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[AArch64] Tidy up in aarch64_mem_op_p().
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2015 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 0x10000
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
239 static inline int
240 abiversion (bfd *abfd)
241 {
242 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
243 }
244
245 static inline void
246 set_abiversion (bfd *abfd, int ver)
247 {
248 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
249 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
250 }
251 \f
252 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
253
254 /* Relocation HOWTO's. */
255 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
256
257 static reloc_howto_type ppc64_elf_howto_raw[] = {
258 /* This reloc does nothing. */
259 HOWTO (R_PPC64_NONE, /* type */
260 0, /* rightshift */
261 3, /* size (0 = byte, 1 = short, 2 = long) */
262 0, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_dont, /* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_PPC64_NONE", /* name */
268 FALSE, /* partial_inplace */
269 0, /* src_mask */
270 0, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 /* A standard 32 bit relocation. */
274 HOWTO (R_PPC64_ADDR32, /* type */
275 0, /* rightshift */
276 2, /* size (0 = byte, 1 = short, 2 = long) */
277 32, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_bitfield, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_ADDR32", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0xffffffff, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* An absolute 26 bit branch; the lower two bits must be zero.
289 FIXME: we don't check that, we just clear them. */
290 HOWTO (R_PPC64_ADDR24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_ADDR24", /* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* A standard 16 bit relocation. */
305 HOWTO (R_PPC64_ADDR16, /* type */
306 0, /* rightshift */
307 1, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR16", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xffff, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A 16 bit relocation without overflow. */
320 HOWTO (R_PPC64_ADDR16_LO, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_dont,/* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16_LO", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* Bits 16-31 of an address. */
335 HOWTO (R_PPC64_ADDR16_HI, /* type */
336 16, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_HI", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
350 bits, treated as a signed number, is negative. */
351 HOWTO (R_PPC64_ADDR16_HA, /* type */
352 16, /* rightshift */
353 1, /* size (0 = byte, 1 = short, 2 = long) */
354 16, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_signed, /* complain_on_overflow */
358 ppc64_elf_ha_reloc, /* special_function */
359 "R_PPC64_ADDR16_HA", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* An absolute 16 bit branch; the lower two bits must be zero.
366 FIXME: we don't check that, we just clear them. */
367 HOWTO (R_PPC64_ADDR14, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 16, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 ppc64_elf_branch_reloc, /* special_function */
375 "R_PPC64_ADDR14", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0x0000fffc, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 /* An absolute 16 bit branch, for which bit 10 should be set to
382 indicate that the branch is expected to be taken. The lower two
383 bits must be zero. */
384 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_brtaken_reloc, /* special_function */
392 "R_PPC64_ADDR14_BRTAKEN",/* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* An absolute 16 bit branch, for which bit 10 should be set to
399 indicate that the branch is not expected to be taken. The lower
400 two bits must be zero. */
401 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_ADDR14_BRNTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* A relative 26 bit branch; the lower two bits must be zero. */
416 HOWTO (R_PPC64_REL24, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 26, /* bitsize */
420 TRUE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_branch_reloc, /* special_function */
424 "R_PPC64_REL24", /* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x03fffffc, /* dst_mask */
428 TRUE), /* pcrel_offset */
429
430 /* A relative 16 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL14, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL14", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x0000fffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch. Bit 10 should be set to indicate that
446 the branch is expected to be taken. The lower two bits must be
447 zero. */
448 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
449 0, /* rightshift */
450 2, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 TRUE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_signed, /* complain_on_overflow */
455 ppc64_elf_brtaken_reloc, /* special_function */
456 "R_PPC64_REL14_BRTAKEN", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0x0000fffc, /* dst_mask */
460 TRUE), /* pcrel_offset */
461
462 /* A relative 16 bit branch. Bit 10 should be set to indicate that
463 the branch is not expected to be taken. The lower two bits must
464 be zero. */
465 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 ppc64_elf_brtaken_reloc, /* special_function */
473 "R_PPC64_REL14_BRNTAKEN",/* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x0000fffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
480 symbol. */
481 HOWTO (R_PPC64_GOT16, /* type */
482 0, /* rightshift */
483 1, /* size (0 = byte, 1 = short, 2 = long) */
484 16, /* bitsize */
485 FALSE, /* pc_relative */
486 0, /* bitpos */
487 complain_overflow_signed, /* complain_on_overflow */
488 ppc64_elf_unhandled_reloc, /* special_function */
489 "R_PPC64_GOT16", /* name */
490 FALSE, /* partial_inplace */
491 0, /* src_mask */
492 0xffff, /* dst_mask */
493 FALSE), /* pcrel_offset */
494
495 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
496 the symbol. */
497 HOWTO (R_PPC64_GOT16_LO, /* type */
498 0, /* rightshift */
499 1, /* size (0 = byte, 1 = short, 2 = long) */
500 16, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont, /* complain_on_overflow */
504 ppc64_elf_unhandled_reloc, /* special_function */
505 "R_PPC64_GOT16_LO", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
512 the symbol. */
513 HOWTO (R_PPC64_GOT16_HI, /* type */
514 16, /* rightshift */
515 1, /* size (0 = byte, 1 = short, 2 = long) */
516 16, /* bitsize */
517 FALSE, /* pc_relative */
518 0, /* bitpos */
519 complain_overflow_signed,/* complain_on_overflow */
520 ppc64_elf_unhandled_reloc, /* special_function */
521 "R_PPC64_GOT16_HI", /* name */
522 FALSE, /* partial_inplace */
523 0, /* src_mask */
524 0xffff, /* dst_mask */
525 FALSE), /* pcrel_offset */
526
527 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
528 the symbol. */
529 HOWTO (R_PPC64_GOT16_HA, /* type */
530 16, /* rightshift */
531 1, /* size (0 = byte, 1 = short, 2 = long) */
532 16, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_signed,/* complain_on_overflow */
536 ppc64_elf_unhandled_reloc, /* special_function */
537 "R_PPC64_GOT16_HA", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0xffff, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* This is used only by the dynamic linker. The symbol should exist
544 both in the object being run and in some shared library. The
545 dynamic linker copies the data addressed by the symbol from the
546 shared library into the object, because the object being
547 run has to have the data at some particular address. */
548 HOWTO (R_PPC64_COPY, /* type */
549 0, /* rightshift */
550 0, /* this one is variable size */
551 0, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_dont, /* complain_on_overflow */
555 ppc64_elf_unhandled_reloc, /* special_function */
556 "R_PPC64_COPY", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR64, but used when setting global offset table
563 entries. */
564 HOWTO (R_PPC64_GLOB_DAT, /* type */
565 0, /* rightshift */
566 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
567 64, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_GLOB_DAT", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 ONES (64), /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* Created by the link editor. Marks a procedure linkage table
579 entry for a symbol. */
580 HOWTO (R_PPC64_JMP_SLOT, /* type */
581 0, /* rightshift */
582 0, /* size (0 = byte, 1 = short, 2 = long) */
583 0, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_JMP_SLOT", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* Used only by the dynamic linker. When the object is run, this
595 doubleword64 is set to the load address of the object, plus the
596 addend. */
597 HOWTO (R_PPC64_RELATIVE, /* type */
598 0, /* rightshift */
599 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
600 64, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_dont, /* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_PPC64_RELATIVE", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 ONES (64), /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* Like R_PPC64_ADDR32, but may be unaligned. */
612 HOWTO (R_PPC64_UADDR32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_UADDR32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0xffffffff, /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR16, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR16, /* type */
628 0, /* rightshift */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
630 16, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR16", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* 32-bit PC relative. */
642 HOWTO (R_PPC64_REL32, /* type */
643 0, /* rightshift */
644 2, /* size (0 = byte, 1 = short, 2 = long) */
645 32, /* bitsize */
646 TRUE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_signed, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_REL32", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffffffff, /* dst_mask */
654 TRUE), /* pcrel_offset */
655
656 /* 32-bit relocation to the symbol's procedure linkage table. */
657 HOWTO (R_PPC64_PLT32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_bitfield, /* complain_on_overflow */
664 ppc64_elf_unhandled_reloc, /* special_function */
665 "R_PPC64_PLT32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 FALSE), /* pcrel_offset */
670
671 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
672 FIXME: R_PPC64_PLTREL32 not supported. */
673 HOWTO (R_PPC64_PLTREL32, /* type */
674 0, /* rightshift */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
676 32, /* bitsize */
677 TRUE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_signed, /* complain_on_overflow */
680 bfd_elf_generic_reloc, /* special_function */
681 "R_PPC64_PLTREL32", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0xffffffff, /* dst_mask */
685 TRUE), /* pcrel_offset */
686
687 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
688 the symbol. */
689 HOWTO (R_PPC64_PLT16_LO, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 ppc64_elf_unhandled_reloc, /* special_function */
697 "R_PPC64_PLT16_LO", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
704 the symbol. */
705 HOWTO (R_PPC64_PLT16_HI, /* type */
706 16, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_signed, /* complain_on_overflow */
712 ppc64_elf_unhandled_reloc, /* special_function */
713 "R_PPC64_PLT16_HI", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
720 the symbol. */
721 HOWTO (R_PPC64_PLT16_HA, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 ppc64_elf_unhandled_reloc, /* special_function */
729 "R_PPC64_PLT16_HA", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit section relative relocation. */
736 HOWTO (R_PPC64_SECTOFF, /* type */
737 0, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_sectoff_reloc, /* special_function */
744 "R_PPC64_SECTOFF", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Like R_PPC64_SECTOFF, but no overflow warning. */
751 HOWTO (R_PPC64_SECTOFF_LO, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF_LO", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 16-bit upper half section relative relocation. */
766 HOWTO (R_PPC64_SECTOFF_HI, /* type */
767 16, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_signed, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_HI", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half adjusted section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HA, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_ha_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HA", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* Like R_PPC64_REL24 without touching the two least significant bits. */
796 HOWTO (R_PPC64_REL30, /* type */
797 2, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 30, /* bitsize */
800 TRUE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC64_REL30", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xfffffffc, /* dst_mask */
808 TRUE), /* pcrel_offset */
809
810 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
811
812 /* A standard 64-bit relocation. */
813 HOWTO (R_PPC64_ADDR64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_ADDR64", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* The bits 32-47 of an address. */
828 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
829 32, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR16_HIGHER", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address, plus 1 if the contents of the low
843 16 bits, treated as a signed number, is negative. */
844 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
845 32, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc64_elf_ha_reloc, /* special_function */
852 "R_PPC64_ADDR16_HIGHERA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* The bits 48-63 of an address. */
859 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
860 48, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHEST", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address, plus 1 if the contents of the low
874 16 bits, treated as a signed number, is negative. */
875 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
876 48, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_dont, /* complain_on_overflow */
882 ppc64_elf_ha_reloc, /* special_function */
883 "R_PPC64_ADDR16_HIGHESTA", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like ADDR64, but may be unaligned. */
890 HOWTO (R_PPC64_UADDR64, /* type */
891 0, /* rightshift */
892 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
893 64, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_PPC64_UADDR64", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 ONES (64), /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* 64-bit relative relocation. */
905 HOWTO (R_PPC64_REL64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 TRUE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_REL64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 TRUE), /* pcrel_offset */
918
919 /* 64-bit relocation to the symbol's procedure linkage table. */
920 HOWTO (R_PPC64_PLT64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc64_elf_unhandled_reloc, /* special_function */
928 "R_PPC64_PLT64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* 64-bit PC relative relocation to the symbol's procedure linkage
935 table. */
936 /* FIXME: R_PPC64_PLTREL64 not supported. */
937 HOWTO (R_PPC64_PLTREL64, /* type */
938 0, /* rightshift */
939 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
940 64, /* bitsize */
941 TRUE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_unhandled_reloc, /* special_function */
945 "R_PPC64_PLTREL64", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 ONES (64), /* dst_mask */
949 TRUE), /* pcrel_offset */
950
951 /* 16 bit TOC-relative relocation. */
952
953 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
954 HOWTO (R_PPC64_TOC16, /* type */
955 0, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_signed, /* complain_on_overflow */
961 ppc64_elf_toc_reloc, /* special_function */
962 "R_PPC64_TOC16", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 16 bit TOC-relative relocation without overflow. */
969
970 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_LO, /* type */
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_reloc, /* special_function */
979 "R_PPC64_TOC16_LO", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 16 bit TOC-relative relocation, high 16 bits. */
986
987 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
988 HOWTO (R_PPC64_TOC16_HI, /* type */
989 16, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc64_elf_toc_reloc, /* special_function */
996 "R_PPC64_TOC16_HI", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1003 contents of the low 16 bits, treated as a signed number, is
1004 negative. */
1005
1006 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1007 HOWTO (R_PPC64_TOC16_HA, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_toc_ha_reloc, /* special_function */
1015 "R_PPC64_TOC16_HA", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1022
1023 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1024 HOWTO (R_PPC64_TOC, /* type */
1025 0, /* rightshift */
1026 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1027 64, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_toc64_reloc, /* special_function */
1032 "R_PPC64_TOC", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 ONES (64), /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_GOT16, but also informs the link editor that the
1039 value to relocate may (!) refer to a PLT entry which the link
1040 editor (a) may replace with the symbol value. If the link editor
1041 is unable to fully resolve the symbol, it may (b) create a PLT
1042 entry and store the address to the new PLT entry in the GOT.
1043 This permits lazy resolution of function symbols at run time.
1044 The link editor may also skip all of this and just (c) emit a
1045 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1046 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1047 HOWTO (R_PPC64_PLTGOT16, /* type */
1048 0, /* rightshift */
1049 1, /* size (0 = byte, 1 = short, 2 = long) */
1050 16, /* bitsize */
1051 FALSE, /* pc_relative */
1052 0, /* bitpos */
1053 complain_overflow_signed, /* complain_on_overflow */
1054 ppc64_elf_unhandled_reloc, /* special_function */
1055 "R_PPC64_PLTGOT16", /* name */
1056 FALSE, /* partial_inplace */
1057 0, /* src_mask */
1058 0xffff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1060
1061 /* Like R_PPC64_PLTGOT16, but without overflow. */
1062 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1063 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc64_elf_unhandled_reloc, /* special_function */
1071 "R_PPC64_PLTGOT16_LO", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1078 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1079 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_signed, /* complain_on_overflow */
1086 ppc64_elf_unhandled_reloc, /* special_function */
1087 "R_PPC64_PLTGOT16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1094 1 if the contents of the low 16 bits, treated as a signed number,
1095 is negative. */
1096 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1097 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1098 16, /* rightshift */
1099 1, /* size (0 = byte, 1 = short, 2 = long) */
1100 16, /* bitsize */
1101 FALSE, /* pc_relative */
1102 0, /* bitpos */
1103 complain_overflow_signed, /* complain_on_overflow */
1104 ppc64_elf_unhandled_reloc, /* special_function */
1105 "R_PPC64_PLTGOT16_HA", /* name */
1106 FALSE, /* partial_inplace */
1107 0, /* src_mask */
1108 0xffff, /* dst_mask */
1109 FALSE), /* pcrel_offset */
1110
1111 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1112 HOWTO (R_PPC64_ADDR16_DS, /* type */
1113 0, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 bfd_elf_generic_reloc, /* special_function */
1120 "R_PPC64_ADDR16_DS", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xfffc, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_dont,/* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_LO_DS",/* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_GOT16_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_signed, /* complain_on_overflow */
1149 ppc64_elf_unhandled_reloc, /* special_function */
1150 "R_PPC64_GOT16_DS", /* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_LO_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_PLT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_signed, /* complain_on_overflow */
1194 ppc64_elf_sectoff_reloc, /* special_function */
1195 "R_PPC64_SECTOFF_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_LO_DS",/* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_TOC16_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_signed, /* complain_on_overflow */
1224 ppc64_elf_toc_reloc, /* special_function */
1225 "R_PPC64_TOC16_DS", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_dont, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_LO_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1247 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1248 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_signed, /* complain_on_overflow */
1255 ppc64_elf_unhandled_reloc, /* special_function */
1256 "R_PPC64_PLTGOT16_DS", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xfffc, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1263 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1264 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont, /* complain_on_overflow */
1271 ppc64_elf_unhandled_reloc, /* special_function */
1272 "R_PPC64_PLTGOT16_LO_DS",/* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xfffc, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* Marker relocs for TLS. */
1279 HOWTO (R_PPC64_TLS,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLS", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TLSGD,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TLSGD", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 HOWTO (R_PPC64_TLSLD,
1308 0, /* rightshift */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 32, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1315 "R_PPC64_TLSLD", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 HOWTO (R_PPC64_TOCSAVE,
1322 0, /* rightshift */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 32, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 bfd_elf_generic_reloc, /* special_function */
1329 "R_PPC64_TOCSAVE", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 /* Computes the load module index of the load module that contains the
1336 definition of its TLS sym. */
1337 HOWTO (R_PPC64_DTPMOD64,
1338 0, /* rightshift */
1339 4, /* size (0 = byte, 1 = short, 2 = long) */
1340 64, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc64_elf_unhandled_reloc, /* special_function */
1345 "R_PPC64_DTPMOD64", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 ONES (64), /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Computes a dtv-relative displacement, the difference between the value
1352 of sym+add and the base address of the thread-local storage block that
1353 contains the definition of sym, minus 0x8000. */
1354 HOWTO (R_PPC64_DTPREL64,
1355 0, /* rightshift */
1356 4, /* size (0 = byte, 1 = short, 2 = long) */
1357 64, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPREL64", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 ONES (64), /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* A 16 bit dtprel reloc. */
1369 HOWTO (R_PPC64_DTPREL16,
1370 0, /* rightshift */
1371 1, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_signed, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL16", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Like DTPREL16, but no overflow. */
1384 HOWTO (R_PPC64_DTPREL16_LO,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_dont, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16_LO", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1399 HOWTO (R_PPC64_DTPREL16_HI,
1400 16, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_signed, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_HI", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HA,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HA", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HIGHER,
1430 32, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_dont, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HIGHER", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHERA", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1460 48, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHEST", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16, but for insns with a DS field. */
1489 HOWTO (R_PPC64_DTPREL16_DS,
1490 0, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_signed, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_DS", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xfffc, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16_DS, but no overflow. */
1504 HOWTO (R_PPC64_DTPREL16_LO_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_dont, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_LO_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Computes a tp-relative displacement, the difference between the value of
1519 sym+add and the value of the thread pointer (r13). */
1520 HOWTO (R_PPC64_TPREL64,
1521 0, /* rightshift */
1522 4, /* size (0 = byte, 1 = short, 2 = long) */
1523 64, /* bitsize */
1524 FALSE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 ppc64_elf_unhandled_reloc, /* special_function */
1528 "R_PPC64_TPREL64", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 ONES (64), /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* A 16 bit tprel reloc. */
1535 HOWTO (R_PPC64_TPREL16,
1536 0, /* rightshift */
1537 1, /* size (0 = byte, 1 = short, 2 = long) */
1538 16, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_signed, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL16", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0xffff, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* Like TPREL16, but no overflow. */
1550 HOWTO (R_PPC64_TPREL16_LO,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16_LO", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16_LO, but next higher group of 16 bits. */
1565 HOWTO (R_PPC64_TPREL16_HI,
1566 16, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_signed, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_HI", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_HI, but adjust for low 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HA,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HA", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but next higher group of 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HIGHER,
1596 32, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_dont, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HIGHER", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHERA,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHERA", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHEST,
1626 48, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHEST", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHESTA", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16, but for insns with a DS field. */
1655 HOWTO (R_PPC64_TPREL16_DS,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_signed, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_DS", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xfffc, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16_DS, but no overflow. */
1670 HOWTO (R_PPC64_TPREL16_LO_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_LO_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1685 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1686 to the first entry relative to the TOC base (r2). */
1687 HOWTO (R_PPC64_GOT_TLSGD16,
1688 0, /* rightshift */
1689 1, /* size (0 = byte, 1 = short, 2 = long) */
1690 16, /* bitsize */
1691 FALSE, /* pc_relative */
1692 0, /* bitpos */
1693 complain_overflow_signed, /* complain_on_overflow */
1694 ppc64_elf_unhandled_reloc, /* special_function */
1695 "R_PPC64_GOT_TLSGD16", /* name */
1696 FALSE, /* partial_inplace */
1697 0, /* src_mask */
1698 0xffff, /* dst_mask */
1699 FALSE), /* pcrel_offset */
1700
1701 /* Like GOT_TLSGD16, but no overflow. */
1702 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_dont, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16_LO", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1718 16, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_signed, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_HI", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HA", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1747 with values (sym+add)@dtpmod and zero, and computes the offset to the
1748 first entry relative to the TOC base (r2). */
1749 HOWTO (R_PPC64_GOT_TLSLD16,
1750 0, /* rightshift */
1751 1, /* size (0 = byte, 1 = short, 2 = long) */
1752 16, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_signed, /* complain_on_overflow */
1756 ppc64_elf_unhandled_reloc, /* special_function */
1757 "R_PPC64_GOT_TLSLD16", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0xffff, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* Like GOT_TLSLD16, but no overflow. */
1764 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16_LO", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1780 16, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_HI", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HA", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1809 the offset to the entry relative to the TOC base (r2). */
1810 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc64_elf_unhandled_reloc, /* special_function */
1818 "R_PPC64_GOT_DTPREL16_DS", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xfffc, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823
1824 /* Like GOT_DTPREL16_DS, but no overflow. */
1825 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_dont, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1841 16, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_signed, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_HI", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xffff, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HA", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1870 offset to the entry relative to the TOC base (r2). */
1871 HOWTO (R_PPC64_GOT_TPREL16_DS,
1872 0, /* rightshift */
1873 1, /* size (0 = byte, 1 = short, 2 = long) */
1874 16, /* bitsize */
1875 FALSE, /* pc_relative */
1876 0, /* bitpos */
1877 complain_overflow_signed, /* complain_on_overflow */
1878 ppc64_elf_unhandled_reloc, /* special_function */
1879 "R_PPC64_GOT_TPREL16_DS", /* name */
1880 FALSE, /* partial_inplace */
1881 0, /* src_mask */
1882 0xfffc, /* dst_mask */
1883 FALSE), /* pcrel_offset */
1884
1885 /* Like GOT_TPREL16_DS, but no overflow. */
1886 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_dont, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1901 HOWTO (R_PPC64_GOT_TPREL16_HI,
1902 16, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_signed, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_HI", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xffff, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HA,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HA", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 HOWTO (R_PPC64_JMP_IREL, /* type */
1931 0, /* rightshift */
1932 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1933 0, /* bitsize */
1934 FALSE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_dont, /* complain_on_overflow */
1937 ppc64_elf_unhandled_reloc, /* special_function */
1938 "R_PPC64_JMP_IREL", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0, /* dst_mask */
1942 FALSE), /* pcrel_offset */
1943
1944 HOWTO (R_PPC64_IRELATIVE, /* type */
1945 0, /* rightshift */
1946 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1947 64, /* bitsize */
1948 FALSE, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_dont, /* complain_on_overflow */
1951 bfd_elf_generic_reloc, /* special_function */
1952 "R_PPC64_IRELATIVE", /* name */
1953 FALSE, /* partial_inplace */
1954 0, /* src_mask */
1955 ONES (64), /* dst_mask */
1956 FALSE), /* pcrel_offset */
1957
1958 /* A 16 bit relative relocation. */
1959 HOWTO (R_PPC64_REL16, /* type */
1960 0, /* rightshift */
1961 1, /* size (0 = byte, 1 = short, 2 = long) */
1962 16, /* bitsize */
1963 TRUE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_signed, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_REL16", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 0xffff, /* dst_mask */
1971 TRUE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation without overflow. */
1974 HOWTO (R_PPC64_REL16_LO, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_dont,/* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16_LO", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* The high order 16 bits of a relative address. */
1989 HOWTO (R_PPC64_REL16_HI, /* type */
1990 16, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_signed, /* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_HI", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address, plus 1 if the contents of
2004 the low 16 bits, treated as a signed number, is negative. */
2005 HOWTO (R_PPC64_REL16_HA, /* type */
2006 16, /* rightshift */
2007 1, /* size (0 = byte, 1 = short, 2 = long) */
2008 16, /* bitsize */
2009 TRUE, /* pc_relative */
2010 0, /* bitpos */
2011 complain_overflow_signed, /* complain_on_overflow */
2012 ppc64_elf_ha_reloc, /* special_function */
2013 "R_PPC64_REL16_HA", /* name */
2014 FALSE, /* partial_inplace */
2015 0, /* src_mask */
2016 0xffff, /* dst_mask */
2017 TRUE), /* pcrel_offset */
2018
2019 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2020 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 FALSE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_dont, /* complain_on_overflow */
2027 bfd_elf_generic_reloc, /* special_function */
2028 "R_PPC64_ADDR16_HIGH", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 FALSE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2035 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2036 16, /* rightshift */
2037 1, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 FALSE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_dont, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_ADDR16_HIGHA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0xffff, /* dst_mask */
2047 FALSE), /* pcrel_offset */
2048
2049 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2050 HOWTO (R_PPC64_DTPREL16_HIGH,
2051 16, /* rightshift */
2052 1, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_dont, /* complain_on_overflow */
2057 ppc64_elf_unhandled_reloc, /* special_function */
2058 "R_PPC64_DTPREL16_HIGH", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0xffff, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2065 HOWTO (R_PPC64_DTPREL16_HIGHA,
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 ppc64_elf_unhandled_reloc, /* special_function */
2073 "R_PPC64_DTPREL16_HIGHA", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2080 HOWTO (R_PPC64_TPREL16_HIGH,
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_unhandled_reloc, /* special_function */
2088 "R_PPC64_TPREL16_HIGH", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2095 HOWTO (R_PPC64_TPREL16_HIGHA,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_TPREL16_HIGHA", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like ADDR64, but use local entry point of function. */
2110 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2111 0, /* rightshift */
2112 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2113 64, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 bfd_elf_generic_reloc, /* special_function */
2118 "R_PPC64_ADDR64_LOCAL", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 ONES (64), /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* GNU extension to record C++ vtable hierarchy. */
2125 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2126 0, /* rightshift */
2127 0, /* size (0 = byte, 1 = short, 2 = long) */
2128 0, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 NULL, /* special_function */
2133 "R_PPC64_GNU_VTINHERIT", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* GNU extension to record C++ vtable member usage. */
2140 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2141 0, /* rightshift */
2142 0, /* size (0 = byte, 1 = short, 2 = long) */
2143 0, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 NULL, /* special_function */
2148 "R_PPC64_GNU_VTENTRY", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153 };
2154
2155 \f
2156 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2157 be done. */
2158
2159 static void
2160 ppc_howto_init (void)
2161 {
2162 unsigned int i, type;
2163
2164 for (i = 0;
2165 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2166 i++)
2167 {
2168 type = ppc64_elf_howto_raw[i].type;
2169 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2170 / sizeof (ppc64_elf_howto_table[0])));
2171 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2172 }
2173 }
2174
2175 static reloc_howto_type *
2176 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2177 bfd_reloc_code_real_type code)
2178 {
2179 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2180
2181 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2182 /* Initialize howto table if needed. */
2183 ppc_howto_init ();
2184
2185 switch (code)
2186 {
2187 default:
2188 return NULL;
2189
2190 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2191 break;
2192 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2193 break;
2194 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2195 break;
2196 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2197 break;
2198 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2199 break;
2200 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2201 break;
2202 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2203 break;
2204 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2205 break;
2206 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2207 break;
2208 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2209 break;
2210 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2211 break;
2212 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2213 break;
2214 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2215 break;
2216 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2217 break;
2218 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2219 break;
2220 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2221 break;
2222 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2223 break;
2224 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2225 break;
2226 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2227 break;
2228 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2229 break;
2230 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2231 break;
2232 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2233 break;
2234 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2235 break;
2236 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2237 break;
2238 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2239 break;
2240 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2241 break;
2242 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2243 break;
2244 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2245 break;
2246 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2247 break;
2248 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2249 break;
2250 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2251 break;
2252 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2253 break;
2254 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2255 break;
2256 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2257 break;
2258 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2259 break;
2260 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2261 break;
2262 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2263 break;
2264 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2265 break;
2266 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2267 break;
2268 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2269 break;
2270 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2271 break;
2272 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2273 break;
2274 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2275 break;
2276 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2277 break;
2278 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2279 break;
2280 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2281 break;
2282 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2283 break;
2284 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2285 break;
2286 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2287 break;
2288 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2289 break;
2290 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2291 break;
2292 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2293 break;
2294 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2295 break;
2296 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2297 break;
2298 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2299 break;
2300 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2301 break;
2302 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2303 break;
2304 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2305 break;
2306 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2307 break;
2308 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2309 break;
2310 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2311 break;
2312 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2313 break;
2314 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2315 break;
2316 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2317 break;
2318 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2319 break;
2320 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2321 break;
2322 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2323 break;
2324 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2325 break;
2326 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2327 break;
2328 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2329 break;
2330 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2331 break;
2332 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2333 break;
2334 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2335 break;
2336 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2337 break;
2338 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2339 break;
2340 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2341 break;
2342 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2343 break;
2344 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2345 break;
2346 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2347 break;
2348 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2349 break;
2350 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2351 break;
2352 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2353 break;
2354 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2355 break;
2356 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2357 break;
2358 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2359 break;
2360 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2361 break;
2362 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2363 break;
2364 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2365 break;
2366 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2367 break;
2368 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2369 break;
2370 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2371 break;
2372 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2373 break;
2374 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2375 break;
2376 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2377 break;
2378 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2379 break;
2380 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2381 break;
2382 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2383 break;
2384 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2385 break;
2386 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2389 break;
2390 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2391 break;
2392 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2393 break;
2394 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2395 break;
2396 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2397 break;
2398 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2399 break;
2400 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2403 break;
2404 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2405 break;
2406 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2407 break;
2408 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2409 break;
2410 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2411 break;
2412 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2413 break;
2414 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2415 break;
2416 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2417 break;
2418 }
2419
2420 return ppc64_elf_howto_table[r];
2421 };
2422
2423 static reloc_howto_type *
2424 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2425 const char *r_name)
2426 {
2427 unsigned int i;
2428
2429 for (i = 0;
2430 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2431 i++)
2432 if (ppc64_elf_howto_raw[i].name != NULL
2433 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2434 return &ppc64_elf_howto_raw[i];
2435
2436 return NULL;
2437 }
2438
2439 /* Set the howto pointer for a PowerPC ELF reloc. */
2440
2441 static void
2442 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2443 Elf_Internal_Rela *dst)
2444 {
2445 unsigned int type;
2446
2447 /* Initialize howto table if needed. */
2448 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2449 ppc_howto_init ();
2450
2451 type = ELF64_R_TYPE (dst->r_info);
2452 if (type >= (sizeof (ppc64_elf_howto_table)
2453 / sizeof (ppc64_elf_howto_table[0])))
2454 {
2455 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2456 abfd, (int) type);
2457 type = R_PPC64_NONE;
2458 }
2459 cache_ptr->howto = ppc64_elf_howto_table[type];
2460 }
2461
2462 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2463
2464 static bfd_reloc_status_type
2465 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2466 void *data, asection *input_section,
2467 bfd *output_bfd, char **error_message)
2468 {
2469 /* If this is a relocatable link (output_bfd test tells us), just
2470 call the generic function. Any adjustment will be done at final
2471 link time. */
2472 if (output_bfd != NULL)
2473 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2474 input_section, output_bfd, error_message);
2475
2476 /* Adjust the addend for sign extension of the low 16 bits.
2477 We won't actually be using the low 16 bits, so trashing them
2478 doesn't matter. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 if (output_bfd != NULL)
2489 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2490 input_section, output_bfd, error_message);
2491
2492 if (strcmp (symbol->section->name, ".opd") == 0
2493 && (symbol->section->owner->flags & DYNAMIC) == 0)
2494 {
2495 bfd_vma dest = opd_entry_value (symbol->section,
2496 symbol->value + reloc_entry->addend,
2497 NULL, NULL, FALSE);
2498 if (dest != (bfd_vma) -1)
2499 reloc_entry->addend = dest - (symbol->value
2500 + symbol->section->output_section->vma
2501 + symbol->section->output_offset);
2502 }
2503 else
2504 {
2505 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2506
2507 if (symbol->section->owner != abfd
2508 && abiversion (symbol->section->owner) >= 2)
2509 {
2510 unsigned int i;
2511
2512 for (i = 0; i < symbol->section->owner->symcount; ++i)
2513 {
2514 asymbol *symdef = symbol->section->owner->outsymbols[i];
2515
2516 if (strcmp (symdef->name, symbol->name) == 0)
2517 {
2518 elfsym = (elf_symbol_type *) symdef;
2519 break;
2520 }
2521 }
2522 }
2523 reloc_entry->addend
2524 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2525 }
2526 return bfd_reloc_continue;
2527 }
2528
2529 static bfd_reloc_status_type
2530 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2531 void *data, asection *input_section,
2532 bfd *output_bfd, char **error_message)
2533 {
2534 long insn;
2535 enum elf_ppc64_reloc_type r_type;
2536 bfd_size_type octets;
2537 /* Assume 'at' branch hints. */
2538 bfd_boolean is_isa_v2 = TRUE;
2539
2540 /* If this is a relocatable link (output_bfd test tells us), just
2541 call the generic function. Any adjustment will be done at final
2542 link time. */
2543 if (output_bfd != NULL)
2544 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2545 input_section, output_bfd, error_message);
2546
2547 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2548 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2549 insn &= ~(0x01 << 21);
2550 r_type = reloc_entry->howto->type;
2551 if (r_type == R_PPC64_ADDR14_BRTAKEN
2552 || r_type == R_PPC64_REL14_BRTAKEN)
2553 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2554
2555 if (is_isa_v2)
2556 {
2557 /* Set 'a' bit. This is 0b00010 in BO field for branch
2558 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2559 for branch on CTR insns (BO == 1a00t or 1a01t). */
2560 if ((insn & (0x14 << 21)) == (0x04 << 21))
2561 insn |= 0x02 << 21;
2562 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2563 insn |= 0x08 << 21;
2564 else
2565 goto out;
2566 }
2567 else
2568 {
2569 bfd_vma target = 0;
2570 bfd_vma from;
2571
2572 if (!bfd_is_com_section (symbol->section))
2573 target = symbol->value;
2574 target += symbol->section->output_section->vma;
2575 target += symbol->section->output_offset;
2576 target += reloc_entry->addend;
2577
2578 from = (reloc_entry->address
2579 + input_section->output_offset
2580 + input_section->output_section->vma);
2581
2582 /* Invert 'y' bit if not the default. */
2583 if ((bfd_signed_vma) (target - from) < 0)
2584 insn ^= 0x01 << 21;
2585 }
2586 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2587 out:
2588 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2589 input_section, output_bfd, error_message);
2590 }
2591
2592 static bfd_reloc_status_type
2593 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2594 void *data, asection *input_section,
2595 bfd *output_bfd, char **error_message)
2596 {
2597 /* If this is a relocatable link (output_bfd test tells us), just
2598 call the generic function. Any adjustment will be done at final
2599 link time. */
2600 if (output_bfd != NULL)
2601 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2602 input_section, output_bfd, error_message);
2603
2604 /* Subtract the symbol section base address. */
2605 reloc_entry->addend -= symbol->section->output_section->vma;
2606 return bfd_reloc_continue;
2607 }
2608
2609 static bfd_reloc_status_type
2610 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2611 void *data, asection *input_section,
2612 bfd *output_bfd, char **error_message)
2613 {
2614 /* If this is a relocatable link (output_bfd test tells us), just
2615 call the generic function. Any adjustment will be done at final
2616 link time. */
2617 if (output_bfd != NULL)
2618 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2619 input_section, output_bfd, error_message);
2620
2621 /* Subtract the symbol section base address. */
2622 reloc_entry->addend -= symbol->section->output_section->vma;
2623
2624 /* Adjust the addend for sign extension of the low 16 bits. */
2625 reloc_entry->addend += 0x8000;
2626 return bfd_reloc_continue;
2627 }
2628
2629 static bfd_reloc_status_type
2630 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2631 void *data, asection *input_section,
2632 bfd *output_bfd, char **error_message)
2633 {
2634 bfd_vma TOCstart;
2635
2636 /* If this is a relocatable link (output_bfd test tells us), just
2637 call the generic function. Any adjustment will be done at final
2638 link time. */
2639 if (output_bfd != NULL)
2640 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2641 input_section, output_bfd, error_message);
2642
2643 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2644 if (TOCstart == 0)
2645 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2646
2647 /* Subtract the TOC base address. */
2648 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2649 return bfd_reloc_continue;
2650 }
2651
2652 static bfd_reloc_status_type
2653 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2654 void *data, asection *input_section,
2655 bfd *output_bfd, char **error_message)
2656 {
2657 bfd_vma TOCstart;
2658
2659 /* If this is a relocatable link (output_bfd test tells us), just
2660 call the generic function. Any adjustment will be done at final
2661 link time. */
2662 if (output_bfd != NULL)
2663 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2664 input_section, output_bfd, error_message);
2665
2666 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2667 if (TOCstart == 0)
2668 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2669
2670 /* Subtract the TOC base address. */
2671 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2672
2673 /* Adjust the addend for sign extension of the low 16 bits. */
2674 reloc_entry->addend += 0x8000;
2675 return bfd_reloc_continue;
2676 }
2677
2678 static bfd_reloc_status_type
2679 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2680 void *data, asection *input_section,
2681 bfd *output_bfd, char **error_message)
2682 {
2683 bfd_vma TOCstart;
2684 bfd_size_type octets;
2685
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2694 if (TOCstart == 0)
2695 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2696
2697 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2698 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2699 return bfd_reloc_ok;
2700 }
2701
2702 static bfd_reloc_status_type
2703 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2704 void *data, asection *input_section,
2705 bfd *output_bfd, char **error_message)
2706 {
2707 /* If this is a relocatable link (output_bfd test tells us), just
2708 call the generic function. Any adjustment will be done at final
2709 link time. */
2710 if (output_bfd != NULL)
2711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2712 input_section, output_bfd, error_message);
2713
2714 if (error_message != NULL)
2715 {
2716 static char buf[60];
2717 sprintf (buf, "generic linker can't handle %s",
2718 reloc_entry->howto->name);
2719 *error_message = buf;
2720 }
2721 return bfd_reloc_dangerous;
2722 }
2723
2724 /* Track GOT entries needed for a given symbol. We might need more
2725 than one got entry per symbol. */
2726 struct got_entry
2727 {
2728 struct got_entry *next;
2729
2730 /* The symbol addend that we'll be placing in the GOT. */
2731 bfd_vma addend;
2732
2733 /* Unlike other ELF targets, we use separate GOT entries for the same
2734 symbol referenced from different input files. This is to support
2735 automatic multiple TOC/GOT sections, where the TOC base can vary
2736 from one input file to another. After partitioning into TOC groups
2737 we merge entries within the group.
2738
2739 Point to the BFD owning this GOT entry. */
2740 bfd *owner;
2741
2742 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2743 TLS_TPREL or TLS_DTPREL for tls entries. */
2744 unsigned char tls_type;
2745
2746 /* Non-zero if got.ent points to real entry. */
2747 unsigned char is_indirect;
2748
2749 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2750 union
2751 {
2752 bfd_signed_vma refcount;
2753 bfd_vma offset;
2754 struct got_entry *ent;
2755 } got;
2756 };
2757
2758 /* The same for PLT. */
2759 struct plt_entry
2760 {
2761 struct plt_entry *next;
2762
2763 bfd_vma addend;
2764
2765 union
2766 {
2767 bfd_signed_vma refcount;
2768 bfd_vma offset;
2769 } plt;
2770 };
2771
2772 struct ppc64_elf_obj_tdata
2773 {
2774 struct elf_obj_tdata elf;
2775
2776 /* Shortcuts to dynamic linker sections. */
2777 asection *got;
2778 asection *relgot;
2779
2780 /* Used during garbage collection. We attach global symbols defined
2781 on removed .opd entries to this section so that the sym is removed. */
2782 asection *deleted_section;
2783
2784 /* TLS local dynamic got entry handling. Support for multiple GOT
2785 sections means we potentially need one of these for each input bfd. */
2786 struct got_entry tlsld_got;
2787
2788 union {
2789 /* A copy of relocs before they are modified for --emit-relocs. */
2790 Elf_Internal_Rela *relocs;
2791
2792 /* Section contents. */
2793 bfd_byte *contents;
2794 } opd;
2795
2796 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2797 the reloc to be in the range -32768 to 32767. */
2798 unsigned int has_small_toc_reloc : 1;
2799
2800 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2801 instruction not one we handle. */
2802 unsigned int unexpected_toc_insn : 1;
2803 };
2804
2805 #define ppc64_elf_tdata(bfd) \
2806 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2807
2808 #define ppc64_tlsld_got(bfd) \
2809 (&ppc64_elf_tdata (bfd)->tlsld_got)
2810
2811 #define is_ppc64_elf(bfd) \
2812 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2813 && elf_object_id (bfd) == PPC64_ELF_DATA)
2814
2815 /* Override the generic function because we store some extras. */
2816
2817 static bfd_boolean
2818 ppc64_elf_mkobject (bfd *abfd)
2819 {
2820 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2821 PPC64_ELF_DATA);
2822 }
2823
2824 /* Fix bad default arch selected for a 64 bit input bfd when the
2825 default is 32 bit. */
2826
2827 static bfd_boolean
2828 ppc64_elf_object_p (bfd *abfd)
2829 {
2830 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2831 {
2832 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2833
2834 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2835 {
2836 /* Relies on arch after 32 bit default being 64 bit default. */
2837 abfd->arch_info = abfd->arch_info->next;
2838 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2839 }
2840 }
2841 return TRUE;
2842 }
2843
2844 /* Support for core dump NOTE sections. */
2845
2846 static bfd_boolean
2847 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2848 {
2849 size_t offset, size;
2850
2851 if (note->descsz != 504)
2852 return FALSE;
2853
2854 /* pr_cursig */
2855 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2856
2857 /* pr_pid */
2858 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2859
2860 /* pr_reg */
2861 offset = 112;
2862 size = 384;
2863
2864 /* Make a ".reg/999" section. */
2865 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2866 size, note->descpos + offset);
2867 }
2868
2869 static bfd_boolean
2870 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2871 {
2872 if (note->descsz != 136)
2873 return FALSE;
2874
2875 elf_tdata (abfd)->core->pid
2876 = bfd_get_32 (abfd, note->descdata + 24);
2877 elf_tdata (abfd)->core->program
2878 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2879 elf_tdata (abfd)->core->command
2880 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2881
2882 return TRUE;
2883 }
2884
2885 static char *
2886 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2887 ...)
2888 {
2889 switch (note_type)
2890 {
2891 default:
2892 return NULL;
2893
2894 case NT_PRPSINFO:
2895 {
2896 char data[136];
2897 va_list ap;
2898
2899 va_start (ap, note_type);
2900 memset (data, 0, sizeof (data));
2901 strncpy (data + 40, va_arg (ap, const char *), 16);
2902 strncpy (data + 56, va_arg (ap, const char *), 80);
2903 va_end (ap);
2904 return elfcore_write_note (abfd, buf, bufsiz,
2905 "CORE", note_type, data, sizeof (data));
2906 }
2907
2908 case NT_PRSTATUS:
2909 {
2910 char data[504];
2911 va_list ap;
2912 long pid;
2913 int cursig;
2914 const void *greg;
2915
2916 va_start (ap, note_type);
2917 memset (data, 0, 112);
2918 pid = va_arg (ap, long);
2919 bfd_put_32 (abfd, pid, data + 32);
2920 cursig = va_arg (ap, int);
2921 bfd_put_16 (abfd, cursig, data + 12);
2922 greg = va_arg (ap, const void *);
2923 memcpy (data + 112, greg, 384);
2924 memset (data + 496, 0, 8);
2925 va_end (ap);
2926 return elfcore_write_note (abfd, buf, bufsiz,
2927 "CORE", note_type, data, sizeof (data));
2928 }
2929 }
2930 }
2931
2932 /* Add extra PPC sections. */
2933
2934 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2935 {
2936 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2937 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2938 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2939 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2940 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2941 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2942 { NULL, 0, 0, 0, 0 }
2943 };
2944
2945 enum _ppc64_sec_type {
2946 sec_normal = 0,
2947 sec_opd = 1,
2948 sec_toc = 2
2949 };
2950
2951 struct _ppc64_elf_section_data
2952 {
2953 struct bfd_elf_section_data elf;
2954
2955 union
2956 {
2957 /* An array with one entry for each opd function descriptor,
2958 and some spares since opd entries may be either 16 or 24 bytes. */
2959 #define OPD_NDX(OFF) ((OFF) >> 4)
2960 struct _opd_sec_data
2961 {
2962 /* Points to the function code section for local opd entries. */
2963 asection **func_sec;
2964
2965 /* After editing .opd, adjust references to opd local syms. */
2966 long *adjust;
2967 } opd;
2968
2969 /* An array for toc sections, indexed by offset/8. */
2970 struct _toc_sec_data
2971 {
2972 /* Specifies the relocation symbol index used at a given toc offset. */
2973 unsigned *symndx;
2974
2975 /* And the relocation addend. */
2976 bfd_vma *add;
2977 } toc;
2978 } u;
2979
2980 enum _ppc64_sec_type sec_type:2;
2981
2982 /* Flag set when small branches are detected. Used to
2983 select suitable defaults for the stub group size. */
2984 unsigned int has_14bit_branch:1;
2985 };
2986
2987 #define ppc64_elf_section_data(sec) \
2988 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2989
2990 static bfd_boolean
2991 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2992 {
2993 if (!sec->used_by_bfd)
2994 {
2995 struct _ppc64_elf_section_data *sdata;
2996 bfd_size_type amt = sizeof (*sdata);
2997
2998 sdata = bfd_zalloc (abfd, amt);
2999 if (sdata == NULL)
3000 return FALSE;
3001 sec->used_by_bfd = sdata;
3002 }
3003
3004 return _bfd_elf_new_section_hook (abfd, sec);
3005 }
3006
3007 static struct _opd_sec_data *
3008 get_opd_info (asection * sec)
3009 {
3010 if (sec != NULL
3011 && ppc64_elf_section_data (sec) != NULL
3012 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3013 return &ppc64_elf_section_data (sec)->u.opd;
3014 return NULL;
3015 }
3016 \f
3017 /* Parameters for the qsort hook. */
3018 static bfd_boolean synthetic_relocatable;
3019
3020 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3021
3022 static int
3023 compare_symbols (const void *ap, const void *bp)
3024 {
3025 const asymbol *a = * (const asymbol **) ap;
3026 const asymbol *b = * (const asymbol **) bp;
3027
3028 /* Section symbols first. */
3029 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3030 return -1;
3031 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3032 return 1;
3033
3034 /* then .opd symbols. */
3035 if (strcmp (a->section->name, ".opd") == 0
3036 && strcmp (b->section->name, ".opd") != 0)
3037 return -1;
3038 if (strcmp (a->section->name, ".opd") != 0
3039 && strcmp (b->section->name, ".opd") == 0)
3040 return 1;
3041
3042 /* then other code symbols. */
3043 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3044 == (SEC_CODE | SEC_ALLOC)
3045 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3046 != (SEC_CODE | SEC_ALLOC))
3047 return -1;
3048
3049 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3050 != (SEC_CODE | SEC_ALLOC)
3051 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3052 == (SEC_CODE | SEC_ALLOC))
3053 return 1;
3054
3055 if (synthetic_relocatable)
3056 {
3057 if (a->section->id < b->section->id)
3058 return -1;
3059
3060 if (a->section->id > b->section->id)
3061 return 1;
3062 }
3063
3064 if (a->value + a->section->vma < b->value + b->section->vma)
3065 return -1;
3066
3067 if (a->value + a->section->vma > b->value + b->section->vma)
3068 return 1;
3069
3070 /* For syms with the same value, prefer strong dynamic global function
3071 syms over other syms. */
3072 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3073 return -1;
3074
3075 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3076 return 1;
3077
3078 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3079 return -1;
3080
3081 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3082 return 1;
3083
3084 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3085 return -1;
3086
3087 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3088 return 1;
3089
3090 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3091 return -1;
3092
3093 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3094 return 1;
3095
3096 return 0;
3097 }
3098
3099 /* Search SYMS for a symbol of the given VALUE. */
3100
3101 static asymbol *
3102 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3103 {
3104 long mid;
3105
3106 if (id == -1)
3107 {
3108 while (lo < hi)
3109 {
3110 mid = (lo + hi) >> 1;
3111 if (syms[mid]->value + syms[mid]->section->vma < value)
3112 lo = mid + 1;
3113 else if (syms[mid]->value + syms[mid]->section->vma > value)
3114 hi = mid;
3115 else
3116 return syms[mid];
3117 }
3118 }
3119 else
3120 {
3121 while (lo < hi)
3122 {
3123 mid = (lo + hi) >> 1;
3124 if (syms[mid]->section->id < id)
3125 lo = mid + 1;
3126 else if (syms[mid]->section->id > id)
3127 hi = mid;
3128 else if (syms[mid]->value < value)
3129 lo = mid + 1;
3130 else if (syms[mid]->value > value)
3131 hi = mid;
3132 else
3133 return syms[mid];
3134 }
3135 }
3136 return NULL;
3137 }
3138
3139 static bfd_boolean
3140 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3141 {
3142 bfd_vma vma = *(bfd_vma *) ptr;
3143 return ((section->flags & SEC_ALLOC) != 0
3144 && section->vma <= vma
3145 && vma < section->vma + section->size);
3146 }
3147
3148 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3149 entry syms. Also generate @plt symbols for the glink branch table.
3150 Returns count of synthetic symbols in RET or -1 on error. */
3151
3152 static long
3153 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3154 long static_count, asymbol **static_syms,
3155 long dyn_count, asymbol **dyn_syms,
3156 asymbol **ret)
3157 {
3158 asymbol *s;
3159 long i;
3160 long count;
3161 char *names;
3162 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3163 asection *opd = NULL;
3164 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3165 asymbol **syms;
3166 int abi = abiversion (abfd);
3167
3168 *ret = NULL;
3169
3170 if (abi < 2)
3171 {
3172 opd = bfd_get_section_by_name (abfd, ".opd");
3173 if (opd == NULL && abi == 1)
3174 return 0;
3175 }
3176
3177 symcount = static_count;
3178 if (!relocatable)
3179 symcount += dyn_count;
3180 if (symcount == 0)
3181 return 0;
3182
3183 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3184 if (syms == NULL)
3185 return -1;
3186
3187 if (!relocatable && static_count != 0 && dyn_count != 0)
3188 {
3189 /* Use both symbol tables. */
3190 memcpy (syms, static_syms, static_count * sizeof (*syms));
3191 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3192 }
3193 else if (!relocatable && static_count == 0)
3194 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3195 else
3196 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3197
3198 synthetic_relocatable = relocatable;
3199 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3200
3201 if (!relocatable && symcount > 1)
3202 {
3203 long j;
3204 /* Trim duplicate syms, since we may have merged the normal and
3205 dynamic symbols. Actually, we only care about syms that have
3206 different values, so trim any with the same value. */
3207 for (i = 1, j = 1; i < symcount; ++i)
3208 if (syms[i - 1]->value + syms[i - 1]->section->vma
3209 != syms[i]->value + syms[i]->section->vma)
3210 syms[j++] = syms[i];
3211 symcount = j;
3212 }
3213
3214 i = 0;
3215 if (strcmp (syms[i]->section->name, ".opd") == 0)
3216 ++i;
3217 codesecsym = i;
3218
3219 for (; i < symcount; ++i)
3220 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3221 != (SEC_CODE | SEC_ALLOC))
3222 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3223 break;
3224 codesecsymend = i;
3225
3226 for (; i < symcount; ++i)
3227 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3228 break;
3229 secsymend = i;
3230
3231 for (; i < symcount; ++i)
3232 if (strcmp (syms[i]->section->name, ".opd") != 0)
3233 break;
3234 opdsymend = i;
3235
3236 for (; i < symcount; ++i)
3237 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3238 != (SEC_CODE | SEC_ALLOC))
3239 break;
3240 symcount = i;
3241
3242 count = 0;
3243
3244 if (relocatable)
3245 {
3246 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3247 arelent *r;
3248 size_t size;
3249 long relcount;
3250
3251 if (opdsymend == secsymend)
3252 goto done;
3253
3254 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3255 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3256 if (relcount == 0)
3257 goto done;
3258
3259 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3260 {
3261 count = -1;
3262 goto done;
3263 }
3264
3265 size = 0;
3266 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3267 {
3268 asymbol *sym;
3269
3270 while (r < opd->relocation + relcount
3271 && r->address < syms[i]->value + opd->vma)
3272 ++r;
3273
3274 if (r == opd->relocation + relcount)
3275 break;
3276
3277 if (r->address != syms[i]->value + opd->vma)
3278 continue;
3279
3280 if (r->howto->type != R_PPC64_ADDR64)
3281 continue;
3282
3283 sym = *r->sym_ptr_ptr;
3284 if (!sym_exists_at (syms, opdsymend, symcount,
3285 sym->section->id, sym->value + r->addend))
3286 {
3287 ++count;
3288 size += sizeof (asymbol);
3289 size += strlen (syms[i]->name) + 2;
3290 }
3291 }
3292
3293 if (size == 0)
3294 goto done;
3295 s = *ret = bfd_malloc (size);
3296 if (s == NULL)
3297 {
3298 count = -1;
3299 goto done;
3300 }
3301
3302 names = (char *) (s + count);
3303
3304 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3305 {
3306 asymbol *sym;
3307
3308 while (r < opd->relocation + relcount
3309 && r->address < syms[i]->value + opd->vma)
3310 ++r;
3311
3312 if (r == opd->relocation + relcount)
3313 break;
3314
3315 if (r->address != syms[i]->value + opd->vma)
3316 continue;
3317
3318 if (r->howto->type != R_PPC64_ADDR64)
3319 continue;
3320
3321 sym = *r->sym_ptr_ptr;
3322 if (!sym_exists_at (syms, opdsymend, symcount,
3323 sym->section->id, sym->value + r->addend))
3324 {
3325 size_t len;
3326
3327 *s = *syms[i];
3328 s->flags |= BSF_SYNTHETIC;
3329 s->section = sym->section;
3330 s->value = sym->value + r->addend;
3331 s->name = names;
3332 *names++ = '.';
3333 len = strlen (syms[i]->name);
3334 memcpy (names, syms[i]->name, len + 1);
3335 names += len + 1;
3336 /* Have udata.p point back to the original symbol this
3337 synthetic symbol was derived from. */
3338 s->udata.p = syms[i];
3339 s++;
3340 }
3341 }
3342 }
3343 else
3344 {
3345 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3346 bfd_byte *contents = NULL;
3347 size_t size;
3348 long plt_count = 0;
3349 bfd_vma glink_vma = 0, resolv_vma = 0;
3350 asection *dynamic, *glink = NULL, *relplt = NULL;
3351 arelent *p;
3352
3353 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3354 {
3355 free_contents_and_exit_err:
3356 count = -1;
3357 free_contents_and_exit:
3358 if (contents)
3359 free (contents);
3360 goto done;
3361 }
3362
3363 size = 0;
3364 for (i = secsymend; i < opdsymend; ++i)
3365 {
3366 bfd_vma ent;
3367
3368 /* Ignore bogus symbols. */
3369 if (syms[i]->value > opd->size - 8)
3370 continue;
3371
3372 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3373 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3374 {
3375 ++count;
3376 size += sizeof (asymbol);
3377 size += strlen (syms[i]->name) + 2;
3378 }
3379 }
3380
3381 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3382 if (dyn_count != 0
3383 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3384 {
3385 bfd_byte *dynbuf, *extdyn, *extdynend;
3386 size_t extdynsize;
3387 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3388
3389 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3390 goto free_contents_and_exit_err;
3391
3392 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3393 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3394
3395 extdyn = dynbuf;
3396 extdynend = extdyn + dynamic->size;
3397 for (; extdyn < extdynend; extdyn += extdynsize)
3398 {
3399 Elf_Internal_Dyn dyn;
3400 (*swap_dyn_in) (abfd, extdyn, &dyn);
3401
3402 if (dyn.d_tag == DT_NULL)
3403 break;
3404
3405 if (dyn.d_tag == DT_PPC64_GLINK)
3406 {
3407 /* The first glink stub starts at offset 32; see
3408 comment in ppc64_elf_finish_dynamic_sections. */
3409 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3410 /* The .glink section usually does not survive the final
3411 link; search for the section (usually .text) where the
3412 glink stubs now reside. */
3413 glink = bfd_sections_find_if (abfd, section_covers_vma,
3414 &glink_vma);
3415 break;
3416 }
3417 }
3418
3419 free (dynbuf);
3420 }
3421
3422 if (glink != NULL)
3423 {
3424 /* Determine __glink trampoline by reading the relative branch
3425 from the first glink stub. */
3426 bfd_byte buf[4];
3427 unsigned int off = 0;
3428
3429 while (bfd_get_section_contents (abfd, glink, buf,
3430 glink_vma + off - glink->vma, 4))
3431 {
3432 unsigned int insn = bfd_get_32 (abfd, buf);
3433 insn ^= B_DOT;
3434 if ((insn & ~0x3fffffc) == 0)
3435 {
3436 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3437 break;
3438 }
3439 off += 4;
3440 if (off > 4)
3441 break;
3442 }
3443
3444 if (resolv_vma)
3445 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3446
3447 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3448 if (relplt != NULL)
3449 {
3450 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3451 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3452 goto free_contents_and_exit_err;
3453
3454 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3455 size += plt_count * sizeof (asymbol);
3456
3457 p = relplt->relocation;
3458 for (i = 0; i < plt_count; i++, p++)
3459 {
3460 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3461 if (p->addend != 0)
3462 size += sizeof ("+0x") - 1 + 16;
3463 }
3464 }
3465 }
3466
3467 if (size == 0)
3468 goto free_contents_and_exit;
3469 s = *ret = bfd_malloc (size);
3470 if (s == NULL)
3471 goto free_contents_and_exit_err;
3472
3473 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3474
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 if (syms[i]->value > opd->size - 8)
3480 continue;
3481
3482 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3483 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3484 {
3485 long lo, hi;
3486 size_t len;
3487 asection *sec = abfd->sections;
3488
3489 *s = *syms[i];
3490 lo = codesecsym;
3491 hi = codesecsymend;
3492 while (lo < hi)
3493 {
3494 long mid = (lo + hi) >> 1;
3495 if (syms[mid]->section->vma < ent)
3496 lo = mid + 1;
3497 else if (syms[mid]->section->vma > ent)
3498 hi = mid;
3499 else
3500 {
3501 sec = syms[mid]->section;
3502 break;
3503 }
3504 }
3505
3506 if (lo >= hi && lo > codesecsym)
3507 sec = syms[lo - 1]->section;
3508
3509 for (; sec != NULL; sec = sec->next)
3510 {
3511 if (sec->vma > ent)
3512 break;
3513 /* SEC_LOAD may not be set if SEC is from a separate debug
3514 info file. */
3515 if ((sec->flags & SEC_ALLOC) == 0)
3516 break;
3517 if ((sec->flags & SEC_CODE) != 0)
3518 s->section = sec;
3519 }
3520 s->flags |= BSF_SYNTHETIC;
3521 s->value = ent - s->section->vma;
3522 s->name = names;
3523 *names++ = '.';
3524 len = strlen (syms[i]->name);
3525 memcpy (names, syms[i]->name, len + 1);
3526 names += len + 1;
3527 /* Have udata.p point back to the original symbol this
3528 synthetic symbol was derived from. */
3529 s->udata.p = syms[i];
3530 s++;
3531 }
3532 }
3533 free (contents);
3534
3535 if (glink != NULL && relplt != NULL)
3536 {
3537 if (resolv_vma)
3538 {
3539 /* Add a symbol for the main glink trampoline. */
3540 memset (s, 0, sizeof *s);
3541 s->the_bfd = abfd;
3542 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3543 s->section = glink;
3544 s->value = resolv_vma - glink->vma;
3545 s->name = names;
3546 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3547 names += sizeof ("__glink_PLTresolve");
3548 s++;
3549 count++;
3550 }
3551
3552 /* FIXME: It would be very much nicer to put sym@plt on the
3553 stub rather than on the glink branch table entry. The
3554 objdump disassembler would then use a sensible symbol
3555 name on plt calls. The difficulty in doing so is
3556 a) finding the stubs, and,
3557 b) matching stubs against plt entries, and,
3558 c) there can be multiple stubs for a given plt entry.
3559
3560 Solving (a) could be done by code scanning, but older
3561 ppc64 binaries used different stubs to current code.
3562 (b) is the tricky one since you need to known the toc
3563 pointer for at least one function that uses a pic stub to
3564 be able to calculate the plt address referenced.
3565 (c) means gdb would need to set multiple breakpoints (or
3566 find the glink branch itself) when setting breakpoints
3567 for pending shared library loads. */
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size_t len;
3572
3573 *s = **p->sym_ptr_ptr;
3574 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3575 we are defining a symbol, ensure one of them is set. */
3576 if ((s->flags & BSF_LOCAL) == 0)
3577 s->flags |= BSF_GLOBAL;
3578 s->flags |= BSF_SYNTHETIC;
3579 s->section = glink;
3580 s->value = glink_vma - glink->vma;
3581 s->name = names;
3582 s->udata.p = NULL;
3583 len = strlen ((*p->sym_ptr_ptr)->name);
3584 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3585 names += len;
3586 if (p->addend != 0)
3587 {
3588 memcpy (names, "+0x", sizeof ("+0x") - 1);
3589 names += sizeof ("+0x") - 1;
3590 bfd_sprintf_vma (abfd, names, p->addend);
3591 names += strlen (names);
3592 }
3593 memcpy (names, "@plt", sizeof ("@plt"));
3594 names += sizeof ("@plt");
3595 s++;
3596 if (abi < 2)
3597 {
3598 glink_vma += 8;
3599 if (i >= 0x8000)
3600 glink_vma += 4;
3601 }
3602 else
3603 glink_vma += 4;
3604 }
3605 count += plt_count;
3606 }
3607 }
3608
3609 done:
3610 free (syms);
3611 return count;
3612 }
3613 \f
3614 /* The following functions are specific to the ELF linker, while
3615 functions above are used generally. Those named ppc64_elf_* are
3616 called by the main ELF linker code. They appear in this file more
3617 or less in the order in which they are called. eg.
3618 ppc64_elf_check_relocs is called early in the link process,
3619 ppc64_elf_finish_dynamic_sections is one of the last functions
3620 called.
3621
3622 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3623 functions have both a function code symbol and a function descriptor
3624 symbol. A call to foo in a relocatable object file looks like:
3625
3626 . .text
3627 . x:
3628 . bl .foo
3629 . nop
3630
3631 The function definition in another object file might be:
3632
3633 . .section .opd
3634 . foo: .quad .foo
3635 . .quad .TOC.@tocbase
3636 . .quad 0
3637 .
3638 . .text
3639 . .foo: blr
3640
3641 When the linker resolves the call during a static link, the branch
3642 unsurprisingly just goes to .foo and the .opd information is unused.
3643 If the function definition is in a shared library, things are a little
3644 different: The call goes via a plt call stub, the opd information gets
3645 copied to the plt, and the linker patches the nop.
3646
3647 . x:
3648 . bl .foo_stub
3649 . ld 2,40(1)
3650 .
3651 .
3652 . .foo_stub:
3653 . std 2,40(1) # in practice, the call stub
3654 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3655 . addi 11,11,Lfoo@toc@l # this is the general idea
3656 . ld 12,0(11)
3657 . ld 2,8(11)
3658 . mtctr 12
3659 . ld 11,16(11)
3660 . bctr
3661 .
3662 . .section .plt
3663 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3664
3665 The "reloc ()" notation is supposed to indicate that the linker emits
3666 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3667 copying.
3668
3669 What are the difficulties here? Well, firstly, the relocations
3670 examined by the linker in check_relocs are against the function code
3671 sym .foo, while the dynamic relocation in the plt is emitted against
3672 the function descriptor symbol, foo. Somewhere along the line, we need
3673 to carefully copy dynamic link information from one symbol to the other.
3674 Secondly, the generic part of the elf linker will make .foo a dynamic
3675 symbol as is normal for most other backends. We need foo dynamic
3676 instead, at least for an application final link. However, when
3677 creating a shared library containing foo, we need to have both symbols
3678 dynamic so that references to .foo are satisfied during the early
3679 stages of linking. Otherwise the linker might decide to pull in a
3680 definition from some other object, eg. a static library.
3681
3682 Update: As of August 2004, we support a new convention. Function
3683 calls may use the function descriptor symbol, ie. "bl foo". This
3684 behaves exactly as "bl .foo". */
3685
3686 /* Of those relocs that might be copied as dynamic relocs, this function
3687 selects those that must be copied when linking a shared library,
3688 even when the symbol is local. */
3689
3690 static int
3691 must_be_dyn_reloc (struct bfd_link_info *info,
3692 enum elf_ppc64_reloc_type r_type)
3693 {
3694 switch (r_type)
3695 {
3696 default:
3697 return 1;
3698
3699 case R_PPC64_REL32:
3700 case R_PPC64_REL64:
3701 case R_PPC64_REL30:
3702 return 0;
3703
3704 case R_PPC64_TPREL16:
3705 case R_PPC64_TPREL16_LO:
3706 case R_PPC64_TPREL16_HI:
3707 case R_PPC64_TPREL16_HA:
3708 case R_PPC64_TPREL16_DS:
3709 case R_PPC64_TPREL16_LO_DS:
3710 case R_PPC64_TPREL16_HIGH:
3711 case R_PPC64_TPREL16_HIGHA:
3712 case R_PPC64_TPREL16_HIGHER:
3713 case R_PPC64_TPREL16_HIGHERA:
3714 case R_PPC64_TPREL16_HIGHEST:
3715 case R_PPC64_TPREL16_HIGHESTA:
3716 case R_PPC64_TPREL64:
3717 return !info->executable;
3718 }
3719 }
3720
3721 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3722 copying dynamic variables from a shared lib into an app's dynbss
3723 section, and instead use a dynamic relocation to point into the
3724 shared lib. With code that gcc generates, it's vital that this be
3725 enabled; In the PowerPC64 ABI, the address of a function is actually
3726 the address of a function descriptor, which resides in the .opd
3727 section. gcc uses the descriptor directly rather than going via the
3728 GOT as some other ABI's do, which means that initialized function
3729 pointers must reference the descriptor. Thus, a function pointer
3730 initialized to the address of a function in a shared library will
3731 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3732 redefines the function descriptor symbol to point to the copy. This
3733 presents a problem as a plt entry for that function is also
3734 initialized from the function descriptor symbol and the copy reloc
3735 may not be initialized first. */
3736 #define ELIMINATE_COPY_RELOCS 1
3737
3738 /* Section name for stubs is the associated section name plus this
3739 string. */
3740 #define STUB_SUFFIX ".stub"
3741
3742 /* Linker stubs.
3743 ppc_stub_long_branch:
3744 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3745 destination, but a 24 bit branch in a stub section will reach.
3746 . b dest
3747
3748 ppc_stub_plt_branch:
3749 Similar to the above, but a 24 bit branch in the stub section won't
3750 reach its destination.
3751 . addis %r11,%r2,xxx@toc@ha
3752 . ld %r12,xxx@toc@l(%r11)
3753 . mtctr %r12
3754 . bctr
3755
3756 ppc_stub_plt_call:
3757 Used to call a function in a shared library. If it so happens that
3758 the plt entry referenced crosses a 64k boundary, then an extra
3759 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3760 . std %r2,40(%r1)
3761 . addis %r11,%r2,xxx@toc@ha
3762 . ld %r12,xxx+0@toc@l(%r11)
3763 . mtctr %r12
3764 . ld %r2,xxx+8@toc@l(%r11)
3765 . ld %r11,xxx+16@toc@l(%r11)
3766 . bctr
3767
3768 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3769 code to adjust the value and save r2 to support multiple toc sections.
3770 A ppc_stub_long_branch with an r2 offset looks like:
3771 . std %r2,40(%r1)
3772 . addis %r2,%r2,off@ha
3773 . addi %r2,%r2,off@l
3774 . b dest
3775
3776 A ppc_stub_plt_branch with an r2 offset looks like:
3777 . std %r2,40(%r1)
3778 . addis %r11,%r2,xxx@toc@ha
3779 . ld %r12,xxx@toc@l(%r11)
3780 . addis %r2,%r2,off@ha
3781 . addi %r2,%r2,off@l
3782 . mtctr %r12
3783 . bctr
3784
3785 In cases where the "addis" instruction would add zero, the "addis" is
3786 omitted and following instructions modified slightly in some cases.
3787 */
3788
3789 enum ppc_stub_type {
3790 ppc_stub_none,
3791 ppc_stub_long_branch,
3792 ppc_stub_long_branch_r2off,
3793 ppc_stub_plt_branch,
3794 ppc_stub_plt_branch_r2off,
3795 ppc_stub_plt_call,
3796 ppc_stub_plt_call_r2save,
3797 ppc_stub_global_entry
3798 };
3799
3800 struct ppc_stub_hash_entry {
3801
3802 /* Base hash table entry structure. */
3803 struct bfd_hash_entry root;
3804
3805 enum ppc_stub_type stub_type;
3806
3807 /* The stub section. */
3808 asection *stub_sec;
3809
3810 /* Offset within stub_sec of the beginning of this stub. */
3811 bfd_vma stub_offset;
3812
3813 /* Given the symbol's value and its section we can determine its final
3814 value when building the stubs (so the stub knows where to jump. */
3815 bfd_vma target_value;
3816 asection *target_section;
3817
3818 /* The symbol table entry, if any, that this was derived from. */
3819 struct ppc_link_hash_entry *h;
3820 struct plt_entry *plt_ent;
3821
3822 /* Where this stub is being called from, or, in the case of combined
3823 stub sections, the first input section in the group. */
3824 asection *id_sec;
3825
3826 /* Symbol st_other. */
3827 unsigned char other;
3828 };
3829
3830 struct ppc_branch_hash_entry {
3831
3832 /* Base hash table entry structure. */
3833 struct bfd_hash_entry root;
3834
3835 /* Offset within branch lookup table. */
3836 unsigned int offset;
3837
3838 /* Generation marker. */
3839 unsigned int iter;
3840 };
3841
3842 /* Used to track dynamic relocations for local symbols. */
3843 struct ppc_dyn_relocs
3844 {
3845 struct ppc_dyn_relocs *next;
3846
3847 /* The input section of the reloc. */
3848 asection *sec;
3849
3850 /* Total number of relocs copied for the input section. */
3851 unsigned int count : 31;
3852
3853 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3854 unsigned int ifunc : 1;
3855 };
3856
3857 struct ppc_link_hash_entry
3858 {
3859 struct elf_link_hash_entry elf;
3860
3861 union {
3862 /* A pointer to the most recently used stub hash entry against this
3863 symbol. */
3864 struct ppc_stub_hash_entry *stub_cache;
3865
3866 /* A pointer to the next symbol starting with a '.' */
3867 struct ppc_link_hash_entry *next_dot_sym;
3868 } u;
3869
3870 /* Track dynamic relocs copied for this symbol. */
3871 struct elf_dyn_relocs *dyn_relocs;
3872
3873 /* Link between function code and descriptor symbols. */
3874 struct ppc_link_hash_entry *oh;
3875
3876 /* Flag function code and descriptor symbols. */
3877 unsigned int is_func:1;
3878 unsigned int is_func_descriptor:1;
3879 unsigned int fake:1;
3880
3881 /* Whether global opd/toc sym has been adjusted or not.
3882 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3883 should be set for all globals defined in any opd/toc section. */
3884 unsigned int adjust_done:1;
3885
3886 /* Set if we twiddled this symbol to weak at some stage. */
3887 unsigned int was_undefined:1;
3888
3889 /* Contexts in which symbol is used in the GOT (or TOC).
3890 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3891 corresponding relocs are encountered during check_relocs.
3892 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3893 indicate the corresponding GOT entry type is not needed.
3894 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3895 a TPREL one. We use a separate flag rather than setting TPREL
3896 just for convenience in distinguishing the two cases. */
3897 #define TLS_GD 1 /* GD reloc. */
3898 #define TLS_LD 2 /* LD reloc. */
3899 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3900 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3901 #define TLS_TLS 16 /* Any TLS reloc. */
3902 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3903 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3904 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3905 unsigned char tls_mask;
3906 };
3907
3908 /* ppc64 ELF linker hash table. */
3909
3910 struct ppc_link_hash_table
3911 {
3912 struct elf_link_hash_table elf;
3913
3914 /* The stub hash table. */
3915 struct bfd_hash_table stub_hash_table;
3916
3917 /* Another hash table for plt_branch stubs. */
3918 struct bfd_hash_table branch_hash_table;
3919
3920 /* Hash table for function prologue tocsave. */
3921 htab_t tocsave_htab;
3922
3923 /* Various options and other info passed from the linker. */
3924 struct ppc64_elf_params *params;
3925
3926 /* Array to keep track of which stub sections have been created, and
3927 information on stub grouping. */
3928 struct map_stub {
3929 /* This is the section to which stubs in the group will be attached. */
3930 asection *link_sec;
3931 /* The stub section. */
3932 asection *stub_sec;
3933 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3934 bfd_vma toc_off;
3935 } *stub_group;
3936
3937 /* Temp used when calculating TOC pointers. */
3938 bfd_vma toc_curr;
3939 bfd *toc_bfd;
3940 asection *toc_first_sec;
3941
3942 /* Highest input section id. */
3943 int top_id;
3944
3945 /* Highest output section index. */
3946 int top_index;
3947
3948 /* Used when adding symbols. */
3949 struct ppc_link_hash_entry *dot_syms;
3950
3951 /* List of input sections for each output section. */
3952 asection **input_list;
3953
3954 /* Shortcuts to get to dynamic linker sections. */
3955 asection *dynbss;
3956 asection *relbss;
3957 asection *glink;
3958 asection *sfpr;
3959 asection *brlt;
3960 asection *relbrlt;
3961 asection *glink_eh_frame;
3962
3963 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3964 struct ppc_link_hash_entry *tls_get_addr;
3965 struct ppc_link_hash_entry *tls_get_addr_fd;
3966
3967 /* The size of reliplt used by got entry relocs. */
3968 bfd_size_type got_reli_size;
3969
3970 /* Statistics. */
3971 unsigned long stub_count[ppc_stub_global_entry];
3972
3973 /* Number of stubs against global syms. */
3974 unsigned long stub_globals;
3975
3976 /* Set if we're linking code with function descriptors. */
3977 unsigned int opd_abi:1;
3978
3979 /* Support for multiple toc sections. */
3980 unsigned int do_multi_toc:1;
3981 unsigned int multi_toc_needed:1;
3982 unsigned int second_toc_pass:1;
3983 unsigned int do_toc_opt:1;
3984
3985 /* Set on error. */
3986 unsigned int stub_error:1;
3987
3988 /* Temp used by ppc64_elf_before_check_relocs. */
3989 unsigned int twiddled_syms:1;
3990
3991 /* Incremented every time we size stubs. */
3992 unsigned int stub_iteration;
3993
3994 /* Small local sym cache. */
3995 struct sym_cache sym_cache;
3996 };
3997
3998 /* Rename some of the generic section flags to better document how they
3999 are used here. */
4000
4001 /* Nonzero if this section has TLS related relocations. */
4002 #define has_tls_reloc sec_flg0
4003
4004 /* Nonzero if this section has a call to __tls_get_addr. */
4005 #define has_tls_get_addr_call sec_flg1
4006
4007 /* Nonzero if this section has any toc or got relocs. */
4008 #define has_toc_reloc sec_flg2
4009
4010 /* Nonzero if this section has a call to another section that uses
4011 the toc or got. */
4012 #define makes_toc_func_call sec_flg3
4013
4014 /* Recursion protection when determining above flag. */
4015 #define call_check_in_progress sec_flg4
4016 #define call_check_done sec_flg5
4017
4018 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4019
4020 #define ppc_hash_table(p) \
4021 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4022 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4023
4024 #define ppc_stub_hash_lookup(table, string, create, copy) \
4025 ((struct ppc_stub_hash_entry *) \
4026 bfd_hash_lookup ((table), (string), (create), (copy)))
4027
4028 #define ppc_branch_hash_lookup(table, string, create, copy) \
4029 ((struct ppc_branch_hash_entry *) \
4030 bfd_hash_lookup ((table), (string), (create), (copy)))
4031
4032 /* Create an entry in the stub hash table. */
4033
4034 static struct bfd_hash_entry *
4035 stub_hash_newfunc (struct bfd_hash_entry *entry,
4036 struct bfd_hash_table *table,
4037 const char *string)
4038 {
4039 /* Allocate the structure if it has not already been allocated by a
4040 subclass. */
4041 if (entry == NULL)
4042 {
4043 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4044 if (entry == NULL)
4045 return entry;
4046 }
4047
4048 /* Call the allocation method of the superclass. */
4049 entry = bfd_hash_newfunc (entry, table, string);
4050 if (entry != NULL)
4051 {
4052 struct ppc_stub_hash_entry *eh;
4053
4054 /* Initialize the local fields. */
4055 eh = (struct ppc_stub_hash_entry *) entry;
4056 eh->stub_type = ppc_stub_none;
4057 eh->stub_sec = NULL;
4058 eh->stub_offset = 0;
4059 eh->target_value = 0;
4060 eh->target_section = NULL;
4061 eh->h = NULL;
4062 eh->plt_ent = NULL;
4063 eh->id_sec = NULL;
4064 eh->other = 0;
4065 }
4066
4067 return entry;
4068 }
4069
4070 /* Create an entry in the branch hash table. */
4071
4072 static struct bfd_hash_entry *
4073 branch_hash_newfunc (struct bfd_hash_entry *entry,
4074 struct bfd_hash_table *table,
4075 const char *string)
4076 {
4077 /* Allocate the structure if it has not already been allocated by a
4078 subclass. */
4079 if (entry == NULL)
4080 {
4081 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4082 if (entry == NULL)
4083 return entry;
4084 }
4085
4086 /* Call the allocation method of the superclass. */
4087 entry = bfd_hash_newfunc (entry, table, string);
4088 if (entry != NULL)
4089 {
4090 struct ppc_branch_hash_entry *eh;
4091
4092 /* Initialize the local fields. */
4093 eh = (struct ppc_branch_hash_entry *) entry;
4094 eh->offset = 0;
4095 eh->iter = 0;
4096 }
4097
4098 return entry;
4099 }
4100
4101 /* Create an entry in a ppc64 ELF linker hash table. */
4102
4103 static struct bfd_hash_entry *
4104 link_hash_newfunc (struct bfd_hash_entry *entry,
4105 struct bfd_hash_table *table,
4106 const char *string)
4107 {
4108 /* Allocate the structure if it has not already been allocated by a
4109 subclass. */
4110 if (entry == NULL)
4111 {
4112 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4113 if (entry == NULL)
4114 return entry;
4115 }
4116
4117 /* Call the allocation method of the superclass. */
4118 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4119 if (entry != NULL)
4120 {
4121 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4122
4123 memset (&eh->u.stub_cache, 0,
4124 (sizeof (struct ppc_link_hash_entry)
4125 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4126
4127 /* When making function calls, old ABI code references function entry
4128 points (dot symbols), while new ABI code references the function
4129 descriptor symbol. We need to make any combination of reference and
4130 definition work together, without breaking archive linking.
4131
4132 For a defined function "foo" and an undefined call to "bar":
4133 An old object defines "foo" and ".foo", references ".bar" (possibly
4134 "bar" too).
4135 A new object defines "foo" and references "bar".
4136
4137 A new object thus has no problem with its undefined symbols being
4138 satisfied by definitions in an old object. On the other hand, the
4139 old object won't have ".bar" satisfied by a new object.
4140
4141 Keep a list of newly added dot-symbols. */
4142
4143 if (string[0] == '.')
4144 {
4145 struct ppc_link_hash_table *htab;
4146
4147 htab = (struct ppc_link_hash_table *) table;
4148 eh->u.next_dot_sym = htab->dot_syms;
4149 htab->dot_syms = eh;
4150 }
4151 }
4152
4153 return entry;
4154 }
4155
4156 struct tocsave_entry {
4157 asection *sec;
4158 bfd_vma offset;
4159 };
4160
4161 static hashval_t
4162 tocsave_htab_hash (const void *p)
4163 {
4164 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4165 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4166 }
4167
4168 static int
4169 tocsave_htab_eq (const void *p1, const void *p2)
4170 {
4171 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4172 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4173 return e1->sec == e2->sec && e1->offset == e2->offset;
4174 }
4175
4176 /* Destroy a ppc64 ELF linker hash table. */
4177
4178 static void
4179 ppc64_elf_link_hash_table_free (bfd *obfd)
4180 {
4181 struct ppc_link_hash_table *htab;
4182
4183 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4184 if (htab->tocsave_htab)
4185 htab_delete (htab->tocsave_htab);
4186 bfd_hash_table_free (&htab->branch_hash_table);
4187 bfd_hash_table_free (&htab->stub_hash_table);
4188 _bfd_elf_link_hash_table_free (obfd);
4189 }
4190
4191 /* Create a ppc64 ELF linker hash table. */
4192
4193 static struct bfd_link_hash_table *
4194 ppc64_elf_link_hash_table_create (bfd *abfd)
4195 {
4196 struct ppc_link_hash_table *htab;
4197 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4198
4199 htab = bfd_zmalloc (amt);
4200 if (htab == NULL)
4201 return NULL;
4202
4203 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4204 sizeof (struct ppc_link_hash_entry),
4205 PPC64_ELF_DATA))
4206 {
4207 free (htab);
4208 return NULL;
4209 }
4210
4211 /* Init the stub hash table too. */
4212 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4213 sizeof (struct ppc_stub_hash_entry)))
4214 {
4215 _bfd_elf_link_hash_table_free (abfd);
4216 return NULL;
4217 }
4218
4219 /* And the branch hash table. */
4220 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4221 sizeof (struct ppc_branch_hash_entry)))
4222 {
4223 bfd_hash_table_free (&htab->stub_hash_table);
4224 _bfd_elf_link_hash_table_free (abfd);
4225 return NULL;
4226 }
4227
4228 htab->tocsave_htab = htab_try_create (1024,
4229 tocsave_htab_hash,
4230 tocsave_htab_eq,
4231 NULL);
4232 if (htab->tocsave_htab == NULL)
4233 {
4234 ppc64_elf_link_hash_table_free (abfd);
4235 return NULL;
4236 }
4237 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4238
4239 /* Initializing two fields of the union is just cosmetic. We really
4240 only care about glist, but when compiled on a 32-bit host the
4241 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4242 debugger inspection of these fields look nicer. */
4243 htab->elf.init_got_refcount.refcount = 0;
4244 htab->elf.init_got_refcount.glist = NULL;
4245 htab->elf.init_plt_refcount.refcount = 0;
4246 htab->elf.init_plt_refcount.glist = NULL;
4247 htab->elf.init_got_offset.offset = 0;
4248 htab->elf.init_got_offset.glist = NULL;
4249 htab->elf.init_plt_offset.offset = 0;
4250 htab->elf.init_plt_offset.glist = NULL;
4251
4252 return &htab->elf.root;
4253 }
4254
4255 /* Create sections for linker generated code. */
4256
4257 static bfd_boolean
4258 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4259 {
4260 struct ppc_link_hash_table *htab;
4261 flagword flags;
4262
4263 htab = ppc_hash_table (info);
4264
4265 /* Create .sfpr for code to save and restore fp regs. */
4266 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4267 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4268 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4269 flags);
4270 if (htab->sfpr == NULL
4271 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4272 return FALSE;
4273
4274 /* Create .glink for lazy dynamic linking support. */
4275 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4276 flags);
4277 if (htab->glink == NULL
4278 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4279 return FALSE;
4280
4281 if (!info->no_ld_generated_unwind_info)
4282 {
4283 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4284 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4285 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4286 ".eh_frame",
4287 flags);
4288 if (htab->glink_eh_frame == NULL
4289 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4290 return FALSE;
4291 }
4292
4293 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4294 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4295 if (htab->elf.iplt == NULL
4296 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4297 return FALSE;
4298
4299 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4300 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4301 htab->elf.irelplt
4302 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4303 if (htab->elf.irelplt == NULL
4304 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4305 return FALSE;
4306
4307 /* Create branch lookup table for plt_branch stubs. */
4308 flags = (SEC_ALLOC | SEC_LOAD
4309 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4310 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4311 flags);
4312 if (htab->brlt == NULL
4313 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4314 return FALSE;
4315
4316 if (!info->shared)
4317 return TRUE;
4318
4319 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4320 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4321 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4322 ".rela.branch_lt",
4323 flags);
4324 if (htab->relbrlt == NULL
4325 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4326 return FALSE;
4327
4328 return TRUE;
4329 }
4330
4331 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4332
4333 bfd_boolean
4334 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4335 struct ppc64_elf_params *params)
4336 {
4337 struct ppc_link_hash_table *htab;
4338
4339 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4340
4341 /* Always hook our dynamic sections into the first bfd, which is the
4342 linker created stub bfd. This ensures that the GOT header is at
4343 the start of the output TOC section. */
4344 htab = ppc_hash_table (info);
4345 if (htab == NULL)
4346 return FALSE;
4347 htab->elf.dynobj = params->stub_bfd;
4348 htab->params = params;
4349
4350 if (info->relocatable)
4351 return TRUE;
4352
4353 return create_linkage_sections (htab->elf.dynobj, info);
4354 }
4355
4356 /* Build a name for an entry in the stub hash table. */
4357
4358 static char *
4359 ppc_stub_name (const asection *input_section,
4360 const asection *sym_sec,
4361 const struct ppc_link_hash_entry *h,
4362 const Elf_Internal_Rela *rel)
4363 {
4364 char *stub_name;
4365 ssize_t len;
4366
4367 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4368 offsets from a sym as a branch target? In fact, we could
4369 probably assume the addend is always zero. */
4370 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4371
4372 if (h)
4373 {
4374 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4375 stub_name = bfd_malloc (len);
4376 if (stub_name == NULL)
4377 return stub_name;
4378
4379 len = sprintf (stub_name, "%08x.%s+%x",
4380 input_section->id & 0xffffffff,
4381 h->elf.root.root.string,
4382 (int) rel->r_addend & 0xffffffff);
4383 }
4384 else
4385 {
4386 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4387 stub_name = bfd_malloc (len);
4388 if (stub_name == NULL)
4389 return stub_name;
4390
4391 len = sprintf (stub_name, "%08x.%x:%x+%x",
4392 input_section->id & 0xffffffff,
4393 sym_sec->id & 0xffffffff,
4394 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4395 (int) rel->r_addend & 0xffffffff);
4396 }
4397 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4398 stub_name[len - 2] = 0;
4399 return stub_name;
4400 }
4401
4402 /* Look up an entry in the stub hash. Stub entries are cached because
4403 creating the stub name takes a bit of time. */
4404
4405 static struct ppc_stub_hash_entry *
4406 ppc_get_stub_entry (const asection *input_section,
4407 const asection *sym_sec,
4408 struct ppc_link_hash_entry *h,
4409 const Elf_Internal_Rela *rel,
4410 struct ppc_link_hash_table *htab)
4411 {
4412 struct ppc_stub_hash_entry *stub_entry;
4413 const asection *id_sec;
4414
4415 /* If this input section is part of a group of sections sharing one
4416 stub section, then use the id of the first section in the group.
4417 Stub names need to include a section id, as there may well be
4418 more than one stub used to reach say, printf, and we need to
4419 distinguish between them. */
4420 id_sec = htab->stub_group[input_section->id].link_sec;
4421
4422 if (h != NULL && h->u.stub_cache != NULL
4423 && h->u.stub_cache->h == h
4424 && h->u.stub_cache->id_sec == id_sec)
4425 {
4426 stub_entry = h->u.stub_cache;
4427 }
4428 else
4429 {
4430 char *stub_name;
4431
4432 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4433 if (stub_name == NULL)
4434 return NULL;
4435
4436 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4437 stub_name, FALSE, FALSE);
4438 if (h != NULL)
4439 h->u.stub_cache = stub_entry;
4440
4441 free (stub_name);
4442 }
4443
4444 return stub_entry;
4445 }
4446
4447 /* Add a new stub entry to the stub hash. Not all fields of the new
4448 stub entry are initialised. */
4449
4450 static struct ppc_stub_hash_entry *
4451 ppc_add_stub (const char *stub_name,
4452 asection *section,
4453 struct bfd_link_info *info)
4454 {
4455 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4456 asection *link_sec;
4457 asection *stub_sec;
4458 struct ppc_stub_hash_entry *stub_entry;
4459
4460 link_sec = htab->stub_group[section->id].link_sec;
4461 stub_sec = htab->stub_group[section->id].stub_sec;
4462 if (stub_sec == NULL)
4463 {
4464 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4465 if (stub_sec == NULL)
4466 {
4467 size_t namelen;
4468 bfd_size_type len;
4469 char *s_name;
4470
4471 namelen = strlen (link_sec->name);
4472 len = namelen + sizeof (STUB_SUFFIX);
4473 s_name = bfd_alloc (htab->params->stub_bfd, len);
4474 if (s_name == NULL)
4475 return NULL;
4476
4477 memcpy (s_name, link_sec->name, namelen);
4478 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4479 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4480 if (stub_sec == NULL)
4481 return NULL;
4482 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4483 }
4484 htab->stub_group[section->id].stub_sec = stub_sec;
4485 }
4486
4487 /* Enter this entry into the linker stub hash table. */
4488 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4489 TRUE, FALSE);
4490 if (stub_entry == NULL)
4491 {
4492 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4493 section->owner, stub_name);
4494 return NULL;
4495 }
4496
4497 stub_entry->stub_sec = stub_sec;
4498 stub_entry->stub_offset = 0;
4499 stub_entry->id_sec = link_sec;
4500 return stub_entry;
4501 }
4502
4503 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4504 not already done. */
4505
4506 static bfd_boolean
4507 create_got_section (bfd *abfd, struct bfd_link_info *info)
4508 {
4509 asection *got, *relgot;
4510 flagword flags;
4511 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4512
4513 if (!is_ppc64_elf (abfd))
4514 return FALSE;
4515 if (htab == NULL)
4516 return FALSE;
4517
4518 if (!htab->elf.sgot
4519 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4520 return FALSE;
4521
4522 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4523 | SEC_LINKER_CREATED);
4524
4525 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4526 if (!got
4527 || !bfd_set_section_alignment (abfd, got, 3))
4528 return FALSE;
4529
4530 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4531 flags | SEC_READONLY);
4532 if (!relgot
4533 || ! bfd_set_section_alignment (abfd, relgot, 3))
4534 return FALSE;
4535
4536 ppc64_elf_tdata (abfd)->got = got;
4537 ppc64_elf_tdata (abfd)->relgot = relgot;
4538 return TRUE;
4539 }
4540
4541 /* Create the dynamic sections, and set up shortcuts. */
4542
4543 static bfd_boolean
4544 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4545 {
4546 struct ppc_link_hash_table *htab;
4547
4548 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4549 return FALSE;
4550
4551 htab = ppc_hash_table (info);
4552 if (htab == NULL)
4553 return FALSE;
4554
4555 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4556 if (!info->shared)
4557 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4558
4559 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4560 || (!info->shared && !htab->relbss))
4561 abort ();
4562
4563 return TRUE;
4564 }
4565
4566 /* Follow indirect and warning symbol links. */
4567
4568 static inline struct bfd_link_hash_entry *
4569 follow_link (struct bfd_link_hash_entry *h)
4570 {
4571 while (h->type == bfd_link_hash_indirect
4572 || h->type == bfd_link_hash_warning)
4573 h = h->u.i.link;
4574 return h;
4575 }
4576
4577 static inline struct elf_link_hash_entry *
4578 elf_follow_link (struct elf_link_hash_entry *h)
4579 {
4580 return (struct elf_link_hash_entry *) follow_link (&h->root);
4581 }
4582
4583 static inline struct ppc_link_hash_entry *
4584 ppc_follow_link (struct ppc_link_hash_entry *h)
4585 {
4586 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4587 }
4588
4589 /* Merge PLT info on FROM with that on TO. */
4590
4591 static void
4592 move_plt_plist (struct ppc_link_hash_entry *from,
4593 struct ppc_link_hash_entry *to)
4594 {
4595 if (from->elf.plt.plist != NULL)
4596 {
4597 if (to->elf.plt.plist != NULL)
4598 {
4599 struct plt_entry **entp;
4600 struct plt_entry *ent;
4601
4602 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4603 {
4604 struct plt_entry *dent;
4605
4606 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4607 if (dent->addend == ent->addend)
4608 {
4609 dent->plt.refcount += ent->plt.refcount;
4610 *entp = ent->next;
4611 break;
4612 }
4613 if (dent == NULL)
4614 entp = &ent->next;
4615 }
4616 *entp = to->elf.plt.plist;
4617 }
4618
4619 to->elf.plt.plist = from->elf.plt.plist;
4620 from->elf.plt.plist = NULL;
4621 }
4622 }
4623
4624 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4625
4626 static void
4627 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4628 struct elf_link_hash_entry *dir,
4629 struct elf_link_hash_entry *ind)
4630 {
4631 struct ppc_link_hash_entry *edir, *eind;
4632
4633 edir = (struct ppc_link_hash_entry *) dir;
4634 eind = (struct ppc_link_hash_entry *) ind;
4635
4636 edir->is_func |= eind->is_func;
4637 edir->is_func_descriptor |= eind->is_func_descriptor;
4638 edir->tls_mask |= eind->tls_mask;
4639 if (eind->oh != NULL)
4640 edir->oh = ppc_follow_link (eind->oh);
4641
4642 /* If called to transfer flags for a weakdef during processing
4643 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4644 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4645 if (!(ELIMINATE_COPY_RELOCS
4646 && eind->elf.root.type != bfd_link_hash_indirect
4647 && edir->elf.dynamic_adjusted))
4648 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4649
4650 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4651 edir->elf.ref_regular |= eind->elf.ref_regular;
4652 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4653 edir->elf.needs_plt |= eind->elf.needs_plt;
4654 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4655
4656 /* Copy over any dynamic relocs we may have on the indirect sym. */
4657 if (eind->dyn_relocs != NULL)
4658 {
4659 if (edir->dyn_relocs != NULL)
4660 {
4661 struct elf_dyn_relocs **pp;
4662 struct elf_dyn_relocs *p;
4663
4664 /* Add reloc counts against the indirect sym to the direct sym
4665 list. Merge any entries against the same section. */
4666 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4667 {
4668 struct elf_dyn_relocs *q;
4669
4670 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4671 if (q->sec == p->sec)
4672 {
4673 q->pc_count += p->pc_count;
4674 q->count += p->count;
4675 *pp = p->next;
4676 break;
4677 }
4678 if (q == NULL)
4679 pp = &p->next;
4680 }
4681 *pp = edir->dyn_relocs;
4682 }
4683
4684 edir->dyn_relocs = eind->dyn_relocs;
4685 eind->dyn_relocs = NULL;
4686 }
4687
4688 /* If we were called to copy over info for a weak sym, that's all.
4689 You might think dyn_relocs need not be copied over; After all,
4690 both syms will be dynamic or both non-dynamic so we're just
4691 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4692 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4693 dyn_relocs in read-only sections, and it does so on what is the
4694 DIR sym here. */
4695 if (eind->elf.root.type != bfd_link_hash_indirect)
4696 return;
4697
4698 /* Copy over got entries that we may have already seen to the
4699 symbol which just became indirect. */
4700 if (eind->elf.got.glist != NULL)
4701 {
4702 if (edir->elf.got.glist != NULL)
4703 {
4704 struct got_entry **entp;
4705 struct got_entry *ent;
4706
4707 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4708 {
4709 struct got_entry *dent;
4710
4711 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4712 if (dent->addend == ent->addend
4713 && dent->owner == ent->owner
4714 && dent->tls_type == ent->tls_type)
4715 {
4716 dent->got.refcount += ent->got.refcount;
4717 *entp = ent->next;
4718 break;
4719 }
4720 if (dent == NULL)
4721 entp = &ent->next;
4722 }
4723 *entp = edir->elf.got.glist;
4724 }
4725
4726 edir->elf.got.glist = eind->elf.got.glist;
4727 eind->elf.got.glist = NULL;
4728 }
4729
4730 /* And plt entries. */
4731 move_plt_plist (eind, edir);
4732
4733 if (eind->elf.dynindx != -1)
4734 {
4735 if (edir->elf.dynindx != -1)
4736 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4737 edir->elf.dynstr_index);
4738 edir->elf.dynindx = eind->elf.dynindx;
4739 edir->elf.dynstr_index = eind->elf.dynstr_index;
4740 eind->elf.dynindx = -1;
4741 eind->elf.dynstr_index = 0;
4742 }
4743 }
4744
4745 /* Find the function descriptor hash entry from the given function code
4746 hash entry FH. Link the entries via their OH fields. */
4747
4748 static struct ppc_link_hash_entry *
4749 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4750 {
4751 struct ppc_link_hash_entry *fdh = fh->oh;
4752
4753 if (fdh == NULL)
4754 {
4755 const char *fd_name = fh->elf.root.root.string + 1;
4756
4757 fdh = (struct ppc_link_hash_entry *)
4758 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4759 if (fdh == NULL)
4760 return fdh;
4761
4762 fdh->is_func_descriptor = 1;
4763 fdh->oh = fh;
4764 fh->is_func = 1;
4765 fh->oh = fdh;
4766 }
4767
4768 return ppc_follow_link (fdh);
4769 }
4770
4771 /* Make a fake function descriptor sym for the code sym FH. */
4772
4773 static struct ppc_link_hash_entry *
4774 make_fdh (struct bfd_link_info *info,
4775 struct ppc_link_hash_entry *fh)
4776 {
4777 bfd *abfd;
4778 asymbol *newsym;
4779 struct bfd_link_hash_entry *bh;
4780 struct ppc_link_hash_entry *fdh;
4781
4782 abfd = fh->elf.root.u.undef.abfd;
4783 newsym = bfd_make_empty_symbol (abfd);
4784 newsym->name = fh->elf.root.root.string + 1;
4785 newsym->section = bfd_und_section_ptr;
4786 newsym->value = 0;
4787 newsym->flags = BSF_WEAK;
4788
4789 bh = NULL;
4790 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4791 newsym->flags, newsym->section,
4792 newsym->value, NULL, FALSE, FALSE,
4793 &bh))
4794 return NULL;
4795
4796 fdh = (struct ppc_link_hash_entry *) bh;
4797 fdh->elf.non_elf = 0;
4798 fdh->fake = 1;
4799 fdh->is_func_descriptor = 1;
4800 fdh->oh = fh;
4801 fh->is_func = 1;
4802 fh->oh = fdh;
4803 return fdh;
4804 }
4805
4806 /* Fix function descriptor symbols defined in .opd sections to be
4807 function type. */
4808
4809 static bfd_boolean
4810 ppc64_elf_add_symbol_hook (bfd *ibfd,
4811 struct bfd_link_info *info,
4812 Elf_Internal_Sym *isym,
4813 const char **name,
4814 flagword *flags ATTRIBUTE_UNUSED,
4815 asection **sec,
4816 bfd_vma *value)
4817 {
4818 if ((ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4819 || ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4820 && (ibfd->flags & DYNAMIC) == 0
4821 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4822 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4823
4824 if (*sec != NULL
4825 && strcmp ((*sec)->name, ".opd") == 0)
4826 {
4827 asection *code_sec;
4828
4829 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4830 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4831 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4832
4833 /* If the symbol is a function defined in .opd, and the function
4834 code is in a discarded group, let it appear to be undefined. */
4835 if (!info->relocatable
4836 && (*sec)->reloc_count != 0
4837 && opd_entry_value (*sec, *value, &code_sec, NULL,
4838 FALSE) != (bfd_vma) -1
4839 && discarded_section (code_sec))
4840 {
4841 *sec = bfd_und_section_ptr;
4842 isym->st_shndx = SHN_UNDEF;
4843 }
4844 }
4845 else if (*sec != NULL
4846 && strcmp ((*sec)->name, ".toc") == 0
4847 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4848 {
4849 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4850 if (htab != NULL)
4851 htab->params->object_in_toc = 1;
4852 }
4853
4854 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4855 {
4856 if (abiversion (ibfd) == 0)
4857 set_abiversion (ibfd, 2);
4858 else if (abiversion (ibfd) == 1)
4859 {
4860 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4861 " for ABI version 1\n"), name);
4862 bfd_set_error (bfd_error_bad_value);
4863 return FALSE;
4864 }
4865 }
4866
4867 return TRUE;
4868 }
4869
4870 /* Merge non-visibility st_other attributes: local entry point. */
4871
4872 static void
4873 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4874 const Elf_Internal_Sym *isym,
4875 bfd_boolean definition,
4876 bfd_boolean dynamic)
4877 {
4878 if (definition && !dynamic)
4879 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4880 | ELF_ST_VISIBILITY (h->other));
4881 }
4882
4883 /* This function makes an old ABI object reference to ".bar" cause the
4884 inclusion of a new ABI object archive that defines "bar".
4885 NAME is a symbol defined in an archive. Return a symbol in the hash
4886 table that might be satisfied by the archive symbols. */
4887
4888 static struct elf_link_hash_entry *
4889 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4890 struct bfd_link_info *info,
4891 const char *name)
4892 {
4893 struct elf_link_hash_entry *h;
4894 char *dot_name;
4895 size_t len;
4896
4897 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4898 if (h != NULL
4899 /* Don't return this sym if it is a fake function descriptor
4900 created by add_symbol_adjust. */
4901 && !(h->root.type == bfd_link_hash_undefweak
4902 && ((struct ppc_link_hash_entry *) h)->fake))
4903 return h;
4904
4905 if (name[0] == '.')
4906 return h;
4907
4908 len = strlen (name);
4909 dot_name = bfd_alloc (abfd, len + 2);
4910 if (dot_name == NULL)
4911 return (struct elf_link_hash_entry *) 0 - 1;
4912 dot_name[0] = '.';
4913 memcpy (dot_name + 1, name, len + 1);
4914 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4915 bfd_release (abfd, dot_name);
4916 return h;
4917 }
4918
4919 /* This function satisfies all old ABI object references to ".bar" if a
4920 new ABI object defines "bar". Well, at least, undefined dot symbols
4921 are made weak. This stops later archive searches from including an
4922 object if we already have a function descriptor definition. It also
4923 prevents the linker complaining about undefined symbols.
4924 We also check and correct mismatched symbol visibility here. The
4925 most restrictive visibility of the function descriptor and the
4926 function entry symbol is used. */
4927
4928 static bfd_boolean
4929 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4930 {
4931 struct ppc_link_hash_table *htab;
4932 struct ppc_link_hash_entry *fdh;
4933
4934 if (eh->elf.root.type == bfd_link_hash_indirect)
4935 return TRUE;
4936
4937 if (eh->elf.root.type == bfd_link_hash_warning)
4938 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4939
4940 if (eh->elf.root.root.string[0] != '.')
4941 abort ();
4942
4943 htab = ppc_hash_table (info);
4944 if (htab == NULL)
4945 return FALSE;
4946
4947 fdh = lookup_fdh (eh, htab);
4948 if (fdh == NULL)
4949 {
4950 if (!info->relocatable
4951 && (eh->elf.root.type == bfd_link_hash_undefined
4952 || eh->elf.root.type == bfd_link_hash_undefweak)
4953 && eh->elf.ref_regular)
4954 {
4955 /* Make an undefweak function descriptor sym, which is enough to
4956 pull in an --as-needed shared lib, but won't cause link
4957 errors. Archives are handled elsewhere. */
4958 fdh = make_fdh (info, eh);
4959 if (fdh == NULL)
4960 return FALSE;
4961 fdh->elf.ref_regular = 1;
4962 }
4963 }
4964 else
4965 {
4966 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4967 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4968 if (entry_vis < descr_vis)
4969 fdh->elf.other += entry_vis - descr_vis;
4970 else if (entry_vis > descr_vis)
4971 eh->elf.other += descr_vis - entry_vis;
4972
4973 if ((fdh->elf.root.type == bfd_link_hash_defined
4974 || fdh->elf.root.type == bfd_link_hash_defweak)
4975 && eh->elf.root.type == bfd_link_hash_undefined)
4976 {
4977 eh->elf.root.type = bfd_link_hash_undefweak;
4978 eh->was_undefined = 1;
4979 htab->twiddled_syms = 1;
4980 }
4981 }
4982
4983 return TRUE;
4984 }
4985
4986 /* Set up opd section info and abiversion for IBFD, and process list
4987 of dot-symbols we made in link_hash_newfunc. */
4988
4989 static bfd_boolean
4990 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
4991 {
4992 struct ppc_link_hash_table *htab;
4993 struct ppc_link_hash_entry **p, *eh;
4994 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
4995
4996 if (opd != NULL && opd->size != 0)
4997 {
4998 if (abiversion (ibfd) == 0)
4999 set_abiversion (ibfd, 1);
5000 else if (abiversion (ibfd) == 2)
5001 {
5002 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5003 " version %d\n"),
5004 ibfd, abiversion (ibfd));
5005 bfd_set_error (bfd_error_bad_value);
5006 return FALSE;
5007 }
5008
5009 if ((ibfd->flags & DYNAMIC) == 0
5010 && (opd->flags & SEC_RELOC) != 0
5011 && opd->reloc_count != 0
5012 && !bfd_is_abs_section (opd->output_section))
5013 {
5014 /* Garbage collection needs some extra help with .opd sections.
5015 We don't want to necessarily keep everything referenced by
5016 relocs in .opd, as that would keep all functions. Instead,
5017 if we reference an .opd symbol (a function descriptor), we
5018 want to keep the function code symbol's section. This is
5019 easy for global symbols, but for local syms we need to keep
5020 information about the associated function section. */
5021 bfd_size_type amt;
5022 asection **opd_sym_map;
5023
5024 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5025 opd_sym_map = bfd_zalloc (ibfd, amt);
5026 if (opd_sym_map == NULL)
5027 return FALSE;
5028 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5029 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5030 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5031 }
5032 }
5033
5034 if (!is_ppc64_elf (info->output_bfd))
5035 return TRUE;
5036 htab = ppc_hash_table (info);
5037 if (htab == NULL)
5038 return FALSE;
5039
5040 /* For input files without an explicit abiversion in e_flags
5041 we should have flagged any with symbol st_other bits set
5042 as ELFv1 and above flagged those with .opd as ELFv2.
5043 Set the output abiversion if not yet set, and for any input
5044 still ambiguous, take its abiversion from the output.
5045 Differences in ABI are reported later. */
5046 if (abiversion (info->output_bfd) == 0)
5047 set_abiversion (info->output_bfd, abiversion (ibfd));
5048 else if (abiversion (ibfd) == 0)
5049 set_abiversion (ibfd, abiversion (info->output_bfd));
5050
5051 p = &htab->dot_syms;
5052 while ((eh = *p) != NULL)
5053 {
5054 *p = NULL;
5055 if (&eh->elf == htab->elf.hgot)
5056 ;
5057 else if (htab->elf.hgot == NULL
5058 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5059 htab->elf.hgot = &eh->elf;
5060 else if (!add_symbol_adjust (eh, info))
5061 return FALSE;
5062 p = &eh->u.next_dot_sym;
5063 }
5064
5065 /* Clear the list for non-ppc64 input files. */
5066 p = &htab->dot_syms;
5067 while ((eh = *p) != NULL)
5068 {
5069 *p = NULL;
5070 p = &eh->u.next_dot_sym;
5071 }
5072
5073 /* We need to fix the undefs list for any syms we have twiddled to
5074 undef_weak. */
5075 if (htab->twiddled_syms)
5076 {
5077 bfd_link_repair_undef_list (&htab->elf.root);
5078 htab->twiddled_syms = 0;
5079 }
5080 return TRUE;
5081 }
5082
5083 /* Undo hash table changes when an --as-needed input file is determined
5084 not to be needed. */
5085
5086 static bfd_boolean
5087 ppc64_elf_notice_as_needed (bfd *ibfd,
5088 struct bfd_link_info *info,
5089 enum notice_asneeded_action act)
5090 {
5091 if (act == notice_not_needed)
5092 {
5093 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5094
5095 if (htab == NULL)
5096 return FALSE;
5097
5098 htab->dot_syms = NULL;
5099 }
5100 return _bfd_elf_notice_as_needed (ibfd, info, act);
5101 }
5102
5103 /* If --just-symbols against a final linked binary, then assume we need
5104 toc adjusting stubs when calling functions defined there. */
5105
5106 static void
5107 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5108 {
5109 if ((sec->flags & SEC_CODE) != 0
5110 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5111 && is_ppc64_elf (sec->owner))
5112 {
5113 if (abiversion (sec->owner) >= 2
5114 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5115 sec->has_toc_reloc = 1;
5116 }
5117 _bfd_elf_link_just_syms (sec, info);
5118 }
5119
5120 static struct plt_entry **
5121 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5122 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5123 {
5124 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5125 struct plt_entry **local_plt;
5126 unsigned char *local_got_tls_masks;
5127
5128 if (local_got_ents == NULL)
5129 {
5130 bfd_size_type size = symtab_hdr->sh_info;
5131
5132 size *= (sizeof (*local_got_ents)
5133 + sizeof (*local_plt)
5134 + sizeof (*local_got_tls_masks));
5135 local_got_ents = bfd_zalloc (abfd, size);
5136 if (local_got_ents == NULL)
5137 return NULL;
5138 elf_local_got_ents (abfd) = local_got_ents;
5139 }
5140
5141 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5142 {
5143 struct got_entry *ent;
5144
5145 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5146 if (ent->addend == r_addend
5147 && ent->owner == abfd
5148 && ent->tls_type == tls_type)
5149 break;
5150 if (ent == NULL)
5151 {
5152 bfd_size_type amt = sizeof (*ent);
5153 ent = bfd_alloc (abfd, amt);
5154 if (ent == NULL)
5155 return FALSE;
5156 ent->next = local_got_ents[r_symndx];
5157 ent->addend = r_addend;
5158 ent->owner = abfd;
5159 ent->tls_type = tls_type;
5160 ent->is_indirect = FALSE;
5161 ent->got.refcount = 0;
5162 local_got_ents[r_symndx] = ent;
5163 }
5164 ent->got.refcount += 1;
5165 }
5166
5167 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5168 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5169 local_got_tls_masks[r_symndx] |= tls_type;
5170
5171 return local_plt + r_symndx;
5172 }
5173
5174 static bfd_boolean
5175 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5176 {
5177 struct plt_entry *ent;
5178
5179 for (ent = *plist; ent != NULL; ent = ent->next)
5180 if (ent->addend == addend)
5181 break;
5182 if (ent == NULL)
5183 {
5184 bfd_size_type amt = sizeof (*ent);
5185 ent = bfd_alloc (abfd, amt);
5186 if (ent == NULL)
5187 return FALSE;
5188 ent->next = *plist;
5189 ent->addend = addend;
5190 ent->plt.refcount = 0;
5191 *plist = ent;
5192 }
5193 ent->plt.refcount += 1;
5194 return TRUE;
5195 }
5196
5197 static bfd_boolean
5198 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5199 {
5200 return (r_type == R_PPC64_REL24
5201 || r_type == R_PPC64_REL14
5202 || r_type == R_PPC64_REL14_BRTAKEN
5203 || r_type == R_PPC64_REL14_BRNTAKEN
5204 || r_type == R_PPC64_ADDR24
5205 || r_type == R_PPC64_ADDR14
5206 || r_type == R_PPC64_ADDR14_BRTAKEN
5207 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5208 }
5209
5210 /* Look through the relocs for a section during the first phase, and
5211 calculate needed space in the global offset table, procedure
5212 linkage table, and dynamic reloc sections. */
5213
5214 static bfd_boolean
5215 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5216 asection *sec, const Elf_Internal_Rela *relocs)
5217 {
5218 struct ppc_link_hash_table *htab;
5219 Elf_Internal_Shdr *symtab_hdr;
5220 struct elf_link_hash_entry **sym_hashes;
5221 const Elf_Internal_Rela *rel;
5222 const Elf_Internal_Rela *rel_end;
5223 asection *sreloc;
5224 asection **opd_sym_map;
5225 struct elf_link_hash_entry *tga, *dottga;
5226
5227 if (info->relocatable)
5228 return TRUE;
5229
5230 /* Don't do anything special with non-loaded, non-alloced sections.
5231 In particular, any relocs in such sections should not affect GOT
5232 and PLT reference counting (ie. we don't allow them to create GOT
5233 or PLT entries), there's no possibility or desire to optimize TLS
5234 relocs, and there's not much point in propagating relocs to shared
5235 libs that the dynamic linker won't relocate. */
5236 if ((sec->flags & SEC_ALLOC) == 0)
5237 return TRUE;
5238
5239 BFD_ASSERT (is_ppc64_elf (abfd));
5240
5241 htab = ppc_hash_table (info);
5242 if (htab == NULL)
5243 return FALSE;
5244
5245 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5246 FALSE, FALSE, TRUE);
5247 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5248 FALSE, FALSE, TRUE);
5249 symtab_hdr = &elf_symtab_hdr (abfd);
5250 sym_hashes = elf_sym_hashes (abfd);
5251 sreloc = NULL;
5252 opd_sym_map = NULL;
5253 if (ppc64_elf_section_data (sec) != NULL
5254 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5255 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5256
5257 rel_end = relocs + sec->reloc_count;
5258 for (rel = relocs; rel < rel_end; rel++)
5259 {
5260 unsigned long r_symndx;
5261 struct elf_link_hash_entry *h;
5262 enum elf_ppc64_reloc_type r_type;
5263 int tls_type;
5264 struct _ppc64_elf_section_data *ppc64_sec;
5265 struct plt_entry **ifunc;
5266
5267 r_symndx = ELF64_R_SYM (rel->r_info);
5268 if (r_symndx < symtab_hdr->sh_info)
5269 h = NULL;
5270 else
5271 {
5272 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5273 h = elf_follow_link (h);
5274
5275 /* PR15323, ref flags aren't set for references in the same
5276 object. */
5277 h->root.non_ir_ref = 1;
5278
5279 if (h == htab->elf.hgot)
5280 sec->has_toc_reloc = 1;
5281 }
5282
5283 tls_type = 0;
5284 ifunc = NULL;
5285 if (h != NULL)
5286 {
5287 if (h->type == STT_GNU_IFUNC)
5288 {
5289 h->needs_plt = 1;
5290 ifunc = &h->plt.plist;
5291 }
5292 }
5293 else
5294 {
5295 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5296 abfd, r_symndx);
5297 if (isym == NULL)
5298 return FALSE;
5299
5300 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5301 {
5302 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5303 rel->r_addend, PLT_IFUNC);
5304 if (ifunc == NULL)
5305 return FALSE;
5306 }
5307 }
5308 r_type = ELF64_R_TYPE (rel->r_info);
5309 if (is_branch_reloc (r_type))
5310 {
5311 if (h != NULL && (h == tga || h == dottga))
5312 {
5313 if (rel != relocs
5314 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5315 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5316 /* We have a new-style __tls_get_addr call with a marker
5317 reloc. */
5318 ;
5319 else
5320 /* Mark this section as having an old-style call. */
5321 sec->has_tls_get_addr_call = 1;
5322 }
5323
5324 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5325 if (ifunc != NULL
5326 && !update_plt_info (abfd, ifunc, rel->r_addend))
5327 return FALSE;
5328 }
5329
5330 switch (r_type)
5331 {
5332 case R_PPC64_TLSGD:
5333 case R_PPC64_TLSLD:
5334 /* These special tls relocs tie a call to __tls_get_addr with
5335 its parameter symbol. */
5336 break;
5337
5338 case R_PPC64_GOT_TLSLD16:
5339 case R_PPC64_GOT_TLSLD16_LO:
5340 case R_PPC64_GOT_TLSLD16_HI:
5341 case R_PPC64_GOT_TLSLD16_HA:
5342 tls_type = TLS_TLS | TLS_LD;
5343 goto dogottls;
5344
5345 case R_PPC64_GOT_TLSGD16:
5346 case R_PPC64_GOT_TLSGD16_LO:
5347 case R_PPC64_GOT_TLSGD16_HI:
5348 case R_PPC64_GOT_TLSGD16_HA:
5349 tls_type = TLS_TLS | TLS_GD;
5350 goto dogottls;
5351
5352 case R_PPC64_GOT_TPREL16_DS:
5353 case R_PPC64_GOT_TPREL16_LO_DS:
5354 case R_PPC64_GOT_TPREL16_HI:
5355 case R_PPC64_GOT_TPREL16_HA:
5356 if (info->shared)
5357 info->flags |= DF_STATIC_TLS;
5358 tls_type = TLS_TLS | TLS_TPREL;
5359 goto dogottls;
5360
5361 case R_PPC64_GOT_DTPREL16_DS:
5362 case R_PPC64_GOT_DTPREL16_LO_DS:
5363 case R_PPC64_GOT_DTPREL16_HI:
5364 case R_PPC64_GOT_DTPREL16_HA:
5365 tls_type = TLS_TLS | TLS_DTPREL;
5366 dogottls:
5367 sec->has_tls_reloc = 1;
5368 /* Fall thru */
5369
5370 case R_PPC64_GOT16:
5371 case R_PPC64_GOT16_DS:
5372 case R_PPC64_GOT16_HA:
5373 case R_PPC64_GOT16_HI:
5374 case R_PPC64_GOT16_LO:
5375 case R_PPC64_GOT16_LO_DS:
5376 /* This symbol requires a global offset table entry. */
5377 sec->has_toc_reloc = 1;
5378 if (r_type == R_PPC64_GOT_TLSLD16
5379 || r_type == R_PPC64_GOT_TLSGD16
5380 || r_type == R_PPC64_GOT_TPREL16_DS
5381 || r_type == R_PPC64_GOT_DTPREL16_DS
5382 || r_type == R_PPC64_GOT16
5383 || r_type == R_PPC64_GOT16_DS)
5384 {
5385 htab->do_multi_toc = 1;
5386 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5387 }
5388
5389 if (ppc64_elf_tdata (abfd)->got == NULL
5390 && !create_got_section (abfd, info))
5391 return FALSE;
5392
5393 if (h != NULL)
5394 {
5395 struct ppc_link_hash_entry *eh;
5396 struct got_entry *ent;
5397
5398 eh = (struct ppc_link_hash_entry *) h;
5399 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5400 if (ent->addend == rel->r_addend
5401 && ent->owner == abfd
5402 && ent->tls_type == tls_type)
5403 break;
5404 if (ent == NULL)
5405 {
5406 bfd_size_type amt = sizeof (*ent);
5407 ent = bfd_alloc (abfd, amt);
5408 if (ent == NULL)
5409 return FALSE;
5410 ent->next = eh->elf.got.glist;
5411 ent->addend = rel->r_addend;
5412 ent->owner = abfd;
5413 ent->tls_type = tls_type;
5414 ent->is_indirect = FALSE;
5415 ent->got.refcount = 0;
5416 eh->elf.got.glist = ent;
5417 }
5418 ent->got.refcount += 1;
5419 eh->tls_mask |= tls_type;
5420 }
5421 else
5422 /* This is a global offset table entry for a local symbol. */
5423 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5424 rel->r_addend, tls_type))
5425 return FALSE;
5426
5427 /* We may also need a plt entry if the symbol turns out to be
5428 an ifunc. */
5429 if (h != NULL && !info->shared && abiversion (abfd) != 1)
5430 {
5431 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5432 return FALSE;
5433 }
5434 break;
5435
5436 case R_PPC64_PLT16_HA:
5437 case R_PPC64_PLT16_HI:
5438 case R_PPC64_PLT16_LO:
5439 case R_PPC64_PLT32:
5440 case R_PPC64_PLT64:
5441 /* This symbol requires a procedure linkage table entry. We
5442 actually build the entry in adjust_dynamic_symbol,
5443 because this might be a case of linking PIC code without
5444 linking in any dynamic objects, in which case we don't
5445 need to generate a procedure linkage table after all. */
5446 if (h == NULL)
5447 {
5448 /* It does not make sense to have a procedure linkage
5449 table entry for a local symbol. */
5450 bfd_set_error (bfd_error_bad_value);
5451 return FALSE;
5452 }
5453 else
5454 {
5455 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5456 return FALSE;
5457 h->needs_plt = 1;
5458 if (h->root.root.string[0] == '.'
5459 && h->root.root.string[1] != '\0')
5460 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5461 }
5462 break;
5463
5464 /* The following relocations don't need to propagate the
5465 relocation if linking a shared object since they are
5466 section relative. */
5467 case R_PPC64_SECTOFF:
5468 case R_PPC64_SECTOFF_LO:
5469 case R_PPC64_SECTOFF_HI:
5470 case R_PPC64_SECTOFF_HA:
5471 case R_PPC64_SECTOFF_DS:
5472 case R_PPC64_SECTOFF_LO_DS:
5473 case R_PPC64_DTPREL16:
5474 case R_PPC64_DTPREL16_LO:
5475 case R_PPC64_DTPREL16_HI:
5476 case R_PPC64_DTPREL16_HA:
5477 case R_PPC64_DTPREL16_DS:
5478 case R_PPC64_DTPREL16_LO_DS:
5479 case R_PPC64_DTPREL16_HIGH:
5480 case R_PPC64_DTPREL16_HIGHA:
5481 case R_PPC64_DTPREL16_HIGHER:
5482 case R_PPC64_DTPREL16_HIGHERA:
5483 case R_PPC64_DTPREL16_HIGHEST:
5484 case R_PPC64_DTPREL16_HIGHESTA:
5485 break;
5486
5487 /* Nor do these. */
5488 case R_PPC64_REL16:
5489 case R_PPC64_REL16_LO:
5490 case R_PPC64_REL16_HI:
5491 case R_PPC64_REL16_HA:
5492 break;
5493
5494 /* Not supported as a dynamic relocation. */
5495 case R_PPC64_ADDR64_LOCAL:
5496 if (info->shared)
5497 {
5498 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5499 ppc_howto_init ();
5500 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5501 "in shared libraries and PIEs.\n"),
5502 abfd, sec, rel->r_offset,
5503 ppc64_elf_howto_table[r_type]->name);
5504 bfd_set_error (bfd_error_bad_value);
5505 return FALSE;
5506 }
5507 break;
5508
5509 case R_PPC64_TOC16:
5510 case R_PPC64_TOC16_DS:
5511 htab->do_multi_toc = 1;
5512 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5513 case R_PPC64_TOC16_LO:
5514 case R_PPC64_TOC16_HI:
5515 case R_PPC64_TOC16_HA:
5516 case R_PPC64_TOC16_LO_DS:
5517 sec->has_toc_reloc = 1;
5518 break;
5519
5520 /* This relocation describes the C++ object vtable hierarchy.
5521 Reconstruct it for later use during GC. */
5522 case R_PPC64_GNU_VTINHERIT:
5523 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5524 return FALSE;
5525 break;
5526
5527 /* This relocation describes which C++ vtable entries are actually
5528 used. Record for later use during GC. */
5529 case R_PPC64_GNU_VTENTRY:
5530 BFD_ASSERT (h != NULL);
5531 if (h != NULL
5532 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5533 return FALSE;
5534 break;
5535
5536 case R_PPC64_REL14:
5537 case R_PPC64_REL14_BRTAKEN:
5538 case R_PPC64_REL14_BRNTAKEN:
5539 {
5540 asection *dest = NULL;
5541
5542 /* Heuristic: If jumping outside our section, chances are
5543 we are going to need a stub. */
5544 if (h != NULL)
5545 {
5546 /* If the sym is weak it may be overridden later, so
5547 don't assume we know where a weak sym lives. */
5548 if (h->root.type == bfd_link_hash_defined)
5549 dest = h->root.u.def.section;
5550 }
5551 else
5552 {
5553 Elf_Internal_Sym *isym;
5554
5555 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5556 abfd, r_symndx);
5557 if (isym == NULL)
5558 return FALSE;
5559
5560 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5561 }
5562
5563 if (dest != sec)
5564 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5565 }
5566 /* Fall through. */
5567
5568 case R_PPC64_REL24:
5569 if (h != NULL && ifunc == NULL)
5570 {
5571 /* We may need a .plt entry if the function this reloc
5572 refers to is in a shared lib. */
5573 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5574 return FALSE;
5575 h->needs_plt = 1;
5576 if (h->root.root.string[0] == '.'
5577 && h->root.root.string[1] != '\0')
5578 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5579 if (h == tga || h == dottga)
5580 sec->has_tls_reloc = 1;
5581 }
5582 break;
5583
5584 case R_PPC64_TPREL64:
5585 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5586 if (info->shared)
5587 info->flags |= DF_STATIC_TLS;
5588 goto dotlstoc;
5589
5590 case R_PPC64_DTPMOD64:
5591 if (rel + 1 < rel_end
5592 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5593 && rel[1].r_offset == rel->r_offset + 8)
5594 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5595 else
5596 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5597 goto dotlstoc;
5598
5599 case R_PPC64_DTPREL64:
5600 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5601 if (rel != relocs
5602 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5603 && rel[-1].r_offset == rel->r_offset - 8)
5604 /* This is the second reloc of a dtpmod, dtprel pair.
5605 Don't mark with TLS_DTPREL. */
5606 goto dodyn;
5607
5608 dotlstoc:
5609 sec->has_tls_reloc = 1;
5610 if (h != NULL)
5611 {
5612 struct ppc_link_hash_entry *eh;
5613 eh = (struct ppc_link_hash_entry *) h;
5614 eh->tls_mask |= tls_type;
5615 }
5616 else
5617 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5618 rel->r_addend, tls_type))
5619 return FALSE;
5620
5621 ppc64_sec = ppc64_elf_section_data (sec);
5622 if (ppc64_sec->sec_type != sec_toc)
5623 {
5624 bfd_size_type amt;
5625
5626 /* One extra to simplify get_tls_mask. */
5627 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5628 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5629 if (ppc64_sec->u.toc.symndx == NULL)
5630 return FALSE;
5631 amt = sec->size * sizeof (bfd_vma) / 8;
5632 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5633 if (ppc64_sec->u.toc.add == NULL)
5634 return FALSE;
5635 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5636 ppc64_sec->sec_type = sec_toc;
5637 }
5638 BFD_ASSERT (rel->r_offset % 8 == 0);
5639 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5640 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5641
5642 /* Mark the second slot of a GD or LD entry.
5643 -1 to indicate GD and -2 to indicate LD. */
5644 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5645 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5646 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5647 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5648 goto dodyn;
5649
5650 case R_PPC64_TPREL16:
5651 case R_PPC64_TPREL16_LO:
5652 case R_PPC64_TPREL16_HI:
5653 case R_PPC64_TPREL16_HA:
5654 case R_PPC64_TPREL16_DS:
5655 case R_PPC64_TPREL16_LO_DS:
5656 case R_PPC64_TPREL16_HIGH:
5657 case R_PPC64_TPREL16_HIGHA:
5658 case R_PPC64_TPREL16_HIGHER:
5659 case R_PPC64_TPREL16_HIGHERA:
5660 case R_PPC64_TPREL16_HIGHEST:
5661 case R_PPC64_TPREL16_HIGHESTA:
5662 if (info->shared)
5663 {
5664 info->flags |= DF_STATIC_TLS;
5665 goto dodyn;
5666 }
5667 break;
5668
5669 case R_PPC64_ADDR64:
5670 if (opd_sym_map != NULL
5671 && rel + 1 < rel_end
5672 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5673 {
5674 if (h != NULL)
5675 {
5676 if (h->root.root.string[0] == '.'
5677 && h->root.root.string[1] != 0
5678 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5679 ;
5680 else
5681 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5682 }
5683 else
5684 {
5685 asection *s;
5686 Elf_Internal_Sym *isym;
5687
5688 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5689 abfd, r_symndx);
5690 if (isym == NULL)
5691 return FALSE;
5692
5693 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5694 if (s != NULL && s != sec)
5695 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5696 }
5697 }
5698 /* Fall through. */
5699
5700 case R_PPC64_ADDR16:
5701 case R_PPC64_ADDR16_DS:
5702 case R_PPC64_ADDR16_HA:
5703 case R_PPC64_ADDR16_HI:
5704 case R_PPC64_ADDR16_HIGH:
5705 case R_PPC64_ADDR16_HIGHA:
5706 case R_PPC64_ADDR16_HIGHER:
5707 case R_PPC64_ADDR16_HIGHERA:
5708 case R_PPC64_ADDR16_HIGHEST:
5709 case R_PPC64_ADDR16_HIGHESTA:
5710 case R_PPC64_ADDR16_LO:
5711 case R_PPC64_ADDR16_LO_DS:
5712 if (h != NULL && !info->shared && abiversion (abfd) != 1
5713 && rel->r_addend == 0)
5714 {
5715 /* We may need a .plt entry if this reloc refers to a
5716 function in a shared lib. */
5717 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5718 return FALSE;
5719 h->pointer_equality_needed = 1;
5720 }
5721 /* Fall through. */
5722
5723 case R_PPC64_REL30:
5724 case R_PPC64_REL32:
5725 case R_PPC64_REL64:
5726 case R_PPC64_ADDR14:
5727 case R_PPC64_ADDR14_BRNTAKEN:
5728 case R_PPC64_ADDR14_BRTAKEN:
5729 case R_PPC64_ADDR24:
5730 case R_PPC64_ADDR32:
5731 case R_PPC64_UADDR16:
5732 case R_PPC64_UADDR32:
5733 case R_PPC64_UADDR64:
5734 case R_PPC64_TOC:
5735 if (h != NULL && !info->shared)
5736 /* We may need a copy reloc. */
5737 h->non_got_ref = 1;
5738
5739 /* Don't propagate .opd relocs. */
5740 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5741 break;
5742
5743 /* If we are creating a shared library, and this is a reloc
5744 against a global symbol, or a non PC relative reloc
5745 against a local symbol, then we need to copy the reloc
5746 into the shared library. However, if we are linking with
5747 -Bsymbolic, we do not need to copy a reloc against a
5748 global symbol which is defined in an object we are
5749 including in the link (i.e., DEF_REGULAR is set). At
5750 this point we have not seen all the input files, so it is
5751 possible that DEF_REGULAR is not set now but will be set
5752 later (it is never cleared). In case of a weak definition,
5753 DEF_REGULAR may be cleared later by a strong definition in
5754 a shared library. We account for that possibility below by
5755 storing information in the dyn_relocs field of the hash
5756 table entry. A similar situation occurs when creating
5757 shared libraries and symbol visibility changes render the
5758 symbol local.
5759
5760 If on the other hand, we are creating an executable, we
5761 may need to keep relocations for symbols satisfied by a
5762 dynamic library if we manage to avoid copy relocs for the
5763 symbol. */
5764 dodyn:
5765 if ((info->shared
5766 && (must_be_dyn_reloc (info, r_type)
5767 || (h != NULL
5768 && (!SYMBOLIC_BIND (info, h)
5769 || h->root.type == bfd_link_hash_defweak
5770 || !h->def_regular))))
5771 || (ELIMINATE_COPY_RELOCS
5772 && !info->shared
5773 && h != NULL
5774 && (h->root.type == bfd_link_hash_defweak
5775 || !h->def_regular))
5776 || (!info->shared
5777 && ifunc != NULL))
5778 {
5779 /* We must copy these reloc types into the output file.
5780 Create a reloc section in dynobj and make room for
5781 this reloc. */
5782 if (sreloc == NULL)
5783 {
5784 sreloc = _bfd_elf_make_dynamic_reloc_section
5785 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5786
5787 if (sreloc == NULL)
5788 return FALSE;
5789 }
5790
5791 /* If this is a global symbol, we count the number of
5792 relocations we need for this symbol. */
5793 if (h != NULL)
5794 {
5795 struct elf_dyn_relocs *p;
5796 struct elf_dyn_relocs **head;
5797
5798 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5799 p = *head;
5800 if (p == NULL || p->sec != sec)
5801 {
5802 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5803 if (p == NULL)
5804 return FALSE;
5805 p->next = *head;
5806 *head = p;
5807 p->sec = sec;
5808 p->count = 0;
5809 p->pc_count = 0;
5810 }
5811 p->count += 1;
5812 if (!must_be_dyn_reloc (info, r_type))
5813 p->pc_count += 1;
5814 }
5815 else
5816 {
5817 /* Track dynamic relocs needed for local syms too.
5818 We really need local syms available to do this
5819 easily. Oh well. */
5820 struct ppc_dyn_relocs *p;
5821 struct ppc_dyn_relocs **head;
5822 bfd_boolean is_ifunc;
5823 asection *s;
5824 void *vpp;
5825 Elf_Internal_Sym *isym;
5826
5827 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5828 abfd, r_symndx);
5829 if (isym == NULL)
5830 return FALSE;
5831
5832 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5833 if (s == NULL)
5834 s = sec;
5835
5836 vpp = &elf_section_data (s)->local_dynrel;
5837 head = (struct ppc_dyn_relocs **) vpp;
5838 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5839 p = *head;
5840 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5841 p = p->next;
5842 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5843 {
5844 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5845 if (p == NULL)
5846 return FALSE;
5847 p->next = *head;
5848 *head = p;
5849 p->sec = sec;
5850 p->ifunc = is_ifunc;
5851 p->count = 0;
5852 }
5853 p->count += 1;
5854 }
5855 }
5856 break;
5857
5858 default:
5859 break;
5860 }
5861 }
5862
5863 return TRUE;
5864 }
5865
5866 /* Merge backend specific data from an object file to the output
5867 object file when linking. */
5868
5869 static bfd_boolean
5870 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5871 {
5872 unsigned long iflags, oflags;
5873
5874 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5875 return TRUE;
5876
5877 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5878 return TRUE;
5879
5880 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5881 return FALSE;
5882
5883 iflags = elf_elfheader (ibfd)->e_flags;
5884 oflags = elf_elfheader (obfd)->e_flags;
5885
5886 if (iflags & ~EF_PPC64_ABI)
5887 {
5888 (*_bfd_error_handler)
5889 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5890 bfd_set_error (bfd_error_bad_value);
5891 return FALSE;
5892 }
5893 else if (iflags != oflags && iflags != 0)
5894 {
5895 (*_bfd_error_handler)
5896 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5897 ibfd, iflags, oflags);
5898 bfd_set_error (bfd_error_bad_value);
5899 return FALSE;
5900 }
5901
5902 /* Merge Tag_compatibility attributes and any common GNU ones. */
5903 _bfd_elf_merge_object_attributes (ibfd, obfd);
5904
5905 return TRUE;
5906 }
5907
5908 static bfd_boolean
5909 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5910 {
5911 /* Print normal ELF private data. */
5912 _bfd_elf_print_private_bfd_data (abfd, ptr);
5913
5914 if (elf_elfheader (abfd)->e_flags != 0)
5915 {
5916 FILE *file = ptr;
5917
5918 /* xgettext:c-format */
5919 fprintf (file, _("private flags = 0x%lx:"),
5920 elf_elfheader (abfd)->e_flags);
5921
5922 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5923 fprintf (file, _(" [abiv%ld]"),
5924 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5925 fputc ('\n', file);
5926 }
5927
5928 return TRUE;
5929 }
5930
5931 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5932 of the code entry point, and its section, which must be in the same
5933 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
5934
5935 static bfd_vma
5936 opd_entry_value (asection *opd_sec,
5937 bfd_vma offset,
5938 asection **code_sec,
5939 bfd_vma *code_off,
5940 bfd_boolean in_code_sec)
5941 {
5942 bfd *opd_bfd = opd_sec->owner;
5943 Elf_Internal_Rela *relocs;
5944 Elf_Internal_Rela *lo, *hi, *look;
5945 bfd_vma val;
5946
5947 /* No relocs implies we are linking a --just-symbols object, or looking
5948 at a final linked executable with addr2line or somesuch. */
5949 if (opd_sec->reloc_count == 0)
5950 {
5951 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5952
5953 if (contents == NULL)
5954 {
5955 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5956 return (bfd_vma) -1;
5957 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5958 }
5959
5960 /* PR 17512: file: 64b9dfbb. */
5961 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
5962 return (bfd_vma) -1;
5963
5964 val = bfd_get_64 (opd_bfd, contents + offset);
5965 if (code_sec != NULL)
5966 {
5967 asection *sec, *likely = NULL;
5968
5969 if (in_code_sec)
5970 {
5971 sec = *code_sec;
5972 if (sec->vma <= val
5973 && val < sec->vma + sec->size)
5974 likely = sec;
5975 else
5976 val = -1;
5977 }
5978 else
5979 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5980 if (sec->vma <= val
5981 && (sec->flags & SEC_LOAD) != 0
5982 && (sec->flags & SEC_ALLOC) != 0)
5983 likely = sec;
5984 if (likely != NULL)
5985 {
5986 *code_sec = likely;
5987 if (code_off != NULL)
5988 *code_off = val - likely->vma;
5989 }
5990 }
5991 return val;
5992 }
5993
5994 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5995
5996 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5997 if (relocs == NULL)
5998 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5999 /* PR 17512: file: df8e1fd6. */
6000 if (relocs == NULL)
6001 return (bfd_vma) -1;
6002
6003 /* Go find the opd reloc at the sym address. */
6004 lo = relocs;
6005 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6006 val = (bfd_vma) -1;
6007 while (lo < hi)
6008 {
6009 look = lo + (hi - lo) / 2;
6010 if (look->r_offset < offset)
6011 lo = look + 1;
6012 else if (look->r_offset > offset)
6013 hi = look;
6014 else
6015 {
6016 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6017
6018 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6019 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6020 {
6021 unsigned long symndx = ELF64_R_SYM (look->r_info);
6022 asection *sec = NULL;
6023
6024 if (symndx >= symtab_hdr->sh_info
6025 && elf_sym_hashes (opd_bfd) != NULL)
6026 {
6027 struct elf_link_hash_entry **sym_hashes;
6028 struct elf_link_hash_entry *rh;
6029
6030 sym_hashes = elf_sym_hashes (opd_bfd);
6031 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6032 if (rh != NULL)
6033 {
6034 rh = elf_follow_link (rh);
6035 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
6036 || rh->root.type == bfd_link_hash_defweak);
6037 val = rh->root.u.def.value;
6038 sec = rh->root.u.def.section;
6039 if (sec->owner != opd_bfd)
6040 {
6041 sec = NULL;
6042 val = (bfd_vma) -1;
6043 }
6044 }
6045 }
6046
6047 if (sec == NULL)
6048 {
6049 Elf_Internal_Sym *sym;
6050
6051 if (symndx < symtab_hdr->sh_info)
6052 {
6053 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6054 if (sym == NULL)
6055 {
6056 size_t symcnt = symtab_hdr->sh_info;
6057 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6058 symcnt, 0,
6059 NULL, NULL, NULL);
6060 if (sym == NULL)
6061 break;
6062 symtab_hdr->contents = (bfd_byte *) sym;
6063 }
6064 sym += symndx;
6065 }
6066 else
6067 {
6068 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6069 1, symndx,
6070 NULL, NULL, NULL);
6071 if (sym == NULL)
6072 break;
6073 }
6074 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6075 if (sec == NULL)
6076 break;
6077 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6078 val = sym->st_value;
6079 }
6080
6081 val += look->r_addend;
6082 if (code_off != NULL)
6083 *code_off = val;
6084 if (code_sec != NULL)
6085 {
6086 if (in_code_sec && *code_sec != sec)
6087 return -1;
6088 else
6089 *code_sec = sec;
6090 }
6091 if (sec->output_section != NULL)
6092 val += sec->output_section->vma + sec->output_offset;
6093 }
6094 break;
6095 }
6096 }
6097
6098 return val;
6099 }
6100
6101 /* If the ELF symbol SYM might be a function in SEC, return the
6102 function size and set *CODE_OFF to the function's entry point,
6103 otherwise return zero. */
6104
6105 static bfd_size_type
6106 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6107 bfd_vma *code_off)
6108 {
6109 bfd_size_type size;
6110
6111 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6112 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6113 return 0;
6114
6115 size = 0;
6116 if (!(sym->flags & BSF_SYNTHETIC))
6117 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6118
6119 if (strcmp (sym->section->name, ".opd") == 0)
6120 {
6121 if (opd_entry_value (sym->section, sym->value,
6122 &sec, code_off, TRUE) == (bfd_vma) -1)
6123 return 0;
6124 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6125 symbol. This size has nothing to do with the code size of the
6126 function, which is what we're supposed to return, but the
6127 code size isn't available without looking up the dot-sym.
6128 However, doing that would be a waste of time particularly
6129 since elf_find_function will look at the dot-sym anyway.
6130 Now, elf_find_function will keep the largest size of any
6131 function sym found at the code address of interest, so return
6132 1 here to avoid it incorrectly caching a larger function size
6133 for a small function. This does mean we return the wrong
6134 size for a new-ABI function of size 24, but all that does is
6135 disable caching for such functions. */
6136 if (size == 24)
6137 size = 1;
6138 }
6139 else
6140 {
6141 if (sym->section != sec)
6142 return 0;
6143 *code_off = sym->value;
6144 }
6145 if (size == 0)
6146 size = 1;
6147 return size;
6148 }
6149
6150 /* Return true if symbol is defined in a regular object file. */
6151
6152 static bfd_boolean
6153 is_static_defined (struct elf_link_hash_entry *h)
6154 {
6155 return ((h->root.type == bfd_link_hash_defined
6156 || h->root.type == bfd_link_hash_defweak)
6157 && h->root.u.def.section != NULL
6158 && h->root.u.def.section->output_section != NULL);
6159 }
6160
6161 /* If FDH is a function descriptor symbol, return the associated code
6162 entry symbol if it is defined. Return NULL otherwise. */
6163
6164 static struct ppc_link_hash_entry *
6165 defined_code_entry (struct ppc_link_hash_entry *fdh)
6166 {
6167 if (fdh->is_func_descriptor)
6168 {
6169 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6170 if (fh->elf.root.type == bfd_link_hash_defined
6171 || fh->elf.root.type == bfd_link_hash_defweak)
6172 return fh;
6173 }
6174 return NULL;
6175 }
6176
6177 /* If FH is a function code entry symbol, return the associated
6178 function descriptor symbol if it is defined. Return NULL otherwise. */
6179
6180 static struct ppc_link_hash_entry *
6181 defined_func_desc (struct ppc_link_hash_entry *fh)
6182 {
6183 if (fh->oh != NULL
6184 && fh->oh->is_func_descriptor)
6185 {
6186 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6187 if (fdh->elf.root.type == bfd_link_hash_defined
6188 || fdh->elf.root.type == bfd_link_hash_defweak)
6189 return fdh;
6190 }
6191 return NULL;
6192 }
6193
6194 /* Mark all our entry sym sections, both opd and code section. */
6195
6196 static void
6197 ppc64_elf_gc_keep (struct bfd_link_info *info)
6198 {
6199 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6200 struct bfd_sym_chain *sym;
6201
6202 if (htab == NULL)
6203 return;
6204
6205 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6206 {
6207 struct ppc_link_hash_entry *eh, *fh;
6208 asection *sec;
6209
6210 eh = (struct ppc_link_hash_entry *)
6211 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6212 if (eh == NULL)
6213 continue;
6214 if (eh->elf.root.type != bfd_link_hash_defined
6215 && eh->elf.root.type != bfd_link_hash_defweak)
6216 continue;
6217
6218 fh = defined_code_entry (eh);
6219 if (fh != NULL)
6220 {
6221 sec = fh->elf.root.u.def.section;
6222 sec->flags |= SEC_KEEP;
6223 }
6224 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6225 && opd_entry_value (eh->elf.root.u.def.section,
6226 eh->elf.root.u.def.value,
6227 &sec, NULL, FALSE) != (bfd_vma) -1)
6228 sec->flags |= SEC_KEEP;
6229
6230 sec = eh->elf.root.u.def.section;
6231 sec->flags |= SEC_KEEP;
6232 }
6233 }
6234
6235 /* Mark sections containing dynamically referenced symbols. When
6236 building shared libraries, we must assume that any visible symbol is
6237 referenced. */
6238
6239 static bfd_boolean
6240 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6241 {
6242 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6243 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6244 struct ppc_link_hash_entry *fdh;
6245 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6246
6247 /* Dynamic linking info is on the func descriptor sym. */
6248 fdh = defined_func_desc (eh);
6249 if (fdh != NULL)
6250 eh = fdh;
6251
6252 if ((eh->elf.root.type == bfd_link_hash_defined
6253 || eh->elf.root.type == bfd_link_hash_defweak)
6254 && (eh->elf.ref_dynamic
6255 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6256 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6257 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6258 && (!info->executable
6259 || info->export_dynamic
6260 || (eh->elf.dynamic
6261 && d != NULL
6262 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6263 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6264 || !bfd_hide_sym_by_version (info->version_info,
6265 eh->elf.root.root.string)))))
6266 {
6267 asection *code_sec;
6268 struct ppc_link_hash_entry *fh;
6269
6270 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6271
6272 /* Function descriptor syms cause the associated
6273 function code sym section to be marked. */
6274 fh = defined_code_entry (eh);
6275 if (fh != NULL)
6276 {
6277 code_sec = fh->elf.root.u.def.section;
6278 code_sec->flags |= SEC_KEEP;
6279 }
6280 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6281 && opd_entry_value (eh->elf.root.u.def.section,
6282 eh->elf.root.u.def.value,
6283 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6284 code_sec->flags |= SEC_KEEP;
6285 }
6286
6287 return TRUE;
6288 }
6289
6290 /* Return the section that should be marked against GC for a given
6291 relocation. */
6292
6293 static asection *
6294 ppc64_elf_gc_mark_hook (asection *sec,
6295 struct bfd_link_info *info,
6296 Elf_Internal_Rela *rel,
6297 struct elf_link_hash_entry *h,
6298 Elf_Internal_Sym *sym)
6299 {
6300 asection *rsec;
6301
6302 /* Syms return NULL if we're marking .opd, so we avoid marking all
6303 function sections, as all functions are referenced in .opd. */
6304 rsec = NULL;
6305 if (get_opd_info (sec) != NULL)
6306 return rsec;
6307
6308 if (h != NULL)
6309 {
6310 enum elf_ppc64_reloc_type r_type;
6311 struct ppc_link_hash_entry *eh, *fh, *fdh;
6312
6313 r_type = ELF64_R_TYPE (rel->r_info);
6314 switch (r_type)
6315 {
6316 case R_PPC64_GNU_VTINHERIT:
6317 case R_PPC64_GNU_VTENTRY:
6318 break;
6319
6320 default:
6321 switch (h->root.type)
6322 {
6323 case bfd_link_hash_defined:
6324 case bfd_link_hash_defweak:
6325 eh = (struct ppc_link_hash_entry *) h;
6326 fdh = defined_func_desc (eh);
6327 if (fdh != NULL)
6328 eh = fdh;
6329
6330 /* Function descriptor syms cause the associated
6331 function code sym section to be marked. */
6332 fh = defined_code_entry (eh);
6333 if (fh != NULL)
6334 {
6335 /* They also mark their opd section. */
6336 eh->elf.root.u.def.section->gc_mark = 1;
6337
6338 rsec = fh->elf.root.u.def.section;
6339 }
6340 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6341 && opd_entry_value (eh->elf.root.u.def.section,
6342 eh->elf.root.u.def.value,
6343 &rsec, NULL, FALSE) != (bfd_vma) -1)
6344 eh->elf.root.u.def.section->gc_mark = 1;
6345 else
6346 rsec = h->root.u.def.section;
6347 break;
6348
6349 case bfd_link_hash_common:
6350 rsec = h->root.u.c.p->section;
6351 break;
6352
6353 default:
6354 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6355 }
6356 }
6357 }
6358 else
6359 {
6360 struct _opd_sec_data *opd;
6361
6362 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6363 opd = get_opd_info (rsec);
6364 if (opd != NULL && opd->func_sec != NULL)
6365 {
6366 rsec->gc_mark = 1;
6367
6368 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6369 }
6370 }
6371
6372 return rsec;
6373 }
6374
6375 /* Update the .got, .plt. and dynamic reloc reference counts for the
6376 section being removed. */
6377
6378 static bfd_boolean
6379 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6380 asection *sec, const Elf_Internal_Rela *relocs)
6381 {
6382 struct ppc_link_hash_table *htab;
6383 Elf_Internal_Shdr *symtab_hdr;
6384 struct elf_link_hash_entry **sym_hashes;
6385 struct got_entry **local_got_ents;
6386 const Elf_Internal_Rela *rel, *relend;
6387
6388 if (info->relocatable)
6389 return TRUE;
6390
6391 if ((sec->flags & SEC_ALLOC) == 0)
6392 return TRUE;
6393
6394 elf_section_data (sec)->local_dynrel = NULL;
6395
6396 htab = ppc_hash_table (info);
6397 if (htab == NULL)
6398 return FALSE;
6399
6400 symtab_hdr = &elf_symtab_hdr (abfd);
6401 sym_hashes = elf_sym_hashes (abfd);
6402 local_got_ents = elf_local_got_ents (abfd);
6403
6404 relend = relocs + sec->reloc_count;
6405 for (rel = relocs; rel < relend; rel++)
6406 {
6407 unsigned long r_symndx;
6408 enum elf_ppc64_reloc_type r_type;
6409 struct elf_link_hash_entry *h = NULL;
6410 unsigned char tls_type = 0;
6411
6412 r_symndx = ELF64_R_SYM (rel->r_info);
6413 r_type = ELF64_R_TYPE (rel->r_info);
6414 if (r_symndx >= symtab_hdr->sh_info)
6415 {
6416 struct ppc_link_hash_entry *eh;
6417 struct elf_dyn_relocs **pp;
6418 struct elf_dyn_relocs *p;
6419
6420 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6421 h = elf_follow_link (h);
6422 eh = (struct ppc_link_hash_entry *) h;
6423
6424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6425 if (p->sec == sec)
6426 {
6427 /* Everything must go for SEC. */
6428 *pp = p->next;
6429 break;
6430 }
6431 }
6432
6433 if (is_branch_reloc (r_type))
6434 {
6435 struct plt_entry **ifunc = NULL;
6436 if (h != NULL)
6437 {
6438 if (h->type == STT_GNU_IFUNC)
6439 ifunc = &h->plt.plist;
6440 }
6441 else if (local_got_ents != NULL)
6442 {
6443 struct plt_entry **local_plt = (struct plt_entry **)
6444 (local_got_ents + symtab_hdr->sh_info);
6445 unsigned char *local_got_tls_masks = (unsigned char *)
6446 (local_plt + symtab_hdr->sh_info);
6447 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6448 ifunc = local_plt + r_symndx;
6449 }
6450 if (ifunc != NULL)
6451 {
6452 struct plt_entry *ent;
6453
6454 for (ent = *ifunc; ent != NULL; ent = ent->next)
6455 if (ent->addend == rel->r_addend)
6456 break;
6457 if (ent == NULL)
6458 abort ();
6459 if (ent->plt.refcount > 0)
6460 ent->plt.refcount -= 1;
6461 continue;
6462 }
6463 }
6464
6465 switch (r_type)
6466 {
6467 case R_PPC64_GOT_TLSLD16:
6468 case R_PPC64_GOT_TLSLD16_LO:
6469 case R_PPC64_GOT_TLSLD16_HI:
6470 case R_PPC64_GOT_TLSLD16_HA:
6471 tls_type = TLS_TLS | TLS_LD;
6472 goto dogot;
6473
6474 case R_PPC64_GOT_TLSGD16:
6475 case R_PPC64_GOT_TLSGD16_LO:
6476 case R_PPC64_GOT_TLSGD16_HI:
6477 case R_PPC64_GOT_TLSGD16_HA:
6478 tls_type = TLS_TLS | TLS_GD;
6479 goto dogot;
6480
6481 case R_PPC64_GOT_TPREL16_DS:
6482 case R_PPC64_GOT_TPREL16_LO_DS:
6483 case R_PPC64_GOT_TPREL16_HI:
6484 case R_PPC64_GOT_TPREL16_HA:
6485 tls_type = TLS_TLS | TLS_TPREL;
6486 goto dogot;
6487
6488 case R_PPC64_GOT_DTPREL16_DS:
6489 case R_PPC64_GOT_DTPREL16_LO_DS:
6490 case R_PPC64_GOT_DTPREL16_HI:
6491 case R_PPC64_GOT_DTPREL16_HA:
6492 tls_type = TLS_TLS | TLS_DTPREL;
6493 goto dogot;
6494
6495 case R_PPC64_GOT16:
6496 case R_PPC64_GOT16_DS:
6497 case R_PPC64_GOT16_HA:
6498 case R_PPC64_GOT16_HI:
6499 case R_PPC64_GOT16_LO:
6500 case R_PPC64_GOT16_LO_DS:
6501 dogot:
6502 {
6503 struct got_entry *ent;
6504
6505 if (h != NULL)
6506 ent = h->got.glist;
6507 else
6508 ent = local_got_ents[r_symndx];
6509
6510 for (; ent != NULL; ent = ent->next)
6511 if (ent->addend == rel->r_addend
6512 && ent->owner == abfd
6513 && ent->tls_type == tls_type)
6514 break;
6515 if (ent == NULL)
6516 abort ();
6517 if (ent->got.refcount > 0)
6518 ent->got.refcount -= 1;
6519 }
6520 break;
6521
6522 case R_PPC64_PLT16_HA:
6523 case R_PPC64_PLT16_HI:
6524 case R_PPC64_PLT16_LO:
6525 case R_PPC64_PLT32:
6526 case R_PPC64_PLT64:
6527 case R_PPC64_REL14:
6528 case R_PPC64_REL14_BRNTAKEN:
6529 case R_PPC64_REL14_BRTAKEN:
6530 case R_PPC64_REL24:
6531 if (h != NULL)
6532 {
6533 struct plt_entry *ent;
6534
6535 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6536 if (ent->addend == rel->r_addend)
6537 break;
6538 if (ent != NULL && ent->plt.refcount > 0)
6539 ent->plt.refcount -= 1;
6540 }
6541 break;
6542
6543 default:
6544 break;
6545 }
6546 }
6547 return TRUE;
6548 }
6549
6550 /* The maximum size of .sfpr. */
6551 #define SFPR_MAX (218*4)
6552
6553 struct sfpr_def_parms
6554 {
6555 const char name[12];
6556 unsigned char lo, hi;
6557 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6558 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6559 };
6560
6561 /* Auto-generate _save*, _rest* functions in .sfpr. */
6562
6563 static bfd_boolean
6564 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6565 {
6566 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6567 unsigned int i;
6568 size_t len = strlen (parm->name);
6569 bfd_boolean writing = FALSE;
6570 char sym[16];
6571
6572 if (htab == NULL)
6573 return FALSE;
6574
6575 memcpy (sym, parm->name, len);
6576 sym[len + 2] = 0;
6577
6578 for (i = parm->lo; i <= parm->hi; i++)
6579 {
6580 struct elf_link_hash_entry *h;
6581
6582 sym[len + 0] = i / 10 + '0';
6583 sym[len + 1] = i % 10 + '0';
6584 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6585 if (h != NULL
6586 && !h->def_regular)
6587 {
6588 h->root.type = bfd_link_hash_defined;
6589 h->root.u.def.section = htab->sfpr;
6590 h->root.u.def.value = htab->sfpr->size;
6591 h->type = STT_FUNC;
6592 h->def_regular = 1;
6593 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6594 writing = TRUE;
6595 if (htab->sfpr->contents == NULL)
6596 {
6597 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6598 if (htab->sfpr->contents == NULL)
6599 return FALSE;
6600 }
6601 }
6602 if (writing)
6603 {
6604 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6605 if (i != parm->hi)
6606 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6607 else
6608 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6609 htab->sfpr->size = p - htab->sfpr->contents;
6610 }
6611 }
6612
6613 return TRUE;
6614 }
6615
6616 static bfd_byte *
6617 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6618 {
6619 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6620 return p + 4;
6621 }
6622
6623 static bfd_byte *
6624 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6625 {
6626 p = savegpr0 (abfd, p, r);
6627 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6628 p = p + 4;
6629 bfd_put_32 (abfd, BLR, p);
6630 return p + 4;
6631 }
6632
6633 static bfd_byte *
6634 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6635 {
6636 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6637 return p + 4;
6638 }
6639
6640 static bfd_byte *
6641 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6642 {
6643 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6644 p = p + 4;
6645 p = restgpr0 (abfd, p, r);
6646 bfd_put_32 (abfd, MTLR_R0, p);
6647 p = p + 4;
6648 if (r == 29)
6649 {
6650 p = restgpr0 (abfd, p, 30);
6651 p = restgpr0 (abfd, p, 31);
6652 }
6653 bfd_put_32 (abfd, BLR, p);
6654 return p + 4;
6655 }
6656
6657 static bfd_byte *
6658 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6659 {
6660 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6661 return p + 4;
6662 }
6663
6664 static bfd_byte *
6665 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6666 {
6667 p = savegpr1 (abfd, p, r);
6668 bfd_put_32 (abfd, BLR, p);
6669 return p + 4;
6670 }
6671
6672 static bfd_byte *
6673 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6674 {
6675 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6676 return p + 4;
6677 }
6678
6679 static bfd_byte *
6680 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6681 {
6682 p = restgpr1 (abfd, p, r);
6683 bfd_put_32 (abfd, BLR, p);
6684 return p + 4;
6685 }
6686
6687 static bfd_byte *
6688 savefpr (bfd *abfd, bfd_byte *p, int r)
6689 {
6690 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6691 return p + 4;
6692 }
6693
6694 static bfd_byte *
6695 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6696 {
6697 p = savefpr (abfd, p, r);
6698 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6699 p = p + 4;
6700 bfd_put_32 (abfd, BLR, p);
6701 return p + 4;
6702 }
6703
6704 static bfd_byte *
6705 restfpr (bfd *abfd, bfd_byte *p, int r)
6706 {
6707 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6708 return p + 4;
6709 }
6710
6711 static bfd_byte *
6712 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6713 {
6714 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6715 p = p + 4;
6716 p = restfpr (abfd, p, r);
6717 bfd_put_32 (abfd, MTLR_R0, p);
6718 p = p + 4;
6719 if (r == 29)
6720 {
6721 p = restfpr (abfd, p, 30);
6722 p = restfpr (abfd, p, 31);
6723 }
6724 bfd_put_32 (abfd, BLR, p);
6725 return p + 4;
6726 }
6727
6728 static bfd_byte *
6729 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6730 {
6731 p = savefpr (abfd, p, r);
6732 bfd_put_32 (abfd, BLR, p);
6733 return p + 4;
6734 }
6735
6736 static bfd_byte *
6737 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6738 {
6739 p = restfpr (abfd, p, r);
6740 bfd_put_32 (abfd, BLR, p);
6741 return p + 4;
6742 }
6743
6744 static bfd_byte *
6745 savevr (bfd *abfd, bfd_byte *p, int r)
6746 {
6747 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6748 p = p + 4;
6749 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6750 return p + 4;
6751 }
6752
6753 static bfd_byte *
6754 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6755 {
6756 p = savevr (abfd, p, r);
6757 bfd_put_32 (abfd, BLR, p);
6758 return p + 4;
6759 }
6760
6761 static bfd_byte *
6762 restvr (bfd *abfd, bfd_byte *p, int r)
6763 {
6764 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6765 p = p + 4;
6766 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6767 return p + 4;
6768 }
6769
6770 static bfd_byte *
6771 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6772 {
6773 p = restvr (abfd, p, r);
6774 bfd_put_32 (abfd, BLR, p);
6775 return p + 4;
6776 }
6777
6778 /* Called via elf_link_hash_traverse to transfer dynamic linking
6779 information on function code symbol entries to their corresponding
6780 function descriptor symbol entries. */
6781
6782 static bfd_boolean
6783 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6784 {
6785 struct bfd_link_info *info;
6786 struct ppc_link_hash_table *htab;
6787 struct plt_entry *ent;
6788 struct ppc_link_hash_entry *fh;
6789 struct ppc_link_hash_entry *fdh;
6790 bfd_boolean force_local;
6791
6792 fh = (struct ppc_link_hash_entry *) h;
6793 if (fh->elf.root.type == bfd_link_hash_indirect)
6794 return TRUE;
6795
6796 info = inf;
6797 htab = ppc_hash_table (info);
6798 if (htab == NULL)
6799 return FALSE;
6800
6801 /* Resolve undefined references to dot-symbols as the value
6802 in the function descriptor, if we have one in a regular object.
6803 This is to satisfy cases like ".quad .foo". Calls to functions
6804 in dynamic objects are handled elsewhere. */
6805 if (fh->elf.root.type == bfd_link_hash_undefweak
6806 && fh->was_undefined
6807 && (fdh = defined_func_desc (fh)) != NULL
6808 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6809 && opd_entry_value (fdh->elf.root.u.def.section,
6810 fdh->elf.root.u.def.value,
6811 &fh->elf.root.u.def.section,
6812 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6813 {
6814 fh->elf.root.type = fdh->elf.root.type;
6815 fh->elf.forced_local = 1;
6816 fh->elf.def_regular = fdh->elf.def_regular;
6817 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6818 }
6819
6820 /* If this is a function code symbol, transfer dynamic linking
6821 information to the function descriptor symbol. */
6822 if (!fh->is_func)
6823 return TRUE;
6824
6825 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6826 if (ent->plt.refcount > 0)
6827 break;
6828 if (ent == NULL
6829 || fh->elf.root.root.string[0] != '.'
6830 || fh->elf.root.root.string[1] == '\0')
6831 return TRUE;
6832
6833 /* Find the corresponding function descriptor symbol. Create it
6834 as undefined if necessary. */
6835
6836 fdh = lookup_fdh (fh, htab);
6837 if (fdh == NULL
6838 && !info->executable
6839 && (fh->elf.root.type == bfd_link_hash_undefined
6840 || fh->elf.root.type == bfd_link_hash_undefweak))
6841 {
6842 fdh = make_fdh (info, fh);
6843 if (fdh == NULL)
6844 return FALSE;
6845 }
6846
6847 /* Fake function descriptors are made undefweak. If the function
6848 code symbol is strong undefined, make the fake sym the same.
6849 If the function code symbol is defined, then force the fake
6850 descriptor local; We can't support overriding of symbols in a
6851 shared library on a fake descriptor. */
6852
6853 if (fdh != NULL
6854 && fdh->fake
6855 && fdh->elf.root.type == bfd_link_hash_undefweak)
6856 {
6857 if (fh->elf.root.type == bfd_link_hash_undefined)
6858 {
6859 fdh->elf.root.type = bfd_link_hash_undefined;
6860 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6861 }
6862 else if (fh->elf.root.type == bfd_link_hash_defined
6863 || fh->elf.root.type == bfd_link_hash_defweak)
6864 {
6865 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6866 }
6867 }
6868
6869 if (fdh != NULL
6870 && !fdh->elf.forced_local
6871 && (!info->executable
6872 || fdh->elf.def_dynamic
6873 || fdh->elf.ref_dynamic
6874 || (fdh->elf.root.type == bfd_link_hash_undefweak
6875 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6876 {
6877 if (fdh->elf.dynindx == -1)
6878 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6879 return FALSE;
6880 fdh->elf.ref_regular |= fh->elf.ref_regular;
6881 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6882 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6883 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6884 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6885 {
6886 move_plt_plist (fh, fdh);
6887 fdh->elf.needs_plt = 1;
6888 }
6889 fdh->is_func_descriptor = 1;
6890 fdh->oh = fh;
6891 fh->oh = fdh;
6892 }
6893
6894 /* Now that the info is on the function descriptor, clear the
6895 function code sym info. Any function code syms for which we
6896 don't have a definition in a regular file, we force local.
6897 This prevents a shared library from exporting syms that have
6898 been imported from another library. Function code syms that
6899 are really in the library we must leave global to prevent the
6900 linker dragging in a definition from a static library. */
6901 force_local = (!fh->elf.def_regular
6902 || fdh == NULL
6903 || !fdh->elf.def_regular
6904 || fdh->elf.forced_local);
6905 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6906
6907 return TRUE;
6908 }
6909
6910 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6911 this hook to a) provide some gcc support functions, and b) transfer
6912 dynamic linking information gathered so far on function code symbol
6913 entries, to their corresponding function descriptor symbol entries. */
6914
6915 static bfd_boolean
6916 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6917 struct bfd_link_info *info)
6918 {
6919 struct ppc_link_hash_table *htab;
6920 unsigned int i;
6921 static const struct sfpr_def_parms funcs[] =
6922 {
6923 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6924 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6925 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6926 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6927 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6928 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6929 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6930 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6931 { "._savef", 14, 31, savefpr, savefpr1_tail },
6932 { "._restf", 14, 31, restfpr, restfpr1_tail },
6933 { "_savevr_", 20, 31, savevr, savevr_tail },
6934 { "_restvr_", 20, 31, restvr, restvr_tail }
6935 };
6936
6937 htab = ppc_hash_table (info);
6938 if (htab == NULL)
6939 return FALSE;
6940
6941 if (!info->relocatable
6942 && htab->elf.hgot != NULL)
6943 {
6944 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6945 /* Make .TOC. defined so as to prevent it being made dynamic.
6946 The wrong value here is fixed later in ppc64_elf_set_toc. */
6947 htab->elf.hgot->type = STT_OBJECT;
6948 htab->elf.hgot->root.type = bfd_link_hash_defined;
6949 htab->elf.hgot->root.u.def.value = 0;
6950 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6951 htab->elf.hgot->def_regular = 1;
6952 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6953 | STV_HIDDEN);
6954 }
6955
6956 if (htab->sfpr == NULL)
6957 /* We don't have any relocs. */
6958 return TRUE;
6959
6960 /* Provide any missing _save* and _rest* functions. */
6961 htab->sfpr->size = 0;
6962 if (htab->params->save_restore_funcs)
6963 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6964 if (!sfpr_define (info, &funcs[i]))
6965 return FALSE;
6966
6967 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6968
6969 if (htab->sfpr->size == 0)
6970 htab->sfpr->flags |= SEC_EXCLUDE;
6971
6972 return TRUE;
6973 }
6974
6975 /* Return true if we have dynamic relocs that apply to read-only sections. */
6976
6977 static bfd_boolean
6978 readonly_dynrelocs (struct elf_link_hash_entry *h)
6979 {
6980 struct ppc_link_hash_entry *eh;
6981 struct elf_dyn_relocs *p;
6982
6983 eh = (struct ppc_link_hash_entry *) h;
6984 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6985 {
6986 asection *s = p->sec->output_section;
6987
6988 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6989 return TRUE;
6990 }
6991 return FALSE;
6992 }
6993
6994 /* Adjust a symbol defined by a dynamic object and referenced by a
6995 regular object. The current definition is in some section of the
6996 dynamic object, but we're not including those sections. We have to
6997 change the definition to something the rest of the link can
6998 understand. */
6999
7000 static bfd_boolean
7001 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7002 struct elf_link_hash_entry *h)
7003 {
7004 struct ppc_link_hash_table *htab;
7005 asection *s;
7006
7007 htab = ppc_hash_table (info);
7008 if (htab == NULL)
7009 return FALSE;
7010
7011 /* Deal with function syms. */
7012 if (h->type == STT_FUNC
7013 || h->type == STT_GNU_IFUNC
7014 || h->needs_plt)
7015 {
7016 /* Clear procedure linkage table information for any symbol that
7017 won't need a .plt entry. */
7018 struct plt_entry *ent;
7019 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7020 if (ent->plt.refcount > 0)
7021 break;
7022 if (ent == NULL
7023 || (h->type != STT_GNU_IFUNC
7024 && (SYMBOL_CALLS_LOCAL (info, h)
7025 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7026 && h->root.type == bfd_link_hash_undefweak))))
7027 {
7028 h->plt.plist = NULL;
7029 h->needs_plt = 0;
7030 h->pointer_equality_needed = 0;
7031 }
7032 else if (abiversion (info->output_bfd) == 2)
7033 {
7034 /* Taking a function's address in a read/write section
7035 doesn't require us to define the function symbol in the
7036 executable on a global entry stub. A dynamic reloc can
7037 be used instead. */
7038 if (h->pointer_equality_needed
7039 && h->type != STT_GNU_IFUNC
7040 && !readonly_dynrelocs (h))
7041 {
7042 h->pointer_equality_needed = 0;
7043 h->non_got_ref = 0;
7044 }
7045
7046 /* After adjust_dynamic_symbol, non_got_ref set in the
7047 non-shared case means that we have allocated space in
7048 .dynbss for the symbol and thus dyn_relocs for this
7049 symbol should be discarded.
7050 If we get here we know we are making a PLT entry for this
7051 symbol, and in an executable we'd normally resolve
7052 relocations against this symbol to the PLT entry. Allow
7053 dynamic relocs if the reference is weak, and the dynamic
7054 relocs will not cause text relocation. */
7055 else if (!h->ref_regular_nonweak
7056 && h->non_got_ref
7057 && h->type != STT_GNU_IFUNC
7058 && !readonly_dynrelocs (h))
7059 h->non_got_ref = 0;
7060
7061 /* If making a plt entry, then we don't need copy relocs. */
7062 return TRUE;
7063 }
7064 }
7065 else
7066 h->plt.plist = NULL;
7067
7068 /* If this is a weak symbol, and there is a real definition, the
7069 processor independent code will have arranged for us to see the
7070 real definition first, and we can just use the same value. */
7071 if (h->u.weakdef != NULL)
7072 {
7073 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7074 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7075 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7076 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7077 if (ELIMINATE_COPY_RELOCS)
7078 h->non_got_ref = h->u.weakdef->non_got_ref;
7079 return TRUE;
7080 }
7081
7082 /* If we are creating a shared library, we must presume that the
7083 only references to the symbol are via the global offset table.
7084 For such cases we need not do anything here; the relocations will
7085 be handled correctly by relocate_section. */
7086 if (info->shared)
7087 return TRUE;
7088
7089 /* If there are no references to this symbol that do not use the
7090 GOT, we don't need to generate a copy reloc. */
7091 if (!h->non_got_ref)
7092 return TRUE;
7093
7094 /* Don't generate a copy reloc for symbols defined in the executable. */
7095 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7096 return TRUE;
7097
7098 /* If -z nocopyreloc was given, don't generate them either. */
7099 if (info->nocopyreloc)
7100 {
7101 h->non_got_ref = 0;
7102 return TRUE;
7103 }
7104
7105 /* If we didn't find any dynamic relocs in read-only sections, then
7106 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7107 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7108 {
7109 h->non_got_ref = 0;
7110 return TRUE;
7111 }
7112
7113 /* Protected variables do not work with .dynbss. The copy in
7114 .dynbss won't be used by the shared library with the protected
7115 definition for the variable. Text relocations are preferable
7116 to an incorrect program. */
7117 if (h->protected_def)
7118 {
7119 h->non_got_ref = 0;
7120 return TRUE;
7121 }
7122
7123 if (h->plt.plist != NULL)
7124 {
7125 /* We should never get here, but unfortunately there are versions
7126 of gcc out there that improperly (for this ABI) put initialized
7127 function pointers, vtable refs and suchlike in read-only
7128 sections. Allow them to proceed, but warn that this might
7129 break at runtime. */
7130 info->callbacks->einfo
7131 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7132 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7133 h->root.root.string);
7134 }
7135
7136 /* This is a reference to a symbol defined by a dynamic object which
7137 is not a function. */
7138
7139 /* We must allocate the symbol in our .dynbss section, which will
7140 become part of the .bss section of the executable. There will be
7141 an entry for this symbol in the .dynsym section. The dynamic
7142 object will contain position independent code, so all references
7143 from the dynamic object to this symbol will go through the global
7144 offset table. The dynamic linker will use the .dynsym entry to
7145 determine the address it must put in the global offset table, so
7146 both the dynamic object and the regular object will refer to the
7147 same memory location for the variable. */
7148
7149 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7150 to copy the initial value out of the dynamic object and into the
7151 runtime process image. We need to remember the offset into the
7152 .rela.bss section we are going to use. */
7153 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7154 {
7155 htab->relbss->size += sizeof (Elf64_External_Rela);
7156 h->needs_copy = 1;
7157 }
7158
7159 s = htab->dynbss;
7160
7161 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7162 }
7163
7164 /* If given a function descriptor symbol, hide both the function code
7165 sym and the descriptor. */
7166 static void
7167 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7168 struct elf_link_hash_entry *h,
7169 bfd_boolean force_local)
7170 {
7171 struct ppc_link_hash_entry *eh;
7172 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7173
7174 eh = (struct ppc_link_hash_entry *) h;
7175 if (eh->is_func_descriptor)
7176 {
7177 struct ppc_link_hash_entry *fh = eh->oh;
7178
7179 if (fh == NULL)
7180 {
7181 const char *p, *q;
7182 struct ppc_link_hash_table *htab;
7183 char save;
7184
7185 /* We aren't supposed to use alloca in BFD because on
7186 systems which do not have alloca the version in libiberty
7187 calls xmalloc, which might cause the program to crash
7188 when it runs out of memory. This function doesn't have a
7189 return status, so there's no way to gracefully return an
7190 error. So cheat. We know that string[-1] can be safely
7191 accessed; It's either a string in an ELF string table,
7192 or allocated in an objalloc structure. */
7193
7194 p = eh->elf.root.root.string - 1;
7195 save = *p;
7196 *(char *) p = '.';
7197 htab = ppc_hash_table (info);
7198 if (htab == NULL)
7199 return;
7200
7201 fh = (struct ppc_link_hash_entry *)
7202 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7203 *(char *) p = save;
7204
7205 /* Unfortunately, if it so happens that the string we were
7206 looking for was allocated immediately before this string,
7207 then we overwrote the string terminator. That's the only
7208 reason the lookup should fail. */
7209 if (fh == NULL)
7210 {
7211 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7212 while (q >= eh->elf.root.root.string && *q == *p)
7213 --q, --p;
7214 if (q < eh->elf.root.root.string && *p == '.')
7215 fh = (struct ppc_link_hash_entry *)
7216 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7217 }
7218 if (fh != NULL)
7219 {
7220 eh->oh = fh;
7221 fh->oh = eh;
7222 }
7223 }
7224 if (fh != NULL)
7225 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7226 }
7227 }
7228
7229 static bfd_boolean
7230 get_sym_h (struct elf_link_hash_entry **hp,
7231 Elf_Internal_Sym **symp,
7232 asection **symsecp,
7233 unsigned char **tls_maskp,
7234 Elf_Internal_Sym **locsymsp,
7235 unsigned long r_symndx,
7236 bfd *ibfd)
7237 {
7238 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7239
7240 if (r_symndx >= symtab_hdr->sh_info)
7241 {
7242 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7243 struct elf_link_hash_entry *h;
7244
7245 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7246 h = elf_follow_link (h);
7247
7248 if (hp != NULL)
7249 *hp = h;
7250
7251 if (symp != NULL)
7252 *symp = NULL;
7253
7254 if (symsecp != NULL)
7255 {
7256 asection *symsec = NULL;
7257 if (h->root.type == bfd_link_hash_defined
7258 || h->root.type == bfd_link_hash_defweak)
7259 symsec = h->root.u.def.section;
7260 *symsecp = symsec;
7261 }
7262
7263 if (tls_maskp != NULL)
7264 {
7265 struct ppc_link_hash_entry *eh;
7266
7267 eh = (struct ppc_link_hash_entry *) h;
7268 *tls_maskp = &eh->tls_mask;
7269 }
7270 }
7271 else
7272 {
7273 Elf_Internal_Sym *sym;
7274 Elf_Internal_Sym *locsyms = *locsymsp;
7275
7276 if (locsyms == NULL)
7277 {
7278 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7279 if (locsyms == NULL)
7280 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7281 symtab_hdr->sh_info,
7282 0, NULL, NULL, NULL);
7283 if (locsyms == NULL)
7284 return FALSE;
7285 *locsymsp = locsyms;
7286 }
7287 sym = locsyms + r_symndx;
7288
7289 if (hp != NULL)
7290 *hp = NULL;
7291
7292 if (symp != NULL)
7293 *symp = sym;
7294
7295 if (symsecp != NULL)
7296 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7297
7298 if (tls_maskp != NULL)
7299 {
7300 struct got_entry **lgot_ents;
7301 unsigned char *tls_mask;
7302
7303 tls_mask = NULL;
7304 lgot_ents = elf_local_got_ents (ibfd);
7305 if (lgot_ents != NULL)
7306 {
7307 struct plt_entry **local_plt = (struct plt_entry **)
7308 (lgot_ents + symtab_hdr->sh_info);
7309 unsigned char *lgot_masks = (unsigned char *)
7310 (local_plt + symtab_hdr->sh_info);
7311 tls_mask = &lgot_masks[r_symndx];
7312 }
7313 *tls_maskp = tls_mask;
7314 }
7315 }
7316 return TRUE;
7317 }
7318
7319 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7320 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7321 type suitable for optimization, and 1 otherwise. */
7322
7323 static int
7324 get_tls_mask (unsigned char **tls_maskp,
7325 unsigned long *toc_symndx,
7326 bfd_vma *toc_addend,
7327 Elf_Internal_Sym **locsymsp,
7328 const Elf_Internal_Rela *rel,
7329 bfd *ibfd)
7330 {
7331 unsigned long r_symndx;
7332 int next_r;
7333 struct elf_link_hash_entry *h;
7334 Elf_Internal_Sym *sym;
7335 asection *sec;
7336 bfd_vma off;
7337
7338 r_symndx = ELF64_R_SYM (rel->r_info);
7339 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7340 return 0;
7341
7342 if ((*tls_maskp != NULL && **tls_maskp != 0)
7343 || sec == NULL
7344 || ppc64_elf_section_data (sec) == NULL
7345 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7346 return 1;
7347
7348 /* Look inside a TOC section too. */
7349 if (h != NULL)
7350 {
7351 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7352 off = h->root.u.def.value;
7353 }
7354 else
7355 off = sym->st_value;
7356 off += rel->r_addend;
7357 BFD_ASSERT (off % 8 == 0);
7358 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7359 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7360 if (toc_symndx != NULL)
7361 *toc_symndx = r_symndx;
7362 if (toc_addend != NULL)
7363 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7364 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7365 return 0;
7366 if ((h == NULL || is_static_defined (h))
7367 && (next_r == -1 || next_r == -2))
7368 return 1 - next_r;
7369 return 1;
7370 }
7371
7372 /* Find (or create) an entry in the tocsave hash table. */
7373
7374 static struct tocsave_entry *
7375 tocsave_find (struct ppc_link_hash_table *htab,
7376 enum insert_option insert,
7377 Elf_Internal_Sym **local_syms,
7378 const Elf_Internal_Rela *irela,
7379 bfd *ibfd)
7380 {
7381 unsigned long r_indx;
7382 struct elf_link_hash_entry *h;
7383 Elf_Internal_Sym *sym;
7384 struct tocsave_entry ent, *p;
7385 hashval_t hash;
7386 struct tocsave_entry **slot;
7387
7388 r_indx = ELF64_R_SYM (irela->r_info);
7389 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7390 return NULL;
7391 if (ent.sec == NULL || ent.sec->output_section == NULL)
7392 {
7393 (*_bfd_error_handler)
7394 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7395 return NULL;
7396 }
7397
7398 if (h != NULL)
7399 ent.offset = h->root.u.def.value;
7400 else
7401 ent.offset = sym->st_value;
7402 ent.offset += irela->r_addend;
7403
7404 hash = tocsave_htab_hash (&ent);
7405 slot = ((struct tocsave_entry **)
7406 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7407 if (slot == NULL)
7408 return NULL;
7409
7410 if (*slot == NULL)
7411 {
7412 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7413 if (p == NULL)
7414 return NULL;
7415 *p = ent;
7416 *slot = p;
7417 }
7418 return *slot;
7419 }
7420
7421 /* Adjust all global syms defined in opd sections. In gcc generated
7422 code for the old ABI, these will already have been done. */
7423
7424 static bfd_boolean
7425 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7426 {
7427 struct ppc_link_hash_entry *eh;
7428 asection *sym_sec;
7429 struct _opd_sec_data *opd;
7430
7431 if (h->root.type == bfd_link_hash_indirect)
7432 return TRUE;
7433
7434 if (h->root.type != bfd_link_hash_defined
7435 && h->root.type != bfd_link_hash_defweak)
7436 return TRUE;
7437
7438 eh = (struct ppc_link_hash_entry *) h;
7439 if (eh->adjust_done)
7440 return TRUE;
7441
7442 sym_sec = eh->elf.root.u.def.section;
7443 opd = get_opd_info (sym_sec);
7444 if (opd != NULL && opd->adjust != NULL)
7445 {
7446 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7447 if (adjust == -1)
7448 {
7449 /* This entry has been deleted. */
7450 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7451 if (dsec == NULL)
7452 {
7453 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7454 if (discarded_section (dsec))
7455 {
7456 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7457 break;
7458 }
7459 }
7460 eh->elf.root.u.def.value = 0;
7461 eh->elf.root.u.def.section = dsec;
7462 }
7463 else
7464 eh->elf.root.u.def.value += adjust;
7465 eh->adjust_done = 1;
7466 }
7467 return TRUE;
7468 }
7469
7470 /* Handles decrementing dynamic reloc counts for the reloc specified by
7471 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7472 have already been determined. */
7473
7474 static bfd_boolean
7475 dec_dynrel_count (bfd_vma r_info,
7476 asection *sec,
7477 struct bfd_link_info *info,
7478 Elf_Internal_Sym **local_syms,
7479 struct elf_link_hash_entry *h,
7480 Elf_Internal_Sym *sym)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 asection *sym_sec = NULL;
7484
7485 /* Can this reloc be dynamic? This switch, and later tests here
7486 should be kept in sync with the code in check_relocs. */
7487 r_type = ELF64_R_TYPE (r_info);
7488 switch (r_type)
7489 {
7490 default:
7491 return TRUE;
7492
7493 case R_PPC64_TPREL16:
7494 case R_PPC64_TPREL16_LO:
7495 case R_PPC64_TPREL16_HI:
7496 case R_PPC64_TPREL16_HA:
7497 case R_PPC64_TPREL16_DS:
7498 case R_PPC64_TPREL16_LO_DS:
7499 case R_PPC64_TPREL16_HIGH:
7500 case R_PPC64_TPREL16_HIGHA:
7501 case R_PPC64_TPREL16_HIGHER:
7502 case R_PPC64_TPREL16_HIGHERA:
7503 case R_PPC64_TPREL16_HIGHEST:
7504 case R_PPC64_TPREL16_HIGHESTA:
7505 if (!info->shared)
7506 return TRUE;
7507
7508 case R_PPC64_TPREL64:
7509 case R_PPC64_DTPMOD64:
7510 case R_PPC64_DTPREL64:
7511 case R_PPC64_ADDR64:
7512 case R_PPC64_REL30:
7513 case R_PPC64_REL32:
7514 case R_PPC64_REL64:
7515 case R_PPC64_ADDR14:
7516 case R_PPC64_ADDR14_BRNTAKEN:
7517 case R_PPC64_ADDR14_BRTAKEN:
7518 case R_PPC64_ADDR16:
7519 case R_PPC64_ADDR16_DS:
7520 case R_PPC64_ADDR16_HA:
7521 case R_PPC64_ADDR16_HI:
7522 case R_PPC64_ADDR16_HIGH:
7523 case R_PPC64_ADDR16_HIGHA:
7524 case R_PPC64_ADDR16_HIGHER:
7525 case R_PPC64_ADDR16_HIGHERA:
7526 case R_PPC64_ADDR16_HIGHEST:
7527 case R_PPC64_ADDR16_HIGHESTA:
7528 case R_PPC64_ADDR16_LO:
7529 case R_PPC64_ADDR16_LO_DS:
7530 case R_PPC64_ADDR24:
7531 case R_PPC64_ADDR32:
7532 case R_PPC64_UADDR16:
7533 case R_PPC64_UADDR32:
7534 case R_PPC64_UADDR64:
7535 case R_PPC64_TOC:
7536 break;
7537 }
7538
7539 if (local_syms != NULL)
7540 {
7541 unsigned long r_symndx;
7542 bfd *ibfd = sec->owner;
7543
7544 r_symndx = ELF64_R_SYM (r_info);
7545 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7546 return FALSE;
7547 }
7548
7549 if ((info->shared
7550 && (must_be_dyn_reloc (info, r_type)
7551 || (h != NULL
7552 && (!SYMBOLIC_BIND (info, h)
7553 || h->root.type == bfd_link_hash_defweak
7554 || !h->def_regular))))
7555 || (ELIMINATE_COPY_RELOCS
7556 && !info->shared
7557 && h != NULL
7558 && (h->root.type == bfd_link_hash_defweak
7559 || !h->def_regular)))
7560 ;
7561 else
7562 return TRUE;
7563
7564 if (h != NULL)
7565 {
7566 struct elf_dyn_relocs *p;
7567 struct elf_dyn_relocs **pp;
7568 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7569
7570 /* elf_gc_sweep may have already removed all dyn relocs associated
7571 with local syms for a given section. Also, symbol flags are
7572 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7573 report a dynreloc miscount. */
7574 if (*pp == NULL && info->gc_sections)
7575 return TRUE;
7576
7577 while ((p = *pp) != NULL)
7578 {
7579 if (p->sec == sec)
7580 {
7581 if (!must_be_dyn_reloc (info, r_type))
7582 p->pc_count -= 1;
7583 p->count -= 1;
7584 if (p->count == 0)
7585 *pp = p->next;
7586 return TRUE;
7587 }
7588 pp = &p->next;
7589 }
7590 }
7591 else
7592 {
7593 struct ppc_dyn_relocs *p;
7594 struct ppc_dyn_relocs **pp;
7595 void *vpp;
7596 bfd_boolean is_ifunc;
7597
7598 if (local_syms == NULL)
7599 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7600 if (sym_sec == NULL)
7601 sym_sec = sec;
7602
7603 vpp = &elf_section_data (sym_sec)->local_dynrel;
7604 pp = (struct ppc_dyn_relocs **) vpp;
7605
7606 if (*pp == NULL && info->gc_sections)
7607 return TRUE;
7608
7609 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7610 while ((p = *pp) != NULL)
7611 {
7612 if (p->sec == sec && p->ifunc == is_ifunc)
7613 {
7614 p->count -= 1;
7615 if (p->count == 0)
7616 *pp = p->next;
7617 return TRUE;
7618 }
7619 pp = &p->next;
7620 }
7621 }
7622
7623 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7624 sec->owner, sec);
7625 bfd_set_error (bfd_error_bad_value);
7626 return FALSE;
7627 }
7628
7629 /* Remove unused Official Procedure Descriptor entries. Currently we
7630 only remove those associated with functions in discarded link-once
7631 sections, or weakly defined functions that have been overridden. It
7632 would be possible to remove many more entries for statically linked
7633 applications. */
7634
7635 bfd_boolean
7636 ppc64_elf_edit_opd (struct bfd_link_info *info)
7637 {
7638 bfd *ibfd;
7639 bfd_boolean some_edited = FALSE;
7640 asection *need_pad = NULL;
7641 struct ppc_link_hash_table *htab;
7642
7643 htab = ppc_hash_table (info);
7644 if (htab == NULL)
7645 return FALSE;
7646
7647 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7648 {
7649 asection *sec;
7650 Elf_Internal_Rela *relstart, *rel, *relend;
7651 Elf_Internal_Shdr *symtab_hdr;
7652 Elf_Internal_Sym *local_syms;
7653 struct _opd_sec_data *opd;
7654 bfd_boolean need_edit, add_aux_fields, broken;
7655 bfd_size_type cnt_16b = 0;
7656
7657 if (!is_ppc64_elf (ibfd))
7658 continue;
7659
7660 sec = bfd_get_section_by_name (ibfd, ".opd");
7661 if (sec == NULL || sec->size == 0)
7662 continue;
7663
7664 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7665 continue;
7666
7667 if (sec->output_section == bfd_abs_section_ptr)
7668 continue;
7669
7670 /* Look through the section relocs. */
7671 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7672 continue;
7673
7674 local_syms = NULL;
7675 symtab_hdr = &elf_symtab_hdr (ibfd);
7676
7677 /* Read the relocations. */
7678 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7679 info->keep_memory);
7680 if (relstart == NULL)
7681 return FALSE;
7682
7683 /* First run through the relocs to check they are sane, and to
7684 determine whether we need to edit this opd section. */
7685 need_edit = FALSE;
7686 broken = FALSE;
7687 need_pad = sec;
7688 relend = relstart + sec->reloc_count;
7689 for (rel = relstart; rel < relend; )
7690 {
7691 enum elf_ppc64_reloc_type r_type;
7692 unsigned long r_symndx;
7693 asection *sym_sec;
7694 struct elf_link_hash_entry *h;
7695 Elf_Internal_Sym *sym;
7696 bfd_vma offset;
7697
7698 /* .opd contains an array of 16 or 24 byte entries. We're
7699 only interested in the reloc pointing to a function entry
7700 point. */
7701 offset = rel->r_offset;
7702 if (rel + 1 == relend
7703 || rel[1].r_offset != offset + 8)
7704 {
7705 /* If someone messes with .opd alignment then after a
7706 "ld -r" we might have padding in the middle of .opd.
7707 Also, there's nothing to prevent someone putting
7708 something silly in .opd with the assembler. No .opd
7709 optimization for them! */
7710 broken_opd:
7711 (*_bfd_error_handler)
7712 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7713 broken = TRUE;
7714 break;
7715 }
7716
7717 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7718 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7719 {
7720 (*_bfd_error_handler)
7721 (_("%B: unexpected reloc type %u in .opd section"),
7722 ibfd, r_type);
7723 broken = TRUE;
7724 break;
7725 }
7726
7727 r_symndx = ELF64_R_SYM (rel->r_info);
7728 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7729 r_symndx, ibfd))
7730 goto error_ret;
7731
7732 if (sym_sec == NULL || sym_sec->owner == NULL)
7733 {
7734 const char *sym_name;
7735 if (h != NULL)
7736 sym_name = h->root.root.string;
7737 else
7738 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7739 sym_sec);
7740
7741 (*_bfd_error_handler)
7742 (_("%B: undefined sym `%s' in .opd section"),
7743 ibfd, sym_name);
7744 broken = TRUE;
7745 break;
7746 }
7747
7748 /* opd entries are always for functions defined in the
7749 current input bfd. If the symbol isn't defined in the
7750 input bfd, then we won't be using the function in this
7751 bfd; It must be defined in a linkonce section in another
7752 bfd, or is weak. It's also possible that we are
7753 discarding the function due to a linker script /DISCARD/,
7754 which we test for via the output_section. */
7755 if (sym_sec->owner != ibfd
7756 || sym_sec->output_section == bfd_abs_section_ptr)
7757 need_edit = TRUE;
7758
7759 rel += 2;
7760 if (rel + 1 == relend
7761 || (rel + 2 < relend
7762 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7763 ++rel;
7764
7765 if (rel == relend)
7766 {
7767 if (sec->size == offset + 24)
7768 {
7769 need_pad = NULL;
7770 break;
7771 }
7772 if (sec->size == offset + 16)
7773 {
7774 cnt_16b++;
7775 break;
7776 }
7777 goto broken_opd;
7778 }
7779 else if (rel + 1 < relend
7780 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7781 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7782 {
7783 if (rel[0].r_offset == offset + 16)
7784 cnt_16b++;
7785 else if (rel[0].r_offset != offset + 24)
7786 goto broken_opd;
7787 }
7788 else
7789 goto broken_opd;
7790 }
7791
7792 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7793
7794 if (!broken && (need_edit || add_aux_fields))
7795 {
7796 Elf_Internal_Rela *write_rel;
7797 Elf_Internal_Shdr *rel_hdr;
7798 bfd_byte *rptr, *wptr;
7799 bfd_byte *new_contents;
7800 bfd_size_type amt;
7801
7802 new_contents = NULL;
7803 amt = OPD_NDX (sec->size) * sizeof (long);
7804 opd = &ppc64_elf_section_data (sec)->u.opd;
7805 opd->adjust = bfd_zalloc (sec->owner, amt);
7806 if (opd->adjust == NULL)
7807 return FALSE;
7808 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7809
7810 /* This seems a waste of time as input .opd sections are all
7811 zeros as generated by gcc, but I suppose there's no reason
7812 this will always be so. We might start putting something in
7813 the third word of .opd entries. */
7814 if ((sec->flags & SEC_IN_MEMORY) == 0)
7815 {
7816 bfd_byte *loc;
7817 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7818 {
7819 if (loc != NULL)
7820 free (loc);
7821 error_ret:
7822 if (local_syms != NULL
7823 && symtab_hdr->contents != (unsigned char *) local_syms)
7824 free (local_syms);
7825 if (elf_section_data (sec)->relocs != relstart)
7826 free (relstart);
7827 return FALSE;
7828 }
7829 sec->contents = loc;
7830 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7831 }
7832
7833 elf_section_data (sec)->relocs = relstart;
7834
7835 new_contents = sec->contents;
7836 if (add_aux_fields)
7837 {
7838 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7839 if (new_contents == NULL)
7840 return FALSE;
7841 need_pad = NULL;
7842 }
7843 wptr = new_contents;
7844 rptr = sec->contents;
7845 write_rel = relstart;
7846 for (rel = relstart; rel < relend; )
7847 {
7848 unsigned long r_symndx;
7849 asection *sym_sec;
7850 struct elf_link_hash_entry *h;
7851 struct ppc_link_hash_entry *fdh = NULL;
7852 Elf_Internal_Sym *sym;
7853 long opd_ent_size;
7854 Elf_Internal_Rela *next_rel;
7855 bfd_boolean skip;
7856
7857 r_symndx = ELF64_R_SYM (rel->r_info);
7858 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7859 r_symndx, ibfd))
7860 goto error_ret;
7861
7862 next_rel = rel + 2;
7863 if (next_rel + 1 == relend
7864 || (next_rel + 2 < relend
7865 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7866 ++next_rel;
7867
7868 /* See if the .opd entry is full 24 byte or
7869 16 byte (with fd_aux entry overlapped with next
7870 fd_func). */
7871 opd_ent_size = 24;
7872 if (next_rel == relend)
7873 {
7874 if (sec->size == rel->r_offset + 16)
7875 opd_ent_size = 16;
7876 }
7877 else if (next_rel->r_offset == rel->r_offset + 16)
7878 opd_ent_size = 16;
7879
7880 if (h != NULL
7881 && h->root.root.string[0] == '.')
7882 {
7883 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7884 if (fdh != NULL
7885 && fdh->elf.root.type != bfd_link_hash_defined
7886 && fdh->elf.root.type != bfd_link_hash_defweak)
7887 fdh = NULL;
7888 }
7889
7890 skip = (sym_sec->owner != ibfd
7891 || sym_sec->output_section == bfd_abs_section_ptr);
7892 if (skip)
7893 {
7894 if (fdh != NULL && sym_sec->owner == ibfd)
7895 {
7896 /* Arrange for the function descriptor sym
7897 to be dropped. */
7898 fdh->elf.root.u.def.value = 0;
7899 fdh->elf.root.u.def.section = sym_sec;
7900 }
7901 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
7902
7903 if (NO_OPD_RELOCS || info->relocatable)
7904 rel = next_rel;
7905 else
7906 while (1)
7907 {
7908 if (!dec_dynrel_count (rel->r_info, sec, info,
7909 NULL, h, sym))
7910 goto error_ret;
7911
7912 if (++rel == next_rel)
7913 break;
7914
7915 r_symndx = ELF64_R_SYM (rel->r_info);
7916 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7917 r_symndx, ibfd))
7918 goto error_ret;
7919 }
7920 }
7921 else
7922 {
7923 /* We'll be keeping this opd entry. */
7924 long adjust;
7925
7926 if (fdh != NULL)
7927 {
7928 /* Redefine the function descriptor symbol to
7929 this location in the opd section. It is
7930 necessary to update the value here rather
7931 than using an array of adjustments as we do
7932 for local symbols, because various places
7933 in the generic ELF code use the value
7934 stored in u.def.value. */
7935 fdh->elf.root.u.def.value = wptr - new_contents;
7936 fdh->adjust_done = 1;
7937 }
7938
7939 /* Local syms are a bit tricky. We could
7940 tweak them as they can be cached, but
7941 we'd need to look through the local syms
7942 for the function descriptor sym which we
7943 don't have at the moment. So keep an
7944 array of adjustments. */
7945 adjust = (wptr - new_contents) - (rptr - sec->contents);
7946 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
7947
7948 if (wptr != rptr)
7949 memcpy (wptr, rptr, opd_ent_size);
7950 wptr += opd_ent_size;
7951 if (add_aux_fields && opd_ent_size == 16)
7952 {
7953 memset (wptr, '\0', 8);
7954 wptr += 8;
7955 }
7956
7957 /* We need to adjust any reloc offsets to point to the
7958 new opd entries. */
7959 for ( ; rel != next_rel; ++rel)
7960 {
7961 rel->r_offset += adjust;
7962 if (write_rel != rel)
7963 memcpy (write_rel, rel, sizeof (*rel));
7964 ++write_rel;
7965 }
7966 }
7967
7968 rptr += opd_ent_size;
7969 }
7970
7971 sec->size = wptr - new_contents;
7972 sec->reloc_count = write_rel - relstart;
7973 if (add_aux_fields)
7974 {
7975 free (sec->contents);
7976 sec->contents = new_contents;
7977 }
7978
7979 /* Fudge the header size too, as this is used later in
7980 elf_bfd_final_link if we are emitting relocs. */
7981 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7982 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7983 some_edited = TRUE;
7984 }
7985 else if (elf_section_data (sec)->relocs != relstart)
7986 free (relstart);
7987
7988 if (local_syms != NULL
7989 && symtab_hdr->contents != (unsigned char *) local_syms)
7990 {
7991 if (!info->keep_memory)
7992 free (local_syms);
7993 else
7994 symtab_hdr->contents = (unsigned char *) local_syms;
7995 }
7996 }
7997
7998 if (some_edited)
7999 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8000
8001 /* If we are doing a final link and the last .opd entry is just 16 byte
8002 long, add a 8 byte padding after it. */
8003 if (need_pad != NULL && !info->relocatable)
8004 {
8005 bfd_byte *p;
8006
8007 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8008 {
8009 BFD_ASSERT (need_pad->size > 0);
8010
8011 p = bfd_malloc (need_pad->size + 8);
8012 if (p == NULL)
8013 return FALSE;
8014
8015 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8016 p, 0, need_pad->size))
8017 return FALSE;
8018
8019 need_pad->contents = p;
8020 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8021 }
8022 else
8023 {
8024 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8025 if (p == NULL)
8026 return FALSE;
8027
8028 need_pad->contents = p;
8029 }
8030
8031 memset (need_pad->contents + need_pad->size, 0, 8);
8032 need_pad->size += 8;
8033 }
8034
8035 return TRUE;
8036 }
8037
8038 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8039
8040 asection *
8041 ppc64_elf_tls_setup (struct bfd_link_info *info)
8042 {
8043 struct ppc_link_hash_table *htab;
8044
8045 htab = ppc_hash_table (info);
8046 if (htab == NULL)
8047 return NULL;
8048
8049 if (abiversion (info->output_bfd) == 1)
8050 htab->opd_abi = 1;
8051
8052 if (htab->params->no_multi_toc)
8053 htab->do_multi_toc = 0;
8054 else if (!htab->do_multi_toc)
8055 htab->params->no_multi_toc = 1;
8056
8057 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8058 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8059 FALSE, FALSE, TRUE));
8060 /* Move dynamic linking info to the function descriptor sym. */
8061 if (htab->tls_get_addr != NULL)
8062 func_desc_adjust (&htab->tls_get_addr->elf, info);
8063 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8064 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8065 FALSE, FALSE, TRUE));
8066 if (!htab->params->no_tls_get_addr_opt)
8067 {
8068 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8069
8070 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8071 FALSE, FALSE, TRUE);
8072 if (opt != NULL)
8073 func_desc_adjust (opt, info);
8074 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8075 FALSE, FALSE, TRUE);
8076 if (opt_fd != NULL
8077 && (opt_fd->root.type == bfd_link_hash_defined
8078 || opt_fd->root.type == bfd_link_hash_defweak))
8079 {
8080 /* If glibc supports an optimized __tls_get_addr call stub,
8081 signalled by the presence of __tls_get_addr_opt, and we'll
8082 be calling __tls_get_addr via a plt call stub, then
8083 make __tls_get_addr point to __tls_get_addr_opt. */
8084 tga_fd = &htab->tls_get_addr_fd->elf;
8085 if (htab->elf.dynamic_sections_created
8086 && tga_fd != NULL
8087 && (tga_fd->type == STT_FUNC
8088 || tga_fd->needs_plt)
8089 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8090 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8091 && tga_fd->root.type == bfd_link_hash_undefweak)))
8092 {
8093 struct plt_entry *ent;
8094
8095 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8096 if (ent->plt.refcount > 0)
8097 break;
8098 if (ent != NULL)
8099 {
8100 tga_fd->root.type = bfd_link_hash_indirect;
8101 tga_fd->root.u.i.link = &opt_fd->root;
8102 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8103 if (opt_fd->dynindx != -1)
8104 {
8105 /* Use __tls_get_addr_opt in dynamic relocations. */
8106 opt_fd->dynindx = -1;
8107 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8108 opt_fd->dynstr_index);
8109 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8110 return NULL;
8111 }
8112 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8113 tga = &htab->tls_get_addr->elf;
8114 if (opt != NULL && tga != NULL)
8115 {
8116 tga->root.type = bfd_link_hash_indirect;
8117 tga->root.u.i.link = &opt->root;
8118 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8119 _bfd_elf_link_hash_hide_symbol (info, opt,
8120 tga->forced_local);
8121 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8122 }
8123 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8124 htab->tls_get_addr_fd->is_func_descriptor = 1;
8125 if (htab->tls_get_addr != NULL)
8126 {
8127 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8128 htab->tls_get_addr->is_func = 1;
8129 }
8130 }
8131 }
8132 }
8133 else
8134 htab->params->no_tls_get_addr_opt = TRUE;
8135 }
8136 return _bfd_elf_tls_setup (info->output_bfd, info);
8137 }
8138
8139 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8140 HASH1 or HASH2. */
8141
8142 static bfd_boolean
8143 branch_reloc_hash_match (const bfd *ibfd,
8144 const Elf_Internal_Rela *rel,
8145 const struct ppc_link_hash_entry *hash1,
8146 const struct ppc_link_hash_entry *hash2)
8147 {
8148 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8149 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8150 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8151
8152 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8153 {
8154 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8155 struct elf_link_hash_entry *h;
8156
8157 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8158 h = elf_follow_link (h);
8159 if (h == &hash1->elf || h == &hash2->elf)
8160 return TRUE;
8161 }
8162 return FALSE;
8163 }
8164
8165 /* Run through all the TLS relocs looking for optimization
8166 opportunities. The linker has been hacked (see ppc64elf.em) to do
8167 a preliminary section layout so that we know the TLS segment
8168 offsets. We can't optimize earlier because some optimizations need
8169 to know the tp offset, and we need to optimize before allocating
8170 dynamic relocations. */
8171
8172 bfd_boolean
8173 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8174 {
8175 bfd *ibfd;
8176 asection *sec;
8177 struct ppc_link_hash_table *htab;
8178 unsigned char *toc_ref;
8179 int pass;
8180
8181 if (info->relocatable || !info->executable)
8182 return TRUE;
8183
8184 htab = ppc_hash_table (info);
8185 if (htab == NULL)
8186 return FALSE;
8187
8188 /* Make two passes over the relocs. On the first pass, mark toc
8189 entries involved with tls relocs, and check that tls relocs
8190 involved in setting up a tls_get_addr call are indeed followed by
8191 such a call. If they are not, we can't do any tls optimization.
8192 On the second pass twiddle tls_mask flags to notify
8193 relocate_section that optimization can be done, and adjust got
8194 and plt refcounts. */
8195 toc_ref = NULL;
8196 for (pass = 0; pass < 2; ++pass)
8197 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8198 {
8199 Elf_Internal_Sym *locsyms = NULL;
8200 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8201
8202 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8203 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8204 {
8205 Elf_Internal_Rela *relstart, *rel, *relend;
8206 bfd_boolean found_tls_get_addr_arg = 0;
8207
8208 /* Read the relocations. */
8209 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8210 info->keep_memory);
8211 if (relstart == NULL)
8212 {
8213 free (toc_ref);
8214 return FALSE;
8215 }
8216
8217 relend = relstart + sec->reloc_count;
8218 for (rel = relstart; rel < relend; rel++)
8219 {
8220 enum elf_ppc64_reloc_type r_type;
8221 unsigned long r_symndx;
8222 struct elf_link_hash_entry *h;
8223 Elf_Internal_Sym *sym;
8224 asection *sym_sec;
8225 unsigned char *tls_mask;
8226 unsigned char tls_set, tls_clear, tls_type = 0;
8227 bfd_vma value;
8228 bfd_boolean ok_tprel, is_local;
8229 long toc_ref_index = 0;
8230 int expecting_tls_get_addr = 0;
8231 bfd_boolean ret = FALSE;
8232
8233 r_symndx = ELF64_R_SYM (rel->r_info);
8234 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8235 r_symndx, ibfd))
8236 {
8237 err_free_rel:
8238 if (elf_section_data (sec)->relocs != relstart)
8239 free (relstart);
8240 if (toc_ref != NULL)
8241 free (toc_ref);
8242 if (locsyms != NULL
8243 && (elf_symtab_hdr (ibfd).contents
8244 != (unsigned char *) locsyms))
8245 free (locsyms);
8246 return ret;
8247 }
8248
8249 if (h != NULL)
8250 {
8251 if (h->root.type == bfd_link_hash_defined
8252 || h->root.type == bfd_link_hash_defweak)
8253 value = h->root.u.def.value;
8254 else if (h->root.type == bfd_link_hash_undefweak)
8255 value = 0;
8256 else
8257 {
8258 found_tls_get_addr_arg = 0;
8259 continue;
8260 }
8261 }
8262 else
8263 /* Symbols referenced by TLS relocs must be of type
8264 STT_TLS. So no need for .opd local sym adjust. */
8265 value = sym->st_value;
8266
8267 ok_tprel = FALSE;
8268 is_local = FALSE;
8269 if (h == NULL
8270 || !h->def_dynamic)
8271 {
8272 is_local = TRUE;
8273 if (h != NULL
8274 && h->root.type == bfd_link_hash_undefweak)
8275 ok_tprel = TRUE;
8276 else
8277 {
8278 value += sym_sec->output_offset;
8279 value += sym_sec->output_section->vma;
8280 value -= htab->elf.tls_sec->vma;
8281 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8282 < (bfd_vma) 1 << 32);
8283 }
8284 }
8285
8286 r_type = ELF64_R_TYPE (rel->r_info);
8287 /* If this section has old-style __tls_get_addr calls
8288 without marker relocs, then check that each
8289 __tls_get_addr call reloc is preceded by a reloc
8290 that conceivably belongs to the __tls_get_addr arg
8291 setup insn. If we don't find matching arg setup
8292 relocs, don't do any tls optimization. */
8293 if (pass == 0
8294 && sec->has_tls_get_addr_call
8295 && h != NULL
8296 && (h == &htab->tls_get_addr->elf
8297 || h == &htab->tls_get_addr_fd->elf)
8298 && !found_tls_get_addr_arg
8299 && is_branch_reloc (r_type))
8300 {
8301 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8302 "TLS optimization disabled\n"),
8303 ibfd, sec, rel->r_offset);
8304 ret = TRUE;
8305 goto err_free_rel;
8306 }
8307
8308 found_tls_get_addr_arg = 0;
8309 switch (r_type)
8310 {
8311 case R_PPC64_GOT_TLSLD16:
8312 case R_PPC64_GOT_TLSLD16_LO:
8313 expecting_tls_get_addr = 1;
8314 found_tls_get_addr_arg = 1;
8315 /* Fall thru */
8316
8317 case R_PPC64_GOT_TLSLD16_HI:
8318 case R_PPC64_GOT_TLSLD16_HA:
8319 /* These relocs should never be against a symbol
8320 defined in a shared lib. Leave them alone if
8321 that turns out to be the case. */
8322 if (!is_local)
8323 continue;
8324
8325 /* LD -> LE */
8326 tls_set = 0;
8327 tls_clear = TLS_LD;
8328 tls_type = TLS_TLS | TLS_LD;
8329 break;
8330
8331 case R_PPC64_GOT_TLSGD16:
8332 case R_PPC64_GOT_TLSGD16_LO:
8333 expecting_tls_get_addr = 1;
8334 found_tls_get_addr_arg = 1;
8335 /* Fall thru */
8336
8337 case R_PPC64_GOT_TLSGD16_HI:
8338 case R_PPC64_GOT_TLSGD16_HA:
8339 if (ok_tprel)
8340 /* GD -> LE */
8341 tls_set = 0;
8342 else
8343 /* GD -> IE */
8344 tls_set = TLS_TLS | TLS_TPRELGD;
8345 tls_clear = TLS_GD;
8346 tls_type = TLS_TLS | TLS_GD;
8347 break;
8348
8349 case R_PPC64_GOT_TPREL16_DS:
8350 case R_PPC64_GOT_TPREL16_LO_DS:
8351 case R_PPC64_GOT_TPREL16_HI:
8352 case R_PPC64_GOT_TPREL16_HA:
8353 if (ok_tprel)
8354 {
8355 /* IE -> LE */
8356 tls_set = 0;
8357 tls_clear = TLS_TPREL;
8358 tls_type = TLS_TLS | TLS_TPREL;
8359 break;
8360 }
8361 continue;
8362
8363 case R_PPC64_TLSGD:
8364 case R_PPC64_TLSLD:
8365 found_tls_get_addr_arg = 1;
8366 /* Fall thru */
8367
8368 case R_PPC64_TLS:
8369 case R_PPC64_TOC16:
8370 case R_PPC64_TOC16_LO:
8371 if (sym_sec == NULL || sym_sec != toc)
8372 continue;
8373
8374 /* Mark this toc entry as referenced by a TLS
8375 code sequence. We can do that now in the
8376 case of R_PPC64_TLS, and after checking for
8377 tls_get_addr for the TOC16 relocs. */
8378 if (toc_ref == NULL)
8379 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8380 if (toc_ref == NULL)
8381 goto err_free_rel;
8382
8383 if (h != NULL)
8384 value = h->root.u.def.value;
8385 else
8386 value = sym->st_value;
8387 value += rel->r_addend;
8388 if (value % 8 != 0)
8389 continue;
8390 BFD_ASSERT (value < toc->size
8391 && toc->output_offset % 8 == 0);
8392 toc_ref_index = (value + toc->output_offset) / 8;
8393 if (r_type == R_PPC64_TLS
8394 || r_type == R_PPC64_TLSGD
8395 || r_type == R_PPC64_TLSLD)
8396 {
8397 toc_ref[toc_ref_index] = 1;
8398 continue;
8399 }
8400
8401 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8402 continue;
8403
8404 tls_set = 0;
8405 tls_clear = 0;
8406 expecting_tls_get_addr = 2;
8407 break;
8408
8409 case R_PPC64_TPREL64:
8410 if (pass == 0
8411 || sec != toc
8412 || toc_ref == NULL
8413 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8414 continue;
8415 if (ok_tprel)
8416 {
8417 /* IE -> LE */
8418 tls_set = TLS_EXPLICIT;
8419 tls_clear = TLS_TPREL;
8420 break;
8421 }
8422 continue;
8423
8424 case R_PPC64_DTPMOD64:
8425 if (pass == 0
8426 || sec != toc
8427 || toc_ref == NULL
8428 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8429 continue;
8430 if (rel + 1 < relend
8431 && (rel[1].r_info
8432 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8433 && rel[1].r_offset == rel->r_offset + 8)
8434 {
8435 if (ok_tprel)
8436 /* GD -> LE */
8437 tls_set = TLS_EXPLICIT | TLS_GD;
8438 else
8439 /* GD -> IE */
8440 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8441 tls_clear = TLS_GD;
8442 }
8443 else
8444 {
8445 if (!is_local)
8446 continue;
8447
8448 /* LD -> LE */
8449 tls_set = TLS_EXPLICIT;
8450 tls_clear = TLS_LD;
8451 }
8452 break;
8453
8454 default:
8455 continue;
8456 }
8457
8458 if (pass == 0)
8459 {
8460 if (!expecting_tls_get_addr
8461 || !sec->has_tls_get_addr_call)
8462 continue;
8463
8464 if (rel + 1 < relend
8465 && branch_reloc_hash_match (ibfd, rel + 1,
8466 htab->tls_get_addr,
8467 htab->tls_get_addr_fd))
8468 {
8469 if (expecting_tls_get_addr == 2)
8470 {
8471 /* Check for toc tls entries. */
8472 unsigned char *toc_tls;
8473 int retval;
8474
8475 retval = get_tls_mask (&toc_tls, NULL, NULL,
8476 &locsyms,
8477 rel, ibfd);
8478 if (retval == 0)
8479 goto err_free_rel;
8480 if (toc_tls != NULL)
8481 {
8482 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8483 found_tls_get_addr_arg = 1;
8484 if (retval > 1)
8485 toc_ref[toc_ref_index] = 1;
8486 }
8487 }
8488 continue;
8489 }
8490
8491 if (expecting_tls_get_addr != 1)
8492 continue;
8493
8494 /* Uh oh, we didn't find the expected call. We
8495 could just mark this symbol to exclude it
8496 from tls optimization but it's safer to skip
8497 the entire optimization. */
8498 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8499 "TLS optimization disabled\n"),
8500 ibfd, sec, rel->r_offset);
8501 ret = TRUE;
8502 goto err_free_rel;
8503 }
8504
8505 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8506 {
8507 struct plt_entry *ent;
8508 for (ent = htab->tls_get_addr->elf.plt.plist;
8509 ent != NULL;
8510 ent = ent->next)
8511 if (ent->addend == 0)
8512 {
8513 if (ent->plt.refcount > 0)
8514 {
8515 ent->plt.refcount -= 1;
8516 expecting_tls_get_addr = 0;
8517 }
8518 break;
8519 }
8520 }
8521
8522 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8523 {
8524 struct plt_entry *ent;
8525 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8526 ent != NULL;
8527 ent = ent->next)
8528 if (ent->addend == 0)
8529 {
8530 if (ent->plt.refcount > 0)
8531 ent->plt.refcount -= 1;
8532 break;
8533 }
8534 }
8535
8536 if (tls_clear == 0)
8537 continue;
8538
8539 if ((tls_set & TLS_EXPLICIT) == 0)
8540 {
8541 struct got_entry *ent;
8542
8543 /* Adjust got entry for this reloc. */
8544 if (h != NULL)
8545 ent = h->got.glist;
8546 else
8547 ent = elf_local_got_ents (ibfd)[r_symndx];
8548
8549 for (; ent != NULL; ent = ent->next)
8550 if (ent->addend == rel->r_addend
8551 && ent->owner == ibfd
8552 && ent->tls_type == tls_type)
8553 break;
8554 if (ent == NULL)
8555 abort ();
8556
8557 if (tls_set == 0)
8558 {
8559 /* We managed to get rid of a got entry. */
8560 if (ent->got.refcount > 0)
8561 ent->got.refcount -= 1;
8562 }
8563 }
8564 else
8565 {
8566 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8567 we'll lose one or two dyn relocs. */
8568 if (!dec_dynrel_count (rel->r_info, sec, info,
8569 NULL, h, sym))
8570 return FALSE;
8571
8572 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8573 {
8574 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8575 NULL, h, sym))
8576 return FALSE;
8577 }
8578 }
8579
8580 *tls_mask |= tls_set;
8581 *tls_mask &= ~tls_clear;
8582 }
8583
8584 if (elf_section_data (sec)->relocs != relstart)
8585 free (relstart);
8586 }
8587
8588 if (locsyms != NULL
8589 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8590 {
8591 if (!info->keep_memory)
8592 free (locsyms);
8593 else
8594 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8595 }
8596 }
8597
8598 if (toc_ref != NULL)
8599 free (toc_ref);
8600 return TRUE;
8601 }
8602
8603 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8604 the values of any global symbols in a toc section that has been
8605 edited. Globals in toc sections should be a rarity, so this function
8606 sets a flag if any are found in toc sections other than the one just
8607 edited, so that futher hash table traversals can be avoided. */
8608
8609 struct adjust_toc_info
8610 {
8611 asection *toc;
8612 unsigned long *skip;
8613 bfd_boolean global_toc_syms;
8614 };
8615
8616 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8617
8618 static bfd_boolean
8619 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8620 {
8621 struct ppc_link_hash_entry *eh;
8622 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8623 unsigned long i;
8624
8625 if (h->root.type != bfd_link_hash_defined
8626 && h->root.type != bfd_link_hash_defweak)
8627 return TRUE;
8628
8629 eh = (struct ppc_link_hash_entry *) h;
8630 if (eh->adjust_done)
8631 return TRUE;
8632
8633 if (eh->elf.root.u.def.section == toc_inf->toc)
8634 {
8635 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8636 i = toc_inf->toc->rawsize >> 3;
8637 else
8638 i = eh->elf.root.u.def.value >> 3;
8639
8640 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8641 {
8642 (*_bfd_error_handler)
8643 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8644 do
8645 ++i;
8646 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8647 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8648 }
8649
8650 eh->elf.root.u.def.value -= toc_inf->skip[i];
8651 eh->adjust_done = 1;
8652 }
8653 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8654 toc_inf->global_toc_syms = TRUE;
8655
8656 return TRUE;
8657 }
8658
8659 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8660
8661 static bfd_boolean
8662 ok_lo_toc_insn (unsigned int insn)
8663 {
8664 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8665 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8666 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8667 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8668 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8669 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8670 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8671 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8672 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8673 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8674 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8675 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8676 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8677 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8678 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8679 && (insn & 3) != 1)
8680 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8681 && ((insn & 3) == 0 || (insn & 3) == 3))
8682 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8683 }
8684
8685 /* Examine all relocs referencing .toc sections in order to remove
8686 unused .toc entries. */
8687
8688 bfd_boolean
8689 ppc64_elf_edit_toc (struct bfd_link_info *info)
8690 {
8691 bfd *ibfd;
8692 struct adjust_toc_info toc_inf;
8693 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8694
8695 htab->do_toc_opt = 1;
8696 toc_inf.global_toc_syms = TRUE;
8697 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8698 {
8699 asection *toc, *sec;
8700 Elf_Internal_Shdr *symtab_hdr;
8701 Elf_Internal_Sym *local_syms;
8702 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8703 unsigned long *skip, *drop;
8704 unsigned char *used;
8705 unsigned char *keep, last, some_unused;
8706
8707 if (!is_ppc64_elf (ibfd))
8708 continue;
8709
8710 toc = bfd_get_section_by_name (ibfd, ".toc");
8711 if (toc == NULL
8712 || toc->size == 0
8713 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8714 || discarded_section (toc))
8715 continue;
8716
8717 toc_relocs = NULL;
8718 local_syms = NULL;
8719 symtab_hdr = &elf_symtab_hdr (ibfd);
8720
8721 /* Look at sections dropped from the final link. */
8722 skip = NULL;
8723 relstart = NULL;
8724 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8725 {
8726 if (sec->reloc_count == 0
8727 || !discarded_section (sec)
8728 || get_opd_info (sec)
8729 || (sec->flags & SEC_ALLOC) == 0
8730 || (sec->flags & SEC_DEBUGGING) != 0)
8731 continue;
8732
8733 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8734 if (relstart == NULL)
8735 goto error_ret;
8736
8737 /* Run through the relocs to see which toc entries might be
8738 unused. */
8739 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8740 {
8741 enum elf_ppc64_reloc_type r_type;
8742 unsigned long r_symndx;
8743 asection *sym_sec;
8744 struct elf_link_hash_entry *h;
8745 Elf_Internal_Sym *sym;
8746 bfd_vma val;
8747
8748 r_type = ELF64_R_TYPE (rel->r_info);
8749 switch (r_type)
8750 {
8751 default:
8752 continue;
8753
8754 case R_PPC64_TOC16:
8755 case R_PPC64_TOC16_LO:
8756 case R_PPC64_TOC16_HI:
8757 case R_PPC64_TOC16_HA:
8758 case R_PPC64_TOC16_DS:
8759 case R_PPC64_TOC16_LO_DS:
8760 break;
8761 }
8762
8763 r_symndx = ELF64_R_SYM (rel->r_info);
8764 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8765 r_symndx, ibfd))
8766 goto error_ret;
8767
8768 if (sym_sec != toc)
8769 continue;
8770
8771 if (h != NULL)
8772 val = h->root.u.def.value;
8773 else
8774 val = sym->st_value;
8775 val += rel->r_addend;
8776
8777 if (val >= toc->size)
8778 continue;
8779
8780 /* Anything in the toc ought to be aligned to 8 bytes.
8781 If not, don't mark as unused. */
8782 if (val & 7)
8783 continue;
8784
8785 if (skip == NULL)
8786 {
8787 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8788 if (skip == NULL)
8789 goto error_ret;
8790 }
8791
8792 skip[val >> 3] = ref_from_discarded;
8793 }
8794
8795 if (elf_section_data (sec)->relocs != relstart)
8796 free (relstart);
8797 }
8798
8799 /* For largetoc loads of address constants, we can convert
8800 . addis rx,2,addr@got@ha
8801 . ld ry,addr@got@l(rx)
8802 to
8803 . addis rx,2,addr@toc@ha
8804 . addi ry,rx,addr@toc@l
8805 when addr is within 2G of the toc pointer. This then means
8806 that the word storing "addr" in the toc is no longer needed. */
8807
8808 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8809 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8810 && toc->reloc_count != 0)
8811 {
8812 /* Read toc relocs. */
8813 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8814 info->keep_memory);
8815 if (toc_relocs == NULL)
8816 goto error_ret;
8817
8818 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8819 {
8820 enum elf_ppc64_reloc_type r_type;
8821 unsigned long r_symndx;
8822 asection *sym_sec;
8823 struct elf_link_hash_entry *h;
8824 Elf_Internal_Sym *sym;
8825 bfd_vma val, addr;
8826
8827 r_type = ELF64_R_TYPE (rel->r_info);
8828 if (r_type != R_PPC64_ADDR64)
8829 continue;
8830
8831 r_symndx = ELF64_R_SYM (rel->r_info);
8832 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8833 r_symndx, ibfd))
8834 goto error_ret;
8835
8836 if (sym_sec == NULL
8837 || discarded_section (sym_sec))
8838 continue;
8839
8840 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8841 continue;
8842
8843 if (h != NULL)
8844 {
8845 if (h->type == STT_GNU_IFUNC)
8846 continue;
8847 val = h->root.u.def.value;
8848 }
8849 else
8850 {
8851 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8852 continue;
8853 val = sym->st_value;
8854 }
8855 val += rel->r_addend;
8856 val += sym_sec->output_section->vma + sym_sec->output_offset;
8857
8858 /* We don't yet know the exact toc pointer value, but we
8859 know it will be somewhere in the toc section. Don't
8860 optimize if the difference from any possible toc
8861 pointer is outside [ff..f80008000, 7fff7fff]. */
8862 addr = toc->output_section->vma + TOC_BASE_OFF;
8863 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8864 continue;
8865
8866 addr = toc->output_section->vma + toc->output_section->rawsize;
8867 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8868 continue;
8869
8870 if (skip == NULL)
8871 {
8872 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8873 if (skip == NULL)
8874 goto error_ret;
8875 }
8876
8877 skip[rel->r_offset >> 3]
8878 |= can_optimize | ((rel - toc_relocs) << 2);
8879 }
8880 }
8881
8882 if (skip == NULL)
8883 continue;
8884
8885 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8886 if (used == NULL)
8887 {
8888 error_ret:
8889 if (local_syms != NULL
8890 && symtab_hdr->contents != (unsigned char *) local_syms)
8891 free (local_syms);
8892 if (sec != NULL
8893 && relstart != NULL
8894 && elf_section_data (sec)->relocs != relstart)
8895 free (relstart);
8896 if (toc_relocs != NULL
8897 && elf_section_data (toc)->relocs != toc_relocs)
8898 free (toc_relocs);
8899 if (skip != NULL)
8900 free (skip);
8901 return FALSE;
8902 }
8903
8904 /* Now check all kept sections that might reference the toc.
8905 Check the toc itself last. */
8906 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8907 : ibfd->sections);
8908 sec != NULL;
8909 sec = (sec == toc ? NULL
8910 : sec->next == NULL ? toc
8911 : sec->next == toc && toc->next ? toc->next
8912 : sec->next))
8913 {
8914 int repeat;
8915
8916 if (sec->reloc_count == 0
8917 || discarded_section (sec)
8918 || get_opd_info (sec)
8919 || (sec->flags & SEC_ALLOC) == 0
8920 || (sec->flags & SEC_DEBUGGING) != 0)
8921 continue;
8922
8923 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8924 info->keep_memory);
8925 if (relstart == NULL)
8926 {
8927 free (used);
8928 goto error_ret;
8929 }
8930
8931 /* Mark toc entries referenced as used. */
8932 do
8933 {
8934 repeat = 0;
8935 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8936 {
8937 enum elf_ppc64_reloc_type r_type;
8938 unsigned long r_symndx;
8939 asection *sym_sec;
8940 struct elf_link_hash_entry *h;
8941 Elf_Internal_Sym *sym;
8942 bfd_vma val;
8943 enum {no_check, check_lo, check_ha} insn_check;
8944
8945 r_type = ELF64_R_TYPE (rel->r_info);
8946 switch (r_type)
8947 {
8948 default:
8949 insn_check = no_check;
8950 break;
8951
8952 case R_PPC64_GOT_TLSLD16_HA:
8953 case R_PPC64_GOT_TLSGD16_HA:
8954 case R_PPC64_GOT_TPREL16_HA:
8955 case R_PPC64_GOT_DTPREL16_HA:
8956 case R_PPC64_GOT16_HA:
8957 case R_PPC64_TOC16_HA:
8958 insn_check = check_ha;
8959 break;
8960
8961 case R_PPC64_GOT_TLSLD16_LO:
8962 case R_PPC64_GOT_TLSGD16_LO:
8963 case R_PPC64_GOT_TPREL16_LO_DS:
8964 case R_PPC64_GOT_DTPREL16_LO_DS:
8965 case R_PPC64_GOT16_LO:
8966 case R_PPC64_GOT16_LO_DS:
8967 case R_PPC64_TOC16_LO:
8968 case R_PPC64_TOC16_LO_DS:
8969 insn_check = check_lo;
8970 break;
8971 }
8972
8973 if (insn_check != no_check)
8974 {
8975 bfd_vma off = rel->r_offset & ~3;
8976 unsigned char buf[4];
8977 unsigned int insn;
8978
8979 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8980 {
8981 free (used);
8982 goto error_ret;
8983 }
8984 insn = bfd_get_32 (ibfd, buf);
8985 if (insn_check == check_lo
8986 ? !ok_lo_toc_insn (insn)
8987 : ((insn & ((0x3f << 26) | 0x1f << 16))
8988 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8989 {
8990 char str[12];
8991
8992 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8993 sprintf (str, "%#08x", insn);
8994 info->callbacks->einfo
8995 (_("%P: %H: toc optimization is not supported for"
8996 " %s instruction.\n"),
8997 ibfd, sec, rel->r_offset & ~3, str);
8998 }
8999 }
9000
9001 switch (r_type)
9002 {
9003 case R_PPC64_TOC16:
9004 case R_PPC64_TOC16_LO:
9005 case R_PPC64_TOC16_HI:
9006 case R_PPC64_TOC16_HA:
9007 case R_PPC64_TOC16_DS:
9008 case R_PPC64_TOC16_LO_DS:
9009 /* In case we're taking addresses of toc entries. */
9010 case R_PPC64_ADDR64:
9011 break;
9012
9013 default:
9014 continue;
9015 }
9016
9017 r_symndx = ELF64_R_SYM (rel->r_info);
9018 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9019 r_symndx, ibfd))
9020 {
9021 free (used);
9022 goto error_ret;
9023 }
9024
9025 if (sym_sec != toc)
9026 continue;
9027
9028 if (h != NULL)
9029 val = h->root.u.def.value;
9030 else
9031 val = sym->st_value;
9032 val += rel->r_addend;
9033
9034 if (val >= toc->size)
9035 continue;
9036
9037 if ((skip[val >> 3] & can_optimize) != 0)
9038 {
9039 bfd_vma off;
9040 unsigned char opc;
9041
9042 switch (r_type)
9043 {
9044 case R_PPC64_TOC16_HA:
9045 break;
9046
9047 case R_PPC64_TOC16_LO_DS:
9048 off = rel->r_offset;
9049 off += (bfd_big_endian (ibfd) ? -2 : 3);
9050 if (!bfd_get_section_contents (ibfd, sec, &opc,
9051 off, 1))
9052 {
9053 free (used);
9054 goto error_ret;
9055 }
9056 if ((opc & (0x3f << 2)) == (58u << 2))
9057 break;
9058 /* Fall thru */
9059
9060 default:
9061 /* Wrong sort of reloc, or not a ld. We may
9062 as well clear ref_from_discarded too. */
9063 skip[val >> 3] = 0;
9064 }
9065 }
9066
9067 if (sec != toc)
9068 used[val >> 3] = 1;
9069 /* For the toc section, we only mark as used if this
9070 entry itself isn't unused. */
9071 else if ((used[rel->r_offset >> 3]
9072 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9073 && !used[val >> 3])
9074 {
9075 /* Do all the relocs again, to catch reference
9076 chains. */
9077 repeat = 1;
9078 used[val >> 3] = 1;
9079 }
9080 }
9081 }
9082 while (repeat);
9083
9084 if (elf_section_data (sec)->relocs != relstart)
9085 free (relstart);
9086 }
9087
9088 /* Merge the used and skip arrays. Assume that TOC
9089 doublewords not appearing as either used or unused belong
9090 to to an entry more than one doubleword in size. */
9091 for (drop = skip, keep = used, last = 0, some_unused = 0;
9092 drop < skip + (toc->size + 7) / 8;
9093 ++drop, ++keep)
9094 {
9095 if (*keep)
9096 {
9097 *drop &= ~ref_from_discarded;
9098 if ((*drop & can_optimize) != 0)
9099 some_unused = 1;
9100 last = 0;
9101 }
9102 else if ((*drop & ref_from_discarded) != 0)
9103 {
9104 some_unused = 1;
9105 last = ref_from_discarded;
9106 }
9107 else
9108 *drop = last;
9109 }
9110
9111 free (used);
9112
9113 if (some_unused)
9114 {
9115 bfd_byte *contents, *src;
9116 unsigned long off;
9117 Elf_Internal_Sym *sym;
9118 bfd_boolean local_toc_syms = FALSE;
9119
9120 /* Shuffle the toc contents, and at the same time convert the
9121 skip array from booleans into offsets. */
9122 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9123 goto error_ret;
9124
9125 elf_section_data (toc)->this_hdr.contents = contents;
9126
9127 for (src = contents, off = 0, drop = skip;
9128 src < contents + toc->size;
9129 src += 8, ++drop)
9130 {
9131 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9132 off += 8;
9133 else if (off != 0)
9134 {
9135 *drop = off;
9136 memcpy (src - off, src, 8);
9137 }
9138 }
9139 *drop = off;
9140 toc->rawsize = toc->size;
9141 toc->size = src - contents - off;
9142
9143 /* Adjust addends for relocs against the toc section sym,
9144 and optimize any accesses we can. */
9145 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9146 {
9147 if (sec->reloc_count == 0
9148 || discarded_section (sec))
9149 continue;
9150
9151 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9152 info->keep_memory);
9153 if (relstart == NULL)
9154 goto error_ret;
9155
9156 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9157 {
9158 enum elf_ppc64_reloc_type r_type;
9159 unsigned long r_symndx;
9160 asection *sym_sec;
9161 struct elf_link_hash_entry *h;
9162 bfd_vma val;
9163
9164 r_type = ELF64_R_TYPE (rel->r_info);
9165 switch (r_type)
9166 {
9167 default:
9168 continue;
9169
9170 case R_PPC64_TOC16:
9171 case R_PPC64_TOC16_LO:
9172 case R_PPC64_TOC16_HI:
9173 case R_PPC64_TOC16_HA:
9174 case R_PPC64_TOC16_DS:
9175 case R_PPC64_TOC16_LO_DS:
9176 case R_PPC64_ADDR64:
9177 break;
9178 }
9179
9180 r_symndx = ELF64_R_SYM (rel->r_info);
9181 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9182 r_symndx, ibfd))
9183 goto error_ret;
9184
9185 if (sym_sec != toc)
9186 continue;
9187
9188 if (h != NULL)
9189 val = h->root.u.def.value;
9190 else
9191 {
9192 val = sym->st_value;
9193 if (val != 0)
9194 local_toc_syms = TRUE;
9195 }
9196
9197 val += rel->r_addend;
9198
9199 if (val > toc->rawsize)
9200 val = toc->rawsize;
9201 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9202 continue;
9203 else if ((skip[val >> 3] & can_optimize) != 0)
9204 {
9205 Elf_Internal_Rela *tocrel
9206 = toc_relocs + (skip[val >> 3] >> 2);
9207 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9208
9209 switch (r_type)
9210 {
9211 case R_PPC64_TOC16_HA:
9212 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9213 break;
9214
9215 case R_PPC64_TOC16_LO_DS:
9216 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9217 break;
9218
9219 default:
9220 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9221 ppc_howto_init ();
9222 info->callbacks->einfo
9223 (_("%P: %H: %s references "
9224 "optimized away TOC entry\n"),
9225 ibfd, sec, rel->r_offset,
9226 ppc64_elf_howto_table[r_type]->name);
9227 bfd_set_error (bfd_error_bad_value);
9228 goto error_ret;
9229 }
9230 rel->r_addend = tocrel->r_addend;
9231 elf_section_data (sec)->relocs = relstart;
9232 continue;
9233 }
9234
9235 if (h != NULL || sym->st_value != 0)
9236 continue;
9237
9238 rel->r_addend -= skip[val >> 3];
9239 elf_section_data (sec)->relocs = relstart;
9240 }
9241
9242 if (elf_section_data (sec)->relocs != relstart)
9243 free (relstart);
9244 }
9245
9246 /* We shouldn't have local or global symbols defined in the TOC,
9247 but handle them anyway. */
9248 if (local_syms != NULL)
9249 for (sym = local_syms;
9250 sym < local_syms + symtab_hdr->sh_info;
9251 ++sym)
9252 if (sym->st_value != 0
9253 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9254 {
9255 unsigned long i;
9256
9257 if (sym->st_value > toc->rawsize)
9258 i = toc->rawsize >> 3;
9259 else
9260 i = sym->st_value >> 3;
9261
9262 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9263 {
9264 if (local_toc_syms)
9265 (*_bfd_error_handler)
9266 (_("%s defined on removed toc entry"),
9267 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9268 do
9269 ++i;
9270 while ((skip[i] & (ref_from_discarded | can_optimize)));
9271 sym->st_value = (bfd_vma) i << 3;
9272 }
9273
9274 sym->st_value -= skip[i];
9275 symtab_hdr->contents = (unsigned char *) local_syms;
9276 }
9277
9278 /* Adjust any global syms defined in this toc input section. */
9279 if (toc_inf.global_toc_syms)
9280 {
9281 toc_inf.toc = toc;
9282 toc_inf.skip = skip;
9283 toc_inf.global_toc_syms = FALSE;
9284 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9285 &toc_inf);
9286 }
9287
9288 if (toc->reloc_count != 0)
9289 {
9290 Elf_Internal_Shdr *rel_hdr;
9291 Elf_Internal_Rela *wrel;
9292 bfd_size_type sz;
9293
9294 /* Remove unused toc relocs, and adjust those we keep. */
9295 if (toc_relocs == NULL)
9296 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9297 info->keep_memory);
9298 if (toc_relocs == NULL)
9299 goto error_ret;
9300
9301 wrel = toc_relocs;
9302 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9303 if ((skip[rel->r_offset >> 3]
9304 & (ref_from_discarded | can_optimize)) == 0)
9305 {
9306 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9307 wrel->r_info = rel->r_info;
9308 wrel->r_addend = rel->r_addend;
9309 ++wrel;
9310 }
9311 else if (!dec_dynrel_count (rel->r_info, toc, info,
9312 &local_syms, NULL, NULL))
9313 goto error_ret;
9314
9315 elf_section_data (toc)->relocs = toc_relocs;
9316 toc->reloc_count = wrel - toc_relocs;
9317 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9318 sz = rel_hdr->sh_entsize;
9319 rel_hdr->sh_size = toc->reloc_count * sz;
9320 }
9321 }
9322 else if (toc_relocs != NULL
9323 && elf_section_data (toc)->relocs != toc_relocs)
9324 free (toc_relocs);
9325
9326 if (local_syms != NULL
9327 && symtab_hdr->contents != (unsigned char *) local_syms)
9328 {
9329 if (!info->keep_memory)
9330 free (local_syms);
9331 else
9332 symtab_hdr->contents = (unsigned char *) local_syms;
9333 }
9334 free (skip);
9335 }
9336
9337 return TRUE;
9338 }
9339
9340 /* Return true iff input section I references the TOC using
9341 instructions limited to +/-32k offsets. */
9342
9343 bfd_boolean
9344 ppc64_elf_has_small_toc_reloc (asection *i)
9345 {
9346 return (is_ppc64_elf (i->owner)
9347 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9348 }
9349
9350 /* Allocate space for one GOT entry. */
9351
9352 static void
9353 allocate_got (struct elf_link_hash_entry *h,
9354 struct bfd_link_info *info,
9355 struct got_entry *gent)
9356 {
9357 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9358 bfd_boolean dyn;
9359 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9360 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9361 ? 16 : 8);
9362 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9363 ? 2 : 1) * sizeof (Elf64_External_Rela);
9364 asection *got = ppc64_elf_tdata (gent->owner)->got;
9365
9366 gent->got.offset = got->size;
9367 got->size += entsize;
9368
9369 dyn = htab->elf.dynamic_sections_created;
9370 if (h->type == STT_GNU_IFUNC)
9371 {
9372 htab->elf.irelplt->size += rentsize;
9373 htab->got_reli_size += rentsize;
9374 }
9375 else if ((info->shared
9376 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9377 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9378 || h->root.type != bfd_link_hash_undefweak))
9379 {
9380 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9381 relgot->size += rentsize;
9382 }
9383 }
9384
9385 /* This function merges got entries in the same toc group. */
9386
9387 static void
9388 merge_got_entries (struct got_entry **pent)
9389 {
9390 struct got_entry *ent, *ent2;
9391
9392 for (ent = *pent; ent != NULL; ent = ent->next)
9393 if (!ent->is_indirect)
9394 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9395 if (!ent2->is_indirect
9396 && ent2->addend == ent->addend
9397 && ent2->tls_type == ent->tls_type
9398 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9399 {
9400 ent2->is_indirect = TRUE;
9401 ent2->got.ent = ent;
9402 }
9403 }
9404
9405 /* Allocate space in .plt, .got and associated reloc sections for
9406 dynamic relocs. */
9407
9408 static bfd_boolean
9409 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9410 {
9411 struct bfd_link_info *info;
9412 struct ppc_link_hash_table *htab;
9413 asection *s;
9414 struct ppc_link_hash_entry *eh;
9415 struct elf_dyn_relocs *p;
9416 struct got_entry **pgent, *gent;
9417
9418 if (h->root.type == bfd_link_hash_indirect)
9419 return TRUE;
9420
9421 info = (struct bfd_link_info *) inf;
9422 htab = ppc_hash_table (info);
9423 if (htab == NULL)
9424 return FALSE;
9425
9426 if ((htab->elf.dynamic_sections_created
9427 && h->dynindx != -1
9428 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9429 || h->type == STT_GNU_IFUNC)
9430 {
9431 struct plt_entry *pent;
9432 bfd_boolean doneone = FALSE;
9433 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9434 if (pent->plt.refcount > 0)
9435 {
9436 if (!htab->elf.dynamic_sections_created
9437 || h->dynindx == -1)
9438 {
9439 s = htab->elf.iplt;
9440 pent->plt.offset = s->size;
9441 s->size += PLT_ENTRY_SIZE (htab);
9442 s = htab->elf.irelplt;
9443 }
9444 else
9445 {
9446 /* If this is the first .plt entry, make room for the special
9447 first entry. */
9448 s = htab->elf.splt;
9449 if (s->size == 0)
9450 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9451
9452 pent->plt.offset = s->size;
9453
9454 /* Make room for this entry. */
9455 s->size += PLT_ENTRY_SIZE (htab);
9456
9457 /* Make room for the .glink code. */
9458 s = htab->glink;
9459 if (s->size == 0)
9460 s->size += GLINK_CALL_STUB_SIZE;
9461 if (htab->opd_abi)
9462 {
9463 /* We need bigger stubs past index 32767. */
9464 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9465 s->size += 4;
9466 s->size += 2*4;
9467 }
9468 else
9469 s->size += 4;
9470
9471 /* We also need to make an entry in the .rela.plt section. */
9472 s = htab->elf.srelplt;
9473 }
9474 s->size += sizeof (Elf64_External_Rela);
9475 doneone = TRUE;
9476 }
9477 else
9478 pent->plt.offset = (bfd_vma) -1;
9479 if (!doneone)
9480 {
9481 h->plt.plist = NULL;
9482 h->needs_plt = 0;
9483 }
9484 }
9485 else
9486 {
9487 h->plt.plist = NULL;
9488 h->needs_plt = 0;
9489 }
9490
9491 eh = (struct ppc_link_hash_entry *) h;
9492 /* Run through the TLS GD got entries first if we're changing them
9493 to TPREL. */
9494 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9495 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9496 if (gent->got.refcount > 0
9497 && (gent->tls_type & TLS_GD) != 0)
9498 {
9499 /* This was a GD entry that has been converted to TPREL. If
9500 there happens to be a TPREL entry we can use that one. */
9501 struct got_entry *ent;
9502 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9503 if (ent->got.refcount > 0
9504 && (ent->tls_type & TLS_TPREL) != 0
9505 && ent->addend == gent->addend
9506 && ent->owner == gent->owner)
9507 {
9508 gent->got.refcount = 0;
9509 break;
9510 }
9511
9512 /* If not, then we'll be using our own TPREL entry. */
9513 if (gent->got.refcount != 0)
9514 gent->tls_type = TLS_TLS | TLS_TPREL;
9515 }
9516
9517 /* Remove any list entry that won't generate a word in the GOT before
9518 we call merge_got_entries. Otherwise we risk merging to empty
9519 entries. */
9520 pgent = &h->got.glist;
9521 while ((gent = *pgent) != NULL)
9522 if (gent->got.refcount > 0)
9523 {
9524 if ((gent->tls_type & TLS_LD) != 0
9525 && !h->def_dynamic)
9526 {
9527 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9528 *pgent = gent->next;
9529 }
9530 else
9531 pgent = &gent->next;
9532 }
9533 else
9534 *pgent = gent->next;
9535
9536 if (!htab->do_multi_toc)
9537 merge_got_entries (&h->got.glist);
9538
9539 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9540 if (!gent->is_indirect)
9541 {
9542 /* Make sure this symbol is output as a dynamic symbol.
9543 Undefined weak syms won't yet be marked as dynamic,
9544 nor will all TLS symbols. */
9545 if (h->dynindx == -1
9546 && !h->forced_local
9547 && h->type != STT_GNU_IFUNC
9548 && htab->elf.dynamic_sections_created)
9549 {
9550 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9551 return FALSE;
9552 }
9553
9554 if (!is_ppc64_elf (gent->owner))
9555 abort ();
9556
9557 allocate_got (h, info, gent);
9558 }
9559
9560 if (eh->dyn_relocs == NULL
9561 || (!htab->elf.dynamic_sections_created
9562 && h->type != STT_GNU_IFUNC))
9563 return TRUE;
9564
9565 /* In the shared -Bsymbolic case, discard space allocated for
9566 dynamic pc-relative relocs against symbols which turn out to be
9567 defined in regular objects. For the normal shared case, discard
9568 space for relocs that have become local due to symbol visibility
9569 changes. */
9570
9571 if (info->shared)
9572 {
9573 /* Relocs that use pc_count are those that appear on a call insn,
9574 or certain REL relocs (see must_be_dyn_reloc) that can be
9575 generated via assembly. We want calls to protected symbols to
9576 resolve directly to the function rather than going via the plt.
9577 If people want function pointer comparisons to work as expected
9578 then they should avoid writing weird assembly. */
9579 if (SYMBOL_CALLS_LOCAL (info, h))
9580 {
9581 struct elf_dyn_relocs **pp;
9582
9583 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9584 {
9585 p->count -= p->pc_count;
9586 p->pc_count = 0;
9587 if (p->count == 0)
9588 *pp = p->next;
9589 else
9590 pp = &p->next;
9591 }
9592 }
9593
9594 /* Also discard relocs on undefined weak syms with non-default
9595 visibility. */
9596 if (eh->dyn_relocs != NULL
9597 && h->root.type == bfd_link_hash_undefweak)
9598 {
9599 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9600 eh->dyn_relocs = NULL;
9601
9602 /* Make sure this symbol is output as a dynamic symbol.
9603 Undefined weak syms won't yet be marked as dynamic. */
9604 else if (h->dynindx == -1
9605 && !h->forced_local)
9606 {
9607 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9608 return FALSE;
9609 }
9610 }
9611 }
9612 else if (h->type == STT_GNU_IFUNC)
9613 {
9614 if (!h->non_got_ref)
9615 eh->dyn_relocs = NULL;
9616 }
9617 else if (ELIMINATE_COPY_RELOCS)
9618 {
9619 /* For the non-shared case, discard space for relocs against
9620 symbols which turn out to need copy relocs or are not
9621 dynamic. */
9622
9623 if (!h->non_got_ref
9624 && !h->def_regular)
9625 {
9626 /* Make sure this symbol is output as a dynamic symbol.
9627 Undefined weak syms won't yet be marked as dynamic. */
9628 if (h->dynindx == -1
9629 && !h->forced_local)
9630 {
9631 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9632 return FALSE;
9633 }
9634
9635 /* If that succeeded, we know we'll be keeping all the
9636 relocs. */
9637 if (h->dynindx != -1)
9638 goto keep;
9639 }
9640
9641 eh->dyn_relocs = NULL;
9642
9643 keep: ;
9644 }
9645
9646 /* Finally, allocate space. */
9647 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9648 {
9649 asection *sreloc = elf_section_data (p->sec)->sreloc;
9650 if (eh->elf.type == STT_GNU_IFUNC)
9651 sreloc = htab->elf.irelplt;
9652 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9653 }
9654
9655 return TRUE;
9656 }
9657
9658 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9659 to set up space for global entry stubs. These are put in glink,
9660 after the branch table. */
9661
9662 static bfd_boolean
9663 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9664 {
9665 struct bfd_link_info *info;
9666 struct ppc_link_hash_table *htab;
9667 struct plt_entry *pent;
9668 asection *s;
9669
9670 if (h->root.type == bfd_link_hash_indirect)
9671 return TRUE;
9672
9673 if (!h->pointer_equality_needed)
9674 return TRUE;
9675
9676 if (h->def_regular)
9677 return TRUE;
9678
9679 info = inf;
9680 htab = ppc_hash_table (info);
9681 if (htab == NULL)
9682 return FALSE;
9683
9684 s = htab->glink;
9685 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9686 if (pent->plt.offset != (bfd_vma) -1
9687 && pent->addend == 0)
9688 {
9689 /* For ELFv2, if this symbol is not defined in a regular file
9690 and we are not generating a shared library or pie, then we
9691 need to define the symbol in the executable on a call stub.
9692 This is to avoid text relocations. */
9693 s->size = (s->size + 15) & -16;
9694 h->root.u.def.section = s;
9695 h->root.u.def.value = s->size;
9696 s->size += 16;
9697 break;
9698 }
9699 return TRUE;
9700 }
9701
9702 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9703 read-only sections. */
9704
9705 static bfd_boolean
9706 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9707 {
9708 if (h->root.type == bfd_link_hash_indirect)
9709 return TRUE;
9710
9711 if (readonly_dynrelocs (h))
9712 {
9713 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9714
9715 /* Not an error, just cut short the traversal. */
9716 return FALSE;
9717 }
9718 return TRUE;
9719 }
9720
9721 /* Set the sizes of the dynamic sections. */
9722
9723 static bfd_boolean
9724 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9725 struct bfd_link_info *info)
9726 {
9727 struct ppc_link_hash_table *htab;
9728 bfd *dynobj;
9729 asection *s;
9730 bfd_boolean relocs;
9731 bfd *ibfd;
9732 struct got_entry *first_tlsld;
9733
9734 htab = ppc_hash_table (info);
9735 if (htab == NULL)
9736 return FALSE;
9737
9738 dynobj = htab->elf.dynobj;
9739 if (dynobj == NULL)
9740 abort ();
9741
9742 if (htab->elf.dynamic_sections_created)
9743 {
9744 /* Set the contents of the .interp section to the interpreter. */
9745 if (info->executable)
9746 {
9747 s = bfd_get_linker_section (dynobj, ".interp");
9748 if (s == NULL)
9749 abort ();
9750 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9751 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9752 }
9753 }
9754
9755 /* Set up .got offsets for local syms, and space for local dynamic
9756 relocs. */
9757 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9758 {
9759 struct got_entry **lgot_ents;
9760 struct got_entry **end_lgot_ents;
9761 struct plt_entry **local_plt;
9762 struct plt_entry **end_local_plt;
9763 unsigned char *lgot_masks;
9764 bfd_size_type locsymcount;
9765 Elf_Internal_Shdr *symtab_hdr;
9766
9767 if (!is_ppc64_elf (ibfd))
9768 continue;
9769
9770 for (s = ibfd->sections; s != NULL; s = s->next)
9771 {
9772 struct ppc_dyn_relocs *p;
9773
9774 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9775 {
9776 if (!bfd_is_abs_section (p->sec)
9777 && bfd_is_abs_section (p->sec->output_section))
9778 {
9779 /* Input section has been discarded, either because
9780 it is a copy of a linkonce section or due to
9781 linker script /DISCARD/, so we'll be discarding
9782 the relocs too. */
9783 }
9784 else if (p->count != 0)
9785 {
9786 asection *srel = elf_section_data (p->sec)->sreloc;
9787 if (p->ifunc)
9788 srel = htab->elf.irelplt;
9789 srel->size += p->count * sizeof (Elf64_External_Rela);
9790 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9791 info->flags |= DF_TEXTREL;
9792 }
9793 }
9794 }
9795
9796 lgot_ents = elf_local_got_ents (ibfd);
9797 if (!lgot_ents)
9798 continue;
9799
9800 symtab_hdr = &elf_symtab_hdr (ibfd);
9801 locsymcount = symtab_hdr->sh_info;
9802 end_lgot_ents = lgot_ents + locsymcount;
9803 local_plt = (struct plt_entry **) end_lgot_ents;
9804 end_local_plt = local_plt + locsymcount;
9805 lgot_masks = (unsigned char *) end_local_plt;
9806 s = ppc64_elf_tdata (ibfd)->got;
9807 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9808 {
9809 struct got_entry **pent, *ent;
9810
9811 pent = lgot_ents;
9812 while ((ent = *pent) != NULL)
9813 if (ent->got.refcount > 0)
9814 {
9815 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9816 {
9817 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9818 *pent = ent->next;
9819 }
9820 else
9821 {
9822 unsigned int ent_size = 8;
9823 unsigned int rel_size = sizeof (Elf64_External_Rela);
9824
9825 ent->got.offset = s->size;
9826 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9827 {
9828 ent_size *= 2;
9829 rel_size *= 2;
9830 }
9831 s->size += ent_size;
9832 if ((*lgot_masks & PLT_IFUNC) != 0)
9833 {
9834 htab->elf.irelplt->size += rel_size;
9835 htab->got_reli_size += rel_size;
9836 }
9837 else if (info->shared)
9838 {
9839 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9840 srel->size += rel_size;
9841 }
9842 pent = &ent->next;
9843 }
9844 }
9845 else
9846 *pent = ent->next;
9847 }
9848
9849 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9850 for (; local_plt < end_local_plt; ++local_plt)
9851 {
9852 struct plt_entry *ent;
9853
9854 for (ent = *local_plt; ent != NULL; ent = ent->next)
9855 if (ent->plt.refcount > 0)
9856 {
9857 s = htab->elf.iplt;
9858 ent->plt.offset = s->size;
9859 s->size += PLT_ENTRY_SIZE (htab);
9860
9861 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9862 }
9863 else
9864 ent->plt.offset = (bfd_vma) -1;
9865 }
9866 }
9867
9868 /* Allocate global sym .plt and .got entries, and space for global
9869 sym dynamic relocs. */
9870 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9871 /* Stash the end of glink branch table. */
9872 if (htab->glink != NULL)
9873 htab->glink->rawsize = htab->glink->size;
9874
9875 if (!htab->opd_abi && !info->shared)
9876 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9877
9878 first_tlsld = NULL;
9879 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9880 {
9881 struct got_entry *ent;
9882
9883 if (!is_ppc64_elf (ibfd))
9884 continue;
9885
9886 ent = ppc64_tlsld_got (ibfd);
9887 if (ent->got.refcount > 0)
9888 {
9889 if (!htab->do_multi_toc && first_tlsld != NULL)
9890 {
9891 ent->is_indirect = TRUE;
9892 ent->got.ent = first_tlsld;
9893 }
9894 else
9895 {
9896 if (first_tlsld == NULL)
9897 first_tlsld = ent;
9898 s = ppc64_elf_tdata (ibfd)->got;
9899 ent->got.offset = s->size;
9900 ent->owner = ibfd;
9901 s->size += 16;
9902 if (info->shared)
9903 {
9904 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9905 srel->size += sizeof (Elf64_External_Rela);
9906 }
9907 }
9908 }
9909 else
9910 ent->got.offset = (bfd_vma) -1;
9911 }
9912
9913 /* We now have determined the sizes of the various dynamic sections.
9914 Allocate memory for them. */
9915 relocs = FALSE;
9916 for (s = dynobj->sections; s != NULL; s = s->next)
9917 {
9918 if ((s->flags & SEC_LINKER_CREATED) == 0)
9919 continue;
9920
9921 if (s == htab->brlt || s == htab->relbrlt)
9922 /* These haven't been allocated yet; don't strip. */
9923 continue;
9924 else if (s == htab->elf.sgot
9925 || s == htab->elf.splt
9926 || s == htab->elf.iplt
9927 || s == htab->glink
9928 || s == htab->dynbss)
9929 {
9930 /* Strip this section if we don't need it; see the
9931 comment below. */
9932 }
9933 else if (s == htab->glink_eh_frame)
9934 {
9935 if (!bfd_is_abs_section (s->output_section))
9936 /* Not sized yet. */
9937 continue;
9938 }
9939 else if (CONST_STRNEQ (s->name, ".rela"))
9940 {
9941 if (s->size != 0)
9942 {
9943 if (s != htab->elf.srelplt)
9944 relocs = TRUE;
9945
9946 /* We use the reloc_count field as a counter if we need
9947 to copy relocs into the output file. */
9948 s->reloc_count = 0;
9949 }
9950 }
9951 else
9952 {
9953 /* It's not one of our sections, so don't allocate space. */
9954 continue;
9955 }
9956
9957 if (s->size == 0)
9958 {
9959 /* If we don't need this section, strip it from the
9960 output file. This is mostly to handle .rela.bss and
9961 .rela.plt. We must create both sections in
9962 create_dynamic_sections, because they must be created
9963 before the linker maps input sections to output
9964 sections. The linker does that before
9965 adjust_dynamic_symbol is called, and it is that
9966 function which decides whether anything needs to go
9967 into these sections. */
9968 s->flags |= SEC_EXCLUDE;
9969 continue;
9970 }
9971
9972 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9973 continue;
9974
9975 /* Allocate memory for the section contents. We use bfd_zalloc
9976 here in case unused entries are not reclaimed before the
9977 section's contents are written out. This should not happen,
9978 but this way if it does we get a R_PPC64_NONE reloc in .rela
9979 sections instead of garbage.
9980 We also rely on the section contents being zero when writing
9981 the GOT. */
9982 s->contents = bfd_zalloc (dynobj, s->size);
9983 if (s->contents == NULL)
9984 return FALSE;
9985 }
9986
9987 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9988 {
9989 if (!is_ppc64_elf (ibfd))
9990 continue;
9991
9992 s = ppc64_elf_tdata (ibfd)->got;
9993 if (s != NULL && s != htab->elf.sgot)
9994 {
9995 if (s->size == 0)
9996 s->flags |= SEC_EXCLUDE;
9997 else
9998 {
9999 s->contents = bfd_zalloc (ibfd, s->size);
10000 if (s->contents == NULL)
10001 return FALSE;
10002 }
10003 }
10004 s = ppc64_elf_tdata (ibfd)->relgot;
10005 if (s != NULL)
10006 {
10007 if (s->size == 0)
10008 s->flags |= SEC_EXCLUDE;
10009 else
10010 {
10011 s->contents = bfd_zalloc (ibfd, s->size);
10012 if (s->contents == NULL)
10013 return FALSE;
10014 relocs = TRUE;
10015 s->reloc_count = 0;
10016 }
10017 }
10018 }
10019
10020 if (htab->elf.dynamic_sections_created)
10021 {
10022 bfd_boolean tls_opt;
10023
10024 /* Add some entries to the .dynamic section. We fill in the
10025 values later, in ppc64_elf_finish_dynamic_sections, but we
10026 must add the entries now so that we get the correct size for
10027 the .dynamic section. The DT_DEBUG entry is filled in by the
10028 dynamic linker and used by the debugger. */
10029 #define add_dynamic_entry(TAG, VAL) \
10030 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10031
10032 if (info->executable)
10033 {
10034 if (!add_dynamic_entry (DT_DEBUG, 0))
10035 return FALSE;
10036 }
10037
10038 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10039 {
10040 if (!add_dynamic_entry (DT_PLTGOT, 0)
10041 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10042 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10043 || !add_dynamic_entry (DT_JMPREL, 0)
10044 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10045 return FALSE;
10046 }
10047
10048 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10049 {
10050 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10051 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10052 return FALSE;
10053 }
10054
10055 tls_opt = (!htab->params->no_tls_get_addr_opt
10056 && htab->tls_get_addr_fd != NULL
10057 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10058 if (tls_opt || !htab->opd_abi)
10059 {
10060 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10061 return FALSE;
10062 }
10063
10064 if (relocs)
10065 {
10066 if (!add_dynamic_entry (DT_RELA, 0)
10067 || !add_dynamic_entry (DT_RELASZ, 0)
10068 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10069 return FALSE;
10070
10071 /* If any dynamic relocs apply to a read-only section,
10072 then we need a DT_TEXTREL entry. */
10073 if ((info->flags & DF_TEXTREL) == 0)
10074 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10075
10076 if ((info->flags & DF_TEXTREL) != 0)
10077 {
10078 if (!add_dynamic_entry (DT_TEXTREL, 0))
10079 return FALSE;
10080 }
10081 }
10082 }
10083 #undef add_dynamic_entry
10084
10085 return TRUE;
10086 }
10087
10088 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10089
10090 static bfd_boolean
10091 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10092 {
10093 if (h->plt.plist != NULL
10094 && !h->def_regular
10095 && !h->pointer_equality_needed)
10096 return FALSE;
10097
10098 return _bfd_elf_hash_symbol (h);
10099 }
10100
10101 /* Determine the type of stub needed, if any, for a call. */
10102
10103 static inline enum ppc_stub_type
10104 ppc_type_of_stub (asection *input_sec,
10105 const Elf_Internal_Rela *rel,
10106 struct ppc_link_hash_entry **hash,
10107 struct plt_entry **plt_ent,
10108 bfd_vma destination,
10109 unsigned long local_off)
10110 {
10111 struct ppc_link_hash_entry *h = *hash;
10112 bfd_vma location;
10113 bfd_vma branch_offset;
10114 bfd_vma max_branch_offset;
10115 enum elf_ppc64_reloc_type r_type;
10116
10117 if (h != NULL)
10118 {
10119 struct plt_entry *ent;
10120 struct ppc_link_hash_entry *fdh = h;
10121 if (h->oh != NULL
10122 && h->oh->is_func_descriptor)
10123 {
10124 fdh = ppc_follow_link (h->oh);
10125 *hash = fdh;
10126 }
10127
10128 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10129 if (ent->addend == rel->r_addend
10130 && ent->plt.offset != (bfd_vma) -1)
10131 {
10132 *plt_ent = ent;
10133 return ppc_stub_plt_call;
10134 }
10135
10136 /* Here, we know we don't have a plt entry. If we don't have a
10137 either a defined function descriptor or a defined entry symbol
10138 in a regular object file, then it is pointless trying to make
10139 any other type of stub. */
10140 if (!is_static_defined (&fdh->elf)
10141 && !is_static_defined (&h->elf))
10142 return ppc_stub_none;
10143 }
10144 else if (elf_local_got_ents (input_sec->owner) != NULL)
10145 {
10146 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10147 struct plt_entry **local_plt = (struct plt_entry **)
10148 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10149 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10150
10151 if (local_plt[r_symndx] != NULL)
10152 {
10153 struct plt_entry *ent;
10154
10155 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10156 if (ent->addend == rel->r_addend
10157 && ent->plt.offset != (bfd_vma) -1)
10158 {
10159 *plt_ent = ent;
10160 return ppc_stub_plt_call;
10161 }
10162 }
10163 }
10164
10165 /* Determine where the call point is. */
10166 location = (input_sec->output_offset
10167 + input_sec->output_section->vma
10168 + rel->r_offset);
10169
10170 branch_offset = destination - location;
10171 r_type = ELF64_R_TYPE (rel->r_info);
10172
10173 /* Determine if a long branch stub is needed. */
10174 max_branch_offset = 1 << 25;
10175 if (r_type != R_PPC64_REL24)
10176 max_branch_offset = 1 << 15;
10177
10178 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10179 /* We need a stub. Figure out whether a long_branch or plt_branch
10180 is needed later. */
10181 return ppc_stub_long_branch;
10182
10183 return ppc_stub_none;
10184 }
10185
10186 /* With power7 weakly ordered memory model, it is possible for ld.so
10187 to update a plt entry in one thread and have another thread see a
10188 stale zero toc entry. To avoid this we need some sort of acquire
10189 barrier in the call stub. One solution is to make the load of the
10190 toc word seem to appear to depend on the load of the function entry
10191 word. Another solution is to test for r2 being zero, and branch to
10192 the appropriate glink entry if so.
10193
10194 . fake dep barrier compare
10195 . ld 12,xxx(2) ld 12,xxx(2)
10196 . mtctr 12 mtctr 12
10197 . xor 11,12,12 ld 2,xxx+8(2)
10198 . add 2,2,11 cmpldi 2,0
10199 . ld 2,xxx+8(2) bnectr+
10200 . bctr b <glink_entry>
10201
10202 The solution involving the compare turns out to be faster, so
10203 that's what we use unless the branch won't reach. */
10204
10205 #define ALWAYS_USE_FAKE_DEP 0
10206 #define ALWAYS_EMIT_R2SAVE 0
10207
10208 #define PPC_LO(v) ((v) & 0xffff)
10209 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10210 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10211
10212 static inline unsigned int
10213 plt_stub_size (struct ppc_link_hash_table *htab,
10214 struct ppc_stub_hash_entry *stub_entry,
10215 bfd_vma off)
10216 {
10217 unsigned size = 12;
10218
10219 if (ALWAYS_EMIT_R2SAVE
10220 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10221 size += 4;
10222 if (PPC_HA (off) != 0)
10223 size += 4;
10224 if (htab->opd_abi)
10225 {
10226 size += 4;
10227 if (htab->params->plt_static_chain)
10228 size += 4;
10229 if (htab->params->plt_thread_safe
10230 && htab->elf.dynamic_sections_created
10231 && stub_entry->h != NULL
10232 && stub_entry->h->elf.dynindx != -1)
10233 size += 8;
10234 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10235 size += 4;
10236 }
10237 if (stub_entry->h != NULL
10238 && (stub_entry->h == htab->tls_get_addr_fd
10239 || stub_entry->h == htab->tls_get_addr)
10240 && !htab->params->no_tls_get_addr_opt)
10241 size += 13 * 4;
10242 return size;
10243 }
10244
10245 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10246 then return the padding needed to do so. */
10247 static inline unsigned int
10248 plt_stub_pad (struct ppc_link_hash_table *htab,
10249 struct ppc_stub_hash_entry *stub_entry,
10250 bfd_vma plt_off)
10251 {
10252 int stub_align = 1 << htab->params->plt_stub_align;
10253 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10254 bfd_vma stub_off = stub_entry->stub_sec->size;
10255
10256 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10257 > ((stub_size - 1) & -stub_align))
10258 return stub_align - (stub_off & (stub_align - 1));
10259 return 0;
10260 }
10261
10262 /* Build a .plt call stub. */
10263
10264 static inline bfd_byte *
10265 build_plt_stub (struct ppc_link_hash_table *htab,
10266 struct ppc_stub_hash_entry *stub_entry,
10267 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10268 {
10269 bfd *obfd = htab->params->stub_bfd;
10270 bfd_boolean plt_load_toc = htab->opd_abi;
10271 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10272 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10273 && htab->elf.dynamic_sections_created
10274 && stub_entry->h != NULL
10275 && stub_entry->h->elf.dynindx != -1);
10276 bfd_boolean use_fake_dep = plt_thread_safe;
10277 bfd_vma cmp_branch_off = 0;
10278
10279 if (!ALWAYS_USE_FAKE_DEP
10280 && plt_load_toc
10281 && plt_thread_safe
10282 && !((stub_entry->h == htab->tls_get_addr_fd
10283 || stub_entry->h == htab->tls_get_addr)
10284 && !htab->params->no_tls_get_addr_opt))
10285 {
10286 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10287 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10288 / PLT_ENTRY_SIZE (htab));
10289 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10290 bfd_vma to, from;
10291
10292 if (pltindex > 32768)
10293 glinkoff += (pltindex - 32768) * 4;
10294 to = (glinkoff
10295 + htab->glink->output_offset
10296 + htab->glink->output_section->vma);
10297 from = (p - stub_entry->stub_sec->contents
10298 + 4 * (ALWAYS_EMIT_R2SAVE
10299 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10300 + 4 * (PPC_HA (offset) != 0)
10301 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10302 != PPC_HA (offset))
10303 + 4 * (plt_static_chain != 0)
10304 + 20
10305 + stub_entry->stub_sec->output_offset
10306 + stub_entry->stub_sec->output_section->vma);
10307 cmp_branch_off = to - from;
10308 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10309 }
10310
10311 if (PPC_HA (offset) != 0)
10312 {
10313 if (r != NULL)
10314 {
10315 if (ALWAYS_EMIT_R2SAVE
10316 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10317 r[0].r_offset += 4;
10318 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10319 r[1].r_offset = r[0].r_offset + 4;
10320 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10321 r[1].r_addend = r[0].r_addend;
10322 if (plt_load_toc)
10323 {
10324 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10325 {
10326 r[2].r_offset = r[1].r_offset + 4;
10327 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10328 r[2].r_addend = r[0].r_addend;
10329 }
10330 else
10331 {
10332 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10333 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10334 r[2].r_addend = r[0].r_addend + 8;
10335 if (plt_static_chain)
10336 {
10337 r[3].r_offset = r[2].r_offset + 4;
10338 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10339 r[3].r_addend = r[0].r_addend + 16;
10340 }
10341 }
10342 }
10343 }
10344 if (ALWAYS_EMIT_R2SAVE
10345 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10346 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10347 if (plt_load_toc)
10348 {
10349 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10350 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10351 }
10352 else
10353 {
10354 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10355 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10356 }
10357 if (plt_load_toc
10358 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10359 {
10360 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10361 offset = 0;
10362 }
10363 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10364 if (plt_load_toc)
10365 {
10366 if (use_fake_dep)
10367 {
10368 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10369 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10370 }
10371 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10372 if (plt_static_chain)
10373 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10374 }
10375 }
10376 else
10377 {
10378 if (r != NULL)
10379 {
10380 if (ALWAYS_EMIT_R2SAVE
10381 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10382 r[0].r_offset += 4;
10383 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10384 if (plt_load_toc)
10385 {
10386 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10387 {
10388 r[1].r_offset = r[0].r_offset + 4;
10389 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10390 r[1].r_addend = r[0].r_addend;
10391 }
10392 else
10393 {
10394 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10395 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10396 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10397 if (plt_static_chain)
10398 {
10399 r[2].r_offset = r[1].r_offset + 4;
10400 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10401 r[2].r_addend = r[0].r_addend + 8;
10402 }
10403 }
10404 }
10405 }
10406 if (ALWAYS_EMIT_R2SAVE
10407 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10408 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10409 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10410 if (plt_load_toc
10411 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10412 {
10413 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10414 offset = 0;
10415 }
10416 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10417 if (plt_load_toc)
10418 {
10419 if (use_fake_dep)
10420 {
10421 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10422 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10423 }
10424 if (plt_static_chain)
10425 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10426 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10427 }
10428 }
10429 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10430 {
10431 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10432 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10433 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10434 }
10435 else
10436 bfd_put_32 (obfd, BCTR, p), p += 4;
10437 return p;
10438 }
10439
10440 /* Build a special .plt call stub for __tls_get_addr. */
10441
10442 #define LD_R11_0R3 0xe9630000
10443 #define LD_R12_0R3 0xe9830000
10444 #define MR_R0_R3 0x7c601b78
10445 #define CMPDI_R11_0 0x2c2b0000
10446 #define ADD_R3_R12_R13 0x7c6c6a14
10447 #define BEQLR 0x4d820020
10448 #define MR_R3_R0 0x7c030378
10449 #define STD_R11_0R1 0xf9610000
10450 #define BCTRL 0x4e800421
10451 #define LD_R11_0R1 0xe9610000
10452 #define MTLR_R11 0x7d6803a6
10453
10454 static inline bfd_byte *
10455 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10456 struct ppc_stub_hash_entry *stub_entry,
10457 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10458 {
10459 bfd *obfd = htab->params->stub_bfd;
10460
10461 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10462 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10463 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10464 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10465 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10466 bfd_put_32 (obfd, BEQLR, p), p += 4;
10467 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10468 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10469 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10470
10471 if (r != NULL)
10472 r[0].r_offset += 9 * 4;
10473 p = build_plt_stub (htab, stub_entry, p, offset, r);
10474 bfd_put_32 (obfd, BCTRL, p - 4);
10475
10476 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10477 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10478 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10479 bfd_put_32 (obfd, BLR, p), p += 4;
10480
10481 return p;
10482 }
10483
10484 static Elf_Internal_Rela *
10485 get_relocs (asection *sec, int count)
10486 {
10487 Elf_Internal_Rela *relocs;
10488 struct bfd_elf_section_data *elfsec_data;
10489
10490 elfsec_data = elf_section_data (sec);
10491 relocs = elfsec_data->relocs;
10492 if (relocs == NULL)
10493 {
10494 bfd_size_type relsize;
10495 relsize = sec->reloc_count * sizeof (*relocs);
10496 relocs = bfd_alloc (sec->owner, relsize);
10497 if (relocs == NULL)
10498 return NULL;
10499 elfsec_data->relocs = relocs;
10500 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10501 sizeof (Elf_Internal_Shdr));
10502 if (elfsec_data->rela.hdr == NULL)
10503 return NULL;
10504 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10505 * sizeof (Elf64_External_Rela));
10506 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10507 sec->reloc_count = 0;
10508 }
10509 relocs += sec->reloc_count;
10510 sec->reloc_count += count;
10511 return relocs;
10512 }
10513
10514 static bfd_vma
10515 get_r2off (struct bfd_link_info *info,
10516 struct ppc_stub_hash_entry *stub_entry)
10517 {
10518 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10519 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10520
10521 if (r2off == 0)
10522 {
10523 /* Support linking -R objects. Get the toc pointer from the
10524 opd entry. */
10525 char buf[8];
10526 if (!htab->opd_abi)
10527 return r2off;
10528 asection *opd = stub_entry->h->elf.root.u.def.section;
10529 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10530
10531 if (strcmp (opd->name, ".opd") != 0
10532 || opd->reloc_count != 0)
10533 {
10534 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10535 stub_entry->h->elf.root.root.string);
10536 bfd_set_error (bfd_error_bad_value);
10537 return 0;
10538 }
10539 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10540 return 0;
10541 r2off = bfd_get_64 (opd->owner, buf);
10542 r2off -= elf_gp (info->output_bfd);
10543 }
10544 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10545 return r2off;
10546 }
10547
10548 static bfd_boolean
10549 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10550 {
10551 struct ppc_stub_hash_entry *stub_entry;
10552 struct ppc_branch_hash_entry *br_entry;
10553 struct bfd_link_info *info;
10554 struct ppc_link_hash_table *htab;
10555 bfd_byte *loc;
10556 bfd_byte *p;
10557 bfd_vma dest, off;
10558 int size;
10559 Elf_Internal_Rela *r;
10560 asection *plt;
10561
10562 /* Massage our args to the form they really have. */
10563 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10564 info = in_arg;
10565
10566 htab = ppc_hash_table (info);
10567 if (htab == NULL)
10568 return FALSE;
10569
10570 /* Make a note of the offset within the stubs for this entry. */
10571 stub_entry->stub_offset = stub_entry->stub_sec->size;
10572 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10573
10574 htab->stub_count[stub_entry->stub_type - 1] += 1;
10575 switch (stub_entry->stub_type)
10576 {
10577 case ppc_stub_long_branch:
10578 case ppc_stub_long_branch_r2off:
10579 /* Branches are relative. This is where we are going to. */
10580 dest = (stub_entry->target_value
10581 + stub_entry->target_section->output_offset
10582 + stub_entry->target_section->output_section->vma);
10583 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10584 off = dest;
10585
10586 /* And this is where we are coming from. */
10587 off -= (stub_entry->stub_offset
10588 + stub_entry->stub_sec->output_offset
10589 + stub_entry->stub_sec->output_section->vma);
10590
10591 size = 4;
10592 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10593 {
10594 bfd_vma r2off = get_r2off (info, stub_entry);
10595
10596 if (r2off == 0)
10597 {
10598 htab->stub_error = TRUE;
10599 return FALSE;
10600 }
10601 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10602 loc += 4;
10603 size = 12;
10604 if (PPC_HA (r2off) != 0)
10605 {
10606 size = 16;
10607 bfd_put_32 (htab->params->stub_bfd,
10608 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10609 loc += 4;
10610 }
10611 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10612 loc += 4;
10613 off -= size - 4;
10614 }
10615 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10616
10617 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10618 {
10619 info->callbacks->einfo
10620 (_("%P: long branch stub `%s' offset overflow\n"),
10621 stub_entry->root.string);
10622 htab->stub_error = TRUE;
10623 return FALSE;
10624 }
10625
10626 if (info->emitrelocations)
10627 {
10628 r = get_relocs (stub_entry->stub_sec, 1);
10629 if (r == NULL)
10630 return FALSE;
10631 r->r_offset = loc - stub_entry->stub_sec->contents;
10632 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10633 r->r_addend = dest;
10634 if (stub_entry->h != NULL)
10635 {
10636 struct elf_link_hash_entry **hashes;
10637 unsigned long symndx;
10638 struct ppc_link_hash_entry *h;
10639
10640 hashes = elf_sym_hashes (htab->params->stub_bfd);
10641 if (hashes == NULL)
10642 {
10643 bfd_size_type hsize;
10644
10645 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10646 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10647 if (hashes == NULL)
10648 return FALSE;
10649 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10650 htab->stub_globals = 1;
10651 }
10652 symndx = htab->stub_globals++;
10653 h = stub_entry->h;
10654 hashes[symndx] = &h->elf;
10655 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10656 if (h->oh != NULL && h->oh->is_func)
10657 h = ppc_follow_link (h->oh);
10658 if (h->elf.root.u.def.section != stub_entry->target_section)
10659 /* H is an opd symbol. The addend must be zero. */
10660 r->r_addend = 0;
10661 else
10662 {
10663 off = (h->elf.root.u.def.value
10664 + h->elf.root.u.def.section->output_offset
10665 + h->elf.root.u.def.section->output_section->vma);
10666 r->r_addend -= off;
10667 }
10668 }
10669 }
10670 break;
10671
10672 case ppc_stub_plt_branch:
10673 case ppc_stub_plt_branch_r2off:
10674 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10675 stub_entry->root.string + 9,
10676 FALSE, FALSE);
10677 if (br_entry == NULL)
10678 {
10679 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10680 stub_entry->root.string);
10681 htab->stub_error = TRUE;
10682 return FALSE;
10683 }
10684
10685 dest = (stub_entry->target_value
10686 + stub_entry->target_section->output_offset
10687 + stub_entry->target_section->output_section->vma);
10688 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10689 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10690
10691 bfd_put_64 (htab->brlt->owner, dest,
10692 htab->brlt->contents + br_entry->offset);
10693
10694 if (br_entry->iter == htab->stub_iteration)
10695 {
10696 br_entry->iter = 0;
10697
10698 if (htab->relbrlt != NULL)
10699 {
10700 /* Create a reloc for the branch lookup table entry. */
10701 Elf_Internal_Rela rela;
10702 bfd_byte *rl;
10703
10704 rela.r_offset = (br_entry->offset
10705 + htab->brlt->output_offset
10706 + htab->brlt->output_section->vma);
10707 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10708 rela.r_addend = dest;
10709
10710 rl = htab->relbrlt->contents;
10711 rl += (htab->relbrlt->reloc_count++
10712 * sizeof (Elf64_External_Rela));
10713 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10714 }
10715 else if (info->emitrelocations)
10716 {
10717 r = get_relocs (htab->brlt, 1);
10718 if (r == NULL)
10719 return FALSE;
10720 /* brlt, being SEC_LINKER_CREATED does not go through the
10721 normal reloc processing. Symbols and offsets are not
10722 translated from input file to output file form, so
10723 set up the offset per the output file. */
10724 r->r_offset = (br_entry->offset
10725 + htab->brlt->output_offset
10726 + htab->brlt->output_section->vma);
10727 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10728 r->r_addend = dest;
10729 }
10730 }
10731
10732 dest = (br_entry->offset
10733 + htab->brlt->output_offset
10734 + htab->brlt->output_section->vma);
10735
10736 off = (dest
10737 - elf_gp (htab->brlt->output_section->owner)
10738 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10739
10740 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10741 {
10742 info->callbacks->einfo
10743 (_("%P: linkage table error against `%T'\n"),
10744 stub_entry->root.string);
10745 bfd_set_error (bfd_error_bad_value);
10746 htab->stub_error = TRUE;
10747 return FALSE;
10748 }
10749
10750 if (info->emitrelocations)
10751 {
10752 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10753 if (r == NULL)
10754 return FALSE;
10755 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10756 if (bfd_big_endian (info->output_bfd))
10757 r[0].r_offset += 2;
10758 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10759 r[0].r_offset += 4;
10760 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10761 r[0].r_addend = dest;
10762 if (PPC_HA (off) != 0)
10763 {
10764 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10765 r[1].r_offset = r[0].r_offset + 4;
10766 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10767 r[1].r_addend = r[0].r_addend;
10768 }
10769 }
10770
10771 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10772 {
10773 if (PPC_HA (off) != 0)
10774 {
10775 size = 16;
10776 bfd_put_32 (htab->params->stub_bfd,
10777 ADDIS_R12_R2 | PPC_HA (off), loc);
10778 loc += 4;
10779 bfd_put_32 (htab->params->stub_bfd,
10780 LD_R12_0R12 | PPC_LO (off), loc);
10781 }
10782 else
10783 {
10784 size = 12;
10785 bfd_put_32 (htab->params->stub_bfd,
10786 LD_R12_0R2 | PPC_LO (off), loc);
10787 }
10788 }
10789 else
10790 {
10791 bfd_vma r2off = get_r2off (info, stub_entry);
10792
10793 if (r2off == 0 && htab->opd_abi)
10794 {
10795 htab->stub_error = TRUE;
10796 return FALSE;
10797 }
10798
10799 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10800 loc += 4;
10801 size = 16;
10802 if (PPC_HA (off) != 0)
10803 {
10804 size += 4;
10805 bfd_put_32 (htab->params->stub_bfd,
10806 ADDIS_R12_R2 | PPC_HA (off), loc);
10807 loc += 4;
10808 bfd_put_32 (htab->params->stub_bfd,
10809 LD_R12_0R12 | PPC_LO (off), loc);
10810 }
10811 else
10812 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10813
10814 if (PPC_HA (r2off) != 0)
10815 {
10816 size += 4;
10817 loc += 4;
10818 bfd_put_32 (htab->params->stub_bfd,
10819 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10820 }
10821 if (PPC_LO (r2off) != 0)
10822 {
10823 size += 4;
10824 loc += 4;
10825 bfd_put_32 (htab->params->stub_bfd,
10826 ADDI_R2_R2 | PPC_LO (r2off), loc);
10827 }
10828 }
10829 loc += 4;
10830 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10831 loc += 4;
10832 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10833 break;
10834
10835 case ppc_stub_plt_call:
10836 case ppc_stub_plt_call_r2save:
10837 if (stub_entry->h != NULL
10838 && stub_entry->h->is_func_descriptor
10839 && stub_entry->h->oh != NULL)
10840 {
10841 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10842
10843 /* If the old-ABI "dot-symbol" is undefined make it weak so
10844 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10845 FIXME: We used to define the symbol on one of the call
10846 stubs instead, which is why we test symbol section id
10847 against htab->top_id in various places. Likely all
10848 these checks could now disappear. */
10849 if (fh->elf.root.type == bfd_link_hash_undefined)
10850 fh->elf.root.type = bfd_link_hash_undefweak;
10851 /* Stop undo_symbol_twiddle changing it back to undefined. */
10852 fh->was_undefined = 0;
10853 }
10854
10855 /* Now build the stub. */
10856 dest = stub_entry->plt_ent->plt.offset & ~1;
10857 if (dest >= (bfd_vma) -2)
10858 abort ();
10859
10860 plt = htab->elf.splt;
10861 if (!htab->elf.dynamic_sections_created
10862 || stub_entry->h == NULL
10863 || stub_entry->h->elf.dynindx == -1)
10864 plt = htab->elf.iplt;
10865
10866 dest += plt->output_offset + plt->output_section->vma;
10867
10868 if (stub_entry->h == NULL
10869 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10870 {
10871 Elf_Internal_Rela rela;
10872 bfd_byte *rl;
10873
10874 rela.r_offset = dest;
10875 if (htab->opd_abi)
10876 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10877 else
10878 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10879 rela.r_addend = (stub_entry->target_value
10880 + stub_entry->target_section->output_offset
10881 + stub_entry->target_section->output_section->vma);
10882
10883 rl = (htab->elf.irelplt->contents
10884 + (htab->elf.irelplt->reloc_count++
10885 * sizeof (Elf64_External_Rela)));
10886 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10887 stub_entry->plt_ent->plt.offset |= 1;
10888 }
10889
10890 off = (dest
10891 - elf_gp (plt->output_section->owner)
10892 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10893
10894 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10895 {
10896 info->callbacks->einfo
10897 (_("%P: linkage table error against `%T'\n"),
10898 stub_entry->h != NULL
10899 ? stub_entry->h->elf.root.root.string
10900 : "<local sym>");
10901 bfd_set_error (bfd_error_bad_value);
10902 htab->stub_error = TRUE;
10903 return FALSE;
10904 }
10905
10906 if (htab->params->plt_stub_align != 0)
10907 {
10908 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10909
10910 stub_entry->stub_sec->size += pad;
10911 stub_entry->stub_offset = stub_entry->stub_sec->size;
10912 loc += pad;
10913 }
10914
10915 r = NULL;
10916 if (info->emitrelocations)
10917 {
10918 r = get_relocs (stub_entry->stub_sec,
10919 ((PPC_HA (off) != 0)
10920 + (htab->opd_abi
10921 ? 2 + (htab->params->plt_static_chain
10922 && PPC_HA (off + 16) == PPC_HA (off))
10923 : 1)));
10924 if (r == NULL)
10925 return FALSE;
10926 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10927 if (bfd_big_endian (info->output_bfd))
10928 r[0].r_offset += 2;
10929 r[0].r_addend = dest;
10930 }
10931 if (stub_entry->h != NULL
10932 && (stub_entry->h == htab->tls_get_addr_fd
10933 || stub_entry->h == htab->tls_get_addr)
10934 && !htab->params->no_tls_get_addr_opt)
10935 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10936 else
10937 p = build_plt_stub (htab, stub_entry, loc, off, r);
10938 size = p - loc;
10939 break;
10940
10941 default:
10942 BFD_FAIL ();
10943 return FALSE;
10944 }
10945
10946 stub_entry->stub_sec->size += size;
10947
10948 if (htab->params->emit_stub_syms)
10949 {
10950 struct elf_link_hash_entry *h;
10951 size_t len1, len2;
10952 char *name;
10953 const char *const stub_str[] = { "long_branch",
10954 "long_branch_r2off",
10955 "plt_branch",
10956 "plt_branch_r2off",
10957 "plt_call",
10958 "plt_call" };
10959
10960 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10961 len2 = strlen (stub_entry->root.string);
10962 name = bfd_malloc (len1 + len2 + 2);
10963 if (name == NULL)
10964 return FALSE;
10965 memcpy (name, stub_entry->root.string, 9);
10966 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10967 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10968 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10969 if (h == NULL)
10970 return FALSE;
10971 if (h->root.type == bfd_link_hash_new)
10972 {
10973 h->root.type = bfd_link_hash_defined;
10974 h->root.u.def.section = stub_entry->stub_sec;
10975 h->root.u.def.value = stub_entry->stub_offset;
10976 h->ref_regular = 1;
10977 h->def_regular = 1;
10978 h->ref_regular_nonweak = 1;
10979 h->forced_local = 1;
10980 h->non_elf = 0;
10981 h->root.linker_def = 1;
10982 }
10983 }
10984
10985 return TRUE;
10986 }
10987
10988 /* As above, but don't actually build the stub. Just bump offset so
10989 we know stub section sizes, and select plt_branch stubs where
10990 long_branch stubs won't do. */
10991
10992 static bfd_boolean
10993 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10994 {
10995 struct ppc_stub_hash_entry *stub_entry;
10996 struct bfd_link_info *info;
10997 struct ppc_link_hash_table *htab;
10998 bfd_vma off;
10999 int size;
11000
11001 /* Massage our args to the form they really have. */
11002 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11003 info = in_arg;
11004
11005 htab = ppc_hash_table (info);
11006 if (htab == NULL)
11007 return FALSE;
11008
11009 if (stub_entry->stub_type == ppc_stub_plt_call
11010 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11011 {
11012 asection *plt;
11013 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11014 if (off >= (bfd_vma) -2)
11015 abort ();
11016 plt = htab->elf.splt;
11017 if (!htab->elf.dynamic_sections_created
11018 || stub_entry->h == NULL
11019 || stub_entry->h->elf.dynindx == -1)
11020 plt = htab->elf.iplt;
11021 off += (plt->output_offset
11022 + plt->output_section->vma
11023 - elf_gp (plt->output_section->owner)
11024 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11025
11026 size = plt_stub_size (htab, stub_entry, off);
11027 if (htab->params->plt_stub_align)
11028 size += plt_stub_pad (htab, stub_entry, off);
11029 if (info->emitrelocations)
11030 {
11031 stub_entry->stub_sec->reloc_count
11032 += ((PPC_HA (off) != 0)
11033 + (htab->opd_abi
11034 ? 2 + (htab->params->plt_static_chain
11035 && PPC_HA (off + 16) == PPC_HA (off))
11036 : 1));
11037 stub_entry->stub_sec->flags |= SEC_RELOC;
11038 }
11039 }
11040 else
11041 {
11042 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11043 variants. */
11044 bfd_vma r2off = 0;
11045 bfd_vma local_off = 0;
11046
11047 off = (stub_entry->target_value
11048 + stub_entry->target_section->output_offset
11049 + stub_entry->target_section->output_section->vma);
11050 off -= (stub_entry->stub_sec->size
11051 + stub_entry->stub_sec->output_offset
11052 + stub_entry->stub_sec->output_section->vma);
11053
11054 /* Reset the stub type from the plt variant in case we now
11055 can reach with a shorter stub. */
11056 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11057 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11058
11059 size = 4;
11060 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11061 {
11062 r2off = get_r2off (info, stub_entry);
11063 if (r2off == 0 && htab->opd_abi)
11064 {
11065 htab->stub_error = TRUE;
11066 return FALSE;
11067 }
11068 size = 12;
11069 if (PPC_HA (r2off) != 0)
11070 size = 16;
11071 off -= size - 4;
11072 }
11073
11074 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11075
11076 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11077 Do the same for -R objects without function descriptors. */
11078 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11079 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11080 && r2off == 0))
11081 {
11082 struct ppc_branch_hash_entry *br_entry;
11083
11084 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11085 stub_entry->root.string + 9,
11086 TRUE, FALSE);
11087 if (br_entry == NULL)
11088 {
11089 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11090 stub_entry->root.string);
11091 htab->stub_error = TRUE;
11092 return FALSE;
11093 }
11094
11095 if (br_entry->iter != htab->stub_iteration)
11096 {
11097 br_entry->iter = htab->stub_iteration;
11098 br_entry->offset = htab->brlt->size;
11099 htab->brlt->size += 8;
11100
11101 if (htab->relbrlt != NULL)
11102 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11103 else if (info->emitrelocations)
11104 {
11105 htab->brlt->reloc_count += 1;
11106 htab->brlt->flags |= SEC_RELOC;
11107 }
11108 }
11109
11110 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11111 off = (br_entry->offset
11112 + htab->brlt->output_offset
11113 + htab->brlt->output_section->vma
11114 - elf_gp (htab->brlt->output_section->owner)
11115 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11116
11117 if (info->emitrelocations)
11118 {
11119 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
11120 stub_entry->stub_sec->flags |= SEC_RELOC;
11121 }
11122
11123 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11124 {
11125 size = 12;
11126 if (PPC_HA (off) != 0)
11127 size = 16;
11128 }
11129 else
11130 {
11131 size = 16;
11132 if (PPC_HA (off) != 0)
11133 size += 4;
11134
11135 if (PPC_HA (r2off) != 0)
11136 size += 4;
11137 if (PPC_LO (r2off) != 0)
11138 size += 4;
11139 }
11140 }
11141 else if (info->emitrelocations)
11142 {
11143 stub_entry->stub_sec->reloc_count += 1;
11144 stub_entry->stub_sec->flags |= SEC_RELOC;
11145 }
11146 }
11147
11148 stub_entry->stub_sec->size += size;
11149 return TRUE;
11150 }
11151
11152 /* Set up various things so that we can make a list of input sections
11153 for each output section included in the link. Returns -1 on error,
11154 0 when no stubs will be needed, and 1 on success. */
11155
11156 int
11157 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11158 {
11159 bfd *input_bfd;
11160 int top_id, top_index, id;
11161 asection *section;
11162 asection **input_list;
11163 bfd_size_type amt;
11164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11165
11166 if (htab == NULL)
11167 return -1;
11168
11169 /* Find the top input section id. */
11170 for (input_bfd = info->input_bfds, top_id = 3;
11171 input_bfd != NULL;
11172 input_bfd = input_bfd->link.next)
11173 {
11174 for (section = input_bfd->sections;
11175 section != NULL;
11176 section = section->next)
11177 {
11178 if (top_id < section->id)
11179 top_id = section->id;
11180 }
11181 }
11182
11183 htab->top_id = top_id;
11184 amt = sizeof (struct map_stub) * (top_id + 1);
11185 htab->stub_group = bfd_zmalloc (amt);
11186 if (htab->stub_group == NULL)
11187 return -1;
11188
11189 /* Set toc_off for com, und, abs and ind sections. */
11190 for (id = 0; id < 3; id++)
11191 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11192
11193 /* We can't use output_bfd->section_count here to find the top output
11194 section index as some sections may have been removed, and
11195 strip_excluded_output_sections doesn't renumber the indices. */
11196 for (section = info->output_bfd->sections, top_index = 0;
11197 section != NULL;
11198 section = section->next)
11199 {
11200 if (top_index < section->index)
11201 top_index = section->index;
11202 }
11203
11204 htab->top_index = top_index;
11205 amt = sizeof (asection *) * (top_index + 1);
11206 input_list = bfd_zmalloc (amt);
11207 htab->input_list = input_list;
11208 if (input_list == NULL)
11209 return -1;
11210
11211 return 1;
11212 }
11213
11214 /* Set up for first pass at multitoc partitioning. */
11215
11216 void
11217 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11218 {
11219 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11220
11221 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11222 htab->toc_bfd = NULL;
11223 htab->toc_first_sec = NULL;
11224 }
11225
11226 /* The linker repeatedly calls this function for each TOC input section
11227 and linker generated GOT section. Group input bfds such that the toc
11228 within a group is less than 64k in size. */
11229
11230 bfd_boolean
11231 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11232 {
11233 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11234 bfd_vma addr, off, limit;
11235
11236 if (htab == NULL)
11237 return FALSE;
11238
11239 if (!htab->second_toc_pass)
11240 {
11241 /* Keep track of the first .toc or .got section for this input bfd. */
11242 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11243
11244 if (new_bfd)
11245 {
11246 htab->toc_bfd = isec->owner;
11247 htab->toc_first_sec = isec;
11248 }
11249
11250 addr = isec->output_offset + isec->output_section->vma;
11251 off = addr - htab->toc_curr;
11252 limit = 0x80008000;
11253 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11254 limit = 0x10000;
11255 if (off + isec->size > limit)
11256 {
11257 addr = (htab->toc_first_sec->output_offset
11258 + htab->toc_first_sec->output_section->vma);
11259 htab->toc_curr = addr;
11260 }
11261
11262 /* toc_curr is the base address of this toc group. Set elf_gp
11263 for the input section to be the offset relative to the
11264 output toc base plus 0x8000. Making the input elf_gp an
11265 offset allows us to move the toc as a whole without
11266 recalculating input elf_gp. */
11267 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11268 off += TOC_BASE_OFF;
11269
11270 /* Die if someone uses a linker script that doesn't keep input
11271 file .toc and .got together. */
11272 if (new_bfd
11273 && elf_gp (isec->owner) != 0
11274 && elf_gp (isec->owner) != off)
11275 return FALSE;
11276
11277 elf_gp (isec->owner) = off;
11278 return TRUE;
11279 }
11280
11281 /* During the second pass toc_first_sec points to the start of
11282 a toc group, and toc_curr is used to track the old elf_gp.
11283 We use toc_bfd to ensure we only look at each bfd once. */
11284 if (htab->toc_bfd == isec->owner)
11285 return TRUE;
11286 htab->toc_bfd = isec->owner;
11287
11288 if (htab->toc_first_sec == NULL
11289 || htab->toc_curr != elf_gp (isec->owner))
11290 {
11291 htab->toc_curr = elf_gp (isec->owner);
11292 htab->toc_first_sec = isec;
11293 }
11294 addr = (htab->toc_first_sec->output_offset
11295 + htab->toc_first_sec->output_section->vma);
11296 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11297 elf_gp (isec->owner) = off;
11298
11299 return TRUE;
11300 }
11301
11302 /* Called via elf_link_hash_traverse to merge GOT entries for global
11303 symbol H. */
11304
11305 static bfd_boolean
11306 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11307 {
11308 if (h->root.type == bfd_link_hash_indirect)
11309 return TRUE;
11310
11311 merge_got_entries (&h->got.glist);
11312
11313 return TRUE;
11314 }
11315
11316 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11317 symbol H. */
11318
11319 static bfd_boolean
11320 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11321 {
11322 struct got_entry *gent;
11323
11324 if (h->root.type == bfd_link_hash_indirect)
11325 return TRUE;
11326
11327 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11328 if (!gent->is_indirect)
11329 allocate_got (h, (struct bfd_link_info *) inf, gent);
11330 return TRUE;
11331 }
11332
11333 /* Called on the first multitoc pass after the last call to
11334 ppc64_elf_next_toc_section. This function removes duplicate GOT
11335 entries. */
11336
11337 bfd_boolean
11338 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11339 {
11340 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11341 struct bfd *ibfd, *ibfd2;
11342 bfd_boolean done_something;
11343
11344 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11345
11346 if (!htab->do_multi_toc)
11347 return FALSE;
11348
11349 /* Merge global sym got entries within a toc group. */
11350 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11351
11352 /* And tlsld_got. */
11353 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11354 {
11355 struct got_entry *ent, *ent2;
11356
11357 if (!is_ppc64_elf (ibfd))
11358 continue;
11359
11360 ent = ppc64_tlsld_got (ibfd);
11361 if (!ent->is_indirect
11362 && ent->got.offset != (bfd_vma) -1)
11363 {
11364 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11365 {
11366 if (!is_ppc64_elf (ibfd2))
11367 continue;
11368
11369 ent2 = ppc64_tlsld_got (ibfd2);
11370 if (!ent2->is_indirect
11371 && ent2->got.offset != (bfd_vma) -1
11372 && elf_gp (ibfd2) == elf_gp (ibfd))
11373 {
11374 ent2->is_indirect = TRUE;
11375 ent2->got.ent = ent;
11376 }
11377 }
11378 }
11379 }
11380
11381 /* Zap sizes of got sections. */
11382 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11383 htab->elf.irelplt->size -= htab->got_reli_size;
11384 htab->got_reli_size = 0;
11385
11386 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11387 {
11388 asection *got, *relgot;
11389
11390 if (!is_ppc64_elf (ibfd))
11391 continue;
11392
11393 got = ppc64_elf_tdata (ibfd)->got;
11394 if (got != NULL)
11395 {
11396 got->rawsize = got->size;
11397 got->size = 0;
11398 relgot = ppc64_elf_tdata (ibfd)->relgot;
11399 relgot->rawsize = relgot->size;
11400 relgot->size = 0;
11401 }
11402 }
11403
11404 /* Now reallocate the got, local syms first. We don't need to
11405 allocate section contents again since we never increase size. */
11406 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11407 {
11408 struct got_entry **lgot_ents;
11409 struct got_entry **end_lgot_ents;
11410 struct plt_entry **local_plt;
11411 struct plt_entry **end_local_plt;
11412 unsigned char *lgot_masks;
11413 bfd_size_type locsymcount;
11414 Elf_Internal_Shdr *symtab_hdr;
11415 asection *s;
11416
11417 if (!is_ppc64_elf (ibfd))
11418 continue;
11419
11420 lgot_ents = elf_local_got_ents (ibfd);
11421 if (!lgot_ents)
11422 continue;
11423
11424 symtab_hdr = &elf_symtab_hdr (ibfd);
11425 locsymcount = symtab_hdr->sh_info;
11426 end_lgot_ents = lgot_ents + locsymcount;
11427 local_plt = (struct plt_entry **) end_lgot_ents;
11428 end_local_plt = local_plt + locsymcount;
11429 lgot_masks = (unsigned char *) end_local_plt;
11430 s = ppc64_elf_tdata (ibfd)->got;
11431 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11432 {
11433 struct got_entry *ent;
11434
11435 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11436 {
11437 unsigned int ent_size = 8;
11438 unsigned int rel_size = sizeof (Elf64_External_Rela);
11439
11440 ent->got.offset = s->size;
11441 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11442 {
11443 ent_size *= 2;
11444 rel_size *= 2;
11445 }
11446 s->size += ent_size;
11447 if ((*lgot_masks & PLT_IFUNC) != 0)
11448 {
11449 htab->elf.irelplt->size += rel_size;
11450 htab->got_reli_size += rel_size;
11451 }
11452 else if (info->shared)
11453 {
11454 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11455 srel->size += rel_size;
11456 }
11457 }
11458 }
11459 }
11460
11461 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11462
11463 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11464 {
11465 struct got_entry *ent;
11466
11467 if (!is_ppc64_elf (ibfd))
11468 continue;
11469
11470 ent = ppc64_tlsld_got (ibfd);
11471 if (!ent->is_indirect
11472 && ent->got.offset != (bfd_vma) -1)
11473 {
11474 asection *s = ppc64_elf_tdata (ibfd)->got;
11475 ent->got.offset = s->size;
11476 s->size += 16;
11477 if (info->shared)
11478 {
11479 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11480 srel->size += sizeof (Elf64_External_Rela);
11481 }
11482 }
11483 }
11484
11485 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11486 if (!done_something)
11487 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11488 {
11489 asection *got;
11490
11491 if (!is_ppc64_elf (ibfd))
11492 continue;
11493
11494 got = ppc64_elf_tdata (ibfd)->got;
11495 if (got != NULL)
11496 {
11497 done_something = got->rawsize != got->size;
11498 if (done_something)
11499 break;
11500 }
11501 }
11502
11503 if (done_something)
11504 (*htab->params->layout_sections_again) ();
11505
11506 /* Set up for second pass over toc sections to recalculate elf_gp
11507 on input sections. */
11508 htab->toc_bfd = NULL;
11509 htab->toc_first_sec = NULL;
11510 htab->second_toc_pass = TRUE;
11511 return done_something;
11512 }
11513
11514 /* Called after second pass of multitoc partitioning. */
11515
11516 void
11517 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11518 {
11519 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11520
11521 /* After the second pass, toc_curr tracks the TOC offset used
11522 for code sections below in ppc64_elf_next_input_section. */
11523 htab->toc_curr = TOC_BASE_OFF;
11524 }
11525
11526 /* No toc references were found in ISEC. If the code in ISEC makes no
11527 calls, then there's no need to use toc adjusting stubs when branching
11528 into ISEC. Actually, indirect calls from ISEC are OK as they will
11529 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11530 needed, and 2 if a cyclical call-graph was found but no other reason
11531 for a stub was detected. If called from the top level, a return of
11532 2 means the same as a return of 0. */
11533
11534 static int
11535 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11536 {
11537 int ret;
11538
11539 /* Mark this section as checked. */
11540 isec->call_check_done = 1;
11541
11542 /* We know none of our code bearing sections will need toc stubs. */
11543 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11544 return 0;
11545
11546 if (isec->size == 0)
11547 return 0;
11548
11549 if (isec->output_section == NULL)
11550 return 0;
11551
11552 ret = 0;
11553 if (isec->reloc_count != 0)
11554 {
11555 Elf_Internal_Rela *relstart, *rel;
11556 Elf_Internal_Sym *local_syms;
11557 struct ppc_link_hash_table *htab;
11558
11559 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11560 info->keep_memory);
11561 if (relstart == NULL)
11562 return -1;
11563
11564 /* Look for branches to outside of this section. */
11565 local_syms = NULL;
11566 htab = ppc_hash_table (info);
11567 if (htab == NULL)
11568 return -1;
11569
11570 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11571 {
11572 enum elf_ppc64_reloc_type r_type;
11573 unsigned long r_symndx;
11574 struct elf_link_hash_entry *h;
11575 struct ppc_link_hash_entry *eh;
11576 Elf_Internal_Sym *sym;
11577 asection *sym_sec;
11578 struct _opd_sec_data *opd;
11579 bfd_vma sym_value;
11580 bfd_vma dest;
11581
11582 r_type = ELF64_R_TYPE (rel->r_info);
11583 if (r_type != R_PPC64_REL24
11584 && r_type != R_PPC64_REL14
11585 && r_type != R_PPC64_REL14_BRTAKEN
11586 && r_type != R_PPC64_REL14_BRNTAKEN)
11587 continue;
11588
11589 r_symndx = ELF64_R_SYM (rel->r_info);
11590 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11591 isec->owner))
11592 {
11593 ret = -1;
11594 break;
11595 }
11596
11597 /* Calls to dynamic lib functions go through a plt call stub
11598 that uses r2. */
11599 eh = (struct ppc_link_hash_entry *) h;
11600 if (eh != NULL
11601 && (eh->elf.plt.plist != NULL
11602 || (eh->oh != NULL
11603 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11604 {
11605 ret = 1;
11606 break;
11607 }
11608
11609 if (sym_sec == NULL)
11610 /* Ignore other undefined symbols. */
11611 continue;
11612
11613 /* Assume branches to other sections not included in the
11614 link need stubs too, to cover -R and absolute syms. */
11615 if (sym_sec->output_section == NULL)
11616 {
11617 ret = 1;
11618 break;
11619 }
11620
11621 if (h == NULL)
11622 sym_value = sym->st_value;
11623 else
11624 {
11625 if (h->root.type != bfd_link_hash_defined
11626 && h->root.type != bfd_link_hash_defweak)
11627 abort ();
11628 sym_value = h->root.u.def.value;
11629 }
11630 sym_value += rel->r_addend;
11631
11632 /* If this branch reloc uses an opd sym, find the code section. */
11633 opd = get_opd_info (sym_sec);
11634 if (opd != NULL)
11635 {
11636 if (h == NULL && opd->adjust != NULL)
11637 {
11638 long adjust;
11639
11640 adjust = opd->adjust[OPD_NDX (sym->st_value)];
11641 if (adjust == -1)
11642 /* Assume deleted functions won't ever be called. */
11643 continue;
11644 sym_value += adjust;
11645 }
11646
11647 dest = opd_entry_value (sym_sec, sym_value,
11648 &sym_sec, NULL, FALSE);
11649 if (dest == (bfd_vma) -1)
11650 continue;
11651 }
11652 else
11653 dest = (sym_value
11654 + sym_sec->output_offset
11655 + sym_sec->output_section->vma);
11656
11657 /* Ignore branch to self. */
11658 if (sym_sec == isec)
11659 continue;
11660
11661 /* If the called function uses the toc, we need a stub. */
11662 if (sym_sec->has_toc_reloc
11663 || sym_sec->makes_toc_func_call)
11664 {
11665 ret = 1;
11666 break;
11667 }
11668
11669 /* Assume any branch that needs a long branch stub might in fact
11670 need a plt_branch stub. A plt_branch stub uses r2. */
11671 else if (dest - (isec->output_offset
11672 + isec->output_section->vma
11673 + rel->r_offset) + (1 << 25)
11674 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11675 ? h->other
11676 : sym->st_other))
11677 {
11678 ret = 1;
11679 break;
11680 }
11681
11682 /* If calling back to a section in the process of being
11683 tested, we can't say for sure that no toc adjusting stubs
11684 are needed, so don't return zero. */
11685 else if (sym_sec->call_check_in_progress)
11686 ret = 2;
11687
11688 /* Branches to another section that itself doesn't have any TOC
11689 references are OK. Recursively call ourselves to check. */
11690 else if (!sym_sec->call_check_done)
11691 {
11692 int recur;
11693
11694 /* Mark current section as indeterminate, so that other
11695 sections that call back to current won't be marked as
11696 known. */
11697 isec->call_check_in_progress = 1;
11698 recur = toc_adjusting_stub_needed (info, sym_sec);
11699 isec->call_check_in_progress = 0;
11700
11701 if (recur != 0)
11702 {
11703 ret = recur;
11704 if (recur != 2)
11705 break;
11706 }
11707 }
11708 }
11709
11710 if (local_syms != NULL
11711 && (elf_symtab_hdr (isec->owner).contents
11712 != (unsigned char *) local_syms))
11713 free (local_syms);
11714 if (elf_section_data (isec)->relocs != relstart)
11715 free (relstart);
11716 }
11717
11718 if ((ret & 1) == 0
11719 && isec->map_head.s != NULL
11720 && (strcmp (isec->output_section->name, ".init") == 0
11721 || strcmp (isec->output_section->name, ".fini") == 0))
11722 {
11723 if (isec->map_head.s->has_toc_reloc
11724 || isec->map_head.s->makes_toc_func_call)
11725 ret = 1;
11726 else if (!isec->map_head.s->call_check_done)
11727 {
11728 int recur;
11729 isec->call_check_in_progress = 1;
11730 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11731 isec->call_check_in_progress = 0;
11732 if (recur != 0)
11733 ret = recur;
11734 }
11735 }
11736
11737 if (ret == 1)
11738 isec->makes_toc_func_call = 1;
11739
11740 return ret;
11741 }
11742
11743 /* The linker repeatedly calls this function for each input section,
11744 in the order that input sections are linked into output sections.
11745 Build lists of input sections to determine groupings between which
11746 we may insert linker stubs. */
11747
11748 bfd_boolean
11749 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11750 {
11751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11752
11753 if (htab == NULL)
11754 return FALSE;
11755
11756 if ((isec->output_section->flags & SEC_CODE) != 0
11757 && isec->output_section->index <= htab->top_index)
11758 {
11759 asection **list = htab->input_list + isec->output_section->index;
11760 /* Steal the link_sec pointer for our list. */
11761 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11762 /* This happens to make the list in reverse order,
11763 which is what we want. */
11764 PREV_SEC (isec) = *list;
11765 *list = isec;
11766 }
11767
11768 if (htab->multi_toc_needed)
11769 {
11770 /* Analyse sections that aren't already flagged as needing a
11771 valid toc pointer. Exclude .fixup for the linux kernel.
11772 .fixup contains branches, but only back to the function that
11773 hit an exception. */
11774 if (!(isec->has_toc_reloc
11775 || (isec->flags & SEC_CODE) == 0
11776 || strcmp (isec->name, ".fixup") == 0
11777 || isec->call_check_done))
11778 {
11779 if (toc_adjusting_stub_needed (info, isec) < 0)
11780 return FALSE;
11781 }
11782 /* Make all sections use the TOC assigned for this object file.
11783 This will be wrong for pasted sections; We fix that in
11784 check_pasted_section(). */
11785 if (elf_gp (isec->owner) != 0)
11786 htab->toc_curr = elf_gp (isec->owner);
11787 }
11788
11789 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11790 return TRUE;
11791 }
11792
11793 /* Check that all .init and .fini sections use the same toc, if they
11794 have toc relocs. */
11795
11796 static bfd_boolean
11797 check_pasted_section (struct bfd_link_info *info, const char *name)
11798 {
11799 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11800
11801 if (o != NULL)
11802 {
11803 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11804 bfd_vma toc_off = 0;
11805 asection *i;
11806
11807 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11808 if (i->has_toc_reloc)
11809 {
11810 if (toc_off == 0)
11811 toc_off = htab->stub_group[i->id].toc_off;
11812 else if (toc_off != htab->stub_group[i->id].toc_off)
11813 return FALSE;
11814 }
11815
11816 if (toc_off == 0)
11817 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11818 if (i->makes_toc_func_call)
11819 {
11820 toc_off = htab->stub_group[i->id].toc_off;
11821 break;
11822 }
11823
11824 /* Make sure the whole pasted function uses the same toc offset. */
11825 if (toc_off != 0)
11826 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11827 htab->stub_group[i->id].toc_off = toc_off;
11828 }
11829 return TRUE;
11830 }
11831
11832 bfd_boolean
11833 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11834 {
11835 return (check_pasted_section (info, ".init")
11836 & check_pasted_section (info, ".fini"));
11837 }
11838
11839 /* See whether we can group stub sections together. Grouping stub
11840 sections may result in fewer stubs. More importantly, we need to
11841 put all .init* and .fini* stubs at the beginning of the .init or
11842 .fini output sections respectively, because glibc splits the
11843 _init and _fini functions into multiple parts. Putting a stub in
11844 the middle of a function is not a good idea. */
11845
11846 static void
11847 group_sections (struct ppc_link_hash_table *htab,
11848 bfd_size_type stub_group_size,
11849 bfd_boolean stubs_always_before_branch)
11850 {
11851 asection **list;
11852 bfd_size_type stub14_group_size;
11853 bfd_boolean suppress_size_errors;
11854
11855 suppress_size_errors = FALSE;
11856 stub14_group_size = stub_group_size >> 10;
11857 if (stub_group_size == 1)
11858 {
11859 /* Default values. */
11860 if (stubs_always_before_branch)
11861 {
11862 stub_group_size = 0x1e00000;
11863 stub14_group_size = 0x7800;
11864 }
11865 else
11866 {
11867 stub_group_size = 0x1c00000;
11868 stub14_group_size = 0x7000;
11869 }
11870 suppress_size_errors = TRUE;
11871 }
11872
11873 list = htab->input_list + htab->top_index;
11874 do
11875 {
11876 asection *tail = *list;
11877 while (tail != NULL)
11878 {
11879 asection *curr;
11880 asection *prev;
11881 bfd_size_type total;
11882 bfd_boolean big_sec;
11883 bfd_vma curr_toc;
11884
11885 curr = tail;
11886 total = tail->size;
11887 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11888 && ppc64_elf_section_data (tail)->has_14bit_branch
11889 ? stub14_group_size : stub_group_size);
11890 if (big_sec && !suppress_size_errors)
11891 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11892 tail->owner, tail);
11893 curr_toc = htab->stub_group[tail->id].toc_off;
11894
11895 while ((prev = PREV_SEC (curr)) != NULL
11896 && ((total += curr->output_offset - prev->output_offset)
11897 < (ppc64_elf_section_data (prev) != NULL
11898 && ppc64_elf_section_data (prev)->has_14bit_branch
11899 ? stub14_group_size : stub_group_size))
11900 && htab->stub_group[prev->id].toc_off == curr_toc)
11901 curr = prev;
11902
11903 /* OK, the size from the start of CURR to the end is less
11904 than stub_group_size and thus can be handled by one stub
11905 section. (or the tail section is itself larger than
11906 stub_group_size, in which case we may be toast.) We
11907 should really be keeping track of the total size of stubs
11908 added here, as stubs contribute to the final output
11909 section size. That's a little tricky, and this way will
11910 only break if stubs added make the total size more than
11911 2^25, ie. for the default stub_group_size, if stubs total
11912 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11913 do
11914 {
11915 prev = PREV_SEC (tail);
11916 /* Set up this stub group. */
11917 htab->stub_group[tail->id].link_sec = curr;
11918 }
11919 while (tail != curr && (tail = prev) != NULL);
11920
11921 /* But wait, there's more! Input sections up to stub_group_size
11922 bytes before the stub section can be handled by it too.
11923 Don't do this if we have a really large section after the
11924 stubs, as adding more stubs increases the chance that
11925 branches may not reach into the stub section. */
11926 if (!stubs_always_before_branch && !big_sec)
11927 {
11928 total = 0;
11929 while (prev != NULL
11930 && ((total += tail->output_offset - prev->output_offset)
11931 < (ppc64_elf_section_data (prev) != NULL
11932 && ppc64_elf_section_data (prev)->has_14bit_branch
11933 ? stub14_group_size : stub_group_size))
11934 && htab->stub_group[prev->id].toc_off == curr_toc)
11935 {
11936 tail = prev;
11937 prev = PREV_SEC (tail);
11938 htab->stub_group[tail->id].link_sec = curr;
11939 }
11940 }
11941 tail = prev;
11942 }
11943 }
11944 while (list-- != htab->input_list);
11945 free (htab->input_list);
11946 #undef PREV_SEC
11947 }
11948
11949 static const unsigned char glink_eh_frame_cie[] =
11950 {
11951 0, 0, 0, 16, /* length. */
11952 0, 0, 0, 0, /* id. */
11953 1, /* CIE version. */
11954 'z', 'R', 0, /* Augmentation string. */
11955 4, /* Code alignment. */
11956 0x78, /* Data alignment. */
11957 65, /* RA reg. */
11958 1, /* Augmentation size. */
11959 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11960 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
11961 0, 0, 0, 0
11962 };
11963
11964 /* Stripping output sections is normally done before dynamic section
11965 symbols have been allocated. This function is called later, and
11966 handles cases like htab->brlt which is mapped to its own output
11967 section. */
11968
11969 static void
11970 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11971 {
11972 if (isec->size == 0
11973 && isec->output_section->size == 0
11974 && !(isec->output_section->flags & SEC_KEEP)
11975 && !bfd_section_removed_from_list (info->output_bfd,
11976 isec->output_section)
11977 && elf_section_data (isec->output_section)->dynindx == 0)
11978 {
11979 isec->output_section->flags |= SEC_EXCLUDE;
11980 bfd_section_list_remove (info->output_bfd, isec->output_section);
11981 info->output_bfd->section_count--;
11982 }
11983 }
11984
11985 /* Determine and set the size of the stub section for a final link.
11986
11987 The basic idea here is to examine all the relocations looking for
11988 PC-relative calls to a target that is unreachable with a "bl"
11989 instruction. */
11990
11991 bfd_boolean
11992 ppc64_elf_size_stubs (struct bfd_link_info *info)
11993 {
11994 bfd_size_type stub_group_size;
11995 bfd_boolean stubs_always_before_branch;
11996 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11997
11998 if (htab == NULL)
11999 return FALSE;
12000
12001 if (htab->params->plt_thread_safe == -1 && !info->executable)
12002 htab->params->plt_thread_safe = 1;
12003 if (!htab->opd_abi)
12004 htab->params->plt_thread_safe = 0;
12005 else if (htab->params->plt_thread_safe == -1)
12006 {
12007 static const char *const thread_starter[] =
12008 {
12009 "pthread_create",
12010 /* libstdc++ */
12011 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12012 /* librt */
12013 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12014 "mq_notify", "create_timer",
12015 /* libanl */
12016 "getaddrinfo_a",
12017 /* libgomp */
12018 "GOMP_parallel",
12019 "GOMP_parallel_start",
12020 "GOMP_parallel_loop_static",
12021 "GOMP_parallel_loop_static_start",
12022 "GOMP_parallel_loop_dynamic",
12023 "GOMP_parallel_loop_dynamic_start",
12024 "GOMP_parallel_loop_guided",
12025 "GOMP_parallel_loop_guided_start",
12026 "GOMP_parallel_loop_runtime",
12027 "GOMP_parallel_loop_runtime_start",
12028 "GOMP_parallel_sections",
12029 "GOMP_parallel_sections_start",
12030 /* libgo */
12031 "__go_go",
12032 };
12033 unsigned i;
12034
12035 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
12036 {
12037 struct elf_link_hash_entry *h;
12038 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12039 FALSE, FALSE, TRUE);
12040 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12041 if (htab->params->plt_thread_safe)
12042 break;
12043 }
12044 }
12045 stubs_always_before_branch = htab->params->group_size < 0;
12046 if (htab->params->group_size < 0)
12047 stub_group_size = -htab->params->group_size;
12048 else
12049 stub_group_size = htab->params->group_size;
12050
12051 group_sections (htab, stub_group_size, stubs_always_before_branch);
12052
12053 while (1)
12054 {
12055 bfd *input_bfd;
12056 unsigned int bfd_indx;
12057 asection *stub_sec;
12058
12059 htab->stub_iteration += 1;
12060
12061 for (input_bfd = info->input_bfds, bfd_indx = 0;
12062 input_bfd != NULL;
12063 input_bfd = input_bfd->link.next, bfd_indx++)
12064 {
12065 Elf_Internal_Shdr *symtab_hdr;
12066 asection *section;
12067 Elf_Internal_Sym *local_syms = NULL;
12068
12069 if (!is_ppc64_elf (input_bfd))
12070 continue;
12071
12072 /* We'll need the symbol table in a second. */
12073 symtab_hdr = &elf_symtab_hdr (input_bfd);
12074 if (symtab_hdr->sh_info == 0)
12075 continue;
12076
12077 /* Walk over each section attached to the input bfd. */
12078 for (section = input_bfd->sections;
12079 section != NULL;
12080 section = section->next)
12081 {
12082 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12083
12084 /* If there aren't any relocs, then there's nothing more
12085 to do. */
12086 if ((section->flags & SEC_RELOC) == 0
12087 || (section->flags & SEC_ALLOC) == 0
12088 || (section->flags & SEC_LOAD) == 0
12089 || (section->flags & SEC_CODE) == 0
12090 || section->reloc_count == 0)
12091 continue;
12092
12093 /* If this section is a link-once section that will be
12094 discarded, then don't create any stubs. */
12095 if (section->output_section == NULL
12096 || section->output_section->owner != info->output_bfd)
12097 continue;
12098
12099 /* Get the relocs. */
12100 internal_relocs
12101 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12102 info->keep_memory);
12103 if (internal_relocs == NULL)
12104 goto error_ret_free_local;
12105
12106 /* Now examine each relocation. */
12107 irela = internal_relocs;
12108 irelaend = irela + section->reloc_count;
12109 for (; irela < irelaend; irela++)
12110 {
12111 enum elf_ppc64_reloc_type r_type;
12112 unsigned int r_indx;
12113 enum ppc_stub_type stub_type;
12114 struct ppc_stub_hash_entry *stub_entry;
12115 asection *sym_sec, *code_sec;
12116 bfd_vma sym_value, code_value;
12117 bfd_vma destination;
12118 unsigned long local_off;
12119 bfd_boolean ok_dest;
12120 struct ppc_link_hash_entry *hash;
12121 struct ppc_link_hash_entry *fdh;
12122 struct elf_link_hash_entry *h;
12123 Elf_Internal_Sym *sym;
12124 char *stub_name;
12125 const asection *id_sec;
12126 struct _opd_sec_data *opd;
12127 struct plt_entry *plt_ent;
12128
12129 r_type = ELF64_R_TYPE (irela->r_info);
12130 r_indx = ELF64_R_SYM (irela->r_info);
12131
12132 if (r_type >= R_PPC64_max)
12133 {
12134 bfd_set_error (bfd_error_bad_value);
12135 goto error_ret_free_internal;
12136 }
12137
12138 /* Only look for stubs on branch instructions. */
12139 if (r_type != R_PPC64_REL24
12140 && r_type != R_PPC64_REL14
12141 && r_type != R_PPC64_REL14_BRTAKEN
12142 && r_type != R_PPC64_REL14_BRNTAKEN)
12143 continue;
12144
12145 /* Now determine the call target, its name, value,
12146 section. */
12147 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12148 r_indx, input_bfd))
12149 goto error_ret_free_internal;
12150 hash = (struct ppc_link_hash_entry *) h;
12151
12152 ok_dest = FALSE;
12153 fdh = NULL;
12154 sym_value = 0;
12155 if (hash == NULL)
12156 {
12157 sym_value = sym->st_value;
12158 ok_dest = TRUE;
12159 }
12160 else if (hash->elf.root.type == bfd_link_hash_defined
12161 || hash->elf.root.type == bfd_link_hash_defweak)
12162 {
12163 sym_value = hash->elf.root.u.def.value;
12164 if (sym_sec->output_section != NULL)
12165 ok_dest = TRUE;
12166 }
12167 else if (hash->elf.root.type == bfd_link_hash_undefweak
12168 || hash->elf.root.type == bfd_link_hash_undefined)
12169 {
12170 /* Recognise an old ABI func code entry sym, and
12171 use the func descriptor sym instead if it is
12172 defined. */
12173 if (hash->elf.root.root.string[0] == '.'
12174 && (fdh = lookup_fdh (hash, htab)) != NULL)
12175 {
12176 if (fdh->elf.root.type == bfd_link_hash_defined
12177 || fdh->elf.root.type == bfd_link_hash_defweak)
12178 {
12179 sym_sec = fdh->elf.root.u.def.section;
12180 sym_value = fdh->elf.root.u.def.value;
12181 if (sym_sec->output_section != NULL)
12182 ok_dest = TRUE;
12183 }
12184 else
12185 fdh = NULL;
12186 }
12187 }
12188 else
12189 {
12190 bfd_set_error (bfd_error_bad_value);
12191 goto error_ret_free_internal;
12192 }
12193
12194 destination = 0;
12195 local_off = 0;
12196 if (ok_dest)
12197 {
12198 sym_value += irela->r_addend;
12199 destination = (sym_value
12200 + sym_sec->output_offset
12201 + sym_sec->output_section->vma);
12202 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12203 ? hash->elf.other
12204 : sym->st_other);
12205 }
12206
12207 code_sec = sym_sec;
12208 code_value = sym_value;
12209 opd = get_opd_info (sym_sec);
12210 if (opd != NULL)
12211 {
12212 bfd_vma dest;
12213
12214 if (hash == NULL && opd->adjust != NULL)
12215 {
12216 long adjust = opd->adjust[OPD_NDX (sym_value)];
12217 if (adjust == -1)
12218 continue;
12219 code_value += adjust;
12220 sym_value += adjust;
12221 }
12222 dest = opd_entry_value (sym_sec, sym_value,
12223 &code_sec, &code_value, FALSE);
12224 if (dest != (bfd_vma) -1)
12225 {
12226 destination = dest;
12227 if (fdh != NULL)
12228 {
12229 /* Fixup old ABI sym to point at code
12230 entry. */
12231 hash->elf.root.type = bfd_link_hash_defweak;
12232 hash->elf.root.u.def.section = code_sec;
12233 hash->elf.root.u.def.value = code_value;
12234 }
12235 }
12236 }
12237
12238 /* Determine what (if any) linker stub is needed. */
12239 plt_ent = NULL;
12240 stub_type = ppc_type_of_stub (section, irela, &hash,
12241 &plt_ent, destination,
12242 local_off);
12243
12244 if (stub_type != ppc_stub_plt_call)
12245 {
12246 /* Check whether we need a TOC adjusting stub.
12247 Since the linker pastes together pieces from
12248 different object files when creating the
12249 _init and _fini functions, it may be that a
12250 call to what looks like a local sym is in
12251 fact a call needing a TOC adjustment. */
12252 if (code_sec != NULL
12253 && code_sec->output_section != NULL
12254 && (htab->stub_group[code_sec->id].toc_off
12255 != htab->stub_group[section->id].toc_off)
12256 && (code_sec->has_toc_reloc
12257 || code_sec->makes_toc_func_call))
12258 stub_type = ppc_stub_long_branch_r2off;
12259 }
12260
12261 if (stub_type == ppc_stub_none)
12262 continue;
12263
12264 /* __tls_get_addr calls might be eliminated. */
12265 if (stub_type != ppc_stub_plt_call
12266 && hash != NULL
12267 && (hash == htab->tls_get_addr
12268 || hash == htab->tls_get_addr_fd)
12269 && section->has_tls_reloc
12270 && irela != internal_relocs)
12271 {
12272 /* Get tls info. */
12273 unsigned char *tls_mask;
12274
12275 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12276 irela - 1, input_bfd))
12277 goto error_ret_free_internal;
12278 if (*tls_mask != 0)
12279 continue;
12280 }
12281
12282 if (stub_type == ppc_stub_plt_call
12283 && irela + 1 < irelaend
12284 && irela[1].r_offset == irela->r_offset + 4
12285 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12286 {
12287 if (!tocsave_find (htab, INSERT,
12288 &local_syms, irela + 1, input_bfd))
12289 goto error_ret_free_internal;
12290 }
12291 else if (stub_type == ppc_stub_plt_call)
12292 stub_type = ppc_stub_plt_call_r2save;
12293
12294 /* Support for grouping stub sections. */
12295 id_sec = htab->stub_group[section->id].link_sec;
12296
12297 /* Get the name of this stub. */
12298 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12299 if (!stub_name)
12300 goto error_ret_free_internal;
12301
12302 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12303 stub_name, FALSE, FALSE);
12304 if (stub_entry != NULL)
12305 {
12306 /* The proper stub has already been created. */
12307 free (stub_name);
12308 if (stub_type == ppc_stub_plt_call_r2save)
12309 stub_entry->stub_type = stub_type;
12310 continue;
12311 }
12312
12313 stub_entry = ppc_add_stub (stub_name, section, info);
12314 if (stub_entry == NULL)
12315 {
12316 free (stub_name);
12317 error_ret_free_internal:
12318 if (elf_section_data (section)->relocs == NULL)
12319 free (internal_relocs);
12320 error_ret_free_local:
12321 if (local_syms != NULL
12322 && (symtab_hdr->contents
12323 != (unsigned char *) local_syms))
12324 free (local_syms);
12325 return FALSE;
12326 }
12327
12328 stub_entry->stub_type = stub_type;
12329 if (stub_type != ppc_stub_plt_call
12330 && stub_type != ppc_stub_plt_call_r2save)
12331 {
12332 stub_entry->target_value = code_value;
12333 stub_entry->target_section = code_sec;
12334 }
12335 else
12336 {
12337 stub_entry->target_value = sym_value;
12338 stub_entry->target_section = sym_sec;
12339 }
12340 stub_entry->h = hash;
12341 stub_entry->plt_ent = plt_ent;
12342 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12343
12344 if (stub_entry->h != NULL)
12345 htab->stub_globals += 1;
12346 }
12347
12348 /* We're done with the internal relocs, free them. */
12349 if (elf_section_data (section)->relocs != internal_relocs)
12350 free (internal_relocs);
12351 }
12352
12353 if (local_syms != NULL
12354 && symtab_hdr->contents != (unsigned char *) local_syms)
12355 {
12356 if (!info->keep_memory)
12357 free (local_syms);
12358 else
12359 symtab_hdr->contents = (unsigned char *) local_syms;
12360 }
12361 }
12362
12363 /* We may have added some stubs. Find out the new size of the
12364 stub sections. */
12365 for (stub_sec = htab->params->stub_bfd->sections;
12366 stub_sec != NULL;
12367 stub_sec = stub_sec->next)
12368 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12369 {
12370 stub_sec->rawsize = stub_sec->size;
12371 stub_sec->size = 0;
12372 stub_sec->reloc_count = 0;
12373 stub_sec->flags &= ~SEC_RELOC;
12374 }
12375
12376 htab->brlt->size = 0;
12377 htab->brlt->reloc_count = 0;
12378 htab->brlt->flags &= ~SEC_RELOC;
12379 if (htab->relbrlt != NULL)
12380 htab->relbrlt->size = 0;
12381
12382 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12383
12384 if (info->emitrelocations
12385 && htab->glink != NULL && htab->glink->size != 0)
12386 {
12387 htab->glink->reloc_count = 1;
12388 htab->glink->flags |= SEC_RELOC;
12389 }
12390
12391 if (htab->glink_eh_frame != NULL
12392 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12393 && htab->glink_eh_frame->output_section->size != 0)
12394 {
12395 size_t size = 0, align;
12396
12397 for (stub_sec = htab->params->stub_bfd->sections;
12398 stub_sec != NULL;
12399 stub_sec = stub_sec->next)
12400 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12401 size += 24;
12402 if (htab->glink != NULL && htab->glink->size != 0)
12403 size += 24;
12404 if (size != 0)
12405 size += sizeof (glink_eh_frame_cie);
12406 align = 1;
12407 align <<= htab->glink_eh_frame->output_section->alignment_power;
12408 align -= 1;
12409 size = (size + align) & ~align;
12410 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12411 htab->glink_eh_frame->size = size;
12412 }
12413
12414 if (htab->params->plt_stub_align != 0)
12415 for (stub_sec = htab->params->stub_bfd->sections;
12416 stub_sec != NULL;
12417 stub_sec = stub_sec->next)
12418 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12419 stub_sec->size = ((stub_sec->size
12420 + (1 << htab->params->plt_stub_align) - 1)
12421 & (-1 << htab->params->plt_stub_align));
12422
12423 for (stub_sec = htab->params->stub_bfd->sections;
12424 stub_sec != NULL;
12425 stub_sec = stub_sec->next)
12426 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12427 && stub_sec->rawsize != stub_sec->size)
12428 break;
12429
12430 /* Exit from this loop when no stubs have been added, and no stubs
12431 have changed size. */
12432 if (stub_sec == NULL
12433 && (htab->glink_eh_frame == NULL
12434 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12435 break;
12436
12437 /* Ask the linker to do its stuff. */
12438 (*htab->params->layout_sections_again) ();
12439 }
12440
12441 if (htab->glink_eh_frame != NULL
12442 && htab->glink_eh_frame->size != 0)
12443 {
12444 bfd_vma val;
12445 bfd_byte *p, *last_fde;
12446 size_t last_fde_len, size, align, pad;
12447 asection *stub_sec;
12448
12449 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12450 if (p == NULL)
12451 return FALSE;
12452 htab->glink_eh_frame->contents = p;
12453 last_fde = p;
12454
12455 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12456 /* CIE length (rewrite in case little-endian). */
12457 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12458 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12459 p += sizeof (glink_eh_frame_cie);
12460
12461 for (stub_sec = htab->params->stub_bfd->sections;
12462 stub_sec != NULL;
12463 stub_sec = stub_sec->next)
12464 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12465 {
12466 last_fde = p;
12467 last_fde_len = 20;
12468 /* FDE length. */
12469 bfd_put_32 (htab->elf.dynobj, 20, p);
12470 p += 4;
12471 /* CIE pointer. */
12472 val = p - htab->glink_eh_frame->contents;
12473 bfd_put_32 (htab->elf.dynobj, val, p);
12474 p += 4;
12475 /* Offset to stub section, written later. */
12476 p += 4;
12477 /* stub section size. */
12478 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12479 p += 4;
12480 /* Augmentation. */
12481 p += 1;
12482 /* Pad. */
12483 p += 7;
12484 }
12485 if (htab->glink != NULL && htab->glink->size != 0)
12486 {
12487 last_fde = p;
12488 last_fde_len = 20;
12489 /* FDE length. */
12490 bfd_put_32 (htab->elf.dynobj, 20, p);
12491 p += 4;
12492 /* CIE pointer. */
12493 val = p - htab->glink_eh_frame->contents;
12494 bfd_put_32 (htab->elf.dynobj, val, p);
12495 p += 4;
12496 /* Offset to .glink, written later. */
12497 p += 4;
12498 /* .glink size. */
12499 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12500 p += 4;
12501 /* Augmentation. */
12502 p += 1;
12503
12504 *p++ = DW_CFA_advance_loc + 1;
12505 *p++ = DW_CFA_register;
12506 *p++ = 65;
12507 *p++ = 12;
12508 *p++ = DW_CFA_advance_loc + 4;
12509 *p++ = DW_CFA_restore_extended;
12510 *p++ = 65;
12511 }
12512 /* Subsume any padding into the last FDE if user .eh_frame
12513 sections are aligned more than glink_eh_frame. Otherwise any
12514 zero padding will be seen as a terminator. */
12515 size = p - htab->glink_eh_frame->contents;
12516 align = 1;
12517 align <<= htab->glink_eh_frame->output_section->alignment_power;
12518 align -= 1;
12519 pad = ((size + align) & ~align) - size;
12520 htab->glink_eh_frame->size = size + pad;
12521 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12522 }
12523
12524 maybe_strip_output (info, htab->brlt);
12525 if (htab->glink_eh_frame != NULL)
12526 maybe_strip_output (info, htab->glink_eh_frame);
12527
12528 return TRUE;
12529 }
12530
12531 /* Called after we have determined section placement. If sections
12532 move, we'll be called again. Provide a value for TOCstart. */
12533
12534 bfd_vma
12535 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12536 {
12537 asection *s;
12538 bfd_vma TOCstart;
12539
12540 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12541 order. The TOC starts where the first of these sections starts. */
12542 s = bfd_get_section_by_name (obfd, ".got");
12543 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12544 s = bfd_get_section_by_name (obfd, ".toc");
12545 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12546 s = bfd_get_section_by_name (obfd, ".tocbss");
12547 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12548 s = bfd_get_section_by_name (obfd, ".plt");
12549 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12550 {
12551 /* This may happen for
12552 o references to TOC base (SYM@toc / TOC[tc0]) without a
12553 .toc directive
12554 o bad linker script
12555 o --gc-sections and empty TOC sections
12556
12557 FIXME: Warn user? */
12558
12559 /* Look for a likely section. We probably won't even be
12560 using TOCstart. */
12561 for (s = obfd->sections; s != NULL; s = s->next)
12562 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12563 | SEC_EXCLUDE))
12564 == (SEC_ALLOC | SEC_SMALL_DATA))
12565 break;
12566 if (s == NULL)
12567 for (s = obfd->sections; s != NULL; s = s->next)
12568 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12569 == (SEC_ALLOC | SEC_SMALL_DATA))
12570 break;
12571 if (s == NULL)
12572 for (s = obfd->sections; s != NULL; s = s->next)
12573 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12574 == SEC_ALLOC)
12575 break;
12576 if (s == NULL)
12577 for (s = obfd->sections; s != NULL; s = s->next)
12578 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12579 break;
12580 }
12581
12582 TOCstart = 0;
12583 if (s != NULL)
12584 TOCstart = s->output_section->vma + s->output_offset;
12585
12586 _bfd_set_gp_value (obfd, TOCstart);
12587
12588 if (info != NULL && s != NULL)
12589 {
12590 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12591
12592 if (htab != NULL)
12593 {
12594 if (htab->elf.hgot != NULL)
12595 {
12596 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12597 htab->elf.hgot->root.u.def.section = s;
12598 }
12599 }
12600 else
12601 {
12602 struct bfd_link_hash_entry *bh = NULL;
12603 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12604 s, TOC_BASE_OFF, NULL, FALSE,
12605 FALSE, &bh);
12606 }
12607 }
12608 return TOCstart;
12609 }
12610
12611 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12612 write out any global entry stubs. */
12613
12614 static bfd_boolean
12615 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12616 {
12617 struct bfd_link_info *info;
12618 struct ppc_link_hash_table *htab;
12619 struct plt_entry *pent;
12620 asection *s;
12621
12622 if (h->root.type == bfd_link_hash_indirect)
12623 return TRUE;
12624
12625 if (!h->pointer_equality_needed)
12626 return TRUE;
12627
12628 if (h->def_regular)
12629 return TRUE;
12630
12631 info = inf;
12632 htab = ppc_hash_table (info);
12633 if (htab == NULL)
12634 return FALSE;
12635
12636 s = htab->glink;
12637 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12638 if (pent->plt.offset != (bfd_vma) -1
12639 && pent->addend == 0)
12640 {
12641 bfd_byte *p;
12642 asection *plt;
12643 bfd_vma off;
12644
12645 p = s->contents + h->root.u.def.value;
12646 plt = htab->elf.splt;
12647 if (!htab->elf.dynamic_sections_created
12648 || h->dynindx == -1)
12649 plt = htab->elf.iplt;
12650 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12651 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12652
12653 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12654 {
12655 info->callbacks->einfo
12656 (_("%P: linkage table error against `%T'\n"),
12657 h->root.root.string);
12658 bfd_set_error (bfd_error_bad_value);
12659 htab->stub_error = TRUE;
12660 }
12661
12662 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12663 if (htab->params->emit_stub_syms)
12664 {
12665 size_t len = strlen (h->root.root.string);
12666 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12667
12668 if (name == NULL)
12669 return FALSE;
12670
12671 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12672 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12673 if (h == NULL)
12674 return FALSE;
12675 if (h->root.type == bfd_link_hash_new)
12676 {
12677 h->root.type = bfd_link_hash_defined;
12678 h->root.u.def.section = s;
12679 h->root.u.def.value = p - s->contents;
12680 h->ref_regular = 1;
12681 h->def_regular = 1;
12682 h->ref_regular_nonweak = 1;
12683 h->forced_local = 1;
12684 h->non_elf = 0;
12685 h->root.linker_def = 1;
12686 }
12687 }
12688
12689 if (PPC_HA (off) != 0)
12690 {
12691 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12692 p += 4;
12693 }
12694 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12695 p += 4;
12696 bfd_put_32 (s->owner, MTCTR_R12, p);
12697 p += 4;
12698 bfd_put_32 (s->owner, BCTR, p);
12699 break;
12700 }
12701 return TRUE;
12702 }
12703
12704 /* Build all the stubs associated with the current output file.
12705 The stubs are kept in a hash table attached to the main linker
12706 hash table. This function is called via gldelf64ppc_finish. */
12707
12708 bfd_boolean
12709 ppc64_elf_build_stubs (struct bfd_link_info *info,
12710 char **stats)
12711 {
12712 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12713 asection *stub_sec;
12714 bfd_byte *p;
12715 int stub_sec_count = 0;
12716
12717 if (htab == NULL)
12718 return FALSE;
12719
12720 /* Allocate memory to hold the linker stubs. */
12721 for (stub_sec = htab->params->stub_bfd->sections;
12722 stub_sec != NULL;
12723 stub_sec = stub_sec->next)
12724 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12725 && stub_sec->size != 0)
12726 {
12727 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12728 if (stub_sec->contents == NULL)
12729 return FALSE;
12730 /* We want to check that built size is the same as calculated
12731 size. rawsize is a convenient location to use. */
12732 stub_sec->rawsize = stub_sec->size;
12733 stub_sec->size = 0;
12734 }
12735
12736 if (htab->glink != NULL && htab->glink->size != 0)
12737 {
12738 unsigned int indx;
12739 bfd_vma plt0;
12740
12741 /* Build the .glink plt call stub. */
12742 if (htab->params->emit_stub_syms)
12743 {
12744 struct elf_link_hash_entry *h;
12745 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12746 TRUE, FALSE, FALSE);
12747 if (h == NULL)
12748 return FALSE;
12749 if (h->root.type == bfd_link_hash_new)
12750 {
12751 h->root.type = bfd_link_hash_defined;
12752 h->root.u.def.section = htab->glink;
12753 h->root.u.def.value = 8;
12754 h->ref_regular = 1;
12755 h->def_regular = 1;
12756 h->ref_regular_nonweak = 1;
12757 h->forced_local = 1;
12758 h->non_elf = 0;
12759 h->root.linker_def = 1;
12760 }
12761 }
12762 plt0 = (htab->elf.splt->output_section->vma
12763 + htab->elf.splt->output_offset
12764 - 16);
12765 if (info->emitrelocations)
12766 {
12767 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12768 if (r == NULL)
12769 return FALSE;
12770 r->r_offset = (htab->glink->output_offset
12771 + htab->glink->output_section->vma);
12772 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12773 r->r_addend = plt0;
12774 }
12775 p = htab->glink->contents;
12776 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12777 bfd_put_64 (htab->glink->owner, plt0, p);
12778 p += 8;
12779 if (htab->opd_abi)
12780 {
12781 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12782 p += 4;
12783 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12784 p += 4;
12785 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12786 p += 4;
12787 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12788 p += 4;
12789 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12790 p += 4;
12791 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12792 p += 4;
12793 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12794 p += 4;
12795 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12796 p += 4;
12797 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12798 p += 4;
12799 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12800 p += 4;
12801 }
12802 else
12803 {
12804 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12805 p += 4;
12806 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12807 p += 4;
12808 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12809 p += 4;
12810 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12811 p += 4;
12812 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12813 p += 4;
12814 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12815 p += 4;
12816 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12817 p += 4;
12818 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12819 p += 4;
12820 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12821 p += 4;
12822 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12823 p += 4;
12824 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12825 p += 4;
12826 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12827 p += 4;
12828 }
12829 bfd_put_32 (htab->glink->owner, BCTR, p);
12830 p += 4;
12831 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12832 {
12833 bfd_put_32 (htab->glink->owner, NOP, p);
12834 p += 4;
12835 }
12836
12837 /* Build the .glink lazy link call stubs. */
12838 indx = 0;
12839 while (p < htab->glink->contents + htab->glink->rawsize)
12840 {
12841 if (htab->opd_abi)
12842 {
12843 if (indx < 0x8000)
12844 {
12845 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12846 p += 4;
12847 }
12848 else
12849 {
12850 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12851 p += 4;
12852 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12853 p);
12854 p += 4;
12855 }
12856 }
12857 bfd_put_32 (htab->glink->owner,
12858 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12859 indx++;
12860 p += 4;
12861 }
12862
12863 /* Build .glink global entry stubs. */
12864 if (htab->glink->size > htab->glink->rawsize)
12865 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12866 }
12867
12868 if (htab->brlt != NULL && htab->brlt->size != 0)
12869 {
12870 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12871 htab->brlt->size);
12872 if (htab->brlt->contents == NULL)
12873 return FALSE;
12874 }
12875 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12876 {
12877 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12878 htab->relbrlt->size);
12879 if (htab->relbrlt->contents == NULL)
12880 return FALSE;
12881 }
12882
12883 /* Build the stubs as directed by the stub hash table. */
12884 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12885
12886 if (htab->relbrlt != NULL)
12887 htab->relbrlt->reloc_count = 0;
12888
12889 if (htab->params->plt_stub_align != 0)
12890 for (stub_sec = htab->params->stub_bfd->sections;
12891 stub_sec != NULL;
12892 stub_sec = stub_sec->next)
12893 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12894 stub_sec->size = ((stub_sec->size
12895 + (1 << htab->params->plt_stub_align) - 1)
12896 & (-1 << htab->params->plt_stub_align));
12897
12898 for (stub_sec = htab->params->stub_bfd->sections;
12899 stub_sec != NULL;
12900 stub_sec = stub_sec->next)
12901 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12902 {
12903 stub_sec_count += 1;
12904 if (stub_sec->rawsize != stub_sec->size)
12905 break;
12906 }
12907
12908 /* Note that the glink_eh_frame check here is not only testing that
12909 the generated size matched the calculated size but also that
12910 bfd_elf_discard_info didn't make any changes to the section. */
12911 if (stub_sec != NULL
12912 || (htab->glink_eh_frame != NULL
12913 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12914 {
12915 htab->stub_error = TRUE;
12916 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12917 }
12918
12919 if (htab->stub_error)
12920 return FALSE;
12921
12922 if (stats != NULL)
12923 {
12924 *stats = bfd_malloc (500);
12925 if (*stats == NULL)
12926 return FALSE;
12927
12928 sprintf (*stats, _("linker stubs in %u group%s\n"
12929 " branch %lu\n"
12930 " toc adjust %lu\n"
12931 " long branch %lu\n"
12932 " long toc adj %lu\n"
12933 " plt call %lu\n"
12934 " plt call toc %lu\n"
12935 " global entry %lu"),
12936 stub_sec_count,
12937 stub_sec_count == 1 ? "" : "s",
12938 htab->stub_count[ppc_stub_long_branch - 1],
12939 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12940 htab->stub_count[ppc_stub_plt_branch - 1],
12941 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12942 htab->stub_count[ppc_stub_plt_call - 1],
12943 htab->stub_count[ppc_stub_plt_call_r2save - 1],
12944 htab->stub_count[ppc_stub_global_entry - 1]);
12945 }
12946 return TRUE;
12947 }
12948
12949 /* This function undoes the changes made by add_symbol_adjust. */
12950
12951 static bfd_boolean
12952 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12953 {
12954 struct ppc_link_hash_entry *eh;
12955
12956 if (h->root.type == bfd_link_hash_indirect)
12957 return TRUE;
12958
12959 eh = (struct ppc_link_hash_entry *) h;
12960 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12961 return TRUE;
12962
12963 eh->elf.root.type = bfd_link_hash_undefined;
12964 return TRUE;
12965 }
12966
12967 void
12968 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12969 {
12970 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12971
12972 if (htab != NULL)
12973 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12974 }
12975
12976 /* What to do when ld finds relocations against symbols defined in
12977 discarded sections. */
12978
12979 static unsigned int
12980 ppc64_elf_action_discarded (asection *sec)
12981 {
12982 if (strcmp (".opd", sec->name) == 0)
12983 return 0;
12984
12985 if (strcmp (".toc", sec->name) == 0)
12986 return 0;
12987
12988 if (strcmp (".toc1", sec->name) == 0)
12989 return 0;
12990
12991 return _bfd_elf_default_action_discarded (sec);
12992 }
12993
12994 /* The RELOCATE_SECTION function is called by the ELF backend linker
12995 to handle the relocations for a section.
12996
12997 The relocs are always passed as Rela structures; if the section
12998 actually uses Rel structures, the r_addend field will always be
12999 zero.
13000
13001 This function is responsible for adjust the section contents as
13002 necessary, and (if using Rela relocs and generating a
13003 relocatable output file) adjusting the reloc addend as
13004 necessary.
13005
13006 This function does not have to worry about setting the reloc
13007 address or the reloc symbol index.
13008
13009 LOCAL_SYMS is a pointer to the swapped in local symbols.
13010
13011 LOCAL_SECTIONS is an array giving the section in the input file
13012 corresponding to the st_shndx field of each local symbol.
13013
13014 The global hash table entry for the global symbols can be found
13015 via elf_sym_hashes (input_bfd).
13016
13017 When generating relocatable output, this function must handle
13018 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13019 going to be the section symbol corresponding to the output
13020 section, which means that the addend must be adjusted
13021 accordingly. */
13022
13023 static bfd_boolean
13024 ppc64_elf_relocate_section (bfd *output_bfd,
13025 struct bfd_link_info *info,
13026 bfd *input_bfd,
13027 asection *input_section,
13028 bfd_byte *contents,
13029 Elf_Internal_Rela *relocs,
13030 Elf_Internal_Sym *local_syms,
13031 asection **local_sections)
13032 {
13033 struct ppc_link_hash_table *htab;
13034 Elf_Internal_Shdr *symtab_hdr;
13035 struct elf_link_hash_entry **sym_hashes;
13036 Elf_Internal_Rela *rel;
13037 Elf_Internal_Rela *relend;
13038 Elf_Internal_Rela outrel;
13039 bfd_byte *loc;
13040 struct got_entry **local_got_ents;
13041 bfd_vma TOCstart;
13042 bfd_boolean ret = TRUE;
13043 bfd_boolean is_opd;
13044 /* Assume 'at' branch hints. */
13045 bfd_boolean is_isa_v2 = TRUE;
13046 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13047
13048 /* Initialize howto table if needed. */
13049 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13050 ppc_howto_init ();
13051
13052 htab = ppc_hash_table (info);
13053 if (htab == NULL)
13054 return FALSE;
13055
13056 /* Don't relocate stub sections. */
13057 if (input_section->owner == htab->params->stub_bfd)
13058 return TRUE;
13059
13060 BFD_ASSERT (is_ppc64_elf (input_bfd));
13061
13062 local_got_ents = elf_local_got_ents (input_bfd);
13063 TOCstart = elf_gp (output_bfd);
13064 symtab_hdr = &elf_symtab_hdr (input_bfd);
13065 sym_hashes = elf_sym_hashes (input_bfd);
13066 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13067
13068 rel = relocs;
13069 relend = relocs + input_section->reloc_count;
13070 for (; rel < relend; rel++)
13071 {
13072 enum elf_ppc64_reloc_type r_type;
13073 bfd_vma addend;
13074 bfd_reloc_status_type r;
13075 Elf_Internal_Sym *sym;
13076 asection *sec;
13077 struct elf_link_hash_entry *h_elf;
13078 struct ppc_link_hash_entry *h;
13079 struct ppc_link_hash_entry *fdh;
13080 const char *sym_name;
13081 unsigned long r_symndx, toc_symndx;
13082 bfd_vma toc_addend;
13083 unsigned char tls_mask, tls_gd, tls_type;
13084 unsigned char sym_type;
13085 bfd_vma relocation;
13086 bfd_boolean unresolved_reloc;
13087 bfd_boolean warned;
13088 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13089 unsigned int insn;
13090 unsigned int mask;
13091 struct ppc_stub_hash_entry *stub_entry;
13092 bfd_vma max_br_offset;
13093 bfd_vma from;
13094 const Elf_Internal_Rela orig_rel = *rel;
13095 reloc_howto_type *howto;
13096 struct reloc_howto_struct alt_howto;
13097
13098 r_type = ELF64_R_TYPE (rel->r_info);
13099 r_symndx = ELF64_R_SYM (rel->r_info);
13100
13101 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13102 symbol of the previous ADDR64 reloc. The symbol gives us the
13103 proper TOC base to use. */
13104 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13105 && rel != relocs
13106 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
13107 && is_opd)
13108 r_symndx = ELF64_R_SYM (rel[-1].r_info);
13109
13110 sym = NULL;
13111 sec = NULL;
13112 h_elf = NULL;
13113 sym_name = NULL;
13114 unresolved_reloc = FALSE;
13115 warned = FALSE;
13116
13117 if (r_symndx < symtab_hdr->sh_info)
13118 {
13119 /* It's a local symbol. */
13120 struct _opd_sec_data *opd;
13121
13122 sym = local_syms + r_symndx;
13123 sec = local_sections[r_symndx];
13124 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13125 sym_type = ELF64_ST_TYPE (sym->st_info);
13126 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13127 opd = get_opd_info (sec);
13128 if (opd != NULL && opd->adjust != NULL)
13129 {
13130 long adjust = opd->adjust[OPD_NDX (sym->st_value
13131 + rel->r_addend)];
13132 if (adjust == -1)
13133 relocation = 0;
13134 else
13135 {
13136 /* If this is a relocation against the opd section sym
13137 and we have edited .opd, adjust the reloc addend so
13138 that ld -r and ld --emit-relocs output is correct.
13139 If it is a reloc against some other .opd symbol,
13140 then the symbol value will be adjusted later. */
13141 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13142 rel->r_addend += adjust;
13143 else
13144 relocation += adjust;
13145 }
13146 }
13147 }
13148 else
13149 {
13150 bfd_boolean ignored;
13151
13152 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13153 r_symndx, symtab_hdr, sym_hashes,
13154 h_elf, sec, relocation,
13155 unresolved_reloc, warned, ignored);
13156 sym_name = h_elf->root.root.string;
13157 sym_type = h_elf->type;
13158 if (sec != NULL
13159 && sec->owner == output_bfd
13160 && strcmp (sec->name, ".opd") == 0)
13161 {
13162 /* This is a symbol defined in a linker script. All
13163 such are defined in output sections, even those
13164 defined by simple assignment from a symbol defined in
13165 an input section. Transfer the symbol to an
13166 appropriate input .opd section, so that a branch to
13167 this symbol will be mapped to the location specified
13168 by the opd entry. */
13169 struct bfd_link_order *lo;
13170 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13171 if (lo->type == bfd_indirect_link_order)
13172 {
13173 asection *isec = lo->u.indirect.section;
13174 if (h_elf->root.u.def.value >= isec->output_offset
13175 && h_elf->root.u.def.value < (isec->output_offset
13176 + isec->size))
13177 {
13178 h_elf->root.u.def.value -= isec->output_offset;
13179 h_elf->root.u.def.section = isec;
13180 sec = isec;
13181 break;
13182 }
13183 }
13184 }
13185 }
13186 h = (struct ppc_link_hash_entry *) h_elf;
13187
13188 if (sec != NULL && discarded_section (sec))
13189 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13190 rel, 1, relend,
13191 ppc64_elf_howto_table[r_type], 0,
13192 contents);
13193
13194 if (info->relocatable)
13195 continue;
13196
13197 if (h != NULL && &h->elf == htab->elf.hgot)
13198 {
13199 relocation = (TOCstart
13200 + htab->stub_group[input_section->id].toc_off);
13201 sec = bfd_abs_section_ptr;
13202 unresolved_reloc = FALSE;
13203 }
13204
13205 /* TLS optimizations. Replace instruction sequences and relocs
13206 based on information we collected in tls_optimize. We edit
13207 RELOCS so that --emit-relocs will output something sensible
13208 for the final instruction stream. */
13209 tls_mask = 0;
13210 tls_gd = 0;
13211 toc_symndx = 0;
13212 if (h != NULL)
13213 tls_mask = h->tls_mask;
13214 else if (local_got_ents != NULL)
13215 {
13216 struct plt_entry **local_plt = (struct plt_entry **)
13217 (local_got_ents + symtab_hdr->sh_info);
13218 unsigned char *lgot_masks = (unsigned char *)
13219 (local_plt + symtab_hdr->sh_info);
13220 tls_mask = lgot_masks[r_symndx];
13221 }
13222 if (tls_mask == 0
13223 && (r_type == R_PPC64_TLS
13224 || r_type == R_PPC64_TLSGD
13225 || r_type == R_PPC64_TLSLD))
13226 {
13227 /* Check for toc tls entries. */
13228 unsigned char *toc_tls;
13229
13230 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13231 &local_syms, rel, input_bfd))
13232 return FALSE;
13233
13234 if (toc_tls)
13235 tls_mask = *toc_tls;
13236 }
13237
13238 /* Check that tls relocs are used with tls syms, and non-tls
13239 relocs are used with non-tls syms. */
13240 if (r_symndx != STN_UNDEF
13241 && r_type != R_PPC64_NONE
13242 && (h == NULL
13243 || h->elf.root.type == bfd_link_hash_defined
13244 || h->elf.root.type == bfd_link_hash_defweak)
13245 && (IS_PPC64_TLS_RELOC (r_type)
13246 != (sym_type == STT_TLS
13247 || (sym_type == STT_SECTION
13248 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13249 {
13250 if (tls_mask != 0
13251 && (r_type == R_PPC64_TLS
13252 || r_type == R_PPC64_TLSGD
13253 || r_type == R_PPC64_TLSLD))
13254 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13255 ;
13256 else
13257 info->callbacks->einfo
13258 (!IS_PPC64_TLS_RELOC (r_type)
13259 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13260 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13261 input_bfd, input_section, rel->r_offset,
13262 ppc64_elf_howto_table[r_type]->name,
13263 sym_name);
13264 }
13265
13266 /* Ensure reloc mapping code below stays sane. */
13267 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13268 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13269 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13270 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13271 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13272 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13273 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13274 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13275 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13276 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13277 abort ();
13278
13279 switch (r_type)
13280 {
13281 default:
13282 break;
13283
13284 case R_PPC64_LO_DS_OPT:
13285 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13286 if ((insn & (0x3f << 26)) != 58u << 26)
13287 abort ();
13288 insn += (14u << 26) - (58u << 26);
13289 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13290 r_type = R_PPC64_TOC16_LO;
13291 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13292 break;
13293
13294 case R_PPC64_TOC16:
13295 case R_PPC64_TOC16_LO:
13296 case R_PPC64_TOC16_DS:
13297 case R_PPC64_TOC16_LO_DS:
13298 {
13299 /* Check for toc tls entries. */
13300 unsigned char *toc_tls;
13301 int retval;
13302
13303 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13304 &local_syms, rel, input_bfd);
13305 if (retval == 0)
13306 return FALSE;
13307
13308 if (toc_tls)
13309 {
13310 tls_mask = *toc_tls;
13311 if (r_type == R_PPC64_TOC16_DS
13312 || r_type == R_PPC64_TOC16_LO_DS)
13313 {
13314 if (tls_mask != 0
13315 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13316 goto toctprel;
13317 }
13318 else
13319 {
13320 /* If we found a GD reloc pair, then we might be
13321 doing a GD->IE transition. */
13322 if (retval == 2)
13323 {
13324 tls_gd = TLS_TPRELGD;
13325 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13326 goto tls_ldgd_opt;
13327 }
13328 else if (retval == 3)
13329 {
13330 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13331 goto tls_ldgd_opt;
13332 }
13333 }
13334 }
13335 }
13336 break;
13337
13338 case R_PPC64_GOT_TPREL16_HI:
13339 case R_PPC64_GOT_TPREL16_HA:
13340 if (tls_mask != 0
13341 && (tls_mask & TLS_TPREL) == 0)
13342 {
13343 rel->r_offset -= d_offset;
13344 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13345 r_type = R_PPC64_NONE;
13346 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13347 }
13348 break;
13349
13350 case R_PPC64_GOT_TPREL16_DS:
13351 case R_PPC64_GOT_TPREL16_LO_DS:
13352 if (tls_mask != 0
13353 && (tls_mask & TLS_TPREL) == 0)
13354 {
13355 toctprel:
13356 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13357 insn &= 31 << 21;
13358 insn |= 0x3c0d0000; /* addis 0,13,0 */
13359 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13360 r_type = R_PPC64_TPREL16_HA;
13361 if (toc_symndx != 0)
13362 {
13363 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13364 rel->r_addend = toc_addend;
13365 /* We changed the symbol. Start over in order to
13366 get h, sym, sec etc. right. */
13367 rel--;
13368 continue;
13369 }
13370 else
13371 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13372 }
13373 break;
13374
13375 case R_PPC64_TLS:
13376 if (tls_mask != 0
13377 && (tls_mask & TLS_TPREL) == 0)
13378 {
13379 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13380 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13381 if (insn == 0)
13382 abort ();
13383 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13384 /* Was PPC64_TLS which sits on insn boundary, now
13385 PPC64_TPREL16_LO which is at low-order half-word. */
13386 rel->r_offset += d_offset;
13387 r_type = R_PPC64_TPREL16_LO;
13388 if (toc_symndx != 0)
13389 {
13390 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13391 rel->r_addend = toc_addend;
13392 /* We changed the symbol. Start over in order to
13393 get h, sym, sec etc. right. */
13394 rel--;
13395 continue;
13396 }
13397 else
13398 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13399 }
13400 break;
13401
13402 case R_PPC64_GOT_TLSGD16_HI:
13403 case R_PPC64_GOT_TLSGD16_HA:
13404 tls_gd = TLS_TPRELGD;
13405 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13406 goto tls_gdld_hi;
13407 break;
13408
13409 case R_PPC64_GOT_TLSLD16_HI:
13410 case R_PPC64_GOT_TLSLD16_HA:
13411 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13412 {
13413 tls_gdld_hi:
13414 if ((tls_mask & tls_gd) != 0)
13415 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13416 + R_PPC64_GOT_TPREL16_DS);
13417 else
13418 {
13419 rel->r_offset -= d_offset;
13420 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13421 r_type = R_PPC64_NONE;
13422 }
13423 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13424 }
13425 break;
13426
13427 case R_PPC64_GOT_TLSGD16:
13428 case R_PPC64_GOT_TLSGD16_LO:
13429 tls_gd = TLS_TPRELGD;
13430 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13431 goto tls_ldgd_opt;
13432 break;
13433
13434 case R_PPC64_GOT_TLSLD16:
13435 case R_PPC64_GOT_TLSLD16_LO:
13436 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13437 {
13438 unsigned int insn1, insn2, insn3;
13439 bfd_vma offset;
13440
13441 tls_ldgd_opt:
13442 offset = (bfd_vma) -1;
13443 /* If not using the newer R_PPC64_TLSGD/LD to mark
13444 __tls_get_addr calls, we must trust that the call
13445 stays with its arg setup insns, ie. that the next
13446 reloc is the __tls_get_addr call associated with
13447 the current reloc. Edit both insns. */
13448 if (input_section->has_tls_get_addr_call
13449 && rel + 1 < relend
13450 && branch_reloc_hash_match (input_bfd, rel + 1,
13451 htab->tls_get_addr,
13452 htab->tls_get_addr_fd))
13453 offset = rel[1].r_offset;
13454 /* We read the low GOT_TLS (or TOC16) insn because we
13455 need to keep the destination reg. It may be
13456 something other than the usual r3, and moved to r3
13457 before the call by intervening code. */
13458 insn1 = bfd_get_32 (output_bfd,
13459 contents + rel->r_offset - d_offset);
13460 if ((tls_mask & tls_gd) != 0)
13461 {
13462 /* IE */
13463 insn1 &= (0x1f << 21) | (0x1f << 16);
13464 insn1 |= 58 << 26; /* ld */
13465 insn2 = 0x7c636a14; /* add 3,3,13 */
13466 if (offset != (bfd_vma) -1)
13467 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13468 if ((tls_mask & TLS_EXPLICIT) == 0)
13469 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13470 + R_PPC64_GOT_TPREL16_DS);
13471 else
13472 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13473 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13474 }
13475 else
13476 {
13477 /* LE */
13478 insn1 &= 0x1f << 21;
13479 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13480 insn2 = 0x38630000; /* addi 3,3,0 */
13481 if (tls_gd == 0)
13482 {
13483 /* Was an LD reloc. */
13484 if (toc_symndx)
13485 sec = local_sections[toc_symndx];
13486 for (r_symndx = 0;
13487 r_symndx < symtab_hdr->sh_info;
13488 r_symndx++)
13489 if (local_sections[r_symndx] == sec)
13490 break;
13491 if (r_symndx >= symtab_hdr->sh_info)
13492 r_symndx = STN_UNDEF;
13493 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13494 if (r_symndx != STN_UNDEF)
13495 rel->r_addend -= (local_syms[r_symndx].st_value
13496 + sec->output_offset
13497 + sec->output_section->vma);
13498 }
13499 else if (toc_symndx != 0)
13500 {
13501 r_symndx = toc_symndx;
13502 rel->r_addend = toc_addend;
13503 }
13504 r_type = R_PPC64_TPREL16_HA;
13505 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13506 if (offset != (bfd_vma) -1)
13507 {
13508 rel[1].r_info = ELF64_R_INFO (r_symndx,
13509 R_PPC64_TPREL16_LO);
13510 rel[1].r_offset = offset + d_offset;
13511 rel[1].r_addend = rel->r_addend;
13512 }
13513 }
13514 bfd_put_32 (output_bfd, insn1,
13515 contents + rel->r_offset - d_offset);
13516 if (offset != (bfd_vma) -1)
13517 {
13518 insn3 = bfd_get_32 (output_bfd,
13519 contents + offset + 4);
13520 if (insn3 == NOP
13521 || insn3 == CROR_151515 || insn3 == CROR_313131)
13522 {
13523 rel[1].r_offset += 4;
13524 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13525 insn2 = NOP;
13526 }
13527 bfd_put_32 (output_bfd, insn2, contents + offset);
13528 }
13529 if ((tls_mask & tls_gd) == 0
13530 && (tls_gd == 0 || toc_symndx != 0))
13531 {
13532 /* We changed the symbol. Start over in order
13533 to get h, sym, sec etc. right. */
13534 rel--;
13535 continue;
13536 }
13537 }
13538 break;
13539
13540 case R_PPC64_TLSGD:
13541 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13542 {
13543 unsigned int insn2, insn3;
13544 bfd_vma offset = rel->r_offset;
13545
13546 if ((tls_mask & TLS_TPRELGD) != 0)
13547 {
13548 /* IE */
13549 r_type = R_PPC64_NONE;
13550 insn2 = 0x7c636a14; /* add 3,3,13 */
13551 }
13552 else
13553 {
13554 /* LE */
13555 if (toc_symndx != 0)
13556 {
13557 r_symndx = toc_symndx;
13558 rel->r_addend = toc_addend;
13559 }
13560 r_type = R_PPC64_TPREL16_LO;
13561 rel->r_offset = offset + d_offset;
13562 insn2 = 0x38630000; /* addi 3,3,0 */
13563 }
13564 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13565 /* Zap the reloc on the _tls_get_addr call too. */
13566 BFD_ASSERT (offset == rel[1].r_offset);
13567 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13568 insn3 = bfd_get_32 (output_bfd,
13569 contents + offset + 4);
13570 if (insn3 == NOP
13571 || insn3 == CROR_151515 || insn3 == CROR_313131)
13572 {
13573 rel->r_offset += 4;
13574 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13575 insn2 = NOP;
13576 }
13577 bfd_put_32 (output_bfd, insn2, contents + offset);
13578 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13579 {
13580 rel--;
13581 continue;
13582 }
13583 }
13584 break;
13585
13586 case R_PPC64_TLSLD:
13587 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13588 {
13589 unsigned int insn2, insn3;
13590 bfd_vma offset = rel->r_offset;
13591
13592 if (toc_symndx)
13593 sec = local_sections[toc_symndx];
13594 for (r_symndx = 0;
13595 r_symndx < symtab_hdr->sh_info;
13596 r_symndx++)
13597 if (local_sections[r_symndx] == sec)
13598 break;
13599 if (r_symndx >= symtab_hdr->sh_info)
13600 r_symndx = STN_UNDEF;
13601 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13602 if (r_symndx != STN_UNDEF)
13603 rel->r_addend -= (local_syms[r_symndx].st_value
13604 + sec->output_offset
13605 + sec->output_section->vma);
13606
13607 r_type = R_PPC64_TPREL16_LO;
13608 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13609 rel->r_offset = offset + d_offset;
13610 /* Zap the reloc on the _tls_get_addr call too. */
13611 BFD_ASSERT (offset == rel[1].r_offset);
13612 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13613 insn2 = 0x38630000; /* addi 3,3,0 */
13614 insn3 = bfd_get_32 (output_bfd,
13615 contents + offset + 4);
13616 if (insn3 == NOP
13617 || insn3 == CROR_151515 || insn3 == CROR_313131)
13618 {
13619 rel->r_offset += 4;
13620 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13621 insn2 = NOP;
13622 }
13623 bfd_put_32 (output_bfd, insn2, contents + offset);
13624 rel--;
13625 continue;
13626 }
13627 break;
13628
13629 case R_PPC64_DTPMOD64:
13630 if (rel + 1 < relend
13631 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13632 && rel[1].r_offset == rel->r_offset + 8)
13633 {
13634 if ((tls_mask & TLS_GD) == 0)
13635 {
13636 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13637 if ((tls_mask & TLS_TPRELGD) != 0)
13638 r_type = R_PPC64_TPREL64;
13639 else
13640 {
13641 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13642 r_type = R_PPC64_NONE;
13643 }
13644 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13645 }
13646 }
13647 else
13648 {
13649 if ((tls_mask & TLS_LD) == 0)
13650 {
13651 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13652 r_type = R_PPC64_NONE;
13653 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13654 }
13655 }
13656 break;
13657
13658 case R_PPC64_TPREL64:
13659 if ((tls_mask & TLS_TPREL) == 0)
13660 {
13661 r_type = R_PPC64_NONE;
13662 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13663 }
13664 break;
13665
13666 case R_PPC64_REL16_HA:
13667 /* If we are generating a non-PIC executable, edit
13668 . 0: addis 2,12,.TOC.-0b@ha
13669 . addi 2,2,.TOC.-0b@l
13670 used by ELFv2 global entry points to set up r2, to
13671 . lis 2,.TOC.@ha
13672 . addi 2,2,.TOC.@l
13673 if .TOC. is in range. */
13674 if (!info->shared
13675 && !info->traditional_format
13676 && h != NULL && &h->elf == htab->elf.hgot
13677 && rel + 1 < relend
13678 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13679 && rel[1].r_offset == rel->r_offset + 4
13680 && rel[1].r_addend == rel->r_addend + 4
13681 && relocation + 0x80008000 <= 0xffffffff)
13682 {
13683 unsigned int insn1, insn2;
13684 bfd_vma offset = rel->r_offset - d_offset;
13685 insn1 = bfd_get_32 (output_bfd, contents + offset);
13686 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13687 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13688 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13689 {
13690 r_type = R_PPC64_ADDR16_HA;
13691 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13692 rel->r_addend -= d_offset;
13693 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13694 rel[1].r_addend -= d_offset + 4;
13695 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13696 }
13697 }
13698 break;
13699 }
13700
13701 /* Handle other relocations that tweak non-addend part of insn. */
13702 insn = 0;
13703 max_br_offset = 1 << 25;
13704 addend = rel->r_addend;
13705 reloc_dest = DEST_NORMAL;
13706 switch (r_type)
13707 {
13708 default:
13709 break;
13710
13711 case R_PPC64_TOCSAVE:
13712 if (relocation + addend == (rel->r_offset
13713 + input_section->output_offset
13714 + input_section->output_section->vma)
13715 && tocsave_find (htab, NO_INSERT,
13716 &local_syms, rel, input_bfd))
13717 {
13718 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13719 if (insn == NOP
13720 || insn == CROR_151515 || insn == CROR_313131)
13721 bfd_put_32 (input_bfd,
13722 STD_R2_0R1 + STK_TOC (htab),
13723 contents + rel->r_offset);
13724 }
13725 break;
13726
13727 /* Branch taken prediction relocations. */
13728 case R_PPC64_ADDR14_BRTAKEN:
13729 case R_PPC64_REL14_BRTAKEN:
13730 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13731 /* Fall thru. */
13732
13733 /* Branch not taken prediction relocations. */
13734 case R_PPC64_ADDR14_BRNTAKEN:
13735 case R_PPC64_REL14_BRNTAKEN:
13736 insn |= bfd_get_32 (output_bfd,
13737 contents + rel->r_offset) & ~(0x01 << 21);
13738 /* Fall thru. */
13739
13740 case R_PPC64_REL14:
13741 max_br_offset = 1 << 15;
13742 /* Fall thru. */
13743
13744 case R_PPC64_REL24:
13745 /* Calls to functions with a different TOC, such as calls to
13746 shared objects, need to alter the TOC pointer. This is
13747 done using a linkage stub. A REL24 branching to these
13748 linkage stubs needs to be followed by a nop, as the nop
13749 will be replaced with an instruction to restore the TOC
13750 base pointer. */
13751 fdh = h;
13752 if (h != NULL
13753 && h->oh != NULL
13754 && h->oh->is_func_descriptor)
13755 fdh = ppc_follow_link (h->oh);
13756 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13757 htab);
13758 if (stub_entry != NULL
13759 && (stub_entry->stub_type == ppc_stub_plt_call
13760 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13761 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13762 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13763 {
13764 bfd_boolean can_plt_call = FALSE;
13765
13766 /* All of these stubs will modify r2, so there must be a
13767 branch and link followed by a nop. The nop is
13768 replaced by an insn to restore r2. */
13769 if (rel->r_offset + 8 <= input_section->size)
13770 {
13771 unsigned long br;
13772
13773 br = bfd_get_32 (input_bfd,
13774 contents + rel->r_offset);
13775 if ((br & 1) != 0)
13776 {
13777 unsigned long nop;
13778
13779 nop = bfd_get_32 (input_bfd,
13780 contents + rel->r_offset + 4);
13781 if (nop == NOP
13782 || nop == CROR_151515 || nop == CROR_313131)
13783 {
13784 if (h != NULL
13785 && (h == htab->tls_get_addr_fd
13786 || h == htab->tls_get_addr)
13787 && !htab->params->no_tls_get_addr_opt)
13788 {
13789 /* Special stub used, leave nop alone. */
13790 }
13791 else
13792 bfd_put_32 (input_bfd,
13793 LD_R2_0R1 + STK_TOC (htab),
13794 contents + rel->r_offset + 4);
13795 can_plt_call = TRUE;
13796 }
13797 }
13798 }
13799
13800 if (!can_plt_call && h != NULL)
13801 {
13802 const char *name = h->elf.root.root.string;
13803
13804 if (*name == '.')
13805 ++name;
13806
13807 if (strncmp (name, "__libc_start_main", 17) == 0
13808 && (name[17] == 0 || name[17] == '@'))
13809 {
13810 /* Allow crt1 branch to go via a toc adjusting
13811 stub. Other calls that never return could do
13812 the same, if we could detect such. */
13813 can_plt_call = TRUE;
13814 }
13815 }
13816
13817 if (!can_plt_call)
13818 {
13819 /* g++ as of 20130507 emits self-calls without a
13820 following nop. This is arguably wrong since we
13821 have conflicting information. On the one hand a
13822 global symbol and on the other a local call
13823 sequence, but don't error for this special case.
13824 It isn't possible to cheaply verify we have
13825 exactly such a call. Allow all calls to the same
13826 section. */
13827 asection *code_sec = sec;
13828
13829 if (get_opd_info (sec) != NULL)
13830 {
13831 bfd_vma off = (relocation + addend
13832 - sec->output_section->vma
13833 - sec->output_offset);
13834
13835 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13836 }
13837 if (code_sec == input_section)
13838 can_plt_call = TRUE;
13839 }
13840
13841 if (!can_plt_call)
13842 {
13843 if (stub_entry->stub_type == ppc_stub_plt_call
13844 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13845 info->callbacks->einfo
13846 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13847 "recompile with -fPIC\n"),
13848 input_bfd, input_section, rel->r_offset, sym_name);
13849 else
13850 info->callbacks->einfo
13851 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13852 "(-mcmodel=small toc adjust stub)\n"),
13853 input_bfd, input_section, rel->r_offset, sym_name);
13854
13855 bfd_set_error (bfd_error_bad_value);
13856 ret = FALSE;
13857 }
13858
13859 if (can_plt_call
13860 && (stub_entry->stub_type == ppc_stub_plt_call
13861 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13862 unresolved_reloc = FALSE;
13863 }
13864
13865 if ((stub_entry == NULL
13866 || stub_entry->stub_type == ppc_stub_long_branch
13867 || stub_entry->stub_type == ppc_stub_plt_branch)
13868 && get_opd_info (sec) != NULL)
13869 {
13870 /* The branch destination is the value of the opd entry. */
13871 bfd_vma off = (relocation + addend
13872 - sec->output_section->vma
13873 - sec->output_offset);
13874 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13875 if (dest != (bfd_vma) -1)
13876 {
13877 relocation = dest;
13878 addend = 0;
13879 reloc_dest = DEST_OPD;
13880 }
13881 }
13882
13883 /* If the branch is out of reach we ought to have a long
13884 branch stub. */
13885 from = (rel->r_offset
13886 + input_section->output_offset
13887 + input_section->output_section->vma);
13888
13889 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13890 ? fdh->elf.other
13891 : sym->st_other);
13892
13893 if (stub_entry != NULL
13894 && (stub_entry->stub_type == ppc_stub_long_branch
13895 || stub_entry->stub_type == ppc_stub_plt_branch)
13896 && (r_type == R_PPC64_ADDR14_BRTAKEN
13897 || r_type == R_PPC64_ADDR14_BRNTAKEN
13898 || (relocation + addend - from + max_br_offset
13899 < 2 * max_br_offset)))
13900 /* Don't use the stub if this branch is in range. */
13901 stub_entry = NULL;
13902
13903 if (stub_entry != NULL)
13904 {
13905 /* Munge up the value and addend so that we call the stub
13906 rather than the procedure directly. */
13907 relocation = (stub_entry->stub_offset
13908 + stub_entry->stub_sec->output_offset
13909 + stub_entry->stub_sec->output_section->vma);
13910 addend = 0;
13911 reloc_dest = DEST_STUB;
13912
13913 if ((stub_entry->stub_type == ppc_stub_plt_call
13914 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13915 && (ALWAYS_EMIT_R2SAVE
13916 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13917 && rel + 1 < relend
13918 && rel[1].r_offset == rel->r_offset + 4
13919 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13920 relocation += 4;
13921 }
13922
13923 if (insn != 0)
13924 {
13925 if (is_isa_v2)
13926 {
13927 /* Set 'a' bit. This is 0b00010 in BO field for branch
13928 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13929 for branch on CTR insns (BO == 1a00t or 1a01t). */
13930 if ((insn & (0x14 << 21)) == (0x04 << 21))
13931 insn |= 0x02 << 21;
13932 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13933 insn |= 0x08 << 21;
13934 else
13935 break;
13936 }
13937 else
13938 {
13939 /* Invert 'y' bit if not the default. */
13940 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13941 insn ^= 0x01 << 21;
13942 }
13943
13944 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13945 }
13946
13947 /* NOP out calls to undefined weak functions.
13948 We can thus call a weak function without first
13949 checking whether the function is defined. */
13950 else if (h != NULL
13951 && h->elf.root.type == bfd_link_hash_undefweak
13952 && h->elf.dynindx == -1
13953 && r_type == R_PPC64_REL24
13954 && relocation == 0
13955 && addend == 0)
13956 {
13957 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13958 continue;
13959 }
13960 break;
13961 }
13962
13963 /* Set `addend'. */
13964 tls_type = 0;
13965 switch (r_type)
13966 {
13967 default:
13968 info->callbacks->einfo
13969 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13970 input_bfd, (int) r_type, sym_name);
13971
13972 bfd_set_error (bfd_error_bad_value);
13973 ret = FALSE;
13974 continue;
13975
13976 case R_PPC64_NONE:
13977 case R_PPC64_TLS:
13978 case R_PPC64_TLSGD:
13979 case R_PPC64_TLSLD:
13980 case R_PPC64_TOCSAVE:
13981 case R_PPC64_GNU_VTINHERIT:
13982 case R_PPC64_GNU_VTENTRY:
13983 continue;
13984
13985 /* GOT16 relocations. Like an ADDR16 using the symbol's
13986 address in the GOT as relocation value instead of the
13987 symbol's value itself. Also, create a GOT entry for the
13988 symbol and put the symbol value there. */
13989 case R_PPC64_GOT_TLSGD16:
13990 case R_PPC64_GOT_TLSGD16_LO:
13991 case R_PPC64_GOT_TLSGD16_HI:
13992 case R_PPC64_GOT_TLSGD16_HA:
13993 tls_type = TLS_TLS | TLS_GD;
13994 goto dogot;
13995
13996 case R_PPC64_GOT_TLSLD16:
13997 case R_PPC64_GOT_TLSLD16_LO:
13998 case R_PPC64_GOT_TLSLD16_HI:
13999 case R_PPC64_GOT_TLSLD16_HA:
14000 tls_type = TLS_TLS | TLS_LD;
14001 goto dogot;
14002
14003 case R_PPC64_GOT_TPREL16_DS:
14004 case R_PPC64_GOT_TPREL16_LO_DS:
14005 case R_PPC64_GOT_TPREL16_HI:
14006 case R_PPC64_GOT_TPREL16_HA:
14007 tls_type = TLS_TLS | TLS_TPREL;
14008 goto dogot;
14009
14010 case R_PPC64_GOT_DTPREL16_DS:
14011 case R_PPC64_GOT_DTPREL16_LO_DS:
14012 case R_PPC64_GOT_DTPREL16_HI:
14013 case R_PPC64_GOT_DTPREL16_HA:
14014 tls_type = TLS_TLS | TLS_DTPREL;
14015 goto dogot;
14016
14017 case R_PPC64_GOT16:
14018 case R_PPC64_GOT16_LO:
14019 case R_PPC64_GOT16_HI:
14020 case R_PPC64_GOT16_HA:
14021 case R_PPC64_GOT16_DS:
14022 case R_PPC64_GOT16_LO_DS:
14023 dogot:
14024 {
14025 /* Relocation is to the entry for this symbol in the global
14026 offset table. */
14027 asection *got;
14028 bfd_vma *offp;
14029 bfd_vma off;
14030 unsigned long indx = 0;
14031 struct got_entry *ent;
14032
14033 if (tls_type == (TLS_TLS | TLS_LD)
14034 && (h == NULL
14035 || !h->elf.def_dynamic))
14036 ent = ppc64_tlsld_got (input_bfd);
14037 else
14038 {
14039
14040 if (h != NULL)
14041 {
14042 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14043 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
14044 &h->elf)
14045 || (info->shared
14046 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14047 /* This is actually a static link, or it is a
14048 -Bsymbolic link and the symbol is defined
14049 locally, or the symbol was forced to be local
14050 because of a version file. */
14051 ;
14052 else
14053 {
14054 BFD_ASSERT (h->elf.dynindx != -1);
14055 indx = h->elf.dynindx;
14056 unresolved_reloc = FALSE;
14057 }
14058 ent = h->elf.got.glist;
14059 }
14060 else
14061 {
14062 if (local_got_ents == NULL)
14063 abort ();
14064 ent = local_got_ents[r_symndx];
14065 }
14066
14067 for (; ent != NULL; ent = ent->next)
14068 if (ent->addend == orig_rel.r_addend
14069 && ent->owner == input_bfd
14070 && ent->tls_type == tls_type)
14071 break;
14072 }
14073
14074 if (ent == NULL)
14075 abort ();
14076 if (ent->is_indirect)
14077 ent = ent->got.ent;
14078 offp = &ent->got.offset;
14079 got = ppc64_elf_tdata (ent->owner)->got;
14080 if (got == NULL)
14081 abort ();
14082
14083 /* The offset must always be a multiple of 8. We use the
14084 least significant bit to record whether we have already
14085 processed this entry. */
14086 off = *offp;
14087 if ((off & 1) != 0)
14088 off &= ~1;
14089 else
14090 {
14091 /* Generate relocs for the dynamic linker, except in
14092 the case of TLSLD where we'll use one entry per
14093 module. */
14094 asection *relgot;
14095 bfd_boolean ifunc;
14096
14097 *offp = off | 1;
14098 relgot = NULL;
14099 ifunc = (h != NULL
14100 ? h->elf.type == STT_GNU_IFUNC
14101 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14102 if (ifunc)
14103 relgot = htab->elf.irelplt;
14104 else if ((info->shared || indx != 0)
14105 && (h == NULL
14106 || (tls_type == (TLS_TLS | TLS_LD)
14107 && !h->elf.def_dynamic)
14108 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14109 || h->elf.root.type != bfd_link_hash_undefweak))
14110 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14111 if (relgot != NULL)
14112 {
14113 outrel.r_offset = (got->output_section->vma
14114 + got->output_offset
14115 + off);
14116 outrel.r_addend = addend;
14117 if (tls_type & (TLS_LD | TLS_GD))
14118 {
14119 outrel.r_addend = 0;
14120 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14121 if (tls_type == (TLS_TLS | TLS_GD))
14122 {
14123 loc = relgot->contents;
14124 loc += (relgot->reloc_count++
14125 * sizeof (Elf64_External_Rela));
14126 bfd_elf64_swap_reloca_out (output_bfd,
14127 &outrel, loc);
14128 outrel.r_offset += 8;
14129 outrel.r_addend = addend;
14130 outrel.r_info
14131 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14132 }
14133 }
14134 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14135 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14136 else if (tls_type == (TLS_TLS | TLS_TPREL))
14137 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14138 else if (indx != 0)
14139 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14140 else
14141 {
14142 if (ifunc)
14143 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14144 else
14145 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14146
14147 /* Write the .got section contents for the sake
14148 of prelink. */
14149 loc = got->contents + off;
14150 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14151 loc);
14152 }
14153
14154 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14155 {
14156 outrel.r_addend += relocation;
14157 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14158 {
14159 if (htab->elf.tls_sec == NULL)
14160 outrel.r_addend = 0;
14161 else
14162 outrel.r_addend -= htab->elf.tls_sec->vma;
14163 }
14164 }
14165 loc = relgot->contents;
14166 loc += (relgot->reloc_count++
14167 * sizeof (Elf64_External_Rela));
14168 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14169 }
14170
14171 /* Init the .got section contents here if we're not
14172 emitting a reloc. */
14173 else
14174 {
14175 relocation += addend;
14176 if (tls_type == (TLS_TLS | TLS_LD))
14177 relocation = 1;
14178 else if (tls_type != 0)
14179 {
14180 if (htab->elf.tls_sec == NULL)
14181 relocation = 0;
14182 else
14183 {
14184 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14185 if (tls_type == (TLS_TLS | TLS_TPREL))
14186 relocation += DTP_OFFSET - TP_OFFSET;
14187 }
14188
14189 if (tls_type == (TLS_TLS | TLS_GD))
14190 {
14191 bfd_put_64 (output_bfd, relocation,
14192 got->contents + off + 8);
14193 relocation = 1;
14194 }
14195 }
14196
14197 bfd_put_64 (output_bfd, relocation,
14198 got->contents + off);
14199 }
14200 }
14201
14202 if (off >= (bfd_vma) -2)
14203 abort ();
14204
14205 relocation = got->output_section->vma + got->output_offset + off;
14206 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14207 }
14208 break;
14209
14210 case R_PPC64_PLT16_HA:
14211 case R_PPC64_PLT16_HI:
14212 case R_PPC64_PLT16_LO:
14213 case R_PPC64_PLT32:
14214 case R_PPC64_PLT64:
14215 /* Relocation is to the entry for this symbol in the
14216 procedure linkage table. */
14217
14218 /* Resolve a PLT reloc against a local symbol directly,
14219 without using the procedure linkage table. */
14220 if (h == NULL)
14221 break;
14222
14223 /* It's possible that we didn't make a PLT entry for this
14224 symbol. This happens when statically linking PIC code,
14225 or when using -Bsymbolic. Go find a match if there is a
14226 PLT entry. */
14227 if (htab->elf.splt != NULL)
14228 {
14229 struct plt_entry *ent;
14230 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14231 if (ent->plt.offset != (bfd_vma) -1
14232 && ent->addend == orig_rel.r_addend)
14233 {
14234 relocation = (htab->elf.splt->output_section->vma
14235 + htab->elf.splt->output_offset
14236 + ent->plt.offset);
14237 unresolved_reloc = FALSE;
14238 break;
14239 }
14240 }
14241 break;
14242
14243 case R_PPC64_TOC:
14244 /* Relocation value is TOC base. */
14245 relocation = TOCstart;
14246 if (r_symndx == STN_UNDEF)
14247 relocation += htab->stub_group[input_section->id].toc_off;
14248 else if (unresolved_reloc)
14249 ;
14250 else if (sec != NULL && sec->id <= htab->top_id)
14251 relocation += htab->stub_group[sec->id].toc_off;
14252 else
14253 unresolved_reloc = TRUE;
14254 goto dodyn;
14255
14256 /* TOC16 relocs. We want the offset relative to the TOC base,
14257 which is the address of the start of the TOC plus 0x8000.
14258 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14259 in this order. */
14260 case R_PPC64_TOC16:
14261 case R_PPC64_TOC16_LO:
14262 case R_PPC64_TOC16_HI:
14263 case R_PPC64_TOC16_DS:
14264 case R_PPC64_TOC16_LO_DS:
14265 case R_PPC64_TOC16_HA:
14266 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14267 break;
14268
14269 /* Relocate against the beginning of the section. */
14270 case R_PPC64_SECTOFF:
14271 case R_PPC64_SECTOFF_LO:
14272 case R_PPC64_SECTOFF_HI:
14273 case R_PPC64_SECTOFF_DS:
14274 case R_PPC64_SECTOFF_LO_DS:
14275 case R_PPC64_SECTOFF_HA:
14276 if (sec != NULL)
14277 addend -= sec->output_section->vma;
14278 break;
14279
14280 case R_PPC64_REL16:
14281 case R_PPC64_REL16_LO:
14282 case R_PPC64_REL16_HI:
14283 case R_PPC64_REL16_HA:
14284 break;
14285
14286 case R_PPC64_REL14:
14287 case R_PPC64_REL14_BRNTAKEN:
14288 case R_PPC64_REL14_BRTAKEN:
14289 case R_PPC64_REL24:
14290 break;
14291
14292 case R_PPC64_TPREL16:
14293 case R_PPC64_TPREL16_LO:
14294 case R_PPC64_TPREL16_HI:
14295 case R_PPC64_TPREL16_HA:
14296 case R_PPC64_TPREL16_DS:
14297 case R_PPC64_TPREL16_LO_DS:
14298 case R_PPC64_TPREL16_HIGH:
14299 case R_PPC64_TPREL16_HIGHA:
14300 case R_PPC64_TPREL16_HIGHER:
14301 case R_PPC64_TPREL16_HIGHERA:
14302 case R_PPC64_TPREL16_HIGHEST:
14303 case R_PPC64_TPREL16_HIGHESTA:
14304 if (h != NULL
14305 && h->elf.root.type == bfd_link_hash_undefweak
14306 && h->elf.dynindx == -1)
14307 {
14308 /* Make this relocation against an undefined weak symbol
14309 resolve to zero. This is really just a tweak, since
14310 code using weak externs ought to check that they are
14311 defined before using them. */
14312 bfd_byte *p = contents + rel->r_offset - d_offset;
14313
14314 insn = bfd_get_32 (output_bfd, p);
14315 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14316 if (insn != 0)
14317 bfd_put_32 (output_bfd, insn, p);
14318 break;
14319 }
14320 if (htab->elf.tls_sec != NULL)
14321 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14322 if (info->shared)
14323 /* The TPREL16 relocs shouldn't really be used in shared
14324 libs as they will result in DT_TEXTREL being set, but
14325 support them anyway. */
14326 goto dodyn;
14327 break;
14328
14329 case R_PPC64_DTPREL16:
14330 case R_PPC64_DTPREL16_LO:
14331 case R_PPC64_DTPREL16_HI:
14332 case R_PPC64_DTPREL16_HA:
14333 case R_PPC64_DTPREL16_DS:
14334 case R_PPC64_DTPREL16_LO_DS:
14335 case R_PPC64_DTPREL16_HIGH:
14336 case R_PPC64_DTPREL16_HIGHA:
14337 case R_PPC64_DTPREL16_HIGHER:
14338 case R_PPC64_DTPREL16_HIGHERA:
14339 case R_PPC64_DTPREL16_HIGHEST:
14340 case R_PPC64_DTPREL16_HIGHESTA:
14341 if (htab->elf.tls_sec != NULL)
14342 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14343 break;
14344
14345 case R_PPC64_ADDR64_LOCAL:
14346 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14347 ? h->elf.other
14348 : sym->st_other);
14349 break;
14350
14351 case R_PPC64_DTPMOD64:
14352 relocation = 1;
14353 addend = 0;
14354 goto dodyn;
14355
14356 case R_PPC64_TPREL64:
14357 if (htab->elf.tls_sec != NULL)
14358 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14359 goto dodyn;
14360
14361 case R_PPC64_DTPREL64:
14362 if (htab->elf.tls_sec != NULL)
14363 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14364 /* Fall thru */
14365
14366 /* Relocations that may need to be propagated if this is a
14367 dynamic object. */
14368 case R_PPC64_REL30:
14369 case R_PPC64_REL32:
14370 case R_PPC64_REL64:
14371 case R_PPC64_ADDR14:
14372 case R_PPC64_ADDR14_BRNTAKEN:
14373 case R_PPC64_ADDR14_BRTAKEN:
14374 case R_PPC64_ADDR16:
14375 case R_PPC64_ADDR16_DS:
14376 case R_PPC64_ADDR16_HA:
14377 case R_PPC64_ADDR16_HI:
14378 case R_PPC64_ADDR16_HIGH:
14379 case R_PPC64_ADDR16_HIGHA:
14380 case R_PPC64_ADDR16_HIGHER:
14381 case R_PPC64_ADDR16_HIGHERA:
14382 case R_PPC64_ADDR16_HIGHEST:
14383 case R_PPC64_ADDR16_HIGHESTA:
14384 case R_PPC64_ADDR16_LO:
14385 case R_PPC64_ADDR16_LO_DS:
14386 case R_PPC64_ADDR24:
14387 case R_PPC64_ADDR32:
14388 case R_PPC64_ADDR64:
14389 case R_PPC64_UADDR16:
14390 case R_PPC64_UADDR32:
14391 case R_PPC64_UADDR64:
14392 dodyn:
14393 if ((input_section->flags & SEC_ALLOC) == 0)
14394 break;
14395
14396 if (NO_OPD_RELOCS && is_opd)
14397 break;
14398
14399 if ((info->shared
14400 && (h == NULL
14401 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14402 || h->elf.root.type != bfd_link_hash_undefweak)
14403 && (must_be_dyn_reloc (info, r_type)
14404 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14405 || (ELIMINATE_COPY_RELOCS
14406 && !info->shared
14407 && h != NULL
14408 && h->elf.dynindx != -1
14409 && !h->elf.non_got_ref
14410 && !h->elf.def_regular)
14411 || (!info->shared
14412 && (h != NULL
14413 ? h->elf.type == STT_GNU_IFUNC
14414 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14415 {
14416 bfd_boolean skip, relocate;
14417 asection *sreloc;
14418 bfd_vma out_off;
14419
14420 /* When generating a dynamic object, these relocations
14421 are copied into the output file to be resolved at run
14422 time. */
14423
14424 skip = FALSE;
14425 relocate = FALSE;
14426
14427 out_off = _bfd_elf_section_offset (output_bfd, info,
14428 input_section, rel->r_offset);
14429 if (out_off == (bfd_vma) -1)
14430 skip = TRUE;
14431 else if (out_off == (bfd_vma) -2)
14432 skip = TRUE, relocate = TRUE;
14433 out_off += (input_section->output_section->vma
14434 + input_section->output_offset);
14435 outrel.r_offset = out_off;
14436 outrel.r_addend = rel->r_addend;
14437
14438 /* Optimize unaligned reloc use. */
14439 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14440 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14441 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14442 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14443 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14444 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14445 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14446 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14447 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14448
14449 if (skip)
14450 memset (&outrel, 0, sizeof outrel);
14451 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14452 && !is_opd
14453 && r_type != R_PPC64_TOC)
14454 {
14455 BFD_ASSERT (h->elf.dynindx != -1);
14456 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14457 }
14458 else
14459 {
14460 /* This symbol is local, or marked to become local,
14461 or this is an opd section reloc which must point
14462 at a local function. */
14463 outrel.r_addend += relocation;
14464 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14465 {
14466 if (is_opd && h != NULL)
14467 {
14468 /* Lie about opd entries. This case occurs
14469 when building shared libraries and we
14470 reference a function in another shared
14471 lib. The same thing happens for a weak
14472 definition in an application that's
14473 overridden by a strong definition in a
14474 shared lib. (I believe this is a generic
14475 bug in binutils handling of weak syms.)
14476 In these cases we won't use the opd
14477 entry in this lib. */
14478 unresolved_reloc = FALSE;
14479 }
14480 if (!is_opd
14481 && r_type == R_PPC64_ADDR64
14482 && (h != NULL
14483 ? h->elf.type == STT_GNU_IFUNC
14484 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14485 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14486 else
14487 {
14488 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14489
14490 /* We need to relocate .opd contents for ld.so.
14491 Prelink also wants simple and consistent rules
14492 for relocs. This make all RELATIVE relocs have
14493 *r_offset equal to r_addend. */
14494 relocate = TRUE;
14495 }
14496 }
14497 else
14498 {
14499 long indx = 0;
14500
14501 if (h != NULL
14502 ? h->elf.type == STT_GNU_IFUNC
14503 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14504 {
14505 info->callbacks->einfo
14506 (_("%P: %H: %s for indirect "
14507 "function `%T' unsupported\n"),
14508 input_bfd, input_section, rel->r_offset,
14509 ppc64_elf_howto_table[r_type]->name,
14510 sym_name);
14511 ret = FALSE;
14512 }
14513 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14514 ;
14515 else if (sec == NULL || sec->owner == NULL)
14516 {
14517 bfd_set_error (bfd_error_bad_value);
14518 return FALSE;
14519 }
14520 else
14521 {
14522 asection *osec;
14523
14524 osec = sec->output_section;
14525 indx = elf_section_data (osec)->dynindx;
14526
14527 if (indx == 0)
14528 {
14529 if ((osec->flags & SEC_READONLY) == 0
14530 && htab->elf.data_index_section != NULL)
14531 osec = htab->elf.data_index_section;
14532 else
14533 osec = htab->elf.text_index_section;
14534 indx = elf_section_data (osec)->dynindx;
14535 }
14536 BFD_ASSERT (indx != 0);
14537
14538 /* We are turning this relocation into one
14539 against a section symbol, so subtract out
14540 the output section's address but not the
14541 offset of the input section in the output
14542 section. */
14543 outrel.r_addend -= osec->vma;
14544 }
14545
14546 outrel.r_info = ELF64_R_INFO (indx, r_type);
14547 }
14548 }
14549
14550 sreloc = elf_section_data (input_section)->sreloc;
14551 if (h != NULL
14552 ? h->elf.type == STT_GNU_IFUNC
14553 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14554 sreloc = htab->elf.irelplt;
14555 if (sreloc == NULL)
14556 abort ();
14557
14558 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14559 >= sreloc->size)
14560 abort ();
14561 loc = sreloc->contents;
14562 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14563 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14564
14565 /* If this reloc is against an external symbol, it will
14566 be computed at runtime, so there's no need to do
14567 anything now. However, for the sake of prelink ensure
14568 that the section contents are a known value. */
14569 if (! relocate)
14570 {
14571 unresolved_reloc = FALSE;
14572 /* The value chosen here is quite arbitrary as ld.so
14573 ignores section contents except for the special
14574 case of .opd where the contents might be accessed
14575 before relocation. Choose zero, as that won't
14576 cause reloc overflow. */
14577 relocation = 0;
14578 addend = 0;
14579 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14580 to improve backward compatibility with older
14581 versions of ld. */
14582 if (r_type == R_PPC64_ADDR64)
14583 addend = outrel.r_addend;
14584 /* Adjust pc_relative relocs to have zero in *r_offset. */
14585 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14586 addend = (input_section->output_section->vma
14587 + input_section->output_offset
14588 + rel->r_offset);
14589 }
14590 }
14591 break;
14592
14593 case R_PPC64_COPY:
14594 case R_PPC64_GLOB_DAT:
14595 case R_PPC64_JMP_SLOT:
14596 case R_PPC64_JMP_IREL:
14597 case R_PPC64_RELATIVE:
14598 /* We shouldn't ever see these dynamic relocs in relocatable
14599 files. */
14600 /* Fall through. */
14601
14602 case R_PPC64_PLTGOT16:
14603 case R_PPC64_PLTGOT16_DS:
14604 case R_PPC64_PLTGOT16_HA:
14605 case R_PPC64_PLTGOT16_HI:
14606 case R_PPC64_PLTGOT16_LO:
14607 case R_PPC64_PLTGOT16_LO_DS:
14608 case R_PPC64_PLTREL32:
14609 case R_PPC64_PLTREL64:
14610 /* These ones haven't been implemented yet. */
14611
14612 info->callbacks->einfo
14613 (_("%P: %B: %s is not supported for `%T'\n"),
14614 input_bfd,
14615 ppc64_elf_howto_table[r_type]->name, sym_name);
14616
14617 bfd_set_error (bfd_error_invalid_operation);
14618 ret = FALSE;
14619 continue;
14620 }
14621
14622 /* Multi-instruction sequences that access the TOC can be
14623 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14624 to nop; addi rb,r2,x; */
14625 switch (r_type)
14626 {
14627 default:
14628 break;
14629
14630 case R_PPC64_GOT_TLSLD16_HI:
14631 case R_PPC64_GOT_TLSGD16_HI:
14632 case R_PPC64_GOT_TPREL16_HI:
14633 case R_PPC64_GOT_DTPREL16_HI:
14634 case R_PPC64_GOT16_HI:
14635 case R_PPC64_TOC16_HI:
14636 /* These relocs would only be useful if building up an
14637 offset to later add to r2, perhaps in an indexed
14638 addressing mode instruction. Don't try to optimize.
14639 Unfortunately, the possibility of someone building up an
14640 offset like this or even with the HA relocs, means that
14641 we need to check the high insn when optimizing the low
14642 insn. */
14643 break;
14644
14645 case R_PPC64_GOT_TLSLD16_HA:
14646 case R_PPC64_GOT_TLSGD16_HA:
14647 case R_PPC64_GOT_TPREL16_HA:
14648 case R_PPC64_GOT_DTPREL16_HA:
14649 case R_PPC64_GOT16_HA:
14650 case R_PPC64_TOC16_HA:
14651 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14652 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14653 {
14654 bfd_byte *p = contents + (rel->r_offset & ~3);
14655 bfd_put_32 (input_bfd, NOP, p);
14656 }
14657 break;
14658
14659 case R_PPC64_GOT_TLSLD16_LO:
14660 case R_PPC64_GOT_TLSGD16_LO:
14661 case R_PPC64_GOT_TPREL16_LO_DS:
14662 case R_PPC64_GOT_DTPREL16_LO_DS:
14663 case R_PPC64_GOT16_LO:
14664 case R_PPC64_GOT16_LO_DS:
14665 case R_PPC64_TOC16_LO:
14666 case R_PPC64_TOC16_LO_DS:
14667 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14668 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14669 {
14670 bfd_byte *p = contents + (rel->r_offset & ~3);
14671 insn = bfd_get_32 (input_bfd, p);
14672 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14673 {
14674 /* Transform addic to addi when we change reg. */
14675 insn &= ~((0x3f << 26) | (0x1f << 16));
14676 insn |= (14u << 26) | (2 << 16);
14677 }
14678 else
14679 {
14680 insn &= ~(0x1f << 16);
14681 insn |= 2 << 16;
14682 }
14683 bfd_put_32 (input_bfd, insn, p);
14684 }
14685 break;
14686 }
14687
14688 /* Do any further special processing. */
14689 howto = ppc64_elf_howto_table[(int) r_type];
14690 switch (r_type)
14691 {
14692 default:
14693 break;
14694
14695 case R_PPC64_REL16_HA:
14696 case R_PPC64_ADDR16_HA:
14697 case R_PPC64_ADDR16_HIGHA:
14698 case R_PPC64_ADDR16_HIGHERA:
14699 case R_PPC64_ADDR16_HIGHESTA:
14700 case R_PPC64_TOC16_HA:
14701 case R_PPC64_SECTOFF_HA:
14702 case R_PPC64_TPREL16_HA:
14703 case R_PPC64_TPREL16_HIGHA:
14704 case R_PPC64_TPREL16_HIGHERA:
14705 case R_PPC64_TPREL16_HIGHESTA:
14706 case R_PPC64_DTPREL16_HA:
14707 case R_PPC64_DTPREL16_HIGHA:
14708 case R_PPC64_DTPREL16_HIGHERA:
14709 case R_PPC64_DTPREL16_HIGHESTA:
14710 /* It's just possible that this symbol is a weak symbol
14711 that's not actually defined anywhere. In that case,
14712 'sec' would be NULL, and we should leave the symbol
14713 alone (it will be set to zero elsewhere in the link). */
14714 if (sec == NULL)
14715 break;
14716 /* Fall thru */
14717
14718 case R_PPC64_GOT16_HA:
14719 case R_PPC64_PLTGOT16_HA:
14720 case R_PPC64_PLT16_HA:
14721 case R_PPC64_GOT_TLSGD16_HA:
14722 case R_PPC64_GOT_TLSLD16_HA:
14723 case R_PPC64_GOT_TPREL16_HA:
14724 case R_PPC64_GOT_DTPREL16_HA:
14725 /* Add 0x10000 if sign bit in 0:15 is set.
14726 Bits 0:15 are not used. */
14727 addend += 0x8000;
14728 break;
14729
14730 case R_PPC64_ADDR16_DS:
14731 case R_PPC64_ADDR16_LO_DS:
14732 case R_PPC64_GOT16_DS:
14733 case R_PPC64_GOT16_LO_DS:
14734 case R_PPC64_PLT16_LO_DS:
14735 case R_PPC64_SECTOFF_DS:
14736 case R_PPC64_SECTOFF_LO_DS:
14737 case R_PPC64_TOC16_DS:
14738 case R_PPC64_TOC16_LO_DS:
14739 case R_PPC64_PLTGOT16_DS:
14740 case R_PPC64_PLTGOT16_LO_DS:
14741 case R_PPC64_GOT_TPREL16_DS:
14742 case R_PPC64_GOT_TPREL16_LO_DS:
14743 case R_PPC64_GOT_DTPREL16_DS:
14744 case R_PPC64_GOT_DTPREL16_LO_DS:
14745 case R_PPC64_TPREL16_DS:
14746 case R_PPC64_TPREL16_LO_DS:
14747 case R_PPC64_DTPREL16_DS:
14748 case R_PPC64_DTPREL16_LO_DS:
14749 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14750 mask = 3;
14751 /* If this reloc is against an lq insn, then the value must be
14752 a multiple of 16. This is somewhat of a hack, but the
14753 "correct" way to do this by defining _DQ forms of all the
14754 _DS relocs bloats all reloc switches in this file. It
14755 doesn't seem to make much sense to use any of these relocs
14756 in data, so testing the insn should be safe. */
14757 if ((insn & (0x3f << 26)) == (56u << 26))
14758 mask = 15;
14759 if (((relocation + addend) & mask) != 0)
14760 {
14761 info->callbacks->einfo
14762 (_("%P: %H: error: %s not a multiple of %u\n"),
14763 input_bfd, input_section, rel->r_offset,
14764 howto->name,
14765 mask + 1);
14766 bfd_set_error (bfd_error_bad_value);
14767 ret = FALSE;
14768 continue;
14769 }
14770 break;
14771 }
14772
14773 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14774 because such sections are not SEC_ALLOC and thus ld.so will
14775 not process them. */
14776 if (unresolved_reloc
14777 && !((input_section->flags & SEC_DEBUGGING) != 0
14778 && h->elf.def_dynamic)
14779 && _bfd_elf_section_offset (output_bfd, info, input_section,
14780 rel->r_offset) != (bfd_vma) -1)
14781 {
14782 info->callbacks->einfo
14783 (_("%P: %H: unresolvable %s against `%T'\n"),
14784 input_bfd, input_section, rel->r_offset,
14785 howto->name,
14786 h->elf.root.root.string);
14787 ret = FALSE;
14788 }
14789
14790 /* 16-bit fields in insns mostly have signed values, but a
14791 few insns have 16-bit unsigned values. Really, we should
14792 have different reloc types. */
14793 if (howto->complain_on_overflow != complain_overflow_dont
14794 && howto->dst_mask == 0xffff
14795 && (input_section->flags & SEC_CODE) != 0)
14796 {
14797 enum complain_overflow complain = complain_overflow_signed;
14798
14799 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14800 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14801 complain = complain_overflow_bitfield;
14802 else if (howto->rightshift == 0
14803 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14804 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14805 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
14806 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14807 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14808 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14809 complain = complain_overflow_unsigned;
14810 if (howto->complain_on_overflow != complain)
14811 {
14812 alt_howto = *howto;
14813 alt_howto.complain_on_overflow = complain;
14814 howto = &alt_howto;
14815 }
14816 }
14817
14818 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14819 rel->r_offset, relocation, addend);
14820
14821 if (r != bfd_reloc_ok)
14822 {
14823 char *more_info = NULL;
14824 const char *reloc_name = howto->name;
14825
14826 if (reloc_dest != DEST_NORMAL)
14827 {
14828 more_info = bfd_malloc (strlen (reloc_name) + 8);
14829 if (more_info != NULL)
14830 {
14831 strcpy (more_info, reloc_name);
14832 strcat (more_info, (reloc_dest == DEST_OPD
14833 ? " (OPD)" : " (stub)"));
14834 reloc_name = more_info;
14835 }
14836 }
14837
14838 if (r == bfd_reloc_overflow)
14839 {
14840 if (warned)
14841 continue;
14842 if (h != NULL
14843 && h->elf.root.type == bfd_link_hash_undefweak
14844 && howto->pc_relative)
14845 {
14846 /* Assume this is a call protected by other code that
14847 detects the symbol is undefined. If this is the case,
14848 we can safely ignore the overflow. If not, the
14849 program is hosed anyway, and a little warning isn't
14850 going to help. */
14851
14852 continue;
14853 }
14854
14855 if (!((*info->callbacks->reloc_overflow)
14856 (info, &h->elf.root, sym_name,
14857 reloc_name, orig_rel.r_addend,
14858 input_bfd, input_section, rel->r_offset)))
14859 return FALSE;
14860 }
14861 else
14862 {
14863 info->callbacks->einfo
14864 (_("%P: %H: %s against `%T': error %d\n"),
14865 input_bfd, input_section, rel->r_offset,
14866 reloc_name, sym_name, (int) r);
14867 ret = FALSE;
14868 }
14869 if (more_info != NULL)
14870 free (more_info);
14871 }
14872 }
14873
14874 /* If we're emitting relocations, then shortly after this function
14875 returns, reloc offsets and addends for this section will be
14876 adjusted. Worse, reloc symbol indices will be for the output
14877 file rather than the input. Save a copy of the relocs for
14878 opd_entry_value. */
14879 if (is_opd && (info->emitrelocations || info->relocatable))
14880 {
14881 bfd_size_type amt;
14882 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14883 rel = bfd_alloc (input_bfd, amt);
14884 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14885 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14886 if (rel == NULL)
14887 return FALSE;
14888 memcpy (rel, relocs, amt);
14889 }
14890 return ret;
14891 }
14892
14893 /* Adjust the value of any local symbols in opd sections. */
14894
14895 static int
14896 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14897 const char *name ATTRIBUTE_UNUSED,
14898 Elf_Internal_Sym *elfsym,
14899 asection *input_sec,
14900 struct elf_link_hash_entry *h)
14901 {
14902 struct _opd_sec_data *opd;
14903 long adjust;
14904 bfd_vma value;
14905
14906 if (h != NULL)
14907 return 1;
14908
14909 opd = get_opd_info (input_sec);
14910 if (opd == NULL || opd->adjust == NULL)
14911 return 1;
14912
14913 value = elfsym->st_value - input_sec->output_offset;
14914 if (!info->relocatable)
14915 value -= input_sec->output_section->vma;
14916
14917 adjust = opd->adjust[OPD_NDX (value)];
14918 if (adjust == -1)
14919 return 2;
14920
14921 elfsym->st_value += adjust;
14922 return 1;
14923 }
14924
14925 /* Finish up dynamic symbol handling. We set the contents of various
14926 dynamic sections here. */
14927
14928 static bfd_boolean
14929 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14930 struct bfd_link_info *info,
14931 struct elf_link_hash_entry *h,
14932 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14933 {
14934 struct ppc_link_hash_table *htab;
14935 struct plt_entry *ent;
14936 Elf_Internal_Rela rela;
14937 bfd_byte *loc;
14938
14939 htab = ppc_hash_table (info);
14940 if (htab == NULL)
14941 return FALSE;
14942
14943 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14944 if (ent->plt.offset != (bfd_vma) -1)
14945 {
14946 /* This symbol has an entry in the procedure linkage
14947 table. Set it up. */
14948 if (!htab->elf.dynamic_sections_created
14949 || h->dynindx == -1)
14950 {
14951 BFD_ASSERT (h->type == STT_GNU_IFUNC
14952 && h->def_regular
14953 && (h->root.type == bfd_link_hash_defined
14954 || h->root.type == bfd_link_hash_defweak));
14955 rela.r_offset = (htab->elf.iplt->output_section->vma
14956 + htab->elf.iplt->output_offset
14957 + ent->plt.offset);
14958 if (htab->opd_abi)
14959 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14960 else
14961 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14962 rela.r_addend = (h->root.u.def.value
14963 + h->root.u.def.section->output_offset
14964 + h->root.u.def.section->output_section->vma
14965 + ent->addend);
14966 loc = (htab->elf.irelplt->contents
14967 + (htab->elf.irelplt->reloc_count++
14968 * sizeof (Elf64_External_Rela)));
14969 }
14970 else
14971 {
14972 rela.r_offset = (htab->elf.splt->output_section->vma
14973 + htab->elf.splt->output_offset
14974 + ent->plt.offset);
14975 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14976 rela.r_addend = ent->addend;
14977 loc = (htab->elf.srelplt->contents
14978 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14979 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14980 }
14981 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14982
14983 if (!htab->opd_abi)
14984 {
14985 if (!h->def_regular)
14986 {
14987 /* Mark the symbol as undefined, rather than as
14988 defined in glink. Leave the value if there were
14989 any relocations where pointer equality matters
14990 (this is a clue for the dynamic linker, to make
14991 function pointer comparisons work between an
14992 application and shared library), otherwise set it
14993 to zero. */
14994 sym->st_shndx = SHN_UNDEF;
14995 if (!h->pointer_equality_needed)
14996 sym->st_value = 0;
14997 else if (!h->ref_regular_nonweak)
14998 {
14999 /* This breaks function pointer comparisons, but
15000 that is better than breaking tests for a NULL
15001 function pointer. */
15002 sym->st_value = 0;
15003 }
15004 }
15005 }
15006 }
15007
15008 if (h->needs_copy)
15009 {
15010 /* This symbol needs a copy reloc. Set it up. */
15011
15012 if (h->dynindx == -1
15013 || (h->root.type != bfd_link_hash_defined
15014 && h->root.type != bfd_link_hash_defweak)
15015 || htab->relbss == NULL)
15016 abort ();
15017
15018 rela.r_offset = (h->root.u.def.value
15019 + h->root.u.def.section->output_section->vma
15020 + h->root.u.def.section->output_offset);
15021 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15022 rela.r_addend = 0;
15023 loc = htab->relbss->contents;
15024 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
15025 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15026 }
15027
15028 return TRUE;
15029 }
15030
15031 /* Used to decide how to sort relocs in an optimal manner for the
15032 dynamic linker, before writing them out. */
15033
15034 static enum elf_reloc_type_class
15035 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15036 const asection *rel_sec,
15037 const Elf_Internal_Rela *rela)
15038 {
15039 enum elf_ppc64_reloc_type r_type;
15040 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15041
15042 if (rel_sec == htab->elf.irelplt)
15043 return reloc_class_ifunc;
15044
15045 r_type = ELF64_R_TYPE (rela->r_info);
15046 switch (r_type)
15047 {
15048 case R_PPC64_RELATIVE:
15049 return reloc_class_relative;
15050 case R_PPC64_JMP_SLOT:
15051 return reloc_class_plt;
15052 case R_PPC64_COPY:
15053 return reloc_class_copy;
15054 default:
15055 return reloc_class_normal;
15056 }
15057 }
15058
15059 /* Finish up the dynamic sections. */
15060
15061 static bfd_boolean
15062 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15063 struct bfd_link_info *info)
15064 {
15065 struct ppc_link_hash_table *htab;
15066 bfd *dynobj;
15067 asection *sdyn;
15068
15069 htab = ppc_hash_table (info);
15070 if (htab == NULL)
15071 return FALSE;
15072
15073 dynobj = htab->elf.dynobj;
15074 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15075
15076 if (htab->elf.dynamic_sections_created)
15077 {
15078 Elf64_External_Dyn *dyncon, *dynconend;
15079
15080 if (sdyn == NULL || htab->elf.sgot == NULL)
15081 abort ();
15082
15083 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15084 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15085 for (; dyncon < dynconend; dyncon++)
15086 {
15087 Elf_Internal_Dyn dyn;
15088 asection *s;
15089
15090 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15091
15092 switch (dyn.d_tag)
15093 {
15094 default:
15095 continue;
15096
15097 case DT_PPC64_GLINK:
15098 s = htab->glink;
15099 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15100 /* We stupidly defined DT_PPC64_GLINK to be the start
15101 of glink rather than the first entry point, which is
15102 what ld.so needs, and now have a bigger stub to
15103 support automatic multiple TOCs. */
15104 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15105 break;
15106
15107 case DT_PPC64_OPD:
15108 s = bfd_get_section_by_name (output_bfd, ".opd");
15109 if (s == NULL)
15110 continue;
15111 dyn.d_un.d_ptr = s->vma;
15112 break;
15113
15114 case DT_PPC64_OPT:
15115 if (htab->do_multi_toc && htab->multi_toc_needed)
15116 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15117 break;
15118
15119 case DT_PPC64_OPDSZ:
15120 s = bfd_get_section_by_name (output_bfd, ".opd");
15121 if (s == NULL)
15122 continue;
15123 dyn.d_un.d_val = s->size;
15124 break;
15125
15126 case DT_PLTGOT:
15127 s = htab->elf.splt;
15128 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15129 break;
15130
15131 case DT_JMPREL:
15132 s = htab->elf.srelplt;
15133 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15134 break;
15135
15136 case DT_PLTRELSZ:
15137 dyn.d_un.d_val = htab->elf.srelplt->size;
15138 break;
15139
15140 case DT_RELASZ:
15141 /* Don't count procedure linkage table relocs in the
15142 overall reloc count. */
15143 s = htab->elf.srelplt;
15144 if (s == NULL)
15145 continue;
15146 dyn.d_un.d_val -= s->size;
15147 break;
15148
15149 case DT_RELA:
15150 /* We may not be using the standard ELF linker script.
15151 If .rela.plt is the first .rela section, we adjust
15152 DT_RELA to not include it. */
15153 s = htab->elf.srelplt;
15154 if (s == NULL)
15155 continue;
15156 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15157 continue;
15158 dyn.d_un.d_ptr += s->size;
15159 break;
15160 }
15161
15162 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15163 }
15164 }
15165
15166 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15167 {
15168 /* Fill in the first entry in the global offset table.
15169 We use it to hold the link-time TOCbase. */
15170 bfd_put_64 (output_bfd,
15171 elf_gp (output_bfd) + TOC_BASE_OFF,
15172 htab->elf.sgot->contents);
15173
15174 /* Set .got entry size. */
15175 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15176 }
15177
15178 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15179 {
15180 /* Set .plt entry size. */
15181 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15182 = PLT_ENTRY_SIZE (htab);
15183 }
15184
15185 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15186 brlt ourselves if emitrelocations. */
15187 if (htab->brlt != NULL
15188 && htab->brlt->reloc_count != 0
15189 && !_bfd_elf_link_output_relocs (output_bfd,
15190 htab->brlt,
15191 elf_section_data (htab->brlt)->rela.hdr,
15192 elf_section_data (htab->brlt)->relocs,
15193 NULL))
15194 return FALSE;
15195
15196 if (htab->glink != NULL
15197 && htab->glink->reloc_count != 0
15198 && !_bfd_elf_link_output_relocs (output_bfd,
15199 htab->glink,
15200 elf_section_data (htab->glink)->rela.hdr,
15201 elf_section_data (htab->glink)->relocs,
15202 NULL))
15203 return FALSE;
15204
15205 if (htab->glink_eh_frame != NULL
15206 && htab->glink_eh_frame->size != 0)
15207 {
15208 bfd_vma val;
15209 bfd_byte *p;
15210 asection *stub_sec;
15211
15212 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15213 for (stub_sec = htab->params->stub_bfd->sections;
15214 stub_sec != NULL;
15215 stub_sec = stub_sec->next)
15216 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15217 {
15218 /* FDE length. */
15219 p += 4;
15220 /* CIE pointer. */
15221 p += 4;
15222 /* Offset to stub section. */
15223 val = (stub_sec->output_section->vma
15224 + stub_sec->output_offset);
15225 val -= (htab->glink_eh_frame->output_section->vma
15226 + htab->glink_eh_frame->output_offset
15227 + (p - htab->glink_eh_frame->contents));
15228 if (val + 0x80000000 > 0xffffffff)
15229 {
15230 info->callbacks->einfo
15231 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15232 stub_sec->name);
15233 return FALSE;
15234 }
15235 bfd_put_32 (dynobj, val, p);
15236 p += 4;
15237 /* stub section size. */
15238 p += 4;
15239 /* Augmentation. */
15240 p += 1;
15241 /* Pad. */
15242 p += 7;
15243 }
15244 if (htab->glink != NULL && htab->glink->size != 0)
15245 {
15246 /* FDE length. */
15247 p += 4;
15248 /* CIE pointer. */
15249 p += 4;
15250 /* Offset to .glink. */
15251 val = (htab->glink->output_section->vma
15252 + htab->glink->output_offset
15253 + 8);
15254 val -= (htab->glink_eh_frame->output_section->vma
15255 + htab->glink_eh_frame->output_offset
15256 + (p - htab->glink_eh_frame->contents));
15257 if (val + 0x80000000 > 0xffffffff)
15258 {
15259 info->callbacks->einfo
15260 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15261 htab->glink->name);
15262 return FALSE;
15263 }
15264 bfd_put_32 (dynobj, val, p);
15265 p += 4;
15266 /* .glink size. */
15267 p += 4;
15268 /* Augmentation. */
15269 p += 1;
15270 /* Ops. */
15271 p += 7;
15272 }
15273
15274 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15275 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15276 htab->glink_eh_frame,
15277 htab->glink_eh_frame->contents))
15278 return FALSE;
15279 }
15280
15281 /* We need to handle writing out multiple GOT sections ourselves,
15282 since we didn't add them to DYNOBJ. We know dynobj is the first
15283 bfd. */
15284 while ((dynobj = dynobj->link.next) != NULL)
15285 {
15286 asection *s;
15287
15288 if (!is_ppc64_elf (dynobj))
15289 continue;
15290
15291 s = ppc64_elf_tdata (dynobj)->got;
15292 if (s != NULL
15293 && s->size != 0
15294 && s->output_section != bfd_abs_section_ptr
15295 && !bfd_set_section_contents (output_bfd, s->output_section,
15296 s->contents, s->output_offset,
15297 s->size))
15298 return FALSE;
15299 s = ppc64_elf_tdata (dynobj)->relgot;
15300 if (s != NULL
15301 && s->size != 0
15302 && s->output_section != bfd_abs_section_ptr
15303 && !bfd_set_section_contents (output_bfd, s->output_section,
15304 s->contents, s->output_offset,
15305 s->size))
15306 return FALSE;
15307 }
15308
15309 return TRUE;
15310 }
15311
15312 #include "elf64-target.h"
15313
15314 /* FreeBSD support */
15315
15316 #undef TARGET_LITTLE_SYM
15317 #undef TARGET_LITTLE_NAME
15318
15319 #undef TARGET_BIG_SYM
15320 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15321 #undef TARGET_BIG_NAME
15322 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15323
15324 #undef ELF_OSABI
15325 #define ELF_OSABI ELFOSABI_FREEBSD
15326
15327 #undef elf64_bed
15328 #define elf64_bed elf64_powerpc_fbsd_bed
15329
15330 #include "elf64-target.h"
15331
GDB Binutils - Deliverables
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