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2005-01-21 Fred Fish <fnf@specifixinc.com>
[binutils.git] / bfd / elf64-ppc.c
blob2f30dd53d5fd56c654238946a3d6cf00d565617b
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
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 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
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 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])));
2123 cache_ptr->howto = ppc64_elf_howto_table[type];
2124 }
2125
2126 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 /* If this is a relocatable link (output_bfd test tells us), just
2134 call the generic function. Any adjustment will be done at final
2135 link time. */
2136 if (output_bfd != NULL)
2137 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2138 input_section, output_bfd, error_message);
2139
2140 /* Adjust the addend for sign extension of the low 16 bits.
2141 We won't actually be using the low 16 bits, so trashing them
2142 doesn't matter. */
2143 reloc_entry->addend += 0x8000;
2144 return bfd_reloc_continue;
2145 }
2146
2147 static bfd_reloc_status_type
2148 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2149 void *data, asection *input_section,
2150 bfd *output_bfd, char **error_message)
2151 {
2152 if (output_bfd != NULL)
2153 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2154 input_section, output_bfd, error_message);
2155
2156 if (strcmp (symbol->section->name, ".opd") == 0
2157 && (symbol->section->owner->flags & DYNAMIC) == 0)
2158 {
2159 bfd_vma dest = opd_entry_value (symbol->section,
2160 symbol->value + reloc_entry->addend,
2161 NULL, NULL);
2162 if (dest != (bfd_vma) -1)
2163 reloc_entry->addend = dest - (symbol->value
2164 + symbol->section->output_section->vma
2165 + symbol->section->output_offset);
2166 }
2167 return bfd_reloc_continue;
2168 }
2169
2170 static bfd_reloc_status_type
2171 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2172 void *data, asection *input_section,
2173 bfd *output_bfd, char **error_message)
2174 {
2175 long insn;
2176 enum elf_ppc64_reloc_type r_type;
2177 bfd_size_type octets;
2178 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2179 bfd_boolean is_power4 = FALSE;
2180
2181 /* If this is a relocatable link (output_bfd test tells us), just
2182 call the generic function. Any adjustment will be done at final
2183 link time. */
2184 if (output_bfd != NULL)
2185 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2186 input_section, output_bfd, error_message);
2187
2188 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2189 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2190 insn &= ~(0x01 << 21);
2191 r_type = reloc_entry->howto->type;
2192 if (r_type == R_PPC64_ADDR14_BRTAKEN
2193 || r_type == R_PPC64_REL14_BRTAKEN)
2194 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2195
2196 if (is_power4)
2197 {
2198 /* Set 'a' bit. This is 0b00010 in BO field for branch
2199 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2200 for branch on CTR insns (BO == 1a00t or 1a01t). */
2201 if ((insn & (0x14 << 21)) == (0x04 << 21))
2202 insn |= 0x02 << 21;
2203 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2204 insn |= 0x08 << 21;
2205 else
2206 goto out;
2207 }
2208 else
2209 {
2210 bfd_vma target = 0;
2211 bfd_vma from;
2212
2213 if (!bfd_is_com_section (symbol->section))
2214 target = symbol->value;
2215 target += symbol->section->output_section->vma;
2216 target += symbol->section->output_offset;
2217 target += reloc_entry->addend;
2218
2219 from = (reloc_entry->address
2220 + input_section->output_offset
2221 + input_section->output_section->vma);
2222
2223 /* Invert 'y' bit if not the default. */
2224 if ((bfd_signed_vma) (target - from) < 0)
2225 insn ^= 0x01 << 21;
2226 }
2227 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2228 out:
2229 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2230 input_section, output_bfd, error_message);
2231 }
2232
2233 static bfd_reloc_status_type
2234 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2235 void *data, asection *input_section,
2236 bfd *output_bfd, char **error_message)
2237 {
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 /* Subtract the symbol section base address. */
2246 reloc_entry->addend -= symbol->section->output_section->vma;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 /* If this is a relocatable link (output_bfd test tells us), just
2256 call the generic function. Any adjustment will be done at final
2257 link time. */
2258 if (output_bfd != NULL)
2259 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2260 input_section, output_bfd, error_message);
2261
2262 /* Subtract the symbol section base address. */
2263 reloc_entry->addend -= symbol->section->output_section->vma;
2264
2265 /* Adjust the addend for sign extension of the low 16 bits. */
2266 reloc_entry->addend += 0x8000;
2267 return bfd_reloc_continue;
2268 }
2269
2270 static bfd_reloc_status_type
2271 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2272 void *data, asection *input_section,
2273 bfd *output_bfd, char **error_message)
2274 {
2275 bfd_vma TOCstart;
2276
2277 /* If this is a relocatable link (output_bfd test tells us), just
2278 call the generic function. Any adjustment will be done at final
2279 link time. */
2280 if (output_bfd != NULL)
2281 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2282 input_section, output_bfd, error_message);
2283
2284 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2285 if (TOCstart == 0)
2286 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2287
2288 /* Subtract the TOC base address. */
2289 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2290 return bfd_reloc_continue;
2291 }
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 bfd_vma TOCstart;
2299
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2308 if (TOCstart == 0)
2309 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2310
2311 /* Subtract the TOC base address. */
2312 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2313
2314 /* Adjust the addend for sign extension of the low 16 bits. */
2315 reloc_entry->addend += 0x8000;
2316 return bfd_reloc_continue;
2317 }
2318
2319 static bfd_reloc_status_type
2320 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2321 void *data, asection *input_section,
2322 bfd *output_bfd, char **error_message)
2323 {
2324 bfd_vma TOCstart;
2325 bfd_size_type octets;
2326
2327 /* If this is a relocatable link (output_bfd test tells us), just
2328 call the generic function. Any adjustment will be done at final
2329 link time. */
2330 if (output_bfd != NULL)
2331 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2332 input_section, output_bfd, error_message);
2333
2334 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2335 if (TOCstart == 0)
2336 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2337
2338 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2339 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2340 return bfd_reloc_ok;
2341 }
2342
2343 static bfd_reloc_status_type
2344 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2345 void *data, asection *input_section,
2346 bfd *output_bfd, char **error_message)
2347 {
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 if (error_message != NULL)
2356 {
2357 static char buf[60];
2358 sprintf (buf, "generic linker can't handle %s",
2359 reloc_entry->howto->name);
2360 *error_message = buf;
2361 }
2362 return bfd_reloc_dangerous;
2363 }
2364
2365 struct ppc64_elf_obj_tdata
2366 {
2367 struct elf_obj_tdata elf;
2368
2369 /* Shortcuts to dynamic linker sections. */
2370 asection *got;
2371 asection *relgot;
2372
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2378 sections means we potentially need one of these for each input bfd. */
2379 union {
2380 bfd_signed_vma refcount;
2381 bfd_vma offset;
2382 } tlsld_got;
2383
2384 /* A copy of relocs before they are modified for --emit-relocs. */
2385 Elf_Internal_Rela *opd_relocs;
2386 };
2387
2388 #define ppc64_elf_tdata(bfd) \
2389 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2390
2391 #define ppc64_tlsld_got(bfd) \
2392 (&ppc64_elf_tdata (bfd)->tlsld_got)
2393
2394 /* Override the generic function because we store some extras. */
2395
2396 static bfd_boolean
2397 ppc64_elf_mkobject (bfd *abfd)
2398 {
2399 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2400 abfd->tdata.any = bfd_zalloc (abfd, amt);
2401 if (abfd->tdata.any == NULL)
2402 return FALSE;
2403 return TRUE;
2404 }
2405
2406 /* Return 1 if target is one of ours. */
2407
2408 static bfd_boolean
2409 is_ppc64_elf_target (const struct bfd_target *targ)
2410 {
2411 extern const bfd_target bfd_elf64_powerpc_vec;
2412 extern const bfd_target bfd_elf64_powerpcle_vec;
2413
2414 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2415 }
2416
2417 /* Fix bad default arch selected for a 64 bit input bfd when the
2418 default is 32 bit. */
2419
2420 static bfd_boolean
2421 ppc64_elf_object_p (bfd *abfd)
2422 {
2423 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2424 {
2425 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2426
2427 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2428 {
2429 /* Relies on arch after 32 bit default being 64 bit default. */
2430 abfd->arch_info = abfd->arch_info->next;
2431 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2432 }
2433 }
2434 return TRUE;
2435 }
2436
2437 /* Support for core dump NOTE sections. */
2438
2439 static bfd_boolean
2440 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2441 {
2442 size_t offset, size;
2443
2444 if (note->descsz != 504)
2445 return FALSE;
2446
2447 /* pr_cursig */
2448 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2449
2450 /* pr_pid */
2451 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2452
2453 /* pr_reg */
2454 offset = 112;
2455 size = 384;
2456
2457 /* Make a ".reg/999" section. */
2458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2459 size, note->descpos + offset);
2460 }
2461
2462 static bfd_boolean
2463 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2464 {
2465 if (note->descsz != 136)
2466 return FALSE;
2467
2468 elf_tdata (abfd)->core_program
2469 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2470 elf_tdata (abfd)->core_command
2471 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2472
2473 return TRUE;
2474 }
2475
2476 /* Merge backend specific data from an object file to the output
2477 object file when linking. */
2478
2479 static bfd_boolean
2480 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2481 {
2482 /* Check if we have the same endianess. */
2483 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2484 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2485 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2486 {
2487 const char *msg;
2488
2489 if (bfd_big_endian (ibfd))
2490 msg = _("%B: compiled for a big endian system "
2491 "and target is little endian");
2492 else
2493 msg = _("%B: compiled for a little endian system "
2494 "and target is big endian");
2495
2496 (*_bfd_error_handler) (msg, ibfd);
2497
2498 bfd_set_error (bfd_error_wrong_format);
2499 return FALSE;
2500 }
2501
2502 return TRUE;
2503 }
2504
2505 /* Add extra PPC sections. */
2506
2507 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2508 {
2509 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2510 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2511 { ".plt", 4, 0, SHT_NOBITS, 0 },
2512 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2513 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2514 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 struct _ppc64_elf_section_data
2519 {
2520 struct bfd_elf_section_data elf;
2521
2522 /* An array with one entry for each opd function descriptor. */
2523 union
2524 {
2525 /* Points to the function code section for local opd entries. */
2526 asection **func_sec;
2527 /* After editing .opd, adjust references to opd local syms. */
2528 long *adjust;
2529 } opd;
2530
2531 /* An array for toc sections, indexed by offset/8.
2532 Specifies the relocation symbol index used at a given toc offset. */
2533 unsigned *t_symndx;
2534 };
2535
2536 #define ppc64_elf_section_data(sec) \
2537 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2538
2539 static bfd_boolean
2540 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2541 {
2542 struct _ppc64_elf_section_data *sdata;
2543 bfd_size_type amt = sizeof (*sdata);
2544
2545 sdata = bfd_zalloc (abfd, amt);
2546 if (sdata == NULL)
2547 return FALSE;
2548 sec->used_by_bfd = sdata;
2549
2550 return _bfd_elf_new_section_hook (abfd, sec);
2551 }
2552
2553 static void *
2554 get_opd_info (asection * sec)
2555 {
2556 if (sec != NULL
2557 && ppc64_elf_section_data (sec) != NULL
2558 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2559 return ppc64_elf_section_data (sec)->opd.adjust;
2560 return NULL;
2561 }
2562 \f
2563 /* Parameters for the qsort hook. */
2564 static asection *synthetic_opd;
2565 static bfd_boolean synthetic_relocatable;
2566
2567 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2568
2569 static int
2570 compare_symbols (const void *ap, const void *bp)
2571 {
2572 const asymbol *a = * (const asymbol **) ap;
2573 const asymbol *b = * (const asymbol **) bp;
2574
2575 /* Section symbols first. */
2576 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2577 return -1;
2578 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2579 return 1;
2580
2581 /* then .opd symbols. */
2582 if (a->section == synthetic_opd && b->section != synthetic_opd)
2583 return -1;
2584 if (a->section != synthetic_opd && b->section == synthetic_opd)
2585 return 1;
2586
2587 /* then other code symbols. */
2588 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2589 == (SEC_CODE | SEC_ALLOC)
2590 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2591 != (SEC_CODE | SEC_ALLOC))
2592 return -1;
2593
2594 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2595 != (SEC_CODE | SEC_ALLOC)
2596 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2597 == (SEC_CODE | SEC_ALLOC))
2598 return 1;
2599
2600 if (synthetic_relocatable)
2601 {
2602 if (a->section->id < b->section->id)
2603 return -1;
2604
2605 if (a->section->id > b->section->id)
2606 return 1;
2607 }
2608
2609 if (a->value + a->section->vma < b->value + b->section->vma)
2610 return -1;
2611
2612 if (a->value + a->section->vma > b->value + b->section->vma)
2613 return 1;
2614
2615 return 0;
2616 }
2617
2618 /* Search SYMS for a symbol of the given VALUE. */
2619
2620 static asymbol *
2621 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2622 {
2623 long mid;
2624
2625 if (id == -1)
2626 {
2627 while (lo < hi)
2628 {
2629 mid = (lo + hi) >> 1;
2630 if (syms[mid]->value + syms[mid]->section->vma < value)
2631 lo = mid + 1;
2632 else if (syms[mid]->value + syms[mid]->section->vma > value)
2633 hi = mid;
2634 else
2635 return syms[mid];
2636 }
2637 }
2638 else
2639 {
2640 while (lo < hi)
2641 {
2642 mid = (lo + hi) >> 1;
2643 if (syms[mid]->section->id < id)
2644 lo = mid + 1;
2645 else if (syms[mid]->section->id > id)
2646 hi = mid;
2647 else if (syms[mid]->value < value)
2648 lo = mid + 1;
2649 else if (syms[mid]->value > value)
2650 hi = mid;
2651 else
2652 return syms[mid];
2653 }
2654 }
2655 return NULL;
2656 }
2657
2658 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2659 entry syms. */
2660
2661 static long
2662 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2663 long static_count, asymbol **static_syms,
2664 long dyn_count, asymbol **dyn_syms,
2665 asymbol **ret)
2666 {
2667 asymbol *s;
2668 long i;
2669 long count;
2670 char *names;
2671 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2672 asection *opd;
2673 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2674 asymbol **syms;
2675
2676 *ret = NULL;
2677
2678 opd = bfd_get_section_by_name (abfd, ".opd");
2679 if (opd == NULL)
2680 return 0;
2681
2682 symcount = static_count;
2683 if (!relocatable)
2684 symcount += dyn_count;
2685 if (symcount == 0)
2686 return 0;
2687
2688 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2689 if (syms == NULL)
2690 return 0;
2691
2692 if (!relocatable && static_count != 0 && dyn_count != 0)
2693 {
2694 /* Use both symbol tables. */
2695 memcpy (syms, static_syms, static_count * sizeof (*syms));
2696 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2697 }
2698 else if (!relocatable && static_count == 0)
2699 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2700 else
2701 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2702
2703 synthetic_opd = opd;
2704 synthetic_relocatable = relocatable;
2705 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2706
2707 if (!relocatable && symcount > 1)
2708 {
2709 long j;
2710 /* Trim duplicate syms, since we may have merged the normal and
2711 dynamic symbols. Actually, we only care about syms that have
2712 different values, so trim any with the same value. */
2713 for (i = 1, j = 1; i < symcount; ++i)
2714 if (syms[i - 1]->value + syms[i - 1]->section->vma
2715 != syms[i]->value + syms[i]->section->vma)
2716 syms[j++] = syms[i];
2717 symcount = j;
2718 }
2719
2720 i = 0;
2721 if (syms[i]->section == opd)
2722 ++i;
2723 codesecsym = i;
2724
2725 for (; i < symcount; ++i)
2726 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2727 != (SEC_CODE | SEC_ALLOC))
2728 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2729 break;
2730 codesecsymend = i;
2731
2732 for (; i < symcount; ++i)
2733 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2734 break;
2735 secsymend = i;
2736
2737 for (; i < symcount; ++i)
2738 if (syms[i]->section != opd)
2739 break;
2740 opdsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2744 != (SEC_CODE | SEC_ALLOC))
2745 break;
2746 symcount = i;
2747
2748 count = 0;
2749 if (opdsymend == secsymend)
2750 goto done;
2751
2752 if (relocatable)
2753 {
2754 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2755 arelent *r;
2756 size_t size;
2757 long relcount;
2758
2759 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2760 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2761
2762 if (! relcount
2763 || ! (*slurp_relocs) (abfd, opd, static_syms, FALSE))
2764 goto done;
2765
2766 size = 0;
2767 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2768 {
2769 asymbol *sym;
2770
2771 while (r < opd->relocation + relcount
2772 && r->address < syms[i]->value + opd->vma)
2773 ++r;
2774
2775 if (r == opd->relocation + relcount)
2776 break;
2777
2778 if (r->address != syms[i]->value + opd->vma)
2779 continue;
2780
2781 if (r->howto->type != R_PPC64_ADDR64)
2782 continue;
2783
2784 sym = *r->sym_ptr_ptr;
2785 if (!sym_exists_at (syms, opdsymend, symcount,
2786 sym->section->id, sym->value + r->addend))
2787 {
2788 ++count;
2789 size += sizeof (asymbol);
2790 size += strlen (syms[i]->name) + 2;
2791 }
2792 }
2793
2794 s = *ret = bfd_malloc (size);
2795 if (s == NULL)
2796 {
2797 count = 0;
2798 goto done;
2799 }
2800
2801 names = (char *) (s + count);
2802
2803 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2804 {
2805 asymbol *sym;
2806
2807 while (r < opd->relocation + relcount
2808 && r->address < syms[i]->value + opd->vma)
2809 ++r;
2810
2811 if (r == opd->relocation + relcount)
2812 break;
2813
2814 if (r->address != syms[i]->value + opd->vma)
2815 continue;
2816
2817 if (r->howto->type != R_PPC64_ADDR64)
2818 continue;
2819
2820 sym = *r->sym_ptr_ptr;
2821 if (!sym_exists_at (syms, opdsymend, symcount,
2822 sym->section->id, sym->value + r->addend))
2823 {
2824 size_t len;
2825
2826 *s = *syms[i];
2827 s->section = sym->section;
2828 s->value = sym->value + r->addend;
2829 s->name = names;
2830 *names++ = '.';
2831 len = strlen (syms[i]->name);
2832 memcpy (names, syms[i]->name, len + 1);
2833 names += len + 1;
2834 s++;
2835 }
2836 }
2837 }
2838 else
2839 {
2840 bfd_byte *contents;
2841 size_t size;
2842
2843 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2844 {
2845 if (contents)
2846 {
2847 free_contents_and_exit:
2848 free (contents);
2849 }
2850 goto done;
2851 }
2852
2853 size = 0;
2854 for (i = secsymend; i < opdsymend; ++i)
2855 {
2856 bfd_vma ent;
2857
2858 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2859 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2860 {
2861 ++count;
2862 size += sizeof (asymbol);
2863 size += strlen (syms[i]->name) + 2;
2864 }
2865 }
2866
2867 s = *ret = bfd_malloc (size);
2868 if (s == NULL)
2869 {
2870 count = 0;
2871 goto free_contents_and_exit;
2872 }
2873
2874 names = (char *) (s + count);
2875
2876 for (i = secsymend; i < opdsymend; ++i)
2877 {
2878 bfd_vma ent;
2879
2880 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2881 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2882 {
2883 long lo, hi;
2884 size_t len;
2885 asection *sec = abfd->sections;
2886
2887 *s = *syms[i];
2888 lo = codesecsym;
2889 hi = codesecsymend;
2890 while (lo < hi)
2891 {
2892 long mid = (lo + hi) >> 1;
2893 if (syms[mid]->section->vma < ent)
2894 lo = mid + 1;
2895 else if (syms[mid]->section->vma > ent)
2896 hi = mid;
2897 else
2898 {
2899 sec = syms[mid]->section;
2900 break;
2901 }
2902 }
2903
2904 if (lo >= hi && lo > codesecsym)
2905 sec = syms[lo - 1]->section;
2906
2907 for (; sec != NULL; sec = sec->next)
2908 {
2909 if (sec->vma > ent)
2910 break;
2911 if ((sec->flags & SEC_ALLOC) == 0
2912 || (sec->flags & SEC_LOAD) == 0)
2913 break;
2914 if ((sec->flags & SEC_CODE) != 0)
2915 s->section = sec;
2916 }
2917 s->value = ent - s->section->vma;
2918 s->name = names;
2919 *names++ = '.';
2920 len = strlen (syms[i]->name);
2921 memcpy (names, syms[i]->name, len + 1);
2922 names += len + 1;
2923 s++;
2924 }
2925 }
2926 free (contents);
2927 }
2928
2929 done:
2930 free (syms);
2931 return count;
2932 }
2933 \f
2934 /* The following functions are specific to the ELF linker, while
2935 functions above are used generally. Those named ppc64_elf_* are
2936 called by the main ELF linker code. They appear in this file more
2937 or less in the order in which they are called. eg.
2938 ppc64_elf_check_relocs is called early in the link process,
2939 ppc64_elf_finish_dynamic_sections is one of the last functions
2940 called.
2941
2942 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2943 functions have both a function code symbol and a function descriptor
2944 symbol. A call to foo in a relocatable object file looks like:
2945
2946 . .text
2947 . x:
2948 . bl .foo
2949 . nop
2950
2951 The function definition in another object file might be:
2952
2953 . .section .opd
2954 . foo: .quad .foo
2955 . .quad .TOC.@tocbase
2956 . .quad 0
2957 .
2958 . .text
2959 . .foo: blr
2960
2961 When the linker resolves the call during a static link, the branch
2962 unsurprisingly just goes to .foo and the .opd information is unused.
2963 If the function definition is in a shared library, things are a little
2964 different: The call goes via a plt call stub, the opd information gets
2965 copied to the plt, and the linker patches the nop.
2966
2967 . x:
2968 . bl .foo_stub
2969 . ld 2,40(1)
2970 .
2971 .
2972 . .foo_stub:
2973 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2974 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2975 . std 2,40(1) # this is the general idea
2976 . ld 11,0(12)
2977 . ld 2,8(12)
2978 . mtctr 11
2979 . ld 11,16(12)
2980 . bctr
2981 .
2982 . .section .plt
2983 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2984
2985 The "reloc ()" notation is supposed to indicate that the linker emits
2986 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2987 copying.
2988
2989 What are the difficulties here? Well, firstly, the relocations
2990 examined by the linker in check_relocs are against the function code
2991 sym .foo, while the dynamic relocation in the plt is emitted against
2992 the function descriptor symbol, foo. Somewhere along the line, we need
2993 to carefully copy dynamic link information from one symbol to the other.
2994 Secondly, the generic part of the elf linker will make .foo a dynamic
2995 symbol as is normal for most other backends. We need foo dynamic
2996 instead, at least for an application final link. However, when
2997 creating a shared library containing foo, we need to have both symbols
2998 dynamic so that references to .foo are satisfied during the early
2999 stages of linking. Otherwise the linker might decide to pull in a
3000 definition from some other object, eg. a static library.
3001
3002 Update: As of August 2004, we support a new convention. Function
3003 calls may use the function descriptor symbol, ie. "bl foo". This
3004 behaves exactly as "bl .foo". */
3005
3006 /* The linker needs to keep track of the number of relocs that it
3007 decides to copy as dynamic relocs in check_relocs for each symbol.
3008 This is so that it can later discard them if they are found to be
3009 unnecessary. We store the information in a field extending the
3010 regular ELF linker hash table. */
3011
3012 struct ppc_dyn_relocs
3013 {
3014 struct ppc_dyn_relocs *next;
3015
3016 /* The input section of the reloc. */
3017 asection *sec;
3018
3019 /* Total number of relocs copied for the input section. */
3020 bfd_size_type count;
3021
3022 /* Number of pc-relative relocs copied for the input section. */
3023 bfd_size_type pc_count;
3024 };
3025
3026 /* Track GOT entries needed for a given symbol. We might need more
3027 than one got entry per symbol. */
3028 struct got_entry
3029 {
3030 struct got_entry *next;
3031
3032 /* The symbol addend that we'll be placing in the GOT. */
3033 bfd_vma addend;
3034
3035 /* Unlike other ELF targets, we use separate GOT entries for the same
3036 symbol referenced from different input files. This is to support
3037 automatic multiple TOC/GOT sections, where the TOC base can vary
3038 from one input file to another.
3039
3040 Point to the BFD owning this GOT entry. */
3041 bfd *owner;
3042
3043 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3044 TLS_TPREL or TLS_DTPREL for tls entries. */
3045 char tls_type;
3046
3047 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } got;
3053 };
3054
3055 /* The same for PLT. */
3056 struct plt_entry
3057 {
3058 struct plt_entry *next;
3059
3060 bfd_vma addend;
3061
3062 union
3063 {
3064 bfd_signed_vma refcount;
3065 bfd_vma offset;
3066 } plt;
3067 };
3068
3069 /* Of those relocs that might be copied as dynamic relocs, this macro
3070 selects those that must be copied when linking a shared library,
3071 even when the symbol is local. */
3072
3073 #define MUST_BE_DYN_RELOC(RTYPE) \
3074 ((RTYPE) != R_PPC64_REL32 \
3075 && (RTYPE) != R_PPC64_REL64 \
3076 && (RTYPE) != R_PPC64_REL30)
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. With code that gcc generates, it's vital that this be
3082 enabled; In the PowerPC64 ABI, the address of a function is actually
3083 the address of a function descriptor, which resides in the .opd
3084 section. gcc uses the descriptor directly rather than going via the
3085 GOT as some other ABI's do, which means that initialized function
3086 pointers must reference the descriptor. Thus, a function pointer
3087 initialized to the address of a function in a shared library will
3088 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3089 redefines the function descriptor symbol to point to the copy. This
3090 presents a problem as a plt entry for that function is also
3091 initialized from the function descriptor symbol and the copy reloc
3092 may not be initialized first. */
3093 #define ELIMINATE_COPY_RELOCS 1
3094
3095 /* Section name for stubs is the associated section name plus this
3096 string. */
3097 #define STUB_SUFFIX ".stub"
3098
3099 /* Linker stubs.
3100 ppc_stub_long_branch:
3101 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3102 destination, but a 24 bit branch in a stub section will reach.
3103 . b dest
3104
3105 ppc_stub_plt_branch:
3106 Similar to the above, but a 24 bit branch in the stub section won't
3107 reach its destination.
3108 . addis %r12,%r2,xxx@toc@ha
3109 . ld %r11,xxx@toc@l(%r12)
3110 . mtctr %r11
3111 . bctr
3112
3113 ppc_stub_plt_call:
3114 Used to call a function in a shared library. If it so happens that
3115 the plt entry referenced crosses a 64k boundary, then an extra
3116 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3117 xxx+16 as appropriate.
3118 . addis %r12,%r2,xxx@toc@ha
3119 . std %r2,40(%r1)
3120 . ld %r11,xxx+0@toc@l(%r12)
3121 . ld %r2,xxx+8@toc@l(%r12)
3122 . mtctr %r11
3123 . ld %r11,xxx+16@toc@l(%r12)
3124 . bctr
3125
3126 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3127 code to adjust the value and save r2 to support multiple toc sections.
3128 A ppc_stub_long_branch with an r2 offset looks like:
3129 . std %r2,40(%r1)
3130 . addis %r2,%r2,off@ha
3131 . addi %r2,%r2,off@l
3132 . b dest
3133
3134 A ppc_stub_plt_branch with an r2 offset looks like:
3135 . std %r2,40(%r1)
3136 . addis %r12,%r2,xxx@toc@ha
3137 . ld %r11,xxx@toc@l(%r12)
3138 . addis %r2,%r2,off@ha
3139 . addi %r2,%r2,off@l
3140 . mtctr %r11
3141 . bctr
3142 */
3143
3144 enum ppc_stub_type {
3145 ppc_stub_none,
3146 ppc_stub_long_branch,
3147 ppc_stub_long_branch_r2off,
3148 ppc_stub_plt_branch,
3149 ppc_stub_plt_branch_r2off,
3150 ppc_stub_plt_call
3151 };
3152
3153 struct ppc_stub_hash_entry {
3154
3155 /* Base hash table entry structure. */
3156 struct bfd_hash_entry root;
3157
3158 enum ppc_stub_type stub_type;
3159
3160 /* The stub section. */
3161 asection *stub_sec;
3162
3163 /* Offset within stub_sec of the beginning of this stub. */
3164 bfd_vma stub_offset;
3165
3166 /* Given the symbol's value and its section we can determine its final
3167 value when building the stubs (so the stub knows where to jump. */
3168 bfd_vma target_value;
3169 asection *target_section;
3170
3171 /* The symbol table entry, if any, that this was derived from. */
3172 struct ppc_link_hash_entry *h;
3173
3174 /* And the reloc addend that this was derived from. */
3175 bfd_vma addend;
3176
3177 /* Where this stub is being called from, or, in the case of combined
3178 stub sections, the first input section in the group. */
3179 asection *id_sec;
3180 };
3181
3182 struct ppc_branch_hash_entry {
3183
3184 /* Base hash table entry structure. */
3185 struct bfd_hash_entry root;
3186
3187 /* Offset within .branch_lt. */
3188 unsigned int offset;
3189
3190 /* Generation marker. */
3191 unsigned int iter;
3192 };
3193
3194 struct ppc_link_hash_entry
3195 {
3196 struct elf_link_hash_entry elf;
3197
3198 /* A pointer to the most recently used stub hash entry against this
3199 symbol. */
3200 struct ppc_stub_hash_entry *stub_cache;
3201
3202 /* Track dynamic relocs copied for this symbol. */
3203 struct ppc_dyn_relocs *dyn_relocs;
3204
3205 /* Link between function code and descriptor symbols. */
3206 struct ppc_link_hash_entry *oh;
3207
3208 /* Flag function code and descriptor symbols. */
3209 unsigned int is_func:1;
3210 unsigned int is_func_descriptor:1;
3211
3212 /* Whether global opd/toc sym has been adjusted or not.
3213 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3214 should be set for all globals defined in any opd/toc section. */
3215 unsigned int adjust_done:1;
3216
3217 /* Set if we twiddled this symbol to weak at some stage. */
3218 unsigned int was_undefined:1;
3219
3220 /* Contexts in which symbol is used in the GOT (or TOC).
3221 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3222 corresponding relocs are encountered during check_relocs.
3223 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3224 indicate the corresponding GOT entry type is not needed.
3225 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3226 a TPREL one. We use a separate flag rather than setting TPREL
3227 just for convenience in distinguishing the two cases. */
3228 #define TLS_GD 1 /* GD reloc. */
3229 #define TLS_LD 2 /* LD reloc. */
3230 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3231 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3232 #define TLS_TLS 16 /* Any TLS reloc. */
3233 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3234 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3235 char tls_mask;
3236 };
3237
3238 /* ppc64 ELF linker hash table. */
3239
3240 struct ppc_link_hash_table
3241 {
3242 struct elf_link_hash_table elf;
3243
3244 /* The stub hash table. */
3245 struct bfd_hash_table stub_hash_table;
3246
3247 /* Another hash table for plt_branch stubs. */
3248 struct bfd_hash_table branch_hash_table;
3249
3250 /* Linker stub bfd. */
3251 bfd *stub_bfd;
3252
3253 /* Linker call-backs. */
3254 asection * (*add_stub_section) (const char *, asection *);
3255 void (*layout_sections_again) (void);
3256
3257 /* Array to keep track of which stub sections have been created, and
3258 information on stub grouping. */
3259 struct map_stub {
3260 /* This is the section to which stubs in the group will be attached. */
3261 asection *link_sec;
3262 /* The stub section. */
3263 asection *stub_sec;
3264 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3265 bfd_vma toc_off;
3266 } *stub_group;
3267
3268 /* Temp used when calculating TOC pointers. */
3269 bfd_vma toc_curr;
3270
3271 /* Highest input section id. */
3272 int top_id;
3273
3274 /* Highest output section index. */
3275 int top_index;
3276
3277 /* List of input sections for each output section. */
3278 asection **input_list;
3279
3280 /* Short-cuts to get to dynamic linker sections. */
3281 asection *got;
3282 asection *plt;
3283 asection *relplt;
3284 asection *dynbss;
3285 asection *relbss;
3286 asection *glink;
3287 asection *sfpr;
3288 asection *brlt;
3289 asection *relbrlt;
3290
3291 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3292 struct ppc_link_hash_entry *tls_get_addr;
3293 struct ppc_link_hash_entry *tls_get_addr_fd;
3294
3295 /* Statistics. */
3296 unsigned long stub_count[ppc_stub_plt_call];
3297
3298 /* Number of stubs against global syms. */
3299 unsigned long stub_globals;
3300
3301 /* Set if we should emit symbols for stubs. */
3302 unsigned int emit_stub_syms:1;
3303
3304 /* Support for multiple toc sections. */
3305 unsigned int no_multi_toc:1;
3306 unsigned int multi_toc_needed:1;
3307
3308 /* Set on error. */
3309 unsigned int stub_error:1;
3310
3311 /* Flag set when small branches are detected. Used to
3312 select suitable defaults for the stub group size. */
3313 unsigned int has_14bit_branch:1;
3314
3315 /* Temp used by ppc64_elf_check_directives. */
3316 unsigned int twiddled_syms:1;
3317
3318 /* Incremented every time we size stubs. */
3319 unsigned int stub_iteration;
3320
3321 /* Small local sym to section mapping cache. */
3322 struct sym_sec_cache sym_sec;
3323 };
3324
3325 /* Rename some of the generic section flags to better document how they
3326 are used here. */
3327 #define has_toc_reloc has_gp_reloc
3328 #define makes_toc_func_call need_finalize_relax
3329 #define call_check_in_progress reloc_done
3330
3331 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3332
3333 #define ppc_hash_table(p) \
3334 ((struct ppc_link_hash_table *) ((p)->hash))
3335
3336 #define ppc_stub_hash_lookup(table, string, create, copy) \
3337 ((struct ppc_stub_hash_entry *) \
3338 bfd_hash_lookup ((table), (string), (create), (copy)))
3339
3340 #define ppc_branch_hash_lookup(table, string, create, copy) \
3341 ((struct ppc_branch_hash_entry *) \
3342 bfd_hash_lookup ((table), (string), (create), (copy)))
3343
3344 /* Create an entry in the stub hash table. */
3345
3346 static struct bfd_hash_entry *
3347 stub_hash_newfunc (struct bfd_hash_entry *entry,
3348 struct bfd_hash_table *table,
3349 const char *string)
3350 {
3351 /* Allocate the structure if it has not already been allocated by a
3352 subclass. */
3353 if (entry == NULL)
3354 {
3355 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3356 if (entry == NULL)
3357 return entry;
3358 }
3359
3360 /* Call the allocation method of the superclass. */
3361 entry = bfd_hash_newfunc (entry, table, string);
3362 if (entry != NULL)
3363 {
3364 struct ppc_stub_hash_entry *eh;
3365
3366 /* Initialize the local fields. */
3367 eh = (struct ppc_stub_hash_entry *) entry;
3368 eh->stub_type = ppc_stub_none;
3369 eh->stub_sec = NULL;
3370 eh->stub_offset = 0;
3371 eh->target_value = 0;
3372 eh->target_section = NULL;
3373 eh->h = NULL;
3374 eh->id_sec = NULL;
3375 }
3376
3377 return entry;
3378 }
3379
3380 /* Create an entry in the branch hash table. */
3381
3382 static struct bfd_hash_entry *
3383 branch_hash_newfunc (struct bfd_hash_entry *entry,
3384 struct bfd_hash_table *table,
3385 const char *string)
3386 {
3387 /* Allocate the structure if it has not already been allocated by a
3388 subclass. */
3389 if (entry == NULL)
3390 {
3391 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3392 if (entry == NULL)
3393 return entry;
3394 }
3395
3396 /* Call the allocation method of the superclass. */
3397 entry = bfd_hash_newfunc (entry, table, string);
3398 if (entry != NULL)
3399 {
3400 struct ppc_branch_hash_entry *eh;
3401
3402 /* Initialize the local fields. */
3403 eh = (struct ppc_branch_hash_entry *) entry;
3404 eh->offset = 0;
3405 eh->iter = 0;
3406 }
3407
3408 return entry;
3409 }
3410
3411 /* Create an entry in a ppc64 ELF linker hash table. */
3412
3413 static struct bfd_hash_entry *
3414 link_hash_newfunc (struct bfd_hash_entry *entry,
3415 struct bfd_hash_table *table,
3416 const char *string)
3417 {
3418 /* Allocate the structure if it has not already been allocated by a
3419 subclass. */
3420 if (entry == NULL)
3421 {
3422 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3423 if (entry == NULL)
3424 return entry;
3425 }
3426
3427 /* Call the allocation method of the superclass. */
3428 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3429 if (entry != NULL)
3430 {
3431 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3432
3433 eh->stub_cache = NULL;
3434 eh->dyn_relocs = NULL;
3435 eh->oh = NULL;
3436 eh->is_func = 0;
3437 eh->is_func_descriptor = 0;
3438 eh->adjust_done = 0;
3439 eh->was_undefined = 0;
3440 eh->tls_mask = 0;
3441 }
3442
3443 return entry;
3444 }
3445
3446 /* Create a ppc64 ELF linker hash table. */
3447
3448 static struct bfd_link_hash_table *
3449 ppc64_elf_link_hash_table_create (bfd *abfd)
3450 {
3451 struct ppc_link_hash_table *htab;
3452 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3453
3454 htab = bfd_zmalloc (amt);
3455 if (htab == NULL)
3456 return NULL;
3457
3458 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3459 {
3460 free (htab);
3461 return NULL;
3462 }
3463
3464 /* Init the stub hash table too. */
3465 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3466 return NULL;
3467
3468 /* And the branch hash table. */
3469 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3470 return NULL;
3471
3472 /* Initializing two fields of the union is just cosmetic. We really
3473 only care about glist, but when compiled on a 32-bit host the
3474 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3475 debugger inspection of these fields look nicer. */
3476 htab->elf.init_refcount.refcount = 0;
3477 htab->elf.init_refcount.glist = NULL;
3478 htab->elf.init_offset.offset = 0;
3479 htab->elf.init_offset.glist = NULL;
3480
3481 return &htab->elf.root;
3482 }
3483
3484 /* Free the derived linker hash table. */
3485
3486 static void
3487 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3488 {
3489 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3490
3491 bfd_hash_table_free (&ret->stub_hash_table);
3492 bfd_hash_table_free (&ret->branch_hash_table);
3493 _bfd_generic_link_hash_table_free (hash);
3494 }
3495
3496 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3497
3498 void
3499 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3500 {
3501 struct ppc_link_hash_table *htab;
3502
3503 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3504
3505 /* Always hook our dynamic sections into the first bfd, which is the
3506 linker created stub bfd. This ensures that the GOT header is at
3507 the start of the output TOC section. */
3508 htab = ppc_hash_table (info);
3509 htab->stub_bfd = abfd;
3510 htab->elf.dynobj = abfd;
3511 }
3512
3513 /* Build a name for an entry in the stub hash table. */
3514
3515 static char *
3516 ppc_stub_name (const asection *input_section,
3517 const asection *sym_sec,
3518 const struct ppc_link_hash_entry *h,
3519 const Elf_Internal_Rela *rel)
3520 {
3521 char *stub_name;
3522 bfd_size_type len;
3523
3524 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3525 offsets from a sym as a branch target? In fact, we could
3526 probably assume the addend is always zero. */
3527 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3528
3529 if (h)
3530 {
3531 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3532 stub_name = bfd_malloc (len);
3533 if (stub_name != NULL)
3534 {
3535 sprintf (stub_name, "%08x.%s+%x",
3536 input_section->id & 0xffffffff,
3537 h->elf.root.root.string,
3538 (int) rel->r_addend & 0xffffffff);
3539 }
3540 }
3541 else
3542 {
3543 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3544 stub_name = bfd_malloc (len);
3545 if (stub_name != NULL)
3546 {
3547 sprintf (stub_name, "%08x.%x:%x+%x",
3548 input_section->id & 0xffffffff,
3549 sym_sec->id & 0xffffffff,
3550 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3551 (int) rel->r_addend & 0xffffffff);
3552 }
3553 }
3554 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3555 stub_name[len - 2] = 0;
3556 return stub_name;
3557 }
3558
3559 /* Look up an entry in the stub hash. Stub entries are cached because
3560 creating the stub name takes a bit of time. */
3561
3562 static struct ppc_stub_hash_entry *
3563 ppc_get_stub_entry (const asection *input_section,
3564 const asection *sym_sec,
3565 struct ppc_link_hash_entry *h,
3566 const Elf_Internal_Rela *rel,
3567 struct ppc_link_hash_table *htab)
3568 {
3569 struct ppc_stub_hash_entry *stub_entry;
3570 const asection *id_sec;
3571
3572 /* If this input section is part of a group of sections sharing one
3573 stub section, then use the id of the first section in the group.
3574 Stub names need to include a section id, as there may well be
3575 more than one stub used to reach say, printf, and we need to
3576 distinguish between them. */
3577 id_sec = htab->stub_group[input_section->id].link_sec;
3578
3579 if (h != NULL && h->stub_cache != NULL
3580 && h->stub_cache->h == h
3581 && h->stub_cache->id_sec == id_sec)
3582 {
3583 stub_entry = h->stub_cache;
3584 }
3585 else
3586 {
3587 char *stub_name;
3588
3589 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3590 if (stub_name == NULL)
3591 return NULL;
3592
3593 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3594 stub_name, FALSE, FALSE);
3595 if (h != NULL)
3596 h->stub_cache = stub_entry;
3597
3598 free (stub_name);
3599 }
3600
3601 return stub_entry;
3602 }
3603
3604 /* Add a new stub entry to the stub hash. Not all fields of the new
3605 stub entry are initialised. */
3606
3607 static struct ppc_stub_hash_entry *
3608 ppc_add_stub (const char *stub_name,
3609 asection *section,
3610 struct ppc_link_hash_table *htab)
3611 {
3612 asection *link_sec;
3613 asection *stub_sec;
3614 struct ppc_stub_hash_entry *stub_entry;
3615
3616 link_sec = htab->stub_group[section->id].link_sec;
3617 stub_sec = htab->stub_group[section->id].stub_sec;
3618 if (stub_sec == NULL)
3619 {
3620 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3621 if (stub_sec == NULL)
3622 {
3623 size_t namelen;
3624 bfd_size_type len;
3625 char *s_name;
3626
3627 namelen = strlen (link_sec->name);
3628 len = namelen + sizeof (STUB_SUFFIX);
3629 s_name = bfd_alloc (htab->stub_bfd, len);
3630 if (s_name == NULL)
3631 return NULL;
3632
3633 memcpy (s_name, link_sec->name, namelen);
3634 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3635 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3636 if (stub_sec == NULL)
3637 return NULL;
3638 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3639 }
3640 htab->stub_group[section->id].stub_sec = stub_sec;
3641 }
3642
3643 /* Enter this entry into the linker stub hash table. */
3644 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3645 TRUE, FALSE);
3646 if (stub_entry == NULL)
3647 {
3648 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3649 section->owner, stub_name);
3650 return NULL;
3651 }
3652
3653 stub_entry->stub_sec = stub_sec;
3654 stub_entry->stub_offset = 0;
3655 stub_entry->id_sec = link_sec;
3656 return stub_entry;
3657 }
3658
3659 /* Create sections for linker generated code. */
3660
3661 static bfd_boolean
3662 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3663 {
3664 struct ppc_link_hash_table *htab;
3665 flagword flags;
3666
3667 htab = ppc_hash_table (info);
3668
3669 /* Create .sfpr for code to save and restore fp regs. */
3670 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3671 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3672 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3673 if (htab->sfpr == NULL
3674 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3675 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3676 return FALSE;
3677
3678 /* Create .glink for lazy dynamic linking support. */
3679 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3680 if (htab->glink == NULL
3681 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3682 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3683 return FALSE;
3684
3685 /* Create .branch_lt for plt_branch stubs. */
3686 flags = (SEC_ALLOC | SEC_LOAD
3687 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3688 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3689 if (htab->brlt == NULL
3690 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3691 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3692 return FALSE;
3693
3694 if (info->shared || info->emitrelocations)
3695 {
3696 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3697 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3698 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3699 if (!htab->relbrlt
3700 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3701 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3702 return FALSE;
3703 }
3704 return TRUE;
3705 }
3706
3707 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3708 not already done. */
3709
3710 static bfd_boolean
3711 create_got_section (bfd *abfd, struct bfd_link_info *info)
3712 {
3713 asection *got, *relgot;
3714 flagword flags;
3715 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3716
3717 if (!htab->got)
3718 {
3719 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3720 return FALSE;
3721
3722 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3723 if (!htab->got)
3724 abort ();
3725 }
3726
3727 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3728 | SEC_LINKER_CREATED);
3729
3730 got = bfd_make_section (abfd, ".got");
3731 if (!got
3732 || !bfd_set_section_flags (abfd, got, flags)
3733 || !bfd_set_section_alignment (abfd, got, 3))
3734 return FALSE;
3735
3736 relgot = bfd_make_section (abfd, ".rela.got");
3737 if (!relgot
3738 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3739 || ! bfd_set_section_alignment (abfd, relgot, 3))
3740 return FALSE;
3741
3742 ppc64_elf_tdata (abfd)->got = got;
3743 ppc64_elf_tdata (abfd)->relgot = relgot;
3744 return TRUE;
3745 }
3746
3747 /* Create the dynamic sections, and set up shortcuts. */
3748
3749 static bfd_boolean
3750 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3751 {
3752 struct ppc_link_hash_table *htab;
3753
3754 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3755 return FALSE;
3756
3757 htab = ppc_hash_table (info);
3758 if (!htab->got)
3759 htab->got = bfd_get_section_by_name (dynobj, ".got");
3760 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3761 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3762 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3763 if (!info->shared)
3764 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3765
3766 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3767 || (!info->shared && !htab->relbss))
3768 abort ();
3769
3770 return TRUE;
3771 }
3772
3773 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3774
3775 static void
3776 ppc64_elf_copy_indirect_symbol
3777 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3778 struct elf_link_hash_entry *dir,
3779 struct elf_link_hash_entry *ind)
3780 {
3781 struct ppc_link_hash_entry *edir, *eind;
3782
3783 edir = (struct ppc_link_hash_entry *) dir;
3784 eind = (struct ppc_link_hash_entry *) ind;
3785
3786 /* Copy over any dynamic relocs we may have on the indirect sym. */
3787 if (eind->dyn_relocs != NULL)
3788 {
3789 if (edir->dyn_relocs != NULL)
3790 {
3791 struct ppc_dyn_relocs **pp;
3792 struct ppc_dyn_relocs *p;
3793
3794 if (eind->elf.root.type == bfd_link_hash_indirect)
3795 abort ();
3796
3797 /* Add reloc counts against the weak sym to the strong sym
3798 list. Merge any entries against the same section. */
3799 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3800 {
3801 struct ppc_dyn_relocs *q;
3802
3803 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3804 if (q->sec == p->sec)
3805 {
3806 q->pc_count += p->pc_count;
3807 q->count += p->count;
3808 *pp = p->next;
3809 break;
3810 }
3811 if (q == NULL)
3812 pp = &p->next;
3813 }
3814 *pp = edir->dyn_relocs;
3815 }
3816
3817 edir->dyn_relocs = eind->dyn_relocs;
3818 eind->dyn_relocs = NULL;
3819 }
3820
3821 edir->is_func |= eind->is_func;
3822 edir->is_func_descriptor |= eind->is_func_descriptor;
3823 edir->tls_mask |= eind->tls_mask;
3824
3825 /* If called to transfer flags for a weakdef during processing
3826 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3827 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3828 if (!(ELIMINATE_COPY_RELOCS
3829 && eind->elf.root.type != bfd_link_hash_indirect
3830 && edir->elf.dynamic_adjusted))
3831 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3832
3833 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3834 edir->elf.ref_regular |= eind->elf.ref_regular;
3835 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3836 edir->elf.needs_plt |= eind->elf.needs_plt;
3837
3838 /* If we were called to copy over info for a weak sym, that's all. */
3839 if (eind->elf.root.type != bfd_link_hash_indirect)
3840 return;
3841
3842 /* Copy over got entries that we may have already seen to the
3843 symbol which just became indirect. */
3844 if (eind->elf.got.glist != NULL)
3845 {
3846 if (edir->elf.got.glist != NULL)
3847 {
3848 struct got_entry **entp;
3849 struct got_entry *ent;
3850
3851 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3852 {
3853 struct got_entry *dent;
3854
3855 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3856 if (dent->addend == ent->addend
3857 && dent->owner == ent->owner
3858 && dent->tls_type == ent->tls_type)
3859 {
3860 dent->got.refcount += ent->got.refcount;
3861 *entp = ent->next;
3862 break;
3863 }
3864 if (dent == NULL)
3865 entp = &ent->next;
3866 }
3867 *entp = edir->elf.got.glist;
3868 }
3869
3870 edir->elf.got.glist = eind->elf.got.glist;
3871 eind->elf.got.glist = NULL;
3872 }
3873
3874 /* And plt entries. */
3875 if (eind->elf.plt.plist != NULL)
3876 {
3877 if (edir->elf.plt.plist != NULL)
3878 {
3879 struct plt_entry **entp;
3880 struct plt_entry *ent;
3881
3882 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3883 {
3884 struct plt_entry *dent;
3885
3886 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3887 if (dent->addend == ent->addend)
3888 {
3889 dent->plt.refcount += ent->plt.refcount;
3890 *entp = ent->next;
3891 break;
3892 }
3893 if (dent == NULL)
3894 entp = &ent->next;
3895 }
3896 *entp = edir->elf.plt.plist;
3897 }
3898
3899 edir->elf.plt.plist = eind->elf.plt.plist;
3900 eind->elf.plt.plist = NULL;
3901 }
3902
3903 if (edir->elf.dynindx == -1)
3904 {
3905 edir->elf.dynindx = eind->elf.dynindx;
3906 edir->elf.dynstr_index = eind->elf.dynstr_index;
3907 eind->elf.dynindx = -1;
3908 eind->elf.dynstr_index = 0;
3909 }
3910 else
3911 BFD_ASSERT (eind->elf.dynindx == -1);
3912 }
3913
3914 /* Find the function descriptor hash entry from the given function code
3915 hash entry FH. Link the entries via their OH fields. */
3916
3917 static struct ppc_link_hash_entry *
3918 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3919 {
3920 struct ppc_link_hash_entry *fdh = fh->oh;
3921
3922 if (fdh == NULL)
3923 {
3924 const char *fd_name = fh->elf.root.root.string + 1;
3925
3926 fdh = (struct ppc_link_hash_entry *)
3927 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3928 if (fdh != NULL)
3929 {
3930 fdh->is_func_descriptor = 1;
3931 fdh->oh = fh;
3932 fh->is_func = 1;
3933 fh->oh = fdh;
3934 }
3935 }
3936
3937 return fdh;
3938 }
3939
3940 /* Hacks to support old ABI code.
3941 When making function calls, old ABI code references function entry
3942 points (dot symbols), while new ABI code references the function
3943 descriptor symbol. We need to make any combination of reference and
3944 definition work together, without breaking archive linking.
3945
3946 For a defined function "foo" and an undefined call to "bar":
3947 An old object defines "foo" and ".foo", references ".bar" (possibly
3948 "bar" too).
3949 A new object defines "foo" and references "bar".
3950
3951 A new object thus has no problem with its undefined symbols being
3952 satisfied by definitions in an old object. On the other hand, the
3953 old object won't have ".bar" satisfied by a new object. */
3954
3955 /* Fix function descriptor symbols defined in .opd sections to be
3956 function type. */
3957
3958 static bfd_boolean
3959 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3960 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3961 Elf_Internal_Sym *isym,
3962 const char **name ATTRIBUTE_UNUSED,
3963 flagword *flags ATTRIBUTE_UNUSED,
3964 asection **sec,
3965 bfd_vma *value ATTRIBUTE_UNUSED)
3966 {
3967 if (*sec != NULL
3968 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3969 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3970 return TRUE;
3971 }
3972
3973 /* This function makes an old ABI object reference to ".bar" cause the
3974 inclusion of a new ABI object archive that defines "bar". */
3975
3976 static struct elf_link_hash_entry *
3977 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3978 struct bfd_link_info *info,
3979 const char *name)
3980 {
3981 struct elf_link_hash_entry *h;
3982 char *dot_name;
3983 size_t len;
3984
3985 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3986 if (h != NULL)
3987 return h;
3988
3989 if (name[0] == '.')
3990 return h;
3991
3992 len = strlen (name);
3993 dot_name = bfd_alloc (abfd, len + 2);
3994 if (dot_name == NULL)
3995 return (struct elf_link_hash_entry *) 0 - 1;
3996 dot_name[0] = '.';
3997 memcpy (dot_name + 1, name, len + 1);
3998 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3999 bfd_release (abfd, dot_name);
4000 return h;
4001 }
4002
4003 /* This function satisfies all old ABI object references to ".bar" if a
4004 new ABI object defines "bar". Well, at least, undefined dot symbols
4005 are made weak. This stops later archive searches from including an
4006 object if we already have a function descriptor definition. It also
4007 prevents the linker complaining about undefined symbols.
4008 We also check and correct mismatched symbol visibility here. The
4009 most restrictive visibility of the function descriptor and the
4010 function entry symbol is used. */
4011
4012 static bfd_boolean
4013 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4014 {
4015 struct bfd_link_info *info;
4016 struct ppc_link_hash_table *htab;
4017 struct ppc_link_hash_entry *eh;
4018 struct ppc_link_hash_entry *fdh;
4019
4020 if (h->root.type == bfd_link_hash_indirect)
4021 return TRUE;
4022
4023 if (h->root.type == bfd_link_hash_warning)
4024 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4025
4026 if (h->root.root.string[0] != '.')
4027 return TRUE;
4028
4029 info = inf;
4030 htab = ppc_hash_table (info);
4031 eh = (struct ppc_link_hash_entry *) h;
4032 fdh = get_fdh (eh, htab);
4033 if (fdh != NULL)
4034 {
4035 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4036 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4037 if (entry_vis < descr_vis)
4038 fdh->elf.other += entry_vis - descr_vis;
4039 else if (entry_vis > descr_vis)
4040 eh->elf.other += descr_vis - entry_vis;
4041
4042 if (eh->elf.root.type == bfd_link_hash_undefined)
4043 {
4044 eh->elf.root.type = bfd_link_hash_undefweak;
4045 eh->was_undefined = 1;
4046 htab->twiddled_syms = 1;
4047 }
4048 }
4049
4050 return TRUE;
4051 }
4052
4053 static bfd_boolean
4054 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4055 struct bfd_link_info *info)
4056 {
4057 struct ppc_link_hash_table *htab;
4058
4059 htab = ppc_hash_table (info);
4060 if (!is_ppc64_elf_target (htab->elf.root.creator))
4061 return TRUE;
4062
4063 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, info);
4064
4065 /* We need to fix the undefs list for any syms we have twiddled to
4066 undef_weak. */
4067 if (htab->twiddled_syms)
4068 {
4069 struct bfd_link_hash_entry **pun;
4070
4071 pun = &htab->elf.root.undefs;
4072 while (*pun != NULL)
4073 {
4074 struct bfd_link_hash_entry *h = *pun;
4075
4076 if (h->type != bfd_link_hash_undefined
4077 && h->type != bfd_link_hash_common)
4078 {
4079 *pun = h->u.undef.next;
4080 h->u.undef.next = NULL;
4081 if (h == htab->elf.root.undefs_tail)
4082 {
4083 if (pun == &htab->elf.root.undefs)
4084 htab->elf.root.undefs_tail = NULL;
4085 else
4086 /* pun points at an u.undef.next field. Go back to
4087 the start of the link_hash_entry. */
4088 htab->elf.root.undefs_tail = (struct bfd_link_hash_entry *)
4089 ((char *) pun - ((char *) &h->u.undef.next - (char *) h));
4090 break;
4091 }
4092 }
4093 else
4094 pun = &h->u.undef.next;
4095 }
4096
4097 htab->twiddled_syms = 0;
4098 }
4099 return TRUE;
4100 }
4101
4102 static bfd_boolean
4103 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4104 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4105 {
4106 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4107 char *local_got_tls_masks;
4108
4109 if (local_got_ents == NULL)
4110 {
4111 bfd_size_type size = symtab_hdr->sh_info;
4112
4113 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4114 local_got_ents = bfd_zalloc (abfd, size);
4115 if (local_got_ents == NULL)
4116 return FALSE;
4117 elf_local_got_ents (abfd) = local_got_ents;
4118 }
4119
4120 if ((tls_type & TLS_EXPLICIT) == 0)
4121 {
4122 struct got_entry *ent;
4123
4124 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4125 if (ent->addend == r_addend
4126 && ent->owner == abfd
4127 && ent->tls_type == tls_type)
4128 break;
4129 if (ent == NULL)
4130 {
4131 bfd_size_type amt = sizeof (*ent);
4132 ent = bfd_alloc (abfd, amt);
4133 if (ent == NULL)
4134 return FALSE;
4135 ent->next = local_got_ents[r_symndx];
4136 ent->addend = r_addend;
4137 ent->owner = abfd;
4138 ent->tls_type = tls_type;
4139 ent->got.refcount = 0;
4140 local_got_ents[r_symndx] = ent;
4141 }
4142 ent->got.refcount += 1;
4143 }
4144
4145 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4146 local_got_tls_masks[r_symndx] |= tls_type;
4147 return TRUE;
4148 }
4149
4150 static bfd_boolean
4151 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4152 {
4153 struct plt_entry *ent;
4154
4155 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4156 if (ent->addend == addend)
4157 break;
4158 if (ent == NULL)
4159 {
4160 bfd_size_type amt = sizeof (*ent);
4161 ent = bfd_alloc (abfd, amt);
4162 if (ent == NULL)
4163 return FALSE;
4164 ent->next = eh->elf.plt.plist;
4165 ent->addend = addend;
4166 ent->plt.refcount = 0;
4167 eh->elf.plt.plist = ent;
4168 }
4169 ent->plt.refcount += 1;
4170 eh->elf.needs_plt = 1;
4171 eh->is_func = 1;
4172 return TRUE;
4173 }
4174
4175 /* Look through the relocs for a section during the first phase, and
4176 calculate needed space in the global offset table, procedure
4177 linkage table, and dynamic reloc sections. */
4178
4179 static bfd_boolean
4180 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4181 asection *sec, const Elf_Internal_Rela *relocs)
4182 {
4183 struct ppc_link_hash_table *htab;
4184 Elf_Internal_Shdr *symtab_hdr;
4185 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4186 const Elf_Internal_Rela *rel;
4187 const Elf_Internal_Rela *rel_end;
4188 asection *sreloc;
4189 asection **opd_sym_map;
4190
4191 if (info->relocatable)
4192 return TRUE;
4193
4194 /* Don't do anything special with non-loaded, non-alloced sections.
4195 In particular, any relocs in such sections should not affect GOT
4196 and PLT reference counting (ie. we don't allow them to create GOT
4197 or PLT entries), there's no possibility or desire to optimize TLS
4198 relocs, and there's not much point in propagating relocs to shared
4199 libs that the dynamic linker won't relocate. */
4200 if ((sec->flags & SEC_ALLOC) == 0)
4201 return TRUE;
4202
4203 htab = ppc_hash_table (info);
4204 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4205
4206 sym_hashes = elf_sym_hashes (abfd);
4207 sym_hashes_end = (sym_hashes
4208 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4209 - symtab_hdr->sh_info);
4210
4211 sreloc = NULL;
4212 opd_sym_map = NULL;
4213 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4214 {
4215 /* Garbage collection needs some extra help with .opd sections.
4216 We don't want to necessarily keep everything referenced by
4217 relocs in .opd, as that would keep all functions. Instead,
4218 if we reference an .opd symbol (a function descriptor), we
4219 want to keep the function code symbol's section. This is
4220 easy for global symbols, but for local syms we need to keep
4221 information about the associated function section. Later, if
4222 edit_opd deletes entries, we'll use this array to adjust
4223 local syms in .opd. */
4224 union opd_info {
4225 asection *func_section;
4226 long entry_adjust;
4227 };
4228 bfd_size_type amt;
4229
4230 amt = sec->size * sizeof (union opd_info) / 8;
4231 opd_sym_map = bfd_zalloc (abfd, amt);
4232 if (opd_sym_map == NULL)
4233 return FALSE;
4234 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4235 }
4236
4237 if (htab->sfpr == NULL
4238 && !create_linkage_sections (htab->elf.dynobj, info))
4239 return FALSE;
4240
4241 rel_end = relocs + sec->reloc_count;
4242 for (rel = relocs; rel < rel_end; rel++)
4243 {
4244 unsigned long r_symndx;
4245 struct elf_link_hash_entry *h;
4246 enum elf_ppc64_reloc_type r_type;
4247 int tls_type = 0;
4248
4249 r_symndx = ELF64_R_SYM (rel->r_info);
4250 if (r_symndx < symtab_hdr->sh_info)
4251 h = NULL;
4252 else
4253 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4254
4255 r_type = ELF64_R_TYPE (rel->r_info);
4256 switch (r_type)
4257 {
4258 case R_PPC64_GOT_TLSLD16:
4259 case R_PPC64_GOT_TLSLD16_LO:
4260 case R_PPC64_GOT_TLSLD16_HI:
4261 case R_PPC64_GOT_TLSLD16_HA:
4262 ppc64_tlsld_got (abfd)->refcount += 1;
4263 tls_type = TLS_TLS | TLS_LD;
4264 goto dogottls;
4265
4266 case R_PPC64_GOT_TLSGD16:
4267 case R_PPC64_GOT_TLSGD16_LO:
4268 case R_PPC64_GOT_TLSGD16_HI:
4269 case R_PPC64_GOT_TLSGD16_HA:
4270 tls_type = TLS_TLS | TLS_GD;
4271 goto dogottls;
4272
4273 case R_PPC64_GOT_TPREL16_DS:
4274 case R_PPC64_GOT_TPREL16_LO_DS:
4275 case R_PPC64_GOT_TPREL16_HI:
4276 case R_PPC64_GOT_TPREL16_HA:
4277 if (info->shared)
4278 info->flags |= DF_STATIC_TLS;
4279 tls_type = TLS_TLS | TLS_TPREL;
4280 goto dogottls;
4281
4282 case R_PPC64_GOT_DTPREL16_DS:
4283 case R_PPC64_GOT_DTPREL16_LO_DS:
4284 case R_PPC64_GOT_DTPREL16_HI:
4285 case R_PPC64_GOT_DTPREL16_HA:
4286 tls_type = TLS_TLS | TLS_DTPREL;
4287 dogottls:
4288 sec->has_tls_reloc = 1;
4289 /* Fall thru */
4290
4291 case R_PPC64_GOT16:
4292 case R_PPC64_GOT16_DS:
4293 case R_PPC64_GOT16_HA:
4294 case R_PPC64_GOT16_HI:
4295 case R_PPC64_GOT16_LO:
4296 case R_PPC64_GOT16_LO_DS:
4297 /* This symbol requires a global offset table entry. */
4298 sec->has_toc_reloc = 1;
4299 if (ppc64_elf_tdata (abfd)->got == NULL
4300 && !create_got_section (abfd, info))
4301 return FALSE;
4302
4303 if (h != NULL)
4304 {
4305 struct ppc_link_hash_entry *eh;
4306 struct got_entry *ent;
4307
4308 eh = (struct ppc_link_hash_entry *) h;
4309 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4310 if (ent->addend == rel->r_addend
4311 && ent->owner == abfd
4312 && ent->tls_type == tls_type)
4313 break;
4314 if (ent == NULL)
4315 {
4316 bfd_size_type amt = sizeof (*ent);
4317 ent = bfd_alloc (abfd, amt);
4318 if (ent == NULL)
4319 return FALSE;
4320 ent->next = eh->elf.got.glist;
4321 ent->addend = rel->r_addend;
4322 ent->owner = abfd;
4323 ent->tls_type = tls_type;
4324 ent->got.refcount = 0;
4325 eh->elf.got.glist = ent;
4326 }
4327 ent->got.refcount += 1;
4328 eh->tls_mask |= tls_type;
4329 }
4330 else
4331 /* This is a global offset table entry for a local symbol. */
4332 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4333 rel->r_addend, tls_type))
4334 return FALSE;
4335 break;
4336
4337 case R_PPC64_PLT16_HA:
4338 case R_PPC64_PLT16_HI:
4339 case R_PPC64_PLT16_LO:
4340 case R_PPC64_PLT32:
4341 case R_PPC64_PLT64:
4342 /* This symbol requires a procedure linkage table entry. We
4343 actually build the entry in adjust_dynamic_symbol,
4344 because this might be a case of linking PIC code without
4345 linking in any dynamic objects, in which case we don't
4346 need to generate a procedure linkage table after all. */
4347 if (h == NULL)
4348 {
4349 /* It does not make sense to have a procedure linkage
4350 table entry for a local symbol. */
4351 bfd_set_error (bfd_error_bad_value);
4352 return FALSE;
4353 }
4354 else
4355 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4356 rel->r_addend))
4357 return FALSE;
4358 break;
4359
4360 /* The following relocations don't need to propagate the
4361 relocation if linking a shared object since they are
4362 section relative. */
4363 case R_PPC64_SECTOFF:
4364 case R_PPC64_SECTOFF_LO:
4365 case R_PPC64_SECTOFF_HI:
4366 case R_PPC64_SECTOFF_HA:
4367 case R_PPC64_SECTOFF_DS:
4368 case R_PPC64_SECTOFF_LO_DS:
4369 case R_PPC64_DTPREL16:
4370 case R_PPC64_DTPREL16_LO:
4371 case R_PPC64_DTPREL16_HI:
4372 case R_PPC64_DTPREL16_HA:
4373 case R_PPC64_DTPREL16_DS:
4374 case R_PPC64_DTPREL16_LO_DS:
4375 case R_PPC64_DTPREL16_HIGHER:
4376 case R_PPC64_DTPREL16_HIGHERA:
4377 case R_PPC64_DTPREL16_HIGHEST:
4378 case R_PPC64_DTPREL16_HIGHESTA:
4379 break;
4380
4381 /* Nor do these. */
4382 case R_PPC64_TOC16:
4383 case R_PPC64_TOC16_LO:
4384 case R_PPC64_TOC16_HI:
4385 case R_PPC64_TOC16_HA:
4386 case R_PPC64_TOC16_DS:
4387 case R_PPC64_TOC16_LO_DS:
4388 sec->has_toc_reloc = 1;
4389 break;
4390
4391 /* This relocation describes the C++ object vtable hierarchy.
4392 Reconstruct it for later use during GC. */
4393 case R_PPC64_GNU_VTINHERIT:
4394 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4395 return FALSE;
4396 break;
4397
4398 /* This relocation describes which C++ vtable entries are actually
4399 used. Record for later use during GC. */
4400 case R_PPC64_GNU_VTENTRY:
4401 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4402 return FALSE;
4403 break;
4404
4405 case R_PPC64_REL14:
4406 case R_PPC64_REL14_BRTAKEN:
4407 case R_PPC64_REL14_BRNTAKEN:
4408 htab->has_14bit_branch = 1;
4409 /* Fall through. */
4410
4411 case R_PPC64_REL24:
4412 if (h != NULL)
4413 {
4414 /* We may need a .plt entry if the function this reloc
4415 refers to is in a shared lib. */
4416 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4417 rel->r_addend))
4418 return FALSE;
4419 if (h == &htab->tls_get_addr->elf
4420 || h == &htab->tls_get_addr_fd->elf)
4421 sec->has_tls_reloc = 1;
4422 else if (htab->tls_get_addr == NULL
4423 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4424 && (h->root.root.string[15] == 0
4425 || h->root.root.string[15] == '@'))
4426 {
4427 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4428 sec->has_tls_reloc = 1;
4429 }
4430 else if (htab->tls_get_addr_fd == NULL
4431 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4432 && (h->root.root.string[14] == 0
4433 || h->root.root.string[14] == '@'))
4434 {
4435 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4436 sec->has_tls_reloc = 1;
4437 }
4438 }
4439 break;
4440
4441 case R_PPC64_TPREL64:
4442 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4443 if (info->shared)
4444 info->flags |= DF_STATIC_TLS;
4445 goto dotlstoc;
4446
4447 case R_PPC64_DTPMOD64:
4448 if (rel + 1 < rel_end
4449 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4450 && rel[1].r_offset == rel->r_offset + 8)
4451 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4452 else
4453 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4454 goto dotlstoc;
4455
4456 case R_PPC64_DTPREL64:
4457 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4458 if (rel != relocs
4459 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4460 && rel[-1].r_offset == rel->r_offset - 8)
4461 /* This is the second reloc of a dtpmod, dtprel pair.
4462 Don't mark with TLS_DTPREL. */
4463 goto dodyn;
4464
4465 dotlstoc:
4466 sec->has_tls_reloc = 1;
4467 if (h != NULL)
4468 {
4469 struct ppc_link_hash_entry *eh;
4470 eh = (struct ppc_link_hash_entry *) h;
4471 eh->tls_mask |= tls_type;
4472 }
4473 else
4474 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4475 rel->r_addend, tls_type))
4476 return FALSE;
4477
4478 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4479 {
4480 /* One extra to simplify get_tls_mask. */
4481 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4482 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4483 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4484 return FALSE;
4485 }
4486 BFD_ASSERT (rel->r_offset % 8 == 0);
4487 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4488
4489 /* Mark the second slot of a GD or LD entry.
4490 -1 to indicate GD and -2 to indicate LD. */
4491 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4492 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4493 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4494 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4495 goto dodyn;
4496
4497 case R_PPC64_TPREL16:
4498 case R_PPC64_TPREL16_LO:
4499 case R_PPC64_TPREL16_HI:
4500 case R_PPC64_TPREL16_HA:
4501 case R_PPC64_TPREL16_DS:
4502 case R_PPC64_TPREL16_LO_DS:
4503 case R_PPC64_TPREL16_HIGHER:
4504 case R_PPC64_TPREL16_HIGHERA:
4505 case R_PPC64_TPREL16_HIGHEST:
4506 case R_PPC64_TPREL16_HIGHESTA:
4507 if (info->shared)
4508 {
4509 info->flags |= DF_STATIC_TLS;
4510 goto dodyn;
4511 }
4512 break;
4513
4514 case R_PPC64_ADDR64:
4515 if (opd_sym_map != NULL
4516 && rel + 1 < rel_end
4517 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4518 {
4519 if (h != NULL)
4520 {
4521 if (h->root.root.string[0] == '.'
4522 && h->root.root.string[1] != 0
4523 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4524 ;
4525 else
4526 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4527 }
4528 else
4529 {
4530 asection *s;
4531
4532 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4533 r_symndx);
4534 if (s == NULL)
4535 return FALSE;
4536 else if (s != sec)
4537 opd_sym_map[rel->r_offset / 8] = s;
4538 }
4539 }
4540 /* Fall through. */
4541
4542 case R_PPC64_REL30:
4543 case R_PPC64_REL32:
4544 case R_PPC64_REL64:
4545 case R_PPC64_ADDR14:
4546 case R_PPC64_ADDR14_BRNTAKEN:
4547 case R_PPC64_ADDR14_BRTAKEN:
4548 case R_PPC64_ADDR16:
4549 case R_PPC64_ADDR16_DS:
4550 case R_PPC64_ADDR16_HA:
4551 case R_PPC64_ADDR16_HI:
4552 case R_PPC64_ADDR16_HIGHER:
4553 case R_PPC64_ADDR16_HIGHERA:
4554 case R_PPC64_ADDR16_HIGHEST:
4555 case R_PPC64_ADDR16_HIGHESTA:
4556 case R_PPC64_ADDR16_LO:
4557 case R_PPC64_ADDR16_LO_DS:
4558 case R_PPC64_ADDR24:
4559 case R_PPC64_ADDR32:
4560 case R_PPC64_UADDR16:
4561 case R_PPC64_UADDR32:
4562 case R_PPC64_UADDR64:
4563 case R_PPC64_TOC:
4564 if (h != NULL && !info->shared)
4565 /* We may need a copy reloc. */
4566 h->non_got_ref = 1;
4567
4568 /* Don't propagate .opd relocs. */
4569 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4570 break;
4571
4572 /* If we are creating a shared library, and this is a reloc
4573 against a global symbol, or a non PC relative reloc
4574 against a local symbol, then we need to copy the reloc
4575 into the shared library. However, if we are linking with
4576 -Bsymbolic, we do not need to copy a reloc against a
4577 global symbol which is defined in an object we are
4578 including in the link (i.e., DEF_REGULAR is set). At
4579 this point we have not seen all the input files, so it is
4580 possible that DEF_REGULAR is not set now but will be set
4581 later (it is never cleared). In case of a weak definition,
4582 DEF_REGULAR may be cleared later by a strong definition in
4583 a shared library. We account for that possibility below by
4584 storing information in the dyn_relocs field of the hash
4585 table entry. A similar situation occurs when creating
4586 shared libraries and symbol visibility changes render the
4587 symbol local.
4588
4589 If on the other hand, we are creating an executable, we
4590 may need to keep relocations for symbols satisfied by a
4591 dynamic library if we manage to avoid copy relocs for the
4592 symbol. */
4593 dodyn:
4594 if ((info->shared
4595 && (MUST_BE_DYN_RELOC (r_type)
4596 || (h != NULL
4597 && (! info->symbolic
4598 || h->root.type == bfd_link_hash_defweak
4599 || !h->def_regular))))
4600 || (ELIMINATE_COPY_RELOCS
4601 && !info->shared
4602 && h != NULL
4603 && (h->root.type == bfd_link_hash_defweak
4604 || !h->def_regular)))
4605 {
4606 struct ppc_dyn_relocs *p;
4607 struct ppc_dyn_relocs **head;
4608
4609 /* We must copy these reloc types into the output file.
4610 Create a reloc section in dynobj and make room for
4611 this reloc. */
4612 if (sreloc == NULL)
4613 {
4614 const char *name;
4615 bfd *dynobj;
4616
4617 name = (bfd_elf_string_from_elf_section
4618 (abfd,
4619 elf_elfheader (abfd)->e_shstrndx,
4620 elf_section_data (sec)->rel_hdr.sh_name));
4621 if (name == NULL)
4622 return FALSE;
4623
4624 if (strncmp (name, ".rela", 5) != 0
4625 || strcmp (bfd_get_section_name (abfd, sec),
4626 name + 5) != 0)
4627 {
4628 (*_bfd_error_handler)
4629 (_("%B: bad relocation section name `%s\'"),
4630 abfd, name);
4631 bfd_set_error (bfd_error_bad_value);
4632 }
4633
4634 dynobj = htab->elf.dynobj;
4635 sreloc = bfd_get_section_by_name (dynobj, name);
4636 if (sreloc == NULL)
4637 {
4638 flagword flags;
4639
4640 sreloc = bfd_make_section (dynobj, name);
4641 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4642 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4643 if ((sec->flags & SEC_ALLOC) != 0)
4644 flags |= SEC_ALLOC | SEC_LOAD;
4645 if (sreloc == NULL
4646 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4647 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4648 return FALSE;
4649 }
4650 elf_section_data (sec)->sreloc = sreloc;
4651 }
4652
4653 /* If this is a global symbol, we count the number of
4654 relocations we need for this symbol. */
4655 if (h != NULL)
4656 {
4657 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4658 }
4659 else
4660 {
4661 /* Track dynamic relocs needed for local syms too.
4662 We really need local syms available to do this
4663 easily. Oh well. */
4664
4665 asection *s;
4666 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4667 sec, r_symndx);
4668 if (s == NULL)
4669 return FALSE;
4670
4671 head = ((struct ppc_dyn_relocs **)
4672 &elf_section_data (s)->local_dynrel);
4673 }
4674
4675 p = *head;
4676 if (p == NULL || p->sec != sec)
4677 {
4678 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4679 if (p == NULL)
4680 return FALSE;
4681 p->next = *head;
4682 *head = p;
4683 p->sec = sec;
4684 p->count = 0;
4685 p->pc_count = 0;
4686 }
4687
4688 p->count += 1;
4689 if (!MUST_BE_DYN_RELOC (r_type))
4690 p->pc_count += 1;
4691 }
4692 break;
4693
4694 default:
4695 break;
4696 }
4697 }
4698
4699 return TRUE;
4700 }
4701
4702 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4703 of the code entry point, and its section. */
4704
4705 static bfd_vma
4706 opd_entry_value (asection *opd_sec,
4707 bfd_vma offset,
4708 asection **code_sec,
4709 bfd_vma *code_off)
4710 {
4711 bfd *opd_bfd = opd_sec->owner;
4712 Elf_Internal_Rela *relocs;
4713 Elf_Internal_Rela *lo, *hi, *look;
4714 bfd_vma val;
4715
4716 /* No relocs implies we are linking a --just-symbols object. */
4717 if (opd_sec->reloc_count == 0)
4718 {
4719 bfd_vma val;
4720
4721 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4722 return (bfd_vma) -1;
4723
4724 if (code_sec != NULL)
4725 {
4726 asection *sec, *likely = NULL;
4727 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4728 if (sec->vma <= val
4729 && (sec->flags & SEC_LOAD) != 0
4730 && (sec->flags & SEC_ALLOC) != 0)
4731 likely = sec;
4732 if (likely != NULL)
4733 {
4734 *code_sec = likely;
4735 if (code_off != NULL)
4736 *code_off = val - likely->vma;
4737 }
4738 }
4739 return val;
4740 }
4741
4742 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4743 if (relocs == NULL)
4744 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4745
4746 /* Go find the opd reloc at the sym address. */
4747 lo = relocs;
4748 BFD_ASSERT (lo != NULL);
4749 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4750 val = (bfd_vma) -1;
4751 while (lo < hi)
4752 {
4753 look = lo + (hi - lo) / 2;
4754 if (look->r_offset < offset)
4755 lo = look + 1;
4756 else if (look->r_offset > offset)
4757 hi = look;
4758 else
4759 {
4760 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4761 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4762 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4763 {
4764 unsigned long symndx = ELF64_R_SYM (look->r_info);
4765 asection *sec;
4766
4767 if (symndx < symtab_hdr->sh_info)
4768 {
4769 Elf_Internal_Sym *sym;
4770
4771 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4772 if (sym == NULL)
4773 {
4774 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4775 symtab_hdr->sh_info,
4776 0, NULL, NULL, NULL);
4777 if (sym == NULL)
4778 break;
4779 symtab_hdr->contents = (bfd_byte *) sym;
4780 }
4781
4782 sym += symndx;
4783 val = sym->st_value;
4784 sec = NULL;
4785 if ((sym->st_shndx != SHN_UNDEF
4786 && sym->st_shndx < SHN_LORESERVE)
4787 || sym->st_shndx > SHN_HIRESERVE)
4788 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4789 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4790 }
4791 else
4792 {
4793 struct elf_link_hash_entry **sym_hashes;
4794 struct elf_link_hash_entry *rh;
4795
4796 sym_hashes = elf_sym_hashes (opd_bfd);
4797 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4798 while (rh->root.type == bfd_link_hash_indirect
4799 || rh->root.type == bfd_link_hash_warning)
4800 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4801 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4802 || rh->root.type == bfd_link_hash_defweak);
4803 val = rh->root.u.def.value;
4804 sec = rh->root.u.def.section;
4805 }
4806 val += look->r_addend;
4807 if (code_off != NULL)
4808 *code_off = val;
4809 if (code_sec != NULL)
4810 *code_sec = sec;
4811 if (sec != NULL && sec->output_section != NULL)
4812 val += sec->output_section->vma + sec->output_offset;
4813 }
4814 break;
4815 }
4816 }
4817
4818 return val;
4819 }
4820
4821 /* Return the section that should be marked against GC for a given
4822 relocation. */
4823
4824 static asection *
4825 ppc64_elf_gc_mark_hook (asection *sec,
4826 struct bfd_link_info *info,
4827 Elf_Internal_Rela *rel,
4828 struct elf_link_hash_entry *h,
4829 Elf_Internal_Sym *sym)
4830 {
4831 asection *rsec;
4832
4833 /* First mark all our entry sym sections. */
4834 if (info->gc_sym_list != NULL)
4835 {
4836 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4837 struct bfd_sym_chain *sym = info->gc_sym_list;
4838
4839 info->gc_sym_list = NULL;
4840 do
4841 {
4842 struct ppc_link_hash_entry *eh;
4843
4844 eh = (struct ppc_link_hash_entry *)
4845 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4846 if (eh == NULL)
4847 continue;
4848 if (eh->elf.root.type != bfd_link_hash_defined
4849 && eh->elf.root.type != bfd_link_hash_defweak)
4850 continue;
4851
4852 if (eh->is_func_descriptor)
4853 rsec = eh->oh->elf.root.u.def.section;
4854 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4855 && opd_entry_value (eh->elf.root.u.def.section,
4856 eh->elf.root.u.def.value,
4857 &rsec, NULL) != (bfd_vma) -1)
4858 ;
4859 else
4860 continue;
4861
4862 if (!rsec->gc_mark)
4863 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4864
4865 rsec = eh->elf.root.u.def.section;
4866 if (!rsec->gc_mark)
4867 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4868
4869 sym = sym->next;
4870 }
4871 while (sym != NULL);
4872 }
4873
4874 /* Syms return NULL if we're marking .opd, so we avoid marking all
4875 function sections, as all functions are referenced in .opd. */
4876 rsec = NULL;
4877 if (get_opd_info (sec) != NULL)
4878 return rsec;
4879
4880 if (h != NULL)
4881 {
4882 enum elf_ppc64_reloc_type r_type;
4883 struct ppc_link_hash_entry *eh;
4884
4885 r_type = ELF64_R_TYPE (rel->r_info);
4886 switch (r_type)
4887 {
4888 case R_PPC64_GNU_VTINHERIT:
4889 case R_PPC64_GNU_VTENTRY:
4890 break;
4891
4892 default:
4893 switch (h->root.type)
4894 {
4895 case bfd_link_hash_defined:
4896 case bfd_link_hash_defweak:
4897 eh = (struct ppc_link_hash_entry *) h;
4898 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4899 eh = eh->oh;
4900
4901 /* Function descriptor syms cause the associated
4902 function code sym section to be marked. */
4903 if (eh->is_func_descriptor)
4904 {
4905 /* They also mark their opd section. */
4906 if (!eh->elf.root.u.def.section->gc_mark)
4907 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4908 ppc64_elf_gc_mark_hook);
4909
4910 rsec = eh->oh->elf.root.u.def.section;
4911 }
4912 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4913 && opd_entry_value (eh->elf.root.u.def.section,
4914 eh->elf.root.u.def.value,
4915 &rsec, NULL) != (bfd_vma) -1)
4916 {
4917 if (!eh->elf.root.u.def.section->gc_mark)
4918 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4919 ppc64_elf_gc_mark_hook);
4920 }
4921 else
4922 rsec = h->root.u.def.section;
4923 break;
4924
4925 case bfd_link_hash_common:
4926 rsec = h->root.u.c.p->section;
4927 break;
4928
4929 default:
4930 break;
4931 }
4932 }
4933 }
4934 else
4935 {
4936 asection **opd_sym_section;
4937
4938 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4939 opd_sym_section = get_opd_info (rsec);
4940 if (opd_sym_section != NULL)
4941 {
4942 if (!rsec->gc_mark)
4943 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4944
4945 rsec = opd_sym_section[sym->st_value / 8];
4946 }
4947 }
4948
4949 return rsec;
4950 }
4951
4952 /* Update the .got, .plt. and dynamic reloc reference counts for the
4953 section being removed. */
4954
4955 static bfd_boolean
4956 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4957 asection *sec, const Elf_Internal_Rela *relocs)
4958 {
4959 struct ppc_link_hash_table *htab;
4960 Elf_Internal_Shdr *symtab_hdr;
4961 struct elf_link_hash_entry **sym_hashes;
4962 struct got_entry **local_got_ents;
4963 const Elf_Internal_Rela *rel, *relend;
4964
4965 if ((sec->flags & SEC_ALLOC) == 0)
4966 return TRUE;
4967
4968 elf_section_data (sec)->local_dynrel = NULL;
4969
4970 htab = ppc_hash_table (info);
4971 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4972 sym_hashes = elf_sym_hashes (abfd);
4973 local_got_ents = elf_local_got_ents (abfd);
4974
4975 relend = relocs + sec->reloc_count;
4976 for (rel = relocs; rel < relend; rel++)
4977 {
4978 unsigned long r_symndx;
4979 enum elf_ppc64_reloc_type r_type;
4980 struct elf_link_hash_entry *h = NULL;
4981 char tls_type = 0;
4982
4983 r_symndx = ELF64_R_SYM (rel->r_info);
4984 r_type = ELF64_R_TYPE (rel->r_info);
4985 if (r_symndx >= symtab_hdr->sh_info)
4986 {
4987 struct ppc_link_hash_entry *eh;
4988 struct ppc_dyn_relocs **pp;
4989 struct ppc_dyn_relocs *p;
4990
4991 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4992 while (h->root.type == bfd_link_hash_indirect
4993 || h->root.type == bfd_link_hash_warning)
4994 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4995 eh = (struct ppc_link_hash_entry *) h;
4996
4997 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4998 if (p->sec == sec)
4999 {
5000 /* Everything must go for SEC. */
5001 *pp = p->next;
5002 break;
5003 }
5004 }
5005
5006 switch (r_type)
5007 {
5008 case R_PPC64_GOT_TLSLD16:
5009 case R_PPC64_GOT_TLSLD16_LO:
5010 case R_PPC64_GOT_TLSLD16_HI:
5011 case R_PPC64_GOT_TLSLD16_HA:
5012 ppc64_tlsld_got (abfd)->refcount -= 1;
5013 tls_type = TLS_TLS | TLS_LD;
5014 goto dogot;
5015
5016 case R_PPC64_GOT_TLSGD16:
5017 case R_PPC64_GOT_TLSGD16_LO:
5018 case R_PPC64_GOT_TLSGD16_HI:
5019 case R_PPC64_GOT_TLSGD16_HA:
5020 tls_type = TLS_TLS | TLS_GD;
5021 goto dogot;
5022
5023 case R_PPC64_GOT_TPREL16_DS:
5024 case R_PPC64_GOT_TPREL16_LO_DS:
5025 case R_PPC64_GOT_TPREL16_HI:
5026 case R_PPC64_GOT_TPREL16_HA:
5027 tls_type = TLS_TLS | TLS_TPREL;
5028 goto dogot;
5029
5030 case R_PPC64_GOT_DTPREL16_DS:
5031 case R_PPC64_GOT_DTPREL16_LO_DS:
5032 case R_PPC64_GOT_DTPREL16_HI:
5033 case R_PPC64_GOT_DTPREL16_HA:
5034 tls_type = TLS_TLS | TLS_DTPREL;
5035 goto dogot;
5036
5037 case R_PPC64_GOT16:
5038 case R_PPC64_GOT16_DS:
5039 case R_PPC64_GOT16_HA:
5040 case R_PPC64_GOT16_HI:
5041 case R_PPC64_GOT16_LO:
5042 case R_PPC64_GOT16_LO_DS:
5043 dogot:
5044 {
5045 struct got_entry *ent;
5046
5047 if (h != NULL)
5048 ent = h->got.glist;
5049 else
5050 ent = local_got_ents[r_symndx];
5051
5052 for (; ent != NULL; ent = ent->next)
5053 if (ent->addend == rel->r_addend
5054 && ent->owner == abfd
5055 && ent->tls_type == tls_type)
5056 break;
5057 if (ent == NULL)
5058 abort ();
5059 if (ent->got.refcount > 0)
5060 ent->got.refcount -= 1;
5061 }
5062 break;
5063
5064 case R_PPC64_PLT16_HA:
5065 case R_PPC64_PLT16_HI:
5066 case R_PPC64_PLT16_LO:
5067 case R_PPC64_PLT32:
5068 case R_PPC64_PLT64:
5069 case R_PPC64_REL14:
5070 case R_PPC64_REL14_BRNTAKEN:
5071 case R_PPC64_REL14_BRTAKEN:
5072 case R_PPC64_REL24:
5073 if (h != NULL)
5074 {
5075 struct plt_entry *ent;
5076
5077 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5078 if (ent->addend == rel->r_addend)
5079 break;
5080 if (ent == NULL)
5081 abort ();
5082 if (ent->plt.refcount > 0)
5083 ent->plt.refcount -= 1;
5084 }
5085 break;
5086
5087 default:
5088 break;
5089 }
5090 }
5091 return TRUE;
5092 }
5093
5094 /* The maximum size of .sfpr. */
5095 #define SFPR_MAX (218*4)
5096
5097 struct sfpr_def_parms
5098 {
5099 const char name[12];
5100 unsigned char lo, hi;
5101 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5102 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5103 };
5104
5105 /* Auto-generate _save*, _rest* functions in .sfpr. */
5106
5107 static unsigned int
5108 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5109 {
5110 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5111 unsigned int i;
5112 size_t len = strlen (parm->name);
5113 bfd_boolean writing = FALSE;
5114 char sym[16];
5115
5116 memcpy (sym, parm->name, len);
5117 sym[len + 2] = 0;
5118
5119 for (i = parm->lo; i <= parm->hi; i++)
5120 {
5121 struct elf_link_hash_entry *h;
5122
5123 sym[len + 0] = i / 10 + '0';
5124 sym[len + 1] = i % 10 + '0';
5125 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5126 if (h != NULL
5127 && !h->def_regular)
5128 {
5129 h->root.type = bfd_link_hash_defined;
5130 h->root.u.def.section = htab->sfpr;
5131 h->root.u.def.value = htab->sfpr->size;
5132 h->type = STT_FUNC;
5133 h->def_regular = 1;
5134 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5135 writing = TRUE;
5136 if (htab->sfpr->contents == NULL)
5137 {
5138 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5139 if (htab->sfpr->contents == NULL)
5140 return FALSE;
5141 }
5142 }
5143 if (writing)
5144 {
5145 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5146 if (i != parm->hi)
5147 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5148 else
5149 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5150 htab->sfpr->size = p - htab->sfpr->contents;
5151 }
5152 }
5153
5154 return TRUE;
5155 }
5156
5157 static bfd_byte *
5158 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5159 {
5160 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5161 return p + 4;
5162 }
5163
5164 static bfd_byte *
5165 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5166 {
5167 p = savegpr0 (abfd, p, r);
5168 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5169 p = p + 4;
5170 bfd_put_32 (abfd, BLR, p);
5171 return p + 4;
5172 }
5173
5174 static bfd_byte *
5175 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5176 {
5177 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5178 return p + 4;
5179 }
5180
5181 static bfd_byte *
5182 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5183 {
5184 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5185 p = p + 4;
5186 p = restgpr0 (abfd, p, r);
5187 bfd_put_32 (abfd, MTLR_R0, p);
5188 p = p + 4;
5189 if (r == 29)
5190 {
5191 p = restgpr0 (abfd, p, 30);
5192 p = restgpr0 (abfd, p, 31);
5193 }
5194 bfd_put_32 (abfd, BLR, p);
5195 return p + 4;
5196 }
5197
5198 static bfd_byte *
5199 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5200 {
5201 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5202 return p + 4;
5203 }
5204
5205 static bfd_byte *
5206 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5207 {
5208 p = savegpr1 (abfd, p, r);
5209 bfd_put_32 (abfd, BLR, p);
5210 return p + 4;
5211 }
5212
5213 static bfd_byte *
5214 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5215 {
5216 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5217 return p + 4;
5218 }
5219
5220 static bfd_byte *
5221 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5222 {
5223 p = restgpr1 (abfd, p, r);
5224 bfd_put_32 (abfd, BLR, p);
5225 return p + 4;
5226 }
5227
5228 static bfd_byte *
5229 savefpr (bfd *abfd, bfd_byte *p, int r)
5230 {
5231 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5232 return p + 4;
5233 }
5234
5235 static bfd_byte *
5236 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5237 {
5238 p = savefpr (abfd, p, r);
5239 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5240 p = p + 4;
5241 bfd_put_32 (abfd, BLR, p);
5242 return p + 4;
5243 }
5244
5245 static bfd_byte *
5246 restfpr (bfd *abfd, bfd_byte *p, int r)
5247 {
5248 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5249 return p + 4;
5250 }
5251
5252 static bfd_byte *
5253 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5254 {
5255 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5256 p = p + 4;
5257 p = restfpr (abfd, p, r);
5258 bfd_put_32 (abfd, MTLR_R0, p);
5259 p = p + 4;
5260 if (r == 29)
5261 {
5262 p = restfpr (abfd, p, 30);
5263 p = restfpr (abfd, p, 31);
5264 }
5265 bfd_put_32 (abfd, BLR, p);
5266 return p + 4;
5267 }
5268
5269 static bfd_byte *
5270 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5271 {
5272 p = savefpr (abfd, p, r);
5273 bfd_put_32 (abfd, BLR, p);
5274 return p + 4;
5275 }
5276
5277 static bfd_byte *
5278 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5279 {
5280 p = restfpr (abfd, p, r);
5281 bfd_put_32 (abfd, BLR, p);
5282 return p + 4;
5283 }
5284
5285 static bfd_byte *
5286 savevr (bfd *abfd, bfd_byte *p, int r)
5287 {
5288 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5289 p = p + 4;
5290 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5291 return p + 4;
5292 }
5293
5294 static bfd_byte *
5295 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5296 {
5297 p = savevr (abfd, p, r);
5298 bfd_put_32 (abfd, BLR, p);
5299 return p + 4;
5300 }
5301
5302 static bfd_byte *
5303 restvr (bfd *abfd, bfd_byte *p, int r)
5304 {
5305 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5306 p = p + 4;
5307 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5308 return p + 4;
5309 }
5310
5311 static bfd_byte *
5312 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5313 {
5314 p = restvr (abfd, p, r);
5315 bfd_put_32 (abfd, BLR, p);
5316 return p + 4;
5317 }
5318
5319 /* Called via elf_link_hash_traverse to transfer dynamic linking
5320 information on function code symbol entries to their corresponding
5321 function descriptor symbol entries. */
5322
5323 static bfd_boolean
5324 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5325 {
5326 struct bfd_link_info *info;
5327 struct ppc_link_hash_table *htab;
5328 struct plt_entry *ent;
5329 struct ppc_link_hash_entry *fh;
5330 struct ppc_link_hash_entry *fdh;
5331 bfd_boolean force_local;
5332
5333 fh = (struct ppc_link_hash_entry *) h;
5334 if (fh->elf.root.type == bfd_link_hash_indirect)
5335 return TRUE;
5336
5337 if (fh->elf.root.type == bfd_link_hash_warning)
5338 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5339
5340 info = inf;
5341 htab = ppc_hash_table (info);
5342
5343 /* Resolve undefined references to dot-symbols as the value
5344 in the function descriptor, if we have one in a regular object.
5345 This is to satisfy cases like ".quad .foo". Calls to functions
5346 in dynamic objects are handled elsewhere. */
5347 if (fh->elf.root.type == bfd_link_hash_undefweak
5348 && fh->was_undefined
5349 && (fh->oh->elf.root.type == bfd_link_hash_defined
5350 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5351 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5352 && opd_entry_value (fh->oh->elf.root.u.def.section,
5353 fh->oh->elf.root.u.def.value,
5354 &fh->elf.root.u.def.section,
5355 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5356 {
5357 fh->elf.root.type = fh->oh->elf.root.type;
5358 fh->elf.forced_local = 1;
5359 }
5360
5361 /* If this is a function code symbol, transfer dynamic linking
5362 information to the function descriptor symbol. */
5363 if (!fh->is_func)
5364 return TRUE;
5365
5366 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5367 if (ent->plt.refcount > 0)
5368 break;
5369 if (ent == NULL
5370 || fh->elf.root.root.string[0] != '.'
5371 || fh->elf.root.root.string[1] == '\0')
5372 return TRUE;
5373
5374 /* Find the corresponding function descriptor symbol. Create it
5375 as undefined if necessary. */
5376
5377 fdh = get_fdh (fh, htab);
5378 if (fdh != NULL)
5379 while (fdh->elf.root.type == bfd_link_hash_indirect
5380 || fdh->elf.root.type == bfd_link_hash_warning)
5381 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5382
5383 if (fdh == NULL
5384 && info->shared
5385 && (fh->elf.root.type == bfd_link_hash_undefined
5386 || fh->elf.root.type == bfd_link_hash_undefweak))
5387 {
5388 bfd *abfd;
5389 asymbol *newsym;
5390 struct bfd_link_hash_entry *bh;
5391
5392 abfd = fh->elf.root.u.undef.abfd;
5393 newsym = bfd_make_empty_symbol (abfd);
5394 newsym->name = fh->elf.root.root.string + 1;
5395 newsym->section = bfd_und_section_ptr;
5396 newsym->value = 0;
5397 newsym->flags = BSF_OBJECT;
5398 if (fh->elf.root.type == bfd_link_hash_undefweak)
5399 newsym->flags |= BSF_WEAK;
5400
5401 bh = &fdh->elf.root;
5402 if ( !(_bfd_generic_link_add_one_symbol
5403 (info, abfd, newsym->name, newsym->flags,
5404 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
5405 {
5406 return FALSE;
5407 }
5408 fdh = (struct ppc_link_hash_entry *) bh;
5409 fdh->elf.non_elf = 0;
5410 fdh->elf.size = 24;
5411 fdh->elf.type = STT_OBJECT;
5412 }
5413
5414 if (fdh != NULL
5415 && !fdh->elf.forced_local
5416 && (info->shared
5417 || fdh->elf.def_dynamic
5418 || fdh->elf.ref_dynamic
5419 || (fdh->elf.root.type == bfd_link_hash_undefweak
5420 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5421 {
5422 if (fdh->elf.dynindx == -1)
5423 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5424 return FALSE;
5425 fdh->elf.ref_regular |= fh->elf.ref_regular;
5426 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5427 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5428 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5429 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5430 {
5431 struct plt_entry **ep = &fdh->elf.plt.plist;
5432 while (*ep != NULL)
5433 ep = &(*ep)->next;
5434 *ep = fh->elf.plt.plist;
5435 fh->elf.plt.plist = NULL;
5436 fdh->elf.needs_plt = 1;
5437 }
5438 fdh->is_func_descriptor = 1;
5439 fdh->oh = fh;
5440 fh->oh = fdh;
5441 }
5442
5443 /* Now that the info is on the function descriptor, clear the
5444 function code sym info. Any function code syms for which we
5445 don't have a definition in a regular file, we force local.
5446 This prevents a shared library from exporting syms that have
5447 been imported from another library. Function code syms that
5448 are really in the library we must leave global to prevent the
5449 linker dragging in a definition from a static library. */
5450 force_local
5451 = (info->shared
5452 && (!fh->elf.def_regular
5453 || fdh == NULL
5454 || !fdh->elf.def_regular
5455 || fdh->elf.forced_local));
5456 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5457
5458 return TRUE;
5459 }
5460
5461 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5462 this hook to a) provide some gcc support functions, and b) transfer
5463 dynamic linking information gathered so far on function code symbol
5464 entries, to their corresponding function descriptor symbol entries. */
5465
5466 static bfd_boolean
5467 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5468 struct bfd_link_info *info)
5469 {
5470 struct ppc_link_hash_table *htab;
5471 unsigned int i;
5472 const struct sfpr_def_parms funcs[] =
5473 {
5474 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5475 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5476 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5477 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5478 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5479 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5480 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5481 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5482 { "._savef", 14, 31, savefpr, savefpr1_tail },
5483 { "._restf", 14, 31, restfpr, restfpr1_tail },
5484 { "_savevr_", 20, 31, savevr, savevr_tail },
5485 { "_restvr_", 20, 31, restvr, restvr_tail }
5486 };
5487
5488 htab = ppc_hash_table (info);
5489 if (htab->sfpr == NULL)
5490 /* We don't have any relocs. */
5491 return TRUE;
5492
5493 /* Provide any missing _save* and _rest* functions. */
5494 htab->sfpr->size = 0;
5495 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5496 if (!sfpr_define (info, &funcs[i]))
5497 return FALSE;
5498
5499 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5500
5501 if (htab->sfpr->size == 0)
5502 _bfd_strip_section_from_output (info, htab->sfpr);
5503
5504 return TRUE;
5505 }
5506
5507 /* Adjust a symbol defined by a dynamic object and referenced by a
5508 regular object. The current definition is in some section of the
5509 dynamic object, but we're not including those sections. We have to
5510 change the definition to something the rest of the link can
5511 understand. */
5512
5513 static bfd_boolean
5514 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5515 struct elf_link_hash_entry *h)
5516 {
5517 struct ppc_link_hash_table *htab;
5518 asection *s;
5519 unsigned int power_of_two;
5520
5521 htab = ppc_hash_table (info);
5522
5523 /* Deal with function syms. */
5524 if (h->type == STT_FUNC
5525 || h->needs_plt)
5526 {
5527 /* Clear procedure linkage table information for any symbol that
5528 won't need a .plt entry. */
5529 struct plt_entry *ent;
5530 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5531 if (ent->plt.refcount > 0)
5532 break;
5533 if (ent == NULL
5534 || SYMBOL_CALLS_LOCAL (info, h)
5535 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5536 && h->root.type == bfd_link_hash_undefweak))
5537 {
5538 h->plt.plist = NULL;
5539 h->needs_plt = 0;
5540 }
5541 }
5542 else
5543 h->plt.plist = NULL;
5544
5545 /* If this is a weak symbol, and there is a real definition, the
5546 processor independent code will have arranged for us to see the
5547 real definition first, and we can just use the same value. */
5548 if (h->u.weakdef != NULL)
5549 {
5550 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5551 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5552 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5553 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5554 if (ELIMINATE_COPY_RELOCS)
5555 h->non_got_ref = h->u.weakdef->non_got_ref;
5556 return TRUE;
5557 }
5558
5559 /* If we are creating a shared library, we must presume that the
5560 only references to the symbol are via the global offset table.
5561 For such cases we need not do anything here; the relocations will
5562 be handled correctly by relocate_section. */
5563 if (info->shared)
5564 return TRUE;
5565
5566 /* If there are no references to this symbol that do not use the
5567 GOT, we don't need to generate a copy reloc. */
5568 if (!h->non_got_ref)
5569 return TRUE;
5570
5571 if (ELIMINATE_COPY_RELOCS)
5572 {
5573 struct ppc_link_hash_entry * eh;
5574 struct ppc_dyn_relocs *p;
5575
5576 eh = (struct ppc_link_hash_entry *) h;
5577 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5578 {
5579 s = p->sec->output_section;
5580 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5581 break;
5582 }
5583
5584 /* If we didn't find any dynamic relocs in read-only sections, then
5585 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5586 if (p == NULL)
5587 {
5588 h->non_got_ref = 0;
5589 return TRUE;
5590 }
5591 }
5592
5593 if (h->plt.plist != NULL)
5594 {
5595 /* We should never get here, but unfortunately there are versions
5596 of gcc out there that improperly (for this ABI) put initialized
5597 function pointers, vtable refs and suchlike in read-only
5598 sections. Allow them to proceed, but warn that this might
5599 break at runtime. */
5600 (*_bfd_error_handler)
5601 (_("copy reloc against `%s' requires lazy plt linking; "
5602 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5603 h->root.root.string);
5604 }
5605
5606 /* This is a reference to a symbol defined by a dynamic object which
5607 is not a function. */
5608
5609 /* We must allocate the symbol in our .dynbss section, which will
5610 become part of the .bss section of the executable. There will be
5611 an entry for this symbol in the .dynsym section. The dynamic
5612 object will contain position independent code, so all references
5613 from the dynamic object to this symbol will go through the global
5614 offset table. The dynamic linker will use the .dynsym entry to
5615 determine the address it must put in the global offset table, so
5616 both the dynamic object and the regular object will refer to the
5617 same memory location for the variable. */
5618
5619 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5620 to copy the initial value out of the dynamic object and into the
5621 runtime process image. We need to remember the offset into the
5622 .rela.bss section we are going to use. */
5623 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5624 {
5625 htab->relbss->size += sizeof (Elf64_External_Rela);
5626 h->needs_copy = 1;
5627 }
5628
5629 /* We need to figure out the alignment required for this symbol. I
5630 have no idea how ELF linkers handle this. */
5631 power_of_two = bfd_log2 (h->size);
5632 if (power_of_two > 4)
5633 power_of_two = 4;
5634
5635 /* Apply the required alignment. */
5636 s = htab->dynbss;
5637 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5638 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5639 {
5640 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5641 return FALSE;
5642 }
5643
5644 /* Define the symbol as being at this point in the section. */
5645 h->root.u.def.section = s;
5646 h->root.u.def.value = s->size;
5647
5648 /* Increment the section size to make room for the symbol. */
5649 s->size += h->size;
5650
5651 return TRUE;
5652 }
5653
5654 /* If given a function descriptor symbol, hide both the function code
5655 sym and the descriptor. */
5656 static void
5657 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5658 struct elf_link_hash_entry *h,
5659 bfd_boolean force_local)
5660 {
5661 struct ppc_link_hash_entry *eh;
5662 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5663
5664 eh = (struct ppc_link_hash_entry *) h;
5665 if (eh->is_func_descriptor)
5666 {
5667 struct ppc_link_hash_entry *fh = eh->oh;
5668
5669 if (fh == NULL)
5670 {
5671 const char *p, *q;
5672 struct ppc_link_hash_table *htab;
5673 char save;
5674
5675 /* We aren't supposed to use alloca in BFD because on
5676 systems which do not have alloca the version in libiberty
5677 calls xmalloc, which might cause the program to crash
5678 when it runs out of memory. This function doesn't have a
5679 return status, so there's no way to gracefully return an
5680 error. So cheat. We know that string[-1] can be safely
5681 accessed; It's either a string in an ELF string table,
5682 or allocated in an objalloc structure. */
5683
5684 p = eh->elf.root.root.string - 1;
5685 save = *p;
5686 *(char *) p = '.';
5687 htab = ppc_hash_table (info);
5688 fh = (struct ppc_link_hash_entry *)
5689 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5690 *(char *) p = save;
5691
5692 /* Unfortunately, if it so happens that the string we were
5693 looking for was allocated immediately before this string,
5694 then we overwrote the string terminator. That's the only
5695 reason the lookup should fail. */
5696 if (fh == NULL)
5697 {
5698 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5699 while (q >= eh->elf.root.root.string && *q == *p)
5700 --q, --p;
5701 if (q < eh->elf.root.root.string && *p == '.')
5702 fh = (struct ppc_link_hash_entry *)
5703 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5704 }
5705 if (fh != NULL)
5706 {
5707 eh->oh = fh;
5708 fh->oh = eh;
5709 }
5710 }
5711 if (fh != NULL)
5712 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5713 }
5714 }
5715
5716 static bfd_boolean
5717 get_sym_h (struct elf_link_hash_entry **hp,
5718 Elf_Internal_Sym **symp,
5719 asection **symsecp,
5720 char **tls_maskp,
5721 Elf_Internal_Sym **locsymsp,
5722 unsigned long r_symndx,
5723 bfd *ibfd)
5724 {
5725 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5726
5727 if (r_symndx >= symtab_hdr->sh_info)
5728 {
5729 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5730 struct elf_link_hash_entry *h;
5731
5732 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5733 while (h->root.type == bfd_link_hash_indirect
5734 || h->root.type == bfd_link_hash_warning)
5735 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5736
5737 if (hp != NULL)
5738 *hp = h;
5739
5740 if (symp != NULL)
5741 *symp = NULL;
5742
5743 if (symsecp != NULL)
5744 {
5745 asection *symsec = NULL;
5746 if (h->root.type == bfd_link_hash_defined
5747 || h->root.type == bfd_link_hash_defweak)
5748 symsec = h->root.u.def.section;
5749 *symsecp = symsec;
5750 }
5751
5752 if (tls_maskp != NULL)
5753 {
5754 struct ppc_link_hash_entry *eh;
5755
5756 eh = (struct ppc_link_hash_entry *) h;
5757 *tls_maskp = &eh->tls_mask;
5758 }
5759 }
5760 else
5761 {
5762 Elf_Internal_Sym *sym;
5763 Elf_Internal_Sym *locsyms = *locsymsp;
5764
5765 if (locsyms == NULL)
5766 {
5767 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5768 if (locsyms == NULL)
5769 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5770 symtab_hdr->sh_info,
5771 0, NULL, NULL, NULL);
5772 if (locsyms == NULL)
5773 return FALSE;
5774 *locsymsp = locsyms;
5775 }
5776 sym = locsyms + r_symndx;
5777
5778 if (hp != NULL)
5779 *hp = NULL;
5780
5781 if (symp != NULL)
5782 *symp = sym;
5783
5784 if (symsecp != NULL)
5785 {
5786 asection *symsec = NULL;
5787 if ((sym->st_shndx != SHN_UNDEF
5788 && sym->st_shndx < SHN_LORESERVE)
5789 || sym->st_shndx > SHN_HIRESERVE)
5790 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5791 *symsecp = symsec;
5792 }
5793
5794 if (tls_maskp != NULL)
5795 {
5796 struct got_entry **lgot_ents;
5797 char *tls_mask;
5798
5799 tls_mask = NULL;
5800 lgot_ents = elf_local_got_ents (ibfd);
5801 if (lgot_ents != NULL)
5802 {
5803 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5804 tls_mask = &lgot_masks[r_symndx];
5805 }
5806 *tls_maskp = tls_mask;
5807 }
5808 }
5809 return TRUE;
5810 }
5811
5812 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5813 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5814 type suitable for optimization, and 1 otherwise. */
5815
5816 static int
5817 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5818 Elf_Internal_Sym **locsymsp,
5819 const Elf_Internal_Rela *rel, bfd *ibfd)
5820 {
5821 unsigned long r_symndx;
5822 int next_r;
5823 struct elf_link_hash_entry *h;
5824 Elf_Internal_Sym *sym;
5825 asection *sec;
5826 bfd_vma off;
5827
5828 r_symndx = ELF64_R_SYM (rel->r_info);
5829 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5830 return 0;
5831
5832 if ((*tls_maskp != NULL && **tls_maskp != 0)
5833 || sec == NULL
5834 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5835 return 1;
5836
5837 /* Look inside a TOC section too. */
5838 if (h != NULL)
5839 {
5840 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5841 off = h->root.u.def.value;
5842 }
5843 else
5844 off = sym->st_value;
5845 off += rel->r_addend;
5846 BFD_ASSERT (off % 8 == 0);
5847 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5848 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5849 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5850 return 0;
5851 if (toc_symndx != NULL)
5852 *toc_symndx = r_symndx;
5853 if ((h == NULL
5854 || ((h->root.type == bfd_link_hash_defined
5855 || h->root.type == bfd_link_hash_defweak)
5856 && !h->def_dynamic))
5857 && (next_r == -1 || next_r == -2))
5858 return 1 - next_r;
5859 return 1;
5860 }
5861
5862 /* Adjust all global syms defined in opd sections. In gcc generated
5863 code for the old ABI, these will already have been done. */
5864
5865 static bfd_boolean
5866 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5867 {
5868 struct ppc_link_hash_entry *eh;
5869 asection *sym_sec;
5870 long *opd_adjust;
5871
5872 if (h->root.type == bfd_link_hash_indirect)
5873 return TRUE;
5874
5875 if (h->root.type == bfd_link_hash_warning)
5876 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5877
5878 if (h->root.type != bfd_link_hash_defined
5879 && h->root.type != bfd_link_hash_defweak)
5880 return TRUE;
5881
5882 eh = (struct ppc_link_hash_entry *) h;
5883 if (eh->adjust_done)
5884 return TRUE;
5885
5886 sym_sec = eh->elf.root.u.def.section;
5887 opd_adjust = get_opd_info (sym_sec);
5888 if (opd_adjust != NULL)
5889 {
5890 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5891 if (adjust == -1)
5892 {
5893 /* This entry has been deleted. */
5894 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5895 if (dsec == NULL)
5896 {
5897 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5898 if (elf_discarded_section (dsec))
5899 {
5900 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5901 break;
5902 }
5903 }
5904 eh->elf.root.u.def.value = 0;
5905 eh->elf.root.u.def.section = dsec;
5906 }
5907 else
5908 eh->elf.root.u.def.value += adjust;
5909 eh->adjust_done = 1;
5910 }
5911 return TRUE;
5912 }
5913
5914 /* Remove unused Official Procedure Descriptor entries. Currently we
5915 only remove those associated with functions in discarded link-once
5916 sections, or weakly defined functions that have been overridden. It
5917 would be possible to remove many more entries for statically linked
5918 applications. */
5919
5920 bfd_boolean
5921 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5922 bfd_boolean non_overlapping)
5923 {
5924 bfd *ibfd;
5925 bfd_boolean some_edited = FALSE;
5926 asection *need_pad = NULL;
5927
5928 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5929 {
5930 asection *sec;
5931 Elf_Internal_Rela *relstart, *rel, *relend;
5932 Elf_Internal_Shdr *symtab_hdr;
5933 Elf_Internal_Sym *local_syms;
5934 struct elf_link_hash_entry **sym_hashes;
5935 bfd_vma offset;
5936 bfd_size_type amt;
5937 long *opd_adjust;
5938 bfd_boolean need_edit, add_aux_fields;
5939 bfd_size_type cnt_16b = 0;
5940
5941 sec = bfd_get_section_by_name (ibfd, ".opd");
5942 if (sec == NULL)
5943 continue;
5944
5945 amt = sec->size * sizeof (long) / 8;
5946 opd_adjust = get_opd_info (sec);
5947 if (opd_adjust == NULL)
5948 {
5949 /* check_relocs hasn't been called. Must be a ld -r link
5950 or --just-symbols object. */
5951 opd_adjust = bfd_zalloc (obfd, amt);
5952 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5953 }
5954 memset (opd_adjust, 0, amt);
5955
5956 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
5957 continue;
5958
5959 if (sec->output_section == bfd_abs_section_ptr)
5960 continue;
5961
5962 /* Look through the section relocs. */
5963 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5964 continue;
5965
5966 local_syms = NULL;
5967 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5968 sym_hashes = elf_sym_hashes (ibfd);
5969
5970 /* Read the relocations. */
5971 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5972 info->keep_memory);
5973 if (relstart == NULL)
5974 return FALSE;
5975
5976 /* First run through the relocs to check they are sane, and to
5977 determine whether we need to edit this opd section. */
5978 need_edit = FALSE;
5979 need_pad = sec;
5980 offset = 0;
5981 relend = relstart + sec->reloc_count;
5982 for (rel = relstart; rel < relend; )
5983 {
5984 enum elf_ppc64_reloc_type r_type;
5985 unsigned long r_symndx;
5986 asection *sym_sec;
5987 struct elf_link_hash_entry *h;
5988 Elf_Internal_Sym *sym;
5989
5990 /* .opd contains a regular array of 16 or 24 byte entries. We're
5991 only interested in the reloc pointing to a function entry
5992 point. */
5993 if (rel->r_offset != offset
5994 || rel + 1 >= relend
5995 || (rel + 1)->r_offset != offset + 8)
5996 {
5997 /* If someone messes with .opd alignment then after a
5998 "ld -r" we might have padding in the middle of .opd.
5999 Also, there's nothing to prevent someone putting
6000 something silly in .opd with the assembler. No .opd
6001 optimization for them! */
6002 broken_opd:
6003 (*_bfd_error_handler)
6004 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6005 need_edit = FALSE;
6006 break;
6007 }
6008
6009 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6010 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6011 {
6012 (*_bfd_error_handler)
6013 (_("%B: unexpected reloc type %u in .opd section"),
6014 ibfd, r_type);
6015 need_edit = FALSE;
6016 break;
6017 }
6018
6019 r_symndx = ELF64_R_SYM (rel->r_info);
6020 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6021 r_symndx, ibfd))
6022 goto error_ret;
6023
6024 if (sym_sec == NULL || sym_sec->owner == NULL)
6025 {
6026 const char *sym_name;
6027 if (h != NULL)
6028 sym_name = h->root.root.string;
6029 else
6030 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym);
6031
6032 (*_bfd_error_handler)
6033 (_("%B: undefined sym `%s' in .opd section"),
6034 ibfd, sym_name);
6035 need_edit = FALSE;
6036 break;
6037 }
6038
6039 /* opd entries are always for functions defined in the
6040 current input bfd. If the symbol isn't defined in the
6041 input bfd, then we won't be using the function in this
6042 bfd; It must be defined in a linkonce section in another
6043 bfd, or is weak. It's also possible that we are
6044 discarding the function due to a linker script /DISCARD/,
6045 which we test for via the output_section. */
6046 if (sym_sec->owner != ibfd
6047 || sym_sec->output_section == bfd_abs_section_ptr)
6048 need_edit = TRUE;
6049
6050 rel += 2;
6051 if (rel == relend
6052 || (rel + 1 == relend && rel->r_offset == offset + 16))
6053 {
6054 if (sec->size == offset + 24)
6055 {
6056 need_pad = NULL;
6057 break;
6058 }
6059 if (rel == relend && sec->size == offset + 16)
6060 {
6061 cnt_16b++;
6062 break;
6063 }
6064 goto broken_opd;
6065 }
6066
6067 if (rel->r_offset == offset + 24)
6068 offset += 24;
6069 else if (rel->r_offset != offset + 16)
6070 goto broken_opd;
6071 else if (rel + 1 < relend
6072 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6073 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6074 {
6075 offset += 16;
6076 cnt_16b++;
6077 }
6078 else if (rel + 2 < relend
6079 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6080 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6081 {
6082 offset += 24;
6083 rel += 1;
6084 }
6085 else
6086 goto broken_opd;
6087 }
6088
6089 add_aux_fields = non_overlapping && cnt_16b > 0;
6090
6091 if (need_edit || add_aux_fields)
6092 {
6093 Elf_Internal_Rela *write_rel;
6094 bfd_byte *rptr, *wptr;
6095 bfd_byte *new_contents = NULL;
6096 bfd_boolean skip;
6097 long opd_ent_size;
6098
6099 /* This seems a waste of time as input .opd sections are all
6100 zeros as generated by gcc, but I suppose there's no reason
6101 this will always be so. We might start putting something in
6102 the third word of .opd entries. */
6103 if ((sec->flags & SEC_IN_MEMORY) == 0)
6104 {
6105 bfd_byte *loc;
6106 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6107 {
6108 if (loc != NULL)
6109 free (loc);
6110 error_ret:
6111 if (local_syms != NULL
6112 && symtab_hdr->contents != (unsigned char *) local_syms)
6113 free (local_syms);
6114 if (elf_section_data (sec)->relocs != relstart)
6115 free (relstart);
6116 return FALSE;
6117 }
6118 sec->contents = loc;
6119 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6120 }
6121
6122 elf_section_data (sec)->relocs = relstart;
6123
6124 wptr = sec->contents;
6125 rptr = sec->contents;
6126 new_contents = sec->contents;
6127
6128 if (add_aux_fields)
6129 {
6130 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6131 if (new_contents == NULL)
6132 return FALSE;
6133 need_pad = FALSE;
6134 wptr = new_contents;
6135 }
6136
6137 write_rel = relstart;
6138 skip = FALSE;
6139 offset = 0;
6140 opd_ent_size = 0;
6141 for (rel = relstart; rel < relend; rel++)
6142 {
6143 unsigned long r_symndx;
6144 asection *sym_sec;
6145 struct elf_link_hash_entry *h;
6146 Elf_Internal_Sym *sym;
6147
6148 r_symndx = ELF64_R_SYM (rel->r_info);
6149 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6150 r_symndx, ibfd))
6151 goto error_ret;
6152
6153 if (rel->r_offset == offset)
6154 {
6155 struct ppc_link_hash_entry *fdh = NULL;
6156
6157 /* See if the .opd entry is full 24 byte or
6158 16 byte (with fd_aux entry overlapped with next
6159 fd_func). */
6160 opd_ent_size = 24;
6161 if ((rel + 2 == relend && sec->size == offset + 16)
6162 || (rel + 3 < relend
6163 && rel[2].r_offset == offset + 16
6164 && rel[3].r_offset == offset + 24
6165 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6166 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6167 opd_ent_size = 16;
6168
6169 if (h != NULL
6170 && h->root.root.string[0] == '.')
6171 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6172 ppc_hash_table (info));
6173
6174 skip = (sym_sec->owner != ibfd
6175 || sym_sec->output_section == bfd_abs_section_ptr);
6176 if (skip)
6177 {
6178 if (fdh != NULL && sym_sec->owner == ibfd)
6179 {
6180 /* Arrange for the function descriptor sym
6181 to be dropped. */
6182 fdh->elf.root.u.def.value = 0;
6183 fdh->elf.root.u.def.section = sym_sec;
6184 }
6185 opd_adjust[rel->r_offset / 8] = -1;
6186 }
6187 else
6188 {
6189 /* We'll be keeping this opd entry. */
6190
6191 if (fdh != NULL)
6192 {
6193 /* Redefine the function descriptor symbol to
6194 this location in the opd section. It is
6195 necessary to update the value here rather
6196 than using an array of adjustments as we do
6197 for local symbols, because various places
6198 in the generic ELF code use the value
6199 stored in u.def.value. */
6200 fdh->elf.root.u.def.value = wptr - new_contents;
6201 fdh->adjust_done = 1;
6202 }
6203
6204 /* Local syms are a bit tricky. We could
6205 tweak them as they can be cached, but
6206 we'd need to look through the local syms
6207 for the function descriptor sym which we
6208 don't have at the moment. So keep an
6209 array of adjustments. */
6210 opd_adjust[rel->r_offset / 8]
6211 = (wptr - new_contents) - (rptr - sec->contents);
6212
6213 if (wptr != rptr)
6214 memcpy (wptr, rptr, opd_ent_size);
6215 wptr += opd_ent_size;
6216 if (add_aux_fields && opd_ent_size == 16)
6217 {
6218 memset (wptr, '\0', 8);
6219 wptr += 8;
6220 }
6221 }
6222 rptr += opd_ent_size;
6223 offset += opd_ent_size;
6224 }
6225
6226 if (skip)
6227 {
6228 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6229 if (info->shared)
6230 {
6231 /* We won't be needing dynamic relocs here. */
6232 struct ppc_dyn_relocs **pp;
6233 struct ppc_dyn_relocs *p;
6234
6235 if (h != NULL)
6236 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6237 else if (sym_sec != NULL)
6238 pp = ((struct ppc_dyn_relocs **)
6239 &elf_section_data (sym_sec)->local_dynrel);
6240 else
6241 pp = ((struct ppc_dyn_relocs **)
6242 &elf_section_data (sec)->local_dynrel);
6243 while ((p = *pp) != NULL)
6244 {
6245 if (p->sec == sec)
6246 {
6247 p->count -= 1;
6248 if (p->count == 0)
6249 *pp = p->next;
6250 break;
6251 }
6252 pp = &p->next;
6253 }
6254 }
6255 }
6256 else
6257 {
6258 /* We need to adjust any reloc offsets to point to the
6259 new opd entries. While we're at it, we may as well
6260 remove redundant relocs. */
6261 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6262 if (write_rel != rel)
6263 memcpy (write_rel, rel, sizeof (*rel));
6264 ++write_rel;
6265 }
6266 }
6267
6268 sec->size = wptr - new_contents;
6269 sec->reloc_count = write_rel - relstart;
6270 if (add_aux_fields)
6271 {
6272 free (sec->contents);
6273 sec->contents = new_contents;
6274 }
6275
6276 /* Fudge the size too, as this is used later in
6277 elf_bfd_final_link if we are emitting relocs. */
6278 elf_section_data (sec)->rel_hdr.sh_size
6279 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6280 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6281 some_edited = TRUE;
6282 }
6283 else if (elf_section_data (sec)->relocs != relstart)
6284 free (relstart);
6285
6286 if (local_syms != NULL
6287 && symtab_hdr->contents != (unsigned char *) local_syms)
6288 {
6289 if (!info->keep_memory)
6290 free (local_syms);
6291 else
6292 symtab_hdr->contents = (unsigned char *) local_syms;
6293 }
6294 }
6295
6296 if (some_edited)
6297 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6298
6299 /* If we are doing a final link and the last .opd entry is just 16 byte
6300 long, add a 8 byte padding after it. */
6301 if (need_pad != NULL && !info->relocatable)
6302 {
6303 bfd_byte *p;
6304
6305 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6306 {
6307 BFD_ASSERT (need_pad->size > 0);
6308
6309 p = bfd_malloc (need_pad->size + 8);
6310 if (p == NULL)
6311 return FALSE;
6312
6313 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6314 p, 0, need_pad->size))
6315 return FALSE;
6316
6317 need_pad->contents = p;
6318 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6319 }
6320 else
6321 {
6322 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6323 if (p == NULL)
6324 return FALSE;
6325
6326 need_pad->contents = p;
6327 }
6328
6329 memset (need_pad->contents + need_pad->size, 0, 8);
6330 need_pad->size += 8;
6331 }
6332
6333 return TRUE;
6334 }
6335
6336 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6337
6338 asection *
6339 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6340 {
6341 struct ppc_link_hash_table *htab;
6342
6343 htab = ppc_hash_table (info);
6344 if (htab->tls_get_addr != NULL)
6345 {
6346 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6347
6348 while (h->elf.root.type == bfd_link_hash_indirect
6349 || h->elf.root.type == bfd_link_hash_warning)
6350 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6351
6352 htab->tls_get_addr = h;
6353
6354 if (htab->tls_get_addr_fd == NULL
6355 && h->oh != NULL
6356 && h->oh->is_func_descriptor)
6357 htab->tls_get_addr_fd = h->oh;
6358 }
6359
6360 if (htab->tls_get_addr_fd != NULL)
6361 {
6362 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6363
6364 while (h->elf.root.type == bfd_link_hash_indirect
6365 || h->elf.root.type == bfd_link_hash_warning)
6366 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6367
6368 htab->tls_get_addr_fd = h;
6369 }
6370
6371 return _bfd_elf_tls_setup (obfd, info);
6372 }
6373
6374 /* Run through all the TLS relocs looking for optimization
6375 opportunities. The linker has been hacked (see ppc64elf.em) to do
6376 a preliminary section layout so that we know the TLS segment
6377 offsets. We can't optimize earlier because some optimizations need
6378 to know the tp offset, and we need to optimize before allocating
6379 dynamic relocations. */
6380
6381 bfd_boolean
6382 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6383 {
6384 bfd *ibfd;
6385 asection *sec;
6386 struct ppc_link_hash_table *htab;
6387
6388 if (info->relocatable || info->shared)
6389 return TRUE;
6390
6391 htab = ppc_hash_table (info);
6392 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6393 {
6394 Elf_Internal_Sym *locsyms = NULL;
6395
6396 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6397 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6398 {
6399 Elf_Internal_Rela *relstart, *rel, *relend;
6400 int expecting_tls_get_addr;
6401
6402 /* Read the relocations. */
6403 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6404 info->keep_memory);
6405 if (relstart == NULL)
6406 return FALSE;
6407
6408 expecting_tls_get_addr = 0;
6409 relend = relstart + sec->reloc_count;
6410 for (rel = relstart; rel < relend; rel++)
6411 {
6412 enum elf_ppc64_reloc_type r_type;
6413 unsigned long r_symndx;
6414 struct elf_link_hash_entry *h;
6415 Elf_Internal_Sym *sym;
6416 asection *sym_sec;
6417 char *tls_mask;
6418 char tls_set, tls_clear, tls_type = 0;
6419 bfd_vma value;
6420 bfd_boolean ok_tprel, is_local;
6421
6422 r_symndx = ELF64_R_SYM (rel->r_info);
6423 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6424 r_symndx, ibfd))
6425 {
6426 err_free_rel:
6427 if (elf_section_data (sec)->relocs != relstart)
6428 free (relstart);
6429 if (locsyms != NULL
6430 && (elf_tdata (ibfd)->symtab_hdr.contents
6431 != (unsigned char *) locsyms))
6432 free (locsyms);
6433 return FALSE;
6434 }
6435
6436 if (h != NULL)
6437 {
6438 if (h->root.type != bfd_link_hash_defined
6439 && h->root.type != bfd_link_hash_defweak)
6440 continue;
6441 value = h->root.u.def.value;
6442 }
6443 else
6444 /* Symbols referenced by TLS relocs must be of type
6445 STT_TLS. So no need for .opd local sym adjust. */
6446 value = sym->st_value;
6447
6448 ok_tprel = FALSE;
6449 is_local = FALSE;
6450 if (h == NULL
6451 || !h->def_dynamic)
6452 {
6453 is_local = TRUE;
6454 value += sym_sec->output_offset;
6455 value += sym_sec->output_section->vma;
6456 value -= htab->elf.tls_sec->vma;
6457 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6458 < (bfd_vma) 1 << 32);
6459 }
6460
6461 r_type = ELF64_R_TYPE (rel->r_info);
6462 switch (r_type)
6463 {
6464 case R_PPC64_GOT_TLSLD16:
6465 case R_PPC64_GOT_TLSLD16_LO:
6466 case R_PPC64_GOT_TLSLD16_HI:
6467 case R_PPC64_GOT_TLSLD16_HA:
6468 /* These relocs should never be against a symbol
6469 defined in a shared lib. Leave them alone if
6470 that turns out to be the case. */
6471 ppc64_tlsld_got (ibfd)->refcount -= 1;
6472 if (!is_local)
6473 continue;
6474
6475 /* LD -> LE */
6476 tls_set = 0;
6477 tls_clear = TLS_LD;
6478 tls_type = TLS_TLS | TLS_LD;
6479 expecting_tls_get_addr = 1;
6480 break;
6481
6482 case R_PPC64_GOT_TLSGD16:
6483 case R_PPC64_GOT_TLSGD16_LO:
6484 case R_PPC64_GOT_TLSGD16_HI:
6485 case R_PPC64_GOT_TLSGD16_HA:
6486 if (ok_tprel)
6487 /* GD -> LE */
6488 tls_set = 0;
6489 else
6490 /* GD -> IE */
6491 tls_set = TLS_TLS | TLS_TPRELGD;
6492 tls_clear = TLS_GD;
6493 tls_type = TLS_TLS | TLS_GD;
6494 expecting_tls_get_addr = 1;
6495 break;
6496
6497 case R_PPC64_GOT_TPREL16_DS:
6498 case R_PPC64_GOT_TPREL16_LO_DS:
6499 case R_PPC64_GOT_TPREL16_HI:
6500 case R_PPC64_GOT_TPREL16_HA:
6501 expecting_tls_get_addr = 0;
6502 if (ok_tprel)
6503 {
6504 /* IE -> LE */
6505 tls_set = 0;
6506 tls_clear = TLS_TPREL;
6507 tls_type = TLS_TLS | TLS_TPREL;
6508 break;
6509 }
6510 else
6511 continue;
6512
6513 case R_PPC64_REL14:
6514 case R_PPC64_REL14_BRTAKEN:
6515 case R_PPC64_REL14_BRNTAKEN:
6516 case R_PPC64_REL24:
6517 if (h != NULL
6518 && (h == &htab->tls_get_addr->elf
6519 || h == &htab->tls_get_addr_fd->elf))
6520 {
6521 if (!expecting_tls_get_addr
6522 && rel != relstart
6523 && ((ELF64_R_TYPE (rel[-1].r_info)
6524 == R_PPC64_TOC16)
6525 || (ELF64_R_TYPE (rel[-1].r_info)
6526 == R_PPC64_TOC16_LO)))
6527 {
6528 /* Check for toc tls entries. */
6529 char *toc_tls;
6530 int retval;
6531
6532 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6533 rel - 1, ibfd);
6534 if (retval == 0)
6535 goto err_free_rel;
6536 if (toc_tls != NULL)
6537 expecting_tls_get_addr = retval > 1;
6538 }
6539
6540 if (expecting_tls_get_addr)
6541 {
6542 struct plt_entry *ent;
6543 for (ent = h->plt.plist; ent; ent = ent->next)
6544 if (ent->addend == 0)
6545 {
6546 if (ent->plt.refcount > 0)
6547 ent->plt.refcount -= 1;
6548 break;
6549 }
6550 }
6551 }
6552 expecting_tls_get_addr = 0;
6553 continue;
6554
6555 case R_PPC64_TPREL64:
6556 expecting_tls_get_addr = 0;
6557 if (ok_tprel)
6558 {
6559 /* IE -> LE */
6560 tls_set = TLS_EXPLICIT;
6561 tls_clear = TLS_TPREL;
6562 break;
6563 }
6564 else
6565 continue;
6566
6567 case R_PPC64_DTPMOD64:
6568 expecting_tls_get_addr = 0;
6569 if (rel + 1 < relend
6570 && (rel[1].r_info
6571 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6572 && rel[1].r_offset == rel->r_offset + 8)
6573 {
6574 if (ok_tprel)
6575 /* GD -> LE */
6576 tls_set = TLS_EXPLICIT | TLS_GD;
6577 else
6578 /* GD -> IE */
6579 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6580 tls_clear = TLS_GD;
6581 }
6582 else
6583 {
6584 if (!is_local)
6585 continue;
6586
6587 /* LD -> LE */
6588 tls_set = TLS_EXPLICIT;
6589 tls_clear = TLS_LD;
6590 }
6591 break;
6592
6593 default:
6594 expecting_tls_get_addr = 0;
6595 continue;
6596 }
6597
6598 if ((tls_set & TLS_EXPLICIT) == 0)
6599 {
6600 struct got_entry *ent;
6601
6602 /* Adjust got entry for this reloc. */
6603 if (h != NULL)
6604 ent = h->got.glist;
6605 else
6606 ent = elf_local_got_ents (ibfd)[r_symndx];
6607
6608 for (; ent != NULL; ent = ent->next)
6609 if (ent->addend == rel->r_addend
6610 && ent->owner == ibfd
6611 && ent->tls_type == tls_type)
6612 break;
6613 if (ent == NULL)
6614 abort ();
6615
6616 if (tls_set == 0)
6617 {
6618 /* We managed to get rid of a got entry. */
6619 if (ent->got.refcount > 0)
6620 ent->got.refcount -= 1;
6621 }
6622 }
6623 else if (h != NULL)
6624 {
6625 struct ppc_link_hash_entry * eh;
6626 struct ppc_dyn_relocs **pp;
6627 struct ppc_dyn_relocs *p;
6628
6629 /* Adjust dynamic relocs. */
6630 eh = (struct ppc_link_hash_entry *) h;
6631 for (pp = &eh->dyn_relocs;
6632 (p = *pp) != NULL;
6633 pp = &p->next)
6634 if (p->sec == sec)
6635 {
6636 /* If we got rid of a DTPMOD/DTPREL reloc
6637 pair then we'll lose one or two dyn
6638 relocs. */
6639 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6640 p->count -= 1;
6641 p->count -= 1;
6642 if (p->count == 0)
6643 *pp = p->next;
6644 break;
6645 }
6646 }
6647
6648 *tls_mask |= tls_set;
6649 *tls_mask &= ~tls_clear;
6650 }
6651
6652 if (elf_section_data (sec)->relocs != relstart)
6653 free (relstart);
6654 }
6655
6656 if (locsyms != NULL
6657 && (elf_tdata (ibfd)->symtab_hdr.contents
6658 != (unsigned char *) locsyms))
6659 {
6660 if (!info->keep_memory)
6661 free (locsyms);
6662 else
6663 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6664 }
6665 }
6666 return TRUE;
6667 }
6668
6669 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6670 the values of any global symbols in a toc section that has been
6671 edited. Globals in toc sections should be a rarity, so this function
6672 sets a flag if any are found in toc sections other than the one just
6673 edited, so that futher hash table traversals can be avoided. */
6674
6675 struct adjust_toc_info
6676 {
6677 asection *toc;
6678 unsigned long *skip;
6679 bfd_boolean global_toc_syms;
6680 };
6681
6682 static bfd_boolean
6683 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6684 {
6685 struct ppc_link_hash_entry *eh;
6686 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6687
6688 if (h->root.type == bfd_link_hash_indirect)
6689 return TRUE;
6690
6691 if (h->root.type == bfd_link_hash_warning)
6692 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6693
6694 if (h->root.type != bfd_link_hash_defined
6695 && h->root.type != bfd_link_hash_defweak)
6696 return TRUE;
6697
6698 eh = (struct ppc_link_hash_entry *) h;
6699 if (eh->adjust_done)
6700 return TRUE;
6701
6702 if (eh->elf.root.u.def.section == toc_inf->toc)
6703 {
6704 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6705 if (skip != (unsigned long) -1)
6706 eh->elf.root.u.def.value -= skip;
6707 else
6708 {
6709 (*_bfd_error_handler)
6710 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6711 eh->elf.root.u.def.section = &bfd_abs_section;
6712 eh->elf.root.u.def.value = 0;
6713 }
6714 eh->adjust_done = 1;
6715 }
6716 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6717 toc_inf->global_toc_syms = TRUE;
6718
6719 return TRUE;
6720 }
6721
6722 /* Examine all relocs referencing .toc sections in order to remove
6723 unused .toc entries. */
6724
6725 bfd_boolean
6726 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6727 {
6728 bfd *ibfd;
6729 struct adjust_toc_info toc_inf;
6730
6731 toc_inf.global_toc_syms = TRUE;
6732 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6733 {
6734 asection *toc, *sec;
6735 Elf_Internal_Shdr *symtab_hdr;
6736 Elf_Internal_Sym *local_syms;
6737 struct elf_link_hash_entry **sym_hashes;
6738 Elf_Internal_Rela *relstart, *rel, *wrel;
6739 unsigned long *skip, *drop;
6740 unsigned char *used;
6741 unsigned char *keep, last, some_unused;
6742
6743 toc = bfd_get_section_by_name (ibfd, ".toc");
6744 if (toc == NULL
6745 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6746 || elf_discarded_section (toc))
6747 continue;
6748
6749 local_syms = NULL;
6750 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6751 sym_hashes = elf_sym_hashes (ibfd);
6752
6753 /* Look at sections dropped from the final link. */
6754 skip = NULL;
6755 relstart = NULL;
6756 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6757 {
6758 if (sec->reloc_count == 0
6759 || !elf_discarded_section (sec)
6760 || get_opd_info (sec)
6761 || (sec->flags & SEC_ALLOC) == 0
6762 || (sec->flags & SEC_DEBUGGING) != 0)
6763 continue;
6764
6765 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6766 if (relstart == NULL)
6767 goto error_ret;
6768
6769 /* Run through the relocs to see which toc entries might be
6770 unused. */
6771 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6772 {
6773 enum elf_ppc64_reloc_type r_type;
6774 unsigned long r_symndx;
6775 asection *sym_sec;
6776 struct elf_link_hash_entry *h;
6777 Elf_Internal_Sym *sym;
6778 bfd_vma val;
6779
6780 r_type = ELF64_R_TYPE (rel->r_info);
6781 switch (r_type)
6782 {
6783 default:
6784 continue;
6785
6786 case R_PPC64_TOC16:
6787 case R_PPC64_TOC16_LO:
6788 case R_PPC64_TOC16_HI:
6789 case R_PPC64_TOC16_HA:
6790 case R_PPC64_TOC16_DS:
6791 case R_PPC64_TOC16_LO_DS:
6792 break;
6793 }
6794
6795 r_symndx = ELF64_R_SYM (rel->r_info);
6796 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6797 r_symndx, ibfd))
6798 goto error_ret;
6799
6800 if (sym_sec != toc)
6801 continue;
6802
6803 if (h != NULL)
6804 val = h->root.u.def.value;
6805 else
6806 val = sym->st_value;
6807 val += rel->r_addend;
6808
6809 if (val >= toc->size)
6810 continue;
6811
6812 /* Anything in the toc ought to be aligned to 8 bytes.
6813 If not, don't mark as unused. */
6814 if (val & 7)
6815 continue;
6816
6817 if (skip == NULL)
6818 {
6819 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6820 if (skip == NULL)
6821 goto error_ret;
6822 }
6823
6824 skip[val >> 3] = 1;
6825 }
6826
6827 if (elf_section_data (sec)->relocs != relstart)
6828 free (relstart);
6829 }
6830
6831 if (skip == NULL)
6832 continue;
6833
6834 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6835 if (used == NULL)
6836 {
6837 error_ret:
6838 if (local_syms != NULL
6839 && symtab_hdr->contents != (unsigned char *) local_syms)
6840 free (local_syms);
6841 if (sec != NULL
6842 && relstart != NULL
6843 && elf_section_data (sec)->relocs != relstart)
6844 free (relstart);
6845 if (skip != NULL)
6846 free (skip);
6847 return FALSE;
6848 }
6849
6850 /* Now check all kept sections that might reference the toc. */
6851 for (sec = ibfd->sections;
6852 sec != NULL;
6853 /* Check the toc itself last. */
6854 sec = (sec == toc ? NULL
6855 : sec->next == toc && sec->next->next ? sec->next->next
6856 : sec->next == NULL ? toc
6857 : sec->next))
6858 {
6859 int repeat;
6860
6861 if (sec->reloc_count == 0
6862 || elf_discarded_section (sec)
6863 || get_opd_info (sec)
6864 || (sec->flags & SEC_ALLOC) == 0
6865 || (sec->flags & SEC_DEBUGGING) != 0)
6866 continue;
6867
6868 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
6869 if (relstart == NULL)
6870 goto error_ret;
6871
6872 /* Mark toc entries referenced as used. */
6873 repeat = 0;
6874 do
6875 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6876 {
6877 enum elf_ppc64_reloc_type r_type;
6878 unsigned long r_symndx;
6879 asection *sym_sec;
6880 struct elf_link_hash_entry *h;
6881 Elf_Internal_Sym *sym;
6882 bfd_vma val;
6883
6884 r_type = ELF64_R_TYPE (rel->r_info);
6885 switch (r_type)
6886 {
6887 case R_PPC64_TOC16:
6888 case R_PPC64_TOC16_LO:
6889 case R_PPC64_TOC16_HI:
6890 case R_PPC64_TOC16_HA:
6891 case R_PPC64_TOC16_DS:
6892 case R_PPC64_TOC16_LO_DS:
6893 /* In case we're taking addresses of toc entries. */
6894 case R_PPC64_ADDR64:
6895 break;
6896
6897 default:
6898 continue;
6899 }
6900
6901 r_symndx = ELF64_R_SYM (rel->r_info);
6902 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6903 r_symndx, ibfd))
6904 {
6905 free (used);
6906 goto error_ret;
6907 }
6908
6909 if (sym_sec != toc)
6910 continue;
6911
6912 if (h != NULL)
6913 val = h->root.u.def.value;
6914 else
6915 val = sym->st_value;
6916 val += rel->r_addend;
6917
6918 if (val >= toc->size)
6919 continue;
6920
6921 /* For the toc section, we only mark as used if
6922 this entry itself isn't unused. */
6923 if (sec == toc
6924 && !used[val >> 3]
6925 && (used[rel->r_offset >> 3]
6926 || !skip[rel->r_offset >> 3]))
6927 /* Do all the relocs again, to catch reference
6928 chains. */
6929 repeat = 1;
6930
6931 used[val >> 3] = 1;
6932 }
6933 while (repeat);
6934 }
6935
6936 /* Merge the used and skip arrays. Assume that TOC
6937 doublewords not appearing as either used or unused belong
6938 to to an entry more than one doubleword in size. */
6939 for (drop = skip, keep = used, last = 0, some_unused = 0;
6940 drop < skip + (toc->size + 7) / 8;
6941 ++drop, ++keep)
6942 {
6943 if (*keep)
6944 {
6945 *drop = 0;
6946 last = 0;
6947 }
6948 else if (*drop)
6949 {
6950 some_unused = 1;
6951 last = 1;
6952 }
6953 else
6954 *drop = last;
6955 }
6956
6957 free (used);
6958
6959 if (some_unused)
6960 {
6961 bfd_byte *contents, *src;
6962 unsigned long off;
6963
6964 /* Shuffle the toc contents, and at the same time convert the
6965 skip array from booleans into offsets. */
6966 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
6967 goto error_ret;
6968
6969 elf_section_data (toc)->this_hdr.contents = contents;
6970
6971 for (src = contents, off = 0, drop = skip;
6972 src < contents + toc->size;
6973 src += 8, ++drop)
6974 {
6975 if (*drop)
6976 {
6977 *drop = (unsigned long) -1;
6978 off += 8;
6979 }
6980 else if (off != 0)
6981 {
6982 *drop = off;
6983 memcpy (src - off, src, 8);
6984 }
6985 }
6986 toc->rawsize = toc->size;
6987 toc->size = src - contents - off;
6988
6989 /* Read toc relocs. */
6990 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, TRUE);
6991 if (relstart == NULL)
6992 goto error_ret;
6993
6994 /* Remove unused toc relocs, and adjust those we keep. */
6995 wrel = relstart;
6996 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
6997 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
6998 {
6999 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7000 wrel->r_info = rel->r_info;
7001 wrel->r_addend = rel->r_addend;
7002 ++wrel;
7003 }
7004 toc->reloc_count = wrel - relstart;
7005 elf_section_data (toc)->rel_hdr.sh_size
7006 = toc->reloc_count * elf_section_data (toc)->rel_hdr.sh_entsize;
7007 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7008
7009 /* Adjust addends for relocs against the toc section sym. */
7010 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7011 {
7012 if (sec->reloc_count == 0
7013 || elf_discarded_section (sec))
7014 continue;
7015
7016 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7017 TRUE);
7018 if (relstart == NULL)
7019 goto error_ret;
7020
7021 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7022 {
7023 enum elf_ppc64_reloc_type r_type;
7024 unsigned long r_symndx;
7025 asection *sym_sec;
7026 struct elf_link_hash_entry *h;
7027 Elf_Internal_Sym *sym;
7028
7029 r_type = ELF64_R_TYPE (rel->r_info);
7030 switch (r_type)
7031 {
7032 default:
7033 continue;
7034
7035 case R_PPC64_TOC16:
7036 case R_PPC64_TOC16_LO:
7037 case R_PPC64_TOC16_HI:
7038 case R_PPC64_TOC16_HA:
7039 case R_PPC64_TOC16_DS:
7040 case R_PPC64_TOC16_LO_DS:
7041 case R_PPC64_ADDR64:
7042 break;
7043 }
7044
7045 r_symndx = ELF64_R_SYM (rel->r_info);
7046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7047 r_symndx, ibfd))
7048 goto error_ret;
7049
7050 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7051 continue;
7052
7053 rel->r_addend -= skip[rel->r_addend >> 3];
7054 }
7055 }
7056
7057 /* We shouldn't have local or global symbols defined in the TOC,
7058 but handle them anyway. */
7059 if (local_syms != NULL)
7060 {
7061 Elf_Internal_Sym *sym;
7062
7063 for (sym = local_syms;
7064 sym < local_syms + symtab_hdr->sh_info;
7065 ++sym)
7066 if (sym->st_shndx != SHN_UNDEF
7067 && (sym->st_shndx < SHN_LORESERVE
7068 || sym->st_shndx > SHN_HIRESERVE)
7069 && sym->st_value != 0
7070 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7071 {
7072 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7073 sym->st_value -= skip[sym->st_value >> 3];
7074 else
7075 {
7076 (*_bfd_error_handler)
7077 (_("%s defined in removed toc entry"),
7078 bfd_elf_sym_name (ibfd, symtab_hdr, sym));
7079 sym->st_value = 0;
7080 sym->st_shndx = SHN_ABS;
7081 }
7082 symtab_hdr->contents = (unsigned char *) local_syms;
7083 }
7084 }
7085
7086 /* Finally, adjust any global syms defined in the toc. */
7087 if (toc_inf.global_toc_syms)
7088 {
7089 toc_inf.toc = toc;
7090 toc_inf.skip = skip;
7091 toc_inf.global_toc_syms = FALSE;
7092 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7093 &toc_inf);
7094 }
7095 }
7096
7097 if (local_syms != NULL
7098 && symtab_hdr->contents != (unsigned char *) local_syms)
7099 {
7100 if (!info->keep_memory)
7101 free (local_syms);
7102 else
7103 symtab_hdr->contents = (unsigned char *) local_syms;
7104 }
7105 free (skip);
7106 }
7107
7108 return TRUE;
7109 }
7110
7111 /* Allocate space in .plt, .got and associated reloc sections for
7112 dynamic relocs. */
7113
7114 static bfd_boolean
7115 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7116 {
7117 struct bfd_link_info *info;
7118 struct ppc_link_hash_table *htab;
7119 asection *s;
7120 struct ppc_link_hash_entry *eh;
7121 struct ppc_dyn_relocs *p;
7122 struct got_entry *gent;
7123
7124 if (h->root.type == bfd_link_hash_indirect)
7125 return TRUE;
7126
7127 if (h->root.type == bfd_link_hash_warning)
7128 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7129
7130 info = (struct bfd_link_info *) inf;
7131 htab = ppc_hash_table (info);
7132
7133 if (htab->elf.dynamic_sections_created
7134 && h->dynindx != -1
7135 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7136 {
7137 struct plt_entry *pent;
7138 bfd_boolean doneone = FALSE;
7139 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7140 if (pent->plt.refcount > 0)
7141 {
7142 /* If this is the first .plt entry, make room for the special
7143 first entry. */
7144 s = htab->plt;
7145 if (s->size == 0)
7146 s->size += PLT_INITIAL_ENTRY_SIZE;
7147
7148 pent->plt.offset = s->size;
7149
7150 /* Make room for this entry. */
7151 s->size += PLT_ENTRY_SIZE;
7152
7153 /* Make room for the .glink code. */
7154 s = htab->glink;
7155 if (s->size == 0)
7156 s->size += GLINK_CALL_STUB_SIZE;
7157 /* We need bigger stubs past index 32767. */
7158 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7159 s->size += 4;
7160 s->size += 2*4;
7161
7162 /* We also need to make an entry in the .rela.plt section. */
7163 s = htab->relplt;
7164 s->size += sizeof (Elf64_External_Rela);
7165 doneone = TRUE;
7166 }
7167 else
7168 pent->plt.offset = (bfd_vma) -1;
7169 if (!doneone)
7170 {
7171 h->plt.plist = NULL;
7172 h->needs_plt = 0;
7173 }
7174 }
7175 else
7176 {
7177 h->plt.plist = NULL;
7178 h->needs_plt = 0;
7179 }
7180
7181 eh = (struct ppc_link_hash_entry *) h;
7182 /* Run through the TLS GD got entries first if we're changing them
7183 to TPREL. */
7184 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7185 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7186 if (gent->got.refcount > 0
7187 && (gent->tls_type & TLS_GD) != 0)
7188 {
7189 /* This was a GD entry that has been converted to TPREL. If
7190 there happens to be a TPREL entry we can use that one. */
7191 struct got_entry *ent;
7192 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7193 if (ent->got.refcount > 0
7194 && (ent->tls_type & TLS_TPREL) != 0
7195 && ent->addend == gent->addend
7196 && ent->owner == gent->owner)
7197 {
7198 gent->got.refcount = 0;
7199 break;
7200 }
7201
7202 /* If not, then we'll be using our own TPREL entry. */
7203 if (gent->got.refcount != 0)
7204 gent->tls_type = TLS_TLS | TLS_TPREL;
7205 }
7206
7207 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7208 if (gent->got.refcount > 0)
7209 {
7210 bfd_boolean dyn;
7211
7212 /* Make sure this symbol is output as a dynamic symbol.
7213 Undefined weak syms won't yet be marked as dynamic,
7214 nor will all TLS symbols. */
7215 if (h->dynindx == -1
7216 && !h->forced_local)
7217 {
7218 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7219 return FALSE;
7220 }
7221
7222 if ((gent->tls_type & TLS_LD) != 0
7223 && !h->def_dynamic)
7224 {
7225 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7226 continue;
7227 }
7228
7229 s = ppc64_elf_tdata (gent->owner)->got;
7230 gent->got.offset = s->size;
7231 s->size
7232 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7233 dyn = htab->elf.dynamic_sections_created;
7234 if ((info->shared
7235 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7236 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7237 || h->root.type != bfd_link_hash_undefweak))
7238 ppc64_elf_tdata (gent->owner)->relgot->size
7239 += (gent->tls_type & eh->tls_mask & TLS_GD
7240 ? 2 * sizeof (Elf64_External_Rela)
7241 : sizeof (Elf64_External_Rela));
7242 }
7243 else
7244 gent->got.offset = (bfd_vma) -1;
7245
7246 if (eh->dyn_relocs == NULL)
7247 return TRUE;
7248
7249 /* In the shared -Bsymbolic case, discard space allocated for
7250 dynamic pc-relative relocs against symbols which turn out to be
7251 defined in regular objects. For the normal shared case, discard
7252 space for relocs that have become local due to symbol visibility
7253 changes. */
7254
7255 if (info->shared)
7256 {
7257 /* Relocs that use pc_count are those that appear on a call insn,
7258 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7259 generated via assembly. We want calls to protected symbols to
7260 resolve directly to the function rather than going via the plt.
7261 If people want function pointer comparisons to work as expected
7262 then they should avoid writing weird assembly. */
7263 if (SYMBOL_CALLS_LOCAL (info, h))
7264 {
7265 struct ppc_dyn_relocs **pp;
7266
7267 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7268 {
7269 p->count -= p->pc_count;
7270 p->pc_count = 0;
7271 if (p->count == 0)
7272 *pp = p->next;
7273 else
7274 pp = &p->next;
7275 }
7276 }
7277
7278 /* Also discard relocs on undefined weak syms with non-default
7279 visibility. */
7280 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7281 && h->root.type == bfd_link_hash_undefweak)
7282 eh->dyn_relocs = NULL;
7283 }
7284 else if (ELIMINATE_COPY_RELOCS)
7285 {
7286 /* For the non-shared case, discard space for relocs against
7287 symbols which turn out to need copy relocs or are not
7288 dynamic. */
7289
7290 if (!h->non_got_ref
7291 && h->def_dynamic
7292 && !h->def_regular)
7293 {
7294 /* Make sure this symbol is output as a dynamic symbol.
7295 Undefined weak syms won't yet be marked as dynamic. */
7296 if (h->dynindx == -1
7297 && !h->forced_local)
7298 {
7299 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7300 return FALSE;
7301 }
7302
7303 /* If that succeeded, we know we'll be keeping all the
7304 relocs. */
7305 if (h->dynindx != -1)
7306 goto keep;
7307 }
7308
7309 eh->dyn_relocs = NULL;
7310
7311 keep: ;
7312 }
7313
7314 /* Finally, allocate space. */
7315 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7316 {
7317 asection *sreloc = elf_section_data (p->sec)->sreloc;
7318 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7319 }
7320
7321 return TRUE;
7322 }
7323
7324 /* Find any dynamic relocs that apply to read-only sections. */
7325
7326 static bfd_boolean
7327 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7328 {
7329 struct ppc_link_hash_entry *eh;
7330 struct ppc_dyn_relocs *p;
7331
7332 if (h->root.type == bfd_link_hash_warning)
7333 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7334
7335 eh = (struct ppc_link_hash_entry *) h;
7336 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7337 {
7338 asection *s = p->sec->output_section;
7339
7340 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7341 {
7342 struct bfd_link_info *info = inf;
7343
7344 info->flags |= DF_TEXTREL;
7345
7346 /* Not an error, just cut short the traversal. */
7347 return FALSE;
7348 }
7349 }
7350 return TRUE;
7351 }
7352
7353 /* Set the sizes of the dynamic sections. */
7354
7355 static bfd_boolean
7356 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7357 struct bfd_link_info *info)
7358 {
7359 struct ppc_link_hash_table *htab;
7360 bfd *dynobj;
7361 asection *s;
7362 bfd_boolean relocs;
7363 bfd *ibfd;
7364
7365 htab = ppc_hash_table (info);
7366 dynobj = htab->elf.dynobj;
7367 if (dynobj == NULL)
7368 abort ();
7369
7370 if (htab->elf.dynamic_sections_created)
7371 {
7372 /* Set the contents of the .interp section to the interpreter. */
7373 if (info->executable)
7374 {
7375 s = bfd_get_section_by_name (dynobj, ".interp");
7376 if (s == NULL)
7377 abort ();
7378 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7379 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7380 }
7381 }
7382
7383 /* Set up .got offsets for local syms, and space for local dynamic
7384 relocs. */
7385 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7386 {
7387 struct got_entry **lgot_ents;
7388 struct got_entry **end_lgot_ents;
7389 char *lgot_masks;
7390 bfd_size_type locsymcount;
7391 Elf_Internal_Shdr *symtab_hdr;
7392 asection *srel;
7393
7394 if (!is_ppc64_elf_target (ibfd->xvec))
7395 continue;
7396
7397 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7398 {
7399 s = ppc64_elf_tdata (ibfd)->got;
7400 ppc64_tlsld_got (ibfd)->offset = s->size;
7401 s->size += 16;
7402 if (info->shared)
7403 {
7404 srel = ppc64_elf_tdata (ibfd)->relgot;
7405 srel->size += sizeof (Elf64_External_Rela);
7406 }
7407 }
7408 else
7409 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7410
7411 for (s = ibfd->sections; s != NULL; s = s->next)
7412 {
7413 struct ppc_dyn_relocs *p;
7414
7415 for (p = *((struct ppc_dyn_relocs **)
7416 &elf_section_data (s)->local_dynrel);
7417 p != NULL;
7418 p = p->next)
7419 {
7420 if (!bfd_is_abs_section (p->sec)
7421 && bfd_is_abs_section (p->sec->output_section))
7422 {
7423 /* Input section has been discarded, either because
7424 it is a copy of a linkonce section or due to
7425 linker script /DISCARD/, so we'll be discarding
7426 the relocs too. */
7427 }
7428 else if (p->count != 0)
7429 {
7430 srel = elf_section_data (p->sec)->sreloc;
7431 srel->size += p->count * sizeof (Elf64_External_Rela);
7432 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7433 info->flags |= DF_TEXTREL;
7434 }
7435 }
7436 }
7437
7438 lgot_ents = elf_local_got_ents (ibfd);
7439 if (!lgot_ents)
7440 continue;
7441
7442 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7443 locsymcount = symtab_hdr->sh_info;
7444 end_lgot_ents = lgot_ents + locsymcount;
7445 lgot_masks = (char *) end_lgot_ents;
7446 s = ppc64_elf_tdata (ibfd)->got;
7447 srel = ppc64_elf_tdata (ibfd)->relgot;
7448 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7449 {
7450 struct got_entry *ent;
7451
7452 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7453 if (ent->got.refcount > 0)
7454 {
7455 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7456 {
7457 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7458 {
7459 ppc64_tlsld_got (ibfd)->offset = s->size;
7460 s->size += 16;
7461 if (info->shared)
7462 srel->size += sizeof (Elf64_External_Rela);
7463 }
7464 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7465 }
7466 else
7467 {
7468 ent->got.offset = s->size;
7469 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7470 {
7471 s->size += 16;
7472 if (info->shared)
7473 srel->size += 2 * sizeof (Elf64_External_Rela);
7474 }
7475 else
7476 {
7477 s->size += 8;
7478 if (info->shared)
7479 srel->size += sizeof (Elf64_External_Rela);
7480 }
7481 }
7482 }
7483 else
7484 ent->got.offset = (bfd_vma) -1;
7485 }
7486 }
7487
7488 /* Allocate global sym .plt and .got entries, and space for global
7489 sym dynamic relocs. */
7490 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7491
7492 /* We now have determined the sizes of the various dynamic sections.
7493 Allocate memory for them. */
7494 relocs = FALSE;
7495 for (s = dynobj->sections; s != NULL; s = s->next)
7496 {
7497 if ((s->flags & SEC_LINKER_CREATED) == 0)
7498 continue;
7499
7500 if (s == htab->brlt || s == htab->relbrlt)
7501 /* These haven't been allocated yet; don't strip. */
7502 continue;
7503 else if (s == htab->got
7504 || s == htab->plt
7505 || s == htab->glink)
7506 {
7507 /* Strip this section if we don't need it; see the
7508 comment below. */
7509 }
7510 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7511 {
7512 if (s->size == 0)
7513 {
7514 /* If we don't need this section, strip it from the
7515 output file. This is mostly to handle .rela.bss and
7516 .rela.plt. We must create both sections in
7517 create_dynamic_sections, because they must be created
7518 before the linker maps input sections to output
7519 sections. The linker does that before
7520 adjust_dynamic_symbol is called, and it is that
7521 function which decides whether anything needs to go
7522 into these sections. */
7523 }
7524 else
7525 {
7526 if (s != htab->relplt)
7527 relocs = TRUE;
7528
7529 /* We use the reloc_count field as a counter if we need
7530 to copy relocs into the output file. */
7531 s->reloc_count = 0;
7532 }
7533 }
7534 else
7535 {
7536 /* It's not one of our sections, so don't allocate space. */
7537 continue;
7538 }
7539
7540 if (s->size == 0)
7541 {
7542 _bfd_strip_section_from_output (info, s);
7543 continue;
7544 }
7545
7546 /* .plt is in the bss section. We don't initialise it. */
7547 if (s == htab->plt)
7548 continue;
7549
7550 /* Allocate memory for the section contents. We use bfd_zalloc
7551 here in case unused entries are not reclaimed before the
7552 section's contents are written out. This should not happen,
7553 but this way if it does we get a R_PPC64_NONE reloc in .rela
7554 sections instead of garbage.
7555 We also rely on the section contents being zero when writing
7556 the GOT. */
7557 s->contents = bfd_zalloc (dynobj, s->size);
7558 if (s->contents == NULL)
7559 return FALSE;
7560 }
7561
7562 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7563 {
7564 if (!is_ppc64_elf_target (ibfd->xvec))
7565 continue;
7566
7567 s = ppc64_elf_tdata (ibfd)->got;
7568 if (s != NULL && s != htab->got)
7569 {
7570 if (s->size == 0)
7571 _bfd_strip_section_from_output (info, s);
7572 else
7573 {
7574 s->contents = bfd_zalloc (ibfd, s->size);
7575 if (s->contents == NULL)
7576 return FALSE;
7577 }
7578 }
7579 s = ppc64_elf_tdata (ibfd)->relgot;
7580 if (s != NULL)
7581 {
7582 if (s->size == 0)
7583 _bfd_strip_section_from_output (info, s);
7584 else
7585 {
7586 s->contents = bfd_zalloc (ibfd, s->size);
7587 if (s->contents == NULL)
7588 return FALSE;
7589 relocs = TRUE;
7590 s->reloc_count = 0;
7591 }
7592 }
7593 }
7594
7595 if (htab->elf.dynamic_sections_created)
7596 {
7597 /* Add some entries to the .dynamic section. We fill in the
7598 values later, in ppc64_elf_finish_dynamic_sections, but we
7599 must add the entries now so that we get the correct size for
7600 the .dynamic section. The DT_DEBUG entry is filled in by the
7601 dynamic linker and used by the debugger. */
7602 #define add_dynamic_entry(TAG, VAL) \
7603 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7604
7605 if (info->executable)
7606 {
7607 if (!add_dynamic_entry (DT_DEBUG, 0))
7608 return FALSE;
7609 }
7610
7611 if (htab->plt != NULL && htab->plt->size != 0)
7612 {
7613 if (!add_dynamic_entry (DT_PLTGOT, 0)
7614 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7615 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7616 || !add_dynamic_entry (DT_JMPREL, 0)
7617 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7618 return FALSE;
7619 }
7620
7621 if (NO_OPD_RELOCS)
7622 {
7623 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7624 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7625 return FALSE;
7626 }
7627
7628 if (relocs)
7629 {
7630 if (!add_dynamic_entry (DT_RELA, 0)
7631 || !add_dynamic_entry (DT_RELASZ, 0)
7632 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7633 return FALSE;
7634
7635 /* If any dynamic relocs apply to a read-only section,
7636 then we need a DT_TEXTREL entry. */
7637 if ((info->flags & DF_TEXTREL) == 0)
7638 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7639
7640 if ((info->flags & DF_TEXTREL) != 0)
7641 {
7642 if (!add_dynamic_entry (DT_TEXTREL, 0))
7643 return FALSE;
7644 }
7645 }
7646 }
7647 #undef add_dynamic_entry
7648
7649 return TRUE;
7650 }
7651
7652 /* Determine the type of stub needed, if any, for a call. */
7653
7654 static inline enum ppc_stub_type
7655 ppc_type_of_stub (asection *input_sec,
7656 const Elf_Internal_Rela *rel,
7657 struct ppc_link_hash_entry **hash,
7658 bfd_vma destination)
7659 {
7660 struct ppc_link_hash_entry *h = *hash;
7661 bfd_vma location;
7662 bfd_vma branch_offset;
7663 bfd_vma max_branch_offset;
7664 enum elf_ppc64_reloc_type r_type;
7665
7666 if (h != NULL)
7667 {
7668 if (h->oh != NULL
7669 && h->oh->is_func_descriptor)
7670 h = h->oh;
7671
7672 if (h->elf.dynindx != -1)
7673 {
7674 struct plt_entry *ent;
7675
7676 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7677 if (ent->addend == rel->r_addend
7678 && ent->plt.offset != (bfd_vma) -1)
7679 {
7680 *hash = h;
7681 return ppc_stub_plt_call;
7682 }
7683 }
7684
7685 if (!(h->elf.root.type == bfd_link_hash_defined
7686 || h->elf.root.type == bfd_link_hash_defweak)
7687 || h->elf.root.u.def.section->output_section == NULL)
7688 return ppc_stub_none;
7689 }
7690
7691 /* Determine where the call point is. */
7692 location = (input_sec->output_offset
7693 + input_sec->output_section->vma
7694 + rel->r_offset);
7695
7696 branch_offset = destination - location;
7697 r_type = ELF64_R_TYPE (rel->r_info);
7698
7699 /* Determine if a long branch stub is needed. */
7700 max_branch_offset = 1 << 25;
7701 if (r_type != R_PPC64_REL24)
7702 max_branch_offset = 1 << 15;
7703
7704 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7705 /* We need a stub. Figure out whether a long_branch or plt_branch
7706 is needed later. */
7707 return ppc_stub_long_branch;
7708
7709 return ppc_stub_none;
7710 }
7711
7712 /* Build a .plt call stub. */
7713
7714 static inline bfd_byte *
7715 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7716 {
7717 #define PPC_LO(v) ((v) & 0xffff)
7718 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7719 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7720
7721 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7722 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7723 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7724 if (PPC_HA (offset + 8) != PPC_HA (offset))
7725 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7726 offset += 8;
7727 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7728 if (PPC_HA (offset + 8) != PPC_HA (offset))
7729 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7730 offset += 8;
7731 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7732 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7733 bfd_put_32 (obfd, BCTR, p), p += 4;
7734 return p;
7735 }
7736
7737 static bfd_boolean
7738 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7739 {
7740 struct ppc_stub_hash_entry *stub_entry;
7741 struct ppc_branch_hash_entry *br_entry;
7742 struct bfd_link_info *info;
7743 struct ppc_link_hash_table *htab;
7744 bfd_byte *loc;
7745 bfd_byte *p;
7746 unsigned int indx;
7747 struct plt_entry *ent;
7748 bfd_vma dest, off;
7749 int size;
7750
7751 /* Massage our args to the form they really have. */
7752 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7753 info = in_arg;
7754
7755 htab = ppc_hash_table (info);
7756
7757 /* Make a note of the offset within the stubs for this entry. */
7758 stub_entry->stub_offset = stub_entry->stub_sec->size;
7759 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7760
7761 htab->stub_count[stub_entry->stub_type - 1] += 1;
7762 switch (stub_entry->stub_type)
7763 {
7764 case ppc_stub_long_branch:
7765 case ppc_stub_long_branch_r2off:
7766 /* Branches are relative. This is where we are going to. */
7767 off = dest = (stub_entry->target_value
7768 + stub_entry->target_section->output_offset
7769 + stub_entry->target_section->output_section->vma);
7770
7771 /* And this is where we are coming from. */
7772 off -= (stub_entry->stub_offset
7773 + stub_entry->stub_sec->output_offset
7774 + stub_entry->stub_sec->output_section->vma);
7775
7776 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7777 size = 4;
7778 else
7779 {
7780 bfd_vma r2off;
7781
7782 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7783 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7784 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7785 loc += 4;
7786 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7787 loc += 4;
7788 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7789 loc += 4;
7790 off -= 12;
7791 size = 16;
7792 }
7793 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7794
7795 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7796
7797 if (info->emitrelocations)
7798 {
7799 Elf_Internal_Rela *relocs, *r;
7800 struct bfd_elf_section_data *elfsec_data;
7801
7802 elfsec_data = elf_section_data (stub_entry->stub_sec);
7803 relocs = elfsec_data->relocs;
7804 if (relocs == NULL)
7805 {
7806 bfd_size_type relsize;
7807 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7808 relocs = bfd_alloc (htab->stub_bfd, relsize);
7809 if (relocs == NULL)
7810 return FALSE;
7811 elfsec_data->relocs = relocs;
7812 elfsec_data->rel_hdr.sh_size = relsize;
7813 elfsec_data->rel_hdr.sh_entsize = 24;
7814 stub_entry->stub_sec->reloc_count = 0;
7815 }
7816 r = relocs + stub_entry->stub_sec->reloc_count;
7817 stub_entry->stub_sec->reloc_count += 1;
7818 r->r_offset = loc - stub_entry->stub_sec->contents;
7819 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7820 r->r_addend = dest;
7821 if (stub_entry->h != NULL)
7822 {
7823 struct elf_link_hash_entry **hashes;
7824 unsigned long symndx;
7825 struct ppc_link_hash_entry *h;
7826
7827 hashes = elf_sym_hashes (htab->stub_bfd);
7828 if (hashes == NULL)
7829 {
7830 bfd_size_type hsize;
7831
7832 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7833 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7834 if (hashes == NULL)
7835 return FALSE;
7836 elf_sym_hashes (htab->stub_bfd) = hashes;
7837 htab->stub_globals = 1;
7838 }
7839 symndx = htab->stub_globals++;
7840 h = stub_entry->h;
7841 hashes[symndx] = &h->elf;
7842 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7843 if (h->oh != NULL && h->oh->is_func)
7844 h = h->oh;
7845 if (h->elf.root.u.def.section != stub_entry->target_section)
7846 /* H is an opd symbol. The addend must be zero. */
7847 r->r_addend = 0;
7848 else
7849 {
7850 off = (h->elf.root.u.def.value
7851 + h->elf.root.u.def.section->output_offset
7852 + h->elf.root.u.def.section->output_section->vma);
7853 r->r_addend -= off;
7854 }
7855 }
7856 }
7857 break;
7858
7859 case ppc_stub_plt_branch:
7860 case ppc_stub_plt_branch_r2off:
7861 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7862 stub_entry->root.string + 9,
7863 FALSE, FALSE);
7864 if (br_entry == NULL)
7865 {
7866 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7867 stub_entry->root.string + 9);
7868 htab->stub_error = TRUE;
7869 return FALSE;
7870 }
7871
7872 off = (stub_entry->target_value
7873 + stub_entry->target_section->output_offset
7874 + stub_entry->target_section->output_section->vma);
7875
7876 bfd_put_64 (htab->brlt->owner, off,
7877 htab->brlt->contents + br_entry->offset);
7878
7879 if (htab->relbrlt != NULL)
7880 {
7881 /* Create a reloc for the branch lookup table entry. */
7882 Elf_Internal_Rela rela;
7883 bfd_byte *rl;
7884
7885 rela.r_offset = (br_entry->offset
7886 + htab->brlt->output_offset
7887 + htab->brlt->output_section->vma);
7888 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7889 rela.r_addend = off;
7890
7891 rl = htab->relbrlt->contents;
7892 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7893 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7894 }
7895
7896 off = (br_entry->offset
7897 + htab->brlt->output_offset
7898 + htab->brlt->output_section->vma
7899 - elf_gp (htab->brlt->output_section->owner)
7900 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7901
7902 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7903 {
7904 (*_bfd_error_handler)
7905 (_("linkage table error against `%s'"),
7906 stub_entry->root.string);
7907 bfd_set_error (bfd_error_bad_value);
7908 htab->stub_error = TRUE;
7909 return FALSE;
7910 }
7911
7912 indx = off;
7913 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7914 {
7915 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7916 loc += 4;
7917 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7918 size = 16;
7919 }
7920 else
7921 {
7922 bfd_vma r2off;
7923
7924 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7925 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7926 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7927 loc += 4;
7928 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7929 loc += 4;
7930 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7931 loc += 4;
7932 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7933 loc += 4;
7934 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7935 size = 28;
7936 }
7937 loc += 4;
7938 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7939 loc += 4;
7940 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7941 break;
7942
7943 case ppc_stub_plt_call:
7944 /* Do the best we can for shared libraries built without
7945 exporting ".foo" for each "foo". This can happen when symbol
7946 versioning scripts strip all bar a subset of symbols. */
7947 if (stub_entry->h->oh != NULL
7948 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7949 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7950 {
7951 /* Point the symbol at the stub. There may be multiple stubs,
7952 we don't really care; The main thing is to make this sym
7953 defined somewhere. Maybe defining the symbol in the stub
7954 section is a silly idea. If we didn't do this, htab->top_id
7955 could disappear. */
7956 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7957 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7958 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7959 }
7960
7961 /* Now build the stub. */
7962 off = (bfd_vma) -1;
7963 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7964 if (ent->addend == stub_entry->addend)
7965 {
7966 off = ent->plt.offset;
7967 break;
7968 }
7969 if (off >= (bfd_vma) -2)
7970 abort ();
7971
7972 off &= ~ (bfd_vma) 1;
7973 off += (htab->plt->output_offset
7974 + htab->plt->output_section->vma
7975 - elf_gp (htab->plt->output_section->owner)
7976 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7977
7978 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7979 {
7980 (*_bfd_error_handler)
7981 (_("linkage table error against `%s'"),
7982 stub_entry->h->elf.root.root.string);
7983 bfd_set_error (bfd_error_bad_value);
7984 htab->stub_error = TRUE;
7985 return FALSE;
7986 }
7987
7988 p = build_plt_stub (htab->stub_bfd, loc, off);
7989 size = p - loc;
7990 break;
7991
7992 default:
7993 BFD_FAIL ();
7994 return FALSE;
7995 }
7996
7997 stub_entry->stub_sec->size += size;
7998
7999 if (htab->emit_stub_syms)
8000 {
8001 struct elf_link_hash_entry *h;
8002 size_t len1, len2;
8003 char *name;
8004 const char *const stub_str[] = { "long_branch",
8005 "long_branch_r2off",
8006 "plt_branch",
8007 "plt_branch_r2off",
8008 "plt_call" };
8009
8010 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8011 len2 = strlen (stub_entry->root.string);
8012 name = bfd_malloc (len1 + len2 + 2);
8013 if (name == NULL)
8014 return FALSE;
8015 memcpy (name, stub_entry->root.string, 9);
8016 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8017 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8018 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8019 if (h == NULL)
8020 return FALSE;
8021 if (h->root.type == bfd_link_hash_new)
8022 {
8023 h->root.type = bfd_link_hash_defined;
8024 h->root.u.def.section = stub_entry->stub_sec;
8025 h->root.u.def.value = stub_entry->stub_offset;
8026 h->ref_regular = 1;
8027 h->def_regular = 1;
8028 h->ref_regular_nonweak = 1;
8029 h->forced_local = 1;
8030 h->non_elf = 0;
8031 }
8032 }
8033
8034 return TRUE;
8035 }
8036
8037 /* As above, but don't actually build the stub. Just bump offset so
8038 we know stub section sizes, and select plt_branch stubs where
8039 long_branch stubs won't do. */
8040
8041 static bfd_boolean
8042 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8043 {
8044 struct ppc_stub_hash_entry *stub_entry;
8045 struct bfd_link_info *info;
8046 struct ppc_link_hash_table *htab;
8047 bfd_vma off;
8048 int size;
8049
8050 /* Massage our args to the form they really have. */
8051 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8052 info = in_arg;
8053
8054 htab = ppc_hash_table (info);
8055
8056 if (stub_entry->stub_type == ppc_stub_plt_call)
8057 {
8058 struct plt_entry *ent;
8059 off = (bfd_vma) -1;
8060 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8061 if (ent->addend == stub_entry->addend)
8062 {
8063 off = ent->plt.offset & ~(bfd_vma) 1;
8064 break;
8065 }
8066 if (off >= (bfd_vma) -2)
8067 abort ();
8068 off += (htab->plt->output_offset
8069 + htab->plt->output_section->vma
8070 - elf_gp (htab->plt->output_section->owner)
8071 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8072
8073 size = PLT_CALL_STUB_SIZE;
8074 if (PPC_HA (off + 16) != PPC_HA (off))
8075 size += 4;
8076 }
8077 else
8078 {
8079 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8080 variants. */
8081 off = (stub_entry->target_value
8082 + stub_entry->target_section->output_offset
8083 + stub_entry->target_section->output_section->vma);
8084 off -= (stub_entry->stub_sec->size
8085 + stub_entry->stub_sec->output_offset
8086 + stub_entry->stub_sec->output_section->vma);
8087
8088 /* Reset the stub type from the plt variant in case we now
8089 can reach with a shorter stub. */
8090 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8091 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8092
8093 size = 4;
8094 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8095 {
8096 off -= 12;
8097 size = 16;
8098 }
8099
8100 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8101 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8102 {
8103 struct ppc_branch_hash_entry *br_entry;
8104
8105 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8106 stub_entry->root.string + 9,
8107 TRUE, FALSE);
8108 if (br_entry == NULL)
8109 {
8110 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8111 stub_entry->root.string + 9);
8112 htab->stub_error = TRUE;
8113 return FALSE;
8114 }
8115
8116 if (br_entry->iter != htab->stub_iteration)
8117 {
8118 br_entry->iter = htab->stub_iteration;
8119 br_entry->offset = htab->brlt->size;
8120 htab->brlt->size += 8;
8121
8122 if (htab->relbrlt != NULL)
8123 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8124 }
8125
8126 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8127 size = 16;
8128 if (stub_entry->stub_type != ppc_stub_plt_branch)
8129 size = 28;
8130 }
8131
8132 if (info->emitrelocations
8133 && (stub_entry->stub_type == ppc_stub_long_branch
8134 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8135 stub_entry->stub_sec->reloc_count += 1;
8136 }
8137
8138 stub_entry->stub_sec->size += size;
8139 return TRUE;
8140 }
8141
8142 /* Set up various things so that we can make a list of input sections
8143 for each output section included in the link. Returns -1 on error,
8144 0 when no stubs will be needed, and 1 on success. */
8145
8146 int
8147 ppc64_elf_setup_section_lists (bfd *output_bfd,
8148 struct bfd_link_info *info,
8149 int no_multi_toc)
8150 {
8151 bfd *input_bfd;
8152 int top_id, top_index, id;
8153 asection *section;
8154 asection **input_list;
8155 bfd_size_type amt;
8156 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8157
8158 htab->no_multi_toc = no_multi_toc;
8159
8160 if (htab->brlt == NULL)
8161 return 0;
8162
8163 /* Find the top input section id. */
8164 for (input_bfd = info->input_bfds, top_id = 3;
8165 input_bfd != NULL;
8166 input_bfd = input_bfd->link_next)
8167 {
8168 for (section = input_bfd->sections;
8169 section != NULL;
8170 section = section->next)
8171 {
8172 if (top_id < section->id)
8173 top_id = section->id;
8174 }
8175 }
8176
8177 htab->top_id = top_id;
8178 amt = sizeof (struct map_stub) * (top_id + 1);
8179 htab->stub_group = bfd_zmalloc (amt);
8180 if (htab->stub_group == NULL)
8181 return -1;
8182
8183 /* Set toc_off for com, und, abs and ind sections. */
8184 for (id = 0; id < 3; id++)
8185 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8186
8187 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8188
8189 /* We can't use output_bfd->section_count here to find the top output
8190 section index as some sections may have been removed, and
8191 _bfd_strip_section_from_output doesn't renumber the indices. */
8192 for (section = output_bfd->sections, top_index = 0;
8193 section != NULL;
8194 section = section->next)
8195 {
8196 if (top_index < section->index)
8197 top_index = section->index;
8198 }
8199
8200 htab->top_index = top_index;
8201 amt = sizeof (asection *) * (top_index + 1);
8202 input_list = bfd_zmalloc (amt);
8203 htab->input_list = input_list;
8204 if (input_list == NULL)
8205 return -1;
8206
8207 return 1;
8208 }
8209
8210 /* The linker repeatedly calls this function for each TOC input section
8211 and linker generated GOT section. Group input bfds such that the toc
8212 within a group is less than 64k in size. Will break with cute linker
8213 scripts that play games with dot in the output toc section. */
8214
8215 void
8216 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8217 {
8218 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8219
8220 if (!htab->no_multi_toc)
8221 {
8222 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8223 bfd_vma off = addr - htab->toc_curr;
8224
8225 if (off + isec->size > 0x10000)
8226 htab->toc_curr = addr;
8227
8228 elf_gp (isec->owner) = (htab->toc_curr
8229 - elf_gp (isec->output_section->owner)
8230 + TOC_BASE_OFF);
8231 }
8232 }
8233
8234 /* Called after the last call to the above function. */
8235
8236 void
8237 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8238 {
8239 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8240
8241 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8242
8243 /* toc_curr tracks the TOC offset used for code sections below in
8244 ppc64_elf_next_input_section. Start off at 0x8000. */
8245 htab->toc_curr = TOC_BASE_OFF;
8246 }
8247
8248 /* No toc references were found in ISEC. If the code in ISEC makes no
8249 calls, then there's no need to use toc adjusting stubs when branching
8250 into ISEC. Actually, indirect calls from ISEC are OK as they will
8251 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8252 needed, and 2 if a cyclical call-graph was found but no other reason
8253 for a stub was detected. If called from the top level, a return of
8254 2 means the same as a return of 0. */
8255
8256 static int
8257 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8258 {
8259 Elf_Internal_Rela *relstart, *rel;
8260 Elf_Internal_Sym *local_syms;
8261 int ret;
8262 struct ppc_link_hash_table *htab;
8263
8264 /* We know none of our code bearing sections will need toc stubs. */
8265 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8266 return 0;
8267
8268 if (isec->size == 0)
8269 return 0;
8270
8271 if (isec->output_section == NULL)
8272 return 0;
8273
8274 /* Hack for linux kernel. .fixup contains branches, but only back to
8275 the function that hit an exception. */
8276 if (strcmp (isec->name, ".fixup") == 0)
8277 return 0;
8278
8279 if (isec->reloc_count == 0)
8280 return 0;
8281
8282 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8283 info->keep_memory);
8284 if (relstart == NULL)
8285 return -1;
8286
8287 /* Look for branches to outside of this section. */
8288 local_syms = NULL;
8289 ret = 0;
8290 htab = ppc_hash_table (info);
8291 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8292 {
8293 enum elf_ppc64_reloc_type r_type;
8294 unsigned long r_symndx;
8295 struct elf_link_hash_entry *h;
8296 Elf_Internal_Sym *sym;
8297 asection *sym_sec;
8298 long *opd_adjust;
8299 bfd_vma sym_value;
8300 bfd_vma dest;
8301
8302 r_type = ELF64_R_TYPE (rel->r_info);
8303 if (r_type != R_PPC64_REL24
8304 && r_type != R_PPC64_REL14
8305 && r_type != R_PPC64_REL14_BRTAKEN
8306 && r_type != R_PPC64_REL14_BRNTAKEN)
8307 continue;
8308
8309 r_symndx = ELF64_R_SYM (rel->r_info);
8310 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8311 isec->owner))
8312 {
8313 ret = -1;
8314 break;
8315 }
8316
8317 /* Ignore branches to undefined syms. */
8318 if (sym_sec == NULL)
8319 continue;
8320
8321 /* Calls to dynamic lib functions go through a plt call stub
8322 that uses r2. Assume branches to other sections not included
8323 in the link need stubs too, to cover -R and absolute syms. */
8324 if (sym_sec->output_section == NULL)
8325 {
8326 ret = 1;
8327 break;
8328 }
8329
8330 if (h == NULL)
8331 sym_value = sym->st_value;
8332 else
8333 {
8334 if (h->root.type != bfd_link_hash_defined
8335 && h->root.type != bfd_link_hash_defweak)
8336 abort ();
8337 sym_value = h->root.u.def.value;
8338 }
8339 sym_value += rel->r_addend;
8340
8341 /* If this branch reloc uses an opd sym, find the code section. */
8342 opd_adjust = get_opd_info (sym_sec);
8343 if (opd_adjust != NULL)
8344 {
8345
8346 if (h == NULL)
8347 {
8348 long adjust;
8349
8350 adjust = opd_adjust[sym->st_value / 8];
8351 if (adjust == -1)
8352 /* Assume deleted functions won't ever be called. */
8353 continue;
8354 sym_value += adjust;
8355 }
8356
8357 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8358 if (dest == (bfd_vma) -1)
8359 continue;
8360 }
8361 else
8362 dest = (sym_value
8363 + sym_sec->output_offset
8364 + sym_sec->output_section->vma);
8365
8366 /* Ignore branch to self. */
8367 if (sym_sec == isec)
8368 continue;
8369
8370 /* If the called function uses the toc, we need a stub. */
8371 if (sym_sec->has_toc_reloc
8372 || sym_sec->makes_toc_func_call)
8373 {
8374 ret = 1;
8375 break;
8376 }
8377
8378 /* Assume any branch that needs a long branch stub might in fact
8379 need a plt_branch stub. A plt_branch stub uses r2. */
8380 else if (dest - (isec->output_offset
8381 + isec->output_section->vma
8382 + rel->r_offset) + (1 << 25) >= (2 << 25))
8383 {
8384 ret = 1;
8385 break;
8386 }
8387
8388 /* If calling back to a section in the process of being tested, we
8389 can't say for sure that no toc adjusting stubs are needed, so
8390 don't return zero. */
8391 else if (sym_sec->call_check_in_progress)
8392 ret = 2;
8393
8394 /* Branches to another section that itself doesn't have any TOC
8395 references are OK. Recursively call ourselves to check. */
8396 else if (sym_sec->id <= htab->top_id
8397 && htab->stub_group[sym_sec->id].toc_off == 0)
8398 {
8399 int recur;
8400
8401 /* Mark current section as indeterminate, so that other
8402 sections that call back to current won't be marked as
8403 known. */
8404 isec->call_check_in_progress = 1;
8405 recur = toc_adjusting_stub_needed (info, sym_sec);
8406 isec->call_check_in_progress = 0;
8407
8408 if (recur < 0)
8409 {
8410 /* An error. Exit. */
8411 ret = -1;
8412 break;
8413 }
8414 else if (recur <= 1)
8415 {
8416 /* Known result. Mark as checked and set section flag. */
8417 htab->stub_group[sym_sec->id].toc_off = 1;
8418 if (recur != 0)
8419 {
8420 sym_sec->makes_toc_func_call = 1;
8421 ret = 1;
8422 break;
8423 }
8424 }
8425 else
8426 {
8427 /* Unknown result. Continue checking. */
8428 ret = 2;
8429 }
8430 }
8431 }
8432
8433 if (local_syms != NULL
8434 && (elf_tdata (isec->owner)->symtab_hdr.contents
8435 != (unsigned char *) local_syms))
8436 free (local_syms);
8437 if (elf_section_data (isec)->relocs != relstart)
8438 free (relstart);
8439
8440 return ret;
8441 }
8442
8443 /* The linker repeatedly calls this function for each input section,
8444 in the order that input sections are linked into output sections.
8445 Build lists of input sections to determine groupings between which
8446 we may insert linker stubs. */
8447
8448 bfd_boolean
8449 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8450 {
8451 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8452
8453 if ((isec->output_section->flags & SEC_CODE) != 0
8454 && isec->output_section->index <= htab->top_index)
8455 {
8456 asection **list = htab->input_list + isec->output_section->index;
8457 /* Steal the link_sec pointer for our list. */
8458 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8459 /* This happens to make the list in reverse order,
8460 which is what we want. */
8461 PREV_SEC (isec) = *list;
8462 *list = isec;
8463 }
8464
8465 if (htab->multi_toc_needed)
8466 {
8467 /* If a code section has a function that uses the TOC then we need
8468 to use the right TOC (obviously). Also, make sure that .opd gets
8469 the correct TOC value for R_PPC64_TOC relocs that don't have or
8470 can't find their function symbol (shouldn't ever happen now). */
8471 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8472 {
8473 if (elf_gp (isec->owner) != 0)
8474 htab->toc_curr = elf_gp (isec->owner);
8475 }
8476 else if (htab->stub_group[isec->id].toc_off == 0)
8477 {
8478 int ret = toc_adjusting_stub_needed (info, isec);
8479 if (ret < 0)
8480 return FALSE;
8481 else
8482 isec->makes_toc_func_call = ret & 1;
8483 }
8484 }
8485
8486 /* Functions that don't use the TOC can belong in any TOC group.
8487 Use the last TOC base. This happens to make _init and _fini
8488 pasting work. */
8489 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8490 return TRUE;
8491 }
8492
8493 /* See whether we can group stub sections together. Grouping stub
8494 sections may result in fewer stubs. More importantly, we need to
8495 put all .init* and .fini* stubs at the beginning of the .init or
8496 .fini output sections respectively, because glibc splits the
8497 _init and _fini functions into multiple parts. Putting a stub in
8498 the middle of a function is not a good idea. */
8499
8500 static void
8501 group_sections (struct ppc_link_hash_table *htab,
8502 bfd_size_type stub_group_size,
8503 bfd_boolean stubs_always_before_branch)
8504 {
8505 asection **list = htab->input_list + htab->top_index;
8506 do
8507 {
8508 asection *tail = *list;
8509 while (tail != NULL)
8510 {
8511 asection *curr;
8512 asection *prev;
8513 bfd_size_type total;
8514 bfd_boolean big_sec;
8515 bfd_vma curr_toc;
8516
8517 curr = tail;
8518 total = tail->size;
8519 big_sec = total >= stub_group_size;
8520 curr_toc = htab->stub_group[tail->id].toc_off;
8521
8522 while ((prev = PREV_SEC (curr)) != NULL
8523 && ((total += curr->output_offset - prev->output_offset)
8524 < stub_group_size)
8525 && htab->stub_group[prev->id].toc_off == curr_toc)
8526 curr = prev;
8527
8528 /* OK, the size from the start of CURR to the end is less
8529 than stub_group_size and thus can be handled by one stub
8530 section. (or the tail section is itself larger than
8531 stub_group_size, in which case we may be toast.) We
8532 should really be keeping track of the total size of stubs
8533 added here, as stubs contribute to the final output
8534 section size. That's a little tricky, and this way will
8535 only break if stubs added make the total size more than
8536 2^25, ie. for the default stub_group_size, if stubs total
8537 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8538 do
8539 {
8540 prev = PREV_SEC (tail);
8541 /* Set up this stub group. */
8542 htab->stub_group[tail->id].link_sec = curr;
8543 }
8544 while (tail != curr && (tail = prev) != NULL);
8545
8546 /* But wait, there's more! Input sections up to stub_group_size
8547 bytes before the stub section can be handled by it too.
8548 Don't do this if we have a really large section after the
8549 stubs, as adding more stubs increases the chance that
8550 branches may not reach into the stub section. */
8551 if (!stubs_always_before_branch && !big_sec)
8552 {
8553 total = 0;
8554 while (prev != NULL
8555 && ((total += tail->output_offset - prev->output_offset)
8556 < stub_group_size)
8557 && htab->stub_group[prev->id].toc_off == curr_toc)
8558 {
8559 tail = prev;
8560 prev = PREV_SEC (tail);
8561 htab->stub_group[tail->id].link_sec = curr;
8562 }
8563 }
8564 tail = prev;
8565 }
8566 }
8567 while (list-- != htab->input_list);
8568 free (htab->input_list);
8569 #undef PREV_SEC
8570 }
8571
8572 /* Determine and set the size of the stub section for a final link.
8573
8574 The basic idea here is to examine all the relocations looking for
8575 PC-relative calls to a target that is unreachable with a "bl"
8576 instruction. */
8577
8578 bfd_boolean
8579 ppc64_elf_size_stubs (bfd *output_bfd,
8580 struct bfd_link_info *info,
8581 bfd_signed_vma group_size,
8582 asection *(*add_stub_section) (const char *, asection *),
8583 void (*layout_sections_again) (void))
8584 {
8585 bfd_size_type stub_group_size;
8586 bfd_boolean stubs_always_before_branch;
8587 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8588
8589 /* Stash our params away. */
8590 htab->add_stub_section = add_stub_section;
8591 htab->layout_sections_again = layout_sections_again;
8592 stubs_always_before_branch = group_size < 0;
8593 if (group_size < 0)
8594 stub_group_size = -group_size;
8595 else
8596 stub_group_size = group_size;
8597 if (stub_group_size == 1)
8598 {
8599 /* Default values. */
8600 if (stubs_always_before_branch)
8601 {
8602 stub_group_size = 0x1e00000;
8603 if (htab->has_14bit_branch)
8604 stub_group_size = 0x7800;
8605 }
8606 else
8607 {
8608 stub_group_size = 0x1c00000;
8609 if (htab->has_14bit_branch)
8610 stub_group_size = 0x7000;
8611 }
8612 }
8613
8614 group_sections (htab, stub_group_size, stubs_always_before_branch);
8615
8616 while (1)
8617 {
8618 bfd *input_bfd;
8619 unsigned int bfd_indx;
8620 asection *stub_sec;
8621 bfd_boolean stub_changed;
8622
8623 htab->stub_iteration += 1;
8624 stub_changed = FALSE;
8625
8626 for (input_bfd = info->input_bfds, bfd_indx = 0;
8627 input_bfd != NULL;
8628 input_bfd = input_bfd->link_next, bfd_indx++)
8629 {
8630 Elf_Internal_Shdr *symtab_hdr;
8631 asection *section;
8632 Elf_Internal_Sym *local_syms = NULL;
8633
8634 /* We'll need the symbol table in a second. */
8635 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8636 if (symtab_hdr->sh_info == 0)
8637 continue;
8638
8639 /* Walk over each section attached to the input bfd. */
8640 for (section = input_bfd->sections;
8641 section != NULL;
8642 section = section->next)
8643 {
8644 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8645
8646 /* If there aren't any relocs, then there's nothing more
8647 to do. */
8648 if ((section->flags & SEC_RELOC) == 0
8649 || section->reloc_count == 0)
8650 continue;
8651
8652 /* If this section is a link-once section that will be
8653 discarded, then don't create any stubs. */
8654 if (section->output_section == NULL
8655 || section->output_section->owner != output_bfd)
8656 continue;
8657
8658 /* Get the relocs. */
8659 internal_relocs
8660 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8661 info->keep_memory);
8662 if (internal_relocs == NULL)
8663 goto error_ret_free_local;
8664
8665 /* Now examine each relocation. */
8666 irela = internal_relocs;
8667 irelaend = irela + section->reloc_count;
8668 for (; irela < irelaend; irela++)
8669 {
8670 enum elf_ppc64_reloc_type r_type;
8671 unsigned int r_indx;
8672 enum ppc_stub_type stub_type;
8673 struct ppc_stub_hash_entry *stub_entry;
8674 asection *sym_sec, *code_sec;
8675 bfd_vma sym_value;
8676 bfd_vma destination;
8677 bfd_boolean ok_dest;
8678 struct ppc_link_hash_entry *hash;
8679 struct ppc_link_hash_entry *fdh;
8680 struct elf_link_hash_entry *h;
8681 Elf_Internal_Sym *sym;
8682 char *stub_name;
8683 const asection *id_sec;
8684 long *opd_adjust;
8685
8686 r_type = ELF64_R_TYPE (irela->r_info);
8687 r_indx = ELF64_R_SYM (irela->r_info);
8688
8689 if (r_type >= R_PPC64_max)
8690 {
8691 bfd_set_error (bfd_error_bad_value);
8692 goto error_ret_free_internal;
8693 }
8694
8695 /* Only look for stubs on branch instructions. */
8696 if (r_type != R_PPC64_REL24
8697 && r_type != R_PPC64_REL14
8698 && r_type != R_PPC64_REL14_BRTAKEN
8699 && r_type != R_PPC64_REL14_BRNTAKEN)
8700 continue;
8701
8702 /* Now determine the call target, its name, value,
8703 section. */
8704 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8705 r_indx, input_bfd))
8706 goto error_ret_free_internal;
8707 hash = (struct ppc_link_hash_entry *) h;
8708
8709 ok_dest = FALSE;
8710 fdh = NULL;
8711 if (hash == NULL)
8712 {
8713 sym_value = sym->st_value;
8714 ok_dest = TRUE;
8715 }
8716 else
8717 {
8718 sym_value = 0;
8719 /* Recognise an old ABI func code entry sym, and
8720 use the func descriptor sym instead. */
8721 if (hash->elf.root.type == bfd_link_hash_undefweak
8722 && hash->elf.root.root.string[0] == '.'
8723 && (fdh = get_fdh (hash, htab)) != NULL)
8724 {
8725 if (fdh->elf.root.type == bfd_link_hash_defined
8726 || fdh->elf.root.type == bfd_link_hash_defweak)
8727 {
8728 sym_sec = fdh->elf.root.u.def.section;
8729 sym_value = fdh->elf.root.u.def.value;
8730 if (sym_sec->output_section != NULL)
8731 ok_dest = TRUE;
8732 }
8733 else
8734 fdh = NULL;
8735 }
8736 else if (hash->elf.root.type == bfd_link_hash_defined
8737 || hash->elf.root.type == bfd_link_hash_defweak)
8738 {
8739 sym_value = hash->elf.root.u.def.value;
8740 if (sym_sec->output_section != NULL)
8741 ok_dest = TRUE;
8742 }
8743 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8744 ;
8745 else if (hash->elf.root.type == bfd_link_hash_undefined)
8746 ;
8747 else
8748 {
8749 bfd_set_error (bfd_error_bad_value);
8750 goto error_ret_free_internal;
8751 }
8752 }
8753
8754 destination = 0;
8755 if (ok_dest)
8756 {
8757 sym_value += irela->r_addend;
8758 destination = (sym_value
8759 + sym_sec->output_offset
8760 + sym_sec->output_section->vma);
8761 }
8762
8763 code_sec = sym_sec;
8764 opd_adjust = get_opd_info (sym_sec);
8765 if (opd_adjust != NULL)
8766 {
8767 bfd_vma dest;
8768
8769 if (hash == NULL)
8770 {
8771 long adjust = opd_adjust[sym_value / 8];
8772 if (adjust == -1)
8773 continue;
8774 sym_value += adjust;
8775 }
8776 dest = opd_entry_value (sym_sec, sym_value,
8777 &code_sec, &sym_value);
8778 if (dest != (bfd_vma) -1)
8779 {
8780 destination = dest;
8781 if (fdh != NULL)
8782 {
8783 /* Fixup old ABI sym to point at code
8784 entry. */
8785 hash->elf.root.type = bfd_link_hash_defweak;
8786 hash->elf.root.u.def.section = code_sec;
8787 hash->elf.root.u.def.value = sym_value;
8788 }
8789 }
8790 }
8791
8792 /* Determine what (if any) linker stub is needed. */
8793 stub_type = ppc_type_of_stub (section, irela, &hash,
8794 destination);
8795
8796 if (stub_type != ppc_stub_plt_call)
8797 {
8798 /* Check whether we need a TOC adjusting stub.
8799 Since the linker pastes together pieces from
8800 different object files when creating the
8801 _init and _fini functions, it may be that a
8802 call to what looks like a local sym is in
8803 fact a call needing a TOC adjustment. */
8804 if (code_sec != NULL
8805 && code_sec->output_section != NULL
8806 && (htab->stub_group[code_sec->id].toc_off
8807 != htab->stub_group[section->id].toc_off)
8808 && (code_sec->has_toc_reloc
8809 || code_sec->makes_toc_func_call))
8810 stub_type = ppc_stub_long_branch_r2off;
8811 }
8812
8813 if (stub_type == ppc_stub_none)
8814 continue;
8815
8816 /* __tls_get_addr calls might be eliminated. */
8817 if (stub_type != ppc_stub_plt_call
8818 && hash != NULL
8819 && (hash == htab->tls_get_addr
8820 || hash == htab->tls_get_addr_fd)
8821 && section->has_tls_reloc
8822 && irela != internal_relocs)
8823 {
8824 /* Get tls info. */
8825 char *tls_mask;
8826
8827 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8828 irela - 1, input_bfd))
8829 goto error_ret_free_internal;
8830 if (*tls_mask != 0)
8831 continue;
8832 }
8833
8834 /* Support for grouping stub sections. */
8835 id_sec = htab->stub_group[section->id].link_sec;
8836
8837 /* Get the name of this stub. */
8838 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8839 if (!stub_name)
8840 goto error_ret_free_internal;
8841
8842 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8843 stub_name, FALSE, FALSE);
8844 if (stub_entry != NULL)
8845 {
8846 /* The proper stub has already been created. */
8847 free (stub_name);
8848 continue;
8849 }
8850
8851 stub_entry = ppc_add_stub (stub_name, section, htab);
8852 if (stub_entry == NULL)
8853 {
8854 free (stub_name);
8855 error_ret_free_internal:
8856 if (elf_section_data (section)->relocs == NULL)
8857 free (internal_relocs);
8858 error_ret_free_local:
8859 if (local_syms != NULL
8860 && (symtab_hdr->contents
8861 != (unsigned char *) local_syms))
8862 free (local_syms);
8863 return FALSE;
8864 }
8865
8866 stub_entry->stub_type = stub_type;
8867 stub_entry->target_value = sym_value;
8868 stub_entry->target_section = code_sec;
8869 stub_entry->h = hash;
8870 stub_entry->addend = irela->r_addend;
8871
8872 if (stub_entry->h != NULL)
8873 htab->stub_globals += 1;
8874
8875 stub_changed = TRUE;
8876 }
8877
8878 /* We're done with the internal relocs, free them. */
8879 if (elf_section_data (section)->relocs != internal_relocs)
8880 free (internal_relocs);
8881 }
8882
8883 if (local_syms != NULL
8884 && symtab_hdr->contents != (unsigned char *) local_syms)
8885 {
8886 if (!info->keep_memory)
8887 free (local_syms);
8888 else
8889 symtab_hdr->contents = (unsigned char *) local_syms;
8890 }
8891 }
8892
8893 if (!stub_changed)
8894 break;
8895
8896 /* OK, we've added some stubs. Find out the new size of the
8897 stub sections. */
8898 for (stub_sec = htab->stub_bfd->sections;
8899 stub_sec != NULL;
8900 stub_sec = stub_sec->next)
8901 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8902 {
8903 stub_sec->size = 0;
8904 stub_sec->reloc_count = 0;
8905 }
8906
8907 htab->brlt->size = 0;
8908 if (htab->relbrlt != NULL)
8909 htab->relbrlt->size = 0;
8910
8911 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8912
8913 /* Ask the linker to do its stuff. */
8914 (*htab->layout_sections_again) ();
8915 }
8916
8917 /* It would be nice to strip .branch_lt from the output if the
8918 section is empty, but it's too late. If we strip sections here,
8919 the dynamic symbol table is corrupted since the section symbol
8920 for the stripped section isn't written. */
8921
8922 return TRUE;
8923 }
8924
8925 /* Called after we have determined section placement. If sections
8926 move, we'll be called again. Provide a value for TOCstart. */
8927
8928 bfd_vma
8929 ppc64_elf_toc (bfd *obfd)
8930 {
8931 asection *s;
8932 bfd_vma TOCstart;
8933
8934 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8935 order. The TOC starts where the first of these sections starts. */
8936 s = bfd_get_section_by_name (obfd, ".got");
8937 if (s == NULL)
8938 s = bfd_get_section_by_name (obfd, ".toc");
8939 if (s == NULL)
8940 s = bfd_get_section_by_name (obfd, ".tocbss");
8941 if (s == NULL)
8942 s = bfd_get_section_by_name (obfd, ".plt");
8943 if (s == NULL)
8944 {
8945 /* This may happen for
8946 o references to TOC base (SYM@toc / TOC[tc0]) without a
8947 .toc directive
8948 o bad linker script
8949 o --gc-sections and empty TOC sections
8950
8951 FIXME: Warn user? */
8952
8953 /* Look for a likely section. We probably won't even be
8954 using TOCstart. */
8955 for (s = obfd->sections; s != NULL; s = s->next)
8956 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8957 == (SEC_ALLOC | SEC_SMALL_DATA))
8958 break;
8959 if (s == NULL)
8960 for (s = obfd->sections; s != NULL; s = s->next)
8961 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8962 == (SEC_ALLOC | SEC_SMALL_DATA))
8963 break;
8964 if (s == NULL)
8965 for (s = obfd->sections; s != NULL; s = s->next)
8966 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8967 break;
8968 if (s == NULL)
8969 for (s = obfd->sections; s != NULL; s = s->next)
8970 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8971 break;
8972 }
8973
8974 TOCstart = 0;
8975 if (s != NULL)
8976 TOCstart = s->output_section->vma + s->output_offset;
8977
8978 return TOCstart;
8979 }
8980
8981 /* Build all the stubs associated with the current output file.
8982 The stubs are kept in a hash table attached to the main linker
8983 hash table. This function is called via gldelf64ppc_finish. */
8984
8985 bfd_boolean
8986 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8987 struct bfd_link_info *info,
8988 char **stats)
8989 {
8990 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8991 asection *stub_sec;
8992 bfd_byte *p;
8993 int stub_sec_count = 0;
8994
8995 htab->emit_stub_syms = emit_stub_syms;
8996
8997 /* Allocate memory to hold the linker stubs. */
8998 for (stub_sec = htab->stub_bfd->sections;
8999 stub_sec != NULL;
9000 stub_sec = stub_sec->next)
9001 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9002 && stub_sec->size != 0)
9003 {
9004 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9005 if (stub_sec->contents == NULL)
9006 return FALSE;
9007 /* We want to check that built size is the same as calculated
9008 size. rawsize is a convenient location to use. */
9009 stub_sec->rawsize = stub_sec->size;
9010 stub_sec->size = 0;
9011 }
9012
9013 if (htab->plt != NULL)
9014 {
9015 unsigned int indx;
9016 bfd_vma plt0;
9017
9018 /* Build the .glink plt call stub. */
9019 plt0 = (htab->plt->output_section->vma
9020 + htab->plt->output_offset
9021 - (htab->glink->output_section->vma
9022 + htab->glink->output_offset
9023 + GLINK_CALL_STUB_SIZE));
9024 if (plt0 + 0x80008000 > 0xffffffff)
9025 {
9026 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9027 bfd_set_error (bfd_error_bad_value);
9028 return FALSE;
9029 }
9030
9031 if (htab->emit_stub_syms)
9032 {
9033 struct elf_link_hash_entry *h;
9034 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9035 if (h == NULL)
9036 return FALSE;
9037 if (h->root.type == bfd_link_hash_new)
9038 {
9039 h->root.type = bfd_link_hash_defined;
9040 h->root.u.def.section = htab->glink;
9041 h->root.u.def.value = 0;
9042 h->ref_regular = 1;
9043 h->def_regular = 1;
9044 h->ref_regular_nonweak = 1;
9045 h->forced_local = 1;
9046 h->non_elf = 0;
9047 }
9048 }
9049 p = htab->glink->contents;
9050 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9051 p += 4;
9052 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9053 p += 4;
9054 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9055 p += 4;
9056 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9057 p += 4;
9058 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9059 p += 4;
9060 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9061 p += 4;
9062 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9063 p += 4;
9064 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9065 p += 4;
9066 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9067 p += 4;
9068 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9069 p += 4;
9070 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9071 p += 4;
9072 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9073 p += 4;
9074 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9075 p += 4;
9076 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9077 p += 4;
9078 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9079 p += 4;
9080 bfd_put_32 (htab->glink->owner, BCTR, p);
9081 p += 4;
9082
9083 /* Build the .glink lazy link call stubs. */
9084 indx = 0;
9085 while (p < htab->glink->contents + htab->glink->size)
9086 {
9087 if (indx < 0x8000)
9088 {
9089 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9090 p += 4;
9091 }
9092 else
9093 {
9094 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9095 p += 4;
9096 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9097 p += 4;
9098 }
9099 bfd_put_32 (htab->glink->owner,
9100 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9101 indx++;
9102 p += 4;
9103 }
9104 htab->glink->rawsize = p - htab->glink->contents;
9105 }
9106
9107 if (htab->brlt->size != 0)
9108 {
9109 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9110 htab->brlt->size);
9111 if (htab->brlt->contents == NULL)
9112 return FALSE;
9113 }
9114 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9115 {
9116 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9117 htab->relbrlt->size);
9118 if (htab->relbrlt->contents == NULL)
9119 return FALSE;
9120 }
9121
9122 /* Build the stubs as directed by the stub hash table. */
9123 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9124
9125 for (stub_sec = htab->stub_bfd->sections;
9126 stub_sec != NULL;
9127 stub_sec = stub_sec->next)
9128 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9129 {
9130 stub_sec_count += 1;
9131 if (stub_sec->rawsize != stub_sec->size)
9132 break;
9133 }
9134
9135 if (stub_sec != NULL
9136 || htab->glink->rawsize != htab->glink->size)
9137 {
9138 htab->stub_error = TRUE;
9139 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9140 }
9141
9142 if (htab->stub_error)
9143 return FALSE;
9144
9145 if (stats != NULL)
9146 {
9147 *stats = bfd_malloc (500);
9148 if (*stats == NULL)
9149 return FALSE;
9150
9151 sprintf (*stats, _("linker stubs in %u group%s\n"
9152 " branch %lu\n"
9153 " toc adjust %lu\n"
9154 " long branch %lu\n"
9155 " long toc adj %lu\n"
9156 " plt call %lu"),
9157 stub_sec_count,
9158 stub_sec_count == 1 ? "" : "s",
9159 htab->stub_count[ppc_stub_long_branch - 1],
9160 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9161 htab->stub_count[ppc_stub_plt_branch - 1],
9162 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9163 htab->stub_count[ppc_stub_plt_call - 1]);
9164 }
9165 return TRUE;
9166 }
9167
9168 /* This function undoes the changes made by add_symbol_adjust. */
9169
9170 static bfd_boolean
9171 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9172 {
9173 struct ppc_link_hash_entry *eh;
9174
9175 if (h->root.type == bfd_link_hash_indirect)
9176 return TRUE;
9177
9178 if (h->root.type == bfd_link_hash_warning)
9179 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9180
9181 eh = (struct ppc_link_hash_entry *) h;
9182 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9183 return TRUE;
9184
9185 eh->elf.root.type = bfd_link_hash_undefined;
9186 return TRUE;
9187 }
9188
9189 void
9190 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9191 {
9192 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9193 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9194 }
9195
9196 /* The RELOCATE_SECTION function is called by the ELF backend linker
9197 to handle the relocations for a section.
9198
9199 The relocs are always passed as Rela structures; if the section
9200 actually uses Rel structures, the r_addend field will always be
9201 zero.
9202
9203 This function is responsible for adjust the section contents as
9204 necessary, and (if using Rela relocs and generating a
9205 relocatable output file) adjusting the reloc addend as
9206 necessary.
9207
9208 This function does not have to worry about setting the reloc
9209 address or the reloc symbol index.
9210
9211 LOCAL_SYMS is a pointer to the swapped in local symbols.
9212
9213 LOCAL_SECTIONS is an array giving the section in the input file
9214 corresponding to the st_shndx field of each local symbol.
9215
9216 The global hash table entry for the global symbols can be found
9217 via elf_sym_hashes (input_bfd).
9218
9219 When generating relocatable output, this function must handle
9220 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9221 going to be the section symbol corresponding to the output
9222 section, which means that the addend must be adjusted
9223 accordingly. */
9224
9225 static bfd_boolean
9226 ppc64_elf_relocate_section (bfd *output_bfd,
9227 struct bfd_link_info *info,
9228 bfd *input_bfd,
9229 asection *input_section,
9230 bfd_byte *contents,
9231 Elf_Internal_Rela *relocs,
9232 Elf_Internal_Sym *local_syms,
9233 asection **local_sections)
9234 {
9235 struct ppc_link_hash_table *htab;
9236 Elf_Internal_Shdr *symtab_hdr;
9237 struct elf_link_hash_entry **sym_hashes;
9238 Elf_Internal_Rela *rel;
9239 Elf_Internal_Rela *relend;
9240 Elf_Internal_Rela outrel;
9241 bfd_byte *loc;
9242 struct got_entry **local_got_ents;
9243 bfd_vma TOCstart;
9244 bfd_boolean ret = TRUE;
9245 bfd_boolean is_opd;
9246 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9247 bfd_boolean is_power4 = FALSE;
9248
9249 if (info->relocatable)
9250 return TRUE;
9251
9252 /* Initialize howto table if needed. */
9253 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9254 ppc_howto_init ();
9255
9256 htab = ppc_hash_table (info);
9257
9258 /* Don't relocate stub sections. */
9259 if (input_section->owner == htab->stub_bfd)
9260 return TRUE;
9261
9262 local_got_ents = elf_local_got_ents (input_bfd);
9263 TOCstart = elf_gp (output_bfd);
9264 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9265 sym_hashes = elf_sym_hashes (input_bfd);
9266 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9267
9268 rel = relocs;
9269 relend = relocs + input_section->reloc_count;
9270 for (; rel < relend; rel++)
9271 {
9272 enum elf_ppc64_reloc_type r_type;
9273 bfd_vma addend;
9274 bfd_reloc_status_type r;
9275 Elf_Internal_Sym *sym;
9276 asection *sec;
9277 struct elf_link_hash_entry *h_elf;
9278 struct ppc_link_hash_entry *h;
9279 struct ppc_link_hash_entry *fdh;
9280 const char *sym_name;
9281 unsigned long r_symndx, toc_symndx;
9282 char tls_mask, tls_gd, tls_type;
9283 char sym_type;
9284 bfd_vma relocation;
9285 bfd_boolean unresolved_reloc;
9286 bfd_boolean warned;
9287 unsigned long insn, mask;
9288 struct ppc_stub_hash_entry *stub_entry;
9289 bfd_vma max_br_offset;
9290 bfd_vma from;
9291
9292 r_type = ELF64_R_TYPE (rel->r_info);
9293 r_symndx = ELF64_R_SYM (rel->r_info);
9294
9295 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9296 symbol of the previous ADDR64 reloc. The symbol gives us the
9297 proper TOC base to use. */
9298 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9299 && rel != relocs
9300 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9301 && is_opd)
9302 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9303
9304 sym = NULL;
9305 sec = NULL;
9306 h_elf = NULL;
9307 sym_name = NULL;
9308 unresolved_reloc = FALSE;
9309 warned = FALSE;
9310
9311 if (r_symndx < symtab_hdr->sh_info)
9312 {
9313 /* It's a local symbol. */
9314 long *opd_adjust;
9315
9316 sym = local_syms + r_symndx;
9317 sec = local_sections[r_symndx];
9318 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
9319 sym_type = ELF64_ST_TYPE (sym->st_info);
9320 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9321 opd_adjust = get_opd_info (sec);
9322 if (opd_adjust != NULL)
9323 {
9324 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9325 if (adjust == -1)
9326 relocation = 0;
9327 else
9328 relocation += adjust;
9329 }
9330 }
9331 else
9332 {
9333 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9334 r_symndx, symtab_hdr, sym_hashes,
9335 h_elf, sec, relocation,
9336 unresolved_reloc, warned);
9337 sym_name = h_elf->root.root.string;
9338 sym_type = h_elf->type;
9339 }
9340 h = (struct ppc_link_hash_entry *) h_elf;
9341
9342 /* TLS optimizations. Replace instruction sequences and relocs
9343 based on information we collected in tls_optimize. We edit
9344 RELOCS so that --emit-relocs will output something sensible
9345 for the final instruction stream. */
9346 tls_mask = 0;
9347 tls_gd = 0;
9348 toc_symndx = 0;
9349 if (IS_PPC64_TLS_RELOC (r_type))
9350 {
9351 if (h != NULL)
9352 tls_mask = h->tls_mask;
9353 else if (local_got_ents != NULL)
9354 {
9355 char *lgot_masks;
9356 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9357 tls_mask = lgot_masks[r_symndx];
9358 }
9359 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9360 {
9361 /* Check for toc tls entries. */
9362 char *toc_tls;
9363
9364 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9365 rel, input_bfd))
9366 return FALSE;
9367
9368 if (toc_tls)
9369 tls_mask = *toc_tls;
9370 }
9371 }
9372
9373 /* Check that tls relocs are used with tls syms, and non-tls
9374 relocs are used with non-tls syms. */
9375 if (r_symndx != 0
9376 && r_type != R_PPC64_NONE
9377 && (h == NULL
9378 || h->elf.root.type == bfd_link_hash_defined
9379 || h->elf.root.type == bfd_link_hash_defweak)
9380 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9381 {
9382 if (r_type == R_PPC64_TLS && tls_mask != 0)
9383 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9384 ;
9385 else
9386 (*_bfd_error_handler)
9387 (sym_type == STT_TLS
9388 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9389 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9390 input_bfd,
9391 input_section,
9392 (long) rel->r_offset,
9393 ppc64_elf_howto_table[r_type]->name,
9394 sym_name);
9395 }
9396
9397 /* Ensure reloc mapping code below stays sane. */
9398 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9399 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9400 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9401 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9402 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9403 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9404 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9405 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9406 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9407 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9408 abort ();
9409
9410 switch (r_type)
9411 {
9412 default:
9413 break;
9414
9415 case R_PPC64_TOC16:
9416 case R_PPC64_TOC16_LO:
9417 case R_PPC64_TOC16_DS:
9418 case R_PPC64_TOC16_LO_DS:
9419 {
9420 /* Check for toc tls entries. */
9421 char *toc_tls;
9422 int retval;
9423
9424 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9425 rel, input_bfd);
9426 if (retval == 0)
9427 return FALSE;
9428
9429 if (toc_tls)
9430 {
9431 tls_mask = *toc_tls;
9432 if (r_type == R_PPC64_TOC16_DS
9433 || r_type == R_PPC64_TOC16_LO_DS)
9434 {
9435 if (tls_mask != 0
9436 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9437 goto toctprel;
9438 }
9439 else
9440 {
9441 /* If we found a GD reloc pair, then we might be
9442 doing a GD->IE transition. */
9443 if (retval == 2)
9444 {
9445 tls_gd = TLS_TPRELGD;
9446 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9447 goto tls_get_addr_check;
9448 }
9449 else if (retval == 3)
9450 {
9451 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9452 goto tls_get_addr_check;
9453 }
9454 }
9455 }
9456 }
9457 break;
9458
9459 case R_PPC64_GOT_TPREL16_DS:
9460 case R_PPC64_GOT_TPREL16_LO_DS:
9461 if (tls_mask != 0
9462 && (tls_mask & TLS_TPREL) == 0)
9463 {
9464 toctprel:
9465 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9466 insn &= 31 << 21;
9467 insn |= 0x3c0d0000; /* addis 0,13,0 */
9468 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9469 r_type = R_PPC64_TPREL16_HA;
9470 if (toc_symndx != 0)
9471 {
9472 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9473 /* We changed the symbol. Start over in order to
9474 get h, sym, sec etc. right. */
9475 rel--;
9476 continue;
9477 }
9478 else
9479 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9480 }
9481 break;
9482
9483 case R_PPC64_TLS:
9484 if (tls_mask != 0
9485 && (tls_mask & TLS_TPREL) == 0)
9486 {
9487 bfd_vma rtra;
9488 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9489 if ((insn & ((0x3f << 26) | (31 << 11)))
9490 == ((31 << 26) | (13 << 11)))
9491 rtra = insn & ((1 << 26) - (1 << 16));
9492 else if ((insn & ((0x3f << 26) | (31 << 16)))
9493 == ((31 << 26) | (13 << 16)))
9494 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9495 else
9496 abort ();
9497 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9498 /* add -> addi. */
9499 insn = 14 << 26;
9500 else if ((insn & (31 << 1)) == 23 << 1
9501 && ((insn & (31 << 6)) < 14 << 6
9502 || ((insn & (31 << 6)) >= 16 << 6
9503 && (insn & (31 << 6)) < 24 << 6)))
9504 /* load and store indexed -> dform. */
9505 insn = (32 | ((insn >> 6) & 31)) << 26;
9506 else if ((insn & (31 << 1)) == 21 << 1
9507 && (insn & (0x1a << 6)) == 0)
9508 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9509 insn = (((58 | ((insn >> 6) & 4)) << 26)
9510 | ((insn >> 6) & 1));
9511 else if ((insn & (31 << 1)) == 21 << 1
9512 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9513 /* lwax -> lwa. */
9514 insn = (58 << 26) | 2;
9515 else
9516 abort ();
9517 insn |= rtra;
9518 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9519 /* Was PPC64_TLS which sits on insn boundary, now
9520 PPC64_TPREL16_LO which is at insn+2. */
9521 rel->r_offset += 2;
9522 r_type = R_PPC64_TPREL16_LO;
9523 if (toc_symndx != 0)
9524 {
9525 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9526 /* We changed the symbol. Start over in order to
9527 get h, sym, sec etc. right. */
9528 rel--;
9529 continue;
9530 }
9531 else
9532 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9533 }
9534 break;
9535
9536 case R_PPC64_GOT_TLSGD16_HI:
9537 case R_PPC64_GOT_TLSGD16_HA:
9538 tls_gd = TLS_TPRELGD;
9539 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9540 goto tls_gdld_hi;
9541 break;
9542
9543 case R_PPC64_GOT_TLSLD16_HI:
9544 case R_PPC64_GOT_TLSLD16_HA:
9545 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9546 {
9547 tls_gdld_hi:
9548 if ((tls_mask & tls_gd) != 0)
9549 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9550 + R_PPC64_GOT_TPREL16_DS);
9551 else
9552 {
9553 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9554 rel->r_offset -= 2;
9555 r_type = R_PPC64_NONE;
9556 }
9557 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9558 }
9559 break;
9560
9561 case R_PPC64_GOT_TLSGD16:
9562 case R_PPC64_GOT_TLSGD16_LO:
9563 tls_gd = TLS_TPRELGD;
9564 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9565 goto tls_get_addr_check;
9566 break;
9567
9568 case R_PPC64_GOT_TLSLD16:
9569 case R_PPC64_GOT_TLSLD16_LO:
9570 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9571 {
9572 tls_get_addr_check:
9573 if (rel + 1 < relend)
9574 {
9575 enum elf_ppc64_reloc_type r_type2;
9576 unsigned long r_symndx2;
9577 struct elf_link_hash_entry *h2;
9578 bfd_vma insn1, insn2, insn3;
9579 bfd_vma offset;
9580
9581 /* The next instruction should be a call to
9582 __tls_get_addr. Peek at the reloc to be sure. */
9583 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9584 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9585 if (r_symndx2 < symtab_hdr->sh_info
9586 || (r_type2 != R_PPC64_REL14
9587 && r_type2 != R_PPC64_REL14_BRTAKEN
9588 && r_type2 != R_PPC64_REL14_BRNTAKEN
9589 && r_type2 != R_PPC64_REL24))
9590 break;
9591
9592 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9593 while (h2->root.type == bfd_link_hash_indirect
9594 || h2->root.type == bfd_link_hash_warning)
9595 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9596 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9597 && h2 != &htab->tls_get_addr_fd->elf))
9598 break;
9599
9600 /* OK, it checks out. Replace the call. */
9601 offset = rel[1].r_offset;
9602 insn1 = bfd_get_32 (output_bfd,
9603 contents + rel->r_offset - 2);
9604 insn3 = bfd_get_32 (output_bfd,
9605 contents + offset + 4);
9606 if ((tls_mask & tls_gd) != 0)
9607 {
9608 /* IE */
9609 insn1 &= (1 << 26) - (1 << 2);
9610 insn1 |= 58 << 26; /* ld */
9611 insn2 = 0x7c636a14; /* add 3,3,13 */
9612 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9613 if ((tls_mask & TLS_EXPLICIT) == 0)
9614 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9615 + R_PPC64_GOT_TPREL16_DS);
9616 else
9617 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9618 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9619 }
9620 else
9621 {
9622 /* LE */
9623 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9624 insn2 = 0x38630000; /* addi 3,3,0 */
9625 if (tls_gd == 0)
9626 {
9627 /* Was an LD reloc. */
9628 r_symndx = 0;
9629 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9630 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9631 }
9632 else if (toc_symndx != 0)
9633 r_symndx = toc_symndx;
9634 r_type = R_PPC64_TPREL16_HA;
9635 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9636 rel[1].r_info = ELF64_R_INFO (r_symndx,
9637 R_PPC64_TPREL16_LO);
9638 rel[1].r_offset += 2;
9639 }
9640 if (insn3 == NOP
9641 || insn3 == CROR_151515 || insn3 == CROR_313131)
9642 {
9643 insn3 = insn2;
9644 insn2 = NOP;
9645 rel[1].r_offset += 4;
9646 }
9647 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9648 bfd_put_32 (output_bfd, insn2, contents + offset);
9649 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9650 if (tls_gd == 0 || toc_symndx != 0)
9651 {
9652 /* We changed the symbol. Start over in order
9653 to get h, sym, sec etc. right. */
9654 rel--;
9655 continue;
9656 }
9657 }
9658 }
9659 break;
9660
9661 case R_PPC64_DTPMOD64:
9662 if (rel + 1 < relend
9663 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9664 && rel[1].r_offset == rel->r_offset + 8)
9665 {
9666 if ((tls_mask & TLS_GD) == 0)
9667 {
9668 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9669 if ((tls_mask & TLS_TPRELGD) != 0)
9670 r_type = R_PPC64_TPREL64;
9671 else
9672 {
9673 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9674 r_type = R_PPC64_NONE;
9675 }
9676 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9677 }
9678 }
9679 else
9680 {
9681 if ((tls_mask & TLS_LD) == 0)
9682 {
9683 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9684 r_type = R_PPC64_NONE;
9685 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9686 }
9687 }
9688 break;
9689
9690 case R_PPC64_TPREL64:
9691 if ((tls_mask & TLS_TPREL) == 0)
9692 {
9693 r_type = R_PPC64_NONE;
9694 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9695 }
9696 break;
9697 }
9698
9699 /* Handle other relocations that tweak non-addend part of insn. */
9700 insn = 0;
9701 max_br_offset = 1 << 25;
9702 addend = rel->r_addend;
9703 switch (r_type)
9704 {
9705 default:
9706 break;
9707
9708 /* Branch taken prediction relocations. */
9709 case R_PPC64_ADDR14_BRTAKEN:
9710 case R_PPC64_REL14_BRTAKEN:
9711 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9712 /* Fall thru. */
9713
9714 /* Branch not taken prediction relocations. */
9715 case R_PPC64_ADDR14_BRNTAKEN:
9716 case R_PPC64_REL14_BRNTAKEN:
9717 insn |= bfd_get_32 (output_bfd,
9718 contents + rel->r_offset) & ~(0x01 << 21);
9719 /* Fall thru. */
9720
9721 case R_PPC64_REL14:
9722 max_br_offset = 1 << 15;
9723 /* Fall thru. */
9724
9725 case R_PPC64_REL24:
9726 /* Calls to functions with a different TOC, such as calls to
9727 shared objects, need to alter the TOC pointer. This is
9728 done using a linkage stub. A REL24 branching to these
9729 linkage stubs needs to be followed by a nop, as the nop
9730 will be replaced with an instruction to restore the TOC
9731 base pointer. */
9732 stub_entry = NULL;
9733 fdh = h;
9734 if (((h != NULL
9735 && (((fdh = h->oh) != NULL
9736 && fdh->elf.plt.plist != NULL)
9737 || (fdh = h)->elf.plt.plist != NULL))
9738 || (sec != NULL
9739 && sec->output_section != NULL
9740 && sec->id <= htab->top_id
9741 && (htab->stub_group[sec->id].toc_off
9742 != htab->stub_group[input_section->id].toc_off)))
9743 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9744 rel, htab)) != NULL
9745 && (stub_entry->stub_type == ppc_stub_plt_call
9746 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9747 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9748 {
9749 bfd_boolean can_plt_call = FALSE;
9750
9751 if (rel->r_offset + 8 <= input_section->size)
9752 {
9753 unsigned long nop;
9754 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9755 if (nop == NOP
9756 || nop == CROR_151515 || nop == CROR_313131)
9757 {
9758 bfd_put_32 (input_bfd, LD_R2_40R1,
9759 contents + rel->r_offset + 4);
9760 can_plt_call = TRUE;
9761 }
9762 }
9763
9764 if (!can_plt_call)
9765 {
9766 if (stub_entry->stub_type == ppc_stub_plt_call)
9767 {
9768 /* If this is a plain branch rather than a branch
9769 and link, don't require a nop. */
9770 unsigned long br;
9771 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9772 if ((br & 1) == 0)
9773 can_plt_call = TRUE;
9774 }
9775 else if (h != NULL
9776 && strcmp (h->elf.root.root.string,
9777 ".__libc_start_main") == 0)
9778 {
9779 /* Allow crt1 branch to go via a toc adjusting stub. */
9780 can_plt_call = TRUE;
9781 }
9782 else
9783 {
9784 if (strcmp (input_section->output_section->name,
9785 ".init") == 0
9786 || strcmp (input_section->output_section->name,
9787 ".fini") == 0)
9788 (*_bfd_error_handler)
9789 (_("%B(%A+0x%lx): automatic multiple TOCs "
9790 "not supported using your crt files; "
9791 "recompile with -mminimal-toc or upgrade gcc"),
9792 input_bfd,
9793 input_section,
9794 (long) rel->r_offset);
9795 else
9796 (*_bfd_error_handler)
9797 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9798 "does not allow automatic multiple TOCs; "
9799 "recompile with -mminimal-toc or "
9800 "-fno-optimize-sibling-calls, "
9801 "or make `%s' extern"),
9802 input_bfd,
9803 input_section,
9804 (long) rel->r_offset,
9805 sym_name,
9806 sym_name);
9807 bfd_set_error (bfd_error_bad_value);
9808 ret = FALSE;
9809 }
9810 }
9811
9812 if (can_plt_call
9813 && stub_entry->stub_type == ppc_stub_plt_call)
9814 unresolved_reloc = FALSE;
9815 }
9816
9817 if (stub_entry == NULL
9818 && get_opd_info (sec) != NULL)
9819 {
9820 /* The branch destination is the value of the opd entry. */
9821 bfd_vma off = (relocation - sec->output_section->vma
9822 - sec->output_offset + rel->r_addend);
9823 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9824 if (dest != (bfd_vma) -1)
9825 {
9826 relocation = dest;
9827 addend = 0;
9828 }
9829 }
9830
9831 /* If the branch is out of reach we ought to have a long
9832 branch stub. */
9833 from = (rel->r_offset
9834 + input_section->output_offset
9835 + input_section->output_section->vma);
9836
9837 if (stub_entry == NULL
9838 && (relocation + rel->r_addend - from + max_br_offset
9839 >= 2 * max_br_offset)
9840 && r_type != R_PPC64_ADDR14_BRTAKEN
9841 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9842 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9843 htab);
9844
9845 if (stub_entry != NULL)
9846 {
9847 /* Munge up the value and addend so that we call the stub
9848 rather than the procedure directly. */
9849 relocation = (stub_entry->stub_offset
9850 + stub_entry->stub_sec->output_offset
9851 + stub_entry->stub_sec->output_section->vma);
9852 addend = 0;
9853 }
9854
9855 if (insn != 0)
9856 {
9857 if (is_power4)
9858 {
9859 /* Set 'a' bit. This is 0b00010 in BO field for branch
9860 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9861 for branch on CTR insns (BO == 1a00t or 1a01t). */
9862 if ((insn & (0x14 << 21)) == (0x04 << 21))
9863 insn |= 0x02 << 21;
9864 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9865 insn |= 0x08 << 21;
9866 else
9867 break;
9868 }
9869 else
9870 {
9871 /* Invert 'y' bit if not the default. */
9872 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9873 insn ^= 0x01 << 21;
9874 }
9875
9876 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9877 }
9878
9879 /* NOP out calls to undefined weak functions.
9880 We can thus call a weak function without first
9881 checking whether the function is defined. */
9882 else if (h != NULL
9883 && h->elf.root.type == bfd_link_hash_undefweak
9884 && r_type == R_PPC64_REL24
9885 && relocation == 0
9886 && rel->r_addend == 0)
9887 {
9888 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9889 continue;
9890 }
9891 break;
9892 }
9893
9894 /* Set `addend'. */
9895 tls_type = 0;
9896 switch (r_type)
9897 {
9898 default:
9899 (*_bfd_error_handler)
9900 (_("%B: unknown relocation type %d for symbol %s"),
9901 input_bfd, (int) r_type, sym_name);
9902
9903 bfd_set_error (bfd_error_bad_value);
9904 ret = FALSE;
9905 continue;
9906
9907 case R_PPC64_NONE:
9908 case R_PPC64_TLS:
9909 case R_PPC64_GNU_VTINHERIT:
9910 case R_PPC64_GNU_VTENTRY:
9911 continue;
9912
9913 /* GOT16 relocations. Like an ADDR16 using the symbol's
9914 address in the GOT as relocation value instead of the
9915 symbol's value itself. Also, create a GOT entry for the
9916 symbol and put the symbol value there. */
9917 case R_PPC64_GOT_TLSGD16:
9918 case R_PPC64_GOT_TLSGD16_LO:
9919 case R_PPC64_GOT_TLSGD16_HI:
9920 case R_PPC64_GOT_TLSGD16_HA:
9921 tls_type = TLS_TLS | TLS_GD;
9922 goto dogot;
9923
9924 case R_PPC64_GOT_TLSLD16:
9925 case R_PPC64_GOT_TLSLD16_LO:
9926 case R_PPC64_GOT_TLSLD16_HI:
9927 case R_PPC64_GOT_TLSLD16_HA:
9928 tls_type = TLS_TLS | TLS_LD;
9929 goto dogot;
9930
9931 case R_PPC64_GOT_TPREL16_DS:
9932 case R_PPC64_GOT_TPREL16_LO_DS:
9933 case R_PPC64_GOT_TPREL16_HI:
9934 case R_PPC64_GOT_TPREL16_HA:
9935 tls_type = TLS_TLS | TLS_TPREL;
9936 goto dogot;
9937
9938 case R_PPC64_GOT_DTPREL16_DS:
9939 case R_PPC64_GOT_DTPREL16_LO_DS:
9940 case R_PPC64_GOT_DTPREL16_HI:
9941 case R_PPC64_GOT_DTPREL16_HA:
9942 tls_type = TLS_TLS | TLS_DTPREL;
9943 goto dogot;
9944
9945 case R_PPC64_GOT16:
9946 case R_PPC64_GOT16_LO:
9947 case R_PPC64_GOT16_HI:
9948 case R_PPC64_GOT16_HA:
9949 case R_PPC64_GOT16_DS:
9950 case R_PPC64_GOT16_LO_DS:
9951 dogot:
9952 {
9953 /* Relocation is to the entry for this symbol in the global
9954 offset table. */
9955 asection *got;
9956 bfd_vma *offp;
9957 bfd_vma off;
9958 unsigned long indx = 0;
9959
9960 if (tls_type == (TLS_TLS | TLS_LD)
9961 && (h == NULL
9962 || !h->elf.def_dynamic))
9963 offp = &ppc64_tlsld_got (input_bfd)->offset;
9964 else
9965 {
9966 struct got_entry *ent;
9967
9968 if (h != NULL)
9969 {
9970 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9971 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
9972 &h->elf)
9973 || (info->shared
9974 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
9975 /* This is actually a static link, or it is a
9976 -Bsymbolic link and the symbol is defined
9977 locally, or the symbol was forced to be local
9978 because of a version file. */
9979 ;
9980 else
9981 {
9982 indx = h->elf.dynindx;
9983 unresolved_reloc = FALSE;
9984 }
9985 ent = h->elf.got.glist;
9986 }
9987 else
9988 {
9989 if (local_got_ents == NULL)
9990 abort ();
9991 ent = local_got_ents[r_symndx];
9992 }
9993
9994 for (; ent != NULL; ent = ent->next)
9995 if (ent->addend == rel->r_addend
9996 && ent->owner == input_bfd
9997 && ent->tls_type == tls_type)
9998 break;
9999 if (ent == NULL)
10000 abort ();
10001 offp = &ent->got.offset;
10002 }
10003
10004 got = ppc64_elf_tdata (input_bfd)->got;
10005 if (got == NULL)
10006 abort ();
10007
10008 /* The offset must always be a multiple of 8. We use the
10009 least significant bit to record whether we have already
10010 processed this entry. */
10011 off = *offp;
10012 if ((off & 1) != 0)
10013 off &= ~1;
10014 else
10015 {
10016 /* Generate relocs for the dynamic linker, except in
10017 the case of TLSLD where we'll use one entry per
10018 module. */
10019 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10020
10021 *offp = off | 1;
10022 if ((info->shared || indx != 0)
10023 && (h == NULL
10024 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10025 || h->elf.root.type != bfd_link_hash_undefweak))
10026 {
10027 outrel.r_offset = (got->output_section->vma
10028 + got->output_offset
10029 + off);
10030 outrel.r_addend = rel->r_addend;
10031 if (tls_type & (TLS_LD | TLS_GD))
10032 {
10033 outrel.r_addend = 0;
10034 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10035 if (tls_type == (TLS_TLS | TLS_GD))
10036 {
10037 loc = relgot->contents;
10038 loc += (relgot->reloc_count++
10039 * sizeof (Elf64_External_Rela));
10040 bfd_elf64_swap_reloca_out (output_bfd,
10041 &outrel, loc);
10042 outrel.r_offset += 8;
10043 outrel.r_addend = rel->r_addend;
10044 outrel.r_info
10045 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10046 }
10047 }
10048 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10049 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10050 else if (tls_type == (TLS_TLS | TLS_TPREL))
10051 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10052 else if (indx == 0)
10053 {
10054 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10055
10056 /* Write the .got section contents for the sake
10057 of prelink. */
10058 loc = got->contents + off;
10059 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10060 loc);
10061 }
10062 else
10063 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10064
10065 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10066 {
10067 outrel.r_addend += relocation;
10068 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10069 outrel.r_addend -= htab->elf.tls_sec->vma;
10070 }
10071 loc = relgot->contents;
10072 loc += (relgot->reloc_count++
10073 * sizeof (Elf64_External_Rela));
10074 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10075 }
10076
10077 /* Init the .got section contents here if we're not
10078 emitting a reloc. */
10079 else
10080 {
10081 relocation += rel->r_addend;
10082 if (tls_type == (TLS_TLS | TLS_LD))
10083 relocation = 1;
10084 else if (tls_type != 0)
10085 {
10086 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10087 if (tls_type == (TLS_TLS | TLS_TPREL))
10088 relocation += DTP_OFFSET - TP_OFFSET;
10089
10090 if (tls_type == (TLS_TLS | TLS_GD))
10091 {
10092 bfd_put_64 (output_bfd, relocation,
10093 got->contents + off + 8);
10094 relocation = 1;
10095 }
10096 }
10097
10098 bfd_put_64 (output_bfd, relocation,
10099 got->contents + off);
10100 }
10101 }
10102
10103 if (off >= (bfd_vma) -2)
10104 abort ();
10105
10106 relocation = got->output_offset + off;
10107
10108 /* TOC base (r2) is TOC start plus 0x8000. */
10109 addend = -TOC_BASE_OFF;
10110 }
10111 break;
10112
10113 case R_PPC64_PLT16_HA:
10114 case R_PPC64_PLT16_HI:
10115 case R_PPC64_PLT16_LO:
10116 case R_PPC64_PLT32:
10117 case R_PPC64_PLT64:
10118 /* Relocation is to the entry for this symbol in the
10119 procedure linkage table. */
10120
10121 /* Resolve a PLT reloc against a local symbol directly,
10122 without using the procedure linkage table. */
10123 if (h == NULL)
10124 break;
10125
10126 /* It's possible that we didn't make a PLT entry for this
10127 symbol. This happens when statically linking PIC code,
10128 or when using -Bsymbolic. Go find a match if there is a
10129 PLT entry. */
10130 if (htab->plt != NULL)
10131 {
10132 struct plt_entry *ent;
10133 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10134 if (ent->addend == rel->r_addend
10135 && ent->plt.offset != (bfd_vma) -1)
10136 {
10137 relocation = (htab->plt->output_section->vma
10138 + htab->plt->output_offset
10139 + ent->plt.offset);
10140 unresolved_reloc = FALSE;
10141 }
10142 }
10143 break;
10144
10145 case R_PPC64_TOC:
10146 /* Relocation value is TOC base. */
10147 relocation = TOCstart;
10148 if (r_symndx == 0)
10149 relocation += htab->stub_group[input_section->id].toc_off;
10150 else if (unresolved_reloc)
10151 ;
10152 else if (sec != NULL && sec->id <= htab->top_id)
10153 relocation += htab->stub_group[sec->id].toc_off;
10154 else
10155 unresolved_reloc = TRUE;
10156 goto dodyn2;
10157
10158 /* TOC16 relocs. We want the offset relative to the TOC base,
10159 which is the address of the start of the TOC plus 0x8000.
10160 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10161 in this order. */
10162 case R_PPC64_TOC16:
10163 case R_PPC64_TOC16_LO:
10164 case R_PPC64_TOC16_HI:
10165 case R_PPC64_TOC16_DS:
10166 case R_PPC64_TOC16_LO_DS:
10167 case R_PPC64_TOC16_HA:
10168 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10169 break;
10170
10171 /* Relocate against the beginning of the section. */
10172 case R_PPC64_SECTOFF:
10173 case R_PPC64_SECTOFF_LO:
10174 case R_PPC64_SECTOFF_HI:
10175 case R_PPC64_SECTOFF_DS:
10176 case R_PPC64_SECTOFF_LO_DS:
10177 case R_PPC64_SECTOFF_HA:
10178 if (sec != NULL)
10179 addend -= sec->output_section->vma;
10180 break;
10181
10182 case R_PPC64_REL14:
10183 case R_PPC64_REL14_BRNTAKEN:
10184 case R_PPC64_REL14_BRTAKEN:
10185 case R_PPC64_REL24:
10186 break;
10187
10188 case R_PPC64_TPREL16:
10189 case R_PPC64_TPREL16_LO:
10190 case R_PPC64_TPREL16_HI:
10191 case R_PPC64_TPREL16_HA:
10192 case R_PPC64_TPREL16_DS:
10193 case R_PPC64_TPREL16_LO_DS:
10194 case R_PPC64_TPREL16_HIGHER:
10195 case R_PPC64_TPREL16_HIGHERA:
10196 case R_PPC64_TPREL16_HIGHEST:
10197 case R_PPC64_TPREL16_HIGHESTA:
10198 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10199 if (info->shared)
10200 /* The TPREL16 relocs shouldn't really be used in shared
10201 libs as they will result in DT_TEXTREL being set, but
10202 support them anyway. */
10203 goto dodyn;
10204 break;
10205
10206 case R_PPC64_DTPREL16:
10207 case R_PPC64_DTPREL16_LO:
10208 case R_PPC64_DTPREL16_HI:
10209 case R_PPC64_DTPREL16_HA:
10210 case R_PPC64_DTPREL16_DS:
10211 case R_PPC64_DTPREL16_LO_DS:
10212 case R_PPC64_DTPREL16_HIGHER:
10213 case R_PPC64_DTPREL16_HIGHERA:
10214 case R_PPC64_DTPREL16_HIGHEST:
10215 case R_PPC64_DTPREL16_HIGHESTA:
10216 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10217 break;
10218
10219 case R_PPC64_DTPMOD64:
10220 relocation = 1;
10221 addend = 0;
10222 goto dodyn;
10223
10224 case R_PPC64_TPREL64:
10225 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10226 goto dodyn;
10227
10228 case R_PPC64_DTPREL64:
10229 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10230 /* Fall thru */
10231
10232 /* Relocations that may need to be propagated if this is a
10233 dynamic object. */
10234 case R_PPC64_REL30:
10235 case R_PPC64_REL32:
10236 case R_PPC64_REL64:
10237 case R_PPC64_ADDR14:
10238 case R_PPC64_ADDR14_BRNTAKEN:
10239 case R_PPC64_ADDR14_BRTAKEN:
10240 case R_PPC64_ADDR16:
10241 case R_PPC64_ADDR16_DS:
10242 case R_PPC64_ADDR16_HA:
10243 case R_PPC64_ADDR16_HI:
10244 case R_PPC64_ADDR16_HIGHER:
10245 case R_PPC64_ADDR16_HIGHERA:
10246 case R_PPC64_ADDR16_HIGHEST:
10247 case R_PPC64_ADDR16_HIGHESTA:
10248 case R_PPC64_ADDR16_LO:
10249 case R_PPC64_ADDR16_LO_DS:
10250 case R_PPC64_ADDR24:
10251 case R_PPC64_ADDR32:
10252 case R_PPC64_ADDR64:
10253 case R_PPC64_UADDR16:
10254 case R_PPC64_UADDR32:
10255 case R_PPC64_UADDR64:
10256 /* r_symndx will be zero only for relocs against symbols
10257 from removed linkonce sections, or sections discarded by
10258 a linker script. */
10259 dodyn:
10260 if (r_symndx == 0)
10261 break;
10262 /* Fall thru. */
10263
10264 dodyn2:
10265 if ((input_section->flags & SEC_ALLOC) == 0)
10266 break;
10267
10268 if (NO_OPD_RELOCS && is_opd)
10269 break;
10270
10271 if ((info->shared
10272 && (h == NULL
10273 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10274 || h->elf.root.type != bfd_link_hash_undefweak)
10275 && (MUST_BE_DYN_RELOC (r_type)
10276 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10277 || (ELIMINATE_COPY_RELOCS
10278 && !info->shared
10279 && h != NULL
10280 && h->elf.dynindx != -1
10281 && !h->elf.non_got_ref
10282 && h->elf.def_dynamic
10283 && !h->elf.def_regular))
10284 {
10285 Elf_Internal_Rela outrel;
10286 bfd_boolean skip, relocate;
10287 asection *sreloc;
10288 bfd_byte *loc;
10289 bfd_vma out_off;
10290
10291 /* When generating a dynamic object, these relocations
10292 are copied into the output file to be resolved at run
10293 time. */
10294
10295 skip = FALSE;
10296 relocate = FALSE;
10297
10298 out_off = _bfd_elf_section_offset (output_bfd, info,
10299 input_section, rel->r_offset);
10300 if (out_off == (bfd_vma) -1)
10301 skip = TRUE;
10302 else if (out_off == (bfd_vma) -2)
10303 skip = TRUE, relocate = TRUE;
10304 out_off += (input_section->output_section->vma
10305 + input_section->output_offset);
10306 outrel.r_offset = out_off;
10307 outrel.r_addend = rel->r_addend;
10308
10309 /* Optimize unaligned reloc use. */
10310 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10311 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10312 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10313 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10314 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10315 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10316 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10317 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10318 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10319
10320 if (skip)
10321 memset (&outrel, 0, sizeof outrel);
10322 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10323 && !is_opd
10324 && r_type != R_PPC64_TOC)
10325 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10326 else
10327 {
10328 /* This symbol is local, or marked to become local,
10329 or this is an opd section reloc which must point
10330 at a local function. */
10331 outrel.r_addend += relocation;
10332 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10333 {
10334 if (is_opd && h != NULL)
10335 {
10336 /* Lie about opd entries. This case occurs
10337 when building shared libraries and we
10338 reference a function in another shared
10339 lib. The same thing happens for a weak
10340 definition in an application that's
10341 overridden by a strong definition in a
10342 shared lib. (I believe this is a generic
10343 bug in binutils handling of weak syms.)
10344 In these cases we won't use the opd
10345 entry in this lib. */
10346 unresolved_reloc = FALSE;
10347 }
10348 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10349
10350 /* We need to relocate .opd contents for ld.so.
10351 Prelink also wants simple and consistent rules
10352 for relocs. This make all RELATIVE relocs have
10353 *r_offset equal to r_addend. */
10354 relocate = TRUE;
10355 }
10356 else
10357 {
10358 long indx = 0;
10359
10360 if (bfd_is_abs_section (sec))
10361 ;
10362 else if (sec == NULL || sec->owner == NULL)
10363 {
10364 bfd_set_error (bfd_error_bad_value);
10365 return FALSE;
10366 }
10367 else
10368 {
10369 asection *osec;
10370
10371 osec = sec->output_section;
10372 indx = elf_section_data (osec)->dynindx;
10373
10374 /* We are turning this relocation into one
10375 against a section symbol, so subtract out
10376 the output section's address but not the
10377 offset of the input section in the output
10378 section. */
10379 outrel.r_addend -= osec->vma;
10380 }
10381
10382 outrel.r_info = ELF64_R_INFO (indx, r_type);
10383 }
10384 }
10385
10386 sreloc = elf_section_data (input_section)->sreloc;
10387 if (sreloc == NULL)
10388 abort ();
10389
10390 loc = sreloc->contents;
10391 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10392 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10393
10394 /* If this reloc is against an external symbol, it will
10395 be computed at runtime, so there's no need to do
10396 anything now. However, for the sake of prelink ensure
10397 that the section contents are a known value. */
10398 if (! relocate)
10399 {
10400 unresolved_reloc = FALSE;
10401 /* The value chosen here is quite arbitrary as ld.so
10402 ignores section contents except for the special
10403 case of .opd where the contents might be accessed
10404 before relocation. Choose zero, as that won't
10405 cause reloc overflow. */
10406 relocation = 0;
10407 addend = 0;
10408 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10409 to improve backward compatibility with older
10410 versions of ld. */
10411 if (r_type == R_PPC64_ADDR64)
10412 addend = outrel.r_addend;
10413 /* Adjust pc_relative relocs to have zero in *r_offset. */
10414 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10415 addend = (input_section->output_section->vma
10416 + input_section->output_offset
10417 + rel->r_offset);
10418 }
10419 }
10420 break;
10421
10422 case R_PPC64_COPY:
10423 case R_PPC64_GLOB_DAT:
10424 case R_PPC64_JMP_SLOT:
10425 case R_PPC64_RELATIVE:
10426 /* We shouldn't ever see these dynamic relocs in relocatable
10427 files. */
10428 /* Fall through. */
10429
10430 case R_PPC64_PLTGOT16:
10431 case R_PPC64_PLTGOT16_DS:
10432 case R_PPC64_PLTGOT16_HA:
10433 case R_PPC64_PLTGOT16_HI:
10434 case R_PPC64_PLTGOT16_LO:
10435 case R_PPC64_PLTGOT16_LO_DS:
10436 case R_PPC64_PLTREL32:
10437 case R_PPC64_PLTREL64:
10438 /* These ones haven't been implemented yet. */
10439
10440 (*_bfd_error_handler)
10441 (_("%B: relocation %s is not supported for symbol %s."),
10442 input_bfd,
10443 ppc64_elf_howto_table[r_type]->name, sym_name);
10444
10445 bfd_set_error (bfd_error_invalid_operation);
10446 ret = FALSE;
10447 continue;
10448 }
10449
10450 /* Do any further special processing. */
10451 switch (r_type)
10452 {
10453 default:
10454 break;
10455
10456 case R_PPC64_ADDR16_HA:
10457 case R_PPC64_ADDR16_HIGHERA:
10458 case R_PPC64_ADDR16_HIGHESTA:
10459 case R_PPC64_GOT16_HA:
10460 case R_PPC64_PLTGOT16_HA:
10461 case R_PPC64_PLT16_HA:
10462 case R_PPC64_TOC16_HA:
10463 case R_PPC64_SECTOFF_HA:
10464 case R_PPC64_TPREL16_HA:
10465 case R_PPC64_DTPREL16_HA:
10466 case R_PPC64_GOT_TLSGD16_HA:
10467 case R_PPC64_GOT_TLSLD16_HA:
10468 case R_PPC64_GOT_TPREL16_HA:
10469 case R_PPC64_GOT_DTPREL16_HA:
10470 case R_PPC64_TPREL16_HIGHER:
10471 case R_PPC64_TPREL16_HIGHERA:
10472 case R_PPC64_TPREL16_HIGHEST:
10473 case R_PPC64_TPREL16_HIGHESTA:
10474 case R_PPC64_DTPREL16_HIGHER:
10475 case R_PPC64_DTPREL16_HIGHERA:
10476 case R_PPC64_DTPREL16_HIGHEST:
10477 case R_PPC64_DTPREL16_HIGHESTA:
10478 /* It's just possible that this symbol is a weak symbol
10479 that's not actually defined anywhere. In that case,
10480 'sec' would be NULL, and we should leave the symbol
10481 alone (it will be set to zero elsewhere in the link). */
10482 if (sec != NULL)
10483 /* Add 0x10000 if sign bit in 0:15 is set.
10484 Bits 0:15 are not used. */
10485 addend += 0x8000;
10486 break;
10487
10488 case R_PPC64_ADDR16_DS:
10489 case R_PPC64_ADDR16_LO_DS:
10490 case R_PPC64_GOT16_DS:
10491 case R_PPC64_GOT16_LO_DS:
10492 case R_PPC64_PLT16_LO_DS:
10493 case R_PPC64_SECTOFF_DS:
10494 case R_PPC64_SECTOFF_LO_DS:
10495 case R_PPC64_TOC16_DS:
10496 case R_PPC64_TOC16_LO_DS:
10497 case R_PPC64_PLTGOT16_DS:
10498 case R_PPC64_PLTGOT16_LO_DS:
10499 case R_PPC64_GOT_TPREL16_DS:
10500 case R_PPC64_GOT_TPREL16_LO_DS:
10501 case R_PPC64_GOT_DTPREL16_DS:
10502 case R_PPC64_GOT_DTPREL16_LO_DS:
10503 case R_PPC64_TPREL16_DS:
10504 case R_PPC64_TPREL16_LO_DS:
10505 case R_PPC64_DTPREL16_DS:
10506 case R_PPC64_DTPREL16_LO_DS:
10507 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10508 mask = 3;
10509 /* If this reloc is against an lq insn, then the value must be
10510 a multiple of 16. This is somewhat of a hack, but the
10511 "correct" way to do this by defining _DQ forms of all the
10512 _DS relocs bloats all reloc switches in this file. It
10513 doesn't seem to make much sense to use any of these relocs
10514 in data, so testing the insn should be safe. */
10515 if ((insn & (0x3f << 26)) == (56u << 26))
10516 mask = 15;
10517 if (((relocation + addend) & mask) != 0)
10518 {
10519 (*_bfd_error_handler)
10520 (_("%B: error: relocation %s not a multiple of %d"),
10521 input_bfd,
10522 ppc64_elf_howto_table[r_type]->name,
10523 mask + 1);
10524 bfd_set_error (bfd_error_bad_value);
10525 ret = FALSE;
10526 continue;
10527 }
10528 break;
10529 }
10530
10531 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10532 because such sections are not SEC_ALLOC and thus ld.so will
10533 not process them. */
10534 if (unresolved_reloc
10535 && !((input_section->flags & SEC_DEBUGGING) != 0
10536 && h->elf.def_dynamic))
10537 {
10538 (*_bfd_error_handler)
10539 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10540 input_bfd,
10541 input_section,
10542 (long) rel->r_offset,
10543 ppc64_elf_howto_table[(int) r_type]->name,
10544 h->elf.root.root.string);
10545 ret = FALSE;
10546 }
10547
10548 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10549 input_bfd,
10550 input_section,
10551 contents,
10552 rel->r_offset,
10553 relocation,
10554 addend);
10555
10556 if (r != bfd_reloc_ok)
10557 {
10558 if (sym_name == NULL)
10559 sym_name = "(null)";
10560 if (r == bfd_reloc_overflow)
10561 {
10562 if (warned)
10563 continue;
10564 if (h != NULL
10565 && h->elf.root.type == bfd_link_hash_undefweak
10566 && ppc64_elf_howto_table[r_type]->pc_relative)
10567 {
10568 /* Assume this is a call protected by other code that
10569 detects the symbol is undefined. If this is the case,
10570 we can safely ignore the overflow. If not, the
10571 program is hosed anyway, and a little warning isn't
10572 going to help. */
10573
10574 continue;
10575 }
10576
10577 if (!((*info->callbacks->reloc_overflow)
10578 (info, (h ? &h->elf.root : NULL), sym_name,
10579 ppc64_elf_howto_table[r_type]->name,
10580 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10581 return FALSE;
10582 }
10583 else
10584 {
10585 (*_bfd_error_handler)
10586 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10587 input_bfd,
10588 input_section,
10589 (long) rel->r_offset,
10590 ppc64_elf_howto_table[r_type]->name,
10591 sym_name,
10592 (int) r);
10593 ret = FALSE;
10594 }
10595 }
10596 }
10597
10598 /* If we're emitting relocations, then shortly after this function
10599 returns, reloc offsets and addends for this section will be
10600 adjusted. Worse, reloc symbol indices will be for the output
10601 file rather than the input. Save a copy of the relocs for
10602 opd_entry_value. */
10603 if (is_opd && info->emitrelocations)
10604 {
10605 bfd_size_type amt;
10606 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10607 rel = bfd_alloc (input_bfd, amt);
10608 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10609 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10610 if (rel == NULL)
10611 return FALSE;
10612 memcpy (rel, relocs, amt);
10613 }
10614 return ret;
10615 }
10616
10617 /* Adjust the value of any local symbols in opd sections. */
10618
10619 static bfd_boolean
10620 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10621 const char *name ATTRIBUTE_UNUSED,
10622 Elf_Internal_Sym *elfsym,
10623 asection *input_sec,
10624 struct elf_link_hash_entry *h)
10625 {
10626 long *opd_adjust, adjust;
10627 bfd_vma value;
10628
10629 if (h != NULL)
10630 return TRUE;
10631
10632 opd_adjust = get_opd_info (input_sec);
10633 if (opd_adjust == NULL)
10634 return TRUE;
10635
10636 value = elfsym->st_value - input_sec->output_offset;
10637 if (!info->relocatable)
10638 value -= input_sec->output_section->vma;
10639
10640 adjust = opd_adjust[value / 8];
10641 if (adjust == -1)
10642 elfsym->st_value = 0;
10643 else
10644 elfsym->st_value += adjust;
10645 return TRUE;
10646 }
10647
10648 /* Finish up dynamic symbol handling. We set the contents of various
10649 dynamic sections here. */
10650
10651 static bfd_boolean
10652 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10653 struct bfd_link_info *info,
10654 struct elf_link_hash_entry *h,
10655 Elf_Internal_Sym *sym)
10656 {
10657 struct ppc_link_hash_table *htab;
10658 bfd *dynobj;
10659 struct plt_entry *ent;
10660 Elf_Internal_Rela rela;
10661 bfd_byte *loc;
10662
10663 htab = ppc_hash_table (info);
10664 dynobj = htab->elf.dynobj;
10665
10666 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10667 if (ent->plt.offset != (bfd_vma) -1)
10668 {
10669 /* This symbol has an entry in the procedure linkage
10670 table. Set it up. */
10671
10672 if (htab->plt == NULL
10673 || htab->relplt == NULL
10674 || htab->glink == NULL)
10675 abort ();
10676
10677 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10678 fill in the PLT entry. */
10679 rela.r_offset = (htab->plt->output_section->vma
10680 + htab->plt->output_offset
10681 + ent->plt.offset);
10682 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10683 rela.r_addend = ent->addend;
10684
10685 loc = htab->relplt->contents;
10686 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10687 * sizeof (Elf64_External_Rela));
10688 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10689 }
10690
10691 if (h->needs_copy)
10692 {
10693 Elf_Internal_Rela rela;
10694 bfd_byte *loc;
10695
10696 /* This symbol needs a copy reloc. Set it up. */
10697
10698 if (h->dynindx == -1
10699 || (h->root.type != bfd_link_hash_defined
10700 && h->root.type != bfd_link_hash_defweak)
10701 || htab->relbss == NULL)
10702 abort ();
10703
10704 rela.r_offset = (h->root.u.def.value
10705 + h->root.u.def.section->output_section->vma
10706 + h->root.u.def.section->output_offset);
10707 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10708 rela.r_addend = 0;
10709 loc = htab->relbss->contents;
10710 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10711 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10712 }
10713
10714 /* Mark some specially defined symbols as absolute. */
10715 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10716 sym->st_shndx = SHN_ABS;
10717
10718 return TRUE;
10719 }
10720
10721 /* Used to decide how to sort relocs in an optimal manner for the
10722 dynamic linker, before writing them out. */
10723
10724 static enum elf_reloc_type_class
10725 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10726 {
10727 enum elf_ppc64_reloc_type r_type;
10728
10729 r_type = ELF64_R_TYPE (rela->r_info);
10730 switch (r_type)
10731 {
10732 case R_PPC64_RELATIVE:
10733 return reloc_class_relative;
10734 case R_PPC64_JMP_SLOT:
10735 return reloc_class_plt;
10736 case R_PPC64_COPY:
10737 return reloc_class_copy;
10738 default:
10739 return reloc_class_normal;
10740 }
10741 }
10742
10743 /* Finish up the dynamic sections. */
10744
10745 static bfd_boolean
10746 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10747 struct bfd_link_info *info)
10748 {
10749 struct ppc_link_hash_table *htab;
10750 bfd *dynobj;
10751 asection *sdyn;
10752
10753 htab = ppc_hash_table (info);
10754 dynobj = htab->elf.dynobj;
10755 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10756
10757 if (htab->elf.dynamic_sections_created)
10758 {
10759 Elf64_External_Dyn *dyncon, *dynconend;
10760
10761 if (sdyn == NULL || htab->got == NULL)
10762 abort ();
10763
10764 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10765 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10766 for (; dyncon < dynconend; dyncon++)
10767 {
10768 Elf_Internal_Dyn dyn;
10769 asection *s;
10770
10771 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10772
10773 switch (dyn.d_tag)
10774 {
10775 default:
10776 continue;
10777
10778 case DT_PPC64_GLINK:
10779 s = htab->glink;
10780 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10781 /* We stupidly defined DT_PPC64_GLINK to be the start
10782 of glink rather than the first entry point, which is
10783 what ld.so needs, and now have a bigger stub to
10784 support automatic multiple TOCs. */
10785 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10786 break;
10787
10788 case DT_PPC64_OPD:
10789 s = bfd_get_section_by_name (output_bfd, ".opd");
10790 if (s == NULL)
10791 continue;
10792 dyn.d_un.d_ptr = s->vma;
10793 break;
10794
10795 case DT_PPC64_OPDSZ:
10796 s = bfd_get_section_by_name (output_bfd, ".opd");
10797 if (s == NULL)
10798 continue;
10799 dyn.d_un.d_val = s->size;
10800 break;
10801
10802 case DT_PLTGOT:
10803 s = htab->plt;
10804 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10805 break;
10806
10807 case DT_JMPREL:
10808 s = htab->relplt;
10809 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10810 break;
10811
10812 case DT_PLTRELSZ:
10813 dyn.d_un.d_val = htab->relplt->size;
10814 break;
10815
10816 case DT_RELASZ:
10817 /* Don't count procedure linkage table relocs in the
10818 overall reloc count. */
10819 s = htab->relplt;
10820 if (s == NULL)
10821 continue;
10822 dyn.d_un.d_val -= s->size;
10823 break;
10824
10825 case DT_RELA:
10826 /* We may not be using the standard ELF linker script.
10827 If .rela.plt is the first .rela section, we adjust
10828 DT_RELA to not include it. */
10829 s = htab->relplt;
10830 if (s == NULL)
10831 continue;
10832 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10833 continue;
10834 dyn.d_un.d_ptr += s->size;
10835 break;
10836 }
10837
10838 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10839 }
10840 }
10841
10842 if (htab->got != NULL && htab->got->size != 0)
10843 {
10844 /* Fill in the first entry in the global offset table.
10845 We use it to hold the link-time TOCbase. */
10846 bfd_put_64 (output_bfd,
10847 elf_gp (output_bfd) + TOC_BASE_OFF,
10848 htab->got->contents);
10849
10850 /* Set .got entry size. */
10851 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10852 }
10853
10854 if (htab->plt != NULL && htab->plt->size != 0)
10855 {
10856 /* Set .plt entry size. */
10857 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10858 = PLT_ENTRY_SIZE;
10859 }
10860
10861 /* We need to handle writing out multiple GOT sections ourselves,
10862 since we didn't add them to DYNOBJ. We know dynobj is the first
10863 bfd. */
10864 while ((dynobj = dynobj->link_next) != NULL)
10865 {
10866 asection *s;
10867
10868 if (!is_ppc64_elf_target (dynobj->xvec))
10869 continue;
10870
10871 s = ppc64_elf_tdata (dynobj)->got;
10872 if (s != NULL
10873 && s->size != 0
10874 && s->output_section != bfd_abs_section_ptr
10875 && !bfd_set_section_contents (output_bfd, s->output_section,
10876 s->contents, s->output_offset,
10877 s->size))
10878 return FALSE;
10879 s = ppc64_elf_tdata (dynobj)->relgot;
10880 if (s != NULL
10881 && s->size != 0
10882 && s->output_section != bfd_abs_section_ptr
10883 && !bfd_set_section_contents (output_bfd, s->output_section,
10884 s->contents, s->output_offset,
10885 s->size))
10886 return FALSE;
10887 }
10888
10889 return TRUE;
10890 }
10891
10892 #include "elf64-target.h"
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