projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Check the correct arch_info object's mach field: all PowerPC machines are
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 /* The 64-bit PowerPC ELF ABI may be found at
24 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
25 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
26
27 #include "bfd.h"
28 #include "sysdep.h"
29 #include "bfdlink.h"
30 #include "libbfd.h"
31 #include "elf-bfd.h"
32 #include "elf/ppc64.h"
33 #include "elf64-ppc.h"
34
35 static bfd_reloc_status_type ppc64_elf_ha_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_toc_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc64_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51
52
53 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
54 #define TARGET_LITTLE_NAME "elf64-powerpcle"
55 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
56 #define TARGET_BIG_NAME "elf64-powerpc"
57 #define ELF_ARCH bfd_arch_powerpc
58 #define ELF_MACHINE_CODE EM_PPC64
59 #define ELF_MAXPAGESIZE 0x10000
60 #define elf_info_to_howto ppc64_elf_info_to_howto
61
62 #define elf_backend_want_got_sym 0
63 #define elf_backend_want_plt_sym 0
64 #define elf_backend_plt_alignment 3
65 #define elf_backend_plt_not_loaded 1
66 #define elf_backend_got_symbol_offset 0
67 #define elf_backend_got_header_size 8
68 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
82 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
83 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
84 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
85 #define elf_backend_check_relocs ppc64_elf_check_relocs
86 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
87 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
88 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
89 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
90 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
91 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
92 #define elf_backend_relocate_section ppc64_elf_relocate_section
93 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
94 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
95 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
96 #define elf_backend_special_sections ppc64_elf_special_sections
97
98 /* The name of the dynamic interpreter. This is put in the .interp
99 section. */
100 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
101
102 /* The size in bytes of an entry in the procedure linkage table. */
103 #define PLT_ENTRY_SIZE 24
104
105 /* The initial size of the plt reserved for the dynamic linker. */
106 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
107
108 /* TOC base pointers offset from start of TOC. */
109 #define TOC_BASE_OFF 0x8000
110
111 /* Offset of tp and dtp pointers from start of TLS block. */
112 #define TP_OFFSET 0x7000
113 #define DTP_OFFSET 0x8000
114
115 /* .plt call stub instructions. The normal stub is like this, but
116 sometimes the .plt entry crosses a 64k boundary and we need to
117 insert an addis to adjust r12. */
118 #define PLT_CALL_STUB_SIZE (7*4)
119 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
120 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
121 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
122 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
123 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
124 /* ld %r11,xxx+16@l(%r12) */
125 #define BCTR 0x4e800420 /* bctr */
126
127
128 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
129 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
130
131 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
132
133 /* glink call stub instructions. We enter with the index in R0, and the
134 address of glink entry in CTR. From that, we can calculate PLT0. */
135 #define GLINK_CALL_STUB_SIZE (16*4)
136 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
137 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
138 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
139 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
140 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
141 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
142 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
143 /* sub %r12,%r12,%r11 */
144 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
145 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
146 /* ld %r11,xxx@l(%r12) */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
148 /* ld %r2,8(%r12) */
149 /* mtctr %r11 */
150 /* ld %r11,16(%r12) */
151 /* bctr */
152
153 /* Pad with this. */
154 #define NOP 0x60000000
155
156 /* Some other nops. */
157 #define CROR_151515 0x4def7b82
158 #define CROR_313131 0x4ffffb82
159
160 /* .glink entries for the first 32k functions are two instructions. */
161 #define LI_R0_0 0x38000000 /* li %r0,0 */
162 #define B_DOT 0x48000000 /* b . */
163
164 /* After that, we need two instructions to load the index, followed by
165 a branch. */
166 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
167 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
168
169 /* Instructions to save and restore floating point regs. */
170 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
171 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
172 #define BLR 0x4e800020 /* blr */
173
174 /* Since .opd is an array of descriptors and each entry will end up
175 with identical R_PPC64_RELATIVE relocs, there is really no need to
176 propagate .opd relocs; The dynamic linker should be taught to
177 relocate .opd without reloc entries. */
178 #ifndef NO_OPD_RELOCS
179 #define NO_OPD_RELOCS 0
180 #endif
181 \f
182 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
183
184 /* Relocation HOWTO's. */
185 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
186
187 static reloc_howto_type ppc64_elf_howto_raw[] = {
188 /* This reloc does nothing. */
189 HOWTO (R_PPC64_NONE, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 32, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_dont, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_PPC64_NONE", /* name */
198 FALSE, /* partial_inplace */
199 0, /* src_mask */
200 0, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 /* A standard 32 bit relocation. */
204 HOWTO (R_PPC64_ADDR32, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 32, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_bitfield, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_PPC64_ADDR32", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 0xffffffff, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* An absolute 26 bit branch; the lower two bits must be zero.
219 FIXME: we don't check that, we just clear them. */
220 HOWTO (R_PPC64_ADDR24, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 26, /* 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_ADDR24", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0x03fffffc, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* A standard 16 bit relocation. */
235 HOWTO (R_PPC64_ADDR16, /* type */
236 0, /* rightshift */
237 1, /* size (0 = byte, 1 = short, 2 = long) */
238 16, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR16", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* A 16 bit relocation without overflow. */
250 HOWTO (R_PPC64_ADDR16_LO, /* type */
251 0, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 16, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont,/* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR16_LO", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0xffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* Bits 16-31 of an address. */
265 HOWTO (R_PPC64_ADDR16_HI, /* type */
266 16, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16_HI", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
280 bits, treated as a signed number, is negative. */
281 HOWTO (R_PPC64_ADDR16_HA, /* 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 ppc64_elf_ha_reloc, /* special_function */
289 "R_PPC64_ADDR16_HA", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* An absolute 16 bit branch; the lower two bits must be zero.
296 FIXME: we don't check that, we just clear them. */
297 HOWTO (R_PPC64_ADDR14, /* type */
298 0, /* rightshift */
299 2, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_bitfield, /* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_PPC64_ADDR14", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0x0000fffc, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch, for which bit 10 should be set to
312 indicate that the branch is expected to be taken. The lower two
313 bits must be zero. */
314 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 ppc64_elf_brtaken_reloc, /* special_function */
322 "R_PPC64_ADDR14_BRTAKEN",/* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0x0000fffc, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch, for which bit 10 should be set to
329 indicate that the branch is not expected to be taken. The lower
330 two bits must be zero. */
331 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
332 0, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 0, /* bitpos */
337 complain_overflow_bitfield, /* complain_on_overflow */
338 ppc64_elf_brtaken_reloc, /* special_function */
339 "R_PPC64_ADDR14_BRNTAKEN",/* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0000fffc, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* A relative 26 bit branch; the lower two bits must be zero. */
346 HOWTO (R_PPC64_REL24, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 26, /* bitsize */
350 TRUE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_signed, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_PPC64_REL24", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x03fffffc, /* dst_mask */
358 TRUE), /* pcrel_offset */
359
360 /* A relative 16 bit branch; the lower two bits must be zero. */
361 HOWTO (R_PPC64_REL14, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 TRUE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* special_function */
369 "R_PPC64_REL14", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 TRUE), /* pcrel_offset */
374
375 /* A relative 16 bit branch. Bit 10 should be set to indicate that
376 the branch is expected to be taken. The lower two bits must be
377 zero. */
378 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 16, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_brtaken_reloc, /* special_function */
386 "R_PPC64_REL14_BRTAKEN", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x0000fffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch. Bit 10 should be set to indicate that
393 the branch is not expected to be taken. The lower two bits must
394 be zero. */
395 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 TRUE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_signed, /* complain_on_overflow */
402 ppc64_elf_brtaken_reloc, /* special_function */
403 "R_PPC64_REL14_BRNTAKEN",/* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0x0000fffc, /* dst_mask */
407 TRUE), /* pcrel_offset */
408
409 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
410 symbol. */
411 HOWTO (R_PPC64_GOT16, /* type */
412 0, /* rightshift */
413 1, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_unhandled_reloc, /* special_function */
419 "R_PPC64_GOT16", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0xffff, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
426 the symbol. */
427 HOWTO (R_PPC64_GOT16_LO, /* 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_dont, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16_LO", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_HI, /* type */
444 16, /* 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_HI", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HA, /* 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_HA", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* This is used only by the dynamic linker. The symbol should exist
474 both in the object being run and in some shared library. The
475 dynamic linker copies the data addressed by the symbol from the
476 shared library into the object, because the object being
477 run has to have the data at some particular address. */
478 HOWTO (R_PPC64_COPY, /* type */
479 0, /* rightshift */
480 0, /* this one is variable size */
481 0, /* bitsize */
482 FALSE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_dont, /* complain_on_overflow */
485 ppc64_elf_unhandled_reloc, /* special_function */
486 "R_PPC64_COPY", /* name */
487 FALSE, /* partial_inplace */
488 0, /* src_mask */
489 0, /* dst_mask */
490 FALSE), /* pcrel_offset */
491
492 /* Like R_PPC64_ADDR64, but used when setting global offset table
493 entries. */
494 HOWTO (R_PPC64_GLOB_DAT, /* type */
495 0, /* rightshift */
496 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
497 64, /* 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_GLOB_DAT", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 ONES (64), /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Created by the link editor. Marks a procedure linkage table
509 entry for a symbol. */
510 HOWTO (R_PPC64_JMP_SLOT, /* type */
511 0, /* rightshift */
512 0, /* size (0 = byte, 1 = short, 2 = long) */
513 0, /* 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_JMP_SLOT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Used only by the dynamic linker. When the object is run, this
525 doubleword64 is set to the load address of the object, plus the
526 addend. */
527 HOWTO (R_PPC64_RELATIVE, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_PPC64_RELATIVE", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Like R_PPC64_ADDR32, but may be unaligned. */
542 HOWTO (R_PPC64_UADDR32, /* type */
543 0, /* rightshift */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
545 32, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_bitfield, /* complain_on_overflow */
549 bfd_elf_generic_reloc, /* special_function */
550 "R_PPC64_UADDR32", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 0xffffffff, /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Like R_PPC64_ADDR16, but may be unaligned. */
557 HOWTO (R_PPC64_UADDR16, /* type */
558 0, /* rightshift */
559 1, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_bitfield, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_UADDR16", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xffff, /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* 32-bit PC relative. */
572 HOWTO (R_PPC64_REL32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 TRUE, /* pc_relative */
577 0, /* bitpos */
578 /* FIXME: Verify. Was complain_overflow_bitfield. */
579 complain_overflow_signed, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_REL32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 TRUE), /* pcrel_offset */
586
587 /* 32-bit relocation to the symbol's procedure linkage table. */
588 HOWTO (R_PPC64_PLT32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 ppc64_elf_unhandled_reloc, /* special_function */
596 "R_PPC64_PLT32", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffffffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
603 FIXME: R_PPC64_PLTREL32 not supported. */
604 HOWTO (R_PPC64_PLTREL32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 TRUE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_signed, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC64_PLTREL32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 TRUE), /* pcrel_offset */
617
618 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
619 the symbol. */
620 HOWTO (R_PPC64_PLT16_LO, /* type */
621 0, /* rightshift */
622 1, /* size (0 = byte, 1 = short, 2 = long) */
623 16, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_dont, /* complain_on_overflow */
627 ppc64_elf_unhandled_reloc, /* special_function */
628 "R_PPC64_PLT16_LO", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_HI, /* type */
637 16, /* 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_HI", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HA, /* 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_HA", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* 16-bit section relative relocation. */
667 HOWTO (R_PPC64_SECTOFF, /* type */
668 0, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_sectoff_reloc, /* special_function */
675 "R_PPC64_SECTOFF", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC64_SECTOFF, but no overflow warning. */
682 HOWTO (R_PPC64_SECTOFF_LO, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_sectoff_reloc, /* special_function */
690 "R_PPC64_SECTOFF_LO", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit upper half section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF_HI, /* type */
698 16, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_dont, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF_HI", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit upper half adjusted section relative relocation. */
712 HOWTO (R_PPC64_SECTOFF_HA, /* type */
713 16, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_ha_reloc, /* special_function */
720 "R_PPC64_SECTOFF_HA", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* Like R_PPC64_REL24 without touching the two least significant bits. */
727 HOWTO (R_PPC64_REL30, /* type */
728 2, /* rightshift */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
730 30, /* bitsize */
731 TRUE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC64_REL30", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xfffffffc, /* dst_mask */
739 TRUE), /* pcrel_offset */
740
741 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
742
743 /* A standard 64-bit relocation. */
744 HOWTO (R_PPC64_ADDR64, /* type */
745 0, /* rightshift */
746 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
747 64, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC64_ADDR64", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 ONES (64), /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* The bits 32-47 of an address. */
759 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
760 32, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_ADDR16_HIGHER", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* The bits 32-47 of an address, plus 1 if the contents of the low
774 16 bits, treated as a signed number, is negative. */
775 HOWTO (R_PPC64_ADDR16_HIGHERA, /* 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 ppc64_elf_ha_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHERA", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 48-63 of an address. */
790 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
791 48, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHEST", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 48-63 of an address, plus 1 if the contents of the low
805 16 bits, treated as a signed number, is negative. */
806 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* 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 ppc64_elf_ha_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHESTA", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* Like ADDR64, but may be unaligned. */
821 HOWTO (R_PPC64_UADDR64, /* type */
822 0, /* rightshift */
823 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
824 64, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_PPC64_UADDR64", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 ONES (64), /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* 64-bit relative relocation. */
836 HOWTO (R_PPC64_REL64, /* type */
837 0, /* rightshift */
838 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
839 64, /* bitsize */
840 TRUE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC64_REL64", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 ONES (64), /* dst_mask */
848 TRUE), /* pcrel_offset */
849
850 /* 64-bit relocation to the symbol's procedure linkage table. */
851 HOWTO (R_PPC64_PLT64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 ppc64_elf_unhandled_reloc, /* special_function */
859 "R_PPC64_PLT64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit PC relative relocation to the symbol's procedure linkage
866 table. */
867 /* FIXME: R_PPC64_PLTREL64 not supported. */
868 HOWTO (R_PPC64_PLTREL64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 TRUE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc64_elf_unhandled_reloc, /* special_function */
876 "R_PPC64_PLTREL64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 TRUE), /* pcrel_offset */
881
882 /* 16 bit TOC-relative relocation. */
883
884 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
885 HOWTO (R_PPC64_TOC16, /* type */
886 0, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_signed, /* complain_on_overflow */
892 ppc64_elf_toc_reloc, /* special_function */
893 "R_PPC64_TOC16", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* 16 bit TOC-relative relocation without overflow. */
900
901 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
902 HOWTO (R_PPC64_TOC16_LO, /* type */
903 0, /* rightshift */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 ppc64_elf_toc_reloc, /* special_function */
910 "R_PPC64_TOC16_LO", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* 16 bit TOC-relative relocation, high 16 bits. */
917
918 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
919 HOWTO (R_PPC64_TOC16_HI, /* type */
920 16, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc64_elf_toc_reloc, /* special_function */
927 "R_PPC64_TOC16_HI", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
934 contents of the low 16 bits, treated as a signed number, is
935 negative. */
936
937 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
938 HOWTO (R_PPC64_TOC16_HA, /* type */
939 16, /* rightshift */
940 1, /* size (0 = byte, 1 = short, 2 = long) */
941 16, /* bitsize */
942 FALSE, /* pc_relative */
943 0, /* bitpos */
944 complain_overflow_dont, /* complain_on_overflow */
945 ppc64_elf_toc_ha_reloc, /* special_function */
946 "R_PPC64_TOC16_HA", /* name */
947 FALSE, /* partial_inplace */
948 0, /* src_mask */
949 0xffff, /* dst_mask */
950 FALSE), /* pcrel_offset */
951
952 /* 64-bit relocation; insert value of TOC base (.TOC.). */
953
954 /* R_PPC64_TOC 51 doubleword64 .TOC. */
955 HOWTO (R_PPC64_TOC, /* type */
956 0, /* rightshift */
957 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
958 64, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_bitfield, /* complain_on_overflow */
962 ppc64_elf_toc64_reloc, /* special_function */
963 "R_PPC64_TOC", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 ONES (64), /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like R_PPC64_GOT16, but also informs the link editor that the
970 value to relocate may (!) refer to a PLT entry which the link
971 editor (a) may replace with the symbol value. If the link editor
972 is unable to fully resolve the symbol, it may (b) create a PLT
973 entry and store the address to the new PLT entry in the GOT.
974 This permits lazy resolution of function symbols at run time.
975 The link editor may also skip all of this and just (c) emit a
976 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
977 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
978 HOWTO (R_PPC64_PLTGOT16, /* type */
979 0, /* rightshift */
980 1, /* size (0 = byte, 1 = short, 2 = long) */
981 16, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_signed, /* complain_on_overflow */
985 ppc64_elf_unhandled_reloc, /* special_function */
986 "R_PPC64_PLTGOT16", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 0xffff, /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* Like R_PPC64_PLTGOT16, but without overflow. */
993 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
994 HOWTO (R_PPC64_PLTGOT16_LO, /* 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_dont, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16_LO", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1009 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1011 16, /* 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_HI", /* 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, plus
1025 1 if the contents of the low 16 bits, treated as a signed number,
1026 is negative. */
1027 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1028 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont,/* complain_on_overflow */
1035 ppc64_elf_unhandled_reloc, /* special_function */
1036 "R_PPC64_PLTGOT16_HA", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1043 HOWTO (R_PPC64_ADDR16_DS, /* type */
1044 0, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_bitfield, /* complain_on_overflow */
1050 bfd_elf_generic_reloc, /* special_function */
1051 "R_PPC64_ADDR16_DS", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xfffc, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1058 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_PPC64_ADDR16_LO_DS",/* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xfffc, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_GOT16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_signed, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_GOT16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc64_elf_unhandled_reloc, /* special_function */
1096 "R_PPC64_GOT16_LO_DS", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_PLT16_LO_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_bitfield, /* complain_on_overflow */
1125 ppc64_elf_sectoff_reloc, /* special_function */
1126 "R_PPC64_SECTOFF_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_sectoff_reloc, /* special_function */
1141 "R_PPC64_SECTOFF_LO_DS",/* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_TOC16_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_signed, /* complain_on_overflow */
1155 ppc64_elf_toc_reloc, /* special_function */
1156 "R_PPC64_TOC16_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_toc_reloc, /* special_function */
1171 "R_PPC64_TOC16_LO_DS", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1178 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1179 HOWTO (R_PPC64_PLTGOT16_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_signed, /* complain_on_overflow */
1186 ppc64_elf_unhandled_reloc, /* special_function */
1187 "R_PPC64_PLTGOT16_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_LO_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_dont, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_LO_DS",/* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Marker reloc for TLS. */
1210 HOWTO (R_PPC64_TLS,
1211 0, /* rightshift */
1212 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 32, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_dont, /* complain_on_overflow */
1217 bfd_elf_generic_reloc, /* special_function */
1218 "R_PPC64_TLS", /* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Computes the load module index of the load module that contains the
1225 definition of its TLS sym. */
1226 HOWTO (R_PPC64_DTPMOD64,
1227 0, /* rightshift */
1228 4, /* size (0 = byte, 1 = short, 2 = long) */
1229 64, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 ppc64_elf_unhandled_reloc, /* special_function */
1234 "R_PPC64_DTPMOD64", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 ONES (64), /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes a dtv-relative displacement, the difference between the value
1241 of sym+add and the base address of the thread-local storage block that
1242 contains the definition of sym, minus 0x8000. */
1243 HOWTO (R_PPC64_DTPREL64,
1244 0, /* rightshift */
1245 4, /* size (0 = byte, 1 = short, 2 = long) */
1246 64, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 ppc64_elf_unhandled_reloc, /* special_function */
1251 "R_PPC64_DTPREL64", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 ONES (64), /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 /* A 16 bit dtprel reloc. */
1258 HOWTO (R_PPC64_DTPREL16,
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_DTPREL16", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xffff, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like DTPREL16, but no overflow. */
1273 HOWTO (R_PPC64_DTPREL16_LO,
1274 0, /* rightshift */
1275 1, /* size (0 = byte, 1 = short, 2 = long) */
1276 16, /* bitsize */
1277 FALSE, /* pc_relative */
1278 0, /* bitpos */
1279 complain_overflow_dont, /* complain_on_overflow */
1280 ppc64_elf_unhandled_reloc, /* special_function */
1281 "R_PPC64_DTPREL16_LO", /* name */
1282 FALSE, /* partial_inplace */
1283 0, /* src_mask */
1284 0xffff, /* dst_mask */
1285 FALSE), /* pcrel_offset */
1286
1287 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1288 HOWTO (R_PPC64_DTPREL16_HI,
1289 16, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc64_elf_unhandled_reloc, /* special_function */
1296 "R_PPC64_DTPREL16_HI", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1303 HOWTO (R_PPC64_DTPREL16_HA,
1304 16, /* rightshift */
1305 1, /* size (0 = byte, 1 = short, 2 = long) */
1306 16, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL16_HA", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0xffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1318 HOWTO (R_PPC64_DTPREL16_HIGHER,
1319 32, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16_HIGHER", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1333 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1334 32, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_HIGHERA", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1349 48, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HIGHEST", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1364 48, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16, but for insns with a DS field. */
1378 HOWTO (R_PPC64_DTPREL16_DS,
1379 0, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_signed, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_DS", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xfffc, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16_DS, but no overflow. */
1393 HOWTO (R_PPC64_DTPREL16_LO_DS,
1394 0, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_dont, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_LO_DS", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xfffc, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Computes a tp-relative displacement, the difference between the value of
1408 sym+add and the value of the thread pointer (r13). */
1409 HOWTO (R_PPC64_TPREL64,
1410 0, /* rightshift */
1411 4, /* size (0 = byte, 1 = short, 2 = long) */
1412 64, /* 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_TPREL64", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 ONES (64), /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* A 16 bit tprel reloc. */
1424 HOWTO (R_PPC64_TPREL16,
1425 0, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_TPREL16", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like TPREL16, but no overflow. */
1439 HOWTO (R_PPC64_TPREL16_LO,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_TPREL16_LO", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like TPREL16_LO, but next higher group of 16 bits. */
1454 HOWTO (R_PPC64_TPREL16_HI,
1455 16, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_TPREL16_HI", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like TPREL16_HI, but adjust for low 16 bits. */
1469 HOWTO (R_PPC64_TPREL16_HA,
1470 16, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL16_HA", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like TPREL16_HI, but next higher group of 16 bits. */
1484 HOWTO (R_PPC64_TPREL16_HIGHER,
1485 32, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16_HIGHER", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1499 HOWTO (R_PPC64_TPREL16_HIGHERA,
1500 32, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_HIGHERA", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HIGHEST,
1515 48, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HIGHEST", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1530 48, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HIGHESTA", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16, but for insns with a DS field. */
1544 HOWTO (R_PPC64_TPREL16_DS,
1545 0, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_signed, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_DS", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xfffc, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16_DS, but no overflow. */
1559 HOWTO (R_PPC64_TPREL16_LO_DS,
1560 0, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_dont, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_LO_DS", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xfffc, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1574 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1575 to the first entry relative to the TOC base (r2). */
1576 HOWTO (R_PPC64_GOT_TLSGD16,
1577 0, /* rightshift */
1578 1, /* size (0 = byte, 1 = short, 2 = long) */
1579 16, /* bitsize */
1580 FALSE, /* pc_relative */
1581 0, /* bitpos */
1582 complain_overflow_signed, /* complain_on_overflow */
1583 ppc64_elf_unhandled_reloc, /* special_function */
1584 "R_PPC64_GOT_TLSGD16", /* name */
1585 FALSE, /* partial_inplace */
1586 0, /* src_mask */
1587 0xffff, /* dst_mask */
1588 FALSE), /* pcrel_offset */
1589
1590 /* Like GOT_TLSGD16, but no overflow. */
1591 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1592 0, /* rightshift */
1593 1, /* size (0 = byte, 1 = short, 2 = long) */
1594 16, /* bitsize */
1595 FALSE, /* pc_relative */
1596 0, /* bitpos */
1597 complain_overflow_dont, /* complain_on_overflow */
1598 ppc64_elf_unhandled_reloc, /* special_function */
1599 "R_PPC64_GOT_TLSGD16_LO", /* name */
1600 FALSE, /* partial_inplace */
1601 0, /* src_mask */
1602 0xffff, /* dst_mask */
1603 FALSE), /* pcrel_offset */
1604
1605 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1606 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1607 16, /* rightshift */
1608 1, /* size (0 = byte, 1 = short, 2 = long) */
1609 16, /* bitsize */
1610 FALSE, /* pc_relative */
1611 0, /* bitpos */
1612 complain_overflow_dont, /* complain_on_overflow */
1613 ppc64_elf_unhandled_reloc, /* special_function */
1614 "R_PPC64_GOT_TLSGD16_HI", /* name */
1615 FALSE, /* partial_inplace */
1616 0, /* src_mask */
1617 0xffff, /* dst_mask */
1618 FALSE), /* pcrel_offset */
1619
1620 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1621 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1622 16, /* rightshift */
1623 1, /* size (0 = byte, 1 = short, 2 = long) */
1624 16, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont, /* complain_on_overflow */
1628 ppc64_elf_unhandled_reloc, /* special_function */
1629 "R_PPC64_GOT_TLSGD16_HA", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0xffff, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1636 with values (sym+add)@dtpmod and zero, and computes the offset to the
1637 first entry relative to the TOC base (r2). */
1638 HOWTO (R_PPC64_GOT_TLSLD16,
1639 0, /* rightshift */
1640 1, /* size (0 = byte, 1 = short, 2 = long) */
1641 16, /* bitsize */
1642 FALSE, /* pc_relative */
1643 0, /* bitpos */
1644 complain_overflow_signed, /* complain_on_overflow */
1645 ppc64_elf_unhandled_reloc, /* special_function */
1646 "R_PPC64_GOT_TLSLD16", /* name */
1647 FALSE, /* partial_inplace */
1648 0, /* src_mask */
1649 0xffff, /* dst_mask */
1650 FALSE), /* pcrel_offset */
1651
1652 /* Like GOT_TLSLD16, but no overflow. */
1653 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1654 0, /* rightshift */
1655 1, /* size (0 = byte, 1 = short, 2 = long) */
1656 16, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_dont, /* complain_on_overflow */
1660 ppc64_elf_unhandled_reloc, /* special_function */
1661 "R_PPC64_GOT_TLSLD16_LO", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0xffff, /* dst_mask */
1665 FALSE), /* pcrel_offset */
1666
1667 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1668 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1669 16, /* rightshift */
1670 1, /* size (0 = byte, 1 = short, 2 = long) */
1671 16, /* bitsize */
1672 FALSE, /* pc_relative */
1673 0, /* bitpos */
1674 complain_overflow_dont, /* complain_on_overflow */
1675 ppc64_elf_unhandled_reloc, /* special_function */
1676 "R_PPC64_GOT_TLSLD16_HI", /* name */
1677 FALSE, /* partial_inplace */
1678 0, /* src_mask */
1679 0xffff, /* dst_mask */
1680 FALSE), /* pcrel_offset */
1681
1682 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1683 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1684 16, /* rightshift */
1685 1, /* size (0 = byte, 1 = short, 2 = long) */
1686 16, /* bitsize */
1687 FALSE, /* pc_relative */
1688 0, /* bitpos */
1689 complain_overflow_dont, /* complain_on_overflow */
1690 ppc64_elf_unhandled_reloc, /* special_function */
1691 "R_PPC64_GOT_TLSLD16_HA", /* name */
1692 FALSE, /* partial_inplace */
1693 0, /* src_mask */
1694 0xffff, /* dst_mask */
1695 FALSE), /* pcrel_offset */
1696
1697 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1698 the offset to the entry relative to the TOC base (r2). */
1699 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1700 0, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_signed, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_DTPREL16_DS", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xfffc, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Like GOT_DTPREL16_DS, but no overflow. */
1714 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_dont, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xfffc, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1729 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1730 16, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_DTPREL16_HI", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xffff, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1744 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_DTPREL16_HA", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1759 offset to the entry relative to the TOC base (r2). */
1760 HOWTO (R_PPC64_GOT_TPREL16_DS,
1761 0, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_signed, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_TPREL16_DS", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xfffc, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Like GOT_TPREL16_DS, but no overflow. */
1775 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_dont, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1790 HOWTO (R_PPC64_GOT_TPREL16_HI,
1791 16, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_TPREL16_HI", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xffff, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1805 HOWTO (R_PPC64_GOT_TPREL16_HA,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_TPREL16_HA", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* GNU extension to record C++ vtable hierarchy. */
1820 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1821 0, /* rightshift */
1822 0, /* size (0 = byte, 1 = short, 2 = long) */
1823 0, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_dont, /* complain_on_overflow */
1827 NULL, /* special_function */
1828 "R_PPC64_GNU_VTINHERIT", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* GNU extension to record C++ vtable member usage. */
1835 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1836 0, /* rightshift */
1837 0, /* size (0 = byte, 1 = short, 2 = long) */
1838 0, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 NULL, /* special_function */
1843 "R_PPC64_GNU_VTENTRY", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848 };
1849
1850 \f
1851 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1852 be done. */
1853
1854 static void
1855 ppc_howto_init (void)
1856 {
1857 unsigned int i, type;
1858
1859 for (i = 0;
1860 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1861 i++)
1862 {
1863 type = ppc64_elf_howto_raw[i].type;
1864 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1865 / sizeof (ppc64_elf_howto_table[0])));
1866 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1867 }
1868 }
1869
1870 static reloc_howto_type *
1871 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1872 bfd_reloc_code_real_type code)
1873 {
1874 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1875
1876 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1877 /* Initialize howto table if needed. */
1878 ppc_howto_init ();
1879
1880 switch (code)
1881 {
1882 default:
1883 return NULL;
1884
1885 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1886 break;
1887 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1888 break;
1889 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1890 break;
1891 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1892 break;
1893 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1894 break;
1895 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1896 break;
1897 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1898 break;
1899 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1900 break;
1901 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1902 break;
1903 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1904 break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1906 break;
1907 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1908 break;
1909 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1910 break;
1911 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1912 break;
1913 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1914 break;
1915 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1916 break;
1917 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1918 break;
1919 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1920 break;
1921 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1922 break;
1923 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1924 break;
1925 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1926 break;
1927 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1928 break;
1929 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1930 break;
1931 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1936 break;
1937 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1938 break;
1939 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1940 break;
1941 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1942 break;
1943 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1944 break;
1945 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1946 break;
1947 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1948 break;
1949 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1954 break;
1955 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1956 break;
1957 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1958 break;
1959 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1960 break;
1961 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1962 break;
1963 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1964 break;
1965 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1968 break;
1969 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1970 break;
1971 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1972 break;
1973 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1978 break;
1979 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1980 break;
1981 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1982 break;
1983 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1984 break;
1985 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1986 break;
1987 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1988 break;
1989 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1990 break;
1991 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1992 break;
1993 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1998 break;
1999 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2002 break;
2003 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2004 break;
2005 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2006 break;
2007 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2012 break;
2013 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2014 break;
2015 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2016 break;
2017 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2026 break;
2027 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2058 break;
2059 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2070 break;
2071 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2082 break;
2083 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2084 break;
2085 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2086 break;
2087 }
2088
2089 return ppc64_elf_howto_table[r];
2090 };
2091
2092 /* Set the howto pointer for a PowerPC ELF reloc. */
2093
2094 static void
2095 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2096 Elf_Internal_Rela *dst)
2097 {
2098 unsigned int type;
2099
2100 /* Initialize howto table if needed. */
2101 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2102 ppc_howto_init ();
2103
2104 type = ELF64_R_TYPE (dst->r_info);
2105 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2106 / sizeof (ppc64_elf_howto_table[0])));
2107 cache_ptr->howto = ppc64_elf_howto_table[type];
2108 }
2109
2110 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2111
2112 static bfd_reloc_status_type
2113 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2114 void *data, asection *input_section,
2115 bfd *output_bfd, char **error_message)
2116 {
2117 /* If this is a relocatable link (output_bfd test tells us), just
2118 call the generic function. Any adjustment will be done at final
2119 link time. */
2120 if (output_bfd != NULL)
2121 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2122 input_section, output_bfd, error_message);
2123
2124 /* Adjust the addend for sign extension of the low 16 bits.
2125 We won't actually be using the low 16 bits, so trashing them
2126 doesn't matter. */
2127 reloc_entry->addend += 0x8000;
2128 return bfd_reloc_continue;
2129 }
2130
2131 static bfd_reloc_status_type
2132 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2133 void *data, asection *input_section,
2134 bfd *output_bfd, char **error_message)
2135 {
2136 long insn;
2137 enum elf_ppc64_reloc_type r_type;
2138 bfd_size_type octets;
2139 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2140 bfd_boolean is_power4 = FALSE;
2141
2142 /* If this is a relocatable link (output_bfd test tells us), just
2143 call the generic function. Any adjustment will be done at final
2144 link time. */
2145 if (output_bfd != NULL)
2146 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2147 input_section, output_bfd, error_message);
2148
2149 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2150 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2151 insn &= ~(0x01 << 21);
2152 r_type = reloc_entry->howto->type;
2153 if (r_type == R_PPC64_ADDR14_BRTAKEN
2154 || r_type == R_PPC64_REL14_BRTAKEN)
2155 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2156
2157 if (is_power4)
2158 {
2159 /* Set 'a' bit. This is 0b00010 in BO field for branch
2160 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2161 for branch on CTR insns (BO == 1a00t or 1a01t). */
2162 if ((insn & (0x14 << 21)) == (0x04 << 21))
2163 insn |= 0x02 << 21;
2164 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2165 insn |= 0x08 << 21;
2166 else
2167 return bfd_reloc_continue;
2168 }
2169 else
2170 {
2171 bfd_vma target = 0;
2172 bfd_vma from;
2173
2174 if (!bfd_is_com_section (symbol->section))
2175 target = symbol->value;
2176 target += symbol->section->output_section->vma;
2177 target += symbol->section->output_offset;
2178 target += reloc_entry->addend;
2179
2180 from = (reloc_entry->address
2181 + input_section->output_offset
2182 + input_section->output_section->vma);
2183
2184 /* Invert 'y' bit if not the default. */
2185 if ((bfd_signed_vma) (target - from) < 0)
2186 insn ^= 0x01 << 21;
2187 }
2188 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2189 return bfd_reloc_continue;
2190 }
2191
2192 static bfd_reloc_status_type
2193 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2194 void *data, asection *input_section,
2195 bfd *output_bfd, char **error_message)
2196 {
2197 /* If this is a relocatable link (output_bfd test tells us), just
2198 call the generic function. Any adjustment will be done at final
2199 link time. */
2200 if (output_bfd != NULL)
2201 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2202 input_section, output_bfd, error_message);
2203
2204 /* Subtract the symbol section base address. */
2205 reloc_entry->addend -= symbol->section->output_section->vma;
2206 return bfd_reloc_continue;
2207 }
2208
2209 static bfd_reloc_status_type
2210 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2211 void *data, asection *input_section,
2212 bfd *output_bfd, char **error_message)
2213 {
2214 /* If this is a relocatable link (output_bfd test tells us), just
2215 call the generic function. Any adjustment will be done at final
2216 link time. */
2217 if (output_bfd != NULL)
2218 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2219 input_section, output_bfd, error_message);
2220
2221 /* Subtract the symbol section base address. */
2222 reloc_entry->addend -= symbol->section->output_section->vma;
2223
2224 /* Adjust the addend for sign extension of the low 16 bits. */
2225 reloc_entry->addend += 0x8000;
2226 return bfd_reloc_continue;
2227 }
2228
2229 static bfd_reloc_status_type
2230 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2231 void *data, asection *input_section,
2232 bfd *output_bfd, char **error_message)
2233 {
2234 bfd_vma TOCstart;
2235
2236 /* If this is a relocatable link (output_bfd test tells us), just
2237 call the generic function. Any adjustment will be done at final
2238 link time. */
2239 if (output_bfd != NULL)
2240 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2241 input_section, output_bfd, error_message);
2242
2243 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2244 if (TOCstart == 0)
2245 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2246
2247 /* Subtract the TOC base address. */
2248 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2249 return bfd_reloc_continue;
2250 }
2251
2252 static bfd_reloc_status_type
2253 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2254 void *data, asection *input_section,
2255 bfd *output_bfd, char **error_message)
2256 {
2257 bfd_vma TOCstart;
2258
2259 /* If this is a relocatable link (output_bfd test tells us), just
2260 call the generic function. Any adjustment will be done at final
2261 link time. */
2262 if (output_bfd != NULL)
2263 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265
2266 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2267 if (TOCstart == 0)
2268 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2269
2270 /* Subtract the TOC base address. */
2271 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2272
2273 /* Adjust the addend for sign extension of the low 16 bits. */
2274 reloc_entry->addend += 0x8000;
2275 return bfd_reloc_continue;
2276 }
2277
2278 static bfd_reloc_status_type
2279 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2280 void *data, asection *input_section,
2281 bfd *output_bfd, char **error_message)
2282 {
2283 bfd_vma TOCstart;
2284 bfd_size_type octets;
2285
2286 /* If this is a relocatable link (output_bfd test tells us), just
2287 call the generic function. Any adjustment will be done at final
2288 link time. */
2289 if (output_bfd != NULL)
2290 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2291 input_section, output_bfd, error_message);
2292
2293 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2294 if (TOCstart == 0)
2295 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2296
2297 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2298 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2299 return bfd_reloc_ok;
2300 }
2301
2302 static bfd_reloc_status_type
2303 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2304 void *data, asection *input_section,
2305 bfd *output_bfd, char **error_message)
2306 {
2307 /* If this is a relocatable link (output_bfd test tells us), just
2308 call the generic function. Any adjustment will be done at final
2309 link time. */
2310 if (output_bfd != NULL)
2311 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2312 input_section, output_bfd, error_message);
2313
2314 if (error_message != NULL)
2315 {
2316 static char buf[60];
2317 sprintf (buf, "generic linker can't handle %s",
2318 reloc_entry->howto->name);
2319 *error_message = buf;
2320 }
2321 return bfd_reloc_dangerous;
2322 }
2323
2324 struct ppc64_elf_obj_tdata
2325 {
2326 struct elf_obj_tdata elf;
2327
2328 /* Shortcuts to dynamic linker sections. */
2329 asection *got;
2330 asection *relgot;
2331
2332 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2333 sections means we potentially need one of these for each input bfd. */
2334 union {
2335 bfd_signed_vma refcount;
2336 bfd_vma offset;
2337 } tlsld_got;
2338 };
2339
2340 #define ppc64_elf_tdata(bfd) \
2341 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2342
2343 #define ppc64_tlsld_got(bfd) \
2344 (&ppc64_elf_tdata (bfd)->tlsld_got)
2345
2346 /* Override the generic function because we store some extras. */
2347
2348 static bfd_boolean
2349 ppc64_elf_mkobject (bfd *abfd)
2350 {
2351 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2352 abfd->tdata.any = bfd_zalloc (abfd, amt);
2353 if (abfd->tdata.any == NULL)
2354 return FALSE;
2355 return TRUE;
2356 }
2357
2358 /* Fix bad default arch selected for a 64 bit input bfd when the
2359 default is 32 bit. */
2360
2361 static bfd_boolean
2362 ppc64_elf_object_p (bfd *abfd)
2363 {
2364 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2365 {
2366 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2367
2368 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2369 {
2370 /* Relies on arch after 32 bit default being 64 bit default. */
2371 abfd->arch_info = abfd->arch_info->next;
2372 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2373 }
2374 }
2375 return TRUE;
2376 }
2377
2378 /* Support for core dump NOTE sections. */
2379
2380 static bfd_boolean
2381 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2382 {
2383 size_t offset, raw_size;
2384
2385 if (note->descsz != 504)
2386 return FALSE;
2387
2388 /* pr_cursig */
2389 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2390
2391 /* pr_pid */
2392 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2393
2394 /* pr_reg */
2395 offset = 112;
2396 raw_size = 384;
2397
2398 /* Make a ".reg/999" section. */
2399 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2400 raw_size, note->descpos + offset);
2401 }
2402
2403 static bfd_boolean
2404 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2405 {
2406 if (note->descsz != 136)
2407 return FALSE;
2408
2409 elf_tdata (abfd)->core_program
2410 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2411 elf_tdata (abfd)->core_command
2412 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2413
2414 return TRUE;
2415 }
2416
2417 /* Merge backend specific data from an object file to the output
2418 object file when linking. */
2419
2420 static bfd_boolean
2421 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2422 {
2423 /* Check if we have the same endianess. */
2424 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2425 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2426 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2427 {
2428 const char *msg;
2429
2430 if (bfd_big_endian (ibfd))
2431 msg = _("%s: compiled for a big endian system "
2432 "and target is little endian");
2433 else
2434 msg = _("%s: compiled for a little endian system "
2435 "and target is big endian");
2436
2437 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2438
2439 bfd_set_error (bfd_error_wrong_format);
2440 return FALSE;
2441 }
2442
2443 return TRUE;
2444 }
2445
2446 /* Add extra PPC sections. */
2447
2448 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2449 {
2450 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2451 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2452 { ".plt", 4, 0, SHT_NOBITS, 0 },
2453 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2455 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2456 { NULL, 0, 0, 0, 0 }
2457 };
2458
2459 struct _ppc64_elf_section_data
2460 {
2461 struct bfd_elf_section_data elf;
2462
2463 /* An array with one entry for each opd function descriptor. */
2464 union
2465 {
2466 /* Points to the function code section for local opd entries. */
2467 asection **func_sec;
2468 /* After editing .opd, adjust references to opd local syms. */
2469 long *adjust;
2470 } opd;
2471
2472 /* An array for toc sections, indexed by offset/8.
2473 Specifies the relocation symbol index used at a given toc offset. */
2474 unsigned *t_symndx;
2475 };
2476
2477 #define ppc64_elf_section_data(sec) \
2478 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2479
2480 static bfd_boolean
2481 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2482 {
2483 struct _ppc64_elf_section_data *sdata;
2484 bfd_size_type amt = sizeof (*sdata);
2485
2486 sdata = bfd_zalloc (abfd, amt);
2487 if (sdata == NULL)
2488 return FALSE;
2489 sec->used_by_bfd = sdata;
2490
2491 return _bfd_elf_new_section_hook (abfd, sec);
2492 }
2493 \f
2494 /* The following functions are specific to the ELF linker, while
2495 functions above are used generally. Those named ppc64_elf_* are
2496 called by the main ELF linker code. They appear in this file more
2497 or less in the order in which they are called. eg.
2498 ppc64_elf_check_relocs is called early in the link process,
2499 ppc64_elf_finish_dynamic_sections is one of the last functions
2500 called.
2501
2502 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2503 functions have both a function code symbol and a function descriptor
2504 symbol. A call to foo in a relocatable object file looks like:
2505
2506 . .text
2507 . x:
2508 . bl .foo
2509 . nop
2510
2511 The function definition in another object file might be:
2512
2513 . .section .opd
2514 . foo: .quad .foo
2515 . .quad .TOC.@tocbase
2516 . .quad 0
2517 .
2518 . .text
2519 . .foo: blr
2520
2521 When the linker resolves the call during a static link, the branch
2522 unsurprisingly just goes to .foo and the .opd information is unused.
2523 If the function definition is in a shared library, things are a little
2524 different: The call goes via a plt call stub, the opd information gets
2525 copied to the plt, and the linker patches the nop.
2526
2527 . x:
2528 . bl .foo_stub
2529 . ld 2,40(1)
2530 .
2531 .
2532 . .foo_stub:
2533 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2534 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2535 . std 2,40(1) # this is the general idea
2536 . ld 11,0(12)
2537 . ld 2,8(12)
2538 . mtctr 11
2539 . ld 11,16(12)
2540 . bctr
2541 .
2542 . .section .plt
2543 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2544
2545 The "reloc ()" notation is supposed to indicate that the linker emits
2546 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2547 copying.
2548
2549 What are the difficulties here? Well, firstly, the relocations
2550 examined by the linker in check_relocs are against the function code
2551 sym .foo, while the dynamic relocation in the plt is emitted against
2552 the function descriptor symbol, foo. Somewhere along the line, we need
2553 to carefully copy dynamic link information from one symbol to the other.
2554 Secondly, the generic part of the elf linker will make .foo a dynamic
2555 symbol as is normal for most other backends. We need foo dynamic
2556 instead, at least for an application final link. However, when
2557 creating a shared library containing foo, we need to have both symbols
2558 dynamic so that references to .foo are satisfied during the early
2559 stages of linking. Otherwise the linker might decide to pull in a
2560 definition from some other object, eg. a static library. */
2561
2562 /* The linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_dyn_relocs
2569 {
2570 struct ppc_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track GOT entries needed for a given symbol. We might need more
2583 than one got entry per symbol. */
2584 struct got_entry
2585 {
2586 struct got_entry *next;
2587
2588 /* The symbol addend that we'll be placing in the GOT. */
2589 bfd_vma addend;
2590
2591 /* Unlike other ELF targets, we use separate GOT entries for the same
2592 symbol referenced from different input files. This is to support
2593 automatic multiple TOC/GOT sections, where the TOC base can vary
2594 from one input file to another.
2595
2596 Point to the BFD owning this GOT entry. */
2597 bfd *owner;
2598
2599 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2600 TLS_TPREL or TLS_DTPREL for tls entries. */
2601 char tls_type;
2602
2603 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2604 union
2605 {
2606 bfd_signed_vma refcount;
2607 bfd_vma offset;
2608 } got;
2609 };
2610
2611 /* The same for PLT. */
2612 struct plt_entry
2613 {
2614 struct plt_entry *next;
2615
2616 bfd_vma addend;
2617
2618 union
2619 {
2620 bfd_signed_vma refcount;
2621 bfd_vma offset;
2622 } plt;
2623 };
2624
2625 /* Of those relocs that might be copied as dynamic relocs, this macro
2626 selects those that must be copied when linking a shared library,
2627 even when the symbol is local. */
2628
2629 #define MUST_BE_DYN_RELOC(RTYPE) \
2630 ((RTYPE) != R_PPC64_REL32 \
2631 && (RTYPE) != R_PPC64_REL64 \
2632 && (RTYPE) != R_PPC64_REL30)
2633
2634 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2635 copying dynamic variables from a shared lib into an app's dynbss
2636 section, and instead use a dynamic relocation to point into the
2637 shared lib. With code that gcc generates, it's vital that this be
2638 enabled; In the PowerPC64 ABI, the address of a function is actually
2639 the address of a function descriptor, which resides in the .opd
2640 section. gcc uses the descriptor directly rather than going via the
2641 GOT as some other ABI's do, which means that initialized function
2642 pointers must reference the descriptor. Thus, a function pointer
2643 initialized to the address of a function in a shared library will
2644 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2645 redefines the function desctriptor symbol to point to the copy. This
2646 presents a problem as a plt entry for that function is also
2647 initialized from the function descriptor symbol and the copy reloc
2648 may not be initialized first. */
2649 #define ELIMINATE_COPY_RELOCS 1
2650
2651 /* Section name for stubs is the associated section name plus this
2652 string. */
2653 #define STUB_SUFFIX ".stub"
2654
2655 /* Linker stubs.
2656 ppc_stub_long_branch:
2657 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2658 destination, but a 24 bit branch in a stub section will reach.
2659 . b dest
2660
2661 ppc_stub_plt_branch:
2662 Similar to the above, but a 24 bit branch in the stub section won't
2663 reach its destination.
2664 . addis %r12,%r2,xxx@toc@ha
2665 . ld %r11,xxx@toc@l(%r12)
2666 . mtctr %r11
2667 . bctr
2668
2669 ppc_stub_plt_call:
2670 Used to call a function in a shared library.
2671 . addis %r12,%r2,xxx@toc@ha
2672 . std %r2,40(%r1)
2673 . ld %r11,xxx+0@toc@l(%r12)
2674 . ld %r2,xxx+8@toc@l(%r12)
2675 . mtctr %r11
2676 . ld %r11,xxx+16@toc@l(%r12)
2677 . bctr
2678
2679 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2680 code to adjust the value and save r2 to support multiple toc sections.
2681 A ppc_stub_long_branch with an r2 offset looks like:
2682 . std %r2,40(%r1)
2683 . addis %r2,%r2,off@ha
2684 . addi %r2,%r2,off@l
2685 . b dest
2686
2687 A ppc_stub_plt_branch with an r2 offset looks like:
2688 . std %r2,40(%r1)
2689 . addis %r12,%r2,xxx@toc@ha
2690 . ld %r11,xxx@toc@l(%r12)
2691 . addis %r2,%r2,off@ha
2692 . addi %r2,%r2,off@l
2693 . mtctr %r11
2694 . bctr
2695 */
2696
2697 enum ppc_stub_type {
2698 ppc_stub_none,
2699 ppc_stub_long_branch,
2700 ppc_stub_long_branch_r2off,
2701 ppc_stub_plt_branch,
2702 ppc_stub_plt_branch_r2off,
2703 ppc_stub_plt_call
2704 };
2705
2706 struct ppc_stub_hash_entry {
2707
2708 /* Base hash table entry structure. */
2709 struct bfd_hash_entry root;
2710
2711 enum ppc_stub_type stub_type;
2712
2713 /* The stub section. */
2714 asection *stub_sec;
2715
2716 /* Offset within stub_sec of the beginning of this stub. */
2717 bfd_vma stub_offset;
2718
2719 /* Given the symbol's value and its section we can determine its final
2720 value when building the stubs (so the stub knows where to jump. */
2721 bfd_vma target_value;
2722 asection *target_section;
2723
2724 /* The symbol table entry, if any, that this was derived from. */
2725 struct ppc_link_hash_entry *h;
2726
2727 /* And the reloc addend that this was derived from. */
2728 bfd_vma addend;
2729
2730 /* Where this stub is being called from, or, in the case of combined
2731 stub sections, the first input section in the group. */
2732 asection *id_sec;
2733 };
2734
2735 struct ppc_branch_hash_entry {
2736
2737 /* Base hash table entry structure. */
2738 struct bfd_hash_entry root;
2739
2740 /* Offset within .branch_lt. */
2741 unsigned int offset;
2742
2743 /* Generation marker. */
2744 unsigned int iter;
2745 };
2746
2747 struct ppc_link_hash_entry
2748 {
2749 struct elf_link_hash_entry elf;
2750
2751 /* A pointer to the most recently used stub hash entry against this
2752 symbol. */
2753 struct ppc_stub_hash_entry *stub_cache;
2754
2755 /* Track dynamic relocs copied for this symbol. */
2756 struct ppc_dyn_relocs *dyn_relocs;
2757
2758 /* Link between function code and descriptor symbols. */
2759 struct elf_link_hash_entry *oh;
2760
2761 /* Flag function code and descriptor symbols. */
2762 unsigned int is_func:1;
2763 unsigned int is_func_descriptor:1;
2764 unsigned int is_entry:1;
2765
2766 /* Contexts in which symbol is used in the GOT (or TOC).
2767 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2768 corresponding relocs are encountered during check_relocs.
2769 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2770 indicate the corresponding GOT entry type is not needed.
2771 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2772 a TPREL one. We use a separate flag rather than setting TPREL
2773 just for convenience in distinguishing the two cases. */
2774 #define TLS_GD 1 /* GD reloc. */
2775 #define TLS_LD 2 /* LD reloc. */
2776 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2777 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2778 #define TLS_TLS 16 /* Any TLS reloc. */
2779 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2780 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2781 char tls_mask;
2782 };
2783
2784 /* ppc64 ELF linker hash table. */
2785
2786 struct ppc_link_hash_table
2787 {
2788 struct elf_link_hash_table elf;
2789
2790 /* The stub hash table. */
2791 struct bfd_hash_table stub_hash_table;
2792
2793 /* Another hash table for plt_branch stubs. */
2794 struct bfd_hash_table branch_hash_table;
2795
2796 /* Linker stub bfd. */
2797 bfd *stub_bfd;
2798
2799 /* Linker call-backs. */
2800 asection * (*add_stub_section) (const char *, asection *);
2801 void (*layout_sections_again) (void);
2802
2803 /* Array to keep track of which stub sections have been created, and
2804 information on stub grouping. */
2805 struct map_stub {
2806 /* This is the section to which stubs in the group will be attached. */
2807 asection *link_sec;
2808 /* The stub section. */
2809 asection *stub_sec;
2810 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2811 bfd_vma toc_off;
2812 } *stub_group;
2813
2814 /* Support for multiple toc sections. */
2815 unsigned int no_multi_toc;
2816 unsigned int multi_toc_needed;
2817
2818 /* Temp used when calculating TOC pointers. */
2819 bfd_vma toc_curr;
2820
2821 /* Highest input section id. */
2822 int top_id;
2823
2824 /* Highest output section index. */
2825 int top_index;
2826
2827 /* List of input sections for each output section. */
2828 asection **input_list;
2829
2830 /* Short-cuts to get to dynamic linker sections. */
2831 asection *got;
2832 asection *plt;
2833 asection *relplt;
2834 asection *dynbss;
2835 asection *relbss;
2836 asection *glink;
2837 asection *sfpr;
2838 asection *brlt;
2839 asection *relbrlt;
2840
2841 /* Short-cut to first output tls section. */
2842 asection *tls_sec;
2843
2844 /* Shortcut to .__tls_get_addr. */
2845 struct elf_link_hash_entry *tls_get_addr;
2846
2847 /* Statistics. */
2848 unsigned long stub_count[ppc_stub_plt_call];
2849
2850 /* Set if we should emit symbols for stubs. */
2851 unsigned int emit_stub_syms;
2852
2853 /* Set on error. */
2854 unsigned int stub_error;
2855
2856 /* Flag set when small branches are detected. Used to
2857 select suitable defaults for the stub group size. */
2858 unsigned int has_14bit_branch;
2859
2860 /* Set if we detect a reference undefined weak symbol. */
2861 unsigned int have_undefweak;
2862
2863 /* Incremented every time we size stubs. */
2864 unsigned int stub_iteration;
2865
2866 /* Small local sym to section mapping cache. */
2867 struct sym_sec_cache sym_sec;
2868 };
2869
2870 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2871
2872 #define ppc_hash_table(p) \
2873 ((struct ppc_link_hash_table *) ((p)->hash))
2874
2875 #define ppc_stub_hash_lookup(table, string, create, copy) \
2876 ((struct ppc_stub_hash_entry *) \
2877 bfd_hash_lookup ((table), (string), (create), (copy)))
2878
2879 #define ppc_branch_hash_lookup(table, string, create, copy) \
2880 ((struct ppc_branch_hash_entry *) \
2881 bfd_hash_lookup ((table), (string), (create), (copy)))
2882
2883 /* Create an entry in the stub hash table. */
2884
2885 static struct bfd_hash_entry *
2886 stub_hash_newfunc (struct bfd_hash_entry *entry,
2887 struct bfd_hash_table *table,
2888 const char *string)
2889 {
2890 /* Allocate the structure if it has not already been allocated by a
2891 subclass. */
2892 if (entry == NULL)
2893 {
2894 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2895 if (entry == NULL)
2896 return entry;
2897 }
2898
2899 /* Call the allocation method of the superclass. */
2900 entry = bfd_hash_newfunc (entry, table, string);
2901 if (entry != NULL)
2902 {
2903 struct ppc_stub_hash_entry *eh;
2904
2905 /* Initialize the local fields. */
2906 eh = (struct ppc_stub_hash_entry *) entry;
2907 eh->stub_type = ppc_stub_none;
2908 eh->stub_sec = NULL;
2909 eh->stub_offset = 0;
2910 eh->target_value = 0;
2911 eh->target_section = NULL;
2912 eh->h = NULL;
2913 eh->id_sec = NULL;
2914 }
2915
2916 return entry;
2917 }
2918
2919 /* Create an entry in the branch hash table. */
2920
2921 static struct bfd_hash_entry *
2922 branch_hash_newfunc (struct bfd_hash_entry *entry,
2923 struct bfd_hash_table *table,
2924 const char *string)
2925 {
2926 /* Allocate the structure if it has not already been allocated by a
2927 subclass. */
2928 if (entry == NULL)
2929 {
2930 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2931 if (entry == NULL)
2932 return entry;
2933 }
2934
2935 /* Call the allocation method of the superclass. */
2936 entry = bfd_hash_newfunc (entry, table, string);
2937 if (entry != NULL)
2938 {
2939 struct ppc_branch_hash_entry *eh;
2940
2941 /* Initialize the local fields. */
2942 eh = (struct ppc_branch_hash_entry *) entry;
2943 eh->offset = 0;
2944 eh->iter = 0;
2945 }
2946
2947 return entry;
2948 }
2949
2950 /* Create an entry in a ppc64 ELF linker hash table. */
2951
2952 static struct bfd_hash_entry *
2953 link_hash_newfunc (struct bfd_hash_entry *entry,
2954 struct bfd_hash_table *table,
2955 const char *string)
2956 {
2957 /* Allocate the structure if it has not already been allocated by a
2958 subclass. */
2959 if (entry == NULL)
2960 {
2961 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2962 if (entry == NULL)
2963 return entry;
2964 }
2965
2966 /* Call the allocation method of the superclass. */
2967 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2968 if (entry != NULL)
2969 {
2970 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2971
2972 eh->stub_cache = NULL;
2973 eh->dyn_relocs = NULL;
2974 eh->oh = NULL;
2975 eh->is_func = 0;
2976 eh->is_func_descriptor = 0;
2977 eh->is_entry = 0;
2978 eh->tls_mask = 0;
2979 }
2980
2981 return entry;
2982 }
2983
2984 /* Create a ppc64 ELF linker hash table. */
2985
2986 static struct bfd_link_hash_table *
2987 ppc64_elf_link_hash_table_create (bfd *abfd)
2988 {
2989 struct ppc_link_hash_table *htab;
2990 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2991
2992 htab = bfd_zmalloc (amt);
2993 if (htab == NULL)
2994 return NULL;
2995
2996 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2997 {
2998 free (htab);
2999 return NULL;
3000 }
3001
3002 /* Init the stub hash table too. */
3003 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3004 return NULL;
3005
3006 /* And the branch hash table. */
3007 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3008 return NULL;
3009
3010 /* Initializing two fields of the union is just cosmetic. We really
3011 only care about glist, but when compiled on a 32-bit host the
3012 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3013 debugger inspection of these fields look nicer. */
3014 htab->elf.init_refcount.refcount = 0;
3015 htab->elf.init_refcount.glist = NULL;
3016 htab->elf.init_offset.offset = 0;
3017 htab->elf.init_offset.glist = NULL;
3018
3019 return &htab->elf.root;
3020 }
3021
3022 /* Free the derived linker hash table. */
3023
3024 static void
3025 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3026 {
3027 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3028
3029 bfd_hash_table_free (&ret->stub_hash_table);
3030 bfd_hash_table_free (&ret->branch_hash_table);
3031 _bfd_generic_link_hash_table_free (hash);
3032 }
3033
3034 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3035
3036 void
3037 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3038 {
3039 struct ppc_link_hash_table *htab;
3040
3041 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3042
3043 /* Always hook our dynamic sections into the first bfd, which is the
3044 linker created stub bfd. This ensures that the GOT header is at
3045 the start of the output TOC section. */
3046 htab = ppc_hash_table (info);
3047 htab->stub_bfd = abfd;
3048 htab->elf.dynobj = abfd;
3049 }
3050
3051 /* Build a name for an entry in the stub hash table. */
3052
3053 static char *
3054 ppc_stub_name (const asection *input_section,
3055 const asection *sym_sec,
3056 const struct ppc_link_hash_entry *h,
3057 const Elf_Internal_Rela *rel)
3058 {
3059 char *stub_name;
3060 bfd_size_type len;
3061
3062 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3063 offsets from a sym as a branch target? In fact, we could
3064 probably assume the addend is always zero. */
3065 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3066
3067 if (h)
3068 {
3069 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3070 stub_name = bfd_malloc (len);
3071 if (stub_name != NULL)
3072 {
3073 sprintf (stub_name, "%08x.%s+%x",
3074 input_section->id & 0xffffffff,
3075 h->elf.root.root.string,
3076 (int) rel->r_addend & 0xffffffff);
3077 }
3078 }
3079 else
3080 {
3081 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3082 stub_name = bfd_malloc (len);
3083 if (stub_name != NULL)
3084 {
3085 sprintf (stub_name, "%08x.%x:%x+%x",
3086 input_section->id & 0xffffffff,
3087 sym_sec->id & 0xffffffff,
3088 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3089 (int) rel->r_addend & 0xffffffff);
3090 }
3091 }
3092 return stub_name;
3093 }
3094
3095 /* Look up an entry in the stub hash. Stub entries are cached because
3096 creating the stub name takes a bit of time. */
3097
3098 static struct ppc_stub_hash_entry *
3099 ppc_get_stub_entry (const asection *input_section,
3100 const asection *sym_sec,
3101 struct elf_link_hash_entry *hash,
3102 const Elf_Internal_Rela *rel,
3103 struct ppc_link_hash_table *htab)
3104 {
3105 struct ppc_stub_hash_entry *stub_entry;
3106 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3107 const asection *id_sec;
3108
3109 /* If this input section is part of a group of sections sharing one
3110 stub section, then use the id of the first section in the group.
3111 Stub names need to include a section id, as there may well be
3112 more than one stub used to reach say, printf, and we need to
3113 distinguish between them. */
3114 id_sec = htab->stub_group[input_section->id].link_sec;
3115
3116 if (h != NULL && h->stub_cache != NULL
3117 && h->stub_cache->h == h
3118 && h->stub_cache->id_sec == id_sec)
3119 {
3120 stub_entry = h->stub_cache;
3121 }
3122 else
3123 {
3124 char *stub_name;
3125
3126 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3127 if (stub_name == NULL)
3128 return NULL;
3129
3130 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3131 stub_name, FALSE, FALSE);
3132 if (h != NULL)
3133 h->stub_cache = stub_entry;
3134
3135 free (stub_name);
3136 }
3137
3138 return stub_entry;
3139 }
3140
3141 /* Add a new stub entry to the stub hash. Not all fields of the new
3142 stub entry are initialised. */
3143
3144 static struct ppc_stub_hash_entry *
3145 ppc_add_stub (const char *stub_name,
3146 asection *section,
3147 struct ppc_link_hash_table *htab)
3148 {
3149 asection *link_sec;
3150 asection *stub_sec;
3151 struct ppc_stub_hash_entry *stub_entry;
3152
3153 link_sec = htab->stub_group[section->id].link_sec;
3154 stub_sec = htab->stub_group[section->id].stub_sec;
3155 if (stub_sec == NULL)
3156 {
3157 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3158 if (stub_sec == NULL)
3159 {
3160 size_t namelen;
3161 bfd_size_type len;
3162 char *s_name;
3163
3164 namelen = strlen (link_sec->name);
3165 len = namelen + sizeof (STUB_SUFFIX);
3166 s_name = bfd_alloc (htab->stub_bfd, len);
3167 if (s_name == NULL)
3168 return NULL;
3169
3170 memcpy (s_name, link_sec->name, namelen);
3171 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3172 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3173 if (stub_sec == NULL)
3174 return NULL;
3175 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3176 }
3177 htab->stub_group[section->id].stub_sec = stub_sec;
3178 }
3179
3180 /* Enter this entry into the linker stub hash table. */
3181 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3182 TRUE, FALSE);
3183 if (stub_entry == NULL)
3184 {
3185 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3186 bfd_archive_filename (section->owner),
3187 stub_name);
3188 return NULL;
3189 }
3190
3191 stub_entry->stub_sec = stub_sec;
3192 stub_entry->stub_offset = 0;
3193 stub_entry->id_sec = link_sec;
3194 return stub_entry;
3195 }
3196
3197 /* Create sections for linker generated code. */
3198
3199 static bfd_boolean
3200 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3201 {
3202 struct ppc_link_hash_table *htab;
3203 flagword flags;
3204
3205 htab = ppc_hash_table (info);
3206
3207 /* Create .sfpr for code to save and restore fp regs. */
3208 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3209 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3210 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3211 if (htab->sfpr == NULL
3212 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3213 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3214 return FALSE;
3215
3216 /* Create .glink for lazy dynamic linking support. */
3217 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3218 if (htab->glink == NULL
3219 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3220 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3221 return FALSE;
3222
3223 /* Create .branch_lt for plt_branch stubs. */
3224 flags = (SEC_ALLOC | SEC_LOAD
3225 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3226 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3227 if (htab->brlt == NULL
3228 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3229 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3230 return FALSE;
3231
3232 if (info->shared)
3233 {
3234 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3235 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3236 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3237 if (!htab->relbrlt
3238 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3239 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3240 return FALSE;
3241 }
3242 return TRUE;
3243 }
3244
3245 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3246 not already done. */
3247
3248 static bfd_boolean
3249 create_got_section (bfd *abfd, struct bfd_link_info *info)
3250 {
3251 asection *got, *relgot;
3252 flagword flags;
3253 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3254
3255 if (!htab->got)
3256 {
3257 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3258 return FALSE;
3259
3260 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3261 if (!htab->got)
3262 abort ();
3263 }
3264
3265 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3266 | SEC_LINKER_CREATED);
3267
3268 got = bfd_make_section (abfd, ".got");
3269 if (!got
3270 || !bfd_set_section_flags (abfd, got, flags)
3271 || !bfd_set_section_alignment (abfd, got, 3))
3272 return FALSE;
3273
3274 relgot = bfd_make_section (abfd, ".rela.got");
3275 if (!relgot
3276 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3277 || ! bfd_set_section_alignment (abfd, relgot, 3))
3278 return FALSE;
3279
3280 ppc64_elf_tdata (abfd)->got = got;
3281 ppc64_elf_tdata (abfd)->relgot = relgot;
3282 return TRUE;
3283 }
3284
3285 /* Create the dynamic sections, and set up shortcuts. */
3286
3287 static bfd_boolean
3288 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3289 {
3290 struct ppc_link_hash_table *htab;
3291
3292 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3293 return FALSE;
3294
3295 htab = ppc_hash_table (info);
3296 if (!htab->got)
3297 htab->got = bfd_get_section_by_name (dynobj, ".got");
3298 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3299 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3300 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3301 if (!info->shared)
3302 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3303
3304 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3305 || (!info->shared && !htab->relbss))
3306 abort ();
3307
3308 return TRUE;
3309 }
3310
3311 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3312
3313 static void
3314 ppc64_elf_copy_indirect_symbol
3315 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3316 struct elf_link_hash_entry *dir,
3317 struct elf_link_hash_entry *ind)
3318 {
3319 struct ppc_link_hash_entry *edir, *eind;
3320 flagword mask;
3321
3322 edir = (struct ppc_link_hash_entry *) dir;
3323 eind = (struct ppc_link_hash_entry *) ind;
3324
3325 /* Copy over any dynamic relocs we may have on the indirect sym. */
3326 if (eind->dyn_relocs != NULL)
3327 {
3328 if (edir->dyn_relocs != NULL)
3329 {
3330 struct ppc_dyn_relocs **pp;
3331 struct ppc_dyn_relocs *p;
3332
3333 if (eind->elf.root.type == bfd_link_hash_indirect)
3334 abort ();
3335
3336 /* Add reloc counts against the weak sym to the strong sym
3337 list. Merge any entries against the same section. */
3338 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3339 {
3340 struct ppc_dyn_relocs *q;
3341
3342 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3343 if (q->sec == p->sec)
3344 {
3345 q->pc_count += p->pc_count;
3346 q->count += p->count;
3347 *pp = p->next;
3348 break;
3349 }
3350 if (q == NULL)
3351 pp = &p->next;
3352 }
3353 *pp = edir->dyn_relocs;
3354 }
3355
3356 edir->dyn_relocs = eind->dyn_relocs;
3357 eind->dyn_relocs = NULL;
3358 }
3359
3360 edir->is_func |= eind->is_func;
3361 edir->is_func_descriptor |= eind->is_func_descriptor;
3362 edir->is_entry |= eind->is_entry;
3363 edir->tls_mask |= eind->tls_mask;
3364
3365 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3366 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3367 /* If called to transfer flags for a weakdef during processing
3368 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3369 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3370 if (ELIMINATE_COPY_RELOCS
3371 && eind->elf.root.type != bfd_link_hash_indirect
3372 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3373 mask &= ~ELF_LINK_NON_GOT_REF;
3374
3375 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3376
3377 /* If we were called to copy over info for a weak sym, that's all. */
3378 if (eind->elf.root.type != bfd_link_hash_indirect)
3379 return;
3380
3381 /* Copy over got entries that we may have already seen to the
3382 symbol which just became indirect. */
3383 if (eind->elf.got.glist != NULL)
3384 {
3385 if (edir->elf.got.glist != NULL)
3386 {
3387 struct got_entry **entp;
3388 struct got_entry *ent;
3389
3390 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3391 {
3392 struct got_entry *dent;
3393
3394 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3395 if (dent->addend == ent->addend
3396 && dent->owner == ent->owner
3397 && dent->tls_type == ent->tls_type)
3398 {
3399 dent->got.refcount += ent->got.refcount;
3400 *entp = ent->next;
3401 break;
3402 }
3403 if (dent == NULL)
3404 entp = &ent->next;
3405 }
3406 *entp = edir->elf.got.glist;
3407 }
3408
3409 edir->elf.got.glist = eind->elf.got.glist;
3410 eind->elf.got.glist = NULL;
3411 }
3412
3413 /* And plt entries. */
3414 if (eind->elf.plt.plist != NULL)
3415 {
3416 if (edir->elf.plt.plist != NULL)
3417 {
3418 struct plt_entry **entp;
3419 struct plt_entry *ent;
3420
3421 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3422 {
3423 struct plt_entry *dent;
3424
3425 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3426 if (dent->addend == ent->addend)
3427 {
3428 dent->plt.refcount += ent->plt.refcount;
3429 *entp = ent->next;
3430 break;
3431 }
3432 if (dent == NULL)
3433 entp = &ent->next;
3434 }
3435 *entp = edir->elf.plt.plist;
3436 }
3437
3438 edir->elf.plt.plist = eind->elf.plt.plist;
3439 eind->elf.plt.plist = NULL;
3440 }
3441
3442 if (edir->elf.dynindx == -1)
3443 {
3444 edir->elf.dynindx = eind->elf.dynindx;
3445 edir->elf.dynstr_index = eind->elf.dynstr_index;
3446 eind->elf.dynindx = -1;
3447 eind->elf.dynstr_index = 0;
3448 }
3449 else
3450 BFD_ASSERT (eind->elf.dynindx == -1);
3451 }
3452
3453 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3454 symbols undefined on the command-line. */
3455
3456 bfd_boolean
3457 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3458 {
3459 struct ppc_link_hash_table *htab;
3460 struct bfd_sym_chain *sym;
3461
3462 htab = ppc_hash_table (info);
3463 for (sym = info->gc_sym_list; sym; sym = sym->next)
3464 {
3465 struct elf_link_hash_entry *h;
3466
3467 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3468 if (h != NULL)
3469 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3470 }
3471 return TRUE;
3472 }
3473
3474 static bfd_boolean
3475 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3476 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3477 {
3478 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3479 char *local_got_tls_masks;
3480
3481 if (local_got_ents == NULL)
3482 {
3483 bfd_size_type size = symtab_hdr->sh_info;
3484
3485 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3486 local_got_ents = bfd_zalloc (abfd, size);
3487 if (local_got_ents == NULL)
3488 return FALSE;
3489 elf_local_got_ents (abfd) = local_got_ents;
3490 }
3491
3492 if ((tls_type & TLS_EXPLICIT) == 0)
3493 {
3494 struct got_entry *ent;
3495
3496 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3497 if (ent->addend == r_addend
3498 && ent->owner == abfd
3499 && ent->tls_type == tls_type)
3500 break;
3501 if (ent == NULL)
3502 {
3503 bfd_size_type amt = sizeof (*ent);
3504 ent = bfd_alloc (abfd, amt);
3505 if (ent == NULL)
3506 return FALSE;
3507 ent->next = local_got_ents[r_symndx];
3508 ent->addend = r_addend;
3509 ent->owner = abfd;
3510 ent->tls_type = tls_type;
3511 ent->got.refcount = 0;
3512 local_got_ents[r_symndx] = ent;
3513 }
3514 ent->got.refcount += 1;
3515 }
3516
3517 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3518 local_got_tls_masks[r_symndx] |= tls_type;
3519 return TRUE;
3520 }
3521
3522 static bfd_boolean
3523 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3524 {
3525 struct plt_entry *ent;
3526
3527 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3528 if (ent->addend == addend)
3529 break;
3530 if (ent == NULL)
3531 {
3532 bfd_size_type amt = sizeof (*ent);
3533 ent = bfd_alloc (abfd, amt);
3534 if (ent == NULL)
3535 return FALSE;
3536 ent->next = eh->elf.plt.plist;
3537 ent->addend = addend;
3538 ent->plt.refcount = 0;
3539 eh->elf.plt.plist = ent;
3540 }
3541 ent->plt.refcount += 1;
3542 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3543 eh->is_func = 1;
3544 return TRUE;
3545 }
3546
3547 /* Find the function descriptor hash entry from the given function code
3548 hash entry FH. Link the entries via their OH fields. */
3549 static struct ppc_link_hash_entry *
3550 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3551 {
3552 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3553
3554 if (fdh == NULL)
3555 {
3556 const char *fd_name = fh->elf.root.root.string + 1;
3557
3558 fdh = (struct ppc_link_hash_entry *)
3559 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3560 if (fdh != NULL)
3561 {
3562 fdh->is_func_descriptor = 1;
3563 fdh->oh = &fh->elf;
3564 fh->is_func = 1;
3565 fh->oh = &fdh->elf;
3566 }
3567 }
3568
3569 return fdh;
3570 }
3571
3572 /* Look through the relocs for a section during the first phase, and
3573 calculate needed space in the global offset table, procedure
3574 linkage table, and dynamic reloc sections. */
3575
3576 static bfd_boolean
3577 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3578 asection *sec, const Elf_Internal_Rela *relocs)
3579 {
3580 struct ppc_link_hash_table *htab;
3581 Elf_Internal_Shdr *symtab_hdr;
3582 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3583 const Elf_Internal_Rela *rel;
3584 const Elf_Internal_Rela *rel_end;
3585 asection *sreloc;
3586 asection **opd_sym_map;
3587
3588 if (info->relocatable)
3589 return TRUE;
3590
3591 htab = ppc_hash_table (info);
3592 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3593
3594 sym_hashes = elf_sym_hashes (abfd);
3595 sym_hashes_end = (sym_hashes
3596 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3597 - symtab_hdr->sh_info);
3598
3599 sreloc = NULL;
3600 opd_sym_map = NULL;
3601 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3602 {
3603 /* Garbage collection needs some extra help with .opd sections.
3604 We don't want to necessarily keep everything referenced by
3605 relocs in .opd, as that would keep all functions. Instead,
3606 if we reference an .opd symbol (a function descriptor), we
3607 want to keep the function code symbol's section. This is
3608 easy for global symbols, but for local syms we need to keep
3609 information about the associated function section. Later, if
3610 edit_opd deletes entries, we'll use this array to adjust
3611 local syms in .opd. */
3612 union opd_info {
3613 asection *func_section;
3614 long entry_adjust;
3615 };
3616 bfd_size_type amt;
3617
3618 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3619 opd_sym_map = bfd_zalloc (abfd, amt);
3620 if (opd_sym_map == NULL)
3621 return FALSE;
3622 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3623 }
3624
3625 if (htab->sfpr == NULL
3626 && !create_linkage_sections (htab->elf.dynobj, info))
3627 return FALSE;
3628
3629 rel_end = relocs + sec->reloc_count;
3630 for (rel = relocs; rel < rel_end; rel++)
3631 {
3632 unsigned long r_symndx;
3633 struct elf_link_hash_entry *h;
3634 enum elf_ppc64_reloc_type r_type;
3635 int tls_type = 0;
3636
3637 r_symndx = ELF64_R_SYM (rel->r_info);
3638 if (r_symndx < symtab_hdr->sh_info)
3639 h = NULL;
3640 else
3641 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3642
3643 r_type = ELF64_R_TYPE (rel->r_info);
3644 switch (r_type)
3645 {
3646 case R_PPC64_GOT_TLSLD16:
3647 case R_PPC64_GOT_TLSLD16_LO:
3648 case R_PPC64_GOT_TLSLD16_HI:
3649 case R_PPC64_GOT_TLSLD16_HA:
3650 ppc64_tlsld_got (abfd)->refcount += 1;
3651 tls_type = TLS_TLS | TLS_LD;
3652 goto dogottls;
3653
3654 case R_PPC64_GOT_TLSGD16:
3655 case R_PPC64_GOT_TLSGD16_LO:
3656 case R_PPC64_GOT_TLSGD16_HI:
3657 case R_PPC64_GOT_TLSGD16_HA:
3658 tls_type = TLS_TLS | TLS_GD;
3659 goto dogottls;
3660
3661 case R_PPC64_GOT_TPREL16_DS:
3662 case R_PPC64_GOT_TPREL16_LO_DS:
3663 case R_PPC64_GOT_TPREL16_HI:
3664 case R_PPC64_GOT_TPREL16_HA:
3665 if (info->shared)
3666 info->flags |= DF_STATIC_TLS;
3667 tls_type = TLS_TLS | TLS_TPREL;
3668 goto dogottls;
3669
3670 case R_PPC64_GOT_DTPREL16_DS:
3671 case R_PPC64_GOT_DTPREL16_LO_DS:
3672 case R_PPC64_GOT_DTPREL16_HI:
3673 case R_PPC64_GOT_DTPREL16_HA:
3674 tls_type = TLS_TLS | TLS_DTPREL;
3675 dogottls:
3676 sec->has_tls_reloc = 1;
3677 /* Fall thru */
3678
3679 case R_PPC64_GOT16:
3680 case R_PPC64_GOT16_DS:
3681 case R_PPC64_GOT16_HA:
3682 case R_PPC64_GOT16_HI:
3683 case R_PPC64_GOT16_LO:
3684 case R_PPC64_GOT16_LO_DS:
3685 /* This symbol requires a global offset table entry. */
3686 sec->has_gp_reloc = 1;
3687 if (ppc64_elf_tdata (abfd)->got == NULL
3688 && !create_got_section (abfd, info))
3689 return FALSE;
3690
3691 if (h != NULL)
3692 {
3693 struct ppc_link_hash_entry *eh;
3694 struct got_entry *ent;
3695
3696 eh = (struct ppc_link_hash_entry *) h;
3697 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3698 if (ent->addend == rel->r_addend
3699 && ent->owner == abfd
3700 && ent->tls_type == tls_type)
3701 break;
3702 if (ent == NULL)
3703 {
3704 bfd_size_type amt = sizeof (*ent);
3705 ent = bfd_alloc (abfd, amt);
3706 if (ent == NULL)
3707 return FALSE;
3708 ent->next = eh->elf.got.glist;
3709 ent->addend = rel->r_addend;
3710 ent->owner = abfd;
3711 ent->tls_type = tls_type;
3712 ent->got.refcount = 0;
3713 eh->elf.got.glist = ent;
3714 }
3715 ent->got.refcount += 1;
3716 eh->tls_mask |= tls_type;
3717 }
3718 else
3719 /* This is a global offset table entry for a local symbol. */
3720 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3721 rel->r_addend, tls_type))
3722 return FALSE;
3723 break;
3724
3725 case R_PPC64_PLT16_HA:
3726 case R_PPC64_PLT16_HI:
3727 case R_PPC64_PLT16_LO:
3728 case R_PPC64_PLT32:
3729 case R_PPC64_PLT64:
3730 /* This symbol requires a procedure linkage table entry. We
3731 actually build the entry in adjust_dynamic_symbol,
3732 because this might be a case of linking PIC code without
3733 linking in any dynamic objects, in which case we don't
3734 need to generate a procedure linkage table after all. */
3735 if (h == NULL)
3736 {
3737 /* It does not make sense to have a procedure linkage
3738 table entry for a local symbol. */
3739 bfd_set_error (bfd_error_bad_value);
3740 return FALSE;
3741 }
3742 else
3743 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3744 rel->r_addend))
3745 return FALSE;
3746 break;
3747
3748 /* The following relocations don't need to propagate the
3749 relocation if linking a shared object since they are
3750 section relative. */
3751 case R_PPC64_SECTOFF:
3752 case R_PPC64_SECTOFF_LO:
3753 case R_PPC64_SECTOFF_HI:
3754 case R_PPC64_SECTOFF_HA:
3755 case R_PPC64_SECTOFF_DS:
3756 case R_PPC64_SECTOFF_LO_DS:
3757 case R_PPC64_DTPREL16:
3758 case R_PPC64_DTPREL16_LO:
3759 case R_PPC64_DTPREL16_HI:
3760 case R_PPC64_DTPREL16_HA:
3761 case R_PPC64_DTPREL16_DS:
3762 case R_PPC64_DTPREL16_LO_DS:
3763 case R_PPC64_DTPREL16_HIGHER:
3764 case R_PPC64_DTPREL16_HIGHERA:
3765 case R_PPC64_DTPREL16_HIGHEST:
3766 case R_PPC64_DTPREL16_HIGHESTA:
3767 break;
3768
3769 /* Nor do these. */
3770 case R_PPC64_TOC16:
3771 case R_PPC64_TOC16_LO:
3772 case R_PPC64_TOC16_HI:
3773 case R_PPC64_TOC16_HA:
3774 case R_PPC64_TOC16_DS:
3775 case R_PPC64_TOC16_LO_DS:
3776 sec->has_gp_reloc = 1;
3777 break;
3778
3779 /* This relocation describes the C++ object vtable hierarchy.
3780 Reconstruct it for later use during GC. */
3781 case R_PPC64_GNU_VTINHERIT:
3782 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3783 return FALSE;
3784 break;
3785
3786 /* This relocation describes which C++ vtable entries are actually
3787 used. Record for later use during GC. */
3788 case R_PPC64_GNU_VTENTRY:
3789 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3790 return FALSE;
3791 break;
3792
3793 case R_PPC64_REL14:
3794 case R_PPC64_REL14_BRTAKEN:
3795 case R_PPC64_REL14_BRNTAKEN:
3796 htab->has_14bit_branch = 1;
3797 /* Fall through. */
3798
3799 case R_PPC64_REL24:
3800 if (h != NULL
3801 && h->root.root.string[0] == '.'
3802 && h->root.root.string[1] != 0)
3803 {
3804 /* We may need a .plt entry if the function this reloc
3805 refers to is in a shared lib. */
3806 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3807 rel->r_addend))
3808 return FALSE;
3809 if (h == htab->tls_get_addr)
3810 sec->has_tls_reloc = 1;
3811 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3812 == 0)
3813 && (h->root.root.string[15] == 0
3814 || h->root.root.string[15] == '@'))
3815 {
3816 htab->tls_get_addr = h;
3817 sec->has_tls_reloc = 1;
3818 }
3819 }
3820 break;
3821
3822 case R_PPC64_TPREL64:
3823 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3824 if (info->shared)
3825 info->flags |= DF_STATIC_TLS;
3826 goto dotlstoc;
3827
3828 case R_PPC64_DTPMOD64:
3829 if (rel + 1 < rel_end
3830 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3831 && rel[1].r_offset == rel->r_offset + 8)
3832 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3833 else
3834 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3835 goto dotlstoc;
3836
3837 case R_PPC64_DTPREL64:
3838 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3839 if (rel != relocs
3840 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3841 && rel[-1].r_offset == rel->r_offset - 8)
3842 /* This is the second reloc of a dtpmod, dtprel pair.
3843 Don't mark with TLS_DTPREL. */
3844 goto dodyn;
3845
3846 dotlstoc:
3847 sec->has_tls_reloc = 1;
3848 if (h != NULL)
3849 {
3850 struct ppc_link_hash_entry *eh;
3851 eh = (struct ppc_link_hash_entry *) h;
3852 eh->tls_mask |= tls_type;
3853 }
3854 else
3855 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3856 rel->r_addend, tls_type))
3857 return FALSE;
3858
3859 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3860 {
3861 /* One extra to simplify get_tls_mask. */
3862 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3863 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3864 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3865 return FALSE;
3866 }
3867 BFD_ASSERT (rel->r_offset % 8 == 0);
3868 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3869
3870 /* Mark the second slot of a GD or LD entry.
3871 -1 to indicate GD and -2 to indicate LD. */
3872 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3873 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3874 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3875 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3876 goto dodyn;
3877
3878 case R_PPC64_TPREL16:
3879 case R_PPC64_TPREL16_LO:
3880 case R_PPC64_TPREL16_HI:
3881 case R_PPC64_TPREL16_HA:
3882 case R_PPC64_TPREL16_DS:
3883 case R_PPC64_TPREL16_LO_DS:
3884 case R_PPC64_TPREL16_HIGHER:
3885 case R_PPC64_TPREL16_HIGHERA:
3886 case R_PPC64_TPREL16_HIGHEST:
3887 case R_PPC64_TPREL16_HIGHESTA:
3888 if (info->shared)
3889 {
3890 info->flags |= DF_STATIC_TLS;
3891 goto dodyn;
3892 }
3893 break;
3894
3895 case R_PPC64_ADDR64:
3896 if (opd_sym_map != NULL
3897 && h != NULL
3898 && h->root.root.string[0] == '.'
3899 && h->root.root.string[1] != 0)
3900 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3901
3902 if (opd_sym_map != NULL
3903 && h == NULL
3904 && rel + 1 < rel_end
3905 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3906 {
3907 asection *s;
3908
3909 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3910 r_symndx);
3911 if (s == NULL)
3912 return FALSE;
3913 else if (s != sec)
3914 opd_sym_map[rel->r_offset / 24] = s;
3915 }
3916 /* Fall through. */
3917
3918 case R_PPC64_REL30:
3919 case R_PPC64_REL32:
3920 case R_PPC64_REL64:
3921 case R_PPC64_ADDR14:
3922 case R_PPC64_ADDR14_BRNTAKEN:
3923 case R_PPC64_ADDR14_BRTAKEN:
3924 case R_PPC64_ADDR16:
3925 case R_PPC64_ADDR16_DS:
3926 case R_PPC64_ADDR16_HA:
3927 case R_PPC64_ADDR16_HI:
3928 case R_PPC64_ADDR16_HIGHER:
3929 case R_PPC64_ADDR16_HIGHERA:
3930 case R_PPC64_ADDR16_HIGHEST:
3931 case R_PPC64_ADDR16_HIGHESTA:
3932 case R_PPC64_ADDR16_LO:
3933 case R_PPC64_ADDR16_LO_DS:
3934 case R_PPC64_ADDR24:
3935 case R_PPC64_ADDR32:
3936 case R_PPC64_UADDR16:
3937 case R_PPC64_UADDR32:
3938 case R_PPC64_UADDR64:
3939 case R_PPC64_TOC:
3940 if (h != NULL && !info->shared)
3941 /* We may need a copy reloc. */
3942 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3943
3944 /* Don't propagate .opd relocs. */
3945 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3946 break;
3947
3948 /* Don't propagate relocs that the dynamic linker won't relocate. */
3949 if ((sec->flags & SEC_ALLOC) == 0)
3950 break;
3951
3952 /* If we are creating a shared library, and this is a reloc
3953 against a global symbol, or a non PC relative reloc
3954 against a local symbol, then we need to copy the reloc
3955 into the shared library. However, if we are linking with
3956 -Bsymbolic, we do not need to copy a reloc against a
3957 global symbol which is defined in an object we are
3958 including in the link (i.e., DEF_REGULAR is set). At
3959 this point we have not seen all the input files, so it is
3960 possible that DEF_REGULAR is not set now but will be set
3961 later (it is never cleared). In case of a weak definition,
3962 DEF_REGULAR may be cleared later by a strong definition in
3963 a shared library. We account for that possibility below by
3964 storing information in the dyn_relocs field of the hash
3965 table entry. A similar situation occurs when creating
3966 shared libraries and symbol visibility changes render the
3967 symbol local.
3968
3969 If on the other hand, we are creating an executable, we
3970 may need to keep relocations for symbols satisfied by a
3971 dynamic library if we manage to avoid copy relocs for the
3972 symbol. */
3973 dodyn:
3974 if ((info->shared
3975 && (MUST_BE_DYN_RELOC (r_type)
3976 || (h != NULL
3977 && (! info->symbolic
3978 || h->root.type == bfd_link_hash_defweak
3979 || (h->elf_link_hash_flags
3980 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3981 || (ELIMINATE_COPY_RELOCS
3982 && !info->shared
3983 && h != NULL
3984 && (h->root.type == bfd_link_hash_defweak
3985 || (h->elf_link_hash_flags
3986 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3987 {
3988 struct ppc_dyn_relocs *p;
3989 struct ppc_dyn_relocs **head;
3990
3991 /* We must copy these reloc types into the output file.
3992 Create a reloc section in dynobj and make room for
3993 this reloc. */
3994 if (sreloc == NULL)
3995 {
3996 const char *name;
3997 bfd *dynobj;
3998
3999 name = (bfd_elf_string_from_elf_section
4000 (abfd,
4001 elf_elfheader (abfd)->e_shstrndx,
4002 elf_section_data (sec)->rel_hdr.sh_name));
4003 if (name == NULL)
4004 return FALSE;
4005
4006 if (strncmp (name, ".rela", 5) != 0
4007 || strcmp (bfd_get_section_name (abfd, sec),
4008 name + 5) != 0)
4009 {
4010 (*_bfd_error_handler)
4011 (_("%s: bad relocation section name `%s\'"),
4012 bfd_archive_filename (abfd), name);
4013 bfd_set_error (bfd_error_bad_value);
4014 }
4015
4016 dynobj = htab->elf.dynobj;
4017 sreloc = bfd_get_section_by_name (dynobj, name);
4018 if (sreloc == NULL)
4019 {
4020 flagword flags;
4021
4022 sreloc = bfd_make_section (dynobj, name);
4023 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4024 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4025 if ((sec->flags & SEC_ALLOC) != 0)
4026 flags |= SEC_ALLOC | SEC_LOAD;
4027 if (sreloc == NULL
4028 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4029 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4030 return FALSE;
4031 }
4032 elf_section_data (sec)->sreloc = sreloc;
4033 }
4034
4035 /* If this is a global symbol, we count the number of
4036 relocations we need for this symbol. */
4037 if (h != NULL)
4038 {
4039 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4040 }
4041 else
4042 {
4043 /* Track dynamic relocs needed for local syms too.
4044 We really need local syms available to do this
4045 easily. Oh well. */
4046
4047 asection *s;
4048 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4049 sec, r_symndx);
4050 if (s == NULL)
4051 return FALSE;
4052
4053 head = ((struct ppc_dyn_relocs **)
4054 &elf_section_data (s)->local_dynrel);
4055 }
4056
4057 p = *head;
4058 if (p == NULL || p->sec != sec)
4059 {
4060 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4061 if (p == NULL)
4062 return FALSE;
4063 p->next = *head;
4064 *head = p;
4065 p->sec = sec;
4066 p->count = 0;
4067 p->pc_count = 0;
4068 }
4069
4070 p->count += 1;
4071 if (!MUST_BE_DYN_RELOC (r_type))
4072 p->pc_count += 1;
4073 }
4074 break;
4075
4076 default:
4077 break;
4078 }
4079 }
4080
4081 return TRUE;
4082 }
4083
4084 /* Return the section that should be marked against GC for a given
4085 relocation. */
4086
4087 static asection *
4088 ppc64_elf_gc_mark_hook (asection *sec,
4089 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4090 Elf_Internal_Rela *rel,
4091 struct elf_link_hash_entry *h,
4092 Elf_Internal_Sym *sym)
4093 {
4094 asection *rsec = NULL;
4095
4096 if (h != NULL)
4097 {
4098 enum elf_ppc64_reloc_type r_type;
4099 struct ppc_link_hash_entry *fdh;
4100
4101 r_type = ELF64_R_TYPE (rel->r_info);
4102 switch (r_type)
4103 {
4104 case R_PPC64_GNU_VTINHERIT:
4105 case R_PPC64_GNU_VTENTRY:
4106 break;
4107
4108 default:
4109 switch (h->root.type)
4110 {
4111 case bfd_link_hash_defined:
4112 case bfd_link_hash_defweak:
4113 fdh = (struct ppc_link_hash_entry *) h;
4114
4115 /* Function descriptor syms cause the associated
4116 function code sym section to be marked. */
4117 if (fdh->is_func_descriptor)
4118 rsec = fdh->oh->root.u.def.section;
4119
4120 /* Function entry syms return NULL if they are in .opd
4121 and are not ._start (or others undefined on the ld
4122 command line). Thus we avoid marking all function
4123 sections, as all functions are referenced in .opd. */
4124 else if ((fdh->oh != NULL
4125 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4126 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4127 rsec = h->root.u.def.section;
4128 break;
4129
4130 case bfd_link_hash_common:
4131 rsec = h->root.u.c.p->section;
4132 break;
4133
4134 default:
4135 break;
4136 }
4137 }
4138 }
4139 else
4140 {
4141 asection **opd_sym_section;
4142
4143 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4144 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4145 if (opd_sym_section != NULL)
4146 rsec = opd_sym_section[sym->st_value / 24];
4147 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4148 rsec = NULL;
4149 }
4150
4151 return rsec;
4152 }
4153
4154 /* Update the .got, .plt. and dynamic reloc reference counts for the
4155 section being removed. */
4156
4157 static bfd_boolean
4158 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4159 asection *sec, const Elf_Internal_Rela *relocs)
4160 {
4161 struct ppc_link_hash_table *htab;
4162 Elf_Internal_Shdr *symtab_hdr;
4163 struct elf_link_hash_entry **sym_hashes;
4164 struct got_entry **local_got_ents;
4165 const Elf_Internal_Rela *rel, *relend;
4166
4167 elf_section_data (sec)->local_dynrel = NULL;
4168
4169 htab = ppc_hash_table (info);
4170 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4171 sym_hashes = elf_sym_hashes (abfd);
4172 local_got_ents = elf_local_got_ents (abfd);
4173
4174 relend = relocs + sec->reloc_count;
4175 for (rel = relocs; rel < relend; rel++)
4176 {
4177 unsigned long r_symndx;
4178 enum elf_ppc64_reloc_type r_type;
4179 struct elf_link_hash_entry *h = NULL;
4180 char tls_type = 0;
4181
4182 r_symndx = ELF64_R_SYM (rel->r_info);
4183 r_type = ELF64_R_TYPE (rel->r_info);
4184 if (r_symndx >= symtab_hdr->sh_info)
4185 {
4186 struct ppc_link_hash_entry *eh;
4187 struct ppc_dyn_relocs **pp;
4188 struct ppc_dyn_relocs *p;
4189
4190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4191 eh = (struct ppc_link_hash_entry *) h;
4192
4193 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4194 if (p->sec == sec)
4195 {
4196 /* Everything must go for SEC. */
4197 *pp = p->next;
4198 break;
4199 }
4200 }
4201
4202 switch (r_type)
4203 {
4204 case R_PPC64_GOT_TLSLD16:
4205 case R_PPC64_GOT_TLSLD16_LO:
4206 case R_PPC64_GOT_TLSLD16_HI:
4207 case R_PPC64_GOT_TLSLD16_HA:
4208 ppc64_tlsld_got (abfd)->refcount -= 1;
4209 tls_type = TLS_TLS | TLS_LD;
4210 goto dogot;
4211
4212 case R_PPC64_GOT_TLSGD16:
4213 case R_PPC64_GOT_TLSGD16_LO:
4214 case R_PPC64_GOT_TLSGD16_HI:
4215 case R_PPC64_GOT_TLSGD16_HA:
4216 tls_type = TLS_TLS | TLS_GD;
4217 goto dogot;
4218
4219 case R_PPC64_GOT_TPREL16_DS:
4220 case R_PPC64_GOT_TPREL16_LO_DS:
4221 case R_PPC64_GOT_TPREL16_HI:
4222 case R_PPC64_GOT_TPREL16_HA:
4223 tls_type = TLS_TLS | TLS_TPREL;
4224 goto dogot;
4225
4226 case R_PPC64_GOT_DTPREL16_DS:
4227 case R_PPC64_GOT_DTPREL16_LO_DS:
4228 case R_PPC64_GOT_DTPREL16_HI:
4229 case R_PPC64_GOT_DTPREL16_HA:
4230 tls_type = TLS_TLS | TLS_DTPREL;
4231 goto dogot;
4232
4233 case R_PPC64_GOT16:
4234 case R_PPC64_GOT16_DS:
4235 case R_PPC64_GOT16_HA:
4236 case R_PPC64_GOT16_HI:
4237 case R_PPC64_GOT16_LO:
4238 case R_PPC64_GOT16_LO_DS:
4239 dogot:
4240 {
4241 struct got_entry *ent;
4242
4243 if (h != NULL)
4244 ent = h->got.glist;
4245 else
4246 ent = local_got_ents[r_symndx];
4247
4248 for (; ent != NULL; ent = ent->next)
4249 if (ent->addend == rel->r_addend
4250 && ent->owner == abfd
4251 && ent->tls_type == tls_type)
4252 break;
4253 if (ent == NULL)
4254 abort ();
4255 if (ent->got.refcount > 0)
4256 ent->got.refcount -= 1;
4257 }
4258 break;
4259
4260 case R_PPC64_PLT16_HA:
4261 case R_PPC64_PLT16_HI:
4262 case R_PPC64_PLT16_LO:
4263 case R_PPC64_PLT32:
4264 case R_PPC64_PLT64:
4265 case R_PPC64_REL14:
4266 case R_PPC64_REL14_BRNTAKEN:
4267 case R_PPC64_REL14_BRTAKEN:
4268 case R_PPC64_REL24:
4269 if (h != NULL)
4270 {
4271 struct plt_entry *ent;
4272
4273 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4274 if (ent->addend == rel->r_addend)
4275 break;
4276 if (ent == NULL)
4277 abort ();
4278 if (ent->plt.refcount > 0)
4279 ent->plt.refcount -= 1;
4280 }
4281 break;
4282
4283 default:
4284 break;
4285 }
4286 }
4287 return TRUE;
4288 }
4289
4290 /* Called via elf_link_hash_traverse to transfer dynamic linking
4291 information on function code symbol entries to their corresponding
4292 function descriptor symbol entries. */
4293 static bfd_boolean
4294 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4295 {
4296 struct bfd_link_info *info;
4297 struct ppc_link_hash_table *htab;
4298 struct plt_entry *ent;
4299 struct ppc_link_hash_entry *fh;
4300 struct ppc_link_hash_entry *fdh;
4301 bfd_boolean force_local;
4302
4303 fh = (struct ppc_link_hash_entry *) h;
4304 if (fh->elf.root.type == bfd_link_hash_indirect)
4305 return TRUE;
4306
4307 if (fh->elf.root.type == bfd_link_hash_warning)
4308 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4309
4310 info = inf;
4311 htab = ppc_hash_table (info);
4312
4313 /* If this is a function code symbol, transfer dynamic linking
4314 information to the function descriptor symbol. */
4315 if (!fh->is_func)
4316 return TRUE;
4317
4318 if (fh->elf.root.type == bfd_link_hash_undefweak
4319 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4320 htab->have_undefweak = TRUE;
4321
4322 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4323 if (ent->plt.refcount > 0)
4324 break;
4325 if (ent == NULL
4326 || fh->elf.root.root.string[0] != '.'
4327 || fh->elf.root.root.string[1] == '\0')
4328 return TRUE;
4329
4330 /* Find the corresponding function descriptor symbol. Create it
4331 as undefined if necessary. */
4332
4333 fdh = get_fdh (fh, htab);
4334 if (fdh != NULL)
4335 while (fdh->elf.root.type == bfd_link_hash_indirect
4336 || fdh->elf.root.type == bfd_link_hash_warning)
4337 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4338
4339 if (fdh == NULL
4340 && info->shared
4341 && (fh->elf.root.type == bfd_link_hash_undefined
4342 || fh->elf.root.type == bfd_link_hash_undefweak))
4343 {
4344 bfd *abfd;
4345 asymbol *newsym;
4346 struct bfd_link_hash_entry *bh;
4347
4348 abfd = fh->elf.root.u.undef.abfd;
4349 newsym = bfd_make_empty_symbol (abfd);
4350 newsym->name = fh->elf.root.root.string + 1;
4351 newsym->section = bfd_und_section_ptr;
4352 newsym->value = 0;
4353 newsym->flags = BSF_OBJECT;
4354 if (fh->elf.root.type == bfd_link_hash_undefweak)
4355 newsym->flags |= BSF_WEAK;
4356
4357 bh = &fdh->elf.root;
4358 if ( !(_bfd_generic_link_add_one_symbol
4359 (info, abfd, newsym->name, newsym->flags,
4360 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4361 {
4362 return FALSE;
4363 }
4364 fdh = (struct ppc_link_hash_entry *) bh;
4365 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4366 fdh->elf.size = 24;
4367 fdh->elf.type = STT_OBJECT;
4368 }
4369
4370 if (fdh != NULL
4371 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4372 && (info->shared
4373 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4374 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4375 || (fdh->elf.root.type == bfd_link_hash_undefweak
4376 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4377 {
4378 if (fdh->elf.dynindx == -1)
4379 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4380 return FALSE;
4381 fdh->elf.elf_link_hash_flags
4382 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4383 | ELF_LINK_HASH_REF_DYNAMIC
4384 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4385 | ELF_LINK_NON_GOT_REF));
4386 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4387 {
4388 fdh->elf.plt.plist = fh->elf.plt.plist;
4389 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4390 }
4391 fdh->is_func_descriptor = 1;
4392 fdh->oh = &fh->elf;
4393 fh->oh = &fdh->elf;
4394 }
4395
4396 /* Now that the info is on the function descriptor, clear the
4397 function code sym info. Any function code syms for which we
4398 don't have a definition in a regular file, we force local.
4399 This prevents a shared library from exporting syms that have
4400 been imported from another library. Function code syms that
4401 are really in the library we must leave global to prevent the
4402 linker dragging in a definition from a static library. */
4403 force_local
4404 = (info->shared
4405 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4406 || fdh == NULL
4407 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4408 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4409 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4410
4411 return TRUE;
4412 }
4413
4414 #define MIN_SAVE_FPR 14
4415 #define MAX_SAVE_FPR 31
4416
4417 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4418 this hook to a) provide some gcc support functions, and b) transfer
4419 dynamic linking information gathered so far on function code symbol
4420 entries, to their corresponding function descriptor symbol entries. */
4421 static bfd_boolean
4422 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4423 struct bfd_link_info *info)
4424 {
4425 struct ppc_link_hash_table *htab;
4426 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4427 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4428 unsigned int i;
4429 struct elf_link_hash_entry *h;
4430 bfd_byte *p;
4431 char sym[10];
4432
4433 htab = ppc_hash_table (info);
4434
4435 if (htab->sfpr == NULL)
4436 /* We don't have any relocs. */
4437 return TRUE;
4438
4439 /* First provide any missing ._savef* and ._restf* functions. */
4440 memcpy (sym, "._savef14", 10);
4441 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4442 {
4443 sym[7] = i / 10 + '0';
4444 sym[8] = i % 10 + '0';
4445 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4446 if (h != NULL
4447 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4448 {
4449 if (lowest_savef > i)
4450 lowest_savef = i;
4451 h->root.type = bfd_link_hash_defined;
4452 h->root.u.def.section = htab->sfpr;
4453 h->root.u.def.value = (i - lowest_savef) * 4;
4454 h->type = STT_FUNC;
4455 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4456 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4457 }
4458 }
4459
4460 memcpy (sym, "._restf14", 10);
4461 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4462 {
4463 sym[7] = i / 10 + '0';
4464 sym[8] = i % 10 + '0';
4465 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4466 if (h != NULL
4467 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4468 {
4469 if (lowest_restf > i)
4470 lowest_restf = i;
4471 h->root.type = bfd_link_hash_defined;
4472 h->root.u.def.section = htab->sfpr;
4473 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4474 + (i - lowest_restf) * 4);
4475 h->type = STT_FUNC;
4476 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4477 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4478 }
4479 }
4480
4481 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4482
4483 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4484 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4485
4486 if (htab->sfpr->_raw_size == 0)
4487 {
4488 if (!htab->have_undefweak)
4489 {
4490 _bfd_strip_section_from_output (info, htab->sfpr);
4491 return TRUE;
4492 }
4493
4494 htab->sfpr->_raw_size = 4;
4495 }
4496
4497 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4498 if (p == NULL)
4499 return FALSE;
4500 htab->sfpr->contents = p;
4501
4502 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4503 {
4504 unsigned int fpr = i << 21;
4505 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4506 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4507 p += 4;
4508 }
4509 if (lowest_savef <= MAX_SAVE_FPR)
4510 {
4511 bfd_put_32 (htab->elf.dynobj, BLR, p);
4512 p += 4;
4513 }
4514
4515 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4516 {
4517 unsigned int fpr = i << 21;
4518 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4519 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4520 p += 4;
4521 }
4522 if (lowest_restf <= MAX_SAVE_FPR
4523 || htab->sfpr->_raw_size == 4)
4524 {
4525 bfd_put_32 (htab->elf.dynobj, BLR, p);
4526 }
4527
4528 return TRUE;
4529 }
4530
4531 /* Adjust a symbol defined by a dynamic object and referenced by a
4532 regular object. The current definition is in some section of the
4533 dynamic object, but we're not including those sections. We have to
4534 change the definition to something the rest of the link can
4535 understand. */
4536
4537 static bfd_boolean
4538 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4539 struct elf_link_hash_entry *h)
4540 {
4541 struct ppc_link_hash_table *htab;
4542 asection *s;
4543 unsigned int power_of_two;
4544
4545 htab = ppc_hash_table (info);
4546
4547 /* Deal with function syms. */
4548 if (h->type == STT_FUNC
4549 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4550 {
4551 /* Clear procedure linkage table information for any symbol that
4552 won't need a .plt entry. */
4553 struct plt_entry *ent;
4554 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4555 if (ent->plt.refcount > 0)
4556 break;
4557 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4558 || ent == NULL
4559 || SYMBOL_CALLS_LOCAL (info, h)
4560 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4561 && h->root.type == bfd_link_hash_undefweak))
4562 {
4563 h->plt.plist = NULL;
4564 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4565 }
4566 }
4567 else
4568 h->plt.plist = NULL;
4569
4570 /* If this is a weak symbol, and there is a real definition, the
4571 processor independent code will have arranged for us to see the
4572 real definition first, and we can just use the same value. */
4573 if (h->weakdef != NULL)
4574 {
4575 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4576 || h->weakdef->root.type == bfd_link_hash_defweak);
4577 h->root.u.def.section = h->weakdef->root.u.def.section;
4578 h->root.u.def.value = h->weakdef->root.u.def.value;
4579 if (ELIMINATE_COPY_RELOCS)
4580 h->elf_link_hash_flags
4581 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4582 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4583 return TRUE;
4584 }
4585
4586 /* If we are creating a shared library, we must presume that the
4587 only references to the symbol are via the global offset table.
4588 For such cases we need not do anything here; the relocations will
4589 be handled correctly by relocate_section. */
4590 if (info->shared)
4591 return TRUE;
4592
4593 /* If there are no references to this symbol that do not use the
4594 GOT, we don't need to generate a copy reloc. */
4595 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4596 return TRUE;
4597
4598 if (ELIMINATE_COPY_RELOCS)
4599 {
4600 struct ppc_link_hash_entry * eh;
4601 struct ppc_dyn_relocs *p;
4602
4603 eh = (struct ppc_link_hash_entry *) h;
4604 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4605 {
4606 s = p->sec->output_section;
4607 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4608 break;
4609 }
4610
4611 /* If we didn't find any dynamic relocs in read-only sections, then
4612 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4613 if (p == NULL)
4614 {
4615 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4616 return TRUE;
4617 }
4618 }
4619
4620 if (h->plt.plist != NULL)
4621 {
4622 /* We should never get here, but unfortunately there are versions
4623 of gcc out there that improperly (for this ABI) put initialized
4624 function pointers, vtable refs and suchlike in read-only
4625 sections. Allow them to proceed, but warn that this might
4626 break at runtime. */
4627 (*_bfd_error_handler)
4628 (_("copy reloc against `%s' requires lazy plt linking; "
4629 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4630 h->root.root.string);
4631 }
4632
4633 /* This is a reference to a symbol defined by a dynamic object which
4634 is not a function. */
4635
4636 /* We must allocate the symbol in our .dynbss section, which will
4637 become part of the .bss section of the executable. There will be
4638 an entry for this symbol in the .dynsym section. The dynamic
4639 object will contain position independent code, so all references
4640 from the dynamic object to this symbol will go through the global
4641 offset table. The dynamic linker will use the .dynsym entry to
4642 determine the address it must put in the global offset table, so
4643 both the dynamic object and the regular object will refer to the
4644 same memory location for the variable. */
4645
4646 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4647 to copy the initial value out of the dynamic object and into the
4648 runtime process image. We need to remember the offset into the
4649 .rela.bss section we are going to use. */
4650 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4651 {
4652 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4653 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4654 }
4655
4656 /* We need to figure out the alignment required for this symbol. I
4657 have no idea how ELF linkers handle this. */
4658 power_of_two = bfd_log2 (h->size);
4659 if (power_of_two > 4)
4660 power_of_two = 4;
4661
4662 /* Apply the required alignment. */
4663 s = htab->dynbss;
4664 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4665 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4666 {
4667 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4668 return FALSE;
4669 }
4670
4671 /* Define the symbol as being at this point in the section. */
4672 h->root.u.def.section = s;
4673 h->root.u.def.value = s->_raw_size;
4674
4675 /* Increment the section size to make room for the symbol. */
4676 s->_raw_size += h->size;
4677
4678 return TRUE;
4679 }
4680
4681 /* If given a function descriptor symbol, hide both the function code
4682 sym and the descriptor. */
4683 static void
4684 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4685 struct elf_link_hash_entry *h,
4686 bfd_boolean force_local)
4687 {
4688 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4689
4690 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4691 {
4692 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4693
4694 if (fh == NULL)
4695 {
4696 const char *p, *q;
4697 struct ppc_link_hash_table *htab;
4698 char save;
4699
4700 /* We aren't supposed to use alloca in BFD because on
4701 systems which do not have alloca the version in libiberty
4702 calls xmalloc, which might cause the program to crash
4703 when it runs out of memory. This function doesn't have a
4704 return status, so there's no way to gracefully return an
4705 error. So cheat. We know that string[-1] can be safely
4706 dereferenced; It's either a string in an ELF string
4707 table, or allocated in an objalloc structure. */
4708
4709 p = h->root.root.string - 1;
4710 save = *p;
4711 *(char *) p = '.';
4712 htab = ppc_hash_table (info);
4713 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4714 *(char *) p = save;
4715
4716 /* Unfortunately, if it so happens that the string we were
4717 looking for was allocated immediately before this string,
4718 then we overwrote the string terminator. That's the only
4719 reason the lookup should fail. */
4720 if (fh == NULL)
4721 {
4722 q = h->root.root.string + strlen (h->root.root.string);
4723 while (q >= h->root.root.string && *q == *p)
4724 --q, --p;
4725 if (q < h->root.root.string && *p == '.')
4726 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4727 }
4728 if (fh != NULL)
4729 {
4730 ((struct ppc_link_hash_entry *) h)->oh = fh;
4731 ((struct ppc_link_hash_entry *) fh)->oh = h;
4732 }
4733 }
4734 if (fh != NULL)
4735 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4736 }
4737 }
4738
4739 static bfd_boolean
4740 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4741 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4742 unsigned long r_symndx, bfd *ibfd)
4743 {
4744 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4745
4746 if (r_symndx >= symtab_hdr->sh_info)
4747 {
4748 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4749 struct elf_link_hash_entry *h;
4750
4751 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4752 while (h->root.type == bfd_link_hash_indirect
4753 || h->root.type == bfd_link_hash_warning)
4754 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4755
4756 if (hp != NULL)
4757 *hp = h;
4758
4759 if (symp != NULL)
4760 *symp = NULL;
4761
4762 if (symsecp != NULL)
4763 {
4764 asection *symsec = NULL;
4765 if (h->root.type == bfd_link_hash_defined
4766 || h->root.type == bfd_link_hash_defweak)
4767 symsec = h->root.u.def.section;
4768 *symsecp = symsec;
4769 }
4770
4771 if (tls_maskp != NULL)
4772 {
4773 struct ppc_link_hash_entry *eh;
4774
4775 eh = (struct ppc_link_hash_entry *) h;
4776 *tls_maskp = &eh->tls_mask;
4777 }
4778 }
4779 else
4780 {
4781 Elf_Internal_Sym *sym;
4782 Elf_Internal_Sym *locsyms = *locsymsp;
4783
4784 if (locsyms == NULL)
4785 {
4786 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4787 if (locsyms == NULL)
4788 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4789 symtab_hdr->sh_info,
4790 0, NULL, NULL, NULL);
4791 if (locsyms == NULL)
4792 return FALSE;
4793 *locsymsp = locsyms;
4794 }
4795 sym = locsyms + r_symndx;
4796
4797 if (hp != NULL)
4798 *hp = NULL;
4799
4800 if (symp != NULL)
4801 *symp = sym;
4802
4803 if (symsecp != NULL)
4804 {
4805 asection *symsec = NULL;
4806 if ((sym->st_shndx != SHN_UNDEF
4807 && sym->st_shndx < SHN_LORESERVE)
4808 || sym->st_shndx > SHN_HIRESERVE)
4809 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4810 *symsecp = symsec;
4811 }
4812
4813 if (tls_maskp != NULL)
4814 {
4815 struct got_entry **lgot_ents;
4816 char *tls_mask;
4817
4818 tls_mask = NULL;
4819 lgot_ents = elf_local_got_ents (ibfd);
4820 if (lgot_ents != NULL)
4821 {
4822 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4823 tls_mask = &lgot_masks[r_symndx];
4824 }
4825 *tls_maskp = tls_mask;
4826 }
4827 }
4828 return TRUE;
4829 }
4830
4831 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4832 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4833 type suitable for optimization, and 1 otherwise. */
4834
4835 static int
4836 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4837 Elf_Internal_Sym **locsymsp,
4838 const Elf_Internal_Rela *rel, bfd *ibfd)
4839 {
4840 unsigned long r_symndx;
4841 int next_r;
4842 struct elf_link_hash_entry *h;
4843 Elf_Internal_Sym *sym;
4844 asection *sec;
4845 bfd_vma off;
4846
4847 r_symndx = ELF64_R_SYM (rel->r_info);
4848 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4849 return 0;
4850
4851 if ((*tls_maskp != NULL && **tls_maskp != 0)
4852 || sec == NULL
4853 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4854 return 1;
4855
4856 /* Look inside a TOC section too. */
4857 if (h != NULL)
4858 {
4859 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4860 off = h->root.u.def.value;
4861 }
4862 else
4863 off = sym->st_value;
4864 off += rel->r_addend;
4865 BFD_ASSERT (off % 8 == 0);
4866 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4867 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4868 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4869 return 0;
4870 if (toc_symndx != NULL)
4871 *toc_symndx = r_symndx;
4872 if ((h == NULL
4873 || ((h->root.type == bfd_link_hash_defined
4874 || h->root.type == bfd_link_hash_defweak)
4875 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4876 && (next_r == -1 || next_r == -2))
4877 return 1 - next_r;
4878 return 1;
4879 }
4880
4881 bfd_boolean
4882 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4883 {
4884 bfd *ibfd;
4885
4886 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4887 {
4888 asection *sec;
4889 Elf_Internal_Rela *relstart, *rel, *relend;
4890 Elf_Internal_Shdr *symtab_hdr;
4891 Elf_Internal_Sym *local_syms;
4892 struct elf_link_hash_entry **sym_hashes;
4893 bfd_vma offset;
4894 bfd_size_type amt;
4895 long *adjust;
4896 bfd_boolean need_edit;
4897
4898 sec = bfd_get_section_by_name (ibfd, ".opd");
4899 if (sec == NULL)
4900 continue;
4901
4902 amt = sec->_raw_size * sizeof (long) / 24;
4903 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4904 if (adjust == NULL)
4905 {
4906 /* Must be a ld -r link. ie. check_relocs hasn't been
4907 called. */
4908 adjust = bfd_zalloc (obfd, amt);
4909 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4910 }
4911 memset (adjust, 0, amt);
4912
4913 if (sec->output_section == bfd_abs_section_ptr)
4914 continue;
4915
4916 /* Look through the section relocs. */
4917 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4918 continue;
4919
4920 local_syms = NULL;
4921 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4922 sym_hashes = elf_sym_hashes (ibfd);
4923
4924 /* Read the relocations. */
4925 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4926 info->keep_memory);
4927 if (relstart == NULL)
4928 return FALSE;
4929
4930 /* First run through the relocs to check they are sane, and to
4931 determine whether we need to edit this opd section. */
4932 need_edit = FALSE;
4933 offset = 0;
4934 relend = relstart + sec->reloc_count;
4935 for (rel = relstart; rel < relend; )
4936 {
4937 enum elf_ppc64_reloc_type r_type;
4938 unsigned long r_symndx;
4939 asection *sym_sec;
4940 struct elf_link_hash_entry *h;
4941 Elf_Internal_Sym *sym;
4942
4943 /* .opd contains a regular array of 24 byte entries. We're
4944 only interested in the reloc pointing to a function entry
4945 point. */
4946 if (rel->r_offset != offset
4947 || rel + 1 >= relend
4948 || (rel + 1)->r_offset != offset + 8)
4949 {
4950 /* If someone messes with .opd alignment then after a
4951 "ld -r" we might have padding in the middle of .opd.
4952 Also, there's nothing to prevent someone putting
4953 something silly in .opd with the assembler. No .opd
4954 optimization for them! */
4955 (*_bfd_error_handler)
4956 (_("%s: .opd is not a regular array of opd entries"),
4957 bfd_archive_filename (ibfd));
4958 need_edit = FALSE;
4959 break;
4960 }
4961
4962 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4963 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4964 {
4965 (*_bfd_error_handler)
4966 (_("%s: unexpected reloc type %u in .opd section"),
4967 bfd_archive_filename (ibfd), r_type);
4968 need_edit = FALSE;
4969 break;
4970 }
4971
4972 r_symndx = ELF64_R_SYM (rel->r_info);
4973 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4974 r_symndx, ibfd))
4975 goto error_ret;
4976
4977 if (sym_sec == NULL || sym_sec->owner == NULL)
4978 {
4979 const char *sym_name;
4980 if (h != NULL)
4981 sym_name = h->root.root.string;
4982 else
4983 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4984
4985 (*_bfd_error_handler)
4986 (_("%s: undefined sym `%s' in .opd section"),
4987 bfd_archive_filename (ibfd),
4988 sym_name);
4989 need_edit = FALSE;
4990 break;
4991 }
4992
4993 /* opd entries are always for functions defined in the
4994 current input bfd. If the symbol isn't defined in the
4995 input bfd, then we won't be using the function in this
4996 bfd; It must be defined in a linkonce section in another
4997 bfd, or is weak. It's also possible that we are
4998 discarding the function due to a linker script /DISCARD/,
4999 which we test for via the output_section. */
5000 if (sym_sec->owner != ibfd
5001 || sym_sec->output_section == bfd_abs_section_ptr)
5002 need_edit = TRUE;
5003
5004 offset += 24;
5005 rel += 2;
5006 /* Allow for the possibility of a reloc on the third word. */
5007 if (rel < relend
5008 && rel->r_offset == offset - 8)
5009 rel += 1;
5010 }
5011
5012 if (need_edit)
5013 {
5014 Elf_Internal_Rela *write_rel;
5015 bfd_byte *rptr, *wptr;
5016 bfd_boolean skip;
5017
5018 /* This seems a waste of time as input .opd sections are all
5019 zeros as generated by gcc, but I suppose there's no reason
5020 this will always be so. We might start putting something in
5021 the third word of .opd entries. */
5022 if ((sec->flags & SEC_IN_MEMORY) == 0)
5023 {
5024 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5025 if (loc == NULL
5026 || !bfd_get_section_contents (ibfd, sec, loc, 0,
5027 sec->_raw_size))
5028 {
5029 error_ret:
5030 if (local_syms != NULL
5031 && symtab_hdr->contents != (unsigned char *) local_syms)
5032 free (local_syms);
5033 if (elf_section_data (sec)->relocs != relstart)
5034 free (relstart);
5035 return FALSE;
5036 }
5037 sec->contents = loc;
5038 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5039 }
5040
5041 elf_section_data (sec)->relocs = relstart;
5042
5043 wptr = sec->contents;
5044 rptr = sec->contents;
5045 write_rel = relstart;
5046 skip = FALSE;
5047 offset = 0;
5048 for (rel = relstart; rel < relend; rel++)
5049 {
5050 unsigned long r_symndx;
5051 asection *sym_sec;
5052 struct elf_link_hash_entry *h;
5053 Elf_Internal_Sym *sym;
5054
5055 r_symndx = ELF64_R_SYM (rel->r_info);
5056 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5057 r_symndx, ibfd))
5058 goto error_ret;
5059
5060 if (rel->r_offset == offset)
5061 {
5062 struct ppc_link_hash_entry *fdh = NULL;
5063 if (h != NULL)
5064 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5065 ppc_hash_table (info));
5066
5067 skip = (sym_sec->owner != ibfd
5068 || sym_sec->output_section == bfd_abs_section_ptr);
5069 if (skip)
5070 {
5071 if (h != NULL && sym_sec->owner == ibfd)
5072 {
5073 /* Arrange for the function descriptor sym
5074 to be dropped. */
5075 fdh->elf.root.u.def.value = 0;
5076 fdh->elf.root.u.def.section = sym_sec;
5077 }
5078 }
5079 else
5080 {
5081 /* We'll be keeping this opd entry. */
5082
5083 if (h != NULL)
5084 {
5085 /* Redefine the function descriptor symbol
5086 to this location in the opd section.
5087 We've checked above that opd relocs are
5088 ordered. */
5089 fdh->elf.root.u.def.value = wptr - sec->contents;
5090 }
5091 else
5092 {
5093 /* Local syms are a bit tricky. We could
5094 tweak them as they can be cached, but
5095 we'd need to look through the local syms
5096 for the function descriptor sym which we
5097 don't have at the moment. So keep an
5098 array of adjustments. */
5099 adjust[rel->r_offset / 24] = wptr - rptr;
5100 }
5101
5102 if (wptr != rptr)
5103 memcpy (wptr, rptr, 24);
5104 wptr += 24;
5105 }
5106 rptr += 24;
5107 offset += 24;
5108 }
5109
5110 if (skip)
5111 {
5112 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5113 if (info->shared)
5114 {
5115 /* We won't be needing dynamic relocs here. */
5116 struct ppc_dyn_relocs **pp;
5117 struct ppc_dyn_relocs *p;
5118
5119 if (h != NULL)
5120 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5121 else if (sym_sec != NULL)
5122 pp = ((struct ppc_dyn_relocs **)
5123 &elf_section_data (sym_sec)->local_dynrel);
5124 else
5125 pp = ((struct ppc_dyn_relocs **)
5126 &elf_section_data (sec)->local_dynrel);
5127 while ((p = *pp) != NULL)
5128 {
5129 if (p->sec == sec)
5130 {
5131 p->count -= 1;
5132 if (p->count == 0)
5133 *pp = p->next;
5134 break;
5135 }
5136 pp = &p->next;
5137 }
5138 }
5139 }
5140 else
5141 {
5142 /* We need to adjust any reloc offsets to point to the
5143 new opd entries. While we're at it, we may as well
5144 remove redundant relocs. */
5145 rel->r_offset += wptr - rptr;
5146 if (write_rel != rel)
5147 memcpy (write_rel, rel, sizeof (*rel));
5148 ++write_rel;
5149 }
5150 }
5151
5152 sec->_cooked_size = wptr - sec->contents;
5153 sec->reloc_count = write_rel - relstart;
5154 /* Fudge the size too, as this is used later in
5155 elf_bfd_final_link if we are emitting relocs. */
5156 elf_section_data (sec)->rel_hdr.sh_size
5157 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5158 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5159 }
5160 else if (elf_section_data (sec)->relocs != relstart)
5161 free (relstart);
5162
5163 if (local_syms != NULL
5164 && symtab_hdr->contents != (unsigned char *) local_syms)
5165 {
5166 if (!info->keep_memory)
5167 free (local_syms);
5168 else
5169 symtab_hdr->contents = (unsigned char *) local_syms;
5170 }
5171 }
5172
5173 return TRUE;
5174 }
5175
5176 /* Set htab->tls_sec. */
5177
5178 bfd_boolean
5179 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5180 {
5181 asection *tls;
5182 struct ppc_link_hash_table *htab;
5183
5184 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5185 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5186 == (SEC_THREAD_LOCAL | SEC_LOAD))
5187 break;
5188
5189 htab = ppc_hash_table (info);
5190 htab->tls_sec = tls;
5191
5192 if (htab->tls_get_addr != NULL)
5193 {
5194 struct elf_link_hash_entry *h = htab->tls_get_addr;
5195
5196 while (h->root.type == bfd_link_hash_indirect
5197 || h->root.type == bfd_link_hash_warning)
5198 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5199
5200 htab->tls_get_addr = h;
5201 }
5202
5203 return tls != NULL;
5204 }
5205
5206 /* Run through all the TLS relocs looking for optimization
5207 opportunities. The linker has been hacked (see ppc64elf.em) to do
5208 a preliminary section layout so that we know the TLS segment
5209 offsets. We can't optimize earlier because some optimizations need
5210 to know the tp offset, and we need to optimize before allocating
5211 dynamic relocations. */
5212
5213 bfd_boolean
5214 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5215 {
5216 bfd *ibfd;
5217 asection *sec;
5218 struct ppc_link_hash_table *htab;
5219
5220 if (info->relocatable || info->shared)
5221 return TRUE;
5222
5223 htab = ppc_hash_table (info);
5224 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5225 {
5226 Elf_Internal_Sym *locsyms = NULL;
5227
5228 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5229 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5230 {
5231 Elf_Internal_Rela *relstart, *rel, *relend;
5232 int expecting_tls_get_addr;
5233
5234 /* Read the relocations. */
5235 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5236 info->keep_memory);
5237 if (relstart == NULL)
5238 return FALSE;
5239
5240 expecting_tls_get_addr = 0;
5241 relend = relstart + sec->reloc_count;
5242 for (rel = relstart; rel < relend; rel++)
5243 {
5244 enum elf_ppc64_reloc_type r_type;
5245 unsigned long r_symndx;
5246 struct elf_link_hash_entry *h;
5247 Elf_Internal_Sym *sym;
5248 asection *sym_sec;
5249 char *tls_mask;
5250 char tls_set, tls_clear, tls_type = 0;
5251 bfd_vma value;
5252 bfd_boolean ok_tprel, is_local;
5253
5254 r_symndx = ELF64_R_SYM (rel->r_info);
5255 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5256 r_symndx, ibfd))
5257 {
5258 err_free_rel:
5259 if (elf_section_data (sec)->relocs != relstart)
5260 free (relstart);
5261 if (locsyms != NULL
5262 && (elf_tdata (ibfd)->symtab_hdr.contents
5263 != (unsigned char *) locsyms))
5264 free (locsyms);
5265 return FALSE;
5266 }
5267
5268 if (h != NULL)
5269 {
5270 if (h->root.type != bfd_link_hash_defined
5271 && h->root.type != bfd_link_hash_defweak)
5272 continue;
5273 value = h->root.u.def.value;
5274 }
5275 else
5276 value = sym->st_value;
5277
5278 ok_tprel = FALSE;
5279 is_local = FALSE;
5280 if (h == NULL
5281 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5282 {
5283 is_local = TRUE;
5284 value += sym_sec->output_offset;
5285 value += sym_sec->output_section->vma;
5286 value -= htab->tls_sec->vma;
5287 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5288 < (bfd_vma) 1 << 32);
5289 }
5290
5291 r_type = ELF64_R_TYPE (rel->r_info);
5292 switch (r_type)
5293 {
5294 case R_PPC64_GOT_TLSLD16:
5295 case R_PPC64_GOT_TLSLD16_LO:
5296 case R_PPC64_GOT_TLSLD16_HI:
5297 case R_PPC64_GOT_TLSLD16_HA:
5298 /* These relocs should never be against a symbol
5299 defined in a shared lib. Leave them alone if
5300 that turns out to be the case. */
5301 ppc64_tlsld_got (ibfd)->refcount -= 1;
5302 if (!is_local)
5303 continue;
5304
5305 /* LD -> LE */
5306 tls_set = 0;
5307 tls_clear = TLS_LD;
5308 tls_type = TLS_TLS | TLS_LD;
5309 expecting_tls_get_addr = 1;
5310 break;
5311
5312 case R_PPC64_GOT_TLSGD16:
5313 case R_PPC64_GOT_TLSGD16_LO:
5314 case R_PPC64_GOT_TLSGD16_HI:
5315 case R_PPC64_GOT_TLSGD16_HA:
5316 if (ok_tprel)
5317 /* GD -> LE */
5318 tls_set = 0;
5319 else
5320 /* GD -> IE */
5321 tls_set = TLS_TLS | TLS_TPRELGD;
5322 tls_clear = TLS_GD;
5323 tls_type = TLS_TLS | TLS_GD;
5324 expecting_tls_get_addr = 1;
5325 break;
5326
5327 case R_PPC64_GOT_TPREL16_DS:
5328 case R_PPC64_GOT_TPREL16_LO_DS:
5329 case R_PPC64_GOT_TPREL16_HI:
5330 case R_PPC64_GOT_TPREL16_HA:
5331 expecting_tls_get_addr = 0;
5332 if (ok_tprel)
5333 {
5334 /* IE -> LE */
5335 tls_set = 0;
5336 tls_clear = TLS_TPREL;
5337 tls_type = TLS_TLS | TLS_TPREL;
5338 break;
5339 }
5340 else
5341 continue;
5342
5343 case R_PPC64_REL14:
5344 case R_PPC64_REL14_BRTAKEN:
5345 case R_PPC64_REL14_BRNTAKEN:
5346 case R_PPC64_REL24:
5347 if (h != NULL
5348 && h == htab->tls_get_addr)
5349 {
5350 if (!expecting_tls_get_addr
5351 && rel != relstart
5352 && ((ELF64_R_TYPE (rel[-1].r_info)
5353 == R_PPC64_TOC16)
5354 || (ELF64_R_TYPE (rel[-1].r_info)
5355 == R_PPC64_TOC16_LO)))
5356 {
5357 /* Check for toc tls entries. */
5358 char *toc_tls;
5359 int retval;
5360
5361 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5362 rel - 1, ibfd);
5363 if (retval == 0)
5364 goto err_free_rel;
5365 if (toc_tls != NULL)
5366 expecting_tls_get_addr = retval > 1;
5367 }
5368
5369 if (expecting_tls_get_addr)
5370 {
5371 struct plt_entry *ent;
5372 for (ent = h->plt.plist; ent; ent = ent->next)
5373 if (ent->addend == 0)
5374 {
5375 if (ent->plt.refcount > 0)
5376 ent->plt.refcount -= 1;
5377 break;
5378 }
5379 }
5380 }
5381 expecting_tls_get_addr = 0;
5382 continue;
5383
5384 case R_PPC64_TPREL64:
5385 expecting_tls_get_addr = 0;
5386 if (ok_tprel)
5387 {
5388 /* IE -> LE */
5389 tls_set = TLS_EXPLICIT;
5390 tls_clear = TLS_TPREL;
5391 break;
5392 }
5393 else
5394 continue;
5395
5396 case R_PPC64_DTPMOD64:
5397 expecting_tls_get_addr = 0;
5398 if (rel + 1 < relend
5399 && (rel[1].r_info
5400 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5401 && rel[1].r_offset == rel->r_offset + 8)
5402 {
5403 if (ok_tprel)
5404 /* GD -> LE */
5405 tls_set = TLS_EXPLICIT | TLS_GD;
5406 else
5407 /* GD -> IE */
5408 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5409 tls_clear = TLS_GD;
5410 }
5411 else
5412 {
5413 if (!is_local)
5414 continue;
5415
5416 /* LD -> LE */
5417 tls_set = TLS_EXPLICIT;
5418 tls_clear = TLS_LD;
5419 }
5420 break;
5421
5422 default:
5423 expecting_tls_get_addr = 0;
5424 continue;
5425 }
5426
5427 if ((tls_set & TLS_EXPLICIT) == 0)
5428 {
5429 struct got_entry *ent;
5430
5431 /* Adjust got entry for this reloc. */
5432 if (h != NULL)
5433 ent = h->got.glist;
5434 else
5435 ent = elf_local_got_ents (ibfd)[r_symndx];
5436
5437 for (; ent != NULL; ent = ent->next)
5438 if (ent->addend == rel->r_addend
5439 && ent->owner == ibfd
5440 && ent->tls_type == tls_type)
5441 break;
5442 if (ent == NULL)
5443 abort ();
5444
5445 if (tls_set == 0)
5446 {
5447 /* We managed to get rid of a got entry. */
5448 if (ent->got.refcount > 0)
5449 ent->got.refcount -= 1;
5450 }
5451 }
5452 else if (h != NULL)
5453 {
5454 struct ppc_link_hash_entry * eh;
5455 struct ppc_dyn_relocs **pp;
5456 struct ppc_dyn_relocs *p;
5457
5458 /* Adjust dynamic relocs. */
5459 eh = (struct ppc_link_hash_entry *) h;
5460 for (pp = &eh->dyn_relocs;
5461 (p = *pp) != NULL;
5462 pp = &p->next)
5463 if (p->sec == sec)
5464 {
5465 /* If we got rid of a DTPMOD/DTPREL reloc
5466 pair then we'll lose one or two dyn
5467 relocs. */
5468 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5469 p->count -= 1;
5470 p->count -= 1;
5471 if (p->count == 0)
5472 *pp = p->next;
5473 break;
5474 }
5475 }
5476
5477 *tls_mask |= tls_set;
5478 *tls_mask &= ~tls_clear;
5479 }
5480
5481 if (elf_section_data (sec)->relocs != relstart)
5482 free (relstart);
5483 }
5484
5485 if (locsyms != NULL
5486 && (elf_tdata (ibfd)->symtab_hdr.contents
5487 != (unsigned char *) locsyms))
5488 {
5489 if (!info->keep_memory)
5490 free (locsyms);
5491 else
5492 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5493 }
5494 }
5495 return TRUE;
5496 }
5497
5498 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5499 will be called from elflink.h. If elflink.h doesn't call our
5500 finish_dynamic_symbol routine, we'll need to do something about
5501 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5502 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5503 ((DYN) \
5504 && ((SHARED) \
5505 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5506 && ((H)->dynindx != -1 \
5507 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5508
5509 /* Allocate space in .plt, .got and associated reloc sections for
5510 dynamic relocs. */
5511
5512 static bfd_boolean
5513 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5514 {
5515 struct bfd_link_info *info;
5516 struct ppc_link_hash_table *htab;
5517 asection *s;
5518 struct ppc_link_hash_entry *eh;
5519 struct ppc_dyn_relocs *p;
5520 struct got_entry *gent;
5521
5522 if (h->root.type == bfd_link_hash_indirect)
5523 return TRUE;
5524
5525 if (h->root.type == bfd_link_hash_warning)
5526 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5527
5528 info = (struct bfd_link_info *) inf;
5529 htab = ppc_hash_table (info);
5530
5531 if (htab->elf.dynamic_sections_created
5532 && h->dynindx != -1
5533 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5534 {
5535 struct plt_entry *pent;
5536 bfd_boolean doneone = FALSE;
5537 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5538 if (pent->plt.refcount > 0)
5539 {
5540 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5541
5542 /* If this is the first .plt entry, make room for the special
5543 first entry. */
5544 s = htab->plt;
5545 if (s->_raw_size == 0)
5546 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5547
5548 pent->plt.offset = s->_raw_size;
5549
5550 /* Make room for this entry. */
5551 s->_raw_size += PLT_ENTRY_SIZE;
5552
5553 /* Make room for the .glink code. */
5554 s = htab->glink;
5555 if (s->_raw_size == 0)
5556 s->_raw_size += GLINK_CALL_STUB_SIZE;
5557 /* We need bigger stubs past index 32767. */
5558 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5559 s->_raw_size += 4;
5560 s->_raw_size += 2*4;
5561
5562 /* We also need to make an entry in the .rela.plt section. */
5563 s = htab->relplt;
5564 s->_raw_size += sizeof (Elf64_External_Rela);
5565 doneone = TRUE;
5566 }
5567 else
5568 pent->plt.offset = (bfd_vma) -1;
5569 if (!doneone)
5570 {
5571 h->plt.plist = NULL;
5572 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5573 }
5574 }
5575 else
5576 {
5577 h->plt.plist = NULL;
5578 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5579 }
5580
5581 eh = (struct ppc_link_hash_entry *) h;
5582 /* Run through the TLS GD got entries first if we're changing them
5583 to TPREL. */
5584 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5585 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5586 if (gent->got.refcount > 0
5587 && (gent->tls_type & TLS_GD) != 0)
5588 {
5589 /* This was a GD entry that has been converted to TPREL. If
5590 there happens to be a TPREL entry we can use that one. */
5591 struct got_entry *ent;
5592 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5593 if (ent->got.refcount > 0
5594 && (ent->tls_type & TLS_TPREL) != 0
5595 && ent->addend == gent->addend
5596 && ent->owner == gent->owner)
5597 {
5598 gent->got.refcount = 0;
5599 break;
5600 }
5601
5602 /* If not, then we'll be using our own TPREL entry. */
5603 if (gent->got.refcount != 0)
5604 gent->tls_type = TLS_TLS | TLS_TPREL;
5605 }
5606
5607 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5608 if (gent->got.refcount > 0)
5609 {
5610 bfd_boolean dyn;
5611
5612 /* Make sure this symbol is output as a dynamic symbol.
5613 Undefined weak syms won't yet be marked as dynamic,
5614 nor will all TLS symbols. */
5615 if (h->dynindx == -1
5616 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5617 {
5618 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5619 return FALSE;
5620 }
5621
5622 if ((gent->tls_type & TLS_LD) != 0
5623 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5624 {
5625 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5626 continue;
5627 }
5628
5629 s = ppc64_elf_tdata (gent->owner)->got;
5630 gent->got.offset = s->_raw_size;
5631 s->_raw_size
5632 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5633 dyn = htab->elf.dynamic_sections_created;
5634 if ((info->shared
5635 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5636 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5637 || h->root.type != bfd_link_hash_undefweak))
5638 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5639 += (gent->tls_type & eh->tls_mask & TLS_GD
5640 ? 2 * sizeof (Elf64_External_Rela)
5641 : sizeof (Elf64_External_Rela));
5642 }
5643 else
5644 gent->got.offset = (bfd_vma) -1;
5645
5646 if (eh->dyn_relocs == NULL)
5647 return TRUE;
5648
5649 /* In the shared -Bsymbolic case, discard space allocated for
5650 dynamic pc-relative relocs against symbols which turn out to be
5651 defined in regular objects. For the normal shared case, discard
5652 space for relocs that have become local due to symbol visibility
5653 changes. */
5654
5655 if (info->shared)
5656 {
5657 /* Relocs that use pc_count are those that appear on a call insn,
5658 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5659 generated via assembly. We want calls to protected symbols to
5660 resolve directly to the function rather than going via the plt.
5661 If people want function pointer comparisons to work as expected
5662 then they should avoid writing weird assembly. */
5663 if (SYMBOL_CALLS_LOCAL (info, h))
5664 {
5665 struct ppc_dyn_relocs **pp;
5666
5667 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5668 {
5669 p->count -= p->pc_count;
5670 p->pc_count = 0;
5671 if (p->count == 0)
5672 *pp = p->next;
5673 else
5674 pp = &p->next;
5675 }
5676 }
5677
5678 /* Also discard relocs on undefined weak syms with non-default
5679 visibility. */
5680 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5681 && h->root.type == bfd_link_hash_undefweak)
5682 eh->dyn_relocs = NULL;
5683 }
5684 else if (ELIMINATE_COPY_RELOCS)
5685 {
5686 /* For the non-shared case, discard space for relocs against
5687 symbols which turn out to need copy relocs or are not
5688 dynamic. */
5689
5690 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5691 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5692 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5693 {
5694 /* Make sure this symbol is output as a dynamic symbol.
5695 Undefined weak syms won't yet be marked as dynamic. */
5696 if (h->dynindx == -1
5697 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5698 {
5699 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5700 return FALSE;
5701 }
5702
5703 /* If that succeeded, we know we'll be keeping all the
5704 relocs. */
5705 if (h->dynindx != -1)
5706 goto keep;
5707 }
5708
5709 eh->dyn_relocs = NULL;
5710
5711 keep: ;
5712 }
5713
5714 /* Finally, allocate space. */
5715 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5716 {
5717 asection *sreloc = elf_section_data (p->sec)->sreloc;
5718 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5719 }
5720
5721 return TRUE;
5722 }
5723
5724 /* Find any dynamic relocs that apply to read-only sections. */
5725
5726 static bfd_boolean
5727 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5728 {
5729 struct ppc_link_hash_entry *eh;
5730 struct ppc_dyn_relocs *p;
5731
5732 if (h->root.type == bfd_link_hash_warning)
5733 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5734
5735 eh = (struct ppc_link_hash_entry *) h;
5736 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5737 {
5738 asection *s = p->sec->output_section;
5739
5740 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5741 {
5742 struct bfd_link_info *info = inf;
5743
5744 info->flags |= DF_TEXTREL;
5745
5746 /* Not an error, just cut short the traversal. */
5747 return FALSE;
5748 }
5749 }
5750 return TRUE;
5751 }
5752
5753 /* Set the sizes of the dynamic sections. */
5754
5755 static bfd_boolean
5756 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5757 struct bfd_link_info *info)
5758 {
5759 struct ppc_link_hash_table *htab;
5760 bfd *dynobj;
5761 asection *s;
5762 bfd_boolean relocs;
5763 bfd *ibfd;
5764
5765 htab = ppc_hash_table (info);
5766 dynobj = htab->elf.dynobj;
5767 if (dynobj == NULL)
5768 abort ();
5769
5770 if (htab->elf.dynamic_sections_created)
5771 {
5772 /* Set the contents of the .interp section to the interpreter. */
5773 if (info->executable)
5774 {
5775 s = bfd_get_section_by_name (dynobj, ".interp");
5776 if (s == NULL)
5777 abort ();
5778 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5779 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5780 }
5781 }
5782
5783 /* Set up .got offsets for local syms, and space for local dynamic
5784 relocs. */
5785 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5786 {
5787 struct got_entry **lgot_ents;
5788 struct got_entry **end_lgot_ents;
5789 char *lgot_masks;
5790 bfd_size_type locsymcount;
5791 Elf_Internal_Shdr *symtab_hdr;
5792 asection *srel;
5793
5794 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5795 continue;
5796
5797 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5798 {
5799 s = ppc64_elf_tdata (ibfd)->got;
5800 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5801 s->_raw_size += 16;
5802 if (info->shared)
5803 {
5804 srel = ppc64_elf_tdata (ibfd)->relgot;
5805 srel->_raw_size += sizeof (Elf64_External_Rela);
5806 }
5807 }
5808 else
5809 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5810
5811 for (s = ibfd->sections; s != NULL; s = s->next)
5812 {
5813 struct ppc_dyn_relocs *p;
5814
5815 for (p = *((struct ppc_dyn_relocs **)
5816 &elf_section_data (s)->local_dynrel);
5817 p != NULL;
5818 p = p->next)
5819 {
5820 if (!bfd_is_abs_section (p->sec)
5821 && bfd_is_abs_section (p->sec->output_section))
5822 {
5823 /* Input section has been discarded, either because
5824 it is a copy of a linkonce section or due to
5825 linker script /DISCARD/, so we'll be discarding
5826 the relocs too. */
5827 }
5828 else if (p->count != 0)
5829 {
5830 srel = elf_section_data (p->sec)->sreloc;
5831 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5832 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5833 info->flags |= DF_TEXTREL;
5834 }
5835 }
5836 }
5837
5838 lgot_ents = elf_local_got_ents (ibfd);
5839 if (!lgot_ents)
5840 continue;
5841
5842 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5843 locsymcount = symtab_hdr->sh_info;
5844 end_lgot_ents = lgot_ents + locsymcount;
5845 lgot_masks = (char *) end_lgot_ents;
5846 s = ppc64_elf_tdata (ibfd)->got;
5847 srel = ppc64_elf_tdata (ibfd)->relgot;
5848 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5849 {
5850 struct got_entry *ent;
5851
5852 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5853 if (ent->got.refcount > 0)
5854 {
5855 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5856 {
5857 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5858 {
5859 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5860 s->_raw_size += 16;
5861 if (info->shared)
5862 srel->_raw_size += sizeof (Elf64_External_Rela);
5863 }
5864 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5865 }
5866 else
5867 {
5868 ent->got.offset = s->_raw_size;
5869 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5870 {
5871 s->_raw_size += 16;
5872 if (info->shared)
5873 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5874 }
5875 else
5876 {
5877 s->_raw_size += 8;
5878 if (info->shared)
5879 srel->_raw_size += sizeof (Elf64_External_Rela);
5880 }
5881 }
5882 }
5883 else
5884 ent->got.offset = (bfd_vma) -1;
5885 }
5886 }
5887
5888 /* Allocate global sym .plt and .got entries, and space for global
5889 sym dynamic relocs. */
5890 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5891
5892 /* We now have determined the sizes of the various dynamic sections.
5893 Allocate memory for them. */
5894 relocs = FALSE;
5895 for (s = dynobj->sections; s != NULL; s = s->next)
5896 {
5897 if ((s->flags & SEC_LINKER_CREATED) == 0)
5898 continue;
5899
5900 /* Reset _cooked_size since prelim layout will set it wrongly,
5901 and a non-zero _cooked_size sticks. */
5902 s->_cooked_size = 0;
5903
5904 if (s == htab->brlt || s == htab->relbrlt)
5905 /* These haven't been allocated yet; don't strip. */
5906 continue;
5907 else if (s == htab->got
5908 || s == htab->plt
5909 || s == htab->glink)
5910 {
5911 /* Strip this section if we don't need it; see the
5912 comment below. */
5913 }
5914 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5915 {
5916 if (s->_raw_size == 0)
5917 {
5918 /* If we don't need this section, strip it from the
5919 output file. This is mostly to handle .rela.bss and
5920 .rela.plt. We must create both sections in
5921 create_dynamic_sections, because they must be created
5922 before the linker maps input sections to output
5923 sections. The linker does that before
5924 adjust_dynamic_symbol is called, and it is that
5925 function which decides whether anything needs to go
5926 into these sections. */
5927 }
5928 else
5929 {
5930 if (s != htab->relplt)
5931 relocs = TRUE;
5932
5933 /* We use the reloc_count field as a counter if we need
5934 to copy relocs into the output file. */
5935 s->reloc_count = 0;
5936 }
5937 }
5938 else
5939 {
5940 /* It's not one of our sections, so don't allocate space. */
5941 continue;
5942 }
5943
5944 if (s->_raw_size == 0)
5945 {
5946 _bfd_strip_section_from_output (info, s);
5947 continue;
5948 }
5949
5950 /* .plt is in the bss section. We don't initialise it. */
5951 if ((s->flags & SEC_LOAD) == 0)
5952 continue;
5953
5954 /* Allocate memory for the section contents. We use bfd_zalloc
5955 here in case unused entries are not reclaimed before the
5956 section's contents are written out. This should not happen,
5957 but this way if it does we get a R_PPC64_NONE reloc in .rela
5958 sections instead of garbage.
5959 We also rely on the section contents being zero when writing
5960 the GOT. */
5961 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5962 if (s->contents == NULL)
5963 return FALSE;
5964 }
5965
5966 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5967 {
5968 s = ppc64_elf_tdata (ibfd)->got;
5969 if (s != NULL && s != htab->got)
5970 {
5971 s->_cooked_size = 0;
5972 if (s->_raw_size == 0)
5973 _bfd_strip_section_from_output (info, s);
5974 else
5975 {
5976 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5977 if (s->contents == NULL)
5978 return FALSE;
5979 }
5980 }
5981 s = ppc64_elf_tdata (ibfd)->relgot;
5982 if (s != NULL)
5983 {
5984 s->_cooked_size = 0;
5985 if (s->_raw_size == 0)
5986 _bfd_strip_section_from_output (info, s);
5987 else
5988 {
5989 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5990 if (s->contents == NULL)
5991 return FALSE;
5992 relocs = TRUE;
5993 s->reloc_count = 0;
5994 }
5995 }
5996 }
5997
5998 if (htab->elf.dynamic_sections_created)
5999 {
6000 /* Add some entries to the .dynamic section. We fill in the
6001 values later, in ppc64_elf_finish_dynamic_sections, but we
6002 must add the entries now so that we get the correct size for
6003 the .dynamic section. The DT_DEBUG entry is filled in by the
6004 dynamic linker and used by the debugger. */
6005 #define add_dynamic_entry(TAG, VAL) \
6006 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
6007
6008 if (info->executable)
6009 {
6010 if (!add_dynamic_entry (DT_DEBUG, 0))
6011 return FALSE;
6012 }
6013
6014 if (htab->plt != NULL && htab->plt->_raw_size != 0)
6015 {
6016 if (!add_dynamic_entry (DT_PLTGOT, 0)
6017 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6018 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6019 || !add_dynamic_entry (DT_JMPREL, 0)
6020 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6021 return FALSE;
6022 }
6023
6024 if (NO_OPD_RELOCS)
6025 {
6026 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6027 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6028 return FALSE;
6029 }
6030
6031 if (relocs)
6032 {
6033 if (!add_dynamic_entry (DT_RELA, 0)
6034 || !add_dynamic_entry (DT_RELASZ, 0)
6035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6036 return FALSE;
6037
6038 /* If any dynamic relocs apply to a read-only section,
6039 then we need a DT_TEXTREL entry. */
6040 if ((info->flags & DF_TEXTREL) == 0)
6041 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6042
6043 if ((info->flags & DF_TEXTREL) != 0)
6044 {
6045 if (!add_dynamic_entry (DT_TEXTREL, 0))
6046 return FALSE;
6047 }
6048 }
6049 }
6050 #undef add_dynamic_entry
6051
6052 return TRUE;
6053 }
6054
6055 /* Determine the type of stub needed, if any, for a call. */
6056
6057 static inline enum ppc_stub_type
6058 ppc_type_of_stub (asection *input_sec,
6059 const Elf_Internal_Rela *rel,
6060 struct ppc_link_hash_entry **hash,
6061 bfd_vma destination)
6062 {
6063 struct ppc_link_hash_entry *h = *hash;
6064 bfd_vma location;
6065 bfd_vma branch_offset;
6066 bfd_vma max_branch_offset;
6067 enum elf_ppc64_reloc_type r_type;
6068
6069 if (h != NULL)
6070 {
6071 if (h->oh != NULL
6072 && h->oh->dynindx != -1)
6073 {
6074 struct plt_entry *ent;
6075 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6076 if (ent->addend == rel->r_addend
6077 && ent->plt.offset != (bfd_vma) -1)
6078 {
6079 *hash = (struct ppc_link_hash_entry *) h->oh;
6080 return ppc_stub_plt_call;
6081 }
6082 }
6083
6084 if (h->elf.root.type != bfd_link_hash_defined
6085 && h->elf.root.type != bfd_link_hash_defweak)
6086 return ppc_stub_none;
6087 }
6088
6089 /* Determine where the call point is. */
6090 location = (input_sec->output_offset
6091 + input_sec->output_section->vma
6092 + rel->r_offset);
6093
6094 branch_offset = destination - location;
6095 r_type = ELF64_R_TYPE (rel->r_info);
6096
6097 /* Determine if a long branch stub is needed. */
6098 max_branch_offset = 1 << 25;
6099 if (r_type != R_PPC64_REL24)
6100 max_branch_offset = 1 << 15;
6101
6102 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6103 /* We need a stub. Figure out whether a long_branch or plt_branch
6104 is needed later. */
6105 return ppc_stub_long_branch;
6106
6107 return ppc_stub_none;
6108 }
6109
6110 /* Build a .plt call stub. */
6111
6112 static inline bfd_byte *
6113 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6114 {
6115 #define PPC_LO(v) ((v) & 0xffff)
6116 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6117 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6118
6119 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6120 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6121 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6122 if (PPC_HA (offset + 8) != PPC_HA (offset))
6123 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6124 offset += 8;
6125 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6126 if (PPC_HA (offset + 8) != PPC_HA (offset))
6127 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6128 offset += 8;
6129 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6130 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6131 bfd_put_32 (obfd, BCTR, p), p += 4;
6132 return p;
6133 }
6134
6135 static bfd_boolean
6136 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6137 {
6138 struct ppc_stub_hash_entry *stub_entry;
6139 struct ppc_branch_hash_entry *br_entry;
6140 struct bfd_link_info *info;
6141 struct ppc_link_hash_table *htab;
6142 bfd_byte *loc;
6143 bfd_byte *p;
6144 unsigned int indx;
6145 struct plt_entry *ent;
6146 bfd_vma off;
6147 int size;
6148
6149 /* Massage our args to the form they really have. */
6150 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6151 info = in_arg;
6152
6153 htab = ppc_hash_table (info);
6154
6155 /* Make a note of the offset within the stubs for this entry. */
6156 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6157 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6158
6159 htab->stub_count[stub_entry->stub_type - 1] += 1;
6160 switch (stub_entry->stub_type)
6161 {
6162 case ppc_stub_long_branch:
6163 case ppc_stub_long_branch_r2off:
6164 /* Branches are relative. This is where we are going to. */
6165 off = (stub_entry->target_value
6166 + stub_entry->target_section->output_offset
6167 + stub_entry->target_section->output_section->vma);
6168
6169 /* And this is where we are coming from. */
6170 off -= (stub_entry->stub_offset
6171 + stub_entry->stub_sec->output_offset
6172 + stub_entry->stub_sec->output_section->vma);
6173
6174 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6175 size = 4;
6176 else
6177 {
6178 bfd_vma r2off;
6179
6180 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6181 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6182 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6183 loc += 4;
6184 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6185 loc += 4;
6186 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6187 loc += 4;
6188 off -= 12;
6189 size = 16;
6190 }
6191 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6192
6193 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6194 break;
6195
6196 case ppc_stub_plt_branch:
6197 case ppc_stub_plt_branch_r2off:
6198 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6199 stub_entry->root.string + 9,
6200 FALSE, FALSE);
6201 if (br_entry == NULL)
6202 {
6203 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6204 stub_entry->root.string + 9);
6205 htab->stub_error = TRUE;
6206 return FALSE;
6207 }
6208
6209 off = (stub_entry->target_value
6210 + stub_entry->target_section->output_offset
6211 + stub_entry->target_section->output_section->vma);
6212
6213 bfd_put_64 (htab->brlt->owner, off,
6214 htab->brlt->contents + br_entry->offset);
6215
6216 if (info->shared)
6217 {
6218 /* Create a reloc for the branch lookup table entry. */
6219 Elf_Internal_Rela rela;
6220 bfd_byte *rl;
6221
6222 rela.r_offset = (br_entry->offset
6223 + htab->brlt->output_offset
6224 + htab->brlt->output_section->vma);
6225 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6226 rela.r_addend = off;
6227
6228 rl = htab->relbrlt->contents;
6229 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6230 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6231 }
6232
6233 off = (br_entry->offset
6234 + htab->brlt->output_offset
6235 + htab->brlt->output_section->vma
6236 - elf_gp (htab->brlt->output_section->owner)
6237 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6238
6239 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6240 {
6241 (*_bfd_error_handler)
6242 (_("linkage table error against `%s'"),
6243 stub_entry->root.string);
6244 bfd_set_error (bfd_error_bad_value);
6245 htab->stub_error = TRUE;
6246 return FALSE;
6247 }
6248
6249 indx = off;
6250 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6251 {
6252 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6253 loc += 4;
6254 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6255 size = 16;
6256 }
6257 else
6258 {
6259 bfd_vma r2off;
6260
6261 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6262 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6263 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6264 loc += 4;
6265 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6266 loc += 4;
6267 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6268 loc += 4;
6269 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6270 loc += 4;
6271 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6272 size = 28;
6273 }
6274 loc += 4;
6275 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6276 loc += 4;
6277 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6278 break;
6279
6280 case ppc_stub_plt_call:
6281 /* Do the best we can for shared libraries built without
6282 exporting ".foo" for each "foo". This can happen when symbol
6283 versioning scripts strip all bar a subset of symbols. */
6284 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6285 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6286 {
6287 /* Point the symbol at the stub. There may be multiple stubs,
6288 we don't really care; The main thing is to make this sym
6289 defined somewhere. Maybe defining the symbol in the stub
6290 section is a silly idea. If we didn't do this, htab->top_id
6291 could disappear. */
6292 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6293 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6294 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6295 }
6296
6297 /* Now build the stub. */
6298 off = (bfd_vma) -1;
6299 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6300 if (ent->addend == stub_entry->addend)
6301 {
6302 off = ent->plt.offset;
6303 break;
6304 }
6305 if (off >= (bfd_vma) -2)
6306 abort ();
6307
6308 off &= ~ (bfd_vma) 1;
6309 off += (htab->plt->output_offset
6310 + htab->plt->output_section->vma
6311 - elf_gp (htab->plt->output_section->owner)
6312 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6313
6314 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6315 {
6316 (*_bfd_error_handler)
6317 (_("linkage table error against `%s'"),
6318 stub_entry->h->elf.root.root.string);
6319 bfd_set_error (bfd_error_bad_value);
6320 htab->stub_error = TRUE;
6321 return FALSE;
6322 }
6323
6324 p = build_plt_stub (htab->stub_bfd, loc, off);
6325 size = p - loc;
6326 break;
6327
6328 default:
6329 BFD_FAIL ();
6330 return FALSE;
6331 }
6332
6333 stub_entry->stub_sec->_cooked_size += size;
6334
6335 if (htab->emit_stub_syms
6336 && !(stub_entry->stub_type == ppc_stub_plt_call
6337 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6338 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6339 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6340 {
6341 struct elf_link_hash_entry *h;
6342 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6343 TRUE, FALSE, FALSE);
6344 if (h == NULL)
6345 return FALSE;
6346 if (h->root.type == bfd_link_hash_new)
6347 {
6348 h->root.type = bfd_link_hash_defined;
6349 h->root.u.def.section = stub_entry->stub_sec;
6350 h->root.u.def.value = stub_entry->stub_offset;
6351 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6352 | ELF_LINK_HASH_DEF_REGULAR
6353 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6354 | ELF_LINK_FORCED_LOCAL);
6355 }
6356 }
6357
6358 return TRUE;
6359 }
6360
6361 /* As above, but don't actually build the stub. Just bump offset so
6362 we know stub section sizes, and select plt_branch stubs where
6363 long_branch stubs won't do. */
6364
6365 static bfd_boolean
6366 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6367 {
6368 struct ppc_stub_hash_entry *stub_entry;
6369 struct ppc_link_hash_table *htab;
6370 bfd_vma off;
6371 int size;
6372
6373 /* Massage our args to the form they really have. */
6374 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6375 htab = in_arg;
6376
6377 if (stub_entry->stub_type == ppc_stub_plt_call)
6378 {
6379 struct plt_entry *ent;
6380 off = (bfd_vma) -1;
6381 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6382 if (ent->addend == stub_entry->addend)
6383 {
6384 off = ent->plt.offset & ~(bfd_vma) 1;
6385 break;
6386 }
6387 if (off >= (bfd_vma) -2)
6388 abort ();
6389 off += (htab->plt->output_offset
6390 + htab->plt->output_section->vma
6391 - elf_gp (htab->plt->output_section->owner)
6392 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6393
6394 size = PLT_CALL_STUB_SIZE;
6395 if (PPC_HA (off + 16) != PPC_HA (off))
6396 size += 4;
6397 }
6398 else
6399 {
6400 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6401 variants. */
6402 off = (stub_entry->target_value
6403 + stub_entry->target_section->output_offset
6404 + stub_entry->target_section->output_section->vma);
6405 off -= (stub_entry->stub_sec->_raw_size
6406 + stub_entry->stub_sec->output_offset
6407 + stub_entry->stub_sec->output_section->vma);
6408
6409 /* Reset the stub type from the plt variant in case we now
6410 can reach with a shorter stub. */
6411 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6412 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6413
6414 size = 4;
6415 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6416 {
6417 off -= 12;
6418 size = 16;
6419 }
6420
6421 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6422 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6423 {
6424 struct ppc_branch_hash_entry *br_entry;
6425
6426 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6427 stub_entry->root.string + 9,
6428 TRUE, FALSE);
6429 if (br_entry == NULL)
6430 {
6431 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6432 stub_entry->root.string + 9);
6433 htab->stub_error = TRUE;
6434 return FALSE;
6435 }
6436
6437 if (br_entry->iter != htab->stub_iteration)
6438 {
6439 br_entry->iter = htab->stub_iteration;
6440 br_entry->offset = htab->brlt->_raw_size;
6441 htab->brlt->_raw_size += 8;
6442 }
6443
6444 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6445 size = 16;
6446 if (stub_entry->stub_type != ppc_stub_plt_branch)
6447 size = 28;
6448 }
6449 }
6450
6451 stub_entry->stub_sec->_raw_size += size;
6452 return TRUE;
6453 }
6454
6455 /* Set up various things so that we can make a list of input sections
6456 for each output section included in the link. Returns -1 on error,
6457 0 when no stubs will be needed, and 1 on success. */
6458
6459 int
6460 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6461 {
6462 bfd *input_bfd;
6463 int top_id, top_index, id;
6464 asection *section;
6465 asection **input_list;
6466 bfd_size_type amt;
6467 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6468
6469 if (htab->brlt == NULL)
6470 return 0;
6471
6472 /* Find the top input section id. */
6473 for (input_bfd = info->input_bfds, top_id = 3;
6474 input_bfd != NULL;
6475 input_bfd = input_bfd->link_next)
6476 {
6477 for (section = input_bfd->sections;
6478 section != NULL;
6479 section = section->next)
6480 {
6481 if (top_id < section->id)
6482 top_id = section->id;
6483 }
6484 }
6485
6486 htab->top_id = top_id;
6487 amt = sizeof (struct map_stub) * (top_id + 1);
6488 htab->stub_group = bfd_zmalloc (amt);
6489 if (htab->stub_group == NULL)
6490 return -1;
6491
6492 /* Set toc_off for com, und, abs and ind sections. */
6493 for (id = 0; id < 3; id++)
6494 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6495
6496 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6497
6498 /* We can't use output_bfd->section_count here to find the top output
6499 section index as some sections may have been removed, and
6500 _bfd_strip_section_from_output doesn't renumber the indices. */
6501 for (section = output_bfd->sections, top_index = 0;
6502 section != NULL;
6503 section = section->next)
6504 {
6505 if (top_index < section->index)
6506 top_index = section->index;
6507 }
6508
6509 htab->top_index = top_index;
6510 amt = sizeof (asection *) * (top_index + 1);
6511 input_list = bfd_zmalloc (amt);
6512 htab->input_list = input_list;
6513 if (input_list == NULL)
6514 return -1;
6515
6516 return 1;
6517 }
6518
6519 /* The linker repeatedly calls this function for each TOC input section
6520 and linker generated GOT section. Group input bfds such that the toc
6521 within a group is less than 64k in size. Will break with cute linker
6522 scripts that play games with dot in the output toc section. */
6523
6524 void
6525 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6526 {
6527 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6528
6529 if (!htab->no_multi_toc)
6530 {
6531 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6532 bfd_vma off = addr - htab->toc_curr;
6533 if (off + isec->_raw_size > 0x10000)
6534 {
6535 htab->toc_curr = addr;
6536 htab->multi_toc_needed = 1;
6537 }
6538 elf_gp (isec->owner) = (htab->toc_curr
6539 - elf_gp (isec->output_section->owner)
6540 + TOC_BASE_OFF);
6541 }
6542 }
6543
6544 /* Called after the last call to the above function. */
6545
6546 void
6547 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6548 struct bfd_link_info *info)
6549 {
6550 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6551
6552 /* toc_curr tracks the TOC offset used for code sections below in
6553 ppc64_elf_next_input_section. Start off at 0x8000. */
6554 htab->toc_curr = TOC_BASE_OFF;
6555 }
6556
6557 /* No toc references were found in ISEC. If the code in ISEC makes no
6558 calls, then there's no need to use toc adjusting stubs when branching
6559 into ISEC. Actually, indirect calls from ISEC are OK as they will
6560 load r2. */
6561
6562 static int
6563 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6564 {
6565 bfd_byte *contents;
6566 bfd_size_type i;
6567 int ret;
6568 int branch_ok;
6569
6570 /* We know none of our code bearing sections will need toc stubs. */
6571 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6572 return 0;
6573
6574 /* Hack for linux kernel. .fixup contains branches, but only back to
6575 the function that hit an exception. */
6576 branch_ok = strcmp (isec->name, ".fixup") == 0;
6577
6578 contents = elf_section_data (isec)->this_hdr.contents;
6579 if (contents == NULL)
6580 {
6581 contents = bfd_malloc (isec->_raw_size);
6582 if (contents == NULL)
6583 return -1;
6584 if (! bfd_get_section_contents (isec->owner, isec, contents,
6585 0, isec->_raw_size))
6586 {
6587 free (contents);
6588 return -1;
6589 }
6590 if (info->keep_memory)
6591 elf_section_data (isec)->this_hdr.contents = contents;
6592 }
6593
6594 /* Code scan, because we don't necessarily have relocs on calls to
6595 static functions. */
6596 ret = 0;
6597 for (i = 0; i < isec->_raw_size; i += 4)
6598 {
6599 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6600 /* Is this a branch? */
6601 if ((insn & (0x3f << 26)) == (18 << 26)
6602 /* If branch and link, it's a function call. */
6603 && ((insn & 1) != 0
6604 /* Sibling calls use a plain branch. I don't know a way
6605 of deciding whether a branch is really a sibling call. */
6606 || !branch_ok))
6607 {
6608 ret = 1;
6609 break;
6610 }
6611 }
6612
6613 if (elf_section_data (isec)->this_hdr.contents != contents)
6614 free (contents);
6615 return ret;
6616 }
6617
6618 /* The linker repeatedly calls this function for each input section,
6619 in the order that input sections are linked into output sections.
6620 Build lists of input sections to determine groupings between which
6621 we may insert linker stubs. */
6622
6623 bfd_boolean
6624 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6625 {
6626 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6627 int ret;
6628
6629 if ((isec->output_section->flags & SEC_CODE) != 0
6630 && isec->output_section->index <= htab->top_index)
6631 {
6632 asection **list = htab->input_list + isec->output_section->index;
6633 /* Steal the link_sec pointer for our list. */
6634 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6635 /* This happens to make the list in reverse order,
6636 which is what we want. */
6637 PREV_SEC (isec) = *list;
6638 *list = isec;
6639 }
6640
6641 /* If a code section has a function that uses the TOC then we need
6642 to use the right TOC (obviously). Also, make sure that .opd gets
6643 the correct TOC value for R_PPC64_TOC relocs that don't have or
6644 can't find their function symbol (shouldn't ever happen now). */
6645 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6646 {
6647 if (elf_gp (isec->owner) != 0)
6648 htab->toc_curr = elf_gp (isec->owner);
6649 }
6650 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6651 return FALSE;
6652 else
6653 isec->has_gp_reloc = ret;
6654
6655 /* Functions that don't use the TOC can belong in any TOC group.
6656 Use the last TOC base. This happens to make _init and _fini
6657 pasting work. */
6658 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6659 return TRUE;
6660 }
6661
6662 /* See whether we can group stub sections together. Grouping stub
6663 sections may result in fewer stubs. More importantly, we need to
6664 put all .init* and .fini* stubs at the beginning of the .init or
6665 .fini output sections respectively, because glibc splits the
6666 _init and _fini functions into multiple parts. Putting a stub in
6667 the middle of a function is not a good idea. */
6668
6669 static void
6670 group_sections (struct ppc_link_hash_table *htab,
6671 bfd_size_type stub_group_size,
6672 bfd_boolean stubs_always_before_branch)
6673 {
6674 asection **list = htab->input_list + htab->top_index;
6675 do
6676 {
6677 asection *tail = *list;
6678 while (tail != NULL)
6679 {
6680 asection *curr;
6681 asection *prev;
6682 bfd_size_type total;
6683 bfd_boolean big_sec;
6684 bfd_vma curr_toc;
6685
6686 curr = tail;
6687 if (tail->_cooked_size)
6688 total = tail->_cooked_size;
6689 else
6690 total = tail->_raw_size;
6691 big_sec = total >= stub_group_size;
6692 curr_toc = htab->stub_group[tail->id].toc_off;
6693
6694 while ((prev = PREV_SEC (curr)) != NULL
6695 && ((total += curr->output_offset - prev->output_offset)
6696 < stub_group_size)
6697 && htab->stub_group[prev->id].toc_off == curr_toc)
6698 curr = prev;
6699
6700 /* OK, the size from the start of CURR to the end is less
6701 than stub_group_size and thus can be handled by one stub
6702 section. (or the tail section is itself larger than
6703 stub_group_size, in which case we may be toast.) We
6704 should really be keeping track of the total size of stubs
6705 added here, as stubs contribute to the final output
6706 section size. That's a little tricky, and this way will
6707 only break if stubs added make the total size more than
6708 2^25, ie. for the default stub_group_size, if stubs total
6709 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6710 do
6711 {
6712 prev = PREV_SEC (tail);
6713 /* Set up this stub group. */
6714 htab->stub_group[tail->id].link_sec = curr;
6715 }
6716 while (tail != curr && (tail = prev) != NULL);
6717
6718 /* But wait, there's more! Input sections up to stub_group_size
6719 bytes before the stub section can be handled by it too.
6720 Don't do this if we have a really large section after the
6721 stubs, as adding more stubs increases the chance that
6722 branches may not reach into the stub section. */
6723 if (!stubs_always_before_branch && !big_sec)
6724 {
6725 total = 0;
6726 while (prev != NULL
6727 && ((total += tail->output_offset - prev->output_offset)
6728 < stub_group_size)
6729 && htab->stub_group[prev->id].toc_off == curr_toc)
6730 {
6731 tail = prev;
6732 prev = PREV_SEC (tail);
6733 htab->stub_group[tail->id].link_sec = curr;
6734 }
6735 }
6736 tail = prev;
6737 }
6738 }
6739 while (list-- != htab->input_list);
6740 free (htab->input_list);
6741 #undef PREV_SEC
6742 }
6743
6744 /* Determine and set the size of the stub section for a final link.
6745
6746 The basic idea here is to examine all the relocations looking for
6747 PC-relative calls to a target that is unreachable with a "bl"
6748 instruction. */
6749
6750 bfd_boolean
6751 ppc64_elf_size_stubs (bfd *output_bfd,
6752 struct bfd_link_info *info,
6753 bfd_signed_vma group_size,
6754 asection *(*add_stub_section) (const char *, asection *),
6755 void (*layout_sections_again) (void))
6756 {
6757 bfd_size_type stub_group_size;
6758 bfd_boolean stubs_always_before_branch;
6759 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6760
6761 /* Stash our params away. */
6762 htab->add_stub_section = add_stub_section;
6763 htab->layout_sections_again = layout_sections_again;
6764 stubs_always_before_branch = group_size < 0;
6765 if (group_size < 0)
6766 stub_group_size = -group_size;
6767 else
6768 stub_group_size = group_size;
6769 if (stub_group_size == 1)
6770 {
6771 /* Default values. */
6772 if (stubs_always_before_branch)
6773 {
6774 stub_group_size = 0x1e00000;
6775 if (htab->has_14bit_branch)
6776 stub_group_size = 0x7800;
6777 }
6778 else
6779 {
6780 stub_group_size = 0x1c00000;
6781 if (htab->has_14bit_branch)
6782 stub_group_size = 0x7000;
6783 }
6784 }
6785
6786 group_sections (htab, stub_group_size, stubs_always_before_branch);
6787
6788 while (1)
6789 {
6790 bfd *input_bfd;
6791 unsigned int bfd_indx;
6792 asection *stub_sec;
6793 bfd_boolean stub_changed;
6794
6795 htab->stub_iteration += 1;
6796 stub_changed = FALSE;
6797
6798 for (input_bfd = info->input_bfds, bfd_indx = 0;
6799 input_bfd != NULL;
6800 input_bfd = input_bfd->link_next, bfd_indx++)
6801 {
6802 Elf_Internal_Shdr *symtab_hdr;
6803 asection *section;
6804 Elf_Internal_Sym *local_syms = NULL;
6805
6806 /* We'll need the symbol table in a second. */
6807 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6808 if (symtab_hdr->sh_info == 0)
6809 continue;
6810
6811 /* Walk over each section attached to the input bfd. */
6812 for (section = input_bfd->sections;
6813 section != NULL;
6814 section = section->next)
6815 {
6816 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6817
6818 /* If there aren't any relocs, then there's nothing more
6819 to do. */
6820 if ((section->flags & SEC_RELOC) == 0
6821 || section->reloc_count == 0)
6822 continue;
6823
6824 /* If this section is a link-once section that will be
6825 discarded, then don't create any stubs. */
6826 if (section->output_section == NULL
6827 || section->output_section->owner != output_bfd)
6828 continue;
6829
6830 /* Get the relocs. */
6831 internal_relocs
6832 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6833 info->keep_memory);
6834 if (internal_relocs == NULL)
6835 goto error_ret_free_local;
6836
6837 /* Now examine each relocation. */
6838 irela = internal_relocs;
6839 irelaend = irela + section->reloc_count;
6840 for (; irela < irelaend; irela++)
6841 {
6842 enum elf_ppc64_reloc_type r_type;
6843 unsigned int r_indx;
6844 enum ppc_stub_type stub_type;
6845 struct ppc_stub_hash_entry *stub_entry;
6846 asection *sym_sec;
6847 bfd_vma sym_value;
6848 bfd_vma destination;
6849 struct ppc_link_hash_entry *hash;
6850 struct elf_link_hash_entry *h;
6851 Elf_Internal_Sym *sym;
6852 char *stub_name;
6853 const asection *id_sec;
6854
6855 r_type = ELF64_R_TYPE (irela->r_info);
6856 r_indx = ELF64_R_SYM (irela->r_info);
6857
6858 if (r_type >= R_PPC64_max)
6859 {
6860 bfd_set_error (bfd_error_bad_value);
6861 goto error_ret_free_internal;
6862 }
6863
6864 /* Only look for stubs on branch instructions. */
6865 if (r_type != R_PPC64_REL24
6866 && r_type != R_PPC64_REL14
6867 && r_type != R_PPC64_REL14_BRTAKEN
6868 && r_type != R_PPC64_REL14_BRNTAKEN)
6869 continue;
6870
6871 /* Now determine the call target, its name, value,
6872 section. */
6873 destination = 0;
6874 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6875 r_indx, input_bfd))
6876 goto error_ret_free_internal;
6877 hash = (struct ppc_link_hash_entry *) h;
6878
6879 if (hash == NULL)
6880 {
6881 /* It's a local symbol. */
6882 sym_value = sym->st_value;
6883 destination = (sym_value + irela->r_addend
6884 + sym_sec->output_offset
6885 + sym_sec->output_section->vma);
6886 }
6887 else
6888 {
6889 /* It's an external symbol. */
6890 sym_value = 0;
6891 if (hash->elf.root.type == bfd_link_hash_defined
6892 || hash->elf.root.type == bfd_link_hash_defweak)
6893 {
6894 sym_value = hash->elf.root.u.def.value;
6895 if (sym_sec->output_section != NULL)
6896 destination = (sym_value + irela->r_addend
6897 + sym_sec->output_offset
6898 + sym_sec->output_section->vma);
6899 }
6900 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6901 ;
6902 else if (hash->elf.root.type == bfd_link_hash_undefined)
6903 ;
6904 else
6905 {
6906 bfd_set_error (bfd_error_bad_value);
6907 goto error_ret_free_internal;
6908 }
6909 }
6910
6911 /* Determine what (if any) linker stub is needed. */
6912 stub_type = ppc_type_of_stub (section, irela, &hash,
6913 destination);
6914
6915 if (stub_type != ppc_stub_plt_call)
6916 {
6917 /* Check whether we need a TOC adjusting stub.
6918 Since the linker pastes together pieces from
6919 different object files when creating the
6920 _init and _fini functions, it may be that a
6921 call to what looks like a local sym is in
6922 fact a call needing a TOC adjustment. */
6923 if (sym_sec != NULL
6924 && sym_sec->output_section != NULL
6925 && (htab->stub_group[sym_sec->id].toc_off
6926 != htab->stub_group[section->id].toc_off)
6927 && sym_sec->has_gp_reloc
6928 && section->has_gp_reloc)
6929 stub_type = ppc_stub_long_branch_r2off;
6930 }
6931
6932 if (stub_type == ppc_stub_none)
6933 continue;
6934
6935 /* __tls_get_addr calls might be eliminated. */
6936 if (stub_type != ppc_stub_plt_call
6937 && hash != NULL
6938 && &hash->elf == htab->tls_get_addr
6939 && section->has_tls_reloc
6940 && irela != internal_relocs)
6941 {
6942 /* Get tls info. */
6943 char *tls_mask;
6944
6945 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
6946 irela - 1, input_bfd))
6947 goto error_ret_free_internal;
6948 if (*tls_mask != 0)
6949 continue;
6950 }
6951
6952 /* Support for grouping stub sections. */
6953 id_sec = htab->stub_group[section->id].link_sec;
6954
6955 /* Get the name of this stub. */
6956 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6957 if (!stub_name)
6958 goto error_ret_free_internal;
6959
6960 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6961 stub_name, FALSE, FALSE);
6962 if (stub_entry != NULL)
6963 {
6964 /* The proper stub has already been created. */
6965 free (stub_name);
6966 continue;
6967 }
6968
6969 stub_entry = ppc_add_stub (stub_name, section, htab);
6970 if (stub_entry == NULL)
6971 {
6972 free (stub_name);
6973 error_ret_free_internal:
6974 if (elf_section_data (section)->relocs == NULL)
6975 free (internal_relocs);
6976 error_ret_free_local:
6977 if (local_syms != NULL
6978 && (symtab_hdr->contents
6979 != (unsigned char *) local_syms))
6980 free (local_syms);
6981 return FALSE;
6982 }
6983
6984 stub_entry->stub_type = stub_type;
6985 stub_entry->target_value = sym_value;
6986 stub_entry->target_section = sym_sec;
6987 stub_entry->h = hash;
6988 stub_entry->addend = irela->r_addend;
6989 stub_changed = TRUE;
6990 }
6991
6992 /* We're done with the internal relocs, free them. */
6993 if (elf_section_data (section)->relocs != internal_relocs)
6994 free (internal_relocs);
6995 }
6996
6997 if (local_syms != NULL
6998 && symtab_hdr->contents != (unsigned char *) local_syms)
6999 {
7000 if (!info->keep_memory)
7001 free (local_syms);
7002 else
7003 symtab_hdr->contents = (unsigned char *) local_syms;
7004 }
7005 }
7006
7007 if (!stub_changed)
7008 break;
7009
7010 /* OK, we've added some stubs. Find out the new size of the
7011 stub sections. */
7012 for (stub_sec = htab->stub_bfd->sections;
7013 stub_sec != NULL;
7014 stub_sec = stub_sec->next)
7015 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7016 {
7017 stub_sec->_raw_size = 0;
7018 stub_sec->_cooked_size = 0;
7019 }
7020 htab->brlt->_raw_size = 0;
7021 htab->brlt->_cooked_size = 0;
7022
7023 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
7024
7025 /* Ask the linker to do its stuff. */
7026 (*htab->layout_sections_again) ();
7027 }
7028
7029 /* It would be nice to strip .branch_lt from the output if the
7030 section is empty, but it's too late. If we strip sections here,
7031 the dynamic symbol table is corrupted since the section symbol
7032 for the stripped section isn't written. */
7033
7034 return TRUE;
7035 }
7036
7037 /* Called after we have determined section placement. If sections
7038 move, we'll be called again. Provide a value for TOCstart. */
7039
7040 bfd_vma
7041 ppc64_elf_toc (bfd *obfd)
7042 {
7043 asection *s;
7044 bfd_vma TOCstart;
7045
7046 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7047 order. The TOC starts where the first of these sections starts. */
7048 s = bfd_get_section_by_name (obfd, ".got");
7049 if (s == NULL)
7050 s = bfd_get_section_by_name (obfd, ".toc");
7051 if (s == NULL)
7052 s = bfd_get_section_by_name (obfd, ".tocbss");
7053 if (s == NULL)
7054 s = bfd_get_section_by_name (obfd, ".plt");
7055 if (s == NULL)
7056 {
7057 /* This may happen for
7058 o references to TOC base (SYM@toc / TOC[tc0]) without a
7059 .toc directive
7060 o bad linker script
7061 o --gc-sections and empty TOC sections
7062
7063 FIXME: Warn user? */
7064
7065 /* Look for a likely section. We probably won't even be
7066 using TOCstart. */
7067 for (s = obfd->sections; s != NULL; s = s->next)
7068 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7069 == (SEC_ALLOC | SEC_SMALL_DATA))
7070 break;
7071 if (s == NULL)
7072 for (s = obfd->sections; s != NULL; s = s->next)
7073 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7074 == (SEC_ALLOC | SEC_SMALL_DATA))
7075 break;
7076 if (s == NULL)
7077 for (s = obfd->sections; s != NULL; s = s->next)
7078 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7079 break;
7080 if (s == NULL)
7081 for (s = obfd->sections; s != NULL; s = s->next)
7082 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7083 break;
7084 }
7085
7086 TOCstart = 0;
7087 if (s != NULL)
7088 TOCstart = s->output_section->vma + s->output_offset;
7089
7090 return TOCstart;
7091 }
7092
7093 /* Build all the stubs associated with the current output file.
7094 The stubs are kept in a hash table attached to the main linker
7095 hash table. This function is called via gldelf64ppc_finish. */
7096
7097 bfd_boolean
7098 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7099 struct bfd_link_info *info,
7100 char **stats)
7101 {
7102 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7103 asection *stub_sec;
7104 bfd_byte *p;
7105 int stub_sec_count = 0;
7106
7107 htab->emit_stub_syms = emit_stub_syms;
7108 for (stub_sec = htab->stub_bfd->sections;
7109 stub_sec != NULL;
7110 stub_sec = stub_sec->next)
7111 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7112 {
7113 bfd_size_type size;
7114
7115 /* Allocate memory to hold the linker stubs. */
7116 size = stub_sec->_raw_size;
7117 if (size != 0)
7118 {
7119 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7120 if (stub_sec->contents == NULL)
7121 return FALSE;
7122 }
7123 stub_sec->_cooked_size = 0;
7124 }
7125
7126 if (htab->plt != NULL)
7127 {
7128 unsigned int indx;
7129 bfd_vma plt0;
7130
7131 /* Build the .glink plt call stub. */
7132 plt0 = (htab->plt->output_section->vma
7133 + htab->plt->output_offset
7134 - (htab->glink->output_section->vma
7135 + htab->glink->output_offset
7136 + GLINK_CALL_STUB_SIZE));
7137 if (plt0 + 0x80008000 > 0xffffffff)
7138 {
7139 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7140 bfd_set_error (bfd_error_bad_value);
7141 return FALSE;
7142 }
7143
7144 if (htab->emit_stub_syms)
7145 {
7146 struct elf_link_hash_entry *h;
7147 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7148 if (h == NULL)
7149 return FALSE;
7150 if (h->root.type == bfd_link_hash_new)
7151 {
7152 h->root.type = bfd_link_hash_defined;
7153 h->root.u.def.section = htab->glink;
7154 h->root.u.def.value = 0;
7155 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7156 | ELF_LINK_HASH_DEF_REGULAR
7157 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7158 | ELF_LINK_FORCED_LOCAL);
7159 }
7160 }
7161 p = htab->glink->contents;
7162 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7163 p += 4;
7164 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7165 p += 4;
7166 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7167 p += 4;
7168 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7169 p += 4;
7170 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7171 p += 4;
7172 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7173 p += 4;
7174 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7175 p += 4;
7176 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7177 p += 4;
7178 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7179 p += 4;
7180 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7181 p += 4;
7182 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7183 p += 4;
7184 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7185 p += 4;
7186 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7187 p += 4;
7188 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7189 p += 4;
7190 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7191 p += 4;
7192 bfd_put_32 (htab->glink->owner, BCTR, p);
7193 p += 4;
7194
7195 /* Build the .glink lazy link call stubs. */
7196 indx = 0;
7197 while (p < htab->glink->contents + htab->glink->_raw_size)
7198 {
7199 if (indx < 0x8000)
7200 {
7201 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7202 p += 4;
7203 }
7204 else
7205 {
7206 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7207 p += 4;
7208 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7209 p += 4;
7210 }
7211 bfd_put_32 (htab->glink->owner,
7212 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7213 indx++;
7214 p += 4;
7215 }
7216 htab->glink->_cooked_size = p - htab->glink->contents;
7217 }
7218
7219 if (htab->brlt->_raw_size != 0)
7220 {
7221 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7222 htab->brlt->_raw_size);
7223 if (htab->brlt->contents == NULL)
7224 return FALSE;
7225 }
7226
7227 /* Build the stubs as directed by the stub hash table. */
7228 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7229
7230 for (stub_sec = htab->stub_bfd->sections;
7231 stub_sec != NULL;
7232 stub_sec = stub_sec->next)
7233 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7234 {
7235 stub_sec_count += 1;
7236 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7237 break;
7238 }
7239
7240 if (stub_sec != NULL
7241 || htab->glink->_raw_size != htab->glink->_cooked_size)
7242 {
7243 htab->stub_error = TRUE;
7244 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7245 }
7246
7247 if (htab->stub_error)
7248 return FALSE;
7249
7250 if (stats != NULL)
7251 {
7252 *stats = bfd_malloc (500);
7253 if (*stats == NULL)
7254 return FALSE;
7255
7256 sprintf (*stats, _("linker stubs in %u groups\n"
7257 " branch %lu\n"
7258 " toc adjust %lu\n"
7259 " long branch %lu\n"
7260 " long toc adj %lu\n"
7261 " plt call %lu"),
7262 stub_sec_count,
7263 htab->stub_count[ppc_stub_long_branch - 1],
7264 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7265 htab->stub_count[ppc_stub_plt_branch - 1],
7266 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7267 htab->stub_count[ppc_stub_plt_call - 1]);
7268 }
7269 return TRUE;
7270 }
7271
7272 /* The RELOCATE_SECTION function is called by the ELF backend linker
7273 to handle the relocations for a section.
7274
7275 The relocs are always passed as Rela structures; if the section
7276 actually uses Rel structures, the r_addend field will always be
7277 zero.
7278
7279 This function is responsible for adjust the section contents as
7280 necessary, and (if using Rela relocs and generating a
7281 relocatable output file) adjusting the reloc addend as
7282 necessary.
7283
7284 This function does not have to worry about setting the reloc
7285 address or the reloc symbol index.
7286
7287 LOCAL_SYMS is a pointer to the swapped in local symbols.
7288
7289 LOCAL_SECTIONS is an array giving the section in the input file
7290 corresponding to the st_shndx field of each local symbol.
7291
7292 The global hash table entry for the global symbols can be found
7293 via elf_sym_hashes (input_bfd).
7294
7295 When generating relocatable output, this function must handle
7296 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7297 going to be the section symbol corresponding to the output
7298 section, which means that the addend must be adjusted
7299 accordingly. */
7300
7301 static bfd_boolean
7302 ppc64_elf_relocate_section (bfd *output_bfd,
7303 struct bfd_link_info *info,
7304 bfd *input_bfd,
7305 asection *input_section,
7306 bfd_byte *contents,
7307 Elf_Internal_Rela *relocs,
7308 Elf_Internal_Sym *local_syms,
7309 asection **local_sections)
7310 {
7311 struct ppc_link_hash_table *htab;
7312 Elf_Internal_Shdr *symtab_hdr;
7313 struct elf_link_hash_entry **sym_hashes;
7314 Elf_Internal_Rela *rel;
7315 Elf_Internal_Rela *relend;
7316 Elf_Internal_Rela outrel;
7317 bfd_byte *loc;
7318 struct got_entry **local_got_ents;
7319 bfd_vma TOCstart;
7320 bfd_boolean ret = TRUE;
7321 bfd_boolean is_opd;
7322 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7323 bfd_boolean is_power4 = FALSE;
7324
7325 if (info->relocatable)
7326 return TRUE;
7327
7328 /* Initialize howto table if needed. */
7329 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7330 ppc_howto_init ();
7331
7332 htab = ppc_hash_table (info);
7333 local_got_ents = elf_local_got_ents (input_bfd);
7334 TOCstart = elf_gp (output_bfd);
7335 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7336 sym_hashes = elf_sym_hashes (input_bfd);
7337 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7338
7339 rel = relocs;
7340 relend = relocs + input_section->reloc_count;
7341 for (; rel < relend; rel++)
7342 {
7343 enum elf_ppc64_reloc_type r_type;
7344 bfd_vma addend;
7345 bfd_reloc_status_type r;
7346 Elf_Internal_Sym *sym;
7347 asection *sec;
7348 struct elf_link_hash_entry *h;
7349 struct elf_link_hash_entry *fdh;
7350 const char *sym_name;
7351 unsigned long r_symndx, toc_symndx;
7352 char tls_mask, tls_gd, tls_type;
7353 char sym_type;
7354 bfd_vma relocation;
7355 bfd_boolean unresolved_reloc;
7356 bfd_boolean warned;
7357 unsigned long insn, mask;
7358 struct ppc_stub_hash_entry *stub_entry;
7359 bfd_vma max_br_offset;
7360 bfd_vma from;
7361
7362 r_type = ELF64_R_TYPE (rel->r_info);
7363 r_symndx = ELF64_R_SYM (rel->r_info);
7364
7365 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7366 symbol of the previous ADDR64 reloc. The symbol gives us the
7367 proper TOC base to use. */
7368 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7369 && rel != relocs
7370 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7371 && is_opd)
7372 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7373
7374 sym = NULL;
7375 sec = NULL;
7376 h = NULL;
7377 sym_name = NULL;
7378 unresolved_reloc = FALSE;
7379 warned = FALSE;
7380
7381 if (r_symndx < symtab_hdr->sh_info)
7382 {
7383 /* It's a local symbol. */
7384 sym = local_syms + r_symndx;
7385 sec = local_sections[r_symndx];
7386 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7387 sym_type = ELF64_ST_TYPE (sym->st_info);
7388 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7389 if (elf_section_data (sec) != NULL)
7390 {
7391 long *opd_sym_adjust;
7392
7393 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7394 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7395 relocation += opd_sym_adjust[sym->st_value / 24];
7396 }
7397 }
7398 else
7399 {
7400 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
7401 symtab_hdr, relocation, sec,
7402 unresolved_reloc, info,
7403 warned);
7404 sym_name = h->root.root.string;
7405 sym_type = h->type;
7406 }
7407
7408 /* TLS optimizations. Replace instruction sequences and relocs
7409 based on information we collected in tls_optimize. We edit
7410 RELOCS so that --emit-relocs will output something sensible
7411 for the final instruction stream. */
7412 tls_mask = 0;
7413 tls_gd = 0;
7414 toc_symndx = 0;
7415 if (IS_PPC64_TLS_RELOC (r_type))
7416 {
7417 if (h != NULL)
7418 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7419 else if (local_got_ents != NULL)
7420 {
7421 char *lgot_masks;
7422 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7423 tls_mask = lgot_masks[r_symndx];
7424 }
7425 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7426 {
7427 /* Check for toc tls entries. */
7428 char *toc_tls;
7429
7430 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7431 rel, input_bfd))
7432 return FALSE;
7433
7434 if (toc_tls)
7435 tls_mask = *toc_tls;
7436 }
7437 }
7438
7439 /* Check that tls relocs are used with tls syms, and non-tls
7440 relocs are used with non-tls syms. */
7441 if (r_symndx != 0
7442 && r_type != R_PPC64_NONE
7443 && (h == NULL
7444 || h->root.type == bfd_link_hash_defined
7445 || h->root.type == bfd_link_hash_defweak)
7446 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7447 {
7448 if (r_type == R_PPC64_TLS && tls_mask != 0)
7449 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7450 ;
7451 else
7452 (*_bfd_error_handler)
7453 (sym_type == STT_TLS
7454 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7455 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7456 bfd_archive_filename (input_bfd),
7457 input_section->name,
7458 (long) rel->r_offset,
7459 ppc64_elf_howto_table[r_type]->name,
7460 sym_name);
7461 }
7462
7463 /* Ensure reloc mapping code below stays sane. */
7464 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7465 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7466 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7467 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7468 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7469 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7470 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7471 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7472 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7473 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7474 abort ();
7475
7476 switch (r_type)
7477 {
7478 default:
7479 break;
7480
7481 case R_PPC64_TOC16:
7482 case R_PPC64_TOC16_LO:
7483 case R_PPC64_TOC16_DS:
7484 case R_PPC64_TOC16_LO_DS:
7485 {
7486 /* Check for toc tls entries. */
7487 char *toc_tls;
7488 int retval;
7489
7490 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7491 rel, input_bfd);
7492 if (retval == 0)
7493 return FALSE;
7494
7495 if (toc_tls)
7496 {
7497 tls_mask = *toc_tls;
7498 if (r_type == R_PPC64_TOC16_DS
7499 || r_type == R_PPC64_TOC16_LO_DS)
7500 {
7501 if (tls_mask != 0
7502 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7503 goto toctprel;
7504 }
7505 else
7506 {
7507 /* If we found a GD reloc pair, then we might be
7508 doing a GD->IE transition. */
7509 if (retval == 2)
7510 {
7511 tls_gd = TLS_TPRELGD;
7512 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7513 goto tls_get_addr_check;
7514 }
7515 else if (retval == 3)
7516 {
7517 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7518 goto tls_get_addr_check;
7519 }
7520 }
7521 }
7522 }
7523 break;
7524
7525 case R_PPC64_GOT_TPREL16_DS:
7526 case R_PPC64_GOT_TPREL16_LO_DS:
7527 if (tls_mask != 0
7528 && (tls_mask & TLS_TPREL) == 0)
7529 {
7530 toctprel:
7531 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7532 insn &= 31 << 21;
7533 insn |= 0x3c0d0000; /* addis 0,13,0 */
7534 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7535 r_type = R_PPC64_TPREL16_HA;
7536 if (toc_symndx != 0)
7537 {
7538 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7539 /* We changed the symbol. Start over in order to
7540 get h, sym, sec etc. right. */
7541 rel--;
7542 continue;
7543 }
7544 else
7545 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7546 }
7547 break;
7548
7549 case R_PPC64_TLS:
7550 if (tls_mask != 0
7551 && (tls_mask & TLS_TPREL) == 0)
7552 {
7553 bfd_vma rtra;
7554 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7555 if ((insn & ((0x3f << 26) | (31 << 11)))
7556 == ((31 << 26) | (13 << 11)))
7557 rtra = insn & ((1 << 26) - (1 << 16));
7558 else if ((insn & ((0x3f << 26) | (31 << 16)))
7559 == ((31 << 26) | (13 << 16)))
7560 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7561 else
7562 abort ();
7563 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7564 /* add -> addi. */
7565 insn = 14 << 26;
7566 else if ((insn & (31 << 1)) == 23 << 1
7567 && ((insn & (31 << 6)) < 14 << 6
7568 || ((insn & (31 << 6)) >= 16 << 6
7569 && (insn & (31 << 6)) < 24 << 6)))
7570 /* load and store indexed -> dform. */
7571 insn = (32 | ((insn >> 6) & 31)) << 26;
7572 else if ((insn & (31 << 1)) == 21 << 1
7573 && (insn & (0x1a << 6)) == 0)
7574 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7575 insn = (((58 | ((insn >> 6) & 4)) << 26)
7576 | ((insn >> 6) & 1));
7577 else if ((insn & (31 << 1)) == 21 << 1
7578 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7579 /* lwax -> lwa. */
7580 insn = (58 << 26) | 2;
7581 else
7582 abort ();
7583 insn |= rtra;
7584 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7585 /* Was PPC64_TLS which sits on insn boundary, now
7586 PPC64_TPREL16_LO which is at insn+2. */
7587 rel->r_offset += 2;
7588 r_type = R_PPC64_TPREL16_LO;
7589 if (toc_symndx != 0)
7590 {
7591 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7592 /* We changed the symbol. Start over in order to
7593 get h, sym, sec etc. right. */
7594 rel--;
7595 continue;
7596 }
7597 else
7598 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7599 }
7600 break;
7601
7602 case R_PPC64_GOT_TLSGD16_HI:
7603 case R_PPC64_GOT_TLSGD16_HA:
7604 tls_gd = TLS_TPRELGD;
7605 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7606 goto tls_gdld_hi;
7607 break;
7608
7609 case R_PPC64_GOT_TLSLD16_HI:
7610 case R_PPC64_GOT_TLSLD16_HA:
7611 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7612 {
7613 tls_gdld_hi:
7614 if ((tls_mask & tls_gd) != 0)
7615 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7616 + R_PPC64_GOT_TPREL16_DS);
7617 else
7618 {
7619 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7620 rel->r_offset -= 2;
7621 r_type = R_PPC64_NONE;
7622 }
7623 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7624 }
7625 break;
7626
7627 case R_PPC64_GOT_TLSGD16:
7628 case R_PPC64_GOT_TLSGD16_LO:
7629 tls_gd = TLS_TPRELGD;
7630 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7631 goto tls_get_addr_check;
7632 break;
7633
7634 case R_PPC64_GOT_TLSLD16:
7635 case R_PPC64_GOT_TLSLD16_LO:
7636 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7637 {
7638 tls_get_addr_check:
7639 if (rel + 1 < relend)
7640 {
7641 enum elf_ppc64_reloc_type r_type2;
7642 unsigned long r_symndx2;
7643 struct elf_link_hash_entry *h2;
7644 bfd_vma insn1, insn2, insn3;
7645 bfd_vma offset;
7646
7647 /* The next instruction should be a call to
7648 __tls_get_addr. Peek at the reloc to be sure. */
7649 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7650 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7651 if (r_symndx2 < symtab_hdr->sh_info
7652 || (r_type2 != R_PPC64_REL14
7653 && r_type2 != R_PPC64_REL14_BRTAKEN
7654 && r_type2 != R_PPC64_REL14_BRNTAKEN
7655 && r_type2 != R_PPC64_REL24))
7656 break;
7657
7658 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7659 while (h2->root.type == bfd_link_hash_indirect
7660 || h2->root.type == bfd_link_hash_warning)
7661 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7662 if (h2 == NULL || h2 != htab->tls_get_addr)
7663 break;
7664
7665 /* OK, it checks out. Replace the call. */
7666 offset = rel[1].r_offset;
7667 insn1 = bfd_get_32 (output_bfd,
7668 contents + rel->r_offset - 2);
7669 insn3 = bfd_get_32 (output_bfd,
7670 contents + offset + 4);
7671 if ((tls_mask & tls_gd) != 0)
7672 {
7673 /* IE */
7674 insn1 &= (1 << 26) - (1 << 2);
7675 insn1 |= 58 << 26; /* ld */
7676 insn2 = 0x7c636a14; /* add 3,3,13 */
7677 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7678 if ((tls_mask & TLS_EXPLICIT) == 0)
7679 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7680 + R_PPC64_GOT_TPREL16_DS);
7681 else
7682 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7683 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7684 }
7685 else
7686 {
7687 /* LE */
7688 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7689 insn2 = 0x38630000; /* addi 3,3,0 */
7690 if (tls_gd == 0)
7691 {
7692 /* Was an LD reloc. */
7693 r_symndx = 0;
7694 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7695 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7696 }
7697 else if (toc_symndx != 0)
7698 r_symndx = toc_symndx;
7699 r_type = R_PPC64_TPREL16_HA;
7700 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7701 rel[1].r_info = ELF64_R_INFO (r_symndx,
7702 R_PPC64_TPREL16_LO);
7703 rel[1].r_offset += 2;
7704 }
7705 if (insn3 == NOP
7706 || insn3 == CROR_151515 || insn3 == CROR_313131)
7707 {
7708 insn3 = insn2;
7709 insn2 = NOP;
7710 rel[1].r_offset += 4;
7711 }
7712 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7713 bfd_put_32 (output_bfd, insn2, contents + offset);
7714 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7715 if (tls_gd == 0 || toc_symndx != 0)
7716 {
7717 /* We changed the symbol. Start over in order
7718 to get h, sym, sec etc. right. */
7719 rel--;
7720 continue;
7721 }
7722 }
7723 }
7724 break;
7725
7726 case R_PPC64_DTPMOD64:
7727 if (rel + 1 < relend
7728 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7729 && rel[1].r_offset == rel->r_offset + 8)
7730 {
7731 if ((tls_mask & TLS_GD) == 0)
7732 {
7733 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7734 if ((tls_mask & TLS_TPRELGD) != 0)
7735 r_type = R_PPC64_TPREL64;
7736 else
7737 {
7738 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7739 r_type = R_PPC64_NONE;
7740 }
7741 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7742 }
7743 }
7744 else
7745 {
7746 if ((tls_mask & TLS_LD) == 0)
7747 {
7748 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7749 r_type = R_PPC64_NONE;
7750 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7751 }
7752 }
7753 break;
7754
7755 case R_PPC64_TPREL64:
7756 if ((tls_mask & TLS_TPREL) == 0)
7757 {
7758 r_type = R_PPC64_NONE;
7759 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7760 }
7761 break;
7762 }
7763
7764 /* Handle other relocations that tweak non-addend part of insn. */
7765 insn = 0;
7766 switch (r_type)
7767 {
7768 default:
7769 break;
7770
7771 /* Branch taken prediction relocations. */
7772 case R_PPC64_ADDR14_BRTAKEN:
7773 case R_PPC64_REL14_BRTAKEN:
7774 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7775 /* Fall thru. */
7776
7777 /* Branch not taken prediction relocations. */
7778 case R_PPC64_ADDR14_BRNTAKEN:
7779 case R_PPC64_REL14_BRNTAKEN:
7780 insn |= bfd_get_32 (output_bfd,
7781 contents + rel->r_offset) & ~(0x01 << 21);
7782 if (is_power4)
7783 {
7784 /* Set 'a' bit. This is 0b00010 in BO field for branch
7785 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7786 for branch on CTR insns (BO == 1a00t or 1a01t). */
7787 if ((insn & (0x14 << 21)) == (0x04 << 21))
7788 insn |= 0x02 << 21;
7789 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7790 insn |= 0x08 << 21;
7791 else
7792 break;
7793 }
7794 else
7795 {
7796 from = (rel->r_offset
7797 + input_section->output_offset
7798 + input_section->output_section->vma);
7799
7800 /* Invert 'y' bit if not the default. */
7801 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7802 insn ^= 0x01 << 21;
7803 }
7804
7805 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7806 break;
7807
7808 case R_PPC64_REL24:
7809 /* Calls to functions with a different TOC, such as calls to
7810 shared objects, need to alter the TOC pointer. This is
7811 done using a linkage stub. A REL24 branching to these
7812 linkage stubs needs to be followed by a nop, as the nop
7813 will be replaced with an instruction to restore the TOC
7814 base pointer. */
7815 if (((h != NULL
7816 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7817 && fdh->plt.plist != NULL)
7818 || ((fdh = h, sec) != NULL
7819 && sec->output_section != NULL
7820 && (htab->stub_group[sec->id].toc_off
7821 != htab->stub_group[input_section->id].toc_off)))
7822 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7823 rel, htab)) != NULL
7824 && (stub_entry->stub_type == ppc_stub_plt_call
7825 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7826 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7827 {
7828 bfd_boolean can_plt_call = 0;
7829
7830 if (rel->r_offset + 8 <= input_section->_cooked_size)
7831 {
7832 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7833 if (insn == NOP
7834 || insn == CROR_151515 || insn == CROR_313131)
7835 {
7836 bfd_put_32 (input_bfd, LD_R2_40R1,
7837 contents + rel->r_offset + 4);
7838 can_plt_call = 1;
7839 }
7840 }
7841
7842 if (!can_plt_call)
7843 {
7844 if (stub_entry->stub_type == ppc_stub_plt_call)
7845 {
7846 /* If this is a plain branch rather than a branch
7847 and link, don't require a nop. */
7848 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7849 if ((insn & 1) == 0)
7850 can_plt_call = 1;
7851 }
7852 else if (h != NULL
7853 && strcmp (h->root.root.string,
7854 ".__libc_start_main") == 0)
7855 {
7856 /* Allow crt1 branch to go via a toc adjusting stub. */
7857 can_plt_call = 1;
7858 }
7859 else
7860 {
7861 if (strcmp (input_section->output_section->name,
7862 ".init") == 0
7863 || strcmp (input_section->output_section->name,
7864 ".fini") == 0)
7865 (*_bfd_error_handler)
7866 (_("%s(%s+0x%lx): automatic multiple TOCs "
7867 "not supported using your crt files; "
7868 "recompile with -mminimal-toc or upgrade gcc"),
7869 bfd_archive_filename (input_bfd),
7870 input_section->name,
7871 (long) rel->r_offset);
7872 else
7873 (*_bfd_error_handler)
7874 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7875 "does not allow automatic multiple TOCs; "
7876 "recompile with -mminimal-toc or "
7877 "-fno-optimize-sibling-calls, "
7878 "or make `%s' extern"),
7879 bfd_archive_filename (input_bfd),
7880 input_section->name,
7881 (long) rel->r_offset,
7882 sym_name,
7883 sym_name);
7884 bfd_set_error (bfd_error_bad_value);
7885 ret = FALSE;
7886 }
7887 }
7888
7889 if (can_plt_call)
7890 {
7891 relocation = (stub_entry->stub_offset
7892 + stub_entry->stub_sec->output_offset
7893 + stub_entry->stub_sec->output_section->vma);
7894 if (stub_entry->stub_type == ppc_stub_plt_call)
7895 unresolved_reloc = FALSE;
7896 }
7897 }
7898
7899 if (h != NULL
7900 && h->root.type == bfd_link_hash_undefweak
7901 && relocation == 0
7902 && rel->r_addend == 0)
7903 {
7904 /* Tweak calls to undefined weak functions to point at a
7905 blr. We can thus call a weak function without first
7906 checking whether the function is defined. We have a
7907 blr at the end of .sfpr. */
7908 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7909 relocation = (htab->sfpr->_raw_size - 4
7910 + htab->sfpr->output_offset
7911 + htab->sfpr->output_section->vma);
7912 from = (rel->r_offset
7913 + input_section->output_offset
7914 + input_section->output_section->vma);
7915
7916 /* But let's not be silly about it. If the blr isn't in
7917 reach, just go to the next instruction. */
7918 if (relocation - from + (1 << 25) >= (1 << 26)
7919 || htab->sfpr->_raw_size == 0)
7920 relocation = from + 4;
7921 }
7922 break;
7923 }
7924
7925 /* Set `addend'. */
7926 tls_type = 0;
7927 addend = rel->r_addend;
7928 switch (r_type)
7929 {
7930 default:
7931 (*_bfd_error_handler)
7932 (_("%s: unknown relocation type %d for symbol %s"),
7933 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7934
7935 bfd_set_error (bfd_error_bad_value);
7936 ret = FALSE;
7937 continue;
7938
7939 case R_PPC64_NONE:
7940 case R_PPC64_TLS:
7941 case R_PPC64_GNU_VTINHERIT:
7942 case R_PPC64_GNU_VTENTRY:
7943 continue;
7944
7945 /* GOT16 relocations. Like an ADDR16 using the symbol's
7946 address in the GOT as relocation value instead of the
7947 symbol's value itself. Also, create a GOT entry for the
7948 symbol and put the symbol value there. */
7949 case R_PPC64_GOT_TLSGD16:
7950 case R_PPC64_GOT_TLSGD16_LO:
7951 case R_PPC64_GOT_TLSGD16_HI:
7952 case R_PPC64_GOT_TLSGD16_HA:
7953 tls_type = TLS_TLS | TLS_GD;
7954 goto dogot;
7955
7956 case R_PPC64_GOT_TLSLD16:
7957 case R_PPC64_GOT_TLSLD16_LO:
7958 case R_PPC64_GOT_TLSLD16_HI:
7959 case R_PPC64_GOT_TLSLD16_HA:
7960 tls_type = TLS_TLS | TLS_LD;
7961 goto dogot;
7962
7963 case R_PPC64_GOT_TPREL16_DS:
7964 case R_PPC64_GOT_TPREL16_LO_DS:
7965 case R_PPC64_GOT_TPREL16_HI:
7966 case R_PPC64_GOT_TPREL16_HA:
7967 tls_type = TLS_TLS | TLS_TPREL;
7968 goto dogot;
7969
7970 case R_PPC64_GOT_DTPREL16_DS:
7971 case R_PPC64_GOT_DTPREL16_LO_DS:
7972 case R_PPC64_GOT_DTPREL16_HI:
7973 case R_PPC64_GOT_DTPREL16_HA:
7974 tls_type = TLS_TLS | TLS_DTPREL;
7975 goto dogot;
7976
7977 case R_PPC64_GOT16:
7978 case R_PPC64_GOT16_LO:
7979 case R_PPC64_GOT16_HI:
7980 case R_PPC64_GOT16_HA:
7981 case R_PPC64_GOT16_DS:
7982 case R_PPC64_GOT16_LO_DS:
7983 dogot:
7984 {
7985 /* Relocation is to the entry for this symbol in the global
7986 offset table. */
7987 asection *got;
7988 bfd_vma *offp;
7989 bfd_vma off;
7990 unsigned long indx = 0;
7991
7992 if (tls_type == (TLS_TLS | TLS_LD)
7993 && (h == NULL
7994 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7995 offp = &ppc64_tlsld_got (input_bfd)->offset;
7996 else
7997 {
7998 struct got_entry *ent;
7999
8000 if (h != NULL)
8001 {
8002 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8003 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8004 || (info->shared
8005 && SYMBOL_REFERENCES_LOCAL (info, h)))
8006 /* This is actually a static link, or it is a
8007 -Bsymbolic link and the symbol is defined
8008 locally, or the symbol was forced to be local
8009 because of a version file. */
8010 ;
8011 else
8012 {
8013 indx = h->dynindx;
8014 unresolved_reloc = FALSE;
8015 }
8016 ent = h->got.glist;
8017 }
8018 else
8019 {
8020 if (local_got_ents == NULL)
8021 abort ();
8022 ent = local_got_ents[r_symndx];
8023 }
8024
8025 for (; ent != NULL; ent = ent->next)
8026 if (ent->addend == rel->r_addend
8027 && ent->owner == input_bfd
8028 && ent->tls_type == tls_type)
8029 break;
8030 if (ent == NULL)
8031 abort ();
8032 offp = &ent->got.offset;
8033 }
8034
8035 got = ppc64_elf_tdata (input_bfd)->got;
8036 if (got == NULL)
8037 abort ();
8038
8039 /* The offset must always be a multiple of 8. We use the
8040 least significant bit to record whether we have already
8041 processed this entry. */
8042 off = *offp;
8043 if ((off & 1) != 0)
8044 off &= ~1;
8045 else
8046 {
8047 /* Generate relocs for the dynamic linker, except in
8048 the case of TLSLD where we'll use one entry per
8049 module. */
8050 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8051
8052 *offp = off | 1;
8053 if ((info->shared || indx != 0)
8054 && (h == NULL
8055 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8056 || h->root.type != bfd_link_hash_undefweak))
8057 {
8058 outrel.r_offset = (got->output_section->vma
8059 + got->output_offset
8060 + off);
8061 outrel.r_addend = rel->r_addend;
8062 if (tls_type & (TLS_LD | TLS_GD))
8063 {
8064 outrel.r_addend = 0;
8065 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8066 if (tls_type == (TLS_TLS | TLS_GD))
8067 {
8068 loc = relgot->contents;
8069 loc += (relgot->reloc_count++
8070 * sizeof (Elf64_External_Rela));
8071 bfd_elf64_swap_reloca_out (output_bfd,
8072 &outrel, loc);
8073 outrel.r_offset += 8;
8074 outrel.r_addend = rel->r_addend;
8075 outrel.r_info
8076 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8077 }
8078 }
8079 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8080 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8081 else if (tls_type == (TLS_TLS | TLS_TPREL))
8082 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8083 else if (indx == 0)
8084 {
8085 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8086
8087 /* Write the .got section contents for the sake
8088 of prelink. */
8089 loc = got->contents + off;
8090 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8091 loc);
8092 }
8093 else
8094 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8095
8096 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8097 {
8098 outrel.r_addend += relocation;
8099 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8100 outrel.r_addend -= htab->tls_sec->vma;
8101 }
8102 loc = relgot->contents;
8103 loc += (relgot->reloc_count++
8104 * sizeof (Elf64_External_Rela));
8105 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8106 }
8107
8108 /* Init the .got section contents here if we're not
8109 emitting a reloc. */
8110 else
8111 {
8112 relocation += rel->r_addend;
8113 if (tls_type == (TLS_TLS | TLS_LD))
8114 relocation = 1;
8115 else if (tls_type != 0)
8116 {
8117 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8118 if (tls_type == (TLS_TLS | TLS_TPREL))
8119 relocation += DTP_OFFSET - TP_OFFSET;
8120
8121 if (tls_type == (TLS_TLS | TLS_GD))
8122 {
8123 bfd_put_64 (output_bfd, relocation,
8124 got->contents + off + 8);
8125 relocation = 1;
8126 }
8127 }
8128
8129 bfd_put_64 (output_bfd, relocation,
8130 got->contents + off);
8131 }
8132 }
8133
8134 if (off >= (bfd_vma) -2)
8135 abort ();
8136
8137 relocation = got->output_offset + off;
8138
8139 /* TOC base (r2) is TOC start plus 0x8000. */
8140 addend = -TOC_BASE_OFF;
8141 }
8142 break;
8143
8144 case R_PPC64_PLT16_HA:
8145 case R_PPC64_PLT16_HI:
8146 case R_PPC64_PLT16_LO:
8147 case R_PPC64_PLT32:
8148 case R_PPC64_PLT64:
8149 /* Relocation is to the entry for this symbol in the
8150 procedure linkage table. */
8151
8152 /* Resolve a PLT reloc against a local symbol directly,
8153 without using the procedure linkage table. */
8154 if (h == NULL)
8155 break;
8156
8157 /* It's possible that we didn't make a PLT entry for this
8158 symbol. This happens when statically linking PIC code,
8159 or when using -Bsymbolic. Go find a match if there is a
8160 PLT entry. */
8161 if (htab->plt != NULL)
8162 {
8163 struct plt_entry *ent;
8164 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8165 if (ent->addend == rel->r_addend
8166 && ent->plt.offset != (bfd_vma) -1)
8167 {
8168 relocation = (htab->plt->output_section->vma
8169 + htab->plt->output_offset
8170 + ent->plt.offset);
8171 unresolved_reloc = FALSE;
8172 }
8173 }
8174 break;
8175
8176 case R_PPC64_TOC:
8177 /* Relocation value is TOC base. */
8178 relocation = TOCstart;
8179 if (r_symndx == 0)
8180 relocation += htab->stub_group[input_section->id].toc_off;
8181 else if (sec != NULL && !unresolved_reloc)
8182 relocation += htab->stub_group[sec->id].toc_off;
8183 else
8184 unresolved_reloc = TRUE;
8185 goto dodyn2;
8186
8187 /* TOC16 relocs. We want the offset relative to the TOC base,
8188 which is the address of the start of the TOC plus 0x8000.
8189 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8190 in this order. */
8191 case R_PPC64_TOC16:
8192 case R_PPC64_TOC16_LO:
8193 case R_PPC64_TOC16_HI:
8194 case R_PPC64_TOC16_DS:
8195 case R_PPC64_TOC16_LO_DS:
8196 case R_PPC64_TOC16_HA:
8197 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8198 break;
8199
8200 /* Relocate against the beginning of the section. */
8201 case R_PPC64_SECTOFF:
8202 case R_PPC64_SECTOFF_LO:
8203 case R_PPC64_SECTOFF_HI:
8204 case R_PPC64_SECTOFF_DS:
8205 case R_PPC64_SECTOFF_LO_DS:
8206 case R_PPC64_SECTOFF_HA:
8207 if (sec != NULL)
8208 addend -= sec->output_section->vma;
8209 break;
8210
8211 case R_PPC64_REL14:
8212 case R_PPC64_REL14_BRNTAKEN:
8213 case R_PPC64_REL14_BRTAKEN:
8214 case R_PPC64_REL24:
8215 break;
8216
8217 case R_PPC64_TPREL16:
8218 case R_PPC64_TPREL16_LO:
8219 case R_PPC64_TPREL16_HI:
8220 case R_PPC64_TPREL16_HA:
8221 case R_PPC64_TPREL16_DS:
8222 case R_PPC64_TPREL16_LO_DS:
8223 case R_PPC64_TPREL16_HIGHER:
8224 case R_PPC64_TPREL16_HIGHERA:
8225 case R_PPC64_TPREL16_HIGHEST:
8226 case R_PPC64_TPREL16_HIGHESTA:
8227 addend -= htab->tls_sec->vma + TP_OFFSET;
8228 if (info->shared)
8229 /* The TPREL16 relocs shouldn't really be used in shared
8230 libs as they will result in DT_TEXTREL being set, but
8231 support them anyway. */
8232 goto dodyn;
8233 break;
8234
8235 case R_PPC64_DTPREL16:
8236 case R_PPC64_DTPREL16_LO:
8237 case R_PPC64_DTPREL16_HI:
8238 case R_PPC64_DTPREL16_HA:
8239 case R_PPC64_DTPREL16_DS:
8240 case R_PPC64_DTPREL16_LO_DS:
8241 case R_PPC64_DTPREL16_HIGHER:
8242 case R_PPC64_DTPREL16_HIGHERA:
8243 case R_PPC64_DTPREL16_HIGHEST:
8244 case R_PPC64_DTPREL16_HIGHESTA:
8245 addend -= htab->tls_sec->vma + DTP_OFFSET;
8246 break;
8247
8248 case R_PPC64_DTPMOD64:
8249 relocation = 1;
8250 addend = 0;
8251 goto dodyn;
8252
8253 case R_PPC64_TPREL64:
8254 addend -= htab->tls_sec->vma + TP_OFFSET;
8255 goto dodyn;
8256
8257 case R_PPC64_DTPREL64:
8258 addend -= htab->tls_sec->vma + DTP_OFFSET;
8259 /* Fall thru */
8260
8261 /* Relocations that may need to be propagated if this is a
8262 dynamic object. */
8263 case R_PPC64_REL30:
8264 case R_PPC64_REL32:
8265 case R_PPC64_REL64:
8266 case R_PPC64_ADDR14:
8267 case R_PPC64_ADDR14_BRNTAKEN:
8268 case R_PPC64_ADDR14_BRTAKEN:
8269 case R_PPC64_ADDR16:
8270 case R_PPC64_ADDR16_DS:
8271 case R_PPC64_ADDR16_HA:
8272 case R_PPC64_ADDR16_HI:
8273 case R_PPC64_ADDR16_HIGHER:
8274 case R_PPC64_ADDR16_HIGHERA:
8275 case R_PPC64_ADDR16_HIGHEST:
8276 case R_PPC64_ADDR16_HIGHESTA:
8277 case R_PPC64_ADDR16_LO:
8278 case R_PPC64_ADDR16_LO_DS:
8279 case R_PPC64_ADDR24:
8280 case R_PPC64_ADDR32:
8281 case R_PPC64_ADDR64:
8282 case R_PPC64_UADDR16:
8283 case R_PPC64_UADDR32:
8284 case R_PPC64_UADDR64:
8285 /* r_symndx will be zero only for relocs against symbols
8286 from removed linkonce sections, or sections discarded by
8287 a linker script. */
8288 dodyn:
8289 if (r_symndx == 0)
8290 break;
8291 /* Fall thru. */
8292
8293 dodyn2:
8294 if ((input_section->flags & SEC_ALLOC) == 0)
8295 break;
8296
8297 if (NO_OPD_RELOCS && is_opd)
8298 break;
8299
8300 if ((info->shared
8301 && (h == NULL
8302 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8303 || h->root.type != bfd_link_hash_undefweak)
8304 && (MUST_BE_DYN_RELOC (r_type)
8305 || !SYMBOL_CALLS_LOCAL (info, h)))
8306 || (ELIMINATE_COPY_RELOCS
8307 && !info->shared
8308 && h != NULL
8309 && h->dynindx != -1
8310 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8311 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8312 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8313 {
8314 Elf_Internal_Rela outrel;
8315 bfd_boolean skip, relocate;
8316 asection *sreloc;
8317 bfd_byte *loc;
8318 bfd_vma out_off;
8319
8320 /* When generating a dynamic object, these relocations
8321 are copied into the output file to be resolved at run
8322 time. */
8323
8324 skip = FALSE;
8325 relocate = FALSE;
8326
8327 out_off = _bfd_elf_section_offset (output_bfd, info,
8328 input_section, rel->r_offset);
8329 if (out_off == (bfd_vma) -1)
8330 skip = TRUE;
8331 else if (out_off == (bfd_vma) -2)
8332 skip = TRUE, relocate = TRUE;
8333 out_off += (input_section->output_section->vma
8334 + input_section->output_offset);
8335 outrel.r_offset = out_off;
8336 outrel.r_addend = rel->r_addend;
8337
8338 /* Optimize unaligned reloc use. */
8339 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8340 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8341 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8342 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8343 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8344 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8345 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8346 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8347 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8348
8349 if (skip)
8350 memset (&outrel, 0, sizeof outrel);
8351 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8352 && !is_opd
8353 && r_type != R_PPC64_TOC)
8354 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8355 else
8356 {
8357 /* This symbol is local, or marked to become local,
8358 or this is an opd section reloc which must point
8359 at a local function. */
8360 outrel.r_addend += relocation;
8361 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8362 {
8363 if (is_opd && h != NULL)
8364 {
8365 /* Lie about opd entries. This case occurs
8366 when building shared libraries and we
8367 reference a function in another shared
8368 lib. The same thing happens for a weak
8369 definition in an application that's
8370 overridden by a strong definition in a
8371 shared lib. (I believe this is a generic
8372 bug in binutils handling of weak syms.)
8373 In these cases we won't use the opd
8374 entry in this lib. */
8375 unresolved_reloc = FALSE;
8376 }
8377 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8378
8379 /* We need to relocate .opd contents for ld.so.
8380 Prelink also wants simple and consistent rules
8381 for relocs. This make all RELATIVE relocs have
8382 *r_offset equal to r_addend. */
8383 relocate = TRUE;
8384 }
8385 else
8386 {
8387 long indx = 0;
8388
8389 if (bfd_is_abs_section (sec))
8390 ;
8391 else if (sec == NULL || sec->owner == NULL)
8392 {
8393 bfd_set_error (bfd_error_bad_value);
8394 return FALSE;
8395 }
8396 else
8397 {
8398 asection *osec;
8399
8400 osec = sec->output_section;
8401 indx = elf_section_data (osec)->dynindx;
8402
8403 /* We are turning this relocation into one
8404 against a section symbol, so subtract out
8405 the output section's address but not the
8406 offset of the input section in the output
8407 section. */
8408 outrel.r_addend -= osec->vma;
8409 }
8410
8411 outrel.r_info = ELF64_R_INFO (indx, r_type);
8412 }
8413 }
8414
8415 sreloc = elf_section_data (input_section)->sreloc;
8416 if (sreloc == NULL)
8417 abort ();
8418
8419 loc = sreloc->contents;
8420 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8421 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8422
8423 /* If this reloc is against an external symbol, it will
8424 be computed at runtime, so there's no need to do
8425 anything now. However, for the sake of prelink ensure
8426 that the section contents are a known value. */
8427 if (! relocate)
8428 {
8429 unresolved_reloc = FALSE;
8430 /* The value chosen here is quite arbitrary as ld.so
8431 ignores section contents except for the special
8432 case of .opd where the contents might be accessed
8433 before relocation. Choose zero, as that won't
8434 cause reloc overflow. */
8435 relocation = 0;
8436 addend = 0;
8437 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8438 to improve backward compatibility with older
8439 versions of ld. */
8440 if (r_type == R_PPC64_ADDR64)
8441 addend = outrel.r_addend;
8442 /* Adjust pc_relative relocs to have zero in *r_offset. */
8443 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8444 addend = (input_section->output_section->vma
8445 + input_section->output_offset
8446 + rel->r_offset);
8447 }
8448 }
8449 break;
8450
8451 case R_PPC64_COPY:
8452 case R_PPC64_GLOB_DAT:
8453 case R_PPC64_JMP_SLOT:
8454 case R_PPC64_RELATIVE:
8455 /* We shouldn't ever see these dynamic relocs in relocatable
8456 files. */
8457 /* Fall through. */
8458
8459 case R_PPC64_PLTGOT16:
8460 case R_PPC64_PLTGOT16_DS:
8461 case R_PPC64_PLTGOT16_HA:
8462 case R_PPC64_PLTGOT16_HI:
8463 case R_PPC64_PLTGOT16_LO:
8464 case R_PPC64_PLTGOT16_LO_DS:
8465 case R_PPC64_PLTREL32:
8466 case R_PPC64_PLTREL64:
8467 /* These ones haven't been implemented yet. */
8468
8469 (*_bfd_error_handler)
8470 (_("%s: relocation %s is not supported for symbol %s."),
8471 bfd_archive_filename (input_bfd),
8472 ppc64_elf_howto_table[r_type]->name, sym_name);
8473
8474 bfd_set_error (bfd_error_invalid_operation);
8475 ret = FALSE;
8476 continue;
8477 }
8478
8479 /* Do any further special processing. */
8480 switch (r_type)
8481 {
8482 default:
8483 break;
8484
8485 case R_PPC64_ADDR16_HA:
8486 case R_PPC64_ADDR16_HIGHERA:
8487 case R_PPC64_ADDR16_HIGHESTA:
8488 case R_PPC64_GOT16_HA:
8489 case R_PPC64_PLTGOT16_HA:
8490 case R_PPC64_PLT16_HA:
8491 case R_PPC64_TOC16_HA:
8492 case R_PPC64_SECTOFF_HA:
8493 case R_PPC64_TPREL16_HA:
8494 case R_PPC64_DTPREL16_HA:
8495 case R_PPC64_GOT_TLSGD16_HA:
8496 case R_PPC64_GOT_TLSLD16_HA:
8497 case R_PPC64_GOT_TPREL16_HA:
8498 case R_PPC64_GOT_DTPREL16_HA:
8499 case R_PPC64_TPREL16_HIGHER:
8500 case R_PPC64_TPREL16_HIGHERA:
8501 case R_PPC64_TPREL16_HIGHEST:
8502 case R_PPC64_TPREL16_HIGHESTA:
8503 case R_PPC64_DTPREL16_HIGHER:
8504 case R_PPC64_DTPREL16_HIGHERA:
8505 case R_PPC64_DTPREL16_HIGHEST:
8506 case R_PPC64_DTPREL16_HIGHESTA:
8507 /* It's just possible that this symbol is a weak symbol
8508 that's not actually defined anywhere. In that case,
8509 'sec' would be NULL, and we should leave the symbol
8510 alone (it will be set to zero elsewhere in the link). */
8511 if (sec != NULL)
8512 /* Add 0x10000 if sign bit in 0:15 is set.
8513 Bits 0:15 are not used. */
8514 addend += 0x8000;
8515 break;
8516
8517 case R_PPC64_ADDR16_DS:
8518 case R_PPC64_ADDR16_LO_DS:
8519 case R_PPC64_GOT16_DS:
8520 case R_PPC64_GOT16_LO_DS:
8521 case R_PPC64_PLT16_LO_DS:
8522 case R_PPC64_SECTOFF_DS:
8523 case R_PPC64_SECTOFF_LO_DS:
8524 case R_PPC64_TOC16_DS:
8525 case R_PPC64_TOC16_LO_DS:
8526 case R_PPC64_PLTGOT16_DS:
8527 case R_PPC64_PLTGOT16_LO_DS:
8528 case R_PPC64_GOT_TPREL16_DS:
8529 case R_PPC64_GOT_TPREL16_LO_DS:
8530 case R_PPC64_GOT_DTPREL16_DS:
8531 case R_PPC64_GOT_DTPREL16_LO_DS:
8532 case R_PPC64_TPREL16_DS:
8533 case R_PPC64_TPREL16_LO_DS:
8534 case R_PPC64_DTPREL16_DS:
8535 case R_PPC64_DTPREL16_LO_DS:
8536 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8537 mask = 3;
8538 /* If this reloc is against an lq insn, then the value must be
8539 a multiple of 16. This is somewhat of a hack, but the
8540 "correct" way to do this by defining _DQ forms of all the
8541 _DS relocs bloats all reloc switches in this file. It
8542 doesn't seem to make much sense to use any of these relocs
8543 in data, so testing the insn should be safe. */
8544 if ((insn & (0x3f << 26)) == (56u << 26))
8545 mask = 15;
8546 if (((relocation + addend) & mask) != 0)
8547 {
8548 (*_bfd_error_handler)
8549 (_("%s: error: relocation %s not a multiple of %d"),
8550 bfd_archive_filename (input_bfd),
8551 ppc64_elf_howto_table[r_type]->name,
8552 mask + 1);
8553 bfd_set_error (bfd_error_bad_value);
8554 ret = FALSE;
8555 continue;
8556 }
8557 break;
8558
8559 case R_PPC64_REL14:
8560 case R_PPC64_REL14_BRNTAKEN:
8561 case R_PPC64_REL14_BRTAKEN:
8562 max_br_offset = 1 << 15;
8563 goto branch_check;
8564
8565 case R_PPC64_REL24:
8566 max_br_offset = 1 << 25;
8567
8568 branch_check:
8569 /* If the branch is out of reach or the TOC register needs
8570 adjusting, then redirect the call to the local stub for
8571 this function. */
8572 from = (rel->r_offset
8573 + input_section->output_offset
8574 + input_section->output_section->vma);
8575 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8576 || (sec != NULL
8577 && sec->output_section != NULL
8578 && sec->id <= htab->top_id
8579 && (htab->stub_group[sec->id].toc_off
8580 != htab->stub_group[input_section->id].toc_off)))
8581 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8582 rel, htab)) != NULL)
8583 {
8584 /* Munge up the value and addend so that we call the stub
8585 rather than the procedure directly. */
8586 relocation = (stub_entry->stub_offset
8587 + stub_entry->stub_sec->output_offset
8588 + stub_entry->stub_sec->output_section->vma);
8589 addend = 0;
8590 }
8591 break;
8592 }
8593
8594 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8595 because such sections are not SEC_ALLOC and thus ld.so will
8596 not process them. */
8597 if (unresolved_reloc
8598 && !((input_section->flags & SEC_DEBUGGING) != 0
8599 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8600 {
8601 (*_bfd_error_handler)
8602 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8603 bfd_archive_filename (input_bfd),
8604 bfd_get_section_name (input_bfd, input_section),
8605 (long) rel->r_offset,
8606 ppc64_elf_howto_table[(int) r_type]->name,
8607 h->root.root.string);
8608 ret = FALSE;
8609 }
8610
8611 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8612 input_bfd,
8613 input_section,
8614 contents,
8615 rel->r_offset,
8616 relocation,
8617 addend);
8618
8619 if (r != bfd_reloc_ok)
8620 {
8621 if (sym_name == NULL)
8622 sym_name = "(null)";
8623 if (r == bfd_reloc_overflow)
8624 {
8625 if (warned)
8626 continue;
8627 if (h != NULL
8628 && h->root.type == bfd_link_hash_undefweak
8629 && ppc64_elf_howto_table[r_type]->pc_relative)
8630 {
8631 /* Assume this is a call protected by other code that
8632 detects the symbol is undefined. If this is the case,
8633 we can safely ignore the overflow. If not, the
8634 program is hosed anyway, and a little warning isn't
8635 going to help. */
8636
8637 continue;
8638 }
8639
8640 if (!((*info->callbacks->reloc_overflow)
8641 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8642 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8643 return FALSE;
8644 }
8645 else
8646 {
8647 (*_bfd_error_handler)
8648 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8649 bfd_archive_filename (input_bfd),
8650 bfd_get_section_name (input_bfd, input_section),
8651 (long) rel->r_offset,
8652 ppc64_elf_howto_table[r_type]->name,
8653 sym_name,
8654 (int) r);
8655 ret = FALSE;
8656 }
8657 }
8658 }
8659
8660 return ret;
8661 }
8662
8663 /* Finish up dynamic symbol handling. We set the contents of various
8664 dynamic sections here. */
8665
8666 static bfd_boolean
8667 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8668 struct bfd_link_info *info,
8669 struct elf_link_hash_entry *h,
8670 Elf_Internal_Sym *sym)
8671 {
8672 struct ppc_link_hash_table *htab;
8673 bfd *dynobj;
8674
8675 htab = ppc_hash_table (info);
8676 dynobj = htab->elf.dynobj;
8677
8678 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8679 {
8680 struct plt_entry *ent;
8681 Elf_Internal_Rela rela;
8682 bfd_byte *loc;
8683
8684 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8685 if (ent->plt.offset != (bfd_vma) -1)
8686 {
8687 /* This symbol has an entry in the procedure linkage
8688 table. Set it up. */
8689
8690 if (htab->plt == NULL
8691 || htab->relplt == NULL
8692 || htab->glink == NULL)
8693 abort ();
8694
8695 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8696 fill in the PLT entry. */
8697 rela.r_offset = (htab->plt->output_section->vma
8698 + htab->plt->output_offset
8699 + ent->plt.offset);
8700 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8701 rela.r_addend = ent->addend;
8702
8703 loc = htab->relplt->contents;
8704 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8705 * sizeof (Elf64_External_Rela));
8706 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8707 }
8708 }
8709
8710 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8711 {
8712 Elf_Internal_Rela rela;
8713 bfd_byte *loc;
8714
8715 /* This symbol needs a copy reloc. Set it up. */
8716
8717 if (h->dynindx == -1
8718 || (h->root.type != bfd_link_hash_defined
8719 && h->root.type != bfd_link_hash_defweak)
8720 || htab->relbss == NULL)
8721 abort ();
8722
8723 rela.r_offset = (h->root.u.def.value
8724 + h->root.u.def.section->output_section->vma
8725 + h->root.u.def.section->output_offset);
8726 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8727 rela.r_addend = 0;
8728 loc = htab->relbss->contents;
8729 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8730 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8731 }
8732
8733 /* Mark some specially defined symbols as absolute. */
8734 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8735 sym->st_shndx = SHN_ABS;
8736
8737 return TRUE;
8738 }
8739
8740 /* Used to decide how to sort relocs in an optimal manner for the
8741 dynamic linker, before writing them out. */
8742
8743 static enum elf_reloc_type_class
8744 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8745 {
8746 enum elf_ppc64_reloc_type r_type;
8747
8748 r_type = ELF64_R_TYPE (rela->r_info);
8749 switch (r_type)
8750 {
8751 case R_PPC64_RELATIVE:
8752 return reloc_class_relative;
8753 case R_PPC64_JMP_SLOT:
8754 return reloc_class_plt;
8755 case R_PPC64_COPY:
8756 return reloc_class_copy;
8757 default:
8758 return reloc_class_normal;
8759 }
8760 }
8761
8762 /* Finish up the dynamic sections. */
8763
8764 static bfd_boolean
8765 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8766 struct bfd_link_info *info)
8767 {
8768 struct ppc_link_hash_table *htab;
8769 bfd *dynobj;
8770 asection *sdyn;
8771
8772 htab = ppc_hash_table (info);
8773 dynobj = htab->elf.dynobj;
8774 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8775
8776 if (htab->elf.dynamic_sections_created)
8777 {
8778 Elf64_External_Dyn *dyncon, *dynconend;
8779
8780 if (sdyn == NULL || htab->got == NULL)
8781 abort ();
8782
8783 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8784 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8785 for (; dyncon < dynconend; dyncon++)
8786 {
8787 Elf_Internal_Dyn dyn;
8788 asection *s;
8789
8790 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8791
8792 switch (dyn.d_tag)
8793 {
8794 default:
8795 continue;
8796
8797 case DT_PPC64_GLINK:
8798 s = htab->glink;
8799 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8800 /* We stupidly defined DT_PPC64_GLINK to be the start
8801 of glink rather than the first entry point, which is
8802 what ld.so needs, and now have a bigger stub to
8803 support automatic multiple TOCs. */
8804 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8805 break;
8806
8807 case DT_PPC64_OPD:
8808 s = bfd_get_section_by_name (output_bfd, ".opd");
8809 if (s == NULL)
8810 continue;
8811 dyn.d_un.d_ptr = s->vma;
8812 break;
8813
8814 case DT_PPC64_OPDSZ:
8815 s = bfd_get_section_by_name (output_bfd, ".opd");
8816 if (s == NULL)
8817 continue;
8818 dyn.d_un.d_val = s->_raw_size;
8819 break;
8820
8821 case DT_PLTGOT:
8822 s = htab->plt;
8823 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8824 break;
8825
8826 case DT_JMPREL:
8827 s = htab->relplt;
8828 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8829 break;
8830
8831 case DT_PLTRELSZ:
8832 dyn.d_un.d_val = htab->relplt->_raw_size;
8833 break;
8834
8835 case DT_RELASZ:
8836 /* Don't count procedure linkage table relocs in the
8837 overall reloc count. */
8838 s = htab->relplt;
8839 if (s == NULL)
8840 continue;
8841 dyn.d_un.d_val -= s->_raw_size;
8842 break;
8843
8844 case DT_RELA:
8845 /* We may not be using the standard ELF linker script.
8846 If .rela.plt is the first .rela section, we adjust
8847 DT_RELA to not include it. */
8848 s = htab->relplt;
8849 if (s == NULL)
8850 continue;
8851 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8852 continue;
8853 dyn.d_un.d_ptr += s->_raw_size;
8854 break;
8855 }
8856
8857 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8858 }
8859 }
8860
8861 if (htab->got != NULL && htab->got->_raw_size != 0)
8862 {
8863 /* Fill in the first entry in the global offset table.
8864 We use it to hold the link-time TOCbase. */
8865 bfd_put_64 (output_bfd,
8866 elf_gp (output_bfd) + TOC_BASE_OFF,
8867 htab->got->contents);
8868
8869 /* Set .got entry size. */
8870 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8871 }
8872
8873 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8874 {
8875 /* Set .plt entry size. */
8876 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8877 = PLT_ENTRY_SIZE;
8878 }
8879
8880 /* We need to handle writing out multiple GOT sections ourselves,
8881 since we didn't add them to DYNOBJ. */
8882 while ((dynobj = dynobj->link_next) != NULL)
8883 {
8884 asection *s;
8885 s = ppc64_elf_tdata (dynobj)->got;
8886 if (s != NULL
8887 && s->_raw_size != 0
8888 && s->output_section != bfd_abs_section_ptr
8889 && !bfd_set_section_contents (output_bfd, s->output_section,
8890 s->contents, s->output_offset,
8891 s->_raw_size))
8892 return FALSE;
8893 s = ppc64_elf_tdata (dynobj)->relgot;
8894 if (s != NULL
8895 && s->_raw_size != 0
8896 && s->output_section != bfd_abs_section_ptr
8897 && !bfd_set_section_contents (output_bfd, s->output_section,
8898 s->contents, s->output_offset,
8899 s->_raw_size))
8900 return FALSE;
8901 }
8902
8903 return TRUE;
8904 }
8905
8906 #include "elf64-target.h"
GDB Binutils - Deliverables
This page took 0.22187 seconds and 4 git commands to generate.