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* elf64-ppc.c (is_ppc64_target): New function, extracted from..
[binutils.git] / bfd / elf64-ppc.c
blob865460575360e087545dacf9d67f62b56c15cfb3
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
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
2385 #define ppc64_elf_tdata(bfd) \
2386 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2387
2388 #define ppc64_tlsld_got(bfd) \
2389 (&ppc64_elf_tdata (bfd)->tlsld_got)
2390
2391 /* Override the generic function because we store some extras. */
2392
2393 static bfd_boolean
2394 ppc64_elf_mkobject (bfd *abfd)
2395 {
2396 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2397 abfd->tdata.any = bfd_zalloc (abfd, amt);
2398 if (abfd->tdata.any == NULL)
2399 return FALSE;
2400 return TRUE;
2401 }
2402
2403 static bfd_boolean
2404 is_ppc64_target (const struct bfd_target *targ)
2405 {
2406 extern const bfd_target bfd_elf64_powerpc_vec;
2407 extern const bfd_target bfd_elf64_powerpcle_vec;
2408
2409 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2410 }
2411
2412 /* Fix bad default arch selected for a 64 bit input bfd when the
2413 default is 32 bit. */
2414
2415 static bfd_boolean
2416 ppc64_elf_object_p (bfd *abfd)
2417 {
2418 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2419 {
2420 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2421
2422 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2423 {
2424 /* Relies on arch after 32 bit default being 64 bit default. */
2425 abfd->arch_info = abfd->arch_info->next;
2426 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2427 }
2428 }
2429 return TRUE;
2430 }
2431
2432 /* Support for core dump NOTE sections. */
2433
2434 static bfd_boolean
2435 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2436 {
2437 size_t offset, size;
2438
2439 if (note->descsz != 504)
2440 return FALSE;
2441
2442 /* pr_cursig */
2443 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2444
2445 /* pr_pid */
2446 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2447
2448 /* pr_reg */
2449 offset = 112;
2450 size = 384;
2451
2452 /* Make a ".reg/999" section. */
2453 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2454 size, note->descpos + offset);
2455 }
2456
2457 static bfd_boolean
2458 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2459 {
2460 if (note->descsz != 136)
2461 return FALSE;
2462
2463 elf_tdata (abfd)->core_program
2464 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2465 elf_tdata (abfd)->core_command
2466 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2467
2468 return TRUE;
2469 }
2470
2471 /* Merge backend specific data from an object file to the output
2472 object file when linking. */
2473
2474 static bfd_boolean
2475 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2476 {
2477 /* Check if we have the same endianess. */
2478 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2479 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2480 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2481 {
2482 const char *msg;
2483
2484 if (bfd_big_endian (ibfd))
2485 msg = _("%B: compiled for a big endian system "
2486 "and target is little endian");
2487 else
2488 msg = _("%B: compiled for a little endian system "
2489 "and target is big endian");
2490
2491 (*_bfd_error_handler) (msg, ibfd);
2492
2493 bfd_set_error (bfd_error_wrong_format);
2494 return FALSE;
2495 }
2496
2497 return TRUE;
2498 }
2499
2500 /* Add extra PPC sections. */
2501
2502 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2503 {
2504 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2505 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2506 { ".plt", 4, 0, SHT_NOBITS, 0 },
2507 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2508 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2509 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2510 { NULL, 0, 0, 0, 0 }
2511 };
2512
2513 struct _ppc64_elf_section_data
2514 {
2515 struct bfd_elf_section_data elf;
2516
2517 /* An array with one entry for each opd function descriptor. */
2518 union
2519 {
2520 /* Points to the function code section for local opd entries. */
2521 asection **func_sec;
2522 /* After editing .opd, adjust references to opd local syms. */
2523 long *adjust;
2524 } opd;
2525
2526 /* An array for toc sections, indexed by offset/8.
2527 Specifies the relocation symbol index used at a given toc offset. */
2528 unsigned *t_symndx;
2529 };
2530
2531 #define ppc64_elf_section_data(sec) \
2532 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2533
2534 static bfd_boolean
2535 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2536 {
2537 struct _ppc64_elf_section_data *sdata;
2538 bfd_size_type amt = sizeof (*sdata);
2539
2540 sdata = bfd_zalloc (abfd, amt);
2541 if (sdata == NULL)
2542 return FALSE;
2543 sec->used_by_bfd = sdata;
2544
2545 return _bfd_elf_new_section_hook (abfd, sec);
2546 }
2547
2548 static void *
2549 get_opd_info (asection * sec)
2550 {
2551 if (sec != NULL
2552 && ppc64_elf_section_data (sec) != NULL
2553 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2554 return ppc64_elf_section_data (sec)->opd.adjust;
2555 return NULL;
2556 }
2557 \f
2558 /* Parameters for the qsort hook. */
2559 static asection *synthetic_opd;
2560 static bfd_boolean synthetic_relocatable;
2561
2562 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2563
2564 static int
2565 compare_symbols (const void *ap, const void *bp)
2566 {
2567 const asymbol *a = * (const asymbol **) ap;
2568 const asymbol *b = * (const asymbol **) bp;
2569
2570 /* Section symbols first. */
2571 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2572 return -1;
2573 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2574 return 1;
2575
2576 /* then .opd symbols. */
2577 if (a->section == synthetic_opd && b->section != synthetic_opd)
2578 return -1;
2579 if (a->section != synthetic_opd && b->section == synthetic_opd)
2580 return 1;
2581
2582 /* then other code symbols. */
2583 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2584 == (SEC_CODE | SEC_ALLOC)
2585 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2586 != (SEC_CODE | SEC_ALLOC))
2587 return -1;
2588
2589 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2590 != (SEC_CODE | SEC_ALLOC)
2591 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2592 == (SEC_CODE | SEC_ALLOC))
2593 return 1;
2594
2595 if (synthetic_relocatable)
2596 {
2597 if (a->section->id < b->section->id)
2598 return -1;
2599
2600 if (a->section->id > b->section->id)
2601 return 1;
2602 }
2603
2604 if (a->value + a->section->vma < b->value + b->section->vma)
2605 return -1;
2606
2607 if (a->value + a->section->vma > b->value + b->section->vma)
2608 return 1;
2609
2610 return 0;
2611 }
2612
2613 /* Search SYMS for a symbol of the given VALUE. */
2614
2615 static asymbol *
2616 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2617 {
2618 long mid;
2619
2620 if (id == -1)
2621 {
2622 while (lo < hi)
2623 {
2624 mid = (lo + hi) >> 1;
2625 if (syms[mid]->value + syms[mid]->section->vma < value)
2626 lo = mid + 1;
2627 else if (syms[mid]->value + syms[mid]->section->vma > value)
2628 hi = mid;
2629 else
2630 return syms[mid];
2631 }
2632 }
2633 else
2634 {
2635 while (lo < hi)
2636 {
2637 mid = (lo + hi) >> 1;
2638 if (syms[mid]->section->id < id)
2639 lo = mid + 1;
2640 else if (syms[mid]->section->id > id)
2641 hi = mid;
2642 else if (syms[mid]->value < value)
2643 lo = mid + 1;
2644 else if (syms[mid]->value > value)
2645 hi = mid;
2646 else
2647 return syms[mid];
2648 }
2649 }
2650 return NULL;
2651 }
2652
2653 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2654 entry syms. */
2655
2656 static long
2657 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2658 long static_count, asymbol **static_syms,
2659 long dyn_count, asymbol **dyn_syms,
2660 asymbol **ret)
2661 {
2662 asymbol *s;
2663 long i;
2664 long count;
2665 char *names;
2666 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2667 asection *opd;
2668 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2669 asymbol **syms;
2670
2671 *ret = NULL;
2672
2673 opd = bfd_get_section_by_name (abfd, ".opd");
2674 if (opd == NULL)
2675 return 0;
2676
2677 symcount = static_count;
2678 if (!relocatable)
2679 symcount += dyn_count;
2680 if (symcount == 0)
2681 return 0;
2682
2683 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2684 if (syms == NULL)
2685 return 0;
2686
2687 if (!relocatable && static_count != 0 && dyn_count != 0)
2688 {
2689 /* Use both symbol tables. */
2690 memcpy (syms, static_syms, static_count * sizeof (*syms));
2691 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2692 }
2693 else if (!relocatable && static_count == 0)
2694 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2695 else
2696 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2697
2698 synthetic_opd = opd;
2699 synthetic_relocatable = relocatable;
2700 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2701
2702 if (!relocatable && symcount > 1)
2703 {
2704 long j;
2705 /* Trim duplicate syms, since we may have merged the normal and
2706 dynamic symbols. Actually, we only care about syms that have
2707 different values, so trim any with the same value. */
2708 for (i = 1, j = 1; i < symcount; ++i)
2709 if (syms[i - 1]->value + syms[i - 1]->section->vma
2710 != syms[i]->value + syms[i]->section->vma)
2711 syms[j++] = syms[i];
2712 symcount = j;
2713 }
2714
2715 i = 0;
2716 if (syms[i]->section == opd)
2717 ++i;
2718 codesecsym = i;
2719
2720 for (; i < symcount; ++i)
2721 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2722 != (SEC_CODE | SEC_ALLOC))
2723 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2724 break;
2725 codesecsymend = i;
2726
2727 for (; i < symcount; ++i)
2728 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2729 break;
2730 secsymend = i;
2731
2732 for (; i < symcount; ++i)
2733 if (syms[i]->section != opd)
2734 break;
2735 opdsymend = i;
2736
2737 for (; i < symcount; ++i)
2738 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2739 != (SEC_CODE | SEC_ALLOC))
2740 break;
2741 symcount = i;
2742
2743 count = 0;
2744 if (opdsymend == secsymend)
2745 goto done;
2746
2747 if (relocatable)
2748 {
2749 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2750 arelent *r;
2751 size_t size;
2752 long relcount;
2753
2754 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2755 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2756
2757 if (! relcount
2758 || ! (*slurp_relocs) (abfd, opd, static_syms, FALSE))
2759 goto done;
2760
2761 size = 0;
2762 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2763 {
2764 asymbol *sym;
2765
2766 while (r < opd->relocation + relcount
2767 && r->address < syms[i]->value + opd->vma)
2768 ++r;
2769
2770 if (r == opd->relocation + relcount)
2771 break;
2772
2773 if (r->address != syms[i]->value + opd->vma)
2774 continue;
2775
2776 if (r->howto->type != R_PPC64_ADDR64)
2777 continue;
2778
2779 sym = *r->sym_ptr_ptr;
2780 if (!sym_exists_at (syms, opdsymend, symcount,
2781 sym->section->id, sym->value + r->addend))
2782 {
2783 ++count;
2784 size += sizeof (asymbol);
2785 size += strlen (syms[i]->name) + 2;
2786 }
2787 }
2788
2789 s = *ret = bfd_malloc (size);
2790 if (s == NULL)
2791 {
2792 count = 0;
2793 goto done;
2794 }
2795
2796 names = (char *) (s + count);
2797
2798 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2799 {
2800 asymbol *sym;
2801
2802 while (r < opd->relocation + relcount
2803 && r->address < syms[i]->value + opd->vma)
2804 ++r;
2805
2806 if (r == opd->relocation + relcount)
2807 break;
2808
2809 if (r->address != syms[i]->value + opd->vma)
2810 continue;
2811
2812 if (r->howto->type != R_PPC64_ADDR64)
2813 continue;
2814
2815 sym = *r->sym_ptr_ptr;
2816 if (!sym_exists_at (syms, opdsymend, symcount,
2817 sym->section->id, sym->value + r->addend))
2818 {
2819 size_t len;
2820
2821 *s = *syms[i];
2822 s->section = sym->section;
2823 s->value = sym->value + r->addend;
2824 s->name = names;
2825 *names++ = '.';
2826 len = strlen (syms[i]->name);
2827 memcpy (names, syms[i]->name, len + 1);
2828 names += len + 1;
2829 s++;
2830 }
2831 }
2832 }
2833 else
2834 {
2835 bfd_byte *contents;
2836 size_t size;
2837
2838 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2839 {
2840 if (contents)
2841 {
2842 free_contents_and_exit:
2843 free (contents);
2844 }
2845 goto done;
2846 }
2847
2848 size = 0;
2849 for (i = secsymend; i < opdsymend; ++i)
2850 {
2851 bfd_vma ent;
2852
2853 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2854 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2855 {
2856 ++count;
2857 size += sizeof (asymbol);
2858 size += strlen (syms[i]->name) + 2;
2859 }
2860 }
2861
2862 s = *ret = bfd_malloc (size);
2863 if (s == NULL)
2864 {
2865 count = 0;
2866 goto free_contents_and_exit;
2867 }
2868
2869 names = (char *) (s + count);
2870
2871 for (i = secsymend; i < opdsymend; ++i)
2872 {
2873 bfd_vma ent;
2874
2875 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2876 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2877 {
2878 long lo, hi;
2879 size_t len;
2880 asection *sec = abfd->sections;
2881
2882 *s = *syms[i];
2883 lo = codesecsym;
2884 hi = codesecsymend;
2885 while (lo < hi)
2886 {
2887 long mid = (lo + hi) >> 1;
2888 if (syms[mid]->section->vma < ent)
2889 lo = mid + 1;
2890 else if (syms[mid]->section->vma > ent)
2891 hi = mid;
2892 else
2893 {
2894 sec = syms[mid]->section;
2895 break;
2896 }
2897 }
2898
2899 if (lo >= hi && lo > codesecsym)
2900 sec = syms[lo - 1]->section;
2901
2902 for (; sec != NULL; sec = sec->next)
2903 {
2904 if (sec->vma > ent)
2905 break;
2906 if ((sec->flags & SEC_ALLOC) == 0
2907 || (sec->flags & SEC_LOAD) == 0)
2908 break;
2909 if ((sec->flags & SEC_CODE) != 0)
2910 s->section = sec;
2911 }
2912 s->value = ent - s->section->vma;
2913 s->name = names;
2914 *names++ = '.';
2915 len = strlen (syms[i]->name);
2916 memcpy (names, syms[i]->name, len + 1);
2917 names += len + 1;
2918 s++;
2919 }
2920 }
2921 free (contents);
2922 }
2923
2924 done:
2925 free (syms);
2926 return count;
2927 }
2928 \f
2929 /* The following functions are specific to the ELF linker, while
2930 functions above are used generally. Those named ppc64_elf_* are
2931 called by the main ELF linker code. They appear in this file more
2932 or less in the order in which they are called. eg.
2933 ppc64_elf_check_relocs is called early in the link process,
2934 ppc64_elf_finish_dynamic_sections is one of the last functions
2935 called.
2936
2937 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2938 functions have both a function code symbol and a function descriptor
2939 symbol. A call to foo in a relocatable object file looks like:
2940
2941 . .text
2942 . x:
2943 . bl .foo
2944 . nop
2945
2946 The function definition in another object file might be:
2947
2948 . .section .opd
2949 . foo: .quad .foo
2950 . .quad .TOC.@tocbase
2951 . .quad 0
2952 .
2953 . .text
2954 . .foo: blr
2955
2956 When the linker resolves the call during a static link, the branch
2957 unsurprisingly just goes to .foo and the .opd information is unused.
2958 If the function definition is in a shared library, things are a little
2959 different: The call goes via a plt call stub, the opd information gets
2960 copied to the plt, and the linker patches the nop.
2961
2962 . x:
2963 . bl .foo_stub
2964 . ld 2,40(1)
2965 .
2966 .
2967 . .foo_stub:
2968 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2969 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2970 . std 2,40(1) # this is the general idea
2971 . ld 11,0(12)
2972 . ld 2,8(12)
2973 . mtctr 11
2974 . ld 11,16(12)
2975 . bctr
2976 .
2977 . .section .plt
2978 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2979
2980 The "reloc ()" notation is supposed to indicate that the linker emits
2981 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2982 copying.
2983
2984 What are the difficulties here? Well, firstly, the relocations
2985 examined by the linker in check_relocs are against the function code
2986 sym .foo, while the dynamic relocation in the plt is emitted against
2987 the function descriptor symbol, foo. Somewhere along the line, we need
2988 to carefully copy dynamic link information from one symbol to the other.
2989 Secondly, the generic part of the elf linker will make .foo a dynamic
2990 symbol as is normal for most other backends. We need foo dynamic
2991 instead, at least for an application final link. However, when
2992 creating a shared library containing foo, we need to have both symbols
2993 dynamic so that references to .foo are satisfied during the early
2994 stages of linking. Otherwise the linker might decide to pull in a
2995 definition from some other object, eg. a static library.
2996
2997 Update: As of August 2004, we support a new convention. Function
2998 calls may use the function descriptor symbol, ie. "bl foo". This
2999 behaves exactly as "bl .foo". */
3000
3001 /* The linker needs to keep track of the number of relocs that it
3002 decides to copy as dynamic relocs in check_relocs for each symbol.
3003 This is so that it can later discard them if they are found to be
3004 unnecessary. We store the information in a field extending the
3005 regular ELF linker hash table. */
3006
3007 struct ppc_dyn_relocs
3008 {
3009 struct ppc_dyn_relocs *next;
3010
3011 /* The input section of the reloc. */
3012 asection *sec;
3013
3014 /* Total number of relocs copied for the input section. */
3015 bfd_size_type count;
3016
3017 /* Number of pc-relative relocs copied for the input section. */
3018 bfd_size_type pc_count;
3019 };
3020
3021 /* Track GOT entries needed for a given symbol. We might need more
3022 than one got entry per symbol. */
3023 struct got_entry
3024 {
3025 struct got_entry *next;
3026
3027 /* The symbol addend that we'll be placing in the GOT. */
3028 bfd_vma addend;
3029
3030 /* Unlike other ELF targets, we use separate GOT entries for the same
3031 symbol referenced from different input files. This is to support
3032 automatic multiple TOC/GOT sections, where the TOC base can vary
3033 from one input file to another.
3034
3035 Point to the BFD owning this GOT entry. */
3036 bfd *owner;
3037
3038 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3039 TLS_TPREL or TLS_DTPREL for tls entries. */
3040 char tls_type;
3041
3042 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3043 union
3044 {
3045 bfd_signed_vma refcount;
3046 bfd_vma offset;
3047 } got;
3048 };
3049
3050 /* The same for PLT. */
3051 struct plt_entry
3052 {
3053 struct plt_entry *next;
3054
3055 bfd_vma addend;
3056
3057 union
3058 {
3059 bfd_signed_vma refcount;
3060 bfd_vma offset;
3061 } plt;
3062 };
3063
3064 /* Of those relocs that might be copied as dynamic relocs, this macro
3065 selects those that must be copied when linking a shared library,
3066 even when the symbol is local. */
3067
3068 #define MUST_BE_DYN_RELOC(RTYPE) \
3069 ((RTYPE) != R_PPC64_REL32 \
3070 && (RTYPE) != R_PPC64_REL64 \
3071 && (RTYPE) != R_PPC64_REL30)
3072
3073 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3074 copying dynamic variables from a shared lib into an app's dynbss
3075 section, and instead use a dynamic relocation to point into the
3076 shared lib. With code that gcc generates, it's vital that this be
3077 enabled; In the PowerPC64 ABI, the address of a function is actually
3078 the address of a function descriptor, which resides in the .opd
3079 section. gcc uses the descriptor directly rather than going via the
3080 GOT as some other ABI's do, which means that initialized function
3081 pointers must reference the descriptor. Thus, a function pointer
3082 initialized to the address of a function in a shared library will
3083 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3084 redefines the function descriptor symbol to point to the copy. This
3085 presents a problem as a plt entry for that function is also
3086 initialized from the function descriptor symbol and the copy reloc
3087 may not be initialized first. */
3088 #define ELIMINATE_COPY_RELOCS 1
3089
3090 /* Section name for stubs is the associated section name plus this
3091 string. */
3092 #define STUB_SUFFIX ".stub"
3093
3094 /* Linker stubs.
3095 ppc_stub_long_branch:
3096 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3097 destination, but a 24 bit branch in a stub section will reach.
3098 . b dest
3099
3100 ppc_stub_plt_branch:
3101 Similar to the above, but a 24 bit branch in the stub section won't
3102 reach its destination.
3103 . addis %r12,%r2,xxx@toc@ha
3104 . ld %r11,xxx@toc@l(%r12)
3105 . mtctr %r11
3106 . bctr
3107
3108 ppc_stub_plt_call:
3109 Used to call a function in a shared library. If it so happens that
3110 the plt entry referenced crosses a 64k boundary, then an extra
3111 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3112 xxx+16 as appropriate.
3113 . addis %r12,%r2,xxx@toc@ha
3114 . std %r2,40(%r1)
3115 . ld %r11,xxx+0@toc@l(%r12)
3116 . ld %r2,xxx+8@toc@l(%r12)
3117 . mtctr %r11
3118 . ld %r11,xxx+16@toc@l(%r12)
3119 . bctr
3120
3121 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3122 code to adjust the value and save r2 to support multiple toc sections.
3123 A ppc_stub_long_branch with an r2 offset looks like:
3124 . std %r2,40(%r1)
3125 . addis %r2,%r2,off@ha
3126 . addi %r2,%r2,off@l
3127 . b dest
3128
3129 A ppc_stub_plt_branch with an r2 offset looks like:
3130 . std %r2,40(%r1)
3131 . addis %r12,%r2,xxx@toc@ha
3132 . ld %r11,xxx@toc@l(%r12)
3133 . addis %r2,%r2,off@ha
3134 . addi %r2,%r2,off@l
3135 . mtctr %r11
3136 . bctr
3137 */
3138
3139 enum ppc_stub_type {
3140 ppc_stub_none,
3141 ppc_stub_long_branch,
3142 ppc_stub_long_branch_r2off,
3143 ppc_stub_plt_branch,
3144 ppc_stub_plt_branch_r2off,
3145 ppc_stub_plt_call
3146 };
3147
3148 struct ppc_stub_hash_entry {
3149
3150 /* Base hash table entry structure. */
3151 struct bfd_hash_entry root;
3152
3153 enum ppc_stub_type stub_type;
3154
3155 /* The stub section. */
3156 asection *stub_sec;
3157
3158 /* Offset within stub_sec of the beginning of this stub. */
3159 bfd_vma stub_offset;
3160
3161 /* Given the symbol's value and its section we can determine its final
3162 value when building the stubs (so the stub knows where to jump. */
3163 bfd_vma target_value;
3164 asection *target_section;
3165
3166 /* The symbol table entry, if any, that this was derived from. */
3167 struct ppc_link_hash_entry *h;
3168
3169 /* And the reloc addend that this was derived from. */
3170 bfd_vma addend;
3171
3172 /* Where this stub is being called from, or, in the case of combined
3173 stub sections, the first input section in the group. */
3174 asection *id_sec;
3175 };
3176
3177 struct ppc_branch_hash_entry {
3178
3179 /* Base hash table entry structure. */
3180 struct bfd_hash_entry root;
3181
3182 /* Offset within .branch_lt. */
3183 unsigned int offset;
3184
3185 /* Generation marker. */
3186 unsigned int iter;
3187 };
3188
3189 struct ppc_link_hash_entry
3190 {
3191 struct elf_link_hash_entry elf;
3192
3193 /* A pointer to the most recently used stub hash entry against this
3194 symbol. */
3195 struct ppc_stub_hash_entry *stub_cache;
3196
3197 /* Track dynamic relocs copied for this symbol. */
3198 struct ppc_dyn_relocs *dyn_relocs;
3199
3200 /* Link between function code and descriptor symbols. */
3201 struct ppc_link_hash_entry *oh;
3202
3203 /* Flag function code and descriptor symbols. */
3204 unsigned int is_func:1;
3205 unsigned int is_func_descriptor:1;
3206
3207 /* Whether global opd sym has been adjusted or not.
3208 After ppc64_elf_edit_opd has run, this flag should be set for all
3209 globals defined in any opd section. */
3210 unsigned int adjust_done:1;
3211
3212 /* Set if we twiddled this symbol to weak at some stage. */
3213 unsigned int was_undefined:1;
3214
3215 /* Contexts in which symbol is used in the GOT (or TOC).
3216 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3217 corresponding relocs are encountered during check_relocs.
3218 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3219 indicate the corresponding GOT entry type is not needed.
3220 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3221 a TPREL one. We use a separate flag rather than setting TPREL
3222 just for convenience in distinguishing the two cases. */
3223 #define TLS_GD 1 /* GD reloc. */
3224 #define TLS_LD 2 /* LD reloc. */
3225 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3226 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3227 #define TLS_TLS 16 /* Any TLS reloc. */
3228 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3229 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3230 char tls_mask;
3231 };
3232
3233 /* ppc64 ELF linker hash table. */
3234
3235 struct ppc_link_hash_table
3236 {
3237 struct elf_link_hash_table elf;
3238
3239 /* The stub hash table. */
3240 struct bfd_hash_table stub_hash_table;
3241
3242 /* Another hash table for plt_branch stubs. */
3243 struct bfd_hash_table branch_hash_table;
3244
3245 /* Linker stub bfd. */
3246 bfd *stub_bfd;
3247
3248 /* Linker call-backs. */
3249 asection * (*add_stub_section) (const char *, asection *);
3250 void (*layout_sections_again) (void);
3251
3252 /* Array to keep track of which stub sections have been created, and
3253 information on stub grouping. */
3254 struct map_stub {
3255 /* This is the section to which stubs in the group will be attached. */
3256 asection *link_sec;
3257 /* The stub section. */
3258 asection *stub_sec;
3259 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3260 bfd_vma toc_off;
3261 } *stub_group;
3262
3263 /* Temp used when calculating TOC pointers. */
3264 bfd_vma toc_curr;
3265
3266 /* Highest input section id. */
3267 int top_id;
3268
3269 /* Highest output section index. */
3270 int top_index;
3271
3272 /* List of input sections for each output section. */
3273 asection **input_list;
3274
3275 /* Short-cuts to get to dynamic linker sections. */
3276 asection *got;
3277 asection *plt;
3278 asection *relplt;
3279 asection *dynbss;
3280 asection *relbss;
3281 asection *glink;
3282 asection *sfpr;
3283 asection *brlt;
3284 asection *relbrlt;
3285
3286 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3287 struct ppc_link_hash_entry *tls_get_addr;
3288 struct ppc_link_hash_entry *tls_get_addr_fd;
3289
3290 /* Statistics. */
3291 unsigned long stub_count[ppc_stub_plt_call];
3292
3293 /* Set if we should emit symbols for stubs. */
3294 unsigned int emit_stub_syms:1;
3295
3296 /* Set on error. */
3297 unsigned int stub_error:1;
3298
3299 /* Flag set when small branches are detected. Used to
3300 select suitable defaults for the stub group size. */
3301 unsigned int has_14bit_branch:1;
3302
3303 /* Temp used by ppc64_elf_check_directives. */
3304 unsigned int twiddled_syms:1;
3305
3306 /* Incremented every time we size stubs. */
3307 unsigned int stub_iteration;
3308
3309 /* Small local sym to section mapping cache. */
3310 struct sym_sec_cache sym_sec;
3311 };
3312
3313 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3314
3315 #define ppc_hash_table(p) \
3316 ((struct ppc_link_hash_table *) ((p)->hash))
3317
3318 #define ppc_stub_hash_lookup(table, string, create, copy) \
3319 ((struct ppc_stub_hash_entry *) \
3320 bfd_hash_lookup ((table), (string), (create), (copy)))
3321
3322 #define ppc_branch_hash_lookup(table, string, create, copy) \
3323 ((struct ppc_branch_hash_entry *) \
3324 bfd_hash_lookup ((table), (string), (create), (copy)))
3325
3326 /* Create an entry in the stub hash table. */
3327
3328 static struct bfd_hash_entry *
3329 stub_hash_newfunc (struct bfd_hash_entry *entry,
3330 struct bfd_hash_table *table,
3331 const char *string)
3332 {
3333 /* Allocate the structure if it has not already been allocated by a
3334 subclass. */
3335 if (entry == NULL)
3336 {
3337 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3338 if (entry == NULL)
3339 return entry;
3340 }
3341
3342 /* Call the allocation method of the superclass. */
3343 entry = bfd_hash_newfunc (entry, table, string);
3344 if (entry != NULL)
3345 {
3346 struct ppc_stub_hash_entry *eh;
3347
3348 /* Initialize the local fields. */
3349 eh = (struct ppc_stub_hash_entry *) entry;
3350 eh->stub_type = ppc_stub_none;
3351 eh->stub_sec = NULL;
3352 eh->stub_offset = 0;
3353 eh->target_value = 0;
3354 eh->target_section = NULL;
3355 eh->h = NULL;
3356 eh->id_sec = NULL;
3357 }
3358
3359 return entry;
3360 }
3361
3362 /* Create an entry in the branch hash table. */
3363
3364 static struct bfd_hash_entry *
3365 branch_hash_newfunc (struct bfd_hash_entry *entry,
3366 struct bfd_hash_table *table,
3367 const char *string)
3368 {
3369 /* Allocate the structure if it has not already been allocated by a
3370 subclass. */
3371 if (entry == NULL)
3372 {
3373 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3374 if (entry == NULL)
3375 return entry;
3376 }
3377
3378 /* Call the allocation method of the superclass. */
3379 entry = bfd_hash_newfunc (entry, table, string);
3380 if (entry != NULL)
3381 {
3382 struct ppc_branch_hash_entry *eh;
3383
3384 /* Initialize the local fields. */
3385 eh = (struct ppc_branch_hash_entry *) entry;
3386 eh->offset = 0;
3387 eh->iter = 0;
3388 }
3389
3390 return entry;
3391 }
3392
3393 /* Create an entry in a ppc64 ELF linker hash table. */
3394
3395 static struct bfd_hash_entry *
3396 link_hash_newfunc (struct bfd_hash_entry *entry,
3397 struct bfd_hash_table *table,
3398 const char *string)
3399 {
3400 /* Allocate the structure if it has not already been allocated by a
3401 subclass. */
3402 if (entry == NULL)
3403 {
3404 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3405 if (entry == NULL)
3406 return entry;
3407 }
3408
3409 /* Call the allocation method of the superclass. */
3410 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3411 if (entry != NULL)
3412 {
3413 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3414
3415 eh->stub_cache = NULL;
3416 eh->dyn_relocs = NULL;
3417 eh->oh = NULL;
3418 eh->is_func = 0;
3419 eh->is_func_descriptor = 0;
3420 eh->adjust_done = 0;
3421 eh->was_undefined = 0;
3422 eh->tls_mask = 0;
3423 }
3424
3425 return entry;
3426 }
3427
3428 /* Create a ppc64 ELF linker hash table. */
3429
3430 static struct bfd_link_hash_table *
3431 ppc64_elf_link_hash_table_create (bfd *abfd)
3432 {
3433 struct ppc_link_hash_table *htab;
3434 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3435
3436 htab = bfd_zmalloc (amt);
3437 if (htab == NULL)
3438 return NULL;
3439
3440 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3441 {
3442 free (htab);
3443 return NULL;
3444 }
3445
3446 /* Init the stub hash table too. */
3447 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3448 return NULL;
3449
3450 /* And the branch hash table. */
3451 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3452 return NULL;
3453
3454 /* Initializing two fields of the union is just cosmetic. We really
3455 only care about glist, but when compiled on a 32-bit host the
3456 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3457 debugger inspection of these fields look nicer. */
3458 htab->elf.init_refcount.refcount = 0;
3459 htab->elf.init_refcount.glist = NULL;
3460 htab->elf.init_offset.offset = 0;
3461 htab->elf.init_offset.glist = NULL;
3462
3463 return &htab->elf.root;
3464 }
3465
3466 /* Free the derived linker hash table. */
3467
3468 static void
3469 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3470 {
3471 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3472
3473 bfd_hash_table_free (&ret->stub_hash_table);
3474 bfd_hash_table_free (&ret->branch_hash_table);
3475 _bfd_generic_link_hash_table_free (hash);
3476 }
3477
3478 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3479
3480 void
3481 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3482 {
3483 struct ppc_link_hash_table *htab;
3484
3485 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3486
3487 /* Always hook our dynamic sections into the first bfd, which is the
3488 linker created stub bfd. This ensures that the GOT header is at
3489 the start of the output TOC section. */
3490 htab = ppc_hash_table (info);
3491 htab->stub_bfd = abfd;
3492 htab->elf.dynobj = abfd;
3493 }
3494
3495 /* Build a name for an entry in the stub hash table. */
3496
3497 static char *
3498 ppc_stub_name (const asection *input_section,
3499 const asection *sym_sec,
3500 const struct ppc_link_hash_entry *h,
3501 const Elf_Internal_Rela *rel)
3502 {
3503 char *stub_name;
3504 bfd_size_type len;
3505
3506 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3507 offsets from a sym as a branch target? In fact, we could
3508 probably assume the addend is always zero. */
3509 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3510
3511 if (h)
3512 {
3513 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3514 stub_name = bfd_malloc (len);
3515 if (stub_name != NULL)
3516 {
3517 sprintf (stub_name, "%08x.%s+%x",
3518 input_section->id & 0xffffffff,
3519 h->elf.root.root.string,
3520 (int) rel->r_addend & 0xffffffff);
3521 }
3522 }
3523 else
3524 {
3525 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3526 stub_name = bfd_malloc (len);
3527 if (stub_name != NULL)
3528 {
3529 sprintf (stub_name, "%08x.%x:%x+%x",
3530 input_section->id & 0xffffffff,
3531 sym_sec->id & 0xffffffff,
3532 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3533 (int) rel->r_addend & 0xffffffff);
3534 }
3535 }
3536 return stub_name;
3537 }
3538
3539 /* Look up an entry in the stub hash. Stub entries are cached because
3540 creating the stub name takes a bit of time. */
3541
3542 static struct ppc_stub_hash_entry *
3543 ppc_get_stub_entry (const asection *input_section,
3544 const asection *sym_sec,
3545 struct ppc_link_hash_entry *h,
3546 const Elf_Internal_Rela *rel,
3547 struct ppc_link_hash_table *htab)
3548 {
3549 struct ppc_stub_hash_entry *stub_entry;
3550 const asection *id_sec;
3551
3552 /* If this input section is part of a group of sections sharing one
3553 stub section, then use the id of the first section in the group.
3554 Stub names need to include a section id, as there may well be
3555 more than one stub used to reach say, printf, and we need to
3556 distinguish between them. */
3557 id_sec = htab->stub_group[input_section->id].link_sec;
3558
3559 if (h != NULL && h->stub_cache != NULL
3560 && h->stub_cache->h == h
3561 && h->stub_cache->id_sec == id_sec)
3562 {
3563 stub_entry = h->stub_cache;
3564 }
3565 else
3566 {
3567 char *stub_name;
3568
3569 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3570 if (stub_name == NULL)
3571 return NULL;
3572
3573 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3574 stub_name, FALSE, FALSE);
3575 if (h != NULL)
3576 h->stub_cache = stub_entry;
3577
3578 free (stub_name);
3579 }
3580
3581 return stub_entry;
3582 }
3583
3584 /* Add a new stub entry to the stub hash. Not all fields of the new
3585 stub entry are initialised. */
3586
3587 static struct ppc_stub_hash_entry *
3588 ppc_add_stub (const char *stub_name,
3589 asection *section,
3590 struct ppc_link_hash_table *htab)
3591 {
3592 asection *link_sec;
3593 asection *stub_sec;
3594 struct ppc_stub_hash_entry *stub_entry;
3595
3596 link_sec = htab->stub_group[section->id].link_sec;
3597 stub_sec = htab->stub_group[section->id].stub_sec;
3598 if (stub_sec == NULL)
3599 {
3600 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3601 if (stub_sec == NULL)
3602 {
3603 size_t namelen;
3604 bfd_size_type len;
3605 char *s_name;
3606
3607 namelen = strlen (link_sec->name);
3608 len = namelen + sizeof (STUB_SUFFIX);
3609 s_name = bfd_alloc (htab->stub_bfd, len);
3610 if (s_name == NULL)
3611 return NULL;
3612
3613 memcpy (s_name, link_sec->name, namelen);
3614 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3615 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3616 if (stub_sec == NULL)
3617 return NULL;
3618 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3619 }
3620 htab->stub_group[section->id].stub_sec = stub_sec;
3621 }
3622
3623 /* Enter this entry into the linker stub hash table. */
3624 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3625 TRUE, FALSE);
3626 if (stub_entry == NULL)
3627 {
3628 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3629 section->owner, stub_name);
3630 return NULL;
3631 }
3632
3633 stub_entry->stub_sec = stub_sec;
3634 stub_entry->stub_offset = 0;
3635 stub_entry->id_sec = link_sec;
3636 return stub_entry;
3637 }
3638
3639 /* Create sections for linker generated code. */
3640
3641 static bfd_boolean
3642 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3643 {
3644 struct ppc_link_hash_table *htab;
3645 flagword flags;
3646
3647 htab = ppc_hash_table (info);
3648
3649 /* Create .sfpr for code to save and restore fp regs. */
3650 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3651 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3652 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3653 if (htab->sfpr == NULL
3654 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3655 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3656 return FALSE;
3657
3658 /* Create .glink for lazy dynamic linking support. */
3659 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3660 if (htab->glink == NULL
3661 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3662 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3663 return FALSE;
3664
3665 /* Create .branch_lt for plt_branch stubs. */
3666 flags = (SEC_ALLOC | SEC_LOAD
3667 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3668 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3669 if (htab->brlt == NULL
3670 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3671 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3672 return FALSE;
3673
3674 if (info->shared)
3675 {
3676 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3677 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3678 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3679 if (!htab->relbrlt
3680 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3681 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3682 return FALSE;
3683 }
3684 return TRUE;
3685 }
3686
3687 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3688 not already done. */
3689
3690 static bfd_boolean
3691 create_got_section (bfd *abfd, struct bfd_link_info *info)
3692 {
3693 asection *got, *relgot;
3694 flagword flags;
3695 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3696
3697 if (!htab->got)
3698 {
3699 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3700 return FALSE;
3701
3702 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3703 if (!htab->got)
3704 abort ();
3705 }
3706
3707 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3708 | SEC_LINKER_CREATED);
3709
3710 got = bfd_make_section (abfd, ".got");
3711 if (!got
3712 || !bfd_set_section_flags (abfd, got, flags)
3713 || !bfd_set_section_alignment (abfd, got, 3))
3714 return FALSE;
3715
3716 relgot = bfd_make_section (abfd, ".rela.got");
3717 if (!relgot
3718 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3719 || ! bfd_set_section_alignment (abfd, relgot, 3))
3720 return FALSE;
3721
3722 ppc64_elf_tdata (abfd)->got = got;
3723 ppc64_elf_tdata (abfd)->relgot = relgot;
3724 return TRUE;
3725 }
3726
3727 /* Create the dynamic sections, and set up shortcuts. */
3728
3729 static bfd_boolean
3730 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3731 {
3732 struct ppc_link_hash_table *htab;
3733
3734 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3735 return FALSE;
3736
3737 htab = ppc_hash_table (info);
3738 if (!htab->got)
3739 htab->got = bfd_get_section_by_name (dynobj, ".got");
3740 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3741 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3742 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3743 if (!info->shared)
3744 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3745
3746 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3747 || (!info->shared && !htab->relbss))
3748 abort ();
3749
3750 return TRUE;
3751 }
3752
3753 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3754
3755 static void
3756 ppc64_elf_copy_indirect_symbol
3757 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3758 struct elf_link_hash_entry *dir,
3759 struct elf_link_hash_entry *ind)
3760 {
3761 struct ppc_link_hash_entry *edir, *eind;
3762 flagword mask;
3763
3764 edir = (struct ppc_link_hash_entry *) dir;
3765 eind = (struct ppc_link_hash_entry *) ind;
3766
3767 /* Copy over any dynamic relocs we may have on the indirect sym. */
3768 if (eind->dyn_relocs != NULL)
3769 {
3770 if (edir->dyn_relocs != NULL)
3771 {
3772 struct ppc_dyn_relocs **pp;
3773 struct ppc_dyn_relocs *p;
3774
3775 if (eind->elf.root.type == bfd_link_hash_indirect)
3776 abort ();
3777
3778 /* Add reloc counts against the weak sym to the strong sym
3779 list. Merge any entries against the same section. */
3780 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3781 {
3782 struct ppc_dyn_relocs *q;
3783
3784 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3785 if (q->sec == p->sec)
3786 {
3787 q->pc_count += p->pc_count;
3788 q->count += p->count;
3789 *pp = p->next;
3790 break;
3791 }
3792 if (q == NULL)
3793 pp = &p->next;
3794 }
3795 *pp = edir->dyn_relocs;
3796 }
3797
3798 edir->dyn_relocs = eind->dyn_relocs;
3799 eind->dyn_relocs = NULL;
3800 }
3801
3802 edir->is_func |= eind->is_func;
3803 edir->is_func_descriptor |= eind->is_func_descriptor;
3804 edir->tls_mask |= eind->tls_mask;
3805
3806 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3807 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3808 | ELF_LINK_HASH_NEEDS_PLT);
3809 /* If called to transfer flags for a weakdef during processing
3810 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3811 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3812 if (ELIMINATE_COPY_RELOCS
3813 && eind->elf.root.type != bfd_link_hash_indirect
3814 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3815 mask &= ~ELF_LINK_NON_GOT_REF;
3816
3817 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3818
3819 /* If we were called to copy over info for a weak sym, that's all. */
3820 if (eind->elf.root.type != bfd_link_hash_indirect)
3821 return;
3822
3823 /* Copy over got entries that we may have already seen to the
3824 symbol which just became indirect. */
3825 if (eind->elf.got.glist != NULL)
3826 {
3827 if (edir->elf.got.glist != NULL)
3828 {
3829 struct got_entry **entp;
3830 struct got_entry *ent;
3831
3832 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3833 {
3834 struct got_entry *dent;
3835
3836 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3837 if (dent->addend == ent->addend
3838 && dent->owner == ent->owner
3839 && dent->tls_type == ent->tls_type)
3840 {
3841 dent->got.refcount += ent->got.refcount;
3842 *entp = ent->next;
3843 break;
3844 }
3845 if (dent == NULL)
3846 entp = &ent->next;
3847 }
3848 *entp = edir->elf.got.glist;
3849 }
3850
3851 edir->elf.got.glist = eind->elf.got.glist;
3852 eind->elf.got.glist = NULL;
3853 }
3854
3855 /* And plt entries. */
3856 if (eind->elf.plt.plist != NULL)
3857 {
3858 if (edir->elf.plt.plist != NULL)
3859 {
3860 struct plt_entry **entp;
3861 struct plt_entry *ent;
3862
3863 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3864 {
3865 struct plt_entry *dent;
3866
3867 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3868 if (dent->addend == ent->addend)
3869 {
3870 dent->plt.refcount += ent->plt.refcount;
3871 *entp = ent->next;
3872 break;
3873 }
3874 if (dent == NULL)
3875 entp = &ent->next;
3876 }
3877 *entp = edir->elf.plt.plist;
3878 }
3879
3880 edir->elf.plt.plist = eind->elf.plt.plist;
3881 eind->elf.plt.plist = NULL;
3882 }
3883
3884 if (edir->elf.dynindx == -1)
3885 {
3886 edir->elf.dynindx = eind->elf.dynindx;
3887 edir->elf.dynstr_index = eind->elf.dynstr_index;
3888 eind->elf.dynindx = -1;
3889 eind->elf.dynstr_index = 0;
3890 }
3891 else
3892 BFD_ASSERT (eind->elf.dynindx == -1);
3893 }
3894
3895 /* Find the function descriptor hash entry from the given function code
3896 hash entry FH. Link the entries via their OH fields. */
3897
3898 static struct ppc_link_hash_entry *
3899 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3900 {
3901 struct ppc_link_hash_entry *fdh = fh->oh;
3902
3903 if (fdh == NULL)
3904 {
3905 const char *fd_name = fh->elf.root.root.string + 1;
3906
3907 fdh = (struct ppc_link_hash_entry *)
3908 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3909 if (fdh != NULL)
3910 {
3911 fdh->is_func_descriptor = 1;
3912 fdh->oh = fh;
3913 fh->is_func = 1;
3914 fh->oh = fdh;
3915 }
3916 }
3917
3918 return fdh;
3919 }
3920
3921 /* Hacks to support old ABI code.
3922 When making function calls, old ABI code references function entry
3923 points (dot symbols), while new ABI code references the function
3924 descriptor symbol. We need to make any combination of reference and
3925 definition work together, without breaking archive linking.
3926
3927 For a defined function "foo" and an undefined call to "bar":
3928 An old object defines "foo" and ".foo", references ".bar" (possibly
3929 "bar" too).
3930 A new object defines "foo" and references "bar".
3931
3932 A new object thus has no problem with its undefined symbols being
3933 satisfied by definitions in an old object. On the other hand, the
3934 old object won't have ".bar" satisfied by a new object. */
3935
3936 /* Fix function descriptor symbols defined in .opd sections to be
3937 function type. */
3938
3939 static bfd_boolean
3940 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3941 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3942 Elf_Internal_Sym *isym,
3943 const char **name ATTRIBUTE_UNUSED,
3944 flagword *flags ATTRIBUTE_UNUSED,
3945 asection **sec,
3946 bfd_vma *value ATTRIBUTE_UNUSED)
3947 {
3948 if (*sec != NULL
3949 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3950 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3951 return TRUE;
3952 }
3953
3954 /* This function makes an old ABI object reference to ".bar" cause the
3955 inclusion of a new ABI object archive that defines "bar". */
3956
3957 static struct elf_link_hash_entry *
3958 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3959 struct bfd_link_info *info,
3960 const char *name)
3961 {
3962 struct elf_link_hash_entry *h;
3963 char *dot_name;
3964 size_t len;
3965
3966 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3967 if (h != NULL)
3968 return h;
3969
3970 if (name[0] == '.')
3971 return h;
3972
3973 len = strlen (name);
3974 dot_name = bfd_alloc (abfd, len + 2);
3975 if (dot_name == NULL)
3976 return (struct elf_link_hash_entry *) 0 - 1;
3977 dot_name[0] = '.';
3978 memcpy (dot_name + 1, name, len + 1);
3979 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3980 bfd_release (abfd, dot_name);
3981 return h;
3982 }
3983
3984 /* This function satisfies all old ABI object references to ".bar" if a
3985 new ABI object defines "bar". Well, at least, undefined dot symbols
3986 are made weak. This stops later archive searches from including an
3987 object if we already have a function descriptor definition. It also
3988 prevents the linker complaining about undefined symbols.
3989 We also check and correct mismatched symbol visibility here. The
3990 most restrictive visibility of the function descriptor and the
3991 function entry symbol is used. */
3992
3993 static bfd_boolean
3994 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
3995 {
3996 struct bfd_link_info *info;
3997 struct ppc_link_hash_table *htab;
3998 struct ppc_link_hash_entry *eh;
3999 struct ppc_link_hash_entry *fdh;
4000
4001 if (h->root.type == bfd_link_hash_indirect)
4002 return TRUE;
4003
4004 if (h->root.type == bfd_link_hash_warning)
4005 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4006
4007 if (h->root.root.string[0] != '.')
4008 return TRUE;
4009
4010 info = inf;
4011 htab = ppc_hash_table (info);
4012 eh = (struct ppc_link_hash_entry *) h;
4013 fdh = get_fdh (eh, htab);
4014 if (fdh != NULL)
4015 {
4016 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4017 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4018 if (entry_vis < descr_vis)
4019 fdh->elf.other += entry_vis - descr_vis;
4020 else if (entry_vis > descr_vis)
4021 eh->elf.other += descr_vis - entry_vis;
4022
4023 if (eh->elf.root.type == bfd_link_hash_undefined)
4024 {
4025 eh->elf.root.type = bfd_link_hash_undefweak;
4026 eh->was_undefined = 1;
4027 htab->twiddled_syms = 1;
4028 }
4029 }
4030
4031 return TRUE;
4032 }
4033
4034 static bfd_boolean
4035 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4036 struct bfd_link_info *info)
4037 {
4038 struct ppc_link_hash_table *htab;
4039
4040 htab = ppc_hash_table (info);
4041 if (!is_ppc64_target (htab->elf.root.creator))
4042 return TRUE;
4043
4044 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, info);
4045
4046 /* We need to fix the undefs list for any syms we have twiddled to
4047 undef_weak. */
4048 if (htab->twiddled_syms)
4049 {
4050 struct bfd_link_hash_entry **pun;
4051
4052 pun = &htab->elf.root.undefs;
4053 while (*pun != NULL)
4054 {
4055 struct bfd_link_hash_entry *h = *pun;
4056
4057 if (h->type != bfd_link_hash_undefined
4058 && h->type != bfd_link_hash_common)
4059 {
4060 *pun = h->und_next;
4061 h->und_next = NULL;
4062 if (h == htab->elf.root.undefs_tail)
4063 {
4064 if (pun == &htab->elf.root.undefs)
4065 htab->elf.root.undefs_tail = NULL;
4066 else
4067 /* pun points at an und_next field. Go back to
4068 the start of the link_hash_entry. */
4069 htab->elf.root.undefs_tail = (struct bfd_link_hash_entry *)
4070 ((char *) pun - ((char *) &h->und_next - (char *) h));
4071 break;
4072 }
4073 }
4074 else
4075 pun = &h->und_next;
4076 }
4077
4078 htab->twiddled_syms = 0;
4079 }
4080 return TRUE;
4081 }
4082
4083 static bfd_boolean
4084 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4085 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4086 {
4087 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4088 char *local_got_tls_masks;
4089
4090 if (local_got_ents == NULL)
4091 {
4092 bfd_size_type size = symtab_hdr->sh_info;
4093
4094 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4095 local_got_ents = bfd_zalloc (abfd, size);
4096 if (local_got_ents == NULL)
4097 return FALSE;
4098 elf_local_got_ents (abfd) = local_got_ents;
4099 }
4100
4101 if ((tls_type & TLS_EXPLICIT) == 0)
4102 {
4103 struct got_entry *ent;
4104
4105 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4106 if (ent->addend == r_addend
4107 && ent->owner == abfd
4108 && ent->tls_type == tls_type)
4109 break;
4110 if (ent == NULL)
4111 {
4112 bfd_size_type amt = sizeof (*ent);
4113 ent = bfd_alloc (abfd, amt);
4114 if (ent == NULL)
4115 return FALSE;
4116 ent->next = local_got_ents[r_symndx];
4117 ent->addend = r_addend;
4118 ent->owner = abfd;
4119 ent->tls_type = tls_type;
4120 ent->got.refcount = 0;
4121 local_got_ents[r_symndx] = ent;
4122 }
4123 ent->got.refcount += 1;
4124 }
4125
4126 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4127 local_got_tls_masks[r_symndx] |= tls_type;
4128 return TRUE;
4129 }
4130
4131 static bfd_boolean
4132 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4133 {
4134 struct plt_entry *ent;
4135
4136 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4137 if (ent->addend == addend)
4138 break;
4139 if (ent == NULL)
4140 {
4141 bfd_size_type amt = sizeof (*ent);
4142 ent = bfd_alloc (abfd, amt);
4143 if (ent == NULL)
4144 return FALSE;
4145 ent->next = eh->elf.plt.plist;
4146 ent->addend = addend;
4147 ent->plt.refcount = 0;
4148 eh->elf.plt.plist = ent;
4149 }
4150 ent->plt.refcount += 1;
4151 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4152 eh->is_func = 1;
4153 return TRUE;
4154 }
4155
4156 /* Look through the relocs for a section during the first phase, and
4157 calculate needed space in the global offset table, procedure
4158 linkage table, and dynamic reloc sections. */
4159
4160 static bfd_boolean
4161 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4162 asection *sec, const Elf_Internal_Rela *relocs)
4163 {
4164 struct ppc_link_hash_table *htab;
4165 Elf_Internal_Shdr *symtab_hdr;
4166 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4167 const Elf_Internal_Rela *rel;
4168 const Elf_Internal_Rela *rel_end;
4169 asection *sreloc;
4170 asection **opd_sym_map;
4171
4172 if (info->relocatable)
4173 return TRUE;
4174
4175 /* Don't do anything special with non-loaded, non-alloced sections.
4176 In particular, any relocs in such sections should not affect GOT
4177 and PLT reference counting (ie. we don't allow them to create GOT
4178 or PLT entries), there's no possibility or desire to optimize TLS
4179 relocs, and there's not much point in propagating relocs to shared
4180 libs that the dynamic linker won't relocate. */
4181 if ((sec->flags & SEC_ALLOC) == 0)
4182 return TRUE;
4183
4184 htab = ppc_hash_table (info);
4185 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4186
4187 sym_hashes = elf_sym_hashes (abfd);
4188 sym_hashes_end = (sym_hashes
4189 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4190 - symtab_hdr->sh_info);
4191
4192 sreloc = NULL;
4193 opd_sym_map = NULL;
4194 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4195 {
4196 /* Garbage collection needs some extra help with .opd sections.
4197 We don't want to necessarily keep everything referenced by
4198 relocs in .opd, as that would keep all functions. Instead,
4199 if we reference an .opd symbol (a function descriptor), we
4200 want to keep the function code symbol's section. This is
4201 easy for global symbols, but for local syms we need to keep
4202 information about the associated function section. Later, if
4203 edit_opd deletes entries, we'll use this array to adjust
4204 local syms in .opd. */
4205 union opd_info {
4206 asection *func_section;
4207 long entry_adjust;
4208 };
4209 bfd_size_type amt;
4210
4211 amt = sec->size * sizeof (union opd_info) / 8;
4212 opd_sym_map = bfd_zalloc (abfd, amt);
4213 if (opd_sym_map == NULL)
4214 return FALSE;
4215 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4216 }
4217
4218 if (htab->sfpr == NULL
4219 && !create_linkage_sections (htab->elf.dynobj, info))
4220 return FALSE;
4221
4222 rel_end = relocs + sec->reloc_count;
4223 for (rel = relocs; rel < rel_end; rel++)
4224 {
4225 unsigned long r_symndx;
4226 struct elf_link_hash_entry *h;
4227 enum elf_ppc64_reloc_type r_type;
4228 int tls_type = 0;
4229
4230 r_symndx = ELF64_R_SYM (rel->r_info);
4231 if (r_symndx < symtab_hdr->sh_info)
4232 h = NULL;
4233 else
4234 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4235
4236 r_type = ELF64_R_TYPE (rel->r_info);
4237 switch (r_type)
4238 {
4239 case R_PPC64_GOT_TLSLD16:
4240 case R_PPC64_GOT_TLSLD16_LO:
4241 case R_PPC64_GOT_TLSLD16_HI:
4242 case R_PPC64_GOT_TLSLD16_HA:
4243 ppc64_tlsld_got (abfd)->refcount += 1;
4244 tls_type = TLS_TLS | TLS_LD;
4245 goto dogottls;
4246
4247 case R_PPC64_GOT_TLSGD16:
4248 case R_PPC64_GOT_TLSGD16_LO:
4249 case R_PPC64_GOT_TLSGD16_HI:
4250 case R_PPC64_GOT_TLSGD16_HA:
4251 tls_type = TLS_TLS | TLS_GD;
4252 goto dogottls;
4253
4254 case R_PPC64_GOT_TPREL16_DS:
4255 case R_PPC64_GOT_TPREL16_LO_DS:
4256 case R_PPC64_GOT_TPREL16_HI:
4257 case R_PPC64_GOT_TPREL16_HA:
4258 if (info->shared)
4259 info->flags |= DF_STATIC_TLS;
4260 tls_type = TLS_TLS | TLS_TPREL;
4261 goto dogottls;
4262
4263 case R_PPC64_GOT_DTPREL16_DS:
4264 case R_PPC64_GOT_DTPREL16_LO_DS:
4265 case R_PPC64_GOT_DTPREL16_HI:
4266 case R_PPC64_GOT_DTPREL16_HA:
4267 tls_type = TLS_TLS | TLS_DTPREL;
4268 dogottls:
4269 sec->has_tls_reloc = 1;
4270 /* Fall thru */
4271
4272 case R_PPC64_GOT16:
4273 case R_PPC64_GOT16_DS:
4274 case R_PPC64_GOT16_HA:
4275 case R_PPC64_GOT16_HI:
4276 case R_PPC64_GOT16_LO:
4277 case R_PPC64_GOT16_LO_DS:
4278 /* This symbol requires a global offset table entry. */
4279 sec->has_gp_reloc = 1;
4280 if (ppc64_elf_tdata (abfd)->got == NULL
4281 && !create_got_section (abfd, info))
4282 return FALSE;
4283
4284 if (h != NULL)
4285 {
4286 struct ppc_link_hash_entry *eh;
4287 struct got_entry *ent;
4288
4289 eh = (struct ppc_link_hash_entry *) h;
4290 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4291 if (ent->addend == rel->r_addend
4292 && ent->owner == abfd
4293 && ent->tls_type == tls_type)
4294 break;
4295 if (ent == NULL)
4296 {
4297 bfd_size_type amt = sizeof (*ent);
4298 ent = bfd_alloc (abfd, amt);
4299 if (ent == NULL)
4300 return FALSE;
4301 ent->next = eh->elf.got.glist;
4302 ent->addend = rel->r_addend;
4303 ent->owner = abfd;
4304 ent->tls_type = tls_type;
4305 ent->got.refcount = 0;
4306 eh->elf.got.glist = ent;
4307 }
4308 ent->got.refcount += 1;
4309 eh->tls_mask |= tls_type;
4310 }
4311 else
4312 /* This is a global offset table entry for a local symbol. */
4313 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4314 rel->r_addend, tls_type))
4315 return FALSE;
4316 break;
4317
4318 case R_PPC64_PLT16_HA:
4319 case R_PPC64_PLT16_HI:
4320 case R_PPC64_PLT16_LO:
4321 case R_PPC64_PLT32:
4322 case R_PPC64_PLT64:
4323 /* This symbol requires a procedure linkage table entry. We
4324 actually build the entry in adjust_dynamic_symbol,
4325 because this might be a case of linking PIC code without
4326 linking in any dynamic objects, in which case we don't
4327 need to generate a procedure linkage table after all. */
4328 if (h == NULL)
4329 {
4330 /* It does not make sense to have a procedure linkage
4331 table entry for a local symbol. */
4332 bfd_set_error (bfd_error_bad_value);
4333 return FALSE;
4334 }
4335 else
4336 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4337 rel->r_addend))
4338 return FALSE;
4339 break;
4340
4341 /* The following relocations don't need to propagate the
4342 relocation if linking a shared object since they are
4343 section relative. */
4344 case R_PPC64_SECTOFF:
4345 case R_PPC64_SECTOFF_LO:
4346 case R_PPC64_SECTOFF_HI:
4347 case R_PPC64_SECTOFF_HA:
4348 case R_PPC64_SECTOFF_DS:
4349 case R_PPC64_SECTOFF_LO_DS:
4350 case R_PPC64_DTPREL16:
4351 case R_PPC64_DTPREL16_LO:
4352 case R_PPC64_DTPREL16_HI:
4353 case R_PPC64_DTPREL16_HA:
4354 case R_PPC64_DTPREL16_DS:
4355 case R_PPC64_DTPREL16_LO_DS:
4356 case R_PPC64_DTPREL16_HIGHER:
4357 case R_PPC64_DTPREL16_HIGHERA:
4358 case R_PPC64_DTPREL16_HIGHEST:
4359 case R_PPC64_DTPREL16_HIGHESTA:
4360 break;
4361
4362 /* Nor do these. */
4363 case R_PPC64_TOC16:
4364 case R_PPC64_TOC16_LO:
4365 case R_PPC64_TOC16_HI:
4366 case R_PPC64_TOC16_HA:
4367 case R_PPC64_TOC16_DS:
4368 case R_PPC64_TOC16_LO_DS:
4369 sec->has_gp_reloc = 1;
4370 break;
4371
4372 /* This relocation describes the C++ object vtable hierarchy.
4373 Reconstruct it for later use during GC. */
4374 case R_PPC64_GNU_VTINHERIT:
4375 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4376 return FALSE;
4377 break;
4378
4379 /* This relocation describes which C++ vtable entries are actually
4380 used. Record for later use during GC. */
4381 case R_PPC64_GNU_VTENTRY:
4382 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4383 return FALSE;
4384 break;
4385
4386 case R_PPC64_REL14:
4387 case R_PPC64_REL14_BRTAKEN:
4388 case R_PPC64_REL14_BRNTAKEN:
4389 htab->has_14bit_branch = 1;
4390 /* Fall through. */
4391
4392 case R_PPC64_REL24:
4393 if (h != NULL)
4394 {
4395 /* We may need a .plt entry if the function this reloc
4396 refers to is in a shared lib. */
4397 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4398 rel->r_addend))
4399 return FALSE;
4400 if (h == &htab->tls_get_addr->elf
4401 || h == &htab->tls_get_addr_fd->elf)
4402 sec->has_tls_reloc = 1;
4403 else if (htab->tls_get_addr == NULL
4404 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4405 && (h->root.root.string[15] == 0
4406 || h->root.root.string[15] == '@'))
4407 {
4408 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4409 sec->has_tls_reloc = 1;
4410 }
4411 else if (htab->tls_get_addr_fd == NULL
4412 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4413 && (h->root.root.string[14] == 0
4414 || h->root.root.string[14] == '@'))
4415 {
4416 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4417 sec->has_tls_reloc = 1;
4418 }
4419 }
4420 break;
4421
4422 case R_PPC64_TPREL64:
4423 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4424 if (info->shared)
4425 info->flags |= DF_STATIC_TLS;
4426 goto dotlstoc;
4427
4428 case R_PPC64_DTPMOD64:
4429 if (rel + 1 < rel_end
4430 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4431 && rel[1].r_offset == rel->r_offset + 8)
4432 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4433 else
4434 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4435 goto dotlstoc;
4436
4437 case R_PPC64_DTPREL64:
4438 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4439 if (rel != relocs
4440 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4441 && rel[-1].r_offset == rel->r_offset - 8)
4442 /* This is the second reloc of a dtpmod, dtprel pair.
4443 Don't mark with TLS_DTPREL. */
4444 goto dodyn;
4445
4446 dotlstoc:
4447 sec->has_tls_reloc = 1;
4448 if (h != NULL)
4449 {
4450 struct ppc_link_hash_entry *eh;
4451 eh = (struct ppc_link_hash_entry *) h;
4452 eh->tls_mask |= tls_type;
4453 }
4454 else
4455 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4456 rel->r_addend, tls_type))
4457 return FALSE;
4458
4459 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4460 {
4461 /* One extra to simplify get_tls_mask. */
4462 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4463 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4464 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4465 return FALSE;
4466 }
4467 BFD_ASSERT (rel->r_offset % 8 == 0);
4468 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4469
4470 /* Mark the second slot of a GD or LD entry.
4471 -1 to indicate GD and -2 to indicate LD. */
4472 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4473 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4474 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4475 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4476 goto dodyn;
4477
4478 case R_PPC64_TPREL16:
4479 case R_PPC64_TPREL16_LO:
4480 case R_PPC64_TPREL16_HI:
4481 case R_PPC64_TPREL16_HA:
4482 case R_PPC64_TPREL16_DS:
4483 case R_PPC64_TPREL16_LO_DS:
4484 case R_PPC64_TPREL16_HIGHER:
4485 case R_PPC64_TPREL16_HIGHERA:
4486 case R_PPC64_TPREL16_HIGHEST:
4487 case R_PPC64_TPREL16_HIGHESTA:
4488 if (info->shared)
4489 {
4490 info->flags |= DF_STATIC_TLS;
4491 goto dodyn;
4492 }
4493 break;
4494
4495 case R_PPC64_ADDR64:
4496 if (opd_sym_map != NULL
4497 && rel + 1 < rel_end
4498 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4499 {
4500 if (h != NULL)
4501 {
4502 if (h->root.root.string[0] == '.'
4503 && h->root.root.string[1] != 0
4504 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4505 ;
4506 else
4507 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4508 }
4509 else
4510 {
4511 asection *s;
4512
4513 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4514 r_symndx);
4515 if (s == NULL)
4516 return FALSE;
4517 else if (s != sec)
4518 opd_sym_map[rel->r_offset / 8] = s;
4519 }
4520 }
4521 /* Fall through. */
4522
4523 case R_PPC64_REL30:
4524 case R_PPC64_REL32:
4525 case R_PPC64_REL64:
4526 case R_PPC64_ADDR14:
4527 case R_PPC64_ADDR14_BRNTAKEN:
4528 case R_PPC64_ADDR14_BRTAKEN:
4529 case R_PPC64_ADDR16:
4530 case R_PPC64_ADDR16_DS:
4531 case R_PPC64_ADDR16_HA:
4532 case R_PPC64_ADDR16_HI:
4533 case R_PPC64_ADDR16_HIGHER:
4534 case R_PPC64_ADDR16_HIGHERA:
4535 case R_PPC64_ADDR16_HIGHEST:
4536 case R_PPC64_ADDR16_HIGHESTA:
4537 case R_PPC64_ADDR16_LO:
4538 case R_PPC64_ADDR16_LO_DS:
4539 case R_PPC64_ADDR24:
4540 case R_PPC64_ADDR32:
4541 case R_PPC64_UADDR16:
4542 case R_PPC64_UADDR32:
4543 case R_PPC64_UADDR64:
4544 case R_PPC64_TOC:
4545 if (h != NULL && !info->shared)
4546 /* We may need a copy reloc. */
4547 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
4548
4549 /* Don't propagate .opd relocs. */
4550 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4551 break;
4552
4553 /* If we are creating a shared library, and this is a reloc
4554 against a global symbol, or a non PC relative reloc
4555 against a local symbol, then we need to copy the reloc
4556 into the shared library. However, if we are linking with
4557 -Bsymbolic, we do not need to copy a reloc against a
4558 global symbol which is defined in an object we are
4559 including in the link (i.e., DEF_REGULAR is set). At
4560 this point we have not seen all the input files, so it is
4561 possible that DEF_REGULAR is not set now but will be set
4562 later (it is never cleared). In case of a weak definition,
4563 DEF_REGULAR may be cleared later by a strong definition in
4564 a shared library. We account for that possibility below by
4565 storing information in the dyn_relocs field of the hash
4566 table entry. A similar situation occurs when creating
4567 shared libraries and symbol visibility changes render the
4568 symbol local.
4569
4570 If on the other hand, we are creating an executable, we
4571 may need to keep relocations for symbols satisfied by a
4572 dynamic library if we manage to avoid copy relocs for the
4573 symbol. */
4574 dodyn:
4575 if ((info->shared
4576 && (MUST_BE_DYN_RELOC (r_type)
4577 || (h != NULL
4578 && (! info->symbolic
4579 || h->root.type == bfd_link_hash_defweak
4580 || (h->elf_link_hash_flags
4581 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4582 || (ELIMINATE_COPY_RELOCS
4583 && !info->shared
4584 && h != NULL
4585 && (h->root.type == bfd_link_hash_defweak
4586 || (h->elf_link_hash_flags
4587 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4588 {
4589 struct ppc_dyn_relocs *p;
4590 struct ppc_dyn_relocs **head;
4591
4592 /* We must copy these reloc types into the output file.
4593 Create a reloc section in dynobj and make room for
4594 this reloc. */
4595 if (sreloc == NULL)
4596 {
4597 const char *name;
4598 bfd *dynobj;
4599
4600 name = (bfd_elf_string_from_elf_section
4601 (abfd,
4602 elf_elfheader (abfd)->e_shstrndx,
4603 elf_section_data (sec)->rel_hdr.sh_name));
4604 if (name == NULL)
4605 return FALSE;
4606
4607 if (strncmp (name, ".rela", 5) != 0
4608 || strcmp (bfd_get_section_name (abfd, sec),
4609 name + 5) != 0)
4610 {
4611 (*_bfd_error_handler)
4612 (_("%B: bad relocation section name `%s\'"),
4613 abfd, name);
4614 bfd_set_error (bfd_error_bad_value);
4615 }
4616
4617 dynobj = htab->elf.dynobj;
4618 sreloc = bfd_get_section_by_name (dynobj, name);
4619 if (sreloc == NULL)
4620 {
4621 flagword flags;
4622
4623 sreloc = bfd_make_section (dynobj, name);
4624 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4625 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4626 if ((sec->flags & SEC_ALLOC) != 0)
4627 flags |= SEC_ALLOC | SEC_LOAD;
4628 if (sreloc == NULL
4629 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4630 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4631 return FALSE;
4632 }
4633 elf_section_data (sec)->sreloc = sreloc;
4634 }
4635
4636 /* If this is a global symbol, we count the number of
4637 relocations we need for this symbol. */
4638 if (h != NULL)
4639 {
4640 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4641 }
4642 else
4643 {
4644 /* Track dynamic relocs needed for local syms too.
4645 We really need local syms available to do this
4646 easily. Oh well. */
4647
4648 asection *s;
4649 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4650 sec, r_symndx);
4651 if (s == NULL)
4652 return FALSE;
4653
4654 head = ((struct ppc_dyn_relocs **)
4655 &elf_section_data (s)->local_dynrel);
4656 }
4657
4658 p = *head;
4659 if (p == NULL || p->sec != sec)
4660 {
4661 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4662 if (p == NULL)
4663 return FALSE;
4664 p->next = *head;
4665 *head = p;
4666 p->sec = sec;
4667 p->count = 0;
4668 p->pc_count = 0;
4669 }
4670
4671 p->count += 1;
4672 if (!MUST_BE_DYN_RELOC (r_type))
4673 p->pc_count += 1;
4674 }
4675 break;
4676
4677 default:
4678 break;
4679 }
4680 }
4681
4682 return TRUE;
4683 }
4684
4685 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4686 of the code entry point, and its section. */
4687
4688 static bfd_vma
4689 opd_entry_value (asection *opd_sec,
4690 bfd_vma offset,
4691 asection **code_sec,
4692 bfd_vma *code_off)
4693 {
4694 bfd *opd_bfd = opd_sec->owner;
4695 Elf_Internal_Rela *lo, *hi, *look;
4696
4697 /* Go find the opd reloc at the sym address. */
4698 lo = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4699 BFD_ASSERT (lo != NULL);
4700 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4701
4702 while (lo < hi)
4703 {
4704 look = lo + (hi - lo) / 2;
4705 if (look->r_offset < offset)
4706 lo = look + 1;
4707 else if (look->r_offset > offset)
4708 hi = look;
4709 else
4710 {
4711 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4712 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4713 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4714 {
4715 unsigned long symndx = ELF64_R_SYM (look->r_info);
4716 bfd_vma val;
4717 asection *sec;
4718
4719 if (symndx < symtab_hdr->sh_info)
4720 {
4721 Elf_Internal_Sym *sym;
4722
4723 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4724 if (sym == NULL)
4725 {
4726 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4727 symtab_hdr->sh_info,
4728 0, NULL, NULL, NULL);
4729 if (sym == NULL)
4730 return (bfd_vma) -1;
4731 symtab_hdr->contents = (bfd_byte *) sym;
4732 }
4733
4734 sym += symndx;
4735 val = sym->st_value;
4736 sec = NULL;
4737 if ((sym->st_shndx != SHN_UNDEF
4738 && sym->st_shndx < SHN_LORESERVE)
4739 || sym->st_shndx > SHN_HIRESERVE)
4740 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4741 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4742 }
4743 else
4744 {
4745 struct elf_link_hash_entry **sym_hashes;
4746 struct elf_link_hash_entry *rh;
4747
4748 sym_hashes = elf_sym_hashes (opd_bfd);
4749 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4750 while (rh->root.type == bfd_link_hash_indirect
4751 || rh->root.type == bfd_link_hash_warning)
4752 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4753 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4754 || rh->root.type == bfd_link_hash_defweak);
4755 val = rh->root.u.def.value;
4756 sec = rh->root.u.def.section;
4757 }
4758 val += look->r_addend;
4759 if (code_off != NULL)
4760 *code_off = val;
4761 if (code_sec != NULL)
4762 *code_sec = sec;
4763 if (sec != NULL && sec->output_section != NULL)
4764 val += sec->output_section->vma + sec->output_offset;
4765 return val;
4766 }
4767 break;
4768 }
4769 }
4770 return (bfd_vma) -1;
4771 }
4772
4773 /* Return the section that should be marked against GC for a given
4774 relocation. */
4775
4776 static asection *
4777 ppc64_elf_gc_mark_hook (asection *sec,
4778 struct bfd_link_info *info,
4779 Elf_Internal_Rela *rel,
4780 struct elf_link_hash_entry *h,
4781 Elf_Internal_Sym *sym)
4782 {
4783 asection *rsec;
4784
4785 /* First mark all our entry sym sections. */
4786 if (info->gc_sym_list != NULL)
4787 {
4788 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4789 struct bfd_sym_chain *sym = info->gc_sym_list;
4790
4791 info->gc_sym_list = NULL;
4792 do
4793 {
4794 struct ppc_link_hash_entry *eh;
4795
4796 eh = (struct ppc_link_hash_entry *)
4797 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4798 if (eh == NULL)
4799 continue;
4800 if (eh->elf.root.type != bfd_link_hash_defined
4801 && eh->elf.root.type != bfd_link_hash_defweak)
4802 continue;
4803
4804 if (eh->is_func_descriptor)
4805 rsec = eh->oh->elf.root.u.def.section;
4806 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4807 && opd_entry_value (eh->elf.root.u.def.section,
4808 eh->elf.root.u.def.value,
4809 &rsec, NULL) != (bfd_vma) -1)
4810 ;
4811 else
4812 continue;
4813
4814 if (!rsec->gc_mark)
4815 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4816
4817 rsec = eh->elf.root.u.def.section;
4818 if (!rsec->gc_mark)
4819 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4820
4821 sym = sym->next;
4822 }
4823 while (sym != NULL);
4824 }
4825
4826 /* Syms return NULL if we're marking .opd, so we avoid marking all
4827 function sections, as all functions are referenced in .opd. */
4828 rsec = NULL;
4829 if (get_opd_info (sec) != NULL)
4830 return rsec;
4831
4832 if (h != NULL)
4833 {
4834 enum elf_ppc64_reloc_type r_type;
4835 struct ppc_link_hash_entry *eh;
4836
4837 r_type = ELF64_R_TYPE (rel->r_info);
4838 switch (r_type)
4839 {
4840 case R_PPC64_GNU_VTINHERIT:
4841 case R_PPC64_GNU_VTENTRY:
4842 break;
4843
4844 default:
4845 switch (h->root.type)
4846 {
4847 case bfd_link_hash_defined:
4848 case bfd_link_hash_defweak:
4849 eh = (struct ppc_link_hash_entry *) h;
4850 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4851 eh = eh->oh;
4852
4853 /* Function descriptor syms cause the associated
4854 function code sym section to be marked. */
4855 if (eh->is_func_descriptor)
4856 {
4857 /* They also mark their opd section. */
4858 if (!eh->elf.root.u.def.section->gc_mark)
4859 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4860 ppc64_elf_gc_mark_hook);
4861
4862 rsec = eh->oh->elf.root.u.def.section;
4863 }
4864 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4865 && opd_entry_value (eh->elf.root.u.def.section,
4866 eh->elf.root.u.def.value,
4867 &rsec, NULL) != (bfd_vma) -1)
4868 {
4869 if (!eh->elf.root.u.def.section->gc_mark)
4870 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4871 ppc64_elf_gc_mark_hook);
4872 }
4873 else
4874 rsec = h->root.u.def.section;
4875 break;
4876
4877 case bfd_link_hash_common:
4878 rsec = h->root.u.c.p->section;
4879 break;
4880
4881 default:
4882 break;
4883 }
4884 }
4885 }
4886 else
4887 {
4888 asection **opd_sym_section;
4889
4890 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4891 opd_sym_section = get_opd_info (rsec);
4892 if (opd_sym_section != NULL)
4893 {
4894 if (!rsec->gc_mark)
4895 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4896
4897 rsec = opd_sym_section[sym->st_value / 8];
4898 }
4899 }
4900
4901 return rsec;
4902 }
4903
4904 /* Update the .got, .plt. and dynamic reloc reference counts for the
4905 section being removed. */
4906
4907 static bfd_boolean
4908 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4909 asection *sec, const Elf_Internal_Rela *relocs)
4910 {
4911 struct ppc_link_hash_table *htab;
4912 Elf_Internal_Shdr *symtab_hdr;
4913 struct elf_link_hash_entry **sym_hashes;
4914 struct got_entry **local_got_ents;
4915 const Elf_Internal_Rela *rel, *relend;
4916
4917 if ((sec->flags & SEC_ALLOC) == 0)
4918 return TRUE;
4919
4920 elf_section_data (sec)->local_dynrel = NULL;
4921
4922 htab = ppc_hash_table (info);
4923 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4924 sym_hashes = elf_sym_hashes (abfd);
4925 local_got_ents = elf_local_got_ents (abfd);
4926
4927 relend = relocs + sec->reloc_count;
4928 for (rel = relocs; rel < relend; rel++)
4929 {
4930 unsigned long r_symndx;
4931 enum elf_ppc64_reloc_type r_type;
4932 struct elf_link_hash_entry *h = NULL;
4933 char tls_type = 0;
4934
4935 r_symndx = ELF64_R_SYM (rel->r_info);
4936 r_type = ELF64_R_TYPE (rel->r_info);
4937 if (r_symndx >= symtab_hdr->sh_info)
4938 {
4939 struct ppc_link_hash_entry *eh;
4940 struct ppc_dyn_relocs **pp;
4941 struct ppc_dyn_relocs *p;
4942
4943 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4944 eh = (struct ppc_link_hash_entry *) h;
4945
4946 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4947 if (p->sec == sec)
4948 {
4949 /* Everything must go for SEC. */
4950 *pp = p->next;
4951 break;
4952 }
4953 }
4954
4955 switch (r_type)
4956 {
4957 case R_PPC64_GOT_TLSLD16:
4958 case R_PPC64_GOT_TLSLD16_LO:
4959 case R_PPC64_GOT_TLSLD16_HI:
4960 case R_PPC64_GOT_TLSLD16_HA:
4961 ppc64_tlsld_got (abfd)->refcount -= 1;
4962 tls_type = TLS_TLS | TLS_LD;
4963 goto dogot;
4964
4965 case R_PPC64_GOT_TLSGD16:
4966 case R_PPC64_GOT_TLSGD16_LO:
4967 case R_PPC64_GOT_TLSGD16_HI:
4968 case R_PPC64_GOT_TLSGD16_HA:
4969 tls_type = TLS_TLS | TLS_GD;
4970 goto dogot;
4971
4972 case R_PPC64_GOT_TPREL16_DS:
4973 case R_PPC64_GOT_TPREL16_LO_DS:
4974 case R_PPC64_GOT_TPREL16_HI:
4975 case R_PPC64_GOT_TPREL16_HA:
4976 tls_type = TLS_TLS | TLS_TPREL;
4977 goto dogot;
4978
4979 case R_PPC64_GOT_DTPREL16_DS:
4980 case R_PPC64_GOT_DTPREL16_LO_DS:
4981 case R_PPC64_GOT_DTPREL16_HI:
4982 case R_PPC64_GOT_DTPREL16_HA:
4983 tls_type = TLS_TLS | TLS_DTPREL;
4984 goto dogot;
4985
4986 case R_PPC64_GOT16:
4987 case R_PPC64_GOT16_DS:
4988 case R_PPC64_GOT16_HA:
4989 case R_PPC64_GOT16_HI:
4990 case R_PPC64_GOT16_LO:
4991 case R_PPC64_GOT16_LO_DS:
4992 dogot:
4993 {
4994 struct got_entry *ent;
4995
4996 if (h != NULL)
4997 ent = h->got.glist;
4998 else
4999 ent = local_got_ents[r_symndx];
5000
5001 for (; ent != NULL; ent = ent->next)
5002 if (ent->addend == rel->r_addend
5003 && ent->owner == abfd
5004 && ent->tls_type == tls_type)
5005 break;
5006 if (ent == NULL)
5007 abort ();
5008 if (ent->got.refcount > 0)
5009 ent->got.refcount -= 1;
5010 }
5011 break;
5012
5013 case R_PPC64_PLT16_HA:
5014 case R_PPC64_PLT16_HI:
5015 case R_PPC64_PLT16_LO:
5016 case R_PPC64_PLT32:
5017 case R_PPC64_PLT64:
5018 case R_PPC64_REL14:
5019 case R_PPC64_REL14_BRNTAKEN:
5020 case R_PPC64_REL14_BRTAKEN:
5021 case R_PPC64_REL24:
5022 if (h != NULL)
5023 {
5024 struct plt_entry *ent;
5025
5026 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5027 if (ent->addend == rel->r_addend)
5028 break;
5029 if (ent == NULL)
5030 abort ();
5031 if (ent->plt.refcount > 0)
5032 ent->plt.refcount -= 1;
5033 }
5034 break;
5035
5036 default:
5037 break;
5038 }
5039 }
5040 return TRUE;
5041 }
5042
5043 /* The maximum size of .sfpr. */
5044 #define SFPR_MAX (218*4)
5045
5046 struct sfpr_def_parms
5047 {
5048 const char name[12];
5049 unsigned char lo, hi;
5050 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5051 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5052 };
5053
5054 /* Auto-generate _save*, _rest* functions in .sfpr. */
5055
5056 static unsigned int
5057 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5058 {
5059 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5060 unsigned int i;
5061 size_t len = strlen (parm->name);
5062 bfd_boolean writing = FALSE;
5063 char sym[16];
5064
5065 memcpy (sym, parm->name, len);
5066 sym[len + 2] = 0;
5067
5068 for (i = parm->lo; i <= parm->hi; i++)
5069 {
5070 struct elf_link_hash_entry *h;
5071
5072 sym[len + 0] = i / 10 + '0';
5073 sym[len + 1] = i % 10 + '0';
5074 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5075 if (h != NULL
5076 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5077 {
5078 h->root.type = bfd_link_hash_defined;
5079 h->root.u.def.section = htab->sfpr;
5080 h->root.u.def.value = htab->sfpr->size;
5081 h->type = STT_FUNC;
5082 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
5083 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5084 writing = TRUE;
5085 if (htab->sfpr->contents == NULL)
5086 {
5087 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5088 if (htab->sfpr->contents == NULL)
5089 return FALSE;
5090 }
5091 }
5092 if (writing)
5093 {
5094 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5095 if (i != parm->hi)
5096 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5097 else
5098 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5099 htab->sfpr->size = p - htab->sfpr->contents;
5100 }
5101 }
5102
5103 return TRUE;
5104 }
5105
5106 static bfd_byte *
5107 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5108 {
5109 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5110 return p + 4;
5111 }
5112
5113 static bfd_byte *
5114 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5115 {
5116 p = savegpr0 (abfd, p, r);
5117 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5118 p = p + 4;
5119 bfd_put_32 (abfd, BLR, p);
5120 return p + 4;
5121 }
5122
5123 static bfd_byte *
5124 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5125 {
5126 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5127 return p + 4;
5128 }
5129
5130 static bfd_byte *
5131 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5132 {
5133 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5134 p = p + 4;
5135 p = restgpr0 (abfd, p, r);
5136 bfd_put_32 (abfd, MTLR_R0, p);
5137 p = p + 4;
5138 if (r == 29)
5139 {
5140 p = restgpr0 (abfd, p, 30);
5141 p = restgpr0 (abfd, p, 31);
5142 }
5143 bfd_put_32 (abfd, BLR, p);
5144 return p + 4;
5145 }
5146
5147 static bfd_byte *
5148 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5149 {
5150 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5151 return p + 4;
5152 }
5153
5154 static bfd_byte *
5155 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5156 {
5157 p = savegpr1 (abfd, p, r);
5158 bfd_put_32 (abfd, BLR, p);
5159 return p + 4;
5160 }
5161
5162 static bfd_byte *
5163 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5164 {
5165 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5166 return p + 4;
5167 }
5168
5169 static bfd_byte *
5170 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5171 {
5172 p = restgpr1 (abfd, p, r);
5173 bfd_put_32 (abfd, BLR, p);
5174 return p + 4;
5175 }
5176
5177 static bfd_byte *
5178 savefpr (bfd *abfd, bfd_byte *p, int r)
5179 {
5180 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5181 return p + 4;
5182 }
5183
5184 static bfd_byte *
5185 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5186 {
5187 p = savefpr (abfd, p, r);
5188 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5189 p = p + 4;
5190 bfd_put_32 (abfd, BLR, p);
5191 return p + 4;
5192 }
5193
5194 static bfd_byte *
5195 restfpr (bfd *abfd, bfd_byte *p, int r)
5196 {
5197 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5198 return p + 4;
5199 }
5200
5201 static bfd_byte *
5202 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5203 {
5204 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5205 p = p + 4;
5206 p = restfpr (abfd, p, r);
5207 bfd_put_32 (abfd, MTLR_R0, p);
5208 p = p + 4;
5209 if (r == 29)
5210 {
5211 p = restfpr (abfd, p, 30);
5212 p = restfpr (abfd, p, 31);
5213 }
5214 bfd_put_32 (abfd, BLR, p);
5215 return p + 4;
5216 }
5217
5218 static bfd_byte *
5219 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5220 {
5221 p = savefpr (abfd, p, r);
5222 bfd_put_32 (abfd, BLR, p);
5223 return p + 4;
5224 }
5225
5226 static bfd_byte *
5227 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5228 {
5229 p = restfpr (abfd, p, r);
5230 bfd_put_32 (abfd, BLR, p);
5231 return p + 4;
5232 }
5233
5234 static bfd_byte *
5235 savevr (bfd *abfd, bfd_byte *p, int r)
5236 {
5237 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5238 p = p + 4;
5239 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5240 return p + 4;
5241 }
5242
5243 static bfd_byte *
5244 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5245 {
5246 p = savevr (abfd, p, r);
5247 bfd_put_32 (abfd, BLR, p);
5248 return p + 4;
5249 }
5250
5251 static bfd_byte *
5252 restvr (bfd *abfd, bfd_byte *p, int r)
5253 {
5254 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5255 p = p + 4;
5256 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5257 return p + 4;
5258 }
5259
5260 static bfd_byte *
5261 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5262 {
5263 p = restvr (abfd, p, r);
5264 bfd_put_32 (abfd, BLR, p);
5265 return p + 4;
5266 }
5267
5268 /* Called via elf_link_hash_traverse to transfer dynamic linking
5269 information on function code symbol entries to their corresponding
5270 function descriptor symbol entries. */
5271
5272 static bfd_boolean
5273 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5274 {
5275 struct bfd_link_info *info;
5276 struct ppc_link_hash_table *htab;
5277 struct plt_entry *ent;
5278 struct ppc_link_hash_entry *fh;
5279 struct ppc_link_hash_entry *fdh;
5280 bfd_boolean force_local;
5281
5282 fh = (struct ppc_link_hash_entry *) h;
5283 if (fh->elf.root.type == bfd_link_hash_indirect)
5284 return TRUE;
5285
5286 if (fh->elf.root.type == bfd_link_hash_warning)
5287 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5288
5289 info = inf;
5290 htab = ppc_hash_table (info);
5291
5292 /* Resolve undefined references to dot-symbols as the value
5293 in the function descriptor, if we have one in a regular object.
5294 This is to satisfy cases like ".quad .foo". Calls to functions
5295 in dynamic objects are handled elsewhere. */
5296 if (fh->elf.root.type == bfd_link_hash_undefweak
5297 && fh->was_undefined
5298 && (fh->oh->elf.root.type == bfd_link_hash_defined
5299 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5300 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5301 && opd_entry_value (fh->oh->elf.root.u.def.section,
5302 fh->oh->elf.root.u.def.value,
5303 &fh->elf.root.u.def.section,
5304 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5305 {
5306 fh->elf.root.type = fh->oh->elf.root.type;
5307 fh->elf.elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
5308 }
5309
5310 /* If this is a function code symbol, transfer dynamic linking
5311 information to the function descriptor symbol. */
5312 if (!fh->is_func)
5313 return TRUE;
5314
5315 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5316 if (ent->plt.refcount > 0)
5317 break;
5318 if (ent == NULL
5319 || fh->elf.root.root.string[0] != '.'
5320 || fh->elf.root.root.string[1] == '\0')
5321 return TRUE;
5322
5323 /* Find the corresponding function descriptor symbol. Create it
5324 as undefined if necessary. */
5325
5326 fdh = get_fdh (fh, htab);
5327 if (fdh != NULL)
5328 while (fdh->elf.root.type == bfd_link_hash_indirect
5329 || fdh->elf.root.type == bfd_link_hash_warning)
5330 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5331
5332 if (fdh == NULL
5333 && info->shared
5334 && (fh->elf.root.type == bfd_link_hash_undefined
5335 || fh->elf.root.type == bfd_link_hash_undefweak))
5336 {
5337 bfd *abfd;
5338 asymbol *newsym;
5339 struct bfd_link_hash_entry *bh;
5340
5341 abfd = fh->elf.root.u.undef.abfd;
5342 newsym = bfd_make_empty_symbol (abfd);
5343 newsym->name = fh->elf.root.root.string + 1;
5344 newsym->section = bfd_und_section_ptr;
5345 newsym->value = 0;
5346 newsym->flags = BSF_OBJECT;
5347 if (fh->elf.root.type == bfd_link_hash_undefweak)
5348 newsym->flags |= BSF_WEAK;
5349
5350 bh = &fdh->elf.root;
5351 if ( !(_bfd_generic_link_add_one_symbol
5352 (info, abfd, newsym->name, newsym->flags,
5353 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
5354 {
5355 return FALSE;
5356 }
5357 fdh = (struct ppc_link_hash_entry *) bh;
5358 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
5359 fdh->elf.size = 24;
5360 fdh->elf.type = STT_OBJECT;
5361 }
5362
5363 if (fdh != NULL
5364 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
5365 && (info->shared
5366 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5367 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
5368 || (fdh->elf.root.type == bfd_link_hash_undefweak
5369 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5370 {
5371 if (fdh->elf.dynindx == -1)
5372 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5373 return FALSE;
5374 fdh->elf.elf_link_hash_flags
5375 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
5376 | ELF_LINK_HASH_REF_DYNAMIC
5377 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
5378 | ELF_LINK_NON_GOT_REF));
5379 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5380 {
5381 struct plt_entry **ep = &fdh->elf.plt.plist;
5382 while (*ep != NULL)
5383 ep = &(*ep)->next;
5384 *ep = fh->elf.plt.plist;
5385 fh->elf.plt.plist = NULL;
5386 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
5387 }
5388 fdh->is_func_descriptor = 1;
5389 fdh->oh = fh;
5390 fh->oh = fdh;
5391 }
5392
5393 /* Now that the info is on the function descriptor, clear the
5394 function code sym info. Any function code syms for which we
5395 don't have a definition in a regular file, we force local.
5396 This prevents a shared library from exporting syms that have
5397 been imported from another library. Function code syms that
5398 are really in the library we must leave global to prevent the
5399 linker dragging in a definition from a static library. */
5400 force_local
5401 = (info->shared
5402 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5403 || fdh == NULL
5404 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5405 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
5406 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5407
5408 return TRUE;
5409 }
5410
5411 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5412 this hook to a) provide some gcc support functions, and b) transfer
5413 dynamic linking information gathered so far on function code symbol
5414 entries, to their corresponding function descriptor symbol entries. */
5415
5416 static bfd_boolean
5417 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5418 struct bfd_link_info *info)
5419 {
5420 struct ppc_link_hash_table *htab;
5421 unsigned int i;
5422 const struct sfpr_def_parms funcs[] =
5423 {
5424 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5425 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5426 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5427 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5428 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5429 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5430 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5431 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5432 { "._savef", 14, 31, savefpr, savefpr1_tail },
5433 { "._restf", 14, 31, restfpr, restfpr1_tail },
5434 { "_savevr_", 20, 31, savevr, savevr_tail },
5435 { "_restvr_", 20, 31, restvr, restvr_tail }
5436 };
5437
5438 htab = ppc_hash_table (info);
5439 if (htab->sfpr == NULL)
5440 /* We don't have any relocs. */
5441 return TRUE;
5442
5443 /* Provide any missing _save* and _rest* functions. */
5444 htab->sfpr->size = 0;
5445 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5446 if (!sfpr_define (info, &funcs[i]))
5447 return FALSE;
5448
5449 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5450
5451 if (htab->sfpr->size == 0)
5452 _bfd_strip_section_from_output (info, htab->sfpr);
5453
5454 return TRUE;
5455 }
5456
5457 /* Adjust a symbol defined by a dynamic object and referenced by a
5458 regular object. The current definition is in some section of the
5459 dynamic object, but we're not including those sections. We have to
5460 change the definition to something the rest of the link can
5461 understand. */
5462
5463 static bfd_boolean
5464 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5465 struct elf_link_hash_entry *h)
5466 {
5467 struct ppc_link_hash_table *htab;
5468 asection *s;
5469 unsigned int power_of_two;
5470
5471 htab = ppc_hash_table (info);
5472
5473 /* Deal with function syms. */
5474 if (h->type == STT_FUNC
5475 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
5476 {
5477 /* Clear procedure linkage table information for any symbol that
5478 won't need a .plt entry. */
5479 struct plt_entry *ent;
5480 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5481 if (ent->plt.refcount > 0)
5482 break;
5483 if (ent == NULL
5484 || SYMBOL_CALLS_LOCAL (info, h)
5485 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5486 && h->root.type == bfd_link_hash_undefweak))
5487 {
5488 h->plt.plist = NULL;
5489 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5490 }
5491 }
5492 else
5493 h->plt.plist = NULL;
5494
5495 /* If this is a weak symbol, and there is a real definition, the
5496 processor independent code will have arranged for us to see the
5497 real definition first, and we can just use the same value. */
5498 if (h->weakdef != NULL)
5499 {
5500 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
5501 || h->weakdef->root.type == bfd_link_hash_defweak);
5502 h->root.u.def.section = h->weakdef->root.u.def.section;
5503 h->root.u.def.value = h->weakdef->root.u.def.value;
5504 if (ELIMINATE_COPY_RELOCS)
5505 h->elf_link_hash_flags
5506 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
5507 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
5508 return TRUE;
5509 }
5510
5511 /* If we are creating a shared library, we must presume that the
5512 only references to the symbol are via the global offset table.
5513 For such cases we need not do anything here; the relocations will
5514 be handled correctly by relocate_section. */
5515 if (info->shared)
5516 return TRUE;
5517
5518 /* If there are no references to this symbol that do not use the
5519 GOT, we don't need to generate a copy reloc. */
5520 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
5521 return TRUE;
5522
5523 if (ELIMINATE_COPY_RELOCS)
5524 {
5525 struct ppc_link_hash_entry * eh;
5526 struct ppc_dyn_relocs *p;
5527
5528 eh = (struct ppc_link_hash_entry *) h;
5529 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5530 {
5531 s = p->sec->output_section;
5532 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5533 break;
5534 }
5535
5536 /* If we didn't find any dynamic relocs in read-only sections, then
5537 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5538 if (p == NULL)
5539 {
5540 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
5541 return TRUE;
5542 }
5543 }
5544
5545 if (h->plt.plist != NULL)
5546 {
5547 /* We should never get here, but unfortunately there are versions
5548 of gcc out there that improperly (for this ABI) put initialized
5549 function pointers, vtable refs and suchlike in read-only
5550 sections. Allow them to proceed, but warn that this might
5551 break at runtime. */
5552 (*_bfd_error_handler)
5553 (_("copy reloc against `%s' requires lazy plt linking; "
5554 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5555 h->root.root.string);
5556 }
5557
5558 /* This is a reference to a symbol defined by a dynamic object which
5559 is not a function. */
5560
5561 /* We must allocate the symbol in our .dynbss section, which will
5562 become part of the .bss section of the executable. There will be
5563 an entry for this symbol in the .dynsym section. The dynamic
5564 object will contain position independent code, so all references
5565 from the dynamic object to this symbol will go through the global
5566 offset table. The dynamic linker will use the .dynsym entry to
5567 determine the address it must put in the global offset table, so
5568 both the dynamic object and the regular object will refer to the
5569 same memory location for the variable. */
5570
5571 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5572 to copy the initial value out of the dynamic object and into the
5573 runtime process image. We need to remember the offset into the
5574 .rela.bss section we are going to use. */
5575 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5576 {
5577 htab->relbss->size += sizeof (Elf64_External_Rela);
5578 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
5579 }
5580
5581 /* We need to figure out the alignment required for this symbol. I
5582 have no idea how ELF linkers handle this. */
5583 power_of_two = bfd_log2 (h->size);
5584 if (power_of_two > 4)
5585 power_of_two = 4;
5586
5587 /* Apply the required alignment. */
5588 s = htab->dynbss;
5589 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5590 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5591 {
5592 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5593 return FALSE;
5594 }
5595
5596 /* Define the symbol as being at this point in the section. */
5597 h->root.u.def.section = s;
5598 h->root.u.def.value = s->size;
5599
5600 /* Increment the section size to make room for the symbol. */
5601 s->size += h->size;
5602
5603 return TRUE;
5604 }
5605
5606 /* If given a function descriptor symbol, hide both the function code
5607 sym and the descriptor. */
5608 static void
5609 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5610 struct elf_link_hash_entry *h,
5611 bfd_boolean force_local)
5612 {
5613 struct ppc_link_hash_entry *eh;
5614 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5615
5616 eh = (struct ppc_link_hash_entry *) h;
5617 if (eh->is_func_descriptor)
5618 {
5619 struct ppc_link_hash_entry *fh = eh->oh;
5620
5621 if (fh == NULL)
5622 {
5623 const char *p, *q;
5624 struct ppc_link_hash_table *htab;
5625 char save;
5626
5627 /* We aren't supposed to use alloca in BFD because on
5628 systems which do not have alloca the version in libiberty
5629 calls xmalloc, which might cause the program to crash
5630 when it runs out of memory. This function doesn't have a
5631 return status, so there's no way to gracefully return an
5632 error. So cheat. We know that string[-1] can be safely
5633 accessed; It's either a string in an ELF string table,
5634 or allocated in an objalloc structure. */
5635
5636 p = eh->elf.root.root.string - 1;
5637 save = *p;
5638 *(char *) p = '.';
5639 htab = ppc_hash_table (info);
5640 fh = (struct ppc_link_hash_entry *)
5641 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5642 *(char *) p = save;
5643
5644 /* Unfortunately, if it so happens that the string we were
5645 looking for was allocated immediately before this string,
5646 then we overwrote the string terminator. That's the only
5647 reason the lookup should fail. */
5648 if (fh == NULL)
5649 {
5650 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5651 while (q >= eh->elf.root.root.string && *q == *p)
5652 --q, --p;
5653 if (q < eh->elf.root.root.string && *p == '.')
5654 fh = (struct ppc_link_hash_entry *)
5655 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5656 }
5657 if (fh != NULL)
5658 {
5659 eh->oh = fh;
5660 fh->oh = eh;
5661 }
5662 }
5663 if (fh != NULL)
5664 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5665 }
5666 }
5667
5668 static bfd_boolean
5669 get_sym_h (struct elf_link_hash_entry **hp,
5670 Elf_Internal_Sym **symp,
5671 asection **symsecp,
5672 char **tls_maskp,
5673 Elf_Internal_Sym **locsymsp,
5674 unsigned long r_symndx,
5675 bfd *ibfd)
5676 {
5677 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5678
5679 if (r_symndx >= symtab_hdr->sh_info)
5680 {
5681 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5682 struct elf_link_hash_entry *h;
5683
5684 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5685 while (h->root.type == bfd_link_hash_indirect
5686 || h->root.type == bfd_link_hash_warning)
5687 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5688
5689 if (hp != NULL)
5690 *hp = h;
5691
5692 if (symp != NULL)
5693 *symp = NULL;
5694
5695 if (symsecp != NULL)
5696 {
5697 asection *symsec = NULL;
5698 if (h->root.type == bfd_link_hash_defined
5699 || h->root.type == bfd_link_hash_defweak)
5700 symsec = h->root.u.def.section;
5701 *symsecp = symsec;
5702 }
5703
5704 if (tls_maskp != NULL)
5705 {
5706 struct ppc_link_hash_entry *eh;
5707
5708 eh = (struct ppc_link_hash_entry *) h;
5709 *tls_maskp = &eh->tls_mask;
5710 }
5711 }
5712 else
5713 {
5714 Elf_Internal_Sym *sym;
5715 Elf_Internal_Sym *locsyms = *locsymsp;
5716
5717 if (locsyms == NULL)
5718 {
5719 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5720 if (locsyms == NULL)
5721 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5722 symtab_hdr->sh_info,
5723 0, NULL, NULL, NULL);
5724 if (locsyms == NULL)
5725 return FALSE;
5726 *locsymsp = locsyms;
5727 }
5728 sym = locsyms + r_symndx;
5729
5730 if (hp != NULL)
5731 *hp = NULL;
5732
5733 if (symp != NULL)
5734 *symp = sym;
5735
5736 if (symsecp != NULL)
5737 {
5738 asection *symsec = NULL;
5739 if ((sym->st_shndx != SHN_UNDEF
5740 && sym->st_shndx < SHN_LORESERVE)
5741 || sym->st_shndx > SHN_HIRESERVE)
5742 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5743 *symsecp = symsec;
5744 }
5745
5746 if (tls_maskp != NULL)
5747 {
5748 struct got_entry **lgot_ents;
5749 char *tls_mask;
5750
5751 tls_mask = NULL;
5752 lgot_ents = elf_local_got_ents (ibfd);
5753 if (lgot_ents != NULL)
5754 {
5755 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5756 tls_mask = &lgot_masks[r_symndx];
5757 }
5758 *tls_maskp = tls_mask;
5759 }
5760 }
5761 return TRUE;
5762 }
5763
5764 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5765 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5766 type suitable for optimization, and 1 otherwise. */
5767
5768 static int
5769 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5770 Elf_Internal_Sym **locsymsp,
5771 const Elf_Internal_Rela *rel, bfd *ibfd)
5772 {
5773 unsigned long r_symndx;
5774 int next_r;
5775 struct elf_link_hash_entry *h;
5776 Elf_Internal_Sym *sym;
5777 asection *sec;
5778 bfd_vma off;
5779
5780 r_symndx = ELF64_R_SYM (rel->r_info);
5781 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5782 return 0;
5783
5784 if ((*tls_maskp != NULL && **tls_maskp != 0)
5785 || sec == NULL
5786 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5787 return 1;
5788
5789 /* Look inside a TOC section too. */
5790 if (h != NULL)
5791 {
5792 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5793 off = h->root.u.def.value;
5794 }
5795 else
5796 off = sym->st_value;
5797 off += rel->r_addend;
5798 BFD_ASSERT (off % 8 == 0);
5799 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5800 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5801 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5802 return 0;
5803 if (toc_symndx != NULL)
5804 *toc_symndx = r_symndx;
5805 if ((h == NULL
5806 || ((h->root.type == bfd_link_hash_defined
5807 || h->root.type == bfd_link_hash_defweak)
5808 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5809 && (next_r == -1 || next_r == -2))
5810 return 1 - next_r;
5811 return 1;
5812 }
5813
5814 /* Adjust all global syms defined in opd sections. In gcc generated
5815 code for the old ABI, these will already have been done. */
5816
5817 static bfd_boolean
5818 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5819 {
5820 struct ppc_link_hash_entry *eh;
5821 asection *sym_sec;
5822 long *opd_adjust;
5823
5824 if (h->root.type == bfd_link_hash_indirect)
5825 return TRUE;
5826
5827 if (h->root.type == bfd_link_hash_warning)
5828 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5829
5830 if (h->root.type != bfd_link_hash_defined
5831 && h->root.type != bfd_link_hash_defweak)
5832 return TRUE;
5833
5834 eh = (struct ppc_link_hash_entry *) h;
5835 if (eh->adjust_done)
5836 return TRUE;
5837
5838 sym_sec = eh->elf.root.u.def.section;
5839 opd_adjust = get_opd_info (sym_sec);
5840 if (opd_adjust != NULL)
5841 {
5842 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5843 if (adjust == -1)
5844 {
5845 /* This entry has been deleted. */
5846 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5847 if (dsec == NULL)
5848 {
5849 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5850 if (elf_discarded_section (dsec))
5851 {
5852 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5853 break;
5854 }
5855 }
5856 eh->elf.root.u.def.value = 0;
5857 eh->elf.root.u.def.section = dsec;
5858 }
5859 else
5860 eh->elf.root.u.def.value += adjust;
5861 eh->adjust_done = 1;
5862 }
5863 return TRUE;
5864 }
5865
5866 /* Remove unused Official Procedure Descriptor entries. Currently we
5867 only remove those associated with functions in discarded link-once
5868 sections, or weakly defined functions that have been overridden. It
5869 would be possible to remove many more entries for statically linked
5870 applications. */
5871
5872 bfd_boolean
5873 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5874 bfd_boolean non_overlapping)
5875 {
5876 bfd *ibfd;
5877 bfd_boolean some_edited = FALSE;
5878 asection *need_pad = NULL;
5879
5880 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5881 {
5882 asection *sec;
5883 Elf_Internal_Rela *relstart, *rel, *relend;
5884 Elf_Internal_Shdr *symtab_hdr;
5885 Elf_Internal_Sym *local_syms;
5886 struct elf_link_hash_entry **sym_hashes;
5887 bfd_vma offset;
5888 bfd_size_type amt;
5889 long *opd_adjust;
5890 bfd_boolean need_edit, add_aux_fields;
5891 bfd_size_type cnt_16b = 0;
5892
5893 sec = bfd_get_section_by_name (ibfd, ".opd");
5894 if (sec == NULL)
5895 continue;
5896
5897 amt = sec->size * sizeof (long) / 8;
5898 opd_adjust = get_opd_info (sec);
5899 if (opd_adjust == NULL)
5900 {
5901 /* Must be a ld -r link. ie. check_relocs hasn't been
5902 called. */
5903 opd_adjust = bfd_zalloc (obfd, amt);
5904 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5905 }
5906 memset (opd_adjust, 0, amt);
5907
5908 if (sec->output_section == bfd_abs_section_ptr)
5909 continue;
5910
5911 /* Look through the section relocs. */
5912 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5913 continue;
5914
5915 local_syms = NULL;
5916 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5917 sym_hashes = elf_sym_hashes (ibfd);
5918
5919 /* Read the relocations. */
5920 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5921 info->keep_memory);
5922 if (relstart == NULL)
5923 return FALSE;
5924
5925 /* First run through the relocs to check they are sane, and to
5926 determine whether we need to edit this opd section. */
5927 need_edit = FALSE;
5928 need_pad = sec;
5929 offset = 0;
5930 relend = relstart + sec->reloc_count;
5931 for (rel = relstart; rel < relend; )
5932 {
5933 enum elf_ppc64_reloc_type r_type;
5934 unsigned long r_symndx;
5935 asection *sym_sec;
5936 struct elf_link_hash_entry *h;
5937 Elf_Internal_Sym *sym;
5938
5939 /* .opd contains a regular array of 16 or 24 byte entries. We're
5940 only interested in the reloc pointing to a function entry
5941 point. */
5942 if (rel->r_offset != offset
5943 || rel + 1 >= relend
5944 || (rel + 1)->r_offset != offset + 8)
5945 {
5946 /* If someone messes with .opd alignment then after a
5947 "ld -r" we might have padding in the middle of .opd.
5948 Also, there's nothing to prevent someone putting
5949 something silly in .opd with the assembler. No .opd
5950 optimization for them! */
5951 broken_opd:
5952 (*_bfd_error_handler)
5953 (_("%B: .opd is not a regular array of opd entries"), ibfd);
5954 need_edit = FALSE;
5955 break;
5956 }
5957
5958 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5959 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5960 {
5961 (*_bfd_error_handler)
5962 (_("%B: unexpected reloc type %u in .opd section"),
5963 ibfd, r_type);
5964 need_edit = FALSE;
5965 break;
5966 }
5967
5968 r_symndx = ELF64_R_SYM (rel->r_info);
5969 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5970 r_symndx, ibfd))
5971 goto error_ret;
5972
5973 if (sym_sec == NULL || sym_sec->owner == NULL)
5974 {
5975 const char *sym_name;
5976 if (h != NULL)
5977 sym_name = h->root.root.string;
5978 else
5979 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5980
5981 (*_bfd_error_handler)
5982 (_("%B: undefined sym `%s' in .opd section"),
5983 ibfd, sym_name);
5984 need_edit = FALSE;
5985 break;
5986 }
5987
5988 /* opd entries are always for functions defined in the
5989 current input bfd. If the symbol isn't defined in the
5990 input bfd, then we won't be using the function in this
5991 bfd; It must be defined in a linkonce section in another
5992 bfd, or is weak. It's also possible that we are
5993 discarding the function due to a linker script /DISCARD/,
5994 which we test for via the output_section. */
5995 if (sym_sec->owner != ibfd
5996 || sym_sec->output_section == bfd_abs_section_ptr)
5997 need_edit = TRUE;
5998
5999 rel += 2;
6000 if (rel == relend
6001 || (rel + 1 == relend && rel->r_offset == offset + 16))
6002 {
6003 if (sec->size == offset + 24)
6004 {
6005 need_pad = NULL;
6006 break;
6007 }
6008 if (rel == relend && sec->size == offset + 16)
6009 {
6010 cnt_16b++;
6011 break;
6012 }
6013 goto broken_opd;
6014 }
6015
6016 if (rel->r_offset == offset + 24)
6017 offset += 24;
6018 else if (rel->r_offset != offset + 16)
6019 goto broken_opd;
6020 else if (rel + 1 < relend
6021 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6022 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6023 {
6024 offset += 16;
6025 cnt_16b++;
6026 }
6027 else if (rel + 2 < relend
6028 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6029 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6030 {
6031 offset += 24;
6032 rel += 1;
6033 }
6034 else
6035 goto broken_opd;
6036 }
6037
6038 add_aux_fields = non_overlapping && cnt_16b > 0;
6039
6040 if (need_edit || add_aux_fields)
6041 {
6042 Elf_Internal_Rela *write_rel;
6043 bfd_byte *rptr, *wptr;
6044 bfd_byte *new_contents = NULL;
6045 bfd_boolean skip;
6046 long opd_ent_size;
6047
6048 /* This seems a waste of time as input .opd sections are all
6049 zeros as generated by gcc, but I suppose there's no reason
6050 this will always be so. We might start putting something in
6051 the third word of .opd entries. */
6052 if ((sec->flags & SEC_IN_MEMORY) == 0)
6053 {
6054 bfd_byte *loc;
6055 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6056 {
6057 if (loc != NULL)
6058 free (loc);
6059 error_ret:
6060 if (local_syms != NULL
6061 && symtab_hdr->contents != (unsigned char *) local_syms)
6062 free (local_syms);
6063 if (elf_section_data (sec)->relocs != relstart)
6064 free (relstart);
6065 return FALSE;
6066 }
6067 sec->contents = loc;
6068 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6069 }
6070
6071 elf_section_data (sec)->relocs = relstart;
6072
6073 wptr = sec->contents;
6074 rptr = sec->contents;
6075 new_contents = sec->contents;
6076
6077 if (add_aux_fields)
6078 {
6079 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6080 if (new_contents == NULL)
6081 return FALSE;
6082 need_pad = FALSE;
6083 wptr = new_contents;
6084 }
6085
6086 write_rel = relstart;
6087 skip = FALSE;
6088 offset = 0;
6089 opd_ent_size = 0;
6090 for (rel = relstart; rel < relend; rel++)
6091 {
6092 unsigned long r_symndx;
6093 asection *sym_sec;
6094 struct elf_link_hash_entry *h;
6095 Elf_Internal_Sym *sym;
6096
6097 r_symndx = ELF64_R_SYM (rel->r_info);
6098 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6099 r_symndx, ibfd))
6100 goto error_ret;
6101
6102 if (rel->r_offset == offset)
6103 {
6104 struct ppc_link_hash_entry *fdh = NULL;
6105
6106 /* See if the .opd entry is full 24 byte or
6107 16 byte (with fd_aux entry overlapped with next
6108 fd_func). */
6109 opd_ent_size = 24;
6110 if ((rel + 2 == relend && sec->size == offset + 16)
6111 || (rel + 3 < relend
6112 && rel[2].r_offset == offset + 16
6113 && rel[3].r_offset == offset + 24
6114 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6115 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6116 opd_ent_size = 16;
6117
6118 if (h != NULL
6119 && h->root.root.string[0] == '.')
6120 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6121 ppc_hash_table (info));
6122
6123 skip = (sym_sec->owner != ibfd
6124 || sym_sec->output_section == bfd_abs_section_ptr);
6125 if (skip)
6126 {
6127 if (fdh != NULL && sym_sec->owner == ibfd)
6128 {
6129 /* Arrange for the function descriptor sym
6130 to be dropped. */
6131 fdh->elf.root.u.def.value = 0;
6132 fdh->elf.root.u.def.section = sym_sec;
6133 }
6134 opd_adjust[rel->r_offset / 8] = -1;
6135 }
6136 else
6137 {
6138 /* We'll be keeping this opd entry. */
6139
6140 if (fdh != NULL)
6141 {
6142 /* Redefine the function descriptor symbol to
6143 this location in the opd section. It is
6144 necessary to update the value here rather
6145 than using an array of adjustments as we do
6146 for local symbols, because various places
6147 in the generic ELF code use the value
6148 stored in u.def.value. */
6149 fdh->elf.root.u.def.value = wptr - new_contents;
6150 fdh->adjust_done = 1;
6151 }
6152
6153 /* Local syms are a bit tricky. We could
6154 tweak them as they can be cached, but
6155 we'd need to look through the local syms
6156 for the function descriptor sym which we
6157 don't have at the moment. So keep an
6158 array of adjustments. */
6159 opd_adjust[rel->r_offset / 8]
6160 = (wptr - new_contents) - (rptr - sec->contents);
6161
6162 if (wptr != rptr)
6163 memcpy (wptr, rptr, opd_ent_size);
6164 wptr += opd_ent_size;
6165 if (add_aux_fields && opd_ent_size == 16)
6166 {
6167 memset (wptr, '\0', 8);
6168 wptr += 8;
6169 }
6170 }
6171 rptr += opd_ent_size;
6172 offset += opd_ent_size;
6173 }
6174
6175 if (skip)
6176 {
6177 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6178 if (info->shared)
6179 {
6180 /* We won't be needing dynamic relocs here. */
6181 struct ppc_dyn_relocs **pp;
6182 struct ppc_dyn_relocs *p;
6183
6184 if (h != NULL)
6185 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6186 else if (sym_sec != NULL)
6187 pp = ((struct ppc_dyn_relocs **)
6188 &elf_section_data (sym_sec)->local_dynrel);
6189 else
6190 pp = ((struct ppc_dyn_relocs **)
6191 &elf_section_data (sec)->local_dynrel);
6192 while ((p = *pp) != NULL)
6193 {
6194 if (p->sec == sec)
6195 {
6196 p->count -= 1;
6197 if (p->count == 0)
6198 *pp = p->next;
6199 break;
6200 }
6201 pp = &p->next;
6202 }
6203 }
6204 }
6205 else
6206 {
6207 /* We need to adjust any reloc offsets to point to the
6208 new opd entries. While we're at it, we may as well
6209 remove redundant relocs. */
6210 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6211 if (write_rel != rel)
6212 memcpy (write_rel, rel, sizeof (*rel));
6213 ++write_rel;
6214 }
6215 }
6216
6217 sec->size = wptr - new_contents;
6218 sec->reloc_count = write_rel - relstart;
6219 if (add_aux_fields)
6220 {
6221 free (sec->contents);
6222 sec->contents = new_contents;
6223 }
6224
6225 /* Fudge the size too, as this is used later in
6226 elf_bfd_final_link if we are emitting relocs. */
6227 elf_section_data (sec)->rel_hdr.sh_size
6228 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6229 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6230 some_edited = TRUE;
6231 }
6232 else if (elf_section_data (sec)->relocs != relstart)
6233 free (relstart);
6234
6235 if (local_syms != NULL
6236 && symtab_hdr->contents != (unsigned char *) local_syms)
6237 {
6238 if (!info->keep_memory)
6239 free (local_syms);
6240 else
6241 symtab_hdr->contents = (unsigned char *) local_syms;
6242 }
6243 }
6244
6245 if (some_edited)
6246 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6247
6248 /* If we are doing a final link and the last .opd entry is just 16 byte
6249 long, add a 8 byte padding after it. */
6250 if (need_pad != NULL && !info->relocatable)
6251 {
6252 bfd_byte *p;
6253
6254 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6255 {
6256 BFD_ASSERT (need_pad->size > 0);
6257
6258 p = bfd_malloc (need_pad->size + 8);
6259 if (p == NULL)
6260 return FALSE;
6261
6262 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6263 p, 0, need_pad->size))
6264 return FALSE;
6265
6266 need_pad->contents = p;
6267 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6268 }
6269 else
6270 {
6271 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6272 if (p == NULL)
6273 return FALSE;
6274
6275 need_pad->contents = p;
6276 }
6277
6278 memset (need_pad->contents + need_pad->size, 0, 8);
6279 need_pad->size += 8;
6280 }
6281
6282 return TRUE;
6283 }
6284
6285 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6286
6287 asection *
6288 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6289 {
6290 struct ppc_link_hash_table *htab;
6291
6292 htab = ppc_hash_table (info);
6293 if (htab->tls_get_addr != NULL)
6294 {
6295 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6296
6297 while (h->elf.root.type == bfd_link_hash_indirect
6298 || h->elf.root.type == bfd_link_hash_warning)
6299 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6300
6301 htab->tls_get_addr = h;
6302
6303 if (htab->tls_get_addr_fd == NULL
6304 && h->oh != NULL
6305 && h->oh->is_func_descriptor)
6306 htab->tls_get_addr_fd = h->oh;
6307 }
6308
6309 if (htab->tls_get_addr_fd != NULL)
6310 {
6311 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6312
6313 while (h->elf.root.type == bfd_link_hash_indirect
6314 || h->elf.root.type == bfd_link_hash_warning)
6315 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6316
6317 htab->tls_get_addr_fd = h;
6318 }
6319
6320 return _bfd_elf_tls_setup (obfd, info);
6321 }
6322
6323 /* Run through all the TLS relocs looking for optimization
6324 opportunities. The linker has been hacked (see ppc64elf.em) to do
6325 a preliminary section layout so that we know the TLS segment
6326 offsets. We can't optimize earlier because some optimizations need
6327 to know the tp offset, and we need to optimize before allocating
6328 dynamic relocations. */
6329
6330 bfd_boolean
6331 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6332 {
6333 bfd *ibfd;
6334 asection *sec;
6335 struct ppc_link_hash_table *htab;
6336
6337 if (info->relocatable || info->shared)
6338 return TRUE;
6339
6340 htab = ppc_hash_table (info);
6341 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6342 {
6343 Elf_Internal_Sym *locsyms = NULL;
6344
6345 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6346 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6347 {
6348 Elf_Internal_Rela *relstart, *rel, *relend;
6349 int expecting_tls_get_addr;
6350
6351 /* Read the relocations. */
6352 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6353 info->keep_memory);
6354 if (relstart == NULL)
6355 return FALSE;
6356
6357 expecting_tls_get_addr = 0;
6358 relend = relstart + sec->reloc_count;
6359 for (rel = relstart; rel < relend; rel++)
6360 {
6361 enum elf_ppc64_reloc_type r_type;
6362 unsigned long r_symndx;
6363 struct elf_link_hash_entry *h;
6364 Elf_Internal_Sym *sym;
6365 asection *sym_sec;
6366 char *tls_mask;
6367 char tls_set, tls_clear, tls_type = 0;
6368 bfd_vma value;
6369 bfd_boolean ok_tprel, is_local;
6370
6371 r_symndx = ELF64_R_SYM (rel->r_info);
6372 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6373 r_symndx, ibfd))
6374 {
6375 err_free_rel:
6376 if (elf_section_data (sec)->relocs != relstart)
6377 free (relstart);
6378 if (locsyms != NULL
6379 && (elf_tdata (ibfd)->symtab_hdr.contents
6380 != (unsigned char *) locsyms))
6381 free (locsyms);
6382 return FALSE;
6383 }
6384
6385 if (h != NULL)
6386 {
6387 if (h->root.type != bfd_link_hash_defined
6388 && h->root.type != bfd_link_hash_defweak)
6389 continue;
6390 value = h->root.u.def.value;
6391 }
6392 else
6393 /* Symbols referenced by TLS relocs must be of type
6394 STT_TLS. So no need for .opd local sym adjust. */
6395 value = sym->st_value;
6396
6397 ok_tprel = FALSE;
6398 is_local = FALSE;
6399 if (h == NULL
6400 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6401 {
6402 is_local = TRUE;
6403 value += sym_sec->output_offset;
6404 value += sym_sec->output_section->vma;
6405 value -= htab->elf.tls_sec->vma;
6406 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6407 < (bfd_vma) 1 << 32);
6408 }
6409
6410 r_type = ELF64_R_TYPE (rel->r_info);
6411 switch (r_type)
6412 {
6413 case R_PPC64_GOT_TLSLD16:
6414 case R_PPC64_GOT_TLSLD16_LO:
6415 case R_PPC64_GOT_TLSLD16_HI:
6416 case R_PPC64_GOT_TLSLD16_HA:
6417 /* These relocs should never be against a symbol
6418 defined in a shared lib. Leave them alone if
6419 that turns out to be the case. */
6420 ppc64_tlsld_got (ibfd)->refcount -= 1;
6421 if (!is_local)
6422 continue;
6423
6424 /* LD -> LE */
6425 tls_set = 0;
6426 tls_clear = TLS_LD;
6427 tls_type = TLS_TLS | TLS_LD;
6428 expecting_tls_get_addr = 1;
6429 break;
6430
6431 case R_PPC64_GOT_TLSGD16:
6432 case R_PPC64_GOT_TLSGD16_LO:
6433 case R_PPC64_GOT_TLSGD16_HI:
6434 case R_PPC64_GOT_TLSGD16_HA:
6435 if (ok_tprel)
6436 /* GD -> LE */
6437 tls_set = 0;
6438 else
6439 /* GD -> IE */
6440 tls_set = TLS_TLS | TLS_TPRELGD;
6441 tls_clear = TLS_GD;
6442 tls_type = TLS_TLS | TLS_GD;
6443 expecting_tls_get_addr = 1;
6444 break;
6445
6446 case R_PPC64_GOT_TPREL16_DS:
6447 case R_PPC64_GOT_TPREL16_LO_DS:
6448 case R_PPC64_GOT_TPREL16_HI:
6449 case R_PPC64_GOT_TPREL16_HA:
6450 expecting_tls_get_addr = 0;
6451 if (ok_tprel)
6452 {
6453 /* IE -> LE */
6454 tls_set = 0;
6455 tls_clear = TLS_TPREL;
6456 tls_type = TLS_TLS | TLS_TPREL;
6457 break;
6458 }
6459 else
6460 continue;
6461
6462 case R_PPC64_REL14:
6463 case R_PPC64_REL14_BRTAKEN:
6464 case R_PPC64_REL14_BRNTAKEN:
6465 case R_PPC64_REL24:
6466 if (h != NULL
6467 && (h == &htab->tls_get_addr->elf
6468 || h == &htab->tls_get_addr_fd->elf))
6469 {
6470 if (!expecting_tls_get_addr
6471 && rel != relstart
6472 && ((ELF64_R_TYPE (rel[-1].r_info)
6473 == R_PPC64_TOC16)
6474 || (ELF64_R_TYPE (rel[-1].r_info)
6475 == R_PPC64_TOC16_LO)))
6476 {
6477 /* Check for toc tls entries. */
6478 char *toc_tls;
6479 int retval;
6480
6481 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6482 rel - 1, ibfd);
6483 if (retval == 0)
6484 goto err_free_rel;
6485 if (toc_tls != NULL)
6486 expecting_tls_get_addr = retval > 1;
6487 }
6488
6489 if (expecting_tls_get_addr)
6490 {
6491 struct plt_entry *ent;
6492 for (ent = h->plt.plist; ent; ent = ent->next)
6493 if (ent->addend == 0)
6494 {
6495 if (ent->plt.refcount > 0)
6496 ent->plt.refcount -= 1;
6497 break;
6498 }
6499 }
6500 }
6501 expecting_tls_get_addr = 0;
6502 continue;
6503
6504 case R_PPC64_TPREL64:
6505 expecting_tls_get_addr = 0;
6506 if (ok_tprel)
6507 {
6508 /* IE -> LE */
6509 tls_set = TLS_EXPLICIT;
6510 tls_clear = TLS_TPREL;
6511 break;
6512 }
6513 else
6514 continue;
6515
6516 case R_PPC64_DTPMOD64:
6517 expecting_tls_get_addr = 0;
6518 if (rel + 1 < relend
6519 && (rel[1].r_info
6520 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6521 && rel[1].r_offset == rel->r_offset + 8)
6522 {
6523 if (ok_tprel)
6524 /* GD -> LE */
6525 tls_set = TLS_EXPLICIT | TLS_GD;
6526 else
6527 /* GD -> IE */
6528 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6529 tls_clear = TLS_GD;
6530 }
6531 else
6532 {
6533 if (!is_local)
6534 continue;
6535
6536 /* LD -> LE */
6537 tls_set = TLS_EXPLICIT;
6538 tls_clear = TLS_LD;
6539 }
6540 break;
6541
6542 default:
6543 expecting_tls_get_addr = 0;
6544 continue;
6545 }
6546
6547 if ((tls_set & TLS_EXPLICIT) == 0)
6548 {
6549 struct got_entry *ent;
6550
6551 /* Adjust got entry for this reloc. */
6552 if (h != NULL)
6553 ent = h->got.glist;
6554 else
6555 ent = elf_local_got_ents (ibfd)[r_symndx];
6556
6557 for (; ent != NULL; ent = ent->next)
6558 if (ent->addend == rel->r_addend
6559 && ent->owner == ibfd
6560 && ent->tls_type == tls_type)
6561 break;
6562 if (ent == NULL)
6563 abort ();
6564
6565 if (tls_set == 0)
6566 {
6567 /* We managed to get rid of a got entry. */
6568 if (ent->got.refcount > 0)
6569 ent->got.refcount -= 1;
6570 }
6571 }
6572 else if (h != NULL)
6573 {
6574 struct ppc_link_hash_entry * eh;
6575 struct ppc_dyn_relocs **pp;
6576 struct ppc_dyn_relocs *p;
6577
6578 /* Adjust dynamic relocs. */
6579 eh = (struct ppc_link_hash_entry *) h;
6580 for (pp = &eh->dyn_relocs;
6581 (p = *pp) != NULL;
6582 pp = &p->next)
6583 if (p->sec == sec)
6584 {
6585 /* If we got rid of a DTPMOD/DTPREL reloc
6586 pair then we'll lose one or two dyn
6587 relocs. */
6588 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6589 p->count -= 1;
6590 p->count -= 1;
6591 if (p->count == 0)
6592 *pp = p->next;
6593 break;
6594 }
6595 }
6596
6597 *tls_mask |= tls_set;
6598 *tls_mask &= ~tls_clear;
6599 }
6600
6601 if (elf_section_data (sec)->relocs != relstart)
6602 free (relstart);
6603 }
6604
6605 if (locsyms != NULL
6606 && (elf_tdata (ibfd)->symtab_hdr.contents
6607 != (unsigned char *) locsyms))
6608 {
6609 if (!info->keep_memory)
6610 free (locsyms);
6611 else
6612 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6613 }
6614 }
6615 return TRUE;
6616 }
6617
6618 /* Allocate space in .plt, .got and associated reloc sections for
6619 dynamic relocs. */
6620
6621 static bfd_boolean
6622 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6623 {
6624 struct bfd_link_info *info;
6625 struct ppc_link_hash_table *htab;
6626 asection *s;
6627 struct ppc_link_hash_entry *eh;
6628 struct ppc_dyn_relocs *p;
6629 struct got_entry *gent;
6630
6631 if (h->root.type == bfd_link_hash_indirect)
6632 return TRUE;
6633
6634 if (h->root.type == bfd_link_hash_warning)
6635 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6636
6637 info = (struct bfd_link_info *) inf;
6638 htab = ppc_hash_table (info);
6639
6640 if (htab->elf.dynamic_sections_created
6641 && h->dynindx != -1
6642 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
6643 {
6644 struct plt_entry *pent;
6645 bfd_boolean doneone = FALSE;
6646 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
6647 if (pent->plt.refcount > 0)
6648 {
6649 /* If this is the first .plt entry, make room for the special
6650 first entry. */
6651 s = htab->plt;
6652 if (s->size == 0)
6653 s->size += PLT_INITIAL_ENTRY_SIZE;
6654
6655 pent->plt.offset = s->size;
6656
6657 /* Make room for this entry. */
6658 s->size += PLT_ENTRY_SIZE;
6659
6660 /* Make room for the .glink code. */
6661 s = htab->glink;
6662 if (s->size == 0)
6663 s->size += GLINK_CALL_STUB_SIZE;
6664 /* We need bigger stubs past index 32767. */
6665 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
6666 s->size += 4;
6667 s->size += 2*4;
6668
6669 /* We also need to make an entry in the .rela.plt section. */
6670 s = htab->relplt;
6671 s->size += sizeof (Elf64_External_Rela);
6672 doneone = TRUE;
6673 }
6674 else
6675 pent->plt.offset = (bfd_vma) -1;
6676 if (!doneone)
6677 {
6678 h->plt.plist = NULL;
6679 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6680 }
6681 }
6682 else
6683 {
6684 h->plt.plist = NULL;
6685 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6686 }
6687
6688 eh = (struct ppc_link_hash_entry *) h;
6689 /* Run through the TLS GD got entries first if we're changing them
6690 to TPREL. */
6691 if ((eh->tls_mask & TLS_TPRELGD) != 0)
6692 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6693 if (gent->got.refcount > 0
6694 && (gent->tls_type & TLS_GD) != 0)
6695 {
6696 /* This was a GD entry that has been converted to TPREL. If
6697 there happens to be a TPREL entry we can use that one. */
6698 struct got_entry *ent;
6699 for (ent = h->got.glist; ent != NULL; ent = ent->next)
6700 if (ent->got.refcount > 0
6701 && (ent->tls_type & TLS_TPREL) != 0
6702 && ent->addend == gent->addend
6703 && ent->owner == gent->owner)
6704 {
6705 gent->got.refcount = 0;
6706 break;
6707 }
6708
6709 /* If not, then we'll be using our own TPREL entry. */
6710 if (gent->got.refcount != 0)
6711 gent->tls_type = TLS_TLS | TLS_TPREL;
6712 }
6713
6714 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6715 if (gent->got.refcount > 0)
6716 {
6717 bfd_boolean dyn;
6718
6719 /* Make sure this symbol is output as a dynamic symbol.
6720 Undefined weak syms won't yet be marked as dynamic,
6721 nor will all TLS symbols. */
6722 if (h->dynindx == -1
6723 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6724 {
6725 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6726 return FALSE;
6727 }
6728
6729 if ((gent->tls_type & TLS_LD) != 0
6730 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6731 {
6732 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
6733 continue;
6734 }
6735
6736 s = ppc64_elf_tdata (gent->owner)->got;
6737 gent->got.offset = s->size;
6738 s->size
6739 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
6740 dyn = htab->elf.dynamic_sections_created;
6741 if ((info->shared
6742 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
6743 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6744 || h->root.type != bfd_link_hash_undefweak))
6745 ppc64_elf_tdata (gent->owner)->relgot->size
6746 += (gent->tls_type & eh->tls_mask & TLS_GD
6747 ? 2 * sizeof (Elf64_External_Rela)
6748 : sizeof (Elf64_External_Rela));
6749 }
6750 else
6751 gent->got.offset = (bfd_vma) -1;
6752
6753 if (eh->dyn_relocs == NULL)
6754 return TRUE;
6755
6756 /* In the shared -Bsymbolic case, discard space allocated for
6757 dynamic pc-relative relocs against symbols which turn out to be
6758 defined in regular objects. For the normal shared case, discard
6759 space for relocs that have become local due to symbol visibility
6760 changes. */
6761
6762 if (info->shared)
6763 {
6764 /* Relocs that use pc_count are those that appear on a call insn,
6765 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
6766 generated via assembly. We want calls to protected symbols to
6767 resolve directly to the function rather than going via the plt.
6768 If people want function pointer comparisons to work as expected
6769 then they should avoid writing weird assembly. */
6770 if (SYMBOL_CALLS_LOCAL (info, h))
6771 {
6772 struct ppc_dyn_relocs **pp;
6773
6774 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6775 {
6776 p->count -= p->pc_count;
6777 p->pc_count = 0;
6778 if (p->count == 0)
6779 *pp = p->next;
6780 else
6781 pp = &p->next;
6782 }
6783 }
6784
6785 /* Also discard relocs on undefined weak syms with non-default
6786 visibility. */
6787 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6788 && h->root.type == bfd_link_hash_undefweak)
6789 eh->dyn_relocs = NULL;
6790 }
6791 else if (ELIMINATE_COPY_RELOCS)
6792 {
6793 /* For the non-shared case, discard space for relocs against
6794 symbols which turn out to need copy relocs or are not
6795 dynamic. */
6796
6797 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
6798 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
6799 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
6800 {
6801 /* Make sure this symbol is output as a dynamic symbol.
6802 Undefined weak syms won't yet be marked as dynamic. */
6803 if (h->dynindx == -1
6804 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6805 {
6806 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6807 return FALSE;
6808 }
6809
6810 /* If that succeeded, we know we'll be keeping all the
6811 relocs. */
6812 if (h->dynindx != -1)
6813 goto keep;
6814 }
6815
6816 eh->dyn_relocs = NULL;
6817
6818 keep: ;
6819 }
6820
6821 /* Finally, allocate space. */
6822 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6823 {
6824 asection *sreloc = elf_section_data (p->sec)->sreloc;
6825 sreloc->size += p->count * sizeof (Elf64_External_Rela);
6826 }
6827
6828 return TRUE;
6829 }
6830
6831 /* Find any dynamic relocs that apply to read-only sections. */
6832
6833 static bfd_boolean
6834 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6835 {
6836 struct ppc_link_hash_entry *eh;
6837 struct ppc_dyn_relocs *p;
6838
6839 if (h->root.type == bfd_link_hash_warning)
6840 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6841
6842 eh = (struct ppc_link_hash_entry *) h;
6843 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6844 {
6845 asection *s = p->sec->output_section;
6846
6847 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6848 {
6849 struct bfd_link_info *info = inf;
6850
6851 info->flags |= DF_TEXTREL;
6852
6853 /* Not an error, just cut short the traversal. */
6854 return FALSE;
6855 }
6856 }
6857 return TRUE;
6858 }
6859
6860 /* Set the sizes of the dynamic sections. */
6861
6862 static bfd_boolean
6863 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6864 struct bfd_link_info *info)
6865 {
6866 struct ppc_link_hash_table *htab;
6867 bfd *dynobj;
6868 asection *s;
6869 bfd_boolean relocs;
6870 bfd *ibfd;
6871
6872 htab = ppc_hash_table (info);
6873 dynobj = htab->elf.dynobj;
6874 if (dynobj == NULL)
6875 abort ();
6876
6877 if (htab->elf.dynamic_sections_created)
6878 {
6879 /* Set the contents of the .interp section to the interpreter. */
6880 if (info->executable)
6881 {
6882 s = bfd_get_section_by_name (dynobj, ".interp");
6883 if (s == NULL)
6884 abort ();
6885 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6886 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6887 }
6888 }
6889
6890 /* Set up .got offsets for local syms, and space for local dynamic
6891 relocs. */
6892 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6893 {
6894 struct got_entry **lgot_ents;
6895 struct got_entry **end_lgot_ents;
6896 char *lgot_masks;
6897 bfd_size_type locsymcount;
6898 Elf_Internal_Shdr *symtab_hdr;
6899 asection *srel;
6900
6901 if (!is_ppc64_target (ibfd->xvec))
6902 continue;
6903
6904 if (ppc64_tlsld_got (ibfd)->refcount > 0)
6905 {
6906 s = ppc64_elf_tdata (ibfd)->got;
6907 ppc64_tlsld_got (ibfd)->offset = s->size;
6908 s->size += 16;
6909 if (info->shared)
6910 {
6911 srel = ppc64_elf_tdata (ibfd)->relgot;
6912 srel->size += sizeof (Elf64_External_Rela);
6913 }
6914 }
6915 else
6916 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
6917
6918 for (s = ibfd->sections; s != NULL; s = s->next)
6919 {
6920 struct ppc_dyn_relocs *p;
6921
6922 for (p = *((struct ppc_dyn_relocs **)
6923 &elf_section_data (s)->local_dynrel);
6924 p != NULL;
6925 p = p->next)
6926 {
6927 if (!bfd_is_abs_section (p->sec)
6928 && bfd_is_abs_section (p->sec->output_section))
6929 {
6930 /* Input section has been discarded, either because
6931 it is a copy of a linkonce section or due to
6932 linker script /DISCARD/, so we'll be discarding
6933 the relocs too. */
6934 }
6935 else if (p->count != 0)
6936 {
6937 srel = elf_section_data (p->sec)->sreloc;
6938 srel->size += p->count * sizeof (Elf64_External_Rela);
6939 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
6940 info->flags |= DF_TEXTREL;
6941 }
6942 }
6943 }
6944
6945 lgot_ents = elf_local_got_ents (ibfd);
6946 if (!lgot_ents)
6947 continue;
6948
6949 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6950 locsymcount = symtab_hdr->sh_info;
6951 end_lgot_ents = lgot_ents + locsymcount;
6952 lgot_masks = (char *) end_lgot_ents;
6953 s = ppc64_elf_tdata (ibfd)->got;
6954 srel = ppc64_elf_tdata (ibfd)->relgot;
6955 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
6956 {
6957 struct got_entry *ent;
6958
6959 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
6960 if (ent->got.refcount > 0)
6961 {
6962 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
6963 {
6964 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
6965 {
6966 ppc64_tlsld_got (ibfd)->offset = s->size;
6967 s->size += 16;
6968 if (info->shared)
6969 srel->size += sizeof (Elf64_External_Rela);
6970 }
6971 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
6972 }
6973 else
6974 {
6975 ent->got.offset = s->size;
6976 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
6977 {
6978 s->size += 16;
6979 if (info->shared)
6980 srel->size += 2 * sizeof (Elf64_External_Rela);
6981 }
6982 else
6983 {
6984 s->size += 8;
6985 if (info->shared)
6986 srel->size += sizeof (Elf64_External_Rela);
6987 }
6988 }
6989 }
6990 else
6991 ent->got.offset = (bfd_vma) -1;
6992 }
6993 }
6994
6995 /* Allocate global sym .plt and .got entries, and space for global
6996 sym dynamic relocs. */
6997 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
6998
6999 /* We now have determined the sizes of the various dynamic sections.
7000 Allocate memory for them. */
7001 relocs = FALSE;
7002 for (s = dynobj->sections; s != NULL; s = s->next)
7003 {
7004 if ((s->flags & SEC_LINKER_CREATED) == 0)
7005 continue;
7006
7007 if (s == htab->brlt || s == htab->relbrlt)
7008 /* These haven't been allocated yet; don't strip. */
7009 continue;
7010 else if (s == htab->got
7011 || s == htab->plt
7012 || s == htab->glink)
7013 {
7014 /* Strip this section if we don't need it; see the
7015 comment below. */
7016 }
7017 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7018 {
7019 if (s->size == 0)
7020 {
7021 /* If we don't need this section, strip it from the
7022 output file. This is mostly to handle .rela.bss and
7023 .rela.plt. We must create both sections in
7024 create_dynamic_sections, because they must be created
7025 before the linker maps input sections to output
7026 sections. The linker does that before
7027 adjust_dynamic_symbol is called, and it is that
7028 function which decides whether anything needs to go
7029 into these sections. */
7030 }
7031 else
7032 {
7033 if (s != htab->relplt)
7034 relocs = TRUE;
7035
7036 /* We use the reloc_count field as a counter if we need
7037 to copy relocs into the output file. */
7038 s->reloc_count = 0;
7039 }
7040 }
7041 else
7042 {
7043 /* It's not one of our sections, so don't allocate space. */
7044 continue;
7045 }
7046
7047 if (s->size == 0)
7048 {
7049 _bfd_strip_section_from_output (info, s);
7050 continue;
7051 }
7052
7053 /* .plt is in the bss section. We don't initialise it. */
7054 if (s == htab->plt)
7055 continue;
7056
7057 /* Allocate memory for the section contents. We use bfd_zalloc
7058 here in case unused entries are not reclaimed before the
7059 section's contents are written out. This should not happen,
7060 but this way if it does we get a R_PPC64_NONE reloc in .rela
7061 sections instead of garbage.
7062 We also rely on the section contents being zero when writing
7063 the GOT. */
7064 s->contents = bfd_zalloc (dynobj, s->size);
7065 if (s->contents == NULL)
7066 return FALSE;
7067 }
7068
7069 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7070 {
7071 if (!is_ppc64_target (ibfd->xvec))
7072 continue;
7073
7074 s = ppc64_elf_tdata (ibfd)->got;
7075 if (s != NULL && s != htab->got)
7076 {
7077 if (s->size == 0)
7078 _bfd_strip_section_from_output (info, s);
7079 else
7080 {
7081 s->contents = bfd_zalloc (ibfd, s->size);
7082 if (s->contents == NULL)
7083 return FALSE;
7084 }
7085 }
7086 s = ppc64_elf_tdata (ibfd)->relgot;
7087 if (s != NULL)
7088 {
7089 if (s->size == 0)
7090 _bfd_strip_section_from_output (info, s);
7091 else
7092 {
7093 s->contents = bfd_zalloc (ibfd, s->size);
7094 if (s->contents == NULL)
7095 return FALSE;
7096 relocs = TRUE;
7097 s->reloc_count = 0;
7098 }
7099 }
7100 }
7101
7102 if (htab->elf.dynamic_sections_created)
7103 {
7104 /* Add some entries to the .dynamic section. We fill in the
7105 values later, in ppc64_elf_finish_dynamic_sections, but we
7106 must add the entries now so that we get the correct size for
7107 the .dynamic section. The DT_DEBUG entry is filled in by the
7108 dynamic linker and used by the debugger. */
7109 #define add_dynamic_entry(TAG, VAL) \
7110 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7111
7112 if (info->executable)
7113 {
7114 if (!add_dynamic_entry (DT_DEBUG, 0))
7115 return FALSE;
7116 }
7117
7118 if (htab->plt != NULL && htab->plt->size != 0)
7119 {
7120 if (!add_dynamic_entry (DT_PLTGOT, 0)
7121 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7122 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7123 || !add_dynamic_entry (DT_JMPREL, 0)
7124 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7125 return FALSE;
7126 }
7127
7128 if (NO_OPD_RELOCS)
7129 {
7130 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7131 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7132 return FALSE;
7133 }
7134
7135 if (relocs)
7136 {
7137 if (!add_dynamic_entry (DT_RELA, 0)
7138 || !add_dynamic_entry (DT_RELASZ, 0)
7139 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7140 return FALSE;
7141
7142 /* If any dynamic relocs apply to a read-only section,
7143 then we need a DT_TEXTREL entry. */
7144 if ((info->flags & DF_TEXTREL) == 0)
7145 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7146
7147 if ((info->flags & DF_TEXTREL) != 0)
7148 {
7149 if (!add_dynamic_entry (DT_TEXTREL, 0))
7150 return FALSE;
7151 }
7152 }
7153 }
7154 #undef add_dynamic_entry
7155
7156 return TRUE;
7157 }
7158
7159 /* Determine the type of stub needed, if any, for a call. */
7160
7161 static inline enum ppc_stub_type
7162 ppc_type_of_stub (asection *input_sec,
7163 const Elf_Internal_Rela *rel,
7164 struct ppc_link_hash_entry **hash,
7165 bfd_vma destination)
7166 {
7167 struct ppc_link_hash_entry *h = *hash;
7168 bfd_vma location;
7169 bfd_vma branch_offset;
7170 bfd_vma max_branch_offset;
7171 enum elf_ppc64_reloc_type r_type;
7172
7173 if (h != NULL)
7174 {
7175 if (h->oh != NULL
7176 && h->oh->is_func_descriptor)
7177 h = h->oh;
7178
7179 if (h->elf.dynindx != -1)
7180 {
7181 struct plt_entry *ent;
7182
7183 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7184 if (ent->addend == rel->r_addend
7185 && ent->plt.offset != (bfd_vma) -1)
7186 {
7187 *hash = h;
7188 return ppc_stub_plt_call;
7189 }
7190 }
7191
7192 if (!(h->elf.root.type == bfd_link_hash_defined
7193 || h->elf.root.type == bfd_link_hash_defweak)
7194 || h->elf.root.u.def.section->output_section == NULL)
7195 return ppc_stub_none;
7196 }
7197
7198 /* Determine where the call point is. */
7199 location = (input_sec->output_offset
7200 + input_sec->output_section->vma
7201 + rel->r_offset);
7202
7203 branch_offset = destination - location;
7204 r_type = ELF64_R_TYPE (rel->r_info);
7205
7206 /* Determine if a long branch stub is needed. */
7207 max_branch_offset = 1 << 25;
7208 if (r_type != R_PPC64_REL24)
7209 max_branch_offset = 1 << 15;
7210
7211 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7212 /* We need a stub. Figure out whether a long_branch or plt_branch
7213 is needed later. */
7214 return ppc_stub_long_branch;
7215
7216 return ppc_stub_none;
7217 }
7218
7219 /* Build a .plt call stub. */
7220
7221 static inline bfd_byte *
7222 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7223 {
7224 #define PPC_LO(v) ((v) & 0xffff)
7225 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7226 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7227
7228 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7229 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7230 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7231 if (PPC_HA (offset + 8) != PPC_HA (offset))
7232 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7233 offset += 8;
7234 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7235 if (PPC_HA (offset + 8) != PPC_HA (offset))
7236 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7237 offset += 8;
7238 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7239 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7240 bfd_put_32 (obfd, BCTR, p), p += 4;
7241 return p;
7242 }
7243
7244 static bfd_boolean
7245 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7246 {
7247 struct ppc_stub_hash_entry *stub_entry;
7248 struct ppc_branch_hash_entry *br_entry;
7249 struct bfd_link_info *info;
7250 struct ppc_link_hash_table *htab;
7251 bfd_byte *loc;
7252 bfd_byte *p;
7253 unsigned int indx;
7254 struct plt_entry *ent;
7255 bfd_vma off;
7256 int size;
7257
7258 /* Massage our args to the form they really have. */
7259 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7260 info = in_arg;
7261
7262 htab = ppc_hash_table (info);
7263
7264 /* Make a note of the offset within the stubs for this entry. */
7265 stub_entry->stub_offset = stub_entry->stub_sec->size;
7266 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7267
7268 htab->stub_count[stub_entry->stub_type - 1] += 1;
7269 switch (stub_entry->stub_type)
7270 {
7271 case ppc_stub_long_branch:
7272 case ppc_stub_long_branch_r2off:
7273 /* Branches are relative. This is where we are going to. */
7274 off = (stub_entry->target_value
7275 + stub_entry->target_section->output_offset
7276 + stub_entry->target_section->output_section->vma);
7277
7278 /* And this is where we are coming from. */
7279 off -= (stub_entry->stub_offset
7280 + stub_entry->stub_sec->output_offset
7281 + stub_entry->stub_sec->output_section->vma);
7282
7283 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7284 size = 4;
7285 else
7286 {
7287 bfd_vma r2off;
7288
7289 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7290 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7291 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7292 loc += 4;
7293 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7294 loc += 4;
7295 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7296 loc += 4;
7297 off -= 12;
7298 size = 16;
7299 }
7300 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7301
7302 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7303 break;
7304
7305 case ppc_stub_plt_branch:
7306 case ppc_stub_plt_branch_r2off:
7307 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7308 stub_entry->root.string + 9,
7309 FALSE, FALSE);
7310 if (br_entry == NULL)
7311 {
7312 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7313 stub_entry->root.string + 9);
7314 htab->stub_error = TRUE;
7315 return FALSE;
7316 }
7317
7318 off = (stub_entry->target_value
7319 + stub_entry->target_section->output_offset
7320 + stub_entry->target_section->output_section->vma);
7321
7322 bfd_put_64 (htab->brlt->owner, off,
7323 htab->brlt->contents + br_entry->offset);
7324
7325 if (info->shared)
7326 {
7327 /* Create a reloc for the branch lookup table entry. */
7328 Elf_Internal_Rela rela;
7329 bfd_byte *rl;
7330
7331 rela.r_offset = (br_entry->offset
7332 + htab->brlt->output_offset
7333 + htab->brlt->output_section->vma);
7334 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7335 rela.r_addend = off;
7336
7337 rl = htab->relbrlt->contents;
7338 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7339 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7340 }
7341
7342 off = (br_entry->offset
7343 + htab->brlt->output_offset
7344 + htab->brlt->output_section->vma
7345 - elf_gp (htab->brlt->output_section->owner)
7346 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7347
7348 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7349 {
7350 (*_bfd_error_handler)
7351 (_("linkage table error against `%s'"),
7352 stub_entry->root.string);
7353 bfd_set_error (bfd_error_bad_value);
7354 htab->stub_error = TRUE;
7355 return FALSE;
7356 }
7357
7358 indx = off;
7359 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7360 {
7361 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7362 loc += 4;
7363 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7364 size = 16;
7365 }
7366 else
7367 {
7368 bfd_vma r2off;
7369
7370 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7371 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7372 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7373 loc += 4;
7374 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7375 loc += 4;
7376 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7377 loc += 4;
7378 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7379 loc += 4;
7380 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7381 size = 28;
7382 }
7383 loc += 4;
7384 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7385 loc += 4;
7386 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7387 break;
7388
7389 case ppc_stub_plt_call:
7390 /* Do the best we can for shared libraries built without
7391 exporting ".foo" for each "foo". This can happen when symbol
7392 versioning scripts strip all bar a subset of symbols. */
7393 if (stub_entry->h->oh != NULL
7394 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7395 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7396 {
7397 /* Point the symbol at the stub. There may be multiple stubs,
7398 we don't really care; The main thing is to make this sym
7399 defined somewhere. Maybe defining the symbol in the stub
7400 section is a silly idea. If we didn't do this, htab->top_id
7401 could disappear. */
7402 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7403 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7404 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7405 }
7406
7407 /* Now build the stub. */
7408 off = (bfd_vma) -1;
7409 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7410 if (ent->addend == stub_entry->addend)
7411 {
7412 off = ent->plt.offset;
7413 break;
7414 }
7415 if (off >= (bfd_vma) -2)
7416 abort ();
7417
7418 off &= ~ (bfd_vma) 1;
7419 off += (htab->plt->output_offset
7420 + htab->plt->output_section->vma
7421 - elf_gp (htab->plt->output_section->owner)
7422 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7423
7424 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7425 {
7426 (*_bfd_error_handler)
7427 (_("linkage table error against `%s'"),
7428 stub_entry->h->elf.root.root.string);
7429 bfd_set_error (bfd_error_bad_value);
7430 htab->stub_error = TRUE;
7431 return FALSE;
7432 }
7433
7434 p = build_plt_stub (htab->stub_bfd, loc, off);
7435 size = p - loc;
7436 break;
7437
7438 default:
7439 BFD_FAIL ();
7440 return FALSE;
7441 }
7442
7443 stub_entry->stub_sec->size += size;
7444
7445 if (htab->emit_stub_syms
7446 && !(stub_entry->stub_type == ppc_stub_plt_call
7447 && stub_entry->h->oh != NULL
7448 && stub_entry->h->oh->elf.root.type == bfd_link_hash_defined
7449 && stub_entry->h->oh->elf.root.u.def.section == stub_entry->stub_sec
7450 && stub_entry->h->oh->elf.root.u.def.value == stub_entry->stub_offset))
7451 {
7452 struct elf_link_hash_entry *h;
7453 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
7454 TRUE, FALSE, FALSE);
7455 if (h == NULL)
7456 return FALSE;
7457 if (h->root.type == bfd_link_hash_new)
7458 {
7459 h->root.type = bfd_link_hash_defined;
7460 h->root.u.def.section = stub_entry->stub_sec;
7461 h->root.u.def.value = stub_entry->stub_offset;
7462 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7463 | ELF_LINK_HASH_DEF_REGULAR
7464 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7465 | ELF_LINK_FORCED_LOCAL);
7466 }
7467 }
7468
7469 return TRUE;
7470 }
7471
7472 /* As above, but don't actually build the stub. Just bump offset so
7473 we know stub section sizes, and select plt_branch stubs where
7474 long_branch stubs won't do. */
7475
7476 static bfd_boolean
7477 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7478 {
7479 struct ppc_stub_hash_entry *stub_entry;
7480 struct bfd_link_info *info;
7481 struct ppc_link_hash_table *htab;
7482 bfd_vma off;
7483 int size;
7484
7485 /* Massage our args to the form they really have. */
7486 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7487 info = in_arg;
7488
7489 htab = ppc_hash_table (info);
7490
7491 if (stub_entry->stub_type == ppc_stub_plt_call)
7492 {
7493 struct plt_entry *ent;
7494 off = (bfd_vma) -1;
7495 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7496 if (ent->addend == stub_entry->addend)
7497 {
7498 off = ent->plt.offset & ~(bfd_vma) 1;
7499 break;
7500 }
7501 if (off >= (bfd_vma) -2)
7502 abort ();
7503 off += (htab->plt->output_offset
7504 + htab->plt->output_section->vma
7505 - elf_gp (htab->plt->output_section->owner)
7506 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7507
7508 size = PLT_CALL_STUB_SIZE;
7509 if (PPC_HA (off + 16) != PPC_HA (off))
7510 size += 4;
7511 }
7512 else
7513 {
7514 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
7515 variants. */
7516 off = (stub_entry->target_value
7517 + stub_entry->target_section->output_offset
7518 + stub_entry->target_section->output_section->vma);
7519 off -= (stub_entry->stub_sec->size
7520 + stub_entry->stub_sec->output_offset
7521 + stub_entry->stub_sec->output_section->vma);
7522
7523 /* Reset the stub type from the plt variant in case we now
7524 can reach with a shorter stub. */
7525 if (stub_entry->stub_type >= ppc_stub_plt_branch)
7526 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
7527
7528 size = 4;
7529 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
7530 {
7531 off -= 12;
7532 size = 16;
7533 }
7534
7535 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
7536 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
7537 {
7538 struct ppc_branch_hash_entry *br_entry;
7539
7540 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7541 stub_entry->root.string + 9,
7542 TRUE, FALSE);
7543 if (br_entry == NULL)
7544 {
7545 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
7546 stub_entry->root.string + 9);
7547 htab->stub_error = TRUE;
7548 return FALSE;
7549 }
7550
7551 if (br_entry->iter != htab->stub_iteration)
7552 {
7553 br_entry->iter = htab->stub_iteration;
7554 br_entry->offset = htab->brlt->size;
7555 htab->brlt->size += 8;
7556
7557 if (info->shared)
7558 htab->relbrlt->size += sizeof (Elf64_External_Rela);
7559 }
7560
7561 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
7562 size = 16;
7563 if (stub_entry->stub_type != ppc_stub_plt_branch)
7564 size = 28;
7565 }
7566 }
7567
7568 stub_entry->stub_sec->size += size;
7569 return TRUE;
7570 }
7571
7572 /* Set up various things so that we can make a list of input sections
7573 for each output section included in the link. Returns -1 on error,
7574 0 when no stubs will be needed, and 1 on success. */
7575
7576 int
7577 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
7578 {
7579 bfd *input_bfd;
7580 int top_id, top_index, id;
7581 asection *section;
7582 asection **input_list;
7583 bfd_size_type amt;
7584 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7585
7586 if (htab->brlt == NULL)
7587 return 0;
7588
7589 /* Find the top input section id. */
7590 for (input_bfd = info->input_bfds, top_id = 3;
7591 input_bfd != NULL;
7592 input_bfd = input_bfd->link_next)
7593 {
7594 for (section = input_bfd->sections;
7595 section != NULL;
7596 section = section->next)
7597 {
7598 if (top_id < section->id)
7599 top_id = section->id;
7600 }
7601 }
7602
7603 htab->top_id = top_id;
7604 amt = sizeof (struct map_stub) * (top_id + 1);
7605 htab->stub_group = bfd_zmalloc (amt);
7606 if (htab->stub_group == NULL)
7607 return -1;
7608
7609 /* Set toc_off for com, und, abs and ind sections. */
7610 for (id = 0; id < 3; id++)
7611 htab->stub_group[id].toc_off = TOC_BASE_OFF;
7612
7613 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
7614
7615 /* We can't use output_bfd->section_count here to find the top output
7616 section index as some sections may have been removed, and
7617 _bfd_strip_section_from_output doesn't renumber the indices. */
7618 for (section = output_bfd->sections, top_index = 0;
7619 section != NULL;
7620 section = section->next)
7621 {
7622 if (top_index < section->index)
7623 top_index = section->index;
7624 }
7625
7626 htab->top_index = top_index;
7627 amt = sizeof (asection *) * (top_index + 1);
7628 input_list = bfd_zmalloc (amt);
7629 htab->input_list = input_list;
7630 if (input_list == NULL)
7631 return -1;
7632
7633 return 1;
7634 }
7635
7636 /* The linker repeatedly calls this function for each TOC input section
7637 and linker generated GOT section. Group input bfds such that the toc
7638 within a group is less than 64k in size. Will break with cute linker
7639 scripts that play games with dot in the output toc section. */
7640
7641 void
7642 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
7643 {
7644 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7645 bfd_vma addr = isec->output_offset + isec->output_section->vma;
7646 bfd_vma off = addr - htab->toc_curr;
7647
7648 if (off + isec->size > 0x10000)
7649 htab->toc_curr = addr;
7650
7651 elf_gp (isec->owner) = (htab->toc_curr
7652 - elf_gp (isec->output_section->owner)
7653 + TOC_BASE_OFF);
7654 }
7655
7656 /* Called after the last call to the above function. */
7657
7658 void
7659 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
7660 struct bfd_link_info *info)
7661 {
7662 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7663
7664 /* toc_curr tracks the TOC offset used for code sections below in
7665 ppc64_elf_next_input_section. Start off at 0x8000. */
7666 htab->toc_curr = TOC_BASE_OFF;
7667 }
7668
7669 /* No toc references were found in ISEC. If the code in ISEC makes no
7670 calls, then there's no need to use toc adjusting stubs when branching
7671 into ISEC. Actually, indirect calls from ISEC are OK as they will
7672 load r2. */
7673
7674 static int
7675 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
7676 {
7677 bfd_byte *contents;
7678 bfd_size_type i;
7679 int ret;
7680 int branch_ok;
7681
7682 /* We know none of our code bearing sections will need toc stubs. */
7683 if ((isec->flags & SEC_LINKER_CREATED) != 0)
7684 return 0;
7685
7686 if (isec->size == 0)
7687 return 0;
7688
7689 /* Hack for linux kernel. .fixup contains branches, but only back to
7690 the function that hit an exception. */
7691 branch_ok = strcmp (isec->name, ".fixup") == 0;
7692
7693 contents = elf_section_data (isec)->this_hdr.contents;
7694 if (contents == NULL)
7695 {
7696 if (!bfd_malloc_and_get_section (isec->owner, isec, &contents))
7697 {
7698 if (contents != NULL)
7699 free (contents);
7700 return -1;
7701 }
7702 if (info->keep_memory)
7703 elf_section_data (isec)->this_hdr.contents = contents;
7704 }
7705
7706 /* Code scan, because we don't necessarily have relocs on calls to
7707 static functions. */
7708 ret = 0;
7709 for (i = 0; i < isec->size; i += 4)
7710 {
7711 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
7712 /* Is this a branch? */
7713 if ((insn & (0x3f << 26)) == (18 << 26)
7714 /* If branch and link, it's a function call. */
7715 && ((insn & 1) != 0
7716 /* Sibling calls use a plain branch. I don't know a way
7717 of deciding whether a branch is really a sibling call. */
7718 || !branch_ok))
7719 {
7720 ret = 1;
7721 break;
7722 }
7723 }
7724
7725 if (elf_section_data (isec)->this_hdr.contents != contents)
7726 free (contents);
7727 return ret;
7728 }
7729
7730 /* The linker repeatedly calls this function for each input section,
7731 in the order that input sections are linked into output sections.
7732 Build lists of input sections to determine groupings between which
7733 we may insert linker stubs. */
7734
7735 bfd_boolean
7736 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
7737 {
7738 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7739 int ret;
7740
7741 if ((isec->output_section->flags & SEC_CODE) != 0
7742 && isec->output_section->index <= htab->top_index)
7743 {
7744 asection **list = htab->input_list + isec->output_section->index;
7745 /* Steal the link_sec pointer for our list. */
7746 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
7747 /* This happens to make the list in reverse order,
7748 which is what we want. */
7749 PREV_SEC (isec) = *list;
7750 *list = isec;
7751 }
7752
7753 /* If a code section has a function that uses the TOC then we need
7754 to use the right TOC (obviously). Also, make sure that .opd gets
7755 the correct TOC value for R_PPC64_TOC relocs that don't have or
7756 can't find their function symbol (shouldn't ever happen now). */
7757 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
7758 {
7759 if (elf_gp (isec->owner) != 0)
7760 htab->toc_curr = elf_gp (isec->owner);
7761 }
7762 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
7763 return FALSE;
7764 else
7765 isec->has_gp_reloc = ret;
7766
7767 /* Functions that don't use the TOC can belong in any TOC group.
7768 Use the last TOC base. This happens to make _init and _fini
7769 pasting work. */
7770 htab->stub_group[isec->id].toc_off = htab->toc_curr;
7771 return TRUE;
7772 }
7773
7774 /* See whether we can group stub sections together. Grouping stub
7775 sections may result in fewer stubs. More importantly, we need to
7776 put all .init* and .fini* stubs at the beginning of the .init or
7777 .fini output sections respectively, because glibc splits the
7778 _init and _fini functions into multiple parts. Putting a stub in
7779 the middle of a function is not a good idea. */
7780
7781 static void
7782 group_sections (struct ppc_link_hash_table *htab,
7783 bfd_size_type stub_group_size,
7784 bfd_boolean stubs_always_before_branch)
7785 {
7786 asection **list = htab->input_list + htab->top_index;
7787 do
7788 {
7789 asection *tail = *list;
7790 while (tail != NULL)
7791 {
7792 asection *curr;
7793 asection *prev;
7794 bfd_size_type total;
7795 bfd_boolean big_sec;
7796 bfd_vma curr_toc;
7797
7798 curr = tail;
7799 total = tail->size;
7800 big_sec = total >= stub_group_size;
7801 curr_toc = htab->stub_group[tail->id].toc_off;
7802
7803 while ((prev = PREV_SEC (curr)) != NULL
7804 && ((total += curr->output_offset - prev->output_offset)
7805 < stub_group_size)
7806 && htab->stub_group[prev->id].toc_off == curr_toc)
7807 curr = prev;
7808
7809 /* OK, the size from the start of CURR to the end is less
7810 than stub_group_size and thus can be handled by one stub
7811 section. (or the tail section is itself larger than
7812 stub_group_size, in which case we may be toast.) We
7813 should really be keeping track of the total size of stubs
7814 added here, as stubs contribute to the final output
7815 section size. That's a little tricky, and this way will
7816 only break if stubs added make the total size more than
7817 2^25, ie. for the default stub_group_size, if stubs total
7818 more than 2097152 bytes, or nearly 75000 plt call stubs. */
7819 do
7820 {
7821 prev = PREV_SEC (tail);
7822 /* Set up this stub group. */
7823 htab->stub_group[tail->id].link_sec = curr;
7824 }
7825 while (tail != curr && (tail = prev) != NULL);
7826
7827 /* But wait, there's more! Input sections up to stub_group_size
7828 bytes before the stub section can be handled by it too.
7829 Don't do this if we have a really large section after the
7830 stubs, as adding more stubs increases the chance that
7831 branches may not reach into the stub section. */
7832 if (!stubs_always_before_branch && !big_sec)
7833 {
7834 total = 0;
7835 while (prev != NULL
7836 && ((total += tail->output_offset - prev->output_offset)
7837 < stub_group_size)
7838 && htab->stub_group[prev->id].toc_off == curr_toc)
7839 {
7840 tail = prev;
7841 prev = PREV_SEC (tail);
7842 htab->stub_group[tail->id].link_sec = curr;
7843 }
7844 }
7845 tail = prev;
7846 }
7847 }
7848 while (list-- != htab->input_list);
7849 free (htab->input_list);
7850 #undef PREV_SEC
7851 }
7852
7853 /* Determine and set the size of the stub section for a final link.
7854
7855 The basic idea here is to examine all the relocations looking for
7856 PC-relative calls to a target that is unreachable with a "bl"
7857 instruction. */
7858
7859 bfd_boolean
7860 ppc64_elf_size_stubs (bfd *output_bfd,
7861 struct bfd_link_info *info,
7862 bfd_signed_vma group_size,
7863 asection *(*add_stub_section) (const char *, asection *),
7864 void (*layout_sections_again) (void))
7865 {
7866 bfd_size_type stub_group_size;
7867 bfd_boolean stubs_always_before_branch;
7868 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7869
7870 /* Stash our params away. */
7871 htab->add_stub_section = add_stub_section;
7872 htab->layout_sections_again = layout_sections_again;
7873 stubs_always_before_branch = group_size < 0;
7874 if (group_size < 0)
7875 stub_group_size = -group_size;
7876 else
7877 stub_group_size = group_size;
7878 if (stub_group_size == 1)
7879 {
7880 /* Default values. */
7881 if (stubs_always_before_branch)
7882 {
7883 stub_group_size = 0x1e00000;
7884 if (htab->has_14bit_branch)
7885 stub_group_size = 0x7800;
7886 }
7887 else
7888 {
7889 stub_group_size = 0x1c00000;
7890 if (htab->has_14bit_branch)
7891 stub_group_size = 0x7000;
7892 }
7893 }
7894
7895 group_sections (htab, stub_group_size, stubs_always_before_branch);
7896
7897 while (1)
7898 {
7899 bfd *input_bfd;
7900 unsigned int bfd_indx;
7901 asection *stub_sec;
7902 bfd_boolean stub_changed;
7903
7904 htab->stub_iteration += 1;
7905 stub_changed = FALSE;
7906
7907 for (input_bfd = info->input_bfds, bfd_indx = 0;
7908 input_bfd != NULL;
7909 input_bfd = input_bfd->link_next, bfd_indx++)
7910 {
7911 Elf_Internal_Shdr *symtab_hdr;
7912 asection *section;
7913 Elf_Internal_Sym *local_syms = NULL;
7914
7915 /* We'll need the symbol table in a second. */
7916 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7917 if (symtab_hdr->sh_info == 0)
7918 continue;
7919
7920 /* Walk over each section attached to the input bfd. */
7921 for (section = input_bfd->sections;
7922 section != NULL;
7923 section = section->next)
7924 {
7925 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
7926
7927 /* If there aren't any relocs, then there's nothing more
7928 to do. */
7929 if ((section->flags & SEC_RELOC) == 0
7930 || section->reloc_count == 0)
7931 continue;
7932
7933 /* If this section is a link-once section that will be
7934 discarded, then don't create any stubs. */
7935 if (section->output_section == NULL
7936 || section->output_section->owner != output_bfd)
7937 continue;
7938
7939 /* Get the relocs. */
7940 internal_relocs
7941 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
7942 info->keep_memory);
7943 if (internal_relocs == NULL)
7944 goto error_ret_free_local;
7945
7946 /* Now examine each relocation. */
7947 irela = internal_relocs;
7948 irelaend = irela + section->reloc_count;
7949 for (; irela < irelaend; irela++)
7950 {
7951 enum elf_ppc64_reloc_type r_type;
7952 unsigned int r_indx;
7953 enum ppc_stub_type stub_type;
7954 struct ppc_stub_hash_entry *stub_entry;
7955 asection *sym_sec, *code_sec;
7956 bfd_vma sym_value;
7957 bfd_vma destination;
7958 bfd_boolean ok_dest;
7959 struct ppc_link_hash_entry *hash;
7960 struct ppc_link_hash_entry *fdh;
7961 struct elf_link_hash_entry *h;
7962 Elf_Internal_Sym *sym;
7963 char *stub_name;
7964 const asection *id_sec;
7965 long *opd_adjust;
7966
7967 r_type = ELF64_R_TYPE (irela->r_info);
7968 r_indx = ELF64_R_SYM (irela->r_info);
7969
7970 if (r_type >= R_PPC64_max)
7971 {
7972 bfd_set_error (bfd_error_bad_value);
7973 goto error_ret_free_internal;
7974 }
7975
7976 /* Only look for stubs on branch instructions. */
7977 if (r_type != R_PPC64_REL24
7978 && r_type != R_PPC64_REL14
7979 && r_type != R_PPC64_REL14_BRTAKEN
7980 && r_type != R_PPC64_REL14_BRNTAKEN)
7981 continue;
7982
7983 /* Now determine the call target, its name, value,
7984 section. */
7985 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7986 r_indx, input_bfd))
7987 goto error_ret_free_internal;
7988 hash = (struct ppc_link_hash_entry *) h;
7989
7990 ok_dest = FALSE;
7991 fdh = NULL;
7992 if (hash == NULL)
7993 {
7994 sym_value = sym->st_value;
7995 ok_dest = TRUE;
7996 }
7997 else
7998 {
7999 sym_value = 0;
8000 /* Recognise an old ABI func code entry sym, and
8001 use the func descriptor sym instead. */
8002 if (hash->elf.root.type == bfd_link_hash_undefweak
8003 && hash->elf.root.root.string[0] == '.'
8004 && (fdh = get_fdh (hash, htab)) != NULL)
8005 {
8006 if (fdh->elf.root.type == bfd_link_hash_defined
8007 || fdh->elf.root.type == bfd_link_hash_defweak)
8008 {
8009 sym_sec = fdh->elf.root.u.def.section;
8010 sym_value = fdh->elf.root.u.def.value;
8011 if (sym_sec->output_section != NULL)
8012 ok_dest = TRUE;
8013 }
8014 else
8015 fdh = NULL;
8016 }
8017 else if (hash->elf.root.type == bfd_link_hash_defined
8018 || hash->elf.root.type == bfd_link_hash_defweak)
8019 {
8020 sym_value = hash->elf.root.u.def.value;
8021 if (sym_sec->output_section != NULL)
8022 ok_dest = TRUE;
8023 }
8024 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8025 ;
8026 else if (hash->elf.root.type == bfd_link_hash_undefined)
8027 ;
8028 else
8029 {
8030 bfd_set_error (bfd_error_bad_value);
8031 goto error_ret_free_internal;
8032 }
8033 }
8034
8035 destination = 0;
8036 if (ok_dest)
8037 {
8038 sym_value += irela->r_addend;
8039 destination = (sym_value
8040 + sym_sec->output_offset
8041 + sym_sec->output_section->vma);
8042 }
8043
8044 code_sec = sym_sec;
8045 opd_adjust = get_opd_info (sym_sec);
8046 if (opd_adjust != NULL)
8047 {
8048 bfd_vma dest;
8049
8050 if (hash == NULL)
8051 {
8052 long adjust = opd_adjust[sym_value / 8];
8053 if (adjust == -1)
8054 continue;
8055 sym_value += adjust;
8056 }
8057 dest = opd_entry_value (sym_sec, sym_value,
8058 &code_sec, &sym_value);
8059 if (dest != (bfd_vma) -1)
8060 {
8061 destination = dest;
8062 if (fdh != NULL)
8063 {
8064 /* Fixup old ABI sym to point at code
8065 entry. */
8066 hash->elf.root.type = bfd_link_hash_defweak;
8067 hash->elf.root.u.def.section = code_sec;
8068 hash->elf.root.u.def.value = sym_value;
8069 }
8070 }
8071 }
8072
8073 /* Determine what (if any) linker stub is needed. */
8074 stub_type = ppc_type_of_stub (section, irela, &hash,
8075 destination);
8076
8077 if (stub_type != ppc_stub_plt_call)
8078 {
8079 /* Check whether we need a TOC adjusting stub.
8080 Since the linker pastes together pieces from
8081 different object files when creating the
8082 _init and _fini functions, it may be that a
8083 call to what looks like a local sym is in
8084 fact a call needing a TOC adjustment. */
8085 if (code_sec != NULL
8086 && code_sec->output_section != NULL
8087 && (htab->stub_group[code_sec->id].toc_off
8088 != htab->stub_group[section->id].toc_off)
8089 && code_sec->has_gp_reloc
8090 && section->has_gp_reloc)
8091 stub_type = ppc_stub_long_branch_r2off;
8092 }
8093
8094 if (stub_type == ppc_stub_none)
8095 continue;
8096
8097 /* __tls_get_addr calls might be eliminated. */
8098 if (stub_type != ppc_stub_plt_call
8099 && hash != NULL
8100 && (hash == htab->tls_get_addr
8101 || hash == htab->tls_get_addr_fd)
8102 && section->has_tls_reloc
8103 && irela != internal_relocs)
8104 {
8105 /* Get tls info. */
8106 char *tls_mask;
8107
8108 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8109 irela - 1, input_bfd))
8110 goto error_ret_free_internal;
8111 if (*tls_mask != 0)
8112 continue;
8113 }
8114
8115 /* Support for grouping stub sections. */
8116 id_sec = htab->stub_group[section->id].link_sec;
8117
8118 /* Get the name of this stub. */
8119 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8120 if (!stub_name)
8121 goto error_ret_free_internal;
8122
8123 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8124 stub_name, FALSE, FALSE);
8125 if (stub_entry != NULL)
8126 {
8127 /* The proper stub has already been created. */
8128 free (stub_name);
8129 continue;
8130 }
8131
8132 stub_entry = ppc_add_stub (stub_name, section, htab);
8133 if (stub_entry == NULL)
8134 {
8135 free (stub_name);
8136 error_ret_free_internal:
8137 if (elf_section_data (section)->relocs == NULL)
8138 free (internal_relocs);
8139 error_ret_free_local:
8140 if (local_syms != NULL
8141 && (symtab_hdr->contents
8142 != (unsigned char *) local_syms))
8143 free (local_syms);
8144 return FALSE;
8145 }
8146
8147 stub_entry->stub_type = stub_type;
8148 stub_entry->target_value = sym_value;
8149 stub_entry->target_section = code_sec;
8150 stub_entry->h = hash;
8151 stub_entry->addend = irela->r_addend;
8152 stub_changed = TRUE;
8153 }
8154
8155 /* We're done with the internal relocs, free them. */
8156 if (elf_section_data (section)->relocs != internal_relocs)
8157 free (internal_relocs);
8158 }
8159
8160 if (local_syms != NULL
8161 && symtab_hdr->contents != (unsigned char *) local_syms)
8162 {
8163 if (!info->keep_memory)
8164 free (local_syms);
8165 else
8166 symtab_hdr->contents = (unsigned char *) local_syms;
8167 }
8168 }
8169
8170 if (!stub_changed)
8171 break;
8172
8173 /* OK, we've added some stubs. Find out the new size of the
8174 stub sections. */
8175 for (stub_sec = htab->stub_bfd->sections;
8176 stub_sec != NULL;
8177 stub_sec = stub_sec->next)
8178 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8179 stub_sec->size = 0;
8180
8181 htab->brlt->size = 0;
8182 if (info->shared)
8183 htab->relbrlt->size = 0;
8184
8185 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8186
8187 /* Ask the linker to do its stuff. */
8188 (*htab->layout_sections_again) ();
8189 }
8190
8191 /* It would be nice to strip .branch_lt from the output if the
8192 section is empty, but it's too late. If we strip sections here,
8193 the dynamic symbol table is corrupted since the section symbol
8194 for the stripped section isn't written. */
8195
8196 return TRUE;
8197 }
8198
8199 /* Called after we have determined section placement. If sections
8200 move, we'll be called again. Provide a value for TOCstart. */
8201
8202 bfd_vma
8203 ppc64_elf_toc (bfd *obfd)
8204 {
8205 asection *s;
8206 bfd_vma TOCstart;
8207
8208 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8209 order. The TOC starts where the first of these sections starts. */
8210 s = bfd_get_section_by_name (obfd, ".got");
8211 if (s == NULL)
8212 s = bfd_get_section_by_name (obfd, ".toc");
8213 if (s == NULL)
8214 s = bfd_get_section_by_name (obfd, ".tocbss");
8215 if (s == NULL)
8216 s = bfd_get_section_by_name (obfd, ".plt");
8217 if (s == NULL)
8218 {
8219 /* This may happen for
8220 o references to TOC base (SYM@toc / TOC[tc0]) without a
8221 .toc directive
8222 o bad linker script
8223 o --gc-sections and empty TOC sections
8224
8225 FIXME: Warn user? */
8226
8227 /* Look for a likely section. We probably won't even be
8228 using TOCstart. */
8229 for (s = obfd->sections; s != NULL; s = s->next)
8230 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8231 == (SEC_ALLOC | SEC_SMALL_DATA))
8232 break;
8233 if (s == NULL)
8234 for (s = obfd->sections; s != NULL; s = s->next)
8235 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8236 == (SEC_ALLOC | SEC_SMALL_DATA))
8237 break;
8238 if (s == NULL)
8239 for (s = obfd->sections; s != NULL; s = s->next)
8240 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8241 break;
8242 if (s == NULL)
8243 for (s = obfd->sections; s != NULL; s = s->next)
8244 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8245 break;
8246 }
8247
8248 TOCstart = 0;
8249 if (s != NULL)
8250 TOCstart = s->output_section->vma + s->output_offset;
8251
8252 return TOCstart;
8253 }
8254
8255 /* Build all the stubs associated with the current output file.
8256 The stubs are kept in a hash table attached to the main linker
8257 hash table. This function is called via gldelf64ppc_finish. */
8258
8259 bfd_boolean
8260 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8261 struct bfd_link_info *info,
8262 char **stats)
8263 {
8264 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8265 asection *stub_sec;
8266 bfd_byte *p;
8267 int stub_sec_count = 0;
8268
8269 htab->emit_stub_syms = emit_stub_syms;
8270
8271 /* Allocate memory to hold the linker stubs. */
8272 for (stub_sec = htab->stub_bfd->sections;
8273 stub_sec != NULL;
8274 stub_sec = stub_sec->next)
8275 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
8276 && stub_sec->size != 0)
8277 {
8278 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
8279 if (stub_sec->contents == NULL)
8280 return FALSE;
8281 /* We want to check that built size is the same as calculated
8282 size. rawsize is a convenient location to use. */
8283 stub_sec->rawsize = stub_sec->size;
8284 stub_sec->size = 0;
8285 }
8286
8287 if (htab->plt != NULL)
8288 {
8289 unsigned int indx;
8290 bfd_vma plt0;
8291
8292 /* Build the .glink plt call stub. */
8293 plt0 = (htab->plt->output_section->vma
8294 + htab->plt->output_offset
8295 - (htab->glink->output_section->vma
8296 + htab->glink->output_offset
8297 + GLINK_CALL_STUB_SIZE));
8298 if (plt0 + 0x80008000 > 0xffffffff)
8299 {
8300 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
8301 bfd_set_error (bfd_error_bad_value);
8302 return FALSE;
8303 }
8304
8305 if (htab->emit_stub_syms)
8306 {
8307 struct elf_link_hash_entry *h;
8308 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
8309 if (h == NULL)
8310 return FALSE;
8311 if (h->root.type == bfd_link_hash_new)
8312 {
8313 h->root.type = bfd_link_hash_defined;
8314 h->root.u.def.section = htab->glink;
8315 h->root.u.def.value = 0;
8316 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
8317 | ELF_LINK_HASH_DEF_REGULAR
8318 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
8319 | ELF_LINK_FORCED_LOCAL);
8320 }
8321 }
8322 p = htab->glink->contents;
8323 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
8324 p += 4;
8325 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
8326 p += 4;
8327 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
8328 p += 4;
8329 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8330 p += 4;
8331 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
8332 p += 4;
8333 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
8334 p += 4;
8335 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
8336 p += 4;
8337 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8338 p += 4;
8339 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
8340 p += 4;
8341 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
8342 p += 4;
8343 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
8344 p += 4;
8345 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
8346 p += 4;
8347 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
8348 p += 4;
8349 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
8350 p += 4;
8351 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
8352 p += 4;
8353 bfd_put_32 (htab->glink->owner, BCTR, p);
8354 p += 4;
8355
8356 /* Build the .glink lazy link call stubs. */
8357 indx = 0;
8358 while (p < htab->glink->contents + htab->glink->size)
8359 {
8360 if (indx < 0x8000)
8361 {
8362 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
8363 p += 4;
8364 }
8365 else
8366 {
8367 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
8368 p += 4;
8369 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
8370 p += 4;
8371 }
8372 bfd_put_32 (htab->glink->owner,
8373 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
8374 indx++;
8375 p += 4;
8376 }
8377 htab->glink->rawsize = p - htab->glink->contents;
8378 }
8379
8380 if (htab->brlt->size != 0)
8381 {
8382 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
8383 htab->brlt->size);
8384 if (htab->brlt->contents == NULL)
8385 return FALSE;
8386 }
8387 if (info->shared && htab->relbrlt->size != 0)
8388 {
8389 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
8390 htab->relbrlt->size);
8391 if (htab->relbrlt->contents == NULL)
8392 return FALSE;
8393 }
8394
8395 /* Build the stubs as directed by the stub hash table. */
8396 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
8397
8398 for (stub_sec = htab->stub_bfd->sections;
8399 stub_sec != NULL;
8400 stub_sec = stub_sec->next)
8401 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8402 {
8403 stub_sec_count += 1;
8404 if (stub_sec->rawsize != stub_sec->size)
8405 break;
8406 }
8407
8408 if (stub_sec != NULL
8409 || htab->glink->rawsize != htab->glink->size)
8410 {
8411 htab->stub_error = TRUE;
8412 (*_bfd_error_handler) (_("stubs don't match calculated size"));
8413 }
8414
8415 if (htab->stub_error)
8416 return FALSE;
8417
8418 if (stats != NULL)
8419 {
8420 *stats = bfd_malloc (500);
8421 if (*stats == NULL)
8422 return FALSE;
8423
8424 sprintf (*stats, _("linker stubs in %u groups\n"
8425 " branch %lu\n"
8426 " toc adjust %lu\n"
8427 " long branch %lu\n"
8428 " long toc adj %lu\n"
8429 " plt call %lu"),
8430 stub_sec_count,
8431 htab->stub_count[ppc_stub_long_branch - 1],
8432 htab->stub_count[ppc_stub_long_branch_r2off - 1],
8433 htab->stub_count[ppc_stub_plt_branch - 1],
8434 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
8435 htab->stub_count[ppc_stub_plt_call - 1]);
8436 }
8437 return TRUE;
8438 }
8439
8440 /* This function undoes the changes made by add_symbol_adjust. */
8441
8442 static bfd_boolean
8443 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
8444 {
8445 struct ppc_link_hash_entry *eh;
8446
8447 if (h->root.type == bfd_link_hash_indirect)
8448 return TRUE;
8449
8450 if (h->root.type == bfd_link_hash_warning)
8451 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8452
8453 eh = (struct ppc_link_hash_entry *) h;
8454 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
8455 return TRUE;
8456
8457 eh->elf.root.type = bfd_link_hash_undefined;
8458 return TRUE;
8459 }
8460
8461 void
8462 ppc64_elf_restore_symbols (struct bfd_link_info *info)
8463 {
8464 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8465 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
8466 }
8467
8468 /* The RELOCATE_SECTION function is called by the ELF backend linker
8469 to handle the relocations for a section.
8470
8471 The relocs are always passed as Rela structures; if the section
8472 actually uses Rel structures, the r_addend field will always be
8473 zero.
8474
8475 This function is responsible for adjust the section contents as
8476 necessary, and (if using Rela relocs and generating a
8477 relocatable output file) adjusting the reloc addend as
8478 necessary.
8479
8480 This function does not have to worry about setting the reloc
8481 address or the reloc symbol index.
8482
8483 LOCAL_SYMS is a pointer to the swapped in local symbols.
8484
8485 LOCAL_SECTIONS is an array giving the section in the input file
8486 corresponding to the st_shndx field of each local symbol.
8487
8488 The global hash table entry for the global symbols can be found
8489 via elf_sym_hashes (input_bfd).
8490
8491 When generating relocatable output, this function must handle
8492 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8493 going to be the section symbol corresponding to the output
8494 section, which means that the addend must be adjusted
8495 accordingly. */
8496
8497 static bfd_boolean
8498 ppc64_elf_relocate_section (bfd *output_bfd,
8499 struct bfd_link_info *info,
8500 bfd *input_bfd,
8501 asection *input_section,
8502 bfd_byte *contents,
8503 Elf_Internal_Rela *relocs,
8504 Elf_Internal_Sym *local_syms,
8505 asection **local_sections)
8506 {
8507 struct ppc_link_hash_table *htab;
8508 Elf_Internal_Shdr *symtab_hdr;
8509 struct elf_link_hash_entry **sym_hashes;
8510 Elf_Internal_Rela *rel;
8511 Elf_Internal_Rela *relend;
8512 Elf_Internal_Rela outrel;
8513 bfd_byte *loc;
8514 struct got_entry **local_got_ents;
8515 bfd_vma TOCstart;
8516 bfd_boolean ret = TRUE;
8517 bfd_boolean is_opd;
8518 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
8519 bfd_boolean is_power4 = FALSE;
8520
8521 if (info->relocatable)
8522 return TRUE;
8523
8524 /* Initialize howto table if needed. */
8525 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8526 ppc_howto_init ();
8527
8528 htab = ppc_hash_table (info);
8529 local_got_ents = elf_local_got_ents (input_bfd);
8530 TOCstart = elf_gp (output_bfd);
8531 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8532 sym_hashes = elf_sym_hashes (input_bfd);
8533 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
8534
8535 rel = relocs;
8536 relend = relocs + input_section->reloc_count;
8537 for (; rel < relend; rel++)
8538 {
8539 enum elf_ppc64_reloc_type r_type;
8540 bfd_vma addend;
8541 bfd_reloc_status_type r;
8542 Elf_Internal_Sym *sym;
8543 asection *sec;
8544 struct elf_link_hash_entry *h_elf;
8545 struct ppc_link_hash_entry *h;
8546 struct ppc_link_hash_entry *fdh;
8547 const char *sym_name;
8548 unsigned long r_symndx, toc_symndx;
8549 char tls_mask, tls_gd, tls_type;
8550 char sym_type;
8551 bfd_vma relocation;
8552 bfd_boolean unresolved_reloc;
8553 bfd_boolean warned;
8554 unsigned long insn, mask;
8555 struct ppc_stub_hash_entry *stub_entry;
8556 bfd_vma max_br_offset;
8557 bfd_vma from;
8558
8559 r_type = ELF64_R_TYPE (rel->r_info);
8560 r_symndx = ELF64_R_SYM (rel->r_info);
8561
8562 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
8563 symbol of the previous ADDR64 reloc. The symbol gives us the
8564 proper TOC base to use. */
8565 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
8566 && rel != relocs
8567 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
8568 && is_opd)
8569 r_symndx = ELF64_R_SYM (rel[-1].r_info);
8570
8571 sym = NULL;
8572 sec = NULL;
8573 h_elf = NULL;
8574 sym_name = NULL;
8575 unresolved_reloc = FALSE;
8576 warned = FALSE;
8577
8578 if (r_symndx < symtab_hdr->sh_info)
8579 {
8580 /* It's a local symbol. */
8581 long *opd_adjust;
8582
8583 sym = local_syms + r_symndx;
8584 sec = local_sections[r_symndx];
8585 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
8586 sym_type = ELF64_ST_TYPE (sym->st_info);
8587 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8588 opd_adjust = get_opd_info (sec);
8589 if (opd_adjust != NULL)
8590 {
8591 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
8592 if (adjust == -1)
8593 relocation = 0;
8594 else
8595 relocation += adjust;
8596 }
8597 }
8598 else
8599 {
8600 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8601 r_symndx, symtab_hdr, sym_hashes,
8602 h_elf, sec, relocation,
8603 unresolved_reloc, warned);
8604 sym_name = h_elf->root.root.string;
8605 sym_type = h_elf->type;
8606 }
8607 h = (struct ppc_link_hash_entry *) h_elf;
8608
8609 /* TLS optimizations. Replace instruction sequences and relocs
8610 based on information we collected in tls_optimize. We edit
8611 RELOCS so that --emit-relocs will output something sensible
8612 for the final instruction stream. */
8613 tls_mask = 0;
8614 tls_gd = 0;
8615 toc_symndx = 0;
8616 if (IS_PPC64_TLS_RELOC (r_type))
8617 {
8618 if (h != NULL)
8619 tls_mask = h->tls_mask;
8620 else if (local_got_ents != NULL)
8621 {
8622 char *lgot_masks;
8623 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
8624 tls_mask = lgot_masks[r_symndx];
8625 }
8626 if (tls_mask == 0 && r_type == R_PPC64_TLS)
8627 {
8628 /* Check for toc tls entries. */
8629 char *toc_tls;
8630
8631 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8632 rel, input_bfd))
8633 return FALSE;
8634
8635 if (toc_tls)
8636 tls_mask = *toc_tls;
8637 }
8638 }
8639
8640 /* Check that tls relocs are used with tls syms, and non-tls
8641 relocs are used with non-tls syms. */
8642 if (r_symndx != 0
8643 && r_type != R_PPC64_NONE
8644 && (h == NULL
8645 || h->elf.root.type == bfd_link_hash_defined
8646 || h->elf.root.type == bfd_link_hash_defweak)
8647 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
8648 {
8649 if (r_type == R_PPC64_TLS && tls_mask != 0)
8650 /* R_PPC64_TLS is OK against a symbol in the TOC. */
8651 ;
8652 else
8653 (*_bfd_error_handler)
8654 (sym_type == STT_TLS
8655 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
8656 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
8657 input_bfd,
8658 input_section,
8659 (long) rel->r_offset,
8660 ppc64_elf_howto_table[r_type]->name,
8661 sym_name);
8662 }
8663
8664 /* Ensure reloc mapping code below stays sane. */
8665 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
8666 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
8667 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
8668 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
8669 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
8670 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
8671 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
8672 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
8673 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
8674 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
8675 abort ();
8676
8677 switch (r_type)
8678 {
8679 default:
8680 break;
8681
8682 case R_PPC64_TOC16:
8683 case R_PPC64_TOC16_LO:
8684 case R_PPC64_TOC16_DS:
8685 case R_PPC64_TOC16_LO_DS:
8686 {
8687 /* Check for toc tls entries. */
8688 char *toc_tls;
8689 int retval;
8690
8691 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8692 rel, input_bfd);
8693 if (retval == 0)
8694 return FALSE;
8695
8696 if (toc_tls)
8697 {
8698 tls_mask = *toc_tls;
8699 if (r_type == R_PPC64_TOC16_DS
8700 || r_type == R_PPC64_TOC16_LO_DS)
8701 {
8702 if (tls_mask != 0
8703 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
8704 goto toctprel;
8705 }
8706 else
8707 {
8708 /* If we found a GD reloc pair, then we might be
8709 doing a GD->IE transition. */
8710 if (retval == 2)
8711 {
8712 tls_gd = TLS_TPRELGD;
8713 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8714 goto tls_get_addr_check;
8715 }
8716 else if (retval == 3)
8717 {
8718 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8719 goto tls_get_addr_check;
8720 }
8721 }
8722 }
8723 }
8724 break;
8725
8726 case R_PPC64_GOT_TPREL16_DS:
8727 case R_PPC64_GOT_TPREL16_LO_DS:
8728 if (tls_mask != 0
8729 && (tls_mask & TLS_TPREL) == 0)
8730 {
8731 toctprel:
8732 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
8733 insn &= 31 << 21;
8734 insn |= 0x3c0d0000; /* addis 0,13,0 */
8735 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
8736 r_type = R_PPC64_TPREL16_HA;
8737 if (toc_symndx != 0)
8738 {
8739 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8740 /* We changed the symbol. Start over in order to
8741 get h, sym, sec etc. right. */
8742 rel--;
8743 continue;
8744 }
8745 else
8746 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8747 }
8748 break;
8749
8750 case R_PPC64_TLS:
8751 if (tls_mask != 0
8752 && (tls_mask & TLS_TPREL) == 0)
8753 {
8754 bfd_vma rtra;
8755 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8756 if ((insn & ((0x3f << 26) | (31 << 11)))
8757 == ((31 << 26) | (13 << 11)))
8758 rtra = insn & ((1 << 26) - (1 << 16));
8759 else if ((insn & ((0x3f << 26) | (31 << 16)))
8760 == ((31 << 26) | (13 << 16)))
8761 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
8762 else
8763 abort ();
8764 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
8765 /* add -> addi. */
8766 insn = 14 << 26;
8767 else if ((insn & (31 << 1)) == 23 << 1
8768 && ((insn & (31 << 6)) < 14 << 6
8769 || ((insn & (31 << 6)) >= 16 << 6
8770 && (insn & (31 << 6)) < 24 << 6)))
8771 /* load and store indexed -> dform. */
8772 insn = (32 | ((insn >> 6) & 31)) << 26;
8773 else if ((insn & (31 << 1)) == 21 << 1
8774 && (insn & (0x1a << 6)) == 0)
8775 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
8776 insn = (((58 | ((insn >> 6) & 4)) << 26)
8777 | ((insn >> 6) & 1));
8778 else if ((insn & (31 << 1)) == 21 << 1
8779 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
8780 /* lwax -> lwa. */
8781 insn = (58 << 26) | 2;
8782 else
8783 abort ();
8784 insn |= rtra;
8785 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8786 /* Was PPC64_TLS which sits on insn boundary, now
8787 PPC64_TPREL16_LO which is at insn+2. */
8788 rel->r_offset += 2;
8789 r_type = R_PPC64_TPREL16_LO;
8790 if (toc_symndx != 0)
8791 {
8792 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8793 /* We changed the symbol. Start over in order to
8794 get h, sym, sec etc. right. */
8795 rel--;
8796 continue;
8797 }
8798 else
8799 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8800 }
8801 break;
8802
8803 case R_PPC64_GOT_TLSGD16_HI:
8804 case R_PPC64_GOT_TLSGD16_HA:
8805 tls_gd = TLS_TPRELGD;
8806 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8807 goto tls_gdld_hi;
8808 break;
8809
8810 case R_PPC64_GOT_TLSLD16_HI:
8811 case R_PPC64_GOT_TLSLD16_HA:
8812 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8813 {
8814 tls_gdld_hi:
8815 if ((tls_mask & tls_gd) != 0)
8816 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8817 + R_PPC64_GOT_TPREL16_DS);
8818 else
8819 {
8820 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
8821 rel->r_offset -= 2;
8822 r_type = R_PPC64_NONE;
8823 }
8824 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8825 }
8826 break;
8827
8828 case R_PPC64_GOT_TLSGD16:
8829 case R_PPC64_GOT_TLSGD16_LO:
8830 tls_gd = TLS_TPRELGD;
8831 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8832 goto tls_get_addr_check;
8833 break;
8834
8835 case R_PPC64_GOT_TLSLD16:
8836 case R_PPC64_GOT_TLSLD16_LO:
8837 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8838 {
8839 tls_get_addr_check:
8840 if (rel + 1 < relend)
8841 {
8842 enum elf_ppc64_reloc_type r_type2;
8843 unsigned long r_symndx2;
8844 struct elf_link_hash_entry *h2;
8845 bfd_vma insn1, insn2, insn3;
8846 bfd_vma offset;
8847
8848 /* The next instruction should be a call to
8849 __tls_get_addr. Peek at the reloc to be sure. */
8850 r_type2 = ELF64_R_TYPE (rel[1].r_info);
8851 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
8852 if (r_symndx2 < symtab_hdr->sh_info
8853 || (r_type2 != R_PPC64_REL14
8854 && r_type2 != R_PPC64_REL14_BRTAKEN
8855 && r_type2 != R_PPC64_REL14_BRNTAKEN
8856 && r_type2 != R_PPC64_REL24))
8857 break;
8858
8859 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
8860 while (h2->root.type == bfd_link_hash_indirect
8861 || h2->root.type == bfd_link_hash_warning)
8862 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
8863 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
8864 && h2 != &htab->tls_get_addr_fd->elf))
8865 break;
8866
8867 /* OK, it checks out. Replace the call. */
8868 offset = rel[1].r_offset;
8869 insn1 = bfd_get_32 (output_bfd,
8870 contents + rel->r_offset - 2);
8871 insn3 = bfd_get_32 (output_bfd,
8872 contents + offset + 4);
8873 if ((tls_mask & tls_gd) != 0)
8874 {
8875 /* IE */
8876 insn1 &= (1 << 26) - (1 << 2);
8877 insn1 |= 58 << 26; /* ld */
8878 insn2 = 0x7c636a14; /* add 3,3,13 */
8879 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
8880 if ((tls_mask & TLS_EXPLICIT) == 0)
8881 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8882 + R_PPC64_GOT_TPREL16_DS);
8883 else
8884 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
8885 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8886 }
8887 else
8888 {
8889 /* LE */
8890 insn1 = 0x3c6d0000; /* addis 3,13,0 */
8891 insn2 = 0x38630000; /* addi 3,3,0 */
8892 if (tls_gd == 0)
8893 {
8894 /* Was an LD reloc. */
8895 r_symndx = 0;
8896 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8897 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8898 }
8899 else if (toc_symndx != 0)
8900 r_symndx = toc_symndx;
8901 r_type = R_PPC64_TPREL16_HA;
8902 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8903 rel[1].r_info = ELF64_R_INFO (r_symndx,
8904 R_PPC64_TPREL16_LO);
8905 rel[1].r_offset += 2;
8906 }
8907 if (insn3 == NOP
8908 || insn3 == CROR_151515 || insn3 == CROR_313131)
8909 {
8910 insn3 = insn2;
8911 insn2 = NOP;
8912 rel[1].r_offset += 4;
8913 }
8914 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
8915 bfd_put_32 (output_bfd, insn2, contents + offset);
8916 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
8917 if (tls_gd == 0 || toc_symndx != 0)
8918 {
8919 /* We changed the symbol. Start over in order
8920 to get h, sym, sec etc. right. */
8921 rel--;
8922 continue;
8923 }
8924 }
8925 }
8926 break;
8927
8928 case R_PPC64_DTPMOD64:
8929 if (rel + 1 < relend
8930 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
8931 && rel[1].r_offset == rel->r_offset + 8)
8932 {
8933 if ((tls_mask & TLS_GD) == 0)
8934 {
8935 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
8936 if ((tls_mask & TLS_TPRELGD) != 0)
8937 r_type = R_PPC64_TPREL64;
8938 else
8939 {
8940 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8941 r_type = R_PPC64_NONE;
8942 }
8943 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8944 }
8945 }
8946 else
8947 {
8948 if ((tls_mask & TLS_LD) == 0)
8949 {
8950 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8951 r_type = R_PPC64_NONE;
8952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8953 }
8954 }
8955 break;
8956
8957 case R_PPC64_TPREL64:
8958 if ((tls_mask & TLS_TPREL) == 0)
8959 {
8960 r_type = R_PPC64_NONE;
8961 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8962 }
8963 break;
8964 }
8965
8966 /* Handle other relocations that tweak non-addend part of insn. */
8967 insn = 0;
8968 max_br_offset = 1 << 25;
8969 addend = rel->r_addend;
8970 switch (r_type)
8971 {
8972 default:
8973 break;
8974
8975 /* Branch taken prediction relocations. */
8976 case R_PPC64_ADDR14_BRTAKEN:
8977 case R_PPC64_REL14_BRTAKEN:
8978 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
8979 /* Fall thru. */
8980
8981 /* Branch not taken prediction relocations. */
8982 case R_PPC64_ADDR14_BRNTAKEN:
8983 case R_PPC64_REL14_BRNTAKEN:
8984 insn |= bfd_get_32 (output_bfd,
8985 contents + rel->r_offset) & ~(0x01 << 21);
8986 /* Fall thru. */
8987
8988 case R_PPC64_REL14:
8989 max_br_offset = 1 << 15;
8990 /* Fall thru. */
8991
8992 case R_PPC64_REL24:
8993 /* Calls to functions with a different TOC, such as calls to
8994 shared objects, need to alter the TOC pointer. This is
8995 done using a linkage stub. A REL24 branching to these
8996 linkage stubs needs to be followed by a nop, as the nop
8997 will be replaced with an instruction to restore the TOC
8998 base pointer. */
8999 stub_entry = NULL;
9000 fdh = h;
9001 if (((h != NULL
9002 && (((fdh = h->oh) != NULL
9003 && fdh->elf.plt.plist != NULL)
9004 || (fdh = h)->elf.plt.plist != NULL))
9005 || (sec != NULL
9006 && sec->output_section != NULL
9007 && sec->id <= htab->top_id
9008 && (htab->stub_group[sec->id].toc_off
9009 != htab->stub_group[input_section->id].toc_off)))
9010 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9011 rel, htab)) != NULL
9012 && (stub_entry->stub_type == ppc_stub_plt_call
9013 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9014 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9015 {
9016 bfd_boolean can_plt_call = FALSE;
9017
9018 if (rel->r_offset + 8 <= input_section->size)
9019 {
9020 unsigned long nop;
9021 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9022 if (nop == NOP
9023 || nop == CROR_151515 || nop == CROR_313131)
9024 {
9025 bfd_put_32 (input_bfd, LD_R2_40R1,
9026 contents + rel->r_offset + 4);
9027 can_plt_call = TRUE;
9028 }
9029 }
9030
9031 if (!can_plt_call)
9032 {
9033 if (stub_entry->stub_type == ppc_stub_plt_call)
9034 {
9035 /* If this is a plain branch rather than a branch
9036 and link, don't require a nop. */
9037 unsigned long br;
9038 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9039 if ((br & 1) == 0)
9040 can_plt_call = TRUE;
9041 }
9042 else if (h != NULL
9043 && strcmp (h->elf.root.root.string,
9044 ".__libc_start_main") == 0)
9045 {
9046 /* Allow crt1 branch to go via a toc adjusting stub. */
9047 can_plt_call = TRUE;
9048 }
9049 else
9050 {
9051 if (strcmp (input_section->output_section->name,
9052 ".init") == 0
9053 || strcmp (input_section->output_section->name,
9054 ".fini") == 0)
9055 (*_bfd_error_handler)
9056 (_("%B(%A+0x%lx): automatic multiple TOCs "
9057 "not supported using your crt files; "
9058 "recompile with -mminimal-toc or upgrade gcc"),
9059 input_bfd,
9060 input_section,
9061 (long) rel->r_offset);
9062 else
9063 (*_bfd_error_handler)
9064 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9065 "does not allow automatic multiple TOCs; "
9066 "recompile with -mminimal-toc or "
9067 "-fno-optimize-sibling-calls, "
9068 "or make `%s' extern"),
9069 input_bfd,
9070 input_section,
9071 (long) rel->r_offset,
9072 sym_name,
9073 sym_name);
9074 bfd_set_error (bfd_error_bad_value);
9075 ret = FALSE;
9076 }
9077 }
9078
9079 if (can_plt_call
9080 && stub_entry->stub_type == ppc_stub_plt_call)
9081 unresolved_reloc = FALSE;
9082 }
9083
9084 if (stub_entry == NULL
9085 && get_opd_info (sec) != NULL)
9086 {
9087 /* The branch destination is the value of the opd entry. */
9088 bfd_vma off = (relocation - sec->output_section->vma
9089 - sec->output_offset + rel->r_addend);
9090 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9091 if (dest != (bfd_vma) -1)
9092 {
9093 relocation = dest;
9094 addend = 0;
9095 }
9096 }
9097
9098 /* If the branch is out of reach we ought to have a long
9099 branch stub. */
9100 from = (rel->r_offset
9101 + input_section->output_offset
9102 + input_section->output_section->vma);
9103
9104 if (stub_entry == NULL
9105 && (relocation + rel->r_addend - from + max_br_offset
9106 >= 2 * max_br_offset)
9107 && r_type != R_PPC64_ADDR14_BRTAKEN
9108 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9109 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9110 htab);
9111
9112 if (stub_entry != NULL)
9113 {
9114 /* Munge up the value and addend so that we call the stub
9115 rather than the procedure directly. */
9116 relocation = (stub_entry->stub_offset
9117 + stub_entry->stub_sec->output_offset
9118 + stub_entry->stub_sec->output_section->vma);
9119 addend = 0;
9120 }
9121
9122 if (insn != 0)
9123 {
9124 if (is_power4)
9125 {
9126 /* Set 'a' bit. This is 0b00010 in BO field for branch
9127 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9128 for branch on CTR insns (BO == 1a00t or 1a01t). */
9129 if ((insn & (0x14 << 21)) == (0x04 << 21))
9130 insn |= 0x02 << 21;
9131 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9132 insn |= 0x08 << 21;
9133 else
9134 break;
9135 }
9136 else
9137 {
9138 /* Invert 'y' bit if not the default. */
9139 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9140 insn ^= 0x01 << 21;
9141 }
9142
9143 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9144 }
9145
9146 /* NOP out calls to undefined weak functions.
9147 We can thus call a weak function without first
9148 checking whether the function is defined. */
9149 else if (h != NULL
9150 && h->elf.root.type == bfd_link_hash_undefweak
9151 && r_type == R_PPC64_REL24
9152 && relocation == 0
9153 && rel->r_addend == 0)
9154 {
9155 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9156 continue;
9157 }
9158 break;
9159 }
9160
9161 /* Set `addend'. */
9162 tls_type = 0;
9163 switch (r_type)
9164 {
9165 default:
9166 (*_bfd_error_handler)
9167 (_("%B: unknown relocation type %d for symbol %s"),
9168 input_bfd, (int) r_type, sym_name);
9169
9170 bfd_set_error (bfd_error_bad_value);
9171 ret = FALSE;
9172 continue;
9173
9174 case R_PPC64_NONE:
9175 case R_PPC64_TLS:
9176 case R_PPC64_GNU_VTINHERIT:
9177 case R_PPC64_GNU_VTENTRY:
9178 continue;
9179
9180 /* GOT16 relocations. Like an ADDR16 using the symbol's
9181 address in the GOT as relocation value instead of the
9182 symbol's value itself. Also, create a GOT entry for the
9183 symbol and put the symbol value there. */
9184 case R_PPC64_GOT_TLSGD16:
9185 case R_PPC64_GOT_TLSGD16_LO:
9186 case R_PPC64_GOT_TLSGD16_HI:
9187 case R_PPC64_GOT_TLSGD16_HA:
9188 tls_type = TLS_TLS | TLS_GD;
9189 goto dogot;
9190
9191 case R_PPC64_GOT_TLSLD16:
9192 case R_PPC64_GOT_TLSLD16_LO:
9193 case R_PPC64_GOT_TLSLD16_HI:
9194 case R_PPC64_GOT_TLSLD16_HA:
9195 tls_type = TLS_TLS | TLS_LD;
9196 goto dogot;
9197
9198 case R_PPC64_GOT_TPREL16_DS:
9199 case R_PPC64_GOT_TPREL16_LO_DS:
9200 case R_PPC64_GOT_TPREL16_HI:
9201 case R_PPC64_GOT_TPREL16_HA:
9202 tls_type = TLS_TLS | TLS_TPREL;
9203 goto dogot;
9204
9205 case R_PPC64_GOT_DTPREL16_DS:
9206 case R_PPC64_GOT_DTPREL16_LO_DS:
9207 case R_PPC64_GOT_DTPREL16_HI:
9208 case R_PPC64_GOT_DTPREL16_HA:
9209 tls_type = TLS_TLS | TLS_DTPREL;
9210 goto dogot;
9211
9212 case R_PPC64_GOT16:
9213 case R_PPC64_GOT16_LO:
9214 case R_PPC64_GOT16_HI:
9215 case R_PPC64_GOT16_HA:
9216 case R_PPC64_GOT16_DS:
9217 case R_PPC64_GOT16_LO_DS:
9218 dogot:
9219 {
9220 /* Relocation is to the entry for this symbol in the global
9221 offset table. */
9222 asection *got;
9223 bfd_vma *offp;
9224 bfd_vma off;
9225 unsigned long indx = 0;
9226
9227 if (tls_type == (TLS_TLS | TLS_LD)
9228 && (h == NULL
9229 || (h->elf.elf_link_hash_flags
9230 & ELF_LINK_HASH_DEF_DYNAMIC) == 0))
9231 offp = &ppc64_tlsld_got (input_bfd)->offset;
9232 else
9233 {
9234 struct got_entry *ent;
9235
9236 if (h != NULL)
9237 {
9238 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9239 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
9240 &h->elf)
9241 || (info->shared
9242 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
9243 /* This is actually a static link, or it is a
9244 -Bsymbolic link and the symbol is defined
9245 locally, or the symbol was forced to be local
9246 because of a version file. */
9247 ;
9248 else
9249 {
9250 indx = h->elf.dynindx;
9251 unresolved_reloc = FALSE;
9252 }
9253 ent = h->elf.got.glist;
9254 }
9255 else
9256 {
9257 if (local_got_ents == NULL)
9258 abort ();
9259 ent = local_got_ents[r_symndx];
9260 }
9261
9262 for (; ent != NULL; ent = ent->next)
9263 if (ent->addend == rel->r_addend
9264 && ent->owner == input_bfd
9265 && ent->tls_type == tls_type)
9266 break;
9267 if (ent == NULL)
9268 abort ();
9269 offp = &ent->got.offset;
9270 }
9271
9272 got = ppc64_elf_tdata (input_bfd)->got;
9273 if (got == NULL)
9274 abort ();
9275
9276 /* The offset must always be a multiple of 8. We use the
9277 least significant bit to record whether we have already
9278 processed this entry. */
9279 off = *offp;
9280 if ((off & 1) != 0)
9281 off &= ~1;
9282 else
9283 {
9284 /* Generate relocs for the dynamic linker, except in
9285 the case of TLSLD where we'll use one entry per
9286 module. */
9287 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
9288
9289 *offp = off | 1;
9290 if ((info->shared || indx != 0)
9291 && (h == NULL
9292 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
9293 || h->elf.root.type != bfd_link_hash_undefweak))
9294 {
9295 outrel.r_offset = (got->output_section->vma
9296 + got->output_offset
9297 + off);
9298 outrel.r_addend = rel->r_addend;
9299 if (tls_type & (TLS_LD | TLS_GD))
9300 {
9301 outrel.r_addend = 0;
9302 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
9303 if (tls_type == (TLS_TLS | TLS_GD))
9304 {
9305 loc = relgot->contents;
9306 loc += (relgot->reloc_count++
9307 * sizeof (Elf64_External_Rela));
9308 bfd_elf64_swap_reloca_out (output_bfd,
9309 &outrel, loc);
9310 outrel.r_offset += 8;
9311 outrel.r_addend = rel->r_addend;
9312 outrel.r_info
9313 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9314 }
9315 }
9316 else if (tls_type == (TLS_TLS | TLS_DTPREL))
9317 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9318 else if (tls_type == (TLS_TLS | TLS_TPREL))
9319 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
9320 else if (indx == 0)
9321 {
9322 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
9323
9324 /* Write the .got section contents for the sake
9325 of prelink. */
9326 loc = got->contents + off;
9327 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
9328 loc);
9329 }
9330 else
9331 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
9332
9333 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
9334 {
9335 outrel.r_addend += relocation;
9336 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
9337 outrel.r_addend -= htab->elf.tls_sec->vma;
9338 }
9339 loc = relgot->contents;
9340 loc += (relgot->reloc_count++
9341 * sizeof (Elf64_External_Rela));
9342 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9343 }
9344
9345 /* Init the .got section contents here if we're not
9346 emitting a reloc. */
9347 else
9348 {
9349 relocation += rel->r_addend;
9350 if (tls_type == (TLS_TLS | TLS_LD))
9351 relocation = 1;
9352 else if (tls_type != 0)
9353 {
9354 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
9355 if (tls_type == (TLS_TLS | TLS_TPREL))
9356 relocation += DTP_OFFSET - TP_OFFSET;
9357
9358 if (tls_type == (TLS_TLS | TLS_GD))
9359 {
9360 bfd_put_64 (output_bfd, relocation,
9361 got->contents + off + 8);
9362 relocation = 1;
9363 }
9364 }
9365
9366 bfd_put_64 (output_bfd, relocation,
9367 got->contents + off);
9368 }
9369 }
9370
9371 if (off >= (bfd_vma) -2)
9372 abort ();
9373
9374 relocation = got->output_offset + off;
9375
9376 /* TOC base (r2) is TOC start plus 0x8000. */
9377 addend = -TOC_BASE_OFF;
9378 }
9379 break;
9380
9381 case R_PPC64_PLT16_HA:
9382 case R_PPC64_PLT16_HI:
9383 case R_PPC64_PLT16_LO:
9384 case R_PPC64_PLT32:
9385 case R_PPC64_PLT64:
9386 /* Relocation is to the entry for this symbol in the
9387 procedure linkage table. */
9388
9389 /* Resolve a PLT reloc against a local symbol directly,
9390 without using the procedure linkage table. */
9391 if (h == NULL)
9392 break;
9393
9394 /* It's possible that we didn't make a PLT entry for this
9395 symbol. This happens when statically linking PIC code,
9396 or when using -Bsymbolic. Go find a match if there is a
9397 PLT entry. */
9398 if (htab->plt != NULL)
9399 {
9400 struct plt_entry *ent;
9401 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
9402 if (ent->addend == rel->r_addend
9403 && ent->plt.offset != (bfd_vma) -1)
9404 {
9405 relocation = (htab->plt->output_section->vma
9406 + htab->plt->output_offset
9407 + ent->plt.offset);
9408 unresolved_reloc = FALSE;
9409 }
9410 }
9411 break;
9412
9413 case R_PPC64_TOC:
9414 /* Relocation value is TOC base. */
9415 relocation = TOCstart;
9416 if (r_symndx == 0)
9417 relocation += htab->stub_group[input_section->id].toc_off;
9418 else if (unresolved_reloc)
9419 ;
9420 else if (sec != NULL && sec->id <= htab->top_id)
9421 relocation += htab->stub_group[sec->id].toc_off;
9422 else
9423 unresolved_reloc = TRUE;
9424 goto dodyn2;
9425
9426 /* TOC16 relocs. We want the offset relative to the TOC base,
9427 which is the address of the start of the TOC plus 0x8000.
9428 The TOC consists of sections .got, .toc, .tocbss, and .plt,
9429 in this order. */
9430 case R_PPC64_TOC16:
9431 case R_PPC64_TOC16_LO:
9432 case R_PPC64_TOC16_HI:
9433 case R_PPC64_TOC16_DS:
9434 case R_PPC64_TOC16_LO_DS:
9435 case R_PPC64_TOC16_HA:
9436 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
9437 break;
9438
9439 /* Relocate against the beginning of the section. */
9440 case R_PPC64_SECTOFF:
9441 case R_PPC64_SECTOFF_LO:
9442 case R_PPC64_SECTOFF_HI:
9443 case R_PPC64_SECTOFF_DS:
9444 case R_PPC64_SECTOFF_LO_DS:
9445 case R_PPC64_SECTOFF_HA:
9446 if (sec != NULL)
9447 addend -= sec->output_section->vma;
9448 break;
9449
9450 case R_PPC64_REL14:
9451 case R_PPC64_REL14_BRNTAKEN:
9452 case R_PPC64_REL14_BRTAKEN:
9453 case R_PPC64_REL24:
9454 break;
9455
9456 case R_PPC64_TPREL16:
9457 case R_PPC64_TPREL16_LO:
9458 case R_PPC64_TPREL16_HI:
9459 case R_PPC64_TPREL16_HA:
9460 case R_PPC64_TPREL16_DS:
9461 case R_PPC64_TPREL16_LO_DS:
9462 case R_PPC64_TPREL16_HIGHER:
9463 case R_PPC64_TPREL16_HIGHERA:
9464 case R_PPC64_TPREL16_HIGHEST:
9465 case R_PPC64_TPREL16_HIGHESTA:
9466 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9467 if (info->shared)
9468 /* The TPREL16 relocs shouldn't really be used in shared
9469 libs as they will result in DT_TEXTREL being set, but
9470 support them anyway. */
9471 goto dodyn;
9472 break;
9473
9474 case R_PPC64_DTPREL16:
9475 case R_PPC64_DTPREL16_LO:
9476 case R_PPC64_DTPREL16_HI:
9477 case R_PPC64_DTPREL16_HA:
9478 case R_PPC64_DTPREL16_DS:
9479 case R_PPC64_DTPREL16_LO_DS:
9480 case R_PPC64_DTPREL16_HIGHER:
9481 case R_PPC64_DTPREL16_HIGHERA:
9482 case R_PPC64_DTPREL16_HIGHEST:
9483 case R_PPC64_DTPREL16_HIGHESTA:
9484 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9485 break;
9486
9487 case R_PPC64_DTPMOD64:
9488 relocation = 1;
9489 addend = 0;
9490 goto dodyn;
9491
9492 case R_PPC64_TPREL64:
9493 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9494 goto dodyn;
9495
9496 case R_PPC64_DTPREL64:
9497 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9498 /* Fall thru */
9499
9500 /* Relocations that may need to be propagated if this is a
9501 dynamic object. */
9502 case R_PPC64_REL30:
9503 case R_PPC64_REL32:
9504 case R_PPC64_REL64:
9505 case R_PPC64_ADDR14:
9506 case R_PPC64_ADDR14_BRNTAKEN:
9507 case R_PPC64_ADDR14_BRTAKEN:
9508 case R_PPC64_ADDR16:
9509 case R_PPC64_ADDR16_DS:
9510 case R_PPC64_ADDR16_HA:
9511 case R_PPC64_ADDR16_HI:
9512 case R_PPC64_ADDR16_HIGHER:
9513 case R_PPC64_ADDR16_HIGHERA:
9514 case R_PPC64_ADDR16_HIGHEST:
9515 case R_PPC64_ADDR16_HIGHESTA:
9516 case R_PPC64_ADDR16_LO:
9517 case R_PPC64_ADDR16_LO_DS:
9518 case R_PPC64_ADDR24:
9519 case R_PPC64_ADDR32:
9520 case R_PPC64_ADDR64:
9521 case R_PPC64_UADDR16:
9522 case R_PPC64_UADDR32:
9523 case R_PPC64_UADDR64:
9524 /* r_symndx will be zero only for relocs against symbols
9525 from removed linkonce sections, or sections discarded by
9526 a linker script. */
9527 dodyn:
9528 if (r_symndx == 0)
9529 break;
9530 /* Fall thru. */
9531
9532 dodyn2:
9533 if ((input_section->flags & SEC_ALLOC) == 0)
9534 break;
9535
9536 if (NO_OPD_RELOCS && is_opd)
9537 break;
9538
9539 if ((info->shared
9540 && (h == NULL
9541 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
9542 || h->elf.root.type != bfd_link_hash_undefweak)
9543 && (MUST_BE_DYN_RELOC (r_type)
9544 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
9545 || (ELIMINATE_COPY_RELOCS
9546 && !info->shared
9547 && h != NULL
9548 && h->elf.dynindx != -1
9549 && !(h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF)
9550 && (h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
9551 && !(h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
9552 {
9553 Elf_Internal_Rela outrel;
9554 bfd_boolean skip, relocate;
9555 asection *sreloc;
9556 bfd_byte *loc;
9557 bfd_vma out_off;
9558
9559 /* When generating a dynamic object, these relocations
9560 are copied into the output file to be resolved at run
9561 time. */
9562
9563 skip = FALSE;
9564 relocate = FALSE;
9565
9566 out_off = _bfd_elf_section_offset (output_bfd, info,
9567 input_section, rel->r_offset);
9568 if (out_off == (bfd_vma) -1)
9569 skip = TRUE;
9570 else if (out_off == (bfd_vma) -2)
9571 skip = TRUE, relocate = TRUE;
9572 out_off += (input_section->output_section->vma
9573 + input_section->output_offset);
9574 outrel.r_offset = out_off;
9575 outrel.r_addend = rel->r_addend;
9576
9577 /* Optimize unaligned reloc use. */
9578 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
9579 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
9580 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
9581 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
9582 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
9583 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
9584 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
9585 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
9586 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
9587
9588 if (skip)
9589 memset (&outrel, 0, sizeof outrel);
9590 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
9591 && !is_opd
9592 && r_type != R_PPC64_TOC)
9593 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
9594 else
9595 {
9596 /* This symbol is local, or marked to become local,
9597 or this is an opd section reloc which must point
9598 at a local function. */
9599 outrel.r_addend += relocation;
9600 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
9601 {
9602 if (is_opd && h != NULL)
9603 {
9604 /* Lie about opd entries. This case occurs
9605 when building shared libraries and we
9606 reference a function in another shared
9607 lib. The same thing happens for a weak
9608 definition in an application that's
9609 overridden by a strong definition in a
9610 shared lib. (I believe this is a generic
9611 bug in binutils handling of weak syms.)
9612 In these cases we won't use the opd
9613 entry in this lib. */
9614 unresolved_reloc = FALSE;
9615 }
9616 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9617
9618 /* We need to relocate .opd contents for ld.so.
9619 Prelink also wants simple and consistent rules
9620 for relocs. This make all RELATIVE relocs have
9621 *r_offset equal to r_addend. */
9622 relocate = TRUE;
9623 }
9624 else
9625 {
9626 long indx = 0;
9627
9628 if (bfd_is_abs_section (sec))
9629 ;
9630 else if (sec == NULL || sec->owner == NULL)
9631 {
9632 bfd_set_error (bfd_error_bad_value);
9633 return FALSE;
9634 }
9635 else
9636 {
9637 asection *osec;
9638
9639 osec = sec->output_section;
9640 indx = elf_section_data (osec)->dynindx;
9641
9642 /* We are turning this relocation into one
9643 against a section symbol, so subtract out
9644 the output section's address but not the
9645 offset of the input section in the output
9646 section. */
9647 outrel.r_addend -= osec->vma;
9648 }
9649
9650 outrel.r_info = ELF64_R_INFO (indx, r_type);
9651 }
9652 }
9653
9654 sreloc = elf_section_data (input_section)->sreloc;
9655 if (sreloc == NULL)
9656 abort ();
9657
9658 loc = sreloc->contents;
9659 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
9660 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9661
9662 /* If this reloc is against an external symbol, it will
9663 be computed at runtime, so there's no need to do
9664 anything now. However, for the sake of prelink ensure
9665 that the section contents are a known value. */
9666 if (! relocate)
9667 {
9668 unresolved_reloc = FALSE;
9669 /* The value chosen here is quite arbitrary as ld.so
9670 ignores section contents except for the special
9671 case of .opd where the contents might be accessed
9672 before relocation. Choose zero, as that won't
9673 cause reloc overflow. */
9674 relocation = 0;
9675 addend = 0;
9676 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
9677 to improve backward compatibility with older
9678 versions of ld. */
9679 if (r_type == R_PPC64_ADDR64)
9680 addend = outrel.r_addend;
9681 /* Adjust pc_relative relocs to have zero in *r_offset. */
9682 else if (ppc64_elf_howto_table[r_type]->pc_relative)
9683 addend = (input_section->output_section->vma
9684 + input_section->output_offset
9685 + rel->r_offset);
9686 }
9687 }
9688 break;
9689
9690 case R_PPC64_COPY:
9691 case R_PPC64_GLOB_DAT:
9692 case R_PPC64_JMP_SLOT:
9693 case R_PPC64_RELATIVE:
9694 /* We shouldn't ever see these dynamic relocs in relocatable
9695 files. */
9696 /* Fall through. */
9697
9698 case R_PPC64_PLTGOT16:
9699 case R_PPC64_PLTGOT16_DS:
9700 case R_PPC64_PLTGOT16_HA:
9701 case R_PPC64_PLTGOT16_HI:
9702 case R_PPC64_PLTGOT16_LO:
9703 case R_PPC64_PLTGOT16_LO_DS:
9704 case R_PPC64_PLTREL32:
9705 case R_PPC64_PLTREL64:
9706 /* These ones haven't been implemented yet. */
9707
9708 (*_bfd_error_handler)
9709 (_("%B: relocation %s is not supported for symbol %s."),
9710 input_bfd,
9711 ppc64_elf_howto_table[r_type]->name, sym_name);
9712
9713 bfd_set_error (bfd_error_invalid_operation);
9714 ret = FALSE;
9715 continue;
9716 }
9717
9718 /* Do any further special processing. */
9719 switch (r_type)
9720 {
9721 default:
9722 break;
9723
9724 case R_PPC64_ADDR16_HA:
9725 case R_PPC64_ADDR16_HIGHERA:
9726 case R_PPC64_ADDR16_HIGHESTA:
9727 case R_PPC64_GOT16_HA:
9728 case R_PPC64_PLTGOT16_HA:
9729 case R_PPC64_PLT16_HA:
9730 case R_PPC64_TOC16_HA:
9731 case R_PPC64_SECTOFF_HA:
9732 case R_PPC64_TPREL16_HA:
9733 case R_PPC64_DTPREL16_HA:
9734 case R_PPC64_GOT_TLSGD16_HA:
9735 case R_PPC64_GOT_TLSLD16_HA:
9736 case R_PPC64_GOT_TPREL16_HA:
9737 case R_PPC64_GOT_DTPREL16_HA:
9738 case R_PPC64_TPREL16_HIGHER:
9739 case R_PPC64_TPREL16_HIGHERA:
9740 case R_PPC64_TPREL16_HIGHEST:
9741 case R_PPC64_TPREL16_HIGHESTA:
9742 case R_PPC64_DTPREL16_HIGHER:
9743 case R_PPC64_DTPREL16_HIGHERA:
9744 case R_PPC64_DTPREL16_HIGHEST:
9745 case R_PPC64_DTPREL16_HIGHESTA:
9746 /* It's just possible that this symbol is a weak symbol
9747 that's not actually defined anywhere. In that case,
9748 'sec' would be NULL, and we should leave the symbol
9749 alone (it will be set to zero elsewhere in the link). */
9750 if (sec != NULL)
9751 /* Add 0x10000 if sign bit in 0:15 is set.
9752 Bits 0:15 are not used. */
9753 addend += 0x8000;
9754 break;
9755
9756 case R_PPC64_ADDR16_DS:
9757 case R_PPC64_ADDR16_LO_DS:
9758 case R_PPC64_GOT16_DS:
9759 case R_PPC64_GOT16_LO_DS:
9760 case R_PPC64_PLT16_LO_DS:
9761 case R_PPC64_SECTOFF_DS:
9762 case R_PPC64_SECTOFF_LO_DS:
9763 case R_PPC64_TOC16_DS:
9764 case R_PPC64_TOC16_LO_DS:
9765 case R_PPC64_PLTGOT16_DS:
9766 case R_PPC64_PLTGOT16_LO_DS:
9767 case R_PPC64_GOT_TPREL16_DS:
9768 case R_PPC64_GOT_TPREL16_LO_DS:
9769 case R_PPC64_GOT_DTPREL16_DS:
9770 case R_PPC64_GOT_DTPREL16_LO_DS:
9771 case R_PPC64_TPREL16_DS:
9772 case R_PPC64_TPREL16_LO_DS:
9773 case R_PPC64_DTPREL16_DS:
9774 case R_PPC64_DTPREL16_LO_DS:
9775 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9776 mask = 3;
9777 /* If this reloc is against an lq insn, then the value must be
9778 a multiple of 16. This is somewhat of a hack, but the
9779 "correct" way to do this by defining _DQ forms of all the
9780 _DS relocs bloats all reloc switches in this file. It
9781 doesn't seem to make much sense to use any of these relocs
9782 in data, so testing the insn should be safe. */
9783 if ((insn & (0x3f << 26)) == (56u << 26))
9784 mask = 15;
9785 if (((relocation + addend) & mask) != 0)
9786 {
9787 (*_bfd_error_handler)
9788 (_("%B: error: relocation %s not a multiple of %d"),
9789 input_bfd,
9790 ppc64_elf_howto_table[r_type]->name,
9791 mask + 1);
9792 bfd_set_error (bfd_error_bad_value);
9793 ret = FALSE;
9794 continue;
9795 }
9796 break;
9797 }
9798
9799 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9800 because such sections are not SEC_ALLOC and thus ld.so will
9801 not process them. */
9802 if (unresolved_reloc
9803 && !((input_section->flags & SEC_DEBUGGING) != 0
9804 && (h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
9805 {
9806 (*_bfd_error_handler)
9807 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9808 input_bfd,
9809 input_section,
9810 (long) rel->r_offset,
9811 ppc64_elf_howto_table[(int) r_type]->name,
9812 h->elf.root.root.string);
9813 ret = FALSE;
9814 }
9815
9816 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
9817 input_bfd,
9818 input_section,
9819 contents,
9820 rel->r_offset,
9821 relocation,
9822 addend);
9823
9824 if (r != bfd_reloc_ok)
9825 {
9826 if (sym_name == NULL)
9827 sym_name = "(null)";
9828 if (r == bfd_reloc_overflow)
9829 {
9830 if (warned)
9831 continue;
9832 if (h != NULL
9833 && h->elf.root.type == bfd_link_hash_undefweak
9834 && ppc64_elf_howto_table[r_type]->pc_relative)
9835 {
9836 /* Assume this is a call protected by other code that
9837 detects the symbol is undefined. If this is the case,
9838 we can safely ignore the overflow. If not, the
9839 program is hosed anyway, and a little warning isn't
9840 going to help. */
9841
9842 continue;
9843 }
9844
9845 if (!((*info->callbacks->reloc_overflow)
9846 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
9847 rel->r_addend, input_bfd, input_section, rel->r_offset)))
9848 return FALSE;
9849 }
9850 else
9851 {
9852 (*_bfd_error_handler)
9853 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
9854 input_bfd,
9855 input_section,
9856 (long) rel->r_offset,
9857 ppc64_elf_howto_table[r_type]->name,
9858 sym_name,
9859 (int) r);
9860 ret = FALSE;
9861 }
9862 }
9863 }
9864
9865 return ret;
9866 }
9867
9868 /* Adjust the value of any local symbols in opd sections. */
9869
9870 static bfd_boolean
9871 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
9872 const char *name ATTRIBUTE_UNUSED,
9873 Elf_Internal_Sym *elfsym,
9874 asection *input_sec,
9875 struct elf_link_hash_entry *h)
9876 {
9877 long *opd_adjust, adjust;
9878 bfd_vma value;
9879
9880 if (h != NULL)
9881 return TRUE;
9882
9883 opd_adjust = get_opd_info (input_sec);
9884 if (opd_adjust == NULL)
9885 return TRUE;
9886
9887 value = elfsym->st_value - input_sec->output_offset;
9888 if (!info->relocatable)
9889 value -= input_sec->output_section->vma;
9890
9891 adjust = opd_adjust[value / 8];
9892 if (adjust == -1)
9893 elfsym->st_value = 0;
9894 else
9895 elfsym->st_value += adjust;
9896 return TRUE;
9897 }
9898
9899 /* Finish up dynamic symbol handling. We set the contents of various
9900 dynamic sections here. */
9901
9902 static bfd_boolean
9903 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
9904 struct bfd_link_info *info,
9905 struct elf_link_hash_entry *h,
9906 Elf_Internal_Sym *sym)
9907 {
9908 struct ppc_link_hash_table *htab;
9909 bfd *dynobj;
9910 struct plt_entry *ent;
9911 Elf_Internal_Rela rela;
9912 bfd_byte *loc;
9913
9914 htab = ppc_hash_table (info);
9915 dynobj = htab->elf.dynobj;
9916
9917 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9918 if (ent->plt.offset != (bfd_vma) -1)
9919 {
9920 /* This symbol has an entry in the procedure linkage
9921 table. Set it up. */
9922
9923 if (htab->plt == NULL
9924 || htab->relplt == NULL
9925 || htab->glink == NULL)
9926 abort ();
9927
9928 /* Create a JMP_SLOT reloc to inform the dynamic linker to
9929 fill in the PLT entry. */
9930 rela.r_offset = (htab->plt->output_section->vma
9931 + htab->plt->output_offset
9932 + ent->plt.offset);
9933 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
9934 rela.r_addend = ent->addend;
9935
9936 loc = htab->relplt->contents;
9937 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
9938 * sizeof (Elf64_External_Rela));
9939 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9940 }
9941
9942 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
9943 {
9944 Elf_Internal_Rela rela;
9945 bfd_byte *loc;
9946
9947 /* This symbol needs a copy reloc. Set it up. */
9948
9949 if (h->dynindx == -1
9950 || (h->root.type != bfd_link_hash_defined
9951 && h->root.type != bfd_link_hash_defweak)
9952 || htab->relbss == NULL)
9953 abort ();
9954
9955 rela.r_offset = (h->root.u.def.value
9956 + h->root.u.def.section->output_section->vma
9957 + h->root.u.def.section->output_offset);
9958 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
9959 rela.r_addend = 0;
9960 loc = htab->relbss->contents;
9961 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
9962 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9963 }
9964
9965 /* Mark some specially defined symbols as absolute. */
9966 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
9967 sym->st_shndx = SHN_ABS;
9968
9969 return TRUE;
9970 }
9971
9972 /* Used to decide how to sort relocs in an optimal manner for the
9973 dynamic linker, before writing them out. */
9974
9975 static enum elf_reloc_type_class
9976 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
9977 {
9978 enum elf_ppc64_reloc_type r_type;
9979
9980 r_type = ELF64_R_TYPE (rela->r_info);
9981 switch (r_type)
9982 {
9983 case R_PPC64_RELATIVE:
9984 return reloc_class_relative;
9985 case R_PPC64_JMP_SLOT:
9986 return reloc_class_plt;
9987 case R_PPC64_COPY:
9988 return reloc_class_copy;
9989 default:
9990 return reloc_class_normal;
9991 }
9992 }
9993
9994 /* Finish up the dynamic sections. */
9995
9996 static bfd_boolean
9997 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
9998 struct bfd_link_info *info)
9999 {
10000 struct ppc_link_hash_table *htab;
10001 bfd *dynobj;
10002 asection *sdyn;
10003
10004 htab = ppc_hash_table (info);
10005 dynobj = htab->elf.dynobj;
10006 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10007
10008 if (htab->elf.dynamic_sections_created)
10009 {
10010 Elf64_External_Dyn *dyncon, *dynconend;
10011
10012 if (sdyn == NULL || htab->got == NULL)
10013 abort ();
10014
10015 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10016 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10017 for (; dyncon < dynconend; dyncon++)
10018 {
10019 Elf_Internal_Dyn dyn;
10020 asection *s;
10021
10022 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10023
10024 switch (dyn.d_tag)
10025 {
10026 default:
10027 continue;
10028
10029 case DT_PPC64_GLINK:
10030 s = htab->glink;
10031 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10032 /* We stupidly defined DT_PPC64_GLINK to be the start
10033 of glink rather than the first entry point, which is
10034 what ld.so needs, and now have a bigger stub to
10035 support automatic multiple TOCs. */
10036 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10037 break;
10038
10039 case DT_PPC64_OPD:
10040 s = bfd_get_section_by_name (output_bfd, ".opd");
10041 if (s == NULL)
10042 continue;
10043 dyn.d_un.d_ptr = s->vma;
10044 break;
10045
10046 case DT_PPC64_OPDSZ:
10047 s = bfd_get_section_by_name (output_bfd, ".opd");
10048 if (s == NULL)
10049 continue;
10050 dyn.d_un.d_val = s->size;
10051 break;
10052
10053 case DT_PLTGOT:
10054 s = htab->plt;
10055 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10056 break;
10057
10058 case DT_JMPREL:
10059 s = htab->relplt;
10060 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10061 break;
10062
10063 case DT_PLTRELSZ:
10064 dyn.d_un.d_val = htab->relplt->size;
10065 break;
10066
10067 case DT_RELASZ:
10068 /* Don't count procedure linkage table relocs in the
10069 overall reloc count. */
10070 s = htab->relplt;
10071 if (s == NULL)
10072 continue;
10073 dyn.d_un.d_val -= s->size;
10074 break;
10075
10076 case DT_RELA:
10077 /* We may not be using the standard ELF linker script.
10078 If .rela.plt is the first .rela section, we adjust
10079 DT_RELA to not include it. */
10080 s = htab->relplt;
10081 if (s == NULL)
10082 continue;
10083 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10084 continue;
10085 dyn.d_un.d_ptr += s->size;
10086 break;
10087 }
10088
10089 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10090 }
10091 }
10092
10093 if (htab->got != NULL && htab->got->size != 0)
10094 {
10095 /* Fill in the first entry in the global offset table.
10096 We use it to hold the link-time TOCbase. */
10097 bfd_put_64 (output_bfd,
10098 elf_gp (output_bfd) + TOC_BASE_OFF,
10099 htab->got->contents);
10100
10101 /* Set .got entry size. */
10102 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10103 }
10104
10105 if (htab->plt != NULL && htab->plt->size != 0)
10106 {
10107 /* Set .plt entry size. */
10108 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10109 = PLT_ENTRY_SIZE;
10110 }
10111
10112 /* We need to handle writing out multiple GOT sections ourselves,
10113 since we didn't add them to DYNOBJ. We know dynobj is the first
10114 bfd. */
10115 while ((dynobj = dynobj->link_next) != NULL)
10116 {
10117 asection *s;
10118
10119 if (!is_ppc64_target (dynobj->xvec))
10120 continue;
10121
10122 s = ppc64_elf_tdata (dynobj)->got;
10123 if (s != NULL
10124 && s->size != 0
10125 && s->output_section != bfd_abs_section_ptr
10126 && !bfd_set_section_contents (output_bfd, s->output_section,
10127 s->contents, s->output_offset,
10128 s->size))
10129 return FALSE;
10130 s = ppc64_elf_tdata (dynobj)->relgot;
10131 if (s != NULL
10132 && s->size != 0
10133 && s->output_section != bfd_abs_section_ptr
10134 && !bfd_set_section_contents (output_bfd, s->output_section,
10135 s->contents, s->output_offset,
10136 s->size))
10137 return FALSE;
10138 }
10139
10140 return TRUE;
10141 }
10142
10143 #include "elf64-target.h"
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