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* elf64-ppc.c (ppc64_elf_get_synthetic_symtab): Return -1 on errors
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 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 -1;
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 if (relcount == 0)
2762 goto done;
2763
2764 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2765 {
2766 count = -1;
2767 goto done;
2768 }
2769
2770 size = 0;
2771 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2772 {
2773 asymbol *sym;
2774
2775 while (r < opd->relocation + relcount
2776 && r->address < syms[i]->value + opd->vma)
2777 ++r;
2778
2779 if (r == opd->relocation + relcount)
2780 break;
2781
2782 if (r->address != syms[i]->value + opd->vma)
2783 continue;
2784
2785 if (r->howto->type != R_PPC64_ADDR64)
2786 continue;
2787
2788 sym = *r->sym_ptr_ptr;
2789 if (!sym_exists_at (syms, opdsymend, symcount,
2790 sym->section->id, sym->value + r->addend))
2791 {
2792 ++count;
2793 size += sizeof (asymbol);
2794 size += strlen (syms[i]->name) + 2;
2795 }
2796 }
2797
2798 s = *ret = bfd_malloc (size);
2799 if (s == NULL)
2800 {
2801 count = -1;
2802 goto done;
2803 }
2804
2805 names = (char *) (s + count);
2806
2807 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2808 {
2809 asymbol *sym;
2810
2811 while (r < opd->relocation + relcount
2812 && r->address < syms[i]->value + opd->vma)
2813 ++r;
2814
2815 if (r == opd->relocation + relcount)
2816 break;
2817
2818 if (r->address != syms[i]->value + opd->vma)
2819 continue;
2820
2821 if (r->howto->type != R_PPC64_ADDR64)
2822 continue;
2823
2824 sym = *r->sym_ptr_ptr;
2825 if (!sym_exists_at (syms, opdsymend, symcount,
2826 sym->section->id, sym->value + r->addend))
2827 {
2828 size_t len;
2829
2830 *s = *syms[i];
2831 s->section = sym->section;
2832 s->value = sym->value + r->addend;
2833 s->name = names;
2834 *names++ = '.';
2835 len = strlen (syms[i]->name);
2836 memcpy (names, syms[i]->name, len + 1);
2837 names += len + 1;
2838 s++;
2839 }
2840 }
2841 }
2842 else
2843 {
2844 bfd_byte *contents;
2845 size_t size;
2846
2847 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2848 {
2849 if (contents)
2850 {
2851 free_contents_and_exit:
2852 free (contents);
2853 }
2854 count = -1;
2855 goto done;
2856 }
2857
2858 size = 0;
2859 for (i = secsymend; i < opdsymend; ++i)
2860 {
2861 bfd_vma ent;
2862
2863 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2864 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2865 {
2866 ++count;
2867 size += sizeof (asymbol);
2868 size += strlen (syms[i]->name) + 2;
2869 }
2870 }
2871
2872 s = *ret = bfd_malloc (size);
2873 if (s == NULL)
2874 goto free_contents_and_exit;
2875
2876 names = (char *) (s + count);
2877
2878 for (i = secsymend; i < opdsymend; ++i)
2879 {
2880 bfd_vma ent;
2881
2882 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2883 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2884 {
2885 long lo, hi;
2886 size_t len;
2887 asection *sec = abfd->sections;
2888
2889 *s = *syms[i];
2890 lo = codesecsym;
2891 hi = codesecsymend;
2892 while (lo < hi)
2893 {
2894 long mid = (lo + hi) >> 1;
2895 if (syms[mid]->section->vma < ent)
2896 lo = mid + 1;
2897 else if (syms[mid]->section->vma > ent)
2898 hi = mid;
2899 else
2900 {
2901 sec = syms[mid]->section;
2902 break;
2903 }
2904 }
2905
2906 if (lo >= hi && lo > codesecsym)
2907 sec = syms[lo - 1]->section;
2908
2909 for (; sec != NULL; sec = sec->next)
2910 {
2911 if (sec->vma > ent)
2912 break;
2913 if ((sec->flags & SEC_ALLOC) == 0
2914 || (sec->flags & SEC_LOAD) == 0)
2915 break;
2916 if ((sec->flags & SEC_CODE) != 0)
2917 s->section = sec;
2918 }
2919 s->value = ent - s->section->vma;
2920 s->name = names;
2921 *names++ = '.';
2922 len = strlen (syms[i]->name);
2923 memcpy (names, syms[i]->name, len + 1);
2924 names += len + 1;
2925 s++;
2926 }
2927 }
2928 free (contents);
2929 }
2930
2931 done:
2932 free (syms);
2933 return count;
2934 }
2935 \f
2936 /* The following functions are specific to the ELF linker, while
2937 functions above are used generally. Those named ppc64_elf_* are
2938 called by the main ELF linker code. They appear in this file more
2939 or less in the order in which they are called. eg.
2940 ppc64_elf_check_relocs is called early in the link process,
2941 ppc64_elf_finish_dynamic_sections is one of the last functions
2942 called.
2943
2944 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2945 functions have both a function code symbol and a function descriptor
2946 symbol. A call to foo in a relocatable object file looks like:
2947
2948 . .text
2949 . x:
2950 . bl .foo
2951 . nop
2952
2953 The function definition in another object file might be:
2954
2955 . .section .opd
2956 . foo: .quad .foo
2957 . .quad .TOC.@tocbase
2958 . .quad 0
2959 .
2960 . .text
2961 . .foo: blr
2962
2963 When the linker resolves the call during a static link, the branch
2964 unsurprisingly just goes to .foo and the .opd information is unused.
2965 If the function definition is in a shared library, things are a little
2966 different: The call goes via a plt call stub, the opd information gets
2967 copied to the plt, and the linker patches the nop.
2968
2969 . x:
2970 . bl .foo_stub
2971 . ld 2,40(1)
2972 .
2973 .
2974 . .foo_stub:
2975 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2976 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2977 . std 2,40(1) # this is the general idea
2978 . ld 11,0(12)
2979 . ld 2,8(12)
2980 . mtctr 11
2981 . ld 11,16(12)
2982 . bctr
2983 .
2984 . .section .plt
2985 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2986
2987 The "reloc ()" notation is supposed to indicate that the linker emits
2988 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2989 copying.
2990
2991 What are the difficulties here? Well, firstly, the relocations
2992 examined by the linker in check_relocs are against the function code
2993 sym .foo, while the dynamic relocation in the plt is emitted against
2994 the function descriptor symbol, foo. Somewhere along the line, we need
2995 to carefully copy dynamic link information from one symbol to the other.
2996 Secondly, the generic part of the elf linker will make .foo a dynamic
2997 symbol as is normal for most other backends. We need foo dynamic
2998 instead, at least for an application final link. However, when
2999 creating a shared library containing foo, we need to have both symbols
3000 dynamic so that references to .foo are satisfied during the early
3001 stages of linking. Otherwise the linker might decide to pull in a
3002 definition from some other object, eg. a static library.
3003
3004 Update: As of August 2004, we support a new convention. Function
3005 calls may use the function descriptor symbol, ie. "bl foo". This
3006 behaves exactly as "bl .foo". */
3007
3008 /* The linker needs to keep track of the number of relocs that it
3009 decides to copy as dynamic relocs in check_relocs for each symbol.
3010 This is so that it can later discard them if they are found to be
3011 unnecessary. We store the information in a field extending the
3012 regular ELF linker hash table. */
3013
3014 struct ppc_dyn_relocs
3015 {
3016 struct ppc_dyn_relocs *next;
3017
3018 /* The input section of the reloc. */
3019 asection *sec;
3020
3021 /* Total number of relocs copied for the input section. */
3022 bfd_size_type count;
3023
3024 /* Number of pc-relative relocs copied for the input section. */
3025 bfd_size_type pc_count;
3026 };
3027
3028 /* Track GOT entries needed for a given symbol. We might need more
3029 than one got entry per symbol. */
3030 struct got_entry
3031 {
3032 struct got_entry *next;
3033
3034 /* The symbol addend that we'll be placing in the GOT. */
3035 bfd_vma addend;
3036
3037 /* Unlike other ELF targets, we use separate GOT entries for the same
3038 symbol referenced from different input files. This is to support
3039 automatic multiple TOC/GOT sections, where the TOC base can vary
3040 from one input file to another.
3041
3042 Point to the BFD owning this GOT entry. */
3043 bfd *owner;
3044
3045 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3046 TLS_TPREL or TLS_DTPREL for tls entries. */
3047 char tls_type;
3048
3049 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3050 union
3051 {
3052 bfd_signed_vma refcount;
3053 bfd_vma offset;
3054 } got;
3055 };
3056
3057 /* The same for PLT. */
3058 struct plt_entry
3059 {
3060 struct plt_entry *next;
3061
3062 bfd_vma addend;
3063
3064 union
3065 {
3066 bfd_signed_vma refcount;
3067 bfd_vma offset;
3068 } plt;
3069 };
3070
3071 /* Of those relocs that might be copied as dynamic relocs, this macro
3072 selects those that must be copied when linking a shared library,
3073 even when the symbol is local. */
3074
3075 #define MUST_BE_DYN_RELOC(RTYPE) \
3076 ((RTYPE) != R_PPC64_REL32 \
3077 && (RTYPE) != R_PPC64_REL64 \
3078 && (RTYPE) != R_PPC64_REL30)
3079
3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3081 copying dynamic variables from a shared lib into an app's dynbss
3082 section, and instead use a dynamic relocation to point into the
3083 shared lib. With code that gcc generates, it's vital that this be
3084 enabled; In the PowerPC64 ABI, the address of a function is actually
3085 the address of a function descriptor, which resides in the .opd
3086 section. gcc uses the descriptor directly rather than going via the
3087 GOT as some other ABI's do, which means that initialized function
3088 pointers must reference the descriptor. Thus, a function pointer
3089 initialized to the address of a function in a shared library will
3090 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3091 redefines the function descriptor symbol to point to the copy. This
3092 presents a problem as a plt entry for that function is also
3093 initialized from the function descriptor symbol and the copy reloc
3094 may not be initialized first. */
3095 #define ELIMINATE_COPY_RELOCS 1
3096
3097 /* Section name for stubs is the associated section name plus this
3098 string. */
3099 #define STUB_SUFFIX ".stub"
3100
3101 /* Linker stubs.
3102 ppc_stub_long_branch:
3103 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3104 destination, but a 24 bit branch in a stub section will reach.
3105 . b dest
3106
3107 ppc_stub_plt_branch:
3108 Similar to the above, but a 24 bit branch in the stub section won't
3109 reach its destination.
3110 . addis %r12,%r2,xxx@toc@ha
3111 . ld %r11,xxx@toc@l(%r12)
3112 . mtctr %r11
3113 . bctr
3114
3115 ppc_stub_plt_call:
3116 Used to call a function in a shared library. If it so happens that
3117 the plt entry referenced crosses a 64k boundary, then an extra
3118 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3119 xxx+16 as appropriate.
3120 . addis %r12,%r2,xxx@toc@ha
3121 . std %r2,40(%r1)
3122 . ld %r11,xxx+0@toc@l(%r12)
3123 . ld %r2,xxx+8@toc@l(%r12)
3124 . mtctr %r11
3125 . ld %r11,xxx+16@toc@l(%r12)
3126 . bctr
3127
3128 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3129 code to adjust the value and save r2 to support multiple toc sections.
3130 A ppc_stub_long_branch with an r2 offset looks like:
3131 . std %r2,40(%r1)
3132 . addis %r2,%r2,off@ha
3133 . addi %r2,%r2,off@l
3134 . b dest
3135
3136 A ppc_stub_plt_branch with an r2 offset looks like:
3137 . std %r2,40(%r1)
3138 . addis %r12,%r2,xxx@toc@ha
3139 . ld %r11,xxx@toc@l(%r12)
3140 . addis %r2,%r2,off@ha
3141 . addi %r2,%r2,off@l
3142 . mtctr %r11
3143 . bctr
3144 */
3145
3146 enum ppc_stub_type {
3147 ppc_stub_none,
3148 ppc_stub_long_branch,
3149 ppc_stub_long_branch_r2off,
3150 ppc_stub_plt_branch,
3151 ppc_stub_plt_branch_r2off,
3152 ppc_stub_plt_call
3153 };
3154
3155 struct ppc_stub_hash_entry {
3156
3157 /* Base hash table entry structure. */
3158 struct bfd_hash_entry root;
3159
3160 enum ppc_stub_type stub_type;
3161
3162 /* The stub section. */
3163 asection *stub_sec;
3164
3165 /* Offset within stub_sec of the beginning of this stub. */
3166 bfd_vma stub_offset;
3167
3168 /* Given the symbol's value and its section we can determine its final
3169 value when building the stubs (so the stub knows where to jump. */
3170 bfd_vma target_value;
3171 asection *target_section;
3172
3173 /* The symbol table entry, if any, that this was derived from. */
3174 struct ppc_link_hash_entry *h;
3175
3176 /* And the reloc addend that this was derived from. */
3177 bfd_vma addend;
3178
3179 /* Where this stub is being called from, or, in the case of combined
3180 stub sections, the first input section in the group. */
3181 asection *id_sec;
3182 };
3183
3184 struct ppc_branch_hash_entry {
3185
3186 /* Base hash table entry structure. */
3187 struct bfd_hash_entry root;
3188
3189 /* Offset within .branch_lt. */
3190 unsigned int offset;
3191
3192 /* Generation marker. */
3193 unsigned int iter;
3194 };
3195
3196 struct ppc_link_hash_entry
3197 {
3198 struct elf_link_hash_entry elf;
3199
3200 /* A pointer to the most recently used stub hash entry against this
3201 symbol. */
3202 struct ppc_stub_hash_entry *stub_cache;
3203
3204 /* Track dynamic relocs copied for this symbol. */
3205 struct ppc_dyn_relocs *dyn_relocs;
3206
3207 /* Link between function code and descriptor symbols. */
3208 struct ppc_link_hash_entry *oh;
3209
3210 /* Flag function code and descriptor symbols. */
3211 unsigned int is_func:1;
3212 unsigned int is_func_descriptor:1;
3213 unsigned int fake:1;
3214
3215 /* Whether global opd/toc sym has been adjusted or not.
3216 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3217 should be set for all globals defined in any opd/toc section. */
3218 unsigned int adjust_done:1;
3219
3220 /* Set if we twiddled this symbol to weak at some stage. */
3221 unsigned int was_undefined:1;
3222
3223 /* Contexts in which symbol is used in the GOT (or TOC).
3224 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3225 corresponding relocs are encountered during check_relocs.
3226 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3227 indicate the corresponding GOT entry type is not needed.
3228 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3229 a TPREL one. We use a separate flag rather than setting TPREL
3230 just for convenience in distinguishing the two cases. */
3231 #define TLS_GD 1 /* GD reloc. */
3232 #define TLS_LD 2 /* LD reloc. */
3233 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3234 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3235 #define TLS_TLS 16 /* Any TLS reloc. */
3236 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3237 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3238 char tls_mask;
3239 };
3240
3241 /* ppc64 ELF linker hash table. */
3242
3243 struct ppc_link_hash_table
3244 {
3245 struct elf_link_hash_table elf;
3246
3247 /* The stub hash table. */
3248 struct bfd_hash_table stub_hash_table;
3249
3250 /* Another hash table for plt_branch stubs. */
3251 struct bfd_hash_table branch_hash_table;
3252
3253 /* Linker stub bfd. */
3254 bfd *stub_bfd;
3255
3256 /* Linker call-backs. */
3257 asection * (*add_stub_section) (const char *, asection *);
3258 void (*layout_sections_again) (void);
3259
3260 /* Array to keep track of which stub sections have been created, and
3261 information on stub grouping. */
3262 struct map_stub {
3263 /* This is the section to which stubs in the group will be attached. */
3264 asection *link_sec;
3265 /* The stub section. */
3266 asection *stub_sec;
3267 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3268 bfd_vma toc_off;
3269 } *stub_group;
3270
3271 /* Temp used when calculating TOC pointers. */
3272 bfd_vma toc_curr;
3273
3274 /* Highest input section id. */
3275 int top_id;
3276
3277 /* Highest output section index. */
3278 int top_index;
3279
3280 /* List of input sections for each output section. */
3281 asection **input_list;
3282
3283 /* Short-cuts to get to dynamic linker sections. */
3284 asection *got;
3285 asection *plt;
3286 asection *relplt;
3287 asection *dynbss;
3288 asection *relbss;
3289 asection *glink;
3290 asection *sfpr;
3291 asection *brlt;
3292 asection *relbrlt;
3293
3294 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3295 struct ppc_link_hash_entry *tls_get_addr;
3296 struct ppc_link_hash_entry *tls_get_addr_fd;
3297
3298 /* Statistics. */
3299 unsigned long stub_count[ppc_stub_plt_call];
3300
3301 /* Number of stubs against global syms. */
3302 unsigned long stub_globals;
3303
3304 /* Set if we should emit symbols for stubs. */
3305 unsigned int emit_stub_syms:1;
3306
3307 /* Support for multiple toc sections. */
3308 unsigned int no_multi_toc:1;
3309 unsigned int multi_toc_needed:1;
3310
3311 /* Set on error. */
3312 unsigned int stub_error:1;
3313
3314 /* Flag set when small branches are detected. Used to
3315 select suitable defaults for the stub group size. */
3316 unsigned int has_14bit_branch:1;
3317
3318 /* Temp used by ppc64_elf_check_directives. */
3319 unsigned int twiddled_syms:1;
3320
3321 /* Incremented every time we size stubs. */
3322 unsigned int stub_iteration;
3323
3324 /* Small local sym to section mapping cache. */
3325 struct sym_sec_cache sym_sec;
3326 };
3327
3328 /* Rename some of the generic section flags to better document how they
3329 are used here. */
3330 #define has_toc_reloc has_gp_reloc
3331 #define makes_toc_func_call need_finalize_relax
3332 #define call_check_in_progress reloc_done
3333
3334 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3335
3336 #define ppc_hash_table(p) \
3337 ((struct ppc_link_hash_table *) ((p)->hash))
3338
3339 #define ppc_stub_hash_lookup(table, string, create, copy) \
3340 ((struct ppc_stub_hash_entry *) \
3341 bfd_hash_lookup ((table), (string), (create), (copy)))
3342
3343 #define ppc_branch_hash_lookup(table, string, create, copy) \
3344 ((struct ppc_branch_hash_entry *) \
3345 bfd_hash_lookup ((table), (string), (create), (copy)))
3346
3347 /* Create an entry in the stub hash table. */
3348
3349 static struct bfd_hash_entry *
3350 stub_hash_newfunc (struct bfd_hash_entry *entry,
3351 struct bfd_hash_table *table,
3352 const char *string)
3353 {
3354 /* Allocate the structure if it has not already been allocated by a
3355 subclass. */
3356 if (entry == NULL)
3357 {
3358 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3359 if (entry == NULL)
3360 return entry;
3361 }
3362
3363 /* Call the allocation method of the superclass. */
3364 entry = bfd_hash_newfunc (entry, table, string);
3365 if (entry != NULL)
3366 {
3367 struct ppc_stub_hash_entry *eh;
3368
3369 /* Initialize the local fields. */
3370 eh = (struct ppc_stub_hash_entry *) entry;
3371 eh->stub_type = ppc_stub_none;
3372 eh->stub_sec = NULL;
3373 eh->stub_offset = 0;
3374 eh->target_value = 0;
3375 eh->target_section = NULL;
3376 eh->h = NULL;
3377 eh->id_sec = NULL;
3378 }
3379
3380 return entry;
3381 }
3382
3383 /* Create an entry in the branch hash table. */
3384
3385 static struct bfd_hash_entry *
3386 branch_hash_newfunc (struct bfd_hash_entry *entry,
3387 struct bfd_hash_table *table,
3388 const char *string)
3389 {
3390 /* Allocate the structure if it has not already been allocated by a
3391 subclass. */
3392 if (entry == NULL)
3393 {
3394 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3395 if (entry == NULL)
3396 return entry;
3397 }
3398
3399 /* Call the allocation method of the superclass. */
3400 entry = bfd_hash_newfunc (entry, table, string);
3401 if (entry != NULL)
3402 {
3403 struct ppc_branch_hash_entry *eh;
3404
3405 /* Initialize the local fields. */
3406 eh = (struct ppc_branch_hash_entry *) entry;
3407 eh->offset = 0;
3408 eh->iter = 0;
3409 }
3410
3411 return entry;
3412 }
3413
3414 /* Create an entry in a ppc64 ELF linker hash table. */
3415
3416 static struct bfd_hash_entry *
3417 link_hash_newfunc (struct bfd_hash_entry *entry,
3418 struct bfd_hash_table *table,
3419 const char *string)
3420 {
3421 /* Allocate the structure if it has not already been allocated by a
3422 subclass. */
3423 if (entry == NULL)
3424 {
3425 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3426 if (entry == NULL)
3427 return entry;
3428 }
3429
3430 /* Call the allocation method of the superclass. */
3431 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3432 if (entry != NULL)
3433 {
3434 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3435
3436 memset (&eh->stub_cache, 0,
3437 (sizeof (struct ppc_link_hash_entry)
3438 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3439 }
3440
3441 return entry;
3442 }
3443
3444 /* Create a ppc64 ELF linker hash table. */
3445
3446 static struct bfd_link_hash_table *
3447 ppc64_elf_link_hash_table_create (bfd *abfd)
3448 {
3449 struct ppc_link_hash_table *htab;
3450 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3451
3452 htab = bfd_zmalloc (amt);
3453 if (htab == NULL)
3454 return NULL;
3455
3456 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3457 {
3458 free (htab);
3459 return NULL;
3460 }
3461
3462 /* Init the stub hash table too. */
3463 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3464 return NULL;
3465
3466 /* And the branch hash table. */
3467 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3468 return NULL;
3469
3470 /* Initializing two fields of the union is just cosmetic. We really
3471 only care about glist, but when compiled on a 32-bit host the
3472 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3473 debugger inspection of these fields look nicer. */
3474 htab->elf.init_refcount.refcount = 0;
3475 htab->elf.init_refcount.glist = NULL;
3476 htab->elf.init_offset.offset = 0;
3477 htab->elf.init_offset.glist = NULL;
3478
3479 return &htab->elf.root;
3480 }
3481
3482 /* Free the derived linker hash table. */
3483
3484 static void
3485 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3486 {
3487 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3488
3489 bfd_hash_table_free (&ret->stub_hash_table);
3490 bfd_hash_table_free (&ret->branch_hash_table);
3491 _bfd_generic_link_hash_table_free (hash);
3492 }
3493
3494 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3495
3496 void
3497 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3498 {
3499 struct ppc_link_hash_table *htab;
3500
3501 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3502
3503 /* Always hook our dynamic sections into the first bfd, which is the
3504 linker created stub bfd. This ensures that the GOT header is at
3505 the start of the output TOC section. */
3506 htab = ppc_hash_table (info);
3507 htab->stub_bfd = abfd;
3508 htab->elf.dynobj = abfd;
3509 }
3510
3511 /* Build a name for an entry in the stub hash table. */
3512
3513 static char *
3514 ppc_stub_name (const asection *input_section,
3515 const asection *sym_sec,
3516 const struct ppc_link_hash_entry *h,
3517 const Elf_Internal_Rela *rel)
3518 {
3519 char *stub_name;
3520 bfd_size_type len;
3521
3522 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3523 offsets from a sym as a branch target? In fact, we could
3524 probably assume the addend is always zero. */
3525 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3526
3527 if (h)
3528 {
3529 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3530 stub_name = bfd_malloc (len);
3531 if (stub_name != NULL)
3532 {
3533 sprintf (stub_name, "%08x.%s+%x",
3534 input_section->id & 0xffffffff,
3535 h->elf.root.root.string,
3536 (int) rel->r_addend & 0xffffffff);
3537 }
3538 }
3539 else
3540 {
3541 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3542 stub_name = bfd_malloc (len);
3543 if (stub_name != NULL)
3544 {
3545 sprintf (stub_name, "%08x.%x:%x+%x",
3546 input_section->id & 0xffffffff,
3547 sym_sec->id & 0xffffffff,
3548 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3549 (int) rel->r_addend & 0xffffffff);
3550 }
3551 }
3552 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3553 stub_name[len - 2] = 0;
3554 return stub_name;
3555 }
3556
3557 /* Look up an entry in the stub hash. Stub entries are cached because
3558 creating the stub name takes a bit of time. */
3559
3560 static struct ppc_stub_hash_entry *
3561 ppc_get_stub_entry (const asection *input_section,
3562 const asection *sym_sec,
3563 struct ppc_link_hash_entry *h,
3564 const Elf_Internal_Rela *rel,
3565 struct ppc_link_hash_table *htab)
3566 {
3567 struct ppc_stub_hash_entry *stub_entry;
3568 const asection *id_sec;
3569
3570 /* If this input section is part of a group of sections sharing one
3571 stub section, then use the id of the first section in the group.
3572 Stub names need to include a section id, as there may well be
3573 more than one stub used to reach say, printf, and we need to
3574 distinguish between them. */
3575 id_sec = htab->stub_group[input_section->id].link_sec;
3576
3577 if (h != NULL && h->stub_cache != NULL
3578 && h->stub_cache->h == h
3579 && h->stub_cache->id_sec == id_sec)
3580 {
3581 stub_entry = h->stub_cache;
3582 }
3583 else
3584 {
3585 char *stub_name;
3586
3587 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3588 if (stub_name == NULL)
3589 return NULL;
3590
3591 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3592 stub_name, FALSE, FALSE);
3593 if (h != NULL)
3594 h->stub_cache = stub_entry;
3595
3596 free (stub_name);
3597 }
3598
3599 return stub_entry;
3600 }
3601
3602 /* Add a new stub entry to the stub hash. Not all fields of the new
3603 stub entry are initialised. */
3604
3605 static struct ppc_stub_hash_entry *
3606 ppc_add_stub (const char *stub_name,
3607 asection *section,
3608 struct ppc_link_hash_table *htab)
3609 {
3610 asection *link_sec;
3611 asection *stub_sec;
3612 struct ppc_stub_hash_entry *stub_entry;
3613
3614 link_sec = htab->stub_group[section->id].link_sec;
3615 stub_sec = htab->stub_group[section->id].stub_sec;
3616 if (stub_sec == NULL)
3617 {
3618 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3619 if (stub_sec == NULL)
3620 {
3621 size_t namelen;
3622 bfd_size_type len;
3623 char *s_name;
3624
3625 namelen = strlen (link_sec->name);
3626 len = namelen + sizeof (STUB_SUFFIX);
3627 s_name = bfd_alloc (htab->stub_bfd, len);
3628 if (s_name == NULL)
3629 return NULL;
3630
3631 memcpy (s_name, link_sec->name, namelen);
3632 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3633 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3634 if (stub_sec == NULL)
3635 return NULL;
3636 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3637 }
3638 htab->stub_group[section->id].stub_sec = stub_sec;
3639 }
3640
3641 /* Enter this entry into the linker stub hash table. */
3642 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3643 TRUE, FALSE);
3644 if (stub_entry == NULL)
3645 {
3646 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3647 section->owner, stub_name);
3648 return NULL;
3649 }
3650
3651 stub_entry->stub_sec = stub_sec;
3652 stub_entry->stub_offset = 0;
3653 stub_entry->id_sec = link_sec;
3654 return stub_entry;
3655 }
3656
3657 /* Create sections for linker generated code. */
3658
3659 static bfd_boolean
3660 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3661 {
3662 struct ppc_link_hash_table *htab;
3663 flagword flags;
3664
3665 htab = ppc_hash_table (info);
3666
3667 /* Create .sfpr for code to save and restore fp regs. */
3668 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3669 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3670 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3671 if (htab->sfpr == NULL
3672 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3673 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3674 return FALSE;
3675
3676 /* Create .glink for lazy dynamic linking support. */
3677 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3678 if (htab->glink == NULL
3679 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3680 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3681 return FALSE;
3682
3683 /* Create .branch_lt for plt_branch stubs. */
3684 flags = (SEC_ALLOC | SEC_LOAD
3685 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3686 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3687 if (htab->brlt == NULL
3688 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3689 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3690 return FALSE;
3691
3692 if (info->shared || info->emitrelocations)
3693 {
3694 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3695 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3696 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3697 if (!htab->relbrlt
3698 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3699 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3700 return FALSE;
3701 }
3702 return TRUE;
3703 }
3704
3705 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3706 not already done. */
3707
3708 static bfd_boolean
3709 create_got_section (bfd *abfd, struct bfd_link_info *info)
3710 {
3711 asection *got, *relgot;
3712 flagword flags;
3713 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3714
3715 if (!htab->got)
3716 {
3717 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3718 return FALSE;
3719
3720 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3721 if (!htab->got)
3722 abort ();
3723 }
3724
3725 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3726 | SEC_LINKER_CREATED);
3727
3728 got = bfd_make_section (abfd, ".got");
3729 if (!got
3730 || !bfd_set_section_flags (abfd, got, flags)
3731 || !bfd_set_section_alignment (abfd, got, 3))
3732 return FALSE;
3733
3734 relgot = bfd_make_section (abfd, ".rela.got");
3735 if (!relgot
3736 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3737 || ! bfd_set_section_alignment (abfd, relgot, 3))
3738 return FALSE;
3739
3740 ppc64_elf_tdata (abfd)->got = got;
3741 ppc64_elf_tdata (abfd)->relgot = relgot;
3742 return TRUE;
3743 }
3744
3745 /* Create the dynamic sections, and set up shortcuts. */
3746
3747 static bfd_boolean
3748 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3749 {
3750 struct ppc_link_hash_table *htab;
3751
3752 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3753 return FALSE;
3754
3755 htab = ppc_hash_table (info);
3756 if (!htab->got)
3757 htab->got = bfd_get_section_by_name (dynobj, ".got");
3758 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3759 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3760 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3761 if (!info->shared)
3762 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3763
3764 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3765 || (!info->shared && !htab->relbss))
3766 abort ();
3767
3768 return TRUE;
3769 }
3770
3771 /* Merge PLT info on FROM with that on TO. */
3772
3773 static void
3774 move_plt_plist (struct ppc_link_hash_entry *from,
3775 struct ppc_link_hash_entry *to)
3776 {
3777 if (from->elf.plt.plist != NULL)
3778 {
3779 if (to->elf.plt.plist != NULL)
3780 {
3781 struct plt_entry **entp;
3782 struct plt_entry *ent;
3783
3784 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3785 {
3786 struct plt_entry *dent;
3787
3788 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3789 if (dent->addend == ent->addend)
3790 {
3791 dent->plt.refcount += ent->plt.refcount;
3792 *entp = ent->next;
3793 break;
3794 }
3795 if (dent == NULL)
3796 entp = &ent->next;
3797 }
3798 *entp = to->elf.plt.plist;
3799 }
3800
3801 to->elf.plt.plist = from->elf.plt.plist;
3802 from->elf.plt.plist = NULL;
3803 }
3804 }
3805
3806 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3807
3808 static void
3809 ppc64_elf_copy_indirect_symbol
3810 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3811 struct elf_link_hash_entry *dir,
3812 struct elf_link_hash_entry *ind)
3813 {
3814 struct ppc_link_hash_entry *edir, *eind;
3815
3816 edir = (struct ppc_link_hash_entry *) dir;
3817 eind = (struct ppc_link_hash_entry *) ind;
3818
3819 /* Copy over any dynamic relocs we may have on the indirect sym. */
3820 if (eind->dyn_relocs != NULL)
3821 {
3822 if (edir->dyn_relocs != NULL)
3823 {
3824 struct ppc_dyn_relocs **pp;
3825 struct ppc_dyn_relocs *p;
3826
3827 if (eind->elf.root.type == bfd_link_hash_indirect)
3828 abort ();
3829
3830 /* Add reloc counts against the weak sym to the strong sym
3831 list. Merge any entries against the same section. */
3832 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3833 {
3834 struct ppc_dyn_relocs *q;
3835
3836 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3837 if (q->sec == p->sec)
3838 {
3839 q->pc_count += p->pc_count;
3840 q->count += p->count;
3841 *pp = p->next;
3842 break;
3843 }
3844 if (q == NULL)
3845 pp = &p->next;
3846 }
3847 *pp = edir->dyn_relocs;
3848 }
3849
3850 edir->dyn_relocs = eind->dyn_relocs;
3851 eind->dyn_relocs = NULL;
3852 }
3853
3854 edir->is_func |= eind->is_func;
3855 edir->is_func_descriptor |= eind->is_func_descriptor;
3856 edir->tls_mask |= eind->tls_mask;
3857
3858 /* If called to transfer flags for a weakdef during processing
3859 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3860 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3861 if (!(ELIMINATE_COPY_RELOCS
3862 && eind->elf.root.type != bfd_link_hash_indirect
3863 && edir->elf.dynamic_adjusted))
3864 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3865
3866 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3867 edir->elf.ref_regular |= eind->elf.ref_regular;
3868 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3869 edir->elf.needs_plt |= eind->elf.needs_plt;
3870
3871 /* If we were called to copy over info for a weak sym, that's all. */
3872 if (eind->elf.root.type != bfd_link_hash_indirect)
3873 return;
3874
3875 /* Copy over got entries that we may have already seen to the
3876 symbol which just became indirect. */
3877 if (eind->elf.got.glist != NULL)
3878 {
3879 if (edir->elf.got.glist != NULL)
3880 {
3881 struct got_entry **entp;
3882 struct got_entry *ent;
3883
3884 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3885 {
3886 struct got_entry *dent;
3887
3888 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3889 if (dent->addend == ent->addend
3890 && dent->owner == ent->owner
3891 && dent->tls_type == ent->tls_type)
3892 {
3893 dent->got.refcount += ent->got.refcount;
3894 *entp = ent->next;
3895 break;
3896 }
3897 if (dent == NULL)
3898 entp = &ent->next;
3899 }
3900 *entp = edir->elf.got.glist;
3901 }
3902
3903 edir->elf.got.glist = eind->elf.got.glist;
3904 eind->elf.got.glist = NULL;
3905 }
3906
3907 /* And plt entries. */
3908 move_plt_plist (eind, edir);
3909
3910 if (edir->elf.dynindx == -1)
3911 {
3912 edir->elf.dynindx = eind->elf.dynindx;
3913 edir->elf.dynstr_index = eind->elf.dynstr_index;
3914 eind->elf.dynindx = -1;
3915 eind->elf.dynstr_index = 0;
3916 }
3917 else
3918 BFD_ASSERT (eind->elf.dynindx == -1);
3919 }
3920
3921 /* Find the function descriptor hash entry from the given function code
3922 hash entry FH. Link the entries via their OH fields. */
3923
3924 static struct ppc_link_hash_entry *
3925 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3926 {
3927 struct ppc_link_hash_entry *fdh = fh->oh;
3928
3929 if (fdh == NULL)
3930 {
3931 const char *fd_name = fh->elf.root.root.string + 1;
3932
3933 fdh = (struct ppc_link_hash_entry *)
3934 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3935 if (fdh != NULL)
3936 {
3937 fdh->is_func_descriptor = 1;
3938 fdh->oh = fh;
3939 fh->is_func = 1;
3940 fh->oh = fdh;
3941 }
3942 }
3943
3944 return fdh;
3945 }
3946
3947 /* Make a fake function descriptor sym for the code sym FH. */
3948
3949 static struct ppc_link_hash_entry *
3950 make_fdh (struct bfd_link_info *info,
3951 struct ppc_link_hash_entry *fh)
3952 {
3953 bfd *abfd;
3954 asymbol *newsym;
3955 struct bfd_link_hash_entry *bh;
3956 struct ppc_link_hash_entry *fdh;
3957
3958 abfd = fh->elf.root.u.undef.abfd;
3959 newsym = bfd_make_empty_symbol (abfd);
3960 newsym->name = fh->elf.root.root.string + 1;
3961 newsym->section = bfd_und_section_ptr;
3962 newsym->value = 0;
3963 newsym->flags = BSF_WEAK;
3964
3965 bh = NULL;
3966 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
3967 newsym->flags, newsym->section,
3968 newsym->value, NULL, FALSE, FALSE,
3969 &bh))
3970 return NULL;
3971
3972 fdh = (struct ppc_link_hash_entry *) bh;
3973 fdh->elf.non_elf = 0;
3974 fdh->fake = 1;
3975 fdh->is_func_descriptor = 1;
3976 fdh->oh = fh;
3977 fh->is_func = 1;
3978 fh->oh = fdh;
3979 return fdh;
3980 }
3981
3982 /* Hacks to support old ABI code.
3983 When making function calls, old ABI code references function entry
3984 points (dot symbols), while new ABI code references the function
3985 descriptor symbol. We need to make any combination of reference and
3986 definition work together, without breaking archive linking.
3987
3988 For a defined function "foo" and an undefined call to "bar":
3989 An old object defines "foo" and ".foo", references ".bar" (possibly
3990 "bar" too).
3991 A new object defines "foo" and references "bar".
3992
3993 A new object thus has no problem with its undefined symbols being
3994 satisfied by definitions in an old object. On the other hand, the
3995 old object won't have ".bar" satisfied by a new object. */
3996
3997 /* Fix function descriptor symbols defined in .opd sections to be
3998 function type. */
3999
4000 static bfd_boolean
4001 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4002 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4003 Elf_Internal_Sym *isym,
4004 const char **name ATTRIBUTE_UNUSED,
4005 flagword *flags ATTRIBUTE_UNUSED,
4006 asection **sec,
4007 bfd_vma *value ATTRIBUTE_UNUSED)
4008 {
4009 if (*sec != NULL
4010 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4011 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4012 return TRUE;
4013 }
4014
4015 /* This function makes an old ABI object reference to ".bar" cause the
4016 inclusion of a new ABI object archive that defines "bar".
4017 NAME is a symbol defined in an archive. Return a symbol in the hash
4018 table that might be satisfied by the archive symbols. */
4019
4020 static struct elf_link_hash_entry *
4021 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4022 struct bfd_link_info *info,
4023 const char *name)
4024 {
4025 struct elf_link_hash_entry *h;
4026 char *dot_name;
4027 size_t len;
4028
4029 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4030 if (h != NULL
4031 /* Don't return this sym if it is a fake function descriptor
4032 created by add_symbol_adjust. */
4033 && !(h->root.type == bfd_link_hash_undefweak
4034 && ((struct ppc_link_hash_entry *) h)->fake))
4035 return h;
4036
4037 if (name[0] == '.')
4038 return h;
4039
4040 len = strlen (name);
4041 dot_name = bfd_alloc (abfd, len + 2);
4042 if (dot_name == NULL)
4043 return (struct elf_link_hash_entry *) 0 - 1;
4044 dot_name[0] = '.';
4045 memcpy (dot_name + 1, name, len + 1);
4046 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4047 bfd_release (abfd, dot_name);
4048 return h;
4049 }
4050
4051 /* This function satisfies all old ABI object references to ".bar" if a
4052 new ABI object defines "bar". Well, at least, undefined dot symbols
4053 are made weak. This stops later archive searches from including an
4054 object if we already have a function descriptor definition. It also
4055 prevents the linker complaining about undefined symbols.
4056 We also check and correct mismatched symbol visibility here. The
4057 most restrictive visibility of the function descriptor and the
4058 function entry symbol is used. */
4059
4060 struct add_symbol_adjust_data
4061 {
4062 struct bfd_link_info *info;
4063 bfd_boolean ok;
4064 };
4065
4066 static bfd_boolean
4067 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4068 {
4069 struct add_symbol_adjust_data *data;
4070 struct ppc_link_hash_table *htab;
4071 struct ppc_link_hash_entry *eh;
4072 struct ppc_link_hash_entry *fdh;
4073
4074 if (h->root.type == bfd_link_hash_indirect)
4075 return TRUE;
4076
4077 if (h->root.type == bfd_link_hash_warning)
4078 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4079
4080 if (h->root.root.string[0] != '.')
4081 return TRUE;
4082
4083 data = inf;
4084 htab = ppc_hash_table (data->info);
4085 eh = (struct ppc_link_hash_entry *) h;
4086 fdh = get_fdh (eh, htab);
4087 if (fdh == NULL
4088 && !data->info->relocatable
4089 && (eh->elf.root.type == bfd_link_hash_undefined
4090 || eh->elf.root.type == bfd_link_hash_undefweak)
4091 && eh->elf.ref_regular)
4092 {
4093 /* Make an undefweak function descriptor sym, which is enough to
4094 pull in an --as-needed shared lib, but won't cause link
4095 errors. Archives are handled elsewhere. */
4096 fdh = make_fdh (data->info, eh);
4097 if (fdh == NULL)
4098 data->ok = FALSE;
4099 else
4100 fdh->elf.ref_regular = 1;
4101 }
4102 else if (fdh != NULL
4103 && (fdh->elf.root.type == bfd_link_hash_defined
4104 || fdh->elf.root.type == bfd_link_hash_defweak))
4105 {
4106 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4107 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4108 if (entry_vis < descr_vis)
4109 fdh->elf.other += entry_vis - descr_vis;
4110 else if (entry_vis > descr_vis)
4111 eh->elf.other += descr_vis - entry_vis;
4112
4113 if (eh->elf.root.type == bfd_link_hash_undefined)
4114 {
4115 eh->elf.root.type = bfd_link_hash_undefweak;
4116 eh->was_undefined = 1;
4117 htab->twiddled_syms = 1;
4118 }
4119 }
4120
4121 return TRUE;
4122 }
4123
4124 static bfd_boolean
4125 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4126 struct bfd_link_info *info)
4127 {
4128 struct ppc_link_hash_table *htab;
4129 struct add_symbol_adjust_data data;
4130
4131 htab = ppc_hash_table (info);
4132 if (!is_ppc64_elf_target (htab->elf.root.creator))
4133 return TRUE;
4134
4135 data.info = info;
4136 data.ok = TRUE;
4137 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4138
4139 /* We need to fix the undefs list for any syms we have twiddled to
4140 undef_weak. */
4141 if (htab->twiddled_syms)
4142 {
4143 bfd_link_repair_undef_list (&htab->elf.root);
4144 htab->twiddled_syms = 0;
4145 }
4146 return data.ok;
4147 }
4148
4149 static bfd_boolean
4150 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4151 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4152 {
4153 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4154 char *local_got_tls_masks;
4155
4156 if (local_got_ents == NULL)
4157 {
4158 bfd_size_type size = symtab_hdr->sh_info;
4159
4160 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4161 local_got_ents = bfd_zalloc (abfd, size);
4162 if (local_got_ents == NULL)
4163 return FALSE;
4164 elf_local_got_ents (abfd) = local_got_ents;
4165 }
4166
4167 if ((tls_type & TLS_EXPLICIT) == 0)
4168 {
4169 struct got_entry *ent;
4170
4171 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4172 if (ent->addend == r_addend
4173 && ent->owner == abfd
4174 && ent->tls_type == tls_type)
4175 break;
4176 if (ent == NULL)
4177 {
4178 bfd_size_type amt = sizeof (*ent);
4179 ent = bfd_alloc (abfd, amt);
4180 if (ent == NULL)
4181 return FALSE;
4182 ent->next = local_got_ents[r_symndx];
4183 ent->addend = r_addend;
4184 ent->owner = abfd;
4185 ent->tls_type = tls_type;
4186 ent->got.refcount = 0;
4187 local_got_ents[r_symndx] = ent;
4188 }
4189 ent->got.refcount += 1;
4190 }
4191
4192 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4193 local_got_tls_masks[r_symndx] |= tls_type;
4194 return TRUE;
4195 }
4196
4197 static bfd_boolean
4198 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4199 {
4200 struct plt_entry *ent;
4201
4202 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4203 if (ent->addend == addend)
4204 break;
4205 if (ent == NULL)
4206 {
4207 bfd_size_type amt = sizeof (*ent);
4208 ent = bfd_alloc (abfd, amt);
4209 if (ent == NULL)
4210 return FALSE;
4211 ent->next = eh->elf.plt.plist;
4212 ent->addend = addend;
4213 ent->plt.refcount = 0;
4214 eh->elf.plt.plist = ent;
4215 }
4216 ent->plt.refcount += 1;
4217 eh->elf.needs_plt = 1;
4218 if (eh->elf.root.root.string[0] == '.'
4219 && eh->elf.root.root.string[1] != '\0')
4220 eh->is_func = 1;
4221 return TRUE;
4222 }
4223
4224 /* Look through the relocs for a section during the first phase, and
4225 calculate needed space in the global offset table, procedure
4226 linkage table, and dynamic reloc sections. */
4227
4228 static bfd_boolean
4229 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4230 asection *sec, const Elf_Internal_Rela *relocs)
4231 {
4232 struct ppc_link_hash_table *htab;
4233 Elf_Internal_Shdr *symtab_hdr;
4234 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4235 const Elf_Internal_Rela *rel;
4236 const Elf_Internal_Rela *rel_end;
4237 asection *sreloc;
4238 asection **opd_sym_map;
4239
4240 if (info->relocatable)
4241 return TRUE;
4242
4243 /* Don't do anything special with non-loaded, non-alloced sections.
4244 In particular, any relocs in such sections should not affect GOT
4245 and PLT reference counting (ie. we don't allow them to create GOT
4246 or PLT entries), there's no possibility or desire to optimize TLS
4247 relocs, and there's not much point in propagating relocs to shared
4248 libs that the dynamic linker won't relocate. */
4249 if ((sec->flags & SEC_ALLOC) == 0)
4250 return TRUE;
4251
4252 htab = ppc_hash_table (info);
4253 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4254
4255 sym_hashes = elf_sym_hashes (abfd);
4256 sym_hashes_end = (sym_hashes
4257 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4258 - symtab_hdr->sh_info);
4259
4260 sreloc = NULL;
4261 opd_sym_map = NULL;
4262 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4263 {
4264 /* Garbage collection needs some extra help with .opd sections.
4265 We don't want to necessarily keep everything referenced by
4266 relocs in .opd, as that would keep all functions. Instead,
4267 if we reference an .opd symbol (a function descriptor), we
4268 want to keep the function code symbol's section. This is
4269 easy for global symbols, but for local syms we need to keep
4270 information about the associated function section. Later, if
4271 edit_opd deletes entries, we'll use this array to adjust
4272 local syms in .opd. */
4273 union opd_info {
4274 asection *func_section;
4275 long entry_adjust;
4276 };
4277 bfd_size_type amt;
4278
4279 amt = sec->size * sizeof (union opd_info) / 8;
4280 opd_sym_map = bfd_zalloc (abfd, amt);
4281 if (opd_sym_map == NULL)
4282 return FALSE;
4283 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4284 }
4285
4286 if (htab->sfpr == NULL
4287 && !create_linkage_sections (htab->elf.dynobj, info))
4288 return FALSE;
4289
4290 rel_end = relocs + sec->reloc_count;
4291 for (rel = relocs; rel < rel_end; rel++)
4292 {
4293 unsigned long r_symndx;
4294 struct elf_link_hash_entry *h;
4295 enum elf_ppc64_reloc_type r_type;
4296 int tls_type = 0;
4297
4298 r_symndx = ELF64_R_SYM (rel->r_info);
4299 if (r_symndx < symtab_hdr->sh_info)
4300 h = NULL;
4301 else
4302 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4303
4304 r_type = ELF64_R_TYPE (rel->r_info);
4305 switch (r_type)
4306 {
4307 case R_PPC64_GOT_TLSLD16:
4308 case R_PPC64_GOT_TLSLD16_LO:
4309 case R_PPC64_GOT_TLSLD16_HI:
4310 case R_PPC64_GOT_TLSLD16_HA:
4311 ppc64_tlsld_got (abfd)->refcount += 1;
4312 tls_type = TLS_TLS | TLS_LD;
4313 goto dogottls;
4314
4315 case R_PPC64_GOT_TLSGD16:
4316 case R_PPC64_GOT_TLSGD16_LO:
4317 case R_PPC64_GOT_TLSGD16_HI:
4318 case R_PPC64_GOT_TLSGD16_HA:
4319 tls_type = TLS_TLS | TLS_GD;
4320 goto dogottls;
4321
4322 case R_PPC64_GOT_TPREL16_DS:
4323 case R_PPC64_GOT_TPREL16_LO_DS:
4324 case R_PPC64_GOT_TPREL16_HI:
4325 case R_PPC64_GOT_TPREL16_HA:
4326 if (info->shared)
4327 info->flags |= DF_STATIC_TLS;
4328 tls_type = TLS_TLS | TLS_TPREL;
4329 goto dogottls;
4330
4331 case R_PPC64_GOT_DTPREL16_DS:
4332 case R_PPC64_GOT_DTPREL16_LO_DS:
4333 case R_PPC64_GOT_DTPREL16_HI:
4334 case R_PPC64_GOT_DTPREL16_HA:
4335 tls_type = TLS_TLS | TLS_DTPREL;
4336 dogottls:
4337 sec->has_tls_reloc = 1;
4338 /* Fall thru */
4339
4340 case R_PPC64_GOT16:
4341 case R_PPC64_GOT16_DS:
4342 case R_PPC64_GOT16_HA:
4343 case R_PPC64_GOT16_HI:
4344 case R_PPC64_GOT16_LO:
4345 case R_PPC64_GOT16_LO_DS:
4346 /* This symbol requires a global offset table entry. */
4347 sec->has_toc_reloc = 1;
4348 if (ppc64_elf_tdata (abfd)->got == NULL
4349 && !create_got_section (abfd, info))
4350 return FALSE;
4351
4352 if (h != NULL)
4353 {
4354 struct ppc_link_hash_entry *eh;
4355 struct got_entry *ent;
4356
4357 eh = (struct ppc_link_hash_entry *) h;
4358 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4359 if (ent->addend == rel->r_addend
4360 && ent->owner == abfd
4361 && ent->tls_type == tls_type)
4362 break;
4363 if (ent == NULL)
4364 {
4365 bfd_size_type amt = sizeof (*ent);
4366 ent = bfd_alloc (abfd, amt);
4367 if (ent == NULL)
4368 return FALSE;
4369 ent->next = eh->elf.got.glist;
4370 ent->addend = rel->r_addend;
4371 ent->owner = abfd;
4372 ent->tls_type = tls_type;
4373 ent->got.refcount = 0;
4374 eh->elf.got.glist = ent;
4375 }
4376 ent->got.refcount += 1;
4377 eh->tls_mask |= tls_type;
4378 }
4379 else
4380 /* This is a global offset table entry for a local symbol. */
4381 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4382 rel->r_addend, tls_type))
4383 return FALSE;
4384 break;
4385
4386 case R_PPC64_PLT16_HA:
4387 case R_PPC64_PLT16_HI:
4388 case R_PPC64_PLT16_LO:
4389 case R_PPC64_PLT32:
4390 case R_PPC64_PLT64:
4391 /* This symbol requires a procedure linkage table entry. We
4392 actually build the entry in adjust_dynamic_symbol,
4393 because this might be a case of linking PIC code without
4394 linking in any dynamic objects, in which case we don't
4395 need to generate a procedure linkage table after all. */
4396 if (h == NULL)
4397 {
4398 /* It does not make sense to have a procedure linkage
4399 table entry for a local symbol. */
4400 bfd_set_error (bfd_error_bad_value);
4401 return FALSE;
4402 }
4403 else
4404 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4405 rel->r_addend))
4406 return FALSE;
4407 break;
4408
4409 /* The following relocations don't need to propagate the
4410 relocation if linking a shared object since they are
4411 section relative. */
4412 case R_PPC64_SECTOFF:
4413 case R_PPC64_SECTOFF_LO:
4414 case R_PPC64_SECTOFF_HI:
4415 case R_PPC64_SECTOFF_HA:
4416 case R_PPC64_SECTOFF_DS:
4417 case R_PPC64_SECTOFF_LO_DS:
4418 case R_PPC64_DTPREL16:
4419 case R_PPC64_DTPREL16_LO:
4420 case R_PPC64_DTPREL16_HI:
4421 case R_PPC64_DTPREL16_HA:
4422 case R_PPC64_DTPREL16_DS:
4423 case R_PPC64_DTPREL16_LO_DS:
4424 case R_PPC64_DTPREL16_HIGHER:
4425 case R_PPC64_DTPREL16_HIGHERA:
4426 case R_PPC64_DTPREL16_HIGHEST:
4427 case R_PPC64_DTPREL16_HIGHESTA:
4428 break;
4429
4430 /* Nor do these. */
4431 case R_PPC64_TOC16:
4432 case R_PPC64_TOC16_LO:
4433 case R_PPC64_TOC16_HI:
4434 case R_PPC64_TOC16_HA:
4435 case R_PPC64_TOC16_DS:
4436 case R_PPC64_TOC16_LO_DS:
4437 sec->has_toc_reloc = 1;
4438 break;
4439
4440 /* This relocation describes the C++ object vtable hierarchy.
4441 Reconstruct it for later use during GC. */
4442 case R_PPC64_GNU_VTINHERIT:
4443 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4444 return FALSE;
4445 break;
4446
4447 /* This relocation describes which C++ vtable entries are actually
4448 used. Record for later use during GC. */
4449 case R_PPC64_GNU_VTENTRY:
4450 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4451 return FALSE;
4452 break;
4453
4454 case R_PPC64_REL14:
4455 case R_PPC64_REL14_BRTAKEN:
4456 case R_PPC64_REL14_BRNTAKEN:
4457 htab->has_14bit_branch = 1;
4458 /* Fall through. */
4459
4460 case R_PPC64_REL24:
4461 if (h != NULL)
4462 {
4463 /* We may need a .plt entry if the function this reloc
4464 refers to is in a shared lib. */
4465 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4466 rel->r_addend))
4467 return FALSE;
4468 if (h == &htab->tls_get_addr->elf
4469 || h == &htab->tls_get_addr_fd->elf)
4470 sec->has_tls_reloc = 1;
4471 else if (htab->tls_get_addr == NULL
4472 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4473 && (h->root.root.string[15] == 0
4474 || h->root.root.string[15] == '@'))
4475 {
4476 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4477 sec->has_tls_reloc = 1;
4478 }
4479 else if (htab->tls_get_addr_fd == NULL
4480 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4481 && (h->root.root.string[14] == 0
4482 || h->root.root.string[14] == '@'))
4483 {
4484 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4485 sec->has_tls_reloc = 1;
4486 }
4487 }
4488 break;
4489
4490 case R_PPC64_TPREL64:
4491 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4492 if (info->shared)
4493 info->flags |= DF_STATIC_TLS;
4494 goto dotlstoc;
4495
4496 case R_PPC64_DTPMOD64:
4497 if (rel + 1 < rel_end
4498 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4499 && rel[1].r_offset == rel->r_offset + 8)
4500 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4501 else
4502 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4503 goto dotlstoc;
4504
4505 case R_PPC64_DTPREL64:
4506 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4507 if (rel != relocs
4508 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4509 && rel[-1].r_offset == rel->r_offset - 8)
4510 /* This is the second reloc of a dtpmod, dtprel pair.
4511 Don't mark with TLS_DTPREL. */
4512 goto dodyn;
4513
4514 dotlstoc:
4515 sec->has_tls_reloc = 1;
4516 if (h != NULL)
4517 {
4518 struct ppc_link_hash_entry *eh;
4519 eh = (struct ppc_link_hash_entry *) h;
4520 eh->tls_mask |= tls_type;
4521 }
4522 else
4523 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4524 rel->r_addend, tls_type))
4525 return FALSE;
4526
4527 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4528 {
4529 /* One extra to simplify get_tls_mask. */
4530 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4531 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4532 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4533 return FALSE;
4534 }
4535 BFD_ASSERT (rel->r_offset % 8 == 0);
4536 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4537
4538 /* Mark the second slot of a GD or LD entry.
4539 -1 to indicate GD and -2 to indicate LD. */
4540 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4541 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4542 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4543 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4544 goto dodyn;
4545
4546 case R_PPC64_TPREL16:
4547 case R_PPC64_TPREL16_LO:
4548 case R_PPC64_TPREL16_HI:
4549 case R_PPC64_TPREL16_HA:
4550 case R_PPC64_TPREL16_DS:
4551 case R_PPC64_TPREL16_LO_DS:
4552 case R_PPC64_TPREL16_HIGHER:
4553 case R_PPC64_TPREL16_HIGHERA:
4554 case R_PPC64_TPREL16_HIGHEST:
4555 case R_PPC64_TPREL16_HIGHESTA:
4556 if (info->shared)
4557 {
4558 info->flags |= DF_STATIC_TLS;
4559 goto dodyn;
4560 }
4561 break;
4562
4563 case R_PPC64_ADDR64:
4564 if (opd_sym_map != NULL
4565 && rel + 1 < rel_end
4566 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4567 {
4568 if (h != NULL)
4569 {
4570 if (h->root.root.string[0] == '.'
4571 && h->root.root.string[1] != 0
4572 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4573 ;
4574 else
4575 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4576 }
4577 else
4578 {
4579 asection *s;
4580
4581 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4582 r_symndx);
4583 if (s == NULL)
4584 return FALSE;
4585 else if (s != sec)
4586 opd_sym_map[rel->r_offset / 8] = s;
4587 }
4588 }
4589 /* Fall through. */
4590
4591 case R_PPC64_REL30:
4592 case R_PPC64_REL32:
4593 case R_PPC64_REL64:
4594 case R_PPC64_ADDR14:
4595 case R_PPC64_ADDR14_BRNTAKEN:
4596 case R_PPC64_ADDR14_BRTAKEN:
4597 case R_PPC64_ADDR16:
4598 case R_PPC64_ADDR16_DS:
4599 case R_PPC64_ADDR16_HA:
4600 case R_PPC64_ADDR16_HI:
4601 case R_PPC64_ADDR16_HIGHER:
4602 case R_PPC64_ADDR16_HIGHERA:
4603 case R_PPC64_ADDR16_HIGHEST:
4604 case R_PPC64_ADDR16_HIGHESTA:
4605 case R_PPC64_ADDR16_LO:
4606 case R_PPC64_ADDR16_LO_DS:
4607 case R_PPC64_ADDR24:
4608 case R_PPC64_ADDR32:
4609 case R_PPC64_UADDR16:
4610 case R_PPC64_UADDR32:
4611 case R_PPC64_UADDR64:
4612 case R_PPC64_TOC:
4613 if (h != NULL && !info->shared)
4614 /* We may need a copy reloc. */
4615 h->non_got_ref = 1;
4616
4617 /* Don't propagate .opd relocs. */
4618 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4619 break;
4620
4621 /* If we are creating a shared library, and this is a reloc
4622 against a global symbol, or a non PC relative reloc
4623 against a local symbol, then we need to copy the reloc
4624 into the shared library. However, if we are linking with
4625 -Bsymbolic, we do not need to copy a reloc against a
4626 global symbol which is defined in an object we are
4627 including in the link (i.e., DEF_REGULAR is set). At
4628 this point we have not seen all the input files, so it is
4629 possible that DEF_REGULAR is not set now but will be set
4630 later (it is never cleared). In case of a weak definition,
4631 DEF_REGULAR may be cleared later by a strong definition in
4632 a shared library. We account for that possibility below by
4633 storing information in the dyn_relocs field of the hash
4634 table entry. A similar situation occurs when creating
4635 shared libraries and symbol visibility changes render the
4636 symbol local.
4637
4638 If on the other hand, we are creating an executable, we
4639 may need to keep relocations for symbols satisfied by a
4640 dynamic library if we manage to avoid copy relocs for the
4641 symbol. */
4642 dodyn:
4643 if ((info->shared
4644 && (MUST_BE_DYN_RELOC (r_type)
4645 || (h != NULL
4646 && (! info->symbolic
4647 || h->root.type == bfd_link_hash_defweak
4648 || !h->def_regular))))
4649 || (ELIMINATE_COPY_RELOCS
4650 && !info->shared
4651 && h != NULL
4652 && (h->root.type == bfd_link_hash_defweak
4653 || !h->def_regular)))
4654 {
4655 struct ppc_dyn_relocs *p;
4656 struct ppc_dyn_relocs **head;
4657
4658 /* We must copy these reloc types into the output file.
4659 Create a reloc section in dynobj and make room for
4660 this reloc. */
4661 if (sreloc == NULL)
4662 {
4663 const char *name;
4664 bfd *dynobj;
4665
4666 name = (bfd_elf_string_from_elf_section
4667 (abfd,
4668 elf_elfheader (abfd)->e_shstrndx,
4669 elf_section_data (sec)->rel_hdr.sh_name));
4670 if (name == NULL)
4671 return FALSE;
4672
4673 if (strncmp (name, ".rela", 5) != 0
4674 || strcmp (bfd_get_section_name (abfd, sec),
4675 name + 5) != 0)
4676 {
4677 (*_bfd_error_handler)
4678 (_("%B: bad relocation section name `%s\'"),
4679 abfd, name);
4680 bfd_set_error (bfd_error_bad_value);
4681 }
4682
4683 dynobj = htab->elf.dynobj;
4684 sreloc = bfd_get_section_by_name (dynobj, name);
4685 if (sreloc == NULL)
4686 {
4687 flagword flags;
4688
4689 sreloc = bfd_make_section (dynobj, name);
4690 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4691 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4692 if ((sec->flags & SEC_ALLOC) != 0)
4693 flags |= SEC_ALLOC | SEC_LOAD;
4694 if (sreloc == NULL
4695 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4696 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4697 return FALSE;
4698 }
4699 elf_section_data (sec)->sreloc = sreloc;
4700 }
4701
4702 /* If this is a global symbol, we count the number of
4703 relocations we need for this symbol. */
4704 if (h != NULL)
4705 {
4706 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4707 }
4708 else
4709 {
4710 /* Track dynamic relocs needed for local syms too.
4711 We really need local syms available to do this
4712 easily. Oh well. */
4713
4714 asection *s;
4715 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4716 sec, r_symndx);
4717 if (s == NULL)
4718 return FALSE;
4719
4720 head = ((struct ppc_dyn_relocs **)
4721 &elf_section_data (s)->local_dynrel);
4722 }
4723
4724 p = *head;
4725 if (p == NULL || p->sec != sec)
4726 {
4727 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4728 if (p == NULL)
4729 return FALSE;
4730 p->next = *head;
4731 *head = p;
4732 p->sec = sec;
4733 p->count = 0;
4734 p->pc_count = 0;
4735 }
4736
4737 p->count += 1;
4738 if (!MUST_BE_DYN_RELOC (r_type))
4739 p->pc_count += 1;
4740 }
4741 break;
4742
4743 default:
4744 break;
4745 }
4746 }
4747
4748 return TRUE;
4749 }
4750
4751 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4752 of the code entry point, and its section. */
4753
4754 static bfd_vma
4755 opd_entry_value (asection *opd_sec,
4756 bfd_vma offset,
4757 asection **code_sec,
4758 bfd_vma *code_off)
4759 {
4760 bfd *opd_bfd = opd_sec->owner;
4761 Elf_Internal_Rela *relocs;
4762 Elf_Internal_Rela *lo, *hi, *look;
4763 bfd_vma val;
4764
4765 /* No relocs implies we are linking a --just-symbols object. */
4766 if (opd_sec->reloc_count == 0)
4767 {
4768 bfd_vma val;
4769
4770 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4771 return (bfd_vma) -1;
4772
4773 if (code_sec != NULL)
4774 {
4775 asection *sec, *likely = NULL;
4776 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4777 if (sec->vma <= val
4778 && (sec->flags & SEC_LOAD) != 0
4779 && (sec->flags & SEC_ALLOC) != 0)
4780 likely = sec;
4781 if (likely != NULL)
4782 {
4783 *code_sec = likely;
4784 if (code_off != NULL)
4785 *code_off = val - likely->vma;
4786 }
4787 }
4788 return val;
4789 }
4790
4791 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4792 if (relocs == NULL)
4793 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4794
4795 /* Go find the opd reloc at the sym address. */
4796 lo = relocs;
4797 BFD_ASSERT (lo != NULL);
4798 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4799 val = (bfd_vma) -1;
4800 while (lo < hi)
4801 {
4802 look = lo + (hi - lo) / 2;
4803 if (look->r_offset < offset)
4804 lo = look + 1;
4805 else if (look->r_offset > offset)
4806 hi = look;
4807 else
4808 {
4809 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4810 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4811 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4812 {
4813 unsigned long symndx = ELF64_R_SYM (look->r_info);
4814 asection *sec;
4815
4816 if (symndx < symtab_hdr->sh_info)
4817 {
4818 Elf_Internal_Sym *sym;
4819
4820 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4821 if (sym == NULL)
4822 {
4823 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4824 symtab_hdr->sh_info,
4825 0, NULL, NULL, NULL);
4826 if (sym == NULL)
4827 break;
4828 symtab_hdr->contents = (bfd_byte *) sym;
4829 }
4830
4831 sym += symndx;
4832 val = sym->st_value;
4833 sec = NULL;
4834 if ((sym->st_shndx != SHN_UNDEF
4835 && sym->st_shndx < SHN_LORESERVE)
4836 || sym->st_shndx > SHN_HIRESERVE)
4837 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4838 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4839 }
4840 else
4841 {
4842 struct elf_link_hash_entry **sym_hashes;
4843 struct elf_link_hash_entry *rh;
4844
4845 sym_hashes = elf_sym_hashes (opd_bfd);
4846 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4847 while (rh->root.type == bfd_link_hash_indirect
4848 || rh->root.type == bfd_link_hash_warning)
4849 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4850 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4851 || rh->root.type == bfd_link_hash_defweak);
4852 val = rh->root.u.def.value;
4853 sec = rh->root.u.def.section;
4854 }
4855 val += look->r_addend;
4856 if (code_off != NULL)
4857 *code_off = val;
4858 if (code_sec != NULL)
4859 *code_sec = sec;
4860 if (sec != NULL && sec->output_section != NULL)
4861 val += sec->output_section->vma + sec->output_offset;
4862 }
4863 break;
4864 }
4865 }
4866
4867 return val;
4868 }
4869
4870 /* Return the section that should be marked against GC for a given
4871 relocation. */
4872
4873 static asection *
4874 ppc64_elf_gc_mark_hook (asection *sec,
4875 struct bfd_link_info *info,
4876 Elf_Internal_Rela *rel,
4877 struct elf_link_hash_entry *h,
4878 Elf_Internal_Sym *sym)
4879 {
4880 asection *rsec;
4881
4882 /* First mark all our entry sym sections. */
4883 if (info->gc_sym_list != NULL)
4884 {
4885 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4886 struct bfd_sym_chain *sym = info->gc_sym_list;
4887
4888 info->gc_sym_list = NULL;
4889 do
4890 {
4891 struct ppc_link_hash_entry *eh;
4892
4893 eh = (struct ppc_link_hash_entry *)
4894 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4895 if (eh == NULL)
4896 continue;
4897 if (eh->elf.root.type != bfd_link_hash_defined
4898 && eh->elf.root.type != bfd_link_hash_defweak)
4899 continue;
4900
4901 if (eh->is_func_descriptor
4902 && (eh->oh->elf.root.type == bfd_link_hash_defined
4903 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4904 rsec = eh->oh->elf.root.u.def.section;
4905 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4906 && opd_entry_value (eh->elf.root.u.def.section,
4907 eh->elf.root.u.def.value,
4908 &rsec, NULL) != (bfd_vma) -1)
4909 ;
4910 else
4911 continue;
4912
4913 if (!rsec->gc_mark)
4914 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4915
4916 rsec = eh->elf.root.u.def.section;
4917 if (!rsec->gc_mark)
4918 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4919
4920 sym = sym->next;
4921 }
4922 while (sym != NULL);
4923 }
4924
4925 /* Syms return NULL if we're marking .opd, so we avoid marking all
4926 function sections, as all functions are referenced in .opd. */
4927 rsec = NULL;
4928 if (get_opd_info (sec) != NULL)
4929 return rsec;
4930
4931 if (h != NULL)
4932 {
4933 enum elf_ppc64_reloc_type r_type;
4934 struct ppc_link_hash_entry *eh;
4935
4936 r_type = ELF64_R_TYPE (rel->r_info);
4937 switch (r_type)
4938 {
4939 case R_PPC64_GNU_VTINHERIT:
4940 case R_PPC64_GNU_VTENTRY:
4941 break;
4942
4943 default:
4944 switch (h->root.type)
4945 {
4946 case bfd_link_hash_defined:
4947 case bfd_link_hash_defweak:
4948 eh = (struct ppc_link_hash_entry *) h;
4949 if (eh->oh != NULL
4950 && eh->oh->is_func_descriptor
4951 && (eh->oh->elf.root.type == bfd_link_hash_defined
4952 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4953 eh = eh->oh;
4954
4955 /* Function descriptor syms cause the associated
4956 function code sym section to be marked. */
4957 if (eh->is_func_descriptor
4958 && (eh->oh->elf.root.type == bfd_link_hash_defined
4959 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4960 {
4961 /* They also mark their opd section. */
4962 if (!eh->elf.root.u.def.section->gc_mark)
4963 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4964 ppc64_elf_gc_mark_hook);
4965
4966 rsec = eh->oh->elf.root.u.def.section;
4967 }
4968 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4969 && opd_entry_value (eh->elf.root.u.def.section,
4970 eh->elf.root.u.def.value,
4971 &rsec, NULL) != (bfd_vma) -1)
4972 {
4973 if (!eh->elf.root.u.def.section->gc_mark)
4974 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4975 ppc64_elf_gc_mark_hook);
4976 }
4977 else
4978 rsec = h->root.u.def.section;
4979 break;
4980
4981 case bfd_link_hash_common:
4982 rsec = h->root.u.c.p->section;
4983 break;
4984
4985 default:
4986 break;
4987 }
4988 }
4989 }
4990 else
4991 {
4992 asection **opd_sym_section;
4993
4994 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4995 opd_sym_section = get_opd_info (rsec);
4996 if (opd_sym_section != NULL)
4997 {
4998 if (!rsec->gc_mark)
4999 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5000
5001 rsec = opd_sym_section[sym->st_value / 8];
5002 }
5003 }
5004
5005 return rsec;
5006 }
5007
5008 /* Update the .got, .plt. and dynamic reloc reference counts for the
5009 section being removed. */
5010
5011 static bfd_boolean
5012 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5013 asection *sec, const Elf_Internal_Rela *relocs)
5014 {
5015 struct ppc_link_hash_table *htab;
5016 Elf_Internal_Shdr *symtab_hdr;
5017 struct elf_link_hash_entry **sym_hashes;
5018 struct got_entry **local_got_ents;
5019 const Elf_Internal_Rela *rel, *relend;
5020
5021 if ((sec->flags & SEC_ALLOC) == 0)
5022 return TRUE;
5023
5024 elf_section_data (sec)->local_dynrel = NULL;
5025
5026 htab = ppc_hash_table (info);
5027 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5028 sym_hashes = elf_sym_hashes (abfd);
5029 local_got_ents = elf_local_got_ents (abfd);
5030
5031 relend = relocs + sec->reloc_count;
5032 for (rel = relocs; rel < relend; rel++)
5033 {
5034 unsigned long r_symndx;
5035 enum elf_ppc64_reloc_type r_type;
5036 struct elf_link_hash_entry *h = NULL;
5037 char tls_type = 0;
5038
5039 r_symndx = ELF64_R_SYM (rel->r_info);
5040 r_type = ELF64_R_TYPE (rel->r_info);
5041 if (r_symndx >= symtab_hdr->sh_info)
5042 {
5043 struct ppc_link_hash_entry *eh;
5044 struct ppc_dyn_relocs **pp;
5045 struct ppc_dyn_relocs *p;
5046
5047 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5048 while (h->root.type == bfd_link_hash_indirect
5049 || h->root.type == bfd_link_hash_warning)
5050 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5051 eh = (struct ppc_link_hash_entry *) h;
5052
5053 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5054 if (p->sec == sec)
5055 {
5056 /* Everything must go for SEC. */
5057 *pp = p->next;
5058 break;
5059 }
5060 }
5061
5062 switch (r_type)
5063 {
5064 case R_PPC64_GOT_TLSLD16:
5065 case R_PPC64_GOT_TLSLD16_LO:
5066 case R_PPC64_GOT_TLSLD16_HI:
5067 case R_PPC64_GOT_TLSLD16_HA:
5068 ppc64_tlsld_got (abfd)->refcount -= 1;
5069 tls_type = TLS_TLS | TLS_LD;
5070 goto dogot;
5071
5072 case R_PPC64_GOT_TLSGD16:
5073 case R_PPC64_GOT_TLSGD16_LO:
5074 case R_PPC64_GOT_TLSGD16_HI:
5075 case R_PPC64_GOT_TLSGD16_HA:
5076 tls_type = TLS_TLS | TLS_GD;
5077 goto dogot;
5078
5079 case R_PPC64_GOT_TPREL16_DS:
5080 case R_PPC64_GOT_TPREL16_LO_DS:
5081 case R_PPC64_GOT_TPREL16_HI:
5082 case R_PPC64_GOT_TPREL16_HA:
5083 tls_type = TLS_TLS | TLS_TPREL;
5084 goto dogot;
5085
5086 case R_PPC64_GOT_DTPREL16_DS:
5087 case R_PPC64_GOT_DTPREL16_LO_DS:
5088 case R_PPC64_GOT_DTPREL16_HI:
5089 case R_PPC64_GOT_DTPREL16_HA:
5090 tls_type = TLS_TLS | TLS_DTPREL;
5091 goto dogot;
5092
5093 case R_PPC64_GOT16:
5094 case R_PPC64_GOT16_DS:
5095 case R_PPC64_GOT16_HA:
5096 case R_PPC64_GOT16_HI:
5097 case R_PPC64_GOT16_LO:
5098 case R_PPC64_GOT16_LO_DS:
5099 dogot:
5100 {
5101 struct got_entry *ent;
5102
5103 if (h != NULL)
5104 ent = h->got.glist;
5105 else
5106 ent = local_got_ents[r_symndx];
5107
5108 for (; ent != NULL; ent = ent->next)
5109 if (ent->addend == rel->r_addend
5110 && ent->owner == abfd
5111 && ent->tls_type == tls_type)
5112 break;
5113 if (ent == NULL)
5114 abort ();
5115 if (ent->got.refcount > 0)
5116 ent->got.refcount -= 1;
5117 }
5118 break;
5119
5120 case R_PPC64_PLT16_HA:
5121 case R_PPC64_PLT16_HI:
5122 case R_PPC64_PLT16_LO:
5123 case R_PPC64_PLT32:
5124 case R_PPC64_PLT64:
5125 case R_PPC64_REL14:
5126 case R_PPC64_REL14_BRNTAKEN:
5127 case R_PPC64_REL14_BRTAKEN:
5128 case R_PPC64_REL24:
5129 if (h != NULL)
5130 {
5131 struct plt_entry *ent;
5132
5133 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5134 if (ent->addend == rel->r_addend)
5135 break;
5136 if (ent == NULL)
5137 abort ();
5138 if (ent->plt.refcount > 0)
5139 ent->plt.refcount -= 1;
5140 }
5141 break;
5142
5143 default:
5144 break;
5145 }
5146 }
5147 return TRUE;
5148 }
5149
5150 /* The maximum size of .sfpr. */
5151 #define SFPR_MAX (218*4)
5152
5153 struct sfpr_def_parms
5154 {
5155 const char name[12];
5156 unsigned char lo, hi;
5157 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5158 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5159 };
5160
5161 /* Auto-generate _save*, _rest* functions in .sfpr. */
5162
5163 static unsigned int
5164 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5165 {
5166 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5167 unsigned int i;
5168 size_t len = strlen (parm->name);
5169 bfd_boolean writing = FALSE;
5170 char sym[16];
5171
5172 memcpy (sym, parm->name, len);
5173 sym[len + 2] = 0;
5174
5175 for (i = parm->lo; i <= parm->hi; i++)
5176 {
5177 struct elf_link_hash_entry *h;
5178
5179 sym[len + 0] = i / 10 + '0';
5180 sym[len + 1] = i % 10 + '0';
5181 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5182 if (h != NULL
5183 && !h->def_regular)
5184 {
5185 h->root.type = bfd_link_hash_defined;
5186 h->root.u.def.section = htab->sfpr;
5187 h->root.u.def.value = htab->sfpr->size;
5188 h->type = STT_FUNC;
5189 h->def_regular = 1;
5190 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5191 writing = TRUE;
5192 if (htab->sfpr->contents == NULL)
5193 {
5194 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5195 if (htab->sfpr->contents == NULL)
5196 return FALSE;
5197 }
5198 }
5199 if (writing)
5200 {
5201 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5202 if (i != parm->hi)
5203 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5204 else
5205 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5206 htab->sfpr->size = p - htab->sfpr->contents;
5207 }
5208 }
5209
5210 return TRUE;
5211 }
5212
5213 static bfd_byte *
5214 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5215 {
5216 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5217 return p + 4;
5218 }
5219
5220 static bfd_byte *
5221 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5222 {
5223 p = savegpr0 (abfd, p, r);
5224 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5225 p = p + 4;
5226 bfd_put_32 (abfd, BLR, p);
5227 return p + 4;
5228 }
5229
5230 static bfd_byte *
5231 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5232 {
5233 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5234 return p + 4;
5235 }
5236
5237 static bfd_byte *
5238 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5239 {
5240 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5241 p = p + 4;
5242 p = restgpr0 (abfd, p, r);
5243 bfd_put_32 (abfd, MTLR_R0, p);
5244 p = p + 4;
5245 if (r == 29)
5246 {
5247 p = restgpr0 (abfd, p, 30);
5248 p = restgpr0 (abfd, p, 31);
5249 }
5250 bfd_put_32 (abfd, BLR, p);
5251 return p + 4;
5252 }
5253
5254 static bfd_byte *
5255 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5256 {
5257 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5258 return p + 4;
5259 }
5260
5261 static bfd_byte *
5262 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5263 {
5264 p = savegpr1 (abfd, p, r);
5265 bfd_put_32 (abfd, BLR, p);
5266 return p + 4;
5267 }
5268
5269 static bfd_byte *
5270 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5271 {
5272 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5273 return p + 4;
5274 }
5275
5276 static bfd_byte *
5277 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5278 {
5279 p = restgpr1 (abfd, p, r);
5280 bfd_put_32 (abfd, BLR, p);
5281 return p + 4;
5282 }
5283
5284 static bfd_byte *
5285 savefpr (bfd *abfd, bfd_byte *p, int r)
5286 {
5287 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5288 return p + 4;
5289 }
5290
5291 static bfd_byte *
5292 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5293 {
5294 p = savefpr (abfd, p, r);
5295 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5296 p = p + 4;
5297 bfd_put_32 (abfd, BLR, p);
5298 return p + 4;
5299 }
5300
5301 static bfd_byte *
5302 restfpr (bfd *abfd, bfd_byte *p, int r)
5303 {
5304 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5305 return p + 4;
5306 }
5307
5308 static bfd_byte *
5309 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5310 {
5311 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5312 p = p + 4;
5313 p = restfpr (abfd, p, r);
5314 bfd_put_32 (abfd, MTLR_R0, p);
5315 p = p + 4;
5316 if (r == 29)
5317 {
5318 p = restfpr (abfd, p, 30);
5319 p = restfpr (abfd, p, 31);
5320 }
5321 bfd_put_32 (abfd, BLR, p);
5322 return p + 4;
5323 }
5324
5325 static bfd_byte *
5326 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5327 {
5328 p = savefpr (abfd, p, r);
5329 bfd_put_32 (abfd, BLR, p);
5330 return p + 4;
5331 }
5332
5333 static bfd_byte *
5334 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5335 {
5336 p = restfpr (abfd, p, r);
5337 bfd_put_32 (abfd, BLR, p);
5338 return p + 4;
5339 }
5340
5341 static bfd_byte *
5342 savevr (bfd *abfd, bfd_byte *p, int r)
5343 {
5344 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5345 p = p + 4;
5346 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5347 return p + 4;
5348 }
5349
5350 static bfd_byte *
5351 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5352 {
5353 p = savevr (abfd, p, r);
5354 bfd_put_32 (abfd, BLR, p);
5355 return p + 4;
5356 }
5357
5358 static bfd_byte *
5359 restvr (bfd *abfd, bfd_byte *p, int r)
5360 {
5361 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5362 p = p + 4;
5363 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5364 return p + 4;
5365 }
5366
5367 static bfd_byte *
5368 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5369 {
5370 p = restvr (abfd, p, r);
5371 bfd_put_32 (abfd, BLR, p);
5372 return p + 4;
5373 }
5374
5375 /* Called via elf_link_hash_traverse to transfer dynamic linking
5376 information on function code symbol entries to their corresponding
5377 function descriptor symbol entries. */
5378
5379 static bfd_boolean
5380 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5381 {
5382 struct bfd_link_info *info;
5383 struct ppc_link_hash_table *htab;
5384 struct plt_entry *ent;
5385 struct ppc_link_hash_entry *fh;
5386 struct ppc_link_hash_entry *fdh;
5387 bfd_boolean force_local;
5388
5389 fh = (struct ppc_link_hash_entry *) h;
5390 if (fh->elf.root.type == bfd_link_hash_indirect)
5391 return TRUE;
5392
5393 if (fh->elf.root.type == bfd_link_hash_warning)
5394 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5395
5396 info = inf;
5397 htab = ppc_hash_table (info);
5398
5399 /* Resolve undefined references to dot-symbols as the value
5400 in the function descriptor, if we have one in a regular object.
5401 This is to satisfy cases like ".quad .foo". Calls to functions
5402 in dynamic objects are handled elsewhere. */
5403 if (fh->elf.root.type == bfd_link_hash_undefweak
5404 && fh->was_undefined
5405 && (fh->oh->elf.root.type == bfd_link_hash_defined
5406 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5407 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5408 && opd_entry_value (fh->oh->elf.root.u.def.section,
5409 fh->oh->elf.root.u.def.value,
5410 &fh->elf.root.u.def.section,
5411 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5412 {
5413 fh->elf.root.type = fh->oh->elf.root.type;
5414 fh->elf.forced_local = 1;
5415 }
5416
5417 /* If this is a function code symbol, transfer dynamic linking
5418 information to the function descriptor symbol. */
5419 if (!fh->is_func)
5420 return TRUE;
5421
5422 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5423 if (ent->plt.refcount > 0)
5424 break;
5425 if (ent == NULL
5426 || fh->elf.root.root.string[0] != '.'
5427 || fh->elf.root.root.string[1] == '\0')
5428 return TRUE;
5429
5430 /* Find the corresponding function descriptor symbol. Create it
5431 as undefined if necessary. */
5432
5433 fdh = get_fdh (fh, htab);
5434 if (fdh != NULL)
5435 while (fdh->elf.root.type == bfd_link_hash_indirect
5436 || fdh->elf.root.type == bfd_link_hash_warning)
5437 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5438
5439 if (fdh == NULL
5440 && info->shared
5441 && (fh->elf.root.type == bfd_link_hash_undefined
5442 || fh->elf.root.type == bfd_link_hash_undefweak))
5443 {
5444 fdh = make_fdh (info, fh);
5445 if (fdh == NULL)
5446 return FALSE;
5447 }
5448
5449 /* Fake function descriptors are made undefweak. If the function
5450 code symbol is strong undefined, make the fake sym the same. */
5451
5452 if (fdh != NULL
5453 && fdh->fake
5454 && fdh->elf.root.type == bfd_link_hash_undefweak
5455 && fh->elf.root.type == bfd_link_hash_undefined)
5456 {
5457 fdh->elf.root.type = bfd_link_hash_undefined;
5458 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5459 }
5460
5461 if (fdh != NULL
5462 && !fdh->elf.forced_local
5463 && (info->shared
5464 || fdh->elf.def_dynamic
5465 || fdh->elf.ref_dynamic
5466 || (fdh->elf.root.type == bfd_link_hash_undefweak
5467 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5468 {
5469 if (fdh->elf.dynindx == -1)
5470 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5471 return FALSE;
5472 fdh->elf.ref_regular |= fh->elf.ref_regular;
5473 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5474 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5475 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5476 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5477 {
5478 move_plt_plist (fh, fdh);
5479 fdh->elf.needs_plt = 1;
5480 }
5481 fdh->is_func_descriptor = 1;
5482 fdh->oh = fh;
5483 fh->oh = fdh;
5484 }
5485
5486 /* Now that the info is on the function descriptor, clear the
5487 function code sym info. Any function code syms for which we
5488 don't have a definition in a regular file, we force local.
5489 This prevents a shared library from exporting syms that have
5490 been imported from another library. Function code syms that
5491 are really in the library we must leave global to prevent the
5492 linker dragging in a definition from a static library. */
5493 force_local = (!fh->elf.def_regular
5494 || fdh == NULL
5495 || !fdh->elf.def_regular
5496 || fdh->elf.forced_local);
5497 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5498
5499 return TRUE;
5500 }
5501
5502 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5503 this hook to a) provide some gcc support functions, and b) transfer
5504 dynamic linking information gathered so far on function code symbol
5505 entries, to their corresponding function descriptor symbol entries. */
5506
5507 static bfd_boolean
5508 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5509 struct bfd_link_info *info)
5510 {
5511 struct ppc_link_hash_table *htab;
5512 unsigned int i;
5513 const struct sfpr_def_parms funcs[] =
5514 {
5515 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5516 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5517 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5518 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5519 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5520 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5521 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5522 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5523 { "._savef", 14, 31, savefpr, savefpr1_tail },
5524 { "._restf", 14, 31, restfpr, restfpr1_tail },
5525 { "_savevr_", 20, 31, savevr, savevr_tail },
5526 { "_restvr_", 20, 31, restvr, restvr_tail }
5527 };
5528
5529 htab = ppc_hash_table (info);
5530 if (htab->sfpr == NULL)
5531 /* We don't have any relocs. */
5532 return TRUE;
5533
5534 /* Provide any missing _save* and _rest* functions. */
5535 htab->sfpr->size = 0;
5536 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5537 if (!sfpr_define (info, &funcs[i]))
5538 return FALSE;
5539
5540 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5541
5542 if (htab->sfpr->size == 0)
5543 _bfd_strip_section_from_output (info, htab->sfpr);
5544
5545 return TRUE;
5546 }
5547
5548 /* Adjust a symbol defined by a dynamic object and referenced by a
5549 regular object. The current definition is in some section of the
5550 dynamic object, but we're not including those sections. We have to
5551 change the definition to something the rest of the link can
5552 understand. */
5553
5554 static bfd_boolean
5555 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5556 struct elf_link_hash_entry *h)
5557 {
5558 struct ppc_link_hash_table *htab;
5559 asection *s;
5560 unsigned int power_of_two;
5561
5562 htab = ppc_hash_table (info);
5563
5564 /* Deal with function syms. */
5565 if (h->type == STT_FUNC
5566 || h->needs_plt)
5567 {
5568 /* Clear procedure linkage table information for any symbol that
5569 won't need a .plt entry. */
5570 struct plt_entry *ent;
5571 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5572 if (ent->plt.refcount > 0)
5573 break;
5574 if (ent == NULL
5575 || SYMBOL_CALLS_LOCAL (info, h)
5576 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5577 && h->root.type == bfd_link_hash_undefweak))
5578 {
5579 h->plt.plist = NULL;
5580 h->needs_plt = 0;
5581 }
5582 }
5583 else
5584 h->plt.plist = NULL;
5585
5586 /* If this is a weak symbol, and there is a real definition, the
5587 processor independent code will have arranged for us to see the
5588 real definition first, and we can just use the same value. */
5589 if (h->u.weakdef != NULL)
5590 {
5591 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5592 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5593 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5594 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5595 if (ELIMINATE_COPY_RELOCS)
5596 h->non_got_ref = h->u.weakdef->non_got_ref;
5597 return TRUE;
5598 }
5599
5600 /* If we are creating a shared library, we must presume that the
5601 only references to the symbol are via the global offset table.
5602 For such cases we need not do anything here; the relocations will
5603 be handled correctly by relocate_section. */
5604 if (info->shared)
5605 return TRUE;
5606
5607 /* If there are no references to this symbol that do not use the
5608 GOT, we don't need to generate a copy reloc. */
5609 if (!h->non_got_ref)
5610 return TRUE;
5611
5612 if (ELIMINATE_COPY_RELOCS)
5613 {
5614 struct ppc_link_hash_entry * eh;
5615 struct ppc_dyn_relocs *p;
5616
5617 eh = (struct ppc_link_hash_entry *) h;
5618 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5619 {
5620 s = p->sec->output_section;
5621 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5622 break;
5623 }
5624
5625 /* If we didn't find any dynamic relocs in read-only sections, then
5626 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5627 if (p == NULL)
5628 {
5629 h->non_got_ref = 0;
5630 return TRUE;
5631 }
5632 }
5633
5634 if (h->plt.plist != NULL)
5635 {
5636 /* We should never get here, but unfortunately there are versions
5637 of gcc out there that improperly (for this ABI) put initialized
5638 function pointers, vtable refs and suchlike in read-only
5639 sections. Allow them to proceed, but warn that this might
5640 break at runtime. */
5641 (*_bfd_error_handler)
5642 (_("copy reloc against `%s' requires lazy plt linking; "
5643 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5644 h->root.root.string);
5645 }
5646
5647 /* This is a reference to a symbol defined by a dynamic object which
5648 is not a function. */
5649
5650 /* We must allocate the symbol in our .dynbss section, which will
5651 become part of the .bss section of the executable. There will be
5652 an entry for this symbol in the .dynsym section. The dynamic
5653 object will contain position independent code, so all references
5654 from the dynamic object to this symbol will go through the global
5655 offset table. The dynamic linker will use the .dynsym entry to
5656 determine the address it must put in the global offset table, so
5657 both the dynamic object and the regular object will refer to the
5658 same memory location for the variable. */
5659
5660 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5661 to copy the initial value out of the dynamic object and into the
5662 runtime process image. We need to remember the offset into the
5663 .rela.bss section we are going to use. */
5664 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5665 {
5666 htab->relbss->size += sizeof (Elf64_External_Rela);
5667 h->needs_copy = 1;
5668 }
5669
5670 /* We need to figure out the alignment required for this symbol. I
5671 have no idea how ELF linkers handle this. */
5672 power_of_two = bfd_log2 (h->size);
5673 if (power_of_two > 4)
5674 power_of_two = 4;
5675
5676 /* Apply the required alignment. */
5677 s = htab->dynbss;
5678 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5679 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5680 {
5681 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5682 return FALSE;
5683 }
5684
5685 /* Define the symbol as being at this point in the section. */
5686 h->root.u.def.section = s;
5687 h->root.u.def.value = s->size;
5688
5689 /* Increment the section size to make room for the symbol. */
5690 s->size += h->size;
5691
5692 return TRUE;
5693 }
5694
5695 /* If given a function descriptor symbol, hide both the function code
5696 sym and the descriptor. */
5697 static void
5698 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5699 struct elf_link_hash_entry *h,
5700 bfd_boolean force_local)
5701 {
5702 struct ppc_link_hash_entry *eh;
5703 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5704
5705 eh = (struct ppc_link_hash_entry *) h;
5706 if (eh->is_func_descriptor)
5707 {
5708 struct ppc_link_hash_entry *fh = eh->oh;
5709
5710 if (fh == NULL)
5711 {
5712 const char *p, *q;
5713 struct ppc_link_hash_table *htab;
5714 char save;
5715
5716 /* We aren't supposed to use alloca in BFD because on
5717 systems which do not have alloca the version in libiberty
5718 calls xmalloc, which might cause the program to crash
5719 when it runs out of memory. This function doesn't have a
5720 return status, so there's no way to gracefully return an
5721 error. So cheat. We know that string[-1] can be safely
5722 accessed; It's either a string in an ELF string table,
5723 or allocated in an objalloc structure. */
5724
5725 p = eh->elf.root.root.string - 1;
5726 save = *p;
5727 *(char *) p = '.';
5728 htab = ppc_hash_table (info);
5729 fh = (struct ppc_link_hash_entry *)
5730 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5731 *(char *) p = save;
5732
5733 /* Unfortunately, if it so happens that the string we were
5734 looking for was allocated immediately before this string,
5735 then we overwrote the string terminator. That's the only
5736 reason the lookup should fail. */
5737 if (fh == NULL)
5738 {
5739 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5740 while (q >= eh->elf.root.root.string && *q == *p)
5741 --q, --p;
5742 if (q < eh->elf.root.root.string && *p == '.')
5743 fh = (struct ppc_link_hash_entry *)
5744 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5745 }
5746 if (fh != NULL)
5747 {
5748 eh->oh = fh;
5749 fh->oh = eh;
5750 }
5751 }
5752 if (fh != NULL)
5753 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5754 }
5755 }
5756
5757 static bfd_boolean
5758 get_sym_h (struct elf_link_hash_entry **hp,
5759 Elf_Internal_Sym **symp,
5760 asection **symsecp,
5761 char **tls_maskp,
5762 Elf_Internal_Sym **locsymsp,
5763 unsigned long r_symndx,
5764 bfd *ibfd)
5765 {
5766 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5767
5768 if (r_symndx >= symtab_hdr->sh_info)
5769 {
5770 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5771 struct elf_link_hash_entry *h;
5772
5773 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5774 while (h->root.type == bfd_link_hash_indirect
5775 || h->root.type == bfd_link_hash_warning)
5776 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5777
5778 if (hp != NULL)
5779 *hp = h;
5780
5781 if (symp != NULL)
5782 *symp = NULL;
5783
5784 if (symsecp != NULL)
5785 {
5786 asection *symsec = NULL;
5787 if (h->root.type == bfd_link_hash_defined
5788 || h->root.type == bfd_link_hash_defweak)
5789 symsec = h->root.u.def.section;
5790 *symsecp = symsec;
5791 }
5792
5793 if (tls_maskp != NULL)
5794 {
5795 struct ppc_link_hash_entry *eh;
5796
5797 eh = (struct ppc_link_hash_entry *) h;
5798 *tls_maskp = &eh->tls_mask;
5799 }
5800 }
5801 else
5802 {
5803 Elf_Internal_Sym *sym;
5804 Elf_Internal_Sym *locsyms = *locsymsp;
5805
5806 if (locsyms == NULL)
5807 {
5808 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5809 if (locsyms == NULL)
5810 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5811 symtab_hdr->sh_info,
5812 0, NULL, NULL, NULL);
5813 if (locsyms == NULL)
5814 return FALSE;
5815 *locsymsp = locsyms;
5816 }
5817 sym = locsyms + r_symndx;
5818
5819 if (hp != NULL)
5820 *hp = NULL;
5821
5822 if (symp != NULL)
5823 *symp = sym;
5824
5825 if (symsecp != NULL)
5826 {
5827 asection *symsec = NULL;
5828 if ((sym->st_shndx != SHN_UNDEF
5829 && sym->st_shndx < SHN_LORESERVE)
5830 || sym->st_shndx > SHN_HIRESERVE)
5831 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5832 *symsecp = symsec;
5833 }
5834
5835 if (tls_maskp != NULL)
5836 {
5837 struct got_entry **lgot_ents;
5838 char *tls_mask;
5839
5840 tls_mask = NULL;
5841 lgot_ents = elf_local_got_ents (ibfd);
5842 if (lgot_ents != NULL)
5843 {
5844 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5845 tls_mask = &lgot_masks[r_symndx];
5846 }
5847 *tls_maskp = tls_mask;
5848 }
5849 }
5850 return TRUE;
5851 }
5852
5853 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5854 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5855 type suitable for optimization, and 1 otherwise. */
5856
5857 static int
5858 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5859 Elf_Internal_Sym **locsymsp,
5860 const Elf_Internal_Rela *rel, bfd *ibfd)
5861 {
5862 unsigned long r_symndx;
5863 int next_r;
5864 struct elf_link_hash_entry *h;
5865 Elf_Internal_Sym *sym;
5866 asection *sec;
5867 bfd_vma off;
5868
5869 r_symndx = ELF64_R_SYM (rel->r_info);
5870 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5871 return 0;
5872
5873 if ((*tls_maskp != NULL && **tls_maskp != 0)
5874 || sec == NULL
5875 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5876 return 1;
5877
5878 /* Look inside a TOC section too. */
5879 if (h != NULL)
5880 {
5881 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5882 off = h->root.u.def.value;
5883 }
5884 else
5885 off = sym->st_value;
5886 off += rel->r_addend;
5887 BFD_ASSERT (off % 8 == 0);
5888 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5889 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5890 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5891 return 0;
5892 if (toc_symndx != NULL)
5893 *toc_symndx = r_symndx;
5894 if ((h == NULL
5895 || ((h->root.type == bfd_link_hash_defined
5896 || h->root.type == bfd_link_hash_defweak)
5897 && !h->def_dynamic))
5898 && (next_r == -1 || next_r == -2))
5899 return 1 - next_r;
5900 return 1;
5901 }
5902
5903 /* Adjust all global syms defined in opd sections. In gcc generated
5904 code for the old ABI, these will already have been done. */
5905
5906 static bfd_boolean
5907 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5908 {
5909 struct ppc_link_hash_entry *eh;
5910 asection *sym_sec;
5911 long *opd_adjust;
5912
5913 if (h->root.type == bfd_link_hash_indirect)
5914 return TRUE;
5915
5916 if (h->root.type == bfd_link_hash_warning)
5917 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5918
5919 if (h->root.type != bfd_link_hash_defined
5920 && h->root.type != bfd_link_hash_defweak)
5921 return TRUE;
5922
5923 eh = (struct ppc_link_hash_entry *) h;
5924 if (eh->adjust_done)
5925 return TRUE;
5926
5927 sym_sec = eh->elf.root.u.def.section;
5928 opd_adjust = get_opd_info (sym_sec);
5929 if (opd_adjust != NULL)
5930 {
5931 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5932 if (adjust == -1)
5933 {
5934 /* This entry has been deleted. */
5935 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5936 if (dsec == NULL)
5937 {
5938 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5939 if (elf_discarded_section (dsec))
5940 {
5941 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5942 break;
5943 }
5944 }
5945 eh->elf.root.u.def.value = 0;
5946 eh->elf.root.u.def.section = dsec;
5947 }
5948 else
5949 eh->elf.root.u.def.value += adjust;
5950 eh->adjust_done = 1;
5951 }
5952 return TRUE;
5953 }
5954
5955 /* Remove unused Official Procedure Descriptor entries. Currently we
5956 only remove those associated with functions in discarded link-once
5957 sections, or weakly defined functions that have been overridden. It
5958 would be possible to remove many more entries for statically linked
5959 applications. */
5960
5961 bfd_boolean
5962 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5963 bfd_boolean non_overlapping)
5964 {
5965 bfd *ibfd;
5966 bfd_boolean some_edited = FALSE;
5967 asection *need_pad = NULL;
5968
5969 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5970 {
5971 asection *sec;
5972 Elf_Internal_Rela *relstart, *rel, *relend;
5973 Elf_Internal_Shdr *symtab_hdr;
5974 Elf_Internal_Sym *local_syms;
5975 struct elf_link_hash_entry **sym_hashes;
5976 bfd_vma offset;
5977 bfd_size_type amt;
5978 long *opd_adjust;
5979 bfd_boolean need_edit, add_aux_fields;
5980 bfd_size_type cnt_16b = 0;
5981
5982 sec = bfd_get_section_by_name (ibfd, ".opd");
5983 if (sec == NULL)
5984 continue;
5985
5986 amt = sec->size * sizeof (long) / 8;
5987 opd_adjust = get_opd_info (sec);
5988 if (opd_adjust == NULL)
5989 {
5990 /* check_relocs hasn't been called. Must be a ld -r link
5991 or --just-symbols object. */
5992 opd_adjust = bfd_zalloc (obfd, amt);
5993 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5994 }
5995 memset (opd_adjust, 0, amt);
5996
5997 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
5998 continue;
5999
6000 if (sec->output_section == bfd_abs_section_ptr)
6001 continue;
6002
6003 /* Look through the section relocs. */
6004 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6005 continue;
6006
6007 local_syms = NULL;
6008 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6009 sym_hashes = elf_sym_hashes (ibfd);
6010
6011 /* Read the relocations. */
6012 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6013 info->keep_memory);
6014 if (relstart == NULL)
6015 return FALSE;
6016
6017 /* First run through the relocs to check they are sane, and to
6018 determine whether we need to edit this opd section. */
6019 need_edit = FALSE;
6020 need_pad = sec;
6021 offset = 0;
6022 relend = relstart + sec->reloc_count;
6023 for (rel = relstart; rel < relend; )
6024 {
6025 enum elf_ppc64_reloc_type r_type;
6026 unsigned long r_symndx;
6027 asection *sym_sec;
6028 struct elf_link_hash_entry *h;
6029 Elf_Internal_Sym *sym;
6030
6031 /* .opd contains a regular array of 16 or 24 byte entries. We're
6032 only interested in the reloc pointing to a function entry
6033 point. */
6034 if (rel->r_offset != offset
6035 || rel + 1 >= relend
6036 || (rel + 1)->r_offset != offset + 8)
6037 {
6038 /* If someone messes with .opd alignment then after a
6039 "ld -r" we might have padding in the middle of .opd.
6040 Also, there's nothing to prevent someone putting
6041 something silly in .opd with the assembler. No .opd
6042 optimization for them! */
6043 broken_opd:
6044 (*_bfd_error_handler)
6045 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6046 need_edit = FALSE;
6047 break;
6048 }
6049
6050 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6051 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6052 {
6053 (*_bfd_error_handler)
6054 (_("%B: unexpected reloc type %u in .opd section"),
6055 ibfd, r_type);
6056 need_edit = FALSE;
6057 break;
6058 }
6059
6060 r_symndx = ELF64_R_SYM (rel->r_info);
6061 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6062 r_symndx, ibfd))
6063 goto error_ret;
6064
6065 if (sym_sec == NULL || sym_sec->owner == NULL)
6066 {
6067 const char *sym_name;
6068 if (h != NULL)
6069 sym_name = h->root.root.string;
6070 else
6071 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym);
6072
6073 (*_bfd_error_handler)
6074 (_("%B: undefined sym `%s' in .opd section"),
6075 ibfd, sym_name);
6076 need_edit = FALSE;
6077 break;
6078 }
6079
6080 /* opd entries are always for functions defined in the
6081 current input bfd. If the symbol isn't defined in the
6082 input bfd, then we won't be using the function in this
6083 bfd; It must be defined in a linkonce section in another
6084 bfd, or is weak. It's also possible that we are
6085 discarding the function due to a linker script /DISCARD/,
6086 which we test for via the output_section. */
6087 if (sym_sec->owner != ibfd
6088 || sym_sec->output_section == bfd_abs_section_ptr)
6089 need_edit = TRUE;
6090
6091 rel += 2;
6092 if (rel == relend
6093 || (rel + 1 == relend && rel->r_offset == offset + 16))
6094 {
6095 if (sec->size == offset + 24)
6096 {
6097 need_pad = NULL;
6098 break;
6099 }
6100 if (rel == relend && sec->size == offset + 16)
6101 {
6102 cnt_16b++;
6103 break;
6104 }
6105 goto broken_opd;
6106 }
6107
6108 if (rel->r_offset == offset + 24)
6109 offset += 24;
6110 else if (rel->r_offset != offset + 16)
6111 goto broken_opd;
6112 else if (rel + 1 < relend
6113 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6114 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6115 {
6116 offset += 16;
6117 cnt_16b++;
6118 }
6119 else if (rel + 2 < relend
6120 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6121 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6122 {
6123 offset += 24;
6124 rel += 1;
6125 }
6126 else
6127 goto broken_opd;
6128 }
6129
6130 add_aux_fields = non_overlapping && cnt_16b > 0;
6131
6132 if (need_edit || add_aux_fields)
6133 {
6134 Elf_Internal_Rela *write_rel;
6135 bfd_byte *rptr, *wptr;
6136 bfd_byte *new_contents = NULL;
6137 bfd_boolean skip;
6138 long opd_ent_size;
6139
6140 /* This seems a waste of time as input .opd sections are all
6141 zeros as generated by gcc, but I suppose there's no reason
6142 this will always be so. We might start putting something in
6143 the third word of .opd entries. */
6144 if ((sec->flags & SEC_IN_MEMORY) == 0)
6145 {
6146 bfd_byte *loc;
6147 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6148 {
6149 if (loc != NULL)
6150 free (loc);
6151 error_ret:
6152 if (local_syms != NULL
6153 && symtab_hdr->contents != (unsigned char *) local_syms)
6154 free (local_syms);
6155 if (elf_section_data (sec)->relocs != relstart)
6156 free (relstart);
6157 return FALSE;
6158 }
6159 sec->contents = loc;
6160 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6161 }
6162
6163 elf_section_data (sec)->relocs = relstart;
6164
6165 wptr = sec->contents;
6166 rptr = sec->contents;
6167 new_contents = sec->contents;
6168
6169 if (add_aux_fields)
6170 {
6171 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6172 if (new_contents == NULL)
6173 return FALSE;
6174 need_pad = FALSE;
6175 wptr = new_contents;
6176 }
6177
6178 write_rel = relstart;
6179 skip = FALSE;
6180 offset = 0;
6181 opd_ent_size = 0;
6182 for (rel = relstart; rel < relend; rel++)
6183 {
6184 unsigned long r_symndx;
6185 asection *sym_sec;
6186 struct elf_link_hash_entry *h;
6187 Elf_Internal_Sym *sym;
6188
6189 r_symndx = ELF64_R_SYM (rel->r_info);
6190 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6191 r_symndx, ibfd))
6192 goto error_ret;
6193
6194 if (rel->r_offset == offset)
6195 {
6196 struct ppc_link_hash_entry *fdh = NULL;
6197
6198 /* See if the .opd entry is full 24 byte or
6199 16 byte (with fd_aux entry overlapped with next
6200 fd_func). */
6201 opd_ent_size = 24;
6202 if ((rel + 2 == relend && sec->size == offset + 16)
6203 || (rel + 3 < relend
6204 && rel[2].r_offset == offset + 16
6205 && rel[3].r_offset == offset + 24
6206 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6207 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6208 opd_ent_size = 16;
6209
6210 if (h != NULL
6211 && h->root.root.string[0] == '.')
6212 {
6213 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6214 ppc_hash_table (info));
6215 if (fdh != NULL
6216 && fdh->elf.root.type != bfd_link_hash_defined
6217 && fdh->elf.root.type != bfd_link_hash_defweak)
6218 fdh = NULL;
6219 }
6220
6221 skip = (sym_sec->owner != ibfd
6222 || sym_sec->output_section == bfd_abs_section_ptr);
6223 if (skip)
6224 {
6225 if (fdh != NULL && sym_sec->owner == ibfd)
6226 {
6227 /* Arrange for the function descriptor sym
6228 to be dropped. */
6229 fdh->elf.root.u.def.value = 0;
6230 fdh->elf.root.u.def.section = sym_sec;
6231 }
6232 opd_adjust[rel->r_offset / 8] = -1;
6233 }
6234 else
6235 {
6236 /* We'll be keeping this opd entry. */
6237
6238 if (fdh != NULL)
6239 {
6240 /* Redefine the function descriptor symbol to
6241 this location in the opd section. It is
6242 necessary to update the value here rather
6243 than using an array of adjustments as we do
6244 for local symbols, because various places
6245 in the generic ELF code use the value
6246 stored in u.def.value. */
6247 fdh->elf.root.u.def.value = wptr - new_contents;
6248 fdh->adjust_done = 1;
6249 }
6250
6251 /* Local syms are a bit tricky. We could
6252 tweak them as they can be cached, but
6253 we'd need to look through the local syms
6254 for the function descriptor sym which we
6255 don't have at the moment. So keep an
6256 array of adjustments. */
6257 opd_adjust[rel->r_offset / 8]
6258 = (wptr - new_contents) - (rptr - sec->contents);
6259
6260 if (wptr != rptr)
6261 memcpy (wptr, rptr, opd_ent_size);
6262 wptr += opd_ent_size;
6263 if (add_aux_fields && opd_ent_size == 16)
6264 {
6265 memset (wptr, '\0', 8);
6266 wptr += 8;
6267 }
6268 }
6269 rptr += opd_ent_size;
6270 offset += opd_ent_size;
6271 }
6272
6273 if (skip)
6274 {
6275 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6276 if (info->shared)
6277 {
6278 /* We won't be needing dynamic relocs here. */
6279 struct ppc_dyn_relocs **pp;
6280 struct ppc_dyn_relocs *p;
6281
6282 if (h != NULL)
6283 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6284 else if (sym_sec != NULL)
6285 pp = ((struct ppc_dyn_relocs **)
6286 &elf_section_data (sym_sec)->local_dynrel);
6287 else
6288 pp = ((struct ppc_dyn_relocs **)
6289 &elf_section_data (sec)->local_dynrel);
6290 while ((p = *pp) != NULL)
6291 {
6292 if (p->sec == sec)
6293 {
6294 p->count -= 1;
6295 if (p->count == 0)
6296 *pp = p->next;
6297 break;
6298 }
6299 pp = &p->next;
6300 }
6301 }
6302 }
6303 else
6304 {
6305 /* We need to adjust any reloc offsets to point to the
6306 new opd entries. While we're at it, we may as well
6307 remove redundant relocs. */
6308 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6309 if (write_rel != rel)
6310 memcpy (write_rel, rel, sizeof (*rel));
6311 ++write_rel;
6312 }
6313 }
6314
6315 sec->size = wptr - new_contents;
6316 sec->reloc_count = write_rel - relstart;
6317 if (add_aux_fields)
6318 {
6319 free (sec->contents);
6320 sec->contents = new_contents;
6321 }
6322
6323 /* Fudge the size too, as this is used later in
6324 elf_bfd_final_link if we are emitting relocs. */
6325 elf_section_data (sec)->rel_hdr.sh_size
6326 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6327 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6328 some_edited = TRUE;
6329 }
6330 else if (elf_section_data (sec)->relocs != relstart)
6331 free (relstart);
6332
6333 if (local_syms != NULL
6334 && symtab_hdr->contents != (unsigned char *) local_syms)
6335 {
6336 if (!info->keep_memory)
6337 free (local_syms);
6338 else
6339 symtab_hdr->contents = (unsigned char *) local_syms;
6340 }
6341 }
6342
6343 if (some_edited)
6344 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6345
6346 /* If we are doing a final link and the last .opd entry is just 16 byte
6347 long, add a 8 byte padding after it. */
6348 if (need_pad != NULL && !info->relocatable)
6349 {
6350 bfd_byte *p;
6351
6352 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6353 {
6354 BFD_ASSERT (need_pad->size > 0);
6355
6356 p = bfd_malloc (need_pad->size + 8);
6357 if (p == NULL)
6358 return FALSE;
6359
6360 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6361 p, 0, need_pad->size))
6362 return FALSE;
6363
6364 need_pad->contents = p;
6365 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6366 }
6367 else
6368 {
6369 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6370 if (p == NULL)
6371 return FALSE;
6372
6373 need_pad->contents = p;
6374 }
6375
6376 memset (need_pad->contents + need_pad->size, 0, 8);
6377 need_pad->size += 8;
6378 }
6379
6380 return TRUE;
6381 }
6382
6383 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6384
6385 asection *
6386 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6387 {
6388 struct ppc_link_hash_table *htab;
6389
6390 htab = ppc_hash_table (info);
6391 if (htab->tls_get_addr != NULL)
6392 {
6393 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6394
6395 while (h->elf.root.type == bfd_link_hash_indirect
6396 || h->elf.root.type == bfd_link_hash_warning)
6397 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6398
6399 htab->tls_get_addr = h;
6400
6401 if (htab->tls_get_addr_fd == NULL
6402 && h->oh != NULL
6403 && h->oh->is_func_descriptor
6404 && (h->oh->elf.root.type == bfd_link_hash_defined
6405 || h->oh->elf.root.type == bfd_link_hash_defweak))
6406 htab->tls_get_addr_fd = h->oh;
6407 }
6408
6409 if (htab->tls_get_addr_fd != NULL)
6410 {
6411 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6412
6413 while (h->elf.root.type == bfd_link_hash_indirect
6414 || h->elf.root.type == bfd_link_hash_warning)
6415 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6416
6417 htab->tls_get_addr_fd = h;
6418 }
6419
6420 return _bfd_elf_tls_setup (obfd, info);
6421 }
6422
6423 /* Run through all the TLS relocs looking for optimization
6424 opportunities. The linker has been hacked (see ppc64elf.em) to do
6425 a preliminary section layout so that we know the TLS segment
6426 offsets. We can't optimize earlier because some optimizations need
6427 to know the tp offset, and we need to optimize before allocating
6428 dynamic relocations. */
6429
6430 bfd_boolean
6431 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6432 {
6433 bfd *ibfd;
6434 asection *sec;
6435 struct ppc_link_hash_table *htab;
6436
6437 if (info->relocatable || info->shared)
6438 return TRUE;
6439
6440 htab = ppc_hash_table (info);
6441 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6442 {
6443 Elf_Internal_Sym *locsyms = NULL;
6444
6445 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6446 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6447 {
6448 Elf_Internal_Rela *relstart, *rel, *relend;
6449 int expecting_tls_get_addr;
6450
6451 /* Read the relocations. */
6452 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6453 info->keep_memory);
6454 if (relstart == NULL)
6455 return FALSE;
6456
6457 expecting_tls_get_addr = 0;
6458 relend = relstart + sec->reloc_count;
6459 for (rel = relstart; rel < relend; rel++)
6460 {
6461 enum elf_ppc64_reloc_type r_type;
6462 unsigned long r_symndx;
6463 struct elf_link_hash_entry *h;
6464 Elf_Internal_Sym *sym;
6465 asection *sym_sec;
6466 char *tls_mask;
6467 char tls_set, tls_clear, tls_type = 0;
6468 bfd_vma value;
6469 bfd_boolean ok_tprel, is_local;
6470
6471 r_symndx = ELF64_R_SYM (rel->r_info);
6472 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6473 r_symndx, ibfd))
6474 {
6475 err_free_rel:
6476 if (elf_section_data (sec)->relocs != relstart)
6477 free (relstart);
6478 if (locsyms != NULL
6479 && (elf_tdata (ibfd)->symtab_hdr.contents
6480 != (unsigned char *) locsyms))
6481 free (locsyms);
6482 return FALSE;
6483 }
6484
6485 if (h != NULL)
6486 {
6487 if (h->root.type != bfd_link_hash_defined
6488 && h->root.type != bfd_link_hash_defweak)
6489 continue;
6490 value = h->root.u.def.value;
6491 }
6492 else
6493 /* Symbols referenced by TLS relocs must be of type
6494 STT_TLS. So no need for .opd local sym adjust. */
6495 value = sym->st_value;
6496
6497 ok_tprel = FALSE;
6498 is_local = FALSE;
6499 if (h == NULL
6500 || !h->def_dynamic)
6501 {
6502 is_local = TRUE;
6503 value += sym_sec->output_offset;
6504 value += sym_sec->output_section->vma;
6505 value -= htab->elf.tls_sec->vma;
6506 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6507 < (bfd_vma) 1 << 32);
6508 }
6509
6510 r_type = ELF64_R_TYPE (rel->r_info);
6511 switch (r_type)
6512 {
6513 case R_PPC64_GOT_TLSLD16:
6514 case R_PPC64_GOT_TLSLD16_LO:
6515 case R_PPC64_GOT_TLSLD16_HI:
6516 case R_PPC64_GOT_TLSLD16_HA:
6517 /* These relocs should never be against a symbol
6518 defined in a shared lib. Leave them alone if
6519 that turns out to be the case. */
6520 ppc64_tlsld_got (ibfd)->refcount -= 1;
6521 if (!is_local)
6522 continue;
6523
6524 /* LD -> LE */
6525 tls_set = 0;
6526 tls_clear = TLS_LD;
6527 tls_type = TLS_TLS | TLS_LD;
6528 expecting_tls_get_addr = 1;
6529 break;
6530
6531 case R_PPC64_GOT_TLSGD16:
6532 case R_PPC64_GOT_TLSGD16_LO:
6533 case R_PPC64_GOT_TLSGD16_HI:
6534 case R_PPC64_GOT_TLSGD16_HA:
6535 if (ok_tprel)
6536 /* GD -> LE */
6537 tls_set = 0;
6538 else
6539 /* GD -> IE */
6540 tls_set = TLS_TLS | TLS_TPRELGD;
6541 tls_clear = TLS_GD;
6542 tls_type = TLS_TLS | TLS_GD;
6543 expecting_tls_get_addr = 1;
6544 break;
6545
6546 case R_PPC64_GOT_TPREL16_DS:
6547 case R_PPC64_GOT_TPREL16_LO_DS:
6548 case R_PPC64_GOT_TPREL16_HI:
6549 case R_PPC64_GOT_TPREL16_HA:
6550 expecting_tls_get_addr = 0;
6551 if (ok_tprel)
6552 {
6553 /* IE -> LE */
6554 tls_set = 0;
6555 tls_clear = TLS_TPREL;
6556 tls_type = TLS_TLS | TLS_TPREL;
6557 break;
6558 }
6559 else
6560 continue;
6561
6562 case R_PPC64_REL14:
6563 case R_PPC64_REL14_BRTAKEN:
6564 case R_PPC64_REL14_BRNTAKEN:
6565 case R_PPC64_REL24:
6566 if (h != NULL
6567 && (h == &htab->tls_get_addr->elf
6568 || h == &htab->tls_get_addr_fd->elf))
6569 {
6570 if (!expecting_tls_get_addr
6571 && rel != relstart
6572 && ((ELF64_R_TYPE (rel[-1].r_info)
6573 == R_PPC64_TOC16)
6574 || (ELF64_R_TYPE (rel[-1].r_info)
6575 == R_PPC64_TOC16_LO)))
6576 {
6577 /* Check for toc tls entries. */
6578 char *toc_tls;
6579 int retval;
6580
6581 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6582 rel - 1, ibfd);
6583 if (retval == 0)
6584 goto err_free_rel;
6585 if (toc_tls != NULL)
6586 expecting_tls_get_addr = retval > 1;
6587 }
6588
6589 if (expecting_tls_get_addr)
6590 {
6591 struct plt_entry *ent;
6592 for (ent = h->plt.plist; ent; ent = ent->next)
6593 if (ent->addend == 0)
6594 {
6595 if (ent->plt.refcount > 0)
6596 ent->plt.refcount -= 1;
6597 break;
6598 }
6599 }
6600 }
6601 expecting_tls_get_addr = 0;
6602 continue;
6603
6604 case R_PPC64_TPREL64:
6605 expecting_tls_get_addr = 0;
6606 if (ok_tprel)
6607 {
6608 /* IE -> LE */
6609 tls_set = TLS_EXPLICIT;
6610 tls_clear = TLS_TPREL;
6611 break;
6612 }
6613 else
6614 continue;
6615
6616 case R_PPC64_DTPMOD64:
6617 expecting_tls_get_addr = 0;
6618 if (rel + 1 < relend
6619 && (rel[1].r_info
6620 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6621 && rel[1].r_offset == rel->r_offset + 8)
6622 {
6623 if (ok_tprel)
6624 /* GD -> LE */
6625 tls_set = TLS_EXPLICIT | TLS_GD;
6626 else
6627 /* GD -> IE */
6628 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6629 tls_clear = TLS_GD;
6630 }
6631 else
6632 {
6633 if (!is_local)
6634 continue;
6635
6636 /* LD -> LE */
6637 tls_set = TLS_EXPLICIT;
6638 tls_clear = TLS_LD;
6639 }
6640 break;
6641
6642 default:
6643 expecting_tls_get_addr = 0;
6644 continue;
6645 }
6646
6647 if ((tls_set & TLS_EXPLICIT) == 0)
6648 {
6649 struct got_entry *ent;
6650
6651 /* Adjust got entry for this reloc. */
6652 if (h != NULL)
6653 ent = h->got.glist;
6654 else
6655 ent = elf_local_got_ents (ibfd)[r_symndx];
6656
6657 for (; ent != NULL; ent = ent->next)
6658 if (ent->addend == rel->r_addend
6659 && ent->owner == ibfd
6660 && ent->tls_type == tls_type)
6661 break;
6662 if (ent == NULL)
6663 abort ();
6664
6665 if (tls_set == 0)
6666 {
6667 /* We managed to get rid of a got entry. */
6668 if (ent->got.refcount > 0)
6669 ent->got.refcount -= 1;
6670 }
6671 }
6672 else if (h != NULL)
6673 {
6674 struct ppc_link_hash_entry * eh;
6675 struct ppc_dyn_relocs **pp;
6676 struct ppc_dyn_relocs *p;
6677
6678 /* Adjust dynamic relocs. */
6679 eh = (struct ppc_link_hash_entry *) h;
6680 for (pp = &eh->dyn_relocs;
6681 (p = *pp) != NULL;
6682 pp = &p->next)
6683 if (p->sec == sec)
6684 {
6685 /* If we got rid of a DTPMOD/DTPREL reloc
6686 pair then we'll lose one or two dyn
6687 relocs. */
6688 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6689 p->count -= 1;
6690 p->count -= 1;
6691 if (p->count == 0)
6692 *pp = p->next;
6693 break;
6694 }
6695 }
6696
6697 *tls_mask |= tls_set;
6698 *tls_mask &= ~tls_clear;
6699 }
6700
6701 if (elf_section_data (sec)->relocs != relstart)
6702 free (relstart);
6703 }
6704
6705 if (locsyms != NULL
6706 && (elf_tdata (ibfd)->symtab_hdr.contents
6707 != (unsigned char *) locsyms))
6708 {
6709 if (!info->keep_memory)
6710 free (locsyms);
6711 else
6712 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6713 }
6714 }
6715 return TRUE;
6716 }
6717
6718 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6719 the values of any global symbols in a toc section that has been
6720 edited. Globals in toc sections should be a rarity, so this function
6721 sets a flag if any are found in toc sections other than the one just
6722 edited, so that futher hash table traversals can be avoided. */
6723
6724 struct adjust_toc_info
6725 {
6726 asection *toc;
6727 unsigned long *skip;
6728 bfd_boolean global_toc_syms;
6729 };
6730
6731 static bfd_boolean
6732 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6733 {
6734 struct ppc_link_hash_entry *eh;
6735 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6736
6737 if (h->root.type == bfd_link_hash_indirect)
6738 return TRUE;
6739
6740 if (h->root.type == bfd_link_hash_warning)
6741 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6742
6743 if (h->root.type != bfd_link_hash_defined
6744 && h->root.type != bfd_link_hash_defweak)
6745 return TRUE;
6746
6747 eh = (struct ppc_link_hash_entry *) h;
6748 if (eh->adjust_done)
6749 return TRUE;
6750
6751 if (eh->elf.root.u.def.section == toc_inf->toc)
6752 {
6753 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6754 if (skip != (unsigned long) -1)
6755 eh->elf.root.u.def.value -= skip;
6756 else
6757 {
6758 (*_bfd_error_handler)
6759 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6760 eh->elf.root.u.def.section = &bfd_abs_section;
6761 eh->elf.root.u.def.value = 0;
6762 }
6763 eh->adjust_done = 1;
6764 }
6765 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6766 toc_inf->global_toc_syms = TRUE;
6767
6768 return TRUE;
6769 }
6770
6771 /* Examine all relocs referencing .toc sections in order to remove
6772 unused .toc entries. */
6773
6774 bfd_boolean
6775 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6776 {
6777 bfd *ibfd;
6778 struct adjust_toc_info toc_inf;
6779
6780 toc_inf.global_toc_syms = TRUE;
6781 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6782 {
6783 asection *toc, *sec;
6784 Elf_Internal_Shdr *symtab_hdr;
6785 Elf_Internal_Sym *local_syms;
6786 struct elf_link_hash_entry **sym_hashes;
6787 Elf_Internal_Rela *relstart, *rel;
6788 unsigned long *skip, *drop;
6789 unsigned char *used;
6790 unsigned char *keep, last, some_unused;
6791
6792 toc = bfd_get_section_by_name (ibfd, ".toc");
6793 if (toc == NULL
6794 || toc->size == 0
6795 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6796 || elf_discarded_section (toc))
6797 continue;
6798
6799 local_syms = NULL;
6800 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6801 sym_hashes = elf_sym_hashes (ibfd);
6802
6803 /* Look at sections dropped from the final link. */
6804 skip = NULL;
6805 relstart = NULL;
6806 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6807 {
6808 if (sec->reloc_count == 0
6809 || !elf_discarded_section (sec)
6810 || get_opd_info (sec)
6811 || (sec->flags & SEC_ALLOC) == 0
6812 || (sec->flags & SEC_DEBUGGING) != 0)
6813 continue;
6814
6815 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6816 if (relstart == NULL)
6817 goto error_ret;
6818
6819 /* Run through the relocs to see which toc entries might be
6820 unused. */
6821 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6822 {
6823 enum elf_ppc64_reloc_type r_type;
6824 unsigned long r_symndx;
6825 asection *sym_sec;
6826 struct elf_link_hash_entry *h;
6827 Elf_Internal_Sym *sym;
6828 bfd_vma val;
6829
6830 r_type = ELF64_R_TYPE (rel->r_info);
6831 switch (r_type)
6832 {
6833 default:
6834 continue;
6835
6836 case R_PPC64_TOC16:
6837 case R_PPC64_TOC16_LO:
6838 case R_PPC64_TOC16_HI:
6839 case R_PPC64_TOC16_HA:
6840 case R_PPC64_TOC16_DS:
6841 case R_PPC64_TOC16_LO_DS:
6842 break;
6843 }
6844
6845 r_symndx = ELF64_R_SYM (rel->r_info);
6846 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6847 r_symndx, ibfd))
6848 goto error_ret;
6849
6850 if (sym_sec != toc)
6851 continue;
6852
6853 if (h != NULL)
6854 val = h->root.u.def.value;
6855 else
6856 val = sym->st_value;
6857 val += rel->r_addend;
6858
6859 if (val >= toc->size)
6860 continue;
6861
6862 /* Anything in the toc ought to be aligned to 8 bytes.
6863 If not, don't mark as unused. */
6864 if (val & 7)
6865 continue;
6866
6867 if (skip == NULL)
6868 {
6869 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6870 if (skip == NULL)
6871 goto error_ret;
6872 }
6873
6874 skip[val >> 3] = 1;
6875 }
6876
6877 if (elf_section_data (sec)->relocs != relstart)
6878 free (relstart);
6879 }
6880
6881 if (skip == NULL)
6882 continue;
6883
6884 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6885 if (used == NULL)
6886 {
6887 error_ret:
6888 if (local_syms != NULL
6889 && symtab_hdr->contents != (unsigned char *) local_syms)
6890 free (local_syms);
6891 if (sec != NULL
6892 && relstart != NULL
6893 && elf_section_data (sec)->relocs != relstart)
6894 free (relstart);
6895 if (skip != NULL)
6896 free (skip);
6897 return FALSE;
6898 }
6899
6900 /* Now check all kept sections that might reference the toc. */
6901 for (sec = ibfd->sections;
6902 sec != NULL;
6903 /* Check the toc itself last. */
6904 sec = (sec == toc ? NULL
6905 : sec->next == toc && sec->next->next ? sec->next->next
6906 : sec->next == NULL ? toc
6907 : sec->next))
6908 {
6909 int repeat;
6910
6911 if (sec->reloc_count == 0
6912 || elf_discarded_section (sec)
6913 || get_opd_info (sec)
6914 || (sec->flags & SEC_ALLOC) == 0
6915 || (sec->flags & SEC_DEBUGGING) != 0)
6916 continue;
6917
6918 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
6919 if (relstart == NULL)
6920 goto error_ret;
6921
6922 /* Mark toc entries referenced as used. */
6923 repeat = 0;
6924 do
6925 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6926 {
6927 enum elf_ppc64_reloc_type r_type;
6928 unsigned long r_symndx;
6929 asection *sym_sec;
6930 struct elf_link_hash_entry *h;
6931 Elf_Internal_Sym *sym;
6932 bfd_vma val;
6933
6934 r_type = ELF64_R_TYPE (rel->r_info);
6935 switch (r_type)
6936 {
6937 case R_PPC64_TOC16:
6938 case R_PPC64_TOC16_LO:
6939 case R_PPC64_TOC16_HI:
6940 case R_PPC64_TOC16_HA:
6941 case R_PPC64_TOC16_DS:
6942 case R_PPC64_TOC16_LO_DS:
6943 /* In case we're taking addresses of toc entries. */
6944 case R_PPC64_ADDR64:
6945 break;
6946
6947 default:
6948 continue;
6949 }
6950
6951 r_symndx = ELF64_R_SYM (rel->r_info);
6952 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6953 r_symndx, ibfd))
6954 {
6955 free (used);
6956 goto error_ret;
6957 }
6958
6959 if (sym_sec != toc)
6960 continue;
6961
6962 if (h != NULL)
6963 val = h->root.u.def.value;
6964 else
6965 val = sym->st_value;
6966 val += rel->r_addend;
6967
6968 if (val >= toc->size)
6969 continue;
6970
6971 /* For the toc section, we only mark as used if
6972 this entry itself isn't unused. */
6973 if (sec == toc
6974 && !used[val >> 3]
6975 && (used[rel->r_offset >> 3]
6976 || !skip[rel->r_offset >> 3]))
6977 /* Do all the relocs again, to catch reference
6978 chains. */
6979 repeat = 1;
6980
6981 used[val >> 3] = 1;
6982 }
6983 while (repeat);
6984 }
6985
6986 /* Merge the used and skip arrays. Assume that TOC
6987 doublewords not appearing as either used or unused belong
6988 to to an entry more than one doubleword in size. */
6989 for (drop = skip, keep = used, last = 0, some_unused = 0;
6990 drop < skip + (toc->size + 7) / 8;
6991 ++drop, ++keep)
6992 {
6993 if (*keep)
6994 {
6995 *drop = 0;
6996 last = 0;
6997 }
6998 else if (*drop)
6999 {
7000 some_unused = 1;
7001 last = 1;
7002 }
7003 else
7004 *drop = last;
7005 }
7006
7007 free (used);
7008
7009 if (some_unused)
7010 {
7011 bfd_byte *contents, *src;
7012 unsigned long off;
7013
7014 /* Shuffle the toc contents, and at the same time convert the
7015 skip array from booleans into offsets. */
7016 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7017 goto error_ret;
7018
7019 elf_section_data (toc)->this_hdr.contents = contents;
7020
7021 for (src = contents, off = 0, drop = skip;
7022 src < contents + toc->size;
7023 src += 8, ++drop)
7024 {
7025 if (*drop)
7026 {
7027 *drop = (unsigned long) -1;
7028 off += 8;
7029 }
7030 else if (off != 0)
7031 {
7032 *drop = off;
7033 memcpy (src - off, src, 8);
7034 }
7035 }
7036 toc->rawsize = toc->size;
7037 toc->size = src - contents - off;
7038
7039 if (toc->reloc_count != 0)
7040 {
7041 Elf_Internal_Rela *wrel;
7042 bfd_size_type sz;
7043
7044 /* Read toc relocs. */
7045 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7046 TRUE);
7047 if (relstart == NULL)
7048 goto error_ret;
7049
7050 /* Remove unused toc relocs, and adjust those we keep. */
7051 wrel = relstart;
7052 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7053 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7054 {
7055 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7056 wrel->r_info = rel->r_info;
7057 wrel->r_addend = rel->r_addend;
7058 ++wrel;
7059 }
7060 toc->reloc_count = wrel - relstart;
7061 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7062 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7063 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7064 }
7065
7066 /* Adjust addends for relocs against the toc section sym. */
7067 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7068 {
7069 if (sec->reloc_count == 0
7070 || elf_discarded_section (sec))
7071 continue;
7072
7073 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7074 TRUE);
7075 if (relstart == NULL)
7076 goto error_ret;
7077
7078 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7079 {
7080 enum elf_ppc64_reloc_type r_type;
7081 unsigned long r_symndx;
7082 asection *sym_sec;
7083 struct elf_link_hash_entry *h;
7084 Elf_Internal_Sym *sym;
7085
7086 r_type = ELF64_R_TYPE (rel->r_info);
7087 switch (r_type)
7088 {
7089 default:
7090 continue;
7091
7092 case R_PPC64_TOC16:
7093 case R_PPC64_TOC16_LO:
7094 case R_PPC64_TOC16_HI:
7095 case R_PPC64_TOC16_HA:
7096 case R_PPC64_TOC16_DS:
7097 case R_PPC64_TOC16_LO_DS:
7098 case R_PPC64_ADDR64:
7099 break;
7100 }
7101
7102 r_symndx = ELF64_R_SYM (rel->r_info);
7103 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7104 r_symndx, ibfd))
7105 goto error_ret;
7106
7107 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7108 continue;
7109
7110 rel->r_addend -= skip[rel->r_addend >> 3];
7111 }
7112 }
7113
7114 /* We shouldn't have local or global symbols defined in the TOC,
7115 but handle them anyway. */
7116 if (local_syms != NULL)
7117 {
7118 Elf_Internal_Sym *sym;
7119
7120 for (sym = local_syms;
7121 sym < local_syms + symtab_hdr->sh_info;
7122 ++sym)
7123 if (sym->st_shndx != SHN_UNDEF
7124 && (sym->st_shndx < SHN_LORESERVE
7125 || sym->st_shndx > SHN_HIRESERVE)
7126 && sym->st_value != 0
7127 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7128 {
7129 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7130 sym->st_value -= skip[sym->st_value >> 3];
7131 else
7132 {
7133 (*_bfd_error_handler)
7134 (_("%s defined in removed toc entry"),
7135 bfd_elf_sym_name (ibfd, symtab_hdr, sym));
7136 sym->st_value = 0;
7137 sym->st_shndx = SHN_ABS;
7138 }
7139 symtab_hdr->contents = (unsigned char *) local_syms;
7140 }
7141 }
7142
7143 /* Finally, adjust any global syms defined in the toc. */
7144 if (toc_inf.global_toc_syms)
7145 {
7146 toc_inf.toc = toc;
7147 toc_inf.skip = skip;
7148 toc_inf.global_toc_syms = FALSE;
7149 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7150 &toc_inf);
7151 }
7152 }
7153
7154 if (local_syms != NULL
7155 && symtab_hdr->contents != (unsigned char *) local_syms)
7156 {
7157 if (!info->keep_memory)
7158 free (local_syms);
7159 else
7160 symtab_hdr->contents = (unsigned char *) local_syms;
7161 }
7162 free (skip);
7163 }
7164
7165 return TRUE;
7166 }
7167
7168 /* Allocate space in .plt, .got and associated reloc sections for
7169 dynamic relocs. */
7170
7171 static bfd_boolean
7172 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7173 {
7174 struct bfd_link_info *info;
7175 struct ppc_link_hash_table *htab;
7176 asection *s;
7177 struct ppc_link_hash_entry *eh;
7178 struct ppc_dyn_relocs *p;
7179 struct got_entry *gent;
7180
7181 if (h->root.type == bfd_link_hash_indirect)
7182 return TRUE;
7183
7184 if (h->root.type == bfd_link_hash_warning)
7185 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7186
7187 info = (struct bfd_link_info *) inf;
7188 htab = ppc_hash_table (info);
7189
7190 if (htab->elf.dynamic_sections_created
7191 && h->dynindx != -1
7192 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7193 {
7194 struct plt_entry *pent;
7195 bfd_boolean doneone = FALSE;
7196 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7197 if (pent->plt.refcount > 0)
7198 {
7199 /* If this is the first .plt entry, make room for the special
7200 first entry. */
7201 s = htab->plt;
7202 if (s->size == 0)
7203 s->size += PLT_INITIAL_ENTRY_SIZE;
7204
7205 pent->plt.offset = s->size;
7206
7207 /* Make room for this entry. */
7208 s->size += PLT_ENTRY_SIZE;
7209
7210 /* Make room for the .glink code. */
7211 s = htab->glink;
7212 if (s->size == 0)
7213 s->size += GLINK_CALL_STUB_SIZE;
7214 /* We need bigger stubs past index 32767. */
7215 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7216 s->size += 4;
7217 s->size += 2*4;
7218
7219 /* We also need to make an entry in the .rela.plt section. */
7220 s = htab->relplt;
7221 s->size += sizeof (Elf64_External_Rela);
7222 doneone = TRUE;
7223 }
7224 else
7225 pent->plt.offset = (bfd_vma) -1;
7226 if (!doneone)
7227 {
7228 h->plt.plist = NULL;
7229 h->needs_plt = 0;
7230 }
7231 }
7232 else
7233 {
7234 h->plt.plist = NULL;
7235 h->needs_plt = 0;
7236 }
7237
7238 eh = (struct ppc_link_hash_entry *) h;
7239 /* Run through the TLS GD got entries first if we're changing them
7240 to TPREL. */
7241 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7242 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7243 if (gent->got.refcount > 0
7244 && (gent->tls_type & TLS_GD) != 0)
7245 {
7246 /* This was a GD entry that has been converted to TPREL. If
7247 there happens to be a TPREL entry we can use that one. */
7248 struct got_entry *ent;
7249 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7250 if (ent->got.refcount > 0
7251 && (ent->tls_type & TLS_TPREL) != 0
7252 && ent->addend == gent->addend
7253 && ent->owner == gent->owner)
7254 {
7255 gent->got.refcount = 0;
7256 break;
7257 }
7258
7259 /* If not, then we'll be using our own TPREL entry. */
7260 if (gent->got.refcount != 0)
7261 gent->tls_type = TLS_TLS | TLS_TPREL;
7262 }
7263
7264 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7265 if (gent->got.refcount > 0)
7266 {
7267 bfd_boolean dyn;
7268
7269 /* Make sure this symbol is output as a dynamic symbol.
7270 Undefined weak syms won't yet be marked as dynamic,
7271 nor will all TLS symbols. */
7272 if (h->dynindx == -1
7273 && !h->forced_local)
7274 {
7275 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7276 return FALSE;
7277 }
7278
7279 if ((gent->tls_type & TLS_LD) != 0
7280 && !h->def_dynamic)
7281 {
7282 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7283 continue;
7284 }
7285
7286 s = ppc64_elf_tdata (gent->owner)->got;
7287 gent->got.offset = s->size;
7288 s->size
7289 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7290 dyn = htab->elf.dynamic_sections_created;
7291 if ((info->shared
7292 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7293 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7294 || h->root.type != bfd_link_hash_undefweak))
7295 ppc64_elf_tdata (gent->owner)->relgot->size
7296 += (gent->tls_type & eh->tls_mask & TLS_GD
7297 ? 2 * sizeof (Elf64_External_Rela)
7298 : sizeof (Elf64_External_Rela));
7299 }
7300 else
7301 gent->got.offset = (bfd_vma) -1;
7302
7303 if (eh->dyn_relocs == NULL)
7304 return TRUE;
7305
7306 /* In the shared -Bsymbolic case, discard space allocated for
7307 dynamic pc-relative relocs against symbols which turn out to be
7308 defined in regular objects. For the normal shared case, discard
7309 space for relocs that have become local due to symbol visibility
7310 changes. */
7311
7312 if (info->shared)
7313 {
7314 /* Relocs that use pc_count are those that appear on a call insn,
7315 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7316 generated via assembly. We want calls to protected symbols to
7317 resolve directly to the function rather than going via the plt.
7318 If people want function pointer comparisons to work as expected
7319 then they should avoid writing weird assembly. */
7320 if (SYMBOL_CALLS_LOCAL (info, h))
7321 {
7322 struct ppc_dyn_relocs **pp;
7323
7324 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7325 {
7326 p->count -= p->pc_count;
7327 p->pc_count = 0;
7328 if (p->count == 0)
7329 *pp = p->next;
7330 else
7331 pp = &p->next;
7332 }
7333 }
7334
7335 /* Also discard relocs on undefined weak syms with non-default
7336 visibility. */
7337 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7338 && h->root.type == bfd_link_hash_undefweak)
7339 eh->dyn_relocs = NULL;
7340 }
7341 else if (ELIMINATE_COPY_RELOCS)
7342 {
7343 /* For the non-shared case, discard space for relocs against
7344 symbols which turn out to need copy relocs or are not
7345 dynamic. */
7346
7347 if (!h->non_got_ref
7348 && h->def_dynamic
7349 && !h->def_regular)
7350 {
7351 /* Make sure this symbol is output as a dynamic symbol.
7352 Undefined weak syms won't yet be marked as dynamic. */
7353 if (h->dynindx == -1
7354 && !h->forced_local)
7355 {
7356 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7357 return FALSE;
7358 }
7359
7360 /* If that succeeded, we know we'll be keeping all the
7361 relocs. */
7362 if (h->dynindx != -1)
7363 goto keep;
7364 }
7365
7366 eh->dyn_relocs = NULL;
7367
7368 keep: ;
7369 }
7370
7371 /* Finally, allocate space. */
7372 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7373 {
7374 asection *sreloc = elf_section_data (p->sec)->sreloc;
7375 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7376 }
7377
7378 return TRUE;
7379 }
7380
7381 /* Find any dynamic relocs that apply to read-only sections. */
7382
7383 static bfd_boolean
7384 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7385 {
7386 struct ppc_link_hash_entry *eh;
7387 struct ppc_dyn_relocs *p;
7388
7389 if (h->root.type == bfd_link_hash_warning)
7390 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7391
7392 eh = (struct ppc_link_hash_entry *) h;
7393 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7394 {
7395 asection *s = p->sec->output_section;
7396
7397 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7398 {
7399 struct bfd_link_info *info = inf;
7400
7401 info->flags |= DF_TEXTREL;
7402
7403 /* Not an error, just cut short the traversal. */
7404 return FALSE;
7405 }
7406 }
7407 return TRUE;
7408 }
7409
7410 /* Set the sizes of the dynamic sections. */
7411
7412 static bfd_boolean
7413 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7414 struct bfd_link_info *info)
7415 {
7416 struct ppc_link_hash_table *htab;
7417 bfd *dynobj;
7418 asection *s;
7419 bfd_boolean relocs;
7420 bfd *ibfd;
7421
7422 htab = ppc_hash_table (info);
7423 dynobj = htab->elf.dynobj;
7424 if (dynobj == NULL)
7425 abort ();
7426
7427 if (htab->elf.dynamic_sections_created)
7428 {
7429 /* Set the contents of the .interp section to the interpreter. */
7430 if (info->executable)
7431 {
7432 s = bfd_get_section_by_name (dynobj, ".interp");
7433 if (s == NULL)
7434 abort ();
7435 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7436 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7437 }
7438 }
7439
7440 /* Set up .got offsets for local syms, and space for local dynamic
7441 relocs. */
7442 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7443 {
7444 struct got_entry **lgot_ents;
7445 struct got_entry **end_lgot_ents;
7446 char *lgot_masks;
7447 bfd_size_type locsymcount;
7448 Elf_Internal_Shdr *symtab_hdr;
7449 asection *srel;
7450
7451 if (!is_ppc64_elf_target (ibfd->xvec))
7452 continue;
7453
7454 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7455 {
7456 s = ppc64_elf_tdata (ibfd)->got;
7457 ppc64_tlsld_got (ibfd)->offset = s->size;
7458 s->size += 16;
7459 if (info->shared)
7460 {
7461 srel = ppc64_elf_tdata (ibfd)->relgot;
7462 srel->size += sizeof (Elf64_External_Rela);
7463 }
7464 }
7465 else
7466 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7467
7468 for (s = ibfd->sections; s != NULL; s = s->next)
7469 {
7470 struct ppc_dyn_relocs *p;
7471
7472 for (p = *((struct ppc_dyn_relocs **)
7473 &elf_section_data (s)->local_dynrel);
7474 p != NULL;
7475 p = p->next)
7476 {
7477 if (!bfd_is_abs_section (p->sec)
7478 && bfd_is_abs_section (p->sec->output_section))
7479 {
7480 /* Input section has been discarded, either because
7481 it is a copy of a linkonce section or due to
7482 linker script /DISCARD/, so we'll be discarding
7483 the relocs too. */
7484 }
7485 else if (p->count != 0)
7486 {
7487 srel = elf_section_data (p->sec)->sreloc;
7488 srel->size += p->count * sizeof (Elf64_External_Rela);
7489 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7490 info->flags |= DF_TEXTREL;
7491 }
7492 }
7493 }
7494
7495 lgot_ents = elf_local_got_ents (ibfd);
7496 if (!lgot_ents)
7497 continue;
7498
7499 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7500 locsymcount = symtab_hdr->sh_info;
7501 end_lgot_ents = lgot_ents + locsymcount;
7502 lgot_masks = (char *) end_lgot_ents;
7503 s = ppc64_elf_tdata (ibfd)->got;
7504 srel = ppc64_elf_tdata (ibfd)->relgot;
7505 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7506 {
7507 struct got_entry *ent;
7508
7509 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7510 if (ent->got.refcount > 0)
7511 {
7512 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7513 {
7514 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7515 {
7516 ppc64_tlsld_got (ibfd)->offset = s->size;
7517 s->size += 16;
7518 if (info->shared)
7519 srel->size += sizeof (Elf64_External_Rela);
7520 }
7521 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7522 }
7523 else
7524 {
7525 ent->got.offset = s->size;
7526 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7527 {
7528 s->size += 16;
7529 if (info->shared)
7530 srel->size += 2 * sizeof (Elf64_External_Rela);
7531 }
7532 else
7533 {
7534 s->size += 8;
7535 if (info->shared)
7536 srel->size += sizeof (Elf64_External_Rela);
7537 }
7538 }
7539 }
7540 else
7541 ent->got.offset = (bfd_vma) -1;
7542 }
7543 }
7544
7545 /* Allocate global sym .plt and .got entries, and space for global
7546 sym dynamic relocs. */
7547 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7548
7549 /* We now have determined the sizes of the various dynamic sections.
7550 Allocate memory for them. */
7551 relocs = FALSE;
7552 for (s = dynobj->sections; s != NULL; s = s->next)
7553 {
7554 if ((s->flags & SEC_LINKER_CREATED) == 0)
7555 continue;
7556
7557 if (s == htab->brlt || s == htab->relbrlt)
7558 /* These haven't been allocated yet; don't strip. */
7559 continue;
7560 else if (s == htab->got
7561 || s == htab->plt
7562 || s == htab->glink)
7563 {
7564 /* Strip this section if we don't need it; see the
7565 comment below. */
7566 }
7567 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7568 {
7569 if (s->size == 0)
7570 {
7571 /* If we don't need this section, strip it from the
7572 output file. This is mostly to handle .rela.bss and
7573 .rela.plt. We must create both sections in
7574 create_dynamic_sections, because they must be created
7575 before the linker maps input sections to output
7576 sections. The linker does that before
7577 adjust_dynamic_symbol is called, and it is that
7578 function which decides whether anything needs to go
7579 into these sections. */
7580 }
7581 else
7582 {
7583 if (s != htab->relplt)
7584 relocs = TRUE;
7585
7586 /* We use the reloc_count field as a counter if we need
7587 to copy relocs into the output file. */
7588 s->reloc_count = 0;
7589 }
7590 }
7591 else
7592 {
7593 /* It's not one of our sections, so don't allocate space. */
7594 continue;
7595 }
7596
7597 if (s->size == 0)
7598 {
7599 _bfd_strip_section_from_output (info, s);
7600 continue;
7601 }
7602
7603 /* .plt is in the bss section. We don't initialise it. */
7604 if (s == htab->plt)
7605 continue;
7606
7607 /* Allocate memory for the section contents. We use bfd_zalloc
7608 here in case unused entries are not reclaimed before the
7609 section's contents are written out. This should not happen,
7610 but this way if it does we get a R_PPC64_NONE reloc in .rela
7611 sections instead of garbage.
7612 We also rely on the section contents being zero when writing
7613 the GOT. */
7614 s->contents = bfd_zalloc (dynobj, s->size);
7615 if (s->contents == NULL)
7616 return FALSE;
7617 }
7618
7619 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7620 {
7621 if (!is_ppc64_elf_target (ibfd->xvec))
7622 continue;
7623
7624 s = ppc64_elf_tdata (ibfd)->got;
7625 if (s != NULL && s != htab->got)
7626 {
7627 if (s->size == 0)
7628 _bfd_strip_section_from_output (info, s);
7629 else
7630 {
7631 s->contents = bfd_zalloc (ibfd, s->size);
7632 if (s->contents == NULL)
7633 return FALSE;
7634 }
7635 }
7636 s = ppc64_elf_tdata (ibfd)->relgot;
7637 if (s != NULL)
7638 {
7639 if (s->size == 0)
7640 _bfd_strip_section_from_output (info, s);
7641 else
7642 {
7643 s->contents = bfd_zalloc (ibfd, s->size);
7644 if (s->contents == NULL)
7645 return FALSE;
7646 relocs = TRUE;
7647 s->reloc_count = 0;
7648 }
7649 }
7650 }
7651
7652 if (htab->elf.dynamic_sections_created)
7653 {
7654 /* Add some entries to the .dynamic section. We fill in the
7655 values later, in ppc64_elf_finish_dynamic_sections, but we
7656 must add the entries now so that we get the correct size for
7657 the .dynamic section. The DT_DEBUG entry is filled in by the
7658 dynamic linker and used by the debugger. */
7659 #define add_dynamic_entry(TAG, VAL) \
7660 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7661
7662 if (info->executable)
7663 {
7664 if (!add_dynamic_entry (DT_DEBUG, 0))
7665 return FALSE;
7666 }
7667
7668 if (htab->plt != NULL && htab->plt->size != 0)
7669 {
7670 if (!add_dynamic_entry (DT_PLTGOT, 0)
7671 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7672 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7673 || !add_dynamic_entry (DT_JMPREL, 0)
7674 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7675 return FALSE;
7676 }
7677
7678 if (NO_OPD_RELOCS)
7679 {
7680 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7681 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7682 return FALSE;
7683 }
7684
7685 if (relocs)
7686 {
7687 if (!add_dynamic_entry (DT_RELA, 0)
7688 || !add_dynamic_entry (DT_RELASZ, 0)
7689 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7690 return FALSE;
7691
7692 /* If any dynamic relocs apply to a read-only section,
7693 then we need a DT_TEXTREL entry. */
7694 if ((info->flags & DF_TEXTREL) == 0)
7695 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7696
7697 if ((info->flags & DF_TEXTREL) != 0)
7698 {
7699 if (!add_dynamic_entry (DT_TEXTREL, 0))
7700 return FALSE;
7701 }
7702 }
7703 }
7704 #undef add_dynamic_entry
7705
7706 return TRUE;
7707 }
7708
7709 /* Determine the type of stub needed, if any, for a call. */
7710
7711 static inline enum ppc_stub_type
7712 ppc_type_of_stub (asection *input_sec,
7713 const Elf_Internal_Rela *rel,
7714 struct ppc_link_hash_entry **hash,
7715 bfd_vma destination)
7716 {
7717 struct ppc_link_hash_entry *h = *hash;
7718 bfd_vma location;
7719 bfd_vma branch_offset;
7720 bfd_vma max_branch_offset;
7721 enum elf_ppc64_reloc_type r_type;
7722
7723 if (h != NULL)
7724 {
7725 if (h->oh != NULL
7726 && h->oh->is_func_descriptor)
7727 h = h->oh;
7728
7729 if (h->elf.dynindx != -1)
7730 {
7731 struct plt_entry *ent;
7732
7733 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7734 if (ent->addend == rel->r_addend
7735 && ent->plt.offset != (bfd_vma) -1)
7736 {
7737 *hash = h;
7738 return ppc_stub_plt_call;
7739 }
7740 }
7741
7742 if (!(h->elf.root.type == bfd_link_hash_defined
7743 || h->elf.root.type == bfd_link_hash_defweak)
7744 || h->elf.root.u.def.section->output_section == NULL)
7745 return ppc_stub_none;
7746 }
7747
7748 /* Determine where the call point is. */
7749 location = (input_sec->output_offset
7750 + input_sec->output_section->vma
7751 + rel->r_offset);
7752
7753 branch_offset = destination - location;
7754 r_type = ELF64_R_TYPE (rel->r_info);
7755
7756 /* Determine if a long branch stub is needed. */
7757 max_branch_offset = 1 << 25;
7758 if (r_type != R_PPC64_REL24)
7759 max_branch_offset = 1 << 15;
7760
7761 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7762 /* We need a stub. Figure out whether a long_branch or plt_branch
7763 is needed later. */
7764 return ppc_stub_long_branch;
7765
7766 return ppc_stub_none;
7767 }
7768
7769 /* Build a .plt call stub. */
7770
7771 static inline bfd_byte *
7772 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7773 {
7774 #define PPC_LO(v) ((v) & 0xffff)
7775 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7776 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7777
7778 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7779 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7780 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7781 if (PPC_HA (offset + 8) != PPC_HA (offset))
7782 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7783 offset += 8;
7784 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7785 if (PPC_HA (offset + 8) != PPC_HA (offset))
7786 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7787 offset += 8;
7788 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7789 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7790 bfd_put_32 (obfd, BCTR, p), p += 4;
7791 return p;
7792 }
7793
7794 static bfd_boolean
7795 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7796 {
7797 struct ppc_stub_hash_entry *stub_entry;
7798 struct ppc_branch_hash_entry *br_entry;
7799 struct bfd_link_info *info;
7800 struct ppc_link_hash_table *htab;
7801 bfd_byte *loc;
7802 bfd_byte *p;
7803 unsigned int indx;
7804 struct plt_entry *ent;
7805 bfd_vma dest, off;
7806 int size;
7807
7808 /* Massage our args to the form they really have. */
7809 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7810 info = in_arg;
7811
7812 htab = ppc_hash_table (info);
7813
7814 /* Make a note of the offset within the stubs for this entry. */
7815 stub_entry->stub_offset = stub_entry->stub_sec->size;
7816 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7817
7818 htab->stub_count[stub_entry->stub_type - 1] += 1;
7819 switch (stub_entry->stub_type)
7820 {
7821 case ppc_stub_long_branch:
7822 case ppc_stub_long_branch_r2off:
7823 /* Branches are relative. This is where we are going to. */
7824 off = dest = (stub_entry->target_value
7825 + stub_entry->target_section->output_offset
7826 + stub_entry->target_section->output_section->vma);
7827
7828 /* And this is where we are coming from. */
7829 off -= (stub_entry->stub_offset
7830 + stub_entry->stub_sec->output_offset
7831 + stub_entry->stub_sec->output_section->vma);
7832
7833 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7834 size = 4;
7835 else
7836 {
7837 bfd_vma r2off;
7838
7839 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7840 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7841 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7842 loc += 4;
7843 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7844 loc += 4;
7845 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7846 loc += 4;
7847 off -= 12;
7848 size = 16;
7849 }
7850 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7851
7852 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7853
7854 if (info->emitrelocations)
7855 {
7856 Elf_Internal_Rela *relocs, *r;
7857 struct bfd_elf_section_data *elfsec_data;
7858
7859 elfsec_data = elf_section_data (stub_entry->stub_sec);
7860 relocs = elfsec_data->relocs;
7861 if (relocs == NULL)
7862 {
7863 bfd_size_type relsize;
7864 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7865 relocs = bfd_alloc (htab->stub_bfd, relsize);
7866 if (relocs == NULL)
7867 return FALSE;
7868 elfsec_data->relocs = relocs;
7869 elfsec_data->rel_hdr.sh_size = relsize;
7870 elfsec_data->rel_hdr.sh_entsize = 24;
7871 stub_entry->stub_sec->reloc_count = 0;
7872 }
7873 r = relocs + stub_entry->stub_sec->reloc_count;
7874 stub_entry->stub_sec->reloc_count += 1;
7875 r->r_offset = loc - stub_entry->stub_sec->contents;
7876 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7877 r->r_addend = dest;
7878 if (stub_entry->h != NULL)
7879 {
7880 struct elf_link_hash_entry **hashes;
7881 unsigned long symndx;
7882 struct ppc_link_hash_entry *h;
7883
7884 hashes = elf_sym_hashes (htab->stub_bfd);
7885 if (hashes == NULL)
7886 {
7887 bfd_size_type hsize;
7888
7889 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7890 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7891 if (hashes == NULL)
7892 return FALSE;
7893 elf_sym_hashes (htab->stub_bfd) = hashes;
7894 htab->stub_globals = 1;
7895 }
7896 symndx = htab->stub_globals++;
7897 h = stub_entry->h;
7898 hashes[symndx] = &h->elf;
7899 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7900 if (h->oh != NULL && h->oh->is_func)
7901 h = h->oh;
7902 if (h->elf.root.u.def.section != stub_entry->target_section)
7903 /* H is an opd symbol. The addend must be zero. */
7904 r->r_addend = 0;
7905 else
7906 {
7907 off = (h->elf.root.u.def.value
7908 + h->elf.root.u.def.section->output_offset
7909 + h->elf.root.u.def.section->output_section->vma);
7910 r->r_addend -= off;
7911 }
7912 }
7913 }
7914 break;
7915
7916 case ppc_stub_plt_branch:
7917 case ppc_stub_plt_branch_r2off:
7918 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7919 stub_entry->root.string + 9,
7920 FALSE, FALSE);
7921 if (br_entry == NULL)
7922 {
7923 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7924 stub_entry->root.string + 9);
7925 htab->stub_error = TRUE;
7926 return FALSE;
7927 }
7928
7929 off = (stub_entry->target_value
7930 + stub_entry->target_section->output_offset
7931 + stub_entry->target_section->output_section->vma);
7932
7933 bfd_put_64 (htab->brlt->owner, off,
7934 htab->brlt->contents + br_entry->offset);
7935
7936 if (htab->relbrlt != NULL)
7937 {
7938 /* Create a reloc for the branch lookup table entry. */
7939 Elf_Internal_Rela rela;
7940 bfd_byte *rl;
7941
7942 rela.r_offset = (br_entry->offset
7943 + htab->brlt->output_offset
7944 + htab->brlt->output_section->vma);
7945 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7946 rela.r_addend = off;
7947
7948 rl = htab->relbrlt->contents;
7949 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7950 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7951 }
7952
7953 off = (br_entry->offset
7954 + htab->brlt->output_offset
7955 + htab->brlt->output_section->vma
7956 - elf_gp (htab->brlt->output_section->owner)
7957 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7958
7959 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7960 {
7961 (*_bfd_error_handler)
7962 (_("linkage table error against `%s'"),
7963 stub_entry->root.string);
7964 bfd_set_error (bfd_error_bad_value);
7965 htab->stub_error = TRUE;
7966 return FALSE;
7967 }
7968
7969 indx = off;
7970 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7971 {
7972 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7973 loc += 4;
7974 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7975 size = 16;
7976 }
7977 else
7978 {
7979 bfd_vma r2off;
7980
7981 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7982 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7983 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7984 loc += 4;
7985 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7986 loc += 4;
7987 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7988 loc += 4;
7989 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7990 loc += 4;
7991 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7992 size = 28;
7993 }
7994 loc += 4;
7995 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7996 loc += 4;
7997 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7998 break;
7999
8000 case ppc_stub_plt_call:
8001 /* Do the best we can for shared libraries built without
8002 exporting ".foo" for each "foo". This can happen when symbol
8003 versioning scripts strip all bar a subset of symbols. */
8004 if (stub_entry->h->oh != NULL
8005 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8006 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8007 {
8008 /* Point the symbol at the stub. There may be multiple stubs,
8009 we don't really care; The main thing is to make this sym
8010 defined somewhere. Maybe defining the symbol in the stub
8011 section is a silly idea. If we didn't do this, htab->top_id
8012 could disappear. */
8013 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8014 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8015 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8016 }
8017
8018 /* Now build the stub. */
8019 off = (bfd_vma) -1;
8020 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8021 if (ent->addend == stub_entry->addend)
8022 {
8023 off = ent->plt.offset;
8024 break;
8025 }
8026 if (off >= (bfd_vma) -2)
8027 abort ();
8028
8029 off &= ~ (bfd_vma) 1;
8030 off += (htab->plt->output_offset
8031 + htab->plt->output_section->vma
8032 - elf_gp (htab->plt->output_section->owner)
8033 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8034
8035 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8036 {
8037 (*_bfd_error_handler)
8038 (_("linkage table error against `%s'"),
8039 stub_entry->h->elf.root.root.string);
8040 bfd_set_error (bfd_error_bad_value);
8041 htab->stub_error = TRUE;
8042 return FALSE;
8043 }
8044
8045 p = build_plt_stub (htab->stub_bfd, loc, off);
8046 size = p - loc;
8047 break;
8048
8049 default:
8050 BFD_FAIL ();
8051 return FALSE;
8052 }
8053
8054 stub_entry->stub_sec->size += size;
8055
8056 if (htab->emit_stub_syms)
8057 {
8058 struct elf_link_hash_entry *h;
8059 size_t len1, len2;
8060 char *name;
8061 const char *const stub_str[] = { "long_branch",
8062 "long_branch_r2off",
8063 "plt_branch",
8064 "plt_branch_r2off",
8065 "plt_call" };
8066
8067 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8068 len2 = strlen (stub_entry->root.string);
8069 name = bfd_malloc (len1 + len2 + 2);
8070 if (name == NULL)
8071 return FALSE;
8072 memcpy (name, stub_entry->root.string, 9);
8073 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8074 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8075 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8076 if (h == NULL)
8077 return FALSE;
8078 if (h->root.type == bfd_link_hash_new)
8079 {
8080 h->root.type = bfd_link_hash_defined;
8081 h->root.u.def.section = stub_entry->stub_sec;
8082 h->root.u.def.value = stub_entry->stub_offset;
8083 h->ref_regular = 1;
8084 h->def_regular = 1;
8085 h->ref_regular_nonweak = 1;
8086 h->forced_local = 1;
8087 h->non_elf = 0;
8088 }
8089 }
8090
8091 return TRUE;
8092 }
8093
8094 /* As above, but don't actually build the stub. Just bump offset so
8095 we know stub section sizes, and select plt_branch stubs where
8096 long_branch stubs won't do. */
8097
8098 static bfd_boolean
8099 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8100 {
8101 struct ppc_stub_hash_entry *stub_entry;
8102 struct bfd_link_info *info;
8103 struct ppc_link_hash_table *htab;
8104 bfd_vma off;
8105 int size;
8106
8107 /* Massage our args to the form they really have. */
8108 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8109 info = in_arg;
8110
8111 htab = ppc_hash_table (info);
8112
8113 if (stub_entry->stub_type == ppc_stub_plt_call)
8114 {
8115 struct plt_entry *ent;
8116 off = (bfd_vma) -1;
8117 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8118 if (ent->addend == stub_entry->addend)
8119 {
8120 off = ent->plt.offset & ~(bfd_vma) 1;
8121 break;
8122 }
8123 if (off >= (bfd_vma) -2)
8124 abort ();
8125 off += (htab->plt->output_offset
8126 + htab->plt->output_section->vma
8127 - elf_gp (htab->plt->output_section->owner)
8128 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8129
8130 size = PLT_CALL_STUB_SIZE;
8131 if (PPC_HA (off + 16) != PPC_HA (off))
8132 size += 4;
8133 }
8134 else
8135 {
8136 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8137 variants. */
8138 off = (stub_entry->target_value
8139 + stub_entry->target_section->output_offset
8140 + stub_entry->target_section->output_section->vma);
8141 off -= (stub_entry->stub_sec->size
8142 + stub_entry->stub_sec->output_offset
8143 + stub_entry->stub_sec->output_section->vma);
8144
8145 /* Reset the stub type from the plt variant in case we now
8146 can reach with a shorter stub. */
8147 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8148 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8149
8150 size = 4;
8151 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8152 {
8153 off -= 12;
8154 size = 16;
8155 }
8156
8157 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8158 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8159 {
8160 struct ppc_branch_hash_entry *br_entry;
8161
8162 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8163 stub_entry->root.string + 9,
8164 TRUE, FALSE);
8165 if (br_entry == NULL)
8166 {
8167 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8168 stub_entry->root.string + 9);
8169 htab->stub_error = TRUE;
8170 return FALSE;
8171 }
8172
8173 if (br_entry->iter != htab->stub_iteration)
8174 {
8175 br_entry->iter = htab->stub_iteration;
8176 br_entry->offset = htab->brlt->size;
8177 htab->brlt->size += 8;
8178
8179 if (htab->relbrlt != NULL)
8180 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8181 }
8182
8183 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8184 size = 16;
8185 if (stub_entry->stub_type != ppc_stub_plt_branch)
8186 size = 28;
8187 }
8188
8189 if (info->emitrelocations
8190 && (stub_entry->stub_type == ppc_stub_long_branch
8191 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8192 stub_entry->stub_sec->reloc_count += 1;
8193 }
8194
8195 stub_entry->stub_sec->size += size;
8196 return TRUE;
8197 }
8198
8199 /* Set up various things so that we can make a list of input sections
8200 for each output section included in the link. Returns -1 on error,
8201 0 when no stubs will be needed, and 1 on success. */
8202
8203 int
8204 ppc64_elf_setup_section_lists (bfd *output_bfd,
8205 struct bfd_link_info *info,
8206 int no_multi_toc)
8207 {
8208 bfd *input_bfd;
8209 int top_id, top_index, id;
8210 asection *section;
8211 asection **input_list;
8212 bfd_size_type amt;
8213 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8214
8215 htab->no_multi_toc = no_multi_toc;
8216
8217 if (htab->brlt == NULL)
8218 return 0;
8219
8220 /* Find the top input section id. */
8221 for (input_bfd = info->input_bfds, top_id = 3;
8222 input_bfd != NULL;
8223 input_bfd = input_bfd->link_next)
8224 {
8225 for (section = input_bfd->sections;
8226 section != NULL;
8227 section = section->next)
8228 {
8229 if (top_id < section->id)
8230 top_id = section->id;
8231 }
8232 }
8233
8234 htab->top_id = top_id;
8235 amt = sizeof (struct map_stub) * (top_id + 1);
8236 htab->stub_group = bfd_zmalloc (amt);
8237 if (htab->stub_group == NULL)
8238 return -1;
8239
8240 /* Set toc_off for com, und, abs and ind sections. */
8241 for (id = 0; id < 3; id++)
8242 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8243
8244 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8245
8246 /* We can't use output_bfd->section_count here to find the top output
8247 section index as some sections may have been removed, and
8248 _bfd_strip_section_from_output doesn't renumber the indices. */
8249 for (section = output_bfd->sections, top_index = 0;
8250 section != NULL;
8251 section = section->next)
8252 {
8253 if (top_index < section->index)
8254 top_index = section->index;
8255 }
8256
8257 htab->top_index = top_index;
8258 amt = sizeof (asection *) * (top_index + 1);
8259 input_list = bfd_zmalloc (amt);
8260 htab->input_list = input_list;
8261 if (input_list == NULL)
8262 return -1;
8263
8264 return 1;
8265 }
8266
8267 /* The linker repeatedly calls this function for each TOC input section
8268 and linker generated GOT section. Group input bfds such that the toc
8269 within a group is less than 64k in size. Will break with cute linker
8270 scripts that play games with dot in the output toc section. */
8271
8272 void
8273 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8274 {
8275 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8276
8277 if (!htab->no_multi_toc)
8278 {
8279 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8280 bfd_vma off = addr - htab->toc_curr;
8281
8282 if (off + isec->size > 0x10000)
8283 htab->toc_curr = addr;
8284
8285 elf_gp (isec->owner) = (htab->toc_curr
8286 - elf_gp (isec->output_section->owner)
8287 + TOC_BASE_OFF);
8288 }
8289 }
8290
8291 /* Called after the last call to the above function. */
8292
8293 void
8294 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8295 {
8296 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8297
8298 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8299
8300 /* toc_curr tracks the TOC offset used for code sections below in
8301 ppc64_elf_next_input_section. Start off at 0x8000. */
8302 htab->toc_curr = TOC_BASE_OFF;
8303 }
8304
8305 /* No toc references were found in ISEC. If the code in ISEC makes no
8306 calls, then there's no need to use toc adjusting stubs when branching
8307 into ISEC. Actually, indirect calls from ISEC are OK as they will
8308 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8309 needed, and 2 if a cyclical call-graph was found but no other reason
8310 for a stub was detected. If called from the top level, a return of
8311 2 means the same as a return of 0. */
8312
8313 static int
8314 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8315 {
8316 Elf_Internal_Rela *relstart, *rel;
8317 Elf_Internal_Sym *local_syms;
8318 int ret;
8319 struct ppc_link_hash_table *htab;
8320
8321 /* We know none of our code bearing sections will need toc stubs. */
8322 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8323 return 0;
8324
8325 if (isec->size == 0)
8326 return 0;
8327
8328 if (isec->output_section == NULL)
8329 return 0;
8330
8331 /* Hack for linux kernel. .fixup contains branches, but only back to
8332 the function that hit an exception. */
8333 if (strcmp (isec->name, ".fixup") == 0)
8334 return 0;
8335
8336 if (isec->reloc_count == 0)
8337 return 0;
8338
8339 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8340 info->keep_memory);
8341 if (relstart == NULL)
8342 return -1;
8343
8344 /* Look for branches to outside of this section. */
8345 local_syms = NULL;
8346 ret = 0;
8347 htab = ppc_hash_table (info);
8348 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8349 {
8350 enum elf_ppc64_reloc_type r_type;
8351 unsigned long r_symndx;
8352 struct elf_link_hash_entry *h;
8353 Elf_Internal_Sym *sym;
8354 asection *sym_sec;
8355 long *opd_adjust;
8356 bfd_vma sym_value;
8357 bfd_vma dest;
8358
8359 r_type = ELF64_R_TYPE (rel->r_info);
8360 if (r_type != R_PPC64_REL24
8361 && r_type != R_PPC64_REL14
8362 && r_type != R_PPC64_REL14_BRTAKEN
8363 && r_type != R_PPC64_REL14_BRNTAKEN)
8364 continue;
8365
8366 r_symndx = ELF64_R_SYM (rel->r_info);
8367 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8368 isec->owner))
8369 {
8370 ret = -1;
8371 break;
8372 }
8373
8374 /* Calls to dynamic lib functions go through a plt call stub
8375 that uses r2. Branches to undefined symbols might be a call
8376 using old-style dot symbols that can be satisfied by a plt
8377 call into a new-style dynamic library. */
8378 if (sym_sec == NULL)
8379 {
8380 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8381 if (eh != NULL
8382 && eh->oh != NULL
8383 && eh->oh->elf.plt.plist != NULL)
8384 {
8385 ret = 1;
8386 break;
8387 }
8388
8389 /* Ignore other undefined symbols. */
8390 continue;
8391 }
8392
8393 /* Assume branches to other sections not included in the link need
8394 stubs too, to cover -R and absolute syms. */
8395 if (sym_sec->output_section == NULL)
8396 {
8397 ret = 1;
8398 break;
8399 }
8400
8401 if (h == NULL)
8402 sym_value = sym->st_value;
8403 else
8404 {
8405 if (h->root.type != bfd_link_hash_defined
8406 && h->root.type != bfd_link_hash_defweak)
8407 abort ();
8408 sym_value = h->root.u.def.value;
8409 }
8410 sym_value += rel->r_addend;
8411
8412 /* If this branch reloc uses an opd sym, find the code section. */
8413 opd_adjust = get_opd_info (sym_sec);
8414 if (opd_adjust != NULL)
8415 {
8416 if (h == NULL)
8417 {
8418 long adjust;
8419
8420 adjust = opd_adjust[sym->st_value / 8];
8421 if (adjust == -1)
8422 /* Assume deleted functions won't ever be called. */
8423 continue;
8424 sym_value += adjust;
8425 }
8426
8427 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8428 if (dest == (bfd_vma) -1)
8429 continue;
8430 }
8431 else
8432 dest = (sym_value
8433 + sym_sec->output_offset
8434 + sym_sec->output_section->vma);
8435
8436 /* Ignore branch to self. */
8437 if (sym_sec == isec)
8438 continue;
8439
8440 /* If the called function uses the toc, we need a stub. */
8441 if (sym_sec->has_toc_reloc
8442 || sym_sec->makes_toc_func_call)
8443 {
8444 ret = 1;
8445 break;
8446 }
8447
8448 /* Assume any branch that needs a long branch stub might in fact
8449 need a plt_branch stub. A plt_branch stub uses r2. */
8450 else if (dest - (isec->output_offset
8451 + isec->output_section->vma
8452 + rel->r_offset) + (1 << 25) >= (2 << 25))
8453 {
8454 ret = 1;
8455 break;
8456 }
8457
8458 /* If calling back to a section in the process of being tested, we
8459 can't say for sure that no toc adjusting stubs are needed, so
8460 don't return zero. */
8461 else if (sym_sec->call_check_in_progress)
8462 ret = 2;
8463
8464 /* Branches to another section that itself doesn't have any TOC
8465 references are OK. Recursively call ourselves to check. */
8466 else if (sym_sec->id <= htab->top_id
8467 && htab->stub_group[sym_sec->id].toc_off == 0)
8468 {
8469 int recur;
8470
8471 /* Mark current section as indeterminate, so that other
8472 sections that call back to current won't be marked as
8473 known. */
8474 isec->call_check_in_progress = 1;
8475 recur = toc_adjusting_stub_needed (info, sym_sec);
8476 isec->call_check_in_progress = 0;
8477
8478 if (recur < 0)
8479 {
8480 /* An error. Exit. */
8481 ret = -1;
8482 break;
8483 }
8484 else if (recur <= 1)
8485 {
8486 /* Known result. Mark as checked and set section flag. */
8487 htab->stub_group[sym_sec->id].toc_off = 1;
8488 if (recur != 0)
8489 {
8490 sym_sec->makes_toc_func_call = 1;
8491 ret = 1;
8492 break;
8493 }
8494 }
8495 else
8496 {
8497 /* Unknown result. Continue checking. */
8498 ret = 2;
8499 }
8500 }
8501 }
8502
8503 if (local_syms != NULL
8504 && (elf_tdata (isec->owner)->symtab_hdr.contents
8505 != (unsigned char *) local_syms))
8506 free (local_syms);
8507 if (elf_section_data (isec)->relocs != relstart)
8508 free (relstart);
8509
8510 return ret;
8511 }
8512
8513 /* The linker repeatedly calls this function for each input section,
8514 in the order that input sections are linked into output sections.
8515 Build lists of input sections to determine groupings between which
8516 we may insert linker stubs. */
8517
8518 bfd_boolean
8519 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8520 {
8521 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8522
8523 if ((isec->output_section->flags & SEC_CODE) != 0
8524 && isec->output_section->index <= htab->top_index)
8525 {
8526 asection **list = htab->input_list + isec->output_section->index;
8527 /* Steal the link_sec pointer for our list. */
8528 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8529 /* This happens to make the list in reverse order,
8530 which is what we want. */
8531 PREV_SEC (isec) = *list;
8532 *list = isec;
8533 }
8534
8535 if (htab->multi_toc_needed)
8536 {
8537 /* If a code section has a function that uses the TOC then we need
8538 to use the right TOC (obviously). Also, make sure that .opd gets
8539 the correct TOC value for R_PPC64_TOC relocs that don't have or
8540 can't find their function symbol (shouldn't ever happen now). */
8541 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8542 {
8543 if (elf_gp (isec->owner) != 0)
8544 htab->toc_curr = elf_gp (isec->owner);
8545 }
8546 else if (htab->stub_group[isec->id].toc_off == 0)
8547 {
8548 int ret = toc_adjusting_stub_needed (info, isec);
8549 if (ret < 0)
8550 return FALSE;
8551 else
8552 isec->makes_toc_func_call = ret & 1;
8553 }
8554 }
8555
8556 /* Functions that don't use the TOC can belong in any TOC group.
8557 Use the last TOC base. This happens to make _init and _fini
8558 pasting work. */
8559 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8560 return TRUE;
8561 }
8562
8563 /* See whether we can group stub sections together. Grouping stub
8564 sections may result in fewer stubs. More importantly, we need to
8565 put all .init* and .fini* stubs at the beginning of the .init or
8566 .fini output sections respectively, because glibc splits the
8567 _init and _fini functions into multiple parts. Putting a stub in
8568 the middle of a function is not a good idea. */
8569
8570 static void
8571 group_sections (struct ppc_link_hash_table *htab,
8572 bfd_size_type stub_group_size,
8573 bfd_boolean stubs_always_before_branch)
8574 {
8575 asection **list = htab->input_list + htab->top_index;
8576 do
8577 {
8578 asection *tail = *list;
8579 while (tail != NULL)
8580 {
8581 asection *curr;
8582 asection *prev;
8583 bfd_size_type total;
8584 bfd_boolean big_sec;
8585 bfd_vma curr_toc;
8586
8587 curr = tail;
8588 total = tail->size;
8589 big_sec = total >= stub_group_size;
8590 curr_toc = htab->stub_group[tail->id].toc_off;
8591
8592 while ((prev = PREV_SEC (curr)) != NULL
8593 && ((total += curr->output_offset - prev->output_offset)
8594 < stub_group_size)
8595 && htab->stub_group[prev->id].toc_off == curr_toc)
8596 curr = prev;
8597
8598 /* OK, the size from the start of CURR to the end is less
8599 than stub_group_size and thus can be handled by one stub
8600 section. (or the tail section is itself larger than
8601 stub_group_size, in which case we may be toast.) We
8602 should really be keeping track of the total size of stubs
8603 added here, as stubs contribute to the final output
8604 section size. That's a little tricky, and this way will
8605 only break if stubs added make the total size more than
8606 2^25, ie. for the default stub_group_size, if stubs total
8607 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8608 do
8609 {
8610 prev = PREV_SEC (tail);
8611 /* Set up this stub group. */
8612 htab->stub_group[tail->id].link_sec = curr;
8613 }
8614 while (tail != curr && (tail = prev) != NULL);
8615
8616 /* But wait, there's more! Input sections up to stub_group_size
8617 bytes before the stub section can be handled by it too.
8618 Don't do this if we have a really large section after the
8619 stubs, as adding more stubs increases the chance that
8620 branches may not reach into the stub section. */
8621 if (!stubs_always_before_branch && !big_sec)
8622 {
8623 total = 0;
8624 while (prev != NULL
8625 && ((total += tail->output_offset - prev->output_offset)
8626 < stub_group_size)
8627 && htab->stub_group[prev->id].toc_off == curr_toc)
8628 {
8629 tail = prev;
8630 prev = PREV_SEC (tail);
8631 htab->stub_group[tail->id].link_sec = curr;
8632 }
8633 }
8634 tail = prev;
8635 }
8636 }
8637 while (list-- != htab->input_list);
8638 free (htab->input_list);
8639 #undef PREV_SEC
8640 }
8641
8642 /* Determine and set the size of the stub section for a final link.
8643
8644 The basic idea here is to examine all the relocations looking for
8645 PC-relative calls to a target that is unreachable with a "bl"
8646 instruction. */
8647
8648 bfd_boolean
8649 ppc64_elf_size_stubs (bfd *output_bfd,
8650 struct bfd_link_info *info,
8651 bfd_signed_vma group_size,
8652 asection *(*add_stub_section) (const char *, asection *),
8653 void (*layout_sections_again) (void))
8654 {
8655 bfd_size_type stub_group_size;
8656 bfd_boolean stubs_always_before_branch;
8657 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8658
8659 /* Stash our params away. */
8660 htab->add_stub_section = add_stub_section;
8661 htab->layout_sections_again = layout_sections_again;
8662 stubs_always_before_branch = group_size < 0;
8663 if (group_size < 0)
8664 stub_group_size = -group_size;
8665 else
8666 stub_group_size = group_size;
8667 if (stub_group_size == 1)
8668 {
8669 /* Default values. */
8670 if (stubs_always_before_branch)
8671 {
8672 stub_group_size = 0x1e00000;
8673 if (htab->has_14bit_branch)
8674 stub_group_size = 0x7800;
8675 }
8676 else
8677 {
8678 stub_group_size = 0x1c00000;
8679 if (htab->has_14bit_branch)
8680 stub_group_size = 0x7000;
8681 }
8682 }
8683
8684 group_sections (htab, stub_group_size, stubs_always_before_branch);
8685
8686 while (1)
8687 {
8688 bfd *input_bfd;
8689 unsigned int bfd_indx;
8690 asection *stub_sec;
8691 bfd_boolean stub_changed;
8692
8693 htab->stub_iteration += 1;
8694 stub_changed = FALSE;
8695
8696 for (input_bfd = info->input_bfds, bfd_indx = 0;
8697 input_bfd != NULL;
8698 input_bfd = input_bfd->link_next, bfd_indx++)
8699 {
8700 Elf_Internal_Shdr *symtab_hdr;
8701 asection *section;
8702 Elf_Internal_Sym *local_syms = NULL;
8703
8704 /* We'll need the symbol table in a second. */
8705 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8706 if (symtab_hdr->sh_info == 0)
8707 continue;
8708
8709 /* Walk over each section attached to the input bfd. */
8710 for (section = input_bfd->sections;
8711 section != NULL;
8712 section = section->next)
8713 {
8714 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8715
8716 /* If there aren't any relocs, then there's nothing more
8717 to do. */
8718 if ((section->flags & SEC_RELOC) == 0
8719 || section->reloc_count == 0)
8720 continue;
8721
8722 /* If this section is a link-once section that will be
8723 discarded, then don't create any stubs. */
8724 if (section->output_section == NULL
8725 || section->output_section->owner != output_bfd)
8726 continue;
8727
8728 /* Get the relocs. */
8729 internal_relocs
8730 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8731 info->keep_memory);
8732 if (internal_relocs == NULL)
8733 goto error_ret_free_local;
8734
8735 /* Now examine each relocation. */
8736 irela = internal_relocs;
8737 irelaend = irela + section->reloc_count;
8738 for (; irela < irelaend; irela++)
8739 {
8740 enum elf_ppc64_reloc_type r_type;
8741 unsigned int r_indx;
8742 enum ppc_stub_type stub_type;
8743 struct ppc_stub_hash_entry *stub_entry;
8744 asection *sym_sec, *code_sec;
8745 bfd_vma sym_value;
8746 bfd_vma destination;
8747 bfd_boolean ok_dest;
8748 struct ppc_link_hash_entry *hash;
8749 struct ppc_link_hash_entry *fdh;
8750 struct elf_link_hash_entry *h;
8751 Elf_Internal_Sym *sym;
8752 char *stub_name;
8753 const asection *id_sec;
8754 long *opd_adjust;
8755
8756 r_type = ELF64_R_TYPE (irela->r_info);
8757 r_indx = ELF64_R_SYM (irela->r_info);
8758
8759 if (r_type >= R_PPC64_max)
8760 {
8761 bfd_set_error (bfd_error_bad_value);
8762 goto error_ret_free_internal;
8763 }
8764
8765 /* Only look for stubs on branch instructions. */
8766 if (r_type != R_PPC64_REL24
8767 && r_type != R_PPC64_REL14
8768 && r_type != R_PPC64_REL14_BRTAKEN
8769 && r_type != R_PPC64_REL14_BRNTAKEN)
8770 continue;
8771
8772 /* Now determine the call target, its name, value,
8773 section. */
8774 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8775 r_indx, input_bfd))
8776 goto error_ret_free_internal;
8777 hash = (struct ppc_link_hash_entry *) h;
8778
8779 ok_dest = FALSE;
8780 fdh = NULL;
8781 if (hash == NULL)
8782 {
8783 sym_value = sym->st_value;
8784 ok_dest = TRUE;
8785 }
8786 else
8787 {
8788 sym_value = 0;
8789 /* Recognise an old ABI func code entry sym, and
8790 use the func descriptor sym instead. */
8791 if (hash->elf.root.root.string[0] == '.'
8792 && (fdh = get_fdh (hash, htab)) != NULL)
8793 {
8794 if (fdh->elf.root.type == bfd_link_hash_defined
8795 || fdh->elf.root.type == bfd_link_hash_defweak)
8796 {
8797 sym_sec = fdh->elf.root.u.def.section;
8798 sym_value = fdh->elf.root.u.def.value;
8799 if (sym_sec->output_section != NULL)
8800 ok_dest = TRUE;
8801 }
8802 else
8803 fdh = NULL;
8804 }
8805 else if (hash->elf.root.type == bfd_link_hash_defined
8806 || hash->elf.root.type == bfd_link_hash_defweak)
8807 {
8808 sym_value = hash->elf.root.u.def.value;
8809 if (sym_sec->output_section != NULL)
8810 ok_dest = TRUE;
8811 }
8812 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8813 ;
8814 else if (hash->elf.root.type == bfd_link_hash_undefined)
8815 ;
8816 else
8817 {
8818 bfd_set_error (bfd_error_bad_value);
8819 goto error_ret_free_internal;
8820 }
8821 }
8822
8823 destination = 0;
8824 if (ok_dest)
8825 {
8826 sym_value += irela->r_addend;
8827 destination = (sym_value
8828 + sym_sec->output_offset
8829 + sym_sec->output_section->vma);
8830 }
8831
8832 code_sec = sym_sec;
8833 opd_adjust = get_opd_info (sym_sec);
8834 if (opd_adjust != NULL)
8835 {
8836 bfd_vma dest;
8837
8838 if (hash == NULL)
8839 {
8840 long adjust = opd_adjust[sym_value / 8];
8841 if (adjust == -1)
8842 continue;
8843 sym_value += adjust;
8844 }
8845 dest = opd_entry_value (sym_sec, sym_value,
8846 &code_sec, &sym_value);
8847 if (dest != (bfd_vma) -1)
8848 {
8849 destination = dest;
8850 if (fdh != NULL)
8851 {
8852 /* Fixup old ABI sym to point at code
8853 entry. */
8854 hash->elf.root.type = bfd_link_hash_defweak;
8855 hash->elf.root.u.def.section = code_sec;
8856 hash->elf.root.u.def.value = sym_value;
8857 }
8858 }
8859 }
8860
8861 /* Determine what (if any) linker stub is needed. */
8862 stub_type = ppc_type_of_stub (section, irela, &hash,
8863 destination);
8864
8865 if (stub_type != ppc_stub_plt_call)
8866 {
8867 /* Check whether we need a TOC adjusting stub.
8868 Since the linker pastes together pieces from
8869 different object files when creating the
8870 _init and _fini functions, it may be that a
8871 call to what looks like a local sym is in
8872 fact a call needing a TOC adjustment. */
8873 if (code_sec != NULL
8874 && code_sec->output_section != NULL
8875 && (htab->stub_group[code_sec->id].toc_off
8876 != htab->stub_group[section->id].toc_off)
8877 && (code_sec->has_toc_reloc
8878 || code_sec->makes_toc_func_call))
8879 stub_type = ppc_stub_long_branch_r2off;
8880 }
8881
8882 if (stub_type == ppc_stub_none)
8883 continue;
8884
8885 /* __tls_get_addr calls might be eliminated. */
8886 if (stub_type != ppc_stub_plt_call
8887 && hash != NULL
8888 && (hash == htab->tls_get_addr
8889 || hash == htab->tls_get_addr_fd)
8890 && section->has_tls_reloc
8891 && irela != internal_relocs)
8892 {
8893 /* Get tls info. */
8894 char *tls_mask;
8895
8896 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8897 irela - 1, input_bfd))
8898 goto error_ret_free_internal;
8899 if (*tls_mask != 0)
8900 continue;
8901 }
8902
8903 /* Support for grouping stub sections. */
8904 id_sec = htab->stub_group[section->id].link_sec;
8905
8906 /* Get the name of this stub. */
8907 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8908 if (!stub_name)
8909 goto error_ret_free_internal;
8910
8911 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8912 stub_name, FALSE, FALSE);
8913 if (stub_entry != NULL)
8914 {
8915 /* The proper stub has already been created. */
8916 free (stub_name);
8917 continue;
8918 }
8919
8920 stub_entry = ppc_add_stub (stub_name, section, htab);
8921 if (stub_entry == NULL)
8922 {
8923 free (stub_name);
8924 error_ret_free_internal:
8925 if (elf_section_data (section)->relocs == NULL)
8926 free (internal_relocs);
8927 error_ret_free_local:
8928 if (local_syms != NULL
8929 && (symtab_hdr->contents
8930 != (unsigned char *) local_syms))
8931 free (local_syms);
8932 return FALSE;
8933 }
8934
8935 stub_entry->stub_type = stub_type;
8936 stub_entry->target_value = sym_value;
8937 stub_entry->target_section = code_sec;
8938 stub_entry->h = hash;
8939 stub_entry->addend = irela->r_addend;
8940
8941 if (stub_entry->h != NULL)
8942 htab->stub_globals += 1;
8943
8944 stub_changed = TRUE;
8945 }
8946
8947 /* We're done with the internal relocs, free them. */
8948 if (elf_section_data (section)->relocs != internal_relocs)
8949 free (internal_relocs);
8950 }
8951
8952 if (local_syms != NULL
8953 && symtab_hdr->contents != (unsigned char *) local_syms)
8954 {
8955 if (!info->keep_memory)
8956 free (local_syms);
8957 else
8958 symtab_hdr->contents = (unsigned char *) local_syms;
8959 }
8960 }
8961
8962 if (!stub_changed)
8963 break;
8964
8965 /* OK, we've added some stubs. Find out the new size of the
8966 stub sections. */
8967 for (stub_sec = htab->stub_bfd->sections;
8968 stub_sec != NULL;
8969 stub_sec = stub_sec->next)
8970 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8971 {
8972 stub_sec->size = 0;
8973 stub_sec->reloc_count = 0;
8974 }
8975
8976 htab->brlt->size = 0;
8977 if (htab->relbrlt != NULL)
8978 htab->relbrlt->size = 0;
8979
8980 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8981
8982 /* Ask the linker to do its stuff. */
8983 (*htab->layout_sections_again) ();
8984 }
8985
8986 /* It would be nice to strip .branch_lt from the output if the
8987 section is empty, but it's too late. If we strip sections here,
8988 the dynamic symbol table is corrupted since the section symbol
8989 for the stripped section isn't written. */
8990
8991 return TRUE;
8992 }
8993
8994 /* Called after we have determined section placement. If sections
8995 move, we'll be called again. Provide a value for TOCstart. */
8996
8997 bfd_vma
8998 ppc64_elf_toc (bfd *obfd)
8999 {
9000 asection *s;
9001 bfd_vma TOCstart;
9002
9003 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9004 order. The TOC starts where the first of these sections starts. */
9005 s = bfd_get_section_by_name (obfd, ".got");
9006 if (s == NULL)
9007 s = bfd_get_section_by_name (obfd, ".toc");
9008 if (s == NULL)
9009 s = bfd_get_section_by_name (obfd, ".tocbss");
9010 if (s == NULL)
9011 s = bfd_get_section_by_name (obfd, ".plt");
9012 if (s == NULL)
9013 {
9014 /* This may happen for
9015 o references to TOC base (SYM@toc / TOC[tc0]) without a
9016 .toc directive
9017 o bad linker script
9018 o --gc-sections and empty TOC sections
9019
9020 FIXME: Warn user? */
9021
9022 /* Look for a likely section. We probably won't even be
9023 using TOCstart. */
9024 for (s = obfd->sections; s != NULL; s = s->next)
9025 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9026 == (SEC_ALLOC | SEC_SMALL_DATA))
9027 break;
9028 if (s == NULL)
9029 for (s = obfd->sections; s != NULL; s = s->next)
9030 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9031 == (SEC_ALLOC | SEC_SMALL_DATA))
9032 break;
9033 if (s == NULL)
9034 for (s = obfd->sections; s != NULL; s = s->next)
9035 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9036 break;
9037 if (s == NULL)
9038 for (s = obfd->sections; s != NULL; s = s->next)
9039 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9040 break;
9041 }
9042
9043 TOCstart = 0;
9044 if (s != NULL)
9045 TOCstart = s->output_section->vma + s->output_offset;
9046
9047 return TOCstart;
9048 }
9049
9050 /* Build all the stubs associated with the current output file.
9051 The stubs are kept in a hash table attached to the main linker
9052 hash table. This function is called via gldelf64ppc_finish. */
9053
9054 bfd_boolean
9055 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9056 struct bfd_link_info *info,
9057 char **stats)
9058 {
9059 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9060 asection *stub_sec;
9061 bfd_byte *p;
9062 int stub_sec_count = 0;
9063
9064 htab->emit_stub_syms = emit_stub_syms;
9065
9066 /* Allocate memory to hold the linker stubs. */
9067 for (stub_sec = htab->stub_bfd->sections;
9068 stub_sec != NULL;
9069 stub_sec = stub_sec->next)
9070 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9071 && stub_sec->size != 0)
9072 {
9073 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9074 if (stub_sec->contents == NULL)
9075 return FALSE;
9076 /* We want to check that built size is the same as calculated
9077 size. rawsize is a convenient location to use. */
9078 stub_sec->rawsize = stub_sec->size;
9079 stub_sec->size = 0;
9080 }
9081
9082 if (htab->plt != NULL)
9083 {
9084 unsigned int indx;
9085 bfd_vma plt0;
9086
9087 /* Build the .glink plt call stub. */
9088 plt0 = (htab->plt->output_section->vma
9089 + htab->plt->output_offset
9090 - (htab->glink->output_section->vma
9091 + htab->glink->output_offset
9092 + GLINK_CALL_STUB_SIZE));
9093 if (plt0 + 0x80008000 > 0xffffffff)
9094 {
9095 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9096 bfd_set_error (bfd_error_bad_value);
9097 return FALSE;
9098 }
9099
9100 if (htab->emit_stub_syms)
9101 {
9102 struct elf_link_hash_entry *h;
9103 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9104 if (h == NULL)
9105 return FALSE;
9106 if (h->root.type == bfd_link_hash_new)
9107 {
9108 h->root.type = bfd_link_hash_defined;
9109 h->root.u.def.section = htab->glink;
9110 h->root.u.def.value = 0;
9111 h->ref_regular = 1;
9112 h->def_regular = 1;
9113 h->ref_regular_nonweak = 1;
9114 h->forced_local = 1;
9115 h->non_elf = 0;
9116 }
9117 }
9118 p = htab->glink->contents;
9119 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9120 p += 4;
9121 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9122 p += 4;
9123 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9124 p += 4;
9125 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9126 p += 4;
9127 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9128 p += 4;
9129 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9130 p += 4;
9131 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9132 p += 4;
9133 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9134 p += 4;
9135 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9136 p += 4;
9137 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9138 p += 4;
9139 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9140 p += 4;
9141 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9142 p += 4;
9143 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9144 p += 4;
9145 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9146 p += 4;
9147 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9148 p += 4;
9149 bfd_put_32 (htab->glink->owner, BCTR, p);
9150 p += 4;
9151
9152 /* Build the .glink lazy link call stubs. */
9153 indx = 0;
9154 while (p < htab->glink->contents + htab->glink->size)
9155 {
9156 if (indx < 0x8000)
9157 {
9158 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9159 p += 4;
9160 }
9161 else
9162 {
9163 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9164 p += 4;
9165 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9166 p += 4;
9167 }
9168 bfd_put_32 (htab->glink->owner,
9169 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9170 indx++;
9171 p += 4;
9172 }
9173 htab->glink->rawsize = p - htab->glink->contents;
9174 }
9175
9176 if (htab->brlt->size != 0)
9177 {
9178 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9179 htab->brlt->size);
9180 if (htab->brlt->contents == NULL)
9181 return FALSE;
9182 }
9183 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9184 {
9185 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9186 htab->relbrlt->size);
9187 if (htab->relbrlt->contents == NULL)
9188 return FALSE;
9189 }
9190
9191 /* Build the stubs as directed by the stub hash table. */
9192 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9193
9194 for (stub_sec = htab->stub_bfd->sections;
9195 stub_sec != NULL;
9196 stub_sec = stub_sec->next)
9197 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9198 {
9199 stub_sec_count += 1;
9200 if (stub_sec->rawsize != stub_sec->size)
9201 break;
9202 }
9203
9204 if (stub_sec != NULL
9205 || htab->glink->rawsize != htab->glink->size)
9206 {
9207 htab->stub_error = TRUE;
9208 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9209 }
9210
9211 if (htab->stub_error)
9212 return FALSE;
9213
9214 if (stats != NULL)
9215 {
9216 *stats = bfd_malloc (500);
9217 if (*stats == NULL)
9218 return FALSE;
9219
9220 sprintf (*stats, _("linker stubs in %u group%s\n"
9221 " branch %lu\n"
9222 " toc adjust %lu\n"
9223 " long branch %lu\n"
9224 " long toc adj %lu\n"
9225 " plt call %lu"),
9226 stub_sec_count,
9227 stub_sec_count == 1 ? "" : "s",
9228 htab->stub_count[ppc_stub_long_branch - 1],
9229 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9230 htab->stub_count[ppc_stub_plt_branch - 1],
9231 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9232 htab->stub_count[ppc_stub_plt_call - 1]);
9233 }
9234 return TRUE;
9235 }
9236
9237 /* This function undoes the changes made by add_symbol_adjust. */
9238
9239 static bfd_boolean
9240 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9241 {
9242 struct ppc_link_hash_entry *eh;
9243
9244 if (h->root.type == bfd_link_hash_indirect)
9245 return TRUE;
9246
9247 if (h->root.type == bfd_link_hash_warning)
9248 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9249
9250 eh = (struct ppc_link_hash_entry *) h;
9251 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9252 return TRUE;
9253
9254 eh->elf.root.type = bfd_link_hash_undefined;
9255 return TRUE;
9256 }
9257
9258 void
9259 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9260 {
9261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9262 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9263 }
9264
9265 /* The RELOCATE_SECTION function is called by the ELF backend linker
9266 to handle the relocations for a section.
9267
9268 The relocs are always passed as Rela structures; if the section
9269 actually uses Rel structures, the r_addend field will always be
9270 zero.
9271
9272 This function is responsible for adjust the section contents as
9273 necessary, and (if using Rela relocs and generating a
9274 relocatable output file) adjusting the reloc addend as
9275 necessary.
9276
9277 This function does not have to worry about setting the reloc
9278 address or the reloc symbol index.
9279
9280 LOCAL_SYMS is a pointer to the swapped in local symbols.
9281
9282 LOCAL_SECTIONS is an array giving the section in the input file
9283 corresponding to the st_shndx field of each local symbol.
9284
9285 The global hash table entry for the global symbols can be found
9286 via elf_sym_hashes (input_bfd).
9287
9288 When generating relocatable output, this function must handle
9289 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9290 going to be the section symbol corresponding to the output
9291 section, which means that the addend must be adjusted
9292 accordingly. */
9293
9294 static bfd_boolean
9295 ppc64_elf_relocate_section (bfd *output_bfd,
9296 struct bfd_link_info *info,
9297 bfd *input_bfd,
9298 asection *input_section,
9299 bfd_byte *contents,
9300 Elf_Internal_Rela *relocs,
9301 Elf_Internal_Sym *local_syms,
9302 asection **local_sections)
9303 {
9304 struct ppc_link_hash_table *htab;
9305 Elf_Internal_Shdr *symtab_hdr;
9306 struct elf_link_hash_entry **sym_hashes;
9307 Elf_Internal_Rela *rel;
9308 Elf_Internal_Rela *relend;
9309 Elf_Internal_Rela outrel;
9310 bfd_byte *loc;
9311 struct got_entry **local_got_ents;
9312 bfd_vma TOCstart;
9313 bfd_boolean ret = TRUE;
9314 bfd_boolean is_opd;
9315 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9316 bfd_boolean is_power4 = FALSE;
9317
9318 if (info->relocatable)
9319 return TRUE;
9320
9321 /* Initialize howto table if needed. */
9322 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9323 ppc_howto_init ();
9324
9325 htab = ppc_hash_table (info);
9326
9327 /* Don't relocate stub sections. */
9328 if (input_section->owner == htab->stub_bfd)
9329 return TRUE;
9330
9331 local_got_ents = elf_local_got_ents (input_bfd);
9332 TOCstart = elf_gp (output_bfd);
9333 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9334 sym_hashes = elf_sym_hashes (input_bfd);
9335 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9336
9337 rel = relocs;
9338 relend = relocs + input_section->reloc_count;
9339 for (; rel < relend; rel++)
9340 {
9341 enum elf_ppc64_reloc_type r_type;
9342 bfd_vma addend;
9343 bfd_reloc_status_type r;
9344 Elf_Internal_Sym *sym;
9345 asection *sec;
9346 struct elf_link_hash_entry *h_elf;
9347 struct ppc_link_hash_entry *h;
9348 struct ppc_link_hash_entry *fdh;
9349 const char *sym_name;
9350 unsigned long r_symndx, toc_symndx;
9351 char tls_mask, tls_gd, tls_type;
9352 char sym_type;
9353 bfd_vma relocation;
9354 bfd_boolean unresolved_reloc;
9355 bfd_boolean warned;
9356 unsigned long insn, mask;
9357 struct ppc_stub_hash_entry *stub_entry;
9358 bfd_vma max_br_offset;
9359 bfd_vma from;
9360
9361 r_type = ELF64_R_TYPE (rel->r_info);
9362 r_symndx = ELF64_R_SYM (rel->r_info);
9363
9364 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9365 symbol of the previous ADDR64 reloc. The symbol gives us the
9366 proper TOC base to use. */
9367 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9368 && rel != relocs
9369 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9370 && is_opd)
9371 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9372
9373 sym = NULL;
9374 sec = NULL;
9375 h_elf = NULL;
9376 sym_name = NULL;
9377 unresolved_reloc = FALSE;
9378 warned = FALSE;
9379
9380 if (r_symndx < symtab_hdr->sh_info)
9381 {
9382 /* It's a local symbol. */
9383 long *opd_adjust;
9384
9385 sym = local_syms + r_symndx;
9386 sec = local_sections[r_symndx];
9387 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
9388 sym_type = ELF64_ST_TYPE (sym->st_info);
9389 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9390 opd_adjust = get_opd_info (sec);
9391 if (opd_adjust != NULL)
9392 {
9393 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9394 if (adjust == -1)
9395 relocation = 0;
9396 else
9397 relocation += adjust;
9398 }
9399 }
9400 else
9401 {
9402 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9403 r_symndx, symtab_hdr, sym_hashes,
9404 h_elf, sec, relocation,
9405 unresolved_reloc, warned);
9406 sym_name = h_elf->root.root.string;
9407 sym_type = h_elf->type;
9408 }
9409 h = (struct ppc_link_hash_entry *) h_elf;
9410
9411 /* TLS optimizations. Replace instruction sequences and relocs
9412 based on information we collected in tls_optimize. We edit
9413 RELOCS so that --emit-relocs will output something sensible
9414 for the final instruction stream. */
9415 tls_mask = 0;
9416 tls_gd = 0;
9417 toc_symndx = 0;
9418 if (IS_PPC64_TLS_RELOC (r_type))
9419 {
9420 if (h != NULL)
9421 tls_mask = h->tls_mask;
9422 else if (local_got_ents != NULL)
9423 {
9424 char *lgot_masks;
9425 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9426 tls_mask = lgot_masks[r_symndx];
9427 }
9428 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9429 {
9430 /* Check for toc tls entries. */
9431 char *toc_tls;
9432
9433 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9434 rel, input_bfd))
9435 return FALSE;
9436
9437 if (toc_tls)
9438 tls_mask = *toc_tls;
9439 }
9440 }
9441
9442 /* Check that tls relocs are used with tls syms, and non-tls
9443 relocs are used with non-tls syms. */
9444 if (r_symndx != 0
9445 && r_type != R_PPC64_NONE
9446 && (h == NULL
9447 || h->elf.root.type == bfd_link_hash_defined
9448 || h->elf.root.type == bfd_link_hash_defweak)
9449 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9450 {
9451 if (r_type == R_PPC64_TLS && tls_mask != 0)
9452 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9453 ;
9454 else
9455 (*_bfd_error_handler)
9456 (sym_type == STT_TLS
9457 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9458 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9459 input_bfd,
9460 input_section,
9461 (long) rel->r_offset,
9462 ppc64_elf_howto_table[r_type]->name,
9463 sym_name);
9464 }
9465
9466 /* Ensure reloc mapping code below stays sane. */
9467 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9468 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9469 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9470 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9471 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9472 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9473 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9474 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9475 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9476 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9477 abort ();
9478
9479 switch (r_type)
9480 {
9481 default:
9482 break;
9483
9484 case R_PPC64_TOC16:
9485 case R_PPC64_TOC16_LO:
9486 case R_PPC64_TOC16_DS:
9487 case R_PPC64_TOC16_LO_DS:
9488 {
9489 /* Check for toc tls entries. */
9490 char *toc_tls;
9491 int retval;
9492
9493 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9494 rel, input_bfd);
9495 if (retval == 0)
9496 return FALSE;
9497
9498 if (toc_tls)
9499 {
9500 tls_mask = *toc_tls;
9501 if (r_type == R_PPC64_TOC16_DS
9502 || r_type == R_PPC64_TOC16_LO_DS)
9503 {
9504 if (tls_mask != 0
9505 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9506 goto toctprel;
9507 }
9508 else
9509 {
9510 /* If we found a GD reloc pair, then we might be
9511 doing a GD->IE transition. */
9512 if (retval == 2)
9513 {
9514 tls_gd = TLS_TPRELGD;
9515 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9516 goto tls_get_addr_check;
9517 }
9518 else if (retval == 3)
9519 {
9520 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9521 goto tls_get_addr_check;
9522 }
9523 }
9524 }
9525 }
9526 break;
9527
9528 case R_PPC64_GOT_TPREL16_DS:
9529 case R_PPC64_GOT_TPREL16_LO_DS:
9530 if (tls_mask != 0
9531 && (tls_mask & TLS_TPREL) == 0)
9532 {
9533 toctprel:
9534 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9535 insn &= 31 << 21;
9536 insn |= 0x3c0d0000; /* addis 0,13,0 */
9537 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9538 r_type = R_PPC64_TPREL16_HA;
9539 if (toc_symndx != 0)
9540 {
9541 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9542 /* We changed the symbol. Start over in order to
9543 get h, sym, sec etc. right. */
9544 rel--;
9545 continue;
9546 }
9547 else
9548 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9549 }
9550 break;
9551
9552 case R_PPC64_TLS:
9553 if (tls_mask != 0
9554 && (tls_mask & TLS_TPREL) == 0)
9555 {
9556 bfd_vma rtra;
9557 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9558 if ((insn & ((0x3f << 26) | (31 << 11)))
9559 == ((31 << 26) | (13 << 11)))
9560 rtra = insn & ((1 << 26) - (1 << 16));
9561 else if ((insn & ((0x3f << 26) | (31 << 16)))
9562 == ((31 << 26) | (13 << 16)))
9563 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9564 else
9565 abort ();
9566 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9567 /* add -> addi. */
9568 insn = 14 << 26;
9569 else if ((insn & (31 << 1)) == 23 << 1
9570 && ((insn & (31 << 6)) < 14 << 6
9571 || ((insn & (31 << 6)) >= 16 << 6
9572 && (insn & (31 << 6)) < 24 << 6)))
9573 /* load and store indexed -> dform. */
9574 insn = (32 | ((insn >> 6) & 31)) << 26;
9575 else if ((insn & (31 << 1)) == 21 << 1
9576 && (insn & (0x1a << 6)) == 0)
9577 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9578 insn = (((58 | ((insn >> 6) & 4)) << 26)
9579 | ((insn >> 6) & 1));
9580 else if ((insn & (31 << 1)) == 21 << 1
9581 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9582 /* lwax -> lwa. */
9583 insn = (58 << 26) | 2;
9584 else
9585 abort ();
9586 insn |= rtra;
9587 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9588 /* Was PPC64_TLS which sits on insn boundary, now
9589 PPC64_TPREL16_LO which is at insn+2. */
9590 rel->r_offset += 2;
9591 r_type = R_PPC64_TPREL16_LO;
9592 if (toc_symndx != 0)
9593 {
9594 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9595 /* We changed the symbol. Start over in order to
9596 get h, sym, sec etc. right. */
9597 rel--;
9598 continue;
9599 }
9600 else
9601 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9602 }
9603 break;
9604
9605 case R_PPC64_GOT_TLSGD16_HI:
9606 case R_PPC64_GOT_TLSGD16_HA:
9607 tls_gd = TLS_TPRELGD;
9608 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9609 goto tls_gdld_hi;
9610 break;
9611
9612 case R_PPC64_GOT_TLSLD16_HI:
9613 case R_PPC64_GOT_TLSLD16_HA:
9614 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9615 {
9616 tls_gdld_hi:
9617 if ((tls_mask & tls_gd) != 0)
9618 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9619 + R_PPC64_GOT_TPREL16_DS);
9620 else
9621 {
9622 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9623 rel->r_offset -= 2;
9624 r_type = R_PPC64_NONE;
9625 }
9626 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9627 }
9628 break;
9629
9630 case R_PPC64_GOT_TLSGD16:
9631 case R_PPC64_GOT_TLSGD16_LO:
9632 tls_gd = TLS_TPRELGD;
9633 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9634 goto tls_get_addr_check;
9635 break;
9636
9637 case R_PPC64_GOT_TLSLD16:
9638 case R_PPC64_GOT_TLSLD16_LO:
9639 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9640 {
9641 tls_get_addr_check:
9642 if (rel + 1 < relend)
9643 {
9644 enum elf_ppc64_reloc_type r_type2;
9645 unsigned long r_symndx2;
9646 struct elf_link_hash_entry *h2;
9647 bfd_vma insn1, insn2, insn3;
9648 bfd_vma offset;
9649
9650 /* The next instruction should be a call to
9651 __tls_get_addr. Peek at the reloc to be sure. */
9652 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9653 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9654 if (r_symndx2 < symtab_hdr->sh_info
9655 || (r_type2 != R_PPC64_REL14
9656 && r_type2 != R_PPC64_REL14_BRTAKEN
9657 && r_type2 != R_PPC64_REL14_BRNTAKEN
9658 && r_type2 != R_PPC64_REL24))
9659 break;
9660
9661 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9662 while (h2->root.type == bfd_link_hash_indirect
9663 || h2->root.type == bfd_link_hash_warning)
9664 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9665 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9666 && h2 != &htab->tls_get_addr_fd->elf))
9667 break;
9668
9669 /* OK, it checks out. Replace the call. */
9670 offset = rel[1].r_offset;
9671 insn1 = bfd_get_32 (output_bfd,
9672 contents + rel->r_offset - 2);
9673 insn3 = bfd_get_32 (output_bfd,
9674 contents + offset + 4);
9675 if ((tls_mask & tls_gd) != 0)
9676 {
9677 /* IE */
9678 insn1 &= (1 << 26) - (1 << 2);
9679 insn1 |= 58 << 26; /* ld */
9680 insn2 = 0x7c636a14; /* add 3,3,13 */
9681 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9682 if ((tls_mask & TLS_EXPLICIT) == 0)
9683 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9684 + R_PPC64_GOT_TPREL16_DS);
9685 else
9686 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9687 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9688 }
9689 else
9690 {
9691 /* LE */
9692 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9693 insn2 = 0x38630000; /* addi 3,3,0 */
9694 if (tls_gd == 0)
9695 {
9696 /* Was an LD reloc. */
9697 r_symndx = 0;
9698 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9699 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9700 }
9701 else if (toc_symndx != 0)
9702 r_symndx = toc_symndx;
9703 r_type = R_PPC64_TPREL16_HA;
9704 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9705 rel[1].r_info = ELF64_R_INFO (r_symndx,
9706 R_PPC64_TPREL16_LO);
9707 rel[1].r_offset += 2;
9708 }
9709 if (insn3 == NOP
9710 || insn3 == CROR_151515 || insn3 == CROR_313131)
9711 {
9712 insn3 = insn2;
9713 insn2 = NOP;
9714 rel[1].r_offset += 4;
9715 }
9716 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9717 bfd_put_32 (output_bfd, insn2, contents + offset);
9718 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9719 if (tls_gd == 0 || toc_symndx != 0)
9720 {
9721 /* We changed the symbol. Start over in order
9722 to get h, sym, sec etc. right. */
9723 rel--;
9724 continue;
9725 }
9726 }
9727 }
9728 break;
9729
9730 case R_PPC64_DTPMOD64:
9731 if (rel + 1 < relend
9732 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9733 && rel[1].r_offset == rel->r_offset + 8)
9734 {
9735 if ((tls_mask & TLS_GD) == 0)
9736 {
9737 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9738 if ((tls_mask & TLS_TPRELGD) != 0)
9739 r_type = R_PPC64_TPREL64;
9740 else
9741 {
9742 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9743 r_type = R_PPC64_NONE;
9744 }
9745 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9746 }
9747 }
9748 else
9749 {
9750 if ((tls_mask & TLS_LD) == 0)
9751 {
9752 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9753 r_type = R_PPC64_NONE;
9754 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9755 }
9756 }
9757 break;
9758
9759 case R_PPC64_TPREL64:
9760 if ((tls_mask & TLS_TPREL) == 0)
9761 {
9762 r_type = R_PPC64_NONE;
9763 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9764 }
9765 break;
9766 }
9767
9768 /* Handle other relocations that tweak non-addend part of insn. */
9769 insn = 0;
9770 max_br_offset = 1 << 25;
9771 addend = rel->r_addend;
9772 switch (r_type)
9773 {
9774 default:
9775 break;
9776
9777 /* Branch taken prediction relocations. */
9778 case R_PPC64_ADDR14_BRTAKEN:
9779 case R_PPC64_REL14_BRTAKEN:
9780 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9781 /* Fall thru. */
9782
9783 /* Branch not taken prediction relocations. */
9784 case R_PPC64_ADDR14_BRNTAKEN:
9785 case R_PPC64_REL14_BRNTAKEN:
9786 insn |= bfd_get_32 (output_bfd,
9787 contents + rel->r_offset) & ~(0x01 << 21);
9788 /* Fall thru. */
9789
9790 case R_PPC64_REL14:
9791 max_br_offset = 1 << 15;
9792 /* Fall thru. */
9793
9794 case R_PPC64_REL24:
9795 /* Calls to functions with a different TOC, such as calls to
9796 shared objects, need to alter the TOC pointer. This is
9797 done using a linkage stub. A REL24 branching to these
9798 linkage stubs needs to be followed by a nop, as the nop
9799 will be replaced with an instruction to restore the TOC
9800 base pointer. */
9801 stub_entry = NULL;
9802 fdh = h;
9803 if (((h != NULL
9804 && (((fdh = h->oh) != NULL
9805 && fdh->elf.plt.plist != NULL)
9806 || (fdh = h)->elf.plt.plist != NULL))
9807 || (sec != NULL
9808 && sec->output_section != NULL
9809 && sec->id <= htab->top_id
9810 && (htab->stub_group[sec->id].toc_off
9811 != htab->stub_group[input_section->id].toc_off)))
9812 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9813 rel, htab)) != NULL
9814 && (stub_entry->stub_type == ppc_stub_plt_call
9815 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9816 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9817 {
9818 bfd_boolean can_plt_call = FALSE;
9819
9820 if (rel->r_offset + 8 <= input_section->size)
9821 {
9822 unsigned long nop;
9823 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9824 if (nop == NOP
9825 || nop == CROR_151515 || nop == CROR_313131)
9826 {
9827 bfd_put_32 (input_bfd, LD_R2_40R1,
9828 contents + rel->r_offset + 4);
9829 can_plt_call = TRUE;
9830 }
9831 }
9832
9833 if (!can_plt_call)
9834 {
9835 if (stub_entry->stub_type == ppc_stub_plt_call)
9836 {
9837 /* If this is a plain branch rather than a branch
9838 and link, don't require a nop. */
9839 unsigned long br;
9840 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9841 if ((br & 1) == 0)
9842 can_plt_call = TRUE;
9843 }
9844 else if (h != NULL
9845 && strcmp (h->elf.root.root.string,
9846 ".__libc_start_main") == 0)
9847 {
9848 /* Allow crt1 branch to go via a toc adjusting stub. */
9849 can_plt_call = TRUE;
9850 }
9851 else
9852 {
9853 if (strcmp (input_section->output_section->name,
9854 ".init") == 0
9855 || strcmp (input_section->output_section->name,
9856 ".fini") == 0)
9857 (*_bfd_error_handler)
9858 (_("%B(%A+0x%lx): automatic multiple TOCs "
9859 "not supported using your crt files; "
9860 "recompile with -mminimal-toc or upgrade gcc"),
9861 input_bfd,
9862 input_section,
9863 (long) rel->r_offset);
9864 else
9865 (*_bfd_error_handler)
9866 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9867 "does not allow automatic multiple TOCs; "
9868 "recompile with -mminimal-toc or "
9869 "-fno-optimize-sibling-calls, "
9870 "or make `%s' extern"),
9871 input_bfd,
9872 input_section,
9873 (long) rel->r_offset,
9874 sym_name,
9875 sym_name);
9876 bfd_set_error (bfd_error_bad_value);
9877 ret = FALSE;
9878 }
9879 }
9880
9881 if (can_plt_call
9882 && stub_entry->stub_type == ppc_stub_plt_call)
9883 unresolved_reloc = FALSE;
9884 }
9885
9886 if (stub_entry == NULL
9887 && get_opd_info (sec) != NULL)
9888 {
9889 /* The branch destination is the value of the opd entry. */
9890 bfd_vma off = (relocation - sec->output_section->vma
9891 - sec->output_offset + rel->r_addend);
9892 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9893 if (dest != (bfd_vma) -1)
9894 {
9895 relocation = dest;
9896 addend = 0;
9897 }
9898 }
9899
9900 /* If the branch is out of reach we ought to have a long
9901 branch stub. */
9902 from = (rel->r_offset
9903 + input_section->output_offset
9904 + input_section->output_section->vma);
9905
9906 if (stub_entry == NULL
9907 && (relocation + rel->r_addend - from + max_br_offset
9908 >= 2 * max_br_offset)
9909 && r_type != R_PPC64_ADDR14_BRTAKEN
9910 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9911 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9912 htab);
9913
9914 if (stub_entry != NULL)
9915 {
9916 /* Munge up the value and addend so that we call the stub
9917 rather than the procedure directly. */
9918 relocation = (stub_entry->stub_offset
9919 + stub_entry->stub_sec->output_offset
9920 + stub_entry->stub_sec->output_section->vma);
9921 addend = 0;
9922 }
9923
9924 if (insn != 0)
9925 {
9926 if (is_power4)
9927 {
9928 /* Set 'a' bit. This is 0b00010 in BO field for branch
9929 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9930 for branch on CTR insns (BO == 1a00t or 1a01t). */
9931 if ((insn & (0x14 << 21)) == (0x04 << 21))
9932 insn |= 0x02 << 21;
9933 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9934 insn |= 0x08 << 21;
9935 else
9936 break;
9937 }
9938 else
9939 {
9940 /* Invert 'y' bit if not the default. */
9941 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9942 insn ^= 0x01 << 21;
9943 }
9944
9945 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9946 }
9947
9948 /* NOP out calls to undefined weak functions.
9949 We can thus call a weak function without first
9950 checking whether the function is defined. */
9951 else if (h != NULL
9952 && h->elf.root.type == bfd_link_hash_undefweak
9953 && r_type == R_PPC64_REL24
9954 && relocation == 0
9955 && rel->r_addend == 0)
9956 {
9957 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9958 continue;
9959 }
9960 break;
9961 }
9962
9963 /* Set `addend'. */
9964 tls_type = 0;
9965 switch (r_type)
9966 {
9967 default:
9968 (*_bfd_error_handler)
9969 (_("%B: unknown relocation type %d for symbol %s"),
9970 input_bfd, (int) r_type, sym_name);
9971
9972 bfd_set_error (bfd_error_bad_value);
9973 ret = FALSE;
9974 continue;
9975
9976 case R_PPC64_NONE:
9977 case R_PPC64_TLS:
9978 case R_PPC64_GNU_VTINHERIT:
9979 case R_PPC64_GNU_VTENTRY:
9980 continue;
9981
9982 /* GOT16 relocations. Like an ADDR16 using the symbol's
9983 address in the GOT as relocation value instead of the
9984 symbol's value itself. Also, create a GOT entry for the
9985 symbol and put the symbol value there. */
9986 case R_PPC64_GOT_TLSGD16:
9987 case R_PPC64_GOT_TLSGD16_LO:
9988 case R_PPC64_GOT_TLSGD16_HI:
9989 case R_PPC64_GOT_TLSGD16_HA:
9990 tls_type = TLS_TLS | TLS_GD;
9991 goto dogot;
9992
9993 case R_PPC64_GOT_TLSLD16:
9994 case R_PPC64_GOT_TLSLD16_LO:
9995 case R_PPC64_GOT_TLSLD16_HI:
9996 case R_PPC64_GOT_TLSLD16_HA:
9997 tls_type = TLS_TLS | TLS_LD;
9998 goto dogot;
9999
10000 case R_PPC64_GOT_TPREL16_DS:
10001 case R_PPC64_GOT_TPREL16_LO_DS:
10002 case R_PPC64_GOT_TPREL16_HI:
10003 case R_PPC64_GOT_TPREL16_HA:
10004 tls_type = TLS_TLS | TLS_TPREL;
10005 goto dogot;
10006
10007 case R_PPC64_GOT_DTPREL16_DS:
10008 case R_PPC64_GOT_DTPREL16_LO_DS:
10009 case R_PPC64_GOT_DTPREL16_HI:
10010 case R_PPC64_GOT_DTPREL16_HA:
10011 tls_type = TLS_TLS | TLS_DTPREL;
10012 goto dogot;
10013
10014 case R_PPC64_GOT16:
10015 case R_PPC64_GOT16_LO:
10016 case R_PPC64_GOT16_HI:
10017 case R_PPC64_GOT16_HA:
10018 case R_PPC64_GOT16_DS:
10019 case R_PPC64_GOT16_LO_DS:
10020 dogot:
10021 {
10022 /* Relocation is to the entry for this symbol in the global
10023 offset table. */
10024 asection *got;
10025 bfd_vma *offp;
10026 bfd_vma off;
10027 unsigned long indx = 0;
10028
10029 if (tls_type == (TLS_TLS | TLS_LD)
10030 && (h == NULL
10031 || !h->elf.def_dynamic))
10032 offp = &ppc64_tlsld_got (input_bfd)->offset;
10033 else
10034 {
10035 struct got_entry *ent;
10036
10037 if (h != NULL)
10038 {
10039 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10040 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10041 &h->elf)
10042 || (info->shared
10043 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10044 /* This is actually a static link, or it is a
10045 -Bsymbolic link and the symbol is defined
10046 locally, or the symbol was forced to be local
10047 because of a version file. */
10048 ;
10049 else
10050 {
10051 indx = h->elf.dynindx;
10052 unresolved_reloc = FALSE;
10053 }
10054 ent = h->elf.got.glist;
10055 }
10056 else
10057 {
10058 if (local_got_ents == NULL)
10059 abort ();
10060 ent = local_got_ents[r_symndx];
10061 }
10062
10063 for (; ent != NULL; ent = ent->next)
10064 if (ent->addend == rel->r_addend
10065 && ent->owner == input_bfd
10066 && ent->tls_type == tls_type)
10067 break;
10068 if (ent == NULL)
10069 abort ();
10070 offp = &ent->got.offset;
10071 }
10072
10073 got = ppc64_elf_tdata (input_bfd)->got;
10074 if (got == NULL)
10075 abort ();
10076
10077 /* The offset must always be a multiple of 8. We use the
10078 least significant bit to record whether we have already
10079 processed this entry. */
10080 off = *offp;
10081 if ((off & 1) != 0)
10082 off &= ~1;
10083 else
10084 {
10085 /* Generate relocs for the dynamic linker, except in
10086 the case of TLSLD where we'll use one entry per
10087 module. */
10088 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10089
10090 *offp = off | 1;
10091 if ((info->shared || indx != 0)
10092 && (h == NULL
10093 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10094 || h->elf.root.type != bfd_link_hash_undefweak))
10095 {
10096 outrel.r_offset = (got->output_section->vma
10097 + got->output_offset
10098 + off);
10099 outrel.r_addend = rel->r_addend;
10100 if (tls_type & (TLS_LD | TLS_GD))
10101 {
10102 outrel.r_addend = 0;
10103 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10104 if (tls_type == (TLS_TLS | TLS_GD))
10105 {
10106 loc = relgot->contents;
10107 loc += (relgot->reloc_count++
10108 * sizeof (Elf64_External_Rela));
10109 bfd_elf64_swap_reloca_out (output_bfd,
10110 &outrel, loc);
10111 outrel.r_offset += 8;
10112 outrel.r_addend = rel->r_addend;
10113 outrel.r_info
10114 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10115 }
10116 }
10117 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10118 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10119 else if (tls_type == (TLS_TLS | TLS_TPREL))
10120 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10121 else if (indx == 0)
10122 {
10123 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10124
10125 /* Write the .got section contents for the sake
10126 of prelink. */
10127 loc = got->contents + off;
10128 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10129 loc);
10130 }
10131 else
10132 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10133
10134 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10135 {
10136 outrel.r_addend += relocation;
10137 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10138 outrel.r_addend -= htab->elf.tls_sec->vma;
10139 }
10140 loc = relgot->contents;
10141 loc += (relgot->reloc_count++
10142 * sizeof (Elf64_External_Rela));
10143 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10144 }
10145
10146 /* Init the .got section contents here if we're not
10147 emitting a reloc. */
10148 else
10149 {
10150 relocation += rel->r_addend;
10151 if (tls_type == (TLS_TLS | TLS_LD))
10152 relocation = 1;
10153 else if (tls_type != 0)
10154 {
10155 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10156 if (tls_type == (TLS_TLS | TLS_TPREL))
10157 relocation += DTP_OFFSET - TP_OFFSET;
10158
10159 if (tls_type == (TLS_TLS | TLS_GD))
10160 {
10161 bfd_put_64 (output_bfd, relocation,
10162 got->contents + off + 8);
10163 relocation = 1;
10164 }
10165 }
10166
10167 bfd_put_64 (output_bfd, relocation,
10168 got->contents + off);
10169 }
10170 }
10171
10172 if (off >= (bfd_vma) -2)
10173 abort ();
10174
10175 relocation = got->output_offset + off;
10176
10177 /* TOC base (r2) is TOC start plus 0x8000. */
10178 addend = -TOC_BASE_OFF;
10179 }
10180 break;
10181
10182 case R_PPC64_PLT16_HA:
10183 case R_PPC64_PLT16_HI:
10184 case R_PPC64_PLT16_LO:
10185 case R_PPC64_PLT32:
10186 case R_PPC64_PLT64:
10187 /* Relocation is to the entry for this symbol in the
10188 procedure linkage table. */
10189
10190 /* Resolve a PLT reloc against a local symbol directly,
10191 without using the procedure linkage table. */
10192 if (h == NULL)
10193 break;
10194
10195 /* It's possible that we didn't make a PLT entry for this
10196 symbol. This happens when statically linking PIC code,
10197 or when using -Bsymbolic. Go find a match if there is a
10198 PLT entry. */
10199 if (htab->plt != NULL)
10200 {
10201 struct plt_entry *ent;
10202 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10203 if (ent->addend == rel->r_addend
10204 && ent->plt.offset != (bfd_vma) -1)
10205 {
10206 relocation = (htab->plt->output_section->vma
10207 + htab->plt->output_offset
10208 + ent->plt.offset);
10209 unresolved_reloc = FALSE;
10210 }
10211 }
10212 break;
10213
10214 case R_PPC64_TOC:
10215 /* Relocation value is TOC base. */
10216 relocation = TOCstart;
10217 if (r_symndx == 0)
10218 relocation += htab->stub_group[input_section->id].toc_off;
10219 else if (unresolved_reloc)
10220 ;
10221 else if (sec != NULL && sec->id <= htab->top_id)
10222 relocation += htab->stub_group[sec->id].toc_off;
10223 else
10224 unresolved_reloc = TRUE;
10225 goto dodyn2;
10226
10227 /* TOC16 relocs. We want the offset relative to the TOC base,
10228 which is the address of the start of the TOC plus 0x8000.
10229 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10230 in this order. */
10231 case R_PPC64_TOC16:
10232 case R_PPC64_TOC16_LO:
10233 case R_PPC64_TOC16_HI:
10234 case R_PPC64_TOC16_DS:
10235 case R_PPC64_TOC16_LO_DS:
10236 case R_PPC64_TOC16_HA:
10237 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10238 break;
10239
10240 /* Relocate against the beginning of the section. */
10241 case R_PPC64_SECTOFF:
10242 case R_PPC64_SECTOFF_LO:
10243 case R_PPC64_SECTOFF_HI:
10244 case R_PPC64_SECTOFF_DS:
10245 case R_PPC64_SECTOFF_LO_DS:
10246 case R_PPC64_SECTOFF_HA:
10247 if (sec != NULL)
10248 addend -= sec->output_section->vma;
10249 break;
10250
10251 case R_PPC64_REL14:
10252 case R_PPC64_REL14_BRNTAKEN:
10253 case R_PPC64_REL14_BRTAKEN:
10254 case R_PPC64_REL24:
10255 break;
10256
10257 case R_PPC64_TPREL16:
10258 case R_PPC64_TPREL16_LO:
10259 case R_PPC64_TPREL16_HI:
10260 case R_PPC64_TPREL16_HA:
10261 case R_PPC64_TPREL16_DS:
10262 case R_PPC64_TPREL16_LO_DS:
10263 case R_PPC64_TPREL16_HIGHER:
10264 case R_PPC64_TPREL16_HIGHERA:
10265 case R_PPC64_TPREL16_HIGHEST:
10266 case R_PPC64_TPREL16_HIGHESTA:
10267 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10268 if (info->shared)
10269 /* The TPREL16 relocs shouldn't really be used in shared
10270 libs as they will result in DT_TEXTREL being set, but
10271 support them anyway. */
10272 goto dodyn;
10273 break;
10274
10275 case R_PPC64_DTPREL16:
10276 case R_PPC64_DTPREL16_LO:
10277 case R_PPC64_DTPREL16_HI:
10278 case R_PPC64_DTPREL16_HA:
10279 case R_PPC64_DTPREL16_DS:
10280 case R_PPC64_DTPREL16_LO_DS:
10281 case R_PPC64_DTPREL16_HIGHER:
10282 case R_PPC64_DTPREL16_HIGHERA:
10283 case R_PPC64_DTPREL16_HIGHEST:
10284 case R_PPC64_DTPREL16_HIGHESTA:
10285 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10286 break;
10287
10288 case R_PPC64_DTPMOD64:
10289 relocation = 1;
10290 addend = 0;
10291 goto dodyn;
10292
10293 case R_PPC64_TPREL64:
10294 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10295 goto dodyn;
10296
10297 case R_PPC64_DTPREL64:
10298 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10299 /* Fall thru */
10300
10301 /* Relocations that may need to be propagated if this is a
10302 dynamic object. */
10303 case R_PPC64_REL30:
10304 case R_PPC64_REL32:
10305 case R_PPC64_REL64:
10306 case R_PPC64_ADDR14:
10307 case R_PPC64_ADDR14_BRNTAKEN:
10308 case R_PPC64_ADDR14_BRTAKEN:
10309 case R_PPC64_ADDR16:
10310 case R_PPC64_ADDR16_DS:
10311 case R_PPC64_ADDR16_HA:
10312 case R_PPC64_ADDR16_HI:
10313 case R_PPC64_ADDR16_HIGHER:
10314 case R_PPC64_ADDR16_HIGHERA:
10315 case R_PPC64_ADDR16_HIGHEST:
10316 case R_PPC64_ADDR16_HIGHESTA:
10317 case R_PPC64_ADDR16_LO:
10318 case R_PPC64_ADDR16_LO_DS:
10319 case R_PPC64_ADDR24:
10320 case R_PPC64_ADDR32:
10321 case R_PPC64_ADDR64:
10322 case R_PPC64_UADDR16:
10323 case R_PPC64_UADDR32:
10324 case R_PPC64_UADDR64:
10325 /* r_symndx will be zero only for relocs against symbols
10326 from removed linkonce sections, or sections discarded by
10327 a linker script. */
10328 dodyn:
10329 if (r_symndx == 0)
10330 break;
10331 /* Fall thru. */
10332
10333 dodyn2:
10334 if ((input_section->flags & SEC_ALLOC) == 0)
10335 break;
10336
10337 if (NO_OPD_RELOCS && is_opd)
10338 break;
10339
10340 if ((info->shared
10341 && (h == NULL
10342 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10343 || h->elf.root.type != bfd_link_hash_undefweak)
10344 && (MUST_BE_DYN_RELOC (r_type)
10345 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10346 || (ELIMINATE_COPY_RELOCS
10347 && !info->shared
10348 && h != NULL
10349 && h->elf.dynindx != -1
10350 && !h->elf.non_got_ref
10351 && h->elf.def_dynamic
10352 && !h->elf.def_regular))
10353 {
10354 Elf_Internal_Rela outrel;
10355 bfd_boolean skip, relocate;
10356 asection *sreloc;
10357 bfd_byte *loc;
10358 bfd_vma out_off;
10359
10360 /* When generating a dynamic object, these relocations
10361 are copied into the output file to be resolved at run
10362 time. */
10363
10364 skip = FALSE;
10365 relocate = FALSE;
10366
10367 out_off = _bfd_elf_section_offset (output_bfd, info,
10368 input_section, rel->r_offset);
10369 if (out_off == (bfd_vma) -1)
10370 skip = TRUE;
10371 else if (out_off == (bfd_vma) -2)
10372 skip = TRUE, relocate = TRUE;
10373 out_off += (input_section->output_section->vma
10374 + input_section->output_offset);
10375 outrel.r_offset = out_off;
10376 outrel.r_addend = rel->r_addend;
10377
10378 /* Optimize unaligned reloc use. */
10379 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10380 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10381 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10382 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10383 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10384 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10385 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10386 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10387 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10388
10389 if (skip)
10390 memset (&outrel, 0, sizeof outrel);
10391 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10392 && !is_opd
10393 && r_type != R_PPC64_TOC)
10394 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10395 else
10396 {
10397 /* This symbol is local, or marked to become local,
10398 or this is an opd section reloc which must point
10399 at a local function. */
10400 outrel.r_addend += relocation;
10401 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10402 {
10403 if (is_opd && h != NULL)
10404 {
10405 /* Lie about opd entries. This case occurs
10406 when building shared libraries and we
10407 reference a function in another shared
10408 lib. The same thing happens for a weak
10409 definition in an application that's
10410 overridden by a strong definition in a
10411 shared lib. (I believe this is a generic
10412 bug in binutils handling of weak syms.)
10413 In these cases we won't use the opd
10414 entry in this lib. */
10415 unresolved_reloc = FALSE;
10416 }
10417 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10418
10419 /* We need to relocate .opd contents for ld.so.
10420 Prelink also wants simple and consistent rules
10421 for relocs. This make all RELATIVE relocs have
10422 *r_offset equal to r_addend. */
10423 relocate = TRUE;
10424 }
10425 else
10426 {
10427 long indx = 0;
10428
10429 if (bfd_is_abs_section (sec))
10430 ;
10431 else if (sec == NULL || sec->owner == NULL)
10432 {
10433 bfd_set_error (bfd_error_bad_value);
10434 return FALSE;
10435 }
10436 else
10437 {
10438 asection *osec;
10439
10440 osec = sec->output_section;
10441 indx = elf_section_data (osec)->dynindx;
10442
10443 /* We are turning this relocation into one
10444 against a section symbol, so subtract out
10445 the output section's address but not the
10446 offset of the input section in the output
10447 section. */
10448 outrel.r_addend -= osec->vma;
10449 }
10450
10451 outrel.r_info = ELF64_R_INFO (indx, r_type);
10452 }
10453 }
10454
10455 sreloc = elf_section_data (input_section)->sreloc;
10456 if (sreloc == NULL)
10457 abort ();
10458
10459 loc = sreloc->contents;
10460 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10461 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10462
10463 /* If this reloc is against an external symbol, it will
10464 be computed at runtime, so there's no need to do
10465 anything now. However, for the sake of prelink ensure
10466 that the section contents are a known value. */
10467 if (! relocate)
10468 {
10469 unresolved_reloc = FALSE;
10470 /* The value chosen here is quite arbitrary as ld.so
10471 ignores section contents except for the special
10472 case of .opd where the contents might be accessed
10473 before relocation. Choose zero, as that won't
10474 cause reloc overflow. */
10475 relocation = 0;
10476 addend = 0;
10477 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10478 to improve backward compatibility with older
10479 versions of ld. */
10480 if (r_type == R_PPC64_ADDR64)
10481 addend = outrel.r_addend;
10482 /* Adjust pc_relative relocs to have zero in *r_offset. */
10483 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10484 addend = (input_section->output_section->vma
10485 + input_section->output_offset
10486 + rel->r_offset);
10487 }
10488 }
10489 break;
10490
10491 case R_PPC64_COPY:
10492 case R_PPC64_GLOB_DAT:
10493 case R_PPC64_JMP_SLOT:
10494 case R_PPC64_RELATIVE:
10495 /* We shouldn't ever see these dynamic relocs in relocatable
10496 files. */
10497 /* Fall through. */
10498
10499 case R_PPC64_PLTGOT16:
10500 case R_PPC64_PLTGOT16_DS:
10501 case R_PPC64_PLTGOT16_HA:
10502 case R_PPC64_PLTGOT16_HI:
10503 case R_PPC64_PLTGOT16_LO:
10504 case R_PPC64_PLTGOT16_LO_DS:
10505 case R_PPC64_PLTREL32:
10506 case R_PPC64_PLTREL64:
10507 /* These ones haven't been implemented yet. */
10508
10509 (*_bfd_error_handler)
10510 (_("%B: relocation %s is not supported for symbol %s."),
10511 input_bfd,
10512 ppc64_elf_howto_table[r_type]->name, sym_name);
10513
10514 bfd_set_error (bfd_error_invalid_operation);
10515 ret = FALSE;
10516 continue;
10517 }
10518
10519 /* Do any further special processing. */
10520 switch (r_type)
10521 {
10522 default:
10523 break;
10524
10525 case R_PPC64_ADDR16_HA:
10526 case R_PPC64_ADDR16_HIGHERA:
10527 case R_PPC64_ADDR16_HIGHESTA:
10528 case R_PPC64_GOT16_HA:
10529 case R_PPC64_PLTGOT16_HA:
10530 case R_PPC64_PLT16_HA:
10531 case R_PPC64_TOC16_HA:
10532 case R_PPC64_SECTOFF_HA:
10533 case R_PPC64_TPREL16_HA:
10534 case R_PPC64_DTPREL16_HA:
10535 case R_PPC64_GOT_TLSGD16_HA:
10536 case R_PPC64_GOT_TLSLD16_HA:
10537 case R_PPC64_GOT_TPREL16_HA:
10538 case R_PPC64_GOT_DTPREL16_HA:
10539 case R_PPC64_TPREL16_HIGHER:
10540 case R_PPC64_TPREL16_HIGHERA:
10541 case R_PPC64_TPREL16_HIGHEST:
10542 case R_PPC64_TPREL16_HIGHESTA:
10543 case R_PPC64_DTPREL16_HIGHER:
10544 case R_PPC64_DTPREL16_HIGHERA:
10545 case R_PPC64_DTPREL16_HIGHEST:
10546 case R_PPC64_DTPREL16_HIGHESTA:
10547 /* It's just possible that this symbol is a weak symbol
10548 that's not actually defined anywhere. In that case,
10549 'sec' would be NULL, and we should leave the symbol
10550 alone (it will be set to zero elsewhere in the link). */
10551 if (sec != NULL)
10552 /* Add 0x10000 if sign bit in 0:15 is set.
10553 Bits 0:15 are not used. */
10554 addend += 0x8000;
10555 break;
10556
10557 case R_PPC64_ADDR16_DS:
10558 case R_PPC64_ADDR16_LO_DS:
10559 case R_PPC64_GOT16_DS:
10560 case R_PPC64_GOT16_LO_DS:
10561 case R_PPC64_PLT16_LO_DS:
10562 case R_PPC64_SECTOFF_DS:
10563 case R_PPC64_SECTOFF_LO_DS:
10564 case R_PPC64_TOC16_DS:
10565 case R_PPC64_TOC16_LO_DS:
10566 case R_PPC64_PLTGOT16_DS:
10567 case R_PPC64_PLTGOT16_LO_DS:
10568 case R_PPC64_GOT_TPREL16_DS:
10569 case R_PPC64_GOT_TPREL16_LO_DS:
10570 case R_PPC64_GOT_DTPREL16_DS:
10571 case R_PPC64_GOT_DTPREL16_LO_DS:
10572 case R_PPC64_TPREL16_DS:
10573 case R_PPC64_TPREL16_LO_DS:
10574 case R_PPC64_DTPREL16_DS:
10575 case R_PPC64_DTPREL16_LO_DS:
10576 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10577 mask = 3;
10578 /* If this reloc is against an lq insn, then the value must be
10579 a multiple of 16. This is somewhat of a hack, but the
10580 "correct" way to do this by defining _DQ forms of all the
10581 _DS relocs bloats all reloc switches in this file. It
10582 doesn't seem to make much sense to use any of these relocs
10583 in data, so testing the insn should be safe. */
10584 if ((insn & (0x3f << 26)) == (56u << 26))
10585 mask = 15;
10586 if (((relocation + addend) & mask) != 0)
10587 {
10588 (*_bfd_error_handler)
10589 (_("%B: error: relocation %s not a multiple of %d"),
10590 input_bfd,
10591 ppc64_elf_howto_table[r_type]->name,
10592 mask + 1);
10593 bfd_set_error (bfd_error_bad_value);
10594 ret = FALSE;
10595 continue;
10596 }
10597 break;
10598 }
10599
10600 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10601 because such sections are not SEC_ALLOC and thus ld.so will
10602 not process them. */
10603 if (unresolved_reloc
10604 && !((input_section->flags & SEC_DEBUGGING) != 0
10605 && h->elf.def_dynamic))
10606 {
10607 (*_bfd_error_handler)
10608 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10609 input_bfd,
10610 input_section,
10611 (long) rel->r_offset,
10612 ppc64_elf_howto_table[(int) r_type]->name,
10613 h->elf.root.root.string);
10614 ret = FALSE;
10615 }
10616
10617 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10618 input_bfd,
10619 input_section,
10620 contents,
10621 rel->r_offset,
10622 relocation,
10623 addend);
10624
10625 if (r != bfd_reloc_ok)
10626 {
10627 if (sym_name == NULL)
10628 sym_name = "(null)";
10629 if (r == bfd_reloc_overflow)
10630 {
10631 if (warned)
10632 continue;
10633 if (h != NULL
10634 && h->elf.root.type == bfd_link_hash_undefweak
10635 && ppc64_elf_howto_table[r_type]->pc_relative)
10636 {
10637 /* Assume this is a call protected by other code that
10638 detects the symbol is undefined. If this is the case,
10639 we can safely ignore the overflow. If not, the
10640 program is hosed anyway, and a little warning isn't
10641 going to help. */
10642
10643 continue;
10644 }
10645
10646 if (!((*info->callbacks->reloc_overflow)
10647 (info, (h ? &h->elf.root : NULL), sym_name,
10648 ppc64_elf_howto_table[r_type]->name,
10649 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10650 return FALSE;
10651 }
10652 else
10653 {
10654 (*_bfd_error_handler)
10655 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10656 input_bfd,
10657 input_section,
10658 (long) rel->r_offset,
10659 ppc64_elf_howto_table[r_type]->name,
10660 sym_name,
10661 (int) r);
10662 ret = FALSE;
10663 }
10664 }
10665 }
10666
10667 /* If we're emitting relocations, then shortly after this function
10668 returns, reloc offsets and addends for this section will be
10669 adjusted. Worse, reloc symbol indices will be for the output
10670 file rather than the input. Save a copy of the relocs for
10671 opd_entry_value. */
10672 if (is_opd && info->emitrelocations)
10673 {
10674 bfd_size_type amt;
10675 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10676 rel = bfd_alloc (input_bfd, amt);
10677 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10678 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10679 if (rel == NULL)
10680 return FALSE;
10681 memcpy (rel, relocs, amt);
10682 }
10683 return ret;
10684 }
10685
10686 /* Adjust the value of any local symbols in opd sections. */
10687
10688 static bfd_boolean
10689 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10690 const char *name ATTRIBUTE_UNUSED,
10691 Elf_Internal_Sym *elfsym,
10692 asection *input_sec,
10693 struct elf_link_hash_entry *h)
10694 {
10695 long *opd_adjust, adjust;
10696 bfd_vma value;
10697
10698 if (h != NULL)
10699 return TRUE;
10700
10701 opd_adjust = get_opd_info (input_sec);
10702 if (opd_adjust == NULL)
10703 return TRUE;
10704
10705 value = elfsym->st_value - input_sec->output_offset;
10706 if (!info->relocatable)
10707 value -= input_sec->output_section->vma;
10708
10709 adjust = opd_adjust[value / 8];
10710 if (adjust == -1)
10711 elfsym->st_value = 0;
10712 else
10713 elfsym->st_value += adjust;
10714 return TRUE;
10715 }
10716
10717 /* Finish up dynamic symbol handling. We set the contents of various
10718 dynamic sections here. */
10719
10720 static bfd_boolean
10721 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10722 struct bfd_link_info *info,
10723 struct elf_link_hash_entry *h,
10724 Elf_Internal_Sym *sym)
10725 {
10726 struct ppc_link_hash_table *htab;
10727 bfd *dynobj;
10728 struct plt_entry *ent;
10729 Elf_Internal_Rela rela;
10730 bfd_byte *loc;
10731
10732 htab = ppc_hash_table (info);
10733 dynobj = htab->elf.dynobj;
10734
10735 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10736 if (ent->plt.offset != (bfd_vma) -1)
10737 {
10738 /* This symbol has an entry in the procedure linkage
10739 table. Set it up. */
10740
10741 if (htab->plt == NULL
10742 || htab->relplt == NULL
10743 || htab->glink == NULL)
10744 abort ();
10745
10746 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10747 fill in the PLT entry. */
10748 rela.r_offset = (htab->plt->output_section->vma
10749 + htab->plt->output_offset
10750 + ent->plt.offset);
10751 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10752 rela.r_addend = ent->addend;
10753
10754 loc = htab->relplt->contents;
10755 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10756 * sizeof (Elf64_External_Rela));
10757 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10758 }
10759
10760 if (h->needs_copy)
10761 {
10762 Elf_Internal_Rela rela;
10763 bfd_byte *loc;
10764
10765 /* This symbol needs a copy reloc. Set it up. */
10766
10767 if (h->dynindx == -1
10768 || (h->root.type != bfd_link_hash_defined
10769 && h->root.type != bfd_link_hash_defweak)
10770 || htab->relbss == NULL)
10771 abort ();
10772
10773 rela.r_offset = (h->root.u.def.value
10774 + h->root.u.def.section->output_section->vma
10775 + h->root.u.def.section->output_offset);
10776 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10777 rela.r_addend = 0;
10778 loc = htab->relbss->contents;
10779 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10780 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10781 }
10782
10783 /* Mark some specially defined symbols as absolute. */
10784 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10785 sym->st_shndx = SHN_ABS;
10786
10787 return TRUE;
10788 }
10789
10790 /* Used to decide how to sort relocs in an optimal manner for the
10791 dynamic linker, before writing them out. */
10792
10793 static enum elf_reloc_type_class
10794 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10795 {
10796 enum elf_ppc64_reloc_type r_type;
10797
10798 r_type = ELF64_R_TYPE (rela->r_info);
10799 switch (r_type)
10800 {
10801 case R_PPC64_RELATIVE:
10802 return reloc_class_relative;
10803 case R_PPC64_JMP_SLOT:
10804 return reloc_class_plt;
10805 case R_PPC64_COPY:
10806 return reloc_class_copy;
10807 default:
10808 return reloc_class_normal;
10809 }
10810 }
10811
10812 /* Finish up the dynamic sections. */
10813
10814 static bfd_boolean
10815 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10816 struct bfd_link_info *info)
10817 {
10818 struct ppc_link_hash_table *htab;
10819 bfd *dynobj;
10820 asection *sdyn;
10821
10822 htab = ppc_hash_table (info);
10823 dynobj = htab->elf.dynobj;
10824 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10825
10826 if (htab->elf.dynamic_sections_created)
10827 {
10828 Elf64_External_Dyn *dyncon, *dynconend;
10829
10830 if (sdyn == NULL || htab->got == NULL)
10831 abort ();
10832
10833 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10834 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10835 for (; dyncon < dynconend; dyncon++)
10836 {
10837 Elf_Internal_Dyn dyn;
10838 asection *s;
10839
10840 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10841
10842 switch (dyn.d_tag)
10843 {
10844 default:
10845 continue;
10846
10847 case DT_PPC64_GLINK:
10848 s = htab->glink;
10849 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10850 /* We stupidly defined DT_PPC64_GLINK to be the start
10851 of glink rather than the first entry point, which is
10852 what ld.so needs, and now have a bigger stub to
10853 support automatic multiple TOCs. */
10854 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10855 break;
10856
10857 case DT_PPC64_OPD:
10858 s = bfd_get_section_by_name (output_bfd, ".opd");
10859 if (s == NULL)
10860 continue;
10861 dyn.d_un.d_ptr = s->vma;
10862 break;
10863
10864 case DT_PPC64_OPDSZ:
10865 s = bfd_get_section_by_name (output_bfd, ".opd");
10866 if (s == NULL)
10867 continue;
10868 dyn.d_un.d_val = s->size;
10869 break;
10870
10871 case DT_PLTGOT:
10872 s = htab->plt;
10873 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10874 break;
10875
10876 case DT_JMPREL:
10877 s = htab->relplt;
10878 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10879 break;
10880
10881 case DT_PLTRELSZ:
10882 dyn.d_un.d_val = htab->relplt->size;
10883 break;
10884
10885 case DT_RELASZ:
10886 /* Don't count procedure linkage table relocs in the
10887 overall reloc count. */
10888 s = htab->relplt;
10889 if (s == NULL)
10890 continue;
10891 dyn.d_un.d_val -= s->size;
10892 break;
10893
10894 case DT_RELA:
10895 /* We may not be using the standard ELF linker script.
10896 If .rela.plt is the first .rela section, we adjust
10897 DT_RELA to not include it. */
10898 s = htab->relplt;
10899 if (s == NULL)
10900 continue;
10901 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10902 continue;
10903 dyn.d_un.d_ptr += s->size;
10904 break;
10905 }
10906
10907 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10908 }
10909 }
10910
10911 if (htab->got != NULL && htab->got->size != 0)
10912 {
10913 /* Fill in the first entry in the global offset table.
10914 We use it to hold the link-time TOCbase. */
10915 bfd_put_64 (output_bfd,
10916 elf_gp (output_bfd) + TOC_BASE_OFF,
10917 htab->got->contents);
10918
10919 /* Set .got entry size. */
10920 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10921 }
10922
10923 if (htab->plt != NULL && htab->plt->size != 0)
10924 {
10925 /* Set .plt entry size. */
10926 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10927 = PLT_ENTRY_SIZE;
10928 }
10929
10930 /* We need to handle writing out multiple GOT sections ourselves,
10931 since we didn't add them to DYNOBJ. We know dynobj is the first
10932 bfd. */
10933 while ((dynobj = dynobj->link_next) != NULL)
10934 {
10935 asection *s;
10936
10937 if (!is_ppc64_elf_target (dynobj->xvec))
10938 continue;
10939
10940 s = ppc64_elf_tdata (dynobj)->got;
10941 if (s != NULL
10942 && s->size != 0
10943 && s->output_section != bfd_abs_section_ptr
10944 && !bfd_set_section_contents (output_bfd, s->output_section,
10945 s->contents, s->output_offset,
10946 s->size))
10947 return FALSE;
10948 s = ppc64_elf_tdata (dynobj)->relgot;
10949 if (s != NULL
10950 && s->size != 0
10951 && s->output_section != bfd_abs_section_ptr
10952 && !bfd_set_section_contents (output_bfd, s->output_section,
10953 s->contents, s->output_offset,
10954 s->size))
10955 return FALSE;
10956 }
10957
10958 return TRUE;
10959 }
10960
10961 #include "elf64-target.h"
GDB Binutils - Deliverables
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