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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2014 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
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 "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90 #define elf_backend_object_p ppc64_elf_object_p
91 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93 #define elf_backend_write_core_note ppc64_elf_write_core_note
94 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97 #define elf_backend_check_directives ppc64_elf_before_check_relocs
98 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100 #define elf_backend_check_relocs ppc64_elf_check_relocs
101 #define elf_backend_gc_keep ppc64_elf_gc_keep
102 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
107 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131 /* Offsets to some stack save slots. */
132 #define STK_LR 16
133 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134 /* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139 /* TOC base pointers offset from start of TOC. */
140 #define TOC_BASE_OFF 0x8000
141
142 /* Offset of tp and dtp pointers from start of TLS block. */
143 #define TP_OFFSET 0x7000
144 #define DTP_OFFSET 0x8000
145
146 /* .plt call stub instructions. The normal stub is like this, but
147 sometimes the .plt entry crosses a 64k boundary and we need to
148 insert an addi to adjust r11. */
149 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
150 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
151 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
152 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
153 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
154 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
155 #define BCTR 0x4e800420 /* bctr */
156
157 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
158 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
159 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
160
161 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
162 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
163 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
164 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
165 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
166 #define BNECTR 0x4ca20420 /* bnectr+ */
167 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
168
169 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
170 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
171 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
172
173 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
174
175 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
176 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
177 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
178
179 /* glink call stub instructions. We enter with the index in R0. */
180 #define GLINK_CALL_STUB_SIZE (16*4)
181 /* 0: */
182 /* .quad plt0-1f */
183 /* __glink: */
184 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
185 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
186 /* 1: */
187 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
188 /* ld %2,(0b-1b)(%11) */
189 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
190 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
191 /* ld %12,0(%11) */
192 /* ld %2,8(%11) */
193 /* mtctr %12 */
194 /* ld %11,16(%11) */
195 /* bctr */
196 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
197 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
198 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
199 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
200 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
201
202 /* Pad with this. */
203 #define NOP 0x60000000
204
205 /* Some other nops. */
206 #define CROR_151515 0x4def7b82
207 #define CROR_313131 0x4ffffb82
208
209 /* .glink entries for the first 32k functions are two instructions. */
210 #define LI_R0_0 0x38000000 /* li %r0,0 */
211 #define B_DOT 0x48000000 /* b . */
212
213 /* After that, we need two instructions to load the index, followed by
214 a branch. */
215 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
216 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
217
218 /* Instructions used by the save and restore reg functions. */
219 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
220 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
221 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
222 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
223 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
224 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
225 #define LI_R12_0 0x39800000 /* li %r12,0 */
226 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
227 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
228 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
229 #define BLR 0x4e800020 /* blr */
230
231 /* Since .opd is an array of descriptors and each entry will end up
232 with identical R_PPC64_RELATIVE relocs, there is really no need to
233 propagate .opd relocs; The dynamic linker should be taught to
234 relocate .opd without reloc entries. */
235 #ifndef NO_OPD_RELOCS
236 #define NO_OPD_RELOCS 0
237 #endif
238 \f
239 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
240
241 /* Relocation HOWTO's. */
242 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
243
244 static reloc_howto_type ppc64_elf_howto_raw[] = {
245 /* This reloc does nothing. */
246 HOWTO (R_PPC64_NONE, /* type */
247 0, /* rightshift */
248 2, /* size (0 = byte, 1 = short, 2 = long) */
249 32, /* bitsize */
250 FALSE, /* pc_relative */
251 0, /* bitpos */
252 complain_overflow_dont, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_PPC64_NONE", /* name */
255 FALSE, /* partial_inplace */
256 0, /* src_mask */
257 0, /* dst_mask */
258 FALSE), /* pcrel_offset */
259
260 /* A standard 32 bit relocation. */
261 HOWTO (R_PPC64_ADDR32, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 32, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR32", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* An absolute 26 bit branch; the lower two bits must be zero.
276 FIXME: we don't check that, we just clear them. */
277 HOWTO (R_PPC64_ADDR24, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 26, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_bitfield, /* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_PPC64_ADDR24", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0x03fffffc, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* A standard 16 bit relocation. */
292 HOWTO (R_PPC64_ADDR16, /* type */
293 0, /* rightshift */
294 1, /* size (0 = byte, 1 = short, 2 = long) */
295 16, /* bitsize */
296 FALSE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_bitfield, /* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_PPC64_ADDR16", /* name */
301 FALSE, /* partial_inplace */
302 0, /* src_mask */
303 0xffff, /* dst_mask */
304 FALSE), /* pcrel_offset */
305
306 /* A 16 bit relocation without overflow. */
307 HOWTO (R_PPC64_ADDR16_LO, /* type */
308 0, /* rightshift */
309 1, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_dont,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC64_ADDR16_LO", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* Bits 16-31 of an address. */
322 HOWTO (R_PPC64_ADDR16_HI, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC64_ADDR16_HI", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
337 bits, treated as a signed number, is negative. */
338 HOWTO (R_PPC64_ADDR16_HA, /* type */
339 16, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_signed, /* complain_on_overflow */
345 ppc64_elf_ha_reloc, /* special_function */
346 "R_PPC64_ADDR16_HA", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0xffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch; the lower two bits must be zero.
353 FIXME: we don't check that, we just clear them. */
354 HOWTO (R_PPC64_ADDR14, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 ppc64_elf_branch_reloc, /* special_function */
362 "R_PPC64_ADDR14", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x0000fffc, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 /* An absolute 16 bit branch, for which bit 10 should be set to
369 indicate that the branch is expected to be taken. The lower two
370 bits must be zero. */
371 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 FALSE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 ppc64_elf_brtaken_reloc, /* special_function */
379 "R_PPC64_ADDR14_BRTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0x0000fffc, /* dst_mask */
383 FALSE), /* pcrel_offset */
384
385 /* An absolute 16 bit branch, for which bit 10 should be set to
386 indicate that the branch is not expected to be taken. The lower
387 two bits must be zero. */
388 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
389 0, /* rightshift */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
391 16, /* bitsize */
392 FALSE, /* pc_relative */
393 0, /* bitpos */
394 complain_overflow_signed, /* complain_on_overflow */
395 ppc64_elf_brtaken_reloc, /* special_function */
396 "R_PPC64_ADDR14_BRNTAKEN",/* name */
397 FALSE, /* partial_inplace */
398 0, /* src_mask */
399 0x0000fffc, /* dst_mask */
400 FALSE), /* pcrel_offset */
401
402 /* A relative 26 bit branch; the lower two bits must be zero. */
403 HOWTO (R_PPC64_REL24, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 26, /* bitsize */
407 TRUE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_branch_reloc, /* special_function */
411 "R_PPC64_REL24", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x03fffffc, /* dst_mask */
415 TRUE), /* pcrel_offset */
416
417 /* A relative 16 bit branch; the lower two bits must be zero. */
418 HOWTO (R_PPC64_REL14, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 TRUE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_branch_reloc, /* special_function */
426 "R_PPC64_REL14", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 TRUE), /* pcrel_offset */
431
432 /* A relative 16 bit branch. Bit 10 should be set to indicate that
433 the branch is expected to be taken. The lower two bits must be
434 zero. */
435 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 ppc64_elf_brtaken_reloc, /* special_function */
443 "R_PPC64_REL14_BRTAKEN", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0x0000fffc, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 /* A relative 16 bit branch. Bit 10 should be set to indicate that
450 the branch is not expected to be taken. The lower two bits must
451 be zero. */
452 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
453 0, /* rightshift */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 TRUE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_brtaken_reloc, /* special_function */
460 "R_PPC64_REL14_BRNTAKEN",/* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0x0000fffc, /* dst_mask */
464 TRUE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
467 symbol. */
468 HOWTO (R_PPC64_GOT16, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_signed, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_LO, /* type */
485 0, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont, /* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_LO", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HI, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_signed,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HI", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
515 the symbol. */
516 HOWTO (R_PPC64_GOT16_HA, /* type */
517 16, /* rightshift */
518 1, /* size (0 = byte, 1 = short, 2 = long) */
519 16, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_signed,/* complain_on_overflow */
523 ppc64_elf_unhandled_reloc, /* special_function */
524 "R_PPC64_GOT16_HA", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* This is used only by the dynamic linker. The symbol should exist
531 both in the object being run and in some shared library. The
532 dynamic linker copies the data addressed by the symbol from the
533 shared library into the object, because the object being
534 run has to have the data at some particular address. */
535 HOWTO (R_PPC64_COPY, /* type */
536 0, /* rightshift */
537 0, /* this one is variable size */
538 0, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_COPY", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0, /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Like R_PPC64_ADDR64, but used when setting global offset table
550 entries. */
551 HOWTO (R_PPC64_GLOB_DAT, /* type */
552 0, /* rightshift */
553 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
554 64, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_GLOB_DAT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 ONES (64), /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Created by the link editor. Marks a procedure linkage table
566 entry for a symbol. */
567 HOWTO (R_PPC64_JMP_SLOT, /* type */
568 0, /* rightshift */
569 0, /* size (0 = byte, 1 = short, 2 = long) */
570 0, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_dont, /* complain_on_overflow */
574 ppc64_elf_unhandled_reloc, /* special_function */
575 "R_PPC64_JMP_SLOT", /* name */
576 FALSE, /* partial_inplace */
577 0, /* src_mask */
578 0, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* Used only by the dynamic linker. When the object is run, this
582 doubleword64 is set to the load address of the object, plus the
583 addend. */
584 HOWTO (R_PPC64_RELATIVE, /* type */
585 0, /* rightshift */
586 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
587 64, /* bitsize */
588 FALSE, /* pc_relative */
589 0, /* bitpos */
590 complain_overflow_dont, /* complain_on_overflow */
591 bfd_elf_generic_reloc, /* special_function */
592 "R_PPC64_RELATIVE", /* name */
593 FALSE, /* partial_inplace */
594 0, /* src_mask */
595 ONES (64), /* dst_mask */
596 FALSE), /* pcrel_offset */
597
598 /* Like R_PPC64_ADDR32, but may be unaligned. */
599 HOWTO (R_PPC64_UADDR32, /* type */
600 0, /* rightshift */
601 2, /* size (0 = byte, 1 = short, 2 = long) */
602 32, /* bitsize */
603 FALSE, /* pc_relative */
604 0, /* bitpos */
605 complain_overflow_bitfield, /* complain_on_overflow */
606 bfd_elf_generic_reloc, /* special_function */
607 "R_PPC64_UADDR32", /* name */
608 FALSE, /* partial_inplace */
609 0, /* src_mask */
610 0xffffffff, /* dst_mask */
611 FALSE), /* pcrel_offset */
612
613 /* Like R_PPC64_ADDR16, but may be unaligned. */
614 HOWTO (R_PPC64_UADDR16, /* type */
615 0, /* rightshift */
616 1, /* size (0 = byte, 1 = short, 2 = long) */
617 16, /* bitsize */
618 FALSE, /* pc_relative */
619 0, /* bitpos */
620 complain_overflow_bitfield, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_UADDR16", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffff, /* dst_mask */
626 FALSE), /* pcrel_offset */
627
628 /* 32-bit PC relative. */
629 HOWTO (R_PPC64_REL32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 TRUE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_signed, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_PPC64_REL32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 TRUE), /* pcrel_offset */
642
643 /* 32-bit relocation to the symbol's procedure linkage table. */
644 HOWTO (R_PPC64_PLT32, /* type */
645 0, /* rightshift */
646 2, /* size (0 = byte, 1 = short, 2 = long) */
647 32, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 ppc64_elf_unhandled_reloc, /* special_function */
652 "R_PPC64_PLT32", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffffffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
659 FIXME: R_PPC64_PLTREL32 not supported. */
660 HOWTO (R_PPC64_PLTREL32, /* type */
661 0, /* rightshift */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
663 32, /* bitsize */
664 TRUE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_signed, /* complain_on_overflow */
667 bfd_elf_generic_reloc, /* special_function */
668 "R_PPC64_PLTREL32", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffffffff, /* dst_mask */
672 TRUE), /* pcrel_offset */
673
674 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
675 the symbol. */
676 HOWTO (R_PPC64_PLT16_LO, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_dont, /* complain_on_overflow */
683 ppc64_elf_unhandled_reloc, /* special_function */
684 "R_PPC64_PLT16_LO", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
691 the symbol. */
692 HOWTO (R_PPC64_PLT16_HI, /* type */
693 16, /* rightshift */
694 1, /* size (0 = byte, 1 = short, 2 = long) */
695 16, /* bitsize */
696 FALSE, /* pc_relative */
697 0, /* bitpos */
698 complain_overflow_signed, /* complain_on_overflow */
699 ppc64_elf_unhandled_reloc, /* special_function */
700 "R_PPC64_PLT16_HI", /* name */
701 FALSE, /* partial_inplace */
702 0, /* src_mask */
703 0xffff, /* dst_mask */
704 FALSE), /* pcrel_offset */
705
706 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
707 the symbol. */
708 HOWTO (R_PPC64_PLT16_HA, /* type */
709 16, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_signed, /* complain_on_overflow */
715 ppc64_elf_unhandled_reloc, /* special_function */
716 "R_PPC64_PLT16_HA", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* 16-bit section relative relocation. */
723 HOWTO (R_PPC64_SECTOFF, /* type */
724 0, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_signed, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* Like R_PPC64_SECTOFF, but no overflow warning. */
738 HOWTO (R_PPC64_SECTOFF_LO, /* type */
739 0, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_LO", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HI, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_signed, /* complain_on_overflow */
760 ppc64_elf_sectoff_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HI", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* 16-bit upper half adjusted section relative relocation. */
768 HOWTO (R_PPC64_SECTOFF_HA, /* type */
769 16, /* rightshift */
770 1, /* size (0 = byte, 1 = short, 2 = long) */
771 16, /* bitsize */
772 FALSE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_signed, /* complain_on_overflow */
775 ppc64_elf_sectoff_ha_reloc, /* special_function */
776 "R_PPC64_SECTOFF_HA", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xffff, /* dst_mask */
780 FALSE), /* pcrel_offset */
781
782 /* Like R_PPC64_REL24 without touching the two least significant bits. */
783 HOWTO (R_PPC64_REL30, /* type */
784 2, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 30, /* bitsize */
787 TRUE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_dont, /* complain_on_overflow */
790 bfd_elf_generic_reloc, /* special_function */
791 "R_PPC64_REL30", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xfffffffc, /* dst_mask */
795 TRUE), /* pcrel_offset */
796
797 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
798
799 /* A standard 64-bit relocation. */
800 HOWTO (R_PPC64_ADDR64, /* type */
801 0, /* rightshift */
802 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
803 64, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR64", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 ONES (64), /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address. */
815 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
816 32, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 16, /* bitsize */
819 FALSE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_PPC64_ADDR16_HIGHER", /* name */
824 FALSE, /* partial_inplace */
825 0, /* src_mask */
826 0xffff, /* dst_mask */
827 FALSE), /* pcrel_offset */
828
829 /* The bits 32-47 of an address, plus 1 if the contents of the low
830 16 bits, treated as a signed number, is negative. */
831 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
832 32, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 ppc64_elf_ha_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHERA", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address. */
846 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
847 48, /* rightshift */
848 1, /* size (0 = byte, 1 = short, 2 = long) */
849 16, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont, /* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_PPC64_ADDR16_HIGHEST", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0xffff, /* dst_mask */
858 FALSE), /* pcrel_offset */
859
860 /* The bits 48-63 of an address, plus 1 if the contents of the low
861 16 bits, treated as a signed number, is negative. */
862 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
863 48, /* rightshift */
864 1, /* size (0 = byte, 1 = short, 2 = long) */
865 16, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 ppc64_elf_ha_reloc, /* special_function */
870 "R_PPC64_ADDR16_HIGHESTA", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 0xffff, /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* Like ADDR64, but may be unaligned. */
877 HOWTO (R_PPC64_UADDR64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 FALSE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_UADDR64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 FALSE), /* pcrel_offset */
890
891 /* 64-bit relative relocation. */
892 HOWTO (R_PPC64_REL64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 TRUE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_PPC64_REL64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 TRUE), /* pcrel_offset */
905
906 /* 64-bit relocation to the symbol's procedure linkage table. */
907 HOWTO (R_PPC64_PLT64, /* type */
908 0, /* rightshift */
909 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 64, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_dont, /* complain_on_overflow */
914 ppc64_elf_unhandled_reloc, /* special_function */
915 "R_PPC64_PLT64", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 ONES (64), /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 64-bit PC relative relocation to the symbol's procedure linkage
922 table. */
923 /* FIXME: R_PPC64_PLTREL64 not supported. */
924 HOWTO (R_PPC64_PLTREL64, /* type */
925 0, /* rightshift */
926 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
927 64, /* bitsize */
928 TRUE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc64_elf_unhandled_reloc, /* special_function */
932 "R_PPC64_PLTREL64", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 ONES (64), /* dst_mask */
936 TRUE), /* pcrel_offset */
937
938 /* 16 bit TOC-relative relocation. */
939
940 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
941 HOWTO (R_PPC64_TOC16, /* type */
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_signed, /* complain_on_overflow */
948 ppc64_elf_toc_reloc, /* special_function */
949 "R_PPC64_TOC16", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* 16 bit TOC-relative relocation without overflow. */
956
957 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
958 HOWTO (R_PPC64_TOC16_LO, /* type */
959 0, /* rightshift */
960 1, /* size (0 = byte, 1 = short, 2 = long) */
961 16, /* bitsize */
962 FALSE, /* pc_relative */
963 0, /* bitpos */
964 complain_overflow_dont, /* complain_on_overflow */
965 ppc64_elf_toc_reloc, /* special_function */
966 "R_PPC64_TOC16_LO", /* name */
967 FALSE, /* partial_inplace */
968 0, /* src_mask */
969 0xffff, /* dst_mask */
970 FALSE), /* pcrel_offset */
971
972 /* 16 bit TOC-relative relocation, high 16 bits. */
973
974 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
975 HOWTO (R_PPC64_TOC16_HI, /* type */
976 16, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_signed, /* complain_on_overflow */
982 ppc64_elf_toc_reloc, /* special_function */
983 "R_PPC64_TOC16_HI", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
990 contents of the low 16 bits, treated as a signed number, is
991 negative. */
992
993 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
994 HOWTO (R_PPC64_TOC16_HA, /* type */
995 16, /* 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_toc_ha_reloc, /* special_function */
1002 "R_PPC64_TOC16_HA", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1009
1010 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1011 HOWTO (R_PPC64_TOC, /* type */
1012 0, /* rightshift */
1013 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1014 64, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 ppc64_elf_toc64_reloc, /* special_function */
1019 "R_PPC64_TOC", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 ONES (64), /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_GOT16, but also informs the link editor that the
1026 value to relocate may (!) refer to a PLT entry which the link
1027 editor (a) may replace with the symbol value. If the link editor
1028 is unable to fully resolve the symbol, it may (b) create a PLT
1029 entry and store the address to the new PLT entry in the GOT.
1030 This permits lazy resolution of function symbols at run time.
1031 The link editor may also skip all of this and just (c) emit a
1032 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1033 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1034 HOWTO (R_PPC64_PLTGOT16, /* type */
1035 0, /* rightshift */
1036 1, /* size (0 = byte, 1 = short, 2 = long) */
1037 16, /* bitsize */
1038 FALSE, /* pc_relative */
1039 0, /* bitpos */
1040 complain_overflow_signed, /* complain_on_overflow */
1041 ppc64_elf_unhandled_reloc, /* special_function */
1042 "R_PPC64_PLTGOT16", /* name */
1043 FALSE, /* partial_inplace */
1044 0, /* src_mask */
1045 0xffff, /* dst_mask */
1046 FALSE), /* pcrel_offset */
1047
1048 /* Like R_PPC64_PLTGOT16, but without overflow. */
1049 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1050 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont, /* complain_on_overflow */
1057 ppc64_elf_unhandled_reloc, /* special_function */
1058 "R_PPC64_PLTGOT16_LO", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1065 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1066 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1067 16, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc64_elf_unhandled_reloc, /* special_function */
1074 "R_PPC64_PLTGOT16_HI", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1081 1 if the contents of the low 16 bits, treated as a signed number,
1082 is negative. */
1083 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1084 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1085 16, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc64_elf_unhandled_reloc, /* special_function */
1092 "R_PPC64_PLTGOT16_HA", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_DS, /* type */
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_signed, /* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_DS", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont,/* complain_on_overflow */
1121 bfd_elf_generic_reloc, /* special_function */
1122 "R_PPC64_ADDR16_LO_DS",/* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_signed, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_GOT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 ppc64_elf_unhandled_reloc, /* special_function */
1167 "R_PPC64_PLT16_LO_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_signed, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_DS", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_dont, /* complain_on_overflow */
1196 ppc64_elf_sectoff_reloc, /* special_function */
1197 "R_PPC64_SECTOFF_LO_DS",/* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_signed, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1219 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1220 0, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_dont, /* complain_on_overflow */
1226 ppc64_elf_toc_reloc, /* special_function */
1227 "R_PPC64_TOC16_LO_DS", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1234 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1235 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1236 0, /* rightshift */
1237 1, /* size (0 = byte, 1 = short, 2 = long) */
1238 16, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_signed, /* complain_on_overflow */
1242 ppc64_elf_unhandled_reloc, /* special_function */
1243 "R_PPC64_PLTGOT16_DS", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xfffc, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1250 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1251 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1252 0, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc64_elf_unhandled_reloc, /* special_function */
1259 "R_PPC64_PLTGOT16_LO_DS",/* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xfffc, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* Marker relocs for TLS. */
1266 HOWTO (R_PPC64_TLS,
1267 0, /* rightshift */
1268 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 32, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont, /* complain_on_overflow */
1273 bfd_elf_generic_reloc, /* special_function */
1274 "R_PPC64_TLS", /* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 0, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 HOWTO (R_PPC64_TLSGD,
1281 0, /* rightshift */
1282 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 32, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC64_TLSGD", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 HOWTO (R_PPC64_TLSLD,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLSLD", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TOCSAVE,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TOCSAVE", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 /* Computes the load module index of the load module that contains the
1323 definition of its TLS sym. */
1324 HOWTO (R_PPC64_DTPMOD64,
1325 0, /* rightshift */
1326 4, /* size (0 = byte, 1 = short, 2 = long) */
1327 64, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 ppc64_elf_unhandled_reloc, /* special_function */
1332 "R_PPC64_DTPMOD64", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 ONES (64), /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 /* Computes a dtv-relative displacement, the difference between the value
1339 of sym+add and the base address of the thread-local storage block that
1340 contains the definition of sym, minus 0x8000. */
1341 HOWTO (R_PPC64_DTPREL64,
1342 0, /* rightshift */
1343 4, /* size (0 = byte, 1 = short, 2 = long) */
1344 64, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL64", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 ONES (64), /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* A 16 bit dtprel reloc. */
1356 HOWTO (R_PPC64_DTPREL16,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_signed, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16, but no overflow. */
1371 HOWTO (R_PPC64_DTPREL16_LO,
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_LO", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HI,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_signed, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HI", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HA,
1402 16, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_signed, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HA", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHER,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHER", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1432 32, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHERA", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHEST", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1461 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1462 48, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16, but for insns with a DS field. */
1476 HOWTO (R_PPC64_DTPREL16_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_signed, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Like DTPREL16_DS, but no overflow. */
1491 HOWTO (R_PPC64_DTPREL16_LO_DS,
1492 0, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_dont, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_DTPREL16_LO_DS", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xfffc, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* Computes a tp-relative displacement, the difference between the value of
1506 sym+add and the value of the thread pointer (r13). */
1507 HOWTO (R_PPC64_TPREL64,
1508 0, /* rightshift */
1509 4, /* size (0 = byte, 1 = short, 2 = long) */
1510 64, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL64", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 ONES (64), /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* A 16 bit tprel reloc. */
1522 HOWTO (R_PPC64_TPREL16,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_signed, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16, but no overflow. */
1537 HOWTO (R_PPC64_TPREL16_LO,
1538 0, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_LO", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_LO, but next higher group of 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HI,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_signed, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HI", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but adjust for low 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HA,
1568 16, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_signed, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HA", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HI, but next higher group of 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHER,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHER", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHERA,
1598 32, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHERA", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHEST,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHEST", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1627 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1628 48, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_HIGHESTA", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16, but for insns with a DS field. */
1642 HOWTO (R_PPC64_TPREL16_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_signed, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Like TPREL16_DS, but no overflow. */
1657 HOWTO (R_PPC64_TPREL16_LO_DS,
1658 0, /* rightshift */
1659 1, /* size (0 = byte, 1 = short, 2 = long) */
1660 16, /* bitsize */
1661 FALSE, /* pc_relative */
1662 0, /* bitpos */
1663 complain_overflow_dont, /* complain_on_overflow */
1664 ppc64_elf_unhandled_reloc, /* special_function */
1665 "R_PPC64_TPREL16_LO_DS", /* name */
1666 FALSE, /* partial_inplace */
1667 0, /* src_mask */
1668 0xfffc, /* dst_mask */
1669 FALSE), /* pcrel_offset */
1670
1671 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1672 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1673 to the first entry relative to the TOC base (r2). */
1674 HOWTO (R_PPC64_GOT_TLSGD16,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16, but no overflow. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_signed, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1719 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 FALSE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_signed, /* complain_on_overflow */
1726 ppc64_elf_unhandled_reloc, /* special_function */
1727 "R_PPC64_GOT_TLSGD16_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 FALSE), /* pcrel_offset */
1732
1733 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1734 with values (sym+add)@dtpmod and zero, and computes the offset to the
1735 first entry relative to the TOC base (r2). */
1736 HOWTO (R_PPC64_GOT_TLSLD16,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_signed, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16, but no overflow. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1752 0, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_LO", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HI", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1781 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1782 16, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_signed, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TLSLD16_HA", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xffff, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1796 the offset to the entry relative to the TOC base (r2). */
1797 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_signed, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_DS, but no overflow. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1813 0, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xfffc, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_signed, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HI", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1842 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1843 16, /* rightshift */
1844 1, /* size (0 = byte, 1 = short, 2 = long) */
1845 16, /* bitsize */
1846 FALSE, /* pc_relative */
1847 0, /* bitpos */
1848 complain_overflow_signed, /* complain_on_overflow */
1849 ppc64_elf_unhandled_reloc, /* special_function */
1850 "R_PPC64_GOT_DTPREL16_HA", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xffff, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1857 offset to the entry relative to the TOC base (r2). */
1858 HOWTO (R_PPC64_GOT_TPREL16_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_signed, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_DS, but no overflow. */
1873 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1874 0, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xfffc, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HI,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_signed, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HI", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1903 HOWTO (R_PPC64_GOT_TPREL16_HA,
1904 16, /* rightshift */
1905 1, /* size (0 = byte, 1 = short, 2 = long) */
1906 16, /* bitsize */
1907 FALSE, /* pc_relative */
1908 0, /* bitpos */
1909 complain_overflow_signed, /* complain_on_overflow */
1910 ppc64_elf_unhandled_reloc, /* special_function */
1911 "R_PPC64_GOT_TPREL16_HA", /* name */
1912 FALSE, /* partial_inplace */
1913 0, /* src_mask */
1914 0xffff, /* dst_mask */
1915 FALSE), /* pcrel_offset */
1916
1917 HOWTO (R_PPC64_JMP_IREL, /* type */
1918 0, /* rightshift */
1919 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1920 0, /* bitsize */
1921 FALSE, /* pc_relative */
1922 0, /* bitpos */
1923 complain_overflow_dont, /* complain_on_overflow */
1924 ppc64_elf_unhandled_reloc, /* special_function */
1925 "R_PPC64_JMP_IREL", /* name */
1926 FALSE, /* partial_inplace */
1927 0, /* src_mask */
1928 0, /* dst_mask */
1929 FALSE), /* pcrel_offset */
1930
1931 HOWTO (R_PPC64_IRELATIVE, /* type */
1932 0, /* rightshift */
1933 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1934 64, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_dont, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_IRELATIVE", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 ONES (64), /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation. */
1946 HOWTO (R_PPC64_REL16, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_signed, /* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* A 16 bit relative relocation without overflow. */
1961 HOWTO (R_PPC64_REL16_LO, /* type */
1962 0, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont,/* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_LO", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address. */
1976 HOWTO (R_PPC64_REL16_HI, /* type */
1977 16, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_signed, /* complain_on_overflow */
1983 bfd_elf_generic_reloc, /* special_function */
1984 "R_PPC64_REL16_HI", /* name */
1985 FALSE, /* partial_inplace */
1986 0, /* src_mask */
1987 0xffff, /* dst_mask */
1988 TRUE), /* pcrel_offset */
1989
1990 /* The high order 16 bits of a relative address, plus 1 if the contents of
1991 the low 16 bits, treated as a signed number, is negative. */
1992 HOWTO (R_PPC64_REL16_HA, /* type */
1993 16, /* rightshift */
1994 1, /* size (0 = byte, 1 = short, 2 = long) */
1995 16, /* bitsize */
1996 TRUE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_signed, /* complain_on_overflow */
1999 ppc64_elf_ha_reloc, /* special_function */
2000 "R_PPC64_REL16_HA", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0xffff, /* dst_mask */
2004 TRUE), /* pcrel_offset */
2005
2006 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2007 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2008 16, /* rightshift */
2009 1, /* size (0 = byte, 1 = short, 2 = long) */
2010 16, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 bfd_elf_generic_reloc, /* special_function */
2015 "R_PPC64_ADDR16_HIGH", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0xffff, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020
2021 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2022 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2023 16, /* rightshift */
2024 1, /* size (0 = byte, 1 = short, 2 = long) */
2025 16, /* bitsize */
2026 FALSE, /* pc_relative */
2027 0, /* bitpos */
2028 complain_overflow_dont, /* complain_on_overflow */
2029 ppc64_elf_ha_reloc, /* special_function */
2030 "R_PPC64_ADDR16_HIGHA", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 FALSE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2037 HOWTO (R_PPC64_DTPREL16_HIGH,
2038 16, /* rightshift */
2039 1, /* size (0 = byte, 1 = short, 2 = long) */
2040 16, /* bitsize */
2041 FALSE, /* pc_relative */
2042 0, /* bitpos */
2043 complain_overflow_dont, /* complain_on_overflow */
2044 ppc64_elf_unhandled_reloc, /* special_function */
2045 "R_PPC64_DTPREL16_HIGH", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0xffff, /* dst_mask */
2049 FALSE), /* pcrel_offset */
2050
2051 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2052 HOWTO (R_PPC64_DTPREL16_HIGHA,
2053 16, /* rightshift */
2054 1, /* size (0 = byte, 1 = short, 2 = long) */
2055 16, /* bitsize */
2056 FALSE, /* pc_relative */
2057 0, /* bitpos */
2058 complain_overflow_dont, /* complain_on_overflow */
2059 ppc64_elf_unhandled_reloc, /* special_function */
2060 "R_PPC64_DTPREL16_HIGHA", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0xffff, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2067 HOWTO (R_PPC64_TPREL16_HIGH,
2068 16, /* rightshift */
2069 1, /* size (0 = byte, 1 = short, 2 = long) */
2070 16, /* bitsize */
2071 FALSE, /* pc_relative */
2072 0, /* bitpos */
2073 complain_overflow_dont, /* complain_on_overflow */
2074 ppc64_elf_unhandled_reloc, /* special_function */
2075 "R_PPC64_TPREL16_HIGH", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2082 HOWTO (R_PPC64_TPREL16_HIGHA,
2083 16, /* rightshift */
2084 1, /* size (0 = byte, 1 = short, 2 = long) */
2085 16, /* bitsize */
2086 FALSE, /* pc_relative */
2087 0, /* bitpos */
2088 complain_overflow_dont, /* complain_on_overflow */
2089 ppc64_elf_unhandled_reloc, /* special_function */
2090 "R_PPC64_TPREL16_HIGHA", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0xffff, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* Like ADDR64, but use local entry point of function. */
2097 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2098 0, /* rightshift */
2099 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2100 64, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 bfd_elf_generic_reloc, /* special_function */
2105 "R_PPC64_ADDR64_LOCAL", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 ONES (64), /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110
2111 /* GNU extension to record C++ vtable hierarchy. */
2112 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2113 0, /* rightshift */
2114 0, /* size (0 = byte, 1 = short, 2 = long) */
2115 0, /* bitsize */
2116 FALSE, /* pc_relative */
2117 0, /* bitpos */
2118 complain_overflow_dont, /* complain_on_overflow */
2119 NULL, /* special_function */
2120 "R_PPC64_GNU_VTINHERIT", /* name */
2121 FALSE, /* partial_inplace */
2122 0, /* src_mask */
2123 0, /* dst_mask */
2124 FALSE), /* pcrel_offset */
2125
2126 /* GNU extension to record C++ vtable member usage. */
2127 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2128 0, /* rightshift */
2129 0, /* size (0 = byte, 1 = short, 2 = long) */
2130 0, /* bitsize */
2131 FALSE, /* pc_relative */
2132 0, /* bitpos */
2133 complain_overflow_dont, /* complain_on_overflow */
2134 NULL, /* special_function */
2135 "R_PPC64_GNU_VTENTRY", /* name */
2136 FALSE, /* partial_inplace */
2137 0, /* src_mask */
2138 0, /* dst_mask */
2139 FALSE), /* pcrel_offset */
2140 };
2141
2142 \f
2143 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2144 be done. */
2145
2146 static void
2147 ppc_howto_init (void)
2148 {
2149 unsigned int i, type;
2150
2151 for (i = 0;
2152 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2153 i++)
2154 {
2155 type = ppc64_elf_howto_raw[i].type;
2156 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2157 / sizeof (ppc64_elf_howto_table[0])));
2158 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2159 }
2160 }
2161
2162 static reloc_howto_type *
2163 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2164 bfd_reloc_code_real_type code)
2165 {
2166 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2167
2168 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2169 /* Initialize howto table if needed. */
2170 ppc_howto_init ();
2171
2172 switch (code)
2173 {
2174 default:
2175 return NULL;
2176
2177 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2178 break;
2179 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2180 break;
2181 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2182 break;
2183 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2184 break;
2185 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2186 break;
2187 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2188 break;
2189 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2190 break;
2191 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2192 break;
2193 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2194 break;
2195 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2196 break;
2197 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2198 break;
2199 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2200 break;
2201 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2202 break;
2203 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2204 break;
2205 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2206 break;
2207 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2208 break;
2209 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2210 break;
2211 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2212 break;
2213 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2214 break;
2215 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2216 break;
2217 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2218 break;
2219 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2220 break;
2221 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2222 break;
2223 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2224 break;
2225 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2226 break;
2227 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2228 break;
2229 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2230 break;
2231 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2232 break;
2233 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2234 break;
2235 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2236 break;
2237 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2238 break;
2239 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2240 break;
2241 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2242 break;
2243 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2244 break;
2245 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2246 break;
2247 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2248 break;
2249 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2250 break;
2251 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2252 break;
2253 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2254 break;
2255 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2256 break;
2257 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2258 break;
2259 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2260 break;
2261 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2262 break;
2263 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2264 break;
2265 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2266 break;
2267 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2268 break;
2269 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2270 break;
2271 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2272 break;
2273 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2274 break;
2275 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2276 break;
2277 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2278 break;
2279 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2280 break;
2281 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2282 break;
2283 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2284 break;
2285 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2286 break;
2287 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2288 break;
2289 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2290 break;
2291 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2292 break;
2293 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2294 break;
2295 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2296 break;
2297 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2298 break;
2299 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2300 break;
2301 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2302 break;
2303 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2304 break;
2305 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2306 break;
2307 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2308 break;
2309 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2310 break;
2311 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2312 break;
2313 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2314 break;
2315 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2316 break;
2317 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2318 break;
2319 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2320 break;
2321 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2322 break;
2323 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2324 break;
2325 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2326 break;
2327 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2328 break;
2329 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2330 break;
2331 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2332 break;
2333 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2334 break;
2335 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2336 break;
2337 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2338 break;
2339 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2340 break;
2341 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2342 break;
2343 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2344 break;
2345 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2346 break;
2347 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2348 break;
2349 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2350 break;
2351 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2352 break;
2353 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2356 break;
2357 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2358 break;
2359 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2360 break;
2361 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2362 break;
2363 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2364 break;
2365 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2368 break;
2369 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2370 break;
2371 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2372 break;
2373 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2374 break;
2375 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2376 break;
2377 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2378 break;
2379 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2382 break;
2383 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2384 break;
2385 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2386 break;
2387 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2388 break;
2389 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2390 break;
2391 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2392 break;
2393 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2394 break;
2395 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2396 break;
2397 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2398 break;
2399 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2400 break;
2401 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2402 break;
2403 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2404 break;
2405 }
2406
2407 return ppc64_elf_howto_table[r];
2408 };
2409
2410 static reloc_howto_type *
2411 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2412 const char *r_name)
2413 {
2414 unsigned int i;
2415
2416 for (i = 0;
2417 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2418 i++)
2419 if (ppc64_elf_howto_raw[i].name != NULL
2420 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2421 return &ppc64_elf_howto_raw[i];
2422
2423 return NULL;
2424 }
2425
2426 /* Set the howto pointer for a PowerPC ELF reloc. */
2427
2428 static void
2429 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2430 Elf_Internal_Rela *dst)
2431 {
2432 unsigned int type;
2433
2434 /* Initialize howto table if needed. */
2435 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2436 ppc_howto_init ();
2437
2438 type = ELF64_R_TYPE (dst->r_info);
2439 if (type >= (sizeof (ppc64_elf_howto_table)
2440 / sizeof (ppc64_elf_howto_table[0])))
2441 {
2442 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2443 abfd, (int) type);
2444 type = R_PPC64_NONE;
2445 }
2446 cache_ptr->howto = ppc64_elf_howto_table[type];
2447 }
2448
2449 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2450
2451 static bfd_reloc_status_type
2452 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2453 void *data, asection *input_section,
2454 bfd *output_bfd, char **error_message)
2455 {
2456 /* If this is a relocatable link (output_bfd test tells us), just
2457 call the generic function. Any adjustment will be done at final
2458 link time. */
2459 if (output_bfd != NULL)
2460 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2461 input_section, output_bfd, error_message);
2462
2463 /* Adjust the addend for sign extension of the low 16 bits.
2464 We won't actually be using the low 16 bits, so trashing them
2465 doesn't matter. */
2466 reloc_entry->addend += 0x8000;
2467 return bfd_reloc_continue;
2468 }
2469
2470 static bfd_reloc_status_type
2471 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2472 void *data, asection *input_section,
2473 bfd *output_bfd, char **error_message)
2474 {
2475 if (output_bfd != NULL)
2476 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2477 input_section, output_bfd, error_message);
2478
2479 if (strcmp (symbol->section->name, ".opd") == 0
2480 && (symbol->section->owner->flags & DYNAMIC) == 0)
2481 {
2482 bfd_vma dest = opd_entry_value (symbol->section,
2483 symbol->value + reloc_entry->addend,
2484 NULL, NULL, FALSE);
2485 if (dest != (bfd_vma) -1)
2486 reloc_entry->addend = dest - (symbol->value
2487 + symbol->section->output_section->vma
2488 + symbol->section->output_offset);
2489 }
2490 return bfd_reloc_continue;
2491 }
2492
2493 static bfd_reloc_status_type
2494 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2495 void *data, asection *input_section,
2496 bfd *output_bfd, char **error_message)
2497 {
2498 long insn;
2499 enum elf_ppc64_reloc_type r_type;
2500 bfd_size_type octets;
2501 /* Assume 'at' branch hints. */
2502 bfd_boolean is_isa_v2 = TRUE;
2503
2504 /* If this is a relocatable link (output_bfd test tells us), just
2505 call the generic function. Any adjustment will be done at final
2506 link time. */
2507 if (output_bfd != NULL)
2508 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2509 input_section, output_bfd, error_message);
2510
2511 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2512 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2513 insn &= ~(0x01 << 21);
2514 r_type = reloc_entry->howto->type;
2515 if (r_type == R_PPC64_ADDR14_BRTAKEN
2516 || r_type == R_PPC64_REL14_BRTAKEN)
2517 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2518
2519 if (is_isa_v2)
2520 {
2521 /* Set 'a' bit. This is 0b00010 in BO field for branch
2522 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2523 for branch on CTR insns (BO == 1a00t or 1a01t). */
2524 if ((insn & (0x14 << 21)) == (0x04 << 21))
2525 insn |= 0x02 << 21;
2526 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2527 insn |= 0x08 << 21;
2528 else
2529 goto out;
2530 }
2531 else
2532 {
2533 bfd_vma target = 0;
2534 bfd_vma from;
2535
2536 if (!bfd_is_com_section (symbol->section))
2537 target = symbol->value;
2538 target += symbol->section->output_section->vma;
2539 target += symbol->section->output_offset;
2540 target += reloc_entry->addend;
2541
2542 from = (reloc_entry->address
2543 + input_section->output_offset
2544 + input_section->output_section->vma);
2545
2546 /* Invert 'y' bit if not the default. */
2547 if ((bfd_signed_vma) (target - from) < 0)
2548 insn ^= 0x01 << 21;
2549 }
2550 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2551 out:
2552 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2553 input_section, output_bfd, error_message);
2554 }
2555
2556 static bfd_reloc_status_type
2557 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2558 void *data, asection *input_section,
2559 bfd *output_bfd, char **error_message)
2560 {
2561 /* If this is a relocatable link (output_bfd test tells us), just
2562 call the generic function. Any adjustment will be done at final
2563 link time. */
2564 if (output_bfd != NULL)
2565 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2566 input_section, output_bfd, error_message);
2567
2568 /* Subtract the symbol section base address. */
2569 reloc_entry->addend -= symbol->section->output_section->vma;
2570 return bfd_reloc_continue;
2571 }
2572
2573 static bfd_reloc_status_type
2574 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2575 void *data, asection *input_section,
2576 bfd *output_bfd, char **error_message)
2577 {
2578 /* If this is a relocatable link (output_bfd test tells us), just
2579 call the generic function. Any adjustment will be done at final
2580 link time. */
2581 if (output_bfd != NULL)
2582 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2583 input_section, output_bfd, error_message);
2584
2585 /* Subtract the symbol section base address. */
2586 reloc_entry->addend -= symbol->section->output_section->vma;
2587
2588 /* Adjust the addend for sign extension of the low 16 bits. */
2589 reloc_entry->addend += 0x8000;
2590 return bfd_reloc_continue;
2591 }
2592
2593 static bfd_reloc_status_type
2594 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2595 void *data, asection *input_section,
2596 bfd *output_bfd, char **error_message)
2597 {
2598 bfd_vma TOCstart;
2599
2600 /* If this is a relocatable link (output_bfd test tells us), just
2601 call the generic function. Any adjustment will be done at final
2602 link time. */
2603 if (output_bfd != NULL)
2604 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2605 input_section, output_bfd, error_message);
2606
2607 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2608 if (TOCstart == 0)
2609 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2610
2611 /* Subtract the TOC base address. */
2612 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2613 return bfd_reloc_continue;
2614 }
2615
2616 static bfd_reloc_status_type
2617 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2618 void *data, asection *input_section,
2619 bfd *output_bfd, char **error_message)
2620 {
2621 bfd_vma TOCstart;
2622
2623 /* If this is a relocatable link (output_bfd test tells us), just
2624 call the generic function. Any adjustment will be done at final
2625 link time. */
2626 if (output_bfd != NULL)
2627 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2628 input_section, output_bfd, error_message);
2629
2630 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2631 if (TOCstart == 0)
2632 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2633
2634 /* Subtract the TOC base address. */
2635 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2636
2637 /* Adjust the addend for sign extension of the low 16 bits. */
2638 reloc_entry->addend += 0x8000;
2639 return bfd_reloc_continue;
2640 }
2641
2642 static bfd_reloc_status_type
2643 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2644 void *data, asection *input_section,
2645 bfd *output_bfd, char **error_message)
2646 {
2647 bfd_vma TOCstart;
2648 bfd_size_type octets;
2649
2650 /* If this is a relocatable link (output_bfd test tells us), just
2651 call the generic function. Any adjustment will be done at final
2652 link time. */
2653 if (output_bfd != NULL)
2654 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2655 input_section, output_bfd, error_message);
2656
2657 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2658 if (TOCstart == 0)
2659 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2660
2661 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2662 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2663 return bfd_reloc_ok;
2664 }
2665
2666 static bfd_reloc_status_type
2667 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2668 void *data, asection *input_section,
2669 bfd *output_bfd, char **error_message)
2670 {
2671 /* If this is a relocatable link (output_bfd test tells us), just
2672 call the generic function. Any adjustment will be done at final
2673 link time. */
2674 if (output_bfd != NULL)
2675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2676 input_section, output_bfd, error_message);
2677
2678 if (error_message != NULL)
2679 {
2680 static char buf[60];
2681 sprintf (buf, "generic linker can't handle %s",
2682 reloc_entry->howto->name);
2683 *error_message = buf;
2684 }
2685 return bfd_reloc_dangerous;
2686 }
2687
2688 /* Track GOT entries needed for a given symbol. We might need more
2689 than one got entry per symbol. */
2690 struct got_entry
2691 {
2692 struct got_entry *next;
2693
2694 /* The symbol addend that we'll be placing in the GOT. */
2695 bfd_vma addend;
2696
2697 /* Unlike other ELF targets, we use separate GOT entries for the same
2698 symbol referenced from different input files. This is to support
2699 automatic multiple TOC/GOT sections, where the TOC base can vary
2700 from one input file to another. After partitioning into TOC groups
2701 we merge entries within the group.
2702
2703 Point to the BFD owning this GOT entry. */
2704 bfd *owner;
2705
2706 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2707 TLS_TPREL or TLS_DTPREL for tls entries. */
2708 unsigned char tls_type;
2709
2710 /* Non-zero if got.ent points to real entry. */
2711 unsigned char is_indirect;
2712
2713 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2714 union
2715 {
2716 bfd_signed_vma refcount;
2717 bfd_vma offset;
2718 struct got_entry *ent;
2719 } got;
2720 };
2721
2722 /* The same for PLT. */
2723 struct plt_entry
2724 {
2725 struct plt_entry *next;
2726
2727 bfd_vma addend;
2728
2729 union
2730 {
2731 bfd_signed_vma refcount;
2732 bfd_vma offset;
2733 } plt;
2734 };
2735
2736 struct ppc64_elf_obj_tdata
2737 {
2738 struct elf_obj_tdata elf;
2739
2740 /* Shortcuts to dynamic linker sections. */
2741 asection *got;
2742 asection *relgot;
2743
2744 /* Used during garbage collection. We attach global symbols defined
2745 on removed .opd entries to this section so that the sym is removed. */
2746 asection *deleted_section;
2747
2748 /* TLS local dynamic got entry handling. Support for multiple GOT
2749 sections means we potentially need one of these for each input bfd. */
2750 struct got_entry tlsld_got;
2751
2752 union {
2753 /* A copy of relocs before they are modified for --emit-relocs. */
2754 Elf_Internal_Rela *relocs;
2755
2756 /* Section contents. */
2757 bfd_byte *contents;
2758 } opd;
2759
2760 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2761 the reloc to be in the range -32768 to 32767. */
2762 unsigned int has_small_toc_reloc : 1;
2763
2764 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2765 instruction not one we handle. */
2766 unsigned int unexpected_toc_insn : 1;
2767 };
2768
2769 #define ppc64_elf_tdata(bfd) \
2770 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2771
2772 #define ppc64_tlsld_got(bfd) \
2773 (&ppc64_elf_tdata (bfd)->tlsld_got)
2774
2775 #define is_ppc64_elf(bfd) \
2776 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2777 && elf_object_id (bfd) == PPC64_ELF_DATA)
2778
2779 /* Override the generic function because we store some extras. */
2780
2781 static bfd_boolean
2782 ppc64_elf_mkobject (bfd *abfd)
2783 {
2784 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2785 PPC64_ELF_DATA);
2786 }
2787
2788 /* Fix bad default arch selected for a 64 bit input bfd when the
2789 default is 32 bit. */
2790
2791 static bfd_boolean
2792 ppc64_elf_object_p (bfd *abfd)
2793 {
2794 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2795 {
2796 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2797
2798 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2799 {
2800 /* Relies on arch after 32 bit default being 64 bit default. */
2801 abfd->arch_info = abfd->arch_info->next;
2802 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2803 }
2804 }
2805 return TRUE;
2806 }
2807
2808 /* Support for core dump NOTE sections. */
2809
2810 static bfd_boolean
2811 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2812 {
2813 size_t offset, size;
2814
2815 if (note->descsz != 504)
2816 return FALSE;
2817
2818 /* pr_cursig */
2819 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2820
2821 /* pr_pid */
2822 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2823
2824 /* pr_reg */
2825 offset = 112;
2826 size = 384;
2827
2828 /* Make a ".reg/999" section. */
2829 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2830 size, note->descpos + offset);
2831 }
2832
2833 static bfd_boolean
2834 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2835 {
2836 if (note->descsz != 136)
2837 return FALSE;
2838
2839 elf_tdata (abfd)->core->pid
2840 = bfd_get_32 (abfd, note->descdata + 24);
2841 elf_tdata (abfd)->core->program
2842 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2843 elf_tdata (abfd)->core->command
2844 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2845
2846 return TRUE;
2847 }
2848
2849 static char *
2850 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2851 ...)
2852 {
2853 switch (note_type)
2854 {
2855 default:
2856 return NULL;
2857
2858 case NT_PRPSINFO:
2859 {
2860 char data[136];
2861 va_list ap;
2862
2863 va_start (ap, note_type);
2864 memset (data, 0, sizeof (data));
2865 strncpy (data + 40, va_arg (ap, const char *), 16);
2866 strncpy (data + 56, va_arg (ap, const char *), 80);
2867 va_end (ap);
2868 return elfcore_write_note (abfd, buf, bufsiz,
2869 "CORE", note_type, data, sizeof (data));
2870 }
2871
2872 case NT_PRSTATUS:
2873 {
2874 char data[504];
2875 va_list ap;
2876 long pid;
2877 int cursig;
2878 const void *greg;
2879
2880 va_start (ap, note_type);
2881 memset (data, 0, 112);
2882 pid = va_arg (ap, long);
2883 bfd_put_32 (abfd, pid, data + 32);
2884 cursig = va_arg (ap, int);
2885 bfd_put_16 (abfd, cursig, data + 12);
2886 greg = va_arg (ap, const void *);
2887 memcpy (data + 112, greg, 384);
2888 memset (data + 496, 0, 8);
2889 va_end (ap);
2890 return elfcore_write_note (abfd, buf, bufsiz,
2891 "CORE", note_type, data, sizeof (data));
2892 }
2893 }
2894 }
2895
2896 /* Add extra PPC sections. */
2897
2898 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2899 {
2900 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2901 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2902 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2903 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2904 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2905 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2906 { NULL, 0, 0, 0, 0 }
2907 };
2908
2909 enum _ppc64_sec_type {
2910 sec_normal = 0,
2911 sec_opd = 1,
2912 sec_toc = 2
2913 };
2914
2915 struct _ppc64_elf_section_data
2916 {
2917 struct bfd_elf_section_data elf;
2918
2919 union
2920 {
2921 /* An array with one entry for each opd function descriptor. */
2922 struct _opd_sec_data
2923 {
2924 /* Points to the function code section for local opd entries. */
2925 asection **func_sec;
2926
2927 /* After editing .opd, adjust references to opd local syms. */
2928 long *adjust;
2929 } opd;
2930
2931 /* An array for toc sections, indexed by offset/8. */
2932 struct _toc_sec_data
2933 {
2934 /* Specifies the relocation symbol index used at a given toc offset. */
2935 unsigned *symndx;
2936
2937 /* And the relocation addend. */
2938 bfd_vma *add;
2939 } toc;
2940 } u;
2941
2942 enum _ppc64_sec_type sec_type:2;
2943
2944 /* Flag set when small branches are detected. Used to
2945 select suitable defaults for the stub group size. */
2946 unsigned int has_14bit_branch:1;
2947 };
2948
2949 #define ppc64_elf_section_data(sec) \
2950 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2951
2952 static bfd_boolean
2953 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2954 {
2955 if (!sec->used_by_bfd)
2956 {
2957 struct _ppc64_elf_section_data *sdata;
2958 bfd_size_type amt = sizeof (*sdata);
2959
2960 sdata = bfd_zalloc (abfd, amt);
2961 if (sdata == NULL)
2962 return FALSE;
2963 sec->used_by_bfd = sdata;
2964 }
2965
2966 return _bfd_elf_new_section_hook (abfd, sec);
2967 }
2968
2969 static struct _opd_sec_data *
2970 get_opd_info (asection * sec)
2971 {
2972 if (sec != NULL
2973 && ppc64_elf_section_data (sec) != NULL
2974 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2975 return &ppc64_elf_section_data (sec)->u.opd;
2976 return NULL;
2977 }
2978
2979 static inline int
2980 abiversion (bfd *abfd)
2981 {
2982 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
2983 }
2984
2985 static inline void
2986 set_abiversion (bfd *abfd, int ver)
2987 {
2988 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
2989 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
2990 }
2991 \f
2992 /* Parameters for the qsort hook. */
2993 static bfd_boolean synthetic_relocatable;
2994
2995 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2996
2997 static int
2998 compare_symbols (const void *ap, const void *bp)
2999 {
3000 const asymbol *a = * (const asymbol **) ap;
3001 const asymbol *b = * (const asymbol **) bp;
3002
3003 /* Section symbols first. */
3004 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3005 return -1;
3006 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3007 return 1;
3008
3009 /* then .opd symbols. */
3010 if (strcmp (a->section->name, ".opd") == 0
3011 && strcmp (b->section->name, ".opd") != 0)
3012 return -1;
3013 if (strcmp (a->section->name, ".opd") != 0
3014 && strcmp (b->section->name, ".opd") == 0)
3015 return 1;
3016
3017 /* then other code symbols. */
3018 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3019 == (SEC_CODE | SEC_ALLOC)
3020 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3021 != (SEC_CODE | SEC_ALLOC))
3022 return -1;
3023
3024 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3025 != (SEC_CODE | SEC_ALLOC)
3026 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3027 == (SEC_CODE | SEC_ALLOC))
3028 return 1;
3029
3030 if (synthetic_relocatable)
3031 {
3032 if (a->section->id < b->section->id)
3033 return -1;
3034
3035 if (a->section->id > b->section->id)
3036 return 1;
3037 }
3038
3039 if (a->value + a->section->vma < b->value + b->section->vma)
3040 return -1;
3041
3042 if (a->value + a->section->vma > b->value + b->section->vma)
3043 return 1;
3044
3045 /* For syms with the same value, prefer strong dynamic global function
3046 syms over other syms. */
3047 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3048 return -1;
3049
3050 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3051 return 1;
3052
3053 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3054 return -1;
3055
3056 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3057 return 1;
3058
3059 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3060 return -1;
3061
3062 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3063 return 1;
3064
3065 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3066 return -1;
3067
3068 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3069 return 1;
3070
3071 return 0;
3072 }
3073
3074 /* Search SYMS for a symbol of the given VALUE. */
3075
3076 static asymbol *
3077 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3078 {
3079 long mid;
3080
3081 if (id == -1)
3082 {
3083 while (lo < hi)
3084 {
3085 mid = (lo + hi) >> 1;
3086 if (syms[mid]->value + syms[mid]->section->vma < value)
3087 lo = mid + 1;
3088 else if (syms[mid]->value + syms[mid]->section->vma > value)
3089 hi = mid;
3090 else
3091 return syms[mid];
3092 }
3093 }
3094 else
3095 {
3096 while (lo < hi)
3097 {
3098 mid = (lo + hi) >> 1;
3099 if (syms[mid]->section->id < id)
3100 lo = mid + 1;
3101 else if (syms[mid]->section->id > id)
3102 hi = mid;
3103 else if (syms[mid]->value < value)
3104 lo = mid + 1;
3105 else if (syms[mid]->value > value)
3106 hi = mid;
3107 else
3108 return syms[mid];
3109 }
3110 }
3111 return NULL;
3112 }
3113
3114 static bfd_boolean
3115 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3116 {
3117 bfd_vma vma = *(bfd_vma *) ptr;
3118 return ((section->flags & SEC_ALLOC) != 0
3119 && section->vma <= vma
3120 && vma < section->vma + section->size);
3121 }
3122
3123 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3124 entry syms. Also generate @plt symbols for the glink branch table. */
3125
3126 static long
3127 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3128 long static_count, asymbol **static_syms,
3129 long dyn_count, asymbol **dyn_syms,
3130 asymbol **ret)
3131 {
3132 asymbol *s;
3133 long i;
3134 long count;
3135 char *names;
3136 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3137 asection *opd = NULL;
3138 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3139 asymbol **syms;
3140 int abi = abiversion (abfd);
3141
3142 *ret = NULL;
3143
3144 if (abi < 2)
3145 {
3146 opd = bfd_get_section_by_name (abfd, ".opd");
3147 if (opd == NULL && abi == 1)
3148 return 0;
3149 }
3150
3151 symcount = static_count;
3152 if (!relocatable)
3153 symcount += dyn_count;
3154 if (symcount == 0)
3155 return 0;
3156
3157 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3158 if (syms == NULL)
3159 return -1;
3160
3161 if (!relocatable && static_count != 0 && dyn_count != 0)
3162 {
3163 /* Use both symbol tables. */
3164 memcpy (syms, static_syms, static_count * sizeof (*syms));
3165 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3166 }
3167 else if (!relocatable && static_count == 0)
3168 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3169 else
3170 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3171
3172 synthetic_relocatable = relocatable;
3173 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3174
3175 if (!relocatable && symcount > 1)
3176 {
3177 long j;
3178 /* Trim duplicate syms, since we may have merged the normal and
3179 dynamic symbols. Actually, we only care about syms that have
3180 different values, so trim any with the same value. */
3181 for (i = 1, j = 1; i < symcount; ++i)
3182 if (syms[i - 1]->value + syms[i - 1]->section->vma
3183 != syms[i]->value + syms[i]->section->vma)
3184 syms[j++] = syms[i];
3185 symcount = j;
3186 }
3187
3188 i = 0;
3189 if (strcmp (syms[i]->section->name, ".opd") == 0)
3190 ++i;
3191 codesecsym = i;
3192
3193 for (; i < symcount; ++i)
3194 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3195 != (SEC_CODE | SEC_ALLOC))
3196 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3197 break;
3198 codesecsymend = i;
3199
3200 for (; i < symcount; ++i)
3201 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3202 break;
3203 secsymend = i;
3204
3205 for (; i < symcount; ++i)
3206 if (strcmp (syms[i]->section->name, ".opd") != 0)
3207 break;
3208 opdsymend = i;
3209
3210 for (; i < symcount; ++i)
3211 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3212 != (SEC_CODE | SEC_ALLOC))
3213 break;
3214 symcount = i;
3215
3216 count = 0;
3217
3218 if (relocatable)
3219 {
3220 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3221 arelent *r;
3222 size_t size;
3223 long relcount;
3224
3225 if (opdsymend == secsymend)
3226 goto done;
3227
3228 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3229 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3230 if (relcount == 0)
3231 goto done;
3232
3233 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3234 {
3235 count = -1;
3236 goto done;
3237 }
3238
3239 size = 0;
3240 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3241 {
3242 asymbol *sym;
3243
3244 while (r < opd->relocation + relcount
3245 && r->address < syms[i]->value + opd->vma)
3246 ++r;
3247
3248 if (r == opd->relocation + relcount)
3249 break;
3250
3251 if (r->address != syms[i]->value + opd->vma)
3252 continue;
3253
3254 if (r->howto->type != R_PPC64_ADDR64)
3255 continue;
3256
3257 sym = *r->sym_ptr_ptr;
3258 if (!sym_exists_at (syms, opdsymend, symcount,
3259 sym->section->id, sym->value + r->addend))
3260 {
3261 ++count;
3262 size += sizeof (asymbol);
3263 size += strlen (syms[i]->name) + 2;
3264 }
3265 }
3266
3267 s = *ret = bfd_malloc (size);
3268 if (s == NULL)
3269 {
3270 count = -1;
3271 goto done;
3272 }
3273
3274 names = (char *) (s + count);
3275
3276 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3277 {
3278 asymbol *sym;
3279
3280 while (r < opd->relocation + relcount
3281 && r->address < syms[i]->value + opd->vma)
3282 ++r;
3283
3284 if (r == opd->relocation + relcount)
3285 break;
3286
3287 if (r->address != syms[i]->value + opd->vma)
3288 continue;
3289
3290 if (r->howto->type != R_PPC64_ADDR64)
3291 continue;
3292
3293 sym = *r->sym_ptr_ptr;
3294 if (!sym_exists_at (syms, opdsymend, symcount,
3295 sym->section->id, sym->value + r->addend))
3296 {
3297 size_t len;
3298
3299 *s = *syms[i];
3300 s->flags |= BSF_SYNTHETIC;
3301 s->section = sym->section;
3302 s->value = sym->value + r->addend;
3303 s->name = names;
3304 *names++ = '.';
3305 len = strlen (syms[i]->name);
3306 memcpy (names, syms[i]->name, len + 1);
3307 names += len + 1;
3308 /* Have udata.p point back to the original symbol this
3309 synthetic symbol was derived from. */
3310 s->udata.p = syms[i];
3311 s++;
3312 }
3313 }
3314 }
3315 else
3316 {
3317 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3318 bfd_byte *contents = NULL;
3319 size_t size;
3320 long plt_count = 0;
3321 bfd_vma glink_vma = 0, resolv_vma = 0;
3322 asection *dynamic, *glink = NULL, *relplt = NULL;
3323 arelent *p;
3324
3325 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3326 {
3327 free_contents_and_exit:
3328 if (contents)
3329 free (contents);
3330 count = -1;
3331 goto done;
3332 }
3333
3334 size = 0;
3335 for (i = secsymend; i < opdsymend; ++i)
3336 {
3337 bfd_vma ent;
3338
3339 /* Ignore bogus symbols. */
3340 if (syms[i]->value > opd->size - 8)
3341 continue;
3342
3343 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3344 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3345 {
3346 ++count;
3347 size += sizeof (asymbol);
3348 size += strlen (syms[i]->name) + 2;
3349 }
3350 }
3351
3352 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3353 if (dyn_count != 0
3354 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3355 {
3356 bfd_byte *dynbuf, *extdyn, *extdynend;
3357 size_t extdynsize;
3358 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3359
3360 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3361 goto free_contents_and_exit;
3362
3363 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3364 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3365
3366 extdyn = dynbuf;
3367 extdynend = extdyn + dynamic->size;
3368 for (; extdyn < extdynend; extdyn += extdynsize)
3369 {
3370 Elf_Internal_Dyn dyn;
3371 (*swap_dyn_in) (abfd, extdyn, &dyn);
3372
3373 if (dyn.d_tag == DT_NULL)
3374 break;
3375
3376 if (dyn.d_tag == DT_PPC64_GLINK)
3377 {
3378 /* The first glink stub starts at offset 32; see
3379 comment in ppc64_elf_finish_dynamic_sections. */
3380 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3381 /* The .glink section usually does not survive the final
3382 link; search for the section (usually .text) where the
3383 glink stubs now reside. */
3384 glink = bfd_sections_find_if (abfd, section_covers_vma,
3385 &glink_vma);
3386 break;
3387 }
3388 }
3389
3390 free (dynbuf);
3391 }
3392
3393 if (glink != NULL)
3394 {
3395 /* Determine __glink trampoline by reading the relative branch
3396 from the first glink stub. */
3397 bfd_byte buf[4];
3398 unsigned int off = 0;
3399
3400 while (bfd_get_section_contents (abfd, glink, buf,
3401 glink_vma + off - glink->vma, 4))
3402 {
3403 unsigned int insn = bfd_get_32 (abfd, buf);
3404 insn ^= B_DOT;
3405 if ((insn & ~0x3fffffc) == 0)
3406 {
3407 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3408 break;
3409 }
3410 off += 4;
3411 if (off > 4)
3412 break;
3413 }
3414
3415 if (resolv_vma)
3416 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3417
3418 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3419 if (relplt != NULL)
3420 {
3421 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3422 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3423 goto free_contents_and_exit;
3424
3425 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3426 size += plt_count * sizeof (asymbol);
3427
3428 p = relplt->relocation;
3429 for (i = 0; i < plt_count; i++, p++)
3430 {
3431 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3432 if (p->addend != 0)
3433 size += sizeof ("+0x") - 1 + 16;
3434 }
3435 }
3436 }
3437
3438 s = *ret = bfd_malloc (size);
3439 if (s == NULL)
3440 goto free_contents_and_exit;
3441
3442 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3443
3444 for (i = secsymend; i < opdsymend; ++i)
3445 {
3446 bfd_vma ent;
3447
3448 if (syms[i]->value > opd->size - 8)
3449 continue;
3450
3451 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3452 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3453 {
3454 long lo, hi;
3455 size_t len;
3456 asection *sec = abfd->sections;
3457
3458 *s = *syms[i];
3459 lo = codesecsym;
3460 hi = codesecsymend;
3461 while (lo < hi)
3462 {
3463 long mid = (lo + hi) >> 1;
3464 if (syms[mid]->section->vma < ent)
3465 lo = mid + 1;
3466 else if (syms[mid]->section->vma > ent)
3467 hi = mid;
3468 else
3469 {
3470 sec = syms[mid]->section;
3471 break;
3472 }
3473 }
3474
3475 if (lo >= hi && lo > codesecsym)
3476 sec = syms[lo - 1]->section;
3477
3478 for (; sec != NULL; sec = sec->next)
3479 {
3480 if (sec->vma > ent)
3481 break;
3482 /* SEC_LOAD may not be set if SEC is from a separate debug
3483 info file. */
3484 if ((sec->flags & SEC_ALLOC) == 0)
3485 break;
3486 if ((sec->flags & SEC_CODE) != 0)
3487 s->section = sec;
3488 }
3489 s->flags |= BSF_SYNTHETIC;
3490 s->value = ent - s->section->vma;
3491 s->name = names;
3492 *names++ = '.';
3493 len = strlen (syms[i]->name);
3494 memcpy (names, syms[i]->name, len + 1);
3495 names += len + 1;
3496 /* Have udata.p point back to the original symbol this
3497 synthetic symbol was derived from. */
3498 s->udata.p = syms[i];
3499 s++;
3500 }
3501 }
3502 free (contents);
3503
3504 if (glink != NULL && relplt != NULL)
3505 {
3506 if (resolv_vma)
3507 {
3508 /* Add a symbol for the main glink trampoline. */
3509 memset (s, 0, sizeof *s);
3510 s->the_bfd = abfd;
3511 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3512 s->section = glink;
3513 s->value = resolv_vma - glink->vma;
3514 s->name = names;
3515 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3516 names += sizeof ("__glink_PLTresolve");
3517 s++;
3518 count++;
3519 }
3520
3521 /* FIXME: It would be very much nicer to put sym@plt on the
3522 stub rather than on the glink branch table entry. The
3523 objdump disassembler would then use a sensible symbol
3524 name on plt calls. The difficulty in doing so is
3525 a) finding the stubs, and,
3526 b) matching stubs against plt entries, and,
3527 c) there can be multiple stubs for a given plt entry.
3528
3529 Solving (a) could be done by code scanning, but older
3530 ppc64 binaries used different stubs to current code.
3531 (b) is the tricky one since you need to known the toc
3532 pointer for at least one function that uses a pic stub to
3533 be able to calculate the plt address referenced.
3534 (c) means gdb would need to set multiple breakpoints (or
3535 find the glink branch itself) when setting breakpoints
3536 for pending shared library loads. */
3537 p = relplt->relocation;
3538 for (i = 0; i < plt_count; i++, p++)
3539 {
3540 size_t len;
3541
3542 *s = **p->sym_ptr_ptr;
3543 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3544 we are defining a symbol, ensure one of them is set. */
3545 if ((s->flags & BSF_LOCAL) == 0)
3546 s->flags |= BSF_GLOBAL;
3547 s->flags |= BSF_SYNTHETIC;
3548 s->section = glink;
3549 s->value = glink_vma - glink->vma;
3550 s->name = names;
3551 s->udata.p = NULL;
3552 len = strlen ((*p->sym_ptr_ptr)->name);
3553 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3554 names += len;
3555 if (p->addend != 0)
3556 {
3557 memcpy (names, "+0x", sizeof ("+0x") - 1);
3558 names += sizeof ("+0x") - 1;
3559 bfd_sprintf_vma (abfd, names, p->addend);
3560 names += strlen (names);
3561 }
3562 memcpy (names, "@plt", sizeof ("@plt"));
3563 names += sizeof ("@plt");
3564 s++;
3565 if (abi < 2)
3566 {
3567 glink_vma += 8;
3568 if (i >= 0x8000)
3569 glink_vma += 4;
3570 }
3571 else
3572 glink_vma += 4;
3573 }
3574 count += plt_count;
3575 }
3576 }
3577
3578 done:
3579 free (syms);
3580 return count;
3581 }
3582 \f
3583 /* The following functions are specific to the ELF linker, while
3584 functions above are used generally. Those named ppc64_elf_* are
3585 called by the main ELF linker code. They appear in this file more
3586 or less in the order in which they are called. eg.
3587 ppc64_elf_check_relocs is called early in the link process,
3588 ppc64_elf_finish_dynamic_sections is one of the last functions
3589 called.
3590
3591 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3592 functions have both a function code symbol and a function descriptor
3593 symbol. A call to foo in a relocatable object file looks like:
3594
3595 . .text
3596 . x:
3597 . bl .foo
3598 . nop
3599
3600 The function definition in another object file might be:
3601
3602 . .section .opd
3603 . foo: .quad .foo
3604 . .quad .TOC.@tocbase
3605 . .quad 0
3606 .
3607 . .text
3608 . .foo: blr
3609
3610 When the linker resolves the call during a static link, the branch
3611 unsurprisingly just goes to .foo and the .opd information is unused.
3612 If the function definition is in a shared library, things are a little
3613 different: The call goes via a plt call stub, the opd information gets
3614 copied to the plt, and the linker patches the nop.
3615
3616 . x:
3617 . bl .foo_stub
3618 . ld 2,40(1)
3619 .
3620 .
3621 . .foo_stub:
3622 . std 2,40(1) # in practice, the call stub
3623 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3624 . addi 11,11,Lfoo@toc@l # this is the general idea
3625 . ld 12,0(11)
3626 . ld 2,8(11)
3627 . mtctr 12
3628 . ld 11,16(11)
3629 . bctr
3630 .
3631 . .section .plt
3632 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3633
3634 The "reloc ()" notation is supposed to indicate that the linker emits
3635 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3636 copying.
3637
3638 What are the difficulties here? Well, firstly, the relocations
3639 examined by the linker in check_relocs are against the function code
3640 sym .foo, while the dynamic relocation in the plt is emitted against
3641 the function descriptor symbol, foo. Somewhere along the line, we need
3642 to carefully copy dynamic link information from one symbol to the other.
3643 Secondly, the generic part of the elf linker will make .foo a dynamic
3644 symbol as is normal for most other backends. We need foo dynamic
3645 instead, at least for an application final link. However, when
3646 creating a shared library containing foo, we need to have both symbols
3647 dynamic so that references to .foo are satisfied during the early
3648 stages of linking. Otherwise the linker might decide to pull in a
3649 definition from some other object, eg. a static library.
3650
3651 Update: As of August 2004, we support a new convention. Function
3652 calls may use the function descriptor symbol, ie. "bl foo". This
3653 behaves exactly as "bl .foo". */
3654
3655 /* Of those relocs that might be copied as dynamic relocs, this function
3656 selects those that must be copied when linking a shared library,
3657 even when the symbol is local. */
3658
3659 static int
3660 must_be_dyn_reloc (struct bfd_link_info *info,
3661 enum elf_ppc64_reloc_type r_type)
3662 {
3663 switch (r_type)
3664 {
3665 default:
3666 return 1;
3667
3668 case R_PPC64_REL32:
3669 case R_PPC64_REL64:
3670 case R_PPC64_REL30:
3671 return 0;
3672
3673 case R_PPC64_TPREL16:
3674 case R_PPC64_TPREL16_LO:
3675 case R_PPC64_TPREL16_HI:
3676 case R_PPC64_TPREL16_HA:
3677 case R_PPC64_TPREL16_DS:
3678 case R_PPC64_TPREL16_LO_DS:
3679 case R_PPC64_TPREL16_HIGH:
3680 case R_PPC64_TPREL16_HIGHA:
3681 case R_PPC64_TPREL16_HIGHER:
3682 case R_PPC64_TPREL16_HIGHERA:
3683 case R_PPC64_TPREL16_HIGHEST:
3684 case R_PPC64_TPREL16_HIGHESTA:
3685 case R_PPC64_TPREL64:
3686 return !info->executable;
3687 }
3688 }
3689
3690 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3691 copying dynamic variables from a shared lib into an app's dynbss
3692 section, and instead use a dynamic relocation to point into the
3693 shared lib. With code that gcc generates, it's vital that this be
3694 enabled; In the PowerPC64 ABI, the address of a function is actually
3695 the address of a function descriptor, which resides in the .opd
3696 section. gcc uses the descriptor directly rather than going via the
3697 GOT as some other ABI's do, which means that initialized function
3698 pointers must reference the descriptor. Thus, a function pointer
3699 initialized to the address of a function in a shared library will
3700 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3701 redefines the function descriptor symbol to point to the copy. This
3702 presents a problem as a plt entry for that function is also
3703 initialized from the function descriptor symbol and the copy reloc
3704 may not be initialized first. */
3705 #define ELIMINATE_COPY_RELOCS 1
3706
3707 /* Section name for stubs is the associated section name plus this
3708 string. */
3709 #define STUB_SUFFIX ".stub"
3710
3711 /* Linker stubs.
3712 ppc_stub_long_branch:
3713 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3714 destination, but a 24 bit branch in a stub section will reach.
3715 . b dest
3716
3717 ppc_stub_plt_branch:
3718 Similar to the above, but a 24 bit branch in the stub section won't
3719 reach its destination.
3720 . addis %r11,%r2,xxx@toc@ha
3721 . ld %r12,xxx@toc@l(%r11)
3722 . mtctr %r12
3723 . bctr
3724
3725 ppc_stub_plt_call:
3726 Used to call a function in a shared library. If it so happens that
3727 the plt entry referenced crosses a 64k boundary, then an extra
3728 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3729 . std %r2,40(%r1)
3730 . addis %r11,%r2,xxx@toc@ha
3731 . ld %r12,xxx+0@toc@l(%r11)
3732 . mtctr %r12
3733 . ld %r2,xxx+8@toc@l(%r11)
3734 . ld %r11,xxx+16@toc@l(%r11)
3735 . bctr
3736
3737 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3738 code to adjust the value and save r2 to support multiple toc sections.
3739 A ppc_stub_long_branch with an r2 offset looks like:
3740 . std %r2,40(%r1)
3741 . addis %r2,%r2,off@ha
3742 . addi %r2,%r2,off@l
3743 . b dest
3744
3745 A ppc_stub_plt_branch with an r2 offset looks like:
3746 . std %r2,40(%r1)
3747 . addis %r11,%r2,xxx@toc@ha
3748 . ld %r12,xxx@toc@l(%r11)
3749 . addis %r2,%r2,off@ha
3750 . addi %r2,%r2,off@l
3751 . mtctr %r12
3752 . bctr
3753
3754 In cases where the "addis" instruction would add zero, the "addis" is
3755 omitted and following instructions modified slightly in some cases.
3756 */
3757
3758 enum ppc_stub_type {
3759 ppc_stub_none,
3760 ppc_stub_long_branch,
3761 ppc_stub_long_branch_r2off,
3762 ppc_stub_plt_branch,
3763 ppc_stub_plt_branch_r2off,
3764 ppc_stub_plt_call,
3765 ppc_stub_plt_call_r2save
3766 };
3767
3768 struct ppc_stub_hash_entry {
3769
3770 /* Base hash table entry structure. */
3771 struct bfd_hash_entry root;
3772
3773 enum ppc_stub_type stub_type;
3774
3775 /* The stub section. */
3776 asection *stub_sec;
3777
3778 /* Offset within stub_sec of the beginning of this stub. */
3779 bfd_vma stub_offset;
3780
3781 /* Given the symbol's value and its section we can determine its final
3782 value when building the stubs (so the stub knows where to jump. */
3783 bfd_vma target_value;
3784 asection *target_section;
3785
3786 /* The symbol table entry, if any, that this was derived from. */
3787 struct ppc_link_hash_entry *h;
3788 struct plt_entry *plt_ent;
3789
3790 /* Where this stub is being called from, or, in the case of combined
3791 stub sections, the first input section in the group. */
3792 asection *id_sec;
3793
3794 /* Symbol st_other. */
3795 unsigned char other;
3796 };
3797
3798 struct ppc_branch_hash_entry {
3799
3800 /* Base hash table entry structure. */
3801 struct bfd_hash_entry root;
3802
3803 /* Offset within branch lookup table. */
3804 unsigned int offset;
3805
3806 /* Generation marker. */
3807 unsigned int iter;
3808 };
3809
3810 /* Used to track dynamic relocations for local symbols. */
3811 struct ppc_dyn_relocs
3812 {
3813 struct ppc_dyn_relocs *next;
3814
3815 /* The input section of the reloc. */
3816 asection *sec;
3817
3818 /* Total number of relocs copied for the input section. */
3819 unsigned int count : 31;
3820
3821 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3822 unsigned int ifunc : 1;
3823 };
3824
3825 struct ppc_link_hash_entry
3826 {
3827 struct elf_link_hash_entry elf;
3828
3829 union {
3830 /* A pointer to the most recently used stub hash entry against this
3831 symbol. */
3832 struct ppc_stub_hash_entry *stub_cache;
3833
3834 /* A pointer to the next symbol starting with a '.' */
3835 struct ppc_link_hash_entry *next_dot_sym;
3836 } u;
3837
3838 /* Track dynamic relocs copied for this symbol. */
3839 struct elf_dyn_relocs *dyn_relocs;
3840
3841 /* Link between function code and descriptor symbols. */
3842 struct ppc_link_hash_entry *oh;
3843
3844 /* Flag function code and descriptor symbols. */
3845 unsigned int is_func:1;
3846 unsigned int is_func_descriptor:1;
3847 unsigned int fake:1;
3848
3849 /* Whether global opd/toc sym has been adjusted or not.
3850 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3851 should be set for all globals defined in any opd/toc section. */
3852 unsigned int adjust_done:1;
3853
3854 /* Set if we twiddled this symbol to weak at some stage. */
3855 unsigned int was_undefined:1;
3856
3857 /* Contexts in which symbol is used in the GOT (or TOC).
3858 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3859 corresponding relocs are encountered during check_relocs.
3860 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3861 indicate the corresponding GOT entry type is not needed.
3862 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3863 a TPREL one. We use a separate flag rather than setting TPREL
3864 just for convenience in distinguishing the two cases. */
3865 #define TLS_GD 1 /* GD reloc. */
3866 #define TLS_LD 2 /* LD reloc. */
3867 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3868 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3869 #define TLS_TLS 16 /* Any TLS reloc. */
3870 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3871 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3872 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3873 unsigned char tls_mask;
3874 };
3875
3876 /* ppc64 ELF linker hash table. */
3877
3878 struct ppc_link_hash_table
3879 {
3880 struct elf_link_hash_table elf;
3881
3882 /* The stub hash table. */
3883 struct bfd_hash_table stub_hash_table;
3884
3885 /* Another hash table for plt_branch stubs. */
3886 struct bfd_hash_table branch_hash_table;
3887
3888 /* Hash table for function prologue tocsave. */
3889 htab_t tocsave_htab;
3890
3891 /* Various options and other info passed from the linker. */
3892 struct ppc64_elf_params *params;
3893
3894 /* Array to keep track of which stub sections have been created, and
3895 information on stub grouping. */
3896 struct map_stub {
3897 /* This is the section to which stubs in the group will be attached. */
3898 asection *link_sec;
3899 /* The stub section. */
3900 asection *stub_sec;
3901 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3902 bfd_vma toc_off;
3903 } *stub_group;
3904
3905 /* Temp used when calculating TOC pointers. */
3906 bfd_vma toc_curr;
3907 bfd *toc_bfd;
3908 asection *toc_first_sec;
3909
3910 /* Highest input section id. */
3911 int top_id;
3912
3913 /* Highest output section index. */
3914 int top_index;
3915
3916 /* Used when adding symbols. */
3917 struct ppc_link_hash_entry *dot_syms;
3918
3919 /* List of input sections for each output section. */
3920 asection **input_list;
3921
3922 /* Shortcuts to get to dynamic linker sections. */
3923 asection *dynbss;
3924 asection *relbss;
3925 asection *glink;
3926 asection *sfpr;
3927 asection *brlt;
3928 asection *relbrlt;
3929 asection *glink_eh_frame;
3930
3931 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3932 struct ppc_link_hash_entry *tls_get_addr;
3933 struct ppc_link_hash_entry *tls_get_addr_fd;
3934
3935 /* The size of reliplt used by got entry relocs. */
3936 bfd_size_type got_reli_size;
3937
3938 /* Statistics. */
3939 unsigned long stub_count[ppc_stub_plt_call_r2save];
3940
3941 /* Number of stubs against global syms. */
3942 unsigned long stub_globals;
3943
3944 /* Set if we're linking code with function descriptors. */
3945 unsigned int opd_abi:1;
3946
3947 /* Support for multiple toc sections. */
3948 unsigned int do_multi_toc:1;
3949 unsigned int multi_toc_needed:1;
3950 unsigned int second_toc_pass:1;
3951 unsigned int do_toc_opt:1;
3952
3953 /* Set on error. */
3954 unsigned int stub_error:1;
3955
3956 /* Temp used by ppc64_elf_before_check_relocs. */
3957 unsigned int twiddled_syms:1;
3958
3959 /* Incremented every time we size stubs. */
3960 unsigned int stub_iteration;
3961
3962 /* Small local sym cache. */
3963 struct sym_cache sym_cache;
3964 };
3965
3966 /* Rename some of the generic section flags to better document how they
3967 are used here. */
3968
3969 /* Nonzero if this section has TLS related relocations. */
3970 #define has_tls_reloc sec_flg0
3971
3972 /* Nonzero if this section has a call to __tls_get_addr. */
3973 #define has_tls_get_addr_call sec_flg1
3974
3975 /* Nonzero if this section has any toc or got relocs. */
3976 #define has_toc_reloc sec_flg2
3977
3978 /* Nonzero if this section has a call to another section that uses
3979 the toc or got. */
3980 #define makes_toc_func_call sec_flg3
3981
3982 /* Recursion protection when determining above flag. */
3983 #define call_check_in_progress sec_flg4
3984 #define call_check_done sec_flg5
3985
3986 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3987
3988 #define ppc_hash_table(p) \
3989 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3990 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3991
3992 #define ppc_stub_hash_lookup(table, string, create, copy) \
3993 ((struct ppc_stub_hash_entry *) \
3994 bfd_hash_lookup ((table), (string), (create), (copy)))
3995
3996 #define ppc_branch_hash_lookup(table, string, create, copy) \
3997 ((struct ppc_branch_hash_entry *) \
3998 bfd_hash_lookup ((table), (string), (create), (copy)))
3999
4000 /* Create an entry in the stub hash table. */
4001
4002 static struct bfd_hash_entry *
4003 stub_hash_newfunc (struct bfd_hash_entry *entry,
4004 struct bfd_hash_table *table,
4005 const char *string)
4006 {
4007 /* Allocate the structure if it has not already been allocated by a
4008 subclass. */
4009 if (entry == NULL)
4010 {
4011 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4012 if (entry == NULL)
4013 return entry;
4014 }
4015
4016 /* Call the allocation method of the superclass. */
4017 entry = bfd_hash_newfunc (entry, table, string);
4018 if (entry != NULL)
4019 {
4020 struct ppc_stub_hash_entry *eh;
4021
4022 /* Initialize the local fields. */
4023 eh = (struct ppc_stub_hash_entry *) entry;
4024 eh->stub_type = ppc_stub_none;
4025 eh->stub_sec = NULL;
4026 eh->stub_offset = 0;
4027 eh->target_value = 0;
4028 eh->target_section = NULL;
4029 eh->h = NULL;
4030 eh->plt_ent = NULL;
4031 eh->id_sec = NULL;
4032 eh->other = 0;
4033 }
4034
4035 return entry;
4036 }
4037
4038 /* Create an entry in the branch hash table. */
4039
4040 static struct bfd_hash_entry *
4041 branch_hash_newfunc (struct bfd_hash_entry *entry,
4042 struct bfd_hash_table *table,
4043 const char *string)
4044 {
4045 /* Allocate the structure if it has not already been allocated by a
4046 subclass. */
4047 if (entry == NULL)
4048 {
4049 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4050 if (entry == NULL)
4051 return entry;
4052 }
4053
4054 /* Call the allocation method of the superclass. */
4055 entry = bfd_hash_newfunc (entry, table, string);
4056 if (entry != NULL)
4057 {
4058 struct ppc_branch_hash_entry *eh;
4059
4060 /* Initialize the local fields. */
4061 eh = (struct ppc_branch_hash_entry *) entry;
4062 eh->offset = 0;
4063 eh->iter = 0;
4064 }
4065
4066 return entry;
4067 }
4068
4069 /* Create an entry in a ppc64 ELF linker hash table. */
4070
4071 static struct bfd_hash_entry *
4072 link_hash_newfunc (struct bfd_hash_entry *entry,
4073 struct bfd_hash_table *table,
4074 const char *string)
4075 {
4076 /* Allocate the structure if it has not already been allocated by a
4077 subclass. */
4078 if (entry == NULL)
4079 {
4080 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4081 if (entry == NULL)
4082 return entry;
4083 }
4084
4085 /* Call the allocation method of the superclass. */
4086 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4087 if (entry != NULL)
4088 {
4089 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4090
4091 memset (&eh->u.stub_cache, 0,
4092 (sizeof (struct ppc_link_hash_entry)
4093 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4094
4095 /* When making function calls, old ABI code references function entry
4096 points (dot symbols), while new ABI code references the function
4097 descriptor symbol. We need to make any combination of reference and
4098 definition work together, without breaking archive linking.
4099
4100 For a defined function "foo" and an undefined call to "bar":
4101 An old object defines "foo" and ".foo", references ".bar" (possibly
4102 "bar" too).
4103 A new object defines "foo" and references "bar".
4104
4105 A new object thus has no problem with its undefined symbols being
4106 satisfied by definitions in an old object. On the other hand, the
4107 old object won't have ".bar" satisfied by a new object.
4108
4109 Keep a list of newly added dot-symbols. */
4110
4111 if (string[0] == '.')
4112 {
4113 struct ppc_link_hash_table *htab;
4114
4115 htab = (struct ppc_link_hash_table *) table;
4116 eh->u.next_dot_sym = htab->dot_syms;
4117 htab->dot_syms = eh;
4118 }
4119 }
4120
4121 return entry;
4122 }
4123
4124 struct tocsave_entry {
4125 asection *sec;
4126 bfd_vma offset;
4127 };
4128
4129 static hashval_t
4130 tocsave_htab_hash (const void *p)
4131 {
4132 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4133 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4134 }
4135
4136 static int
4137 tocsave_htab_eq (const void *p1, const void *p2)
4138 {
4139 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4140 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4141 return e1->sec == e2->sec && e1->offset == e2->offset;
4142 }
4143
4144 /* Destroy a ppc64 ELF linker hash table. */
4145
4146 static void
4147 ppc64_elf_link_hash_table_free (bfd *obfd)
4148 {
4149 struct ppc_link_hash_table *htab;
4150
4151 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4152 if (htab->tocsave_htab)
4153 htab_delete (htab->tocsave_htab);
4154 bfd_hash_table_free (&htab->branch_hash_table);
4155 bfd_hash_table_free (&htab->stub_hash_table);
4156 _bfd_elf_link_hash_table_free (obfd);
4157 }
4158
4159 /* Create a ppc64 ELF linker hash table. */
4160
4161 static struct bfd_link_hash_table *
4162 ppc64_elf_link_hash_table_create (bfd *abfd)
4163 {
4164 struct ppc_link_hash_table *htab;
4165 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4166
4167 htab = bfd_zmalloc (amt);
4168 if (htab == NULL)
4169 return NULL;
4170
4171 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4172 sizeof (struct ppc_link_hash_entry),
4173 PPC64_ELF_DATA))
4174 {
4175 free (htab);
4176 return NULL;
4177 }
4178
4179 /* Init the stub hash table too. */
4180 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4181 sizeof (struct ppc_stub_hash_entry)))
4182 {
4183 _bfd_elf_link_hash_table_free (abfd);
4184 return NULL;
4185 }
4186
4187 /* And the branch hash table. */
4188 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4189 sizeof (struct ppc_branch_hash_entry)))
4190 {
4191 bfd_hash_table_free (&htab->stub_hash_table);
4192 _bfd_elf_link_hash_table_free (abfd);
4193 return NULL;
4194 }
4195
4196 htab->tocsave_htab = htab_try_create (1024,
4197 tocsave_htab_hash,
4198 tocsave_htab_eq,
4199 NULL);
4200 if (htab->tocsave_htab == NULL)
4201 {
4202 ppc64_elf_link_hash_table_free (abfd);
4203 return NULL;
4204 }
4205 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4206
4207 /* Initializing two fields of the union is just cosmetic. We really
4208 only care about glist, but when compiled on a 32-bit host the
4209 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4210 debugger inspection of these fields look nicer. */
4211 htab->elf.init_got_refcount.refcount = 0;
4212 htab->elf.init_got_refcount.glist = NULL;
4213 htab->elf.init_plt_refcount.refcount = 0;
4214 htab->elf.init_plt_refcount.glist = NULL;
4215 htab->elf.init_got_offset.offset = 0;
4216 htab->elf.init_got_offset.glist = NULL;
4217 htab->elf.init_plt_offset.offset = 0;
4218 htab->elf.init_plt_offset.glist = NULL;
4219
4220 return &htab->elf.root;
4221 }
4222
4223 /* Create sections for linker generated code. */
4224
4225 static bfd_boolean
4226 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4227 {
4228 struct ppc_link_hash_table *htab;
4229 flagword flags;
4230
4231 htab = ppc_hash_table (info);
4232
4233 /* Create .sfpr for code to save and restore fp regs. */
4234 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4235 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4236 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4237 flags);
4238 if (htab->sfpr == NULL
4239 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4240 return FALSE;
4241
4242 /* Create .glink for lazy dynamic linking support. */
4243 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4244 flags);
4245 if (htab->glink == NULL
4246 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4247 return FALSE;
4248
4249 if (!info->no_ld_generated_unwind_info)
4250 {
4251 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4252 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4253 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4254 ".eh_frame",
4255 flags);
4256 if (htab->glink_eh_frame == NULL
4257 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4258 return FALSE;
4259 }
4260
4261 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4262 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4263 if (htab->elf.iplt == NULL
4264 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4265 return FALSE;
4266
4267 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4268 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4269 htab->elf.irelplt
4270 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4271 if (htab->elf.irelplt == NULL
4272 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4273 return FALSE;
4274
4275 /* Create branch lookup table for plt_branch stubs. */
4276 flags = (SEC_ALLOC | SEC_LOAD
4277 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4278 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4279 flags);
4280 if (htab->brlt == NULL
4281 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4282 return FALSE;
4283
4284 if (!info->shared)
4285 return TRUE;
4286
4287 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4288 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4289 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4290 ".rela.branch_lt",
4291 flags);
4292 if (htab->relbrlt == NULL
4293 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4294 return FALSE;
4295
4296 return TRUE;
4297 }
4298
4299 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4300
4301 bfd_boolean
4302 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4303 struct ppc64_elf_params *params)
4304 {
4305 struct ppc_link_hash_table *htab;
4306
4307 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4308
4309 /* Always hook our dynamic sections into the first bfd, which is the
4310 linker created stub bfd. This ensures that the GOT header is at
4311 the start of the output TOC section. */
4312 htab = ppc_hash_table (info);
4313 if (htab == NULL)
4314 return FALSE;
4315 htab->elf.dynobj = params->stub_bfd;
4316 htab->params = params;
4317
4318 if (info->relocatable)
4319 return TRUE;
4320
4321 return create_linkage_sections (htab->elf.dynobj, info);
4322 }
4323
4324 /* Build a name for an entry in the stub hash table. */
4325
4326 static char *
4327 ppc_stub_name (const asection *input_section,
4328 const asection *sym_sec,
4329 const struct ppc_link_hash_entry *h,
4330 const Elf_Internal_Rela *rel)
4331 {
4332 char *stub_name;
4333 ssize_t len;
4334
4335 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4336 offsets from a sym as a branch target? In fact, we could
4337 probably assume the addend is always zero. */
4338 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4339
4340 if (h)
4341 {
4342 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4343 stub_name = bfd_malloc (len);
4344 if (stub_name == NULL)
4345 return stub_name;
4346
4347 len = sprintf (stub_name, "%08x.%s+%x",
4348 input_section->id & 0xffffffff,
4349 h->elf.root.root.string,
4350 (int) rel->r_addend & 0xffffffff);
4351 }
4352 else
4353 {
4354 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4355 stub_name = bfd_malloc (len);
4356 if (stub_name == NULL)
4357 return stub_name;
4358
4359 len = sprintf (stub_name, "%08x.%x:%x+%x",
4360 input_section->id & 0xffffffff,
4361 sym_sec->id & 0xffffffff,
4362 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4363 (int) rel->r_addend & 0xffffffff);
4364 }
4365 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4366 stub_name[len - 2] = 0;
4367 return stub_name;
4368 }
4369
4370 /* Look up an entry in the stub hash. Stub entries are cached because
4371 creating the stub name takes a bit of time. */
4372
4373 static struct ppc_stub_hash_entry *
4374 ppc_get_stub_entry (const asection *input_section,
4375 const asection *sym_sec,
4376 struct ppc_link_hash_entry *h,
4377 const Elf_Internal_Rela *rel,
4378 struct ppc_link_hash_table *htab)
4379 {
4380 struct ppc_stub_hash_entry *stub_entry;
4381 const asection *id_sec;
4382
4383 /* If this input section is part of a group of sections sharing one
4384 stub section, then use the id of the first section in the group.
4385 Stub names need to include a section id, as there may well be
4386 more than one stub used to reach say, printf, and we need to
4387 distinguish between them. */
4388 id_sec = htab->stub_group[input_section->id].link_sec;
4389
4390 if (h != NULL && h->u.stub_cache != NULL
4391 && h->u.stub_cache->h == h
4392 && h->u.stub_cache->id_sec == id_sec)
4393 {
4394 stub_entry = h->u.stub_cache;
4395 }
4396 else
4397 {
4398 char *stub_name;
4399
4400 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4401 if (stub_name == NULL)
4402 return NULL;
4403
4404 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4405 stub_name, FALSE, FALSE);
4406 if (h != NULL)
4407 h->u.stub_cache = stub_entry;
4408
4409 free (stub_name);
4410 }
4411
4412 return stub_entry;
4413 }
4414
4415 /* Add a new stub entry to the stub hash. Not all fields of the new
4416 stub entry are initialised. */
4417
4418 static struct ppc_stub_hash_entry *
4419 ppc_add_stub (const char *stub_name,
4420 asection *section,
4421 struct bfd_link_info *info)
4422 {
4423 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4424 asection *link_sec;
4425 asection *stub_sec;
4426 struct ppc_stub_hash_entry *stub_entry;
4427
4428 link_sec = htab->stub_group[section->id].link_sec;
4429 stub_sec = htab->stub_group[section->id].stub_sec;
4430 if (stub_sec == NULL)
4431 {
4432 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4433 if (stub_sec == NULL)
4434 {
4435 size_t namelen;
4436 bfd_size_type len;
4437 char *s_name;
4438
4439 namelen = strlen (link_sec->name);
4440 len = namelen + sizeof (STUB_SUFFIX);
4441 s_name = bfd_alloc (htab->params->stub_bfd, len);
4442 if (s_name == NULL)
4443 return NULL;
4444
4445 memcpy (s_name, link_sec->name, namelen);
4446 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4447 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4448 if (stub_sec == NULL)
4449 return NULL;
4450 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4451 }
4452 htab->stub_group[section->id].stub_sec = stub_sec;
4453 }
4454
4455 /* Enter this entry into the linker stub hash table. */
4456 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4457 TRUE, FALSE);
4458 if (stub_entry == NULL)
4459 {
4460 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4461 section->owner, stub_name);
4462 return NULL;
4463 }
4464
4465 stub_entry->stub_sec = stub_sec;
4466 stub_entry->stub_offset = 0;
4467 stub_entry->id_sec = link_sec;
4468 return stub_entry;
4469 }
4470
4471 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4472 not already done. */
4473
4474 static bfd_boolean
4475 create_got_section (bfd *abfd, struct bfd_link_info *info)
4476 {
4477 asection *got, *relgot;
4478 flagword flags;
4479 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4480
4481 if (!is_ppc64_elf (abfd))
4482 return FALSE;
4483 if (htab == NULL)
4484 return FALSE;
4485
4486 if (!htab->elf.sgot
4487 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4488 return FALSE;
4489
4490 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4491 | SEC_LINKER_CREATED);
4492
4493 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4494 if (!got
4495 || !bfd_set_section_alignment (abfd, got, 3))
4496 return FALSE;
4497
4498 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4499 flags | SEC_READONLY);
4500 if (!relgot
4501 || ! bfd_set_section_alignment (abfd, relgot, 3))
4502 return FALSE;
4503
4504 ppc64_elf_tdata (abfd)->got = got;
4505 ppc64_elf_tdata (abfd)->relgot = relgot;
4506 return TRUE;
4507 }
4508
4509 /* Create the dynamic sections, and set up shortcuts. */
4510
4511 static bfd_boolean
4512 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4513 {
4514 struct ppc_link_hash_table *htab;
4515
4516 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4517 return FALSE;
4518
4519 htab = ppc_hash_table (info);
4520 if (htab == NULL)
4521 return FALSE;
4522
4523 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4524 if (!info->shared)
4525 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4526
4527 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4528 || (!info->shared && !htab->relbss))
4529 abort ();
4530
4531 return TRUE;
4532 }
4533
4534 /* Follow indirect and warning symbol links. */
4535
4536 static inline struct bfd_link_hash_entry *
4537 follow_link (struct bfd_link_hash_entry *h)
4538 {
4539 while (h->type == bfd_link_hash_indirect
4540 || h->type == bfd_link_hash_warning)
4541 h = h->u.i.link;
4542 return h;
4543 }
4544
4545 static inline struct elf_link_hash_entry *
4546 elf_follow_link (struct elf_link_hash_entry *h)
4547 {
4548 return (struct elf_link_hash_entry *) follow_link (&h->root);
4549 }
4550
4551 static inline struct ppc_link_hash_entry *
4552 ppc_follow_link (struct ppc_link_hash_entry *h)
4553 {
4554 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4555 }
4556
4557 /* Merge PLT info on FROM with that on TO. */
4558
4559 static void
4560 move_plt_plist (struct ppc_link_hash_entry *from,
4561 struct ppc_link_hash_entry *to)
4562 {
4563 if (from->elf.plt.plist != NULL)
4564 {
4565 if (to->elf.plt.plist != NULL)
4566 {
4567 struct plt_entry **entp;
4568 struct plt_entry *ent;
4569
4570 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4571 {
4572 struct plt_entry *dent;
4573
4574 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4575 if (dent->addend == ent->addend)
4576 {
4577 dent->plt.refcount += ent->plt.refcount;
4578 *entp = ent->next;
4579 break;
4580 }
4581 if (dent == NULL)
4582 entp = &ent->next;
4583 }
4584 *entp = to->elf.plt.plist;
4585 }
4586
4587 to->elf.plt.plist = from->elf.plt.plist;
4588 from->elf.plt.plist = NULL;
4589 }
4590 }
4591
4592 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4593
4594 static void
4595 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4596 struct elf_link_hash_entry *dir,
4597 struct elf_link_hash_entry *ind)
4598 {
4599 struct ppc_link_hash_entry *edir, *eind;
4600
4601 edir = (struct ppc_link_hash_entry *) dir;
4602 eind = (struct ppc_link_hash_entry *) ind;
4603
4604 edir->is_func |= eind->is_func;
4605 edir->is_func_descriptor |= eind->is_func_descriptor;
4606 edir->tls_mask |= eind->tls_mask;
4607 if (eind->oh != NULL)
4608 edir->oh = ppc_follow_link (eind->oh);
4609
4610 /* If called to transfer flags for a weakdef during processing
4611 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4612 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4613 if (!(ELIMINATE_COPY_RELOCS
4614 && eind->elf.root.type != bfd_link_hash_indirect
4615 && edir->elf.dynamic_adjusted))
4616 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4617
4618 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4619 edir->elf.ref_regular |= eind->elf.ref_regular;
4620 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4621 edir->elf.needs_plt |= eind->elf.needs_plt;
4622 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4623
4624 /* Copy over any dynamic relocs we may have on the indirect sym. */
4625 if (eind->dyn_relocs != NULL)
4626 {
4627 if (edir->dyn_relocs != NULL)
4628 {
4629 struct elf_dyn_relocs **pp;
4630 struct elf_dyn_relocs *p;
4631
4632 /* Add reloc counts against the indirect sym to the direct sym
4633 list. Merge any entries against the same section. */
4634 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4635 {
4636 struct elf_dyn_relocs *q;
4637
4638 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4639 if (q->sec == p->sec)
4640 {
4641 q->pc_count += p->pc_count;
4642 q->count += p->count;
4643 *pp = p->next;
4644 break;
4645 }
4646 if (q == NULL)
4647 pp = &p->next;
4648 }
4649 *pp = edir->dyn_relocs;
4650 }
4651
4652 edir->dyn_relocs = eind->dyn_relocs;
4653 eind->dyn_relocs = NULL;
4654 }
4655
4656 /* If we were called to copy over info for a weak sym, that's all.
4657 You might think dyn_relocs need not be copied over; After all,
4658 both syms will be dynamic or both non-dynamic so we're just
4659 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4660 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4661 dyn_relocs in read-only sections, and it does so on what is the
4662 DIR sym here. */
4663 if (eind->elf.root.type != bfd_link_hash_indirect)
4664 return;
4665
4666 /* Copy over got entries that we may have already seen to the
4667 symbol which just became indirect. */
4668 if (eind->elf.got.glist != NULL)
4669 {
4670 if (edir->elf.got.glist != NULL)
4671 {
4672 struct got_entry **entp;
4673 struct got_entry *ent;
4674
4675 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4676 {
4677 struct got_entry *dent;
4678
4679 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4680 if (dent->addend == ent->addend
4681 && dent->owner == ent->owner
4682 && dent->tls_type == ent->tls_type)
4683 {
4684 dent->got.refcount += ent->got.refcount;
4685 *entp = ent->next;
4686 break;
4687 }
4688 if (dent == NULL)
4689 entp = &ent->next;
4690 }
4691 *entp = edir->elf.got.glist;
4692 }
4693
4694 edir->elf.got.glist = eind->elf.got.glist;
4695 eind->elf.got.glist = NULL;
4696 }
4697
4698 /* And plt entries. */
4699 move_plt_plist (eind, edir);
4700
4701 if (eind->elf.dynindx != -1)
4702 {
4703 if (edir->elf.dynindx != -1)
4704 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4705 edir->elf.dynstr_index);
4706 edir->elf.dynindx = eind->elf.dynindx;
4707 edir->elf.dynstr_index = eind->elf.dynstr_index;
4708 eind->elf.dynindx = -1;
4709 eind->elf.dynstr_index = 0;
4710 }
4711 }
4712
4713 /* Find the function descriptor hash entry from the given function code
4714 hash entry FH. Link the entries via their OH fields. */
4715
4716 static struct ppc_link_hash_entry *
4717 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4718 {
4719 struct ppc_link_hash_entry *fdh = fh->oh;
4720
4721 if (fdh == NULL)
4722 {
4723 const char *fd_name = fh->elf.root.root.string + 1;
4724
4725 fdh = (struct ppc_link_hash_entry *)
4726 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4727 if (fdh == NULL)
4728 return fdh;
4729
4730 fdh->is_func_descriptor = 1;
4731 fdh->oh = fh;
4732 fh->is_func = 1;
4733 fh->oh = fdh;
4734 }
4735
4736 return ppc_follow_link (fdh);
4737 }
4738
4739 /* Make a fake function descriptor sym for the code sym FH. */
4740
4741 static struct ppc_link_hash_entry *
4742 make_fdh (struct bfd_link_info *info,
4743 struct ppc_link_hash_entry *fh)
4744 {
4745 bfd *abfd;
4746 asymbol *newsym;
4747 struct bfd_link_hash_entry *bh;
4748 struct ppc_link_hash_entry *fdh;
4749
4750 abfd = fh->elf.root.u.undef.abfd;
4751 newsym = bfd_make_empty_symbol (abfd);
4752 newsym->name = fh->elf.root.root.string + 1;
4753 newsym->section = bfd_und_section_ptr;
4754 newsym->value = 0;
4755 newsym->flags = BSF_WEAK;
4756
4757 bh = NULL;
4758 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4759 newsym->flags, newsym->section,
4760 newsym->value, NULL, FALSE, FALSE,
4761 &bh))
4762 return NULL;
4763
4764 fdh = (struct ppc_link_hash_entry *) bh;
4765 fdh->elf.non_elf = 0;
4766 fdh->fake = 1;
4767 fdh->is_func_descriptor = 1;
4768 fdh->oh = fh;
4769 fh->is_func = 1;
4770 fh->oh = fdh;
4771 return fdh;
4772 }
4773
4774 /* Fix function descriptor symbols defined in .opd sections to be
4775 function type. */
4776
4777 static bfd_boolean
4778 ppc64_elf_add_symbol_hook (bfd *ibfd,
4779 struct bfd_link_info *info,
4780 Elf_Internal_Sym *isym,
4781 const char **name,
4782 flagword *flags ATTRIBUTE_UNUSED,
4783 asection **sec,
4784 bfd_vma *value ATTRIBUTE_UNUSED)
4785 {
4786 if ((ibfd->flags & DYNAMIC) == 0
4787 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4788 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4789
4790 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4791 {
4792 if ((ibfd->flags & DYNAMIC) == 0)
4793 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4794 }
4795 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4796 ;
4797 else if (*sec != NULL
4798 && strcmp ((*sec)->name, ".opd") == 0)
4799 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4800
4801 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4802 {
4803 if (abiversion (ibfd) == 0)
4804 set_abiversion (ibfd, 2);
4805 else if (abiversion (ibfd) == 1)
4806 {
4807 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4808 " for ABI version 1\n"), name);
4809 bfd_set_error (bfd_error_bad_value);
4810 return FALSE;
4811 }
4812 }
4813
4814 return TRUE;
4815 }
4816
4817 /* Merge non-visibility st_other attributes: local entry point. */
4818
4819 static void
4820 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4821 const Elf_Internal_Sym *isym,
4822 bfd_boolean definition,
4823 bfd_boolean dynamic)
4824 {
4825 if (definition && !dynamic)
4826 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4827 | ELF_ST_VISIBILITY (h->other));
4828 }
4829
4830 /* This function makes an old ABI object reference to ".bar" cause the
4831 inclusion of a new ABI object archive that defines "bar".
4832 NAME is a symbol defined in an archive. Return a symbol in the hash
4833 table that might be satisfied by the archive symbols. */
4834
4835 static struct elf_link_hash_entry *
4836 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4837 struct bfd_link_info *info,
4838 const char *name)
4839 {
4840 struct elf_link_hash_entry *h;
4841 char *dot_name;
4842 size_t len;
4843
4844 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4845 if (h != NULL
4846 /* Don't return this sym if it is a fake function descriptor
4847 created by add_symbol_adjust. */
4848 && !(h->root.type == bfd_link_hash_undefweak
4849 && ((struct ppc_link_hash_entry *) h)->fake))
4850 return h;
4851
4852 if (name[0] == '.')
4853 return h;
4854
4855 len = strlen (name);
4856 dot_name = bfd_alloc (abfd, len + 2);
4857 if (dot_name == NULL)
4858 return (struct elf_link_hash_entry *) 0 - 1;
4859 dot_name[0] = '.';
4860 memcpy (dot_name + 1, name, len + 1);
4861 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4862 bfd_release (abfd, dot_name);
4863 return h;
4864 }
4865
4866 /* This function satisfies all old ABI object references to ".bar" if a
4867 new ABI object defines "bar". Well, at least, undefined dot symbols
4868 are made weak. This stops later archive searches from including an
4869 object if we already have a function descriptor definition. It also
4870 prevents the linker complaining about undefined symbols.
4871 We also check and correct mismatched symbol visibility here. The
4872 most restrictive visibility of the function descriptor and the
4873 function entry symbol is used. */
4874
4875 static bfd_boolean
4876 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4877 {
4878 struct ppc_link_hash_table *htab;
4879 struct ppc_link_hash_entry *fdh;
4880
4881 if (eh->elf.root.type == bfd_link_hash_indirect)
4882 return TRUE;
4883
4884 if (eh->elf.root.type == bfd_link_hash_warning)
4885 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4886
4887 if (eh->elf.root.root.string[0] != '.')
4888 abort ();
4889
4890 htab = ppc_hash_table (info);
4891 if (htab == NULL)
4892 return FALSE;
4893
4894 fdh = lookup_fdh (eh, htab);
4895 if (fdh == NULL)
4896 {
4897 if (!info->relocatable
4898 && (eh->elf.root.type == bfd_link_hash_undefined
4899 || eh->elf.root.type == bfd_link_hash_undefweak)
4900 && eh->elf.ref_regular)
4901 {
4902 /* Make an undefweak function descriptor sym, which is enough to
4903 pull in an --as-needed shared lib, but won't cause link
4904 errors. Archives are handled elsewhere. */
4905 fdh = make_fdh (info, eh);
4906 if (fdh == NULL)
4907 return FALSE;
4908 fdh->elf.ref_regular = 1;
4909 }
4910 }
4911 else
4912 {
4913 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4914 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4915 if (entry_vis < descr_vis)
4916 fdh->elf.other += entry_vis - descr_vis;
4917 else if (entry_vis > descr_vis)
4918 eh->elf.other += descr_vis - entry_vis;
4919
4920 if ((fdh->elf.root.type == bfd_link_hash_defined
4921 || fdh->elf.root.type == bfd_link_hash_defweak)
4922 && eh->elf.root.type == bfd_link_hash_undefined)
4923 {
4924 eh->elf.root.type = bfd_link_hash_undefweak;
4925 eh->was_undefined = 1;
4926 htab->twiddled_syms = 1;
4927 }
4928 }
4929
4930 return TRUE;
4931 }
4932
4933 /* Set up opd section info and abiversion for IBFD, and process list
4934 of dot-symbols we made in link_hash_newfunc. */
4935
4936 static bfd_boolean
4937 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
4938 {
4939 struct ppc_link_hash_table *htab;
4940 struct ppc_link_hash_entry **p, *eh;
4941
4942 if (!is_ppc64_elf (info->output_bfd))
4943 return TRUE;
4944 htab = ppc_hash_table (info);
4945 if (htab == NULL)
4946 return FALSE;
4947
4948 if (is_ppc64_elf (ibfd))
4949 {
4950 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
4951
4952 if (opd != NULL && opd->size != 0)
4953 {
4954 if (abiversion (ibfd) == 0)
4955 set_abiversion (ibfd, 1);
4956 else if (abiversion (ibfd) == 2)
4957 {
4958 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
4959 " version %d\n"),
4960 ibfd, abiversion (ibfd));
4961 bfd_set_error (bfd_error_bad_value);
4962 return FALSE;
4963 }
4964
4965 if ((ibfd->flags & DYNAMIC) == 0
4966 && (opd->flags & SEC_RELOC) != 0
4967 && opd->reloc_count != 0
4968 && !bfd_is_abs_section (opd->output_section))
4969 {
4970 /* Garbage collection needs some extra help with .opd sections.
4971 We don't want to necessarily keep everything referenced by
4972 relocs in .opd, as that would keep all functions. Instead,
4973 if we reference an .opd symbol (a function descriptor), we
4974 want to keep the function code symbol's section. This is
4975 easy for global symbols, but for local syms we need to keep
4976 information about the associated function section. */
4977 bfd_size_type amt;
4978 asection **opd_sym_map;
4979
4980 amt = opd->size * sizeof (*opd_sym_map) / 8;
4981 opd_sym_map = bfd_zalloc (ibfd, amt);
4982 if (opd_sym_map == NULL)
4983 return FALSE;
4984 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
4985 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
4986 ppc64_elf_section_data (opd)->sec_type = sec_opd;
4987 }
4988 }
4989
4990 /* For input files without an explicit abiversion in e_flags
4991 we should have flagged any with symbol st_other bits set
4992 as ELFv1 and above flagged those with .opd as ELFv2.
4993 Set the output abiversion if not yet set, and for any input
4994 still ambiguous, take its abiversion from the output.
4995 Differences in ABI are reported later. */
4996 if (abiversion (info->output_bfd) == 0)
4997 set_abiversion (info->output_bfd, abiversion (ibfd));
4998 else if (abiversion (ibfd) == 0)
4999 set_abiversion (ibfd, abiversion (info->output_bfd));
5000
5001 p = &htab->dot_syms;
5002 while ((eh = *p) != NULL)
5003 {
5004 *p = NULL;
5005 if (&eh->elf == htab->elf.hgot)
5006 ;
5007 else if (htab->elf.hgot == NULL
5008 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5009 htab->elf.hgot = &eh->elf;
5010 else if (!add_symbol_adjust (eh, info))
5011 return FALSE;
5012 p = &eh->u.next_dot_sym;
5013 }
5014 }
5015
5016 /* Clear the list for non-ppc64 input files. */
5017 p = &htab->dot_syms;
5018 while ((eh = *p) != NULL)
5019 {
5020 *p = NULL;
5021 p = &eh->u.next_dot_sym;
5022 }
5023
5024 /* We need to fix the undefs list for any syms we have twiddled to
5025 undef_weak. */
5026 if (htab->twiddled_syms)
5027 {
5028 bfd_link_repair_undef_list (&htab->elf.root);
5029 htab->twiddled_syms = 0;
5030 }
5031 return TRUE;
5032 }
5033
5034 /* Undo hash table changes when an --as-needed input file is determined
5035 not to be needed. */
5036
5037 static bfd_boolean
5038 ppc64_elf_notice_as_needed (bfd *ibfd,
5039 struct bfd_link_info *info,
5040 enum notice_asneeded_action act)
5041 {
5042 if (act == notice_not_needed)
5043 {
5044 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5045
5046 if (htab == NULL)
5047 return FALSE;
5048
5049 htab->dot_syms = NULL;
5050 }
5051 return _bfd_elf_notice_as_needed (ibfd, info, act);
5052 }
5053
5054 /* If --just-symbols against a final linked binary, then assume we need
5055 toc adjusting stubs when calling functions defined there. */
5056
5057 static void
5058 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5059 {
5060 if ((sec->flags & SEC_CODE) != 0
5061 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5062 && is_ppc64_elf (sec->owner))
5063 {
5064 if (abiversion (sec->owner) >= 2
5065 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5066 sec->has_toc_reloc = 1;
5067 }
5068 _bfd_elf_link_just_syms (sec, info);
5069 }
5070
5071 static struct plt_entry **
5072 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5073 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5074 {
5075 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5076 struct plt_entry **local_plt;
5077 unsigned char *local_got_tls_masks;
5078
5079 if (local_got_ents == NULL)
5080 {
5081 bfd_size_type size = symtab_hdr->sh_info;
5082
5083 size *= (sizeof (*local_got_ents)
5084 + sizeof (*local_plt)
5085 + sizeof (*local_got_tls_masks));
5086 local_got_ents = bfd_zalloc (abfd, size);
5087 if (local_got_ents == NULL)
5088 return NULL;
5089 elf_local_got_ents (abfd) = local_got_ents;
5090 }
5091
5092 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5093 {
5094 struct got_entry *ent;
5095
5096 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5097 if (ent->addend == r_addend
5098 && ent->owner == abfd
5099 && ent->tls_type == tls_type)
5100 break;
5101 if (ent == NULL)
5102 {
5103 bfd_size_type amt = sizeof (*ent);
5104 ent = bfd_alloc (abfd, amt);
5105 if (ent == NULL)
5106 return FALSE;
5107 ent->next = local_got_ents[r_symndx];
5108 ent->addend = r_addend;
5109 ent->owner = abfd;
5110 ent->tls_type = tls_type;
5111 ent->is_indirect = FALSE;
5112 ent->got.refcount = 0;
5113 local_got_ents[r_symndx] = ent;
5114 }
5115 ent->got.refcount += 1;
5116 }
5117
5118 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5119 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5120 local_got_tls_masks[r_symndx] |= tls_type;
5121
5122 return local_plt + r_symndx;
5123 }
5124
5125 static bfd_boolean
5126 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5127 {
5128 struct plt_entry *ent;
5129
5130 for (ent = *plist; ent != NULL; ent = ent->next)
5131 if (ent->addend == addend)
5132 break;
5133 if (ent == NULL)
5134 {
5135 bfd_size_type amt = sizeof (*ent);
5136 ent = bfd_alloc (abfd, amt);
5137 if (ent == NULL)
5138 return FALSE;
5139 ent->next = *plist;
5140 ent->addend = addend;
5141 ent->plt.refcount = 0;
5142 *plist = ent;
5143 }
5144 ent->plt.refcount += 1;
5145 return TRUE;
5146 }
5147
5148 static bfd_boolean
5149 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5150 {
5151 return (r_type == R_PPC64_REL24
5152 || r_type == R_PPC64_REL14
5153 || r_type == R_PPC64_REL14_BRTAKEN
5154 || r_type == R_PPC64_REL14_BRNTAKEN
5155 || r_type == R_PPC64_ADDR24
5156 || r_type == R_PPC64_ADDR14
5157 || r_type == R_PPC64_ADDR14_BRTAKEN
5158 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5159 }
5160
5161 /* Look through the relocs for a section during the first phase, and
5162 calculate needed space in the global offset table, procedure
5163 linkage table, and dynamic reloc sections. */
5164
5165 static bfd_boolean
5166 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5167 asection *sec, const Elf_Internal_Rela *relocs)
5168 {
5169 struct ppc_link_hash_table *htab;
5170 Elf_Internal_Shdr *symtab_hdr;
5171 struct elf_link_hash_entry **sym_hashes;
5172 const Elf_Internal_Rela *rel;
5173 const Elf_Internal_Rela *rel_end;
5174 asection *sreloc;
5175 asection **opd_sym_map;
5176 struct elf_link_hash_entry *tga, *dottga;
5177
5178 if (info->relocatable)
5179 return TRUE;
5180
5181 /* Don't do anything special with non-loaded, non-alloced sections.
5182 In particular, any relocs in such sections should not affect GOT
5183 and PLT reference counting (ie. we don't allow them to create GOT
5184 or PLT entries), there's no possibility or desire to optimize TLS
5185 relocs, and there's not much point in propagating relocs to shared
5186 libs that the dynamic linker won't relocate. */
5187 if ((sec->flags & SEC_ALLOC) == 0)
5188 return TRUE;
5189
5190 BFD_ASSERT (is_ppc64_elf (abfd));
5191
5192 htab = ppc_hash_table (info);
5193 if (htab == NULL)
5194 return FALSE;
5195
5196 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5197 FALSE, FALSE, TRUE);
5198 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5199 FALSE, FALSE, TRUE);
5200 symtab_hdr = &elf_symtab_hdr (abfd);
5201 sym_hashes = elf_sym_hashes (abfd);
5202 sreloc = NULL;
5203 opd_sym_map = NULL;
5204 if (ppc64_elf_section_data (sec) != NULL
5205 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5206 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5207
5208 rel_end = relocs + sec->reloc_count;
5209 for (rel = relocs; rel < rel_end; rel++)
5210 {
5211 unsigned long r_symndx;
5212 struct elf_link_hash_entry *h;
5213 enum elf_ppc64_reloc_type r_type;
5214 int tls_type;
5215 struct _ppc64_elf_section_data *ppc64_sec;
5216 struct plt_entry **ifunc;
5217
5218 r_symndx = ELF64_R_SYM (rel->r_info);
5219 if (r_symndx < symtab_hdr->sh_info)
5220 h = NULL;
5221 else
5222 {
5223 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5224 h = elf_follow_link (h);
5225
5226 /* PR15323, ref flags aren't set for references in the same
5227 object. */
5228 h->root.non_ir_ref = 1;
5229
5230 if (h == htab->elf.hgot)
5231 sec->has_toc_reloc = 1;
5232 }
5233
5234 tls_type = 0;
5235 ifunc = NULL;
5236 if (h != NULL)
5237 {
5238 if (h->type == STT_GNU_IFUNC)
5239 {
5240 h->needs_plt = 1;
5241 ifunc = &h->plt.plist;
5242 }
5243 }
5244 else
5245 {
5246 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5247 abfd, r_symndx);
5248 if (isym == NULL)
5249 return FALSE;
5250
5251 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5252 {
5253 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5254 rel->r_addend, PLT_IFUNC);
5255 if (ifunc == NULL)
5256 return FALSE;
5257 }
5258 }
5259 r_type = ELF64_R_TYPE (rel->r_info);
5260 if (is_branch_reloc (r_type))
5261 {
5262 if (h != NULL && (h == tga || h == dottga))
5263 {
5264 if (rel != relocs
5265 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5266 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5267 /* We have a new-style __tls_get_addr call with a marker
5268 reloc. */
5269 ;
5270 else
5271 /* Mark this section as having an old-style call. */
5272 sec->has_tls_get_addr_call = 1;
5273 }
5274
5275 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5276 if (ifunc != NULL
5277 && !update_plt_info (abfd, ifunc, rel->r_addend))
5278 return FALSE;
5279 }
5280
5281 switch (r_type)
5282 {
5283 case R_PPC64_TLSGD:
5284 case R_PPC64_TLSLD:
5285 /* These special tls relocs tie a call to __tls_get_addr with
5286 its parameter symbol. */
5287 break;
5288
5289 case R_PPC64_GOT_TLSLD16:
5290 case R_PPC64_GOT_TLSLD16_LO:
5291 case R_PPC64_GOT_TLSLD16_HI:
5292 case R_PPC64_GOT_TLSLD16_HA:
5293 tls_type = TLS_TLS | TLS_LD;
5294 goto dogottls;
5295
5296 case R_PPC64_GOT_TLSGD16:
5297 case R_PPC64_GOT_TLSGD16_LO:
5298 case R_PPC64_GOT_TLSGD16_HI:
5299 case R_PPC64_GOT_TLSGD16_HA:
5300 tls_type = TLS_TLS | TLS_GD;
5301 goto dogottls;
5302
5303 case R_PPC64_GOT_TPREL16_DS:
5304 case R_PPC64_GOT_TPREL16_LO_DS:
5305 case R_PPC64_GOT_TPREL16_HI:
5306 case R_PPC64_GOT_TPREL16_HA:
5307 if (!info->executable)
5308 info->flags |= DF_STATIC_TLS;
5309 tls_type = TLS_TLS | TLS_TPREL;
5310 goto dogottls;
5311
5312 case R_PPC64_GOT_DTPREL16_DS:
5313 case R_PPC64_GOT_DTPREL16_LO_DS:
5314 case R_PPC64_GOT_DTPREL16_HI:
5315 case R_PPC64_GOT_DTPREL16_HA:
5316 tls_type = TLS_TLS | TLS_DTPREL;
5317 dogottls:
5318 sec->has_tls_reloc = 1;
5319 /* Fall thru */
5320
5321 case R_PPC64_GOT16:
5322 case R_PPC64_GOT16_DS:
5323 case R_PPC64_GOT16_HA:
5324 case R_PPC64_GOT16_HI:
5325 case R_PPC64_GOT16_LO:
5326 case R_PPC64_GOT16_LO_DS:
5327 /* This symbol requires a global offset table entry. */
5328 sec->has_toc_reloc = 1;
5329 if (r_type == R_PPC64_GOT_TLSLD16
5330 || r_type == R_PPC64_GOT_TLSGD16
5331 || r_type == R_PPC64_GOT_TPREL16_DS
5332 || r_type == R_PPC64_GOT_DTPREL16_DS
5333 || r_type == R_PPC64_GOT16
5334 || r_type == R_PPC64_GOT16_DS)
5335 {
5336 htab->do_multi_toc = 1;
5337 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5338 }
5339
5340 if (ppc64_elf_tdata (abfd)->got == NULL
5341 && !create_got_section (abfd, info))
5342 return FALSE;
5343
5344 if (h != NULL)
5345 {
5346 struct ppc_link_hash_entry *eh;
5347 struct got_entry *ent;
5348
5349 eh = (struct ppc_link_hash_entry *) h;
5350 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5351 if (ent->addend == rel->r_addend
5352 && ent->owner == abfd
5353 && ent->tls_type == tls_type)
5354 break;
5355 if (ent == NULL)
5356 {
5357 bfd_size_type amt = sizeof (*ent);
5358 ent = bfd_alloc (abfd, amt);
5359 if (ent == NULL)
5360 return FALSE;
5361 ent->next = eh->elf.got.glist;
5362 ent->addend = rel->r_addend;
5363 ent->owner = abfd;
5364 ent->tls_type = tls_type;
5365 ent->is_indirect = FALSE;
5366 ent->got.refcount = 0;
5367 eh->elf.got.glist = ent;
5368 }
5369 ent->got.refcount += 1;
5370 eh->tls_mask |= tls_type;
5371 }
5372 else
5373 /* This is a global offset table entry for a local symbol. */
5374 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5375 rel->r_addend, tls_type))
5376 return FALSE;
5377
5378 /* We may also need a plt entry if the symbol turns out to be
5379 an ifunc. */
5380 if (h != NULL && !info->shared && abiversion (abfd) != 1)
5381 {
5382 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5383 return FALSE;
5384 }
5385 break;
5386
5387 case R_PPC64_PLT16_HA:
5388 case R_PPC64_PLT16_HI:
5389 case R_PPC64_PLT16_LO:
5390 case R_PPC64_PLT32:
5391 case R_PPC64_PLT64:
5392 /* This symbol requires a procedure linkage table entry. We
5393 actually build the entry in adjust_dynamic_symbol,
5394 because this might be a case of linking PIC code without
5395 linking in any dynamic objects, in which case we don't
5396 need to generate a procedure linkage table after all. */
5397 if (h == NULL)
5398 {
5399 /* It does not make sense to have a procedure linkage
5400 table entry for a local symbol. */
5401 bfd_set_error (bfd_error_bad_value);
5402 return FALSE;
5403 }
5404 else
5405 {
5406 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5407 return FALSE;
5408 h->needs_plt = 1;
5409 if (h->root.root.string[0] == '.'
5410 && h->root.root.string[1] != '\0')
5411 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5412 }
5413 break;
5414
5415 /* The following relocations don't need to propagate the
5416 relocation if linking a shared object since they are
5417 section relative. */
5418 case R_PPC64_SECTOFF:
5419 case R_PPC64_SECTOFF_LO:
5420 case R_PPC64_SECTOFF_HI:
5421 case R_PPC64_SECTOFF_HA:
5422 case R_PPC64_SECTOFF_DS:
5423 case R_PPC64_SECTOFF_LO_DS:
5424 case R_PPC64_DTPREL16:
5425 case R_PPC64_DTPREL16_LO:
5426 case R_PPC64_DTPREL16_HI:
5427 case R_PPC64_DTPREL16_HA:
5428 case R_PPC64_DTPREL16_DS:
5429 case R_PPC64_DTPREL16_LO_DS:
5430 case R_PPC64_DTPREL16_HIGH:
5431 case R_PPC64_DTPREL16_HIGHA:
5432 case R_PPC64_DTPREL16_HIGHER:
5433 case R_PPC64_DTPREL16_HIGHERA:
5434 case R_PPC64_DTPREL16_HIGHEST:
5435 case R_PPC64_DTPREL16_HIGHESTA:
5436 break;
5437
5438 /* Nor do these. */
5439 case R_PPC64_REL16:
5440 case R_PPC64_REL16_LO:
5441 case R_PPC64_REL16_HI:
5442 case R_PPC64_REL16_HA:
5443 break;
5444
5445 /* Not supported as a dynamic relocation. */
5446 case R_PPC64_ADDR64_LOCAL:
5447 if (info->shared)
5448 {
5449 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5450 ppc_howto_init ();
5451 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5452 "in shared libraries and PIEs.\n"),
5453 abfd, sec, rel->r_offset,
5454 ppc64_elf_howto_table[r_type]->name);
5455 bfd_set_error (bfd_error_bad_value);
5456 return FALSE;
5457 }
5458 break;
5459
5460 case R_PPC64_TOC16:
5461 case R_PPC64_TOC16_DS:
5462 htab->do_multi_toc = 1;
5463 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5464 case R_PPC64_TOC16_LO:
5465 case R_PPC64_TOC16_HI:
5466 case R_PPC64_TOC16_HA:
5467 case R_PPC64_TOC16_LO_DS:
5468 sec->has_toc_reloc = 1;
5469 break;
5470
5471 /* This relocation describes the C++ object vtable hierarchy.
5472 Reconstruct it for later use during GC. */
5473 case R_PPC64_GNU_VTINHERIT:
5474 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5475 return FALSE;
5476 break;
5477
5478 /* This relocation describes which C++ vtable entries are actually
5479 used. Record for later use during GC. */
5480 case R_PPC64_GNU_VTENTRY:
5481 BFD_ASSERT (h != NULL);
5482 if (h != NULL
5483 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5484 return FALSE;
5485 break;
5486
5487 case R_PPC64_REL14:
5488 case R_PPC64_REL14_BRTAKEN:
5489 case R_PPC64_REL14_BRNTAKEN:
5490 {
5491 asection *dest = NULL;
5492
5493 /* Heuristic: If jumping outside our section, chances are
5494 we are going to need a stub. */
5495 if (h != NULL)
5496 {
5497 /* If the sym is weak it may be overridden later, so
5498 don't assume we know where a weak sym lives. */
5499 if (h->root.type == bfd_link_hash_defined)
5500 dest = h->root.u.def.section;
5501 }
5502 else
5503 {
5504 Elf_Internal_Sym *isym;
5505
5506 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5507 abfd, r_symndx);
5508 if (isym == NULL)
5509 return FALSE;
5510
5511 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5512 }
5513
5514 if (dest != sec)
5515 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5516 }
5517 /* Fall through. */
5518
5519 case R_PPC64_REL24:
5520 if (h != NULL && ifunc == NULL)
5521 {
5522 /* We may need a .plt entry if the function this reloc
5523 refers to is in a shared lib. */
5524 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5525 return FALSE;
5526 h->needs_plt = 1;
5527 if (h->root.root.string[0] == '.'
5528 && h->root.root.string[1] != '\0')
5529 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5530 if (h == tga || h == dottga)
5531 sec->has_tls_reloc = 1;
5532 }
5533 break;
5534
5535 case R_PPC64_TPREL64:
5536 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5537 if (!info->executable)
5538 info->flags |= DF_STATIC_TLS;
5539 goto dotlstoc;
5540
5541 case R_PPC64_DTPMOD64:
5542 if (rel + 1 < rel_end
5543 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5544 && rel[1].r_offset == rel->r_offset + 8)
5545 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5546 else
5547 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5548 goto dotlstoc;
5549
5550 case R_PPC64_DTPREL64:
5551 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5552 if (rel != relocs
5553 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5554 && rel[-1].r_offset == rel->r_offset - 8)
5555 /* This is the second reloc of a dtpmod, dtprel pair.
5556 Don't mark with TLS_DTPREL. */
5557 goto dodyn;
5558
5559 dotlstoc:
5560 sec->has_tls_reloc = 1;
5561 if (h != NULL)
5562 {
5563 struct ppc_link_hash_entry *eh;
5564 eh = (struct ppc_link_hash_entry *) h;
5565 eh->tls_mask |= tls_type;
5566 }
5567 else
5568 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5569 rel->r_addend, tls_type))
5570 return FALSE;
5571
5572 ppc64_sec = ppc64_elf_section_data (sec);
5573 if (ppc64_sec->sec_type != sec_toc)
5574 {
5575 bfd_size_type amt;
5576
5577 /* One extra to simplify get_tls_mask. */
5578 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5579 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5580 if (ppc64_sec->u.toc.symndx == NULL)
5581 return FALSE;
5582 amt = sec->size * sizeof (bfd_vma) / 8;
5583 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5584 if (ppc64_sec->u.toc.add == NULL)
5585 return FALSE;
5586 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5587 ppc64_sec->sec_type = sec_toc;
5588 }
5589 BFD_ASSERT (rel->r_offset % 8 == 0);
5590 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5591 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5592
5593 /* Mark the second slot of a GD or LD entry.
5594 -1 to indicate GD and -2 to indicate LD. */
5595 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5596 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5597 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5598 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5599 goto dodyn;
5600
5601 case R_PPC64_TPREL16:
5602 case R_PPC64_TPREL16_LO:
5603 case R_PPC64_TPREL16_HI:
5604 case R_PPC64_TPREL16_HA:
5605 case R_PPC64_TPREL16_DS:
5606 case R_PPC64_TPREL16_LO_DS:
5607 case R_PPC64_TPREL16_HIGH:
5608 case R_PPC64_TPREL16_HIGHA:
5609 case R_PPC64_TPREL16_HIGHER:
5610 case R_PPC64_TPREL16_HIGHERA:
5611 case R_PPC64_TPREL16_HIGHEST:
5612 case R_PPC64_TPREL16_HIGHESTA:
5613 if (info->shared)
5614 {
5615 if (!info->executable)
5616 info->flags |= DF_STATIC_TLS;
5617 goto dodyn;
5618 }
5619 break;
5620
5621 case R_PPC64_ADDR64:
5622 if (opd_sym_map != NULL
5623 && rel + 1 < rel_end
5624 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5625 {
5626 if (h != NULL)
5627 {
5628 if (h->root.root.string[0] == '.'
5629 && h->root.root.string[1] != 0
5630 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5631 ;
5632 else
5633 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5634 }
5635 else
5636 {
5637 asection *s;
5638 Elf_Internal_Sym *isym;
5639
5640 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5641 abfd, r_symndx);
5642 if (isym == NULL)
5643 return FALSE;
5644
5645 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5646 if (s != NULL && s != sec)
5647 opd_sym_map[rel->r_offset / 8] = s;
5648 }
5649 }
5650 /* Fall through. */
5651
5652 case R_PPC64_ADDR16:
5653 case R_PPC64_ADDR16_DS:
5654 case R_PPC64_ADDR16_HA:
5655 case R_PPC64_ADDR16_HI:
5656 case R_PPC64_ADDR16_HIGH:
5657 case R_PPC64_ADDR16_HIGHA:
5658 case R_PPC64_ADDR16_HIGHER:
5659 case R_PPC64_ADDR16_HIGHERA:
5660 case R_PPC64_ADDR16_HIGHEST:
5661 case R_PPC64_ADDR16_HIGHESTA:
5662 case R_PPC64_ADDR16_LO:
5663 case R_PPC64_ADDR16_LO_DS:
5664 if (h != NULL && !info->shared && abiversion (abfd) != 1
5665 && rel->r_addend == 0)
5666 {
5667 /* We may need a .plt entry if this reloc refers to a
5668 function in a shared lib. */
5669 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5670 return FALSE;
5671 h->pointer_equality_needed = 1;
5672 }
5673 /* Fall through. */
5674
5675 case R_PPC64_REL30:
5676 case R_PPC64_REL32:
5677 case R_PPC64_REL64:
5678 case R_PPC64_ADDR14:
5679 case R_PPC64_ADDR14_BRNTAKEN:
5680 case R_PPC64_ADDR14_BRTAKEN:
5681 case R_PPC64_ADDR24:
5682 case R_PPC64_ADDR32:
5683 case R_PPC64_UADDR16:
5684 case R_PPC64_UADDR32:
5685 case R_PPC64_UADDR64:
5686 case R_PPC64_TOC:
5687 if (h != NULL && !info->shared)
5688 /* We may need a copy reloc. */
5689 h->non_got_ref = 1;
5690
5691 /* Don't propagate .opd relocs. */
5692 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5693 break;
5694
5695 /* If we are creating a shared library, and this is a reloc
5696 against a global symbol, or a non PC relative reloc
5697 against a local symbol, then we need to copy the reloc
5698 into the shared library. However, if we are linking with
5699 -Bsymbolic, we do not need to copy a reloc against a
5700 global symbol which is defined in an object we are
5701 including in the link (i.e., DEF_REGULAR is set). At
5702 this point we have not seen all the input files, so it is
5703 possible that DEF_REGULAR is not set now but will be set
5704 later (it is never cleared). In case of a weak definition,
5705 DEF_REGULAR may be cleared later by a strong definition in
5706 a shared library. We account for that possibility below by
5707 storing information in the dyn_relocs field of the hash
5708 table entry. A similar situation occurs when creating
5709 shared libraries and symbol visibility changes render the
5710 symbol local.
5711
5712 If on the other hand, we are creating an executable, we
5713 may need to keep relocations for symbols satisfied by a
5714 dynamic library if we manage to avoid copy relocs for the
5715 symbol. */
5716 dodyn:
5717 if ((info->shared
5718 && (must_be_dyn_reloc (info, r_type)
5719 || (h != NULL
5720 && (!SYMBOLIC_BIND (info, h)
5721 || h->root.type == bfd_link_hash_defweak
5722 || !h->def_regular))))
5723 || (ELIMINATE_COPY_RELOCS
5724 && !info->shared
5725 && h != NULL
5726 && (h->root.type == bfd_link_hash_defweak
5727 || !h->def_regular))
5728 || (!info->shared
5729 && ifunc != NULL))
5730 {
5731 /* We must copy these reloc types into the output file.
5732 Create a reloc section in dynobj and make room for
5733 this reloc. */
5734 if (sreloc == NULL)
5735 {
5736 sreloc = _bfd_elf_make_dynamic_reloc_section
5737 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5738
5739 if (sreloc == NULL)
5740 return FALSE;
5741 }
5742
5743 /* If this is a global symbol, we count the number of
5744 relocations we need for this symbol. */
5745 if (h != NULL)
5746 {
5747 struct elf_dyn_relocs *p;
5748 struct elf_dyn_relocs **head;
5749
5750 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5751 p = *head;
5752 if (p == NULL || p->sec != sec)
5753 {
5754 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5755 if (p == NULL)
5756 return FALSE;
5757 p->next = *head;
5758 *head = p;
5759 p->sec = sec;
5760 p->count = 0;
5761 p->pc_count = 0;
5762 }
5763 p->count += 1;
5764 if (!must_be_dyn_reloc (info, r_type))
5765 p->pc_count += 1;
5766 }
5767 else
5768 {
5769 /* Track dynamic relocs needed for local syms too.
5770 We really need local syms available to do this
5771 easily. Oh well. */
5772 struct ppc_dyn_relocs *p;
5773 struct ppc_dyn_relocs **head;
5774 bfd_boolean is_ifunc;
5775 asection *s;
5776 void *vpp;
5777 Elf_Internal_Sym *isym;
5778
5779 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5780 abfd, r_symndx);
5781 if (isym == NULL)
5782 return FALSE;
5783
5784 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5785 if (s == NULL)
5786 s = sec;
5787
5788 vpp = &elf_section_data (s)->local_dynrel;
5789 head = (struct ppc_dyn_relocs **) vpp;
5790 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5791 p = *head;
5792 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5793 p = p->next;
5794 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5795 {
5796 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5797 if (p == NULL)
5798 return FALSE;
5799 p->next = *head;
5800 *head = p;
5801 p->sec = sec;
5802 p->ifunc = is_ifunc;
5803 p->count = 0;
5804 }
5805 p->count += 1;
5806 }
5807 }
5808 break;
5809
5810 default:
5811 break;
5812 }
5813 }
5814
5815 return TRUE;
5816 }
5817
5818 /* Merge backend specific data from an object file to the output
5819 object file when linking. */
5820
5821 static bfd_boolean
5822 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5823 {
5824 unsigned long iflags, oflags;
5825
5826 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5827 return TRUE;
5828
5829 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5830 return TRUE;
5831
5832 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5833 return FALSE;
5834
5835 iflags = elf_elfheader (ibfd)->e_flags;
5836 oflags = elf_elfheader (obfd)->e_flags;
5837
5838 if (iflags & ~EF_PPC64_ABI)
5839 {
5840 (*_bfd_error_handler)
5841 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5842 bfd_set_error (bfd_error_bad_value);
5843 return FALSE;
5844 }
5845 else if (iflags != oflags && iflags != 0)
5846 {
5847 (*_bfd_error_handler)
5848 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5849 ibfd, iflags, oflags);
5850 bfd_set_error (bfd_error_bad_value);
5851 return FALSE;
5852 }
5853
5854 /* Merge Tag_compatibility attributes and any common GNU ones. */
5855 _bfd_elf_merge_object_attributes (ibfd, obfd);
5856
5857 return TRUE;
5858 }
5859
5860 static bfd_boolean
5861 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5862 {
5863 /* Print normal ELF private data. */
5864 _bfd_elf_print_private_bfd_data (abfd, ptr);
5865
5866 if (elf_elfheader (abfd)->e_flags != 0)
5867 {
5868 FILE *file = ptr;
5869
5870 /* xgettext:c-format */
5871 fprintf (file, _("private flags = 0x%lx:"),
5872 elf_elfheader (abfd)->e_flags);
5873
5874 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5875 fprintf (file, _(" [abiv%ld]"),
5876 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5877 fputc ('\n', file);
5878 }
5879
5880 return TRUE;
5881 }
5882
5883 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5884 of the code entry point, and its section. */
5885
5886 static bfd_vma
5887 opd_entry_value (asection *opd_sec,
5888 bfd_vma offset,
5889 asection **code_sec,
5890 bfd_vma *code_off,
5891 bfd_boolean in_code_sec)
5892 {
5893 bfd *opd_bfd = opd_sec->owner;
5894 Elf_Internal_Rela *relocs;
5895 Elf_Internal_Rela *lo, *hi, *look;
5896 bfd_vma val;
5897
5898 /* No relocs implies we are linking a --just-symbols object, or looking
5899 at a final linked executable with addr2line or somesuch. */
5900 if (opd_sec->reloc_count == 0)
5901 {
5902 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5903
5904 if (contents == NULL)
5905 {
5906 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5907 return (bfd_vma) -1;
5908 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5909 }
5910
5911 val = bfd_get_64 (opd_bfd, contents + offset);
5912 if (code_sec != NULL)
5913 {
5914 asection *sec, *likely = NULL;
5915
5916 if (in_code_sec)
5917 {
5918 sec = *code_sec;
5919 if (sec->vma <= val
5920 && val < sec->vma + sec->size)
5921 likely = sec;
5922 else
5923 val = -1;
5924 }
5925 else
5926 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5927 if (sec->vma <= val
5928 && (sec->flags & SEC_LOAD) != 0
5929 && (sec->flags & SEC_ALLOC) != 0)
5930 likely = sec;
5931 if (likely != NULL)
5932 {
5933 *code_sec = likely;
5934 if (code_off != NULL)
5935 *code_off = val - likely->vma;
5936 }
5937 }
5938 return val;
5939 }
5940
5941 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5942
5943 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5944 if (relocs == NULL)
5945 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5946
5947 /* Go find the opd reloc at the sym address. */
5948 lo = relocs;
5949 BFD_ASSERT (lo != NULL);
5950 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5951 val = (bfd_vma) -1;
5952 while (lo < hi)
5953 {
5954 look = lo + (hi - lo) / 2;
5955 if (look->r_offset < offset)
5956 lo = look + 1;
5957 else if (look->r_offset > offset)
5958 hi = look;
5959 else
5960 {
5961 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5962
5963 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5964 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5965 {
5966 unsigned long symndx = ELF64_R_SYM (look->r_info);
5967 asection *sec;
5968
5969 if (symndx < symtab_hdr->sh_info
5970 || elf_sym_hashes (opd_bfd) == NULL)
5971 {
5972 Elf_Internal_Sym *sym;
5973
5974 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5975 if (sym == NULL)
5976 {
5977 size_t symcnt = symtab_hdr->sh_info;
5978 if (elf_sym_hashes (opd_bfd) == NULL)
5979 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5980 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5981 0, NULL, NULL, NULL);
5982 if (sym == NULL)
5983 break;
5984 symtab_hdr->contents = (bfd_byte *) sym;
5985 }
5986
5987 sym += symndx;
5988 val = sym->st_value;
5989 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5990 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5991 }
5992 else
5993 {
5994 struct elf_link_hash_entry **sym_hashes;
5995 struct elf_link_hash_entry *rh;
5996
5997 sym_hashes = elf_sym_hashes (opd_bfd);
5998 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5999 if (rh != NULL)
6000 {
6001 rh = elf_follow_link (rh);
6002 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
6003 || rh->root.type == bfd_link_hash_defweak);
6004 val = rh->root.u.def.value;
6005 sec = rh->root.u.def.section;
6006 }
6007 else
6008 {
6009 /* Handle the odd case where we can be called
6010 during bfd_elf_link_add_symbols before the
6011 symbol hashes have been fully populated. */
6012 Elf_Internal_Sym *sym;
6013
6014 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
6015 symndx, NULL, NULL, NULL);
6016 if (sym == NULL)
6017 break;
6018
6019 val = sym->st_value;
6020 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6021 free (sym);
6022 }
6023 }
6024 val += look->r_addend;
6025 if (code_off != NULL)
6026 *code_off = val;
6027 if (code_sec != NULL)
6028 {
6029 if (in_code_sec && *code_sec != sec)
6030 return -1;
6031 else
6032 *code_sec = sec;
6033 }
6034 if (sec != NULL && sec->output_section != NULL)
6035 val += sec->output_section->vma + sec->output_offset;
6036 }
6037 break;
6038 }
6039 }
6040
6041 return val;
6042 }
6043
6044 /* If the ELF symbol SYM might be a function in SEC, return the
6045 function size and set *CODE_OFF to the function's entry point,
6046 otherwise return zero. */
6047
6048 static bfd_size_type
6049 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6050 bfd_vma *code_off)
6051 {
6052 bfd_size_type size;
6053
6054 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6055 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6056 return 0;
6057
6058 size = 0;
6059 if (!(sym->flags & BSF_SYNTHETIC))
6060 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6061
6062 if (strcmp (sym->section->name, ".opd") == 0)
6063 {
6064 if (opd_entry_value (sym->section, sym->value,
6065 &sec, code_off, TRUE) == (bfd_vma) -1)
6066 return 0;
6067 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6068 symbol. This size has nothing to do with the code size of the
6069 function, which is what we're supposed to return, but the
6070 code size isn't available without looking up the dot-sym.
6071 However, doing that would be a waste of time particularly
6072 since elf_find_function will look at the dot-sym anyway.
6073 Now, elf_find_function will keep the largest size of any
6074 function sym found at the code address of interest, so return
6075 1 here to avoid it incorrectly caching a larger function size
6076 for a small function. This does mean we return the wrong
6077 size for a new-ABI function of size 24, but all that does is
6078 disable caching for such functions. */
6079 if (size == 24)
6080 size = 1;
6081 }
6082 else
6083 {
6084 if (sym->section != sec)
6085 return 0;
6086 *code_off = sym->value;
6087 }
6088 if (size == 0)
6089 size = 1;
6090 return size;
6091 }
6092
6093 /* Return true if symbol is defined in a regular object file. */
6094
6095 static bfd_boolean
6096 is_static_defined (struct elf_link_hash_entry *h)
6097 {
6098 return ((h->root.type == bfd_link_hash_defined
6099 || h->root.type == bfd_link_hash_defweak)
6100 && h->root.u.def.section != NULL
6101 && h->root.u.def.section->output_section != NULL);
6102 }
6103
6104 /* If FDH is a function descriptor symbol, return the associated code
6105 entry symbol if it is defined. Return NULL otherwise. */
6106
6107 static struct ppc_link_hash_entry *
6108 defined_code_entry (struct ppc_link_hash_entry *fdh)
6109 {
6110 if (fdh->is_func_descriptor)
6111 {
6112 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6113 if (fh->elf.root.type == bfd_link_hash_defined
6114 || fh->elf.root.type == bfd_link_hash_defweak)
6115 return fh;
6116 }
6117 return NULL;
6118 }
6119
6120 /* If FH is a function code entry symbol, return the associated
6121 function descriptor symbol if it is defined. Return NULL otherwise. */
6122
6123 static struct ppc_link_hash_entry *
6124 defined_func_desc (struct ppc_link_hash_entry *fh)
6125 {
6126 if (fh->oh != NULL
6127 && fh->oh->is_func_descriptor)
6128 {
6129 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6130 if (fdh->elf.root.type == bfd_link_hash_defined
6131 || fdh->elf.root.type == bfd_link_hash_defweak)
6132 return fdh;
6133 }
6134 return NULL;
6135 }
6136
6137 /* Mark all our entry sym sections, both opd and code section. */
6138
6139 static void
6140 ppc64_elf_gc_keep (struct bfd_link_info *info)
6141 {
6142 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6143 struct bfd_sym_chain *sym;
6144
6145 if (htab == NULL)
6146 return;
6147
6148 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6149 {
6150 struct ppc_link_hash_entry *eh, *fh;
6151 asection *sec;
6152
6153 eh = (struct ppc_link_hash_entry *)
6154 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6155 if (eh == NULL)
6156 continue;
6157 if (eh->elf.root.type != bfd_link_hash_defined
6158 && eh->elf.root.type != bfd_link_hash_defweak)
6159 continue;
6160
6161 fh = defined_code_entry (eh);
6162 if (fh != NULL)
6163 {
6164 sec = fh->elf.root.u.def.section;
6165 sec->flags |= SEC_KEEP;
6166 }
6167 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6168 && opd_entry_value (eh->elf.root.u.def.section,
6169 eh->elf.root.u.def.value,
6170 &sec, NULL, FALSE) != (bfd_vma) -1)
6171 sec->flags |= SEC_KEEP;
6172
6173 sec = eh->elf.root.u.def.section;
6174 sec->flags |= SEC_KEEP;
6175 }
6176 }
6177
6178 /* Mark sections containing dynamically referenced symbols. When
6179 building shared libraries, we must assume that any visible symbol is
6180 referenced. */
6181
6182 static bfd_boolean
6183 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6184 {
6185 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6186 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6187 struct ppc_link_hash_entry *fdh;
6188 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6189
6190 /* Dynamic linking info is on the func descriptor sym. */
6191 fdh = defined_func_desc (eh);
6192 if (fdh != NULL)
6193 eh = fdh;
6194
6195 if ((eh->elf.root.type == bfd_link_hash_defined
6196 || eh->elf.root.type == bfd_link_hash_defweak)
6197 && (eh->elf.ref_dynamic
6198 || (eh->elf.def_regular
6199 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6200 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6201 && (!info->executable
6202 || info->export_dynamic
6203 || (eh->elf.dynamic
6204 && d != NULL
6205 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6206 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6207 || !bfd_hide_sym_by_version (info->version_info,
6208 eh->elf.root.root.string)))))
6209 {
6210 asection *code_sec;
6211 struct ppc_link_hash_entry *fh;
6212
6213 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6214
6215 /* Function descriptor syms cause the associated
6216 function code sym section to be marked. */
6217 fh = defined_code_entry (eh);
6218 if (fh != NULL)
6219 {
6220 code_sec = fh->elf.root.u.def.section;
6221 code_sec->flags |= SEC_KEEP;
6222 }
6223 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6224 && opd_entry_value (eh->elf.root.u.def.section,
6225 eh->elf.root.u.def.value,
6226 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6227 code_sec->flags |= SEC_KEEP;
6228 }
6229
6230 return TRUE;
6231 }
6232
6233 /* Return the section that should be marked against GC for a given
6234 relocation. */
6235
6236 static asection *
6237 ppc64_elf_gc_mark_hook (asection *sec,
6238 struct bfd_link_info *info,
6239 Elf_Internal_Rela *rel,
6240 struct elf_link_hash_entry *h,
6241 Elf_Internal_Sym *sym)
6242 {
6243 asection *rsec;
6244
6245 /* Syms return NULL if we're marking .opd, so we avoid marking all
6246 function sections, as all functions are referenced in .opd. */
6247 rsec = NULL;
6248 if (get_opd_info (sec) != NULL)
6249 return rsec;
6250
6251 if (h != NULL)
6252 {
6253 enum elf_ppc64_reloc_type r_type;
6254 struct ppc_link_hash_entry *eh, *fh, *fdh;
6255
6256 r_type = ELF64_R_TYPE (rel->r_info);
6257 switch (r_type)
6258 {
6259 case R_PPC64_GNU_VTINHERIT:
6260 case R_PPC64_GNU_VTENTRY:
6261 break;
6262
6263 default:
6264 switch (h->root.type)
6265 {
6266 case bfd_link_hash_defined:
6267 case bfd_link_hash_defweak:
6268 eh = (struct ppc_link_hash_entry *) h;
6269 fdh = defined_func_desc (eh);
6270 if (fdh != NULL)
6271 eh = fdh;
6272
6273 /* Function descriptor syms cause the associated
6274 function code sym section to be marked. */
6275 fh = defined_code_entry (eh);
6276 if (fh != NULL)
6277 {
6278 /* They also mark their opd section. */
6279 eh->elf.root.u.def.section->gc_mark = 1;
6280
6281 rsec = fh->elf.root.u.def.section;
6282 }
6283 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6284 && opd_entry_value (eh->elf.root.u.def.section,
6285 eh->elf.root.u.def.value,
6286 &rsec, NULL, FALSE) != (bfd_vma) -1)
6287 eh->elf.root.u.def.section->gc_mark = 1;
6288 else
6289 rsec = h->root.u.def.section;
6290 break;
6291
6292 case bfd_link_hash_common:
6293 rsec = h->root.u.c.p->section;
6294 break;
6295
6296 default:
6297 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6298 }
6299 }
6300 }
6301 else
6302 {
6303 struct _opd_sec_data *opd;
6304
6305 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6306 opd = get_opd_info (rsec);
6307 if (opd != NULL && opd->func_sec != NULL)
6308 {
6309 rsec->gc_mark = 1;
6310
6311 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6312 }
6313 }
6314
6315 return rsec;
6316 }
6317
6318 /* Update the .got, .plt. and dynamic reloc reference counts for the
6319 section being removed. */
6320
6321 static bfd_boolean
6322 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6323 asection *sec, const Elf_Internal_Rela *relocs)
6324 {
6325 struct ppc_link_hash_table *htab;
6326 Elf_Internal_Shdr *symtab_hdr;
6327 struct elf_link_hash_entry **sym_hashes;
6328 struct got_entry **local_got_ents;
6329 const Elf_Internal_Rela *rel, *relend;
6330
6331 if (info->relocatable)
6332 return TRUE;
6333
6334 if ((sec->flags & SEC_ALLOC) == 0)
6335 return TRUE;
6336
6337 elf_section_data (sec)->local_dynrel = NULL;
6338
6339 htab = ppc_hash_table (info);
6340 if (htab == NULL)
6341 return FALSE;
6342
6343 symtab_hdr = &elf_symtab_hdr (abfd);
6344 sym_hashes = elf_sym_hashes (abfd);
6345 local_got_ents = elf_local_got_ents (abfd);
6346
6347 relend = relocs + sec->reloc_count;
6348 for (rel = relocs; rel < relend; rel++)
6349 {
6350 unsigned long r_symndx;
6351 enum elf_ppc64_reloc_type r_type;
6352 struct elf_link_hash_entry *h = NULL;
6353 unsigned char tls_type = 0;
6354
6355 r_symndx = ELF64_R_SYM (rel->r_info);
6356 r_type = ELF64_R_TYPE (rel->r_info);
6357 if (r_symndx >= symtab_hdr->sh_info)
6358 {
6359 struct ppc_link_hash_entry *eh;
6360 struct elf_dyn_relocs **pp;
6361 struct elf_dyn_relocs *p;
6362
6363 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6364 h = elf_follow_link (h);
6365 eh = (struct ppc_link_hash_entry *) h;
6366
6367 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6368 if (p->sec == sec)
6369 {
6370 /* Everything must go for SEC. */
6371 *pp = p->next;
6372 break;
6373 }
6374 }
6375
6376 if (is_branch_reloc (r_type))
6377 {
6378 struct plt_entry **ifunc = NULL;
6379 if (h != NULL)
6380 {
6381 if (h->type == STT_GNU_IFUNC)
6382 ifunc = &h->plt.plist;
6383 }
6384 else if (local_got_ents != NULL)
6385 {
6386 struct plt_entry **local_plt = (struct plt_entry **)
6387 (local_got_ents + symtab_hdr->sh_info);
6388 unsigned char *local_got_tls_masks = (unsigned char *)
6389 (local_plt + symtab_hdr->sh_info);
6390 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6391 ifunc = local_plt + r_symndx;
6392 }
6393 if (ifunc != NULL)
6394 {
6395 struct plt_entry *ent;
6396
6397 for (ent = *ifunc; ent != NULL; ent = ent->next)
6398 if (ent->addend == rel->r_addend)
6399 break;
6400 if (ent == NULL)
6401 abort ();
6402 if (ent->plt.refcount > 0)
6403 ent->plt.refcount -= 1;
6404 continue;
6405 }
6406 }
6407
6408 switch (r_type)
6409 {
6410 case R_PPC64_GOT_TLSLD16:
6411 case R_PPC64_GOT_TLSLD16_LO:
6412 case R_PPC64_GOT_TLSLD16_HI:
6413 case R_PPC64_GOT_TLSLD16_HA:
6414 tls_type = TLS_TLS | TLS_LD;
6415 goto dogot;
6416
6417 case R_PPC64_GOT_TLSGD16:
6418 case R_PPC64_GOT_TLSGD16_LO:
6419 case R_PPC64_GOT_TLSGD16_HI:
6420 case R_PPC64_GOT_TLSGD16_HA:
6421 tls_type = TLS_TLS | TLS_GD;
6422 goto dogot;
6423
6424 case R_PPC64_GOT_TPREL16_DS:
6425 case R_PPC64_GOT_TPREL16_LO_DS:
6426 case R_PPC64_GOT_TPREL16_HI:
6427 case R_PPC64_GOT_TPREL16_HA:
6428 tls_type = TLS_TLS | TLS_TPREL;
6429 goto dogot;
6430
6431 case R_PPC64_GOT_DTPREL16_DS:
6432 case R_PPC64_GOT_DTPREL16_LO_DS:
6433 case R_PPC64_GOT_DTPREL16_HI:
6434 case R_PPC64_GOT_DTPREL16_HA:
6435 tls_type = TLS_TLS | TLS_DTPREL;
6436 goto dogot;
6437
6438 case R_PPC64_GOT16:
6439 case R_PPC64_GOT16_DS:
6440 case R_PPC64_GOT16_HA:
6441 case R_PPC64_GOT16_HI:
6442 case R_PPC64_GOT16_LO:
6443 case R_PPC64_GOT16_LO_DS:
6444 dogot:
6445 {
6446 struct got_entry *ent;
6447
6448 if (h != NULL)
6449 ent = h->got.glist;
6450 else
6451 ent = local_got_ents[r_symndx];
6452
6453 for (; ent != NULL; ent = ent->next)
6454 if (ent->addend == rel->r_addend
6455 && ent->owner == abfd
6456 && ent->tls_type == tls_type)
6457 break;
6458 if (ent == NULL)
6459 abort ();
6460 if (ent->got.refcount > 0)
6461 ent->got.refcount -= 1;
6462 }
6463 break;
6464
6465 case R_PPC64_PLT16_HA:
6466 case R_PPC64_PLT16_HI:
6467 case R_PPC64_PLT16_LO:
6468 case R_PPC64_PLT32:
6469 case R_PPC64_PLT64:
6470 case R_PPC64_REL14:
6471 case R_PPC64_REL14_BRNTAKEN:
6472 case R_PPC64_REL14_BRTAKEN:
6473 case R_PPC64_REL24:
6474 if (h != NULL)
6475 {
6476 struct plt_entry *ent;
6477
6478 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6479 if (ent->addend == rel->r_addend)
6480 break;
6481 if (ent != NULL && ent->plt.refcount > 0)
6482 ent->plt.refcount -= 1;
6483 }
6484 break;
6485
6486 default:
6487 break;
6488 }
6489 }
6490 return TRUE;
6491 }
6492
6493 /* The maximum size of .sfpr. */
6494 #define SFPR_MAX (218*4)
6495
6496 struct sfpr_def_parms
6497 {
6498 const char name[12];
6499 unsigned char lo, hi;
6500 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6501 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6502 };
6503
6504 /* Auto-generate _save*, _rest* functions in .sfpr. */
6505
6506 static bfd_boolean
6507 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6508 {
6509 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6510 unsigned int i;
6511 size_t len = strlen (parm->name);
6512 bfd_boolean writing = FALSE;
6513 char sym[16];
6514
6515 if (htab == NULL)
6516 return FALSE;
6517
6518 memcpy (sym, parm->name, len);
6519 sym[len + 2] = 0;
6520
6521 for (i = parm->lo; i <= parm->hi; i++)
6522 {
6523 struct elf_link_hash_entry *h;
6524
6525 sym[len + 0] = i / 10 + '0';
6526 sym[len + 1] = i % 10 + '0';
6527 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6528 if (h != NULL
6529 && !h->def_regular)
6530 {
6531 h->root.type = bfd_link_hash_defined;
6532 h->root.u.def.section = htab->sfpr;
6533 h->root.u.def.value = htab->sfpr->size;
6534 h->type = STT_FUNC;
6535 h->def_regular = 1;
6536 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6537 writing = TRUE;
6538 if (htab->sfpr->contents == NULL)
6539 {
6540 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6541 if (htab->sfpr->contents == NULL)
6542 return FALSE;
6543 }
6544 }
6545 if (writing)
6546 {
6547 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6548 if (i != parm->hi)
6549 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6550 else
6551 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6552 htab->sfpr->size = p - htab->sfpr->contents;
6553 }
6554 }
6555
6556 return TRUE;
6557 }
6558
6559 static bfd_byte *
6560 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6561 {
6562 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6563 return p + 4;
6564 }
6565
6566 static bfd_byte *
6567 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6568 {
6569 p = savegpr0 (abfd, p, r);
6570 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6571 p = p + 4;
6572 bfd_put_32 (abfd, BLR, p);
6573 return p + 4;
6574 }
6575
6576 static bfd_byte *
6577 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6578 {
6579 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6580 return p + 4;
6581 }
6582
6583 static bfd_byte *
6584 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6585 {
6586 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6587 p = p + 4;
6588 p = restgpr0 (abfd, p, r);
6589 bfd_put_32 (abfd, MTLR_R0, p);
6590 p = p + 4;
6591 if (r == 29)
6592 {
6593 p = restgpr0 (abfd, p, 30);
6594 p = restgpr0 (abfd, p, 31);
6595 }
6596 bfd_put_32 (abfd, BLR, p);
6597 return p + 4;
6598 }
6599
6600 static bfd_byte *
6601 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6602 {
6603 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6604 return p + 4;
6605 }
6606
6607 static bfd_byte *
6608 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6609 {
6610 p = savegpr1 (abfd, p, r);
6611 bfd_put_32 (abfd, BLR, p);
6612 return p + 4;
6613 }
6614
6615 static bfd_byte *
6616 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6617 {
6618 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6619 return p + 4;
6620 }
6621
6622 static bfd_byte *
6623 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6624 {
6625 p = restgpr1 (abfd, p, r);
6626 bfd_put_32 (abfd, BLR, p);
6627 return p + 4;
6628 }
6629
6630 static bfd_byte *
6631 savefpr (bfd *abfd, bfd_byte *p, int r)
6632 {
6633 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6634 return p + 4;
6635 }
6636
6637 static bfd_byte *
6638 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6639 {
6640 p = savefpr (abfd, p, r);
6641 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6642 p = p + 4;
6643 bfd_put_32 (abfd, BLR, p);
6644 return p + 4;
6645 }
6646
6647 static bfd_byte *
6648 restfpr (bfd *abfd, bfd_byte *p, int r)
6649 {
6650 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6651 return p + 4;
6652 }
6653
6654 static bfd_byte *
6655 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6656 {
6657 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6658 p = p + 4;
6659 p = restfpr (abfd, p, r);
6660 bfd_put_32 (abfd, MTLR_R0, p);
6661 p = p + 4;
6662 if (r == 29)
6663 {
6664 p = restfpr (abfd, p, 30);
6665 p = restfpr (abfd, p, 31);
6666 }
6667 bfd_put_32 (abfd, BLR, p);
6668 return p + 4;
6669 }
6670
6671 static bfd_byte *
6672 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6673 {
6674 p = savefpr (abfd, p, r);
6675 bfd_put_32 (abfd, BLR, p);
6676 return p + 4;
6677 }
6678
6679 static bfd_byte *
6680 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6681 {
6682 p = restfpr (abfd, p, r);
6683 bfd_put_32 (abfd, BLR, p);
6684 return p + 4;
6685 }
6686
6687 static bfd_byte *
6688 savevr (bfd *abfd, bfd_byte *p, int r)
6689 {
6690 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6691 p = p + 4;
6692 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6693 return p + 4;
6694 }
6695
6696 static bfd_byte *
6697 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6698 {
6699 p = savevr (abfd, p, r);
6700 bfd_put_32 (abfd, BLR, p);
6701 return p + 4;
6702 }
6703
6704 static bfd_byte *
6705 restvr (bfd *abfd, bfd_byte *p, int r)
6706 {
6707 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6708 p = p + 4;
6709 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6710 return p + 4;
6711 }
6712
6713 static bfd_byte *
6714 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6715 {
6716 p = restvr (abfd, p, r);
6717 bfd_put_32 (abfd, BLR, p);
6718 return p + 4;
6719 }
6720
6721 /* Called via elf_link_hash_traverse to transfer dynamic linking
6722 information on function code symbol entries to their corresponding
6723 function descriptor symbol entries. */
6724
6725 static bfd_boolean
6726 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6727 {
6728 struct bfd_link_info *info;
6729 struct ppc_link_hash_table *htab;
6730 struct plt_entry *ent;
6731 struct ppc_link_hash_entry *fh;
6732 struct ppc_link_hash_entry *fdh;
6733 bfd_boolean force_local;
6734
6735 fh = (struct ppc_link_hash_entry *) h;
6736 if (fh->elf.root.type == bfd_link_hash_indirect)
6737 return TRUE;
6738
6739 info = inf;
6740 htab = ppc_hash_table (info);
6741 if (htab == NULL)
6742 return FALSE;
6743
6744 /* Resolve undefined references to dot-symbols as the value
6745 in the function descriptor, if we have one in a regular object.
6746 This is to satisfy cases like ".quad .foo". Calls to functions
6747 in dynamic objects are handled elsewhere. */
6748 if (fh->elf.root.type == bfd_link_hash_undefweak
6749 && fh->was_undefined
6750 && (fdh = defined_func_desc (fh)) != NULL
6751 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6752 && opd_entry_value (fdh->elf.root.u.def.section,
6753 fdh->elf.root.u.def.value,
6754 &fh->elf.root.u.def.section,
6755 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6756 {
6757 fh->elf.root.type = fdh->elf.root.type;
6758 fh->elf.forced_local = 1;
6759 fh->elf.def_regular = fdh->elf.def_regular;
6760 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6761 }
6762
6763 /* If this is a function code symbol, transfer dynamic linking
6764 information to the function descriptor symbol. */
6765 if (!fh->is_func)
6766 return TRUE;
6767
6768 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6769 if (ent->plt.refcount > 0)
6770 break;
6771 if (ent == NULL
6772 || fh->elf.root.root.string[0] != '.'
6773 || fh->elf.root.root.string[1] == '\0')
6774 return TRUE;
6775
6776 /* Find the corresponding function descriptor symbol. Create it
6777 as undefined if necessary. */
6778
6779 fdh = lookup_fdh (fh, htab);
6780 if (fdh == NULL
6781 && !info->executable
6782 && (fh->elf.root.type == bfd_link_hash_undefined
6783 || fh->elf.root.type == bfd_link_hash_undefweak))
6784 {
6785 fdh = make_fdh (info, fh);
6786 if (fdh == NULL)
6787 return FALSE;
6788 }
6789
6790 /* Fake function descriptors are made undefweak. If the function
6791 code symbol is strong undefined, make the fake sym the same.
6792 If the function code symbol is defined, then force the fake
6793 descriptor local; We can't support overriding of symbols in a
6794 shared library on a fake descriptor. */
6795
6796 if (fdh != NULL
6797 && fdh->fake
6798 && fdh->elf.root.type == bfd_link_hash_undefweak)
6799 {
6800 if (fh->elf.root.type == bfd_link_hash_undefined)
6801 {
6802 fdh->elf.root.type = bfd_link_hash_undefined;
6803 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6804 }
6805 else if (fh->elf.root.type == bfd_link_hash_defined
6806 || fh->elf.root.type == bfd_link_hash_defweak)
6807 {
6808 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6809 }
6810 }
6811
6812 if (fdh != NULL
6813 && !fdh->elf.forced_local
6814 && (!info->executable
6815 || fdh->elf.def_dynamic
6816 || fdh->elf.ref_dynamic
6817 || (fdh->elf.root.type == bfd_link_hash_undefweak
6818 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6819 {
6820 if (fdh->elf.dynindx == -1)
6821 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6822 return FALSE;
6823 fdh->elf.ref_regular |= fh->elf.ref_regular;
6824 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6825 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6826 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6827 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6828 {
6829 move_plt_plist (fh, fdh);
6830 fdh->elf.needs_plt = 1;
6831 }
6832 fdh->is_func_descriptor = 1;
6833 fdh->oh = fh;
6834 fh->oh = fdh;
6835 }
6836
6837 /* Now that the info is on the function descriptor, clear the
6838 function code sym info. Any function code syms for which we
6839 don't have a definition in a regular file, we force local.
6840 This prevents a shared library from exporting syms that have
6841 been imported from another library. Function code syms that
6842 are really in the library we must leave global to prevent the
6843 linker dragging in a definition from a static library. */
6844 force_local = (!fh->elf.def_regular
6845 || fdh == NULL
6846 || !fdh->elf.def_regular
6847 || fdh->elf.forced_local);
6848 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6849
6850 return TRUE;
6851 }
6852
6853 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6854 this hook to a) provide some gcc support functions, and b) transfer
6855 dynamic linking information gathered so far on function code symbol
6856 entries, to their corresponding function descriptor symbol entries. */
6857
6858 static bfd_boolean
6859 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6860 struct bfd_link_info *info)
6861 {
6862 struct ppc_link_hash_table *htab;
6863 unsigned int i;
6864 static const struct sfpr_def_parms funcs[] =
6865 {
6866 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6867 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6868 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6869 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6870 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6871 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6872 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6873 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6874 { "._savef", 14, 31, savefpr, savefpr1_tail },
6875 { "._restf", 14, 31, restfpr, restfpr1_tail },
6876 { "_savevr_", 20, 31, savevr, savevr_tail },
6877 { "_restvr_", 20, 31, restvr, restvr_tail }
6878 };
6879
6880 htab = ppc_hash_table (info);
6881 if (htab == NULL)
6882 return FALSE;
6883
6884 if (!info->relocatable
6885 && htab->elf.hgot != NULL)
6886 {
6887 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6888 /* Make .TOC. defined so as to prevent it being made dynamic.
6889 The wrong value here is fixed later in ppc64_elf_set_toc. */
6890 htab->elf.hgot->type = STT_OBJECT;
6891 htab->elf.hgot->root.type = bfd_link_hash_defined;
6892 htab->elf.hgot->root.u.def.value = 0;
6893 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6894 htab->elf.hgot->def_regular = 1;
6895 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6896 | STV_HIDDEN);
6897 }
6898
6899 if (htab->sfpr == NULL)
6900 /* We don't have any relocs. */
6901 return TRUE;
6902
6903 /* Provide any missing _save* and _rest* functions. */
6904 htab->sfpr->size = 0;
6905 if (htab->params->save_restore_funcs)
6906 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6907 if (!sfpr_define (info, &funcs[i]))
6908 return FALSE;
6909
6910 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6911
6912 if (htab->sfpr->size == 0)
6913 htab->sfpr->flags |= SEC_EXCLUDE;
6914
6915 return TRUE;
6916 }
6917
6918 /* Return true if we have dynamic relocs that apply to read-only sections. */
6919
6920 static bfd_boolean
6921 readonly_dynrelocs (struct elf_link_hash_entry *h)
6922 {
6923 struct ppc_link_hash_entry *eh;
6924 struct elf_dyn_relocs *p;
6925
6926 eh = (struct ppc_link_hash_entry *) h;
6927 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6928 {
6929 asection *s = p->sec->output_section;
6930
6931 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6932 return TRUE;
6933 }
6934 return FALSE;
6935 }
6936
6937 /* Adjust a symbol defined by a dynamic object and referenced by a
6938 regular object. The current definition is in some section of the
6939 dynamic object, but we're not including those sections. We have to
6940 change the definition to something the rest of the link can
6941 understand. */
6942
6943 static bfd_boolean
6944 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6945 struct elf_link_hash_entry *h)
6946 {
6947 struct ppc_link_hash_table *htab;
6948 asection *s;
6949
6950 htab = ppc_hash_table (info);
6951 if (htab == NULL)
6952 return FALSE;
6953
6954 /* Deal with function syms. */
6955 if (h->type == STT_FUNC
6956 || h->type == STT_GNU_IFUNC
6957 || h->needs_plt)
6958 {
6959 /* Clear procedure linkage table information for any symbol that
6960 won't need a .plt entry. */
6961 struct plt_entry *ent;
6962 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6963 if (ent->plt.refcount > 0)
6964 break;
6965 if (ent == NULL
6966 || (h->type != STT_GNU_IFUNC
6967 && (SYMBOL_CALLS_LOCAL (info, h)
6968 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6969 && h->root.type == bfd_link_hash_undefweak))))
6970 {
6971 h->plt.plist = NULL;
6972 h->needs_plt = 0;
6973 }
6974 else if (abiversion (info->output_bfd) == 2)
6975 {
6976 /* After adjust_dynamic_symbol, non_got_ref set in the
6977 non-shared case means that we have allocated space in
6978 .dynbss for the symbol and thus dyn_relocs for this
6979 symbol should be discarded.
6980 If we get here we know we are making a PLT entry for this
6981 symbol, and in an executable we'd normally resolve
6982 relocations against this symbol to the PLT entry. Allow
6983 dynamic relocs if the reference is weak, and the dynamic
6984 relocs will not cause text relocation. */
6985 if (!h->ref_regular_nonweak
6986 && h->non_got_ref
6987 && h->type != STT_GNU_IFUNC
6988 && !readonly_dynrelocs (h))
6989 h->non_got_ref = 0;
6990
6991 /* If making a plt entry, then we don't need copy relocs. */
6992 return TRUE;
6993 }
6994 }
6995 else
6996 h->plt.plist = NULL;
6997
6998 /* If this is a weak symbol, and there is a real definition, the
6999 processor independent code will have arranged for us to see the
7000 real definition first, and we can just use the same value. */
7001 if (h->u.weakdef != NULL)
7002 {
7003 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7004 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7005 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7006 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7007 if (ELIMINATE_COPY_RELOCS)
7008 h->non_got_ref = h->u.weakdef->non_got_ref;
7009 return TRUE;
7010 }
7011
7012 /* If we are creating a shared library, we must presume that the
7013 only references to the symbol are via the global offset table.
7014 For such cases we need not do anything here; the relocations will
7015 be handled correctly by relocate_section. */
7016 if (info->shared)
7017 return TRUE;
7018
7019 /* If there are no references to this symbol that do not use the
7020 GOT, we don't need to generate a copy reloc. */
7021 if (!h->non_got_ref)
7022 return TRUE;
7023
7024 /* Don't generate a copy reloc for symbols defined in the executable. */
7025 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7026 return TRUE;
7027
7028 /* If we didn't find any dynamic relocs in read-only sections, then
7029 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7030 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7031 {
7032 h->non_got_ref = 0;
7033 return TRUE;
7034 }
7035
7036 if (h->plt.plist != NULL)
7037 {
7038 /* We should never get here, but unfortunately there are versions
7039 of gcc out there that improperly (for this ABI) put initialized
7040 function pointers, vtable refs and suchlike in read-only
7041 sections. Allow them to proceed, but warn that this might
7042 break at runtime. */
7043 info->callbacks->einfo
7044 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7045 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7046 h->root.root.string);
7047 }
7048
7049 /* This is a reference to a symbol defined by a dynamic object which
7050 is not a function. */
7051
7052 /* We must allocate the symbol in our .dynbss section, which will
7053 become part of the .bss section of the executable. There will be
7054 an entry for this symbol in the .dynsym section. The dynamic
7055 object will contain position independent code, so all references
7056 from the dynamic object to this symbol will go through the global
7057 offset table. The dynamic linker will use the .dynsym entry to
7058 determine the address it must put in the global offset table, so
7059 both the dynamic object and the regular object will refer to the
7060 same memory location for the variable. */
7061
7062 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7063 to copy the initial value out of the dynamic object and into the
7064 runtime process image. We need to remember the offset into the
7065 .rela.bss section we are going to use. */
7066 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7067 {
7068 htab->relbss->size += sizeof (Elf64_External_Rela);
7069 h->needs_copy = 1;
7070 }
7071
7072 s = htab->dynbss;
7073
7074 return _bfd_elf_adjust_dynamic_copy (h, s);
7075 }
7076
7077 /* If given a function descriptor symbol, hide both the function code
7078 sym and the descriptor. */
7079 static void
7080 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7081 struct elf_link_hash_entry *h,
7082 bfd_boolean force_local)
7083 {
7084 struct ppc_link_hash_entry *eh;
7085 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7086
7087 eh = (struct ppc_link_hash_entry *) h;
7088 if (eh->is_func_descriptor)
7089 {
7090 struct ppc_link_hash_entry *fh = eh->oh;
7091
7092 if (fh == NULL)
7093 {
7094 const char *p, *q;
7095 struct ppc_link_hash_table *htab;
7096 char save;
7097
7098 /* We aren't supposed to use alloca in BFD because on
7099 systems which do not have alloca the version in libiberty
7100 calls xmalloc, which might cause the program to crash
7101 when it runs out of memory. This function doesn't have a
7102 return status, so there's no way to gracefully return an
7103 error. So cheat. We know that string[-1] can be safely
7104 accessed; It's either a string in an ELF string table,
7105 or allocated in an objalloc structure. */
7106
7107 p = eh->elf.root.root.string - 1;
7108 save = *p;
7109 *(char *) p = '.';
7110 htab = ppc_hash_table (info);
7111 if (htab == NULL)
7112 return;
7113
7114 fh = (struct ppc_link_hash_entry *)
7115 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7116 *(char *) p = save;
7117
7118 /* Unfortunately, if it so happens that the string we were
7119 looking for was allocated immediately before this string,
7120 then we overwrote the string terminator. That's the only
7121 reason the lookup should fail. */
7122 if (fh == NULL)
7123 {
7124 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7125 while (q >= eh->elf.root.root.string && *q == *p)
7126 --q, --p;
7127 if (q < eh->elf.root.root.string && *p == '.')
7128 fh = (struct ppc_link_hash_entry *)
7129 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7130 }
7131 if (fh != NULL)
7132 {
7133 eh->oh = fh;
7134 fh->oh = eh;
7135 }
7136 }
7137 if (fh != NULL)
7138 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7139 }
7140 }
7141
7142 static bfd_boolean
7143 get_sym_h (struct elf_link_hash_entry **hp,
7144 Elf_Internal_Sym **symp,
7145 asection **symsecp,
7146 unsigned char **tls_maskp,
7147 Elf_Internal_Sym **locsymsp,
7148 unsigned long r_symndx,
7149 bfd *ibfd)
7150 {
7151 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7152
7153 if (r_symndx >= symtab_hdr->sh_info)
7154 {
7155 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7156 struct elf_link_hash_entry *h;
7157
7158 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7159 h = elf_follow_link (h);
7160
7161 if (hp != NULL)
7162 *hp = h;
7163
7164 if (symp != NULL)
7165 *symp = NULL;
7166
7167 if (symsecp != NULL)
7168 {
7169 asection *symsec = NULL;
7170 if (h->root.type == bfd_link_hash_defined
7171 || h->root.type == bfd_link_hash_defweak)
7172 symsec = h->root.u.def.section;
7173 *symsecp = symsec;
7174 }
7175
7176 if (tls_maskp != NULL)
7177 {
7178 struct ppc_link_hash_entry *eh;
7179
7180 eh = (struct ppc_link_hash_entry *) h;
7181 *tls_maskp = &eh->tls_mask;
7182 }
7183 }
7184 else
7185 {
7186 Elf_Internal_Sym *sym;
7187 Elf_Internal_Sym *locsyms = *locsymsp;
7188
7189 if (locsyms == NULL)
7190 {
7191 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7192 if (locsyms == NULL)
7193 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7194 symtab_hdr->sh_info,
7195 0, NULL, NULL, NULL);
7196 if (locsyms == NULL)
7197 return FALSE;
7198 *locsymsp = locsyms;
7199 }
7200 sym = locsyms + r_symndx;
7201
7202 if (hp != NULL)
7203 *hp = NULL;
7204
7205 if (symp != NULL)
7206 *symp = sym;
7207
7208 if (symsecp != NULL)
7209 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7210
7211 if (tls_maskp != NULL)
7212 {
7213 struct got_entry **lgot_ents;
7214 unsigned char *tls_mask;
7215
7216 tls_mask = NULL;
7217 lgot_ents = elf_local_got_ents (ibfd);
7218 if (lgot_ents != NULL)
7219 {
7220 struct plt_entry **local_plt = (struct plt_entry **)
7221 (lgot_ents + symtab_hdr->sh_info);
7222 unsigned char *lgot_masks = (unsigned char *)
7223 (local_plt + symtab_hdr->sh_info);
7224 tls_mask = &lgot_masks[r_symndx];
7225 }
7226 *tls_maskp = tls_mask;
7227 }
7228 }
7229 return TRUE;
7230 }
7231
7232 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7233 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7234 type suitable for optimization, and 1 otherwise. */
7235
7236 static int
7237 get_tls_mask (unsigned char **tls_maskp,
7238 unsigned long *toc_symndx,
7239 bfd_vma *toc_addend,
7240 Elf_Internal_Sym **locsymsp,
7241 const Elf_Internal_Rela *rel,
7242 bfd *ibfd)
7243 {
7244 unsigned long r_symndx;
7245 int next_r;
7246 struct elf_link_hash_entry *h;
7247 Elf_Internal_Sym *sym;
7248 asection *sec;
7249 bfd_vma off;
7250
7251 r_symndx = ELF64_R_SYM (rel->r_info);
7252 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7253 return 0;
7254
7255 if ((*tls_maskp != NULL && **tls_maskp != 0)
7256 || sec == NULL
7257 || ppc64_elf_section_data (sec) == NULL
7258 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7259 return 1;
7260
7261 /* Look inside a TOC section too. */
7262 if (h != NULL)
7263 {
7264 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7265 off = h->root.u.def.value;
7266 }
7267 else
7268 off = sym->st_value;
7269 off += rel->r_addend;
7270 BFD_ASSERT (off % 8 == 0);
7271 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7272 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7273 if (toc_symndx != NULL)
7274 *toc_symndx = r_symndx;
7275 if (toc_addend != NULL)
7276 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7277 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7278 return 0;
7279 if ((h == NULL || is_static_defined (h))
7280 && (next_r == -1 || next_r == -2))
7281 return 1 - next_r;
7282 return 1;
7283 }
7284
7285 /* Find (or create) an entry in the tocsave hash table. */
7286
7287 static struct tocsave_entry *
7288 tocsave_find (struct ppc_link_hash_table *htab,
7289 enum insert_option insert,
7290 Elf_Internal_Sym **local_syms,
7291 const Elf_Internal_Rela *irela,
7292 bfd *ibfd)
7293 {
7294 unsigned long r_indx;
7295 struct elf_link_hash_entry *h;
7296 Elf_Internal_Sym *sym;
7297 struct tocsave_entry ent, *p;
7298 hashval_t hash;
7299 struct tocsave_entry **slot;
7300
7301 r_indx = ELF64_R_SYM (irela->r_info);
7302 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7303 return NULL;
7304 if (ent.sec == NULL || ent.sec->output_section == NULL)
7305 {
7306 (*_bfd_error_handler)
7307 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7308 return NULL;
7309 }
7310
7311 if (h != NULL)
7312 ent.offset = h->root.u.def.value;
7313 else
7314 ent.offset = sym->st_value;
7315 ent.offset += irela->r_addend;
7316
7317 hash = tocsave_htab_hash (&ent);
7318 slot = ((struct tocsave_entry **)
7319 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7320 if (slot == NULL)
7321 return NULL;
7322
7323 if (*slot == NULL)
7324 {
7325 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7326 if (p == NULL)
7327 return NULL;
7328 *p = ent;
7329 *slot = p;
7330 }
7331 return *slot;
7332 }
7333
7334 /* Adjust all global syms defined in opd sections. In gcc generated
7335 code for the old ABI, these will already have been done. */
7336
7337 static bfd_boolean
7338 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7339 {
7340 struct ppc_link_hash_entry *eh;
7341 asection *sym_sec;
7342 struct _opd_sec_data *opd;
7343
7344 if (h->root.type == bfd_link_hash_indirect)
7345 return TRUE;
7346
7347 if (h->root.type != bfd_link_hash_defined
7348 && h->root.type != bfd_link_hash_defweak)
7349 return TRUE;
7350
7351 eh = (struct ppc_link_hash_entry *) h;
7352 if (eh->adjust_done)
7353 return TRUE;
7354
7355 sym_sec = eh->elf.root.u.def.section;
7356 opd = get_opd_info (sym_sec);
7357 if (opd != NULL && opd->adjust != NULL)
7358 {
7359 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7360 if (adjust == -1)
7361 {
7362 /* This entry has been deleted. */
7363 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7364 if (dsec == NULL)
7365 {
7366 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7367 if (discarded_section (dsec))
7368 {
7369 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7370 break;
7371 }
7372 }
7373 eh->elf.root.u.def.value = 0;
7374 eh->elf.root.u.def.section = dsec;
7375 }
7376 else
7377 eh->elf.root.u.def.value += adjust;
7378 eh->adjust_done = 1;
7379 }
7380 return TRUE;
7381 }
7382
7383 /* Handles decrementing dynamic reloc counts for the reloc specified by
7384 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7385 have already been determined. */
7386
7387 static bfd_boolean
7388 dec_dynrel_count (bfd_vma r_info,
7389 asection *sec,
7390 struct bfd_link_info *info,
7391 Elf_Internal_Sym **local_syms,
7392 struct elf_link_hash_entry *h,
7393 Elf_Internal_Sym *sym)
7394 {
7395 enum elf_ppc64_reloc_type r_type;
7396 asection *sym_sec = NULL;
7397
7398 /* Can this reloc be dynamic? This switch, and later tests here
7399 should be kept in sync with the code in check_relocs. */
7400 r_type = ELF64_R_TYPE (r_info);
7401 switch (r_type)
7402 {
7403 default:
7404 return TRUE;
7405
7406 case R_PPC64_TPREL16:
7407 case R_PPC64_TPREL16_LO:
7408 case R_PPC64_TPREL16_HI:
7409 case R_PPC64_TPREL16_HA:
7410 case R_PPC64_TPREL16_DS:
7411 case R_PPC64_TPREL16_LO_DS:
7412 case R_PPC64_TPREL16_HIGH:
7413 case R_PPC64_TPREL16_HIGHA:
7414 case R_PPC64_TPREL16_HIGHER:
7415 case R_PPC64_TPREL16_HIGHERA:
7416 case R_PPC64_TPREL16_HIGHEST:
7417 case R_PPC64_TPREL16_HIGHESTA:
7418 if (!info->shared)
7419 return TRUE;
7420
7421 case R_PPC64_TPREL64:
7422 case R_PPC64_DTPMOD64:
7423 case R_PPC64_DTPREL64:
7424 case R_PPC64_ADDR64:
7425 case R_PPC64_REL30:
7426 case R_PPC64_REL32:
7427 case R_PPC64_REL64:
7428 case R_PPC64_ADDR14:
7429 case R_PPC64_ADDR14_BRNTAKEN:
7430 case R_PPC64_ADDR14_BRTAKEN:
7431 case R_PPC64_ADDR16:
7432 case R_PPC64_ADDR16_DS:
7433 case R_PPC64_ADDR16_HA:
7434 case R_PPC64_ADDR16_HI:
7435 case R_PPC64_ADDR16_HIGH:
7436 case R_PPC64_ADDR16_HIGHA:
7437 case R_PPC64_ADDR16_HIGHER:
7438 case R_PPC64_ADDR16_HIGHERA:
7439 case R_PPC64_ADDR16_HIGHEST:
7440 case R_PPC64_ADDR16_HIGHESTA:
7441 case R_PPC64_ADDR16_LO:
7442 case R_PPC64_ADDR16_LO_DS:
7443 case R_PPC64_ADDR24:
7444 case R_PPC64_ADDR32:
7445 case R_PPC64_UADDR16:
7446 case R_PPC64_UADDR32:
7447 case R_PPC64_UADDR64:
7448 case R_PPC64_TOC:
7449 break;
7450 }
7451
7452 if (local_syms != NULL)
7453 {
7454 unsigned long r_symndx;
7455 bfd *ibfd = sec->owner;
7456
7457 r_symndx = ELF64_R_SYM (r_info);
7458 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7459 return FALSE;
7460 }
7461
7462 if ((info->shared
7463 && (must_be_dyn_reloc (info, r_type)
7464 || (h != NULL
7465 && (!SYMBOLIC_BIND (info, h)
7466 || h->root.type == bfd_link_hash_defweak
7467 || !h->def_regular))))
7468 || (ELIMINATE_COPY_RELOCS
7469 && !info->shared
7470 && h != NULL
7471 && (h->root.type == bfd_link_hash_defweak
7472 || !h->def_regular)))
7473 ;
7474 else
7475 return TRUE;
7476
7477 if (h != NULL)
7478 {
7479 struct elf_dyn_relocs *p;
7480 struct elf_dyn_relocs **pp;
7481 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7482
7483 /* elf_gc_sweep may have already removed all dyn relocs associated
7484 with local syms for a given section. Also, symbol flags are
7485 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7486 report a dynreloc miscount. */
7487 if (*pp == NULL && info->gc_sections)
7488 return TRUE;
7489
7490 while ((p = *pp) != NULL)
7491 {
7492 if (p->sec == sec)
7493 {
7494 if (!must_be_dyn_reloc (info, r_type))
7495 p->pc_count -= 1;
7496 p->count -= 1;
7497 if (p->count == 0)
7498 *pp = p->next;
7499 return TRUE;
7500 }
7501 pp = &p->next;
7502 }
7503 }
7504 else
7505 {
7506 struct ppc_dyn_relocs *p;
7507 struct ppc_dyn_relocs **pp;
7508 void *vpp;
7509 bfd_boolean is_ifunc;
7510
7511 if (local_syms == NULL)
7512 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7513 if (sym_sec == NULL)
7514 sym_sec = sec;
7515
7516 vpp = &elf_section_data (sym_sec)->local_dynrel;
7517 pp = (struct ppc_dyn_relocs **) vpp;
7518
7519 if (*pp == NULL && info->gc_sections)
7520 return TRUE;
7521
7522 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7523 while ((p = *pp) != NULL)
7524 {
7525 if (p->sec == sec && p->ifunc == is_ifunc)
7526 {
7527 p->count -= 1;
7528 if (p->count == 0)
7529 *pp = p->next;
7530 return TRUE;
7531 }
7532 pp = &p->next;
7533 }
7534 }
7535
7536 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7537 sec->owner, sec);
7538 bfd_set_error (bfd_error_bad_value);
7539 return FALSE;
7540 }
7541
7542 /* Remove unused Official Procedure Descriptor entries. Currently we
7543 only remove those associated with functions in discarded link-once
7544 sections, or weakly defined functions that have been overridden. It
7545 would be possible to remove many more entries for statically linked
7546 applications. */
7547
7548 bfd_boolean
7549 ppc64_elf_edit_opd (struct bfd_link_info *info)
7550 {
7551 bfd *ibfd;
7552 bfd_boolean some_edited = FALSE;
7553 asection *need_pad = NULL;
7554 struct ppc_link_hash_table *htab;
7555
7556 htab = ppc_hash_table (info);
7557 if (htab == NULL)
7558 return FALSE;
7559
7560 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7561 {
7562 asection *sec;
7563 Elf_Internal_Rela *relstart, *rel, *relend;
7564 Elf_Internal_Shdr *symtab_hdr;
7565 Elf_Internal_Sym *local_syms;
7566 bfd_vma offset;
7567 struct _opd_sec_data *opd;
7568 bfd_boolean need_edit, add_aux_fields;
7569 bfd_size_type cnt_16b = 0;
7570
7571 if (!is_ppc64_elf (ibfd))
7572 continue;
7573
7574 sec = bfd_get_section_by_name (ibfd, ".opd");
7575 if (sec == NULL || sec->size == 0)
7576 continue;
7577
7578 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7579 continue;
7580
7581 if (sec->output_section == bfd_abs_section_ptr)
7582 continue;
7583
7584 /* Look through the section relocs. */
7585 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7586 continue;
7587
7588 local_syms = NULL;
7589 symtab_hdr = &elf_symtab_hdr (ibfd);
7590
7591 /* Read the relocations. */
7592 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7593 info->keep_memory);
7594 if (relstart == NULL)
7595 return FALSE;
7596
7597 /* First run through the relocs to check they are sane, and to
7598 determine whether we need to edit this opd section. */
7599 need_edit = FALSE;
7600 need_pad = sec;
7601 offset = 0;
7602 relend = relstart + sec->reloc_count;
7603 for (rel = relstart; rel < relend; )
7604 {
7605 enum elf_ppc64_reloc_type r_type;
7606 unsigned long r_symndx;
7607 asection *sym_sec;
7608 struct elf_link_hash_entry *h;
7609 Elf_Internal_Sym *sym;
7610
7611 /* .opd contains a regular array of 16 or 24 byte entries. We're
7612 only interested in the reloc pointing to a function entry
7613 point. */
7614 if (rel->r_offset != offset
7615 || rel + 1 >= relend
7616 || (rel + 1)->r_offset != offset + 8)
7617 {
7618 /* If someone messes with .opd alignment then after a
7619 "ld -r" we might have padding in the middle of .opd.
7620 Also, there's nothing to prevent someone putting
7621 something silly in .opd with the assembler. No .opd
7622 optimization for them! */
7623 broken_opd:
7624 (*_bfd_error_handler)
7625 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7626 need_edit = FALSE;
7627 break;
7628 }
7629
7630 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7631 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7632 {
7633 (*_bfd_error_handler)
7634 (_("%B: unexpected reloc type %u in .opd section"),
7635 ibfd, r_type);
7636 need_edit = FALSE;
7637 break;
7638 }
7639
7640 r_symndx = ELF64_R_SYM (rel->r_info);
7641 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7642 r_symndx, ibfd))
7643 goto error_ret;
7644
7645 if (sym_sec == NULL || sym_sec->owner == NULL)
7646 {
7647 const char *sym_name;
7648 if (h != NULL)
7649 sym_name = h->root.root.string;
7650 else
7651 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7652 sym_sec);
7653
7654 (*_bfd_error_handler)
7655 (_("%B: undefined sym `%s' in .opd section"),
7656 ibfd, sym_name);
7657 need_edit = FALSE;
7658 break;
7659 }
7660
7661 /* opd entries are always for functions defined in the
7662 current input bfd. If the symbol isn't defined in the
7663 input bfd, then we won't be using the function in this
7664 bfd; It must be defined in a linkonce section in another
7665 bfd, or is weak. It's also possible that we are
7666 discarding the function due to a linker script /DISCARD/,
7667 which we test for via the output_section. */
7668 if (sym_sec->owner != ibfd
7669 || sym_sec->output_section == bfd_abs_section_ptr)
7670 need_edit = TRUE;
7671
7672 rel += 2;
7673 if (rel == relend
7674 || (rel + 1 == relend && rel->r_offset == offset + 16))
7675 {
7676 if (sec->size == offset + 24)
7677 {
7678 need_pad = NULL;
7679 break;
7680 }
7681 if (rel == relend && sec->size == offset + 16)
7682 {
7683 cnt_16b++;
7684 break;
7685 }
7686 goto broken_opd;
7687 }
7688
7689 if (rel->r_offset == offset + 24)
7690 offset += 24;
7691 else if (rel->r_offset != offset + 16)
7692 goto broken_opd;
7693 else if (rel + 1 < relend
7694 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7695 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7696 {
7697 offset += 16;
7698 cnt_16b++;
7699 }
7700 else if (rel + 2 < relend
7701 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7702 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7703 {
7704 offset += 24;
7705 rel += 1;
7706 }
7707 else
7708 goto broken_opd;
7709 }
7710
7711 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7712
7713 if (need_edit || add_aux_fields)
7714 {
7715 Elf_Internal_Rela *write_rel;
7716 Elf_Internal_Shdr *rel_hdr;
7717 bfd_byte *rptr, *wptr;
7718 bfd_byte *new_contents;
7719 bfd_boolean skip;
7720 long opd_ent_size;
7721 bfd_size_type amt;
7722
7723 new_contents = NULL;
7724 amt = sec->size * sizeof (long) / 8;
7725 opd = &ppc64_elf_section_data (sec)->u.opd;
7726 opd->adjust = bfd_zalloc (sec->owner, amt);
7727 if (opd->adjust == NULL)
7728 return FALSE;
7729 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7730
7731 /* This seems a waste of time as input .opd sections are all
7732 zeros as generated by gcc, but I suppose there's no reason
7733 this will always be so. We might start putting something in
7734 the third word of .opd entries. */
7735 if ((sec->flags & SEC_IN_MEMORY) == 0)
7736 {
7737 bfd_byte *loc;
7738 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7739 {
7740 if (loc != NULL)
7741 free (loc);
7742 error_ret:
7743 if (local_syms != NULL
7744 && symtab_hdr->contents != (unsigned char *) local_syms)
7745 free (local_syms);
7746 if (elf_section_data (sec)->relocs != relstart)
7747 free (relstart);
7748 return FALSE;
7749 }
7750 sec->contents = loc;
7751 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7752 }
7753
7754 elf_section_data (sec)->relocs = relstart;
7755
7756 new_contents = sec->contents;
7757 if (add_aux_fields)
7758 {
7759 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7760 if (new_contents == NULL)
7761 return FALSE;
7762 need_pad = FALSE;
7763 }
7764 wptr = new_contents;
7765 rptr = sec->contents;
7766
7767 write_rel = relstart;
7768 skip = FALSE;
7769 offset = 0;
7770 opd_ent_size = 0;
7771 for (rel = relstart; rel < relend; rel++)
7772 {
7773 unsigned long r_symndx;
7774 asection *sym_sec;
7775 struct elf_link_hash_entry *h;
7776 Elf_Internal_Sym *sym;
7777
7778 r_symndx = ELF64_R_SYM (rel->r_info);
7779 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7780 r_symndx, ibfd))
7781 goto error_ret;
7782
7783 if (rel->r_offset == offset)
7784 {
7785 struct ppc_link_hash_entry *fdh = NULL;
7786
7787 /* See if the .opd entry is full 24 byte or
7788 16 byte (with fd_aux entry overlapped with next
7789 fd_func). */
7790 opd_ent_size = 24;
7791 if ((rel + 2 == relend && sec->size == offset + 16)
7792 || (rel + 3 < relend
7793 && rel[2].r_offset == offset + 16
7794 && rel[3].r_offset == offset + 24
7795 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7796 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7797 opd_ent_size = 16;
7798
7799 if (h != NULL
7800 && h->root.root.string[0] == '.')
7801 {
7802 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7803 if (fdh != NULL
7804 && fdh->elf.root.type != bfd_link_hash_defined
7805 && fdh->elf.root.type != bfd_link_hash_defweak)
7806 fdh = NULL;
7807 }
7808
7809 skip = (sym_sec->owner != ibfd
7810 || sym_sec->output_section == bfd_abs_section_ptr);
7811 if (skip)
7812 {
7813 if (fdh != NULL && sym_sec->owner == ibfd)
7814 {
7815 /* Arrange for the function descriptor sym
7816 to be dropped. */
7817 fdh->elf.root.u.def.value = 0;
7818 fdh->elf.root.u.def.section = sym_sec;
7819 }
7820 opd->adjust[rel->r_offset / 8] = -1;
7821 }
7822 else
7823 {
7824 /* We'll be keeping this opd entry. */
7825
7826 if (fdh != NULL)
7827 {
7828 /* Redefine the function descriptor symbol to
7829 this location in the opd section. It is
7830 necessary to update the value here rather
7831 than using an array of adjustments as we do
7832 for local symbols, because various places
7833 in the generic ELF code use the value
7834 stored in u.def.value. */
7835 fdh->elf.root.u.def.value = wptr - new_contents;
7836 fdh->adjust_done = 1;
7837 }
7838
7839 /* Local syms are a bit tricky. We could
7840 tweak them as they can be cached, but
7841 we'd need to look through the local syms
7842 for the function descriptor sym which we
7843 don't have at the moment. So keep an
7844 array of adjustments. */
7845 opd->adjust[rel->r_offset / 8]
7846 = (wptr - new_contents) - (rptr - sec->contents);
7847
7848 if (wptr != rptr)
7849 memcpy (wptr, rptr, opd_ent_size);
7850 wptr += opd_ent_size;
7851 if (add_aux_fields && opd_ent_size == 16)
7852 {
7853 memset (wptr, '\0', 8);
7854 wptr += 8;
7855 }
7856 }
7857 rptr += opd_ent_size;
7858 offset += opd_ent_size;
7859 }
7860
7861 if (skip)
7862 {
7863 if (!NO_OPD_RELOCS
7864 && !info->relocatable
7865 && !dec_dynrel_count (rel->r_info, sec, info,
7866 NULL, h, sym))
7867 goto error_ret;
7868 }
7869 else
7870 {
7871 /* We need to adjust any reloc offsets to point to the
7872 new opd entries. While we're at it, we may as well
7873 remove redundant relocs. */
7874 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7875 if (write_rel != rel)
7876 memcpy (write_rel, rel, sizeof (*rel));
7877 ++write_rel;
7878 }
7879 }
7880
7881 sec->size = wptr - new_contents;
7882 sec->reloc_count = write_rel - relstart;
7883 if (add_aux_fields)
7884 {
7885 free (sec->contents);
7886 sec->contents = new_contents;
7887 }
7888
7889 /* Fudge the header size too, as this is used later in
7890 elf_bfd_final_link if we are emitting relocs. */
7891 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7892 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7893 some_edited = TRUE;
7894 }
7895 else if (elf_section_data (sec)->relocs != relstart)
7896 free (relstart);
7897
7898 if (local_syms != NULL
7899 && symtab_hdr->contents != (unsigned char *) local_syms)
7900 {
7901 if (!info->keep_memory)
7902 free (local_syms);
7903 else
7904 symtab_hdr->contents = (unsigned char *) local_syms;
7905 }
7906 }
7907
7908 if (some_edited)
7909 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7910
7911 /* If we are doing a final link and the last .opd entry is just 16 byte
7912 long, add a 8 byte padding after it. */
7913 if (need_pad != NULL && !info->relocatable)
7914 {
7915 bfd_byte *p;
7916
7917 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7918 {
7919 BFD_ASSERT (need_pad->size > 0);
7920
7921 p = bfd_malloc (need_pad->size + 8);
7922 if (p == NULL)
7923 return FALSE;
7924
7925 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7926 p, 0, need_pad->size))
7927 return FALSE;
7928
7929 need_pad->contents = p;
7930 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7931 }
7932 else
7933 {
7934 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7935 if (p == NULL)
7936 return FALSE;
7937
7938 need_pad->contents = p;
7939 }
7940
7941 memset (need_pad->contents + need_pad->size, 0, 8);
7942 need_pad->size += 8;
7943 }
7944
7945 return TRUE;
7946 }
7947
7948 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7949
7950 asection *
7951 ppc64_elf_tls_setup (struct bfd_link_info *info)
7952 {
7953 struct ppc_link_hash_table *htab;
7954
7955 htab = ppc_hash_table (info);
7956 if (htab == NULL)
7957 return NULL;
7958
7959 if (abiversion (info->output_bfd) == 1)
7960 htab->opd_abi = 1;
7961
7962 if (htab->params->no_multi_toc)
7963 htab->do_multi_toc = 0;
7964 else if (!htab->do_multi_toc)
7965 htab->params->no_multi_toc = 1;
7966
7967 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7968 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7969 FALSE, FALSE, TRUE));
7970 /* Move dynamic linking info to the function descriptor sym. */
7971 if (htab->tls_get_addr != NULL)
7972 func_desc_adjust (&htab->tls_get_addr->elf, info);
7973 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7974 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7975 FALSE, FALSE, TRUE));
7976 if (!htab->params->no_tls_get_addr_opt)
7977 {
7978 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7979
7980 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7981 FALSE, FALSE, TRUE);
7982 if (opt != NULL)
7983 func_desc_adjust (opt, info);
7984 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7985 FALSE, FALSE, TRUE);
7986 if (opt_fd != NULL
7987 && (opt_fd->root.type == bfd_link_hash_defined
7988 || opt_fd->root.type == bfd_link_hash_defweak))
7989 {
7990 /* If glibc supports an optimized __tls_get_addr call stub,
7991 signalled by the presence of __tls_get_addr_opt, and we'll
7992 be calling __tls_get_addr via a plt call stub, then
7993 make __tls_get_addr point to __tls_get_addr_opt. */
7994 tga_fd = &htab->tls_get_addr_fd->elf;
7995 if (htab->elf.dynamic_sections_created
7996 && tga_fd != NULL
7997 && (tga_fd->type == STT_FUNC
7998 || tga_fd->needs_plt)
7999 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8000 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8001 && tga_fd->root.type == bfd_link_hash_undefweak)))
8002 {
8003 struct plt_entry *ent;
8004
8005 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8006 if (ent->plt.refcount > 0)
8007 break;
8008 if (ent != NULL)
8009 {
8010 tga_fd->root.type = bfd_link_hash_indirect;
8011 tga_fd->root.u.i.link = &opt_fd->root;
8012 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8013 if (opt_fd->dynindx != -1)
8014 {
8015 /* Use __tls_get_addr_opt in dynamic relocations. */
8016 opt_fd->dynindx = -1;
8017 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8018 opt_fd->dynstr_index);
8019 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8020 return NULL;
8021 }
8022 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8023 tga = &htab->tls_get_addr->elf;
8024 if (opt != NULL && tga != NULL)
8025 {
8026 tga->root.type = bfd_link_hash_indirect;
8027 tga->root.u.i.link = &opt->root;
8028 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8029 _bfd_elf_link_hash_hide_symbol (info, opt,
8030 tga->forced_local);
8031 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8032 }
8033 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8034 htab->tls_get_addr_fd->is_func_descriptor = 1;
8035 if (htab->tls_get_addr != NULL)
8036 {
8037 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8038 htab->tls_get_addr->is_func = 1;
8039 }
8040 }
8041 }
8042 }
8043 else
8044 htab->params->no_tls_get_addr_opt = TRUE;
8045 }
8046 return _bfd_elf_tls_setup (info->output_bfd, info);
8047 }
8048
8049 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8050 HASH1 or HASH2. */
8051
8052 static bfd_boolean
8053 branch_reloc_hash_match (const bfd *ibfd,
8054 const Elf_Internal_Rela *rel,
8055 const struct ppc_link_hash_entry *hash1,
8056 const struct ppc_link_hash_entry *hash2)
8057 {
8058 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8059 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8060 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8061
8062 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8063 {
8064 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8065 struct elf_link_hash_entry *h;
8066
8067 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8068 h = elf_follow_link (h);
8069 if (h == &hash1->elf || h == &hash2->elf)
8070 return TRUE;
8071 }
8072 return FALSE;
8073 }
8074
8075 /* Run through all the TLS relocs looking for optimization
8076 opportunities. The linker has been hacked (see ppc64elf.em) to do
8077 a preliminary section layout so that we know the TLS segment
8078 offsets. We can't optimize earlier because some optimizations need
8079 to know the tp offset, and we need to optimize before allocating
8080 dynamic relocations. */
8081
8082 bfd_boolean
8083 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8084 {
8085 bfd *ibfd;
8086 asection *sec;
8087 struct ppc_link_hash_table *htab;
8088 unsigned char *toc_ref;
8089 int pass;
8090
8091 if (info->relocatable || !info->executable)
8092 return TRUE;
8093
8094 htab = ppc_hash_table (info);
8095 if (htab == NULL)
8096 return FALSE;
8097
8098 /* Make two passes over the relocs. On the first pass, mark toc
8099 entries involved with tls relocs, and check that tls relocs
8100 involved in setting up a tls_get_addr call are indeed followed by
8101 such a call. If they are not, we can't do any tls optimization.
8102 On the second pass twiddle tls_mask flags to notify
8103 relocate_section that optimization can be done, and adjust got
8104 and plt refcounts. */
8105 toc_ref = NULL;
8106 for (pass = 0; pass < 2; ++pass)
8107 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8108 {
8109 Elf_Internal_Sym *locsyms = NULL;
8110 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8111
8112 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8113 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8114 {
8115 Elf_Internal_Rela *relstart, *rel, *relend;
8116 bfd_boolean found_tls_get_addr_arg = 0;
8117
8118 /* Read the relocations. */
8119 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8120 info->keep_memory);
8121 if (relstart == NULL)
8122 {
8123 free (toc_ref);
8124 return FALSE;
8125 }
8126
8127 relend = relstart + sec->reloc_count;
8128 for (rel = relstart; rel < relend; rel++)
8129 {
8130 enum elf_ppc64_reloc_type r_type;
8131 unsigned long r_symndx;
8132 struct elf_link_hash_entry *h;
8133 Elf_Internal_Sym *sym;
8134 asection *sym_sec;
8135 unsigned char *tls_mask;
8136 unsigned char tls_set, tls_clear, tls_type = 0;
8137 bfd_vma value;
8138 bfd_boolean ok_tprel, is_local;
8139 long toc_ref_index = 0;
8140 int expecting_tls_get_addr = 0;
8141 bfd_boolean ret = FALSE;
8142
8143 r_symndx = ELF64_R_SYM (rel->r_info);
8144 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8145 r_symndx, ibfd))
8146 {
8147 err_free_rel:
8148 if (elf_section_data (sec)->relocs != relstart)
8149 free (relstart);
8150 if (toc_ref != NULL)
8151 free (toc_ref);
8152 if (locsyms != NULL
8153 && (elf_symtab_hdr (ibfd).contents
8154 != (unsigned char *) locsyms))
8155 free (locsyms);
8156 return ret;
8157 }
8158
8159 if (h != NULL)
8160 {
8161 if (h->root.type == bfd_link_hash_defined
8162 || h->root.type == bfd_link_hash_defweak)
8163 value = h->root.u.def.value;
8164 else if (h->root.type == bfd_link_hash_undefweak)
8165 value = 0;
8166 else
8167 {
8168 found_tls_get_addr_arg = 0;
8169 continue;
8170 }
8171 }
8172 else
8173 /* Symbols referenced by TLS relocs must be of type
8174 STT_TLS. So no need for .opd local sym adjust. */
8175 value = sym->st_value;
8176
8177 ok_tprel = FALSE;
8178 is_local = FALSE;
8179 if (h == NULL
8180 || !h->def_dynamic)
8181 {
8182 is_local = TRUE;
8183 if (h != NULL
8184 && h->root.type == bfd_link_hash_undefweak)
8185 ok_tprel = TRUE;
8186 else
8187 {
8188 value += sym_sec->output_offset;
8189 value += sym_sec->output_section->vma;
8190 value -= htab->elf.tls_sec->vma;
8191 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8192 < (bfd_vma) 1 << 32);
8193 }
8194 }
8195
8196 r_type = ELF64_R_TYPE (rel->r_info);
8197 /* If this section has old-style __tls_get_addr calls
8198 without marker relocs, then check that each
8199 __tls_get_addr call reloc is preceded by a reloc
8200 that conceivably belongs to the __tls_get_addr arg
8201 setup insn. If we don't find matching arg setup
8202 relocs, don't do any tls optimization. */
8203 if (pass == 0
8204 && sec->has_tls_get_addr_call
8205 && h != NULL
8206 && (h == &htab->tls_get_addr->elf
8207 || h == &htab->tls_get_addr_fd->elf)
8208 && !found_tls_get_addr_arg
8209 && is_branch_reloc (r_type))
8210 {
8211 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8212 "TLS optimization disabled\n"),
8213 ibfd, sec, rel->r_offset);
8214 ret = TRUE;
8215 goto err_free_rel;
8216 }
8217
8218 found_tls_get_addr_arg = 0;
8219 switch (r_type)
8220 {
8221 case R_PPC64_GOT_TLSLD16:
8222 case R_PPC64_GOT_TLSLD16_LO:
8223 expecting_tls_get_addr = 1;
8224 found_tls_get_addr_arg = 1;
8225 /* Fall thru */
8226
8227 case R_PPC64_GOT_TLSLD16_HI:
8228 case R_PPC64_GOT_TLSLD16_HA:
8229 /* These relocs should never be against a symbol
8230 defined in a shared lib. Leave them alone if
8231 that turns out to be the case. */
8232 if (!is_local)
8233 continue;
8234
8235 /* LD -> LE */
8236 tls_set = 0;
8237 tls_clear = TLS_LD;
8238 tls_type = TLS_TLS | TLS_LD;
8239 break;
8240
8241 case R_PPC64_GOT_TLSGD16:
8242 case R_PPC64_GOT_TLSGD16_LO:
8243 expecting_tls_get_addr = 1;
8244 found_tls_get_addr_arg = 1;
8245 /* Fall thru */
8246
8247 case R_PPC64_GOT_TLSGD16_HI:
8248 case R_PPC64_GOT_TLSGD16_HA:
8249 if (ok_tprel)
8250 /* GD -> LE */
8251 tls_set = 0;
8252 else
8253 /* GD -> IE */
8254 tls_set = TLS_TLS | TLS_TPRELGD;
8255 tls_clear = TLS_GD;
8256 tls_type = TLS_TLS | TLS_GD;
8257 break;
8258
8259 case R_PPC64_GOT_TPREL16_DS:
8260 case R_PPC64_GOT_TPREL16_LO_DS:
8261 case R_PPC64_GOT_TPREL16_HI:
8262 case R_PPC64_GOT_TPREL16_HA:
8263 if (ok_tprel)
8264 {
8265 /* IE -> LE */
8266 tls_set = 0;
8267 tls_clear = TLS_TPREL;
8268 tls_type = TLS_TLS | TLS_TPREL;
8269 break;
8270 }
8271 continue;
8272
8273 case R_PPC64_TLSGD:
8274 case R_PPC64_TLSLD:
8275 found_tls_get_addr_arg = 1;
8276 /* Fall thru */
8277
8278 case R_PPC64_TLS:
8279 case R_PPC64_TOC16:
8280 case R_PPC64_TOC16_LO:
8281 if (sym_sec == NULL || sym_sec != toc)
8282 continue;
8283
8284 /* Mark this toc entry as referenced by a TLS
8285 code sequence. We can do that now in the
8286 case of R_PPC64_TLS, and after checking for
8287 tls_get_addr for the TOC16 relocs. */
8288 if (toc_ref == NULL)
8289 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8290 if (toc_ref == NULL)
8291 goto err_free_rel;
8292
8293 if (h != NULL)
8294 value = h->root.u.def.value;
8295 else
8296 value = sym->st_value;
8297 value += rel->r_addend;
8298 BFD_ASSERT (value < toc->size && value % 8 == 0);
8299 toc_ref_index = (value + toc->output_offset) / 8;
8300 if (r_type == R_PPC64_TLS
8301 || r_type == R_PPC64_TLSGD
8302 || r_type == R_PPC64_TLSLD)
8303 {
8304 toc_ref[toc_ref_index] = 1;
8305 continue;
8306 }
8307
8308 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8309 continue;
8310
8311 tls_set = 0;
8312 tls_clear = 0;
8313 expecting_tls_get_addr = 2;
8314 break;
8315
8316 case R_PPC64_TPREL64:
8317 if (pass == 0
8318 || sec != toc
8319 || toc_ref == NULL
8320 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8321 continue;
8322 if (ok_tprel)
8323 {
8324 /* IE -> LE */
8325 tls_set = TLS_EXPLICIT;
8326 tls_clear = TLS_TPREL;
8327 break;
8328 }
8329 continue;
8330
8331 case R_PPC64_DTPMOD64:
8332 if (pass == 0
8333 || sec != toc
8334 || toc_ref == NULL
8335 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8336 continue;
8337 if (rel + 1 < relend
8338 && (rel[1].r_info
8339 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8340 && rel[1].r_offset == rel->r_offset + 8)
8341 {
8342 if (ok_tprel)
8343 /* GD -> LE */
8344 tls_set = TLS_EXPLICIT | TLS_GD;
8345 else
8346 /* GD -> IE */
8347 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8348 tls_clear = TLS_GD;
8349 }
8350 else
8351 {
8352 if (!is_local)
8353 continue;
8354
8355 /* LD -> LE */
8356 tls_set = TLS_EXPLICIT;
8357 tls_clear = TLS_LD;
8358 }
8359 break;
8360
8361 default:
8362 continue;
8363 }
8364
8365 if (pass == 0)
8366 {
8367 if (!expecting_tls_get_addr
8368 || !sec->has_tls_get_addr_call)
8369 continue;
8370
8371 if (rel + 1 < relend
8372 && branch_reloc_hash_match (ibfd, rel + 1,
8373 htab->tls_get_addr,
8374 htab->tls_get_addr_fd))
8375 {
8376 if (expecting_tls_get_addr == 2)
8377 {
8378 /* Check for toc tls entries. */
8379 unsigned char *toc_tls;
8380 int retval;
8381
8382 retval = get_tls_mask (&toc_tls, NULL, NULL,
8383 &locsyms,
8384 rel, ibfd);
8385 if (retval == 0)
8386 goto err_free_rel;
8387 if (toc_tls != NULL)
8388 {
8389 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8390 found_tls_get_addr_arg = 1;
8391 if (retval > 1)
8392 toc_ref[toc_ref_index] = 1;
8393 }
8394 }
8395 continue;
8396 }
8397
8398 if (expecting_tls_get_addr != 1)
8399 continue;
8400
8401 /* Uh oh, we didn't find the expected call. We
8402 could just mark this symbol to exclude it
8403 from tls optimization but it's safer to skip
8404 the entire optimization. */
8405 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8406 "TLS optimization disabled\n"),
8407 ibfd, sec, rel->r_offset);
8408 ret = TRUE;
8409 goto err_free_rel;
8410 }
8411
8412 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8413 {
8414 struct plt_entry *ent;
8415 for (ent = htab->tls_get_addr->elf.plt.plist;
8416 ent != NULL;
8417 ent = ent->next)
8418 if (ent->addend == 0)
8419 {
8420 if (ent->plt.refcount > 0)
8421 {
8422 ent->plt.refcount -= 1;
8423 expecting_tls_get_addr = 0;
8424 }
8425 break;
8426 }
8427 }
8428
8429 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8430 {
8431 struct plt_entry *ent;
8432 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8433 ent != NULL;
8434 ent = ent->next)
8435 if (ent->addend == 0)
8436 {
8437 if (ent->plt.refcount > 0)
8438 ent->plt.refcount -= 1;
8439 break;
8440 }
8441 }
8442
8443 if (tls_clear == 0)
8444 continue;
8445
8446 if ((tls_set & TLS_EXPLICIT) == 0)
8447 {
8448 struct got_entry *ent;
8449
8450 /* Adjust got entry for this reloc. */
8451 if (h != NULL)
8452 ent = h->got.glist;
8453 else
8454 ent = elf_local_got_ents (ibfd)[r_symndx];
8455
8456 for (; ent != NULL; ent = ent->next)
8457 if (ent->addend == rel->r_addend
8458 && ent->owner == ibfd
8459 && ent->tls_type == tls_type)
8460 break;
8461 if (ent == NULL)
8462 abort ();
8463
8464 if (tls_set == 0)
8465 {
8466 /* We managed to get rid of a got entry. */
8467 if (ent->got.refcount > 0)
8468 ent->got.refcount -= 1;
8469 }
8470 }
8471 else
8472 {
8473 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8474 we'll lose one or two dyn relocs. */
8475 if (!dec_dynrel_count (rel->r_info, sec, info,
8476 NULL, h, sym))
8477 return FALSE;
8478
8479 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8480 {
8481 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8482 NULL, h, sym))
8483 return FALSE;
8484 }
8485 }
8486
8487 *tls_mask |= tls_set;
8488 *tls_mask &= ~tls_clear;
8489 }
8490
8491 if (elf_section_data (sec)->relocs != relstart)
8492 free (relstart);
8493 }
8494
8495 if (locsyms != NULL
8496 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8497 {
8498 if (!info->keep_memory)
8499 free (locsyms);
8500 else
8501 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8502 }
8503 }
8504
8505 if (toc_ref != NULL)
8506 free (toc_ref);
8507 return TRUE;
8508 }
8509
8510 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8511 the values of any global symbols in a toc section that has been
8512 edited. Globals in toc sections should be a rarity, so this function
8513 sets a flag if any are found in toc sections other than the one just
8514 edited, so that futher hash table traversals can be avoided. */
8515
8516 struct adjust_toc_info
8517 {
8518 asection *toc;
8519 unsigned long *skip;
8520 bfd_boolean global_toc_syms;
8521 };
8522
8523 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8524
8525 static bfd_boolean
8526 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8527 {
8528 struct ppc_link_hash_entry *eh;
8529 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8530 unsigned long i;
8531
8532 if (h->root.type != bfd_link_hash_defined
8533 && h->root.type != bfd_link_hash_defweak)
8534 return TRUE;
8535
8536 eh = (struct ppc_link_hash_entry *) h;
8537 if (eh->adjust_done)
8538 return TRUE;
8539
8540 if (eh->elf.root.u.def.section == toc_inf->toc)
8541 {
8542 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8543 i = toc_inf->toc->rawsize >> 3;
8544 else
8545 i = eh->elf.root.u.def.value >> 3;
8546
8547 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8548 {
8549 (*_bfd_error_handler)
8550 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8551 do
8552 ++i;
8553 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8554 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8555 }
8556
8557 eh->elf.root.u.def.value -= toc_inf->skip[i];
8558 eh->adjust_done = 1;
8559 }
8560 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8561 toc_inf->global_toc_syms = TRUE;
8562
8563 return TRUE;
8564 }
8565
8566 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8567
8568 static bfd_boolean
8569 ok_lo_toc_insn (unsigned int insn)
8570 {
8571 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8572 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8573 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8574 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8575 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8576 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8577 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8578 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8579 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8580 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8581 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8582 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8583 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8584 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8585 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8586 && (insn & 3) != 1)
8587 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8588 && ((insn & 3) == 0 || (insn & 3) == 3))
8589 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8590 }
8591
8592 /* Examine all relocs referencing .toc sections in order to remove
8593 unused .toc entries. */
8594
8595 bfd_boolean
8596 ppc64_elf_edit_toc (struct bfd_link_info *info)
8597 {
8598 bfd *ibfd;
8599 struct adjust_toc_info toc_inf;
8600 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8601
8602 htab->do_toc_opt = 1;
8603 toc_inf.global_toc_syms = TRUE;
8604 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8605 {
8606 asection *toc, *sec;
8607 Elf_Internal_Shdr *symtab_hdr;
8608 Elf_Internal_Sym *local_syms;
8609 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8610 unsigned long *skip, *drop;
8611 unsigned char *used;
8612 unsigned char *keep, last, some_unused;
8613
8614 if (!is_ppc64_elf (ibfd))
8615 continue;
8616
8617 toc = bfd_get_section_by_name (ibfd, ".toc");
8618 if (toc == NULL
8619 || toc->size == 0
8620 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8621 || discarded_section (toc))
8622 continue;
8623
8624 toc_relocs = NULL;
8625 local_syms = NULL;
8626 symtab_hdr = &elf_symtab_hdr (ibfd);
8627
8628 /* Look at sections dropped from the final link. */
8629 skip = NULL;
8630 relstart = NULL;
8631 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8632 {
8633 if (sec->reloc_count == 0
8634 || !discarded_section (sec)
8635 || get_opd_info (sec)
8636 || (sec->flags & SEC_ALLOC) == 0
8637 || (sec->flags & SEC_DEBUGGING) != 0)
8638 continue;
8639
8640 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8641 if (relstart == NULL)
8642 goto error_ret;
8643
8644 /* Run through the relocs to see which toc entries might be
8645 unused. */
8646 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8647 {
8648 enum elf_ppc64_reloc_type r_type;
8649 unsigned long r_symndx;
8650 asection *sym_sec;
8651 struct elf_link_hash_entry *h;
8652 Elf_Internal_Sym *sym;
8653 bfd_vma val;
8654
8655 r_type = ELF64_R_TYPE (rel->r_info);
8656 switch (r_type)
8657 {
8658 default:
8659 continue;
8660
8661 case R_PPC64_TOC16:
8662 case R_PPC64_TOC16_LO:
8663 case R_PPC64_TOC16_HI:
8664 case R_PPC64_TOC16_HA:
8665 case R_PPC64_TOC16_DS:
8666 case R_PPC64_TOC16_LO_DS:
8667 break;
8668 }
8669
8670 r_symndx = ELF64_R_SYM (rel->r_info);
8671 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8672 r_symndx, ibfd))
8673 goto error_ret;
8674
8675 if (sym_sec != toc)
8676 continue;
8677
8678 if (h != NULL)
8679 val = h->root.u.def.value;
8680 else
8681 val = sym->st_value;
8682 val += rel->r_addend;
8683
8684 if (val >= toc->size)
8685 continue;
8686
8687 /* Anything in the toc ought to be aligned to 8 bytes.
8688 If not, don't mark as unused. */
8689 if (val & 7)
8690 continue;
8691
8692 if (skip == NULL)
8693 {
8694 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8695 if (skip == NULL)
8696 goto error_ret;
8697 }
8698
8699 skip[val >> 3] = ref_from_discarded;
8700 }
8701
8702 if (elf_section_data (sec)->relocs != relstart)
8703 free (relstart);
8704 }
8705
8706 /* For largetoc loads of address constants, we can convert
8707 . addis rx,2,addr@got@ha
8708 . ld ry,addr@got@l(rx)
8709 to
8710 . addis rx,2,addr@toc@ha
8711 . addi ry,rx,addr@toc@l
8712 when addr is within 2G of the toc pointer. This then means
8713 that the word storing "addr" in the toc is no longer needed. */
8714
8715 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8716 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8717 && toc->reloc_count != 0)
8718 {
8719 /* Read toc relocs. */
8720 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8721 info->keep_memory);
8722 if (toc_relocs == NULL)
8723 goto error_ret;
8724
8725 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8726 {
8727 enum elf_ppc64_reloc_type r_type;
8728 unsigned long r_symndx;
8729 asection *sym_sec;
8730 struct elf_link_hash_entry *h;
8731 Elf_Internal_Sym *sym;
8732 bfd_vma val, addr;
8733
8734 r_type = ELF64_R_TYPE (rel->r_info);
8735 if (r_type != R_PPC64_ADDR64)
8736 continue;
8737
8738 r_symndx = ELF64_R_SYM (rel->r_info);
8739 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8740 r_symndx, ibfd))
8741 goto error_ret;
8742
8743 if (sym_sec == NULL
8744 || discarded_section (sym_sec))
8745 continue;
8746
8747 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8748 continue;
8749
8750 if (h != NULL)
8751 {
8752 if (h->type == STT_GNU_IFUNC)
8753 continue;
8754 val = h->root.u.def.value;
8755 }
8756 else
8757 {
8758 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8759 continue;
8760 val = sym->st_value;
8761 }
8762 val += rel->r_addend;
8763 val += sym_sec->output_section->vma + sym_sec->output_offset;
8764
8765 /* We don't yet know the exact toc pointer value, but we
8766 know it will be somewhere in the toc section. Don't
8767 optimize if the difference from any possible toc
8768 pointer is outside [ff..f80008000, 7fff7fff]. */
8769 addr = toc->output_section->vma + TOC_BASE_OFF;
8770 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8771 continue;
8772
8773 addr = toc->output_section->vma + toc->output_section->rawsize;
8774 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8775 continue;
8776
8777 if (skip == NULL)
8778 {
8779 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8780 if (skip == NULL)
8781 goto error_ret;
8782 }
8783
8784 skip[rel->r_offset >> 3]
8785 |= can_optimize | ((rel - toc_relocs) << 2);
8786 }
8787 }
8788
8789 if (skip == NULL)
8790 continue;
8791
8792 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8793 if (used == NULL)
8794 {
8795 error_ret:
8796 if (local_syms != NULL
8797 && symtab_hdr->contents != (unsigned char *) local_syms)
8798 free (local_syms);
8799 if (sec != NULL
8800 && relstart != NULL
8801 && elf_section_data (sec)->relocs != relstart)
8802 free (relstart);
8803 if (toc_relocs != NULL
8804 && elf_section_data (toc)->relocs != toc_relocs)
8805 free (toc_relocs);
8806 if (skip != NULL)
8807 free (skip);
8808 return FALSE;
8809 }
8810
8811 /* Now check all kept sections that might reference the toc.
8812 Check the toc itself last. */
8813 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8814 : ibfd->sections);
8815 sec != NULL;
8816 sec = (sec == toc ? NULL
8817 : sec->next == NULL ? toc
8818 : sec->next == toc && toc->next ? toc->next
8819 : sec->next))
8820 {
8821 int repeat;
8822
8823 if (sec->reloc_count == 0
8824 || discarded_section (sec)
8825 || get_opd_info (sec)
8826 || (sec->flags & SEC_ALLOC) == 0
8827 || (sec->flags & SEC_DEBUGGING) != 0)
8828 continue;
8829
8830 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8831 info->keep_memory);
8832 if (relstart == NULL)
8833 {
8834 free (used);
8835 goto error_ret;
8836 }
8837
8838 /* Mark toc entries referenced as used. */
8839 do
8840 {
8841 repeat = 0;
8842 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8843 {
8844 enum elf_ppc64_reloc_type r_type;
8845 unsigned long r_symndx;
8846 asection *sym_sec;
8847 struct elf_link_hash_entry *h;
8848 Elf_Internal_Sym *sym;
8849 bfd_vma val;
8850 enum {no_check, check_lo, check_ha} insn_check;
8851
8852 r_type = ELF64_R_TYPE (rel->r_info);
8853 switch (r_type)
8854 {
8855 default:
8856 insn_check = no_check;
8857 break;
8858
8859 case R_PPC64_GOT_TLSLD16_HA:
8860 case R_PPC64_GOT_TLSGD16_HA:
8861 case R_PPC64_GOT_TPREL16_HA:
8862 case R_PPC64_GOT_DTPREL16_HA:
8863 case R_PPC64_GOT16_HA:
8864 case R_PPC64_TOC16_HA:
8865 insn_check = check_ha;
8866 break;
8867
8868 case R_PPC64_GOT_TLSLD16_LO:
8869 case R_PPC64_GOT_TLSGD16_LO:
8870 case R_PPC64_GOT_TPREL16_LO_DS:
8871 case R_PPC64_GOT_DTPREL16_LO_DS:
8872 case R_PPC64_GOT16_LO:
8873 case R_PPC64_GOT16_LO_DS:
8874 case R_PPC64_TOC16_LO:
8875 case R_PPC64_TOC16_LO_DS:
8876 insn_check = check_lo;
8877 break;
8878 }
8879
8880 if (insn_check != no_check)
8881 {
8882 bfd_vma off = rel->r_offset & ~3;
8883 unsigned char buf[4];
8884 unsigned int insn;
8885
8886 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8887 {
8888 free (used);
8889 goto error_ret;
8890 }
8891 insn = bfd_get_32 (ibfd, buf);
8892 if (insn_check == check_lo
8893 ? !ok_lo_toc_insn (insn)
8894 : ((insn & ((0x3f << 26) | 0x1f << 16))
8895 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8896 {
8897 char str[12];
8898
8899 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8900 sprintf (str, "%#08x", insn);
8901 info->callbacks->einfo
8902 (_("%P: %H: toc optimization is not supported for"
8903 " %s instruction.\n"),
8904 ibfd, sec, rel->r_offset & ~3, str);
8905 }
8906 }
8907
8908 switch (r_type)
8909 {
8910 case R_PPC64_TOC16:
8911 case R_PPC64_TOC16_LO:
8912 case R_PPC64_TOC16_HI:
8913 case R_PPC64_TOC16_HA:
8914 case R_PPC64_TOC16_DS:
8915 case R_PPC64_TOC16_LO_DS:
8916 /* In case we're taking addresses of toc entries. */
8917 case R_PPC64_ADDR64:
8918 break;
8919
8920 default:
8921 continue;
8922 }
8923
8924 r_symndx = ELF64_R_SYM (rel->r_info);
8925 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8926 r_symndx, ibfd))
8927 {
8928 free (used);
8929 goto error_ret;
8930 }
8931
8932 if (sym_sec != toc)
8933 continue;
8934
8935 if (h != NULL)
8936 val = h->root.u.def.value;
8937 else
8938 val = sym->st_value;
8939 val += rel->r_addend;
8940
8941 if (val >= toc->size)
8942 continue;
8943
8944 if ((skip[val >> 3] & can_optimize) != 0)
8945 {
8946 bfd_vma off;
8947 unsigned char opc;
8948
8949 switch (r_type)
8950 {
8951 case R_PPC64_TOC16_HA:
8952 break;
8953
8954 case R_PPC64_TOC16_LO_DS:
8955 off = rel->r_offset;
8956 off += (bfd_big_endian (ibfd) ? -2 : 3);
8957 if (!bfd_get_section_contents (ibfd, sec, &opc,
8958 off, 1))
8959 {
8960 free (used);
8961 goto error_ret;
8962 }
8963 if ((opc & (0x3f << 2)) == (58u << 2))
8964 break;
8965 /* Fall thru */
8966
8967 default:
8968 /* Wrong sort of reloc, or not a ld. We may
8969 as well clear ref_from_discarded too. */
8970 skip[val >> 3] = 0;
8971 }
8972 }
8973
8974 if (sec != toc)
8975 used[val >> 3] = 1;
8976 /* For the toc section, we only mark as used if this
8977 entry itself isn't unused. */
8978 else if ((used[rel->r_offset >> 3]
8979 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8980 && !used[val >> 3])
8981 {
8982 /* Do all the relocs again, to catch reference
8983 chains. */
8984 repeat = 1;
8985 used[val >> 3] = 1;
8986 }
8987 }
8988 }
8989 while (repeat);
8990
8991 if (elf_section_data (sec)->relocs != relstart)
8992 free (relstart);
8993 }
8994
8995 /* Merge the used and skip arrays. Assume that TOC
8996 doublewords not appearing as either used or unused belong
8997 to to an entry more than one doubleword in size. */
8998 for (drop = skip, keep = used, last = 0, some_unused = 0;
8999 drop < skip + (toc->size + 7) / 8;
9000 ++drop, ++keep)
9001 {
9002 if (*keep)
9003 {
9004 *drop &= ~ref_from_discarded;
9005 if ((*drop & can_optimize) != 0)
9006 some_unused = 1;
9007 last = 0;
9008 }
9009 else if ((*drop & ref_from_discarded) != 0)
9010 {
9011 some_unused = 1;
9012 last = ref_from_discarded;
9013 }
9014 else
9015 *drop = last;
9016 }
9017
9018 free (used);
9019
9020 if (some_unused)
9021 {
9022 bfd_byte *contents, *src;
9023 unsigned long off;
9024 Elf_Internal_Sym *sym;
9025 bfd_boolean local_toc_syms = FALSE;
9026
9027 /* Shuffle the toc contents, and at the same time convert the
9028 skip array from booleans into offsets. */
9029 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9030 goto error_ret;
9031
9032 elf_section_data (toc)->this_hdr.contents = contents;
9033
9034 for (src = contents, off = 0, drop = skip;
9035 src < contents + toc->size;
9036 src += 8, ++drop)
9037 {
9038 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9039 off += 8;
9040 else if (off != 0)
9041 {
9042 *drop = off;
9043 memcpy (src - off, src, 8);
9044 }
9045 }
9046 *drop = off;
9047 toc->rawsize = toc->size;
9048 toc->size = src - contents - off;
9049
9050 /* Adjust addends for relocs against the toc section sym,
9051 and optimize any accesses we can. */
9052 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9053 {
9054 if (sec->reloc_count == 0
9055 || discarded_section (sec))
9056 continue;
9057
9058 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9059 info->keep_memory);
9060 if (relstart == NULL)
9061 goto error_ret;
9062
9063 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9064 {
9065 enum elf_ppc64_reloc_type r_type;
9066 unsigned long r_symndx;
9067 asection *sym_sec;
9068 struct elf_link_hash_entry *h;
9069 bfd_vma val;
9070
9071 r_type = ELF64_R_TYPE (rel->r_info);
9072 switch (r_type)
9073 {
9074 default:
9075 continue;
9076
9077 case R_PPC64_TOC16:
9078 case R_PPC64_TOC16_LO:
9079 case R_PPC64_TOC16_HI:
9080 case R_PPC64_TOC16_HA:
9081 case R_PPC64_TOC16_DS:
9082 case R_PPC64_TOC16_LO_DS:
9083 case R_PPC64_ADDR64:
9084 break;
9085 }
9086
9087 r_symndx = ELF64_R_SYM (rel->r_info);
9088 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9089 r_symndx, ibfd))
9090 goto error_ret;
9091
9092 if (sym_sec != toc)
9093 continue;
9094
9095 if (h != NULL)
9096 val = h->root.u.def.value;
9097 else
9098 {
9099 val = sym->st_value;
9100 if (val != 0)
9101 local_toc_syms = TRUE;
9102 }
9103
9104 val += rel->r_addend;
9105
9106 if (val > toc->rawsize)
9107 val = toc->rawsize;
9108 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9109 continue;
9110 else if ((skip[val >> 3] & can_optimize) != 0)
9111 {
9112 Elf_Internal_Rela *tocrel
9113 = toc_relocs + (skip[val >> 3] >> 2);
9114 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9115
9116 switch (r_type)
9117 {
9118 case R_PPC64_TOC16_HA:
9119 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9120 break;
9121
9122 case R_PPC64_TOC16_LO_DS:
9123 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9124 break;
9125
9126 default:
9127 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9128 ppc_howto_init ();
9129 info->callbacks->einfo
9130 (_("%P: %H: %s references "
9131 "optimized away TOC entry\n"),
9132 ibfd, sec, rel->r_offset,
9133 ppc64_elf_howto_table[r_type]->name);
9134 bfd_set_error (bfd_error_bad_value);
9135 goto error_ret;
9136 }
9137 rel->r_addend = tocrel->r_addend;
9138 elf_section_data (sec)->relocs = relstart;
9139 continue;
9140 }
9141
9142 if (h != NULL || sym->st_value != 0)
9143 continue;
9144
9145 rel->r_addend -= skip[val >> 3];
9146 elf_section_data (sec)->relocs = relstart;
9147 }
9148
9149 if (elf_section_data (sec)->relocs != relstart)
9150 free (relstart);
9151 }
9152
9153 /* We shouldn't have local or global symbols defined in the TOC,
9154 but handle them anyway. */
9155 if (local_syms != NULL)
9156 for (sym = local_syms;
9157 sym < local_syms + symtab_hdr->sh_info;
9158 ++sym)
9159 if (sym->st_value != 0
9160 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9161 {
9162 unsigned long i;
9163
9164 if (sym->st_value > toc->rawsize)
9165 i = toc->rawsize >> 3;
9166 else
9167 i = sym->st_value >> 3;
9168
9169 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9170 {
9171 if (local_toc_syms)
9172 (*_bfd_error_handler)
9173 (_("%s defined on removed toc entry"),
9174 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9175 do
9176 ++i;
9177 while ((skip[i] & (ref_from_discarded | can_optimize)));
9178 sym->st_value = (bfd_vma) i << 3;
9179 }
9180
9181 sym->st_value -= skip[i];
9182 symtab_hdr->contents = (unsigned char *) local_syms;
9183 }
9184
9185 /* Adjust any global syms defined in this toc input section. */
9186 if (toc_inf.global_toc_syms)
9187 {
9188 toc_inf.toc = toc;
9189 toc_inf.skip = skip;
9190 toc_inf.global_toc_syms = FALSE;
9191 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9192 &toc_inf);
9193 }
9194
9195 if (toc->reloc_count != 0)
9196 {
9197 Elf_Internal_Shdr *rel_hdr;
9198 Elf_Internal_Rela *wrel;
9199 bfd_size_type sz;
9200
9201 /* Remove unused toc relocs, and adjust those we keep. */
9202 if (toc_relocs == NULL)
9203 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9204 info->keep_memory);
9205 if (toc_relocs == NULL)
9206 goto error_ret;
9207
9208 wrel = toc_relocs;
9209 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9210 if ((skip[rel->r_offset >> 3]
9211 & (ref_from_discarded | can_optimize)) == 0)
9212 {
9213 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9214 wrel->r_info = rel->r_info;
9215 wrel->r_addend = rel->r_addend;
9216 ++wrel;
9217 }
9218 else if (!dec_dynrel_count (rel->r_info, toc, info,
9219 &local_syms, NULL, NULL))
9220 goto error_ret;
9221
9222 elf_section_data (toc)->relocs = toc_relocs;
9223 toc->reloc_count = wrel - toc_relocs;
9224 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9225 sz = rel_hdr->sh_entsize;
9226 rel_hdr->sh_size = toc->reloc_count * sz;
9227 }
9228 }
9229 else if (toc_relocs != NULL
9230 && elf_section_data (toc)->relocs != toc_relocs)
9231 free (toc_relocs);
9232
9233 if (local_syms != NULL
9234 && symtab_hdr->contents != (unsigned char *) local_syms)
9235 {
9236 if (!info->keep_memory)
9237 free (local_syms);
9238 else
9239 symtab_hdr->contents = (unsigned char *) local_syms;
9240 }
9241 free (skip);
9242 }
9243
9244 return TRUE;
9245 }
9246
9247 /* Return true iff input section I references the TOC using
9248 instructions limited to +/-32k offsets. */
9249
9250 bfd_boolean
9251 ppc64_elf_has_small_toc_reloc (asection *i)
9252 {
9253 return (is_ppc64_elf (i->owner)
9254 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9255 }
9256
9257 /* Allocate space for one GOT entry. */
9258
9259 static void
9260 allocate_got (struct elf_link_hash_entry *h,
9261 struct bfd_link_info *info,
9262 struct got_entry *gent)
9263 {
9264 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9265 bfd_boolean dyn;
9266 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9267 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9268 ? 16 : 8);
9269 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9270 ? 2 : 1) * sizeof (Elf64_External_Rela);
9271 asection *got = ppc64_elf_tdata (gent->owner)->got;
9272
9273 gent->got.offset = got->size;
9274 got->size += entsize;
9275
9276 dyn = htab->elf.dynamic_sections_created;
9277 if (h->type == STT_GNU_IFUNC)
9278 {
9279 htab->elf.irelplt->size += rentsize;
9280 htab->got_reli_size += rentsize;
9281 }
9282 else if ((info->shared
9283 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9284 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9285 || h->root.type != bfd_link_hash_undefweak))
9286 {
9287 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9288 relgot->size += rentsize;
9289 }
9290 }
9291
9292 /* This function merges got entries in the same toc group. */
9293
9294 static void
9295 merge_got_entries (struct got_entry **pent)
9296 {
9297 struct got_entry *ent, *ent2;
9298
9299 for (ent = *pent; ent != NULL; ent = ent->next)
9300 if (!ent->is_indirect)
9301 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9302 if (!ent2->is_indirect
9303 && ent2->addend == ent->addend
9304 && ent2->tls_type == ent->tls_type
9305 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9306 {
9307 ent2->is_indirect = TRUE;
9308 ent2->got.ent = ent;
9309 }
9310 }
9311
9312 /* Allocate space in .plt, .got and associated reloc sections for
9313 dynamic relocs. */
9314
9315 static bfd_boolean
9316 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9317 {
9318 struct bfd_link_info *info;
9319 struct ppc_link_hash_table *htab;
9320 asection *s;
9321 struct ppc_link_hash_entry *eh;
9322 struct elf_dyn_relocs *p;
9323 struct got_entry **pgent, *gent;
9324
9325 if (h->root.type == bfd_link_hash_indirect)
9326 return TRUE;
9327
9328 info = (struct bfd_link_info *) inf;
9329 htab = ppc_hash_table (info);
9330 if (htab == NULL)
9331 return FALSE;
9332
9333 if ((htab->elf.dynamic_sections_created
9334 && h->dynindx != -1
9335 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9336 || h->type == STT_GNU_IFUNC)
9337 {
9338 struct plt_entry *pent;
9339 bfd_boolean doneone = FALSE;
9340 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9341 if (pent->plt.refcount > 0)
9342 {
9343 if (!htab->elf.dynamic_sections_created
9344 || h->dynindx == -1)
9345 {
9346 s = htab->elf.iplt;
9347 pent->plt.offset = s->size;
9348 s->size += PLT_ENTRY_SIZE (htab);
9349 s = htab->elf.irelplt;
9350 }
9351 else
9352 {
9353 /* If this is the first .plt entry, make room for the special
9354 first entry. */
9355 s = htab->elf.splt;
9356 if (s->size == 0)
9357 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9358
9359 pent->plt.offset = s->size;
9360
9361 /* Make room for this entry. */
9362 s->size += PLT_ENTRY_SIZE (htab);
9363
9364 /* Make room for the .glink code. */
9365 s = htab->glink;
9366 if (s->size == 0)
9367 s->size += GLINK_CALL_STUB_SIZE;
9368 if (htab->opd_abi)
9369 {
9370 /* We need bigger stubs past index 32767. */
9371 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9372 s->size += 4;
9373 s->size += 2*4;
9374 }
9375 else
9376 s->size += 4;
9377
9378 /* We also need to make an entry in the .rela.plt section. */
9379 s = htab->elf.srelplt;
9380 }
9381 s->size += sizeof (Elf64_External_Rela);
9382 doneone = TRUE;
9383 }
9384 else
9385 pent->plt.offset = (bfd_vma) -1;
9386 if (!doneone)
9387 {
9388 h->plt.plist = NULL;
9389 h->needs_plt = 0;
9390 }
9391 }
9392 else
9393 {
9394 h->plt.plist = NULL;
9395 h->needs_plt = 0;
9396 }
9397
9398 eh = (struct ppc_link_hash_entry *) h;
9399 /* Run through the TLS GD got entries first if we're changing them
9400 to TPREL. */
9401 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9402 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9403 if (gent->got.refcount > 0
9404 && (gent->tls_type & TLS_GD) != 0)
9405 {
9406 /* This was a GD entry that has been converted to TPREL. If
9407 there happens to be a TPREL entry we can use that one. */
9408 struct got_entry *ent;
9409 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9410 if (ent->got.refcount > 0
9411 && (ent->tls_type & TLS_TPREL) != 0
9412 && ent->addend == gent->addend
9413 && ent->owner == gent->owner)
9414 {
9415 gent->got.refcount = 0;
9416 break;
9417 }
9418
9419 /* If not, then we'll be using our own TPREL entry. */
9420 if (gent->got.refcount != 0)
9421 gent->tls_type = TLS_TLS | TLS_TPREL;
9422 }
9423
9424 /* Remove any list entry that won't generate a word in the GOT before
9425 we call merge_got_entries. Otherwise we risk merging to empty
9426 entries. */
9427 pgent = &h->got.glist;
9428 while ((gent = *pgent) != NULL)
9429 if (gent->got.refcount > 0)
9430 {
9431 if ((gent->tls_type & TLS_LD) != 0
9432 && !h->def_dynamic)
9433 {
9434 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9435 *pgent = gent->next;
9436 }
9437 else
9438 pgent = &gent->next;
9439 }
9440 else
9441 *pgent = gent->next;
9442
9443 if (!htab->do_multi_toc)
9444 merge_got_entries (&h->got.glist);
9445
9446 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9447 if (!gent->is_indirect)
9448 {
9449 /* Make sure this symbol is output as a dynamic symbol.
9450 Undefined weak syms won't yet be marked as dynamic,
9451 nor will all TLS symbols. */
9452 if (h->dynindx == -1
9453 && !h->forced_local
9454 && h->type != STT_GNU_IFUNC
9455 && htab->elf.dynamic_sections_created)
9456 {
9457 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9458 return FALSE;
9459 }
9460
9461 if (!is_ppc64_elf (gent->owner))
9462 abort ();
9463
9464 allocate_got (h, info, gent);
9465 }
9466
9467 if (eh->dyn_relocs == NULL
9468 || (!htab->elf.dynamic_sections_created
9469 && h->type != STT_GNU_IFUNC))
9470 return TRUE;
9471
9472 /* In the shared -Bsymbolic case, discard space allocated for
9473 dynamic pc-relative relocs against symbols which turn out to be
9474 defined in regular objects. For the normal shared case, discard
9475 space for relocs that have become local due to symbol visibility
9476 changes. */
9477
9478 if (info->shared)
9479 {
9480 /* Relocs that use pc_count are those that appear on a call insn,
9481 or certain REL relocs (see must_be_dyn_reloc) that can be
9482 generated via assembly. We want calls to protected symbols to
9483 resolve directly to the function rather than going via the plt.
9484 If people want function pointer comparisons to work as expected
9485 then they should avoid writing weird assembly. */
9486 if (SYMBOL_CALLS_LOCAL (info, h))
9487 {
9488 struct elf_dyn_relocs **pp;
9489
9490 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9491 {
9492 p->count -= p->pc_count;
9493 p->pc_count = 0;
9494 if (p->count == 0)
9495 *pp = p->next;
9496 else
9497 pp = &p->next;
9498 }
9499 }
9500
9501 /* Also discard relocs on undefined weak syms with non-default
9502 visibility. */
9503 if (eh->dyn_relocs != NULL
9504 && h->root.type == bfd_link_hash_undefweak)
9505 {
9506 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9507 eh->dyn_relocs = NULL;
9508
9509 /* Make sure this symbol is output as a dynamic symbol.
9510 Undefined weak syms won't yet be marked as dynamic. */
9511 else if (h->dynindx == -1
9512 && !h->forced_local)
9513 {
9514 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9515 return FALSE;
9516 }
9517 }
9518 }
9519 else if (h->type == STT_GNU_IFUNC)
9520 {
9521 if (!h->non_got_ref)
9522 eh->dyn_relocs = NULL;
9523 }
9524 else if (ELIMINATE_COPY_RELOCS)
9525 {
9526 /* For the non-shared case, discard space for relocs against
9527 symbols which turn out to need copy relocs or are not
9528 dynamic. */
9529
9530 if (!h->non_got_ref
9531 && !h->def_regular)
9532 {
9533 /* Make sure this symbol is output as a dynamic symbol.
9534 Undefined weak syms won't yet be marked as dynamic. */
9535 if (h->dynindx == -1
9536 && !h->forced_local)
9537 {
9538 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9539 return FALSE;
9540 }
9541
9542 /* If that succeeded, we know we'll be keeping all the
9543 relocs. */
9544 if (h->dynindx != -1)
9545 goto keep;
9546 }
9547
9548 eh->dyn_relocs = NULL;
9549
9550 keep: ;
9551 }
9552
9553 /* Finally, allocate space. */
9554 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9555 {
9556 asection *sreloc = elf_section_data (p->sec)->sreloc;
9557 if (eh->elf.type == STT_GNU_IFUNC)
9558 sreloc = htab->elf.irelplt;
9559 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9560 }
9561
9562 return TRUE;
9563 }
9564
9565 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9566 to set up space for global entry stubs. These are put in glink,
9567 after the branch table. */
9568
9569 static bfd_boolean
9570 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9571 {
9572 struct bfd_link_info *info;
9573 struct ppc_link_hash_table *htab;
9574 struct plt_entry *pent;
9575 asection *s;
9576
9577 if (h->root.type == bfd_link_hash_indirect)
9578 return TRUE;
9579
9580 if (!h->pointer_equality_needed)
9581 return TRUE;
9582
9583 if (h->def_regular)
9584 return TRUE;
9585
9586 info = inf;
9587 htab = ppc_hash_table (info);
9588 if (htab == NULL)
9589 return FALSE;
9590
9591 s = htab->glink;
9592 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9593 if (pent->plt.offset != (bfd_vma) -1
9594 && pent->addend == 0)
9595 {
9596 /* For ELFv2, if this symbol is not defined in a regular file
9597 and we are not generating a shared library or pie, then we
9598 need to define the symbol in the executable on a call stub.
9599 This is to avoid text relocations. */
9600 s->size = (s->size + 15) & -16;
9601 h->root.u.def.section = s;
9602 h->root.u.def.value = s->size;
9603 s->size += 16;
9604 break;
9605 }
9606 return TRUE;
9607 }
9608
9609 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9610 read-only sections. */
9611
9612 static bfd_boolean
9613 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9614 {
9615 if (h->root.type == bfd_link_hash_indirect)
9616 return TRUE;
9617
9618 if (readonly_dynrelocs (h))
9619 {
9620 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9621
9622 /* Not an error, just cut short the traversal. */
9623 return FALSE;
9624 }
9625 return TRUE;
9626 }
9627
9628 /* Set the sizes of the dynamic sections. */
9629
9630 static bfd_boolean
9631 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9632 struct bfd_link_info *info)
9633 {
9634 struct ppc_link_hash_table *htab;
9635 bfd *dynobj;
9636 asection *s;
9637 bfd_boolean relocs;
9638 bfd *ibfd;
9639 struct got_entry *first_tlsld;
9640
9641 htab = ppc_hash_table (info);
9642 if (htab == NULL)
9643 return FALSE;
9644
9645 dynobj = htab->elf.dynobj;
9646 if (dynobj == NULL)
9647 abort ();
9648
9649 if (htab->elf.dynamic_sections_created)
9650 {
9651 /* Set the contents of the .interp section to the interpreter. */
9652 if (info->executable)
9653 {
9654 s = bfd_get_linker_section (dynobj, ".interp");
9655 if (s == NULL)
9656 abort ();
9657 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9658 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9659 }
9660 }
9661
9662 /* Set up .got offsets for local syms, and space for local dynamic
9663 relocs. */
9664 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9665 {
9666 struct got_entry **lgot_ents;
9667 struct got_entry **end_lgot_ents;
9668 struct plt_entry **local_plt;
9669 struct plt_entry **end_local_plt;
9670 unsigned char *lgot_masks;
9671 bfd_size_type locsymcount;
9672 Elf_Internal_Shdr *symtab_hdr;
9673
9674 if (!is_ppc64_elf (ibfd))
9675 continue;
9676
9677 for (s = ibfd->sections; s != NULL; s = s->next)
9678 {
9679 struct ppc_dyn_relocs *p;
9680
9681 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9682 {
9683 if (!bfd_is_abs_section (p->sec)
9684 && bfd_is_abs_section (p->sec->output_section))
9685 {
9686 /* Input section has been discarded, either because
9687 it is a copy of a linkonce section or due to
9688 linker script /DISCARD/, so we'll be discarding
9689 the relocs too. */
9690 }
9691 else if (p->count != 0)
9692 {
9693 asection *srel = elf_section_data (p->sec)->sreloc;
9694 if (p->ifunc)
9695 srel = htab->elf.irelplt;
9696 srel->size += p->count * sizeof (Elf64_External_Rela);
9697 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9698 info->flags |= DF_TEXTREL;
9699 }
9700 }
9701 }
9702
9703 lgot_ents = elf_local_got_ents (ibfd);
9704 if (!lgot_ents)
9705 continue;
9706
9707 symtab_hdr = &elf_symtab_hdr (ibfd);
9708 locsymcount = symtab_hdr->sh_info;
9709 end_lgot_ents = lgot_ents + locsymcount;
9710 local_plt = (struct plt_entry **) end_lgot_ents;
9711 end_local_plt = local_plt + locsymcount;
9712 lgot_masks = (unsigned char *) end_local_plt;
9713 s = ppc64_elf_tdata (ibfd)->got;
9714 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9715 {
9716 struct got_entry **pent, *ent;
9717
9718 pent = lgot_ents;
9719 while ((ent = *pent) != NULL)
9720 if (ent->got.refcount > 0)
9721 {
9722 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9723 {
9724 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9725 *pent = ent->next;
9726 }
9727 else
9728 {
9729 unsigned int ent_size = 8;
9730 unsigned int rel_size = sizeof (Elf64_External_Rela);
9731
9732 ent->got.offset = s->size;
9733 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9734 {
9735 ent_size *= 2;
9736 rel_size *= 2;
9737 }
9738 s->size += ent_size;
9739 if ((*lgot_masks & PLT_IFUNC) != 0)
9740 {
9741 htab->elf.irelplt->size += rel_size;
9742 htab->got_reli_size += rel_size;
9743 }
9744 else if (info->shared)
9745 {
9746 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9747 srel->size += rel_size;
9748 }
9749 pent = &ent->next;
9750 }
9751 }
9752 else
9753 *pent = ent->next;
9754 }
9755
9756 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9757 for (; local_plt < end_local_plt; ++local_plt)
9758 {
9759 struct plt_entry *ent;
9760
9761 for (ent = *local_plt; ent != NULL; ent = ent->next)
9762 if (ent->plt.refcount > 0)
9763 {
9764 s = htab->elf.iplt;
9765 ent->plt.offset = s->size;
9766 s->size += PLT_ENTRY_SIZE (htab);
9767
9768 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9769 }
9770 else
9771 ent->plt.offset = (bfd_vma) -1;
9772 }
9773 }
9774
9775 /* Allocate global sym .plt and .got entries, and space for global
9776 sym dynamic relocs. */
9777 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9778 /* Stash the end of glink branch table. */
9779 if (htab->glink != NULL)
9780 htab->glink->rawsize = htab->glink->size;
9781
9782 if (!htab->opd_abi && !info->shared)
9783 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9784
9785 first_tlsld = NULL;
9786 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9787 {
9788 struct got_entry *ent;
9789
9790 if (!is_ppc64_elf (ibfd))
9791 continue;
9792
9793 ent = ppc64_tlsld_got (ibfd);
9794 if (ent->got.refcount > 0)
9795 {
9796 if (!htab->do_multi_toc && first_tlsld != NULL)
9797 {
9798 ent->is_indirect = TRUE;
9799 ent->got.ent = first_tlsld;
9800 }
9801 else
9802 {
9803 if (first_tlsld == NULL)
9804 first_tlsld = ent;
9805 s = ppc64_elf_tdata (ibfd)->got;
9806 ent->got.offset = s->size;
9807 ent->owner = ibfd;
9808 s->size += 16;
9809 if (info->shared)
9810 {
9811 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9812 srel->size += sizeof (Elf64_External_Rela);
9813 }
9814 }
9815 }
9816 else
9817 ent->got.offset = (bfd_vma) -1;
9818 }
9819
9820 /* We now have determined the sizes of the various dynamic sections.
9821 Allocate memory for them. */
9822 relocs = FALSE;
9823 for (s = dynobj->sections; s != NULL; s = s->next)
9824 {
9825 if ((s->flags & SEC_LINKER_CREATED) == 0)
9826 continue;
9827
9828 if (s == htab->brlt || s == htab->relbrlt)
9829 /* These haven't been allocated yet; don't strip. */
9830 continue;
9831 else if (s == htab->elf.sgot
9832 || s == htab->elf.splt
9833 || s == htab->elf.iplt
9834 || s == htab->glink
9835 || s == htab->dynbss)
9836 {
9837 /* Strip this section if we don't need it; see the
9838 comment below. */
9839 }
9840 else if (s == htab->glink_eh_frame)
9841 {
9842 if (!bfd_is_abs_section (s->output_section))
9843 /* Not sized yet. */
9844 continue;
9845 }
9846 else if (CONST_STRNEQ (s->name, ".rela"))
9847 {
9848 if (s->size != 0)
9849 {
9850 if (s != htab->elf.srelplt)
9851 relocs = TRUE;
9852
9853 /* We use the reloc_count field as a counter if we need
9854 to copy relocs into the output file. */
9855 s->reloc_count = 0;
9856 }
9857 }
9858 else
9859 {
9860 /* It's not one of our sections, so don't allocate space. */
9861 continue;
9862 }
9863
9864 if (s->size == 0)
9865 {
9866 /* If we don't need this section, strip it from the
9867 output file. This is mostly to handle .rela.bss and
9868 .rela.plt. We must create both sections in
9869 create_dynamic_sections, because they must be created
9870 before the linker maps input sections to output
9871 sections. The linker does that before
9872 adjust_dynamic_symbol is called, and it is that
9873 function which decides whether anything needs to go
9874 into these sections. */
9875 s->flags |= SEC_EXCLUDE;
9876 continue;
9877 }
9878
9879 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9880 continue;
9881
9882 /* Allocate memory for the section contents. We use bfd_zalloc
9883 here in case unused entries are not reclaimed before the
9884 section's contents are written out. This should not happen,
9885 but this way if it does we get a R_PPC64_NONE reloc in .rela
9886 sections instead of garbage.
9887 We also rely on the section contents being zero when writing
9888 the GOT. */
9889 s->contents = bfd_zalloc (dynobj, s->size);
9890 if (s->contents == NULL)
9891 return FALSE;
9892 }
9893
9894 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9895 {
9896 if (!is_ppc64_elf (ibfd))
9897 continue;
9898
9899 s = ppc64_elf_tdata (ibfd)->got;
9900 if (s != NULL && s != htab->elf.sgot)
9901 {
9902 if (s->size == 0)
9903 s->flags |= SEC_EXCLUDE;
9904 else
9905 {
9906 s->contents = bfd_zalloc (ibfd, s->size);
9907 if (s->contents == NULL)
9908 return FALSE;
9909 }
9910 }
9911 s = ppc64_elf_tdata (ibfd)->relgot;
9912 if (s != NULL)
9913 {
9914 if (s->size == 0)
9915 s->flags |= SEC_EXCLUDE;
9916 else
9917 {
9918 s->contents = bfd_zalloc (ibfd, s->size);
9919 if (s->contents == NULL)
9920 return FALSE;
9921 relocs = TRUE;
9922 s->reloc_count = 0;
9923 }
9924 }
9925 }
9926
9927 if (htab->elf.dynamic_sections_created)
9928 {
9929 bfd_boolean tls_opt;
9930
9931 /* Add some entries to the .dynamic section. We fill in the
9932 values later, in ppc64_elf_finish_dynamic_sections, but we
9933 must add the entries now so that we get the correct size for
9934 the .dynamic section. The DT_DEBUG entry is filled in by the
9935 dynamic linker and used by the debugger. */
9936 #define add_dynamic_entry(TAG, VAL) \
9937 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9938
9939 if (info->executable)
9940 {
9941 if (!add_dynamic_entry (DT_DEBUG, 0))
9942 return FALSE;
9943 }
9944
9945 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9946 {
9947 if (!add_dynamic_entry (DT_PLTGOT, 0)
9948 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9949 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9950 || !add_dynamic_entry (DT_JMPREL, 0)
9951 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9952 return FALSE;
9953 }
9954
9955 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9956 {
9957 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9958 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9959 return FALSE;
9960 }
9961
9962 tls_opt = (!htab->params->no_tls_get_addr_opt
9963 && htab->tls_get_addr_fd != NULL
9964 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
9965 if (tls_opt || !htab->opd_abi)
9966 {
9967 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
9968 return FALSE;
9969 }
9970
9971 if (relocs)
9972 {
9973 if (!add_dynamic_entry (DT_RELA, 0)
9974 || !add_dynamic_entry (DT_RELASZ, 0)
9975 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9976 return FALSE;
9977
9978 /* If any dynamic relocs apply to a read-only section,
9979 then we need a DT_TEXTREL entry. */
9980 if ((info->flags & DF_TEXTREL) == 0)
9981 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
9982
9983 if ((info->flags & DF_TEXTREL) != 0)
9984 {
9985 if (!add_dynamic_entry (DT_TEXTREL, 0))
9986 return FALSE;
9987 }
9988 }
9989 }
9990 #undef add_dynamic_entry
9991
9992 return TRUE;
9993 }
9994
9995 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
9996
9997 static bfd_boolean
9998 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
9999 {
10000 if (h->plt.plist != NULL
10001 && !h->def_regular
10002 && !h->pointer_equality_needed)
10003 return FALSE;
10004
10005 return _bfd_elf_hash_symbol (h);
10006 }
10007
10008 /* Determine the type of stub needed, if any, for a call. */
10009
10010 static inline enum ppc_stub_type
10011 ppc_type_of_stub (asection *input_sec,
10012 const Elf_Internal_Rela *rel,
10013 struct ppc_link_hash_entry **hash,
10014 struct plt_entry **plt_ent,
10015 bfd_vma destination,
10016 unsigned long local_off)
10017 {
10018 struct ppc_link_hash_entry *h = *hash;
10019 bfd_vma location;
10020 bfd_vma branch_offset;
10021 bfd_vma max_branch_offset;
10022 enum elf_ppc64_reloc_type r_type;
10023
10024 if (h != NULL)
10025 {
10026 struct plt_entry *ent;
10027 struct ppc_link_hash_entry *fdh = h;
10028 if (h->oh != NULL
10029 && h->oh->is_func_descriptor)
10030 {
10031 fdh = ppc_follow_link (h->oh);
10032 *hash = fdh;
10033 }
10034
10035 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10036 if (ent->addend == rel->r_addend
10037 && ent->plt.offset != (bfd_vma) -1)
10038 {
10039 *plt_ent = ent;
10040 return ppc_stub_plt_call;
10041 }
10042
10043 /* Here, we know we don't have a plt entry. If we don't have a
10044 either a defined function descriptor or a defined entry symbol
10045 in a regular object file, then it is pointless trying to make
10046 any other type of stub. */
10047 if (!is_static_defined (&fdh->elf)
10048 && !is_static_defined (&h->elf))
10049 return ppc_stub_none;
10050 }
10051 else if (elf_local_got_ents (input_sec->owner) != NULL)
10052 {
10053 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10054 struct plt_entry **local_plt = (struct plt_entry **)
10055 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10056 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10057
10058 if (local_plt[r_symndx] != NULL)
10059 {
10060 struct plt_entry *ent;
10061
10062 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10063 if (ent->addend == rel->r_addend
10064 && ent->plt.offset != (bfd_vma) -1)
10065 {
10066 *plt_ent = ent;
10067 return ppc_stub_plt_call;
10068 }
10069 }
10070 }
10071
10072 /* Determine where the call point is. */
10073 location = (input_sec->output_offset
10074 + input_sec->output_section->vma
10075 + rel->r_offset);
10076
10077 branch_offset = destination - location;
10078 r_type = ELF64_R_TYPE (rel->r_info);
10079
10080 /* Determine if a long branch stub is needed. */
10081 max_branch_offset = 1 << 25;
10082 if (r_type != R_PPC64_REL24)
10083 max_branch_offset = 1 << 15;
10084
10085 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10086 /* We need a stub. Figure out whether a long_branch or plt_branch
10087 is needed later. */
10088 return ppc_stub_long_branch;
10089
10090 return ppc_stub_none;
10091 }
10092
10093 /* With power7 weakly ordered memory model, it is possible for ld.so
10094 to update a plt entry in one thread and have another thread see a
10095 stale zero toc entry. To avoid this we need some sort of acquire
10096 barrier in the call stub. One solution is to make the load of the
10097 toc word seem to appear to depend on the load of the function entry
10098 word. Another solution is to test for r2 being zero, and branch to
10099 the appropriate glink entry if so.
10100
10101 . fake dep barrier compare
10102 . ld 12,xxx(2) ld 12,xxx(2)
10103 . mtctr 12 mtctr 12
10104 . xor 11,12,12 ld 2,xxx+8(2)
10105 . add 2,2,11 cmpldi 2,0
10106 . ld 2,xxx+8(2) bnectr+
10107 . bctr b <glink_entry>
10108
10109 The solution involving the compare turns out to be faster, so
10110 that's what we use unless the branch won't reach. */
10111
10112 #define ALWAYS_USE_FAKE_DEP 0
10113 #define ALWAYS_EMIT_R2SAVE 0
10114
10115 #define PPC_LO(v) ((v) & 0xffff)
10116 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10117 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10118
10119 static inline unsigned int
10120 plt_stub_size (struct ppc_link_hash_table *htab,
10121 struct ppc_stub_hash_entry *stub_entry,
10122 bfd_vma off)
10123 {
10124 unsigned size = 12;
10125
10126 if (ALWAYS_EMIT_R2SAVE
10127 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10128 size += 4;
10129 if (PPC_HA (off) != 0)
10130 size += 4;
10131 if (htab->opd_abi)
10132 {
10133 size += 4;
10134 if (htab->params->plt_static_chain)
10135 size += 4;
10136 if (htab->params->plt_thread_safe)
10137 size += 8;
10138 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10139 size += 4;
10140 }
10141 if (stub_entry->h != NULL
10142 && (stub_entry->h == htab->tls_get_addr_fd
10143 || stub_entry->h == htab->tls_get_addr)
10144 && !htab->params->no_tls_get_addr_opt)
10145 size += 13 * 4;
10146 return size;
10147 }
10148
10149 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10150 then return the padding needed to do so. */
10151 static inline unsigned int
10152 plt_stub_pad (struct ppc_link_hash_table *htab,
10153 struct ppc_stub_hash_entry *stub_entry,
10154 bfd_vma plt_off)
10155 {
10156 int stub_align = 1 << htab->params->plt_stub_align;
10157 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10158 bfd_vma stub_off = stub_entry->stub_sec->size;
10159
10160 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10161 > (stub_size & -stub_align))
10162 return stub_align - (stub_off & (stub_align - 1));
10163 return 0;
10164 }
10165
10166 /* Build a .plt call stub. */
10167
10168 static inline bfd_byte *
10169 build_plt_stub (struct ppc_link_hash_table *htab,
10170 struct ppc_stub_hash_entry *stub_entry,
10171 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10172 {
10173 bfd *obfd = htab->params->stub_bfd;
10174 bfd_boolean plt_load_toc = htab->opd_abi;
10175 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10176 bfd_boolean plt_thread_safe = htab->params->plt_thread_safe;
10177 bfd_boolean use_fake_dep = plt_thread_safe;
10178 bfd_vma cmp_branch_off = 0;
10179
10180 if (!ALWAYS_USE_FAKE_DEP
10181 && plt_load_toc
10182 && plt_thread_safe
10183 && !(stub_entry->h != NULL
10184 && (stub_entry->h == htab->tls_get_addr_fd
10185 || stub_entry->h == htab->tls_get_addr)
10186 && !htab->params->no_tls_get_addr_opt))
10187 {
10188 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10189 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10190 / PLT_ENTRY_SIZE (htab));
10191 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10192 bfd_vma to, from;
10193
10194 if (pltindex > 32768)
10195 glinkoff += (pltindex - 32768) * 4;
10196 to = (glinkoff
10197 + htab->glink->output_offset
10198 + htab->glink->output_section->vma);
10199 from = (p - stub_entry->stub_sec->contents
10200 + 4 * (ALWAYS_EMIT_R2SAVE
10201 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10202 + 4 * (PPC_HA (offset) != 0)
10203 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10204 != PPC_HA (offset))
10205 + 4 * (plt_static_chain != 0)
10206 + 20
10207 + stub_entry->stub_sec->output_offset
10208 + stub_entry->stub_sec->output_section->vma);
10209 cmp_branch_off = to - from;
10210 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10211 }
10212
10213 if (PPC_HA (offset) != 0)
10214 {
10215 if (r != NULL)
10216 {
10217 if (ALWAYS_EMIT_R2SAVE
10218 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10219 r[0].r_offset += 4;
10220 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10221 r[1].r_offset = r[0].r_offset + 4;
10222 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10223 r[1].r_addend = r[0].r_addend;
10224 if (plt_load_toc)
10225 {
10226 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10227 {
10228 r[2].r_offset = r[1].r_offset + 4;
10229 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10230 r[2].r_addend = r[0].r_addend;
10231 }
10232 else
10233 {
10234 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10235 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10236 r[2].r_addend = r[0].r_addend + 8;
10237 if (plt_static_chain)
10238 {
10239 r[3].r_offset = r[2].r_offset + 4;
10240 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10241 r[3].r_addend = r[0].r_addend + 16;
10242 }
10243 }
10244 }
10245 }
10246 if (ALWAYS_EMIT_R2SAVE
10247 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10248 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10249 if (plt_load_toc)
10250 {
10251 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10252 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10253 }
10254 else
10255 {
10256 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10257 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10258 }
10259 if (plt_load_toc
10260 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10261 {
10262 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10263 offset = 0;
10264 }
10265 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10266 if (plt_load_toc)
10267 {
10268 if (use_fake_dep)
10269 {
10270 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10271 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10272 }
10273 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10274 if (plt_static_chain)
10275 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10276 }
10277 }
10278 else
10279 {
10280 if (r != NULL)
10281 {
10282 if (ALWAYS_EMIT_R2SAVE
10283 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10284 r[0].r_offset += 4;
10285 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10286 if (plt_load_toc)
10287 {
10288 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10289 {
10290 r[1].r_offset = r[0].r_offset + 4;
10291 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10292 r[1].r_addend = r[0].r_addend;
10293 }
10294 else
10295 {
10296 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10297 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10298 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10299 if (plt_static_chain)
10300 {
10301 r[2].r_offset = r[1].r_offset + 4;
10302 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10303 r[2].r_addend = r[0].r_addend + 8;
10304 }
10305 }
10306 }
10307 }
10308 if (ALWAYS_EMIT_R2SAVE
10309 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10310 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10311 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10312 if (plt_load_toc
10313 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10314 {
10315 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10316 offset = 0;
10317 }
10318 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10319 if (plt_load_toc)
10320 {
10321 if (use_fake_dep)
10322 {
10323 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10324 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10325 }
10326 if (plt_static_chain)
10327 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10328 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10329 }
10330 }
10331 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10332 {
10333 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10334 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10335 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10336 }
10337 else
10338 bfd_put_32 (obfd, BCTR, p), p += 4;
10339 return p;
10340 }
10341
10342 /* Build a special .plt call stub for __tls_get_addr. */
10343
10344 #define LD_R11_0R3 0xe9630000
10345 #define LD_R12_0R3 0xe9830000
10346 #define MR_R0_R3 0x7c601b78
10347 #define CMPDI_R11_0 0x2c2b0000
10348 #define ADD_R3_R12_R13 0x7c6c6a14
10349 #define BEQLR 0x4d820020
10350 #define MR_R3_R0 0x7c030378
10351 #define STD_R11_0R1 0xf9610000
10352 #define BCTRL 0x4e800421
10353 #define LD_R11_0R1 0xe9610000
10354 #define MTLR_R11 0x7d6803a6
10355
10356 static inline bfd_byte *
10357 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10358 struct ppc_stub_hash_entry *stub_entry,
10359 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10360 {
10361 bfd *obfd = htab->params->stub_bfd;
10362
10363 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10364 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10365 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10366 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10367 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10368 bfd_put_32 (obfd, BEQLR, p), p += 4;
10369 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10370 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10371 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10372
10373 if (r != NULL)
10374 r[0].r_offset += 9 * 4;
10375 p = build_plt_stub (htab, stub_entry, p, offset, r);
10376 bfd_put_32 (obfd, BCTRL, p - 4);
10377
10378 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10379 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10380 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10381 bfd_put_32 (obfd, BLR, p), p += 4;
10382
10383 return p;
10384 }
10385
10386 static Elf_Internal_Rela *
10387 get_relocs (asection *sec, int count)
10388 {
10389 Elf_Internal_Rela *relocs;
10390 struct bfd_elf_section_data *elfsec_data;
10391
10392 elfsec_data = elf_section_data (sec);
10393 relocs = elfsec_data->relocs;
10394 if (relocs == NULL)
10395 {
10396 bfd_size_type relsize;
10397 relsize = sec->reloc_count * sizeof (*relocs);
10398 relocs = bfd_alloc (sec->owner, relsize);
10399 if (relocs == NULL)
10400 return NULL;
10401 elfsec_data->relocs = relocs;
10402 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10403 sizeof (Elf_Internal_Shdr));
10404 if (elfsec_data->rela.hdr == NULL)
10405 return NULL;
10406 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10407 * sizeof (Elf64_External_Rela));
10408 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10409 sec->reloc_count = 0;
10410 }
10411 relocs += sec->reloc_count;
10412 sec->reloc_count += count;
10413 return relocs;
10414 }
10415
10416 static bfd_vma
10417 get_r2off (struct bfd_link_info *info,
10418 struct ppc_stub_hash_entry *stub_entry)
10419 {
10420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10421 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10422
10423 if (r2off == 0)
10424 {
10425 /* Support linking -R objects. Get the toc pointer from the
10426 opd entry. */
10427 char buf[8];
10428 if (!htab->opd_abi)
10429 return r2off;
10430 asection *opd = stub_entry->h->elf.root.u.def.section;
10431 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10432
10433 if (strcmp (opd->name, ".opd") != 0
10434 || opd->reloc_count != 0)
10435 {
10436 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10437 stub_entry->h->elf.root.root.string);
10438 bfd_set_error (bfd_error_bad_value);
10439 return 0;
10440 }
10441 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10442 return 0;
10443 r2off = bfd_get_64 (opd->owner, buf);
10444 r2off -= elf_gp (info->output_bfd);
10445 }
10446 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10447 return r2off;
10448 }
10449
10450 static bfd_boolean
10451 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10452 {
10453 struct ppc_stub_hash_entry *stub_entry;
10454 struct ppc_branch_hash_entry *br_entry;
10455 struct bfd_link_info *info;
10456 struct ppc_link_hash_table *htab;
10457 bfd_byte *loc;
10458 bfd_byte *p;
10459 bfd_vma dest, off;
10460 int size;
10461 Elf_Internal_Rela *r;
10462 asection *plt;
10463
10464 /* Massage our args to the form they really have. */
10465 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10466 info = in_arg;
10467
10468 htab = ppc_hash_table (info);
10469 if (htab == NULL)
10470 return FALSE;
10471
10472 /* Make a note of the offset within the stubs for this entry. */
10473 stub_entry->stub_offset = stub_entry->stub_sec->size;
10474 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10475
10476 htab->stub_count[stub_entry->stub_type - 1] += 1;
10477 switch (stub_entry->stub_type)
10478 {
10479 case ppc_stub_long_branch:
10480 case ppc_stub_long_branch_r2off:
10481 /* Branches are relative. This is where we are going to. */
10482 dest = (stub_entry->target_value
10483 + stub_entry->target_section->output_offset
10484 + stub_entry->target_section->output_section->vma);
10485 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10486 off = dest;
10487
10488 /* And this is where we are coming from. */
10489 off -= (stub_entry->stub_offset
10490 + stub_entry->stub_sec->output_offset
10491 + stub_entry->stub_sec->output_section->vma);
10492
10493 size = 4;
10494 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10495 {
10496 bfd_vma r2off = get_r2off (info, stub_entry);
10497
10498 if (r2off == 0)
10499 {
10500 htab->stub_error = TRUE;
10501 return FALSE;
10502 }
10503 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10504 loc += 4;
10505 size = 12;
10506 if (PPC_HA (r2off) != 0)
10507 {
10508 size = 16;
10509 bfd_put_32 (htab->params->stub_bfd,
10510 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10511 loc += 4;
10512 }
10513 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10514 loc += 4;
10515 off -= size - 4;
10516 }
10517 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10518
10519 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10520 {
10521 info->callbacks->einfo
10522 (_("%P: long branch stub `%s' offset overflow\n"),
10523 stub_entry->root.string);
10524 htab->stub_error = TRUE;
10525 return FALSE;
10526 }
10527
10528 if (info->emitrelocations)
10529 {
10530 r = get_relocs (stub_entry->stub_sec, 1);
10531 if (r == NULL)
10532 return FALSE;
10533 r->r_offset = loc - stub_entry->stub_sec->contents;
10534 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10535 r->r_addend = dest;
10536 if (stub_entry->h != NULL)
10537 {
10538 struct elf_link_hash_entry **hashes;
10539 unsigned long symndx;
10540 struct ppc_link_hash_entry *h;
10541
10542 hashes = elf_sym_hashes (htab->params->stub_bfd);
10543 if (hashes == NULL)
10544 {
10545 bfd_size_type hsize;
10546
10547 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10548 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10549 if (hashes == NULL)
10550 return FALSE;
10551 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10552 htab->stub_globals = 1;
10553 }
10554 symndx = htab->stub_globals++;
10555 h = stub_entry->h;
10556 hashes[symndx] = &h->elf;
10557 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10558 if (h->oh != NULL && h->oh->is_func)
10559 h = ppc_follow_link (h->oh);
10560 if (h->elf.root.u.def.section != stub_entry->target_section)
10561 /* H is an opd symbol. The addend must be zero. */
10562 r->r_addend = 0;
10563 else
10564 {
10565 off = (h->elf.root.u.def.value
10566 + h->elf.root.u.def.section->output_offset
10567 + h->elf.root.u.def.section->output_section->vma);
10568 r->r_addend -= off;
10569 }
10570 }
10571 }
10572 break;
10573
10574 case ppc_stub_plt_branch:
10575 case ppc_stub_plt_branch_r2off:
10576 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10577 stub_entry->root.string + 9,
10578 FALSE, FALSE);
10579 if (br_entry == NULL)
10580 {
10581 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10582 stub_entry->root.string);
10583 htab->stub_error = TRUE;
10584 return FALSE;
10585 }
10586
10587 dest = (stub_entry->target_value
10588 + stub_entry->target_section->output_offset
10589 + stub_entry->target_section->output_section->vma);
10590 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10591 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10592
10593 bfd_put_64 (htab->brlt->owner, dest,
10594 htab->brlt->contents + br_entry->offset);
10595
10596 if (br_entry->iter == htab->stub_iteration)
10597 {
10598 br_entry->iter = 0;
10599
10600 if (htab->relbrlt != NULL)
10601 {
10602 /* Create a reloc for the branch lookup table entry. */
10603 Elf_Internal_Rela rela;
10604 bfd_byte *rl;
10605
10606 rela.r_offset = (br_entry->offset
10607 + htab->brlt->output_offset
10608 + htab->brlt->output_section->vma);
10609 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10610 rela.r_addend = dest;
10611
10612 rl = htab->relbrlt->contents;
10613 rl += (htab->relbrlt->reloc_count++
10614 * sizeof (Elf64_External_Rela));
10615 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10616 }
10617 else if (info->emitrelocations)
10618 {
10619 r = get_relocs (htab->brlt, 1);
10620 if (r == NULL)
10621 return FALSE;
10622 /* brlt, being SEC_LINKER_CREATED does not go through the
10623 normal reloc processing. Symbols and offsets are not
10624 translated from input file to output file form, so
10625 set up the offset per the output file. */
10626 r->r_offset = (br_entry->offset
10627 + htab->brlt->output_offset
10628 + htab->brlt->output_section->vma);
10629 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10630 r->r_addend = dest;
10631 }
10632 }
10633
10634 dest = (br_entry->offset
10635 + htab->brlt->output_offset
10636 + htab->brlt->output_section->vma);
10637
10638 off = (dest
10639 - elf_gp (htab->brlt->output_section->owner)
10640 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10641
10642 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10643 {
10644 info->callbacks->einfo
10645 (_("%P: linkage table error against `%T'\n"),
10646 stub_entry->root.string);
10647 bfd_set_error (bfd_error_bad_value);
10648 htab->stub_error = TRUE;
10649 return FALSE;
10650 }
10651
10652 if (info->emitrelocations)
10653 {
10654 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10655 if (r == NULL)
10656 return FALSE;
10657 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10658 if (bfd_big_endian (info->output_bfd))
10659 r[0].r_offset += 2;
10660 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10661 r[0].r_offset += 4;
10662 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10663 r[0].r_addend = dest;
10664 if (PPC_HA (off) != 0)
10665 {
10666 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10667 r[1].r_offset = r[0].r_offset + 4;
10668 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10669 r[1].r_addend = r[0].r_addend;
10670 }
10671 }
10672
10673 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10674 {
10675 if (PPC_HA (off) != 0)
10676 {
10677 size = 16;
10678 bfd_put_32 (htab->params->stub_bfd,
10679 ADDIS_R12_R2 | PPC_HA (off), loc);
10680 loc += 4;
10681 bfd_put_32 (htab->params->stub_bfd,
10682 LD_R12_0R12 | PPC_LO (off), loc);
10683 }
10684 else
10685 {
10686 size = 12;
10687 bfd_put_32 (htab->params->stub_bfd,
10688 LD_R12_0R2 | PPC_LO (off), loc);
10689 }
10690 }
10691 else
10692 {
10693 bfd_vma r2off = get_r2off (info, stub_entry);
10694
10695 if (r2off == 0 && htab->opd_abi)
10696 {
10697 htab->stub_error = TRUE;
10698 return FALSE;
10699 }
10700
10701 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10702 loc += 4;
10703 size = 16;
10704 if (PPC_HA (off) != 0)
10705 {
10706 size += 4;
10707 bfd_put_32 (htab->params->stub_bfd,
10708 ADDIS_R12_R2 | PPC_HA (off), loc);
10709 loc += 4;
10710 bfd_put_32 (htab->params->stub_bfd,
10711 LD_R12_0R12 | PPC_LO (off), loc);
10712 }
10713 else
10714 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10715
10716 if (PPC_HA (r2off) != 0)
10717 {
10718 size += 4;
10719 loc += 4;
10720 bfd_put_32 (htab->params->stub_bfd,
10721 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10722 }
10723 if (PPC_LO (r2off) != 0)
10724 {
10725 size += 4;
10726 loc += 4;
10727 bfd_put_32 (htab->params->stub_bfd,
10728 ADDI_R2_R2 | PPC_LO (r2off), loc);
10729 }
10730 }
10731 loc += 4;
10732 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10733 loc += 4;
10734 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10735 break;
10736
10737 case ppc_stub_plt_call:
10738 case ppc_stub_plt_call_r2save:
10739 if (stub_entry->h != NULL
10740 && stub_entry->h->is_func_descriptor
10741 && stub_entry->h->oh != NULL)
10742 {
10743 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10744
10745 /* If the old-ABI "dot-symbol" is undefined make it weak so
10746 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10747 FIXME: We used to define the symbol on one of the call
10748 stubs instead, which is why we test symbol section id
10749 against htab->top_id in various places. Likely all
10750 these checks could now disappear. */
10751 if (fh->elf.root.type == bfd_link_hash_undefined)
10752 fh->elf.root.type = bfd_link_hash_undefweak;
10753 /* Stop undo_symbol_twiddle changing it back to undefined. */
10754 fh->was_undefined = 0;
10755 }
10756
10757 /* Now build the stub. */
10758 dest = stub_entry->plt_ent->plt.offset & ~1;
10759 if (dest >= (bfd_vma) -2)
10760 abort ();
10761
10762 plt = htab->elf.splt;
10763 if (!htab->elf.dynamic_sections_created
10764 || stub_entry->h == NULL
10765 || stub_entry->h->elf.dynindx == -1)
10766 plt = htab->elf.iplt;
10767
10768 dest += plt->output_offset + plt->output_section->vma;
10769
10770 if (stub_entry->h == NULL
10771 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10772 {
10773 Elf_Internal_Rela rela;
10774 bfd_byte *rl;
10775
10776 rela.r_offset = dest;
10777 if (htab->opd_abi)
10778 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10779 else
10780 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10781 rela.r_addend = (stub_entry->target_value
10782 + stub_entry->target_section->output_offset
10783 + stub_entry->target_section->output_section->vma);
10784
10785 rl = (htab->elf.irelplt->contents
10786 + (htab->elf.irelplt->reloc_count++
10787 * sizeof (Elf64_External_Rela)));
10788 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10789 stub_entry->plt_ent->plt.offset |= 1;
10790 }
10791
10792 off = (dest
10793 - elf_gp (plt->output_section->owner)
10794 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10795
10796 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10797 {
10798 info->callbacks->einfo
10799 (_("%P: linkage table error against `%T'\n"),
10800 stub_entry->h != NULL
10801 ? stub_entry->h->elf.root.root.string
10802 : "<local sym>");
10803 bfd_set_error (bfd_error_bad_value);
10804 htab->stub_error = TRUE;
10805 return FALSE;
10806 }
10807
10808 if (htab->params->plt_stub_align != 0)
10809 {
10810 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10811
10812 stub_entry->stub_sec->size += pad;
10813 stub_entry->stub_offset = stub_entry->stub_sec->size;
10814 loc += pad;
10815 }
10816
10817 r = NULL;
10818 if (info->emitrelocations)
10819 {
10820 r = get_relocs (stub_entry->stub_sec,
10821 ((PPC_HA (off) != 0)
10822 + (htab->opd_abi
10823 ? 2 + (htab->params->plt_static_chain
10824 && PPC_HA (off + 16) == PPC_HA (off))
10825 : 1)));
10826 if (r == NULL)
10827 return FALSE;
10828 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10829 if (bfd_big_endian (info->output_bfd))
10830 r[0].r_offset += 2;
10831 r[0].r_addend = dest;
10832 }
10833 if (stub_entry->h != NULL
10834 && (stub_entry->h == htab->tls_get_addr_fd
10835 || stub_entry->h == htab->tls_get_addr)
10836 && !htab->params->no_tls_get_addr_opt)
10837 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10838 else
10839 p = build_plt_stub (htab, stub_entry, loc, off, r);
10840 size = p - loc;
10841 break;
10842
10843 default:
10844 BFD_FAIL ();
10845 return FALSE;
10846 }
10847
10848 stub_entry->stub_sec->size += size;
10849
10850 if (htab->params->emit_stub_syms)
10851 {
10852 struct elf_link_hash_entry *h;
10853 size_t len1, len2;
10854 char *name;
10855 const char *const stub_str[] = { "long_branch",
10856 "long_branch_r2off",
10857 "plt_branch",
10858 "plt_branch_r2off",
10859 "plt_call",
10860 "plt_call" };
10861
10862 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10863 len2 = strlen (stub_entry->root.string);
10864 name = bfd_malloc (len1 + len2 + 2);
10865 if (name == NULL)
10866 return FALSE;
10867 memcpy (name, stub_entry->root.string, 9);
10868 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10869 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10870 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10871 if (h == NULL)
10872 return FALSE;
10873 if (h->root.type == bfd_link_hash_new)
10874 {
10875 h->root.type = bfd_link_hash_defined;
10876 h->root.u.def.section = stub_entry->stub_sec;
10877 h->root.u.def.value = stub_entry->stub_offset;
10878 h->ref_regular = 1;
10879 h->def_regular = 1;
10880 h->ref_regular_nonweak = 1;
10881 h->forced_local = 1;
10882 h->non_elf = 0;
10883 }
10884 }
10885
10886 return TRUE;
10887 }
10888
10889 /* As above, but don't actually build the stub. Just bump offset so
10890 we know stub section sizes, and select plt_branch stubs where
10891 long_branch stubs won't do. */
10892
10893 static bfd_boolean
10894 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10895 {
10896 struct ppc_stub_hash_entry *stub_entry;
10897 struct bfd_link_info *info;
10898 struct ppc_link_hash_table *htab;
10899 bfd_vma off;
10900 int size;
10901
10902 /* Massage our args to the form they really have. */
10903 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10904 info = in_arg;
10905
10906 htab = ppc_hash_table (info);
10907 if (htab == NULL)
10908 return FALSE;
10909
10910 if (stub_entry->stub_type == ppc_stub_plt_call
10911 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10912 {
10913 asection *plt;
10914 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10915 if (off >= (bfd_vma) -2)
10916 abort ();
10917 plt = htab->elf.splt;
10918 if (!htab->elf.dynamic_sections_created
10919 || stub_entry->h == NULL
10920 || stub_entry->h->elf.dynindx == -1)
10921 plt = htab->elf.iplt;
10922 off += (plt->output_offset
10923 + plt->output_section->vma
10924 - elf_gp (plt->output_section->owner)
10925 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10926
10927 size = plt_stub_size (htab, stub_entry, off);
10928 if (htab->params->plt_stub_align)
10929 size += plt_stub_pad (htab, stub_entry, off);
10930 if (info->emitrelocations)
10931 {
10932 stub_entry->stub_sec->reloc_count
10933 += ((PPC_HA (off) != 0)
10934 + (htab->opd_abi
10935 ? 2 + (htab->params->plt_static_chain
10936 && PPC_HA (off + 16) == PPC_HA (off))
10937 : 1));
10938 stub_entry->stub_sec->flags |= SEC_RELOC;
10939 }
10940 }
10941 else
10942 {
10943 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10944 variants. */
10945 bfd_vma r2off = 0;
10946 bfd_vma local_off = 0;
10947
10948 off = (stub_entry->target_value
10949 + stub_entry->target_section->output_offset
10950 + stub_entry->target_section->output_section->vma);
10951 off -= (stub_entry->stub_sec->size
10952 + stub_entry->stub_sec->output_offset
10953 + stub_entry->stub_sec->output_section->vma);
10954
10955 /* Reset the stub type from the plt variant in case we now
10956 can reach with a shorter stub. */
10957 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10958 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10959
10960 size = 4;
10961 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10962 {
10963 r2off = get_r2off (info, stub_entry);
10964 if (r2off == 0 && htab->opd_abi)
10965 {
10966 htab->stub_error = TRUE;
10967 return FALSE;
10968 }
10969 size = 12;
10970 if (PPC_HA (r2off) != 0)
10971 size = 16;
10972 off -= size - 4;
10973 }
10974
10975 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10976
10977 /* If the branch offset if too big, use a ppc_stub_plt_branch.
10978 Do the same for -R objects without function descriptors. */
10979 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
10980 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
10981 && r2off == 0))
10982 {
10983 struct ppc_branch_hash_entry *br_entry;
10984
10985 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10986 stub_entry->root.string + 9,
10987 TRUE, FALSE);
10988 if (br_entry == NULL)
10989 {
10990 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10991 stub_entry->root.string);
10992 htab->stub_error = TRUE;
10993 return FALSE;
10994 }
10995
10996 if (br_entry->iter != htab->stub_iteration)
10997 {
10998 br_entry->iter = htab->stub_iteration;
10999 br_entry->offset = htab->brlt->size;
11000 htab->brlt->size += 8;
11001
11002 if (htab->relbrlt != NULL)
11003 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11004 else if (info->emitrelocations)
11005 {
11006 htab->brlt->reloc_count += 1;
11007 htab->brlt->flags |= SEC_RELOC;
11008 }
11009 }
11010
11011 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11012 off = (br_entry->offset
11013 + htab->brlt->output_offset
11014 + htab->brlt->output_section->vma
11015 - elf_gp (htab->brlt->output_section->owner)
11016 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11017
11018 if (info->emitrelocations)
11019 {
11020 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
11021 stub_entry->stub_sec->flags |= SEC_RELOC;
11022 }
11023
11024 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11025 {
11026 size = 12;
11027 if (PPC_HA (off) != 0)
11028 size = 16;
11029 }
11030 else
11031 {
11032 size = 16;
11033 if (PPC_HA (off) != 0)
11034 size += 4;
11035
11036 if (PPC_HA (r2off) != 0)
11037 size += 4;
11038 if (PPC_LO (r2off) != 0)
11039 size += 4;
11040 }
11041 }
11042 else if (info->emitrelocations)
11043 {
11044 stub_entry->stub_sec->reloc_count += 1;
11045 stub_entry->stub_sec->flags |= SEC_RELOC;
11046 }
11047 }
11048
11049 stub_entry->stub_sec->size += size;
11050 return TRUE;
11051 }
11052
11053 /* Set up various things so that we can make a list of input sections
11054 for each output section included in the link. Returns -1 on error,
11055 0 when no stubs will be needed, and 1 on success. */
11056
11057 int
11058 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11059 {
11060 bfd *input_bfd;
11061 int top_id, top_index, id;
11062 asection *section;
11063 asection **input_list;
11064 bfd_size_type amt;
11065 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11066
11067 if (htab == NULL)
11068 return -1;
11069
11070 /* Find the top input section id. */
11071 for (input_bfd = info->input_bfds, top_id = 3;
11072 input_bfd != NULL;
11073 input_bfd = input_bfd->link.next)
11074 {
11075 for (section = input_bfd->sections;
11076 section != NULL;
11077 section = section->next)
11078 {
11079 if (top_id < section->id)
11080 top_id = section->id;
11081 }
11082 }
11083
11084 htab->top_id = top_id;
11085 amt = sizeof (struct map_stub) * (top_id + 1);
11086 htab->stub_group = bfd_zmalloc (amt);
11087 if (htab->stub_group == NULL)
11088 return -1;
11089
11090 /* Set toc_off for com, und, abs and ind sections. */
11091 for (id = 0; id < 3; id++)
11092 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11093
11094 /* We can't use output_bfd->section_count here to find the top output
11095 section index as some sections may have been removed, and
11096 strip_excluded_output_sections doesn't renumber the indices. */
11097 for (section = info->output_bfd->sections, top_index = 0;
11098 section != NULL;
11099 section = section->next)
11100 {
11101 if (top_index < section->index)
11102 top_index = section->index;
11103 }
11104
11105 htab->top_index = top_index;
11106 amt = sizeof (asection *) * (top_index + 1);
11107 input_list = bfd_zmalloc (amt);
11108 htab->input_list = input_list;
11109 if (input_list == NULL)
11110 return -1;
11111
11112 return 1;
11113 }
11114
11115 /* Set up for first pass at multitoc partitioning. */
11116
11117 void
11118 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11119 {
11120 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11121
11122 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11123 htab->toc_bfd = NULL;
11124 htab->toc_first_sec = NULL;
11125 }
11126
11127 /* The linker repeatedly calls this function for each TOC input section
11128 and linker generated GOT section. Group input bfds such that the toc
11129 within a group is less than 64k in size. */
11130
11131 bfd_boolean
11132 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11133 {
11134 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11135 bfd_vma addr, off, limit;
11136
11137 if (htab == NULL)
11138 return FALSE;
11139
11140 if (!htab->second_toc_pass)
11141 {
11142 /* Keep track of the first .toc or .got section for this input bfd. */
11143 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11144
11145 if (new_bfd)
11146 {
11147 htab->toc_bfd = isec->owner;
11148 htab->toc_first_sec = isec;
11149 }
11150
11151 addr = isec->output_offset + isec->output_section->vma;
11152 off = addr - htab->toc_curr;
11153 limit = 0x80008000;
11154 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11155 limit = 0x10000;
11156 if (off + isec->size > limit)
11157 {
11158 addr = (htab->toc_first_sec->output_offset
11159 + htab->toc_first_sec->output_section->vma);
11160 htab->toc_curr = addr;
11161 }
11162
11163 /* toc_curr is the base address of this toc group. Set elf_gp
11164 for the input section to be the offset relative to the
11165 output toc base plus 0x8000. Making the input elf_gp an
11166 offset allows us to move the toc as a whole without
11167 recalculating input elf_gp. */
11168 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11169 off += TOC_BASE_OFF;
11170
11171 /* Die if someone uses a linker script that doesn't keep input
11172 file .toc and .got together. */
11173 if (new_bfd
11174 && elf_gp (isec->owner) != 0
11175 && elf_gp (isec->owner) != off)
11176 return FALSE;
11177
11178 elf_gp (isec->owner) = off;
11179 return TRUE;
11180 }
11181
11182 /* During the second pass toc_first_sec points to the start of
11183 a toc group, and toc_curr is used to track the old elf_gp.
11184 We use toc_bfd to ensure we only look at each bfd once. */
11185 if (htab->toc_bfd == isec->owner)
11186 return TRUE;
11187 htab->toc_bfd = isec->owner;
11188
11189 if (htab->toc_first_sec == NULL
11190 || htab->toc_curr != elf_gp (isec->owner))
11191 {
11192 htab->toc_curr = elf_gp (isec->owner);
11193 htab->toc_first_sec = isec;
11194 }
11195 addr = (htab->toc_first_sec->output_offset
11196 + htab->toc_first_sec->output_section->vma);
11197 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11198 elf_gp (isec->owner) = off;
11199
11200 return TRUE;
11201 }
11202
11203 /* Called via elf_link_hash_traverse to merge GOT entries for global
11204 symbol H. */
11205
11206 static bfd_boolean
11207 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11208 {
11209 if (h->root.type == bfd_link_hash_indirect)
11210 return TRUE;
11211
11212 merge_got_entries (&h->got.glist);
11213
11214 return TRUE;
11215 }
11216
11217 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11218 symbol H. */
11219
11220 static bfd_boolean
11221 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11222 {
11223 struct got_entry *gent;
11224
11225 if (h->root.type == bfd_link_hash_indirect)
11226 return TRUE;
11227
11228 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11229 if (!gent->is_indirect)
11230 allocate_got (h, (struct bfd_link_info *) inf, gent);
11231 return TRUE;
11232 }
11233
11234 /* Called on the first multitoc pass after the last call to
11235 ppc64_elf_next_toc_section. This function removes duplicate GOT
11236 entries. */
11237
11238 bfd_boolean
11239 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11240 {
11241 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11242 struct bfd *ibfd, *ibfd2;
11243 bfd_boolean done_something;
11244
11245 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11246
11247 if (!htab->do_multi_toc)
11248 return FALSE;
11249
11250 /* Merge global sym got entries within a toc group. */
11251 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11252
11253 /* And tlsld_got. */
11254 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11255 {
11256 struct got_entry *ent, *ent2;
11257
11258 if (!is_ppc64_elf (ibfd))
11259 continue;
11260
11261 ent = ppc64_tlsld_got (ibfd);
11262 if (!ent->is_indirect
11263 && ent->got.offset != (bfd_vma) -1)
11264 {
11265 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11266 {
11267 if (!is_ppc64_elf (ibfd2))
11268 continue;
11269
11270 ent2 = ppc64_tlsld_got (ibfd2);
11271 if (!ent2->is_indirect
11272 && ent2->got.offset != (bfd_vma) -1
11273 && elf_gp (ibfd2) == elf_gp (ibfd))
11274 {
11275 ent2->is_indirect = TRUE;
11276 ent2->got.ent = ent;
11277 }
11278 }
11279 }
11280 }
11281
11282 /* Zap sizes of got sections. */
11283 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11284 htab->elf.irelplt->size -= htab->got_reli_size;
11285 htab->got_reli_size = 0;
11286
11287 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11288 {
11289 asection *got, *relgot;
11290
11291 if (!is_ppc64_elf (ibfd))
11292 continue;
11293
11294 got = ppc64_elf_tdata (ibfd)->got;
11295 if (got != NULL)
11296 {
11297 got->rawsize = got->size;
11298 got->size = 0;
11299 relgot = ppc64_elf_tdata (ibfd)->relgot;
11300 relgot->rawsize = relgot->size;
11301 relgot->size = 0;
11302 }
11303 }
11304
11305 /* Now reallocate the got, local syms first. We don't need to
11306 allocate section contents again since we never increase size. */
11307 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11308 {
11309 struct got_entry **lgot_ents;
11310 struct got_entry **end_lgot_ents;
11311 struct plt_entry **local_plt;
11312 struct plt_entry **end_local_plt;
11313 unsigned char *lgot_masks;
11314 bfd_size_type locsymcount;
11315 Elf_Internal_Shdr *symtab_hdr;
11316 asection *s;
11317
11318 if (!is_ppc64_elf (ibfd))
11319 continue;
11320
11321 lgot_ents = elf_local_got_ents (ibfd);
11322 if (!lgot_ents)
11323 continue;
11324
11325 symtab_hdr = &elf_symtab_hdr (ibfd);
11326 locsymcount = symtab_hdr->sh_info;
11327 end_lgot_ents = lgot_ents + locsymcount;
11328 local_plt = (struct plt_entry **) end_lgot_ents;
11329 end_local_plt = local_plt + locsymcount;
11330 lgot_masks = (unsigned char *) end_local_plt;
11331 s = ppc64_elf_tdata (ibfd)->got;
11332 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11333 {
11334 struct got_entry *ent;
11335
11336 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11337 {
11338 unsigned int ent_size = 8;
11339 unsigned int rel_size = sizeof (Elf64_External_Rela);
11340
11341 ent->got.offset = s->size;
11342 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11343 {
11344 ent_size *= 2;
11345 rel_size *= 2;
11346 }
11347 s->size += ent_size;
11348 if ((*lgot_masks & PLT_IFUNC) != 0)
11349 {
11350 htab->elf.irelplt->size += rel_size;
11351 htab->got_reli_size += rel_size;
11352 }
11353 else if (info->shared)
11354 {
11355 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11356 srel->size += rel_size;
11357 }
11358 }
11359 }
11360 }
11361
11362 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11363
11364 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11365 {
11366 struct got_entry *ent;
11367
11368 if (!is_ppc64_elf (ibfd))
11369 continue;
11370
11371 ent = ppc64_tlsld_got (ibfd);
11372 if (!ent->is_indirect
11373 && ent->got.offset != (bfd_vma) -1)
11374 {
11375 asection *s = ppc64_elf_tdata (ibfd)->got;
11376 ent->got.offset = s->size;
11377 s->size += 16;
11378 if (info->shared)
11379 {
11380 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11381 srel->size += sizeof (Elf64_External_Rela);
11382 }
11383 }
11384 }
11385
11386 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11387 if (!done_something)
11388 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11389 {
11390 asection *got;
11391
11392 if (!is_ppc64_elf (ibfd))
11393 continue;
11394
11395 got = ppc64_elf_tdata (ibfd)->got;
11396 if (got != NULL)
11397 {
11398 done_something = got->rawsize != got->size;
11399 if (done_something)
11400 break;
11401 }
11402 }
11403
11404 if (done_something)
11405 (*htab->params->layout_sections_again) ();
11406
11407 /* Set up for second pass over toc sections to recalculate elf_gp
11408 on input sections. */
11409 htab->toc_bfd = NULL;
11410 htab->toc_first_sec = NULL;
11411 htab->second_toc_pass = TRUE;
11412 return done_something;
11413 }
11414
11415 /* Called after second pass of multitoc partitioning. */
11416
11417 void
11418 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11419 {
11420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11421
11422 /* After the second pass, toc_curr tracks the TOC offset used
11423 for code sections below in ppc64_elf_next_input_section. */
11424 htab->toc_curr = TOC_BASE_OFF;
11425 }
11426
11427 /* No toc references were found in ISEC. If the code in ISEC makes no
11428 calls, then there's no need to use toc adjusting stubs when branching
11429 into ISEC. Actually, indirect calls from ISEC are OK as they will
11430 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11431 needed, and 2 if a cyclical call-graph was found but no other reason
11432 for a stub was detected. If called from the top level, a return of
11433 2 means the same as a return of 0. */
11434
11435 static int
11436 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11437 {
11438 int ret;
11439
11440 /* Mark this section as checked. */
11441 isec->call_check_done = 1;
11442
11443 /* We know none of our code bearing sections will need toc stubs. */
11444 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11445 return 0;
11446
11447 if (isec->size == 0)
11448 return 0;
11449
11450 if (isec->output_section == NULL)
11451 return 0;
11452
11453 ret = 0;
11454 if (isec->reloc_count != 0)
11455 {
11456 Elf_Internal_Rela *relstart, *rel;
11457 Elf_Internal_Sym *local_syms;
11458 struct ppc_link_hash_table *htab;
11459
11460 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11461 info->keep_memory);
11462 if (relstart == NULL)
11463 return -1;
11464
11465 /* Look for branches to outside of this section. */
11466 local_syms = NULL;
11467 htab = ppc_hash_table (info);
11468 if (htab == NULL)
11469 return -1;
11470
11471 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11472 {
11473 enum elf_ppc64_reloc_type r_type;
11474 unsigned long r_symndx;
11475 struct elf_link_hash_entry *h;
11476 struct ppc_link_hash_entry *eh;
11477 Elf_Internal_Sym *sym;
11478 asection *sym_sec;
11479 struct _opd_sec_data *opd;
11480 bfd_vma sym_value;
11481 bfd_vma dest;
11482
11483 r_type = ELF64_R_TYPE (rel->r_info);
11484 if (r_type != R_PPC64_REL24
11485 && r_type != R_PPC64_REL14
11486 && r_type != R_PPC64_REL14_BRTAKEN
11487 && r_type != R_PPC64_REL14_BRNTAKEN)
11488 continue;
11489
11490 r_symndx = ELF64_R_SYM (rel->r_info);
11491 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11492 isec->owner))
11493 {
11494 ret = -1;
11495 break;
11496 }
11497
11498 /* Calls to dynamic lib functions go through a plt call stub
11499 that uses r2. */
11500 eh = (struct ppc_link_hash_entry *) h;
11501 if (eh != NULL
11502 && (eh->elf.plt.plist != NULL
11503 || (eh->oh != NULL
11504 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11505 {
11506 ret = 1;
11507 break;
11508 }
11509
11510 if (sym_sec == NULL)
11511 /* Ignore other undefined symbols. */
11512 continue;
11513
11514 /* Assume branches to other sections not included in the
11515 link need stubs too, to cover -R and absolute syms. */
11516 if (sym_sec->output_section == NULL)
11517 {
11518 ret = 1;
11519 break;
11520 }
11521
11522 if (h == NULL)
11523 sym_value = sym->st_value;
11524 else
11525 {
11526 if (h->root.type != bfd_link_hash_defined
11527 && h->root.type != bfd_link_hash_defweak)
11528 abort ();
11529 sym_value = h->root.u.def.value;
11530 }
11531 sym_value += rel->r_addend;
11532
11533 /* If this branch reloc uses an opd sym, find the code section. */
11534 opd = get_opd_info (sym_sec);
11535 if (opd != NULL)
11536 {
11537 if (h == NULL && opd->adjust != NULL)
11538 {
11539 long adjust;
11540
11541 adjust = opd->adjust[sym->st_value / 8];
11542 if (adjust == -1)
11543 /* Assume deleted functions won't ever be called. */
11544 continue;
11545 sym_value += adjust;
11546 }
11547
11548 dest = opd_entry_value (sym_sec, sym_value,
11549 &sym_sec, NULL, FALSE);
11550 if (dest == (bfd_vma) -1)
11551 continue;
11552 }
11553 else
11554 dest = (sym_value
11555 + sym_sec->output_offset
11556 + sym_sec->output_section->vma);
11557
11558 /* Ignore branch to self. */
11559 if (sym_sec == isec)
11560 continue;
11561
11562 /* If the called function uses the toc, we need a stub. */
11563 if (sym_sec->has_toc_reloc
11564 || sym_sec->makes_toc_func_call)
11565 {
11566 ret = 1;
11567 break;
11568 }
11569
11570 /* Assume any branch that needs a long branch stub might in fact
11571 need a plt_branch stub. A plt_branch stub uses r2. */
11572 else if (dest - (isec->output_offset
11573 + isec->output_section->vma
11574 + rel->r_offset) + (1 << 25)
11575 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11576 ? h->other
11577 : sym->st_other))
11578 {
11579 ret = 1;
11580 break;
11581 }
11582
11583 /* If calling back to a section in the process of being
11584 tested, we can't say for sure that no toc adjusting stubs
11585 are needed, so don't return zero. */
11586 else if (sym_sec->call_check_in_progress)
11587 ret = 2;
11588
11589 /* Branches to another section that itself doesn't have any TOC
11590 references are OK. Recursively call ourselves to check. */
11591 else if (!sym_sec->call_check_done)
11592 {
11593 int recur;
11594
11595 /* Mark current section as indeterminate, so that other
11596 sections that call back to current won't be marked as
11597 known. */
11598 isec->call_check_in_progress = 1;
11599 recur = toc_adjusting_stub_needed (info, sym_sec);
11600 isec->call_check_in_progress = 0;
11601
11602 if (recur != 0)
11603 {
11604 ret = recur;
11605 if (recur != 2)
11606 break;
11607 }
11608 }
11609 }
11610
11611 if (local_syms != NULL
11612 && (elf_symtab_hdr (isec->owner).contents
11613 != (unsigned char *) local_syms))
11614 free (local_syms);
11615 if (elf_section_data (isec)->relocs != relstart)
11616 free (relstart);
11617 }
11618
11619 if ((ret & 1) == 0
11620 && isec->map_head.s != NULL
11621 && (strcmp (isec->output_section->name, ".init") == 0
11622 || strcmp (isec->output_section->name, ".fini") == 0))
11623 {
11624 if (isec->map_head.s->has_toc_reloc
11625 || isec->map_head.s->makes_toc_func_call)
11626 ret = 1;
11627 else if (!isec->map_head.s->call_check_done)
11628 {
11629 int recur;
11630 isec->call_check_in_progress = 1;
11631 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11632 isec->call_check_in_progress = 0;
11633 if (recur != 0)
11634 ret = recur;
11635 }
11636 }
11637
11638 if (ret == 1)
11639 isec->makes_toc_func_call = 1;
11640
11641 return ret;
11642 }
11643
11644 /* The linker repeatedly calls this function for each input section,
11645 in the order that input sections are linked into output sections.
11646 Build lists of input sections to determine groupings between which
11647 we may insert linker stubs. */
11648
11649 bfd_boolean
11650 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11651 {
11652 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11653
11654 if (htab == NULL)
11655 return FALSE;
11656
11657 if ((isec->output_section->flags & SEC_CODE) != 0
11658 && isec->output_section->index <= htab->top_index)
11659 {
11660 asection **list = htab->input_list + isec->output_section->index;
11661 /* Steal the link_sec pointer for our list. */
11662 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11663 /* This happens to make the list in reverse order,
11664 which is what we want. */
11665 PREV_SEC (isec) = *list;
11666 *list = isec;
11667 }
11668
11669 if (htab->multi_toc_needed)
11670 {
11671 /* Analyse sections that aren't already flagged as needing a
11672 valid toc pointer. Exclude .fixup for the linux kernel.
11673 .fixup contains branches, but only back to the function that
11674 hit an exception. */
11675 if (!(isec->has_toc_reloc
11676 || (isec->flags & SEC_CODE) == 0
11677 || strcmp (isec->name, ".fixup") == 0
11678 || isec->call_check_done))
11679 {
11680 if (toc_adjusting_stub_needed (info, isec) < 0)
11681 return FALSE;
11682 }
11683 /* Make all sections use the TOC assigned for this object file.
11684 This will be wrong for pasted sections; We fix that in
11685 check_pasted_section(). */
11686 if (elf_gp (isec->owner) != 0)
11687 htab->toc_curr = elf_gp (isec->owner);
11688 }
11689
11690 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11691 return TRUE;
11692 }
11693
11694 /* Check that all .init and .fini sections use the same toc, if they
11695 have toc relocs. */
11696
11697 static bfd_boolean
11698 check_pasted_section (struct bfd_link_info *info, const char *name)
11699 {
11700 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11701
11702 if (o != NULL)
11703 {
11704 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11705 bfd_vma toc_off = 0;
11706 asection *i;
11707
11708 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11709 if (i->has_toc_reloc)
11710 {
11711 if (toc_off == 0)
11712 toc_off = htab->stub_group[i->id].toc_off;
11713 else if (toc_off != htab->stub_group[i->id].toc_off)
11714 return FALSE;
11715 }
11716
11717 if (toc_off == 0)
11718 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11719 if (i->makes_toc_func_call)
11720 {
11721 toc_off = htab->stub_group[i->id].toc_off;
11722 break;
11723 }
11724
11725 /* Make sure the whole pasted function uses the same toc offset. */
11726 if (toc_off != 0)
11727 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11728 htab->stub_group[i->id].toc_off = toc_off;
11729 }
11730 return TRUE;
11731 }
11732
11733 bfd_boolean
11734 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11735 {
11736 return (check_pasted_section (info, ".init")
11737 & check_pasted_section (info, ".fini"));
11738 }
11739
11740 /* See whether we can group stub sections together. Grouping stub
11741 sections may result in fewer stubs. More importantly, we need to
11742 put all .init* and .fini* stubs at the beginning of the .init or
11743 .fini output sections respectively, because glibc splits the
11744 _init and _fini functions into multiple parts. Putting a stub in
11745 the middle of a function is not a good idea. */
11746
11747 static void
11748 group_sections (struct ppc_link_hash_table *htab,
11749 bfd_size_type stub_group_size,
11750 bfd_boolean stubs_always_before_branch)
11751 {
11752 asection **list;
11753 bfd_size_type stub14_group_size;
11754 bfd_boolean suppress_size_errors;
11755
11756 suppress_size_errors = FALSE;
11757 stub14_group_size = stub_group_size;
11758 if (stub_group_size == 1)
11759 {
11760 /* Default values. */
11761 if (stubs_always_before_branch)
11762 {
11763 stub_group_size = 0x1e00000;
11764 stub14_group_size = 0x7800;
11765 }
11766 else
11767 {
11768 stub_group_size = 0x1c00000;
11769 stub14_group_size = 0x7000;
11770 }
11771 suppress_size_errors = TRUE;
11772 }
11773
11774 list = htab->input_list + htab->top_index;
11775 do
11776 {
11777 asection *tail = *list;
11778 while (tail != NULL)
11779 {
11780 asection *curr;
11781 asection *prev;
11782 bfd_size_type total;
11783 bfd_boolean big_sec;
11784 bfd_vma curr_toc;
11785
11786 curr = tail;
11787 total = tail->size;
11788 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11789 && ppc64_elf_section_data (tail)->has_14bit_branch
11790 ? stub14_group_size : stub_group_size);
11791 if (big_sec && !suppress_size_errors)
11792 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11793 tail->owner, tail);
11794 curr_toc = htab->stub_group[tail->id].toc_off;
11795
11796 while ((prev = PREV_SEC (curr)) != NULL
11797 && ((total += curr->output_offset - prev->output_offset)
11798 < (ppc64_elf_section_data (prev) != NULL
11799 && ppc64_elf_section_data (prev)->has_14bit_branch
11800 ? stub14_group_size : stub_group_size))
11801 && htab->stub_group[prev->id].toc_off == curr_toc)
11802 curr = prev;
11803
11804 /* OK, the size from the start of CURR to the end is less
11805 than stub_group_size and thus can be handled by one stub
11806 section. (or the tail section is itself larger than
11807 stub_group_size, in which case we may be toast.) We
11808 should really be keeping track of the total size of stubs
11809 added here, as stubs contribute to the final output
11810 section size. That's a little tricky, and this way will
11811 only break if stubs added make the total size more than
11812 2^25, ie. for the default stub_group_size, if stubs total
11813 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11814 do
11815 {
11816 prev = PREV_SEC (tail);
11817 /* Set up this stub group. */
11818 htab->stub_group[tail->id].link_sec = curr;
11819 }
11820 while (tail != curr && (tail = prev) != NULL);
11821
11822 /* But wait, there's more! Input sections up to stub_group_size
11823 bytes before the stub section can be handled by it too.
11824 Don't do this if we have a really large section after the
11825 stubs, as adding more stubs increases the chance that
11826 branches may not reach into the stub section. */
11827 if (!stubs_always_before_branch && !big_sec)
11828 {
11829 total = 0;
11830 while (prev != NULL
11831 && ((total += tail->output_offset - prev->output_offset)
11832 < (ppc64_elf_section_data (prev) != NULL
11833 && ppc64_elf_section_data (prev)->has_14bit_branch
11834 ? stub14_group_size : stub_group_size))
11835 && htab->stub_group[prev->id].toc_off == curr_toc)
11836 {
11837 tail = prev;
11838 prev = PREV_SEC (tail);
11839 htab->stub_group[tail->id].link_sec = curr;
11840 }
11841 }
11842 tail = prev;
11843 }
11844 }
11845 while (list-- != htab->input_list);
11846 free (htab->input_list);
11847 #undef PREV_SEC
11848 }
11849
11850 static const unsigned char glink_eh_frame_cie[] =
11851 {
11852 0, 0, 0, 16, /* length. */
11853 0, 0, 0, 0, /* id. */
11854 1, /* CIE version. */
11855 'z', 'R', 0, /* Augmentation string. */
11856 4, /* Code alignment. */
11857 0x78, /* Data alignment. */
11858 65, /* RA reg. */
11859 1, /* Augmentation size. */
11860 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11861 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11862 };
11863
11864 /* Stripping output sections is normally done before dynamic section
11865 symbols have been allocated. This function is called later, and
11866 handles cases like htab->brlt which is mapped to its own output
11867 section. */
11868
11869 static void
11870 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11871 {
11872 if (isec->size == 0
11873 && isec->output_section->size == 0
11874 && !(isec->output_section->flags & SEC_KEEP)
11875 && !bfd_section_removed_from_list (info->output_bfd,
11876 isec->output_section)
11877 && elf_section_data (isec->output_section)->dynindx == 0)
11878 {
11879 isec->output_section->flags |= SEC_EXCLUDE;
11880 bfd_section_list_remove (info->output_bfd, isec->output_section);
11881 info->output_bfd->section_count--;
11882 }
11883 }
11884
11885 /* Determine and set the size of the stub section for a final link.
11886
11887 The basic idea here is to examine all the relocations looking for
11888 PC-relative calls to a target that is unreachable with a "bl"
11889 instruction. */
11890
11891 bfd_boolean
11892 ppc64_elf_size_stubs (struct bfd_link_info *info)
11893 {
11894 bfd_size_type stub_group_size;
11895 bfd_boolean stubs_always_before_branch;
11896 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11897
11898 if (htab == NULL)
11899 return FALSE;
11900
11901 if (htab->params->plt_thread_safe == -1 && !info->executable)
11902 htab->params->plt_thread_safe = 1;
11903 if (!htab->opd_abi)
11904 htab->params->plt_thread_safe = 0;
11905 else if (htab->params->plt_thread_safe == -1)
11906 {
11907 static const char *const thread_starter[] =
11908 {
11909 "pthread_create",
11910 /* libstdc++ */
11911 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11912 /* librt */
11913 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11914 "mq_notify", "create_timer",
11915 /* libanl */
11916 "getaddrinfo_a",
11917 /* libgomp */
11918 "GOMP_parallel_start",
11919 "GOMP_parallel_loop_static_start",
11920 "GOMP_parallel_loop_dynamic_start",
11921 "GOMP_parallel_loop_guided_start",
11922 "GOMP_parallel_loop_runtime_start",
11923 "GOMP_parallel_sections_start",
11924 };
11925 unsigned i;
11926
11927 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11928 {
11929 struct elf_link_hash_entry *h;
11930 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11931 FALSE, FALSE, TRUE);
11932 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
11933 if (htab->params->plt_thread_safe)
11934 break;
11935 }
11936 }
11937 stubs_always_before_branch = htab->params->group_size < 0;
11938 if (htab->params->group_size < 0)
11939 stub_group_size = -htab->params->group_size;
11940 else
11941 stub_group_size = htab->params->group_size;
11942
11943 group_sections (htab, stub_group_size, stubs_always_before_branch);
11944
11945 while (1)
11946 {
11947 bfd *input_bfd;
11948 unsigned int bfd_indx;
11949 asection *stub_sec;
11950
11951 htab->stub_iteration += 1;
11952
11953 for (input_bfd = info->input_bfds, bfd_indx = 0;
11954 input_bfd != NULL;
11955 input_bfd = input_bfd->link.next, bfd_indx++)
11956 {
11957 Elf_Internal_Shdr *symtab_hdr;
11958 asection *section;
11959 Elf_Internal_Sym *local_syms = NULL;
11960
11961 if (!is_ppc64_elf (input_bfd))
11962 continue;
11963
11964 /* We'll need the symbol table in a second. */
11965 symtab_hdr = &elf_symtab_hdr (input_bfd);
11966 if (symtab_hdr->sh_info == 0)
11967 continue;
11968
11969 /* Walk over each section attached to the input bfd. */
11970 for (section = input_bfd->sections;
11971 section != NULL;
11972 section = section->next)
11973 {
11974 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11975
11976 /* If there aren't any relocs, then there's nothing more
11977 to do. */
11978 if ((section->flags & SEC_RELOC) == 0
11979 || (section->flags & SEC_ALLOC) == 0
11980 || (section->flags & SEC_LOAD) == 0
11981 || (section->flags & SEC_CODE) == 0
11982 || section->reloc_count == 0)
11983 continue;
11984
11985 /* If this section is a link-once section that will be
11986 discarded, then don't create any stubs. */
11987 if (section->output_section == NULL
11988 || section->output_section->owner != info->output_bfd)
11989 continue;
11990
11991 /* Get the relocs. */
11992 internal_relocs
11993 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11994 info->keep_memory);
11995 if (internal_relocs == NULL)
11996 goto error_ret_free_local;
11997
11998 /* Now examine each relocation. */
11999 irela = internal_relocs;
12000 irelaend = irela + section->reloc_count;
12001 for (; irela < irelaend; irela++)
12002 {
12003 enum elf_ppc64_reloc_type r_type;
12004 unsigned int r_indx;
12005 enum ppc_stub_type stub_type;
12006 struct ppc_stub_hash_entry *stub_entry;
12007 asection *sym_sec, *code_sec;
12008 bfd_vma sym_value, code_value;
12009 bfd_vma destination;
12010 unsigned long local_off;
12011 bfd_boolean ok_dest;
12012 struct ppc_link_hash_entry *hash;
12013 struct ppc_link_hash_entry *fdh;
12014 struct elf_link_hash_entry *h;
12015 Elf_Internal_Sym *sym;
12016 char *stub_name;
12017 const asection *id_sec;
12018 struct _opd_sec_data *opd;
12019 struct plt_entry *plt_ent;
12020
12021 r_type = ELF64_R_TYPE (irela->r_info);
12022 r_indx = ELF64_R_SYM (irela->r_info);
12023
12024 if (r_type >= R_PPC64_max)
12025 {
12026 bfd_set_error (bfd_error_bad_value);
12027 goto error_ret_free_internal;
12028 }
12029
12030 /* Only look for stubs on branch instructions. */
12031 if (r_type != R_PPC64_REL24
12032 && r_type != R_PPC64_REL14
12033 && r_type != R_PPC64_REL14_BRTAKEN
12034 && r_type != R_PPC64_REL14_BRNTAKEN)
12035 continue;
12036
12037 /* Now determine the call target, its name, value,
12038 section. */
12039 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12040 r_indx, input_bfd))
12041 goto error_ret_free_internal;
12042 hash = (struct ppc_link_hash_entry *) h;
12043
12044 ok_dest = FALSE;
12045 fdh = NULL;
12046 sym_value = 0;
12047 if (hash == NULL)
12048 {
12049 sym_value = sym->st_value;
12050 ok_dest = TRUE;
12051 }
12052 else if (hash->elf.root.type == bfd_link_hash_defined
12053 || hash->elf.root.type == bfd_link_hash_defweak)
12054 {
12055 sym_value = hash->elf.root.u.def.value;
12056 if (sym_sec->output_section != NULL)
12057 ok_dest = TRUE;
12058 }
12059 else if (hash->elf.root.type == bfd_link_hash_undefweak
12060 || hash->elf.root.type == bfd_link_hash_undefined)
12061 {
12062 /* Recognise an old ABI func code entry sym, and
12063 use the func descriptor sym instead if it is
12064 defined. */
12065 if (hash->elf.root.root.string[0] == '.'
12066 && (fdh = lookup_fdh (hash, htab)) != NULL)
12067 {
12068 if (fdh->elf.root.type == bfd_link_hash_defined
12069 || fdh->elf.root.type == bfd_link_hash_defweak)
12070 {
12071 sym_sec = fdh->elf.root.u.def.section;
12072 sym_value = fdh->elf.root.u.def.value;
12073 if (sym_sec->output_section != NULL)
12074 ok_dest = TRUE;
12075 }
12076 else
12077 fdh = NULL;
12078 }
12079 }
12080 else
12081 {
12082 bfd_set_error (bfd_error_bad_value);
12083 goto error_ret_free_internal;
12084 }
12085
12086 destination = 0;
12087 local_off = 0;
12088 if (ok_dest)
12089 {
12090 sym_value += irela->r_addend;
12091 destination = (sym_value
12092 + sym_sec->output_offset
12093 + sym_sec->output_section->vma);
12094 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12095 ? hash->elf.other
12096 : sym->st_other);
12097 }
12098
12099 code_sec = sym_sec;
12100 code_value = sym_value;
12101 opd = get_opd_info (sym_sec);
12102 if (opd != NULL)
12103 {
12104 bfd_vma dest;
12105
12106 if (hash == NULL && opd->adjust != NULL)
12107 {
12108 long adjust = opd->adjust[sym_value / 8];
12109 if (adjust == -1)
12110 continue;
12111 code_value += adjust;
12112 sym_value += adjust;
12113 }
12114 dest = opd_entry_value (sym_sec, sym_value,
12115 &code_sec, &code_value, FALSE);
12116 if (dest != (bfd_vma) -1)
12117 {
12118 destination = dest;
12119 if (fdh != NULL)
12120 {
12121 /* Fixup old ABI sym to point at code
12122 entry. */
12123 hash->elf.root.type = bfd_link_hash_defweak;
12124 hash->elf.root.u.def.section = code_sec;
12125 hash->elf.root.u.def.value = code_value;
12126 }
12127 }
12128 }
12129
12130 /* Determine what (if any) linker stub is needed. */
12131 plt_ent = NULL;
12132 stub_type = ppc_type_of_stub (section, irela, &hash,
12133 &plt_ent, destination,
12134 local_off);
12135
12136 if (stub_type != ppc_stub_plt_call)
12137 {
12138 /* Check whether we need a TOC adjusting stub.
12139 Since the linker pastes together pieces from
12140 different object files when creating the
12141 _init and _fini functions, it may be that a
12142 call to what looks like a local sym is in
12143 fact a call needing a TOC adjustment. */
12144 if (code_sec != NULL
12145 && code_sec->output_section != NULL
12146 && (htab->stub_group[code_sec->id].toc_off
12147 != htab->stub_group[section->id].toc_off)
12148 && (code_sec->has_toc_reloc
12149 || code_sec->makes_toc_func_call))
12150 stub_type = ppc_stub_long_branch_r2off;
12151 }
12152
12153 if (stub_type == ppc_stub_none)
12154 continue;
12155
12156 /* __tls_get_addr calls might be eliminated. */
12157 if (stub_type != ppc_stub_plt_call
12158 && hash != NULL
12159 && (hash == htab->tls_get_addr
12160 || hash == htab->tls_get_addr_fd)
12161 && section->has_tls_reloc
12162 && irela != internal_relocs)
12163 {
12164 /* Get tls info. */
12165 unsigned char *tls_mask;
12166
12167 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12168 irela - 1, input_bfd))
12169 goto error_ret_free_internal;
12170 if (*tls_mask != 0)
12171 continue;
12172 }
12173
12174 if (stub_type == ppc_stub_plt_call
12175 && irela + 1 < irelaend
12176 && irela[1].r_offset == irela->r_offset + 4
12177 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12178 {
12179 if (!tocsave_find (htab, INSERT,
12180 &local_syms, irela + 1, input_bfd))
12181 goto error_ret_free_internal;
12182 }
12183 else if (stub_type == ppc_stub_plt_call)
12184 stub_type = ppc_stub_plt_call_r2save;
12185
12186 /* Support for grouping stub sections. */
12187 id_sec = htab->stub_group[section->id].link_sec;
12188
12189 /* Get the name of this stub. */
12190 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12191 if (!stub_name)
12192 goto error_ret_free_internal;
12193
12194 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12195 stub_name, FALSE, FALSE);
12196 if (stub_entry != NULL)
12197 {
12198 /* The proper stub has already been created. */
12199 free (stub_name);
12200 if (stub_type == ppc_stub_plt_call_r2save)
12201 stub_entry->stub_type = stub_type;
12202 continue;
12203 }
12204
12205 stub_entry = ppc_add_stub (stub_name, section, info);
12206 if (stub_entry == NULL)
12207 {
12208 free (stub_name);
12209 error_ret_free_internal:
12210 if (elf_section_data (section)->relocs == NULL)
12211 free (internal_relocs);
12212 error_ret_free_local:
12213 if (local_syms != NULL
12214 && (symtab_hdr->contents
12215 != (unsigned char *) local_syms))
12216 free (local_syms);
12217 return FALSE;
12218 }
12219
12220 stub_entry->stub_type = stub_type;
12221 if (stub_type != ppc_stub_plt_call
12222 && stub_type != ppc_stub_plt_call_r2save)
12223 {
12224 stub_entry->target_value = code_value;
12225 stub_entry->target_section = code_sec;
12226 }
12227 else
12228 {
12229 stub_entry->target_value = sym_value;
12230 stub_entry->target_section = sym_sec;
12231 }
12232 stub_entry->h = hash;
12233 stub_entry->plt_ent = plt_ent;
12234 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12235
12236 if (stub_entry->h != NULL)
12237 htab->stub_globals += 1;
12238 }
12239
12240 /* We're done with the internal relocs, free them. */
12241 if (elf_section_data (section)->relocs != internal_relocs)
12242 free (internal_relocs);
12243 }
12244
12245 if (local_syms != NULL
12246 && symtab_hdr->contents != (unsigned char *) local_syms)
12247 {
12248 if (!info->keep_memory)
12249 free (local_syms);
12250 else
12251 symtab_hdr->contents = (unsigned char *) local_syms;
12252 }
12253 }
12254
12255 /* We may have added some stubs. Find out the new size of the
12256 stub sections. */
12257 for (stub_sec = htab->params->stub_bfd->sections;
12258 stub_sec != NULL;
12259 stub_sec = stub_sec->next)
12260 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12261 {
12262 stub_sec->rawsize = stub_sec->size;
12263 stub_sec->size = 0;
12264 stub_sec->reloc_count = 0;
12265 stub_sec->flags &= ~SEC_RELOC;
12266 }
12267
12268 htab->brlt->size = 0;
12269 htab->brlt->reloc_count = 0;
12270 htab->brlt->flags &= ~SEC_RELOC;
12271 if (htab->relbrlt != NULL)
12272 htab->relbrlt->size = 0;
12273
12274 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12275
12276 if (info->emitrelocations
12277 && htab->glink != NULL && htab->glink->size != 0)
12278 {
12279 htab->glink->reloc_count = 1;
12280 htab->glink->flags |= SEC_RELOC;
12281 }
12282
12283 if (htab->glink_eh_frame != NULL
12284 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12285 && htab->glink_eh_frame->output_section->size != 0)
12286 {
12287 size_t size = 0, align;
12288
12289 for (stub_sec = htab->params->stub_bfd->sections;
12290 stub_sec != NULL;
12291 stub_sec = stub_sec->next)
12292 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12293 size += 20;
12294 if (htab->glink != NULL && htab->glink->size != 0)
12295 size += 24;
12296 if (size != 0)
12297 size += sizeof (glink_eh_frame_cie);
12298 align = 1;
12299 align <<= htab->glink_eh_frame->output_section->alignment_power;
12300 align -= 1;
12301 size = (size + align) & ~align;
12302 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12303 htab->glink_eh_frame->size = size;
12304 }
12305
12306 if (htab->params->plt_stub_align != 0)
12307 for (stub_sec = htab->params->stub_bfd->sections;
12308 stub_sec != NULL;
12309 stub_sec = stub_sec->next)
12310 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12311 stub_sec->size = ((stub_sec->size
12312 + (1 << htab->params->plt_stub_align) - 1)
12313 & (-1 << htab->params->plt_stub_align));
12314
12315 for (stub_sec = htab->params->stub_bfd->sections;
12316 stub_sec != NULL;
12317 stub_sec = stub_sec->next)
12318 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12319 && stub_sec->rawsize != stub_sec->size)
12320 break;
12321
12322 /* Exit from this loop when no stubs have been added, and no stubs
12323 have changed size. */
12324 if (stub_sec == NULL
12325 && (htab->glink_eh_frame == NULL
12326 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12327 break;
12328
12329 /* Ask the linker to do its stuff. */
12330 (*htab->params->layout_sections_again) ();
12331 }
12332
12333 maybe_strip_output (info, htab->brlt);
12334 if (htab->glink_eh_frame != NULL)
12335 maybe_strip_output (info, htab->glink_eh_frame);
12336
12337 return TRUE;
12338 }
12339
12340 /* Called after we have determined section placement. If sections
12341 move, we'll be called again. Provide a value for TOCstart. */
12342
12343 bfd_vma
12344 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12345 {
12346 asection *s;
12347 bfd_vma TOCstart;
12348
12349 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12350 order. The TOC starts where the first of these sections starts. */
12351 s = bfd_get_section_by_name (obfd, ".got");
12352 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12353 s = bfd_get_section_by_name (obfd, ".toc");
12354 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12355 s = bfd_get_section_by_name (obfd, ".tocbss");
12356 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12357 s = bfd_get_section_by_name (obfd, ".plt");
12358 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12359 {
12360 /* This may happen for
12361 o references to TOC base (SYM@toc / TOC[tc0]) without a
12362 .toc directive
12363 o bad linker script
12364 o --gc-sections and empty TOC sections
12365
12366 FIXME: Warn user? */
12367
12368 /* Look for a likely section. We probably won't even be
12369 using TOCstart. */
12370 for (s = obfd->sections; s != NULL; s = s->next)
12371 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12372 | SEC_EXCLUDE))
12373 == (SEC_ALLOC | SEC_SMALL_DATA))
12374 break;
12375 if (s == NULL)
12376 for (s = obfd->sections; s != NULL; s = s->next)
12377 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12378 == (SEC_ALLOC | SEC_SMALL_DATA))
12379 break;
12380 if (s == NULL)
12381 for (s = obfd->sections; s != NULL; s = s->next)
12382 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12383 == SEC_ALLOC)
12384 break;
12385 if (s == NULL)
12386 for (s = obfd->sections; s != NULL; s = s->next)
12387 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12388 break;
12389 }
12390
12391 TOCstart = 0;
12392 if (s != NULL)
12393 TOCstart = s->output_section->vma + s->output_offset;
12394
12395 _bfd_set_gp_value (obfd, TOCstart);
12396
12397 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
12398 {
12399 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12400
12401 if (htab != NULL
12402 && htab->elf.hgot != NULL)
12403 {
12404 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12405 htab->elf.hgot->root.u.def.section = s;
12406 }
12407 }
12408 return TOCstart;
12409 }
12410
12411 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12412 write out any global entry stubs. */
12413
12414 static bfd_boolean
12415 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12416 {
12417 struct bfd_link_info *info;
12418 struct ppc_link_hash_table *htab;
12419 struct plt_entry *pent;
12420 asection *s;
12421
12422 if (h->root.type == bfd_link_hash_indirect)
12423 return TRUE;
12424
12425 if (!h->pointer_equality_needed)
12426 return TRUE;
12427
12428 if (h->def_regular)
12429 return TRUE;
12430
12431 info = inf;
12432 htab = ppc_hash_table (info);
12433 if (htab == NULL)
12434 return FALSE;
12435
12436 s = htab->glink;
12437 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12438 if (pent->plt.offset != (bfd_vma) -1
12439 && pent->addend == 0)
12440 {
12441 bfd_byte *p;
12442 asection *plt;
12443 bfd_vma off;
12444
12445 p = s->contents + h->root.u.def.value;
12446 plt = htab->elf.splt;
12447 if (!htab->elf.dynamic_sections_created
12448 || h->dynindx == -1)
12449 plt = htab->elf.iplt;
12450 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12451 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12452
12453 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12454 {
12455 info->callbacks->einfo
12456 (_("%P: linkage table error against `%T'\n"),
12457 h->root.root.string);
12458 bfd_set_error (bfd_error_bad_value);
12459 htab->stub_error = TRUE;
12460 }
12461
12462 if (PPC_HA (off) != 0)
12463 {
12464 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12465 p += 4;
12466 }
12467 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12468 p += 4;
12469 bfd_put_32 (s->owner, MTCTR_R12, p);
12470 p += 4;
12471 bfd_put_32 (s->owner, BCTR, p);
12472 break;
12473 }
12474 return TRUE;
12475 }
12476
12477 /* Build all the stubs associated with the current output file.
12478 The stubs are kept in a hash table attached to the main linker
12479 hash table. This function is called via gldelf64ppc_finish. */
12480
12481 bfd_boolean
12482 ppc64_elf_build_stubs (struct bfd_link_info *info,
12483 char **stats)
12484 {
12485 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12486 asection *stub_sec;
12487 bfd_byte *p;
12488 int stub_sec_count = 0;
12489
12490 if (htab == NULL)
12491 return FALSE;
12492
12493 /* Allocate memory to hold the linker stubs. */
12494 for (stub_sec = htab->params->stub_bfd->sections;
12495 stub_sec != NULL;
12496 stub_sec = stub_sec->next)
12497 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12498 && stub_sec->size != 0)
12499 {
12500 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12501 if (stub_sec->contents == NULL)
12502 return FALSE;
12503 /* We want to check that built size is the same as calculated
12504 size. rawsize is a convenient location to use. */
12505 stub_sec->rawsize = stub_sec->size;
12506 stub_sec->size = 0;
12507 }
12508
12509 if (htab->glink != NULL && htab->glink->size != 0)
12510 {
12511 unsigned int indx;
12512 bfd_vma plt0;
12513
12514 /* Build the .glink plt call stub. */
12515 if (htab->params->emit_stub_syms)
12516 {
12517 struct elf_link_hash_entry *h;
12518 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12519 TRUE, FALSE, FALSE);
12520 if (h == NULL)
12521 return FALSE;
12522 if (h->root.type == bfd_link_hash_new)
12523 {
12524 h->root.type = bfd_link_hash_defined;
12525 h->root.u.def.section = htab->glink;
12526 h->root.u.def.value = 8;
12527 h->ref_regular = 1;
12528 h->def_regular = 1;
12529 h->ref_regular_nonweak = 1;
12530 h->forced_local = 1;
12531 h->non_elf = 0;
12532 }
12533 }
12534 plt0 = (htab->elf.splt->output_section->vma
12535 + htab->elf.splt->output_offset
12536 - 16);
12537 if (info->emitrelocations)
12538 {
12539 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12540 if (r == NULL)
12541 return FALSE;
12542 r->r_offset = (htab->glink->output_offset
12543 + htab->glink->output_section->vma);
12544 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12545 r->r_addend = plt0;
12546 }
12547 p = htab->glink->contents;
12548 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12549 bfd_put_64 (htab->glink->owner, plt0, p);
12550 p += 8;
12551 if (htab->opd_abi)
12552 {
12553 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12554 p += 4;
12555 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12556 p += 4;
12557 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12558 p += 4;
12559 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12560 p += 4;
12561 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12562 p += 4;
12563 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12564 p += 4;
12565 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12566 p += 4;
12567 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12568 p += 4;
12569 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12570 p += 4;
12571 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12572 p += 4;
12573 }
12574 else
12575 {
12576 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12577 p += 4;
12578 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12579 p += 4;
12580 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12581 p += 4;
12582 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12583 p += 4;
12584 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12585 p += 4;
12586 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12587 p += 4;
12588 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12589 p += 4;
12590 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12591 p += 4;
12592 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12593 p += 4;
12594 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12595 p += 4;
12596 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12597 p += 4;
12598 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12599 p += 4;
12600 }
12601 bfd_put_32 (htab->glink->owner, BCTR, p);
12602 p += 4;
12603 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12604 {
12605 bfd_put_32 (htab->glink->owner, NOP, p);
12606 p += 4;
12607 }
12608
12609 /* Build the .glink lazy link call stubs. */
12610 indx = 0;
12611 while (p < htab->glink->contents + htab->glink->rawsize)
12612 {
12613 if (htab->opd_abi)
12614 {
12615 if (indx < 0x8000)
12616 {
12617 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12618 p += 4;
12619 }
12620 else
12621 {
12622 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12623 p += 4;
12624 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12625 p);
12626 p += 4;
12627 }
12628 }
12629 bfd_put_32 (htab->glink->owner,
12630 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12631 indx++;
12632 p += 4;
12633 }
12634
12635 /* Build .glink global entry stubs. */
12636 if (htab->glink->size > htab->glink->rawsize)
12637 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12638 }
12639
12640 if (htab->brlt->size != 0)
12641 {
12642 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12643 htab->brlt->size);
12644 if (htab->brlt->contents == NULL)
12645 return FALSE;
12646 }
12647 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12648 {
12649 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12650 htab->relbrlt->size);
12651 if (htab->relbrlt->contents == NULL)
12652 return FALSE;
12653 }
12654
12655 if (htab->glink_eh_frame != NULL
12656 && htab->glink_eh_frame->size != 0)
12657 {
12658 bfd_vma val;
12659 bfd_byte *last_fde;
12660 size_t last_fde_len, size, align, pad;
12661
12662 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12663 if (p == NULL)
12664 return FALSE;
12665 htab->glink_eh_frame->contents = p;
12666 last_fde = p;
12667
12668 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12669
12670 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12671 /* CIE length (rewrite in case little-endian). */
12672 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12673 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12674 p += sizeof (glink_eh_frame_cie);
12675
12676 for (stub_sec = htab->params->stub_bfd->sections;
12677 stub_sec != NULL;
12678 stub_sec = stub_sec->next)
12679 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12680 {
12681 last_fde = p;
12682 last_fde_len = 16;
12683 /* FDE length. */
12684 bfd_put_32 (htab->elf.dynobj, 16, p);
12685 p += 4;
12686 /* CIE pointer. */
12687 val = p - htab->glink_eh_frame->contents;
12688 bfd_put_32 (htab->elf.dynobj, val, p);
12689 p += 4;
12690 /* Offset to stub section. */
12691 val = (stub_sec->output_section->vma
12692 + stub_sec->output_offset);
12693 val -= (htab->glink_eh_frame->output_section->vma
12694 + htab->glink_eh_frame->output_offset);
12695 val -= p - htab->glink_eh_frame->contents;
12696 if (val + 0x80000000 > 0xffffffff)
12697 {
12698 info->callbacks->einfo
12699 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12700 stub_sec->name);
12701 return FALSE;
12702 }
12703 bfd_put_32 (htab->elf.dynobj, val, p);
12704 p += 4;
12705 /* stub section size. */
12706 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12707 p += 4;
12708 /* Augmentation. */
12709 p += 1;
12710 /* Pad. */
12711 p += 3;
12712 }
12713 if (htab->glink != NULL && htab->glink->size != 0)
12714 {
12715 last_fde = p;
12716 last_fde_len = 20;
12717 /* FDE length. */
12718 bfd_put_32 (htab->elf.dynobj, 20, p);
12719 p += 4;
12720 /* CIE pointer. */
12721 val = p - htab->glink_eh_frame->contents;
12722 bfd_put_32 (htab->elf.dynobj, val, p);
12723 p += 4;
12724 /* Offset to .glink. */
12725 val = (htab->glink->output_section->vma
12726 + htab->glink->output_offset
12727 + 8);
12728 val -= (htab->glink_eh_frame->output_section->vma
12729 + htab->glink_eh_frame->output_offset);
12730 val -= p - htab->glink_eh_frame->contents;
12731 if (val + 0x80000000 > 0xffffffff)
12732 {
12733 info->callbacks->einfo
12734 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12735 htab->glink->name);
12736 return FALSE;
12737 }
12738 bfd_put_32 (htab->elf.dynobj, val, p);
12739 p += 4;
12740 /* .glink size. */
12741 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12742 p += 4;
12743 /* Augmentation. */
12744 p += 1;
12745
12746 *p++ = DW_CFA_advance_loc + 1;
12747 *p++ = DW_CFA_register;
12748 *p++ = 65;
12749 *p++ = 12;
12750 *p++ = DW_CFA_advance_loc + 4;
12751 *p++ = DW_CFA_restore_extended;
12752 *p++ = 65;
12753 }
12754 /* Subsume any padding into the last FDE if user .eh_frame
12755 sections are aligned more than glink_eh_frame. Otherwise any
12756 zero padding will be seen as a terminator. */
12757 size = p - htab->glink_eh_frame->contents;
12758 align = 1;
12759 align <<= htab->glink_eh_frame->output_section->alignment_power;
12760 align -= 1;
12761 pad = ((size + align) & ~align) - size;
12762 htab->glink_eh_frame->size = size + pad;
12763 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12764 }
12765
12766 /* Build the stubs as directed by the stub hash table. */
12767 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12768
12769 if (htab->relbrlt != NULL)
12770 htab->relbrlt->reloc_count = 0;
12771
12772 if (htab->params->plt_stub_align != 0)
12773 for (stub_sec = htab->params->stub_bfd->sections;
12774 stub_sec != NULL;
12775 stub_sec = stub_sec->next)
12776 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12777 stub_sec->size = ((stub_sec->size
12778 + (1 << htab->params->plt_stub_align) - 1)
12779 & (-1 << htab->params->plt_stub_align));
12780
12781 for (stub_sec = htab->params->stub_bfd->sections;
12782 stub_sec != NULL;
12783 stub_sec = stub_sec->next)
12784 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12785 {
12786 stub_sec_count += 1;
12787 if (stub_sec->rawsize != stub_sec->size)
12788 break;
12789 }
12790
12791 if (stub_sec != NULL
12792 || (htab->glink_eh_frame != NULL
12793 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12794 {
12795 htab->stub_error = TRUE;
12796 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12797 }
12798
12799 if (htab->stub_error)
12800 return FALSE;
12801
12802 if (stats != NULL)
12803 {
12804 *stats = bfd_malloc (500);
12805 if (*stats == NULL)
12806 return FALSE;
12807
12808 sprintf (*stats, _("linker stubs in %u group%s\n"
12809 " branch %lu\n"
12810 " toc adjust %lu\n"
12811 " long branch %lu\n"
12812 " long toc adj %lu\n"
12813 " plt call %lu\n"
12814 " plt call toc %lu"),
12815 stub_sec_count,
12816 stub_sec_count == 1 ? "" : "s",
12817 htab->stub_count[ppc_stub_long_branch - 1],
12818 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12819 htab->stub_count[ppc_stub_plt_branch - 1],
12820 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12821 htab->stub_count[ppc_stub_plt_call - 1],
12822 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12823 }
12824 return TRUE;
12825 }
12826
12827 /* This function undoes the changes made by add_symbol_adjust. */
12828
12829 static bfd_boolean
12830 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12831 {
12832 struct ppc_link_hash_entry *eh;
12833
12834 if (h->root.type == bfd_link_hash_indirect)
12835 return TRUE;
12836
12837 eh = (struct ppc_link_hash_entry *) h;
12838 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12839 return TRUE;
12840
12841 eh->elf.root.type = bfd_link_hash_undefined;
12842 return TRUE;
12843 }
12844
12845 void
12846 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12847 {
12848 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12849
12850 if (htab != NULL)
12851 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12852 }
12853
12854 /* What to do when ld finds relocations against symbols defined in
12855 discarded sections. */
12856
12857 static unsigned int
12858 ppc64_elf_action_discarded (asection *sec)
12859 {
12860 if (strcmp (".opd", sec->name) == 0)
12861 return 0;
12862
12863 if (strcmp (".toc", sec->name) == 0)
12864 return 0;
12865
12866 if (strcmp (".toc1", sec->name) == 0)
12867 return 0;
12868
12869 return _bfd_elf_default_action_discarded (sec);
12870 }
12871
12872 /* The RELOCATE_SECTION function is called by the ELF backend linker
12873 to handle the relocations for a section.
12874
12875 The relocs are always passed as Rela structures; if the section
12876 actually uses Rel structures, the r_addend field will always be
12877 zero.
12878
12879 This function is responsible for adjust the section contents as
12880 necessary, and (if using Rela relocs and generating a
12881 relocatable output file) adjusting the reloc addend as
12882 necessary.
12883
12884 This function does not have to worry about setting the reloc
12885 address or the reloc symbol index.
12886
12887 LOCAL_SYMS is a pointer to the swapped in local symbols.
12888
12889 LOCAL_SECTIONS is an array giving the section in the input file
12890 corresponding to the st_shndx field of each local symbol.
12891
12892 The global hash table entry for the global symbols can be found
12893 via elf_sym_hashes (input_bfd).
12894
12895 When generating relocatable output, this function must handle
12896 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12897 going to be the section symbol corresponding to the output
12898 section, which means that the addend must be adjusted
12899 accordingly. */
12900
12901 static bfd_boolean
12902 ppc64_elf_relocate_section (bfd *output_bfd,
12903 struct bfd_link_info *info,
12904 bfd *input_bfd,
12905 asection *input_section,
12906 bfd_byte *contents,
12907 Elf_Internal_Rela *relocs,
12908 Elf_Internal_Sym *local_syms,
12909 asection **local_sections)
12910 {
12911 struct ppc_link_hash_table *htab;
12912 Elf_Internal_Shdr *symtab_hdr;
12913 struct elf_link_hash_entry **sym_hashes;
12914 Elf_Internal_Rela *rel;
12915 Elf_Internal_Rela *relend;
12916 Elf_Internal_Rela outrel;
12917 bfd_byte *loc;
12918 struct got_entry **local_got_ents;
12919 bfd_vma TOCstart;
12920 bfd_boolean ret = TRUE;
12921 bfd_boolean is_opd;
12922 /* Assume 'at' branch hints. */
12923 bfd_boolean is_isa_v2 = TRUE;
12924 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12925
12926 /* Initialize howto table if needed. */
12927 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12928 ppc_howto_init ();
12929
12930 htab = ppc_hash_table (info);
12931 if (htab == NULL)
12932 return FALSE;
12933
12934 /* Don't relocate stub sections. */
12935 if (input_section->owner == htab->params->stub_bfd)
12936 return TRUE;
12937
12938 BFD_ASSERT (is_ppc64_elf (input_bfd));
12939
12940 local_got_ents = elf_local_got_ents (input_bfd);
12941 TOCstart = elf_gp (output_bfd);
12942 symtab_hdr = &elf_symtab_hdr (input_bfd);
12943 sym_hashes = elf_sym_hashes (input_bfd);
12944 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12945
12946 rel = relocs;
12947 relend = relocs + input_section->reloc_count;
12948 for (; rel < relend; rel++)
12949 {
12950 enum elf_ppc64_reloc_type r_type;
12951 bfd_vma addend;
12952 bfd_reloc_status_type r;
12953 Elf_Internal_Sym *sym;
12954 asection *sec;
12955 struct elf_link_hash_entry *h_elf;
12956 struct ppc_link_hash_entry *h;
12957 struct ppc_link_hash_entry *fdh;
12958 const char *sym_name;
12959 unsigned long r_symndx, toc_symndx;
12960 bfd_vma toc_addend;
12961 unsigned char tls_mask, tls_gd, tls_type;
12962 unsigned char sym_type;
12963 bfd_vma relocation;
12964 bfd_boolean unresolved_reloc;
12965 bfd_boolean warned;
12966 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12967 unsigned int insn;
12968 unsigned int mask;
12969 struct ppc_stub_hash_entry *stub_entry;
12970 bfd_vma max_br_offset;
12971 bfd_vma from;
12972 const Elf_Internal_Rela orig_rel = *rel;
12973 reloc_howto_type *howto;
12974 struct reloc_howto_struct alt_howto;
12975
12976 r_type = ELF64_R_TYPE (rel->r_info);
12977 r_symndx = ELF64_R_SYM (rel->r_info);
12978
12979 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12980 symbol of the previous ADDR64 reloc. The symbol gives us the
12981 proper TOC base to use. */
12982 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12983 && rel != relocs
12984 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12985 && is_opd)
12986 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12987
12988 sym = NULL;
12989 sec = NULL;
12990 h_elf = NULL;
12991 sym_name = NULL;
12992 unresolved_reloc = FALSE;
12993 warned = FALSE;
12994
12995 if (r_symndx < symtab_hdr->sh_info)
12996 {
12997 /* It's a local symbol. */
12998 struct _opd_sec_data *opd;
12999
13000 sym = local_syms + r_symndx;
13001 sec = local_sections[r_symndx];
13002 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13003 sym_type = ELF64_ST_TYPE (sym->st_info);
13004 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13005 opd = get_opd_info (sec);
13006 if (opd != NULL && opd->adjust != NULL)
13007 {
13008 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
13009 if (adjust == -1)
13010 relocation = 0;
13011 else
13012 {
13013 /* If this is a relocation against the opd section sym
13014 and we have edited .opd, adjust the reloc addend so
13015 that ld -r and ld --emit-relocs output is correct.
13016 If it is a reloc against some other .opd symbol,
13017 then the symbol value will be adjusted later. */
13018 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13019 rel->r_addend += adjust;
13020 else
13021 relocation += adjust;
13022 }
13023 }
13024 }
13025 else
13026 {
13027 bfd_boolean ignored;
13028
13029 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13030 r_symndx, symtab_hdr, sym_hashes,
13031 h_elf, sec, relocation,
13032 unresolved_reloc, warned, ignored);
13033 sym_name = h_elf->root.root.string;
13034 sym_type = h_elf->type;
13035 if (sec != NULL
13036 && sec->owner == output_bfd
13037 && strcmp (sec->name, ".opd") == 0)
13038 {
13039 /* This is a symbol defined in a linker script. All
13040 such are defined in output sections, even those
13041 defined by simple assignment from a symbol defined in
13042 an input section. Transfer the symbol to an
13043 appropriate input .opd section, so that a branch to
13044 this symbol will be mapped to the location specified
13045 by the opd entry. */
13046 struct bfd_link_order *lo;
13047 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13048 if (lo->type == bfd_indirect_link_order)
13049 {
13050 asection *isec = lo->u.indirect.section;
13051 if (h_elf->root.u.def.value >= isec->output_offset
13052 && h_elf->root.u.def.value < (isec->output_offset
13053 + isec->size))
13054 {
13055 h_elf->root.u.def.value -= isec->output_offset;
13056 h_elf->root.u.def.section = isec;
13057 sec = isec;
13058 break;
13059 }
13060 }
13061 }
13062 }
13063 h = (struct ppc_link_hash_entry *) h_elf;
13064
13065 if (sec != NULL && discarded_section (sec))
13066 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13067 rel, 1, relend,
13068 ppc64_elf_howto_table[r_type], 0,
13069 contents);
13070
13071 if (info->relocatable)
13072 continue;
13073
13074 if (h != NULL && &h->elf == htab->elf.hgot)
13075 {
13076 relocation = (TOCstart
13077 + htab->stub_group[input_section->id].toc_off);
13078 sec = bfd_abs_section_ptr;
13079 unresolved_reloc = FALSE;
13080 }
13081
13082 /* TLS optimizations. Replace instruction sequences and relocs
13083 based on information we collected in tls_optimize. We edit
13084 RELOCS so that --emit-relocs will output something sensible
13085 for the final instruction stream. */
13086 tls_mask = 0;
13087 tls_gd = 0;
13088 toc_symndx = 0;
13089 if (h != NULL)
13090 tls_mask = h->tls_mask;
13091 else if (local_got_ents != NULL)
13092 {
13093 struct plt_entry **local_plt = (struct plt_entry **)
13094 (local_got_ents + symtab_hdr->sh_info);
13095 unsigned char *lgot_masks = (unsigned char *)
13096 (local_plt + symtab_hdr->sh_info);
13097 tls_mask = lgot_masks[r_symndx];
13098 }
13099 if (tls_mask == 0
13100 && (r_type == R_PPC64_TLS
13101 || r_type == R_PPC64_TLSGD
13102 || r_type == R_PPC64_TLSLD))
13103 {
13104 /* Check for toc tls entries. */
13105 unsigned char *toc_tls;
13106
13107 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13108 &local_syms, rel, input_bfd))
13109 return FALSE;
13110
13111 if (toc_tls)
13112 tls_mask = *toc_tls;
13113 }
13114
13115 /* Check that tls relocs are used with tls syms, and non-tls
13116 relocs are used with non-tls syms. */
13117 if (r_symndx != STN_UNDEF
13118 && r_type != R_PPC64_NONE
13119 && (h == NULL
13120 || h->elf.root.type == bfd_link_hash_defined
13121 || h->elf.root.type == bfd_link_hash_defweak)
13122 && (IS_PPC64_TLS_RELOC (r_type)
13123 != (sym_type == STT_TLS
13124 || (sym_type == STT_SECTION
13125 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13126 {
13127 if (tls_mask != 0
13128 && (r_type == R_PPC64_TLS
13129 || r_type == R_PPC64_TLSGD
13130 || r_type == R_PPC64_TLSLD))
13131 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13132 ;
13133 else
13134 info->callbacks->einfo
13135 (!IS_PPC64_TLS_RELOC (r_type)
13136 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13137 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13138 input_bfd, input_section, rel->r_offset,
13139 ppc64_elf_howto_table[r_type]->name,
13140 sym_name);
13141 }
13142
13143 /* Ensure reloc mapping code below stays sane. */
13144 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13145 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13146 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13147 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13148 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13149 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13150 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13151 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13152 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13153 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13154 abort ();
13155
13156 switch (r_type)
13157 {
13158 default:
13159 break;
13160
13161 case R_PPC64_LO_DS_OPT:
13162 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13163 if ((insn & (0x3f << 26)) != 58u << 26)
13164 abort ();
13165 insn += (14u << 26) - (58u << 26);
13166 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13167 r_type = R_PPC64_TOC16_LO;
13168 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13169 break;
13170
13171 case R_PPC64_TOC16:
13172 case R_PPC64_TOC16_LO:
13173 case R_PPC64_TOC16_DS:
13174 case R_PPC64_TOC16_LO_DS:
13175 {
13176 /* Check for toc tls entries. */
13177 unsigned char *toc_tls;
13178 int retval;
13179
13180 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13181 &local_syms, rel, input_bfd);
13182 if (retval == 0)
13183 return FALSE;
13184
13185 if (toc_tls)
13186 {
13187 tls_mask = *toc_tls;
13188 if (r_type == R_PPC64_TOC16_DS
13189 || r_type == R_PPC64_TOC16_LO_DS)
13190 {
13191 if (tls_mask != 0
13192 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13193 goto toctprel;
13194 }
13195 else
13196 {
13197 /* If we found a GD reloc pair, then we might be
13198 doing a GD->IE transition. */
13199 if (retval == 2)
13200 {
13201 tls_gd = TLS_TPRELGD;
13202 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13203 goto tls_ldgd_opt;
13204 }
13205 else if (retval == 3)
13206 {
13207 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13208 goto tls_ldgd_opt;
13209 }
13210 }
13211 }
13212 }
13213 break;
13214
13215 case R_PPC64_GOT_TPREL16_HI:
13216 case R_PPC64_GOT_TPREL16_HA:
13217 if (tls_mask != 0
13218 && (tls_mask & TLS_TPREL) == 0)
13219 {
13220 rel->r_offset -= d_offset;
13221 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13222 r_type = R_PPC64_NONE;
13223 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13224 }
13225 break;
13226
13227 case R_PPC64_GOT_TPREL16_DS:
13228 case R_PPC64_GOT_TPREL16_LO_DS:
13229 if (tls_mask != 0
13230 && (tls_mask & TLS_TPREL) == 0)
13231 {
13232 toctprel:
13233 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13234 insn &= 31 << 21;
13235 insn |= 0x3c0d0000; /* addis 0,13,0 */
13236 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13237 r_type = R_PPC64_TPREL16_HA;
13238 if (toc_symndx != 0)
13239 {
13240 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13241 rel->r_addend = toc_addend;
13242 /* We changed the symbol. Start over in order to
13243 get h, sym, sec etc. right. */
13244 rel--;
13245 continue;
13246 }
13247 else
13248 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13249 }
13250 break;
13251
13252 case R_PPC64_TLS:
13253 if (tls_mask != 0
13254 && (tls_mask & TLS_TPREL) == 0)
13255 {
13256 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13257 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13258 if (insn == 0)
13259 abort ();
13260 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13261 /* Was PPC64_TLS which sits on insn boundary, now
13262 PPC64_TPREL16_LO which is at low-order half-word. */
13263 rel->r_offset += d_offset;
13264 r_type = R_PPC64_TPREL16_LO;
13265 if (toc_symndx != 0)
13266 {
13267 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13268 rel->r_addend = toc_addend;
13269 /* We changed the symbol. Start over in order to
13270 get h, sym, sec etc. right. */
13271 rel--;
13272 continue;
13273 }
13274 else
13275 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13276 }
13277 break;
13278
13279 case R_PPC64_GOT_TLSGD16_HI:
13280 case R_PPC64_GOT_TLSGD16_HA:
13281 tls_gd = TLS_TPRELGD;
13282 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13283 goto tls_gdld_hi;
13284 break;
13285
13286 case R_PPC64_GOT_TLSLD16_HI:
13287 case R_PPC64_GOT_TLSLD16_HA:
13288 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13289 {
13290 tls_gdld_hi:
13291 if ((tls_mask & tls_gd) != 0)
13292 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13293 + R_PPC64_GOT_TPREL16_DS);
13294 else
13295 {
13296 rel->r_offset -= d_offset;
13297 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13298 r_type = R_PPC64_NONE;
13299 }
13300 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13301 }
13302 break;
13303
13304 case R_PPC64_GOT_TLSGD16:
13305 case R_PPC64_GOT_TLSGD16_LO:
13306 tls_gd = TLS_TPRELGD;
13307 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13308 goto tls_ldgd_opt;
13309 break;
13310
13311 case R_PPC64_GOT_TLSLD16:
13312 case R_PPC64_GOT_TLSLD16_LO:
13313 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13314 {
13315 unsigned int insn1, insn2, insn3;
13316 bfd_vma offset;
13317
13318 tls_ldgd_opt:
13319 offset = (bfd_vma) -1;
13320 /* If not using the newer R_PPC64_TLSGD/LD to mark
13321 __tls_get_addr calls, we must trust that the call
13322 stays with its arg setup insns, ie. that the next
13323 reloc is the __tls_get_addr call associated with
13324 the current reloc. Edit both insns. */
13325 if (input_section->has_tls_get_addr_call
13326 && rel + 1 < relend
13327 && branch_reloc_hash_match (input_bfd, rel + 1,
13328 htab->tls_get_addr,
13329 htab->tls_get_addr_fd))
13330 offset = rel[1].r_offset;
13331 if ((tls_mask & tls_gd) != 0)
13332 {
13333 /* IE */
13334 insn1 = bfd_get_32 (output_bfd,
13335 contents + rel->r_offset - d_offset);
13336 insn1 &= (1 << 26) - (1 << 2);
13337 insn1 |= 58 << 26; /* ld */
13338 insn2 = 0x7c636a14; /* add 3,3,13 */
13339 if (offset != (bfd_vma) -1)
13340 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13341 if ((tls_mask & TLS_EXPLICIT) == 0)
13342 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13343 + R_PPC64_GOT_TPREL16_DS);
13344 else
13345 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13346 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13347 }
13348 else
13349 {
13350 /* LE */
13351 insn1 = 0x3c6d0000; /* addis 3,13,0 */
13352 insn2 = 0x38630000; /* addi 3,3,0 */
13353 if (tls_gd == 0)
13354 {
13355 /* Was an LD reloc. */
13356 if (toc_symndx)
13357 sec = local_sections[toc_symndx];
13358 for (r_symndx = 0;
13359 r_symndx < symtab_hdr->sh_info;
13360 r_symndx++)
13361 if (local_sections[r_symndx] == sec)
13362 break;
13363 if (r_symndx >= symtab_hdr->sh_info)
13364 r_symndx = STN_UNDEF;
13365 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13366 if (r_symndx != STN_UNDEF)
13367 rel->r_addend -= (local_syms[r_symndx].st_value
13368 + sec->output_offset
13369 + sec->output_section->vma);
13370 }
13371 else if (toc_symndx != 0)
13372 {
13373 r_symndx = toc_symndx;
13374 rel->r_addend = toc_addend;
13375 }
13376 r_type = R_PPC64_TPREL16_HA;
13377 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13378 if (offset != (bfd_vma) -1)
13379 {
13380 rel[1].r_info = ELF64_R_INFO (r_symndx,
13381 R_PPC64_TPREL16_LO);
13382 rel[1].r_offset = offset + d_offset;
13383 rel[1].r_addend = rel->r_addend;
13384 }
13385 }
13386 bfd_put_32 (output_bfd, insn1,
13387 contents + rel->r_offset - d_offset);
13388 if (offset != (bfd_vma) -1)
13389 {
13390 insn3 = bfd_get_32 (output_bfd,
13391 contents + offset + 4);
13392 if (insn3 == NOP
13393 || insn3 == CROR_151515 || insn3 == CROR_313131)
13394 {
13395 rel[1].r_offset += 4;
13396 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13397 insn2 = NOP;
13398 }
13399 bfd_put_32 (output_bfd, insn2, contents + offset);
13400 }
13401 if ((tls_mask & tls_gd) == 0
13402 && (tls_gd == 0 || toc_symndx != 0))
13403 {
13404 /* We changed the symbol. Start over in order
13405 to get h, sym, sec etc. right. */
13406 rel--;
13407 continue;
13408 }
13409 }
13410 break;
13411
13412 case R_PPC64_TLSGD:
13413 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13414 {
13415 unsigned int insn2, insn3;
13416 bfd_vma offset = rel->r_offset;
13417
13418 if ((tls_mask & TLS_TPRELGD) != 0)
13419 {
13420 /* IE */
13421 r_type = R_PPC64_NONE;
13422 insn2 = 0x7c636a14; /* add 3,3,13 */
13423 }
13424 else
13425 {
13426 /* LE */
13427 if (toc_symndx != 0)
13428 {
13429 r_symndx = toc_symndx;
13430 rel->r_addend = toc_addend;
13431 }
13432 r_type = R_PPC64_TPREL16_LO;
13433 rel->r_offset = offset + d_offset;
13434 insn2 = 0x38630000; /* addi 3,3,0 */
13435 }
13436 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13437 /* Zap the reloc on the _tls_get_addr call too. */
13438 BFD_ASSERT (offset == rel[1].r_offset);
13439 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13440 insn3 = bfd_get_32 (output_bfd,
13441 contents + offset + 4);
13442 if (insn3 == NOP
13443 || insn3 == CROR_151515 || insn3 == CROR_313131)
13444 {
13445 rel->r_offset += 4;
13446 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13447 insn2 = NOP;
13448 }
13449 bfd_put_32 (output_bfd, insn2, contents + offset);
13450 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13451 {
13452 rel--;
13453 continue;
13454 }
13455 }
13456 break;
13457
13458 case R_PPC64_TLSLD:
13459 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13460 {
13461 unsigned int insn2, insn3;
13462 bfd_vma offset = rel->r_offset;
13463
13464 if (toc_symndx)
13465 sec = local_sections[toc_symndx];
13466 for (r_symndx = 0;
13467 r_symndx < symtab_hdr->sh_info;
13468 r_symndx++)
13469 if (local_sections[r_symndx] == sec)
13470 break;
13471 if (r_symndx >= symtab_hdr->sh_info)
13472 r_symndx = STN_UNDEF;
13473 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13474 if (r_symndx != STN_UNDEF)
13475 rel->r_addend -= (local_syms[r_symndx].st_value
13476 + sec->output_offset
13477 + sec->output_section->vma);
13478
13479 r_type = R_PPC64_TPREL16_LO;
13480 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13481 rel->r_offset = offset + d_offset;
13482 /* Zap the reloc on the _tls_get_addr call too. */
13483 BFD_ASSERT (offset == rel[1].r_offset);
13484 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13485 insn2 = 0x38630000; /* addi 3,3,0 */
13486 insn3 = bfd_get_32 (output_bfd,
13487 contents + offset + 4);
13488 if (insn3 == NOP
13489 || insn3 == CROR_151515 || insn3 == CROR_313131)
13490 {
13491 rel->r_offset += 4;
13492 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13493 insn2 = NOP;
13494 }
13495 bfd_put_32 (output_bfd, insn2, contents + offset);
13496 rel--;
13497 continue;
13498 }
13499 break;
13500
13501 case R_PPC64_DTPMOD64:
13502 if (rel + 1 < relend
13503 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13504 && rel[1].r_offset == rel->r_offset + 8)
13505 {
13506 if ((tls_mask & TLS_GD) == 0)
13507 {
13508 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13509 if ((tls_mask & TLS_TPRELGD) != 0)
13510 r_type = R_PPC64_TPREL64;
13511 else
13512 {
13513 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13514 r_type = R_PPC64_NONE;
13515 }
13516 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13517 }
13518 }
13519 else
13520 {
13521 if ((tls_mask & TLS_LD) == 0)
13522 {
13523 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13524 r_type = R_PPC64_NONE;
13525 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13526 }
13527 }
13528 break;
13529
13530 case R_PPC64_TPREL64:
13531 if ((tls_mask & TLS_TPREL) == 0)
13532 {
13533 r_type = R_PPC64_NONE;
13534 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13535 }
13536 break;
13537
13538 case R_PPC64_REL16_HA:
13539 /* If we are generating a non-PIC executable, edit
13540 . 0: addis 2,12,.TOC.-0b@ha
13541 . addi 2,2,.TOC.-0b@l
13542 used by ELFv2 global entry points to set up r2, to
13543 . lis 2,.TOC.@ha
13544 . addi 2,2,.TOC.@l
13545 if .TOC. is in range. */
13546 if (!info->shared
13547 && h != NULL && &h->elf == htab->elf.hgot
13548 && rel + 1 < relend
13549 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13550 && rel[1].r_offset == rel->r_offset + 4
13551 && rel[1].r_addend == rel->r_addend + 4
13552 && relocation + 0x80008000 <= 0xffffffff)
13553 {
13554 unsigned int insn1, insn2;
13555 bfd_vma offset = rel->r_offset - d_offset;
13556 insn1 = bfd_get_32 (output_bfd, contents + offset);
13557 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13558 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13559 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13560 {
13561 r_type = R_PPC64_ADDR16_HA;
13562 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13563 rel->r_addend -= d_offset;
13564 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13565 rel[1].r_addend -= d_offset + 4;
13566 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13567 }
13568 }
13569 break;
13570 }
13571
13572 /* Handle other relocations that tweak non-addend part of insn. */
13573 insn = 0;
13574 max_br_offset = 1 << 25;
13575 addend = rel->r_addend;
13576 reloc_dest = DEST_NORMAL;
13577 switch (r_type)
13578 {
13579 default:
13580 break;
13581
13582 case R_PPC64_TOCSAVE:
13583 if (relocation + addend == (rel->r_offset
13584 + input_section->output_offset
13585 + input_section->output_section->vma)
13586 && tocsave_find (htab, NO_INSERT,
13587 &local_syms, rel, input_bfd))
13588 {
13589 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13590 if (insn == NOP
13591 || insn == CROR_151515 || insn == CROR_313131)
13592 bfd_put_32 (input_bfd,
13593 STD_R2_0R1 + STK_TOC (htab),
13594 contents + rel->r_offset);
13595 }
13596 break;
13597
13598 /* Branch taken prediction relocations. */
13599 case R_PPC64_ADDR14_BRTAKEN:
13600 case R_PPC64_REL14_BRTAKEN:
13601 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13602 /* Fall thru. */
13603
13604 /* Branch not taken prediction relocations. */
13605 case R_PPC64_ADDR14_BRNTAKEN:
13606 case R_PPC64_REL14_BRNTAKEN:
13607 insn |= bfd_get_32 (output_bfd,
13608 contents + rel->r_offset) & ~(0x01 << 21);
13609 /* Fall thru. */
13610
13611 case R_PPC64_REL14:
13612 max_br_offset = 1 << 15;
13613 /* Fall thru. */
13614
13615 case R_PPC64_REL24:
13616 /* Calls to functions with a different TOC, such as calls to
13617 shared objects, need to alter the TOC pointer. This is
13618 done using a linkage stub. A REL24 branching to these
13619 linkage stubs needs to be followed by a nop, as the nop
13620 will be replaced with an instruction to restore the TOC
13621 base pointer. */
13622 fdh = h;
13623 if (h != NULL
13624 && h->oh != NULL
13625 && h->oh->is_func_descriptor)
13626 fdh = ppc_follow_link (h->oh);
13627 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13628 htab);
13629 if (stub_entry != NULL
13630 && (stub_entry->stub_type == ppc_stub_plt_call
13631 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13632 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13633 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13634 {
13635 bfd_boolean can_plt_call = FALSE;
13636
13637 /* All of these stubs will modify r2, so there must be a
13638 branch and link followed by a nop. The nop is
13639 replaced by an insn to restore r2. */
13640 if (rel->r_offset + 8 <= input_section->size)
13641 {
13642 unsigned long br;
13643
13644 br = bfd_get_32 (input_bfd,
13645 contents + rel->r_offset);
13646 if ((br & 1) != 0)
13647 {
13648 unsigned long nop;
13649
13650 nop = bfd_get_32 (input_bfd,
13651 contents + rel->r_offset + 4);
13652 if (nop == NOP
13653 || nop == CROR_151515 || nop == CROR_313131)
13654 {
13655 if (h != NULL
13656 && (h == htab->tls_get_addr_fd
13657 || h == htab->tls_get_addr)
13658 && !htab->params->no_tls_get_addr_opt)
13659 {
13660 /* Special stub used, leave nop alone. */
13661 }
13662 else
13663 bfd_put_32 (input_bfd,
13664 LD_R2_0R1 + STK_TOC (htab),
13665 contents + rel->r_offset + 4);
13666 can_plt_call = TRUE;
13667 }
13668 }
13669 }
13670
13671 if (!can_plt_call && h != NULL)
13672 {
13673 const char *name = h->elf.root.root.string;
13674
13675 if (*name == '.')
13676 ++name;
13677
13678 if (strncmp (name, "__libc_start_main", 17) == 0
13679 && (name[17] == 0 || name[17] == '@'))
13680 {
13681 /* Allow crt1 branch to go via a toc adjusting
13682 stub. Other calls that never return could do
13683 the same, if we could detect such. */
13684 can_plt_call = TRUE;
13685 }
13686 }
13687
13688 if (!can_plt_call)
13689 {
13690 /* g++ as of 20130507 emits self-calls without a
13691 following nop. This is arguably wrong since we
13692 have conflicting information. On the one hand a
13693 global symbol and on the other a local call
13694 sequence, but don't error for this special case.
13695 It isn't possible to cheaply verify we have
13696 exactly such a call. Allow all calls to the same
13697 section. */
13698 asection *code_sec = sec;
13699
13700 if (get_opd_info (sec) != NULL)
13701 {
13702 bfd_vma off = (relocation + addend
13703 - sec->output_section->vma
13704 - sec->output_offset);
13705
13706 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13707 }
13708 if (code_sec == input_section)
13709 can_plt_call = TRUE;
13710 }
13711
13712 if (!can_plt_call)
13713 {
13714 info->callbacks->einfo
13715 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13716 "recompile with -fPIC\n"),
13717 input_bfd, input_section, rel->r_offset, sym_name);
13718
13719 bfd_set_error (bfd_error_bad_value);
13720 ret = FALSE;
13721 }
13722
13723 if (can_plt_call
13724 && (stub_entry->stub_type == ppc_stub_plt_call
13725 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13726 unresolved_reloc = FALSE;
13727 }
13728
13729 if ((stub_entry == NULL
13730 || stub_entry->stub_type == ppc_stub_long_branch
13731 || stub_entry->stub_type == ppc_stub_plt_branch)
13732 && get_opd_info (sec) != NULL)
13733 {
13734 /* The branch destination is the value of the opd entry. */
13735 bfd_vma off = (relocation + addend
13736 - sec->output_section->vma
13737 - sec->output_offset);
13738 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13739 if (dest != (bfd_vma) -1)
13740 {
13741 relocation = dest;
13742 addend = 0;
13743 reloc_dest = DEST_OPD;
13744 }
13745 }
13746
13747 /* If the branch is out of reach we ought to have a long
13748 branch stub. */
13749 from = (rel->r_offset
13750 + input_section->output_offset
13751 + input_section->output_section->vma);
13752
13753 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13754 ? fdh->elf.other
13755 : sym->st_other);
13756
13757 if (stub_entry != NULL
13758 && (stub_entry->stub_type == ppc_stub_long_branch
13759 || stub_entry->stub_type == ppc_stub_plt_branch)
13760 && (r_type == R_PPC64_ADDR14_BRTAKEN
13761 || r_type == R_PPC64_ADDR14_BRNTAKEN
13762 || (relocation + addend - from + max_br_offset
13763 < 2 * max_br_offset)))
13764 /* Don't use the stub if this branch is in range. */
13765 stub_entry = NULL;
13766
13767 if (stub_entry != NULL)
13768 {
13769 /* Munge up the value and addend so that we call the stub
13770 rather than the procedure directly. */
13771 relocation = (stub_entry->stub_offset
13772 + stub_entry->stub_sec->output_offset
13773 + stub_entry->stub_sec->output_section->vma);
13774 addend = 0;
13775 reloc_dest = DEST_STUB;
13776
13777 if ((stub_entry->stub_type == ppc_stub_plt_call
13778 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13779 && (ALWAYS_EMIT_R2SAVE
13780 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13781 && rel + 1 < relend
13782 && rel[1].r_offset == rel->r_offset + 4
13783 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13784 relocation += 4;
13785 }
13786
13787 if (insn != 0)
13788 {
13789 if (is_isa_v2)
13790 {
13791 /* Set 'a' bit. This is 0b00010 in BO field for branch
13792 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13793 for branch on CTR insns (BO == 1a00t or 1a01t). */
13794 if ((insn & (0x14 << 21)) == (0x04 << 21))
13795 insn |= 0x02 << 21;
13796 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13797 insn |= 0x08 << 21;
13798 else
13799 break;
13800 }
13801 else
13802 {
13803 /* Invert 'y' bit if not the default. */
13804 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13805 insn ^= 0x01 << 21;
13806 }
13807
13808 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13809 }
13810
13811 /* NOP out calls to undefined weak functions.
13812 We can thus call a weak function without first
13813 checking whether the function is defined. */
13814 else if (h != NULL
13815 && h->elf.root.type == bfd_link_hash_undefweak
13816 && h->elf.dynindx == -1
13817 && r_type == R_PPC64_REL24
13818 && relocation == 0
13819 && addend == 0)
13820 {
13821 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13822 continue;
13823 }
13824 break;
13825 }
13826
13827 /* Set `addend'. */
13828 tls_type = 0;
13829 switch (r_type)
13830 {
13831 default:
13832 info->callbacks->einfo
13833 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13834 input_bfd, (int) r_type, sym_name);
13835
13836 bfd_set_error (bfd_error_bad_value);
13837 ret = FALSE;
13838 continue;
13839
13840 case R_PPC64_NONE:
13841 case R_PPC64_TLS:
13842 case R_PPC64_TLSGD:
13843 case R_PPC64_TLSLD:
13844 case R_PPC64_TOCSAVE:
13845 case R_PPC64_GNU_VTINHERIT:
13846 case R_PPC64_GNU_VTENTRY:
13847 continue;
13848
13849 /* GOT16 relocations. Like an ADDR16 using the symbol's
13850 address in the GOT as relocation value instead of the
13851 symbol's value itself. Also, create a GOT entry for the
13852 symbol and put the symbol value there. */
13853 case R_PPC64_GOT_TLSGD16:
13854 case R_PPC64_GOT_TLSGD16_LO:
13855 case R_PPC64_GOT_TLSGD16_HI:
13856 case R_PPC64_GOT_TLSGD16_HA:
13857 tls_type = TLS_TLS | TLS_GD;
13858 goto dogot;
13859
13860 case R_PPC64_GOT_TLSLD16:
13861 case R_PPC64_GOT_TLSLD16_LO:
13862 case R_PPC64_GOT_TLSLD16_HI:
13863 case R_PPC64_GOT_TLSLD16_HA:
13864 tls_type = TLS_TLS | TLS_LD;
13865 goto dogot;
13866
13867 case R_PPC64_GOT_TPREL16_DS:
13868 case R_PPC64_GOT_TPREL16_LO_DS:
13869 case R_PPC64_GOT_TPREL16_HI:
13870 case R_PPC64_GOT_TPREL16_HA:
13871 tls_type = TLS_TLS | TLS_TPREL;
13872 goto dogot;
13873
13874 case R_PPC64_GOT_DTPREL16_DS:
13875 case R_PPC64_GOT_DTPREL16_LO_DS:
13876 case R_PPC64_GOT_DTPREL16_HI:
13877 case R_PPC64_GOT_DTPREL16_HA:
13878 tls_type = TLS_TLS | TLS_DTPREL;
13879 goto dogot;
13880
13881 case R_PPC64_GOT16:
13882 case R_PPC64_GOT16_LO:
13883 case R_PPC64_GOT16_HI:
13884 case R_PPC64_GOT16_HA:
13885 case R_PPC64_GOT16_DS:
13886 case R_PPC64_GOT16_LO_DS:
13887 dogot:
13888 {
13889 /* Relocation is to the entry for this symbol in the global
13890 offset table. */
13891 asection *got;
13892 bfd_vma *offp;
13893 bfd_vma off;
13894 unsigned long indx = 0;
13895 struct got_entry *ent;
13896
13897 if (tls_type == (TLS_TLS | TLS_LD)
13898 && (h == NULL
13899 || !h->elf.def_dynamic))
13900 ent = ppc64_tlsld_got (input_bfd);
13901 else
13902 {
13903
13904 if (h != NULL)
13905 {
13906 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13907 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13908 &h->elf)
13909 || (info->shared
13910 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
13911 /* This is actually a static link, or it is a
13912 -Bsymbolic link and the symbol is defined
13913 locally, or the symbol was forced to be local
13914 because of a version file. */
13915 ;
13916 else
13917 {
13918 BFD_ASSERT (h->elf.dynindx != -1);
13919 indx = h->elf.dynindx;
13920 unresolved_reloc = FALSE;
13921 }
13922 ent = h->elf.got.glist;
13923 }
13924 else
13925 {
13926 if (local_got_ents == NULL)
13927 abort ();
13928 ent = local_got_ents[r_symndx];
13929 }
13930
13931 for (; ent != NULL; ent = ent->next)
13932 if (ent->addend == orig_rel.r_addend
13933 && ent->owner == input_bfd
13934 && ent->tls_type == tls_type)
13935 break;
13936 }
13937
13938 if (ent == NULL)
13939 abort ();
13940 if (ent->is_indirect)
13941 ent = ent->got.ent;
13942 offp = &ent->got.offset;
13943 got = ppc64_elf_tdata (ent->owner)->got;
13944 if (got == NULL)
13945 abort ();
13946
13947 /* The offset must always be a multiple of 8. We use the
13948 least significant bit to record whether we have already
13949 processed this entry. */
13950 off = *offp;
13951 if ((off & 1) != 0)
13952 off &= ~1;
13953 else
13954 {
13955 /* Generate relocs for the dynamic linker, except in
13956 the case of TLSLD where we'll use one entry per
13957 module. */
13958 asection *relgot;
13959 bfd_boolean ifunc;
13960
13961 *offp = off | 1;
13962 relgot = NULL;
13963 ifunc = (h != NULL
13964 ? h->elf.type == STT_GNU_IFUNC
13965 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13966 if (ifunc)
13967 relgot = htab->elf.irelplt;
13968 else if ((info->shared || indx != 0)
13969 && (h == NULL
13970 || (tls_type == (TLS_TLS | TLS_LD)
13971 && !h->elf.def_dynamic)
13972 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13973 || h->elf.root.type != bfd_link_hash_undefweak))
13974 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13975 if (relgot != NULL)
13976 {
13977 outrel.r_offset = (got->output_section->vma
13978 + got->output_offset
13979 + off);
13980 outrel.r_addend = addend;
13981 if (tls_type & (TLS_LD | TLS_GD))
13982 {
13983 outrel.r_addend = 0;
13984 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13985 if (tls_type == (TLS_TLS | TLS_GD))
13986 {
13987 loc = relgot->contents;
13988 loc += (relgot->reloc_count++
13989 * sizeof (Elf64_External_Rela));
13990 bfd_elf64_swap_reloca_out (output_bfd,
13991 &outrel, loc);
13992 outrel.r_offset += 8;
13993 outrel.r_addend = addend;
13994 outrel.r_info
13995 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13996 }
13997 }
13998 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13999 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14000 else if (tls_type == (TLS_TLS | TLS_TPREL))
14001 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14002 else if (indx != 0)
14003 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14004 else
14005 {
14006 if (ifunc)
14007 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14008 else
14009 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14010
14011 /* Write the .got section contents for the sake
14012 of prelink. */
14013 loc = got->contents + off;
14014 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14015 loc);
14016 }
14017
14018 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14019 {
14020 outrel.r_addend += relocation;
14021 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14022 outrel.r_addend -= htab->elf.tls_sec->vma;
14023 }
14024 loc = relgot->contents;
14025 loc += (relgot->reloc_count++
14026 * sizeof (Elf64_External_Rela));
14027 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14028 }
14029
14030 /* Init the .got section contents here if we're not
14031 emitting a reloc. */
14032 else
14033 {
14034 relocation += addend;
14035 if (tls_type == (TLS_TLS | TLS_LD))
14036 relocation = 1;
14037 else if (tls_type != 0)
14038 {
14039 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14040 if (tls_type == (TLS_TLS | TLS_TPREL))
14041 relocation += DTP_OFFSET - TP_OFFSET;
14042
14043 if (tls_type == (TLS_TLS | TLS_GD))
14044 {
14045 bfd_put_64 (output_bfd, relocation,
14046 got->contents + off + 8);
14047 relocation = 1;
14048 }
14049 }
14050
14051 bfd_put_64 (output_bfd, relocation,
14052 got->contents + off);
14053 }
14054 }
14055
14056 if (off >= (bfd_vma) -2)
14057 abort ();
14058
14059 relocation = got->output_section->vma + got->output_offset + off;
14060 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14061 }
14062 break;
14063
14064 case R_PPC64_PLT16_HA:
14065 case R_PPC64_PLT16_HI:
14066 case R_PPC64_PLT16_LO:
14067 case R_PPC64_PLT32:
14068 case R_PPC64_PLT64:
14069 /* Relocation is to the entry for this symbol in the
14070 procedure linkage table. */
14071
14072 /* Resolve a PLT reloc against a local symbol directly,
14073 without using the procedure linkage table. */
14074 if (h == NULL)
14075 break;
14076
14077 /* It's possible that we didn't make a PLT entry for this
14078 symbol. This happens when statically linking PIC code,
14079 or when using -Bsymbolic. Go find a match if there is a
14080 PLT entry. */
14081 if (htab->elf.splt != NULL)
14082 {
14083 struct plt_entry *ent;
14084 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14085 if (ent->plt.offset != (bfd_vma) -1
14086 && ent->addend == orig_rel.r_addend)
14087 {
14088 relocation = (htab->elf.splt->output_section->vma
14089 + htab->elf.splt->output_offset
14090 + ent->plt.offset);
14091 unresolved_reloc = FALSE;
14092 break;
14093 }
14094 }
14095 break;
14096
14097 case R_PPC64_TOC:
14098 /* Relocation value is TOC base. */
14099 relocation = TOCstart;
14100 if (r_symndx == STN_UNDEF)
14101 relocation += htab->stub_group[input_section->id].toc_off;
14102 else if (unresolved_reloc)
14103 ;
14104 else if (sec != NULL && sec->id <= htab->top_id)
14105 relocation += htab->stub_group[sec->id].toc_off;
14106 else
14107 unresolved_reloc = TRUE;
14108 goto dodyn;
14109
14110 /* TOC16 relocs. We want the offset relative to the TOC base,
14111 which is the address of the start of the TOC plus 0x8000.
14112 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14113 in this order. */
14114 case R_PPC64_TOC16:
14115 case R_PPC64_TOC16_LO:
14116 case R_PPC64_TOC16_HI:
14117 case R_PPC64_TOC16_DS:
14118 case R_PPC64_TOC16_LO_DS:
14119 case R_PPC64_TOC16_HA:
14120 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14121 break;
14122
14123 /* Relocate against the beginning of the section. */
14124 case R_PPC64_SECTOFF:
14125 case R_PPC64_SECTOFF_LO:
14126 case R_PPC64_SECTOFF_HI:
14127 case R_PPC64_SECTOFF_DS:
14128 case R_PPC64_SECTOFF_LO_DS:
14129 case R_PPC64_SECTOFF_HA:
14130 if (sec != NULL)
14131 addend -= sec->output_section->vma;
14132 break;
14133
14134 case R_PPC64_REL16:
14135 case R_PPC64_REL16_LO:
14136 case R_PPC64_REL16_HI:
14137 case R_PPC64_REL16_HA:
14138 break;
14139
14140 case R_PPC64_REL14:
14141 case R_PPC64_REL14_BRNTAKEN:
14142 case R_PPC64_REL14_BRTAKEN:
14143 case R_PPC64_REL24:
14144 break;
14145
14146 case R_PPC64_TPREL16:
14147 case R_PPC64_TPREL16_LO:
14148 case R_PPC64_TPREL16_HI:
14149 case R_PPC64_TPREL16_HA:
14150 case R_PPC64_TPREL16_DS:
14151 case R_PPC64_TPREL16_LO_DS:
14152 case R_PPC64_TPREL16_HIGH:
14153 case R_PPC64_TPREL16_HIGHA:
14154 case R_PPC64_TPREL16_HIGHER:
14155 case R_PPC64_TPREL16_HIGHERA:
14156 case R_PPC64_TPREL16_HIGHEST:
14157 case R_PPC64_TPREL16_HIGHESTA:
14158 if (h != NULL
14159 && h->elf.root.type == bfd_link_hash_undefweak
14160 && h->elf.dynindx == -1)
14161 {
14162 /* Make this relocation against an undefined weak symbol
14163 resolve to zero. This is really just a tweak, since
14164 code using weak externs ought to check that they are
14165 defined before using them. */
14166 bfd_byte *p = contents + rel->r_offset - d_offset;
14167
14168 insn = bfd_get_32 (output_bfd, p);
14169 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14170 if (insn != 0)
14171 bfd_put_32 (output_bfd, insn, p);
14172 break;
14173 }
14174 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14175 if (info->shared)
14176 /* The TPREL16 relocs shouldn't really be used in shared
14177 libs as they will result in DT_TEXTREL being set, but
14178 support them anyway. */
14179 goto dodyn;
14180 break;
14181
14182 case R_PPC64_DTPREL16:
14183 case R_PPC64_DTPREL16_LO:
14184 case R_PPC64_DTPREL16_HI:
14185 case R_PPC64_DTPREL16_HA:
14186 case R_PPC64_DTPREL16_DS:
14187 case R_PPC64_DTPREL16_LO_DS:
14188 case R_PPC64_DTPREL16_HIGH:
14189 case R_PPC64_DTPREL16_HIGHA:
14190 case R_PPC64_DTPREL16_HIGHER:
14191 case R_PPC64_DTPREL16_HIGHERA:
14192 case R_PPC64_DTPREL16_HIGHEST:
14193 case R_PPC64_DTPREL16_HIGHESTA:
14194 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14195 break;
14196
14197 case R_PPC64_ADDR64_LOCAL:
14198 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14199 ? h->elf.other
14200 : sym->st_other);
14201 break;
14202
14203 case R_PPC64_DTPMOD64:
14204 relocation = 1;
14205 addend = 0;
14206 goto dodyn;
14207
14208 case R_PPC64_TPREL64:
14209 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14210 goto dodyn;
14211
14212 case R_PPC64_DTPREL64:
14213 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14214 /* Fall thru */
14215
14216 /* Relocations that may need to be propagated if this is a
14217 dynamic object. */
14218 case R_PPC64_REL30:
14219 case R_PPC64_REL32:
14220 case R_PPC64_REL64:
14221 case R_PPC64_ADDR14:
14222 case R_PPC64_ADDR14_BRNTAKEN:
14223 case R_PPC64_ADDR14_BRTAKEN:
14224 case R_PPC64_ADDR16:
14225 case R_PPC64_ADDR16_DS:
14226 case R_PPC64_ADDR16_HA:
14227 case R_PPC64_ADDR16_HI:
14228 case R_PPC64_ADDR16_HIGH:
14229 case R_PPC64_ADDR16_HIGHA:
14230 case R_PPC64_ADDR16_HIGHER:
14231 case R_PPC64_ADDR16_HIGHERA:
14232 case R_PPC64_ADDR16_HIGHEST:
14233 case R_PPC64_ADDR16_HIGHESTA:
14234 case R_PPC64_ADDR16_LO:
14235 case R_PPC64_ADDR16_LO_DS:
14236 case R_PPC64_ADDR24:
14237 case R_PPC64_ADDR32:
14238 case R_PPC64_ADDR64:
14239 case R_PPC64_UADDR16:
14240 case R_PPC64_UADDR32:
14241 case R_PPC64_UADDR64:
14242 dodyn:
14243 if ((input_section->flags & SEC_ALLOC) == 0)
14244 break;
14245
14246 if (NO_OPD_RELOCS && is_opd)
14247 break;
14248
14249 if ((info->shared
14250 && (h == NULL
14251 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14252 || h->elf.root.type != bfd_link_hash_undefweak)
14253 && (must_be_dyn_reloc (info, r_type)
14254 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14255 || (ELIMINATE_COPY_RELOCS
14256 && !info->shared
14257 && h != NULL
14258 && h->elf.dynindx != -1
14259 && !h->elf.non_got_ref
14260 && !h->elf.def_regular)
14261 || (!info->shared
14262 && (h != NULL
14263 ? h->elf.type == STT_GNU_IFUNC
14264 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14265 {
14266 bfd_boolean skip, relocate;
14267 asection *sreloc;
14268 bfd_vma out_off;
14269
14270 /* When generating a dynamic object, these relocations
14271 are copied into the output file to be resolved at run
14272 time. */
14273
14274 skip = FALSE;
14275 relocate = FALSE;
14276
14277 out_off = _bfd_elf_section_offset (output_bfd, info,
14278 input_section, rel->r_offset);
14279 if (out_off == (bfd_vma) -1)
14280 skip = TRUE;
14281 else if (out_off == (bfd_vma) -2)
14282 skip = TRUE, relocate = TRUE;
14283 out_off += (input_section->output_section->vma
14284 + input_section->output_offset);
14285 outrel.r_offset = out_off;
14286 outrel.r_addend = rel->r_addend;
14287
14288 /* Optimize unaligned reloc use. */
14289 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14290 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14291 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14292 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14293 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14294 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14295 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14296 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14297 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14298
14299 if (skip)
14300 memset (&outrel, 0, sizeof outrel);
14301 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14302 && !is_opd
14303 && r_type != R_PPC64_TOC)
14304 {
14305 BFD_ASSERT (h->elf.dynindx != -1);
14306 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14307 }
14308 else
14309 {
14310 /* This symbol is local, or marked to become local,
14311 or this is an opd section reloc which must point
14312 at a local function. */
14313 outrel.r_addend += relocation;
14314 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14315 {
14316 if (is_opd && h != NULL)
14317 {
14318 /* Lie about opd entries. This case occurs
14319 when building shared libraries and we
14320 reference a function in another shared
14321 lib. The same thing happens for a weak
14322 definition in an application that's
14323 overridden by a strong definition in a
14324 shared lib. (I believe this is a generic
14325 bug in binutils handling of weak syms.)
14326 In these cases we won't use the opd
14327 entry in this lib. */
14328 unresolved_reloc = FALSE;
14329 }
14330 if (!is_opd
14331 && r_type == R_PPC64_ADDR64
14332 && (h != NULL
14333 ? h->elf.type == STT_GNU_IFUNC
14334 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14335 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14336 else
14337 {
14338 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14339
14340 /* We need to relocate .opd contents for ld.so.
14341 Prelink also wants simple and consistent rules
14342 for relocs. This make all RELATIVE relocs have
14343 *r_offset equal to r_addend. */
14344 relocate = TRUE;
14345 }
14346 }
14347 else
14348 {
14349 long indx = 0;
14350
14351 if (h != NULL
14352 ? h->elf.type == STT_GNU_IFUNC
14353 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14354 {
14355 info->callbacks->einfo
14356 (_("%P: %H: %s for indirect "
14357 "function `%T' unsupported\n"),
14358 input_bfd, input_section, rel->r_offset,
14359 ppc64_elf_howto_table[r_type]->name,
14360 sym_name);
14361 ret = FALSE;
14362 }
14363 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14364 ;
14365 else if (sec == NULL || sec->owner == NULL)
14366 {
14367 bfd_set_error (bfd_error_bad_value);
14368 return FALSE;
14369 }
14370 else
14371 {
14372 asection *osec;
14373
14374 osec = sec->output_section;
14375 indx = elf_section_data (osec)->dynindx;
14376
14377 if (indx == 0)
14378 {
14379 if ((osec->flags & SEC_READONLY) == 0
14380 && htab->elf.data_index_section != NULL)
14381 osec = htab->elf.data_index_section;
14382 else
14383 osec = htab->elf.text_index_section;
14384 indx = elf_section_data (osec)->dynindx;
14385 }
14386 BFD_ASSERT (indx != 0);
14387
14388 /* We are turning this relocation into one
14389 against a section symbol, so subtract out
14390 the output section's address but not the
14391 offset of the input section in the output
14392 section. */
14393 outrel.r_addend -= osec->vma;
14394 }
14395
14396 outrel.r_info = ELF64_R_INFO (indx, r_type);
14397 }
14398 }
14399
14400 sreloc = elf_section_data (input_section)->sreloc;
14401 if (h != NULL
14402 ? h->elf.type == STT_GNU_IFUNC
14403 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14404 sreloc = htab->elf.irelplt;
14405 if (sreloc == NULL)
14406 abort ();
14407
14408 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14409 >= sreloc->size)
14410 abort ();
14411 loc = sreloc->contents;
14412 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14413 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14414
14415 /* If this reloc is against an external symbol, it will
14416 be computed at runtime, so there's no need to do
14417 anything now. However, for the sake of prelink ensure
14418 that the section contents are a known value. */
14419 if (! relocate)
14420 {
14421 unresolved_reloc = FALSE;
14422 /* The value chosen here is quite arbitrary as ld.so
14423 ignores section contents except for the special
14424 case of .opd where the contents might be accessed
14425 before relocation. Choose zero, as that won't
14426 cause reloc overflow. */
14427 relocation = 0;
14428 addend = 0;
14429 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14430 to improve backward compatibility with older
14431 versions of ld. */
14432 if (r_type == R_PPC64_ADDR64)
14433 addend = outrel.r_addend;
14434 /* Adjust pc_relative relocs to have zero in *r_offset. */
14435 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14436 addend = (input_section->output_section->vma
14437 + input_section->output_offset
14438 + rel->r_offset);
14439 }
14440 }
14441 break;
14442
14443 case R_PPC64_COPY:
14444 case R_PPC64_GLOB_DAT:
14445 case R_PPC64_JMP_SLOT:
14446 case R_PPC64_JMP_IREL:
14447 case R_PPC64_RELATIVE:
14448 /* We shouldn't ever see these dynamic relocs in relocatable
14449 files. */
14450 /* Fall through. */
14451
14452 case R_PPC64_PLTGOT16:
14453 case R_PPC64_PLTGOT16_DS:
14454 case R_PPC64_PLTGOT16_HA:
14455 case R_PPC64_PLTGOT16_HI:
14456 case R_PPC64_PLTGOT16_LO:
14457 case R_PPC64_PLTGOT16_LO_DS:
14458 case R_PPC64_PLTREL32:
14459 case R_PPC64_PLTREL64:
14460 /* These ones haven't been implemented yet. */
14461
14462 info->callbacks->einfo
14463 (_("%P: %B: %s is not supported for `%T'\n"),
14464 input_bfd,
14465 ppc64_elf_howto_table[r_type]->name, sym_name);
14466
14467 bfd_set_error (bfd_error_invalid_operation);
14468 ret = FALSE;
14469 continue;
14470 }
14471
14472 /* Multi-instruction sequences that access the TOC can be
14473 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14474 to nop; addi rb,r2,x; */
14475 switch (r_type)
14476 {
14477 default:
14478 break;
14479
14480 case R_PPC64_GOT_TLSLD16_HI:
14481 case R_PPC64_GOT_TLSGD16_HI:
14482 case R_PPC64_GOT_TPREL16_HI:
14483 case R_PPC64_GOT_DTPREL16_HI:
14484 case R_PPC64_GOT16_HI:
14485 case R_PPC64_TOC16_HI:
14486 /* These relocs would only be useful if building up an
14487 offset to later add to r2, perhaps in an indexed
14488 addressing mode instruction. Don't try to optimize.
14489 Unfortunately, the possibility of someone building up an
14490 offset like this or even with the HA relocs, means that
14491 we need to check the high insn when optimizing the low
14492 insn. */
14493 break;
14494
14495 case R_PPC64_GOT_TLSLD16_HA:
14496 case R_PPC64_GOT_TLSGD16_HA:
14497 case R_PPC64_GOT_TPREL16_HA:
14498 case R_PPC64_GOT_DTPREL16_HA:
14499 case R_PPC64_GOT16_HA:
14500 case R_PPC64_TOC16_HA:
14501 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14502 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14503 {
14504 bfd_byte *p = contents + (rel->r_offset & ~3);
14505 bfd_put_32 (input_bfd, NOP, p);
14506 }
14507 break;
14508
14509 case R_PPC64_GOT_TLSLD16_LO:
14510 case R_PPC64_GOT_TLSGD16_LO:
14511 case R_PPC64_GOT_TPREL16_LO_DS:
14512 case R_PPC64_GOT_DTPREL16_LO_DS:
14513 case R_PPC64_GOT16_LO:
14514 case R_PPC64_GOT16_LO_DS:
14515 case R_PPC64_TOC16_LO:
14516 case R_PPC64_TOC16_LO_DS:
14517 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14518 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14519 {
14520 bfd_byte *p = contents + (rel->r_offset & ~3);
14521 insn = bfd_get_32 (input_bfd, p);
14522 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14523 {
14524 /* Transform addic to addi when we change reg. */
14525 insn &= ~((0x3f << 26) | (0x1f << 16));
14526 insn |= (14u << 26) | (2 << 16);
14527 }
14528 else
14529 {
14530 insn &= ~(0x1f << 16);
14531 insn |= 2 << 16;
14532 }
14533 bfd_put_32 (input_bfd, insn, p);
14534 }
14535 break;
14536 }
14537
14538 /* Do any further special processing. */
14539 howto = ppc64_elf_howto_table[(int) r_type];
14540 switch (r_type)
14541 {
14542 default:
14543 break;
14544
14545 case R_PPC64_REL16_HA:
14546 case R_PPC64_ADDR16_HA:
14547 case R_PPC64_ADDR16_HIGHA:
14548 case R_PPC64_ADDR16_HIGHERA:
14549 case R_PPC64_ADDR16_HIGHESTA:
14550 case R_PPC64_TOC16_HA:
14551 case R_PPC64_SECTOFF_HA:
14552 case R_PPC64_TPREL16_HA:
14553 case R_PPC64_TPREL16_HIGHA:
14554 case R_PPC64_TPREL16_HIGHERA:
14555 case R_PPC64_TPREL16_HIGHESTA:
14556 case R_PPC64_DTPREL16_HA:
14557 case R_PPC64_DTPREL16_HIGHA:
14558 case R_PPC64_DTPREL16_HIGHERA:
14559 case R_PPC64_DTPREL16_HIGHESTA:
14560 /* It's just possible that this symbol is a weak symbol
14561 that's not actually defined anywhere. In that case,
14562 'sec' would be NULL, and we should leave the symbol
14563 alone (it will be set to zero elsewhere in the link). */
14564 if (sec == NULL)
14565 break;
14566 /* Fall thru */
14567
14568 case R_PPC64_GOT16_HA:
14569 case R_PPC64_PLTGOT16_HA:
14570 case R_PPC64_PLT16_HA:
14571 case R_PPC64_GOT_TLSGD16_HA:
14572 case R_PPC64_GOT_TLSLD16_HA:
14573 case R_PPC64_GOT_TPREL16_HA:
14574 case R_PPC64_GOT_DTPREL16_HA:
14575 /* Add 0x10000 if sign bit in 0:15 is set.
14576 Bits 0:15 are not used. */
14577 addend += 0x8000;
14578 break;
14579
14580 case R_PPC64_ADDR16_DS:
14581 case R_PPC64_ADDR16_LO_DS:
14582 case R_PPC64_GOT16_DS:
14583 case R_PPC64_GOT16_LO_DS:
14584 case R_PPC64_PLT16_LO_DS:
14585 case R_PPC64_SECTOFF_DS:
14586 case R_PPC64_SECTOFF_LO_DS:
14587 case R_PPC64_TOC16_DS:
14588 case R_PPC64_TOC16_LO_DS:
14589 case R_PPC64_PLTGOT16_DS:
14590 case R_PPC64_PLTGOT16_LO_DS:
14591 case R_PPC64_GOT_TPREL16_DS:
14592 case R_PPC64_GOT_TPREL16_LO_DS:
14593 case R_PPC64_GOT_DTPREL16_DS:
14594 case R_PPC64_GOT_DTPREL16_LO_DS:
14595 case R_PPC64_TPREL16_DS:
14596 case R_PPC64_TPREL16_LO_DS:
14597 case R_PPC64_DTPREL16_DS:
14598 case R_PPC64_DTPREL16_LO_DS:
14599 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14600 mask = 3;
14601 /* If this reloc is against an lq insn, then the value must be
14602 a multiple of 16. This is somewhat of a hack, but the
14603 "correct" way to do this by defining _DQ forms of all the
14604 _DS relocs bloats all reloc switches in this file. It
14605 doesn't seem to make much sense to use any of these relocs
14606 in data, so testing the insn should be safe. */
14607 if ((insn & (0x3f << 26)) == (56u << 26))
14608 mask = 15;
14609 if (((relocation + addend) & mask) != 0)
14610 {
14611 info->callbacks->einfo
14612 (_("%P: %H: error: %s not a multiple of %u\n"),
14613 input_bfd, input_section, rel->r_offset,
14614 howto->name,
14615 mask + 1);
14616 bfd_set_error (bfd_error_bad_value);
14617 ret = FALSE;
14618 continue;
14619 }
14620 break;
14621 }
14622
14623 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14624 because such sections are not SEC_ALLOC and thus ld.so will
14625 not process them. */
14626 if (unresolved_reloc
14627 && !((input_section->flags & SEC_DEBUGGING) != 0
14628 && h->elf.def_dynamic)
14629 && _bfd_elf_section_offset (output_bfd, info, input_section,
14630 rel->r_offset) != (bfd_vma) -1)
14631 {
14632 info->callbacks->einfo
14633 (_("%P: %H: unresolvable %s against `%T'\n"),
14634 input_bfd, input_section, rel->r_offset,
14635 howto->name,
14636 h->elf.root.root.string);
14637 ret = FALSE;
14638 }
14639
14640 /* 16-bit fields in insns mostly have signed values, but a
14641 few insns have 16-bit unsigned values. Really, we should
14642 have different reloc types. */
14643 if (howto->complain_on_overflow != complain_overflow_dont
14644 && howto->dst_mask == 0xffff
14645 && (input_section->flags & SEC_CODE) != 0)
14646 {
14647 enum complain_overflow complain = complain_overflow_signed;
14648
14649 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14650 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14651 complain = complain_overflow_bitfield;
14652 else if (howto->rightshift == 0
14653 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14654 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14655 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
14656 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14657 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14658 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14659 complain = complain_overflow_unsigned;
14660 if (howto->complain_on_overflow != complain)
14661 {
14662 alt_howto = *howto;
14663 alt_howto.complain_on_overflow = complain;
14664 howto = &alt_howto;
14665 }
14666 }
14667
14668 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14669 rel->r_offset, relocation, addend);
14670
14671 if (r != bfd_reloc_ok)
14672 {
14673 char *more_info = NULL;
14674 const char *reloc_name = howto->name;
14675
14676 if (reloc_dest != DEST_NORMAL)
14677 {
14678 more_info = bfd_malloc (strlen (reloc_name) + 8);
14679 if (more_info != NULL)
14680 {
14681 strcpy (more_info, reloc_name);
14682 strcat (more_info, (reloc_dest == DEST_OPD
14683 ? " (OPD)" : " (stub)"));
14684 reloc_name = more_info;
14685 }
14686 }
14687
14688 if (r == bfd_reloc_overflow)
14689 {
14690 if (warned)
14691 continue;
14692 if (h != NULL
14693 && h->elf.root.type == bfd_link_hash_undefweak
14694 && howto->pc_relative)
14695 {
14696 /* Assume this is a call protected by other code that
14697 detects the symbol is undefined. If this is the case,
14698 we can safely ignore the overflow. If not, the
14699 program is hosed anyway, and a little warning isn't
14700 going to help. */
14701
14702 continue;
14703 }
14704
14705 if (!((*info->callbacks->reloc_overflow)
14706 (info, &h->elf.root, sym_name,
14707 reloc_name, orig_rel.r_addend,
14708 input_bfd, input_section, rel->r_offset)))
14709 return FALSE;
14710 }
14711 else
14712 {
14713 info->callbacks->einfo
14714 (_("%P: %H: %s against `%T': error %d\n"),
14715 input_bfd, input_section, rel->r_offset,
14716 reloc_name, sym_name, (int) r);
14717 ret = FALSE;
14718 }
14719 if (more_info != NULL)
14720 free (more_info);
14721 }
14722 }
14723
14724 /* If we're emitting relocations, then shortly after this function
14725 returns, reloc offsets and addends for this section will be
14726 adjusted. Worse, reloc symbol indices will be for the output
14727 file rather than the input. Save a copy of the relocs for
14728 opd_entry_value. */
14729 if (is_opd && (info->emitrelocations || info->relocatable))
14730 {
14731 bfd_size_type amt;
14732 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14733 rel = bfd_alloc (input_bfd, amt);
14734 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14735 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14736 if (rel == NULL)
14737 return FALSE;
14738 memcpy (rel, relocs, amt);
14739 }
14740 return ret;
14741 }
14742
14743 /* Adjust the value of any local symbols in opd sections. */
14744
14745 static int
14746 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14747 const char *name ATTRIBUTE_UNUSED,
14748 Elf_Internal_Sym *elfsym,
14749 asection *input_sec,
14750 struct elf_link_hash_entry *h)
14751 {
14752 struct _opd_sec_data *opd;
14753 long adjust;
14754 bfd_vma value;
14755
14756 if (h != NULL)
14757 return 1;
14758
14759 opd = get_opd_info (input_sec);
14760 if (opd == NULL || opd->adjust == NULL)
14761 return 1;
14762
14763 value = elfsym->st_value - input_sec->output_offset;
14764 if (!info->relocatable)
14765 value -= input_sec->output_section->vma;
14766
14767 adjust = opd->adjust[value / 8];
14768 if (adjust == -1)
14769 return 2;
14770
14771 elfsym->st_value += adjust;
14772 return 1;
14773 }
14774
14775 /* Finish up dynamic symbol handling. We set the contents of various
14776 dynamic sections here. */
14777
14778 static bfd_boolean
14779 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14780 struct bfd_link_info *info,
14781 struct elf_link_hash_entry *h,
14782 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14783 {
14784 struct ppc_link_hash_table *htab;
14785 struct plt_entry *ent;
14786 Elf_Internal_Rela rela;
14787 bfd_byte *loc;
14788
14789 htab = ppc_hash_table (info);
14790 if (htab == NULL)
14791 return FALSE;
14792
14793 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14794 if (ent->plt.offset != (bfd_vma) -1)
14795 {
14796 /* This symbol has an entry in the procedure linkage
14797 table. Set it up. */
14798 if (!htab->elf.dynamic_sections_created
14799 || h->dynindx == -1)
14800 {
14801 BFD_ASSERT (h->type == STT_GNU_IFUNC
14802 && h->def_regular
14803 && (h->root.type == bfd_link_hash_defined
14804 || h->root.type == bfd_link_hash_defweak));
14805 rela.r_offset = (htab->elf.iplt->output_section->vma
14806 + htab->elf.iplt->output_offset
14807 + ent->plt.offset);
14808 if (htab->opd_abi)
14809 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14810 else
14811 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14812 rela.r_addend = (h->root.u.def.value
14813 + h->root.u.def.section->output_offset
14814 + h->root.u.def.section->output_section->vma
14815 + ent->addend);
14816 loc = (htab->elf.irelplt->contents
14817 + (htab->elf.irelplt->reloc_count++
14818 * sizeof (Elf64_External_Rela)));
14819 }
14820 else
14821 {
14822 rela.r_offset = (htab->elf.splt->output_section->vma
14823 + htab->elf.splt->output_offset
14824 + ent->plt.offset);
14825 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14826 rela.r_addend = ent->addend;
14827 loc = (htab->elf.srelplt->contents
14828 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14829 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14830 }
14831 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14832
14833 if (!htab->opd_abi)
14834 {
14835 if (!h->def_regular)
14836 {
14837 /* Mark the symbol as undefined, rather than as
14838 defined in glink. Leave the value if there were
14839 any relocations where pointer equality matters
14840 (this is a clue for the dynamic linker, to make
14841 function pointer comparisons work between an
14842 application and shared library), otherwise set it
14843 to zero. */
14844 sym->st_shndx = SHN_UNDEF;
14845 if (!h->pointer_equality_needed)
14846 sym->st_value = 0;
14847 else if (!h->ref_regular_nonweak)
14848 {
14849 /* This breaks function pointer comparisons, but
14850 that is better than breaking tests for a NULL
14851 function pointer. */
14852 sym->st_value = 0;
14853 }
14854 }
14855 }
14856 }
14857
14858 if (h->needs_copy)
14859 {
14860 /* This symbol needs a copy reloc. Set it up. */
14861
14862 if (h->dynindx == -1
14863 || (h->root.type != bfd_link_hash_defined
14864 && h->root.type != bfd_link_hash_defweak)
14865 || htab->relbss == NULL)
14866 abort ();
14867
14868 rela.r_offset = (h->root.u.def.value
14869 + h->root.u.def.section->output_section->vma
14870 + h->root.u.def.section->output_offset);
14871 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14872 rela.r_addend = 0;
14873 loc = htab->relbss->contents;
14874 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14875 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14876 }
14877
14878 return TRUE;
14879 }
14880
14881 /* Used to decide how to sort relocs in an optimal manner for the
14882 dynamic linker, before writing them out. */
14883
14884 static enum elf_reloc_type_class
14885 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14886 const asection *rel_sec,
14887 const Elf_Internal_Rela *rela)
14888 {
14889 enum elf_ppc64_reloc_type r_type;
14890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14891
14892 if (rel_sec == htab->elf.irelplt)
14893 return reloc_class_ifunc;
14894
14895 r_type = ELF64_R_TYPE (rela->r_info);
14896 switch (r_type)
14897 {
14898 case R_PPC64_RELATIVE:
14899 return reloc_class_relative;
14900 case R_PPC64_JMP_SLOT:
14901 return reloc_class_plt;
14902 case R_PPC64_COPY:
14903 return reloc_class_copy;
14904 default:
14905 return reloc_class_normal;
14906 }
14907 }
14908
14909 /* Finish up the dynamic sections. */
14910
14911 static bfd_boolean
14912 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14913 struct bfd_link_info *info)
14914 {
14915 struct ppc_link_hash_table *htab;
14916 bfd *dynobj;
14917 asection *sdyn;
14918
14919 htab = ppc_hash_table (info);
14920 if (htab == NULL)
14921 return FALSE;
14922
14923 dynobj = htab->elf.dynobj;
14924 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14925
14926 if (htab->elf.dynamic_sections_created)
14927 {
14928 Elf64_External_Dyn *dyncon, *dynconend;
14929
14930 if (sdyn == NULL || htab->elf.sgot == NULL)
14931 abort ();
14932
14933 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14934 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14935 for (; dyncon < dynconend; dyncon++)
14936 {
14937 Elf_Internal_Dyn dyn;
14938 asection *s;
14939
14940 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14941
14942 switch (dyn.d_tag)
14943 {
14944 default:
14945 continue;
14946
14947 case DT_PPC64_GLINK:
14948 s = htab->glink;
14949 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14950 /* We stupidly defined DT_PPC64_GLINK to be the start
14951 of glink rather than the first entry point, which is
14952 what ld.so needs, and now have a bigger stub to
14953 support automatic multiple TOCs. */
14954 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
14955 break;
14956
14957 case DT_PPC64_OPD:
14958 s = bfd_get_section_by_name (output_bfd, ".opd");
14959 if (s == NULL)
14960 continue;
14961 dyn.d_un.d_ptr = s->vma;
14962 break;
14963
14964 case DT_PPC64_OPT:
14965 if (htab->do_multi_toc && htab->multi_toc_needed)
14966 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
14967 break;
14968
14969 case DT_PPC64_OPDSZ:
14970 s = bfd_get_section_by_name (output_bfd, ".opd");
14971 if (s == NULL)
14972 continue;
14973 dyn.d_un.d_val = s->size;
14974 break;
14975
14976 case DT_PLTGOT:
14977 s = htab->elf.splt;
14978 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14979 break;
14980
14981 case DT_JMPREL:
14982 s = htab->elf.srelplt;
14983 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14984 break;
14985
14986 case DT_PLTRELSZ:
14987 dyn.d_un.d_val = htab->elf.srelplt->size;
14988 break;
14989
14990 case DT_RELASZ:
14991 /* Don't count procedure linkage table relocs in the
14992 overall reloc count. */
14993 s = htab->elf.srelplt;
14994 if (s == NULL)
14995 continue;
14996 dyn.d_un.d_val -= s->size;
14997 break;
14998
14999 case DT_RELA:
15000 /* We may not be using the standard ELF linker script.
15001 If .rela.plt is the first .rela section, we adjust
15002 DT_RELA to not include it. */
15003 s = htab->elf.srelplt;
15004 if (s == NULL)
15005 continue;
15006 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15007 continue;
15008 dyn.d_un.d_ptr += s->size;
15009 break;
15010 }
15011
15012 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15013 }
15014 }
15015
15016 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15017 {
15018 /* Fill in the first entry in the global offset table.
15019 We use it to hold the link-time TOCbase. */
15020 bfd_put_64 (output_bfd,
15021 elf_gp (output_bfd) + TOC_BASE_OFF,
15022 htab->elf.sgot->contents);
15023
15024 /* Set .got entry size. */
15025 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15026 }
15027
15028 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15029 {
15030 /* Set .plt entry size. */
15031 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15032 = PLT_ENTRY_SIZE (htab);
15033 }
15034
15035 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15036 brlt ourselves if emitrelocations. */
15037 if (htab->brlt != NULL
15038 && htab->brlt->reloc_count != 0
15039 && !_bfd_elf_link_output_relocs (output_bfd,
15040 htab->brlt,
15041 elf_section_data (htab->brlt)->rela.hdr,
15042 elf_section_data (htab->brlt)->relocs,
15043 NULL))
15044 return FALSE;
15045
15046 if (htab->glink != NULL
15047 && htab->glink->reloc_count != 0
15048 && !_bfd_elf_link_output_relocs (output_bfd,
15049 htab->glink,
15050 elf_section_data (htab->glink)->rela.hdr,
15051 elf_section_data (htab->glink)->relocs,
15052 NULL))
15053 return FALSE;
15054
15055
15056 if (htab->glink_eh_frame != NULL
15057 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15058 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15059 htab->glink_eh_frame,
15060 htab->glink_eh_frame->contents))
15061 return FALSE;
15062
15063 /* We need to handle writing out multiple GOT sections ourselves,
15064 since we didn't add them to DYNOBJ. We know dynobj is the first
15065 bfd. */
15066 while ((dynobj = dynobj->link.next) != NULL)
15067 {
15068 asection *s;
15069
15070 if (!is_ppc64_elf (dynobj))
15071 continue;
15072
15073 s = ppc64_elf_tdata (dynobj)->got;
15074 if (s != NULL
15075 && s->size != 0
15076 && s->output_section != bfd_abs_section_ptr
15077 && !bfd_set_section_contents (output_bfd, s->output_section,
15078 s->contents, s->output_offset,
15079 s->size))
15080 return FALSE;
15081 s = ppc64_elf_tdata (dynobj)->relgot;
15082 if (s != NULL
15083 && s->size != 0
15084 && s->output_section != bfd_abs_section_ptr
15085 && !bfd_set_section_contents (output_bfd, s->output_section,
15086 s->contents, s->output_offset,
15087 s->size))
15088 return FALSE;
15089 }
15090
15091 return TRUE;
15092 }
15093
15094 #include "elf64-target.h"
15095
15096 /* FreeBSD support */
15097
15098 #undef TARGET_LITTLE_SYM
15099 #undef TARGET_LITTLE_NAME
15100
15101 #undef TARGET_BIG_SYM
15102 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15103 #undef TARGET_BIG_NAME
15104 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15105
15106 #undef ELF_OSABI
15107 #define ELF_OSABI ELFOSABI_FREEBSD
15108
15109 #undef elf64_bed
15110 #define elf64_bed elf64_powerpc_fbsd_bed
15111
15112 #include "elf64-target.h"
15113
GDB Binutils - Deliverables
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