;
4344 int tls_type = 0;
4345
4346 r_symndx = ELF64_R_SYM (rel->r_info);
4347 if (r_symndx < symtab_hdr->sh_info)
4348 h = NULL;
4349 else
4350 {
4351 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4352 while (h->root.type == bfd_link_hash_indirect
4353 || h->root.type == bfd_link_hash_warning)
4354 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4355 }
4356
4357 r_type = ELF64_R_TYPE (rel->r_info);
4358 switch (r_type)
4359 {
4360 case R_PPC64_GOT_TLSLD16:
4361 case R_PPC64_GOT_TLSLD16_LO:
4362 case R_PPC64_GOT_TLSLD16_HI:
4363 case R_PPC64_GOT_TLSLD16_HA:
4364 ppc64_tlsld_got (abfd)->refcount += 1;
4365 tls_type = TLS_TLS | TLS_LD;
4366 goto dogottls;
4367
4368 case R_PPC64_GOT_TLSGD16:
4369 case R_PPC64_GOT_TLSGD16_LO:
4370 case R_PPC64_GOT_TLSGD16_HI:
4371 case R_PPC64_GOT_TLSGD16_HA:
4372 tls_type = TLS_TLS | TLS_GD;
4373 goto dogottls;
4374
4375 case R_PPC64_GOT_TPREL16_DS:
4376 case R_PPC64_GOT_TPREL16_LO_DS:
4377 case R_PPC64_GOT_TPREL16_HI:
4378 case R_PPC64_GOT_TPREL16_HA:
4379 if (info->shared)
4380 info->flags |= DF_STATIC_TLS;
4381 tls_type = TLS_TLS | TLS_TPREL;
4382 goto dogottls;
4383
4384 case R_PPC64_GOT_DTPREL16_DS:
4385 case R_PPC64_GOT_DTPREL16_LO_DS:
4386 case R_PPC64_GOT_DTPREL16_HI:
4387 case R_PPC64_GOT_DTPREL16_HA:
4388 tls_type = TLS_TLS | TLS_DTPREL;
4389 dogottls:
4390 sec->has_tls_reloc = 1;
4391 /* Fall thru */
4392
4393 case R_PPC64_GOT16:
4394 case R_PPC64_GOT16_DS:
4395 case R_PPC64_GOT16_HA:
4396 case R_PPC64_GOT16_HI:
4397 case R_PPC64_GOT16_LO:
4398 case R_PPC64_GOT16_LO_DS:
4399 /* This symbol requires a global offset table entry. */
4400 sec->has_toc_reloc = 1;
4401 if (ppc64_elf_tdata (abfd)->got == NULL
4402 && !create_got_section (abfd, info))
4403 return FALSE;
4404
4405 if (h != NULL)
4406 {
4407 struct ppc_link_hash_entry *eh;
4408 struct got_entry *ent;
4409
4410 eh = (struct ppc_link_hash_entry *) h;
4411 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4412 if (ent->addend == rel->r_addend
4413 && ent->owner == abfd
4414 && ent->tls_type == tls_type)
4415 break;
4416 if (ent == NULL)
4417 {
4418 bfd_size_type amt = sizeof (*ent);
4419 ent = bfd_alloc (abfd, amt);
4420 if (ent == NULL)
4421 return FALSE;
4422 ent->next = eh->elf.got.glist;
4423 ent->addend = rel->r_addend;
4424 ent->owner = abfd;
4425 ent->tls_type = tls_type;
4426 ent->got.refcount = 0;
4427 eh->elf.got.glist = ent;
4428 }
4429 ent->got.refcount += 1;
4430 eh->tls_mask |= tls_type;
4431 }
4432 else
4433 /* This is a global offset table entry for a local symbol. */
4434 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4435 rel->r_addend, tls_type))
4436 return FALSE;
4437 break;
4438
4439 case R_PPC64_PLT16_HA:
4440 case R_PPC64_PLT16_HI:
4441 case R_PPC64_PLT16_LO:
4442 case R_PPC64_PLT32:
4443 case R_PPC64_PLT64:
4444 /* This symbol requires a procedure linkage table entry. We
4445 actually build the entry in adjust_dynamic_symbol,
4446 because this might be a case of linking PIC code without
4447 linking in any dynamic objects, in which case we don't
4448 need to generate a procedure linkage table after all. */
4449 if (h == NULL)
4450 {
4451 /* It does not make sense to have a procedure linkage
4452 table entry for a local symbol. */
4453 bfd_set_error (bfd_error_bad_value);
4454 return FALSE;
4455 }
4456 else
4457 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4458 rel->r_addend))
4459 return FALSE;
4460 break;
4461
4462 /* The following relocations don't need to propagate the
4463 relocation if linking a shared object since they are
4464 section relative. */
4465 case R_PPC64_SECTOFF:
4466 case R_PPC64_SECTOFF_LO:
4467 case R_PPC64_SECTOFF_HI:
4468 case R_PPC64_SECTOFF_HA:
4469 case R_PPC64_SECTOFF_DS:
4470 case R_PPC64_SECTOFF_LO_DS:
4471 case R_PPC64_DTPREL16:
4472 case R_PPC64_DTPREL16_LO:
4473 case R_PPC64_DTPREL16_HI:
4474 case R_PPC64_DTPREL16_HA:
4475 case R_PPC64_DTPREL16_DS:
4476 case R_PPC64_DTPREL16_LO_DS:
4477 case R_PPC64_DTPREL16_HIGHER:
4478 case R_PPC64_DTPREL16_HIGHERA:
4479 case R_PPC64_DTPREL16_HIGHEST:
4480 case R_PPC64_DTPREL16_HIGHESTA:
4481 break;
4482
4483 /* Nor do these. */
4484 case R_PPC64_TOC16:
4485 case R_PPC64_TOC16_LO:
4486 case R_PPC64_TOC16_HI:
4487 case R_PPC64_TOC16_HA:
4488 case R_PPC64_TOC16_DS:
4489 case R_PPC64_TOC16_LO_DS:
4490 sec->has_toc_reloc = 1;
4491 break;
4492
4493 /* This relocation describes the C++ object vtable hierarchy.
4494 Reconstruct it for later use during GC. */
4495 case R_PPC64_GNU_VTINHERIT:
4496 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4497 return FALSE;
4498 break;
4499
4500 /* This relocation describes which C++ vtable entries are actually
4501 used. Record for later use during GC. */
4502 case R_PPC64_GNU_VTENTRY:
4503 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4504 return FALSE;
4505 break;
4506
4507 case R_PPC64_REL14:
4508 case R_PPC64_REL14_BRTAKEN:
4509 case R_PPC64_REL14_BRNTAKEN:
4510 {
4511 asection *dest = NULL;
4512
4513 /* Heuristic: If jumping outside our section, chances are
4514 we are going to need a stub. */
4515 if (h != NULL)
4516 {
4517 /* If the sym is weak it may be overridden later, so
4518 don't assume we know where a weak sym lives. */
4519 if (h->root.type == bfd_link_hash_defined)
4520 dest = h->root.u.def.section;
4521 }
4522 else
4523 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4524 sec, r_symndx);
4525 if (dest != sec)
4526 htab->has_14bit_branch = 1;
4527 }
4528 /* Fall through. */
4529
4530 case R_PPC64_REL24:
4531 if (h != NULL)
4532 {
4533 /* We may need a .plt entry if the function this reloc
4534 refers to is in a shared lib. */
4535 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4536 rel->r_addend))
4537 return FALSE;
4538 if (h == &htab->tls_get_addr->elf
4539 || h == &htab->tls_get_addr_fd->elf)
4540 sec->has_tls_reloc = 1;
4541 else if (htab->tls_get_addr == NULL
4542 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4543 && (h->root.root.string[15] == 0
4544 || h->root.root.string[15] == '@'))
4545 {
4546 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4547 sec->has_tls_reloc = 1;
4548 }
4549 else if (htab->tls_get_addr_fd == NULL
4550 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4551 && (h->root.root.string[14] == 0
4552 || h->root.root.string[14] == '@'))
4553 {
4554 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4555 sec->has_tls_reloc = 1;
4556 }
4557 }
4558 break;
4559
4560 case R_PPC64_TPREL64:
4561 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4562 if (info->shared)
4563 info->flags |= DF_STATIC_TLS;
4564 goto dotlstoc;
4565
4566 case R_PPC64_DTPMOD64:
4567 if (rel + 1 < rel_end
4568 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4569 && rel[1].r_offset == rel->r_offset + 8)
4570 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4571 else
4572 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4573 goto dotlstoc;
4574
4575 case R_PPC64_DTPREL64:
4576 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4577 if (rel != relocs
4578 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4579 && rel[-1].r_offset == rel->r_offset - 8)
4580 /* This is the second reloc of a dtpmod, dtprel pair.
4581 Don't mark with TLS_DTPREL. */
4582 goto dodyn;
4583
4584 dotlstoc:
4585 sec->has_tls_reloc = 1;
4586 if (h != NULL)
4587 {
4588 struct ppc_link_hash_entry *eh;
4589 eh = (struct ppc_link_hash_entry *) h;
4590 eh->tls_mask |= tls_type;
4591 }
4592 else
4593 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4594 rel->r_addend, tls_type))
4595 return FALSE;
4596
4597 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4598 {
4599 /* One extra to simplify get_tls_mask. */
4600 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4601 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4602 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4603 return FALSE;
4604 }
4605 BFD_ASSERT (rel->r_offset % 8 == 0);
4606 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4607
4608 /* Mark the second slot of a GD or LD entry.
4609 -1 to indicate GD and -2 to indicate LD. */
4610 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4611 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4612 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4613 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4614 goto dodyn;
4615
4616 case R_PPC64_TPREL16:
4617 case R_PPC64_TPREL16_LO:
4618 case R_PPC64_TPREL16_HI:
4619 case R_PPC64_TPREL16_HA:
4620 case R_PPC64_TPREL16_DS:
4621 case R_PPC64_TPREL16_LO_DS:
4622 case R_PPC64_TPREL16_HIGHER:
4623 case R_PPC64_TPREL16_HIGHERA:
4624 case R_PPC64_TPREL16_HIGHEST:
4625 case R_PPC64_TPREL16_HIGHESTA:
4626 if (info->shared)
4627 {
4628 info->flags |= DF_STATIC_TLS;
4629 goto dodyn;
4630 }
4631 break;
4632
4633 case R_PPC64_ADDR64:
4634 if (opd_sym_map != NULL
4635 && rel + 1 < rel_end
4636 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4637 {
4638 if (h != NULL)
4639 {
4640 if (h->root.root.string[0] == '.'
4641 && h->root.root.string[1] != 0
4642 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4643 ;
4644 else
4645 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4646 }
4647 else
4648 {
4649 asection *s;
4650
4651 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4652 r_symndx);
4653 if (s == NULL)
4654 return FALSE;
4655 else if (s != sec)
4656 opd_sym_map[rel->r_offset / 8] = s;
4657 }
4658 }
4659 /* Fall through. */
4660
4661 case R_PPC64_REL30:
4662 case R_PPC64_REL32:
4663 case R_PPC64_REL64:
4664 case R_PPC64_ADDR14:
4665 case R_PPC64_ADDR14_BRNTAKEN:
4666 case R_PPC64_ADDR14_BRTAKEN:
4667 case R_PPC64_ADDR16:
4668 case R_PPC64_ADDR16_DS:
4669 case R_PPC64_ADDR16_HA:
4670 case R_PPC64_ADDR16_HI:
4671 case R_PPC64_ADDR16_HIGHER:
4672 case R_PPC64_ADDR16_HIGHERA:
4673 case R_PPC64_ADDR16_HIGHEST:
4674 case R_PPC64_ADDR16_HIGHESTA:
4675 case R_PPC64_ADDR16_LO:
4676 case R_PPC64_ADDR16_LO_DS:
4677 case R_PPC64_ADDR24:
4678 case R_PPC64_ADDR32:
4679 case R_PPC64_UADDR16:
4680 case R_PPC64_UADDR32:
4681 case R_PPC64_UADDR64:
4682 case R_PPC64_TOC:
4683 if (h != NULL && !info->shared)
4684 /* We may need a copy reloc. */
4685 h->non_got_ref = 1;
4686
4687 /* Don't propagate .opd relocs. */
4688 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4689 break;
4690
4691 /* If we are creating a shared library, and this is a reloc
4692 against a global symbol, or a non PC relative reloc
4693 against a local symbol, then we need to copy the reloc
4694 into the shared library. However, if we are linking with
4695 -Bsymbolic, we do not need to copy a reloc against a
4696 global symbol which is defined in an object we are
4697 including in the link (i.e., DEF_REGULAR is set). At
4698 this point we have not seen all the input files, so it is
4699 possible that DEF_REGULAR is not set now but will be set
4700 later (it is never cleared). In case of a weak definition,
4701 DEF_REGULAR may be cleared later by a strong definition in
4702 a shared library. We account for that possibility below by
4703 storing information in the dyn_relocs field of the hash
4704 table entry. A similar situation occurs when creating
4705 shared libraries and symbol visibility changes render the
4706 symbol local.
4707
4708 If on the other hand, we are creating an executable, we
4709 may need to keep relocations for symbols satisfied by a
4710 dynamic library if we manage to avoid copy relocs for the
4711 symbol. */
4712 dodyn:
4713 if ((info->shared
4714 && (MUST_BE_DYN_RELOC (r_type)
4715 || (h != NULL
4716 && (! info->symbolic
4717 || h->root.type == bfd_link_hash_defweak
4718 || !h->def_regular))))
4719 || (ELIMINATE_COPY_RELOCS
4720 && !info->shared
4721 && h != NULL
4722 && (h->root.type == bfd_link_hash_defweak
4723 || !h->def_regular)))
4724 {
4725 struct ppc_dyn_relocs *p;
4726 struct ppc_dyn_relocs **head;
4727
4728 /* We must copy these reloc types into the output file.
4729 Create a reloc section in dynobj and make room for
4730 this reloc. */
4731 if (sreloc == NULL)
4732 {
4733 const char *name;
4734 bfd *dynobj;
4735
4736 name = (bfd_elf_string_from_elf_section
4737 (abfd,
4738 elf_elfheader (abfd)->e_shstrndx,
4739 elf_section_data (sec)->rel_hdr.sh_name));
4740 if (name == NULL)
4741 return FALSE;
4742
4743 if (strncmp (name, ".rela", 5) != 0
4744 || strcmp (bfd_get_section_name (abfd, sec),
4745 name + 5) != 0)
4746 {
4747 (*_bfd_error_handler)
4748 (_("%B: bad relocation section name `%s\'"),
4749 abfd, name);
4750 bfd_set_error (bfd_error_bad_value);
4751 }
4752
4753 dynobj = htab->elf.dynobj;
4754 sreloc = bfd_get_section_by_name (dynobj, name);
4755 if (sreloc == NULL)
4756 {
4757 flagword flags;
4758
4759 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4760 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4761 | SEC_ALLOC | SEC_LOAD);
4762 sreloc = bfd_make_section_with_flags (dynobj,
4763 name,
4764 flags);
4765 if (sreloc == NULL
4766 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4767 return FALSE;
4768 }
4769 elf_section_data (sec)->sreloc = sreloc;
4770 }
4771
4772 /* If this is a global symbol, we count the number of
4773 relocations we need for this symbol. */
4774 if (h != NULL)
4775 {
4776 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4777 }
4778 else
4779 {
4780 /* Track dynamic relocs needed for local syms too.
4781 We really need local syms available to do this
4782 easily. Oh well. */
4783
4784 asection *s;
4785 void *vpp;
4786
4787 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4788 sec, r_symndx);
4789 if (s == NULL)
4790 return FALSE;
4791
4792 vpp = &elf_section_data (s)->local_dynrel;
4793 head = (struct ppc_dyn_relocs **) vpp;
4794 }
4795
4796 p = *head;
4797 if (p == NULL || p->sec != sec)
4798 {
4799 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4800 if (p == NULL)
4801 return FALSE;
4802 p->next = *head;
4803 *head = p;
4804 p->sec = sec;
4805 p->count = 0;
4806 p->pc_count = 0;
4807 }
4808
4809 p->count += 1;
4810 if (!MUST_BE_DYN_RELOC (r_type))
4811 p->pc_count += 1;
4812 }
4813 break;
4814
4815 default:
4816 break;
4817 }
4818 }
4819
4820 return TRUE;
4821 }
4822
4823 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4824 of the code entry point, and its section. */
4825
4826 static bfd_vma
4827 opd_entry_value (asection *opd_sec,
4828 bfd_vma offset,
4829 asection **code_sec,
4830 bfd_vma *code_off)
4831 {
4832 bfd *opd_bfd = opd_sec->owner;
4833 Elf_Internal_Rela *relocs;
4834 Elf_Internal_Rela *lo, *hi, *look;
4835 bfd_vma val;
4836
4837 /* No relocs implies we are linking a --just-symbols object. */
4838 if (opd_sec->reloc_count == 0)
4839 {
4840 bfd_vma val;
4841
4842 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4843 return (bfd_vma) -1;
4844
4845 if (code_sec != NULL)
4846 {
4847 asection *sec, *likely = NULL;
4848 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4849 if (sec->vma <= val
4850 && (sec->flags & SEC_LOAD) != 0
4851 && (sec->flags & SEC_ALLOC) != 0)
4852 likely = sec;
4853 if (likely != NULL)
4854 {
4855 *code_sec = likely;
4856 if (code_off != NULL)
4857 *code_off = val - likely->vma;
4858 }
4859 }
4860 return val;
4861 }
4862
4863 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4864 if (relocs == NULL)
4865 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4866
4867 /* Go find the opd reloc at the sym address. */
4868 lo = relocs;
4869 BFD_ASSERT (lo != NULL);
4870 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4871 val = (bfd_vma) -1;
4872 while (lo < hi)
4873 {
4874 look = lo + (hi - lo) / 2;
4875 if (look->r_offset < offset)
4876 lo = look + 1;
4877 else if (look->r_offset > offset)
4878 hi = look;
4879 else
4880 {
4881 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4882 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4883 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4884 {
4885 unsigned long symndx = ELF64_R_SYM (look->r_info);
4886 asection *sec;
4887
4888 if (symndx < symtab_hdr->sh_info)
4889 {
4890 Elf_Internal_Sym *sym;
4891
4892 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4893 if (sym == NULL)
4894 {
4895 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4896 symtab_hdr->sh_info,
4897 0, NULL, NULL, NULL);
4898 if (sym == NULL)
4899 break;
4900 symtab_hdr->contents = (bfd_byte *) sym;
4901 }
4902
4903 sym += symndx;
4904 val = sym->st_value;
4905 sec = NULL;
4906 if ((sym->st_shndx != SHN_UNDEF
4907 && sym->st_shndx < SHN_LORESERVE)
4908 || sym->st_shndx > SHN_HIRESERVE)
4909 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4910 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4911 }
4912 else
4913 {
4914 struct elf_link_hash_entry **sym_hashes;
4915 struct elf_link_hash_entry *rh;
4916
4917 sym_hashes = elf_sym_hashes (opd_bfd);
4918 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4919 while (rh->root.type == bfd_link_hash_indirect
4920 || rh->root.type == bfd_link_hash_warning)
4921 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4922 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4923 || rh->root.type == bfd_link_hash_defweak);
4924 val = rh->root.u.def.value;
4925 sec = rh->root.u.def.section;
4926 }
4927 val += look->r_addend;
4928 if (code_off != NULL)
4929 *code_off = val;
4930 if (code_sec != NULL)
4931 *code_sec = sec;
4932 if (sec != NULL && sec->output_section != NULL)
4933 val += sec->output_section->vma + sec->output_offset;
4934 }
4935 break;
4936 }
4937 }
4938
4939 return val;
4940 }
4941
4942 /* Return the section that should be marked against GC for a given
4943 relocation. */
4944
4945 static asection *
4946 ppc64_elf_gc_mark_hook (asection *sec,
4947 struct bfd_link_info *info,
4948 Elf_Internal_Rela *rel,
4949 struct elf_link_hash_entry *h,
4950 Elf_Internal_Sym *sym)
4951 {
4952 asection *rsec;
4953
4954 /* First mark all our entry sym sections. */
4955 if (info->gc_sym_list != NULL)
4956 {
4957 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4958 struct bfd_sym_chain *sym = info->gc_sym_list;
4959
4960 info->gc_sym_list = NULL;
4961 for (; sym != NULL; sym = sym->next)
4962 {
4963 struct ppc_link_hash_entry *eh;
4964
4965 eh = (struct ppc_link_hash_entry *)
4966 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4967 if (eh == NULL)
4968 continue;
4969 if (eh->elf.root.type != bfd_link_hash_defined
4970 && eh->elf.root.type != bfd_link_hash_defweak)
4971 continue;
4972
4973 if (eh->is_func_descriptor
4974 && (eh->oh->elf.root.type == bfd_link_hash_defined
4975 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4976 rsec = eh->oh->elf.root.u.def.section;
4977 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4978 && opd_entry_value (eh->elf.root.u.def.section,
4979 eh->elf.root.u.def.value,
4980 &rsec, NULL) != (bfd_vma) -1)
4981 ;
4982 else
4983 continue;
4984
4985 if (!rsec->gc_mark)
4986 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4987
4988 rsec = eh->elf.root.u.def.section;
4989 if (!rsec->gc_mark)
4990 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4991 }
4992 }
4993
4994 /* Syms return NULL if we're marking .opd, so we avoid marking all
4995 function sections, as all functions are referenced in .opd. */
4996 rsec = NULL;
4997 if (get_opd_info (sec) != NULL)
4998 return rsec;
4999
5000 if (h != NULL)
5001 {
5002 enum elf_ppc64_reloc_type r_type;
5003 struct ppc_link_hash_entry *eh;
5004
5005 r_type = ELF64_R_TYPE (rel->r_info);
5006 switch (r_type)
5007 {
5008 case R_PPC64_GNU_VTINHERIT:
5009 case R_PPC64_GNU_VTENTRY:
5010 break;
5011
5012 default:
5013 switch (h->root.type)
5014 {
5015 case bfd_link_hash_defined:
5016 case bfd_link_hash_defweak:
5017 eh = (struct ppc_link_hash_entry *) h;
5018 if (eh->oh != NULL
5019 && eh->oh->is_func_descriptor
5020 && (eh->oh->elf.root.type == bfd_link_hash_defined
5021 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5022 eh = eh->oh;
5023
5024 /* Function descriptor syms cause the associated
5025 function code sym section to be marked. */
5026 if (eh->is_func_descriptor
5027 && (eh->oh->elf.root.type == bfd_link_hash_defined
5028 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5029 {
5030 /* They also mark their opd section. */
5031 if (!eh->elf.root.u.def.section->gc_mark)
5032 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5033 ppc64_elf_gc_mark_hook);
5034
5035 rsec = eh->oh->elf.root.u.def.section;
5036 }
5037 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5038 && opd_entry_value (eh->elf.root.u.def.section,
5039 eh->elf.root.u.def.value,
5040 &rsec, NULL) != (bfd_vma) -1)
5041 {
5042 if (!eh->elf.root.u.def.section->gc_mark)
5043 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5044 ppc64_elf_gc_mark_hook);
5045 }
5046 else
5047 rsec = h->root.u.def.section;
5048 break;
5049
5050 case bfd_link_hash_common:
5051 rsec = h->root.u.c.p->section;
5052 break;
5053
5054 default:
5055 break;
5056 }
5057 }
5058 }
5059 else
5060 {
5061 asection **opd_sym_section;
5062
5063 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5064 opd_sym_section = get_opd_info (rsec);
5065 if (opd_sym_section != NULL)
5066 {
5067 if (!rsec->gc_mark)
5068 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5069
5070 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5071 }
5072 }
5073
5074 return rsec;
5075 }
5076
5077 /* Update the .got, .plt. and dynamic reloc reference counts for the
5078 section being removed. */
5079
5080 static bfd_boolean
5081 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5082 asection *sec, const Elf_Internal_Rela *relocs)
5083 {
5084 struct ppc_link_hash_table *htab;
5085 Elf_Internal_Shdr *symtab_hdr;
5086 struct elf_link_hash_entry **sym_hashes;
5087 struct got_entry **local_got_ents;
5088 const Elf_Internal_Rela *rel, *relend;
5089
5090 if ((sec->flags & SEC_ALLOC) == 0)
5091 return TRUE;
5092
5093 elf_section_data (sec)->local_dynrel = NULL;
5094
5095 htab = ppc_hash_table (info);
5096 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5097 sym_hashes = elf_sym_hashes (abfd);
5098 local_got_ents = elf_local_got_ents (abfd);
5099
5100 relend = relocs + sec->reloc_count;
5101 for (rel = relocs; rel < relend; rel++)
5102 {
5103 unsigned long r_symndx;
5104 enum elf_ppc64_reloc_type r_type;
5105 struct elf_link_hash_entry *h = NULL;
5106 char tls_type = 0;
5107
5108 r_symndx = ELF64_R_SYM (rel->r_info);
5109 r_type = ELF64_R_TYPE (rel->r_info);
5110 if (r_symndx >= symtab_hdr->sh_info)
5111 {
5112 struct ppc_link_hash_entry *eh;
5113 struct ppc_dyn_relocs **pp;
5114 struct ppc_dyn_relocs *p;
5115
5116 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5117 while (h->root.type == bfd_link_hash_indirect
5118 || h->root.type == bfd_link_hash_warning)
5119 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5120 eh = (struct ppc_link_hash_entry *) h;
5121
5122 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5123 if (p->sec == sec)
5124 {
5125 /* Everything must go for SEC. */
5126 *pp = p->next;
5127 break;
5128 }
5129 }
5130
5131 switch (r_type)
5132 {
5133 case R_PPC64_GOT_TLSLD16:
5134 case R_PPC64_GOT_TLSLD16_LO:
5135 case R_PPC64_GOT_TLSLD16_HI:
5136 case R_PPC64_GOT_TLSLD16_HA:
5137 ppc64_tlsld_got (abfd)->refcount -= 1;
5138 tls_type = TLS_TLS | TLS_LD;
5139 goto dogot;
5140
5141 case R_PPC64_GOT_TLSGD16:
5142 case R_PPC64_GOT_TLSGD16_LO:
5143 case R_PPC64_GOT_TLSGD16_HI:
5144 case R_PPC64_GOT_TLSGD16_HA:
5145 tls_type = TLS_TLS | TLS_GD;
5146 goto dogot;
5147
5148 case R_PPC64_GOT_TPREL16_DS:
5149 case R_PPC64_GOT_TPREL16_LO_DS:
5150 case R_PPC64_GOT_TPREL16_HI:
5151 case R_PPC64_GOT_TPREL16_HA:
5152 tls_type = TLS_TLS | TLS_TPREL;
5153 goto dogot;
5154
5155 case R_PPC64_GOT_DTPREL16_DS:
5156 case R_PPC64_GOT_DTPREL16_LO_DS:
5157 case R_PPC64_GOT_DTPREL16_HI:
5158 case R_PPC64_GOT_DTPREL16_HA:
5159 tls_type = TLS_TLS | TLS_DTPREL;
5160 goto dogot;
5161
5162 case R_PPC64_GOT16:
5163 case R_PPC64_GOT16_DS:
5164 case R_PPC64_GOT16_HA:
5165 case R_PPC64_GOT16_HI:
5166 case R_PPC64_GOT16_LO:
5167 case R_PPC64_GOT16_LO_DS:
5168 dogot:
5169 {
5170 struct got_entry *ent;
5171
5172 if (h != NULL)
5173 ent = h->got.glist;
5174 else
5175 ent = local_got_ents[r_symndx];
5176
5177 for (; ent != NULL; ent = ent->next)
5178 if (ent->addend == rel->r_addend
5179 && ent->owner == abfd
5180 && ent->tls_type == tls_type)
5181 break;
5182 if (ent == NULL)
5183 abort ();
5184 if (ent->got.refcount > 0)
5185 ent->got.refcount -= 1;
5186 }
5187 break;
5188
5189 case R_PPC64_PLT16_HA:
5190 case R_PPC64_PLT16_HI:
5191 case R_PPC64_PLT16_LO:
5192 case R_PPC64_PLT32:
5193 case R_PPC64_PLT64:
5194 case R_PPC64_REL14:
5195 case R_PPC64_REL14_BRNTAKEN:
5196 case R_PPC64_REL14_BRTAKEN:
5197 case R_PPC64_REL24:
5198 if (h != NULL)
5199 {
5200 struct plt_entry *ent;
5201
5202 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5203 if (ent->addend == rel->r_addend)
5204 break;
5205 if (ent == NULL)
5206 abort ();
5207 if (ent->plt.refcount > 0)
5208 ent->plt.refcount -= 1;
5209 }
5210 break;
5211
5212 default:
5213 break;
5214 }
5215 }
5216 return TRUE;
5217 }
5218
5219 /* The maximum size of .sfpr. */
5220 #define SFPR_MAX (218*4)
5221
5222 struct sfpr_def_parms
5223 {
5224 const char name[12];
5225 unsigned char lo, hi;
5226 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5227 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5228 };
5229
5230 /* Auto-generate _save*, _rest* functions in .sfpr. */
5231
5232 static unsigned int
5233 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5234 {
5235 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5236 unsigned int i;
5237 size_t len = strlen (parm->name);
5238 bfd_boolean writing = FALSE;
5239 char sym[16];
5240
5241 memcpy (sym, parm->name, len);
5242 sym[len + 2] = 0;
5243
5244 for (i = parm->lo; i <= parm->hi; i++)
5245 {
5246 struct elf_link_hash_entry *h;
5247
5248 sym[len + 0] = i / 10 + '0';
5249 sym[len + 1] = i % 10 + '0';
5250 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5251 if (h != NULL
5252 && !h->def_regular)
5253 {
5254 h->root.type = bfd_link_hash_defined;
5255 h->root.u.def.section = htab->sfpr;
5256 h->root.u.def.value = htab->sfpr->size;
5257 h->type = STT_FUNC;
5258 h->def_regular = 1;
5259 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5260 writing = TRUE;
5261 if (htab->sfpr->contents == NULL)
5262 {
5263 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5264 if (htab->sfpr->contents == NULL)
5265 return FALSE;
5266 }
5267 }
5268 if (writing)
5269 {
5270 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5271 if (i != parm->hi)
5272 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5273 else
5274 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5275 htab->sfpr->size = p - htab->sfpr->contents;
5276 }
5277 }
5278
5279 return TRUE;
5280 }
5281
5282 static bfd_byte *
5283 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5284 {
5285 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5286 return p + 4;
5287 }
5288
5289 static bfd_byte *
5290 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5291 {
5292 p = savegpr0 (abfd, p, r);
5293 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5294 p = p + 4;
5295 bfd_put_32 (abfd, BLR, p);
5296 return p + 4;
5297 }
5298
5299 static bfd_byte *
5300 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5301 {
5302 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5303 return p + 4;
5304 }
5305
5306 static bfd_byte *
5307 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5308 {
5309 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5310 p = p + 4;
5311 p = restgpr0 (abfd, p, r);
5312 bfd_put_32 (abfd, MTLR_R0, p);
5313 p = p + 4;
5314 if (r == 29)
5315 {
5316 p = restgpr0 (abfd, p, 30);
5317 p = restgpr0 (abfd, p, 31);
5318 }
5319 bfd_put_32 (abfd, BLR, p);
5320 return p + 4;
5321 }
5322
5323 static bfd_byte *
5324 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5325 {
5326 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5327 return p + 4;
5328 }
5329
5330 static bfd_byte *
5331 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5332 {
5333 p = savegpr1 (abfd, p, r);
5334 bfd_put_32 (abfd, BLR, p);
5335 return p + 4;
5336 }
5337
5338 static bfd_byte *
5339 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5340 {
5341 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5342 return p + 4;
5343 }
5344
5345 static bfd_byte *
5346 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5347 {
5348 p = restgpr1 (abfd, p, r);
5349 bfd_put_32 (abfd, BLR, p);
5350 return p + 4;
5351 }
5352
5353 static bfd_byte *
5354 savefpr (bfd *abfd, bfd_byte *p, int r)
5355 {
5356 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5357 return p + 4;
5358 }
5359
5360 static bfd_byte *
5361 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5362 {
5363 p = savefpr (abfd, p, r);
5364 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5365 p = p + 4;
5366 bfd_put_32 (abfd, BLR, p);
5367 return p + 4;
5368 }
5369
5370 static bfd_byte *
5371 restfpr (bfd *abfd, bfd_byte *p, int r)
5372 {
5373 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5374 return p + 4;
5375 }
5376
5377 static bfd_byte *
5378 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5379 {
5380 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5381 p = p + 4;
5382 p = restfpr (abfd, p, r);
5383 bfd_put_32 (abfd, MTLR_R0, p);
5384 p = p + 4;
5385 if (r == 29)
5386 {
5387 p = restfpr (abfd, p, 30);
5388 p = restfpr (abfd, p, 31);
5389 }
5390 bfd_put_32 (abfd, BLR, p);
5391 return p + 4;
5392 }
5393
5394 static bfd_byte *
5395 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5396 {
5397 p = savefpr (abfd, p, r);
5398 bfd_put_32 (abfd, BLR, p);
5399 return p + 4;
5400 }
5401
5402 static bfd_byte *
5403 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5404 {
5405 p = restfpr (abfd, p, r);
5406 bfd_put_32 (abfd, BLR, p);
5407 return p + 4;
5408 }
5409
5410 static bfd_byte *
5411 savevr (bfd *abfd, bfd_byte *p, int r)
5412 {
5413 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5414 p = p + 4;
5415 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5416 return p + 4;
5417 }
5418
5419 static bfd_byte *
5420 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5421 {
5422 p = savevr (abfd, p, r);
5423 bfd_put_32 (abfd, BLR, p);
5424 return p + 4;
5425 }
5426
5427 static bfd_byte *
5428 restvr (bfd *abfd, bfd_byte *p, int r)
5429 {
5430 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5431 p = p + 4;
5432 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5433 return p + 4;
5434 }
5435
5436 static bfd_byte *
5437 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5438 {
5439 p = restvr (abfd, p, r);
5440 bfd_put_32 (abfd, BLR, p);
5441 return p + 4;
5442 }
5443
5444 /* Called via elf_link_hash_traverse to transfer dynamic linking
5445 information on function code symbol entries to their corresponding
5446 function descriptor symbol entries. */
5447
5448 static bfd_boolean
5449 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5450 {
5451 struct bfd_link_info *info;
5452 struct ppc_link_hash_table *htab;
5453 struct plt_entry *ent;
5454 struct ppc_link_hash_entry *fh;
5455 struct ppc_link_hash_entry *fdh;
5456 bfd_boolean force_local;
5457
5458 fh = (struct ppc_link_hash_entry *) h;
5459 if (fh->elf.root.type == bfd_link_hash_indirect)
5460 return TRUE;
5461
5462 if (fh->elf.root.type == bfd_link_hash_warning)
5463 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5464
5465 info = inf;
5466 htab = ppc_hash_table (info);
5467
5468 /* Resolve undefined references to dot-symbols as the value
5469 in the function descriptor, if we have one in a regular object.
5470 This is to satisfy cases like ".quad .foo". Calls to functions
5471 in dynamic objects are handled elsewhere. */
5472 if (fh->elf.root.type == bfd_link_hash_undefweak
5473 && fh->was_undefined
5474 && (fh->oh->elf.root.type == bfd_link_hash_defined
5475 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5476 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5477 && opd_entry_value (fh->oh->elf.root.u.def.section,
5478 fh->oh->elf.root.u.def.value,
5479 &fh->elf.root.u.def.section,
5480 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5481 {
5482 fh->elf.root.type = fh->oh->elf.root.type;
5483 fh->elf.forced_local = 1;
5484 }
5485
5486 /* If this is a function code symbol, transfer dynamic linking
5487 information to the function descriptor symbol. */
5488 if (!fh->is_func)
5489 return TRUE;
5490
5491 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5492 if (ent->plt.refcount > 0)
5493 break;
5494 if (ent == NULL
5495 || fh->elf.root.root.string[0] != '.'
5496 || fh->elf.root.root.string[1] == '\0')
5497 return TRUE;
5498
5499 /* Find the corresponding function descriptor symbol. Create it
5500 as undefined if necessary. */
5501
5502 fdh = get_fdh (fh, htab);
5503 if (fdh != NULL)
5504 while (fdh->elf.root.type == bfd_link_hash_indirect
5505 || fdh->elf.root.type == bfd_link_hash_warning)
5506 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5507
5508 if (fdh == NULL
5509 && info->shared
5510 && (fh->elf.root.type == bfd_link_hash_undefined
5511 || fh->elf.root.type == bfd_link_hash_undefweak))
5512 {
5513 fdh = make_fdh (info, fh);
5514 if (fdh == NULL)
5515 return FALSE;
5516 }
5517
5518 /* Fake function descriptors are made undefweak. If the function
5519 code symbol is strong undefined, make the fake sym the same.
5520 If the function code symbol is defined, then force the fake
5521 descriptor local; We can't support overriding of symbols in a
5522 shared library on a fake descriptor. */
5523
5524 if (fdh != NULL
5525 && fdh->fake
5526 && fdh->elf.root.type == bfd_link_hash_undefweak)
5527 {
5528 if (fh->elf.root.type == bfd_link_hash_undefined)
5529 {
5530 fdh->elf.root.type = bfd_link_hash_undefined;
5531 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5532 }
5533 else if (fh->elf.root.type == bfd_link_hash_defined
5534 || fh->elf.root.type == bfd_link_hash_defweak)
5535 {
5536 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5537 }
5538 }
5539
5540 if (fdh != NULL
5541 && !fdh->elf.forced_local
5542 && (info->shared
5543 || fdh->elf.def_dynamic
5544 || fdh->elf.ref_dynamic
5545 || (fdh->elf.root.type == bfd_link_hash_undefweak
5546 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5547 {
5548 if (fdh->elf.dynindx == -1)
5549 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5550 return FALSE;
5551 fdh->elf.ref_regular |= fh->elf.ref_regular;
5552 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5553 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5554 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5555 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5556 {
5557 move_plt_plist (fh, fdh);
5558 fdh->elf.needs_plt = 1;
5559 }
5560 fdh->is_func_descriptor = 1;
5561 fdh->oh = fh;
5562 fh->oh = fdh;
5563 }
5564
5565 /* Now that the info is on the function descriptor, clear the
5566 function code sym info. Any function code syms for which we
5567 don't have a definition in a regular file, we force local.
5568 This prevents a shared library from exporting syms that have
5569 been imported from another library. Function code syms that
5570 are really in the library we must leave global to prevent the
5571 linker dragging in a definition from a static library. */
5572 force_local = (!fh->elf.def_regular
5573 || fdh == NULL
5574 || !fdh->elf.def_regular
5575 || fdh->elf.forced_local);
5576 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5577
5578 return TRUE;
5579 }
5580
5581 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5582 this hook to a) provide some gcc support functions, and b) transfer
5583 dynamic linking information gathered so far on function code symbol
5584 entries, to their corresponding function descriptor symbol entries. */
5585
5586 static bfd_boolean
5587 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5588 struct bfd_link_info *info)
5589 {
5590 struct ppc_link_hash_table *htab;
5591 unsigned int i;
5592 const struct sfpr_def_parms funcs[] =
5593 {
5594 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5595 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5596 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5597 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5598 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5599 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5600 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5601 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5602 { "._savef", 14, 31, savefpr, savefpr1_tail },
5603 { "._restf", 14, 31, restfpr, restfpr1_tail },
5604 { "_savevr_", 20, 31, savevr, savevr_tail },
5605 { "_restvr_", 20, 31, restvr, restvr_tail }
5606 };
5607
5608 htab = ppc_hash_table (info);
5609 if (htab->sfpr == NULL)
5610 /* We don't have any relocs. */
5611 return TRUE;
5612
5613 /* Provide any missing _save* and _rest* functions. */
5614 htab->sfpr->size = 0;
5615 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5616 if (!sfpr_define (info, &funcs[i]))
5617 return FALSE;
5618
5619 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5620
5621 if (htab->sfpr->size == 0)
5622 htab->sfpr->flags |= SEC_EXCLUDE;
5623
5624 return TRUE;
5625 }
5626
5627 /* Adjust a symbol defined by a dynamic object and referenced by a
5628 regular object. The current definition is in some section of the
5629 dynamic object, but we're not including those sections. We have to
5630 change the definition to something the rest of the link can
5631 understand. */
5632
5633 static bfd_boolean
5634 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5635 struct elf_link_hash_entry *h)
5636 {
5637 struct ppc_link_hash_table *htab;
5638 asection *s;
5639 unsigned int power_of_two;
5640
5641 htab = ppc_hash_table (info);
5642
5643 /* Deal with function syms. */
5644 if (h->type == STT_FUNC
5645 || h->needs_plt)
5646 {
5647 /* Clear procedure linkage table information for any symbol that
5648 won't need a .plt entry. */
5649 struct plt_entry *ent;
5650 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5651 if (ent->plt.refcount > 0)
5652 break;
5653 if (ent == NULL
5654 || SYMBOL_CALLS_LOCAL (info, h)
5655 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5656 && h->root.type == bfd_link_hash_undefweak))
5657 {
5658 h->plt.plist = NULL;
5659 h->needs_plt = 0;
5660 }
5661 }
5662 else
5663 h->plt.plist = NULL;
5664
5665 /* If this is a weak symbol, and there is a real definition, the
5666 processor independent code will have arranged for us to see the
5667 real definition first, and we can just use the same value. */
5668 if (h->u.weakdef != NULL)
5669 {
5670 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5671 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5672 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5673 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5674 if (ELIMINATE_COPY_RELOCS)
5675 h->non_got_ref = h->u.weakdef->non_got_ref;
5676 return TRUE;
5677 }
5678
5679 /* If we are creating a shared library, we must presume that the
5680 only references to the symbol are via the global offset table.
5681 For such cases we need not do anything here; the relocations will
5682 be handled correctly by relocate_section. */
5683 if (info->shared)
5684 return TRUE;
5685
5686 /* If there are no references to this symbol that do not use the
5687 GOT, we don't need to generate a copy reloc. */
5688 if (!h->non_got_ref)
5689 return TRUE;
5690
5691 if (ELIMINATE_COPY_RELOCS)
5692 {
5693 struct ppc_link_hash_entry * eh;
5694 struct ppc_dyn_relocs *p;
5695
5696 eh = (struct ppc_link_hash_entry *) h;
5697 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5698 {
5699 s = p->sec->output_section;
5700 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5701 break;
5702 }
5703
5704 /* If we didn't find any dynamic relocs in read-only sections, then
5705 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5706 if (p == NULL)
5707 {
5708 h->non_got_ref = 0;
5709 return TRUE;
5710 }
5711 }
5712
5713 if (h->plt.plist != NULL)
5714 {
5715 /* We should never get here, but unfortunately there are versions
5716 of gcc out there that improperly (for this ABI) put initialized
5717 function pointers, vtable refs and suchlike in read-only
5718 sections. Allow them to proceed, but warn that this might
5719 break at runtime. */
5720 (*_bfd_error_handler)
5721 (_("copy reloc against `%s' requires lazy plt linking; "
5722 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5723 h->root.root.string);
5724 }
5725
5726 /* This is a reference to a symbol defined by a dynamic object which
5727 is not a function. */
5728
5729 if (h->size == 0)
5730 {
5731 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5732 h->root.root.string);
5733 return TRUE;
5734 }
5735
5736 /* We must allocate the symbol in our .dynbss section, which will
5737 become part of the .bss section of the executable. There will be
5738 an entry for this symbol in the .dynsym section. The dynamic
5739 object will contain position independent code, so all references
5740 from the dynamic object to this symbol will go through the global
5741 offset table. The dynamic linker will use the .dynsym entry to
5742 determine the address it must put in the global offset table, so
5743 both the dynamic object and the regular object will refer to the
5744 same memory location for the variable. */
5745
5746 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5747 to copy the initial value out of the dynamic object and into the
5748 runtime process image. We need to remember the offset into the
5749 .rela.bss section we are going to use. */
5750 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5751 {
5752 htab->relbss->size += sizeof (Elf64_External_Rela);
5753 h->needs_copy = 1;
5754 }
5755
5756 /* We need to figure out the alignment required for this symbol. I
5757 have no idea how ELF linkers handle this. */
5758 power_of_two = bfd_log2 (h->size);
5759 if (power_of_two > 4)
5760 power_of_two = 4;
5761
5762 /* Apply the required alignment. */
5763 s = htab->dynbss;
5764 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5765 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5766 {
5767 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5768 return FALSE;
5769 }
5770
5771 /* Define the symbol as being at this point in the section. */
5772 h->root.u.def.section = s;
5773 h->root.u.def.value = s->size;
5774
5775 /* Increment the section size to make room for the symbol. */
5776 s->size += h->size;
5777
5778 return TRUE;
5779 }
5780
5781 /* If given a function descriptor symbol, hide both the function code
5782 sym and the descriptor. */
5783 static void
5784 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5785 struct elf_link_hash_entry *h,
5786 bfd_boolean force_local)
5787 {
5788 struct ppc_link_hash_entry *eh;
5789 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5790
5791 eh = (struct ppc_link_hash_entry *) h;
5792 if (eh->is_func_descriptor)
5793 {
5794 struct ppc_link_hash_entry *fh = eh->oh;
5795
5796 if (fh == NULL)
5797 {
5798 const char *p, *q;
5799 struct ppc_link_hash_table *htab;
5800 char save;
5801
5802 /* We aren't supposed to use alloca in BFD because on
5803 systems which do not have alloca the version in libiberty
5804 calls xmalloc, which might cause the program to crash
5805 when it runs out of memory. This function doesn't have a
5806 return status, so there's no way to gracefully return an
5807 error. So cheat. We know that string[-1] can be safely
5808 accessed; It's either a string in an ELF string table,
5809 or allocated in an objalloc structure. */
5810
5811 p = eh->elf.root.root.string - 1;
5812 save = *p;
5813 *(char *) p = '.';
5814 htab = ppc_hash_table (info);
5815 fh = (struct ppc_link_hash_entry *)
5816 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5817 *(char *) p = save;
5818
5819 /* Unfortunately, if it so happens that the string we were
5820 looking for was allocated immediately before this string,
5821 then we overwrote the string terminator. That's the only
5822 reason the lookup should fail. */
5823 if (fh == NULL)
5824 {
5825 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5826 while (q >= eh->elf.root.root.string && *q == *p)
5827 --q, --p;
5828 if (q < eh->elf.root.root.string && *p == '.')
5829 fh = (struct ppc_link_hash_entry *)
5830 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5831 }
5832 if (fh != NULL)
5833 {
5834 eh->oh = fh;
5835 fh->oh = eh;
5836 }
5837 }
5838 if (fh != NULL)
5839 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5840 }
5841 }
5842
5843 static bfd_boolean
5844 get_sym_h (struct elf_link_hash_entry **hp,
5845 Elf_Internal_Sym **symp,
5846 asection **symsecp,
5847 char **tls_maskp,
5848 Elf_Internal_Sym **locsymsp,
5849 unsigned long r_symndx,
5850 bfd *ibfd)
5851 {
5852 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5853
5854 if (r_symndx >= symtab_hdr->sh_info)
5855 {
5856 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5857 struct elf_link_hash_entry *h;
5858
5859 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5860 while (h->root.type == bfd_link_hash_indirect
5861 || h->root.type == bfd_link_hash_warning)
5862 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5863
5864 if (hp != NULL)
5865 *hp = h;
5866
5867 if (symp != NULL)
5868 *symp = NULL;
5869
5870 if (symsecp != NULL)
5871 {
5872 asection *symsec = NULL;
5873 if (h->root.type == bfd_link_hash_defined
5874 || h->root.type == bfd_link_hash_defweak)
5875 symsec = h->root.u.def.section;
5876 *symsecp = symsec;
5877 }
5878
5879 if (tls_maskp != NULL)
5880 {
5881 struct ppc_link_hash_entry *eh;
5882
5883 eh = (struct ppc_link_hash_entry *) h;
5884 *tls_maskp = &eh->tls_mask;
5885 }
5886 }
5887 else
5888 {
5889 Elf_Internal_Sym *sym;
5890 Elf_Internal_Sym *locsyms = *locsymsp;
5891
5892 if (locsyms == NULL)
5893 {
5894 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5895 if (locsyms == NULL)
5896 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5897 symtab_hdr->sh_info,
5898 0, NULL, NULL, NULL);
5899 if (locsyms == NULL)
5900 return FALSE;
5901 *locsymsp = locsyms;
5902 }
5903 sym = locsyms + r_symndx;
5904
5905 if (hp != NULL)
5906 *hp = NULL;
5907
5908 if (symp != NULL)
5909 *symp = sym;
5910
5911 if (symsecp != NULL)
5912 {
5913 asection *symsec = NULL;
5914 if ((sym->st_shndx != SHN_UNDEF
5915 && sym->st_shndx < SHN_LORESERVE)
5916 || sym->st_shndx > SHN_HIRESERVE)
5917 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5918 *symsecp = symsec;
5919 }
5920
5921 if (tls_maskp != NULL)
5922 {
5923 struct got_entry **lgot_ents;
5924 char *tls_mask;
5925
5926 tls_mask = NULL;
5927 lgot_ents = elf_local_got_ents (ibfd);
5928 if (lgot_ents != NULL)
5929 {
5930 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5931 tls_mask = &lgot_masks[r_symndx];
5932 }
5933 *tls_maskp = tls_mask;
5934 }
5935 }
5936 return TRUE;
5937 }
5938
5939 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5940 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5941 type suitable for optimization, and 1 otherwise. */
5942
5943 static int
5944 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5945 Elf_Internal_Sym **locsymsp,
5946 const Elf_Internal_Rela *rel, bfd *ibfd)
5947 {
5948 unsigned long r_symndx;
5949 int next_r;
5950 struct elf_link_hash_entry *h;
5951 Elf_Internal_Sym *sym;
5952 asection *sec;
5953 bfd_vma off;
5954
5955 r_symndx = ELF64_R_SYM (rel->r_info);
5956 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5957 return 0;
5958
5959 if ((*tls_maskp != NULL && **tls_maskp != 0)
5960 || sec == NULL
5961 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5962 return 1;
5963
5964 /* Look inside a TOC section too. */
5965 if (h != NULL)
5966 {
5967 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5968 off = h->root.u.def.value;
5969 }
5970 else
5971 off = sym->st_value;
5972 off += rel->r_addend;
5973 BFD_ASSERT (off % 8 == 0);
5974 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5975 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5976 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5977 return 0;
5978 if (toc_symndx != NULL)
5979 *toc_symndx = r_symndx;
5980 if ((h == NULL
5981 || ((h->root.type == bfd_link_hash_defined
5982 || h->root.type == bfd_link_hash_defweak)
5983 && !h->def_dynamic))
5984 && (next_r == -1 || next_r == -2))
5985 return 1 - next_r;
5986 return 1;
5987 }
5988
5989 /* Adjust all global syms defined in opd sections. In gcc generated
5990 code for the old ABI, these will already have been done. */
5991
5992 static bfd_boolean
5993 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5994 {
5995 struct ppc_link_hash_entry *eh;
5996 asection *sym_sec;
5997 long *opd_adjust;
5998
5999 if (h->root.type == bfd_link_hash_indirect)
6000 return TRUE;
6001
6002 if (h->root.type == bfd_link_hash_warning)
6003 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6004
6005 if (h->root.type != bfd_link_hash_defined
6006 && h->root.type != bfd_link_hash_defweak)
6007 return TRUE;
6008
6009 eh = (struct ppc_link_hash_entry *) h;
6010 if (eh->adjust_done)
6011 return TRUE;
6012
6013 sym_sec = eh->elf.root.u.def.section;
6014 opd_adjust = get_opd_info (sym_sec);
6015 if (opd_adjust != NULL)
6016 {
6017 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6018 if (adjust == -1)
6019 {
6020 /* This entry has been deleted. */
6021 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6022 if (dsec == NULL)
6023 {
6024 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6025 if (elf_discarded_section (dsec))
6026 {
6027 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6028 break;
6029 }
6030 }
6031 eh->elf.root.u.def.value = 0;
6032 eh->elf.root.u.def.section = dsec;
6033 }
6034 else
6035 eh->elf.root.u.def.value += adjust;
6036 eh->adjust_done = 1;
6037 }
6038 return TRUE;
6039 }
6040
6041 /* Handles decrementing dynamic reloc counts for the reloc specified by
6042 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6043 have already been determined. */
6044
6045 static bfd_boolean
6046 dec_dynrel_count (bfd_vma r_info,
6047 asection *sec,
6048 struct bfd_link_info *info,
6049 Elf_Internal_Sym **local_syms,
6050 struct elf_link_hash_entry *h,
6051 asection *sym_sec)
6052 {
6053 enum elf_ppc64_reloc_type r_type;
6054 struct ppc_dyn_relocs *p;
6055 struct ppc_dyn_relocs **pp;
6056
6057 /* Can this reloc be dynamic? This switch, and later tests here
6058 should be kept in sync with the code in check_relocs. */
6059 r_type = ELF64_R_TYPE (r_info);
6060 switch (r_type)
6061 {
6062 default:
6063 return TRUE;
6064
6065 case R_PPC64_TPREL16:
6066 case R_PPC64_TPREL16_LO:
6067 case R_PPC64_TPREL16_HI:
6068 case R_PPC64_TPREL16_HA:
6069 case R_PPC64_TPREL16_DS:
6070 case R_PPC64_TPREL16_LO_DS:
6071 case R_PPC64_TPREL16_HIGHER:
6072 case R_PPC64_TPREL16_HIGHERA:
6073 case R_PPC64_TPREL16_HIGHEST:
6074 case R_PPC64_TPREL16_HIGHESTA:
6075 if (!info->shared)
6076 return TRUE;
6077
6078 case R_PPC64_TPREL64:
6079 case R_PPC64_DTPMOD64:
6080 case R_PPC64_DTPREL64:
6081 case R_PPC64_ADDR64:
6082 case R_PPC64_REL30:
6083 case R_PPC64_REL32:
6084 case R_PPC64_REL64:
6085 case R_PPC64_ADDR14:
6086 case R_PPC64_ADDR14_BRNTAKEN:
6087 case R_PPC64_ADDR14_BRTAKEN:
6088 case R_PPC64_ADDR16:
6089 case R_PPC64_ADDR16_DS:
6090 case R_PPC64_ADDR16_HA:
6091 case R_PPC64_ADDR16_HI:
6092 case R_PPC64_ADDR16_HIGHER:
6093 case R_PPC64_ADDR16_HIGHERA:
6094 case R_PPC64_ADDR16_HIGHEST:
6095 case R_PPC64_ADDR16_HIGHESTA:
6096 case R_PPC64_ADDR16_LO:
6097 case R_PPC64_ADDR16_LO_DS:
6098 case R_PPC64_ADDR24:
6099 case R_PPC64_ADDR32:
6100 case R_PPC64_UADDR16:
6101 case R_PPC64_UADDR32:
6102 case R_PPC64_UADDR64:
6103 case R_PPC64_TOC:
6104 break;
6105 }
6106
6107 if (local_syms != NULL)
6108 {
6109 unsigned long r_symndx;
6110 Elf_Internal_Sym *sym;
6111 bfd *ibfd = sec->owner;
6112
6113 r_symndx = ELF64_R_SYM (r_info);
6114 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6115 return FALSE;
6116 }
6117
6118 if ((info->shared
6119 && (MUST_BE_DYN_RELOC (r_type)
6120 || (h != NULL
6121 && (!info->symbolic
6122 || h->root.type == bfd_link_hash_defweak
6123 || !h->def_regular))))
6124 || (ELIMINATE_COPY_RELOCS
6125 && !info->shared
6126 && h != NULL
6127 && (h->root.type == bfd_link_hash_defweak
6128 || !h->def_regular)))
6129 ;
6130 else
6131 return TRUE;
6132
6133 if (h != NULL)
6134 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6135 else
6136 {
6137 if (sym_sec != NULL)
6138 {
6139 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6140 pp = (struct ppc_dyn_relocs **) vpp;
6141 }
6142 else
6143 {
6144 void *vpp = &elf_section_data (sec)->local_dynrel;
6145 pp = (struct ppc_dyn_relocs **) vpp;
6146 }
6147
6148 /* elf_gc_sweep may have already removed all dyn relocs associated
6149 with local syms for a given section. Don't report a dynreloc
6150 miscount. */
6151 if (*pp == NULL)
6152 return TRUE;
6153 }
6154
6155 while ((p = *pp) != NULL)
6156 {
6157 if (p->sec == sec)
6158 {
6159 if (!MUST_BE_DYN_RELOC (r_type))
6160 p->pc_count -= 1;
6161 p->count -= 1;
6162 if (p->count == 0)
6163 *pp = p->next;
6164 return TRUE;
6165 }
6166 pp = &p->next;
6167 }
6168
6169 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6170 sec->owner, sec);
6171 bfd_set_error (bfd_error_bad_value);
6172 return FALSE;
6173 }
6174
6175 /* Remove unused Official Procedure Descriptor entries. Currently we
6176 only remove those associated with functions in discarded link-once
6177 sections, or weakly defined functions that have been overridden. It
6178 would be possible to remove many more entries for statically linked
6179 applications. */
6180
6181 bfd_boolean
6182 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6183 bfd_boolean no_opd_opt,
6184 bfd_boolean non_overlapping)
6185 {
6186 bfd *ibfd;
6187 bfd_boolean some_edited = FALSE;
6188 asection *need_pad = NULL;
6189
6190 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6191 {
6192 asection *sec;
6193 Elf_Internal_Rela *relstart, *rel, *relend;
6194 Elf_Internal_Shdr *symtab_hdr;
6195 Elf_Internal_Sym *local_syms;
6196 struct elf_link_hash_entry **sym_hashes;
6197 bfd_vma offset;
6198 bfd_size_type amt;
6199 long *opd_adjust;
6200 bfd_boolean need_edit, add_aux_fields;
6201 bfd_size_type cnt_16b = 0;
6202
6203 sec = bfd_get_section_by_name (ibfd, ".opd");
6204 if (sec == NULL || sec->size == 0)
6205 continue;
6206
6207 amt = sec->size * sizeof (long) / 8;
6208 opd_adjust = get_opd_info (sec);
6209 if (opd_adjust == NULL)
6210 {
6211 /* check_relocs hasn't been called. Must be a ld -r link
6212 or --just-symbols object. */
6213 opd_adjust = bfd_alloc (obfd, amt);
6214 if (opd_adjust == NULL)
6215 return FALSE;
6216 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6217 }
6218 memset (opd_adjust, 0, amt);
6219
6220 if (no_opd_opt)
6221 continue;
6222
6223 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6224 continue;
6225
6226 if (sec->output_section == bfd_abs_section_ptr)
6227 continue;
6228
6229 /* Look through the section relocs. */
6230 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6231 continue;
6232
6233 local_syms = NULL;
6234 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6235 sym_hashes = elf_sym_hashes (ibfd);
6236
6237 /* Read the relocations. */
6238 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6239 info->keep_memory);
6240 if (relstart == NULL)
6241 return FALSE;
6242
6243 /* First run through the relocs to check they are sane, and to
6244 determine whether we need to edit this opd section. */
6245 need_edit = FALSE;
6246 need_pad = sec;
6247 offset = 0;
6248 relend = relstart + sec->reloc_count;
6249 for (rel = relstart; rel < relend; )
6250 {
6251 enum elf_ppc64_reloc_type r_type;
6252 unsigned long r_symndx;
6253 asection *sym_sec;
6254 struct elf_link_hash_entry *h;
6255 Elf_Internal_Sym *sym;
6256
6257 /* .opd contains a regular array of 16 or 24 byte entries. We're
6258 only interested in the reloc pointing to a function entry
6259 point. */
6260 if (rel->r_offset != offset
6261 || rel + 1 >= relend
6262 || (rel + 1)->r_offset != offset + 8)
6263 {
6264 /* If someone messes with .opd alignment then after a
6265 "ld -r" we might have padding in the middle of .opd.
6266 Also, there's nothing to prevent someone putting
6267 something silly in .opd with the assembler. No .opd
6268 optimization for them! */
6269 broken_opd:
6270 (*_bfd_error_handler)
6271 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6272 need_edit = FALSE;
6273 break;
6274 }
6275
6276 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6277 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6278 {
6279 (*_bfd_error_handler)
6280 (_("%B: unexpected reloc type %u in .opd section"),
6281 ibfd, r_type);
6282 need_edit = FALSE;
6283 break;
6284 }
6285
6286 r_symndx = ELF64_R_SYM (rel->r_info);
6287 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6288 r_symndx, ibfd))
6289 goto error_ret;
6290
6291 if (sym_sec == NULL || sym_sec->owner == NULL)
6292 {
6293 const char *sym_name;
6294 if (h != NULL)
6295 sym_name = h->root.root.string;
6296 else
6297 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6298 sym_sec);
6299
6300 (*_bfd_error_handler)
6301 (_("%B: undefined sym `%s' in .opd section"),
6302 ibfd, sym_name);
6303 need_edit = FALSE;
6304 break;
6305 }
6306
6307 /* opd entries are always for functions defined in the
6308 current input bfd. If the symbol isn't defined in the
6309 input bfd, then we won't be using the function in this
6310 bfd; It must be defined in a linkonce section in another
6311 bfd, or is weak. It's also possible that we are
6312 discarding the function due to a linker script /DISCARD/,
6313 which we test for via the output_section. */
6314 if (sym_sec->owner != ibfd
6315 || sym_sec->output_section == bfd_abs_section_ptr)
6316 need_edit = TRUE;
6317
6318 rel += 2;
6319 if (rel == relend
6320 || (rel + 1 == relend && rel->r_offset == offset + 16))
6321 {
6322 if (sec->size == offset + 24)
6323 {
6324 need_pad = NULL;
6325 break;
6326 }
6327 if (rel == relend && sec->size == offset + 16)
6328 {
6329 cnt_16b++;
6330 break;
6331 }
6332 goto broken_opd;
6333 }
6334
6335 if (rel->r_offset == offset + 24)
6336 offset += 24;
6337 else if (rel->r_offset != offset + 16)
6338 goto broken_opd;
6339 else if (rel + 1 < relend
6340 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6341 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6342 {
6343 offset += 16;
6344 cnt_16b++;
6345 }
6346 else if (rel + 2 < relend
6347 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6348 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6349 {
6350 offset += 24;
6351 rel += 1;
6352 }
6353 else
6354 goto broken_opd;
6355 }
6356
6357 add_aux_fields = non_overlapping && cnt_16b > 0;
6358
6359 if (need_edit || add_aux_fields)
6360 {
6361 Elf_Internal_Rela *write_rel;
6362 bfd_byte *rptr, *wptr;
6363 bfd_byte *new_contents = NULL;
6364 bfd_boolean skip;
6365 long opd_ent_size;
6366
6367 /* This seems a waste of time as input .opd sections are all
6368 zeros as generated by gcc, but I suppose there's no reason
6369 this will always be so. We might start putting something in
6370 the third word of .opd entries. */
6371 if ((sec->flags & SEC_IN_MEMORY) == 0)
6372 {
6373 bfd_byte *loc;
6374 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6375 {
6376 if (loc != NULL)
6377 free (loc);
6378 error_ret:
6379 if (local_syms != NULL
6380 && symtab_hdr->contents != (unsigned char *) local_syms)
6381 free (local_syms);
6382 if (elf_section_data (sec)->relocs != relstart)
6383 free (relstart);
6384 return FALSE;
6385 }
6386 sec->contents = loc;
6387 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6388 }
6389
6390 elf_section_data (sec)->relocs = relstart;
6391
6392 new_contents = sec->contents;
6393 if (add_aux_fields)
6394 {
6395 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6396 if (new_contents == NULL)
6397 return FALSE;
6398 need_pad = FALSE;
6399 }
6400 wptr = new_contents;
6401 rptr = sec->contents;
6402
6403 write_rel = relstart;
6404 skip = FALSE;
6405 offset = 0;
6406 opd_ent_size = 0;
6407 for (rel = relstart; rel < relend; rel++)
6408 {
6409 unsigned long r_symndx;
6410 asection *sym_sec;
6411 struct elf_link_hash_entry *h;
6412 Elf_Internal_Sym *sym;
6413
6414 r_symndx = ELF64_R_SYM (rel->r_info);
6415 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6416 r_symndx, ibfd))
6417 goto error_ret;
6418
6419 if (rel->r_offset == offset)
6420 {
6421 struct ppc_link_hash_entry *fdh = NULL;
6422
6423 /* See if the .opd entry is full 24 byte or
6424 16 byte (with fd_aux entry overlapped with next
6425 fd_func). */
6426 opd_ent_size = 24;
6427 if ((rel + 2 == relend && sec->size == offset + 16)
6428 || (rel + 3 < relend
6429 && rel[2].r_offset == offset + 16
6430 && rel[3].r_offset == offset + 24
6431 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6432 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6433 opd_ent_size = 16;
6434
6435 if (h != NULL
6436 && h->root.root.string[0] == '.')
6437 {
6438 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6439 ppc_hash_table (info));
6440 if (fdh != NULL
6441 && fdh->elf.root.type != bfd_link_hash_defined
6442 && fdh->elf.root.type != bfd_link_hash_defweak)
6443 fdh = NULL;
6444 }
6445
6446 skip = (sym_sec->owner != ibfd
6447 || sym_sec->output_section == bfd_abs_section_ptr);
6448 if (skip)
6449 {
6450 if (fdh != NULL && sym_sec->owner == ibfd)
6451 {
6452 /* Arrange for the function descriptor sym
6453 to be dropped. */
6454 fdh->elf.root.u.def.value = 0;
6455 fdh->elf.root.u.def.section = sym_sec;
6456 }
6457 opd_adjust[rel->r_offset / 8] = -1;
6458 }
6459 else
6460 {
6461 /* We'll be keeping this opd entry. */
6462
6463 if (fdh != NULL)
6464 {
6465 /* Redefine the function descriptor symbol to
6466 this location in the opd section. It is
6467 necessary to update the value here rather
6468 than using an array of adjustments as we do
6469 for local symbols, because various places
6470 in the generic ELF code use the value
6471 stored in u.def.value. */
6472 fdh->elf.root.u.def.value = wptr - new_contents;
6473 fdh->adjust_done = 1;
6474 }
6475
6476 /* Local syms are a bit tricky. We could
6477 tweak them as they can be cached, but
6478 we'd need to look through the local syms
6479 for the function descriptor sym which we
6480 don't have at the moment. So keep an
6481 array of adjustments. */
6482 opd_adjust[rel->r_offset / 8]
6483 = (wptr - new_contents) - (rptr - sec->contents);
6484
6485 if (wptr != rptr)
6486 memcpy (wptr, rptr, opd_ent_size);
6487 wptr += opd_ent_size;
6488 if (add_aux_fields && opd_ent_size == 16)
6489 {
6490 memset (wptr, '\0', 8);
6491 wptr += 8;
6492 }
6493 }
6494 rptr += opd_ent_size;
6495 offset += opd_ent_size;
6496 }
6497
6498 if (skip)
6499 {
6500 if (!NO_OPD_RELOCS
6501 && !info->relocatable
6502 && !dec_dynrel_count (rel->r_info, sec, info,
6503 NULL, h, sym_sec))
6504 goto error_ret;
6505 }
6506 else
6507 {
6508 /* We need to adjust any reloc offsets to point to the
6509 new opd entries. While we're at it, we may as well
6510 remove redundant relocs. */
6511 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6512 if (write_rel != rel)
6513 memcpy (write_rel, rel, sizeof (*rel));
6514 ++write_rel;
6515 }
6516 }
6517
6518 sec->size = wptr - new_contents;
6519 sec->reloc_count = write_rel - relstart;
6520 if (add_aux_fields)
6521 {
6522 free (sec->contents);
6523 sec->contents = new_contents;
6524 }
6525
6526 /* Fudge the size too, as this is used later in
6527 elf_bfd_final_link if we are emitting relocs. */
6528 elf_section_data (sec)->rel_hdr.sh_size
6529 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6530 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6531 some_edited = TRUE;
6532 }
6533 else if (elf_section_data (sec)->relocs != relstart)
6534 free (relstart);
6535
6536 if (local_syms != NULL
6537 && symtab_hdr->contents != (unsigned char *) local_syms)
6538 {
6539 if (!info->keep_memory)
6540 free (local_syms);
6541 else
6542 symtab_hdr->contents = (unsigned char *) local_syms;
6543 }
6544 }
6545
6546 if (some_edited)
6547 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6548
6549 /* If we are doing a final link and the last .opd entry is just 16 byte
6550 long, add a 8 byte padding after it. */
6551 if (need_pad != NULL && !info->relocatable)
6552 {
6553 bfd_byte *p;
6554
6555 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6556 {
6557 BFD_ASSERT (need_pad->size > 0);
6558
6559 p = bfd_malloc (need_pad->size + 8);
6560 if (p == NULL)
6561 return FALSE;
6562
6563 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6564 p, 0, need_pad->size))
6565 return FALSE;
6566
6567 need_pad->contents = p;
6568 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6569 }
6570 else
6571 {
6572 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6573 if (p == NULL)
6574 return FALSE;
6575
6576 need_pad->contents = p;
6577 }
6578
6579 memset (need_pad->contents + need_pad->size, 0, 8);
6580 need_pad->size += 8;
6581 }
6582
6583 return TRUE;
6584 }
6585
6586 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6587
6588 asection *
6589 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6590 {
6591 struct ppc_link_hash_table *htab;
6592
6593 htab = ppc_hash_table (info);
6594 if (htab->tls_get_addr != NULL)
6595 {
6596 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6597
6598 while (h->elf.root.type == bfd_link_hash_indirect
6599 || h->elf.root.type == bfd_link_hash_warning)
6600 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6601
6602 htab->tls_get_addr = h;
6603
6604 if (htab->tls_get_addr_fd == NULL
6605 && h->oh != NULL
6606 && h->oh->is_func_descriptor
6607 && (h->oh->elf.root.type == bfd_link_hash_defined
6608 || h->oh->elf.root.type == bfd_link_hash_defweak))
6609 htab->tls_get_addr_fd = h->oh;
6610 }
6611
6612 if (htab->tls_get_addr_fd != NULL)
6613 {
6614 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6615
6616 while (h->elf.root.type == bfd_link_hash_indirect
6617 || h->elf.root.type == bfd_link_hash_warning)
6618 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6619
6620 htab->tls_get_addr_fd = h;
6621 }
6622
6623 return _bfd_elf_tls_setup (obfd, info);
6624 }
6625
6626 /* Run through all the TLS relocs looking for optimization
6627 opportunities. The linker has been hacked (see ppc64elf.em) to do
6628 a preliminary section layout so that we know the TLS segment
6629 offsets. We can't optimize earlier because some optimizations need
6630 to know the tp offset, and we need to optimize before allocating
6631 dynamic relocations. */
6632
6633 bfd_boolean
6634 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6635 {
6636 bfd *ibfd;
6637 asection *sec;
6638 struct ppc_link_hash_table *htab;
6639
6640 if (info->relocatable || info->shared)
6641 return TRUE;
6642
6643 htab = ppc_hash_table (info);
6644 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6645 {
6646 Elf_Internal_Sym *locsyms = NULL;
6647
6648 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6649 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6650 {
6651 Elf_Internal_Rela *relstart, *rel, *relend;
6652 int expecting_tls_get_addr;
6653
6654 /* Read the relocations. */
6655 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6656 info->keep_memory);
6657 if (relstart == NULL)
6658 return FALSE;
6659
6660 expecting_tls_get_addr = 0;
6661 relend = relstart + sec->reloc_count;
6662 for (rel = relstart; rel < relend; rel++)
6663 {
6664 enum elf_ppc64_reloc_type r_type;
6665 unsigned long r_symndx;
6666 struct elf_link_hash_entry *h;
6667 Elf_Internal_Sym *sym;
6668 asection *sym_sec;
6669 char *tls_mask;
6670 char tls_set, tls_clear, tls_type = 0;
6671 bfd_vma value;
6672 bfd_boolean ok_tprel, is_local;
6673
6674 r_symndx = ELF64_R_SYM (rel->r_info);
6675 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6676 r_symndx, ibfd))
6677 {
6678 err_free_rel:
6679 if (elf_section_data (sec)->relocs != relstart)
6680 free (relstart);
6681 if (locsyms != NULL
6682 && (elf_tdata (ibfd)->symtab_hdr.contents
6683 != (unsigned char *) locsyms))
6684 free (locsyms);
6685 return FALSE;
6686 }
6687
6688 if (h != NULL)
6689 {
6690 if (h->root.type != bfd_link_hash_defined
6691 && h->root.type != bfd_link_hash_defweak)
6692 continue;
6693 value = h->root.u.def.value;
6694 }
6695 else
6696 /* Symbols referenced by TLS relocs must be of type
6697 STT_TLS. So no need for .opd local sym adjust. */
6698 value = sym->st_value;
6699
6700 ok_tprel = FALSE;
6701 is_local = FALSE;
6702 if (h == NULL
6703 || !h->def_dynamic)
6704 {
6705 is_local = TRUE;
6706 value += sym_sec->output_offset;
6707 value += sym_sec->output_section->vma;
6708 value -= htab->elf.tls_sec->vma;
6709 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6710 < (bfd_vma) 1 << 32);
6711 }
6712
6713 r_type = ELF64_R_TYPE (rel->r_info);
6714 switch (r_type)
6715 {
6716 case R_PPC64_GOT_TLSLD16:
6717 case R_PPC64_GOT_TLSLD16_LO:
6718 case R_PPC64_GOT_TLSLD16_HI:
6719 case R_PPC64_GOT_TLSLD16_HA:
6720 /* These relocs should never be against a symbol
6721 defined in a shared lib. Leave them alone if
6722 that turns out to be the case. */
6723 ppc64_tlsld_got (ibfd)->refcount -= 1;
6724 if (!is_local)
6725 continue;
6726
6727 /* LD -> LE */
6728 tls_set = 0;
6729 tls_clear = TLS_LD;
6730 tls_type = TLS_TLS | TLS_LD;
6731 expecting_tls_get_addr = 1;
6732 break;
6733
6734 case R_PPC64_GOT_TLSGD16:
6735 case R_PPC64_GOT_TLSGD16_LO:
6736 case R_PPC64_GOT_TLSGD16_HI:
6737 case R_PPC64_GOT_TLSGD16_HA:
6738 if (ok_tprel)
6739 /* GD -> LE */
6740 tls_set = 0;
6741 else
6742 /* GD -> IE */
6743 tls_set = TLS_TLS | TLS_TPRELGD;
6744 tls_clear = TLS_GD;
6745 tls_type = TLS_TLS | TLS_GD;
6746 expecting_tls_get_addr = 1;
6747 break;
6748
6749 case R_PPC64_GOT_TPREL16_DS:
6750 case R_PPC64_GOT_TPREL16_LO_DS:
6751 case R_PPC64_GOT_TPREL16_HI:
6752 case R_PPC64_GOT_TPREL16_HA:
6753 expecting_tls_get_addr = 0;
6754 if (ok_tprel)
6755 {
6756 /* IE -> LE */
6757 tls_set = 0;
6758 tls_clear = TLS_TPREL;
6759 tls_type = TLS_TLS | TLS_TPREL;
6760 break;
6761 }
6762 else
6763 continue;
6764
6765 case R_PPC64_REL14:
6766 case R_PPC64_REL14_BRTAKEN:
6767 case R_PPC64_REL14_BRNTAKEN:
6768 case R_PPC64_REL24:
6769 if (h != NULL
6770 && (h == &htab->tls_get_addr->elf
6771 || h == &htab->tls_get_addr_fd->elf))
6772 {
6773 if (!expecting_tls_get_addr
6774 && rel != relstart
6775 && ((ELF64_R_TYPE (rel[-1].r_info)
6776 == R_PPC64_TOC16)
6777 || (ELF64_R_TYPE (rel[-1].r_info)
6778 == R_PPC64_TOC16_LO)))
6779 {
6780 /* Check for toc tls entries. */
6781 char *toc_tls;
6782 int retval;
6783
6784 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6785 rel - 1, ibfd);
6786 if (retval == 0)
6787 goto err_free_rel;
6788 if (toc_tls != NULL)
6789 expecting_tls_get_addr = retval > 1;
6790 }
6791
6792 if (expecting_tls_get_addr)
6793 {
6794 struct plt_entry *ent;
6795 for (ent = h->plt.plist; ent; ent = ent->next)
6796 if (ent->addend == 0)
6797 {
6798 if (ent->plt.refcount > 0)
6799 ent->plt.refcount -= 1;
6800 break;
6801 }
6802 }
6803 }
6804 expecting_tls_get_addr = 0;
6805 continue;
6806
6807 case R_PPC64_TPREL64:
6808 expecting_tls_get_addr = 0;
6809 if (ok_tprel)
6810 {
6811 /* IE -> LE */
6812 tls_set = TLS_EXPLICIT;
6813 tls_clear = TLS_TPREL;
6814 break;
6815 }
6816 else
6817 continue;
6818
6819 case R_PPC64_DTPMOD64:
6820 expecting_tls_get_addr = 0;
6821 if (rel + 1 < relend
6822 && (rel[1].r_info
6823 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6824 && rel[1].r_offset == rel->r_offset + 8)
6825 {
6826 if (ok_tprel)
6827 /* GD -> LE */
6828 tls_set = TLS_EXPLICIT | TLS_GD;
6829 else
6830 /* GD -> IE */
6831 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6832 tls_clear = TLS_GD;
6833 }
6834 else
6835 {
6836 if (!is_local)
6837 continue;
6838
6839 /* LD -> LE */
6840 tls_set = TLS_EXPLICIT;
6841 tls_clear = TLS_LD;
6842 }
6843 break;
6844
6845 default:
6846 expecting_tls_get_addr = 0;
6847 continue;
6848 }
6849
6850 if ((tls_set & TLS_EXPLICIT) == 0)
6851 {
6852 struct got_entry *ent;
6853
6854 /* Adjust got entry for this reloc. */
6855 if (h != NULL)
6856 ent = h->got.glist;
6857 else
6858 ent = elf_local_got_ents (ibfd)[r_symndx];
6859
6860 for (; ent != NULL; ent = ent->next)
6861 if (ent->addend == rel->r_addend
6862 && ent->owner == ibfd
6863 && ent->tls_type == tls_type)
6864 break;
6865 if (ent == NULL)
6866 abort ();
6867
6868 if (tls_set == 0)
6869 {
6870 /* We managed to get rid of a got entry. */
6871 if (ent->got.refcount > 0)
6872 ent->got.refcount -= 1;
6873 }
6874 }
6875 else
6876 {
6877 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6878 we'll lose one or two dyn relocs. */
6879 if (!dec_dynrel_count (rel->r_info, sec, info,
6880 NULL, h, sym_sec))
6881 return FALSE;
6882
6883 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6884 {
6885 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6886 NULL, h, sym_sec))
6887 return FALSE;
6888 }
6889 }
6890
6891 *tls_mask |= tls_set;
6892 *tls_mask &= ~tls_clear;
6893 }
6894
6895 if (elf_section_data (sec)->relocs != relstart)
6896 free (relstart);
6897 }
6898
6899 if (locsyms != NULL
6900 && (elf_tdata (ibfd)->symtab_hdr.contents
6901 != (unsigned char *) locsyms))
6902 {
6903 if (!info->keep_memory)
6904 free (locsyms);
6905 else
6906 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6907 }
6908 }
6909 return TRUE;
6910 }
6911
6912 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6913 the values of any global symbols in a toc section that has been
6914 edited. Globals in toc sections should be a rarity, so this function
6915 sets a flag if any are found in toc sections other than the one just
6916 edited, so that futher hash table traversals can be avoided. */
6917
6918 struct adjust_toc_info
6919 {
6920 asection *toc;
6921 unsigned long *skip;
6922 bfd_boolean global_toc_syms;
6923 };
6924
6925 static bfd_boolean
6926 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6927 {
6928 struct ppc_link_hash_entry *eh;
6929 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6930
6931 if (h->root.type == bfd_link_hash_indirect)
6932 return TRUE;
6933
6934 if (h->root.type == bfd_link_hash_warning)
6935 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6936
6937 if (h->root.type != bfd_link_hash_defined
6938 && h->root.type != bfd_link_hash_defweak)
6939 return TRUE;
6940
6941 eh = (struct ppc_link_hash_entry *) h;
6942 if (eh->adjust_done)
6943 return TRUE;
6944
6945 if (eh->elf.root.u.def.section == toc_inf->toc)
6946 {
6947 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6948 if (skip != (unsigned long) -1)
6949 eh->elf.root.u.def.value -= skip;
6950 else
6951 {
6952 (*_bfd_error_handler)
6953 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6954 eh->elf.root.u.def.section = &bfd_abs_section;
6955 eh->elf.root.u.def.value = 0;
6956 }
6957 eh->adjust_done = 1;
6958 }
6959 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6960 toc_inf->global_toc_syms = TRUE;
6961
6962 return TRUE;
6963 }
6964
6965 /* Examine all relocs referencing .toc sections in order to remove
6966 unused .toc entries. */
6967
6968 bfd_boolean
6969 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6970 {
6971 bfd *ibfd;
6972 struct adjust_toc_info toc_inf;
6973
6974 toc_inf.global_toc_syms = TRUE;
6975 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6976 {
6977 asection *toc, *sec;
6978 Elf_Internal_Shdr *symtab_hdr;
6979 Elf_Internal_Sym *local_syms;
6980 struct elf_link_hash_entry **sym_hashes;
6981 Elf_Internal_Rela *relstart, *rel;
6982 unsigned long *skip, *drop;
6983 unsigned char *used;
6984 unsigned char *keep, last, some_unused;
6985
6986 toc = bfd_get_section_by_name (ibfd, ".toc");
6987 if (toc == NULL
6988 || toc->size == 0
6989 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6990 || elf_discarded_section (toc))
6991 continue;
6992
6993 local_syms = NULL;
6994 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6995 sym_hashes = elf_sym_hashes (ibfd);
6996
6997 /* Look at sections dropped from the final link. */
6998 skip = NULL;
6999 relstart = NULL;
7000 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7001 {
7002 if (sec->reloc_count == 0
7003 || !elf_discarded_section (sec)
7004 || get_opd_info (sec)
7005 || (sec->flags & SEC_ALLOC) == 0
7006 || (sec->flags & SEC_DEBUGGING) != 0)
7007 continue;
7008
7009 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7010 if (relstart == NULL)
7011 goto error_ret;
7012
7013 /* Run through the relocs to see which toc entries might be
7014 unused. */
7015 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7016 {
7017 enum elf_ppc64_reloc_type r_type;
7018 unsigned long r_symndx;
7019 asection *sym_sec;
7020 struct elf_link_hash_entry *h;
7021 Elf_Internal_Sym *sym;
7022 bfd_vma val;
7023
7024 r_type = ELF64_R_TYPE (rel->r_info);
7025 switch (r_type)
7026 {
7027 default:
7028 continue;
7029
7030 case R_PPC64_TOC16:
7031 case R_PPC64_TOC16_LO:
7032 case R_PPC64_TOC16_HI:
7033 case R_PPC64_TOC16_HA:
7034 case R_PPC64_TOC16_DS:
7035 case R_PPC64_TOC16_LO_DS:
7036 break;
7037 }
7038
7039 r_symndx = ELF64_R_SYM (rel->r_info);
7040 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7041 r_symndx, ibfd))
7042 goto error_ret;
7043
7044 if (sym_sec != toc)
7045 continue;
7046
7047 if (h != NULL)
7048 val = h->root.u.def.value;
7049 else
7050 val = sym->st_value;
7051 val += rel->r_addend;
7052
7053 if (val >= toc->size)
7054 continue;
7055
7056 /* Anything in the toc ought to be aligned to 8 bytes.
7057 If not, don't mark as unused. */
7058 if (val & 7)
7059 continue;
7060
7061 if (skip == NULL)
7062 {
7063 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7064 if (skip == NULL)
7065 goto error_ret;
7066 }
7067
7068 skip[val >> 3] = 1;
7069 }
7070
7071 if (elf_section_data (sec)->relocs != relstart)
7072 free (relstart);
7073 }
7074
7075 if (skip == NULL)
7076 continue;
7077
7078 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7079 if (used == NULL)
7080 {
7081 error_ret:
7082 if (local_syms != NULL
7083 && symtab_hdr->contents != (unsigned char *) local_syms)
7084 free (local_syms);
7085 if (sec != NULL
7086 && relstart != NULL
7087 && elf_section_data (sec)->relocs != relstart)
7088 free (relstart);
7089 if (skip != NULL)
7090 free (skip);
7091 return FALSE;
7092 }
7093
7094 /* Now check all kept sections that might reference the toc. */
7095 for (sec = ibfd->sections;
7096 sec != NULL;
7097 /* Check the toc itself last. */
7098 sec = (sec == toc ? NULL
7099 : sec->next == toc && sec->next->next ? sec->next->next
7100 : sec->next == NULL ? toc
7101 : sec->next))
7102 {
7103 int repeat;
7104
7105 if (sec->reloc_count == 0
7106 || elf_discarded_section (sec)
7107 || get_opd_info (sec)
7108 || (sec->flags & SEC_ALLOC) == 0
7109 || (sec->flags & SEC_DEBUGGING) != 0)
7110 continue;
7111
7112 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7113 if (relstart == NULL)
7114 goto error_ret;
7115
7116 /* Mark toc entries referenced as used. */
7117 repeat = 0;
7118 do
7119 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7120 {
7121 enum elf_ppc64_reloc_type r_type;
7122 unsigned long r_symndx;
7123 asection *sym_sec;
7124 struct elf_link_hash_entry *h;
7125 Elf_Internal_Sym *sym;
7126 bfd_vma val;
7127
7128 r_type = ELF64_R_TYPE (rel->r_info);
7129 switch (r_type)
7130 {
7131 case R_PPC64_TOC16:
7132 case R_PPC64_TOC16_LO:
7133 case R_PPC64_TOC16_HI:
7134 case R_PPC64_TOC16_HA:
7135 case R_PPC64_TOC16_DS:
7136 case R_PPC64_TOC16_LO_DS:
7137 /* In case we're taking addresses of toc entries. */
7138 case R_PPC64_ADDR64:
7139 break;
7140
7141 default:
7142 continue;
7143 }
7144
7145 r_symndx = ELF64_R_SYM (rel->r_info);
7146 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7147 r_symndx, ibfd))
7148 {
7149 free (used);
7150 goto error_ret;
7151 }
7152
7153 if (sym_sec != toc)
7154 continue;
7155
7156 if (h != NULL)
7157 val = h->root.u.def.value;
7158 else
7159 val = sym->st_value;
7160 val += rel->r_addend;
7161
7162 if (val >= toc->size)
7163 continue;
7164
7165 /* For the toc section, we only mark as used if
7166 this entry itself isn't unused. */
7167 if (sec == toc
7168 && !used[val >> 3]
7169 && (used[rel->r_offset >> 3]
7170 || !skip[rel->r_offset >> 3]))
7171 /* Do all the relocs again, to catch reference
7172 chains. */
7173 repeat = 1;
7174
7175 used[val >> 3] = 1;
7176 }
7177 while (repeat);
7178 }
7179
7180 /* Merge the used and skip arrays. Assume that TOC
7181 doublewords not appearing as either used or unused belong
7182 to to an entry more than one doubleword in size. */
7183 for (drop = skip, keep = used, last = 0, some_unused = 0;
7184 drop < skip + (toc->size + 7) / 8;
7185 ++drop, ++keep)
7186 {
7187 if (*keep)
7188 {
7189 *drop = 0;
7190 last = 0;
7191 }
7192 else if (*drop)
7193 {
7194 some_unused = 1;
7195 last = 1;
7196 }
7197 else
7198 *drop = last;
7199 }
7200
7201 free (used);
7202
7203 if (some_unused)
7204 {
7205 bfd_byte *contents, *src;
7206 unsigned long off;
7207
7208 /* Shuffle the toc contents, and at the same time convert the
7209 skip array from booleans into offsets. */
7210 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7211 goto error_ret;
7212
7213 elf_section_data (toc)->this_hdr.contents = contents;
7214
7215 for (src = contents, off = 0, drop = skip;
7216 src < contents + toc->size;
7217 src += 8, ++drop)
7218 {
7219 if (*drop)
7220 {
7221 *drop = (unsigned long) -1;
7222 off += 8;
7223 }
7224 else if (off != 0)
7225 {
7226 *drop = off;
7227 memcpy (src - off, src, 8);
7228 }
7229 }
7230 toc->rawsize = toc->size;
7231 toc->size = src - contents - off;
7232
7233 if (toc->reloc_count != 0)
7234 {
7235 Elf_Internal_Rela *wrel;
7236 bfd_size_type sz;
7237
7238 /* Read toc relocs. */
7239 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7240 TRUE);
7241 if (relstart == NULL)
7242 goto error_ret;
7243
7244 /* Remove unused toc relocs, and adjust those we keep. */
7245 wrel = relstart;
7246 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7247 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7248 {
7249 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7250 wrel->r_info = rel->r_info;
7251 wrel->r_addend = rel->r_addend;
7252 ++wrel;
7253 }
7254 else if (!dec_dynrel_count (rel->r_info, toc, info,
7255 &local_syms, NULL, NULL))
7256 goto error_ret;
7257
7258 toc->reloc_count = wrel - relstart;
7259 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7260 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7261 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7262 }
7263
7264 /* Adjust addends for relocs against the toc section sym. */
7265 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7266 {
7267 if (sec->reloc_count == 0
7268 || elf_discarded_section (sec))
7269 continue;
7270
7271 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7272 TRUE);
7273 if (relstart == NULL)
7274 goto error_ret;
7275
7276 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7277 {
7278 enum elf_ppc64_reloc_type r_type;
7279 unsigned long r_symndx;
7280 asection *sym_sec;
7281 struct elf_link_hash_entry *h;
7282 Elf_Internal_Sym *sym;
7283
7284 r_type = ELF64_R_TYPE (rel->r_info);
7285 switch (r_type)
7286 {
7287 default:
7288 continue;
7289
7290 case R_PPC64_TOC16:
7291 case R_PPC64_TOC16_LO:
7292 case R_PPC64_TOC16_HI:
7293 case R_PPC64_TOC16_HA:
7294 case R_PPC64_TOC16_DS:
7295 case R_PPC64_TOC16_LO_DS:
7296 case R_PPC64_ADDR64:
7297 break;
7298 }
7299
7300 r_symndx = ELF64_R_SYM (rel->r_info);
7301 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7302 r_symndx, ibfd))
7303 goto error_ret;
7304
7305 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7306 continue;
7307
7308 rel->r_addend -= skip[rel->r_addend >> 3];
7309 }
7310 }
7311
7312 /* We shouldn't have local or global symbols defined in the TOC,
7313 but handle them anyway. */
7314 if (local_syms != NULL)
7315 {
7316 Elf_Internal_Sym *sym;
7317
7318 for (sym = local_syms;
7319 sym < local_syms + symtab_hdr->sh_info;
7320 ++sym)
7321 if (sym->st_shndx != SHN_UNDEF
7322 && (sym->st_shndx < SHN_LORESERVE
7323 || sym->st_shndx > SHN_HIRESERVE)
7324 && sym->st_value != 0
7325 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7326 {
7327 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7328 sym->st_value -= skip[sym->st_value >> 3];
7329 else
7330 {
7331 (*_bfd_error_handler)
7332 (_("%s defined in removed toc entry"),
7333 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7334 NULL));
7335 sym->st_value = 0;
7336 sym->st_shndx = SHN_ABS;
7337 }
7338 symtab_hdr->contents = (unsigned char *) local_syms;
7339 }
7340 }
7341
7342 /* Finally, adjust any global syms defined in the toc. */
7343 if (toc_inf.global_toc_syms)
7344 {
7345 toc_inf.toc = toc;
7346 toc_inf.skip = skip;
7347 toc_inf.global_toc_syms = FALSE;
7348 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7349 &toc_inf);
7350 }
7351 }
7352
7353 if (local_syms != NULL
7354 && symtab_hdr->contents != (unsigned char *) local_syms)
7355 {
7356 if (!info->keep_memory)
7357 free (local_syms);
7358 else
7359 symtab_hdr->contents = (unsigned char *) local_syms;
7360 }
7361 free (skip);
7362 }
7363
7364 return TRUE;
7365 }
7366
7367 /* Allocate space in .plt, .got and associated reloc sections for
7368 dynamic relocs. */
7369
7370 static bfd_boolean
7371 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7372 {
7373 struct bfd_link_info *info;
7374 struct ppc_link_hash_table *htab;
7375 asection *s;
7376 struct ppc_link_hash_entry *eh;
7377 struct ppc_dyn_relocs *p;
7378 struct got_entry *gent;
7379
7380 if (h->root.type == bfd_link_hash_indirect)
7381 return TRUE;
7382
7383 if (h->root.type == bfd_link_hash_warning)
7384 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7385
7386 info = (struct bfd_link_info *) inf;
7387 htab = ppc_hash_table (info);
7388
7389 if (htab->elf.dynamic_sections_created
7390 && h->dynindx != -1
7391 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7392 {
7393 struct plt_entry *pent;
7394 bfd_boolean doneone = FALSE;
7395 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7396 if (pent->plt.refcount > 0)
7397 {
7398 /* If this is the first .plt entry, make room for the special
7399 first entry. */
7400 s = htab->plt;
7401 if (s->size == 0)
7402 s->size += PLT_INITIAL_ENTRY_SIZE;
7403
7404 pent->plt.offset = s->size;
7405
7406 /* Make room for this entry. */
7407 s->size += PLT_ENTRY_SIZE;
7408
7409 /* Make room for the .glink code. */
7410 s = htab->glink;
7411 if (s->size == 0)
7412 s->size += GLINK_CALL_STUB_SIZE;
7413 /* We need bigger stubs past index 32767. */
7414 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7415 s->size += 4;
7416 s->size += 2*4;
7417
7418 /* We also need to make an entry in the .rela.plt section. */
7419 s = htab->relplt;
7420 s->size += sizeof (Elf64_External_Rela);
7421 doneone = TRUE;
7422 }
7423 else
7424 pent->plt.offset = (bfd_vma) -1;
7425 if (!doneone)
7426 {
7427 h->plt.plist = NULL;
7428 h->needs_plt = 0;
7429 }
7430 }
7431 else
7432 {
7433 h->plt.plist = NULL;
7434 h->needs_plt = 0;
7435 }
7436
7437 eh = (struct ppc_link_hash_entry *) h;
7438 /* Run through the TLS GD got entries first if we're changing them
7439 to TPREL. */
7440 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7441 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7442 if (gent->got.refcount > 0
7443 && (gent->tls_type & TLS_GD) != 0)
7444 {
7445 /* This was a GD entry that has been converted to TPREL. If
7446 there happens to be a TPREL entry we can use that one. */
7447 struct got_entry *ent;
7448 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7449 if (ent->got.refcount > 0
7450 && (ent->tls_type & TLS_TPREL) != 0
7451 && ent->addend == gent->addend
7452 && ent->owner == gent->owner)
7453 {
7454 gent->got.refcount = 0;
7455 break;
7456 }
7457
7458 /* If not, then we'll be using our own TPREL entry. */
7459 if (gent->got.refcount != 0)
7460 gent->tls_type = TLS_TLS | TLS_TPREL;
7461 }
7462
7463 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7464 if (gent->got.refcount > 0)
7465 {
7466 bfd_boolean dyn;
7467
7468 /* Make sure this symbol is output as a dynamic symbol.
7469 Undefined weak syms won't yet be marked as dynamic,
7470 nor will all TLS symbols. */
7471 if (h->dynindx == -1
7472 && !h->forced_local)
7473 {
7474 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7475 return FALSE;
7476 }
7477
7478 if ((gent->tls_type & TLS_LD) != 0
7479 && !h->def_dynamic)
7480 {
7481 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7482 continue;
7483 }
7484
7485 s = ppc64_elf_tdata (gent->owner)->got;
7486 gent->got.offset = s->size;
7487 s->size
7488 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7489 dyn = htab->elf.dynamic_sections_created;
7490 if ((info->shared
7491 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7492 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7493 || h->root.type != bfd_link_hash_undefweak))
7494 ppc64_elf_tdata (gent->owner)->relgot->size
7495 += (gent->tls_type & eh->tls_mask & TLS_GD
7496 ? 2 * sizeof (Elf64_External_Rela)
7497 : sizeof (Elf64_External_Rela));
7498 }
7499 else
7500 gent->got.offset = (bfd_vma) -1;
7501
7502 if (eh->dyn_relocs == NULL)
7503 return TRUE;
7504
7505 /* In the shared -Bsymbolic case, discard space allocated for
7506 dynamic pc-relative relocs against symbols which turn out to be
7507 defined in regular objects. For the normal shared case, discard
7508 space for relocs that have become local due to symbol visibility
7509 changes. */
7510
7511 if (info->shared)
7512 {
7513 /* Relocs that use pc_count are those that appear on a call insn,
7514 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7515 generated via assembly. We want calls to protected symbols to
7516 resolve directly to the function rather than going via the plt.
7517 If people want function pointer comparisons to work as expected
7518 then they should avoid writing weird assembly. */
7519 if (SYMBOL_CALLS_LOCAL (info, h))
7520 {
7521 struct ppc_dyn_relocs **pp;
7522
7523 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7524 {
7525 p->count -= p->pc_count;
7526 p->pc_count = 0;
7527 if (p->count == 0)
7528 *pp = p->next;
7529 else
7530 pp = &p->next;
7531 }
7532 }
7533
7534 /* Also discard relocs on undefined weak syms with non-default
7535 visibility. */
7536 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7537 && h->root.type == bfd_link_hash_undefweak)
7538 eh->dyn_relocs = NULL;
7539 }
7540 else if (ELIMINATE_COPY_RELOCS)
7541 {
7542 /* For the non-shared case, discard space for relocs against
7543 symbols which turn out to need copy relocs or are not
7544 dynamic. */
7545
7546 if (!h->non_got_ref
7547 && h->def_dynamic
7548 && !h->def_regular)
7549 {
7550 /* Make sure this symbol is output as a dynamic symbol.
7551 Undefined weak syms won't yet be marked as dynamic. */
7552 if (h->dynindx == -1
7553 && !h->forced_local)
7554 {
7555 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7556 return FALSE;
7557 }
7558
7559 /* If that succeeded, we know we'll be keeping all the
7560 relocs. */
7561 if (h->dynindx != -1)
7562 goto keep;
7563 }
7564
7565 eh->dyn_relocs = NULL;
7566
7567 keep: ;
7568 }
7569
7570 /* Finally, allocate space. */
7571 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7572 {
7573 asection *sreloc = elf_section_data (p->sec)->sreloc;
7574 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7575 }
7576
7577 return TRUE;
7578 }
7579
7580 /* Find any dynamic relocs that apply to read-only sections. */
7581
7582 static bfd_boolean
7583 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7584 {
7585 struct ppc_link_hash_entry *eh;
7586 struct ppc_dyn_relocs *p;
7587
7588 if (h->root.type == bfd_link_hash_warning)
7589 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7590
7591 eh = (struct ppc_link_hash_entry *) h;
7592 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7593 {
7594 asection *s = p->sec->output_section;
7595
7596 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7597 {
7598 struct bfd_link_info *info = inf;
7599
7600 info->flags |= DF_TEXTREL;
7601
7602 /* Not an error, just cut short the traversal. */
7603 return FALSE;
7604 }
7605 }
7606 return TRUE;
7607 }
7608
7609 /* Set the sizes of the dynamic sections. */
7610
7611 static bfd_boolean
7612 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7613 struct bfd_link_info *info)
7614 {
7615 struct ppc_link_hash_table *htab;
7616 bfd *dynobj;
7617 asection *s;
7618 bfd_boolean relocs;
7619 bfd *ibfd;
7620
7621 htab = ppc_hash_table (info);
7622 dynobj = htab->elf.dynobj;
7623 if (dynobj == NULL)
7624 abort ();
7625
7626 if (htab->elf.dynamic_sections_created)
7627 {
7628 /* Set the contents of the .interp section to the interpreter. */
7629 if (info->executable)
7630 {
7631 s = bfd_get_section_by_name (dynobj, ".interp");
7632 if (s == NULL)
7633 abort ();
7634 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7635 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7636 }
7637 }
7638
7639 /* Set up .got offsets for local syms, and space for local dynamic
7640 relocs. */
7641 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7642 {
7643 struct got_entry **lgot_ents;
7644 struct got_entry **end_lgot_ents;
7645 char *lgot_masks;
7646 bfd_size_type locsymcount;
7647 Elf_Internal_Shdr *symtab_hdr;
7648 asection *srel;
7649
7650 if (!is_ppc64_elf_target (ibfd->xvec))
7651 continue;
7652
7653 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7654 {
7655 s = ppc64_elf_tdata (ibfd)->got;
7656 ppc64_tlsld_got (ibfd)->offset = s->size;
7657 s->size += 16;
7658 if (info->shared)
7659 {
7660 srel = ppc64_elf_tdata (ibfd)->relgot;
7661 srel->size += sizeof (Elf64_External_Rela);
7662 }
7663 }
7664 else
7665 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7666
7667 for (s = ibfd->sections; s != NULL; s = s->next)
7668 {
7669 struct ppc_dyn_relocs *p;
7670
7671 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7672 {
7673 if (!bfd_is_abs_section (p->sec)
7674 && bfd_is_abs_section (p->sec->output_section))
7675 {
7676 /* Input section has been discarded, either because
7677 it is a copy of a linkonce section or due to
7678 linker script /DISCARD/, so we'll be discarding
7679 the relocs too. */
7680 }
7681 else if (p->count != 0)
7682 {
7683 srel = elf_section_data (p->sec)->sreloc;
7684 srel->size += p->count * sizeof (Elf64_External_Rela);
7685 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7686 info->flags |= DF_TEXTREL;
7687 }
7688 }
7689 }
7690
7691 lgot_ents = elf_local_got_ents (ibfd);
7692 if (!lgot_ents)
7693 continue;
7694
7695 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7696 locsymcount = symtab_hdr->sh_info;
7697 end_lgot_ents = lgot_ents + locsymcount;
7698 lgot_masks = (char *) end_lgot_ents;
7699 s = ppc64_elf_tdata (ibfd)->got;
7700 srel = ppc64_elf_tdata (ibfd)->relgot;
7701 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7702 {
7703 struct got_entry *ent;
7704
7705 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7706 if (ent->got.refcount > 0)
7707 {
7708 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7709 {
7710 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7711 {
7712 ppc64_tlsld_got (ibfd)->offset = s->size;
7713 s->size += 16;
7714 if (info->shared)
7715 srel->size += sizeof (Elf64_External_Rela);
7716 }
7717 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7718 }
7719 else
7720 {
7721 ent->got.offset = s->size;
7722 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7723 {
7724 s->size += 16;
7725 if (info->shared)
7726 srel->size += 2 * sizeof (Elf64_External_Rela);
7727 }
7728 else
7729 {
7730 s->size += 8;
7731 if (info->shared)
7732 srel->size += sizeof (Elf64_External_Rela);
7733 }
7734 }
7735 }
7736 else
7737 ent->got.offset = (bfd_vma) -1;
7738 }
7739 }
7740
7741 /* Allocate global sym .plt and .got entries, and space for global
7742 sym dynamic relocs. */
7743 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7744
7745 /* We now have determined the sizes of the various dynamic sections.
7746 Allocate memory for them. */
7747 relocs = FALSE;
7748 for (s = dynobj->sections; s != NULL; s = s->next)
7749 {
7750 if ((s->flags & SEC_LINKER_CREATED) == 0)
7751 continue;
7752
7753 if (s == htab->brlt || s == htab->relbrlt)
7754 /* These haven't been allocated yet; don't strip. */
7755 continue;
7756 else if (s == htab->got
7757 || s == htab->plt
7758 || s == htab->glink
7759 || s == htab->dynbss)
7760 {
7761 /* Strip this section if we don't need it; see the
7762 comment below. */
7763 }
7764 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7765 {
7766 if (s->size != 0)
7767 {
7768 if (s != htab->relplt)
7769 relocs = TRUE;
7770
7771 /* We use the reloc_count field as a counter if we need
7772 to copy relocs into the output file. */
7773 s->reloc_count = 0;
7774 }
7775 }
7776 else
7777 {
7778 /* It's not one of our sections, so don't allocate space. */
7779 continue;
7780 }
7781
7782 if (s->size == 0)
7783 {
7784 /* If we don't need this section, strip it from the
7785 output file. This is mostly to handle .rela.bss and
7786 .rela.plt. We must create both sections in
7787 create_dynamic_sections, because they must be created
7788 before the linker maps input sections to output
7789 sections. The linker does that before
7790 adjust_dynamic_symbol is called, and it is that
7791 function which decides whether anything needs to go
7792 into these sections. */
7793 s->flags |= SEC_EXCLUDE;
7794 continue;
7795 }
7796
7797 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7798 continue;
7799
7800 /* Allocate memory for the section contents. We use bfd_zalloc
7801 here in case unused entries are not reclaimed before the
7802 section's contents are written out. This should not happen,
7803 but this way if it does we get a R_PPC64_NONE reloc in .rela
7804 sections instead of garbage.
7805 We also rely on the section contents being zero when writing
7806 the GOT. */
7807 s->contents = bfd_zalloc (dynobj, s->size);
7808 if (s->contents == NULL)
7809 return FALSE;
7810 }
7811
7812 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7813 {
7814 if (!is_ppc64_elf_target (ibfd->xvec))
7815 continue;
7816
7817 s = ppc64_elf_tdata (ibfd)->got;
7818 if (s != NULL && s != htab->got)
7819 {
7820 if (s->size == 0)
7821 s->flags |= SEC_EXCLUDE;
7822 else
7823 {
7824 s->contents = bfd_zalloc (ibfd, s->size);
7825 if (s->contents == NULL)
7826 return FALSE;
7827 }
7828 }
7829 s = ppc64_elf_tdata (ibfd)->relgot;
7830 if (s != NULL)
7831 {
7832 if (s->size == 0)
7833 s->flags |= SEC_EXCLUDE;
7834 else
7835 {
7836 s->contents = bfd_zalloc (ibfd, s->size);
7837 if (s->contents == NULL)
7838 return FALSE;
7839 relocs = TRUE;
7840 s->reloc_count = 0;
7841 }
7842 }
7843 }
7844
7845 if (htab->elf.dynamic_sections_created)
7846 {
7847 /* Add some entries to the .dynamic section. We fill in the
7848 values later, in ppc64_elf_finish_dynamic_sections, but we
7849 must add the entries now so that we get the correct size for
7850 the .dynamic section. The DT_DEBUG entry is filled in by the
7851 dynamic linker and used by the debugger. */
7852 #define add_dynamic_entry(TAG, VAL) \
7853 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7854
7855 if (info->executable)
7856 {
7857 if (!add_dynamic_entry (DT_DEBUG, 0))
7858 return FALSE;
7859 }
7860
7861 if (htab->plt != NULL && htab->plt->size != 0)
7862 {
7863 if (!add_dynamic_entry (DT_PLTGOT, 0)
7864 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7865 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7866 || !add_dynamic_entry (DT_JMPREL, 0)
7867 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7868 return FALSE;
7869 }
7870
7871 if (NO_OPD_RELOCS)
7872 {
7873 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7874 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7875 return FALSE;
7876 }
7877
7878 if (relocs)
7879 {
7880 if (!add_dynamic_entry (DT_RELA, 0)
7881 || !add_dynamic_entry (DT_RELASZ, 0)
7882 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7883 return FALSE;
7884
7885 /* If any dynamic relocs apply to a read-only section,
7886 then we need a DT_TEXTREL entry. */
7887 if ((info->flags & DF_TEXTREL) == 0)
7888 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7889
7890 if ((info->flags & DF_TEXTREL) != 0)
7891 {
7892 if (!add_dynamic_entry (DT_TEXTREL, 0))
7893 return FALSE;
7894 }
7895 }
7896 }
7897 #undef add_dynamic_entry
7898
7899 return TRUE;
7900 }
7901
7902 /* Determine the type of stub needed, if any, for a call. */
7903
7904 static inline enum ppc_stub_type
7905 ppc_type_of_stub (asection *input_sec,
7906 const Elf_Internal_Rela *rel,
7907 struct ppc_link_hash_entry **hash,
7908 bfd_vma destination)
7909 {
7910 struct ppc_link_hash_entry *h = *hash;
7911 bfd_vma location;
7912 bfd_vma branch_offset;
7913 bfd_vma max_branch_offset;
7914 enum elf_ppc64_reloc_type r_type;
7915
7916 if (h != NULL)
7917 {
7918 struct ppc_link_hash_entry *fdh = h;
7919 if (fdh->oh != NULL
7920 && fdh->oh->is_func_descriptor)
7921 fdh = fdh->oh;
7922
7923 if (fdh->elf.dynindx != -1)
7924 {
7925 struct plt_entry *ent;
7926
7927 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
7928 if (ent->addend == rel->r_addend
7929 && ent->plt.offset != (bfd_vma) -1)
7930 {
7931 *hash = fdh;
7932 return ppc_stub_plt_call;
7933 }
7934 }
7935
7936 /* Here, we know we don't have a plt entry. If we don't have a
7937 either a defined function descriptor or a defined entry symbol
7938 in a regular object file, then it is pointless trying to make
7939 any other type of stub. */
7940 if (!((fdh->elf.root.type == bfd_link_hash_defined
7941 || fdh->elf.root.type == bfd_link_hash_defweak)
7942 && fdh->elf.root.u.def.section->output_section != NULL)
7943 && !((h->elf.root.type == bfd_link_hash_defined
7944 || h->elf.root.type == bfd_link_hash_defweak)
7945 && h->elf.root.u.def.section->output_section != NULL))
7946 return ppc_stub_none;
7947 }
7948
7949 /* Determine where the call point is. */
7950 location = (input_sec->output_offset
7951 + input_sec->output_section->vma
7952 + rel->r_offset);
7953
7954 branch_offset = destination - location;
7955 r_type = ELF64_R_TYPE (rel->r_info);
7956
7957 /* Determine if a long branch stub is needed. */
7958 max_branch_offset = 1 << 25;
7959 if (r_type != R_PPC64_REL24)
7960 max_branch_offset = 1 << 15;
7961
7962 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7963 /* We need a stub. Figure out whether a long_branch or plt_branch
7964 is needed later. */
7965 return ppc_stub_long_branch;
7966
7967 return ppc_stub_none;
7968 }
7969
7970 /* Build a .plt call stub. */
7971
7972 static inline bfd_byte *
7973 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7974 {
7975 #define PPC_LO(v) ((v) & 0xffff)
7976 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7977 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7978
7979 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7980 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7981 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7982 if (PPC_HA (offset + 8) != PPC_HA (offset))
7983 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7984 offset += 8;
7985 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7986 if (PPC_HA (offset + 8) != PPC_HA (offset))
7987 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7988 offset += 8;
7989 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7990 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7991 bfd_put_32 (obfd, BCTR, p), p += 4;
7992 return p;
7993 }
7994
7995 static bfd_boolean
7996 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7997 {
7998 struct ppc_stub_hash_entry *stub_entry;
7999 struct ppc_branch_hash_entry *br_entry;
8000 struct bfd_link_info *info;
8001 struct ppc_link_hash_table *htab;
8002 bfd_byte *loc;
8003 bfd_byte *p;
8004 unsigned int indx;
8005 struct plt_entry *ent;
8006 bfd_vma dest, off;
8007 int size;
8008
8009 /* Massage our args to the form they really have. */
8010 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8011 info = in_arg;
8012
8013 htab = ppc_hash_table (info);
8014
8015 /* Make a note of the offset within the stubs for this entry. */
8016 stub_entry->stub_offset = stub_entry->stub_sec->size;
8017 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8018
8019 htab->stub_count[stub_entry->stub_type - 1] += 1;
8020 switch (stub_entry->stub_type)
8021 {
8022 case ppc_stub_long_branch:
8023 case ppc_stub_long_branch_r2off:
8024 /* Branches are relative. This is where we are going to. */
8025 off = dest = (stub_entry->target_value
8026 + stub_entry->target_section->output_offset
8027 + stub_entry->target_section->output_section->vma);
8028
8029 /* And this is where we are coming from. */
8030 off -= (stub_entry->stub_offset
8031 + stub_entry->stub_sec->output_offset
8032 + stub_entry->stub_sec->output_section->vma);
8033
8034 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8035 size = 4;
8036 else
8037 {
8038 bfd_vma r2off;
8039
8040 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8041 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8042 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8043 loc += 4;
8044 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8045 loc += 4;
8046 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8047 loc += 4;
8048 off -= 12;
8049 size = 16;
8050 }
8051 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8052
8053 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8054 {
8055 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8056 stub_entry->root.string);
8057 htab->stub_error = TRUE;
8058 return FALSE;
8059 }
8060
8061 if (info->emitrelocations)
8062 {
8063 Elf_Internal_Rela *relocs, *r;
8064 struct bfd_elf_section_data *elfsec_data;
8065
8066 elfsec_data = elf_section_data (stub_entry->stub_sec);
8067 relocs = elfsec_data->relocs;
8068 if (relocs == NULL)
8069 {
8070 bfd_size_type relsize;
8071 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8072 relocs = bfd_alloc (htab->stub_bfd, relsize);
8073 if (relocs == NULL)
8074 return FALSE;
8075 elfsec_data->relocs = relocs;
8076 elfsec_data->rel_hdr.sh_size = relsize;
8077 elfsec_data->rel_hdr.sh_entsize = 24;
8078 stub_entry->stub_sec->reloc_count = 0;
8079 }
8080 r = relocs + stub_entry->stub_sec->reloc_count;
8081 stub_entry->stub_sec->reloc_count += 1;
8082 r->r_offset = loc - stub_entry->stub_sec->contents;
8083 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8084 r->r_addend = dest;
8085 if (stub_entry->h != NULL)
8086 {
8087 struct elf_link_hash_entry **hashes;
8088 unsigned long symndx;
8089 struct ppc_link_hash_entry *h;
8090
8091 hashes = elf_sym_hashes (htab->stub_bfd);
8092 if (hashes == NULL)
8093 {
8094 bfd_size_type hsize;
8095
8096 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8097 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8098 if (hashes == NULL)
8099 return FALSE;
8100 elf_sym_hashes (htab->stub_bfd) = hashes;
8101 htab->stub_globals = 1;
8102 }
8103 symndx = htab->stub_globals++;
8104 h = stub_entry->h;
8105 hashes[symndx] = &h->elf;
8106 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8107 if (h->oh != NULL && h->oh->is_func)
8108 h = h->oh;
8109 if (h->elf.root.u.def.section != stub_entry->target_section)
8110 /* H is an opd symbol. The addend must be zero. */
8111 r->r_addend = 0;
8112 else
8113 {
8114 off = (h->elf.root.u.def.value
8115 + h->elf.root.u.def.section->output_offset
8116 + h->elf.root.u.def.section->output_section->vma);
8117 r->r_addend -= off;
8118 }
8119 }
8120 }
8121 break;
8122
8123 case ppc_stub_plt_branch:
8124 case ppc_stub_plt_branch_r2off:
8125 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8126 stub_entry->root.string + 9,
8127 FALSE, FALSE);
8128 if (br_entry == NULL)
8129 {
8130 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8131 stub_entry->root.string);
8132 htab->stub_error = TRUE;
8133 return FALSE;
8134 }
8135
8136 off = (stub_entry->target_value
8137 + stub_entry->target_section->output_offset
8138 + stub_entry->target_section->output_section->vma);
8139
8140 bfd_put_64 (htab->brlt->owner, off,
8141 htab->brlt->contents + br_entry->offset);
8142
8143 if (htab->relbrlt != NULL)
8144 {
8145 /* Create a reloc for the branch lookup table entry. */
8146 Elf_Internal_Rela rela;
8147 bfd_byte *rl;
8148
8149 rela.r_offset = (br_entry->offset
8150 + htab->brlt->output_offset
8151 + htab->brlt->output_section->vma);
8152 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8153 rela.r_addend = off;
8154
8155 rl = htab->relbrlt->contents;
8156 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8157 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8158 }
8159
8160 off = (br_entry->offset
8161 + htab->brlt->output_offset
8162 + htab->brlt->output_section->vma
8163 - elf_gp (htab->brlt->output_section->owner)
8164 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8165
8166 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8167 {
8168 (*_bfd_error_handler)
8169 (_("linkage table error against `%s'"),
8170 stub_entry->root.string);
8171 bfd_set_error (bfd_error_bad_value);
8172 htab->stub_error = TRUE;
8173 return FALSE;
8174 }
8175
8176 indx = off;
8177 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8178 {
8179 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8180 loc += 4;
8181 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8182 size = 16;
8183 }
8184 else
8185 {
8186 bfd_vma r2off;
8187
8188 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8189 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8190 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8191 loc += 4;
8192 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8193 loc += 4;
8194 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8195 loc += 4;
8196 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8197 loc += 4;
8198 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8199 size = 28;
8200 }
8201 loc += 4;
8202 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8203 loc += 4;
8204 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8205 break;
8206
8207 case ppc_stub_plt_call:
8208 /* Do the best we can for shared libraries built without
8209 exporting ".foo" for each "foo". This can happen when symbol
8210 versioning scripts strip all bar a subset of symbols. */
8211 if (stub_entry->h->oh != NULL
8212 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8213 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8214 {
8215 /* Point the symbol at the stub. There may be multiple stubs,
8216 we don't really care; The main thing is to make this sym
8217 defined somewhere. Maybe defining the symbol in the stub
8218 section is a silly idea. If we didn't do this, htab->top_id
8219 could disappear. */
8220 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8221 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8222 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8223 }
8224
8225 /* Now build the stub. */
8226 off = (bfd_vma) -1;
8227 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8228 if (ent->addend == stub_entry->addend)
8229 {
8230 off = ent->plt.offset;
8231 break;
8232 }
8233 if (off >= (bfd_vma) -2)
8234 abort ();
8235
8236 off &= ~ (bfd_vma) 1;
8237 off += (htab->plt->output_offset
8238 + htab->plt->output_section->vma
8239 - elf_gp (htab->plt->output_section->owner)
8240 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8241
8242 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8243 {
8244 (*_bfd_error_handler)
8245 (_("linkage table error against `%s'"),
8246 stub_entry->h->elf.root.root.string);
8247 bfd_set_error (bfd_error_bad_value);
8248 htab->stub_error = TRUE;
8249 return FALSE;
8250 }
8251
8252 p = build_plt_stub (htab->stub_bfd, loc, off);
8253 size = p - loc;
8254 break;
8255
8256 default:
8257 BFD_FAIL ();
8258 return FALSE;
8259 }
8260
8261 stub_entry->stub_sec->size += size;
8262
8263 if (htab->emit_stub_syms)
8264 {
8265 struct elf_link_hash_entry *h;
8266 size_t len1, len2;
8267 char *name;
8268 const char *const stub_str[] = { "long_branch",
8269 "long_branch_r2off",
8270 "plt_branch",
8271 "plt_branch_r2off",
8272 "plt_call" };
8273
8274 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8275 len2 = strlen (stub_entry->root.string);
8276 name = bfd_malloc (len1 + len2 + 2);
8277 if (name == NULL)
8278 return FALSE;
8279 memcpy (name, stub_entry->root.string, 9);
8280 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8281 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8282 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8283 if (h == NULL)
8284 return FALSE;
8285 if (h->root.type == bfd_link_hash_new)
8286 {
8287 h->root.type = bfd_link_hash_defined;
8288 h->root.u.def.section = stub_entry->stub_sec;
8289 h->root.u.def.value = stub_entry->stub_offset;
8290 h->ref_regular = 1;
8291 h->def_regular = 1;
8292 h->ref_regular_nonweak = 1;
8293 h->forced_local = 1;
8294 h->non_elf = 0;
8295 }
8296 }
8297
8298 return TRUE;
8299 }
8300
8301 /* As above, but don't actually build the stub. Just bump offset so
8302 we know stub section sizes, and select plt_branch stubs where
8303 long_branch stubs won't do. */
8304
8305 static bfd_boolean
8306 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8307 {
8308 struct ppc_stub_hash_entry *stub_entry;
8309 struct bfd_link_info *info;
8310 struct ppc_link_hash_table *htab;
8311 bfd_vma off;
8312 int size;
8313
8314 /* Massage our args to the form they really have. */
8315 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8316 info = in_arg;
8317
8318 htab = ppc_hash_table (info);
8319
8320 if (stub_entry->stub_type == ppc_stub_plt_call)
8321 {
8322 struct plt_entry *ent;
8323 off = (bfd_vma) -1;
8324 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8325 if (ent->addend == stub_entry->addend)
8326 {
8327 off = ent->plt.offset & ~(bfd_vma) 1;
8328 break;
8329 }
8330 if (off >= (bfd_vma) -2)
8331 abort ();
8332 off += (htab->plt->output_offset
8333 + htab->plt->output_section->vma
8334 - elf_gp (htab->plt->output_section->owner)
8335 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8336
8337 size = PLT_CALL_STUB_SIZE;
8338 if (PPC_HA (off + 16) != PPC_HA (off))
8339 size += 4;
8340 }
8341 else
8342 {
8343 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8344 variants. */
8345 off = (stub_entry->target_value
8346 + stub_entry->target_section->output_offset
8347 + stub_entry->target_section->output_section->vma);
8348 off -= (stub_entry->stub_sec->size
8349 + stub_entry->stub_sec->output_offset
8350 + stub_entry->stub_sec->output_section->vma);
8351
8352 /* Reset the stub type from the plt variant in case we now
8353 can reach with a shorter stub. */
8354 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8355 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8356
8357 size = 4;
8358 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8359 {
8360 off -= 12;
8361 size = 16;
8362 }
8363
8364 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8365 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8366 {
8367 struct ppc_branch_hash_entry *br_entry;
8368
8369 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8370 stub_entry->root.string + 9,
8371 TRUE, FALSE);
8372 if (br_entry == NULL)
8373 {
8374 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8375 stub_entry->root.string);
8376 htab->stub_error = TRUE;
8377 return FALSE;
8378 }
8379
8380 if (br_entry->iter != htab->stub_iteration)
8381 {
8382 br_entry->iter = htab->stub_iteration;
8383 br_entry->offset = htab->brlt->size;
8384 htab->brlt->size += 8;
8385
8386 if (htab->relbrlt != NULL)
8387 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8388 }
8389
8390 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8391 size = 16;
8392 if (stub_entry->stub_type != ppc_stub_plt_branch)
8393 size = 28;
8394 }
8395
8396 if (info->emitrelocations
8397 && (stub_entry->stub_type == ppc_stub_long_branch
8398 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8399 stub_entry->stub_sec->reloc_count += 1;
8400 }
8401
8402 stub_entry->stub_sec->size += size;
8403 return TRUE;
8404 }
8405
8406 /* Set up various things so that we can make a list of input sections
8407 for each output section included in the link. Returns -1 on error,
8408 0 when no stubs will be needed, and 1 on success. */
8409
8410 int
8411 ppc64_elf_setup_section_lists (bfd *output_bfd,
8412 struct bfd_link_info *info,
8413 int no_multi_toc)
8414 {
8415 bfd *input_bfd;
8416 int top_id, top_index, id;
8417 asection *section;
8418 asection **input_list;
8419 bfd_size_type amt;
8420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8421
8422 htab->no_multi_toc = no_multi_toc;
8423
8424 if (htab->brlt == NULL)
8425 return 0;
8426
8427 /* Find the top input section id. */
8428 for (input_bfd = info->input_bfds, top_id = 3;
8429 input_bfd != NULL;
8430 input_bfd = input_bfd->link_next)
8431 {
8432 for (section = input_bfd->sections;
8433 section != NULL;
8434 section = section->next)
8435 {
8436 if (top_id < section->id)
8437 top_id = section->id;
8438 }
8439 }
8440
8441 htab->top_id = top_id;
8442 amt = sizeof (struct map_stub) * (top_id + 1);
8443 htab->stub_group = bfd_zmalloc (amt);
8444 if (htab->stub_group == NULL)
8445 return -1;
8446
8447 /* Set toc_off for com, und, abs and ind sections. */
8448 for (id = 0; id < 3; id++)
8449 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8450
8451 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8452
8453 /* We can't use output_bfd->section_count here to find the top output
8454 section index as some sections may have been removed, and
8455 strip_excluded_output_sections doesn't renumber the indices. */
8456 for (section = output_bfd->sections, top_index = 0;
8457 section != NULL;
8458 section = section->next)
8459 {
8460 if (top_index < section->index)
8461 top_index = section->index;
8462 }
8463
8464 htab->top_index = top_index;
8465 amt = sizeof (asection *) * (top_index + 1);
8466 input_list = bfd_zmalloc (amt);
8467 htab->input_list = input_list;
8468 if (input_list == NULL)
8469 return -1;
8470
8471 return 1;
8472 }
8473
8474 /* The linker repeatedly calls this function for each TOC input section
8475 and linker generated GOT section. Group input bfds such that the toc
8476 within a group is less than 64k in size. Will break with cute linker
8477 scripts that play games with dot in the output toc section. */
8478
8479 void
8480 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8481 {
8482 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8483
8484 if (!htab->no_multi_toc)
8485 {
8486 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8487 bfd_vma off = addr - htab->toc_curr;
8488
8489 if (off + isec->size > 0x10000)
8490 htab->toc_curr = addr;
8491
8492 elf_gp (isec->owner) = (htab->toc_curr
8493 - elf_gp (isec->output_section->owner)
8494 + TOC_BASE_OFF);
8495 }
8496 }
8497
8498 /* Called after the last call to the above function. */
8499
8500 void
8501 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8502 {
8503 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8504
8505 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8506
8507 /* toc_curr tracks the TOC offset used for code sections below in
8508 ppc64_elf_next_input_section. Start off at 0x8000. */
8509 htab->toc_curr = TOC_BASE_OFF;
8510 }
8511
8512 /* No toc references were found in ISEC. If the code in ISEC makes no
8513 calls, then there's no need to use toc adjusting stubs when branching
8514 into ISEC. Actually, indirect calls from ISEC are OK as they will
8515 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8516 needed, and 2 if a cyclical call-graph was found but no other reason
8517 for a stub was detected. If called from the top level, a return of
8518 2 means the same as a return of 0. */
8519
8520 static int
8521 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8522 {
8523 Elf_Internal_Rela *relstart, *rel;
8524 Elf_Internal_Sym *local_syms;
8525 int ret;
8526 struct ppc_link_hash_table *htab;
8527
8528 /* We know none of our code bearing sections will need toc stubs. */
8529 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8530 return 0;
8531
8532 if (isec->size == 0)
8533 return 0;
8534
8535 if (isec->output_section == NULL)
8536 return 0;
8537
8538 /* Hack for linux kernel. .fixup contains branches, but only back to
8539 the function that hit an exception. */
8540 if (strcmp (isec->name, ".fixup") == 0)
8541 return 0;
8542
8543 if (isec->reloc_count == 0)
8544 return 0;
8545
8546 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8547 info->keep_memory);
8548 if (relstart == NULL)
8549 return -1;
8550
8551 /* Look for branches to outside of this section. */
8552 local_syms = NULL;
8553 ret = 0;
8554 htab = ppc_hash_table (info);
8555 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8556 {
8557 enum elf_ppc64_reloc_type r_type;
8558 unsigned long r_symndx;
8559 struct elf_link_hash_entry *h;
8560 Elf_Internal_Sym *sym;
8561 asection *sym_sec;
8562 long *opd_adjust;
8563 bfd_vma sym_value;
8564 bfd_vma dest;
8565
8566 r_type = ELF64_R_TYPE (rel->r_info);
8567 if (r_type != R_PPC64_REL24
8568 && r_type != R_PPC64_REL14
8569 && r_type != R_PPC64_REL14_BRTAKEN
8570 && r_type != R_PPC64_REL14_BRNTAKEN)
8571 continue;
8572
8573 r_symndx = ELF64_R_SYM (rel->r_info);
8574 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8575 isec->owner))
8576 {
8577 ret = -1;
8578 break;
8579 }
8580
8581 /* Calls to dynamic lib functions go through a plt call stub
8582 that uses r2. Branches to undefined symbols might be a call
8583 using old-style dot symbols that can be satisfied by a plt
8584 call into a new-style dynamic library. */
8585 if (sym_sec == NULL)
8586 {
8587 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8588 if (eh != NULL
8589 && eh->oh != NULL
8590 && eh->oh->elf.plt.plist != NULL)
8591 {
8592 ret = 1;
8593 break;
8594 }
8595
8596 /* Ignore other undefined symbols. */
8597 continue;
8598 }
8599
8600 /* Assume branches to other sections not included in the link need
8601 stubs too, to cover -R and absolute syms. */
8602 if (sym_sec->output_section == NULL)
8603 {
8604 ret = 1;
8605 break;
8606 }
8607
8608 if (h == NULL)
8609 sym_value = sym->st_value;
8610 else
8611 {
8612 if (h->root.type != bfd_link_hash_defined
8613 && h->root.type != bfd_link_hash_defweak)
8614 abort ();
8615 sym_value = h->root.u.def.value;
8616 }
8617 sym_value += rel->r_addend;
8618
8619 /* If this branch reloc uses an opd sym, find the code section. */
8620 opd_adjust = get_opd_info (sym_sec);
8621 if (opd_adjust != NULL)
8622 {
8623 if (h == NULL)
8624 {
8625 long adjust;
8626
8627 adjust = opd_adjust[sym->st_value / 8];
8628 if (adjust == -1)
8629 /* Assume deleted functions won't ever be called. */
8630 continue;
8631 sym_value += adjust;
8632 }
8633
8634 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8635 if (dest == (bfd_vma) -1)
8636 continue;
8637 }
8638 else
8639 dest = (sym_value
8640 + sym_sec->output_offset
8641 + sym_sec->output_section->vma);
8642
8643 /* Ignore branch to self. */
8644 if (sym_sec == isec)
8645 continue;
8646
8647 /* If the called function uses the toc, we need a stub. */
8648 if (sym_sec->has_toc_reloc
8649 || sym_sec->makes_toc_func_call)
8650 {
8651 ret = 1;
8652 break;
8653 }
8654
8655 /* Assume any branch that needs a long branch stub might in fact
8656 need a plt_branch stub. A plt_branch stub uses r2. */
8657 else if (dest - (isec->output_offset
8658 + isec->output_section->vma
8659 + rel->r_offset) + (1 << 25) >= (2 << 25))
8660 {
8661 ret = 1;
8662 break;
8663 }
8664
8665 /* If calling back to a section in the process of being tested, we
8666 can't say for sure that no toc adjusting stubs are needed, so
8667 don't return zero. */
8668 else if (sym_sec->call_check_in_progress)
8669 ret = 2;
8670
8671 /* Branches to another section that itself doesn't have any TOC
8672 references are OK. Recursively call ourselves to check. */
8673 else if (sym_sec->id <= htab->top_id
8674 && htab->stub_group[sym_sec->id].toc_off == 0)
8675 {
8676 int recur;
8677
8678 /* Mark current section as indeterminate, so that other
8679 sections that call back to current won't be marked as
8680 known. */
8681 isec->call_check_in_progress = 1;
8682 recur = toc_adjusting_stub_needed (info, sym_sec);
8683 isec->call_check_in_progress = 0;
8684
8685 if (recur < 0)
8686 {
8687 /* An error. Exit. */
8688 ret = -1;
8689 break;
8690 }
8691 else if (recur <= 1)
8692 {
8693 /* Known result. Mark as checked and set section flag. */
8694 htab->stub_group[sym_sec->id].toc_off = 1;
8695 if (recur != 0)
8696 {
8697 sym_sec->makes_toc_func_call = 1;
8698 ret = 1;
8699 break;
8700 }
8701 }
8702 else
8703 {
8704 /* Unknown result. Continue checking. */
8705 ret = 2;
8706 }
8707 }
8708 }
8709
8710 if (local_syms != NULL
8711 && (elf_tdata (isec->owner)->symtab_hdr.contents
8712 != (unsigned char *) local_syms))
8713 free (local_syms);
8714 if (elf_section_data (isec)->relocs != relstart)
8715 free (relstart);
8716
8717 return ret;
8718 }
8719
8720 /* The linker repeatedly calls this function for each input section,
8721 in the order that input sections are linked into output sections.
8722 Build lists of input sections to determine groupings between which
8723 we may insert linker stubs. */
8724
8725 bfd_boolean
8726 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8727 {
8728 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8729
8730 if ((isec->output_section->flags & SEC_CODE) != 0
8731 && isec->output_section->index <= htab->top_index)
8732 {
8733 asection **list = htab->input_list + isec->output_section->index;
8734 /* Steal the link_sec pointer for our list. */
8735 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8736 /* This happens to make the list in reverse order,
8737 which is what we want. */
8738 PREV_SEC (isec) = *list;
8739 *list = isec;
8740 }
8741
8742 if (htab->multi_toc_needed)
8743 {
8744 /* If a code section has a function that uses the TOC then we need
8745 to use the right TOC (obviously). Also, make sure that .opd gets
8746 the correct TOC value for R_PPC64_TOC relocs that don't have or
8747 can't find their function symbol (shouldn't ever happen now). */
8748 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8749 {
8750 if (elf_gp (isec->owner) != 0)
8751 htab->toc_curr = elf_gp (isec->owner);
8752 }
8753 else if (htab->stub_group[isec->id].toc_off == 0)
8754 {
8755 int ret = toc_adjusting_stub_needed (info, isec);
8756 if (ret < 0)
8757 return FALSE;
8758 else
8759 isec->makes_toc_func_call = ret & 1;
8760 }
8761 }
8762
8763 /* Functions that don't use the TOC can belong in any TOC group.
8764 Use the last TOC base. This happens to make _init and _fini
8765 pasting work. */
8766 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8767 return TRUE;
8768 }
8769
8770 /* See whether we can group stub sections together. Grouping stub
8771 sections may result in fewer stubs. More importantly, we need to
8772 put all .init* and .fini* stubs at the beginning of the .init or
8773 .fini output sections respectively, because glibc splits the
8774 _init and _fini functions into multiple parts. Putting a stub in
8775 the middle of a function is not a good idea. */
8776
8777 static void
8778 group_sections (struct ppc_link_hash_table *htab,
8779 bfd_size_type stub_group_size,
8780 bfd_boolean stubs_always_before_branch)
8781 {
8782 asection **list = htab->input_list + htab->top_index;
8783 do
8784 {
8785 asection *tail = *list;
8786 while (tail != NULL)
8787 {
8788 asection *curr;
8789 asection *prev;
8790 bfd_size_type total;
8791 bfd_boolean big_sec;
8792 bfd_vma curr_toc;
8793
8794 curr = tail;
8795 total = tail->size;
8796 big_sec = total > stub_group_size;
8797 if (big_sec)
8798 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8799 tail->owner, tail);
8800 curr_toc = htab->stub_group[tail->id].toc_off;
8801
8802 while ((prev = PREV_SEC (curr)) != NULL
8803 && ((total += curr->output_offset - prev->output_offset)
8804 < stub_group_size)
8805 && htab->stub_group[prev->id].toc_off == curr_toc)
8806 curr = prev;
8807
8808 /* OK, the size from the start of CURR to the end is less
8809 than stub_group_size and thus can be handled by one stub
8810 section. (or the tail section is itself larger than
8811 stub_group_size, in which case we may be toast.) We
8812 should really be keeping track of the total size of stubs
8813 added here, as stubs contribute to the final output
8814 section size. That's a little tricky, and this way will
8815 only break if stubs added make the total size more than
8816 2^25, ie. for the default stub_group_size, if stubs total
8817 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8818 do
8819 {
8820 prev = PREV_SEC (tail);
8821 /* Set up this stub group. */
8822 htab->stub_group[tail->id].link_sec = curr;
8823 }
8824 while (tail != curr && (tail = prev) != NULL);
8825
8826 /* But wait, there's more! Input sections up to stub_group_size
8827 bytes before the stub section can be handled by it too.
8828 Don't do this if we have a really large section after the
8829 stubs, as adding more stubs increases the chance that
8830 branches may not reach into the stub section. */
8831 if (!stubs_always_before_branch && !big_sec)
8832 {
8833 total = 0;
8834 while (prev != NULL
8835 && ((total += tail->output_offset - prev->output_offset)
8836 < stub_group_size)
8837 && htab->stub_group[prev->id].toc_off == curr_toc)
8838 {
8839 tail = prev;
8840 prev = PREV_SEC (tail);
8841 htab->stub_group[tail->id].link_sec = curr;
8842 }
8843 }
8844 tail = prev;
8845 }
8846 }
8847 while (list-- != htab->input_list);
8848 free (htab->input_list);
8849 #undef PREV_SEC
8850 }
8851
8852 /* Determine and set the size of the stub section for a final link.
8853
8854 The basic idea here is to examine all the relocations looking for
8855 PC-relative calls to a target that is unreachable with a "bl"
8856 instruction. */
8857
8858 bfd_boolean
8859 ppc64_elf_size_stubs (bfd *output_bfd,
8860 struct bfd_link_info *info,
8861 bfd_signed_vma group_size,
8862 asection *(*add_stub_section) (const char *, asection *),
8863 void (*layout_sections_again) (void))
8864 {
8865 bfd_size_type stub_group_size;
8866 bfd_boolean stubs_always_before_branch;
8867 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8868
8869 /* Stash our params away. */
8870 htab->add_stub_section = add_stub_section;
8871 htab->layout_sections_again = layout_sections_again;
8872 stubs_always_before_branch = group_size < 0;
8873 if (group_size < 0)
8874 stub_group_size = -group_size;
8875 else
8876 stub_group_size = group_size;
8877 if (stub_group_size == 1)
8878 {
8879 /* Default values. */
8880 if (stubs_always_before_branch)
8881 {
8882 stub_group_size = 0x1e00000;
8883 if (htab->has_14bit_branch)
8884 stub_group_size = 0x7800;
8885 }
8886 else
8887 {
8888 stub_group_size = 0x1c00000;
8889 if (htab->has_14bit_branch)
8890 stub_group_size = 0x7000;
8891 }
8892 }
8893
8894 group_sections (htab, stub_group_size, stubs_always_before_branch);
8895
8896 while (1)
8897 {
8898 bfd *input_bfd;
8899 unsigned int bfd_indx;
8900 asection *stub_sec;
8901
8902 htab->stub_iteration += 1;
8903
8904 for (input_bfd = info->input_bfds, bfd_indx = 0;
8905 input_bfd != NULL;
8906 input_bfd = input_bfd->link_next, bfd_indx++)
8907 {
8908 Elf_Internal_Shdr *symtab_hdr;
8909 asection *section;
8910 Elf_Internal_Sym *local_syms = NULL;
8911
8912 if (!is_ppc64_elf_target (input_bfd->xvec))
8913 continue;
8914
8915 /* We'll need the symbol table in a second. */
8916 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8917 if (symtab_hdr->sh_info == 0)
8918 continue;
8919
8920 /* Walk over each section attached to the input bfd. */
8921 for (section = input_bfd->sections;
8922 section != NULL;
8923 section = section->next)
8924 {
8925 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8926
8927 /* If there aren't any relocs, then there's nothing more
8928 to do. */
8929 if ((section->flags & SEC_RELOC) == 0
8930 || section->reloc_count == 0)
8931 continue;
8932
8933 /* If this section is a link-once section that will be
8934 discarded, then don't create any stubs. */
8935 if (section->output_section == NULL
8936 || section->output_section->owner != output_bfd)
8937 continue;
8938
8939 /* Get the relocs. */
8940 internal_relocs
8941 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8942 info->keep_memory);
8943 if (internal_relocs == NULL)
8944 goto error_ret_free_local;
8945
8946 /* Now examine each relocation. */
8947 irela = internal_relocs;
8948 irelaend = irela + section->reloc_count;
8949 for (; irela < irelaend; irela++)
8950 {
8951 enum elf_ppc64_reloc_type r_type;
8952 unsigned int r_indx;
8953 enum ppc_stub_type stub_type;
8954 struct ppc_stub_hash_entry *stub_entry;
8955 asection *sym_sec, *code_sec;
8956 bfd_vma sym_value;
8957 bfd_vma destination;
8958 bfd_boolean ok_dest;
8959 struct ppc_link_hash_entry *hash;
8960 struct ppc_link_hash_entry *fdh;
8961 struct elf_link_hash_entry *h;
8962 Elf_Internal_Sym *sym;
8963 char *stub_name;
8964 const asection *id_sec;
8965 long *opd_adjust;
8966
8967 r_type = ELF64_R_TYPE (irela->r_info);
8968 r_indx = ELF64_R_SYM (irela->r_info);
8969
8970 if (r_type >= R_PPC64_max)
8971 {
8972 bfd_set_error (bfd_error_bad_value);
8973 goto error_ret_free_internal;
8974 }
8975
8976 /* Only look for stubs on branch instructions. */
8977 if (r_type != R_PPC64_REL24
8978 && r_type != R_PPC64_REL14
8979 && r_type != R_PPC64_REL14_BRTAKEN
8980 && r_type != R_PPC64_REL14_BRNTAKEN)
8981 continue;
8982
8983 /* Now determine the call target, its name, value,
8984 section. */
8985 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8986 r_indx, input_bfd))
8987 goto error_ret_free_internal;
8988 hash = (struct ppc_link_hash_entry *) h;
8989
8990 ok_dest = FALSE;
8991 fdh = NULL;
8992 sym_value = 0;
8993 if (hash == NULL)
8994 {
8995 sym_value = sym->st_value;
8996 ok_dest = TRUE;
8997 }
8998 else if (hash->elf.root.type == bfd_link_hash_defined
8999 || hash->elf.root.type == bfd_link_hash_defweak)
9000 {
9001 sym_value = hash->elf.root.u.def.value;
9002 if (sym_sec->output_section != NULL)
9003 ok_dest = TRUE;
9004 }
9005 else if (hash->elf.root.type == bfd_link_hash_undefweak
9006 || hash->elf.root.type == bfd_link_hash_undefined)
9007 {
9008 /* Recognise an old ABI func code entry sym, and
9009 use the func descriptor sym instead if it is
9010 defined. */
9011 if (hash->elf.root.root.string[0] == '.'
9012 && (fdh = get_fdh (hash, htab)) != NULL)
9013 {
9014 if (fdh->elf.root.type == bfd_link_hash_defined
9015 || fdh->elf.root.type == bfd_link_hash_defweak)
9016 {
9017 sym_sec = fdh->elf.root.u.def.section;
9018 sym_value = fdh->elf.root.u.def.value;
9019 if (sym_sec->output_section != NULL)
9020 ok_dest = TRUE;
9021 }
9022 else
9023 fdh = NULL;
9024 }
9025 }
9026 else
9027 {
9028 bfd_set_error (bfd_error_bad_value);
9029 goto error_ret_free_internal;
9030 }
9031
9032 destination = 0;
9033 if (ok_dest)
9034 {
9035 sym_value += irela->r_addend;
9036 destination = (sym_value
9037 + sym_sec->output_offset
9038 + sym_sec->output_section->vma);
9039 }
9040
9041 code_sec = sym_sec;
9042 opd_adjust = get_opd_info (sym_sec);
9043 if (opd_adjust != NULL)
9044 {
9045 bfd_vma dest;
9046
9047 if (hash == NULL)
9048 {
9049 long adjust = opd_adjust[sym_value / 8];
9050 if (adjust == -1)
9051 continue;
9052 sym_value += adjust;
9053 }
9054 dest = opd_entry_value (sym_sec, sym_value,
9055 &code_sec, &sym_value);
9056 if (dest != (bfd_vma) -1)
9057 {
9058 destination = dest;
9059 if (fdh != NULL)
9060 {
9061 /* Fixup old ABI sym to point at code
9062 entry. */
9063 hash->elf.root.type = bfd_link_hash_defweak;
9064 hash->elf.root.u.def.section = code_sec;
9065 hash->elf.root.u.def.value = sym_value;
9066 }
9067 }
9068 }
9069
9070 /* Determine what (if any) linker stub is needed. */
9071 stub_type = ppc_type_of_stub (section, irela, &hash,
9072 destination);
9073
9074 if (stub_type != ppc_stub_plt_call)
9075 {
9076 /* Check whether we need a TOC adjusting stub.
9077 Since the linker pastes together pieces from
9078 different object files when creating the
9079 _init and _fini functions, it may be that a
9080 call to what looks like a local sym is in
9081 fact a call needing a TOC adjustment. */
9082 if (code_sec != NULL
9083 && code_sec->output_section != NULL
9084 && (htab->stub_group[code_sec->id].toc_off
9085 != htab->stub_group[section->id].toc_off)
9086 && (code_sec->has_toc_reloc
9087 || code_sec->makes_toc_func_call))
9088 stub_type = ppc_stub_long_branch_r2off;
9089 }
9090
9091 if (stub_type == ppc_stub_none)
9092 continue;
9093
9094 /* __tls_get_addr calls might be eliminated. */
9095 if (stub_type != ppc_stub_plt_call
9096 && hash != NULL
9097 && (hash == htab->tls_get_addr
9098 || hash == htab->tls_get_addr_fd)
9099 && section->has_tls_reloc
9100 && irela != internal_relocs)
9101 {
9102 /* Get tls info. */
9103 char *tls_mask;
9104
9105 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9106 irela - 1, input_bfd))
9107 goto error_ret_free_internal;
9108 if (*tls_mask != 0)
9109 continue;
9110 }
9111
9112 /* Support for grouping stub sections. */
9113 id_sec = htab->stub_group[section->id].link_sec;
9114
9115 /* Get the name of this stub. */
9116 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9117 if (!stub_name)
9118 goto error_ret_free_internal;
9119
9120 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9121 stub_name, FALSE, FALSE);
9122 if (stub_entry != NULL)
9123 {
9124 /* The proper stub has already been created. */
9125 free (stub_name);
9126 continue;
9127 }
9128
9129 stub_entry = ppc_add_stub (stub_name, section, htab);
9130 if (stub_entry == NULL)
9131 {
9132 free (stub_name);
9133 error_ret_free_internal:
9134 if (elf_section_data (section)->relocs == NULL)
9135 free (internal_relocs);
9136 error_ret_free_local:
9137 if (local_syms != NULL
9138 && (symtab_hdr->contents
9139 != (unsigned char *) local_syms))
9140 free (local_syms);
9141 return FALSE;
9142 }
9143
9144 stub_entry->stub_type = stub_type;
9145 stub_entry->target_value = sym_value;
9146 stub_entry->target_section = code_sec;
9147 stub_entry->h = hash;
9148 stub_entry->addend = irela->r_addend;
9149
9150 if (stub_entry->h != NULL)
9151 htab->stub_globals += 1;
9152 }
9153
9154 /* We're done with the internal relocs, free them. */
9155 if (elf_section_data (section)->relocs != internal_relocs)
9156 free (internal_relocs);
9157 }
9158
9159 if (local_syms != NULL
9160 && symtab_hdr->contents != (unsigned char *) local_syms)
9161 {
9162 if (!info->keep_memory)
9163 free (local_syms);
9164 else
9165 symtab_hdr->contents = (unsigned char *) local_syms;
9166 }
9167 }
9168
9169 /* We may have added some stubs. Find out the new size of the
9170 stub sections. */
9171 for (stub_sec = htab->stub_bfd->sections;
9172 stub_sec != NULL;
9173 stub_sec = stub_sec->next)
9174 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9175 {
9176 stub_sec->rawsize = stub_sec->size;
9177 stub_sec->size = 0;
9178 stub_sec->reloc_count = 0;
9179 }
9180
9181 htab->brlt->size = 0;
9182 if (htab->relbrlt != NULL)
9183 htab->relbrlt->size = 0;
9184
9185 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9186
9187 for (stub_sec = htab->stub_bfd->sections;
9188 stub_sec != NULL;
9189 stub_sec = stub_sec->next)
9190 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9191 && stub_sec->rawsize != stub_sec->size)
9192 break;
9193
9194 /* Exit from this loop when no stubs have been added, and no stubs
9195 have changed size. */
9196 if (stub_sec == NULL)
9197 break;
9198
9199 /* Ask the linker to do its stuff. */
9200 (*htab->layout_sections_again) ();
9201 }
9202
9203 /* It would be nice to strip htab->brlt from the output if the
9204 section is empty, but it's too late. If we strip sections here,
9205 the dynamic symbol table is corrupted since the section symbol
9206 for the stripped section isn't written. */
9207
9208 return TRUE;
9209 }
9210
9211 /* Called after we have determined section placement. If sections
9212 move, we'll be called again. Provide a value for TOCstart. */
9213
9214 bfd_vma
9215 ppc64_elf_toc (bfd *obfd)
9216 {
9217 asection *s;
9218 bfd_vma TOCstart;
9219
9220 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9221 order. The TOC starts where the first of these sections starts. */
9222 s = bfd_get_section_by_name (obfd, ".got");
9223 if (s == NULL)
9224 s = bfd_get_section_by_name (obfd, ".toc");
9225 if (s == NULL)
9226 s = bfd_get_section_by_name (obfd, ".tocbss");
9227 if (s == NULL)
9228 s = bfd_get_section_by_name (obfd, ".plt");
9229 if (s == NULL)
9230 {
9231 /* This may happen for
9232 o references to TOC base (SYM@toc / TOC[tc0]) without a
9233 .toc directive
9234 o bad linker script
9235 o --gc-sections and empty TOC sections
9236
9237 FIXME: Warn user? */
9238
9239 /* Look for a likely section. We probably won't even be
9240 using TOCstart. */
9241 for (s = obfd->sections; s != NULL; s = s->next)
9242 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9243 == (SEC_ALLOC | SEC_SMALL_DATA))
9244 break;
9245 if (s == NULL)
9246 for (s = obfd->sections; s != NULL; s = s->next)
9247 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9248 == (SEC_ALLOC | SEC_SMALL_DATA))
9249 break;
9250 if (s == NULL)
9251 for (s = obfd->sections; s != NULL; s = s->next)
9252 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9253 break;
9254 if (s == NULL)
9255 for (s = obfd->sections; s != NULL; s = s->next)
9256 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9257 break;
9258 }
9259
9260 TOCstart = 0;
9261 if (s != NULL)
9262 TOCstart = s->output_section->vma + s->output_offset;
9263
9264 return TOCstart;
9265 }
9266
9267 /* Build all the stubs associated with the current output file.
9268 The stubs are kept in a hash table attached to the main linker
9269 hash table. This function is called via gldelf64ppc_finish. */
9270
9271 bfd_boolean
9272 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9273 struct bfd_link_info *info,
9274 char **stats)
9275 {
9276 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9277 asection *stub_sec;
9278 bfd_byte *p;
9279 int stub_sec_count = 0;
9280
9281 htab->emit_stub_syms = emit_stub_syms;
9282
9283 /* Allocate memory to hold the linker stubs. */
9284 for (stub_sec = htab->stub_bfd->sections;
9285 stub_sec != NULL;
9286 stub_sec = stub_sec->next)
9287 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9288 && stub_sec->size != 0)
9289 {
9290 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9291 if (stub_sec->contents == NULL)
9292 return FALSE;
9293 /* We want to check that built size is the same as calculated
9294 size. rawsize is a convenient location to use. */
9295 stub_sec->rawsize = stub_sec->size;
9296 stub_sec->size = 0;
9297 }
9298
9299 if (htab->plt != NULL)
9300 {
9301 unsigned int indx;
9302 bfd_vma plt0;
9303
9304 /* Build the .glink plt call stub. */
9305 plt0 = (htab->plt->output_section->vma
9306 + htab->plt->output_offset
9307 - (htab->glink->output_section->vma
9308 + htab->glink->output_offset
9309 + GLINK_CALL_STUB_SIZE));
9310 if (plt0 + 0x80008000 > 0xffffffff)
9311 {
9312 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9313 bfd_set_error (bfd_error_bad_value);
9314 return FALSE;
9315 }
9316
9317 if (htab->emit_stub_syms)
9318 {
9319 struct elf_link_hash_entry *h;
9320 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9321 if (h == NULL)
9322 return FALSE;
9323 if (h->root.type == bfd_link_hash_new)
9324 {
9325 h->root.type = bfd_link_hash_defined;
9326 h->root.u.def.section = htab->glink;
9327 h->root.u.def.value = 0;
9328 h->ref_regular = 1;
9329 h->def_regular = 1;
9330 h->ref_regular_nonweak = 1;
9331 h->forced_local = 1;
9332 h->non_elf = 0;
9333 }
9334 }
9335 p = htab->glink->contents;
9336 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9337 p += 4;
9338 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9339 p += 4;
9340 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9341 p += 4;
9342 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9343 p += 4;
9344 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9345 p += 4;
9346 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9347 p += 4;
9348 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9349 p += 4;
9350 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9351 p += 4;
9352 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9353 p += 4;
9354 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9355 p += 4;
9356 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9357 p += 4;
9358 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9359 p += 4;
9360 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9361 p += 4;
9362 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9363 p += 4;
9364 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9365 p += 4;
9366 bfd_put_32 (htab->glink->owner, BCTR, p);
9367 p += 4;
9368
9369 /* Build the .glink lazy link call stubs. */
9370 indx = 0;
9371 while (p < htab->glink->contents + htab->glink->size)
9372 {
9373 if (indx < 0x8000)
9374 {
9375 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9376 p += 4;
9377 }
9378 else
9379 {
9380 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9381 p += 4;
9382 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9383 p += 4;
9384 }
9385 bfd_put_32 (htab->glink->owner,
9386 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9387 indx++;
9388 p += 4;
9389 }
9390 htab->glink->rawsize = p - htab->glink->contents;
9391 }
9392
9393 if (htab->brlt->size != 0)
9394 {
9395 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9396 htab->brlt->size);
9397 if (htab->brlt->contents == NULL)
9398 return FALSE;
9399 }
9400 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9401 {
9402 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9403 htab->relbrlt->size);
9404 if (htab->relbrlt->contents == NULL)
9405 return FALSE;
9406 }
9407
9408 /* Build the stubs as directed by the stub hash table. */
9409 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9410
9411 for (stub_sec = htab->stub_bfd->sections;
9412 stub_sec != NULL;
9413 stub_sec = stub_sec->next)
9414 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9415 {
9416 stub_sec_count += 1;
9417 if (stub_sec->rawsize != stub_sec->size)
9418 break;
9419 }
9420
9421 if (stub_sec != NULL
9422 || htab->glink->rawsize != htab->glink->size)
9423 {
9424 htab->stub_error = TRUE;
9425 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9426 }
9427
9428 if (htab->stub_error)
9429 return FALSE;
9430
9431 if (stats != NULL)
9432 {
9433 *stats = bfd_malloc (500);
9434 if (*stats == NULL)
9435 return FALSE;
9436
9437 sprintf (*stats, _("linker stubs in %u group%s\n"
9438 " branch %lu\n"
9439 " toc adjust %lu\n"
9440 " long branch %lu\n"
9441 " long toc adj %lu\n"
9442 " plt call %lu"),
9443 stub_sec_count,
9444 stub_sec_count == 1 ? "" : "s",
9445 htab->stub_count[ppc_stub_long_branch - 1],
9446 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9447 htab->stub_count[ppc_stub_plt_branch - 1],
9448 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9449 htab->stub_count[ppc_stub_plt_call - 1]);
9450 }
9451 return TRUE;
9452 }
9453
9454 /* This function undoes the changes made by add_symbol_adjust. */
9455
9456 static bfd_boolean
9457 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9458 {
9459 struct ppc_link_hash_entry *eh;
9460
9461 if (h->root.type == bfd_link_hash_indirect)
9462 return TRUE;
9463
9464 if (h->root.type == bfd_link_hash_warning)
9465 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9466
9467 eh = (struct ppc_link_hash_entry *) h;
9468 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9469 return TRUE;
9470
9471 eh->elf.root.type = bfd_link_hash_undefined;
9472 return TRUE;
9473 }
9474
9475 void
9476 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9477 {
9478 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9479 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9480 }
9481
9482 /* What to do when ld finds relocations against symbols defined in
9483 discarded sections. */
9484
9485 static unsigned int
9486 ppc64_elf_action_discarded (asection *sec)
9487 {
9488 if (strcmp (".opd", sec->name) == 0)
9489 return 0;
9490
9491 if (strcmp (".toc", sec->name) == 0)
9492 return 0;
9493
9494 if (strcmp (".toc1", sec->name) == 0)
9495 return 0;
9496
9497 return _bfd_elf_default_action_discarded (sec);
9498 }
9499
9500 /* The RELOCATE_SECTION function is called by the ELF backend linker
9501 to handle the relocations for a section.
9502
9503 The relocs are always passed as Rela structures; if the section
9504 actually uses Rel structures, the r_addend field will always be
9505 zero.
9506
9507 This function is responsible for adjust the section contents as
9508 necessary, and (if using Rela relocs and generating a
9509 relocatable output file) adjusting the reloc addend as
9510 necessary.
9511
9512 This function does not have to worry about setting the reloc
9513 address or the reloc symbol index.
9514
9515 LOCAL_SYMS is a pointer to the swapped in local symbols.
9516
9517 LOCAL_SECTIONS is an array giving the section in the input file
9518 corresponding to the st_shndx field of each local symbol.
9519
9520 The global hash table entry for the global symbols can be found
9521 via elf_sym_hashes (input_bfd).
9522
9523 When generating relocatable output, this function must handle
9524 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9525 going to be the section symbol corresponding to the output
9526 section, which means that the addend must be adjusted
9527 accordingly. */
9528
9529 static bfd_boolean
9530 ppc64_elf_relocate_section (bfd *output_bfd,
9531 struct bfd_link_info *info,
9532 bfd *input_bfd,
9533 asection *input_section,
9534 bfd_byte *contents,
9535 Elf_Internal_Rela *relocs,
9536 Elf_Internal_Sym *local_syms,
9537 asection **local_sections)
9538 {
9539 struct ppc_link_hash_table *htab;
9540 Elf_Internal_Shdr *symtab_hdr;
9541 struct elf_link_hash_entry **sym_hashes;
9542 Elf_Internal_Rela *rel;
9543 Elf_Internal_Rela *relend;
9544 Elf_Internal_Rela outrel;
9545 bfd_byte *loc;
9546 struct got_entry **local_got_ents;
9547 bfd_vma TOCstart;
9548 bfd_boolean ret = TRUE;
9549 bfd_boolean is_opd;
9550 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9551 bfd_boolean is_power4 = FALSE;
9552
9553 /* Initialize howto table if needed. */
9554 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9555 ppc_howto_init ();
9556
9557 htab = ppc_hash_table (info);
9558
9559 /* Don't relocate stub sections. */
9560 if (input_section->owner == htab->stub_bfd)
9561 return TRUE;
9562
9563 local_got_ents = elf_local_got_ents (input_bfd);
9564 TOCstart = elf_gp (output_bfd);
9565 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9566 sym_hashes = elf_sym_hashes (input_bfd);
9567 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9568
9569 rel = relocs;
9570 relend = relocs + input_section->reloc_count;
9571 for (; rel < relend; rel++)
9572 {
9573 enum elf_ppc64_reloc_type r_type;
9574 bfd_vma addend, orig_addend;
9575 bfd_reloc_status_type r;
9576 Elf_Internal_Sym *sym;
9577 asection *sec;
9578 struct elf_link_hash_entry *h_elf;
9579 struct ppc_link_hash_entry *h;
9580 struct ppc_link_hash_entry *fdh;
9581 const char *sym_name;
9582 unsigned long r_symndx, toc_symndx;
9583 char tls_mask, tls_gd, tls_type;
9584 char sym_type;
9585 bfd_vma relocation;
9586 bfd_boolean unresolved_reloc;
9587 bfd_boolean warned;
9588 unsigned long insn, mask;
9589 struct ppc_stub_hash_entry *stub_entry;
9590 bfd_vma max_br_offset;
9591 bfd_vma from;
9592
9593 r_type = ELF64_R_TYPE (rel->r_info);
9594 r_symndx = ELF64_R_SYM (rel->r_info);
9595
9596 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9597 symbol of the previous ADDR64 reloc. The symbol gives us the
9598 proper TOC base to use. */
9599 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9600 && rel != relocs
9601 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9602 && is_opd)
9603 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9604
9605 sym = NULL;
9606 sec = NULL;
9607 h_elf = NULL;
9608 sym_name = NULL;
9609 unresolved_reloc = FALSE;
9610 warned = FALSE;
9611 orig_addend = rel->r_addend;
9612
9613 if (r_symndx < symtab_hdr->sh_info)
9614 {
9615 /* It's a local symbol. */
9616 long *opd_adjust;
9617
9618 sym = local_syms + r_symndx;
9619 sec = local_sections[r_symndx];
9620 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9621 sym_type = ELF64_ST_TYPE (sym->st_info);
9622 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9623 opd_adjust = get_opd_info (sec);
9624 if (opd_adjust != NULL)
9625 {
9626 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9627 if (adjust == -1)
9628 relocation = 0;
9629 else
9630 {
9631 /* If this is a relocation against the opd section sym
9632 and we have edited .opd, adjust the reloc addend so
9633 that ld -r and ld --emit-relocs output is correct.
9634 If it is a reloc against some other .opd symbol,
9635 then the symbol value will be adjusted later. */
9636 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9637 rel->r_addend += adjust;
9638 else
9639 relocation += adjust;
9640 }
9641 }
9642 if (info->relocatable)
9643 continue;
9644 }
9645 else
9646 {
9647 if (info->relocatable)
9648 continue;
9649 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9650 r_symndx, symtab_hdr, sym_hashes,
9651 h_elf, sec, relocation,
9652 unresolved_reloc, warned);
9653 sym_name = h_elf->root.root.string;
9654 sym_type = h_elf->type;
9655 }
9656 h = (struct ppc_link_hash_entry *) h_elf;
9657
9658 /* TLS optimizations. Replace instruction sequences and relocs
9659 based on information we collected in tls_optimize. We edit
9660 RELOCS so that --emit-relocs will output something sensible
9661 for the final instruction stream. */
9662 tls_mask = 0;
9663 tls_gd = 0;
9664 toc_symndx = 0;
9665 if (IS_PPC64_TLS_RELOC (r_type))
9666 {
9667 if (h != NULL)
9668 tls_mask = h->tls_mask;
9669 else if (local_got_ents != NULL)
9670 {
9671 char *lgot_masks;
9672 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9673 tls_mask = lgot_masks[r_symndx];
9674 }
9675 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9676 {
9677 /* Check for toc tls entries. */
9678 char *toc_tls;
9679
9680 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9681 rel, input_bfd))
9682 return FALSE;
9683
9684 if (toc_tls)
9685 tls_mask = *toc_tls;
9686 }
9687 }
9688
9689 /* Check that tls relocs are used with tls syms, and non-tls
9690 relocs are used with non-tls syms. */
9691 if (r_symndx != 0
9692 && r_type != R_PPC64_NONE
9693 && (h == NULL
9694 || h->elf.root.type == bfd_link_hash_defined
9695 || h->elf.root.type == bfd_link_hash_defweak)
9696 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9697 {
9698 if (r_type == R_PPC64_TLS && tls_mask != 0)
9699 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9700 ;
9701 else
9702 (*_bfd_error_handler)
9703 (sym_type == STT_TLS
9704 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9705 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9706 input_bfd,
9707 input_section,
9708 (long) rel->r_offset,
9709 ppc64_elf_howto_table[r_type]->name,
9710 sym_name);
9711 }
9712
9713 /* Ensure reloc mapping code below stays sane. */
9714 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9715 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9716 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9717 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9718 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9719 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9720 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9721 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9722 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9723 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9724 abort ();
9725
9726 switch (r_type)
9727 {
9728 default:
9729 break;
9730
9731 case R_PPC64_TOC16:
9732 case R_PPC64_TOC16_LO:
9733 case R_PPC64_TOC16_DS:
9734 case R_PPC64_TOC16_LO_DS:
9735 {
9736 /* Check for toc tls entries. */
9737 char *toc_tls;
9738 int retval;
9739
9740 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9741 rel, input_bfd);
9742 if (retval == 0)
9743 return FALSE;
9744
9745 if (toc_tls)
9746 {
9747 tls_mask = *toc_tls;
9748 if (r_type == R_PPC64_TOC16_DS
9749 || r_type == R_PPC64_TOC16_LO_DS)
9750 {
9751 if (tls_mask != 0
9752 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9753 goto toctprel;
9754 }
9755 else
9756 {
9757 /* If we found a GD reloc pair, then we might be
9758 doing a GD->IE transition. */
9759 if (retval == 2)
9760 {
9761 tls_gd = TLS_TPRELGD;
9762 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9763 goto tls_get_addr_check;
9764 }
9765 else if (retval == 3)
9766 {
9767 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9768 goto tls_get_addr_check;
9769 }
9770 }
9771 }
9772 }
9773 break;
9774
9775 case R_PPC64_GOT_TPREL16_DS:
9776 case R_PPC64_GOT_TPREL16_LO_DS:
9777 if (tls_mask != 0
9778 && (tls_mask & TLS_TPREL) == 0)
9779 {
9780 toctprel:
9781 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9782 insn &= 31 << 21;
9783 insn |= 0x3c0d0000; /* addis 0,13,0 */
9784 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9785 r_type = R_PPC64_TPREL16_HA;
9786 if (toc_symndx != 0)
9787 {
9788 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9789 /* We changed the symbol. Start over in order to
9790 get h, sym, sec etc. right. */
9791 rel--;
9792 continue;
9793 }
9794 else
9795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9796 }
9797 break;
9798
9799 case R_PPC64_TLS:
9800 if (tls_mask != 0
9801 && (tls_mask & TLS_TPREL) == 0)
9802 {
9803 bfd_vma rtra;
9804 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9805 if ((insn & ((0x3f << 26) | (31 << 11)))
9806 == ((31 << 26) | (13 << 11)))
9807 rtra = insn & ((1 << 26) - (1 << 16));
9808 else if ((insn & ((0x3f << 26) | (31 << 16)))
9809 == ((31 << 26) | (13 << 16)))
9810 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9811 else
9812 abort ();
9813 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9814 /* add -> addi. */
9815 insn = 14 << 26;
9816 else if ((insn & (31 << 1)) == 23 << 1
9817 && ((insn & (31 << 6)) < 14 << 6
9818 || ((insn & (31 << 6)) >= 16 << 6
9819 && (insn & (31 << 6)) < 24 << 6)))
9820 /* load and store indexed -> dform. */
9821 insn = (32 | ((insn >> 6) & 31)) << 26;
9822 else if ((insn & (31 << 1)) == 21 << 1
9823 && (insn & (0x1a << 6)) == 0)
9824 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9825 insn = (((58 | ((insn >> 6) & 4)) << 26)
9826 | ((insn >> 6) & 1));
9827 else if ((insn & (31 << 1)) == 21 << 1
9828 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9829 /* lwax -> lwa. */
9830 insn = (58 << 26) | 2;
9831 else
9832 abort ();
9833 insn |= rtra;
9834 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9835 /* Was PPC64_TLS which sits on insn boundary, now
9836 PPC64_TPREL16_LO which is at insn+2. */
9837 rel->r_offset += 2;
9838 r_type = R_PPC64_TPREL16_LO;
9839 if (toc_symndx != 0)
9840 {
9841 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9842 /* We changed the symbol. Start over in order to
9843 get h, sym, sec etc. right. */
9844 rel--;
9845 continue;
9846 }
9847 else
9848 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9849 }
9850 break;
9851
9852 case R_PPC64_GOT_TLSGD16_HI:
9853 case R_PPC64_GOT_TLSGD16_HA:
9854 tls_gd = TLS_TPRELGD;
9855 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9856 goto tls_gdld_hi;
9857 break;
9858
9859 case R_PPC64_GOT_TLSLD16_HI:
9860 case R_PPC64_GOT_TLSLD16_HA:
9861 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9862 {
9863 tls_gdld_hi:
9864 if ((tls_mask & tls_gd) != 0)
9865 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9866 + R_PPC64_GOT_TPREL16_DS);
9867 else
9868 {
9869 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9870 rel->r_offset -= 2;
9871 r_type = R_PPC64_NONE;
9872 }
9873 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9874 }
9875 break;
9876
9877 case R_PPC64_GOT_TLSGD16:
9878 case R_PPC64_GOT_TLSGD16_LO:
9879 tls_gd = TLS_TPRELGD;
9880 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9881 goto tls_get_addr_check;
9882 break;
9883
9884 case R_PPC64_GOT_TLSLD16:
9885 case R_PPC64_GOT_TLSLD16_LO:
9886 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9887 {
9888 tls_get_addr_check:
9889 if (rel + 1 < relend)
9890 {
9891 enum elf_ppc64_reloc_type r_type2;
9892 unsigned long r_symndx2;
9893 struct elf_link_hash_entry *h2;
9894 bfd_vma insn1, insn2, insn3;
9895 bfd_vma offset;
9896
9897 /* The next instruction should be a call to
9898 __tls_get_addr. Peek at the reloc to be sure. */
9899 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9900 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9901 if (r_symndx2 < symtab_hdr->sh_info
9902 || (r_type2 != R_PPC64_REL14
9903 && r_type2 != R_PPC64_REL14_BRTAKEN
9904 && r_type2 != R_PPC64_REL14_BRNTAKEN
9905 && r_type2 != R_PPC64_REL24))
9906 break;
9907
9908 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9909 while (h2->root.type == bfd_link_hash_indirect
9910 || h2->root.type == bfd_link_hash_warning)
9911 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9912 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9913 && h2 != &htab->tls_get_addr_fd->elf))
9914 break;
9915
9916 /* OK, it checks out. Replace the call. */
9917 offset = rel[1].r_offset;
9918 insn1 = bfd_get_32 (output_bfd,
9919 contents + rel->r_offset - 2);
9920 insn3 = bfd_get_32 (output_bfd,
9921 contents + offset + 4);
9922 if ((tls_mask & tls_gd) != 0)
9923 {
9924 /* IE */
9925 insn1 &= (1 << 26) - (1 << 2);
9926 insn1 |= 58 << 26; /* ld */
9927 insn2 = 0x7c636a14; /* add 3,3,13 */
9928 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9929 if ((tls_mask & TLS_EXPLICIT) == 0)
9930 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9931 + R_PPC64_GOT_TPREL16_DS);
9932 else
9933 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9934 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9935 }
9936 else
9937 {
9938 /* LE */
9939 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9940 insn2 = 0x38630000; /* addi 3,3,0 */
9941 if (tls_gd == 0)
9942 {
9943 /* Was an LD reloc. */
9944 r_symndx = 0;
9945 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9946 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9947 }
9948 else if (toc_symndx != 0)
9949 r_symndx = toc_symndx;
9950 r_type = R_PPC64_TPREL16_HA;
9951 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9952 rel[1].r_info = ELF64_R_INFO (r_symndx,
9953 R_PPC64_TPREL16_LO);
9954 rel[1].r_offset += 2;
9955 }
9956 if (insn3 == NOP
9957 || insn3 == CROR_151515 || insn3 == CROR_313131)
9958 {
9959 insn3 = insn2;
9960 insn2 = NOP;
9961 rel[1].r_offset += 4;
9962 }
9963 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9964 bfd_put_32 (output_bfd, insn2, contents + offset);
9965 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9966 if (tls_gd == 0 || toc_symndx != 0)
9967 {
9968 /* We changed the symbol. Start over in order
9969 to get h, sym, sec etc. right. */
9970 rel--;
9971 continue;
9972 }
9973 }
9974 }
9975 break;
9976
9977 case R_PPC64_DTPMOD64:
9978 if (rel + 1 < relend
9979 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9980 && rel[1].r_offset == rel->r_offset + 8)
9981 {
9982 if ((tls_mask & TLS_GD) == 0)
9983 {
9984 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9985 if ((tls_mask & TLS_TPRELGD) != 0)
9986 r_type = R_PPC64_TPREL64;
9987 else
9988 {
9989 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9990 r_type = R_PPC64_NONE;
9991 }
9992 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9993 }
9994 }
9995 else
9996 {
9997 if ((tls_mask & TLS_LD) == 0)
9998 {
9999 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10000 r_type = R_PPC64_NONE;
10001 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10002 }
10003 }
10004 break;
10005
10006 case R_PPC64_TPREL64:
10007 if ((tls_mask & TLS_TPREL) == 0)
10008 {
10009 r_type = R_PPC64_NONE;
10010 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10011 }
10012 break;
10013 }
10014
10015 /* Handle other relocations that tweak non-addend part of insn. */
10016 insn = 0;
10017 max_br_offset = 1 << 25;
10018 addend = rel->r_addend;
10019 switch (r_type)
10020 {
10021 default:
10022 break;
10023
10024 /* Branch taken prediction relocations. */
10025 case R_PPC64_ADDR14_BRTAKEN:
10026 case R_PPC64_REL14_BRTAKEN:
10027 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10028 /* Fall thru. */
10029
10030 /* Branch not taken prediction relocations. */
10031 case R_PPC64_ADDR14_BRNTAKEN:
10032 case R_PPC64_REL14_BRNTAKEN:
10033 insn |= bfd_get_32 (output_bfd,
10034 contents + rel->r_offset) & ~(0x01 << 21);
10035 /* Fall thru. */
10036
10037 case R_PPC64_REL14:
10038 max_br_offset = 1 << 15;
10039 /* Fall thru. */
10040
10041 case R_PPC64_REL24:
10042 /* Calls to functions with a different TOC, such as calls to
10043 shared objects, need to alter the TOC pointer. This is
10044 done using a linkage stub. A REL24 branching to these
10045 linkage stubs needs to be followed by a nop, as the nop
10046 will be replaced with an instruction to restore the TOC
10047 base pointer. */
10048 stub_entry = NULL;
10049 fdh = h;
10050 if (((h != NULL
10051 && (((fdh = h->oh) != NULL
10052 && fdh->elf.plt.plist != NULL)
10053 || (fdh = h)->elf.plt.plist != NULL))
10054 || (sec != NULL
10055 && sec->output_section != NULL
10056 && sec->id <= htab->top_id
10057 && (htab->stub_group[sec->id].toc_off
10058 != htab->stub_group[input_section->id].toc_off)))
10059 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10060 rel, htab)) != NULL
10061 && (stub_entry->stub_type == ppc_stub_plt_call
10062 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10063 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10064 {
10065 bfd_boolean can_plt_call = FALSE;
10066
10067 if (rel->r_offset + 8 <= input_section->size)
10068 {
10069 unsigned long nop;
10070 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10071 if (nop == NOP
10072 || nop == CROR_151515 || nop == CROR_313131)
10073 {
10074 bfd_put_32 (input_bfd, LD_R2_40R1,
10075 contents + rel->r_offset + 4);
10076 can_plt_call = TRUE;
10077 }
10078 }
10079
10080 if (!can_plt_call)
10081 {
10082 if (stub_entry->stub_type == ppc_stub_plt_call)
10083 {
10084 /* If this is a plain branch rather than a branch
10085 and link, don't require a nop. However, don't
10086 allow tail calls in a shared library as they
10087 will result in r2 being corrupted. */
10088 unsigned long br;
10089 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10090 if (info->executable && (br & 1) == 0)
10091 can_plt_call = TRUE;
10092 else
10093 stub_entry = NULL;
10094 }
10095 else if (h != NULL
10096 && strcmp (h->elf.root.root.string,
10097 ".__libc_start_main") == 0)
10098 {
10099 /* Allow crt1 branch to go via a toc adjusting stub. */
10100 can_plt_call = TRUE;
10101 }
10102 else
10103 {
10104 if (strcmp (input_section->output_section->name,
10105 ".init") == 0
10106 || strcmp (input_section->output_section->name,
10107 ".fini") == 0)
10108 (*_bfd_error_handler)
10109 (_("%B(%A+0x%lx): automatic multiple TOCs "
10110 "not supported using your crt files; "
10111 "recompile with -mminimal-toc or upgrade gcc"),
10112 input_bfd,
10113 input_section,
10114 (long) rel->r_offset);
10115 else
10116 (*_bfd_error_handler)
10117 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10118 "does not allow automatic multiple TOCs; "
10119 "recompile with -mminimal-toc or "
10120 "-fno-optimize-sibling-calls, "
10121 "or make `%s' extern"),
10122 input_bfd,
10123 input_section,
10124 (long) rel->r_offset,
10125 sym_name,
10126 sym_name);
10127 bfd_set_error (bfd_error_bad_value);
10128 ret = FALSE;
10129 }
10130 }
10131
10132 if (can_plt_call
10133 && stub_entry->stub_type == ppc_stub_plt_call)
10134 unresolved_reloc = FALSE;
10135 }
10136
10137 if (stub_entry == NULL
10138 && get_opd_info (sec) != NULL)
10139 {
10140 /* The branch destination is the value of the opd entry. */
10141 bfd_vma off = (relocation + addend
10142 - sec->output_section->vma
10143 - sec->output_offset);
10144 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10145 if (dest != (bfd_vma) -1)
10146 {
10147 relocation = dest;
10148 addend = 0;
10149 }
10150 }
10151
10152 /* If the branch is out of reach we ought to have a long
10153 branch stub. */
10154 from = (rel->r_offset
10155 + input_section->output_offset
10156 + input_section->output_section->vma);
10157
10158 if (stub_entry == NULL
10159 && (relocation + addend - from + max_br_offset
10160 >= 2 * max_br_offset)
10161 && r_type != R_PPC64_ADDR14_BRTAKEN
10162 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10163 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10164 htab);
10165
10166 if (stub_entry != NULL)
10167 {
10168 /* Munge up the value and addend so that we call the stub
10169 rather than the procedure directly. */
10170 relocation = (stub_entry->stub_offset
10171 + stub_entry->stub_sec->output_offset
10172 + stub_entry->stub_sec->output_section->vma);
10173 addend = 0;
10174 }
10175
10176 if (insn != 0)
10177 {
10178 if (is_power4)
10179 {
10180 /* Set 'a' bit. This is 0b00010 in BO field for branch
10181 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10182 for branch on CTR insns (BO == 1a00t or 1a01t). */
10183 if ((insn & (0x14 << 21)) == (0x04 << 21))
10184 insn |= 0x02 << 21;
10185 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10186 insn |= 0x08 << 21;
10187 else
10188 break;
10189 }
10190 else
10191 {
10192 /* Invert 'y' bit if not the default. */
10193 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10194 insn ^= 0x01 << 21;
10195 }
10196
10197 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10198 }
10199
10200 /* NOP out calls to undefined weak functions.
10201 We can thus call a weak function without first
10202 checking whether the function is defined. */
10203 else if (h != NULL
10204 && h->elf.root.type == bfd_link_hash_undefweak
10205 && r_type == R_PPC64_REL24
10206 && relocation == 0
10207 && addend == 0)
10208 {
10209 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10210 continue;
10211 }
10212 break;
10213 }
10214
10215 /* Set `addend'. */
10216 tls_type = 0;
10217 switch (r_type)
10218 {
10219 default:
10220 (*_bfd_error_handler)
10221 (_("%B: unknown relocation type %d for symbol %s"),
10222 input_bfd, (int) r_type, sym_name);
10223
10224 bfd_set_error (bfd_error_bad_value);
10225 ret = FALSE;
10226 continue;
10227
10228 case R_PPC64_NONE:
10229 case R_PPC64_TLS:
10230 case R_PPC64_GNU_VTINHERIT:
10231 case R_PPC64_GNU_VTENTRY:
10232 continue;
10233
10234 /* GOT16 relocations. Like an ADDR16 using the symbol's
10235 address in the GOT as relocation value instead of the
10236 symbol's value itself. Also, create a GOT entry for the
10237 symbol and put the symbol value there. */
10238 case R_PPC64_GOT_TLSGD16:
10239 case R_PPC64_GOT_TLSGD16_LO:
10240 case R_PPC64_GOT_TLSGD16_HI:
10241 case R_PPC64_GOT_TLSGD16_HA:
10242 tls_type = TLS_TLS | TLS_GD;
10243 goto dogot;
10244
10245 case R_PPC64_GOT_TLSLD16:
10246 case R_PPC64_GOT_TLSLD16_LO:
10247 case R_PPC64_GOT_TLSLD16_HI:
10248 case R_PPC64_GOT_TLSLD16_HA:
10249 tls_type = TLS_TLS | TLS_LD;
10250 goto dogot;
10251
10252 case R_PPC64_GOT_TPREL16_DS:
10253 case R_PPC64_GOT_TPREL16_LO_DS:
10254 case R_PPC64_GOT_TPREL16_HI:
10255 case R_PPC64_GOT_TPREL16_HA:
10256 tls_type = TLS_TLS | TLS_TPREL;
10257 goto dogot;
10258
10259 case R_PPC64_GOT_DTPREL16_DS:
10260 case R_PPC64_GOT_DTPREL16_LO_DS:
10261 case R_PPC64_GOT_DTPREL16_HI:
10262 case R_PPC64_GOT_DTPREL16_HA:
10263 tls_type = TLS_TLS | TLS_DTPREL;
10264 goto dogot;
10265
10266 case R_PPC64_GOT16:
10267 case R_PPC64_GOT16_LO:
10268 case R_PPC64_GOT16_HI:
10269 case R_PPC64_GOT16_HA:
10270 case R_PPC64_GOT16_DS:
10271 case R_PPC64_GOT16_LO_DS:
10272 dogot:
10273 {
10274 /* Relocation is to the entry for this symbol in the global
10275 offset table. */
10276 asection *got;
10277 bfd_vma *offp;
10278 bfd_vma off;
10279 unsigned long indx = 0;
10280
10281 if (tls_type == (TLS_TLS | TLS_LD)
10282 && (h == NULL
10283 || !h->elf.def_dynamic))
10284 offp = &ppc64_tlsld_got (input_bfd)->offset;
10285 else
10286 {
10287 struct got_entry *ent;
10288
10289 if (h != NULL)
10290 {
10291 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10292 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10293 &h->elf)
10294 || (info->shared
10295 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10296 /* This is actually a static link, or it is a
10297 -Bsymbolic link and the symbol is defined
10298 locally, or the symbol was forced to be local
10299 because of a version file. */
10300 ;
10301 else
10302 {
10303 indx = h->elf.dynindx;
10304 unresolved_reloc = FALSE;
10305 }
10306 ent = h->elf.got.glist;
10307 }
10308 else
10309 {
10310 if (local_got_ents == NULL)
10311 abort ();
10312 ent = local_got_ents[r_symndx];
10313 }
10314
10315 for (; ent != NULL; ent = ent->next)
10316 if (ent->addend == orig_addend
10317 && ent->owner == input_bfd
10318 && ent->tls_type == tls_type)
10319 break;
10320 if (ent == NULL)
10321 abort ();
10322 offp = &ent->got.offset;
10323 }
10324
10325 got = ppc64_elf_tdata (input_bfd)->got;
10326 if (got == NULL)
10327 abort ();
10328
10329 /* The offset must always be a multiple of 8. We use the
10330 least significant bit to record whether we have already
10331 processed this entry. */
10332 off = *offp;
10333 if ((off & 1) != 0)
10334 off &= ~1;
10335 else
10336 {
10337 /* Generate relocs for the dynamic linker, except in
10338 the case of TLSLD where we'll use one entry per
10339 module. */
10340 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10341
10342 *offp = off | 1;
10343 if ((info->shared || indx != 0)
10344 && (h == NULL
10345 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10346 || h->elf.root.type != bfd_link_hash_undefweak))
10347 {
10348 outrel.r_offset = (got->output_section->vma
10349 + got->output_offset
10350 + off);
10351 outrel.r_addend = addend;
10352 if (tls_type & (TLS_LD | TLS_GD))
10353 {
10354 outrel.r_addend = 0;
10355 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10356 if (tls_type == (TLS_TLS | TLS_GD))
10357 {
10358 loc = relgot->contents;
10359 loc += (relgot->reloc_count++
10360 * sizeof (Elf64_External_Rela));
10361 bfd_elf64_swap_reloca_out (output_bfd,
10362 &outrel, loc);
10363 outrel.r_offset += 8;
10364 outrel.r_addend = addend;
10365 outrel.r_info
10366 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10367 }
10368 }
10369 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10370 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10371 else if (tls_type == (TLS_TLS | TLS_TPREL))
10372 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10373 else if (indx == 0)
10374 {
10375 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10376
10377 /* Write the .got section contents for the sake
10378 of prelink. */
10379 loc = got->contents + off;
10380 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10381 loc);
10382 }
10383 else
10384 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10385
10386 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10387 {
10388 outrel.r_addend += relocation;
10389 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10390 outrel.r_addend -= htab->elf.tls_sec->vma;
10391 }
10392 loc = relgot->contents;
10393 loc += (relgot->reloc_count++
10394 * sizeof (Elf64_External_Rela));
10395 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10396 }
10397
10398 /* Init the .got section contents here if we're not
10399 emitting a reloc. */
10400 else
10401 {
10402 relocation += addend;
10403 if (tls_type == (TLS_TLS | TLS_LD))
10404 relocation = 1;
10405 else if (tls_type != 0)
10406 {
10407 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10408 if (tls_type == (TLS_TLS | TLS_TPREL))
10409 relocation += DTP_OFFSET - TP_OFFSET;
10410
10411 if (tls_type == (TLS_TLS | TLS_GD))
10412 {
10413 bfd_put_64 (output_bfd, relocation,
10414 got->contents + off + 8);
10415 relocation = 1;
10416 }
10417 }
10418
10419 bfd_put_64 (output_bfd, relocation,
10420 got->contents + off);
10421 }
10422 }
10423
10424 if (off >= (bfd_vma) -2)
10425 abort ();
10426
10427 relocation = got->output_offset + off;
10428
10429 /* TOC base (r2) is TOC start plus 0x8000. */
10430 addend = -TOC_BASE_OFF;
10431 }
10432 break;
10433
10434 case R_PPC64_PLT16_HA:
10435 case R_PPC64_PLT16_HI:
10436 case R_PPC64_PLT16_LO:
10437 case R_PPC64_PLT32:
10438 case R_PPC64_PLT64:
10439 /* Relocation is to the entry for this symbol in the
10440 procedure linkage table. */
10441
10442 /* Resolve a PLT reloc against a local symbol directly,
10443 without using the procedure linkage table. */
10444 if (h == NULL)
10445 break;
10446
10447 /* It's possible that we didn't make a PLT entry for this
10448 symbol. This happens when statically linking PIC code,
10449 or when using -Bsymbolic. Go find a match if there is a
10450 PLT entry. */
10451 if (htab->plt != NULL)
10452 {
10453 struct plt_entry *ent;
10454 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10455 if (ent->addend == orig_addend
10456 && ent->plt.offset != (bfd_vma) -1)
10457 {
10458 relocation = (htab->plt->output_section->vma
10459 + htab->plt->output_offset
10460 + ent->plt.offset);
10461 unresolved_reloc = FALSE;
10462 }
10463 }
10464 break;
10465
10466 case R_PPC64_TOC:
10467 /* Relocation value is TOC base. */
10468 relocation = TOCstart;
10469 if (r_symndx == 0)
10470 relocation += htab->stub_group[input_section->id].toc_off;
10471 else if (unresolved_reloc)
10472 ;
10473 else if (sec != NULL && sec->id <= htab->top_id)
10474 relocation += htab->stub_group[sec->id].toc_off;
10475 else
10476 unresolved_reloc = TRUE;
10477 goto dodyn2;
10478
10479 /* TOC16 relocs. We want the offset relative to the TOC base,
10480 which is the address of the start of the TOC plus 0x8000.
10481 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10482 in this order. */
10483 case R_PPC64_TOC16:
10484 case R_PPC64_TOC16_LO:
10485 case R_PPC64_TOC16_HI:
10486 case R_PPC64_TOC16_DS:
10487 case R_PPC64_TOC16_LO_DS:
10488 case R_PPC64_TOC16_HA:
10489 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10490 break;
10491
10492 /* Relocate against the beginning of the section. */
10493 case R_PPC64_SECTOFF:
10494 case R_PPC64_SECTOFF_LO:
10495 case R_PPC64_SECTOFF_HI:
10496 case R_PPC64_SECTOFF_DS:
10497 case R_PPC64_SECTOFF_LO_DS:
10498 case R_PPC64_SECTOFF_HA:
10499 if (sec != NULL)
10500 addend -= sec->output_section->vma;
10501 break;
10502
10503 case R_PPC64_REL14:
10504 case R_PPC64_REL14_BRNTAKEN:
10505 case R_PPC64_REL14_BRTAKEN:
10506 case R_PPC64_REL24:
10507 break;
10508
10509 case R_PPC64_TPREL16:
10510 case R_PPC64_TPREL16_LO:
10511 case R_PPC64_TPREL16_HI:
10512 case R_PPC64_TPREL16_HA:
10513 case R_PPC64_TPREL16_DS:
10514 case R_PPC64_TPREL16_LO_DS:
10515 case R_PPC64_TPREL16_HIGHER:
10516 case R_PPC64_TPREL16_HIGHERA:
10517 case R_PPC64_TPREL16_HIGHEST:
10518 case R_PPC64_TPREL16_HIGHESTA:
10519 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10520 if (info->shared)
10521 /* The TPREL16 relocs shouldn't really be used in shared
10522 libs as they will result in DT_TEXTREL being set, but
10523 support them anyway. */
10524 goto dodyn;
10525 break;
10526
10527 case R_PPC64_DTPREL16:
10528 case R_PPC64_DTPREL16_LO:
10529 case R_PPC64_DTPREL16_HI:
10530 case R_PPC64_DTPREL16_HA:
10531 case R_PPC64_DTPREL16_DS:
10532 case R_PPC64_DTPREL16_LO_DS:
10533 case R_PPC64_DTPREL16_HIGHER:
10534 case R_PPC64_DTPREL16_HIGHERA:
10535 case R_PPC64_DTPREL16_HIGHEST:
10536 case R_PPC64_DTPREL16_HIGHESTA:
10537 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10538 break;
10539
10540 case R_PPC64_DTPMOD64:
10541 relocation = 1;
10542 addend = 0;
10543 goto dodyn;
10544
10545 case R_PPC64_TPREL64:
10546 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10547 goto dodyn;
10548
10549 case R_PPC64_DTPREL64:
10550 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10551 /* Fall thru */
10552
10553 /* Relocations that may need to be propagated if this is a
10554 dynamic object. */
10555 case R_PPC64_REL30:
10556 case R_PPC64_REL32:
10557 case R_PPC64_REL64:
10558 case R_PPC64_ADDR14:
10559 case R_PPC64_ADDR14_BRNTAKEN:
10560 case R_PPC64_ADDR14_BRTAKEN:
10561 case R_PPC64_ADDR16:
10562 case R_PPC64_ADDR16_DS:
10563 case R_PPC64_ADDR16_HA:
10564 case R_PPC64_ADDR16_HI:
10565 case R_PPC64_ADDR16_HIGHER:
10566 case R_PPC64_ADDR16_HIGHERA:
10567 case R_PPC64_ADDR16_HIGHEST:
10568 case R_PPC64_ADDR16_HIGHESTA:
10569 case R_PPC64_ADDR16_LO:
10570 case R_PPC64_ADDR16_LO_DS:
10571 case R_PPC64_ADDR24:
10572 case R_PPC64_ADDR32:
10573 case R_PPC64_ADDR64:
10574 case R_PPC64_UADDR16:
10575 case R_PPC64_UADDR32:
10576 case R_PPC64_UADDR64:
10577 /* r_symndx will be zero only for relocs against symbols
10578 from removed linkonce sections, or sections discarded by
10579 a linker script. */
10580 dodyn:
10581 if (r_symndx == 0)
10582 break;
10583 /* Fall thru. */
10584
10585 dodyn2:
10586 if ((input_section->flags & SEC_ALLOC) == 0)
10587 break;
10588
10589 if (NO_OPD_RELOCS && is_opd)
10590 break;
10591
10592 if ((info->shared
10593 && (h == NULL
10594 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10595 || h->elf.root.type != bfd_link_hash_undefweak)
10596 && (MUST_BE_DYN_RELOC (r_type)
10597 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10598 || (ELIMINATE_COPY_RELOCS
10599 && !info->shared
10600 && h != NULL
10601 && h->elf.dynindx != -1
10602 && !h->elf.non_got_ref
10603 && h->elf.def_dynamic
10604 && !h->elf.def_regular))
10605 {
10606 Elf_Internal_Rela outrel;
10607 bfd_boolean skip, relocate;
10608 asection *sreloc;
10609 bfd_byte *loc;
10610 bfd_vma out_off;
10611
10612 /* When generating a dynamic object, these relocations
10613 are copied into the output file to be resolved at run
10614 time. */
10615
10616 skip = FALSE;
10617 relocate = FALSE;
10618
10619 out_off = _bfd_elf_section_offset (output_bfd, info,
10620 input_section, rel->r_offset);
10621 if (out_off == (bfd_vma) -1)
10622 skip = TRUE;
10623 else if (out_off == (bfd_vma) -2)
10624 skip = TRUE, relocate = TRUE;
10625 out_off += (input_section->output_section->vma
10626 + input_section->output_offset);
10627 outrel.r_offset = out_off;
10628 outrel.r_addend = rel->r_addend;
10629
10630 /* Optimize unaligned reloc use. */
10631 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10632 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10633 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10634 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10635 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10636 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10637 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10638 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10639 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10640
10641 if (skip)
10642 memset (&outrel, 0, sizeof outrel);
10643 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10644 && !is_opd
10645 && r_type != R_PPC64_TOC)
10646 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10647 else
10648 {
10649 /* This symbol is local, or marked to become local,
10650 or this is an opd section reloc which must point
10651 at a local function. */
10652 outrel.r_addend += relocation;
10653 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10654 {
10655 if (is_opd && h != NULL)
10656 {
10657 /* Lie about opd entries. This case occurs
10658 when building shared libraries and we
10659 reference a function in another shared
10660 lib. The same thing happens for a weak
10661 definition in an application that's
10662 overridden by a strong definition in a
10663 shared lib. (I believe this is a generic
10664 bug in binutils handling of weak syms.)
10665 In these cases we won't use the opd
10666 entry in this lib. */
10667 unresolved_reloc = FALSE;
10668 }
10669 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10670
10671 /* We need to relocate .opd contents for ld.so.
10672 Prelink also wants simple and consistent rules
10673 for relocs. This make all RELATIVE relocs have
10674 *r_offset equal to r_addend. */
10675 relocate = TRUE;
10676 }
10677 else
10678 {
10679 long indx = 0;
10680
10681 if (bfd_is_abs_section (sec))
10682 ;
10683 else if (sec == NULL || sec->owner == NULL)
10684 {
10685 bfd_set_error (bfd_error_bad_value);
10686 return FALSE;
10687 }
10688 else
10689 {
10690 asection *osec;
10691
10692 osec = sec->output_section;
10693 indx = elf_section_data (osec)->dynindx;
10694
10695 /* We are turning this relocation into one
10696 against a section symbol, so subtract out
10697 the output section's address but not the
10698 offset of the input section in the output
10699 section. */
10700 outrel.r_addend -= osec->vma;
10701 }
10702
10703 outrel.r_info = ELF64_R_INFO (indx, r_type);
10704 }
10705 }
10706
10707 sreloc = elf_section_data (input_section)->sreloc;
10708 if (sreloc == NULL)
10709 abort ();
10710
10711 loc = sreloc->contents;
10712 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10713 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10714
10715 /* If this reloc is against an external symbol, it will
10716 be computed at runtime, so there's no need to do
10717 anything now. However, for the sake of prelink ensure
10718 that the section contents are a known value. */
10719 if (! relocate)
10720 {
10721 unresolved_reloc = FALSE;
10722 /* The value chosen here is quite arbitrary as ld.so
10723 ignores section contents except for the special
10724 case of .opd where the contents might be accessed
10725 before relocation. Choose zero, as that won't
10726 cause reloc overflow. */
10727 relocation = 0;
10728 addend = 0;
10729 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10730 to improve backward compatibility with older
10731 versions of ld. */
10732 if (r_type == R_PPC64_ADDR64)
10733 addend = outrel.r_addend;
10734 /* Adjust pc_relative relocs to have zero in *r_offset. */
10735 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10736 addend = (input_section->output_section->vma
10737 + input_section->output_offset
10738 + rel->r_offset);
10739 }
10740 }
10741 break;
10742
10743 case R_PPC64_COPY:
10744 case R_PPC64_GLOB_DAT:
10745 case R_PPC64_JMP_SLOT:
10746 case R_PPC64_RELATIVE:
10747 /* We shouldn't ever see these dynamic relocs in relocatable
10748 files. */
10749 /* Fall through. */
10750
10751 case R_PPC64_PLTGOT16:
10752 case R_PPC64_PLTGOT16_DS:
10753 case R_PPC64_PLTGOT16_HA:
10754 case R_PPC64_PLTGOT16_HI:
10755 case R_PPC64_PLTGOT16_LO:
10756 case R_PPC64_PLTGOT16_LO_DS:
10757 case R_PPC64_PLTREL32:
10758 case R_PPC64_PLTREL64:
10759 /* These ones haven't been implemented yet. */
10760
10761 (*_bfd_error_handler)
10762 (_("%B: relocation %s is not supported for symbol %s."),
10763 input_bfd,
10764 ppc64_elf_howto_table[r_type]->name, sym_name);
10765
10766 bfd_set_error (bfd_error_invalid_operation);
10767 ret = FALSE;
10768 continue;
10769 }
10770
10771 /* Do any further special processing. */
10772 switch (r_type)
10773 {
10774 default:
10775 break;
10776
10777 case R_PPC64_ADDR16_HA:
10778 case R_PPC64_ADDR16_HIGHERA:
10779 case R_PPC64_ADDR16_HIGHESTA:
10780 case R_PPC64_GOT16_HA:
10781 case R_PPC64_PLTGOT16_HA:
10782 case R_PPC64_PLT16_HA:
10783 case R_PPC64_TOC16_HA:
10784 case R_PPC64_SECTOFF_HA:
10785 case R_PPC64_TPREL16_HA:
10786 case R_PPC64_DTPREL16_HA:
10787 case R_PPC64_GOT_TLSGD16_HA:
10788 case R_PPC64_GOT_TLSLD16_HA:
10789 case R_PPC64_GOT_TPREL16_HA:
10790 case R_PPC64_GOT_DTPREL16_HA:
10791 case R_PPC64_TPREL16_HIGHER:
10792 case R_PPC64_TPREL16_HIGHERA:
10793 case R_PPC64_TPREL16_HIGHEST:
10794 case R_PPC64_TPREL16_HIGHESTA:
10795 case R_PPC64_DTPREL16_HIGHER:
10796 case R_PPC64_DTPREL16_HIGHERA:
10797 case R_PPC64_DTPREL16_HIGHEST:
10798 case R_PPC64_DTPREL16_HIGHESTA:
10799 /* It's just possible that this symbol is a weak symbol
10800 that's not actually defined anywhere. In that case,
10801 'sec' would be NULL, and we should leave the symbol
10802 alone (it will be set to zero elsewhere in the link). */
10803 if (sec != NULL)
10804 /* Add 0x10000 if sign bit in 0:15 is set.
10805 Bits 0:15 are not used. */
10806 addend += 0x8000;
10807 break;
10808
10809 case R_PPC64_ADDR16_DS:
10810 case R_PPC64_ADDR16_LO_DS:
10811 case R_PPC64_GOT16_DS:
10812 case R_PPC64_GOT16_LO_DS:
10813 case R_PPC64_PLT16_LO_DS:
10814 case R_PPC64_SECTOFF_DS:
10815 case R_PPC64_SECTOFF_LO_DS:
10816 case R_PPC64_TOC16_DS:
10817 case R_PPC64_TOC16_LO_DS:
10818 case R_PPC64_PLTGOT16_DS:
10819 case R_PPC64_PLTGOT16_LO_DS:
10820 case R_PPC64_GOT_TPREL16_DS:
10821 case R_PPC64_GOT_TPREL16_LO_DS:
10822 case R_PPC64_GOT_DTPREL16_DS:
10823 case R_PPC64_GOT_DTPREL16_LO_DS:
10824 case R_PPC64_TPREL16_DS:
10825 case R_PPC64_TPREL16_LO_DS:
10826 case R_PPC64_DTPREL16_DS:
10827 case R_PPC64_DTPREL16_LO_DS:
10828 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10829 mask = 3;
10830 /* If this reloc is against an lq insn, then the value must be
10831 a multiple of 16. This is somewhat of a hack, but the
10832 "correct" way to do this by defining _DQ forms of all the
10833 _DS relocs bloats all reloc switches in this file. It
10834 doesn't seem to make much sense to use any of these relocs
10835 in data, so testing the insn should be safe. */
10836 if ((insn & (0x3f << 26)) == (56u << 26))
10837 mask = 15;
10838 if (((relocation + addend) & mask) != 0)
10839 {
10840 (*_bfd_error_handler)
10841 (_("%B: error: relocation %s not a multiple of %d"),
10842 input_bfd,
10843 ppc64_elf_howto_table[r_type]->name,
10844 mask + 1);
10845 bfd_set_error (bfd_error_bad_value);
10846 ret = FALSE;
10847 continue;
10848 }
10849 break;
10850 }
10851
10852 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10853 because such sections are not SEC_ALLOC and thus ld.so will
10854 not process them. */
10855 if (unresolved_reloc
10856 && !((input_section->flags & SEC_DEBUGGING) != 0
10857 && h->elf.def_dynamic))
10858 {
10859 (*_bfd_error_handler)
10860 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10861 input_bfd,
10862 input_section,
10863 (long) rel->r_offset,
10864 ppc64_elf_howto_table[(int) r_type]->name,
10865 h->elf.root.root.string);
10866 ret = FALSE;
10867 }
10868
10869 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10870 input_bfd,
10871 input_section,
10872 contents,
10873 rel->r_offset,
10874 relocation,
10875 addend);
10876
10877 if (r != bfd_reloc_ok)
10878 {
10879 if (sym_name == NULL)
10880 sym_name = "(null)";
10881 if (r == bfd_reloc_overflow)
10882 {
10883 if (warned)
10884 continue;
10885 if (h != NULL
10886 && h->elf.root.type == bfd_link_hash_undefweak
10887 && ppc64_elf_howto_table[r_type]->pc_relative)
10888 {
10889 /* Assume this is a call protected by other code that
10890 detects the symbol is undefined. If this is the case,
10891 we can safely ignore the overflow. If not, the
10892 program is hosed anyway, and a little warning isn't
10893 going to help. */
10894
10895 continue;
10896 }
10897
10898 if (!((*info->callbacks->reloc_overflow)
10899 (info, (h ? &h->elf.root : NULL), sym_name,
10900 ppc64_elf_howto_table[r_type]->name,
10901 orig_addend, input_bfd, input_section, rel->r_offset)))
10902 return FALSE;
10903 }
10904 else
10905 {
10906 (*_bfd_error_handler)
10907 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10908 input_bfd,
10909 input_section,
10910 (long) rel->r_offset,
10911 ppc64_elf_howto_table[r_type]->name,
10912 sym_name,
10913 (int) r);
10914 ret = FALSE;
10915 }
10916 }
10917 }
10918
10919 /* If we're emitting relocations, then shortly after this function
10920 returns, reloc offsets and addends for this section will be
10921 adjusted. Worse, reloc symbol indices will be for the output
10922 file rather than the input. Save a copy of the relocs for
10923 opd_entry_value. */
10924 if (is_opd && (info->emitrelocations || info->relocatable))
10925 {
10926 bfd_size_type amt;
10927 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10928 rel = bfd_alloc (input_bfd, amt);
10929 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10930 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10931 if (rel == NULL)
10932 return FALSE;
10933 memcpy (rel, relocs, amt);
10934 }
10935 return ret;
10936 }
10937
10938 /* Adjust the value of any local symbols in opd sections. */
10939
10940 static bfd_boolean
10941 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10942 const char *name ATTRIBUTE_UNUSED,
10943 Elf_Internal_Sym *elfsym,
10944 asection *input_sec,
10945 struct elf_link_hash_entry *h)
10946 {
10947 long *opd_adjust, adjust;
10948 bfd_vma value;
10949
10950 if (h != NULL)
10951 return TRUE;
10952
10953 opd_adjust = get_opd_info (input_sec);
10954 if (opd_adjust == NULL)
10955 return TRUE;
10956
10957 value = elfsym->st_value - input_sec->output_offset;
10958 if (!info->relocatable)
10959 value -= input_sec->output_section->vma;
10960
10961 adjust = opd_adjust[value / 8];
10962 if (adjust == -1)
10963 elfsym->st_value = 0;
10964 else
10965 elfsym->st_value += adjust;
10966 return TRUE;
10967 }
10968
10969 /* Finish up dynamic symbol handling. We set the contents of various
10970 dynamic sections here. */
10971
10972 static bfd_boolean
10973 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10974 struct bfd_link_info *info,
10975 struct elf_link_hash_entry *h,
10976 Elf_Internal_Sym *sym)
10977 {
10978 struct ppc_link_hash_table *htab;
10979 bfd *dynobj;
10980 struct plt_entry *ent;
10981 Elf_Internal_Rela rela;
10982 bfd_byte *loc;
10983
10984 htab = ppc_hash_table (info);
10985 dynobj = htab->elf.dynobj;
10986
10987 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10988 if (ent->plt.offset != (bfd_vma) -1)
10989 {
10990 /* This symbol has an entry in the procedure linkage
10991 table. Set it up. */
10992
10993 if (htab->plt == NULL
10994 || htab->relplt == NULL
10995 || htab->glink == NULL)
10996 abort ();
10997
10998 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10999 fill in the PLT entry. */
11000 rela.r_offset = (htab->plt->output_section->vma
11001 + htab->plt->output_offset
11002 + ent->plt.offset);
11003 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11004 rela.r_addend = ent->addend;
11005
11006 loc = htab->relplt->contents;
11007 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11008 * sizeof (Elf64_External_Rela));
11009 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11010 }
11011
11012 if (h->needs_copy)
11013 {
11014 Elf_Internal_Rela rela;
11015 bfd_byte *loc;
11016
11017 /* This symbol needs a copy reloc. Set it up. */
11018
11019 if (h->dynindx == -1
11020 || (h->root.type != bfd_link_hash_defined
11021 && h->root.type != bfd_link_hash_defweak)
11022 || htab->relbss == NULL)
11023 abort ();
11024
11025 rela.r_offset = (h->root.u.def.value
11026 + h->root.u.def.section->output_section->vma
11027 + h->root.u.def.section->output_offset);
11028 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11029 rela.r_addend = 0;
11030 loc = htab->relbss->contents;
11031 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11032 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11033 }
11034
11035 /* Mark some specially defined symbols as absolute. */
11036 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11037 sym->st_shndx = SHN_ABS;
11038
11039 return TRUE;
11040 }
11041
11042 /* Used to decide how to sort relocs in an optimal manner for the
11043 dynamic linker, before writing them out. */
11044
11045 static enum elf_reloc_type_class
11046 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11047 {
11048 enum elf_ppc64_reloc_type r_type;
11049
11050 r_type = ELF64_R_TYPE (rela->r_info);
11051 switch (r_type)
11052 {
11053 case R_PPC64_RELATIVE:
11054 return reloc_class_relative;
11055 case R_PPC64_JMP_SLOT:
11056 return reloc_class_plt;
11057 case R_PPC64_COPY:
11058 return reloc_class_copy;
11059 default:
11060 return reloc_class_normal;
11061 }
11062 }
11063
11064 /* Finish up the dynamic sections. */
11065
11066 static bfd_boolean
11067 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11068 struct bfd_link_info *info)
11069 {
11070 struct ppc_link_hash_table *htab;
11071 bfd *dynobj;
11072 asection *sdyn;
11073
11074 htab = ppc_hash_table (info);
11075 dynobj = htab->elf.dynobj;
11076 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11077
11078 if (htab->elf.dynamic_sections_created)
11079 {
11080 Elf64_External_Dyn *dyncon, *dynconend;
11081
11082 if (sdyn == NULL || htab->got == NULL)
11083 abort ();
11084
11085 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11086 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11087 for (; dyncon < dynconend; dyncon++)
11088 {
11089 Elf_Internal_Dyn dyn;
11090 asection *s;
11091
11092 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11093
11094 switch (dyn.d_tag)
11095 {
11096 default:
11097 continue;
11098
11099 case DT_PPC64_GLINK:
11100 s = htab->glink;
11101 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11102 /* We stupidly defined DT_PPC64_GLINK to be the start
11103 of glink rather than the first entry point, which is
11104 what ld.so needs, and now have a bigger stub to
11105 support automatic multiple TOCs. */
11106 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11107 break;
11108
11109 case DT_PPC64_OPD:
11110 s = bfd_get_section_by_name (output_bfd, ".opd");
11111 if (s == NULL)
11112 continue;
11113 dyn.d_un.d_ptr = s->vma;
11114 break;
11115
11116 case DT_PPC64_OPDSZ:
11117 s = bfd_get_section_by_name (output_bfd, ".opd");
11118 if (s == NULL)
11119 continue;
11120 dyn.d_un.d_val = s->size;
11121 break;
11122
11123 case DT_PLTGOT:
11124 s = htab->plt;
11125 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11126 break;
11127
11128 case DT_JMPREL:
11129 s = htab->relplt;
11130 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11131 break;
11132
11133 case DT_PLTRELSZ:
11134 dyn.d_un.d_val = htab->relplt->size;
11135 break;
11136
11137 case DT_RELASZ:
11138 /* Don't count procedure linkage table relocs in the
11139 overall reloc count. */
11140 s = htab->relplt;
11141 if (s == NULL)
11142 continue;
11143 dyn.d_un.d_val -= s->size;
11144 break;
11145
11146 case DT_RELA:
11147 /* We may not be using the standard ELF linker script.
11148 If .rela.plt is the first .rela section, we adjust
11149 DT_RELA to not include it. */
11150 s = htab->relplt;
11151 if (s == NULL)
11152 continue;
11153 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11154 continue;
11155 dyn.d_un.d_ptr += s->size;
11156 break;
11157 }
11158
11159 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11160 }
11161 }
11162
11163 if (htab->got != NULL && htab->got->size != 0)
11164 {
11165 /* Fill in the first entry in the global offset table.
11166 We use it to hold the link-time TOCbase. */
11167 bfd_put_64 (output_bfd,
11168 elf_gp (output_bfd) + TOC_BASE_OFF,
11169 htab->got->contents);
11170
11171 /* Set .got entry size. */
11172 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11173 }
11174
11175 if (htab->plt != NULL && htab->plt->size != 0)
11176 {
11177 /* Set .plt entry size. */
11178 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11179 = PLT_ENTRY_SIZE;
11180 }
11181
11182 /* We need to handle writing out multiple GOT sections ourselves,
11183 since we didn't add them to DYNOBJ. We know dynobj is the first
11184 bfd. */
11185 while ((dynobj = dynobj->link_next) != NULL)
11186 {
11187 asection *s;
11188
11189 if (!is_ppc64_elf_target (dynobj->xvec))
11190 continue;
11191
11192 s = ppc64_elf_tdata (dynobj)->got;
11193 if (s != NULL
11194 && s->size != 0
11195 && s->output_section != bfd_abs_section_ptr
11196 && !bfd_set_section_contents (output_bfd, s->output_section,
11197 s->contents, s->output_offset,
11198 s->size))
11199 return FALSE;
11200 s = ppc64_elf_tdata (dynobj)->relgot;
11201 if (s != NULL
11202 && s->size != 0
11203 && s->output_section != bfd_abs_section_ptr
11204 && !bfd_set_section_contents (output_bfd, s->output_section,
11205 s->contents, s->output_offset,
11206 s->size))
11207 return FALSE;
11208 }
11209
11210 return TRUE;
11211 }
11212
11213 #include "elf64-target.h"
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