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* elf64-ppc.c (ppc64_elf_edit_opd): Don't call dec_dynrel_count
[binutils.git] / bfd / elf64-ppc.c
blob31ad3d0e305c09ee28de6258123c9cbeee0ef788
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_header_size 8
71 #define elf_backend_can_gc_sections 1
72 #define elf_backend_can_refcount 1
73 #define elf_backend_rela_normal 1
74
75 #define bfd_elf64_mkobject ppc64_elf_mkobject
76 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
77 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
78 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
79 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
80 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
81 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
82
83 #define elf_backend_object_p ppc64_elf_object_p
84 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
85 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
86 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
87 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
88 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
89 #define elf_backend_check_directives ppc64_elf_check_directives
90 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
91 #define elf_backend_check_relocs ppc64_elf_check_relocs
92 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
93 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
94 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
95 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
96 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
97 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
98 #define elf_backend_relocate_section ppc64_elf_relocate_section
99 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
100 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
101 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
102 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
103 #define elf_backend_special_sections ppc64_elf_special_sections
104
105 /* The name of the dynamic interpreter. This is put in the .interp
106 section. */
107 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
108
109 /* The size in bytes of an entry in the procedure linkage table. */
110 #define PLT_ENTRY_SIZE 24
111
112 /* The initial size of the plt reserved for the dynamic linker. */
113 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
114
115 /* TOC base pointers offset from start of TOC. */
116 #define TOC_BASE_OFF 0x8000
117
118 /* Offset of tp and dtp pointers from start of TLS block. */
119 #define TP_OFFSET 0x7000
120 #define DTP_OFFSET 0x8000
121
122 /* .plt call stub instructions. The normal stub is like this, but
123 sometimes the .plt entry crosses a 64k boundary and we need to
124 insert an addis to adjust r12. */
125 #define PLT_CALL_STUB_SIZE (7*4)
126 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
127 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
128 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
129 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
130 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
131 /* ld %r11,xxx+16@l(%r12) */
132 #define BCTR 0x4e800420 /* bctr */
133
134
135 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
136 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
137
138 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
139
140 /* glink call stub instructions. We enter with the index in R0, and the
141 address of glink entry in CTR. From that, we can calculate PLT0. */
142 #define GLINK_CALL_STUB_SIZE (16*4)
143 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
144 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
145 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
146 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
147 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
148 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
149 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
150 /* sub %r12,%r12,%r11 */
151 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
152 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
153 /* ld %r11,xxx@l(%r12) */
154 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
155 /* ld %r2,8(%r12) */
156 /* mtctr %r11 */
157 /* ld %r11,16(%r12) */
158 /* bctr */
159
160 /* Pad with this. */
161 #define NOP 0x60000000
162
163 /* Some other nops. */
164 #define CROR_151515 0x4def7b82
165 #define CROR_313131 0x4ffffb82
166
167 /* .glink entries for the first 32k functions are two instructions. */
168 #define LI_R0_0 0x38000000 /* li %r0,0 */
169 #define B_DOT 0x48000000 /* b . */
170
171 /* After that, we need two instructions to load the index, followed by
172 a branch. */
173 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
174 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
175
176 /* Instructions used by the save and restore reg functions. */
177 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
178 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
179 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
180 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
181 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
182 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
183 #define LI_R12_0 0x39800000 /* li %r12,0 */
184 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
185 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
186 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
187 #define BLR 0x4e800020 /* blr */
188
189 /* Since .opd is an array of descriptors and each entry will end up
190 with identical R_PPC64_RELATIVE relocs, there is really no need to
191 propagate .opd relocs; The dynamic linker should be taught to
192 relocate .opd without reloc entries. */
193 #ifndef NO_OPD_RELOCS
194 #define NO_OPD_RELOCS 0
195 #endif
196 \f
197 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
198
199 /* Relocation HOWTO's. */
200 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
201
202 static reloc_howto_type ppc64_elf_howto_raw[] = {
203 /* This reloc does nothing. */
204 HOWTO (R_PPC64_NONE, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 32, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_dont, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_PPC64_NONE", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 0, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* A standard 32 bit relocation. */
219 HOWTO (R_PPC64_ADDR32, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_bitfield, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_ADDR32", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* An absolute 26 bit branch; the lower two bits must be zero.
234 FIXME: we don't check that, we just clear them. */
235 HOWTO (R_PPC64_ADDR24, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 26, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR24", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0x03fffffc, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* A standard 16 bit relocation. */
250 HOWTO (R_PPC64_ADDR16, /* type */
251 0, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 16, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR16", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0xffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A 16 bit relocation without overflow. */
265 HOWTO (R_PPC64_ADDR16_LO, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont,/* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16_LO", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* Bits 16-31 of an address. */
280 HOWTO (R_PPC64_ADDR16_HI, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_HI", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
295 bits, treated as a signed number, is negative. */
296 HOWTO (R_PPC64_ADDR16_HA, /* type */
297 16, /* rightshift */
298 1, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 ppc64_elf_ha_reloc, /* special_function */
304 "R_PPC64_ADDR16_HA", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch; the lower two bits must be zero.
311 FIXME: we don't check that, we just clear them. */
312 HOWTO (R_PPC64_ADDR14, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_bitfield, /* complain_on_overflow */
319 ppc64_elf_branch_reloc, /* special_function */
320 "R_PPC64_ADDR14", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0x0000fffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is expected to be taken. The lower two
328 bits must be zero. */
329 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_brtaken_reloc, /* special_function */
337 "R_PPC64_ADDR14_BRTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* An absolute 16 bit branch, for which bit 10 should be set to
344 indicate that the branch is not expected to be taken. The lower
345 two bits must be zero. */
346 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc64_elf_brtaken_reloc, /* special_function */
354 "R_PPC64_ADDR14_BRNTAKEN",/* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x0000fffc, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 /* A relative 26 bit branch; the lower two bits must be zero. */
361 HOWTO (R_PPC64_REL24, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 26, /* bitsize */
365 TRUE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_branch_reloc, /* special_function */
369 "R_PPC64_REL24", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x03fffffc, /* dst_mask */
373 TRUE), /* pcrel_offset */
374
375 /* A relative 16 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL14, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL14", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x0000fffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is expected to be taken. The lower two bits must be
392 zero. */
393 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_brtaken_reloc, /* special_function */
401 "R_PPC64_REL14_BRTAKEN", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* A relative 16 bit branch. Bit 10 should be set to indicate that
408 the branch is not expected to be taken. The lower two bits must
409 be zero. */
410 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
411 0, /* rightshift */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 TRUE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc64_elf_brtaken_reloc, /* special_function */
418 "R_PPC64_REL14_BRNTAKEN",/* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0x0000fffc, /* dst_mask */
422 TRUE), /* pcrel_offset */
423
424 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
425 symbol. */
426 HOWTO (R_PPC64_GOT16, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_unhandled_reloc, /* special_function */
434 "R_PPC64_GOT16", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC64_GOT16_LO, /* type */
443 0, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16_LO", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_HI, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont,/* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_HI", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
473 the symbol. */
474 HOWTO (R_PPC64_GOT16_HA, /* type */
475 16, /* rightshift */
476 1, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_dont,/* complain_on_overflow */
481 ppc64_elf_unhandled_reloc, /* special_function */
482 "R_PPC64_GOT16_HA", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC64_COPY, /* type */
494 0, /* rightshift */
495 0, /* this one is variable size */
496 0, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc64_elf_unhandled_reloc, /* special_function */
501 "R_PPC64_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC64_ADDR64, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC64_GLOB_DAT, /* type */
510 0, /* rightshift */
511 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
512 64, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 ONES (64), /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Created by the link editor. Marks a procedure linkage table
524 entry for a symbol. */
525 HOWTO (R_PPC64_JMP_SLOT, /* type */
526 0, /* rightshift */
527 0, /* size (0 = byte, 1 = short, 2 = long) */
528 0, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 ppc64_elf_unhandled_reloc, /* special_function */
533 "R_PPC64_JMP_SLOT", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Used only by the dynamic linker. When the object is run, this
540 doubleword64 is set to the load address of the object, plus the
541 addend. */
542 HOWTO (R_PPC64_RELATIVE, /* type */
543 0, /* rightshift */
544 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
545 64, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 bfd_elf_generic_reloc, /* special_function */
550 "R_PPC64_RELATIVE", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 ONES (64), /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Like R_PPC64_ADDR32, but may be unaligned. */
557 HOWTO (R_PPC64_UADDR32, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 32, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_bitfield, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_UADDR32", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xffffffff, /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR16, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR16, /* type */
573 0, /* rightshift */
574 1, /* size (0 = byte, 1 = short, 2 = long) */
575 16, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR16", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* 32-bit PC relative. */
587 HOWTO (R_PPC64_REL32, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 32, /* bitsize */
591 TRUE, /* pc_relative */
592 0, /* bitpos */
593 /* FIXME: Verify. Was complain_overflow_bitfield. */
594 complain_overflow_signed, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC64_REL32", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffffffff, /* dst_mask */
600 TRUE), /* pcrel_offset */
601
602 /* 32-bit relocation to the symbol's procedure linkage table. */
603 HOWTO (R_PPC64_PLT32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_bitfield, /* complain_on_overflow */
610 ppc64_elf_unhandled_reloc, /* special_function */
611 "R_PPC64_PLT32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 FALSE), /* pcrel_offset */
616
617 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
618 FIXME: R_PPC64_PLTREL32 not supported. */
619 HOWTO (R_PPC64_PLTREL32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 TRUE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_signed, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC64_PLTREL32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffffffff, /* dst_mask */
631 TRUE), /* pcrel_offset */
632
633 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
634 the symbol. */
635 HOWTO (R_PPC64_PLT16_LO, /* type */
636 0, /* rightshift */
637 1, /* size (0 = byte, 1 = short, 2 = long) */
638 16, /* bitsize */
639 FALSE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc64_elf_unhandled_reloc, /* special_function */
643 "R_PPC64_PLT16_LO", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffff, /* dst_mask */
647 FALSE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_HI, /* type */
652 16, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_HI", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC64_PLT16_HA, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT16_HA", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 16-bit section relative relocation. */
682 HOWTO (R_PPC64_SECTOFF, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_bitfield, /* complain_on_overflow */
689 ppc64_elf_sectoff_reloc, /* special_function */
690 "R_PPC64_SECTOFF", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* Like R_PPC64_SECTOFF, but no overflow warning. */
697 HOWTO (R_PPC64_SECTOFF_LO, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_dont, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF_LO", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit upper half section relative relocation. */
712 HOWTO (R_PPC64_SECTOFF_HI, /* type */
713 16, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_HI", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half adjusted section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HA, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_ha_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HA", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* Like R_PPC64_REL24 without touching the two least significant bits. */
742 HOWTO (R_PPC64_REL30, /* type */
743 2, /* rightshift */
744 2, /* size (0 = byte, 1 = short, 2 = long) */
745 30, /* bitsize */
746 TRUE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 bfd_elf_generic_reloc, /* special_function */
750 "R_PPC64_REL30", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xfffffffc, /* dst_mask */
754 TRUE), /* pcrel_offset */
755
756 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
757
758 /* A standard 64-bit relocation. */
759 HOWTO (R_PPC64_ADDR64, /* type */
760 0, /* rightshift */
761 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
762 64, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_ADDR64", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 ONES (64), /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* The bits 32-47 of an address. */
774 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
775 32, /* rightshift */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR16_HIGHER", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address, plus 1 if the contents of the low
789 16 bits, treated as a signed number, is negative. */
790 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
791 32, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 ppc64_elf_ha_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHERA", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 48-63 of an address. */
805 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
806 48, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHEST", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address, plus 1 if the contents of the low
820 16 bits, treated as a signed number, is negative. */
821 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
822 48, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 ppc64_elf_ha_reloc, /* special_function */
829 "R_PPC64_ADDR16_HIGHESTA", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Like ADDR64, but may be unaligned. */
836 HOWTO (R_PPC64_UADDR64, /* type */
837 0, /* rightshift */
838 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
839 64, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC64_UADDR64", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 ONES (64), /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* 64-bit relative relocation. */
851 HOWTO (R_PPC64_REL64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 TRUE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_REL64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 TRUE), /* pcrel_offset */
864
865 /* 64-bit relocation to the symbol's procedure linkage table. */
866 HOWTO (R_PPC64_PLT64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc64_elf_unhandled_reloc, /* special_function */
874 "R_PPC64_PLT64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 /* 64-bit PC relative relocation to the symbol's procedure linkage
881 table. */
882 /* FIXME: R_PPC64_PLTREL64 not supported. */
883 HOWTO (R_PPC64_PLTREL64, /* type */
884 0, /* rightshift */
885 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
886 64, /* bitsize */
887 TRUE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_unhandled_reloc, /* special_function */
891 "R_PPC64_PLTREL64", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 ONES (64), /* dst_mask */
895 TRUE), /* pcrel_offset */
896
897 /* 16 bit TOC-relative relocation. */
898
899 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
900 HOWTO (R_PPC64_TOC16, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_signed, /* complain_on_overflow */
907 ppc64_elf_toc_reloc, /* special_function */
908 "R_PPC64_TOC16", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation without overflow. */
915
916 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
917 HOWTO (R_PPC64_TOC16_LO, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16_LO", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation, high 16 bits. */
932
933 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
934 HOWTO (R_PPC64_TOC16_HI, /* type */
935 16, /* rightshift */
936 1, /* size (0 = byte, 1 = short, 2 = long) */
937 16, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_toc_reloc, /* special_function */
942 "R_PPC64_TOC16_HI", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 0xffff, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
949 contents of the low 16 bits, treated as a signed number, is
950 negative. */
951
952 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
953 HOWTO (R_PPC64_TOC16_HA, /* type */
954 16, /* rightshift */
955 1, /* size (0 = byte, 1 = short, 2 = long) */
956 16, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_dont, /* complain_on_overflow */
960 ppc64_elf_toc_ha_reloc, /* special_function */
961 "R_PPC64_TOC16_HA", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 0xffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* 64-bit relocation; insert value of TOC base (.TOC.). */
968
969 /* R_PPC64_TOC 51 doubleword64 .TOC. */
970 HOWTO (R_PPC64_TOC, /* type */
971 0, /* rightshift */
972 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
973 64, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_bitfield, /* complain_on_overflow */
977 ppc64_elf_toc64_reloc, /* special_function */
978 "R_PPC64_TOC", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 ONES (64), /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Like R_PPC64_GOT16, but also informs the link editor that the
985 value to relocate may (!) refer to a PLT entry which the link
986 editor (a) may replace with the symbol value. If the link editor
987 is unable to fully resolve the symbol, it may (b) create a PLT
988 entry and store the address to the new PLT entry in the GOT.
989 This permits lazy resolution of function symbols at run time.
990 The link editor may also skip all of this and just (c) emit a
991 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
992 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
993 HOWTO (R_PPC64_PLTGOT16, /* type */
994 0, /* rightshift */
995 1, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 FALSE, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_signed, /* complain_on_overflow */
1000 ppc64_elf_unhandled_reloc, /* special_function */
1001 "R_PPC64_PLTGOT16", /* name */
1002 FALSE, /* partial_inplace */
1003 0, /* src_mask */
1004 0xffff, /* dst_mask */
1005 FALSE), /* pcrel_offset */
1006
1007 /* Like R_PPC64_PLTGOT16, but without overflow. */
1008 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1010 0, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16_LO", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1024 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_HI", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1040 1 if the contents of the low 16 bits, treated as a signed number,
1041 is negative. */
1042 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont,/* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HA", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1058 HOWTO (R_PPC64_ADDR16_DS, /* type */
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_bitfield, /* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_PPC64_ADDR16_DS", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xfffc, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont,/* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_LO_DS",/* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_GOT16_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_signed, /* complain_on_overflow */
1095 ppc64_elf_unhandled_reloc, /* special_function */
1096 "R_PPC64_GOT16_DS", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_LO_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_PLT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_bitfield, /* complain_on_overflow */
1140 ppc64_elf_sectoff_reloc, /* special_function */
1141 "R_PPC64_SECTOFF_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_dont, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_LO_DS",/* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_TOC16_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_signed, /* complain_on_overflow */
1170 ppc64_elf_toc_reloc, /* special_function */
1171 "R_PPC64_TOC16_DS", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_dont, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_LO_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1193 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1194 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_signed, /* complain_on_overflow */
1201 ppc64_elf_unhandled_reloc, /* special_function */
1202 "R_PPC64_PLTGOT16_DS", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1209 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1210 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1211 0, /* rightshift */
1212 1, /* size (0 = byte, 1 = short, 2 = long) */
1213 16, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_dont, /* complain_on_overflow */
1217 ppc64_elf_unhandled_reloc, /* special_function */
1218 "R_PPC64_PLTGOT16_LO_DS",/* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0xfffc, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Marker reloc for TLS. */
1225 HOWTO (R_PPC64_TLS,
1226 0, /* rightshift */
1227 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 32, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 bfd_elf_generic_reloc, /* special_function */
1233 "R_PPC64_TLS", /* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Computes the load module index of the load module that contains the
1240 definition of its TLS sym. */
1241 HOWTO (R_PPC64_DTPMOD64,
1242 0, /* rightshift */
1243 4, /* size (0 = byte, 1 = short, 2 = long) */
1244 64, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 ppc64_elf_unhandled_reloc, /* special_function */
1249 "R_PPC64_DTPMOD64", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 ONES (64), /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* Computes a dtv-relative displacement, the difference between the value
1256 of sym+add and the base address of the thread-local storage block that
1257 contains the definition of sym, minus 0x8000. */
1258 HOWTO (R_PPC64_DTPREL64,
1259 0, /* rightshift */
1260 4, /* size (0 = byte, 1 = short, 2 = long) */
1261 64, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_dont, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_DTPREL64", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 ONES (64), /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* A 16 bit dtprel reloc. */
1273 HOWTO (R_PPC64_DTPREL16,
1274 0, /* rightshift */
1275 1, /* size (0 = byte, 1 = short, 2 = long) */
1276 16, /* bitsize */
1277 FALSE, /* pc_relative */
1278 0, /* bitpos */
1279 complain_overflow_signed, /* complain_on_overflow */
1280 ppc64_elf_unhandled_reloc, /* special_function */
1281 "R_PPC64_DTPREL16", /* name */
1282 FALSE, /* partial_inplace */
1283 0, /* src_mask */
1284 0xffff, /* dst_mask */
1285 FALSE), /* pcrel_offset */
1286
1287 /* Like DTPREL16, but no overflow. */
1288 HOWTO (R_PPC64_DTPREL16_LO,
1289 0, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc64_elf_unhandled_reloc, /* special_function */
1296 "R_PPC64_DTPREL16_LO", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1303 HOWTO (R_PPC64_DTPREL16_HI,
1304 16, /* rightshift */
1305 1, /* size (0 = byte, 1 = short, 2 = long) */
1306 16, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL16_HI", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0xffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1318 HOWTO (R_PPC64_DTPREL16_HA,
1319 16, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16_HA", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1333 HOWTO (R_PPC64_DTPREL16_HIGHER,
1334 32, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_HIGHER", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1349 32, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HIGHERA", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1364 48, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HIGHEST", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1378 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1379 48, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_dont, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16, but for insns with a DS field. */
1393 HOWTO (R_PPC64_DTPREL16_DS,
1394 0, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_signed, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_DS", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xfffc, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Like DTPREL16_DS, but no overflow. */
1408 HOWTO (R_PPC64_DTPREL16_LO_DS,
1409 0, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_DTPREL16_LO_DS", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xfffc, /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* Computes a tp-relative displacement, the difference between the value of
1423 sym+add and the value of the thread pointer (r13). */
1424 HOWTO (R_PPC64_TPREL64,
1425 0, /* rightshift */
1426 4, /* size (0 = byte, 1 = short, 2 = long) */
1427 64, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_TPREL64", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 ONES (64), /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* A 16 bit tprel reloc. */
1439 HOWTO (R_PPC64_TPREL16,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_signed, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_TPREL16", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like TPREL16, but no overflow. */
1454 HOWTO (R_PPC64_TPREL16_LO,
1455 0, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_TPREL16_LO", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like TPREL16_LO, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_TPREL16_HI,
1470 16, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL16_HI", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like TPREL16_HI, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_TPREL16_HA,
1485 16, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16_HA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16_HI, but next higher group of 16 bits. */
1499 HOWTO (R_PPC64_TPREL16_HIGHER,
1500 32, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_HIGHER", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HIGHERA,
1515 32, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HIGHERA", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HIGHEST,
1530 48, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HIGHEST", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1544 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1545 48, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_dont, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_HIGHESTA", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xffff, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16, but for insns with a DS field. */
1559 HOWTO (R_PPC64_TPREL16_DS,
1560 0, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_signed, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_DS", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xfffc, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Like TPREL16_DS, but no overflow. */
1574 HOWTO (R_PPC64_TPREL16_LO_DS,
1575 0, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_dont, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_TPREL16_LO_DS", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xfffc, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1589 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1590 to the first entry relative to the TOC base (r2). */
1591 HOWTO (R_PPC64_GOT_TLSGD16,
1592 0, /* rightshift */
1593 1, /* size (0 = byte, 1 = short, 2 = long) */
1594 16, /* bitsize */
1595 FALSE, /* pc_relative */
1596 0, /* bitpos */
1597 complain_overflow_signed, /* complain_on_overflow */
1598 ppc64_elf_unhandled_reloc, /* special_function */
1599 "R_PPC64_GOT_TLSGD16", /* name */
1600 FALSE, /* partial_inplace */
1601 0, /* src_mask */
1602 0xffff, /* dst_mask */
1603 FALSE), /* pcrel_offset */
1604
1605 /* Like GOT_TLSGD16, but no overflow. */
1606 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1607 0, /* rightshift */
1608 1, /* size (0 = byte, 1 = short, 2 = long) */
1609 16, /* bitsize */
1610 FALSE, /* pc_relative */
1611 0, /* bitpos */
1612 complain_overflow_dont, /* complain_on_overflow */
1613 ppc64_elf_unhandled_reloc, /* special_function */
1614 "R_PPC64_GOT_TLSGD16_LO", /* name */
1615 FALSE, /* partial_inplace */
1616 0, /* src_mask */
1617 0xffff, /* dst_mask */
1618 FALSE), /* pcrel_offset */
1619
1620 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1621 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1622 16, /* rightshift */
1623 1, /* size (0 = byte, 1 = short, 2 = long) */
1624 16, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont, /* complain_on_overflow */
1628 ppc64_elf_unhandled_reloc, /* special_function */
1629 "R_PPC64_GOT_TLSGD16_HI", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0xffff, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1636 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1637 16, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_dont, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSGD16_HA", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1651 with values (sym+add)@dtpmod and zero, and computes the offset to the
1652 first entry relative to the TOC base (r2). */
1653 HOWTO (R_PPC64_GOT_TLSLD16,
1654 0, /* rightshift */
1655 1, /* size (0 = byte, 1 = short, 2 = long) */
1656 16, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_signed, /* complain_on_overflow */
1660 ppc64_elf_unhandled_reloc, /* special_function */
1661 "R_PPC64_GOT_TLSLD16", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0xffff, /* dst_mask */
1665 FALSE), /* pcrel_offset */
1666
1667 /* Like GOT_TLSLD16, but no overflow. */
1668 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1669 0, /* rightshift */
1670 1, /* size (0 = byte, 1 = short, 2 = long) */
1671 16, /* bitsize */
1672 FALSE, /* pc_relative */
1673 0, /* bitpos */
1674 complain_overflow_dont, /* complain_on_overflow */
1675 ppc64_elf_unhandled_reloc, /* special_function */
1676 "R_PPC64_GOT_TLSLD16_LO", /* name */
1677 FALSE, /* partial_inplace */
1678 0, /* src_mask */
1679 0xffff, /* dst_mask */
1680 FALSE), /* pcrel_offset */
1681
1682 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1683 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1684 16, /* rightshift */
1685 1, /* size (0 = byte, 1 = short, 2 = long) */
1686 16, /* bitsize */
1687 FALSE, /* pc_relative */
1688 0, /* bitpos */
1689 complain_overflow_dont, /* complain_on_overflow */
1690 ppc64_elf_unhandled_reloc, /* special_function */
1691 "R_PPC64_GOT_TLSLD16_HI", /* name */
1692 FALSE, /* partial_inplace */
1693 0, /* src_mask */
1694 0xffff, /* dst_mask */
1695 FALSE), /* pcrel_offset */
1696
1697 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1698 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1699 16, /* rightshift */
1700 1, /* size (0 = byte, 1 = short, 2 = long) */
1701 16, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
1704 complain_overflow_dont, /* complain_on_overflow */
1705 ppc64_elf_unhandled_reloc, /* special_function */
1706 "R_PPC64_GOT_TLSLD16_HA", /* name */
1707 FALSE, /* partial_inplace */
1708 0, /* src_mask */
1709 0xffff, /* dst_mask */
1710 FALSE), /* pcrel_offset */
1711
1712 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1713 the offset to the entry relative to the TOC base (r2). */
1714 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_signed, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_DTPREL16_DS", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xfffc, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_DTPREL16_DS, but no overflow. */
1729 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1730 0, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xfffc, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1744 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_DTPREL16_HI", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1759 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1760 16, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_dont, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_DTPREL16_HA", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1774 offset to the entry relative to the TOC base (r2). */
1775 HOWTO (R_PPC64_GOT_TPREL16_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_signed, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_TPREL16_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_TPREL16_DS, but no overflow. */
1790 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1791 0, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xfffc, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1805 HOWTO (R_PPC64_GOT_TPREL16_HI,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_TPREL16_HI", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1820 HOWTO (R_PPC64_GOT_TPREL16_HA,
1821 16, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_dont, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_TPREL16_HA", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xffff, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* GNU extension to record C++ vtable hierarchy. */
1835 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1836 0, /* rightshift */
1837 0, /* size (0 = byte, 1 = short, 2 = long) */
1838 0, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 NULL, /* special_function */
1843 "R_PPC64_GNU_VTINHERIT", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* GNU extension to record C++ vtable member usage. */
1850 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1851 0, /* rightshift */
1852 0, /* size (0 = byte, 1 = short, 2 = long) */
1853 0, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_dont, /* complain_on_overflow */
1857 NULL, /* special_function */
1858 "R_PPC64_GNU_VTENTRY", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863 };
1864
1865 \f
1866 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1867 be done. */
1868
1869 static void
1870 ppc_howto_init (void)
1871 {
1872 unsigned int i, type;
1873
1874 for (i = 0;
1875 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1876 i++)
1877 {
1878 type = ppc64_elf_howto_raw[i].type;
1879 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1880 / sizeof (ppc64_elf_howto_table[0])));
1881 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1882 }
1883 }
1884
1885 static reloc_howto_type *
1886 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1887 bfd_reloc_code_real_type code)
1888 {
1889 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1890
1891 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1892 /* Initialize howto table if needed. */
1893 ppc_howto_init ();
1894
1895 switch (code)
1896 {
1897 default:
1898 return NULL;
1899
1900 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1901 break;
1902 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1903 break;
1904 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1905 break;
1906 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1907 break;
1908 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1909 break;
1910 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1911 break;
1912 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1913 break;
1914 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1915 break;
1916 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1917 break;
1918 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1919 break;
1920 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1921 break;
1922 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1923 break;
1924 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1925 break;
1926 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1927 break;
1928 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1929 break;
1930 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1931 break;
1932 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1933 break;
1934 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1935 break;
1936 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1937 break;
1938 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1939 break;
1940 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1941 break;
1942 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1943 break;
1944 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1945 break;
1946 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1947 break;
1948 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1949 break;
1950 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1951 break;
1952 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1953 break;
1954 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1955 break;
1956 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1957 break;
1958 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1959 break;
1960 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1961 break;
1962 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1963 break;
1964 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1965 break;
1966 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1967 break;
1968 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1969 break;
1970 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1971 break;
1972 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1973 break;
1974 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1975 break;
1976 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1977 break;
1978 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1979 break;
1980 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1981 break;
1982 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1983 break;
1984 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1985 break;
1986 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1987 break;
1988 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1989 break;
1990 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1991 break;
1992 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1993 break;
1994 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1995 break;
1996 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1997 break;
1998 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1999 break;
2000 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2001 break;
2002 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2003 break;
2004 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2007 break;
2008 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2009 break;
2010 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2019 break;
2020 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2021 break;
2022 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2023 break;
2024 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2025 break;
2026 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2027 break;
2028 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2029 break;
2030 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2031 break;
2032 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2033 break;
2034 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2035 break;
2036 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2037 break;
2038 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2065 break;
2066 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2067 break;
2068 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2071 break;
2072 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2073 break;
2074 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2075 break;
2076 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2077 break;
2078 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2079 break;
2080 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2085 break;
2086 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2087 break;
2088 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2089 break;
2090 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2091 break;
2092 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2097 break;
2098 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2099 break;
2100 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2101 break;
2102 }
2103
2104 return ppc64_elf_howto_table[r];
2105 };
2106
2107 /* Set the howto pointer for a PowerPC ELF reloc. */
2108
2109 static void
2110 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2111 Elf_Internal_Rela *dst)
2112 {
2113 unsigned int type;
2114
2115 /* Initialize howto table if needed. */
2116 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2117 ppc_howto_init ();
2118
2119 type = ELF64_R_TYPE (dst->r_info);
2120 if (type >= (sizeof (ppc64_elf_howto_table)
2121 / sizeof (ppc64_elf_howto_table[0])))
2122 {
2123 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2124 abfd, (int) type);
2125 type = R_PPC64_NONE;
2126 }
2127 cache_ptr->howto = ppc64_elf_howto_table[type];
2128 }
2129
2130 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2131
2132 static bfd_reloc_status_type
2133 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2134 void *data, asection *input_section,
2135 bfd *output_bfd, char **error_message)
2136 {
2137 /* If this is a relocatable link (output_bfd test tells us), just
2138 call the generic function. Any adjustment will be done at final
2139 link time. */
2140 if (output_bfd != NULL)
2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2142 input_section, output_bfd, error_message);
2143
2144 /* Adjust the addend for sign extension of the low 16 bits.
2145 We won't actually be using the low 16 bits, so trashing them
2146 doesn't matter. */
2147 reloc_entry->addend += 0x8000;
2148 return bfd_reloc_continue;
2149 }
2150
2151 static bfd_reloc_status_type
2152 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2153 void *data, asection *input_section,
2154 bfd *output_bfd, char **error_message)
2155 {
2156 if (output_bfd != NULL)
2157 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2158 input_section, output_bfd, error_message);
2159
2160 if (strcmp (symbol->section->name, ".opd") == 0
2161 && (symbol->section->owner->flags & DYNAMIC) == 0)
2162 {
2163 bfd_vma dest = opd_entry_value (symbol->section,
2164 symbol->value + reloc_entry->addend,
2165 NULL, NULL);
2166 if (dest != (bfd_vma) -1)
2167 reloc_entry->addend = dest - (symbol->value
2168 + symbol->section->output_section->vma
2169 + symbol->section->output_offset);
2170 }
2171 return bfd_reloc_continue;
2172 }
2173
2174 static bfd_reloc_status_type
2175 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2176 void *data, asection *input_section,
2177 bfd *output_bfd, char **error_message)
2178 {
2179 long insn;
2180 enum elf_ppc64_reloc_type r_type;
2181 bfd_size_type octets;
2182 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2183 bfd_boolean is_power4 = FALSE;
2184
2185 /* If this is a relocatable link (output_bfd test tells us), just
2186 call the generic function. Any adjustment will be done at final
2187 link time. */
2188 if (output_bfd != NULL)
2189 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2190 input_section, output_bfd, error_message);
2191
2192 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2193 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2194 insn &= ~(0x01 << 21);
2195 r_type = reloc_entry->howto->type;
2196 if (r_type == R_PPC64_ADDR14_BRTAKEN
2197 || r_type == R_PPC64_REL14_BRTAKEN)
2198 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2199
2200 if (is_power4)
2201 {
2202 /* Set 'a' bit. This is 0b00010 in BO field for branch
2203 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2204 for branch on CTR insns (BO == 1a00t or 1a01t). */
2205 if ((insn & (0x14 << 21)) == (0x04 << 21))
2206 insn |= 0x02 << 21;
2207 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2208 insn |= 0x08 << 21;
2209 else
2210 goto out;
2211 }
2212 else
2213 {
2214 bfd_vma target = 0;
2215 bfd_vma from;
2216
2217 if (!bfd_is_com_section (symbol->section))
2218 target = symbol->value;
2219 target += symbol->section->output_section->vma;
2220 target += symbol->section->output_offset;
2221 target += reloc_entry->addend;
2222
2223 from = (reloc_entry->address
2224 + input_section->output_offset
2225 + input_section->output_section->vma);
2226
2227 /* Invert 'y' bit if not the default. */
2228 if ((bfd_signed_vma) (target - from) < 0)
2229 insn ^= 0x01 << 21;
2230 }
2231 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2232 out:
2233 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2234 input_section, output_bfd, error_message);
2235 }
2236
2237 static bfd_reloc_status_type
2238 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2239 void *data, asection *input_section,
2240 bfd *output_bfd, char **error_message)
2241 {
2242 /* If this is a relocatable link (output_bfd test tells us), just
2243 call the generic function. Any adjustment will be done at final
2244 link time. */
2245 if (output_bfd != NULL)
2246 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2247 input_section, output_bfd, error_message);
2248
2249 /* Subtract the symbol section base address. */
2250 reloc_entry->addend -= symbol->section->output_section->vma;
2251 return bfd_reloc_continue;
2252 }
2253
2254 static bfd_reloc_status_type
2255 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2256 void *data, asection *input_section,
2257 bfd *output_bfd, char **error_message)
2258 {
2259 /* If this is a relocatable link (output_bfd test tells us), just
2260 call the generic function. Any adjustment will be done at final
2261 link time. */
2262 if (output_bfd != NULL)
2263 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265
2266 /* Subtract the symbol section base address. */
2267 reloc_entry->addend -= symbol->section->output_section->vma;
2268
2269 /* Adjust the addend for sign extension of the low 16 bits. */
2270 reloc_entry->addend += 0x8000;
2271 return bfd_reloc_continue;
2272 }
2273
2274 static bfd_reloc_status_type
2275 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2276 void *data, asection *input_section,
2277 bfd *output_bfd, char **error_message)
2278 {
2279 bfd_vma TOCstart;
2280
2281 /* If this is a relocatable link (output_bfd test tells us), just
2282 call the generic function. Any adjustment will be done at final
2283 link time. */
2284 if (output_bfd != NULL)
2285 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2286 input_section, output_bfd, error_message);
2287
2288 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2289 if (TOCstart == 0)
2290 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2291
2292 /* Subtract the TOC base address. */
2293 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2294 return bfd_reloc_continue;
2295 }
2296
2297 static bfd_reloc_status_type
2298 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2299 void *data, asection *input_section,
2300 bfd *output_bfd, char **error_message)
2301 {
2302 bfd_vma TOCstart;
2303
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2312 if (TOCstart == 0)
2313 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2314
2315 /* Subtract the TOC base address. */
2316 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2317
2318 /* Adjust the addend for sign extension of the low 16 bits. */
2319 reloc_entry->addend += 0x8000;
2320 return bfd_reloc_continue;
2321 }
2322
2323 static bfd_reloc_status_type
2324 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2325 void *data, asection *input_section,
2326 bfd *output_bfd, char **error_message)
2327 {
2328 bfd_vma TOCstart;
2329 bfd_size_type octets;
2330
2331 /* If this is a relocatable link (output_bfd test tells us), just
2332 call the generic function. Any adjustment will be done at final
2333 link time. */
2334 if (output_bfd != NULL)
2335 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2336 input_section, output_bfd, error_message);
2337
2338 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2339 if (TOCstart == 0)
2340 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2341
2342 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2343 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2344 return bfd_reloc_ok;
2345 }
2346
2347 static bfd_reloc_status_type
2348 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2349 void *data, asection *input_section,
2350 bfd *output_bfd, char **error_message)
2351 {
2352 /* If this is a relocatable link (output_bfd test tells us), just
2353 call the generic function. Any adjustment will be done at final
2354 link time. */
2355 if (output_bfd != NULL)
2356 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2357 input_section, output_bfd, error_message);
2358
2359 if (error_message != NULL)
2360 {
2361 static char buf[60];
2362 sprintf (buf, "generic linker can't handle %s",
2363 reloc_entry->howto->name);
2364 *error_message = buf;
2365 }
2366 return bfd_reloc_dangerous;
2367 }
2368
2369 struct ppc64_elf_obj_tdata
2370 {
2371 struct elf_obj_tdata elf;
2372
2373 /* Shortcuts to dynamic linker sections. */
2374 asection *got;
2375 asection *relgot;
2376
2377 union {
2378 /* Used during garbage collection. We attach global symbols defined
2379 on removed .opd entries to this section so that the sym is removed. */
2380 asection *deleted_section;
2381
2382 /* Used when adding symbols. */
2383 bfd_boolean has_dotsym;
2384 } u;
2385
2386 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2387 sections means we potentially need one of these for each input bfd. */
2388 union {
2389 bfd_signed_vma refcount;
2390 bfd_vma offset;
2391 } tlsld_got;
2392
2393 /* A copy of relocs before they are modified for --emit-relocs. */
2394 Elf_Internal_Rela *opd_relocs;
2395 };
2396
2397 #define ppc64_elf_tdata(bfd) \
2398 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2399
2400 #define ppc64_tlsld_got(bfd) \
2401 (&ppc64_elf_tdata (bfd)->tlsld_got)
2402
2403 /* Override the generic function because we store some extras. */
2404
2405 static bfd_boolean
2406 ppc64_elf_mkobject (bfd *abfd)
2407 {
2408 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2409 abfd->tdata.any = bfd_zalloc (abfd, amt);
2410 if (abfd->tdata.any == NULL)
2411 return FALSE;
2412 return TRUE;
2413 }
2414
2415 /* Return 1 if target is one of ours. */
2416
2417 static bfd_boolean
2418 is_ppc64_elf_target (const struct bfd_target *targ)
2419 {
2420 extern const bfd_target bfd_elf64_powerpc_vec;
2421 extern const bfd_target bfd_elf64_powerpcle_vec;
2422
2423 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2424 }
2425
2426 /* Fix bad default arch selected for a 64 bit input bfd when the
2427 default is 32 bit. */
2428
2429 static bfd_boolean
2430 ppc64_elf_object_p (bfd *abfd)
2431 {
2432 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2433 {
2434 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2435
2436 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2437 {
2438 /* Relies on arch after 32 bit default being 64 bit default. */
2439 abfd->arch_info = abfd->arch_info->next;
2440 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2441 }
2442 }
2443 return TRUE;
2444 }
2445
2446 /* Support for core dump NOTE sections. */
2447
2448 static bfd_boolean
2449 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2450 {
2451 size_t offset, size;
2452
2453 if (note->descsz != 504)
2454 return FALSE;
2455
2456 /* pr_cursig */
2457 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2458
2459 /* pr_pid */
2460 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2461
2462 /* pr_reg */
2463 offset = 112;
2464 size = 384;
2465
2466 /* Make a ".reg/999" section. */
2467 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2468 size, note->descpos + offset);
2469 }
2470
2471 static bfd_boolean
2472 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2473 {
2474 if (note->descsz != 136)
2475 return FALSE;
2476
2477 elf_tdata (abfd)->core_program
2478 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2479 elf_tdata (abfd)->core_command
2480 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2481
2482 return TRUE;
2483 }
2484
2485 /* Merge backend specific data from an object file to the output
2486 object file when linking. */
2487
2488 static bfd_boolean
2489 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2490 {
2491 /* Check if we have the same endianess. */
2492 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2493 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2494 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2495 {
2496 const char *msg;
2497
2498 if (bfd_big_endian (ibfd))
2499 msg = _("%B: compiled for a big endian system "
2500 "and target is little endian");
2501 else
2502 msg = _("%B: compiled for a little endian system "
2503 "and target is big endian");
2504
2505 (*_bfd_error_handler) (msg, ibfd);
2506
2507 bfd_set_error (bfd_error_wrong_format);
2508 return FALSE;
2509 }
2510
2511 return TRUE;
2512 }
2513
2514 /* Add extra PPC sections. */
2515
2516 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2517 {
2518 { ".plt", 4, 0, SHT_NOBITS, 0 },
2519 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2520 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2521 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2524 { NULL, 0, 0, 0, 0 }
2525 };
2526
2527 struct _ppc64_elf_section_data
2528 {
2529 struct bfd_elf_section_data elf;
2530
2531 /* An array with one entry for each opd function descriptor. */
2532 union
2533 {
2534 /* Points to the function code section for local opd entries. */
2535 asection **func_sec;
2536 /* After editing .opd, adjust references to opd local syms. */
2537 long *adjust;
2538 } opd;
2539
2540 /* An array for toc sections, indexed by offset/8.
2541 Specifies the relocation symbol index used at a given toc offset. */
2542 unsigned *t_symndx;
2543 };
2544
2545 #define ppc64_elf_section_data(sec) \
2546 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2547
2548 static bfd_boolean
2549 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2550 {
2551 struct _ppc64_elf_section_data *sdata;
2552 bfd_size_type amt = sizeof (*sdata);
2553
2554 sdata = bfd_zalloc (abfd, amt);
2555 if (sdata == NULL)
2556 return FALSE;
2557 sec->used_by_bfd = sdata;
2558
2559 return _bfd_elf_new_section_hook (abfd, sec);
2560 }
2561
2562 static void *
2563 get_opd_info (asection * sec)
2564 {
2565 if (sec != NULL
2566 && ppc64_elf_section_data (sec) != NULL
2567 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2568 return ppc64_elf_section_data (sec)->opd.adjust;
2569 return NULL;
2570 }
2571 \f
2572 /* Parameters for the qsort hook. */
2573 static asection *synthetic_opd;
2574 static bfd_boolean synthetic_relocatable;
2575
2576 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2577
2578 static int
2579 compare_symbols (const void *ap, const void *bp)
2580 {
2581 const asymbol *a = * (const asymbol **) ap;
2582 const asymbol *b = * (const asymbol **) bp;
2583
2584 /* Section symbols first. */
2585 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2586 return -1;
2587 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2588 return 1;
2589
2590 /* then .opd symbols. */
2591 if (a->section == synthetic_opd && b->section != synthetic_opd)
2592 return -1;
2593 if (a->section != synthetic_opd && b->section == synthetic_opd)
2594 return 1;
2595
2596 /* then other code symbols. */
2597 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2598 == (SEC_CODE | SEC_ALLOC)
2599 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2600 != (SEC_CODE | SEC_ALLOC))
2601 return -1;
2602
2603 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2604 != (SEC_CODE | SEC_ALLOC)
2605 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2606 == (SEC_CODE | SEC_ALLOC))
2607 return 1;
2608
2609 if (synthetic_relocatable)
2610 {
2611 if (a->section->id < b->section->id)
2612 return -1;
2613
2614 if (a->section->id > b->section->id)
2615 return 1;
2616 }
2617
2618 if (a->value + a->section->vma < b->value + b->section->vma)
2619 return -1;
2620
2621 if (a->value + a->section->vma > b->value + b->section->vma)
2622 return 1;
2623
2624 return 0;
2625 }
2626
2627 /* Search SYMS for a symbol of the given VALUE. */
2628
2629 static asymbol *
2630 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2631 {
2632 long mid;
2633
2634 if (id == -1)
2635 {
2636 while (lo < hi)
2637 {
2638 mid = (lo + hi) >> 1;
2639 if (syms[mid]->value + syms[mid]->section->vma < value)
2640 lo = mid + 1;
2641 else if (syms[mid]->value + syms[mid]->section->vma > value)
2642 hi = mid;
2643 else
2644 return syms[mid];
2645 }
2646 }
2647 else
2648 {
2649 while (lo < hi)
2650 {
2651 mid = (lo + hi) >> 1;
2652 if (syms[mid]->section->id < id)
2653 lo = mid + 1;
2654 else if (syms[mid]->section->id > id)
2655 hi = mid;
2656 else if (syms[mid]->value < value)
2657 lo = mid + 1;
2658 else if (syms[mid]->value > value)
2659 hi = mid;
2660 else
2661 return syms[mid];
2662 }
2663 }
2664 return NULL;
2665 }
2666
2667 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2668 entry syms. */
2669
2670 static long
2671 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2672 long static_count, asymbol **static_syms,
2673 long dyn_count, asymbol **dyn_syms,
2674 asymbol **ret)
2675 {
2676 asymbol *s;
2677 long i;
2678 long count;
2679 char *names;
2680 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2681 asection *opd;
2682 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2683 asymbol **syms;
2684
2685 *ret = NULL;
2686
2687 opd = bfd_get_section_by_name (abfd, ".opd");
2688 if (opd == NULL)
2689 return 0;
2690
2691 symcount = static_count;
2692 if (!relocatable)
2693 symcount += dyn_count;
2694 if (symcount == 0)
2695 return 0;
2696
2697 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2698 if (syms == NULL)
2699 return -1;
2700
2701 if (!relocatable && static_count != 0 && dyn_count != 0)
2702 {
2703 /* Use both symbol tables. */
2704 memcpy (syms, static_syms, static_count * sizeof (*syms));
2705 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2706 }
2707 else if (!relocatable && static_count == 0)
2708 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2709 else
2710 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2711
2712 synthetic_opd = opd;
2713 synthetic_relocatable = relocatable;
2714 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2715
2716 if (!relocatable && symcount > 1)
2717 {
2718 long j;
2719 /* Trim duplicate syms, since we may have merged the normal and
2720 dynamic symbols. Actually, we only care about syms that have
2721 different values, so trim any with the same value. */
2722 for (i = 1, j = 1; i < symcount; ++i)
2723 if (syms[i - 1]->value + syms[i - 1]->section->vma
2724 != syms[i]->value + syms[i]->section->vma)
2725 syms[j++] = syms[i];
2726 symcount = j;
2727 }
2728
2729 i = 0;
2730 if (syms[i]->section == opd)
2731 ++i;
2732 codesecsym = i;
2733
2734 for (; i < symcount; ++i)
2735 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2736 != (SEC_CODE | SEC_ALLOC))
2737 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2738 break;
2739 codesecsymend = i;
2740
2741 for (; i < symcount; ++i)
2742 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2743 break;
2744 secsymend = i;
2745
2746 for (; i < symcount; ++i)
2747 if (syms[i]->section != opd)
2748 break;
2749 opdsymend = i;
2750
2751 for (; i < symcount; ++i)
2752 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2753 != (SEC_CODE | SEC_ALLOC))
2754 break;
2755 symcount = i;
2756
2757 count = 0;
2758 if (opdsymend == secsymend)
2759 goto done;
2760
2761 if (relocatable)
2762 {
2763 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2764 arelent *r;
2765 size_t size;
2766 long relcount;
2767
2768 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2769 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2770 if (relcount == 0)
2771 goto done;
2772
2773 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2774 {
2775 count = -1;
2776 goto done;
2777 }
2778
2779 size = 0;
2780 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2781 {
2782 asymbol *sym;
2783
2784 while (r < opd->relocation + relcount
2785 && r->address < syms[i]->value + opd->vma)
2786 ++r;
2787
2788 if (r == opd->relocation + relcount)
2789 break;
2790
2791 if (r->address != syms[i]->value + opd->vma)
2792 continue;
2793
2794 if (r->howto->type != R_PPC64_ADDR64)
2795 continue;
2796
2797 sym = *r->sym_ptr_ptr;
2798 if (!sym_exists_at (syms, opdsymend, symcount,
2799 sym->section->id, sym->value + r->addend))
2800 {
2801 ++count;
2802 size += sizeof (asymbol);
2803 size += strlen (syms[i]->name) + 2;
2804 }
2805 }
2806
2807 s = *ret = bfd_malloc (size);
2808 if (s == NULL)
2809 {
2810 count = -1;
2811 goto done;
2812 }
2813
2814 names = (char *) (s + count);
2815
2816 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2817 {
2818 asymbol *sym;
2819
2820 while (r < opd->relocation + relcount
2821 && r->address < syms[i]->value + opd->vma)
2822 ++r;
2823
2824 if (r == opd->relocation + relcount)
2825 break;
2826
2827 if (r->address != syms[i]->value + opd->vma)
2828 continue;
2829
2830 if (r->howto->type != R_PPC64_ADDR64)
2831 continue;
2832
2833 sym = *r->sym_ptr_ptr;
2834 if (!sym_exists_at (syms, opdsymend, symcount,
2835 sym->section->id, sym->value + r->addend))
2836 {
2837 size_t len;
2838
2839 *s = *syms[i];
2840 s->section = sym->section;
2841 s->value = sym->value + r->addend;
2842 s->name = names;
2843 *names++ = '.';
2844 len = strlen (syms[i]->name);
2845 memcpy (names, syms[i]->name, len + 1);
2846 names += len + 1;
2847 s++;
2848 }
2849 }
2850 }
2851 else
2852 {
2853 bfd_byte *contents;
2854 size_t size;
2855
2856 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2857 {
2858 if (contents)
2859 {
2860 free_contents_and_exit:
2861 free (contents);
2862 }
2863 count = -1;
2864 goto done;
2865 }
2866
2867 size = 0;
2868 for (i = secsymend; i < opdsymend; ++i)
2869 {
2870 bfd_vma ent;
2871
2872 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2873 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2874 {
2875 ++count;
2876 size += sizeof (asymbol);
2877 size += strlen (syms[i]->name) + 2;
2878 }
2879 }
2880
2881 s = *ret = bfd_malloc (size);
2882 if (s == NULL)
2883 goto free_contents_and_exit;
2884
2885 names = (char *) (s + count);
2886
2887 for (i = secsymend; i < opdsymend; ++i)
2888 {
2889 bfd_vma ent;
2890
2891 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2892 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2893 {
2894 long lo, hi;
2895 size_t len;
2896 asection *sec = abfd->sections;
2897
2898 *s = *syms[i];
2899 lo = codesecsym;
2900 hi = codesecsymend;
2901 while (lo < hi)
2902 {
2903 long mid = (lo + hi) >> 1;
2904 if (syms[mid]->section->vma < ent)
2905 lo = mid + 1;
2906 else if (syms[mid]->section->vma > ent)
2907 hi = mid;
2908 else
2909 {
2910 sec = syms[mid]->section;
2911 break;
2912 }
2913 }
2914
2915 if (lo >= hi && lo > codesecsym)
2916 sec = syms[lo - 1]->section;
2917
2918 for (; sec != NULL; sec = sec->next)
2919 {
2920 if (sec->vma > ent)
2921 break;
2922 if ((sec->flags & SEC_ALLOC) == 0
2923 || (sec->flags & SEC_LOAD) == 0)
2924 break;
2925 if ((sec->flags & SEC_CODE) != 0)
2926 s->section = sec;
2927 }
2928 s->value = ent - s->section->vma;
2929 s->name = names;
2930 *names++ = '.';
2931 len = strlen (syms[i]->name);
2932 memcpy (names, syms[i]->name, len + 1);
2933 names += len + 1;
2934 s++;
2935 }
2936 }
2937 free (contents);
2938 }
2939
2940 done:
2941 free (syms);
2942 return count;
2943 }
2944 \f
2945 /* The following functions are specific to the ELF linker, while
2946 functions above are used generally. Those named ppc64_elf_* are
2947 called by the main ELF linker code. They appear in this file more
2948 or less in the order in which they are called. eg.
2949 ppc64_elf_check_relocs is called early in the link process,
2950 ppc64_elf_finish_dynamic_sections is one of the last functions
2951 called.
2952
2953 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2954 functions have both a function code symbol and a function descriptor
2955 symbol. A call to foo in a relocatable object file looks like:
2956
2957 . .text
2958 . x:
2959 . bl .foo
2960 . nop
2961
2962 The function definition in another object file might be:
2963
2964 . .section .opd
2965 . foo: .quad .foo
2966 . .quad .TOC.@tocbase
2967 . .quad 0
2968 .
2969 . .text
2970 . .foo: blr
2971
2972 When the linker resolves the call during a static link, the branch
2973 unsurprisingly just goes to .foo and the .opd information is unused.
2974 If the function definition is in a shared library, things are a little
2975 different: The call goes via a plt call stub, the opd information gets
2976 copied to the plt, and the linker patches the nop.
2977
2978 . x:
2979 . bl .foo_stub
2980 . ld 2,40(1)
2981 .
2982 .
2983 . .foo_stub:
2984 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2985 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2986 . std 2,40(1) # this is the general idea
2987 . ld 11,0(12)
2988 . ld 2,8(12)
2989 . mtctr 11
2990 . ld 11,16(12)
2991 . bctr
2992 .
2993 . .section .plt
2994 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2995
2996 The "reloc ()" notation is supposed to indicate that the linker emits
2997 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2998 copying.
2999
3000 What are the difficulties here? Well, firstly, the relocations
3001 examined by the linker in check_relocs are against the function code
3002 sym .foo, while the dynamic relocation in the plt is emitted against
3003 the function descriptor symbol, foo. Somewhere along the line, we need
3004 to carefully copy dynamic link information from one symbol to the other.
3005 Secondly, the generic part of the elf linker will make .foo a dynamic
3006 symbol as is normal for most other backends. We need foo dynamic
3007 instead, at least for an application final link. However, when
3008 creating a shared library containing foo, we need to have both symbols
3009 dynamic so that references to .foo are satisfied during the early
3010 stages of linking. Otherwise the linker might decide to pull in a
3011 definition from some other object, eg. a static library.
3012
3013 Update: As of August 2004, we support a new convention. Function
3014 calls may use the function descriptor symbol, ie. "bl foo". This
3015 behaves exactly as "bl .foo". */
3016
3017 /* The linker needs to keep track of the number of relocs that it
3018 decides to copy as dynamic relocs in check_relocs for each symbol.
3019 This is so that it can later discard them if they are found to be
3020 unnecessary. We store the information in a field extending the
3021 regular ELF linker hash table. */
3022
3023 struct ppc_dyn_relocs
3024 {
3025 struct ppc_dyn_relocs *next;
3026
3027 /* The input section of the reloc. */
3028 asection *sec;
3029
3030 /* Total number of relocs copied for the input section. */
3031 bfd_size_type count;
3032
3033 /* Number of pc-relative relocs copied for the input section. */
3034 bfd_size_type pc_count;
3035 };
3036
3037 /* Track GOT entries needed for a given symbol. We might need more
3038 than one got entry per symbol. */
3039 struct got_entry
3040 {
3041 struct got_entry *next;
3042
3043 /* The symbol addend that we'll be placing in the GOT. */
3044 bfd_vma addend;
3045
3046 /* Unlike other ELF targets, we use separate GOT entries for the same
3047 symbol referenced from different input files. This is to support
3048 automatic multiple TOC/GOT sections, where the TOC base can vary
3049 from one input file to another.
3050
3051 Point to the BFD owning this GOT entry. */
3052 bfd *owner;
3053
3054 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3055 TLS_TPREL or TLS_DTPREL for tls entries. */
3056 char tls_type;
3057
3058 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3059 union
3060 {
3061 bfd_signed_vma refcount;
3062 bfd_vma offset;
3063 } got;
3064 };
3065
3066 /* The same for PLT. */
3067 struct plt_entry
3068 {
3069 struct plt_entry *next;
3070
3071 bfd_vma addend;
3072
3073 union
3074 {
3075 bfd_signed_vma refcount;
3076 bfd_vma offset;
3077 } plt;
3078 };
3079
3080 /* Of those relocs that might be copied as dynamic relocs, this macro
3081 selects those that must be copied when linking a shared library,
3082 even when the symbol is local. */
3083
3084 #define MUST_BE_DYN_RELOC(RTYPE) \
3085 ((RTYPE) != R_PPC64_REL32 \
3086 && (RTYPE) != R_PPC64_REL64 \
3087 && (RTYPE) != R_PPC64_REL30)
3088
3089 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3090 copying dynamic variables from a shared lib into an app's dynbss
3091 section, and instead use a dynamic relocation to point into the
3092 shared lib. With code that gcc generates, it's vital that this be
3093 enabled; In the PowerPC64 ABI, the address of a function is actually
3094 the address of a function descriptor, which resides in the .opd
3095 section. gcc uses the descriptor directly rather than going via the
3096 GOT as some other ABI's do, which means that initialized function
3097 pointers must reference the descriptor. Thus, a function pointer
3098 initialized to the address of a function in a shared library will
3099 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3100 redefines the function descriptor symbol to point to the copy. This
3101 presents a problem as a plt entry for that function is also
3102 initialized from the function descriptor symbol and the copy reloc
3103 may not be initialized first. */
3104 #define ELIMINATE_COPY_RELOCS 1
3105
3106 /* Section name for stubs is the associated section name plus this
3107 string. */
3108 #define STUB_SUFFIX ".stub"
3109
3110 /* Linker stubs.
3111 ppc_stub_long_branch:
3112 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3113 destination, but a 24 bit branch in a stub section will reach.
3114 . b dest
3115
3116 ppc_stub_plt_branch:
3117 Similar to the above, but a 24 bit branch in the stub section won't
3118 reach its destination.
3119 . addis %r12,%r2,xxx@toc@ha
3120 . ld %r11,xxx@toc@l(%r12)
3121 . mtctr %r11
3122 . bctr
3123
3124 ppc_stub_plt_call:
3125 Used to call a function in a shared library. If it so happens that
3126 the plt entry referenced crosses a 64k boundary, then an extra
3127 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3128 xxx+16 as appropriate.
3129 . addis %r12,%r2,xxx@toc@ha
3130 . std %r2,40(%r1)
3131 . ld %r11,xxx+0@toc@l(%r12)
3132 . ld %r2,xxx+8@toc@l(%r12)
3133 . mtctr %r11
3134 . ld %r11,xxx+16@toc@l(%r12)
3135 . bctr
3136
3137 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3138 code to adjust the value and save r2 to support multiple toc sections.
3139 A ppc_stub_long_branch with an r2 offset looks like:
3140 . std %r2,40(%r1)
3141 . addis %r2,%r2,off@ha
3142 . addi %r2,%r2,off@l
3143 . b dest
3144
3145 A ppc_stub_plt_branch with an r2 offset looks like:
3146 . std %r2,40(%r1)
3147 . addis %r12,%r2,xxx@toc@ha
3148 . ld %r11,xxx@toc@l(%r12)
3149 . addis %r2,%r2,off@ha
3150 . addi %r2,%r2,off@l
3151 . mtctr %r11
3152 . bctr
3153 */
3154
3155 enum ppc_stub_type {
3156 ppc_stub_none,
3157 ppc_stub_long_branch,
3158 ppc_stub_long_branch_r2off,
3159 ppc_stub_plt_branch,
3160 ppc_stub_plt_branch_r2off,
3161 ppc_stub_plt_call
3162 };
3163
3164 struct ppc_stub_hash_entry {
3165
3166 /* Base hash table entry structure. */
3167 struct bfd_hash_entry root;
3168
3169 enum ppc_stub_type stub_type;
3170
3171 /* The stub section. */
3172 asection *stub_sec;
3173
3174 /* Offset within stub_sec of the beginning of this stub. */
3175 bfd_vma stub_offset;
3176
3177 /* Given the symbol's value and its section we can determine its final
3178 value when building the stubs (so the stub knows where to jump. */
3179 bfd_vma target_value;
3180 asection *target_section;
3181
3182 /* The symbol table entry, if any, that this was derived from. */
3183 struct ppc_link_hash_entry *h;
3184
3185 /* And the reloc addend that this was derived from. */
3186 bfd_vma addend;
3187
3188 /* Where this stub is being called from, or, in the case of combined
3189 stub sections, the first input section in the group. */
3190 asection *id_sec;
3191 };
3192
3193 struct ppc_branch_hash_entry {
3194
3195 /* Base hash table entry structure. */
3196 struct bfd_hash_entry root;
3197
3198 /* Offset within branch lookup table. */
3199 unsigned int offset;
3200
3201 /* Generation marker. */
3202 unsigned int iter;
3203 };
3204
3205 struct ppc_link_hash_entry
3206 {
3207 struct elf_link_hash_entry elf;
3208
3209 /* A pointer to the most recently used stub hash entry against this
3210 symbol. */
3211 struct ppc_stub_hash_entry *stub_cache;
3212
3213 /* Track dynamic relocs copied for this symbol. */
3214 struct ppc_dyn_relocs *dyn_relocs;
3215
3216 /* Link between function code and descriptor symbols. */
3217 struct ppc_link_hash_entry *oh;
3218
3219 /* Flag function code and descriptor symbols. */
3220 unsigned int is_func:1;
3221 unsigned int is_func_descriptor:1;
3222 unsigned int fake:1;
3223
3224 /* Whether global opd/toc sym has been adjusted or not.
3225 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3226 should be set for all globals defined in any opd/toc section. */
3227 unsigned int adjust_done:1;
3228
3229 /* Set if we twiddled this symbol to weak at some stage. */
3230 unsigned int was_undefined:1;
3231
3232 /* Contexts in which symbol is used in the GOT (or TOC).
3233 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3234 corresponding relocs are encountered during check_relocs.
3235 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3236 indicate the corresponding GOT entry type is not needed.
3237 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3238 a TPREL one. We use a separate flag rather than setting TPREL
3239 just for convenience in distinguishing the two cases. */
3240 #define TLS_GD 1 /* GD reloc. */
3241 #define TLS_LD 2 /* LD reloc. */
3242 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3243 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3244 #define TLS_TLS 16 /* Any TLS reloc. */
3245 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3246 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3247 char tls_mask;
3248 };
3249
3250 /* ppc64 ELF linker hash table. */
3251
3252 struct ppc_link_hash_table
3253 {
3254 struct elf_link_hash_table elf;
3255
3256 /* The stub hash table. */
3257 struct bfd_hash_table stub_hash_table;
3258
3259 /* Another hash table for plt_branch stubs. */
3260 struct bfd_hash_table branch_hash_table;
3261
3262 /* Linker stub bfd. */
3263 bfd *stub_bfd;
3264
3265 /* Linker call-backs. */
3266 asection * (*add_stub_section) (const char *, asection *);
3267 void (*layout_sections_again) (void);
3268
3269 /* Array to keep track of which stub sections have been created, and
3270 information on stub grouping. */
3271 struct map_stub {
3272 /* This is the section to which stubs in the group will be attached. */
3273 asection *link_sec;
3274 /* The stub section. */
3275 asection *stub_sec;
3276 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3277 bfd_vma toc_off;
3278 } *stub_group;
3279
3280 /* Temp used when calculating TOC pointers. */
3281 bfd_vma toc_curr;
3282
3283 /* Highest input section id. */
3284 int top_id;
3285
3286 /* Highest output section index. */
3287 int top_index;
3288
3289 /* List of input sections for each output section. */
3290 asection **input_list;
3291
3292 /* Short-cuts to get to dynamic linker sections. */
3293 asection *got;
3294 asection *plt;
3295 asection *relplt;
3296 asection *dynbss;
3297 asection *relbss;
3298 asection *glink;
3299 asection *sfpr;
3300 asection *brlt;
3301 asection *relbrlt;
3302
3303 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3304 struct ppc_link_hash_entry *tls_get_addr;
3305 struct ppc_link_hash_entry *tls_get_addr_fd;
3306
3307 /* Statistics. */
3308 unsigned long stub_count[ppc_stub_plt_call];
3309
3310 /* Number of stubs against global syms. */
3311 unsigned long stub_globals;
3312
3313 /* Set if we should emit symbols for stubs. */
3314 unsigned int emit_stub_syms:1;
3315
3316 /* Support for multiple toc sections. */
3317 unsigned int no_multi_toc:1;
3318 unsigned int multi_toc_needed:1;
3319
3320 /* Set on error. */
3321 unsigned int stub_error:1;
3322
3323 /* Flag set when small branches are detected. Used to
3324 select suitable defaults for the stub group size. */
3325 unsigned int has_14bit_branch:1;
3326
3327 /* Temp used by ppc64_elf_check_directives. */
3328 unsigned int twiddled_syms:1;
3329
3330 /* Incremented every time we size stubs. */
3331 unsigned int stub_iteration;
3332
3333 /* Small local sym to section mapping cache. */
3334 struct sym_sec_cache sym_sec;
3335 };
3336
3337 /* Rename some of the generic section flags to better document how they
3338 are used here. */
3339 #define has_toc_reloc has_gp_reloc
3340 #define makes_toc_func_call need_finalize_relax
3341 #define call_check_in_progress reloc_done
3342
3343 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3344
3345 #define ppc_hash_table(p) \
3346 ((struct ppc_link_hash_table *) ((p)->hash))
3347
3348 #define ppc_stub_hash_lookup(table, string, create, copy) \
3349 ((struct ppc_stub_hash_entry *) \
3350 bfd_hash_lookup ((table), (string), (create), (copy)))
3351
3352 #define ppc_branch_hash_lookup(table, string, create, copy) \
3353 ((struct ppc_branch_hash_entry *) \
3354 bfd_hash_lookup ((table), (string), (create), (copy)))
3355
3356 /* Create an entry in the stub hash table. */
3357
3358 static struct bfd_hash_entry *
3359 stub_hash_newfunc (struct bfd_hash_entry *entry,
3360 struct bfd_hash_table *table,
3361 const char *string)
3362 {
3363 /* Allocate the structure if it has not already been allocated by a
3364 subclass. */
3365 if (entry == NULL)
3366 {
3367 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3368 if (entry == NULL)
3369 return entry;
3370 }
3371
3372 /* Call the allocation method of the superclass. */
3373 entry = bfd_hash_newfunc (entry, table, string);
3374 if (entry != NULL)
3375 {
3376 struct ppc_stub_hash_entry *eh;
3377
3378 /* Initialize the local fields. */
3379 eh = (struct ppc_stub_hash_entry *) entry;
3380 eh->stub_type = ppc_stub_none;
3381 eh->stub_sec = NULL;
3382 eh->stub_offset = 0;
3383 eh->target_value = 0;
3384 eh->target_section = NULL;
3385 eh->h = NULL;
3386 eh->id_sec = NULL;
3387 }
3388
3389 return entry;
3390 }
3391
3392 /* Create an entry in the branch hash table. */
3393
3394 static struct bfd_hash_entry *
3395 branch_hash_newfunc (struct bfd_hash_entry *entry,
3396 struct bfd_hash_table *table,
3397 const char *string)
3398 {
3399 /* Allocate the structure if it has not already been allocated by a
3400 subclass. */
3401 if (entry == NULL)
3402 {
3403 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3404 if (entry == NULL)
3405 return entry;
3406 }
3407
3408 /* Call the allocation method of the superclass. */
3409 entry = bfd_hash_newfunc (entry, table, string);
3410 if (entry != NULL)
3411 {
3412 struct ppc_branch_hash_entry *eh;
3413
3414 /* Initialize the local fields. */
3415 eh = (struct ppc_branch_hash_entry *) entry;
3416 eh->offset = 0;
3417 eh->iter = 0;
3418 }
3419
3420 return entry;
3421 }
3422
3423 /* Create an entry in a ppc64 ELF linker hash table. */
3424
3425 static struct bfd_hash_entry *
3426 link_hash_newfunc (struct bfd_hash_entry *entry,
3427 struct bfd_hash_table *table,
3428 const char *string)
3429 {
3430 /* Allocate the structure if it has not already been allocated by a
3431 subclass. */
3432 if (entry == NULL)
3433 {
3434 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3435 if (entry == NULL)
3436 return entry;
3437 }
3438
3439 /* Call the allocation method of the superclass. */
3440 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3441 if (entry != NULL)
3442 {
3443 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3444
3445 memset (&eh->stub_cache, 0,
3446 (sizeof (struct ppc_link_hash_entry)
3447 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3448 }
3449
3450 return entry;
3451 }
3452
3453 /* Create a ppc64 ELF linker hash table. */
3454
3455 static struct bfd_link_hash_table *
3456 ppc64_elf_link_hash_table_create (bfd *abfd)
3457 {
3458 struct ppc_link_hash_table *htab;
3459 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3460
3461 htab = bfd_zmalloc (amt);
3462 if (htab == NULL)
3463 return NULL;
3464
3465 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3466 {
3467 free (htab);
3468 return NULL;
3469 }
3470
3471 /* Init the stub hash table too. */
3472 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3473 return NULL;
3474
3475 /* And the branch hash table. */
3476 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3477 return NULL;
3478
3479 /* Initializing two fields of the union is just cosmetic. We really
3480 only care about glist, but when compiled on a 32-bit host the
3481 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3482 debugger inspection of these fields look nicer. */
3483 htab->elf.init_got_refcount.refcount = 0;
3484 htab->elf.init_got_refcount.glist = NULL;
3485 htab->elf.init_plt_refcount.refcount = 0;
3486 htab->elf.init_plt_refcount.glist = NULL;
3487 htab->elf.init_got_offset.offset = 0;
3488 htab->elf.init_got_offset.glist = NULL;
3489 htab->elf.init_plt_offset.offset = 0;
3490 htab->elf.init_plt_offset.glist = NULL;
3491
3492 return &htab->elf.root;
3493 }
3494
3495 /* Free the derived linker hash table. */
3496
3497 static void
3498 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3499 {
3500 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3501
3502 bfd_hash_table_free (&ret->stub_hash_table);
3503 bfd_hash_table_free (&ret->branch_hash_table);
3504 _bfd_generic_link_hash_table_free (hash);
3505 }
3506
3507 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3508
3509 void
3510 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3511 {
3512 struct ppc_link_hash_table *htab;
3513
3514 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3515
3516 /* Always hook our dynamic sections into the first bfd, which is the
3517 linker created stub bfd. This ensures that the GOT header is at
3518 the start of the output TOC section. */
3519 htab = ppc_hash_table (info);
3520 htab->stub_bfd = abfd;
3521 htab->elf.dynobj = abfd;
3522 }
3523
3524 /* Build a name for an entry in the stub hash table. */
3525
3526 static char *
3527 ppc_stub_name (const asection *input_section,
3528 const asection *sym_sec,
3529 const struct ppc_link_hash_entry *h,
3530 const Elf_Internal_Rela *rel)
3531 {
3532 char *stub_name;
3533 bfd_size_type len;
3534
3535 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3536 offsets from a sym as a branch target? In fact, we could
3537 probably assume the addend is always zero. */
3538 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3539
3540 if (h)
3541 {
3542 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3543 stub_name = bfd_malloc (len);
3544 if (stub_name == NULL)
3545 return stub_name;
3546
3547 sprintf (stub_name, "%08x.%s+%x",
3548 input_section->id & 0xffffffff,
3549 h->elf.root.root.string,
3550 (int) rel->r_addend & 0xffffffff);
3551 }
3552 else
3553 {
3554 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3555 stub_name = bfd_malloc (len);
3556 if (stub_name == NULL)
3557 return stub_name;
3558
3559 sprintf (stub_name, "%08x.%x:%x+%x",
3560 input_section->id & 0xffffffff,
3561 sym_sec->id & 0xffffffff,
3562 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3563 (int) rel->r_addend & 0xffffffff);
3564 }
3565 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3566 stub_name[len - 2] = 0;
3567 return stub_name;
3568 }
3569
3570 /* Look up an entry in the stub hash. Stub entries are cached because
3571 creating the stub name takes a bit of time. */
3572
3573 static struct ppc_stub_hash_entry *
3574 ppc_get_stub_entry (const asection *input_section,
3575 const asection *sym_sec,
3576 struct ppc_link_hash_entry *h,
3577 const Elf_Internal_Rela *rel,
3578 struct ppc_link_hash_table *htab)
3579 {
3580 struct ppc_stub_hash_entry *stub_entry;
3581 const asection *id_sec;
3582
3583 /* If this input section is part of a group of sections sharing one
3584 stub section, then use the id of the first section in the group.
3585 Stub names need to include a section id, as there may well be
3586 more than one stub used to reach say, printf, and we need to
3587 distinguish between them. */
3588 id_sec = htab->stub_group[input_section->id].link_sec;
3589
3590 if (h != NULL && h->stub_cache != NULL
3591 && h->stub_cache->h == h
3592 && h->stub_cache->id_sec == id_sec)
3593 {
3594 stub_entry = h->stub_cache;
3595 }
3596 else
3597 {
3598 char *stub_name;
3599
3600 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3601 if (stub_name == NULL)
3602 return NULL;
3603
3604 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3605 stub_name, FALSE, FALSE);
3606 if (h != NULL)
3607 h->stub_cache = stub_entry;
3608
3609 free (stub_name);
3610 }
3611
3612 return stub_entry;
3613 }
3614
3615 /* Add a new stub entry to the stub hash. Not all fields of the new
3616 stub entry are initialised. */
3617
3618 static struct ppc_stub_hash_entry *
3619 ppc_add_stub (const char *stub_name,
3620 asection *section,
3621 struct ppc_link_hash_table *htab)
3622 {
3623 asection *link_sec;
3624 asection *stub_sec;
3625 struct ppc_stub_hash_entry *stub_entry;
3626
3627 link_sec = htab->stub_group[section->id].link_sec;
3628 stub_sec = htab->stub_group[section->id].stub_sec;
3629 if (stub_sec == NULL)
3630 {
3631 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3632 if (stub_sec == NULL)
3633 {
3634 size_t namelen;
3635 bfd_size_type len;
3636 char *s_name;
3637
3638 namelen = strlen (link_sec->name);
3639 len = namelen + sizeof (STUB_SUFFIX);
3640 s_name = bfd_alloc (htab->stub_bfd, len);
3641 if (s_name == NULL)
3642 return NULL;
3643
3644 memcpy (s_name, link_sec->name, namelen);
3645 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3646 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3647 if (stub_sec == NULL)
3648 return NULL;
3649 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3650 }
3651 htab->stub_group[section->id].stub_sec = stub_sec;
3652 }
3653
3654 /* Enter this entry into the linker stub hash table. */
3655 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3656 TRUE, FALSE);
3657 if (stub_entry == NULL)
3658 {
3659 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3660 section->owner, stub_name);
3661 return NULL;
3662 }
3663
3664 stub_entry->stub_sec = stub_sec;
3665 stub_entry->stub_offset = 0;
3666 stub_entry->id_sec = link_sec;
3667 return stub_entry;
3668 }
3669
3670 /* Create sections for linker generated code. */
3671
3672 static bfd_boolean
3673 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3674 {
3675 struct ppc_link_hash_table *htab;
3676 flagword flags;
3677
3678 htab = ppc_hash_table (info);
3679
3680 /* Create .sfpr for code to save and restore fp regs. */
3681 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3682 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3683 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3684 flags);
3685 if (htab->sfpr == NULL
3686 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3687 return FALSE;
3688
3689 /* Create .glink for lazy dynamic linking support. */
3690 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3691 flags);
3692 if (htab->glink == NULL
3693 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3694 return FALSE;
3695
3696 /* Create branch lookup table for plt_branch stubs. */
3697 if (info->shared)
3698 {
3699 flags = (SEC_ALLOC | SEC_LOAD
3700 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3701 htab->brlt
3702 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3703 flags);
3704 }
3705 else
3706 {
3707 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3708 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3709 htab->brlt
3710 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3711 }
3712
3713 if (htab->brlt == NULL
3714 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3715 return FALSE;
3716
3717 if (info->shared)
3718 {
3719 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3720 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3721 htab->relbrlt
3722 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3723 flags);
3724 }
3725 else if (info->emitrelocations)
3726 {
3727 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3728 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3729 htab->relbrlt
3730 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3731 flags);
3732 }
3733 else
3734 return TRUE;
3735
3736 if (!htab->relbrlt
3737 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3738 return FALSE;
3739
3740 return TRUE;
3741 }
3742
3743 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3744 not already done. */
3745
3746 static bfd_boolean
3747 create_got_section (bfd *abfd, struct bfd_link_info *info)
3748 {
3749 asection *got, *relgot;
3750 flagword flags;
3751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3752
3753 if (!htab->got)
3754 {
3755 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3756 return FALSE;
3757
3758 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3759 if (!htab->got)
3760 abort ();
3761 }
3762
3763 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3764 | SEC_LINKER_CREATED);
3765
3766 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3767 if (!got
3768 || !bfd_set_section_alignment (abfd, got, 3))
3769 return FALSE;
3770
3771 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3772 flags | SEC_READONLY);
3773 if (!relgot
3774 || ! bfd_set_section_alignment (abfd, relgot, 3))
3775 return FALSE;
3776
3777 ppc64_elf_tdata (abfd)->got = got;
3778 ppc64_elf_tdata (abfd)->relgot = relgot;
3779 return TRUE;
3780 }
3781
3782 /* Create the dynamic sections, and set up shortcuts. */
3783
3784 static bfd_boolean
3785 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3786 {
3787 struct ppc_link_hash_table *htab;
3788
3789 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3790 return FALSE;
3791
3792 htab = ppc_hash_table (info);
3793 if (!htab->got)
3794 htab->got = bfd_get_section_by_name (dynobj, ".got");
3795 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3796 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3797 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3798 if (!info->shared)
3799 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3800
3801 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3802 || (!info->shared && !htab->relbss))
3803 abort ();
3804
3805 return TRUE;
3806 }
3807
3808 /* Merge PLT info on FROM with that on TO. */
3809
3810 static void
3811 move_plt_plist (struct ppc_link_hash_entry *from,
3812 struct ppc_link_hash_entry *to)
3813 {
3814 if (from->elf.plt.plist != NULL)
3815 {
3816 if (to->elf.plt.plist != NULL)
3817 {
3818 struct plt_entry **entp;
3819 struct plt_entry *ent;
3820
3821 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3822 {
3823 struct plt_entry *dent;
3824
3825 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3826 if (dent->addend == ent->addend)
3827 {
3828 dent->plt.refcount += ent->plt.refcount;
3829 *entp = ent->next;
3830 break;
3831 }
3832 if (dent == NULL)
3833 entp = &ent->next;
3834 }
3835 *entp = to->elf.plt.plist;
3836 }
3837
3838 to->elf.plt.plist = from->elf.plt.plist;
3839 from->elf.plt.plist = NULL;
3840 }
3841 }
3842
3843 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3844
3845 static void
3846 ppc64_elf_copy_indirect_symbol
3847 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3848 struct elf_link_hash_entry *dir,
3849 struct elf_link_hash_entry *ind)
3850 {
3851 struct ppc_link_hash_entry *edir, *eind;
3852
3853 edir = (struct ppc_link_hash_entry *) dir;
3854 eind = (struct ppc_link_hash_entry *) ind;
3855
3856 /* Copy over any dynamic relocs we may have on the indirect sym. */
3857 if (eind->dyn_relocs != NULL)
3858 {
3859 if (edir->dyn_relocs != NULL)
3860 {
3861 struct ppc_dyn_relocs **pp;
3862 struct ppc_dyn_relocs *p;
3863
3864 if (eind->elf.root.type == bfd_link_hash_indirect)
3865 abort ();
3866
3867 /* Add reloc counts against the weak sym to the strong sym
3868 list. Merge any entries against the same section. */
3869 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3870 {
3871 struct ppc_dyn_relocs *q;
3872
3873 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3874 if (q->sec == p->sec)
3875 {
3876 q->pc_count += p->pc_count;
3877 q->count += p->count;
3878 *pp = p->next;
3879 break;
3880 }
3881 if (q == NULL)
3882 pp = &p->next;
3883 }
3884 *pp = edir->dyn_relocs;
3885 }
3886
3887 edir->dyn_relocs = eind->dyn_relocs;
3888 eind->dyn_relocs = NULL;
3889 }
3890
3891 edir->is_func |= eind->is_func;
3892 edir->is_func_descriptor |= eind->is_func_descriptor;
3893 edir->tls_mask |= eind->tls_mask;
3894
3895 /* If called to transfer flags for a weakdef during processing
3896 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3897 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3898 if (!(ELIMINATE_COPY_RELOCS
3899 && eind->elf.root.type != bfd_link_hash_indirect
3900 && edir->elf.dynamic_adjusted))
3901 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3902
3903 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3904 edir->elf.ref_regular |= eind->elf.ref_regular;
3905 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3906 edir->elf.needs_plt |= eind->elf.needs_plt;
3907
3908 /* If we were called to copy over info for a weak sym, that's all. */
3909 if (eind->elf.root.type != bfd_link_hash_indirect)
3910 return;
3911
3912 /* Copy over got entries that we may have already seen to the
3913 symbol which just became indirect. */
3914 if (eind->elf.got.glist != NULL)
3915 {
3916 if (edir->elf.got.glist != NULL)
3917 {
3918 struct got_entry **entp;
3919 struct got_entry *ent;
3920
3921 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3922 {
3923 struct got_entry *dent;
3924
3925 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3926 if (dent->addend == ent->addend
3927 && dent->owner == ent->owner
3928 && dent->tls_type == ent->tls_type)
3929 {
3930 dent->got.refcount += ent->got.refcount;
3931 *entp = ent->next;
3932 break;
3933 }
3934 if (dent == NULL)
3935 entp = &ent->next;
3936 }
3937 *entp = edir->elf.got.glist;
3938 }
3939
3940 edir->elf.got.glist = eind->elf.got.glist;
3941 eind->elf.got.glist = NULL;
3942 }
3943
3944 /* And plt entries. */
3945 move_plt_plist (eind, edir);
3946
3947 if (edir->elf.dynindx == -1)
3948 {
3949 edir->elf.dynindx = eind->elf.dynindx;
3950 edir->elf.dynstr_index = eind->elf.dynstr_index;
3951 eind->elf.dynindx = -1;
3952 eind->elf.dynstr_index = 0;
3953 }
3954 else
3955 BFD_ASSERT (eind->elf.dynindx == -1);
3956 }
3957
3958 /* Find the function descriptor hash entry from the given function code
3959 hash entry FH. Link the entries via their OH fields. */
3960
3961 static struct ppc_link_hash_entry *
3962 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3963 {
3964 struct ppc_link_hash_entry *fdh = fh->oh;
3965
3966 if (fdh == NULL)
3967 {
3968 const char *fd_name = fh->elf.root.root.string + 1;
3969
3970 fdh = (struct ppc_link_hash_entry *)
3971 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3972 if (fdh != NULL)
3973 {
3974 fdh->is_func_descriptor = 1;
3975 fdh->oh = fh;
3976 fh->is_func = 1;
3977 fh->oh = fdh;
3978 }
3979 }
3980
3981 return fdh;
3982 }
3983
3984 /* Make a fake function descriptor sym for the code sym FH. */
3985
3986 static struct ppc_link_hash_entry *
3987 make_fdh (struct bfd_link_info *info,
3988 struct ppc_link_hash_entry *fh)
3989 {
3990 bfd *abfd;
3991 asymbol *newsym;
3992 struct bfd_link_hash_entry *bh;
3993 struct ppc_link_hash_entry *fdh;
3994
3995 abfd = fh->elf.root.u.undef.abfd;
3996 newsym = bfd_make_empty_symbol (abfd);
3997 newsym->name = fh->elf.root.root.string + 1;
3998 newsym->section = bfd_und_section_ptr;
3999 newsym->value = 0;
4000 newsym->flags = BSF_WEAK;
4001
4002 bh = NULL;
4003 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4004 newsym->flags, newsym->section,
4005 newsym->value, NULL, FALSE, FALSE,
4006 &bh))
4007 return NULL;
4008
4009 fdh = (struct ppc_link_hash_entry *) bh;
4010 fdh->elf.non_elf = 0;
4011 fdh->fake = 1;
4012 fdh->is_func_descriptor = 1;
4013 fdh->oh = fh;
4014 fh->is_func = 1;
4015 fh->oh = fdh;
4016 return fdh;
4017 }
4018
4019 /* Hacks to support old ABI code.
4020 When making function calls, old ABI code references function entry
4021 points (dot symbols), while new ABI code references the function
4022 descriptor symbol. We need to make any combination of reference and
4023 definition work together, without breaking archive linking.
4024
4025 For a defined function "foo" and an undefined call to "bar":
4026 An old object defines "foo" and ".foo", references ".bar" (possibly
4027 "bar" too).
4028 A new object defines "foo" and references "bar".
4029
4030 A new object thus has no problem with its undefined symbols being
4031 satisfied by definitions in an old object. On the other hand, the
4032 old object won't have ".bar" satisfied by a new object. */
4033
4034 /* Fix function descriptor symbols defined in .opd sections to be
4035 function type. */
4036
4037 static bfd_boolean
4038 ppc64_elf_add_symbol_hook (bfd *ibfd,
4039 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4040 Elf_Internal_Sym *isym,
4041 const char **name,
4042 flagword *flags ATTRIBUTE_UNUSED,
4043 asection **sec,
4044 bfd_vma *value ATTRIBUTE_UNUSED)
4045 {
4046 if (*sec != NULL
4047 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4048 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4049
4050 if ((*name)[0] == '.'
4051 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4052 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4053 && is_ppc64_elf_target (ibfd->xvec))
4054 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4055
4056 return TRUE;
4057 }
4058
4059 /* This function makes an old ABI object reference to ".bar" cause the
4060 inclusion of a new ABI object archive that defines "bar".
4061 NAME is a symbol defined in an archive. Return a symbol in the hash
4062 table that might be satisfied by the archive symbols. */
4063
4064 static struct elf_link_hash_entry *
4065 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4066 struct bfd_link_info *info,
4067 const char *name)
4068 {
4069 struct elf_link_hash_entry *h;
4070 char *dot_name;
4071 size_t len;
4072
4073 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4074 if (h != NULL
4075 /* Don't return this sym if it is a fake function descriptor
4076 created by add_symbol_adjust. */
4077 && !(h->root.type == bfd_link_hash_undefweak
4078 && ((struct ppc_link_hash_entry *) h)->fake))
4079 return h;
4080
4081 if (name[0] == '.')
4082 return h;
4083
4084 len = strlen (name);
4085 dot_name = bfd_alloc (abfd, len + 2);
4086 if (dot_name == NULL)
4087 return (struct elf_link_hash_entry *) 0 - 1;
4088 dot_name[0] = '.';
4089 memcpy (dot_name + 1, name, len + 1);
4090 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4091 bfd_release (abfd, dot_name);
4092 return h;
4093 }
4094
4095 /* This function satisfies all old ABI object references to ".bar" if a
4096 new ABI object defines "bar". Well, at least, undefined dot symbols
4097 are made weak. This stops later archive searches from including an
4098 object if we already have a function descriptor definition. It also
4099 prevents the linker complaining about undefined symbols.
4100 We also check and correct mismatched symbol visibility here. The
4101 most restrictive visibility of the function descriptor and the
4102 function entry symbol is used. */
4103
4104 struct add_symbol_adjust_data
4105 {
4106 struct bfd_link_info *info;
4107 bfd_boolean ok;
4108 };
4109
4110 static bfd_boolean
4111 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4112 {
4113 struct add_symbol_adjust_data *data;
4114 struct ppc_link_hash_table *htab;
4115 struct ppc_link_hash_entry *eh;
4116 struct ppc_link_hash_entry *fdh;
4117
4118 if (h->root.type == bfd_link_hash_indirect)
4119 return TRUE;
4120
4121 if (h->root.type == bfd_link_hash_warning)
4122 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4123
4124 if (h->root.root.string[0] != '.')
4125 return TRUE;
4126
4127 data = inf;
4128 htab = ppc_hash_table (data->info);
4129 eh = (struct ppc_link_hash_entry *) h;
4130 fdh = get_fdh (eh, htab);
4131 if (fdh == NULL
4132 && !data->info->relocatable
4133 && (eh->elf.root.type == bfd_link_hash_undefined
4134 || eh->elf.root.type == bfd_link_hash_undefweak)
4135 && eh->elf.ref_regular)
4136 {
4137 /* Make an undefweak function descriptor sym, which is enough to
4138 pull in an --as-needed shared lib, but won't cause link
4139 errors. Archives are handled elsewhere. */
4140 fdh = make_fdh (data->info, eh);
4141 if (fdh == NULL)
4142 data->ok = FALSE;
4143 else
4144 fdh->elf.ref_regular = 1;
4145 }
4146 else if (fdh != NULL)
4147 {
4148 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4149 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4150 if (entry_vis < descr_vis)
4151 fdh->elf.other += entry_vis - descr_vis;
4152 else if (entry_vis > descr_vis)
4153 eh->elf.other += descr_vis - entry_vis;
4154
4155 if ((fdh->elf.root.type == bfd_link_hash_defined
4156 || fdh->elf.root.type == bfd_link_hash_defweak)
4157 && eh->elf.root.type == bfd_link_hash_undefined)
4158 {
4159 eh->elf.root.type = bfd_link_hash_undefweak;
4160 eh->was_undefined = 1;
4161 htab->twiddled_syms = 1;
4162 }
4163 }
4164
4165 return TRUE;
4166 }
4167
4168 static bfd_boolean
4169 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4170 {
4171 struct ppc_link_hash_table *htab;
4172 struct add_symbol_adjust_data data;
4173
4174 if (!is_ppc64_elf_target (abfd->xvec))
4175 return TRUE;
4176
4177 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4178 return TRUE;
4179 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4180
4181 htab = ppc_hash_table (info);
4182 if (!is_ppc64_elf_target (htab->elf.root.creator))
4183 return TRUE;
4184
4185 data.info = info;
4186 data.ok = TRUE;
4187 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4188
4189 /* We need to fix the undefs list for any syms we have twiddled to
4190 undef_weak. */
4191 if (htab->twiddled_syms)
4192 {
4193 bfd_link_repair_undef_list (&htab->elf.root);
4194 htab->twiddled_syms = 0;
4195 }
4196 return data.ok;
4197 }
4198
4199 static bfd_boolean
4200 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4201 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4202 {
4203 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4204 char *local_got_tls_masks;
4205
4206 if (local_got_ents == NULL)
4207 {
4208 bfd_size_type size = symtab_hdr->sh_info;
4209
4210 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4211 local_got_ents = bfd_zalloc (abfd, size);
4212 if (local_got_ents == NULL)
4213 return FALSE;
4214 elf_local_got_ents (abfd) = local_got_ents;
4215 }
4216
4217 if ((tls_type & TLS_EXPLICIT) == 0)
4218 {
4219 struct got_entry *ent;
4220
4221 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4222 if (ent->addend == r_addend
4223 && ent->owner == abfd
4224 && ent->tls_type == tls_type)
4225 break;
4226 if (ent == NULL)
4227 {
4228 bfd_size_type amt = sizeof (*ent);
4229 ent = bfd_alloc (abfd, amt);
4230 if (ent == NULL)
4231 return FALSE;
4232 ent->next = local_got_ents[r_symndx];
4233 ent->addend = r_addend;
4234 ent->owner = abfd;
4235 ent->tls_type = tls_type;
4236 ent->got.refcount = 0;
4237 local_got_ents[r_symndx] = ent;
4238 }
4239 ent->got.refcount += 1;
4240 }
4241
4242 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4243 local_got_tls_masks[r_symndx] |= tls_type;
4244 return TRUE;
4245 }
4246
4247 static bfd_boolean
4248 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4249 {
4250 struct plt_entry *ent;
4251
4252 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4253 if (ent->addend == addend)
4254 break;
4255 if (ent == NULL)
4256 {
4257 bfd_size_type amt = sizeof (*ent);
4258 ent = bfd_alloc (abfd, amt);
4259 if (ent == NULL)
4260 return FALSE;
4261 ent->next = eh->elf.plt.plist;
4262 ent->addend = addend;
4263 ent->plt.refcount = 0;
4264 eh->elf.plt.plist = ent;
4265 }
4266 ent->plt.refcount += 1;
4267 eh->elf.needs_plt = 1;
4268 if (eh->elf.root.root.string[0] == '.'
4269 && eh->elf.root.root.string[1] != '\0')
4270 eh->is_func = 1;
4271 return TRUE;
4272 }
4273
4274 /* Look through the relocs for a section during the first phase, and
4275 calculate needed space in the global offset table, procedure
4276 linkage table, and dynamic reloc sections. */
4277
4278 static bfd_boolean
4279 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4280 asection *sec, const Elf_Internal_Rela *relocs)
4281 {
4282 struct ppc_link_hash_table *htab;
4283 Elf_Internal_Shdr *symtab_hdr;
4284 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4285 const Elf_Internal_Rela *rel;
4286 const Elf_Internal_Rela *rel_end;
4287 asection *sreloc;
4288 asection **opd_sym_map;
4289
4290 if (info->relocatable)
4291 return TRUE;
4292
4293 /* Don't do anything special with non-loaded, non-alloced sections.
4294 In particular, any relocs in such sections should not affect GOT
4295 and PLT reference counting (ie. we don't allow them to create GOT
4296 or PLT entries), there's no possibility or desire to optimize TLS
4297 relocs, and there's not much point in propagating relocs to shared
4298 libs that the dynamic linker won't relocate. */
4299 if ((sec->flags & SEC_ALLOC) == 0)
4300 return TRUE;
4301
4302 htab = ppc_hash_table (info);
4303 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4304
4305 sym_hashes = elf_sym_hashes (abfd);
4306 sym_hashes_end = (sym_hashes
4307 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4308 - symtab_hdr->sh_info);
4309
4310 sreloc = NULL;
4311 opd_sym_map = NULL;
4312 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4313 {
4314 /* Garbage collection needs some extra help with .opd sections.
4315 We don't want to necessarily keep everything referenced by
4316 relocs in .opd, as that would keep all functions. Instead,
4317 if we reference an .opd symbol (a function descriptor), we
4318 want to keep the function code symbol's section. This is
4319 easy for global symbols, but for local syms we need to keep
4320 information about the associated function section. Later, if
4321 edit_opd deletes entries, we'll use this array to adjust
4322 local syms in .opd. */
4323 union opd_info {
4324 asection *func_section;
4325 long entry_adjust;
4326 };
4327 bfd_size_type amt;
4328
4329 amt = sec->size * sizeof (union opd_info) / 8;
4330 opd_sym_map = bfd_zalloc (abfd, amt);
4331 if (opd_sym_map == NULL)
4332 return FALSE;
4333 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4334 }
4335
4336 if (htab->sfpr == NULL
4337 && !create_linkage_sections (htab->elf.dynobj, info))
4338 return FALSE;
4339
4340 rel_end = relocs + sec->reloc_count;
4341 for (rel = relocs; rel < rel_end; rel++)
4342 {
4343 unsigned long r_symndx;
4344 struct elf_link_hash_entry *h;
4345 enum elf_ppc64_reloc_type r_type;
4346 int tls_type = 0;
4347
4348 r_symndx = ELF64_R_SYM (rel->r_info);
4349 if (r_symndx < symtab_hdr->sh_info)
4350 h = NULL;
4351 else
4352 {
4353 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4354 while (h->root.type == bfd_link_hash_indirect
4355 || h->root.type == bfd_link_hash_warning)
4356 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4357 }
4358
4359 r_type = ELF64_R_TYPE (rel->r_info);
4360 switch (r_type)
4361 {
4362 case R_PPC64_GOT_TLSLD16:
4363 case R_PPC64_GOT_TLSLD16_LO:
4364 case R_PPC64_GOT_TLSLD16_HI:
4365 case R_PPC64_GOT_TLSLD16_HA:
4366 ppc64_tlsld_got (abfd)->refcount += 1;
4367 tls_type = TLS_TLS | TLS_LD;
4368 goto dogottls;
4369
4370 case R_PPC64_GOT_TLSGD16:
4371 case R_PPC64_GOT_TLSGD16_LO:
4372 case R_PPC64_GOT_TLSGD16_HI:
4373 case R_PPC64_GOT_TLSGD16_HA:
4374 tls_type = TLS_TLS | TLS_GD;
4375 goto dogottls;
4376
4377 case R_PPC64_GOT_TPREL16_DS:
4378 case R_PPC64_GOT_TPREL16_LO_DS:
4379 case R_PPC64_GOT_TPREL16_HI:
4380 case R_PPC64_GOT_TPREL16_HA:
4381 if (info->shared)
4382 info->flags |= DF_STATIC_TLS;
4383 tls_type = TLS_TLS | TLS_TPREL;
4384 goto dogottls;
4385
4386 case R_PPC64_GOT_DTPREL16_DS:
4387 case R_PPC64_GOT_DTPREL16_LO_DS:
4388 case R_PPC64_GOT_DTPREL16_HI:
4389 case R_PPC64_GOT_DTPREL16_HA:
4390 tls_type = TLS_TLS | TLS_DTPREL;
4391 dogottls:
4392 sec->has_tls_reloc = 1;
4393 /* Fall thru */
4394
4395 case R_PPC64_GOT16:
4396 case R_PPC64_GOT16_DS:
4397 case R_PPC64_GOT16_HA:
4398 case R_PPC64_GOT16_HI:
4399 case R_PPC64_GOT16_LO:
4400 case R_PPC64_GOT16_LO_DS:
4401 /* This symbol requires a global offset table entry. */
4402 sec->has_toc_reloc = 1;
4403 if (ppc64_elf_tdata (abfd)->got == NULL
4404 && !create_got_section (abfd, info))
4405 return FALSE;
4406
4407 if (h != NULL)
4408 {
4409 struct ppc_link_hash_entry *eh;
4410 struct got_entry *ent;
4411
4412 eh = (struct ppc_link_hash_entry *) h;
4413 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4414 if (ent->addend == rel->r_addend
4415 && ent->owner == abfd
4416 && ent->tls_type == tls_type)
4417 break;
4418 if (ent == NULL)
4419 {
4420 bfd_size_type amt = sizeof (*ent);
4421 ent = bfd_alloc (abfd, amt);
4422 if (ent == NULL)
4423 return FALSE;
4424 ent->next = eh->elf.got.glist;
4425 ent->addend = rel->r_addend;
4426 ent->owner = abfd;
4427 ent->tls_type = tls_type;
4428 ent->got.refcount = 0;
4429 eh->elf.got.glist = ent;
4430 }
4431 ent->got.refcount += 1;
4432 eh->tls_mask |= tls_type;
4433 }
4434 else
4435 /* This is a global offset table entry for a local symbol. */
4436 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4437 rel->r_addend, tls_type))
4438 return FALSE;
4439 break;
4440
4441 case R_PPC64_PLT16_HA:
4442 case R_PPC64_PLT16_HI:
4443 case R_PPC64_PLT16_LO:
4444 case R_PPC64_PLT32:
4445 case R_PPC64_PLT64:
4446 /* This symbol requires a procedure linkage table entry. We
4447 actually build the entry in adjust_dynamic_symbol,
4448 because this might be a case of linking PIC code without
4449 linking in any dynamic objects, in which case we don't
4450 need to generate a procedure linkage table after all. */
4451 if (h == NULL)
4452 {
4453 /* It does not make sense to have a procedure linkage
4454 table entry for a local symbol. */
4455 bfd_set_error (bfd_error_bad_value);
4456 return FALSE;
4457 }
4458 else
4459 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4460 rel->r_addend))
4461 return FALSE;
4462 break;
4463
4464 /* The following relocations don't need to propagate the
4465 relocation if linking a shared object since they are
4466 section relative. */
4467 case R_PPC64_SECTOFF:
4468 case R_PPC64_SECTOFF_LO:
4469 case R_PPC64_SECTOFF_HI:
4470 case R_PPC64_SECTOFF_HA:
4471 case R_PPC64_SECTOFF_DS:
4472 case R_PPC64_SECTOFF_LO_DS:
4473 case R_PPC64_DTPREL16:
4474 case R_PPC64_DTPREL16_LO:
4475 case R_PPC64_DTPREL16_HI:
4476 case R_PPC64_DTPREL16_HA:
4477 case R_PPC64_DTPREL16_DS:
4478 case R_PPC64_DTPREL16_LO_DS:
4479 case R_PPC64_DTPREL16_HIGHER:
4480 case R_PPC64_DTPREL16_HIGHERA:
4481 case R_PPC64_DTPREL16_HIGHEST:
4482 case R_PPC64_DTPREL16_HIGHESTA:
4483 break;
4484
4485 /* Nor do these. */
4486 case R_PPC64_TOC16:
4487 case R_PPC64_TOC16_LO:
4488 case R_PPC64_TOC16_HI:
4489 case R_PPC64_TOC16_HA:
4490 case R_PPC64_TOC16_DS:
4491 case R_PPC64_TOC16_LO_DS:
4492 sec->has_toc_reloc = 1;
4493 break;
4494
4495 /* This relocation describes the C++ object vtable hierarchy.
4496 Reconstruct it for later use during GC. */
4497 case R_PPC64_GNU_VTINHERIT:
4498 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4499 return FALSE;
4500 break;
4501
4502 /* This relocation describes which C++ vtable entries are actually
4503 used. Record for later use during GC. */
4504 case R_PPC64_GNU_VTENTRY:
4505 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4506 return FALSE;
4507 break;
4508
4509 case R_PPC64_REL14:
4510 case R_PPC64_REL14_BRTAKEN:
4511 case R_PPC64_REL14_BRNTAKEN:
4512 htab->has_14bit_branch = 1;
4513 /* Fall through. */
4514
4515 case R_PPC64_REL24:
4516 if (h != NULL)
4517 {
4518 /* We may need a .plt entry if the function this reloc
4519 refers to is in a shared lib. */
4520 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4521 rel->r_addend))
4522 return FALSE;
4523 if (h == &htab->tls_get_addr->elf
4524 || h == &htab->tls_get_addr_fd->elf)
4525 sec->has_tls_reloc = 1;
4526 else if (htab->tls_get_addr == NULL
4527 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4528 && (h->root.root.string[15] == 0
4529 || h->root.root.string[15] == '@'))
4530 {
4531 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4532 sec->has_tls_reloc = 1;
4533 }
4534 else if (htab->tls_get_addr_fd == NULL
4535 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4536 && (h->root.root.string[14] == 0
4537 || h->root.root.string[14] == '@'))
4538 {
4539 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4540 sec->has_tls_reloc = 1;
4541 }
4542 }
4543 break;
4544
4545 case R_PPC64_TPREL64:
4546 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4547 if (info->shared)
4548 info->flags |= DF_STATIC_TLS;
4549 goto dotlstoc;
4550
4551 case R_PPC64_DTPMOD64:
4552 if (rel + 1 < rel_end
4553 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4554 && rel[1].r_offset == rel->r_offset + 8)
4555 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4556 else
4557 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4558 goto dotlstoc;
4559
4560 case R_PPC64_DTPREL64:
4561 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4562 if (rel != relocs
4563 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4564 && rel[-1].r_offset == rel->r_offset - 8)
4565 /* This is the second reloc of a dtpmod, dtprel pair.
4566 Don't mark with TLS_DTPREL. */
4567 goto dodyn;
4568
4569 dotlstoc:
4570 sec->has_tls_reloc = 1;
4571 if (h != NULL)
4572 {
4573 struct ppc_link_hash_entry *eh;
4574 eh = (struct ppc_link_hash_entry *) h;
4575 eh->tls_mask |= tls_type;
4576 }
4577 else
4578 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4579 rel->r_addend, tls_type))
4580 return FALSE;
4581
4582 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4583 {
4584 /* One extra to simplify get_tls_mask. */
4585 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4586 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4587 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4588 return FALSE;
4589 }
4590 BFD_ASSERT (rel->r_offset % 8 == 0);
4591 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4592
4593 /* Mark the second slot of a GD or LD entry.
4594 -1 to indicate GD and -2 to indicate LD. */
4595 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4596 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4597 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4598 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4599 goto dodyn;
4600
4601 case R_PPC64_TPREL16:
4602 case R_PPC64_TPREL16_LO:
4603 case R_PPC64_TPREL16_HI:
4604 case R_PPC64_TPREL16_HA:
4605 case R_PPC64_TPREL16_DS:
4606 case R_PPC64_TPREL16_LO_DS:
4607 case R_PPC64_TPREL16_HIGHER:
4608 case R_PPC64_TPREL16_HIGHERA:
4609 case R_PPC64_TPREL16_HIGHEST:
4610 case R_PPC64_TPREL16_HIGHESTA:
4611 if (info->shared)
4612 {
4613 info->flags |= DF_STATIC_TLS;
4614 goto dodyn;
4615 }
4616 break;
4617
4618 case R_PPC64_ADDR64:
4619 if (opd_sym_map != NULL
4620 && rel + 1 < rel_end
4621 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4622 {
4623 if (h != NULL)
4624 {
4625 if (h->root.root.string[0] == '.'
4626 && h->root.root.string[1] != 0
4627 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4628 ;
4629 else
4630 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4631 }
4632 else
4633 {
4634 asection *s;
4635
4636 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4637 r_symndx);
4638 if (s == NULL)
4639 return FALSE;
4640 else if (s != sec)
4641 opd_sym_map[rel->r_offset / 8] = s;
4642 }
4643 }
4644 /* Fall through. */
4645
4646 case R_PPC64_REL30:
4647 case R_PPC64_REL32:
4648 case R_PPC64_REL64:
4649 case R_PPC64_ADDR14:
4650 case R_PPC64_ADDR14_BRNTAKEN:
4651 case R_PPC64_ADDR14_BRTAKEN:
4652 case R_PPC64_ADDR16:
4653 case R_PPC64_ADDR16_DS:
4654 case R_PPC64_ADDR16_HA:
4655 case R_PPC64_ADDR16_HI:
4656 case R_PPC64_ADDR16_HIGHER:
4657 case R_PPC64_ADDR16_HIGHERA:
4658 case R_PPC64_ADDR16_HIGHEST:
4659 case R_PPC64_ADDR16_HIGHESTA:
4660 case R_PPC64_ADDR16_LO:
4661 case R_PPC64_ADDR16_LO_DS:
4662 case R_PPC64_ADDR24:
4663 case R_PPC64_ADDR32:
4664 case R_PPC64_UADDR16:
4665 case R_PPC64_UADDR32:
4666 case R_PPC64_UADDR64:
4667 case R_PPC64_TOC:
4668 if (h != NULL && !info->shared)
4669 /* We may need a copy reloc. */
4670 h->non_got_ref = 1;
4671
4672 /* Don't propagate .opd relocs. */
4673 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4674 break;
4675
4676 /* If we are creating a shared library, and this is a reloc
4677 against a global symbol, or a non PC relative reloc
4678 against a local symbol, then we need to copy the reloc
4679 into the shared library. However, if we are linking with
4680 -Bsymbolic, we do not need to copy a reloc against a
4681 global symbol which is defined in an object we are
4682 including in the link (i.e., DEF_REGULAR is set). At
4683 this point we have not seen all the input files, so it is
4684 possible that DEF_REGULAR is not set now but will be set
4685 later (it is never cleared). In case of a weak definition,
4686 DEF_REGULAR may be cleared later by a strong definition in
4687 a shared library. We account for that possibility below by
4688 storing information in the dyn_relocs field of the hash
4689 table entry. A similar situation occurs when creating
4690 shared libraries and symbol visibility changes render the
4691 symbol local.
4692
4693 If on the other hand, we are creating an executable, we
4694 may need to keep relocations for symbols satisfied by a
4695 dynamic library if we manage to avoid copy relocs for the
4696 symbol. */
4697 dodyn:
4698 if ((info->shared
4699 && (MUST_BE_DYN_RELOC (r_type)
4700 || (h != NULL
4701 && (! info->symbolic
4702 || h->root.type == bfd_link_hash_defweak
4703 || !h->def_regular))))
4704 || (ELIMINATE_COPY_RELOCS
4705 && !info->shared
4706 && h != NULL
4707 && (h->root.type == bfd_link_hash_defweak
4708 || !h->def_regular)))
4709 {
4710 struct ppc_dyn_relocs *p;
4711 struct ppc_dyn_relocs **head;
4712
4713 /* We must copy these reloc types into the output file.
4714 Create a reloc section in dynobj and make room for
4715 this reloc. */
4716 if (sreloc == NULL)
4717 {
4718 const char *name;
4719 bfd *dynobj;
4720
4721 name = (bfd_elf_string_from_elf_section
4722 (abfd,
4723 elf_elfheader (abfd)->e_shstrndx,
4724 elf_section_data (sec)->rel_hdr.sh_name));
4725 if (name == NULL)
4726 return FALSE;
4727
4728 if (strncmp (name, ".rela", 5) != 0
4729 || strcmp (bfd_get_section_name (abfd, sec),
4730 name + 5) != 0)
4731 {
4732 (*_bfd_error_handler)
4733 (_("%B: bad relocation section name `%s\'"),
4734 abfd, name);
4735 bfd_set_error (bfd_error_bad_value);
4736 }
4737
4738 dynobj = htab->elf.dynobj;
4739 sreloc = bfd_get_section_by_name (dynobj, name);
4740 if (sreloc == NULL)
4741 {
4742 flagword flags;
4743
4744 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4745 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4746 | SEC_ALLOC | SEC_LOAD);
4747 sreloc = bfd_make_section_with_flags (dynobj,
4748 name,
4749 flags);
4750 if (sreloc == NULL
4751 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4752 return FALSE;
4753 }
4754 elf_section_data (sec)->sreloc = sreloc;
4755 }
4756
4757 /* If this is a global symbol, we count the number of
4758 relocations we need for this symbol. */
4759 if (h != NULL)
4760 {
4761 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4762 }
4763 else
4764 {
4765 /* Track dynamic relocs needed for local syms too.
4766 We really need local syms available to do this
4767 easily. Oh well. */
4768
4769 asection *s;
4770 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4771 sec, r_symndx);
4772 if (s == NULL)
4773 return FALSE;
4774
4775 head = ((struct ppc_dyn_relocs **)
4776 &elf_section_data (s)->local_dynrel);
4777 }
4778
4779 p = *head;
4780 if (p == NULL || p->sec != sec)
4781 {
4782 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4783 if (p == NULL)
4784 return FALSE;
4785 p->next = *head;
4786 *head = p;
4787 p->sec = sec;
4788 p->count = 0;
4789 p->pc_count = 0;
4790 }
4791
4792 p->count += 1;
4793 if (!MUST_BE_DYN_RELOC (r_type))
4794 p->pc_count += 1;
4795 }
4796 break;
4797
4798 default:
4799 break;
4800 }
4801 }
4802
4803 return TRUE;
4804 }
4805
4806 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4807 of the code entry point, and its section. */
4808
4809 static bfd_vma
4810 opd_entry_value (asection *opd_sec,
4811 bfd_vma offset,
4812 asection **code_sec,
4813 bfd_vma *code_off)
4814 {
4815 bfd *opd_bfd = opd_sec->owner;
4816 Elf_Internal_Rela *relocs;
4817 Elf_Internal_Rela *lo, *hi, *look;
4818 bfd_vma val;
4819
4820 /* No relocs implies we are linking a --just-symbols object. */
4821 if (opd_sec->reloc_count == 0)
4822 {
4823 bfd_vma val;
4824
4825 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4826 return (bfd_vma) -1;
4827
4828 if (code_sec != NULL)
4829 {
4830 asection *sec, *likely = NULL;
4831 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4832 if (sec->vma <= val
4833 && (sec->flags & SEC_LOAD) != 0
4834 && (sec->flags & SEC_ALLOC) != 0)
4835 likely = sec;
4836 if (likely != NULL)
4837 {
4838 *code_sec = likely;
4839 if (code_off != NULL)
4840 *code_off = val - likely->vma;
4841 }
4842 }
4843 return val;
4844 }
4845
4846 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4847 if (relocs == NULL)
4848 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4849
4850 /* Go find the opd reloc at the sym address. */
4851 lo = relocs;
4852 BFD_ASSERT (lo != NULL);
4853 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4854 val = (bfd_vma) -1;
4855 while (lo < hi)
4856 {
4857 look = lo + (hi - lo) / 2;
4858 if (look->r_offset < offset)
4859 lo = look + 1;
4860 else if (look->r_offset > offset)
4861 hi = look;
4862 else
4863 {
4864 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4865 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4866 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4867 {
4868 unsigned long symndx = ELF64_R_SYM (look->r_info);
4869 asection *sec;
4870
4871 if (symndx < symtab_hdr->sh_info)
4872 {
4873 Elf_Internal_Sym *sym;
4874
4875 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4876 if (sym == NULL)
4877 {
4878 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4879 symtab_hdr->sh_info,
4880 0, NULL, NULL, NULL);
4881 if (sym == NULL)
4882 break;
4883 symtab_hdr->contents = (bfd_byte *) sym;
4884 }
4885
4886 sym += symndx;
4887 val = sym->st_value;
4888 sec = NULL;
4889 if ((sym->st_shndx != SHN_UNDEF
4890 && sym->st_shndx < SHN_LORESERVE)
4891 || sym->st_shndx > SHN_HIRESERVE)
4892 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4893 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4894 }
4895 else
4896 {
4897 struct elf_link_hash_entry **sym_hashes;
4898 struct elf_link_hash_entry *rh;
4899
4900 sym_hashes = elf_sym_hashes (opd_bfd);
4901 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4902 while (rh->root.type == bfd_link_hash_indirect
4903 || rh->root.type == bfd_link_hash_warning)
4904 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4905 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4906 || rh->root.type == bfd_link_hash_defweak);
4907 val = rh->root.u.def.value;
4908 sec = rh->root.u.def.section;
4909 }
4910 val += look->r_addend;
4911 if (code_off != NULL)
4912 *code_off = val;
4913 if (code_sec != NULL)
4914 *code_sec = sec;
4915 if (sec != NULL && sec->output_section != NULL)
4916 val += sec->output_section->vma + sec->output_offset;
4917 }
4918 break;
4919 }
4920 }
4921
4922 return val;
4923 }
4924
4925 /* Return the section that should be marked against GC for a given
4926 relocation. */
4927
4928 static asection *
4929 ppc64_elf_gc_mark_hook (asection *sec,
4930 struct bfd_link_info *info,
4931 Elf_Internal_Rela *rel,
4932 struct elf_link_hash_entry *h,
4933 Elf_Internal_Sym *sym)
4934 {
4935 asection *rsec;
4936
4937 /* First mark all our entry sym sections. */
4938 if (info->gc_sym_list != NULL)
4939 {
4940 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4941 struct bfd_sym_chain *sym = info->gc_sym_list;
4942
4943 info->gc_sym_list = NULL;
4944 do
4945 {
4946 struct ppc_link_hash_entry *eh;
4947
4948 eh = (struct ppc_link_hash_entry *)
4949 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4950 if (eh == NULL)
4951 continue;
4952 if (eh->elf.root.type != bfd_link_hash_defined
4953 && eh->elf.root.type != bfd_link_hash_defweak)
4954 continue;
4955
4956 if (eh->is_func_descriptor
4957 && (eh->oh->elf.root.type == bfd_link_hash_defined
4958 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4959 rsec = eh->oh->elf.root.u.def.section;
4960 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4961 && opd_entry_value (eh->elf.root.u.def.section,
4962 eh->elf.root.u.def.value,
4963 &rsec, NULL) != (bfd_vma) -1)
4964 ;
4965 else
4966 continue;
4967
4968 if (!rsec->gc_mark)
4969 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4970
4971 rsec = eh->elf.root.u.def.section;
4972 if (!rsec->gc_mark)
4973 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4974
4975 sym = sym->next;
4976 }
4977 while (sym != NULL);
4978 }
4979
4980 /* Syms return NULL if we're marking .opd, so we avoid marking all
4981 function sections, as all functions are referenced in .opd. */
4982 rsec = NULL;
4983 if (get_opd_info (sec) != NULL)
4984 return rsec;
4985
4986 if (h != NULL)
4987 {
4988 enum elf_ppc64_reloc_type r_type;
4989 struct ppc_link_hash_entry *eh;
4990
4991 r_type = ELF64_R_TYPE (rel->r_info);
4992 switch (r_type)
4993 {
4994 case R_PPC64_GNU_VTINHERIT:
4995 case R_PPC64_GNU_VTENTRY:
4996 break;
4997
4998 default:
4999 switch (h->root.type)
5000 {
5001 case bfd_link_hash_defined:
5002 case bfd_link_hash_defweak:
5003 eh = (struct ppc_link_hash_entry *) h;
5004 if (eh->oh != NULL
5005 && eh->oh->is_func_descriptor
5006 && (eh->oh->elf.root.type == bfd_link_hash_defined
5007 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5008 eh = eh->oh;
5009
5010 /* Function descriptor syms cause the associated
5011 function code sym section to be marked. */
5012 if (eh->is_func_descriptor
5013 && (eh->oh->elf.root.type == bfd_link_hash_defined
5014 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5015 {
5016 /* They also mark their opd section. */
5017 if (!eh->elf.root.u.def.section->gc_mark)
5018 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5019 ppc64_elf_gc_mark_hook);
5020
5021 rsec = eh->oh->elf.root.u.def.section;
5022 }
5023 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5024 && opd_entry_value (eh->elf.root.u.def.section,
5025 eh->elf.root.u.def.value,
5026 &rsec, NULL) != (bfd_vma) -1)
5027 {
5028 if (!eh->elf.root.u.def.section->gc_mark)
5029 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5030 ppc64_elf_gc_mark_hook);
5031 }
5032 else
5033 rsec = h->root.u.def.section;
5034 break;
5035
5036 case bfd_link_hash_common:
5037 rsec = h->root.u.c.p->section;
5038 break;
5039
5040 default:
5041 break;
5042 }
5043 }
5044 }
5045 else
5046 {
5047 asection **opd_sym_section;
5048
5049 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5050 opd_sym_section = get_opd_info (rsec);
5051 if (opd_sym_section != NULL)
5052 {
5053 if (!rsec->gc_mark)
5054 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5055
5056 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5057 }
5058 }
5059
5060 return rsec;
5061 }
5062
5063 /* Update the .got, .plt. and dynamic reloc reference counts for the
5064 section being removed. */
5065
5066 static bfd_boolean
5067 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5068 asection *sec, const Elf_Internal_Rela *relocs)
5069 {
5070 struct ppc_link_hash_table *htab;
5071 Elf_Internal_Shdr *symtab_hdr;
5072 struct elf_link_hash_entry **sym_hashes;
5073 struct got_entry **local_got_ents;
5074 const Elf_Internal_Rela *rel, *relend;
5075
5076 if ((sec->flags & SEC_ALLOC) == 0)
5077 return TRUE;
5078
5079 elf_section_data (sec)->local_dynrel = NULL;
5080
5081 htab = ppc_hash_table (info);
5082 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5083 sym_hashes = elf_sym_hashes (abfd);
5084 local_got_ents = elf_local_got_ents (abfd);
5085
5086 relend = relocs + sec->reloc_count;
5087 for (rel = relocs; rel < relend; rel++)
5088 {
5089 unsigned long r_symndx;
5090 enum elf_ppc64_reloc_type r_type;
5091 struct elf_link_hash_entry *h = NULL;
5092 char tls_type = 0;
5093
5094 r_symndx = ELF64_R_SYM (rel->r_info);
5095 r_type = ELF64_R_TYPE (rel->r_info);
5096 if (r_symndx >= symtab_hdr->sh_info)
5097 {
5098 struct ppc_link_hash_entry *eh;
5099 struct ppc_dyn_relocs **pp;
5100 struct ppc_dyn_relocs *p;
5101
5102 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5103 while (h->root.type == bfd_link_hash_indirect
5104 || h->root.type == bfd_link_hash_warning)
5105 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5106 eh = (struct ppc_link_hash_entry *) h;
5107
5108 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5109 if (p->sec == sec)
5110 {
5111 /* Everything must go for SEC. */
5112 *pp = p->next;
5113 break;
5114 }
5115 }
5116
5117 switch (r_type)
5118 {
5119 case R_PPC64_GOT_TLSLD16:
5120 case R_PPC64_GOT_TLSLD16_LO:
5121 case R_PPC64_GOT_TLSLD16_HI:
5122 case R_PPC64_GOT_TLSLD16_HA:
5123 ppc64_tlsld_got (abfd)->refcount -= 1;
5124 tls_type = TLS_TLS | TLS_LD;
5125 goto dogot;
5126
5127 case R_PPC64_GOT_TLSGD16:
5128 case R_PPC64_GOT_TLSGD16_LO:
5129 case R_PPC64_GOT_TLSGD16_HI:
5130 case R_PPC64_GOT_TLSGD16_HA:
5131 tls_type = TLS_TLS | TLS_GD;
5132 goto dogot;
5133
5134 case R_PPC64_GOT_TPREL16_DS:
5135 case R_PPC64_GOT_TPREL16_LO_DS:
5136 case R_PPC64_GOT_TPREL16_HI:
5137 case R_PPC64_GOT_TPREL16_HA:
5138 tls_type = TLS_TLS | TLS_TPREL;
5139 goto dogot;
5140
5141 case R_PPC64_GOT_DTPREL16_DS:
5142 case R_PPC64_GOT_DTPREL16_LO_DS:
5143 case R_PPC64_GOT_DTPREL16_HI:
5144 case R_PPC64_GOT_DTPREL16_HA:
5145 tls_type = TLS_TLS | TLS_DTPREL;
5146 goto dogot;
5147
5148 case R_PPC64_GOT16:
5149 case R_PPC64_GOT16_DS:
5150 case R_PPC64_GOT16_HA:
5151 case R_PPC64_GOT16_HI:
5152 case R_PPC64_GOT16_LO:
5153 case R_PPC64_GOT16_LO_DS:
5154 dogot:
5155 {
5156 struct got_entry *ent;
5157
5158 if (h != NULL)
5159 ent = h->got.glist;
5160 else
5161 ent = local_got_ents[r_symndx];
5162
5163 for (; ent != NULL; ent = ent->next)
5164 if (ent->addend == rel->r_addend
5165 && ent->owner == abfd
5166 && ent->tls_type == tls_type)
5167 break;
5168 if (ent == NULL)
5169 abort ();
5170 if (ent->got.refcount > 0)
5171 ent->got.refcount -= 1;
5172 }
5173 break;
5174
5175 case R_PPC64_PLT16_HA:
5176 case R_PPC64_PLT16_HI:
5177 case R_PPC64_PLT16_LO:
5178 case R_PPC64_PLT32:
5179 case R_PPC64_PLT64:
5180 case R_PPC64_REL14:
5181 case R_PPC64_REL14_BRNTAKEN:
5182 case R_PPC64_REL14_BRTAKEN:
5183 case R_PPC64_REL24:
5184 if (h != NULL)
5185 {
5186 struct plt_entry *ent;
5187
5188 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5189 if (ent->addend == rel->r_addend)
5190 break;
5191 if (ent == NULL)
5192 abort ();
5193 if (ent->plt.refcount > 0)
5194 ent->plt.refcount -= 1;
5195 }
5196 break;
5197
5198 default:
5199 break;
5200 }
5201 }
5202 return TRUE;
5203 }
5204
5205 /* The maximum size of .sfpr. */
5206 #define SFPR_MAX (218*4)
5207
5208 struct sfpr_def_parms
5209 {
5210 const char name[12];
5211 unsigned char lo, hi;
5212 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5213 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5214 };
5215
5216 /* Auto-generate _save*, _rest* functions in .sfpr. */
5217
5218 static unsigned int
5219 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5220 {
5221 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5222 unsigned int i;
5223 size_t len = strlen (parm->name);
5224 bfd_boolean writing = FALSE;
5225 char sym[16];
5226
5227 memcpy (sym, parm->name, len);
5228 sym[len + 2] = 0;
5229
5230 for (i = parm->lo; i <= parm->hi; i++)
5231 {
5232 struct elf_link_hash_entry *h;
5233
5234 sym[len + 0] = i / 10 + '0';
5235 sym[len + 1] = i % 10 + '0';
5236 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5237 if (h != NULL
5238 && !h->def_regular)
5239 {
5240 h->root.type = bfd_link_hash_defined;
5241 h->root.u.def.section = htab->sfpr;
5242 h->root.u.def.value = htab->sfpr->size;
5243 h->type = STT_FUNC;
5244 h->def_regular = 1;
5245 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5246 writing = TRUE;
5247 if (htab->sfpr->contents == NULL)
5248 {
5249 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5250 if (htab->sfpr->contents == NULL)
5251 return FALSE;
5252 }
5253 }
5254 if (writing)
5255 {
5256 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5257 if (i != parm->hi)
5258 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5259 else
5260 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5261 htab->sfpr->size = p - htab->sfpr->contents;
5262 }
5263 }
5264
5265 return TRUE;
5266 }
5267
5268 static bfd_byte *
5269 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5270 {
5271 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5272 return p + 4;
5273 }
5274
5275 static bfd_byte *
5276 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5277 {
5278 p = savegpr0 (abfd, p, r);
5279 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5280 p = p + 4;
5281 bfd_put_32 (abfd, BLR, p);
5282 return p + 4;
5283 }
5284
5285 static bfd_byte *
5286 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5287 {
5288 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5289 return p + 4;
5290 }
5291
5292 static bfd_byte *
5293 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5294 {
5295 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5296 p = p + 4;
5297 p = restgpr0 (abfd, p, r);
5298 bfd_put_32 (abfd, MTLR_R0, p);
5299 p = p + 4;
5300 if (r == 29)
5301 {
5302 p = restgpr0 (abfd, p, 30);
5303 p = restgpr0 (abfd, p, 31);
5304 }
5305 bfd_put_32 (abfd, BLR, p);
5306 return p + 4;
5307 }
5308
5309 static bfd_byte *
5310 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5311 {
5312 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5313 return p + 4;
5314 }
5315
5316 static bfd_byte *
5317 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5318 {
5319 p = savegpr1 (abfd, p, r);
5320 bfd_put_32 (abfd, BLR, p);
5321 return p + 4;
5322 }
5323
5324 static bfd_byte *
5325 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5326 {
5327 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5328 return p + 4;
5329 }
5330
5331 static bfd_byte *
5332 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5333 {
5334 p = restgpr1 (abfd, p, r);
5335 bfd_put_32 (abfd, BLR, p);
5336 return p + 4;
5337 }
5338
5339 static bfd_byte *
5340 savefpr (bfd *abfd, bfd_byte *p, int r)
5341 {
5342 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5343 return p + 4;
5344 }
5345
5346 static bfd_byte *
5347 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5348 {
5349 p = savefpr (abfd, p, r);
5350 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5351 p = p + 4;
5352 bfd_put_32 (abfd, BLR, p);
5353 return p + 4;
5354 }
5355
5356 static bfd_byte *
5357 restfpr (bfd *abfd, bfd_byte *p, int r)
5358 {
5359 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5360 return p + 4;
5361 }
5362
5363 static bfd_byte *
5364 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5365 {
5366 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5367 p = p + 4;
5368 p = restfpr (abfd, p, r);
5369 bfd_put_32 (abfd, MTLR_R0, p);
5370 p = p + 4;
5371 if (r == 29)
5372 {
5373 p = restfpr (abfd, p, 30);
5374 p = restfpr (abfd, p, 31);
5375 }
5376 bfd_put_32 (abfd, BLR, p);
5377 return p + 4;
5378 }
5379
5380 static bfd_byte *
5381 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5382 {
5383 p = savefpr (abfd, p, r);
5384 bfd_put_32 (abfd, BLR, p);
5385 return p + 4;
5386 }
5387
5388 static bfd_byte *
5389 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5390 {
5391 p = restfpr (abfd, p, r);
5392 bfd_put_32 (abfd, BLR, p);
5393 return p + 4;
5394 }
5395
5396 static bfd_byte *
5397 savevr (bfd *abfd, bfd_byte *p, int r)
5398 {
5399 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5400 p = p + 4;
5401 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5402 return p + 4;
5403 }
5404
5405 static bfd_byte *
5406 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5407 {
5408 p = savevr (abfd, p, r);
5409 bfd_put_32 (abfd, BLR, p);
5410 return p + 4;
5411 }
5412
5413 static bfd_byte *
5414 restvr (bfd *abfd, bfd_byte *p, int r)
5415 {
5416 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5417 p = p + 4;
5418 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5419 return p + 4;
5420 }
5421
5422 static bfd_byte *
5423 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5424 {
5425 p = restvr (abfd, p, r);
5426 bfd_put_32 (abfd, BLR, p);
5427 return p + 4;
5428 }
5429
5430 /* Called via elf_link_hash_traverse to transfer dynamic linking
5431 information on function code symbol entries to their corresponding
5432 function descriptor symbol entries. */
5433
5434 static bfd_boolean
5435 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5436 {
5437 struct bfd_link_info *info;
5438 struct ppc_link_hash_table *htab;
5439 struct plt_entry *ent;
5440 struct ppc_link_hash_entry *fh;
5441 struct ppc_link_hash_entry *fdh;
5442 bfd_boolean force_local;
5443
5444 fh = (struct ppc_link_hash_entry *) h;
5445 if (fh->elf.root.type == bfd_link_hash_indirect)
5446 return TRUE;
5447
5448 if (fh->elf.root.type == bfd_link_hash_warning)
5449 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5450
5451 info = inf;
5452 htab = ppc_hash_table (info);
5453
5454 /* Resolve undefined references to dot-symbols as the value
5455 in the function descriptor, if we have one in a regular object.
5456 This is to satisfy cases like ".quad .foo". Calls to functions
5457 in dynamic objects are handled elsewhere. */
5458 if (fh->elf.root.type == bfd_link_hash_undefweak
5459 && fh->was_undefined
5460 && (fh->oh->elf.root.type == bfd_link_hash_defined
5461 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5462 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5463 && opd_entry_value (fh->oh->elf.root.u.def.section,
5464 fh->oh->elf.root.u.def.value,
5465 &fh->elf.root.u.def.section,
5466 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5467 {
5468 fh->elf.root.type = fh->oh->elf.root.type;
5469 fh->elf.forced_local = 1;
5470 }
5471
5472 /* If this is a function code symbol, transfer dynamic linking
5473 information to the function descriptor symbol. */
5474 if (!fh->is_func)
5475 return TRUE;
5476
5477 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5478 if (ent->plt.refcount > 0)
5479 break;
5480 if (ent == NULL
5481 || fh->elf.root.root.string[0] != '.'
5482 || fh->elf.root.root.string[1] == '\0')
5483 return TRUE;
5484
5485 /* Find the corresponding function descriptor symbol. Create it
5486 as undefined if necessary. */
5487
5488 fdh = get_fdh (fh, htab);
5489 if (fdh != NULL)
5490 while (fdh->elf.root.type == bfd_link_hash_indirect
5491 || fdh->elf.root.type == bfd_link_hash_warning)
5492 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5493
5494 if (fdh == NULL
5495 && info->shared
5496 && (fh->elf.root.type == bfd_link_hash_undefined
5497 || fh->elf.root.type == bfd_link_hash_undefweak))
5498 {
5499 fdh = make_fdh (info, fh);
5500 if (fdh == NULL)
5501 return FALSE;
5502 }
5503
5504 /* Fake function descriptors are made undefweak. If the function
5505 code symbol is strong undefined, make the fake sym the same.
5506 If the function code symbol is defined, then force the fake
5507 descriptor local; We can't support overriding of symbols in a
5508 shared library on a fake descriptor. */
5509
5510 if (fdh != NULL
5511 && fdh->fake
5512 && fdh->elf.root.type == bfd_link_hash_undefweak)
5513 {
5514 if (fh->elf.root.type == bfd_link_hash_undefined)
5515 {
5516 fdh->elf.root.type = bfd_link_hash_undefined;
5517 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5518 }
5519 else if (fh->elf.root.type == bfd_link_hash_defined
5520 || fh->elf.root.type == bfd_link_hash_defweak)
5521 {
5522 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5523 }
5524 }
5525
5526 if (fdh != NULL
5527 && !fdh->elf.forced_local
5528 && (info->shared
5529 || fdh->elf.def_dynamic
5530 || fdh->elf.ref_dynamic
5531 || (fdh->elf.root.type == bfd_link_hash_undefweak
5532 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5533 {
5534 if (fdh->elf.dynindx == -1)
5535 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5536 return FALSE;
5537 fdh->elf.ref_regular |= fh->elf.ref_regular;
5538 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5539 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5540 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5541 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5542 {
5543 move_plt_plist (fh, fdh);
5544 fdh->elf.needs_plt = 1;
5545 }
5546 fdh->is_func_descriptor = 1;
5547 fdh->oh = fh;
5548 fh->oh = fdh;
5549 }
5550
5551 /* Now that the info is on the function descriptor, clear the
5552 function code sym info. Any function code syms for which we
5553 don't have a definition in a regular file, we force local.
5554 This prevents a shared library from exporting syms that have
5555 been imported from another library. Function code syms that
5556 are really in the library we must leave global to prevent the
5557 linker dragging in a definition from a static library. */
5558 force_local = (!fh->elf.def_regular
5559 || fdh == NULL
5560 || !fdh->elf.def_regular
5561 || fdh->elf.forced_local);
5562 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5563
5564 return TRUE;
5565 }
5566
5567 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5568 this hook to a) provide some gcc support functions, and b) transfer
5569 dynamic linking information gathered so far on function code symbol
5570 entries, to their corresponding function descriptor symbol entries. */
5571
5572 static bfd_boolean
5573 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5574 struct bfd_link_info *info)
5575 {
5576 struct ppc_link_hash_table *htab;
5577 unsigned int i;
5578 const struct sfpr_def_parms funcs[] =
5579 {
5580 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5581 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5582 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5583 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5584 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5585 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5586 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5587 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5588 { "._savef", 14, 31, savefpr, savefpr1_tail },
5589 { "._restf", 14, 31, restfpr, restfpr1_tail },
5590 { "_savevr_", 20, 31, savevr, savevr_tail },
5591 { "_restvr_", 20, 31, restvr, restvr_tail }
5592 };
5593
5594 htab = ppc_hash_table (info);
5595 if (htab->sfpr == NULL)
5596 /* We don't have any relocs. */
5597 return TRUE;
5598
5599 /* Provide any missing _save* and _rest* functions. */
5600 htab->sfpr->size = 0;
5601 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5602 if (!sfpr_define (info, &funcs[i]))
5603 return FALSE;
5604
5605 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5606
5607 if (htab->sfpr->size == 0)
5608 htab->sfpr->flags |= SEC_EXCLUDE;
5609
5610 return TRUE;
5611 }
5612
5613 /* Adjust a symbol defined by a dynamic object and referenced by a
5614 regular object. The current definition is in some section of the
5615 dynamic object, but we're not including those sections. We have to
5616 change the definition to something the rest of the link can
5617 understand. */
5618
5619 static bfd_boolean
5620 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5621 struct elf_link_hash_entry *h)
5622 {
5623 struct ppc_link_hash_table *htab;
5624 asection *s;
5625 unsigned int power_of_two;
5626
5627 htab = ppc_hash_table (info);
5628
5629 /* Deal with function syms. */
5630 if (h->type == STT_FUNC
5631 || h->needs_plt)
5632 {
5633 /* Clear procedure linkage table information for any symbol that
5634 won't need a .plt entry. */
5635 struct plt_entry *ent;
5636 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5637 if (ent->plt.refcount > 0)
5638 break;
5639 if (ent == NULL
5640 || SYMBOL_CALLS_LOCAL (info, h)
5641 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5642 && h->root.type == bfd_link_hash_undefweak))
5643 {
5644 h->plt.plist = NULL;
5645 h->needs_plt = 0;
5646 }
5647 }
5648 else
5649 h->plt.plist = NULL;
5650
5651 /* If this is a weak symbol, and there is a real definition, the
5652 processor independent code will have arranged for us to see the
5653 real definition first, and we can just use the same value. */
5654 if (h->u.weakdef != NULL)
5655 {
5656 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5657 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5658 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5659 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5660 if (ELIMINATE_COPY_RELOCS)
5661 h->non_got_ref = h->u.weakdef->non_got_ref;
5662 return TRUE;
5663 }
5664
5665 /* If we are creating a shared library, we must presume that the
5666 only references to the symbol are via the global offset table.
5667 For such cases we need not do anything here; the relocations will
5668 be handled correctly by relocate_section. */
5669 if (info->shared)
5670 return TRUE;
5671
5672 /* If there are no references to this symbol that do not use the
5673 GOT, we don't need to generate a copy reloc. */
5674 if (!h->non_got_ref)
5675 return TRUE;
5676
5677 if (ELIMINATE_COPY_RELOCS)
5678 {
5679 struct ppc_link_hash_entry * eh;
5680 struct ppc_dyn_relocs *p;
5681
5682 eh = (struct ppc_link_hash_entry *) h;
5683 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5684 {
5685 s = p->sec->output_section;
5686 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5687 break;
5688 }
5689
5690 /* If we didn't find any dynamic relocs in read-only sections, then
5691 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5692 if (p == NULL)
5693 {
5694 h->non_got_ref = 0;
5695 return TRUE;
5696 }
5697 }
5698
5699 if (h->plt.plist != NULL)
5700 {
5701 /* We should never get here, but unfortunately there are versions
5702 of gcc out there that improperly (for this ABI) put initialized
5703 function pointers, vtable refs and suchlike in read-only
5704 sections. Allow them to proceed, but warn that this might
5705 break at runtime. */
5706 (*_bfd_error_handler)
5707 (_("copy reloc against `%s' requires lazy plt linking; "
5708 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5709 h->root.root.string);
5710 }
5711
5712 /* This is a reference to a symbol defined by a dynamic object which
5713 is not a function. */
5714
5715 /* We must allocate the symbol in our .dynbss section, which will
5716 become part of the .bss section of the executable. There will be
5717 an entry for this symbol in the .dynsym section. The dynamic
5718 object will contain position independent code, so all references
5719 from the dynamic object to this symbol will go through the global
5720 offset table. The dynamic linker will use the .dynsym entry to
5721 determine the address it must put in the global offset table, so
5722 both the dynamic object and the regular object will refer to the
5723 same memory location for the variable. */
5724
5725 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5726 to copy the initial value out of the dynamic object and into the
5727 runtime process image. We need to remember the offset into the
5728 .rela.bss section we are going to use. */
5729 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5730 {
5731 htab->relbss->size += sizeof (Elf64_External_Rela);
5732 h->needs_copy = 1;
5733 }
5734
5735 /* We need to figure out the alignment required for this symbol. I
5736 have no idea how ELF linkers handle this. */
5737 power_of_two = bfd_log2 (h->size);
5738 if (power_of_two > 4)
5739 power_of_two = 4;
5740
5741 /* Apply the required alignment. */
5742 s = htab->dynbss;
5743 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5744 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5745 {
5746 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5747 return FALSE;
5748 }
5749
5750 /* Define the symbol as being at this point in the section. */
5751 h->root.u.def.section = s;
5752 h->root.u.def.value = s->size;
5753
5754 /* Increment the section size to make room for the symbol. */
5755 s->size += h->size;
5756
5757 return TRUE;
5758 }
5759
5760 /* If given a function descriptor symbol, hide both the function code
5761 sym and the descriptor. */
5762 static void
5763 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5764 struct elf_link_hash_entry *h,
5765 bfd_boolean force_local)
5766 {
5767 struct ppc_link_hash_entry *eh;
5768 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5769
5770 eh = (struct ppc_link_hash_entry *) h;
5771 if (eh->is_func_descriptor)
5772 {
5773 struct ppc_link_hash_entry *fh = eh->oh;
5774
5775 if (fh == NULL)
5776 {
5777 const char *p, *q;
5778 struct ppc_link_hash_table *htab;
5779 char save;
5780
5781 /* We aren't supposed to use alloca in BFD because on
5782 systems which do not have alloca the version in libiberty
5783 calls xmalloc, which might cause the program to crash
5784 when it runs out of memory. This function doesn't have a
5785 return status, so there's no way to gracefully return an
5786 error. So cheat. We know that string[-1] can be safely
5787 accessed; It's either a string in an ELF string table,
5788 or allocated in an objalloc structure. */
5789
5790 p = eh->elf.root.root.string - 1;
5791 save = *p;
5792 *(char *) p = '.';
5793 htab = ppc_hash_table (info);
5794 fh = (struct ppc_link_hash_entry *)
5795 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5796 *(char *) p = save;
5797
5798 /* Unfortunately, if it so happens that the string we were
5799 looking for was allocated immediately before this string,
5800 then we overwrote the string terminator. That's the only
5801 reason the lookup should fail. */
5802 if (fh == NULL)
5803 {
5804 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5805 while (q >= eh->elf.root.root.string && *q == *p)
5806 --q, --p;
5807 if (q < eh->elf.root.root.string && *p == '.')
5808 fh = (struct ppc_link_hash_entry *)
5809 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5810 }
5811 if (fh != NULL)
5812 {
5813 eh->oh = fh;
5814 fh->oh = eh;
5815 }
5816 }
5817 if (fh != NULL)
5818 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5819 }
5820 }
5821
5822 static bfd_boolean
5823 get_sym_h (struct elf_link_hash_entry **hp,
5824 Elf_Internal_Sym **symp,
5825 asection **symsecp,
5826 char **tls_maskp,
5827 Elf_Internal_Sym **locsymsp,
5828 unsigned long r_symndx,
5829 bfd *ibfd)
5830 {
5831 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5832
5833 if (r_symndx >= symtab_hdr->sh_info)
5834 {
5835 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5836 struct elf_link_hash_entry *h;
5837
5838 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5839 while (h->root.type == bfd_link_hash_indirect
5840 || h->root.type == bfd_link_hash_warning)
5841 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5842
5843 if (hp != NULL)
5844 *hp = h;
5845
5846 if (symp != NULL)
5847 *symp = NULL;
5848
5849 if (symsecp != NULL)
5850 {
5851 asection *symsec = NULL;
5852 if (h->root.type == bfd_link_hash_defined
5853 || h->root.type == bfd_link_hash_defweak)
5854 symsec = h->root.u.def.section;
5855 *symsecp = symsec;
5856 }
5857
5858 if (tls_maskp != NULL)
5859 {
5860 struct ppc_link_hash_entry *eh;
5861
5862 eh = (struct ppc_link_hash_entry *) h;
5863 *tls_maskp = &eh->tls_mask;
5864 }
5865 }
5866 else
5867 {
5868 Elf_Internal_Sym *sym;
5869 Elf_Internal_Sym *locsyms = *locsymsp;
5870
5871 if (locsyms == NULL)
5872 {
5873 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5874 if (locsyms == NULL)
5875 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5876 symtab_hdr->sh_info,
5877 0, NULL, NULL, NULL);
5878 if (locsyms == NULL)
5879 return FALSE;
5880 *locsymsp = locsyms;
5881 }
5882 sym = locsyms + r_symndx;
5883
5884 if (hp != NULL)
5885 *hp = NULL;
5886
5887 if (symp != NULL)
5888 *symp = sym;
5889
5890 if (symsecp != NULL)
5891 {
5892 asection *symsec = NULL;
5893 if ((sym->st_shndx != SHN_UNDEF
5894 && sym->st_shndx < SHN_LORESERVE)
5895 || sym->st_shndx > SHN_HIRESERVE)
5896 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5897 *symsecp = symsec;
5898 }
5899
5900 if (tls_maskp != NULL)
5901 {
5902 struct got_entry **lgot_ents;
5903 char *tls_mask;
5904
5905 tls_mask = NULL;
5906 lgot_ents = elf_local_got_ents (ibfd);
5907 if (lgot_ents != NULL)
5908 {
5909 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5910 tls_mask = &lgot_masks[r_symndx];
5911 }
5912 *tls_maskp = tls_mask;
5913 }
5914 }
5915 return TRUE;
5916 }
5917
5918 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5919 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5920 type suitable for optimization, and 1 otherwise. */
5921
5922 static int
5923 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5924 Elf_Internal_Sym **locsymsp,
5925 const Elf_Internal_Rela *rel, bfd *ibfd)
5926 {
5927 unsigned long r_symndx;
5928 int next_r;
5929 struct elf_link_hash_entry *h;
5930 Elf_Internal_Sym *sym;
5931 asection *sec;
5932 bfd_vma off;
5933
5934 r_symndx = ELF64_R_SYM (rel->r_info);
5935 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5936 return 0;
5937
5938 if ((*tls_maskp != NULL && **tls_maskp != 0)
5939 || sec == NULL
5940 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5941 return 1;
5942
5943 /* Look inside a TOC section too. */
5944 if (h != NULL)
5945 {
5946 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5947 off = h->root.u.def.value;
5948 }
5949 else
5950 off = sym->st_value;
5951 off += rel->r_addend;
5952 BFD_ASSERT (off % 8 == 0);
5953 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5954 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5955 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5956 return 0;
5957 if (toc_symndx != NULL)
5958 *toc_symndx = r_symndx;
5959 if ((h == NULL
5960 || ((h->root.type == bfd_link_hash_defined
5961 || h->root.type == bfd_link_hash_defweak)
5962 && !h->def_dynamic))
5963 && (next_r == -1 || next_r == -2))
5964 return 1 - next_r;
5965 return 1;
5966 }
5967
5968 /* Adjust all global syms defined in opd sections. In gcc generated
5969 code for the old ABI, these will already have been done. */
5970
5971 static bfd_boolean
5972 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5973 {
5974 struct ppc_link_hash_entry *eh;
5975 asection *sym_sec;
5976 long *opd_adjust;
5977
5978 if (h->root.type == bfd_link_hash_indirect)
5979 return TRUE;
5980
5981 if (h->root.type == bfd_link_hash_warning)
5982 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5983
5984 if (h->root.type != bfd_link_hash_defined
5985 && h->root.type != bfd_link_hash_defweak)
5986 return TRUE;
5987
5988 eh = (struct ppc_link_hash_entry *) h;
5989 if (eh->adjust_done)
5990 return TRUE;
5991
5992 sym_sec = eh->elf.root.u.def.section;
5993 opd_adjust = get_opd_info (sym_sec);
5994 if (opd_adjust != NULL)
5995 {
5996 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5997 if (adjust == -1)
5998 {
5999 /* This entry has been deleted. */
6000 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6001 if (dsec == NULL)
6002 {
6003 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6004 if (elf_discarded_section (dsec))
6005 {
6006 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6007 break;
6008 }
6009 }
6010 eh->elf.root.u.def.value = 0;
6011 eh->elf.root.u.def.section = dsec;
6012 }
6013 else
6014 eh->elf.root.u.def.value += adjust;
6015 eh->adjust_done = 1;
6016 }
6017 return TRUE;
6018 }
6019
6020 /* Handles decrementing dynamic reloc counts for the reloc specified by
6021 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6022 have already been determined. */
6023
6024 static bfd_boolean
6025 dec_dynrel_count (bfd_vma r_info,
6026 asection *sec,
6027 struct bfd_link_info *info,
6028 Elf_Internal_Sym **local_syms,
6029 struct elf_link_hash_entry *h,
6030 asection *sym_sec)
6031 {
6032 enum elf_ppc64_reloc_type r_type;
6033 struct ppc_dyn_relocs *p;
6034 struct ppc_dyn_relocs **pp;
6035
6036 /* Can this reloc be dynamic? This switch, and later tests here
6037 should be kept in sync with the code in check_relocs. */
6038 r_type = ELF64_R_TYPE (r_info);
6039 switch (r_type)
6040 {
6041 default:
6042 return TRUE;
6043
6044 case R_PPC64_TPREL16:
6045 case R_PPC64_TPREL16_LO:
6046 case R_PPC64_TPREL16_HI:
6047 case R_PPC64_TPREL16_HA:
6048 case R_PPC64_TPREL16_DS:
6049 case R_PPC64_TPREL16_LO_DS:
6050 case R_PPC64_TPREL16_HIGHER:
6051 case R_PPC64_TPREL16_HIGHERA:
6052 case R_PPC64_TPREL16_HIGHEST:
6053 case R_PPC64_TPREL16_HIGHESTA:
6054 if (!info->shared)
6055 return TRUE;
6056
6057 case R_PPC64_TPREL64:
6058 case R_PPC64_DTPMOD64:
6059 case R_PPC64_DTPREL64:
6060 case R_PPC64_ADDR64:
6061 case R_PPC64_REL30:
6062 case R_PPC64_REL32:
6063 case R_PPC64_REL64:
6064 case R_PPC64_ADDR14:
6065 case R_PPC64_ADDR14_BRNTAKEN:
6066 case R_PPC64_ADDR14_BRTAKEN:
6067 case R_PPC64_ADDR16:
6068 case R_PPC64_ADDR16_DS:
6069 case R_PPC64_ADDR16_HA:
6070 case R_PPC64_ADDR16_HI:
6071 case R_PPC64_ADDR16_HIGHER:
6072 case R_PPC64_ADDR16_HIGHERA:
6073 case R_PPC64_ADDR16_HIGHEST:
6074 case R_PPC64_ADDR16_HIGHESTA:
6075 case R_PPC64_ADDR16_LO:
6076 case R_PPC64_ADDR16_LO_DS:
6077 case R_PPC64_ADDR24:
6078 case R_PPC64_ADDR32:
6079 case R_PPC64_UADDR16:
6080 case R_PPC64_UADDR32:
6081 case R_PPC64_UADDR64:
6082 case R_PPC64_TOC:
6083 break;
6084 }
6085
6086 if (local_syms != NULL)
6087 {
6088 unsigned long r_symndx;
6089 Elf_Internal_Sym *sym;
6090 bfd *ibfd = sec->owner;
6091
6092 r_symndx = ELF64_R_SYM (r_info);
6093 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6094 return FALSE;
6095 }
6096
6097 if ((info->shared
6098 && (MUST_BE_DYN_RELOC (r_type)
6099 || (h != NULL
6100 && (!info->symbolic
6101 || h->root.type == bfd_link_hash_defweak
6102 || !h->def_regular))))
6103 || (ELIMINATE_COPY_RELOCS
6104 && !info->shared
6105 && h != NULL
6106 && (h->root.type == bfd_link_hash_defweak
6107 || !h->def_regular)))
6108 ;
6109 else
6110 return TRUE;
6111
6112 if (h != NULL)
6113 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6114 else if (sym_sec != NULL)
6115 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6116 else
6117 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6118
6119 while ((p = *pp) != NULL)
6120 {
6121 if (p->sec == sec)
6122 {
6123 if (!MUST_BE_DYN_RELOC (r_type))
6124 p->pc_count -= 1;
6125 p->count -= 1;
6126 if (p->count == 0)
6127 *pp = p->next;
6128 return TRUE;
6129 }
6130 pp = &p->next;
6131 }
6132
6133 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6134 sec->owner, sec);
6135 bfd_set_error (bfd_error_bad_value);
6136 return FALSE;
6137 }
6138
6139 /* Remove unused Official Procedure Descriptor entries. Currently we
6140 only remove those associated with functions in discarded link-once
6141 sections, or weakly defined functions that have been overridden. It
6142 would be possible to remove many more entries for statically linked
6143 applications. */
6144
6145 bfd_boolean
6146 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6147 bfd_boolean no_opd_opt,
6148 bfd_boolean non_overlapping)
6149 {
6150 bfd *ibfd;
6151 bfd_boolean some_edited = FALSE;
6152 asection *need_pad = NULL;
6153
6154 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6155 {
6156 asection *sec;
6157 Elf_Internal_Rela *relstart, *rel, *relend;
6158 Elf_Internal_Shdr *symtab_hdr;
6159 Elf_Internal_Sym *local_syms;
6160 struct elf_link_hash_entry **sym_hashes;
6161 bfd_vma offset;
6162 bfd_size_type amt;
6163 long *opd_adjust;
6164 bfd_boolean need_edit, add_aux_fields;
6165 bfd_size_type cnt_16b = 0;
6166
6167 sec = bfd_get_section_by_name (ibfd, ".opd");
6168 if (sec == NULL || sec->size == 0)
6169 continue;
6170
6171 amt = sec->size * sizeof (long) / 8;
6172 opd_adjust = get_opd_info (sec);
6173 if (opd_adjust == NULL)
6174 {
6175 /* check_relocs hasn't been called. Must be a ld -r link
6176 or --just-symbols object. */
6177 opd_adjust = bfd_alloc (obfd, amt);
6178 if (opd_adjust == NULL)
6179 return FALSE;
6180 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6181 }
6182 memset (opd_adjust, 0, amt);
6183
6184 if (no_opd_opt)
6185 continue;
6186
6187 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6188 continue;
6189
6190 if (sec->output_section == bfd_abs_section_ptr)
6191 continue;
6192
6193 /* Look through the section relocs. */
6194 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6195 continue;
6196
6197 local_syms = NULL;
6198 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6199 sym_hashes = elf_sym_hashes (ibfd);
6200
6201 /* Read the relocations. */
6202 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6203 info->keep_memory);
6204 if (relstart == NULL)
6205 return FALSE;
6206
6207 /* First run through the relocs to check they are sane, and to
6208 determine whether we need to edit this opd section. */
6209 need_edit = FALSE;
6210 need_pad = sec;
6211 offset = 0;
6212 relend = relstart + sec->reloc_count;
6213 for (rel = relstart; rel < relend; )
6214 {
6215 enum elf_ppc64_reloc_type r_type;
6216 unsigned long r_symndx;
6217 asection *sym_sec;
6218 struct elf_link_hash_entry *h;
6219 Elf_Internal_Sym *sym;
6220
6221 /* .opd contains a regular array of 16 or 24 byte entries. We're
6222 only interested in the reloc pointing to a function entry
6223 point. */
6224 if (rel->r_offset != offset
6225 || rel + 1 >= relend
6226 || (rel + 1)->r_offset != offset + 8)
6227 {
6228 /* If someone messes with .opd alignment then after a
6229 "ld -r" we might have padding in the middle of .opd.
6230 Also, there's nothing to prevent someone putting
6231 something silly in .opd with the assembler. No .opd
6232 optimization for them! */
6233 broken_opd:
6234 (*_bfd_error_handler)
6235 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6236 need_edit = FALSE;
6237 break;
6238 }
6239
6240 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6241 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6242 {
6243 (*_bfd_error_handler)
6244 (_("%B: unexpected reloc type %u in .opd section"),
6245 ibfd, r_type);
6246 need_edit = FALSE;
6247 break;
6248 }
6249
6250 r_symndx = ELF64_R_SYM (rel->r_info);
6251 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6252 r_symndx, ibfd))
6253 goto error_ret;
6254
6255 if (sym_sec == NULL || sym_sec->owner == NULL)
6256 {
6257 const char *sym_name;
6258 if (h != NULL)
6259 sym_name = h->root.root.string;
6260 else
6261 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6262 sym_sec);
6263
6264 (*_bfd_error_handler)
6265 (_("%B: undefined sym `%s' in .opd section"),
6266 ibfd, sym_name);
6267 need_edit = FALSE;
6268 break;
6269 }
6270
6271 /* opd entries are always for functions defined in the
6272 current input bfd. If the symbol isn't defined in the
6273 input bfd, then we won't be using the function in this
6274 bfd; It must be defined in a linkonce section in another
6275 bfd, or is weak. It's also possible that we are
6276 discarding the function due to a linker script /DISCARD/,
6277 which we test for via the output_section. */
6278 if (sym_sec->owner != ibfd
6279 || sym_sec->output_section == bfd_abs_section_ptr)
6280 need_edit = TRUE;
6281
6282 rel += 2;
6283 if (rel == relend
6284 || (rel + 1 == relend && rel->r_offset == offset + 16))
6285 {
6286 if (sec->size == offset + 24)
6287 {
6288 need_pad = NULL;
6289 break;
6290 }
6291 if (rel == relend && sec->size == offset + 16)
6292 {
6293 cnt_16b++;
6294 break;
6295 }
6296 goto broken_opd;
6297 }
6298
6299 if (rel->r_offset == offset + 24)
6300 offset += 24;
6301 else if (rel->r_offset != offset + 16)
6302 goto broken_opd;
6303 else if (rel + 1 < relend
6304 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6305 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6306 {
6307 offset += 16;
6308 cnt_16b++;
6309 }
6310 else if (rel + 2 < relend
6311 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6312 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6313 {
6314 offset += 24;
6315 rel += 1;
6316 }
6317 else
6318 goto broken_opd;
6319 }
6320
6321 add_aux_fields = non_overlapping && cnt_16b > 0;
6322
6323 if (need_edit || add_aux_fields)
6324 {
6325 Elf_Internal_Rela *write_rel;
6326 bfd_byte *rptr, *wptr;
6327 bfd_byte *new_contents = NULL;
6328 bfd_boolean skip;
6329 long opd_ent_size;
6330
6331 /* This seems a waste of time as input .opd sections are all
6332 zeros as generated by gcc, but I suppose there's no reason
6333 this will always be so. We might start putting something in
6334 the third word of .opd entries. */
6335 if ((sec->flags & SEC_IN_MEMORY) == 0)
6336 {
6337 bfd_byte *loc;
6338 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6339 {
6340 if (loc != NULL)
6341 free (loc);
6342 error_ret:
6343 if (local_syms != NULL
6344 && symtab_hdr->contents != (unsigned char *) local_syms)
6345 free (local_syms);
6346 if (elf_section_data (sec)->relocs != relstart)
6347 free (relstart);
6348 return FALSE;
6349 }
6350 sec->contents = loc;
6351 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6352 }
6353
6354 elf_section_data (sec)->relocs = relstart;
6355
6356 new_contents = sec->contents;
6357 if (add_aux_fields)
6358 {
6359 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6360 if (new_contents == NULL)
6361 return FALSE;
6362 need_pad = FALSE;
6363 }
6364 wptr = new_contents;
6365 rptr = sec->contents;
6366
6367 write_rel = relstart;
6368 skip = FALSE;
6369 offset = 0;
6370 opd_ent_size = 0;
6371 for (rel = relstart; rel < relend; rel++)
6372 {
6373 unsigned long r_symndx;
6374 asection *sym_sec;
6375 struct elf_link_hash_entry *h;
6376 Elf_Internal_Sym *sym;
6377
6378 r_symndx = ELF64_R_SYM (rel->r_info);
6379 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6380 r_symndx, ibfd))
6381 goto error_ret;
6382
6383 if (rel->r_offset == offset)
6384 {
6385 struct ppc_link_hash_entry *fdh = NULL;
6386
6387 /* See if the .opd entry is full 24 byte or
6388 16 byte (with fd_aux entry overlapped with next
6389 fd_func). */
6390 opd_ent_size = 24;
6391 if ((rel + 2 == relend && sec->size == offset + 16)
6392 || (rel + 3 < relend
6393 && rel[2].r_offset == offset + 16
6394 && rel[3].r_offset == offset + 24
6395 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6396 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6397 opd_ent_size = 16;
6398
6399 if (h != NULL
6400 && h->root.root.string[0] == '.')
6401 {
6402 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6403 ppc_hash_table (info));
6404 if (fdh != NULL
6405 && fdh->elf.root.type != bfd_link_hash_defined
6406 && fdh->elf.root.type != bfd_link_hash_defweak)
6407 fdh = NULL;
6408 }
6409
6410 skip = (sym_sec->owner != ibfd
6411 || sym_sec->output_section == bfd_abs_section_ptr);
6412 if (skip)
6413 {
6414 if (fdh != NULL && sym_sec->owner == ibfd)
6415 {
6416 /* Arrange for the function descriptor sym
6417 to be dropped. */
6418 fdh->elf.root.u.def.value = 0;
6419 fdh->elf.root.u.def.section = sym_sec;
6420 }
6421 opd_adjust[rel->r_offset / 8] = -1;
6422 }
6423 else
6424 {
6425 /* We'll be keeping this opd entry. */
6426
6427 if (fdh != NULL)
6428 {
6429 /* Redefine the function descriptor symbol to
6430 this location in the opd section. It is
6431 necessary to update the value here rather
6432 than using an array of adjustments as we do
6433 for local symbols, because various places
6434 in the generic ELF code use the value
6435 stored in u.def.value. */
6436 fdh->elf.root.u.def.value = wptr - new_contents;
6437 fdh->adjust_done = 1;
6438 }
6439
6440 /* Local syms are a bit tricky. We could
6441 tweak them as they can be cached, but
6442 we'd need to look through the local syms
6443 for the function descriptor sym which we
6444 don't have at the moment. So keep an
6445 array of adjustments. */
6446 opd_adjust[rel->r_offset / 8]
6447 = (wptr - new_contents) - (rptr - sec->contents);
6448
6449 if (wptr != rptr)
6450 memcpy (wptr, rptr, opd_ent_size);
6451 wptr += opd_ent_size;
6452 if (add_aux_fields && opd_ent_size == 16)
6453 {
6454 memset (wptr, '\0', 8);
6455 wptr += 8;
6456 }
6457 }
6458 rptr += opd_ent_size;
6459 offset += opd_ent_size;
6460 }
6461
6462 if (skip)
6463 {
6464 if (!info->relocatable
6465 && !dec_dynrel_count (rel->r_info, sec, info,
6466 NULL, h, sym_sec))
6467 goto error_ret;
6468 }
6469 else
6470 {
6471 /* We need to adjust any reloc offsets to point to the
6472 new opd entries. While we're at it, we may as well
6473 remove redundant relocs. */
6474 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6475 if (write_rel != rel)
6476 memcpy (write_rel, rel, sizeof (*rel));
6477 ++write_rel;
6478 }
6479 }
6480
6481 sec->size = wptr - new_contents;
6482 sec->reloc_count = write_rel - relstart;
6483 if (add_aux_fields)
6484 {
6485 free (sec->contents);
6486 sec->contents = new_contents;
6487 }
6488
6489 /* Fudge the size too, as this is used later in
6490 elf_bfd_final_link if we are emitting relocs. */
6491 elf_section_data (sec)->rel_hdr.sh_size
6492 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6493 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6494 some_edited = TRUE;
6495 }
6496 else if (elf_section_data (sec)->relocs != relstart)
6497 free (relstart);
6498
6499 if (local_syms != NULL
6500 && symtab_hdr->contents != (unsigned char *) local_syms)
6501 {
6502 if (!info->keep_memory)
6503 free (local_syms);
6504 else
6505 symtab_hdr->contents = (unsigned char *) local_syms;
6506 }
6507 }
6508
6509 if (some_edited)
6510 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6511
6512 /* If we are doing a final link and the last .opd entry is just 16 byte
6513 long, add a 8 byte padding after it. */
6514 if (need_pad != NULL && !info->relocatable)
6515 {
6516 bfd_byte *p;
6517
6518 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6519 {
6520 BFD_ASSERT (need_pad->size > 0);
6521
6522 p = bfd_malloc (need_pad->size + 8);
6523 if (p == NULL)
6524 return FALSE;
6525
6526 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6527 p, 0, need_pad->size))
6528 return FALSE;
6529
6530 need_pad->contents = p;
6531 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6532 }
6533 else
6534 {
6535 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6536 if (p == NULL)
6537 return FALSE;
6538
6539 need_pad->contents = p;
6540 }
6541
6542 memset (need_pad->contents + need_pad->size, 0, 8);
6543 need_pad->size += 8;
6544 }
6545
6546 return TRUE;
6547 }
6548
6549 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6550
6551 asection *
6552 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6553 {
6554 struct ppc_link_hash_table *htab;
6555
6556 htab = ppc_hash_table (info);
6557 if (htab->tls_get_addr != NULL)
6558 {
6559 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6560
6561 while (h->elf.root.type == bfd_link_hash_indirect
6562 || h->elf.root.type == bfd_link_hash_warning)
6563 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6564
6565 htab->tls_get_addr = h;
6566
6567 if (htab->tls_get_addr_fd == NULL
6568 && h->oh != NULL
6569 && h->oh->is_func_descriptor
6570 && (h->oh->elf.root.type == bfd_link_hash_defined
6571 || h->oh->elf.root.type == bfd_link_hash_defweak))
6572 htab->tls_get_addr_fd = h->oh;
6573 }
6574
6575 if (htab->tls_get_addr_fd != NULL)
6576 {
6577 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6578
6579 while (h->elf.root.type == bfd_link_hash_indirect
6580 || h->elf.root.type == bfd_link_hash_warning)
6581 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6582
6583 htab->tls_get_addr_fd = h;
6584 }
6585
6586 return _bfd_elf_tls_setup (obfd, info);
6587 }
6588
6589 /* Run through all the TLS relocs looking for optimization
6590 opportunities. The linker has been hacked (see ppc64elf.em) to do
6591 a preliminary section layout so that we know the TLS segment
6592 offsets. We can't optimize earlier because some optimizations need
6593 to know the tp offset, and we need to optimize before allocating
6594 dynamic relocations. */
6595
6596 bfd_boolean
6597 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6598 {
6599 bfd *ibfd;
6600 asection *sec;
6601 struct ppc_link_hash_table *htab;
6602
6603 if (info->relocatable || info->shared)
6604 return TRUE;
6605
6606 htab = ppc_hash_table (info);
6607 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6608 {
6609 Elf_Internal_Sym *locsyms = NULL;
6610
6611 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6612 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6613 {
6614 Elf_Internal_Rela *relstart, *rel, *relend;
6615 int expecting_tls_get_addr;
6616
6617 /* Read the relocations. */
6618 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6619 info->keep_memory);
6620 if (relstart == NULL)
6621 return FALSE;
6622
6623 expecting_tls_get_addr = 0;
6624 relend = relstart + sec->reloc_count;
6625 for (rel = relstart; rel < relend; rel++)
6626 {
6627 enum elf_ppc64_reloc_type r_type;
6628 unsigned long r_symndx;
6629 struct elf_link_hash_entry *h;
6630 Elf_Internal_Sym *sym;
6631 asection *sym_sec;
6632 char *tls_mask;
6633 char tls_set, tls_clear, tls_type = 0;
6634 bfd_vma value;
6635 bfd_boolean ok_tprel, is_local;
6636
6637 r_symndx = ELF64_R_SYM (rel->r_info);
6638 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6639 r_symndx, ibfd))
6640 {
6641 err_free_rel:
6642 if (elf_section_data (sec)->relocs != relstart)
6643 free (relstart);
6644 if (locsyms != NULL
6645 && (elf_tdata (ibfd)->symtab_hdr.contents
6646 != (unsigned char *) locsyms))
6647 free (locsyms);
6648 return FALSE;
6649 }
6650
6651 if (h != NULL)
6652 {
6653 if (h->root.type != bfd_link_hash_defined
6654 && h->root.type != bfd_link_hash_defweak)
6655 continue;
6656 value = h->root.u.def.value;
6657 }
6658 else
6659 /* Symbols referenced by TLS relocs must be of type
6660 STT_TLS. So no need for .opd local sym adjust. */
6661 value = sym->st_value;
6662
6663 ok_tprel = FALSE;
6664 is_local = FALSE;
6665 if (h == NULL
6666 || !h->def_dynamic)
6667 {
6668 is_local = TRUE;
6669 value += sym_sec->output_offset;
6670 value += sym_sec->output_section->vma;
6671 value -= htab->elf.tls_sec->vma;
6672 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6673 < (bfd_vma) 1 << 32);
6674 }
6675
6676 r_type = ELF64_R_TYPE (rel->r_info);
6677 switch (r_type)
6678 {
6679 case R_PPC64_GOT_TLSLD16:
6680 case R_PPC64_GOT_TLSLD16_LO:
6681 case R_PPC64_GOT_TLSLD16_HI:
6682 case R_PPC64_GOT_TLSLD16_HA:
6683 /* These relocs should never be against a symbol
6684 defined in a shared lib. Leave them alone if
6685 that turns out to be the case. */
6686 ppc64_tlsld_got (ibfd)->refcount -= 1;
6687 if (!is_local)
6688 continue;
6689
6690 /* LD -> LE */
6691 tls_set = 0;
6692 tls_clear = TLS_LD;
6693 tls_type = TLS_TLS | TLS_LD;
6694 expecting_tls_get_addr = 1;
6695 break;
6696
6697 case R_PPC64_GOT_TLSGD16:
6698 case R_PPC64_GOT_TLSGD16_LO:
6699 case R_PPC64_GOT_TLSGD16_HI:
6700 case R_PPC64_GOT_TLSGD16_HA:
6701 if (ok_tprel)
6702 /* GD -> LE */
6703 tls_set = 0;
6704 else
6705 /* GD -> IE */
6706 tls_set = TLS_TLS | TLS_TPRELGD;
6707 tls_clear = TLS_GD;
6708 tls_type = TLS_TLS | TLS_GD;
6709 expecting_tls_get_addr = 1;
6710 break;
6711
6712 case R_PPC64_GOT_TPREL16_DS:
6713 case R_PPC64_GOT_TPREL16_LO_DS:
6714 case R_PPC64_GOT_TPREL16_HI:
6715 case R_PPC64_GOT_TPREL16_HA:
6716 expecting_tls_get_addr = 0;
6717 if (ok_tprel)
6718 {
6719 /* IE -> LE */
6720 tls_set = 0;
6721 tls_clear = TLS_TPREL;
6722 tls_type = TLS_TLS | TLS_TPREL;
6723 break;
6724 }
6725 else
6726 continue;
6727
6728 case R_PPC64_REL14:
6729 case R_PPC64_REL14_BRTAKEN:
6730 case R_PPC64_REL14_BRNTAKEN:
6731 case R_PPC64_REL24:
6732 if (h != NULL
6733 && (h == &htab->tls_get_addr->elf
6734 || h == &htab->tls_get_addr_fd->elf))
6735 {
6736 if (!expecting_tls_get_addr
6737 && rel != relstart
6738 && ((ELF64_R_TYPE (rel[-1].r_info)
6739 == R_PPC64_TOC16)
6740 || (ELF64_R_TYPE (rel[-1].r_info)
6741 == R_PPC64_TOC16_LO)))
6742 {
6743 /* Check for toc tls entries. */
6744 char *toc_tls;
6745 int retval;
6746
6747 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6748 rel - 1, ibfd);
6749 if (retval == 0)
6750 goto err_free_rel;
6751 if (toc_tls != NULL)
6752 expecting_tls_get_addr = retval > 1;
6753 }
6754
6755 if (expecting_tls_get_addr)
6756 {
6757 struct plt_entry *ent;
6758 for (ent = h->plt.plist; ent; ent = ent->next)
6759 if (ent->addend == 0)
6760 {
6761 if (ent->plt.refcount > 0)
6762 ent->plt.refcount -= 1;
6763 break;
6764 }
6765 }
6766 }
6767 expecting_tls_get_addr = 0;
6768 continue;
6769
6770 case R_PPC64_TPREL64:
6771 expecting_tls_get_addr = 0;
6772 if (ok_tprel)
6773 {
6774 /* IE -> LE */
6775 tls_set = TLS_EXPLICIT;
6776 tls_clear = TLS_TPREL;
6777 break;
6778 }
6779 else
6780 continue;
6781
6782 case R_PPC64_DTPMOD64:
6783 expecting_tls_get_addr = 0;
6784 if (rel + 1 < relend
6785 && (rel[1].r_info
6786 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6787 && rel[1].r_offset == rel->r_offset + 8)
6788 {
6789 if (ok_tprel)
6790 /* GD -> LE */
6791 tls_set = TLS_EXPLICIT | TLS_GD;
6792 else
6793 /* GD -> IE */
6794 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6795 tls_clear = TLS_GD;
6796 }
6797 else
6798 {
6799 if (!is_local)
6800 continue;
6801
6802 /* LD -> LE */
6803 tls_set = TLS_EXPLICIT;
6804 tls_clear = TLS_LD;
6805 }
6806 break;
6807
6808 default:
6809 expecting_tls_get_addr = 0;
6810 continue;
6811 }
6812
6813 if ((tls_set & TLS_EXPLICIT) == 0)
6814 {
6815 struct got_entry *ent;
6816
6817 /* Adjust got entry for this reloc. */
6818 if (h != NULL)
6819 ent = h->got.glist;
6820 else
6821 ent = elf_local_got_ents (ibfd)[r_symndx];
6822
6823 for (; ent != NULL; ent = ent->next)
6824 if (ent->addend == rel->r_addend
6825 && ent->owner == ibfd
6826 && ent->tls_type == tls_type)
6827 break;
6828 if (ent == NULL)
6829 abort ();
6830
6831 if (tls_set == 0)
6832 {
6833 /* We managed to get rid of a got entry. */
6834 if (ent->got.refcount > 0)
6835 ent->got.refcount -= 1;
6836 }
6837 }
6838 else
6839 {
6840 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6841 we'll lose one or two dyn relocs. */
6842 if (!dec_dynrel_count (rel->r_info, sec, info,
6843 NULL, h, sym_sec))
6844 return FALSE;
6845
6846 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6847 {
6848 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6849 NULL, h, sym_sec))
6850 return FALSE;
6851 }
6852 }
6853
6854 *tls_mask |= tls_set;
6855 *tls_mask &= ~tls_clear;
6856 }
6857
6858 if (elf_section_data (sec)->relocs != relstart)
6859 free (relstart);
6860 }
6861
6862 if (locsyms != NULL
6863 && (elf_tdata (ibfd)->symtab_hdr.contents
6864 != (unsigned char *) locsyms))
6865 {
6866 if (!info->keep_memory)
6867 free (locsyms);
6868 else
6869 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6870 }
6871 }
6872 return TRUE;
6873 }
6874
6875 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6876 the values of any global symbols in a toc section that has been
6877 edited. Globals in toc sections should be a rarity, so this function
6878 sets a flag if any are found in toc sections other than the one just
6879 edited, so that futher hash table traversals can be avoided. */
6880
6881 struct adjust_toc_info
6882 {
6883 asection *toc;
6884 unsigned long *skip;
6885 bfd_boolean global_toc_syms;
6886 };
6887
6888 static bfd_boolean
6889 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6890 {
6891 struct ppc_link_hash_entry *eh;
6892 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6893
6894 if (h->root.type == bfd_link_hash_indirect)
6895 return TRUE;
6896
6897 if (h->root.type == bfd_link_hash_warning)
6898 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6899
6900 if (h->root.type != bfd_link_hash_defined
6901 && h->root.type != bfd_link_hash_defweak)
6902 return TRUE;
6903
6904 eh = (struct ppc_link_hash_entry *) h;
6905 if (eh->adjust_done)
6906 return TRUE;
6907
6908 if (eh->elf.root.u.def.section == toc_inf->toc)
6909 {
6910 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6911 if (skip != (unsigned long) -1)
6912 eh->elf.root.u.def.value -= skip;
6913 else
6914 {
6915 (*_bfd_error_handler)
6916 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6917 eh->elf.root.u.def.section = &bfd_abs_section;
6918 eh->elf.root.u.def.value = 0;
6919 }
6920 eh->adjust_done = 1;
6921 }
6922 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6923 toc_inf->global_toc_syms = TRUE;
6924
6925 return TRUE;
6926 }
6927
6928 /* Examine all relocs referencing .toc sections in order to remove
6929 unused .toc entries. */
6930
6931 bfd_boolean
6932 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6933 {
6934 bfd *ibfd;
6935 struct adjust_toc_info toc_inf;
6936
6937 toc_inf.global_toc_syms = TRUE;
6938 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6939 {
6940 asection *toc, *sec;
6941 Elf_Internal_Shdr *symtab_hdr;
6942 Elf_Internal_Sym *local_syms;
6943 struct elf_link_hash_entry **sym_hashes;
6944 Elf_Internal_Rela *relstart, *rel;
6945 unsigned long *skip, *drop;
6946 unsigned char *used;
6947 unsigned char *keep, last, some_unused;
6948
6949 toc = bfd_get_section_by_name (ibfd, ".toc");
6950 if (toc == NULL
6951 || toc->size == 0
6952 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6953 || elf_discarded_section (toc))
6954 continue;
6955
6956 local_syms = NULL;
6957 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6958 sym_hashes = elf_sym_hashes (ibfd);
6959
6960 /* Look at sections dropped from the final link. */
6961 skip = NULL;
6962 relstart = NULL;
6963 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6964 {
6965 if (sec->reloc_count == 0
6966 || !elf_discarded_section (sec)
6967 || get_opd_info (sec)
6968 || (sec->flags & SEC_ALLOC) == 0
6969 || (sec->flags & SEC_DEBUGGING) != 0)
6970 continue;
6971
6972 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6973 if (relstart == NULL)
6974 goto error_ret;
6975
6976 /* Run through the relocs to see which toc entries might be
6977 unused. */
6978 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6979 {
6980 enum elf_ppc64_reloc_type r_type;
6981 unsigned long r_symndx;
6982 asection *sym_sec;
6983 struct elf_link_hash_entry *h;
6984 Elf_Internal_Sym *sym;
6985 bfd_vma val;
6986
6987 r_type = ELF64_R_TYPE (rel->r_info);
6988 switch (r_type)
6989 {
6990 default:
6991 continue;
6992
6993 case R_PPC64_TOC16:
6994 case R_PPC64_TOC16_LO:
6995 case R_PPC64_TOC16_HI:
6996 case R_PPC64_TOC16_HA:
6997 case R_PPC64_TOC16_DS:
6998 case R_PPC64_TOC16_LO_DS:
6999 break;
7000 }
7001
7002 r_symndx = ELF64_R_SYM (rel->r_info);
7003 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7004 r_symndx, ibfd))
7005 goto error_ret;
7006
7007 if (sym_sec != toc)
7008 continue;
7009
7010 if (h != NULL)
7011 val = h->root.u.def.value;
7012 else
7013 val = sym->st_value;
7014 val += rel->r_addend;
7015
7016 if (val >= toc->size)
7017 continue;
7018
7019 /* Anything in the toc ought to be aligned to 8 bytes.
7020 If not, don't mark as unused. */
7021 if (val & 7)
7022 continue;
7023
7024 if (skip == NULL)
7025 {
7026 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7027 if (skip == NULL)
7028 goto error_ret;
7029 }
7030
7031 skip[val >> 3] = 1;
7032 }
7033
7034 if (elf_section_data (sec)->relocs != relstart)
7035 free (relstart);
7036 }
7037
7038 if (skip == NULL)
7039 continue;
7040
7041 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7042 if (used == NULL)
7043 {
7044 error_ret:
7045 if (local_syms != NULL
7046 && symtab_hdr->contents != (unsigned char *) local_syms)
7047 free (local_syms);
7048 if (sec != NULL
7049 && relstart != NULL
7050 && elf_section_data (sec)->relocs != relstart)
7051 free (relstart);
7052 if (skip != NULL)
7053 free (skip);
7054 return FALSE;
7055 }
7056
7057 /* Now check all kept sections that might reference the toc. */
7058 for (sec = ibfd->sections;
7059 sec != NULL;
7060 /* Check the toc itself last. */
7061 sec = (sec == toc ? NULL
7062 : sec->next == toc && sec->next->next ? sec->next->next
7063 : sec->next == NULL ? toc
7064 : sec->next))
7065 {
7066 int repeat;
7067
7068 if (sec->reloc_count == 0
7069 || elf_discarded_section (sec)
7070 || get_opd_info (sec)
7071 || (sec->flags & SEC_ALLOC) == 0
7072 || (sec->flags & SEC_DEBUGGING) != 0)
7073 continue;
7074
7075 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7076 if (relstart == NULL)
7077 goto error_ret;
7078
7079 /* Mark toc entries referenced as used. */
7080 repeat = 0;
7081 do
7082 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7083 {
7084 enum elf_ppc64_reloc_type r_type;
7085 unsigned long r_symndx;
7086 asection *sym_sec;
7087 struct elf_link_hash_entry *h;
7088 Elf_Internal_Sym *sym;
7089 bfd_vma val;
7090
7091 r_type = ELF64_R_TYPE (rel->r_info);
7092 switch (r_type)
7093 {
7094 case R_PPC64_TOC16:
7095 case R_PPC64_TOC16_LO:
7096 case R_PPC64_TOC16_HI:
7097 case R_PPC64_TOC16_HA:
7098 case R_PPC64_TOC16_DS:
7099 case R_PPC64_TOC16_LO_DS:
7100 /* In case we're taking addresses of toc entries. */
7101 case R_PPC64_ADDR64:
7102 break;
7103
7104 default:
7105 continue;
7106 }
7107
7108 r_symndx = ELF64_R_SYM (rel->r_info);
7109 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7110 r_symndx, ibfd))
7111 {
7112 free (used);
7113 goto error_ret;
7114 }
7115
7116 if (sym_sec != toc)
7117 continue;
7118
7119 if (h != NULL)
7120 val = h->root.u.def.value;
7121 else
7122 val = sym->st_value;
7123 val += rel->r_addend;
7124
7125 if (val >= toc->size)
7126 continue;
7127
7128 /* For the toc section, we only mark as used if
7129 this entry itself isn't unused. */
7130 if (sec == toc
7131 && !used[val >> 3]
7132 && (used[rel->r_offset >> 3]
7133 || !skip[rel->r_offset >> 3]))
7134 /* Do all the relocs again, to catch reference
7135 chains. */
7136 repeat = 1;
7137
7138 used[val >> 3] = 1;
7139 }
7140 while (repeat);
7141 }
7142
7143 /* Merge the used and skip arrays. Assume that TOC
7144 doublewords not appearing as either used or unused belong
7145 to to an entry more than one doubleword in size. */
7146 for (drop = skip, keep = used, last = 0, some_unused = 0;
7147 drop < skip + (toc->size + 7) / 8;
7148 ++drop, ++keep)
7149 {
7150 if (*keep)
7151 {
7152 *drop = 0;
7153 last = 0;
7154 }
7155 else if (*drop)
7156 {
7157 some_unused = 1;
7158 last = 1;
7159 }
7160 else
7161 *drop = last;
7162 }
7163
7164 free (used);
7165
7166 if (some_unused)
7167 {
7168 bfd_byte *contents, *src;
7169 unsigned long off;
7170
7171 /* Shuffle the toc contents, and at the same time convert the
7172 skip array from booleans into offsets. */
7173 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7174 goto error_ret;
7175
7176 elf_section_data (toc)->this_hdr.contents = contents;
7177
7178 for (src = contents, off = 0, drop = skip;
7179 src < contents + toc->size;
7180 src += 8, ++drop)
7181 {
7182 if (*drop)
7183 {
7184 *drop = (unsigned long) -1;
7185 off += 8;
7186 }
7187 else if (off != 0)
7188 {
7189 *drop = off;
7190 memcpy (src - off, src, 8);
7191 }
7192 }
7193 toc->rawsize = toc->size;
7194 toc->size = src - contents - off;
7195
7196 if (toc->reloc_count != 0)
7197 {
7198 Elf_Internal_Rela *wrel;
7199 bfd_size_type sz;
7200
7201 /* Read toc relocs. */
7202 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7203 TRUE);
7204 if (relstart == NULL)
7205 goto error_ret;
7206
7207 /* Remove unused toc relocs, and adjust those we keep. */
7208 wrel = relstart;
7209 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7210 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7211 {
7212 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7213 wrel->r_info = rel->r_info;
7214 wrel->r_addend = rel->r_addend;
7215 ++wrel;
7216 }
7217 else if (!dec_dynrel_count (rel->r_info, toc, info,
7218 &local_syms, NULL, NULL))
7219 goto error_ret;
7220
7221 toc->reloc_count = wrel - relstart;
7222 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7223 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7224 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7225 }
7226
7227 /* Adjust addends for relocs against the toc section sym. */
7228 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7229 {
7230 if (sec->reloc_count == 0
7231 || elf_discarded_section (sec))
7232 continue;
7233
7234 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7235 TRUE);
7236 if (relstart == NULL)
7237 goto error_ret;
7238
7239 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7240 {
7241 enum elf_ppc64_reloc_type r_type;
7242 unsigned long r_symndx;
7243 asection *sym_sec;
7244 struct elf_link_hash_entry *h;
7245 Elf_Internal_Sym *sym;
7246
7247 r_type = ELF64_R_TYPE (rel->r_info);
7248 switch (r_type)
7249 {
7250 default:
7251 continue;
7252
7253 case R_PPC64_TOC16:
7254 case R_PPC64_TOC16_LO:
7255 case R_PPC64_TOC16_HI:
7256 case R_PPC64_TOC16_HA:
7257 case R_PPC64_TOC16_DS:
7258 case R_PPC64_TOC16_LO_DS:
7259 case R_PPC64_ADDR64:
7260 break;
7261 }
7262
7263 r_symndx = ELF64_R_SYM (rel->r_info);
7264 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7265 r_symndx, ibfd))
7266 goto error_ret;
7267
7268 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7269 continue;
7270
7271 rel->r_addend -= skip[rel->r_addend >> 3];
7272 }
7273 }
7274
7275 /* We shouldn't have local or global symbols defined in the TOC,
7276 but handle them anyway. */
7277 if (local_syms != NULL)
7278 {
7279 Elf_Internal_Sym *sym;
7280
7281 for (sym = local_syms;
7282 sym < local_syms + symtab_hdr->sh_info;
7283 ++sym)
7284 if (sym->st_shndx != SHN_UNDEF
7285 && (sym->st_shndx < SHN_LORESERVE
7286 || sym->st_shndx > SHN_HIRESERVE)
7287 && sym->st_value != 0
7288 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7289 {
7290 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7291 sym->st_value -= skip[sym->st_value >> 3];
7292 else
7293 {
7294 (*_bfd_error_handler)
7295 (_("%s defined in removed toc entry"),
7296 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7297 NULL));
7298 sym->st_value = 0;
7299 sym->st_shndx = SHN_ABS;
7300 }
7301 symtab_hdr->contents = (unsigned char *) local_syms;
7302 }
7303 }
7304
7305 /* Finally, adjust any global syms defined in the toc. */
7306 if (toc_inf.global_toc_syms)
7307 {
7308 toc_inf.toc = toc;
7309 toc_inf.skip = skip;
7310 toc_inf.global_toc_syms = FALSE;
7311 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7312 &toc_inf);
7313 }
7314 }
7315
7316 if (local_syms != NULL
7317 && symtab_hdr->contents != (unsigned char *) local_syms)
7318 {
7319 if (!info->keep_memory)
7320 free (local_syms);
7321 else
7322 symtab_hdr->contents = (unsigned char *) local_syms;
7323 }
7324 free (skip);
7325 }
7326
7327 return TRUE;
7328 }
7329
7330 /* Allocate space in .plt, .got and associated reloc sections for
7331 dynamic relocs. */
7332
7333 static bfd_boolean
7334 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7335 {
7336 struct bfd_link_info *info;
7337 struct ppc_link_hash_table *htab;
7338 asection *s;
7339 struct ppc_link_hash_entry *eh;
7340 struct ppc_dyn_relocs *p;
7341 struct got_entry *gent;
7342
7343 if (h->root.type == bfd_link_hash_indirect)
7344 return TRUE;
7345
7346 if (h->root.type == bfd_link_hash_warning)
7347 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7348
7349 info = (struct bfd_link_info *) inf;
7350 htab = ppc_hash_table (info);
7351
7352 if (htab->elf.dynamic_sections_created
7353 && h->dynindx != -1
7354 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7355 {
7356 struct plt_entry *pent;
7357 bfd_boolean doneone = FALSE;
7358 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7359 if (pent->plt.refcount > 0)
7360 {
7361 /* If this is the first .plt entry, make room for the special
7362 first entry. */
7363 s = htab->plt;
7364 if (s->size == 0)
7365 s->size += PLT_INITIAL_ENTRY_SIZE;
7366
7367 pent->plt.offset = s->size;
7368
7369 /* Make room for this entry. */
7370 s->size += PLT_ENTRY_SIZE;
7371
7372 /* Make room for the .glink code. */
7373 s = htab->glink;
7374 if (s->size == 0)
7375 s->size += GLINK_CALL_STUB_SIZE;
7376 /* We need bigger stubs past index 32767. */
7377 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7378 s->size += 4;
7379 s->size += 2*4;
7380
7381 /* We also need to make an entry in the .rela.plt section. */
7382 s = htab->relplt;
7383 s->size += sizeof (Elf64_External_Rela);
7384 doneone = TRUE;
7385 }
7386 else
7387 pent->plt.offset = (bfd_vma) -1;
7388 if (!doneone)
7389 {
7390 h->plt.plist = NULL;
7391 h->needs_plt = 0;
7392 }
7393 }
7394 else
7395 {
7396 h->plt.plist = NULL;
7397 h->needs_plt = 0;
7398 }
7399
7400 eh = (struct ppc_link_hash_entry *) h;
7401 /* Run through the TLS GD got entries first if we're changing them
7402 to TPREL. */
7403 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7404 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7405 if (gent->got.refcount > 0
7406 && (gent->tls_type & TLS_GD) != 0)
7407 {
7408 /* This was a GD entry that has been converted to TPREL. If
7409 there happens to be a TPREL entry we can use that one. */
7410 struct got_entry *ent;
7411 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7412 if (ent->got.refcount > 0
7413 && (ent->tls_type & TLS_TPREL) != 0
7414 && ent->addend == gent->addend
7415 && ent->owner == gent->owner)
7416 {
7417 gent->got.refcount = 0;
7418 break;
7419 }
7420
7421 /* If not, then we'll be using our own TPREL entry. */
7422 if (gent->got.refcount != 0)
7423 gent->tls_type = TLS_TLS | TLS_TPREL;
7424 }
7425
7426 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7427 if (gent->got.refcount > 0)
7428 {
7429 bfd_boolean dyn;
7430
7431 /* Make sure this symbol is output as a dynamic symbol.
7432 Undefined weak syms won't yet be marked as dynamic,
7433 nor will all TLS symbols. */
7434 if (h->dynindx == -1
7435 && !h->forced_local)
7436 {
7437 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7438 return FALSE;
7439 }
7440
7441 if ((gent->tls_type & TLS_LD) != 0
7442 && !h->def_dynamic)
7443 {
7444 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7445 continue;
7446 }
7447
7448 s = ppc64_elf_tdata (gent->owner)->got;
7449 gent->got.offset = s->size;
7450 s->size
7451 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7452 dyn = htab->elf.dynamic_sections_created;
7453 if ((info->shared
7454 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7455 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7456 || h->root.type != bfd_link_hash_undefweak))
7457 ppc64_elf_tdata (gent->owner)->relgot->size
7458 += (gent->tls_type & eh->tls_mask & TLS_GD
7459 ? 2 * sizeof (Elf64_External_Rela)
7460 : sizeof (Elf64_External_Rela));
7461 }
7462 else
7463 gent->got.offset = (bfd_vma) -1;
7464
7465 if (eh->dyn_relocs == NULL)
7466 return TRUE;
7467
7468 /* In the shared -Bsymbolic case, discard space allocated for
7469 dynamic pc-relative relocs against symbols which turn out to be
7470 defined in regular objects. For the normal shared case, discard
7471 space for relocs that have become local due to symbol visibility
7472 changes. */
7473
7474 if (info->shared)
7475 {
7476 /* Relocs that use pc_count are those that appear on a call insn,
7477 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7478 generated via assembly. We want calls to protected symbols to
7479 resolve directly to the function rather than going via the plt.
7480 If people want function pointer comparisons to work as expected
7481 then they should avoid writing weird assembly. */
7482 if (SYMBOL_CALLS_LOCAL (info, h))
7483 {
7484 struct ppc_dyn_relocs **pp;
7485
7486 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7487 {
7488 p->count -= p->pc_count;
7489 p->pc_count = 0;
7490 if (p->count == 0)
7491 *pp = p->next;
7492 else
7493 pp = &p->next;
7494 }
7495 }
7496
7497 /* Also discard relocs on undefined weak syms with non-default
7498 visibility. */
7499 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7500 && h->root.type == bfd_link_hash_undefweak)
7501 eh->dyn_relocs = NULL;
7502 }
7503 else if (ELIMINATE_COPY_RELOCS)
7504 {
7505 /* For the non-shared case, discard space for relocs against
7506 symbols which turn out to need copy relocs or are not
7507 dynamic. */
7508
7509 if (!h->non_got_ref
7510 && h->def_dynamic
7511 && !h->def_regular)
7512 {
7513 /* Make sure this symbol is output as a dynamic symbol.
7514 Undefined weak syms won't yet be marked as dynamic. */
7515 if (h->dynindx == -1
7516 && !h->forced_local)
7517 {
7518 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7519 return FALSE;
7520 }
7521
7522 /* If that succeeded, we know we'll be keeping all the
7523 relocs. */
7524 if (h->dynindx != -1)
7525 goto keep;
7526 }
7527
7528 eh->dyn_relocs = NULL;
7529
7530 keep: ;
7531 }
7532
7533 /* Finally, allocate space. */
7534 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7535 {
7536 asection *sreloc = elf_section_data (p->sec)->sreloc;
7537 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7538 }
7539
7540 return TRUE;
7541 }
7542
7543 /* Find any dynamic relocs that apply to read-only sections. */
7544
7545 static bfd_boolean
7546 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7547 {
7548 struct ppc_link_hash_entry *eh;
7549 struct ppc_dyn_relocs *p;
7550
7551 if (h->root.type == bfd_link_hash_warning)
7552 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7553
7554 eh = (struct ppc_link_hash_entry *) h;
7555 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7556 {
7557 asection *s = p->sec->output_section;
7558
7559 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7560 {
7561 struct bfd_link_info *info = inf;
7562
7563 info->flags |= DF_TEXTREL;
7564
7565 /* Not an error, just cut short the traversal. */
7566 return FALSE;
7567 }
7568 }
7569 return TRUE;
7570 }
7571
7572 /* Set the sizes of the dynamic sections. */
7573
7574 static bfd_boolean
7575 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7576 struct bfd_link_info *info)
7577 {
7578 struct ppc_link_hash_table *htab;
7579 bfd *dynobj;
7580 asection *s;
7581 bfd_boolean relocs;
7582 bfd *ibfd;
7583
7584 htab = ppc_hash_table (info);
7585 dynobj = htab->elf.dynobj;
7586 if (dynobj == NULL)
7587 abort ();
7588
7589 if (htab->elf.dynamic_sections_created)
7590 {
7591 /* Set the contents of the .interp section to the interpreter. */
7592 if (info->executable)
7593 {
7594 s = bfd_get_section_by_name (dynobj, ".interp");
7595 if (s == NULL)
7596 abort ();
7597 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7598 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7599 }
7600 }
7601
7602 /* Set up .got offsets for local syms, and space for local dynamic
7603 relocs. */
7604 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7605 {
7606 struct got_entry **lgot_ents;
7607 struct got_entry **end_lgot_ents;
7608 char *lgot_masks;
7609 bfd_size_type locsymcount;
7610 Elf_Internal_Shdr *symtab_hdr;
7611 asection *srel;
7612
7613 if (!is_ppc64_elf_target (ibfd->xvec))
7614 continue;
7615
7616 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7617 {
7618 s = ppc64_elf_tdata (ibfd)->got;
7619 ppc64_tlsld_got (ibfd)->offset = s->size;
7620 s->size += 16;
7621 if (info->shared)
7622 {
7623 srel = ppc64_elf_tdata (ibfd)->relgot;
7624 srel->size += sizeof (Elf64_External_Rela);
7625 }
7626 }
7627 else
7628 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7629
7630 for (s = ibfd->sections; s != NULL; s = s->next)
7631 {
7632 struct ppc_dyn_relocs *p;
7633
7634 for (p = *((struct ppc_dyn_relocs **)
7635 &elf_section_data (s)->local_dynrel);
7636 p != NULL;
7637 p = p->next)
7638 {
7639 if (!bfd_is_abs_section (p->sec)
7640 && bfd_is_abs_section (p->sec->output_section))
7641 {
7642 /* Input section has been discarded, either because
7643 it is a copy of a linkonce section or due to
7644 linker script /DISCARD/, so we'll be discarding
7645 the relocs too. */
7646 }
7647 else if (p->count != 0)
7648 {
7649 srel = elf_section_data (p->sec)->sreloc;
7650 srel->size += p->count * sizeof (Elf64_External_Rela);
7651 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7652 info->flags |= DF_TEXTREL;
7653 }
7654 }
7655 }
7656
7657 lgot_ents = elf_local_got_ents (ibfd);
7658 if (!lgot_ents)
7659 continue;
7660
7661 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7662 locsymcount = symtab_hdr->sh_info;
7663 end_lgot_ents = lgot_ents + locsymcount;
7664 lgot_masks = (char *) end_lgot_ents;
7665 s = ppc64_elf_tdata (ibfd)->got;
7666 srel = ppc64_elf_tdata (ibfd)->relgot;
7667 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7668 {
7669 struct got_entry *ent;
7670
7671 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7672 if (ent->got.refcount > 0)
7673 {
7674 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7675 {
7676 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7677 {
7678 ppc64_tlsld_got (ibfd)->offset = s->size;
7679 s->size += 16;
7680 if (info->shared)
7681 srel->size += sizeof (Elf64_External_Rela);
7682 }
7683 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7684 }
7685 else
7686 {
7687 ent->got.offset = s->size;
7688 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7689 {
7690 s->size += 16;
7691 if (info->shared)
7692 srel->size += 2 * sizeof (Elf64_External_Rela);
7693 }
7694 else
7695 {
7696 s->size += 8;
7697 if (info->shared)
7698 srel->size += sizeof (Elf64_External_Rela);
7699 }
7700 }
7701 }
7702 else
7703 ent->got.offset = (bfd_vma) -1;
7704 }
7705 }
7706
7707 /* Allocate global sym .plt and .got entries, and space for global
7708 sym dynamic relocs. */
7709 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7710
7711 /* We now have determined the sizes of the various dynamic sections.
7712 Allocate memory for them. */
7713 relocs = FALSE;
7714 for (s = dynobj->sections; s != NULL; s = s->next)
7715 {
7716 if ((s->flags & SEC_LINKER_CREATED) == 0)
7717 continue;
7718
7719 if (s == htab->brlt || s == htab->relbrlt)
7720 /* These haven't been allocated yet; don't strip. */
7721 continue;
7722 else if (s == htab->got
7723 || s == htab->plt
7724 || s == htab->glink
7725 || s == htab->dynbss)
7726 {
7727 /* Strip this section if we don't need it; see the
7728 comment below. */
7729 }
7730 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7731 {
7732 if (s->size != 0)
7733 {
7734 if (s != htab->relplt)
7735 relocs = TRUE;
7736
7737 /* We use the reloc_count field as a counter if we need
7738 to copy relocs into the output file. */
7739 s->reloc_count = 0;
7740 }
7741 }
7742 else
7743 {
7744 /* It's not one of our sections, so don't allocate space. */
7745 continue;
7746 }
7747
7748 if (s->size == 0)
7749 {
7750 /* If we don't need this section, strip it from the
7751 output file. This is mostly to handle .rela.bss and
7752 .rela.plt. We must create both sections in
7753 create_dynamic_sections, because they must be created
7754 before the linker maps input sections to output
7755 sections. The linker does that before
7756 adjust_dynamic_symbol is called, and it is that
7757 function which decides whether anything needs to go
7758 into these sections. */
7759 s->flags |= SEC_EXCLUDE;
7760 continue;
7761 }
7762
7763 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7764 continue;
7765
7766 /* Allocate memory for the section contents. We use bfd_zalloc
7767 here in case unused entries are not reclaimed before the
7768 section's contents are written out. This should not happen,
7769 but this way if it does we get a R_PPC64_NONE reloc in .rela
7770 sections instead of garbage.
7771 We also rely on the section contents being zero when writing
7772 the GOT. */
7773 s->contents = bfd_zalloc (dynobj, s->size);
7774 if (s->contents == NULL)
7775 return FALSE;
7776 }
7777
7778 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7779 {
7780 if (!is_ppc64_elf_target (ibfd->xvec))
7781 continue;
7782
7783 s = ppc64_elf_tdata (ibfd)->got;
7784 if (s != NULL && s != htab->got)
7785 {
7786 if (s->size == 0)
7787 s->flags |= SEC_EXCLUDE;
7788 else
7789 {
7790 s->contents = bfd_zalloc (ibfd, s->size);
7791 if (s->contents == NULL)
7792 return FALSE;
7793 }
7794 }
7795 s = ppc64_elf_tdata (ibfd)->relgot;
7796 if (s != NULL)
7797 {
7798 if (s->size == 0)
7799 s->flags |= SEC_EXCLUDE;
7800 else
7801 {
7802 s->contents = bfd_zalloc (ibfd, s->size);
7803 if (s->contents == NULL)
7804 return FALSE;
7805 relocs = TRUE;
7806 s->reloc_count = 0;
7807 }
7808 }
7809 }
7810
7811 if (htab->elf.dynamic_sections_created)
7812 {
7813 /* Add some entries to the .dynamic section. We fill in the
7814 values later, in ppc64_elf_finish_dynamic_sections, but we
7815 must add the entries now so that we get the correct size for
7816 the .dynamic section. The DT_DEBUG entry is filled in by the
7817 dynamic linker and used by the debugger. */
7818 #define add_dynamic_entry(TAG, VAL) \
7819 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7820
7821 if (info->executable)
7822 {
7823 if (!add_dynamic_entry (DT_DEBUG, 0))
7824 return FALSE;
7825 }
7826
7827 if (htab->plt != NULL && htab->plt->size != 0)
7828 {
7829 if (!add_dynamic_entry (DT_PLTGOT, 0)
7830 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7831 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7832 || !add_dynamic_entry (DT_JMPREL, 0)
7833 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7834 return FALSE;
7835 }
7836
7837 if (NO_OPD_RELOCS)
7838 {
7839 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7840 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7841 return FALSE;
7842 }
7843
7844 if (relocs)
7845 {
7846 if (!add_dynamic_entry (DT_RELA, 0)
7847 || !add_dynamic_entry (DT_RELASZ, 0)
7848 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7849 return FALSE;
7850
7851 /* If any dynamic relocs apply to a read-only section,
7852 then we need a DT_TEXTREL entry. */
7853 if ((info->flags & DF_TEXTREL) == 0)
7854 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7855
7856 if ((info->flags & DF_TEXTREL) != 0)
7857 {
7858 if (!add_dynamic_entry (DT_TEXTREL, 0))
7859 return FALSE;
7860 }
7861 }
7862 }
7863 #undef add_dynamic_entry
7864
7865 return TRUE;
7866 }
7867
7868 /* Determine the type of stub needed, if any, for a call. */
7869
7870 static inline enum ppc_stub_type
7871 ppc_type_of_stub (asection *input_sec,
7872 const Elf_Internal_Rela *rel,
7873 struct ppc_link_hash_entry **hash,
7874 bfd_vma destination)
7875 {
7876 struct ppc_link_hash_entry *h = *hash;
7877 bfd_vma location;
7878 bfd_vma branch_offset;
7879 bfd_vma max_branch_offset;
7880 enum elf_ppc64_reloc_type r_type;
7881
7882 if (h != NULL)
7883 {
7884 if (h->oh != NULL
7885 && h->oh->is_func_descriptor)
7886 h = h->oh;
7887
7888 if (h->elf.dynindx != -1)
7889 {
7890 struct plt_entry *ent;
7891
7892 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7893 if (ent->addend == rel->r_addend
7894 && ent->plt.offset != (bfd_vma) -1)
7895 {
7896 *hash = h;
7897 return ppc_stub_plt_call;
7898 }
7899 }
7900
7901 if (!(h->elf.root.type == bfd_link_hash_defined
7902 || h->elf.root.type == bfd_link_hash_defweak)
7903 || h->elf.root.u.def.section->output_section == NULL)
7904 return ppc_stub_none;
7905 }
7906
7907 /* Determine where the call point is. */
7908 location = (input_sec->output_offset
7909 + input_sec->output_section->vma
7910 + rel->r_offset);
7911
7912 branch_offset = destination - location;
7913 r_type = ELF64_R_TYPE (rel->r_info);
7914
7915 /* Determine if a long branch stub is needed. */
7916 max_branch_offset = 1 << 25;
7917 if (r_type != R_PPC64_REL24)
7918 max_branch_offset = 1 << 15;
7919
7920 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7921 /* We need a stub. Figure out whether a long_branch or plt_branch
7922 is needed later. */
7923 return ppc_stub_long_branch;
7924
7925 return ppc_stub_none;
7926 }
7927
7928 /* Build a .plt call stub. */
7929
7930 static inline bfd_byte *
7931 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7932 {
7933 #define PPC_LO(v) ((v) & 0xffff)
7934 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7935 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7936
7937 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7938 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7939 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7940 if (PPC_HA (offset + 8) != PPC_HA (offset))
7941 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7942 offset += 8;
7943 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7944 if (PPC_HA (offset + 8) != PPC_HA (offset))
7945 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7946 offset += 8;
7947 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7948 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7949 bfd_put_32 (obfd, BCTR, p), p += 4;
7950 return p;
7951 }
7952
7953 static bfd_boolean
7954 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7955 {
7956 struct ppc_stub_hash_entry *stub_entry;
7957 struct ppc_branch_hash_entry *br_entry;
7958 struct bfd_link_info *info;
7959 struct ppc_link_hash_table *htab;
7960 bfd_byte *loc;
7961 bfd_byte *p;
7962 unsigned int indx;
7963 struct plt_entry *ent;
7964 bfd_vma dest, off;
7965 int size;
7966
7967 /* Massage our args to the form they really have. */
7968 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7969 info = in_arg;
7970
7971 htab = ppc_hash_table (info);
7972
7973 /* Make a note of the offset within the stubs for this entry. */
7974 stub_entry->stub_offset = stub_entry->stub_sec->size;
7975 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7976
7977 htab->stub_count[stub_entry->stub_type - 1] += 1;
7978 switch (stub_entry->stub_type)
7979 {
7980 case ppc_stub_long_branch:
7981 case ppc_stub_long_branch_r2off:
7982 /* Branches are relative. This is where we are going to. */
7983 off = dest = (stub_entry->target_value
7984 + stub_entry->target_section->output_offset
7985 + stub_entry->target_section->output_section->vma);
7986
7987 /* And this is where we are coming from. */
7988 off -= (stub_entry->stub_offset
7989 + stub_entry->stub_sec->output_offset
7990 + stub_entry->stub_sec->output_section->vma);
7991
7992 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7993 size = 4;
7994 else
7995 {
7996 bfd_vma r2off;
7997
7998 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7999 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8000 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8001 loc += 4;
8002 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8003 loc += 4;
8004 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8005 loc += 4;
8006 off -= 12;
8007 size = 16;
8008 }
8009 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8010
8011 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
8012
8013 if (info->emitrelocations)
8014 {
8015 Elf_Internal_Rela *relocs, *r;
8016 struct bfd_elf_section_data *elfsec_data;
8017
8018 elfsec_data = elf_section_data (stub_entry->stub_sec);
8019 relocs = elfsec_data->relocs;
8020 if (relocs == NULL)
8021 {
8022 bfd_size_type relsize;
8023 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8024 relocs = bfd_alloc (htab->stub_bfd, relsize);
8025 if (relocs == NULL)
8026 return FALSE;
8027 elfsec_data->relocs = relocs;
8028 elfsec_data->rel_hdr.sh_size = relsize;
8029 elfsec_data->rel_hdr.sh_entsize = 24;
8030 stub_entry->stub_sec->reloc_count = 0;
8031 }
8032 r = relocs + stub_entry->stub_sec->reloc_count;
8033 stub_entry->stub_sec->reloc_count += 1;
8034 r->r_offset = loc - stub_entry->stub_sec->contents;
8035 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8036 r->r_addend = dest;
8037 if (stub_entry->h != NULL)
8038 {
8039 struct elf_link_hash_entry **hashes;
8040 unsigned long symndx;
8041 struct ppc_link_hash_entry *h;
8042
8043 hashes = elf_sym_hashes (htab->stub_bfd);
8044 if (hashes == NULL)
8045 {
8046 bfd_size_type hsize;
8047
8048 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8049 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8050 if (hashes == NULL)
8051 return FALSE;
8052 elf_sym_hashes (htab->stub_bfd) = hashes;
8053 htab->stub_globals = 1;
8054 }
8055 symndx = htab->stub_globals++;
8056 h = stub_entry->h;
8057 hashes[symndx] = &h->elf;
8058 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8059 if (h->oh != NULL && h->oh->is_func)
8060 h = h->oh;
8061 if (h->elf.root.u.def.section != stub_entry->target_section)
8062 /* H is an opd symbol. The addend must be zero. */
8063 r->r_addend = 0;
8064 else
8065 {
8066 off = (h->elf.root.u.def.value
8067 + h->elf.root.u.def.section->output_offset
8068 + h->elf.root.u.def.section->output_section->vma);
8069 r->r_addend -= off;
8070 }
8071 }
8072 }
8073 break;
8074
8075 case ppc_stub_plt_branch:
8076 case ppc_stub_plt_branch_r2off:
8077 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8078 stub_entry->root.string + 9,
8079 FALSE, FALSE);
8080 if (br_entry == NULL)
8081 {
8082 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8083 stub_entry->root.string + 9);
8084 htab->stub_error = TRUE;
8085 return FALSE;
8086 }
8087
8088 off = (stub_entry->target_value
8089 + stub_entry->target_section->output_offset
8090 + stub_entry->target_section->output_section->vma);
8091
8092 bfd_put_64 (htab->brlt->owner, off,
8093 htab->brlt->contents + br_entry->offset);
8094
8095 if (htab->relbrlt != NULL)
8096 {
8097 /* Create a reloc for the branch lookup table entry. */
8098 Elf_Internal_Rela rela;
8099 bfd_byte *rl;
8100
8101 rela.r_offset = (br_entry->offset
8102 + htab->brlt->output_offset
8103 + htab->brlt->output_section->vma);
8104 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8105 rela.r_addend = off;
8106
8107 rl = htab->relbrlt->contents;
8108 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8109 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8110 }
8111
8112 off = (br_entry->offset
8113 + htab->brlt->output_offset
8114 + htab->brlt->output_section->vma
8115 - elf_gp (htab->brlt->output_section->owner)
8116 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8117
8118 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8119 {
8120 (*_bfd_error_handler)
8121 (_("linkage table error against `%s'"),
8122 stub_entry->root.string);
8123 bfd_set_error (bfd_error_bad_value);
8124 htab->stub_error = TRUE;
8125 return FALSE;
8126 }
8127
8128 indx = off;
8129 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8130 {
8131 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8132 loc += 4;
8133 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8134 size = 16;
8135 }
8136 else
8137 {
8138 bfd_vma r2off;
8139
8140 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8141 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8142 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8143 loc += 4;
8144 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8145 loc += 4;
8146 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8147 loc += 4;
8148 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8149 loc += 4;
8150 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8151 size = 28;
8152 }
8153 loc += 4;
8154 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8155 loc += 4;
8156 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8157 break;
8158
8159 case ppc_stub_plt_call:
8160 /* Do the best we can for shared libraries built without
8161 exporting ".foo" for each "foo". This can happen when symbol
8162 versioning scripts strip all bar a subset of symbols. */
8163 if (stub_entry->h->oh != NULL
8164 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8165 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8166 {
8167 /* Point the symbol at the stub. There may be multiple stubs,
8168 we don't really care; The main thing is to make this sym
8169 defined somewhere. Maybe defining the symbol in the stub
8170 section is a silly idea. If we didn't do this, htab->top_id
8171 could disappear. */
8172 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8173 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8174 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8175 }
8176
8177 /* Now build the stub. */
8178 off = (bfd_vma) -1;
8179 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8180 if (ent->addend == stub_entry->addend)
8181 {
8182 off = ent->plt.offset;
8183 break;
8184 }
8185 if (off >= (bfd_vma) -2)
8186 abort ();
8187
8188 off &= ~ (bfd_vma) 1;
8189 off += (htab->plt->output_offset
8190 + htab->plt->output_section->vma
8191 - elf_gp (htab->plt->output_section->owner)
8192 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8193
8194 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8195 {
8196 (*_bfd_error_handler)
8197 (_("linkage table error against `%s'"),
8198 stub_entry->h->elf.root.root.string);
8199 bfd_set_error (bfd_error_bad_value);
8200 htab->stub_error = TRUE;
8201 return FALSE;
8202 }
8203
8204 p = build_plt_stub (htab->stub_bfd, loc, off);
8205 size = p - loc;
8206 break;
8207
8208 default:
8209 BFD_FAIL ();
8210 return FALSE;
8211 }
8212
8213 stub_entry->stub_sec->size += size;
8214
8215 if (htab->emit_stub_syms)
8216 {
8217 struct elf_link_hash_entry *h;
8218 size_t len1, len2;
8219 char *name;
8220 const char *const stub_str[] = { "long_branch",
8221 "long_branch_r2off",
8222 "plt_branch",
8223 "plt_branch_r2off",
8224 "plt_call" };
8225
8226 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8227 len2 = strlen (stub_entry->root.string);
8228 name = bfd_malloc (len1 + len2 + 2);
8229 if (name == NULL)
8230 return FALSE;
8231 memcpy (name, stub_entry->root.string, 9);
8232 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8233 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8234 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8235 if (h == NULL)
8236 return FALSE;
8237 if (h->root.type == bfd_link_hash_new)
8238 {
8239 h->root.type = bfd_link_hash_defined;
8240 h->root.u.def.section = stub_entry->stub_sec;
8241 h->root.u.def.value = stub_entry->stub_offset;
8242 h->ref_regular = 1;
8243 h->def_regular = 1;
8244 h->ref_regular_nonweak = 1;
8245 h->forced_local = 1;
8246 h->non_elf = 0;
8247 }
8248 }
8249
8250 return TRUE;
8251 }
8252
8253 /* As above, but don't actually build the stub. Just bump offset so
8254 we know stub section sizes, and select plt_branch stubs where
8255 long_branch stubs won't do. */
8256
8257 static bfd_boolean
8258 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8259 {
8260 struct ppc_stub_hash_entry *stub_entry;
8261 struct bfd_link_info *info;
8262 struct ppc_link_hash_table *htab;
8263 bfd_vma off;
8264 int size;
8265
8266 /* Massage our args to the form they really have. */
8267 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8268 info = in_arg;
8269
8270 htab = ppc_hash_table (info);
8271
8272 if (stub_entry->stub_type == ppc_stub_plt_call)
8273 {
8274 struct plt_entry *ent;
8275 off = (bfd_vma) -1;
8276 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8277 if (ent->addend == stub_entry->addend)
8278 {
8279 off = ent->plt.offset & ~(bfd_vma) 1;
8280 break;
8281 }
8282 if (off >= (bfd_vma) -2)
8283 abort ();
8284 off += (htab->plt->output_offset
8285 + htab->plt->output_section->vma
8286 - elf_gp (htab->plt->output_section->owner)
8287 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8288
8289 size = PLT_CALL_STUB_SIZE;
8290 if (PPC_HA (off + 16) != PPC_HA (off))
8291 size += 4;
8292 }
8293 else
8294 {
8295 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8296 variants. */
8297 off = (stub_entry->target_value
8298 + stub_entry->target_section->output_offset
8299 + stub_entry->target_section->output_section->vma);
8300 off -= (stub_entry->stub_sec->size
8301 + stub_entry->stub_sec->output_offset
8302 + stub_entry->stub_sec->output_section->vma);
8303
8304 /* Reset the stub type from the plt variant in case we now
8305 can reach with a shorter stub. */
8306 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8307 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8308
8309 size = 4;
8310 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8311 {
8312 off -= 12;
8313 size = 16;
8314 }
8315
8316 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8317 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8318 {
8319 struct ppc_branch_hash_entry *br_entry;
8320
8321 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8322 stub_entry->root.string + 9,
8323 TRUE, FALSE);
8324 if (br_entry == NULL)
8325 {
8326 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8327 stub_entry->root.string + 9);
8328 htab->stub_error = TRUE;
8329 return FALSE;
8330 }
8331
8332 if (br_entry->iter != htab->stub_iteration)
8333 {
8334 br_entry->iter = htab->stub_iteration;
8335 br_entry->offset = htab->brlt->size;
8336 htab->brlt->size += 8;
8337
8338 if (htab->relbrlt != NULL)
8339 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8340 }
8341
8342 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8343 size = 16;
8344 if (stub_entry->stub_type != ppc_stub_plt_branch)
8345 size = 28;
8346 }
8347
8348 if (info->emitrelocations
8349 && (stub_entry->stub_type == ppc_stub_long_branch
8350 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8351 stub_entry->stub_sec->reloc_count += 1;
8352 }
8353
8354 stub_entry->stub_sec->size += size;
8355 return TRUE;
8356 }
8357
8358 /* Set up various things so that we can make a list of input sections
8359 for each output section included in the link. Returns -1 on error,
8360 0 when no stubs will be needed, and 1 on success. */
8361
8362 int
8363 ppc64_elf_setup_section_lists (bfd *output_bfd,
8364 struct bfd_link_info *info,
8365 int no_multi_toc)
8366 {
8367 bfd *input_bfd;
8368 int top_id, top_index, id;
8369 asection *section;
8370 asection **input_list;
8371 bfd_size_type amt;
8372 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8373
8374 htab->no_multi_toc = no_multi_toc;
8375
8376 if (htab->brlt == NULL)
8377 return 0;
8378
8379 /* Find the top input section id. */
8380 for (input_bfd = info->input_bfds, top_id = 3;
8381 input_bfd != NULL;
8382 input_bfd = input_bfd->link_next)
8383 {
8384 for (section = input_bfd->sections;
8385 section != NULL;
8386 section = section->next)
8387 {
8388 if (top_id < section->id)
8389 top_id = section->id;
8390 }
8391 }
8392
8393 htab->top_id = top_id;
8394 amt = sizeof (struct map_stub) * (top_id + 1);
8395 htab->stub_group = bfd_zmalloc (amt);
8396 if (htab->stub_group == NULL)
8397 return -1;
8398
8399 /* Set toc_off for com, und, abs and ind sections. */
8400 for (id = 0; id < 3; id++)
8401 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8402
8403 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8404
8405 /* We can't use output_bfd->section_count here to find the top output
8406 section index as some sections may have been removed, and
8407 strip_excluded_output_sections doesn't renumber the indices. */
8408 for (section = output_bfd->sections, top_index = 0;
8409 section != NULL;
8410 section = section->next)
8411 {
8412 if (top_index < section->index)
8413 top_index = section->index;
8414 }
8415
8416 htab->top_index = top_index;
8417 amt = sizeof (asection *) * (top_index + 1);
8418 input_list = bfd_zmalloc (amt);
8419 htab->input_list = input_list;
8420 if (input_list == NULL)
8421 return -1;
8422
8423 return 1;
8424 }
8425
8426 /* The linker repeatedly calls this function for each TOC input section
8427 and linker generated GOT section. Group input bfds such that the toc
8428 within a group is less than 64k in size. Will break with cute linker
8429 scripts that play games with dot in the output toc section. */
8430
8431 void
8432 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8433 {
8434 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8435
8436 if (!htab->no_multi_toc)
8437 {
8438 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8439 bfd_vma off = addr - htab->toc_curr;
8440
8441 if (off + isec->size > 0x10000)
8442 htab->toc_curr = addr;
8443
8444 elf_gp (isec->owner) = (htab->toc_curr
8445 - elf_gp (isec->output_section->owner)
8446 + TOC_BASE_OFF);
8447 }
8448 }
8449
8450 /* Called after the last call to the above function. */
8451
8452 void
8453 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8454 {
8455 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8456
8457 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8458
8459 /* toc_curr tracks the TOC offset used for code sections below in
8460 ppc64_elf_next_input_section. Start off at 0x8000. */
8461 htab->toc_curr = TOC_BASE_OFF;
8462 }
8463
8464 /* No toc references were found in ISEC. If the code in ISEC makes no
8465 calls, then there's no need to use toc adjusting stubs when branching
8466 into ISEC. Actually, indirect calls from ISEC are OK as they will
8467 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8468 needed, and 2 if a cyclical call-graph was found but no other reason
8469 for a stub was detected. If called from the top level, a return of
8470 2 means the same as a return of 0. */
8471
8472 static int
8473 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8474 {
8475 Elf_Internal_Rela *relstart, *rel;
8476 Elf_Internal_Sym *local_syms;
8477 int ret;
8478 struct ppc_link_hash_table *htab;
8479
8480 /* We know none of our code bearing sections will need toc stubs. */
8481 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8482 return 0;
8483
8484 if (isec->size == 0)
8485 return 0;
8486
8487 if (isec->output_section == NULL)
8488 return 0;
8489
8490 /* Hack for linux kernel. .fixup contains branches, but only back to
8491 the function that hit an exception. */
8492 if (strcmp (isec->name, ".fixup") == 0)
8493 return 0;
8494
8495 if (isec->reloc_count == 0)
8496 return 0;
8497
8498 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8499 info->keep_memory);
8500 if (relstart == NULL)
8501 return -1;
8502
8503 /* Look for branches to outside of this section. */
8504 local_syms = NULL;
8505 ret = 0;
8506 htab = ppc_hash_table (info);
8507 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8508 {
8509 enum elf_ppc64_reloc_type r_type;
8510 unsigned long r_symndx;
8511 struct elf_link_hash_entry *h;
8512 Elf_Internal_Sym *sym;
8513 asection *sym_sec;
8514 long *opd_adjust;
8515 bfd_vma sym_value;
8516 bfd_vma dest;
8517
8518 r_type = ELF64_R_TYPE (rel->r_info);
8519 if (r_type != R_PPC64_REL24
8520 && r_type != R_PPC64_REL14
8521 && r_type != R_PPC64_REL14_BRTAKEN
8522 && r_type != R_PPC64_REL14_BRNTAKEN)
8523 continue;
8524
8525 r_symndx = ELF64_R_SYM (rel->r_info);
8526 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8527 isec->owner))
8528 {
8529 ret = -1;
8530 break;
8531 }
8532
8533 /* Calls to dynamic lib functions go through a plt call stub
8534 that uses r2. Branches to undefined symbols might be a call
8535 using old-style dot symbols that can be satisfied by a plt
8536 call into a new-style dynamic library. */
8537 if (sym_sec == NULL)
8538 {
8539 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8540 if (eh != NULL
8541 && eh->oh != NULL
8542 && eh->oh->elf.plt.plist != NULL)
8543 {
8544 ret = 1;
8545 break;
8546 }
8547
8548 /* Ignore other undefined symbols. */
8549 continue;
8550 }
8551
8552 /* Assume branches to other sections not included in the link need
8553 stubs too, to cover -R and absolute syms. */
8554 if (sym_sec->output_section == NULL)
8555 {
8556 ret = 1;
8557 break;
8558 }
8559
8560 if (h == NULL)
8561 sym_value = sym->st_value;
8562 else
8563 {
8564 if (h->root.type != bfd_link_hash_defined
8565 && h->root.type != bfd_link_hash_defweak)
8566 abort ();
8567 sym_value = h->root.u.def.value;
8568 }
8569 sym_value += rel->r_addend;
8570
8571 /* If this branch reloc uses an opd sym, find the code section. */
8572 opd_adjust = get_opd_info (sym_sec);
8573 if (opd_adjust != NULL)
8574 {
8575 if (h == NULL)
8576 {
8577 long adjust;
8578
8579 adjust = opd_adjust[sym->st_value / 8];
8580 if (adjust == -1)
8581 /* Assume deleted functions won't ever be called. */
8582 continue;
8583 sym_value += adjust;
8584 }
8585
8586 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8587 if (dest == (bfd_vma) -1)
8588 continue;
8589 }
8590 else
8591 dest = (sym_value
8592 + sym_sec->output_offset
8593 + sym_sec->output_section->vma);
8594
8595 /* Ignore branch to self. */
8596 if (sym_sec == isec)
8597 continue;
8598
8599 /* If the called function uses the toc, we need a stub. */
8600 if (sym_sec->has_toc_reloc
8601 || sym_sec->makes_toc_func_call)
8602 {
8603 ret = 1;
8604 break;
8605 }
8606
8607 /* Assume any branch that needs a long branch stub might in fact
8608 need a plt_branch stub. A plt_branch stub uses r2. */
8609 else if (dest - (isec->output_offset
8610 + isec->output_section->vma
8611 + rel->r_offset) + (1 << 25) >= (2 << 25))
8612 {
8613 ret = 1;
8614 break;
8615 }
8616
8617 /* If calling back to a section in the process of being tested, we
8618 can't say for sure that no toc adjusting stubs are needed, so
8619 don't return zero. */
8620 else if (sym_sec->call_check_in_progress)
8621 ret = 2;
8622
8623 /* Branches to another section that itself doesn't have any TOC
8624 references are OK. Recursively call ourselves to check. */
8625 else if (sym_sec->id <= htab->top_id
8626 && htab->stub_group[sym_sec->id].toc_off == 0)
8627 {
8628 int recur;
8629
8630 /* Mark current section as indeterminate, so that other
8631 sections that call back to current won't be marked as
8632 known. */
8633 isec->call_check_in_progress = 1;
8634 recur = toc_adjusting_stub_needed (info, sym_sec);
8635 isec->call_check_in_progress = 0;
8636
8637 if (recur < 0)
8638 {
8639 /* An error. Exit. */
8640 ret = -1;
8641 break;
8642 }
8643 else if (recur <= 1)
8644 {
8645 /* Known result. Mark as checked and set section flag. */
8646 htab->stub_group[sym_sec->id].toc_off = 1;
8647 if (recur != 0)
8648 {
8649 sym_sec->makes_toc_func_call = 1;
8650 ret = 1;
8651 break;
8652 }
8653 }
8654 else
8655 {
8656 /* Unknown result. Continue checking. */
8657 ret = 2;
8658 }
8659 }
8660 }
8661
8662 if (local_syms != NULL
8663 && (elf_tdata (isec->owner)->symtab_hdr.contents
8664 != (unsigned char *) local_syms))
8665 free (local_syms);
8666 if (elf_section_data (isec)->relocs != relstart)
8667 free (relstart);
8668
8669 return ret;
8670 }
8671
8672 /* The linker repeatedly calls this function for each input section,
8673 in the order that input sections are linked into output sections.
8674 Build lists of input sections to determine groupings between which
8675 we may insert linker stubs. */
8676
8677 bfd_boolean
8678 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8679 {
8680 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8681
8682 if ((isec->output_section->flags & SEC_CODE) != 0
8683 && isec->output_section->index <= htab->top_index)
8684 {
8685 asection **list = htab->input_list + isec->output_section->index;
8686 /* Steal the link_sec pointer for our list. */
8687 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8688 /* This happens to make the list in reverse order,
8689 which is what we want. */
8690 PREV_SEC (isec) = *list;
8691 *list = isec;
8692 }
8693
8694 if (htab->multi_toc_needed)
8695 {
8696 /* If a code section has a function that uses the TOC then we need
8697 to use the right TOC (obviously). Also, make sure that .opd gets
8698 the correct TOC value for R_PPC64_TOC relocs that don't have or
8699 can't find their function symbol (shouldn't ever happen now). */
8700 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8701 {
8702 if (elf_gp (isec->owner) != 0)
8703 htab->toc_curr = elf_gp (isec->owner);
8704 }
8705 else if (htab->stub_group[isec->id].toc_off == 0)
8706 {
8707 int ret = toc_adjusting_stub_needed (info, isec);
8708 if (ret < 0)
8709 return FALSE;
8710 else
8711 isec->makes_toc_func_call = ret & 1;
8712 }
8713 }
8714
8715 /* Functions that don't use the TOC can belong in any TOC group.
8716 Use the last TOC base. This happens to make _init and _fini
8717 pasting work. */
8718 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8719 return TRUE;
8720 }
8721
8722 /* See whether we can group stub sections together. Grouping stub
8723 sections may result in fewer stubs. More importantly, we need to
8724 put all .init* and .fini* stubs at the beginning of the .init or
8725 .fini output sections respectively, because glibc splits the
8726 _init and _fini functions into multiple parts. Putting a stub in
8727 the middle of a function is not a good idea. */
8728
8729 static void
8730 group_sections (struct ppc_link_hash_table *htab,
8731 bfd_size_type stub_group_size,
8732 bfd_boolean stubs_always_before_branch)
8733 {
8734 asection **list = htab->input_list + htab->top_index;
8735 do
8736 {
8737 asection *tail = *list;
8738 while (tail != NULL)
8739 {
8740 asection *curr;
8741 asection *prev;
8742 bfd_size_type total;
8743 bfd_boolean big_sec;
8744 bfd_vma curr_toc;
8745
8746 curr = tail;
8747 total = tail->size;
8748 big_sec = total >= stub_group_size;
8749 curr_toc = htab->stub_group[tail->id].toc_off;
8750
8751 while ((prev = PREV_SEC (curr)) != NULL
8752 && ((total += curr->output_offset - prev->output_offset)
8753 < stub_group_size)
8754 && htab->stub_group[prev->id].toc_off == curr_toc)
8755 curr = prev;
8756
8757 /* OK, the size from the start of CURR to the end is less
8758 than stub_group_size and thus can be handled by one stub
8759 section. (or the tail section is itself larger than
8760 stub_group_size, in which case we may be toast.) We
8761 should really be keeping track of the total size of stubs
8762 added here, as stubs contribute to the final output
8763 section size. That's a little tricky, and this way will
8764 only break if stubs added make the total size more than
8765 2^25, ie. for the default stub_group_size, if stubs total
8766 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8767 do
8768 {
8769 prev = PREV_SEC (tail);
8770 /* Set up this stub group. */
8771 htab->stub_group[tail->id].link_sec = curr;
8772 }
8773 while (tail != curr && (tail = prev) != NULL);
8774
8775 /* But wait, there's more! Input sections up to stub_group_size
8776 bytes before the stub section can be handled by it too.
8777 Don't do this if we have a really large section after the
8778 stubs, as adding more stubs increases the chance that
8779 branches may not reach into the stub section. */
8780 if (!stubs_always_before_branch && !big_sec)
8781 {
8782 total = 0;
8783 while (prev != NULL
8784 && ((total += tail->output_offset - prev->output_offset)
8785 < stub_group_size)
8786 && htab->stub_group[prev->id].toc_off == curr_toc)
8787 {
8788 tail = prev;
8789 prev = PREV_SEC (tail);
8790 htab->stub_group[tail->id].link_sec = curr;
8791 }
8792 }
8793 tail = prev;
8794 }
8795 }
8796 while (list-- != htab->input_list);
8797 free (htab->input_list);
8798 #undef PREV_SEC
8799 }
8800
8801 /* Determine and set the size of the stub section for a final link.
8802
8803 The basic idea here is to examine all the relocations looking for
8804 PC-relative calls to a target that is unreachable with a "bl"
8805 instruction. */
8806
8807 bfd_boolean
8808 ppc64_elf_size_stubs (bfd *output_bfd,
8809 struct bfd_link_info *info,
8810 bfd_signed_vma group_size,
8811 asection *(*add_stub_section) (const char *, asection *),
8812 void (*layout_sections_again) (void))
8813 {
8814 bfd_size_type stub_group_size;
8815 bfd_boolean stubs_always_before_branch;
8816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8817
8818 /* Stash our params away. */
8819 htab->add_stub_section = add_stub_section;
8820 htab->layout_sections_again = layout_sections_again;
8821 stubs_always_before_branch = group_size < 0;
8822 if (group_size < 0)
8823 stub_group_size = -group_size;
8824 else
8825 stub_group_size = group_size;
8826 if (stub_group_size == 1)
8827 {
8828 /* Default values. */
8829 if (stubs_always_before_branch)
8830 {
8831 stub_group_size = 0x1e00000;
8832 if (htab->has_14bit_branch)
8833 stub_group_size = 0x7800;
8834 }
8835 else
8836 {
8837 stub_group_size = 0x1c00000;
8838 if (htab->has_14bit_branch)
8839 stub_group_size = 0x7000;
8840 }
8841 }
8842
8843 group_sections (htab, stub_group_size, stubs_always_before_branch);
8844
8845 while (1)
8846 {
8847 bfd *input_bfd;
8848 unsigned int bfd_indx;
8849 asection *stub_sec;
8850 bfd_boolean stub_changed;
8851
8852 htab->stub_iteration += 1;
8853 stub_changed = FALSE;
8854
8855 for (input_bfd = info->input_bfds, bfd_indx = 0;
8856 input_bfd != NULL;
8857 input_bfd = input_bfd->link_next, bfd_indx++)
8858 {
8859 Elf_Internal_Shdr *symtab_hdr;
8860 asection *section;
8861 Elf_Internal_Sym *local_syms = NULL;
8862
8863 /* We'll need the symbol table in a second. */
8864 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8865 if (symtab_hdr->sh_info == 0)
8866 continue;
8867
8868 /* Walk over each section attached to the input bfd. */
8869 for (section = input_bfd->sections;
8870 section != NULL;
8871 section = section->next)
8872 {
8873 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8874
8875 /* If there aren't any relocs, then there's nothing more
8876 to do. */
8877 if ((section->flags & SEC_RELOC) == 0
8878 || section->reloc_count == 0)
8879 continue;
8880
8881 /* If this section is a link-once section that will be
8882 discarded, then don't create any stubs. */
8883 if (section->output_section == NULL
8884 || section->output_section->owner != output_bfd)
8885 continue;
8886
8887 /* Get the relocs. */
8888 internal_relocs
8889 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8890 info->keep_memory);
8891 if (internal_relocs == NULL)
8892 goto error_ret_free_local;
8893
8894 /* Now examine each relocation. */
8895 irela = internal_relocs;
8896 irelaend = irela + section->reloc_count;
8897 for (; irela < irelaend; irela++)
8898 {
8899 enum elf_ppc64_reloc_type r_type;
8900 unsigned int r_indx;
8901 enum ppc_stub_type stub_type;
8902 struct ppc_stub_hash_entry *stub_entry;
8903 asection *sym_sec, *code_sec;
8904 bfd_vma sym_value;
8905 bfd_vma destination;
8906 bfd_boolean ok_dest;
8907 struct ppc_link_hash_entry *hash;
8908 struct ppc_link_hash_entry *fdh;
8909 struct elf_link_hash_entry *h;
8910 Elf_Internal_Sym *sym;
8911 char *stub_name;
8912 const asection *id_sec;
8913 long *opd_adjust;
8914
8915 r_type = ELF64_R_TYPE (irela->r_info);
8916 r_indx = ELF64_R_SYM (irela->r_info);
8917
8918 if (r_type >= R_PPC64_max)
8919 {
8920 bfd_set_error (bfd_error_bad_value);
8921 goto error_ret_free_internal;
8922 }
8923
8924 /* Only look for stubs on branch instructions. */
8925 if (r_type != R_PPC64_REL24
8926 && r_type != R_PPC64_REL14
8927 && r_type != R_PPC64_REL14_BRTAKEN
8928 && r_type != R_PPC64_REL14_BRNTAKEN)
8929 continue;
8930
8931 /* Now determine the call target, its name, value,
8932 section. */
8933 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8934 r_indx, input_bfd))
8935 goto error_ret_free_internal;
8936 hash = (struct ppc_link_hash_entry *) h;
8937
8938 ok_dest = FALSE;
8939 fdh = NULL;
8940 if (hash == NULL)
8941 {
8942 sym_value = sym->st_value;
8943 ok_dest = TRUE;
8944 }
8945 else
8946 {
8947 sym_value = 0;
8948 /* Recognise an old ABI func code entry sym, and
8949 use the func descriptor sym instead. */
8950 if (hash->elf.root.root.string[0] == '.'
8951 && (fdh = get_fdh (hash, htab)) != NULL)
8952 {
8953 if (fdh->elf.root.type == bfd_link_hash_defined
8954 || fdh->elf.root.type == bfd_link_hash_defweak)
8955 {
8956 sym_sec = fdh->elf.root.u.def.section;
8957 sym_value = fdh->elf.root.u.def.value;
8958 if (sym_sec->output_section != NULL)
8959 ok_dest = TRUE;
8960 }
8961 else
8962 fdh = NULL;
8963 }
8964 else if (hash->elf.root.type == bfd_link_hash_defined
8965 || hash->elf.root.type == bfd_link_hash_defweak)
8966 {
8967 sym_value = hash->elf.root.u.def.value;
8968 if (sym_sec->output_section != NULL)
8969 ok_dest = TRUE;
8970 }
8971 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8972 ;
8973 else if (hash->elf.root.type == bfd_link_hash_undefined)
8974 ;
8975 else
8976 {
8977 bfd_set_error (bfd_error_bad_value);
8978 goto error_ret_free_internal;
8979 }
8980 }
8981
8982 destination = 0;
8983 if (ok_dest)
8984 {
8985 sym_value += irela->r_addend;
8986 destination = (sym_value
8987 + sym_sec->output_offset
8988 + sym_sec->output_section->vma);
8989 }
8990
8991 code_sec = sym_sec;
8992 opd_adjust = get_opd_info (sym_sec);
8993 if (opd_adjust != NULL)
8994 {
8995 bfd_vma dest;
8996
8997 if (hash == NULL)
8998 {
8999 long adjust = opd_adjust[sym_value / 8];
9000 if (adjust == -1)
9001 continue;
9002 sym_value += adjust;
9003 }
9004 dest = opd_entry_value (sym_sec, sym_value,
9005 &code_sec, &sym_value);
9006 if (dest != (bfd_vma) -1)
9007 {
9008 destination = dest;
9009 if (fdh != NULL)
9010 {
9011 /* Fixup old ABI sym to point at code
9012 entry. */
9013 hash->elf.root.type = bfd_link_hash_defweak;
9014 hash->elf.root.u.def.section = code_sec;
9015 hash->elf.root.u.def.value = sym_value;
9016 }
9017 }
9018 }
9019
9020 /* Determine what (if any) linker stub is needed. */
9021 stub_type = ppc_type_of_stub (section, irela, &hash,
9022 destination);
9023
9024 if (stub_type != ppc_stub_plt_call)
9025 {
9026 /* Check whether we need a TOC adjusting stub.
9027 Since the linker pastes together pieces from
9028 different object files when creating the
9029 _init and _fini functions, it may be that a
9030 call to what looks like a local sym is in
9031 fact a call needing a TOC adjustment. */
9032 if (code_sec != NULL
9033 && code_sec->output_section != NULL
9034 && (htab->stub_group[code_sec->id].toc_off
9035 != htab->stub_group[section->id].toc_off)
9036 && (code_sec->has_toc_reloc
9037 || code_sec->makes_toc_func_call))
9038 stub_type = ppc_stub_long_branch_r2off;
9039 }
9040
9041 if (stub_type == ppc_stub_none)
9042 continue;
9043
9044 /* __tls_get_addr calls might be eliminated. */
9045 if (stub_type != ppc_stub_plt_call
9046 && hash != NULL
9047 && (hash == htab->tls_get_addr
9048 || hash == htab->tls_get_addr_fd)
9049 && section->has_tls_reloc
9050 && irela != internal_relocs)
9051 {
9052 /* Get tls info. */
9053 char *tls_mask;
9054
9055 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9056 irela - 1, input_bfd))
9057 goto error_ret_free_internal;
9058 if (*tls_mask != 0)
9059 continue;
9060 }
9061
9062 /* Support for grouping stub sections. */
9063 id_sec = htab->stub_group[section->id].link_sec;
9064
9065 /* Get the name of this stub. */
9066 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9067 if (!stub_name)
9068 goto error_ret_free_internal;
9069
9070 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9071 stub_name, FALSE, FALSE);
9072 if (stub_entry != NULL)
9073 {
9074 /* The proper stub has already been created. */
9075 free (stub_name);
9076 continue;
9077 }
9078
9079 stub_entry = ppc_add_stub (stub_name, section, htab);
9080 if (stub_entry == NULL)
9081 {
9082 free (stub_name);
9083 error_ret_free_internal:
9084 if (elf_section_data (section)->relocs == NULL)
9085 free (internal_relocs);
9086 error_ret_free_local:
9087 if (local_syms != NULL
9088 && (symtab_hdr->contents
9089 != (unsigned char *) local_syms))
9090 free (local_syms);
9091 return FALSE;
9092 }
9093
9094 stub_entry->stub_type = stub_type;
9095 stub_entry->target_value = sym_value;
9096 stub_entry->target_section = code_sec;
9097 stub_entry->h = hash;
9098 stub_entry->addend = irela->r_addend;
9099
9100 if (stub_entry->h != NULL)
9101 htab->stub_globals += 1;
9102
9103 stub_changed = TRUE;
9104 }
9105
9106 /* We're done with the internal relocs, free them. */
9107 if (elf_section_data (section)->relocs != internal_relocs)
9108 free (internal_relocs);
9109 }
9110
9111 if (local_syms != NULL
9112 && symtab_hdr->contents != (unsigned char *) local_syms)
9113 {
9114 if (!info->keep_memory)
9115 free (local_syms);
9116 else
9117 symtab_hdr->contents = (unsigned char *) local_syms;
9118 }
9119 }
9120
9121 if (!stub_changed)
9122 break;
9123
9124 /* OK, we've added some stubs. Find out the new size of the
9125 stub sections. */
9126 for (stub_sec = htab->stub_bfd->sections;
9127 stub_sec != NULL;
9128 stub_sec = stub_sec->next)
9129 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9130 {
9131 stub_sec->size = 0;
9132 stub_sec->reloc_count = 0;
9133 }
9134
9135 htab->brlt->size = 0;
9136 if (htab->relbrlt != NULL)
9137 htab->relbrlt->size = 0;
9138
9139 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9140
9141 /* Ask the linker to do its stuff. */
9142 (*htab->layout_sections_again) ();
9143 }
9144
9145 /* It would be nice to strip htab->brlt from the output if the
9146 section is empty, but it's too late. If we strip sections here,
9147 the dynamic symbol table is corrupted since the section symbol
9148 for the stripped section isn't written. */
9149
9150 return TRUE;
9151 }
9152
9153 /* Called after we have determined section placement. If sections
9154 move, we'll be called again. Provide a value for TOCstart. */
9155
9156 bfd_vma
9157 ppc64_elf_toc (bfd *obfd)
9158 {
9159 asection *s;
9160 bfd_vma TOCstart;
9161
9162 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9163 order. The TOC starts where the first of these sections starts. */
9164 s = bfd_get_section_by_name (obfd, ".got");
9165 if (s == NULL)
9166 s = bfd_get_section_by_name (obfd, ".toc");
9167 if (s == NULL)
9168 s = bfd_get_section_by_name (obfd, ".tocbss");
9169 if (s == NULL)
9170 s = bfd_get_section_by_name (obfd, ".plt");
9171 if (s == NULL)
9172 {
9173 /* This may happen for
9174 o references to TOC base (SYM@toc / TOC[tc0]) without a
9175 .toc directive
9176 o bad linker script
9177 o --gc-sections and empty TOC sections
9178
9179 FIXME: Warn user? */
9180
9181 /* Look for a likely section. We probably won't even be
9182 using TOCstart. */
9183 for (s = obfd->sections; s != NULL; s = s->next)
9184 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9185 == (SEC_ALLOC | SEC_SMALL_DATA))
9186 break;
9187 if (s == NULL)
9188 for (s = obfd->sections; s != NULL; s = s->next)
9189 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9190 == (SEC_ALLOC | SEC_SMALL_DATA))
9191 break;
9192 if (s == NULL)
9193 for (s = obfd->sections; s != NULL; s = s->next)
9194 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9195 break;
9196 if (s == NULL)
9197 for (s = obfd->sections; s != NULL; s = s->next)
9198 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9199 break;
9200 }
9201
9202 TOCstart = 0;
9203 if (s != NULL)
9204 TOCstart = s->output_section->vma + s->output_offset;
9205
9206 return TOCstart;
9207 }
9208
9209 /* Build all the stubs associated with the current output file.
9210 The stubs are kept in a hash table attached to the main linker
9211 hash table. This function is called via gldelf64ppc_finish. */
9212
9213 bfd_boolean
9214 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9215 struct bfd_link_info *info,
9216 char **stats)
9217 {
9218 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9219 asection *stub_sec;
9220 bfd_byte *p;
9221 int stub_sec_count = 0;
9222
9223 htab->emit_stub_syms = emit_stub_syms;
9224
9225 /* Allocate memory to hold the linker stubs. */
9226 for (stub_sec = htab->stub_bfd->sections;
9227 stub_sec != NULL;
9228 stub_sec = stub_sec->next)
9229 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9230 && stub_sec->size != 0)
9231 {
9232 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9233 if (stub_sec->contents == NULL)
9234 return FALSE;
9235 /* We want to check that built size is the same as calculated
9236 size. rawsize is a convenient location to use. */
9237 stub_sec->rawsize = stub_sec->size;
9238 stub_sec->size = 0;
9239 }
9240
9241 if (htab->plt != NULL)
9242 {
9243 unsigned int indx;
9244 bfd_vma plt0;
9245
9246 /* Build the .glink plt call stub. */
9247 plt0 = (htab->plt->output_section->vma
9248 + htab->plt->output_offset
9249 - (htab->glink->output_section->vma
9250 + htab->glink->output_offset
9251 + GLINK_CALL_STUB_SIZE));
9252 if (plt0 + 0x80008000 > 0xffffffff)
9253 {
9254 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9255 bfd_set_error (bfd_error_bad_value);
9256 return FALSE;
9257 }
9258
9259 if (htab->emit_stub_syms)
9260 {
9261 struct elf_link_hash_entry *h;
9262 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9263 if (h == NULL)
9264 return FALSE;
9265 if (h->root.type == bfd_link_hash_new)
9266 {
9267 h->root.type = bfd_link_hash_defined;
9268 h->root.u.def.section = htab->glink;
9269 h->root.u.def.value = 0;
9270 h->ref_regular = 1;
9271 h->def_regular = 1;
9272 h->ref_regular_nonweak = 1;
9273 h->forced_local = 1;
9274 h->non_elf = 0;
9275 }
9276 }
9277 p = htab->glink->contents;
9278 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9279 p += 4;
9280 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9281 p += 4;
9282 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9283 p += 4;
9284 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9285 p += 4;
9286 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9287 p += 4;
9288 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9289 p += 4;
9290 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9291 p += 4;
9292 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9293 p += 4;
9294 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9295 p += 4;
9296 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9297 p += 4;
9298 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9299 p += 4;
9300 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9301 p += 4;
9302 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9303 p += 4;
9304 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9305 p += 4;
9306 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9307 p += 4;
9308 bfd_put_32 (htab->glink->owner, BCTR, p);
9309 p += 4;
9310
9311 /* Build the .glink lazy link call stubs. */
9312 indx = 0;
9313 while (p < htab->glink->contents + htab->glink->size)
9314 {
9315 if (indx < 0x8000)
9316 {
9317 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9318 p += 4;
9319 }
9320 else
9321 {
9322 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9323 p += 4;
9324 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9325 p += 4;
9326 }
9327 bfd_put_32 (htab->glink->owner,
9328 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9329 indx++;
9330 p += 4;
9331 }
9332 htab->glink->rawsize = p - htab->glink->contents;
9333 }
9334
9335 if (htab->brlt->size != 0)
9336 {
9337 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9338 htab->brlt->size);
9339 if (htab->brlt->contents == NULL)
9340 return FALSE;
9341 }
9342 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9343 {
9344 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9345 htab->relbrlt->size);
9346 if (htab->relbrlt->contents == NULL)
9347 return FALSE;
9348 }
9349
9350 /* Build the stubs as directed by the stub hash table. */
9351 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9352
9353 for (stub_sec = htab->stub_bfd->sections;
9354 stub_sec != NULL;
9355 stub_sec = stub_sec->next)
9356 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9357 {
9358 stub_sec_count += 1;
9359 if (stub_sec->rawsize != stub_sec->size)
9360 break;
9361 }
9362
9363 if (stub_sec != NULL
9364 || htab->glink->rawsize != htab->glink->size)
9365 {
9366 htab->stub_error = TRUE;
9367 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9368 }
9369
9370 if (htab->stub_error)
9371 return FALSE;
9372
9373 if (stats != NULL)
9374 {
9375 *stats = bfd_malloc (500);
9376 if (*stats == NULL)
9377 return FALSE;
9378
9379 sprintf (*stats, _("linker stubs in %u group%s\n"
9380 " branch %lu\n"
9381 " toc adjust %lu\n"
9382 " long branch %lu\n"
9383 " long toc adj %lu\n"
9384 " plt call %lu"),
9385 stub_sec_count,
9386 stub_sec_count == 1 ? "" : "s",
9387 htab->stub_count[ppc_stub_long_branch - 1],
9388 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9389 htab->stub_count[ppc_stub_plt_branch - 1],
9390 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9391 htab->stub_count[ppc_stub_plt_call - 1]);
9392 }
9393 return TRUE;
9394 }
9395
9396 /* This function undoes the changes made by add_symbol_adjust. */
9397
9398 static bfd_boolean
9399 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9400 {
9401 struct ppc_link_hash_entry *eh;
9402
9403 if (h->root.type == bfd_link_hash_indirect)
9404 return TRUE;
9405
9406 if (h->root.type == bfd_link_hash_warning)
9407 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9408
9409 eh = (struct ppc_link_hash_entry *) h;
9410 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9411 return TRUE;
9412
9413 eh->elf.root.type = bfd_link_hash_undefined;
9414 return TRUE;
9415 }
9416
9417 void
9418 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9419 {
9420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9421 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9422 }
9423
9424 /* The RELOCATE_SECTION function is called by the ELF backend linker
9425 to handle the relocations for a section.
9426
9427 The relocs are always passed as Rela structures; if the section
9428 actually uses Rel structures, the r_addend field will always be
9429 zero.
9430
9431 This function is responsible for adjust the section contents as
9432 necessary, and (if using Rela relocs and generating a
9433 relocatable output file) adjusting the reloc addend as
9434 necessary.
9435
9436 This function does not have to worry about setting the reloc
9437 address or the reloc symbol index.
9438
9439 LOCAL_SYMS is a pointer to the swapped in local symbols.
9440
9441 LOCAL_SECTIONS is an array giving the section in the input file
9442 corresponding to the st_shndx field of each local symbol.
9443
9444 The global hash table entry for the global symbols can be found
9445 via elf_sym_hashes (input_bfd).
9446
9447 When generating relocatable output, this function must handle
9448 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9449 going to be the section symbol corresponding to the output
9450 section, which means that the addend must be adjusted
9451 accordingly. */
9452
9453 static bfd_boolean
9454 ppc64_elf_relocate_section (bfd *output_bfd,
9455 struct bfd_link_info *info,
9456 bfd *input_bfd,
9457 asection *input_section,
9458 bfd_byte *contents,
9459 Elf_Internal_Rela *relocs,
9460 Elf_Internal_Sym *local_syms,
9461 asection **local_sections)
9462 {
9463 struct ppc_link_hash_table *htab;
9464 Elf_Internal_Shdr *symtab_hdr;
9465 struct elf_link_hash_entry **sym_hashes;
9466 Elf_Internal_Rela *rel;
9467 Elf_Internal_Rela *relend;
9468 Elf_Internal_Rela outrel;
9469 bfd_byte *loc;
9470 struct got_entry **local_got_ents;
9471 bfd_vma TOCstart;
9472 bfd_boolean ret = TRUE;
9473 bfd_boolean is_opd;
9474 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9475 bfd_boolean is_power4 = FALSE;
9476
9477 if (info->relocatable)
9478 return TRUE;
9479
9480 /* Initialize howto table if needed. */
9481 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9482 ppc_howto_init ();
9483
9484 htab = ppc_hash_table (info);
9485
9486 /* Don't relocate stub sections. */
9487 if (input_section->owner == htab->stub_bfd)
9488 return TRUE;
9489
9490 local_got_ents = elf_local_got_ents (input_bfd);
9491 TOCstart = elf_gp (output_bfd);
9492 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9493 sym_hashes = elf_sym_hashes (input_bfd);
9494 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9495
9496 rel = relocs;
9497 relend = relocs + input_section->reloc_count;
9498 for (; rel < relend; rel++)
9499 {
9500 enum elf_ppc64_reloc_type r_type;
9501 bfd_vma addend;
9502 bfd_reloc_status_type r;
9503 Elf_Internal_Sym *sym;
9504 asection *sec;
9505 struct elf_link_hash_entry *h_elf;
9506 struct ppc_link_hash_entry *h;
9507 struct ppc_link_hash_entry *fdh;
9508 const char *sym_name;
9509 unsigned long r_symndx, toc_symndx;
9510 char tls_mask, tls_gd, tls_type;
9511 char sym_type;
9512 bfd_vma relocation;
9513 bfd_boolean unresolved_reloc;
9514 bfd_boolean warned;
9515 unsigned long insn, mask;
9516 struct ppc_stub_hash_entry *stub_entry;
9517 bfd_vma max_br_offset;
9518 bfd_vma from;
9519
9520 r_type = ELF64_R_TYPE (rel->r_info);
9521 r_symndx = ELF64_R_SYM (rel->r_info);
9522
9523 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9524 symbol of the previous ADDR64 reloc. The symbol gives us the
9525 proper TOC base to use. */
9526 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9527 && rel != relocs
9528 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9529 && is_opd)
9530 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9531
9532 sym = NULL;
9533 sec = NULL;
9534 h_elf = NULL;
9535 sym_name = NULL;
9536 unresolved_reloc = FALSE;
9537 warned = FALSE;
9538
9539 if (r_symndx < symtab_hdr->sh_info)
9540 {
9541 /* It's a local symbol. */
9542 long *opd_adjust;
9543
9544 sym = local_syms + r_symndx;
9545 sec = local_sections[r_symndx];
9546 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9547 sym_type = ELF64_ST_TYPE (sym->st_info);
9548 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9549 opd_adjust = get_opd_info (sec);
9550 if (opd_adjust != NULL)
9551 {
9552 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9553 if (adjust == -1)
9554 relocation = 0;
9555 else
9556 relocation += adjust;
9557 }
9558 }
9559 else
9560 {
9561 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9562 r_symndx, symtab_hdr, sym_hashes,
9563 h_elf, sec, relocation,
9564 unresolved_reloc, warned);
9565 sym_name = h_elf->root.root.string;
9566 sym_type = h_elf->type;
9567 }
9568 h = (struct ppc_link_hash_entry *) h_elf;
9569
9570 /* TLS optimizations. Replace instruction sequences and relocs
9571 based on information we collected in tls_optimize. We edit
9572 RELOCS so that --emit-relocs will output something sensible
9573 for the final instruction stream. */
9574 tls_mask = 0;
9575 tls_gd = 0;
9576 toc_symndx = 0;
9577 if (IS_PPC64_TLS_RELOC (r_type))
9578 {
9579 if (h != NULL)
9580 tls_mask = h->tls_mask;
9581 else if (local_got_ents != NULL)
9582 {
9583 char *lgot_masks;
9584 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9585 tls_mask = lgot_masks[r_symndx];
9586 }
9587 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9588 {
9589 /* Check for toc tls entries. */
9590 char *toc_tls;
9591
9592 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9593 rel, input_bfd))
9594 return FALSE;
9595
9596 if (toc_tls)
9597 tls_mask = *toc_tls;
9598 }
9599 }
9600
9601 /* Check that tls relocs are used with tls syms, and non-tls
9602 relocs are used with non-tls syms. */
9603 if (r_symndx != 0
9604 && r_type != R_PPC64_NONE
9605 && (h == NULL
9606 || h->elf.root.type == bfd_link_hash_defined
9607 || h->elf.root.type == bfd_link_hash_defweak)
9608 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9609 {
9610 if (r_type == R_PPC64_TLS && tls_mask != 0)
9611 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9612 ;
9613 else
9614 (*_bfd_error_handler)
9615 (sym_type == STT_TLS
9616 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9617 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9618 input_bfd,
9619 input_section,
9620 (long) rel->r_offset,
9621 ppc64_elf_howto_table[r_type]->name,
9622 sym_name);
9623 }
9624
9625 /* Ensure reloc mapping code below stays sane. */
9626 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9627 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9628 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9629 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9630 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9631 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9632 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9633 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9634 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9635 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9636 abort ();
9637
9638 switch (r_type)
9639 {
9640 default:
9641 break;
9642
9643 case R_PPC64_TOC16:
9644 case R_PPC64_TOC16_LO:
9645 case R_PPC64_TOC16_DS:
9646 case R_PPC64_TOC16_LO_DS:
9647 {
9648 /* Check for toc tls entries. */
9649 char *toc_tls;
9650 int retval;
9651
9652 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9653 rel, input_bfd);
9654 if (retval == 0)
9655 return FALSE;
9656
9657 if (toc_tls)
9658 {
9659 tls_mask = *toc_tls;
9660 if (r_type == R_PPC64_TOC16_DS
9661 || r_type == R_PPC64_TOC16_LO_DS)
9662 {
9663 if (tls_mask != 0
9664 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9665 goto toctprel;
9666 }
9667 else
9668 {
9669 /* If we found a GD reloc pair, then we might be
9670 doing a GD->IE transition. */
9671 if (retval == 2)
9672 {
9673 tls_gd = TLS_TPRELGD;
9674 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9675 goto tls_get_addr_check;
9676 }
9677 else if (retval == 3)
9678 {
9679 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9680 goto tls_get_addr_check;
9681 }
9682 }
9683 }
9684 }
9685 break;
9686
9687 case R_PPC64_GOT_TPREL16_DS:
9688 case R_PPC64_GOT_TPREL16_LO_DS:
9689 if (tls_mask != 0
9690 && (tls_mask & TLS_TPREL) == 0)
9691 {
9692 toctprel:
9693 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9694 insn &= 31 << 21;
9695 insn |= 0x3c0d0000; /* addis 0,13,0 */
9696 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9697 r_type = R_PPC64_TPREL16_HA;
9698 if (toc_symndx != 0)
9699 {
9700 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9701 /* We changed the symbol. Start over in order to
9702 get h, sym, sec etc. right. */
9703 rel--;
9704 continue;
9705 }
9706 else
9707 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9708 }
9709 break;
9710
9711 case R_PPC64_TLS:
9712 if (tls_mask != 0
9713 && (tls_mask & TLS_TPREL) == 0)
9714 {
9715 bfd_vma rtra;
9716 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9717 if ((insn & ((0x3f << 26) | (31 << 11)))
9718 == ((31 << 26) | (13 << 11)))
9719 rtra = insn & ((1 << 26) - (1 << 16));
9720 else if ((insn & ((0x3f << 26) | (31 << 16)))
9721 == ((31 << 26) | (13 << 16)))
9722 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9723 else
9724 abort ();
9725 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9726 /* add -> addi. */
9727 insn = 14 << 26;
9728 else if ((insn & (31 << 1)) == 23 << 1
9729 && ((insn & (31 << 6)) < 14 << 6
9730 || ((insn & (31 << 6)) >= 16 << 6
9731 && (insn & (31 << 6)) < 24 << 6)))
9732 /* load and store indexed -> dform. */
9733 insn = (32 | ((insn >> 6) & 31)) << 26;
9734 else if ((insn & (31 << 1)) == 21 << 1
9735 && (insn & (0x1a << 6)) == 0)
9736 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9737 insn = (((58 | ((insn >> 6) & 4)) << 26)
9738 | ((insn >> 6) & 1));
9739 else if ((insn & (31 << 1)) == 21 << 1
9740 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9741 /* lwax -> lwa. */
9742 insn = (58 << 26) | 2;
9743 else
9744 abort ();
9745 insn |= rtra;
9746 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9747 /* Was PPC64_TLS which sits on insn boundary, now
9748 PPC64_TPREL16_LO which is at insn+2. */
9749 rel->r_offset += 2;
9750 r_type = R_PPC64_TPREL16_LO;
9751 if (toc_symndx != 0)
9752 {
9753 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9754 /* We changed the symbol. Start over in order to
9755 get h, sym, sec etc. right. */
9756 rel--;
9757 continue;
9758 }
9759 else
9760 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9761 }
9762 break;
9763
9764 case R_PPC64_GOT_TLSGD16_HI:
9765 case R_PPC64_GOT_TLSGD16_HA:
9766 tls_gd = TLS_TPRELGD;
9767 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9768 goto tls_gdld_hi;
9769 break;
9770
9771 case R_PPC64_GOT_TLSLD16_HI:
9772 case R_PPC64_GOT_TLSLD16_HA:
9773 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9774 {
9775 tls_gdld_hi:
9776 if ((tls_mask & tls_gd) != 0)
9777 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9778 + R_PPC64_GOT_TPREL16_DS);
9779 else
9780 {
9781 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9782 rel->r_offset -= 2;
9783 r_type = R_PPC64_NONE;
9784 }
9785 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9786 }
9787 break;
9788
9789 case R_PPC64_GOT_TLSGD16:
9790 case R_PPC64_GOT_TLSGD16_LO:
9791 tls_gd = TLS_TPRELGD;
9792 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9793 goto tls_get_addr_check;
9794 break;
9795
9796 case R_PPC64_GOT_TLSLD16:
9797 case R_PPC64_GOT_TLSLD16_LO:
9798 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9799 {
9800 tls_get_addr_check:
9801 if (rel + 1 < relend)
9802 {
9803 enum elf_ppc64_reloc_type r_type2;
9804 unsigned long r_symndx2;
9805 struct elf_link_hash_entry *h2;
9806 bfd_vma insn1, insn2, insn3;
9807 bfd_vma offset;
9808
9809 /* The next instruction should be a call to
9810 __tls_get_addr. Peek at the reloc to be sure. */
9811 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9812 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9813 if (r_symndx2 < symtab_hdr->sh_info
9814 || (r_type2 != R_PPC64_REL14
9815 && r_type2 != R_PPC64_REL14_BRTAKEN
9816 && r_type2 != R_PPC64_REL14_BRNTAKEN
9817 && r_type2 != R_PPC64_REL24))
9818 break;
9819
9820 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9821 while (h2->root.type == bfd_link_hash_indirect
9822 || h2->root.type == bfd_link_hash_warning)
9823 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9824 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9825 && h2 != &htab->tls_get_addr_fd->elf))
9826 break;
9827
9828 /* OK, it checks out. Replace the call. */
9829 offset = rel[1].r_offset;
9830 insn1 = bfd_get_32 (output_bfd,
9831 contents + rel->r_offset - 2);
9832 insn3 = bfd_get_32 (output_bfd,
9833 contents + offset + 4);
9834 if ((tls_mask & tls_gd) != 0)
9835 {
9836 /* IE */
9837 insn1 &= (1 << 26) - (1 << 2);
9838 insn1 |= 58 << 26; /* ld */
9839 insn2 = 0x7c636a14; /* add 3,3,13 */
9840 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9841 if ((tls_mask & TLS_EXPLICIT) == 0)
9842 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9843 + R_PPC64_GOT_TPREL16_DS);
9844 else
9845 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9846 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9847 }
9848 else
9849 {
9850 /* LE */
9851 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9852 insn2 = 0x38630000; /* addi 3,3,0 */
9853 if (tls_gd == 0)
9854 {
9855 /* Was an LD reloc. */
9856 r_symndx = 0;
9857 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9858 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9859 }
9860 else if (toc_symndx != 0)
9861 r_symndx = toc_symndx;
9862 r_type = R_PPC64_TPREL16_HA;
9863 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9864 rel[1].r_info = ELF64_R_INFO (r_symndx,
9865 R_PPC64_TPREL16_LO);
9866 rel[1].r_offset += 2;
9867 }
9868 if (insn3 == NOP
9869 || insn3 == CROR_151515 || insn3 == CROR_313131)
9870 {
9871 insn3 = insn2;
9872 insn2 = NOP;
9873 rel[1].r_offset += 4;
9874 }
9875 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9876 bfd_put_32 (output_bfd, insn2, contents + offset);
9877 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9878 if (tls_gd == 0 || toc_symndx != 0)
9879 {
9880 /* We changed the symbol. Start over in order
9881 to get h, sym, sec etc. right. */
9882 rel--;
9883 continue;
9884 }
9885 }
9886 }
9887 break;
9888
9889 case R_PPC64_DTPMOD64:
9890 if (rel + 1 < relend
9891 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9892 && rel[1].r_offset == rel->r_offset + 8)
9893 {
9894 if ((tls_mask & TLS_GD) == 0)
9895 {
9896 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9897 if ((tls_mask & TLS_TPRELGD) != 0)
9898 r_type = R_PPC64_TPREL64;
9899 else
9900 {
9901 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9902 r_type = R_PPC64_NONE;
9903 }
9904 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9905 }
9906 }
9907 else
9908 {
9909 if ((tls_mask & TLS_LD) == 0)
9910 {
9911 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9912 r_type = R_PPC64_NONE;
9913 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9914 }
9915 }
9916 break;
9917
9918 case R_PPC64_TPREL64:
9919 if ((tls_mask & TLS_TPREL) == 0)
9920 {
9921 r_type = R_PPC64_NONE;
9922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9923 }
9924 break;
9925 }
9926
9927 /* Handle other relocations that tweak non-addend part of insn. */
9928 insn = 0;
9929 max_br_offset = 1 << 25;
9930 addend = rel->r_addend;
9931 switch (r_type)
9932 {
9933 default:
9934 break;
9935
9936 /* Branch taken prediction relocations. */
9937 case R_PPC64_ADDR14_BRTAKEN:
9938 case R_PPC64_REL14_BRTAKEN:
9939 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9940 /* Fall thru. */
9941
9942 /* Branch not taken prediction relocations. */
9943 case R_PPC64_ADDR14_BRNTAKEN:
9944 case R_PPC64_REL14_BRNTAKEN:
9945 insn |= bfd_get_32 (output_bfd,
9946 contents + rel->r_offset) & ~(0x01 << 21);
9947 /* Fall thru. */
9948
9949 case R_PPC64_REL14:
9950 max_br_offset = 1 << 15;
9951 /* Fall thru. */
9952
9953 case R_PPC64_REL24:
9954 /* Calls to functions with a different TOC, such as calls to
9955 shared objects, need to alter the TOC pointer. This is
9956 done using a linkage stub. A REL24 branching to these
9957 linkage stubs needs to be followed by a nop, as the nop
9958 will be replaced with an instruction to restore the TOC
9959 base pointer. */
9960 stub_entry = NULL;
9961 fdh = h;
9962 if (((h != NULL
9963 && (((fdh = h->oh) != NULL
9964 && fdh->elf.plt.plist != NULL)
9965 || (fdh = h)->elf.plt.plist != NULL))
9966 || (sec != NULL
9967 && sec->output_section != NULL
9968 && sec->id <= htab->top_id
9969 && (htab->stub_group[sec->id].toc_off
9970 != htab->stub_group[input_section->id].toc_off)))
9971 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9972 rel, htab)) != NULL
9973 && (stub_entry->stub_type == ppc_stub_plt_call
9974 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9975 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9976 {
9977 bfd_boolean can_plt_call = FALSE;
9978
9979 if (rel->r_offset + 8 <= input_section->size)
9980 {
9981 unsigned long nop;
9982 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9983 if (nop == NOP
9984 || nop == CROR_151515 || nop == CROR_313131)
9985 {
9986 bfd_put_32 (input_bfd, LD_R2_40R1,
9987 contents + rel->r_offset + 4);
9988 can_plt_call = TRUE;
9989 }
9990 }
9991
9992 if (!can_plt_call)
9993 {
9994 if (stub_entry->stub_type == ppc_stub_plt_call)
9995 {
9996 /* If this is a plain branch rather than a branch
9997 and link, don't require a nop. */
9998 unsigned long br;
9999 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10000 if ((br & 1) == 0)
10001 can_plt_call = TRUE;
10002 else
10003 stub_entry = NULL;
10004 }
10005 else if (h != NULL
10006 && strcmp (h->elf.root.root.string,
10007 ".__libc_start_main") == 0)
10008 {
10009 /* Allow crt1 branch to go via a toc adjusting stub. */
10010 can_plt_call = TRUE;
10011 }
10012 else
10013 {
10014 if (strcmp (input_section->output_section->name,
10015 ".init") == 0
10016 || strcmp (input_section->output_section->name,
10017 ".fini") == 0)
10018 (*_bfd_error_handler)
10019 (_("%B(%A+0x%lx): automatic multiple TOCs "
10020 "not supported using your crt files; "
10021 "recompile with -mminimal-toc or upgrade gcc"),
10022 input_bfd,
10023 input_section,
10024 (long) rel->r_offset);
10025 else
10026 (*_bfd_error_handler)
10027 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10028 "does not allow automatic multiple TOCs; "
10029 "recompile with -mminimal-toc or "
10030 "-fno-optimize-sibling-calls, "
10031 "or make `%s' extern"),
10032 input_bfd,
10033 input_section,
10034 (long) rel->r_offset,
10035 sym_name,
10036 sym_name);
10037 bfd_set_error (bfd_error_bad_value);
10038 ret = FALSE;
10039 }
10040 }
10041
10042 if (can_plt_call
10043 && stub_entry->stub_type == ppc_stub_plt_call)
10044 unresolved_reloc = FALSE;
10045 }
10046
10047 if (stub_entry == NULL
10048 && get_opd_info (sec) != NULL)
10049 {
10050 /* The branch destination is the value of the opd entry. */
10051 bfd_vma off = (relocation - sec->output_section->vma
10052 - sec->output_offset + rel->r_addend);
10053 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10054 if (dest != (bfd_vma) -1)
10055 {
10056 relocation = dest;
10057 addend = 0;
10058 }
10059 }
10060
10061 /* If the branch is out of reach we ought to have a long
10062 branch stub. */
10063 from = (rel->r_offset
10064 + input_section->output_offset
10065 + input_section->output_section->vma);
10066
10067 if (stub_entry == NULL
10068 && (relocation + rel->r_addend - from + max_br_offset
10069 >= 2 * max_br_offset)
10070 && r_type != R_PPC64_ADDR14_BRTAKEN
10071 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10072 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10073 htab);
10074
10075 if (stub_entry != NULL)
10076 {
10077 /* Munge up the value and addend so that we call the stub
10078 rather than the procedure directly. */
10079 relocation = (stub_entry->stub_offset
10080 + stub_entry->stub_sec->output_offset
10081 + stub_entry->stub_sec->output_section->vma);
10082 addend = 0;
10083 }
10084
10085 if (insn != 0)
10086 {
10087 if (is_power4)
10088 {
10089 /* Set 'a' bit. This is 0b00010 in BO field for branch
10090 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10091 for branch on CTR insns (BO == 1a00t or 1a01t). */
10092 if ((insn & (0x14 << 21)) == (0x04 << 21))
10093 insn |= 0x02 << 21;
10094 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10095 insn |= 0x08 << 21;
10096 else
10097 break;
10098 }
10099 else
10100 {
10101 /* Invert 'y' bit if not the default. */
10102 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10103 insn ^= 0x01 << 21;
10104 }
10105
10106 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10107 }
10108
10109 /* NOP out calls to undefined weak functions.
10110 We can thus call a weak function without first
10111 checking whether the function is defined. */
10112 else if (h != NULL
10113 && h->elf.root.type == bfd_link_hash_undefweak
10114 && r_type == R_PPC64_REL24
10115 && relocation == 0
10116 && rel->r_addend == 0)
10117 {
10118 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10119 continue;
10120 }
10121 break;
10122 }
10123
10124 /* Set `addend'. */
10125 tls_type = 0;
10126 switch (r_type)
10127 {
10128 default:
10129 (*_bfd_error_handler)
10130 (_("%B: unknown relocation type %d for symbol %s"),
10131 input_bfd, (int) r_type, sym_name);
10132
10133 bfd_set_error (bfd_error_bad_value);
10134 ret = FALSE;
10135 continue;
10136
10137 case R_PPC64_NONE:
10138 case R_PPC64_TLS:
10139 case R_PPC64_GNU_VTINHERIT:
10140 case R_PPC64_GNU_VTENTRY:
10141 continue;
10142
10143 /* GOT16 relocations. Like an ADDR16 using the symbol's
10144 address in the GOT as relocation value instead of the
10145 symbol's value itself. Also, create a GOT entry for the
10146 symbol and put the symbol value there. */
10147 case R_PPC64_GOT_TLSGD16:
10148 case R_PPC64_GOT_TLSGD16_LO:
10149 case R_PPC64_GOT_TLSGD16_HI:
10150 case R_PPC64_GOT_TLSGD16_HA:
10151 tls_type = TLS_TLS | TLS_GD;
10152 goto dogot;
10153
10154 case R_PPC64_GOT_TLSLD16:
10155 case R_PPC64_GOT_TLSLD16_LO:
10156 case R_PPC64_GOT_TLSLD16_HI:
10157 case R_PPC64_GOT_TLSLD16_HA:
10158 tls_type = TLS_TLS | TLS_LD;
10159 goto dogot;
10160
10161 case R_PPC64_GOT_TPREL16_DS:
10162 case R_PPC64_GOT_TPREL16_LO_DS:
10163 case R_PPC64_GOT_TPREL16_HI:
10164 case R_PPC64_GOT_TPREL16_HA:
10165 tls_type = TLS_TLS | TLS_TPREL;
10166 goto dogot;
10167
10168 case R_PPC64_GOT_DTPREL16_DS:
10169 case R_PPC64_GOT_DTPREL16_LO_DS:
10170 case R_PPC64_GOT_DTPREL16_HI:
10171 case R_PPC64_GOT_DTPREL16_HA:
10172 tls_type = TLS_TLS | TLS_DTPREL;
10173 goto dogot;
10174
10175 case R_PPC64_GOT16:
10176 case R_PPC64_GOT16_LO:
10177 case R_PPC64_GOT16_HI:
10178 case R_PPC64_GOT16_HA:
10179 case R_PPC64_GOT16_DS:
10180 case R_PPC64_GOT16_LO_DS:
10181 dogot:
10182 {
10183 /* Relocation is to the entry for this symbol in the global
10184 offset table. */
10185 asection *got;
10186 bfd_vma *offp;
10187 bfd_vma off;
10188 unsigned long indx = 0;
10189
10190 if (tls_type == (TLS_TLS | TLS_LD)
10191 && (h == NULL
10192 || !h->elf.def_dynamic))
10193 offp = &ppc64_tlsld_got (input_bfd)->offset;
10194 else
10195 {
10196 struct got_entry *ent;
10197
10198 if (h != NULL)
10199 {
10200 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10201 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10202 &h->elf)
10203 || (info->shared
10204 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10205 /* This is actually a static link, or it is a
10206 -Bsymbolic link and the symbol is defined
10207 locally, or the symbol was forced to be local
10208 because of a version file. */
10209 ;
10210 else
10211 {
10212 indx = h->elf.dynindx;
10213 unresolved_reloc = FALSE;
10214 }
10215 ent = h->elf.got.glist;
10216 }
10217 else
10218 {
10219 if (local_got_ents == NULL)
10220 abort ();
10221 ent = local_got_ents[r_symndx];
10222 }
10223
10224 for (; ent != NULL; ent = ent->next)
10225 if (ent->addend == rel->r_addend
10226 && ent->owner == input_bfd
10227 && ent->tls_type == tls_type)
10228 break;
10229 if (ent == NULL)
10230 abort ();
10231 offp = &ent->got.offset;
10232 }
10233
10234 got = ppc64_elf_tdata (input_bfd)->got;
10235 if (got == NULL)
10236 abort ();
10237
10238 /* The offset must always be a multiple of 8. We use the
10239 least significant bit to record whether we have already
10240 processed this entry. */
10241 off = *offp;
10242 if ((off & 1) != 0)
10243 off &= ~1;
10244 else
10245 {
10246 /* Generate relocs for the dynamic linker, except in
10247 the case of TLSLD where we'll use one entry per
10248 module. */
10249 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10250
10251 *offp = off | 1;
10252 if ((info->shared || indx != 0)
10253 && (h == NULL
10254 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10255 || h->elf.root.type != bfd_link_hash_undefweak))
10256 {
10257 outrel.r_offset = (got->output_section->vma
10258 + got->output_offset
10259 + off);
10260 outrel.r_addend = rel->r_addend;
10261 if (tls_type & (TLS_LD | TLS_GD))
10262 {
10263 outrel.r_addend = 0;
10264 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10265 if (tls_type == (TLS_TLS | TLS_GD))
10266 {
10267 loc = relgot->contents;
10268 loc += (relgot->reloc_count++
10269 * sizeof (Elf64_External_Rela));
10270 bfd_elf64_swap_reloca_out (output_bfd,
10271 &outrel, loc);
10272 outrel.r_offset += 8;
10273 outrel.r_addend = rel->r_addend;
10274 outrel.r_info
10275 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10276 }
10277 }
10278 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10279 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10280 else if (tls_type == (TLS_TLS | TLS_TPREL))
10281 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10282 else if (indx == 0)
10283 {
10284 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10285
10286 /* Write the .got section contents for the sake
10287 of prelink. */
10288 loc = got->contents + off;
10289 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10290 loc);
10291 }
10292 else
10293 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10294
10295 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10296 {
10297 outrel.r_addend += relocation;
10298 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10299 outrel.r_addend -= htab->elf.tls_sec->vma;
10300 }
10301 loc = relgot->contents;
10302 loc += (relgot->reloc_count++
10303 * sizeof (Elf64_External_Rela));
10304 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10305 }
10306
10307 /* Init the .got section contents here if we're not
10308 emitting a reloc. */
10309 else
10310 {
10311 relocation += rel->r_addend;
10312 if (tls_type == (TLS_TLS | TLS_LD))
10313 relocation = 1;
10314 else if (tls_type != 0)
10315 {
10316 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10317 if (tls_type == (TLS_TLS | TLS_TPREL))
10318 relocation += DTP_OFFSET - TP_OFFSET;
10319
10320 if (tls_type == (TLS_TLS | TLS_GD))
10321 {
10322 bfd_put_64 (output_bfd, relocation,
10323 got->contents + off + 8);
10324 relocation = 1;
10325 }
10326 }
10327
10328 bfd_put_64 (output_bfd, relocation,
10329 got->contents + off);
10330 }
10331 }
10332
10333 if (off >= (bfd_vma) -2)
10334 abort ();
10335
10336 relocation = got->output_offset + off;
10337
10338 /* TOC base (r2) is TOC start plus 0x8000. */
10339 addend = -TOC_BASE_OFF;
10340 }
10341 break;
10342
10343 case R_PPC64_PLT16_HA:
10344 case R_PPC64_PLT16_HI:
10345 case R_PPC64_PLT16_LO:
10346 case R_PPC64_PLT32:
10347 case R_PPC64_PLT64:
10348 /* Relocation is to the entry for this symbol in the
10349 procedure linkage table. */
10350
10351 /* Resolve a PLT reloc against a local symbol directly,
10352 without using the procedure linkage table. */
10353 if (h == NULL)
10354 break;
10355
10356 /* It's possible that we didn't make a PLT entry for this
10357 symbol. This happens when statically linking PIC code,
10358 or when using -Bsymbolic. Go find a match if there is a
10359 PLT entry. */
10360 if (htab->plt != NULL)
10361 {
10362 struct plt_entry *ent;
10363 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10364 if (ent->addend == rel->r_addend
10365 && ent->plt.offset != (bfd_vma) -1)
10366 {
10367 relocation = (htab->plt->output_section->vma
10368 + htab->plt->output_offset
10369 + ent->plt.offset);
10370 unresolved_reloc = FALSE;
10371 }
10372 }
10373 break;
10374
10375 case R_PPC64_TOC:
10376 /* Relocation value is TOC base. */
10377 relocation = TOCstart;
10378 if (r_symndx == 0)
10379 relocation += htab->stub_group[input_section->id].toc_off;
10380 else if (unresolved_reloc)
10381 ;
10382 else if (sec != NULL && sec->id <= htab->top_id)
10383 relocation += htab->stub_group[sec->id].toc_off;
10384 else
10385 unresolved_reloc = TRUE;
10386 goto dodyn2;
10387
10388 /* TOC16 relocs. We want the offset relative to the TOC base,
10389 which is the address of the start of the TOC plus 0x8000.
10390 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10391 in this order. */
10392 case R_PPC64_TOC16:
10393 case R_PPC64_TOC16_LO:
10394 case R_PPC64_TOC16_HI:
10395 case R_PPC64_TOC16_DS:
10396 case R_PPC64_TOC16_LO_DS:
10397 case R_PPC64_TOC16_HA:
10398 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10399 break;
10400
10401 /* Relocate against the beginning of the section. */
10402 case R_PPC64_SECTOFF:
10403 case R_PPC64_SECTOFF_LO:
10404 case R_PPC64_SECTOFF_HI:
10405 case R_PPC64_SECTOFF_DS:
10406 case R_PPC64_SECTOFF_LO_DS:
10407 case R_PPC64_SECTOFF_HA:
10408 if (sec != NULL)
10409 addend -= sec->output_section->vma;
10410 break;
10411
10412 case R_PPC64_REL14:
10413 case R_PPC64_REL14_BRNTAKEN:
10414 case R_PPC64_REL14_BRTAKEN:
10415 case R_PPC64_REL24:
10416 break;
10417
10418 case R_PPC64_TPREL16:
10419 case R_PPC64_TPREL16_LO:
10420 case R_PPC64_TPREL16_HI:
10421 case R_PPC64_TPREL16_HA:
10422 case R_PPC64_TPREL16_DS:
10423 case R_PPC64_TPREL16_LO_DS:
10424 case R_PPC64_TPREL16_HIGHER:
10425 case R_PPC64_TPREL16_HIGHERA:
10426 case R_PPC64_TPREL16_HIGHEST:
10427 case R_PPC64_TPREL16_HIGHESTA:
10428 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10429 if (info->shared)
10430 /* The TPREL16 relocs shouldn't really be used in shared
10431 libs as they will result in DT_TEXTREL being set, but
10432 support them anyway. */
10433 goto dodyn;
10434 break;
10435
10436 case R_PPC64_DTPREL16:
10437 case R_PPC64_DTPREL16_LO:
10438 case R_PPC64_DTPREL16_HI:
10439 case R_PPC64_DTPREL16_HA:
10440 case R_PPC64_DTPREL16_DS:
10441 case R_PPC64_DTPREL16_LO_DS:
10442 case R_PPC64_DTPREL16_HIGHER:
10443 case R_PPC64_DTPREL16_HIGHERA:
10444 case R_PPC64_DTPREL16_HIGHEST:
10445 case R_PPC64_DTPREL16_HIGHESTA:
10446 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10447 break;
10448
10449 case R_PPC64_DTPMOD64:
10450 relocation = 1;
10451 addend = 0;
10452 goto dodyn;
10453
10454 case R_PPC64_TPREL64:
10455 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10456 goto dodyn;
10457
10458 case R_PPC64_DTPREL64:
10459 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10460 /* Fall thru */
10461
10462 /* Relocations that may need to be propagated if this is a
10463 dynamic object. */
10464 case R_PPC64_REL30:
10465 case R_PPC64_REL32:
10466 case R_PPC64_REL64:
10467 case R_PPC64_ADDR14:
10468 case R_PPC64_ADDR14_BRNTAKEN:
10469 case R_PPC64_ADDR14_BRTAKEN:
10470 case R_PPC64_ADDR16:
10471 case R_PPC64_ADDR16_DS:
10472 case R_PPC64_ADDR16_HA:
10473 case R_PPC64_ADDR16_HI:
10474 case R_PPC64_ADDR16_HIGHER:
10475 case R_PPC64_ADDR16_HIGHERA:
10476 case R_PPC64_ADDR16_HIGHEST:
10477 case R_PPC64_ADDR16_HIGHESTA:
10478 case R_PPC64_ADDR16_LO:
10479 case R_PPC64_ADDR16_LO_DS:
10480 case R_PPC64_ADDR24:
10481 case R_PPC64_ADDR32:
10482 case R_PPC64_ADDR64:
10483 case R_PPC64_UADDR16:
10484 case R_PPC64_UADDR32:
10485 case R_PPC64_UADDR64:
10486 /* r_symndx will be zero only for relocs against symbols
10487 from removed linkonce sections, or sections discarded by
10488 a linker script. */
10489 dodyn:
10490 if (r_symndx == 0)
10491 break;
10492 /* Fall thru. */
10493
10494 dodyn2:
10495 if ((input_section->flags & SEC_ALLOC) == 0)
10496 break;
10497
10498 if (NO_OPD_RELOCS && is_opd)
10499 break;
10500
10501 if ((info->shared
10502 && (h == NULL
10503 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10504 || h->elf.root.type != bfd_link_hash_undefweak)
10505 && (MUST_BE_DYN_RELOC (r_type)
10506 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10507 || (ELIMINATE_COPY_RELOCS
10508 && !info->shared
10509 && h != NULL
10510 && h->elf.dynindx != -1
10511 && !h->elf.non_got_ref
10512 && h->elf.def_dynamic
10513 && !h->elf.def_regular))
10514 {
10515 Elf_Internal_Rela outrel;
10516 bfd_boolean skip, relocate;
10517 asection *sreloc;
10518 bfd_byte *loc;
10519 bfd_vma out_off;
10520
10521 /* When generating a dynamic object, these relocations
10522 are copied into the output file to be resolved at run
10523 time. */
10524
10525 skip = FALSE;
10526 relocate = FALSE;
10527
10528 out_off = _bfd_elf_section_offset (output_bfd, info,
10529 input_section, rel->r_offset);
10530 if (out_off == (bfd_vma) -1)
10531 skip = TRUE;
10532 else if (out_off == (bfd_vma) -2)
10533 skip = TRUE, relocate = TRUE;
10534 out_off += (input_section->output_section->vma
10535 + input_section->output_offset);
10536 outrel.r_offset = out_off;
10537 outrel.r_addend = rel->r_addend;
10538
10539 /* Optimize unaligned reloc use. */
10540 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10541 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10542 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10543 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10544 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10545 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10546 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10547 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10548 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10549
10550 if (skip)
10551 memset (&outrel, 0, sizeof outrel);
10552 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10553 && !is_opd
10554 && r_type != R_PPC64_TOC)
10555 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10556 else
10557 {
10558 /* This symbol is local, or marked to become local,
10559 or this is an opd section reloc which must point
10560 at a local function. */
10561 outrel.r_addend += relocation;
10562 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10563 {
10564 if (is_opd && h != NULL)
10565 {
10566 /* Lie about opd entries. This case occurs
10567 when building shared libraries and we
10568 reference a function in another shared
10569 lib. The same thing happens for a weak
10570 definition in an application that's
10571 overridden by a strong definition in a
10572 shared lib. (I believe this is a generic
10573 bug in binutils handling of weak syms.)
10574 In these cases we won't use the opd
10575 entry in this lib. */
10576 unresolved_reloc = FALSE;
10577 }
10578 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10579
10580 /* We need to relocate .opd contents for ld.so.
10581 Prelink also wants simple and consistent rules
10582 for relocs. This make all RELATIVE relocs have
10583 *r_offset equal to r_addend. */
10584 relocate = TRUE;
10585 }
10586 else
10587 {
10588 long indx = 0;
10589
10590 if (bfd_is_abs_section (sec))
10591 ;
10592 else if (sec == NULL || sec->owner == NULL)
10593 {
10594 bfd_set_error (bfd_error_bad_value);
10595 return FALSE;
10596 }
10597 else
10598 {
10599 asection *osec;
10600
10601 osec = sec->output_section;
10602 indx = elf_section_data (osec)->dynindx;
10603
10604 /* We are turning this relocation into one
10605 against a section symbol, so subtract out
10606 the output section's address but not the
10607 offset of the input section in the output
10608 section. */
10609 outrel.r_addend -= osec->vma;
10610 }
10611
10612 outrel.r_info = ELF64_R_INFO (indx, r_type);
10613 }
10614 }
10615
10616 sreloc = elf_section_data (input_section)->sreloc;
10617 if (sreloc == NULL)
10618 abort ();
10619
10620 loc = sreloc->contents;
10621 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10622 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10623
10624 /* If this reloc is against an external symbol, it will
10625 be computed at runtime, so there's no need to do
10626 anything now. However, for the sake of prelink ensure
10627 that the section contents are a known value. */
10628 if (! relocate)
10629 {
10630 unresolved_reloc = FALSE;
10631 /* The value chosen here is quite arbitrary as ld.so
10632 ignores section contents except for the special
10633 case of .opd where the contents might be accessed
10634 before relocation. Choose zero, as that won't
10635 cause reloc overflow. */
10636 relocation = 0;
10637 addend = 0;
10638 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10639 to improve backward compatibility with older
10640 versions of ld. */
10641 if (r_type == R_PPC64_ADDR64)
10642 addend = outrel.r_addend;
10643 /* Adjust pc_relative relocs to have zero in *r_offset. */
10644 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10645 addend = (input_section->output_section->vma
10646 + input_section->output_offset
10647 + rel->r_offset);
10648 }
10649 }
10650 break;
10651
10652 case R_PPC64_COPY:
10653 case R_PPC64_GLOB_DAT:
10654 case R_PPC64_JMP_SLOT:
10655 case R_PPC64_RELATIVE:
10656 /* We shouldn't ever see these dynamic relocs in relocatable
10657 files. */
10658 /* Fall through. */
10659
10660 case R_PPC64_PLTGOT16:
10661 case R_PPC64_PLTGOT16_DS:
10662 case R_PPC64_PLTGOT16_HA:
10663 case R_PPC64_PLTGOT16_HI:
10664 case R_PPC64_PLTGOT16_LO:
10665 case R_PPC64_PLTGOT16_LO_DS:
10666 case R_PPC64_PLTREL32:
10667 case R_PPC64_PLTREL64:
10668 /* These ones haven't been implemented yet. */
10669
10670 (*_bfd_error_handler)
10671 (_("%B: relocation %s is not supported for symbol %s."),
10672 input_bfd,
10673 ppc64_elf_howto_table[r_type]->name, sym_name);
10674
10675 bfd_set_error (bfd_error_invalid_operation);
10676 ret = FALSE;
10677 continue;
10678 }
10679
10680 /* Do any further special processing. */
10681 switch (r_type)
10682 {
10683 default:
10684 break;
10685
10686 case R_PPC64_ADDR16_HA:
10687 case R_PPC64_ADDR16_HIGHERA:
10688 case R_PPC64_ADDR16_HIGHESTA:
10689 case R_PPC64_GOT16_HA:
10690 case R_PPC64_PLTGOT16_HA:
10691 case R_PPC64_PLT16_HA:
10692 case R_PPC64_TOC16_HA:
10693 case R_PPC64_SECTOFF_HA:
10694 case R_PPC64_TPREL16_HA:
10695 case R_PPC64_DTPREL16_HA:
10696 case R_PPC64_GOT_TLSGD16_HA:
10697 case R_PPC64_GOT_TLSLD16_HA:
10698 case R_PPC64_GOT_TPREL16_HA:
10699 case R_PPC64_GOT_DTPREL16_HA:
10700 case R_PPC64_TPREL16_HIGHER:
10701 case R_PPC64_TPREL16_HIGHERA:
10702 case R_PPC64_TPREL16_HIGHEST:
10703 case R_PPC64_TPREL16_HIGHESTA:
10704 case R_PPC64_DTPREL16_HIGHER:
10705 case R_PPC64_DTPREL16_HIGHERA:
10706 case R_PPC64_DTPREL16_HIGHEST:
10707 case R_PPC64_DTPREL16_HIGHESTA:
10708 /* It's just possible that this symbol is a weak symbol
10709 that's not actually defined anywhere. In that case,
10710 'sec' would be NULL, and we should leave the symbol
10711 alone (it will be set to zero elsewhere in the link). */
10712 if (sec != NULL)
10713 /* Add 0x10000 if sign bit in 0:15 is set.
10714 Bits 0:15 are not used. */
10715 addend += 0x8000;
10716 break;
10717
10718 case R_PPC64_ADDR16_DS:
10719 case R_PPC64_ADDR16_LO_DS:
10720 case R_PPC64_GOT16_DS:
10721 case R_PPC64_GOT16_LO_DS:
10722 case R_PPC64_PLT16_LO_DS:
10723 case R_PPC64_SECTOFF_DS:
10724 case R_PPC64_SECTOFF_LO_DS:
10725 case R_PPC64_TOC16_DS:
10726 case R_PPC64_TOC16_LO_DS:
10727 case R_PPC64_PLTGOT16_DS:
10728 case R_PPC64_PLTGOT16_LO_DS:
10729 case R_PPC64_GOT_TPREL16_DS:
10730 case R_PPC64_GOT_TPREL16_LO_DS:
10731 case R_PPC64_GOT_DTPREL16_DS:
10732 case R_PPC64_GOT_DTPREL16_LO_DS:
10733 case R_PPC64_TPREL16_DS:
10734 case R_PPC64_TPREL16_LO_DS:
10735 case R_PPC64_DTPREL16_DS:
10736 case R_PPC64_DTPREL16_LO_DS:
10737 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10738 mask = 3;
10739 /* If this reloc is against an lq insn, then the value must be
10740 a multiple of 16. This is somewhat of a hack, but the
10741 "correct" way to do this by defining _DQ forms of all the
10742 _DS relocs bloats all reloc switches in this file. It
10743 doesn't seem to make much sense to use any of these relocs
10744 in data, so testing the insn should be safe. */
10745 if ((insn & (0x3f << 26)) == (56u << 26))
10746 mask = 15;
10747 if (((relocation + addend) & mask) != 0)
10748 {
10749 (*_bfd_error_handler)
10750 (_("%B: error: relocation %s not a multiple of %d"),
10751 input_bfd,
10752 ppc64_elf_howto_table[r_type]->name,
10753 mask + 1);
10754 bfd_set_error (bfd_error_bad_value);
10755 ret = FALSE;
10756 continue;
10757 }
10758 break;
10759 }
10760
10761 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10762 because such sections are not SEC_ALLOC and thus ld.so will
10763 not process them. */
10764 if (unresolved_reloc
10765 && !((input_section->flags & SEC_DEBUGGING) != 0
10766 && h->elf.def_dynamic))
10767 {
10768 (*_bfd_error_handler)
10769 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10770 input_bfd,
10771 input_section,
10772 (long) rel->r_offset,
10773 ppc64_elf_howto_table[(int) r_type]->name,
10774 h->elf.root.root.string);
10775 ret = FALSE;
10776 }
10777
10778 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10779 input_bfd,
10780 input_section,
10781 contents,
10782 rel->r_offset,
10783 relocation,
10784 addend);
10785
10786 if (r != bfd_reloc_ok)
10787 {
10788 if (sym_name == NULL)
10789 sym_name = "(null)";
10790 if (r == bfd_reloc_overflow)
10791 {
10792 if (warned)
10793 continue;
10794 if (h != NULL
10795 && h->elf.root.type == bfd_link_hash_undefweak
10796 && ppc64_elf_howto_table[r_type]->pc_relative)
10797 {
10798 /* Assume this is a call protected by other code that
10799 detects the symbol is undefined. If this is the case,
10800 we can safely ignore the overflow. If not, the
10801 program is hosed anyway, and a little warning isn't
10802 going to help. */
10803
10804 continue;
10805 }
10806
10807 if (!((*info->callbacks->reloc_overflow)
10808 (info, (h ? &h->elf.root : NULL), sym_name,
10809 ppc64_elf_howto_table[r_type]->name,
10810 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10811 return FALSE;
10812 }
10813 else
10814 {
10815 (*_bfd_error_handler)
10816 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10817 input_bfd,
10818 input_section,
10819 (long) rel->r_offset,
10820 ppc64_elf_howto_table[r_type]->name,
10821 sym_name,
10822 (int) r);
10823 ret = FALSE;
10824 }
10825 }
10826 }
10827
10828 /* If we're emitting relocations, then shortly after this function
10829 returns, reloc offsets and addends for this section will be
10830 adjusted. Worse, reloc symbol indices will be for the output
10831 file rather than the input. Save a copy of the relocs for
10832 opd_entry_value. */
10833 if (is_opd && info->emitrelocations)
10834 {
10835 bfd_size_type amt;
10836 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10837 rel = bfd_alloc (input_bfd, amt);
10838 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10839 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10840 if (rel == NULL)
10841 return FALSE;
10842 memcpy (rel, relocs, amt);
10843 }
10844 return ret;
10845 }
10846
10847 /* Adjust the value of any local symbols in opd sections. */
10848
10849 static bfd_boolean
10850 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10851 const char *name ATTRIBUTE_UNUSED,
10852 Elf_Internal_Sym *elfsym,
10853 asection *input_sec,
10854 struct elf_link_hash_entry *h)
10855 {
10856 long *opd_adjust, adjust;
10857 bfd_vma value;
10858
10859 if (h != NULL)
10860 return TRUE;
10861
10862 opd_adjust = get_opd_info (input_sec);
10863 if (opd_adjust == NULL)
10864 return TRUE;
10865
10866 value = elfsym->st_value - input_sec->output_offset;
10867 if (!info->relocatable)
10868 value -= input_sec->output_section->vma;
10869
10870 adjust = opd_adjust[value / 8];
10871 if (adjust == -1)
10872 elfsym->st_value = 0;
10873 else
10874 elfsym->st_value += adjust;
10875 return TRUE;
10876 }
10877
10878 /* Finish up dynamic symbol handling. We set the contents of various
10879 dynamic sections here. */
10880
10881 static bfd_boolean
10882 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10883 struct bfd_link_info *info,
10884 struct elf_link_hash_entry *h,
10885 Elf_Internal_Sym *sym)
10886 {
10887 struct ppc_link_hash_table *htab;
10888 bfd *dynobj;
10889 struct plt_entry *ent;
10890 Elf_Internal_Rela rela;
10891 bfd_byte *loc;
10892
10893 htab = ppc_hash_table (info);
10894 dynobj = htab->elf.dynobj;
10895
10896 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10897 if (ent->plt.offset != (bfd_vma) -1)
10898 {
10899 /* This symbol has an entry in the procedure linkage
10900 table. Set it up. */
10901
10902 if (htab->plt == NULL
10903 || htab->relplt == NULL
10904 || htab->glink == NULL)
10905 abort ();
10906
10907 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10908 fill in the PLT entry. */
10909 rela.r_offset = (htab->plt->output_section->vma
10910 + htab->plt->output_offset
10911 + ent->plt.offset);
10912 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10913 rela.r_addend = ent->addend;
10914
10915 loc = htab->relplt->contents;
10916 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10917 * sizeof (Elf64_External_Rela));
10918 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10919 }
10920
10921 if (h->needs_copy)
10922 {
10923 Elf_Internal_Rela rela;
10924 bfd_byte *loc;
10925
10926 /* This symbol needs a copy reloc. Set it up. */
10927
10928 if (h->dynindx == -1
10929 || (h->root.type != bfd_link_hash_defined
10930 && h->root.type != bfd_link_hash_defweak)
10931 || htab->relbss == NULL)
10932 abort ();
10933
10934 rela.r_offset = (h->root.u.def.value
10935 + h->root.u.def.section->output_section->vma
10936 + h->root.u.def.section->output_offset);
10937 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10938 rela.r_addend = 0;
10939 loc = htab->relbss->contents;
10940 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10941 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10942 }
10943
10944 /* Mark some specially defined symbols as absolute. */
10945 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10946 sym->st_shndx = SHN_ABS;
10947
10948 return TRUE;
10949 }
10950
10951 /* Used to decide how to sort relocs in an optimal manner for the
10952 dynamic linker, before writing them out. */
10953
10954 static enum elf_reloc_type_class
10955 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10956 {
10957 enum elf_ppc64_reloc_type r_type;
10958
10959 r_type = ELF64_R_TYPE (rela->r_info);
10960 switch (r_type)
10961 {
10962 case R_PPC64_RELATIVE:
10963 return reloc_class_relative;
10964 case R_PPC64_JMP_SLOT:
10965 return reloc_class_plt;
10966 case R_PPC64_COPY:
10967 return reloc_class_copy;
10968 default:
10969 return reloc_class_normal;
10970 }
10971 }
10972
10973 /* Finish up the dynamic sections. */
10974
10975 static bfd_boolean
10976 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10977 struct bfd_link_info *info)
10978 {
10979 struct ppc_link_hash_table *htab;
10980 bfd *dynobj;
10981 asection *sdyn;
10982
10983 htab = ppc_hash_table (info);
10984 dynobj = htab->elf.dynobj;
10985 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10986
10987 if (htab->elf.dynamic_sections_created)
10988 {
10989 Elf64_External_Dyn *dyncon, *dynconend;
10990
10991 if (sdyn == NULL || htab->got == NULL)
10992 abort ();
10993
10994 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10995 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10996 for (; dyncon < dynconend; dyncon++)
10997 {
10998 Elf_Internal_Dyn dyn;
10999 asection *s;
11000
11001 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11002
11003 switch (dyn.d_tag)
11004 {
11005 default:
11006 continue;
11007
11008 case DT_PPC64_GLINK:
11009 s = htab->glink;
11010 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11011 /* We stupidly defined DT_PPC64_GLINK to be the start
11012 of glink rather than the first entry point, which is
11013 what ld.so needs, and now have a bigger stub to
11014 support automatic multiple TOCs. */
11015 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11016 break;
11017
11018 case DT_PPC64_OPD:
11019 s = bfd_get_section_by_name (output_bfd, ".opd");
11020 if (s == NULL)
11021 continue;
11022 dyn.d_un.d_ptr = s->vma;
11023 break;
11024
11025 case DT_PPC64_OPDSZ:
11026 s = bfd_get_section_by_name (output_bfd, ".opd");
11027 if (s == NULL)
11028 continue;
11029 dyn.d_un.d_val = s->size;
11030 break;
11031
11032 case DT_PLTGOT:
11033 s = htab->plt;
11034 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11035 break;
11036
11037 case DT_JMPREL:
11038 s = htab->relplt;
11039 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11040 break;
11041
11042 case DT_PLTRELSZ:
11043 dyn.d_un.d_val = htab->relplt->size;
11044 break;
11045
11046 case DT_RELASZ:
11047 /* Don't count procedure linkage table relocs in the
11048 overall reloc count. */
11049 s = htab->relplt;
11050 if (s == NULL)
11051 continue;
11052 dyn.d_un.d_val -= s->size;
11053 break;
11054
11055 case DT_RELA:
11056 /* We may not be using the standard ELF linker script.
11057 If .rela.plt is the first .rela section, we adjust
11058 DT_RELA to not include it. */
11059 s = htab->relplt;
11060 if (s == NULL)
11061 continue;
11062 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11063 continue;
11064 dyn.d_un.d_ptr += s->size;
11065 break;
11066 }
11067
11068 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11069 }
11070 }
11071
11072 if (htab->got != NULL && htab->got->size != 0)
11073 {
11074 /* Fill in the first entry in the global offset table.
11075 We use it to hold the link-time TOCbase. */
11076 bfd_put_64 (output_bfd,
11077 elf_gp (output_bfd) + TOC_BASE_OFF,
11078 htab->got->contents);
11079
11080 /* Set .got entry size. */
11081 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11082 }
11083
11084 if (htab->plt != NULL && htab->plt->size != 0)
11085 {
11086 /* Set .plt entry size. */
11087 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11088 = PLT_ENTRY_SIZE;
11089 }
11090
11091 /* We need to handle writing out multiple GOT sections ourselves,
11092 since we didn't add them to DYNOBJ. We know dynobj is the first
11093 bfd. */
11094 while ((dynobj = dynobj->link_next) != NULL)
11095 {
11096 asection *s;
11097
11098 if (!is_ppc64_elf_target (dynobj->xvec))
11099 continue;
11100
11101 s = ppc64_elf_tdata (dynobj)->got;
11102 if (s != NULL
11103 && s->size != 0
11104 && s->output_section != bfd_abs_section_ptr
11105 && !bfd_set_section_contents (output_bfd, s->output_section,
11106 s->contents, s->output_offset,
11107 s->size))
11108 return FALSE;
11109 s = ppc64_elf_tdata (dynobj)->relgot;
11110 if (s != NULL
11111 && s->size != 0
11112 && s->output_section != bfd_abs_section_ptr
11113 && !bfd_set_section_contents (output_bfd, s->output_section,
11114 s->contents, s->output_offset,
11115 s->size))
11116 return FALSE;
11117 }
11118
11119 return TRUE;
11120 }
11121
11122 #include "elf64-target.h"
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