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bfd/
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 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 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_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 | SEC_ALLOC | SEC_LOAD);
4693 if (sreloc == NULL
4694 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4695 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4696 return FALSE;
4697 }
4698 elf_section_data (sec)->sreloc = sreloc;
4699 }
4700
4701 /* If this is a global symbol, we count the number of
4702 relocations we need for this symbol. */
4703 if (h != NULL)
4704 {
4705 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4706 }
4707 else
4708 {
4709 /* Track dynamic relocs needed for local syms too.
4710 We really need local syms available to do this
4711 easily. Oh well. */
4712
4713 asection *s;
4714 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4715 sec, r_symndx);
4716 if (s == NULL)
4717 return FALSE;
4718
4719 head = ((struct ppc_dyn_relocs **)
4720 &elf_section_data (s)->local_dynrel);
4721 }
4722
4723 p = *head;
4724 if (p == NULL || p->sec != sec)
4725 {
4726 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4727 if (p == NULL)
4728 return FALSE;
4729 p->next = *head;
4730 *head = p;
4731 p->sec = sec;
4732 p->count = 0;
4733 p->pc_count = 0;
4734 }
4735
4736 p->count += 1;
4737 if (!MUST_BE_DYN_RELOC (r_type))
4738 p->pc_count += 1;
4739 }
4740 break;
4741
4742 default:
4743 break;
4744 }
4745 }
4746
4747 return TRUE;
4748 }
4749
4750 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4751 of the code entry point, and its section. */
4752
4753 static bfd_vma
4754 opd_entry_value (asection *opd_sec,
4755 bfd_vma offset,
4756 asection **code_sec,
4757 bfd_vma *code_off)
4758 {
4759 bfd *opd_bfd = opd_sec->owner;
4760 Elf_Internal_Rela *relocs;
4761 Elf_Internal_Rela *lo, *hi, *look;
4762 bfd_vma val;
4763
4764 /* No relocs implies we are linking a --just-symbols object. */
4765 if (opd_sec->reloc_count == 0)
4766 {
4767 bfd_vma val;
4768
4769 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4770 return (bfd_vma) -1;
4771
4772 if (code_sec != NULL)
4773 {
4774 asection *sec, *likely = NULL;
4775 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4776 if (sec->vma <= val
4777 && (sec->flags & SEC_LOAD) != 0
4778 && (sec->flags & SEC_ALLOC) != 0)
4779 likely = sec;
4780 if (likely != NULL)
4781 {
4782 *code_sec = likely;
4783 if (code_off != NULL)
4784 *code_off = val - likely->vma;
4785 }
4786 }
4787 return val;
4788 }
4789
4790 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4791 if (relocs == NULL)
4792 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4793
4794 /* Go find the opd reloc at the sym address. */
4795 lo = relocs;
4796 BFD_ASSERT (lo != NULL);
4797 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4798 val = (bfd_vma) -1;
4799 while (lo < hi)
4800 {
4801 look = lo + (hi - lo) / 2;
4802 if (look->r_offset < offset)
4803 lo = look + 1;
4804 else if (look->r_offset > offset)
4805 hi = look;
4806 else
4807 {
4808 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4809 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4810 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4811 {
4812 unsigned long symndx = ELF64_R_SYM (look->r_info);
4813 asection *sec;
4814
4815 if (symndx < symtab_hdr->sh_info)
4816 {
4817 Elf_Internal_Sym *sym;
4818
4819 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4820 if (sym == NULL)
4821 {
4822 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4823 symtab_hdr->sh_info,
4824 0, NULL, NULL, NULL);
4825 if (sym == NULL)
4826 break;
4827 symtab_hdr->contents = (bfd_byte *) sym;
4828 }
4829
4830 sym += symndx;
4831 val = sym->st_value;
4832 sec = NULL;
4833 if ((sym->st_shndx != SHN_UNDEF
4834 && sym->st_shndx < SHN_LORESERVE)
4835 || sym->st_shndx > SHN_HIRESERVE)
4836 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4837 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4838 }
4839 else
4840 {
4841 struct elf_link_hash_entry **sym_hashes;
4842 struct elf_link_hash_entry *rh;
4843
4844 sym_hashes = elf_sym_hashes (opd_bfd);
4845 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4846 while (rh->root.type == bfd_link_hash_indirect
4847 || rh->root.type == bfd_link_hash_warning)
4848 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4849 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4850 || rh->root.type == bfd_link_hash_defweak);
4851 val = rh->root.u.def.value;
4852 sec = rh->root.u.def.section;
4853 }
4854 val += look->r_addend;
4855 if (code_off != NULL)
4856 *code_off = val;
4857 if (code_sec != NULL)
4858 *code_sec = sec;
4859 if (sec != NULL && sec->output_section != NULL)
4860 val += sec->output_section->vma + sec->output_offset;
4861 }
4862 break;
4863 }
4864 }
4865
4866 return val;
4867 }
4868
4869 /* Return the section that should be marked against GC for a given
4870 relocation. */
4871
4872 static asection *
4873 ppc64_elf_gc_mark_hook (asection *sec,
4874 struct bfd_link_info *info,
4875 Elf_Internal_Rela *rel,
4876 struct elf_link_hash_entry *h,
4877 Elf_Internal_Sym *sym)
4878 {
4879 asection *rsec;
4880
4881 /* First mark all our entry sym sections. */
4882 if (info->gc_sym_list != NULL)
4883 {
4884 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4885 struct bfd_sym_chain *sym = info->gc_sym_list;
4886
4887 info->gc_sym_list = NULL;
4888 do
4889 {
4890 struct ppc_link_hash_entry *eh;
4891
4892 eh = (struct ppc_link_hash_entry *)
4893 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4894 if (eh == NULL)
4895 continue;
4896 if (eh->elf.root.type != bfd_link_hash_defined
4897 && eh->elf.root.type != bfd_link_hash_defweak)
4898 continue;
4899
4900 if (eh->is_func_descriptor
4901 && (eh->oh->elf.root.type == bfd_link_hash_defined
4902 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4903 rsec = eh->oh->elf.root.u.def.section;
4904 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4905 && opd_entry_value (eh->elf.root.u.def.section,
4906 eh->elf.root.u.def.value,
4907 &rsec, NULL) != (bfd_vma) -1)
4908 ;
4909 else
4910 continue;
4911
4912 if (!rsec->gc_mark)
4913 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4914
4915 rsec = eh->elf.root.u.def.section;
4916 if (!rsec->gc_mark)
4917 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4918
4919 sym = sym->next;
4920 }
4921 while (sym != NULL);
4922 }
4923
4924 /* Syms return NULL if we're marking .opd, so we avoid marking all
4925 function sections, as all functions are referenced in .opd. */
4926 rsec = NULL;
4927 if (get_opd_info (sec) != NULL)
4928 return rsec;
4929
4930 if (h != NULL)
4931 {
4932 enum elf_ppc64_reloc_type r_type;
4933 struct ppc_link_hash_entry *eh;
4934
4935 r_type = ELF64_R_TYPE (rel->r_info);
4936 switch (r_type)
4937 {
4938 case R_PPC64_GNU_VTINHERIT:
4939 case R_PPC64_GNU_VTENTRY:
4940 break;
4941
4942 default:
4943 switch (h->root.type)
4944 {
4945 case bfd_link_hash_defined:
4946 case bfd_link_hash_defweak:
4947 eh = (struct ppc_link_hash_entry *) h;
4948 if (eh->oh != NULL
4949 && eh->oh->is_func_descriptor
4950 && (eh->oh->elf.root.type == bfd_link_hash_defined
4951 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4952 eh = eh->oh;
4953
4954 /* Function descriptor syms cause the associated
4955 function code sym section to be marked. */
4956 if (eh->is_func_descriptor
4957 && (eh->oh->elf.root.type == bfd_link_hash_defined
4958 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4959 {
4960 /* They also mark their opd section. */
4961 if (!eh->elf.root.u.def.section->gc_mark)
4962 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4963 ppc64_elf_gc_mark_hook);
4964
4965 rsec = eh->oh->elf.root.u.def.section;
4966 }
4967 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4968 && opd_entry_value (eh->elf.root.u.def.section,
4969 eh->elf.root.u.def.value,
4970 &rsec, NULL) != (bfd_vma) -1)
4971 {
4972 if (!eh->elf.root.u.def.section->gc_mark)
4973 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4974 ppc64_elf_gc_mark_hook);
4975 }
4976 else
4977 rsec = h->root.u.def.section;
4978 break;
4979
4980 case bfd_link_hash_common:
4981 rsec = h->root.u.c.p->section;
4982 break;
4983
4984 default:
4985 break;
4986 }
4987 }
4988 }
4989 else
4990 {
4991 asection **opd_sym_section;
4992
4993 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4994 opd_sym_section = get_opd_info (rsec);
4995 if (opd_sym_section != NULL)
4996 {
4997 if (!rsec->gc_mark)
4998 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4999
5000 rsec = opd_sym_section[sym->st_value / 8];
5001 }
5002 }
5003
5004 return rsec;
5005 }
5006
5007 /* Update the .got, .plt. and dynamic reloc reference counts for the
5008 section being removed. */
5009
5010 static bfd_boolean
5011 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5012 asection *sec, const Elf_Internal_Rela *relocs)
5013 {
5014 struct ppc_link_hash_table *htab;
5015 Elf_Internal_Shdr *symtab_hdr;
5016 struct elf_link_hash_entry **sym_hashes;
5017 struct got_entry **local_got_ents;
5018 const Elf_Internal_Rela *rel, *relend;
5019
5020 if ((sec->flags & SEC_ALLOC) == 0)
5021 return TRUE;
5022
5023 elf_section_data (sec)->local_dynrel = NULL;
5024
5025 htab = ppc_hash_table (info);
5026 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5027 sym_hashes = elf_sym_hashes (abfd);
5028 local_got_ents = elf_local_got_ents (abfd);
5029
5030 relend = relocs + sec->reloc_count;
5031 for (rel = relocs; rel < relend; rel++)
5032 {
5033 unsigned long r_symndx;
5034 enum elf_ppc64_reloc_type r_type;
5035 struct elf_link_hash_entry *h = NULL;
5036 char tls_type = 0;
5037
5038 r_symndx = ELF64_R_SYM (rel->r_info);
5039 r_type = ELF64_R_TYPE (rel->r_info);
5040 if (r_symndx >= symtab_hdr->sh_info)
5041 {
5042 struct ppc_link_hash_entry *eh;
5043 struct ppc_dyn_relocs **pp;
5044 struct ppc_dyn_relocs *p;
5045
5046 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5047 while (h->root.type == bfd_link_hash_indirect
5048 || h->root.type == bfd_link_hash_warning)
5049 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5050 eh = (struct ppc_link_hash_entry *) h;
5051
5052 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5053 if (p->sec == sec)
5054 {
5055 /* Everything must go for SEC. */
5056 *pp = p->next;
5057 break;
5058 }
5059 }
5060
5061 switch (r_type)
5062 {
5063 case R_PPC64_GOT_TLSLD16:
5064 case R_PPC64_GOT_TLSLD16_LO:
5065 case R_PPC64_GOT_TLSLD16_HI:
5066 case R_PPC64_GOT_TLSLD16_HA:
5067 ppc64_tlsld_got (abfd)->refcount -= 1;
5068 tls_type = TLS_TLS | TLS_LD;
5069 goto dogot;
5070
5071 case R_PPC64_GOT_TLSGD16:
5072 case R_PPC64_GOT_TLSGD16_LO:
5073 case R_PPC64_GOT_TLSGD16_HI:
5074 case R_PPC64_GOT_TLSGD16_HA:
5075 tls_type = TLS_TLS | TLS_GD;
5076 goto dogot;
5077
5078 case R_PPC64_GOT_TPREL16_DS:
5079 case R_PPC64_GOT_TPREL16_LO_DS:
5080 case R_PPC64_GOT_TPREL16_HI:
5081 case R_PPC64_GOT_TPREL16_HA:
5082 tls_type = TLS_TLS | TLS_TPREL;
5083 goto dogot;
5084
5085 case R_PPC64_GOT_DTPREL16_DS:
5086 case R_PPC64_GOT_DTPREL16_LO_DS:
5087 case R_PPC64_GOT_DTPREL16_HI:
5088 case R_PPC64_GOT_DTPREL16_HA:
5089 tls_type = TLS_TLS | TLS_DTPREL;
5090 goto dogot;
5091
5092 case R_PPC64_GOT16:
5093 case R_PPC64_GOT16_DS:
5094 case R_PPC64_GOT16_HA:
5095 case R_PPC64_GOT16_HI:
5096 case R_PPC64_GOT16_LO:
5097 case R_PPC64_GOT16_LO_DS:
5098 dogot:
5099 {
5100 struct got_entry *ent;
5101
5102 if (h != NULL)
5103 ent = h->got.glist;
5104 else
5105 ent = local_got_ents[r_symndx];
5106
5107 for (; ent != NULL; ent = ent->next)
5108 if (ent->addend == rel->r_addend
5109 && ent->owner == abfd
5110 && ent->tls_type == tls_type)
5111 break;
5112 if (ent == NULL)
5113 abort ();
5114 if (ent->got.refcount > 0)
5115 ent->got.refcount -= 1;
5116 }
5117 break;
5118
5119 case R_PPC64_PLT16_HA:
5120 case R_PPC64_PLT16_HI:
5121 case R_PPC64_PLT16_LO:
5122 case R_PPC64_PLT32:
5123 case R_PPC64_PLT64:
5124 case R_PPC64_REL14:
5125 case R_PPC64_REL14_BRNTAKEN:
5126 case R_PPC64_REL14_BRTAKEN:
5127 case R_PPC64_REL24:
5128 if (h != NULL)
5129 {
5130 struct plt_entry *ent;
5131
5132 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5133 if (ent->addend == rel->r_addend)
5134 break;
5135 if (ent == NULL)
5136 abort ();
5137 if (ent->plt.refcount > 0)
5138 ent->plt.refcount -= 1;
5139 }
5140 break;
5141
5142 default:
5143 break;
5144 }
5145 }
5146 return TRUE;
5147 }
5148
5149 /* The maximum size of .sfpr. */
5150 #define SFPR_MAX (218*4)
5151
5152 struct sfpr_def_parms
5153 {
5154 const char name[12];
5155 unsigned char lo, hi;
5156 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5157 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5158 };
5159
5160 /* Auto-generate _save*, _rest* functions in .sfpr. */
5161
5162 static unsigned int
5163 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5164 {
5165 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5166 unsigned int i;
5167 size_t len = strlen (parm->name);
5168 bfd_boolean writing = FALSE;
5169 char sym[16];
5170
5171 memcpy (sym, parm->name, len);
5172 sym[len + 2] = 0;
5173
5174 for (i = parm->lo; i <= parm->hi; i++)
5175 {
5176 struct elf_link_hash_entry *h;
5177
5178 sym[len + 0] = i / 10 + '0';
5179 sym[len + 1] = i % 10 + '0';
5180 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5181 if (h != NULL
5182 && !h->def_regular)
5183 {
5184 h->root.type = bfd_link_hash_defined;
5185 h->root.u.def.section = htab->sfpr;
5186 h->root.u.def.value = htab->sfpr->size;
5187 h->type = STT_FUNC;
5188 h->def_regular = 1;
5189 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5190 writing = TRUE;
5191 if (htab->sfpr->contents == NULL)
5192 {
5193 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5194 if (htab->sfpr->contents == NULL)
5195 return FALSE;
5196 }
5197 }
5198 if (writing)
5199 {
5200 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5201 if (i != parm->hi)
5202 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5203 else
5204 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5205 htab->sfpr->size = p - htab->sfpr->contents;
5206 }
5207 }
5208
5209 return TRUE;
5210 }
5211
5212 static bfd_byte *
5213 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5214 {
5215 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5216 return p + 4;
5217 }
5218
5219 static bfd_byte *
5220 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5221 {
5222 p = savegpr0 (abfd, p, r);
5223 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5224 p = p + 4;
5225 bfd_put_32 (abfd, BLR, p);
5226 return p + 4;
5227 }
5228
5229 static bfd_byte *
5230 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5231 {
5232 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5233 return p + 4;
5234 }
5235
5236 static bfd_byte *
5237 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5238 {
5239 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5240 p = p + 4;
5241 p = restgpr0 (abfd, p, r);
5242 bfd_put_32 (abfd, MTLR_R0, p);
5243 p = p + 4;
5244 if (r == 29)
5245 {
5246 p = restgpr0 (abfd, p, 30);
5247 p = restgpr0 (abfd, p, 31);
5248 }
5249 bfd_put_32 (abfd, BLR, p);
5250 return p + 4;
5251 }
5252
5253 static bfd_byte *
5254 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5255 {
5256 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5257 return p + 4;
5258 }
5259
5260 static bfd_byte *
5261 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5262 {
5263 p = savegpr1 (abfd, p, r);
5264 bfd_put_32 (abfd, BLR, p);
5265 return p + 4;
5266 }
5267
5268 static bfd_byte *
5269 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5270 {
5271 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5272 return p + 4;
5273 }
5274
5275 static bfd_byte *
5276 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5277 {
5278 p = restgpr1 (abfd, p, r);
5279 bfd_put_32 (abfd, BLR, p);
5280 return p + 4;
5281 }
5282
5283 static bfd_byte *
5284 savefpr (bfd *abfd, bfd_byte *p, int r)
5285 {
5286 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5287 return p + 4;
5288 }
5289
5290 static bfd_byte *
5291 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5292 {
5293 p = savefpr (abfd, p, r);
5294 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5295 p = p + 4;
5296 bfd_put_32 (abfd, BLR, p);
5297 return p + 4;
5298 }
5299
5300 static bfd_byte *
5301 restfpr (bfd *abfd, bfd_byte *p, int r)
5302 {
5303 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5304 return p + 4;
5305 }
5306
5307 static bfd_byte *
5308 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5309 {
5310 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5311 p = p + 4;
5312 p = restfpr (abfd, p, r);
5313 bfd_put_32 (abfd, MTLR_R0, p);
5314 p = p + 4;
5315 if (r == 29)
5316 {
5317 p = restfpr (abfd, p, 30);
5318 p = restfpr (abfd, p, 31);
5319 }
5320 bfd_put_32 (abfd, BLR, p);
5321 return p + 4;
5322 }
5323
5324 static bfd_byte *
5325 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5326 {
5327 p = savefpr (abfd, p, r);
5328 bfd_put_32 (abfd, BLR, p);
5329 return p + 4;
5330 }
5331
5332 static bfd_byte *
5333 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5334 {
5335 p = restfpr (abfd, p, r);
5336 bfd_put_32 (abfd, BLR, p);
5337 return p + 4;
5338 }
5339
5340 static bfd_byte *
5341 savevr (bfd *abfd, bfd_byte *p, int r)
5342 {
5343 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5344 p = p + 4;
5345 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5346 return p + 4;
5347 }
5348
5349 static bfd_byte *
5350 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5351 {
5352 p = savevr (abfd, p, r);
5353 bfd_put_32 (abfd, BLR, p);
5354 return p + 4;
5355 }
5356
5357 static bfd_byte *
5358 restvr (bfd *abfd, bfd_byte *p, int r)
5359 {
5360 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5361 p = p + 4;
5362 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5363 return p + 4;
5364 }
5365
5366 static bfd_byte *
5367 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5368 {
5369 p = restvr (abfd, p, r);
5370 bfd_put_32 (abfd, BLR, p);
5371 return p + 4;
5372 }
5373
5374 /* Called via elf_link_hash_traverse to transfer dynamic linking
5375 information on function code symbol entries to their corresponding
5376 function descriptor symbol entries. */
5377
5378 static bfd_boolean
5379 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5380 {
5381 struct bfd_link_info *info;
5382 struct ppc_link_hash_table *htab;
5383 struct plt_entry *ent;
5384 struct ppc_link_hash_entry *fh;
5385 struct ppc_link_hash_entry *fdh;
5386 bfd_boolean force_local;
5387
5388 fh = (struct ppc_link_hash_entry *) h;
5389 if (fh->elf.root.type == bfd_link_hash_indirect)
5390 return TRUE;
5391
5392 if (fh->elf.root.type == bfd_link_hash_warning)
5393 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5394
5395 info = inf;
5396 htab = ppc_hash_table (info);
5397
5398 /* Resolve undefined references to dot-symbols as the value
5399 in the function descriptor, if we have one in a regular object.
5400 This is to satisfy cases like ".quad .foo". Calls to functions
5401 in dynamic objects are handled elsewhere. */
5402 if (fh->elf.root.type == bfd_link_hash_undefweak
5403 && fh->was_undefined
5404 && (fh->oh->elf.root.type == bfd_link_hash_defined
5405 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5406 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5407 && opd_entry_value (fh->oh->elf.root.u.def.section,
5408 fh->oh->elf.root.u.def.value,
5409 &fh->elf.root.u.def.section,
5410 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5411 {
5412 fh->elf.root.type = fh->oh->elf.root.type;
5413 fh->elf.forced_local = 1;
5414 }
5415
5416 /* If this is a function code symbol, transfer dynamic linking
5417 information to the function descriptor symbol. */
5418 if (!fh->is_func)
5419 return TRUE;
5420
5421 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5422 if (ent->plt.refcount > 0)
5423 break;
5424 if (ent == NULL
5425 || fh->elf.root.root.string[0] != '.'
5426 || fh->elf.root.root.string[1] == '\0')
5427 return TRUE;
5428
5429 /* Find the corresponding function descriptor symbol. Create it
5430 as undefined if necessary. */
5431
5432 fdh = get_fdh (fh, htab);
5433 if (fdh != NULL)
5434 while (fdh->elf.root.type == bfd_link_hash_indirect
5435 || fdh->elf.root.type == bfd_link_hash_warning)
5436 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5437
5438 if (fdh == NULL
5439 && info->shared
5440 && (fh->elf.root.type == bfd_link_hash_undefined
5441 || fh->elf.root.type == bfd_link_hash_undefweak))
5442 {
5443 fdh = make_fdh (info, fh);
5444 if (fdh == NULL)
5445 return FALSE;
5446 }
5447
5448 /* Fake function descriptors are made undefweak. If the function
5449 code symbol is strong undefined, make the fake sym the same. */
5450
5451 if (fdh != NULL
5452 && fdh->fake
5453 && fdh->elf.root.type == bfd_link_hash_undefweak
5454 && fh->elf.root.type == bfd_link_hash_undefined)
5455 {
5456 fdh->elf.root.type = bfd_link_hash_undefined;
5457 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5458 }
5459
5460 if (fdh != NULL
5461 && !fdh->elf.forced_local
5462 && (info->shared
5463 || fdh->elf.def_dynamic
5464 || fdh->elf.ref_dynamic
5465 || (fdh->elf.root.type == bfd_link_hash_undefweak
5466 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5467 {
5468 if (fdh->elf.dynindx == -1)
5469 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5470 return FALSE;
5471 fdh->elf.ref_regular |= fh->elf.ref_regular;
5472 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5473 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5474 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5475 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5476 {
5477 move_plt_plist (fh, fdh);
5478 fdh->elf.needs_plt = 1;
5479 }
5480 fdh->is_func_descriptor = 1;
5481 fdh->oh = fh;
5482 fh->oh = fdh;
5483 }
5484
5485 /* Now that the info is on the function descriptor, clear the
5486 function code sym info. Any function code syms for which we
5487 don't have a definition in a regular file, we force local.
5488 This prevents a shared library from exporting syms that have
5489 been imported from another library. Function code syms that
5490 are really in the library we must leave global to prevent the
5491 linker dragging in a definition from a static library. */
5492 force_local = (!fh->elf.def_regular
5493 || fdh == NULL
5494 || !fdh->elf.def_regular
5495 || fdh->elf.forced_local);
5496 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5497
5498 return TRUE;
5499 }
5500
5501 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5502 this hook to a) provide some gcc support functions, and b) transfer
5503 dynamic linking information gathered so far on function code symbol
5504 entries, to their corresponding function descriptor symbol entries. */
5505
5506 static bfd_boolean
5507 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5508 struct bfd_link_info *info)
5509 {
5510 struct ppc_link_hash_table *htab;
5511 unsigned int i;
5512 const struct sfpr_def_parms funcs[] =
5513 {
5514 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5515 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5516 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5517 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5518 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5519 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5520 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5521 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5522 { "._savef", 14, 31, savefpr, savefpr1_tail },
5523 { "._restf", 14, 31, restfpr, restfpr1_tail },
5524 { "_savevr_", 20, 31, savevr, savevr_tail },
5525 { "_restvr_", 20, 31, restvr, restvr_tail }
5526 };
5527
5528 htab = ppc_hash_table (info);
5529 if (htab->sfpr == NULL)
5530 /* We don't have any relocs. */
5531 return TRUE;
5532
5533 /* Provide any missing _save* and _rest* functions. */
5534 htab->sfpr->size = 0;
5535 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5536 if (!sfpr_define (info, &funcs[i]))
5537 return FALSE;
5538
5539 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5540
5541 if (htab->sfpr->size == 0)
5542 htab->sfpr->flags |= SEC_EXCLUDE;
5543
5544 return TRUE;
5545 }
5546
5547 /* Adjust a symbol defined by a dynamic object and referenced by a
5548 regular object. The current definition is in some section of the
5549 dynamic object, but we're not including those sections. We have to
5550 change the definition to something the rest of the link can
5551 understand. */
5552
5553 static bfd_boolean
5554 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5555 struct elf_link_hash_entry *h)
5556 {
5557 struct ppc_link_hash_table *htab;
5558 asection *s;
5559 unsigned int power_of_two;
5560
5561 htab = ppc_hash_table (info);
5562
5563 /* Deal with function syms. */
5564 if (h->type == STT_FUNC
5565 || h->needs_plt)
5566 {
5567 /* Clear procedure linkage table information for any symbol that
5568 won't need a .plt entry. */
5569 struct plt_entry *ent;
5570 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5571 if (ent->plt.refcount > 0)
5572 break;
5573 if (ent == NULL
5574 || SYMBOL_CALLS_LOCAL (info, h)
5575 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5576 && h->root.type == bfd_link_hash_undefweak))
5577 {
5578 h->plt.plist = NULL;
5579 h->needs_plt = 0;
5580 }
5581 }
5582 else
5583 h->plt.plist = NULL;
5584
5585 /* If this is a weak symbol, and there is a real definition, the
5586 processor independent code will have arranged for us to see the
5587 real definition first, and we can just use the same value. */
5588 if (h->u.weakdef != NULL)
5589 {
5590 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5591 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5592 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5593 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5594 if (ELIMINATE_COPY_RELOCS)
5595 h->non_got_ref = h->u.weakdef->non_got_ref;
5596 return TRUE;
5597 }
5598
5599 /* If we are creating a shared library, we must presume that the
5600 only references to the symbol are via the global offset table.
5601 For such cases we need not do anything here; the relocations will
5602 be handled correctly by relocate_section. */
5603 if (info->shared)
5604 return TRUE;
5605
5606 /* If there are no references to this symbol that do not use the
5607 GOT, we don't need to generate a copy reloc. */
5608 if (!h->non_got_ref)
5609 return TRUE;
5610
5611 if (ELIMINATE_COPY_RELOCS)
5612 {
5613 struct ppc_link_hash_entry * eh;
5614 struct ppc_dyn_relocs *p;
5615
5616 eh = (struct ppc_link_hash_entry *) h;
5617 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5618 {
5619 s = p->sec->output_section;
5620 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5621 break;
5622 }
5623
5624 /* If we didn't find any dynamic relocs in read-only sections, then
5625 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5626 if (p == NULL)
5627 {
5628 h->non_got_ref = 0;
5629 return TRUE;
5630 }
5631 }
5632
5633 if (h->plt.plist != NULL)
5634 {
5635 /* We should never get here, but unfortunately there are versions
5636 of gcc out there that improperly (for this ABI) put initialized
5637 function pointers, vtable refs and suchlike in read-only
5638 sections. Allow them to proceed, but warn that this might
5639 break at runtime. */
5640 (*_bfd_error_handler)
5641 (_("copy reloc against `%s' requires lazy plt linking; "
5642 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5643 h->root.root.string);
5644 }
5645
5646 /* This is a reference to a symbol defined by a dynamic object which
5647 is not a function. */
5648
5649 /* We must allocate the symbol in our .dynbss section, which will
5650 become part of the .bss section of the executable. There will be
5651 an entry for this symbol in the .dynsym section. The dynamic
5652 object will contain position independent code, so all references
5653 from the dynamic object to this symbol will go through the global
5654 offset table. The dynamic linker will use the .dynsym entry to
5655 determine the address it must put in the global offset table, so
5656 both the dynamic object and the regular object will refer to the
5657 same memory location for the variable. */
5658
5659 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5660 to copy the initial value out of the dynamic object and into the
5661 runtime process image. We need to remember the offset into the
5662 .rela.bss section we are going to use. */
5663 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5664 {
5665 htab->relbss->size += sizeof (Elf64_External_Rela);
5666 h->needs_copy = 1;
5667 }
5668
5669 /* We need to figure out the alignment required for this symbol. I
5670 have no idea how ELF linkers handle this. */
5671 power_of_two = bfd_log2 (h->size);
5672 if (power_of_two > 4)
5673 power_of_two = 4;
5674
5675 /* Apply the required alignment. */
5676 s = htab->dynbss;
5677 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5678 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5679 {
5680 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5681 return FALSE;
5682 }
5683
5684 /* Define the symbol as being at this point in the section. */
5685 h->root.u.def.section = s;
5686 h->root.u.def.value = s->size;
5687
5688 /* Increment the section size to make room for the symbol. */
5689 s->size += h->size;
5690
5691 return TRUE;
5692 }
5693
5694 /* If given a function descriptor symbol, hide both the function code
5695 sym and the descriptor. */
5696 static void
5697 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5698 struct elf_link_hash_entry *h,
5699 bfd_boolean force_local)
5700 {
5701 struct ppc_link_hash_entry *eh;
5702 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5703
5704 eh = (struct ppc_link_hash_entry *) h;
5705 if (eh->is_func_descriptor)
5706 {
5707 struct ppc_link_hash_entry *fh = eh->oh;
5708
5709 if (fh == NULL)
5710 {
5711 const char *p, *q;
5712 struct ppc_link_hash_table *htab;
5713 char save;
5714
5715 /* We aren't supposed to use alloca in BFD because on
5716 systems which do not have alloca the version in libiberty
5717 calls xmalloc, which might cause the program to crash
5718 when it runs out of memory. This function doesn't have a
5719 return status, so there's no way to gracefully return an
5720 error. So cheat. We know that string[-1] can be safely
5721 accessed; It's either a string in an ELF string table,
5722 or allocated in an objalloc structure. */
5723
5724 p = eh->elf.root.root.string - 1;
5725 save = *p;
5726 *(char *) p = '.';
5727 htab = ppc_hash_table (info);
5728 fh = (struct ppc_link_hash_entry *)
5729 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5730 *(char *) p = save;
5731
5732 /* Unfortunately, if it so happens that the string we were
5733 looking for was allocated immediately before this string,
5734 then we overwrote the string terminator. That's the only
5735 reason the lookup should fail. */
5736 if (fh == NULL)
5737 {
5738 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5739 while (q >= eh->elf.root.root.string && *q == *p)
5740 --q, --p;
5741 if (q < eh->elf.root.root.string && *p == '.')
5742 fh = (struct ppc_link_hash_entry *)
5743 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5744 }
5745 if (fh != NULL)
5746 {
5747 eh->oh = fh;
5748 fh->oh = eh;
5749 }
5750 }
5751 if (fh != NULL)
5752 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5753 }
5754 }
5755
5756 static bfd_boolean
5757 get_sym_h (struct elf_link_hash_entry **hp,
5758 Elf_Internal_Sym **symp,
5759 asection **symsecp,
5760 char **tls_maskp,
5761 Elf_Internal_Sym **locsymsp,
5762 unsigned long r_symndx,
5763 bfd *ibfd)
5764 {
5765 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5766
5767 if (r_symndx >= symtab_hdr->sh_info)
5768 {
5769 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5770 struct elf_link_hash_entry *h;
5771
5772 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5773 while (h->root.type == bfd_link_hash_indirect
5774 || h->root.type == bfd_link_hash_warning)
5775 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5776
5777 if (hp != NULL)
5778 *hp = h;
5779
5780 if (symp != NULL)
5781 *symp = NULL;
5782
5783 if (symsecp != NULL)
5784 {
5785 asection *symsec = NULL;
5786 if (h->root.type == bfd_link_hash_defined
5787 || h->root.type == bfd_link_hash_defweak)
5788 symsec = h->root.u.def.section;
5789 *symsecp = symsec;
5790 }
5791
5792 if (tls_maskp != NULL)
5793 {
5794 struct ppc_link_hash_entry *eh;
5795
5796 eh = (struct ppc_link_hash_entry *) h;
5797 *tls_maskp = &eh->tls_mask;
5798 }
5799 }
5800 else
5801 {
5802 Elf_Internal_Sym *sym;
5803 Elf_Internal_Sym *locsyms = *locsymsp;
5804
5805 if (locsyms == NULL)
5806 {
5807 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5808 if (locsyms == NULL)
5809 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5810 symtab_hdr->sh_info,
5811 0, NULL, NULL, NULL);
5812 if (locsyms == NULL)
5813 return FALSE;
5814 *locsymsp = locsyms;
5815 }
5816 sym = locsyms + r_symndx;
5817
5818 if (hp != NULL)
5819 *hp = NULL;
5820
5821 if (symp != NULL)
5822 *symp = sym;
5823
5824 if (symsecp != NULL)
5825 {
5826 asection *symsec = NULL;
5827 if ((sym->st_shndx != SHN_UNDEF
5828 && sym->st_shndx < SHN_LORESERVE)
5829 || sym->st_shndx > SHN_HIRESERVE)
5830 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5831 *symsecp = symsec;
5832 }
5833
5834 if (tls_maskp != NULL)
5835 {
5836 struct got_entry **lgot_ents;
5837 char *tls_mask;
5838
5839 tls_mask = NULL;
5840 lgot_ents = elf_local_got_ents (ibfd);
5841 if (lgot_ents != NULL)
5842 {
5843 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5844 tls_mask = &lgot_masks[r_symndx];
5845 }
5846 *tls_maskp = tls_mask;
5847 }
5848 }
5849 return TRUE;
5850 }
5851
5852 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5853 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5854 type suitable for optimization, and 1 otherwise. */
5855
5856 static int
5857 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5858 Elf_Internal_Sym **locsymsp,
5859 const Elf_Internal_Rela *rel, bfd *ibfd)
5860 {
5861 unsigned long r_symndx;
5862 int next_r;
5863 struct elf_link_hash_entry *h;
5864 Elf_Internal_Sym *sym;
5865 asection *sec;
5866 bfd_vma off;
5867
5868 r_symndx = ELF64_R_SYM (rel->r_info);
5869 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5870 return 0;
5871
5872 if ((*tls_maskp != NULL && **tls_maskp != 0)
5873 || sec == NULL
5874 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5875 return 1;
5876
5877 /* Look inside a TOC section too. */
5878 if (h != NULL)
5879 {
5880 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5881 off = h->root.u.def.value;
5882 }
5883 else
5884 off = sym->st_value;
5885 off += rel->r_addend;
5886 BFD_ASSERT (off % 8 == 0);
5887 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5888 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5889 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5890 return 0;
5891 if (toc_symndx != NULL)
5892 *toc_symndx = r_symndx;
5893 if ((h == NULL
5894 || ((h->root.type == bfd_link_hash_defined
5895 || h->root.type == bfd_link_hash_defweak)
5896 && !h->def_dynamic))
5897 && (next_r == -1 || next_r == -2))
5898 return 1 - next_r;
5899 return 1;
5900 }
5901
5902 /* Adjust all global syms defined in opd sections. In gcc generated
5903 code for the old ABI, these will already have been done. */
5904
5905 static bfd_boolean
5906 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5907 {
5908 struct ppc_link_hash_entry *eh;
5909 asection *sym_sec;
5910 long *opd_adjust;
5911
5912 if (h->root.type == bfd_link_hash_indirect)
5913 return TRUE;
5914
5915 if (h->root.type == bfd_link_hash_warning)
5916 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5917
5918 if (h->root.type != bfd_link_hash_defined
5919 && h->root.type != bfd_link_hash_defweak)
5920 return TRUE;
5921
5922 eh = (struct ppc_link_hash_entry *) h;
5923 if (eh->adjust_done)
5924 return TRUE;
5925
5926 sym_sec = eh->elf.root.u.def.section;
5927 opd_adjust = get_opd_info (sym_sec);
5928 if (opd_adjust != NULL)
5929 {
5930 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5931 if (adjust == -1)
5932 {
5933 /* This entry has been deleted. */
5934 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5935 if (dsec == NULL)
5936 {
5937 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5938 if (elf_discarded_section (dsec))
5939 {
5940 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5941 break;
5942 }
5943 }
5944 eh->elf.root.u.def.value = 0;
5945 eh->elf.root.u.def.section = dsec;
5946 }
5947 else
5948 eh->elf.root.u.def.value += adjust;
5949 eh->adjust_done = 1;
5950 }
5951 return TRUE;
5952 }
5953
5954 /* Handles decrementing dynamic reloc counts for the reloc specified by
5955 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
5956 have already been determined. */
5957
5958 static bfd_boolean
5959 dec_dynrel_count (bfd_vma r_info,
5960 asection *sec,
5961 struct bfd_link_info *info,
5962 Elf_Internal_Sym **local_syms,
5963 struct elf_link_hash_entry *h,
5964 asection *sym_sec)
5965 {
5966 enum elf_ppc64_reloc_type r_type;
5967 struct ppc_dyn_relocs *p;
5968 struct ppc_dyn_relocs **pp;
5969
5970 /* Can this reloc be dynamic? This switch, and later tests here
5971 should be kept in sync with the code in check_relocs. */
5972 r_type = ELF64_R_TYPE (r_info);
5973 switch (r_type)
5974 {
5975 default:
5976 return TRUE;
5977
5978 case R_PPC64_TPREL16:
5979 case R_PPC64_TPREL16_LO:
5980 case R_PPC64_TPREL16_HI:
5981 case R_PPC64_TPREL16_HA:
5982 case R_PPC64_TPREL16_DS:
5983 case R_PPC64_TPREL16_LO_DS:
5984 case R_PPC64_TPREL16_HIGHER:
5985 case R_PPC64_TPREL16_HIGHERA:
5986 case R_PPC64_TPREL16_HIGHEST:
5987 case R_PPC64_TPREL16_HIGHESTA:
5988 if (!info->shared)
5989 return TRUE;
5990
5991 case R_PPC64_TPREL64:
5992 case R_PPC64_DTPMOD64:
5993 case R_PPC64_DTPREL64:
5994 case R_PPC64_ADDR64:
5995 case R_PPC64_REL30:
5996 case R_PPC64_REL32:
5997 case R_PPC64_REL64:
5998 case R_PPC64_ADDR14:
5999 case R_PPC64_ADDR14_BRNTAKEN:
6000 case R_PPC64_ADDR14_BRTAKEN:
6001 case R_PPC64_ADDR16:
6002 case R_PPC64_ADDR16_DS:
6003 case R_PPC64_ADDR16_HA:
6004 case R_PPC64_ADDR16_HI:
6005 case R_PPC64_ADDR16_HIGHER:
6006 case R_PPC64_ADDR16_HIGHERA:
6007 case R_PPC64_ADDR16_HIGHEST:
6008 case R_PPC64_ADDR16_HIGHESTA:
6009 case R_PPC64_ADDR16_LO:
6010 case R_PPC64_ADDR16_LO_DS:
6011 case R_PPC64_ADDR24:
6012 case R_PPC64_ADDR32:
6013 case R_PPC64_UADDR16:
6014 case R_PPC64_UADDR32:
6015 case R_PPC64_UADDR64:
6016 case R_PPC64_TOC:
6017 break;
6018 }
6019
6020 if (local_syms != NULL)
6021 {
6022 unsigned long r_symndx;
6023 Elf_Internal_Sym *sym;
6024 bfd *ibfd = sec->owner;
6025
6026 r_symndx = ELF64_R_SYM (r_info);
6027 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6028 return FALSE;
6029 }
6030
6031 if ((info->shared
6032 && (MUST_BE_DYN_RELOC (r_type)
6033 || (h != NULL
6034 && (!info->symbolic
6035 || h->root.type == bfd_link_hash_defweak
6036 || !h->def_regular))))
6037 || (ELIMINATE_COPY_RELOCS
6038 && !info->shared
6039 && h != NULL
6040 && (h->root.type == bfd_link_hash_defweak
6041 || !h->def_regular)))
6042 ;
6043 else
6044 return TRUE;
6045
6046 if (h != NULL)
6047 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6048 else if (sym_sec != NULL)
6049 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6050 else
6051 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6052
6053 while ((p = *pp) != NULL)
6054 {
6055 if (p->sec == sec)
6056 {
6057 if (!MUST_BE_DYN_RELOC (r_type))
6058 p->pc_count -= 1;
6059 p->count -= 1;
6060 if (p->count == 0)
6061 *pp = p->next;
6062 return TRUE;
6063 }
6064 pp = &p->next;
6065 }
6066
6067 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6068 sec->owner, sec);
6069 bfd_set_error (bfd_error_bad_value);
6070 return FALSE;
6071 }
6072
6073 /* Remove unused Official Procedure Descriptor entries. Currently we
6074 only remove those associated with functions in discarded link-once
6075 sections, or weakly defined functions that have been overridden. It
6076 would be possible to remove many more entries for statically linked
6077 applications. */
6078
6079 bfd_boolean
6080 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6081 bfd_boolean non_overlapping)
6082 {
6083 bfd *ibfd;
6084 bfd_boolean some_edited = FALSE;
6085 asection *need_pad = NULL;
6086
6087 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6088 {
6089 asection *sec;
6090 Elf_Internal_Rela *relstart, *rel, *relend;
6091 Elf_Internal_Shdr *symtab_hdr;
6092 Elf_Internal_Sym *local_syms;
6093 struct elf_link_hash_entry **sym_hashes;
6094 bfd_vma offset;
6095 bfd_size_type amt;
6096 long *opd_adjust;
6097 bfd_boolean need_edit, add_aux_fields;
6098 bfd_size_type cnt_16b = 0;
6099
6100 sec = bfd_get_section_by_name (ibfd, ".opd");
6101 if (sec == NULL)
6102 continue;
6103
6104 amt = sec->size * sizeof (long) / 8;
6105 opd_adjust = get_opd_info (sec);
6106 if (opd_adjust == NULL)
6107 {
6108 /* check_relocs hasn't been called. Must be a ld -r link
6109 or --just-symbols object. */
6110 opd_adjust = bfd_zalloc (obfd, amt);
6111 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6112 }
6113 memset (opd_adjust, 0, amt);
6114
6115 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6116 continue;
6117
6118 if (sec->output_section == bfd_abs_section_ptr)
6119 continue;
6120
6121 /* Look through the section relocs. */
6122 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6123 continue;
6124
6125 local_syms = NULL;
6126 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6127 sym_hashes = elf_sym_hashes (ibfd);
6128
6129 /* Read the relocations. */
6130 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6131 info->keep_memory);
6132 if (relstart == NULL)
6133 return FALSE;
6134
6135 /* First run through the relocs to check they are sane, and to
6136 determine whether we need to edit this opd section. */
6137 need_edit = FALSE;
6138 need_pad = sec;
6139 offset = 0;
6140 relend = relstart + sec->reloc_count;
6141 for (rel = relstart; rel < relend; )
6142 {
6143 enum elf_ppc64_reloc_type r_type;
6144 unsigned long r_symndx;
6145 asection *sym_sec;
6146 struct elf_link_hash_entry *h;
6147 Elf_Internal_Sym *sym;
6148
6149 /* .opd contains a regular array of 16 or 24 byte entries. We're
6150 only interested in the reloc pointing to a function entry
6151 point. */
6152 if (rel->r_offset != offset
6153 || rel + 1 >= relend
6154 || (rel + 1)->r_offset != offset + 8)
6155 {
6156 /* If someone messes with .opd alignment then after a
6157 "ld -r" we might have padding in the middle of .opd.
6158 Also, there's nothing to prevent someone putting
6159 something silly in .opd with the assembler. No .opd
6160 optimization for them! */
6161 broken_opd:
6162 (*_bfd_error_handler)
6163 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6164 need_edit = FALSE;
6165 break;
6166 }
6167
6168 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6169 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6170 {
6171 (*_bfd_error_handler)
6172 (_("%B: unexpected reloc type %u in .opd section"),
6173 ibfd, r_type);
6174 need_edit = FALSE;
6175 break;
6176 }
6177
6178 r_symndx = ELF64_R_SYM (rel->r_info);
6179 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6180 r_symndx, ibfd))
6181 goto error_ret;
6182
6183 if (sym_sec == NULL || sym_sec->owner == NULL)
6184 {
6185 const char *sym_name;
6186 if (h != NULL)
6187 sym_name = h->root.root.string;
6188 else
6189 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6190 sym_sec);
6191
6192 (*_bfd_error_handler)
6193 (_("%B: undefined sym `%s' in .opd section"),
6194 ibfd, sym_name);
6195 need_edit = FALSE;
6196 break;
6197 }
6198
6199 /* opd entries are always for functions defined in the
6200 current input bfd. If the symbol isn't defined in the
6201 input bfd, then we won't be using the function in this
6202 bfd; It must be defined in a linkonce section in another
6203 bfd, or is weak. It's also possible that we are
6204 discarding the function due to a linker script /DISCARD/,
6205 which we test for via the output_section. */
6206 if (sym_sec->owner != ibfd
6207 || sym_sec->output_section == bfd_abs_section_ptr)
6208 need_edit = TRUE;
6209
6210 rel += 2;
6211 if (rel == relend
6212 || (rel + 1 == relend && rel->r_offset == offset + 16))
6213 {
6214 if (sec->size == offset + 24)
6215 {
6216 need_pad = NULL;
6217 break;
6218 }
6219 if (rel == relend && sec->size == offset + 16)
6220 {
6221 cnt_16b++;
6222 break;
6223 }
6224 goto broken_opd;
6225 }
6226
6227 if (rel->r_offset == offset + 24)
6228 offset += 24;
6229 else if (rel->r_offset != offset + 16)
6230 goto broken_opd;
6231 else if (rel + 1 < relend
6232 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6233 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6234 {
6235 offset += 16;
6236 cnt_16b++;
6237 }
6238 else if (rel + 2 < relend
6239 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6240 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6241 {
6242 offset += 24;
6243 rel += 1;
6244 }
6245 else
6246 goto broken_opd;
6247 }
6248
6249 add_aux_fields = non_overlapping && cnt_16b > 0;
6250
6251 if (need_edit || add_aux_fields)
6252 {
6253 Elf_Internal_Rela *write_rel;
6254 bfd_byte *rptr, *wptr;
6255 bfd_byte *new_contents = NULL;
6256 bfd_boolean skip;
6257 long opd_ent_size;
6258
6259 /* This seems a waste of time as input .opd sections are all
6260 zeros as generated by gcc, but I suppose there's no reason
6261 this will always be so. We might start putting something in
6262 the third word of .opd entries. */
6263 if ((sec->flags & SEC_IN_MEMORY) == 0)
6264 {
6265 bfd_byte *loc;
6266 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6267 {
6268 if (loc != NULL)
6269 free (loc);
6270 error_ret:
6271 if (local_syms != NULL
6272 && symtab_hdr->contents != (unsigned char *) local_syms)
6273 free (local_syms);
6274 if (elf_section_data (sec)->relocs != relstart)
6275 free (relstart);
6276 return FALSE;
6277 }
6278 sec->contents = loc;
6279 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6280 }
6281
6282 elf_section_data (sec)->relocs = relstart;
6283
6284 wptr = sec->contents;
6285 rptr = sec->contents;
6286 new_contents = sec->contents;
6287
6288 if (add_aux_fields)
6289 {
6290 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6291 if (new_contents == NULL)
6292 return FALSE;
6293 need_pad = FALSE;
6294 wptr = new_contents;
6295 }
6296
6297 write_rel = relstart;
6298 skip = FALSE;
6299 offset = 0;
6300 opd_ent_size = 0;
6301 for (rel = relstart; rel < relend; rel++)
6302 {
6303 unsigned long r_symndx;
6304 asection *sym_sec;
6305 struct elf_link_hash_entry *h;
6306 Elf_Internal_Sym *sym;
6307
6308 r_symndx = ELF64_R_SYM (rel->r_info);
6309 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6310 r_symndx, ibfd))
6311 goto error_ret;
6312
6313 if (rel->r_offset == offset)
6314 {
6315 struct ppc_link_hash_entry *fdh = NULL;
6316
6317 /* See if the .opd entry is full 24 byte or
6318 16 byte (with fd_aux entry overlapped with next
6319 fd_func). */
6320 opd_ent_size = 24;
6321 if ((rel + 2 == relend && sec->size == offset + 16)
6322 || (rel + 3 < relend
6323 && rel[2].r_offset == offset + 16
6324 && rel[3].r_offset == offset + 24
6325 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6326 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6327 opd_ent_size = 16;
6328
6329 if (h != NULL
6330 && h->root.root.string[0] == '.')
6331 {
6332 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6333 ppc_hash_table (info));
6334 if (fdh != NULL
6335 && fdh->elf.root.type != bfd_link_hash_defined
6336 && fdh->elf.root.type != bfd_link_hash_defweak)
6337 fdh = NULL;
6338 }
6339
6340 skip = (sym_sec->owner != ibfd
6341 || sym_sec->output_section == bfd_abs_section_ptr);
6342 if (skip)
6343 {
6344 if (fdh != NULL && sym_sec->owner == ibfd)
6345 {
6346 /* Arrange for the function descriptor sym
6347 to be dropped. */
6348 fdh->elf.root.u.def.value = 0;
6349 fdh->elf.root.u.def.section = sym_sec;
6350 }
6351 opd_adjust[rel->r_offset / 8] = -1;
6352 }
6353 else
6354 {
6355 /* We'll be keeping this opd entry. */
6356
6357 if (fdh != NULL)
6358 {
6359 /* Redefine the function descriptor symbol to
6360 this location in the opd section. It is
6361 necessary to update the value here rather
6362 than using an array of adjustments as we do
6363 for local symbols, because various places
6364 in the generic ELF code use the value
6365 stored in u.def.value. */
6366 fdh->elf.root.u.def.value = wptr - new_contents;
6367 fdh->adjust_done = 1;
6368 }
6369
6370 /* Local syms are a bit tricky. We could
6371 tweak them as they can be cached, but
6372 we'd need to look through the local syms
6373 for the function descriptor sym which we
6374 don't have at the moment. So keep an
6375 array of adjustments. */
6376 opd_adjust[rel->r_offset / 8]
6377 = (wptr - new_contents) - (rptr - sec->contents);
6378
6379 if (wptr != rptr)
6380 memcpy (wptr, rptr, opd_ent_size);
6381 wptr += opd_ent_size;
6382 if (add_aux_fields && opd_ent_size == 16)
6383 {
6384 memset (wptr, '\0', 8);
6385 wptr += 8;
6386 }
6387 }
6388 rptr += opd_ent_size;
6389 offset += opd_ent_size;
6390 }
6391
6392 if (skip)
6393 {
6394 if (!dec_dynrel_count (rel->r_info, sec, info,
6395 NULL, h, sym_sec))
6396 goto error_ret;
6397 }
6398 else
6399 {
6400 /* We need to adjust any reloc offsets to point to the
6401 new opd entries. While we're at it, we may as well
6402 remove redundant relocs. */
6403 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6404 if (write_rel != rel)
6405 memcpy (write_rel, rel, sizeof (*rel));
6406 ++write_rel;
6407 }
6408 }
6409
6410 sec->size = wptr - new_contents;
6411 sec->reloc_count = write_rel - relstart;
6412 if (add_aux_fields)
6413 {
6414 free (sec->contents);
6415 sec->contents = new_contents;
6416 }
6417
6418 /* Fudge the size too, as this is used later in
6419 elf_bfd_final_link if we are emitting relocs. */
6420 elf_section_data (sec)->rel_hdr.sh_size
6421 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6422 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6423 some_edited = TRUE;
6424 }
6425 else if (elf_section_data (sec)->relocs != relstart)
6426 free (relstart);
6427
6428 if (local_syms != NULL
6429 && symtab_hdr->contents != (unsigned char *) local_syms)
6430 {
6431 if (!info->keep_memory)
6432 free (local_syms);
6433 else
6434 symtab_hdr->contents = (unsigned char *) local_syms;
6435 }
6436 }
6437
6438 if (some_edited)
6439 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6440
6441 /* If we are doing a final link and the last .opd entry is just 16 byte
6442 long, add a 8 byte padding after it. */
6443 if (need_pad != NULL && !info->relocatable)
6444 {
6445 bfd_byte *p;
6446
6447 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6448 {
6449 BFD_ASSERT (need_pad->size > 0);
6450
6451 p = bfd_malloc (need_pad->size + 8);
6452 if (p == NULL)
6453 return FALSE;
6454
6455 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6456 p, 0, need_pad->size))
6457 return FALSE;
6458
6459 need_pad->contents = p;
6460 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6461 }
6462 else
6463 {
6464 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6465 if (p == NULL)
6466 return FALSE;
6467
6468 need_pad->contents = p;
6469 }
6470
6471 memset (need_pad->contents + need_pad->size, 0, 8);
6472 need_pad->size += 8;
6473 }
6474
6475 return TRUE;
6476 }
6477
6478 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6479
6480 asection *
6481 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6482 {
6483 struct ppc_link_hash_table *htab;
6484
6485 htab = ppc_hash_table (info);
6486 if (htab->tls_get_addr != NULL)
6487 {
6488 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6489
6490 while (h->elf.root.type == bfd_link_hash_indirect
6491 || h->elf.root.type == bfd_link_hash_warning)
6492 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6493
6494 htab->tls_get_addr = h;
6495
6496 if (htab->tls_get_addr_fd == NULL
6497 && h->oh != NULL
6498 && h->oh->is_func_descriptor
6499 && (h->oh->elf.root.type == bfd_link_hash_defined
6500 || h->oh->elf.root.type == bfd_link_hash_defweak))
6501 htab->tls_get_addr_fd = h->oh;
6502 }
6503
6504 if (htab->tls_get_addr_fd != NULL)
6505 {
6506 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6507
6508 while (h->elf.root.type == bfd_link_hash_indirect
6509 || h->elf.root.type == bfd_link_hash_warning)
6510 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6511
6512 htab->tls_get_addr_fd = h;
6513 }
6514
6515 return _bfd_elf_tls_setup (obfd, info);
6516 }
6517
6518 /* Run through all the TLS relocs looking for optimization
6519 opportunities. The linker has been hacked (see ppc64elf.em) to do
6520 a preliminary section layout so that we know the TLS segment
6521 offsets. We can't optimize earlier because some optimizations need
6522 to know the tp offset, and we need to optimize before allocating
6523 dynamic relocations. */
6524
6525 bfd_boolean
6526 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6527 {
6528 bfd *ibfd;
6529 asection *sec;
6530 struct ppc_link_hash_table *htab;
6531
6532 if (info->relocatable || info->shared)
6533 return TRUE;
6534
6535 htab = ppc_hash_table (info);
6536 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6537 {
6538 Elf_Internal_Sym *locsyms = NULL;
6539
6540 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6541 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6542 {
6543 Elf_Internal_Rela *relstart, *rel, *relend;
6544 int expecting_tls_get_addr;
6545
6546 /* Read the relocations. */
6547 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6548 info->keep_memory);
6549 if (relstart == NULL)
6550 return FALSE;
6551
6552 expecting_tls_get_addr = 0;
6553 relend = relstart + sec->reloc_count;
6554 for (rel = relstart; rel < relend; rel++)
6555 {
6556 enum elf_ppc64_reloc_type r_type;
6557 unsigned long r_symndx;
6558 struct elf_link_hash_entry *h;
6559 Elf_Internal_Sym *sym;
6560 asection *sym_sec;
6561 char *tls_mask;
6562 char tls_set, tls_clear, tls_type = 0;
6563 bfd_vma value;
6564 bfd_boolean ok_tprel, is_local;
6565
6566 r_symndx = ELF64_R_SYM (rel->r_info);
6567 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6568 r_symndx, ibfd))
6569 {
6570 err_free_rel:
6571 if (elf_section_data (sec)->relocs != relstart)
6572 free (relstart);
6573 if (locsyms != NULL
6574 && (elf_tdata (ibfd)->symtab_hdr.contents
6575 != (unsigned char *) locsyms))
6576 free (locsyms);
6577 return FALSE;
6578 }
6579
6580 if (h != NULL)
6581 {
6582 if (h->root.type != bfd_link_hash_defined
6583 && h->root.type != bfd_link_hash_defweak)
6584 continue;
6585 value = h->root.u.def.value;
6586 }
6587 else
6588 /* Symbols referenced by TLS relocs must be of type
6589 STT_TLS. So no need for .opd local sym adjust. */
6590 value = sym->st_value;
6591
6592 ok_tprel = FALSE;
6593 is_local = FALSE;
6594 if (h == NULL
6595 || !h->def_dynamic)
6596 {
6597 is_local = TRUE;
6598 value += sym_sec->output_offset;
6599 value += sym_sec->output_section->vma;
6600 value -= htab->elf.tls_sec->vma;
6601 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6602 < (bfd_vma) 1 << 32);
6603 }
6604
6605 r_type = ELF64_R_TYPE (rel->r_info);
6606 switch (r_type)
6607 {
6608 case R_PPC64_GOT_TLSLD16:
6609 case R_PPC64_GOT_TLSLD16_LO:
6610 case R_PPC64_GOT_TLSLD16_HI:
6611 case R_PPC64_GOT_TLSLD16_HA:
6612 /* These relocs should never be against a symbol
6613 defined in a shared lib. Leave them alone if
6614 that turns out to be the case. */
6615 ppc64_tlsld_got (ibfd)->refcount -= 1;
6616 if (!is_local)
6617 continue;
6618
6619 /* LD -> LE */
6620 tls_set = 0;
6621 tls_clear = TLS_LD;
6622 tls_type = TLS_TLS | TLS_LD;
6623 expecting_tls_get_addr = 1;
6624 break;
6625
6626 case R_PPC64_GOT_TLSGD16:
6627 case R_PPC64_GOT_TLSGD16_LO:
6628 case R_PPC64_GOT_TLSGD16_HI:
6629 case R_PPC64_GOT_TLSGD16_HA:
6630 if (ok_tprel)
6631 /* GD -> LE */
6632 tls_set = 0;
6633 else
6634 /* GD -> IE */
6635 tls_set = TLS_TLS | TLS_TPRELGD;
6636 tls_clear = TLS_GD;
6637 tls_type = TLS_TLS | TLS_GD;
6638 expecting_tls_get_addr = 1;
6639 break;
6640
6641 case R_PPC64_GOT_TPREL16_DS:
6642 case R_PPC64_GOT_TPREL16_LO_DS:
6643 case R_PPC64_GOT_TPREL16_HI:
6644 case R_PPC64_GOT_TPREL16_HA:
6645 expecting_tls_get_addr = 0;
6646 if (ok_tprel)
6647 {
6648 /* IE -> LE */
6649 tls_set = 0;
6650 tls_clear = TLS_TPREL;
6651 tls_type = TLS_TLS | TLS_TPREL;
6652 break;
6653 }
6654 else
6655 continue;
6656
6657 case R_PPC64_REL14:
6658 case R_PPC64_REL14_BRTAKEN:
6659 case R_PPC64_REL14_BRNTAKEN:
6660 case R_PPC64_REL24:
6661 if (h != NULL
6662 && (h == &htab->tls_get_addr->elf
6663 || h == &htab->tls_get_addr_fd->elf))
6664 {
6665 if (!expecting_tls_get_addr
6666 && rel != relstart
6667 && ((ELF64_R_TYPE (rel[-1].r_info)
6668 == R_PPC64_TOC16)
6669 || (ELF64_R_TYPE (rel[-1].r_info)
6670 == R_PPC64_TOC16_LO)))
6671 {
6672 /* Check for toc tls entries. */
6673 char *toc_tls;
6674 int retval;
6675
6676 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6677 rel - 1, ibfd);
6678 if (retval == 0)
6679 goto err_free_rel;
6680 if (toc_tls != NULL)
6681 expecting_tls_get_addr = retval > 1;
6682 }
6683
6684 if (expecting_tls_get_addr)
6685 {
6686 struct plt_entry *ent;
6687 for (ent = h->plt.plist; ent; ent = ent->next)
6688 if (ent->addend == 0)
6689 {
6690 if (ent->plt.refcount > 0)
6691 ent->plt.refcount -= 1;
6692 break;
6693 }
6694 }
6695 }
6696 expecting_tls_get_addr = 0;
6697 continue;
6698
6699 case R_PPC64_TPREL64:
6700 expecting_tls_get_addr = 0;
6701 if (ok_tprel)
6702 {
6703 /* IE -> LE */
6704 tls_set = TLS_EXPLICIT;
6705 tls_clear = TLS_TPREL;
6706 break;
6707 }
6708 else
6709 continue;
6710
6711 case R_PPC64_DTPMOD64:
6712 expecting_tls_get_addr = 0;
6713 if (rel + 1 < relend
6714 && (rel[1].r_info
6715 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6716 && rel[1].r_offset == rel->r_offset + 8)
6717 {
6718 if (ok_tprel)
6719 /* GD -> LE */
6720 tls_set = TLS_EXPLICIT | TLS_GD;
6721 else
6722 /* GD -> IE */
6723 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6724 tls_clear = TLS_GD;
6725 }
6726 else
6727 {
6728 if (!is_local)
6729 continue;
6730
6731 /* LD -> LE */
6732 tls_set = TLS_EXPLICIT;
6733 tls_clear = TLS_LD;
6734 }
6735 break;
6736
6737 default:
6738 expecting_tls_get_addr = 0;
6739 continue;
6740 }
6741
6742 if ((tls_set & TLS_EXPLICIT) == 0)
6743 {
6744 struct got_entry *ent;
6745
6746 /* Adjust got entry for this reloc. */
6747 if (h != NULL)
6748 ent = h->got.glist;
6749 else
6750 ent = elf_local_got_ents (ibfd)[r_symndx];
6751
6752 for (; ent != NULL; ent = ent->next)
6753 if (ent->addend == rel->r_addend
6754 && ent->owner == ibfd
6755 && ent->tls_type == tls_type)
6756 break;
6757 if (ent == NULL)
6758 abort ();
6759
6760 if (tls_set == 0)
6761 {
6762 /* We managed to get rid of a got entry. */
6763 if (ent->got.refcount > 0)
6764 ent->got.refcount -= 1;
6765 }
6766 }
6767 else
6768 {
6769 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6770 we'll lose one or two dyn relocs. */
6771 if (!dec_dynrel_count (rel->r_info, sec, info,
6772 NULL, h, sym_sec))
6773 return FALSE;
6774
6775 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6776 {
6777 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6778 NULL, h, sym_sec))
6779 return FALSE;
6780 }
6781 }
6782
6783 *tls_mask |= tls_set;
6784 *tls_mask &= ~tls_clear;
6785 }
6786
6787 if (elf_section_data (sec)->relocs != relstart)
6788 free (relstart);
6789 }
6790
6791 if (locsyms != NULL
6792 && (elf_tdata (ibfd)->symtab_hdr.contents
6793 != (unsigned char *) locsyms))
6794 {
6795 if (!info->keep_memory)
6796 free (locsyms);
6797 else
6798 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6799 }
6800 }
6801 return TRUE;
6802 }
6803
6804 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6805 the values of any global symbols in a toc section that has been
6806 edited. Globals in toc sections should be a rarity, so this function
6807 sets a flag if any are found in toc sections other than the one just
6808 edited, so that futher hash table traversals can be avoided. */
6809
6810 struct adjust_toc_info
6811 {
6812 asection *toc;
6813 unsigned long *skip;
6814 bfd_boolean global_toc_syms;
6815 };
6816
6817 static bfd_boolean
6818 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6819 {
6820 struct ppc_link_hash_entry *eh;
6821 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6822
6823 if (h->root.type == bfd_link_hash_indirect)
6824 return TRUE;
6825
6826 if (h->root.type == bfd_link_hash_warning)
6827 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6828
6829 if (h->root.type != bfd_link_hash_defined
6830 && h->root.type != bfd_link_hash_defweak)
6831 return TRUE;
6832
6833 eh = (struct ppc_link_hash_entry *) h;
6834 if (eh->adjust_done)
6835 return TRUE;
6836
6837 if (eh->elf.root.u.def.section == toc_inf->toc)
6838 {
6839 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6840 if (skip != (unsigned long) -1)
6841 eh->elf.root.u.def.value -= skip;
6842 else
6843 {
6844 (*_bfd_error_handler)
6845 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6846 eh->elf.root.u.def.section = &bfd_abs_section;
6847 eh->elf.root.u.def.value = 0;
6848 }
6849 eh->adjust_done = 1;
6850 }
6851 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6852 toc_inf->global_toc_syms = TRUE;
6853
6854 return TRUE;
6855 }
6856
6857 /* Examine all relocs referencing .toc sections in order to remove
6858 unused .toc entries. */
6859
6860 bfd_boolean
6861 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6862 {
6863 bfd *ibfd;
6864 struct adjust_toc_info toc_inf;
6865
6866 toc_inf.global_toc_syms = TRUE;
6867 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6868 {
6869 asection *toc, *sec;
6870 Elf_Internal_Shdr *symtab_hdr;
6871 Elf_Internal_Sym *local_syms;
6872 struct elf_link_hash_entry **sym_hashes;
6873 Elf_Internal_Rela *relstart, *rel;
6874 unsigned long *skip, *drop;
6875 unsigned char *used;
6876 unsigned char *keep, last, some_unused;
6877
6878 toc = bfd_get_section_by_name (ibfd, ".toc");
6879 if (toc == NULL
6880 || toc->size == 0
6881 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6882 || elf_discarded_section (toc))
6883 continue;
6884
6885 local_syms = NULL;
6886 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6887 sym_hashes = elf_sym_hashes (ibfd);
6888
6889 /* Look at sections dropped from the final link. */
6890 skip = NULL;
6891 relstart = NULL;
6892 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6893 {
6894 if (sec->reloc_count == 0
6895 || !elf_discarded_section (sec)
6896 || get_opd_info (sec)
6897 || (sec->flags & SEC_ALLOC) == 0
6898 || (sec->flags & SEC_DEBUGGING) != 0)
6899 continue;
6900
6901 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6902 if (relstart == NULL)
6903 goto error_ret;
6904
6905 /* Run through the relocs to see which toc entries might be
6906 unused. */
6907 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6908 {
6909 enum elf_ppc64_reloc_type r_type;
6910 unsigned long r_symndx;
6911 asection *sym_sec;
6912 struct elf_link_hash_entry *h;
6913 Elf_Internal_Sym *sym;
6914 bfd_vma val;
6915
6916 r_type = ELF64_R_TYPE (rel->r_info);
6917 switch (r_type)
6918 {
6919 default:
6920 continue;
6921
6922 case R_PPC64_TOC16:
6923 case R_PPC64_TOC16_LO:
6924 case R_PPC64_TOC16_HI:
6925 case R_PPC64_TOC16_HA:
6926 case R_PPC64_TOC16_DS:
6927 case R_PPC64_TOC16_LO_DS:
6928 break;
6929 }
6930
6931 r_symndx = ELF64_R_SYM (rel->r_info);
6932 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6933 r_symndx, ibfd))
6934 goto error_ret;
6935
6936 if (sym_sec != toc)
6937 continue;
6938
6939 if (h != NULL)
6940 val = h->root.u.def.value;
6941 else
6942 val = sym->st_value;
6943 val += rel->r_addend;
6944
6945 if (val >= toc->size)
6946 continue;
6947
6948 /* Anything in the toc ought to be aligned to 8 bytes.
6949 If not, don't mark as unused. */
6950 if (val & 7)
6951 continue;
6952
6953 if (skip == NULL)
6954 {
6955 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6956 if (skip == NULL)
6957 goto error_ret;
6958 }
6959
6960 skip[val >> 3] = 1;
6961 }
6962
6963 if (elf_section_data (sec)->relocs != relstart)
6964 free (relstart);
6965 }
6966
6967 if (skip == NULL)
6968 continue;
6969
6970 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6971 if (used == NULL)
6972 {
6973 error_ret:
6974 if (local_syms != NULL
6975 && symtab_hdr->contents != (unsigned char *) local_syms)
6976 free (local_syms);
6977 if (sec != NULL
6978 && relstart != NULL
6979 && elf_section_data (sec)->relocs != relstart)
6980 free (relstart);
6981 if (skip != NULL)
6982 free (skip);
6983 return FALSE;
6984 }
6985
6986 /* Now check all kept sections that might reference the toc. */
6987 for (sec = ibfd->sections;
6988 sec != NULL;
6989 /* Check the toc itself last. */
6990 sec = (sec == toc ? NULL
6991 : sec->next == toc && sec->next->next ? sec->next->next
6992 : sec->next == NULL ? toc
6993 : sec->next))
6994 {
6995 int repeat;
6996
6997 if (sec->reloc_count == 0
6998 || elf_discarded_section (sec)
6999 || get_opd_info (sec)
7000 || (sec->flags & SEC_ALLOC) == 0
7001 || (sec->flags & SEC_DEBUGGING) != 0)
7002 continue;
7003
7004 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7005 if (relstart == NULL)
7006 goto error_ret;
7007
7008 /* Mark toc entries referenced as used. */
7009 repeat = 0;
7010 do
7011 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7012 {
7013 enum elf_ppc64_reloc_type r_type;
7014 unsigned long r_symndx;
7015 asection *sym_sec;
7016 struct elf_link_hash_entry *h;
7017 Elf_Internal_Sym *sym;
7018 bfd_vma val;
7019
7020 r_type = ELF64_R_TYPE (rel->r_info);
7021 switch (r_type)
7022 {
7023 case R_PPC64_TOC16:
7024 case R_PPC64_TOC16_LO:
7025 case R_PPC64_TOC16_HI:
7026 case R_PPC64_TOC16_HA:
7027 case R_PPC64_TOC16_DS:
7028 case R_PPC64_TOC16_LO_DS:
7029 /* In case we're taking addresses of toc entries. */
7030 case R_PPC64_ADDR64:
7031 break;
7032
7033 default:
7034 continue;
7035 }
7036
7037 r_symndx = ELF64_R_SYM (rel->r_info);
7038 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7039 r_symndx, ibfd))
7040 {
7041 free (used);
7042 goto error_ret;
7043 }
7044
7045 if (sym_sec != toc)
7046 continue;
7047
7048 if (h != NULL)
7049 val = h->root.u.def.value;
7050 else
7051 val = sym->st_value;
7052 val += rel->r_addend;
7053
7054 if (val >= toc->size)
7055 continue;
7056
7057 /* For the toc section, we only mark as used if
7058 this entry itself isn't unused. */
7059 if (sec == toc
7060 && !used[val >> 3]
7061 && (used[rel->r_offset >> 3]
7062 || !skip[rel->r_offset >> 3]))
7063 /* Do all the relocs again, to catch reference
7064 chains. */
7065 repeat = 1;
7066
7067 used[val >> 3] = 1;
7068 }
7069 while (repeat);
7070 }
7071
7072 /* Merge the used and skip arrays. Assume that TOC
7073 doublewords not appearing as either used or unused belong
7074 to to an entry more than one doubleword in size. */
7075 for (drop = skip, keep = used, last = 0, some_unused = 0;
7076 drop < skip + (toc->size + 7) / 8;
7077 ++drop, ++keep)
7078 {
7079 if (*keep)
7080 {
7081 *drop = 0;
7082 last = 0;
7083 }
7084 else if (*drop)
7085 {
7086 some_unused = 1;
7087 last = 1;
7088 }
7089 else
7090 *drop = last;
7091 }
7092
7093 free (used);
7094
7095 if (some_unused)
7096 {
7097 bfd_byte *contents, *src;
7098 unsigned long off;
7099
7100 /* Shuffle the toc contents, and at the same time convert the
7101 skip array from booleans into offsets. */
7102 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7103 goto error_ret;
7104
7105 elf_section_data (toc)->this_hdr.contents = contents;
7106
7107 for (src = contents, off = 0, drop = skip;
7108 src < contents + toc->size;
7109 src += 8, ++drop)
7110 {
7111 if (*drop)
7112 {
7113 *drop = (unsigned long) -1;
7114 off += 8;
7115 }
7116 else if (off != 0)
7117 {
7118 *drop = off;
7119 memcpy (src - off, src, 8);
7120 }
7121 }
7122 toc->rawsize = toc->size;
7123 toc->size = src - contents - off;
7124
7125 if (toc->reloc_count != 0)
7126 {
7127 Elf_Internal_Rela *wrel;
7128 bfd_size_type sz;
7129
7130 /* Read toc relocs. */
7131 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7132 TRUE);
7133 if (relstart == NULL)
7134 goto error_ret;
7135
7136 /* Remove unused toc relocs, and adjust those we keep. */
7137 wrel = relstart;
7138 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7139 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7140 {
7141 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7142 wrel->r_info = rel->r_info;
7143 wrel->r_addend = rel->r_addend;
7144 ++wrel;
7145 }
7146 else if (!dec_dynrel_count (rel->r_info, toc, info,
7147 &local_syms, NULL, NULL))
7148 goto error_ret;
7149
7150 toc->reloc_count = wrel - relstart;
7151 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7152 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7153 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7154 }
7155
7156 /* Adjust addends for relocs against the toc section sym. */
7157 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7158 {
7159 if (sec->reloc_count == 0
7160 || elf_discarded_section (sec))
7161 continue;
7162
7163 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7164 TRUE);
7165 if (relstart == NULL)
7166 goto error_ret;
7167
7168 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7169 {
7170 enum elf_ppc64_reloc_type r_type;
7171 unsigned long r_symndx;
7172 asection *sym_sec;
7173 struct elf_link_hash_entry *h;
7174 Elf_Internal_Sym *sym;
7175
7176 r_type = ELF64_R_TYPE (rel->r_info);
7177 switch (r_type)
7178 {
7179 default:
7180 continue;
7181
7182 case R_PPC64_TOC16:
7183 case R_PPC64_TOC16_LO:
7184 case R_PPC64_TOC16_HI:
7185 case R_PPC64_TOC16_HA:
7186 case R_PPC64_TOC16_DS:
7187 case R_PPC64_TOC16_LO_DS:
7188 case R_PPC64_ADDR64:
7189 break;
7190 }
7191
7192 r_symndx = ELF64_R_SYM (rel->r_info);
7193 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7194 r_symndx, ibfd))
7195 goto error_ret;
7196
7197 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7198 continue;
7199
7200 rel->r_addend -= skip[rel->r_addend >> 3];
7201 }
7202 }
7203
7204 /* We shouldn't have local or global symbols defined in the TOC,
7205 but handle them anyway. */
7206 if (local_syms != NULL)
7207 {
7208 Elf_Internal_Sym *sym;
7209
7210 for (sym = local_syms;
7211 sym < local_syms + symtab_hdr->sh_info;
7212 ++sym)
7213 if (sym->st_shndx != SHN_UNDEF
7214 && (sym->st_shndx < SHN_LORESERVE
7215 || sym->st_shndx > SHN_HIRESERVE)
7216 && sym->st_value != 0
7217 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7218 {
7219 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7220 sym->st_value -= skip[sym->st_value >> 3];
7221 else
7222 {
7223 (*_bfd_error_handler)
7224 (_("%s defined in removed toc entry"),
7225 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7226 NULL));
7227 sym->st_value = 0;
7228 sym->st_shndx = SHN_ABS;
7229 }
7230 symtab_hdr->contents = (unsigned char *) local_syms;
7231 }
7232 }
7233
7234 /* Finally, adjust any global syms defined in the toc. */
7235 if (toc_inf.global_toc_syms)
7236 {
7237 toc_inf.toc = toc;
7238 toc_inf.skip = skip;
7239 toc_inf.global_toc_syms = FALSE;
7240 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7241 &toc_inf);
7242 }
7243 }
7244
7245 if (local_syms != NULL
7246 && symtab_hdr->contents != (unsigned char *) local_syms)
7247 {
7248 if (!info->keep_memory)
7249 free (local_syms);
7250 else
7251 symtab_hdr->contents = (unsigned char *) local_syms;
7252 }
7253 free (skip);
7254 }
7255
7256 return TRUE;
7257 }
7258
7259 /* Allocate space in .plt, .got and associated reloc sections for
7260 dynamic relocs. */
7261
7262 static bfd_boolean
7263 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7264 {
7265 struct bfd_link_info *info;
7266 struct ppc_link_hash_table *htab;
7267 asection *s;
7268 struct ppc_link_hash_entry *eh;
7269 struct ppc_dyn_relocs *p;
7270 struct got_entry *gent;
7271
7272 if (h->root.type == bfd_link_hash_indirect)
7273 return TRUE;
7274
7275 if (h->root.type == bfd_link_hash_warning)
7276 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7277
7278 info = (struct bfd_link_info *) inf;
7279 htab = ppc_hash_table (info);
7280
7281 if (htab->elf.dynamic_sections_created
7282 && h->dynindx != -1
7283 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7284 {
7285 struct plt_entry *pent;
7286 bfd_boolean doneone = FALSE;
7287 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7288 if (pent->plt.refcount > 0)
7289 {
7290 /* If this is the first .plt entry, make room for the special
7291 first entry. */
7292 s = htab->plt;
7293 if (s->size == 0)
7294 s->size += PLT_INITIAL_ENTRY_SIZE;
7295
7296 pent->plt.offset = s->size;
7297
7298 /* Make room for this entry. */
7299 s->size += PLT_ENTRY_SIZE;
7300
7301 /* Make room for the .glink code. */
7302 s = htab->glink;
7303 if (s->size == 0)
7304 s->size += GLINK_CALL_STUB_SIZE;
7305 /* We need bigger stubs past index 32767. */
7306 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7307 s->size += 4;
7308 s->size += 2*4;
7309
7310 /* We also need to make an entry in the .rela.plt section. */
7311 s = htab->relplt;
7312 s->size += sizeof (Elf64_External_Rela);
7313 doneone = TRUE;
7314 }
7315 else
7316 pent->plt.offset = (bfd_vma) -1;
7317 if (!doneone)
7318 {
7319 h->plt.plist = NULL;
7320 h->needs_plt = 0;
7321 }
7322 }
7323 else
7324 {
7325 h->plt.plist = NULL;
7326 h->needs_plt = 0;
7327 }
7328
7329 eh = (struct ppc_link_hash_entry *) h;
7330 /* Run through the TLS GD got entries first if we're changing them
7331 to TPREL. */
7332 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7333 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7334 if (gent->got.refcount > 0
7335 && (gent->tls_type & TLS_GD) != 0)
7336 {
7337 /* This was a GD entry that has been converted to TPREL. If
7338 there happens to be a TPREL entry we can use that one. */
7339 struct got_entry *ent;
7340 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7341 if (ent->got.refcount > 0
7342 && (ent->tls_type & TLS_TPREL) != 0
7343 && ent->addend == gent->addend
7344 && ent->owner == gent->owner)
7345 {
7346 gent->got.refcount = 0;
7347 break;
7348 }
7349
7350 /* If not, then we'll be using our own TPREL entry. */
7351 if (gent->got.refcount != 0)
7352 gent->tls_type = TLS_TLS | TLS_TPREL;
7353 }
7354
7355 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7356 if (gent->got.refcount > 0)
7357 {
7358 bfd_boolean dyn;
7359
7360 /* Make sure this symbol is output as a dynamic symbol.
7361 Undefined weak syms won't yet be marked as dynamic,
7362 nor will all TLS symbols. */
7363 if (h->dynindx == -1
7364 && !h->forced_local)
7365 {
7366 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7367 return FALSE;
7368 }
7369
7370 if ((gent->tls_type & TLS_LD) != 0
7371 && !h->def_dynamic)
7372 {
7373 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7374 continue;
7375 }
7376
7377 s = ppc64_elf_tdata (gent->owner)->got;
7378 gent->got.offset = s->size;
7379 s->size
7380 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7381 dyn = htab->elf.dynamic_sections_created;
7382 if ((info->shared
7383 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7384 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7385 || h->root.type != bfd_link_hash_undefweak))
7386 ppc64_elf_tdata (gent->owner)->relgot->size
7387 += (gent->tls_type & eh->tls_mask & TLS_GD
7388 ? 2 * sizeof (Elf64_External_Rela)
7389 : sizeof (Elf64_External_Rela));
7390 }
7391 else
7392 gent->got.offset = (bfd_vma) -1;
7393
7394 if (eh->dyn_relocs == NULL)
7395 return TRUE;
7396
7397 /* In the shared -Bsymbolic case, discard space allocated for
7398 dynamic pc-relative relocs against symbols which turn out to be
7399 defined in regular objects. For the normal shared case, discard
7400 space for relocs that have become local due to symbol visibility
7401 changes. */
7402
7403 if (info->shared)
7404 {
7405 /* Relocs that use pc_count are those that appear on a call insn,
7406 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7407 generated via assembly. We want calls to protected symbols to
7408 resolve directly to the function rather than going via the plt.
7409 If people want function pointer comparisons to work as expected
7410 then they should avoid writing weird assembly. */
7411 if (SYMBOL_CALLS_LOCAL (info, h))
7412 {
7413 struct ppc_dyn_relocs **pp;
7414
7415 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7416 {
7417 p->count -= p->pc_count;
7418 p->pc_count = 0;
7419 if (p->count == 0)
7420 *pp = p->next;
7421 else
7422 pp = &p->next;
7423 }
7424 }
7425
7426 /* Also discard relocs on undefined weak syms with non-default
7427 visibility. */
7428 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7429 && h->root.type == bfd_link_hash_undefweak)
7430 eh->dyn_relocs = NULL;
7431 }
7432 else if (ELIMINATE_COPY_RELOCS)
7433 {
7434 /* For the non-shared case, discard space for relocs against
7435 symbols which turn out to need copy relocs or are not
7436 dynamic. */
7437
7438 if (!h->non_got_ref
7439 && h->def_dynamic
7440 && !h->def_regular)
7441 {
7442 /* Make sure this symbol is output as a dynamic symbol.
7443 Undefined weak syms won't yet be marked as dynamic. */
7444 if (h->dynindx == -1
7445 && !h->forced_local)
7446 {
7447 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7448 return FALSE;
7449 }
7450
7451 /* If that succeeded, we know we'll be keeping all the
7452 relocs. */
7453 if (h->dynindx != -1)
7454 goto keep;
7455 }
7456
7457 eh->dyn_relocs = NULL;
7458
7459 keep: ;
7460 }
7461
7462 /* Finally, allocate space. */
7463 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7464 {
7465 asection *sreloc = elf_section_data (p->sec)->sreloc;
7466 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7467 }
7468
7469 return TRUE;
7470 }
7471
7472 /* Find any dynamic relocs that apply to read-only sections. */
7473
7474 static bfd_boolean
7475 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7476 {
7477 struct ppc_link_hash_entry *eh;
7478 struct ppc_dyn_relocs *p;
7479
7480 if (h->root.type == bfd_link_hash_warning)
7481 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7482
7483 eh = (struct ppc_link_hash_entry *) h;
7484 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7485 {
7486 asection *s = p->sec->output_section;
7487
7488 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7489 {
7490 struct bfd_link_info *info = inf;
7491
7492 info->flags |= DF_TEXTREL;
7493
7494 /* Not an error, just cut short the traversal. */
7495 return FALSE;
7496 }
7497 }
7498 return TRUE;
7499 }
7500
7501 /* Set the sizes of the dynamic sections. */
7502
7503 static bfd_boolean
7504 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7505 struct bfd_link_info *info)
7506 {
7507 struct ppc_link_hash_table *htab;
7508 bfd *dynobj;
7509 asection *s;
7510 bfd_boolean relocs;
7511 bfd *ibfd;
7512
7513 htab = ppc_hash_table (info);
7514 dynobj = htab->elf.dynobj;
7515 if (dynobj == NULL)
7516 abort ();
7517
7518 if (htab->elf.dynamic_sections_created)
7519 {
7520 /* Set the contents of the .interp section to the interpreter. */
7521 if (info->executable)
7522 {
7523 s = bfd_get_section_by_name (dynobj, ".interp");
7524 if (s == NULL)
7525 abort ();
7526 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7527 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7528 }
7529 }
7530
7531 /* Set up .got offsets for local syms, and space for local dynamic
7532 relocs. */
7533 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7534 {
7535 struct got_entry **lgot_ents;
7536 struct got_entry **end_lgot_ents;
7537 char *lgot_masks;
7538 bfd_size_type locsymcount;
7539 Elf_Internal_Shdr *symtab_hdr;
7540 asection *srel;
7541
7542 if (!is_ppc64_elf_target (ibfd->xvec))
7543 continue;
7544
7545 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7546 {
7547 s = ppc64_elf_tdata (ibfd)->got;
7548 ppc64_tlsld_got (ibfd)->offset = s->size;
7549 s->size += 16;
7550 if (info->shared)
7551 {
7552 srel = ppc64_elf_tdata (ibfd)->relgot;
7553 srel->size += sizeof (Elf64_External_Rela);
7554 }
7555 }
7556 else
7557 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7558
7559 for (s = ibfd->sections; s != NULL; s = s->next)
7560 {
7561 struct ppc_dyn_relocs *p;
7562
7563 for (p = *((struct ppc_dyn_relocs **)
7564 &elf_section_data (s)->local_dynrel);
7565 p != NULL;
7566 p = p->next)
7567 {
7568 if (!bfd_is_abs_section (p->sec)
7569 && bfd_is_abs_section (p->sec->output_section))
7570 {
7571 /* Input section has been discarded, either because
7572 it is a copy of a linkonce section or due to
7573 linker script /DISCARD/, so we'll be discarding
7574 the relocs too. */
7575 }
7576 else if (p->count != 0)
7577 {
7578 srel = elf_section_data (p->sec)->sreloc;
7579 srel->size += p->count * sizeof (Elf64_External_Rela);
7580 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7581 info->flags |= DF_TEXTREL;
7582 }
7583 }
7584 }
7585
7586 lgot_ents = elf_local_got_ents (ibfd);
7587 if (!lgot_ents)
7588 continue;
7589
7590 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7591 locsymcount = symtab_hdr->sh_info;
7592 end_lgot_ents = lgot_ents + locsymcount;
7593 lgot_masks = (char *) end_lgot_ents;
7594 s = ppc64_elf_tdata (ibfd)->got;
7595 srel = ppc64_elf_tdata (ibfd)->relgot;
7596 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7597 {
7598 struct got_entry *ent;
7599
7600 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7601 if (ent->got.refcount > 0)
7602 {
7603 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7604 {
7605 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7606 {
7607 ppc64_tlsld_got (ibfd)->offset = s->size;
7608 s->size += 16;
7609 if (info->shared)
7610 srel->size += sizeof (Elf64_External_Rela);
7611 }
7612 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7613 }
7614 else
7615 {
7616 ent->got.offset = s->size;
7617 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7618 {
7619 s->size += 16;
7620 if (info->shared)
7621 srel->size += 2 * sizeof (Elf64_External_Rela);
7622 }
7623 else
7624 {
7625 s->size += 8;
7626 if (info->shared)
7627 srel->size += sizeof (Elf64_External_Rela);
7628 }
7629 }
7630 }
7631 else
7632 ent->got.offset = (bfd_vma) -1;
7633 }
7634 }
7635
7636 /* Allocate global sym .plt and .got entries, and space for global
7637 sym dynamic relocs. */
7638 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7639
7640 /* We now have determined the sizes of the various dynamic sections.
7641 Allocate memory for them. */
7642 relocs = FALSE;
7643 for (s = dynobj->sections; s != NULL; s = s->next)
7644 {
7645 if ((s->flags & SEC_LINKER_CREATED) == 0)
7646 continue;
7647
7648 if (s == htab->brlt || s == htab->relbrlt)
7649 /* These haven't been allocated yet; don't strip. */
7650 continue;
7651 else if (s == htab->got
7652 || s == htab->plt
7653 || s == htab->glink)
7654 {
7655 /* Strip this section if we don't need it; see the
7656 comment below. */
7657 }
7658 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7659 {
7660 if (s->size == 0)
7661 {
7662 /* If we don't need this section, strip it from the
7663 output file. This is mostly to handle .rela.bss and
7664 .rela.plt. We must create both sections in
7665 create_dynamic_sections, because they must be created
7666 before the linker maps input sections to output
7667 sections. The linker does that before
7668 adjust_dynamic_symbol is called, and it is that
7669 function which decides whether anything needs to go
7670 into these sections. */
7671 }
7672 else
7673 {
7674 if (s != htab->relplt)
7675 relocs = TRUE;
7676
7677 /* We use the reloc_count field as a counter if we need
7678 to copy relocs into the output file. */
7679 s->reloc_count = 0;
7680 }
7681 }
7682 else
7683 {
7684 /* It's not one of our sections, so don't allocate space. */
7685 continue;
7686 }
7687
7688 if (s->size == 0)
7689 {
7690 s->flags |= SEC_EXCLUDE;
7691 continue;
7692 }
7693
7694 /* .plt is in the bss section. We don't initialise it. */
7695 if (s == htab->plt)
7696 continue;
7697
7698 /* Allocate memory for the section contents. We use bfd_zalloc
7699 here in case unused entries are not reclaimed before the
7700 section's contents are written out. This should not happen,
7701 but this way if it does we get a R_PPC64_NONE reloc in .rela
7702 sections instead of garbage.
7703 We also rely on the section contents being zero when writing
7704 the GOT. */
7705 s->contents = bfd_zalloc (dynobj, s->size);
7706 if (s->contents == NULL)
7707 return FALSE;
7708 }
7709
7710 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7711 {
7712 if (!is_ppc64_elf_target (ibfd->xvec))
7713 continue;
7714
7715 s = ppc64_elf_tdata (ibfd)->got;
7716 if (s != NULL && s != htab->got)
7717 {
7718 if (s->size == 0)
7719 s->flags |= SEC_EXCLUDE;
7720 else
7721 {
7722 s->contents = bfd_zalloc (ibfd, s->size);
7723 if (s->contents == NULL)
7724 return FALSE;
7725 }
7726 }
7727 s = ppc64_elf_tdata (ibfd)->relgot;
7728 if (s != NULL)
7729 {
7730 if (s->size == 0)
7731 s->flags |= SEC_EXCLUDE;
7732 else
7733 {
7734 s->contents = bfd_zalloc (ibfd, s->size);
7735 if (s->contents == NULL)
7736 return FALSE;
7737 relocs = TRUE;
7738 s->reloc_count = 0;
7739 }
7740 }
7741 }
7742
7743 if (htab->elf.dynamic_sections_created)
7744 {
7745 /* Add some entries to the .dynamic section. We fill in the
7746 values later, in ppc64_elf_finish_dynamic_sections, but we
7747 must add the entries now so that we get the correct size for
7748 the .dynamic section. The DT_DEBUG entry is filled in by the
7749 dynamic linker and used by the debugger. */
7750 #define add_dynamic_entry(TAG, VAL) \
7751 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7752
7753 if (info->executable)
7754 {
7755 if (!add_dynamic_entry (DT_DEBUG, 0))
7756 return FALSE;
7757 }
7758
7759 if (htab->plt != NULL && htab->plt->size != 0)
7760 {
7761 if (!add_dynamic_entry (DT_PLTGOT, 0)
7762 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7763 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7764 || !add_dynamic_entry (DT_JMPREL, 0)
7765 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7766 return FALSE;
7767 }
7768
7769 if (NO_OPD_RELOCS)
7770 {
7771 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7772 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7773 return FALSE;
7774 }
7775
7776 if (relocs)
7777 {
7778 if (!add_dynamic_entry (DT_RELA, 0)
7779 || !add_dynamic_entry (DT_RELASZ, 0)
7780 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7781 return FALSE;
7782
7783 /* If any dynamic relocs apply to a read-only section,
7784 then we need a DT_TEXTREL entry. */
7785 if ((info->flags & DF_TEXTREL) == 0)
7786 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7787
7788 if ((info->flags & DF_TEXTREL) != 0)
7789 {
7790 if (!add_dynamic_entry (DT_TEXTREL, 0))
7791 return FALSE;
7792 }
7793 }
7794 }
7795 #undef add_dynamic_entry
7796
7797 return TRUE;
7798 }
7799
7800 /* Determine the type of stub needed, if any, for a call. */
7801
7802 static inline enum ppc_stub_type
7803 ppc_type_of_stub (asection *input_sec,
7804 const Elf_Internal_Rela *rel,
7805 struct ppc_link_hash_entry **hash,
7806 bfd_vma destination)
7807 {
7808 struct ppc_link_hash_entry *h = *hash;
7809 bfd_vma location;
7810 bfd_vma branch_offset;
7811 bfd_vma max_branch_offset;
7812 enum elf_ppc64_reloc_type r_type;
7813
7814 if (h != NULL)
7815 {
7816 if (h->oh != NULL
7817 && h->oh->is_func_descriptor)
7818 h = h->oh;
7819
7820 if (h->elf.dynindx != -1)
7821 {
7822 struct plt_entry *ent;
7823
7824 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7825 if (ent->addend == rel->r_addend
7826 && ent->plt.offset != (bfd_vma) -1)
7827 {
7828 *hash = h;
7829 return ppc_stub_plt_call;
7830 }
7831 }
7832
7833 if (!(h->elf.root.type == bfd_link_hash_defined
7834 || h->elf.root.type == bfd_link_hash_defweak)
7835 || h->elf.root.u.def.section->output_section == NULL)
7836 return ppc_stub_none;
7837 }
7838
7839 /* Determine where the call point is. */
7840 location = (input_sec->output_offset
7841 + input_sec->output_section->vma
7842 + rel->r_offset);
7843
7844 branch_offset = destination - location;
7845 r_type = ELF64_R_TYPE (rel->r_info);
7846
7847 /* Determine if a long branch stub is needed. */
7848 max_branch_offset = 1 << 25;
7849 if (r_type != R_PPC64_REL24)
7850 max_branch_offset = 1 << 15;
7851
7852 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7853 /* We need a stub. Figure out whether a long_branch or plt_branch
7854 is needed later. */
7855 return ppc_stub_long_branch;
7856
7857 return ppc_stub_none;
7858 }
7859
7860 /* Build a .plt call stub. */
7861
7862 static inline bfd_byte *
7863 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7864 {
7865 #define PPC_LO(v) ((v) & 0xffff)
7866 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7867 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7868
7869 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7870 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7871 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7872 if (PPC_HA (offset + 8) != PPC_HA (offset))
7873 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7874 offset += 8;
7875 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7876 if (PPC_HA (offset + 8) != PPC_HA (offset))
7877 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7878 offset += 8;
7879 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7880 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7881 bfd_put_32 (obfd, BCTR, p), p += 4;
7882 return p;
7883 }
7884
7885 static bfd_boolean
7886 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7887 {
7888 struct ppc_stub_hash_entry *stub_entry;
7889 struct ppc_branch_hash_entry *br_entry;
7890 struct bfd_link_info *info;
7891 struct ppc_link_hash_table *htab;
7892 bfd_byte *loc;
7893 bfd_byte *p;
7894 unsigned int indx;
7895 struct plt_entry *ent;
7896 bfd_vma dest, off;
7897 int size;
7898
7899 /* Massage our args to the form they really have. */
7900 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7901 info = in_arg;
7902
7903 htab = ppc_hash_table (info);
7904
7905 /* Make a note of the offset within the stubs for this entry. */
7906 stub_entry->stub_offset = stub_entry->stub_sec->size;
7907 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7908
7909 htab->stub_count[stub_entry->stub_type - 1] += 1;
7910 switch (stub_entry->stub_type)
7911 {
7912 case ppc_stub_long_branch:
7913 case ppc_stub_long_branch_r2off:
7914 /* Branches are relative. This is where we are going to. */
7915 off = dest = (stub_entry->target_value
7916 + stub_entry->target_section->output_offset
7917 + stub_entry->target_section->output_section->vma);
7918
7919 /* And this is where we are coming from. */
7920 off -= (stub_entry->stub_offset
7921 + stub_entry->stub_sec->output_offset
7922 + stub_entry->stub_sec->output_section->vma);
7923
7924 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7925 size = 4;
7926 else
7927 {
7928 bfd_vma r2off;
7929
7930 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7931 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7932 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7933 loc += 4;
7934 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7935 loc += 4;
7936 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7937 loc += 4;
7938 off -= 12;
7939 size = 16;
7940 }
7941 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7942
7943 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7944
7945 if (info->emitrelocations)
7946 {
7947 Elf_Internal_Rela *relocs, *r;
7948 struct bfd_elf_section_data *elfsec_data;
7949
7950 elfsec_data = elf_section_data (stub_entry->stub_sec);
7951 relocs = elfsec_data->relocs;
7952 if (relocs == NULL)
7953 {
7954 bfd_size_type relsize;
7955 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7956 relocs = bfd_alloc (htab->stub_bfd, relsize);
7957 if (relocs == NULL)
7958 return FALSE;
7959 elfsec_data->relocs = relocs;
7960 elfsec_data->rel_hdr.sh_size = relsize;
7961 elfsec_data->rel_hdr.sh_entsize = 24;
7962 stub_entry->stub_sec->reloc_count = 0;
7963 }
7964 r = relocs + stub_entry->stub_sec->reloc_count;
7965 stub_entry->stub_sec->reloc_count += 1;
7966 r->r_offset = loc - stub_entry->stub_sec->contents;
7967 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7968 r->r_addend = dest;
7969 if (stub_entry->h != NULL)
7970 {
7971 struct elf_link_hash_entry **hashes;
7972 unsigned long symndx;
7973 struct ppc_link_hash_entry *h;
7974
7975 hashes = elf_sym_hashes (htab->stub_bfd);
7976 if (hashes == NULL)
7977 {
7978 bfd_size_type hsize;
7979
7980 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7981 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7982 if (hashes == NULL)
7983 return FALSE;
7984 elf_sym_hashes (htab->stub_bfd) = hashes;
7985 htab->stub_globals = 1;
7986 }
7987 symndx = htab->stub_globals++;
7988 h = stub_entry->h;
7989 hashes[symndx] = &h->elf;
7990 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7991 if (h->oh != NULL && h->oh->is_func)
7992 h = h->oh;
7993 if (h->elf.root.u.def.section != stub_entry->target_section)
7994 /* H is an opd symbol. The addend must be zero. */
7995 r->r_addend = 0;
7996 else
7997 {
7998 off = (h->elf.root.u.def.value
7999 + h->elf.root.u.def.section->output_offset
8000 + h->elf.root.u.def.section->output_section->vma);
8001 r->r_addend -= off;
8002 }
8003 }
8004 }
8005 break;
8006
8007 case ppc_stub_plt_branch:
8008 case ppc_stub_plt_branch_r2off:
8009 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8010 stub_entry->root.string + 9,
8011 FALSE, FALSE);
8012 if (br_entry == NULL)
8013 {
8014 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8015 stub_entry->root.string + 9);
8016 htab->stub_error = TRUE;
8017 return FALSE;
8018 }
8019
8020 off = (stub_entry->target_value
8021 + stub_entry->target_section->output_offset
8022 + stub_entry->target_section->output_section->vma);
8023
8024 bfd_put_64 (htab->brlt->owner, off,
8025 htab->brlt->contents + br_entry->offset);
8026
8027 if (htab->relbrlt != NULL)
8028 {
8029 /* Create a reloc for the branch lookup table entry. */
8030 Elf_Internal_Rela rela;
8031 bfd_byte *rl;
8032
8033 rela.r_offset = (br_entry->offset
8034 + htab->brlt->output_offset
8035 + htab->brlt->output_section->vma);
8036 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8037 rela.r_addend = off;
8038
8039 rl = htab->relbrlt->contents;
8040 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8041 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8042 }
8043
8044 off = (br_entry->offset
8045 + htab->brlt->output_offset
8046 + htab->brlt->output_section->vma
8047 - elf_gp (htab->brlt->output_section->owner)
8048 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8049
8050 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8051 {
8052 (*_bfd_error_handler)
8053 (_("linkage table error against `%s'"),
8054 stub_entry->root.string);
8055 bfd_set_error (bfd_error_bad_value);
8056 htab->stub_error = TRUE;
8057 return FALSE;
8058 }
8059
8060 indx = off;
8061 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8062 {
8063 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8064 loc += 4;
8065 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8066 size = 16;
8067 }
8068 else
8069 {
8070 bfd_vma r2off;
8071
8072 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8073 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8074 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8075 loc += 4;
8076 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8077 loc += 4;
8078 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8079 loc += 4;
8080 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8081 loc += 4;
8082 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8083 size = 28;
8084 }
8085 loc += 4;
8086 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8087 loc += 4;
8088 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8089 break;
8090
8091 case ppc_stub_plt_call:
8092 /* Do the best we can for shared libraries built without
8093 exporting ".foo" for each "foo". This can happen when symbol
8094 versioning scripts strip all bar a subset of symbols. */
8095 if (stub_entry->h->oh != NULL
8096 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8097 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8098 {
8099 /* Point the symbol at the stub. There may be multiple stubs,
8100 we don't really care; The main thing is to make this sym
8101 defined somewhere. Maybe defining the symbol in the stub
8102 section is a silly idea. If we didn't do this, htab->top_id
8103 could disappear. */
8104 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8105 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8106 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8107 }
8108
8109 /* Now build the stub. */
8110 off = (bfd_vma) -1;
8111 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8112 if (ent->addend == stub_entry->addend)
8113 {
8114 off = ent->plt.offset;
8115 break;
8116 }
8117 if (off >= (bfd_vma) -2)
8118 abort ();
8119
8120 off &= ~ (bfd_vma) 1;
8121 off += (htab->plt->output_offset
8122 + htab->plt->output_section->vma
8123 - elf_gp (htab->plt->output_section->owner)
8124 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8125
8126 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8127 {
8128 (*_bfd_error_handler)
8129 (_("linkage table error against `%s'"),
8130 stub_entry->h->elf.root.root.string);
8131 bfd_set_error (bfd_error_bad_value);
8132 htab->stub_error = TRUE;
8133 return FALSE;
8134 }
8135
8136 p = build_plt_stub (htab->stub_bfd, loc, off);
8137 size = p - loc;
8138 break;
8139
8140 default:
8141 BFD_FAIL ();
8142 return FALSE;
8143 }
8144
8145 stub_entry->stub_sec->size += size;
8146
8147 if (htab->emit_stub_syms)
8148 {
8149 struct elf_link_hash_entry *h;
8150 size_t len1, len2;
8151 char *name;
8152 const char *const stub_str[] = { "long_branch",
8153 "long_branch_r2off",
8154 "plt_branch",
8155 "plt_branch_r2off",
8156 "plt_call" };
8157
8158 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8159 len2 = strlen (stub_entry->root.string);
8160 name = bfd_malloc (len1 + len2 + 2);
8161 if (name == NULL)
8162 return FALSE;
8163 memcpy (name, stub_entry->root.string, 9);
8164 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8165 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8166 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8167 if (h == NULL)
8168 return FALSE;
8169 if (h->root.type == bfd_link_hash_new)
8170 {
8171 h->root.type = bfd_link_hash_defined;
8172 h->root.u.def.section = stub_entry->stub_sec;
8173 h->root.u.def.value = stub_entry->stub_offset;
8174 h->ref_regular = 1;
8175 h->def_regular = 1;
8176 h->ref_regular_nonweak = 1;
8177 h->forced_local = 1;
8178 h->non_elf = 0;
8179 }
8180 }
8181
8182 return TRUE;
8183 }
8184
8185 /* As above, but don't actually build the stub. Just bump offset so
8186 we know stub section sizes, and select plt_branch stubs where
8187 long_branch stubs won't do. */
8188
8189 static bfd_boolean
8190 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8191 {
8192 struct ppc_stub_hash_entry *stub_entry;
8193 struct bfd_link_info *info;
8194 struct ppc_link_hash_table *htab;
8195 bfd_vma off;
8196 int size;
8197
8198 /* Massage our args to the form they really have. */
8199 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8200 info = in_arg;
8201
8202 htab = ppc_hash_table (info);
8203
8204 if (stub_entry->stub_type == ppc_stub_plt_call)
8205 {
8206 struct plt_entry *ent;
8207 off = (bfd_vma) -1;
8208 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8209 if (ent->addend == stub_entry->addend)
8210 {
8211 off = ent->plt.offset & ~(bfd_vma) 1;
8212 break;
8213 }
8214 if (off >= (bfd_vma) -2)
8215 abort ();
8216 off += (htab->plt->output_offset
8217 + htab->plt->output_section->vma
8218 - elf_gp (htab->plt->output_section->owner)
8219 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8220
8221 size = PLT_CALL_STUB_SIZE;
8222 if (PPC_HA (off + 16) != PPC_HA (off))
8223 size += 4;
8224 }
8225 else
8226 {
8227 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8228 variants. */
8229 off = (stub_entry->target_value
8230 + stub_entry->target_section->output_offset
8231 + stub_entry->target_section->output_section->vma);
8232 off -= (stub_entry->stub_sec->size
8233 + stub_entry->stub_sec->output_offset
8234 + stub_entry->stub_sec->output_section->vma);
8235
8236 /* Reset the stub type from the plt variant in case we now
8237 can reach with a shorter stub. */
8238 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8239 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8240
8241 size = 4;
8242 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8243 {
8244 off -= 12;
8245 size = 16;
8246 }
8247
8248 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8249 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8250 {
8251 struct ppc_branch_hash_entry *br_entry;
8252
8253 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8254 stub_entry->root.string + 9,
8255 TRUE, FALSE);
8256 if (br_entry == NULL)
8257 {
8258 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8259 stub_entry->root.string + 9);
8260 htab->stub_error = TRUE;
8261 return FALSE;
8262 }
8263
8264 if (br_entry->iter != htab->stub_iteration)
8265 {
8266 br_entry->iter = htab->stub_iteration;
8267 br_entry->offset = htab->brlt->size;
8268 htab->brlt->size += 8;
8269
8270 if (htab->relbrlt != NULL)
8271 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8272 }
8273
8274 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8275 size = 16;
8276 if (stub_entry->stub_type != ppc_stub_plt_branch)
8277 size = 28;
8278 }
8279
8280 if (info->emitrelocations
8281 && (stub_entry->stub_type == ppc_stub_long_branch
8282 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8283 stub_entry->stub_sec->reloc_count += 1;
8284 }
8285
8286 stub_entry->stub_sec->size += size;
8287 return TRUE;
8288 }
8289
8290 /* Set up various things so that we can make a list of input sections
8291 for each output section included in the link. Returns -1 on error,
8292 0 when no stubs will be needed, and 1 on success. */
8293
8294 int
8295 ppc64_elf_setup_section_lists (bfd *output_bfd,
8296 struct bfd_link_info *info,
8297 int no_multi_toc)
8298 {
8299 bfd *input_bfd;
8300 int top_id, top_index, id;
8301 asection *section;
8302 asection **input_list;
8303 bfd_size_type amt;
8304 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8305
8306 htab->no_multi_toc = no_multi_toc;
8307
8308 if (htab->brlt == NULL)
8309 return 0;
8310
8311 /* Find the top input section id. */
8312 for (input_bfd = info->input_bfds, top_id = 3;
8313 input_bfd != NULL;
8314 input_bfd = input_bfd->link_next)
8315 {
8316 for (section = input_bfd->sections;
8317 section != NULL;
8318 section = section->next)
8319 {
8320 if (top_id < section->id)
8321 top_id = section->id;
8322 }
8323 }
8324
8325 htab->top_id = top_id;
8326 amt = sizeof (struct map_stub) * (top_id + 1);
8327 htab->stub_group = bfd_zmalloc (amt);
8328 if (htab->stub_group == NULL)
8329 return -1;
8330
8331 /* Set toc_off for com, und, abs and ind sections. */
8332 for (id = 0; id < 3; id++)
8333 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8334
8335 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8336
8337 /* We can't use output_bfd->section_count here to find the top output
8338 section index as some sections may have been removed, and
8339 strip_excluded_output_sections doesn't renumber the indices. */
8340 for (section = output_bfd->sections, top_index = 0;
8341 section != NULL;
8342 section = section->next)
8343 {
8344 if (top_index < section->index)
8345 top_index = section->index;
8346 }
8347
8348 htab->top_index = top_index;
8349 amt = sizeof (asection *) * (top_index + 1);
8350 input_list = bfd_zmalloc (amt);
8351 htab->input_list = input_list;
8352 if (input_list == NULL)
8353 return -1;
8354
8355 return 1;
8356 }
8357
8358 /* The linker repeatedly calls this function for each TOC input section
8359 and linker generated GOT section. Group input bfds such that the toc
8360 within a group is less than 64k in size. Will break with cute linker
8361 scripts that play games with dot in the output toc section. */
8362
8363 void
8364 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8365 {
8366 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8367
8368 if (!htab->no_multi_toc)
8369 {
8370 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8371 bfd_vma off = addr - htab->toc_curr;
8372
8373 if (off + isec->size > 0x10000)
8374 htab->toc_curr = addr;
8375
8376 elf_gp (isec->owner) = (htab->toc_curr
8377 - elf_gp (isec->output_section->owner)
8378 + TOC_BASE_OFF);
8379 }
8380 }
8381
8382 /* Called after the last call to the above function. */
8383
8384 void
8385 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8386 {
8387 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8388
8389 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8390
8391 /* toc_curr tracks the TOC offset used for code sections below in
8392 ppc64_elf_next_input_section. Start off at 0x8000. */
8393 htab->toc_curr = TOC_BASE_OFF;
8394 }
8395
8396 /* No toc references were found in ISEC. If the code in ISEC makes no
8397 calls, then there's no need to use toc adjusting stubs when branching
8398 into ISEC. Actually, indirect calls from ISEC are OK as they will
8399 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8400 needed, and 2 if a cyclical call-graph was found but no other reason
8401 for a stub was detected. If called from the top level, a return of
8402 2 means the same as a return of 0. */
8403
8404 static int
8405 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8406 {
8407 Elf_Internal_Rela *relstart, *rel;
8408 Elf_Internal_Sym *local_syms;
8409 int ret;
8410 struct ppc_link_hash_table *htab;
8411
8412 /* We know none of our code bearing sections will need toc stubs. */
8413 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8414 return 0;
8415
8416 if (isec->size == 0)
8417 return 0;
8418
8419 if (isec->output_section == NULL)
8420 return 0;
8421
8422 /* Hack for linux kernel. .fixup contains branches, but only back to
8423 the function that hit an exception. */
8424 if (strcmp (isec->name, ".fixup") == 0)
8425 return 0;
8426
8427 if (isec->reloc_count == 0)
8428 return 0;
8429
8430 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8431 info->keep_memory);
8432 if (relstart == NULL)
8433 return -1;
8434
8435 /* Look for branches to outside of this section. */
8436 local_syms = NULL;
8437 ret = 0;
8438 htab = ppc_hash_table (info);
8439 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8440 {
8441 enum elf_ppc64_reloc_type r_type;
8442 unsigned long r_symndx;
8443 struct elf_link_hash_entry *h;
8444 Elf_Internal_Sym *sym;
8445 asection *sym_sec;
8446 long *opd_adjust;
8447 bfd_vma sym_value;
8448 bfd_vma dest;
8449
8450 r_type = ELF64_R_TYPE (rel->r_info);
8451 if (r_type != R_PPC64_REL24
8452 && r_type != R_PPC64_REL14
8453 && r_type != R_PPC64_REL14_BRTAKEN
8454 && r_type != R_PPC64_REL14_BRNTAKEN)
8455 continue;
8456
8457 r_symndx = ELF64_R_SYM (rel->r_info);
8458 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8459 isec->owner))
8460 {
8461 ret = -1;
8462 break;
8463 }
8464
8465 /* Calls to dynamic lib functions go through a plt call stub
8466 that uses r2. Branches to undefined symbols might be a call
8467 using old-style dot symbols that can be satisfied by a plt
8468 call into a new-style dynamic library. */
8469 if (sym_sec == NULL)
8470 {
8471 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8472 if (eh != NULL
8473 && eh->oh != NULL
8474 && eh->oh->elf.plt.plist != NULL)
8475 {
8476 ret = 1;
8477 break;
8478 }
8479
8480 /* Ignore other undefined symbols. */
8481 continue;
8482 }
8483
8484 /* Assume branches to other sections not included in the link need
8485 stubs too, to cover -R and absolute syms. */
8486 if (sym_sec->output_section == NULL)
8487 {
8488 ret = 1;
8489 break;
8490 }
8491
8492 if (h == NULL)
8493 sym_value = sym->st_value;
8494 else
8495 {
8496 if (h->root.type != bfd_link_hash_defined
8497 && h->root.type != bfd_link_hash_defweak)
8498 abort ();
8499 sym_value = h->root.u.def.value;
8500 }
8501 sym_value += rel->r_addend;
8502
8503 /* If this branch reloc uses an opd sym, find the code section. */
8504 opd_adjust = get_opd_info (sym_sec);
8505 if (opd_adjust != NULL)
8506 {
8507 if (h == NULL)
8508 {
8509 long adjust;
8510
8511 adjust = opd_adjust[sym->st_value / 8];
8512 if (adjust == -1)
8513 /* Assume deleted functions won't ever be called. */
8514 continue;
8515 sym_value += adjust;
8516 }
8517
8518 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8519 if (dest == (bfd_vma) -1)
8520 continue;
8521 }
8522 else
8523 dest = (sym_value
8524 + sym_sec->output_offset
8525 + sym_sec->output_section->vma);
8526
8527 /* Ignore branch to self. */
8528 if (sym_sec == isec)
8529 continue;
8530
8531 /* If the called function uses the toc, we need a stub. */
8532 if (sym_sec->has_toc_reloc
8533 || sym_sec->makes_toc_func_call)
8534 {
8535 ret = 1;
8536 break;
8537 }
8538
8539 /* Assume any branch that needs a long branch stub might in fact
8540 need a plt_branch stub. A plt_branch stub uses r2. */
8541 else if (dest - (isec->output_offset
8542 + isec->output_section->vma
8543 + rel->r_offset) + (1 << 25) >= (2 << 25))
8544 {
8545 ret = 1;
8546 break;
8547 }
8548
8549 /* If calling back to a section in the process of being tested, we
8550 can't say for sure that no toc adjusting stubs are needed, so
8551 don't return zero. */
8552 else if (sym_sec->call_check_in_progress)
8553 ret = 2;
8554
8555 /* Branches to another section that itself doesn't have any TOC
8556 references are OK. Recursively call ourselves to check. */
8557 else if (sym_sec->id <= htab->top_id
8558 && htab->stub_group[sym_sec->id].toc_off == 0)
8559 {
8560 int recur;
8561
8562 /* Mark current section as indeterminate, so that other
8563 sections that call back to current won't be marked as
8564 known. */
8565 isec->call_check_in_progress = 1;
8566 recur = toc_adjusting_stub_needed (info, sym_sec);
8567 isec->call_check_in_progress = 0;
8568
8569 if (recur < 0)
8570 {
8571 /* An error. Exit. */
8572 ret = -1;
8573 break;
8574 }
8575 else if (recur <= 1)
8576 {
8577 /* Known result. Mark as checked and set section flag. */
8578 htab->stub_group[sym_sec->id].toc_off = 1;
8579 if (recur != 0)
8580 {
8581 sym_sec->makes_toc_func_call = 1;
8582 ret = 1;
8583 break;
8584 }
8585 }
8586 else
8587 {
8588 /* Unknown result. Continue checking. */
8589 ret = 2;
8590 }
8591 }
8592 }
8593
8594 if (local_syms != NULL
8595 && (elf_tdata (isec->owner)->symtab_hdr.contents
8596 != (unsigned char *) local_syms))
8597 free (local_syms);
8598 if (elf_section_data (isec)->relocs != relstart)
8599 free (relstart);
8600
8601 return ret;
8602 }
8603
8604 /* The linker repeatedly calls this function for each input section,
8605 in the order that input sections are linked into output sections.
8606 Build lists of input sections to determine groupings between which
8607 we may insert linker stubs. */
8608
8609 bfd_boolean
8610 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8611 {
8612 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8613
8614 if ((isec->output_section->flags & SEC_CODE) != 0
8615 && isec->output_section->index <= htab->top_index)
8616 {
8617 asection **list = htab->input_list + isec->output_section->index;
8618 /* Steal the link_sec pointer for our list. */
8619 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8620 /* This happens to make the list in reverse order,
8621 which is what we want. */
8622 PREV_SEC (isec) = *list;
8623 *list = isec;
8624 }
8625
8626 if (htab->multi_toc_needed)
8627 {
8628 /* If a code section has a function that uses the TOC then we need
8629 to use the right TOC (obviously). Also, make sure that .opd gets
8630 the correct TOC value for R_PPC64_TOC relocs that don't have or
8631 can't find their function symbol (shouldn't ever happen now). */
8632 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8633 {
8634 if (elf_gp (isec->owner) != 0)
8635 htab->toc_curr = elf_gp (isec->owner);
8636 }
8637 else if (htab->stub_group[isec->id].toc_off == 0)
8638 {
8639 int ret = toc_adjusting_stub_needed (info, isec);
8640 if (ret < 0)
8641 return FALSE;
8642 else
8643 isec->makes_toc_func_call = ret & 1;
8644 }
8645 }
8646
8647 /* Functions that don't use the TOC can belong in any TOC group.
8648 Use the last TOC base. This happens to make _init and _fini
8649 pasting work. */
8650 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8651 return TRUE;
8652 }
8653
8654 /* See whether we can group stub sections together. Grouping stub
8655 sections may result in fewer stubs. More importantly, we need to
8656 put all .init* and .fini* stubs at the beginning of the .init or
8657 .fini output sections respectively, because glibc splits the
8658 _init and _fini functions into multiple parts. Putting a stub in
8659 the middle of a function is not a good idea. */
8660
8661 static void
8662 group_sections (struct ppc_link_hash_table *htab,
8663 bfd_size_type stub_group_size,
8664 bfd_boolean stubs_always_before_branch)
8665 {
8666 asection **list = htab->input_list + htab->top_index;
8667 do
8668 {
8669 asection *tail = *list;
8670 while (tail != NULL)
8671 {
8672 asection *curr;
8673 asection *prev;
8674 bfd_size_type total;
8675 bfd_boolean big_sec;
8676 bfd_vma curr_toc;
8677
8678 curr = tail;
8679 total = tail->size;
8680 big_sec = total >= stub_group_size;
8681 curr_toc = htab->stub_group[tail->id].toc_off;
8682
8683 while ((prev = PREV_SEC (curr)) != NULL
8684 && ((total += curr->output_offset - prev->output_offset)
8685 < stub_group_size)
8686 && htab->stub_group[prev->id].toc_off == curr_toc)
8687 curr = prev;
8688
8689 /* OK, the size from the start of CURR to the end is less
8690 than stub_group_size and thus can be handled by one stub
8691 section. (or the tail section is itself larger than
8692 stub_group_size, in which case we may be toast.) We
8693 should really be keeping track of the total size of stubs
8694 added here, as stubs contribute to the final output
8695 section size. That's a little tricky, and this way will
8696 only break if stubs added make the total size more than
8697 2^25, ie. for the default stub_group_size, if stubs total
8698 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8699 do
8700 {
8701 prev = PREV_SEC (tail);
8702 /* Set up this stub group. */
8703 htab->stub_group[tail->id].link_sec = curr;
8704 }
8705 while (tail != curr && (tail = prev) != NULL);
8706
8707 /* But wait, there's more! Input sections up to stub_group_size
8708 bytes before the stub section can be handled by it too.
8709 Don't do this if we have a really large section after the
8710 stubs, as adding more stubs increases the chance that
8711 branches may not reach into the stub section. */
8712 if (!stubs_always_before_branch && !big_sec)
8713 {
8714 total = 0;
8715 while (prev != NULL
8716 && ((total += tail->output_offset - prev->output_offset)
8717 < stub_group_size)
8718 && htab->stub_group[prev->id].toc_off == curr_toc)
8719 {
8720 tail = prev;
8721 prev = PREV_SEC (tail);
8722 htab->stub_group[tail->id].link_sec = curr;
8723 }
8724 }
8725 tail = prev;
8726 }
8727 }
8728 while (list-- != htab->input_list);
8729 free (htab->input_list);
8730 #undef PREV_SEC
8731 }
8732
8733 /* Determine and set the size of the stub section for a final link.
8734
8735 The basic idea here is to examine all the relocations looking for
8736 PC-relative calls to a target that is unreachable with a "bl"
8737 instruction. */
8738
8739 bfd_boolean
8740 ppc64_elf_size_stubs (bfd *output_bfd,
8741 struct bfd_link_info *info,
8742 bfd_signed_vma group_size,
8743 asection *(*add_stub_section) (const char *, asection *),
8744 void (*layout_sections_again) (void))
8745 {
8746 bfd_size_type stub_group_size;
8747 bfd_boolean stubs_always_before_branch;
8748 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8749
8750 /* Stash our params away. */
8751 htab->add_stub_section = add_stub_section;
8752 htab->layout_sections_again = layout_sections_again;
8753 stubs_always_before_branch = group_size < 0;
8754 if (group_size < 0)
8755 stub_group_size = -group_size;
8756 else
8757 stub_group_size = group_size;
8758 if (stub_group_size == 1)
8759 {
8760 /* Default values. */
8761 if (stubs_always_before_branch)
8762 {
8763 stub_group_size = 0x1e00000;
8764 if (htab->has_14bit_branch)
8765 stub_group_size = 0x7800;
8766 }
8767 else
8768 {
8769 stub_group_size = 0x1c00000;
8770 if (htab->has_14bit_branch)
8771 stub_group_size = 0x7000;
8772 }
8773 }
8774
8775 group_sections (htab, stub_group_size, stubs_always_before_branch);
8776
8777 while (1)
8778 {
8779 bfd *input_bfd;
8780 unsigned int bfd_indx;
8781 asection *stub_sec;
8782 bfd_boolean stub_changed;
8783
8784 htab->stub_iteration += 1;
8785 stub_changed = FALSE;
8786
8787 for (input_bfd = info->input_bfds, bfd_indx = 0;
8788 input_bfd != NULL;
8789 input_bfd = input_bfd->link_next, bfd_indx++)
8790 {
8791 Elf_Internal_Shdr *symtab_hdr;
8792 asection *section;
8793 Elf_Internal_Sym *local_syms = NULL;
8794
8795 /* We'll need the symbol table in a second. */
8796 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8797 if (symtab_hdr->sh_info == 0)
8798 continue;
8799
8800 /* Walk over each section attached to the input bfd. */
8801 for (section = input_bfd->sections;
8802 section != NULL;
8803 section = section->next)
8804 {
8805 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8806
8807 /* If there aren't any relocs, then there's nothing more
8808 to do. */
8809 if ((section->flags & SEC_RELOC) == 0
8810 || section->reloc_count == 0)
8811 continue;
8812
8813 /* If this section is a link-once section that will be
8814 discarded, then don't create any stubs. */
8815 if (section->output_section == NULL
8816 || section->output_section->owner != output_bfd)
8817 continue;
8818
8819 /* Get the relocs. */
8820 internal_relocs
8821 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8822 info->keep_memory);
8823 if (internal_relocs == NULL)
8824 goto error_ret_free_local;
8825
8826 /* Now examine each relocation. */
8827 irela = internal_relocs;
8828 irelaend = irela + section->reloc_count;
8829 for (; irela < irelaend; irela++)
8830 {
8831 enum elf_ppc64_reloc_type r_type;
8832 unsigned int r_indx;
8833 enum ppc_stub_type stub_type;
8834 struct ppc_stub_hash_entry *stub_entry;
8835 asection *sym_sec, *code_sec;
8836 bfd_vma sym_value;
8837 bfd_vma destination;
8838 bfd_boolean ok_dest;
8839 struct ppc_link_hash_entry *hash;
8840 struct ppc_link_hash_entry *fdh;
8841 struct elf_link_hash_entry *h;
8842 Elf_Internal_Sym *sym;
8843 char *stub_name;
8844 const asection *id_sec;
8845 long *opd_adjust;
8846
8847 r_type = ELF64_R_TYPE (irela->r_info);
8848 r_indx = ELF64_R_SYM (irela->r_info);
8849
8850 if (r_type >= R_PPC64_max)
8851 {
8852 bfd_set_error (bfd_error_bad_value);
8853 goto error_ret_free_internal;
8854 }
8855
8856 /* Only look for stubs on branch instructions. */
8857 if (r_type != R_PPC64_REL24
8858 && r_type != R_PPC64_REL14
8859 && r_type != R_PPC64_REL14_BRTAKEN
8860 && r_type != R_PPC64_REL14_BRNTAKEN)
8861 continue;
8862
8863 /* Now determine the call target, its name, value,
8864 section. */
8865 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8866 r_indx, input_bfd))
8867 goto error_ret_free_internal;
8868 hash = (struct ppc_link_hash_entry *) h;
8869
8870 ok_dest = FALSE;
8871 fdh = NULL;
8872 if (hash == NULL)
8873 {
8874 sym_value = sym->st_value;
8875 ok_dest = TRUE;
8876 }
8877 else
8878 {
8879 sym_value = 0;
8880 /* Recognise an old ABI func code entry sym, and
8881 use the func descriptor sym instead. */
8882 if (hash->elf.root.root.string[0] == '.'
8883 && (fdh = get_fdh (hash, htab)) != NULL)
8884 {
8885 if (fdh->elf.root.type == bfd_link_hash_defined
8886 || fdh->elf.root.type == bfd_link_hash_defweak)
8887 {
8888 sym_sec = fdh->elf.root.u.def.section;
8889 sym_value = fdh->elf.root.u.def.value;
8890 if (sym_sec->output_section != NULL)
8891 ok_dest = TRUE;
8892 }
8893 else
8894 fdh = NULL;
8895 }
8896 else if (hash->elf.root.type == bfd_link_hash_defined
8897 || hash->elf.root.type == bfd_link_hash_defweak)
8898 {
8899 sym_value = hash->elf.root.u.def.value;
8900 if (sym_sec->output_section != NULL)
8901 ok_dest = TRUE;
8902 }
8903 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8904 ;
8905 else if (hash->elf.root.type == bfd_link_hash_undefined)
8906 ;
8907 else
8908 {
8909 bfd_set_error (bfd_error_bad_value);
8910 goto error_ret_free_internal;
8911 }
8912 }
8913
8914 destination = 0;
8915 if (ok_dest)
8916 {
8917 sym_value += irela->r_addend;
8918 destination = (sym_value
8919 + sym_sec->output_offset
8920 + sym_sec->output_section->vma);
8921 }
8922
8923 code_sec = sym_sec;
8924 opd_adjust = get_opd_info (sym_sec);
8925 if (opd_adjust != NULL)
8926 {
8927 bfd_vma dest;
8928
8929 if (hash == NULL)
8930 {
8931 long adjust = opd_adjust[sym_value / 8];
8932 if (adjust == -1)
8933 continue;
8934 sym_value += adjust;
8935 }
8936 dest = opd_entry_value (sym_sec, sym_value,
8937 &code_sec, &sym_value);
8938 if (dest != (bfd_vma) -1)
8939 {
8940 destination = dest;
8941 if (fdh != NULL)
8942 {
8943 /* Fixup old ABI sym to point at code
8944 entry. */
8945 hash->elf.root.type = bfd_link_hash_defweak;
8946 hash->elf.root.u.def.section = code_sec;
8947 hash->elf.root.u.def.value = sym_value;
8948 }
8949 }
8950 }
8951
8952 /* Determine what (if any) linker stub is needed. */
8953 stub_type = ppc_type_of_stub (section, irela, &hash,
8954 destination);
8955
8956 if (stub_type != ppc_stub_plt_call)
8957 {
8958 /* Check whether we need a TOC adjusting stub.
8959 Since the linker pastes together pieces from
8960 different object files when creating the
8961 _init and _fini functions, it may be that a
8962 call to what looks like a local sym is in
8963 fact a call needing a TOC adjustment. */
8964 if (code_sec != NULL
8965 && code_sec->output_section != NULL
8966 && (htab->stub_group[code_sec->id].toc_off
8967 != htab->stub_group[section->id].toc_off)
8968 && (code_sec->has_toc_reloc
8969 || code_sec->makes_toc_func_call))
8970 stub_type = ppc_stub_long_branch_r2off;
8971 }
8972
8973 if (stub_type == ppc_stub_none)
8974 continue;
8975
8976 /* __tls_get_addr calls might be eliminated. */
8977 if (stub_type != ppc_stub_plt_call
8978 && hash != NULL
8979 && (hash == htab->tls_get_addr
8980 || hash == htab->tls_get_addr_fd)
8981 && section->has_tls_reloc
8982 && irela != internal_relocs)
8983 {
8984 /* Get tls info. */
8985 char *tls_mask;
8986
8987 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8988 irela - 1, input_bfd))
8989 goto error_ret_free_internal;
8990 if (*tls_mask != 0)
8991 continue;
8992 }
8993
8994 /* Support for grouping stub sections. */
8995 id_sec = htab->stub_group[section->id].link_sec;
8996
8997 /* Get the name of this stub. */
8998 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8999 if (!stub_name)
9000 goto error_ret_free_internal;
9001
9002 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9003 stub_name, FALSE, FALSE);
9004 if (stub_entry != NULL)
9005 {
9006 /* The proper stub has already been created. */
9007 free (stub_name);
9008 continue;
9009 }
9010
9011 stub_entry = ppc_add_stub (stub_name, section, htab);
9012 if (stub_entry == NULL)
9013 {
9014 free (stub_name);
9015 error_ret_free_internal:
9016 if (elf_section_data (section)->relocs == NULL)
9017 free (internal_relocs);
9018 error_ret_free_local:
9019 if (local_syms != NULL
9020 && (symtab_hdr->contents
9021 != (unsigned char *) local_syms))
9022 free (local_syms);
9023 return FALSE;
9024 }
9025
9026 stub_entry->stub_type = stub_type;
9027 stub_entry->target_value = sym_value;
9028 stub_entry->target_section = code_sec;
9029 stub_entry->h = hash;
9030 stub_entry->addend = irela->r_addend;
9031
9032 if (stub_entry->h != NULL)
9033 htab->stub_globals += 1;
9034
9035 stub_changed = TRUE;
9036 }
9037
9038 /* We're done with the internal relocs, free them. */
9039 if (elf_section_data (section)->relocs != internal_relocs)
9040 free (internal_relocs);
9041 }
9042
9043 if (local_syms != NULL
9044 && symtab_hdr->contents != (unsigned char *) local_syms)
9045 {
9046 if (!info->keep_memory)
9047 free (local_syms);
9048 else
9049 symtab_hdr->contents = (unsigned char *) local_syms;
9050 }
9051 }
9052
9053 if (!stub_changed)
9054 break;
9055
9056 /* OK, we've added some stubs. Find out the new size of the
9057 stub sections. */
9058 for (stub_sec = htab->stub_bfd->sections;
9059 stub_sec != NULL;
9060 stub_sec = stub_sec->next)
9061 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9062 {
9063 stub_sec->size = 0;
9064 stub_sec->reloc_count = 0;
9065 }
9066
9067 htab->brlt->size = 0;
9068 if (htab->relbrlt != NULL)
9069 htab->relbrlt->size = 0;
9070
9071 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9072
9073 /* Ask the linker to do its stuff. */
9074 (*htab->layout_sections_again) ();
9075 }
9076
9077 /* It would be nice to strip .branch_lt from the output if the
9078 section is empty, but it's too late. If we strip sections here,
9079 the dynamic symbol table is corrupted since the section symbol
9080 for the stripped section isn't written. */
9081
9082 return TRUE;
9083 }
9084
9085 /* Called after we have determined section placement. If sections
9086 move, we'll be called again. Provide a value for TOCstart. */
9087
9088 bfd_vma
9089 ppc64_elf_toc (bfd *obfd)
9090 {
9091 asection *s;
9092 bfd_vma TOCstart;
9093
9094 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9095 order. The TOC starts where the first of these sections starts. */
9096 s = bfd_get_section_by_name (obfd, ".got");
9097 if (s == NULL)
9098 s = bfd_get_section_by_name (obfd, ".toc");
9099 if (s == NULL)
9100 s = bfd_get_section_by_name (obfd, ".tocbss");
9101 if (s == NULL)
9102 s = bfd_get_section_by_name (obfd, ".plt");
9103 if (s == NULL)
9104 {
9105 /* This may happen for
9106 o references to TOC base (SYM@toc / TOC[tc0]) without a
9107 .toc directive
9108 o bad linker script
9109 o --gc-sections and empty TOC sections
9110
9111 FIXME: Warn user? */
9112
9113 /* Look for a likely section. We probably won't even be
9114 using TOCstart. */
9115 for (s = obfd->sections; s != NULL; s = s->next)
9116 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9117 == (SEC_ALLOC | SEC_SMALL_DATA))
9118 break;
9119 if (s == NULL)
9120 for (s = obfd->sections; s != NULL; s = s->next)
9121 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9122 == (SEC_ALLOC | SEC_SMALL_DATA))
9123 break;
9124 if (s == NULL)
9125 for (s = obfd->sections; s != NULL; s = s->next)
9126 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9127 break;
9128 if (s == NULL)
9129 for (s = obfd->sections; s != NULL; s = s->next)
9130 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9131 break;
9132 }
9133
9134 TOCstart = 0;
9135 if (s != NULL)
9136 TOCstart = s->output_section->vma + s->output_offset;
9137
9138 return TOCstart;
9139 }
9140
9141 /* Build all the stubs associated with the current output file.
9142 The stubs are kept in a hash table attached to the main linker
9143 hash table. This function is called via gldelf64ppc_finish. */
9144
9145 bfd_boolean
9146 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9147 struct bfd_link_info *info,
9148 char **stats)
9149 {
9150 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9151 asection *stub_sec;
9152 bfd_byte *p;
9153 int stub_sec_count = 0;
9154
9155 htab->emit_stub_syms = emit_stub_syms;
9156
9157 /* Allocate memory to hold the linker stubs. */
9158 for (stub_sec = htab->stub_bfd->sections;
9159 stub_sec != NULL;
9160 stub_sec = stub_sec->next)
9161 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9162 && stub_sec->size != 0)
9163 {
9164 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9165 if (stub_sec->contents == NULL)
9166 return FALSE;
9167 /* We want to check that built size is the same as calculated
9168 size. rawsize is a convenient location to use. */
9169 stub_sec->rawsize = stub_sec->size;
9170 stub_sec->size = 0;
9171 }
9172
9173 if (htab->plt != NULL)
9174 {
9175 unsigned int indx;
9176 bfd_vma plt0;
9177
9178 /* Build the .glink plt call stub. */
9179 plt0 = (htab->plt->output_section->vma
9180 + htab->plt->output_offset
9181 - (htab->glink->output_section->vma
9182 + htab->glink->output_offset
9183 + GLINK_CALL_STUB_SIZE));
9184 if (plt0 + 0x80008000 > 0xffffffff)
9185 {
9186 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9187 bfd_set_error (bfd_error_bad_value);
9188 return FALSE;
9189 }
9190
9191 if (htab->emit_stub_syms)
9192 {
9193 struct elf_link_hash_entry *h;
9194 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9195 if (h == NULL)
9196 return FALSE;
9197 if (h->root.type == bfd_link_hash_new)
9198 {
9199 h->root.type = bfd_link_hash_defined;
9200 h->root.u.def.section = htab->glink;
9201 h->root.u.def.value = 0;
9202 h->ref_regular = 1;
9203 h->def_regular = 1;
9204 h->ref_regular_nonweak = 1;
9205 h->forced_local = 1;
9206 h->non_elf = 0;
9207 }
9208 }
9209 p = htab->glink->contents;
9210 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9211 p += 4;
9212 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9213 p += 4;
9214 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9215 p += 4;
9216 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9217 p += 4;
9218 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9219 p += 4;
9220 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9221 p += 4;
9222 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9223 p += 4;
9224 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9225 p += 4;
9226 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9227 p += 4;
9228 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9229 p += 4;
9230 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9231 p += 4;
9232 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9233 p += 4;
9234 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9235 p += 4;
9236 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9237 p += 4;
9238 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9239 p += 4;
9240 bfd_put_32 (htab->glink->owner, BCTR, p);
9241 p += 4;
9242
9243 /* Build the .glink lazy link call stubs. */
9244 indx = 0;
9245 while (p < htab->glink->contents + htab->glink->size)
9246 {
9247 if (indx < 0x8000)
9248 {
9249 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9250 p += 4;
9251 }
9252 else
9253 {
9254 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9255 p += 4;
9256 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9257 p += 4;
9258 }
9259 bfd_put_32 (htab->glink->owner,
9260 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9261 indx++;
9262 p += 4;
9263 }
9264 htab->glink->rawsize = p - htab->glink->contents;
9265 }
9266
9267 if (htab->brlt->size != 0)
9268 {
9269 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9270 htab->brlt->size);
9271 if (htab->brlt->contents == NULL)
9272 return FALSE;
9273 }
9274 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9275 {
9276 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9277 htab->relbrlt->size);
9278 if (htab->relbrlt->contents == NULL)
9279 return FALSE;
9280 }
9281
9282 /* Build the stubs as directed by the stub hash table. */
9283 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9284
9285 for (stub_sec = htab->stub_bfd->sections;
9286 stub_sec != NULL;
9287 stub_sec = stub_sec->next)
9288 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9289 {
9290 stub_sec_count += 1;
9291 if (stub_sec->rawsize != stub_sec->size)
9292 break;
9293 }
9294
9295 if (stub_sec != NULL
9296 || htab->glink->rawsize != htab->glink->size)
9297 {
9298 htab->stub_error = TRUE;
9299 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9300 }
9301
9302 if (htab->stub_error)
9303 return FALSE;
9304
9305 if (stats != NULL)
9306 {
9307 *stats = bfd_malloc (500);
9308 if (*stats == NULL)
9309 return FALSE;
9310
9311 sprintf (*stats, _("linker stubs in %u group%s\n"
9312 " branch %lu\n"
9313 " toc adjust %lu\n"
9314 " long branch %lu\n"
9315 " long toc adj %lu\n"
9316 " plt call %lu"),
9317 stub_sec_count,
9318 stub_sec_count == 1 ? "" : "s",
9319 htab->stub_count[ppc_stub_long_branch - 1],
9320 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9321 htab->stub_count[ppc_stub_plt_branch - 1],
9322 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9323 htab->stub_count[ppc_stub_plt_call - 1]);
9324 }
9325 return TRUE;
9326 }
9327
9328 /* This function undoes the changes made by add_symbol_adjust. */
9329
9330 static bfd_boolean
9331 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9332 {
9333 struct ppc_link_hash_entry *eh;
9334
9335 if (h->root.type == bfd_link_hash_indirect)
9336 return TRUE;
9337
9338 if (h->root.type == bfd_link_hash_warning)
9339 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9340
9341 eh = (struct ppc_link_hash_entry *) h;
9342 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9343 return TRUE;
9344
9345 eh->elf.root.type = bfd_link_hash_undefined;
9346 return TRUE;
9347 }
9348
9349 void
9350 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9351 {
9352 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9353 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9354 }
9355
9356 /* The RELOCATE_SECTION function is called by the ELF backend linker
9357 to handle the relocations for a section.
9358
9359 The relocs are always passed as Rela structures; if the section
9360 actually uses Rel structures, the r_addend field will always be
9361 zero.
9362
9363 This function is responsible for adjust the section contents as
9364 necessary, and (if using Rela relocs and generating a
9365 relocatable output file) adjusting the reloc addend as
9366 necessary.
9367
9368 This function does not have to worry about setting the reloc
9369 address or the reloc symbol index.
9370
9371 LOCAL_SYMS is a pointer to the swapped in local symbols.
9372
9373 LOCAL_SECTIONS is an array giving the section in the input file
9374 corresponding to the st_shndx field of each local symbol.
9375
9376 The global hash table entry for the global symbols can be found
9377 via elf_sym_hashes (input_bfd).
9378
9379 When generating relocatable output, this function must handle
9380 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9381 going to be the section symbol corresponding to the output
9382 section, which means that the addend must be adjusted
9383 accordingly. */
9384
9385 static bfd_boolean
9386 ppc64_elf_relocate_section (bfd *output_bfd,
9387 struct bfd_link_info *info,
9388 bfd *input_bfd,
9389 asection *input_section,
9390 bfd_byte *contents,
9391 Elf_Internal_Rela *relocs,
9392 Elf_Internal_Sym *local_syms,
9393 asection **local_sections)
9394 {
9395 struct ppc_link_hash_table *htab;
9396 Elf_Internal_Shdr *symtab_hdr;
9397 struct elf_link_hash_entry **sym_hashes;
9398 Elf_Internal_Rela *rel;
9399 Elf_Internal_Rela *relend;
9400 Elf_Internal_Rela outrel;
9401 bfd_byte *loc;
9402 struct got_entry **local_got_ents;
9403 bfd_vma TOCstart;
9404 bfd_boolean ret = TRUE;
9405 bfd_boolean is_opd;
9406 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9407 bfd_boolean is_power4 = FALSE;
9408
9409 if (info->relocatable)
9410 return TRUE;
9411
9412 /* Initialize howto table if needed. */
9413 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9414 ppc_howto_init ();
9415
9416 htab = ppc_hash_table (info);
9417
9418 /* Don't relocate stub sections. */
9419 if (input_section->owner == htab->stub_bfd)
9420 return TRUE;
9421
9422 local_got_ents = elf_local_got_ents (input_bfd);
9423 TOCstart = elf_gp (output_bfd);
9424 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9425 sym_hashes = elf_sym_hashes (input_bfd);
9426 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9427
9428 rel = relocs;
9429 relend = relocs + input_section->reloc_count;
9430 for (; rel < relend; rel++)
9431 {
9432 enum elf_ppc64_reloc_type r_type;
9433 bfd_vma addend;
9434 bfd_reloc_status_type r;
9435 Elf_Internal_Sym *sym;
9436 asection *sec;
9437 struct elf_link_hash_entry *h_elf;
9438 struct ppc_link_hash_entry *h;
9439 struct ppc_link_hash_entry *fdh;
9440 const char *sym_name;
9441 unsigned long r_symndx, toc_symndx;
9442 char tls_mask, tls_gd, tls_type;
9443 char sym_type;
9444 bfd_vma relocation;
9445 bfd_boolean unresolved_reloc;
9446 bfd_boolean warned;
9447 unsigned long insn, mask;
9448 struct ppc_stub_hash_entry *stub_entry;
9449 bfd_vma max_br_offset;
9450 bfd_vma from;
9451
9452 r_type = ELF64_R_TYPE (rel->r_info);
9453 r_symndx = ELF64_R_SYM (rel->r_info);
9454
9455 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9456 symbol of the previous ADDR64 reloc. The symbol gives us the
9457 proper TOC base to use. */
9458 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9459 && rel != relocs
9460 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9461 && is_opd)
9462 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9463
9464 sym = NULL;
9465 sec = NULL;
9466 h_elf = NULL;
9467 sym_name = NULL;
9468 unresolved_reloc = FALSE;
9469 warned = FALSE;
9470
9471 if (r_symndx < symtab_hdr->sh_info)
9472 {
9473 /* It's a local symbol. */
9474 long *opd_adjust;
9475
9476 sym = local_syms + r_symndx;
9477 sec = local_sections[r_symndx];
9478 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9479 sym_type = ELF64_ST_TYPE (sym->st_info);
9480 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9481 opd_adjust = get_opd_info (sec);
9482 if (opd_adjust != NULL)
9483 {
9484 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9485 if (adjust == -1)
9486 relocation = 0;
9487 else
9488 relocation += adjust;
9489 }
9490 }
9491 else
9492 {
9493 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9494 r_symndx, symtab_hdr, sym_hashes,
9495 h_elf, sec, relocation,
9496 unresolved_reloc, warned);
9497 sym_name = h_elf->root.root.string;
9498 sym_type = h_elf->type;
9499 }
9500 h = (struct ppc_link_hash_entry *) h_elf;
9501
9502 /* TLS optimizations. Replace instruction sequences and relocs
9503 based on information we collected in tls_optimize. We edit
9504 RELOCS so that --emit-relocs will output something sensible
9505 for the final instruction stream. */
9506 tls_mask = 0;
9507 tls_gd = 0;
9508 toc_symndx = 0;
9509 if (IS_PPC64_TLS_RELOC (r_type))
9510 {
9511 if (h != NULL)
9512 tls_mask = h->tls_mask;
9513 else if (local_got_ents != NULL)
9514 {
9515 char *lgot_masks;
9516 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9517 tls_mask = lgot_masks[r_symndx];
9518 }
9519 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9520 {
9521 /* Check for toc tls entries. */
9522 char *toc_tls;
9523
9524 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9525 rel, input_bfd))
9526 return FALSE;
9527
9528 if (toc_tls)
9529 tls_mask = *toc_tls;
9530 }
9531 }
9532
9533 /* Check that tls relocs are used with tls syms, and non-tls
9534 relocs are used with non-tls syms. */
9535 if (r_symndx != 0
9536 && r_type != R_PPC64_NONE
9537 && (h == NULL
9538 || h->elf.root.type == bfd_link_hash_defined
9539 || h->elf.root.type == bfd_link_hash_defweak)
9540 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9541 {
9542 if (r_type == R_PPC64_TLS && tls_mask != 0)
9543 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9544 ;
9545 else
9546 (*_bfd_error_handler)
9547 (sym_type == STT_TLS
9548 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9549 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9550 input_bfd,
9551 input_section,
9552 (long) rel->r_offset,
9553 ppc64_elf_howto_table[r_type]->name,
9554 sym_name);
9555 }
9556
9557 /* Ensure reloc mapping code below stays sane. */
9558 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9559 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9560 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9561 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9562 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9563 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9564 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9565 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9566 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9567 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9568 abort ();
9569
9570 switch (r_type)
9571 {
9572 default:
9573 break;
9574
9575 case R_PPC64_TOC16:
9576 case R_PPC64_TOC16_LO:
9577 case R_PPC64_TOC16_DS:
9578 case R_PPC64_TOC16_LO_DS:
9579 {
9580 /* Check for toc tls entries. */
9581 char *toc_tls;
9582 int retval;
9583
9584 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9585 rel, input_bfd);
9586 if (retval == 0)
9587 return FALSE;
9588
9589 if (toc_tls)
9590 {
9591 tls_mask = *toc_tls;
9592 if (r_type == R_PPC64_TOC16_DS
9593 || r_type == R_PPC64_TOC16_LO_DS)
9594 {
9595 if (tls_mask != 0
9596 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9597 goto toctprel;
9598 }
9599 else
9600 {
9601 /* If we found a GD reloc pair, then we might be
9602 doing a GD->IE transition. */
9603 if (retval == 2)
9604 {
9605 tls_gd = TLS_TPRELGD;
9606 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9607 goto tls_get_addr_check;
9608 }
9609 else if (retval == 3)
9610 {
9611 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9612 goto tls_get_addr_check;
9613 }
9614 }
9615 }
9616 }
9617 break;
9618
9619 case R_PPC64_GOT_TPREL16_DS:
9620 case R_PPC64_GOT_TPREL16_LO_DS:
9621 if (tls_mask != 0
9622 && (tls_mask & TLS_TPREL) == 0)
9623 {
9624 toctprel:
9625 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9626 insn &= 31 << 21;
9627 insn |= 0x3c0d0000; /* addis 0,13,0 */
9628 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9629 r_type = R_PPC64_TPREL16_HA;
9630 if (toc_symndx != 0)
9631 {
9632 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9633 /* We changed the symbol. Start over in order to
9634 get h, sym, sec etc. right. */
9635 rel--;
9636 continue;
9637 }
9638 else
9639 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9640 }
9641 break;
9642
9643 case R_PPC64_TLS:
9644 if (tls_mask != 0
9645 && (tls_mask & TLS_TPREL) == 0)
9646 {
9647 bfd_vma rtra;
9648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9649 if ((insn & ((0x3f << 26) | (31 << 11)))
9650 == ((31 << 26) | (13 << 11)))
9651 rtra = insn & ((1 << 26) - (1 << 16));
9652 else if ((insn & ((0x3f << 26) | (31 << 16)))
9653 == ((31 << 26) | (13 << 16)))
9654 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9655 else
9656 abort ();
9657 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9658 /* add -> addi. */
9659 insn = 14 << 26;
9660 else if ((insn & (31 << 1)) == 23 << 1
9661 && ((insn & (31 << 6)) < 14 << 6
9662 || ((insn & (31 << 6)) >= 16 << 6
9663 && (insn & (31 << 6)) < 24 << 6)))
9664 /* load and store indexed -> dform. */
9665 insn = (32 | ((insn >> 6) & 31)) << 26;
9666 else if ((insn & (31 << 1)) == 21 << 1
9667 && (insn & (0x1a << 6)) == 0)
9668 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9669 insn = (((58 | ((insn >> 6) & 4)) << 26)
9670 | ((insn >> 6) & 1));
9671 else if ((insn & (31 << 1)) == 21 << 1
9672 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9673 /* lwax -> lwa. */
9674 insn = (58 << 26) | 2;
9675 else
9676 abort ();
9677 insn |= rtra;
9678 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9679 /* Was PPC64_TLS which sits on insn boundary, now
9680 PPC64_TPREL16_LO which is at insn+2. */
9681 rel->r_offset += 2;
9682 r_type = R_PPC64_TPREL16_LO;
9683 if (toc_symndx != 0)
9684 {
9685 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9686 /* We changed the symbol. Start over in order to
9687 get h, sym, sec etc. right. */
9688 rel--;
9689 continue;
9690 }
9691 else
9692 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9693 }
9694 break;
9695
9696 case R_PPC64_GOT_TLSGD16_HI:
9697 case R_PPC64_GOT_TLSGD16_HA:
9698 tls_gd = TLS_TPRELGD;
9699 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9700 goto tls_gdld_hi;
9701 break;
9702
9703 case R_PPC64_GOT_TLSLD16_HI:
9704 case R_PPC64_GOT_TLSLD16_HA:
9705 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9706 {
9707 tls_gdld_hi:
9708 if ((tls_mask & tls_gd) != 0)
9709 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9710 + R_PPC64_GOT_TPREL16_DS);
9711 else
9712 {
9713 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9714 rel->r_offset -= 2;
9715 r_type = R_PPC64_NONE;
9716 }
9717 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9718 }
9719 break;
9720
9721 case R_PPC64_GOT_TLSGD16:
9722 case R_PPC64_GOT_TLSGD16_LO:
9723 tls_gd = TLS_TPRELGD;
9724 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9725 goto tls_get_addr_check;
9726 break;
9727
9728 case R_PPC64_GOT_TLSLD16:
9729 case R_PPC64_GOT_TLSLD16_LO:
9730 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9731 {
9732 tls_get_addr_check:
9733 if (rel + 1 < relend)
9734 {
9735 enum elf_ppc64_reloc_type r_type2;
9736 unsigned long r_symndx2;
9737 struct elf_link_hash_entry *h2;
9738 bfd_vma insn1, insn2, insn3;
9739 bfd_vma offset;
9740
9741 /* The next instruction should be a call to
9742 __tls_get_addr. Peek at the reloc to be sure. */
9743 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9744 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9745 if (r_symndx2 < symtab_hdr->sh_info
9746 || (r_type2 != R_PPC64_REL14
9747 && r_type2 != R_PPC64_REL14_BRTAKEN
9748 && r_type2 != R_PPC64_REL14_BRNTAKEN
9749 && r_type2 != R_PPC64_REL24))
9750 break;
9751
9752 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9753 while (h2->root.type == bfd_link_hash_indirect
9754 || h2->root.type == bfd_link_hash_warning)
9755 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9756 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9757 && h2 != &htab->tls_get_addr_fd->elf))
9758 break;
9759
9760 /* OK, it checks out. Replace the call. */
9761 offset = rel[1].r_offset;
9762 insn1 = bfd_get_32 (output_bfd,
9763 contents + rel->r_offset - 2);
9764 insn3 = bfd_get_32 (output_bfd,
9765 contents + offset + 4);
9766 if ((tls_mask & tls_gd) != 0)
9767 {
9768 /* IE */
9769 insn1 &= (1 << 26) - (1 << 2);
9770 insn1 |= 58 << 26; /* ld */
9771 insn2 = 0x7c636a14; /* add 3,3,13 */
9772 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9773 if ((tls_mask & TLS_EXPLICIT) == 0)
9774 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9775 + R_PPC64_GOT_TPREL16_DS);
9776 else
9777 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9778 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9779 }
9780 else
9781 {
9782 /* LE */
9783 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9784 insn2 = 0x38630000; /* addi 3,3,0 */
9785 if (tls_gd == 0)
9786 {
9787 /* Was an LD reloc. */
9788 r_symndx = 0;
9789 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9790 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9791 }
9792 else if (toc_symndx != 0)
9793 r_symndx = toc_symndx;
9794 r_type = R_PPC64_TPREL16_HA;
9795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9796 rel[1].r_info = ELF64_R_INFO (r_symndx,
9797 R_PPC64_TPREL16_LO);
9798 rel[1].r_offset += 2;
9799 }
9800 if (insn3 == NOP
9801 || insn3 == CROR_151515 || insn3 == CROR_313131)
9802 {
9803 insn3 = insn2;
9804 insn2 = NOP;
9805 rel[1].r_offset += 4;
9806 }
9807 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9808 bfd_put_32 (output_bfd, insn2, contents + offset);
9809 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9810 if (tls_gd == 0 || toc_symndx != 0)
9811 {
9812 /* We changed the symbol. Start over in order
9813 to get h, sym, sec etc. right. */
9814 rel--;
9815 continue;
9816 }
9817 }
9818 }
9819 break;
9820
9821 case R_PPC64_DTPMOD64:
9822 if (rel + 1 < relend
9823 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9824 && rel[1].r_offset == rel->r_offset + 8)
9825 {
9826 if ((tls_mask & TLS_GD) == 0)
9827 {
9828 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9829 if ((tls_mask & TLS_TPRELGD) != 0)
9830 r_type = R_PPC64_TPREL64;
9831 else
9832 {
9833 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9834 r_type = R_PPC64_NONE;
9835 }
9836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9837 }
9838 }
9839 else
9840 {
9841 if ((tls_mask & TLS_LD) == 0)
9842 {
9843 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9844 r_type = R_PPC64_NONE;
9845 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9846 }
9847 }
9848 break;
9849
9850 case R_PPC64_TPREL64:
9851 if ((tls_mask & TLS_TPREL) == 0)
9852 {
9853 r_type = R_PPC64_NONE;
9854 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9855 }
9856 break;
9857 }
9858
9859 /* Handle other relocations that tweak non-addend part of insn. */
9860 insn = 0;
9861 max_br_offset = 1 << 25;
9862 addend = rel->r_addend;
9863 switch (r_type)
9864 {
9865 default:
9866 break;
9867
9868 /* Branch taken prediction relocations. */
9869 case R_PPC64_ADDR14_BRTAKEN:
9870 case R_PPC64_REL14_BRTAKEN:
9871 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9872 /* Fall thru. */
9873
9874 /* Branch not taken prediction relocations. */
9875 case R_PPC64_ADDR14_BRNTAKEN:
9876 case R_PPC64_REL14_BRNTAKEN:
9877 insn |= bfd_get_32 (output_bfd,
9878 contents + rel->r_offset) & ~(0x01 << 21);
9879 /* Fall thru. */
9880
9881 case R_PPC64_REL14:
9882 max_br_offset = 1 << 15;
9883 /* Fall thru. */
9884
9885 case R_PPC64_REL24:
9886 /* Calls to functions with a different TOC, such as calls to
9887 shared objects, need to alter the TOC pointer. This is
9888 done using a linkage stub. A REL24 branching to these
9889 linkage stubs needs to be followed by a nop, as the nop
9890 will be replaced with an instruction to restore the TOC
9891 base pointer. */
9892 stub_entry = NULL;
9893 fdh = h;
9894 if (((h != NULL
9895 && (((fdh = h->oh) != NULL
9896 && fdh->elf.plt.plist != NULL)
9897 || (fdh = h)->elf.plt.plist != NULL))
9898 || (sec != NULL
9899 && sec->output_section != NULL
9900 && sec->id <= htab->top_id
9901 && (htab->stub_group[sec->id].toc_off
9902 != htab->stub_group[input_section->id].toc_off)))
9903 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9904 rel, htab)) != NULL
9905 && (stub_entry->stub_type == ppc_stub_plt_call
9906 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9907 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9908 {
9909 bfd_boolean can_plt_call = FALSE;
9910
9911 if (rel->r_offset + 8 <= input_section->size)
9912 {
9913 unsigned long nop;
9914 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9915 if (nop == NOP
9916 || nop == CROR_151515 || nop == CROR_313131)
9917 {
9918 bfd_put_32 (input_bfd, LD_R2_40R1,
9919 contents + rel->r_offset + 4);
9920 can_plt_call = TRUE;
9921 }
9922 }
9923
9924 if (!can_plt_call)
9925 {
9926 if (stub_entry->stub_type == ppc_stub_plt_call)
9927 {
9928 /* If this is a plain branch rather than a branch
9929 and link, don't require a nop. */
9930 unsigned long br;
9931 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9932 if ((br & 1) == 0)
9933 can_plt_call = TRUE;
9934 }
9935 else if (h != NULL
9936 && strcmp (h->elf.root.root.string,
9937 ".__libc_start_main") == 0)
9938 {
9939 /* Allow crt1 branch to go via a toc adjusting stub. */
9940 can_plt_call = TRUE;
9941 }
9942 else
9943 {
9944 if (strcmp (input_section->output_section->name,
9945 ".init") == 0
9946 || strcmp (input_section->output_section->name,
9947 ".fini") == 0)
9948 (*_bfd_error_handler)
9949 (_("%B(%A+0x%lx): automatic multiple TOCs "
9950 "not supported using your crt files; "
9951 "recompile with -mminimal-toc or upgrade gcc"),
9952 input_bfd,
9953 input_section,
9954 (long) rel->r_offset);
9955 else
9956 (*_bfd_error_handler)
9957 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9958 "does not allow automatic multiple TOCs; "
9959 "recompile with -mminimal-toc or "
9960 "-fno-optimize-sibling-calls, "
9961 "or make `%s' extern"),
9962 input_bfd,
9963 input_section,
9964 (long) rel->r_offset,
9965 sym_name,
9966 sym_name);
9967 bfd_set_error (bfd_error_bad_value);
9968 ret = FALSE;
9969 }
9970 }
9971
9972 if (can_plt_call
9973 && stub_entry->stub_type == ppc_stub_plt_call)
9974 unresolved_reloc = FALSE;
9975 }
9976
9977 if (stub_entry == NULL
9978 && get_opd_info (sec) != NULL)
9979 {
9980 /* The branch destination is the value of the opd entry. */
9981 bfd_vma off = (relocation - sec->output_section->vma
9982 - sec->output_offset + rel->r_addend);
9983 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9984 if (dest != (bfd_vma) -1)
9985 {
9986 relocation = dest;
9987 addend = 0;
9988 }
9989 }
9990
9991 /* If the branch is out of reach we ought to have a long
9992 branch stub. */
9993 from = (rel->r_offset
9994 + input_section->output_offset
9995 + input_section->output_section->vma);
9996
9997 if (stub_entry == NULL
9998 && (relocation + rel->r_addend - from + max_br_offset
9999 >= 2 * max_br_offset)
10000 && r_type != R_PPC64_ADDR14_BRTAKEN
10001 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10002 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10003 htab);
10004
10005 if (stub_entry != NULL)
10006 {
10007 /* Munge up the value and addend so that we call the stub
10008 rather than the procedure directly. */
10009 relocation = (stub_entry->stub_offset
10010 + stub_entry->stub_sec->output_offset
10011 + stub_entry->stub_sec->output_section->vma);
10012 addend = 0;
10013 }
10014
10015 if (insn != 0)
10016 {
10017 if (is_power4)
10018 {
10019 /* Set 'a' bit. This is 0b00010 in BO field for branch
10020 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10021 for branch on CTR insns (BO == 1a00t or 1a01t). */
10022 if ((insn & (0x14 << 21)) == (0x04 << 21))
10023 insn |= 0x02 << 21;
10024 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10025 insn |= 0x08 << 21;
10026 else
10027 break;
10028 }
10029 else
10030 {
10031 /* Invert 'y' bit if not the default. */
10032 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10033 insn ^= 0x01 << 21;
10034 }
10035
10036 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10037 }
10038
10039 /* NOP out calls to undefined weak functions.
10040 We can thus call a weak function without first
10041 checking whether the function is defined. */
10042 else if (h != NULL
10043 && h->elf.root.type == bfd_link_hash_undefweak
10044 && r_type == R_PPC64_REL24
10045 && relocation == 0
10046 && rel->r_addend == 0)
10047 {
10048 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10049 continue;
10050 }
10051 break;
10052 }
10053
10054 /* Set `addend'. */
10055 tls_type = 0;
10056 switch (r_type)
10057 {
10058 default:
10059 (*_bfd_error_handler)
10060 (_("%B: unknown relocation type %d for symbol %s"),
10061 input_bfd, (int) r_type, sym_name);
10062
10063 bfd_set_error (bfd_error_bad_value);
10064 ret = FALSE;
10065 continue;
10066
10067 case R_PPC64_NONE:
10068 case R_PPC64_TLS:
10069 case R_PPC64_GNU_VTINHERIT:
10070 case R_PPC64_GNU_VTENTRY:
10071 continue;
10072
10073 /* GOT16 relocations. Like an ADDR16 using the symbol's
10074 address in the GOT as relocation value instead of the
10075 symbol's value itself. Also, create a GOT entry for the
10076 symbol and put the symbol value there. */
10077 case R_PPC64_GOT_TLSGD16:
10078 case R_PPC64_GOT_TLSGD16_LO:
10079 case R_PPC64_GOT_TLSGD16_HI:
10080 case R_PPC64_GOT_TLSGD16_HA:
10081 tls_type = TLS_TLS | TLS_GD;
10082 goto dogot;
10083
10084 case R_PPC64_GOT_TLSLD16:
10085 case R_PPC64_GOT_TLSLD16_LO:
10086 case R_PPC64_GOT_TLSLD16_HI:
10087 case R_PPC64_GOT_TLSLD16_HA:
10088 tls_type = TLS_TLS | TLS_LD;
10089 goto dogot;
10090
10091 case R_PPC64_GOT_TPREL16_DS:
10092 case R_PPC64_GOT_TPREL16_LO_DS:
10093 case R_PPC64_GOT_TPREL16_HI:
10094 case R_PPC64_GOT_TPREL16_HA:
10095 tls_type = TLS_TLS | TLS_TPREL;
10096 goto dogot;
10097
10098 case R_PPC64_GOT_DTPREL16_DS:
10099 case R_PPC64_GOT_DTPREL16_LO_DS:
10100 case R_PPC64_GOT_DTPREL16_HI:
10101 case R_PPC64_GOT_DTPREL16_HA:
10102 tls_type = TLS_TLS | TLS_DTPREL;
10103 goto dogot;
10104
10105 case R_PPC64_GOT16:
10106 case R_PPC64_GOT16_LO:
10107 case R_PPC64_GOT16_HI:
10108 case R_PPC64_GOT16_HA:
10109 case R_PPC64_GOT16_DS:
10110 case R_PPC64_GOT16_LO_DS:
10111 dogot:
10112 {
10113 /* Relocation is to the entry for this symbol in the global
10114 offset table. */
10115 asection *got;
10116 bfd_vma *offp;
10117 bfd_vma off;
10118 unsigned long indx = 0;
10119
10120 if (tls_type == (TLS_TLS | TLS_LD)
10121 && (h == NULL
10122 || !h->elf.def_dynamic))
10123 offp = &ppc64_tlsld_got (input_bfd)->offset;
10124 else
10125 {
10126 struct got_entry *ent;
10127
10128 if (h != NULL)
10129 {
10130 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10131 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10132 &h->elf)
10133 || (info->shared
10134 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10135 /* This is actually a static link, or it is a
10136 -Bsymbolic link and the symbol is defined
10137 locally, or the symbol was forced to be local
10138 because of a version file. */
10139 ;
10140 else
10141 {
10142 indx = h->elf.dynindx;
10143 unresolved_reloc = FALSE;
10144 }
10145 ent = h->elf.got.glist;
10146 }
10147 else
10148 {
10149 if (local_got_ents == NULL)
10150 abort ();
10151 ent = local_got_ents[r_symndx];
10152 }
10153
10154 for (; ent != NULL; ent = ent->next)
10155 if (ent->addend == rel->r_addend
10156 && ent->owner == input_bfd
10157 && ent->tls_type == tls_type)
10158 break;
10159 if (ent == NULL)
10160 abort ();
10161 offp = &ent->got.offset;
10162 }
10163
10164 got = ppc64_elf_tdata (input_bfd)->got;
10165 if (got == NULL)
10166 abort ();
10167
10168 /* The offset must always be a multiple of 8. We use the
10169 least significant bit to record whether we have already
10170 processed this entry. */
10171 off = *offp;
10172 if ((off & 1) != 0)
10173 off &= ~1;
10174 else
10175 {
10176 /* Generate relocs for the dynamic linker, except in
10177 the case of TLSLD where we'll use one entry per
10178 module. */
10179 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10180
10181 *offp = off | 1;
10182 if ((info->shared || indx != 0)
10183 && (h == NULL
10184 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10185 || h->elf.root.type != bfd_link_hash_undefweak))
10186 {
10187 outrel.r_offset = (got->output_section->vma
10188 + got->output_offset
10189 + off);
10190 outrel.r_addend = rel->r_addend;
10191 if (tls_type & (TLS_LD | TLS_GD))
10192 {
10193 outrel.r_addend = 0;
10194 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10195 if (tls_type == (TLS_TLS | TLS_GD))
10196 {
10197 loc = relgot->contents;
10198 loc += (relgot->reloc_count++
10199 * sizeof (Elf64_External_Rela));
10200 bfd_elf64_swap_reloca_out (output_bfd,
10201 &outrel, loc);
10202 outrel.r_offset += 8;
10203 outrel.r_addend = rel->r_addend;
10204 outrel.r_info
10205 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10206 }
10207 }
10208 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10209 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10210 else if (tls_type == (TLS_TLS | TLS_TPREL))
10211 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10212 else if (indx == 0)
10213 {
10214 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10215
10216 /* Write the .got section contents for the sake
10217 of prelink. */
10218 loc = got->contents + off;
10219 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10220 loc);
10221 }
10222 else
10223 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10224
10225 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10226 {
10227 outrel.r_addend += relocation;
10228 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10229 outrel.r_addend -= htab->elf.tls_sec->vma;
10230 }
10231 loc = relgot->contents;
10232 loc += (relgot->reloc_count++
10233 * sizeof (Elf64_External_Rela));
10234 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10235 }
10236
10237 /* Init the .got section contents here if we're not
10238 emitting a reloc. */
10239 else
10240 {
10241 relocation += rel->r_addend;
10242 if (tls_type == (TLS_TLS | TLS_LD))
10243 relocation = 1;
10244 else if (tls_type != 0)
10245 {
10246 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10247 if (tls_type == (TLS_TLS | TLS_TPREL))
10248 relocation += DTP_OFFSET - TP_OFFSET;
10249
10250 if (tls_type == (TLS_TLS | TLS_GD))
10251 {
10252 bfd_put_64 (output_bfd, relocation,
10253 got->contents + off + 8);
10254 relocation = 1;
10255 }
10256 }
10257
10258 bfd_put_64 (output_bfd, relocation,
10259 got->contents + off);
10260 }
10261 }
10262
10263 if (off >= (bfd_vma) -2)
10264 abort ();
10265
10266 relocation = got->output_offset + off;
10267
10268 /* TOC base (r2) is TOC start plus 0x8000. */
10269 addend = -TOC_BASE_OFF;
10270 }
10271 break;
10272
10273 case R_PPC64_PLT16_HA:
10274 case R_PPC64_PLT16_HI:
10275 case R_PPC64_PLT16_LO:
10276 case R_PPC64_PLT32:
10277 case R_PPC64_PLT64:
10278 /* Relocation is to the entry for this symbol in the
10279 procedure linkage table. */
10280
10281 /* Resolve a PLT reloc against a local symbol directly,
10282 without using the procedure linkage table. */
10283 if (h == NULL)
10284 break;
10285
10286 /* It's possible that we didn't make a PLT entry for this
10287 symbol. This happens when statically linking PIC code,
10288 or when using -Bsymbolic. Go find a match if there is a
10289 PLT entry. */
10290 if (htab->plt != NULL)
10291 {
10292 struct plt_entry *ent;
10293 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10294 if (ent->addend == rel->r_addend
10295 && ent->plt.offset != (bfd_vma) -1)
10296 {
10297 relocation = (htab->plt->output_section->vma
10298 + htab->plt->output_offset
10299 + ent->plt.offset);
10300 unresolved_reloc = FALSE;
10301 }
10302 }
10303 break;
10304
10305 case R_PPC64_TOC:
10306 /* Relocation value is TOC base. */
10307 relocation = TOCstart;
10308 if (r_symndx == 0)
10309 relocation += htab->stub_group[input_section->id].toc_off;
10310 else if (unresolved_reloc)
10311 ;
10312 else if (sec != NULL && sec->id <= htab->top_id)
10313 relocation += htab->stub_group[sec->id].toc_off;
10314 else
10315 unresolved_reloc = TRUE;
10316 goto dodyn2;
10317
10318 /* TOC16 relocs. We want the offset relative to the TOC base,
10319 which is the address of the start of the TOC plus 0x8000.
10320 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10321 in this order. */
10322 case R_PPC64_TOC16:
10323 case R_PPC64_TOC16_LO:
10324 case R_PPC64_TOC16_HI:
10325 case R_PPC64_TOC16_DS:
10326 case R_PPC64_TOC16_LO_DS:
10327 case R_PPC64_TOC16_HA:
10328 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10329 break;
10330
10331 /* Relocate against the beginning of the section. */
10332 case R_PPC64_SECTOFF:
10333 case R_PPC64_SECTOFF_LO:
10334 case R_PPC64_SECTOFF_HI:
10335 case R_PPC64_SECTOFF_DS:
10336 case R_PPC64_SECTOFF_LO_DS:
10337 case R_PPC64_SECTOFF_HA:
10338 if (sec != NULL)
10339 addend -= sec->output_section->vma;
10340 break;
10341
10342 case R_PPC64_REL14:
10343 case R_PPC64_REL14_BRNTAKEN:
10344 case R_PPC64_REL14_BRTAKEN:
10345 case R_PPC64_REL24:
10346 break;
10347
10348 case R_PPC64_TPREL16:
10349 case R_PPC64_TPREL16_LO:
10350 case R_PPC64_TPREL16_HI:
10351 case R_PPC64_TPREL16_HA:
10352 case R_PPC64_TPREL16_DS:
10353 case R_PPC64_TPREL16_LO_DS:
10354 case R_PPC64_TPREL16_HIGHER:
10355 case R_PPC64_TPREL16_HIGHERA:
10356 case R_PPC64_TPREL16_HIGHEST:
10357 case R_PPC64_TPREL16_HIGHESTA:
10358 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10359 if (info->shared)
10360 /* The TPREL16 relocs shouldn't really be used in shared
10361 libs as they will result in DT_TEXTREL being set, but
10362 support them anyway. */
10363 goto dodyn;
10364 break;
10365
10366 case R_PPC64_DTPREL16:
10367 case R_PPC64_DTPREL16_LO:
10368 case R_PPC64_DTPREL16_HI:
10369 case R_PPC64_DTPREL16_HA:
10370 case R_PPC64_DTPREL16_DS:
10371 case R_PPC64_DTPREL16_LO_DS:
10372 case R_PPC64_DTPREL16_HIGHER:
10373 case R_PPC64_DTPREL16_HIGHERA:
10374 case R_PPC64_DTPREL16_HIGHEST:
10375 case R_PPC64_DTPREL16_HIGHESTA:
10376 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10377 break;
10378
10379 case R_PPC64_DTPMOD64:
10380 relocation = 1;
10381 addend = 0;
10382 goto dodyn;
10383
10384 case R_PPC64_TPREL64:
10385 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10386 goto dodyn;
10387
10388 case R_PPC64_DTPREL64:
10389 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10390 /* Fall thru */
10391
10392 /* Relocations that may need to be propagated if this is a
10393 dynamic object. */
10394 case R_PPC64_REL30:
10395 case R_PPC64_REL32:
10396 case R_PPC64_REL64:
10397 case R_PPC64_ADDR14:
10398 case R_PPC64_ADDR14_BRNTAKEN:
10399 case R_PPC64_ADDR14_BRTAKEN:
10400 case R_PPC64_ADDR16:
10401 case R_PPC64_ADDR16_DS:
10402 case R_PPC64_ADDR16_HA:
10403 case R_PPC64_ADDR16_HI:
10404 case R_PPC64_ADDR16_HIGHER:
10405 case R_PPC64_ADDR16_HIGHERA:
10406 case R_PPC64_ADDR16_HIGHEST:
10407 case R_PPC64_ADDR16_HIGHESTA:
10408 case R_PPC64_ADDR16_LO:
10409 case R_PPC64_ADDR16_LO_DS:
10410 case R_PPC64_ADDR24:
10411 case R_PPC64_ADDR32:
10412 case R_PPC64_ADDR64:
10413 case R_PPC64_UADDR16:
10414 case R_PPC64_UADDR32:
10415 case R_PPC64_UADDR64:
10416 /* r_symndx will be zero only for relocs against symbols
10417 from removed linkonce sections, or sections discarded by
10418 a linker script. */
10419 dodyn:
10420 if (r_symndx == 0)
10421 break;
10422 /* Fall thru. */
10423
10424 dodyn2:
10425 if ((input_section->flags & SEC_ALLOC) == 0)
10426 break;
10427
10428 if (NO_OPD_RELOCS && is_opd)
10429 break;
10430
10431 if ((info->shared
10432 && (h == NULL
10433 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10434 || h->elf.root.type != bfd_link_hash_undefweak)
10435 && (MUST_BE_DYN_RELOC (r_type)
10436 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10437 || (ELIMINATE_COPY_RELOCS
10438 && !info->shared
10439 && h != NULL
10440 && h->elf.dynindx != -1
10441 && !h->elf.non_got_ref
10442 && h->elf.def_dynamic
10443 && !h->elf.def_regular))
10444 {
10445 Elf_Internal_Rela outrel;
10446 bfd_boolean skip, relocate;
10447 asection *sreloc;
10448 bfd_byte *loc;
10449 bfd_vma out_off;
10450
10451 /* When generating a dynamic object, these relocations
10452 are copied into the output file to be resolved at run
10453 time. */
10454
10455 skip = FALSE;
10456 relocate = FALSE;
10457
10458 out_off = _bfd_elf_section_offset (output_bfd, info,
10459 input_section, rel->r_offset);
10460 if (out_off == (bfd_vma) -1)
10461 skip = TRUE;
10462 else if (out_off == (bfd_vma) -2)
10463 skip = TRUE, relocate = TRUE;
10464 out_off += (input_section->output_section->vma
10465 + input_section->output_offset);
10466 outrel.r_offset = out_off;
10467 outrel.r_addend = rel->r_addend;
10468
10469 /* Optimize unaligned reloc use. */
10470 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10471 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10472 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10473 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10474 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10475 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10476 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10477 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10478 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10479
10480 if (skip)
10481 memset (&outrel, 0, sizeof outrel);
10482 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10483 && !is_opd
10484 && r_type != R_PPC64_TOC)
10485 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10486 else
10487 {
10488 /* This symbol is local, or marked to become local,
10489 or this is an opd section reloc which must point
10490 at a local function. */
10491 outrel.r_addend += relocation;
10492 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10493 {
10494 if (is_opd && h != NULL)
10495 {
10496 /* Lie about opd entries. This case occurs
10497 when building shared libraries and we
10498 reference a function in another shared
10499 lib. The same thing happens for a weak
10500 definition in an application that's
10501 overridden by a strong definition in a
10502 shared lib. (I believe this is a generic
10503 bug in binutils handling of weak syms.)
10504 In these cases we won't use the opd
10505 entry in this lib. */
10506 unresolved_reloc = FALSE;
10507 }
10508 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10509
10510 /* We need to relocate .opd contents for ld.so.
10511 Prelink also wants simple and consistent rules
10512 for relocs. This make all RELATIVE relocs have
10513 *r_offset equal to r_addend. */
10514 relocate = TRUE;
10515 }
10516 else
10517 {
10518 long indx = 0;
10519
10520 if (bfd_is_abs_section (sec))
10521 ;
10522 else if (sec == NULL || sec->owner == NULL)
10523 {
10524 bfd_set_error (bfd_error_bad_value);
10525 return FALSE;
10526 }
10527 else
10528 {
10529 asection *osec;
10530
10531 osec = sec->output_section;
10532 indx = elf_section_data (osec)->dynindx;
10533
10534 /* We are turning this relocation into one
10535 against a section symbol, so subtract out
10536 the output section's address but not the
10537 offset of the input section in the output
10538 section. */
10539 outrel.r_addend -= osec->vma;
10540 }
10541
10542 outrel.r_info = ELF64_R_INFO (indx, r_type);
10543 }
10544 }
10545
10546 sreloc = elf_section_data (input_section)->sreloc;
10547 if (sreloc == NULL)
10548 abort ();
10549
10550 loc = sreloc->contents;
10551 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10552 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10553
10554 /* If this reloc is against an external symbol, it will
10555 be computed at runtime, so there's no need to do
10556 anything now. However, for the sake of prelink ensure
10557 that the section contents are a known value. */
10558 if (! relocate)
10559 {
10560 unresolved_reloc = FALSE;
10561 /* The value chosen here is quite arbitrary as ld.so
10562 ignores section contents except for the special
10563 case of .opd where the contents might be accessed
10564 before relocation. Choose zero, as that won't
10565 cause reloc overflow. */
10566 relocation = 0;
10567 addend = 0;
10568 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10569 to improve backward compatibility with older
10570 versions of ld. */
10571 if (r_type == R_PPC64_ADDR64)
10572 addend = outrel.r_addend;
10573 /* Adjust pc_relative relocs to have zero in *r_offset. */
10574 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10575 addend = (input_section->output_section->vma
10576 + input_section->output_offset
10577 + rel->r_offset);
10578 }
10579 }
10580 break;
10581
10582 case R_PPC64_COPY:
10583 case R_PPC64_GLOB_DAT:
10584 case R_PPC64_JMP_SLOT:
10585 case R_PPC64_RELATIVE:
10586 /* We shouldn't ever see these dynamic relocs in relocatable
10587 files. */
10588 /* Fall through. */
10589
10590 case R_PPC64_PLTGOT16:
10591 case R_PPC64_PLTGOT16_DS:
10592 case R_PPC64_PLTGOT16_HA:
10593 case R_PPC64_PLTGOT16_HI:
10594 case R_PPC64_PLTGOT16_LO:
10595 case R_PPC64_PLTGOT16_LO_DS:
10596 case R_PPC64_PLTREL32:
10597 case R_PPC64_PLTREL64:
10598 /* These ones haven't been implemented yet. */
10599
10600 (*_bfd_error_handler)
10601 (_("%B: relocation %s is not supported for symbol %s."),
10602 input_bfd,
10603 ppc64_elf_howto_table[r_type]->name, sym_name);
10604
10605 bfd_set_error (bfd_error_invalid_operation);
10606 ret = FALSE;
10607 continue;
10608 }
10609
10610 /* Do any further special processing. */
10611 switch (r_type)
10612 {
10613 default:
10614 break;
10615
10616 case R_PPC64_ADDR16_HA:
10617 case R_PPC64_ADDR16_HIGHERA:
10618 case R_PPC64_ADDR16_HIGHESTA:
10619 case R_PPC64_GOT16_HA:
10620 case R_PPC64_PLTGOT16_HA:
10621 case R_PPC64_PLT16_HA:
10622 case R_PPC64_TOC16_HA:
10623 case R_PPC64_SECTOFF_HA:
10624 case R_PPC64_TPREL16_HA:
10625 case R_PPC64_DTPREL16_HA:
10626 case R_PPC64_GOT_TLSGD16_HA:
10627 case R_PPC64_GOT_TLSLD16_HA:
10628 case R_PPC64_GOT_TPREL16_HA:
10629 case R_PPC64_GOT_DTPREL16_HA:
10630 case R_PPC64_TPREL16_HIGHER:
10631 case R_PPC64_TPREL16_HIGHERA:
10632 case R_PPC64_TPREL16_HIGHEST:
10633 case R_PPC64_TPREL16_HIGHESTA:
10634 case R_PPC64_DTPREL16_HIGHER:
10635 case R_PPC64_DTPREL16_HIGHERA:
10636 case R_PPC64_DTPREL16_HIGHEST:
10637 case R_PPC64_DTPREL16_HIGHESTA:
10638 /* It's just possible that this symbol is a weak symbol
10639 that's not actually defined anywhere. In that case,
10640 'sec' would be NULL, and we should leave the symbol
10641 alone (it will be set to zero elsewhere in the link). */
10642 if (sec != NULL)
10643 /* Add 0x10000 if sign bit in 0:15 is set.
10644 Bits 0:15 are not used. */
10645 addend += 0x8000;
10646 break;
10647
10648 case R_PPC64_ADDR16_DS:
10649 case R_PPC64_ADDR16_LO_DS:
10650 case R_PPC64_GOT16_DS:
10651 case R_PPC64_GOT16_LO_DS:
10652 case R_PPC64_PLT16_LO_DS:
10653 case R_PPC64_SECTOFF_DS:
10654 case R_PPC64_SECTOFF_LO_DS:
10655 case R_PPC64_TOC16_DS:
10656 case R_PPC64_TOC16_LO_DS:
10657 case R_PPC64_PLTGOT16_DS:
10658 case R_PPC64_PLTGOT16_LO_DS:
10659 case R_PPC64_GOT_TPREL16_DS:
10660 case R_PPC64_GOT_TPREL16_LO_DS:
10661 case R_PPC64_GOT_DTPREL16_DS:
10662 case R_PPC64_GOT_DTPREL16_LO_DS:
10663 case R_PPC64_TPREL16_DS:
10664 case R_PPC64_TPREL16_LO_DS:
10665 case R_PPC64_DTPREL16_DS:
10666 case R_PPC64_DTPREL16_LO_DS:
10667 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10668 mask = 3;
10669 /* If this reloc is against an lq insn, then the value must be
10670 a multiple of 16. This is somewhat of a hack, but the
10671 "correct" way to do this by defining _DQ forms of all the
10672 _DS relocs bloats all reloc switches in this file. It
10673 doesn't seem to make much sense to use any of these relocs
10674 in data, so testing the insn should be safe. */
10675 if ((insn & (0x3f << 26)) == (56u << 26))
10676 mask = 15;
10677 if (((relocation + addend) & mask) != 0)
10678 {
10679 (*_bfd_error_handler)
10680 (_("%B: error: relocation %s not a multiple of %d"),
10681 input_bfd,
10682 ppc64_elf_howto_table[r_type]->name,
10683 mask + 1);
10684 bfd_set_error (bfd_error_bad_value);
10685 ret = FALSE;
10686 continue;
10687 }
10688 break;
10689 }
10690
10691 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10692 because such sections are not SEC_ALLOC and thus ld.so will
10693 not process them. */
10694 if (unresolved_reloc
10695 && !((input_section->flags & SEC_DEBUGGING) != 0
10696 && h->elf.def_dynamic))
10697 {
10698 (*_bfd_error_handler)
10699 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10700 input_bfd,
10701 input_section,
10702 (long) rel->r_offset,
10703 ppc64_elf_howto_table[(int) r_type]->name,
10704 h->elf.root.root.string);
10705 ret = FALSE;
10706 }
10707
10708 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10709 input_bfd,
10710 input_section,
10711 contents,
10712 rel->r_offset,
10713 relocation,
10714 addend);
10715
10716 if (r != bfd_reloc_ok)
10717 {
10718 if (sym_name == NULL)
10719 sym_name = "(null)";
10720 if (r == bfd_reloc_overflow)
10721 {
10722 if (warned)
10723 continue;
10724 if (h != NULL
10725 && h->elf.root.type == bfd_link_hash_undefweak
10726 && ppc64_elf_howto_table[r_type]->pc_relative)
10727 {
10728 /* Assume this is a call protected by other code that
10729 detects the symbol is undefined. If this is the case,
10730 we can safely ignore the overflow. If not, the
10731 program is hosed anyway, and a little warning isn't
10732 going to help. */
10733
10734 continue;
10735 }
10736
10737 if (!((*info->callbacks->reloc_overflow)
10738 (info, (h ? &h->elf.root : NULL), sym_name,
10739 ppc64_elf_howto_table[r_type]->name,
10740 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10741 return FALSE;
10742 }
10743 else
10744 {
10745 (*_bfd_error_handler)
10746 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10747 input_bfd,
10748 input_section,
10749 (long) rel->r_offset,
10750 ppc64_elf_howto_table[r_type]->name,
10751 sym_name,
10752 (int) r);
10753 ret = FALSE;
10754 }
10755 }
10756 }
10757
10758 /* If we're emitting relocations, then shortly after this function
10759 returns, reloc offsets and addends for this section will be
10760 adjusted. Worse, reloc symbol indices will be for the output
10761 file rather than the input. Save a copy of the relocs for
10762 opd_entry_value. */
10763 if (is_opd && info->emitrelocations)
10764 {
10765 bfd_size_type amt;
10766 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10767 rel = bfd_alloc (input_bfd, amt);
10768 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10769 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10770 if (rel == NULL)
10771 return FALSE;
10772 memcpy (rel, relocs, amt);
10773 }
10774 return ret;
10775 }
10776
10777 /* Adjust the value of any local symbols in opd sections. */
10778
10779 static bfd_boolean
10780 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10781 const char *name ATTRIBUTE_UNUSED,
10782 Elf_Internal_Sym *elfsym,
10783 asection *input_sec,
10784 struct elf_link_hash_entry *h)
10785 {
10786 long *opd_adjust, adjust;
10787 bfd_vma value;
10788
10789 if (h != NULL)
10790 return TRUE;
10791
10792 opd_adjust = get_opd_info (input_sec);
10793 if (opd_adjust == NULL)
10794 return TRUE;
10795
10796 value = elfsym->st_value - input_sec->output_offset;
10797 if (!info->relocatable)
10798 value -= input_sec->output_section->vma;
10799
10800 adjust = opd_adjust[value / 8];
10801 if (adjust == -1)
10802 elfsym->st_value = 0;
10803 else
10804 elfsym->st_value += adjust;
10805 return TRUE;
10806 }
10807
10808 /* Finish up dynamic symbol handling. We set the contents of various
10809 dynamic sections here. */
10810
10811 static bfd_boolean
10812 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10813 struct bfd_link_info *info,
10814 struct elf_link_hash_entry *h,
10815 Elf_Internal_Sym *sym)
10816 {
10817 struct ppc_link_hash_table *htab;
10818 bfd *dynobj;
10819 struct plt_entry *ent;
10820 Elf_Internal_Rela rela;
10821 bfd_byte *loc;
10822
10823 htab = ppc_hash_table (info);
10824 dynobj = htab->elf.dynobj;
10825
10826 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10827 if (ent->plt.offset != (bfd_vma) -1)
10828 {
10829 /* This symbol has an entry in the procedure linkage
10830 table. Set it up. */
10831
10832 if (htab->plt == NULL
10833 || htab->relplt == NULL
10834 || htab->glink == NULL)
10835 abort ();
10836
10837 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10838 fill in the PLT entry. */
10839 rela.r_offset = (htab->plt->output_section->vma
10840 + htab->plt->output_offset
10841 + ent->plt.offset);
10842 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10843 rela.r_addend = ent->addend;
10844
10845 loc = htab->relplt->contents;
10846 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10847 * sizeof (Elf64_External_Rela));
10848 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10849 }
10850
10851 if (h->needs_copy)
10852 {
10853 Elf_Internal_Rela rela;
10854 bfd_byte *loc;
10855
10856 /* This symbol needs a copy reloc. Set it up. */
10857
10858 if (h->dynindx == -1
10859 || (h->root.type != bfd_link_hash_defined
10860 && h->root.type != bfd_link_hash_defweak)
10861 || htab->relbss == NULL)
10862 abort ();
10863
10864 rela.r_offset = (h->root.u.def.value
10865 + h->root.u.def.section->output_section->vma
10866 + h->root.u.def.section->output_offset);
10867 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10868 rela.r_addend = 0;
10869 loc = htab->relbss->contents;
10870 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10871 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10872 }
10873
10874 /* Mark some specially defined symbols as absolute. */
10875 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10876 sym->st_shndx = SHN_ABS;
10877
10878 return TRUE;
10879 }
10880
10881 /* Used to decide how to sort relocs in an optimal manner for the
10882 dynamic linker, before writing them out. */
10883
10884 static enum elf_reloc_type_class
10885 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10886 {
10887 enum elf_ppc64_reloc_type r_type;
10888
10889 r_type = ELF64_R_TYPE (rela->r_info);
10890 switch (r_type)
10891 {
10892 case R_PPC64_RELATIVE:
10893 return reloc_class_relative;
10894 case R_PPC64_JMP_SLOT:
10895 return reloc_class_plt;
10896 case R_PPC64_COPY:
10897 return reloc_class_copy;
10898 default:
10899 return reloc_class_normal;
10900 }
10901 }
10902
10903 /* Finish up the dynamic sections. */
10904
10905 static bfd_boolean
10906 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10907 struct bfd_link_info *info)
10908 {
10909 struct ppc_link_hash_table *htab;
10910 bfd *dynobj;
10911 asection *sdyn;
10912
10913 htab = ppc_hash_table (info);
10914 dynobj = htab->elf.dynobj;
10915 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10916
10917 if (htab->elf.dynamic_sections_created)
10918 {
10919 Elf64_External_Dyn *dyncon, *dynconend;
10920
10921 if (sdyn == NULL || htab->got == NULL)
10922 abort ();
10923
10924 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10925 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10926 for (; dyncon < dynconend; dyncon++)
10927 {
10928 Elf_Internal_Dyn dyn;
10929 asection *s;
10930
10931 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10932
10933 switch (dyn.d_tag)
10934 {
10935 default:
10936 continue;
10937
10938 case DT_PPC64_GLINK:
10939 s = htab->glink;
10940 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10941 /* We stupidly defined DT_PPC64_GLINK to be the start
10942 of glink rather than the first entry point, which is
10943 what ld.so needs, and now have a bigger stub to
10944 support automatic multiple TOCs. */
10945 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10946 break;
10947
10948 case DT_PPC64_OPD:
10949 s = bfd_get_section_by_name (output_bfd, ".opd");
10950 if (s == NULL)
10951 continue;
10952 dyn.d_un.d_ptr = s->vma;
10953 break;
10954
10955 case DT_PPC64_OPDSZ:
10956 s = bfd_get_section_by_name (output_bfd, ".opd");
10957 if (s == NULL)
10958 continue;
10959 dyn.d_un.d_val = s->size;
10960 break;
10961
10962 case DT_PLTGOT:
10963 s = htab->plt;
10964 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10965 break;
10966
10967 case DT_JMPREL:
10968 s = htab->relplt;
10969 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10970 break;
10971
10972 case DT_PLTRELSZ:
10973 dyn.d_un.d_val = htab->relplt->size;
10974 break;
10975
10976 case DT_RELASZ:
10977 /* Don't count procedure linkage table relocs in the
10978 overall reloc count. */
10979 s = htab->relplt;
10980 if (s == NULL)
10981 continue;
10982 dyn.d_un.d_val -= s->size;
10983 break;
10984
10985 case DT_RELA:
10986 /* We may not be using the standard ELF linker script.
10987 If .rela.plt is the first .rela section, we adjust
10988 DT_RELA to not include it. */
10989 s = htab->relplt;
10990 if (s == NULL)
10991 continue;
10992 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10993 continue;
10994 dyn.d_un.d_ptr += s->size;
10995 break;
10996 }
10997
10998 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10999 }
11000 }
11001
11002 if (htab->got != NULL && htab->got->size != 0)
11003 {
11004 /* Fill in the first entry in the global offset table.
11005 We use it to hold the link-time TOCbase. */
11006 bfd_put_64 (output_bfd,
11007 elf_gp (output_bfd) + TOC_BASE_OFF,
11008 htab->got->contents);
11009
11010 /* Set .got entry size. */
11011 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11012 }
11013
11014 if (htab->plt != NULL && htab->plt->size != 0)
11015 {
11016 /* Set .plt entry size. */
11017 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11018 = PLT_ENTRY_SIZE;
11019 }
11020
11021 /* We need to handle writing out multiple GOT sections ourselves,
11022 since we didn't add them to DYNOBJ. We know dynobj is the first
11023 bfd. */
11024 while ((dynobj = dynobj->link_next) != NULL)
11025 {
11026 asection *s;
11027
11028 if (!is_ppc64_elf_target (dynobj->xvec))
11029 continue;
11030
11031 s = ppc64_elf_tdata (dynobj)->got;
11032 if (s != NULL
11033 && s->size != 0
11034 && s->output_section != bfd_abs_section_ptr
11035 && !bfd_set_section_contents (output_bfd, s->output_section,
11036 s->contents, s->output_offset,
11037 s->size))
11038 return FALSE;
11039 s = ppc64_elf_tdata (dynobj)->relgot;
11040 if (s != NULL
11041 && s->size != 0
11042 && s->output_section != bfd_abs_section_ptr
11043 && !bfd_set_section_contents (output_bfd, s->output_section,
11044 s->contents, s->output_offset,
11045 s->size))
11046 return FALSE;
11047 }
11048
11049 return TRUE;
11050 }
11051
11052 #include "elf64-target.h"
GDB Binutils - Deliverables
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