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Fix compile time warning building iq2000-asm.c
[binutils.git] / bfd / elf64-ppc.c
blob86419b994c9ba657a01b0124c8b7370bf5f20782
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])));
2123 cache_ptr->howto = ppc64_elf_howto_table[type];
2124 }
2125
2126 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 /* If this is a relocatable link (output_bfd test tells us), just
2134 call the generic function. Any adjustment will be done at final
2135 link time. */
2136 if (output_bfd != NULL)
2137 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2138 input_section, output_bfd, error_message);
2139
2140 /* Adjust the addend for sign extension of the low 16 bits.
2141 We won't actually be using the low 16 bits, so trashing them
2142 doesn't matter. */
2143 reloc_entry->addend += 0x8000;
2144 return bfd_reloc_continue;
2145 }
2146
2147 static bfd_reloc_status_type
2148 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2149 void *data, asection *input_section,
2150 bfd *output_bfd, char **error_message)
2151 {
2152 if (output_bfd != NULL)
2153 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2154 input_section, output_bfd, error_message);
2155
2156 if (strcmp (symbol->section->name, ".opd") == 0
2157 && (symbol->section->owner->flags & DYNAMIC) == 0)
2158 {
2159 bfd_vma dest = opd_entry_value (symbol->section,
2160 symbol->value + reloc_entry->addend,
2161 NULL, NULL);
2162 if (dest != (bfd_vma) -1)
2163 reloc_entry->addend = dest - (symbol->value
2164 + symbol->section->output_section->vma
2165 + symbol->section->output_offset);
2166 }
2167 return bfd_reloc_continue;
2168 }
2169
2170 static bfd_reloc_status_type
2171 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2172 void *data, asection *input_section,
2173 bfd *output_bfd, char **error_message)
2174 {
2175 long insn;
2176 enum elf_ppc64_reloc_type r_type;
2177 bfd_size_type octets;
2178 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2179 bfd_boolean is_power4 = FALSE;
2180
2181 /* If this is a relocatable link (output_bfd test tells us), just
2182 call the generic function. Any adjustment will be done at final
2183 link time. */
2184 if (output_bfd != NULL)
2185 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2186 input_section, output_bfd, error_message);
2187
2188 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2189 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2190 insn &= ~(0x01 << 21);
2191 r_type = reloc_entry->howto->type;
2192 if (r_type == R_PPC64_ADDR14_BRTAKEN
2193 || r_type == R_PPC64_REL14_BRTAKEN)
2194 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2195
2196 if (is_power4)
2197 {
2198 /* Set 'a' bit. This is 0b00010 in BO field for branch
2199 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2200 for branch on CTR insns (BO == 1a00t or 1a01t). */
2201 if ((insn & (0x14 << 21)) == (0x04 << 21))
2202 insn |= 0x02 << 21;
2203 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2204 insn |= 0x08 << 21;
2205 else
2206 goto out;
2207 }
2208 else
2209 {
2210 bfd_vma target = 0;
2211 bfd_vma from;
2212
2213 if (!bfd_is_com_section (symbol->section))
2214 target = symbol->value;
2215 target += symbol->section->output_section->vma;
2216 target += symbol->section->output_offset;
2217 target += reloc_entry->addend;
2218
2219 from = (reloc_entry->address
2220 + input_section->output_offset
2221 + input_section->output_section->vma);
2222
2223 /* Invert 'y' bit if not the default. */
2224 if ((bfd_signed_vma) (target - from) < 0)
2225 insn ^= 0x01 << 21;
2226 }
2227 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2228 out:
2229 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2230 input_section, output_bfd, error_message);
2231 }
2232
2233 static bfd_reloc_status_type
2234 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2235 void *data, asection *input_section,
2236 bfd *output_bfd, char **error_message)
2237 {
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 /* Subtract the symbol section base address. */
2246 reloc_entry->addend -= symbol->section->output_section->vma;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 /* If this is a relocatable link (output_bfd test tells us), just
2256 call the generic function. Any adjustment will be done at final
2257 link time. */
2258 if (output_bfd != NULL)
2259 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2260 input_section, output_bfd, error_message);
2261
2262 /* Subtract the symbol section base address. */
2263 reloc_entry->addend -= symbol->section->output_section->vma;
2264
2265 /* Adjust the addend for sign extension of the low 16 bits. */
2266 reloc_entry->addend += 0x8000;
2267 return bfd_reloc_continue;
2268 }
2269
2270 static bfd_reloc_status_type
2271 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2272 void *data, asection *input_section,
2273 bfd *output_bfd, char **error_message)
2274 {
2275 bfd_vma TOCstart;
2276
2277 /* If this is a relocatable link (output_bfd test tells us), just
2278 call the generic function. Any adjustment will be done at final
2279 link time. */
2280 if (output_bfd != NULL)
2281 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2282 input_section, output_bfd, error_message);
2283
2284 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2285 if (TOCstart == 0)
2286 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2287
2288 /* Subtract the TOC base address. */
2289 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2290 return bfd_reloc_continue;
2291 }
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 bfd_vma TOCstart;
2299
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2308 if (TOCstart == 0)
2309 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2310
2311 /* Subtract the TOC base address. */
2312 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2313
2314 /* Adjust the addend for sign extension of the low 16 bits. */
2315 reloc_entry->addend += 0x8000;
2316 return bfd_reloc_continue;
2317 }
2318
2319 static bfd_reloc_status_type
2320 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2321 void *data, asection *input_section,
2322 bfd *output_bfd, char **error_message)
2323 {
2324 bfd_vma TOCstart;
2325 bfd_size_type octets;
2326
2327 /* If this is a relocatable link (output_bfd test tells us), just
2328 call the generic function. Any adjustment will be done at final
2329 link time. */
2330 if (output_bfd != NULL)
2331 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2332 input_section, output_bfd, error_message);
2333
2334 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2335 if (TOCstart == 0)
2336 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2337
2338 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2339 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2340 return bfd_reloc_ok;
2341 }
2342
2343 static bfd_reloc_status_type
2344 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2345 void *data, asection *input_section,
2346 bfd *output_bfd, char **error_message)
2347 {
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 if (error_message != NULL)
2356 {
2357 static char buf[60];
2358 sprintf (buf, "generic linker can't handle %s",
2359 reloc_entry->howto->name);
2360 *error_message = buf;
2361 }
2362 return bfd_reloc_dangerous;
2363 }
2364
2365 struct ppc64_elf_obj_tdata
2366 {
2367 struct elf_obj_tdata elf;
2368
2369 /* Shortcuts to dynamic linker sections. */
2370 asection *got;
2371 asection *relgot;
2372
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2378 sections means we potentially need one of these for each input bfd. */
2379 union {
2380 bfd_signed_vma refcount;
2381 bfd_vma offset;
2382 } tlsld_got;
2383
2384 /* A copy of relocs before they are modified for --emit-relocs. */
2385 Elf_Internal_Rela *opd_relocs;
2386 };
2387
2388 #define ppc64_elf_tdata(bfd) \
2389 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2390
2391 #define ppc64_tlsld_got(bfd) \
2392 (&ppc64_elf_tdata (bfd)->tlsld_got)
2393
2394 /* Override the generic function because we store some extras. */
2395
2396 static bfd_boolean
2397 ppc64_elf_mkobject (bfd *abfd)
2398 {
2399 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2400 abfd->tdata.any = bfd_zalloc (abfd, amt);
2401 if (abfd->tdata.any == NULL)
2402 return FALSE;
2403 return TRUE;
2404 }
2405
2406 /* Return 1 if target is one of ours. */
2407
2408 static bfd_boolean
2409 is_ppc64_elf_target (const struct bfd_target *targ)
2410 {
2411 extern const bfd_target bfd_elf64_powerpc_vec;
2412 extern const bfd_target bfd_elf64_powerpcle_vec;
2413
2414 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2415 }
2416
2417 /* Fix bad default arch selected for a 64 bit input bfd when the
2418 default is 32 bit. */
2419
2420 static bfd_boolean
2421 ppc64_elf_object_p (bfd *abfd)
2422 {
2423 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2424 {
2425 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2426
2427 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2428 {
2429 /* Relies on arch after 32 bit default being 64 bit default. */
2430 abfd->arch_info = abfd->arch_info->next;
2431 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2432 }
2433 }
2434 return TRUE;
2435 }
2436
2437 /* Support for core dump NOTE sections. */
2438
2439 static bfd_boolean
2440 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2441 {
2442 size_t offset, size;
2443
2444 if (note->descsz != 504)
2445 return FALSE;
2446
2447 /* pr_cursig */
2448 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2449
2450 /* pr_pid */
2451 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2452
2453 /* pr_reg */
2454 offset = 112;
2455 size = 384;
2456
2457 /* Make a ".reg/999" section. */
2458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2459 size, note->descpos + offset);
2460 }
2461
2462 static bfd_boolean
2463 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2464 {
2465 if (note->descsz != 136)
2466 return FALSE;
2467
2468 elf_tdata (abfd)->core_program
2469 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2470 elf_tdata (abfd)->core_command
2471 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2472
2473 return TRUE;
2474 }
2475
2476 /* Merge backend specific data from an object file to the output
2477 object file when linking. */
2478
2479 static bfd_boolean
2480 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2481 {
2482 /* Check if we have the same endianess. */
2483 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2484 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2485 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2486 {
2487 const char *msg;
2488
2489 if (bfd_big_endian (ibfd))
2490 msg = _("%B: compiled for a big endian system "
2491 "and target is little endian");
2492 else
2493 msg = _("%B: compiled for a little endian system "
2494 "and target is big endian");
2495
2496 (*_bfd_error_handler) (msg, ibfd);
2497
2498 bfd_set_error (bfd_error_wrong_format);
2499 return FALSE;
2500 }
2501
2502 return TRUE;
2503 }
2504
2505 /* Add extra PPC sections. */
2506
2507 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2508 {
2509 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2510 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2511 { ".plt", 4, 0, SHT_NOBITS, 0 },
2512 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2513 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2514 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 struct _ppc64_elf_section_data
2519 {
2520 struct bfd_elf_section_data elf;
2521
2522 /* An array with one entry for each opd function descriptor. */
2523 union
2524 {
2525 /* Points to the function code section for local opd entries. */
2526 asection **func_sec;
2527 /* After editing .opd, adjust references to opd local syms. */
2528 long *adjust;
2529 } opd;
2530
2531 /* An array for toc sections, indexed by offset/8.
2532 Specifies the relocation symbol index used at a given toc offset. */
2533 unsigned *t_symndx;
2534 };
2535
2536 #define ppc64_elf_section_data(sec) \
2537 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2538
2539 static bfd_boolean
2540 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2541 {
2542 struct _ppc64_elf_section_data *sdata;
2543 bfd_size_type amt = sizeof (*sdata);
2544
2545 sdata = bfd_zalloc (abfd, amt);
2546 if (sdata == NULL)
2547 return FALSE;
2548 sec->used_by_bfd = sdata;
2549
2550 return _bfd_elf_new_section_hook (abfd, sec);
2551 }
2552
2553 static void *
2554 get_opd_info (asection * sec)
2555 {
2556 if (sec != NULL
2557 && ppc64_elf_section_data (sec) != NULL
2558 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2559 return ppc64_elf_section_data (sec)->opd.adjust;
2560 return NULL;
2561 }
2562 \f
2563 /* Parameters for the qsort hook. */
2564 static asection *synthetic_opd;
2565 static bfd_boolean synthetic_relocatable;
2566
2567 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2568
2569 static int
2570 compare_symbols (const void *ap, const void *bp)
2571 {
2572 const asymbol *a = * (const asymbol **) ap;
2573 const asymbol *b = * (const asymbol **) bp;
2574
2575 /* Section symbols first. */
2576 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2577 return -1;
2578 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2579 return 1;
2580
2581 /* then .opd symbols. */
2582 if (a->section == synthetic_opd && b->section != synthetic_opd)
2583 return -1;
2584 if (a->section != synthetic_opd && b->section == synthetic_opd)
2585 return 1;
2586
2587 /* then other code symbols. */
2588 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2589 == (SEC_CODE | SEC_ALLOC)
2590 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2591 != (SEC_CODE | SEC_ALLOC))
2592 return -1;
2593
2594 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2595 != (SEC_CODE | SEC_ALLOC)
2596 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2597 == (SEC_CODE | SEC_ALLOC))
2598 return 1;
2599
2600 if (synthetic_relocatable)
2601 {
2602 if (a->section->id < b->section->id)
2603 return -1;
2604
2605 if (a->section->id > b->section->id)
2606 return 1;
2607 }
2608
2609 if (a->value + a->section->vma < b->value + b->section->vma)
2610 return -1;
2611
2612 if (a->value + a->section->vma > b->value + b->section->vma)
2613 return 1;
2614
2615 return 0;
2616 }
2617
2618 /* Search SYMS for a symbol of the given VALUE. */
2619
2620 static asymbol *
2621 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2622 {
2623 long mid;
2624
2625 if (id == -1)
2626 {
2627 while (lo < hi)
2628 {
2629 mid = (lo + hi) >> 1;
2630 if (syms[mid]->value + syms[mid]->section->vma < value)
2631 lo = mid + 1;
2632 else if (syms[mid]->value + syms[mid]->section->vma > value)
2633 hi = mid;
2634 else
2635 return syms[mid];
2636 }
2637 }
2638 else
2639 {
2640 while (lo < hi)
2641 {
2642 mid = (lo + hi) >> 1;
2643 if (syms[mid]->section->id < id)
2644 lo = mid + 1;
2645 else if (syms[mid]->section->id > id)
2646 hi = mid;
2647 else if (syms[mid]->value < value)
2648 lo = mid + 1;
2649 else if (syms[mid]->value > value)
2650 hi = mid;
2651 else
2652 return syms[mid];
2653 }
2654 }
2655 return NULL;
2656 }
2657
2658 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2659 entry syms. */
2660
2661 static long
2662 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2663 long static_count, asymbol **static_syms,
2664 long dyn_count, asymbol **dyn_syms,
2665 asymbol **ret)
2666 {
2667 asymbol *s;
2668 long i;
2669 long count;
2670 char *names;
2671 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2672 asection *opd;
2673 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2674 asymbol **syms;
2675
2676 *ret = NULL;
2677
2678 opd = bfd_get_section_by_name (abfd, ".opd");
2679 if (opd == NULL)
2680 return 0;
2681
2682 symcount = static_count;
2683 if (!relocatable)
2684 symcount += dyn_count;
2685 if (symcount == 0)
2686 return 0;
2687
2688 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2689 if (syms == NULL)
2690 return 0;
2691
2692 if (!relocatable && static_count != 0 && dyn_count != 0)
2693 {
2694 /* Use both symbol tables. */
2695 memcpy (syms, static_syms, static_count * sizeof (*syms));
2696 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2697 }
2698 else if (!relocatable && static_count == 0)
2699 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2700 else
2701 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2702
2703 synthetic_opd = opd;
2704 synthetic_relocatable = relocatable;
2705 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2706
2707 if (!relocatable && symcount > 1)
2708 {
2709 long j;
2710 /* Trim duplicate syms, since we may have merged the normal and
2711 dynamic symbols. Actually, we only care about syms that have
2712 different values, so trim any with the same value. */
2713 for (i = 1, j = 1; i < symcount; ++i)
2714 if (syms[i - 1]->value + syms[i - 1]->section->vma
2715 != syms[i]->value + syms[i]->section->vma)
2716 syms[j++] = syms[i];
2717 symcount = j;
2718 }
2719
2720 i = 0;
2721 if (syms[i]->section == opd)
2722 ++i;
2723 codesecsym = i;
2724
2725 for (; i < symcount; ++i)
2726 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2727 != (SEC_CODE | SEC_ALLOC))
2728 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2729 break;
2730 codesecsymend = i;
2731
2732 for (; i < symcount; ++i)
2733 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2734 break;
2735 secsymend = i;
2736
2737 for (; i < symcount; ++i)
2738 if (syms[i]->section != opd)
2739 break;
2740 opdsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2744 != (SEC_CODE | SEC_ALLOC))
2745 break;
2746 symcount = i;
2747
2748 count = 0;
2749 if (opdsymend == secsymend)
2750 goto done;
2751
2752 if (relocatable)
2753 {
2754 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2755 arelent *r;
2756 size_t size;
2757 long relcount;
2758
2759 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2760 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2761
2762 if (! relcount
2763 || ! (*slurp_relocs) (abfd, opd, static_syms, FALSE))
2764 goto done;
2765
2766 size = 0;
2767 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2768 {
2769 asymbol *sym;
2770
2771 while (r < opd->relocation + relcount
2772 && r->address < syms[i]->value + opd->vma)
2773 ++r;
2774
2775 if (r == opd->relocation + relcount)
2776 break;
2777
2778 if (r->address != syms[i]->value + opd->vma)
2779 continue;
2780
2781 if (r->howto->type != R_PPC64_ADDR64)
2782 continue;
2783
2784 sym = *r->sym_ptr_ptr;
2785 if (!sym_exists_at (syms, opdsymend, symcount,
2786 sym->section->id, sym->value + r->addend))
2787 {
2788 ++count;
2789 size += sizeof (asymbol);
2790 size += strlen (syms[i]->name) + 2;
2791 }
2792 }
2793
2794 s = *ret = bfd_malloc (size);
2795 if (s == NULL)
2796 {
2797 count = 0;
2798 goto done;
2799 }
2800
2801 names = (char *) (s + count);
2802
2803 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2804 {
2805 asymbol *sym;
2806
2807 while (r < opd->relocation + relcount
2808 && r->address < syms[i]->value + opd->vma)
2809 ++r;
2810
2811 if (r == opd->relocation + relcount)
2812 break;
2813
2814 if (r->address != syms[i]->value + opd->vma)
2815 continue;
2816
2817 if (r->howto->type != R_PPC64_ADDR64)
2818 continue;
2819
2820 sym = *r->sym_ptr_ptr;
2821 if (!sym_exists_at (syms, opdsymend, symcount,
2822 sym->section->id, sym->value + r->addend))
2823 {
2824 size_t len;
2825
2826 *s = *syms[i];
2827 s->section = sym->section;
2828 s->value = sym->value + r->addend;
2829 s->name = names;
2830 *names++ = '.';
2831 len = strlen (syms[i]->name);
2832 memcpy (names, syms[i]->name, len + 1);
2833 names += len + 1;
2834 s++;
2835 }
2836 }
2837 }
2838 else
2839 {
2840 bfd_byte *contents;
2841 size_t size;
2842
2843 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2844 {
2845 if (contents)
2846 {
2847 free_contents_and_exit:
2848 free (contents);
2849 }
2850 goto done;
2851 }
2852
2853 size = 0;
2854 for (i = secsymend; i < opdsymend; ++i)
2855 {
2856 bfd_vma ent;
2857
2858 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2859 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2860 {
2861 ++count;
2862 size += sizeof (asymbol);
2863 size += strlen (syms[i]->name) + 2;
2864 }
2865 }
2866
2867 s = *ret = bfd_malloc (size);
2868 if (s == NULL)
2869 {
2870 count = 0;
2871 goto free_contents_and_exit;
2872 }
2873
2874 names = (char *) (s + count);
2875
2876 for (i = secsymend; i < opdsymend; ++i)
2877 {
2878 bfd_vma ent;
2879
2880 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2881 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2882 {
2883 long lo, hi;
2884 size_t len;
2885 asection *sec = abfd->sections;
2886
2887 *s = *syms[i];
2888 lo = codesecsym;
2889 hi = codesecsymend;
2890 while (lo < hi)
2891 {
2892 long mid = (lo + hi) >> 1;
2893 if (syms[mid]->section->vma < ent)
2894 lo = mid + 1;
2895 else if (syms[mid]->section->vma > ent)
2896 hi = mid;
2897 else
2898 {
2899 sec = syms[mid]->section;
2900 break;
2901 }
2902 }
2903
2904 if (lo >= hi && lo > codesecsym)
2905 sec = syms[lo - 1]->section;
2906
2907 for (; sec != NULL; sec = sec->next)
2908 {
2909 if (sec->vma > ent)
2910 break;
2911 if ((sec->flags & SEC_ALLOC) == 0
2912 || (sec->flags & SEC_LOAD) == 0)
2913 break;
2914 if ((sec->flags & SEC_CODE) != 0)
2915 s->section = sec;
2916 }
2917 s->value = ent - s->section->vma;
2918 s->name = names;
2919 *names++ = '.';
2920 len = strlen (syms[i]->name);
2921 memcpy (names, syms[i]->name, len + 1);
2922 names += len + 1;
2923 s++;
2924 }
2925 }
2926 free (contents);
2927 }
2928
2929 done:
2930 free (syms);
2931 return count;
2932 }
2933 \f
2934 /* The following functions are specific to the ELF linker, while
2935 functions above are used generally. Those named ppc64_elf_* are
2936 called by the main ELF linker code. They appear in this file more
2937 or less in the order in which they are called. eg.
2938 ppc64_elf_check_relocs is called early in the link process,
2939 ppc64_elf_finish_dynamic_sections is one of the last functions
2940 called.
2941
2942 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2943 functions have both a function code symbol and a function descriptor
2944 symbol. A call to foo in a relocatable object file looks like:
2945
2946 . .text
2947 . x:
2948 . bl .foo
2949 . nop
2950
2951 The function definition in another object file might be:
2952
2953 . .section .opd
2954 . foo: .quad .foo
2955 . .quad .TOC.@tocbase
2956 . .quad 0
2957 .
2958 . .text
2959 . .foo: blr
2960
2961 When the linker resolves the call during a static link, the branch
2962 unsurprisingly just goes to .foo and the .opd information is unused.
2963 If the function definition is in a shared library, things are a little
2964 different: The call goes via a plt call stub, the opd information gets
2965 copied to the plt, and the linker patches the nop.
2966
2967 . x:
2968 . bl .foo_stub
2969 . ld 2,40(1)
2970 .
2971 .
2972 . .foo_stub:
2973 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2974 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2975 . std 2,40(1) # this is the general idea
2976 . ld 11,0(12)
2977 . ld 2,8(12)
2978 . mtctr 11
2979 . ld 11,16(12)
2980 . bctr
2981 .
2982 . .section .plt
2983 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2984
2985 The "reloc ()" notation is supposed to indicate that the linker emits
2986 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2987 copying.
2988
2989 What are the difficulties here? Well, firstly, the relocations
2990 examined by the linker in check_relocs are against the function code
2991 sym .foo, while the dynamic relocation in the plt is emitted against
2992 the function descriptor symbol, foo. Somewhere along the line, we need
2993 to carefully copy dynamic link information from one symbol to the other.
2994 Secondly, the generic part of the elf linker will make .foo a dynamic
2995 symbol as is normal for most other backends. We need foo dynamic
2996 instead, at least for an application final link. However, when
2997 creating a shared library containing foo, we need to have both symbols
2998 dynamic so that references to .foo are satisfied during the early
2999 stages of linking. Otherwise the linker might decide to pull in a
3000 definition from some other object, eg. a static library.
3001
3002 Update: As of August 2004, we support a new convention. Function
3003 calls may use the function descriptor symbol, ie. "bl foo". This
3004 behaves exactly as "bl .foo". */
3005
3006 /* The linker needs to keep track of the number of relocs that it
3007 decides to copy as dynamic relocs in check_relocs for each symbol.
3008 This is so that it can later discard them if they are found to be
3009 unnecessary. We store the information in a field extending the
3010 regular ELF linker hash table. */
3011
3012 struct ppc_dyn_relocs
3013 {
3014 struct ppc_dyn_relocs *next;
3015
3016 /* The input section of the reloc. */
3017 asection *sec;
3018
3019 /* Total number of relocs copied for the input section. */
3020 bfd_size_type count;
3021
3022 /* Number of pc-relative relocs copied for the input section. */
3023 bfd_size_type pc_count;
3024 };
3025
3026 /* Track GOT entries needed for a given symbol. We might need more
3027 than one got entry per symbol. */
3028 struct got_entry
3029 {
3030 struct got_entry *next;
3031
3032 /* The symbol addend that we'll be placing in the GOT. */
3033 bfd_vma addend;
3034
3035 /* Unlike other ELF targets, we use separate GOT entries for the same
3036 symbol referenced from different input files. This is to support
3037 automatic multiple TOC/GOT sections, where the TOC base can vary
3038 from one input file to another.
3039
3040 Point to the BFD owning this GOT entry. */
3041 bfd *owner;
3042
3043 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3044 TLS_TPREL or TLS_DTPREL for tls entries. */
3045 char tls_type;
3046
3047 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } got;
3053 };
3054
3055 /* The same for PLT. */
3056 struct plt_entry
3057 {
3058 struct plt_entry *next;
3059
3060 bfd_vma addend;
3061
3062 union
3063 {
3064 bfd_signed_vma refcount;
3065 bfd_vma offset;
3066 } plt;
3067 };
3068
3069 /* Of those relocs that might be copied as dynamic relocs, this macro
3070 selects those that must be copied when linking a shared library,
3071 even when the symbol is local. */
3072
3073 #define MUST_BE_DYN_RELOC(RTYPE) \
3074 ((RTYPE) != R_PPC64_REL32 \
3075 && (RTYPE) != R_PPC64_REL64 \
3076 && (RTYPE) != R_PPC64_REL30)
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. With code that gcc generates, it's vital that this be
3082 enabled; In the PowerPC64 ABI, the address of a function is actually
3083 the address of a function descriptor, which resides in the .opd
3084 section. gcc uses the descriptor directly rather than going via the
3085 GOT as some other ABI's do, which means that initialized function
3086 pointers must reference the descriptor. Thus, a function pointer
3087 initialized to the address of a function in a shared library will
3088 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3089 redefines the function descriptor symbol to point to the copy. This
3090 presents a problem as a plt entry for that function is also
3091 initialized from the function descriptor symbol and the copy reloc
3092 may not be initialized first. */
3093 #define ELIMINATE_COPY_RELOCS 1
3094
3095 /* Section name for stubs is the associated section name plus this
3096 string. */
3097 #define STUB_SUFFIX ".stub"
3098
3099 /* Linker stubs.
3100 ppc_stub_long_branch:
3101 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3102 destination, but a 24 bit branch in a stub section will reach.
3103 . b dest
3104
3105 ppc_stub_plt_branch:
3106 Similar to the above, but a 24 bit branch in the stub section won't
3107 reach its destination.
3108 . addis %r12,%r2,xxx@toc@ha
3109 . ld %r11,xxx@toc@l(%r12)
3110 . mtctr %r11
3111 . bctr
3112
3113 ppc_stub_plt_call:
3114 Used to call a function in a shared library. If it so happens that
3115 the plt entry referenced crosses a 64k boundary, then an extra
3116 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3117 xxx+16 as appropriate.
3118 . addis %r12,%r2,xxx@toc@ha
3119 . std %r2,40(%r1)
3120 . ld %r11,xxx+0@toc@l(%r12)
3121 . ld %r2,xxx+8@toc@l(%r12)
3122 . mtctr %r11
3123 . ld %r11,xxx+16@toc@l(%r12)
3124 . bctr
3125
3126 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3127 code to adjust the value and save r2 to support multiple toc sections.
3128 A ppc_stub_long_branch with an r2 offset looks like:
3129 . std %r2,40(%r1)
3130 . addis %r2,%r2,off@ha
3131 . addi %r2,%r2,off@l
3132 . b dest
3133
3134 A ppc_stub_plt_branch with an r2 offset looks like:
3135 . std %r2,40(%r1)
3136 . addis %r12,%r2,xxx@toc@ha
3137 . ld %r11,xxx@toc@l(%r12)
3138 . addis %r2,%r2,off@ha
3139 . addi %r2,%r2,off@l
3140 . mtctr %r11
3141 . bctr
3142 */
3143
3144 enum ppc_stub_type {
3145 ppc_stub_none,
3146 ppc_stub_long_branch,
3147 ppc_stub_long_branch_r2off,
3148 ppc_stub_plt_branch,
3149 ppc_stub_plt_branch_r2off,
3150 ppc_stub_plt_call
3151 };
3152
3153 struct ppc_stub_hash_entry {
3154
3155 /* Base hash table entry structure. */
3156 struct bfd_hash_entry root;
3157
3158 enum ppc_stub_type stub_type;
3159
3160 /* The stub section. */
3161 asection *stub_sec;
3162
3163 /* Offset within stub_sec of the beginning of this stub. */
3164 bfd_vma stub_offset;
3165
3166 /* Given the symbol's value and its section we can determine its final
3167 value when building the stubs (so the stub knows where to jump. */
3168 bfd_vma target_value;
3169 asection *target_section;
3170
3171 /* The symbol table entry, if any, that this was derived from. */
3172 struct ppc_link_hash_entry *h;
3173
3174 /* And the reloc addend that this was derived from. */
3175 bfd_vma addend;
3176
3177 /* Where this stub is being called from, or, in the case of combined
3178 stub sections, the first input section in the group. */
3179 asection *id_sec;
3180 };
3181
3182 struct ppc_branch_hash_entry {
3183
3184 /* Base hash table entry structure. */
3185 struct bfd_hash_entry root;
3186
3187 /* Offset within .branch_lt. */
3188 unsigned int offset;
3189
3190 /* Generation marker. */
3191 unsigned int iter;
3192 };
3193
3194 struct ppc_link_hash_entry
3195 {
3196 struct elf_link_hash_entry elf;
3197
3198 /* A pointer to the most recently used stub hash entry against this
3199 symbol. */
3200 struct ppc_stub_hash_entry *stub_cache;
3201
3202 /* Track dynamic relocs copied for this symbol. */
3203 struct ppc_dyn_relocs *dyn_relocs;
3204
3205 /* Link between function code and descriptor symbols. */
3206 struct ppc_link_hash_entry *oh;
3207
3208 /* Flag function code and descriptor symbols. */
3209 unsigned int is_func:1;
3210 unsigned int is_func_descriptor:1;
3211 unsigned int fake:1;
3212
3213 /* Whether global opd/toc sym has been adjusted or not.
3214 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3215 should be set for all globals defined in any opd/toc section. */
3216 unsigned int adjust_done:1;
3217
3218 /* Set if we twiddled this symbol to weak at some stage. */
3219 unsigned int was_undefined:1;
3220
3221 /* Contexts in which symbol is used in the GOT (or TOC).
3222 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3223 corresponding relocs are encountered during check_relocs.
3224 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3225 indicate the corresponding GOT entry type is not needed.
3226 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3227 a TPREL one. We use a separate flag rather than setting TPREL
3228 just for convenience in distinguishing the two cases. */
3229 #define TLS_GD 1 /* GD reloc. */
3230 #define TLS_LD 2 /* LD reloc. */
3231 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3232 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3233 #define TLS_TLS 16 /* Any TLS reloc. */
3234 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3235 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3236 char tls_mask;
3237 };
3238
3239 /* ppc64 ELF linker hash table. */
3240
3241 struct ppc_link_hash_table
3242 {
3243 struct elf_link_hash_table elf;
3244
3245 /* The stub hash table. */
3246 struct bfd_hash_table stub_hash_table;
3247
3248 /* Another hash table for plt_branch stubs. */
3249 struct bfd_hash_table branch_hash_table;
3250
3251 /* Linker stub bfd. */
3252 bfd *stub_bfd;
3253
3254 /* Linker call-backs. */
3255 asection * (*add_stub_section) (const char *, asection *);
3256 void (*layout_sections_again) (void);
3257
3258 /* Array to keep track of which stub sections have been created, and
3259 information on stub grouping. */
3260 struct map_stub {
3261 /* This is the section to which stubs in the group will be attached. */
3262 asection *link_sec;
3263 /* The stub section. */
3264 asection *stub_sec;
3265 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3266 bfd_vma toc_off;
3267 } *stub_group;
3268
3269 /* Temp used when calculating TOC pointers. */
3270 bfd_vma toc_curr;
3271
3272 /* Highest input section id. */
3273 int top_id;
3274
3275 /* Highest output section index. */
3276 int top_index;
3277
3278 /* List of input sections for each output section. */
3279 asection **input_list;
3280
3281 /* Short-cuts to get to dynamic linker sections. */
3282 asection *got;
3283 asection *plt;
3284 asection *relplt;
3285 asection *dynbss;
3286 asection *relbss;
3287 asection *glink;
3288 asection *sfpr;
3289 asection *brlt;
3290 asection *relbrlt;
3291
3292 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3293 struct ppc_link_hash_entry *tls_get_addr;
3294 struct ppc_link_hash_entry *tls_get_addr_fd;
3295
3296 /* Statistics. */
3297 unsigned long stub_count[ppc_stub_plt_call];
3298
3299 /* Number of stubs against global syms. */
3300 unsigned long stub_globals;
3301
3302 /* Set if we should emit symbols for stubs. */
3303 unsigned int emit_stub_syms:1;
3304
3305 /* Support for multiple toc sections. */
3306 unsigned int no_multi_toc:1;
3307 unsigned int multi_toc_needed:1;
3308
3309 /* Set on error. */
3310 unsigned int stub_error:1;
3311
3312 /* Flag set when small branches are detected. Used to
3313 select suitable defaults for the stub group size. */
3314 unsigned int has_14bit_branch:1;
3315
3316 /* Temp used by ppc64_elf_check_directives. */
3317 unsigned int twiddled_syms:1;
3318
3319 /* Incremented every time we size stubs. */
3320 unsigned int stub_iteration;
3321
3322 /* Small local sym to section mapping cache. */
3323 struct sym_sec_cache sym_sec;
3324 };
3325
3326 /* Rename some of the generic section flags to better document how they
3327 are used here. */
3328 #define has_toc_reloc has_gp_reloc
3329 #define makes_toc_func_call need_finalize_relax
3330 #define call_check_in_progress reloc_done
3331
3332 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3333
3334 #define ppc_hash_table(p) \
3335 ((struct ppc_link_hash_table *) ((p)->hash))
3336
3337 #define ppc_stub_hash_lookup(table, string, create, copy) \
3338 ((struct ppc_stub_hash_entry *) \
3339 bfd_hash_lookup ((table), (string), (create), (copy)))
3340
3341 #define ppc_branch_hash_lookup(table, string, create, copy) \
3342 ((struct ppc_branch_hash_entry *) \
3343 bfd_hash_lookup ((table), (string), (create), (copy)))
3344
3345 /* Create an entry in the stub hash table. */
3346
3347 static struct bfd_hash_entry *
3348 stub_hash_newfunc (struct bfd_hash_entry *entry,
3349 struct bfd_hash_table *table,
3350 const char *string)
3351 {
3352 /* Allocate the structure if it has not already been allocated by a
3353 subclass. */
3354 if (entry == NULL)
3355 {
3356 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3357 if (entry == NULL)
3358 return entry;
3359 }
3360
3361 /* Call the allocation method of the superclass. */
3362 entry = bfd_hash_newfunc (entry, table, string);
3363 if (entry != NULL)
3364 {
3365 struct ppc_stub_hash_entry *eh;
3366
3367 /* Initialize the local fields. */
3368 eh = (struct ppc_stub_hash_entry *) entry;
3369 eh->stub_type = ppc_stub_none;
3370 eh->stub_sec = NULL;
3371 eh->stub_offset = 0;
3372 eh->target_value = 0;
3373 eh->target_section = NULL;
3374 eh->h = NULL;
3375 eh->id_sec = NULL;
3376 }
3377
3378 return entry;
3379 }
3380
3381 /* Create an entry in the branch hash table. */
3382
3383 static struct bfd_hash_entry *
3384 branch_hash_newfunc (struct bfd_hash_entry *entry,
3385 struct bfd_hash_table *table,
3386 const char *string)
3387 {
3388 /* Allocate the structure if it has not already been allocated by a
3389 subclass. */
3390 if (entry == NULL)
3391 {
3392 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3393 if (entry == NULL)
3394 return entry;
3395 }
3396
3397 /* Call the allocation method of the superclass. */
3398 entry = bfd_hash_newfunc (entry, table, string);
3399 if (entry != NULL)
3400 {
3401 struct ppc_branch_hash_entry *eh;
3402
3403 /* Initialize the local fields. */
3404 eh = (struct ppc_branch_hash_entry *) entry;
3405 eh->offset = 0;
3406 eh->iter = 0;
3407 }
3408
3409 return entry;
3410 }
3411
3412 /* Create an entry in a ppc64 ELF linker hash table. */
3413
3414 static struct bfd_hash_entry *
3415 link_hash_newfunc (struct bfd_hash_entry *entry,
3416 struct bfd_hash_table *table,
3417 const char *string)
3418 {
3419 /* Allocate the structure if it has not already been allocated by a
3420 subclass. */
3421 if (entry == NULL)
3422 {
3423 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3424 if (entry == NULL)
3425 return entry;
3426 }
3427
3428 /* Call the allocation method of the superclass. */
3429 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3430 if (entry != NULL)
3431 {
3432 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3433
3434 memset (&eh->stub_cache, 0,
3435 (sizeof (struct ppc_link_hash_entry)
3436 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3437 }
3438
3439 return entry;
3440 }
3441
3442 /* Create a ppc64 ELF linker hash table. */
3443
3444 static struct bfd_link_hash_table *
3445 ppc64_elf_link_hash_table_create (bfd *abfd)
3446 {
3447 struct ppc_link_hash_table *htab;
3448 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3449
3450 htab = bfd_zmalloc (amt);
3451 if (htab == NULL)
3452 return NULL;
3453
3454 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3455 {
3456 free (htab);
3457 return NULL;
3458 }
3459
3460 /* Init the stub hash table too. */
3461 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3462 return NULL;
3463
3464 /* And the branch hash table. */
3465 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3466 return NULL;
3467
3468 /* Initializing two fields of the union is just cosmetic. We really
3469 only care about glist, but when compiled on a 32-bit host the
3470 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3471 debugger inspection of these fields look nicer. */
3472 htab->elf.init_refcount.refcount = 0;
3473 htab->elf.init_refcount.glist = NULL;
3474 htab->elf.init_offset.offset = 0;
3475 htab->elf.init_offset.glist = NULL;
3476
3477 return &htab->elf.root;
3478 }
3479
3480 /* Free the derived linker hash table. */
3481
3482 static void
3483 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3484 {
3485 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3486
3487 bfd_hash_table_free (&ret->stub_hash_table);
3488 bfd_hash_table_free (&ret->branch_hash_table);
3489 _bfd_generic_link_hash_table_free (hash);
3490 }
3491
3492 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3493
3494 void
3495 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3496 {
3497 struct ppc_link_hash_table *htab;
3498
3499 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3500
3501 /* Always hook our dynamic sections into the first bfd, which is the
3502 linker created stub bfd. This ensures that the GOT header is at
3503 the start of the output TOC section. */
3504 htab = ppc_hash_table (info);
3505 htab->stub_bfd = abfd;
3506 htab->elf.dynobj = abfd;
3507 }
3508
3509 /* Build a name for an entry in the stub hash table. */
3510
3511 static char *
3512 ppc_stub_name (const asection *input_section,
3513 const asection *sym_sec,
3514 const struct ppc_link_hash_entry *h,
3515 const Elf_Internal_Rela *rel)
3516 {
3517 char *stub_name;
3518 bfd_size_type len;
3519
3520 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3521 offsets from a sym as a branch target? In fact, we could
3522 probably assume the addend is always zero. */
3523 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3524
3525 if (h)
3526 {
3527 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3528 stub_name = bfd_malloc (len);
3529 if (stub_name != NULL)
3530 {
3531 sprintf (stub_name, "%08x.%s+%x",
3532 input_section->id & 0xffffffff,
3533 h->elf.root.root.string,
3534 (int) rel->r_addend & 0xffffffff);
3535 }
3536 }
3537 else
3538 {
3539 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3540 stub_name = bfd_malloc (len);
3541 if (stub_name != NULL)
3542 {
3543 sprintf (stub_name, "%08x.%x:%x+%x",
3544 input_section->id & 0xffffffff,
3545 sym_sec->id & 0xffffffff,
3546 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3547 (int) rel->r_addend & 0xffffffff);
3548 }
3549 }
3550 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3551 stub_name[len - 2] = 0;
3552 return stub_name;
3553 }
3554
3555 /* Look up an entry in the stub hash. Stub entries are cached because
3556 creating the stub name takes a bit of time. */
3557
3558 static struct ppc_stub_hash_entry *
3559 ppc_get_stub_entry (const asection *input_section,
3560 const asection *sym_sec,
3561 struct ppc_link_hash_entry *h,
3562 const Elf_Internal_Rela *rel,
3563 struct ppc_link_hash_table *htab)
3564 {
3565 struct ppc_stub_hash_entry *stub_entry;
3566 const asection *id_sec;
3567
3568 /* If this input section is part of a group of sections sharing one
3569 stub section, then use the id of the first section in the group.
3570 Stub names need to include a section id, as there may well be
3571 more than one stub used to reach say, printf, and we need to
3572 distinguish between them. */
3573 id_sec = htab->stub_group[input_section->id].link_sec;
3574
3575 if (h != NULL && h->stub_cache != NULL
3576 && h->stub_cache->h == h
3577 && h->stub_cache->id_sec == id_sec)
3578 {
3579 stub_entry = h->stub_cache;
3580 }
3581 else
3582 {
3583 char *stub_name;
3584
3585 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3586 if (stub_name == NULL)
3587 return NULL;
3588
3589 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3590 stub_name, FALSE, FALSE);
3591 if (h != NULL)
3592 h->stub_cache = stub_entry;
3593
3594 free (stub_name);
3595 }
3596
3597 return stub_entry;
3598 }
3599
3600 /* Add a new stub entry to the stub hash. Not all fields of the new
3601 stub entry are initialised. */
3602
3603 static struct ppc_stub_hash_entry *
3604 ppc_add_stub (const char *stub_name,
3605 asection *section,
3606 struct ppc_link_hash_table *htab)
3607 {
3608 asection *link_sec;
3609 asection *stub_sec;
3610 struct ppc_stub_hash_entry *stub_entry;
3611
3612 link_sec = htab->stub_group[section->id].link_sec;
3613 stub_sec = htab->stub_group[section->id].stub_sec;
3614 if (stub_sec == NULL)
3615 {
3616 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3617 if (stub_sec == NULL)
3618 {
3619 size_t namelen;
3620 bfd_size_type len;
3621 char *s_name;
3622
3623 namelen = strlen (link_sec->name);
3624 len = namelen + sizeof (STUB_SUFFIX);
3625 s_name = bfd_alloc (htab->stub_bfd, len);
3626 if (s_name == NULL)
3627 return NULL;
3628
3629 memcpy (s_name, link_sec->name, namelen);
3630 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3631 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3632 if (stub_sec == NULL)
3633 return NULL;
3634 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3635 }
3636 htab->stub_group[section->id].stub_sec = stub_sec;
3637 }
3638
3639 /* Enter this entry into the linker stub hash table. */
3640 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3641 TRUE, FALSE);
3642 if (stub_entry == NULL)
3643 {
3644 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3645 section->owner, stub_name);
3646 return NULL;
3647 }
3648
3649 stub_entry->stub_sec = stub_sec;
3650 stub_entry->stub_offset = 0;
3651 stub_entry->id_sec = link_sec;
3652 return stub_entry;
3653 }
3654
3655 /* Create sections for linker generated code. */
3656
3657 static bfd_boolean
3658 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3659 {
3660 struct ppc_link_hash_table *htab;
3661 flagword flags;
3662
3663 htab = ppc_hash_table (info);
3664
3665 /* Create .sfpr for code to save and restore fp regs. */
3666 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3667 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3668 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3669 if (htab->sfpr == NULL
3670 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3671 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3672 return FALSE;
3673
3674 /* Create .glink for lazy dynamic linking support. */
3675 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3676 if (htab->glink == NULL
3677 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3678 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3679 return FALSE;
3680
3681 /* Create .branch_lt for plt_branch stubs. */
3682 flags = (SEC_ALLOC | SEC_LOAD
3683 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3684 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3685 if (htab->brlt == NULL
3686 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3687 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3688 return FALSE;
3689
3690 if (info->shared || info->emitrelocations)
3691 {
3692 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3693 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3694 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3695 if (!htab->relbrlt
3696 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3697 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3698 return FALSE;
3699 }
3700 return TRUE;
3701 }
3702
3703 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3704 not already done. */
3705
3706 static bfd_boolean
3707 create_got_section (bfd *abfd, struct bfd_link_info *info)
3708 {
3709 asection *got, *relgot;
3710 flagword flags;
3711 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3712
3713 if (!htab->got)
3714 {
3715 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3716 return FALSE;
3717
3718 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3719 if (!htab->got)
3720 abort ();
3721 }
3722
3723 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3724 | SEC_LINKER_CREATED);
3725
3726 got = bfd_make_section (abfd, ".got");
3727 if (!got
3728 || !bfd_set_section_flags (abfd, got, flags)
3729 || !bfd_set_section_alignment (abfd, got, 3))
3730 return FALSE;
3731
3732 relgot = bfd_make_section (abfd, ".rela.got");
3733 if (!relgot
3734 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3735 || ! bfd_set_section_alignment (abfd, relgot, 3))
3736 return FALSE;
3737
3738 ppc64_elf_tdata (abfd)->got = got;
3739 ppc64_elf_tdata (abfd)->relgot = relgot;
3740 return TRUE;
3741 }
3742
3743 /* Create the dynamic sections, and set up shortcuts. */
3744
3745 static bfd_boolean
3746 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3747 {
3748 struct ppc_link_hash_table *htab;
3749
3750 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3751 return FALSE;
3752
3753 htab = ppc_hash_table (info);
3754 if (!htab->got)
3755 htab->got = bfd_get_section_by_name (dynobj, ".got");
3756 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3757 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3758 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3759 if (!info->shared)
3760 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3761
3762 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3763 || (!info->shared && !htab->relbss))
3764 abort ();
3765
3766 return TRUE;
3767 }
3768
3769 /* Merge PLT info on FROM with that on TO. */
3770
3771 static void
3772 move_plt_plist (struct ppc_link_hash_entry *from,
3773 struct ppc_link_hash_entry *to)
3774 {
3775 if (from->elf.plt.plist != NULL)
3776 {
3777 if (to->elf.plt.plist != NULL)
3778 {
3779 struct plt_entry **entp;
3780 struct plt_entry *ent;
3781
3782 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3783 {
3784 struct plt_entry *dent;
3785
3786 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3787 if (dent->addend == ent->addend)
3788 {
3789 dent->plt.refcount += ent->plt.refcount;
3790 *entp = ent->next;
3791 break;
3792 }
3793 if (dent == NULL)
3794 entp = &ent->next;
3795 }
3796 *entp = to->elf.plt.plist;
3797 }
3798
3799 to->elf.plt.plist = from->elf.plt.plist;
3800 from->elf.plt.plist = NULL;
3801 }
3802 }
3803
3804 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3805
3806 static void
3807 ppc64_elf_copy_indirect_symbol
3808 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3809 struct elf_link_hash_entry *dir,
3810 struct elf_link_hash_entry *ind)
3811 {
3812 struct ppc_link_hash_entry *edir, *eind;
3813
3814 edir = (struct ppc_link_hash_entry *) dir;
3815 eind = (struct ppc_link_hash_entry *) ind;
3816
3817 /* Copy over any dynamic relocs we may have on the indirect sym. */
3818 if (eind->dyn_relocs != NULL)
3819 {
3820 if (edir->dyn_relocs != NULL)
3821 {
3822 struct ppc_dyn_relocs **pp;
3823 struct ppc_dyn_relocs *p;
3824
3825 if (eind->elf.root.type == bfd_link_hash_indirect)
3826 abort ();
3827
3828 /* Add reloc counts against the weak sym to the strong sym
3829 list. Merge any entries against the same section. */
3830 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3831 {
3832 struct ppc_dyn_relocs *q;
3833
3834 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3835 if (q->sec == p->sec)
3836 {
3837 q->pc_count += p->pc_count;
3838 q->count += p->count;
3839 *pp = p->next;
3840 break;
3841 }
3842 if (q == NULL)
3843 pp = &p->next;
3844 }
3845 *pp = edir->dyn_relocs;
3846 }
3847
3848 edir->dyn_relocs = eind->dyn_relocs;
3849 eind->dyn_relocs = NULL;
3850 }
3851
3852 edir->is_func |= eind->is_func;
3853 edir->is_func_descriptor |= eind->is_func_descriptor;
3854 edir->tls_mask |= eind->tls_mask;
3855
3856 /* If called to transfer flags for a weakdef during processing
3857 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3858 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3859 if (!(ELIMINATE_COPY_RELOCS
3860 && eind->elf.root.type != bfd_link_hash_indirect
3861 && edir->elf.dynamic_adjusted))
3862 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3863
3864 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3865 edir->elf.ref_regular |= eind->elf.ref_regular;
3866 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3867 edir->elf.needs_plt |= eind->elf.needs_plt;
3868
3869 /* If we were called to copy over info for a weak sym, that's all. */
3870 if (eind->elf.root.type != bfd_link_hash_indirect)
3871 return;
3872
3873 /* Copy over got entries that we may have already seen to the
3874 symbol which just became indirect. */
3875 if (eind->elf.got.glist != NULL)
3876 {
3877 if (edir->elf.got.glist != NULL)
3878 {
3879 struct got_entry **entp;
3880 struct got_entry *ent;
3881
3882 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3883 {
3884 struct got_entry *dent;
3885
3886 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3887 if (dent->addend == ent->addend
3888 && dent->owner == ent->owner
3889 && dent->tls_type == ent->tls_type)
3890 {
3891 dent->got.refcount += ent->got.refcount;
3892 *entp = ent->next;
3893 break;
3894 }
3895 if (dent == NULL)
3896 entp = &ent->next;
3897 }
3898 *entp = edir->elf.got.glist;
3899 }
3900
3901 edir->elf.got.glist = eind->elf.got.glist;
3902 eind->elf.got.glist = NULL;
3903 }
3904
3905 /* And plt entries. */
3906 move_plt_plist (eind, edir);
3907
3908 if (edir->elf.dynindx == -1)
3909 {
3910 edir->elf.dynindx = eind->elf.dynindx;
3911 edir->elf.dynstr_index = eind->elf.dynstr_index;
3912 eind->elf.dynindx = -1;
3913 eind->elf.dynstr_index = 0;
3914 }
3915 else
3916 BFD_ASSERT (eind->elf.dynindx == -1);
3917 }
3918
3919 /* Find the function descriptor hash entry from the given function code
3920 hash entry FH. Link the entries via their OH fields. */
3921
3922 static struct ppc_link_hash_entry *
3923 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3924 {
3925 struct ppc_link_hash_entry *fdh = fh->oh;
3926
3927 if (fdh == NULL)
3928 {
3929 const char *fd_name = fh->elf.root.root.string + 1;
3930
3931 fdh = (struct ppc_link_hash_entry *)
3932 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3933 if (fdh != NULL)
3934 {
3935 fdh->is_func_descriptor = 1;
3936 fdh->oh = fh;
3937 fh->is_func = 1;
3938 fh->oh = fdh;
3939 }
3940 }
3941
3942 return fdh;
3943 }
3944
3945 /* Make a fake function descriptor sym for the code sym FH. */
3946
3947 static struct ppc_link_hash_entry *
3948 make_fdh (struct bfd_link_info *info,
3949 struct ppc_link_hash_entry *fh)
3950 {
3951 bfd *abfd;
3952 asymbol *newsym;
3953 struct bfd_link_hash_entry *bh;
3954 struct ppc_link_hash_entry *fdh;
3955
3956 abfd = fh->elf.root.u.undef.abfd;
3957 newsym = bfd_make_empty_symbol (abfd);
3958 newsym->name = fh->elf.root.root.string + 1;
3959 newsym->section = bfd_und_section_ptr;
3960 newsym->value = 0;
3961 newsym->flags = BSF_WEAK;
3962
3963 bh = NULL;
3964 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
3965 newsym->flags, newsym->section,
3966 newsym->value, NULL, FALSE, FALSE,
3967 &bh))
3968 return NULL;
3969
3970 fdh = (struct ppc_link_hash_entry *) bh;
3971 fdh->elf.non_elf = 0;
3972 fdh->fake = 1;
3973 fdh->is_func_descriptor = 1;
3974 fdh->oh = fh;
3975 fh->is_func = 1;
3976 fh->oh = fdh;
3977 return fdh;
3978 }
3979
3980 /* Hacks to support old ABI code.
3981 When making function calls, old ABI code references function entry
3982 points (dot symbols), while new ABI code references the function
3983 descriptor symbol. We need to make any combination of reference and
3984 definition work together, without breaking archive linking.
3985
3986 For a defined function "foo" and an undefined call to "bar":
3987 An old object defines "foo" and ".foo", references ".bar" (possibly
3988 "bar" too).
3989 A new object defines "foo" and references "bar".
3990
3991 A new object thus has no problem with its undefined symbols being
3992 satisfied by definitions in an old object. On the other hand, the
3993 old object won't have ".bar" satisfied by a new object. */
3994
3995 /* Fix function descriptor symbols defined in .opd sections to be
3996 function type. */
3997
3998 static bfd_boolean
3999 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4000 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4001 Elf_Internal_Sym *isym,
4002 const char **name ATTRIBUTE_UNUSED,
4003 flagword *flags ATTRIBUTE_UNUSED,
4004 asection **sec,
4005 bfd_vma *value ATTRIBUTE_UNUSED)
4006 {
4007 if (*sec != NULL
4008 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4009 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4010 return TRUE;
4011 }
4012
4013 /* This function makes an old ABI object reference to ".bar" cause the
4014 inclusion of a new ABI object archive that defines "bar".
4015 NAME is a symbol defined in an archive. Return a symbol in the hash
4016 table that might be satisfied by the archive symbols. */
4017
4018 static struct elf_link_hash_entry *
4019 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4020 struct bfd_link_info *info,
4021 const char *name)
4022 {
4023 struct elf_link_hash_entry *h;
4024 char *dot_name;
4025 size_t len;
4026
4027 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4028 if (h != NULL
4029 /* Don't return this sym if it is a fake function descriptor
4030 created by add_symbol_adjust. */
4031 && !(h->root.type == bfd_link_hash_undefweak
4032 && ((struct ppc_link_hash_entry *) h)->fake))
4033 return h;
4034
4035 if (name[0] == '.')
4036 return h;
4037
4038 len = strlen (name);
4039 dot_name = bfd_alloc (abfd, len + 2);
4040 if (dot_name == NULL)
4041 return (struct elf_link_hash_entry *) 0 - 1;
4042 dot_name[0] = '.';
4043 memcpy (dot_name + 1, name, len + 1);
4044 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4045 bfd_release (abfd, dot_name);
4046 return h;
4047 }
4048
4049 /* This function satisfies all old ABI object references to ".bar" if a
4050 new ABI object defines "bar". Well, at least, undefined dot symbols
4051 are made weak. This stops later archive searches from including an
4052 object if we already have a function descriptor definition. It also
4053 prevents the linker complaining about undefined symbols.
4054 We also check and correct mismatched symbol visibility here. The
4055 most restrictive visibility of the function descriptor and the
4056 function entry symbol is used. */
4057
4058 struct add_symbol_adjust_data
4059 {
4060 struct bfd_link_info *info;
4061 bfd_boolean ok;
4062 };
4063
4064 static bfd_boolean
4065 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4066 {
4067 struct add_symbol_adjust_data *data;
4068 struct ppc_link_hash_table *htab;
4069 struct ppc_link_hash_entry *eh;
4070 struct ppc_link_hash_entry *fdh;
4071
4072 if (h->root.type == bfd_link_hash_indirect)
4073 return TRUE;
4074
4075 if (h->root.type == bfd_link_hash_warning)
4076 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4077
4078 if (h->root.root.string[0] != '.')
4079 return TRUE;
4080
4081 data = inf;
4082 htab = ppc_hash_table (data->info);
4083 eh = (struct ppc_link_hash_entry *) h;
4084 fdh = get_fdh (eh, htab);
4085 if (fdh == NULL
4086 && !data->info->relocatable
4087 && (eh->elf.root.type == bfd_link_hash_undefined
4088 || eh->elf.root.type == bfd_link_hash_undefweak)
4089 && eh->elf.ref_regular)
4090 {
4091 /* Make an undefweak function descriptor sym, which is enough to
4092 pull in an --as-needed shared lib, but won't cause link
4093 errors. Archives are handled elsewhere. */
4094 fdh = make_fdh (data->info, eh);
4095 if (fdh == NULL)
4096 data->ok = FALSE;
4097 else
4098 fdh->elf.ref_regular = 1;
4099 }
4100 else if (fdh != NULL
4101 && (fdh->elf.root.type == bfd_link_hash_defined
4102 || fdh->elf.root.type == bfd_link_hash_defweak))
4103 {
4104 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4105 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4106 if (entry_vis < descr_vis)
4107 fdh->elf.other += entry_vis - descr_vis;
4108 else if (entry_vis > descr_vis)
4109 eh->elf.other += descr_vis - entry_vis;
4110
4111 if (eh->elf.root.type == bfd_link_hash_undefined)
4112 {
4113 eh->elf.root.type = bfd_link_hash_undefweak;
4114 eh->was_undefined = 1;
4115 htab->twiddled_syms = 1;
4116 }
4117 }
4118
4119 return TRUE;
4120 }
4121
4122 static bfd_boolean
4123 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4124 struct bfd_link_info *info)
4125 {
4126 struct ppc_link_hash_table *htab;
4127 struct add_symbol_adjust_data data;
4128
4129 htab = ppc_hash_table (info);
4130 if (!is_ppc64_elf_target (htab->elf.root.creator))
4131 return TRUE;
4132
4133 data.info = info;
4134 data.ok = TRUE;
4135 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4136
4137 /* We need to fix the undefs list for any syms we have twiddled to
4138 undef_weak. */
4139 if (htab->twiddled_syms)
4140 {
4141 bfd_link_repair_undef_list (&htab->elf.root);
4142 htab->twiddled_syms = 0;
4143 }
4144 return data.ok;
4145 }
4146
4147 static bfd_boolean
4148 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4149 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4150 {
4151 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4152 char *local_got_tls_masks;
4153
4154 if (local_got_ents == NULL)
4155 {
4156 bfd_size_type size = symtab_hdr->sh_info;
4157
4158 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4159 local_got_ents = bfd_zalloc (abfd, size);
4160 if (local_got_ents == NULL)
4161 return FALSE;
4162 elf_local_got_ents (abfd) = local_got_ents;
4163 }
4164
4165 if ((tls_type & TLS_EXPLICIT) == 0)
4166 {
4167 struct got_entry *ent;
4168
4169 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4170 if (ent->addend == r_addend
4171 && ent->owner == abfd
4172 && ent->tls_type == tls_type)
4173 break;
4174 if (ent == NULL)
4175 {
4176 bfd_size_type amt = sizeof (*ent);
4177 ent = bfd_alloc (abfd, amt);
4178 if (ent == NULL)
4179 return FALSE;
4180 ent->next = local_got_ents[r_symndx];
4181 ent->addend = r_addend;
4182 ent->owner = abfd;
4183 ent->tls_type = tls_type;
4184 ent->got.refcount = 0;
4185 local_got_ents[r_symndx] = ent;
4186 }
4187 ent->got.refcount += 1;
4188 }
4189
4190 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4191 local_got_tls_masks[r_symndx] |= tls_type;
4192 return TRUE;
4193 }
4194
4195 static bfd_boolean
4196 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4197 {
4198 struct plt_entry *ent;
4199
4200 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4201 if (ent->addend == addend)
4202 break;
4203 if (ent == NULL)
4204 {
4205 bfd_size_type amt = sizeof (*ent);
4206 ent = bfd_alloc (abfd, amt);
4207 if (ent == NULL)
4208 return FALSE;
4209 ent->next = eh->elf.plt.plist;
4210 ent->addend = addend;
4211 ent->plt.refcount = 0;
4212 eh->elf.plt.plist = ent;
4213 }
4214 ent->plt.refcount += 1;
4215 eh->elf.needs_plt = 1;
4216 eh->is_func = 1;
4217 return TRUE;
4218 }
4219
4220 /* Look through the relocs for a section during the first phase, and
4221 calculate needed space in the global offset table, procedure
4222 linkage table, and dynamic reloc sections. */
4223
4224 static bfd_boolean
4225 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4226 asection *sec, const Elf_Internal_Rela *relocs)
4227 {
4228 struct ppc_link_hash_table *htab;
4229 Elf_Internal_Shdr *symtab_hdr;
4230 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4231 const Elf_Internal_Rela *rel;
4232 const Elf_Internal_Rela *rel_end;
4233 asection *sreloc;
4234 asection **opd_sym_map;
4235
4236 if (info->relocatable)
4237 return TRUE;
4238
4239 /* Don't do anything special with non-loaded, non-alloced sections.
4240 In particular, any relocs in such sections should not affect GOT
4241 and PLT reference counting (ie. we don't allow them to create GOT
4242 or PLT entries), there's no possibility or desire to optimize TLS
4243 relocs, and there's not much point in propagating relocs to shared
4244 libs that the dynamic linker won't relocate. */
4245 if ((sec->flags & SEC_ALLOC) == 0)
4246 return TRUE;
4247
4248 htab = ppc_hash_table (info);
4249 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4250
4251 sym_hashes = elf_sym_hashes (abfd);
4252 sym_hashes_end = (sym_hashes
4253 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4254 - symtab_hdr->sh_info);
4255
4256 sreloc = NULL;
4257 opd_sym_map = NULL;
4258 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4259 {
4260 /* Garbage collection needs some extra help with .opd sections.
4261 We don't want to necessarily keep everything referenced by
4262 relocs in .opd, as that would keep all functions. Instead,
4263 if we reference an .opd symbol (a function descriptor), we
4264 want to keep the function code symbol's section. This is
4265 easy for global symbols, but for local syms we need to keep
4266 information about the associated function section. Later, if
4267 edit_opd deletes entries, we'll use this array to adjust
4268 local syms in .opd. */
4269 union opd_info {
4270 asection *func_section;
4271 long entry_adjust;
4272 };
4273 bfd_size_type amt;
4274
4275 amt = sec->size * sizeof (union opd_info) / 8;
4276 opd_sym_map = bfd_zalloc (abfd, amt);
4277 if (opd_sym_map == NULL)
4278 return FALSE;
4279 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4280 }
4281
4282 if (htab->sfpr == NULL
4283 && !create_linkage_sections (htab->elf.dynobj, info))
4284 return FALSE;
4285
4286 rel_end = relocs + sec->reloc_count;
4287 for (rel = relocs; rel < rel_end; rel++)
4288 {
4289 unsigned long r_symndx;
4290 struct elf_link_hash_entry *h;
4291 enum elf_ppc64_reloc_type r_type;
4292 int tls_type = 0;
4293
4294 r_symndx = ELF64_R_SYM (rel->r_info);
4295 if (r_symndx < symtab_hdr->sh_info)
4296 h = NULL;
4297 else
4298 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4299
4300 r_type = ELF64_R_TYPE (rel->r_info);
4301 switch (r_type)
4302 {
4303 case R_PPC64_GOT_TLSLD16:
4304 case R_PPC64_GOT_TLSLD16_LO:
4305 case R_PPC64_GOT_TLSLD16_HI:
4306 case R_PPC64_GOT_TLSLD16_HA:
4307 ppc64_tlsld_got (abfd)->refcount += 1;
4308 tls_type = TLS_TLS | TLS_LD;
4309 goto dogottls;
4310
4311 case R_PPC64_GOT_TLSGD16:
4312 case R_PPC64_GOT_TLSGD16_LO:
4313 case R_PPC64_GOT_TLSGD16_HI:
4314 case R_PPC64_GOT_TLSGD16_HA:
4315 tls_type = TLS_TLS | TLS_GD;
4316 goto dogottls;
4317
4318 case R_PPC64_GOT_TPREL16_DS:
4319 case R_PPC64_GOT_TPREL16_LO_DS:
4320 case R_PPC64_GOT_TPREL16_HI:
4321 case R_PPC64_GOT_TPREL16_HA:
4322 if (info->shared)
4323 info->flags |= DF_STATIC_TLS;
4324 tls_type = TLS_TLS | TLS_TPREL;
4325 goto dogottls;
4326
4327 case R_PPC64_GOT_DTPREL16_DS:
4328 case R_PPC64_GOT_DTPREL16_LO_DS:
4329 case R_PPC64_GOT_DTPREL16_HI:
4330 case R_PPC64_GOT_DTPREL16_HA:
4331 tls_type = TLS_TLS | TLS_DTPREL;
4332 dogottls:
4333 sec->has_tls_reloc = 1;
4334 /* Fall thru */
4335
4336 case R_PPC64_GOT16:
4337 case R_PPC64_GOT16_DS:
4338 case R_PPC64_GOT16_HA:
4339 case R_PPC64_GOT16_HI:
4340 case R_PPC64_GOT16_LO:
4341 case R_PPC64_GOT16_LO_DS:
4342 /* This symbol requires a global offset table entry. */
4343 sec->has_toc_reloc = 1;
4344 if (ppc64_elf_tdata (abfd)->got == NULL
4345 && !create_got_section (abfd, info))
4346 return FALSE;
4347
4348 if (h != NULL)
4349 {
4350 struct ppc_link_hash_entry *eh;
4351 struct got_entry *ent;
4352
4353 eh = (struct ppc_link_hash_entry *) h;
4354 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4355 if (ent->addend == rel->r_addend
4356 && ent->owner == abfd
4357 && ent->tls_type == tls_type)
4358 break;
4359 if (ent == NULL)
4360 {
4361 bfd_size_type amt = sizeof (*ent);
4362 ent = bfd_alloc (abfd, amt);
4363 if (ent == NULL)
4364 return FALSE;
4365 ent->next = eh->elf.got.glist;
4366 ent->addend = rel->r_addend;
4367 ent->owner = abfd;
4368 ent->tls_type = tls_type;
4369 ent->got.refcount = 0;
4370 eh->elf.got.glist = ent;
4371 }
4372 ent->got.refcount += 1;
4373 eh->tls_mask |= tls_type;
4374 }
4375 else
4376 /* This is a global offset table entry for a local symbol. */
4377 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4378 rel->r_addend, tls_type))
4379 return FALSE;
4380 break;
4381
4382 case R_PPC64_PLT16_HA:
4383 case R_PPC64_PLT16_HI:
4384 case R_PPC64_PLT16_LO:
4385 case R_PPC64_PLT32:
4386 case R_PPC64_PLT64:
4387 /* This symbol requires a procedure linkage table entry. We
4388 actually build the entry in adjust_dynamic_symbol,
4389 because this might be a case of linking PIC code without
4390 linking in any dynamic objects, in which case we don't
4391 need to generate a procedure linkage table after all. */
4392 if (h == NULL)
4393 {
4394 /* It does not make sense to have a procedure linkage
4395 table entry for a local symbol. */
4396 bfd_set_error (bfd_error_bad_value);
4397 return FALSE;
4398 }
4399 else
4400 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4401 rel->r_addend))
4402 return FALSE;
4403 break;
4404
4405 /* The following relocations don't need to propagate the
4406 relocation if linking a shared object since they are
4407 section relative. */
4408 case R_PPC64_SECTOFF:
4409 case R_PPC64_SECTOFF_LO:
4410 case R_PPC64_SECTOFF_HI:
4411 case R_PPC64_SECTOFF_HA:
4412 case R_PPC64_SECTOFF_DS:
4413 case R_PPC64_SECTOFF_LO_DS:
4414 case R_PPC64_DTPREL16:
4415 case R_PPC64_DTPREL16_LO:
4416 case R_PPC64_DTPREL16_HI:
4417 case R_PPC64_DTPREL16_HA:
4418 case R_PPC64_DTPREL16_DS:
4419 case R_PPC64_DTPREL16_LO_DS:
4420 case R_PPC64_DTPREL16_HIGHER:
4421 case R_PPC64_DTPREL16_HIGHERA:
4422 case R_PPC64_DTPREL16_HIGHEST:
4423 case R_PPC64_DTPREL16_HIGHESTA:
4424 break;
4425
4426 /* Nor do these. */
4427 case R_PPC64_TOC16:
4428 case R_PPC64_TOC16_LO:
4429 case R_PPC64_TOC16_HI:
4430 case R_PPC64_TOC16_HA:
4431 case R_PPC64_TOC16_DS:
4432 case R_PPC64_TOC16_LO_DS:
4433 sec->has_toc_reloc = 1;
4434 break;
4435
4436 /* This relocation describes the C++ object vtable hierarchy.
4437 Reconstruct it for later use during GC. */
4438 case R_PPC64_GNU_VTINHERIT:
4439 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4440 return FALSE;
4441 break;
4442
4443 /* This relocation describes which C++ vtable entries are actually
4444 used. Record for later use during GC. */
4445 case R_PPC64_GNU_VTENTRY:
4446 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4447 return FALSE;
4448 break;
4449
4450 case R_PPC64_REL14:
4451 case R_PPC64_REL14_BRTAKEN:
4452 case R_PPC64_REL14_BRNTAKEN:
4453 htab->has_14bit_branch = 1;
4454 /* Fall through. */
4455
4456 case R_PPC64_REL24:
4457 if (h != NULL)
4458 {
4459 /* We may need a .plt entry if the function this reloc
4460 refers to is in a shared lib. */
4461 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4462 rel->r_addend))
4463 return FALSE;
4464 if (h == &htab->tls_get_addr->elf
4465 || h == &htab->tls_get_addr_fd->elf)
4466 sec->has_tls_reloc = 1;
4467 else if (htab->tls_get_addr == NULL
4468 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4469 && (h->root.root.string[15] == 0
4470 || h->root.root.string[15] == '@'))
4471 {
4472 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4473 sec->has_tls_reloc = 1;
4474 }
4475 else if (htab->tls_get_addr_fd == NULL
4476 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4477 && (h->root.root.string[14] == 0
4478 || h->root.root.string[14] == '@'))
4479 {
4480 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4481 sec->has_tls_reloc = 1;
4482 }
4483 }
4484 break;
4485
4486 case R_PPC64_TPREL64:
4487 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4488 if (info->shared)
4489 info->flags |= DF_STATIC_TLS;
4490 goto dotlstoc;
4491
4492 case R_PPC64_DTPMOD64:
4493 if (rel + 1 < rel_end
4494 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4495 && rel[1].r_offset == rel->r_offset + 8)
4496 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4497 else
4498 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4499 goto dotlstoc;
4500
4501 case R_PPC64_DTPREL64:
4502 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4503 if (rel != relocs
4504 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4505 && rel[-1].r_offset == rel->r_offset - 8)
4506 /* This is the second reloc of a dtpmod, dtprel pair.
4507 Don't mark with TLS_DTPREL. */
4508 goto dodyn;
4509
4510 dotlstoc:
4511 sec->has_tls_reloc = 1;
4512 if (h != NULL)
4513 {
4514 struct ppc_link_hash_entry *eh;
4515 eh = (struct ppc_link_hash_entry *) h;
4516 eh->tls_mask |= tls_type;
4517 }
4518 else
4519 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4520 rel->r_addend, tls_type))
4521 return FALSE;
4522
4523 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4524 {
4525 /* One extra to simplify get_tls_mask. */
4526 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4527 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4528 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4529 return FALSE;
4530 }
4531 BFD_ASSERT (rel->r_offset % 8 == 0);
4532 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4533
4534 /* Mark the second slot of a GD or LD entry.
4535 -1 to indicate GD and -2 to indicate LD. */
4536 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4537 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4538 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4539 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4540 goto dodyn;
4541
4542 case R_PPC64_TPREL16:
4543 case R_PPC64_TPREL16_LO:
4544 case R_PPC64_TPREL16_HI:
4545 case R_PPC64_TPREL16_HA:
4546 case R_PPC64_TPREL16_DS:
4547 case R_PPC64_TPREL16_LO_DS:
4548 case R_PPC64_TPREL16_HIGHER:
4549 case R_PPC64_TPREL16_HIGHERA:
4550 case R_PPC64_TPREL16_HIGHEST:
4551 case R_PPC64_TPREL16_HIGHESTA:
4552 if (info->shared)
4553 {
4554 info->flags |= DF_STATIC_TLS;
4555 goto dodyn;
4556 }
4557 break;
4558
4559 case R_PPC64_ADDR64:
4560 if (opd_sym_map != NULL
4561 && rel + 1 < rel_end
4562 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4563 {
4564 if (h != NULL)
4565 {
4566 if (h->root.root.string[0] == '.'
4567 && h->root.root.string[1] != 0
4568 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4569 ;
4570 else
4571 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4572 }
4573 else
4574 {
4575 asection *s;
4576
4577 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4578 r_symndx);
4579 if (s == NULL)
4580 return FALSE;
4581 else if (s != sec)
4582 opd_sym_map[rel->r_offset / 8] = s;
4583 }
4584 }
4585 /* Fall through. */
4586
4587 case R_PPC64_REL30:
4588 case R_PPC64_REL32:
4589 case R_PPC64_REL64:
4590 case R_PPC64_ADDR14:
4591 case R_PPC64_ADDR14_BRNTAKEN:
4592 case R_PPC64_ADDR14_BRTAKEN:
4593 case R_PPC64_ADDR16:
4594 case R_PPC64_ADDR16_DS:
4595 case R_PPC64_ADDR16_HA:
4596 case R_PPC64_ADDR16_HI:
4597 case R_PPC64_ADDR16_HIGHER:
4598 case R_PPC64_ADDR16_HIGHERA:
4599 case R_PPC64_ADDR16_HIGHEST:
4600 case R_PPC64_ADDR16_HIGHESTA:
4601 case R_PPC64_ADDR16_LO:
4602 case R_PPC64_ADDR16_LO_DS:
4603 case R_PPC64_ADDR24:
4604 case R_PPC64_ADDR32:
4605 case R_PPC64_UADDR16:
4606 case R_PPC64_UADDR32:
4607 case R_PPC64_UADDR64:
4608 case R_PPC64_TOC:
4609 if (h != NULL && !info->shared)
4610 /* We may need a copy reloc. */
4611 h->non_got_ref = 1;
4612
4613 /* Don't propagate .opd relocs. */
4614 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4615 break;
4616
4617 /* If we are creating a shared library, and this is a reloc
4618 against a global symbol, or a non PC relative reloc
4619 against a local symbol, then we need to copy the reloc
4620 into the shared library. However, if we are linking with
4621 -Bsymbolic, we do not need to copy a reloc against a
4622 global symbol which is defined in an object we are
4623 including in the link (i.e., DEF_REGULAR is set). At
4624 this point we have not seen all the input files, so it is
4625 possible that DEF_REGULAR is not set now but will be set
4626 later (it is never cleared). In case of a weak definition,
4627 DEF_REGULAR may be cleared later by a strong definition in
4628 a shared library. We account for that possibility below by
4629 storing information in the dyn_relocs field of the hash
4630 table entry. A similar situation occurs when creating
4631 shared libraries and symbol visibility changes render the
4632 symbol local.
4633
4634 If on the other hand, we are creating an executable, we
4635 may need to keep relocations for symbols satisfied by a
4636 dynamic library if we manage to avoid copy relocs for the
4637 symbol. */
4638 dodyn:
4639 if ((info->shared
4640 && (MUST_BE_DYN_RELOC (r_type)
4641 || (h != NULL
4642 && (! info->symbolic
4643 || h->root.type == bfd_link_hash_defweak
4644 || !h->def_regular))))
4645 || (ELIMINATE_COPY_RELOCS
4646 && !info->shared
4647 && h != NULL
4648 && (h->root.type == bfd_link_hash_defweak
4649 || !h->def_regular)))
4650 {
4651 struct ppc_dyn_relocs *p;
4652 struct ppc_dyn_relocs **head;
4653
4654 /* We must copy these reloc types into the output file.
4655 Create a reloc section in dynobj and make room for
4656 this reloc. */
4657 if (sreloc == NULL)
4658 {
4659 const char *name;
4660 bfd *dynobj;
4661
4662 name = (bfd_elf_string_from_elf_section
4663 (abfd,
4664 elf_elfheader (abfd)->e_shstrndx,
4665 elf_section_data (sec)->rel_hdr.sh_name));
4666 if (name == NULL)
4667 return FALSE;
4668
4669 if (strncmp (name, ".rela", 5) != 0
4670 || strcmp (bfd_get_section_name (abfd, sec),
4671 name + 5) != 0)
4672 {
4673 (*_bfd_error_handler)
4674 (_("%B: bad relocation section name `%s\'"),
4675 abfd, name);
4676 bfd_set_error (bfd_error_bad_value);
4677 }
4678
4679 dynobj = htab->elf.dynobj;
4680 sreloc = bfd_get_section_by_name (dynobj, name);
4681 if (sreloc == NULL)
4682 {
4683 flagword flags;
4684
4685 sreloc = bfd_make_section (dynobj, name);
4686 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4687 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4688 if ((sec->flags & SEC_ALLOC) != 0)
4689 flags |= SEC_ALLOC | SEC_LOAD;
4690 if (sreloc == NULL
4691 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4692 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4693 return FALSE;
4694 }
4695 elf_section_data (sec)->sreloc = sreloc;
4696 }
4697
4698 /* If this is a global symbol, we count the number of
4699 relocations we need for this symbol. */
4700 if (h != NULL)
4701 {
4702 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4703 }
4704 else
4705 {
4706 /* Track dynamic relocs needed for local syms too.
4707 We really need local syms available to do this
4708 easily. Oh well. */
4709
4710 asection *s;
4711 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4712 sec, r_symndx);
4713 if (s == NULL)
4714 return FALSE;
4715
4716 head = ((struct ppc_dyn_relocs **)
4717 &elf_section_data (s)->local_dynrel);
4718 }
4719
4720 p = *head;
4721 if (p == NULL || p->sec != sec)
4722 {
4723 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4724 if (p == NULL)
4725 return FALSE;
4726 p->next = *head;
4727 *head = p;
4728 p->sec = sec;
4729 p->count = 0;
4730 p->pc_count = 0;
4731 }
4732
4733 p->count += 1;
4734 if (!MUST_BE_DYN_RELOC (r_type))
4735 p->pc_count += 1;
4736 }
4737 break;
4738
4739 default:
4740 break;
4741 }
4742 }
4743
4744 return TRUE;
4745 }
4746
4747 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4748 of the code entry point, and its section. */
4749
4750 static bfd_vma
4751 opd_entry_value (asection *opd_sec,
4752 bfd_vma offset,
4753 asection **code_sec,
4754 bfd_vma *code_off)
4755 {
4756 bfd *opd_bfd = opd_sec->owner;
4757 Elf_Internal_Rela *relocs;
4758 Elf_Internal_Rela *lo, *hi, *look;
4759 bfd_vma val;
4760
4761 /* No relocs implies we are linking a --just-symbols object. */
4762 if (opd_sec->reloc_count == 0)
4763 {
4764 bfd_vma val;
4765
4766 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4767 return (bfd_vma) -1;
4768
4769 if (code_sec != NULL)
4770 {
4771 asection *sec, *likely = NULL;
4772 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4773 if (sec->vma <= val
4774 && (sec->flags & SEC_LOAD) != 0
4775 && (sec->flags & SEC_ALLOC) != 0)
4776 likely = sec;
4777 if (likely != NULL)
4778 {
4779 *code_sec = likely;
4780 if (code_off != NULL)
4781 *code_off = val - likely->vma;
4782 }
4783 }
4784 return val;
4785 }
4786
4787 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4788 if (relocs == NULL)
4789 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4790
4791 /* Go find the opd reloc at the sym address. */
4792 lo = relocs;
4793 BFD_ASSERT (lo != NULL);
4794 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4795 val = (bfd_vma) -1;
4796 while (lo < hi)
4797 {
4798 look = lo + (hi - lo) / 2;
4799 if (look->r_offset < offset)
4800 lo = look + 1;
4801 else if (look->r_offset > offset)
4802 hi = look;
4803 else
4804 {
4805 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4806 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4807 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4808 {
4809 unsigned long symndx = ELF64_R_SYM (look->r_info);
4810 asection *sec;
4811
4812 if (symndx < symtab_hdr->sh_info)
4813 {
4814 Elf_Internal_Sym *sym;
4815
4816 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4817 if (sym == NULL)
4818 {
4819 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4820 symtab_hdr->sh_info,
4821 0, NULL, NULL, NULL);
4822 if (sym == NULL)
4823 break;
4824 symtab_hdr->contents = (bfd_byte *) sym;
4825 }
4826
4827 sym += symndx;
4828 val = sym->st_value;
4829 sec = NULL;
4830 if ((sym->st_shndx != SHN_UNDEF
4831 && sym->st_shndx < SHN_LORESERVE)
4832 || sym->st_shndx > SHN_HIRESERVE)
4833 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4834 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4835 }
4836 else
4837 {
4838 struct elf_link_hash_entry **sym_hashes;
4839 struct elf_link_hash_entry *rh;
4840
4841 sym_hashes = elf_sym_hashes (opd_bfd);
4842 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4843 while (rh->root.type == bfd_link_hash_indirect
4844 || rh->root.type == bfd_link_hash_warning)
4845 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4846 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4847 || rh->root.type == bfd_link_hash_defweak);
4848 val = rh->root.u.def.value;
4849 sec = rh->root.u.def.section;
4850 }
4851 val += look->r_addend;
4852 if (code_off != NULL)
4853 *code_off = val;
4854 if (code_sec != NULL)
4855 *code_sec = sec;
4856 if (sec != NULL && sec->output_section != NULL)
4857 val += sec->output_section->vma + sec->output_offset;
4858 }
4859 break;
4860 }
4861 }
4862
4863 return val;
4864 }
4865
4866 /* Return the section that should be marked against GC for a given
4867 relocation. */
4868
4869 static asection *
4870 ppc64_elf_gc_mark_hook (asection *sec,
4871 struct bfd_link_info *info,
4872 Elf_Internal_Rela *rel,
4873 struct elf_link_hash_entry *h,
4874 Elf_Internal_Sym *sym)
4875 {
4876 asection *rsec;
4877
4878 /* First mark all our entry sym sections. */
4879 if (info->gc_sym_list != NULL)
4880 {
4881 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4882 struct bfd_sym_chain *sym = info->gc_sym_list;
4883
4884 info->gc_sym_list = NULL;
4885 do
4886 {
4887 struct ppc_link_hash_entry *eh;
4888
4889 eh = (struct ppc_link_hash_entry *)
4890 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4891 if (eh == NULL)
4892 continue;
4893 if (eh->elf.root.type != bfd_link_hash_defined
4894 && eh->elf.root.type != bfd_link_hash_defweak)
4895 continue;
4896
4897 if (eh->is_func_descriptor
4898 && (eh->oh->elf.root.type == bfd_link_hash_defined
4899 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4900 rsec = eh->oh->elf.root.u.def.section;
4901 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4902 && opd_entry_value (eh->elf.root.u.def.section,
4903 eh->elf.root.u.def.value,
4904 &rsec, NULL) != (bfd_vma) -1)
4905 ;
4906 else
4907 continue;
4908
4909 if (!rsec->gc_mark)
4910 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4911
4912 rsec = eh->elf.root.u.def.section;
4913 if (!rsec->gc_mark)
4914 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4915
4916 sym = sym->next;
4917 }
4918 while (sym != NULL);
4919 }
4920
4921 /* Syms return NULL if we're marking .opd, so we avoid marking all
4922 function sections, as all functions are referenced in .opd. */
4923 rsec = NULL;
4924 if (get_opd_info (sec) != NULL)
4925 return rsec;
4926
4927 if (h != NULL)
4928 {
4929 enum elf_ppc64_reloc_type r_type;
4930 struct ppc_link_hash_entry *eh;
4931
4932 r_type = ELF64_R_TYPE (rel->r_info);
4933 switch (r_type)
4934 {
4935 case R_PPC64_GNU_VTINHERIT:
4936 case R_PPC64_GNU_VTENTRY:
4937 break;
4938
4939 default:
4940 switch (h->root.type)
4941 {
4942 case bfd_link_hash_defined:
4943 case bfd_link_hash_defweak:
4944 eh = (struct ppc_link_hash_entry *) h;
4945 if (eh->oh != NULL
4946 && eh->oh->is_func_descriptor
4947 && (eh->oh->elf.root.type == bfd_link_hash_defined
4948 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4949 eh = eh->oh;
4950
4951 /* Function descriptor syms cause the associated
4952 function code sym section to be marked. */
4953 if (eh->is_func_descriptor
4954 && (eh->oh->elf.root.type == bfd_link_hash_defined
4955 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4956 {
4957 /* They also mark their opd section. */
4958 if (!eh->elf.root.u.def.section->gc_mark)
4959 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4960 ppc64_elf_gc_mark_hook);
4961
4962 rsec = eh->oh->elf.root.u.def.section;
4963 }
4964 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4965 && opd_entry_value (eh->elf.root.u.def.section,
4966 eh->elf.root.u.def.value,
4967 &rsec, NULL) != (bfd_vma) -1)
4968 {
4969 if (!eh->elf.root.u.def.section->gc_mark)
4970 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4971 ppc64_elf_gc_mark_hook);
4972 }
4973 else
4974 rsec = h->root.u.def.section;
4975 break;
4976
4977 case bfd_link_hash_common:
4978 rsec = h->root.u.c.p->section;
4979 break;
4980
4981 default:
4982 break;
4983 }
4984 }
4985 }
4986 else
4987 {
4988 asection **opd_sym_section;
4989
4990 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4991 opd_sym_section = get_opd_info (rsec);
4992 if (opd_sym_section != NULL)
4993 {
4994 if (!rsec->gc_mark)
4995 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4996
4997 rsec = opd_sym_section[sym->st_value / 8];
4998 }
4999 }
5000
5001 return rsec;
5002 }
5003
5004 /* Update the .got, .plt. and dynamic reloc reference counts for the
5005 section being removed. */
5006
5007 static bfd_boolean
5008 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5009 asection *sec, const Elf_Internal_Rela *relocs)
5010 {
5011 struct ppc_link_hash_table *htab;
5012 Elf_Internal_Shdr *symtab_hdr;
5013 struct elf_link_hash_entry **sym_hashes;
5014 struct got_entry **local_got_ents;
5015 const Elf_Internal_Rela *rel, *relend;
5016
5017 if ((sec->flags & SEC_ALLOC) == 0)
5018 return TRUE;
5019
5020 elf_section_data (sec)->local_dynrel = NULL;
5021
5022 htab = ppc_hash_table (info);
5023 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5024 sym_hashes = elf_sym_hashes (abfd);
5025 local_got_ents = elf_local_got_ents (abfd);
5026
5027 relend = relocs + sec->reloc_count;
5028 for (rel = relocs; rel < relend; rel++)
5029 {
5030 unsigned long r_symndx;
5031 enum elf_ppc64_reloc_type r_type;
5032 struct elf_link_hash_entry *h = NULL;
5033 char tls_type = 0;
5034
5035 r_symndx = ELF64_R_SYM (rel->r_info);
5036 r_type = ELF64_R_TYPE (rel->r_info);
5037 if (r_symndx >= symtab_hdr->sh_info)
5038 {
5039 struct ppc_link_hash_entry *eh;
5040 struct ppc_dyn_relocs **pp;
5041 struct ppc_dyn_relocs *p;
5042
5043 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5044 while (h->root.type == bfd_link_hash_indirect
5045 || h->root.type == bfd_link_hash_warning)
5046 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5047 eh = (struct ppc_link_hash_entry *) h;
5048
5049 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5050 if (p->sec == sec)
5051 {
5052 /* Everything must go for SEC. */
5053 *pp = p->next;
5054 break;
5055 }
5056 }
5057
5058 switch (r_type)
5059 {
5060 case R_PPC64_GOT_TLSLD16:
5061 case R_PPC64_GOT_TLSLD16_LO:
5062 case R_PPC64_GOT_TLSLD16_HI:
5063 case R_PPC64_GOT_TLSLD16_HA:
5064 ppc64_tlsld_got (abfd)->refcount -= 1;
5065 tls_type = TLS_TLS | TLS_LD;
5066 goto dogot;
5067
5068 case R_PPC64_GOT_TLSGD16:
5069 case R_PPC64_GOT_TLSGD16_LO:
5070 case R_PPC64_GOT_TLSGD16_HI:
5071 case R_PPC64_GOT_TLSGD16_HA:
5072 tls_type = TLS_TLS | TLS_GD;
5073 goto dogot;
5074
5075 case R_PPC64_GOT_TPREL16_DS:
5076 case R_PPC64_GOT_TPREL16_LO_DS:
5077 case R_PPC64_GOT_TPREL16_HI:
5078 case R_PPC64_GOT_TPREL16_HA:
5079 tls_type = TLS_TLS | TLS_TPREL;
5080 goto dogot;
5081
5082 case R_PPC64_GOT_DTPREL16_DS:
5083 case R_PPC64_GOT_DTPREL16_LO_DS:
5084 case R_PPC64_GOT_DTPREL16_HI:
5085 case R_PPC64_GOT_DTPREL16_HA:
5086 tls_type = TLS_TLS | TLS_DTPREL;
5087 goto dogot;
5088
5089 case R_PPC64_GOT16:
5090 case R_PPC64_GOT16_DS:
5091 case R_PPC64_GOT16_HA:
5092 case R_PPC64_GOT16_HI:
5093 case R_PPC64_GOT16_LO:
5094 case R_PPC64_GOT16_LO_DS:
5095 dogot:
5096 {
5097 struct got_entry *ent;
5098
5099 if (h != NULL)
5100 ent = h->got.glist;
5101 else
5102 ent = local_got_ents[r_symndx];
5103
5104 for (; ent != NULL; ent = ent->next)
5105 if (ent->addend == rel->r_addend
5106 && ent->owner == abfd
5107 && ent->tls_type == tls_type)
5108 break;
5109 if (ent == NULL)
5110 abort ();
5111 if (ent->got.refcount > 0)
5112 ent->got.refcount -= 1;
5113 }
5114 break;
5115
5116 case R_PPC64_PLT16_HA:
5117 case R_PPC64_PLT16_HI:
5118 case R_PPC64_PLT16_LO:
5119 case R_PPC64_PLT32:
5120 case R_PPC64_PLT64:
5121 case R_PPC64_REL14:
5122 case R_PPC64_REL14_BRNTAKEN:
5123 case R_PPC64_REL14_BRTAKEN:
5124 case R_PPC64_REL24:
5125 if (h != NULL)
5126 {
5127 struct plt_entry *ent;
5128
5129 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5130 if (ent->addend == rel->r_addend)
5131 break;
5132 if (ent == NULL)
5133 abort ();
5134 if (ent->plt.refcount > 0)
5135 ent->plt.refcount -= 1;
5136 }
5137 break;
5138
5139 default:
5140 break;
5141 }
5142 }
5143 return TRUE;
5144 }
5145
5146 /* The maximum size of .sfpr. */
5147 #define SFPR_MAX (218*4)
5148
5149 struct sfpr_def_parms
5150 {
5151 const char name[12];
5152 unsigned char lo, hi;
5153 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5154 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5155 };
5156
5157 /* Auto-generate _save*, _rest* functions in .sfpr. */
5158
5159 static unsigned int
5160 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5161 {
5162 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5163 unsigned int i;
5164 size_t len = strlen (parm->name);
5165 bfd_boolean writing = FALSE;
5166 char sym[16];
5167
5168 memcpy (sym, parm->name, len);
5169 sym[len + 2] = 0;
5170
5171 for (i = parm->lo; i <= parm->hi; i++)
5172 {
5173 struct elf_link_hash_entry *h;
5174
5175 sym[len + 0] = i / 10 + '0';
5176 sym[len + 1] = i % 10 + '0';
5177 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5178 if (h != NULL
5179 && !h->def_regular)
5180 {
5181 h->root.type = bfd_link_hash_defined;
5182 h->root.u.def.section = htab->sfpr;
5183 h->root.u.def.value = htab->sfpr->size;
5184 h->type = STT_FUNC;
5185 h->def_regular = 1;
5186 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5187 writing = TRUE;
5188 if (htab->sfpr->contents == NULL)
5189 {
5190 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5191 if (htab->sfpr->contents == NULL)
5192 return FALSE;
5193 }
5194 }
5195 if (writing)
5196 {
5197 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5198 if (i != parm->hi)
5199 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5200 else
5201 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5202 htab->sfpr->size = p - htab->sfpr->contents;
5203 }
5204 }
5205
5206 return TRUE;
5207 }
5208
5209 static bfd_byte *
5210 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5211 {
5212 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5213 return p + 4;
5214 }
5215
5216 static bfd_byte *
5217 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5218 {
5219 p = savegpr0 (abfd, p, r);
5220 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5221 p = p + 4;
5222 bfd_put_32 (abfd, BLR, p);
5223 return p + 4;
5224 }
5225
5226 static bfd_byte *
5227 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5228 {
5229 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5230 return p + 4;
5231 }
5232
5233 static bfd_byte *
5234 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5235 {
5236 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5237 p = p + 4;
5238 p = restgpr0 (abfd, p, r);
5239 bfd_put_32 (abfd, MTLR_R0, p);
5240 p = p + 4;
5241 if (r == 29)
5242 {
5243 p = restgpr0 (abfd, p, 30);
5244 p = restgpr0 (abfd, p, 31);
5245 }
5246 bfd_put_32 (abfd, BLR, p);
5247 return p + 4;
5248 }
5249
5250 static bfd_byte *
5251 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5252 {
5253 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5254 return p + 4;
5255 }
5256
5257 static bfd_byte *
5258 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5259 {
5260 p = savegpr1 (abfd, p, r);
5261 bfd_put_32 (abfd, BLR, p);
5262 return p + 4;
5263 }
5264
5265 static bfd_byte *
5266 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5267 {
5268 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5269 return p + 4;
5270 }
5271
5272 static bfd_byte *
5273 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5274 {
5275 p = restgpr1 (abfd, p, r);
5276 bfd_put_32 (abfd, BLR, p);
5277 return p + 4;
5278 }
5279
5280 static bfd_byte *
5281 savefpr (bfd *abfd, bfd_byte *p, int r)
5282 {
5283 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5284 return p + 4;
5285 }
5286
5287 static bfd_byte *
5288 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5289 {
5290 p = savefpr (abfd, p, r);
5291 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5292 p = p + 4;
5293 bfd_put_32 (abfd, BLR, p);
5294 return p + 4;
5295 }
5296
5297 static bfd_byte *
5298 restfpr (bfd *abfd, bfd_byte *p, int r)
5299 {
5300 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5301 return p + 4;
5302 }
5303
5304 static bfd_byte *
5305 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5306 {
5307 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5308 p = p + 4;
5309 p = restfpr (abfd, p, r);
5310 bfd_put_32 (abfd, MTLR_R0, p);
5311 p = p + 4;
5312 if (r == 29)
5313 {
5314 p = restfpr (abfd, p, 30);
5315 p = restfpr (abfd, p, 31);
5316 }
5317 bfd_put_32 (abfd, BLR, p);
5318 return p + 4;
5319 }
5320
5321 static bfd_byte *
5322 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5323 {
5324 p = savefpr (abfd, p, r);
5325 bfd_put_32 (abfd, BLR, p);
5326 return p + 4;
5327 }
5328
5329 static bfd_byte *
5330 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5331 {
5332 p = restfpr (abfd, p, r);
5333 bfd_put_32 (abfd, BLR, p);
5334 return p + 4;
5335 }
5336
5337 static bfd_byte *
5338 savevr (bfd *abfd, bfd_byte *p, int r)
5339 {
5340 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5341 p = p + 4;
5342 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5343 return p + 4;
5344 }
5345
5346 static bfd_byte *
5347 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5348 {
5349 p = savevr (abfd, p, r);
5350 bfd_put_32 (abfd, BLR, p);
5351 return p + 4;
5352 }
5353
5354 static bfd_byte *
5355 restvr (bfd *abfd, bfd_byte *p, int r)
5356 {
5357 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5358 p = p + 4;
5359 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5360 return p + 4;
5361 }
5362
5363 static bfd_byte *
5364 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5365 {
5366 p = restvr (abfd, p, r);
5367 bfd_put_32 (abfd, BLR, p);
5368 return p + 4;
5369 }
5370
5371 /* Called via elf_link_hash_traverse to transfer dynamic linking
5372 information on function code symbol entries to their corresponding
5373 function descriptor symbol entries. */
5374
5375 static bfd_boolean
5376 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5377 {
5378 struct bfd_link_info *info;
5379 struct ppc_link_hash_table *htab;
5380 struct plt_entry *ent;
5381 struct ppc_link_hash_entry *fh;
5382 struct ppc_link_hash_entry *fdh;
5383 bfd_boolean force_local;
5384
5385 fh = (struct ppc_link_hash_entry *) h;
5386 if (fh->elf.root.type == bfd_link_hash_indirect)
5387 return TRUE;
5388
5389 if (fh->elf.root.type == bfd_link_hash_warning)
5390 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5391
5392 info = inf;
5393 htab = ppc_hash_table (info);
5394
5395 /* Resolve undefined references to dot-symbols as the value
5396 in the function descriptor, if we have one in a regular object.
5397 This is to satisfy cases like ".quad .foo". Calls to functions
5398 in dynamic objects are handled elsewhere. */
5399 if (fh->elf.root.type == bfd_link_hash_undefweak
5400 && fh->was_undefined
5401 && (fh->oh->elf.root.type == bfd_link_hash_defined
5402 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5403 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5404 && opd_entry_value (fh->oh->elf.root.u.def.section,
5405 fh->oh->elf.root.u.def.value,
5406 &fh->elf.root.u.def.section,
5407 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5408 {
5409 fh->elf.root.type = fh->oh->elf.root.type;
5410 fh->elf.forced_local = 1;
5411 }
5412
5413 /* If this is a function code symbol, transfer dynamic linking
5414 information to the function descriptor symbol. */
5415 if (!fh->is_func)
5416 return TRUE;
5417
5418 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5419 if (ent->plt.refcount > 0)
5420 break;
5421 if (ent == NULL
5422 || fh->elf.root.root.string[0] != '.'
5423 || fh->elf.root.root.string[1] == '\0')
5424 return TRUE;
5425
5426 /* Find the corresponding function descriptor symbol. Create it
5427 as undefined if necessary. */
5428
5429 fdh = get_fdh (fh, htab);
5430 if (fdh != NULL)
5431 while (fdh->elf.root.type == bfd_link_hash_indirect
5432 || fdh->elf.root.type == bfd_link_hash_warning)
5433 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5434
5435 if (fdh == NULL
5436 && info->shared
5437 && (fh->elf.root.type == bfd_link_hash_undefined
5438 || fh->elf.root.type == bfd_link_hash_undefweak))
5439 {
5440 fdh = make_fdh (info, fh);
5441 if (fdh == NULL)
5442 return FALSE;
5443 }
5444
5445 /* Fake function descriptors are made undefweak. If the function
5446 code symbol is strong undefined, make the fake sym the same. */
5447
5448 if (fdh != NULL
5449 && fdh->fake
5450 && fdh->elf.root.type == bfd_link_hash_undefweak
5451 && fh->elf.root.type == bfd_link_hash_undefined)
5452 {
5453 fdh->elf.root.type = bfd_link_hash_undefined;
5454 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5455 }
5456
5457 if (fdh != NULL
5458 && !fdh->elf.forced_local
5459 && (info->shared
5460 || fdh->elf.def_dynamic
5461 || fdh->elf.ref_dynamic
5462 || (fdh->elf.root.type == bfd_link_hash_undefweak
5463 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5464 {
5465 if (fdh->elf.dynindx == -1)
5466 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5467 return FALSE;
5468 fdh->elf.ref_regular |= fh->elf.ref_regular;
5469 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5470 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5471 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5472 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5473 {
5474 move_plt_plist (fh, fdh);
5475 fdh->elf.needs_plt = 1;
5476 }
5477 fdh->is_func_descriptor = 1;
5478 fdh->oh = fh;
5479 fh->oh = fdh;
5480 }
5481
5482 /* Now that the info is on the function descriptor, clear the
5483 function code sym info. Any function code syms for which we
5484 don't have a definition in a regular file, we force local.
5485 This prevents a shared library from exporting syms that have
5486 been imported from another library. Function code syms that
5487 are really in the library we must leave global to prevent the
5488 linker dragging in a definition from a static library. */
5489 force_local
5490 = (info->shared
5491 && (!fh->elf.def_regular
5492 || fdh == NULL
5493 || !fdh->elf.def_regular
5494 || fdh->elf.forced_local));
5495 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5496
5497 return TRUE;
5498 }
5499
5500 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5501 this hook to a) provide some gcc support functions, and b) transfer
5502 dynamic linking information gathered so far on function code symbol
5503 entries, to their corresponding function descriptor symbol entries. */
5504
5505 static bfd_boolean
5506 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5507 struct bfd_link_info *info)
5508 {
5509 struct ppc_link_hash_table *htab;
5510 unsigned int i;
5511 const struct sfpr_def_parms funcs[] =
5512 {
5513 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5514 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5515 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5516 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5517 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5518 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5519 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5520 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5521 { "._savef", 14, 31, savefpr, savefpr1_tail },
5522 { "._restf", 14, 31, restfpr, restfpr1_tail },
5523 { "_savevr_", 20, 31, savevr, savevr_tail },
5524 { "_restvr_", 20, 31, restvr, restvr_tail }
5525 };
5526
5527 htab = ppc_hash_table (info);
5528 if (htab->sfpr == NULL)
5529 /* We don't have any relocs. */
5530 return TRUE;
5531
5532 /* Provide any missing _save* and _rest* functions. */
5533 htab->sfpr->size = 0;
5534 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5535 if (!sfpr_define (info, &funcs[i]))
5536 return FALSE;
5537
5538 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5539
5540 if (htab->sfpr->size == 0)
5541 _bfd_strip_section_from_output (info, htab->sfpr);
5542
5543 return TRUE;
5544 }
5545
5546 /* Adjust a symbol defined by a dynamic object and referenced by a
5547 regular object. The current definition is in some section of the
5548 dynamic object, but we're not including those sections. We have to
5549 change the definition to something the rest of the link can
5550 understand. */
5551
5552 static bfd_boolean
5553 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5554 struct elf_link_hash_entry *h)
5555 {
5556 struct ppc_link_hash_table *htab;
5557 asection *s;
5558 unsigned int power_of_two;
5559
5560 htab = ppc_hash_table (info);
5561
5562 /* Deal with function syms. */
5563 if (h->type == STT_FUNC
5564 || h->needs_plt)
5565 {
5566 /* Clear procedure linkage table information for any symbol that
5567 won't need a .plt entry. */
5568 struct plt_entry *ent;
5569 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5570 if (ent->plt.refcount > 0)
5571 break;
5572 if (ent == NULL
5573 || SYMBOL_CALLS_LOCAL (info, h)
5574 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5575 && h->root.type == bfd_link_hash_undefweak))
5576 {
5577 h->plt.plist = NULL;
5578 h->needs_plt = 0;
5579 }
5580 }
5581 else
5582 h->plt.plist = NULL;
5583
5584 /* If this is a weak symbol, and there is a real definition, the
5585 processor independent code will have arranged for us to see the
5586 real definition first, and we can just use the same value. */
5587 if (h->u.weakdef != NULL)
5588 {
5589 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5590 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5591 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5592 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5593 if (ELIMINATE_COPY_RELOCS)
5594 h->non_got_ref = h->u.weakdef->non_got_ref;
5595 return TRUE;
5596 }
5597
5598 /* If we are creating a shared library, we must presume that the
5599 only references to the symbol are via the global offset table.
5600 For such cases we need not do anything here; the relocations will
5601 be handled correctly by relocate_section. */
5602 if (info->shared)
5603 return TRUE;
5604
5605 /* If there are no references to this symbol that do not use the
5606 GOT, we don't need to generate a copy reloc. */
5607 if (!h->non_got_ref)
5608 return TRUE;
5609
5610 if (ELIMINATE_COPY_RELOCS)
5611 {
5612 struct ppc_link_hash_entry * eh;
5613 struct ppc_dyn_relocs *p;
5614
5615 eh = (struct ppc_link_hash_entry *) h;
5616 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5617 {
5618 s = p->sec->output_section;
5619 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5620 break;
5621 }
5622
5623 /* If we didn't find any dynamic relocs in read-only sections, then
5624 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5625 if (p == NULL)
5626 {
5627 h->non_got_ref = 0;
5628 return TRUE;
5629 }
5630 }
5631
5632 if (h->plt.plist != NULL)
5633 {
5634 /* We should never get here, but unfortunately there are versions
5635 of gcc out there that improperly (for this ABI) put initialized
5636 function pointers, vtable refs and suchlike in read-only
5637 sections. Allow them to proceed, but warn that this might
5638 break at runtime. */
5639 (*_bfd_error_handler)
5640 (_("copy reloc against `%s' requires lazy plt linking; "
5641 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5642 h->root.root.string);
5643 }
5644
5645 /* This is a reference to a symbol defined by a dynamic object which
5646 is not a function. */
5647
5648 /* We must allocate the symbol in our .dynbss section, which will
5649 become part of the .bss section of the executable. There will be
5650 an entry for this symbol in the .dynsym section. The dynamic
5651 object will contain position independent code, so all references
5652 from the dynamic object to this symbol will go through the global
5653 offset table. The dynamic linker will use the .dynsym entry to
5654 determine the address it must put in the global offset table, so
5655 both the dynamic object and the regular object will refer to the
5656 same memory location for the variable. */
5657
5658 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5659 to copy the initial value out of the dynamic object and into the
5660 runtime process image. We need to remember the offset into the
5661 .rela.bss section we are going to use. */
5662 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5663 {
5664 htab->relbss->size += sizeof (Elf64_External_Rela);
5665 h->needs_copy = 1;
5666 }
5667
5668 /* We need to figure out the alignment required for this symbol. I
5669 have no idea how ELF linkers handle this. */
5670 power_of_two = bfd_log2 (h->size);
5671 if (power_of_two > 4)
5672 power_of_two = 4;
5673
5674 /* Apply the required alignment. */
5675 s = htab->dynbss;
5676 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5677 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5678 {
5679 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5680 return FALSE;
5681 }
5682
5683 /* Define the symbol as being at this point in the section. */
5684 h->root.u.def.section = s;
5685 h->root.u.def.value = s->size;
5686
5687 /* Increment the section size to make room for the symbol. */
5688 s->size += h->size;
5689
5690 return TRUE;
5691 }
5692
5693 /* If given a function descriptor symbol, hide both the function code
5694 sym and the descriptor. */
5695 static void
5696 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5697 struct elf_link_hash_entry *h,
5698 bfd_boolean force_local)
5699 {
5700 struct ppc_link_hash_entry *eh;
5701 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5702
5703 eh = (struct ppc_link_hash_entry *) h;
5704 if (eh->is_func_descriptor)
5705 {
5706 struct ppc_link_hash_entry *fh = eh->oh;
5707
5708 if (fh == NULL)
5709 {
5710 const char *p, *q;
5711 struct ppc_link_hash_table *htab;
5712 char save;
5713
5714 /* We aren't supposed to use alloca in BFD because on
5715 systems which do not have alloca the version in libiberty
5716 calls xmalloc, which might cause the program to crash
5717 when it runs out of memory. This function doesn't have a
5718 return status, so there's no way to gracefully return an
5719 error. So cheat. We know that string[-1] can be safely
5720 accessed; It's either a string in an ELF string table,
5721 or allocated in an objalloc structure. */
5722
5723 p = eh->elf.root.root.string - 1;
5724 save = *p;
5725 *(char *) p = '.';
5726 htab = ppc_hash_table (info);
5727 fh = (struct ppc_link_hash_entry *)
5728 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5729 *(char *) p = save;
5730
5731 /* Unfortunately, if it so happens that the string we were
5732 looking for was allocated immediately before this string,
5733 then we overwrote the string terminator. That's the only
5734 reason the lookup should fail. */
5735 if (fh == NULL)
5736 {
5737 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5738 while (q >= eh->elf.root.root.string && *q == *p)
5739 --q, --p;
5740 if (q < eh->elf.root.root.string && *p == '.')
5741 fh = (struct ppc_link_hash_entry *)
5742 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5743 }
5744 if (fh != NULL)
5745 {
5746 eh->oh = fh;
5747 fh->oh = eh;
5748 }
5749 }
5750 if (fh != NULL)
5751 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5752 }
5753 }
5754
5755 static bfd_boolean
5756 get_sym_h (struct elf_link_hash_entry **hp,
5757 Elf_Internal_Sym **symp,
5758 asection **symsecp,
5759 char **tls_maskp,
5760 Elf_Internal_Sym **locsymsp,
5761 unsigned long r_symndx,
5762 bfd *ibfd)
5763 {
5764 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5765
5766 if (r_symndx >= symtab_hdr->sh_info)
5767 {
5768 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5769 struct elf_link_hash_entry *h;
5770
5771 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5772 while (h->root.type == bfd_link_hash_indirect
5773 || h->root.type == bfd_link_hash_warning)
5774 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5775
5776 if (hp != NULL)
5777 *hp = h;
5778
5779 if (symp != NULL)
5780 *symp = NULL;
5781
5782 if (symsecp != NULL)
5783 {
5784 asection *symsec = NULL;
5785 if (h->root.type == bfd_link_hash_defined
5786 || h->root.type == bfd_link_hash_defweak)
5787 symsec = h->root.u.def.section;
5788 *symsecp = symsec;
5789 }
5790
5791 if (tls_maskp != NULL)
5792 {
5793 struct ppc_link_hash_entry *eh;
5794
5795 eh = (struct ppc_link_hash_entry *) h;
5796 *tls_maskp = &eh->tls_mask;
5797 }
5798 }
5799 else
5800 {
5801 Elf_Internal_Sym *sym;
5802 Elf_Internal_Sym *locsyms = *locsymsp;
5803
5804 if (locsyms == NULL)
5805 {
5806 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5807 if (locsyms == NULL)
5808 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5809 symtab_hdr->sh_info,
5810 0, NULL, NULL, NULL);
5811 if (locsyms == NULL)
5812 return FALSE;
5813 *locsymsp = locsyms;
5814 }
5815 sym = locsyms + r_symndx;
5816
5817 if (hp != NULL)
5818 *hp = NULL;
5819
5820 if (symp != NULL)
5821 *symp = sym;
5822
5823 if (symsecp != NULL)
5824 {
5825 asection *symsec = NULL;
5826 if ((sym->st_shndx != SHN_UNDEF
5827 && sym->st_shndx < SHN_LORESERVE)
5828 || sym->st_shndx > SHN_HIRESERVE)
5829 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5830 *symsecp = symsec;
5831 }
5832
5833 if (tls_maskp != NULL)
5834 {
5835 struct got_entry **lgot_ents;
5836 char *tls_mask;
5837
5838 tls_mask = NULL;
5839 lgot_ents = elf_local_got_ents (ibfd);
5840 if (lgot_ents != NULL)
5841 {
5842 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5843 tls_mask = &lgot_masks[r_symndx];
5844 }
5845 *tls_maskp = tls_mask;
5846 }
5847 }
5848 return TRUE;
5849 }
5850
5851 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5852 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5853 type suitable for optimization, and 1 otherwise. */
5854
5855 static int
5856 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5857 Elf_Internal_Sym **locsymsp,
5858 const Elf_Internal_Rela *rel, bfd *ibfd)
5859 {
5860 unsigned long r_symndx;
5861 int next_r;
5862 struct elf_link_hash_entry *h;
5863 Elf_Internal_Sym *sym;
5864 asection *sec;
5865 bfd_vma off;
5866
5867 r_symndx = ELF64_R_SYM (rel->r_info);
5868 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5869 return 0;
5870
5871 if ((*tls_maskp != NULL && **tls_maskp != 0)
5872 || sec == NULL
5873 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5874 return 1;
5875
5876 /* Look inside a TOC section too. */
5877 if (h != NULL)
5878 {
5879 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5880 off = h->root.u.def.value;
5881 }
5882 else
5883 off = sym->st_value;
5884 off += rel->r_addend;
5885 BFD_ASSERT (off % 8 == 0);
5886 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5887 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5888 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5889 return 0;
5890 if (toc_symndx != NULL)
5891 *toc_symndx = r_symndx;
5892 if ((h == NULL
5893 || ((h->root.type == bfd_link_hash_defined
5894 || h->root.type == bfd_link_hash_defweak)
5895 && !h->def_dynamic))
5896 && (next_r == -1 || next_r == -2))
5897 return 1 - next_r;
5898 return 1;
5899 }
5900
5901 /* Adjust all global syms defined in opd sections. In gcc generated
5902 code for the old ABI, these will already have been done. */
5903
5904 static bfd_boolean
5905 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5906 {
5907 struct ppc_link_hash_entry *eh;
5908 asection *sym_sec;
5909 long *opd_adjust;
5910
5911 if (h->root.type == bfd_link_hash_indirect)
5912 return TRUE;
5913
5914 if (h->root.type == bfd_link_hash_warning)
5915 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5916
5917 if (h->root.type != bfd_link_hash_defined
5918 && h->root.type != bfd_link_hash_defweak)
5919 return TRUE;
5920
5921 eh = (struct ppc_link_hash_entry *) h;
5922 if (eh->adjust_done)
5923 return TRUE;
5924
5925 sym_sec = eh->elf.root.u.def.section;
5926 opd_adjust = get_opd_info (sym_sec);
5927 if (opd_adjust != NULL)
5928 {
5929 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5930 if (adjust == -1)
5931 {
5932 /* This entry has been deleted. */
5933 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5934 if (dsec == NULL)
5935 {
5936 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5937 if (elf_discarded_section (dsec))
5938 {
5939 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5940 break;
5941 }
5942 }
5943 eh->elf.root.u.def.value = 0;
5944 eh->elf.root.u.def.section = dsec;
5945 }
5946 else
5947 eh->elf.root.u.def.value += adjust;
5948 eh->adjust_done = 1;
5949 }
5950 return TRUE;
5951 }
5952
5953 /* Remove unused Official Procedure Descriptor entries. Currently we
5954 only remove those associated with functions in discarded link-once
5955 sections, or weakly defined functions that have been overridden. It
5956 would be possible to remove many more entries for statically linked
5957 applications. */
5958
5959 bfd_boolean
5960 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5961 bfd_boolean non_overlapping)
5962 {
5963 bfd *ibfd;
5964 bfd_boolean some_edited = FALSE;
5965 asection *need_pad = NULL;
5966
5967 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5968 {
5969 asection *sec;
5970 Elf_Internal_Rela *relstart, *rel, *relend;
5971 Elf_Internal_Shdr *symtab_hdr;
5972 Elf_Internal_Sym *local_syms;
5973 struct elf_link_hash_entry **sym_hashes;
5974 bfd_vma offset;
5975 bfd_size_type amt;
5976 long *opd_adjust;
5977 bfd_boolean need_edit, add_aux_fields;
5978 bfd_size_type cnt_16b = 0;
5979
5980 sec = bfd_get_section_by_name (ibfd, ".opd");
5981 if (sec == NULL)
5982 continue;
5983
5984 amt = sec->size * sizeof (long) / 8;
5985 opd_adjust = get_opd_info (sec);
5986 if (opd_adjust == NULL)
5987 {
5988 /* check_relocs hasn't been called. Must be a ld -r link
5989 or --just-symbols object. */
5990 opd_adjust = bfd_zalloc (obfd, amt);
5991 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5992 }
5993 memset (opd_adjust, 0, amt);
5994
5995 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
5996 continue;
5997
5998 if (sec->output_section == bfd_abs_section_ptr)
5999 continue;
6000
6001 /* Look through the section relocs. */
6002 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6003 continue;
6004
6005 local_syms = NULL;
6006 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6007 sym_hashes = elf_sym_hashes (ibfd);
6008
6009 /* Read the relocations. */
6010 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6011 info->keep_memory);
6012 if (relstart == NULL)
6013 return FALSE;
6014
6015 /* First run through the relocs to check they are sane, and to
6016 determine whether we need to edit this opd section. */
6017 need_edit = FALSE;
6018 need_pad = sec;
6019 offset = 0;
6020 relend = relstart + sec->reloc_count;
6021 for (rel = relstart; rel < relend; )
6022 {
6023 enum elf_ppc64_reloc_type r_type;
6024 unsigned long r_symndx;
6025 asection *sym_sec;
6026 struct elf_link_hash_entry *h;
6027 Elf_Internal_Sym *sym;
6028
6029 /* .opd contains a regular array of 16 or 24 byte entries. We're
6030 only interested in the reloc pointing to a function entry
6031 point. */
6032 if (rel->r_offset != offset
6033 || rel + 1 >= relend
6034 || (rel + 1)->r_offset != offset + 8)
6035 {
6036 /* If someone messes with .opd alignment then after a
6037 "ld -r" we might have padding in the middle of .opd.
6038 Also, there's nothing to prevent someone putting
6039 something silly in .opd with the assembler. No .opd
6040 optimization for them! */
6041 broken_opd:
6042 (*_bfd_error_handler)
6043 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6044 need_edit = FALSE;
6045 break;
6046 }
6047
6048 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6049 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6050 {
6051 (*_bfd_error_handler)
6052 (_("%B: unexpected reloc type %u in .opd section"),
6053 ibfd, r_type);
6054 need_edit = FALSE;
6055 break;
6056 }
6057
6058 r_symndx = ELF64_R_SYM (rel->r_info);
6059 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6060 r_symndx, ibfd))
6061 goto error_ret;
6062
6063 if (sym_sec == NULL || sym_sec->owner == NULL)
6064 {
6065 const char *sym_name;
6066 if (h != NULL)
6067 sym_name = h->root.root.string;
6068 else
6069 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym);
6070
6071 (*_bfd_error_handler)
6072 (_("%B: undefined sym `%s' in .opd section"),
6073 ibfd, sym_name);
6074 need_edit = FALSE;
6075 break;
6076 }
6077
6078 /* opd entries are always for functions defined in the
6079 current input bfd. If the symbol isn't defined in the
6080 input bfd, then we won't be using the function in this
6081 bfd; It must be defined in a linkonce section in another
6082 bfd, or is weak. It's also possible that we are
6083 discarding the function due to a linker script /DISCARD/,
6084 which we test for via the output_section. */
6085 if (sym_sec->owner != ibfd
6086 || sym_sec->output_section == bfd_abs_section_ptr)
6087 need_edit = TRUE;
6088
6089 rel += 2;
6090 if (rel == relend
6091 || (rel + 1 == relend && rel->r_offset == offset + 16))
6092 {
6093 if (sec->size == offset + 24)
6094 {
6095 need_pad = NULL;
6096 break;
6097 }
6098 if (rel == relend && sec->size == offset + 16)
6099 {
6100 cnt_16b++;
6101 break;
6102 }
6103 goto broken_opd;
6104 }
6105
6106 if (rel->r_offset == offset + 24)
6107 offset += 24;
6108 else if (rel->r_offset != offset + 16)
6109 goto broken_opd;
6110 else if (rel + 1 < relend
6111 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6112 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6113 {
6114 offset += 16;
6115 cnt_16b++;
6116 }
6117 else if (rel + 2 < relend
6118 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6119 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6120 {
6121 offset += 24;
6122 rel += 1;
6123 }
6124 else
6125 goto broken_opd;
6126 }
6127
6128 add_aux_fields = non_overlapping && cnt_16b > 0;
6129
6130 if (need_edit || add_aux_fields)
6131 {
6132 Elf_Internal_Rela *write_rel;
6133 bfd_byte *rptr, *wptr;
6134 bfd_byte *new_contents = NULL;
6135 bfd_boolean skip;
6136 long opd_ent_size;
6137
6138 /* This seems a waste of time as input .opd sections are all
6139 zeros as generated by gcc, but I suppose there's no reason
6140 this will always be so. We might start putting something in
6141 the third word of .opd entries. */
6142 if ((sec->flags & SEC_IN_MEMORY) == 0)
6143 {
6144 bfd_byte *loc;
6145 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6146 {
6147 if (loc != NULL)
6148 free (loc);
6149 error_ret:
6150 if (local_syms != NULL
6151 && symtab_hdr->contents != (unsigned char *) local_syms)
6152 free (local_syms);
6153 if (elf_section_data (sec)->relocs != relstart)
6154 free (relstart);
6155 return FALSE;
6156 }
6157 sec->contents = loc;
6158 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6159 }
6160
6161 elf_section_data (sec)->relocs = relstart;
6162
6163 wptr = sec->contents;
6164 rptr = sec->contents;
6165 new_contents = sec->contents;
6166
6167 if (add_aux_fields)
6168 {
6169 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6170 if (new_contents == NULL)
6171 return FALSE;
6172 need_pad = FALSE;
6173 wptr = new_contents;
6174 }
6175
6176 write_rel = relstart;
6177 skip = FALSE;
6178 offset = 0;
6179 opd_ent_size = 0;
6180 for (rel = relstart; rel < relend; rel++)
6181 {
6182 unsigned long r_symndx;
6183 asection *sym_sec;
6184 struct elf_link_hash_entry *h;
6185 Elf_Internal_Sym *sym;
6186
6187 r_symndx = ELF64_R_SYM (rel->r_info);
6188 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6189 r_symndx, ibfd))
6190 goto error_ret;
6191
6192 if (rel->r_offset == offset)
6193 {
6194 struct ppc_link_hash_entry *fdh = NULL;
6195
6196 /* See if the .opd entry is full 24 byte or
6197 16 byte (with fd_aux entry overlapped with next
6198 fd_func). */
6199 opd_ent_size = 24;
6200 if ((rel + 2 == relend && sec->size == offset + 16)
6201 || (rel + 3 < relend
6202 && rel[2].r_offset == offset + 16
6203 && rel[3].r_offset == offset + 24
6204 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6205 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6206 opd_ent_size = 16;
6207
6208 if (h != NULL
6209 && h->root.root.string[0] == '.')
6210 {
6211 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6212 ppc_hash_table (info));
6213 if (fdh != NULL
6214 && fdh->elf.root.type != bfd_link_hash_defined
6215 && fdh->elf.root.type != bfd_link_hash_defweak)
6216 fdh = NULL;
6217 }
6218
6219 skip = (sym_sec->owner != ibfd
6220 || sym_sec->output_section == bfd_abs_section_ptr);
6221 if (skip)
6222 {
6223 if (fdh != NULL && sym_sec->owner == ibfd)
6224 {
6225 /* Arrange for the function descriptor sym
6226 to be dropped. */
6227 fdh->elf.root.u.def.value = 0;
6228 fdh->elf.root.u.def.section = sym_sec;
6229 }
6230 opd_adjust[rel->r_offset / 8] = -1;
6231 }
6232 else
6233 {
6234 /* We'll be keeping this opd entry. */
6235
6236 if (fdh != NULL)
6237 {
6238 /* Redefine the function descriptor symbol to
6239 this location in the opd section. It is
6240 necessary to update the value here rather
6241 than using an array of adjustments as we do
6242 for local symbols, because various places
6243 in the generic ELF code use the value
6244 stored in u.def.value. */
6245 fdh->elf.root.u.def.value = wptr - new_contents;
6246 fdh->adjust_done = 1;
6247 }
6248
6249 /* Local syms are a bit tricky. We could
6250 tweak them as they can be cached, but
6251 we'd need to look through the local syms
6252 for the function descriptor sym which we
6253 don't have at the moment. So keep an
6254 array of adjustments. */
6255 opd_adjust[rel->r_offset / 8]
6256 = (wptr - new_contents) - (rptr - sec->contents);
6257
6258 if (wptr != rptr)
6259 memcpy (wptr, rptr, opd_ent_size);
6260 wptr += opd_ent_size;
6261 if (add_aux_fields && opd_ent_size == 16)
6262 {
6263 memset (wptr, '\0', 8);
6264 wptr += 8;
6265 }
6266 }
6267 rptr += opd_ent_size;
6268 offset += opd_ent_size;
6269 }
6270
6271 if (skip)
6272 {
6273 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6274 if (info->shared)
6275 {
6276 /* We won't be needing dynamic relocs here. */
6277 struct ppc_dyn_relocs **pp;
6278 struct ppc_dyn_relocs *p;
6279
6280 if (h != NULL)
6281 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6282 else if (sym_sec != NULL)
6283 pp = ((struct ppc_dyn_relocs **)
6284 &elf_section_data (sym_sec)->local_dynrel);
6285 else
6286 pp = ((struct ppc_dyn_relocs **)
6287 &elf_section_data (sec)->local_dynrel);
6288 while ((p = *pp) != NULL)
6289 {
6290 if (p->sec == sec)
6291 {
6292 p->count -= 1;
6293 if (p->count == 0)
6294 *pp = p->next;
6295 break;
6296 }
6297 pp = &p->next;
6298 }
6299 }
6300 }
6301 else
6302 {
6303 /* We need to adjust any reloc offsets to point to the
6304 new opd entries. While we're at it, we may as well
6305 remove redundant relocs. */
6306 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6307 if (write_rel != rel)
6308 memcpy (write_rel, rel, sizeof (*rel));
6309 ++write_rel;
6310 }
6311 }
6312
6313 sec->size = wptr - new_contents;
6314 sec->reloc_count = write_rel - relstart;
6315 if (add_aux_fields)
6316 {
6317 free (sec->contents);
6318 sec->contents = new_contents;
6319 }
6320
6321 /* Fudge the size too, as this is used later in
6322 elf_bfd_final_link if we are emitting relocs. */
6323 elf_section_data (sec)->rel_hdr.sh_size
6324 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6325 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6326 some_edited = TRUE;
6327 }
6328 else if (elf_section_data (sec)->relocs != relstart)
6329 free (relstart);
6330
6331 if (local_syms != NULL
6332 && symtab_hdr->contents != (unsigned char *) local_syms)
6333 {
6334 if (!info->keep_memory)
6335 free (local_syms);
6336 else
6337 symtab_hdr->contents = (unsigned char *) local_syms;
6338 }
6339 }
6340
6341 if (some_edited)
6342 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6343
6344 /* If we are doing a final link and the last .opd entry is just 16 byte
6345 long, add a 8 byte padding after it. */
6346 if (need_pad != NULL && !info->relocatable)
6347 {
6348 bfd_byte *p;
6349
6350 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6351 {
6352 BFD_ASSERT (need_pad->size > 0);
6353
6354 p = bfd_malloc (need_pad->size + 8);
6355 if (p == NULL)
6356 return FALSE;
6357
6358 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6359 p, 0, need_pad->size))
6360 return FALSE;
6361
6362 need_pad->contents = p;
6363 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6364 }
6365 else
6366 {
6367 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6368 if (p == NULL)
6369 return FALSE;
6370
6371 need_pad->contents = p;
6372 }
6373
6374 memset (need_pad->contents + need_pad->size, 0, 8);
6375 need_pad->size += 8;
6376 }
6377
6378 return TRUE;
6379 }
6380
6381 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6382
6383 asection *
6384 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6385 {
6386 struct ppc_link_hash_table *htab;
6387
6388 htab = ppc_hash_table (info);
6389 if (htab->tls_get_addr != NULL)
6390 {
6391 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6392
6393 while (h->elf.root.type == bfd_link_hash_indirect
6394 || h->elf.root.type == bfd_link_hash_warning)
6395 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6396
6397 htab->tls_get_addr = h;
6398
6399 if (htab->tls_get_addr_fd == NULL
6400 && h->oh != NULL
6401 && h->oh->is_func_descriptor
6402 && (h->oh->elf.root.type == bfd_link_hash_defined
6403 || h->oh->elf.root.type == bfd_link_hash_defweak))
6404 htab->tls_get_addr_fd = h->oh;
6405 }
6406
6407 if (htab->tls_get_addr_fd != NULL)
6408 {
6409 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6410
6411 while (h->elf.root.type == bfd_link_hash_indirect
6412 || h->elf.root.type == bfd_link_hash_warning)
6413 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6414
6415 htab->tls_get_addr_fd = h;
6416 }
6417
6418 return _bfd_elf_tls_setup (obfd, info);
6419 }
6420
6421 /* Run through all the TLS relocs looking for optimization
6422 opportunities. The linker has been hacked (see ppc64elf.em) to do
6423 a preliminary section layout so that we know the TLS segment
6424 offsets. We can't optimize earlier because some optimizations need
6425 to know the tp offset, and we need to optimize before allocating
6426 dynamic relocations. */
6427
6428 bfd_boolean
6429 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6430 {
6431 bfd *ibfd;
6432 asection *sec;
6433 struct ppc_link_hash_table *htab;
6434
6435 if (info->relocatable || info->shared)
6436 return TRUE;
6437
6438 htab = ppc_hash_table (info);
6439 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6440 {
6441 Elf_Internal_Sym *locsyms = NULL;
6442
6443 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6444 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6445 {
6446 Elf_Internal_Rela *relstart, *rel, *relend;
6447 int expecting_tls_get_addr;
6448
6449 /* Read the relocations. */
6450 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6451 info->keep_memory);
6452 if (relstart == NULL)
6453 return FALSE;
6454
6455 expecting_tls_get_addr = 0;
6456 relend = relstart + sec->reloc_count;
6457 for (rel = relstart; rel < relend; rel++)
6458 {
6459 enum elf_ppc64_reloc_type r_type;
6460 unsigned long r_symndx;
6461 struct elf_link_hash_entry *h;
6462 Elf_Internal_Sym *sym;
6463 asection *sym_sec;
6464 char *tls_mask;
6465 char tls_set, tls_clear, tls_type = 0;
6466 bfd_vma value;
6467 bfd_boolean ok_tprel, is_local;
6468
6469 r_symndx = ELF64_R_SYM (rel->r_info);
6470 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6471 r_symndx, ibfd))
6472 {
6473 err_free_rel:
6474 if (elf_section_data (sec)->relocs != relstart)
6475 free (relstart);
6476 if (locsyms != NULL
6477 && (elf_tdata (ibfd)->symtab_hdr.contents
6478 != (unsigned char *) locsyms))
6479 free (locsyms);
6480 return FALSE;
6481 }
6482
6483 if (h != NULL)
6484 {
6485 if (h->root.type != bfd_link_hash_defined
6486 && h->root.type != bfd_link_hash_defweak)
6487 continue;
6488 value = h->root.u.def.value;
6489 }
6490 else
6491 /* Symbols referenced by TLS relocs must be of type
6492 STT_TLS. So no need for .opd local sym adjust. */
6493 value = sym->st_value;
6494
6495 ok_tprel = FALSE;
6496 is_local = FALSE;
6497 if (h == NULL
6498 || !h->def_dynamic)
6499 {
6500 is_local = TRUE;
6501 value += sym_sec->output_offset;
6502 value += sym_sec->output_section->vma;
6503 value -= htab->elf.tls_sec->vma;
6504 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6505 < (bfd_vma) 1 << 32);
6506 }
6507
6508 r_type = ELF64_R_TYPE (rel->r_info);
6509 switch (r_type)
6510 {
6511 case R_PPC64_GOT_TLSLD16:
6512 case R_PPC64_GOT_TLSLD16_LO:
6513 case R_PPC64_GOT_TLSLD16_HI:
6514 case R_PPC64_GOT_TLSLD16_HA:
6515 /* These relocs should never be against a symbol
6516 defined in a shared lib. Leave them alone if
6517 that turns out to be the case. */
6518 ppc64_tlsld_got (ibfd)->refcount -= 1;
6519 if (!is_local)
6520 continue;
6521
6522 /* LD -> LE */
6523 tls_set = 0;
6524 tls_clear = TLS_LD;
6525 tls_type = TLS_TLS | TLS_LD;
6526 expecting_tls_get_addr = 1;
6527 break;
6528
6529 case R_PPC64_GOT_TLSGD16:
6530 case R_PPC64_GOT_TLSGD16_LO:
6531 case R_PPC64_GOT_TLSGD16_HI:
6532 case R_PPC64_GOT_TLSGD16_HA:
6533 if (ok_tprel)
6534 /* GD -> LE */
6535 tls_set = 0;
6536 else
6537 /* GD -> IE */
6538 tls_set = TLS_TLS | TLS_TPRELGD;
6539 tls_clear = TLS_GD;
6540 tls_type = TLS_TLS | TLS_GD;
6541 expecting_tls_get_addr = 1;
6542 break;
6543
6544 case R_PPC64_GOT_TPREL16_DS:
6545 case R_PPC64_GOT_TPREL16_LO_DS:
6546 case R_PPC64_GOT_TPREL16_HI:
6547 case R_PPC64_GOT_TPREL16_HA:
6548 expecting_tls_get_addr = 0;
6549 if (ok_tprel)
6550 {
6551 /* IE -> LE */
6552 tls_set = 0;
6553 tls_clear = TLS_TPREL;
6554 tls_type = TLS_TLS | TLS_TPREL;
6555 break;
6556 }
6557 else
6558 continue;
6559
6560 case R_PPC64_REL14:
6561 case R_PPC64_REL14_BRTAKEN:
6562 case R_PPC64_REL14_BRNTAKEN:
6563 case R_PPC64_REL24:
6564 if (h != NULL
6565 && (h == &htab->tls_get_addr->elf
6566 || h == &htab->tls_get_addr_fd->elf))
6567 {
6568 if (!expecting_tls_get_addr
6569 && rel != relstart
6570 && ((ELF64_R_TYPE (rel[-1].r_info)
6571 == R_PPC64_TOC16)
6572 || (ELF64_R_TYPE (rel[-1].r_info)
6573 == R_PPC64_TOC16_LO)))
6574 {
6575 /* Check for toc tls entries. */
6576 char *toc_tls;
6577 int retval;
6578
6579 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6580 rel - 1, ibfd);
6581 if (retval == 0)
6582 goto err_free_rel;
6583 if (toc_tls != NULL)
6584 expecting_tls_get_addr = retval > 1;
6585 }
6586
6587 if (expecting_tls_get_addr)
6588 {
6589 struct plt_entry *ent;
6590 for (ent = h->plt.plist; ent; ent = ent->next)
6591 if (ent->addend == 0)
6592 {
6593 if (ent->plt.refcount > 0)
6594 ent->plt.refcount -= 1;
6595 break;
6596 }
6597 }
6598 }
6599 expecting_tls_get_addr = 0;
6600 continue;
6601
6602 case R_PPC64_TPREL64:
6603 expecting_tls_get_addr = 0;
6604 if (ok_tprel)
6605 {
6606 /* IE -> LE */
6607 tls_set = TLS_EXPLICIT;
6608 tls_clear = TLS_TPREL;
6609 break;
6610 }
6611 else
6612 continue;
6613
6614 case R_PPC64_DTPMOD64:
6615 expecting_tls_get_addr = 0;
6616 if (rel + 1 < relend
6617 && (rel[1].r_info
6618 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6619 && rel[1].r_offset == rel->r_offset + 8)
6620 {
6621 if (ok_tprel)
6622 /* GD -> LE */
6623 tls_set = TLS_EXPLICIT | TLS_GD;
6624 else
6625 /* GD -> IE */
6626 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6627 tls_clear = TLS_GD;
6628 }
6629 else
6630 {
6631 if (!is_local)
6632 continue;
6633
6634 /* LD -> LE */
6635 tls_set = TLS_EXPLICIT;
6636 tls_clear = TLS_LD;
6637 }
6638 break;
6639
6640 default:
6641 expecting_tls_get_addr = 0;
6642 continue;
6643 }
6644
6645 if ((tls_set & TLS_EXPLICIT) == 0)
6646 {
6647 struct got_entry *ent;
6648
6649 /* Adjust got entry for this reloc. */
6650 if (h != NULL)
6651 ent = h->got.glist;
6652 else
6653 ent = elf_local_got_ents (ibfd)[r_symndx];
6654
6655 for (; ent != NULL; ent = ent->next)
6656 if (ent->addend == rel->r_addend
6657 && ent->owner == ibfd
6658 && ent->tls_type == tls_type)
6659 break;
6660 if (ent == NULL)
6661 abort ();
6662
6663 if (tls_set == 0)
6664 {
6665 /* We managed to get rid of a got entry. */
6666 if (ent->got.refcount > 0)
6667 ent->got.refcount -= 1;
6668 }
6669 }
6670 else if (h != NULL)
6671 {
6672 struct ppc_link_hash_entry * eh;
6673 struct ppc_dyn_relocs **pp;
6674 struct ppc_dyn_relocs *p;
6675
6676 /* Adjust dynamic relocs. */
6677 eh = (struct ppc_link_hash_entry *) h;
6678 for (pp = &eh->dyn_relocs;
6679 (p = *pp) != NULL;
6680 pp = &p->next)
6681 if (p->sec == sec)
6682 {
6683 /* If we got rid of a DTPMOD/DTPREL reloc
6684 pair then we'll lose one or two dyn
6685 relocs. */
6686 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6687 p->count -= 1;
6688 p->count -= 1;
6689 if (p->count == 0)
6690 *pp = p->next;
6691 break;
6692 }
6693 }
6694
6695 *tls_mask |= tls_set;
6696 *tls_mask &= ~tls_clear;
6697 }
6698
6699 if (elf_section_data (sec)->relocs != relstart)
6700 free (relstart);
6701 }
6702
6703 if (locsyms != NULL
6704 && (elf_tdata (ibfd)->symtab_hdr.contents
6705 != (unsigned char *) locsyms))
6706 {
6707 if (!info->keep_memory)
6708 free (locsyms);
6709 else
6710 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6711 }
6712 }
6713 return TRUE;
6714 }
6715
6716 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6717 the values of any global symbols in a toc section that has been
6718 edited. Globals in toc sections should be a rarity, so this function
6719 sets a flag if any are found in toc sections other than the one just
6720 edited, so that futher hash table traversals can be avoided. */
6721
6722 struct adjust_toc_info
6723 {
6724 asection *toc;
6725 unsigned long *skip;
6726 bfd_boolean global_toc_syms;
6727 };
6728
6729 static bfd_boolean
6730 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6731 {
6732 struct ppc_link_hash_entry *eh;
6733 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6734
6735 if (h->root.type == bfd_link_hash_indirect)
6736 return TRUE;
6737
6738 if (h->root.type == bfd_link_hash_warning)
6739 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6740
6741 if (h->root.type != bfd_link_hash_defined
6742 && h->root.type != bfd_link_hash_defweak)
6743 return TRUE;
6744
6745 eh = (struct ppc_link_hash_entry *) h;
6746 if (eh->adjust_done)
6747 return TRUE;
6748
6749 if (eh->elf.root.u.def.section == toc_inf->toc)
6750 {
6751 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6752 if (skip != (unsigned long) -1)
6753 eh->elf.root.u.def.value -= skip;
6754 else
6755 {
6756 (*_bfd_error_handler)
6757 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6758 eh->elf.root.u.def.section = &bfd_abs_section;
6759 eh->elf.root.u.def.value = 0;
6760 }
6761 eh->adjust_done = 1;
6762 }
6763 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6764 toc_inf->global_toc_syms = TRUE;
6765
6766 return TRUE;
6767 }
6768
6769 /* Examine all relocs referencing .toc sections in order to remove
6770 unused .toc entries. */
6771
6772 bfd_boolean
6773 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6774 {
6775 bfd *ibfd;
6776 struct adjust_toc_info toc_inf;
6777
6778 toc_inf.global_toc_syms = TRUE;
6779 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6780 {
6781 asection *toc, *sec;
6782 Elf_Internal_Shdr *symtab_hdr;
6783 Elf_Internal_Sym *local_syms;
6784 struct elf_link_hash_entry **sym_hashes;
6785 Elf_Internal_Rela *relstart, *rel, *wrel;
6786 unsigned long *skip, *drop;
6787 unsigned char *used;
6788 unsigned char *keep, last, some_unused;
6789
6790 toc = bfd_get_section_by_name (ibfd, ".toc");
6791 if (toc == NULL
6792 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6793 || elf_discarded_section (toc))
6794 continue;
6795
6796 local_syms = NULL;
6797 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6798 sym_hashes = elf_sym_hashes (ibfd);
6799
6800 /* Look at sections dropped from the final link. */
6801 skip = NULL;
6802 relstart = NULL;
6803 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6804 {
6805 if (sec->reloc_count == 0
6806 || !elf_discarded_section (sec)
6807 || get_opd_info (sec)
6808 || (sec->flags & SEC_ALLOC) == 0
6809 || (sec->flags & SEC_DEBUGGING) != 0)
6810 continue;
6811
6812 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6813 if (relstart == NULL)
6814 goto error_ret;
6815
6816 /* Run through the relocs to see which toc entries might be
6817 unused. */
6818 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6819 {
6820 enum elf_ppc64_reloc_type r_type;
6821 unsigned long r_symndx;
6822 asection *sym_sec;
6823 struct elf_link_hash_entry *h;
6824 Elf_Internal_Sym *sym;
6825 bfd_vma val;
6826
6827 r_type = ELF64_R_TYPE (rel->r_info);
6828 switch (r_type)
6829 {
6830 default:
6831 continue;
6832
6833 case R_PPC64_TOC16:
6834 case R_PPC64_TOC16_LO:
6835 case R_PPC64_TOC16_HI:
6836 case R_PPC64_TOC16_HA:
6837 case R_PPC64_TOC16_DS:
6838 case R_PPC64_TOC16_LO_DS:
6839 break;
6840 }
6841
6842 r_symndx = ELF64_R_SYM (rel->r_info);
6843 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6844 r_symndx, ibfd))
6845 goto error_ret;
6846
6847 if (sym_sec != toc)
6848 continue;
6849
6850 if (h != NULL)
6851 val = h->root.u.def.value;
6852 else
6853 val = sym->st_value;
6854 val += rel->r_addend;
6855
6856 if (val >= toc->size)
6857 continue;
6858
6859 /* Anything in the toc ought to be aligned to 8 bytes.
6860 If not, don't mark as unused. */
6861 if (val & 7)
6862 continue;
6863
6864 if (skip == NULL)
6865 {
6866 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6867 if (skip == NULL)
6868 goto error_ret;
6869 }
6870
6871 skip[val >> 3] = 1;
6872 }
6873
6874 if (elf_section_data (sec)->relocs != relstart)
6875 free (relstart);
6876 }
6877
6878 if (skip == NULL)
6879 continue;
6880
6881 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6882 if (used == NULL)
6883 {
6884 error_ret:
6885 if (local_syms != NULL
6886 && symtab_hdr->contents != (unsigned char *) local_syms)
6887 free (local_syms);
6888 if (sec != NULL
6889 && relstart != NULL
6890 && elf_section_data (sec)->relocs != relstart)
6891 free (relstart);
6892 if (skip != NULL)
6893 free (skip);
6894 return FALSE;
6895 }
6896
6897 /* Now check all kept sections that might reference the toc. */
6898 for (sec = ibfd->sections;
6899 sec != NULL;
6900 /* Check the toc itself last. */
6901 sec = (sec == toc ? NULL
6902 : sec->next == toc && sec->next->next ? sec->next->next
6903 : sec->next == NULL ? toc
6904 : sec->next))
6905 {
6906 int repeat;
6907
6908 if (sec->reloc_count == 0
6909 || elf_discarded_section (sec)
6910 || get_opd_info (sec)
6911 || (sec->flags & SEC_ALLOC) == 0
6912 || (sec->flags & SEC_DEBUGGING) != 0)
6913 continue;
6914
6915 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
6916 if (relstart == NULL)
6917 goto error_ret;
6918
6919 /* Mark toc entries referenced as used. */
6920 repeat = 0;
6921 do
6922 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6923 {
6924 enum elf_ppc64_reloc_type r_type;
6925 unsigned long r_symndx;
6926 asection *sym_sec;
6927 struct elf_link_hash_entry *h;
6928 Elf_Internal_Sym *sym;
6929 bfd_vma val;
6930
6931 r_type = ELF64_R_TYPE (rel->r_info);
6932 switch (r_type)
6933 {
6934 case R_PPC64_TOC16:
6935 case R_PPC64_TOC16_LO:
6936 case R_PPC64_TOC16_HI:
6937 case R_PPC64_TOC16_HA:
6938 case R_PPC64_TOC16_DS:
6939 case R_PPC64_TOC16_LO_DS:
6940 /* In case we're taking addresses of toc entries. */
6941 case R_PPC64_ADDR64:
6942 break;
6943
6944 default:
6945 continue;
6946 }
6947
6948 r_symndx = ELF64_R_SYM (rel->r_info);
6949 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6950 r_symndx, ibfd))
6951 {
6952 free (used);
6953 goto error_ret;
6954 }
6955
6956 if (sym_sec != toc)
6957 continue;
6958
6959 if (h != NULL)
6960 val = h->root.u.def.value;
6961 else
6962 val = sym->st_value;
6963 val += rel->r_addend;
6964
6965 if (val >= toc->size)
6966 continue;
6967
6968 /* For the toc section, we only mark as used if
6969 this entry itself isn't unused. */
6970 if (sec == toc
6971 && !used[val >> 3]
6972 && (used[rel->r_offset >> 3]
6973 || !skip[rel->r_offset >> 3]))
6974 /* Do all the relocs again, to catch reference
6975 chains. */
6976 repeat = 1;
6977
6978 used[val >> 3] = 1;
6979 }
6980 while (repeat);
6981 }
6982
6983 /* Merge the used and skip arrays. Assume that TOC
6984 doublewords not appearing as either used or unused belong
6985 to to an entry more than one doubleword in size. */
6986 for (drop = skip, keep = used, last = 0, some_unused = 0;
6987 drop < skip + (toc->size + 7) / 8;
6988 ++drop, ++keep)
6989 {
6990 if (*keep)
6991 {
6992 *drop = 0;
6993 last = 0;
6994 }
6995 else if (*drop)
6996 {
6997 some_unused = 1;
6998 last = 1;
6999 }
7000 else
7001 *drop = last;
7002 }
7003
7004 free (used);
7005
7006 if (some_unused)
7007 {
7008 bfd_byte *contents, *src;
7009 unsigned long off;
7010
7011 /* Shuffle the toc contents, and at the same time convert the
7012 skip array from booleans into offsets. */
7013 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7014 goto error_ret;
7015
7016 elf_section_data (toc)->this_hdr.contents = contents;
7017
7018 for (src = contents, off = 0, drop = skip;
7019 src < contents + toc->size;
7020 src += 8, ++drop)
7021 {
7022 if (*drop)
7023 {
7024 *drop = (unsigned long) -1;
7025 off += 8;
7026 }
7027 else if (off != 0)
7028 {
7029 *drop = off;
7030 memcpy (src - off, src, 8);
7031 }
7032 }
7033 toc->rawsize = toc->size;
7034 toc->size = src - contents - off;
7035
7036 /* Read toc relocs. */
7037 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, TRUE);
7038 if (relstart == NULL)
7039 goto error_ret;
7040
7041 /* Remove unused toc relocs, and adjust those we keep. */
7042 wrel = relstart;
7043 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7044 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7045 {
7046 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7047 wrel->r_info = rel->r_info;
7048 wrel->r_addend = rel->r_addend;
7049 ++wrel;
7050 }
7051 toc->reloc_count = wrel - relstart;
7052 elf_section_data (toc)->rel_hdr.sh_size
7053 = toc->reloc_count * elf_section_data (toc)->rel_hdr.sh_entsize;
7054 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7055
7056 /* Adjust addends for relocs against the toc section sym. */
7057 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7058 {
7059 if (sec->reloc_count == 0
7060 || elf_discarded_section (sec))
7061 continue;
7062
7063 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7064 TRUE);
7065 if (relstart == NULL)
7066 goto error_ret;
7067
7068 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7069 {
7070 enum elf_ppc64_reloc_type r_type;
7071 unsigned long r_symndx;
7072 asection *sym_sec;
7073 struct elf_link_hash_entry *h;
7074 Elf_Internal_Sym *sym;
7075
7076 r_type = ELF64_R_TYPE (rel->r_info);
7077 switch (r_type)
7078 {
7079 default:
7080 continue;
7081
7082 case R_PPC64_TOC16:
7083 case R_PPC64_TOC16_LO:
7084 case R_PPC64_TOC16_HI:
7085 case R_PPC64_TOC16_HA:
7086 case R_PPC64_TOC16_DS:
7087 case R_PPC64_TOC16_LO_DS:
7088 case R_PPC64_ADDR64:
7089 break;
7090 }
7091
7092 r_symndx = ELF64_R_SYM (rel->r_info);
7093 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7094 r_symndx, ibfd))
7095 goto error_ret;
7096
7097 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7098 continue;
7099
7100 rel->r_addend -= skip[rel->r_addend >> 3];
7101 }
7102 }
7103
7104 /* We shouldn't have local or global symbols defined in the TOC,
7105 but handle them anyway. */
7106 if (local_syms != NULL)
7107 {
7108 Elf_Internal_Sym *sym;
7109
7110 for (sym = local_syms;
7111 sym < local_syms + symtab_hdr->sh_info;
7112 ++sym)
7113 if (sym->st_shndx != SHN_UNDEF
7114 && (sym->st_shndx < SHN_LORESERVE
7115 || sym->st_shndx > SHN_HIRESERVE)
7116 && sym->st_value != 0
7117 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7118 {
7119 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7120 sym->st_value -= skip[sym->st_value >> 3];
7121 else
7122 {
7123 (*_bfd_error_handler)
7124 (_("%s defined in removed toc entry"),
7125 bfd_elf_sym_name (ibfd, symtab_hdr, sym));
7126 sym->st_value = 0;
7127 sym->st_shndx = SHN_ABS;
7128 }
7129 symtab_hdr->contents = (unsigned char *) local_syms;
7130 }
7131 }
7132
7133 /* Finally, adjust any global syms defined in the toc. */
7134 if (toc_inf.global_toc_syms)
7135 {
7136 toc_inf.toc = toc;
7137 toc_inf.skip = skip;
7138 toc_inf.global_toc_syms = FALSE;
7139 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7140 &toc_inf);
7141 }
7142 }
7143
7144 if (local_syms != NULL
7145 && symtab_hdr->contents != (unsigned char *) local_syms)
7146 {
7147 if (!info->keep_memory)
7148 free (local_syms);
7149 else
7150 symtab_hdr->contents = (unsigned char *) local_syms;
7151 }
7152 free (skip);
7153 }
7154
7155 return TRUE;
7156 }
7157
7158 /* Allocate space in .plt, .got and associated reloc sections for
7159 dynamic relocs. */
7160
7161 static bfd_boolean
7162 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7163 {
7164 struct bfd_link_info *info;
7165 struct ppc_link_hash_table *htab;
7166 asection *s;
7167 struct ppc_link_hash_entry *eh;
7168 struct ppc_dyn_relocs *p;
7169 struct got_entry *gent;
7170
7171 if (h->root.type == bfd_link_hash_indirect)
7172 return TRUE;
7173
7174 if (h->root.type == bfd_link_hash_warning)
7175 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7176
7177 info = (struct bfd_link_info *) inf;
7178 htab = ppc_hash_table (info);
7179
7180 if (htab->elf.dynamic_sections_created
7181 && h->dynindx != -1
7182 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7183 {
7184 struct plt_entry *pent;
7185 bfd_boolean doneone = FALSE;
7186 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7187 if (pent->plt.refcount > 0)
7188 {
7189 /* If this is the first .plt entry, make room for the special
7190 first entry. */
7191 s = htab->plt;
7192 if (s->size == 0)
7193 s->size += PLT_INITIAL_ENTRY_SIZE;
7194
7195 pent->plt.offset = s->size;
7196
7197 /* Make room for this entry. */
7198 s->size += PLT_ENTRY_SIZE;
7199
7200 /* Make room for the .glink code. */
7201 s = htab->glink;
7202 if (s->size == 0)
7203 s->size += GLINK_CALL_STUB_SIZE;
7204 /* We need bigger stubs past index 32767. */
7205 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7206 s->size += 4;
7207 s->size += 2*4;
7208
7209 /* We also need to make an entry in the .rela.plt section. */
7210 s = htab->relplt;
7211 s->size += sizeof (Elf64_External_Rela);
7212 doneone = TRUE;
7213 }
7214 else
7215 pent->plt.offset = (bfd_vma) -1;
7216 if (!doneone)
7217 {
7218 h->plt.plist = NULL;
7219 h->needs_plt = 0;
7220 }
7221 }
7222 else
7223 {
7224 h->plt.plist = NULL;
7225 h->needs_plt = 0;
7226 }
7227
7228 eh = (struct ppc_link_hash_entry *) h;
7229 /* Run through the TLS GD got entries first if we're changing them
7230 to TPREL. */
7231 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7232 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7233 if (gent->got.refcount > 0
7234 && (gent->tls_type & TLS_GD) != 0)
7235 {
7236 /* This was a GD entry that has been converted to TPREL. If
7237 there happens to be a TPREL entry we can use that one. */
7238 struct got_entry *ent;
7239 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7240 if (ent->got.refcount > 0
7241 && (ent->tls_type & TLS_TPREL) != 0
7242 && ent->addend == gent->addend
7243 && ent->owner == gent->owner)
7244 {
7245 gent->got.refcount = 0;
7246 break;
7247 }
7248
7249 /* If not, then we'll be using our own TPREL entry. */
7250 if (gent->got.refcount != 0)
7251 gent->tls_type = TLS_TLS | TLS_TPREL;
7252 }
7253
7254 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7255 if (gent->got.refcount > 0)
7256 {
7257 bfd_boolean dyn;
7258
7259 /* Make sure this symbol is output as a dynamic symbol.
7260 Undefined weak syms won't yet be marked as dynamic,
7261 nor will all TLS symbols. */
7262 if (h->dynindx == -1
7263 && !h->forced_local)
7264 {
7265 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7266 return FALSE;
7267 }
7268
7269 if ((gent->tls_type & TLS_LD) != 0
7270 && !h->def_dynamic)
7271 {
7272 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7273 continue;
7274 }
7275
7276 s = ppc64_elf_tdata (gent->owner)->got;
7277 gent->got.offset = s->size;
7278 s->size
7279 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7280 dyn = htab->elf.dynamic_sections_created;
7281 if ((info->shared
7282 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7283 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7284 || h->root.type != bfd_link_hash_undefweak))
7285 ppc64_elf_tdata (gent->owner)->relgot->size
7286 += (gent->tls_type & eh->tls_mask & TLS_GD
7287 ? 2 * sizeof (Elf64_External_Rela)
7288 : sizeof (Elf64_External_Rela));
7289 }
7290 else
7291 gent->got.offset = (bfd_vma) -1;
7292
7293 if (eh->dyn_relocs == NULL)
7294 return TRUE;
7295
7296 /* In the shared -Bsymbolic case, discard space allocated for
7297 dynamic pc-relative relocs against symbols which turn out to be
7298 defined in regular objects. For the normal shared case, discard
7299 space for relocs that have become local due to symbol visibility
7300 changes. */
7301
7302 if (info->shared)
7303 {
7304 /* Relocs that use pc_count are those that appear on a call insn,
7305 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7306 generated via assembly. We want calls to protected symbols to
7307 resolve directly to the function rather than going via the plt.
7308 If people want function pointer comparisons to work as expected
7309 then they should avoid writing weird assembly. */
7310 if (SYMBOL_CALLS_LOCAL (info, h))
7311 {
7312 struct ppc_dyn_relocs **pp;
7313
7314 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7315 {
7316 p->count -= p->pc_count;
7317 p->pc_count = 0;
7318 if (p->count == 0)
7319 *pp = p->next;
7320 else
7321 pp = &p->next;
7322 }
7323 }
7324
7325 /* Also discard relocs on undefined weak syms with non-default
7326 visibility. */
7327 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7328 && h->root.type == bfd_link_hash_undefweak)
7329 eh->dyn_relocs = NULL;
7330 }
7331 else if (ELIMINATE_COPY_RELOCS)
7332 {
7333 /* For the non-shared case, discard space for relocs against
7334 symbols which turn out to need copy relocs or are not
7335 dynamic. */
7336
7337 if (!h->non_got_ref
7338 && h->def_dynamic
7339 && !h->def_regular)
7340 {
7341 /* Make sure this symbol is output as a dynamic symbol.
7342 Undefined weak syms won't yet be marked as dynamic. */
7343 if (h->dynindx == -1
7344 && !h->forced_local)
7345 {
7346 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7347 return FALSE;
7348 }
7349
7350 /* If that succeeded, we know we'll be keeping all the
7351 relocs. */
7352 if (h->dynindx != -1)
7353 goto keep;
7354 }
7355
7356 eh->dyn_relocs = NULL;
7357
7358 keep: ;
7359 }
7360
7361 /* Finally, allocate space. */
7362 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7363 {
7364 asection *sreloc = elf_section_data (p->sec)->sreloc;
7365 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7366 }
7367
7368 return TRUE;
7369 }
7370
7371 /* Find any dynamic relocs that apply to read-only sections. */
7372
7373 static bfd_boolean
7374 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7375 {
7376 struct ppc_link_hash_entry *eh;
7377 struct ppc_dyn_relocs *p;
7378
7379 if (h->root.type == bfd_link_hash_warning)
7380 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7381
7382 eh = (struct ppc_link_hash_entry *) h;
7383 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7384 {
7385 asection *s = p->sec->output_section;
7386
7387 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7388 {
7389 struct bfd_link_info *info = inf;
7390
7391 info->flags |= DF_TEXTREL;
7392
7393 /* Not an error, just cut short the traversal. */
7394 return FALSE;
7395 }
7396 }
7397 return TRUE;
7398 }
7399
7400 /* Set the sizes of the dynamic sections. */
7401
7402 static bfd_boolean
7403 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7404 struct bfd_link_info *info)
7405 {
7406 struct ppc_link_hash_table *htab;
7407 bfd *dynobj;
7408 asection *s;
7409 bfd_boolean relocs;
7410 bfd *ibfd;
7411
7412 htab = ppc_hash_table (info);
7413 dynobj = htab->elf.dynobj;
7414 if (dynobj == NULL)
7415 abort ();
7416
7417 if (htab->elf.dynamic_sections_created)
7418 {
7419 /* Set the contents of the .interp section to the interpreter. */
7420 if (info->executable)
7421 {
7422 s = bfd_get_section_by_name (dynobj, ".interp");
7423 if (s == NULL)
7424 abort ();
7425 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7426 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7427 }
7428 }
7429
7430 /* Set up .got offsets for local syms, and space for local dynamic
7431 relocs. */
7432 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7433 {
7434 struct got_entry **lgot_ents;
7435 struct got_entry **end_lgot_ents;
7436 char *lgot_masks;
7437 bfd_size_type locsymcount;
7438 Elf_Internal_Shdr *symtab_hdr;
7439 asection *srel;
7440
7441 if (!is_ppc64_elf_target (ibfd->xvec))
7442 continue;
7443
7444 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7445 {
7446 s = ppc64_elf_tdata (ibfd)->got;
7447 ppc64_tlsld_got (ibfd)->offset = s->size;
7448 s->size += 16;
7449 if (info->shared)
7450 {
7451 srel = ppc64_elf_tdata (ibfd)->relgot;
7452 srel->size += sizeof (Elf64_External_Rela);
7453 }
7454 }
7455 else
7456 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7457
7458 for (s = ibfd->sections; s != NULL; s = s->next)
7459 {
7460 struct ppc_dyn_relocs *p;
7461
7462 for (p = *((struct ppc_dyn_relocs **)
7463 &elf_section_data (s)->local_dynrel);
7464 p != NULL;
7465 p = p->next)
7466 {
7467 if (!bfd_is_abs_section (p->sec)
7468 && bfd_is_abs_section (p->sec->output_section))
7469 {
7470 /* Input section has been discarded, either because
7471 it is a copy of a linkonce section or due to
7472 linker script /DISCARD/, so we'll be discarding
7473 the relocs too. */
7474 }
7475 else if (p->count != 0)
7476 {
7477 srel = elf_section_data (p->sec)->sreloc;
7478 srel->size += p->count * sizeof (Elf64_External_Rela);
7479 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7480 info->flags |= DF_TEXTREL;
7481 }
7482 }
7483 }
7484
7485 lgot_ents = elf_local_got_ents (ibfd);
7486 if (!lgot_ents)
7487 continue;
7488
7489 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7490 locsymcount = symtab_hdr->sh_info;
7491 end_lgot_ents = lgot_ents + locsymcount;
7492 lgot_masks = (char *) end_lgot_ents;
7493 s = ppc64_elf_tdata (ibfd)->got;
7494 srel = ppc64_elf_tdata (ibfd)->relgot;
7495 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7496 {
7497 struct got_entry *ent;
7498
7499 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7500 if (ent->got.refcount > 0)
7501 {
7502 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7503 {
7504 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7505 {
7506 ppc64_tlsld_got (ibfd)->offset = s->size;
7507 s->size += 16;
7508 if (info->shared)
7509 srel->size += sizeof (Elf64_External_Rela);
7510 }
7511 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7512 }
7513 else
7514 {
7515 ent->got.offset = s->size;
7516 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7517 {
7518 s->size += 16;
7519 if (info->shared)
7520 srel->size += 2 * sizeof (Elf64_External_Rela);
7521 }
7522 else
7523 {
7524 s->size += 8;
7525 if (info->shared)
7526 srel->size += sizeof (Elf64_External_Rela);
7527 }
7528 }
7529 }
7530 else
7531 ent->got.offset = (bfd_vma) -1;
7532 }
7533 }
7534
7535 /* Allocate global sym .plt and .got entries, and space for global
7536 sym dynamic relocs. */
7537 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7538
7539 /* We now have determined the sizes of the various dynamic sections.
7540 Allocate memory for them. */
7541 relocs = FALSE;
7542 for (s = dynobj->sections; s != NULL; s = s->next)
7543 {
7544 if ((s->flags & SEC_LINKER_CREATED) == 0)
7545 continue;
7546
7547 if (s == htab->brlt || s == htab->relbrlt)
7548 /* These haven't been allocated yet; don't strip. */
7549 continue;
7550 else if (s == htab->got
7551 || s == htab->plt
7552 || s == htab->glink)
7553 {
7554 /* Strip this section if we don't need it; see the
7555 comment below. */
7556 }
7557 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7558 {
7559 if (s->size == 0)
7560 {
7561 /* If we don't need this section, strip it from the
7562 output file. This is mostly to handle .rela.bss and
7563 .rela.plt. We must create both sections in
7564 create_dynamic_sections, because they must be created
7565 before the linker maps input sections to output
7566 sections. The linker does that before
7567 adjust_dynamic_symbol is called, and it is that
7568 function which decides whether anything needs to go
7569 into these sections. */
7570 }
7571 else
7572 {
7573 if (s != htab->relplt)
7574 relocs = TRUE;
7575
7576 /* We use the reloc_count field as a counter if we need
7577 to copy relocs into the output file. */
7578 s->reloc_count = 0;
7579 }
7580 }
7581 else
7582 {
7583 /* It's not one of our sections, so don't allocate space. */
7584 continue;
7585 }
7586
7587 if (s->size == 0)
7588 {
7589 _bfd_strip_section_from_output (info, s);
7590 continue;
7591 }
7592
7593 /* .plt is in the bss section. We don't initialise it. */
7594 if (s == htab->plt)
7595 continue;
7596
7597 /* Allocate memory for the section contents. We use bfd_zalloc
7598 here in case unused entries are not reclaimed before the
7599 section's contents are written out. This should not happen,
7600 but this way if it does we get a R_PPC64_NONE reloc in .rela
7601 sections instead of garbage.
7602 We also rely on the section contents being zero when writing
7603 the GOT. */
7604 s->contents = bfd_zalloc (dynobj, s->size);
7605 if (s->contents == NULL)
7606 return FALSE;
7607 }
7608
7609 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7610 {
7611 if (!is_ppc64_elf_target (ibfd->xvec))
7612 continue;
7613
7614 s = ppc64_elf_tdata (ibfd)->got;
7615 if (s != NULL && s != htab->got)
7616 {
7617 if (s->size == 0)
7618 _bfd_strip_section_from_output (info, s);
7619 else
7620 {
7621 s->contents = bfd_zalloc (ibfd, s->size);
7622 if (s->contents == NULL)
7623 return FALSE;
7624 }
7625 }
7626 s = ppc64_elf_tdata (ibfd)->relgot;
7627 if (s != NULL)
7628 {
7629 if (s->size == 0)
7630 _bfd_strip_section_from_output (info, s);
7631 else
7632 {
7633 s->contents = bfd_zalloc (ibfd, s->size);
7634 if (s->contents == NULL)
7635 return FALSE;
7636 relocs = TRUE;
7637 s->reloc_count = 0;
7638 }
7639 }
7640 }
7641
7642 if (htab->elf.dynamic_sections_created)
7643 {
7644 /* Add some entries to the .dynamic section. We fill in the
7645 values later, in ppc64_elf_finish_dynamic_sections, but we
7646 must add the entries now so that we get the correct size for
7647 the .dynamic section. The DT_DEBUG entry is filled in by the
7648 dynamic linker and used by the debugger. */
7649 #define add_dynamic_entry(TAG, VAL) \
7650 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7651
7652 if (info->executable)
7653 {
7654 if (!add_dynamic_entry (DT_DEBUG, 0))
7655 return FALSE;
7656 }
7657
7658 if (htab->plt != NULL && htab->plt->size != 0)
7659 {
7660 if (!add_dynamic_entry (DT_PLTGOT, 0)
7661 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7662 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7663 || !add_dynamic_entry (DT_JMPREL, 0)
7664 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7665 return FALSE;
7666 }
7667
7668 if (NO_OPD_RELOCS)
7669 {
7670 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7671 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7672 return FALSE;
7673 }
7674
7675 if (relocs)
7676 {
7677 if (!add_dynamic_entry (DT_RELA, 0)
7678 || !add_dynamic_entry (DT_RELASZ, 0)
7679 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7680 return FALSE;
7681
7682 /* If any dynamic relocs apply to a read-only section,
7683 then we need a DT_TEXTREL entry. */
7684 if ((info->flags & DF_TEXTREL) == 0)
7685 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7686
7687 if ((info->flags & DF_TEXTREL) != 0)
7688 {
7689 if (!add_dynamic_entry (DT_TEXTREL, 0))
7690 return FALSE;
7691 }
7692 }
7693 }
7694 #undef add_dynamic_entry
7695
7696 return TRUE;
7697 }
7698
7699 /* Determine the type of stub needed, if any, for a call. */
7700
7701 static inline enum ppc_stub_type
7702 ppc_type_of_stub (asection *input_sec,
7703 const Elf_Internal_Rela *rel,
7704 struct ppc_link_hash_entry **hash,
7705 bfd_vma destination)
7706 {
7707 struct ppc_link_hash_entry *h = *hash;
7708 bfd_vma location;
7709 bfd_vma branch_offset;
7710 bfd_vma max_branch_offset;
7711 enum elf_ppc64_reloc_type r_type;
7712
7713 if (h != NULL)
7714 {
7715 if (h->oh != NULL
7716 && h->oh->is_func_descriptor)
7717 h = h->oh;
7718
7719 if (h->elf.dynindx != -1)
7720 {
7721 struct plt_entry *ent;
7722
7723 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7724 if (ent->addend == rel->r_addend
7725 && ent->plt.offset != (bfd_vma) -1)
7726 {
7727 *hash = h;
7728 return ppc_stub_plt_call;
7729 }
7730 }
7731
7732 if (!(h->elf.root.type == bfd_link_hash_defined
7733 || h->elf.root.type == bfd_link_hash_defweak)
7734 || h->elf.root.u.def.section->output_section == NULL)
7735 return ppc_stub_none;
7736 }
7737
7738 /* Determine where the call point is. */
7739 location = (input_sec->output_offset
7740 + input_sec->output_section->vma
7741 + rel->r_offset);
7742
7743 branch_offset = destination - location;
7744 r_type = ELF64_R_TYPE (rel->r_info);
7745
7746 /* Determine if a long branch stub is needed. */
7747 max_branch_offset = 1 << 25;
7748 if (r_type != R_PPC64_REL24)
7749 max_branch_offset = 1 << 15;
7750
7751 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7752 /* We need a stub. Figure out whether a long_branch or plt_branch
7753 is needed later. */
7754 return ppc_stub_long_branch;
7755
7756 return ppc_stub_none;
7757 }
7758
7759 /* Build a .plt call stub. */
7760
7761 static inline bfd_byte *
7762 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7763 {
7764 #define PPC_LO(v) ((v) & 0xffff)
7765 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7766 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7767
7768 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7769 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7770 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7771 if (PPC_HA (offset + 8) != PPC_HA (offset))
7772 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7773 offset += 8;
7774 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7775 if (PPC_HA (offset + 8) != PPC_HA (offset))
7776 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7777 offset += 8;
7778 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7779 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7780 bfd_put_32 (obfd, BCTR, p), p += 4;
7781 return p;
7782 }
7783
7784 static bfd_boolean
7785 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7786 {
7787 struct ppc_stub_hash_entry *stub_entry;
7788 struct ppc_branch_hash_entry *br_entry;
7789 struct bfd_link_info *info;
7790 struct ppc_link_hash_table *htab;
7791 bfd_byte *loc;
7792 bfd_byte *p;
7793 unsigned int indx;
7794 struct plt_entry *ent;
7795 bfd_vma dest, off;
7796 int size;
7797
7798 /* Massage our args to the form they really have. */
7799 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7800 info = in_arg;
7801
7802 htab = ppc_hash_table (info);
7803
7804 /* Make a note of the offset within the stubs for this entry. */
7805 stub_entry->stub_offset = stub_entry->stub_sec->size;
7806 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7807
7808 htab->stub_count[stub_entry->stub_type - 1] += 1;
7809 switch (stub_entry->stub_type)
7810 {
7811 case ppc_stub_long_branch:
7812 case ppc_stub_long_branch_r2off:
7813 /* Branches are relative. This is where we are going to. */
7814 off = dest = (stub_entry->target_value
7815 + stub_entry->target_section->output_offset
7816 + stub_entry->target_section->output_section->vma);
7817
7818 /* And this is where we are coming from. */
7819 off -= (stub_entry->stub_offset
7820 + stub_entry->stub_sec->output_offset
7821 + stub_entry->stub_sec->output_section->vma);
7822
7823 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7824 size = 4;
7825 else
7826 {
7827 bfd_vma r2off;
7828
7829 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7830 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7831 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7832 loc += 4;
7833 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7834 loc += 4;
7835 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7836 loc += 4;
7837 off -= 12;
7838 size = 16;
7839 }
7840 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7841
7842 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7843
7844 if (info->emitrelocations)
7845 {
7846 Elf_Internal_Rela *relocs, *r;
7847 struct bfd_elf_section_data *elfsec_data;
7848
7849 elfsec_data = elf_section_data (stub_entry->stub_sec);
7850 relocs = elfsec_data->relocs;
7851 if (relocs == NULL)
7852 {
7853 bfd_size_type relsize;
7854 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7855 relocs = bfd_alloc (htab->stub_bfd, relsize);
7856 if (relocs == NULL)
7857 return FALSE;
7858 elfsec_data->relocs = relocs;
7859 elfsec_data->rel_hdr.sh_size = relsize;
7860 elfsec_data->rel_hdr.sh_entsize = 24;
7861 stub_entry->stub_sec->reloc_count = 0;
7862 }
7863 r = relocs + stub_entry->stub_sec->reloc_count;
7864 stub_entry->stub_sec->reloc_count += 1;
7865 r->r_offset = loc - stub_entry->stub_sec->contents;
7866 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7867 r->r_addend = dest;
7868 if (stub_entry->h != NULL)
7869 {
7870 struct elf_link_hash_entry **hashes;
7871 unsigned long symndx;
7872 struct ppc_link_hash_entry *h;
7873
7874 hashes = elf_sym_hashes (htab->stub_bfd);
7875 if (hashes == NULL)
7876 {
7877 bfd_size_type hsize;
7878
7879 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7880 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7881 if (hashes == NULL)
7882 return FALSE;
7883 elf_sym_hashes (htab->stub_bfd) = hashes;
7884 htab->stub_globals = 1;
7885 }
7886 symndx = htab->stub_globals++;
7887 h = stub_entry->h;
7888 hashes[symndx] = &h->elf;
7889 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7890 if (h->oh != NULL && h->oh->is_func)
7891 h = h->oh;
7892 if (h->elf.root.u.def.section != stub_entry->target_section)
7893 /* H is an opd symbol. The addend must be zero. */
7894 r->r_addend = 0;
7895 else
7896 {
7897 off = (h->elf.root.u.def.value
7898 + h->elf.root.u.def.section->output_offset
7899 + h->elf.root.u.def.section->output_section->vma);
7900 r->r_addend -= off;
7901 }
7902 }
7903 }
7904 break;
7905
7906 case ppc_stub_plt_branch:
7907 case ppc_stub_plt_branch_r2off:
7908 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7909 stub_entry->root.string + 9,
7910 FALSE, FALSE);
7911 if (br_entry == NULL)
7912 {
7913 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7914 stub_entry->root.string + 9);
7915 htab->stub_error = TRUE;
7916 return FALSE;
7917 }
7918
7919 off = (stub_entry->target_value
7920 + stub_entry->target_section->output_offset
7921 + stub_entry->target_section->output_section->vma);
7922
7923 bfd_put_64 (htab->brlt->owner, off,
7924 htab->brlt->contents + br_entry->offset);
7925
7926 if (htab->relbrlt != NULL)
7927 {
7928 /* Create a reloc for the branch lookup table entry. */
7929 Elf_Internal_Rela rela;
7930 bfd_byte *rl;
7931
7932 rela.r_offset = (br_entry->offset
7933 + htab->brlt->output_offset
7934 + htab->brlt->output_section->vma);
7935 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7936 rela.r_addend = off;
7937
7938 rl = htab->relbrlt->contents;
7939 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7940 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7941 }
7942
7943 off = (br_entry->offset
7944 + htab->brlt->output_offset
7945 + htab->brlt->output_section->vma
7946 - elf_gp (htab->brlt->output_section->owner)
7947 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7948
7949 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7950 {
7951 (*_bfd_error_handler)
7952 (_("linkage table error against `%s'"),
7953 stub_entry->root.string);
7954 bfd_set_error (bfd_error_bad_value);
7955 htab->stub_error = TRUE;
7956 return FALSE;
7957 }
7958
7959 indx = off;
7960 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7961 {
7962 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7963 loc += 4;
7964 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7965 size = 16;
7966 }
7967 else
7968 {
7969 bfd_vma r2off;
7970
7971 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7972 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7973 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7974 loc += 4;
7975 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7976 loc += 4;
7977 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7978 loc += 4;
7979 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7980 loc += 4;
7981 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7982 size = 28;
7983 }
7984 loc += 4;
7985 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7986 loc += 4;
7987 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7988 break;
7989
7990 case ppc_stub_plt_call:
7991 /* Do the best we can for shared libraries built without
7992 exporting ".foo" for each "foo". This can happen when symbol
7993 versioning scripts strip all bar a subset of symbols. */
7994 if (stub_entry->h->oh != NULL
7995 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7996 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7997 {
7998 /* Point the symbol at the stub. There may be multiple stubs,
7999 we don't really care; The main thing is to make this sym
8000 defined somewhere. Maybe defining the symbol in the stub
8001 section is a silly idea. If we didn't do this, htab->top_id
8002 could disappear. */
8003 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8004 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8005 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8006 }
8007
8008 /* Now build the stub. */
8009 off = (bfd_vma) -1;
8010 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8011 if (ent->addend == stub_entry->addend)
8012 {
8013 off = ent->plt.offset;
8014 break;
8015 }
8016 if (off >= (bfd_vma) -2)
8017 abort ();
8018
8019 off &= ~ (bfd_vma) 1;
8020 off += (htab->plt->output_offset
8021 + htab->plt->output_section->vma
8022 - elf_gp (htab->plt->output_section->owner)
8023 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8024
8025 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8026 {
8027 (*_bfd_error_handler)
8028 (_("linkage table error against `%s'"),
8029 stub_entry->h->elf.root.root.string);
8030 bfd_set_error (bfd_error_bad_value);
8031 htab->stub_error = TRUE;
8032 return FALSE;
8033 }
8034
8035 p = build_plt_stub (htab->stub_bfd, loc, off);
8036 size = p - loc;
8037 break;
8038
8039 default:
8040 BFD_FAIL ();
8041 return FALSE;
8042 }
8043
8044 stub_entry->stub_sec->size += size;
8045
8046 if (htab->emit_stub_syms)
8047 {
8048 struct elf_link_hash_entry *h;
8049 size_t len1, len2;
8050 char *name;
8051 const char *const stub_str[] = { "long_branch",
8052 "long_branch_r2off",
8053 "plt_branch",
8054 "plt_branch_r2off",
8055 "plt_call" };
8056
8057 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8058 len2 = strlen (stub_entry->root.string);
8059 name = bfd_malloc (len1 + len2 + 2);
8060 if (name == NULL)
8061 return FALSE;
8062 memcpy (name, stub_entry->root.string, 9);
8063 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8064 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8065 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8066 if (h == NULL)
8067 return FALSE;
8068 if (h->root.type == bfd_link_hash_new)
8069 {
8070 h->root.type = bfd_link_hash_defined;
8071 h->root.u.def.section = stub_entry->stub_sec;
8072 h->root.u.def.value = stub_entry->stub_offset;
8073 h->ref_regular = 1;
8074 h->def_regular = 1;
8075 h->ref_regular_nonweak = 1;
8076 h->forced_local = 1;
8077 h->non_elf = 0;
8078 }
8079 }
8080
8081 return TRUE;
8082 }
8083
8084 /* As above, but don't actually build the stub. Just bump offset so
8085 we know stub section sizes, and select plt_branch stubs where
8086 long_branch stubs won't do. */
8087
8088 static bfd_boolean
8089 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8090 {
8091 struct ppc_stub_hash_entry *stub_entry;
8092 struct bfd_link_info *info;
8093 struct ppc_link_hash_table *htab;
8094 bfd_vma off;
8095 int size;
8096
8097 /* Massage our args to the form they really have. */
8098 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8099 info = in_arg;
8100
8101 htab = ppc_hash_table (info);
8102
8103 if (stub_entry->stub_type == ppc_stub_plt_call)
8104 {
8105 struct plt_entry *ent;
8106 off = (bfd_vma) -1;
8107 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8108 if (ent->addend == stub_entry->addend)
8109 {
8110 off = ent->plt.offset & ~(bfd_vma) 1;
8111 break;
8112 }
8113 if (off >= (bfd_vma) -2)
8114 abort ();
8115 off += (htab->plt->output_offset
8116 + htab->plt->output_section->vma
8117 - elf_gp (htab->plt->output_section->owner)
8118 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8119
8120 size = PLT_CALL_STUB_SIZE;
8121 if (PPC_HA (off + 16) != PPC_HA (off))
8122 size += 4;
8123 }
8124 else
8125 {
8126 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8127 variants. */
8128 off = (stub_entry->target_value
8129 + stub_entry->target_section->output_offset
8130 + stub_entry->target_section->output_section->vma);
8131 off -= (stub_entry->stub_sec->size
8132 + stub_entry->stub_sec->output_offset
8133 + stub_entry->stub_sec->output_section->vma);
8134
8135 /* Reset the stub type from the plt variant in case we now
8136 can reach with a shorter stub. */
8137 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8138 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8139
8140 size = 4;
8141 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8142 {
8143 off -= 12;
8144 size = 16;
8145 }
8146
8147 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8148 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8149 {
8150 struct ppc_branch_hash_entry *br_entry;
8151
8152 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8153 stub_entry->root.string + 9,
8154 TRUE, FALSE);
8155 if (br_entry == NULL)
8156 {
8157 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8158 stub_entry->root.string + 9);
8159 htab->stub_error = TRUE;
8160 return FALSE;
8161 }
8162
8163 if (br_entry->iter != htab->stub_iteration)
8164 {
8165 br_entry->iter = htab->stub_iteration;
8166 br_entry->offset = htab->brlt->size;
8167 htab->brlt->size += 8;
8168
8169 if (htab->relbrlt != NULL)
8170 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8171 }
8172
8173 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8174 size = 16;
8175 if (stub_entry->stub_type != ppc_stub_plt_branch)
8176 size = 28;
8177 }
8178
8179 if (info->emitrelocations
8180 && (stub_entry->stub_type == ppc_stub_long_branch
8181 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8182 stub_entry->stub_sec->reloc_count += 1;
8183 }
8184
8185 stub_entry->stub_sec->size += size;
8186 return TRUE;
8187 }
8188
8189 /* Set up various things so that we can make a list of input sections
8190 for each output section included in the link. Returns -1 on error,
8191 0 when no stubs will be needed, and 1 on success. */
8192
8193 int
8194 ppc64_elf_setup_section_lists (bfd *output_bfd,
8195 struct bfd_link_info *info,
8196 int no_multi_toc)
8197 {
8198 bfd *input_bfd;
8199 int top_id, top_index, id;
8200 asection *section;
8201 asection **input_list;
8202 bfd_size_type amt;
8203 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8204
8205 htab->no_multi_toc = no_multi_toc;
8206
8207 if (htab->brlt == NULL)
8208 return 0;
8209
8210 /* Find the top input section id. */
8211 for (input_bfd = info->input_bfds, top_id = 3;
8212 input_bfd != NULL;
8213 input_bfd = input_bfd->link_next)
8214 {
8215 for (section = input_bfd->sections;
8216 section != NULL;
8217 section = section->next)
8218 {
8219 if (top_id < section->id)
8220 top_id = section->id;
8221 }
8222 }
8223
8224 htab->top_id = top_id;
8225 amt = sizeof (struct map_stub) * (top_id + 1);
8226 htab->stub_group = bfd_zmalloc (amt);
8227 if (htab->stub_group == NULL)
8228 return -1;
8229
8230 /* Set toc_off for com, und, abs and ind sections. */
8231 for (id = 0; id < 3; id++)
8232 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8233
8234 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8235
8236 /* We can't use output_bfd->section_count here to find the top output
8237 section index as some sections may have been removed, and
8238 _bfd_strip_section_from_output doesn't renumber the indices. */
8239 for (section = output_bfd->sections, top_index = 0;
8240 section != NULL;
8241 section = section->next)
8242 {
8243 if (top_index < section->index)
8244 top_index = section->index;
8245 }
8246
8247 htab->top_index = top_index;
8248 amt = sizeof (asection *) * (top_index + 1);
8249 input_list = bfd_zmalloc (amt);
8250 htab->input_list = input_list;
8251 if (input_list == NULL)
8252 return -1;
8253
8254 return 1;
8255 }
8256
8257 /* The linker repeatedly calls this function for each TOC input section
8258 and linker generated GOT section. Group input bfds such that the toc
8259 within a group is less than 64k in size. Will break with cute linker
8260 scripts that play games with dot in the output toc section. */
8261
8262 void
8263 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8264 {
8265 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8266
8267 if (!htab->no_multi_toc)
8268 {
8269 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8270 bfd_vma off = addr - htab->toc_curr;
8271
8272 if (off + isec->size > 0x10000)
8273 htab->toc_curr = addr;
8274
8275 elf_gp (isec->owner) = (htab->toc_curr
8276 - elf_gp (isec->output_section->owner)
8277 + TOC_BASE_OFF);
8278 }
8279 }
8280
8281 /* Called after the last call to the above function. */
8282
8283 void
8284 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8285 {
8286 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8287
8288 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8289
8290 /* toc_curr tracks the TOC offset used for code sections below in
8291 ppc64_elf_next_input_section. Start off at 0x8000. */
8292 htab->toc_curr = TOC_BASE_OFF;
8293 }
8294
8295 /* No toc references were found in ISEC. If the code in ISEC makes no
8296 calls, then there's no need to use toc adjusting stubs when branching
8297 into ISEC. Actually, indirect calls from ISEC are OK as they will
8298 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8299 needed, and 2 if a cyclical call-graph was found but no other reason
8300 for a stub was detected. If called from the top level, a return of
8301 2 means the same as a return of 0. */
8302
8303 static int
8304 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8305 {
8306 Elf_Internal_Rela *relstart, *rel;
8307 Elf_Internal_Sym *local_syms;
8308 int ret;
8309 struct ppc_link_hash_table *htab;
8310
8311 /* We know none of our code bearing sections will need toc stubs. */
8312 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8313 return 0;
8314
8315 if (isec->size == 0)
8316 return 0;
8317
8318 if (isec->output_section == NULL)
8319 return 0;
8320
8321 /* Hack for linux kernel. .fixup contains branches, but only back to
8322 the function that hit an exception. */
8323 if (strcmp (isec->name, ".fixup") == 0)
8324 return 0;
8325
8326 if (isec->reloc_count == 0)
8327 return 0;
8328
8329 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8330 info->keep_memory);
8331 if (relstart == NULL)
8332 return -1;
8333
8334 /* Look for branches to outside of this section. */
8335 local_syms = NULL;
8336 ret = 0;
8337 htab = ppc_hash_table (info);
8338 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8339 {
8340 enum elf_ppc64_reloc_type r_type;
8341 unsigned long r_symndx;
8342 struct elf_link_hash_entry *h;
8343 Elf_Internal_Sym *sym;
8344 asection *sym_sec;
8345 long *opd_adjust;
8346 bfd_vma sym_value;
8347 bfd_vma dest;
8348
8349 r_type = ELF64_R_TYPE (rel->r_info);
8350 if (r_type != R_PPC64_REL24
8351 && r_type != R_PPC64_REL14
8352 && r_type != R_PPC64_REL14_BRTAKEN
8353 && r_type != R_PPC64_REL14_BRNTAKEN)
8354 continue;
8355
8356 r_symndx = ELF64_R_SYM (rel->r_info);
8357 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8358 isec->owner))
8359 {
8360 ret = -1;
8361 break;
8362 }
8363
8364 /* Calls to dynamic lib functions go through a plt call stub
8365 that uses r2. Branches to undefined symbols might be a call
8366 using old-style dot symbols that can be satisfied by a plt
8367 call into a new-style dynamic library. */
8368 if (sym_sec == NULL)
8369 {
8370 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8371 if (eh != NULL
8372 && eh->oh != NULL
8373 && eh->oh->elf.plt.plist != NULL)
8374 {
8375 ret = 1;
8376 break;
8377 }
8378
8379 /* Ignore other undefined symbols. */
8380 continue;
8381 }
8382
8383 /* Assume branches to other sections not included in the link need
8384 stubs too, to cover -R and absolute syms. */
8385 if (sym_sec->output_section == NULL)
8386 {
8387 ret = 1;
8388 break;
8389 }
8390
8391 if (h == NULL)
8392 sym_value = sym->st_value;
8393 else
8394 {
8395 if (h->root.type != bfd_link_hash_defined
8396 && h->root.type != bfd_link_hash_defweak)
8397 abort ();
8398 sym_value = h->root.u.def.value;
8399 }
8400 sym_value += rel->r_addend;
8401
8402 /* If this branch reloc uses an opd sym, find the code section. */
8403 opd_adjust = get_opd_info (sym_sec);
8404 if (opd_adjust != NULL)
8405 {
8406 if (h == NULL)
8407 {
8408 long adjust;
8409
8410 adjust = opd_adjust[sym->st_value / 8];
8411 if (adjust == -1)
8412 /* Assume deleted functions won't ever be called. */
8413 continue;
8414 sym_value += adjust;
8415 }
8416
8417 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8418 if (dest == (bfd_vma) -1)
8419 continue;
8420 }
8421 else
8422 dest = (sym_value
8423 + sym_sec->output_offset
8424 + sym_sec->output_section->vma);
8425
8426 /* Ignore branch to self. */
8427 if (sym_sec == isec)
8428 continue;
8429
8430 /* If the called function uses the toc, we need a stub. */
8431 if (sym_sec->has_toc_reloc
8432 || sym_sec->makes_toc_func_call)
8433 {
8434 ret = 1;
8435 break;
8436 }
8437
8438 /* Assume any branch that needs a long branch stub might in fact
8439 need a plt_branch stub. A plt_branch stub uses r2. */
8440 else if (dest - (isec->output_offset
8441 + isec->output_section->vma
8442 + rel->r_offset) + (1 << 25) >= (2 << 25))
8443 {
8444 ret = 1;
8445 break;
8446 }
8447
8448 /* If calling back to a section in the process of being tested, we
8449 can't say for sure that no toc adjusting stubs are needed, so
8450 don't return zero. */
8451 else if (sym_sec->call_check_in_progress)
8452 ret = 2;
8453
8454 /* Branches to another section that itself doesn't have any TOC
8455 references are OK. Recursively call ourselves to check. */
8456 else if (sym_sec->id <= htab->top_id
8457 && htab->stub_group[sym_sec->id].toc_off == 0)
8458 {
8459 int recur;
8460
8461 /* Mark current section as indeterminate, so that other
8462 sections that call back to current won't be marked as
8463 known. */
8464 isec->call_check_in_progress = 1;
8465 recur = toc_adjusting_stub_needed (info, sym_sec);
8466 isec->call_check_in_progress = 0;
8467
8468 if (recur < 0)
8469 {
8470 /* An error. Exit. */
8471 ret = -1;
8472 break;
8473 }
8474 else if (recur <= 1)
8475 {
8476 /* Known result. Mark as checked and set section flag. */
8477 htab->stub_group[sym_sec->id].toc_off = 1;
8478 if (recur != 0)
8479 {
8480 sym_sec->makes_toc_func_call = 1;
8481 ret = 1;
8482 break;
8483 }
8484 }
8485 else
8486 {
8487 /* Unknown result. Continue checking. */
8488 ret = 2;
8489 }
8490 }
8491 }
8492
8493 if (local_syms != NULL
8494 && (elf_tdata (isec->owner)->symtab_hdr.contents
8495 != (unsigned char *) local_syms))
8496 free (local_syms);
8497 if (elf_section_data (isec)->relocs != relstart)
8498 free (relstart);
8499
8500 return ret;
8501 }
8502
8503 /* The linker repeatedly calls this function for each input section,
8504 in the order that input sections are linked into output sections.
8505 Build lists of input sections to determine groupings between which
8506 we may insert linker stubs. */
8507
8508 bfd_boolean
8509 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8510 {
8511 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8512
8513 if ((isec->output_section->flags & SEC_CODE) != 0
8514 && isec->output_section->index <= htab->top_index)
8515 {
8516 asection **list = htab->input_list + isec->output_section->index;
8517 /* Steal the link_sec pointer for our list. */
8518 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8519 /* This happens to make the list in reverse order,
8520 which is what we want. */
8521 PREV_SEC (isec) = *list;
8522 *list = isec;
8523 }
8524
8525 if (htab->multi_toc_needed)
8526 {
8527 /* If a code section has a function that uses the TOC then we need
8528 to use the right TOC (obviously). Also, make sure that .opd gets
8529 the correct TOC value for R_PPC64_TOC relocs that don't have or
8530 can't find their function symbol (shouldn't ever happen now). */
8531 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8532 {
8533 if (elf_gp (isec->owner) != 0)
8534 htab->toc_curr = elf_gp (isec->owner);
8535 }
8536 else if (htab->stub_group[isec->id].toc_off == 0)
8537 {
8538 int ret = toc_adjusting_stub_needed (info, isec);
8539 if (ret < 0)
8540 return FALSE;
8541 else
8542 isec->makes_toc_func_call = ret & 1;
8543 }
8544 }
8545
8546 /* Functions that don't use the TOC can belong in any TOC group.
8547 Use the last TOC base. This happens to make _init and _fini
8548 pasting work. */
8549 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8550 return TRUE;
8551 }
8552
8553 /* See whether we can group stub sections together. Grouping stub
8554 sections may result in fewer stubs. More importantly, we need to
8555 put all .init* and .fini* stubs at the beginning of the .init or
8556 .fini output sections respectively, because glibc splits the
8557 _init and _fini functions into multiple parts. Putting a stub in
8558 the middle of a function is not a good idea. */
8559
8560 static void
8561 group_sections (struct ppc_link_hash_table *htab,
8562 bfd_size_type stub_group_size,
8563 bfd_boolean stubs_always_before_branch)
8564 {
8565 asection **list = htab->input_list + htab->top_index;
8566 do
8567 {
8568 asection *tail = *list;
8569 while (tail != NULL)
8570 {
8571 asection *curr;
8572 asection *prev;
8573 bfd_size_type total;
8574 bfd_boolean big_sec;
8575 bfd_vma curr_toc;
8576
8577 curr = tail;
8578 total = tail->size;
8579 big_sec = total >= stub_group_size;
8580 curr_toc = htab->stub_group[tail->id].toc_off;
8581
8582 while ((prev = PREV_SEC (curr)) != NULL
8583 && ((total += curr->output_offset - prev->output_offset)
8584 < stub_group_size)
8585 && htab->stub_group[prev->id].toc_off == curr_toc)
8586 curr = prev;
8587
8588 /* OK, the size from the start of CURR to the end is less
8589 than stub_group_size and thus can be handled by one stub
8590 section. (or the tail section is itself larger than
8591 stub_group_size, in which case we may be toast.) We
8592 should really be keeping track of the total size of stubs
8593 added here, as stubs contribute to the final output
8594 section size. That's a little tricky, and this way will
8595 only break if stubs added make the total size more than
8596 2^25, ie. for the default stub_group_size, if stubs total
8597 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8598 do
8599 {
8600 prev = PREV_SEC (tail);
8601 /* Set up this stub group. */
8602 htab->stub_group[tail->id].link_sec = curr;
8603 }
8604 while (tail != curr && (tail = prev) != NULL);
8605
8606 /* But wait, there's more! Input sections up to stub_group_size
8607 bytes before the stub section can be handled by it too.
8608 Don't do this if we have a really large section after the
8609 stubs, as adding more stubs increases the chance that
8610 branches may not reach into the stub section. */
8611 if (!stubs_always_before_branch && !big_sec)
8612 {
8613 total = 0;
8614 while (prev != NULL
8615 && ((total += tail->output_offset - prev->output_offset)
8616 < stub_group_size)
8617 && htab->stub_group[prev->id].toc_off == curr_toc)
8618 {
8619 tail = prev;
8620 prev = PREV_SEC (tail);
8621 htab->stub_group[tail->id].link_sec = curr;
8622 }
8623 }
8624 tail = prev;
8625 }
8626 }
8627 while (list-- != htab->input_list);
8628 free (htab->input_list);
8629 #undef PREV_SEC
8630 }
8631
8632 /* Determine and set the size of the stub section for a final link.
8633
8634 The basic idea here is to examine all the relocations looking for
8635 PC-relative calls to a target that is unreachable with a "bl"
8636 instruction. */
8637
8638 bfd_boolean
8639 ppc64_elf_size_stubs (bfd *output_bfd,
8640 struct bfd_link_info *info,
8641 bfd_signed_vma group_size,
8642 asection *(*add_stub_section) (const char *, asection *),
8643 void (*layout_sections_again) (void))
8644 {
8645 bfd_size_type stub_group_size;
8646 bfd_boolean stubs_always_before_branch;
8647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8648
8649 /* Stash our params away. */
8650 htab->add_stub_section = add_stub_section;
8651 htab->layout_sections_again = layout_sections_again;
8652 stubs_always_before_branch = group_size < 0;
8653 if (group_size < 0)
8654 stub_group_size = -group_size;
8655 else
8656 stub_group_size = group_size;
8657 if (stub_group_size == 1)
8658 {
8659 /* Default values. */
8660 if (stubs_always_before_branch)
8661 {
8662 stub_group_size = 0x1e00000;
8663 if (htab->has_14bit_branch)
8664 stub_group_size = 0x7800;
8665 }
8666 else
8667 {
8668 stub_group_size = 0x1c00000;
8669 if (htab->has_14bit_branch)
8670 stub_group_size = 0x7000;
8671 }
8672 }
8673
8674 group_sections (htab, stub_group_size, stubs_always_before_branch);
8675
8676 while (1)
8677 {
8678 bfd *input_bfd;
8679 unsigned int bfd_indx;
8680 asection *stub_sec;
8681 bfd_boolean stub_changed;
8682
8683 htab->stub_iteration += 1;
8684 stub_changed = FALSE;
8685
8686 for (input_bfd = info->input_bfds, bfd_indx = 0;
8687 input_bfd != NULL;
8688 input_bfd = input_bfd->link_next, bfd_indx++)
8689 {
8690 Elf_Internal_Shdr *symtab_hdr;
8691 asection *section;
8692 Elf_Internal_Sym *local_syms = NULL;
8693
8694 /* We'll need the symbol table in a second. */
8695 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8696 if (symtab_hdr->sh_info == 0)
8697 continue;
8698
8699 /* Walk over each section attached to the input bfd. */
8700 for (section = input_bfd->sections;
8701 section != NULL;
8702 section = section->next)
8703 {
8704 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8705
8706 /* If there aren't any relocs, then there's nothing more
8707 to do. */
8708 if ((section->flags & SEC_RELOC) == 0
8709 || section->reloc_count == 0)
8710 continue;
8711
8712 /* If this section is a link-once section that will be
8713 discarded, then don't create any stubs. */
8714 if (section->output_section == NULL
8715 || section->output_section->owner != output_bfd)
8716 continue;
8717
8718 /* Get the relocs. */
8719 internal_relocs
8720 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8721 info->keep_memory);
8722 if (internal_relocs == NULL)
8723 goto error_ret_free_local;
8724
8725 /* Now examine each relocation. */
8726 irela = internal_relocs;
8727 irelaend = irela + section->reloc_count;
8728 for (; irela < irelaend; irela++)
8729 {
8730 enum elf_ppc64_reloc_type r_type;
8731 unsigned int r_indx;
8732 enum ppc_stub_type stub_type;
8733 struct ppc_stub_hash_entry *stub_entry;
8734 asection *sym_sec, *code_sec;
8735 bfd_vma sym_value;
8736 bfd_vma destination;
8737 bfd_boolean ok_dest;
8738 struct ppc_link_hash_entry *hash;
8739 struct ppc_link_hash_entry *fdh;
8740 struct elf_link_hash_entry *h;
8741 Elf_Internal_Sym *sym;
8742 char *stub_name;
8743 const asection *id_sec;
8744 long *opd_adjust;
8745
8746 r_type = ELF64_R_TYPE (irela->r_info);
8747 r_indx = ELF64_R_SYM (irela->r_info);
8748
8749 if (r_type >= R_PPC64_max)
8750 {
8751 bfd_set_error (bfd_error_bad_value);
8752 goto error_ret_free_internal;
8753 }
8754
8755 /* Only look for stubs on branch instructions. */
8756 if (r_type != R_PPC64_REL24
8757 && r_type != R_PPC64_REL14
8758 && r_type != R_PPC64_REL14_BRTAKEN
8759 && r_type != R_PPC64_REL14_BRNTAKEN)
8760 continue;
8761
8762 /* Now determine the call target, its name, value,
8763 section. */
8764 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8765 r_indx, input_bfd))
8766 goto error_ret_free_internal;
8767 hash = (struct ppc_link_hash_entry *) h;
8768
8769 ok_dest = FALSE;
8770 fdh = NULL;
8771 if (hash == NULL)
8772 {
8773 sym_value = sym->st_value;
8774 ok_dest = TRUE;
8775 }
8776 else
8777 {
8778 sym_value = 0;
8779 /* Recognise an old ABI func code entry sym, and
8780 use the func descriptor sym instead. */
8781 if (hash->elf.root.type == bfd_link_hash_undefweak
8782 && hash->elf.root.root.string[0] == '.'
8783 && (fdh = get_fdh (hash, htab)) != NULL)
8784 {
8785 if (fdh->elf.root.type == bfd_link_hash_defined
8786 || fdh->elf.root.type == bfd_link_hash_defweak)
8787 {
8788 sym_sec = fdh->elf.root.u.def.section;
8789 sym_value = fdh->elf.root.u.def.value;
8790 if (sym_sec->output_section != NULL)
8791 ok_dest = TRUE;
8792 }
8793 else
8794 fdh = NULL;
8795 }
8796 else if (hash->elf.root.type == bfd_link_hash_defined
8797 || hash->elf.root.type == bfd_link_hash_defweak)
8798 {
8799 sym_value = hash->elf.root.u.def.value;
8800 if (sym_sec->output_section != NULL)
8801 ok_dest = TRUE;
8802 }
8803 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8804 ;
8805 else if (hash->elf.root.type == bfd_link_hash_undefined)
8806 ;
8807 else
8808 {
8809 bfd_set_error (bfd_error_bad_value);
8810 goto error_ret_free_internal;
8811 }
8812 }
8813
8814 destination = 0;
8815 if (ok_dest)
8816 {
8817 sym_value += irela->r_addend;
8818 destination = (sym_value
8819 + sym_sec->output_offset
8820 + sym_sec->output_section->vma);
8821 }
8822
8823 code_sec = sym_sec;
8824 opd_adjust = get_opd_info (sym_sec);
8825 if (opd_adjust != NULL)
8826 {
8827 bfd_vma dest;
8828
8829 if (hash == NULL)
8830 {
8831 long adjust = opd_adjust[sym_value / 8];
8832 if (adjust == -1)
8833 continue;
8834 sym_value += adjust;
8835 }
8836 dest = opd_entry_value (sym_sec, sym_value,
8837 &code_sec, &sym_value);
8838 if (dest != (bfd_vma) -1)
8839 {
8840 destination = dest;
8841 if (fdh != NULL)
8842 {
8843 /* Fixup old ABI sym to point at code
8844 entry. */
8845 hash->elf.root.type = bfd_link_hash_defweak;
8846 hash->elf.root.u.def.section = code_sec;
8847 hash->elf.root.u.def.value = sym_value;
8848 }
8849 }
8850 }
8851
8852 /* Determine what (if any) linker stub is needed. */
8853 stub_type = ppc_type_of_stub (section, irela, &hash,
8854 destination);
8855
8856 if (stub_type != ppc_stub_plt_call)
8857 {
8858 /* Check whether we need a TOC adjusting stub.
8859 Since the linker pastes together pieces from
8860 different object files when creating the
8861 _init and _fini functions, it may be that a
8862 call to what looks like a local sym is in
8863 fact a call needing a TOC adjustment. */
8864 if (code_sec != NULL
8865 && code_sec->output_section != NULL
8866 && (htab->stub_group[code_sec->id].toc_off
8867 != htab->stub_group[section->id].toc_off)
8868 && (code_sec->has_toc_reloc
8869 || code_sec->makes_toc_func_call))
8870 stub_type = ppc_stub_long_branch_r2off;
8871 }
8872
8873 if (stub_type == ppc_stub_none)
8874 continue;
8875
8876 /* __tls_get_addr calls might be eliminated. */
8877 if (stub_type != ppc_stub_plt_call
8878 && hash != NULL
8879 && (hash == htab->tls_get_addr
8880 || hash == htab->tls_get_addr_fd)
8881 && section->has_tls_reloc
8882 && irela != internal_relocs)
8883 {
8884 /* Get tls info. */
8885 char *tls_mask;
8886
8887 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8888 irela - 1, input_bfd))
8889 goto error_ret_free_internal;
8890 if (*tls_mask != 0)
8891 continue;
8892 }
8893
8894 /* Support for grouping stub sections. */
8895 id_sec = htab->stub_group[section->id].link_sec;
8896
8897 /* Get the name of this stub. */
8898 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8899 if (!stub_name)
8900 goto error_ret_free_internal;
8901
8902 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8903 stub_name, FALSE, FALSE);
8904 if (stub_entry != NULL)
8905 {
8906 /* The proper stub has already been created. */
8907 free (stub_name);
8908 continue;
8909 }
8910
8911 stub_entry = ppc_add_stub (stub_name, section, htab);
8912 if (stub_entry == NULL)
8913 {
8914 free (stub_name);
8915 error_ret_free_internal:
8916 if (elf_section_data (section)->relocs == NULL)
8917 free (internal_relocs);
8918 error_ret_free_local:
8919 if (local_syms != NULL
8920 && (symtab_hdr->contents
8921 != (unsigned char *) local_syms))
8922 free (local_syms);
8923 return FALSE;
8924 }
8925
8926 stub_entry->stub_type = stub_type;
8927 stub_entry->target_value = sym_value;
8928 stub_entry->target_section = code_sec;
8929 stub_entry->h = hash;
8930 stub_entry->addend = irela->r_addend;
8931
8932 if (stub_entry->h != NULL)
8933 htab->stub_globals += 1;
8934
8935 stub_changed = TRUE;
8936 }
8937
8938 /* We're done with the internal relocs, free them. */
8939 if (elf_section_data (section)->relocs != internal_relocs)
8940 free (internal_relocs);
8941 }
8942
8943 if (local_syms != NULL
8944 && symtab_hdr->contents != (unsigned char *) local_syms)
8945 {
8946 if (!info->keep_memory)
8947 free (local_syms);
8948 else
8949 symtab_hdr->contents = (unsigned char *) local_syms;
8950 }
8951 }
8952
8953 if (!stub_changed)
8954 break;
8955
8956 /* OK, we've added some stubs. Find out the new size of the
8957 stub sections. */
8958 for (stub_sec = htab->stub_bfd->sections;
8959 stub_sec != NULL;
8960 stub_sec = stub_sec->next)
8961 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8962 {
8963 stub_sec->size = 0;
8964 stub_sec->reloc_count = 0;
8965 }
8966
8967 htab->brlt->size = 0;
8968 if (htab->relbrlt != NULL)
8969 htab->relbrlt->size = 0;
8970
8971 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8972
8973 /* Ask the linker to do its stuff. */
8974 (*htab->layout_sections_again) ();
8975 }
8976
8977 /* It would be nice to strip .branch_lt from the output if the
8978 section is empty, but it's too late. If we strip sections here,
8979 the dynamic symbol table is corrupted since the section symbol
8980 for the stripped section isn't written. */
8981
8982 return TRUE;
8983 }
8984
8985 /* Called after we have determined section placement. If sections
8986 move, we'll be called again. Provide a value for TOCstart. */
8987
8988 bfd_vma
8989 ppc64_elf_toc (bfd *obfd)
8990 {
8991 asection *s;
8992 bfd_vma TOCstart;
8993
8994 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8995 order. The TOC starts where the first of these sections starts. */
8996 s = bfd_get_section_by_name (obfd, ".got");
8997 if (s == NULL)
8998 s = bfd_get_section_by_name (obfd, ".toc");
8999 if (s == NULL)
9000 s = bfd_get_section_by_name (obfd, ".tocbss");
9001 if (s == NULL)
9002 s = bfd_get_section_by_name (obfd, ".plt");
9003 if (s == NULL)
9004 {
9005 /* This may happen for
9006 o references to TOC base (SYM@toc / TOC[tc0]) without a
9007 .toc directive
9008 o bad linker script
9009 o --gc-sections and empty TOC sections
9010
9011 FIXME: Warn user? */
9012
9013 /* Look for a likely section. We probably won't even be
9014 using TOCstart. */
9015 for (s = obfd->sections; s != NULL; s = s->next)
9016 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9017 == (SEC_ALLOC | SEC_SMALL_DATA))
9018 break;
9019 if (s == NULL)
9020 for (s = obfd->sections; s != NULL; s = s->next)
9021 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9022 == (SEC_ALLOC | SEC_SMALL_DATA))
9023 break;
9024 if (s == NULL)
9025 for (s = obfd->sections; s != NULL; s = s->next)
9026 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9027 break;
9028 if (s == NULL)
9029 for (s = obfd->sections; s != NULL; s = s->next)
9030 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9031 break;
9032 }
9033
9034 TOCstart = 0;
9035 if (s != NULL)
9036 TOCstart = s->output_section->vma + s->output_offset;
9037
9038 return TOCstart;
9039 }
9040
9041 /* Build all the stubs associated with the current output file.
9042 The stubs are kept in a hash table attached to the main linker
9043 hash table. This function is called via gldelf64ppc_finish. */
9044
9045 bfd_boolean
9046 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9047 struct bfd_link_info *info,
9048 char **stats)
9049 {
9050 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9051 asection *stub_sec;
9052 bfd_byte *p;
9053 int stub_sec_count = 0;
9054
9055 htab->emit_stub_syms = emit_stub_syms;
9056
9057 /* Allocate memory to hold the linker stubs. */
9058 for (stub_sec = htab->stub_bfd->sections;
9059 stub_sec != NULL;
9060 stub_sec = stub_sec->next)
9061 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9062 && stub_sec->size != 0)
9063 {
9064 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9065 if (stub_sec->contents == NULL)
9066 return FALSE;
9067 /* We want to check that built size is the same as calculated
9068 size. rawsize is a convenient location to use. */
9069 stub_sec->rawsize = stub_sec->size;
9070 stub_sec->size = 0;
9071 }
9072
9073 if (htab->plt != NULL)
9074 {
9075 unsigned int indx;
9076 bfd_vma plt0;
9077
9078 /* Build the .glink plt call stub. */
9079 plt0 = (htab->plt->output_section->vma
9080 + htab->plt->output_offset
9081 - (htab->glink->output_section->vma
9082 + htab->glink->output_offset
9083 + GLINK_CALL_STUB_SIZE));
9084 if (plt0 + 0x80008000 > 0xffffffff)
9085 {
9086 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9087 bfd_set_error (bfd_error_bad_value);
9088 return FALSE;
9089 }
9090
9091 if (htab->emit_stub_syms)
9092 {
9093 struct elf_link_hash_entry *h;
9094 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9095 if (h == NULL)
9096 return FALSE;
9097 if (h->root.type == bfd_link_hash_new)
9098 {
9099 h->root.type = bfd_link_hash_defined;
9100 h->root.u.def.section = htab->glink;
9101 h->root.u.def.value = 0;
9102 h->ref_regular = 1;
9103 h->def_regular = 1;
9104 h->ref_regular_nonweak = 1;
9105 h->forced_local = 1;
9106 h->non_elf = 0;
9107 }
9108 }
9109 p = htab->glink->contents;
9110 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9111 p += 4;
9112 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9113 p += 4;
9114 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9115 p += 4;
9116 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9117 p += 4;
9118 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9119 p += 4;
9120 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9121 p += 4;
9122 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9123 p += 4;
9124 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9125 p += 4;
9126 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9127 p += 4;
9128 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9129 p += 4;
9130 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9131 p += 4;
9132 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9133 p += 4;
9134 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9135 p += 4;
9136 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9137 p += 4;
9138 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9139 p += 4;
9140 bfd_put_32 (htab->glink->owner, BCTR, p);
9141 p += 4;
9142
9143 /* Build the .glink lazy link call stubs. */
9144 indx = 0;
9145 while (p < htab->glink->contents + htab->glink->size)
9146 {
9147 if (indx < 0x8000)
9148 {
9149 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9150 p += 4;
9151 }
9152 else
9153 {
9154 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9155 p += 4;
9156 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9157 p += 4;
9158 }
9159 bfd_put_32 (htab->glink->owner,
9160 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9161 indx++;
9162 p += 4;
9163 }
9164 htab->glink->rawsize = p - htab->glink->contents;
9165 }
9166
9167 if (htab->brlt->size != 0)
9168 {
9169 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9170 htab->brlt->size);
9171 if (htab->brlt->contents == NULL)
9172 return FALSE;
9173 }
9174 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9175 {
9176 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9177 htab->relbrlt->size);
9178 if (htab->relbrlt->contents == NULL)
9179 return FALSE;
9180 }
9181
9182 /* Build the stubs as directed by the stub hash table. */
9183 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9184
9185 for (stub_sec = htab->stub_bfd->sections;
9186 stub_sec != NULL;
9187 stub_sec = stub_sec->next)
9188 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9189 {
9190 stub_sec_count += 1;
9191 if (stub_sec->rawsize != stub_sec->size)
9192 break;
9193 }
9194
9195 if (stub_sec != NULL
9196 || htab->glink->rawsize != htab->glink->size)
9197 {
9198 htab->stub_error = TRUE;
9199 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9200 }
9201
9202 if (htab->stub_error)
9203 return FALSE;
9204
9205 if (stats != NULL)
9206 {
9207 *stats = bfd_malloc (500);
9208 if (*stats == NULL)
9209 return FALSE;
9210
9211 sprintf (*stats, _("linker stubs in %u group%s\n"
9212 " branch %lu\n"
9213 " toc adjust %lu\n"
9214 " long branch %lu\n"
9215 " long toc adj %lu\n"
9216 " plt call %lu"),
9217 stub_sec_count,
9218 stub_sec_count == 1 ? "" : "s",
9219 htab->stub_count[ppc_stub_long_branch - 1],
9220 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9221 htab->stub_count[ppc_stub_plt_branch - 1],
9222 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9223 htab->stub_count[ppc_stub_plt_call - 1]);
9224 }
9225 return TRUE;
9226 }
9227
9228 /* This function undoes the changes made by add_symbol_adjust. */
9229
9230 static bfd_boolean
9231 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9232 {
9233 struct ppc_link_hash_entry *eh;
9234
9235 if (h->root.type == bfd_link_hash_indirect)
9236 return TRUE;
9237
9238 if (h->root.type == bfd_link_hash_warning)
9239 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9240
9241 eh = (struct ppc_link_hash_entry *) h;
9242 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9243 return TRUE;
9244
9245 eh->elf.root.type = bfd_link_hash_undefined;
9246 return TRUE;
9247 }
9248
9249 void
9250 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9251 {
9252 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9253 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9254 }
9255
9256 /* The RELOCATE_SECTION function is called by the ELF backend linker
9257 to handle the relocations for a section.
9258
9259 The relocs are always passed as Rela structures; if the section
9260 actually uses Rel structures, the r_addend field will always be
9261 zero.
9262
9263 This function is responsible for adjust the section contents as
9264 necessary, and (if using Rela relocs and generating a
9265 relocatable output file) adjusting the reloc addend as
9266 necessary.
9267
9268 This function does not have to worry about setting the reloc
9269 address or the reloc symbol index.
9270
9271 LOCAL_SYMS is a pointer to the swapped in local symbols.
9272
9273 LOCAL_SECTIONS is an array giving the section in the input file
9274 corresponding to the st_shndx field of each local symbol.
9275
9276 The global hash table entry for the global symbols can be found
9277 via elf_sym_hashes (input_bfd).
9278
9279 When generating relocatable output, this function must handle
9280 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9281 going to be the section symbol corresponding to the output
9282 section, which means that the addend must be adjusted
9283 accordingly. */
9284
9285 static bfd_boolean
9286 ppc64_elf_relocate_section (bfd *output_bfd,
9287 struct bfd_link_info *info,
9288 bfd *input_bfd,
9289 asection *input_section,
9290 bfd_byte *contents,
9291 Elf_Internal_Rela *relocs,
9292 Elf_Internal_Sym *local_syms,
9293 asection **local_sections)
9294 {
9295 struct ppc_link_hash_table *htab;
9296 Elf_Internal_Shdr *symtab_hdr;
9297 struct elf_link_hash_entry **sym_hashes;
9298 Elf_Internal_Rela *rel;
9299 Elf_Internal_Rela *relend;
9300 Elf_Internal_Rela outrel;
9301 bfd_byte *loc;
9302 struct got_entry **local_got_ents;
9303 bfd_vma TOCstart;
9304 bfd_boolean ret = TRUE;
9305 bfd_boolean is_opd;
9306 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9307 bfd_boolean is_power4 = FALSE;
9308
9309 if (info->relocatable)
9310 return TRUE;
9311
9312 /* Initialize howto table if needed. */
9313 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9314 ppc_howto_init ();
9315
9316 htab = ppc_hash_table (info);
9317
9318 /* Don't relocate stub sections. */
9319 if (input_section->owner == htab->stub_bfd)
9320 return TRUE;
9321
9322 local_got_ents = elf_local_got_ents (input_bfd);
9323 TOCstart = elf_gp (output_bfd);
9324 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9325 sym_hashes = elf_sym_hashes (input_bfd);
9326 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9327
9328 rel = relocs;
9329 relend = relocs + input_section->reloc_count;
9330 for (; rel < relend; rel++)
9331 {
9332 enum elf_ppc64_reloc_type r_type;
9333 bfd_vma addend;
9334 bfd_reloc_status_type r;
9335 Elf_Internal_Sym *sym;
9336 asection *sec;
9337 struct elf_link_hash_entry *h_elf;
9338 struct ppc_link_hash_entry *h;
9339 struct ppc_link_hash_entry *fdh;
9340 const char *sym_name;
9341 unsigned long r_symndx, toc_symndx;
9342 char tls_mask, tls_gd, tls_type;
9343 char sym_type;
9344 bfd_vma relocation;
9345 bfd_boolean unresolved_reloc;
9346 bfd_boolean warned;
9347 unsigned long insn, mask;
9348 struct ppc_stub_hash_entry *stub_entry;
9349 bfd_vma max_br_offset;
9350 bfd_vma from;
9351
9352 r_type = ELF64_R_TYPE (rel->r_info);
9353 r_symndx = ELF64_R_SYM (rel->r_info);
9354
9355 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9356 symbol of the previous ADDR64 reloc. The symbol gives us the
9357 proper TOC base to use. */
9358 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9359 && rel != relocs
9360 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9361 && is_opd)
9362 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9363
9364 sym = NULL;
9365 sec = NULL;
9366 h_elf = NULL;
9367 sym_name = NULL;
9368 unresolved_reloc = FALSE;
9369 warned = FALSE;
9370
9371 if (r_symndx < symtab_hdr->sh_info)
9372 {
9373 /* It's a local symbol. */
9374 long *opd_adjust;
9375
9376 sym = local_syms + r_symndx;
9377 sec = local_sections[r_symndx];
9378 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
9379 sym_type = ELF64_ST_TYPE (sym->st_info);
9380 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9381 opd_adjust = get_opd_info (sec);
9382 if (opd_adjust != NULL)
9383 {
9384 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9385 if (adjust == -1)
9386 relocation = 0;
9387 else
9388 relocation += adjust;
9389 }
9390 }
9391 else
9392 {
9393 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9394 r_symndx, symtab_hdr, sym_hashes,
9395 h_elf, sec, relocation,
9396 unresolved_reloc, warned);
9397 sym_name = h_elf->root.root.string;
9398 sym_type = h_elf->type;
9399 }
9400 h = (struct ppc_link_hash_entry *) h_elf;
9401
9402 /* TLS optimizations. Replace instruction sequences and relocs
9403 based on information we collected in tls_optimize. We edit
9404 RELOCS so that --emit-relocs will output something sensible
9405 for the final instruction stream. */
9406 tls_mask = 0;
9407 tls_gd = 0;
9408 toc_symndx = 0;
9409 if (IS_PPC64_TLS_RELOC (r_type))
9410 {
9411 if (h != NULL)
9412 tls_mask = h->tls_mask;
9413 else if (local_got_ents != NULL)
9414 {
9415 char *lgot_masks;
9416 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9417 tls_mask = lgot_masks[r_symndx];
9418 }
9419 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9420 {
9421 /* Check for toc tls entries. */
9422 char *toc_tls;
9423
9424 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9425 rel, input_bfd))
9426 return FALSE;
9427
9428 if (toc_tls)
9429 tls_mask = *toc_tls;
9430 }
9431 }
9432
9433 /* Check that tls relocs are used with tls syms, and non-tls
9434 relocs are used with non-tls syms. */
9435 if (r_symndx != 0
9436 && r_type != R_PPC64_NONE
9437 && (h == NULL
9438 || h->elf.root.type == bfd_link_hash_defined
9439 || h->elf.root.type == bfd_link_hash_defweak)
9440 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9441 {
9442 if (r_type == R_PPC64_TLS && tls_mask != 0)
9443 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9444 ;
9445 else
9446 (*_bfd_error_handler)
9447 (sym_type == STT_TLS
9448 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9449 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9450 input_bfd,
9451 input_section,
9452 (long) rel->r_offset,
9453 ppc64_elf_howto_table[r_type]->name,
9454 sym_name);
9455 }
9456
9457 /* Ensure reloc mapping code below stays sane. */
9458 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9459 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9460 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9461 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9462 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9463 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9464 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9465 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9466 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9467 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9468 abort ();
9469
9470 switch (r_type)
9471 {
9472 default:
9473 break;
9474
9475 case R_PPC64_TOC16:
9476 case R_PPC64_TOC16_LO:
9477 case R_PPC64_TOC16_DS:
9478 case R_PPC64_TOC16_LO_DS:
9479 {
9480 /* Check for toc tls entries. */
9481 char *toc_tls;
9482 int retval;
9483
9484 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9485 rel, input_bfd);
9486 if (retval == 0)
9487 return FALSE;
9488
9489 if (toc_tls)
9490 {
9491 tls_mask = *toc_tls;
9492 if (r_type == R_PPC64_TOC16_DS
9493 || r_type == R_PPC64_TOC16_LO_DS)
9494 {
9495 if (tls_mask != 0
9496 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9497 goto toctprel;
9498 }
9499 else
9500 {
9501 /* If we found a GD reloc pair, then we might be
9502 doing a GD->IE transition. */
9503 if (retval == 2)
9504 {
9505 tls_gd = TLS_TPRELGD;
9506 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9507 goto tls_get_addr_check;
9508 }
9509 else if (retval == 3)
9510 {
9511 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9512 goto tls_get_addr_check;
9513 }
9514 }
9515 }
9516 }
9517 break;
9518
9519 case R_PPC64_GOT_TPREL16_DS:
9520 case R_PPC64_GOT_TPREL16_LO_DS:
9521 if (tls_mask != 0
9522 && (tls_mask & TLS_TPREL) == 0)
9523 {
9524 toctprel:
9525 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9526 insn &= 31 << 21;
9527 insn |= 0x3c0d0000; /* addis 0,13,0 */
9528 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9529 r_type = R_PPC64_TPREL16_HA;
9530 if (toc_symndx != 0)
9531 {
9532 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9533 /* We changed the symbol. Start over in order to
9534 get h, sym, sec etc. right. */
9535 rel--;
9536 continue;
9537 }
9538 else
9539 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9540 }
9541 break;
9542
9543 case R_PPC64_TLS:
9544 if (tls_mask != 0
9545 && (tls_mask & TLS_TPREL) == 0)
9546 {
9547 bfd_vma rtra;
9548 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9549 if ((insn & ((0x3f << 26) | (31 << 11)))
9550 == ((31 << 26) | (13 << 11)))
9551 rtra = insn & ((1 << 26) - (1 << 16));
9552 else if ((insn & ((0x3f << 26) | (31 << 16)))
9553 == ((31 << 26) | (13 << 16)))
9554 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9555 else
9556 abort ();
9557 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9558 /* add -> addi. */
9559 insn = 14 << 26;
9560 else if ((insn & (31 << 1)) == 23 << 1
9561 && ((insn & (31 << 6)) < 14 << 6
9562 || ((insn & (31 << 6)) >= 16 << 6
9563 && (insn & (31 << 6)) < 24 << 6)))
9564 /* load and store indexed -> dform. */
9565 insn = (32 | ((insn >> 6) & 31)) << 26;
9566 else if ((insn & (31 << 1)) == 21 << 1
9567 && (insn & (0x1a << 6)) == 0)
9568 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9569 insn = (((58 | ((insn >> 6) & 4)) << 26)
9570 | ((insn >> 6) & 1));
9571 else if ((insn & (31 << 1)) == 21 << 1
9572 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9573 /* lwax -> lwa. */
9574 insn = (58 << 26) | 2;
9575 else
9576 abort ();
9577 insn |= rtra;
9578 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9579 /* Was PPC64_TLS which sits on insn boundary, now
9580 PPC64_TPREL16_LO which is at insn+2. */
9581 rel->r_offset += 2;
9582 r_type = R_PPC64_TPREL16_LO;
9583 if (toc_symndx != 0)
9584 {
9585 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9586 /* We changed the symbol. Start over in order to
9587 get h, sym, sec etc. right. */
9588 rel--;
9589 continue;
9590 }
9591 else
9592 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9593 }
9594 break;
9595
9596 case R_PPC64_GOT_TLSGD16_HI:
9597 case R_PPC64_GOT_TLSGD16_HA:
9598 tls_gd = TLS_TPRELGD;
9599 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9600 goto tls_gdld_hi;
9601 break;
9602
9603 case R_PPC64_GOT_TLSLD16_HI:
9604 case R_PPC64_GOT_TLSLD16_HA:
9605 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9606 {
9607 tls_gdld_hi:
9608 if ((tls_mask & tls_gd) != 0)
9609 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9610 + R_PPC64_GOT_TPREL16_DS);
9611 else
9612 {
9613 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9614 rel->r_offset -= 2;
9615 r_type = R_PPC64_NONE;
9616 }
9617 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9618 }
9619 break;
9620
9621 case R_PPC64_GOT_TLSGD16:
9622 case R_PPC64_GOT_TLSGD16_LO:
9623 tls_gd = TLS_TPRELGD;
9624 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9625 goto tls_get_addr_check;
9626 break;
9627
9628 case R_PPC64_GOT_TLSLD16:
9629 case R_PPC64_GOT_TLSLD16_LO:
9630 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9631 {
9632 tls_get_addr_check:
9633 if (rel + 1 < relend)
9634 {
9635 enum elf_ppc64_reloc_type r_type2;
9636 unsigned long r_symndx2;
9637 struct elf_link_hash_entry *h2;
9638 bfd_vma insn1, insn2, insn3;
9639 bfd_vma offset;
9640
9641 /* The next instruction should be a call to
9642 __tls_get_addr. Peek at the reloc to be sure. */
9643 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9644 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9645 if (r_symndx2 < symtab_hdr->sh_info
9646 || (r_type2 != R_PPC64_REL14
9647 && r_type2 != R_PPC64_REL14_BRTAKEN
9648 && r_type2 != R_PPC64_REL14_BRNTAKEN
9649 && r_type2 != R_PPC64_REL24))
9650 break;
9651
9652 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9653 while (h2->root.type == bfd_link_hash_indirect
9654 || h2->root.type == bfd_link_hash_warning)
9655 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9656 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9657 && h2 != &htab->tls_get_addr_fd->elf))
9658 break;
9659
9660 /* OK, it checks out. Replace the call. */
9661 offset = rel[1].r_offset;
9662 insn1 = bfd_get_32 (output_bfd,
9663 contents + rel->r_offset - 2);
9664 insn3 = bfd_get_32 (output_bfd,
9665 contents + offset + 4);
9666 if ((tls_mask & tls_gd) != 0)
9667 {
9668 /* IE */
9669 insn1 &= (1 << 26) - (1 << 2);
9670 insn1 |= 58 << 26; /* ld */
9671 insn2 = 0x7c636a14; /* add 3,3,13 */
9672 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9673 if ((tls_mask & TLS_EXPLICIT) == 0)
9674 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9675 + R_PPC64_GOT_TPREL16_DS);
9676 else
9677 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9678 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9679 }
9680 else
9681 {
9682 /* LE */
9683 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9684 insn2 = 0x38630000; /* addi 3,3,0 */
9685 if (tls_gd == 0)
9686 {
9687 /* Was an LD reloc. */
9688 r_symndx = 0;
9689 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9690 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9691 }
9692 else if (toc_symndx != 0)
9693 r_symndx = toc_symndx;
9694 r_type = R_PPC64_TPREL16_HA;
9695 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9696 rel[1].r_info = ELF64_R_INFO (r_symndx,
9697 R_PPC64_TPREL16_LO);
9698 rel[1].r_offset += 2;
9699 }
9700 if (insn3 == NOP
9701 || insn3 == CROR_151515 || insn3 == CROR_313131)
9702 {
9703 insn3 = insn2;
9704 insn2 = NOP;
9705 rel[1].r_offset += 4;
9706 }
9707 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9708 bfd_put_32 (output_bfd, insn2, contents + offset);
9709 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9710 if (tls_gd == 0 || toc_symndx != 0)
9711 {
9712 /* We changed the symbol. Start over in order
9713 to get h, sym, sec etc. right. */
9714 rel--;
9715 continue;
9716 }
9717 }
9718 }
9719 break;
9720
9721 case R_PPC64_DTPMOD64:
9722 if (rel + 1 < relend
9723 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9724 && rel[1].r_offset == rel->r_offset + 8)
9725 {
9726 if ((tls_mask & TLS_GD) == 0)
9727 {
9728 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9729 if ((tls_mask & TLS_TPRELGD) != 0)
9730 r_type = R_PPC64_TPREL64;
9731 else
9732 {
9733 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9734 r_type = R_PPC64_NONE;
9735 }
9736 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9737 }
9738 }
9739 else
9740 {
9741 if ((tls_mask & TLS_LD) == 0)
9742 {
9743 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9744 r_type = R_PPC64_NONE;
9745 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9746 }
9747 }
9748 break;
9749
9750 case R_PPC64_TPREL64:
9751 if ((tls_mask & TLS_TPREL) == 0)
9752 {
9753 r_type = R_PPC64_NONE;
9754 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9755 }
9756 break;
9757 }
9758
9759 /* Handle other relocations that tweak non-addend part of insn. */
9760 insn = 0;
9761 max_br_offset = 1 << 25;
9762 addend = rel->r_addend;
9763 switch (r_type)
9764 {
9765 default:
9766 break;
9767
9768 /* Branch taken prediction relocations. */
9769 case R_PPC64_ADDR14_BRTAKEN:
9770 case R_PPC64_REL14_BRTAKEN:
9771 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9772 /* Fall thru. */
9773
9774 /* Branch not taken prediction relocations. */
9775 case R_PPC64_ADDR14_BRNTAKEN:
9776 case R_PPC64_REL14_BRNTAKEN:
9777 insn |= bfd_get_32 (output_bfd,
9778 contents + rel->r_offset) & ~(0x01 << 21);
9779 /* Fall thru. */
9780
9781 case R_PPC64_REL14:
9782 max_br_offset = 1 << 15;
9783 /* Fall thru. */
9784
9785 case R_PPC64_REL24:
9786 /* Calls to functions with a different TOC, such as calls to
9787 shared objects, need to alter the TOC pointer. This is
9788 done using a linkage stub. A REL24 branching to these
9789 linkage stubs needs to be followed by a nop, as the nop
9790 will be replaced with an instruction to restore the TOC
9791 base pointer. */
9792 stub_entry = NULL;
9793 fdh = h;
9794 if (((h != NULL
9795 && (((fdh = h->oh) != NULL
9796 && fdh->elf.plt.plist != NULL)
9797 || (fdh = h)->elf.plt.plist != NULL))
9798 || (sec != NULL
9799 && sec->output_section != NULL
9800 && sec->id <= htab->top_id
9801 && (htab->stub_group[sec->id].toc_off
9802 != htab->stub_group[input_section->id].toc_off)))
9803 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9804 rel, htab)) != NULL
9805 && (stub_entry->stub_type == ppc_stub_plt_call
9806 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9807 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9808 {
9809 bfd_boolean can_plt_call = FALSE;
9810
9811 if (rel->r_offset + 8 <= input_section->size)
9812 {
9813 unsigned long nop;
9814 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9815 if (nop == NOP
9816 || nop == CROR_151515 || nop == CROR_313131)
9817 {
9818 bfd_put_32 (input_bfd, LD_R2_40R1,
9819 contents + rel->r_offset + 4);
9820 can_plt_call = TRUE;
9821 }
9822 }
9823
9824 if (!can_plt_call)
9825 {
9826 if (stub_entry->stub_type == ppc_stub_plt_call)
9827 {
9828 /* If this is a plain branch rather than a branch
9829 and link, don't require a nop. */
9830 unsigned long br;
9831 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9832 if ((br & 1) == 0)
9833 can_plt_call = TRUE;
9834 }
9835 else if (h != NULL
9836 && strcmp (h->elf.root.root.string,
9837 ".__libc_start_main") == 0)
9838 {
9839 /* Allow crt1 branch to go via a toc adjusting stub. */
9840 can_plt_call = TRUE;
9841 }
9842 else
9843 {
9844 if (strcmp (input_section->output_section->name,
9845 ".init") == 0
9846 || strcmp (input_section->output_section->name,
9847 ".fini") == 0)
9848 (*_bfd_error_handler)
9849 (_("%B(%A+0x%lx): automatic multiple TOCs "
9850 "not supported using your crt files; "
9851 "recompile with -mminimal-toc or upgrade gcc"),
9852 input_bfd,
9853 input_section,
9854 (long) rel->r_offset);
9855 else
9856 (*_bfd_error_handler)
9857 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9858 "does not allow automatic multiple TOCs; "
9859 "recompile with -mminimal-toc or "
9860 "-fno-optimize-sibling-calls, "
9861 "or make `%s' extern"),
9862 input_bfd,
9863 input_section,
9864 (long) rel->r_offset,
9865 sym_name,
9866 sym_name);
9867 bfd_set_error (bfd_error_bad_value);
9868 ret = FALSE;
9869 }
9870 }
9871
9872 if (can_plt_call
9873 && stub_entry->stub_type == ppc_stub_plt_call)
9874 unresolved_reloc = FALSE;
9875 }
9876
9877 if (stub_entry == NULL
9878 && get_opd_info (sec) != NULL)
9879 {
9880 /* The branch destination is the value of the opd entry. */
9881 bfd_vma off = (relocation - sec->output_section->vma
9882 - sec->output_offset + rel->r_addend);
9883 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9884 if (dest != (bfd_vma) -1)
9885 {
9886 relocation = dest;
9887 addend = 0;
9888 }
9889 }
9890
9891 /* If the branch is out of reach we ought to have a long
9892 branch stub. */
9893 from = (rel->r_offset
9894 + input_section->output_offset
9895 + input_section->output_section->vma);
9896
9897 if (stub_entry == NULL
9898 && (relocation + rel->r_addend - from + max_br_offset
9899 >= 2 * max_br_offset)
9900 && r_type != R_PPC64_ADDR14_BRTAKEN
9901 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9902 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9903 htab);
9904
9905 if (stub_entry != NULL)
9906 {
9907 /* Munge up the value and addend so that we call the stub
9908 rather than the procedure directly. */
9909 relocation = (stub_entry->stub_offset
9910 + stub_entry->stub_sec->output_offset
9911 + stub_entry->stub_sec->output_section->vma);
9912 addend = 0;
9913 }
9914
9915 if (insn != 0)
9916 {
9917 if (is_power4)
9918 {
9919 /* Set 'a' bit. This is 0b00010 in BO field for branch
9920 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9921 for branch on CTR insns (BO == 1a00t or 1a01t). */
9922 if ((insn & (0x14 << 21)) == (0x04 << 21))
9923 insn |= 0x02 << 21;
9924 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9925 insn |= 0x08 << 21;
9926 else
9927 break;
9928 }
9929 else
9930 {
9931 /* Invert 'y' bit if not the default. */
9932 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9933 insn ^= 0x01 << 21;
9934 }
9935
9936 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9937 }
9938
9939 /* NOP out calls to undefined weak functions.
9940 We can thus call a weak function without first
9941 checking whether the function is defined. */
9942 else if (h != NULL
9943 && h->elf.root.type == bfd_link_hash_undefweak
9944 && r_type == R_PPC64_REL24
9945 && relocation == 0
9946 && rel->r_addend == 0)
9947 {
9948 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9949 continue;
9950 }
9951 break;
9952 }
9953
9954 /* Set `addend'. */
9955 tls_type = 0;
9956 switch (r_type)
9957 {
9958 default:
9959 (*_bfd_error_handler)
9960 (_("%B: unknown relocation type %d for symbol %s"),
9961 input_bfd, (int) r_type, sym_name);
9962
9963 bfd_set_error (bfd_error_bad_value);
9964 ret = FALSE;
9965 continue;
9966
9967 case R_PPC64_NONE:
9968 case R_PPC64_TLS:
9969 case R_PPC64_GNU_VTINHERIT:
9970 case R_PPC64_GNU_VTENTRY:
9971 continue;
9972
9973 /* GOT16 relocations. Like an ADDR16 using the symbol's
9974 address in the GOT as relocation value instead of the
9975 symbol's value itself. Also, create a GOT entry for the
9976 symbol and put the symbol value there. */
9977 case R_PPC64_GOT_TLSGD16:
9978 case R_PPC64_GOT_TLSGD16_LO:
9979 case R_PPC64_GOT_TLSGD16_HI:
9980 case R_PPC64_GOT_TLSGD16_HA:
9981 tls_type = TLS_TLS | TLS_GD;
9982 goto dogot;
9983
9984 case R_PPC64_GOT_TLSLD16:
9985 case R_PPC64_GOT_TLSLD16_LO:
9986 case R_PPC64_GOT_TLSLD16_HI:
9987 case R_PPC64_GOT_TLSLD16_HA:
9988 tls_type = TLS_TLS | TLS_LD;
9989 goto dogot;
9990
9991 case R_PPC64_GOT_TPREL16_DS:
9992 case R_PPC64_GOT_TPREL16_LO_DS:
9993 case R_PPC64_GOT_TPREL16_HI:
9994 case R_PPC64_GOT_TPREL16_HA:
9995 tls_type = TLS_TLS | TLS_TPREL;
9996 goto dogot;
9997
9998 case R_PPC64_GOT_DTPREL16_DS:
9999 case R_PPC64_GOT_DTPREL16_LO_DS:
10000 case R_PPC64_GOT_DTPREL16_HI:
10001 case R_PPC64_GOT_DTPREL16_HA:
10002 tls_type = TLS_TLS | TLS_DTPREL;
10003 goto dogot;
10004
10005 case R_PPC64_GOT16:
10006 case R_PPC64_GOT16_LO:
10007 case R_PPC64_GOT16_HI:
10008 case R_PPC64_GOT16_HA:
10009 case R_PPC64_GOT16_DS:
10010 case R_PPC64_GOT16_LO_DS:
10011 dogot:
10012 {
10013 /* Relocation is to the entry for this symbol in the global
10014 offset table. */
10015 asection *got;
10016 bfd_vma *offp;
10017 bfd_vma off;
10018 unsigned long indx = 0;
10019
10020 if (tls_type == (TLS_TLS | TLS_LD)
10021 && (h == NULL
10022 || !h->elf.def_dynamic))
10023 offp = &ppc64_tlsld_got (input_bfd)->offset;
10024 else
10025 {
10026 struct got_entry *ent;
10027
10028 if (h != NULL)
10029 {
10030 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10031 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10032 &h->elf)
10033 || (info->shared
10034 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10035 /* This is actually a static link, or it is a
10036 -Bsymbolic link and the symbol is defined
10037 locally, or the symbol was forced to be local
10038 because of a version file. */
10039 ;
10040 else
10041 {
10042 indx = h->elf.dynindx;
10043 unresolved_reloc = FALSE;
10044 }
10045 ent = h->elf.got.glist;
10046 }
10047 else
10048 {
10049 if (local_got_ents == NULL)
10050 abort ();
10051 ent = local_got_ents[r_symndx];
10052 }
10053
10054 for (; ent != NULL; ent = ent->next)
10055 if (ent->addend == rel->r_addend
10056 && ent->owner == input_bfd
10057 && ent->tls_type == tls_type)
10058 break;
10059 if (ent == NULL)
10060 abort ();
10061 offp = &ent->got.offset;
10062 }
10063
10064 got = ppc64_elf_tdata (input_bfd)->got;
10065 if (got == NULL)
10066 abort ();
10067
10068 /* The offset must always be a multiple of 8. We use the
10069 least significant bit to record whether we have already
10070 processed this entry. */
10071 off = *offp;
10072 if ((off & 1) != 0)
10073 off &= ~1;
10074 else
10075 {
10076 /* Generate relocs for the dynamic linker, except in
10077 the case of TLSLD where we'll use one entry per
10078 module. */
10079 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10080
10081 *offp = off | 1;
10082 if ((info->shared || indx != 0)
10083 && (h == NULL
10084 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10085 || h->elf.root.type != bfd_link_hash_undefweak))
10086 {
10087 outrel.r_offset = (got->output_section->vma
10088 + got->output_offset
10089 + off);
10090 outrel.r_addend = rel->r_addend;
10091 if (tls_type & (TLS_LD | TLS_GD))
10092 {
10093 outrel.r_addend = 0;
10094 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10095 if (tls_type == (TLS_TLS | TLS_GD))
10096 {
10097 loc = relgot->contents;
10098 loc += (relgot->reloc_count++
10099 * sizeof (Elf64_External_Rela));
10100 bfd_elf64_swap_reloca_out (output_bfd,
10101 &outrel, loc);
10102 outrel.r_offset += 8;
10103 outrel.r_addend = rel->r_addend;
10104 outrel.r_info
10105 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10106 }
10107 }
10108 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10109 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10110 else if (tls_type == (TLS_TLS | TLS_TPREL))
10111 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10112 else if (indx == 0)
10113 {
10114 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10115
10116 /* Write the .got section contents for the sake
10117 of prelink. */
10118 loc = got->contents + off;
10119 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10120 loc);
10121 }
10122 else
10123 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10124
10125 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10126 {
10127 outrel.r_addend += relocation;
10128 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10129 outrel.r_addend -= htab->elf.tls_sec->vma;
10130 }
10131 loc = relgot->contents;
10132 loc += (relgot->reloc_count++
10133 * sizeof (Elf64_External_Rela));
10134 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10135 }
10136
10137 /* Init the .got section contents here if we're not
10138 emitting a reloc. */
10139 else
10140 {
10141 relocation += rel->r_addend;
10142 if (tls_type == (TLS_TLS | TLS_LD))
10143 relocation = 1;
10144 else if (tls_type != 0)
10145 {
10146 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10147 if (tls_type == (TLS_TLS | TLS_TPREL))
10148 relocation += DTP_OFFSET - TP_OFFSET;
10149
10150 if (tls_type == (TLS_TLS | TLS_GD))
10151 {
10152 bfd_put_64 (output_bfd, relocation,
10153 got->contents + off + 8);
10154 relocation = 1;
10155 }
10156 }
10157
10158 bfd_put_64 (output_bfd, relocation,
10159 got->contents + off);
10160 }
10161 }
10162
10163 if (off >= (bfd_vma) -2)
10164 abort ();
10165
10166 relocation = got->output_offset + off;
10167
10168 /* TOC base (r2) is TOC start plus 0x8000. */
10169 addend = -TOC_BASE_OFF;
10170 }
10171 break;
10172
10173 case R_PPC64_PLT16_HA:
10174 case R_PPC64_PLT16_HI:
10175 case R_PPC64_PLT16_LO:
10176 case R_PPC64_PLT32:
10177 case R_PPC64_PLT64:
10178 /* Relocation is to the entry for this symbol in the
10179 procedure linkage table. */
10180
10181 /* Resolve a PLT reloc against a local symbol directly,
10182 without using the procedure linkage table. */
10183 if (h == NULL)
10184 break;
10185
10186 /* It's possible that we didn't make a PLT entry for this
10187 symbol. This happens when statically linking PIC code,
10188 or when using -Bsymbolic. Go find a match if there is a
10189 PLT entry. */
10190 if (htab->plt != NULL)
10191 {
10192 struct plt_entry *ent;
10193 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10194 if (ent->addend == rel->r_addend
10195 && ent->plt.offset != (bfd_vma) -1)
10196 {
10197 relocation = (htab->plt->output_section->vma
10198 + htab->plt->output_offset
10199 + ent->plt.offset);
10200 unresolved_reloc = FALSE;
10201 }
10202 }
10203 break;
10204
10205 case R_PPC64_TOC:
10206 /* Relocation value is TOC base. */
10207 relocation = TOCstart;
10208 if (r_symndx == 0)
10209 relocation += htab->stub_group[input_section->id].toc_off;
10210 else if (unresolved_reloc)
10211 ;
10212 else if (sec != NULL && sec->id <= htab->top_id)
10213 relocation += htab->stub_group[sec->id].toc_off;
10214 else
10215 unresolved_reloc = TRUE;
10216 goto dodyn2;
10217
10218 /* TOC16 relocs. We want the offset relative to the TOC base,
10219 which is the address of the start of the TOC plus 0x8000.
10220 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10221 in this order. */
10222 case R_PPC64_TOC16:
10223 case R_PPC64_TOC16_LO:
10224 case R_PPC64_TOC16_HI:
10225 case R_PPC64_TOC16_DS:
10226 case R_PPC64_TOC16_LO_DS:
10227 case R_PPC64_TOC16_HA:
10228 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10229 break;
10230
10231 /* Relocate against the beginning of the section. */
10232 case R_PPC64_SECTOFF:
10233 case R_PPC64_SECTOFF_LO:
10234 case R_PPC64_SECTOFF_HI:
10235 case R_PPC64_SECTOFF_DS:
10236 case R_PPC64_SECTOFF_LO_DS:
10237 case R_PPC64_SECTOFF_HA:
10238 if (sec != NULL)
10239 addend -= sec->output_section->vma;
10240 break;
10241
10242 case R_PPC64_REL14:
10243 case R_PPC64_REL14_BRNTAKEN:
10244 case R_PPC64_REL14_BRTAKEN:
10245 case R_PPC64_REL24:
10246 break;
10247
10248 case R_PPC64_TPREL16:
10249 case R_PPC64_TPREL16_LO:
10250 case R_PPC64_TPREL16_HI:
10251 case R_PPC64_TPREL16_HA:
10252 case R_PPC64_TPREL16_DS:
10253 case R_PPC64_TPREL16_LO_DS:
10254 case R_PPC64_TPREL16_HIGHER:
10255 case R_PPC64_TPREL16_HIGHERA:
10256 case R_PPC64_TPREL16_HIGHEST:
10257 case R_PPC64_TPREL16_HIGHESTA:
10258 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10259 if (info->shared)
10260 /* The TPREL16 relocs shouldn't really be used in shared
10261 libs as they will result in DT_TEXTREL being set, but
10262 support them anyway. */
10263 goto dodyn;
10264 break;
10265
10266 case R_PPC64_DTPREL16:
10267 case R_PPC64_DTPREL16_LO:
10268 case R_PPC64_DTPREL16_HI:
10269 case R_PPC64_DTPREL16_HA:
10270 case R_PPC64_DTPREL16_DS:
10271 case R_PPC64_DTPREL16_LO_DS:
10272 case R_PPC64_DTPREL16_HIGHER:
10273 case R_PPC64_DTPREL16_HIGHERA:
10274 case R_PPC64_DTPREL16_HIGHEST:
10275 case R_PPC64_DTPREL16_HIGHESTA:
10276 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10277 break;
10278
10279 case R_PPC64_DTPMOD64:
10280 relocation = 1;
10281 addend = 0;
10282 goto dodyn;
10283
10284 case R_PPC64_TPREL64:
10285 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10286 goto dodyn;
10287
10288 case R_PPC64_DTPREL64:
10289 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10290 /* Fall thru */
10291
10292 /* Relocations that may need to be propagated if this is a
10293 dynamic object. */
10294 case R_PPC64_REL30:
10295 case R_PPC64_REL32:
10296 case R_PPC64_REL64:
10297 case R_PPC64_ADDR14:
10298 case R_PPC64_ADDR14_BRNTAKEN:
10299 case R_PPC64_ADDR14_BRTAKEN:
10300 case R_PPC64_ADDR16:
10301 case R_PPC64_ADDR16_DS:
10302 case R_PPC64_ADDR16_HA:
10303 case R_PPC64_ADDR16_HI:
10304 case R_PPC64_ADDR16_HIGHER:
10305 case R_PPC64_ADDR16_HIGHERA:
10306 case R_PPC64_ADDR16_HIGHEST:
10307 case R_PPC64_ADDR16_HIGHESTA:
10308 case R_PPC64_ADDR16_LO:
10309 case R_PPC64_ADDR16_LO_DS:
10310 case R_PPC64_ADDR24:
10311 case R_PPC64_ADDR32:
10312 case R_PPC64_ADDR64:
10313 case R_PPC64_UADDR16:
10314 case R_PPC64_UADDR32:
10315 case R_PPC64_UADDR64:
10316 /* r_symndx will be zero only for relocs against symbols
10317 from removed linkonce sections, or sections discarded by
10318 a linker script. */
10319 dodyn:
10320 if (r_symndx == 0)
10321 break;
10322 /* Fall thru. */
10323
10324 dodyn2:
10325 if ((input_section->flags & SEC_ALLOC) == 0)
10326 break;
10327
10328 if (NO_OPD_RELOCS && is_opd)
10329 break;
10330
10331 if ((info->shared
10332 && (h == NULL
10333 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10334 || h->elf.root.type != bfd_link_hash_undefweak)
10335 && (MUST_BE_DYN_RELOC (r_type)
10336 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10337 || (ELIMINATE_COPY_RELOCS
10338 && !info->shared
10339 && h != NULL
10340 && h->elf.dynindx != -1
10341 && !h->elf.non_got_ref
10342 && h->elf.def_dynamic
10343 && !h->elf.def_regular))
10344 {
10345 Elf_Internal_Rela outrel;
10346 bfd_boolean skip, relocate;
10347 asection *sreloc;
10348 bfd_byte *loc;
10349 bfd_vma out_off;
10350
10351 /* When generating a dynamic object, these relocations
10352 are copied into the output file to be resolved at run
10353 time. */
10354
10355 skip = FALSE;
10356 relocate = FALSE;
10357
10358 out_off = _bfd_elf_section_offset (output_bfd, info,
10359 input_section, rel->r_offset);
10360 if (out_off == (bfd_vma) -1)
10361 skip = TRUE;
10362 else if (out_off == (bfd_vma) -2)
10363 skip = TRUE, relocate = TRUE;
10364 out_off += (input_section->output_section->vma
10365 + input_section->output_offset);
10366 outrel.r_offset = out_off;
10367 outrel.r_addend = rel->r_addend;
10368
10369 /* Optimize unaligned reloc use. */
10370 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10371 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10372 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10373 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10374 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10375 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10376 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10377 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10378 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10379
10380 if (skip)
10381 memset (&outrel, 0, sizeof outrel);
10382 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10383 && !is_opd
10384 && r_type != R_PPC64_TOC)
10385 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10386 else
10387 {
10388 /* This symbol is local, or marked to become local,
10389 or this is an opd section reloc which must point
10390 at a local function. */
10391 outrel.r_addend += relocation;
10392 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10393 {
10394 if (is_opd && h != NULL)
10395 {
10396 /* Lie about opd entries. This case occurs
10397 when building shared libraries and we
10398 reference a function in another shared
10399 lib. The same thing happens for a weak
10400 definition in an application that's
10401 overridden by a strong definition in a
10402 shared lib. (I believe this is a generic
10403 bug in binutils handling of weak syms.)
10404 In these cases we won't use the opd
10405 entry in this lib. */
10406 unresolved_reloc = FALSE;
10407 }
10408 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10409
10410 /* We need to relocate .opd contents for ld.so.
10411 Prelink also wants simple and consistent rules
10412 for relocs. This make all RELATIVE relocs have
10413 *r_offset equal to r_addend. */
10414 relocate = TRUE;
10415 }
10416 else
10417 {
10418 long indx = 0;
10419
10420 if (bfd_is_abs_section (sec))
10421 ;
10422 else if (sec == NULL || sec->owner == NULL)
10423 {
10424 bfd_set_error (bfd_error_bad_value);
10425 return FALSE;
10426 }
10427 else
10428 {
10429 asection *osec;
10430
10431 osec = sec->output_section;
10432 indx = elf_section_data (osec)->dynindx;
10433
10434 /* We are turning this relocation into one
10435 against a section symbol, so subtract out
10436 the output section's address but not the
10437 offset of the input section in the output
10438 section. */
10439 outrel.r_addend -= osec->vma;
10440 }
10441
10442 outrel.r_info = ELF64_R_INFO (indx, r_type);
10443 }
10444 }
10445
10446 sreloc = elf_section_data (input_section)->sreloc;
10447 if (sreloc == NULL)
10448 abort ();
10449
10450 loc = sreloc->contents;
10451 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10452 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10453
10454 /* If this reloc is against an external symbol, it will
10455 be computed at runtime, so there's no need to do
10456 anything now. However, for the sake of prelink ensure
10457 that the section contents are a known value. */
10458 if (! relocate)
10459 {
10460 unresolved_reloc = FALSE;
10461 /* The value chosen here is quite arbitrary as ld.so
10462 ignores section contents except for the special
10463 case of .opd where the contents might be accessed
10464 before relocation. Choose zero, as that won't
10465 cause reloc overflow. */
10466 relocation = 0;
10467 addend = 0;
10468 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10469 to improve backward compatibility with older
10470 versions of ld. */
10471 if (r_type == R_PPC64_ADDR64)
10472 addend = outrel.r_addend;
10473 /* Adjust pc_relative relocs to have zero in *r_offset. */
10474 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10475 addend = (input_section->output_section->vma
10476 + input_section->output_offset
10477 + rel->r_offset);
10478 }
10479 }
10480 break;
10481
10482 case R_PPC64_COPY:
10483 case R_PPC64_GLOB_DAT:
10484 case R_PPC64_JMP_SLOT:
10485 case R_PPC64_RELATIVE:
10486 /* We shouldn't ever see these dynamic relocs in relocatable
10487 files. */
10488 /* Fall through. */
10489
10490 case R_PPC64_PLTGOT16:
10491 case R_PPC64_PLTGOT16_DS:
10492 case R_PPC64_PLTGOT16_HA:
10493 case R_PPC64_PLTGOT16_HI:
10494 case R_PPC64_PLTGOT16_LO:
10495 case R_PPC64_PLTGOT16_LO_DS:
10496 case R_PPC64_PLTREL32:
10497 case R_PPC64_PLTREL64:
10498 /* These ones haven't been implemented yet. */
10499
10500 (*_bfd_error_handler)
10501 (_("%B: relocation %s is not supported for symbol %s."),
10502 input_bfd,
10503 ppc64_elf_howto_table[r_type]->name, sym_name);
10504
10505 bfd_set_error (bfd_error_invalid_operation);
10506 ret = FALSE;
10507 continue;
10508 }
10509
10510 /* Do any further special processing. */
10511 switch (r_type)
10512 {
10513 default:
10514 break;
10515
10516 case R_PPC64_ADDR16_HA:
10517 case R_PPC64_ADDR16_HIGHERA:
10518 case R_PPC64_ADDR16_HIGHESTA:
10519 case R_PPC64_GOT16_HA:
10520 case R_PPC64_PLTGOT16_HA:
10521 case R_PPC64_PLT16_HA:
10522 case R_PPC64_TOC16_HA:
10523 case R_PPC64_SECTOFF_HA:
10524 case R_PPC64_TPREL16_HA:
10525 case R_PPC64_DTPREL16_HA:
10526 case R_PPC64_GOT_TLSGD16_HA:
10527 case R_PPC64_GOT_TLSLD16_HA:
10528 case R_PPC64_GOT_TPREL16_HA:
10529 case R_PPC64_GOT_DTPREL16_HA:
10530 case R_PPC64_TPREL16_HIGHER:
10531 case R_PPC64_TPREL16_HIGHERA:
10532 case R_PPC64_TPREL16_HIGHEST:
10533 case R_PPC64_TPREL16_HIGHESTA:
10534 case R_PPC64_DTPREL16_HIGHER:
10535 case R_PPC64_DTPREL16_HIGHERA:
10536 case R_PPC64_DTPREL16_HIGHEST:
10537 case R_PPC64_DTPREL16_HIGHESTA:
10538 /* It's just possible that this symbol is a weak symbol
10539 that's not actually defined anywhere. In that case,
10540 'sec' would be NULL, and we should leave the symbol
10541 alone (it will be set to zero elsewhere in the link). */
10542 if (sec != NULL)
10543 /* Add 0x10000 if sign bit in 0:15 is set.
10544 Bits 0:15 are not used. */
10545 addend += 0x8000;
10546 break;
10547
10548 case R_PPC64_ADDR16_DS:
10549 case R_PPC64_ADDR16_LO_DS:
10550 case R_PPC64_GOT16_DS:
10551 case R_PPC64_GOT16_LO_DS:
10552 case R_PPC64_PLT16_LO_DS:
10553 case R_PPC64_SECTOFF_DS:
10554 case R_PPC64_SECTOFF_LO_DS:
10555 case R_PPC64_TOC16_DS:
10556 case R_PPC64_TOC16_LO_DS:
10557 case R_PPC64_PLTGOT16_DS:
10558 case R_PPC64_PLTGOT16_LO_DS:
10559 case R_PPC64_GOT_TPREL16_DS:
10560 case R_PPC64_GOT_TPREL16_LO_DS:
10561 case R_PPC64_GOT_DTPREL16_DS:
10562 case R_PPC64_GOT_DTPREL16_LO_DS:
10563 case R_PPC64_TPREL16_DS:
10564 case R_PPC64_TPREL16_LO_DS:
10565 case R_PPC64_DTPREL16_DS:
10566 case R_PPC64_DTPREL16_LO_DS:
10567 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10568 mask = 3;
10569 /* If this reloc is against an lq insn, then the value must be
10570 a multiple of 16. This is somewhat of a hack, but the
10571 "correct" way to do this by defining _DQ forms of all the
10572 _DS relocs bloats all reloc switches in this file. It
10573 doesn't seem to make much sense to use any of these relocs
10574 in data, so testing the insn should be safe. */
10575 if ((insn & (0x3f << 26)) == (56u << 26))
10576 mask = 15;
10577 if (((relocation + addend) & mask) != 0)
10578 {
10579 (*_bfd_error_handler)
10580 (_("%B: error: relocation %s not a multiple of %d"),
10581 input_bfd,
10582 ppc64_elf_howto_table[r_type]->name,
10583 mask + 1);
10584 bfd_set_error (bfd_error_bad_value);
10585 ret = FALSE;
10586 continue;
10587 }
10588 break;
10589 }
10590
10591 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10592 because such sections are not SEC_ALLOC and thus ld.so will
10593 not process them. */
10594 if (unresolved_reloc
10595 && !((input_section->flags & SEC_DEBUGGING) != 0
10596 && h->elf.def_dynamic))
10597 {
10598 (*_bfd_error_handler)
10599 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10600 input_bfd,
10601 input_section,
10602 (long) rel->r_offset,
10603 ppc64_elf_howto_table[(int) r_type]->name,
10604 h->elf.root.root.string);
10605 ret = FALSE;
10606 }
10607
10608 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10609 input_bfd,
10610 input_section,
10611 contents,
10612 rel->r_offset,
10613 relocation,
10614 addend);
10615
10616 if (r != bfd_reloc_ok)
10617 {
10618 if (sym_name == NULL)
10619 sym_name = "(null)";
10620 if (r == bfd_reloc_overflow)
10621 {
10622 if (warned)
10623 continue;
10624 if (h != NULL
10625 && h->elf.root.type == bfd_link_hash_undefweak
10626 && ppc64_elf_howto_table[r_type]->pc_relative)
10627 {
10628 /* Assume this is a call protected by other code that
10629 detects the symbol is undefined. If this is the case,
10630 we can safely ignore the overflow. If not, the
10631 program is hosed anyway, and a little warning isn't
10632 going to help. */
10633
10634 continue;
10635 }
10636
10637 if (!((*info->callbacks->reloc_overflow)
10638 (info, (h ? &h->elf.root : NULL), sym_name,
10639 ppc64_elf_howto_table[r_type]->name,
10640 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10641 return FALSE;
10642 }
10643 else
10644 {
10645 (*_bfd_error_handler)
10646 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10647 input_bfd,
10648 input_section,
10649 (long) rel->r_offset,
10650 ppc64_elf_howto_table[r_type]->name,
10651 sym_name,
10652 (int) r);
10653 ret = FALSE;
10654 }
10655 }
10656 }
10657
10658 /* If we're emitting relocations, then shortly after this function
10659 returns, reloc offsets and addends for this section will be
10660 adjusted. Worse, reloc symbol indices will be for the output
10661 file rather than the input. Save a copy of the relocs for
10662 opd_entry_value. */
10663 if (is_opd && info->emitrelocations)
10664 {
10665 bfd_size_type amt;
10666 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10667 rel = bfd_alloc (input_bfd, amt);
10668 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10669 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10670 if (rel == NULL)
10671 return FALSE;
10672 memcpy (rel, relocs, amt);
10673 }
10674 return ret;
10675 }
10676
10677 /* Adjust the value of any local symbols in opd sections. */
10678
10679 static bfd_boolean
10680 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10681 const char *name ATTRIBUTE_UNUSED,
10682 Elf_Internal_Sym *elfsym,
10683 asection *input_sec,
10684 struct elf_link_hash_entry *h)
10685 {
10686 long *opd_adjust, adjust;
10687 bfd_vma value;
10688
10689 if (h != NULL)
10690 return TRUE;
10691
10692 opd_adjust = get_opd_info (input_sec);
10693 if (opd_adjust == NULL)
10694 return TRUE;
10695
10696 value = elfsym->st_value - input_sec->output_offset;
10697 if (!info->relocatable)
10698 value -= input_sec->output_section->vma;
10699
10700 adjust = opd_adjust[value / 8];
10701 if (adjust == -1)
10702 elfsym->st_value = 0;
10703 else
10704 elfsym->st_value += adjust;
10705 return TRUE;
10706 }
10707
10708 /* Finish up dynamic symbol handling. We set the contents of various
10709 dynamic sections here. */
10710
10711 static bfd_boolean
10712 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10713 struct bfd_link_info *info,
10714 struct elf_link_hash_entry *h,
10715 Elf_Internal_Sym *sym)
10716 {
10717 struct ppc_link_hash_table *htab;
10718 bfd *dynobj;
10719 struct plt_entry *ent;
10720 Elf_Internal_Rela rela;
10721 bfd_byte *loc;
10722
10723 htab = ppc_hash_table (info);
10724 dynobj = htab->elf.dynobj;
10725
10726 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10727 if (ent->plt.offset != (bfd_vma) -1)
10728 {
10729 /* This symbol has an entry in the procedure linkage
10730 table. Set it up. */
10731
10732 if (htab->plt == NULL
10733 || htab->relplt == NULL
10734 || htab->glink == NULL)
10735 abort ();
10736
10737 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10738 fill in the PLT entry. */
10739 rela.r_offset = (htab->plt->output_section->vma
10740 + htab->plt->output_offset
10741 + ent->plt.offset);
10742 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10743 rela.r_addend = ent->addend;
10744
10745 loc = htab->relplt->contents;
10746 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10747 * sizeof (Elf64_External_Rela));
10748 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10749 }
10750
10751 if (h->needs_copy)
10752 {
10753 Elf_Internal_Rela rela;
10754 bfd_byte *loc;
10755
10756 /* This symbol needs a copy reloc. Set it up. */
10757
10758 if (h->dynindx == -1
10759 || (h->root.type != bfd_link_hash_defined
10760 && h->root.type != bfd_link_hash_defweak)
10761 || htab->relbss == NULL)
10762 abort ();
10763
10764 rela.r_offset = (h->root.u.def.value
10765 + h->root.u.def.section->output_section->vma
10766 + h->root.u.def.section->output_offset);
10767 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10768 rela.r_addend = 0;
10769 loc = htab->relbss->contents;
10770 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10771 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10772 }
10773
10774 /* Mark some specially defined symbols as absolute. */
10775 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10776 sym->st_shndx = SHN_ABS;
10777
10778 return TRUE;
10779 }
10780
10781 /* Used to decide how to sort relocs in an optimal manner for the
10782 dynamic linker, before writing them out. */
10783
10784 static enum elf_reloc_type_class
10785 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10786 {
10787 enum elf_ppc64_reloc_type r_type;
10788
10789 r_type = ELF64_R_TYPE (rela->r_info);
10790 switch (r_type)
10791 {
10792 case R_PPC64_RELATIVE:
10793 return reloc_class_relative;
10794 case R_PPC64_JMP_SLOT:
10795 return reloc_class_plt;
10796 case R_PPC64_COPY:
10797 return reloc_class_copy;
10798 default:
10799 return reloc_class_normal;
10800 }
10801 }
10802
10803 /* Finish up the dynamic sections. */
10804
10805 static bfd_boolean
10806 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10807 struct bfd_link_info *info)
10808 {
10809 struct ppc_link_hash_table *htab;
10810 bfd *dynobj;
10811 asection *sdyn;
10812
10813 htab = ppc_hash_table (info);
10814 dynobj = htab->elf.dynobj;
10815 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10816
10817 if (htab->elf.dynamic_sections_created)
10818 {
10819 Elf64_External_Dyn *dyncon, *dynconend;
10820
10821 if (sdyn == NULL || htab->got == NULL)
10822 abort ();
10823
10824 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10825 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10826 for (; dyncon < dynconend; dyncon++)
10827 {
10828 Elf_Internal_Dyn dyn;
10829 asection *s;
10830
10831 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10832
10833 switch (dyn.d_tag)
10834 {
10835 default:
10836 continue;
10837
10838 case DT_PPC64_GLINK:
10839 s = htab->glink;
10840 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10841 /* We stupidly defined DT_PPC64_GLINK to be the start
10842 of glink rather than the first entry point, which is
10843 what ld.so needs, and now have a bigger stub to
10844 support automatic multiple TOCs. */
10845 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10846 break;
10847
10848 case DT_PPC64_OPD:
10849 s = bfd_get_section_by_name (output_bfd, ".opd");
10850 if (s == NULL)
10851 continue;
10852 dyn.d_un.d_ptr = s->vma;
10853 break;
10854
10855 case DT_PPC64_OPDSZ:
10856 s = bfd_get_section_by_name (output_bfd, ".opd");
10857 if (s == NULL)
10858 continue;
10859 dyn.d_un.d_val = s->size;
10860 break;
10861
10862 case DT_PLTGOT:
10863 s = htab->plt;
10864 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10865 break;
10866
10867 case DT_JMPREL:
10868 s = htab->relplt;
10869 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10870 break;
10871
10872 case DT_PLTRELSZ:
10873 dyn.d_un.d_val = htab->relplt->size;
10874 break;
10875
10876 case DT_RELASZ:
10877 /* Don't count procedure linkage table relocs in the
10878 overall reloc count. */
10879 s = htab->relplt;
10880 if (s == NULL)
10881 continue;
10882 dyn.d_un.d_val -= s->size;
10883 break;
10884
10885 case DT_RELA:
10886 /* We may not be using the standard ELF linker script.
10887 If .rela.plt is the first .rela section, we adjust
10888 DT_RELA to not include it. */
10889 s = htab->relplt;
10890 if (s == NULL)
10891 continue;
10892 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10893 continue;
10894 dyn.d_un.d_ptr += s->size;
10895 break;
10896 }
10897
10898 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10899 }
10900 }
10901
10902 if (htab->got != NULL && htab->got->size != 0)
10903 {
10904 /* Fill in the first entry in the global offset table.
10905 We use it to hold the link-time TOCbase. */
10906 bfd_put_64 (output_bfd,
10907 elf_gp (output_bfd) + TOC_BASE_OFF,
10908 htab->got->contents);
10909
10910 /* Set .got entry size. */
10911 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10912 }
10913
10914 if (htab->plt != NULL && htab->plt->size != 0)
10915 {
10916 /* Set .plt entry size. */
10917 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10918 = PLT_ENTRY_SIZE;
10919 }
10920
10921 /* We need to handle writing out multiple GOT sections ourselves,
10922 since we didn't add them to DYNOBJ. We know dynobj is the first
10923 bfd. */
10924 while ((dynobj = dynobj->link_next) != NULL)
10925 {
10926 asection *s;
10927
10928 if (!is_ppc64_elf_target (dynobj->xvec))
10929 continue;
10930
10931 s = ppc64_elf_tdata (dynobj)->got;
10932 if (s != NULL
10933 && s->size != 0
10934 && s->output_section != bfd_abs_section_ptr
10935 && !bfd_set_section_contents (output_bfd, s->output_section,
10936 s->contents, s->output_offset,
10937 s->size))
10938 return FALSE;
10939 s = ppc64_elf_tdata (dynobj)->relgot;
10940 if (s != NULL
10941 && s->size != 0
10942 && s->output_section != bfd_abs_section_ptr
10943 && !bfd_set_section_contents (output_bfd, s->output_section,
10944 s->contents, s->output_offset,
10945 s->size))
10946 return FALSE;
10947 }
10948
10949 return TRUE;
10950 }
10951
10952 #include "elf64-target.h"
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