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* elfxx-mips.c (_bfd_mips_elf_section_processing): Warn and
[binutils-gdb.git] / bfd / elf64-ppc.c
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 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2121 / sizeof (ppc64_elf_howto_table[0])));
2122 cache_ptr->howto = ppc64_elf_howto_table[type];
2123 }
2124
2125 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2126
2127 static bfd_reloc_status_type
2128 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2129 void *data, asection *input_section,
2130 bfd *output_bfd, char **error_message)
2131 {
2132 /* If this is a relocatable link (output_bfd test tells us), just
2133 call the generic function. Any adjustment will be done at final
2134 link time. */
2135 if (output_bfd != NULL)
2136 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2137 input_section, output_bfd, error_message);
2138
2139 /* Adjust the addend for sign extension of the low 16 bits.
2140 We won't actually be using the low 16 bits, so trashing them
2141 doesn't matter. */
2142 reloc_entry->addend += 0x8000;
2143 return bfd_reloc_continue;
2144 }
2145
2146 static bfd_reloc_status_type
2147 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2148 void *data, asection *input_section,
2149 bfd *output_bfd, char **error_message)
2150 {
2151 if (output_bfd != NULL)
2152 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2153 input_section, output_bfd, error_message);
2154
2155 if (strcmp (symbol->section->name, ".opd") == 0
2156 && (symbol->section->owner->flags & DYNAMIC) == 0)
2157 {
2158 bfd_vma dest = opd_entry_value (symbol->section,
2159 symbol->value + reloc_entry->addend,
2160 NULL, NULL);
2161 if (dest != (bfd_vma) -1)
2162 reloc_entry->addend = dest - (symbol->value
2163 + symbol->section->output_section->vma
2164 + symbol->section->output_offset);
2165 }
2166 return bfd_reloc_continue;
2167 }
2168
2169 static bfd_reloc_status_type
2170 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2171 void *data, asection *input_section,
2172 bfd *output_bfd, char **error_message)
2173 {
2174 long insn;
2175 enum elf_ppc64_reloc_type r_type;
2176 bfd_size_type octets;
2177 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2178 bfd_boolean is_power4 = FALSE;
2179
2180 /* If this is a relocatable link (output_bfd test tells us), just
2181 call the generic function. Any adjustment will be done at final
2182 link time. */
2183 if (output_bfd != NULL)
2184 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2185 input_section, output_bfd, error_message);
2186
2187 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2188 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2189 insn &= ~(0x01 << 21);
2190 r_type = reloc_entry->howto->type;
2191 if (r_type == R_PPC64_ADDR14_BRTAKEN
2192 || r_type == R_PPC64_REL14_BRTAKEN)
2193 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2194
2195 if (is_power4)
2196 {
2197 /* Set 'a' bit. This is 0b00010 in BO field for branch
2198 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2199 for branch on CTR insns (BO == 1a00t or 1a01t). */
2200 if ((insn & (0x14 << 21)) == (0x04 << 21))
2201 insn |= 0x02 << 21;
2202 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2203 insn |= 0x08 << 21;
2204 else
2205 goto out;
2206 }
2207 else
2208 {
2209 bfd_vma target = 0;
2210 bfd_vma from;
2211
2212 if (!bfd_is_com_section (symbol->section))
2213 target = symbol->value;
2214 target += symbol->section->output_section->vma;
2215 target += symbol->section->output_offset;
2216 target += reloc_entry->addend;
2217
2218 from = (reloc_entry->address
2219 + input_section->output_offset
2220 + input_section->output_section->vma);
2221
2222 /* Invert 'y' bit if not the default. */
2223 if ((bfd_signed_vma) (target - from) < 0)
2224 insn ^= 0x01 << 21;
2225 }
2226 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2227 out:
2228 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2229 input_section, output_bfd, error_message);
2230 }
2231
2232 static bfd_reloc_status_type
2233 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2234 void *data, asection *input_section,
2235 bfd *output_bfd, char **error_message)
2236 {
2237 /* If this is a relocatable link (output_bfd test tells us), just
2238 call the generic function. Any adjustment will be done at final
2239 link time. */
2240 if (output_bfd != NULL)
2241 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2242 input_section, output_bfd, error_message);
2243
2244 /* Subtract the symbol section base address. */
2245 reloc_entry->addend -= symbol->section->output_section->vma;
2246 return bfd_reloc_continue;
2247 }
2248
2249 static bfd_reloc_status_type
2250 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2251 void *data, asection *input_section,
2252 bfd *output_bfd, char **error_message)
2253 {
2254 /* If this is a relocatable link (output_bfd test tells us), just
2255 call the generic function. Any adjustment will be done at final
2256 link time. */
2257 if (output_bfd != NULL)
2258 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2259 input_section, output_bfd, error_message);
2260
2261 /* Subtract the symbol section base address. */
2262 reloc_entry->addend -= symbol->section->output_section->vma;
2263
2264 /* Adjust the addend for sign extension of the low 16 bits. */
2265 reloc_entry->addend += 0x8000;
2266 return bfd_reloc_continue;
2267 }
2268
2269 static bfd_reloc_status_type
2270 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2271 void *data, asection *input_section,
2272 bfd *output_bfd, char **error_message)
2273 {
2274 bfd_vma TOCstart;
2275
2276 /* If this is a relocatable link (output_bfd test tells us), just
2277 call the generic function. Any adjustment will be done at final
2278 link time. */
2279 if (output_bfd != NULL)
2280 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2281 input_section, output_bfd, error_message);
2282
2283 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2284 if (TOCstart == 0)
2285 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2286
2287 /* Subtract the TOC base address. */
2288 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2289 return bfd_reloc_continue;
2290 }
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 bfd_vma TOCstart;
2298
2299 /* If this is a relocatable link (output_bfd test tells us), just
2300 call the generic function. Any adjustment will be done at final
2301 link time. */
2302 if (output_bfd != NULL)
2303 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2304 input_section, output_bfd, error_message);
2305
2306 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2307 if (TOCstart == 0)
2308 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2309
2310 /* Subtract the TOC base address. */
2311 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2312
2313 /* Adjust the addend for sign extension of the low 16 bits. */
2314 reloc_entry->addend += 0x8000;
2315 return bfd_reloc_continue;
2316 }
2317
2318 static bfd_reloc_status_type
2319 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2320 void *data, asection *input_section,
2321 bfd *output_bfd, char **error_message)
2322 {
2323 bfd_vma TOCstart;
2324 bfd_size_type octets;
2325
2326 /* If this is a relocatable link (output_bfd test tells us), just
2327 call the generic function. Any adjustment will be done at final
2328 link time. */
2329 if (output_bfd != NULL)
2330 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2331 input_section, output_bfd, error_message);
2332
2333 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2334 if (TOCstart == 0)
2335 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2336
2337 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2338 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2339 return bfd_reloc_ok;
2340 }
2341
2342 static bfd_reloc_status_type
2343 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2344 void *data, asection *input_section,
2345 bfd *output_bfd, char **error_message)
2346 {
2347 /* If this is a relocatable link (output_bfd test tells us), just
2348 call the generic function. Any adjustment will be done at final
2349 link time. */
2350 if (output_bfd != NULL)
2351 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2352 input_section, output_bfd, error_message);
2353
2354 if (error_message != NULL)
2355 {
2356 static char buf[60];
2357 sprintf (buf, "generic linker can't handle %s",
2358 reloc_entry->howto->name);
2359 *error_message = buf;
2360 }
2361 return bfd_reloc_dangerous;
2362 }
2363
2364 struct ppc64_elf_obj_tdata
2365 {
2366 struct elf_obj_tdata elf;
2367
2368 /* Shortcuts to dynamic linker sections. */
2369 asection *got;
2370 asection *relgot;
2371
2372 union {
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* Used when adding symbols. */
2378 bfd_boolean has_dotsym;
2379 } u;
2380
2381 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2382 sections means we potentially need one of these for each input bfd. */
2383 union {
2384 bfd_signed_vma refcount;
2385 bfd_vma offset;
2386 } tlsld_got;
2387
2388 /* A copy of relocs before they are modified for --emit-relocs. */
2389 Elf_Internal_Rela *opd_relocs;
2390 };
2391
2392 #define ppc64_elf_tdata(bfd) \
2393 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2394
2395 #define ppc64_tlsld_got(bfd) \
2396 (&ppc64_elf_tdata (bfd)->tlsld_got)
2397
2398 /* Override the generic function because we store some extras. */
2399
2400 static bfd_boolean
2401 ppc64_elf_mkobject (bfd *abfd)
2402 {
2403 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2404 abfd->tdata.any = bfd_zalloc (abfd, amt);
2405 if (abfd->tdata.any == NULL)
2406 return FALSE;
2407 return TRUE;
2408 }
2409
2410 /* Return 1 if target is one of ours. */
2411
2412 static bfd_boolean
2413 is_ppc64_elf_target (const struct bfd_target *targ)
2414 {
2415 extern const bfd_target bfd_elf64_powerpc_vec;
2416 extern const bfd_target bfd_elf64_powerpcle_vec;
2417
2418 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2419 }
2420
2421 /* Fix bad default arch selected for a 64 bit input bfd when the
2422 default is 32 bit. */
2423
2424 static bfd_boolean
2425 ppc64_elf_object_p (bfd *abfd)
2426 {
2427 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2428 {
2429 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2430
2431 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2432 {
2433 /* Relies on arch after 32 bit default being 64 bit default. */
2434 abfd->arch_info = abfd->arch_info->next;
2435 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2436 }
2437 }
2438 return TRUE;
2439 }
2440
2441 /* Support for core dump NOTE sections. */
2442
2443 static bfd_boolean
2444 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2445 {
2446 size_t offset, size;
2447
2448 if (note->descsz != 504)
2449 return FALSE;
2450
2451 /* pr_cursig */
2452 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2453
2454 /* pr_pid */
2455 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2456
2457 /* pr_reg */
2458 offset = 112;
2459 size = 384;
2460
2461 /* Make a ".reg/999" section. */
2462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2463 size, note->descpos + offset);
2464 }
2465
2466 static bfd_boolean
2467 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2468 {
2469 if (note->descsz != 136)
2470 return FALSE;
2471
2472 elf_tdata (abfd)->core_program
2473 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2474 elf_tdata (abfd)->core_command
2475 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2476
2477 return TRUE;
2478 }
2479
2480 /* Merge backend specific data from an object file to the output
2481 object file when linking. */
2482
2483 static bfd_boolean
2484 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2485 {
2486 /* Check if we have the same endianess. */
2487 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2488 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2489 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2490 {
2491 const char *msg;
2492
2493 if (bfd_big_endian (ibfd))
2494 msg = _("%B: compiled for a big endian system "
2495 "and target is little endian");
2496 else
2497 msg = _("%B: compiled for a little endian system "
2498 "and target is big endian");
2499
2500 (*_bfd_error_handler) (msg, ibfd);
2501
2502 bfd_set_error (bfd_error_wrong_format);
2503 return FALSE;
2504 }
2505
2506 return TRUE;
2507 }
2508
2509 /* Add extra PPC sections. */
2510
2511 static struct bfd_elf_special_section const
2512 ppc64_special_sections_p[]=
2513 {
2514 { ".plt", 4, 0, SHT_NOBITS, 0 },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 static struct bfd_elf_special_section const
2519 ppc64_special_sections_s[]=
2520 {
2521 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2523 { NULL, 0, 0, 0, 0 }
2524 };
2525
2526 static struct bfd_elf_special_section const
2527 ppc64_special_sections_t[]=
2528 {
2529 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2530 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2531 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2532 { NULL, 0, 0, 0, 0 }
2533 };
2534
2535 static struct bfd_elf_special_section const *
2536 ppc64_elf_special_sections[27]=
2537 {
2538 NULL, /* 'a' */
2539 NULL, /* 'b' */
2540 NULL, /* 'c' */
2541 NULL, /* 'd' */
2542 NULL, /* 'e' */
2543 NULL, /* 'f' */
2544 NULL, /* 'g' */
2545 NULL, /* 'h' */
2546 NULL, /* 'i' */
2547 NULL, /* 'j' */
2548 NULL, /* 'k' */
2549 NULL, /* 'l' */
2550 NULL, /* 'm' */
2551 NULL, /* 'n' */
2552 NULL, /* 'o' */
2553 ppc64_special_sections_p, /* 'p' */
2554 NULL, /* 'q' */
2555 NULL, /* 'r' */
2556 ppc64_special_sections_s, /* 's' */
2557 ppc64_special_sections_t, /* 't' */
2558 NULL, /* 'u' */
2559 NULL, /* 'v' */
2560 NULL, /* 'w' */
2561 NULL, /* 'x' */
2562 NULL, /* 'y' */
2563 NULL, /* 'z' */
2564 NULL /* other */
2565 };
2566
2567 struct _ppc64_elf_section_data
2568 {
2569 struct bfd_elf_section_data elf;
2570
2571 /* An array with one entry for each opd function descriptor. */
2572 union
2573 {
2574 /* Points to the function code section for local opd entries. */
2575 asection **func_sec;
2576 /* After editing .opd, adjust references to opd local syms. */
2577 long *adjust;
2578 } opd;
2579
2580 /* An array for toc sections, indexed by offset/8.
2581 Specifies the relocation symbol index used at a given toc offset. */
2582 unsigned *t_symndx;
2583 };
2584
2585 #define ppc64_elf_section_data(sec) \
2586 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2587
2588 static bfd_boolean
2589 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2590 {
2591 struct _ppc64_elf_section_data *sdata;
2592 bfd_size_type amt = sizeof (*sdata);
2593
2594 sdata = bfd_zalloc (abfd, amt);
2595 if (sdata == NULL)
2596 return FALSE;
2597 sec->used_by_bfd = sdata;
2598
2599 return _bfd_elf_new_section_hook (abfd, sec);
2600 }
2601
2602 static void *
2603 get_opd_info (asection * sec)
2604 {
2605 if (sec != NULL
2606 && ppc64_elf_section_data (sec) != NULL
2607 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2608 return ppc64_elf_section_data (sec)->opd.adjust;
2609 return NULL;
2610 }
2611 \f
2612 /* Parameters for the qsort hook. */
2613 static asection *synthetic_opd;
2614 static bfd_boolean synthetic_relocatable;
2615
2616 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2617
2618 static int
2619 compare_symbols (const void *ap, const void *bp)
2620 {
2621 const asymbol *a = * (const asymbol **) ap;
2622 const asymbol *b = * (const asymbol **) bp;
2623
2624 /* Section symbols first. */
2625 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2626 return -1;
2627 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2628 return 1;
2629
2630 /* then .opd symbols. */
2631 if (a->section == synthetic_opd && b->section != synthetic_opd)
2632 return -1;
2633 if (a->section != synthetic_opd && b->section == synthetic_opd)
2634 return 1;
2635
2636 /* then other code symbols. */
2637 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2638 == (SEC_CODE | SEC_ALLOC)
2639 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2640 != (SEC_CODE | SEC_ALLOC))
2641 return -1;
2642
2643 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2644 != (SEC_CODE | SEC_ALLOC)
2645 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2646 == (SEC_CODE | SEC_ALLOC))
2647 return 1;
2648
2649 if (synthetic_relocatable)
2650 {
2651 if (a->section->id < b->section->id)
2652 return -1;
2653
2654 if (a->section->id > b->section->id)
2655 return 1;
2656 }
2657
2658 if (a->value + a->section->vma < b->value + b->section->vma)
2659 return -1;
2660
2661 if (a->value + a->section->vma > b->value + b->section->vma)
2662 return 1;
2663
2664 return 0;
2665 }
2666
2667 /* Search SYMS for a symbol of the given VALUE. */
2668
2669 static asymbol *
2670 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2671 {
2672 long mid;
2673
2674 if (id == -1)
2675 {
2676 while (lo < hi)
2677 {
2678 mid = (lo + hi) >> 1;
2679 if (syms[mid]->value + syms[mid]->section->vma < value)
2680 lo = mid + 1;
2681 else if (syms[mid]->value + syms[mid]->section->vma > value)
2682 hi = mid;
2683 else
2684 return syms[mid];
2685 }
2686 }
2687 else
2688 {
2689 while (lo < hi)
2690 {
2691 mid = (lo + hi) >> 1;
2692 if (syms[mid]->section->id < id)
2693 lo = mid + 1;
2694 else if (syms[mid]->section->id > id)
2695 hi = mid;
2696 else if (syms[mid]->value < value)
2697 lo = mid + 1;
2698 else if (syms[mid]->value > value)
2699 hi = mid;
2700 else
2701 return syms[mid];
2702 }
2703 }
2704 return NULL;
2705 }
2706
2707 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2708 entry syms. */
2709
2710 static long
2711 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2712 long static_count, asymbol **static_syms,
2713 long dyn_count, asymbol **dyn_syms,
2714 asymbol **ret)
2715 {
2716 asymbol *s;
2717 long i;
2718 long count;
2719 char *names;
2720 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2721 asection *opd;
2722 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2723 asymbol **syms;
2724
2725 *ret = NULL;
2726
2727 opd = bfd_get_section_by_name (abfd, ".opd");
2728 if (opd == NULL)
2729 return 0;
2730
2731 symcount = static_count;
2732 if (!relocatable)
2733 symcount += dyn_count;
2734 if (symcount == 0)
2735 return 0;
2736
2737 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2738 if (syms == NULL)
2739 return -1;
2740
2741 if (!relocatable && static_count != 0 && dyn_count != 0)
2742 {
2743 /* Use both symbol tables. */
2744 memcpy (syms, static_syms, static_count * sizeof (*syms));
2745 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2746 }
2747 else if (!relocatable && static_count == 0)
2748 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2749 else
2750 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2751
2752 synthetic_opd = opd;
2753 synthetic_relocatable = relocatable;
2754 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2755
2756 if (!relocatable && symcount > 1)
2757 {
2758 long j;
2759 /* Trim duplicate syms, since we may have merged the normal and
2760 dynamic symbols. Actually, we only care about syms that have
2761 different values, so trim any with the same value. */
2762 for (i = 1, j = 1; i < symcount; ++i)
2763 if (syms[i - 1]->value + syms[i - 1]->section->vma
2764 != syms[i]->value + syms[i]->section->vma)
2765 syms[j++] = syms[i];
2766 symcount = j;
2767 }
2768
2769 i = 0;
2770 if (syms[i]->section == opd)
2771 ++i;
2772 codesecsym = i;
2773
2774 for (; i < symcount; ++i)
2775 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2776 != (SEC_CODE | SEC_ALLOC))
2777 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2778 break;
2779 codesecsymend = i;
2780
2781 for (; i < symcount; ++i)
2782 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2783 break;
2784 secsymend = i;
2785
2786 for (; i < symcount; ++i)
2787 if (syms[i]->section != opd)
2788 break;
2789 opdsymend = i;
2790
2791 for (; i < symcount; ++i)
2792 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2793 != (SEC_CODE | SEC_ALLOC))
2794 break;
2795 symcount = i;
2796
2797 count = 0;
2798 if (opdsymend == secsymend)
2799 goto done;
2800
2801 if (relocatable)
2802 {
2803 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2804 arelent *r;
2805 size_t size;
2806 long relcount;
2807
2808 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2809 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2810 if (relcount == 0)
2811 goto done;
2812
2813 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2814 {
2815 count = -1;
2816 goto done;
2817 }
2818
2819 size = 0;
2820 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2821 {
2822 asymbol *sym;
2823
2824 while (r < opd->relocation + relcount
2825 && r->address < syms[i]->value + opd->vma)
2826 ++r;
2827
2828 if (r == opd->relocation + relcount)
2829 break;
2830
2831 if (r->address != syms[i]->value + opd->vma)
2832 continue;
2833
2834 if (r->howto->type != R_PPC64_ADDR64)
2835 continue;
2836
2837 sym = *r->sym_ptr_ptr;
2838 if (!sym_exists_at (syms, opdsymend, symcount,
2839 sym->section->id, sym->value + r->addend))
2840 {
2841 ++count;
2842 size += sizeof (asymbol);
2843 size += strlen (syms[i]->name) + 2;
2844 }
2845 }
2846
2847 s = *ret = bfd_malloc (size);
2848 if (s == NULL)
2849 {
2850 count = -1;
2851 goto done;
2852 }
2853
2854 names = (char *) (s + count);
2855
2856 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2857 {
2858 asymbol *sym;
2859
2860 while (r < opd->relocation + relcount
2861 && r->address < syms[i]->value + opd->vma)
2862 ++r;
2863
2864 if (r == opd->relocation + relcount)
2865 break;
2866
2867 if (r->address != syms[i]->value + opd->vma)
2868 continue;
2869
2870 if (r->howto->type != R_PPC64_ADDR64)
2871 continue;
2872
2873 sym = *r->sym_ptr_ptr;
2874 if (!sym_exists_at (syms, opdsymend, symcount,
2875 sym->section->id, sym->value + r->addend))
2876 {
2877 size_t len;
2878
2879 *s = *syms[i];
2880 s->section = sym->section;
2881 s->value = sym->value + r->addend;
2882 s->name = names;
2883 *names++ = '.';
2884 len = strlen (syms[i]->name);
2885 memcpy (names, syms[i]->name, len + 1);
2886 names += len + 1;
2887 s++;
2888 }
2889 }
2890 }
2891 else
2892 {
2893 bfd_byte *contents;
2894 size_t size;
2895
2896 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2897 {
2898 if (contents)
2899 {
2900 free_contents_and_exit:
2901 free (contents);
2902 }
2903 count = -1;
2904 goto done;
2905 }
2906
2907 size = 0;
2908 for (i = secsymend; i < opdsymend; ++i)
2909 {
2910 bfd_vma ent;
2911
2912 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2913 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2914 {
2915 ++count;
2916 size += sizeof (asymbol);
2917 size += strlen (syms[i]->name) + 2;
2918 }
2919 }
2920
2921 s = *ret = bfd_malloc (size);
2922 if (s == NULL)
2923 goto free_contents_and_exit;
2924
2925 names = (char *) (s + count);
2926
2927 for (i = secsymend; i < opdsymend; ++i)
2928 {
2929 bfd_vma ent;
2930
2931 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2932 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2933 {
2934 long lo, hi;
2935 size_t len;
2936 asection *sec = abfd->sections;
2937
2938 *s = *syms[i];
2939 lo = codesecsym;
2940 hi = codesecsymend;
2941 while (lo < hi)
2942 {
2943 long mid = (lo + hi) >> 1;
2944 if (syms[mid]->section->vma < ent)
2945 lo = mid + 1;
2946 else if (syms[mid]->section->vma > ent)
2947 hi = mid;
2948 else
2949 {
2950 sec = syms[mid]->section;
2951 break;
2952 }
2953 }
2954
2955 if (lo >= hi && lo > codesecsym)
2956 sec = syms[lo - 1]->section;
2957
2958 for (; sec != NULL; sec = sec->next)
2959 {
2960 if (sec->vma > ent)
2961 break;
2962 if ((sec->flags & SEC_ALLOC) == 0
2963 || (sec->flags & SEC_LOAD) == 0)
2964 break;
2965 if ((sec->flags & SEC_CODE) != 0)
2966 s->section = sec;
2967 }
2968 s->value = ent - s->section->vma;
2969 s->name = names;
2970 *names++ = '.';
2971 len = strlen (syms[i]->name);
2972 memcpy (names, syms[i]->name, len + 1);
2973 names += len + 1;
2974 s++;
2975 }
2976 }
2977 free (contents);
2978 }
2979
2980 done:
2981 free (syms);
2982 return count;
2983 }
2984 \f
2985 /* The following functions are specific to the ELF linker, while
2986 functions above are used generally. Those named ppc64_elf_* are
2987 called by the main ELF linker code. They appear in this file more
2988 or less in the order in which they are called. eg.
2989 ppc64_elf_check_relocs is called early in the link process,
2990 ppc64_elf_finish_dynamic_sections is one of the last functions
2991 called.
2992
2993 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2994 functions have both a function code symbol and a function descriptor
2995 symbol. A call to foo in a relocatable object file looks like:
2996
2997 . .text
2998 . x:
2999 . bl .foo
3000 . nop
3001
3002 The function definition in another object file might be:
3003
3004 . .section .opd
3005 . foo: .quad .foo
3006 . .quad .TOC.@tocbase
3007 . .quad 0
3008 .
3009 . .text
3010 . .foo: blr
3011
3012 When the linker resolves the call during a static link, the branch
3013 unsurprisingly just goes to .foo and the .opd information is unused.
3014 If the function definition is in a shared library, things are a little
3015 different: The call goes via a plt call stub, the opd information gets
3016 copied to the plt, and the linker patches the nop.
3017
3018 . x:
3019 . bl .foo_stub
3020 . ld 2,40(1)
3021 .
3022 .
3023 . .foo_stub:
3024 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3025 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3026 . std 2,40(1) # this is the general idea
3027 . ld 11,0(12)
3028 . ld 2,8(12)
3029 . mtctr 11
3030 . ld 11,16(12)
3031 . bctr
3032 .
3033 . .section .plt
3034 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3035
3036 The "reloc ()" notation is supposed to indicate that the linker emits
3037 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3038 copying.
3039
3040 What are the difficulties here? Well, firstly, the relocations
3041 examined by the linker in check_relocs are against the function code
3042 sym .foo, while the dynamic relocation in the plt is emitted against
3043 the function descriptor symbol, foo. Somewhere along the line, we need
3044 to carefully copy dynamic link information from one symbol to the other.
3045 Secondly, the generic part of the elf linker will make .foo a dynamic
3046 symbol as is normal for most other backends. We need foo dynamic
3047 instead, at least for an application final link. However, when
3048 creating a shared library containing foo, we need to have both symbols
3049 dynamic so that references to .foo are satisfied during the early
3050 stages of linking. Otherwise the linker might decide to pull in a
3051 definition from some other object, eg. a static library.
3052
3053 Update: As of August 2004, we support a new convention. Function
3054 calls may use the function descriptor symbol, ie. "bl foo". This
3055 behaves exactly as "bl .foo". */
3056
3057 /* The linker needs to keep track of the number of relocs that it
3058 decides to copy as dynamic relocs in check_relocs for each symbol.
3059 This is so that it can later discard them if they are found to be
3060 unnecessary. We store the information in a field extending the
3061 regular ELF linker hash table. */
3062
3063 struct ppc_dyn_relocs
3064 {
3065 struct ppc_dyn_relocs *next;
3066
3067 /* The input section of the reloc. */
3068 asection *sec;
3069
3070 /* Total number of relocs copied for the input section. */
3071 bfd_size_type count;
3072
3073 /* Number of pc-relative relocs copied for the input section. */
3074 bfd_size_type pc_count;
3075 };
3076
3077 /* Track GOT entries needed for a given symbol. We might need more
3078 than one got entry per symbol. */
3079 struct got_entry
3080 {
3081 struct got_entry *next;
3082
3083 /* The symbol addend that we'll be placing in the GOT. */
3084 bfd_vma addend;
3085
3086 /* Unlike other ELF targets, we use separate GOT entries for the same
3087 symbol referenced from different input files. This is to support
3088 automatic multiple TOC/GOT sections, where the TOC base can vary
3089 from one input file to another.
3090
3091 Point to the BFD owning this GOT entry. */
3092 bfd *owner;
3093
3094 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3095 TLS_TPREL or TLS_DTPREL for tls entries. */
3096 char tls_type;
3097
3098 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3099 union
3100 {
3101 bfd_signed_vma refcount;
3102 bfd_vma offset;
3103 } got;
3104 };
3105
3106 /* The same for PLT. */
3107 struct plt_entry
3108 {
3109 struct plt_entry *next;
3110
3111 bfd_vma addend;
3112
3113 union
3114 {
3115 bfd_signed_vma refcount;
3116 bfd_vma offset;
3117 } plt;
3118 };
3119
3120 /* Of those relocs that might be copied as dynamic relocs, this macro
3121 selects those that must be copied when linking a shared library,
3122 even when the symbol is local. */
3123
3124 #define MUST_BE_DYN_RELOC(RTYPE) \
3125 ((RTYPE) != R_PPC64_REL32 \
3126 && (RTYPE) != R_PPC64_REL64 \
3127 && (RTYPE) != R_PPC64_REL30)
3128
3129 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3130 copying dynamic variables from a shared lib into an app's dynbss
3131 section, and instead use a dynamic relocation to point into the
3132 shared lib. With code that gcc generates, it's vital that this be
3133 enabled; In the PowerPC64 ABI, the address of a function is actually
3134 the address of a function descriptor, which resides in the .opd
3135 section. gcc uses the descriptor directly rather than going via the
3136 GOT as some other ABI's do, which means that initialized function
3137 pointers must reference the descriptor. Thus, a function pointer
3138 initialized to the address of a function in a shared library will
3139 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3140 redefines the function descriptor symbol to point to the copy. This
3141 presents a problem as a plt entry for that function is also
3142 initialized from the function descriptor symbol and the copy reloc
3143 may not be initialized first. */
3144 #define ELIMINATE_COPY_RELOCS 1
3145
3146 /* Section name for stubs is the associated section name plus this
3147 string. */
3148 #define STUB_SUFFIX ".stub"
3149
3150 /* Linker stubs.
3151 ppc_stub_long_branch:
3152 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3153 destination, but a 24 bit branch in a stub section will reach.
3154 . b dest
3155
3156 ppc_stub_plt_branch:
3157 Similar to the above, but a 24 bit branch in the stub section won't
3158 reach its destination.
3159 . addis %r12,%r2,xxx@toc@ha
3160 . ld %r11,xxx@toc@l(%r12)
3161 . mtctr %r11
3162 . bctr
3163
3164 ppc_stub_plt_call:
3165 Used to call a function in a shared library. If it so happens that
3166 the plt entry referenced crosses a 64k boundary, then an extra
3167 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3168 xxx+16 as appropriate.
3169 . addis %r12,%r2,xxx@toc@ha
3170 . std %r2,40(%r1)
3171 . ld %r11,xxx+0@toc@l(%r12)
3172 . ld %r2,xxx+8@toc@l(%r12)
3173 . mtctr %r11
3174 . ld %r11,xxx+16@toc@l(%r12)
3175 . bctr
3176
3177 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3178 code to adjust the value and save r2 to support multiple toc sections.
3179 A ppc_stub_long_branch with an r2 offset looks like:
3180 . std %r2,40(%r1)
3181 . addis %r2,%r2,off@ha
3182 . addi %r2,%r2,off@l
3183 . b dest
3184
3185 A ppc_stub_plt_branch with an r2 offset looks like:
3186 . std %r2,40(%r1)
3187 . addis %r12,%r2,xxx@toc@ha
3188 . ld %r11,xxx@toc@l(%r12)
3189 . addis %r2,%r2,off@ha
3190 . addi %r2,%r2,off@l
3191 . mtctr %r11
3192 . bctr
3193 */
3194
3195 enum ppc_stub_type {
3196 ppc_stub_none,
3197 ppc_stub_long_branch,
3198 ppc_stub_long_branch_r2off,
3199 ppc_stub_plt_branch,
3200 ppc_stub_plt_branch_r2off,
3201 ppc_stub_plt_call
3202 };
3203
3204 struct ppc_stub_hash_entry {
3205
3206 /* Base hash table entry structure. */
3207 struct bfd_hash_entry root;
3208
3209 enum ppc_stub_type stub_type;
3210
3211 /* The stub section. */
3212 asection *stub_sec;
3213
3214 /* Offset within stub_sec of the beginning of this stub. */
3215 bfd_vma stub_offset;
3216
3217 /* Given the symbol's value and its section we can determine its final
3218 value when building the stubs (so the stub knows where to jump. */
3219 bfd_vma target_value;
3220 asection *target_section;
3221
3222 /* The symbol table entry, if any, that this was derived from. */
3223 struct ppc_link_hash_entry *h;
3224
3225 /* And the reloc addend that this was derived from. */
3226 bfd_vma addend;
3227
3228 /* Where this stub is being called from, or, in the case of combined
3229 stub sections, the first input section in the group. */
3230 asection *id_sec;
3231 };
3232
3233 struct ppc_branch_hash_entry {
3234
3235 /* Base hash table entry structure. */
3236 struct bfd_hash_entry root;
3237
3238 /* Offset within .branch_lt. */
3239 unsigned int offset;
3240
3241 /* Generation marker. */
3242 unsigned int iter;
3243 };
3244
3245 struct ppc_link_hash_entry
3246 {
3247 struct elf_link_hash_entry elf;
3248
3249 /* A pointer to the most recently used stub hash entry against this
3250 symbol. */
3251 struct ppc_stub_hash_entry *stub_cache;
3252
3253 /* Track dynamic relocs copied for this symbol. */
3254 struct ppc_dyn_relocs *dyn_relocs;
3255
3256 /* Link between function code and descriptor symbols. */
3257 struct ppc_link_hash_entry *oh;
3258
3259 /* Flag function code and descriptor symbols. */
3260 unsigned int is_func:1;
3261 unsigned int is_func_descriptor:1;
3262 unsigned int fake:1;
3263
3264 /* Whether global opd/toc sym has been adjusted or not.
3265 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3266 should be set for all globals defined in any opd/toc section. */
3267 unsigned int adjust_done:1;
3268
3269 /* Set if we twiddled this symbol to weak at some stage. */
3270 unsigned int was_undefined:1;
3271
3272 /* Contexts in which symbol is used in the GOT (or TOC).
3273 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3274 corresponding relocs are encountered during check_relocs.
3275 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3276 indicate the corresponding GOT entry type is not needed.
3277 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3278 a TPREL one. We use a separate flag rather than setting TPREL
3279 just for convenience in distinguishing the two cases. */
3280 #define TLS_GD 1 /* GD reloc. */
3281 #define TLS_LD 2 /* LD reloc. */
3282 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3283 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3284 #define TLS_TLS 16 /* Any TLS reloc. */
3285 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3286 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3287 char tls_mask;
3288 };
3289
3290 /* ppc64 ELF linker hash table. */
3291
3292 struct ppc_link_hash_table
3293 {
3294 struct elf_link_hash_table elf;
3295
3296 /* The stub hash table. */
3297 struct bfd_hash_table stub_hash_table;
3298
3299 /* Another hash table for plt_branch stubs. */
3300 struct bfd_hash_table branch_hash_table;
3301
3302 /* Linker stub bfd. */
3303 bfd *stub_bfd;
3304
3305 /* Linker call-backs. */
3306 asection * (*add_stub_section) (const char *, asection *);
3307 void (*layout_sections_again) (void);
3308
3309 /* Array to keep track of which stub sections have been created, and
3310 information on stub grouping. */
3311 struct map_stub {
3312 /* This is the section to which stubs in the group will be attached. */
3313 asection *link_sec;
3314 /* The stub section. */
3315 asection *stub_sec;
3316 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3317 bfd_vma toc_off;
3318 } *stub_group;
3319
3320 /* Temp used when calculating TOC pointers. */
3321 bfd_vma toc_curr;
3322
3323 /* Highest input section id. */
3324 int top_id;
3325
3326 /* Highest output section index. */
3327 int top_index;
3328
3329 /* List of input sections for each output section. */
3330 asection **input_list;
3331
3332 /* Short-cuts to get to dynamic linker sections. */
3333 asection *got;
3334 asection *plt;
3335 asection *relplt;
3336 asection *dynbss;
3337 asection *relbss;
3338 asection *glink;
3339 asection *sfpr;
3340 asection *brlt;
3341 asection *relbrlt;
3342
3343 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3344 struct ppc_link_hash_entry *tls_get_addr;
3345 struct ppc_link_hash_entry *tls_get_addr_fd;
3346
3347 /* Statistics. */
3348 unsigned long stub_count[ppc_stub_plt_call];
3349
3350 /* Number of stubs against global syms. */
3351 unsigned long stub_globals;
3352
3353 /* Set if we should emit symbols for stubs. */
3354 unsigned int emit_stub_syms:1;
3355
3356 /* Support for multiple toc sections. */
3357 unsigned int no_multi_toc:1;
3358 unsigned int multi_toc_needed:1;
3359
3360 /* Set on error. */
3361 unsigned int stub_error:1;
3362
3363 /* Flag set when small branches are detected. Used to
3364 select suitable defaults for the stub group size. */
3365 unsigned int has_14bit_branch:1;
3366
3367 /* Temp used by ppc64_elf_check_directives. */
3368 unsigned int twiddled_syms:1;
3369
3370 /* Incremented every time we size stubs. */
3371 unsigned int stub_iteration;
3372
3373 /* Small local sym to section mapping cache. */
3374 struct sym_sec_cache sym_sec;
3375 };
3376
3377 /* Rename some of the generic section flags to better document how they
3378 are used here. */
3379 #define has_toc_reloc has_gp_reloc
3380 #define makes_toc_func_call need_finalize_relax
3381 #define call_check_in_progress reloc_done
3382
3383 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3384
3385 #define ppc_hash_table(p) \
3386 ((struct ppc_link_hash_table *) ((p)->hash))
3387
3388 #define ppc_stub_hash_lookup(table, string, create, copy) \
3389 ((struct ppc_stub_hash_entry *) \
3390 bfd_hash_lookup ((table), (string), (create), (copy)))
3391
3392 #define ppc_branch_hash_lookup(table, string, create, copy) \
3393 ((struct ppc_branch_hash_entry *) \
3394 bfd_hash_lookup ((table), (string), (create), (copy)))
3395
3396 /* Create an entry in the stub hash table. */
3397
3398 static struct bfd_hash_entry *
3399 stub_hash_newfunc (struct bfd_hash_entry *entry,
3400 struct bfd_hash_table *table,
3401 const char *string)
3402 {
3403 /* Allocate the structure if it has not already been allocated by a
3404 subclass. */
3405 if (entry == NULL)
3406 {
3407 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3408 if (entry == NULL)
3409 return entry;
3410 }
3411
3412 /* Call the allocation method of the superclass. */
3413 entry = bfd_hash_newfunc (entry, table, string);
3414 if (entry != NULL)
3415 {
3416 struct ppc_stub_hash_entry *eh;
3417
3418 /* Initialize the local fields. */
3419 eh = (struct ppc_stub_hash_entry *) entry;
3420 eh->stub_type = ppc_stub_none;
3421 eh->stub_sec = NULL;
3422 eh->stub_offset = 0;
3423 eh->target_value = 0;
3424 eh->target_section = NULL;
3425 eh->h = NULL;
3426 eh->id_sec = NULL;
3427 }
3428
3429 return entry;
3430 }
3431
3432 /* Create an entry in the branch hash table. */
3433
3434 static struct bfd_hash_entry *
3435 branch_hash_newfunc (struct bfd_hash_entry *entry,
3436 struct bfd_hash_table *table,
3437 const char *string)
3438 {
3439 /* Allocate the structure if it has not already been allocated by a
3440 subclass. */
3441 if (entry == NULL)
3442 {
3443 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3444 if (entry == NULL)
3445 return entry;
3446 }
3447
3448 /* Call the allocation method of the superclass. */
3449 entry = bfd_hash_newfunc (entry, table, string);
3450 if (entry != NULL)
3451 {
3452 struct ppc_branch_hash_entry *eh;
3453
3454 /* Initialize the local fields. */
3455 eh = (struct ppc_branch_hash_entry *) entry;
3456 eh->offset = 0;
3457 eh->iter = 0;
3458 }
3459
3460 return entry;
3461 }
3462
3463 /* Create an entry in a ppc64 ELF linker hash table. */
3464
3465 static struct bfd_hash_entry *
3466 link_hash_newfunc (struct bfd_hash_entry *entry,
3467 struct bfd_hash_table *table,
3468 const char *string)
3469 {
3470 /* Allocate the structure if it has not already been allocated by a
3471 subclass. */
3472 if (entry == NULL)
3473 {
3474 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3475 if (entry == NULL)
3476 return entry;
3477 }
3478
3479 /* Call the allocation method of the superclass. */
3480 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3481 if (entry != NULL)
3482 {
3483 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3484
3485 memset (&eh->stub_cache, 0,
3486 (sizeof (struct ppc_link_hash_entry)
3487 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3488 }
3489
3490 return entry;
3491 }
3492
3493 /* Create a ppc64 ELF linker hash table. */
3494
3495 static struct bfd_link_hash_table *
3496 ppc64_elf_link_hash_table_create (bfd *abfd)
3497 {
3498 struct ppc_link_hash_table *htab;
3499 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3500
3501 htab = bfd_zmalloc (amt);
3502 if (htab == NULL)
3503 return NULL;
3504
3505 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3506 {
3507 free (htab);
3508 return NULL;
3509 }
3510
3511 /* Init the stub hash table too. */
3512 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3513 return NULL;
3514
3515 /* And the branch hash table. */
3516 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3517 return NULL;
3518
3519 /* Initializing two fields of the union is just cosmetic. We really
3520 only care about glist, but when compiled on a 32-bit host the
3521 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3522 debugger inspection of these fields look nicer. */
3523 htab->elf.init_got_refcount.refcount = 0;
3524 htab->elf.init_got_refcount.glist = NULL;
3525 htab->elf.init_plt_refcount.refcount = 0;
3526 htab->elf.init_plt_refcount.glist = NULL;
3527 htab->elf.init_got_offset.offset = 0;
3528 htab->elf.init_got_offset.glist = NULL;
3529 htab->elf.init_plt_offset.offset = 0;
3530 htab->elf.init_plt_offset.glist = NULL;
3531
3532 return &htab->elf.root;
3533 }
3534
3535 /* Free the derived linker hash table. */
3536
3537 static void
3538 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3539 {
3540 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3541
3542 bfd_hash_table_free (&ret->stub_hash_table);
3543 bfd_hash_table_free (&ret->branch_hash_table);
3544 _bfd_generic_link_hash_table_free (hash);
3545 }
3546
3547 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3548
3549 void
3550 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3551 {
3552 struct ppc_link_hash_table *htab;
3553
3554 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3555
3556 /* Always hook our dynamic sections into the first bfd, which is the
3557 linker created stub bfd. This ensures that the GOT header is at
3558 the start of the output TOC section. */
3559 htab = ppc_hash_table (info);
3560 htab->stub_bfd = abfd;
3561 htab->elf.dynobj = abfd;
3562 }
3563
3564 /* Build a name for an entry in the stub hash table. */
3565
3566 static char *
3567 ppc_stub_name (const asection *input_section,
3568 const asection *sym_sec,
3569 const struct ppc_link_hash_entry *h,
3570 const Elf_Internal_Rela *rel)
3571 {
3572 char *stub_name;
3573 bfd_size_type len;
3574
3575 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3576 offsets from a sym as a branch target? In fact, we could
3577 probably assume the addend is always zero. */
3578 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3579
3580 if (h)
3581 {
3582 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3583 stub_name = bfd_malloc (len);
3584 if (stub_name != NULL)
3585 {
3586 sprintf (stub_name, "%08x.%s+%x",
3587 input_section->id & 0xffffffff,
3588 h->elf.root.root.string,
3589 (int) rel->r_addend & 0xffffffff);
3590 }
3591 }
3592 else
3593 {
3594 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3595 stub_name = bfd_malloc (len);
3596 if (stub_name != NULL)
3597 {
3598 sprintf (stub_name, "%08x.%x:%x+%x",
3599 input_section->id & 0xffffffff,
3600 sym_sec->id & 0xffffffff,
3601 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3602 (int) rel->r_addend & 0xffffffff);
3603 }
3604 }
3605 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3606 stub_name[len - 2] = 0;
3607 return stub_name;
3608 }
3609
3610 /* Look up an entry in the stub hash. Stub entries are cached because
3611 creating the stub name takes a bit of time. */
3612
3613 static struct ppc_stub_hash_entry *
3614 ppc_get_stub_entry (const asection *input_section,
3615 const asection *sym_sec,
3616 struct ppc_link_hash_entry *h,
3617 const Elf_Internal_Rela *rel,
3618 struct ppc_link_hash_table *htab)
3619 {
3620 struct ppc_stub_hash_entry *stub_entry;
3621 const asection *id_sec;
3622
3623 /* If this input section is part of a group of sections sharing one
3624 stub section, then use the id of the first section in the group.
3625 Stub names need to include a section id, as there may well be
3626 more than one stub used to reach say, printf, and we need to
3627 distinguish between them. */
3628 id_sec = htab->stub_group[input_section->id].link_sec;
3629
3630 if (h != NULL && h->stub_cache != NULL
3631 && h->stub_cache->h == h
3632 && h->stub_cache->id_sec == id_sec)
3633 {
3634 stub_entry = h->stub_cache;
3635 }
3636 else
3637 {
3638 char *stub_name;
3639
3640 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3641 if (stub_name == NULL)
3642 return NULL;
3643
3644 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3645 stub_name, FALSE, FALSE);
3646 if (h != NULL)
3647 h->stub_cache = stub_entry;
3648
3649 free (stub_name);
3650 }
3651
3652 return stub_entry;
3653 }
3654
3655 /* Add a new stub entry to the stub hash. Not all fields of the new
3656 stub entry are initialised. */
3657
3658 static struct ppc_stub_hash_entry *
3659 ppc_add_stub (const char *stub_name,
3660 asection *section,
3661 struct ppc_link_hash_table *htab)
3662 {
3663 asection *link_sec;
3664 asection *stub_sec;
3665 struct ppc_stub_hash_entry *stub_entry;
3666
3667 link_sec = htab->stub_group[section->id].link_sec;
3668 stub_sec = htab->stub_group[section->id].stub_sec;
3669 if (stub_sec == NULL)
3670 {
3671 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3672 if (stub_sec == NULL)
3673 {
3674 size_t namelen;
3675 bfd_size_type len;
3676 char *s_name;
3677
3678 namelen = strlen (link_sec->name);
3679 len = namelen + sizeof (STUB_SUFFIX);
3680 s_name = bfd_alloc (htab->stub_bfd, len);
3681 if (s_name == NULL)
3682 return NULL;
3683
3684 memcpy (s_name, link_sec->name, namelen);
3685 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3686 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3687 if (stub_sec == NULL)
3688 return NULL;
3689 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3690 }
3691 htab->stub_group[section->id].stub_sec = stub_sec;
3692 }
3693
3694 /* Enter this entry into the linker stub hash table. */
3695 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3696 TRUE, FALSE);
3697 if (stub_entry == NULL)
3698 {
3699 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3700 section->owner, stub_name);
3701 return NULL;
3702 }
3703
3704 stub_entry->stub_sec = stub_sec;
3705 stub_entry->stub_offset = 0;
3706 stub_entry->id_sec = link_sec;
3707 return stub_entry;
3708 }
3709
3710 /* Create sections for linker generated code. */
3711
3712 static bfd_boolean
3713 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3714 {
3715 struct ppc_link_hash_table *htab;
3716 flagword flags;
3717
3718 htab = ppc_hash_table (info);
3719
3720 /* Create .sfpr for code to save and restore fp regs. */
3721 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3722 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3723 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3724 flags);
3725 if (htab->sfpr == NULL
3726 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3727 return FALSE;
3728
3729 /* Create .glink for lazy dynamic linking support. */
3730 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3731 flags);
3732 if (htab->glink == NULL
3733 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3734 return FALSE;
3735
3736 /* Create .branch_lt for plt_branch stubs. */
3737 flags = (SEC_ALLOC | SEC_LOAD
3738 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3739 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3740 flags);
3741 if (htab->brlt == NULL
3742 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3743 return FALSE;
3744
3745 if (info->shared || info->emitrelocations)
3746 {
3747 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3748 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3749 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3750 ".rela.branch_lt",
3751 flags);
3752 if (!htab->relbrlt
3753 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3754 return FALSE;
3755 }
3756 return TRUE;
3757 }
3758
3759 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3760 not already done. */
3761
3762 static bfd_boolean
3763 create_got_section (bfd *abfd, struct bfd_link_info *info)
3764 {
3765 asection *got, *relgot;
3766 flagword flags;
3767 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3768
3769 if (!htab->got)
3770 {
3771 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3772 return FALSE;
3773
3774 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3775 if (!htab->got)
3776 abort ();
3777 }
3778
3779 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3780 | SEC_LINKER_CREATED);
3781
3782 got = bfd_make_section_with_flags (abfd, ".got", flags);
3783 if (!got
3784 || !bfd_set_section_alignment (abfd, got, 3))
3785 return FALSE;
3786
3787 relgot = bfd_make_section_with_flags (abfd, ".rela.got",
3788 flags | SEC_READONLY);
3789 if (!relgot
3790 || ! bfd_set_section_alignment (abfd, relgot, 3))
3791 return FALSE;
3792
3793 ppc64_elf_tdata (abfd)->got = got;
3794 ppc64_elf_tdata (abfd)->relgot = relgot;
3795 return TRUE;
3796 }
3797
3798 /* Create the dynamic sections, and set up shortcuts. */
3799
3800 static bfd_boolean
3801 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3802 {
3803 struct ppc_link_hash_table *htab;
3804
3805 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3806 return FALSE;
3807
3808 htab = ppc_hash_table (info);
3809 if (!htab->got)
3810 htab->got = bfd_get_section_by_name (dynobj, ".got");
3811 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3812 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3813 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3814 if (!info->shared)
3815 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3816
3817 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3818 || (!info->shared && !htab->relbss))
3819 abort ();
3820
3821 return TRUE;
3822 }
3823
3824 /* Merge PLT info on FROM with that on TO. */
3825
3826 static void
3827 move_plt_plist (struct ppc_link_hash_entry *from,
3828 struct ppc_link_hash_entry *to)
3829 {
3830 if (from->elf.plt.plist != NULL)
3831 {
3832 if (to->elf.plt.plist != NULL)
3833 {
3834 struct plt_entry **entp;
3835 struct plt_entry *ent;
3836
3837 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3838 {
3839 struct plt_entry *dent;
3840
3841 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3842 if (dent->addend == ent->addend)
3843 {
3844 dent->plt.refcount += ent->plt.refcount;
3845 *entp = ent->next;
3846 break;
3847 }
3848 if (dent == NULL)
3849 entp = &ent->next;
3850 }
3851 *entp = to->elf.plt.plist;
3852 }
3853
3854 to->elf.plt.plist = from->elf.plt.plist;
3855 from->elf.plt.plist = NULL;
3856 }
3857 }
3858
3859 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3860
3861 static void
3862 ppc64_elf_copy_indirect_symbol
3863 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3864 struct elf_link_hash_entry *dir,
3865 struct elf_link_hash_entry *ind)
3866 {
3867 struct ppc_link_hash_entry *edir, *eind;
3868
3869 edir = (struct ppc_link_hash_entry *) dir;
3870 eind = (struct ppc_link_hash_entry *) ind;
3871
3872 /* Copy over any dynamic relocs we may have on the indirect sym. */
3873 if (eind->dyn_relocs != NULL)
3874 {
3875 if (edir->dyn_relocs != NULL)
3876 {
3877 struct ppc_dyn_relocs **pp;
3878 struct ppc_dyn_relocs *p;
3879
3880 if (eind->elf.root.type == bfd_link_hash_indirect)
3881 abort ();
3882
3883 /* Add reloc counts against the weak sym to the strong sym
3884 list. Merge any entries against the same section. */
3885 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3886 {
3887 struct ppc_dyn_relocs *q;
3888
3889 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3890 if (q->sec == p->sec)
3891 {
3892 q->pc_count += p->pc_count;
3893 q->count += p->count;
3894 *pp = p->next;
3895 break;
3896 }
3897 if (q == NULL)
3898 pp = &p->next;
3899 }
3900 *pp = edir->dyn_relocs;
3901 }
3902
3903 edir->dyn_relocs = eind->dyn_relocs;
3904 eind->dyn_relocs = NULL;
3905 }
3906
3907 edir->is_func |= eind->is_func;
3908 edir->is_func_descriptor |= eind->is_func_descriptor;
3909 edir->tls_mask |= eind->tls_mask;
3910
3911 /* If called to transfer flags for a weakdef during processing
3912 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3913 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3914 if (!(ELIMINATE_COPY_RELOCS
3915 && eind->elf.root.type != bfd_link_hash_indirect
3916 && edir->elf.dynamic_adjusted))
3917 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3918
3919 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3920 edir->elf.ref_regular |= eind->elf.ref_regular;
3921 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3922 edir->elf.needs_plt |= eind->elf.needs_plt;
3923
3924 /* If we were called to copy over info for a weak sym, that's all. */
3925 if (eind->elf.root.type != bfd_link_hash_indirect)
3926 return;
3927
3928 /* Copy over got entries that we may have already seen to the
3929 symbol which just became indirect. */
3930 if (eind->elf.got.glist != NULL)
3931 {
3932 if (edir->elf.got.glist != NULL)
3933 {
3934 struct got_entry **entp;
3935 struct got_entry *ent;
3936
3937 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3938 {
3939 struct got_entry *dent;
3940
3941 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3942 if (dent->addend == ent->addend
3943 && dent->owner == ent->owner
3944 && dent->tls_type == ent->tls_type)
3945 {
3946 dent->got.refcount += ent->got.refcount;
3947 *entp = ent->next;
3948 break;
3949 }
3950 if (dent == NULL)
3951 entp = &ent->next;
3952 }
3953 *entp = edir->elf.got.glist;
3954 }
3955
3956 edir->elf.got.glist = eind->elf.got.glist;
3957 eind->elf.got.glist = NULL;
3958 }
3959
3960 /* And plt entries. */
3961 move_plt_plist (eind, edir);
3962
3963 if (edir->elf.dynindx == -1)
3964 {
3965 edir->elf.dynindx = eind->elf.dynindx;
3966 edir->elf.dynstr_index = eind->elf.dynstr_index;
3967 eind->elf.dynindx = -1;
3968 eind->elf.dynstr_index = 0;
3969 }
3970 else
3971 BFD_ASSERT (eind->elf.dynindx == -1);
3972 }
3973
3974 /* Find the function descriptor hash entry from the given function code
3975 hash entry FH. Link the entries via their OH fields. */
3976
3977 static struct ppc_link_hash_entry *
3978 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3979 {
3980 struct ppc_link_hash_entry *fdh = fh->oh;
3981
3982 if (fdh == NULL)
3983 {
3984 const char *fd_name = fh->elf.root.root.string + 1;
3985
3986 fdh = (struct ppc_link_hash_entry *)
3987 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3988 if (fdh != NULL)
3989 {
3990 fdh->is_func_descriptor = 1;
3991 fdh->oh = fh;
3992 fh->is_func = 1;
3993 fh->oh = fdh;
3994 }
3995 }
3996
3997 return fdh;
3998 }
3999
4000 /* Make a fake function descriptor sym for the code sym FH. */
4001
4002 static struct ppc_link_hash_entry *
4003 make_fdh (struct bfd_link_info *info,
4004 struct ppc_link_hash_entry *fh)
4005 {
4006 bfd *abfd;
4007 asymbol *newsym;
4008 struct bfd_link_hash_entry *bh;
4009 struct ppc_link_hash_entry *fdh;
4010
4011 abfd = fh->elf.root.u.undef.abfd;
4012 newsym = bfd_make_empty_symbol (abfd);
4013 newsym->name = fh->elf.root.root.string + 1;
4014 newsym->section = bfd_und_section_ptr;
4015 newsym->value = 0;
4016 newsym->flags = BSF_WEAK;
4017
4018 bh = NULL;
4019 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4020 newsym->flags, newsym->section,
4021 newsym->value, NULL, FALSE, FALSE,
4022 &bh))
4023 return NULL;
4024
4025 fdh = (struct ppc_link_hash_entry *) bh;
4026 fdh->elf.non_elf = 0;
4027 fdh->fake = 1;
4028 fdh->is_func_descriptor = 1;
4029 fdh->oh = fh;
4030 fh->is_func = 1;
4031 fh->oh = fdh;
4032 return fdh;
4033 }
4034
4035 /* Hacks to support old ABI code.
4036 When making function calls, old ABI code references function entry
4037 points (dot symbols), while new ABI code references the function
4038 descriptor symbol. We need to make any combination of reference and
4039 definition work together, without breaking archive linking.
4040
4041 For a defined function "foo" and an undefined call to "bar":
4042 An old object defines "foo" and ".foo", references ".bar" (possibly
4043 "bar" too).
4044 A new object defines "foo" and references "bar".
4045
4046 A new object thus has no problem with its undefined symbols being
4047 satisfied by definitions in an old object. On the other hand, the
4048 old object won't have ".bar" satisfied by a new object. */
4049
4050 /* Fix function descriptor symbols defined in .opd sections to be
4051 function type. */
4052
4053 static bfd_boolean
4054 ppc64_elf_add_symbol_hook (bfd *ibfd,
4055 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4056 Elf_Internal_Sym *isym,
4057 const char **name,
4058 flagword *flags ATTRIBUTE_UNUSED,
4059 asection **sec,
4060 bfd_vma *value ATTRIBUTE_UNUSED)
4061 {
4062 if (*sec != NULL
4063 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4064 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4065
4066 if ((*name)[0] == '.'
4067 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4068 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4069 && is_ppc64_elf_target (ibfd->xvec))
4070 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4071
4072 return TRUE;
4073 }
4074
4075 /* This function makes an old ABI object reference to ".bar" cause the
4076 inclusion of a new ABI object archive that defines "bar".
4077 NAME is a symbol defined in an archive. Return a symbol in the hash
4078 table that might be satisfied by the archive symbols. */
4079
4080 static struct elf_link_hash_entry *
4081 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4082 struct bfd_link_info *info,
4083 const char *name)
4084 {
4085 struct elf_link_hash_entry *h;
4086 char *dot_name;
4087 size_t len;
4088
4089 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4090 if (h != NULL
4091 /* Don't return this sym if it is a fake function descriptor
4092 created by add_symbol_adjust. */
4093 && !(h->root.type == bfd_link_hash_undefweak
4094 && ((struct ppc_link_hash_entry *) h)->fake))
4095 return h;
4096
4097 if (name[0] == '.')
4098 return h;
4099
4100 len = strlen (name);
4101 dot_name = bfd_alloc (abfd, len + 2);
4102 if (dot_name == NULL)
4103 return (struct elf_link_hash_entry *) 0 - 1;
4104 dot_name[0] = '.';
4105 memcpy (dot_name + 1, name, len + 1);
4106 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4107 bfd_release (abfd, dot_name);
4108 return h;
4109 }
4110
4111 /* This function satisfies all old ABI object references to ".bar" if a
4112 new ABI object defines "bar". Well, at least, undefined dot symbols
4113 are made weak. This stops later archive searches from including an
4114 object if we already have a function descriptor definition. It also
4115 prevents the linker complaining about undefined symbols.
4116 We also check and correct mismatched symbol visibility here. The
4117 most restrictive visibility of the function descriptor and the
4118 function entry symbol is used. */
4119
4120 struct add_symbol_adjust_data
4121 {
4122 struct bfd_link_info *info;
4123 bfd_boolean ok;
4124 };
4125
4126 static bfd_boolean
4127 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4128 {
4129 struct add_symbol_adjust_data *data;
4130 struct ppc_link_hash_table *htab;
4131 struct ppc_link_hash_entry *eh;
4132 struct ppc_link_hash_entry *fdh;
4133
4134 if (h->root.type == bfd_link_hash_indirect)
4135 return TRUE;
4136
4137 if (h->root.type == bfd_link_hash_warning)
4138 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4139
4140 if (h->root.root.string[0] != '.')
4141 return TRUE;
4142
4143 data = inf;
4144 htab = ppc_hash_table (data->info);
4145 eh = (struct ppc_link_hash_entry *) h;
4146 fdh = get_fdh (eh, htab);
4147 if (fdh == NULL
4148 && !data->info->relocatable
4149 && (eh->elf.root.type == bfd_link_hash_undefined
4150 || eh->elf.root.type == bfd_link_hash_undefweak)
4151 && eh->elf.ref_regular)
4152 {
4153 /* Make an undefweak function descriptor sym, which is enough to
4154 pull in an --as-needed shared lib, but won't cause link
4155 errors. Archives are handled elsewhere. */
4156 fdh = make_fdh (data->info, eh);
4157 if (fdh == NULL)
4158 data->ok = FALSE;
4159 else
4160 fdh->elf.ref_regular = 1;
4161 }
4162 else if (fdh != NULL
4163 && (fdh->elf.root.type == bfd_link_hash_defined
4164 || fdh->elf.root.type == bfd_link_hash_defweak))
4165 {
4166 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4167 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4168 if (entry_vis < descr_vis)
4169 fdh->elf.other += entry_vis - descr_vis;
4170 else if (entry_vis > descr_vis)
4171 eh->elf.other += descr_vis - entry_vis;
4172
4173 if (eh->elf.root.type == bfd_link_hash_undefined)
4174 {
4175 eh->elf.root.type = bfd_link_hash_undefweak;
4176 eh->was_undefined = 1;
4177 htab->twiddled_syms = 1;
4178 }
4179 }
4180
4181 return TRUE;
4182 }
4183
4184 static bfd_boolean
4185 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4186 {
4187 struct ppc_link_hash_table *htab;
4188 struct add_symbol_adjust_data data;
4189
4190 if (!is_ppc64_elf_target (abfd->xvec))
4191 return TRUE;
4192
4193 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4194 return TRUE;
4195 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4196
4197 htab = ppc_hash_table (info);
4198 if (!is_ppc64_elf_target (htab->elf.root.creator))
4199 return TRUE;
4200
4201 data.info = info;
4202 data.ok = TRUE;
4203 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4204
4205 /* We need to fix the undefs list for any syms we have twiddled to
4206 undef_weak. */
4207 if (htab->twiddled_syms)
4208 {
4209 bfd_link_repair_undef_list (&htab->elf.root);
4210 htab->twiddled_syms = 0;
4211 }
4212 return data.ok;
4213 }
4214
4215 static bfd_boolean
4216 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4217 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4218 {
4219 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4220 char *local_got_tls_masks;
4221
4222 if (local_got_ents == NULL)
4223 {
4224 bfd_size_type size = symtab_hdr->sh_info;
4225
4226 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4227 local_got_ents = bfd_zalloc (abfd, size);
4228 if (local_got_ents == NULL)
4229 return FALSE;
4230 elf_local_got_ents (abfd) = local_got_ents;
4231 }
4232
4233 if ((tls_type & TLS_EXPLICIT) == 0)
4234 {
4235 struct got_entry *ent;
4236
4237 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4238 if (ent->addend == r_addend
4239 && ent->owner == abfd
4240 && ent->tls_type == tls_type)
4241 break;
4242 if (ent == NULL)
4243 {
4244 bfd_size_type amt = sizeof (*ent);
4245 ent = bfd_alloc (abfd, amt);
4246 if (ent == NULL)
4247 return FALSE;
4248 ent->next = local_got_ents[r_symndx];
4249 ent->addend = r_addend;
4250 ent->owner = abfd;
4251 ent->tls_type = tls_type;
4252 ent->got.refcount = 0;
4253 local_got_ents[r_symndx] = ent;
4254 }
4255 ent->got.refcount += 1;
4256 }
4257
4258 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4259 local_got_tls_masks[r_symndx] |= tls_type;
4260 return TRUE;
4261 }
4262
4263 static bfd_boolean
4264 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4265 {
4266 struct plt_entry *ent;
4267
4268 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4269 if (ent->addend == addend)
4270 break;
4271 if (ent == NULL)
4272 {
4273 bfd_size_type amt = sizeof (*ent);
4274 ent = bfd_alloc (abfd, amt);
4275 if (ent == NULL)
4276 return FALSE;
4277 ent->next = eh->elf.plt.plist;
4278 ent->addend = addend;
4279 ent->plt.refcount = 0;
4280 eh->elf.plt.plist = ent;
4281 }
4282 ent->plt.refcount += 1;
4283 eh->elf.needs_plt = 1;
4284 if (eh->elf.root.root.string[0] == '.'
4285 && eh->elf.root.root.string[1] != '\0')
4286 eh->is_func = 1;
4287 return TRUE;
4288 }
4289
4290 /* Look through the relocs for a section during the first phase, and
4291 calculate needed space in the global offset table, procedure
4292 linkage table, and dynamic reloc sections. */
4293
4294 static bfd_boolean
4295 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4296 asection *sec, const Elf_Internal_Rela *relocs)
4297 {
4298 struct ppc_link_hash_table *htab;
4299 Elf_Internal_Shdr *symtab_hdr;
4300 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4301 const Elf_Internal_Rela *rel;
4302 const Elf_Internal_Rela *rel_end;
4303 asection *sreloc;
4304 asection **opd_sym_map;
4305
4306 if (info->relocatable)
4307 return TRUE;
4308
4309 /* Don't do anything special with non-loaded, non-alloced sections.
4310 In particular, any relocs in such sections should not affect GOT
4311 and PLT reference counting (ie. we don't allow them to create GOT
4312 or PLT entries), there's no possibility or desire to optimize TLS
4313 relocs, and there's not much point in propagating relocs to shared
4314 libs that the dynamic linker won't relocate. */
4315 if ((sec->flags & SEC_ALLOC) == 0)
4316 return TRUE;
4317
4318 htab = ppc_hash_table (info);
4319 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4320
4321 sym_hashes = elf_sym_hashes (abfd);
4322 sym_hashes_end = (sym_hashes
4323 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4324 - symtab_hdr->sh_info);
4325
4326 sreloc = NULL;
4327 opd_sym_map = NULL;
4328 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4329 {
4330 /* Garbage collection needs some extra help with .opd sections.
4331 We don't want to necessarily keep everything referenced by
4332 relocs in .opd, as that would keep all functions. Instead,
4333 if we reference an .opd symbol (a function descriptor), we
4334 want to keep the function code symbol's section. This is
4335 easy for global symbols, but for local syms we need to keep
4336 information about the associated function section. Later, if
4337 edit_opd deletes entries, we'll use this array to adjust
4338 local syms in .opd. */
4339 union opd_info {
4340 asection *func_section;
4341 long entry_adjust;
4342 };
4343 bfd_size_type amt;
4344
4345 amt = sec->size * sizeof (union opd_info) / 8;
4346 opd_sym_map = bfd_zalloc (abfd, amt);
4347 if (opd_sym_map == NULL)
4348 return FALSE;
4349 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4350 }
4351
4352 if (htab->sfpr == NULL
4353 && !create_linkage_sections (htab->elf.dynobj, info))
4354 return FALSE;
4355
4356 rel_end = relocs + sec->reloc_count;
4357 for (rel = relocs; rel < rel_end; rel++)
4358 {
4359 unsigned long r_symndx;
4360 struct elf_link_hash_entry *h;
4361 enum elf_ppc64_reloc_type r_type;
4362 int tls_type = 0;
4363
4364 r_symndx = ELF64_R_SYM (rel->r_info);
4365 if (r_symndx < symtab_hdr->sh_info)
4366 h = NULL;
4367 else
4368 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4369
4370 r_type = ELF64_R_TYPE (rel->r_info);
4371 switch (r_type)
4372 {
4373 case R_PPC64_GOT_TLSLD16:
4374 case R_PPC64_GOT_TLSLD16_LO:
4375 case R_PPC64_GOT_TLSLD16_HI:
4376 case R_PPC64_GOT_TLSLD16_HA:
4377 ppc64_tlsld_got (abfd)->refcount += 1;
4378 tls_type = TLS_TLS | TLS_LD;
4379 goto dogottls;
4380
4381 case R_PPC64_GOT_TLSGD16:
4382 case R_PPC64_GOT_TLSGD16_LO:
4383 case R_PPC64_GOT_TLSGD16_HI:
4384 case R_PPC64_GOT_TLSGD16_HA:
4385 tls_type = TLS_TLS | TLS_GD;
4386 goto dogottls;
4387
4388 case R_PPC64_GOT_TPREL16_DS:
4389 case R_PPC64_GOT_TPREL16_LO_DS:
4390 case R_PPC64_GOT_TPREL16_HI:
4391 case R_PPC64_GOT_TPREL16_HA:
4392 if (info->shared)
4393 info->flags |= DF_STATIC_TLS;
4394 tls_type = TLS_TLS | TLS_TPREL;
4395 goto dogottls;
4396
4397 case R_PPC64_GOT_DTPREL16_DS:
4398 case R_PPC64_GOT_DTPREL16_LO_DS:
4399 case R_PPC64_GOT_DTPREL16_HI:
4400 case R_PPC64_GOT_DTPREL16_HA:
4401 tls_type = TLS_TLS | TLS_DTPREL;
4402 dogottls:
4403 sec->has_tls_reloc = 1;
4404 /* Fall thru */
4405
4406 case R_PPC64_GOT16:
4407 case R_PPC64_GOT16_DS:
4408 case R_PPC64_GOT16_HA:
4409 case R_PPC64_GOT16_HI:
4410 case R_PPC64_GOT16_LO:
4411 case R_PPC64_GOT16_LO_DS:
4412 /* This symbol requires a global offset table entry. */
4413 sec->has_toc_reloc = 1;
4414 if (ppc64_elf_tdata (abfd)->got == NULL
4415 && !create_got_section (abfd, info))
4416 return FALSE;
4417
4418 if (h != NULL)
4419 {
4420 struct ppc_link_hash_entry *eh;
4421 struct got_entry *ent;
4422
4423 eh = (struct ppc_link_hash_entry *) h;
4424 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4425 if (ent->addend == rel->r_addend
4426 && ent->owner == abfd
4427 && ent->tls_type == tls_type)
4428 break;
4429 if (ent == NULL)
4430 {
4431 bfd_size_type amt = sizeof (*ent);
4432 ent = bfd_alloc (abfd, amt);
4433 if (ent == NULL)
4434 return FALSE;
4435 ent->next = eh->elf.got.glist;
4436 ent->addend = rel->r_addend;
4437 ent->owner = abfd;
4438 ent->tls_type = tls_type;
4439 ent->got.refcount = 0;
4440 eh->elf.got.glist = ent;
4441 }
4442 ent->got.refcount += 1;
4443 eh->tls_mask |= tls_type;
4444 }
4445 else
4446 /* This is a global offset table entry for a local symbol. */
4447 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4448 rel->r_addend, tls_type))
4449 return FALSE;
4450 break;
4451
4452 case R_PPC64_PLT16_HA:
4453 case R_PPC64_PLT16_HI:
4454 case R_PPC64_PLT16_LO:
4455 case R_PPC64_PLT32:
4456 case R_PPC64_PLT64:
4457 /* This symbol requires a procedure linkage table entry. We
4458 actually build the entry in adjust_dynamic_symbol,
4459 because this might be a case of linking PIC code without
4460 linking in any dynamic objects, in which case we don't
4461 need to generate a procedure linkage table after all. */
4462 if (h == NULL)
4463 {
4464 /* It does not make sense to have a procedure linkage
4465 table entry for a local symbol. */
4466 bfd_set_error (bfd_error_bad_value);
4467 return FALSE;
4468 }
4469 else
4470 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4471 rel->r_addend))
4472 return FALSE;
4473 break;
4474
4475 /* The following relocations don't need to propagate the
4476 relocation if linking a shared object since they are
4477 section relative. */
4478 case R_PPC64_SECTOFF:
4479 case R_PPC64_SECTOFF_LO:
4480 case R_PPC64_SECTOFF_HI:
4481 case R_PPC64_SECTOFF_HA:
4482 case R_PPC64_SECTOFF_DS:
4483 case R_PPC64_SECTOFF_LO_DS:
4484 case R_PPC64_DTPREL16:
4485 case R_PPC64_DTPREL16_LO:
4486 case R_PPC64_DTPREL16_HI:
4487 case R_PPC64_DTPREL16_HA:
4488 case R_PPC64_DTPREL16_DS:
4489 case R_PPC64_DTPREL16_LO_DS:
4490 case R_PPC64_DTPREL16_HIGHER:
4491 case R_PPC64_DTPREL16_HIGHERA:
4492 case R_PPC64_DTPREL16_HIGHEST:
4493 case R_PPC64_DTPREL16_HIGHESTA:
4494 break;
4495
4496 /* Nor do these. */
4497 case R_PPC64_TOC16:
4498 case R_PPC64_TOC16_LO:
4499 case R_PPC64_TOC16_HI:
4500 case R_PPC64_TOC16_HA:
4501 case R_PPC64_TOC16_DS:
4502 case R_PPC64_TOC16_LO_DS:
4503 sec->has_toc_reloc = 1;
4504 break;
4505
4506 /* This relocation describes the C++ object vtable hierarchy.
4507 Reconstruct it for later use during GC. */
4508 case R_PPC64_GNU_VTINHERIT:
4509 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4510 return FALSE;
4511 break;
4512
4513 /* This relocation describes which C++ vtable entries are actually
4514 used. Record for later use during GC. */
4515 case R_PPC64_GNU_VTENTRY:
4516 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4517 return FALSE;
4518 break;
4519
4520 case R_PPC64_REL14:
4521 case R_PPC64_REL14_BRTAKEN:
4522 case R_PPC64_REL14_BRNTAKEN:
4523 htab->has_14bit_branch = 1;
4524 /* Fall through. */
4525
4526 case R_PPC64_REL24:
4527 if (h != NULL)
4528 {
4529 /* We may need a .plt entry if the function this reloc
4530 refers to is in a shared lib. */
4531 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4532 rel->r_addend))
4533 return FALSE;
4534 if (h == &htab->tls_get_addr->elf
4535 || h == &htab->tls_get_addr_fd->elf)
4536 sec->has_tls_reloc = 1;
4537 else if (htab->tls_get_addr == NULL
4538 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4539 && (h->root.root.string[15] == 0
4540 || h->root.root.string[15] == '@'))
4541 {
4542 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4543 sec->has_tls_reloc = 1;
4544 }
4545 else if (htab->tls_get_addr_fd == NULL
4546 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4547 && (h->root.root.string[14] == 0
4548 || h->root.root.string[14] == '@'))
4549 {
4550 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4551 sec->has_tls_reloc = 1;
4552 }
4553 }
4554 break;
4555
4556 case R_PPC64_TPREL64:
4557 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4558 if (info->shared)
4559 info->flags |= DF_STATIC_TLS;
4560 goto dotlstoc;
4561
4562 case R_PPC64_DTPMOD64:
4563 if (rel + 1 < rel_end
4564 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4565 && rel[1].r_offset == rel->r_offset + 8)
4566 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4567 else
4568 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4569 goto dotlstoc;
4570
4571 case R_PPC64_DTPREL64:
4572 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4573 if (rel != relocs
4574 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4575 && rel[-1].r_offset == rel->r_offset - 8)
4576 /* This is the second reloc of a dtpmod, dtprel pair.
4577 Don't mark with TLS_DTPREL. */
4578 goto dodyn;
4579
4580 dotlstoc:
4581 sec->has_tls_reloc = 1;
4582 if (h != NULL)
4583 {
4584 struct ppc_link_hash_entry *eh;
4585 eh = (struct ppc_link_hash_entry *) h;
4586 eh->tls_mask |= tls_type;
4587 }
4588 else
4589 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4590 rel->r_addend, tls_type))
4591 return FALSE;
4592
4593 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4594 {
4595 /* One extra to simplify get_tls_mask. */
4596 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4597 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4598 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4599 return FALSE;
4600 }
4601 BFD_ASSERT (rel->r_offset % 8 == 0);
4602 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4603
4604 /* Mark the second slot of a GD or LD entry.
4605 -1 to indicate GD and -2 to indicate LD. */
4606 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4607 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4608 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4609 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4610 goto dodyn;
4611
4612 case R_PPC64_TPREL16:
4613 case R_PPC64_TPREL16_LO:
4614 case R_PPC64_TPREL16_HI:
4615 case R_PPC64_TPREL16_HA:
4616 case R_PPC64_TPREL16_DS:
4617 case R_PPC64_TPREL16_LO_DS:
4618 case R_PPC64_TPREL16_HIGHER:
4619 case R_PPC64_TPREL16_HIGHERA:
4620 case R_PPC64_TPREL16_HIGHEST:
4621 case R_PPC64_TPREL16_HIGHESTA:
4622 if (info->shared)
4623 {
4624 info->flags |= DF_STATIC_TLS;
4625 goto dodyn;
4626 }
4627 break;
4628
4629 case R_PPC64_ADDR64:
4630 if (opd_sym_map != NULL
4631 && rel + 1 < rel_end
4632 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4633 {
4634 if (h != NULL)
4635 {
4636 if (h->root.root.string[0] == '.'
4637 && h->root.root.string[1] != 0
4638 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4639 ;
4640 else
4641 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4642 }
4643 else
4644 {
4645 asection *s;
4646
4647 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4648 r_symndx);
4649 if (s == NULL)
4650 return FALSE;
4651 else if (s != sec)
4652 opd_sym_map[rel->r_offset / 8] = s;
4653 }
4654 }
4655 /* Fall through. */
4656
4657 case R_PPC64_REL30:
4658 case R_PPC64_REL32:
4659 case R_PPC64_REL64:
4660 case R_PPC64_ADDR14:
4661 case R_PPC64_ADDR14_BRNTAKEN:
4662 case R_PPC64_ADDR14_BRTAKEN:
4663 case R_PPC64_ADDR16:
4664 case R_PPC64_ADDR16_DS:
4665 case R_PPC64_ADDR16_HA:
4666 case R_PPC64_ADDR16_HI:
4667 case R_PPC64_ADDR16_HIGHER:
4668 case R_PPC64_ADDR16_HIGHERA:
4669 case R_PPC64_ADDR16_HIGHEST:
4670 case R_PPC64_ADDR16_HIGHESTA:
4671 case R_PPC64_ADDR16_LO:
4672 case R_PPC64_ADDR16_LO_DS:
4673 case R_PPC64_ADDR24:
4674 case R_PPC64_ADDR32:
4675 case R_PPC64_UADDR16:
4676 case R_PPC64_UADDR32:
4677 case R_PPC64_UADDR64:
4678 case R_PPC64_TOC:
4679 if (h != NULL && !info->shared)
4680 /* We may need a copy reloc. */
4681 h->non_got_ref = 1;
4682
4683 /* Don't propagate .opd relocs. */
4684 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4685 break;
4686
4687 /* If we are creating a shared library, and this is a reloc
4688 against a global symbol, or a non PC relative reloc
4689 against a local symbol, then we need to copy the reloc
4690 into the shared library. However, if we are linking with
4691 -Bsymbolic, we do not need to copy a reloc against a
4692 global symbol which is defined in an object we are
4693 including in the link (i.e., DEF_REGULAR is set). At
4694 this point we have not seen all the input files, so it is
4695 possible that DEF_REGULAR is not set now but will be set
4696 later (it is never cleared). In case of a weak definition,
4697 DEF_REGULAR may be cleared later by a strong definition in
4698 a shared library. We account for that possibility below by
4699 storing information in the dyn_relocs field of the hash
4700 table entry. A similar situation occurs when creating
4701 shared libraries and symbol visibility changes render the
4702 symbol local.
4703
4704 If on the other hand, we are creating an executable, we
4705 may need to keep relocations for symbols satisfied by a
4706 dynamic library if we manage to avoid copy relocs for the
4707 symbol. */
4708 dodyn:
4709 if ((info->shared
4710 && (MUST_BE_DYN_RELOC (r_type)
4711 || (h != NULL
4712 && (! info->symbolic
4713 || h->root.type == bfd_link_hash_defweak
4714 || !h->def_regular))))
4715 || (ELIMINATE_COPY_RELOCS
4716 && !info->shared
4717 && h != NULL
4718 && (h->root.type == bfd_link_hash_defweak
4719 || !h->def_regular)))
4720 {
4721 struct ppc_dyn_relocs *p;
4722 struct ppc_dyn_relocs **head;
4723
4724 /* We must copy these reloc types into the output file.
4725 Create a reloc section in dynobj and make room for
4726 this reloc. */
4727 if (sreloc == NULL)
4728 {
4729 const char *name;
4730 bfd *dynobj;
4731
4732 name = (bfd_elf_string_from_elf_section
4733 (abfd,
4734 elf_elfheader (abfd)->e_shstrndx,
4735 elf_section_data (sec)->rel_hdr.sh_name));
4736 if (name == NULL)
4737 return FALSE;
4738
4739 if (strncmp (name, ".rela", 5) != 0
4740 || strcmp (bfd_get_section_name (abfd, sec),
4741 name + 5) != 0)
4742 {
4743 (*_bfd_error_handler)
4744 (_("%B: bad relocation section name `%s\'"),
4745 abfd, name);
4746 bfd_set_error (bfd_error_bad_value);
4747 }
4748
4749 dynobj = htab->elf.dynobj;
4750 sreloc = bfd_get_section_by_name (dynobj, name);
4751 if (sreloc == NULL)
4752 {
4753 flagword flags;
4754
4755 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4756 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4757 | SEC_ALLOC | SEC_LOAD);
4758 sreloc = bfd_make_section_with_flags (dynobj,
4759 name,
4760 flags);
4761 if (sreloc == NULL
4762 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4763 return FALSE;
4764 }
4765 elf_section_data (sec)->sreloc = sreloc;
4766 }
4767
4768 /* If this is a global symbol, we count the number of
4769 relocations we need for this symbol. */
4770 if (h != NULL)
4771 {
4772 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4773 }
4774 else
4775 {
4776 /* Track dynamic relocs needed for local syms too.
4777 We really need local syms available to do this
4778 easily. Oh well. */
4779
4780 asection *s;
4781 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4782 sec, r_symndx);
4783 if (s == NULL)
4784 return FALSE;
4785
4786 head = ((struct ppc_dyn_relocs **)
4787 &elf_section_data (s)->local_dynrel);
4788 }
4789
4790 p = *head;
4791 if (p == NULL || p->sec != sec)
4792 {
4793 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4794 if (p == NULL)
4795 return FALSE;
4796 p->next = *head;
4797 *head = p;
4798 p->sec = sec;
4799 p->count = 0;
4800 p->pc_count = 0;
4801 }
4802
4803 p->count += 1;
4804 if (!MUST_BE_DYN_RELOC (r_type))
4805 p->pc_count += 1;
4806 }
4807 break;
4808
4809 default:
4810 break;
4811 }
4812 }
4813
4814 return TRUE;
4815 }
4816
4817 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4818 of the code entry point, and its section. */
4819
4820 static bfd_vma
4821 opd_entry_value (asection *opd_sec,
4822 bfd_vma offset,
4823 asection **code_sec,
4824 bfd_vma *code_off)
4825 {
4826 bfd *opd_bfd = opd_sec->owner;
4827 Elf_Internal_Rela *relocs;
4828 Elf_Internal_Rela *lo, *hi, *look;
4829 bfd_vma val;
4830
4831 /* No relocs implies we are linking a --just-symbols object. */
4832 if (opd_sec->reloc_count == 0)
4833 {
4834 bfd_vma val;
4835
4836 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4837 return (bfd_vma) -1;
4838
4839 if (code_sec != NULL)
4840 {
4841 asection *sec, *likely = NULL;
4842 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4843 if (sec->vma <= val
4844 && (sec->flags & SEC_LOAD) != 0
4845 && (sec->flags & SEC_ALLOC) != 0)
4846 likely = sec;
4847 if (likely != NULL)
4848 {
4849 *code_sec = likely;
4850 if (code_off != NULL)
4851 *code_off = val - likely->vma;
4852 }
4853 }
4854 return val;
4855 }
4856
4857 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4858 if (relocs == NULL)
4859 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4860
4861 /* Go find the opd reloc at the sym address. */
4862 lo = relocs;
4863 BFD_ASSERT (lo != NULL);
4864 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4865 val = (bfd_vma) -1;
4866 while (lo < hi)
4867 {
4868 look = lo + (hi - lo) / 2;
4869 if (look->r_offset < offset)
4870 lo = look + 1;
4871 else if (look->r_offset > offset)
4872 hi = look;
4873 else
4874 {
4875 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4876 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4877 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4878 {
4879 unsigned long symndx = ELF64_R_SYM (look->r_info);
4880 asection *sec;
4881
4882 if (symndx < symtab_hdr->sh_info)
4883 {
4884 Elf_Internal_Sym *sym;
4885
4886 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4887 if (sym == NULL)
4888 {
4889 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4890 symtab_hdr->sh_info,
4891 0, NULL, NULL, NULL);
4892 if (sym == NULL)
4893 break;
4894 symtab_hdr->contents = (bfd_byte *) sym;
4895 }
4896
4897 sym += symndx;
4898 val = sym->st_value;
4899 sec = NULL;
4900 if ((sym->st_shndx != SHN_UNDEF
4901 && sym->st_shndx < SHN_LORESERVE)
4902 || sym->st_shndx > SHN_HIRESERVE)
4903 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4904 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4905 }
4906 else
4907 {
4908 struct elf_link_hash_entry **sym_hashes;
4909 struct elf_link_hash_entry *rh;
4910
4911 sym_hashes = elf_sym_hashes (opd_bfd);
4912 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4913 while (rh->root.type == bfd_link_hash_indirect
4914 || rh->root.type == bfd_link_hash_warning)
4915 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4916 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4917 || rh->root.type == bfd_link_hash_defweak);
4918 val = rh->root.u.def.value;
4919 sec = rh->root.u.def.section;
4920 }
4921 val += look->r_addend;
4922 if (code_off != NULL)
4923 *code_off = val;
4924 if (code_sec != NULL)
4925 *code_sec = sec;
4926 if (sec != NULL && sec->output_section != NULL)
4927 val += sec->output_section->vma + sec->output_offset;
4928 }
4929 break;
4930 }
4931 }
4932
4933 return val;
4934 }
4935
4936 /* Return the section that should be marked against GC for a given
4937 relocation. */
4938
4939 static asection *
4940 ppc64_elf_gc_mark_hook (asection *sec,
4941 struct bfd_link_info *info,
4942 Elf_Internal_Rela *rel,
4943 struct elf_link_hash_entry *h,
4944 Elf_Internal_Sym *sym)
4945 {
4946 asection *rsec;
4947
4948 /* First mark all our entry sym sections. */
4949 if (info->gc_sym_list != NULL)
4950 {
4951 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4952 struct bfd_sym_chain *sym = info->gc_sym_list;
4953
4954 info->gc_sym_list = NULL;
4955 do
4956 {
4957 struct ppc_link_hash_entry *eh;
4958
4959 eh = (struct ppc_link_hash_entry *)
4960 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4961 if (eh == NULL)
4962 continue;
4963 if (eh->elf.root.type != bfd_link_hash_defined
4964 && eh->elf.root.type != bfd_link_hash_defweak)
4965 continue;
4966
4967 if (eh->is_func_descriptor
4968 && (eh->oh->elf.root.type == bfd_link_hash_defined
4969 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4970 rsec = eh->oh->elf.root.u.def.section;
4971 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4972 && opd_entry_value (eh->elf.root.u.def.section,
4973 eh->elf.root.u.def.value,
4974 &rsec, NULL) != (bfd_vma) -1)
4975 ;
4976 else
4977 continue;
4978
4979 if (!rsec->gc_mark)
4980 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4981
4982 rsec = eh->elf.root.u.def.section;
4983 if (!rsec->gc_mark)
4984 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4985
4986 sym = sym->next;
4987 }
4988 while (sym != NULL);
4989 }
4990
4991 /* Syms return NULL if we're marking .opd, so we avoid marking all
4992 function sections, as all functions are referenced in .opd. */
4993 rsec = NULL;
4994 if (get_opd_info (sec) != NULL)
4995 return rsec;
4996
4997 if (h != NULL)
4998 {
4999 enum elf_ppc64_reloc_type r_type;
5000 struct ppc_link_hash_entry *eh;
5001
5002 r_type = ELF64_R_TYPE (rel->r_info);
5003 switch (r_type)
5004 {
5005 case R_PPC64_GNU_VTINHERIT:
5006 case R_PPC64_GNU_VTENTRY:
5007 break;
5008
5009 default:
5010 switch (h->root.type)
5011 {
5012 case bfd_link_hash_defined:
5013 case bfd_link_hash_defweak:
5014 eh = (struct ppc_link_hash_entry *) h;
5015 if (eh->oh != NULL
5016 && eh->oh->is_func_descriptor
5017 && (eh->oh->elf.root.type == bfd_link_hash_defined
5018 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5019 eh = eh->oh;
5020
5021 /* Function descriptor syms cause the associated
5022 function code sym section to be marked. */
5023 if (eh->is_func_descriptor
5024 && (eh->oh->elf.root.type == bfd_link_hash_defined
5025 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5026 {
5027 /* They also mark their opd section. */
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 rsec = eh->oh->elf.root.u.def.section;
5033 }
5034 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5035 && opd_entry_value (eh->elf.root.u.def.section,
5036 eh->elf.root.u.def.value,
5037 &rsec, NULL) != (bfd_vma) -1)
5038 {
5039 if (!eh->elf.root.u.def.section->gc_mark)
5040 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5041 ppc64_elf_gc_mark_hook);
5042 }
5043 else
5044 rsec = h->root.u.def.section;
5045 break;
5046
5047 case bfd_link_hash_common:
5048 rsec = h->root.u.c.p->section;
5049 break;
5050
5051 default:
5052 break;
5053 }
5054 }
5055 }
5056 else
5057 {
5058 asection **opd_sym_section;
5059
5060 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5061 opd_sym_section = get_opd_info (rsec);
5062 if (opd_sym_section != NULL)
5063 {
5064 if (!rsec->gc_mark)
5065 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5066
5067 rsec = opd_sym_section[sym->st_value / 8];
5068 }
5069 }
5070
5071 return rsec;
5072 }
5073
5074 /* Update the .got, .plt. and dynamic reloc reference counts for the
5075 section being removed. */
5076
5077 static bfd_boolean
5078 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5079 asection *sec, const Elf_Internal_Rela *relocs)
5080 {
5081 struct ppc_link_hash_table *htab;
5082 Elf_Internal_Shdr *symtab_hdr;
5083 struct elf_link_hash_entry **sym_hashes;
5084 struct got_entry **local_got_ents;
5085 const Elf_Internal_Rela *rel, *relend;
5086
5087 if ((sec->flags & SEC_ALLOC) == 0)
5088 return TRUE;
5089
5090 elf_section_data (sec)->local_dynrel = NULL;
5091
5092 htab = ppc_hash_table (info);
5093 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5094 sym_hashes = elf_sym_hashes (abfd);
5095 local_got_ents = elf_local_got_ents (abfd);
5096
5097 relend = relocs + sec->reloc_count;
5098 for (rel = relocs; rel < relend; rel++)
5099 {
5100 unsigned long r_symndx;
5101 enum elf_ppc64_reloc_type r_type;
5102 struct elf_link_hash_entry *h = NULL;
5103 char tls_type = 0;
5104
5105 r_symndx = ELF64_R_SYM (rel->r_info);
5106 r_type = ELF64_R_TYPE (rel->r_info);
5107 if (r_symndx >= symtab_hdr->sh_info)
5108 {
5109 struct ppc_link_hash_entry *eh;
5110 struct ppc_dyn_relocs **pp;
5111 struct ppc_dyn_relocs *p;
5112
5113 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5114 while (h->root.type == bfd_link_hash_indirect
5115 || h->root.type == bfd_link_hash_warning)
5116 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5117 eh = (struct ppc_link_hash_entry *) h;
5118
5119 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5120 if (p->sec == sec)
5121 {
5122 /* Everything must go for SEC. */
5123 *pp = p->next;
5124 break;
5125 }
5126 }
5127
5128 switch (r_type)
5129 {
5130 case R_PPC64_GOT_TLSLD16:
5131 case R_PPC64_GOT_TLSLD16_LO:
5132 case R_PPC64_GOT_TLSLD16_HI:
5133 case R_PPC64_GOT_TLSLD16_HA:
5134 ppc64_tlsld_got (abfd)->refcount -= 1;
5135 tls_type = TLS_TLS | TLS_LD;
5136 goto dogot;
5137
5138 case R_PPC64_GOT_TLSGD16:
5139 case R_PPC64_GOT_TLSGD16_LO:
5140 case R_PPC64_GOT_TLSGD16_HI:
5141 case R_PPC64_GOT_TLSGD16_HA:
5142 tls_type = TLS_TLS | TLS_GD;
5143 goto dogot;
5144
5145 case R_PPC64_GOT_TPREL16_DS:
5146 case R_PPC64_GOT_TPREL16_LO_DS:
5147 case R_PPC64_GOT_TPREL16_HI:
5148 case R_PPC64_GOT_TPREL16_HA:
5149 tls_type = TLS_TLS | TLS_TPREL;
5150 goto dogot;
5151
5152 case R_PPC64_GOT_DTPREL16_DS:
5153 case R_PPC64_GOT_DTPREL16_LO_DS:
5154 case R_PPC64_GOT_DTPREL16_HI:
5155 case R_PPC64_GOT_DTPREL16_HA:
5156 tls_type = TLS_TLS | TLS_DTPREL;
5157 goto dogot;
5158
5159 case R_PPC64_GOT16:
5160 case R_PPC64_GOT16_DS:
5161 case R_PPC64_GOT16_HA:
5162 case R_PPC64_GOT16_HI:
5163 case R_PPC64_GOT16_LO:
5164 case R_PPC64_GOT16_LO_DS:
5165 dogot:
5166 {
5167 struct got_entry *ent;
5168
5169 if (h != NULL)
5170 ent = h->got.glist;
5171 else
5172 ent = local_got_ents[r_symndx];
5173
5174 for (; ent != NULL; ent = ent->next)
5175 if (ent->addend == rel->r_addend
5176 && ent->owner == abfd
5177 && ent->tls_type == tls_type)
5178 break;
5179 if (ent == NULL)
5180 abort ();
5181 if (ent->got.refcount > 0)
5182 ent->got.refcount -= 1;
5183 }
5184 break;
5185
5186 case R_PPC64_PLT16_HA:
5187 case R_PPC64_PLT16_HI:
5188 case R_PPC64_PLT16_LO:
5189 case R_PPC64_PLT32:
5190 case R_PPC64_PLT64:
5191 case R_PPC64_REL14:
5192 case R_PPC64_REL14_BRNTAKEN:
5193 case R_PPC64_REL14_BRTAKEN:
5194 case R_PPC64_REL24:
5195 if (h != NULL)
5196 {
5197 struct plt_entry *ent;
5198
5199 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5200 if (ent->addend == rel->r_addend)
5201 break;
5202 if (ent == NULL)
5203 abort ();
5204 if (ent->plt.refcount > 0)
5205 ent->plt.refcount -= 1;
5206 }
5207 break;
5208
5209 default:
5210 break;
5211 }
5212 }
5213 return TRUE;
5214 }
5215
5216 /* The maximum size of .sfpr. */
5217 #define SFPR_MAX (218*4)
5218
5219 struct sfpr_def_parms
5220 {
5221 const char name[12];
5222 unsigned char lo, hi;
5223 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5224 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5225 };
5226
5227 /* Auto-generate _save*, _rest* functions in .sfpr. */
5228
5229 static unsigned int
5230 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5231 {
5232 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5233 unsigned int i;
5234 size_t len = strlen (parm->name);
5235 bfd_boolean writing = FALSE;
5236 char sym[16];
5237
5238 memcpy (sym, parm->name, len);
5239 sym[len + 2] = 0;
5240
5241 for (i = parm->lo; i <= parm->hi; i++)
5242 {
5243 struct elf_link_hash_entry *h;
5244
5245 sym[len + 0] = i / 10 + '0';
5246 sym[len + 1] = i % 10 + '0';
5247 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5248 if (h != NULL
5249 && !h->def_regular)
5250 {
5251 h->root.type = bfd_link_hash_defined;
5252 h->root.u.def.section = htab->sfpr;
5253 h->root.u.def.value = htab->sfpr->size;
5254 h->type = STT_FUNC;
5255 h->def_regular = 1;
5256 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5257 writing = TRUE;
5258 if (htab->sfpr->contents == NULL)
5259 {
5260 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5261 if (htab->sfpr->contents == NULL)
5262 return FALSE;
5263 }
5264 }
5265 if (writing)
5266 {
5267 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5268 if (i != parm->hi)
5269 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5270 else
5271 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5272 htab->sfpr->size = p - htab->sfpr->contents;
5273 }
5274 }
5275
5276 return TRUE;
5277 }
5278
5279 static bfd_byte *
5280 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5281 {
5282 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5283 return p + 4;
5284 }
5285
5286 static bfd_byte *
5287 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5288 {
5289 p = savegpr0 (abfd, p, r);
5290 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5291 p = p + 4;
5292 bfd_put_32 (abfd, BLR, p);
5293 return p + 4;
5294 }
5295
5296 static bfd_byte *
5297 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5298 {
5299 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5300 return p + 4;
5301 }
5302
5303 static bfd_byte *
5304 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5305 {
5306 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5307 p = p + 4;
5308 p = restgpr0 (abfd, p, r);
5309 bfd_put_32 (abfd, MTLR_R0, p);
5310 p = p + 4;
5311 if (r == 29)
5312 {
5313 p = restgpr0 (abfd, p, 30);
5314 p = restgpr0 (abfd, p, 31);
5315 }
5316 bfd_put_32 (abfd, BLR, p);
5317 return p + 4;
5318 }
5319
5320 static bfd_byte *
5321 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5322 {
5323 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5324 return p + 4;
5325 }
5326
5327 static bfd_byte *
5328 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5329 {
5330 p = savegpr1 (abfd, p, r);
5331 bfd_put_32 (abfd, BLR, p);
5332 return p + 4;
5333 }
5334
5335 static bfd_byte *
5336 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5337 {
5338 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5339 return p + 4;
5340 }
5341
5342 static bfd_byte *
5343 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5344 {
5345 p = restgpr1 (abfd, p, r);
5346 bfd_put_32 (abfd, BLR, p);
5347 return p + 4;
5348 }
5349
5350 static bfd_byte *
5351 savefpr (bfd *abfd, bfd_byte *p, int r)
5352 {
5353 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5354 return p + 4;
5355 }
5356
5357 static bfd_byte *
5358 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5359 {
5360 p = savefpr (abfd, p, r);
5361 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5362 p = p + 4;
5363 bfd_put_32 (abfd, BLR, p);
5364 return p + 4;
5365 }
5366
5367 static bfd_byte *
5368 restfpr (bfd *abfd, bfd_byte *p, int r)
5369 {
5370 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5371 return p + 4;
5372 }
5373
5374 static bfd_byte *
5375 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5376 {
5377 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5378 p = p + 4;
5379 p = restfpr (abfd, p, r);
5380 bfd_put_32 (abfd, MTLR_R0, p);
5381 p = p + 4;
5382 if (r == 29)
5383 {
5384 p = restfpr (abfd, p, 30);
5385 p = restfpr (abfd, p, 31);
5386 }
5387 bfd_put_32 (abfd, BLR, p);
5388 return p + 4;
5389 }
5390
5391 static bfd_byte *
5392 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5393 {
5394 p = savefpr (abfd, p, r);
5395 bfd_put_32 (abfd, BLR, p);
5396 return p + 4;
5397 }
5398
5399 static bfd_byte *
5400 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5401 {
5402 p = restfpr (abfd, p, r);
5403 bfd_put_32 (abfd, BLR, p);
5404 return p + 4;
5405 }
5406
5407 static bfd_byte *
5408 savevr (bfd *abfd, bfd_byte *p, int r)
5409 {
5410 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5411 p = p + 4;
5412 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5413 return p + 4;
5414 }
5415
5416 static bfd_byte *
5417 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5418 {
5419 p = savevr (abfd, p, r);
5420 bfd_put_32 (abfd, BLR, p);
5421 return p + 4;
5422 }
5423
5424 static bfd_byte *
5425 restvr (bfd *abfd, bfd_byte *p, int r)
5426 {
5427 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5428 p = p + 4;
5429 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5430 return p + 4;
5431 }
5432
5433 static bfd_byte *
5434 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5435 {
5436 p = restvr (abfd, p, r);
5437 bfd_put_32 (abfd, BLR, p);
5438 return p + 4;
5439 }
5440
5441 /* Called via elf_link_hash_traverse to transfer dynamic linking
5442 information on function code symbol entries to their corresponding
5443 function descriptor symbol entries. */
5444
5445 static bfd_boolean
5446 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5447 {
5448 struct bfd_link_info *info;
5449 struct ppc_link_hash_table *htab;
5450 struct plt_entry *ent;
5451 struct ppc_link_hash_entry *fh;
5452 struct ppc_link_hash_entry *fdh;
5453 bfd_boolean force_local;
5454
5455 fh = (struct ppc_link_hash_entry *) h;
5456 if (fh->elf.root.type == bfd_link_hash_indirect)
5457 return TRUE;
5458
5459 if (fh->elf.root.type == bfd_link_hash_warning)
5460 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5461
5462 info = inf;
5463 htab = ppc_hash_table (info);
5464
5465 /* Resolve undefined references to dot-symbols as the value
5466 in the function descriptor, if we have one in a regular object.
5467 This is to satisfy cases like ".quad .foo". Calls to functions
5468 in dynamic objects are handled elsewhere. */
5469 if (fh->elf.root.type == bfd_link_hash_undefweak
5470 && fh->was_undefined
5471 && (fh->oh->elf.root.type == bfd_link_hash_defined
5472 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5473 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5474 && opd_entry_value (fh->oh->elf.root.u.def.section,
5475 fh->oh->elf.root.u.def.value,
5476 &fh->elf.root.u.def.section,
5477 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5478 {
5479 fh->elf.root.type = fh->oh->elf.root.type;
5480 fh->elf.forced_local = 1;
5481 }
5482
5483 /* If this is a function code symbol, transfer dynamic linking
5484 information to the function descriptor symbol. */
5485 if (!fh->is_func)
5486 return TRUE;
5487
5488 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5489 if (ent->plt.refcount > 0)
5490 break;
5491 if (ent == NULL
5492 || fh->elf.root.root.string[0] != '.'
5493 || fh->elf.root.root.string[1] == '\0')
5494 return TRUE;
5495
5496 /* Find the corresponding function descriptor symbol. Create it
5497 as undefined if necessary. */
5498
5499 fdh = get_fdh (fh, htab);
5500 if (fdh != NULL)
5501 while (fdh->elf.root.type == bfd_link_hash_indirect
5502 || fdh->elf.root.type == bfd_link_hash_warning)
5503 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5504
5505 if (fdh == NULL
5506 && info->shared
5507 && (fh->elf.root.type == bfd_link_hash_undefined
5508 || fh->elf.root.type == bfd_link_hash_undefweak))
5509 {
5510 fdh = make_fdh (info, fh);
5511 if (fdh == NULL)
5512 return FALSE;
5513 }
5514
5515 /* Fake function descriptors are made undefweak. If the function
5516 code symbol is strong undefined, make the fake sym the same.
5517 If the function code symbol is defined, then force the fake
5518 descriptor local; We can't support overriding of symbols in a
5519 shared library on a fake descriptor. */
5520
5521 if (fdh != NULL
5522 && fdh->fake
5523 && fdh->elf.root.type == bfd_link_hash_undefweak)
5524 {
5525 if (fh->elf.root.type == bfd_link_hash_undefined)
5526 {
5527 fdh->elf.root.type = bfd_link_hash_undefined;
5528 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5529 }
5530 else if (fh->elf.root.type == bfd_link_hash_defined
5531 || fh->elf.root.type == bfd_link_hash_defweak)
5532 {
5533 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5534 }
5535 }
5536
5537 if (fdh != NULL
5538 && !fdh->elf.forced_local
5539 && (info->shared
5540 || fdh->elf.def_dynamic
5541 || fdh->elf.ref_dynamic
5542 || (fdh->elf.root.type == bfd_link_hash_undefweak
5543 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5544 {
5545 if (fdh->elf.dynindx == -1)
5546 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5547 return FALSE;
5548 fdh->elf.ref_regular |= fh->elf.ref_regular;
5549 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5550 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5551 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5552 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5553 {
5554 move_plt_plist (fh, fdh);
5555 fdh->elf.needs_plt = 1;
5556 }
5557 fdh->is_func_descriptor = 1;
5558 fdh->oh = fh;
5559 fh->oh = fdh;
5560 }
5561
5562 /* Now that the info is on the function descriptor, clear the
5563 function code sym info. Any function code syms for which we
5564 don't have a definition in a regular file, we force local.
5565 This prevents a shared library from exporting syms that have
5566 been imported from another library. Function code syms that
5567 are really in the library we must leave global to prevent the
5568 linker dragging in a definition from a static library. */
5569 force_local = (!fh->elf.def_regular
5570 || fdh == NULL
5571 || !fdh->elf.def_regular
5572 || fdh->elf.forced_local);
5573 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5574
5575 return TRUE;
5576 }
5577
5578 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5579 this hook to a) provide some gcc support functions, and b) transfer
5580 dynamic linking information gathered so far on function code symbol
5581 entries, to their corresponding function descriptor symbol entries. */
5582
5583 static bfd_boolean
5584 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5585 struct bfd_link_info *info)
5586 {
5587 struct ppc_link_hash_table *htab;
5588 unsigned int i;
5589 const struct sfpr_def_parms funcs[] =
5590 {
5591 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5592 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5593 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5594 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5595 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5596 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5597 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5598 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5599 { "._savef", 14, 31, savefpr, savefpr1_tail },
5600 { "._restf", 14, 31, restfpr, restfpr1_tail },
5601 { "_savevr_", 20, 31, savevr, savevr_tail },
5602 { "_restvr_", 20, 31, restvr, restvr_tail }
5603 };
5604
5605 htab = ppc_hash_table (info);
5606 if (htab->sfpr == NULL)
5607 /* We don't have any relocs. */
5608 return TRUE;
5609
5610 /* Provide any missing _save* and _rest* functions. */
5611 htab->sfpr->size = 0;
5612 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5613 if (!sfpr_define (info, &funcs[i]))
5614 return FALSE;
5615
5616 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5617
5618 if (htab->sfpr->size == 0)
5619 htab->sfpr->flags |= SEC_EXCLUDE;
5620
5621 return TRUE;
5622 }
5623
5624 /* Adjust a symbol defined by a dynamic object and referenced by a
5625 regular object. The current definition is in some section of the
5626 dynamic object, but we're not including those sections. We have to
5627 change the definition to something the rest of the link can
5628 understand. */
5629
5630 static bfd_boolean
5631 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5632 struct elf_link_hash_entry *h)
5633 {
5634 struct ppc_link_hash_table *htab;
5635 asection *s;
5636 unsigned int power_of_two;
5637
5638 htab = ppc_hash_table (info);
5639
5640 /* Deal with function syms. */
5641 if (h->type == STT_FUNC
5642 || h->needs_plt)
5643 {
5644 /* Clear procedure linkage table information for any symbol that
5645 won't need a .plt entry. */
5646 struct plt_entry *ent;
5647 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5648 if (ent->plt.refcount > 0)
5649 break;
5650 if (ent == NULL
5651 || SYMBOL_CALLS_LOCAL (info, h)
5652 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5653 && h->root.type == bfd_link_hash_undefweak))
5654 {
5655 h->plt.plist = NULL;
5656 h->needs_plt = 0;
5657 }
5658 }
5659 else
5660 h->plt.plist = NULL;
5661
5662 /* If this is a weak symbol, and there is a real definition, the
5663 processor independent code will have arranged for us to see the
5664 real definition first, and we can just use the same value. */
5665 if (h->u.weakdef != NULL)
5666 {
5667 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5668 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5669 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5670 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5671 if (ELIMINATE_COPY_RELOCS)
5672 h->non_got_ref = h->u.weakdef->non_got_ref;
5673 return TRUE;
5674 }
5675
5676 /* If we are creating a shared library, we must presume that the
5677 only references to the symbol are via the global offset table.
5678 For such cases we need not do anything here; the relocations will
5679 be handled correctly by relocate_section. */
5680 if (info->shared)
5681 return TRUE;
5682
5683 /* If there are no references to this symbol that do not use the
5684 GOT, we don't need to generate a copy reloc. */
5685 if (!h->non_got_ref)
5686 return TRUE;
5687
5688 if (ELIMINATE_COPY_RELOCS)
5689 {
5690 struct ppc_link_hash_entry * eh;
5691 struct ppc_dyn_relocs *p;
5692
5693 eh = (struct ppc_link_hash_entry *) h;
5694 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5695 {
5696 s = p->sec->output_section;
5697 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5698 break;
5699 }
5700
5701 /* If we didn't find any dynamic relocs in read-only sections, then
5702 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5703 if (p == NULL)
5704 {
5705 h->non_got_ref = 0;
5706 return TRUE;
5707 }
5708 }
5709
5710 if (h->plt.plist != NULL)
5711 {
5712 /* We should never get here, but unfortunately there are versions
5713 of gcc out there that improperly (for this ABI) put initialized
5714 function pointers, vtable refs and suchlike in read-only
5715 sections. Allow them to proceed, but warn that this might
5716 break at runtime. */
5717 (*_bfd_error_handler)
5718 (_("copy reloc against `%s' requires lazy plt linking; "
5719 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5720 h->root.root.string);
5721 }
5722
5723 /* This is a reference to a symbol defined by a dynamic object which
5724 is not a function. */
5725
5726 /* We must allocate the symbol in our .dynbss section, which will
5727 become part of the .bss section of the executable. There will be
5728 an entry for this symbol in the .dynsym section. The dynamic
5729 object will contain position independent code, so all references
5730 from the dynamic object to this symbol will go through the global
5731 offset table. The dynamic linker will use the .dynsym entry to
5732 determine the address it must put in the global offset table, so
5733 both the dynamic object and the regular object will refer to the
5734 same memory location for the variable. */
5735
5736 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5737 to copy the initial value out of the dynamic object and into the
5738 runtime process image. We need to remember the offset into the
5739 .rela.bss section we are going to use. */
5740 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5741 {
5742 htab->relbss->size += sizeof (Elf64_External_Rela);
5743 h->needs_copy = 1;
5744 }
5745
5746 /* We need to figure out the alignment required for this symbol. I
5747 have no idea how ELF linkers handle this. */
5748 power_of_two = bfd_log2 (h->size);
5749 if (power_of_two > 4)
5750 power_of_two = 4;
5751
5752 /* Apply the required alignment. */
5753 s = htab->dynbss;
5754 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5755 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5756 {
5757 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5758 return FALSE;
5759 }
5760
5761 /* Define the symbol as being at this point in the section. */
5762 h->root.u.def.section = s;
5763 h->root.u.def.value = s->size;
5764
5765 /* Increment the section size to make room for the symbol. */
5766 s->size += h->size;
5767
5768 return TRUE;
5769 }
5770
5771 /* If given a function descriptor symbol, hide both the function code
5772 sym and the descriptor. */
5773 static void
5774 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5775 struct elf_link_hash_entry *h,
5776 bfd_boolean force_local)
5777 {
5778 struct ppc_link_hash_entry *eh;
5779 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5780
5781 eh = (struct ppc_link_hash_entry *) h;
5782 if (eh->is_func_descriptor)
5783 {
5784 struct ppc_link_hash_entry *fh = eh->oh;
5785
5786 if (fh == NULL)
5787 {
5788 const char *p, *q;
5789 struct ppc_link_hash_table *htab;
5790 char save;
5791
5792 /* We aren't supposed to use alloca in BFD because on
5793 systems which do not have alloca the version in libiberty
5794 calls xmalloc, which might cause the program to crash
5795 when it runs out of memory. This function doesn't have a
5796 return status, so there's no way to gracefully return an
5797 error. So cheat. We know that string[-1] can be safely
5798 accessed; It's either a string in an ELF string table,
5799 or allocated in an objalloc structure. */
5800
5801 p = eh->elf.root.root.string - 1;
5802 save = *p;
5803 *(char *) p = '.';
5804 htab = ppc_hash_table (info);
5805 fh = (struct ppc_link_hash_entry *)
5806 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5807 *(char *) p = save;
5808
5809 /* Unfortunately, if it so happens that the string we were
5810 looking for was allocated immediately before this string,
5811 then we overwrote the string terminator. That's the only
5812 reason the lookup should fail. */
5813 if (fh == NULL)
5814 {
5815 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5816 while (q >= eh->elf.root.root.string && *q == *p)
5817 --q, --p;
5818 if (q < eh->elf.root.root.string && *p == '.')
5819 fh = (struct ppc_link_hash_entry *)
5820 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5821 }
5822 if (fh != NULL)
5823 {
5824 eh->oh = fh;
5825 fh->oh = eh;
5826 }
5827 }
5828 if (fh != NULL)
5829 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5830 }
5831 }
5832
5833 static bfd_boolean
5834 get_sym_h (struct elf_link_hash_entry **hp,
5835 Elf_Internal_Sym **symp,
5836 asection **symsecp,
5837 char **tls_maskp,
5838 Elf_Internal_Sym **locsymsp,
5839 unsigned long r_symndx,
5840 bfd *ibfd)
5841 {
5842 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5843
5844 if (r_symndx >= symtab_hdr->sh_info)
5845 {
5846 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5847 struct elf_link_hash_entry *h;
5848
5849 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5850 while (h->root.type == bfd_link_hash_indirect
5851 || h->root.type == bfd_link_hash_warning)
5852 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5853
5854 if (hp != NULL)
5855 *hp = h;
5856
5857 if (symp != NULL)
5858 *symp = NULL;
5859
5860 if (symsecp != NULL)
5861 {
5862 asection *symsec = NULL;
5863 if (h->root.type == bfd_link_hash_defined
5864 || h->root.type == bfd_link_hash_defweak)
5865 symsec = h->root.u.def.section;
5866 *symsecp = symsec;
5867 }
5868
5869 if (tls_maskp != NULL)
5870 {
5871 struct ppc_link_hash_entry *eh;
5872
5873 eh = (struct ppc_link_hash_entry *) h;
5874 *tls_maskp = &eh->tls_mask;
5875 }
5876 }
5877 else
5878 {
5879 Elf_Internal_Sym *sym;
5880 Elf_Internal_Sym *locsyms = *locsymsp;
5881
5882 if (locsyms == NULL)
5883 {
5884 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5885 if (locsyms == NULL)
5886 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5887 symtab_hdr->sh_info,
5888 0, NULL, NULL, NULL);
5889 if (locsyms == NULL)
5890 return FALSE;
5891 *locsymsp = locsyms;
5892 }
5893 sym = locsyms + r_symndx;
5894
5895 if (hp != NULL)
5896 *hp = NULL;
5897
5898 if (symp != NULL)
5899 *symp = sym;
5900
5901 if (symsecp != NULL)
5902 {
5903 asection *symsec = NULL;
5904 if ((sym->st_shndx != SHN_UNDEF
5905 && sym->st_shndx < SHN_LORESERVE)
5906 || sym->st_shndx > SHN_HIRESERVE)
5907 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5908 *symsecp = symsec;
5909 }
5910
5911 if (tls_maskp != NULL)
5912 {
5913 struct got_entry **lgot_ents;
5914 char *tls_mask;
5915
5916 tls_mask = NULL;
5917 lgot_ents = elf_local_got_ents (ibfd);
5918 if (lgot_ents != NULL)
5919 {
5920 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5921 tls_mask = &lgot_masks[r_symndx];
5922 }
5923 *tls_maskp = tls_mask;
5924 }
5925 }
5926 return TRUE;
5927 }
5928
5929 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5930 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5931 type suitable for optimization, and 1 otherwise. */
5932
5933 static int
5934 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5935 Elf_Internal_Sym **locsymsp,
5936 const Elf_Internal_Rela *rel, bfd *ibfd)
5937 {
5938 unsigned long r_symndx;
5939 int next_r;
5940 struct elf_link_hash_entry *h;
5941 Elf_Internal_Sym *sym;
5942 asection *sec;
5943 bfd_vma off;
5944
5945 r_symndx = ELF64_R_SYM (rel->r_info);
5946 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5947 return 0;
5948
5949 if ((*tls_maskp != NULL && **tls_maskp != 0)
5950 || sec == NULL
5951 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5952 return 1;
5953
5954 /* Look inside a TOC section too. */
5955 if (h != NULL)
5956 {
5957 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5958 off = h->root.u.def.value;
5959 }
5960 else
5961 off = sym->st_value;
5962 off += rel->r_addend;
5963 BFD_ASSERT (off % 8 == 0);
5964 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5965 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5966 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5967 return 0;
5968 if (toc_symndx != NULL)
5969 *toc_symndx = r_symndx;
5970 if ((h == NULL
5971 || ((h->root.type == bfd_link_hash_defined
5972 || h->root.type == bfd_link_hash_defweak)
5973 && !h->def_dynamic))
5974 && (next_r == -1 || next_r == -2))
5975 return 1 - next_r;
5976 return 1;
5977 }
5978
5979 /* Adjust all global syms defined in opd sections. In gcc generated
5980 code for the old ABI, these will already have been done. */
5981
5982 static bfd_boolean
5983 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5984 {
5985 struct ppc_link_hash_entry *eh;
5986 asection *sym_sec;
5987 long *opd_adjust;
5988
5989 if (h->root.type == bfd_link_hash_indirect)
5990 return TRUE;
5991
5992 if (h->root.type == bfd_link_hash_warning)
5993 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5994
5995 if (h->root.type != bfd_link_hash_defined
5996 && h->root.type != bfd_link_hash_defweak)
5997 return TRUE;
5998
5999 eh = (struct ppc_link_hash_entry *) h;
6000 if (eh->adjust_done)
6001 return TRUE;
6002
6003 sym_sec = eh->elf.root.u.def.section;
6004 opd_adjust = get_opd_info (sym_sec);
6005 if (opd_adjust != NULL)
6006 {
6007 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6008 if (adjust == -1)
6009 {
6010 /* This entry has been deleted. */
6011 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6012 if (dsec == NULL)
6013 {
6014 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6015 if (elf_discarded_section (dsec))
6016 {
6017 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6018 break;
6019 }
6020 }
6021 eh->elf.root.u.def.value = 0;
6022 eh->elf.root.u.def.section = dsec;
6023 }
6024 else
6025 eh->elf.root.u.def.value += adjust;
6026 eh->adjust_done = 1;
6027 }
6028 return TRUE;
6029 }
6030
6031 /* Handles decrementing dynamic reloc counts for the reloc specified by
6032 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6033 have already been determined. */
6034
6035 static bfd_boolean
6036 dec_dynrel_count (bfd_vma r_info,
6037 asection *sec,
6038 struct bfd_link_info *info,
6039 Elf_Internal_Sym **local_syms,
6040 struct elf_link_hash_entry *h,
6041 asection *sym_sec)
6042 {
6043 enum elf_ppc64_reloc_type r_type;
6044 struct ppc_dyn_relocs *p;
6045 struct ppc_dyn_relocs **pp;
6046
6047 /* Can this reloc be dynamic? This switch, and later tests here
6048 should be kept in sync with the code in check_relocs. */
6049 r_type = ELF64_R_TYPE (r_info);
6050 switch (r_type)
6051 {
6052 default:
6053 return TRUE;
6054
6055 case R_PPC64_TPREL16:
6056 case R_PPC64_TPREL16_LO:
6057 case R_PPC64_TPREL16_HI:
6058 case R_PPC64_TPREL16_HA:
6059 case R_PPC64_TPREL16_DS:
6060 case R_PPC64_TPREL16_LO_DS:
6061 case R_PPC64_TPREL16_HIGHER:
6062 case R_PPC64_TPREL16_HIGHERA:
6063 case R_PPC64_TPREL16_HIGHEST:
6064 case R_PPC64_TPREL16_HIGHESTA:
6065 if (!info->shared)
6066 return TRUE;
6067
6068 case R_PPC64_TPREL64:
6069 case R_PPC64_DTPMOD64:
6070 case R_PPC64_DTPREL64:
6071 case R_PPC64_ADDR64:
6072 case R_PPC64_REL30:
6073 case R_PPC64_REL32:
6074 case R_PPC64_REL64:
6075 case R_PPC64_ADDR14:
6076 case R_PPC64_ADDR14_BRNTAKEN:
6077 case R_PPC64_ADDR14_BRTAKEN:
6078 case R_PPC64_ADDR16:
6079 case R_PPC64_ADDR16_DS:
6080 case R_PPC64_ADDR16_HA:
6081 case R_PPC64_ADDR16_HI:
6082 case R_PPC64_ADDR16_HIGHER:
6083 case R_PPC64_ADDR16_HIGHERA:
6084 case R_PPC64_ADDR16_HIGHEST:
6085 case R_PPC64_ADDR16_HIGHESTA:
6086 case R_PPC64_ADDR16_LO:
6087 case R_PPC64_ADDR16_LO_DS:
6088 case R_PPC64_ADDR24:
6089 case R_PPC64_ADDR32:
6090 case R_PPC64_UADDR16:
6091 case R_PPC64_UADDR32:
6092 case R_PPC64_UADDR64:
6093 case R_PPC64_TOC:
6094 break;
6095 }
6096
6097 if (local_syms != NULL)
6098 {
6099 unsigned long r_symndx;
6100 Elf_Internal_Sym *sym;
6101 bfd *ibfd = sec->owner;
6102
6103 r_symndx = ELF64_R_SYM (r_info);
6104 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6105 return FALSE;
6106 }
6107
6108 if ((info->shared
6109 && (MUST_BE_DYN_RELOC (r_type)
6110 || (h != NULL
6111 && (!info->symbolic
6112 || h->root.type == bfd_link_hash_defweak
6113 || !h->def_regular))))
6114 || (ELIMINATE_COPY_RELOCS
6115 && !info->shared
6116 && h != NULL
6117 && (h->root.type == bfd_link_hash_defweak
6118 || !h->def_regular)))
6119 ;
6120 else
6121 return TRUE;
6122
6123 if (h != NULL)
6124 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6125 else if (sym_sec != NULL)
6126 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6127 else
6128 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6129
6130 while ((p = *pp) != NULL)
6131 {
6132 if (p->sec == sec)
6133 {
6134 if (!MUST_BE_DYN_RELOC (r_type))
6135 p->pc_count -= 1;
6136 p->count -= 1;
6137 if (p->count == 0)
6138 *pp = p->next;
6139 return TRUE;
6140 }
6141 pp = &p->next;
6142 }
6143
6144 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6145 sec->owner, sec);
6146 bfd_set_error (bfd_error_bad_value);
6147 return FALSE;
6148 }
6149
6150 /* Remove unused Official Procedure Descriptor entries. Currently we
6151 only remove those associated with functions in discarded link-once
6152 sections, or weakly defined functions that have been overridden. It
6153 would be possible to remove many more entries for statically linked
6154 applications. */
6155
6156 bfd_boolean
6157 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6158 bfd_boolean non_overlapping)
6159 {
6160 bfd *ibfd;
6161 bfd_boolean some_edited = FALSE;
6162 asection *need_pad = NULL;
6163
6164 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6165 {
6166 asection *sec;
6167 Elf_Internal_Rela *relstart, *rel, *relend;
6168 Elf_Internal_Shdr *symtab_hdr;
6169 Elf_Internal_Sym *local_syms;
6170 struct elf_link_hash_entry **sym_hashes;
6171 bfd_vma offset;
6172 bfd_size_type amt;
6173 long *opd_adjust;
6174 bfd_boolean need_edit, add_aux_fields;
6175 bfd_size_type cnt_16b = 0;
6176
6177 sec = bfd_get_section_by_name (ibfd, ".opd");
6178 if (sec == NULL)
6179 continue;
6180
6181 amt = sec->size * sizeof (long) / 8;
6182 opd_adjust = get_opd_info (sec);
6183 if (opd_adjust == NULL)
6184 {
6185 /* check_relocs hasn't been called. Must be a ld -r link
6186 or --just-symbols object. */
6187 opd_adjust = bfd_zalloc (obfd, amt);
6188 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6189 }
6190 memset (opd_adjust, 0, amt);
6191
6192 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6193 continue;
6194
6195 if (sec->output_section == bfd_abs_section_ptr)
6196 continue;
6197
6198 /* Look through the section relocs. */
6199 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6200 continue;
6201
6202 local_syms = NULL;
6203 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6204 sym_hashes = elf_sym_hashes (ibfd);
6205
6206 /* Read the relocations. */
6207 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6208 info->keep_memory);
6209 if (relstart == NULL)
6210 return FALSE;
6211
6212 /* First run through the relocs to check they are sane, and to
6213 determine whether we need to edit this opd section. */
6214 need_edit = FALSE;
6215 need_pad = sec;
6216 offset = 0;
6217 relend = relstart + sec->reloc_count;
6218 for (rel = relstart; rel < relend; )
6219 {
6220 enum elf_ppc64_reloc_type r_type;
6221 unsigned long r_symndx;
6222 asection *sym_sec;
6223 struct elf_link_hash_entry *h;
6224 Elf_Internal_Sym *sym;
6225
6226 /* .opd contains a regular array of 16 or 24 byte entries. We're
6227 only interested in the reloc pointing to a function entry
6228 point. */
6229 if (rel->r_offset != offset
6230 || rel + 1 >= relend
6231 || (rel + 1)->r_offset != offset + 8)
6232 {
6233 /* If someone messes with .opd alignment then after a
6234 "ld -r" we might have padding in the middle of .opd.
6235 Also, there's nothing to prevent someone putting
6236 something silly in .opd with the assembler. No .opd
6237 optimization for them! */
6238 broken_opd:
6239 (*_bfd_error_handler)
6240 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6241 need_edit = FALSE;
6242 break;
6243 }
6244
6245 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6246 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6247 {
6248 (*_bfd_error_handler)
6249 (_("%B: unexpected reloc type %u in .opd section"),
6250 ibfd, r_type);
6251 need_edit = FALSE;
6252 break;
6253 }
6254
6255 r_symndx = ELF64_R_SYM (rel->r_info);
6256 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6257 r_symndx, ibfd))
6258 goto error_ret;
6259
6260 if (sym_sec == NULL || sym_sec->owner == NULL)
6261 {
6262 const char *sym_name;
6263 if (h != NULL)
6264 sym_name = h->root.root.string;
6265 else
6266 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6267 sym_sec);
6268
6269 (*_bfd_error_handler)
6270 (_("%B: undefined sym `%s' in .opd section"),
6271 ibfd, sym_name);
6272 need_edit = FALSE;
6273 break;
6274 }
6275
6276 /* opd entries are always for functions defined in the
6277 current input bfd. If the symbol isn't defined in the
6278 input bfd, then we won't be using the function in this
6279 bfd; It must be defined in a linkonce section in another
6280 bfd, or is weak. It's also possible that we are
6281 discarding the function due to a linker script /DISCARD/,
6282 which we test for via the output_section. */
6283 if (sym_sec->owner != ibfd
6284 || sym_sec->output_section == bfd_abs_section_ptr)
6285 need_edit = TRUE;
6286
6287 rel += 2;
6288 if (rel == relend
6289 || (rel + 1 == relend && rel->r_offset == offset + 16))
6290 {
6291 if (sec->size == offset + 24)
6292 {
6293 need_pad = NULL;
6294 break;
6295 }
6296 if (rel == relend && sec->size == offset + 16)
6297 {
6298 cnt_16b++;
6299 break;
6300 }
6301 goto broken_opd;
6302 }
6303
6304 if (rel->r_offset == offset + 24)
6305 offset += 24;
6306 else if (rel->r_offset != offset + 16)
6307 goto broken_opd;
6308 else if (rel + 1 < relend
6309 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6310 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6311 {
6312 offset += 16;
6313 cnt_16b++;
6314 }
6315 else if (rel + 2 < relend
6316 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6317 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6318 {
6319 offset += 24;
6320 rel += 1;
6321 }
6322 else
6323 goto broken_opd;
6324 }
6325
6326 add_aux_fields = non_overlapping && cnt_16b > 0;
6327
6328 if (need_edit || add_aux_fields)
6329 {
6330 Elf_Internal_Rela *write_rel;
6331 bfd_byte *rptr, *wptr;
6332 bfd_byte *new_contents = NULL;
6333 bfd_boolean skip;
6334 long opd_ent_size;
6335
6336 /* This seems a waste of time as input .opd sections are all
6337 zeros as generated by gcc, but I suppose there's no reason
6338 this will always be so. We might start putting something in
6339 the third word of .opd entries. */
6340 if ((sec->flags & SEC_IN_MEMORY) == 0)
6341 {
6342 bfd_byte *loc;
6343 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6344 {
6345 if (loc != NULL)
6346 free (loc);
6347 error_ret:
6348 if (local_syms != NULL
6349 && symtab_hdr->contents != (unsigned char *) local_syms)
6350 free (local_syms);
6351 if (elf_section_data (sec)->relocs != relstart)
6352 free (relstart);
6353 return FALSE;
6354 }
6355 sec->contents = loc;
6356 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6357 }
6358
6359 elf_section_data (sec)->relocs = relstart;
6360
6361 wptr = sec->contents;
6362 rptr = sec->contents;
6363 new_contents = sec->contents;
6364
6365 if (add_aux_fields)
6366 {
6367 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6368 if (new_contents == NULL)
6369 return FALSE;
6370 need_pad = FALSE;
6371 wptr = new_contents;
6372 }
6373
6374 write_rel = relstart;
6375 skip = FALSE;
6376 offset = 0;
6377 opd_ent_size = 0;
6378 for (rel = relstart; rel < relend; rel++)
6379 {
6380 unsigned long r_symndx;
6381 asection *sym_sec;
6382 struct elf_link_hash_entry *h;
6383 Elf_Internal_Sym *sym;
6384
6385 r_symndx = ELF64_R_SYM (rel->r_info);
6386 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6387 r_symndx, ibfd))
6388 goto error_ret;
6389
6390 if (rel->r_offset == offset)
6391 {
6392 struct ppc_link_hash_entry *fdh = NULL;
6393
6394 /* See if the .opd entry is full 24 byte or
6395 16 byte (with fd_aux entry overlapped with next
6396 fd_func). */
6397 opd_ent_size = 24;
6398 if ((rel + 2 == relend && sec->size == offset + 16)
6399 || (rel + 3 < relend
6400 && rel[2].r_offset == offset + 16
6401 && rel[3].r_offset == offset + 24
6402 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6403 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6404 opd_ent_size = 16;
6405
6406 if (h != NULL
6407 && h->root.root.string[0] == '.')
6408 {
6409 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6410 ppc_hash_table (info));
6411 if (fdh != NULL
6412 && fdh->elf.root.type != bfd_link_hash_defined
6413 && fdh->elf.root.type != bfd_link_hash_defweak)
6414 fdh = NULL;
6415 }
6416
6417 skip = (sym_sec->owner != ibfd
6418 || sym_sec->output_section == bfd_abs_section_ptr);
6419 if (skip)
6420 {
6421 if (fdh != NULL && sym_sec->owner == ibfd)
6422 {
6423 /* Arrange for the function descriptor sym
6424 to be dropped. */
6425 fdh->elf.root.u.def.value = 0;
6426 fdh->elf.root.u.def.section = sym_sec;
6427 }
6428 opd_adjust[rel->r_offset / 8] = -1;
6429 }
6430 else
6431 {
6432 /* We'll be keeping this opd entry. */
6433
6434 if (fdh != NULL)
6435 {
6436 /* Redefine the function descriptor symbol to
6437 this location in the opd section. It is
6438 necessary to update the value here rather
6439 than using an array of adjustments as we do
6440 for local symbols, because various places
6441 in the generic ELF code use the value
6442 stored in u.def.value. */
6443 fdh->elf.root.u.def.value = wptr - new_contents;
6444 fdh->adjust_done = 1;
6445 }
6446
6447 /* Local syms are a bit tricky. We could
6448 tweak them as they can be cached, but
6449 we'd need to look through the local syms
6450 for the function descriptor sym which we
6451 don't have at the moment. So keep an
6452 array of adjustments. */
6453 opd_adjust[rel->r_offset / 8]
6454 = (wptr - new_contents) - (rptr - sec->contents);
6455
6456 if (wptr != rptr)
6457 memcpy (wptr, rptr, opd_ent_size);
6458 wptr += opd_ent_size;
6459 if (add_aux_fields && opd_ent_size == 16)
6460 {
6461 memset (wptr, '\0', 8);
6462 wptr += 8;
6463 }
6464 }
6465 rptr += opd_ent_size;
6466 offset += opd_ent_size;
6467 }
6468
6469 if (skip)
6470 {
6471 if (!dec_dynrel_count (rel->r_info, sec, info,
6472 NULL, h, sym_sec))
6473 goto error_ret;
6474 }
6475 else
6476 {
6477 /* We need to adjust any reloc offsets to point to the
6478 new opd entries. While we're at it, we may as well
6479 remove redundant relocs. */
6480 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6481 if (write_rel != rel)
6482 memcpy (write_rel, rel, sizeof (*rel));
6483 ++write_rel;
6484 }
6485 }
6486
6487 sec->size = wptr - new_contents;
6488 sec->reloc_count = write_rel - relstart;
6489 if (add_aux_fields)
6490 {
6491 free (sec->contents);
6492 sec->contents = new_contents;
6493 }
6494
6495 /* Fudge the size too, as this is used later in
6496 elf_bfd_final_link if we are emitting relocs. */
6497 elf_section_data (sec)->rel_hdr.sh_size
6498 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6499 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6500 some_edited = TRUE;
6501 }
6502 else if (elf_section_data (sec)->relocs != relstart)
6503 free (relstart);
6504
6505 if (local_syms != NULL
6506 && symtab_hdr->contents != (unsigned char *) local_syms)
6507 {
6508 if (!info->keep_memory)
6509 free (local_syms);
6510 else
6511 symtab_hdr->contents = (unsigned char *) local_syms;
6512 }
6513 }
6514
6515 if (some_edited)
6516 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6517
6518 /* If we are doing a final link and the last .opd entry is just 16 byte
6519 long, add a 8 byte padding after it. */
6520 if (need_pad != NULL && !info->relocatable)
6521 {
6522 bfd_byte *p;
6523
6524 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6525 {
6526 BFD_ASSERT (need_pad->size > 0);
6527
6528 p = bfd_malloc (need_pad->size + 8);
6529 if (p == NULL)
6530 return FALSE;
6531
6532 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6533 p, 0, need_pad->size))
6534 return FALSE;
6535
6536 need_pad->contents = p;
6537 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6538 }
6539 else
6540 {
6541 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6542 if (p == NULL)
6543 return FALSE;
6544
6545 need_pad->contents = p;
6546 }
6547
6548 memset (need_pad->contents + need_pad->size, 0, 8);
6549 need_pad->size += 8;
6550 }
6551
6552 return TRUE;
6553 }
6554
6555 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6556
6557 asection *
6558 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6559 {
6560 struct ppc_link_hash_table *htab;
6561
6562 htab = ppc_hash_table (info);
6563 if (htab->tls_get_addr != NULL)
6564 {
6565 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6566
6567 while (h->elf.root.type == bfd_link_hash_indirect
6568 || h->elf.root.type == bfd_link_hash_warning)
6569 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6570
6571 htab->tls_get_addr = h;
6572
6573 if (htab->tls_get_addr_fd == NULL
6574 && h->oh != NULL
6575 && h->oh->is_func_descriptor
6576 && (h->oh->elf.root.type == bfd_link_hash_defined
6577 || h->oh->elf.root.type == bfd_link_hash_defweak))
6578 htab->tls_get_addr_fd = h->oh;
6579 }
6580
6581 if (htab->tls_get_addr_fd != NULL)
6582 {
6583 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6584
6585 while (h->elf.root.type == bfd_link_hash_indirect
6586 || h->elf.root.type == bfd_link_hash_warning)
6587 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6588
6589 htab->tls_get_addr_fd = h;
6590 }
6591
6592 return _bfd_elf_tls_setup (obfd, info);
6593 }
6594
6595 /* Run through all the TLS relocs looking for optimization
6596 opportunities. The linker has been hacked (see ppc64elf.em) to do
6597 a preliminary section layout so that we know the TLS segment
6598 offsets. We can't optimize earlier because some optimizations need
6599 to know the tp offset, and we need to optimize before allocating
6600 dynamic relocations. */
6601
6602 bfd_boolean
6603 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6604 {
6605 bfd *ibfd;
6606 asection *sec;
6607 struct ppc_link_hash_table *htab;
6608
6609 if (info->relocatable || info->shared)
6610 return TRUE;
6611
6612 htab = ppc_hash_table (info);
6613 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6614 {
6615 Elf_Internal_Sym *locsyms = NULL;
6616
6617 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6618 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6619 {
6620 Elf_Internal_Rela *relstart, *rel, *relend;
6621 int expecting_tls_get_addr;
6622
6623 /* Read the relocations. */
6624 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6625 info->keep_memory);
6626 if (relstart == NULL)
6627 return FALSE;
6628
6629 expecting_tls_get_addr = 0;
6630 relend = relstart + sec->reloc_count;
6631 for (rel = relstart; rel < relend; rel++)
6632 {
6633 enum elf_ppc64_reloc_type r_type;
6634 unsigned long r_symndx;
6635 struct elf_link_hash_entry *h;
6636 Elf_Internal_Sym *sym;
6637 asection *sym_sec;
6638 char *tls_mask;
6639 char tls_set, tls_clear, tls_type = 0;
6640 bfd_vma value;
6641 bfd_boolean ok_tprel, is_local;
6642
6643 r_symndx = ELF64_R_SYM (rel->r_info);
6644 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6645 r_symndx, ibfd))
6646 {
6647 err_free_rel:
6648 if (elf_section_data (sec)->relocs != relstart)
6649 free (relstart);
6650 if (locsyms != NULL
6651 && (elf_tdata (ibfd)->symtab_hdr.contents
6652 != (unsigned char *) locsyms))
6653 free (locsyms);
6654 return FALSE;
6655 }
6656
6657 if (h != NULL)
6658 {
6659 if (h->root.type != bfd_link_hash_defined
6660 && h->root.type != bfd_link_hash_defweak)
6661 continue;
6662 value = h->root.u.def.value;
6663 }
6664 else
6665 /* Symbols referenced by TLS relocs must be of type
6666 STT_TLS. So no need for .opd local sym adjust. */
6667 value = sym->st_value;
6668
6669 ok_tprel = FALSE;
6670 is_local = FALSE;
6671 if (h == NULL
6672 || !h->def_dynamic)
6673 {
6674 is_local = TRUE;
6675 value += sym_sec->output_offset;
6676 value += sym_sec->output_section->vma;
6677 value -= htab->elf.tls_sec->vma;
6678 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6679 < (bfd_vma) 1 << 32);
6680 }
6681
6682 r_type = ELF64_R_TYPE (rel->r_info);
6683 switch (r_type)
6684 {
6685 case R_PPC64_GOT_TLSLD16:
6686 case R_PPC64_GOT_TLSLD16_LO:
6687 case R_PPC64_GOT_TLSLD16_HI:
6688 case R_PPC64_GOT_TLSLD16_HA:
6689 /* These relocs should never be against a symbol
6690 defined in a shared lib. Leave them alone if
6691 that turns out to be the case. */
6692 ppc64_tlsld_got (ibfd)->refcount -= 1;
6693 if (!is_local)
6694 continue;
6695
6696 /* LD -> LE */
6697 tls_set = 0;
6698 tls_clear = TLS_LD;
6699 tls_type = TLS_TLS | TLS_LD;
6700 expecting_tls_get_addr = 1;
6701 break;
6702
6703 case R_PPC64_GOT_TLSGD16:
6704 case R_PPC64_GOT_TLSGD16_LO:
6705 case R_PPC64_GOT_TLSGD16_HI:
6706 case R_PPC64_GOT_TLSGD16_HA:
6707 if (ok_tprel)
6708 /* GD -> LE */
6709 tls_set = 0;
6710 else
6711 /* GD -> IE */
6712 tls_set = TLS_TLS | TLS_TPRELGD;
6713 tls_clear = TLS_GD;
6714 tls_type = TLS_TLS | TLS_GD;
6715 expecting_tls_get_addr = 1;
6716 break;
6717
6718 case R_PPC64_GOT_TPREL16_DS:
6719 case R_PPC64_GOT_TPREL16_LO_DS:
6720 case R_PPC64_GOT_TPREL16_HI:
6721 case R_PPC64_GOT_TPREL16_HA:
6722 expecting_tls_get_addr = 0;
6723 if (ok_tprel)
6724 {
6725 /* IE -> LE */
6726 tls_set = 0;
6727 tls_clear = TLS_TPREL;
6728 tls_type = TLS_TLS | TLS_TPREL;
6729 break;
6730 }
6731 else
6732 continue;
6733
6734 case R_PPC64_REL14:
6735 case R_PPC64_REL14_BRTAKEN:
6736 case R_PPC64_REL14_BRNTAKEN:
6737 case R_PPC64_REL24:
6738 if (h != NULL
6739 && (h == &htab->tls_get_addr->elf
6740 || h == &htab->tls_get_addr_fd->elf))
6741 {
6742 if (!expecting_tls_get_addr
6743 && rel != relstart
6744 && ((ELF64_R_TYPE (rel[-1].r_info)
6745 == R_PPC64_TOC16)
6746 || (ELF64_R_TYPE (rel[-1].r_info)
6747 == R_PPC64_TOC16_LO)))
6748 {
6749 /* Check for toc tls entries. */
6750 char *toc_tls;
6751 int retval;
6752
6753 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6754 rel - 1, ibfd);
6755 if (retval == 0)
6756 goto err_free_rel;
6757 if (toc_tls != NULL)
6758 expecting_tls_get_addr = retval > 1;
6759 }
6760
6761 if (expecting_tls_get_addr)
6762 {
6763 struct plt_entry *ent;
6764 for (ent = h->plt.plist; ent; ent = ent->next)
6765 if (ent->addend == 0)
6766 {
6767 if (ent->plt.refcount > 0)
6768 ent->plt.refcount -= 1;
6769 break;
6770 }
6771 }
6772 }
6773 expecting_tls_get_addr = 0;
6774 continue;
6775
6776 case R_PPC64_TPREL64:
6777 expecting_tls_get_addr = 0;
6778 if (ok_tprel)
6779 {
6780 /* IE -> LE */
6781 tls_set = TLS_EXPLICIT;
6782 tls_clear = TLS_TPREL;
6783 break;
6784 }
6785 else
6786 continue;
6787
6788 case R_PPC64_DTPMOD64:
6789 expecting_tls_get_addr = 0;
6790 if (rel + 1 < relend
6791 && (rel[1].r_info
6792 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6793 && rel[1].r_offset == rel->r_offset + 8)
6794 {
6795 if (ok_tprel)
6796 /* GD -> LE */
6797 tls_set = TLS_EXPLICIT | TLS_GD;
6798 else
6799 /* GD -> IE */
6800 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6801 tls_clear = TLS_GD;
6802 }
6803 else
6804 {
6805 if (!is_local)
6806 continue;
6807
6808 /* LD -> LE */
6809 tls_set = TLS_EXPLICIT;
6810 tls_clear = TLS_LD;
6811 }
6812 break;
6813
6814 default:
6815 expecting_tls_get_addr = 0;
6816 continue;
6817 }
6818
6819 if ((tls_set & TLS_EXPLICIT) == 0)
6820 {
6821 struct got_entry *ent;
6822
6823 /* Adjust got entry for this reloc. */
6824 if (h != NULL)
6825 ent = h->got.glist;
6826 else
6827 ent = elf_local_got_ents (ibfd)[r_symndx];
6828
6829 for (; ent != NULL; ent = ent->next)
6830 if (ent->addend == rel->r_addend
6831 && ent->owner == ibfd
6832 && ent->tls_type == tls_type)
6833 break;
6834 if (ent == NULL)
6835 abort ();
6836
6837 if (tls_set == 0)
6838 {
6839 /* We managed to get rid of a got entry. */
6840 if (ent->got.refcount > 0)
6841 ent->got.refcount -= 1;
6842 }
6843 }
6844 else
6845 {
6846 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6847 we'll lose one or two dyn relocs. */
6848 if (!dec_dynrel_count (rel->r_info, sec, info,
6849 NULL, h, sym_sec))
6850 return FALSE;
6851
6852 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6853 {
6854 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6855 NULL, h, sym_sec))
6856 return FALSE;
6857 }
6858 }
6859
6860 *tls_mask |= tls_set;
6861 *tls_mask &= ~tls_clear;
6862 }
6863
6864 if (elf_section_data (sec)->relocs != relstart)
6865 free (relstart);
6866 }
6867
6868 if (locsyms != NULL
6869 && (elf_tdata (ibfd)->symtab_hdr.contents
6870 != (unsigned char *) locsyms))
6871 {
6872 if (!info->keep_memory)
6873 free (locsyms);
6874 else
6875 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6876 }
6877 }
6878 return TRUE;
6879 }
6880
6881 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6882 the values of any global symbols in a toc section that has been
6883 edited. Globals in toc sections should be a rarity, so this function
6884 sets a flag if any are found in toc sections other than the one just
6885 edited, so that futher hash table traversals can be avoided. */
6886
6887 struct adjust_toc_info
6888 {
6889 asection *toc;
6890 unsigned long *skip;
6891 bfd_boolean global_toc_syms;
6892 };
6893
6894 static bfd_boolean
6895 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6896 {
6897 struct ppc_link_hash_entry *eh;
6898 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6899
6900 if (h->root.type == bfd_link_hash_indirect)
6901 return TRUE;
6902
6903 if (h->root.type == bfd_link_hash_warning)
6904 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6905
6906 if (h->root.type != bfd_link_hash_defined
6907 && h->root.type != bfd_link_hash_defweak)
6908 return TRUE;
6909
6910 eh = (struct ppc_link_hash_entry *) h;
6911 if (eh->adjust_done)
6912 return TRUE;
6913
6914 if (eh->elf.root.u.def.section == toc_inf->toc)
6915 {
6916 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6917 if (skip != (unsigned long) -1)
6918 eh->elf.root.u.def.value -= skip;
6919 else
6920 {
6921 (*_bfd_error_handler)
6922 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6923 eh->elf.root.u.def.section = &bfd_abs_section;
6924 eh->elf.root.u.def.value = 0;
6925 }
6926 eh->adjust_done = 1;
6927 }
6928 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6929 toc_inf->global_toc_syms = TRUE;
6930
6931 return TRUE;
6932 }
6933
6934 /* Examine all relocs referencing .toc sections in order to remove
6935 unused .toc entries. */
6936
6937 bfd_boolean
6938 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6939 {
6940 bfd *ibfd;
6941 struct adjust_toc_info toc_inf;
6942
6943 toc_inf.global_toc_syms = TRUE;
6944 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6945 {
6946 asection *toc, *sec;
6947 Elf_Internal_Shdr *symtab_hdr;
6948 Elf_Internal_Sym *local_syms;
6949 struct elf_link_hash_entry **sym_hashes;
6950 Elf_Internal_Rela *relstart, *rel;
6951 unsigned long *skip, *drop;
6952 unsigned char *used;
6953 unsigned char *keep, last, some_unused;
6954
6955 toc = bfd_get_section_by_name (ibfd, ".toc");
6956 if (toc == NULL
6957 || toc->size == 0
6958 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6959 || elf_discarded_section (toc))
6960 continue;
6961
6962 local_syms = NULL;
6963 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6964 sym_hashes = elf_sym_hashes (ibfd);
6965
6966 /* Look at sections dropped from the final link. */
6967 skip = NULL;
6968 relstart = NULL;
6969 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6970 {
6971 if (sec->reloc_count == 0
6972 || !elf_discarded_section (sec)
6973 || get_opd_info (sec)
6974 || (sec->flags & SEC_ALLOC) == 0
6975 || (sec->flags & SEC_DEBUGGING) != 0)
6976 continue;
6977
6978 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6979 if (relstart == NULL)
6980 goto error_ret;
6981
6982 /* Run through the relocs to see which toc entries might be
6983 unused. */
6984 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6985 {
6986 enum elf_ppc64_reloc_type r_type;
6987 unsigned long r_symndx;
6988 asection *sym_sec;
6989 struct elf_link_hash_entry *h;
6990 Elf_Internal_Sym *sym;
6991 bfd_vma val;
6992
6993 r_type = ELF64_R_TYPE (rel->r_info);
6994 switch (r_type)
6995 {
6996 default:
6997 continue;
6998
6999 case R_PPC64_TOC16:
7000 case R_PPC64_TOC16_LO:
7001 case R_PPC64_TOC16_HI:
7002 case R_PPC64_TOC16_HA:
7003 case R_PPC64_TOC16_DS:
7004 case R_PPC64_TOC16_LO_DS:
7005 break;
7006 }
7007
7008 r_symndx = ELF64_R_SYM (rel->r_info);
7009 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7010 r_symndx, ibfd))
7011 goto error_ret;
7012
7013 if (sym_sec != toc)
7014 continue;
7015
7016 if (h != NULL)
7017 val = h->root.u.def.value;
7018 else
7019 val = sym->st_value;
7020 val += rel->r_addend;
7021
7022 if (val >= toc->size)
7023 continue;
7024
7025 /* Anything in the toc ought to be aligned to 8 bytes.
7026 If not, don't mark as unused. */
7027 if (val & 7)
7028 continue;
7029
7030 if (skip == NULL)
7031 {
7032 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7033 if (skip == NULL)
7034 goto error_ret;
7035 }
7036
7037 skip[val >> 3] = 1;
7038 }
7039
7040 if (elf_section_data (sec)->relocs != relstart)
7041 free (relstart);
7042 }
7043
7044 if (skip == NULL)
7045 continue;
7046
7047 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7048 if (used == NULL)
7049 {
7050 error_ret:
7051 if (local_syms != NULL
7052 && symtab_hdr->contents != (unsigned char *) local_syms)
7053 free (local_syms);
7054 if (sec != NULL
7055 && relstart != NULL
7056 && elf_section_data (sec)->relocs != relstart)
7057 free (relstart);
7058 if (skip != NULL)
7059 free (skip);
7060 return FALSE;
7061 }
7062
7063 /* Now check all kept sections that might reference the toc. */
7064 for (sec = ibfd->sections;
7065 sec != NULL;
7066 /* Check the toc itself last. */
7067 sec = (sec == toc ? NULL
7068 : sec->next == toc && sec->next->next ? sec->next->next
7069 : sec->next == NULL ? toc
7070 : sec->next))
7071 {
7072 int repeat;
7073
7074 if (sec->reloc_count == 0
7075 || elf_discarded_section (sec)
7076 || get_opd_info (sec)
7077 || (sec->flags & SEC_ALLOC) == 0
7078 || (sec->flags & SEC_DEBUGGING) != 0)
7079 continue;
7080
7081 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7082 if (relstart == NULL)
7083 goto error_ret;
7084
7085 /* Mark toc entries referenced as used. */
7086 repeat = 0;
7087 do
7088 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7089 {
7090 enum elf_ppc64_reloc_type r_type;
7091 unsigned long r_symndx;
7092 asection *sym_sec;
7093 struct elf_link_hash_entry *h;
7094 Elf_Internal_Sym *sym;
7095 bfd_vma val;
7096
7097 r_type = ELF64_R_TYPE (rel->r_info);
7098 switch (r_type)
7099 {
7100 case R_PPC64_TOC16:
7101 case R_PPC64_TOC16_LO:
7102 case R_PPC64_TOC16_HI:
7103 case R_PPC64_TOC16_HA:
7104 case R_PPC64_TOC16_DS:
7105 case R_PPC64_TOC16_LO_DS:
7106 /* In case we're taking addresses of toc entries. */
7107 case R_PPC64_ADDR64:
7108 break;
7109
7110 default:
7111 continue;
7112 }
7113
7114 r_symndx = ELF64_R_SYM (rel->r_info);
7115 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7116 r_symndx, ibfd))
7117 {
7118 free (used);
7119 goto error_ret;
7120 }
7121
7122 if (sym_sec != toc)
7123 continue;
7124
7125 if (h != NULL)
7126 val = h->root.u.def.value;
7127 else
7128 val = sym->st_value;
7129 val += rel->r_addend;
7130
7131 if (val >= toc->size)
7132 continue;
7133
7134 /* For the toc section, we only mark as used if
7135 this entry itself isn't unused. */
7136 if (sec == toc
7137 && !used[val >> 3]
7138 && (used[rel->r_offset >> 3]
7139 || !skip[rel->r_offset >> 3]))
7140 /* Do all the relocs again, to catch reference
7141 chains. */
7142 repeat = 1;
7143
7144 used[val >> 3] = 1;
7145 }
7146 while (repeat);
7147 }
7148
7149 /* Merge the used and skip arrays. Assume that TOC
7150 doublewords not appearing as either used or unused belong
7151 to to an entry more than one doubleword in size. */
7152 for (drop = skip, keep = used, last = 0, some_unused = 0;
7153 drop < skip + (toc->size + 7) / 8;
7154 ++drop, ++keep)
7155 {
7156 if (*keep)
7157 {
7158 *drop = 0;
7159 last = 0;
7160 }
7161 else if (*drop)
7162 {
7163 some_unused = 1;
7164 last = 1;
7165 }
7166 else
7167 *drop = last;
7168 }
7169
7170 free (used);
7171
7172 if (some_unused)
7173 {
7174 bfd_byte *contents, *src;
7175 unsigned long off;
7176
7177 /* Shuffle the toc contents, and at the same time convert the
7178 skip array from booleans into offsets. */
7179 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7180 goto error_ret;
7181
7182 elf_section_data (toc)->this_hdr.contents = contents;
7183
7184 for (src = contents, off = 0, drop = skip;
7185 src < contents + toc->size;
7186 src += 8, ++drop)
7187 {
7188 if (*drop)
7189 {
7190 *drop = (unsigned long) -1;
7191 off += 8;
7192 }
7193 else if (off != 0)
7194 {
7195 *drop = off;
7196 memcpy (src - off, src, 8);
7197 }
7198 }
7199 toc->rawsize = toc->size;
7200 toc->size = src - contents - off;
7201
7202 if (toc->reloc_count != 0)
7203 {
7204 Elf_Internal_Rela *wrel;
7205 bfd_size_type sz;
7206
7207 /* Read toc relocs. */
7208 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7209 TRUE);
7210 if (relstart == NULL)
7211 goto error_ret;
7212
7213 /* Remove unused toc relocs, and adjust those we keep. */
7214 wrel = relstart;
7215 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7216 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7217 {
7218 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7219 wrel->r_info = rel->r_info;
7220 wrel->r_addend = rel->r_addend;
7221 ++wrel;
7222 }
7223 else if (!dec_dynrel_count (rel->r_info, toc, info,
7224 &local_syms, NULL, NULL))
7225 goto error_ret;
7226
7227 toc->reloc_count = wrel - relstart;
7228 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7229 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7230 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7231 }
7232
7233 /* Adjust addends for relocs against the toc section sym. */
7234 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7235 {
7236 if (sec->reloc_count == 0
7237 || elf_discarded_section (sec))
7238 continue;
7239
7240 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7241 TRUE);
7242 if (relstart == NULL)
7243 goto error_ret;
7244
7245 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7246 {
7247 enum elf_ppc64_reloc_type r_type;
7248 unsigned long r_symndx;
7249 asection *sym_sec;
7250 struct elf_link_hash_entry *h;
7251 Elf_Internal_Sym *sym;
7252
7253 r_type = ELF64_R_TYPE (rel->r_info);
7254 switch (r_type)
7255 {
7256 default:
7257 continue;
7258
7259 case R_PPC64_TOC16:
7260 case R_PPC64_TOC16_LO:
7261 case R_PPC64_TOC16_HI:
7262 case R_PPC64_TOC16_HA:
7263 case R_PPC64_TOC16_DS:
7264 case R_PPC64_TOC16_LO_DS:
7265 case R_PPC64_ADDR64:
7266 break;
7267 }
7268
7269 r_symndx = ELF64_R_SYM (rel->r_info);
7270 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7271 r_symndx, ibfd))
7272 goto error_ret;
7273
7274 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7275 continue;
7276
7277 rel->r_addend -= skip[rel->r_addend >> 3];
7278 }
7279 }
7280
7281 /* We shouldn't have local or global symbols defined in the TOC,
7282 but handle them anyway. */
7283 if (local_syms != NULL)
7284 {
7285 Elf_Internal_Sym *sym;
7286
7287 for (sym = local_syms;
7288 sym < local_syms + symtab_hdr->sh_info;
7289 ++sym)
7290 if (sym->st_shndx != SHN_UNDEF
7291 && (sym->st_shndx < SHN_LORESERVE
7292 || sym->st_shndx > SHN_HIRESERVE)
7293 && sym->st_value != 0
7294 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7295 {
7296 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7297 sym->st_value -= skip[sym->st_value >> 3];
7298 else
7299 {
7300 (*_bfd_error_handler)
7301 (_("%s defined in removed toc entry"),
7302 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7303 NULL));
7304 sym->st_value = 0;
7305 sym->st_shndx = SHN_ABS;
7306 }
7307 symtab_hdr->contents = (unsigned char *) local_syms;
7308 }
7309 }
7310
7311 /* Finally, adjust any global syms defined in the toc. */
7312 if (toc_inf.global_toc_syms)
7313 {
7314 toc_inf.toc = toc;
7315 toc_inf.skip = skip;
7316 toc_inf.global_toc_syms = FALSE;
7317 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7318 &toc_inf);
7319 }
7320 }
7321
7322 if (local_syms != NULL
7323 && symtab_hdr->contents != (unsigned char *) local_syms)
7324 {
7325 if (!info->keep_memory)
7326 free (local_syms);
7327 else
7328 symtab_hdr->contents = (unsigned char *) local_syms;
7329 }
7330 free (skip);
7331 }
7332
7333 return TRUE;
7334 }
7335
7336 /* Allocate space in .plt, .got and associated reloc sections for
7337 dynamic relocs. */
7338
7339 static bfd_boolean
7340 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7341 {
7342 struct bfd_link_info *info;
7343 struct ppc_link_hash_table *htab;
7344 asection *s;
7345 struct ppc_link_hash_entry *eh;
7346 struct ppc_dyn_relocs *p;
7347 struct got_entry *gent;
7348
7349 if (h->root.type == bfd_link_hash_indirect)
7350 return TRUE;
7351
7352 if (h->root.type == bfd_link_hash_warning)
7353 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7354
7355 info = (struct bfd_link_info *) inf;
7356 htab = ppc_hash_table (info);
7357
7358 if (htab->elf.dynamic_sections_created
7359 && h->dynindx != -1
7360 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7361 {
7362 struct plt_entry *pent;
7363 bfd_boolean doneone = FALSE;
7364 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7365 if (pent->plt.refcount > 0)
7366 {
7367 /* If this is the first .plt entry, make room for the special
7368 first entry. */
7369 s = htab->plt;
7370 if (s->size == 0)
7371 s->size += PLT_INITIAL_ENTRY_SIZE;
7372
7373 pent->plt.offset = s->size;
7374
7375 /* Make room for this entry. */
7376 s->size += PLT_ENTRY_SIZE;
7377
7378 /* Make room for the .glink code. */
7379 s = htab->glink;
7380 if (s->size == 0)
7381 s->size += GLINK_CALL_STUB_SIZE;
7382 /* We need bigger stubs past index 32767. */
7383 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7384 s->size += 4;
7385 s->size += 2*4;
7386
7387 /* We also need to make an entry in the .rela.plt section. */
7388 s = htab->relplt;
7389 s->size += sizeof (Elf64_External_Rela);
7390 doneone = TRUE;
7391 }
7392 else
7393 pent->plt.offset = (bfd_vma) -1;
7394 if (!doneone)
7395 {
7396 h->plt.plist = NULL;
7397 h->needs_plt = 0;
7398 }
7399 }
7400 else
7401 {
7402 h->plt.plist = NULL;
7403 h->needs_plt = 0;
7404 }
7405
7406 eh = (struct ppc_link_hash_entry *) h;
7407 /* Run through the TLS GD got entries first if we're changing them
7408 to TPREL. */
7409 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7410 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7411 if (gent->got.refcount > 0
7412 && (gent->tls_type & TLS_GD) != 0)
7413 {
7414 /* This was a GD entry that has been converted to TPREL. If
7415 there happens to be a TPREL entry we can use that one. */
7416 struct got_entry *ent;
7417 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7418 if (ent->got.refcount > 0
7419 && (ent->tls_type & TLS_TPREL) != 0
7420 && ent->addend == gent->addend
7421 && ent->owner == gent->owner)
7422 {
7423 gent->got.refcount = 0;
7424 break;
7425 }
7426
7427 /* If not, then we'll be using our own TPREL entry. */
7428 if (gent->got.refcount != 0)
7429 gent->tls_type = TLS_TLS | TLS_TPREL;
7430 }
7431
7432 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7433 if (gent->got.refcount > 0)
7434 {
7435 bfd_boolean dyn;
7436
7437 /* Make sure this symbol is output as a dynamic symbol.
7438 Undefined weak syms won't yet be marked as dynamic,
7439 nor will all TLS symbols. */
7440 if (h->dynindx == -1
7441 && !h->forced_local)
7442 {
7443 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7444 return FALSE;
7445 }
7446
7447 if ((gent->tls_type & TLS_LD) != 0
7448 && !h->def_dynamic)
7449 {
7450 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7451 continue;
7452 }
7453
7454 s = ppc64_elf_tdata (gent->owner)->got;
7455 gent->got.offset = s->size;
7456 s->size
7457 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7458 dyn = htab->elf.dynamic_sections_created;
7459 if ((info->shared
7460 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7461 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7462 || h->root.type != bfd_link_hash_undefweak))
7463 ppc64_elf_tdata (gent->owner)->relgot->size
7464 += (gent->tls_type & eh->tls_mask & TLS_GD
7465 ? 2 * sizeof (Elf64_External_Rela)
7466 : sizeof (Elf64_External_Rela));
7467 }
7468 else
7469 gent->got.offset = (bfd_vma) -1;
7470
7471 if (eh->dyn_relocs == NULL)
7472 return TRUE;
7473
7474 /* In the shared -Bsymbolic case, discard space allocated for
7475 dynamic pc-relative relocs against symbols which turn out to be
7476 defined in regular objects. For the normal shared case, discard
7477 space for relocs that have become local due to symbol visibility
7478 changes. */
7479
7480 if (info->shared)
7481 {
7482 /* Relocs that use pc_count are those that appear on a call insn,
7483 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7484 generated via assembly. We want calls to protected symbols to
7485 resolve directly to the function rather than going via the plt.
7486 If people want function pointer comparisons to work as expected
7487 then they should avoid writing weird assembly. */
7488 if (SYMBOL_CALLS_LOCAL (info, h))
7489 {
7490 struct ppc_dyn_relocs **pp;
7491
7492 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7493 {
7494 p->count -= p->pc_count;
7495 p->pc_count = 0;
7496 if (p->count == 0)
7497 *pp = p->next;
7498 else
7499 pp = &p->next;
7500 }
7501 }
7502
7503 /* Also discard relocs on undefined weak syms with non-default
7504 visibility. */
7505 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7506 && h->root.type == bfd_link_hash_undefweak)
7507 eh->dyn_relocs = NULL;
7508 }
7509 else if (ELIMINATE_COPY_RELOCS)
7510 {
7511 /* For the non-shared case, discard space for relocs against
7512 symbols which turn out to need copy relocs or are not
7513 dynamic. */
7514
7515 if (!h->non_got_ref
7516 && h->def_dynamic
7517 && !h->def_regular)
7518 {
7519 /* Make sure this symbol is output as a dynamic symbol.
7520 Undefined weak syms won't yet be marked as dynamic. */
7521 if (h->dynindx == -1
7522 && !h->forced_local)
7523 {
7524 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7525 return FALSE;
7526 }
7527
7528 /* If that succeeded, we know we'll be keeping all the
7529 relocs. */
7530 if (h->dynindx != -1)
7531 goto keep;
7532 }
7533
7534 eh->dyn_relocs = NULL;
7535
7536 keep: ;
7537 }
7538
7539 /* Finally, allocate space. */
7540 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7541 {
7542 asection *sreloc = elf_section_data (p->sec)->sreloc;
7543 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7544 }
7545
7546 return TRUE;
7547 }
7548
7549 /* Find any dynamic relocs that apply to read-only sections. */
7550
7551 static bfd_boolean
7552 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7553 {
7554 struct ppc_link_hash_entry *eh;
7555 struct ppc_dyn_relocs *p;
7556
7557 if (h->root.type == bfd_link_hash_warning)
7558 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7559
7560 eh = (struct ppc_link_hash_entry *) h;
7561 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7562 {
7563 asection *s = p->sec->output_section;
7564
7565 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7566 {
7567 struct bfd_link_info *info = inf;
7568
7569 info->flags |= DF_TEXTREL;
7570
7571 /* Not an error, just cut short the traversal. */
7572 return FALSE;
7573 }
7574 }
7575 return TRUE;
7576 }
7577
7578 /* Set the sizes of the dynamic sections. */
7579
7580 static bfd_boolean
7581 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7582 struct bfd_link_info *info)
7583 {
7584 struct ppc_link_hash_table *htab;
7585 bfd *dynobj;
7586 asection *s;
7587 bfd_boolean relocs;
7588 bfd *ibfd;
7589
7590 htab = ppc_hash_table (info);
7591 dynobj = htab->elf.dynobj;
7592 if (dynobj == NULL)
7593 abort ();
7594
7595 if (htab->elf.dynamic_sections_created)
7596 {
7597 /* Set the contents of the .interp section to the interpreter. */
7598 if (info->executable)
7599 {
7600 s = bfd_get_section_by_name (dynobj, ".interp");
7601 if (s == NULL)
7602 abort ();
7603 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7604 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7605 }
7606 }
7607
7608 /* Set up .got offsets for local syms, and space for local dynamic
7609 relocs. */
7610 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7611 {
7612 struct got_entry **lgot_ents;
7613 struct got_entry **end_lgot_ents;
7614 char *lgot_masks;
7615 bfd_size_type locsymcount;
7616 Elf_Internal_Shdr *symtab_hdr;
7617 asection *srel;
7618
7619 if (!is_ppc64_elf_target (ibfd->xvec))
7620 continue;
7621
7622 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7623 {
7624 s = ppc64_elf_tdata (ibfd)->got;
7625 ppc64_tlsld_got (ibfd)->offset = s->size;
7626 s->size += 16;
7627 if (info->shared)
7628 {
7629 srel = ppc64_elf_tdata (ibfd)->relgot;
7630 srel->size += sizeof (Elf64_External_Rela);
7631 }
7632 }
7633 else
7634 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7635
7636 for (s = ibfd->sections; s != NULL; s = s->next)
7637 {
7638 struct ppc_dyn_relocs *p;
7639
7640 for (p = *((struct ppc_dyn_relocs **)
7641 &elf_section_data (s)->local_dynrel);
7642 p != NULL;
7643 p = p->next)
7644 {
7645 if (!bfd_is_abs_section (p->sec)
7646 && bfd_is_abs_section (p->sec->output_section))
7647 {
7648 /* Input section has been discarded, either because
7649 it is a copy of a linkonce section or due to
7650 linker script /DISCARD/, so we'll be discarding
7651 the relocs too. */
7652 }
7653 else if (p->count != 0)
7654 {
7655 srel = elf_section_data (p->sec)->sreloc;
7656 srel->size += p->count * sizeof (Elf64_External_Rela);
7657 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7658 info->flags |= DF_TEXTREL;
7659 }
7660 }
7661 }
7662
7663 lgot_ents = elf_local_got_ents (ibfd);
7664 if (!lgot_ents)
7665 continue;
7666
7667 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7668 locsymcount = symtab_hdr->sh_info;
7669 end_lgot_ents = lgot_ents + locsymcount;
7670 lgot_masks = (char *) end_lgot_ents;
7671 s = ppc64_elf_tdata (ibfd)->got;
7672 srel = ppc64_elf_tdata (ibfd)->relgot;
7673 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7674 {
7675 struct got_entry *ent;
7676
7677 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7678 if (ent->got.refcount > 0)
7679 {
7680 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7681 {
7682 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7683 {
7684 ppc64_tlsld_got (ibfd)->offset = s->size;
7685 s->size += 16;
7686 if (info->shared)
7687 srel->size += sizeof (Elf64_External_Rela);
7688 }
7689 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7690 }
7691 else
7692 {
7693 ent->got.offset = s->size;
7694 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7695 {
7696 s->size += 16;
7697 if (info->shared)
7698 srel->size += 2 * sizeof (Elf64_External_Rela);
7699 }
7700 else
7701 {
7702 s->size += 8;
7703 if (info->shared)
7704 srel->size += sizeof (Elf64_External_Rela);
7705 }
7706 }
7707 }
7708 else
7709 ent->got.offset = (bfd_vma) -1;
7710 }
7711 }
7712
7713 /* Allocate global sym .plt and .got entries, and space for global
7714 sym dynamic relocs. */
7715 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7716
7717 /* We now have determined the sizes of the various dynamic sections.
7718 Allocate memory for them. */
7719 relocs = FALSE;
7720 for (s = dynobj->sections; s != NULL; s = s->next)
7721 {
7722 if ((s->flags & SEC_LINKER_CREATED) == 0)
7723 continue;
7724
7725 if (s == htab->brlt || s == htab->relbrlt)
7726 /* These haven't been allocated yet; don't strip. */
7727 continue;
7728 else if (s == htab->got
7729 || s == htab->plt
7730 || s == htab->glink)
7731 {
7732 /* Strip this section if we don't need it; see the
7733 comment below. */
7734 }
7735 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7736 {
7737 if (s->size == 0)
7738 {
7739 /* If we don't need this section, strip it from the
7740 output file. This is mostly to handle .rela.bss and
7741 .rela.plt. We must create both sections in
7742 create_dynamic_sections, because they must be created
7743 before the linker maps input sections to output
7744 sections. The linker does that before
7745 adjust_dynamic_symbol is called, and it is that
7746 function which decides whether anything needs to go
7747 into these sections. */
7748 }
7749 else
7750 {
7751 if (s != htab->relplt)
7752 relocs = TRUE;
7753
7754 /* We use the reloc_count field as a counter if we need
7755 to copy relocs into the output file. */
7756 s->reloc_count = 0;
7757 }
7758 }
7759 else
7760 {
7761 /* It's not one of our sections, so don't allocate space. */
7762 continue;
7763 }
7764
7765 if (s->size == 0)
7766 {
7767 s->flags |= SEC_EXCLUDE;
7768 continue;
7769 }
7770
7771 /* .plt is in the bss section. We don't initialise it. */
7772 if (s == htab->plt)
7773 continue;
7774
7775 /* Allocate memory for the section contents. We use bfd_zalloc
7776 here in case unused entries are not reclaimed before the
7777 section's contents are written out. This should not happen,
7778 but this way if it does we get a R_PPC64_NONE reloc in .rela
7779 sections instead of garbage.
7780 We also rely on the section contents being zero when writing
7781 the GOT. */
7782 s->contents = bfd_zalloc (dynobj, s->size);
7783 if (s->contents == NULL)
7784 return FALSE;
7785 }
7786
7787 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7788 {
7789 if (!is_ppc64_elf_target (ibfd->xvec))
7790 continue;
7791
7792 s = ppc64_elf_tdata (ibfd)->got;
7793 if (s != NULL && s != htab->got)
7794 {
7795 if (s->size == 0)
7796 s->flags |= SEC_EXCLUDE;
7797 else
7798 {
7799 s->contents = bfd_zalloc (ibfd, s->size);
7800 if (s->contents == NULL)
7801 return FALSE;
7802 }
7803 }
7804 s = ppc64_elf_tdata (ibfd)->relgot;
7805 if (s != NULL)
7806 {
7807 if (s->size == 0)
7808 s->flags |= SEC_EXCLUDE;
7809 else
7810 {
7811 s->contents = bfd_zalloc (ibfd, s->size);
7812 if (s->contents == NULL)
7813 return FALSE;
7814 relocs = TRUE;
7815 s->reloc_count = 0;
7816 }
7817 }
7818 }
7819
7820 if (htab->elf.dynamic_sections_created)
7821 {
7822 /* Add some entries to the .dynamic section. We fill in the
7823 values later, in ppc64_elf_finish_dynamic_sections, but we
7824 must add the entries now so that we get the correct size for
7825 the .dynamic section. The DT_DEBUG entry is filled in by the
7826 dynamic linker and used by the debugger. */
7827 #define add_dynamic_entry(TAG, VAL) \
7828 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7829
7830 if (info->executable)
7831 {
7832 if (!add_dynamic_entry (DT_DEBUG, 0))
7833 return FALSE;
7834 }
7835
7836 if (htab->plt != NULL && htab->plt->size != 0)
7837 {
7838 if (!add_dynamic_entry (DT_PLTGOT, 0)
7839 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7840 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7841 || !add_dynamic_entry (DT_JMPREL, 0)
7842 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7843 return FALSE;
7844 }
7845
7846 if (NO_OPD_RELOCS)
7847 {
7848 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7849 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7850 return FALSE;
7851 }
7852
7853 if (relocs)
7854 {
7855 if (!add_dynamic_entry (DT_RELA, 0)
7856 || !add_dynamic_entry (DT_RELASZ, 0)
7857 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7858 return FALSE;
7859
7860 /* If any dynamic relocs apply to a read-only section,
7861 then we need a DT_TEXTREL entry. */
7862 if ((info->flags & DF_TEXTREL) == 0)
7863 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7864
7865 if ((info->flags & DF_TEXTREL) != 0)
7866 {
7867 if (!add_dynamic_entry (DT_TEXTREL, 0))
7868 return FALSE;
7869 }
7870 }
7871 }
7872 #undef add_dynamic_entry
7873
7874 return TRUE;
7875 }
7876
7877 /* Determine the type of stub needed, if any, for a call. */
7878
7879 static inline enum ppc_stub_type
7880 ppc_type_of_stub (asection *input_sec,
7881 const Elf_Internal_Rela *rel,
7882 struct ppc_link_hash_entry **hash,
7883 bfd_vma destination)
7884 {
7885 struct ppc_link_hash_entry *h = *hash;
7886 bfd_vma location;
7887 bfd_vma branch_offset;
7888 bfd_vma max_branch_offset;
7889 enum elf_ppc64_reloc_type r_type;
7890
7891 if (h != NULL)
7892 {
7893 if (h->oh != NULL
7894 && h->oh->is_func_descriptor)
7895 h = h->oh;
7896
7897 if (h->elf.dynindx != -1)
7898 {
7899 struct plt_entry *ent;
7900
7901 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7902 if (ent->addend == rel->r_addend
7903 && ent->plt.offset != (bfd_vma) -1)
7904 {
7905 *hash = h;
7906 return ppc_stub_plt_call;
7907 }
7908 }
7909
7910 if (!(h->elf.root.type == bfd_link_hash_defined
7911 || h->elf.root.type == bfd_link_hash_defweak)
7912 || h->elf.root.u.def.section->output_section == NULL)
7913 return ppc_stub_none;
7914 }
7915
7916 /* Determine where the call point is. */
7917 location = (input_sec->output_offset
7918 + input_sec->output_section->vma
7919 + rel->r_offset);
7920
7921 branch_offset = destination - location;
7922 r_type = ELF64_R_TYPE (rel->r_info);
7923
7924 /* Determine if a long branch stub is needed. */
7925 max_branch_offset = 1 << 25;
7926 if (r_type != R_PPC64_REL24)
7927 max_branch_offset = 1 << 15;
7928
7929 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7930 /* We need a stub. Figure out whether a long_branch or plt_branch
7931 is needed later. */
7932 return ppc_stub_long_branch;
7933
7934 return ppc_stub_none;
7935 }
7936
7937 /* Build a .plt call stub. */
7938
7939 static inline bfd_byte *
7940 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7941 {
7942 #define PPC_LO(v) ((v) & 0xffff)
7943 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7944 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7945
7946 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7947 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7948 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7949 if (PPC_HA (offset + 8) != PPC_HA (offset))
7950 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7951 offset += 8;
7952 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7953 if (PPC_HA (offset + 8) != PPC_HA (offset))
7954 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7955 offset += 8;
7956 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7957 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7958 bfd_put_32 (obfd, BCTR, p), p += 4;
7959 return p;
7960 }
7961
7962 static bfd_boolean
7963 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7964 {
7965 struct ppc_stub_hash_entry *stub_entry;
7966 struct ppc_branch_hash_entry *br_entry;
7967 struct bfd_link_info *info;
7968 struct ppc_link_hash_table *htab;
7969 bfd_byte *loc;
7970 bfd_byte *p;
7971 unsigned int indx;
7972 struct plt_entry *ent;
7973 bfd_vma dest, off;
7974 int size;
7975
7976 /* Massage our args to the form they really have. */
7977 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7978 info = in_arg;
7979
7980 htab = ppc_hash_table (info);
7981
7982 /* Make a note of the offset within the stubs for this entry. */
7983 stub_entry->stub_offset = stub_entry->stub_sec->size;
7984 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7985
7986 htab->stub_count[stub_entry->stub_type - 1] += 1;
7987 switch (stub_entry->stub_type)
7988 {
7989 case ppc_stub_long_branch:
7990 case ppc_stub_long_branch_r2off:
7991 /* Branches are relative. This is where we are going to. */
7992 off = dest = (stub_entry->target_value
7993 + stub_entry->target_section->output_offset
7994 + stub_entry->target_section->output_section->vma);
7995
7996 /* And this is where we are coming from. */
7997 off -= (stub_entry->stub_offset
7998 + stub_entry->stub_sec->output_offset
7999 + stub_entry->stub_sec->output_section->vma);
8000
8001 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8002 size = 4;
8003 else
8004 {
8005 bfd_vma r2off;
8006
8007 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8008 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8009 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8010 loc += 4;
8011 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8012 loc += 4;
8013 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8014 loc += 4;
8015 off -= 12;
8016 size = 16;
8017 }
8018 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8019
8020 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
8021
8022 if (info->emitrelocations)
8023 {
8024 Elf_Internal_Rela *relocs, *r;
8025 struct bfd_elf_section_data *elfsec_data;
8026
8027 elfsec_data = elf_section_data (stub_entry->stub_sec);
8028 relocs = elfsec_data->relocs;
8029 if (relocs == NULL)
8030 {
8031 bfd_size_type relsize;
8032 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8033 relocs = bfd_alloc (htab->stub_bfd, relsize);
8034 if (relocs == NULL)
8035 return FALSE;
8036 elfsec_data->relocs = relocs;
8037 elfsec_data->rel_hdr.sh_size = relsize;
8038 elfsec_data->rel_hdr.sh_entsize = 24;
8039 stub_entry->stub_sec->reloc_count = 0;
8040 }
8041 r = relocs + stub_entry->stub_sec->reloc_count;
8042 stub_entry->stub_sec->reloc_count += 1;
8043 r->r_offset = loc - stub_entry->stub_sec->contents;
8044 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8045 r->r_addend = dest;
8046 if (stub_entry->h != NULL)
8047 {
8048 struct elf_link_hash_entry **hashes;
8049 unsigned long symndx;
8050 struct ppc_link_hash_entry *h;
8051
8052 hashes = elf_sym_hashes (htab->stub_bfd);
8053 if (hashes == NULL)
8054 {
8055 bfd_size_type hsize;
8056
8057 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8058 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8059 if (hashes == NULL)
8060 return FALSE;
8061 elf_sym_hashes (htab->stub_bfd) = hashes;
8062 htab->stub_globals = 1;
8063 }
8064 symndx = htab->stub_globals++;
8065 h = stub_entry->h;
8066 hashes[symndx] = &h->elf;
8067 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8068 if (h->oh != NULL && h->oh->is_func)
8069 h = h->oh;
8070 if (h->elf.root.u.def.section != stub_entry->target_section)
8071 /* H is an opd symbol. The addend must be zero. */
8072 r->r_addend = 0;
8073 else
8074 {
8075 off = (h->elf.root.u.def.value
8076 + h->elf.root.u.def.section->output_offset
8077 + h->elf.root.u.def.section->output_section->vma);
8078 r->r_addend -= off;
8079 }
8080 }
8081 }
8082 break;
8083
8084 case ppc_stub_plt_branch:
8085 case ppc_stub_plt_branch_r2off:
8086 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8087 stub_entry->root.string + 9,
8088 FALSE, FALSE);
8089 if (br_entry == NULL)
8090 {
8091 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8092 stub_entry->root.string + 9);
8093 htab->stub_error = TRUE;
8094 return FALSE;
8095 }
8096
8097 off = (stub_entry->target_value
8098 + stub_entry->target_section->output_offset
8099 + stub_entry->target_section->output_section->vma);
8100
8101 bfd_put_64 (htab->brlt->owner, off,
8102 htab->brlt->contents + br_entry->offset);
8103
8104 if (htab->relbrlt != NULL)
8105 {
8106 /* Create a reloc for the branch lookup table entry. */
8107 Elf_Internal_Rela rela;
8108 bfd_byte *rl;
8109
8110 rela.r_offset = (br_entry->offset
8111 + htab->brlt->output_offset
8112 + htab->brlt->output_section->vma);
8113 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8114 rela.r_addend = off;
8115
8116 rl = htab->relbrlt->contents;
8117 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8118 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8119 }
8120
8121 off = (br_entry->offset
8122 + htab->brlt->output_offset
8123 + htab->brlt->output_section->vma
8124 - elf_gp (htab->brlt->output_section->owner)
8125 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8126
8127 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8128 {
8129 (*_bfd_error_handler)
8130 (_("linkage table error against `%s'"),
8131 stub_entry->root.string);
8132 bfd_set_error (bfd_error_bad_value);
8133 htab->stub_error = TRUE;
8134 return FALSE;
8135 }
8136
8137 indx = off;
8138 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8139 {
8140 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8141 loc += 4;
8142 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8143 size = 16;
8144 }
8145 else
8146 {
8147 bfd_vma r2off;
8148
8149 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8150 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8151 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8152 loc += 4;
8153 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8154 loc += 4;
8155 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8156 loc += 4;
8157 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8158 loc += 4;
8159 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8160 size = 28;
8161 }
8162 loc += 4;
8163 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8164 loc += 4;
8165 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8166 break;
8167
8168 case ppc_stub_plt_call:
8169 /* Do the best we can for shared libraries built without
8170 exporting ".foo" for each "foo". This can happen when symbol
8171 versioning scripts strip all bar a subset of symbols. */
8172 if (stub_entry->h->oh != NULL
8173 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8174 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8175 {
8176 /* Point the symbol at the stub. There may be multiple stubs,
8177 we don't really care; The main thing is to make this sym
8178 defined somewhere. Maybe defining the symbol in the stub
8179 section is a silly idea. If we didn't do this, htab->top_id
8180 could disappear. */
8181 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8182 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8183 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8184 }
8185
8186 /* Now build the stub. */
8187 off = (bfd_vma) -1;
8188 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8189 if (ent->addend == stub_entry->addend)
8190 {
8191 off = ent->plt.offset;
8192 break;
8193 }
8194 if (off >= (bfd_vma) -2)
8195 abort ();
8196
8197 off &= ~ (bfd_vma) 1;
8198 off += (htab->plt->output_offset
8199 + htab->plt->output_section->vma
8200 - elf_gp (htab->plt->output_section->owner)
8201 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8202
8203 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8204 {
8205 (*_bfd_error_handler)
8206 (_("linkage table error against `%s'"),
8207 stub_entry->h->elf.root.root.string);
8208 bfd_set_error (bfd_error_bad_value);
8209 htab->stub_error = TRUE;
8210 return FALSE;
8211 }
8212
8213 p = build_plt_stub (htab->stub_bfd, loc, off);
8214 size = p - loc;
8215 break;
8216
8217 default:
8218 BFD_FAIL ();
8219 return FALSE;
8220 }
8221
8222 stub_entry->stub_sec->size += size;
8223
8224 if (htab->emit_stub_syms)
8225 {
8226 struct elf_link_hash_entry *h;
8227 size_t len1, len2;
8228 char *name;
8229 const char *const stub_str[] = { "long_branch",
8230 "long_branch_r2off",
8231 "plt_branch",
8232 "plt_branch_r2off",
8233 "plt_call" };
8234
8235 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8236 len2 = strlen (stub_entry->root.string);
8237 name = bfd_malloc (len1 + len2 + 2);
8238 if (name == NULL)
8239 return FALSE;
8240 memcpy (name, stub_entry->root.string, 9);
8241 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8242 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8243 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8244 if (h == NULL)
8245 return FALSE;
8246 if (h->root.type == bfd_link_hash_new)
8247 {
8248 h->root.type = bfd_link_hash_defined;
8249 h->root.u.def.section = stub_entry->stub_sec;
8250 h->root.u.def.value = stub_entry->stub_offset;
8251 h->ref_regular = 1;
8252 h->def_regular = 1;
8253 h->ref_regular_nonweak = 1;
8254 h->forced_local = 1;
8255 h->non_elf = 0;
8256 }
8257 }
8258
8259 return TRUE;
8260 }
8261
8262 /* As above, but don't actually build the stub. Just bump offset so
8263 we know stub section sizes, and select plt_branch stubs where
8264 long_branch stubs won't do. */
8265
8266 static bfd_boolean
8267 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8268 {
8269 struct ppc_stub_hash_entry *stub_entry;
8270 struct bfd_link_info *info;
8271 struct ppc_link_hash_table *htab;
8272 bfd_vma off;
8273 int size;
8274
8275 /* Massage our args to the form they really have. */
8276 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8277 info = in_arg;
8278
8279 htab = ppc_hash_table (info);
8280
8281 if (stub_entry->stub_type == ppc_stub_plt_call)
8282 {
8283 struct plt_entry *ent;
8284 off = (bfd_vma) -1;
8285 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8286 if (ent->addend == stub_entry->addend)
8287 {
8288 off = ent->plt.offset & ~(bfd_vma) 1;
8289 break;
8290 }
8291 if (off >= (bfd_vma) -2)
8292 abort ();
8293 off += (htab->plt->output_offset
8294 + htab->plt->output_section->vma
8295 - elf_gp (htab->plt->output_section->owner)
8296 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8297
8298 size = PLT_CALL_STUB_SIZE;
8299 if (PPC_HA (off + 16) != PPC_HA (off))
8300 size += 4;
8301 }
8302 else
8303 {
8304 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8305 variants. */
8306 off = (stub_entry->target_value
8307 + stub_entry->target_section->output_offset
8308 + stub_entry->target_section->output_section->vma);
8309 off -= (stub_entry->stub_sec->size
8310 + stub_entry->stub_sec->output_offset
8311 + stub_entry->stub_sec->output_section->vma);
8312
8313 /* Reset the stub type from the plt variant in case we now
8314 can reach with a shorter stub. */
8315 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8316 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8317
8318 size = 4;
8319 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8320 {
8321 off -= 12;
8322 size = 16;
8323 }
8324
8325 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8326 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8327 {
8328 struct ppc_branch_hash_entry *br_entry;
8329
8330 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8331 stub_entry->root.string + 9,
8332 TRUE, FALSE);
8333 if (br_entry == NULL)
8334 {
8335 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8336 stub_entry->root.string + 9);
8337 htab->stub_error = TRUE;
8338 return FALSE;
8339 }
8340
8341 if (br_entry->iter != htab->stub_iteration)
8342 {
8343 br_entry->iter = htab->stub_iteration;
8344 br_entry->offset = htab->brlt->size;
8345 htab->brlt->size += 8;
8346
8347 if (htab->relbrlt != NULL)
8348 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8349 }
8350
8351 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8352 size = 16;
8353 if (stub_entry->stub_type != ppc_stub_plt_branch)
8354 size = 28;
8355 }
8356
8357 if (info->emitrelocations
8358 && (stub_entry->stub_type == ppc_stub_long_branch
8359 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8360 stub_entry->stub_sec->reloc_count += 1;
8361 }
8362
8363 stub_entry->stub_sec->size += size;
8364 return TRUE;
8365 }
8366
8367 /* Set up various things so that we can make a list of input sections
8368 for each output section included in the link. Returns -1 on error,
8369 0 when no stubs will be needed, and 1 on success. */
8370
8371 int
8372 ppc64_elf_setup_section_lists (bfd *output_bfd,
8373 struct bfd_link_info *info,
8374 int no_multi_toc)
8375 {
8376 bfd *input_bfd;
8377 int top_id, top_index, id;
8378 asection *section;
8379 asection **input_list;
8380 bfd_size_type amt;
8381 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8382
8383 htab->no_multi_toc = no_multi_toc;
8384
8385 if (htab->brlt == NULL)
8386 return 0;
8387
8388 /* Find the top input section id. */
8389 for (input_bfd = info->input_bfds, top_id = 3;
8390 input_bfd != NULL;
8391 input_bfd = input_bfd->link_next)
8392 {
8393 for (section = input_bfd->sections;
8394 section != NULL;
8395 section = section->next)
8396 {
8397 if (top_id < section->id)
8398 top_id = section->id;
8399 }
8400 }
8401
8402 htab->top_id = top_id;
8403 amt = sizeof (struct map_stub) * (top_id + 1);
8404 htab->stub_group = bfd_zmalloc (amt);
8405 if (htab->stub_group == NULL)
8406 return -1;
8407
8408 /* Set toc_off for com, und, abs and ind sections. */
8409 for (id = 0; id < 3; id++)
8410 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8411
8412 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8413
8414 /* We can't use output_bfd->section_count here to find the top output
8415 section index as some sections may have been removed, and
8416 strip_excluded_output_sections doesn't renumber the indices. */
8417 for (section = output_bfd->sections, top_index = 0;
8418 section != NULL;
8419 section = section->next)
8420 {
8421 if (top_index < section->index)
8422 top_index = section->index;
8423 }
8424
8425 htab->top_index = top_index;
8426 amt = sizeof (asection *) * (top_index + 1);
8427 input_list = bfd_zmalloc (amt);
8428 htab->input_list = input_list;
8429 if (input_list == NULL)
8430 return -1;
8431
8432 return 1;
8433 }
8434
8435 /* The linker repeatedly calls this function for each TOC input section
8436 and linker generated GOT section. Group input bfds such that the toc
8437 within a group is less than 64k in size. Will break with cute linker
8438 scripts that play games with dot in the output toc section. */
8439
8440 void
8441 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8442 {
8443 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8444
8445 if (!htab->no_multi_toc)
8446 {
8447 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8448 bfd_vma off = addr - htab->toc_curr;
8449
8450 if (off + isec->size > 0x10000)
8451 htab->toc_curr = addr;
8452
8453 elf_gp (isec->owner) = (htab->toc_curr
8454 - elf_gp (isec->output_section->owner)
8455 + TOC_BASE_OFF);
8456 }
8457 }
8458
8459 /* Called after the last call to the above function. */
8460
8461 void
8462 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8463 {
8464 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8465
8466 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8467
8468 /* toc_curr tracks the TOC offset used for code sections below in
8469 ppc64_elf_next_input_section. Start off at 0x8000. */
8470 htab->toc_curr = TOC_BASE_OFF;
8471 }
8472
8473 /* No toc references were found in ISEC. If the code in ISEC makes no
8474 calls, then there's no need to use toc adjusting stubs when branching
8475 into ISEC. Actually, indirect calls from ISEC are OK as they will
8476 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8477 needed, and 2 if a cyclical call-graph was found but no other reason
8478 for a stub was detected. If called from the top level, a return of
8479 2 means the same as a return of 0. */
8480
8481 static int
8482 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8483 {
8484 Elf_Internal_Rela *relstart, *rel;
8485 Elf_Internal_Sym *local_syms;
8486 int ret;
8487 struct ppc_link_hash_table *htab;
8488
8489 /* We know none of our code bearing sections will need toc stubs. */
8490 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8491 return 0;
8492
8493 if (isec->size == 0)
8494 return 0;
8495
8496 if (isec->output_section == NULL)
8497 return 0;
8498
8499 /* Hack for linux kernel. .fixup contains branches, but only back to
8500 the function that hit an exception. */
8501 if (strcmp (isec->name, ".fixup") == 0)
8502 return 0;
8503
8504 if (isec->reloc_count == 0)
8505 return 0;
8506
8507 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8508 info->keep_memory);
8509 if (relstart == NULL)
8510 return -1;
8511
8512 /* Look for branches to outside of this section. */
8513 local_syms = NULL;
8514 ret = 0;
8515 htab = ppc_hash_table (info);
8516 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8517 {
8518 enum elf_ppc64_reloc_type r_type;
8519 unsigned long r_symndx;
8520 struct elf_link_hash_entry *h;
8521 Elf_Internal_Sym *sym;
8522 asection *sym_sec;
8523 long *opd_adjust;
8524 bfd_vma sym_value;
8525 bfd_vma dest;
8526
8527 r_type = ELF64_R_TYPE (rel->r_info);
8528 if (r_type != R_PPC64_REL24
8529 && r_type != R_PPC64_REL14
8530 && r_type != R_PPC64_REL14_BRTAKEN
8531 && r_type != R_PPC64_REL14_BRNTAKEN)
8532 continue;
8533
8534 r_symndx = ELF64_R_SYM (rel->r_info);
8535 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8536 isec->owner))
8537 {
8538 ret = -1;
8539 break;
8540 }
8541
8542 /* Calls to dynamic lib functions go through a plt call stub
8543 that uses r2. Branches to undefined symbols might be a call
8544 using old-style dot symbols that can be satisfied by a plt
8545 call into a new-style dynamic library. */
8546 if (sym_sec == NULL)
8547 {
8548 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8549 if (eh != NULL
8550 && eh->oh != NULL
8551 && eh->oh->elf.plt.plist != NULL)
8552 {
8553 ret = 1;
8554 break;
8555 }
8556
8557 /* Ignore other undefined symbols. */
8558 continue;
8559 }
8560
8561 /* Assume branches to other sections not included in the link need
8562 stubs too, to cover -R and absolute syms. */
8563 if (sym_sec->output_section == NULL)
8564 {
8565 ret = 1;
8566 break;
8567 }
8568
8569 if (h == NULL)
8570 sym_value = sym->st_value;
8571 else
8572 {
8573 if (h->root.type != bfd_link_hash_defined
8574 && h->root.type != bfd_link_hash_defweak)
8575 abort ();
8576 sym_value = h->root.u.def.value;
8577 }
8578 sym_value += rel->r_addend;
8579
8580 /* If this branch reloc uses an opd sym, find the code section. */
8581 opd_adjust = get_opd_info (sym_sec);
8582 if (opd_adjust != NULL)
8583 {
8584 if (h == NULL)
8585 {
8586 long adjust;
8587
8588 adjust = opd_adjust[sym->st_value / 8];
8589 if (adjust == -1)
8590 /* Assume deleted functions won't ever be called. */
8591 continue;
8592 sym_value += adjust;
8593 }
8594
8595 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8596 if (dest == (bfd_vma) -1)
8597 continue;
8598 }
8599 else
8600 dest = (sym_value
8601 + sym_sec->output_offset
8602 + sym_sec->output_section->vma);
8603
8604 /* Ignore branch to self. */
8605 if (sym_sec == isec)
8606 continue;
8607
8608 /* If the called function uses the toc, we need a stub. */
8609 if (sym_sec->has_toc_reloc
8610 || sym_sec->makes_toc_func_call)
8611 {
8612 ret = 1;
8613 break;
8614 }
8615
8616 /* Assume any branch that needs a long branch stub might in fact
8617 need a plt_branch stub. A plt_branch stub uses r2. */
8618 else if (dest - (isec->output_offset
8619 + isec->output_section->vma
8620 + rel->r_offset) + (1 << 25) >= (2 << 25))
8621 {
8622 ret = 1;
8623 break;
8624 }
8625
8626 /* If calling back to a section in the process of being tested, we
8627 can't say for sure that no toc adjusting stubs are needed, so
8628 don't return zero. */
8629 else if (sym_sec->call_check_in_progress)
8630 ret = 2;
8631
8632 /* Branches to another section that itself doesn't have any TOC
8633 references are OK. Recursively call ourselves to check. */
8634 else if (sym_sec->id <= htab->top_id
8635 && htab->stub_group[sym_sec->id].toc_off == 0)
8636 {
8637 int recur;
8638
8639 /* Mark current section as indeterminate, so that other
8640 sections that call back to current won't be marked as
8641 known. */
8642 isec->call_check_in_progress = 1;
8643 recur = toc_adjusting_stub_needed (info, sym_sec);
8644 isec->call_check_in_progress = 0;
8645
8646 if (recur < 0)
8647 {
8648 /* An error. Exit. */
8649 ret = -1;
8650 break;
8651 }
8652 else if (recur <= 1)
8653 {
8654 /* Known result. Mark as checked and set section flag. */
8655 htab->stub_group[sym_sec->id].toc_off = 1;
8656 if (recur != 0)
8657 {
8658 sym_sec->makes_toc_func_call = 1;
8659 ret = 1;
8660 break;
8661 }
8662 }
8663 else
8664 {
8665 /* Unknown result. Continue checking. */
8666 ret = 2;
8667 }
8668 }
8669 }
8670
8671 if (local_syms != NULL
8672 && (elf_tdata (isec->owner)->symtab_hdr.contents
8673 != (unsigned char *) local_syms))
8674 free (local_syms);
8675 if (elf_section_data (isec)->relocs != relstart)
8676 free (relstart);
8677
8678 return ret;
8679 }
8680
8681 /* The linker repeatedly calls this function for each input section,
8682 in the order that input sections are linked into output sections.
8683 Build lists of input sections to determine groupings between which
8684 we may insert linker stubs. */
8685
8686 bfd_boolean
8687 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8688 {
8689 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8690
8691 if ((isec->output_section->flags & SEC_CODE) != 0
8692 && isec->output_section->index <= htab->top_index)
8693 {
8694 asection **list = htab->input_list + isec->output_section->index;
8695 /* Steal the link_sec pointer for our list. */
8696 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8697 /* This happens to make the list in reverse order,
8698 which is what we want. */
8699 PREV_SEC (isec) = *list;
8700 *list = isec;
8701 }
8702
8703 if (htab->multi_toc_needed)
8704 {
8705 /* If a code section has a function that uses the TOC then we need
8706 to use the right TOC (obviously). Also, make sure that .opd gets
8707 the correct TOC value for R_PPC64_TOC relocs that don't have or
8708 can't find their function symbol (shouldn't ever happen now). */
8709 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8710 {
8711 if (elf_gp (isec->owner) != 0)
8712 htab->toc_curr = elf_gp (isec->owner);
8713 }
8714 else if (htab->stub_group[isec->id].toc_off == 0)
8715 {
8716 int ret = toc_adjusting_stub_needed (info, isec);
8717 if (ret < 0)
8718 return FALSE;
8719 else
8720 isec->makes_toc_func_call = ret & 1;
8721 }
8722 }
8723
8724 /* Functions that don't use the TOC can belong in any TOC group.
8725 Use the last TOC base. This happens to make _init and _fini
8726 pasting work. */
8727 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8728 return TRUE;
8729 }
8730
8731 /* See whether we can group stub sections together. Grouping stub
8732 sections may result in fewer stubs. More importantly, we need to
8733 put all .init* and .fini* stubs at the beginning of the .init or
8734 .fini output sections respectively, because glibc splits the
8735 _init and _fini functions into multiple parts. Putting a stub in
8736 the middle of a function is not a good idea. */
8737
8738 static void
8739 group_sections (struct ppc_link_hash_table *htab,
8740 bfd_size_type stub_group_size,
8741 bfd_boolean stubs_always_before_branch)
8742 {
8743 asection **list = htab->input_list + htab->top_index;
8744 do
8745 {
8746 asection *tail = *list;
8747 while (tail != NULL)
8748 {
8749 asection *curr;
8750 asection *prev;
8751 bfd_size_type total;
8752 bfd_boolean big_sec;
8753 bfd_vma curr_toc;
8754
8755 curr = tail;
8756 total = tail->size;
8757 big_sec = total >= stub_group_size;
8758 curr_toc = htab->stub_group[tail->id].toc_off;
8759
8760 while ((prev = PREV_SEC (curr)) != NULL
8761 && ((total += curr->output_offset - prev->output_offset)
8762 < stub_group_size)
8763 && htab->stub_group[prev->id].toc_off == curr_toc)
8764 curr = prev;
8765
8766 /* OK, the size from the start of CURR to the end is less
8767 than stub_group_size and thus can be handled by one stub
8768 section. (or the tail section is itself larger than
8769 stub_group_size, in which case we may be toast.) We
8770 should really be keeping track of the total size of stubs
8771 added here, as stubs contribute to the final output
8772 section size. That's a little tricky, and this way will
8773 only break if stubs added make the total size more than
8774 2^25, ie. for the default stub_group_size, if stubs total
8775 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8776 do
8777 {
8778 prev = PREV_SEC (tail);
8779 /* Set up this stub group. */
8780 htab->stub_group[tail->id].link_sec = curr;
8781 }
8782 while (tail != curr && (tail = prev) != NULL);
8783
8784 /* But wait, there's more! Input sections up to stub_group_size
8785 bytes before the stub section can be handled by it too.
8786 Don't do this if we have a really large section after the
8787 stubs, as adding more stubs increases the chance that
8788 branches may not reach into the stub section. */
8789 if (!stubs_always_before_branch && !big_sec)
8790 {
8791 total = 0;
8792 while (prev != NULL
8793 && ((total += tail->output_offset - prev->output_offset)
8794 < stub_group_size)
8795 && htab->stub_group[prev->id].toc_off == curr_toc)
8796 {
8797 tail = prev;
8798 prev = PREV_SEC (tail);
8799 htab->stub_group[tail->id].link_sec = curr;
8800 }
8801 }
8802 tail = prev;
8803 }
8804 }
8805 while (list-- != htab->input_list);
8806 free (htab->input_list);
8807 #undef PREV_SEC
8808 }
8809
8810 /* Determine and set the size of the stub section for a final link.
8811
8812 The basic idea here is to examine all the relocations looking for
8813 PC-relative calls to a target that is unreachable with a "bl"
8814 instruction. */
8815
8816 bfd_boolean
8817 ppc64_elf_size_stubs (bfd *output_bfd,
8818 struct bfd_link_info *info,
8819 bfd_signed_vma group_size,
8820 asection *(*add_stub_section) (const char *, asection *),
8821 void (*layout_sections_again) (void))
8822 {
8823 bfd_size_type stub_group_size;
8824 bfd_boolean stubs_always_before_branch;
8825 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8826
8827 /* Stash our params away. */
8828 htab->add_stub_section = add_stub_section;
8829 htab->layout_sections_again = layout_sections_again;
8830 stubs_always_before_branch = group_size < 0;
8831 if (group_size < 0)
8832 stub_group_size = -group_size;
8833 else
8834 stub_group_size = group_size;
8835 if (stub_group_size == 1)
8836 {
8837 /* Default values. */
8838 if (stubs_always_before_branch)
8839 {
8840 stub_group_size = 0x1e00000;
8841 if (htab->has_14bit_branch)
8842 stub_group_size = 0x7800;
8843 }
8844 else
8845 {
8846 stub_group_size = 0x1c00000;
8847 if (htab->has_14bit_branch)
8848 stub_group_size = 0x7000;
8849 }
8850 }
8851
8852 group_sections (htab, stub_group_size, stubs_always_before_branch);
8853
8854 while (1)
8855 {
8856 bfd *input_bfd;
8857 unsigned int bfd_indx;
8858 asection *stub_sec;
8859 bfd_boolean stub_changed;
8860
8861 htab->stub_iteration += 1;
8862 stub_changed = FALSE;
8863
8864 for (input_bfd = info->input_bfds, bfd_indx = 0;
8865 input_bfd != NULL;
8866 input_bfd = input_bfd->link_next, bfd_indx++)
8867 {
8868 Elf_Internal_Shdr *symtab_hdr;
8869 asection *section;
8870 Elf_Internal_Sym *local_syms = NULL;
8871
8872 /* We'll need the symbol table in a second. */
8873 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8874 if (symtab_hdr->sh_info == 0)
8875 continue;
8876
8877 /* Walk over each section attached to the input bfd. */
8878 for (section = input_bfd->sections;
8879 section != NULL;
8880 section = section->next)
8881 {
8882 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8883
8884 /* If there aren't any relocs, then there's nothing more
8885 to do. */
8886 if ((section->flags & SEC_RELOC) == 0
8887 || section->reloc_count == 0)
8888 continue;
8889
8890 /* If this section is a link-once section that will be
8891 discarded, then don't create any stubs. */
8892 if (section->output_section == NULL
8893 || section->output_section->owner != output_bfd)
8894 continue;
8895
8896 /* Get the relocs. */
8897 internal_relocs
8898 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8899 info->keep_memory);
8900 if (internal_relocs == NULL)
8901 goto error_ret_free_local;
8902
8903 /* Now examine each relocation. */
8904 irela = internal_relocs;
8905 irelaend = irela + section->reloc_count;
8906 for (; irela < irelaend; irela++)
8907 {
8908 enum elf_ppc64_reloc_type r_type;
8909 unsigned int r_indx;
8910 enum ppc_stub_type stub_type;
8911 struct ppc_stub_hash_entry *stub_entry;
8912 asection *sym_sec, *code_sec;
8913 bfd_vma sym_value;
8914 bfd_vma destination;
8915 bfd_boolean ok_dest;
8916 struct ppc_link_hash_entry *hash;
8917 struct ppc_link_hash_entry *fdh;
8918 struct elf_link_hash_entry *h;
8919 Elf_Internal_Sym *sym;
8920 char *stub_name;
8921 const asection *id_sec;
8922 long *opd_adjust;
8923
8924 r_type = ELF64_R_TYPE (irela->r_info);
8925 r_indx = ELF64_R_SYM (irela->r_info);
8926
8927 if (r_type >= R_PPC64_max)
8928 {
8929 bfd_set_error (bfd_error_bad_value);
8930 goto error_ret_free_internal;
8931 }
8932
8933 /* Only look for stubs on branch instructions. */
8934 if (r_type != R_PPC64_REL24
8935 && r_type != R_PPC64_REL14
8936 && r_type != R_PPC64_REL14_BRTAKEN
8937 && r_type != R_PPC64_REL14_BRNTAKEN)
8938 continue;
8939
8940 /* Now determine the call target, its name, value,
8941 section. */
8942 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8943 r_indx, input_bfd))
8944 goto error_ret_free_internal;
8945 hash = (struct ppc_link_hash_entry *) h;
8946
8947 ok_dest = FALSE;
8948 fdh = NULL;
8949 if (hash == NULL)
8950 {
8951 sym_value = sym->st_value;
8952 ok_dest = TRUE;
8953 }
8954 else
8955 {
8956 sym_value = 0;
8957 /* Recognise an old ABI func code entry sym, and
8958 use the func descriptor sym instead. */
8959 if (hash->elf.root.root.string[0] == '.'
8960 && (fdh = get_fdh (hash, htab)) != NULL)
8961 {
8962 if (fdh->elf.root.type == bfd_link_hash_defined
8963 || fdh->elf.root.type == bfd_link_hash_defweak)
8964 {
8965 sym_sec = fdh->elf.root.u.def.section;
8966 sym_value = fdh->elf.root.u.def.value;
8967 if (sym_sec->output_section != NULL)
8968 ok_dest = TRUE;
8969 }
8970 else
8971 fdh = NULL;
8972 }
8973 else if (hash->elf.root.type == bfd_link_hash_defined
8974 || hash->elf.root.type == bfd_link_hash_defweak)
8975 {
8976 sym_value = hash->elf.root.u.def.value;
8977 if (sym_sec->output_section != NULL)
8978 ok_dest = TRUE;
8979 }
8980 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8981 ;
8982 else if (hash->elf.root.type == bfd_link_hash_undefined)
8983 ;
8984 else
8985 {
8986 bfd_set_error (bfd_error_bad_value);
8987 goto error_ret_free_internal;
8988 }
8989 }
8990
8991 destination = 0;
8992 if (ok_dest)
8993 {
8994 sym_value += irela->r_addend;
8995 destination = (sym_value
8996 + sym_sec->output_offset
8997 + sym_sec->output_section->vma);
8998 }
8999
9000 code_sec = sym_sec;
9001 opd_adjust = get_opd_info (sym_sec);
9002 if (opd_adjust != NULL)
9003 {
9004 bfd_vma dest;
9005
9006 if (hash == NULL)
9007 {
9008 long adjust = opd_adjust[sym_value / 8];
9009 if (adjust == -1)
9010 continue;
9011 sym_value += adjust;
9012 }
9013 dest = opd_entry_value (sym_sec, sym_value,
9014 &code_sec, &sym_value);
9015 if (dest != (bfd_vma) -1)
9016 {
9017 destination = dest;
9018 if (fdh != NULL)
9019 {
9020 /* Fixup old ABI sym to point at code
9021 entry. */
9022 hash->elf.root.type = bfd_link_hash_defweak;
9023 hash->elf.root.u.def.section = code_sec;
9024 hash->elf.root.u.def.value = sym_value;
9025 }
9026 }
9027 }
9028
9029 /* Determine what (if any) linker stub is needed. */
9030 stub_type = ppc_type_of_stub (section, irela, &hash,
9031 destination);
9032
9033 if (stub_type != ppc_stub_plt_call)
9034 {
9035 /* Check whether we need a TOC adjusting stub.
9036 Since the linker pastes together pieces from
9037 different object files when creating the
9038 _init and _fini functions, it may be that a
9039 call to what looks like a local sym is in
9040 fact a call needing a TOC adjustment. */
9041 if (code_sec != NULL
9042 && code_sec->output_section != NULL
9043 && (htab->stub_group[code_sec->id].toc_off
9044 != htab->stub_group[section->id].toc_off)
9045 && (code_sec->has_toc_reloc
9046 || code_sec->makes_toc_func_call))
9047 stub_type = ppc_stub_long_branch_r2off;
9048 }
9049
9050 if (stub_type == ppc_stub_none)
9051 continue;
9052
9053 /* __tls_get_addr calls might be eliminated. */
9054 if (stub_type != ppc_stub_plt_call
9055 && hash != NULL
9056 && (hash == htab->tls_get_addr
9057 || hash == htab->tls_get_addr_fd)
9058 && section->has_tls_reloc
9059 && irela != internal_relocs)
9060 {
9061 /* Get tls info. */
9062 char *tls_mask;
9063
9064 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9065 irela - 1, input_bfd))
9066 goto error_ret_free_internal;
9067 if (*tls_mask != 0)
9068 continue;
9069 }
9070
9071 /* Support for grouping stub sections. */
9072 id_sec = htab->stub_group[section->id].link_sec;
9073
9074 /* Get the name of this stub. */
9075 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9076 if (!stub_name)
9077 goto error_ret_free_internal;
9078
9079 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9080 stub_name, FALSE, FALSE);
9081 if (stub_entry != NULL)
9082 {
9083 /* The proper stub has already been created. */
9084 free (stub_name);
9085 continue;
9086 }
9087
9088 stub_entry = ppc_add_stub (stub_name, section, htab);
9089 if (stub_entry == NULL)
9090 {
9091 free (stub_name);
9092 error_ret_free_internal:
9093 if (elf_section_data (section)->relocs == NULL)
9094 free (internal_relocs);
9095 error_ret_free_local:
9096 if (local_syms != NULL
9097 && (symtab_hdr->contents
9098 != (unsigned char *) local_syms))
9099 free (local_syms);
9100 return FALSE;
9101 }
9102
9103 stub_entry->stub_type = stub_type;
9104 stub_entry->target_value = sym_value;
9105 stub_entry->target_section = code_sec;
9106 stub_entry->h = hash;
9107 stub_entry->addend = irela->r_addend;
9108
9109 if (stub_entry->h != NULL)
9110 htab->stub_globals += 1;
9111
9112 stub_changed = TRUE;
9113 }
9114
9115 /* We're done with the internal relocs, free them. */
9116 if (elf_section_data (section)->relocs != internal_relocs)
9117 free (internal_relocs);
9118 }
9119
9120 if (local_syms != NULL
9121 && symtab_hdr->contents != (unsigned char *) local_syms)
9122 {
9123 if (!info->keep_memory)
9124 free (local_syms);
9125 else
9126 symtab_hdr->contents = (unsigned char *) local_syms;
9127 }
9128 }
9129
9130 if (!stub_changed)
9131 break;
9132
9133 /* OK, we've added some stubs. Find out the new size of the
9134 stub sections. */
9135 for (stub_sec = htab->stub_bfd->sections;
9136 stub_sec != NULL;
9137 stub_sec = stub_sec->next)
9138 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9139 {
9140 stub_sec->size = 0;
9141 stub_sec->reloc_count = 0;
9142 }
9143
9144 htab->brlt->size = 0;
9145 if (htab->relbrlt != NULL)
9146 htab->relbrlt->size = 0;
9147
9148 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9149
9150 /* Ask the linker to do its stuff. */
9151 (*htab->layout_sections_again) ();
9152 }
9153
9154 /* It would be nice to strip .branch_lt from the output if the
9155 section is empty, but it's too late. If we strip sections here,
9156 the dynamic symbol table is corrupted since the section symbol
9157 for the stripped section isn't written. */
9158
9159 return TRUE;
9160 }
9161
9162 /* Called after we have determined section placement. If sections
9163 move, we'll be called again. Provide a value for TOCstart. */
9164
9165 bfd_vma
9166 ppc64_elf_toc (bfd *obfd)
9167 {
9168 asection *s;
9169 bfd_vma TOCstart;
9170
9171 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9172 order. The TOC starts where the first of these sections starts. */
9173 s = bfd_get_section_by_name (obfd, ".got");
9174 if (s == NULL)
9175 s = bfd_get_section_by_name (obfd, ".toc");
9176 if (s == NULL)
9177 s = bfd_get_section_by_name (obfd, ".tocbss");
9178 if (s == NULL)
9179 s = bfd_get_section_by_name (obfd, ".plt");
9180 if (s == NULL)
9181 {
9182 /* This may happen for
9183 o references to TOC base (SYM@toc / TOC[tc0]) without a
9184 .toc directive
9185 o bad linker script
9186 o --gc-sections and empty TOC sections
9187
9188 FIXME: Warn user? */
9189
9190 /* Look for a likely section. We probably won't even be
9191 using TOCstart. */
9192 for (s = obfd->sections; s != NULL; s = s->next)
9193 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9194 == (SEC_ALLOC | SEC_SMALL_DATA))
9195 break;
9196 if (s == NULL)
9197 for (s = obfd->sections; s != NULL; s = s->next)
9198 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9199 == (SEC_ALLOC | SEC_SMALL_DATA))
9200 break;
9201 if (s == NULL)
9202 for (s = obfd->sections; s != NULL; s = s->next)
9203 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9204 break;
9205 if (s == NULL)
9206 for (s = obfd->sections; s != NULL; s = s->next)
9207 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9208 break;
9209 }
9210
9211 TOCstart = 0;
9212 if (s != NULL)
9213 TOCstart = s->output_section->vma + s->output_offset;
9214
9215 return TOCstart;
9216 }
9217
9218 /* Build all the stubs associated with the current output file.
9219 The stubs are kept in a hash table attached to the main linker
9220 hash table. This function is called via gldelf64ppc_finish. */
9221
9222 bfd_boolean
9223 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9224 struct bfd_link_info *info,
9225 char **stats)
9226 {
9227 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9228 asection *stub_sec;
9229 bfd_byte *p;
9230 int stub_sec_count = 0;
9231
9232 htab->emit_stub_syms = emit_stub_syms;
9233
9234 /* Allocate memory to hold the linker stubs. */
9235 for (stub_sec = htab->stub_bfd->sections;
9236 stub_sec != NULL;
9237 stub_sec = stub_sec->next)
9238 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9239 && stub_sec->size != 0)
9240 {
9241 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9242 if (stub_sec->contents == NULL)
9243 return FALSE;
9244 /* We want to check that built size is the same as calculated
9245 size. rawsize is a convenient location to use. */
9246 stub_sec->rawsize = stub_sec->size;
9247 stub_sec->size = 0;
9248 }
9249
9250 if (htab->plt != NULL)
9251 {
9252 unsigned int indx;
9253 bfd_vma plt0;
9254
9255 /* Build the .glink plt call stub. */
9256 plt0 = (htab->plt->output_section->vma
9257 + htab->plt->output_offset
9258 - (htab->glink->output_section->vma
9259 + htab->glink->output_offset
9260 + GLINK_CALL_STUB_SIZE));
9261 if (plt0 + 0x80008000 > 0xffffffff)
9262 {
9263 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9264 bfd_set_error (bfd_error_bad_value);
9265 return FALSE;
9266 }
9267
9268 if (htab->emit_stub_syms)
9269 {
9270 struct elf_link_hash_entry *h;
9271 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9272 if (h == NULL)
9273 return FALSE;
9274 if (h->root.type == bfd_link_hash_new)
9275 {
9276 h->root.type = bfd_link_hash_defined;
9277 h->root.u.def.section = htab->glink;
9278 h->root.u.def.value = 0;
9279 h->ref_regular = 1;
9280 h->def_regular = 1;
9281 h->ref_regular_nonweak = 1;
9282 h->forced_local = 1;
9283 h->non_elf = 0;
9284 }
9285 }
9286 p = htab->glink->contents;
9287 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9288 p += 4;
9289 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9290 p += 4;
9291 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9292 p += 4;
9293 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9294 p += 4;
9295 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9296 p += 4;
9297 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9298 p += 4;
9299 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9300 p += 4;
9301 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9302 p += 4;
9303 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9304 p += 4;
9305 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9306 p += 4;
9307 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9308 p += 4;
9309 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9310 p += 4;
9311 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9312 p += 4;
9313 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9314 p += 4;
9315 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9316 p += 4;
9317 bfd_put_32 (htab->glink->owner, BCTR, p);
9318 p += 4;
9319
9320 /* Build the .glink lazy link call stubs. */
9321 indx = 0;
9322 while (p < htab->glink->contents + htab->glink->size)
9323 {
9324 if (indx < 0x8000)
9325 {
9326 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9327 p += 4;
9328 }
9329 else
9330 {
9331 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9332 p += 4;
9333 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9334 p += 4;
9335 }
9336 bfd_put_32 (htab->glink->owner,
9337 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9338 indx++;
9339 p += 4;
9340 }
9341 htab->glink->rawsize = p - htab->glink->contents;
9342 }
9343
9344 if (htab->brlt->size != 0)
9345 {
9346 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9347 htab->brlt->size);
9348 if (htab->brlt->contents == NULL)
9349 return FALSE;
9350 }
9351 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9352 {
9353 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9354 htab->relbrlt->size);
9355 if (htab->relbrlt->contents == NULL)
9356 return FALSE;
9357 }
9358
9359 /* Build the stubs as directed by the stub hash table. */
9360 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9361
9362 for (stub_sec = htab->stub_bfd->sections;
9363 stub_sec != NULL;
9364 stub_sec = stub_sec->next)
9365 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9366 {
9367 stub_sec_count += 1;
9368 if (stub_sec->rawsize != stub_sec->size)
9369 break;
9370 }
9371
9372 if (stub_sec != NULL
9373 || htab->glink->rawsize != htab->glink->size)
9374 {
9375 htab->stub_error = TRUE;
9376 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9377 }
9378
9379 if (htab->stub_error)
9380 return FALSE;
9381
9382 if (stats != NULL)
9383 {
9384 *stats = bfd_malloc (500);
9385 if (*stats == NULL)
9386 return FALSE;
9387
9388 sprintf (*stats, _("linker stubs in %u group%s\n"
9389 " branch %lu\n"
9390 " toc adjust %lu\n"
9391 " long branch %lu\n"
9392 " long toc adj %lu\n"
9393 " plt call %lu"),
9394 stub_sec_count,
9395 stub_sec_count == 1 ? "" : "s",
9396 htab->stub_count[ppc_stub_long_branch - 1],
9397 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9398 htab->stub_count[ppc_stub_plt_branch - 1],
9399 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9400 htab->stub_count[ppc_stub_plt_call - 1]);
9401 }
9402 return TRUE;
9403 }
9404
9405 /* This function undoes the changes made by add_symbol_adjust. */
9406
9407 static bfd_boolean
9408 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9409 {
9410 struct ppc_link_hash_entry *eh;
9411
9412 if (h->root.type == bfd_link_hash_indirect)
9413 return TRUE;
9414
9415 if (h->root.type == bfd_link_hash_warning)
9416 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9417
9418 eh = (struct ppc_link_hash_entry *) h;
9419 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9420 return TRUE;
9421
9422 eh->elf.root.type = bfd_link_hash_undefined;
9423 return TRUE;
9424 }
9425
9426 void
9427 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9428 {
9429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9430 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9431 }
9432
9433 /* The RELOCATE_SECTION function is called by the ELF backend linker
9434 to handle the relocations for a section.
9435
9436 The relocs are always passed as Rela structures; if the section
9437 actually uses Rel structures, the r_addend field will always be
9438 zero.
9439
9440 This function is responsible for adjust the section contents as
9441 necessary, and (if using Rela relocs and generating a
9442 relocatable output file) adjusting the reloc addend as
9443 necessary.
9444
9445 This function does not have to worry about setting the reloc
9446 address or the reloc symbol index.
9447
9448 LOCAL_SYMS is a pointer to the swapped in local symbols.
9449
9450 LOCAL_SECTIONS is an array giving the section in the input file
9451 corresponding to the st_shndx field of each local symbol.
9452
9453 The global hash table entry for the global symbols can be found
9454 via elf_sym_hashes (input_bfd).
9455
9456 When generating relocatable output, this function must handle
9457 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9458 going to be the section symbol corresponding to the output
9459 section, which means that the addend must be adjusted
9460 accordingly. */
9461
9462 static bfd_boolean
9463 ppc64_elf_relocate_section (bfd *output_bfd,
9464 struct bfd_link_info *info,
9465 bfd *input_bfd,
9466 asection *input_section,
9467 bfd_byte *contents,
9468 Elf_Internal_Rela *relocs,
9469 Elf_Internal_Sym *local_syms,
9470 asection **local_sections)
9471 {
9472 struct ppc_link_hash_table *htab;
9473 Elf_Internal_Shdr *symtab_hdr;
9474 struct elf_link_hash_entry **sym_hashes;
9475 Elf_Internal_Rela *rel;
9476 Elf_Internal_Rela *relend;
9477 Elf_Internal_Rela outrel;
9478 bfd_byte *loc;
9479 struct got_entry **local_got_ents;
9480 bfd_vma TOCstart;
9481 bfd_boolean ret = TRUE;
9482 bfd_boolean is_opd;
9483 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9484 bfd_boolean is_power4 = FALSE;
9485
9486 if (info->relocatable)
9487 return TRUE;
9488
9489 /* Initialize howto table if needed. */
9490 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9491 ppc_howto_init ();
9492
9493 htab = ppc_hash_table (info);
9494
9495 /* Don't relocate stub sections. */
9496 if (input_section->owner == htab->stub_bfd)
9497 return TRUE;
9498
9499 local_got_ents = elf_local_got_ents (input_bfd);
9500 TOCstart = elf_gp (output_bfd);
9501 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9502 sym_hashes = elf_sym_hashes (input_bfd);
9503 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9504
9505 rel = relocs;
9506 relend = relocs + input_section->reloc_count;
9507 for (; rel < relend; rel++)
9508 {
9509 enum elf_ppc64_reloc_type r_type;
9510 bfd_vma addend;
9511 bfd_reloc_status_type r;
9512 Elf_Internal_Sym *sym;
9513 asection *sec;
9514 struct elf_link_hash_entry *h_elf;
9515 struct ppc_link_hash_entry *h;
9516 struct ppc_link_hash_entry *fdh;
9517 const char *sym_name;
9518 unsigned long r_symndx, toc_symndx;
9519 char tls_mask, tls_gd, tls_type;
9520 char sym_type;
9521 bfd_vma relocation;
9522 bfd_boolean unresolved_reloc;
9523 bfd_boolean warned;
9524 unsigned long insn, mask;
9525 struct ppc_stub_hash_entry *stub_entry;
9526 bfd_vma max_br_offset;
9527 bfd_vma from;
9528
9529 r_type = ELF64_R_TYPE (rel->r_info);
9530 r_symndx = ELF64_R_SYM (rel->r_info);
9531
9532 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9533 symbol of the previous ADDR64 reloc. The symbol gives us the
9534 proper TOC base to use. */
9535 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9536 && rel != relocs
9537 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9538 && is_opd)
9539 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9540
9541 sym = NULL;
9542 sec = NULL;
9543 h_elf = NULL;
9544 sym_name = NULL;
9545 unresolved_reloc = FALSE;
9546 warned = FALSE;
9547
9548 if (r_symndx < symtab_hdr->sh_info)
9549 {
9550 /* It's a local symbol. */
9551 long *opd_adjust;
9552
9553 sym = local_syms + r_symndx;
9554 sec = local_sections[r_symndx];
9555 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9556 sym_type = ELF64_ST_TYPE (sym->st_info);
9557 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9558 opd_adjust = get_opd_info (sec);
9559 if (opd_adjust != NULL)
9560 {
9561 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9562 if (adjust == -1)
9563 relocation = 0;
9564 else
9565 relocation += adjust;
9566 }
9567 }
9568 else
9569 {
9570 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9571 r_symndx, symtab_hdr, sym_hashes,
9572 h_elf, sec, relocation,
9573 unresolved_reloc, warned);
9574 sym_name = h_elf->root.root.string;
9575 sym_type = h_elf->type;
9576 }
9577 h = (struct ppc_link_hash_entry *) h_elf;
9578
9579 /* TLS optimizations. Replace instruction sequences and relocs
9580 based on information we collected in tls_optimize. We edit
9581 RELOCS so that --emit-relocs will output something sensible
9582 for the final instruction stream. */
9583 tls_mask = 0;
9584 tls_gd = 0;
9585 toc_symndx = 0;
9586 if (IS_PPC64_TLS_RELOC (r_type))
9587 {
9588 if (h != NULL)
9589 tls_mask = h->tls_mask;
9590 else if (local_got_ents != NULL)
9591 {
9592 char *lgot_masks;
9593 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9594 tls_mask = lgot_masks[r_symndx];
9595 }
9596 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9597 {
9598 /* Check for toc tls entries. */
9599 char *toc_tls;
9600
9601 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9602 rel, input_bfd))
9603 return FALSE;
9604
9605 if (toc_tls)
9606 tls_mask = *toc_tls;
9607 }
9608 }
9609
9610 /* Check that tls relocs are used with tls syms, and non-tls
9611 relocs are used with non-tls syms. */
9612 if (r_symndx != 0
9613 && r_type != R_PPC64_NONE
9614 && (h == NULL
9615 || h->elf.root.type == bfd_link_hash_defined
9616 || h->elf.root.type == bfd_link_hash_defweak)
9617 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9618 {
9619 if (r_type == R_PPC64_TLS && tls_mask != 0)
9620 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9621 ;
9622 else
9623 (*_bfd_error_handler)
9624 (sym_type == STT_TLS
9625 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9626 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9627 input_bfd,
9628 input_section,
9629 (long) rel->r_offset,
9630 ppc64_elf_howto_table[r_type]->name,
9631 sym_name);
9632 }
9633
9634 /* Ensure reloc mapping code below stays sane. */
9635 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9636 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9637 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9638 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9639 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9640 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9641 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9642 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9643 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9644 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9645 abort ();
9646
9647 switch (r_type)
9648 {
9649 default:
9650 break;
9651
9652 case R_PPC64_TOC16:
9653 case R_PPC64_TOC16_LO:
9654 case R_PPC64_TOC16_DS:
9655 case R_PPC64_TOC16_LO_DS:
9656 {
9657 /* Check for toc tls entries. */
9658 char *toc_tls;
9659 int retval;
9660
9661 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9662 rel, input_bfd);
9663 if (retval == 0)
9664 return FALSE;
9665
9666 if (toc_tls)
9667 {
9668 tls_mask = *toc_tls;
9669 if (r_type == R_PPC64_TOC16_DS
9670 || r_type == R_PPC64_TOC16_LO_DS)
9671 {
9672 if (tls_mask != 0
9673 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9674 goto toctprel;
9675 }
9676 else
9677 {
9678 /* If we found a GD reloc pair, then we might be
9679 doing a GD->IE transition. */
9680 if (retval == 2)
9681 {
9682 tls_gd = TLS_TPRELGD;
9683 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9684 goto tls_get_addr_check;
9685 }
9686 else if (retval == 3)
9687 {
9688 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9689 goto tls_get_addr_check;
9690 }
9691 }
9692 }
9693 }
9694 break;
9695
9696 case R_PPC64_GOT_TPREL16_DS:
9697 case R_PPC64_GOT_TPREL16_LO_DS:
9698 if (tls_mask != 0
9699 && (tls_mask & TLS_TPREL) == 0)
9700 {
9701 toctprel:
9702 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9703 insn &= 31 << 21;
9704 insn |= 0x3c0d0000; /* addis 0,13,0 */
9705 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9706 r_type = R_PPC64_TPREL16_HA;
9707 if (toc_symndx != 0)
9708 {
9709 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9710 /* We changed the symbol. Start over in order to
9711 get h, sym, sec etc. right. */
9712 rel--;
9713 continue;
9714 }
9715 else
9716 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9717 }
9718 break;
9719
9720 case R_PPC64_TLS:
9721 if (tls_mask != 0
9722 && (tls_mask & TLS_TPREL) == 0)
9723 {
9724 bfd_vma rtra;
9725 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9726 if ((insn & ((0x3f << 26) | (31 << 11)))
9727 == ((31 << 26) | (13 << 11)))
9728 rtra = insn & ((1 << 26) - (1 << 16));
9729 else if ((insn & ((0x3f << 26) | (31 << 16)))
9730 == ((31 << 26) | (13 << 16)))
9731 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9732 else
9733 abort ();
9734 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9735 /* add -> addi. */
9736 insn = 14 << 26;
9737 else if ((insn & (31 << 1)) == 23 << 1
9738 && ((insn & (31 << 6)) < 14 << 6
9739 || ((insn & (31 << 6)) >= 16 << 6
9740 && (insn & (31 << 6)) < 24 << 6)))
9741 /* load and store indexed -> dform. */
9742 insn = (32 | ((insn >> 6) & 31)) << 26;
9743 else if ((insn & (31 << 1)) == 21 << 1
9744 && (insn & (0x1a << 6)) == 0)
9745 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9746 insn = (((58 | ((insn >> 6) & 4)) << 26)
9747 | ((insn >> 6) & 1));
9748 else if ((insn & (31 << 1)) == 21 << 1
9749 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9750 /* lwax -> lwa. */
9751 insn = (58 << 26) | 2;
9752 else
9753 abort ();
9754 insn |= rtra;
9755 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9756 /* Was PPC64_TLS which sits on insn boundary, now
9757 PPC64_TPREL16_LO which is at insn+2. */
9758 rel->r_offset += 2;
9759 r_type = R_PPC64_TPREL16_LO;
9760 if (toc_symndx != 0)
9761 {
9762 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9763 /* We changed the symbol. Start over in order to
9764 get h, sym, sec etc. right. */
9765 rel--;
9766 continue;
9767 }
9768 else
9769 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9770 }
9771 break;
9772
9773 case R_PPC64_GOT_TLSGD16_HI:
9774 case R_PPC64_GOT_TLSGD16_HA:
9775 tls_gd = TLS_TPRELGD;
9776 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9777 goto tls_gdld_hi;
9778 break;
9779
9780 case R_PPC64_GOT_TLSLD16_HI:
9781 case R_PPC64_GOT_TLSLD16_HA:
9782 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9783 {
9784 tls_gdld_hi:
9785 if ((tls_mask & tls_gd) != 0)
9786 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9787 + R_PPC64_GOT_TPREL16_DS);
9788 else
9789 {
9790 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9791 rel->r_offset -= 2;
9792 r_type = R_PPC64_NONE;
9793 }
9794 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9795 }
9796 break;
9797
9798 case R_PPC64_GOT_TLSGD16:
9799 case R_PPC64_GOT_TLSGD16_LO:
9800 tls_gd = TLS_TPRELGD;
9801 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9802 goto tls_get_addr_check;
9803 break;
9804
9805 case R_PPC64_GOT_TLSLD16:
9806 case R_PPC64_GOT_TLSLD16_LO:
9807 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9808 {
9809 tls_get_addr_check:
9810 if (rel + 1 < relend)
9811 {
9812 enum elf_ppc64_reloc_type r_type2;
9813 unsigned long r_symndx2;
9814 struct elf_link_hash_entry *h2;
9815 bfd_vma insn1, insn2, insn3;
9816 bfd_vma offset;
9817
9818 /* The next instruction should be a call to
9819 __tls_get_addr. Peek at the reloc to be sure. */
9820 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9821 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9822 if (r_symndx2 < symtab_hdr->sh_info
9823 || (r_type2 != R_PPC64_REL14
9824 && r_type2 != R_PPC64_REL14_BRTAKEN
9825 && r_type2 != R_PPC64_REL14_BRNTAKEN
9826 && r_type2 != R_PPC64_REL24))
9827 break;
9828
9829 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9830 while (h2->root.type == bfd_link_hash_indirect
9831 || h2->root.type == bfd_link_hash_warning)
9832 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9833 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9834 && h2 != &htab->tls_get_addr_fd->elf))
9835 break;
9836
9837 /* OK, it checks out. Replace the call. */
9838 offset = rel[1].r_offset;
9839 insn1 = bfd_get_32 (output_bfd,
9840 contents + rel->r_offset - 2);
9841 insn3 = bfd_get_32 (output_bfd,
9842 contents + offset + 4);
9843 if ((tls_mask & tls_gd) != 0)
9844 {
9845 /* IE */
9846 insn1 &= (1 << 26) - (1 << 2);
9847 insn1 |= 58 << 26; /* ld */
9848 insn2 = 0x7c636a14; /* add 3,3,13 */
9849 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9850 if ((tls_mask & TLS_EXPLICIT) == 0)
9851 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9852 + R_PPC64_GOT_TPREL16_DS);
9853 else
9854 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9855 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9856 }
9857 else
9858 {
9859 /* LE */
9860 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9861 insn2 = 0x38630000; /* addi 3,3,0 */
9862 if (tls_gd == 0)
9863 {
9864 /* Was an LD reloc. */
9865 r_symndx = 0;
9866 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9867 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9868 }
9869 else if (toc_symndx != 0)
9870 r_symndx = toc_symndx;
9871 r_type = R_PPC64_TPREL16_HA;
9872 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9873 rel[1].r_info = ELF64_R_INFO (r_symndx,
9874 R_PPC64_TPREL16_LO);
9875 rel[1].r_offset += 2;
9876 }
9877 if (insn3 == NOP
9878 || insn3 == CROR_151515 || insn3 == CROR_313131)
9879 {
9880 insn3 = insn2;
9881 insn2 = NOP;
9882 rel[1].r_offset += 4;
9883 }
9884 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9885 bfd_put_32 (output_bfd, insn2, contents + offset);
9886 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9887 if (tls_gd == 0 || toc_symndx != 0)
9888 {
9889 /* We changed the symbol. Start over in order
9890 to get h, sym, sec etc. right. */
9891 rel--;
9892 continue;
9893 }
9894 }
9895 }
9896 break;
9897
9898 case R_PPC64_DTPMOD64:
9899 if (rel + 1 < relend
9900 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9901 && rel[1].r_offset == rel->r_offset + 8)
9902 {
9903 if ((tls_mask & TLS_GD) == 0)
9904 {
9905 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9906 if ((tls_mask & TLS_TPRELGD) != 0)
9907 r_type = R_PPC64_TPREL64;
9908 else
9909 {
9910 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9911 r_type = R_PPC64_NONE;
9912 }
9913 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9914 }
9915 }
9916 else
9917 {
9918 if ((tls_mask & TLS_LD) == 0)
9919 {
9920 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9921 r_type = R_PPC64_NONE;
9922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9923 }
9924 }
9925 break;
9926
9927 case R_PPC64_TPREL64:
9928 if ((tls_mask & TLS_TPREL) == 0)
9929 {
9930 r_type = R_PPC64_NONE;
9931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9932 }
9933 break;
9934 }
9935
9936 /* Handle other relocations that tweak non-addend part of insn. */
9937 insn = 0;
9938 max_br_offset = 1 << 25;
9939 addend = rel->r_addend;
9940 switch (r_type)
9941 {
9942 default:
9943 break;
9944
9945 /* Branch taken prediction relocations. */
9946 case R_PPC64_ADDR14_BRTAKEN:
9947 case R_PPC64_REL14_BRTAKEN:
9948 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9949 /* Fall thru. */
9950
9951 /* Branch not taken prediction relocations. */
9952 case R_PPC64_ADDR14_BRNTAKEN:
9953 case R_PPC64_REL14_BRNTAKEN:
9954 insn |= bfd_get_32 (output_bfd,
9955 contents + rel->r_offset) & ~(0x01 << 21);
9956 /* Fall thru. */
9957
9958 case R_PPC64_REL14:
9959 max_br_offset = 1 << 15;
9960 /* Fall thru. */
9961
9962 case R_PPC64_REL24:
9963 /* Calls to functions with a different TOC, such as calls to
9964 shared objects, need to alter the TOC pointer. This is
9965 done using a linkage stub. A REL24 branching to these
9966 linkage stubs needs to be followed by a nop, as the nop
9967 will be replaced with an instruction to restore the TOC
9968 base pointer. */
9969 stub_entry = NULL;
9970 fdh = h;
9971 if (((h != NULL
9972 && (((fdh = h->oh) != NULL
9973 && fdh->elf.plt.plist != NULL)
9974 || (fdh = h)->elf.plt.plist != NULL))
9975 || (sec != NULL
9976 && sec->output_section != NULL
9977 && sec->id <= htab->top_id
9978 && (htab->stub_group[sec->id].toc_off
9979 != htab->stub_group[input_section->id].toc_off)))
9980 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9981 rel, htab)) != NULL
9982 && (stub_entry->stub_type == ppc_stub_plt_call
9983 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9984 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9985 {
9986 bfd_boolean can_plt_call = FALSE;
9987
9988 if (rel->r_offset + 8 <= input_section->size)
9989 {
9990 unsigned long nop;
9991 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9992 if (nop == NOP
9993 || nop == CROR_151515 || nop == CROR_313131)
9994 {
9995 bfd_put_32 (input_bfd, LD_R2_40R1,
9996 contents + rel->r_offset + 4);
9997 can_plt_call = TRUE;
9998 }
9999 }
10000
10001 if (!can_plt_call)
10002 {
10003 if (stub_entry->stub_type == ppc_stub_plt_call)
10004 {
10005 /* If this is a plain branch rather than a branch
10006 and link, don't require a nop. */
10007 unsigned long br;
10008 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10009 if ((br & 1) == 0)
10010 can_plt_call = TRUE;
10011 }
10012 else if (h != NULL
10013 && strcmp (h->elf.root.root.string,
10014 ".__libc_start_main") == 0)
10015 {
10016 /* Allow crt1 branch to go via a toc adjusting stub. */
10017 can_plt_call = TRUE;
10018 }
10019 else
10020 {
10021 if (strcmp (input_section->output_section->name,
10022 ".init") == 0
10023 || strcmp (input_section->output_section->name,
10024 ".fini") == 0)
10025 (*_bfd_error_handler)
10026 (_("%B(%A+0x%lx): automatic multiple TOCs "
10027 "not supported using your crt files; "
10028 "recompile with -mminimal-toc or upgrade gcc"),
10029 input_bfd,
10030 input_section,
10031 (long) rel->r_offset);
10032 else
10033 (*_bfd_error_handler)
10034 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10035 "does not allow automatic multiple TOCs; "
10036 "recompile with -mminimal-toc or "
10037 "-fno-optimize-sibling-calls, "
10038 "or make `%s' extern"),
10039 input_bfd,
10040 input_section,
10041 (long) rel->r_offset,
10042 sym_name,
10043 sym_name);
10044 bfd_set_error (bfd_error_bad_value);
10045 ret = FALSE;
10046 }
10047 }
10048
10049 if (can_plt_call
10050 && stub_entry->stub_type == ppc_stub_plt_call)
10051 unresolved_reloc = FALSE;
10052 }
10053
10054 if (stub_entry == NULL
10055 && get_opd_info (sec) != NULL)
10056 {
10057 /* The branch destination is the value of the opd entry. */
10058 bfd_vma off = (relocation - sec->output_section->vma
10059 - sec->output_offset + rel->r_addend);
10060 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10061 if (dest != (bfd_vma) -1)
10062 {
10063 relocation = dest;
10064 addend = 0;
10065 }
10066 }
10067
10068 /* If the branch is out of reach we ought to have a long
10069 branch stub. */
10070 from = (rel->r_offset
10071 + input_section->output_offset
10072 + input_section->output_section->vma);
10073
10074 if (stub_entry == NULL
10075 && (relocation + rel->r_addend - from + max_br_offset
10076 >= 2 * max_br_offset)
10077 && r_type != R_PPC64_ADDR14_BRTAKEN
10078 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10079 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10080 htab);
10081
10082 if (stub_entry != NULL)
10083 {
10084 /* Munge up the value and addend so that we call the stub
10085 rather than the procedure directly. */
10086 relocation = (stub_entry->stub_offset
10087 + stub_entry->stub_sec->output_offset
10088 + stub_entry->stub_sec->output_section->vma);
10089 addend = 0;
10090 }
10091
10092 if (insn != 0)
10093 {
10094 if (is_power4)
10095 {
10096 /* Set 'a' bit. This is 0b00010 in BO field for branch
10097 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10098 for branch on CTR insns (BO == 1a00t or 1a01t). */
10099 if ((insn & (0x14 << 21)) == (0x04 << 21))
10100 insn |= 0x02 << 21;
10101 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10102 insn |= 0x08 << 21;
10103 else
10104 break;
10105 }
10106 else
10107 {
10108 /* Invert 'y' bit if not the default. */
10109 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10110 insn ^= 0x01 << 21;
10111 }
10112
10113 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10114 }
10115
10116 /* NOP out calls to undefined weak functions.
10117 We can thus call a weak function without first
10118 checking whether the function is defined. */
10119 else if (h != NULL
10120 && h->elf.root.type == bfd_link_hash_undefweak
10121 && r_type == R_PPC64_REL24
10122 && relocation == 0
10123 && rel->r_addend == 0)
10124 {
10125 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10126 continue;
10127 }
10128 break;
10129 }
10130
10131 /* Set `addend'. */
10132 tls_type = 0;
10133 switch (r_type)
10134 {
10135 default:
10136 (*_bfd_error_handler)
10137 (_("%B: unknown relocation type %d for symbol %s"),
10138 input_bfd, (int) r_type, sym_name);
10139
10140 bfd_set_error (bfd_error_bad_value);
10141 ret = FALSE;
10142 continue;
10143
10144 case R_PPC64_NONE:
10145 case R_PPC64_TLS:
10146 case R_PPC64_GNU_VTINHERIT:
10147 case R_PPC64_GNU_VTENTRY:
10148 continue;
10149
10150 /* GOT16 relocations. Like an ADDR16 using the symbol's
10151 address in the GOT as relocation value instead of the
10152 symbol's value itself. Also, create a GOT entry for the
10153 symbol and put the symbol value there. */
10154 case R_PPC64_GOT_TLSGD16:
10155 case R_PPC64_GOT_TLSGD16_LO:
10156 case R_PPC64_GOT_TLSGD16_HI:
10157 case R_PPC64_GOT_TLSGD16_HA:
10158 tls_type = TLS_TLS | TLS_GD;
10159 goto dogot;
10160
10161 case R_PPC64_GOT_TLSLD16:
10162 case R_PPC64_GOT_TLSLD16_LO:
10163 case R_PPC64_GOT_TLSLD16_HI:
10164 case R_PPC64_GOT_TLSLD16_HA:
10165 tls_type = TLS_TLS | TLS_LD;
10166 goto dogot;
10167
10168 case R_PPC64_GOT_TPREL16_DS:
10169 case R_PPC64_GOT_TPREL16_LO_DS:
10170 case R_PPC64_GOT_TPREL16_HI:
10171 case R_PPC64_GOT_TPREL16_HA:
10172 tls_type = TLS_TLS | TLS_TPREL;
10173 goto dogot;
10174
10175 case R_PPC64_GOT_DTPREL16_DS:
10176 case R_PPC64_GOT_DTPREL16_LO_DS:
10177 case R_PPC64_GOT_DTPREL16_HI:
10178 case R_PPC64_GOT_DTPREL16_HA:
10179 tls_type = TLS_TLS | TLS_DTPREL;
10180 goto dogot;
10181
10182 case R_PPC64_GOT16:
10183 case R_PPC64_GOT16_LO:
10184 case R_PPC64_GOT16_HI:
10185 case R_PPC64_GOT16_HA:
10186 case R_PPC64_GOT16_DS:
10187 case R_PPC64_GOT16_LO_DS:
10188 dogot:
10189 {
10190 /* Relocation is to the entry for this symbol in the global
10191 offset table. */
10192 asection *got;
10193 bfd_vma *offp;
10194 bfd_vma off;
10195 unsigned long indx = 0;
10196
10197 if (tls_type == (TLS_TLS | TLS_LD)
10198 && (h == NULL
10199 || !h->elf.def_dynamic))
10200 offp = &ppc64_tlsld_got (input_bfd)->offset;
10201 else
10202 {
10203 struct got_entry *ent;
10204
10205 if (h != NULL)
10206 {
10207 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10208 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10209 &h->elf)
10210 || (info->shared
10211 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10212 /* This is actually a static link, or it is a
10213 -Bsymbolic link and the symbol is defined
10214 locally, or the symbol was forced to be local
10215 because of a version file. */
10216 ;
10217 else
10218 {
10219 indx = h->elf.dynindx;
10220 unresolved_reloc = FALSE;
10221 }
10222 ent = h->elf.got.glist;
10223 }
10224 else
10225 {
10226 if (local_got_ents == NULL)
10227 abort ();
10228 ent = local_got_ents[r_symndx];
10229 }
10230
10231 for (; ent != NULL; ent = ent->next)
10232 if (ent->addend == rel->r_addend
10233 && ent->owner == input_bfd
10234 && ent->tls_type == tls_type)
10235 break;
10236 if (ent == NULL)
10237 abort ();
10238 offp = &ent->got.offset;
10239 }
10240
10241 got = ppc64_elf_tdata (input_bfd)->got;
10242 if (got == NULL)
10243 abort ();
10244
10245 /* The offset must always be a multiple of 8. We use the
10246 least significant bit to record whether we have already
10247 processed this entry. */
10248 off = *offp;
10249 if ((off & 1) != 0)
10250 off &= ~1;
10251 else
10252 {
10253 /* Generate relocs for the dynamic linker, except in
10254 the case of TLSLD where we'll use one entry per
10255 module. */
10256 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10257
10258 *offp = off | 1;
10259 if ((info->shared || indx != 0)
10260 && (h == NULL
10261 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10262 || h->elf.root.type != bfd_link_hash_undefweak))
10263 {
10264 outrel.r_offset = (got->output_section->vma
10265 + got->output_offset
10266 + off);
10267 outrel.r_addend = rel->r_addend;
10268 if (tls_type & (TLS_LD | TLS_GD))
10269 {
10270 outrel.r_addend = 0;
10271 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10272 if (tls_type == (TLS_TLS | TLS_GD))
10273 {
10274 loc = relgot->contents;
10275 loc += (relgot->reloc_count++
10276 * sizeof (Elf64_External_Rela));
10277 bfd_elf64_swap_reloca_out (output_bfd,
10278 &outrel, loc);
10279 outrel.r_offset += 8;
10280 outrel.r_addend = rel->r_addend;
10281 outrel.r_info
10282 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10283 }
10284 }
10285 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10286 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10287 else if (tls_type == (TLS_TLS | TLS_TPREL))
10288 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10289 else if (indx == 0)
10290 {
10291 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10292
10293 /* Write the .got section contents for the sake
10294 of prelink. */
10295 loc = got->contents + off;
10296 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10297 loc);
10298 }
10299 else
10300 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10301
10302 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10303 {
10304 outrel.r_addend += relocation;
10305 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10306 outrel.r_addend -= htab->elf.tls_sec->vma;
10307 }
10308 loc = relgot->contents;
10309 loc += (relgot->reloc_count++
10310 * sizeof (Elf64_External_Rela));
10311 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10312 }
10313
10314 /* Init the .got section contents here if we're not
10315 emitting a reloc. */
10316 else
10317 {
10318 relocation += rel->r_addend;
10319 if (tls_type == (TLS_TLS | TLS_LD))
10320 relocation = 1;
10321 else if (tls_type != 0)
10322 {
10323 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10324 if (tls_type == (TLS_TLS | TLS_TPREL))
10325 relocation += DTP_OFFSET - TP_OFFSET;
10326
10327 if (tls_type == (TLS_TLS | TLS_GD))
10328 {
10329 bfd_put_64 (output_bfd, relocation,
10330 got->contents + off + 8);
10331 relocation = 1;
10332 }
10333 }
10334
10335 bfd_put_64 (output_bfd, relocation,
10336 got->contents + off);
10337 }
10338 }
10339
10340 if (off >= (bfd_vma) -2)
10341 abort ();
10342
10343 relocation = got->output_offset + off;
10344
10345 /* TOC base (r2) is TOC start plus 0x8000. */
10346 addend = -TOC_BASE_OFF;
10347 }
10348 break;
10349
10350 case R_PPC64_PLT16_HA:
10351 case R_PPC64_PLT16_HI:
10352 case R_PPC64_PLT16_LO:
10353 case R_PPC64_PLT32:
10354 case R_PPC64_PLT64:
10355 /* Relocation is to the entry for this symbol in the
10356 procedure linkage table. */
10357
10358 /* Resolve a PLT reloc against a local symbol directly,
10359 without using the procedure linkage table. */
10360 if (h == NULL)
10361 break;
10362
10363 /* It's possible that we didn't make a PLT entry for this
10364 symbol. This happens when statically linking PIC code,
10365 or when using -Bsymbolic. Go find a match if there is a
10366 PLT entry. */
10367 if (htab->plt != NULL)
10368 {
10369 struct plt_entry *ent;
10370 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10371 if (ent->addend == rel->r_addend
10372 && ent->plt.offset != (bfd_vma) -1)
10373 {
10374 relocation = (htab->plt->output_section->vma
10375 + htab->plt->output_offset
10376 + ent->plt.offset);
10377 unresolved_reloc = FALSE;
10378 }
10379 }
10380 break;
10381
10382 case R_PPC64_TOC:
10383 /* Relocation value is TOC base. */
10384 relocation = TOCstart;
10385 if (r_symndx == 0)
10386 relocation += htab->stub_group[input_section->id].toc_off;
10387 else if (unresolved_reloc)
10388 ;
10389 else if (sec != NULL && sec->id <= htab->top_id)
10390 relocation += htab->stub_group[sec->id].toc_off;
10391 else
10392 unresolved_reloc = TRUE;
10393 goto dodyn2;
10394
10395 /* TOC16 relocs. We want the offset relative to the TOC base,
10396 which is the address of the start of the TOC plus 0x8000.
10397 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10398 in this order. */
10399 case R_PPC64_TOC16:
10400 case R_PPC64_TOC16_LO:
10401 case R_PPC64_TOC16_HI:
10402 case R_PPC64_TOC16_DS:
10403 case R_PPC64_TOC16_LO_DS:
10404 case R_PPC64_TOC16_HA:
10405 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10406 break;
10407
10408 /* Relocate against the beginning of the section. */
10409 case R_PPC64_SECTOFF:
10410 case R_PPC64_SECTOFF_LO:
10411 case R_PPC64_SECTOFF_HI:
10412 case R_PPC64_SECTOFF_DS:
10413 case R_PPC64_SECTOFF_LO_DS:
10414 case R_PPC64_SECTOFF_HA:
10415 if (sec != NULL)
10416 addend -= sec->output_section->vma;
10417 break;
10418
10419 case R_PPC64_REL14:
10420 case R_PPC64_REL14_BRNTAKEN:
10421 case R_PPC64_REL14_BRTAKEN:
10422 case R_PPC64_REL24:
10423 break;
10424
10425 case R_PPC64_TPREL16:
10426 case R_PPC64_TPREL16_LO:
10427 case R_PPC64_TPREL16_HI:
10428 case R_PPC64_TPREL16_HA:
10429 case R_PPC64_TPREL16_DS:
10430 case R_PPC64_TPREL16_LO_DS:
10431 case R_PPC64_TPREL16_HIGHER:
10432 case R_PPC64_TPREL16_HIGHERA:
10433 case R_PPC64_TPREL16_HIGHEST:
10434 case R_PPC64_TPREL16_HIGHESTA:
10435 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10436 if (info->shared)
10437 /* The TPREL16 relocs shouldn't really be used in shared
10438 libs as they will result in DT_TEXTREL being set, but
10439 support them anyway. */
10440 goto dodyn;
10441 break;
10442
10443 case R_PPC64_DTPREL16:
10444 case R_PPC64_DTPREL16_LO:
10445 case R_PPC64_DTPREL16_HI:
10446 case R_PPC64_DTPREL16_HA:
10447 case R_PPC64_DTPREL16_DS:
10448 case R_PPC64_DTPREL16_LO_DS:
10449 case R_PPC64_DTPREL16_HIGHER:
10450 case R_PPC64_DTPREL16_HIGHERA:
10451 case R_PPC64_DTPREL16_HIGHEST:
10452 case R_PPC64_DTPREL16_HIGHESTA:
10453 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10454 break;
10455
10456 case R_PPC64_DTPMOD64:
10457 relocation = 1;
10458 addend = 0;
10459 goto dodyn;
10460
10461 case R_PPC64_TPREL64:
10462 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10463 goto dodyn;
10464
10465 case R_PPC64_DTPREL64:
10466 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10467 /* Fall thru */
10468
10469 /* Relocations that may need to be propagated if this is a
10470 dynamic object. */
10471 case R_PPC64_REL30:
10472 case R_PPC64_REL32:
10473 case R_PPC64_REL64:
10474 case R_PPC64_ADDR14:
10475 case R_PPC64_ADDR14_BRNTAKEN:
10476 case R_PPC64_ADDR14_BRTAKEN:
10477 case R_PPC64_ADDR16:
10478 case R_PPC64_ADDR16_DS:
10479 case R_PPC64_ADDR16_HA:
10480 case R_PPC64_ADDR16_HI:
10481 case R_PPC64_ADDR16_HIGHER:
10482 case R_PPC64_ADDR16_HIGHERA:
10483 case R_PPC64_ADDR16_HIGHEST:
10484 case R_PPC64_ADDR16_HIGHESTA:
10485 case R_PPC64_ADDR16_LO:
10486 case R_PPC64_ADDR16_LO_DS:
10487 case R_PPC64_ADDR24:
10488 case R_PPC64_ADDR32:
10489 case R_PPC64_ADDR64:
10490 case R_PPC64_UADDR16:
10491 case R_PPC64_UADDR32:
10492 case R_PPC64_UADDR64:
10493 /* r_symndx will be zero only for relocs against symbols
10494 from removed linkonce sections, or sections discarded by
10495 a linker script. */
10496 dodyn:
10497 if (r_symndx == 0)
10498 break;
10499 /* Fall thru. */
10500
10501 dodyn2:
10502 if ((input_section->flags & SEC_ALLOC) == 0)
10503 break;
10504
10505 if (NO_OPD_RELOCS && is_opd)
10506 break;
10507
10508 if ((info->shared
10509 && (h == NULL
10510 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10511 || h->elf.root.type != bfd_link_hash_undefweak)
10512 && (MUST_BE_DYN_RELOC (r_type)
10513 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10514 || (ELIMINATE_COPY_RELOCS
10515 && !info->shared
10516 && h != NULL
10517 && h->elf.dynindx != -1
10518 && !h->elf.non_got_ref
10519 && h->elf.def_dynamic
10520 && !h->elf.def_regular))
10521 {
10522 Elf_Internal_Rela outrel;
10523 bfd_boolean skip, relocate;
10524 asection *sreloc;
10525 bfd_byte *loc;
10526 bfd_vma out_off;
10527
10528 /* When generating a dynamic object, these relocations
10529 are copied into the output file to be resolved at run
10530 time. */
10531
10532 skip = FALSE;
10533 relocate = FALSE;
10534
10535 out_off = _bfd_elf_section_offset (output_bfd, info,
10536 input_section, rel->r_offset);
10537 if (out_off == (bfd_vma) -1)
10538 skip = TRUE;
10539 else if (out_off == (bfd_vma) -2)
10540 skip = TRUE, relocate = TRUE;
10541 out_off += (input_section->output_section->vma
10542 + input_section->output_offset);
10543 outrel.r_offset = out_off;
10544 outrel.r_addend = rel->r_addend;
10545
10546 /* Optimize unaligned reloc use. */
10547 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10548 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10549 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10550 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10551 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10552 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10553 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10554 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10555 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10556
10557 if (skip)
10558 memset (&outrel, 0, sizeof outrel);
10559 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10560 && !is_opd
10561 && r_type != R_PPC64_TOC)
10562 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10563 else
10564 {
10565 /* This symbol is local, or marked to become local,
10566 or this is an opd section reloc which must point
10567 at a local function. */
10568 outrel.r_addend += relocation;
10569 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10570 {
10571 if (is_opd && h != NULL)
10572 {
10573 /* Lie about opd entries. This case occurs
10574 when building shared libraries and we
10575 reference a function in another shared
10576 lib. The same thing happens for a weak
10577 definition in an application that's
10578 overridden by a strong definition in a
10579 shared lib. (I believe this is a generic
10580 bug in binutils handling of weak syms.)
10581 In these cases we won't use the opd
10582 entry in this lib. */
10583 unresolved_reloc = FALSE;
10584 }
10585 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10586
10587 /* We need to relocate .opd contents for ld.so.
10588 Prelink also wants simple and consistent rules
10589 for relocs. This make all RELATIVE relocs have
10590 *r_offset equal to r_addend. */
10591 relocate = TRUE;
10592 }
10593 else
10594 {
10595 long indx = 0;
10596
10597 if (bfd_is_abs_section (sec))
10598 ;
10599 else if (sec == NULL || sec->owner == NULL)
10600 {
10601 bfd_set_error (bfd_error_bad_value);
10602 return FALSE;
10603 }
10604 else
10605 {
10606 asection *osec;
10607
10608 osec = sec->output_section;
10609 indx = elf_section_data (osec)->dynindx;
10610
10611 /* We are turning this relocation into one
10612 against a section symbol, so subtract out
10613 the output section's address but not the
10614 offset of the input section in the output
10615 section. */
10616 outrel.r_addend -= osec->vma;
10617 }
10618
10619 outrel.r_info = ELF64_R_INFO (indx, r_type);
10620 }
10621 }
10622
10623 sreloc = elf_section_data (input_section)->sreloc;
10624 if (sreloc == NULL)
10625 abort ();
10626
10627 loc = sreloc->contents;
10628 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10629 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10630
10631 /* If this reloc is against an external symbol, it will
10632 be computed at runtime, so there's no need to do
10633 anything now. However, for the sake of prelink ensure
10634 that the section contents are a known value. */
10635 if (! relocate)
10636 {
10637 unresolved_reloc = FALSE;
10638 /* The value chosen here is quite arbitrary as ld.so
10639 ignores section contents except for the special
10640 case of .opd where the contents might be accessed
10641 before relocation. Choose zero, as that won't
10642 cause reloc overflow. */
10643 relocation = 0;
10644 addend = 0;
10645 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10646 to improve backward compatibility with older
10647 versions of ld. */
10648 if (r_type == R_PPC64_ADDR64)
10649 addend = outrel.r_addend;
10650 /* Adjust pc_relative relocs to have zero in *r_offset. */
10651 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10652 addend = (input_section->output_section->vma
10653 + input_section->output_offset
10654 + rel->r_offset);
10655 }
10656 }
10657 break;
10658
10659 case R_PPC64_COPY:
10660 case R_PPC64_GLOB_DAT:
10661 case R_PPC64_JMP_SLOT:
10662 case R_PPC64_RELATIVE:
10663 /* We shouldn't ever see these dynamic relocs in relocatable
10664 files. */
10665 /* Fall through. */
10666
10667 case R_PPC64_PLTGOT16:
10668 case R_PPC64_PLTGOT16_DS:
10669 case R_PPC64_PLTGOT16_HA:
10670 case R_PPC64_PLTGOT16_HI:
10671 case R_PPC64_PLTGOT16_LO:
10672 case R_PPC64_PLTGOT16_LO_DS:
10673 case R_PPC64_PLTREL32:
10674 case R_PPC64_PLTREL64:
10675 /* These ones haven't been implemented yet. */
10676
10677 (*_bfd_error_handler)
10678 (_("%B: relocation %s is not supported for symbol %s."),
10679 input_bfd,
10680 ppc64_elf_howto_table[r_type]->name, sym_name);
10681
10682 bfd_set_error (bfd_error_invalid_operation);
10683 ret = FALSE;
10684 continue;
10685 }
10686
10687 /* Do any further special processing. */
10688 switch (r_type)
10689 {
10690 default:
10691 break;
10692
10693 case R_PPC64_ADDR16_HA:
10694 case R_PPC64_ADDR16_HIGHERA:
10695 case R_PPC64_ADDR16_HIGHESTA:
10696 case R_PPC64_GOT16_HA:
10697 case R_PPC64_PLTGOT16_HA:
10698 case R_PPC64_PLT16_HA:
10699 case R_PPC64_TOC16_HA:
10700 case R_PPC64_SECTOFF_HA:
10701 case R_PPC64_TPREL16_HA:
10702 case R_PPC64_DTPREL16_HA:
10703 case R_PPC64_GOT_TLSGD16_HA:
10704 case R_PPC64_GOT_TLSLD16_HA:
10705 case R_PPC64_GOT_TPREL16_HA:
10706 case R_PPC64_GOT_DTPREL16_HA:
10707 case R_PPC64_TPREL16_HIGHER:
10708 case R_PPC64_TPREL16_HIGHERA:
10709 case R_PPC64_TPREL16_HIGHEST:
10710 case R_PPC64_TPREL16_HIGHESTA:
10711 case R_PPC64_DTPREL16_HIGHER:
10712 case R_PPC64_DTPREL16_HIGHERA:
10713 case R_PPC64_DTPREL16_HIGHEST:
10714 case R_PPC64_DTPREL16_HIGHESTA:
10715 /* It's just possible that this symbol is a weak symbol
10716 that's not actually defined anywhere. In that case,
10717 'sec' would be NULL, and we should leave the symbol
10718 alone (it will be set to zero elsewhere in the link). */
10719 if (sec != NULL)
10720 /* Add 0x10000 if sign bit in 0:15 is set.
10721 Bits 0:15 are not used. */
10722 addend += 0x8000;
10723 break;
10724
10725 case R_PPC64_ADDR16_DS:
10726 case R_PPC64_ADDR16_LO_DS:
10727 case R_PPC64_GOT16_DS:
10728 case R_PPC64_GOT16_LO_DS:
10729 case R_PPC64_PLT16_LO_DS:
10730 case R_PPC64_SECTOFF_DS:
10731 case R_PPC64_SECTOFF_LO_DS:
10732 case R_PPC64_TOC16_DS:
10733 case R_PPC64_TOC16_LO_DS:
10734 case R_PPC64_PLTGOT16_DS:
10735 case R_PPC64_PLTGOT16_LO_DS:
10736 case R_PPC64_GOT_TPREL16_DS:
10737 case R_PPC64_GOT_TPREL16_LO_DS:
10738 case R_PPC64_GOT_DTPREL16_DS:
10739 case R_PPC64_GOT_DTPREL16_LO_DS:
10740 case R_PPC64_TPREL16_DS:
10741 case R_PPC64_TPREL16_LO_DS:
10742 case R_PPC64_DTPREL16_DS:
10743 case R_PPC64_DTPREL16_LO_DS:
10744 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10745 mask = 3;
10746 /* If this reloc is against an lq insn, then the value must be
10747 a multiple of 16. This is somewhat of a hack, but the
10748 "correct" way to do this by defining _DQ forms of all the
10749 _DS relocs bloats all reloc switches in this file. It
10750 doesn't seem to make much sense to use any of these relocs
10751 in data, so testing the insn should be safe. */
10752 if ((insn & (0x3f << 26)) == (56u << 26))
10753 mask = 15;
10754 if (((relocation + addend) & mask) != 0)
10755 {
10756 (*_bfd_error_handler)
10757 (_("%B: error: relocation %s not a multiple of %d"),
10758 input_bfd,
10759 ppc64_elf_howto_table[r_type]->name,
10760 mask + 1);
10761 bfd_set_error (bfd_error_bad_value);
10762 ret = FALSE;
10763 continue;
10764 }
10765 break;
10766 }
10767
10768 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10769 because such sections are not SEC_ALLOC and thus ld.so will
10770 not process them. */
10771 if (unresolved_reloc
10772 && !((input_section->flags & SEC_DEBUGGING) != 0
10773 && h->elf.def_dynamic))
10774 {
10775 (*_bfd_error_handler)
10776 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10777 input_bfd,
10778 input_section,
10779 (long) rel->r_offset,
10780 ppc64_elf_howto_table[(int) r_type]->name,
10781 h->elf.root.root.string);
10782 ret = FALSE;
10783 }
10784
10785 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10786 input_bfd,
10787 input_section,
10788 contents,
10789 rel->r_offset,
10790 relocation,
10791 addend);
10792
10793 if (r != bfd_reloc_ok)
10794 {
10795 if (sym_name == NULL)
10796 sym_name = "(null)";
10797 if (r == bfd_reloc_overflow)
10798 {
10799 if (warned)
10800 continue;
10801 if (h != NULL
10802 && h->elf.root.type == bfd_link_hash_undefweak
10803 && ppc64_elf_howto_table[r_type]->pc_relative)
10804 {
10805 /* Assume this is a call protected by other code that
10806 detects the symbol is undefined. If this is the case,
10807 we can safely ignore the overflow. If not, the
10808 program is hosed anyway, and a little warning isn't
10809 going to help. */
10810
10811 continue;
10812 }
10813
10814 if (!((*info->callbacks->reloc_overflow)
10815 (info, (h ? &h->elf.root : NULL), sym_name,
10816 ppc64_elf_howto_table[r_type]->name,
10817 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10818 return FALSE;
10819 }
10820 else
10821 {
10822 (*_bfd_error_handler)
10823 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10824 input_bfd,
10825 input_section,
10826 (long) rel->r_offset,
10827 ppc64_elf_howto_table[r_type]->name,
10828 sym_name,
10829 (int) r);
10830 ret = FALSE;
10831 }
10832 }
10833 }
10834
10835 /* If we're emitting relocations, then shortly after this function
10836 returns, reloc offsets and addends for this section will be
10837 adjusted. Worse, reloc symbol indices will be for the output
10838 file rather than the input. Save a copy of the relocs for
10839 opd_entry_value. */
10840 if (is_opd && info->emitrelocations)
10841 {
10842 bfd_size_type amt;
10843 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10844 rel = bfd_alloc (input_bfd, amt);
10845 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10846 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10847 if (rel == NULL)
10848 return FALSE;
10849 memcpy (rel, relocs, amt);
10850 }
10851 return ret;
10852 }
10853
10854 /* Adjust the value of any local symbols in opd sections. */
10855
10856 static bfd_boolean
10857 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10858 const char *name ATTRIBUTE_UNUSED,
10859 Elf_Internal_Sym *elfsym,
10860 asection *input_sec,
10861 struct elf_link_hash_entry *h)
10862 {
10863 long *opd_adjust, adjust;
10864 bfd_vma value;
10865
10866 if (h != NULL)
10867 return TRUE;
10868
10869 opd_adjust = get_opd_info (input_sec);
10870 if (opd_adjust == NULL)
10871 return TRUE;
10872
10873 value = elfsym->st_value - input_sec->output_offset;
10874 if (!info->relocatable)
10875 value -= input_sec->output_section->vma;
10876
10877 adjust = opd_adjust[value / 8];
10878 if (adjust == -1)
10879 elfsym->st_value = 0;
10880 else
10881 elfsym->st_value += adjust;
10882 return TRUE;
10883 }
10884
10885 /* Finish up dynamic symbol handling. We set the contents of various
10886 dynamic sections here. */
10887
10888 static bfd_boolean
10889 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10890 struct bfd_link_info *info,
10891 struct elf_link_hash_entry *h,
10892 Elf_Internal_Sym *sym)
10893 {
10894 struct ppc_link_hash_table *htab;
10895 bfd *dynobj;
10896 struct plt_entry *ent;
10897 Elf_Internal_Rela rela;
10898 bfd_byte *loc;
10899
10900 htab = ppc_hash_table (info);
10901 dynobj = htab->elf.dynobj;
10902
10903 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10904 if (ent->plt.offset != (bfd_vma) -1)
10905 {
10906 /* This symbol has an entry in the procedure linkage
10907 table. Set it up. */
10908
10909 if (htab->plt == NULL
10910 || htab->relplt == NULL
10911 || htab->glink == NULL)
10912 abort ();
10913
10914 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10915 fill in the PLT entry. */
10916 rela.r_offset = (htab->plt->output_section->vma
10917 + htab->plt->output_offset
10918 + ent->plt.offset);
10919 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10920 rela.r_addend = ent->addend;
10921
10922 loc = htab->relplt->contents;
10923 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10924 * sizeof (Elf64_External_Rela));
10925 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10926 }
10927
10928 if (h->needs_copy)
10929 {
10930 Elf_Internal_Rela rela;
10931 bfd_byte *loc;
10932
10933 /* This symbol needs a copy reloc. Set it up. */
10934
10935 if (h->dynindx == -1
10936 || (h->root.type != bfd_link_hash_defined
10937 && h->root.type != bfd_link_hash_defweak)
10938 || htab->relbss == NULL)
10939 abort ();
10940
10941 rela.r_offset = (h->root.u.def.value
10942 + h->root.u.def.section->output_section->vma
10943 + h->root.u.def.section->output_offset);
10944 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10945 rela.r_addend = 0;
10946 loc = htab->relbss->contents;
10947 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10948 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10949 }
10950
10951 /* Mark some specially defined symbols as absolute. */
10952 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10953 sym->st_shndx = SHN_ABS;
10954
10955 return TRUE;
10956 }
10957
10958 /* Used to decide how to sort relocs in an optimal manner for the
10959 dynamic linker, before writing them out. */
10960
10961 static enum elf_reloc_type_class
10962 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10963 {
10964 enum elf_ppc64_reloc_type r_type;
10965
10966 r_type = ELF64_R_TYPE (rela->r_info);
10967 switch (r_type)
10968 {
10969 case R_PPC64_RELATIVE:
10970 return reloc_class_relative;
10971 case R_PPC64_JMP_SLOT:
10972 return reloc_class_plt;
10973 case R_PPC64_COPY:
10974 return reloc_class_copy;
10975 default:
10976 return reloc_class_normal;
10977 }
10978 }
10979
10980 /* Finish up the dynamic sections. */
10981
10982 static bfd_boolean
10983 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10984 struct bfd_link_info *info)
10985 {
10986 struct ppc_link_hash_table *htab;
10987 bfd *dynobj;
10988 asection *sdyn;
10989
10990 htab = ppc_hash_table (info);
10991 dynobj = htab->elf.dynobj;
10992 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10993
10994 if (htab->elf.dynamic_sections_created)
10995 {
10996 Elf64_External_Dyn *dyncon, *dynconend;
10997
10998 if (sdyn == NULL || htab->got == NULL)
10999 abort ();
11000
11001 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11002 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11003 for (; dyncon < dynconend; dyncon++)
11004 {
11005 Elf_Internal_Dyn dyn;
11006 asection *s;
11007
11008 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11009
11010 switch (dyn.d_tag)
11011 {
11012 default:
11013 continue;
11014
11015 case DT_PPC64_GLINK:
11016 s = htab->glink;
11017 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11018 /* We stupidly defined DT_PPC64_GLINK to be the start
11019 of glink rather than the first entry point, which is
11020 what ld.so needs, and now have a bigger stub to
11021 support automatic multiple TOCs. */
11022 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11023 break;
11024
11025 case DT_PPC64_OPD:
11026 s = bfd_get_section_by_name (output_bfd, ".opd");
11027 if (s == NULL)
11028 continue;
11029 dyn.d_un.d_ptr = s->vma;
11030 break;
11031
11032 case DT_PPC64_OPDSZ:
11033 s = bfd_get_section_by_name (output_bfd, ".opd");
11034 if (s == NULL)
11035 continue;
11036 dyn.d_un.d_val = s->size;
11037 break;
11038
11039 case DT_PLTGOT:
11040 s = htab->plt;
11041 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11042 break;
11043
11044 case DT_JMPREL:
11045 s = htab->relplt;
11046 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11047 break;
11048
11049 case DT_PLTRELSZ:
11050 dyn.d_un.d_val = htab->relplt->size;
11051 break;
11052
11053 case DT_RELASZ:
11054 /* Don't count procedure linkage table relocs in the
11055 overall reloc count. */
11056 s = htab->relplt;
11057 if (s == NULL)
11058 continue;
11059 dyn.d_un.d_val -= s->size;
11060 break;
11061
11062 case DT_RELA:
11063 /* We may not be using the standard ELF linker script.
11064 If .rela.plt is the first .rela section, we adjust
11065 DT_RELA to not include it. */
11066 s = htab->relplt;
11067 if (s == NULL)
11068 continue;
11069 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11070 continue;
11071 dyn.d_un.d_ptr += s->size;
11072 break;
11073 }
11074
11075 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11076 }
11077 }
11078
11079 if (htab->got != NULL && htab->got->size != 0)
11080 {
11081 /* Fill in the first entry in the global offset table.
11082 We use it to hold the link-time TOCbase. */
11083 bfd_put_64 (output_bfd,
11084 elf_gp (output_bfd) + TOC_BASE_OFF,
11085 htab->got->contents);
11086
11087 /* Set .got entry size. */
11088 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11089 }
11090
11091 if (htab->plt != NULL && htab->plt->size != 0)
11092 {
11093 /* Set .plt entry size. */
11094 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11095 = PLT_ENTRY_SIZE;
11096 }
11097
11098 /* We need to handle writing out multiple GOT sections ourselves,
11099 since we didn't add them to DYNOBJ. We know dynobj is the first
11100 bfd. */
11101 while ((dynobj = dynobj->link_next) != NULL)
11102 {
11103 asection *s;
11104
11105 if (!is_ppc64_elf_target (dynobj->xvec))
11106 continue;
11107
11108 s = ppc64_elf_tdata (dynobj)->got;
11109 if (s != NULL
11110 && s->size != 0
11111 && s->output_section != bfd_abs_section_ptr
11112 && !bfd_set_section_contents (output_bfd, s->output_section,
11113 s->contents, s->output_offset,
11114 s->size))
11115 return FALSE;
11116 s = ppc64_elf_tdata (dynobj)->relgot;
11117 if (s != NULL
11118 && s->size != 0
11119 && s->output_section != bfd_abs_section_ptr
11120 && !bfd_set_section_contents (output_bfd, s->output_section,
11121 s->contents, s->output_offset,
11122 s->size))
11123 return FALSE;
11124 }
11125
11126 return TRUE;
11127 }
11128
11129 #include "elf64-target.h"