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bfd/
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])));
2123 cache_ptr->howto = ppc64_elf_howto_table[type];
2124 }
2125
2126 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 /* If this is a relocatable link (output_bfd test tells us), just
2134 call the generic function. Any adjustment will be done at final
2135 link time. */
2136 if (output_bfd != NULL)
2137 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2138 input_section, output_bfd, error_message);
2139
2140 /* Adjust the addend for sign extension of the low 16 bits.
2141 We won't actually be using the low 16 bits, so trashing them
2142 doesn't matter. */
2143 reloc_entry->addend += 0x8000;
2144 return bfd_reloc_continue;
2145 }
2146
2147 static bfd_reloc_status_type
2148 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2149 void *data, asection *input_section,
2150 bfd *output_bfd, char **error_message)
2151 {
2152 if (output_bfd != NULL)
2153 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2154 input_section, output_bfd, error_message);
2155
2156 if (strcmp (symbol->section->name, ".opd") == 0
2157 && (symbol->section->owner->flags & DYNAMIC) == 0)
2158 {
2159 bfd_vma dest = opd_entry_value (symbol->section,
2160 symbol->value + reloc_entry->addend,
2161 NULL, NULL);
2162 if (dest != (bfd_vma) -1)
2163 reloc_entry->addend = dest - (symbol->value
2164 + symbol->section->output_section->vma
2165 + symbol->section->output_offset);
2166 }
2167 return bfd_reloc_continue;
2168 }
2169
2170 static bfd_reloc_status_type
2171 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2172 void *data, asection *input_section,
2173 bfd *output_bfd, char **error_message)
2174 {
2175 long insn;
2176 enum elf_ppc64_reloc_type r_type;
2177 bfd_size_type octets;
2178 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2179 bfd_boolean is_power4 = FALSE;
2180
2181 /* If this is a relocatable link (output_bfd test tells us), just
2182 call the generic function. Any adjustment will be done at final
2183 link time. */
2184 if (output_bfd != NULL)
2185 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2186 input_section, output_bfd, error_message);
2187
2188 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2189 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2190 insn &= ~(0x01 << 21);
2191 r_type = reloc_entry->howto->type;
2192 if (r_type == R_PPC64_ADDR14_BRTAKEN
2193 || r_type == R_PPC64_REL14_BRTAKEN)
2194 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2195
2196 if (is_power4)
2197 {
2198 /* Set 'a' bit. This is 0b00010 in BO field for branch
2199 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2200 for branch on CTR insns (BO == 1a00t or 1a01t). */
2201 if ((insn & (0x14 << 21)) == (0x04 << 21))
2202 insn |= 0x02 << 21;
2203 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2204 insn |= 0x08 << 21;
2205 else
2206 goto out;
2207 }
2208 else
2209 {
2210 bfd_vma target = 0;
2211 bfd_vma from;
2212
2213 if (!bfd_is_com_section (symbol->section))
2214 target = symbol->value;
2215 target += symbol->section->output_section->vma;
2216 target += symbol->section->output_offset;
2217 target += reloc_entry->addend;
2218
2219 from = (reloc_entry->address
2220 + input_section->output_offset
2221 + input_section->output_section->vma);
2222
2223 /* Invert 'y' bit if not the default. */
2224 if ((bfd_signed_vma) (target - from) < 0)
2225 insn ^= 0x01 << 21;
2226 }
2227 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2228 out:
2229 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2230 input_section, output_bfd, error_message);
2231 }
2232
2233 static bfd_reloc_status_type
2234 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2235 void *data, asection *input_section,
2236 bfd *output_bfd, char **error_message)
2237 {
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 /* Subtract the symbol section base address. */
2246 reloc_entry->addend -= symbol->section->output_section->vma;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 /* If this is a relocatable link (output_bfd test tells us), just
2256 call the generic function. Any adjustment will be done at final
2257 link time. */
2258 if (output_bfd != NULL)
2259 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2260 input_section, output_bfd, error_message);
2261
2262 /* Subtract the symbol section base address. */
2263 reloc_entry->addend -= symbol->section->output_section->vma;
2264
2265 /* Adjust the addend for sign extension of the low 16 bits. */
2266 reloc_entry->addend += 0x8000;
2267 return bfd_reloc_continue;
2268 }
2269
2270 static bfd_reloc_status_type
2271 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2272 void *data, asection *input_section,
2273 bfd *output_bfd, char **error_message)
2274 {
2275 bfd_vma TOCstart;
2276
2277 /* If this is a relocatable link (output_bfd test tells us), just
2278 call the generic function. Any adjustment will be done at final
2279 link time. */
2280 if (output_bfd != NULL)
2281 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2282 input_section, output_bfd, error_message);
2283
2284 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2285 if (TOCstart == 0)
2286 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2287
2288 /* Subtract the TOC base address. */
2289 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2290 return bfd_reloc_continue;
2291 }
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 bfd_vma TOCstart;
2299
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2308 if (TOCstart == 0)
2309 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2310
2311 /* Subtract the TOC base address. */
2312 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2313
2314 /* Adjust the addend for sign extension of the low 16 bits. */
2315 reloc_entry->addend += 0x8000;
2316 return bfd_reloc_continue;
2317 }
2318
2319 static bfd_reloc_status_type
2320 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2321 void *data, asection *input_section,
2322 bfd *output_bfd, char **error_message)
2323 {
2324 bfd_vma TOCstart;
2325 bfd_size_type octets;
2326
2327 /* If this is a relocatable link (output_bfd test tells us), just
2328 call the generic function. Any adjustment will be done at final
2329 link time. */
2330 if (output_bfd != NULL)
2331 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2332 input_section, output_bfd, error_message);
2333
2334 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2335 if (TOCstart == 0)
2336 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2337
2338 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2339 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2340 return bfd_reloc_ok;
2341 }
2342
2343 static bfd_reloc_status_type
2344 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2345 void *data, asection *input_section,
2346 bfd *output_bfd, char **error_message)
2347 {
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 if (error_message != NULL)
2356 {
2357 static char buf[60];
2358 sprintf (buf, "generic linker can't handle %s",
2359 reloc_entry->howto->name);
2360 *error_message = buf;
2361 }
2362 return bfd_reloc_dangerous;
2363 }
2364
2365 struct ppc64_elf_obj_tdata
2366 {
2367 struct elf_obj_tdata elf;
2368
2369 /* Shortcuts to dynamic linker sections. */
2370 asection *got;
2371 asection *relgot;
2372
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2378 sections means we potentially need one of these for each input bfd. */
2379 union {
2380 bfd_signed_vma refcount;
2381 bfd_vma offset;
2382 } tlsld_got;
2383
2384 /* A copy of relocs before they are modified for --emit-relocs. */
2385 Elf_Internal_Rela *opd_relocs;
2386 };
2387
2388 #define ppc64_elf_tdata(bfd) \
2389 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2390
2391 #define ppc64_tlsld_got(bfd) \
2392 (&ppc64_elf_tdata (bfd)->tlsld_got)
2393
2394 /* Override the generic function because we store some extras. */
2395
2396 static bfd_boolean
2397 ppc64_elf_mkobject (bfd *abfd)
2398 {
2399 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2400 abfd->tdata.any = bfd_zalloc (abfd, amt);
2401 if (abfd->tdata.any == NULL)
2402 return FALSE;
2403 return TRUE;
2404 }
2405
2406 /* Return 1 if target is one of ours. */
2407
2408 static bfd_boolean
2409 is_ppc64_elf_target (const struct bfd_target *targ)
2410 {
2411 extern const bfd_target bfd_elf64_powerpc_vec;
2412 extern const bfd_target bfd_elf64_powerpcle_vec;
2413
2414 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2415 }
2416
2417 /* Fix bad default arch selected for a 64 bit input bfd when the
2418 default is 32 bit. */
2419
2420 static bfd_boolean
2421 ppc64_elf_object_p (bfd *abfd)
2422 {
2423 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2424 {
2425 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2426
2427 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2428 {
2429 /* Relies on arch after 32 bit default being 64 bit default. */
2430 abfd->arch_info = abfd->arch_info->next;
2431 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2432 }
2433 }
2434 return TRUE;
2435 }
2436
2437 /* Support for core dump NOTE sections. */
2438
2439 static bfd_boolean
2440 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2441 {
2442 size_t offset, size;
2443
2444 if (note->descsz != 504)
2445 return FALSE;
2446
2447 /* pr_cursig */
2448 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2449
2450 /* pr_pid */
2451 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2452
2453 /* pr_reg */
2454 offset = 112;
2455 size = 384;
2456
2457 /* Make a ".reg/999" section. */
2458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2459 size, note->descpos + offset);
2460 }
2461
2462 static bfd_boolean
2463 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2464 {
2465 if (note->descsz != 136)
2466 return FALSE;
2467
2468 elf_tdata (abfd)->core_program
2469 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2470 elf_tdata (abfd)->core_command
2471 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2472
2473 return TRUE;
2474 }
2475
2476 /* Merge backend specific data from an object file to the output
2477 object file when linking. */
2478
2479 static bfd_boolean
2480 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2481 {
2482 /* Check if we have the same endianess. */
2483 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2484 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2485 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2486 {
2487 const char *msg;
2488
2489 if (bfd_big_endian (ibfd))
2490 msg = _("%B: compiled for a big endian system "
2491 "and target is little endian");
2492 else
2493 msg = _("%B: compiled for a little endian system "
2494 "and target is big endian");
2495
2496 (*_bfd_error_handler) (msg, ibfd);
2497
2498 bfd_set_error (bfd_error_wrong_format);
2499 return FALSE;
2500 }
2501
2502 return TRUE;
2503 }
2504
2505 /* Add extra PPC sections. */
2506
2507 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2508 {
2509 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2510 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2511 { ".plt", 4, 0, SHT_NOBITS, 0 },
2512 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2513 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2514 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 struct _ppc64_elf_section_data
2519 {
2520 struct bfd_elf_section_data elf;
2521
2522 /* An array with one entry for each opd function descriptor. */
2523 union
2524 {
2525 /* Points to the function code section for local opd entries. */
2526 asection **func_sec;
2527 /* After editing .opd, adjust references to opd local syms. */
2528 long *adjust;
2529 } opd;
2530
2531 /* An array for toc sections, indexed by offset/8.
2532 Specifies the relocation symbol index used at a given toc offset. */
2533 unsigned *t_symndx;
2534 };
2535
2536 #define ppc64_elf_section_data(sec) \
2537 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2538
2539 static bfd_boolean
2540 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2541 {
2542 struct _ppc64_elf_section_data *sdata;
2543 bfd_size_type amt = sizeof (*sdata);
2544
2545 sdata = bfd_zalloc (abfd, amt);
2546 if (sdata == NULL)
2547 return FALSE;
2548 sec->used_by_bfd = sdata;
2549
2550 return _bfd_elf_new_section_hook (abfd, sec);
2551 }
2552
2553 static void *
2554 get_opd_info (asection * sec)
2555 {
2556 if (sec != NULL
2557 && ppc64_elf_section_data (sec) != NULL
2558 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2559 return ppc64_elf_section_data (sec)->opd.adjust;
2560 return NULL;
2561 }
2562 \f
2563 /* Parameters for the qsort hook. */
2564 static asection *synthetic_opd;
2565 static bfd_boolean synthetic_relocatable;
2566
2567 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2568
2569 static int
2570 compare_symbols (const void *ap, const void *bp)
2571 {
2572 const asymbol *a = * (const asymbol **) ap;
2573 const asymbol *b = * (const asymbol **) bp;
2574
2575 /* Section symbols first. */
2576 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2577 return -1;
2578 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2579 return 1;
2580
2581 /* then .opd symbols. */
2582 if (a->section == synthetic_opd && b->section != synthetic_opd)
2583 return -1;
2584 if (a->section != synthetic_opd && b->section == synthetic_opd)
2585 return 1;
2586
2587 /* then other code symbols. */
2588 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2589 == (SEC_CODE | SEC_ALLOC)
2590 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2591 != (SEC_CODE | SEC_ALLOC))
2592 return -1;
2593
2594 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2595 != (SEC_CODE | SEC_ALLOC)
2596 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2597 == (SEC_CODE | SEC_ALLOC))
2598 return 1;
2599
2600 if (synthetic_relocatable)
2601 {
2602 if (a->section->id < b->section->id)
2603 return -1;
2604
2605 if (a->section->id > b->section->id)
2606 return 1;
2607 }
2608
2609 if (a->value + a->section->vma < b->value + b->section->vma)
2610 return -1;
2611
2612 if (a->value + a->section->vma > b->value + b->section->vma)
2613 return 1;
2614
2615 return 0;
2616 }
2617
2618 /* Search SYMS for a symbol of the given VALUE. */
2619
2620 static asymbol *
2621 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2622 {
2623 long mid;
2624
2625 if (id == -1)
2626 {
2627 while (lo < hi)
2628 {
2629 mid = (lo + hi) >> 1;
2630 if (syms[mid]->value + syms[mid]->section->vma < value)
2631 lo = mid + 1;
2632 else if (syms[mid]->value + syms[mid]->section->vma > value)
2633 hi = mid;
2634 else
2635 return syms[mid];
2636 }
2637 }
2638 else
2639 {
2640 while (lo < hi)
2641 {
2642 mid = (lo + hi) >> 1;
2643 if (syms[mid]->section->id < id)
2644 lo = mid + 1;
2645 else if (syms[mid]->section->id > id)
2646 hi = mid;
2647 else if (syms[mid]->value < value)
2648 lo = mid + 1;
2649 else if (syms[mid]->value > value)
2650 hi = mid;
2651 else
2652 return syms[mid];
2653 }
2654 }
2655 return NULL;
2656 }
2657
2658 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2659 entry syms. */
2660
2661 static long
2662 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2663 long static_count, asymbol **static_syms,
2664 long dyn_count, asymbol **dyn_syms,
2665 asymbol **ret)
2666 {
2667 asymbol *s;
2668 long i;
2669 long count;
2670 char *names;
2671 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2672 asection *opd;
2673 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2674 asymbol **syms;
2675
2676 *ret = NULL;
2677
2678 opd = bfd_get_section_by_name (abfd, ".opd");
2679 if (opd == NULL)
2680 return 0;
2681
2682 symcount = static_count;
2683 if (!relocatable)
2684 symcount += dyn_count;
2685 if (symcount == 0)
2686 return 0;
2687
2688 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2689 if (syms == NULL)
2690 return 0;
2691
2692 if (!relocatable && static_count != 0 && dyn_count != 0)
2693 {
2694 /* Use both symbol tables. */
2695 memcpy (syms, static_syms, static_count * sizeof (*syms));
2696 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2697 }
2698 else if (!relocatable && static_count == 0)
2699 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2700 else
2701 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2702
2703 synthetic_opd = opd;
2704 synthetic_relocatable = relocatable;
2705 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2706
2707 if (!relocatable && symcount > 1)
2708 {
2709 long j;
2710 /* Trim duplicate syms, since we may have merged the normal and
2711 dynamic symbols. Actually, we only care about syms that have
2712 different values, so trim any with the same value. */
2713 for (i = 1, j = 1; i < symcount; ++i)
2714 if (syms[i - 1]->value + syms[i - 1]->section->vma
2715 != syms[i]->value + syms[i]->section->vma)
2716 syms[j++] = syms[i];
2717 symcount = j;
2718 }
2719
2720 i = 0;
2721 if (syms[i]->section == opd)
2722 ++i;
2723 codesecsym = i;
2724
2725 for (; i < symcount; ++i)
2726 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2727 != (SEC_CODE | SEC_ALLOC))
2728 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2729 break;
2730 codesecsymend = i;
2731
2732 for (; i < symcount; ++i)
2733 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2734 break;
2735 secsymend = i;
2736
2737 for (; i < symcount; ++i)
2738 if (syms[i]->section != opd)
2739 break;
2740 opdsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2744 != (SEC_CODE | SEC_ALLOC))
2745 break;
2746 symcount = i;
2747
2748 count = 0;
2749 if (opdsymend == secsymend)
2750 goto done;
2751
2752 if (relocatable)
2753 {
2754 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2755 arelent *r;
2756 size_t size;
2757 long relcount;
2758
2759 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2760 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2761
2762 if (! relcount
2763 || ! (*slurp_relocs) (abfd, opd, static_syms, FALSE))
2764 goto done;
2765
2766 size = 0;
2767 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2768 {
2769 asymbol *sym;
2770
2771 while (r < opd->relocation + relcount
2772 && r->address < syms[i]->value + opd->vma)
2773 ++r;
2774
2775 if (r == opd->relocation + relcount)
2776 break;
2777
2778 if (r->address != syms[i]->value + opd->vma)
2779 continue;
2780
2781 if (r->howto->type != R_PPC64_ADDR64)
2782 continue;
2783
2784 sym = *r->sym_ptr_ptr;
2785 if (!sym_exists_at (syms, opdsymend, symcount,
2786 sym->section->id, sym->value + r->addend))
2787 {
2788 ++count;
2789 size += sizeof (asymbol);
2790 size += strlen (syms[i]->name) + 2;
2791 }
2792 }
2793
2794 s = *ret = bfd_malloc (size);
2795 if (s == NULL)
2796 {
2797 count = 0;
2798 goto done;
2799 }
2800
2801 names = (char *) (s + count);
2802
2803 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2804 {
2805 asymbol *sym;
2806
2807 while (r < opd->relocation + relcount
2808 && r->address < syms[i]->value + opd->vma)
2809 ++r;
2810
2811 if (r == opd->relocation + relcount)
2812 break;
2813
2814 if (r->address != syms[i]->value + opd->vma)
2815 continue;
2816
2817 if (r->howto->type != R_PPC64_ADDR64)
2818 continue;
2819
2820 sym = *r->sym_ptr_ptr;
2821 if (!sym_exists_at (syms, opdsymend, symcount,
2822 sym->section->id, sym->value + r->addend))
2823 {
2824 size_t len;
2825
2826 *s = *syms[i];
2827 s->section = sym->section;
2828 s->value = sym->value + r->addend;
2829 s->name = names;
2830 *names++ = '.';
2831 len = strlen (syms[i]->name);
2832 memcpy (names, syms[i]->name, len + 1);
2833 names += len + 1;
2834 s++;
2835 }
2836 }
2837 }
2838 else
2839 {
2840 bfd_byte *contents;
2841 size_t size;
2842
2843 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2844 {
2845 if (contents)
2846 {
2847 free_contents_and_exit:
2848 free (contents);
2849 }
2850 goto done;
2851 }
2852
2853 size = 0;
2854 for (i = secsymend; i < opdsymend; ++i)
2855 {
2856 bfd_vma ent;
2857
2858 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2859 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2860 {
2861 ++count;
2862 size += sizeof (asymbol);
2863 size += strlen (syms[i]->name) + 2;
2864 }
2865 }
2866
2867 s = *ret = bfd_malloc (size);
2868 if (s == NULL)
2869 {
2870 count = 0;
2871 goto free_contents_and_exit;
2872 }
2873
2874 names = (char *) (s + count);
2875
2876 for (i = secsymend; i < opdsymend; ++i)
2877 {
2878 bfd_vma ent;
2879
2880 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2881 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2882 {
2883 long lo, hi;
2884 size_t len;
2885 asection *sec = abfd->sections;
2886
2887 *s = *syms[i];
2888 lo = codesecsym;
2889 hi = codesecsymend;
2890 while (lo < hi)
2891 {
2892 long mid = (lo + hi) >> 1;
2893 if (syms[mid]->section->vma < ent)
2894 lo = mid + 1;
2895 else if (syms[mid]->section->vma > ent)
2896 hi = mid;
2897 else
2898 {
2899 sec = syms[mid]->section;
2900 break;
2901 }
2902 }
2903
2904 if (lo >= hi && lo > codesecsym)
2905 sec = syms[lo - 1]->section;
2906
2907 for (; sec != NULL; sec = sec->next)
2908 {
2909 if (sec->vma > ent)
2910 break;
2911 if ((sec->flags & SEC_ALLOC) == 0
2912 || (sec->flags & SEC_LOAD) == 0)
2913 break;
2914 if ((sec->flags & SEC_CODE) != 0)
2915 s->section = sec;
2916 }
2917 s->value = ent - s->section->vma;
2918 s->name = names;
2919 *names++ = '.';
2920 len = strlen (syms[i]->name);
2921 memcpy (names, syms[i]->name, len + 1);
2922 names += len + 1;
2923 s++;
2924 }
2925 }
2926 free (contents);
2927 }
2928
2929 done:
2930 free (syms);
2931 return count;
2932 }
2933 \f
2934 /* The following functions are specific to the ELF linker, while
2935 functions above are used generally. Those named ppc64_elf_* are
2936 called by the main ELF linker code. They appear in this file more
2937 or less in the order in which they are called. eg.
2938 ppc64_elf_check_relocs is called early in the link process,
2939 ppc64_elf_finish_dynamic_sections is one of the last functions
2940 called.
2941
2942 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2943 functions have both a function code symbol and a function descriptor
2944 symbol. A call to foo in a relocatable object file looks like:
2945
2946 . .text
2947 . x:
2948 . bl .foo
2949 . nop
2950
2951 The function definition in another object file might be:
2952
2953 . .section .opd
2954 . foo: .quad .foo
2955 . .quad .TOC.@tocbase
2956 . .quad 0
2957 .
2958 . .text
2959 . .foo: blr
2960
2961 When the linker resolves the call during a static link, the branch
2962 unsurprisingly just goes to .foo and the .opd information is unused.
2963 If the function definition is in a shared library, things are a little
2964 different: The call goes via a plt call stub, the opd information gets
2965 copied to the plt, and the linker patches the nop.
2966
2967 . x:
2968 . bl .foo_stub
2969 . ld 2,40(1)
2970 .
2971 .
2972 . .foo_stub:
2973 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2974 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2975 . std 2,40(1) # this is the general idea
2976 . ld 11,0(12)
2977 . ld 2,8(12)
2978 . mtctr 11
2979 . ld 11,16(12)
2980 . bctr
2981 .
2982 . .section .plt
2983 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2984
2985 The "reloc ()" notation is supposed to indicate that the linker emits
2986 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2987 copying.
2988
2989 What are the difficulties here? Well, firstly, the relocations
2990 examined by the linker in check_relocs are against the function code
2991 sym .foo, while the dynamic relocation in the plt is emitted against
2992 the function descriptor symbol, foo. Somewhere along the line, we need
2993 to carefully copy dynamic link information from one symbol to the other.
2994 Secondly, the generic part of the elf linker will make .foo a dynamic
2995 symbol as is normal for most other backends. We need foo dynamic
2996 instead, at least for an application final link. However, when
2997 creating a shared library containing foo, we need to have both symbols
2998 dynamic so that references to .foo are satisfied during the early
2999 stages of linking. Otherwise the linker might decide to pull in a
3000 definition from some other object, eg. a static library.
3001
3002 Update: As of August 2004, we support a new convention. Function
3003 calls may use the function descriptor symbol, ie. "bl foo". This
3004 behaves exactly as "bl .foo". */
3005
3006 /* The linker needs to keep track of the number of relocs that it
3007 decides to copy as dynamic relocs in check_relocs for each symbol.
3008 This is so that it can later discard them if they are found to be
3009 unnecessary. We store the information in a field extending the
3010 regular ELF linker hash table. */
3011
3012 struct ppc_dyn_relocs
3013 {
3014 struct ppc_dyn_relocs *next;
3015
3016 /* The input section of the reloc. */
3017 asection *sec;
3018
3019 /* Total number of relocs copied for the input section. */
3020 bfd_size_type count;
3021
3022 /* Number of pc-relative relocs copied for the input section. */
3023 bfd_size_type pc_count;
3024 };
3025
3026 /* Track GOT entries needed for a given symbol. We might need more
3027 than one got entry per symbol. */
3028 struct got_entry
3029 {
3030 struct got_entry *next;
3031
3032 /* The symbol addend that we'll be placing in the GOT. */
3033 bfd_vma addend;
3034
3035 /* Unlike other ELF targets, we use separate GOT entries for the same
3036 symbol referenced from different input files. This is to support
3037 automatic multiple TOC/GOT sections, where the TOC base can vary
3038 from one input file to another.
3039
3040 Point to the BFD owning this GOT entry. */
3041 bfd *owner;
3042
3043 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3044 TLS_TPREL or TLS_DTPREL for tls entries. */
3045 char tls_type;
3046
3047 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } got;
3053 };
3054
3055 /* The same for PLT. */
3056 struct plt_entry
3057 {
3058 struct plt_entry *next;
3059
3060 bfd_vma addend;
3061
3062 union
3063 {
3064 bfd_signed_vma refcount;
3065 bfd_vma offset;
3066 } plt;
3067 };
3068
3069 /* Of those relocs that might be copied as dynamic relocs, this macro
3070 selects those that must be copied when linking a shared library,
3071 even when the symbol is local. */
3072
3073 #define MUST_BE_DYN_RELOC(RTYPE) \
3074 ((RTYPE) != R_PPC64_REL32 \
3075 && (RTYPE) != R_PPC64_REL64 \
3076 && (RTYPE) != R_PPC64_REL30)
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. With code that gcc generates, it's vital that this be
3082 enabled; In the PowerPC64 ABI, the address of a function is actually
3083 the address of a function descriptor, which resides in the .opd
3084 section. gcc uses the descriptor directly rather than going via the
3085 GOT as some other ABI's do, which means that initialized function
3086 pointers must reference the descriptor. Thus, a function pointer
3087 initialized to the address of a function in a shared library will
3088 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3089 redefines the function descriptor symbol to point to the copy. This
3090 presents a problem as a plt entry for that function is also
3091 initialized from the function descriptor symbol and the copy reloc
3092 may not be initialized first. */
3093 #define ELIMINATE_COPY_RELOCS 1
3094
3095 /* Section name for stubs is the associated section name plus this
3096 string. */
3097 #define STUB_SUFFIX ".stub"
3098
3099 /* Linker stubs.
3100 ppc_stub_long_branch:
3101 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3102 destination, but a 24 bit branch in a stub section will reach.
3103 . b dest
3104
3105 ppc_stub_plt_branch:
3106 Similar to the above, but a 24 bit branch in the stub section won't
3107 reach its destination.
3108 . addis %r12,%r2,xxx@toc@ha
3109 . ld %r11,xxx@toc@l(%r12)
3110 . mtctr %r11
3111 . bctr
3112
3113 ppc_stub_plt_call:
3114 Used to call a function in a shared library. If it so happens that
3115 the plt entry referenced crosses a 64k boundary, then an extra
3116 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3117 xxx+16 as appropriate.
3118 . addis %r12,%r2,xxx@toc@ha
3119 . std %r2,40(%r1)
3120 . ld %r11,xxx+0@toc@l(%r12)
3121 . ld %r2,xxx+8@toc@l(%r12)
3122 . mtctr %r11
3123 . ld %r11,xxx+16@toc@l(%r12)
3124 . bctr
3125
3126 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3127 code to adjust the value and save r2 to support multiple toc sections.
3128 A ppc_stub_long_branch with an r2 offset looks like:
3129 . std %r2,40(%r1)
3130 . addis %r2,%r2,off@ha
3131 . addi %r2,%r2,off@l
3132 . b dest
3133
3134 A ppc_stub_plt_branch with an r2 offset looks like:
3135 . std %r2,40(%r1)
3136 . addis %r12,%r2,xxx@toc@ha
3137 . ld %r11,xxx@toc@l(%r12)
3138 . addis %r2,%r2,off@ha
3139 . addi %r2,%r2,off@l
3140 . mtctr %r11
3141 . bctr
3142 */
3143
3144 enum ppc_stub_type {
3145 ppc_stub_none,
3146 ppc_stub_long_branch,
3147 ppc_stub_long_branch_r2off,
3148 ppc_stub_plt_branch,
3149 ppc_stub_plt_branch_r2off,
3150 ppc_stub_plt_call
3151 };
3152
3153 struct ppc_stub_hash_entry {
3154
3155 /* Base hash table entry structure. */
3156 struct bfd_hash_entry root;
3157
3158 enum ppc_stub_type stub_type;
3159
3160 /* The stub section. */
3161 asection *stub_sec;
3162
3163 /* Offset within stub_sec of the beginning of this stub. */
3164 bfd_vma stub_offset;
3165
3166 /* Given the symbol's value and its section we can determine its final
3167 value when building the stubs (so the stub knows where to jump. */
3168 bfd_vma target_value;
3169 asection *target_section;
3170
3171 /* The symbol table entry, if any, that this was derived from. */
3172 struct ppc_link_hash_entry *h;
3173
3174 /* And the reloc addend that this was derived from. */
3175 bfd_vma addend;
3176
3177 /* Where this stub is being called from, or, in the case of combined
3178 stub sections, the first input section in the group. */
3179 asection *id_sec;
3180 };
3181
3182 struct ppc_branch_hash_entry {
3183
3184 /* Base hash table entry structure. */
3185 struct bfd_hash_entry root;
3186
3187 /* Offset within .branch_lt. */
3188 unsigned int offset;
3189
3190 /* Generation marker. */
3191 unsigned int iter;
3192 };
3193
3194 struct ppc_link_hash_entry
3195 {
3196 struct elf_link_hash_entry elf;
3197
3198 /* A pointer to the most recently used stub hash entry against this
3199 symbol. */
3200 struct ppc_stub_hash_entry *stub_cache;
3201
3202 /* Track dynamic relocs copied for this symbol. */
3203 struct ppc_dyn_relocs *dyn_relocs;
3204
3205 /* Link between function code and descriptor symbols. */
3206 struct ppc_link_hash_entry *oh;
3207
3208 /* Flag function code and descriptor symbols. */
3209 unsigned int is_func:1;
3210 unsigned int is_func_descriptor:1;
3211
3212 /* Whether global opd/toc sym has been adjusted or not.
3213 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3214 should be set for all globals defined in any opd/toc section. */
3215 unsigned int adjust_done:1;
3216
3217 /* Set if we twiddled this symbol to weak at some stage. */
3218 unsigned int was_undefined:1;
3219
3220 /* Contexts in which symbol is used in the GOT (or TOC).
3221 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3222 corresponding relocs are encountered during check_relocs.
3223 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3224 indicate the corresponding GOT entry type is not needed.
3225 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3226 a TPREL one. We use a separate flag rather than setting TPREL
3227 just for convenience in distinguishing the two cases. */
3228 #define TLS_GD 1 /* GD reloc. */
3229 #define TLS_LD 2 /* LD reloc. */
3230 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3231 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3232 #define TLS_TLS 16 /* Any TLS reloc. */
3233 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3234 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3235 char tls_mask;
3236 };
3237
3238 /* ppc64 ELF linker hash table. */
3239
3240 struct ppc_link_hash_table
3241 {
3242 struct elf_link_hash_table elf;
3243
3244 /* The stub hash table. */
3245 struct bfd_hash_table stub_hash_table;
3246
3247 /* Another hash table for plt_branch stubs. */
3248 struct bfd_hash_table branch_hash_table;
3249
3250 /* Linker stub bfd. */
3251 bfd *stub_bfd;
3252
3253 /* Linker call-backs. */
3254 asection * (*add_stub_section) (const char *, asection *);
3255 void (*layout_sections_again) (void);
3256
3257 /* Array to keep track of which stub sections have been created, and
3258 information on stub grouping. */
3259 struct map_stub {
3260 /* This is the section to which stubs in the group will be attached. */
3261 asection *link_sec;
3262 /* The stub section. */
3263 asection *stub_sec;
3264 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3265 bfd_vma toc_off;
3266 } *stub_group;
3267
3268 /* Temp used when calculating TOC pointers. */
3269 bfd_vma toc_curr;
3270
3271 /* Highest input section id. */
3272 int top_id;
3273
3274 /* Highest output section index. */
3275 int top_index;
3276
3277 /* List of input sections for each output section. */
3278 asection **input_list;
3279
3280 /* Short-cuts to get to dynamic linker sections. */
3281 asection *got;
3282 asection *plt;
3283 asection *relplt;
3284 asection *dynbss;
3285 asection *relbss;
3286 asection *glink;
3287 asection *sfpr;
3288 asection *brlt;
3289 asection *relbrlt;
3290
3291 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3292 struct ppc_link_hash_entry *tls_get_addr;
3293 struct ppc_link_hash_entry *tls_get_addr_fd;
3294
3295 /* Statistics. */
3296 unsigned long stub_count[ppc_stub_plt_call];
3297
3298 /* Number of stubs against global syms. */
3299 unsigned long stub_globals;
3300
3301 /* Set if we should emit symbols for stubs. */
3302 unsigned int emit_stub_syms:1;
3303
3304 /* Support for multiple toc sections. */
3305 unsigned int no_multi_toc:1;
3306 unsigned int multi_toc_needed:1;
3307
3308 /* Set on error. */
3309 unsigned int stub_error:1;
3310
3311 /* Flag set when small branches are detected. Used to
3312 select suitable defaults for the stub group size. */
3313 unsigned int has_14bit_branch:1;
3314
3315 /* Temp used by ppc64_elf_check_directives. */
3316 unsigned int twiddled_syms:1;
3317
3318 /* Incremented every time we size stubs. */
3319 unsigned int stub_iteration;
3320
3321 /* Small local sym to section mapping cache. */
3322 struct sym_sec_cache sym_sec;
3323 };
3324
3325 /* Rename some of the generic section flags to better document how they
3326 are used here. */
3327 #define has_toc_reloc has_gp_reloc
3328 #define makes_toc_func_call need_finalize_relax
3329 #define call_check_in_progress reloc_done
3330
3331 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3332
3333 #define ppc_hash_table(p) \
3334 ((struct ppc_link_hash_table *) ((p)->hash))
3335
3336 #define ppc_stub_hash_lookup(table, string, create, copy) \
3337 ((struct ppc_stub_hash_entry *) \
3338 bfd_hash_lookup ((table), (string), (create), (copy)))
3339
3340 #define ppc_branch_hash_lookup(table, string, create, copy) \
3341 ((struct ppc_branch_hash_entry *) \
3342 bfd_hash_lookup ((table), (string), (create), (copy)))
3343
3344 /* Create an entry in the stub hash table. */
3345
3346 static struct bfd_hash_entry *
3347 stub_hash_newfunc (struct bfd_hash_entry *entry,
3348 struct bfd_hash_table *table,
3349 const char *string)
3350 {
3351 /* Allocate the structure if it has not already been allocated by a
3352 subclass. */
3353 if (entry == NULL)
3354 {
3355 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3356 if (entry == NULL)
3357 return entry;
3358 }
3359
3360 /* Call the allocation method of the superclass. */
3361 entry = bfd_hash_newfunc (entry, table, string);
3362 if (entry != NULL)
3363 {
3364 struct ppc_stub_hash_entry *eh;
3365
3366 /* Initialize the local fields. */
3367 eh = (struct ppc_stub_hash_entry *) entry;
3368 eh->stub_type = ppc_stub_none;
3369 eh->stub_sec = NULL;
3370 eh->stub_offset = 0;
3371 eh->target_value = 0;
3372 eh->target_section = NULL;
3373 eh->h = NULL;
3374 eh->id_sec = NULL;
3375 }
3376
3377 return entry;
3378 }
3379
3380 /* Create an entry in the branch hash table. */
3381
3382 static struct bfd_hash_entry *
3383 branch_hash_newfunc (struct bfd_hash_entry *entry,
3384 struct bfd_hash_table *table,
3385 const char *string)
3386 {
3387 /* Allocate the structure if it has not already been allocated by a
3388 subclass. */
3389 if (entry == NULL)
3390 {
3391 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3392 if (entry == NULL)
3393 return entry;
3394 }
3395
3396 /* Call the allocation method of the superclass. */
3397 entry = bfd_hash_newfunc (entry, table, string);
3398 if (entry != NULL)
3399 {
3400 struct ppc_branch_hash_entry *eh;
3401
3402 /* Initialize the local fields. */
3403 eh = (struct ppc_branch_hash_entry *) entry;
3404 eh->offset = 0;
3405 eh->iter = 0;
3406 }
3407
3408 return entry;
3409 }
3410
3411 /* Create an entry in a ppc64 ELF linker hash table. */
3412
3413 static struct bfd_hash_entry *
3414 link_hash_newfunc (struct bfd_hash_entry *entry,
3415 struct bfd_hash_table *table,
3416 const char *string)
3417 {
3418 /* Allocate the structure if it has not already been allocated by a
3419 subclass. */
3420 if (entry == NULL)
3421 {
3422 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3423 if (entry == NULL)
3424 return entry;
3425 }
3426
3427 /* Call the allocation method of the superclass. */
3428 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3429 if (entry != NULL)
3430 {
3431 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3432
3433 eh->stub_cache = NULL;
3434 eh->dyn_relocs = NULL;
3435 eh->oh = NULL;
3436 eh->is_func = 0;
3437 eh->is_func_descriptor = 0;
3438 eh->adjust_done = 0;
3439 eh->was_undefined = 0;
3440 eh->tls_mask = 0;
3441 }
3442
3443 return entry;
3444 }
3445
3446 /* Create a ppc64 ELF linker hash table. */
3447
3448 static struct bfd_link_hash_table *
3449 ppc64_elf_link_hash_table_create (bfd *abfd)
3450 {
3451 struct ppc_link_hash_table *htab;
3452 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3453
3454 htab = bfd_zmalloc (amt);
3455 if (htab == NULL)
3456 return NULL;
3457
3458 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3459 {
3460 free (htab);
3461 return NULL;
3462 }
3463
3464 /* Init the stub hash table too. */
3465 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3466 return NULL;
3467
3468 /* And the branch hash table. */
3469 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3470 return NULL;
3471
3472 /* Initializing two fields of the union is just cosmetic. We really
3473 only care about glist, but when compiled on a 32-bit host the
3474 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3475 debugger inspection of these fields look nicer. */
3476 htab->elf.init_refcount.refcount = 0;
3477 htab->elf.init_refcount.glist = NULL;
3478 htab->elf.init_offset.offset = 0;
3479 htab->elf.init_offset.glist = NULL;
3480
3481 return &htab->elf.root;
3482 }
3483
3484 /* Free the derived linker hash table. */
3485
3486 static void
3487 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3488 {
3489 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3490
3491 bfd_hash_table_free (&ret->stub_hash_table);
3492 bfd_hash_table_free (&ret->branch_hash_table);
3493 _bfd_generic_link_hash_table_free (hash);
3494 }
3495
3496 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3497
3498 void
3499 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3500 {
3501 struct ppc_link_hash_table *htab;
3502
3503 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3504
3505 /* Always hook our dynamic sections into the first bfd, which is the
3506 linker created stub bfd. This ensures that the GOT header is at
3507 the start of the output TOC section. */
3508 htab = ppc_hash_table (info);
3509 htab->stub_bfd = abfd;
3510 htab->elf.dynobj = abfd;
3511 }
3512
3513 /* Build a name for an entry in the stub hash table. */
3514
3515 static char *
3516 ppc_stub_name (const asection *input_section,
3517 const asection *sym_sec,
3518 const struct ppc_link_hash_entry *h,
3519 const Elf_Internal_Rela *rel)
3520 {
3521 char *stub_name;
3522 bfd_size_type len;
3523
3524 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3525 offsets from a sym as a branch target? In fact, we could
3526 probably assume the addend is always zero. */
3527 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3528
3529 if (h)
3530 {
3531 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3532 stub_name = bfd_malloc (len);
3533 if (stub_name != NULL)
3534 {
3535 sprintf (stub_name, "%08x.%s+%x",
3536 input_section->id & 0xffffffff,
3537 h->elf.root.root.string,
3538 (int) rel->r_addend & 0xffffffff);
3539 }
3540 }
3541 else
3542 {
3543 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3544 stub_name = bfd_malloc (len);
3545 if (stub_name != NULL)
3546 {
3547 sprintf (stub_name, "%08x.%x:%x+%x",
3548 input_section->id & 0xffffffff,
3549 sym_sec->id & 0xffffffff,
3550 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3551 (int) rel->r_addend & 0xffffffff);
3552 }
3553 }
3554 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3555 stub_name[len - 2] = 0;
3556 return stub_name;
3557 }
3558
3559 /* Look up an entry in the stub hash. Stub entries are cached because
3560 creating the stub name takes a bit of time. */
3561
3562 static struct ppc_stub_hash_entry *
3563 ppc_get_stub_entry (const asection *input_section,
3564 const asection *sym_sec,
3565 struct ppc_link_hash_entry *h,
3566 const Elf_Internal_Rela *rel,
3567 struct ppc_link_hash_table *htab)
3568 {
3569 struct ppc_stub_hash_entry *stub_entry;
3570 const asection *id_sec;
3571
3572 /* If this input section is part of a group of sections sharing one
3573 stub section, then use the id of the first section in the group.
3574 Stub names need to include a section id, as there may well be
3575 more than one stub used to reach say, printf, and we need to
3576 distinguish between them. */
3577 id_sec = htab->stub_group[input_section->id].link_sec;
3578
3579 if (h != NULL && h->stub_cache != NULL
3580 && h->stub_cache->h == h
3581 && h->stub_cache->id_sec == id_sec)
3582 {
3583 stub_entry = h->stub_cache;
3584 }
3585 else
3586 {
3587 char *stub_name;
3588
3589 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3590 if (stub_name == NULL)
3591 return NULL;
3592
3593 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3594 stub_name, FALSE, FALSE);
3595 if (h != NULL)
3596 h->stub_cache = stub_entry;
3597
3598 free (stub_name);
3599 }
3600
3601 return stub_entry;
3602 }
3603
3604 /* Add a new stub entry to the stub hash. Not all fields of the new
3605 stub entry are initialised. */
3606
3607 static struct ppc_stub_hash_entry *
3608 ppc_add_stub (const char *stub_name,
3609 asection *section,
3610 struct ppc_link_hash_table *htab)
3611 {
3612 asection *link_sec;
3613 asection *stub_sec;
3614 struct ppc_stub_hash_entry *stub_entry;
3615
3616 link_sec = htab->stub_group[section->id].link_sec;
3617 stub_sec = htab->stub_group[section->id].stub_sec;
3618 if (stub_sec == NULL)
3619 {
3620 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3621 if (stub_sec == NULL)
3622 {
3623 size_t namelen;
3624 bfd_size_type len;
3625 char *s_name;
3626
3627 namelen = strlen (link_sec->name);
3628 len = namelen + sizeof (STUB_SUFFIX);
3629 s_name = bfd_alloc (htab->stub_bfd, len);
3630 if (s_name == NULL)
3631 return NULL;
3632
3633 memcpy (s_name, link_sec->name, namelen);
3634 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3635 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3636 if (stub_sec == NULL)
3637 return NULL;
3638 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3639 }
3640 htab->stub_group[section->id].stub_sec = stub_sec;
3641 }
3642
3643 /* Enter this entry into the linker stub hash table. */
3644 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3645 TRUE, FALSE);
3646 if (stub_entry == NULL)
3647 {
3648 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3649 section->owner, stub_name);
3650 return NULL;
3651 }
3652
3653 stub_entry->stub_sec = stub_sec;
3654 stub_entry->stub_offset = 0;
3655 stub_entry->id_sec = link_sec;
3656 return stub_entry;
3657 }
3658
3659 /* Create sections for linker generated code. */
3660
3661 static bfd_boolean
3662 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3663 {
3664 struct ppc_link_hash_table *htab;
3665 flagword flags;
3666
3667 htab = ppc_hash_table (info);
3668
3669 /* Create .sfpr for code to save and restore fp regs. */
3670 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3671 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3672 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3673 if (htab->sfpr == NULL
3674 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3675 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3676 return FALSE;
3677
3678 /* Create .glink for lazy dynamic linking support. */
3679 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3680 if (htab->glink == NULL
3681 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3682 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3683 return FALSE;
3684
3685 /* Create .branch_lt for plt_branch stubs. */
3686 flags = (SEC_ALLOC | SEC_LOAD
3687 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3688 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3689 if (htab->brlt == NULL
3690 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3691 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3692 return FALSE;
3693
3694 if (info->shared || info->emitrelocations)
3695 {
3696 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3697 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3698 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3699 if (!htab->relbrlt
3700 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3701 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3702 return FALSE;
3703 }
3704 return TRUE;
3705 }
3706
3707 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3708 not already done. */
3709
3710 static bfd_boolean
3711 create_got_section (bfd *abfd, struct bfd_link_info *info)
3712 {
3713 asection *got, *relgot;
3714 flagword flags;
3715 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3716
3717 if (!htab->got)
3718 {
3719 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3720 return FALSE;
3721
3722 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3723 if (!htab->got)
3724 abort ();
3725 }
3726
3727 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3728 | SEC_LINKER_CREATED);
3729
3730 got = bfd_make_section (abfd, ".got");
3731 if (!got
3732 || !bfd_set_section_flags (abfd, got, flags)
3733 || !bfd_set_section_alignment (abfd, got, 3))
3734 return FALSE;
3735
3736 relgot = bfd_make_section (abfd, ".rela.got");
3737 if (!relgot
3738 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3739 || ! bfd_set_section_alignment (abfd, relgot, 3))
3740 return FALSE;
3741
3742 ppc64_elf_tdata (abfd)->got = got;
3743 ppc64_elf_tdata (abfd)->relgot = relgot;
3744 return TRUE;
3745 }
3746
3747 /* Create the dynamic sections, and set up shortcuts. */
3748
3749 static bfd_boolean
3750 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3751 {
3752 struct ppc_link_hash_table *htab;
3753
3754 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3755 return FALSE;
3756
3757 htab = ppc_hash_table (info);
3758 if (!htab->got)
3759 htab->got = bfd_get_section_by_name (dynobj, ".got");
3760 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3761 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3762 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3763 if (!info->shared)
3764 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3765
3766 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3767 || (!info->shared && !htab->relbss))
3768 abort ();
3769
3770 return TRUE;
3771 }
3772
3773 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3774
3775 static void
3776 ppc64_elf_copy_indirect_symbol
3777 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3778 struct elf_link_hash_entry *dir,
3779 struct elf_link_hash_entry *ind)
3780 {
3781 struct ppc_link_hash_entry *edir, *eind;
3782
3783 edir = (struct ppc_link_hash_entry *) dir;
3784 eind = (struct ppc_link_hash_entry *) ind;
3785
3786 /* Copy over any dynamic relocs we may have on the indirect sym. */
3787 if (eind->dyn_relocs != NULL)
3788 {
3789 if (edir->dyn_relocs != NULL)
3790 {
3791 struct ppc_dyn_relocs **pp;
3792 struct ppc_dyn_relocs *p;
3793
3794 if (eind->elf.root.type == bfd_link_hash_indirect)
3795 abort ();
3796
3797 /* Add reloc counts against the weak sym to the strong sym
3798 list. Merge any entries against the same section. */
3799 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3800 {
3801 struct ppc_dyn_relocs *q;
3802
3803 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3804 if (q->sec == p->sec)
3805 {
3806 q->pc_count += p->pc_count;
3807 q->count += p->count;
3808 *pp = p->next;
3809 break;
3810 }
3811 if (q == NULL)
3812 pp = &p->next;
3813 }
3814 *pp = edir->dyn_relocs;
3815 }
3816
3817 edir->dyn_relocs = eind->dyn_relocs;
3818 eind->dyn_relocs = NULL;
3819 }
3820
3821 edir->is_func |= eind->is_func;
3822 edir->is_func_descriptor |= eind->is_func_descriptor;
3823 edir->tls_mask |= eind->tls_mask;
3824
3825 /* If called to transfer flags for a weakdef during processing
3826 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3827 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3828 if (!(ELIMINATE_COPY_RELOCS
3829 && eind->elf.root.type != bfd_link_hash_indirect
3830 && edir->elf.dynamic_adjusted))
3831 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3832
3833 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3834 edir->elf.ref_regular |= eind->elf.ref_regular;
3835 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3836 edir->elf.needs_plt |= eind->elf.needs_plt;
3837
3838 /* If we were called to copy over info for a weak sym, that's all. */
3839 if (eind->elf.root.type != bfd_link_hash_indirect)
3840 return;
3841
3842 /* Copy over got entries that we may have already seen to the
3843 symbol which just became indirect. */
3844 if (eind->elf.got.glist != NULL)
3845 {
3846 if (edir->elf.got.glist != NULL)
3847 {
3848 struct got_entry **entp;
3849 struct got_entry *ent;
3850
3851 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3852 {
3853 struct got_entry *dent;
3854
3855 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3856 if (dent->addend == ent->addend
3857 && dent->owner == ent->owner
3858 && dent->tls_type == ent->tls_type)
3859 {
3860 dent->got.refcount += ent->got.refcount;
3861 *entp = ent->next;
3862 break;
3863 }
3864 if (dent == NULL)
3865 entp = &ent->next;
3866 }
3867 *entp = edir->elf.got.glist;
3868 }
3869
3870 edir->elf.got.glist = eind->elf.got.glist;
3871 eind->elf.got.glist = NULL;
3872 }
3873
3874 /* And plt entries. */
3875 if (eind->elf.plt.plist != NULL)
3876 {
3877 if (edir->elf.plt.plist != NULL)
3878 {
3879 struct plt_entry **entp;
3880 struct plt_entry *ent;
3881
3882 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3883 {
3884 struct plt_entry *dent;
3885
3886 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3887 if (dent->addend == ent->addend)
3888 {
3889 dent->plt.refcount += ent->plt.refcount;
3890 *entp = ent->next;
3891 break;
3892 }
3893 if (dent == NULL)
3894 entp = &ent->next;
3895 }
3896 *entp = edir->elf.plt.plist;
3897 }
3898
3899 edir->elf.plt.plist = eind->elf.plt.plist;
3900 eind->elf.plt.plist = NULL;
3901 }
3902
3903 if (edir->elf.dynindx == -1)
3904 {
3905 edir->elf.dynindx = eind->elf.dynindx;
3906 edir->elf.dynstr_index = eind->elf.dynstr_index;
3907 eind->elf.dynindx = -1;
3908 eind->elf.dynstr_index = 0;
3909 }
3910 else
3911 BFD_ASSERT (eind->elf.dynindx == -1);
3912 }
3913
3914 /* Find the function descriptor hash entry from the given function code
3915 hash entry FH. Link the entries via their OH fields. */
3916
3917 static struct ppc_link_hash_entry *
3918 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3919 {
3920 struct ppc_link_hash_entry *fdh = fh->oh;
3921
3922 if (fdh == NULL)
3923 {
3924 const char *fd_name = fh->elf.root.root.string + 1;
3925
3926 fdh = (struct ppc_link_hash_entry *)
3927 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3928 if (fdh != NULL)
3929 {
3930 fdh->is_func_descriptor = 1;
3931 fdh->oh = fh;
3932 fh->is_func = 1;
3933 fh->oh = fdh;
3934 }
3935 }
3936
3937 return fdh;
3938 }
3939
3940 /* Hacks to support old ABI code.
3941 When making function calls, old ABI code references function entry
3942 points (dot symbols), while new ABI code references the function
3943 descriptor symbol. We need to make any combination of reference and
3944 definition work together, without breaking archive linking.
3945
3946 For a defined function "foo" and an undefined call to "bar":
3947 An old object defines "foo" and ".foo", references ".bar" (possibly
3948 "bar" too).
3949 A new object defines "foo" and references "bar".
3950
3951 A new object thus has no problem with its undefined symbols being
3952 satisfied by definitions in an old object. On the other hand, the
3953 old object won't have ".bar" satisfied by a new object. */
3954
3955 /* Fix function descriptor symbols defined in .opd sections to be
3956 function type. */
3957
3958 static bfd_boolean
3959 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3960 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3961 Elf_Internal_Sym *isym,
3962 const char **name ATTRIBUTE_UNUSED,
3963 flagword *flags ATTRIBUTE_UNUSED,
3964 asection **sec,
3965 bfd_vma *value ATTRIBUTE_UNUSED)
3966 {
3967 if (*sec != NULL
3968 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3969 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3970 return TRUE;
3971 }
3972
3973 /* This function makes an old ABI object reference to ".bar" cause the
3974 inclusion of a new ABI object archive that defines "bar". */
3975
3976 static struct elf_link_hash_entry *
3977 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3978 struct bfd_link_info *info,
3979 const char *name)
3980 {
3981 struct elf_link_hash_entry *h;
3982 char *dot_name;
3983 size_t len;
3984
3985 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3986 if (h != NULL)
3987 return h;
3988
3989 if (name[0] == '.')
3990 return h;
3991
3992 len = strlen (name);
3993 dot_name = bfd_alloc (abfd, len + 2);
3994 if (dot_name == NULL)
3995 return (struct elf_link_hash_entry *) 0 - 1;
3996 dot_name[0] = '.';
3997 memcpy (dot_name + 1, name, len + 1);
3998 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3999 bfd_release (abfd, dot_name);
4000 return h;
4001 }
4002
4003 /* This function satisfies all old ABI object references to ".bar" if a
4004 new ABI object defines "bar". Well, at least, undefined dot symbols
4005 are made weak. This stops later archive searches from including an
4006 object if we already have a function descriptor definition. It also
4007 prevents the linker complaining about undefined symbols.
4008 We also check and correct mismatched symbol visibility here. The
4009 most restrictive visibility of the function descriptor and the
4010 function entry symbol is used. */
4011
4012 static bfd_boolean
4013 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4014 {
4015 struct bfd_link_info *info;
4016 struct ppc_link_hash_table *htab;
4017 struct ppc_link_hash_entry *eh;
4018 struct ppc_link_hash_entry *fdh;
4019
4020 if (h->root.type == bfd_link_hash_indirect)
4021 return TRUE;
4022
4023 if (h->root.type == bfd_link_hash_warning)
4024 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4025
4026 if (h->root.root.string[0] != '.')
4027 return TRUE;
4028
4029 info = inf;
4030 htab = ppc_hash_table (info);
4031 eh = (struct ppc_link_hash_entry *) h;
4032 fdh = get_fdh (eh, htab);
4033 if (fdh != NULL)
4034 {
4035 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4036 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4037 if (entry_vis < descr_vis)
4038 fdh->elf.other += entry_vis - descr_vis;
4039 else if (entry_vis > descr_vis)
4040 eh->elf.other += descr_vis - entry_vis;
4041
4042 if (eh->elf.root.type == bfd_link_hash_undefined)
4043 {
4044 eh->elf.root.type = bfd_link_hash_undefweak;
4045 eh->was_undefined = 1;
4046 htab->twiddled_syms = 1;
4047 }
4048 }
4049
4050 return TRUE;
4051 }
4052
4053 static bfd_boolean
4054 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4055 struct bfd_link_info *info)
4056 {
4057 struct ppc_link_hash_table *htab;
4058
4059 htab = ppc_hash_table (info);
4060 if (!is_ppc64_elf_target (htab->elf.root.creator))
4061 return TRUE;
4062
4063 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, info);
4064
4065 /* We need to fix the undefs list for any syms we have twiddled to
4066 undef_weak. */
4067 if (htab->twiddled_syms)
4068 {
4069 struct bfd_link_hash_entry **pun;
4070
4071 pun = &htab->elf.root.undefs;
4072 while (*pun != NULL)
4073 {
4074 struct bfd_link_hash_entry *h = *pun;
4075
4076 if (h->type != bfd_link_hash_undefined
4077 && h->type != bfd_link_hash_common)
4078 {
4079 *pun = h->u.undef.next;
4080 h->u.undef.next = NULL;
4081 if (h == htab->elf.root.undefs_tail)
4082 {
4083 if (pun == &htab->elf.root.undefs)
4084 htab->elf.root.undefs_tail = NULL;
4085 else
4086 /* pun points at an u.undef.next field. Go back to
4087 the start of the link_hash_entry. */
4088 htab->elf.root.undefs_tail = (struct bfd_link_hash_entry *)
4089 ((char *) pun - ((char *) &h->u.undef.next - (char *) h));
4090 break;
4091 }
4092 }
4093 else
4094 pun = &h->u.undef.next;
4095 }
4096
4097 htab->twiddled_syms = 0;
4098 }
4099 return TRUE;
4100 }
4101
4102 static bfd_boolean
4103 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4104 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4105 {
4106 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4107 char *local_got_tls_masks;
4108
4109 if (local_got_ents == NULL)
4110 {
4111 bfd_size_type size = symtab_hdr->sh_info;
4112
4113 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4114 local_got_ents = bfd_zalloc (abfd, size);
4115 if (local_got_ents == NULL)
4116 return FALSE;
4117 elf_local_got_ents (abfd) = local_got_ents;
4118 }
4119
4120 if ((tls_type & TLS_EXPLICIT) == 0)
4121 {
4122 struct got_entry *ent;
4123
4124 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4125 if (ent->addend == r_addend
4126 && ent->owner == abfd
4127 && ent->tls_type == tls_type)
4128 break;
4129 if (ent == NULL)
4130 {
4131 bfd_size_type amt = sizeof (*ent);
4132 ent = bfd_alloc (abfd, amt);
4133 if (ent == NULL)
4134 return FALSE;
4135 ent->next = local_got_ents[r_symndx];
4136 ent->addend = r_addend;
4137 ent->owner = abfd;
4138 ent->tls_type = tls_type;
4139 ent->got.refcount = 0;
4140 local_got_ents[r_symndx] = ent;
4141 }
4142 ent->got.refcount += 1;
4143 }
4144
4145 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4146 local_got_tls_masks[r_symndx] |= tls_type;
4147 return TRUE;
4148 }
4149
4150 static bfd_boolean
4151 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4152 {
4153 struct plt_entry *ent;
4154
4155 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4156 if (ent->addend == addend)
4157 break;
4158 if (ent == NULL)
4159 {
4160 bfd_size_type amt = sizeof (*ent);
4161 ent = bfd_alloc (abfd, amt);
4162 if (ent == NULL)
4163 return FALSE;
4164 ent->next = eh->elf.plt.plist;
4165 ent->addend = addend;
4166 ent->plt.refcount = 0;
4167 eh->elf.plt.plist = ent;
4168 }
4169 ent->plt.refcount += 1;
4170 eh->elf.needs_plt = 1;
4171 eh->is_func = 1;
4172 return TRUE;
4173 }
4174
4175 /* Look through the relocs for a section during the first phase, and
4176 calculate needed space in the global offset table, procedure
4177 linkage table, and dynamic reloc sections. */
4178
4179 static bfd_boolean
4180 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4181 asection *sec, const Elf_Internal_Rela *relocs)
4182 {
4183 struct ppc_link_hash_table *htab;
4184 Elf_Internal_Shdr *symtab_hdr;
4185 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4186 const Elf_Internal_Rela *rel;
4187 const Elf_Internal_Rela *rel_end;
4188 asection *sreloc;
4189 asection **opd_sym_map;
4190
4191 if (info->relocatable)
4192 return TRUE;
4193
4194 /* Don't do anything special with non-loaded, non-alloced sections.
4195 In particular, any relocs in such sections should not affect GOT
4196 and PLT reference counting (ie. we don't allow them to create GOT
4197 or PLT entries), there's no possibility or desire to optimize TLS
4198 relocs, and there's not much point in propagating relocs to shared
4199 libs that the dynamic linker won't relocate. */
4200 if ((sec->flags & SEC_ALLOC) == 0)
4201 return TRUE;
4202
4203 htab = ppc_hash_table (info);
4204 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4205
4206 sym_hashes = elf_sym_hashes (abfd);
4207 sym_hashes_end = (sym_hashes
4208 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4209 - symtab_hdr->sh_info);
4210
4211 sreloc = NULL;
4212 opd_sym_map = NULL;
4213 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4214 {
4215 /* Garbage collection needs some extra help with .opd sections.
4216 We don't want to necessarily keep everything referenced by
4217 relocs in .opd, as that would keep all functions. Instead,
4218 if we reference an .opd symbol (a function descriptor), we
4219 want to keep the function code symbol's section. This is
4220 easy for global symbols, but for local syms we need to keep
4221 information about the associated function section. Later, if
4222 edit_opd deletes entries, we'll use this array to adjust
4223 local syms in .opd. */
4224 union opd_info {
4225 asection *func_section;
4226 long entry_adjust;
4227 };
4228 bfd_size_type amt;
4229
4230 amt = sec->size * sizeof (union opd_info) / 8;
4231 opd_sym_map = bfd_zalloc (abfd, amt);
4232 if (opd_sym_map == NULL)
4233 return FALSE;
4234 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4235 }
4236
4237 if (htab->sfpr == NULL
4238 && !create_linkage_sections (htab->elf.dynobj, info))
4239 return FALSE;
4240
4241 rel_end = relocs + sec->reloc_count;
4242 for (rel = relocs; rel < rel_end; rel++)
4243 {
4244 unsigned long r_symndx;
4245 struct elf_link_hash_entry *h;
4246 enum elf_ppc64_reloc_type r_type;
4247 int tls_type = 0;
4248
4249 r_symndx = ELF64_R_SYM (rel->r_info);
4250 if (r_symndx < symtab_hdr->sh_info)
4251 h = NULL;
4252 else
4253 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4254
4255 r_type = ELF64_R_TYPE (rel->r_info);
4256 switch (r_type)
4257 {
4258 case R_PPC64_GOT_TLSLD16:
4259 case R_PPC64_GOT_TLSLD16_LO:
4260 case R_PPC64_GOT_TLSLD16_HI:
4261 case R_PPC64_GOT_TLSLD16_HA:
4262 ppc64_tlsld_got (abfd)->refcount += 1;
4263 tls_type = TLS_TLS | TLS_LD;
4264 goto dogottls;
4265
4266 case R_PPC64_GOT_TLSGD16:
4267 case R_PPC64_GOT_TLSGD16_LO:
4268 case R_PPC64_GOT_TLSGD16_HI:
4269 case R_PPC64_GOT_TLSGD16_HA:
4270 tls_type = TLS_TLS | TLS_GD;
4271 goto dogottls;
4272
4273 case R_PPC64_GOT_TPREL16_DS:
4274 case R_PPC64_GOT_TPREL16_LO_DS:
4275 case R_PPC64_GOT_TPREL16_HI:
4276 case R_PPC64_GOT_TPREL16_HA:
4277 if (info->shared)
4278 info->flags |= DF_STATIC_TLS;
4279 tls_type = TLS_TLS | TLS_TPREL;
4280 goto dogottls;
4281
4282 case R_PPC64_GOT_DTPREL16_DS:
4283 case R_PPC64_GOT_DTPREL16_LO_DS:
4284 case R_PPC64_GOT_DTPREL16_HI:
4285 case R_PPC64_GOT_DTPREL16_HA:
4286 tls_type = TLS_TLS | TLS_DTPREL;
4287 dogottls:
4288 sec->has_tls_reloc = 1;
4289 /* Fall thru */
4290
4291 case R_PPC64_GOT16:
4292 case R_PPC64_GOT16_DS:
4293 case R_PPC64_GOT16_HA:
4294 case R_PPC64_GOT16_HI:
4295 case R_PPC64_GOT16_LO:
4296 case R_PPC64_GOT16_LO_DS:
4297 /* This symbol requires a global offset table entry. */
4298 sec->has_toc_reloc = 1;
4299 if (ppc64_elf_tdata (abfd)->got == NULL
4300 && !create_got_section (abfd, info))
4301 return FALSE;
4302
4303 if (h != NULL)
4304 {
4305 struct ppc_link_hash_entry *eh;
4306 struct got_entry *ent;
4307
4308 eh = (struct ppc_link_hash_entry *) h;
4309 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4310 if (ent->addend == rel->r_addend
4311 && ent->owner == abfd
4312 && ent->tls_type == tls_type)
4313 break;
4314 if (ent == NULL)
4315 {
4316 bfd_size_type amt = sizeof (*ent);
4317 ent = bfd_alloc (abfd, amt);
4318 if (ent == NULL)
4319 return FALSE;
4320 ent->next = eh->elf.got.glist;
4321 ent->addend = rel->r_addend;
4322 ent->owner = abfd;
4323 ent->tls_type = tls_type;
4324 ent->got.refcount = 0;
4325 eh->elf.got.glist = ent;
4326 }
4327 ent->got.refcount += 1;
4328 eh->tls_mask |= tls_type;
4329 }
4330 else
4331 /* This is a global offset table entry for a local symbol. */
4332 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4333 rel->r_addend, tls_type))
4334 return FALSE;
4335 break;
4336
4337 case R_PPC64_PLT16_HA:
4338 case R_PPC64_PLT16_HI:
4339 case R_PPC64_PLT16_LO:
4340 case R_PPC64_PLT32:
4341 case R_PPC64_PLT64:
4342 /* This symbol requires a procedure linkage table entry. We
4343 actually build the entry in adjust_dynamic_symbol,
4344 because this might be a case of linking PIC code without
4345 linking in any dynamic objects, in which case we don't
4346 need to generate a procedure linkage table after all. */
4347 if (h == NULL)
4348 {
4349 /* It does not make sense to have a procedure linkage
4350 table entry for a local symbol. */
4351 bfd_set_error (bfd_error_bad_value);
4352 return FALSE;
4353 }
4354 else
4355 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4356 rel->r_addend))
4357 return FALSE;
4358 break;
4359
4360 /* The following relocations don't need to propagate the
4361 relocation if linking a shared object since they are
4362 section relative. */
4363 case R_PPC64_SECTOFF:
4364 case R_PPC64_SECTOFF_LO:
4365 case R_PPC64_SECTOFF_HI:
4366 case R_PPC64_SECTOFF_HA:
4367 case R_PPC64_SECTOFF_DS:
4368 case R_PPC64_SECTOFF_LO_DS:
4369 case R_PPC64_DTPREL16:
4370 case R_PPC64_DTPREL16_LO:
4371 case R_PPC64_DTPREL16_HI:
4372 case R_PPC64_DTPREL16_HA:
4373 case R_PPC64_DTPREL16_DS:
4374 case R_PPC64_DTPREL16_LO_DS:
4375 case R_PPC64_DTPREL16_HIGHER:
4376 case R_PPC64_DTPREL16_HIGHERA:
4377 case R_PPC64_DTPREL16_HIGHEST:
4378 case R_PPC64_DTPREL16_HIGHESTA:
4379 break;
4380
4381 /* Nor do these. */
4382 case R_PPC64_TOC16:
4383 case R_PPC64_TOC16_LO:
4384 case R_PPC64_TOC16_HI:
4385 case R_PPC64_TOC16_HA:
4386 case R_PPC64_TOC16_DS:
4387 case R_PPC64_TOC16_LO_DS:
4388 sec->has_toc_reloc = 1;
4389 break;
4390
4391 /* This relocation describes the C++ object vtable hierarchy.
4392 Reconstruct it for later use during GC. */
4393 case R_PPC64_GNU_VTINHERIT:
4394 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4395 return FALSE;
4396 break;
4397
4398 /* This relocation describes which C++ vtable entries are actually
4399 used. Record for later use during GC. */
4400 case R_PPC64_GNU_VTENTRY:
4401 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4402 return FALSE;
4403 break;
4404
4405 case R_PPC64_REL14:
4406 case R_PPC64_REL14_BRTAKEN:
4407 case R_PPC64_REL14_BRNTAKEN:
4408 htab->has_14bit_branch = 1;
4409 /* Fall through. */
4410
4411 case R_PPC64_REL24:
4412 if (h != NULL)
4413 {
4414 /* We may need a .plt entry if the function this reloc
4415 refers to is in a shared lib. */
4416 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4417 rel->r_addend))
4418 return FALSE;
4419 if (h == &htab->tls_get_addr->elf
4420 || h == &htab->tls_get_addr_fd->elf)
4421 sec->has_tls_reloc = 1;
4422 else if (htab->tls_get_addr == NULL
4423 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4424 && (h->root.root.string[15] == 0
4425 || h->root.root.string[15] == '@'))
4426 {
4427 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4428 sec->has_tls_reloc = 1;
4429 }
4430 else if (htab->tls_get_addr_fd == NULL
4431 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4432 && (h->root.root.string[14] == 0
4433 || h->root.root.string[14] == '@'))
4434 {
4435 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4436 sec->has_tls_reloc = 1;
4437 }
4438 }
4439 break;
4440
4441 case R_PPC64_TPREL64:
4442 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4443 if (info->shared)
4444 info->flags |= DF_STATIC_TLS;
4445 goto dotlstoc;
4446
4447 case R_PPC64_DTPMOD64:
4448 if (rel + 1 < rel_end
4449 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4450 && rel[1].r_offset == rel->r_offset + 8)
4451 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4452 else
4453 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4454 goto dotlstoc;
4455
4456 case R_PPC64_DTPREL64:
4457 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4458 if (rel != relocs
4459 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4460 && rel[-1].r_offset == rel->r_offset - 8)
4461 /* This is the second reloc of a dtpmod, dtprel pair.
4462 Don't mark with TLS_DTPREL. */
4463 goto dodyn;
4464
4465 dotlstoc:
4466 sec->has_tls_reloc = 1;
4467 if (h != NULL)
4468 {
4469 struct ppc_link_hash_entry *eh;
4470 eh = (struct ppc_link_hash_entry *) h;
4471 eh->tls_mask |= tls_type;
4472 }
4473 else
4474 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4475 rel->r_addend, tls_type))
4476 return FALSE;
4477
4478 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4479 {
4480 /* One extra to simplify get_tls_mask. */
4481 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4482 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4483 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4484 return FALSE;
4485 }
4486 BFD_ASSERT (rel->r_offset % 8 == 0);
4487 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4488
4489 /* Mark the second slot of a GD or LD entry.
4490 -1 to indicate GD and -2 to indicate LD. */
4491 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4492 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4493 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4494 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4495 goto dodyn;
4496
4497 case R_PPC64_TPREL16:
4498 case R_PPC64_TPREL16_LO:
4499 case R_PPC64_TPREL16_HI:
4500 case R_PPC64_TPREL16_HA:
4501 case R_PPC64_TPREL16_DS:
4502 case R_PPC64_TPREL16_LO_DS:
4503 case R_PPC64_TPREL16_HIGHER:
4504 case R_PPC64_TPREL16_HIGHERA:
4505 case R_PPC64_TPREL16_HIGHEST:
4506 case R_PPC64_TPREL16_HIGHESTA:
4507 if (info->shared)
4508 {
4509 info->flags |= DF_STATIC_TLS;
4510 goto dodyn;
4511 }
4512 break;
4513
4514 case R_PPC64_ADDR64:
4515 if (opd_sym_map != NULL
4516 && rel + 1 < rel_end
4517 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4518 {
4519 if (h != NULL)
4520 {
4521 if (h->root.root.string[0] == '.'
4522 && h->root.root.string[1] != 0
4523 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4524 ;
4525 else
4526 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4527 }
4528 else
4529 {
4530 asection *s;
4531
4532 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4533 r_symndx);
4534 if (s == NULL)
4535 return FALSE;
4536 else if (s != sec)
4537 opd_sym_map[rel->r_offset / 8] = s;
4538 }
4539 }
4540 /* Fall through. */
4541
4542 case R_PPC64_REL30:
4543 case R_PPC64_REL32:
4544 case R_PPC64_REL64:
4545 case R_PPC64_ADDR14:
4546 case R_PPC64_ADDR14_BRNTAKEN:
4547 case R_PPC64_ADDR14_BRTAKEN:
4548 case R_PPC64_ADDR16:
4549 case R_PPC64_ADDR16_DS:
4550 case R_PPC64_ADDR16_HA:
4551 case R_PPC64_ADDR16_HI:
4552 case R_PPC64_ADDR16_HIGHER:
4553 case R_PPC64_ADDR16_HIGHERA:
4554 case R_PPC64_ADDR16_HIGHEST:
4555 case R_PPC64_ADDR16_HIGHESTA:
4556 case R_PPC64_ADDR16_LO:
4557 case R_PPC64_ADDR16_LO_DS:
4558 case R_PPC64_ADDR24:
4559 case R_PPC64_ADDR32:
4560 case R_PPC64_UADDR16:
4561 case R_PPC64_UADDR32:
4562 case R_PPC64_UADDR64:
4563 case R_PPC64_TOC:
4564 if (h != NULL && !info->shared)
4565 /* We may need a copy reloc. */
4566 h->non_got_ref = 1;
4567
4568 /* Don't propagate .opd relocs. */
4569 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4570 break;
4571
4572 /* If we are creating a shared library, and this is a reloc
4573 against a global symbol, or a non PC relative reloc
4574 against a local symbol, then we need to copy the reloc
4575 into the shared library. However, if we are linking with
4576 -Bsymbolic, we do not need to copy a reloc against a
4577 global symbol which is defined in an object we are
4578 including in the link (i.e., DEF_REGULAR is set). At
4579 this point we have not seen all the input files, so it is
4580 possible that DEF_REGULAR is not set now but will be set
4581 later (it is never cleared). In case of a weak definition,
4582 DEF_REGULAR may be cleared later by a strong definition in
4583 a shared library. We account for that possibility below by
4584 storing information in the dyn_relocs field of the hash
4585 table entry. A similar situation occurs when creating
4586 shared libraries and symbol visibility changes render the
4587 symbol local.
4588
4589 If on the other hand, we are creating an executable, we
4590 may need to keep relocations for symbols satisfied by a
4591 dynamic library if we manage to avoid copy relocs for the
4592 symbol. */
4593 dodyn:
4594 if ((info->shared
4595 && (MUST_BE_DYN_RELOC (r_type)
4596 || (h != NULL
4597 && (! info->symbolic
4598 || h->root.type == bfd_link_hash_defweak
4599 || !h->def_regular))))
4600 || (ELIMINATE_COPY_RELOCS
4601 && !info->shared
4602 && h != NULL
4603 && (h->root.type == bfd_link_hash_defweak
4604 || !h->def_regular)))
4605 {
4606 struct ppc_dyn_relocs *p;
4607 struct ppc_dyn_relocs **head;
4608
4609 /* We must copy these reloc types into the output file.
4610 Create a reloc section in dynobj and make room for
4611 this reloc. */
4612 if (sreloc == NULL)
4613 {
4614 const char *name;
4615 bfd *dynobj;
4616
4617 name = (bfd_elf_string_from_elf_section
4618 (abfd,
4619 elf_elfheader (abfd)->e_shstrndx,
4620 elf_section_data (sec)->rel_hdr.sh_name));
4621 if (name == NULL)
4622 return FALSE;
4623
4624 if (strncmp (name, ".rela", 5) != 0
4625 || strcmp (bfd_get_section_name (abfd, sec),
4626 name + 5) != 0)
4627 {
4628 (*_bfd_error_handler)
4629 (_("%B: bad relocation section name `%s\'"),
4630 abfd, name);
4631 bfd_set_error (bfd_error_bad_value);
4632 }
4633
4634 dynobj = htab->elf.dynobj;
4635 sreloc = bfd_get_section_by_name (dynobj, name);
4636 if (sreloc == NULL)
4637 {
4638 flagword flags;
4639
4640 sreloc = bfd_make_section (dynobj, name);
4641 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4642 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4643 if ((sec->flags & SEC_ALLOC) != 0)
4644 flags |= SEC_ALLOC | SEC_LOAD;
4645 if (sreloc == NULL
4646 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4647 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4648 return FALSE;
4649 }
4650 elf_section_data (sec)->sreloc = sreloc;
4651 }
4652
4653 /* If this is a global symbol, we count the number of
4654 relocations we need for this symbol. */
4655 if (h != NULL)
4656 {
4657 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4658 }
4659 else
4660 {
4661 /* Track dynamic relocs needed for local syms too.
4662 We really need local syms available to do this
4663 easily. Oh well. */
4664
4665 asection *s;
4666 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4667 sec, r_symndx);
4668 if (s == NULL)
4669 return FALSE;
4670
4671 head = ((struct ppc_dyn_relocs **)
4672 &elf_section_data (s)->local_dynrel);
4673 }
4674
4675 p = *head;
4676 if (p == NULL || p->sec != sec)
4677 {
4678 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4679 if (p == NULL)
4680 return FALSE;
4681 p->next = *head;
4682 *head = p;
4683 p->sec = sec;
4684 p->count = 0;
4685 p->pc_count = 0;
4686 }
4687
4688 p->count += 1;
4689 if (!MUST_BE_DYN_RELOC (r_type))
4690 p->pc_count += 1;
4691 }
4692 break;
4693
4694 default:
4695 break;
4696 }
4697 }
4698
4699 return TRUE;
4700 }
4701
4702 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4703 of the code entry point, and its section. */
4704
4705 static bfd_vma
4706 opd_entry_value (asection *opd_sec,
4707 bfd_vma offset,
4708 asection **code_sec,
4709 bfd_vma *code_off)
4710 {
4711 bfd *opd_bfd = opd_sec->owner;
4712 Elf_Internal_Rela *relocs;
4713 Elf_Internal_Rela *lo, *hi, *look;
4714 bfd_vma val;
4715
4716 /* No relocs implies we are linking a --just-symbols object. */
4717 if (opd_sec->reloc_count == 0)
4718 {
4719 bfd_vma val;
4720
4721 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4722 return (bfd_vma) -1;
4723
4724 if (code_sec != NULL)
4725 {
4726 asection *sec, *likely = NULL;
4727 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4728 if (sec->vma <= val
4729 && (sec->flags & SEC_LOAD) != 0
4730 && (sec->flags & SEC_ALLOC) != 0)
4731 likely = sec;
4732 if (likely != NULL)
4733 {
4734 *code_sec = likely;
4735 if (code_off != NULL)
4736 *code_off = val - likely->vma;
4737 }
4738 }
4739 return val;
4740 }
4741
4742 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4743 if (relocs == NULL)
4744 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4745
4746 /* Go find the opd reloc at the sym address. */
4747 lo = relocs;
4748 BFD_ASSERT (lo != NULL);
4749 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4750 val = (bfd_vma) -1;
4751 while (lo < hi)
4752 {
4753 look = lo + (hi - lo) / 2;
4754 if (look->r_offset < offset)
4755 lo = look + 1;
4756 else if (look->r_offset > offset)
4757 hi = look;
4758 else
4759 {
4760 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4761 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4762 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4763 {
4764 unsigned long symndx = ELF64_R_SYM (look->r_info);
4765 asection *sec;
4766
4767 if (symndx < symtab_hdr->sh_info)
4768 {
4769 Elf_Internal_Sym *sym;
4770
4771 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4772 if (sym == NULL)
4773 {
4774 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4775 symtab_hdr->sh_info,
4776 0, NULL, NULL, NULL);
4777 if (sym == NULL)
4778 break;
4779 symtab_hdr->contents = (bfd_byte *) sym;
4780 }
4781
4782 sym += symndx;
4783 val = sym->st_value;
4784 sec = NULL;
4785 if ((sym->st_shndx != SHN_UNDEF
4786 && sym->st_shndx < SHN_LORESERVE)
4787 || sym->st_shndx > SHN_HIRESERVE)
4788 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4789 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4790 }
4791 else
4792 {
4793 struct elf_link_hash_entry **sym_hashes;
4794 struct elf_link_hash_entry *rh;
4795
4796 sym_hashes = elf_sym_hashes (opd_bfd);
4797 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4798 while (rh->root.type == bfd_link_hash_indirect
4799 || rh->root.type == bfd_link_hash_warning)
4800 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4801 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4802 || rh->root.type == bfd_link_hash_defweak);
4803 val = rh->root.u.def.value;
4804 sec = rh->root.u.def.section;
4805 }
4806 val += look->r_addend;
4807 if (code_off != NULL)
4808 *code_off = val;
4809 if (code_sec != NULL)
4810 *code_sec = sec;
4811 if (sec != NULL && sec->output_section != NULL)
4812 val += sec->output_section->vma + sec->output_offset;
4813 }
4814 break;
4815 }
4816 }
4817
4818 return val;
4819 }
4820
4821 /* Return the section that should be marked against GC for a given
4822 relocation. */
4823
4824 static asection *
4825 ppc64_elf_gc_mark_hook (asection *sec,
4826 struct bfd_link_info *info,
4827 Elf_Internal_Rela *rel,
4828 struct elf_link_hash_entry *h,
4829 Elf_Internal_Sym *sym)
4830 {
4831 asection *rsec;
4832
4833 /* First mark all our entry sym sections. */
4834 if (info->gc_sym_list != NULL)
4835 {
4836 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4837 struct bfd_sym_chain *sym = info->gc_sym_list;
4838
4839 info->gc_sym_list = NULL;
4840 do
4841 {
4842 struct ppc_link_hash_entry *eh;
4843
4844 eh = (struct ppc_link_hash_entry *)
4845 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4846 if (eh == NULL)
4847 continue;
4848 if (eh->elf.root.type != bfd_link_hash_defined
4849 && eh->elf.root.type != bfd_link_hash_defweak)
4850 continue;
4851
4852 if (eh->is_func_descriptor)
4853 rsec = eh->oh->elf.root.u.def.section;
4854 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4855 && opd_entry_value (eh->elf.root.u.def.section,
4856 eh->elf.root.u.def.value,
4857 &rsec, NULL) != (bfd_vma) -1)
4858 ;
4859 else
4860 continue;
4861
4862 if (!rsec->gc_mark)
4863 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4864
4865 rsec = eh->elf.root.u.def.section;
4866 if (!rsec->gc_mark)
4867 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4868
4869 sym = sym->next;
4870 }
4871 while (sym != NULL);
4872 }
4873
4874 /* Syms return NULL if we're marking .opd, so we avoid marking all
4875 function sections, as all functions are referenced in .opd. */
4876 rsec = NULL;
4877 if (get_opd_info (sec) != NULL)
4878 return rsec;
4879
4880 if (h != NULL)
4881 {
4882 enum elf_ppc64_reloc_type r_type;
4883 struct ppc_link_hash_entry *eh;
4884
4885 r_type = ELF64_R_TYPE (rel->r_info);
4886 switch (r_type)
4887 {
4888 case R_PPC64_GNU_VTINHERIT:
4889 case R_PPC64_GNU_VTENTRY:
4890 break;
4891
4892 default:
4893 switch (h->root.type)
4894 {
4895 case bfd_link_hash_defined:
4896 case bfd_link_hash_defweak:
4897 eh = (struct ppc_link_hash_entry *) h;
4898 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4899 eh = eh->oh;
4900
4901 /* Function descriptor syms cause the associated
4902 function code sym section to be marked. */
4903 if (eh->is_func_descriptor)
4904 {
4905 /* They also mark their opd section. */
4906 if (!eh->elf.root.u.def.section->gc_mark)
4907 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4908 ppc64_elf_gc_mark_hook);
4909
4910 rsec = eh->oh->elf.root.u.def.section;
4911 }
4912 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4913 && opd_entry_value (eh->elf.root.u.def.section,
4914 eh->elf.root.u.def.value,
4915 &rsec, NULL) != (bfd_vma) -1)
4916 {
4917 if (!eh->elf.root.u.def.section->gc_mark)
4918 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4919 ppc64_elf_gc_mark_hook);
4920 }
4921 else
4922 rsec = h->root.u.def.section;
4923 break;
4924
4925 case bfd_link_hash_common:
4926 rsec = h->root.u.c.p->section;
4927 break;
4928
4929 default:
4930 break;
4931 }
4932 }
4933 }
4934 else
4935 {
4936 asection **opd_sym_section;
4937
4938 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4939 opd_sym_section = get_opd_info (rsec);
4940 if (opd_sym_section != NULL)
4941 {
4942 if (!rsec->gc_mark)
4943 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4944
4945 rsec = opd_sym_section[sym->st_value / 8];
4946 }
4947 }
4948
4949 return rsec;
4950 }
4951
4952 /* Update the .got, .plt. and dynamic reloc reference counts for the
4953 section being removed. */
4954
4955 static bfd_boolean
4956 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4957 asection *sec, const Elf_Internal_Rela *relocs)
4958 {
4959 struct ppc_link_hash_table *htab;
4960 Elf_Internal_Shdr *symtab_hdr;
4961 struct elf_link_hash_entry **sym_hashes;
4962 struct got_entry **local_got_ents;
4963 const Elf_Internal_Rela *rel, *relend;
4964
4965 if ((sec->flags & SEC_ALLOC) == 0)
4966 return TRUE;
4967
4968 elf_section_data (sec)->local_dynrel = NULL;
4969
4970 htab = ppc_hash_table (info);
4971 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4972 sym_hashes = elf_sym_hashes (abfd);
4973 local_got_ents = elf_local_got_ents (abfd);
4974
4975 relend = relocs + sec->reloc_count;
4976 for (rel = relocs; rel < relend; rel++)
4977 {
4978 unsigned long r_symndx;
4979 enum elf_ppc64_reloc_type r_type;
4980 struct elf_link_hash_entry *h = NULL;
4981 char tls_type = 0;
4982
4983 r_symndx = ELF64_R_SYM (rel->r_info);
4984 r_type = ELF64_R_TYPE (rel->r_info);
4985 if (r_symndx >= symtab_hdr->sh_info)
4986 {
4987 struct ppc_link_hash_entry *eh;
4988 struct ppc_dyn_relocs **pp;
4989 struct ppc_dyn_relocs *p;
4990
4991 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4992 eh = (struct ppc_link_hash_entry *) h;
4993
4994 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4995 if (p->sec == sec)
4996 {
4997 /* Everything must go for SEC. */
4998 *pp = p->next;
4999 break;
5000 }
5001 }
5002
5003 switch (r_type)
5004 {
5005 case R_PPC64_GOT_TLSLD16:
5006 case R_PPC64_GOT_TLSLD16_LO:
5007 case R_PPC64_GOT_TLSLD16_HI:
5008 case R_PPC64_GOT_TLSLD16_HA:
5009 ppc64_tlsld_got (abfd)->refcount -= 1;
5010 tls_type = TLS_TLS | TLS_LD;
5011 goto dogot;
5012
5013 case R_PPC64_GOT_TLSGD16:
5014 case R_PPC64_GOT_TLSGD16_LO:
5015 case R_PPC64_GOT_TLSGD16_HI:
5016 case R_PPC64_GOT_TLSGD16_HA:
5017 tls_type = TLS_TLS | TLS_GD;
5018 goto dogot;
5019
5020 case R_PPC64_GOT_TPREL16_DS:
5021 case R_PPC64_GOT_TPREL16_LO_DS:
5022 case R_PPC64_GOT_TPREL16_HI:
5023 case R_PPC64_GOT_TPREL16_HA:
5024 tls_type = TLS_TLS | TLS_TPREL;
5025 goto dogot;
5026
5027 case R_PPC64_GOT_DTPREL16_DS:
5028 case R_PPC64_GOT_DTPREL16_LO_DS:
5029 case R_PPC64_GOT_DTPREL16_HI:
5030 case R_PPC64_GOT_DTPREL16_HA:
5031 tls_type = TLS_TLS | TLS_DTPREL;
5032 goto dogot;
5033
5034 case R_PPC64_GOT16:
5035 case R_PPC64_GOT16_DS:
5036 case R_PPC64_GOT16_HA:
5037 case R_PPC64_GOT16_HI:
5038 case R_PPC64_GOT16_LO:
5039 case R_PPC64_GOT16_LO_DS:
5040 dogot:
5041 {
5042 struct got_entry *ent;
5043
5044 if (h != NULL)
5045 ent = h->got.glist;
5046 else
5047 ent = local_got_ents[r_symndx];
5048
5049 for (; ent != NULL; ent = ent->next)
5050 if (ent->addend == rel->r_addend
5051 && ent->owner == abfd
5052 && ent->tls_type == tls_type)
5053 break;
5054 if (ent == NULL)
5055 abort ();
5056 if (ent->got.refcount > 0)
5057 ent->got.refcount -= 1;
5058 }
5059 break;
5060
5061 case R_PPC64_PLT16_HA:
5062 case R_PPC64_PLT16_HI:
5063 case R_PPC64_PLT16_LO:
5064 case R_PPC64_PLT32:
5065 case R_PPC64_PLT64:
5066 case R_PPC64_REL14:
5067 case R_PPC64_REL14_BRNTAKEN:
5068 case R_PPC64_REL14_BRTAKEN:
5069 case R_PPC64_REL24:
5070 if (h != NULL)
5071 {
5072 struct plt_entry *ent;
5073
5074 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5075 if (ent->addend == rel->r_addend)
5076 break;
5077 if (ent == NULL)
5078 abort ();
5079 if (ent->plt.refcount > 0)
5080 ent->plt.refcount -= 1;
5081 }
5082 break;
5083
5084 default:
5085 break;
5086 }
5087 }
5088 return TRUE;
5089 }
5090
5091 /* The maximum size of .sfpr. */
5092 #define SFPR_MAX (218*4)
5093
5094 struct sfpr_def_parms
5095 {
5096 const char name[12];
5097 unsigned char lo, hi;
5098 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5099 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5100 };
5101
5102 /* Auto-generate _save*, _rest* functions in .sfpr. */
5103
5104 static unsigned int
5105 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5106 {
5107 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5108 unsigned int i;
5109 size_t len = strlen (parm->name);
5110 bfd_boolean writing = FALSE;
5111 char sym[16];
5112
5113 memcpy (sym, parm->name, len);
5114 sym[len + 2] = 0;
5115
5116 for (i = parm->lo; i <= parm->hi; i++)
5117 {
5118 struct elf_link_hash_entry *h;
5119
5120 sym[len + 0] = i / 10 + '0';
5121 sym[len + 1] = i % 10 + '0';
5122 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5123 if (h != NULL
5124 && !h->def_regular)
5125 {
5126 h->root.type = bfd_link_hash_defined;
5127 h->root.u.def.section = htab->sfpr;
5128 h->root.u.def.value = htab->sfpr->size;
5129 h->type = STT_FUNC;
5130 h->def_regular = 1;
5131 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5132 writing = TRUE;
5133 if (htab->sfpr->contents == NULL)
5134 {
5135 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5136 if (htab->sfpr->contents == NULL)
5137 return FALSE;
5138 }
5139 }
5140 if (writing)
5141 {
5142 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5143 if (i != parm->hi)
5144 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5145 else
5146 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5147 htab->sfpr->size = p - htab->sfpr->contents;
5148 }
5149 }
5150
5151 return TRUE;
5152 }
5153
5154 static bfd_byte *
5155 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5156 {
5157 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5158 return p + 4;
5159 }
5160
5161 static bfd_byte *
5162 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5163 {
5164 p = savegpr0 (abfd, p, r);
5165 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5166 p = p + 4;
5167 bfd_put_32 (abfd, BLR, p);
5168 return p + 4;
5169 }
5170
5171 static bfd_byte *
5172 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5173 {
5174 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5175 return p + 4;
5176 }
5177
5178 static bfd_byte *
5179 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5180 {
5181 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5182 p = p + 4;
5183 p = restgpr0 (abfd, p, r);
5184 bfd_put_32 (abfd, MTLR_R0, p);
5185 p = p + 4;
5186 if (r == 29)
5187 {
5188 p = restgpr0 (abfd, p, 30);
5189 p = restgpr0 (abfd, p, 31);
5190 }
5191 bfd_put_32 (abfd, BLR, p);
5192 return p + 4;
5193 }
5194
5195 static bfd_byte *
5196 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5197 {
5198 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5199 return p + 4;
5200 }
5201
5202 static bfd_byte *
5203 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5204 {
5205 p = savegpr1 (abfd, p, r);
5206 bfd_put_32 (abfd, BLR, p);
5207 return p + 4;
5208 }
5209
5210 static bfd_byte *
5211 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5212 {
5213 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5214 return p + 4;
5215 }
5216
5217 static bfd_byte *
5218 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5219 {
5220 p = restgpr1 (abfd, p, r);
5221 bfd_put_32 (abfd, BLR, p);
5222 return p + 4;
5223 }
5224
5225 static bfd_byte *
5226 savefpr (bfd *abfd, bfd_byte *p, int r)
5227 {
5228 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5229 return p + 4;
5230 }
5231
5232 static bfd_byte *
5233 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5234 {
5235 p = savefpr (abfd, p, r);
5236 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5237 p = p + 4;
5238 bfd_put_32 (abfd, BLR, p);
5239 return p + 4;
5240 }
5241
5242 static bfd_byte *
5243 restfpr (bfd *abfd, bfd_byte *p, int r)
5244 {
5245 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5246 return p + 4;
5247 }
5248
5249 static bfd_byte *
5250 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5251 {
5252 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5253 p = p + 4;
5254 p = restfpr (abfd, p, r);
5255 bfd_put_32 (abfd, MTLR_R0, p);
5256 p = p + 4;
5257 if (r == 29)
5258 {
5259 p = restfpr (abfd, p, 30);
5260 p = restfpr (abfd, p, 31);
5261 }
5262 bfd_put_32 (abfd, BLR, p);
5263 return p + 4;
5264 }
5265
5266 static bfd_byte *
5267 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5268 {
5269 p = savefpr (abfd, p, r);
5270 bfd_put_32 (abfd, BLR, p);
5271 return p + 4;
5272 }
5273
5274 static bfd_byte *
5275 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5276 {
5277 p = restfpr (abfd, p, r);
5278 bfd_put_32 (abfd, BLR, p);
5279 return p + 4;
5280 }
5281
5282 static bfd_byte *
5283 savevr (bfd *abfd, bfd_byte *p, int r)
5284 {
5285 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5286 p = p + 4;
5287 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5288 return p + 4;
5289 }
5290
5291 static bfd_byte *
5292 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5293 {
5294 p = savevr (abfd, p, r);
5295 bfd_put_32 (abfd, BLR, p);
5296 return p + 4;
5297 }
5298
5299 static bfd_byte *
5300 restvr (bfd *abfd, bfd_byte *p, int r)
5301 {
5302 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5303 p = p + 4;
5304 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5305 return p + 4;
5306 }
5307
5308 static bfd_byte *
5309 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5310 {
5311 p = restvr (abfd, p, r);
5312 bfd_put_32 (abfd, BLR, p);
5313 return p + 4;
5314 }
5315
5316 /* Called via elf_link_hash_traverse to transfer dynamic linking
5317 information on function code symbol entries to their corresponding
5318 function descriptor symbol entries. */
5319
5320 static bfd_boolean
5321 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5322 {
5323 struct bfd_link_info *info;
5324 struct ppc_link_hash_table *htab;
5325 struct plt_entry *ent;
5326 struct ppc_link_hash_entry *fh;
5327 struct ppc_link_hash_entry *fdh;
5328 bfd_boolean force_local;
5329
5330 fh = (struct ppc_link_hash_entry *) h;
5331 if (fh->elf.root.type == bfd_link_hash_indirect)
5332 return TRUE;
5333
5334 if (fh->elf.root.type == bfd_link_hash_warning)
5335 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5336
5337 info = inf;
5338 htab = ppc_hash_table (info);
5339
5340 /* Resolve undefined references to dot-symbols as the value
5341 in the function descriptor, if we have one in a regular object.
5342 This is to satisfy cases like ".quad .foo". Calls to functions
5343 in dynamic objects are handled elsewhere. */
5344 if (fh->elf.root.type == bfd_link_hash_undefweak
5345 && fh->was_undefined
5346 && (fh->oh->elf.root.type == bfd_link_hash_defined
5347 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5348 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5349 && opd_entry_value (fh->oh->elf.root.u.def.section,
5350 fh->oh->elf.root.u.def.value,
5351 &fh->elf.root.u.def.section,
5352 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5353 {
5354 fh->elf.root.type = fh->oh->elf.root.type;
5355 fh->elf.forced_local = 1;
5356 }
5357
5358 /* If this is a function code symbol, transfer dynamic linking
5359 information to the function descriptor symbol. */
5360 if (!fh->is_func)
5361 return TRUE;
5362
5363 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5364 if (ent->plt.refcount > 0)
5365 break;
5366 if (ent == NULL
5367 || fh->elf.root.root.string[0] != '.'
5368 || fh->elf.root.root.string[1] == '\0')
5369 return TRUE;
5370
5371 /* Find the corresponding function descriptor symbol. Create it
5372 as undefined if necessary. */
5373
5374 fdh = get_fdh (fh, htab);
5375 if (fdh != NULL)
5376 while (fdh->elf.root.type == bfd_link_hash_indirect
5377 || fdh->elf.root.type == bfd_link_hash_warning)
5378 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5379
5380 if (fdh == NULL
5381 && info->shared
5382 && (fh->elf.root.type == bfd_link_hash_undefined
5383 || fh->elf.root.type == bfd_link_hash_undefweak))
5384 {
5385 bfd *abfd;
5386 asymbol *newsym;
5387 struct bfd_link_hash_entry *bh;
5388
5389 abfd = fh->elf.root.u.undef.abfd;
5390 newsym = bfd_make_empty_symbol (abfd);
5391 newsym->name = fh->elf.root.root.string + 1;
5392 newsym->section = bfd_und_section_ptr;
5393 newsym->value = 0;
5394 newsym->flags = BSF_OBJECT;
5395 if (fh->elf.root.type == bfd_link_hash_undefweak)
5396 newsym->flags |= BSF_WEAK;
5397
5398 bh = &fdh->elf.root;
5399 if ( !(_bfd_generic_link_add_one_symbol
5400 (info, abfd, newsym->name, newsym->flags,
5401 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
5402 {
5403 return FALSE;
5404 }
5405 fdh = (struct ppc_link_hash_entry *) bh;
5406 fdh->elf.non_elf = 0;
5407 fdh->elf.size = 24;
5408 fdh->elf.type = STT_OBJECT;
5409 }
5410
5411 if (fdh != NULL
5412 && !fdh->elf.forced_local
5413 && (info->shared
5414 || fdh->elf.def_dynamic
5415 || fdh->elf.ref_dynamic
5416 || (fdh->elf.root.type == bfd_link_hash_undefweak
5417 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5418 {
5419 if (fdh->elf.dynindx == -1)
5420 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5421 return FALSE;
5422 fdh->elf.ref_regular |= fh->elf.ref_regular;
5423 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5424 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5425 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5426 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5427 {
5428 struct plt_entry **ep = &fdh->elf.plt.plist;
5429 while (*ep != NULL)
5430 ep = &(*ep)->next;
5431 *ep = fh->elf.plt.plist;
5432 fh->elf.plt.plist = NULL;
5433 fdh->elf.needs_plt = 1;
5434 }
5435 fdh->is_func_descriptor = 1;
5436 fdh->oh = fh;
5437 fh->oh = fdh;
5438 }
5439
5440 /* Now that the info is on the function descriptor, clear the
5441 function code sym info. Any function code syms for which we
5442 don't have a definition in a regular file, we force local.
5443 This prevents a shared library from exporting syms that have
5444 been imported from another library. Function code syms that
5445 are really in the library we must leave global to prevent the
5446 linker dragging in a definition from a static library. */
5447 force_local
5448 = (info->shared
5449 && (!fh->elf.def_regular
5450 || fdh == NULL
5451 || !fdh->elf.def_regular
5452 || fdh->elf.forced_local));
5453 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5454
5455 return TRUE;
5456 }
5457
5458 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5459 this hook to a) provide some gcc support functions, and b) transfer
5460 dynamic linking information gathered so far on function code symbol
5461 entries, to their corresponding function descriptor symbol entries. */
5462
5463 static bfd_boolean
5464 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5465 struct bfd_link_info *info)
5466 {
5467 struct ppc_link_hash_table *htab;
5468 unsigned int i;
5469 const struct sfpr_def_parms funcs[] =
5470 {
5471 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5472 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5473 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5474 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5475 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5476 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5477 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5478 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5479 { "._savef", 14, 31, savefpr, savefpr1_tail },
5480 { "._restf", 14, 31, restfpr, restfpr1_tail },
5481 { "_savevr_", 20, 31, savevr, savevr_tail },
5482 { "_restvr_", 20, 31, restvr, restvr_tail }
5483 };
5484
5485 htab = ppc_hash_table (info);
5486 if (htab->sfpr == NULL)
5487 /* We don't have any relocs. */
5488 return TRUE;
5489
5490 /* Provide any missing _save* and _rest* functions. */
5491 htab->sfpr->size = 0;
5492 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5493 if (!sfpr_define (info, &funcs[i]))
5494 return FALSE;
5495
5496 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5497
5498 if (htab->sfpr->size == 0)
5499 _bfd_strip_section_from_output (info, htab->sfpr);
5500
5501 return TRUE;
5502 }
5503
5504 /* Adjust a symbol defined by a dynamic object and referenced by a
5505 regular object. The current definition is in some section of the
5506 dynamic object, but we're not including those sections. We have to
5507 change the definition to something the rest of the link can
5508 understand. */
5509
5510 static bfd_boolean
5511 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5512 struct elf_link_hash_entry *h)
5513 {
5514 struct ppc_link_hash_table *htab;
5515 asection *s;
5516 unsigned int power_of_two;
5517
5518 htab = ppc_hash_table (info);
5519
5520 /* Deal with function syms. */
5521 if (h->type == STT_FUNC
5522 || h->needs_plt)
5523 {
5524 /* Clear procedure linkage table information for any symbol that
5525 won't need a .plt entry. */
5526 struct plt_entry *ent;
5527 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5528 if (ent->plt.refcount > 0)
5529 break;
5530 if (ent == NULL
5531 || SYMBOL_CALLS_LOCAL (info, h)
5532 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5533 && h->root.type == bfd_link_hash_undefweak))
5534 {
5535 h->plt.plist = NULL;
5536 h->needs_plt = 0;
5537 }
5538 }
5539 else
5540 h->plt.plist = NULL;
5541
5542 /* If this is a weak symbol, and there is a real definition, the
5543 processor independent code will have arranged for us to see the
5544 real definition first, and we can just use the same value. */
5545 if (h->u.weakdef != NULL)
5546 {
5547 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5548 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5549 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5550 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5551 if (ELIMINATE_COPY_RELOCS)
5552 h->non_got_ref = h->u.weakdef->non_got_ref;
5553 return TRUE;
5554 }
5555
5556 /* If we are creating a shared library, we must presume that the
5557 only references to the symbol are via the global offset table.
5558 For such cases we need not do anything here; the relocations will
5559 be handled correctly by relocate_section. */
5560 if (info->shared)
5561 return TRUE;
5562
5563 /* If there are no references to this symbol that do not use the
5564 GOT, we don't need to generate a copy reloc. */
5565 if (!h->non_got_ref)
5566 return TRUE;
5567
5568 if (ELIMINATE_COPY_RELOCS)
5569 {
5570 struct ppc_link_hash_entry * eh;
5571 struct ppc_dyn_relocs *p;
5572
5573 eh = (struct ppc_link_hash_entry *) h;
5574 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5575 {
5576 s = p->sec->output_section;
5577 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5578 break;
5579 }
5580
5581 /* If we didn't find any dynamic relocs in read-only sections, then
5582 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5583 if (p == NULL)
5584 {
5585 h->non_got_ref = 0;
5586 return TRUE;
5587 }
5588 }
5589
5590 if (h->plt.plist != NULL)
5591 {
5592 /* We should never get here, but unfortunately there are versions
5593 of gcc out there that improperly (for this ABI) put initialized
5594 function pointers, vtable refs and suchlike in read-only
5595 sections. Allow them to proceed, but warn that this might
5596 break at runtime. */
5597 (*_bfd_error_handler)
5598 (_("copy reloc against `%s' requires lazy plt linking; "
5599 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5600 h->root.root.string);
5601 }
5602
5603 /* This is a reference to a symbol defined by a dynamic object which
5604 is not a function. */
5605
5606 /* We must allocate the symbol in our .dynbss section, which will
5607 become part of the .bss section of the executable. There will be
5608 an entry for this symbol in the .dynsym section. The dynamic
5609 object will contain position independent code, so all references
5610 from the dynamic object to this symbol will go through the global
5611 offset table. The dynamic linker will use the .dynsym entry to
5612 determine the address it must put in the global offset table, so
5613 both the dynamic object and the regular object will refer to the
5614 same memory location for the variable. */
5615
5616 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5617 to copy the initial value out of the dynamic object and into the
5618 runtime process image. We need to remember the offset into the
5619 .rela.bss section we are going to use. */
5620 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5621 {
5622 htab->relbss->size += sizeof (Elf64_External_Rela);
5623 h->needs_copy = 1;
5624 }
5625
5626 /* We need to figure out the alignment required for this symbol. I
5627 have no idea how ELF linkers handle this. */
5628 power_of_two = bfd_log2 (h->size);
5629 if (power_of_two > 4)
5630 power_of_two = 4;
5631
5632 /* Apply the required alignment. */
5633 s = htab->dynbss;
5634 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5635 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5636 {
5637 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5638 return FALSE;
5639 }
5640
5641 /* Define the symbol as being at this point in the section. */
5642 h->root.u.def.section = s;
5643 h->root.u.def.value = s->size;
5644
5645 /* Increment the section size to make room for the symbol. */
5646 s->size += h->size;
5647
5648 return TRUE;
5649 }
5650
5651 /* If given a function descriptor symbol, hide both the function code
5652 sym and the descriptor. */
5653 static void
5654 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5655 struct elf_link_hash_entry *h,
5656 bfd_boolean force_local)
5657 {
5658 struct ppc_link_hash_entry *eh;
5659 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5660
5661 eh = (struct ppc_link_hash_entry *) h;
5662 if (eh->is_func_descriptor)
5663 {
5664 struct ppc_link_hash_entry *fh = eh->oh;
5665
5666 if (fh == NULL)
5667 {
5668 const char *p, *q;
5669 struct ppc_link_hash_table *htab;
5670 char save;
5671
5672 /* We aren't supposed to use alloca in BFD because on
5673 systems which do not have alloca the version in libiberty
5674 calls xmalloc, which might cause the program to crash
5675 when it runs out of memory. This function doesn't have a
5676 return status, so there's no way to gracefully return an
5677 error. So cheat. We know that string[-1] can be safely
5678 accessed; It's either a string in an ELF string table,
5679 or allocated in an objalloc structure. */
5680
5681 p = eh->elf.root.root.string - 1;
5682 save = *p;
5683 *(char *) p = '.';
5684 htab = ppc_hash_table (info);
5685 fh = (struct ppc_link_hash_entry *)
5686 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5687 *(char *) p = save;
5688
5689 /* Unfortunately, if it so happens that the string we were
5690 looking for was allocated immediately before this string,
5691 then we overwrote the string terminator. That's the only
5692 reason the lookup should fail. */
5693 if (fh == NULL)
5694 {
5695 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5696 while (q >= eh->elf.root.root.string && *q == *p)
5697 --q, --p;
5698 if (q < eh->elf.root.root.string && *p == '.')
5699 fh = (struct ppc_link_hash_entry *)
5700 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5701 }
5702 if (fh != NULL)
5703 {
5704 eh->oh = fh;
5705 fh->oh = eh;
5706 }
5707 }
5708 if (fh != NULL)
5709 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5710 }
5711 }
5712
5713 static bfd_boolean
5714 get_sym_h (struct elf_link_hash_entry **hp,
5715 Elf_Internal_Sym **symp,
5716 asection **symsecp,
5717 char **tls_maskp,
5718 Elf_Internal_Sym **locsymsp,
5719 unsigned long r_symndx,
5720 bfd *ibfd)
5721 {
5722 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5723
5724 if (r_symndx >= symtab_hdr->sh_info)
5725 {
5726 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5727 struct elf_link_hash_entry *h;
5728
5729 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5730 while (h->root.type == bfd_link_hash_indirect
5731 || h->root.type == bfd_link_hash_warning)
5732 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5733
5734 if (hp != NULL)
5735 *hp = h;
5736
5737 if (symp != NULL)
5738 *symp = NULL;
5739
5740 if (symsecp != NULL)
5741 {
5742 asection *symsec = NULL;
5743 if (h->root.type == bfd_link_hash_defined
5744 || h->root.type == bfd_link_hash_defweak)
5745 symsec = h->root.u.def.section;
5746 *symsecp = symsec;
5747 }
5748
5749 if (tls_maskp != NULL)
5750 {
5751 struct ppc_link_hash_entry *eh;
5752
5753 eh = (struct ppc_link_hash_entry *) h;
5754 *tls_maskp = &eh->tls_mask;
5755 }
5756 }
5757 else
5758 {
5759 Elf_Internal_Sym *sym;
5760 Elf_Internal_Sym *locsyms = *locsymsp;
5761
5762 if (locsyms == NULL)
5763 {
5764 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5765 if (locsyms == NULL)
5766 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5767 symtab_hdr->sh_info,
5768 0, NULL, NULL, NULL);
5769 if (locsyms == NULL)
5770 return FALSE;
5771 *locsymsp = locsyms;
5772 }
5773 sym = locsyms + r_symndx;
5774
5775 if (hp != NULL)
5776 *hp = NULL;
5777
5778 if (symp != NULL)
5779 *symp = sym;
5780
5781 if (symsecp != NULL)
5782 {
5783 asection *symsec = NULL;
5784 if ((sym->st_shndx != SHN_UNDEF
5785 && sym->st_shndx < SHN_LORESERVE)
5786 || sym->st_shndx > SHN_HIRESERVE)
5787 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5788 *symsecp = symsec;
5789 }
5790
5791 if (tls_maskp != NULL)
5792 {
5793 struct got_entry **lgot_ents;
5794 char *tls_mask;
5795
5796 tls_mask = NULL;
5797 lgot_ents = elf_local_got_ents (ibfd);
5798 if (lgot_ents != NULL)
5799 {
5800 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5801 tls_mask = &lgot_masks[r_symndx];
5802 }
5803 *tls_maskp = tls_mask;
5804 }
5805 }
5806 return TRUE;
5807 }
5808
5809 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5810 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5811 type suitable for optimization, and 1 otherwise. */
5812
5813 static int
5814 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5815 Elf_Internal_Sym **locsymsp,
5816 const Elf_Internal_Rela *rel, bfd *ibfd)
5817 {
5818 unsigned long r_symndx;
5819 int next_r;
5820 struct elf_link_hash_entry *h;
5821 Elf_Internal_Sym *sym;
5822 asection *sec;
5823 bfd_vma off;
5824
5825 r_symndx = ELF64_R_SYM (rel->r_info);
5826 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5827 return 0;
5828
5829 if ((*tls_maskp != NULL && **tls_maskp != 0)
5830 || sec == NULL
5831 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5832 return 1;
5833
5834 /* Look inside a TOC section too. */
5835 if (h != NULL)
5836 {
5837 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5838 off = h->root.u.def.value;
5839 }
5840 else
5841 off = sym->st_value;
5842 off += rel->r_addend;
5843 BFD_ASSERT (off % 8 == 0);
5844 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5845 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5846 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5847 return 0;
5848 if (toc_symndx != NULL)
5849 *toc_symndx = r_symndx;
5850 if ((h == NULL
5851 || ((h->root.type == bfd_link_hash_defined
5852 || h->root.type == bfd_link_hash_defweak)
5853 && !h->def_dynamic))
5854 && (next_r == -1 || next_r == -2))
5855 return 1 - next_r;
5856 return 1;
5857 }
5858
5859 /* Adjust all global syms defined in opd sections. In gcc generated
5860 code for the old ABI, these will already have been done. */
5861
5862 static bfd_boolean
5863 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5864 {
5865 struct ppc_link_hash_entry *eh;
5866 asection *sym_sec;
5867 long *opd_adjust;
5868
5869 if (h->root.type == bfd_link_hash_indirect)
5870 return TRUE;
5871
5872 if (h->root.type == bfd_link_hash_warning)
5873 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5874
5875 if (h->root.type != bfd_link_hash_defined
5876 && h->root.type != bfd_link_hash_defweak)
5877 return TRUE;
5878
5879 eh = (struct ppc_link_hash_entry *) h;
5880 if (eh->adjust_done)
5881 return TRUE;
5882
5883 sym_sec = eh->elf.root.u.def.section;
5884 opd_adjust = get_opd_info (sym_sec);
5885 if (opd_adjust != NULL)
5886 {
5887 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5888 if (adjust == -1)
5889 {
5890 /* This entry has been deleted. */
5891 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5892 if (dsec == NULL)
5893 {
5894 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5895 if (elf_discarded_section (dsec))
5896 {
5897 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5898 break;
5899 }
5900 }
5901 eh->elf.root.u.def.value = 0;
5902 eh->elf.root.u.def.section = dsec;
5903 }
5904 else
5905 eh->elf.root.u.def.value += adjust;
5906 eh->adjust_done = 1;
5907 }
5908 return TRUE;
5909 }
5910
5911 /* Remove unused Official Procedure Descriptor entries. Currently we
5912 only remove those associated with functions in discarded link-once
5913 sections, or weakly defined functions that have been overridden. It
5914 would be possible to remove many more entries for statically linked
5915 applications. */
5916
5917 bfd_boolean
5918 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5919 bfd_boolean non_overlapping)
5920 {
5921 bfd *ibfd;
5922 bfd_boolean some_edited = FALSE;
5923 asection *need_pad = NULL;
5924
5925 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5926 {
5927 asection *sec;
5928 Elf_Internal_Rela *relstart, *rel, *relend;
5929 Elf_Internal_Shdr *symtab_hdr;
5930 Elf_Internal_Sym *local_syms;
5931 struct elf_link_hash_entry **sym_hashes;
5932 bfd_vma offset;
5933 bfd_size_type amt;
5934 long *opd_adjust;
5935 bfd_boolean need_edit, add_aux_fields;
5936 bfd_size_type cnt_16b = 0;
5937
5938 sec = bfd_get_section_by_name (ibfd, ".opd");
5939 if (sec == NULL)
5940 continue;
5941
5942 amt = sec->size * sizeof (long) / 8;
5943 opd_adjust = get_opd_info (sec);
5944 if (opd_adjust == NULL)
5945 {
5946 /* check_relocs hasn't been called. Must be a ld -r link
5947 or --just-symbols object. */
5948 opd_adjust = bfd_zalloc (obfd, amt);
5949 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5950 }
5951 memset (opd_adjust, 0, amt);
5952
5953 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
5954 continue;
5955
5956 if (sec->output_section == bfd_abs_section_ptr)
5957 continue;
5958
5959 /* Look through the section relocs. */
5960 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5961 continue;
5962
5963 local_syms = NULL;
5964 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5965 sym_hashes = elf_sym_hashes (ibfd);
5966
5967 /* Read the relocations. */
5968 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5969 info->keep_memory);
5970 if (relstart == NULL)
5971 return FALSE;
5972
5973 /* First run through the relocs to check they are sane, and to
5974 determine whether we need to edit this opd section. */
5975 need_edit = FALSE;
5976 need_pad = sec;
5977 offset = 0;
5978 relend = relstart + sec->reloc_count;
5979 for (rel = relstart; rel < relend; )
5980 {
5981 enum elf_ppc64_reloc_type r_type;
5982 unsigned long r_symndx;
5983 asection *sym_sec;
5984 struct elf_link_hash_entry *h;
5985 Elf_Internal_Sym *sym;
5986
5987 /* .opd contains a regular array of 16 or 24 byte entries. We're
5988 only interested in the reloc pointing to a function entry
5989 point. */
5990 if (rel->r_offset != offset
5991 || rel + 1 >= relend
5992 || (rel + 1)->r_offset != offset + 8)
5993 {
5994 /* If someone messes with .opd alignment then after a
5995 "ld -r" we might have padding in the middle of .opd.
5996 Also, there's nothing to prevent someone putting
5997 something silly in .opd with the assembler. No .opd
5998 optimization for them! */
5999 broken_opd:
6000 (*_bfd_error_handler)
6001 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6002 need_edit = FALSE;
6003 break;
6004 }
6005
6006 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6007 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6008 {
6009 (*_bfd_error_handler)
6010 (_("%B: unexpected reloc type %u in .opd section"),
6011 ibfd, r_type);
6012 need_edit = FALSE;
6013 break;
6014 }
6015
6016 r_symndx = ELF64_R_SYM (rel->r_info);
6017 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6018 r_symndx, ibfd))
6019 goto error_ret;
6020
6021 if (sym_sec == NULL || sym_sec->owner == NULL)
6022 {
6023 const char *sym_name;
6024 if (h != NULL)
6025 sym_name = h->root.root.string;
6026 else
6027 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym);
6028
6029 (*_bfd_error_handler)
6030 (_("%B: undefined sym `%s' in .opd section"),
6031 ibfd, sym_name);
6032 need_edit = FALSE;
6033 break;
6034 }
6035
6036 /* opd entries are always for functions defined in the
6037 current input bfd. If the symbol isn't defined in the
6038 input bfd, then we won't be using the function in this
6039 bfd; It must be defined in a linkonce section in another
6040 bfd, or is weak. It's also possible that we are
6041 discarding the function due to a linker script /DISCARD/,
6042 which we test for via the output_section. */
6043 if (sym_sec->owner != ibfd
6044 || sym_sec->output_section == bfd_abs_section_ptr)
6045 need_edit = TRUE;
6046
6047 rel += 2;
6048 if (rel == relend
6049 || (rel + 1 == relend && rel->r_offset == offset + 16))
6050 {
6051 if (sec->size == offset + 24)
6052 {
6053 need_pad = NULL;
6054 break;
6055 }
6056 if (rel == relend && sec->size == offset + 16)
6057 {
6058 cnt_16b++;
6059 break;
6060 }
6061 goto broken_opd;
6062 }
6063
6064 if (rel->r_offset == offset + 24)
6065 offset += 24;
6066 else if (rel->r_offset != offset + 16)
6067 goto broken_opd;
6068 else if (rel + 1 < relend
6069 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6070 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6071 {
6072 offset += 16;
6073 cnt_16b++;
6074 }
6075 else if (rel + 2 < relend
6076 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6077 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6078 {
6079 offset += 24;
6080 rel += 1;
6081 }
6082 else
6083 goto broken_opd;
6084 }
6085
6086 add_aux_fields = non_overlapping && cnt_16b > 0;
6087
6088 if (need_edit || add_aux_fields)
6089 {
6090 Elf_Internal_Rela *write_rel;
6091 bfd_byte *rptr, *wptr;
6092 bfd_byte *new_contents = NULL;
6093 bfd_boolean skip;
6094 long opd_ent_size;
6095
6096 /* This seems a waste of time as input .opd sections are all
6097 zeros as generated by gcc, but I suppose there's no reason
6098 this will always be so. We might start putting something in
6099 the third word of .opd entries. */
6100 if ((sec->flags & SEC_IN_MEMORY) == 0)
6101 {
6102 bfd_byte *loc;
6103 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6104 {
6105 if (loc != NULL)
6106 free (loc);
6107 error_ret:
6108 if (local_syms != NULL
6109 && symtab_hdr->contents != (unsigned char *) local_syms)
6110 free (local_syms);
6111 if (elf_section_data (sec)->relocs != relstart)
6112 free (relstart);
6113 return FALSE;
6114 }
6115 sec->contents = loc;
6116 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6117 }
6118
6119 elf_section_data (sec)->relocs = relstart;
6120
6121 wptr = sec->contents;
6122 rptr = sec->contents;
6123 new_contents = sec->contents;
6124
6125 if (add_aux_fields)
6126 {
6127 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6128 if (new_contents == NULL)
6129 return FALSE;
6130 need_pad = FALSE;
6131 wptr = new_contents;
6132 }
6133
6134 write_rel = relstart;
6135 skip = FALSE;
6136 offset = 0;
6137 opd_ent_size = 0;
6138 for (rel = relstart; rel < relend; rel++)
6139 {
6140 unsigned long r_symndx;
6141 asection *sym_sec;
6142 struct elf_link_hash_entry *h;
6143 Elf_Internal_Sym *sym;
6144
6145 r_symndx = ELF64_R_SYM (rel->r_info);
6146 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6147 r_symndx, ibfd))
6148 goto error_ret;
6149
6150 if (rel->r_offset == offset)
6151 {
6152 struct ppc_link_hash_entry *fdh = NULL;
6153
6154 /* See if the .opd entry is full 24 byte or
6155 16 byte (with fd_aux entry overlapped with next
6156 fd_func). */
6157 opd_ent_size = 24;
6158 if ((rel + 2 == relend && sec->size == offset + 16)
6159 || (rel + 3 < relend
6160 && rel[2].r_offset == offset + 16
6161 && rel[3].r_offset == offset + 24
6162 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6163 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6164 opd_ent_size = 16;
6165
6166 if (h != NULL
6167 && h->root.root.string[0] == '.')
6168 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6169 ppc_hash_table (info));
6170
6171 skip = (sym_sec->owner != ibfd
6172 || sym_sec->output_section == bfd_abs_section_ptr);
6173 if (skip)
6174 {
6175 if (fdh != NULL && sym_sec->owner == ibfd)
6176 {
6177 /* Arrange for the function descriptor sym
6178 to be dropped. */
6179 fdh->elf.root.u.def.value = 0;
6180 fdh->elf.root.u.def.section = sym_sec;
6181 }
6182 opd_adjust[rel->r_offset / 8] = -1;
6183 }
6184 else
6185 {
6186 /* We'll be keeping this opd entry. */
6187
6188 if (fdh != NULL)
6189 {
6190 /* Redefine the function descriptor symbol to
6191 this location in the opd section. It is
6192 necessary to update the value here rather
6193 than using an array of adjustments as we do
6194 for local symbols, because various places
6195 in the generic ELF code use the value
6196 stored in u.def.value. */
6197 fdh->elf.root.u.def.value = wptr - new_contents;
6198 fdh->adjust_done = 1;
6199 }
6200
6201 /* Local syms are a bit tricky. We could
6202 tweak them as they can be cached, but
6203 we'd need to look through the local syms
6204 for the function descriptor sym which we
6205 don't have at the moment. So keep an
6206 array of adjustments. */
6207 opd_adjust[rel->r_offset / 8]
6208 = (wptr - new_contents) - (rptr - sec->contents);
6209
6210 if (wptr != rptr)
6211 memcpy (wptr, rptr, opd_ent_size);
6212 wptr += opd_ent_size;
6213 if (add_aux_fields && opd_ent_size == 16)
6214 {
6215 memset (wptr, '\0', 8);
6216 wptr += 8;
6217 }
6218 }
6219 rptr += opd_ent_size;
6220 offset += opd_ent_size;
6221 }
6222
6223 if (skip)
6224 {
6225 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6226 if (info->shared)
6227 {
6228 /* We won't be needing dynamic relocs here. */
6229 struct ppc_dyn_relocs **pp;
6230 struct ppc_dyn_relocs *p;
6231
6232 if (h != NULL)
6233 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6234 else if (sym_sec != NULL)
6235 pp = ((struct ppc_dyn_relocs **)
6236 &elf_section_data (sym_sec)->local_dynrel);
6237 else
6238 pp = ((struct ppc_dyn_relocs **)
6239 &elf_section_data (sec)->local_dynrel);
6240 while ((p = *pp) != NULL)
6241 {
6242 if (p->sec == sec)
6243 {
6244 p->count -= 1;
6245 if (p->count == 0)
6246 *pp = p->next;
6247 break;
6248 }
6249 pp = &p->next;
6250 }
6251 }
6252 }
6253 else
6254 {
6255 /* We need to adjust any reloc offsets to point to the
6256 new opd entries. While we're at it, we may as well
6257 remove redundant relocs. */
6258 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6259 if (write_rel != rel)
6260 memcpy (write_rel, rel, sizeof (*rel));
6261 ++write_rel;
6262 }
6263 }
6264
6265 sec->size = wptr - new_contents;
6266 sec->reloc_count = write_rel - relstart;
6267 if (add_aux_fields)
6268 {
6269 free (sec->contents);
6270 sec->contents = new_contents;
6271 }
6272
6273 /* Fudge the size too, as this is used later in
6274 elf_bfd_final_link if we are emitting relocs. */
6275 elf_section_data (sec)->rel_hdr.sh_size
6276 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6277 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6278 some_edited = TRUE;
6279 }
6280 else if (elf_section_data (sec)->relocs != relstart)
6281 free (relstart);
6282
6283 if (local_syms != NULL
6284 && symtab_hdr->contents != (unsigned char *) local_syms)
6285 {
6286 if (!info->keep_memory)
6287 free (local_syms);
6288 else
6289 symtab_hdr->contents = (unsigned char *) local_syms;
6290 }
6291 }
6292
6293 if (some_edited)
6294 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6295
6296 /* If we are doing a final link and the last .opd entry is just 16 byte
6297 long, add a 8 byte padding after it. */
6298 if (need_pad != NULL && !info->relocatable)
6299 {
6300 bfd_byte *p;
6301
6302 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6303 {
6304 BFD_ASSERT (need_pad->size > 0);
6305
6306 p = bfd_malloc (need_pad->size + 8);
6307 if (p == NULL)
6308 return FALSE;
6309
6310 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6311 p, 0, need_pad->size))
6312 return FALSE;
6313
6314 need_pad->contents = p;
6315 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6316 }
6317 else
6318 {
6319 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6320 if (p == NULL)
6321 return FALSE;
6322
6323 need_pad->contents = p;
6324 }
6325
6326 memset (need_pad->contents + need_pad->size, 0, 8);
6327 need_pad->size += 8;
6328 }
6329
6330 return TRUE;
6331 }
6332
6333 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6334
6335 asection *
6336 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6337 {
6338 struct ppc_link_hash_table *htab;
6339
6340 htab = ppc_hash_table (info);
6341 if (htab->tls_get_addr != NULL)
6342 {
6343 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6344
6345 while (h->elf.root.type == bfd_link_hash_indirect
6346 || h->elf.root.type == bfd_link_hash_warning)
6347 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6348
6349 htab->tls_get_addr = h;
6350
6351 if (htab->tls_get_addr_fd == NULL
6352 && h->oh != NULL
6353 && h->oh->is_func_descriptor)
6354 htab->tls_get_addr_fd = h->oh;
6355 }
6356
6357 if (htab->tls_get_addr_fd != NULL)
6358 {
6359 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6360
6361 while (h->elf.root.type == bfd_link_hash_indirect
6362 || h->elf.root.type == bfd_link_hash_warning)
6363 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6364
6365 htab->tls_get_addr_fd = h;
6366 }
6367
6368 return _bfd_elf_tls_setup (obfd, info);
6369 }
6370
6371 /* Run through all the TLS relocs looking for optimization
6372 opportunities. The linker has been hacked (see ppc64elf.em) to do
6373 a preliminary section layout so that we know the TLS segment
6374 offsets. We can't optimize earlier because some optimizations need
6375 to know the tp offset, and we need to optimize before allocating
6376 dynamic relocations. */
6377
6378 bfd_boolean
6379 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6380 {
6381 bfd *ibfd;
6382 asection *sec;
6383 struct ppc_link_hash_table *htab;
6384
6385 if (info->relocatable || info->shared)
6386 return TRUE;
6387
6388 htab = ppc_hash_table (info);
6389 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6390 {
6391 Elf_Internal_Sym *locsyms = NULL;
6392
6393 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6394 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6395 {
6396 Elf_Internal_Rela *relstart, *rel, *relend;
6397 int expecting_tls_get_addr;
6398
6399 /* Read the relocations. */
6400 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6401 info->keep_memory);
6402 if (relstart == NULL)
6403 return FALSE;
6404
6405 expecting_tls_get_addr = 0;
6406 relend = relstart + sec->reloc_count;
6407 for (rel = relstart; rel < relend; rel++)
6408 {
6409 enum elf_ppc64_reloc_type r_type;
6410 unsigned long r_symndx;
6411 struct elf_link_hash_entry *h;
6412 Elf_Internal_Sym *sym;
6413 asection *sym_sec;
6414 char *tls_mask;
6415 char tls_set, tls_clear, tls_type = 0;
6416 bfd_vma value;
6417 bfd_boolean ok_tprel, is_local;
6418
6419 r_symndx = ELF64_R_SYM (rel->r_info);
6420 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6421 r_symndx, ibfd))
6422 {
6423 err_free_rel:
6424 if (elf_section_data (sec)->relocs != relstart)
6425 free (relstart);
6426 if (locsyms != NULL
6427 && (elf_tdata (ibfd)->symtab_hdr.contents
6428 != (unsigned char *) locsyms))
6429 free (locsyms);
6430 return FALSE;
6431 }
6432
6433 if (h != NULL)
6434 {
6435 if (h->root.type != bfd_link_hash_defined
6436 && h->root.type != bfd_link_hash_defweak)
6437 continue;
6438 value = h->root.u.def.value;
6439 }
6440 else
6441 /* Symbols referenced by TLS relocs must be of type
6442 STT_TLS. So no need for .opd local sym adjust. */
6443 value = sym->st_value;
6444
6445 ok_tprel = FALSE;
6446 is_local = FALSE;
6447 if (h == NULL
6448 || !h->def_dynamic)
6449 {
6450 is_local = TRUE;
6451 value += sym_sec->output_offset;
6452 value += sym_sec->output_section->vma;
6453 value -= htab->elf.tls_sec->vma;
6454 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6455 < (bfd_vma) 1 << 32);
6456 }
6457
6458 r_type = ELF64_R_TYPE (rel->r_info);
6459 switch (r_type)
6460 {
6461 case R_PPC64_GOT_TLSLD16:
6462 case R_PPC64_GOT_TLSLD16_LO:
6463 case R_PPC64_GOT_TLSLD16_HI:
6464 case R_PPC64_GOT_TLSLD16_HA:
6465 /* These relocs should never be against a symbol
6466 defined in a shared lib. Leave them alone if
6467 that turns out to be the case. */
6468 ppc64_tlsld_got (ibfd)->refcount -= 1;
6469 if (!is_local)
6470 continue;
6471
6472 /* LD -> LE */
6473 tls_set = 0;
6474 tls_clear = TLS_LD;
6475 tls_type = TLS_TLS | TLS_LD;
6476 expecting_tls_get_addr = 1;
6477 break;
6478
6479 case R_PPC64_GOT_TLSGD16:
6480 case R_PPC64_GOT_TLSGD16_LO:
6481 case R_PPC64_GOT_TLSGD16_HI:
6482 case R_PPC64_GOT_TLSGD16_HA:
6483 if (ok_tprel)
6484 /* GD -> LE */
6485 tls_set = 0;
6486 else
6487 /* GD -> IE */
6488 tls_set = TLS_TLS | TLS_TPRELGD;
6489 tls_clear = TLS_GD;
6490 tls_type = TLS_TLS | TLS_GD;
6491 expecting_tls_get_addr = 1;
6492 break;
6493
6494 case R_PPC64_GOT_TPREL16_DS:
6495 case R_PPC64_GOT_TPREL16_LO_DS:
6496 case R_PPC64_GOT_TPREL16_HI:
6497 case R_PPC64_GOT_TPREL16_HA:
6498 expecting_tls_get_addr = 0;
6499 if (ok_tprel)
6500 {
6501 /* IE -> LE */
6502 tls_set = 0;
6503 tls_clear = TLS_TPREL;
6504 tls_type = TLS_TLS | TLS_TPREL;
6505 break;
6506 }
6507 else
6508 continue;
6509
6510 case R_PPC64_REL14:
6511 case R_PPC64_REL14_BRTAKEN:
6512 case R_PPC64_REL14_BRNTAKEN:
6513 case R_PPC64_REL24:
6514 if (h != NULL
6515 && (h == &htab->tls_get_addr->elf
6516 || h == &htab->tls_get_addr_fd->elf))
6517 {
6518 if (!expecting_tls_get_addr
6519 && rel != relstart
6520 && ((ELF64_R_TYPE (rel[-1].r_info)
6521 == R_PPC64_TOC16)
6522 || (ELF64_R_TYPE (rel[-1].r_info)
6523 == R_PPC64_TOC16_LO)))
6524 {
6525 /* Check for toc tls entries. */
6526 char *toc_tls;
6527 int retval;
6528
6529 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6530 rel - 1, ibfd);
6531 if (retval == 0)
6532 goto err_free_rel;
6533 if (toc_tls != NULL)
6534 expecting_tls_get_addr = retval > 1;
6535 }
6536
6537 if (expecting_tls_get_addr)
6538 {
6539 struct plt_entry *ent;
6540 for (ent = h->plt.plist; ent; ent = ent->next)
6541 if (ent->addend == 0)
6542 {
6543 if (ent->plt.refcount > 0)
6544 ent->plt.refcount -= 1;
6545 break;
6546 }
6547 }
6548 }
6549 expecting_tls_get_addr = 0;
6550 continue;
6551
6552 case R_PPC64_TPREL64:
6553 expecting_tls_get_addr = 0;
6554 if (ok_tprel)
6555 {
6556 /* IE -> LE */
6557 tls_set = TLS_EXPLICIT;
6558 tls_clear = TLS_TPREL;
6559 break;
6560 }
6561 else
6562 continue;
6563
6564 case R_PPC64_DTPMOD64:
6565 expecting_tls_get_addr = 0;
6566 if (rel + 1 < relend
6567 && (rel[1].r_info
6568 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6569 && rel[1].r_offset == rel->r_offset + 8)
6570 {
6571 if (ok_tprel)
6572 /* GD -> LE */
6573 tls_set = TLS_EXPLICIT | TLS_GD;
6574 else
6575 /* GD -> IE */
6576 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6577 tls_clear = TLS_GD;
6578 }
6579 else
6580 {
6581 if (!is_local)
6582 continue;
6583
6584 /* LD -> LE */
6585 tls_set = TLS_EXPLICIT;
6586 tls_clear = TLS_LD;
6587 }
6588 break;
6589
6590 default:
6591 expecting_tls_get_addr = 0;
6592 continue;
6593 }
6594
6595 if ((tls_set & TLS_EXPLICIT) == 0)
6596 {
6597 struct got_entry *ent;
6598
6599 /* Adjust got entry for this reloc. */
6600 if (h != NULL)
6601 ent = h->got.glist;
6602 else
6603 ent = elf_local_got_ents (ibfd)[r_symndx];
6604
6605 for (; ent != NULL; ent = ent->next)
6606 if (ent->addend == rel->r_addend
6607 && ent->owner == ibfd
6608 && ent->tls_type == tls_type)
6609 break;
6610 if (ent == NULL)
6611 abort ();
6612
6613 if (tls_set == 0)
6614 {
6615 /* We managed to get rid of a got entry. */
6616 if (ent->got.refcount > 0)
6617 ent->got.refcount -= 1;
6618 }
6619 }
6620 else if (h != NULL)
6621 {
6622 struct ppc_link_hash_entry * eh;
6623 struct ppc_dyn_relocs **pp;
6624 struct ppc_dyn_relocs *p;
6625
6626 /* Adjust dynamic relocs. */
6627 eh = (struct ppc_link_hash_entry *) h;
6628 for (pp = &eh->dyn_relocs;
6629 (p = *pp) != NULL;
6630 pp = &p->next)
6631 if (p->sec == sec)
6632 {
6633 /* If we got rid of a DTPMOD/DTPREL reloc
6634 pair then we'll lose one or two dyn
6635 relocs. */
6636 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6637 p->count -= 1;
6638 p->count -= 1;
6639 if (p->count == 0)
6640 *pp = p->next;
6641 break;
6642 }
6643 }
6644
6645 *tls_mask |= tls_set;
6646 *tls_mask &= ~tls_clear;
6647 }
6648
6649 if (elf_section_data (sec)->relocs != relstart)
6650 free (relstart);
6651 }
6652
6653 if (locsyms != NULL
6654 && (elf_tdata (ibfd)->symtab_hdr.contents
6655 != (unsigned char *) locsyms))
6656 {
6657 if (!info->keep_memory)
6658 free (locsyms);
6659 else
6660 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6661 }
6662 }
6663 return TRUE;
6664 }
6665
6666 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6667 the values of any global symbols in a toc section that has been
6668 edited. Globals in toc sections should be a rarity, so this function
6669 sets a flag if any are found in toc sections other than the one just
6670 edited, so that futher hash table traversals can be avoided. */
6671
6672 struct adjust_toc_info
6673 {
6674 asection *toc;
6675 unsigned long *skip;
6676 bfd_boolean global_toc_syms;
6677 };
6678
6679 static bfd_boolean
6680 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6681 {
6682 struct ppc_link_hash_entry *eh;
6683 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6684
6685 if (h->root.type == bfd_link_hash_indirect)
6686 return TRUE;
6687
6688 if (h->root.type == bfd_link_hash_warning)
6689 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6690
6691 if (h->root.type != bfd_link_hash_defined
6692 && h->root.type != bfd_link_hash_defweak)
6693 return TRUE;
6694
6695 eh = (struct ppc_link_hash_entry *) h;
6696 if (eh->adjust_done)
6697 return TRUE;
6698
6699 if (eh->elf.root.u.def.section == toc_inf->toc)
6700 {
6701 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6702 if (skip != (unsigned long) -1)
6703 eh->elf.root.u.def.value -= skip;
6704 else
6705 {
6706 (*_bfd_error_handler)
6707 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6708 eh->elf.root.u.def.section = &bfd_abs_section;
6709 eh->elf.root.u.def.value = 0;
6710 }
6711 eh->adjust_done = 1;
6712 }
6713 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6714 toc_inf->global_toc_syms = TRUE;
6715
6716 return TRUE;
6717 }
6718
6719 /* Examine all relocs referencing .toc sections in order to remove
6720 unused .toc entries. */
6721
6722 bfd_boolean
6723 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6724 {
6725 bfd *ibfd;
6726 struct adjust_toc_info toc_inf;
6727
6728 toc_inf.global_toc_syms = TRUE;
6729 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6730 {
6731 asection *toc, *sec;
6732 Elf_Internal_Shdr *symtab_hdr;
6733 Elf_Internal_Sym *local_syms;
6734 struct elf_link_hash_entry **sym_hashes;
6735 Elf_Internal_Rela *relstart, *rel, *wrel;
6736 unsigned long *skip, *drop;
6737 unsigned char *used;
6738 unsigned char *keep, last, some_unused;
6739
6740 toc = bfd_get_section_by_name (ibfd, ".toc");
6741 if (toc == NULL
6742 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6743 || elf_discarded_section (toc))
6744 continue;
6745
6746 local_syms = NULL;
6747 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6748 sym_hashes = elf_sym_hashes (ibfd);
6749
6750 /* Look at sections dropped from the final link. */
6751 skip = NULL;
6752 relstart = NULL;
6753 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6754 {
6755 if (sec->reloc_count == 0
6756 || !elf_discarded_section (sec)
6757 || get_opd_info (sec)
6758 || (sec->flags & SEC_ALLOC) == 0
6759 || (sec->flags & SEC_DEBUGGING) != 0)
6760 continue;
6761
6762 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6763 if (relstart == NULL)
6764 goto error_ret;
6765
6766 /* Run through the relocs to see which toc entries might be
6767 unused. */
6768 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6769 {
6770 enum elf_ppc64_reloc_type r_type;
6771 unsigned long r_symndx;
6772 asection *sym_sec;
6773 struct elf_link_hash_entry *h;
6774 Elf_Internal_Sym *sym;
6775 bfd_vma val;
6776
6777 r_type = ELF64_R_TYPE (rel->r_info);
6778 switch (r_type)
6779 {
6780 default:
6781 continue;
6782
6783 case R_PPC64_TOC16:
6784 case R_PPC64_TOC16_LO:
6785 case R_PPC64_TOC16_HI:
6786 case R_PPC64_TOC16_HA:
6787 case R_PPC64_TOC16_DS:
6788 case R_PPC64_TOC16_LO_DS:
6789 break;
6790 }
6791
6792 r_symndx = ELF64_R_SYM (rel->r_info);
6793 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6794 r_symndx, ibfd))
6795 goto error_ret;
6796
6797 if (sym_sec != toc)
6798 continue;
6799
6800 if (h != NULL)
6801 val = h->root.u.def.value;
6802 else
6803 val = sym->st_value;
6804 val += rel->r_addend;
6805
6806 if (val >= toc->size)
6807 continue;
6808
6809 /* Anything in the toc ought to be aligned to 8 bytes.
6810 If not, don't mark as unused. */
6811 if (val & 7)
6812 continue;
6813
6814 if (skip == NULL)
6815 {
6816 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6817 if (skip == NULL)
6818 goto error_ret;
6819 }
6820
6821 skip[val >> 3] = 1;
6822 }
6823
6824 if (elf_section_data (sec)->relocs != relstart)
6825 free (relstart);
6826 }
6827
6828 if (skip == NULL)
6829 continue;
6830
6831 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6832 if (used == NULL)
6833 {
6834 error_ret:
6835 if (local_syms != NULL
6836 && symtab_hdr->contents != (unsigned char *) local_syms)
6837 free (local_syms);
6838 if (sec != NULL
6839 && relstart != NULL
6840 && elf_section_data (sec)->relocs != relstart)
6841 free (relstart);
6842 if (skip != NULL)
6843 free (skip);
6844 return FALSE;
6845 }
6846
6847 /* Now check all kept sections that might reference the toc. */
6848 for (sec = ibfd->sections;
6849 sec != NULL;
6850 /* Check the toc itself last. */
6851 sec = (sec == toc ? NULL
6852 : sec->next == toc && sec->next->next ? sec->next->next
6853 : sec->next == NULL ? toc
6854 : sec->next))
6855 {
6856 int repeat;
6857
6858 if (sec->reloc_count == 0
6859 || elf_discarded_section (sec)
6860 || get_opd_info (sec)
6861 || (sec->flags & SEC_ALLOC) == 0
6862 || (sec->flags & SEC_DEBUGGING) != 0)
6863 continue;
6864
6865 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
6866 if (relstart == NULL)
6867 goto error_ret;
6868
6869 /* Mark toc entries referenced as used. */
6870 repeat = 0;
6871 do
6872 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6873 {
6874 enum elf_ppc64_reloc_type r_type;
6875 unsigned long r_symndx;
6876 asection *sym_sec;
6877 struct elf_link_hash_entry *h;
6878 Elf_Internal_Sym *sym;
6879 bfd_vma val;
6880
6881 r_type = ELF64_R_TYPE (rel->r_info);
6882 switch (r_type)
6883 {
6884 case R_PPC64_TOC16:
6885 case R_PPC64_TOC16_LO:
6886 case R_PPC64_TOC16_HI:
6887 case R_PPC64_TOC16_HA:
6888 case R_PPC64_TOC16_DS:
6889 case R_PPC64_TOC16_LO_DS:
6890 /* In case we're taking addresses of toc entries. */
6891 case R_PPC64_ADDR64:
6892 break;
6893
6894 default:
6895 continue;
6896 }
6897
6898 r_symndx = ELF64_R_SYM (rel->r_info);
6899 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6900 r_symndx, ibfd))
6901 {
6902 free (used);
6903 goto error_ret;
6904 }
6905
6906 if (sym_sec != toc)
6907 continue;
6908
6909 if (h != NULL)
6910 val = h->root.u.def.value;
6911 else
6912 val = sym->st_value;
6913 val += rel->r_addend;
6914
6915 if (val >= toc->size)
6916 continue;
6917
6918 /* For the toc section, we only mark as used if
6919 this entry itself isn't unused. */
6920 if (sec == toc
6921 && !used[val >> 3]
6922 && (used[rel->r_offset >> 3]
6923 || !skip[rel->r_offset >> 3]))
6924 /* Do all the relocs again, to catch reference
6925 chains. */
6926 repeat = 1;
6927
6928 used[val >> 3] = 1;
6929 }
6930 while (repeat);
6931 }
6932
6933 /* Merge the used and skip arrays. Assume that TOC
6934 doublewords not appearing as either used or unused belong
6935 to to an entry more than one doubleword in size. */
6936 for (drop = skip, keep = used, last = 0, some_unused = 0;
6937 drop < skip + (toc->size + 7) / 8;
6938 ++drop, ++keep)
6939 {
6940 if (*keep)
6941 {
6942 *drop = 0;
6943 last = 0;
6944 }
6945 else if (*drop)
6946 {
6947 some_unused = 1;
6948 last = 1;
6949 }
6950 else
6951 *drop = last;
6952 }
6953
6954 free (used);
6955
6956 if (some_unused)
6957 {
6958 bfd_byte *contents, *src;
6959 unsigned long off;
6960
6961 /* Shuffle the toc contents, and at the same time convert the
6962 skip array from booleans into offsets. */
6963 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
6964 goto error_ret;
6965
6966 elf_section_data (toc)->this_hdr.contents = contents;
6967
6968 for (src = contents, off = 0, drop = skip;
6969 src < contents + toc->size;
6970 src += 8, ++drop)
6971 {
6972 if (*drop)
6973 {
6974 *drop = (unsigned long) -1;
6975 off += 8;
6976 }
6977 else if (off != 0)
6978 {
6979 *drop = off;
6980 memcpy (src - off, src, 8);
6981 }
6982 }
6983 toc->rawsize = toc->size;
6984 toc->size = src - contents - off;
6985
6986 /* Read toc relocs. */
6987 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, TRUE);
6988 if (relstart == NULL)
6989 goto error_ret;
6990
6991 /* Remove unused toc relocs, and adjust those we keep. */
6992 wrel = relstart;
6993 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
6994 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
6995 {
6996 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
6997 wrel->r_info = rel->r_info;
6998 wrel->r_addend = rel->r_addend;
6999 ++wrel;
7000 }
7001 toc->reloc_count = wrel - relstart;
7002 elf_section_data (toc)->rel_hdr.sh_size
7003 = toc->reloc_count * elf_section_data (toc)->rel_hdr.sh_entsize;
7004 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7005
7006 /* Adjust addends for relocs against the toc section sym. */
7007 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7008 {
7009 if (sec->reloc_count == 0
7010 || elf_discarded_section (sec))
7011 continue;
7012
7013 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7014 TRUE);
7015 if (relstart == NULL)
7016 goto error_ret;
7017
7018 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7019 {
7020 enum elf_ppc64_reloc_type r_type;
7021 unsigned long r_symndx;
7022 asection *sym_sec;
7023 struct elf_link_hash_entry *h;
7024 Elf_Internal_Sym *sym;
7025
7026 r_type = ELF64_R_TYPE (rel->r_info);
7027 switch (r_type)
7028 {
7029 default:
7030 continue;
7031
7032 case R_PPC64_TOC16:
7033 case R_PPC64_TOC16_LO:
7034 case R_PPC64_TOC16_HI:
7035 case R_PPC64_TOC16_HA:
7036 case R_PPC64_TOC16_DS:
7037 case R_PPC64_TOC16_LO_DS:
7038 case R_PPC64_ADDR64:
7039 break;
7040 }
7041
7042 r_symndx = ELF64_R_SYM (rel->r_info);
7043 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7044 r_symndx, ibfd))
7045 goto error_ret;
7046
7047 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7048 continue;
7049
7050 rel->r_addend -= skip[rel->r_addend >> 3];
7051 }
7052 }
7053
7054 /* We shouldn't have local or global symbols defined in the TOC,
7055 but handle them anyway. */
7056 if (local_syms != NULL)
7057 {
7058 Elf_Internal_Sym *sym;
7059
7060 for (sym = local_syms;
7061 sym < local_syms + symtab_hdr->sh_info;
7062 ++sym)
7063 if (sym->st_shndx != SHN_UNDEF
7064 && (sym->st_shndx < SHN_LORESERVE
7065 || sym->st_shndx > SHN_HIRESERVE)
7066 && sym->st_value != 0
7067 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7068 {
7069 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7070 sym->st_value -= skip[sym->st_value >> 3];
7071 else
7072 {
7073 (*_bfd_error_handler)
7074 (_("%s defined in removed toc entry"),
7075 bfd_elf_sym_name (ibfd, symtab_hdr, sym));
7076 sym->st_value = 0;
7077 sym->st_shndx = SHN_ABS;
7078 }
7079 symtab_hdr->contents = (unsigned char *) local_syms;
7080 }
7081 }
7082
7083 /* Finally, adjust any global syms defined in the toc. */
7084 if (toc_inf.global_toc_syms)
7085 {
7086 toc_inf.toc = toc;
7087 toc_inf.skip = skip;
7088 toc_inf.global_toc_syms = FALSE;
7089 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7090 &toc_inf);
7091 }
7092 }
7093
7094 if (local_syms != NULL
7095 && symtab_hdr->contents != (unsigned char *) local_syms)
7096 {
7097 if (!info->keep_memory)
7098 free (local_syms);
7099 else
7100 symtab_hdr->contents = (unsigned char *) local_syms;
7101 }
7102 free (skip);
7103 }
7104
7105 return TRUE;
7106 }
7107
7108 /* Allocate space in .plt, .got and associated reloc sections for
7109 dynamic relocs. */
7110
7111 static bfd_boolean
7112 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7113 {
7114 struct bfd_link_info *info;
7115 struct ppc_link_hash_table *htab;
7116 asection *s;
7117 struct ppc_link_hash_entry *eh;
7118 struct ppc_dyn_relocs *p;
7119 struct got_entry *gent;
7120
7121 if (h->root.type == bfd_link_hash_indirect)
7122 return TRUE;
7123
7124 if (h->root.type == bfd_link_hash_warning)
7125 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7126
7127 info = (struct bfd_link_info *) inf;
7128 htab = ppc_hash_table (info);
7129
7130 if (htab->elf.dynamic_sections_created
7131 && h->dynindx != -1
7132 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7133 {
7134 struct plt_entry *pent;
7135 bfd_boolean doneone = FALSE;
7136 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7137 if (pent->plt.refcount > 0)
7138 {
7139 /* If this is the first .plt entry, make room for the special
7140 first entry. */
7141 s = htab->plt;
7142 if (s->size == 0)
7143 s->size += PLT_INITIAL_ENTRY_SIZE;
7144
7145 pent->plt.offset = s->size;
7146
7147 /* Make room for this entry. */
7148 s->size += PLT_ENTRY_SIZE;
7149
7150 /* Make room for the .glink code. */
7151 s = htab->glink;
7152 if (s->size == 0)
7153 s->size += GLINK_CALL_STUB_SIZE;
7154 /* We need bigger stubs past index 32767. */
7155 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7156 s->size += 4;
7157 s->size += 2*4;
7158
7159 /* We also need to make an entry in the .rela.plt section. */
7160 s = htab->relplt;
7161 s->size += sizeof (Elf64_External_Rela);
7162 doneone = TRUE;
7163 }
7164 else
7165 pent->plt.offset = (bfd_vma) -1;
7166 if (!doneone)
7167 {
7168 h->plt.plist = NULL;
7169 h->needs_plt = 0;
7170 }
7171 }
7172 else
7173 {
7174 h->plt.plist = NULL;
7175 h->needs_plt = 0;
7176 }
7177
7178 eh = (struct ppc_link_hash_entry *) h;
7179 /* Run through the TLS GD got entries first if we're changing them
7180 to TPREL. */
7181 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7182 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7183 if (gent->got.refcount > 0
7184 && (gent->tls_type & TLS_GD) != 0)
7185 {
7186 /* This was a GD entry that has been converted to TPREL. If
7187 there happens to be a TPREL entry we can use that one. */
7188 struct got_entry *ent;
7189 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7190 if (ent->got.refcount > 0
7191 && (ent->tls_type & TLS_TPREL) != 0
7192 && ent->addend == gent->addend
7193 && ent->owner == gent->owner)
7194 {
7195 gent->got.refcount = 0;
7196 break;
7197 }
7198
7199 /* If not, then we'll be using our own TPREL entry. */
7200 if (gent->got.refcount != 0)
7201 gent->tls_type = TLS_TLS | TLS_TPREL;
7202 }
7203
7204 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7205 if (gent->got.refcount > 0)
7206 {
7207 bfd_boolean dyn;
7208
7209 /* Make sure this symbol is output as a dynamic symbol.
7210 Undefined weak syms won't yet be marked as dynamic,
7211 nor will all TLS symbols. */
7212 if (h->dynindx == -1
7213 && !h->forced_local)
7214 {
7215 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7216 return FALSE;
7217 }
7218
7219 if ((gent->tls_type & TLS_LD) != 0
7220 && !h->def_dynamic)
7221 {
7222 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7223 continue;
7224 }
7225
7226 s = ppc64_elf_tdata (gent->owner)->got;
7227 gent->got.offset = s->size;
7228 s->size
7229 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7230 dyn = htab->elf.dynamic_sections_created;
7231 if ((info->shared
7232 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7233 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7234 || h->root.type != bfd_link_hash_undefweak))
7235 ppc64_elf_tdata (gent->owner)->relgot->size
7236 += (gent->tls_type & eh->tls_mask & TLS_GD
7237 ? 2 * sizeof (Elf64_External_Rela)
7238 : sizeof (Elf64_External_Rela));
7239 }
7240 else
7241 gent->got.offset = (bfd_vma) -1;
7242
7243 if (eh->dyn_relocs == NULL)
7244 return TRUE;
7245
7246 /* In the shared -Bsymbolic case, discard space allocated for
7247 dynamic pc-relative relocs against symbols which turn out to be
7248 defined in regular objects. For the normal shared case, discard
7249 space for relocs that have become local due to symbol visibility
7250 changes. */
7251
7252 if (info->shared)
7253 {
7254 /* Relocs that use pc_count are those that appear on a call insn,
7255 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7256 generated via assembly. We want calls to protected symbols to
7257 resolve directly to the function rather than going via the plt.
7258 If people want function pointer comparisons to work as expected
7259 then they should avoid writing weird assembly. */
7260 if (SYMBOL_CALLS_LOCAL (info, h))
7261 {
7262 struct ppc_dyn_relocs **pp;
7263
7264 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7265 {
7266 p->count -= p->pc_count;
7267 p->pc_count = 0;
7268 if (p->count == 0)
7269 *pp = p->next;
7270 else
7271 pp = &p->next;
7272 }
7273 }
7274
7275 /* Also discard relocs on undefined weak syms with non-default
7276 visibility. */
7277 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7278 && h->root.type == bfd_link_hash_undefweak)
7279 eh->dyn_relocs = NULL;
7280 }
7281 else if (ELIMINATE_COPY_RELOCS)
7282 {
7283 /* For the non-shared case, discard space for relocs against
7284 symbols which turn out to need copy relocs or are not
7285 dynamic. */
7286
7287 if (!h->non_got_ref
7288 && h->def_dynamic
7289 && !h->def_regular)
7290 {
7291 /* Make sure this symbol is output as a dynamic symbol.
7292 Undefined weak syms won't yet be marked as dynamic. */
7293 if (h->dynindx == -1
7294 && !h->forced_local)
7295 {
7296 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7297 return FALSE;
7298 }
7299
7300 /* If that succeeded, we know we'll be keeping all the
7301 relocs. */
7302 if (h->dynindx != -1)
7303 goto keep;
7304 }
7305
7306 eh->dyn_relocs = NULL;
7307
7308 keep: ;
7309 }
7310
7311 /* Finally, allocate space. */
7312 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7313 {
7314 asection *sreloc = elf_section_data (p->sec)->sreloc;
7315 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7316 }
7317
7318 return TRUE;
7319 }
7320
7321 /* Find any dynamic relocs that apply to read-only sections. */
7322
7323 static bfd_boolean
7324 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7325 {
7326 struct ppc_link_hash_entry *eh;
7327 struct ppc_dyn_relocs *p;
7328
7329 if (h->root.type == bfd_link_hash_warning)
7330 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7331
7332 eh = (struct ppc_link_hash_entry *) h;
7333 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7334 {
7335 asection *s = p->sec->output_section;
7336
7337 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7338 {
7339 struct bfd_link_info *info = inf;
7340
7341 info->flags |= DF_TEXTREL;
7342
7343 /* Not an error, just cut short the traversal. */
7344 return FALSE;
7345 }
7346 }
7347 return TRUE;
7348 }
7349
7350 /* Set the sizes of the dynamic sections. */
7351
7352 static bfd_boolean
7353 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7354 struct bfd_link_info *info)
7355 {
7356 struct ppc_link_hash_table *htab;
7357 bfd *dynobj;
7358 asection *s;
7359 bfd_boolean relocs;
7360 bfd *ibfd;
7361
7362 htab = ppc_hash_table (info);
7363 dynobj = htab->elf.dynobj;
7364 if (dynobj == NULL)
7365 abort ();
7366
7367 if (htab->elf.dynamic_sections_created)
7368 {
7369 /* Set the contents of the .interp section to the interpreter. */
7370 if (info->executable)
7371 {
7372 s = bfd_get_section_by_name (dynobj, ".interp");
7373 if (s == NULL)
7374 abort ();
7375 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7376 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7377 }
7378 }
7379
7380 /* Set up .got offsets for local syms, and space for local dynamic
7381 relocs. */
7382 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7383 {
7384 struct got_entry **lgot_ents;
7385 struct got_entry **end_lgot_ents;
7386 char *lgot_masks;
7387 bfd_size_type locsymcount;
7388 Elf_Internal_Shdr *symtab_hdr;
7389 asection *srel;
7390
7391 if (!is_ppc64_elf_target (ibfd->xvec))
7392 continue;
7393
7394 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7395 {
7396 s = ppc64_elf_tdata (ibfd)->got;
7397 ppc64_tlsld_got (ibfd)->offset = s->size;
7398 s->size += 16;
7399 if (info->shared)
7400 {
7401 srel = ppc64_elf_tdata (ibfd)->relgot;
7402 srel->size += sizeof (Elf64_External_Rela);
7403 }
7404 }
7405 else
7406 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7407
7408 for (s = ibfd->sections; s != NULL; s = s->next)
7409 {
7410 struct ppc_dyn_relocs *p;
7411
7412 for (p = *((struct ppc_dyn_relocs **)
7413 &elf_section_data (s)->local_dynrel);
7414 p != NULL;
7415 p = p->next)
7416 {
7417 if (!bfd_is_abs_section (p->sec)
7418 && bfd_is_abs_section (p->sec->output_section))
7419 {
7420 /* Input section has been discarded, either because
7421 it is a copy of a linkonce section or due to
7422 linker script /DISCARD/, so we'll be discarding
7423 the relocs too. */
7424 }
7425 else if (p->count != 0)
7426 {
7427 srel = elf_section_data (p->sec)->sreloc;
7428 srel->size += p->count * sizeof (Elf64_External_Rela);
7429 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7430 info->flags |= DF_TEXTREL;
7431 }
7432 }
7433 }
7434
7435 lgot_ents = elf_local_got_ents (ibfd);
7436 if (!lgot_ents)
7437 continue;
7438
7439 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7440 locsymcount = symtab_hdr->sh_info;
7441 end_lgot_ents = lgot_ents + locsymcount;
7442 lgot_masks = (char *) end_lgot_ents;
7443 s = ppc64_elf_tdata (ibfd)->got;
7444 srel = ppc64_elf_tdata (ibfd)->relgot;
7445 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7446 {
7447 struct got_entry *ent;
7448
7449 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7450 if (ent->got.refcount > 0)
7451 {
7452 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7453 {
7454 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7455 {
7456 ppc64_tlsld_got (ibfd)->offset = s->size;
7457 s->size += 16;
7458 if (info->shared)
7459 srel->size += sizeof (Elf64_External_Rela);
7460 }
7461 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7462 }
7463 else
7464 {
7465 ent->got.offset = s->size;
7466 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7467 {
7468 s->size += 16;
7469 if (info->shared)
7470 srel->size += 2 * sizeof (Elf64_External_Rela);
7471 }
7472 else
7473 {
7474 s->size += 8;
7475 if (info->shared)
7476 srel->size += sizeof (Elf64_External_Rela);
7477 }
7478 }
7479 }
7480 else
7481 ent->got.offset = (bfd_vma) -1;
7482 }
7483 }
7484
7485 /* Allocate global sym .plt and .got entries, and space for global
7486 sym dynamic relocs. */
7487 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7488
7489 /* We now have determined the sizes of the various dynamic sections.
7490 Allocate memory for them. */
7491 relocs = FALSE;
7492 for (s = dynobj->sections; s != NULL; s = s->next)
7493 {
7494 if ((s->flags & SEC_LINKER_CREATED) == 0)
7495 continue;
7496
7497 if (s == htab->brlt || s == htab->relbrlt)
7498 /* These haven't been allocated yet; don't strip. */
7499 continue;
7500 else if (s == htab->got
7501 || s == htab->plt
7502 || s == htab->glink)
7503 {
7504 /* Strip this section if we don't need it; see the
7505 comment below. */
7506 }
7507 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7508 {
7509 if (s->size == 0)
7510 {
7511 /* If we don't need this section, strip it from the
7512 output file. This is mostly to handle .rela.bss and
7513 .rela.plt. We must create both sections in
7514 create_dynamic_sections, because they must be created
7515 before the linker maps input sections to output
7516 sections. The linker does that before
7517 adjust_dynamic_symbol is called, and it is that
7518 function which decides whether anything needs to go
7519 into these sections. */
7520 }
7521 else
7522 {
7523 if (s != htab->relplt)
7524 relocs = TRUE;
7525
7526 /* We use the reloc_count field as a counter if we need
7527 to copy relocs into the output file. */
7528 s->reloc_count = 0;
7529 }
7530 }
7531 else
7532 {
7533 /* It's not one of our sections, so don't allocate space. */
7534 continue;
7535 }
7536
7537 if (s->size == 0)
7538 {
7539 _bfd_strip_section_from_output (info, s);
7540 continue;
7541 }
7542
7543 /* .plt is in the bss section. We don't initialise it. */
7544 if (s == htab->plt)
7545 continue;
7546
7547 /* Allocate memory for the section contents. We use bfd_zalloc
7548 here in case unused entries are not reclaimed before the
7549 section's contents are written out. This should not happen,
7550 but this way if it does we get a R_PPC64_NONE reloc in .rela
7551 sections instead of garbage.
7552 We also rely on the section contents being zero when writing
7553 the GOT. */
7554 s->contents = bfd_zalloc (dynobj, s->size);
7555 if (s->contents == NULL)
7556 return FALSE;
7557 }
7558
7559 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7560 {
7561 if (!is_ppc64_elf_target (ibfd->xvec))
7562 continue;
7563
7564 s = ppc64_elf_tdata (ibfd)->got;
7565 if (s != NULL && s != htab->got)
7566 {
7567 if (s->size == 0)
7568 _bfd_strip_section_from_output (info, s);
7569 else
7570 {
7571 s->contents = bfd_zalloc (ibfd, s->size);
7572 if (s->contents == NULL)
7573 return FALSE;
7574 }
7575 }
7576 s = ppc64_elf_tdata (ibfd)->relgot;
7577 if (s != NULL)
7578 {
7579 if (s->size == 0)
7580 _bfd_strip_section_from_output (info, s);
7581 else
7582 {
7583 s->contents = bfd_zalloc (ibfd, s->size);
7584 if (s->contents == NULL)
7585 return FALSE;
7586 relocs = TRUE;
7587 s->reloc_count = 0;
7588 }
7589 }
7590 }
7591
7592 if (htab->elf.dynamic_sections_created)
7593 {
7594 /* Add some entries to the .dynamic section. We fill in the
7595 values later, in ppc64_elf_finish_dynamic_sections, but we
7596 must add the entries now so that we get the correct size for
7597 the .dynamic section. The DT_DEBUG entry is filled in by the
7598 dynamic linker and used by the debugger. */
7599 #define add_dynamic_entry(TAG, VAL) \
7600 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7601
7602 if (info->executable)
7603 {
7604 if (!add_dynamic_entry (DT_DEBUG, 0))
7605 return FALSE;
7606 }
7607
7608 if (htab->plt != NULL && htab->plt->size != 0)
7609 {
7610 if (!add_dynamic_entry (DT_PLTGOT, 0)
7611 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7612 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7613 || !add_dynamic_entry (DT_JMPREL, 0)
7614 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7615 return FALSE;
7616 }
7617
7618 if (NO_OPD_RELOCS)
7619 {
7620 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7621 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7622 return FALSE;
7623 }
7624
7625 if (relocs)
7626 {
7627 if (!add_dynamic_entry (DT_RELA, 0)
7628 || !add_dynamic_entry (DT_RELASZ, 0)
7629 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7630 return FALSE;
7631
7632 /* If any dynamic relocs apply to a read-only section,
7633 then we need a DT_TEXTREL entry. */
7634 if ((info->flags & DF_TEXTREL) == 0)
7635 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7636
7637 if ((info->flags & DF_TEXTREL) != 0)
7638 {
7639 if (!add_dynamic_entry (DT_TEXTREL, 0))
7640 return FALSE;
7641 }
7642 }
7643 }
7644 #undef add_dynamic_entry
7645
7646 return TRUE;
7647 }
7648
7649 /* Determine the type of stub needed, if any, for a call. */
7650
7651 static inline enum ppc_stub_type
7652 ppc_type_of_stub (asection *input_sec,
7653 const Elf_Internal_Rela *rel,
7654 struct ppc_link_hash_entry **hash,
7655 bfd_vma destination)
7656 {
7657 struct ppc_link_hash_entry *h = *hash;
7658 bfd_vma location;
7659 bfd_vma branch_offset;
7660 bfd_vma max_branch_offset;
7661 enum elf_ppc64_reloc_type r_type;
7662
7663 if (h != NULL)
7664 {
7665 if (h->oh != NULL
7666 && h->oh->is_func_descriptor)
7667 h = h->oh;
7668
7669 if (h->elf.dynindx != -1)
7670 {
7671 struct plt_entry *ent;
7672
7673 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7674 if (ent->addend == rel->r_addend
7675 && ent->plt.offset != (bfd_vma) -1)
7676 {
7677 *hash = h;
7678 return ppc_stub_plt_call;
7679 }
7680 }
7681
7682 if (!(h->elf.root.type == bfd_link_hash_defined
7683 || h->elf.root.type == bfd_link_hash_defweak)
7684 || h->elf.root.u.def.section->output_section == NULL)
7685 return ppc_stub_none;
7686 }
7687
7688 /* Determine where the call point is. */
7689 location = (input_sec->output_offset
7690 + input_sec->output_section->vma
7691 + rel->r_offset);
7692
7693 branch_offset = destination - location;
7694 r_type = ELF64_R_TYPE (rel->r_info);
7695
7696 /* Determine if a long branch stub is needed. */
7697 max_branch_offset = 1 << 25;
7698 if (r_type != R_PPC64_REL24)
7699 max_branch_offset = 1 << 15;
7700
7701 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7702 /* We need a stub. Figure out whether a long_branch or plt_branch
7703 is needed later. */
7704 return ppc_stub_long_branch;
7705
7706 return ppc_stub_none;
7707 }
7708
7709 /* Build a .plt call stub. */
7710
7711 static inline bfd_byte *
7712 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7713 {
7714 #define PPC_LO(v) ((v) & 0xffff)
7715 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7716 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7717
7718 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7719 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7720 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7721 if (PPC_HA (offset + 8) != PPC_HA (offset))
7722 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7723 offset += 8;
7724 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7725 if (PPC_HA (offset + 8) != PPC_HA (offset))
7726 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7727 offset += 8;
7728 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7729 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7730 bfd_put_32 (obfd, BCTR, p), p += 4;
7731 return p;
7732 }
7733
7734 static bfd_boolean
7735 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7736 {
7737 struct ppc_stub_hash_entry *stub_entry;
7738 struct ppc_branch_hash_entry *br_entry;
7739 struct bfd_link_info *info;
7740 struct ppc_link_hash_table *htab;
7741 bfd_byte *loc;
7742 bfd_byte *p;
7743 unsigned int indx;
7744 struct plt_entry *ent;
7745 bfd_vma dest, off;
7746 int size;
7747
7748 /* Massage our args to the form they really have. */
7749 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7750 info = in_arg;
7751
7752 htab = ppc_hash_table (info);
7753
7754 /* Make a note of the offset within the stubs for this entry. */
7755 stub_entry->stub_offset = stub_entry->stub_sec->size;
7756 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7757
7758 htab->stub_count[stub_entry->stub_type - 1] += 1;
7759 switch (stub_entry->stub_type)
7760 {
7761 case ppc_stub_long_branch:
7762 case ppc_stub_long_branch_r2off:
7763 /* Branches are relative. This is where we are going to. */
7764 off = dest = (stub_entry->target_value
7765 + stub_entry->target_section->output_offset
7766 + stub_entry->target_section->output_section->vma);
7767
7768 /* And this is where we are coming from. */
7769 off -= (stub_entry->stub_offset
7770 + stub_entry->stub_sec->output_offset
7771 + stub_entry->stub_sec->output_section->vma);
7772
7773 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7774 size = 4;
7775 else
7776 {
7777 bfd_vma r2off;
7778
7779 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7780 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7781 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7782 loc += 4;
7783 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7784 loc += 4;
7785 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7786 loc += 4;
7787 off -= 12;
7788 size = 16;
7789 }
7790 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7791
7792 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7793
7794 if (info->emitrelocations)
7795 {
7796 Elf_Internal_Rela *relocs, *r;
7797 struct bfd_elf_section_data *elfsec_data;
7798
7799 elfsec_data = elf_section_data (stub_entry->stub_sec);
7800 relocs = elfsec_data->relocs;
7801 if (relocs == NULL)
7802 {
7803 bfd_size_type relsize;
7804 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7805 relocs = bfd_alloc (htab->stub_bfd, relsize);
7806 if (relocs == NULL)
7807 return FALSE;
7808 elfsec_data->relocs = relocs;
7809 elfsec_data->rel_hdr.sh_size = relsize;
7810 elfsec_data->rel_hdr.sh_entsize = 24;
7811 stub_entry->stub_sec->reloc_count = 0;
7812 }
7813 r = relocs + stub_entry->stub_sec->reloc_count;
7814 stub_entry->stub_sec->reloc_count += 1;
7815 r->r_offset = loc - stub_entry->stub_sec->contents;
7816 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7817 r->r_addend = dest;
7818 if (stub_entry->h != NULL)
7819 {
7820 struct elf_link_hash_entry **hashes;
7821 unsigned long symndx;
7822 struct ppc_link_hash_entry *h;
7823
7824 hashes = elf_sym_hashes (htab->stub_bfd);
7825 if (hashes == NULL)
7826 {
7827 bfd_size_type hsize;
7828
7829 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7830 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7831 if (hashes == NULL)
7832 return FALSE;
7833 elf_sym_hashes (htab->stub_bfd) = hashes;
7834 htab->stub_globals = 1;
7835 }
7836 symndx = htab->stub_globals++;
7837 h = stub_entry->h;
7838 hashes[symndx] = &h->elf;
7839 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7840 if (h->oh != NULL && h->oh->is_func)
7841 h = h->oh;
7842 if (h->elf.root.u.def.section != stub_entry->target_section)
7843 /* H is an opd symbol. The addend must be zero. */
7844 r->r_addend = 0;
7845 else
7846 {
7847 off = (h->elf.root.u.def.value
7848 + h->elf.root.u.def.section->output_offset
7849 + h->elf.root.u.def.section->output_section->vma);
7850 r->r_addend -= off;
7851 }
7852 }
7853 }
7854 break;
7855
7856 case ppc_stub_plt_branch:
7857 case ppc_stub_plt_branch_r2off:
7858 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7859 stub_entry->root.string + 9,
7860 FALSE, FALSE);
7861 if (br_entry == NULL)
7862 {
7863 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7864 stub_entry->root.string + 9);
7865 htab->stub_error = TRUE;
7866 return FALSE;
7867 }
7868
7869 off = (stub_entry->target_value
7870 + stub_entry->target_section->output_offset
7871 + stub_entry->target_section->output_section->vma);
7872
7873 bfd_put_64 (htab->brlt->owner, off,
7874 htab->brlt->contents + br_entry->offset);
7875
7876 if (htab->relbrlt != NULL)
7877 {
7878 /* Create a reloc for the branch lookup table entry. */
7879 Elf_Internal_Rela rela;
7880 bfd_byte *rl;
7881
7882 rela.r_offset = (br_entry->offset
7883 + htab->brlt->output_offset
7884 + htab->brlt->output_section->vma);
7885 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7886 rela.r_addend = off;
7887
7888 rl = htab->relbrlt->contents;
7889 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7890 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7891 }
7892
7893 off = (br_entry->offset
7894 + htab->brlt->output_offset
7895 + htab->brlt->output_section->vma
7896 - elf_gp (htab->brlt->output_section->owner)
7897 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7898
7899 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7900 {
7901 (*_bfd_error_handler)
7902 (_("linkage table error against `%s'"),
7903 stub_entry->root.string);
7904 bfd_set_error (bfd_error_bad_value);
7905 htab->stub_error = TRUE;
7906 return FALSE;
7907 }
7908
7909 indx = off;
7910 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7911 {
7912 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7913 loc += 4;
7914 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7915 size = 16;
7916 }
7917 else
7918 {
7919 bfd_vma r2off;
7920
7921 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7922 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7923 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7924 loc += 4;
7925 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7926 loc += 4;
7927 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7928 loc += 4;
7929 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7930 loc += 4;
7931 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7932 size = 28;
7933 }
7934 loc += 4;
7935 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7936 loc += 4;
7937 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7938 break;
7939
7940 case ppc_stub_plt_call:
7941 /* Do the best we can for shared libraries built without
7942 exporting ".foo" for each "foo". This can happen when symbol
7943 versioning scripts strip all bar a subset of symbols. */
7944 if (stub_entry->h->oh != NULL
7945 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7946 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7947 {
7948 /* Point the symbol at the stub. There may be multiple stubs,
7949 we don't really care; The main thing is to make this sym
7950 defined somewhere. Maybe defining the symbol in the stub
7951 section is a silly idea. If we didn't do this, htab->top_id
7952 could disappear. */
7953 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7954 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7955 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7956 }
7957
7958 /* Now build the stub. */
7959 off = (bfd_vma) -1;
7960 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7961 if (ent->addend == stub_entry->addend)
7962 {
7963 off = ent->plt.offset;
7964 break;
7965 }
7966 if (off >= (bfd_vma) -2)
7967 abort ();
7968
7969 off &= ~ (bfd_vma) 1;
7970 off += (htab->plt->output_offset
7971 + htab->plt->output_section->vma
7972 - elf_gp (htab->plt->output_section->owner)
7973 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7974
7975 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7976 {
7977 (*_bfd_error_handler)
7978 (_("linkage table error against `%s'"),
7979 stub_entry->h->elf.root.root.string);
7980 bfd_set_error (bfd_error_bad_value);
7981 htab->stub_error = TRUE;
7982 return FALSE;
7983 }
7984
7985 p = build_plt_stub (htab->stub_bfd, loc, off);
7986 size = p - loc;
7987 break;
7988
7989 default:
7990 BFD_FAIL ();
7991 return FALSE;
7992 }
7993
7994 stub_entry->stub_sec->size += size;
7995
7996 if (htab->emit_stub_syms)
7997 {
7998 struct elf_link_hash_entry *h;
7999 size_t len1, len2;
8000 char *name;
8001 const char *const stub_str[] = { "long_branch",
8002 "long_branch_r2off",
8003 "plt_branch",
8004 "plt_branch_r2off",
8005 "plt_call" };
8006
8007 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8008 len2 = strlen (stub_entry->root.string);
8009 name = bfd_malloc (len1 + len2 + 2);
8010 if (name == NULL)
8011 return FALSE;
8012 memcpy (name, stub_entry->root.string, 9);
8013 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8014 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8015 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8016 if (h == NULL)
8017 return FALSE;
8018 if (h->root.type == bfd_link_hash_new)
8019 {
8020 h->root.type = bfd_link_hash_defined;
8021 h->root.u.def.section = stub_entry->stub_sec;
8022 h->root.u.def.value = stub_entry->stub_offset;
8023 h->ref_regular = 1;
8024 h->def_regular = 1;
8025 h->ref_regular_nonweak = 1;
8026 h->forced_local = 1;
8027 h->non_elf = 0;
8028 }
8029 }
8030
8031 return TRUE;
8032 }
8033
8034 /* As above, but don't actually build the stub. Just bump offset so
8035 we know stub section sizes, and select plt_branch stubs where
8036 long_branch stubs won't do. */
8037
8038 static bfd_boolean
8039 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8040 {
8041 struct ppc_stub_hash_entry *stub_entry;
8042 struct bfd_link_info *info;
8043 struct ppc_link_hash_table *htab;
8044 bfd_vma off;
8045 int size;
8046
8047 /* Massage our args to the form they really have. */
8048 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8049 info = in_arg;
8050
8051 htab = ppc_hash_table (info);
8052
8053 if (stub_entry->stub_type == ppc_stub_plt_call)
8054 {
8055 struct plt_entry *ent;
8056 off = (bfd_vma) -1;
8057 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8058 if (ent->addend == stub_entry->addend)
8059 {
8060 off = ent->plt.offset & ~(bfd_vma) 1;
8061 break;
8062 }
8063 if (off >= (bfd_vma) -2)
8064 abort ();
8065 off += (htab->plt->output_offset
8066 + htab->plt->output_section->vma
8067 - elf_gp (htab->plt->output_section->owner)
8068 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8069
8070 size = PLT_CALL_STUB_SIZE;
8071 if (PPC_HA (off + 16) != PPC_HA (off))
8072 size += 4;
8073 }
8074 else
8075 {
8076 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8077 variants. */
8078 off = (stub_entry->target_value
8079 + stub_entry->target_section->output_offset
8080 + stub_entry->target_section->output_section->vma);
8081 off -= (stub_entry->stub_sec->size
8082 + stub_entry->stub_sec->output_offset
8083 + stub_entry->stub_sec->output_section->vma);
8084
8085 /* Reset the stub type from the plt variant in case we now
8086 can reach with a shorter stub. */
8087 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8088 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8089
8090 size = 4;
8091 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8092 {
8093 off -= 12;
8094 size = 16;
8095 }
8096
8097 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8098 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8099 {
8100 struct ppc_branch_hash_entry *br_entry;
8101
8102 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8103 stub_entry->root.string + 9,
8104 TRUE, FALSE);
8105 if (br_entry == NULL)
8106 {
8107 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8108 stub_entry->root.string + 9);
8109 htab->stub_error = TRUE;
8110 return FALSE;
8111 }
8112
8113 if (br_entry->iter != htab->stub_iteration)
8114 {
8115 br_entry->iter = htab->stub_iteration;
8116 br_entry->offset = htab->brlt->size;
8117 htab->brlt->size += 8;
8118
8119 if (htab->relbrlt != NULL)
8120 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8121 }
8122
8123 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8124 size = 16;
8125 if (stub_entry->stub_type != ppc_stub_plt_branch)
8126 size = 28;
8127 }
8128
8129 if (info->emitrelocations
8130 && (stub_entry->stub_type == ppc_stub_long_branch
8131 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8132 stub_entry->stub_sec->reloc_count += 1;
8133 }
8134
8135 stub_entry->stub_sec->size += size;
8136 return TRUE;
8137 }
8138
8139 /* Set up various things so that we can make a list of input sections
8140 for each output section included in the link. Returns -1 on error,
8141 0 when no stubs will be needed, and 1 on success. */
8142
8143 int
8144 ppc64_elf_setup_section_lists (bfd *output_bfd,
8145 struct bfd_link_info *info,
8146 int no_multi_toc)
8147 {
8148 bfd *input_bfd;
8149 int top_id, top_index, id;
8150 asection *section;
8151 asection **input_list;
8152 bfd_size_type amt;
8153 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8154
8155 htab->no_multi_toc = no_multi_toc;
8156
8157 if (htab->brlt == NULL)
8158 return 0;
8159
8160 /* Find the top input section id. */
8161 for (input_bfd = info->input_bfds, top_id = 3;
8162 input_bfd != NULL;
8163 input_bfd = input_bfd->link_next)
8164 {
8165 for (section = input_bfd->sections;
8166 section != NULL;
8167 section = section->next)
8168 {
8169 if (top_id < section->id)
8170 top_id = section->id;
8171 }
8172 }
8173
8174 htab->top_id = top_id;
8175 amt = sizeof (struct map_stub) * (top_id + 1);
8176 htab->stub_group = bfd_zmalloc (amt);
8177 if (htab->stub_group == NULL)
8178 return -1;
8179
8180 /* Set toc_off for com, und, abs and ind sections. */
8181 for (id = 0; id < 3; id++)
8182 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8183
8184 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8185
8186 /* We can't use output_bfd->section_count here to find the top output
8187 section index as some sections may have been removed, and
8188 _bfd_strip_section_from_output doesn't renumber the indices. */
8189 for (section = output_bfd->sections, top_index = 0;
8190 section != NULL;
8191 section = section->next)
8192 {
8193 if (top_index < section->index)
8194 top_index = section->index;
8195 }
8196
8197 htab->top_index = top_index;
8198 amt = sizeof (asection *) * (top_index + 1);
8199 input_list = bfd_zmalloc (amt);
8200 htab->input_list = input_list;
8201 if (input_list == NULL)
8202 return -1;
8203
8204 return 1;
8205 }
8206
8207 /* The linker repeatedly calls this function for each TOC input section
8208 and linker generated GOT section. Group input bfds such that the toc
8209 within a group is less than 64k in size. Will break with cute linker
8210 scripts that play games with dot in the output toc section. */
8211
8212 void
8213 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8214 {
8215 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8216
8217 if (!htab->no_multi_toc)
8218 {
8219 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8220 bfd_vma off = addr - htab->toc_curr;
8221
8222 if (off + isec->size > 0x10000)
8223 htab->toc_curr = addr;
8224
8225 elf_gp (isec->owner) = (htab->toc_curr
8226 - elf_gp (isec->output_section->owner)
8227 + TOC_BASE_OFF);
8228 }
8229 }
8230
8231 /* Called after the last call to the above function. */
8232
8233 void
8234 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8235 {
8236 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8237
8238 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8239
8240 /* toc_curr tracks the TOC offset used for code sections below in
8241 ppc64_elf_next_input_section. Start off at 0x8000. */
8242 htab->toc_curr = TOC_BASE_OFF;
8243 }
8244
8245 /* No toc references were found in ISEC. If the code in ISEC makes no
8246 calls, then there's no need to use toc adjusting stubs when branching
8247 into ISEC. Actually, indirect calls from ISEC are OK as they will
8248 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8249 needed, and 2 if a cyclical call-graph was found but no other reason
8250 for a stub was detected. If called from the top level, a return of
8251 2 means the same as a return of 0. */
8252
8253 static int
8254 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8255 {
8256 Elf_Internal_Rela *relstart, *rel;
8257 Elf_Internal_Sym *local_syms;
8258 int ret;
8259 struct ppc_link_hash_table *htab;
8260
8261 /* We know none of our code bearing sections will need toc stubs. */
8262 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8263 return 0;
8264
8265 if (isec->size == 0)
8266 return 0;
8267
8268 if (isec->output_section == NULL)
8269 return 0;
8270
8271 /* Hack for linux kernel. .fixup contains branches, but only back to
8272 the function that hit an exception. */
8273 if (strcmp (isec->name, ".fixup") == 0)
8274 return 0;
8275
8276 if (isec->reloc_count == 0)
8277 return 0;
8278
8279 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8280 info->keep_memory);
8281 if (relstart == NULL)
8282 return -1;
8283
8284 /* Look for branches to outside of this section. */
8285 local_syms = NULL;
8286 ret = 0;
8287 htab = ppc_hash_table (info);
8288 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8289 {
8290 enum elf_ppc64_reloc_type r_type;
8291 unsigned long r_symndx;
8292 struct elf_link_hash_entry *h;
8293 Elf_Internal_Sym *sym;
8294 asection *sym_sec;
8295 long *opd_adjust;
8296 bfd_vma sym_value;
8297 bfd_vma dest;
8298
8299 r_type = ELF64_R_TYPE (rel->r_info);
8300 if (r_type != R_PPC64_REL24
8301 && r_type != R_PPC64_REL14
8302 && r_type != R_PPC64_REL14_BRTAKEN
8303 && r_type != R_PPC64_REL14_BRNTAKEN)
8304 continue;
8305
8306 r_symndx = ELF64_R_SYM (rel->r_info);
8307 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8308 isec->owner))
8309 {
8310 ret = -1;
8311 break;
8312 }
8313
8314 /* Ignore branches to undefined syms. */
8315 if (sym_sec == NULL)
8316 continue;
8317
8318 /* Calls to dynamic lib functions go through a plt call stub
8319 that uses r2. Assume branches to other sections not included
8320 in the link need stubs too, to cover -R and absolute syms. */
8321 if (sym_sec->output_section == NULL)
8322 {
8323 ret = 1;
8324 break;
8325 }
8326
8327 if (h == NULL)
8328 sym_value = sym->st_value;
8329 else
8330 {
8331 if (h->root.type != bfd_link_hash_defined
8332 && h->root.type != bfd_link_hash_defweak)
8333 abort ();
8334 sym_value = h->root.u.def.value;
8335 }
8336 sym_value += rel->r_addend;
8337
8338 /* If this branch reloc uses an opd sym, find the code section. */
8339 opd_adjust = get_opd_info (sym_sec);
8340 if (opd_adjust != NULL)
8341 {
8342
8343 if (h == NULL)
8344 {
8345 long adjust;
8346
8347 adjust = opd_adjust[sym->st_value / 8];
8348 if (adjust == -1)
8349 /* Assume deleted functions won't ever be called. */
8350 continue;
8351 sym_value += adjust;
8352 }
8353
8354 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8355 if (dest == (bfd_vma) -1)
8356 continue;
8357 }
8358 else
8359 dest = (sym_value
8360 + sym_sec->output_offset
8361 + sym_sec->output_section->vma);
8362
8363 /* Ignore branch to self. */
8364 if (sym_sec == isec)
8365 continue;
8366
8367 /* If the called function uses the toc, we need a stub. */
8368 if (sym_sec->has_toc_reloc
8369 || sym_sec->makes_toc_func_call)
8370 {
8371 ret = 1;
8372 break;
8373 }
8374
8375 /* Assume any branch that needs a long branch stub might in fact
8376 need a plt_branch stub. A plt_branch stub uses r2. */
8377 else if (dest - (isec->output_offset
8378 + isec->output_section->vma
8379 + rel->r_offset) + (1 << 25) >= (2 << 25))
8380 {
8381 ret = 1;
8382 break;
8383 }
8384
8385 /* If calling back to a section in the process of being tested, we
8386 can't say for sure that no toc adjusting stubs are needed, so
8387 don't return zero. */
8388 else if (sym_sec->call_check_in_progress)
8389 ret = 2;
8390
8391 /* Branches to another section that itself doesn't have any TOC
8392 references are OK. Recursively call ourselves to check. */
8393 else if (sym_sec->id <= htab->top_id
8394 && htab->stub_group[sym_sec->id].toc_off == 0)
8395 {
8396 int recur;
8397
8398 /* Mark current section as indeterminate, so that other
8399 sections that call back to current won't be marked as
8400 known. */
8401 isec->call_check_in_progress = 1;
8402 recur = toc_adjusting_stub_needed (info, sym_sec);
8403 isec->call_check_in_progress = 0;
8404
8405 if (recur < 0)
8406 {
8407 /* An error. Exit. */
8408 ret = -1;
8409 break;
8410 }
8411 else if (recur <= 1)
8412 {
8413 /* Known result. Mark as checked and set section flag. */
8414 htab->stub_group[sym_sec->id].toc_off = 1;
8415 if (recur != 0)
8416 {
8417 sym_sec->makes_toc_func_call = 1;
8418 ret = 1;
8419 break;
8420 }
8421 }
8422 else
8423 {
8424 /* Unknown result. Continue checking. */
8425 ret = 2;
8426 }
8427 }
8428 }
8429
8430 if (local_syms != NULL
8431 && (elf_tdata (isec->owner)->symtab_hdr.contents
8432 != (unsigned char *) local_syms))
8433 free (local_syms);
8434 if (elf_section_data (isec)->relocs != relstart)
8435 free (relstart);
8436
8437 return ret;
8438 }
8439
8440 /* The linker repeatedly calls this function for each input section,
8441 in the order that input sections are linked into output sections.
8442 Build lists of input sections to determine groupings between which
8443 we may insert linker stubs. */
8444
8445 bfd_boolean
8446 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8447 {
8448 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8449
8450 if ((isec->output_section->flags & SEC_CODE) != 0
8451 && isec->output_section->index <= htab->top_index)
8452 {
8453 asection **list = htab->input_list + isec->output_section->index;
8454 /* Steal the link_sec pointer for our list. */
8455 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8456 /* This happens to make the list in reverse order,
8457 which is what we want. */
8458 PREV_SEC (isec) = *list;
8459 *list = isec;
8460 }
8461
8462 if (htab->multi_toc_needed)
8463 {
8464 /* If a code section has a function that uses the TOC then we need
8465 to use the right TOC (obviously). Also, make sure that .opd gets
8466 the correct TOC value for R_PPC64_TOC relocs that don't have or
8467 can't find their function symbol (shouldn't ever happen now). */
8468 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8469 {
8470 if (elf_gp (isec->owner) != 0)
8471 htab->toc_curr = elf_gp (isec->owner);
8472 }
8473 else if (htab->stub_group[isec->id].toc_off == 0)
8474 {
8475 int ret = toc_adjusting_stub_needed (info, isec);
8476 if (ret < 0)
8477 return FALSE;
8478 else
8479 isec->makes_toc_func_call = ret & 1;
8480 }
8481 }
8482
8483 /* Functions that don't use the TOC can belong in any TOC group.
8484 Use the last TOC base. This happens to make _init and _fini
8485 pasting work. */
8486 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8487 return TRUE;
8488 }
8489
8490 /* See whether we can group stub sections together. Grouping stub
8491 sections may result in fewer stubs. More importantly, we need to
8492 put all .init* and .fini* stubs at the beginning of the .init or
8493 .fini output sections respectively, because glibc splits the
8494 _init and _fini functions into multiple parts. Putting a stub in
8495 the middle of a function is not a good idea. */
8496
8497 static void
8498 group_sections (struct ppc_link_hash_table *htab,
8499 bfd_size_type stub_group_size,
8500 bfd_boolean stubs_always_before_branch)
8501 {
8502 asection **list = htab->input_list + htab->top_index;
8503 do
8504 {
8505 asection *tail = *list;
8506 while (tail != NULL)
8507 {
8508 asection *curr;
8509 asection *prev;
8510 bfd_size_type total;
8511 bfd_boolean big_sec;
8512 bfd_vma curr_toc;
8513
8514 curr = tail;
8515 total = tail->size;
8516 big_sec = total >= stub_group_size;
8517 curr_toc = htab->stub_group[tail->id].toc_off;
8518
8519 while ((prev = PREV_SEC (curr)) != NULL
8520 && ((total += curr->output_offset - prev->output_offset)
8521 < stub_group_size)
8522 && htab->stub_group[prev->id].toc_off == curr_toc)
8523 curr = prev;
8524
8525 /* OK, the size from the start of CURR to the end is less
8526 than stub_group_size and thus can be handled by one stub
8527 section. (or the tail section is itself larger than
8528 stub_group_size, in which case we may be toast.) We
8529 should really be keeping track of the total size of stubs
8530 added here, as stubs contribute to the final output
8531 section size. That's a little tricky, and this way will
8532 only break if stubs added make the total size more than
8533 2^25, ie. for the default stub_group_size, if stubs total
8534 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8535 do
8536 {
8537 prev = PREV_SEC (tail);
8538 /* Set up this stub group. */
8539 htab->stub_group[tail->id].link_sec = curr;
8540 }
8541 while (tail != curr && (tail = prev) != NULL);
8542
8543 /* But wait, there's more! Input sections up to stub_group_size
8544 bytes before the stub section can be handled by it too.
8545 Don't do this if we have a really large section after the
8546 stubs, as adding more stubs increases the chance that
8547 branches may not reach into the stub section. */
8548 if (!stubs_always_before_branch && !big_sec)
8549 {
8550 total = 0;
8551 while (prev != NULL
8552 && ((total += tail->output_offset - prev->output_offset)
8553 < stub_group_size)
8554 && htab->stub_group[prev->id].toc_off == curr_toc)
8555 {
8556 tail = prev;
8557 prev = PREV_SEC (tail);
8558 htab->stub_group[tail->id].link_sec = curr;
8559 }
8560 }
8561 tail = prev;
8562 }
8563 }
8564 while (list-- != htab->input_list);
8565 free (htab->input_list);
8566 #undef PREV_SEC
8567 }
8568
8569 /* Determine and set the size of the stub section for a final link.
8570
8571 The basic idea here is to examine all the relocations looking for
8572 PC-relative calls to a target that is unreachable with a "bl"
8573 instruction. */
8574
8575 bfd_boolean
8576 ppc64_elf_size_stubs (bfd *output_bfd,
8577 struct bfd_link_info *info,
8578 bfd_signed_vma group_size,
8579 asection *(*add_stub_section) (const char *, asection *),
8580 void (*layout_sections_again) (void))
8581 {
8582 bfd_size_type stub_group_size;
8583 bfd_boolean stubs_always_before_branch;
8584 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8585
8586 /* Stash our params away. */
8587 htab->add_stub_section = add_stub_section;
8588 htab->layout_sections_again = layout_sections_again;
8589 stubs_always_before_branch = group_size < 0;
8590 if (group_size < 0)
8591 stub_group_size = -group_size;
8592 else
8593 stub_group_size = group_size;
8594 if (stub_group_size == 1)
8595 {
8596 /* Default values. */
8597 if (stubs_always_before_branch)
8598 {
8599 stub_group_size = 0x1e00000;
8600 if (htab->has_14bit_branch)
8601 stub_group_size = 0x7800;
8602 }
8603 else
8604 {
8605 stub_group_size = 0x1c00000;
8606 if (htab->has_14bit_branch)
8607 stub_group_size = 0x7000;
8608 }
8609 }
8610
8611 group_sections (htab, stub_group_size, stubs_always_before_branch);
8612
8613 while (1)
8614 {
8615 bfd *input_bfd;
8616 unsigned int bfd_indx;
8617 asection *stub_sec;
8618 bfd_boolean stub_changed;
8619
8620 htab->stub_iteration += 1;
8621 stub_changed = FALSE;
8622
8623 for (input_bfd = info->input_bfds, bfd_indx = 0;
8624 input_bfd != NULL;
8625 input_bfd = input_bfd->link_next, bfd_indx++)
8626 {
8627 Elf_Internal_Shdr *symtab_hdr;
8628 asection *section;
8629 Elf_Internal_Sym *local_syms = NULL;
8630
8631 /* We'll need the symbol table in a second. */
8632 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8633 if (symtab_hdr->sh_info == 0)
8634 continue;
8635
8636 /* Walk over each section attached to the input bfd. */
8637 for (section = input_bfd->sections;
8638 section != NULL;
8639 section = section->next)
8640 {
8641 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8642
8643 /* If there aren't any relocs, then there's nothing more
8644 to do. */
8645 if ((section->flags & SEC_RELOC) == 0
8646 || section->reloc_count == 0)
8647 continue;
8648
8649 /* If this section is a link-once section that will be
8650 discarded, then don't create any stubs. */
8651 if (section->output_section == NULL
8652 || section->output_section->owner != output_bfd)
8653 continue;
8654
8655 /* Get the relocs. */
8656 internal_relocs
8657 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8658 info->keep_memory);
8659 if (internal_relocs == NULL)
8660 goto error_ret_free_local;
8661
8662 /* Now examine each relocation. */
8663 irela = internal_relocs;
8664 irelaend = irela + section->reloc_count;
8665 for (; irela < irelaend; irela++)
8666 {
8667 enum elf_ppc64_reloc_type r_type;
8668 unsigned int r_indx;
8669 enum ppc_stub_type stub_type;
8670 struct ppc_stub_hash_entry *stub_entry;
8671 asection *sym_sec, *code_sec;
8672 bfd_vma sym_value;
8673 bfd_vma destination;
8674 bfd_boolean ok_dest;
8675 struct ppc_link_hash_entry *hash;
8676 struct ppc_link_hash_entry *fdh;
8677 struct elf_link_hash_entry *h;
8678 Elf_Internal_Sym *sym;
8679 char *stub_name;
8680 const asection *id_sec;
8681 long *opd_adjust;
8682
8683 r_type = ELF64_R_TYPE (irela->r_info);
8684 r_indx = ELF64_R_SYM (irela->r_info);
8685
8686 if (r_type >= R_PPC64_max)
8687 {
8688 bfd_set_error (bfd_error_bad_value);
8689 goto error_ret_free_internal;
8690 }
8691
8692 /* Only look for stubs on branch instructions. */
8693 if (r_type != R_PPC64_REL24
8694 && r_type != R_PPC64_REL14
8695 && r_type != R_PPC64_REL14_BRTAKEN
8696 && r_type != R_PPC64_REL14_BRNTAKEN)
8697 continue;
8698
8699 /* Now determine the call target, its name, value,
8700 section. */
8701 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8702 r_indx, input_bfd))
8703 goto error_ret_free_internal;
8704 hash = (struct ppc_link_hash_entry *) h;
8705
8706 ok_dest = FALSE;
8707 fdh = NULL;
8708 if (hash == NULL)
8709 {
8710 sym_value = sym->st_value;
8711 ok_dest = TRUE;
8712 }
8713 else
8714 {
8715 sym_value = 0;
8716 /* Recognise an old ABI func code entry sym, and
8717 use the func descriptor sym instead. */
8718 if (hash->elf.root.type == bfd_link_hash_undefweak
8719 && hash->elf.root.root.string[0] == '.'
8720 && (fdh = get_fdh (hash, htab)) != NULL)
8721 {
8722 if (fdh->elf.root.type == bfd_link_hash_defined
8723 || fdh->elf.root.type == bfd_link_hash_defweak)
8724 {
8725 sym_sec = fdh->elf.root.u.def.section;
8726 sym_value = fdh->elf.root.u.def.value;
8727 if (sym_sec->output_section != NULL)
8728 ok_dest = TRUE;
8729 }
8730 else
8731 fdh = NULL;
8732 }
8733 else if (hash->elf.root.type == bfd_link_hash_defined
8734 || hash->elf.root.type == bfd_link_hash_defweak)
8735 {
8736 sym_value = hash->elf.root.u.def.value;
8737 if (sym_sec->output_section != NULL)
8738 ok_dest = TRUE;
8739 }
8740 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8741 ;
8742 else if (hash->elf.root.type == bfd_link_hash_undefined)
8743 ;
8744 else
8745 {
8746 bfd_set_error (bfd_error_bad_value);
8747 goto error_ret_free_internal;
8748 }
8749 }
8750
8751 destination = 0;
8752 if (ok_dest)
8753 {
8754 sym_value += irela->r_addend;
8755 destination = (sym_value
8756 + sym_sec->output_offset
8757 + sym_sec->output_section->vma);
8758 }
8759
8760 code_sec = sym_sec;
8761 opd_adjust = get_opd_info (sym_sec);
8762 if (opd_adjust != NULL)
8763 {
8764 bfd_vma dest;
8765
8766 if (hash == NULL)
8767 {
8768 long adjust = opd_adjust[sym_value / 8];
8769 if (adjust == -1)
8770 continue;
8771 sym_value += adjust;
8772 }
8773 dest = opd_entry_value (sym_sec, sym_value,
8774 &code_sec, &sym_value);
8775 if (dest != (bfd_vma) -1)
8776 {
8777 destination = dest;
8778 if (fdh != NULL)
8779 {
8780 /* Fixup old ABI sym to point at code
8781 entry. */
8782 hash->elf.root.type = bfd_link_hash_defweak;
8783 hash->elf.root.u.def.section = code_sec;
8784 hash->elf.root.u.def.value = sym_value;
8785 }
8786 }
8787 }
8788
8789 /* Determine what (if any) linker stub is needed. */
8790 stub_type = ppc_type_of_stub (section, irela, &hash,
8791 destination);
8792
8793 if (stub_type != ppc_stub_plt_call)
8794 {
8795 /* Check whether we need a TOC adjusting stub.
8796 Since the linker pastes together pieces from
8797 different object files when creating the
8798 _init and _fini functions, it may be that a
8799 call to what looks like a local sym is in
8800 fact a call needing a TOC adjustment. */
8801 if (code_sec != NULL
8802 && code_sec->output_section != NULL
8803 && (htab->stub_group[code_sec->id].toc_off
8804 != htab->stub_group[section->id].toc_off)
8805 && (code_sec->has_toc_reloc
8806 || code_sec->makes_toc_func_call))
8807 stub_type = ppc_stub_long_branch_r2off;
8808 }
8809
8810 if (stub_type == ppc_stub_none)
8811 continue;
8812
8813 /* __tls_get_addr calls might be eliminated. */
8814 if (stub_type != ppc_stub_plt_call
8815 && hash != NULL
8816 && (hash == htab->tls_get_addr
8817 || hash == htab->tls_get_addr_fd)
8818 && section->has_tls_reloc
8819 && irela != internal_relocs)
8820 {
8821 /* Get tls info. */
8822 char *tls_mask;
8823
8824 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8825 irela - 1, input_bfd))
8826 goto error_ret_free_internal;
8827 if (*tls_mask != 0)
8828 continue;
8829 }
8830
8831 /* Support for grouping stub sections. */
8832 id_sec = htab->stub_group[section->id].link_sec;
8833
8834 /* Get the name of this stub. */
8835 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8836 if (!stub_name)
8837 goto error_ret_free_internal;
8838
8839 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8840 stub_name, FALSE, FALSE);
8841 if (stub_entry != NULL)
8842 {
8843 /* The proper stub has already been created. */
8844 free (stub_name);
8845 continue;
8846 }
8847
8848 stub_entry = ppc_add_stub (stub_name, section, htab);
8849 if (stub_entry == NULL)
8850 {
8851 free (stub_name);
8852 error_ret_free_internal:
8853 if (elf_section_data (section)->relocs == NULL)
8854 free (internal_relocs);
8855 error_ret_free_local:
8856 if (local_syms != NULL
8857 && (symtab_hdr->contents
8858 != (unsigned char *) local_syms))
8859 free (local_syms);
8860 return FALSE;
8861 }
8862
8863 stub_entry->stub_type = stub_type;
8864 stub_entry->target_value = sym_value;
8865 stub_entry->target_section = code_sec;
8866 stub_entry->h = hash;
8867 stub_entry->addend = irela->r_addend;
8868
8869 if (stub_entry->h != NULL)
8870 htab->stub_globals += 1;
8871
8872 stub_changed = TRUE;
8873 }
8874
8875 /* We're done with the internal relocs, free them. */
8876 if (elf_section_data (section)->relocs != internal_relocs)
8877 free (internal_relocs);
8878 }
8879
8880 if (local_syms != NULL
8881 && symtab_hdr->contents != (unsigned char *) local_syms)
8882 {
8883 if (!info->keep_memory)
8884 free (local_syms);
8885 else
8886 symtab_hdr->contents = (unsigned char *) local_syms;
8887 }
8888 }
8889
8890 if (!stub_changed)
8891 break;
8892
8893 /* OK, we've added some stubs. Find out the new size of the
8894 stub sections. */
8895 for (stub_sec = htab->stub_bfd->sections;
8896 stub_sec != NULL;
8897 stub_sec = stub_sec->next)
8898 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8899 {
8900 stub_sec->size = 0;
8901 stub_sec->reloc_count = 0;
8902 }
8903
8904 htab->brlt->size = 0;
8905 if (htab->relbrlt != NULL)
8906 htab->relbrlt->size = 0;
8907
8908 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8909
8910 /* Ask the linker to do its stuff. */
8911 (*htab->layout_sections_again) ();
8912 }
8913
8914 /* It would be nice to strip .branch_lt from the output if the
8915 section is empty, but it's too late. If we strip sections here,
8916 the dynamic symbol table is corrupted since the section symbol
8917 for the stripped section isn't written. */
8918
8919 return TRUE;
8920 }
8921
8922 /* Called after we have determined section placement. If sections
8923 move, we'll be called again. Provide a value for TOCstart. */
8924
8925 bfd_vma
8926 ppc64_elf_toc (bfd *obfd)
8927 {
8928 asection *s;
8929 bfd_vma TOCstart;
8930
8931 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8932 order. The TOC starts where the first of these sections starts. */
8933 s = bfd_get_section_by_name (obfd, ".got");
8934 if (s == NULL)
8935 s = bfd_get_section_by_name (obfd, ".toc");
8936 if (s == NULL)
8937 s = bfd_get_section_by_name (obfd, ".tocbss");
8938 if (s == NULL)
8939 s = bfd_get_section_by_name (obfd, ".plt");
8940 if (s == NULL)
8941 {
8942 /* This may happen for
8943 o references to TOC base (SYM@toc / TOC[tc0]) without a
8944 .toc directive
8945 o bad linker script
8946 o --gc-sections and empty TOC sections
8947
8948 FIXME: Warn user? */
8949
8950 /* Look for a likely section. We probably won't even be
8951 using TOCstart. */
8952 for (s = obfd->sections; s != NULL; s = s->next)
8953 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8954 == (SEC_ALLOC | SEC_SMALL_DATA))
8955 break;
8956 if (s == NULL)
8957 for (s = obfd->sections; s != NULL; s = s->next)
8958 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8959 == (SEC_ALLOC | SEC_SMALL_DATA))
8960 break;
8961 if (s == NULL)
8962 for (s = obfd->sections; s != NULL; s = s->next)
8963 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8964 break;
8965 if (s == NULL)
8966 for (s = obfd->sections; s != NULL; s = s->next)
8967 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8968 break;
8969 }
8970
8971 TOCstart = 0;
8972 if (s != NULL)
8973 TOCstart = s->output_section->vma + s->output_offset;
8974
8975 return TOCstart;
8976 }
8977
8978 /* Build all the stubs associated with the current output file.
8979 The stubs are kept in a hash table attached to the main linker
8980 hash table. This function is called via gldelf64ppc_finish. */
8981
8982 bfd_boolean
8983 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8984 struct bfd_link_info *info,
8985 char **stats)
8986 {
8987 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8988 asection *stub_sec;
8989 bfd_byte *p;
8990 int stub_sec_count = 0;
8991
8992 htab->emit_stub_syms = emit_stub_syms;
8993
8994 /* Allocate memory to hold the linker stubs. */
8995 for (stub_sec = htab->stub_bfd->sections;
8996 stub_sec != NULL;
8997 stub_sec = stub_sec->next)
8998 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
8999 && stub_sec->size != 0)
9000 {
9001 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9002 if (stub_sec->contents == NULL)
9003 return FALSE;
9004 /* We want to check that built size is the same as calculated
9005 size. rawsize is a convenient location to use. */
9006 stub_sec->rawsize = stub_sec->size;
9007 stub_sec->size = 0;
9008 }
9009
9010 if (htab->plt != NULL)
9011 {
9012 unsigned int indx;
9013 bfd_vma plt0;
9014
9015 /* Build the .glink plt call stub. */
9016 plt0 = (htab->plt->output_section->vma
9017 + htab->plt->output_offset
9018 - (htab->glink->output_section->vma
9019 + htab->glink->output_offset
9020 + GLINK_CALL_STUB_SIZE));
9021 if (plt0 + 0x80008000 > 0xffffffff)
9022 {
9023 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9024 bfd_set_error (bfd_error_bad_value);
9025 return FALSE;
9026 }
9027
9028 if (htab->emit_stub_syms)
9029 {
9030 struct elf_link_hash_entry *h;
9031 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9032 if (h == NULL)
9033 return FALSE;
9034 if (h->root.type == bfd_link_hash_new)
9035 {
9036 h->root.type = bfd_link_hash_defined;
9037 h->root.u.def.section = htab->glink;
9038 h->root.u.def.value = 0;
9039 h->ref_regular = 1;
9040 h->def_regular = 1;
9041 h->ref_regular_nonweak = 1;
9042 h->forced_local = 1;
9043 h->non_elf = 0;
9044 }
9045 }
9046 p = htab->glink->contents;
9047 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9048 p += 4;
9049 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9050 p += 4;
9051 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9052 p += 4;
9053 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9054 p += 4;
9055 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9056 p += 4;
9057 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9058 p += 4;
9059 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9060 p += 4;
9061 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9062 p += 4;
9063 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9064 p += 4;
9065 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9066 p += 4;
9067 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9068 p += 4;
9069 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9070 p += 4;
9071 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9072 p += 4;
9073 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9074 p += 4;
9075 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9076 p += 4;
9077 bfd_put_32 (htab->glink->owner, BCTR, p);
9078 p += 4;
9079
9080 /* Build the .glink lazy link call stubs. */
9081 indx = 0;
9082 while (p < htab->glink->contents + htab->glink->size)
9083 {
9084 if (indx < 0x8000)
9085 {
9086 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9087 p += 4;
9088 }
9089 else
9090 {
9091 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9092 p += 4;
9093 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9094 p += 4;
9095 }
9096 bfd_put_32 (htab->glink->owner,
9097 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9098 indx++;
9099 p += 4;
9100 }
9101 htab->glink->rawsize = p - htab->glink->contents;
9102 }
9103
9104 if (htab->brlt->size != 0)
9105 {
9106 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9107 htab->brlt->size);
9108 if (htab->brlt->contents == NULL)
9109 return FALSE;
9110 }
9111 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9112 {
9113 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9114 htab->relbrlt->size);
9115 if (htab->relbrlt->contents == NULL)
9116 return FALSE;
9117 }
9118
9119 /* Build the stubs as directed by the stub hash table. */
9120 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9121
9122 for (stub_sec = htab->stub_bfd->sections;
9123 stub_sec != NULL;
9124 stub_sec = stub_sec->next)
9125 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9126 {
9127 stub_sec_count += 1;
9128 if (stub_sec->rawsize != stub_sec->size)
9129 break;
9130 }
9131
9132 if (stub_sec != NULL
9133 || htab->glink->rawsize != htab->glink->size)
9134 {
9135 htab->stub_error = TRUE;
9136 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9137 }
9138
9139 if (htab->stub_error)
9140 return FALSE;
9141
9142 if (stats != NULL)
9143 {
9144 *stats = bfd_malloc (500);
9145 if (*stats == NULL)
9146 return FALSE;
9147
9148 sprintf (*stats, _("linker stubs in %u group%s\n"
9149 " branch %lu\n"
9150 " toc adjust %lu\n"
9151 " long branch %lu\n"
9152 " long toc adj %lu\n"
9153 " plt call %lu"),
9154 stub_sec_count,
9155 stub_sec_count == 1 ? "" : "s",
9156 htab->stub_count[ppc_stub_long_branch - 1],
9157 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9158 htab->stub_count[ppc_stub_plt_branch - 1],
9159 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9160 htab->stub_count[ppc_stub_plt_call - 1]);
9161 }
9162 return TRUE;
9163 }
9164
9165 /* This function undoes the changes made by add_symbol_adjust. */
9166
9167 static bfd_boolean
9168 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9169 {
9170 struct ppc_link_hash_entry *eh;
9171
9172 if (h->root.type == bfd_link_hash_indirect)
9173 return TRUE;
9174
9175 if (h->root.type == bfd_link_hash_warning)
9176 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9177
9178 eh = (struct ppc_link_hash_entry *) h;
9179 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9180 return TRUE;
9181
9182 eh->elf.root.type = bfd_link_hash_undefined;
9183 return TRUE;
9184 }
9185
9186 void
9187 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9188 {
9189 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9190 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9191 }
9192
9193 /* The RELOCATE_SECTION function is called by the ELF backend linker
9194 to handle the relocations for a section.
9195
9196 The relocs are always passed as Rela structures; if the section
9197 actually uses Rel structures, the r_addend field will always be
9198 zero.
9199
9200 This function is responsible for adjust the section contents as
9201 necessary, and (if using Rela relocs and generating a
9202 relocatable output file) adjusting the reloc addend as
9203 necessary.
9204
9205 This function does not have to worry about setting the reloc
9206 address or the reloc symbol index.
9207
9208 LOCAL_SYMS is a pointer to the swapped in local symbols.
9209
9210 LOCAL_SECTIONS is an array giving the section in the input file
9211 corresponding to the st_shndx field of each local symbol.
9212
9213 The global hash table entry for the global symbols can be found
9214 via elf_sym_hashes (input_bfd).
9215
9216 When generating relocatable output, this function must handle
9217 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9218 going to be the section symbol corresponding to the output
9219 section, which means that the addend must be adjusted
9220 accordingly. */
9221
9222 static bfd_boolean
9223 ppc64_elf_relocate_section (bfd *output_bfd,
9224 struct bfd_link_info *info,
9225 bfd *input_bfd,
9226 asection *input_section,
9227 bfd_byte *contents,
9228 Elf_Internal_Rela *relocs,
9229 Elf_Internal_Sym *local_syms,
9230 asection **local_sections)
9231 {
9232 struct ppc_link_hash_table *htab;
9233 Elf_Internal_Shdr *symtab_hdr;
9234 struct elf_link_hash_entry **sym_hashes;
9235 Elf_Internal_Rela *rel;
9236 Elf_Internal_Rela *relend;
9237 Elf_Internal_Rela outrel;
9238 bfd_byte *loc;
9239 struct got_entry **local_got_ents;
9240 bfd_vma TOCstart;
9241 bfd_boolean ret = TRUE;
9242 bfd_boolean is_opd;
9243 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9244 bfd_boolean is_power4 = FALSE;
9245
9246 if (info->relocatable)
9247 return TRUE;
9248
9249 /* Initialize howto table if needed. */
9250 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9251 ppc_howto_init ();
9252
9253 htab = ppc_hash_table (info);
9254
9255 /* Don't relocate stub sections. */
9256 if (input_section->owner == htab->stub_bfd)
9257 return TRUE;
9258
9259 local_got_ents = elf_local_got_ents (input_bfd);
9260 TOCstart = elf_gp (output_bfd);
9261 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9262 sym_hashes = elf_sym_hashes (input_bfd);
9263 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9264
9265 rel = relocs;
9266 relend = relocs + input_section->reloc_count;
9267 for (; rel < relend; rel++)
9268 {
9269 enum elf_ppc64_reloc_type r_type;
9270 bfd_vma addend;
9271 bfd_reloc_status_type r;
9272 Elf_Internal_Sym *sym;
9273 asection *sec;
9274 struct elf_link_hash_entry *h_elf;
9275 struct ppc_link_hash_entry *h;
9276 struct ppc_link_hash_entry *fdh;
9277 const char *sym_name;
9278 unsigned long r_symndx, toc_symndx;
9279 char tls_mask, tls_gd, tls_type;
9280 char sym_type;
9281 bfd_vma relocation;
9282 bfd_boolean unresolved_reloc;
9283 bfd_boolean warned;
9284 unsigned long insn, mask;
9285 struct ppc_stub_hash_entry *stub_entry;
9286 bfd_vma max_br_offset;
9287 bfd_vma from;
9288
9289 r_type = ELF64_R_TYPE (rel->r_info);
9290 r_symndx = ELF64_R_SYM (rel->r_info);
9291
9292 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9293 symbol of the previous ADDR64 reloc. The symbol gives us the
9294 proper TOC base to use. */
9295 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9296 && rel != relocs
9297 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9298 && is_opd)
9299 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9300
9301 sym = NULL;
9302 sec = NULL;
9303 h_elf = NULL;
9304 sym_name = NULL;
9305 unresolved_reloc = FALSE;
9306 warned = FALSE;
9307
9308 if (r_symndx < symtab_hdr->sh_info)
9309 {
9310 /* It's a local symbol. */
9311 long *opd_adjust;
9312
9313 sym = local_syms + r_symndx;
9314 sec = local_sections[r_symndx];
9315 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
9316 sym_type = ELF64_ST_TYPE (sym->st_info);
9317 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9318 opd_adjust = get_opd_info (sec);
9319 if (opd_adjust != NULL)
9320 {
9321 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9322 if (adjust == -1)
9323 relocation = 0;
9324 else
9325 relocation += adjust;
9326 }
9327 }
9328 else
9329 {
9330 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9331 r_symndx, symtab_hdr, sym_hashes,
9332 h_elf, sec, relocation,
9333 unresolved_reloc, warned);
9334 sym_name = h_elf->root.root.string;
9335 sym_type = h_elf->type;
9336 }
9337 h = (struct ppc_link_hash_entry *) h_elf;
9338
9339 /* TLS optimizations. Replace instruction sequences and relocs
9340 based on information we collected in tls_optimize. We edit
9341 RELOCS so that --emit-relocs will output something sensible
9342 for the final instruction stream. */
9343 tls_mask = 0;
9344 tls_gd = 0;
9345 toc_symndx = 0;
9346 if (IS_PPC64_TLS_RELOC (r_type))
9347 {
9348 if (h != NULL)
9349 tls_mask = h->tls_mask;
9350 else if (local_got_ents != NULL)
9351 {
9352 char *lgot_masks;
9353 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9354 tls_mask = lgot_masks[r_symndx];
9355 }
9356 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9357 {
9358 /* Check for toc tls entries. */
9359 char *toc_tls;
9360
9361 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9362 rel, input_bfd))
9363 return FALSE;
9364
9365 if (toc_tls)
9366 tls_mask = *toc_tls;
9367 }
9368 }
9369
9370 /* Check that tls relocs are used with tls syms, and non-tls
9371 relocs are used with non-tls syms. */
9372 if (r_symndx != 0
9373 && r_type != R_PPC64_NONE
9374 && (h == NULL
9375 || h->elf.root.type == bfd_link_hash_defined
9376 || h->elf.root.type == bfd_link_hash_defweak)
9377 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9378 {
9379 if (r_type == R_PPC64_TLS && tls_mask != 0)
9380 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9381 ;
9382 else
9383 (*_bfd_error_handler)
9384 (sym_type == STT_TLS
9385 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9386 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9387 input_bfd,
9388 input_section,
9389 (long) rel->r_offset,
9390 ppc64_elf_howto_table[r_type]->name,
9391 sym_name);
9392 }
9393
9394 /* Ensure reloc mapping code below stays sane. */
9395 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9396 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9397 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9398 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9399 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9400 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9401 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9402 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9403 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9404 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9405 abort ();
9406
9407 switch (r_type)
9408 {
9409 default:
9410 break;
9411
9412 case R_PPC64_TOC16:
9413 case R_PPC64_TOC16_LO:
9414 case R_PPC64_TOC16_DS:
9415 case R_PPC64_TOC16_LO_DS:
9416 {
9417 /* Check for toc tls entries. */
9418 char *toc_tls;
9419 int retval;
9420
9421 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9422 rel, input_bfd);
9423 if (retval == 0)
9424 return FALSE;
9425
9426 if (toc_tls)
9427 {
9428 tls_mask = *toc_tls;
9429 if (r_type == R_PPC64_TOC16_DS
9430 || r_type == R_PPC64_TOC16_LO_DS)
9431 {
9432 if (tls_mask != 0
9433 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9434 goto toctprel;
9435 }
9436 else
9437 {
9438 /* If we found a GD reloc pair, then we might be
9439 doing a GD->IE transition. */
9440 if (retval == 2)
9441 {
9442 tls_gd = TLS_TPRELGD;
9443 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9444 goto tls_get_addr_check;
9445 }
9446 else if (retval == 3)
9447 {
9448 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9449 goto tls_get_addr_check;
9450 }
9451 }
9452 }
9453 }
9454 break;
9455
9456 case R_PPC64_GOT_TPREL16_DS:
9457 case R_PPC64_GOT_TPREL16_LO_DS:
9458 if (tls_mask != 0
9459 && (tls_mask & TLS_TPREL) == 0)
9460 {
9461 toctprel:
9462 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9463 insn &= 31 << 21;
9464 insn |= 0x3c0d0000; /* addis 0,13,0 */
9465 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9466 r_type = R_PPC64_TPREL16_HA;
9467 if (toc_symndx != 0)
9468 {
9469 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9470 /* We changed the symbol. Start over in order to
9471 get h, sym, sec etc. right. */
9472 rel--;
9473 continue;
9474 }
9475 else
9476 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9477 }
9478 break;
9479
9480 case R_PPC64_TLS:
9481 if (tls_mask != 0
9482 && (tls_mask & TLS_TPREL) == 0)
9483 {
9484 bfd_vma rtra;
9485 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9486 if ((insn & ((0x3f << 26) | (31 << 11)))
9487 == ((31 << 26) | (13 << 11)))
9488 rtra = insn & ((1 << 26) - (1 << 16));
9489 else if ((insn & ((0x3f << 26) | (31 << 16)))
9490 == ((31 << 26) | (13 << 16)))
9491 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9492 else
9493 abort ();
9494 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9495 /* add -> addi. */
9496 insn = 14 << 26;
9497 else if ((insn & (31 << 1)) == 23 << 1
9498 && ((insn & (31 << 6)) < 14 << 6
9499 || ((insn & (31 << 6)) >= 16 << 6
9500 && (insn & (31 << 6)) < 24 << 6)))
9501 /* load and store indexed -> dform. */
9502 insn = (32 | ((insn >> 6) & 31)) << 26;
9503 else if ((insn & (31 << 1)) == 21 << 1
9504 && (insn & (0x1a << 6)) == 0)
9505 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9506 insn = (((58 | ((insn >> 6) & 4)) << 26)
9507 | ((insn >> 6) & 1));
9508 else if ((insn & (31 << 1)) == 21 << 1
9509 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9510 /* lwax -> lwa. */
9511 insn = (58 << 26) | 2;
9512 else
9513 abort ();
9514 insn |= rtra;
9515 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9516 /* Was PPC64_TLS which sits on insn boundary, now
9517 PPC64_TPREL16_LO which is at insn+2. */
9518 rel->r_offset += 2;
9519 r_type = R_PPC64_TPREL16_LO;
9520 if (toc_symndx != 0)
9521 {
9522 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9523 /* We changed the symbol. Start over in order to
9524 get h, sym, sec etc. right. */
9525 rel--;
9526 continue;
9527 }
9528 else
9529 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9530 }
9531 break;
9532
9533 case R_PPC64_GOT_TLSGD16_HI:
9534 case R_PPC64_GOT_TLSGD16_HA:
9535 tls_gd = TLS_TPRELGD;
9536 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9537 goto tls_gdld_hi;
9538 break;
9539
9540 case R_PPC64_GOT_TLSLD16_HI:
9541 case R_PPC64_GOT_TLSLD16_HA:
9542 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9543 {
9544 tls_gdld_hi:
9545 if ((tls_mask & tls_gd) != 0)
9546 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9547 + R_PPC64_GOT_TPREL16_DS);
9548 else
9549 {
9550 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9551 rel->r_offset -= 2;
9552 r_type = R_PPC64_NONE;
9553 }
9554 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9555 }
9556 break;
9557
9558 case R_PPC64_GOT_TLSGD16:
9559 case R_PPC64_GOT_TLSGD16_LO:
9560 tls_gd = TLS_TPRELGD;
9561 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9562 goto tls_get_addr_check;
9563 break;
9564
9565 case R_PPC64_GOT_TLSLD16:
9566 case R_PPC64_GOT_TLSLD16_LO:
9567 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9568 {
9569 tls_get_addr_check:
9570 if (rel + 1 < relend)
9571 {
9572 enum elf_ppc64_reloc_type r_type2;
9573 unsigned long r_symndx2;
9574 struct elf_link_hash_entry *h2;
9575 bfd_vma insn1, insn2, insn3;
9576 bfd_vma offset;
9577
9578 /* The next instruction should be a call to
9579 __tls_get_addr. Peek at the reloc to be sure. */
9580 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9581 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9582 if (r_symndx2 < symtab_hdr->sh_info
9583 || (r_type2 != R_PPC64_REL14
9584 && r_type2 != R_PPC64_REL14_BRTAKEN
9585 && r_type2 != R_PPC64_REL14_BRNTAKEN
9586 && r_type2 != R_PPC64_REL24))
9587 break;
9588
9589 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9590 while (h2->root.type == bfd_link_hash_indirect
9591 || h2->root.type == bfd_link_hash_warning)
9592 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9593 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9594 && h2 != &htab->tls_get_addr_fd->elf))
9595 break;
9596
9597 /* OK, it checks out. Replace the call. */
9598 offset = rel[1].r_offset;
9599 insn1 = bfd_get_32 (output_bfd,
9600 contents + rel->r_offset - 2);
9601 insn3 = bfd_get_32 (output_bfd,
9602 contents + offset + 4);
9603 if ((tls_mask & tls_gd) != 0)
9604 {
9605 /* IE */
9606 insn1 &= (1 << 26) - (1 << 2);
9607 insn1 |= 58 << 26; /* ld */
9608 insn2 = 0x7c636a14; /* add 3,3,13 */
9609 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9610 if ((tls_mask & TLS_EXPLICIT) == 0)
9611 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9612 + R_PPC64_GOT_TPREL16_DS);
9613 else
9614 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9615 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9616 }
9617 else
9618 {
9619 /* LE */
9620 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9621 insn2 = 0x38630000; /* addi 3,3,0 */
9622 if (tls_gd == 0)
9623 {
9624 /* Was an LD reloc. */
9625 r_symndx = 0;
9626 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9627 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9628 }
9629 else if (toc_symndx != 0)
9630 r_symndx = toc_symndx;
9631 r_type = R_PPC64_TPREL16_HA;
9632 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9633 rel[1].r_info = ELF64_R_INFO (r_symndx,
9634 R_PPC64_TPREL16_LO);
9635 rel[1].r_offset += 2;
9636 }
9637 if (insn3 == NOP
9638 || insn3 == CROR_151515 || insn3 == CROR_313131)
9639 {
9640 insn3 = insn2;
9641 insn2 = NOP;
9642 rel[1].r_offset += 4;
9643 }
9644 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9645 bfd_put_32 (output_bfd, insn2, contents + offset);
9646 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9647 if (tls_gd == 0 || toc_symndx != 0)
9648 {
9649 /* We changed the symbol. Start over in order
9650 to get h, sym, sec etc. right. */
9651 rel--;
9652 continue;
9653 }
9654 }
9655 }
9656 break;
9657
9658 case R_PPC64_DTPMOD64:
9659 if (rel + 1 < relend
9660 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9661 && rel[1].r_offset == rel->r_offset + 8)
9662 {
9663 if ((tls_mask & TLS_GD) == 0)
9664 {
9665 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9666 if ((tls_mask & TLS_TPRELGD) != 0)
9667 r_type = R_PPC64_TPREL64;
9668 else
9669 {
9670 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9671 r_type = R_PPC64_NONE;
9672 }
9673 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9674 }
9675 }
9676 else
9677 {
9678 if ((tls_mask & TLS_LD) == 0)
9679 {
9680 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9681 r_type = R_PPC64_NONE;
9682 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9683 }
9684 }
9685 break;
9686
9687 case R_PPC64_TPREL64:
9688 if ((tls_mask & TLS_TPREL) == 0)
9689 {
9690 r_type = R_PPC64_NONE;
9691 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9692 }
9693 break;
9694 }
9695
9696 /* Handle other relocations that tweak non-addend part of insn. */
9697 insn = 0;
9698 max_br_offset = 1 << 25;
9699 addend = rel->r_addend;
9700 switch (r_type)
9701 {
9702 default:
9703 break;
9704
9705 /* Branch taken prediction relocations. */
9706 case R_PPC64_ADDR14_BRTAKEN:
9707 case R_PPC64_REL14_BRTAKEN:
9708 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9709 /* Fall thru. */
9710
9711 /* Branch not taken prediction relocations. */
9712 case R_PPC64_ADDR14_BRNTAKEN:
9713 case R_PPC64_REL14_BRNTAKEN:
9714 insn |= bfd_get_32 (output_bfd,
9715 contents + rel->r_offset) & ~(0x01 << 21);
9716 /* Fall thru. */
9717
9718 case R_PPC64_REL14:
9719 max_br_offset = 1 << 15;
9720 /* Fall thru. */
9721
9722 case R_PPC64_REL24:
9723 /* Calls to functions with a different TOC, such as calls to
9724 shared objects, need to alter the TOC pointer. This is
9725 done using a linkage stub. A REL24 branching to these
9726 linkage stubs needs to be followed by a nop, as the nop
9727 will be replaced with an instruction to restore the TOC
9728 base pointer. */
9729 stub_entry = NULL;
9730 fdh = h;
9731 if (((h != NULL
9732 && (((fdh = h->oh) != NULL
9733 && fdh->elf.plt.plist != NULL)
9734 || (fdh = h)->elf.plt.plist != NULL))
9735 || (sec != NULL
9736 && sec->output_section != NULL
9737 && sec->id <= htab->top_id
9738 && (htab->stub_group[sec->id].toc_off
9739 != htab->stub_group[input_section->id].toc_off)))
9740 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9741 rel, htab)) != NULL
9742 && (stub_entry->stub_type == ppc_stub_plt_call
9743 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9744 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9745 {
9746 bfd_boolean can_plt_call = FALSE;
9747
9748 if (rel->r_offset + 8 <= input_section->size)
9749 {
9750 unsigned long nop;
9751 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9752 if (nop == NOP
9753 || nop == CROR_151515 || nop == CROR_313131)
9754 {
9755 bfd_put_32 (input_bfd, LD_R2_40R1,
9756 contents + rel->r_offset + 4);
9757 can_plt_call = TRUE;
9758 }
9759 }
9760
9761 if (!can_plt_call)
9762 {
9763 if (stub_entry->stub_type == ppc_stub_plt_call)
9764 {
9765 /* If this is a plain branch rather than a branch
9766 and link, don't require a nop. */
9767 unsigned long br;
9768 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9769 if ((br & 1) == 0)
9770 can_plt_call = TRUE;
9771 }
9772 else if (h != NULL
9773 && strcmp (h->elf.root.root.string,
9774 ".__libc_start_main") == 0)
9775 {
9776 /* Allow crt1 branch to go via a toc adjusting stub. */
9777 can_plt_call = TRUE;
9778 }
9779 else
9780 {
9781 if (strcmp (input_section->output_section->name,
9782 ".init") == 0
9783 || strcmp (input_section->output_section->name,
9784 ".fini") == 0)
9785 (*_bfd_error_handler)
9786 (_("%B(%A+0x%lx): automatic multiple TOCs "
9787 "not supported using your crt files; "
9788 "recompile with -mminimal-toc or upgrade gcc"),
9789 input_bfd,
9790 input_section,
9791 (long) rel->r_offset);
9792 else
9793 (*_bfd_error_handler)
9794 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9795 "does not allow automatic multiple TOCs; "
9796 "recompile with -mminimal-toc or "
9797 "-fno-optimize-sibling-calls, "
9798 "or make `%s' extern"),
9799 input_bfd,
9800 input_section,
9801 (long) rel->r_offset,
9802 sym_name,
9803 sym_name);
9804 bfd_set_error (bfd_error_bad_value);
9805 ret = FALSE;
9806 }
9807 }
9808
9809 if (can_plt_call
9810 && stub_entry->stub_type == ppc_stub_plt_call)
9811 unresolved_reloc = FALSE;
9812 }
9813
9814 if (stub_entry == NULL
9815 && get_opd_info (sec) != NULL)
9816 {
9817 /* The branch destination is the value of the opd entry. */
9818 bfd_vma off = (relocation - sec->output_section->vma
9819 - sec->output_offset + rel->r_addend);
9820 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9821 if (dest != (bfd_vma) -1)
9822 {
9823 relocation = dest;
9824 addend = 0;
9825 }
9826 }
9827
9828 /* If the branch is out of reach we ought to have a long
9829 branch stub. */
9830 from = (rel->r_offset
9831 + input_section->output_offset
9832 + input_section->output_section->vma);
9833
9834 if (stub_entry == NULL
9835 && (relocation + rel->r_addend - from + max_br_offset
9836 >= 2 * max_br_offset)
9837 && r_type != R_PPC64_ADDR14_BRTAKEN
9838 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9839 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9840 htab);
9841
9842 if (stub_entry != NULL)
9843 {
9844 /* Munge up the value and addend so that we call the stub
9845 rather than the procedure directly. */
9846 relocation = (stub_entry->stub_offset
9847 + stub_entry->stub_sec->output_offset
9848 + stub_entry->stub_sec->output_section->vma);
9849 addend = 0;
9850 }
9851
9852 if (insn != 0)
9853 {
9854 if (is_power4)
9855 {
9856 /* Set 'a' bit. This is 0b00010 in BO field for branch
9857 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9858 for branch on CTR insns (BO == 1a00t or 1a01t). */
9859 if ((insn & (0x14 << 21)) == (0x04 << 21))
9860 insn |= 0x02 << 21;
9861 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9862 insn |= 0x08 << 21;
9863 else
9864 break;
9865 }
9866 else
9867 {
9868 /* Invert 'y' bit if not the default. */
9869 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9870 insn ^= 0x01 << 21;
9871 }
9872
9873 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9874 }
9875
9876 /* NOP out calls to undefined weak functions.
9877 We can thus call a weak function without first
9878 checking whether the function is defined. */
9879 else if (h != NULL
9880 && h->elf.root.type == bfd_link_hash_undefweak
9881 && r_type == R_PPC64_REL24
9882 && relocation == 0
9883 && rel->r_addend == 0)
9884 {
9885 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9886 continue;
9887 }
9888 break;
9889 }
9890
9891 /* Set `addend'. */
9892 tls_type = 0;
9893 switch (r_type)
9894 {
9895 default:
9896 (*_bfd_error_handler)
9897 (_("%B: unknown relocation type %d for symbol %s"),
9898 input_bfd, (int) r_type, sym_name);
9899
9900 bfd_set_error (bfd_error_bad_value);
9901 ret = FALSE;
9902 continue;
9903
9904 case R_PPC64_NONE:
9905 case R_PPC64_TLS:
9906 case R_PPC64_GNU_VTINHERIT:
9907 case R_PPC64_GNU_VTENTRY:
9908 continue;
9909
9910 /* GOT16 relocations. Like an ADDR16 using the symbol's
9911 address in the GOT as relocation value instead of the
9912 symbol's value itself. Also, create a GOT entry for the
9913 symbol and put the symbol value there. */
9914 case R_PPC64_GOT_TLSGD16:
9915 case R_PPC64_GOT_TLSGD16_LO:
9916 case R_PPC64_GOT_TLSGD16_HI:
9917 case R_PPC64_GOT_TLSGD16_HA:
9918 tls_type = TLS_TLS | TLS_GD;
9919 goto dogot;
9920
9921 case R_PPC64_GOT_TLSLD16:
9922 case R_PPC64_GOT_TLSLD16_LO:
9923 case R_PPC64_GOT_TLSLD16_HI:
9924 case R_PPC64_GOT_TLSLD16_HA:
9925 tls_type = TLS_TLS | TLS_LD;
9926 goto dogot;
9927
9928 case R_PPC64_GOT_TPREL16_DS:
9929 case R_PPC64_GOT_TPREL16_LO_DS:
9930 case R_PPC64_GOT_TPREL16_HI:
9931 case R_PPC64_GOT_TPREL16_HA:
9932 tls_type = TLS_TLS | TLS_TPREL;
9933 goto dogot;
9934
9935 case R_PPC64_GOT_DTPREL16_DS:
9936 case R_PPC64_GOT_DTPREL16_LO_DS:
9937 case R_PPC64_GOT_DTPREL16_HI:
9938 case R_PPC64_GOT_DTPREL16_HA:
9939 tls_type = TLS_TLS | TLS_DTPREL;
9940 goto dogot;
9941
9942 case R_PPC64_GOT16:
9943 case R_PPC64_GOT16_LO:
9944 case R_PPC64_GOT16_HI:
9945 case R_PPC64_GOT16_HA:
9946 case R_PPC64_GOT16_DS:
9947 case R_PPC64_GOT16_LO_DS:
9948 dogot:
9949 {
9950 /* Relocation is to the entry for this symbol in the global
9951 offset table. */
9952 asection *got;
9953 bfd_vma *offp;
9954 bfd_vma off;
9955 unsigned long indx = 0;
9956
9957 if (tls_type == (TLS_TLS | TLS_LD)
9958 && (h == NULL
9959 || !h->elf.def_dynamic))
9960 offp = &ppc64_tlsld_got (input_bfd)->offset;
9961 else
9962 {
9963 struct got_entry *ent;
9964
9965 if (h != NULL)
9966 {
9967 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9968 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
9969 &h->elf)
9970 || (info->shared
9971 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
9972 /* This is actually a static link, or it is a
9973 -Bsymbolic link and the symbol is defined
9974 locally, or the symbol was forced to be local
9975 because of a version file. */
9976 ;
9977 else
9978 {
9979 indx = h->elf.dynindx;
9980 unresolved_reloc = FALSE;
9981 }
9982 ent = h->elf.got.glist;
9983 }
9984 else
9985 {
9986 if (local_got_ents == NULL)
9987 abort ();
9988 ent = local_got_ents[r_symndx];
9989 }
9990
9991 for (; ent != NULL; ent = ent->next)
9992 if (ent->addend == rel->r_addend
9993 && ent->owner == input_bfd
9994 && ent->tls_type == tls_type)
9995 break;
9996 if (ent == NULL)
9997 abort ();
9998 offp = &ent->got.offset;
9999 }
10000
10001 got = ppc64_elf_tdata (input_bfd)->got;
10002 if (got == NULL)
10003 abort ();
10004
10005 /* The offset must always be a multiple of 8. We use the
10006 least significant bit to record whether we have already
10007 processed this entry. */
10008 off = *offp;
10009 if ((off & 1) != 0)
10010 off &= ~1;
10011 else
10012 {
10013 /* Generate relocs for the dynamic linker, except in
10014 the case of TLSLD where we'll use one entry per
10015 module. */
10016 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10017
10018 *offp = off | 1;
10019 if ((info->shared || indx != 0)
10020 && (h == NULL
10021 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10022 || h->elf.root.type != bfd_link_hash_undefweak))
10023 {
10024 outrel.r_offset = (got->output_section->vma
10025 + got->output_offset
10026 + off);
10027 outrel.r_addend = rel->r_addend;
10028 if (tls_type & (TLS_LD | TLS_GD))
10029 {
10030 outrel.r_addend = 0;
10031 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10032 if (tls_type == (TLS_TLS | TLS_GD))
10033 {
10034 loc = relgot->contents;
10035 loc += (relgot->reloc_count++
10036 * sizeof (Elf64_External_Rela));
10037 bfd_elf64_swap_reloca_out (output_bfd,
10038 &outrel, loc);
10039 outrel.r_offset += 8;
10040 outrel.r_addend = rel->r_addend;
10041 outrel.r_info
10042 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10043 }
10044 }
10045 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10046 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10047 else if (tls_type == (TLS_TLS | TLS_TPREL))
10048 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10049 else if (indx == 0)
10050 {
10051 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10052
10053 /* Write the .got section contents for the sake
10054 of prelink. */
10055 loc = got->contents + off;
10056 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10057 loc);
10058 }
10059 else
10060 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10061
10062 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10063 {
10064 outrel.r_addend += relocation;
10065 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10066 outrel.r_addend -= htab->elf.tls_sec->vma;
10067 }
10068 loc = relgot->contents;
10069 loc += (relgot->reloc_count++
10070 * sizeof (Elf64_External_Rela));
10071 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10072 }
10073
10074 /* Init the .got section contents here if we're not
10075 emitting a reloc. */
10076 else
10077 {
10078 relocation += rel->r_addend;
10079 if (tls_type == (TLS_TLS | TLS_LD))
10080 relocation = 1;
10081 else if (tls_type != 0)
10082 {
10083 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10084 if (tls_type == (TLS_TLS | TLS_TPREL))
10085 relocation += DTP_OFFSET - TP_OFFSET;
10086
10087 if (tls_type == (TLS_TLS | TLS_GD))
10088 {
10089 bfd_put_64 (output_bfd, relocation,
10090 got->contents + off + 8);
10091 relocation = 1;
10092 }
10093 }
10094
10095 bfd_put_64 (output_bfd, relocation,
10096 got->contents + off);
10097 }
10098 }
10099
10100 if (off >= (bfd_vma) -2)
10101 abort ();
10102
10103 relocation = got->output_offset + off;
10104
10105 /* TOC base (r2) is TOC start plus 0x8000. */
10106 addend = -TOC_BASE_OFF;
10107 }
10108 break;
10109
10110 case R_PPC64_PLT16_HA:
10111 case R_PPC64_PLT16_HI:
10112 case R_PPC64_PLT16_LO:
10113 case R_PPC64_PLT32:
10114 case R_PPC64_PLT64:
10115 /* Relocation is to the entry for this symbol in the
10116 procedure linkage table. */
10117
10118 /* Resolve a PLT reloc against a local symbol directly,
10119 without using the procedure linkage table. */
10120 if (h == NULL)
10121 break;
10122
10123 /* It's possible that we didn't make a PLT entry for this
10124 symbol. This happens when statically linking PIC code,
10125 or when using -Bsymbolic. Go find a match if there is a
10126 PLT entry. */
10127 if (htab->plt != NULL)
10128 {
10129 struct plt_entry *ent;
10130 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10131 if (ent->addend == rel->r_addend
10132 && ent->plt.offset != (bfd_vma) -1)
10133 {
10134 relocation = (htab->plt->output_section->vma
10135 + htab->plt->output_offset
10136 + ent->plt.offset);
10137 unresolved_reloc = FALSE;
10138 }
10139 }
10140 break;
10141
10142 case R_PPC64_TOC:
10143 /* Relocation value is TOC base. */
10144 relocation = TOCstart;
10145 if (r_symndx == 0)
10146 relocation += htab->stub_group[input_section->id].toc_off;
10147 else if (unresolved_reloc)
10148 ;
10149 else if (sec != NULL && sec->id <= htab->top_id)
10150 relocation += htab->stub_group[sec->id].toc_off;
10151 else
10152 unresolved_reloc = TRUE;
10153 goto dodyn2;
10154
10155 /* TOC16 relocs. We want the offset relative to the TOC base,
10156 which is the address of the start of the TOC plus 0x8000.
10157 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10158 in this order. */
10159 case R_PPC64_TOC16:
10160 case R_PPC64_TOC16_LO:
10161 case R_PPC64_TOC16_HI:
10162 case R_PPC64_TOC16_DS:
10163 case R_PPC64_TOC16_LO_DS:
10164 case R_PPC64_TOC16_HA:
10165 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10166 break;
10167
10168 /* Relocate against the beginning of the section. */
10169 case R_PPC64_SECTOFF:
10170 case R_PPC64_SECTOFF_LO:
10171 case R_PPC64_SECTOFF_HI:
10172 case R_PPC64_SECTOFF_DS:
10173 case R_PPC64_SECTOFF_LO_DS:
10174 case R_PPC64_SECTOFF_HA:
10175 if (sec != NULL)
10176 addend -= sec->output_section->vma;
10177 break;
10178
10179 case R_PPC64_REL14:
10180 case R_PPC64_REL14_BRNTAKEN:
10181 case R_PPC64_REL14_BRTAKEN:
10182 case R_PPC64_REL24:
10183 break;
10184
10185 case R_PPC64_TPREL16:
10186 case R_PPC64_TPREL16_LO:
10187 case R_PPC64_TPREL16_HI:
10188 case R_PPC64_TPREL16_HA:
10189 case R_PPC64_TPREL16_DS:
10190 case R_PPC64_TPREL16_LO_DS:
10191 case R_PPC64_TPREL16_HIGHER:
10192 case R_PPC64_TPREL16_HIGHERA:
10193 case R_PPC64_TPREL16_HIGHEST:
10194 case R_PPC64_TPREL16_HIGHESTA:
10195 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10196 if (info->shared)
10197 /* The TPREL16 relocs shouldn't really be used in shared
10198 libs as they will result in DT_TEXTREL being set, but
10199 support them anyway. */
10200 goto dodyn;
10201 break;
10202
10203 case R_PPC64_DTPREL16:
10204 case R_PPC64_DTPREL16_LO:
10205 case R_PPC64_DTPREL16_HI:
10206 case R_PPC64_DTPREL16_HA:
10207 case R_PPC64_DTPREL16_DS:
10208 case R_PPC64_DTPREL16_LO_DS:
10209 case R_PPC64_DTPREL16_HIGHER:
10210 case R_PPC64_DTPREL16_HIGHERA:
10211 case R_PPC64_DTPREL16_HIGHEST:
10212 case R_PPC64_DTPREL16_HIGHESTA:
10213 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10214 break;
10215
10216 case R_PPC64_DTPMOD64:
10217 relocation = 1;
10218 addend = 0;
10219 goto dodyn;
10220
10221 case R_PPC64_TPREL64:
10222 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10223 goto dodyn;
10224
10225 case R_PPC64_DTPREL64:
10226 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10227 /* Fall thru */
10228
10229 /* Relocations that may need to be propagated if this is a
10230 dynamic object. */
10231 case R_PPC64_REL30:
10232 case R_PPC64_REL32:
10233 case R_PPC64_REL64:
10234 case R_PPC64_ADDR14:
10235 case R_PPC64_ADDR14_BRNTAKEN:
10236 case R_PPC64_ADDR14_BRTAKEN:
10237 case R_PPC64_ADDR16:
10238 case R_PPC64_ADDR16_DS:
10239 case R_PPC64_ADDR16_HA:
10240 case R_PPC64_ADDR16_HI:
10241 case R_PPC64_ADDR16_HIGHER:
10242 case R_PPC64_ADDR16_HIGHERA:
10243 case R_PPC64_ADDR16_HIGHEST:
10244 case R_PPC64_ADDR16_HIGHESTA:
10245 case R_PPC64_ADDR16_LO:
10246 case R_PPC64_ADDR16_LO_DS:
10247 case R_PPC64_ADDR24:
10248 case R_PPC64_ADDR32:
10249 case R_PPC64_ADDR64:
10250 case R_PPC64_UADDR16:
10251 case R_PPC64_UADDR32:
10252 case R_PPC64_UADDR64:
10253 /* r_symndx will be zero only for relocs against symbols
10254 from removed linkonce sections, or sections discarded by
10255 a linker script. */
10256 dodyn:
10257 if (r_symndx == 0)
10258 break;
10259 /* Fall thru. */
10260
10261 dodyn2:
10262 if ((input_section->flags & SEC_ALLOC) == 0)
10263 break;
10264
10265 if (NO_OPD_RELOCS && is_opd)
10266 break;
10267
10268 if ((info->shared
10269 && (h == NULL
10270 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10271 || h->elf.root.type != bfd_link_hash_undefweak)
10272 && (MUST_BE_DYN_RELOC (r_type)
10273 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10274 || (ELIMINATE_COPY_RELOCS
10275 && !info->shared
10276 && h != NULL
10277 && h->elf.dynindx != -1
10278 && !h->elf.non_got_ref
10279 && h->elf.def_dynamic
10280 && !h->elf.def_regular))
10281 {
10282 Elf_Internal_Rela outrel;
10283 bfd_boolean skip, relocate;
10284 asection *sreloc;
10285 bfd_byte *loc;
10286 bfd_vma out_off;
10287
10288 /* When generating a dynamic object, these relocations
10289 are copied into the output file to be resolved at run
10290 time. */
10291
10292 skip = FALSE;
10293 relocate = FALSE;
10294
10295 out_off = _bfd_elf_section_offset (output_bfd, info,
10296 input_section, rel->r_offset);
10297 if (out_off == (bfd_vma) -1)
10298 skip = TRUE;
10299 else if (out_off == (bfd_vma) -2)
10300 skip = TRUE, relocate = TRUE;
10301 out_off += (input_section->output_section->vma
10302 + input_section->output_offset);
10303 outrel.r_offset = out_off;
10304 outrel.r_addend = rel->r_addend;
10305
10306 /* Optimize unaligned reloc use. */
10307 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10308 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10309 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10310 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10311 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10312 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10313 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10314 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10315 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10316
10317 if (skip)
10318 memset (&outrel, 0, sizeof outrel);
10319 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10320 && !is_opd
10321 && r_type != R_PPC64_TOC)
10322 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10323 else
10324 {
10325 /* This symbol is local, or marked to become local,
10326 or this is an opd section reloc which must point
10327 at a local function. */
10328 outrel.r_addend += relocation;
10329 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10330 {
10331 if (is_opd && h != NULL)
10332 {
10333 /* Lie about opd entries. This case occurs
10334 when building shared libraries and we
10335 reference a function in another shared
10336 lib. The same thing happens for a weak
10337 definition in an application that's
10338 overridden by a strong definition in a
10339 shared lib. (I believe this is a generic
10340 bug in binutils handling of weak syms.)
10341 In these cases we won't use the opd
10342 entry in this lib. */
10343 unresolved_reloc = FALSE;
10344 }
10345 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10346
10347 /* We need to relocate .opd contents for ld.so.
10348 Prelink also wants simple and consistent rules
10349 for relocs. This make all RELATIVE relocs have
10350 *r_offset equal to r_addend. */
10351 relocate = TRUE;
10352 }
10353 else
10354 {
10355 long indx = 0;
10356
10357 if (bfd_is_abs_section (sec))
10358 ;
10359 else if (sec == NULL || sec->owner == NULL)
10360 {
10361 bfd_set_error (bfd_error_bad_value);
10362 return FALSE;
10363 }
10364 else
10365 {
10366 asection *osec;
10367
10368 osec = sec->output_section;
10369 indx = elf_section_data (osec)->dynindx;
10370
10371 /* We are turning this relocation into one
10372 against a section symbol, so subtract out
10373 the output section's address but not the
10374 offset of the input section in the output
10375 section. */
10376 outrel.r_addend -= osec->vma;
10377 }
10378
10379 outrel.r_info = ELF64_R_INFO (indx, r_type);
10380 }
10381 }
10382
10383 sreloc = elf_section_data (input_section)->sreloc;
10384 if (sreloc == NULL)
10385 abort ();
10386
10387 loc = sreloc->contents;
10388 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10389 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10390
10391 /* If this reloc is against an external symbol, it will
10392 be computed at runtime, so there's no need to do
10393 anything now. However, for the sake of prelink ensure
10394 that the section contents are a known value. */
10395 if (! relocate)
10396 {
10397 unresolved_reloc = FALSE;
10398 /* The value chosen here is quite arbitrary as ld.so
10399 ignores section contents except for the special
10400 case of .opd where the contents might be accessed
10401 before relocation. Choose zero, as that won't
10402 cause reloc overflow. */
10403 relocation = 0;
10404 addend = 0;
10405 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10406 to improve backward compatibility with older
10407 versions of ld. */
10408 if (r_type == R_PPC64_ADDR64)
10409 addend = outrel.r_addend;
10410 /* Adjust pc_relative relocs to have zero in *r_offset. */
10411 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10412 addend = (input_section->output_section->vma
10413 + input_section->output_offset
10414 + rel->r_offset);
10415 }
10416 }
10417 break;
10418
10419 case R_PPC64_COPY:
10420 case R_PPC64_GLOB_DAT:
10421 case R_PPC64_JMP_SLOT:
10422 case R_PPC64_RELATIVE:
10423 /* We shouldn't ever see these dynamic relocs in relocatable
10424 files. */
10425 /* Fall through. */
10426
10427 case R_PPC64_PLTGOT16:
10428 case R_PPC64_PLTGOT16_DS:
10429 case R_PPC64_PLTGOT16_HA:
10430 case R_PPC64_PLTGOT16_HI:
10431 case R_PPC64_PLTGOT16_LO:
10432 case R_PPC64_PLTGOT16_LO_DS:
10433 case R_PPC64_PLTREL32:
10434 case R_PPC64_PLTREL64:
10435 /* These ones haven't been implemented yet. */
10436
10437 (*_bfd_error_handler)
10438 (_("%B: relocation %s is not supported for symbol %s."),
10439 input_bfd,
10440 ppc64_elf_howto_table[r_type]->name, sym_name);
10441
10442 bfd_set_error (bfd_error_invalid_operation);
10443 ret = FALSE;
10444 continue;
10445 }
10446
10447 /* Do any further special processing. */
10448 switch (r_type)
10449 {
10450 default:
10451 break;
10452
10453 case R_PPC64_ADDR16_HA:
10454 case R_PPC64_ADDR16_HIGHERA:
10455 case R_PPC64_ADDR16_HIGHESTA:
10456 case R_PPC64_GOT16_HA:
10457 case R_PPC64_PLTGOT16_HA:
10458 case R_PPC64_PLT16_HA:
10459 case R_PPC64_TOC16_HA:
10460 case R_PPC64_SECTOFF_HA:
10461 case R_PPC64_TPREL16_HA:
10462 case R_PPC64_DTPREL16_HA:
10463 case R_PPC64_GOT_TLSGD16_HA:
10464 case R_PPC64_GOT_TLSLD16_HA:
10465 case R_PPC64_GOT_TPREL16_HA:
10466 case R_PPC64_GOT_DTPREL16_HA:
10467 case R_PPC64_TPREL16_HIGHER:
10468 case R_PPC64_TPREL16_HIGHERA:
10469 case R_PPC64_TPREL16_HIGHEST:
10470 case R_PPC64_TPREL16_HIGHESTA:
10471 case R_PPC64_DTPREL16_HIGHER:
10472 case R_PPC64_DTPREL16_HIGHERA:
10473 case R_PPC64_DTPREL16_HIGHEST:
10474 case R_PPC64_DTPREL16_HIGHESTA:
10475 /* It's just possible that this symbol is a weak symbol
10476 that's not actually defined anywhere. In that case,
10477 'sec' would be NULL, and we should leave the symbol
10478 alone (it will be set to zero elsewhere in the link). */
10479 if (sec != NULL)
10480 /* Add 0x10000 if sign bit in 0:15 is set.
10481 Bits 0:15 are not used. */
10482 addend += 0x8000;
10483 break;
10484
10485 case R_PPC64_ADDR16_DS:
10486 case R_PPC64_ADDR16_LO_DS:
10487 case R_PPC64_GOT16_DS:
10488 case R_PPC64_GOT16_LO_DS:
10489 case R_PPC64_PLT16_LO_DS:
10490 case R_PPC64_SECTOFF_DS:
10491 case R_PPC64_SECTOFF_LO_DS:
10492 case R_PPC64_TOC16_DS:
10493 case R_PPC64_TOC16_LO_DS:
10494 case R_PPC64_PLTGOT16_DS:
10495 case R_PPC64_PLTGOT16_LO_DS:
10496 case R_PPC64_GOT_TPREL16_DS:
10497 case R_PPC64_GOT_TPREL16_LO_DS:
10498 case R_PPC64_GOT_DTPREL16_DS:
10499 case R_PPC64_GOT_DTPREL16_LO_DS:
10500 case R_PPC64_TPREL16_DS:
10501 case R_PPC64_TPREL16_LO_DS:
10502 case R_PPC64_DTPREL16_DS:
10503 case R_PPC64_DTPREL16_LO_DS:
10504 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10505 mask = 3;
10506 /* If this reloc is against an lq insn, then the value must be
10507 a multiple of 16. This is somewhat of a hack, but the
10508 "correct" way to do this by defining _DQ forms of all the
10509 _DS relocs bloats all reloc switches in this file. It
10510 doesn't seem to make much sense to use any of these relocs
10511 in data, so testing the insn should be safe. */
10512 if ((insn & (0x3f << 26)) == (56u << 26))
10513 mask = 15;
10514 if (((relocation + addend) & mask) != 0)
10515 {
10516 (*_bfd_error_handler)
10517 (_("%B: error: relocation %s not a multiple of %d"),
10518 input_bfd,
10519 ppc64_elf_howto_table[r_type]->name,
10520 mask + 1);
10521 bfd_set_error (bfd_error_bad_value);
10522 ret = FALSE;
10523 continue;
10524 }
10525 break;
10526 }
10527
10528 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10529 because such sections are not SEC_ALLOC and thus ld.so will
10530 not process them. */
10531 if (unresolved_reloc
10532 && !((input_section->flags & SEC_DEBUGGING) != 0
10533 && h->elf.def_dynamic))
10534 {
10535 (*_bfd_error_handler)
10536 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10537 input_bfd,
10538 input_section,
10539 (long) rel->r_offset,
10540 ppc64_elf_howto_table[(int) r_type]->name,
10541 h->elf.root.root.string);
10542 ret = FALSE;
10543 }
10544
10545 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10546 input_bfd,
10547 input_section,
10548 contents,
10549 rel->r_offset,
10550 relocation,
10551 addend);
10552
10553 if (r != bfd_reloc_ok)
10554 {
10555 if (sym_name == NULL)
10556 sym_name = "(null)";
10557 if (r == bfd_reloc_overflow)
10558 {
10559 if (warned)
10560 continue;
10561 if (h != NULL
10562 && h->elf.root.type == bfd_link_hash_undefweak
10563 && ppc64_elf_howto_table[r_type]->pc_relative)
10564 {
10565 /* Assume this is a call protected by other code that
10566 detects the symbol is undefined. If this is the case,
10567 we can safely ignore the overflow. If not, the
10568 program is hosed anyway, and a little warning isn't
10569 going to help. */
10570
10571 continue;
10572 }
10573
10574 if (!((*info->callbacks->reloc_overflow)
10575 (info, (h ? &h->elf.root : NULL), sym_name,
10576 ppc64_elf_howto_table[r_type]->name,
10577 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10578 return FALSE;
10579 }
10580 else
10581 {
10582 (*_bfd_error_handler)
10583 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10584 input_bfd,
10585 input_section,
10586 (long) rel->r_offset,
10587 ppc64_elf_howto_table[r_type]->name,
10588 sym_name,
10589 (int) r);
10590 ret = FALSE;
10591 }
10592 }
10593 }
10594
10595 /* If we're emitting relocations, then shortly after this function
10596 returns, reloc offsets and addends for this section will be
10597 adjusted. Worse, reloc symbol indices will be for the output
10598 file rather than the input. Save a copy of the relocs for
10599 opd_entry_value. */
10600 if (is_opd && info->emitrelocations)
10601 {
10602 bfd_size_type amt;
10603 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10604 rel = bfd_alloc (input_bfd, amt);
10605 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10606 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10607 if (rel == NULL)
10608 return FALSE;
10609 memcpy (rel, relocs, amt);
10610 }
10611 return ret;
10612 }
10613
10614 /* Adjust the value of any local symbols in opd sections. */
10615
10616 static bfd_boolean
10617 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10618 const char *name ATTRIBUTE_UNUSED,
10619 Elf_Internal_Sym *elfsym,
10620 asection *input_sec,
10621 struct elf_link_hash_entry *h)
10622 {
10623 long *opd_adjust, adjust;
10624 bfd_vma value;
10625
10626 if (h != NULL)
10627 return TRUE;
10628
10629 opd_adjust = get_opd_info (input_sec);
10630 if (opd_adjust == NULL)
10631 return TRUE;
10632
10633 value = elfsym->st_value - input_sec->output_offset;
10634 if (!info->relocatable)
10635 value -= input_sec->output_section->vma;
10636
10637 adjust = opd_adjust[value / 8];
10638 if (adjust == -1)
10639 elfsym->st_value = 0;
10640 else
10641 elfsym->st_value += adjust;
10642 return TRUE;
10643 }
10644
10645 /* Finish up dynamic symbol handling. We set the contents of various
10646 dynamic sections here. */
10647
10648 static bfd_boolean
10649 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10650 struct bfd_link_info *info,
10651 struct elf_link_hash_entry *h,
10652 Elf_Internal_Sym *sym)
10653 {
10654 struct ppc_link_hash_table *htab;
10655 bfd *dynobj;
10656 struct plt_entry *ent;
10657 Elf_Internal_Rela rela;
10658 bfd_byte *loc;
10659
10660 htab = ppc_hash_table (info);
10661 dynobj = htab->elf.dynobj;
10662
10663 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10664 if (ent->plt.offset != (bfd_vma) -1)
10665 {
10666 /* This symbol has an entry in the procedure linkage
10667 table. Set it up. */
10668
10669 if (htab->plt == NULL
10670 || htab->relplt == NULL
10671 || htab->glink == NULL)
10672 abort ();
10673
10674 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10675 fill in the PLT entry. */
10676 rela.r_offset = (htab->plt->output_section->vma
10677 + htab->plt->output_offset
10678 + ent->plt.offset);
10679 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10680 rela.r_addend = ent->addend;
10681
10682 loc = htab->relplt->contents;
10683 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10684 * sizeof (Elf64_External_Rela));
10685 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10686 }
10687
10688 if (h->needs_copy)
10689 {
10690 Elf_Internal_Rela rela;
10691 bfd_byte *loc;
10692
10693 /* This symbol needs a copy reloc. Set it up. */
10694
10695 if (h->dynindx == -1
10696 || (h->root.type != bfd_link_hash_defined
10697 && h->root.type != bfd_link_hash_defweak)
10698 || htab->relbss == NULL)
10699 abort ();
10700
10701 rela.r_offset = (h->root.u.def.value
10702 + h->root.u.def.section->output_section->vma
10703 + h->root.u.def.section->output_offset);
10704 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10705 rela.r_addend = 0;
10706 loc = htab->relbss->contents;
10707 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10708 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10709 }
10710
10711 /* Mark some specially defined symbols as absolute. */
10712 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10713 sym->st_shndx = SHN_ABS;
10714
10715 return TRUE;
10716 }
10717
10718 /* Used to decide how to sort relocs in an optimal manner for the
10719 dynamic linker, before writing them out. */
10720
10721 static enum elf_reloc_type_class
10722 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10723 {
10724 enum elf_ppc64_reloc_type r_type;
10725
10726 r_type = ELF64_R_TYPE (rela->r_info);
10727 switch (r_type)
10728 {
10729 case R_PPC64_RELATIVE:
10730 return reloc_class_relative;
10731 case R_PPC64_JMP_SLOT:
10732 return reloc_class_plt;
10733 case R_PPC64_COPY:
10734 return reloc_class_copy;
10735 default:
10736 return reloc_class_normal;
10737 }
10738 }
10739
10740 /* Finish up the dynamic sections. */
10741
10742 static bfd_boolean
10743 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10744 struct bfd_link_info *info)
10745 {
10746 struct ppc_link_hash_table *htab;
10747 bfd *dynobj;
10748 asection *sdyn;
10749
10750 htab = ppc_hash_table (info);
10751 dynobj = htab->elf.dynobj;
10752 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10753
10754 if (htab->elf.dynamic_sections_created)
10755 {
10756 Elf64_External_Dyn *dyncon, *dynconend;
10757
10758 if (sdyn == NULL || htab->got == NULL)
10759 abort ();
10760
10761 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10762 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10763 for (; dyncon < dynconend; dyncon++)
10764 {
10765 Elf_Internal_Dyn dyn;
10766 asection *s;
10767
10768 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10769
10770 switch (dyn.d_tag)
10771 {
10772 default:
10773 continue;
10774
10775 case DT_PPC64_GLINK:
10776 s = htab->glink;
10777 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10778 /* We stupidly defined DT_PPC64_GLINK to be the start
10779 of glink rather than the first entry point, which is
10780 what ld.so needs, and now have a bigger stub to
10781 support automatic multiple TOCs. */
10782 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10783 break;
10784
10785 case DT_PPC64_OPD:
10786 s = bfd_get_section_by_name (output_bfd, ".opd");
10787 if (s == NULL)
10788 continue;
10789 dyn.d_un.d_ptr = s->vma;
10790 break;
10791
10792 case DT_PPC64_OPDSZ:
10793 s = bfd_get_section_by_name (output_bfd, ".opd");
10794 if (s == NULL)
10795 continue;
10796 dyn.d_un.d_val = s->size;
10797 break;
10798
10799 case DT_PLTGOT:
10800 s = htab->plt;
10801 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10802 break;
10803
10804 case DT_JMPREL:
10805 s = htab->relplt;
10806 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10807 break;
10808
10809 case DT_PLTRELSZ:
10810 dyn.d_un.d_val = htab->relplt->size;
10811 break;
10812
10813 case DT_RELASZ:
10814 /* Don't count procedure linkage table relocs in the
10815 overall reloc count. */
10816 s = htab->relplt;
10817 if (s == NULL)
10818 continue;
10819 dyn.d_un.d_val -= s->size;
10820 break;
10821
10822 case DT_RELA:
10823 /* We may not be using the standard ELF linker script.
10824 If .rela.plt is the first .rela section, we adjust
10825 DT_RELA to not include it. */
10826 s = htab->relplt;
10827 if (s == NULL)
10828 continue;
10829 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10830 continue;
10831 dyn.d_un.d_ptr += s->size;
10832 break;
10833 }
10834
10835 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10836 }
10837 }
10838
10839 if (htab->got != NULL && htab->got->size != 0)
10840 {
10841 /* Fill in the first entry in the global offset table.
10842 We use it to hold the link-time TOCbase. */
10843 bfd_put_64 (output_bfd,
10844 elf_gp (output_bfd) + TOC_BASE_OFF,
10845 htab->got->contents);
10846
10847 /* Set .got entry size. */
10848 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10849 }
10850
10851 if (htab->plt != NULL && htab->plt->size != 0)
10852 {
10853 /* Set .plt entry size. */
10854 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10855 = PLT_ENTRY_SIZE;
10856 }
10857
10858 /* We need to handle writing out multiple GOT sections ourselves,
10859 since we didn't add them to DYNOBJ. We know dynobj is the first
10860 bfd. */
10861 while ((dynobj = dynobj->link_next) != NULL)
10862 {
10863 asection *s;
10864
10865 if (!is_ppc64_elf_target (dynobj->xvec))
10866 continue;
10867
10868 s = ppc64_elf_tdata (dynobj)->got;
10869 if (s != NULL
10870 && s->size != 0
10871 && s->output_section != bfd_abs_section_ptr
10872 && !bfd_set_section_contents (output_bfd, s->output_section,
10873 s->contents, s->output_offset,
10874 s->size))
10875 return FALSE;
10876 s = ppc64_elf_tdata (dynobj)->relgot;
10877 if (s != NULL
10878 && s->size != 0
10879 && s->output_section != bfd_abs_section_ptr
10880 && !bfd_set_section_contents (output_bfd, s->output_section,
10881 s->contents, s->output_offset,
10882 s->size))
10883 return FALSE;
10884 }
10885
10886 return TRUE;
10887 }
10888
10889 #include "elf64-target.h"
GDB Binutils - Deliverables
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