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PR15530, mark symbol in executables if it matches dynamic_list
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
85 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
86 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
87 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
88 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91
92 #define elf_backend_object_p ppc64_elf_object_p
93 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
94 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
95 #define elf_backend_write_core_note ppc64_elf_write_core_note
96 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
97 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
98 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
99 #define elf_backend_check_directives ppc64_elf_process_dot_syms
100 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
101 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
102 #define elf_backend_check_relocs ppc64_elf_check_relocs
103 #define elf_backend_gc_keep ppc64_elf_gc_keep
104 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
105 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
106 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
107 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
108 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
109 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
110 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
111 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
112 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
113 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
114 #define elf_backend_action_discarded ppc64_elf_action_discarded
115 #define elf_backend_relocate_section ppc64_elf_relocate_section
116 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
117 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
118 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
119 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
120 #define elf_backend_special_sections ppc64_elf_special_sections
121 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
122
123 /* The name of the dynamic interpreter. This is put in the .interp
124 section. */
125 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
126
127 /* The size in bytes of an entry in the procedure linkage table. */
128 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
129
130 /* The initial size of the plt reserved for the dynamic linker. */
131 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
132
133 /* Offsets to some stack save slots. */
134 #define STK_LR 16
135 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
136 /* This one is dodgy. ELFv2 does not have a linker word, so use the
137 CR save slot. Used only by optimised __tls_get_addr call stub,
138 relying on __tls_get_addr_opt not saving CR.. */
139 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
140
141 /* TOC base pointers offset from start of TOC. */
142 #define TOC_BASE_OFF 0x8000
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176
177 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
178 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
179
180 /* glink call stub instructions. We enter with the index in R0. */
181 #define GLINK_CALL_STUB_SIZE (16*4)
182 /* 0: */
183 /* .quad plt0-1f */
184 /* __glink: */
185 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
186 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
187 /* 1: */
188 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
189 /* ld %2,(0b-1b)(%11) */
190 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
191 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
192 /* ld %12,0(%11) */
193 /* ld %2,8(%11) */
194 /* mtctr %12 */
195 /* ld %11,16(%11) */
196 /* bctr */
197 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
198 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
199 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
200 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
201 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
202
203 /* Pad with this. */
204 #define NOP 0x60000000
205
206 /* Some other nops. */
207 #define CROR_151515 0x4def7b82
208 #define CROR_313131 0x4ffffb82
209
210 /* .glink entries for the first 32k functions are two instructions. */
211 #define LI_R0_0 0x38000000 /* li %r0,0 */
212 #define B_DOT 0x48000000 /* b . */
213
214 /* After that, we need two instructions to load the index, followed by
215 a branch. */
216 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
217 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
218
219 /* Instructions used by the save and restore reg functions. */
220 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
221 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
222 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
223 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
224 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
225 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
226 #define LI_R12_0 0x39800000 /* li %r12,0 */
227 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
228 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
229 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
230 #define BLR 0x4e800020 /* blr */
231
232 /* Since .opd is an array of descriptors and each entry will end up
233 with identical R_PPC64_RELATIVE relocs, there is really no need to
234 propagate .opd relocs; The dynamic linker should be taught to
235 relocate .opd without reloc entries. */
236 #ifndef NO_OPD_RELOCS
237 #define NO_OPD_RELOCS 0
238 #endif
239 \f
240 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
241
242 /* Relocation HOWTO's. */
243 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
244
245 static reloc_howto_type ppc64_elf_howto_raw[] = {
246 /* This reloc does nothing. */
247 HOWTO (R_PPC64_NONE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC64_NONE", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* A standard 32 bit relocation. */
262 HOWTO (R_PPC64_ADDR32, /* type */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 32, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_bitfield, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_PPC64_ADDR32", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0xffffffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* An absolute 26 bit branch; the lower two bits must be zero.
277 FIXME: we don't check that, we just clear them. */
278 HOWTO (R_PPC64_ADDR24, /* type */
279 0, /* rightshift */
280 2, /* size (0 = byte, 1 = short, 2 = long) */
281 26, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_bitfield, /* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_ADDR24", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0x03fffffc, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* A standard 16 bit relocation. */
293 HOWTO (R_PPC64_ADDR16, /* type */
294 0, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR16", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* A 16 bit relocation without overflow. */
308 HOWTO (R_PPC64_ADDR16_LO, /* type */
309 0, /* rightshift */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
311 16, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_dont,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_PPC64_ADDR16_LO", /* name */
317 FALSE, /* partial_inplace */
318 0, /* src_mask */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 /* Bits 16-31 of an address. */
323 HOWTO (R_PPC64_ADDR16_HI, /* type */
324 16, /* rightshift */
325 1, /* size (0 = byte, 1 = short, 2 = long) */
326 16, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_signed, /* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_PPC64_ADDR16_HI", /* name */
332 FALSE, /* partial_inplace */
333 0, /* src_mask */
334 0xffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
338 bits, treated as a signed number, is negative. */
339 HOWTO (R_PPC64_ADDR16_HA, /* type */
340 16, /* rightshift */
341 1, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_signed, /* complain_on_overflow */
346 ppc64_elf_ha_reloc, /* special_function */
347 "R_PPC64_ADDR16_HA", /* name */
348 FALSE, /* partial_inplace */
349 0, /* src_mask */
350 0xffff, /* dst_mask */
351 FALSE), /* pcrel_offset */
352
353 /* An absolute 16 bit branch; the lower two bits must be zero.
354 FIXME: we don't check that, we just clear them. */
355 HOWTO (R_PPC64_ADDR14, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_branch_reloc, /* special_function */
363 "R_PPC64_ADDR14", /* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is expected to be taken. The lower two
371 bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* An absolute 16 bit branch, for which bit 10 should be set to
387 indicate that the branch is not expected to be taken. The lower
388 two bits must be zero. */
389 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 ppc64_elf_brtaken_reloc, /* special_function */
397 "R_PPC64_ADDR14_BRNTAKEN",/* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000fffc, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* A relative 26 bit branch; the lower two bits must be zero. */
404 HOWTO (R_PPC64_REL24, /* type */
405 0, /* rightshift */
406 2, /* size (0 = byte, 1 = short, 2 = long) */
407 26, /* bitsize */
408 TRUE, /* pc_relative */
409 0, /* bitpos */
410 complain_overflow_signed, /* complain_on_overflow */
411 ppc64_elf_branch_reloc, /* special_function */
412 "R_PPC64_REL24", /* name */
413 FALSE, /* partial_inplace */
414 0, /* src_mask */
415 0x03fffffc, /* dst_mask */
416 TRUE), /* pcrel_offset */
417
418 /* A relative 16 bit branch; the lower two bits must be zero. */
419 HOWTO (R_PPC64_REL14, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_branch_reloc, /* special_function */
427 "R_PPC64_REL14", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is expected to be taken. The lower two bits must be
435 zero. */
436 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRTAKEN", /* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* A relative 16 bit branch. Bit 10 should be set to indicate that
451 the branch is not expected to be taken. The lower two bits must
452 be zero. */
453 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 16, /* bitsize */
457 TRUE, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_signed, /* complain_on_overflow */
460 ppc64_elf_brtaken_reloc, /* special_function */
461 "R_PPC64_REL14_BRNTAKEN",/* name */
462 FALSE, /* partial_inplace */
463 0, /* src_mask */
464 0x0000fffc, /* dst_mask */
465 TRUE), /* pcrel_offset */
466
467 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
468 symbol. */
469 HOWTO (R_PPC64_GOT16, /* type */
470 0, /* rightshift */
471 1, /* size (0 = byte, 1 = short, 2 = long) */
472 16, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed, /* complain_on_overflow */
476 ppc64_elf_unhandled_reloc, /* special_function */
477 "R_PPC64_GOT16", /* name */
478 FALSE, /* partial_inplace */
479 0, /* src_mask */
480 0xffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
484 the symbol. */
485 HOWTO (R_PPC64_GOT16_LO, /* type */
486 0, /* rightshift */
487 1, /* size (0 = byte, 1 = short, 2 = long) */
488 16, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_dont, /* complain_on_overflow */
492 ppc64_elf_unhandled_reloc, /* special_function */
493 "R_PPC64_GOT16_LO", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0xffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
500 the symbol. */
501 HOWTO (R_PPC64_GOT16_HI, /* type */
502 16, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_signed,/* complain_on_overflow */
508 ppc64_elf_unhandled_reloc, /* special_function */
509 "R_PPC64_GOT16_HI", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0xffff, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
516 the symbol. */
517 HOWTO (R_PPC64_GOT16_HA, /* type */
518 16, /* rightshift */
519 1, /* size (0 = byte, 1 = short, 2 = long) */
520 16, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_signed,/* complain_on_overflow */
524 ppc64_elf_unhandled_reloc, /* special_function */
525 "R_PPC64_GOT16_HA", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 0xffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* This is used only by the dynamic linker. The symbol should exist
532 both in the object being run and in some shared library. The
533 dynamic linker copies the data addressed by the symbol from the
534 shared library into the object, because the object being
535 run has to have the data at some particular address. */
536 HOWTO (R_PPC64_COPY, /* type */
537 0, /* rightshift */
538 0, /* this one is variable size */
539 0, /* bitsize */
540 FALSE, /* pc_relative */
541 0, /* bitpos */
542 complain_overflow_dont, /* complain_on_overflow */
543 ppc64_elf_unhandled_reloc, /* special_function */
544 "R_PPC64_COPY", /* name */
545 FALSE, /* partial_inplace */
546 0, /* src_mask */
547 0, /* dst_mask */
548 FALSE), /* pcrel_offset */
549
550 /* Like R_PPC64_ADDR64, but used when setting global offset table
551 entries. */
552 HOWTO (R_PPC64_GLOB_DAT, /* type */
553 0, /* rightshift */
554 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
555 64, /* bitsize */
556 FALSE, /* pc_relative */
557 0, /* bitpos */
558 complain_overflow_dont, /* complain_on_overflow */
559 ppc64_elf_unhandled_reloc, /* special_function */
560 "R_PPC64_GLOB_DAT", /* name */
561 FALSE, /* partial_inplace */
562 0, /* src_mask */
563 ONES (64), /* dst_mask */
564 FALSE), /* pcrel_offset */
565
566 /* Created by the link editor. Marks a procedure linkage table
567 entry for a symbol. */
568 HOWTO (R_PPC64_JMP_SLOT, /* type */
569 0, /* rightshift */
570 0, /* size (0 = byte, 1 = short, 2 = long) */
571 0, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 ppc64_elf_unhandled_reloc, /* special_function */
576 "R_PPC64_JMP_SLOT", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Used only by the dynamic linker. When the object is run, this
583 doubleword64 is set to the load address of the object, plus the
584 addend. */
585 HOWTO (R_PPC64_RELATIVE, /* type */
586 0, /* rightshift */
587 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
588 64, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_dont, /* complain_on_overflow */
592 bfd_elf_generic_reloc, /* special_function */
593 "R_PPC64_RELATIVE", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 ONES (64), /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* Like R_PPC64_ADDR32, but may be unaligned. */
600 HOWTO (R_PPC64_UADDR32, /* type */
601 0, /* rightshift */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
603 32, /* bitsize */
604 FALSE, /* pc_relative */
605 0, /* bitpos */
606 complain_overflow_bitfield, /* complain_on_overflow */
607 bfd_elf_generic_reloc, /* special_function */
608 "R_PPC64_UADDR32", /* name */
609 FALSE, /* partial_inplace */
610 0, /* src_mask */
611 0xffffffff, /* dst_mask */
612 FALSE), /* pcrel_offset */
613
614 /* Like R_PPC64_ADDR16, but may be unaligned. */
615 HOWTO (R_PPC64_UADDR16, /* type */
616 0, /* rightshift */
617 1, /* size (0 = byte, 1 = short, 2 = long) */
618 16, /* bitsize */
619 FALSE, /* pc_relative */
620 0, /* bitpos */
621 complain_overflow_bitfield, /* complain_on_overflow */
622 bfd_elf_generic_reloc, /* special_function */
623 "R_PPC64_UADDR16", /* name */
624 FALSE, /* partial_inplace */
625 0, /* src_mask */
626 0xffff, /* dst_mask */
627 FALSE), /* pcrel_offset */
628
629 /* 32-bit PC relative. */
630 HOWTO (R_PPC64_REL32, /* type */
631 0, /* rightshift */
632 2, /* size (0 = byte, 1 = short, 2 = long) */
633 32, /* bitsize */
634 TRUE, /* pc_relative */
635 0, /* bitpos */
636 /* FIXME: Verify. Was complain_overflow_bitfield. */
637 complain_overflow_signed, /* complain_on_overflow */
638 bfd_elf_generic_reloc, /* special_function */
639 "R_PPC64_REL32", /* name */
640 FALSE, /* partial_inplace */
641 0, /* src_mask */
642 0xffffffff, /* dst_mask */
643 TRUE), /* pcrel_offset */
644
645 /* 32-bit relocation to the symbol's procedure linkage table. */
646 HOWTO (R_PPC64_PLT32, /* type */
647 0, /* rightshift */
648 2, /* size (0 = byte, 1 = short, 2 = long) */
649 32, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_bitfield, /* complain_on_overflow */
653 ppc64_elf_unhandled_reloc, /* special_function */
654 "R_PPC64_PLT32", /* name */
655 FALSE, /* partial_inplace */
656 0, /* src_mask */
657 0xffffffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
661 FIXME: R_PPC64_PLTREL32 not supported. */
662 HOWTO (R_PPC64_PLTREL32, /* type */
663 0, /* rightshift */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
665 32, /* bitsize */
666 TRUE, /* pc_relative */
667 0, /* bitpos */
668 complain_overflow_signed, /* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_PPC64_PLTREL32", /* name */
671 FALSE, /* partial_inplace */
672 0, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE), /* pcrel_offset */
675
676 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
677 the symbol. */
678 HOWTO (R_PPC64_PLT16_LO, /* type */
679 0, /* rightshift */
680 1, /* size (0 = byte, 1 = short, 2 = long) */
681 16, /* bitsize */
682 FALSE, /* pc_relative */
683 0, /* bitpos */
684 complain_overflow_dont, /* complain_on_overflow */
685 ppc64_elf_unhandled_reloc, /* special_function */
686 "R_PPC64_PLT16_LO", /* name */
687 FALSE, /* partial_inplace */
688 0, /* src_mask */
689 0xffff, /* dst_mask */
690 FALSE), /* pcrel_offset */
691
692 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
693 the symbol. */
694 HOWTO (R_PPC64_PLT16_HI, /* type */
695 16, /* rightshift */
696 1, /* size (0 = byte, 1 = short, 2 = long) */
697 16, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_signed, /* complain_on_overflow */
701 ppc64_elf_unhandled_reloc, /* special_function */
702 "R_PPC64_PLT16_HI", /* name */
703 FALSE, /* partial_inplace */
704 0, /* src_mask */
705 0xffff, /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
709 the symbol. */
710 HOWTO (R_PPC64_PLT16_HA, /* type */
711 16, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_signed, /* complain_on_overflow */
717 ppc64_elf_unhandled_reloc, /* special_function */
718 "R_PPC64_PLT16_HA", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* 16-bit section relative relocation. */
725 HOWTO (R_PPC64_SECTOFF, /* type */
726 0, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_bitfield, /* complain_on_overflow */
732 ppc64_elf_sectoff_reloc, /* special_function */
733 "R_PPC64_SECTOFF", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* Like R_PPC64_SECTOFF, but no overflow warning. */
740 HOWTO (R_PPC64_SECTOFF_LO, /* type */
741 0, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc64_elf_sectoff_reloc, /* special_function */
748 "R_PPC64_SECTOFF_LO", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* 16-bit upper half section relative relocation. */
755 HOWTO (R_PPC64_SECTOFF_HI, /* type */
756 16, /* rightshift */
757 1, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_signed, /* complain_on_overflow */
762 ppc64_elf_sectoff_reloc, /* special_function */
763 "R_PPC64_SECTOFF_HI", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 /* 16-bit upper half adjusted section relative relocation. */
770 HOWTO (R_PPC64_SECTOFF_HA, /* type */
771 16, /* rightshift */
772 1, /* size (0 = byte, 1 = short, 2 = long) */
773 16, /* bitsize */
774 FALSE, /* pc_relative */
775 0, /* bitpos */
776 complain_overflow_signed, /* complain_on_overflow */
777 ppc64_elf_sectoff_ha_reloc, /* special_function */
778 "R_PPC64_SECTOFF_HA", /* name */
779 FALSE, /* partial_inplace */
780 0, /* src_mask */
781 0xffff, /* dst_mask */
782 FALSE), /* pcrel_offset */
783
784 /* Like R_PPC64_REL24 without touching the two least significant bits. */
785 HOWTO (R_PPC64_REL30, /* type */
786 2, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 30, /* bitsize */
789 TRUE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_REL30", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0xfffffffc, /* dst_mask */
797 TRUE), /* pcrel_offset */
798
799 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
800
801 /* A standard 64-bit relocation. */
802 HOWTO (R_PPC64_ADDR64, /* type */
803 0, /* rightshift */
804 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
805 64, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC64_ADDR64", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 ONES (64), /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* The bits 32-47 of an address. */
817 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
818 32, /* rightshift */
819 1, /* size (0 = byte, 1 = short, 2 = long) */
820 16, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 bfd_elf_generic_reloc, /* special_function */
825 "R_PPC64_ADDR16_HIGHER", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* The bits 32-47 of an address, plus 1 if the contents of the low
832 16 bits, treated as a signed number, is negative. */
833 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
834 32, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_dont, /* complain_on_overflow */
840 ppc64_elf_ha_reloc, /* special_function */
841 "R_PPC64_ADDR16_HIGHERA", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* The bits 48-63 of an address. */
848 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
849 48, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 bfd_elf_generic_reloc, /* special_function */
856 "R_PPC64_ADDR16_HIGHEST", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* The bits 48-63 of an address, plus 1 if the contents of the low
863 16 bits, treated as a signed number, is negative. */
864 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
865 48, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc64_elf_ha_reloc, /* special_function */
872 "R_PPC64_ADDR16_HIGHESTA", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like ADDR64, but may be unaligned. */
879 HOWTO (R_PPC64_UADDR64, /* type */
880 0, /* rightshift */
881 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
882 64, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 bfd_elf_generic_reloc, /* special_function */
887 "R_PPC64_UADDR64", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 ONES (64), /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* 64-bit relative relocation. */
894 HOWTO (R_PPC64_REL64, /* type */
895 0, /* rightshift */
896 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
897 64, /* bitsize */
898 TRUE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 bfd_elf_generic_reloc, /* special_function */
902 "R_PPC64_REL64", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 ONES (64), /* dst_mask */
906 TRUE), /* pcrel_offset */
907
908 /* 64-bit relocation to the symbol's procedure linkage table. */
909 HOWTO (R_PPC64_PLT64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLT64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* 64-bit PC relative relocation to the symbol's procedure linkage
924 table. */
925 /* FIXME: R_PPC64_PLTREL64 not supported. */
926 HOWTO (R_PPC64_PLTREL64, /* type */
927 0, /* rightshift */
928 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
929 64, /* bitsize */
930 TRUE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_dont, /* complain_on_overflow */
933 ppc64_elf_unhandled_reloc, /* special_function */
934 "R_PPC64_PLTREL64", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 ONES (64), /* dst_mask */
938 TRUE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation. */
941
942 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
943 HOWTO (R_PPC64_TOC16, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_signed, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation without overflow. */
958
959 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_LO, /* type */
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_LO", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits. */
975
976 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
977 HOWTO (R_PPC64_TOC16_HI, /* type */
978 16, /* rightshift */
979 1, /* size (0 = byte, 1 = short, 2 = long) */
980 16, /* bitsize */
981 FALSE, /* pc_relative */
982 0, /* bitpos */
983 complain_overflow_signed, /* complain_on_overflow */
984 ppc64_elf_toc_reloc, /* special_function */
985 "R_PPC64_TOC16_HI", /* name */
986 FALSE, /* partial_inplace */
987 0, /* src_mask */
988 0xffff, /* dst_mask */
989 FALSE), /* pcrel_offset */
990
991 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
992 contents of the low 16 bits, treated as a signed number, is
993 negative. */
994
995 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
996 HOWTO (R_PPC64_TOC16_HA, /* type */
997 16, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_signed, /* complain_on_overflow */
1003 ppc64_elf_toc_ha_reloc, /* special_function */
1004 "R_PPC64_TOC16_HA", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1011
1012 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1013 HOWTO (R_PPC64_TOC, /* type */
1014 0, /* rightshift */
1015 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1016 64, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_bitfield, /* complain_on_overflow */
1020 ppc64_elf_toc64_reloc, /* special_function */
1021 "R_PPC64_TOC", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 ONES (64), /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like R_PPC64_GOT16, but also informs the link editor that the
1028 value to relocate may (!) refer to a PLT entry which the link
1029 editor (a) may replace with the symbol value. If the link editor
1030 is unable to fully resolve the symbol, it may (b) create a PLT
1031 entry and store the address to the new PLT entry in the GOT.
1032 This permits lazy resolution of function symbols at run time.
1033 The link editor may also skip all of this and just (c) emit a
1034 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1035 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1036 HOWTO (R_PPC64_PLTGOT16, /* type */
1037 0, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_signed, /* complain_on_overflow */
1043 ppc64_elf_unhandled_reloc, /* special_function */
1044 "R_PPC64_PLTGOT16", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Like R_PPC64_PLTGOT16, but without overflow. */
1051 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1052 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1053 0, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc64_elf_unhandled_reloc, /* special_function */
1060 "R_PPC64_PLTGOT16_LO", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1067 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1068 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1069 16, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_signed, /* complain_on_overflow */
1075 ppc64_elf_unhandled_reloc, /* special_function */
1076 "R_PPC64_PLTGOT16_HI", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1083 1 if the contents of the low 16 bits, treated as a signed number,
1084 is negative. */
1085 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1086 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1087 16, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_signed, /* complain_on_overflow */
1093 ppc64_elf_unhandled_reloc, /* special_function */
1094 "R_PPC64_PLTGOT16_HA", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xffff, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_ADDR16_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_bitfield, /* complain_on_overflow */
1108 bfd_elf_generic_reloc, /* special_function */
1109 "R_PPC64_ADDR16_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_dont,/* complain_on_overflow */
1123 bfd_elf_generic_reloc, /* special_function */
1124 "R_PPC64_ADDR16_LO_DS",/* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_GOT16_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_signed, /* complain_on_overflow */
1138 ppc64_elf_unhandled_reloc, /* special_function */
1139 "R_PPC64_GOT16_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_dont, /* complain_on_overflow */
1153 ppc64_elf_unhandled_reloc, /* special_function */
1154 "R_PPC64_GOT16_LO_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_unhandled_reloc, /* special_function */
1169 "R_PPC64_PLT16_LO_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_bitfield, /* complain_on_overflow */
1183 ppc64_elf_sectoff_reloc, /* special_function */
1184 "R_PPC64_SECTOFF_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_sectoff_reloc, /* special_function */
1199 "R_PPC64_SECTOFF_LO_DS",/* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1206 HOWTO (R_PPC64_TOC16_DS, /* type */
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc64_elf_toc_reloc, /* special_function */
1214 "R_PPC64_TOC16_DS", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xfffc, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1221 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc64_elf_toc_reloc, /* special_function */
1229 "R_PPC64_TOC16_LO_DS", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xfffc, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1236 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1237 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1238 0, /* rightshift */
1239 1, /* size (0 = byte, 1 = short, 2 = long) */
1240 16, /* bitsize */
1241 FALSE, /* pc_relative */
1242 0, /* bitpos */
1243 complain_overflow_signed, /* complain_on_overflow */
1244 ppc64_elf_unhandled_reloc, /* special_function */
1245 "R_PPC64_PLTGOT16_DS", /* name */
1246 FALSE, /* partial_inplace */
1247 0, /* src_mask */
1248 0xfffc, /* dst_mask */
1249 FALSE), /* pcrel_offset */
1250
1251 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1252 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1253 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1254 0, /* rightshift */
1255 1, /* size (0 = byte, 1 = short, 2 = long) */
1256 16, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_dont, /* complain_on_overflow */
1260 ppc64_elf_unhandled_reloc, /* special_function */
1261 "R_PPC64_PLTGOT16_LO_DS",/* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0xfffc, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 /* Marker relocs for TLS. */
1268 HOWTO (R_PPC64_TLS,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLS", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 HOWTO (R_PPC64_TLSGD,
1283 0, /* rightshift */
1284 2, /* size (0 = byte, 1 = short, 2 = long) */
1285 32, /* bitsize */
1286 FALSE, /* pc_relative */
1287 0, /* bitpos */
1288 complain_overflow_dont, /* complain_on_overflow */
1289 bfd_elf_generic_reloc, /* special_function */
1290 "R_PPC64_TLSGD", /* name */
1291 FALSE, /* partial_inplace */
1292 0, /* src_mask */
1293 0, /* dst_mask */
1294 FALSE), /* pcrel_offset */
1295
1296 HOWTO (R_PPC64_TLSLD,
1297 0, /* rightshift */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1299 32, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC64_TLSLD", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 HOWTO (R_PPC64_TOCSAVE,
1311 0, /* rightshift */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1313 32, /* bitsize */
1314 FALSE, /* pc_relative */
1315 0, /* bitpos */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1318 "R_PPC64_TOCSAVE", /* name */
1319 FALSE, /* partial_inplace */
1320 0, /* src_mask */
1321 0, /* dst_mask */
1322 FALSE), /* pcrel_offset */
1323
1324 /* Computes the load module index of the load module that contains the
1325 definition of its TLS sym. */
1326 HOWTO (R_PPC64_DTPMOD64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPMOD64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Computes a dtv-relative displacement, the difference between the value
1341 of sym+add and the base address of the thread-local storage block that
1342 contains the definition of sym, minus 0x8000. */
1343 HOWTO (R_PPC64_DTPREL64,
1344 0, /* rightshift */
1345 4, /* size (0 = byte, 1 = short, 2 = long) */
1346 64, /* bitsize */
1347 FALSE, /* pc_relative */
1348 0, /* bitpos */
1349 complain_overflow_dont, /* complain_on_overflow */
1350 ppc64_elf_unhandled_reloc, /* special_function */
1351 "R_PPC64_DTPREL64", /* name */
1352 FALSE, /* partial_inplace */
1353 0, /* src_mask */
1354 ONES (64), /* dst_mask */
1355 FALSE), /* pcrel_offset */
1356
1357 /* A 16 bit dtprel reloc. */
1358 HOWTO (R_PPC64_DTPREL16,
1359 0, /* rightshift */
1360 1, /* size (0 = byte, 1 = short, 2 = long) */
1361 16, /* bitsize */
1362 FALSE, /* pc_relative */
1363 0, /* bitpos */
1364 complain_overflow_signed, /* complain_on_overflow */
1365 ppc64_elf_unhandled_reloc, /* special_function */
1366 "R_PPC64_DTPREL16", /* name */
1367 FALSE, /* partial_inplace */
1368 0, /* src_mask */
1369 0xffff, /* dst_mask */
1370 FALSE), /* pcrel_offset */
1371
1372 /* Like DTPREL16, but no overflow. */
1373 HOWTO (R_PPC64_DTPREL16_LO,
1374 0, /* rightshift */
1375 1, /* size (0 = byte, 1 = short, 2 = long) */
1376 16, /* bitsize */
1377 FALSE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont, /* complain_on_overflow */
1380 ppc64_elf_unhandled_reloc, /* special_function */
1381 "R_PPC64_DTPREL16_LO", /* name */
1382 FALSE, /* partial_inplace */
1383 0, /* src_mask */
1384 0xffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1386
1387 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1388 HOWTO (R_PPC64_DTPREL16_HI,
1389 16, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc64_elf_unhandled_reloc, /* special_function */
1396 "R_PPC64_DTPREL16_HI", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1403 HOWTO (R_PPC64_DTPREL16_HA,
1404 16, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 16, /* bitsize */
1407 FALSE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 ppc64_elf_unhandled_reloc, /* special_function */
1411 "R_PPC64_DTPREL16_HA", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xffff, /* dst_mask */
1415 FALSE), /* pcrel_offset */
1416
1417 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1418 HOWTO (R_PPC64_DTPREL16_HIGHER,
1419 32, /* rightshift */
1420 1, /* size (0 = byte, 1 = short, 2 = long) */
1421 16, /* bitsize */
1422 FALSE, /* pc_relative */
1423 0, /* bitpos */
1424 complain_overflow_dont, /* complain_on_overflow */
1425 ppc64_elf_unhandled_reloc, /* special_function */
1426 "R_PPC64_DTPREL16_HIGHER", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xffff, /* dst_mask */
1430 FALSE), /* pcrel_offset */
1431
1432 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1433 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1434 32, /* rightshift */
1435 1, /* size (0 = byte, 1 = short, 2 = long) */
1436 16, /* bitsize */
1437 FALSE, /* pc_relative */
1438 0, /* bitpos */
1439 complain_overflow_dont, /* complain_on_overflow */
1440 ppc64_elf_unhandled_reloc, /* special_function */
1441 "R_PPC64_DTPREL16_HIGHERA", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0xffff, /* dst_mask */
1445 FALSE), /* pcrel_offset */
1446
1447 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1448 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1449 48, /* rightshift */
1450 1, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc64_elf_unhandled_reloc, /* special_function */
1456 "R_PPC64_DTPREL16_HIGHEST", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0xffff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1463 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1464 48, /* rightshift */
1465 1, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc64_elf_unhandled_reloc, /* special_function */
1471 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0xffff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Like DTPREL16, but for insns with a DS field. */
1478 HOWTO (R_PPC64_DTPREL16_DS,
1479 0, /* rightshift */
1480 1, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_signed, /* complain_on_overflow */
1485 ppc64_elf_unhandled_reloc, /* special_function */
1486 "R_PPC64_DTPREL16_DS", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0xfffc, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Like DTPREL16_DS, but no overflow. */
1493 HOWTO (R_PPC64_DTPREL16_LO_DS,
1494 0, /* rightshift */
1495 1, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc64_elf_unhandled_reloc, /* special_function */
1501 "R_PPC64_DTPREL16_LO_DS", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0xfffc, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Computes a tp-relative displacement, the difference between the value of
1508 sym+add and the value of the thread pointer (r13). */
1509 HOWTO (R_PPC64_TPREL64,
1510 0, /* rightshift */
1511 4, /* size (0 = byte, 1 = short, 2 = long) */
1512 64, /* bitsize */
1513 FALSE, /* pc_relative */
1514 0, /* bitpos */
1515 complain_overflow_dont, /* complain_on_overflow */
1516 ppc64_elf_unhandled_reloc, /* special_function */
1517 "R_PPC64_TPREL64", /* name */
1518 FALSE, /* partial_inplace */
1519 0, /* src_mask */
1520 ONES (64), /* dst_mask */
1521 FALSE), /* pcrel_offset */
1522
1523 /* A 16 bit tprel reloc. */
1524 HOWTO (R_PPC64_TPREL16,
1525 0, /* rightshift */
1526 1, /* size (0 = byte, 1 = short, 2 = long) */
1527 16, /* bitsize */
1528 FALSE, /* pc_relative */
1529 0, /* bitpos */
1530 complain_overflow_signed, /* complain_on_overflow */
1531 ppc64_elf_unhandled_reloc, /* special_function */
1532 "R_PPC64_TPREL16", /* name */
1533 FALSE, /* partial_inplace */
1534 0, /* src_mask */
1535 0xffff, /* dst_mask */
1536 FALSE), /* pcrel_offset */
1537
1538 /* Like TPREL16, but no overflow. */
1539 HOWTO (R_PPC64_TPREL16_LO,
1540 0, /* rightshift */
1541 1, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_dont, /* complain_on_overflow */
1546 ppc64_elf_unhandled_reloc, /* special_function */
1547 "R_PPC64_TPREL16_LO", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like TPREL16_LO, but next higher group of 16 bits. */
1554 HOWTO (R_PPC64_TPREL16_HI,
1555 16, /* rightshift */
1556 1, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_signed, /* complain_on_overflow */
1561 ppc64_elf_unhandled_reloc, /* special_function */
1562 "R_PPC64_TPREL16_HI", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* Like TPREL16_HI, but adjust for low 16 bits. */
1569 HOWTO (R_PPC64_TPREL16_HA,
1570 16, /* rightshift */
1571 1, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_signed, /* complain_on_overflow */
1576 ppc64_elf_unhandled_reloc, /* special_function */
1577 "R_PPC64_TPREL16_HA", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0xffff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* Like TPREL16_HI, but next higher group of 16 bits. */
1584 HOWTO (R_PPC64_TPREL16_HIGHER,
1585 32, /* rightshift */
1586 1, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 ppc64_elf_unhandled_reloc, /* special_function */
1592 "R_PPC64_TPREL16_HIGHER", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0xffff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1599 HOWTO (R_PPC64_TPREL16_HIGHERA,
1600 32, /* rightshift */
1601 1, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc64_elf_unhandled_reloc, /* special_function */
1607 "R_PPC64_TPREL16_HIGHERA", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0xffff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1614 HOWTO (R_PPC64_TPREL16_HIGHEST,
1615 48, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc64_elf_unhandled_reloc, /* special_function */
1622 "R_PPC64_TPREL16_HIGHEST", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1629 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1630 48, /* rightshift */
1631 1, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc64_elf_unhandled_reloc, /* special_function */
1637 "R_PPC64_TPREL16_HIGHESTA", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0xffff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Like TPREL16, but for insns with a DS field. */
1644 HOWTO (R_PPC64_TPREL16_DS,
1645 0, /* rightshift */
1646 1, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_signed, /* complain_on_overflow */
1651 ppc64_elf_unhandled_reloc, /* special_function */
1652 "R_PPC64_TPREL16_DS", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0xfffc, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* Like TPREL16_DS, but no overflow. */
1659 HOWTO (R_PPC64_TPREL16_LO_DS,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_TPREL16_LO_DS", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xfffc, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1674 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1675 to the first entry relative to the TOC base (r2). */
1676 HOWTO (R_PPC64_GOT_TLSGD16,
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 FALSE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_signed, /* complain_on_overflow */
1683 ppc64_elf_unhandled_reloc, /* special_function */
1684 "R_PPC64_GOT_TLSGD16", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 FALSE), /* pcrel_offset */
1689
1690 /* Like GOT_TLSGD16, but no overflow. */
1691 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1692 0, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 FALSE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont, /* complain_on_overflow */
1698 ppc64_elf_unhandled_reloc, /* special_function */
1699 "R_PPC64_GOT_TLSGD16_LO", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1704
1705 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1706 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 FALSE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_signed, /* complain_on_overflow */
1713 ppc64_elf_unhandled_reloc, /* special_function */
1714 "R_PPC64_GOT_TLSGD16_HI", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 FALSE), /* pcrel_offset */
1719
1720 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1721 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1722 16, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSGD16_HA", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1736 with values (sym+add)@dtpmod and zero, and computes the offset to the
1737 first entry relative to the TOC base (r2). */
1738 HOWTO (R_PPC64_GOT_TLSLD16,
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 FALSE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_signed, /* complain_on_overflow */
1745 ppc64_elf_unhandled_reloc, /* special_function */
1746 "R_PPC64_GOT_TLSLD16", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 FALSE), /* pcrel_offset */
1751
1752 /* Like GOT_TLSLD16, but no overflow. */
1753 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1754 0, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 FALSE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 ppc64_elf_unhandled_reloc, /* special_function */
1761 "R_PPC64_GOT_TLSLD16_LO", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 FALSE), /* pcrel_offset */
1766
1767 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1768 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1769 16, /* rightshift */
1770 1, /* size (0 = byte, 1 = short, 2 = long) */
1771 16, /* bitsize */
1772 FALSE, /* pc_relative */
1773 0, /* bitpos */
1774 complain_overflow_signed, /* complain_on_overflow */
1775 ppc64_elf_unhandled_reloc, /* special_function */
1776 "R_PPC64_GOT_TLSLD16_HI", /* name */
1777 FALSE, /* partial_inplace */
1778 0, /* src_mask */
1779 0xffff, /* dst_mask */
1780 FALSE), /* pcrel_offset */
1781
1782 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1783 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1784 16, /* rightshift */
1785 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 16, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_signed, /* complain_on_overflow */
1790 ppc64_elf_unhandled_reloc, /* special_function */
1791 "R_PPC64_GOT_TLSLD16_HA", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0xffff, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1798 the offset to the entry relative to the TOC base (r2). */
1799 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1800 0, /* rightshift */
1801 1, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc64_elf_unhandled_reloc, /* special_function */
1807 "R_PPC64_GOT_DTPREL16_DS", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0xfffc, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* Like GOT_DTPREL16_DS, but no overflow. */
1814 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1815 0, /* rightshift */
1816 1, /* size (0 = byte, 1 = short, 2 = long) */
1817 16, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 ppc64_elf_unhandled_reloc, /* special_function */
1822 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0xfffc, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1829 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1830 16, /* rightshift */
1831 1, /* size (0 = byte, 1 = short, 2 = long) */
1832 16, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_signed, /* complain_on_overflow */
1836 ppc64_elf_unhandled_reloc, /* special_function */
1837 "R_PPC64_GOT_DTPREL16_HI", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0xffff, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1844 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1845 16, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc64_elf_unhandled_reloc, /* special_function */
1852 "R_PPC64_GOT_DTPREL16_HA", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857
1858 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1859 offset to the entry relative to the TOC base (r2). */
1860 HOWTO (R_PPC64_GOT_TPREL16_DS,
1861 0, /* rightshift */
1862 1, /* size (0 = byte, 1 = short, 2 = long) */
1863 16, /* bitsize */
1864 FALSE, /* pc_relative */
1865 0, /* bitpos */
1866 complain_overflow_signed, /* complain_on_overflow */
1867 ppc64_elf_unhandled_reloc, /* special_function */
1868 "R_PPC64_GOT_TPREL16_DS", /* name */
1869 FALSE, /* partial_inplace */
1870 0, /* src_mask */
1871 0xfffc, /* dst_mask */
1872 FALSE), /* pcrel_offset */
1873
1874 /* Like GOT_TPREL16_DS, but no overflow. */
1875 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1876 0, /* rightshift */
1877 1, /* size (0 = byte, 1 = short, 2 = long) */
1878 16, /* bitsize */
1879 FALSE, /* pc_relative */
1880 0, /* bitpos */
1881 complain_overflow_dont, /* complain_on_overflow */
1882 ppc64_elf_unhandled_reloc, /* special_function */
1883 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1884 FALSE, /* partial_inplace */
1885 0, /* src_mask */
1886 0xfffc, /* dst_mask */
1887 FALSE), /* pcrel_offset */
1888
1889 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1890 HOWTO (R_PPC64_GOT_TPREL16_HI,
1891 16, /* rightshift */
1892 1, /* size (0 = byte, 1 = short, 2 = long) */
1893 16, /* bitsize */
1894 FALSE, /* pc_relative */
1895 0, /* bitpos */
1896 complain_overflow_signed, /* complain_on_overflow */
1897 ppc64_elf_unhandled_reloc, /* special_function */
1898 "R_PPC64_GOT_TPREL16_HI", /* name */
1899 FALSE, /* partial_inplace */
1900 0, /* src_mask */
1901 0xffff, /* dst_mask */
1902 FALSE), /* pcrel_offset */
1903
1904 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1905 HOWTO (R_PPC64_GOT_TPREL16_HA,
1906 16, /* rightshift */
1907 1, /* size (0 = byte, 1 = short, 2 = long) */
1908 16, /* bitsize */
1909 FALSE, /* pc_relative */
1910 0, /* bitpos */
1911 complain_overflow_signed, /* complain_on_overflow */
1912 ppc64_elf_unhandled_reloc, /* special_function */
1913 "R_PPC64_GOT_TPREL16_HA", /* name */
1914 FALSE, /* partial_inplace */
1915 0, /* src_mask */
1916 0xffff, /* dst_mask */
1917 FALSE), /* pcrel_offset */
1918
1919 HOWTO (R_PPC64_JMP_IREL, /* type */
1920 0, /* rightshift */
1921 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1922 0, /* bitsize */
1923 FALSE, /* pc_relative */
1924 0, /* bitpos */
1925 complain_overflow_dont, /* complain_on_overflow */
1926 ppc64_elf_unhandled_reloc, /* special_function */
1927 "R_PPC64_JMP_IREL", /* name */
1928 FALSE, /* partial_inplace */
1929 0, /* src_mask */
1930 0, /* dst_mask */
1931 FALSE), /* pcrel_offset */
1932
1933 HOWTO (R_PPC64_IRELATIVE, /* type */
1934 0, /* rightshift */
1935 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1936 64, /* bitsize */
1937 FALSE, /* pc_relative */
1938 0, /* bitpos */
1939 complain_overflow_dont, /* complain_on_overflow */
1940 bfd_elf_generic_reloc, /* special_function */
1941 "R_PPC64_IRELATIVE", /* name */
1942 FALSE, /* partial_inplace */
1943 0, /* src_mask */
1944 ONES (64), /* dst_mask */
1945 FALSE), /* pcrel_offset */
1946
1947 /* A 16 bit relative relocation. */
1948 HOWTO (R_PPC64_REL16, /* type */
1949 0, /* rightshift */
1950 1, /* size (0 = byte, 1 = short, 2 = long) */
1951 16, /* bitsize */
1952 TRUE, /* pc_relative */
1953 0, /* bitpos */
1954 complain_overflow_bitfield, /* complain_on_overflow */
1955 bfd_elf_generic_reloc, /* special_function */
1956 "R_PPC64_REL16", /* name */
1957 FALSE, /* partial_inplace */
1958 0, /* src_mask */
1959 0xffff, /* dst_mask */
1960 TRUE), /* pcrel_offset */
1961
1962 /* A 16 bit relative relocation without overflow. */
1963 HOWTO (R_PPC64_REL16_LO, /* type */
1964 0, /* rightshift */
1965 1, /* size (0 = byte, 1 = short, 2 = long) */
1966 16, /* bitsize */
1967 TRUE, /* pc_relative */
1968 0, /* bitpos */
1969 complain_overflow_dont,/* complain_on_overflow */
1970 bfd_elf_generic_reloc, /* special_function */
1971 "R_PPC64_REL16_LO", /* name */
1972 FALSE, /* partial_inplace */
1973 0, /* src_mask */
1974 0xffff, /* dst_mask */
1975 TRUE), /* pcrel_offset */
1976
1977 /* The high order 16 bits of a relative address. */
1978 HOWTO (R_PPC64_REL16_HI, /* type */
1979 16, /* rightshift */
1980 1, /* size (0 = byte, 1 = short, 2 = long) */
1981 16, /* bitsize */
1982 TRUE, /* pc_relative */
1983 0, /* bitpos */
1984 complain_overflow_signed, /* complain_on_overflow */
1985 bfd_elf_generic_reloc, /* special_function */
1986 "R_PPC64_REL16_HI", /* name */
1987 FALSE, /* partial_inplace */
1988 0, /* src_mask */
1989 0xffff, /* dst_mask */
1990 TRUE), /* pcrel_offset */
1991
1992 /* The high order 16 bits of a relative address, plus 1 if the contents of
1993 the low 16 bits, treated as a signed number, is negative. */
1994 HOWTO (R_PPC64_REL16_HA, /* type */
1995 16, /* rightshift */
1996 1, /* size (0 = byte, 1 = short, 2 = long) */
1997 16, /* bitsize */
1998 TRUE, /* pc_relative */
1999 0, /* bitpos */
2000 complain_overflow_signed, /* complain_on_overflow */
2001 ppc64_elf_ha_reloc, /* special_function */
2002 "R_PPC64_REL16_HA", /* name */
2003 FALSE, /* partial_inplace */
2004 0, /* src_mask */
2005 0xffff, /* dst_mask */
2006 TRUE), /* pcrel_offset */
2007
2008 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2009 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2010 16, /* rightshift */
2011 1, /* size (0 = byte, 1 = short, 2 = long) */
2012 16, /* bitsize */
2013 FALSE, /* pc_relative */
2014 0, /* bitpos */
2015 complain_overflow_dont, /* complain_on_overflow */
2016 bfd_elf_generic_reloc, /* special_function */
2017 "R_PPC64_ADDR16_HIGH", /* name */
2018 FALSE, /* partial_inplace */
2019 0, /* src_mask */
2020 0xffff, /* dst_mask */
2021 FALSE), /* pcrel_offset */
2022
2023 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2024 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2025 16, /* rightshift */
2026 1, /* size (0 = byte, 1 = short, 2 = long) */
2027 16, /* bitsize */
2028 FALSE, /* pc_relative */
2029 0, /* bitpos */
2030 complain_overflow_dont, /* complain_on_overflow */
2031 ppc64_elf_ha_reloc, /* special_function */
2032 "R_PPC64_ADDR16_HIGHA", /* name */
2033 FALSE, /* partial_inplace */
2034 0, /* src_mask */
2035 0xffff, /* dst_mask */
2036 FALSE), /* pcrel_offset */
2037
2038 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2039 HOWTO (R_PPC64_DTPREL16_HIGH,
2040 16, /* rightshift */
2041 1, /* size (0 = byte, 1 = short, 2 = long) */
2042 16, /* bitsize */
2043 FALSE, /* pc_relative */
2044 0, /* bitpos */
2045 complain_overflow_dont, /* complain_on_overflow */
2046 ppc64_elf_unhandled_reloc, /* special_function */
2047 "R_PPC64_DTPREL16_HIGH", /* name */
2048 FALSE, /* partial_inplace */
2049 0, /* src_mask */
2050 0xffff, /* dst_mask */
2051 FALSE), /* pcrel_offset */
2052
2053 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2054 HOWTO (R_PPC64_DTPREL16_HIGHA,
2055 16, /* rightshift */
2056 1, /* size (0 = byte, 1 = short, 2 = long) */
2057 16, /* bitsize */
2058 FALSE, /* pc_relative */
2059 0, /* bitpos */
2060 complain_overflow_dont, /* complain_on_overflow */
2061 ppc64_elf_unhandled_reloc, /* special_function */
2062 "R_PPC64_DTPREL16_HIGHA", /* name */
2063 FALSE, /* partial_inplace */
2064 0, /* src_mask */
2065 0xffff, /* dst_mask */
2066 FALSE), /* pcrel_offset */
2067
2068 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2069 HOWTO (R_PPC64_TPREL16_HIGH,
2070 16, /* rightshift */
2071 1, /* size (0 = byte, 1 = short, 2 = long) */
2072 16, /* bitsize */
2073 FALSE, /* pc_relative */
2074 0, /* bitpos */
2075 complain_overflow_dont, /* complain_on_overflow */
2076 ppc64_elf_unhandled_reloc, /* special_function */
2077 "R_PPC64_TPREL16_HIGH", /* name */
2078 FALSE, /* partial_inplace */
2079 0, /* src_mask */
2080 0xffff, /* dst_mask */
2081 FALSE), /* pcrel_offset */
2082
2083 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2084 HOWTO (R_PPC64_TPREL16_HIGHA,
2085 16, /* rightshift */
2086 1, /* size (0 = byte, 1 = short, 2 = long) */
2087 16, /* bitsize */
2088 FALSE, /* pc_relative */
2089 0, /* bitpos */
2090 complain_overflow_dont, /* complain_on_overflow */
2091 ppc64_elf_unhandled_reloc, /* special_function */
2092 "R_PPC64_TPREL16_HIGHA", /* name */
2093 FALSE, /* partial_inplace */
2094 0, /* src_mask */
2095 0xffff, /* dst_mask */
2096 FALSE), /* pcrel_offset */
2097
2098 /* GNU extension to record C++ vtable hierarchy. */
2099 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2100 0, /* rightshift */
2101 0, /* size (0 = byte, 1 = short, 2 = long) */
2102 0, /* bitsize */
2103 FALSE, /* pc_relative */
2104 0, /* bitpos */
2105 complain_overflow_dont, /* complain_on_overflow */
2106 NULL, /* special_function */
2107 "R_PPC64_GNU_VTINHERIT", /* name */
2108 FALSE, /* partial_inplace */
2109 0, /* src_mask */
2110 0, /* dst_mask */
2111 FALSE), /* pcrel_offset */
2112
2113 /* GNU extension to record C++ vtable member usage. */
2114 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2115 0, /* rightshift */
2116 0, /* size (0 = byte, 1 = short, 2 = long) */
2117 0, /* bitsize */
2118 FALSE, /* pc_relative */
2119 0, /* bitpos */
2120 complain_overflow_dont, /* complain_on_overflow */
2121 NULL, /* special_function */
2122 "R_PPC64_GNU_VTENTRY", /* name */
2123 FALSE, /* partial_inplace */
2124 0, /* src_mask */
2125 0, /* dst_mask */
2126 FALSE), /* pcrel_offset */
2127 };
2128
2129 \f
2130 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2131 be done. */
2132
2133 static void
2134 ppc_howto_init (void)
2135 {
2136 unsigned int i, type;
2137
2138 for (i = 0;
2139 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2140 i++)
2141 {
2142 type = ppc64_elf_howto_raw[i].type;
2143 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2144 / sizeof (ppc64_elf_howto_table[0])));
2145 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2146 }
2147 }
2148
2149 static reloc_howto_type *
2150 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2151 bfd_reloc_code_real_type code)
2152 {
2153 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2154
2155 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2156 /* Initialize howto table if needed. */
2157 ppc_howto_init ();
2158
2159 switch (code)
2160 {
2161 default:
2162 return NULL;
2163
2164 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2165 break;
2166 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2167 break;
2168 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2169 break;
2170 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2171 break;
2172 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2173 break;
2174 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2175 break;
2176 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2177 break;
2178 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2179 break;
2180 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2181 break;
2182 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2183 break;
2184 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2185 break;
2186 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2187 break;
2188 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2189 break;
2190 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2191 break;
2192 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2193 break;
2194 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2195 break;
2196 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2197 break;
2198 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2199 break;
2200 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2201 break;
2202 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2203 break;
2204 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2205 break;
2206 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2207 break;
2208 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2209 break;
2210 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2211 break;
2212 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2213 break;
2214 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2215 break;
2216 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2217 break;
2218 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2219 break;
2220 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2221 break;
2222 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2223 break;
2224 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2225 break;
2226 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2227 break;
2228 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2229 break;
2230 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2231 break;
2232 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2233 break;
2234 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2235 break;
2236 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2237 break;
2238 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2239 break;
2240 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2241 break;
2242 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2243 break;
2244 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2245 break;
2246 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2247 break;
2248 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2249 break;
2250 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2251 break;
2252 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2253 break;
2254 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2255 break;
2256 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2257 break;
2258 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2259 break;
2260 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2261 break;
2262 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2263 break;
2264 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2265 break;
2266 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2267 break;
2268 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2269 break;
2270 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2271 break;
2272 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2273 break;
2274 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2275 break;
2276 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2277 break;
2278 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2279 break;
2280 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2281 break;
2282 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2283 break;
2284 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2285 break;
2286 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2287 break;
2288 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2289 break;
2290 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2291 break;
2292 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2293 break;
2294 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2295 break;
2296 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2297 break;
2298 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2299 break;
2300 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2301 break;
2302 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2303 break;
2304 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2305 break;
2306 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2307 break;
2308 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2309 break;
2310 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2311 break;
2312 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2313 break;
2314 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2315 break;
2316 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2317 break;
2318 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2319 break;
2320 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2321 break;
2322 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2323 break;
2324 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2325 break;
2326 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2327 break;
2328 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2329 break;
2330 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2331 break;
2332 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2333 break;
2334 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2335 break;
2336 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2337 break;
2338 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2339 break;
2340 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2341 break;
2342 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2343 break;
2344 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2345 break;
2346 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2347 break;
2348 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2349 break;
2350 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2351 break;
2352 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2353 break;
2354 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2355 break;
2356 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2357 break;
2358 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2359 break;
2360 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2361 break;
2362 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2363 break;
2364 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2365 break;
2366 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2367 break;
2368 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2369 break;
2370 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2371 break;
2372 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2373 break;
2374 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2375 break;
2376 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2377 break;
2378 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2379 break;
2380 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2381 break;
2382 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2383 break;
2384 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2385 break;
2386 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2387 break;
2388 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2389 break;
2390 }
2391
2392 return ppc64_elf_howto_table[r];
2393 };
2394
2395 static reloc_howto_type *
2396 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2397 const char *r_name)
2398 {
2399 unsigned int i;
2400
2401 for (i = 0;
2402 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2403 i++)
2404 if (ppc64_elf_howto_raw[i].name != NULL
2405 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2406 return &ppc64_elf_howto_raw[i];
2407
2408 return NULL;
2409 }
2410
2411 /* Set the howto pointer for a PowerPC ELF reloc. */
2412
2413 static void
2414 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2415 Elf_Internal_Rela *dst)
2416 {
2417 unsigned int type;
2418
2419 /* Initialize howto table if needed. */
2420 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2421 ppc_howto_init ();
2422
2423 type = ELF64_R_TYPE (dst->r_info);
2424 if (type >= (sizeof (ppc64_elf_howto_table)
2425 / sizeof (ppc64_elf_howto_table[0])))
2426 {
2427 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2428 abfd, (int) type);
2429 type = R_PPC64_NONE;
2430 }
2431 cache_ptr->howto = ppc64_elf_howto_table[type];
2432 }
2433
2434 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2435
2436 static bfd_reloc_status_type
2437 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2438 void *data, asection *input_section,
2439 bfd *output_bfd, char **error_message)
2440 {
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 /* Adjust the addend for sign extension of the low 16 bits.
2449 We won't actually be using the low 16 bits, so trashing them
2450 doesn't matter. */
2451 reloc_entry->addend += 0x8000;
2452 return bfd_reloc_continue;
2453 }
2454
2455 static bfd_reloc_status_type
2456 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2457 void *data, asection *input_section,
2458 bfd *output_bfd, char **error_message)
2459 {
2460 if (output_bfd != NULL)
2461 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2462 input_section, output_bfd, error_message);
2463
2464 if (strcmp (symbol->section->name, ".opd") == 0
2465 && (symbol->section->owner->flags & DYNAMIC) == 0)
2466 {
2467 bfd_vma dest = opd_entry_value (symbol->section,
2468 symbol->value + reloc_entry->addend,
2469 NULL, NULL, FALSE);
2470 if (dest != (bfd_vma) -1)
2471 reloc_entry->addend = dest - (symbol->value
2472 + symbol->section->output_section->vma
2473 + symbol->section->output_offset);
2474 }
2475 return bfd_reloc_continue;
2476 }
2477
2478 static bfd_reloc_status_type
2479 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2480 void *data, asection *input_section,
2481 bfd *output_bfd, char **error_message)
2482 {
2483 long insn;
2484 enum elf_ppc64_reloc_type r_type;
2485 bfd_size_type octets;
2486 /* Assume 'at' branch hints. */
2487 bfd_boolean is_isa_v2 = TRUE;
2488
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2491 link time. */
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2495
2496 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2497 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2498 insn &= ~(0x01 << 21);
2499 r_type = reloc_entry->howto->type;
2500 if (r_type == R_PPC64_ADDR14_BRTAKEN
2501 || r_type == R_PPC64_REL14_BRTAKEN)
2502 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2503
2504 if (is_isa_v2)
2505 {
2506 /* Set 'a' bit. This is 0b00010 in BO field for branch
2507 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2508 for branch on CTR insns (BO == 1a00t or 1a01t). */
2509 if ((insn & (0x14 << 21)) == (0x04 << 21))
2510 insn |= 0x02 << 21;
2511 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2512 insn |= 0x08 << 21;
2513 else
2514 goto out;
2515 }
2516 else
2517 {
2518 bfd_vma target = 0;
2519 bfd_vma from;
2520
2521 if (!bfd_is_com_section (symbol->section))
2522 target = symbol->value;
2523 target += symbol->section->output_section->vma;
2524 target += symbol->section->output_offset;
2525 target += reloc_entry->addend;
2526
2527 from = (reloc_entry->address
2528 + input_section->output_offset
2529 + input_section->output_section->vma);
2530
2531 /* Invert 'y' bit if not the default. */
2532 if ((bfd_signed_vma) (target - from) < 0)
2533 insn ^= 0x01 << 21;
2534 }
2535 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2536 out:
2537 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2538 input_section, output_bfd, error_message);
2539 }
2540
2541 static bfd_reloc_status_type
2542 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2543 void *data, asection *input_section,
2544 bfd *output_bfd, char **error_message)
2545 {
2546 /* If this is a relocatable link (output_bfd test tells us), just
2547 call the generic function. Any adjustment will be done at final
2548 link time. */
2549 if (output_bfd != NULL)
2550 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2551 input_section, output_bfd, error_message);
2552
2553 /* Subtract the symbol section base address. */
2554 reloc_entry->addend -= symbol->section->output_section->vma;
2555 return bfd_reloc_continue;
2556 }
2557
2558 static bfd_reloc_status_type
2559 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2560 void *data, asection *input_section,
2561 bfd *output_bfd, char **error_message)
2562 {
2563 /* If this is a relocatable link (output_bfd test tells us), just
2564 call the generic function. Any adjustment will be done at final
2565 link time. */
2566 if (output_bfd != NULL)
2567 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2568 input_section, output_bfd, error_message);
2569
2570 /* Subtract the symbol section base address. */
2571 reloc_entry->addend -= symbol->section->output_section->vma;
2572
2573 /* Adjust the addend for sign extension of the low 16 bits. */
2574 reloc_entry->addend += 0x8000;
2575 return bfd_reloc_continue;
2576 }
2577
2578 static bfd_reloc_status_type
2579 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2580 void *data, asection *input_section,
2581 bfd *output_bfd, char **error_message)
2582 {
2583 bfd_vma TOCstart;
2584
2585 /* If this is a relocatable link (output_bfd test tells us), just
2586 call the generic function. Any adjustment will be done at final
2587 link time. */
2588 if (output_bfd != NULL)
2589 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2590 input_section, output_bfd, error_message);
2591
2592 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2593 if (TOCstart == 0)
2594 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2595
2596 /* Subtract the TOC base address. */
2597 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2598 return bfd_reloc_continue;
2599 }
2600
2601 static bfd_reloc_status_type
2602 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2603 void *data, asection *input_section,
2604 bfd *output_bfd, char **error_message)
2605 {
2606 bfd_vma TOCstart;
2607
2608 /* If this is a relocatable link (output_bfd test tells us), just
2609 call the generic function. Any adjustment will be done at final
2610 link time. */
2611 if (output_bfd != NULL)
2612 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2613 input_section, output_bfd, error_message);
2614
2615 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2616 if (TOCstart == 0)
2617 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2618
2619 /* Subtract the TOC base address. */
2620 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2621
2622 /* Adjust the addend for sign extension of the low 16 bits. */
2623 reloc_entry->addend += 0x8000;
2624 return bfd_reloc_continue;
2625 }
2626
2627 static bfd_reloc_status_type
2628 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2629 void *data, asection *input_section,
2630 bfd *output_bfd, char **error_message)
2631 {
2632 bfd_vma TOCstart;
2633 bfd_size_type octets;
2634
2635 /* If this is a relocatable link (output_bfd test tells us), just
2636 call the generic function. Any adjustment will be done at final
2637 link time. */
2638 if (output_bfd != NULL)
2639 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2640 input_section, output_bfd, error_message);
2641
2642 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2643 if (TOCstart == 0)
2644 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2645
2646 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2647 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2648 return bfd_reloc_ok;
2649 }
2650
2651 static bfd_reloc_status_type
2652 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2653 void *data, asection *input_section,
2654 bfd *output_bfd, char **error_message)
2655 {
2656 /* If this is a relocatable link (output_bfd test tells us), just
2657 call the generic function. Any adjustment will be done at final
2658 link time. */
2659 if (output_bfd != NULL)
2660 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2661 input_section, output_bfd, error_message);
2662
2663 if (error_message != NULL)
2664 {
2665 static char buf[60];
2666 sprintf (buf, "generic linker can't handle %s",
2667 reloc_entry->howto->name);
2668 *error_message = buf;
2669 }
2670 return bfd_reloc_dangerous;
2671 }
2672
2673 /* Track GOT entries needed for a given symbol. We might need more
2674 than one got entry per symbol. */
2675 struct got_entry
2676 {
2677 struct got_entry *next;
2678
2679 /* The symbol addend that we'll be placing in the GOT. */
2680 bfd_vma addend;
2681
2682 /* Unlike other ELF targets, we use separate GOT entries for the same
2683 symbol referenced from different input files. This is to support
2684 automatic multiple TOC/GOT sections, where the TOC base can vary
2685 from one input file to another. After partitioning into TOC groups
2686 we merge entries within the group.
2687
2688 Point to the BFD owning this GOT entry. */
2689 bfd *owner;
2690
2691 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2692 TLS_TPREL or TLS_DTPREL for tls entries. */
2693 unsigned char tls_type;
2694
2695 /* Non-zero if got.ent points to real entry. */
2696 unsigned char is_indirect;
2697
2698 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2699 union
2700 {
2701 bfd_signed_vma refcount;
2702 bfd_vma offset;
2703 struct got_entry *ent;
2704 } got;
2705 };
2706
2707 /* The same for PLT. */
2708 struct plt_entry
2709 {
2710 struct plt_entry *next;
2711
2712 bfd_vma addend;
2713
2714 union
2715 {
2716 bfd_signed_vma refcount;
2717 bfd_vma offset;
2718 } plt;
2719 };
2720
2721 struct ppc64_elf_obj_tdata
2722 {
2723 struct elf_obj_tdata elf;
2724
2725 /* Shortcuts to dynamic linker sections. */
2726 asection *got;
2727 asection *relgot;
2728
2729 /* Used during garbage collection. We attach global symbols defined
2730 on removed .opd entries to this section so that the sym is removed. */
2731 asection *deleted_section;
2732
2733 /* TLS local dynamic got entry handling. Support for multiple GOT
2734 sections means we potentially need one of these for each input bfd. */
2735 struct got_entry tlsld_got;
2736
2737 union {
2738 /* A copy of relocs before they are modified for --emit-relocs. */
2739 Elf_Internal_Rela *relocs;
2740
2741 /* Section contents. */
2742 bfd_byte *contents;
2743 } opd;
2744
2745 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2746 the reloc to be in the range -32768 to 32767. */
2747 unsigned int has_small_toc_reloc : 1;
2748
2749 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2750 instruction not one we handle. */
2751 unsigned int unexpected_toc_insn : 1;
2752 };
2753
2754 #define ppc64_elf_tdata(bfd) \
2755 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2756
2757 #define ppc64_tlsld_got(bfd) \
2758 (&ppc64_elf_tdata (bfd)->tlsld_got)
2759
2760 #define is_ppc64_elf(bfd) \
2761 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2762 && elf_object_id (bfd) == PPC64_ELF_DATA)
2763
2764 /* Override the generic function because we store some extras. */
2765
2766 static bfd_boolean
2767 ppc64_elf_mkobject (bfd *abfd)
2768 {
2769 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2770 PPC64_ELF_DATA);
2771 }
2772
2773 /* Fix bad default arch selected for a 64 bit input bfd when the
2774 default is 32 bit. */
2775
2776 static bfd_boolean
2777 ppc64_elf_object_p (bfd *abfd)
2778 {
2779 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2780 {
2781 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2782
2783 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2784 {
2785 /* Relies on arch after 32 bit default being 64 bit default. */
2786 abfd->arch_info = abfd->arch_info->next;
2787 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2788 }
2789 }
2790 return TRUE;
2791 }
2792
2793 /* Support for core dump NOTE sections. */
2794
2795 static bfd_boolean
2796 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2797 {
2798 size_t offset, size;
2799
2800 if (note->descsz != 504)
2801 return FALSE;
2802
2803 /* pr_cursig */
2804 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2805
2806 /* pr_pid */
2807 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2808
2809 /* pr_reg */
2810 offset = 112;
2811 size = 384;
2812
2813 /* Make a ".reg/999" section. */
2814 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2815 size, note->descpos + offset);
2816 }
2817
2818 static bfd_boolean
2819 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2820 {
2821 if (note->descsz != 136)
2822 return FALSE;
2823
2824 elf_tdata (abfd)->core->pid
2825 = bfd_get_32 (abfd, note->descdata + 24);
2826 elf_tdata (abfd)->core->program
2827 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2828 elf_tdata (abfd)->core->command
2829 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2830
2831 return TRUE;
2832 }
2833
2834 static char *
2835 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2836 ...)
2837 {
2838 switch (note_type)
2839 {
2840 default:
2841 return NULL;
2842
2843 case NT_PRPSINFO:
2844 {
2845 char data[136];
2846 va_list ap;
2847
2848 va_start (ap, note_type);
2849 memset (data, 0, sizeof (data));
2850 strncpy (data + 40, va_arg (ap, const char *), 16);
2851 strncpy (data + 56, va_arg (ap, const char *), 80);
2852 va_end (ap);
2853 return elfcore_write_note (abfd, buf, bufsiz,
2854 "CORE", note_type, data, sizeof (data));
2855 }
2856
2857 case NT_PRSTATUS:
2858 {
2859 char data[504];
2860 va_list ap;
2861 long pid;
2862 int cursig;
2863 const void *greg;
2864
2865 va_start (ap, note_type);
2866 memset (data, 0, 112);
2867 pid = va_arg (ap, long);
2868 bfd_put_32 (abfd, pid, data + 32);
2869 cursig = va_arg (ap, int);
2870 bfd_put_16 (abfd, cursig, data + 12);
2871 greg = va_arg (ap, const void *);
2872 memcpy (data + 112, greg, 384);
2873 memset (data + 496, 0, 8);
2874 va_end (ap);
2875 return elfcore_write_note (abfd, buf, bufsiz,
2876 "CORE", note_type, data, sizeof (data));
2877 }
2878 }
2879 }
2880
2881 /* Add extra PPC sections. */
2882
2883 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2884 {
2885 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2886 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2887 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2888 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2889 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2890 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2891 { NULL, 0, 0, 0, 0 }
2892 };
2893
2894 enum _ppc64_sec_type {
2895 sec_normal = 0,
2896 sec_opd = 1,
2897 sec_toc = 2
2898 };
2899
2900 struct _ppc64_elf_section_data
2901 {
2902 struct bfd_elf_section_data elf;
2903
2904 union
2905 {
2906 /* An array with one entry for each opd function descriptor. */
2907 struct _opd_sec_data
2908 {
2909 /* Points to the function code section for local opd entries. */
2910 asection **func_sec;
2911
2912 /* After editing .opd, adjust references to opd local syms. */
2913 long *adjust;
2914 } opd;
2915
2916 /* An array for toc sections, indexed by offset/8. */
2917 struct _toc_sec_data
2918 {
2919 /* Specifies the relocation symbol index used at a given toc offset. */
2920 unsigned *symndx;
2921
2922 /* And the relocation addend. */
2923 bfd_vma *add;
2924 } toc;
2925 } u;
2926
2927 enum _ppc64_sec_type sec_type:2;
2928
2929 /* Flag set when small branches are detected. Used to
2930 select suitable defaults for the stub group size. */
2931 unsigned int has_14bit_branch:1;
2932 };
2933
2934 #define ppc64_elf_section_data(sec) \
2935 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2936
2937 static bfd_boolean
2938 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2939 {
2940 if (!sec->used_by_bfd)
2941 {
2942 struct _ppc64_elf_section_data *sdata;
2943 bfd_size_type amt = sizeof (*sdata);
2944
2945 sdata = bfd_zalloc (abfd, amt);
2946 if (sdata == NULL)
2947 return FALSE;
2948 sec->used_by_bfd = sdata;
2949 }
2950
2951 return _bfd_elf_new_section_hook (abfd, sec);
2952 }
2953
2954 static struct _opd_sec_data *
2955 get_opd_info (asection * sec)
2956 {
2957 if (sec != NULL
2958 && ppc64_elf_section_data (sec) != NULL
2959 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2960 return &ppc64_elf_section_data (sec)->u.opd;
2961 return NULL;
2962 }
2963
2964 static inline int
2965 abiversion (bfd *abfd)
2966 {
2967 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
2968 }
2969
2970 static inline void
2971 set_abiversion (bfd *abfd, int ver)
2972 {
2973 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
2974 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
2975 }
2976 \f
2977 /* Parameters for the qsort hook. */
2978 static bfd_boolean synthetic_relocatable;
2979
2980 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2981
2982 static int
2983 compare_symbols (const void *ap, const void *bp)
2984 {
2985 const asymbol *a = * (const asymbol **) ap;
2986 const asymbol *b = * (const asymbol **) bp;
2987
2988 /* Section symbols first. */
2989 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2990 return -1;
2991 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2992 return 1;
2993
2994 /* then .opd symbols. */
2995 if (strcmp (a->section->name, ".opd") == 0
2996 && strcmp (b->section->name, ".opd") != 0)
2997 return -1;
2998 if (strcmp (a->section->name, ".opd") != 0
2999 && strcmp (b->section->name, ".opd") == 0)
3000 return 1;
3001
3002 /* then other code symbols. */
3003 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3004 == (SEC_CODE | SEC_ALLOC)
3005 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3006 != (SEC_CODE | SEC_ALLOC))
3007 return -1;
3008
3009 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3010 != (SEC_CODE | SEC_ALLOC)
3011 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3012 == (SEC_CODE | SEC_ALLOC))
3013 return 1;
3014
3015 if (synthetic_relocatable)
3016 {
3017 if (a->section->id < b->section->id)
3018 return -1;
3019
3020 if (a->section->id > b->section->id)
3021 return 1;
3022 }
3023
3024 if (a->value + a->section->vma < b->value + b->section->vma)
3025 return -1;
3026
3027 if (a->value + a->section->vma > b->value + b->section->vma)
3028 return 1;
3029
3030 /* For syms with the same value, prefer strong dynamic global function
3031 syms over other syms. */
3032 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3033 return -1;
3034
3035 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3036 return 1;
3037
3038 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3039 return -1;
3040
3041 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3042 return 1;
3043
3044 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3045 return -1;
3046
3047 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3048 return 1;
3049
3050 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3051 return -1;
3052
3053 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3054 return 1;
3055
3056 return 0;
3057 }
3058
3059 /* Search SYMS for a symbol of the given VALUE. */
3060
3061 static asymbol *
3062 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3063 {
3064 long mid;
3065
3066 if (id == -1)
3067 {
3068 while (lo < hi)
3069 {
3070 mid = (lo + hi) >> 1;
3071 if (syms[mid]->value + syms[mid]->section->vma < value)
3072 lo = mid + 1;
3073 else if (syms[mid]->value + syms[mid]->section->vma > value)
3074 hi = mid;
3075 else
3076 return syms[mid];
3077 }
3078 }
3079 else
3080 {
3081 while (lo < hi)
3082 {
3083 mid = (lo + hi) >> 1;
3084 if (syms[mid]->section->id < id)
3085 lo = mid + 1;
3086 else if (syms[mid]->section->id > id)
3087 hi = mid;
3088 else if (syms[mid]->value < value)
3089 lo = mid + 1;
3090 else if (syms[mid]->value > value)
3091 hi = mid;
3092 else
3093 return syms[mid];
3094 }
3095 }
3096 return NULL;
3097 }
3098
3099 static bfd_boolean
3100 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3101 {
3102 bfd_vma vma = *(bfd_vma *) ptr;
3103 return ((section->flags & SEC_ALLOC) != 0
3104 && section->vma <= vma
3105 && vma < section->vma + section->size);
3106 }
3107
3108 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3109 entry syms. Also generate @plt symbols for the glink branch table. */
3110
3111 static long
3112 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3113 long static_count, asymbol **static_syms,
3114 long dyn_count, asymbol **dyn_syms,
3115 asymbol **ret)
3116 {
3117 asymbol *s;
3118 long i;
3119 long count;
3120 char *names;
3121 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3122 asection *opd = NULL;
3123 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3124 asymbol **syms;
3125 int abi = abiversion (abfd);
3126
3127 *ret = NULL;
3128
3129 if (abi < 2)
3130 {
3131 opd = bfd_get_section_by_name (abfd, ".opd");
3132 if (opd == NULL && abi == 1)
3133 return 0;
3134 }
3135
3136 symcount = static_count;
3137 if (!relocatable)
3138 symcount += dyn_count;
3139 if (symcount == 0)
3140 return 0;
3141
3142 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3143 if (syms == NULL)
3144 return -1;
3145
3146 if (!relocatable && static_count != 0 && dyn_count != 0)
3147 {
3148 /* Use both symbol tables. */
3149 memcpy (syms, static_syms, static_count * sizeof (*syms));
3150 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3151 }
3152 else if (!relocatable && static_count == 0)
3153 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3154 else
3155 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3156
3157 synthetic_relocatable = relocatable;
3158 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3159
3160 if (!relocatable && symcount > 1)
3161 {
3162 long j;
3163 /* Trim duplicate syms, since we may have merged the normal and
3164 dynamic symbols. Actually, we only care about syms that have
3165 different values, so trim any with the same value. */
3166 for (i = 1, j = 1; i < symcount; ++i)
3167 if (syms[i - 1]->value + syms[i - 1]->section->vma
3168 != syms[i]->value + syms[i]->section->vma)
3169 syms[j++] = syms[i];
3170 symcount = j;
3171 }
3172
3173 i = 0;
3174 if (strcmp (syms[i]->section->name, ".opd") == 0)
3175 ++i;
3176 codesecsym = i;
3177
3178 for (; i < symcount; ++i)
3179 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3180 != (SEC_CODE | SEC_ALLOC))
3181 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3182 break;
3183 codesecsymend = i;
3184
3185 for (; i < symcount; ++i)
3186 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3187 break;
3188 secsymend = i;
3189
3190 for (; i < symcount; ++i)
3191 if (strcmp (syms[i]->section->name, ".opd") != 0)
3192 break;
3193 opdsymend = i;
3194
3195 for (; i < symcount; ++i)
3196 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3197 != (SEC_CODE | SEC_ALLOC))
3198 break;
3199 symcount = i;
3200
3201 count = 0;
3202
3203 if (relocatable)
3204 {
3205 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3206 arelent *r;
3207 size_t size;
3208 long relcount;
3209
3210 if (opdsymend == secsymend)
3211 goto done;
3212
3213 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3214 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3215 if (relcount == 0)
3216 goto done;
3217
3218 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3219 {
3220 count = -1;
3221 goto done;
3222 }
3223
3224 size = 0;
3225 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3226 {
3227 asymbol *sym;
3228
3229 while (r < opd->relocation + relcount
3230 && r->address < syms[i]->value + opd->vma)
3231 ++r;
3232
3233 if (r == opd->relocation + relcount)
3234 break;
3235
3236 if (r->address != syms[i]->value + opd->vma)
3237 continue;
3238
3239 if (r->howto->type != R_PPC64_ADDR64)
3240 continue;
3241
3242 sym = *r->sym_ptr_ptr;
3243 if (!sym_exists_at (syms, opdsymend, symcount,
3244 sym->section->id, sym->value + r->addend))
3245 {
3246 ++count;
3247 size += sizeof (asymbol);
3248 size += strlen (syms[i]->name) + 2;
3249 }
3250 }
3251
3252 s = *ret = bfd_malloc (size);
3253 if (s == NULL)
3254 {
3255 count = -1;
3256 goto done;
3257 }
3258
3259 names = (char *) (s + count);
3260
3261 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3262 {
3263 asymbol *sym;
3264
3265 while (r < opd->relocation + relcount
3266 && r->address < syms[i]->value + opd->vma)
3267 ++r;
3268
3269 if (r == opd->relocation + relcount)
3270 break;
3271
3272 if (r->address != syms[i]->value + opd->vma)
3273 continue;
3274
3275 if (r->howto->type != R_PPC64_ADDR64)
3276 continue;
3277
3278 sym = *r->sym_ptr_ptr;
3279 if (!sym_exists_at (syms, opdsymend, symcount,
3280 sym->section->id, sym->value + r->addend))
3281 {
3282 size_t len;
3283
3284 *s = *syms[i];
3285 s->flags |= BSF_SYNTHETIC;
3286 s->section = sym->section;
3287 s->value = sym->value + r->addend;
3288 s->name = names;
3289 *names++ = '.';
3290 len = strlen (syms[i]->name);
3291 memcpy (names, syms[i]->name, len + 1);
3292 names += len + 1;
3293 /* Have udata.p point back to the original symbol this
3294 synthetic symbol was derived from. */
3295 s->udata.p = syms[i];
3296 s++;
3297 }
3298 }
3299 }
3300 else
3301 {
3302 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3303 bfd_byte *contents = NULL;
3304 size_t size;
3305 long plt_count = 0;
3306 bfd_vma glink_vma = 0, resolv_vma = 0;
3307 asection *dynamic, *glink = NULL, *relplt = NULL;
3308 arelent *p;
3309
3310 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3311 {
3312 free_contents_and_exit:
3313 if (contents)
3314 free (contents);
3315 count = -1;
3316 goto done;
3317 }
3318
3319 size = 0;
3320 for (i = secsymend; i < opdsymend; ++i)
3321 {
3322 bfd_vma ent;
3323
3324 /* Ignore bogus symbols. */
3325 if (syms[i]->value > opd->size - 8)
3326 continue;
3327
3328 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3329 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3330 {
3331 ++count;
3332 size += sizeof (asymbol);
3333 size += strlen (syms[i]->name) + 2;
3334 }
3335 }
3336
3337 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3338 if (dyn_count != 0
3339 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3340 {
3341 bfd_byte *dynbuf, *extdyn, *extdynend;
3342 size_t extdynsize;
3343 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3344
3345 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3346 goto free_contents_and_exit;
3347
3348 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3349 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3350
3351 extdyn = dynbuf;
3352 extdynend = extdyn + dynamic->size;
3353 for (; extdyn < extdynend; extdyn += extdynsize)
3354 {
3355 Elf_Internal_Dyn dyn;
3356 (*swap_dyn_in) (abfd, extdyn, &dyn);
3357
3358 if (dyn.d_tag == DT_NULL)
3359 break;
3360
3361 if (dyn.d_tag == DT_PPC64_GLINK)
3362 {
3363 /* The first glink stub starts at offset 32; see
3364 comment in ppc64_elf_finish_dynamic_sections. */
3365 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3366 /* The .glink section usually does not survive the final
3367 link; search for the section (usually .text) where the
3368 glink stubs now reside. */
3369 glink = bfd_sections_find_if (abfd, section_covers_vma,
3370 &glink_vma);
3371 break;
3372 }
3373 }
3374
3375 free (dynbuf);
3376 }
3377
3378 if (glink != NULL)
3379 {
3380 /* Determine __glink trampoline by reading the relative branch
3381 from the first glink stub. */
3382 bfd_byte buf[4];
3383 unsigned int off = 0;
3384
3385 while (bfd_get_section_contents (abfd, glink, buf,
3386 glink_vma + off - glink->vma, 4))
3387 {
3388 unsigned int insn = bfd_get_32 (abfd, buf);
3389 insn ^= B_DOT;
3390 if ((insn & ~0x3fffffc) == 0)
3391 {
3392 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3393 break;
3394 }
3395 off += 4;
3396 if (off > 4)
3397 break;
3398 }
3399
3400 if (resolv_vma)
3401 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3402
3403 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3404 if (relplt != NULL)
3405 {
3406 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3407 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3408 goto free_contents_and_exit;
3409
3410 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3411 size += plt_count * sizeof (asymbol);
3412
3413 p = relplt->relocation;
3414 for (i = 0; i < plt_count; i++, p++)
3415 {
3416 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3417 if (p->addend != 0)
3418 size += sizeof ("+0x") - 1 + 16;
3419 }
3420 }
3421 }
3422
3423 s = *ret = bfd_malloc (size);
3424 if (s == NULL)
3425 goto free_contents_and_exit;
3426
3427 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3428
3429 for (i = secsymend; i < opdsymend; ++i)
3430 {
3431 bfd_vma ent;
3432
3433 if (syms[i]->value > opd->size - 8)
3434 continue;
3435
3436 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3437 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3438 {
3439 long lo, hi;
3440 size_t len;
3441 asection *sec = abfd->sections;
3442
3443 *s = *syms[i];
3444 lo = codesecsym;
3445 hi = codesecsymend;
3446 while (lo < hi)
3447 {
3448 long mid = (lo + hi) >> 1;
3449 if (syms[mid]->section->vma < ent)
3450 lo = mid + 1;
3451 else if (syms[mid]->section->vma > ent)
3452 hi = mid;
3453 else
3454 {
3455 sec = syms[mid]->section;
3456 break;
3457 }
3458 }
3459
3460 if (lo >= hi && lo > codesecsym)
3461 sec = syms[lo - 1]->section;
3462
3463 for (; sec != NULL; sec = sec->next)
3464 {
3465 if (sec->vma > ent)
3466 break;
3467 /* SEC_LOAD may not be set if SEC is from a separate debug
3468 info file. */
3469 if ((sec->flags & SEC_ALLOC) == 0)
3470 break;
3471 if ((sec->flags & SEC_CODE) != 0)
3472 s->section = sec;
3473 }
3474 s->flags |= BSF_SYNTHETIC;
3475 s->value = ent - s->section->vma;
3476 s->name = names;
3477 *names++ = '.';
3478 len = strlen (syms[i]->name);
3479 memcpy (names, syms[i]->name, len + 1);
3480 names += len + 1;
3481 /* Have udata.p point back to the original symbol this
3482 synthetic symbol was derived from. */
3483 s->udata.p = syms[i];
3484 s++;
3485 }
3486 }
3487 free (contents);
3488
3489 if (glink != NULL && relplt != NULL)
3490 {
3491 if (resolv_vma)
3492 {
3493 /* Add a symbol for the main glink trampoline. */
3494 memset (s, 0, sizeof *s);
3495 s->the_bfd = abfd;
3496 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3497 s->section = glink;
3498 s->value = resolv_vma - glink->vma;
3499 s->name = names;
3500 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3501 names += sizeof ("__glink_PLTresolve");
3502 s++;
3503 count++;
3504 }
3505
3506 /* FIXME: It would be very much nicer to put sym@plt on the
3507 stub rather than on the glink branch table entry. The
3508 objdump disassembler would then use a sensible symbol
3509 name on plt calls. The difficulty in doing so is
3510 a) finding the stubs, and,
3511 b) matching stubs against plt entries, and,
3512 c) there can be multiple stubs for a given plt entry.
3513
3514 Solving (a) could be done by code scanning, but older
3515 ppc64 binaries used different stubs to current code.
3516 (b) is the tricky one since you need to known the toc
3517 pointer for at least one function that uses a pic stub to
3518 be able to calculate the plt address referenced.
3519 (c) means gdb would need to set multiple breakpoints (or
3520 find the glink branch itself) when setting breakpoints
3521 for pending shared library loads. */
3522 p = relplt->relocation;
3523 for (i = 0; i < plt_count; i++, p++)
3524 {
3525 size_t len;
3526
3527 *s = **p->sym_ptr_ptr;
3528 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3529 we are defining a symbol, ensure one of them is set. */
3530 if ((s->flags & BSF_LOCAL) == 0)
3531 s->flags |= BSF_GLOBAL;
3532 s->flags |= BSF_SYNTHETIC;
3533 s->section = glink;
3534 s->value = glink_vma - glink->vma;
3535 s->name = names;
3536 s->udata.p = NULL;
3537 len = strlen ((*p->sym_ptr_ptr)->name);
3538 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3539 names += len;
3540 if (p->addend != 0)
3541 {
3542 memcpy (names, "+0x", sizeof ("+0x") - 1);
3543 names += sizeof ("+0x") - 1;
3544 bfd_sprintf_vma (abfd, names, p->addend);
3545 names += strlen (names);
3546 }
3547 memcpy (names, "@plt", sizeof ("@plt"));
3548 names += sizeof ("@plt");
3549 s++;
3550 if (abi < 2)
3551 {
3552 glink_vma += 8;
3553 if (i >= 0x8000)
3554 glink_vma += 4;
3555 }
3556 else
3557 glink_vma += 4;
3558 }
3559 count += plt_count;
3560 }
3561 }
3562
3563 done:
3564 free (syms);
3565 return count;
3566 }
3567 \f
3568 /* The following functions are specific to the ELF linker, while
3569 functions above are used generally. Those named ppc64_elf_* are
3570 called by the main ELF linker code. They appear in this file more
3571 or less in the order in which they are called. eg.
3572 ppc64_elf_check_relocs is called early in the link process,
3573 ppc64_elf_finish_dynamic_sections is one of the last functions
3574 called.
3575
3576 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3577 functions have both a function code symbol and a function descriptor
3578 symbol. A call to foo in a relocatable object file looks like:
3579
3580 . .text
3581 . x:
3582 . bl .foo
3583 . nop
3584
3585 The function definition in another object file might be:
3586
3587 . .section .opd
3588 . foo: .quad .foo
3589 . .quad .TOC.@tocbase
3590 . .quad 0
3591 .
3592 . .text
3593 . .foo: blr
3594
3595 When the linker resolves the call during a static link, the branch
3596 unsurprisingly just goes to .foo and the .opd information is unused.
3597 If the function definition is in a shared library, things are a little
3598 different: The call goes via a plt call stub, the opd information gets
3599 copied to the plt, and the linker patches the nop.
3600
3601 . x:
3602 . bl .foo_stub
3603 . ld 2,40(1)
3604 .
3605 .
3606 . .foo_stub:
3607 . std 2,40(1) # in practice, the call stub
3608 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3609 . addi 11,11,Lfoo@toc@l # this is the general idea
3610 . ld 12,0(11)
3611 . ld 2,8(11)
3612 . mtctr 12
3613 . ld 11,16(11)
3614 . bctr
3615 .
3616 . .section .plt
3617 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3618
3619 The "reloc ()" notation is supposed to indicate that the linker emits
3620 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3621 copying.
3622
3623 What are the difficulties here? Well, firstly, the relocations
3624 examined by the linker in check_relocs are against the function code
3625 sym .foo, while the dynamic relocation in the plt is emitted against
3626 the function descriptor symbol, foo. Somewhere along the line, we need
3627 to carefully copy dynamic link information from one symbol to the other.
3628 Secondly, the generic part of the elf linker will make .foo a dynamic
3629 symbol as is normal for most other backends. We need foo dynamic
3630 instead, at least for an application final link. However, when
3631 creating a shared library containing foo, we need to have both symbols
3632 dynamic so that references to .foo are satisfied during the early
3633 stages of linking. Otherwise the linker might decide to pull in a
3634 definition from some other object, eg. a static library.
3635
3636 Update: As of August 2004, we support a new convention. Function
3637 calls may use the function descriptor symbol, ie. "bl foo". This
3638 behaves exactly as "bl .foo". */
3639
3640 /* Of those relocs that might be copied as dynamic relocs, this function
3641 selects those that must be copied when linking a shared library,
3642 even when the symbol is local. */
3643
3644 static int
3645 must_be_dyn_reloc (struct bfd_link_info *info,
3646 enum elf_ppc64_reloc_type r_type)
3647 {
3648 switch (r_type)
3649 {
3650 default:
3651 return 1;
3652
3653 case R_PPC64_REL32:
3654 case R_PPC64_REL64:
3655 case R_PPC64_REL30:
3656 return 0;
3657
3658 case R_PPC64_TPREL16:
3659 case R_PPC64_TPREL16_LO:
3660 case R_PPC64_TPREL16_HI:
3661 case R_PPC64_TPREL16_HA:
3662 case R_PPC64_TPREL16_DS:
3663 case R_PPC64_TPREL16_LO_DS:
3664 case R_PPC64_TPREL16_HIGH:
3665 case R_PPC64_TPREL16_HIGHA:
3666 case R_PPC64_TPREL16_HIGHER:
3667 case R_PPC64_TPREL16_HIGHERA:
3668 case R_PPC64_TPREL16_HIGHEST:
3669 case R_PPC64_TPREL16_HIGHESTA:
3670 case R_PPC64_TPREL64:
3671 return !info->executable;
3672 }
3673 }
3674
3675 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3676 copying dynamic variables from a shared lib into an app's dynbss
3677 section, and instead use a dynamic relocation to point into the
3678 shared lib. With code that gcc generates, it's vital that this be
3679 enabled; In the PowerPC64 ABI, the address of a function is actually
3680 the address of a function descriptor, which resides in the .opd
3681 section. gcc uses the descriptor directly rather than going via the
3682 GOT as some other ABI's do, which means that initialized function
3683 pointers must reference the descriptor. Thus, a function pointer
3684 initialized to the address of a function in a shared library will
3685 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3686 redefines the function descriptor symbol to point to the copy. This
3687 presents a problem as a plt entry for that function is also
3688 initialized from the function descriptor symbol and the copy reloc
3689 may not be initialized first. */
3690 #define ELIMINATE_COPY_RELOCS 1
3691
3692 /* Section name for stubs is the associated section name plus this
3693 string. */
3694 #define STUB_SUFFIX ".stub"
3695
3696 /* Linker stubs.
3697 ppc_stub_long_branch:
3698 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3699 destination, but a 24 bit branch in a stub section will reach.
3700 . b dest
3701
3702 ppc_stub_plt_branch:
3703 Similar to the above, but a 24 bit branch in the stub section won't
3704 reach its destination.
3705 . addis %r11,%r2,xxx@toc@ha
3706 . ld %r12,xxx@toc@l(%r11)
3707 . mtctr %r12
3708 . bctr
3709
3710 ppc_stub_plt_call:
3711 Used to call a function in a shared library. If it so happens that
3712 the plt entry referenced crosses a 64k boundary, then an extra
3713 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3714 . std %r2,40(%r1)
3715 . addis %r11,%r2,xxx@toc@ha
3716 . ld %r12,xxx+0@toc@l(%r11)
3717 . mtctr %r12
3718 . ld %r2,xxx+8@toc@l(%r11)
3719 . ld %r11,xxx+16@toc@l(%r11)
3720 . bctr
3721
3722 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3723 code to adjust the value and save r2 to support multiple toc sections.
3724 A ppc_stub_long_branch with an r2 offset looks like:
3725 . std %r2,40(%r1)
3726 . addis %r2,%r2,off@ha
3727 . addi %r2,%r2,off@l
3728 . b dest
3729
3730 A ppc_stub_plt_branch with an r2 offset looks like:
3731 . std %r2,40(%r1)
3732 . addis %r11,%r2,xxx@toc@ha
3733 . ld %r12,xxx@toc@l(%r11)
3734 . addis %r2,%r2,off@ha
3735 . addi %r2,%r2,off@l
3736 . mtctr %r12
3737 . bctr
3738
3739 In cases where the "addis" instruction would add zero, the "addis" is
3740 omitted and following instructions modified slightly in some cases.
3741 */
3742
3743 enum ppc_stub_type {
3744 ppc_stub_none,
3745 ppc_stub_long_branch,
3746 ppc_stub_long_branch_r2off,
3747 ppc_stub_plt_branch,
3748 ppc_stub_plt_branch_r2off,
3749 ppc_stub_plt_call,
3750 ppc_stub_plt_call_r2save
3751 };
3752
3753 struct ppc_stub_hash_entry {
3754
3755 /* Base hash table entry structure. */
3756 struct bfd_hash_entry root;
3757
3758 enum ppc_stub_type stub_type;
3759
3760 /* The stub section. */
3761 asection *stub_sec;
3762
3763 /* Offset within stub_sec of the beginning of this stub. */
3764 bfd_vma stub_offset;
3765
3766 /* Given the symbol's value and its section we can determine its final
3767 value when building the stubs (so the stub knows where to jump. */
3768 bfd_vma target_value;
3769 asection *target_section;
3770
3771 /* The symbol table entry, if any, that this was derived from. */
3772 struct ppc_link_hash_entry *h;
3773 struct plt_entry *plt_ent;
3774
3775 /* Where this stub is being called from, or, in the case of combined
3776 stub sections, the first input section in the group. */
3777 asection *id_sec;
3778
3779 /* Symbol st_other. */
3780 unsigned char other;
3781 };
3782
3783 struct ppc_branch_hash_entry {
3784
3785 /* Base hash table entry structure. */
3786 struct bfd_hash_entry root;
3787
3788 /* Offset within branch lookup table. */
3789 unsigned int offset;
3790
3791 /* Generation marker. */
3792 unsigned int iter;
3793 };
3794
3795 /* Used to track dynamic relocations for local symbols. */
3796 struct ppc_dyn_relocs
3797 {
3798 struct ppc_dyn_relocs *next;
3799
3800 /* The input section of the reloc. */
3801 asection *sec;
3802
3803 /* Total number of relocs copied for the input section. */
3804 unsigned int count : 31;
3805
3806 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3807 unsigned int ifunc : 1;
3808 };
3809
3810 struct ppc_link_hash_entry
3811 {
3812 struct elf_link_hash_entry elf;
3813
3814 union {
3815 /* A pointer to the most recently used stub hash entry against this
3816 symbol. */
3817 struct ppc_stub_hash_entry *stub_cache;
3818
3819 /* A pointer to the next symbol starting with a '.' */
3820 struct ppc_link_hash_entry *next_dot_sym;
3821 } u;
3822
3823 /* Track dynamic relocs copied for this symbol. */
3824 struct elf_dyn_relocs *dyn_relocs;
3825
3826 /* Link between function code and descriptor symbols. */
3827 struct ppc_link_hash_entry *oh;
3828
3829 /* Flag function code and descriptor symbols. */
3830 unsigned int is_func:1;
3831 unsigned int is_func_descriptor:1;
3832 unsigned int fake:1;
3833
3834 /* Whether global opd/toc sym has been adjusted or not.
3835 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3836 should be set for all globals defined in any opd/toc section. */
3837 unsigned int adjust_done:1;
3838
3839 /* Set if we twiddled this symbol to weak at some stage. */
3840 unsigned int was_undefined:1;
3841
3842 /* Contexts in which symbol is used in the GOT (or TOC).
3843 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3844 corresponding relocs are encountered during check_relocs.
3845 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3846 indicate the corresponding GOT entry type is not needed.
3847 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3848 a TPREL one. We use a separate flag rather than setting TPREL
3849 just for convenience in distinguishing the two cases. */
3850 #define TLS_GD 1 /* GD reloc. */
3851 #define TLS_LD 2 /* LD reloc. */
3852 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3853 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3854 #define TLS_TLS 16 /* Any TLS reloc. */
3855 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3856 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3857 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3858 unsigned char tls_mask;
3859 };
3860
3861 /* ppc64 ELF linker hash table. */
3862
3863 struct ppc_link_hash_table
3864 {
3865 struct elf_link_hash_table elf;
3866
3867 /* The stub hash table. */
3868 struct bfd_hash_table stub_hash_table;
3869
3870 /* Another hash table for plt_branch stubs. */
3871 struct bfd_hash_table branch_hash_table;
3872
3873 /* Hash table for function prologue tocsave. */
3874 htab_t tocsave_htab;
3875
3876 /* Linker stub bfd. */
3877 bfd *stub_bfd;
3878
3879 /* Linker call-backs. */
3880 asection * (*add_stub_section) (const char *, asection *);
3881 void (*layout_sections_again) (void);
3882
3883 /* Array to keep track of which stub sections have been created, and
3884 information on stub grouping. */
3885 struct map_stub {
3886 /* This is the section to which stubs in the group will be attached. */
3887 asection *link_sec;
3888 /* The stub section. */
3889 asection *stub_sec;
3890 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3891 bfd_vma toc_off;
3892 } *stub_group;
3893
3894 /* Temp used when calculating TOC pointers. */
3895 bfd_vma toc_curr;
3896 bfd *toc_bfd;
3897 asection *toc_first_sec;
3898
3899 /* Highest input section id. */
3900 int top_id;
3901
3902 /* Highest output section index. */
3903 int top_index;
3904
3905 /* Used when adding symbols. */
3906 struct ppc_link_hash_entry *dot_syms;
3907
3908 /* List of input sections for each output section. */
3909 asection **input_list;
3910
3911 /* Shortcuts to get to dynamic linker sections. */
3912 asection *dynbss;
3913 asection *relbss;
3914 asection *glink;
3915 asection *sfpr;
3916 asection *brlt;
3917 asection *relbrlt;
3918 asection *glink_eh_frame;
3919
3920 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3921 struct ppc_link_hash_entry *tls_get_addr;
3922 struct ppc_link_hash_entry *tls_get_addr_fd;
3923
3924 /* The size of reliplt used by got entry relocs. */
3925 bfd_size_type got_reli_size;
3926
3927 /* Statistics. */
3928 unsigned long stub_count[ppc_stub_plt_call_r2save];
3929
3930 /* Number of stubs against global syms. */
3931 unsigned long stub_globals;
3932
3933 /* Alignment of PLT call stubs. */
3934 unsigned int plt_stub_align:4;
3935
3936 /* Set if we're linking code with function descriptors. */
3937 unsigned int opd_abi:1;
3938
3939 /* Set if PLT call stubs should load r11. */
3940 unsigned int plt_static_chain:1;
3941
3942 /* Set if PLT call stubs need a read-read barrier. */
3943 unsigned int plt_thread_safe:1;
3944
3945 /* Set if we should emit symbols for stubs. */
3946 unsigned int emit_stub_syms:1;
3947
3948 /* Set if __tls_get_addr optimization should not be done. */
3949 unsigned int no_tls_get_addr_opt:1;
3950
3951 /* Support for multiple toc sections. */
3952 unsigned int do_multi_toc:1;
3953 unsigned int multi_toc_needed:1;
3954 unsigned int second_toc_pass:1;
3955 unsigned int do_toc_opt:1;
3956
3957 /* Set on error. */
3958 unsigned int stub_error:1;
3959
3960 /* Temp used by ppc64_elf_process_dot_syms. */
3961 unsigned int twiddled_syms:1;
3962
3963 /* Incremented every time we size stubs. */
3964 unsigned int stub_iteration;
3965
3966 /* Small local sym cache. */
3967 struct sym_cache sym_cache;
3968 };
3969
3970 /* Rename some of the generic section flags to better document how they
3971 are used here. */
3972
3973 /* Nonzero if this section has TLS related relocations. */
3974 #define has_tls_reloc sec_flg0
3975
3976 /* Nonzero if this section has a call to __tls_get_addr. */
3977 #define has_tls_get_addr_call sec_flg1
3978
3979 /* Nonzero if this section has any toc or got relocs. */
3980 #define has_toc_reloc sec_flg2
3981
3982 /* Nonzero if this section has a call to another section that uses
3983 the toc or got. */
3984 #define makes_toc_func_call sec_flg3
3985
3986 /* Recursion protection when determining above flag. */
3987 #define call_check_in_progress sec_flg4
3988 #define call_check_done sec_flg5
3989
3990 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3991
3992 #define ppc_hash_table(p) \
3993 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3994 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3995
3996 #define ppc_stub_hash_lookup(table, string, create, copy) \
3997 ((struct ppc_stub_hash_entry *) \
3998 bfd_hash_lookup ((table), (string), (create), (copy)))
3999
4000 #define ppc_branch_hash_lookup(table, string, create, copy) \
4001 ((struct ppc_branch_hash_entry *) \
4002 bfd_hash_lookup ((table), (string), (create), (copy)))
4003
4004 /* Create an entry in the stub hash table. */
4005
4006 static struct bfd_hash_entry *
4007 stub_hash_newfunc (struct bfd_hash_entry *entry,
4008 struct bfd_hash_table *table,
4009 const char *string)
4010 {
4011 /* Allocate the structure if it has not already been allocated by a
4012 subclass. */
4013 if (entry == NULL)
4014 {
4015 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4016 if (entry == NULL)
4017 return entry;
4018 }
4019
4020 /* Call the allocation method of the superclass. */
4021 entry = bfd_hash_newfunc (entry, table, string);
4022 if (entry != NULL)
4023 {
4024 struct ppc_stub_hash_entry *eh;
4025
4026 /* Initialize the local fields. */
4027 eh = (struct ppc_stub_hash_entry *) entry;
4028 eh->stub_type = ppc_stub_none;
4029 eh->stub_sec = NULL;
4030 eh->stub_offset = 0;
4031 eh->target_value = 0;
4032 eh->target_section = NULL;
4033 eh->h = NULL;
4034 eh->plt_ent = NULL;
4035 eh->id_sec = NULL;
4036 eh->other = 0;
4037 }
4038
4039 return entry;
4040 }
4041
4042 /* Create an entry in the branch hash table. */
4043
4044 static struct bfd_hash_entry *
4045 branch_hash_newfunc (struct bfd_hash_entry *entry,
4046 struct bfd_hash_table *table,
4047 const char *string)
4048 {
4049 /* Allocate the structure if it has not already been allocated by a
4050 subclass. */
4051 if (entry == NULL)
4052 {
4053 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4054 if (entry == NULL)
4055 return entry;
4056 }
4057
4058 /* Call the allocation method of the superclass. */
4059 entry = bfd_hash_newfunc (entry, table, string);
4060 if (entry != NULL)
4061 {
4062 struct ppc_branch_hash_entry *eh;
4063
4064 /* Initialize the local fields. */
4065 eh = (struct ppc_branch_hash_entry *) entry;
4066 eh->offset = 0;
4067 eh->iter = 0;
4068 }
4069
4070 return entry;
4071 }
4072
4073 /* Create an entry in a ppc64 ELF linker hash table. */
4074
4075 static struct bfd_hash_entry *
4076 link_hash_newfunc (struct bfd_hash_entry *entry,
4077 struct bfd_hash_table *table,
4078 const char *string)
4079 {
4080 /* Allocate the structure if it has not already been allocated by a
4081 subclass. */
4082 if (entry == NULL)
4083 {
4084 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4085 if (entry == NULL)
4086 return entry;
4087 }
4088
4089 /* Call the allocation method of the superclass. */
4090 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4091 if (entry != NULL)
4092 {
4093 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4094
4095 memset (&eh->u.stub_cache, 0,
4096 (sizeof (struct ppc_link_hash_entry)
4097 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4098
4099 /* When making function calls, old ABI code references function entry
4100 points (dot symbols), while new ABI code references the function
4101 descriptor symbol. We need to make any combination of reference and
4102 definition work together, without breaking archive linking.
4103
4104 For a defined function "foo" and an undefined call to "bar":
4105 An old object defines "foo" and ".foo", references ".bar" (possibly
4106 "bar" too).
4107 A new object defines "foo" and references "bar".
4108
4109 A new object thus has no problem with its undefined symbols being
4110 satisfied by definitions in an old object. On the other hand, the
4111 old object won't have ".bar" satisfied by a new object.
4112
4113 Keep a list of newly added dot-symbols. */
4114
4115 if (string[0] == '.')
4116 {
4117 struct ppc_link_hash_table *htab;
4118
4119 htab = (struct ppc_link_hash_table *) table;
4120 eh->u.next_dot_sym = htab->dot_syms;
4121 htab->dot_syms = eh;
4122 }
4123 }
4124
4125 return entry;
4126 }
4127
4128 struct tocsave_entry {
4129 asection *sec;
4130 bfd_vma offset;
4131 };
4132
4133 static hashval_t
4134 tocsave_htab_hash (const void *p)
4135 {
4136 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4137 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4138 }
4139
4140 static int
4141 tocsave_htab_eq (const void *p1, const void *p2)
4142 {
4143 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4144 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4145 return e1->sec == e2->sec && e1->offset == e2->offset;
4146 }
4147
4148 /* Create a ppc64 ELF linker hash table. */
4149
4150 static struct bfd_link_hash_table *
4151 ppc64_elf_link_hash_table_create (bfd *abfd)
4152 {
4153 struct ppc_link_hash_table *htab;
4154 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4155
4156 htab = bfd_zmalloc (amt);
4157 if (htab == NULL)
4158 return NULL;
4159
4160 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4161 sizeof (struct ppc_link_hash_entry),
4162 PPC64_ELF_DATA))
4163 {
4164 free (htab);
4165 return NULL;
4166 }
4167
4168 /* Init the stub hash table too. */
4169 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4170 sizeof (struct ppc_stub_hash_entry)))
4171 {
4172 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4173 return NULL;
4174 }
4175
4176 /* And the branch hash table. */
4177 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4178 sizeof (struct ppc_branch_hash_entry)))
4179 {
4180 bfd_hash_table_free (&htab->stub_hash_table);
4181 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4182 return NULL;
4183 }
4184
4185 htab->tocsave_htab = htab_try_create (1024,
4186 tocsave_htab_hash,
4187 tocsave_htab_eq,
4188 NULL);
4189 if (htab->tocsave_htab == NULL)
4190 {
4191 bfd_hash_table_free (&htab->branch_hash_table);
4192 bfd_hash_table_free (&htab->stub_hash_table);
4193 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4194 return NULL;
4195 }
4196
4197 /* Initializing two fields of the union is just cosmetic. We really
4198 only care about glist, but when compiled on a 32-bit host the
4199 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4200 debugger inspection of these fields look nicer. */
4201 htab->elf.init_got_refcount.refcount = 0;
4202 htab->elf.init_got_refcount.glist = NULL;
4203 htab->elf.init_plt_refcount.refcount = 0;
4204 htab->elf.init_plt_refcount.glist = NULL;
4205 htab->elf.init_got_offset.offset = 0;
4206 htab->elf.init_got_offset.glist = NULL;
4207 htab->elf.init_plt_offset.offset = 0;
4208 htab->elf.init_plt_offset.glist = NULL;
4209
4210 return &htab->elf.root;
4211 }
4212
4213 /* Free the derived linker hash table. */
4214
4215 static void
4216 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4217 {
4218 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4219
4220 bfd_hash_table_free (&htab->stub_hash_table);
4221 bfd_hash_table_free (&htab->branch_hash_table);
4222 if (htab->tocsave_htab)
4223 htab_delete (htab->tocsave_htab);
4224 _bfd_elf_link_hash_table_free (hash);
4225 }
4226
4227 /* Create sections for linker generated code. */
4228
4229 static bfd_boolean
4230 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4231 {
4232 struct ppc_link_hash_table *htab;
4233 flagword flags;
4234
4235 htab = ppc_hash_table (info);
4236
4237 /* Create .sfpr for code to save and restore fp regs. */
4238 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4239 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4240 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4241 flags);
4242 if (htab->sfpr == NULL
4243 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4244 return FALSE;
4245
4246 /* Create .glink for lazy dynamic linking support. */
4247 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4248 flags);
4249 if (htab->glink == NULL
4250 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4251 return FALSE;
4252
4253 if (!info->no_ld_generated_unwind_info)
4254 {
4255 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4256 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4257 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4258 ".eh_frame",
4259 flags);
4260 if (htab->glink_eh_frame == NULL
4261 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4262 return FALSE;
4263 }
4264
4265 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4266 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4267 if (htab->elf.iplt == NULL
4268 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4269 return FALSE;
4270
4271 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4272 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4273 htab->elf.irelplt
4274 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4275 if (htab->elf.irelplt == NULL
4276 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4277 return FALSE;
4278
4279 /* Create branch lookup table for plt_branch stubs. */
4280 flags = (SEC_ALLOC | SEC_LOAD
4281 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4282 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4283 flags);
4284 if (htab->brlt == NULL
4285 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4286 return FALSE;
4287
4288 if (!info->shared)
4289 return TRUE;
4290
4291 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4292 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4293 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4294 ".rela.branch_lt",
4295 flags);
4296 if (htab->relbrlt == NULL
4297 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4298 return FALSE;
4299
4300 return TRUE;
4301 }
4302
4303 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4304
4305 bfd_boolean
4306 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4307 {
4308 struct ppc_link_hash_table *htab;
4309
4310 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4311
4312 /* Always hook our dynamic sections into the first bfd, which is the
4313 linker created stub bfd. This ensures that the GOT header is at
4314 the start of the output TOC section. */
4315 htab = ppc_hash_table (info);
4316 if (htab == NULL)
4317 return FALSE;
4318 htab->stub_bfd = abfd;
4319 htab->elf.dynobj = abfd;
4320
4321 if (info->relocatable)
4322 return TRUE;
4323
4324 return create_linkage_sections (htab->elf.dynobj, info);
4325 }
4326
4327 /* Build a name for an entry in the stub hash table. */
4328
4329 static char *
4330 ppc_stub_name (const asection *input_section,
4331 const asection *sym_sec,
4332 const struct ppc_link_hash_entry *h,
4333 const Elf_Internal_Rela *rel)
4334 {
4335 char *stub_name;
4336 ssize_t len;
4337
4338 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4339 offsets from a sym as a branch target? In fact, we could
4340 probably assume the addend is always zero. */
4341 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4342
4343 if (h)
4344 {
4345 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4346 stub_name = bfd_malloc (len);
4347 if (stub_name == NULL)
4348 return stub_name;
4349
4350 len = sprintf (stub_name, "%08x.%s+%x",
4351 input_section->id & 0xffffffff,
4352 h->elf.root.root.string,
4353 (int) rel->r_addend & 0xffffffff);
4354 }
4355 else
4356 {
4357 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4358 stub_name = bfd_malloc (len);
4359 if (stub_name == NULL)
4360 return stub_name;
4361
4362 len = sprintf (stub_name, "%08x.%x:%x+%x",
4363 input_section->id & 0xffffffff,
4364 sym_sec->id & 0xffffffff,
4365 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4366 (int) rel->r_addend & 0xffffffff);
4367 }
4368 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4369 stub_name[len - 2] = 0;
4370 return stub_name;
4371 }
4372
4373 /* Look up an entry in the stub hash. Stub entries are cached because
4374 creating the stub name takes a bit of time. */
4375
4376 static struct ppc_stub_hash_entry *
4377 ppc_get_stub_entry (const asection *input_section,
4378 const asection *sym_sec,
4379 struct ppc_link_hash_entry *h,
4380 const Elf_Internal_Rela *rel,
4381 struct ppc_link_hash_table *htab)
4382 {
4383 struct ppc_stub_hash_entry *stub_entry;
4384 const asection *id_sec;
4385
4386 /* If this input section is part of a group of sections sharing one
4387 stub section, then use the id of the first section in the group.
4388 Stub names need to include a section id, as there may well be
4389 more than one stub used to reach say, printf, and we need to
4390 distinguish between them. */
4391 id_sec = htab->stub_group[input_section->id].link_sec;
4392
4393 if (h != NULL && h->u.stub_cache != NULL
4394 && h->u.stub_cache->h == h
4395 && h->u.stub_cache->id_sec == id_sec)
4396 {
4397 stub_entry = h->u.stub_cache;
4398 }
4399 else
4400 {
4401 char *stub_name;
4402
4403 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4404 if (stub_name == NULL)
4405 return NULL;
4406
4407 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4408 stub_name, FALSE, FALSE);
4409 if (h != NULL)
4410 h->u.stub_cache = stub_entry;
4411
4412 free (stub_name);
4413 }
4414
4415 return stub_entry;
4416 }
4417
4418 /* Add a new stub entry to the stub hash. Not all fields of the new
4419 stub entry are initialised. */
4420
4421 static struct ppc_stub_hash_entry *
4422 ppc_add_stub (const char *stub_name,
4423 asection *section,
4424 struct bfd_link_info *info)
4425 {
4426 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4427 asection *link_sec;
4428 asection *stub_sec;
4429 struct ppc_stub_hash_entry *stub_entry;
4430
4431 link_sec = htab->stub_group[section->id].link_sec;
4432 stub_sec = htab->stub_group[section->id].stub_sec;
4433 if (stub_sec == NULL)
4434 {
4435 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4436 if (stub_sec == NULL)
4437 {
4438 size_t namelen;
4439 bfd_size_type len;
4440 char *s_name;
4441
4442 namelen = strlen (link_sec->name);
4443 len = namelen + sizeof (STUB_SUFFIX);
4444 s_name = bfd_alloc (htab->stub_bfd, len);
4445 if (s_name == NULL)
4446 return NULL;
4447
4448 memcpy (s_name, link_sec->name, namelen);
4449 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4450 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4451 if (stub_sec == NULL)
4452 return NULL;
4453 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4454 }
4455 htab->stub_group[section->id].stub_sec = stub_sec;
4456 }
4457
4458 /* Enter this entry into the linker stub hash table. */
4459 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4460 TRUE, FALSE);
4461 if (stub_entry == NULL)
4462 {
4463 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4464 section->owner, stub_name);
4465 return NULL;
4466 }
4467
4468 stub_entry->stub_sec = stub_sec;
4469 stub_entry->stub_offset = 0;
4470 stub_entry->id_sec = link_sec;
4471 return stub_entry;
4472 }
4473
4474 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4475 not already done. */
4476
4477 static bfd_boolean
4478 create_got_section (bfd *abfd, struct bfd_link_info *info)
4479 {
4480 asection *got, *relgot;
4481 flagword flags;
4482 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4483
4484 if (!is_ppc64_elf (abfd))
4485 return FALSE;
4486 if (htab == NULL)
4487 return FALSE;
4488
4489 if (!htab->elf.sgot
4490 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4491 return FALSE;
4492
4493 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4494 | SEC_LINKER_CREATED);
4495
4496 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4497 if (!got
4498 || !bfd_set_section_alignment (abfd, got, 3))
4499 return FALSE;
4500
4501 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4502 flags | SEC_READONLY);
4503 if (!relgot
4504 || ! bfd_set_section_alignment (abfd, relgot, 3))
4505 return FALSE;
4506
4507 ppc64_elf_tdata (abfd)->got = got;
4508 ppc64_elf_tdata (abfd)->relgot = relgot;
4509 return TRUE;
4510 }
4511
4512 /* Create the dynamic sections, and set up shortcuts. */
4513
4514 static bfd_boolean
4515 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4516 {
4517 struct ppc_link_hash_table *htab;
4518
4519 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4520 return FALSE;
4521
4522 htab = ppc_hash_table (info);
4523 if (htab == NULL)
4524 return FALSE;
4525
4526 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4527 if (!info->shared)
4528 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4529
4530 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4531 || (!info->shared && !htab->relbss))
4532 abort ();
4533
4534 return TRUE;
4535 }
4536
4537 /* Follow indirect and warning symbol links. */
4538
4539 static inline struct bfd_link_hash_entry *
4540 follow_link (struct bfd_link_hash_entry *h)
4541 {
4542 while (h->type == bfd_link_hash_indirect
4543 || h->type == bfd_link_hash_warning)
4544 h = h->u.i.link;
4545 return h;
4546 }
4547
4548 static inline struct elf_link_hash_entry *
4549 elf_follow_link (struct elf_link_hash_entry *h)
4550 {
4551 return (struct elf_link_hash_entry *) follow_link (&h->root);
4552 }
4553
4554 static inline struct ppc_link_hash_entry *
4555 ppc_follow_link (struct ppc_link_hash_entry *h)
4556 {
4557 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4558 }
4559
4560 /* Merge PLT info on FROM with that on TO. */
4561
4562 static void
4563 move_plt_plist (struct ppc_link_hash_entry *from,
4564 struct ppc_link_hash_entry *to)
4565 {
4566 if (from->elf.plt.plist != NULL)
4567 {
4568 if (to->elf.plt.plist != NULL)
4569 {
4570 struct plt_entry **entp;
4571 struct plt_entry *ent;
4572
4573 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4574 {
4575 struct plt_entry *dent;
4576
4577 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4578 if (dent->addend == ent->addend)
4579 {
4580 dent->plt.refcount += ent->plt.refcount;
4581 *entp = ent->next;
4582 break;
4583 }
4584 if (dent == NULL)
4585 entp = &ent->next;
4586 }
4587 *entp = to->elf.plt.plist;
4588 }
4589
4590 to->elf.plt.plist = from->elf.plt.plist;
4591 from->elf.plt.plist = NULL;
4592 }
4593 }
4594
4595 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4596
4597 static void
4598 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4599 struct elf_link_hash_entry *dir,
4600 struct elf_link_hash_entry *ind)
4601 {
4602 struct ppc_link_hash_entry *edir, *eind;
4603
4604 edir = (struct ppc_link_hash_entry *) dir;
4605 eind = (struct ppc_link_hash_entry *) ind;
4606
4607 edir->is_func |= eind->is_func;
4608 edir->is_func_descriptor |= eind->is_func_descriptor;
4609 edir->tls_mask |= eind->tls_mask;
4610 if (eind->oh != NULL)
4611 edir->oh = ppc_follow_link (eind->oh);
4612
4613 /* If called to transfer flags for a weakdef during processing
4614 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4615 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4616 if (!(ELIMINATE_COPY_RELOCS
4617 && eind->elf.root.type != bfd_link_hash_indirect
4618 && edir->elf.dynamic_adjusted))
4619 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4620
4621 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4622 edir->elf.ref_regular |= eind->elf.ref_regular;
4623 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4624 edir->elf.needs_plt |= eind->elf.needs_plt;
4625 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4626
4627 /* Copy over any dynamic relocs we may have on the indirect sym. */
4628 if (eind->dyn_relocs != NULL)
4629 {
4630 if (edir->dyn_relocs != NULL)
4631 {
4632 struct elf_dyn_relocs **pp;
4633 struct elf_dyn_relocs *p;
4634
4635 /* Add reloc counts against the indirect sym to the direct sym
4636 list. Merge any entries against the same section. */
4637 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4638 {
4639 struct elf_dyn_relocs *q;
4640
4641 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4642 if (q->sec == p->sec)
4643 {
4644 q->pc_count += p->pc_count;
4645 q->count += p->count;
4646 *pp = p->next;
4647 break;
4648 }
4649 if (q == NULL)
4650 pp = &p->next;
4651 }
4652 *pp = edir->dyn_relocs;
4653 }
4654
4655 edir->dyn_relocs = eind->dyn_relocs;
4656 eind->dyn_relocs = NULL;
4657 }
4658
4659 /* If we were called to copy over info for a weak sym, that's all.
4660 You might think dyn_relocs need not be copied over; After all,
4661 both syms will be dynamic or both non-dynamic so we're just
4662 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4663 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4664 dyn_relocs in read-only sections, and it does so on what is the
4665 DIR sym here. */
4666 if (eind->elf.root.type != bfd_link_hash_indirect)
4667 return;
4668
4669 /* Copy over got entries that we may have already seen to the
4670 symbol which just became indirect. */
4671 if (eind->elf.got.glist != NULL)
4672 {
4673 if (edir->elf.got.glist != NULL)
4674 {
4675 struct got_entry **entp;
4676 struct got_entry *ent;
4677
4678 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4679 {
4680 struct got_entry *dent;
4681
4682 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4683 if (dent->addend == ent->addend
4684 && dent->owner == ent->owner
4685 && dent->tls_type == ent->tls_type)
4686 {
4687 dent->got.refcount += ent->got.refcount;
4688 *entp = ent->next;
4689 break;
4690 }
4691 if (dent == NULL)
4692 entp = &ent->next;
4693 }
4694 *entp = edir->elf.got.glist;
4695 }
4696
4697 edir->elf.got.glist = eind->elf.got.glist;
4698 eind->elf.got.glist = NULL;
4699 }
4700
4701 /* And plt entries. */
4702 move_plt_plist (eind, edir);
4703
4704 if (eind->elf.dynindx != -1)
4705 {
4706 if (edir->elf.dynindx != -1)
4707 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4708 edir->elf.dynstr_index);
4709 edir->elf.dynindx = eind->elf.dynindx;
4710 edir->elf.dynstr_index = eind->elf.dynstr_index;
4711 eind->elf.dynindx = -1;
4712 eind->elf.dynstr_index = 0;
4713 }
4714 }
4715
4716 /* Find the function descriptor hash entry from the given function code
4717 hash entry FH. Link the entries via their OH fields. */
4718
4719 static struct ppc_link_hash_entry *
4720 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4721 {
4722 struct ppc_link_hash_entry *fdh = fh->oh;
4723
4724 if (fdh == NULL)
4725 {
4726 const char *fd_name = fh->elf.root.root.string + 1;
4727
4728 fdh = (struct ppc_link_hash_entry *)
4729 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4730 if (fdh == NULL)
4731 return fdh;
4732
4733 fdh->is_func_descriptor = 1;
4734 fdh->oh = fh;
4735 fh->is_func = 1;
4736 fh->oh = fdh;
4737 }
4738
4739 return ppc_follow_link (fdh);
4740 }
4741
4742 /* Make a fake function descriptor sym for the code sym FH. */
4743
4744 static struct ppc_link_hash_entry *
4745 make_fdh (struct bfd_link_info *info,
4746 struct ppc_link_hash_entry *fh)
4747 {
4748 bfd *abfd;
4749 asymbol *newsym;
4750 struct bfd_link_hash_entry *bh;
4751 struct ppc_link_hash_entry *fdh;
4752
4753 abfd = fh->elf.root.u.undef.abfd;
4754 newsym = bfd_make_empty_symbol (abfd);
4755 newsym->name = fh->elf.root.root.string + 1;
4756 newsym->section = bfd_und_section_ptr;
4757 newsym->value = 0;
4758 newsym->flags = BSF_WEAK;
4759
4760 bh = NULL;
4761 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4762 newsym->flags, newsym->section,
4763 newsym->value, NULL, FALSE, FALSE,
4764 &bh))
4765 return NULL;
4766
4767 fdh = (struct ppc_link_hash_entry *) bh;
4768 fdh->elf.non_elf = 0;
4769 fdh->fake = 1;
4770 fdh->is_func_descriptor = 1;
4771 fdh->oh = fh;
4772 fh->is_func = 1;
4773 fh->oh = fdh;
4774 return fdh;
4775 }
4776
4777 /* Fix function descriptor symbols defined in .opd sections to be
4778 function type. */
4779
4780 static bfd_boolean
4781 ppc64_elf_add_symbol_hook (bfd *ibfd,
4782 struct bfd_link_info *info,
4783 Elf_Internal_Sym *isym,
4784 const char **name,
4785 flagword *flags ATTRIBUTE_UNUSED,
4786 asection **sec,
4787 bfd_vma *value ATTRIBUTE_UNUSED)
4788 {
4789 if ((ibfd->flags & DYNAMIC) == 0
4790 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4791 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4792
4793 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4794 {
4795 if ((ibfd->flags & DYNAMIC) == 0)
4796 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4797 }
4798 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4799 ;
4800 else if (*sec != NULL
4801 && strcmp ((*sec)->name, ".opd") == 0)
4802 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4803
4804 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4805 {
4806 if (abiversion (ibfd) == 0)
4807 set_abiversion (ibfd, 2);
4808 else if (abiversion (ibfd) == 1)
4809 {
4810 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4811 " for ABI version 1\n"), name);
4812 bfd_set_error (bfd_error_bad_value);
4813 return FALSE;
4814 }
4815 }
4816
4817 return TRUE;
4818 }
4819
4820 /* Merge non-visibility st_other attributes: local entry point. */
4821
4822 static void
4823 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4824 const Elf_Internal_Sym *isym,
4825 bfd_boolean definition,
4826 bfd_boolean dynamic)
4827 {
4828 if (definition && !dynamic)
4829 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4830 | ELF_ST_VISIBILITY (h->other));
4831 }
4832
4833 /* This function makes an old ABI object reference to ".bar" cause the
4834 inclusion of a new ABI object archive that defines "bar".
4835 NAME is a symbol defined in an archive. Return a symbol in the hash
4836 table that might be satisfied by the archive symbols. */
4837
4838 static struct elf_link_hash_entry *
4839 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4840 struct bfd_link_info *info,
4841 const char *name)
4842 {
4843 struct elf_link_hash_entry *h;
4844 char *dot_name;
4845 size_t len;
4846
4847 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4848 if (h != NULL
4849 /* Don't return this sym if it is a fake function descriptor
4850 created by add_symbol_adjust. */
4851 && !(h->root.type == bfd_link_hash_undefweak
4852 && ((struct ppc_link_hash_entry *) h)->fake))
4853 return h;
4854
4855 if (name[0] == '.')
4856 return h;
4857
4858 len = strlen (name);
4859 dot_name = bfd_alloc (abfd, len + 2);
4860 if (dot_name == NULL)
4861 return (struct elf_link_hash_entry *) 0 - 1;
4862 dot_name[0] = '.';
4863 memcpy (dot_name + 1, name, len + 1);
4864 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4865 bfd_release (abfd, dot_name);
4866 return h;
4867 }
4868
4869 /* This function satisfies all old ABI object references to ".bar" if a
4870 new ABI object defines "bar". Well, at least, undefined dot symbols
4871 are made weak. This stops later archive searches from including an
4872 object if we already have a function descriptor definition. It also
4873 prevents the linker complaining about undefined symbols.
4874 We also check and correct mismatched symbol visibility here. The
4875 most restrictive visibility of the function descriptor and the
4876 function entry symbol is used. */
4877
4878 static bfd_boolean
4879 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4880 {
4881 struct ppc_link_hash_table *htab;
4882 struct ppc_link_hash_entry *fdh;
4883
4884 if (eh->elf.root.type == bfd_link_hash_indirect)
4885 return TRUE;
4886
4887 if (eh->elf.root.type == bfd_link_hash_warning)
4888 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4889
4890 if (eh->elf.root.root.string[0] != '.')
4891 abort ();
4892
4893 htab = ppc_hash_table (info);
4894 if (htab == NULL)
4895 return FALSE;
4896
4897 fdh = lookup_fdh (eh, htab);
4898 if (fdh == NULL)
4899 {
4900 if (!info->relocatable
4901 && (eh->elf.root.type == bfd_link_hash_undefined
4902 || eh->elf.root.type == bfd_link_hash_undefweak)
4903 && eh->elf.ref_regular)
4904 {
4905 /* Make an undefweak function descriptor sym, which is enough to
4906 pull in an --as-needed shared lib, but won't cause link
4907 errors. Archives are handled elsewhere. */
4908 fdh = make_fdh (info, eh);
4909 if (fdh == NULL)
4910 return FALSE;
4911 fdh->elf.ref_regular = 1;
4912 }
4913 }
4914 else
4915 {
4916 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4917 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4918 if (entry_vis < descr_vis)
4919 fdh->elf.other += entry_vis - descr_vis;
4920 else if (entry_vis > descr_vis)
4921 eh->elf.other += descr_vis - entry_vis;
4922
4923 if ((fdh->elf.root.type == bfd_link_hash_defined
4924 || fdh->elf.root.type == bfd_link_hash_defweak)
4925 && eh->elf.root.type == bfd_link_hash_undefined)
4926 {
4927 eh->elf.root.type = bfd_link_hash_undefweak;
4928 eh->was_undefined = 1;
4929 htab->twiddled_syms = 1;
4930 }
4931 }
4932
4933 return TRUE;
4934 }
4935
4936 /* Process list of dot-symbols we made in link_hash_newfunc. */
4937
4938 static bfd_boolean
4939 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4940 {
4941 struct ppc_link_hash_table *htab;
4942 struct ppc_link_hash_entry **p, *eh;
4943
4944 if (!is_ppc64_elf (info->output_bfd))
4945 return TRUE;
4946 htab = ppc_hash_table (info);
4947 if (htab == NULL)
4948 return FALSE;
4949
4950 if (is_ppc64_elf (ibfd))
4951 {
4952 p = &htab->dot_syms;
4953 while ((eh = *p) != NULL)
4954 {
4955 *p = NULL;
4956 if (&eh->elf == htab->elf.hgot)
4957 ;
4958 else if (htab->elf.hgot == NULL
4959 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4960 htab->elf.hgot = &eh->elf;
4961 else if (!add_symbol_adjust (eh, info))
4962 return FALSE;
4963 p = &eh->u.next_dot_sym;
4964 }
4965 }
4966
4967 /* Clear the list for non-ppc64 input files. */
4968 p = &htab->dot_syms;
4969 while ((eh = *p) != NULL)
4970 {
4971 *p = NULL;
4972 p = &eh->u.next_dot_sym;
4973 }
4974
4975 /* We need to fix the undefs list for any syms we have twiddled to
4976 undef_weak. */
4977 if (htab->twiddled_syms)
4978 {
4979 bfd_link_repair_undef_list (&htab->elf.root);
4980 htab->twiddled_syms = 0;
4981 }
4982 return TRUE;
4983 }
4984
4985 /* Undo hash table changes when an --as-needed input file is determined
4986 not to be needed. */
4987
4988 static bfd_boolean
4989 ppc64_elf_notice_as_needed (bfd *ibfd,
4990 struct bfd_link_info *info,
4991 enum notice_asneeded_action act)
4992 {
4993 if (act == notice_not_needed)
4994 {
4995 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4996
4997 if (htab == NULL)
4998 return FALSE;
4999
5000 htab->dot_syms = NULL;
5001 }
5002 return _bfd_elf_notice_as_needed (ibfd, info, act);
5003 }
5004
5005 /* If --just-symbols against a final linked binary, then assume we need
5006 toc adjusting stubs when calling functions defined there. */
5007
5008 static void
5009 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5010 {
5011 if ((sec->flags & SEC_CODE) != 0
5012 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5013 && is_ppc64_elf (sec->owner))
5014 {
5015 if (abiversion (sec->owner) >= 2
5016 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5017 sec->has_toc_reloc = 1;
5018 }
5019 _bfd_elf_link_just_syms (sec, info);
5020 }
5021
5022 static struct plt_entry **
5023 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5024 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5025 {
5026 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5027 struct plt_entry **local_plt;
5028 unsigned char *local_got_tls_masks;
5029
5030 if (local_got_ents == NULL)
5031 {
5032 bfd_size_type size = symtab_hdr->sh_info;
5033
5034 size *= (sizeof (*local_got_ents)
5035 + sizeof (*local_plt)
5036 + sizeof (*local_got_tls_masks));
5037 local_got_ents = bfd_zalloc (abfd, size);
5038 if (local_got_ents == NULL)
5039 return NULL;
5040 elf_local_got_ents (abfd) = local_got_ents;
5041 }
5042
5043 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5044 {
5045 struct got_entry *ent;
5046
5047 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5048 if (ent->addend == r_addend
5049 && ent->owner == abfd
5050 && ent->tls_type == tls_type)
5051 break;
5052 if (ent == NULL)
5053 {
5054 bfd_size_type amt = sizeof (*ent);
5055 ent = bfd_alloc (abfd, amt);
5056 if (ent == NULL)
5057 return FALSE;
5058 ent->next = local_got_ents[r_symndx];
5059 ent->addend = r_addend;
5060 ent->owner = abfd;
5061 ent->tls_type = tls_type;
5062 ent->is_indirect = FALSE;
5063 ent->got.refcount = 0;
5064 local_got_ents[r_symndx] = ent;
5065 }
5066 ent->got.refcount += 1;
5067 }
5068
5069 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5070 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5071 local_got_tls_masks[r_symndx] |= tls_type;
5072
5073 return local_plt + r_symndx;
5074 }
5075
5076 static bfd_boolean
5077 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5078 {
5079 struct plt_entry *ent;
5080
5081 for (ent = *plist; ent != NULL; ent = ent->next)
5082 if (ent->addend == addend)
5083 break;
5084 if (ent == NULL)
5085 {
5086 bfd_size_type amt = sizeof (*ent);
5087 ent = bfd_alloc (abfd, amt);
5088 if (ent == NULL)
5089 return FALSE;
5090 ent->next = *plist;
5091 ent->addend = addend;
5092 ent->plt.refcount = 0;
5093 *plist = ent;
5094 }
5095 ent->plt.refcount += 1;
5096 return TRUE;
5097 }
5098
5099 static bfd_boolean
5100 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5101 {
5102 return (r_type == R_PPC64_REL24
5103 || r_type == R_PPC64_REL14
5104 || r_type == R_PPC64_REL14_BRTAKEN
5105 || r_type == R_PPC64_REL14_BRNTAKEN
5106 || r_type == R_PPC64_ADDR24
5107 || r_type == R_PPC64_ADDR14
5108 || r_type == R_PPC64_ADDR14_BRTAKEN
5109 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5110 }
5111
5112 /* Look through the relocs for a section during the first phase, and
5113 calculate needed space in the global offset table, procedure
5114 linkage table, and dynamic reloc sections. */
5115
5116 static bfd_boolean
5117 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5118 asection *sec, const Elf_Internal_Rela *relocs)
5119 {
5120 struct ppc_link_hash_table *htab;
5121 Elf_Internal_Shdr *symtab_hdr;
5122 struct elf_link_hash_entry **sym_hashes;
5123 const Elf_Internal_Rela *rel;
5124 const Elf_Internal_Rela *rel_end;
5125 asection *sreloc;
5126 asection **opd_sym_map;
5127 struct elf_link_hash_entry *tga, *dottga;
5128
5129 if (info->relocatable)
5130 return TRUE;
5131
5132 /* Don't do anything special with non-loaded, non-alloced sections.
5133 In particular, any relocs in such sections should not affect GOT
5134 and PLT reference counting (ie. we don't allow them to create GOT
5135 or PLT entries), there's no possibility or desire to optimize TLS
5136 relocs, and there's not much point in propagating relocs to shared
5137 libs that the dynamic linker won't relocate. */
5138 if ((sec->flags & SEC_ALLOC) == 0)
5139 return TRUE;
5140
5141 BFD_ASSERT (is_ppc64_elf (abfd));
5142
5143 htab = ppc_hash_table (info);
5144 if (htab == NULL)
5145 return FALSE;
5146
5147 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5148 FALSE, FALSE, TRUE);
5149 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5150 FALSE, FALSE, TRUE);
5151 symtab_hdr = &elf_symtab_hdr (abfd);
5152 sym_hashes = elf_sym_hashes (abfd);
5153 sreloc = NULL;
5154 opd_sym_map = NULL;
5155 if (strcmp (sec->name, ".opd") == 0)
5156 {
5157 /* Garbage collection needs some extra help with .opd sections.
5158 We don't want to necessarily keep everything referenced by
5159 relocs in .opd, as that would keep all functions. Instead,
5160 if we reference an .opd symbol (a function descriptor), we
5161 want to keep the function code symbol's section. This is
5162 easy for global symbols, but for local syms we need to keep
5163 information about the associated function section. */
5164 bfd_size_type amt;
5165
5166 if (abiversion (abfd) == 0)
5167 set_abiversion (abfd, 1);
5168 else if (abiversion (abfd) == 2)
5169 {
5170 info->callbacks->einfo (_("%P: .opd not allowed in ABI version %d\n"),
5171 abiversion (abfd));
5172 bfd_set_error (bfd_error_bad_value);
5173 return FALSE;
5174 }
5175 amt = sec->size * sizeof (*opd_sym_map) / 8;
5176 opd_sym_map = bfd_zalloc (abfd, amt);
5177 if (opd_sym_map == NULL)
5178 return FALSE;
5179 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
5180 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
5181 ppc64_elf_section_data (sec)->sec_type = sec_opd;
5182 }
5183
5184 rel_end = relocs + sec->reloc_count;
5185 for (rel = relocs; rel < rel_end; rel++)
5186 {
5187 unsigned long r_symndx;
5188 struct elf_link_hash_entry *h;
5189 enum elf_ppc64_reloc_type r_type;
5190 int tls_type;
5191 struct _ppc64_elf_section_data *ppc64_sec;
5192 struct plt_entry **ifunc;
5193
5194 r_symndx = ELF64_R_SYM (rel->r_info);
5195 if (r_symndx < symtab_hdr->sh_info)
5196 h = NULL;
5197 else
5198 {
5199 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5200 h = elf_follow_link (h);
5201
5202 /* PR15323, ref flags aren't set for references in the same
5203 object. */
5204 h->root.non_ir_ref = 1;
5205
5206 if (h == htab->elf.hgot)
5207 sec->has_toc_reloc = 1;
5208 }
5209
5210 tls_type = 0;
5211 ifunc = NULL;
5212 if (h != NULL)
5213 {
5214 if (h->type == STT_GNU_IFUNC)
5215 {
5216 h->needs_plt = 1;
5217 ifunc = &h->plt.plist;
5218 }
5219 }
5220 else
5221 {
5222 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5223 abfd, r_symndx);
5224 if (isym == NULL)
5225 return FALSE;
5226
5227 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5228 {
5229 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5230 rel->r_addend, PLT_IFUNC);
5231 if (ifunc == NULL)
5232 return FALSE;
5233 }
5234 }
5235 r_type = ELF64_R_TYPE (rel->r_info);
5236 if (is_branch_reloc (r_type))
5237 {
5238 if (h != NULL && (h == tga || h == dottga))
5239 {
5240 if (rel != relocs
5241 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5242 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5243 /* We have a new-style __tls_get_addr call with a marker
5244 reloc. */
5245 ;
5246 else
5247 /* Mark this section as having an old-style call. */
5248 sec->has_tls_get_addr_call = 1;
5249 }
5250
5251 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5252 if (ifunc != NULL
5253 && !update_plt_info (abfd, ifunc, rel->r_addend))
5254 return FALSE;
5255 }
5256
5257 switch (r_type)
5258 {
5259 case R_PPC64_TLSGD:
5260 case R_PPC64_TLSLD:
5261 /* These special tls relocs tie a call to __tls_get_addr with
5262 its parameter symbol. */
5263 break;
5264
5265 case R_PPC64_GOT_TLSLD16:
5266 case R_PPC64_GOT_TLSLD16_LO:
5267 case R_PPC64_GOT_TLSLD16_HI:
5268 case R_PPC64_GOT_TLSLD16_HA:
5269 tls_type = TLS_TLS | TLS_LD;
5270 goto dogottls;
5271
5272 case R_PPC64_GOT_TLSGD16:
5273 case R_PPC64_GOT_TLSGD16_LO:
5274 case R_PPC64_GOT_TLSGD16_HI:
5275 case R_PPC64_GOT_TLSGD16_HA:
5276 tls_type = TLS_TLS | TLS_GD;
5277 goto dogottls;
5278
5279 case R_PPC64_GOT_TPREL16_DS:
5280 case R_PPC64_GOT_TPREL16_LO_DS:
5281 case R_PPC64_GOT_TPREL16_HI:
5282 case R_PPC64_GOT_TPREL16_HA:
5283 if (!info->executable)
5284 info->flags |= DF_STATIC_TLS;
5285 tls_type = TLS_TLS | TLS_TPREL;
5286 goto dogottls;
5287
5288 case R_PPC64_GOT_DTPREL16_DS:
5289 case R_PPC64_GOT_DTPREL16_LO_DS:
5290 case R_PPC64_GOT_DTPREL16_HI:
5291 case R_PPC64_GOT_DTPREL16_HA:
5292 tls_type = TLS_TLS | TLS_DTPREL;
5293 dogottls:
5294 sec->has_tls_reloc = 1;
5295 /* Fall thru */
5296
5297 case R_PPC64_GOT16:
5298 case R_PPC64_GOT16_DS:
5299 case R_PPC64_GOT16_HA:
5300 case R_PPC64_GOT16_HI:
5301 case R_PPC64_GOT16_LO:
5302 case R_PPC64_GOT16_LO_DS:
5303 /* This symbol requires a global offset table entry. */
5304 sec->has_toc_reloc = 1;
5305 if (r_type == R_PPC64_GOT_TLSLD16
5306 || r_type == R_PPC64_GOT_TLSGD16
5307 || r_type == R_PPC64_GOT_TPREL16_DS
5308 || r_type == R_PPC64_GOT_DTPREL16_DS
5309 || r_type == R_PPC64_GOT16
5310 || r_type == R_PPC64_GOT16_DS)
5311 {
5312 htab->do_multi_toc = 1;
5313 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5314 }
5315
5316 if (ppc64_elf_tdata (abfd)->got == NULL
5317 && !create_got_section (abfd, info))
5318 return FALSE;
5319
5320 if (h != NULL)
5321 {
5322 struct ppc_link_hash_entry *eh;
5323 struct got_entry *ent;
5324
5325 eh = (struct ppc_link_hash_entry *) h;
5326 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5327 if (ent->addend == rel->r_addend
5328 && ent->owner == abfd
5329 && ent->tls_type == tls_type)
5330 break;
5331 if (ent == NULL)
5332 {
5333 bfd_size_type amt = sizeof (*ent);
5334 ent = bfd_alloc (abfd, amt);
5335 if (ent == NULL)
5336 return FALSE;
5337 ent->next = eh->elf.got.glist;
5338 ent->addend = rel->r_addend;
5339 ent->owner = abfd;
5340 ent->tls_type = tls_type;
5341 ent->is_indirect = FALSE;
5342 ent->got.refcount = 0;
5343 eh->elf.got.glist = ent;
5344 }
5345 ent->got.refcount += 1;
5346 eh->tls_mask |= tls_type;
5347 }
5348 else
5349 /* This is a global offset table entry for a local symbol. */
5350 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5351 rel->r_addend, tls_type))
5352 return FALSE;
5353
5354 /* We may also need a plt entry if the symbol turns out to be
5355 an ifunc. */
5356 if (h != NULL && !info->shared && abiversion (abfd) == 2)
5357 {
5358 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5359 return FALSE;
5360 }
5361 break;
5362
5363 case R_PPC64_PLT16_HA:
5364 case R_PPC64_PLT16_HI:
5365 case R_PPC64_PLT16_LO:
5366 case R_PPC64_PLT32:
5367 case R_PPC64_PLT64:
5368 /* This symbol requires a procedure linkage table entry. We
5369 actually build the entry in adjust_dynamic_symbol,
5370 because this might be a case of linking PIC code without
5371 linking in any dynamic objects, in which case we don't
5372 need to generate a procedure linkage table after all. */
5373 if (h == NULL)
5374 {
5375 /* It does not make sense to have a procedure linkage
5376 table entry for a local symbol. */
5377 bfd_set_error (bfd_error_bad_value);
5378 return FALSE;
5379 }
5380 else
5381 {
5382 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5383 return FALSE;
5384 h->needs_plt = 1;
5385 if (h->root.root.string[0] == '.'
5386 && h->root.root.string[1] != '\0')
5387 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5388 }
5389 break;
5390
5391 /* The following relocations don't need to propagate the
5392 relocation if linking a shared object since they are
5393 section relative. */
5394 case R_PPC64_SECTOFF:
5395 case R_PPC64_SECTOFF_LO:
5396 case R_PPC64_SECTOFF_HI:
5397 case R_PPC64_SECTOFF_HA:
5398 case R_PPC64_SECTOFF_DS:
5399 case R_PPC64_SECTOFF_LO_DS:
5400 case R_PPC64_DTPREL16:
5401 case R_PPC64_DTPREL16_LO:
5402 case R_PPC64_DTPREL16_HI:
5403 case R_PPC64_DTPREL16_HA:
5404 case R_PPC64_DTPREL16_DS:
5405 case R_PPC64_DTPREL16_LO_DS:
5406 case R_PPC64_DTPREL16_HIGH:
5407 case R_PPC64_DTPREL16_HIGHA:
5408 case R_PPC64_DTPREL16_HIGHER:
5409 case R_PPC64_DTPREL16_HIGHERA:
5410 case R_PPC64_DTPREL16_HIGHEST:
5411 case R_PPC64_DTPREL16_HIGHESTA:
5412 break;
5413
5414 /* Nor do these. */
5415 case R_PPC64_REL16:
5416 case R_PPC64_REL16_LO:
5417 case R_PPC64_REL16_HI:
5418 case R_PPC64_REL16_HA:
5419 break;
5420
5421 case R_PPC64_TOC16:
5422 case R_PPC64_TOC16_DS:
5423 htab->do_multi_toc = 1;
5424 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5425 case R_PPC64_TOC16_LO:
5426 case R_PPC64_TOC16_HI:
5427 case R_PPC64_TOC16_HA:
5428 case R_PPC64_TOC16_LO_DS:
5429 sec->has_toc_reloc = 1;
5430 break;
5431
5432 /* This relocation describes the C++ object vtable hierarchy.
5433 Reconstruct it for later use during GC. */
5434 case R_PPC64_GNU_VTINHERIT:
5435 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5436 return FALSE;
5437 break;
5438
5439 /* This relocation describes which C++ vtable entries are actually
5440 used. Record for later use during GC. */
5441 case R_PPC64_GNU_VTENTRY:
5442 BFD_ASSERT (h != NULL);
5443 if (h != NULL
5444 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5445 return FALSE;
5446 break;
5447
5448 case R_PPC64_REL14:
5449 case R_PPC64_REL14_BRTAKEN:
5450 case R_PPC64_REL14_BRNTAKEN:
5451 {
5452 asection *dest = NULL;
5453
5454 /* Heuristic: If jumping outside our section, chances are
5455 we are going to need a stub. */
5456 if (h != NULL)
5457 {
5458 /* If the sym is weak it may be overridden later, so
5459 don't assume we know where a weak sym lives. */
5460 if (h->root.type == bfd_link_hash_defined)
5461 dest = h->root.u.def.section;
5462 }
5463 else
5464 {
5465 Elf_Internal_Sym *isym;
5466
5467 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5468 abfd, r_symndx);
5469 if (isym == NULL)
5470 return FALSE;
5471
5472 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5473 }
5474
5475 if (dest != sec)
5476 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5477 }
5478 /* Fall through. */
5479
5480 case R_PPC64_REL24:
5481 if (h != NULL && ifunc == NULL)
5482 {
5483 /* We may need a .plt entry if the function this reloc
5484 refers to is in a shared lib. */
5485 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5486 return FALSE;
5487 h->needs_plt = 1;
5488 if (h->root.root.string[0] == '.'
5489 && h->root.root.string[1] != '\0')
5490 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5491 if (h == tga || h == dottga)
5492 sec->has_tls_reloc = 1;
5493 }
5494 break;
5495
5496 case R_PPC64_TPREL64:
5497 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5498 if (!info->executable)
5499 info->flags |= DF_STATIC_TLS;
5500 goto dotlstoc;
5501
5502 case R_PPC64_DTPMOD64:
5503 if (rel + 1 < rel_end
5504 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5505 && rel[1].r_offset == rel->r_offset + 8)
5506 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5507 else
5508 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5509 goto dotlstoc;
5510
5511 case R_PPC64_DTPREL64:
5512 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5513 if (rel != relocs
5514 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5515 && rel[-1].r_offset == rel->r_offset - 8)
5516 /* This is the second reloc of a dtpmod, dtprel pair.
5517 Don't mark with TLS_DTPREL. */
5518 goto dodyn;
5519
5520 dotlstoc:
5521 sec->has_tls_reloc = 1;
5522 if (h != NULL)
5523 {
5524 struct ppc_link_hash_entry *eh;
5525 eh = (struct ppc_link_hash_entry *) h;
5526 eh->tls_mask |= tls_type;
5527 }
5528 else
5529 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5530 rel->r_addend, tls_type))
5531 return FALSE;
5532
5533 ppc64_sec = ppc64_elf_section_data (sec);
5534 if (ppc64_sec->sec_type != sec_toc)
5535 {
5536 bfd_size_type amt;
5537
5538 /* One extra to simplify get_tls_mask. */
5539 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5540 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5541 if (ppc64_sec->u.toc.symndx == NULL)
5542 return FALSE;
5543 amt = sec->size * sizeof (bfd_vma) / 8;
5544 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5545 if (ppc64_sec->u.toc.add == NULL)
5546 return FALSE;
5547 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5548 ppc64_sec->sec_type = sec_toc;
5549 }
5550 BFD_ASSERT (rel->r_offset % 8 == 0);
5551 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5552 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5553
5554 /* Mark the second slot of a GD or LD entry.
5555 -1 to indicate GD and -2 to indicate LD. */
5556 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5557 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5558 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5559 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5560 goto dodyn;
5561
5562 case R_PPC64_TPREL16:
5563 case R_PPC64_TPREL16_LO:
5564 case R_PPC64_TPREL16_HI:
5565 case R_PPC64_TPREL16_HA:
5566 case R_PPC64_TPREL16_DS:
5567 case R_PPC64_TPREL16_LO_DS:
5568 case R_PPC64_TPREL16_HIGH:
5569 case R_PPC64_TPREL16_HIGHA:
5570 case R_PPC64_TPREL16_HIGHER:
5571 case R_PPC64_TPREL16_HIGHERA:
5572 case R_PPC64_TPREL16_HIGHEST:
5573 case R_PPC64_TPREL16_HIGHESTA:
5574 if (info->shared)
5575 {
5576 if (!info->executable)
5577 info->flags |= DF_STATIC_TLS;
5578 goto dodyn;
5579 }
5580 break;
5581
5582 case R_PPC64_ADDR64:
5583 if (opd_sym_map != NULL
5584 && rel + 1 < rel_end
5585 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5586 {
5587 if (h != NULL)
5588 {
5589 if (h->root.root.string[0] == '.'
5590 && h->root.root.string[1] != 0
5591 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5592 ;
5593 else
5594 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5595 }
5596 else
5597 {
5598 asection *s;
5599 Elf_Internal_Sym *isym;
5600
5601 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5602 abfd, r_symndx);
5603 if (isym == NULL)
5604 return FALSE;
5605
5606 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5607 if (s != NULL && s != sec)
5608 opd_sym_map[rel->r_offset / 8] = s;
5609 }
5610 }
5611 /* Fall through. */
5612
5613 case R_PPC64_ADDR16:
5614 case R_PPC64_ADDR16_DS:
5615 case R_PPC64_ADDR16_HA:
5616 case R_PPC64_ADDR16_HI:
5617 case R_PPC64_ADDR16_HIGH:
5618 case R_PPC64_ADDR16_HIGHA:
5619 case R_PPC64_ADDR16_HIGHER:
5620 case R_PPC64_ADDR16_HIGHERA:
5621 case R_PPC64_ADDR16_HIGHEST:
5622 case R_PPC64_ADDR16_HIGHESTA:
5623 case R_PPC64_ADDR16_LO:
5624 case R_PPC64_ADDR16_LO_DS:
5625 if (h != NULL && !info->shared && abiversion (abfd) == 2
5626 && rel->r_addend == 0)
5627 {
5628 /* We may need a .plt entry if this reloc refers to a
5629 function in a shared lib. */
5630 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5631 return FALSE;
5632 h->pointer_equality_needed = 1;
5633 }
5634 /* Fall through. */
5635
5636 case R_PPC64_REL30:
5637 case R_PPC64_REL32:
5638 case R_PPC64_REL64:
5639 case R_PPC64_ADDR14:
5640 case R_PPC64_ADDR14_BRNTAKEN:
5641 case R_PPC64_ADDR14_BRTAKEN:
5642 case R_PPC64_ADDR24:
5643 case R_PPC64_ADDR32:
5644 case R_PPC64_UADDR16:
5645 case R_PPC64_UADDR32:
5646 case R_PPC64_UADDR64:
5647 case R_PPC64_TOC:
5648 if (h != NULL && !info->shared)
5649 /* We may need a copy reloc. */
5650 h->non_got_ref = 1;
5651
5652 /* Don't propagate .opd relocs. */
5653 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5654 break;
5655
5656 /* If we are creating a shared library, and this is a reloc
5657 against a global symbol, or a non PC relative reloc
5658 against a local symbol, then we need to copy the reloc
5659 into the shared library. However, if we are linking with
5660 -Bsymbolic, we do not need to copy a reloc against a
5661 global symbol which is defined in an object we are
5662 including in the link (i.e., DEF_REGULAR is set). At
5663 this point we have not seen all the input files, so it is
5664 possible that DEF_REGULAR is not set now but will be set
5665 later (it is never cleared). In case of a weak definition,
5666 DEF_REGULAR may be cleared later by a strong definition in
5667 a shared library. We account for that possibility below by
5668 storing information in the dyn_relocs field of the hash
5669 table entry. A similar situation occurs when creating
5670 shared libraries and symbol visibility changes render the
5671 symbol local.
5672
5673 If on the other hand, we are creating an executable, we
5674 may need to keep relocations for symbols satisfied by a
5675 dynamic library if we manage to avoid copy relocs for the
5676 symbol. */
5677 dodyn:
5678 if ((info->shared
5679 && (must_be_dyn_reloc (info, r_type)
5680 || (h != NULL
5681 && (!SYMBOLIC_BIND (info, h)
5682 || h->root.type == bfd_link_hash_defweak
5683 || !h->def_regular))))
5684 || (ELIMINATE_COPY_RELOCS
5685 && !info->shared
5686 && h != NULL
5687 && (h->root.type == bfd_link_hash_defweak
5688 || !h->def_regular))
5689 || (!info->shared
5690 && ifunc != NULL))
5691 {
5692 /* We must copy these reloc types into the output file.
5693 Create a reloc section in dynobj and make room for
5694 this reloc. */
5695 if (sreloc == NULL)
5696 {
5697 sreloc = _bfd_elf_make_dynamic_reloc_section
5698 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5699
5700 if (sreloc == NULL)
5701 return FALSE;
5702 }
5703
5704 /* If this is a global symbol, we count the number of
5705 relocations we need for this symbol. */
5706 if (h != NULL)
5707 {
5708 struct elf_dyn_relocs *p;
5709 struct elf_dyn_relocs **head;
5710
5711 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5712 p = *head;
5713 if (p == NULL || p->sec != sec)
5714 {
5715 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5716 if (p == NULL)
5717 return FALSE;
5718 p->next = *head;
5719 *head = p;
5720 p->sec = sec;
5721 p->count = 0;
5722 p->pc_count = 0;
5723 }
5724 p->count += 1;
5725 if (!must_be_dyn_reloc (info, r_type))
5726 p->pc_count += 1;
5727 }
5728 else
5729 {
5730 /* Track dynamic relocs needed for local syms too.
5731 We really need local syms available to do this
5732 easily. Oh well. */
5733 struct ppc_dyn_relocs *p;
5734 struct ppc_dyn_relocs **head;
5735 bfd_boolean is_ifunc;
5736 asection *s;
5737 void *vpp;
5738 Elf_Internal_Sym *isym;
5739
5740 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5741 abfd, r_symndx);
5742 if (isym == NULL)
5743 return FALSE;
5744
5745 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5746 if (s == NULL)
5747 s = sec;
5748
5749 vpp = &elf_section_data (s)->local_dynrel;
5750 head = (struct ppc_dyn_relocs **) vpp;
5751 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5752 p = *head;
5753 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5754 p = p->next;
5755 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5756 {
5757 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5758 if (p == NULL)
5759 return FALSE;
5760 p->next = *head;
5761 *head = p;
5762 p->sec = sec;
5763 p->ifunc = is_ifunc;
5764 p->count = 0;
5765 }
5766 p->count += 1;
5767 }
5768 }
5769 break;
5770
5771 default:
5772 break;
5773 }
5774 }
5775
5776 return TRUE;
5777 }
5778
5779 /* Merge backend specific data from an object file to the output
5780 object file when linking. */
5781
5782 static bfd_boolean
5783 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5784 {
5785 unsigned long iflags, oflags;
5786
5787 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5788 return TRUE;
5789
5790 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5791 return TRUE;
5792
5793 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5794 return FALSE;
5795
5796 iflags = elf_elfheader (ibfd)->e_flags;
5797 oflags = elf_elfheader (obfd)->e_flags;
5798
5799 if (!elf_flags_init (obfd) || oflags == 0)
5800 {
5801 elf_flags_init (obfd) = TRUE;
5802 elf_elfheader (obfd)->e_flags = iflags;
5803 }
5804 else if (iflags == oflags || iflags == 0)
5805 ;
5806 else if (iflags & ~EF_PPC64_ABI)
5807 {
5808 (*_bfd_error_handler)
5809 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5810 bfd_set_error (bfd_error_bad_value);
5811 return FALSE;
5812 }
5813 else
5814 {
5815 (*_bfd_error_handler)
5816 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5817 ibfd, iflags, oflags);
5818 bfd_set_error (bfd_error_bad_value);
5819 return FALSE;
5820 }
5821
5822 /* Merge Tag_compatibility attributes and any common GNU ones. */
5823 _bfd_elf_merge_object_attributes (ibfd, obfd);
5824
5825 return TRUE;
5826 }
5827
5828 static bfd_boolean
5829 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5830 {
5831 /* Print normal ELF private data. */
5832 _bfd_elf_print_private_bfd_data (abfd, ptr);
5833
5834 if (elf_elfheader (abfd)->e_flags != 0)
5835 {
5836 FILE *file = ptr;
5837
5838 /* xgettext:c-format */
5839 fprintf (file, _("private flags = 0x%lx:"),
5840 elf_elfheader (abfd)->e_flags);
5841
5842 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5843 fprintf (file, _(" [abiv%ld]"),
5844 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5845 fputc ('\n', file);
5846 }
5847
5848 return TRUE;
5849 }
5850
5851 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5852 of the code entry point, and its section. */
5853
5854 static bfd_vma
5855 opd_entry_value (asection *opd_sec,
5856 bfd_vma offset,
5857 asection **code_sec,
5858 bfd_vma *code_off,
5859 bfd_boolean in_code_sec)
5860 {
5861 bfd *opd_bfd = opd_sec->owner;
5862 Elf_Internal_Rela *relocs;
5863 Elf_Internal_Rela *lo, *hi, *look;
5864 bfd_vma val;
5865
5866 /* No relocs implies we are linking a --just-symbols object, or looking
5867 at a final linked executable with addr2line or somesuch. */
5868 if (opd_sec->reloc_count == 0)
5869 {
5870 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5871
5872 if (contents == NULL)
5873 {
5874 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5875 return (bfd_vma) -1;
5876 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5877 }
5878
5879 val = bfd_get_64 (opd_bfd, contents + offset);
5880 if (code_sec != NULL)
5881 {
5882 asection *sec, *likely = NULL;
5883
5884 if (in_code_sec)
5885 {
5886 sec = *code_sec;
5887 if (sec->vma <= val
5888 && val < sec->vma + sec->size)
5889 likely = sec;
5890 else
5891 val = -1;
5892 }
5893 else
5894 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5895 if (sec->vma <= val
5896 && (sec->flags & SEC_LOAD) != 0
5897 && (sec->flags & SEC_ALLOC) != 0)
5898 likely = sec;
5899 if (likely != NULL)
5900 {
5901 *code_sec = likely;
5902 if (code_off != NULL)
5903 *code_off = val - likely->vma;
5904 }
5905 }
5906 return val;
5907 }
5908
5909 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5910
5911 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5912 if (relocs == NULL)
5913 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5914
5915 /* Go find the opd reloc at the sym address. */
5916 lo = relocs;
5917 BFD_ASSERT (lo != NULL);
5918 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5919 val = (bfd_vma) -1;
5920 while (lo < hi)
5921 {
5922 look = lo + (hi - lo) / 2;
5923 if (look->r_offset < offset)
5924 lo = look + 1;
5925 else if (look->r_offset > offset)
5926 hi = look;
5927 else
5928 {
5929 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5930
5931 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5932 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5933 {
5934 unsigned long symndx = ELF64_R_SYM (look->r_info);
5935 asection *sec;
5936
5937 if (symndx < symtab_hdr->sh_info
5938 || elf_sym_hashes (opd_bfd) == NULL)
5939 {
5940 Elf_Internal_Sym *sym;
5941
5942 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5943 if (sym == NULL)
5944 {
5945 size_t symcnt = symtab_hdr->sh_info;
5946 if (elf_sym_hashes (opd_bfd) == NULL)
5947 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5948 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5949 0, NULL, NULL, NULL);
5950 if (sym == NULL)
5951 break;
5952 symtab_hdr->contents = (bfd_byte *) sym;
5953 }
5954
5955 sym += symndx;
5956 val = sym->st_value;
5957 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5958 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5959 }
5960 else
5961 {
5962 struct elf_link_hash_entry **sym_hashes;
5963 struct elf_link_hash_entry *rh;
5964
5965 sym_hashes = elf_sym_hashes (opd_bfd);
5966 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5967 if (rh != NULL)
5968 {
5969 rh = elf_follow_link (rh);
5970 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5971 || rh->root.type == bfd_link_hash_defweak);
5972 val = rh->root.u.def.value;
5973 sec = rh->root.u.def.section;
5974 }
5975 else
5976 {
5977 /* Handle the odd case where we can be called
5978 during bfd_elf_link_add_symbols before the
5979 symbol hashes have been fully populated. */
5980 Elf_Internal_Sym *sym;
5981
5982 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5983 symndx, NULL, NULL, NULL);
5984 if (sym == NULL)
5985 break;
5986
5987 val = sym->st_value;
5988 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5989 free (sym);
5990 }
5991 }
5992 val += look->r_addend;
5993 if (code_off != NULL)
5994 *code_off = val;
5995 if (code_sec != NULL)
5996 {
5997 if (in_code_sec && *code_sec != sec)
5998 return -1;
5999 else
6000 *code_sec = sec;
6001 }
6002 if (sec != NULL && sec->output_section != NULL)
6003 val += sec->output_section->vma + sec->output_offset;
6004 }
6005 break;
6006 }
6007 }
6008
6009 return val;
6010 }
6011
6012 /* If the ELF symbol SYM might be a function in SEC, return the
6013 function size and set *CODE_OFF to the function's entry point,
6014 otherwise return zero. */
6015
6016 static bfd_size_type
6017 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6018 bfd_vma *code_off)
6019 {
6020 bfd_size_type size;
6021
6022 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6023 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6024 return 0;
6025
6026 size = 0;
6027 if (!(sym->flags & BSF_SYNTHETIC))
6028 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6029
6030 if (strcmp (sym->section->name, ".opd") == 0)
6031 {
6032 if (opd_entry_value (sym->section, sym->value,
6033 &sec, code_off, TRUE) == (bfd_vma) -1)
6034 return 0;
6035 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6036 symbol. This size has nothing to do with the code size of the
6037 function, which is what we're supposed to return, but the
6038 code size isn't available without looking up the dot-sym.
6039 However, doing that would be a waste of time particularly
6040 since elf_find_function will look at the dot-sym anyway.
6041 Now, elf_find_function will keep the largest size of any
6042 function sym found at the code address of interest, so return
6043 1 here to avoid it incorrectly caching a larger function size
6044 for a small function. This does mean we return the wrong
6045 size for a new-ABI function of size 24, but all that does is
6046 disable caching for such functions. */
6047 if (size == 24)
6048 size = 1;
6049 }
6050 else
6051 {
6052 if (sym->section != sec)
6053 return 0;
6054 *code_off = sym->value;
6055 }
6056 if (size == 0)
6057 size = 1;
6058 return size;
6059 }
6060
6061 /* Return true if symbol is defined in a regular object file. */
6062
6063 static bfd_boolean
6064 is_static_defined (struct elf_link_hash_entry *h)
6065 {
6066 return ((h->root.type == bfd_link_hash_defined
6067 || h->root.type == bfd_link_hash_defweak)
6068 && h->root.u.def.section != NULL
6069 && h->root.u.def.section->output_section != NULL);
6070 }
6071
6072 /* If FDH is a function descriptor symbol, return the associated code
6073 entry symbol if it is defined. Return NULL otherwise. */
6074
6075 static struct ppc_link_hash_entry *
6076 defined_code_entry (struct ppc_link_hash_entry *fdh)
6077 {
6078 if (fdh->is_func_descriptor)
6079 {
6080 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6081 if (fh->elf.root.type == bfd_link_hash_defined
6082 || fh->elf.root.type == bfd_link_hash_defweak)
6083 return fh;
6084 }
6085 return NULL;
6086 }
6087
6088 /* If FH is a function code entry symbol, return the associated
6089 function descriptor symbol if it is defined. Return NULL otherwise. */
6090
6091 static struct ppc_link_hash_entry *
6092 defined_func_desc (struct ppc_link_hash_entry *fh)
6093 {
6094 if (fh->oh != NULL
6095 && fh->oh->is_func_descriptor)
6096 {
6097 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6098 if (fdh->elf.root.type == bfd_link_hash_defined
6099 || fdh->elf.root.type == bfd_link_hash_defweak)
6100 return fdh;
6101 }
6102 return NULL;
6103 }
6104
6105 /* Mark all our entry sym sections, both opd and code section. */
6106
6107 static void
6108 ppc64_elf_gc_keep (struct bfd_link_info *info)
6109 {
6110 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6111 struct bfd_sym_chain *sym;
6112
6113 if (htab == NULL)
6114 return;
6115
6116 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6117 {
6118 struct ppc_link_hash_entry *eh, *fh;
6119 asection *sec;
6120
6121 eh = (struct ppc_link_hash_entry *)
6122 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6123 if (eh == NULL)
6124 continue;
6125 if (eh->elf.root.type != bfd_link_hash_defined
6126 && eh->elf.root.type != bfd_link_hash_defweak)
6127 continue;
6128
6129 fh = defined_code_entry (eh);
6130 if (fh != NULL)
6131 {
6132 sec = fh->elf.root.u.def.section;
6133 sec->flags |= SEC_KEEP;
6134 }
6135 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6136 && opd_entry_value (eh->elf.root.u.def.section,
6137 eh->elf.root.u.def.value,
6138 &sec, NULL, FALSE) != (bfd_vma) -1)
6139 sec->flags |= SEC_KEEP;
6140
6141 sec = eh->elf.root.u.def.section;
6142 sec->flags |= SEC_KEEP;
6143 }
6144 }
6145
6146 /* Mark sections containing dynamically referenced symbols. When
6147 building shared libraries, we must assume that any visible symbol is
6148 referenced. */
6149
6150 static bfd_boolean
6151 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6152 {
6153 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6154 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6155 struct ppc_link_hash_entry *fdh;
6156 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6157
6158 /* Dynamic linking info is on the func descriptor sym. */
6159 fdh = defined_func_desc (eh);
6160 if (fdh != NULL)
6161 eh = fdh;
6162
6163 if ((eh->elf.root.type == bfd_link_hash_defined
6164 || eh->elf.root.type == bfd_link_hash_defweak)
6165 && (eh->elf.ref_dynamic
6166 || (eh->elf.def_regular
6167 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6168 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6169 && (!info->executable
6170 || info->export_dynamic
6171 || (eh->elf.dynamic
6172 && d != NULL
6173 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6174 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6175 || !bfd_hide_sym_by_version (info->version_info,
6176 eh->elf.root.root.string)))))
6177 {
6178 asection *code_sec;
6179 struct ppc_link_hash_entry *fh;
6180
6181 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6182
6183 /* Function descriptor syms cause the associated
6184 function code sym section to be marked. */
6185 fh = defined_code_entry (eh);
6186 if (fh != NULL)
6187 {
6188 code_sec = fh->elf.root.u.def.section;
6189 code_sec->flags |= SEC_KEEP;
6190 }
6191 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6192 && opd_entry_value (eh->elf.root.u.def.section,
6193 eh->elf.root.u.def.value,
6194 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6195 code_sec->flags |= SEC_KEEP;
6196 }
6197
6198 return TRUE;
6199 }
6200
6201 /* Return the section that should be marked against GC for a given
6202 relocation. */
6203
6204 static asection *
6205 ppc64_elf_gc_mark_hook (asection *sec,
6206 struct bfd_link_info *info,
6207 Elf_Internal_Rela *rel,
6208 struct elf_link_hash_entry *h,
6209 Elf_Internal_Sym *sym)
6210 {
6211 asection *rsec;
6212
6213 /* Syms return NULL if we're marking .opd, so we avoid marking all
6214 function sections, as all functions are referenced in .opd. */
6215 rsec = NULL;
6216 if (get_opd_info (sec) != NULL)
6217 return rsec;
6218
6219 if (h != NULL)
6220 {
6221 enum elf_ppc64_reloc_type r_type;
6222 struct ppc_link_hash_entry *eh, *fh, *fdh;
6223
6224 r_type = ELF64_R_TYPE (rel->r_info);
6225 switch (r_type)
6226 {
6227 case R_PPC64_GNU_VTINHERIT:
6228 case R_PPC64_GNU_VTENTRY:
6229 break;
6230
6231 default:
6232 switch (h->root.type)
6233 {
6234 case bfd_link_hash_defined:
6235 case bfd_link_hash_defweak:
6236 eh = (struct ppc_link_hash_entry *) h;
6237 fdh = defined_func_desc (eh);
6238 if (fdh != NULL)
6239 eh = fdh;
6240
6241 /* Function descriptor syms cause the associated
6242 function code sym section to be marked. */
6243 fh = defined_code_entry (eh);
6244 if (fh != NULL)
6245 {
6246 /* They also mark their opd section. */
6247 eh->elf.root.u.def.section->gc_mark = 1;
6248
6249 rsec = fh->elf.root.u.def.section;
6250 }
6251 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6252 && opd_entry_value (eh->elf.root.u.def.section,
6253 eh->elf.root.u.def.value,
6254 &rsec, NULL, FALSE) != (bfd_vma) -1)
6255 eh->elf.root.u.def.section->gc_mark = 1;
6256 else
6257 rsec = h->root.u.def.section;
6258 break;
6259
6260 case bfd_link_hash_common:
6261 rsec = h->root.u.c.p->section;
6262 break;
6263
6264 default:
6265 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6266 }
6267 }
6268 }
6269 else
6270 {
6271 struct _opd_sec_data *opd;
6272
6273 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6274 opd = get_opd_info (rsec);
6275 if (opd != NULL && opd->func_sec != NULL)
6276 {
6277 rsec->gc_mark = 1;
6278
6279 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6280 }
6281 }
6282
6283 return rsec;
6284 }
6285
6286 /* Update the .got, .plt. and dynamic reloc reference counts for the
6287 section being removed. */
6288
6289 static bfd_boolean
6290 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6291 asection *sec, const Elf_Internal_Rela *relocs)
6292 {
6293 struct ppc_link_hash_table *htab;
6294 Elf_Internal_Shdr *symtab_hdr;
6295 struct elf_link_hash_entry **sym_hashes;
6296 struct got_entry **local_got_ents;
6297 const Elf_Internal_Rela *rel, *relend;
6298
6299 if (info->relocatable)
6300 return TRUE;
6301
6302 if ((sec->flags & SEC_ALLOC) == 0)
6303 return TRUE;
6304
6305 elf_section_data (sec)->local_dynrel = NULL;
6306
6307 htab = ppc_hash_table (info);
6308 if (htab == NULL)
6309 return FALSE;
6310
6311 symtab_hdr = &elf_symtab_hdr (abfd);
6312 sym_hashes = elf_sym_hashes (abfd);
6313 local_got_ents = elf_local_got_ents (abfd);
6314
6315 relend = relocs + sec->reloc_count;
6316 for (rel = relocs; rel < relend; rel++)
6317 {
6318 unsigned long r_symndx;
6319 enum elf_ppc64_reloc_type r_type;
6320 struct elf_link_hash_entry *h = NULL;
6321 unsigned char tls_type = 0;
6322
6323 r_symndx = ELF64_R_SYM (rel->r_info);
6324 r_type = ELF64_R_TYPE (rel->r_info);
6325 if (r_symndx >= symtab_hdr->sh_info)
6326 {
6327 struct ppc_link_hash_entry *eh;
6328 struct elf_dyn_relocs **pp;
6329 struct elf_dyn_relocs *p;
6330
6331 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6332 h = elf_follow_link (h);
6333 eh = (struct ppc_link_hash_entry *) h;
6334
6335 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6336 if (p->sec == sec)
6337 {
6338 /* Everything must go for SEC. */
6339 *pp = p->next;
6340 break;
6341 }
6342 }
6343
6344 if (is_branch_reloc (r_type))
6345 {
6346 struct plt_entry **ifunc = NULL;
6347 if (h != NULL)
6348 {
6349 if (h->type == STT_GNU_IFUNC)
6350 ifunc = &h->plt.plist;
6351 }
6352 else if (local_got_ents != NULL)
6353 {
6354 struct plt_entry **local_plt = (struct plt_entry **)
6355 (local_got_ents + symtab_hdr->sh_info);
6356 unsigned char *local_got_tls_masks = (unsigned char *)
6357 (local_plt + symtab_hdr->sh_info);
6358 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6359 ifunc = local_plt + r_symndx;
6360 }
6361 if (ifunc != NULL)
6362 {
6363 struct plt_entry *ent;
6364
6365 for (ent = *ifunc; ent != NULL; ent = ent->next)
6366 if (ent->addend == rel->r_addend)
6367 break;
6368 if (ent == NULL)
6369 abort ();
6370 if (ent->plt.refcount > 0)
6371 ent->plt.refcount -= 1;
6372 continue;
6373 }
6374 }
6375
6376 switch (r_type)
6377 {
6378 case R_PPC64_GOT_TLSLD16:
6379 case R_PPC64_GOT_TLSLD16_LO:
6380 case R_PPC64_GOT_TLSLD16_HI:
6381 case R_PPC64_GOT_TLSLD16_HA:
6382 tls_type = TLS_TLS | TLS_LD;
6383 goto dogot;
6384
6385 case R_PPC64_GOT_TLSGD16:
6386 case R_PPC64_GOT_TLSGD16_LO:
6387 case R_PPC64_GOT_TLSGD16_HI:
6388 case R_PPC64_GOT_TLSGD16_HA:
6389 tls_type = TLS_TLS | TLS_GD;
6390 goto dogot;
6391
6392 case R_PPC64_GOT_TPREL16_DS:
6393 case R_PPC64_GOT_TPREL16_LO_DS:
6394 case R_PPC64_GOT_TPREL16_HI:
6395 case R_PPC64_GOT_TPREL16_HA:
6396 tls_type = TLS_TLS | TLS_TPREL;
6397 goto dogot;
6398
6399 case R_PPC64_GOT_DTPREL16_DS:
6400 case R_PPC64_GOT_DTPREL16_LO_DS:
6401 case R_PPC64_GOT_DTPREL16_HI:
6402 case R_PPC64_GOT_DTPREL16_HA:
6403 tls_type = TLS_TLS | TLS_DTPREL;
6404 goto dogot;
6405
6406 case R_PPC64_GOT16:
6407 case R_PPC64_GOT16_DS:
6408 case R_PPC64_GOT16_HA:
6409 case R_PPC64_GOT16_HI:
6410 case R_PPC64_GOT16_LO:
6411 case R_PPC64_GOT16_LO_DS:
6412 dogot:
6413 {
6414 struct got_entry *ent;
6415
6416 if (h != NULL)
6417 ent = h->got.glist;
6418 else
6419 ent = local_got_ents[r_symndx];
6420
6421 for (; ent != NULL; ent = ent->next)
6422 if (ent->addend == rel->r_addend
6423 && ent->owner == abfd
6424 && ent->tls_type == tls_type)
6425 break;
6426 if (ent == NULL)
6427 abort ();
6428 if (ent->got.refcount > 0)
6429 ent->got.refcount -= 1;
6430 }
6431 break;
6432
6433 case R_PPC64_PLT16_HA:
6434 case R_PPC64_PLT16_HI:
6435 case R_PPC64_PLT16_LO:
6436 case R_PPC64_PLT32:
6437 case R_PPC64_PLT64:
6438 case R_PPC64_REL14:
6439 case R_PPC64_REL14_BRNTAKEN:
6440 case R_PPC64_REL14_BRTAKEN:
6441 case R_PPC64_REL24:
6442 if (h != NULL)
6443 {
6444 struct plt_entry *ent;
6445
6446 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6447 if (ent->addend == rel->r_addend)
6448 break;
6449 if (ent != NULL && ent->plt.refcount > 0)
6450 ent->plt.refcount -= 1;
6451 }
6452 break;
6453
6454 default:
6455 break;
6456 }
6457 }
6458 return TRUE;
6459 }
6460
6461 /* The maximum size of .sfpr. */
6462 #define SFPR_MAX (218*4)
6463
6464 struct sfpr_def_parms
6465 {
6466 const char name[12];
6467 unsigned char lo, hi;
6468 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6469 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6470 };
6471
6472 /* Auto-generate _save*, _rest* functions in .sfpr. */
6473
6474 static bfd_boolean
6475 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6476 {
6477 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6478 unsigned int i;
6479 size_t len = strlen (parm->name);
6480 bfd_boolean writing = FALSE;
6481 char sym[16];
6482
6483 if (htab == NULL)
6484 return FALSE;
6485
6486 memcpy (sym, parm->name, len);
6487 sym[len + 2] = 0;
6488
6489 for (i = parm->lo; i <= parm->hi; i++)
6490 {
6491 struct elf_link_hash_entry *h;
6492
6493 sym[len + 0] = i / 10 + '0';
6494 sym[len + 1] = i % 10 + '0';
6495 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6496 if (h != NULL
6497 && !h->def_regular)
6498 {
6499 h->root.type = bfd_link_hash_defined;
6500 h->root.u.def.section = htab->sfpr;
6501 h->root.u.def.value = htab->sfpr->size;
6502 h->type = STT_FUNC;
6503 h->def_regular = 1;
6504 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6505 writing = TRUE;
6506 if (htab->sfpr->contents == NULL)
6507 {
6508 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6509 if (htab->sfpr->contents == NULL)
6510 return FALSE;
6511 }
6512 }
6513 if (writing)
6514 {
6515 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6516 if (i != parm->hi)
6517 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6518 else
6519 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6520 htab->sfpr->size = p - htab->sfpr->contents;
6521 }
6522 }
6523
6524 return TRUE;
6525 }
6526
6527 static bfd_byte *
6528 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6529 {
6530 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6531 return p + 4;
6532 }
6533
6534 static bfd_byte *
6535 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6536 {
6537 p = savegpr0 (abfd, p, r);
6538 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6539 p = p + 4;
6540 bfd_put_32 (abfd, BLR, p);
6541 return p + 4;
6542 }
6543
6544 static bfd_byte *
6545 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6546 {
6547 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6548 return p + 4;
6549 }
6550
6551 static bfd_byte *
6552 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6553 {
6554 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6555 p = p + 4;
6556 p = restgpr0 (abfd, p, r);
6557 bfd_put_32 (abfd, MTLR_R0, p);
6558 p = p + 4;
6559 if (r == 29)
6560 {
6561 p = restgpr0 (abfd, p, 30);
6562 p = restgpr0 (abfd, p, 31);
6563 }
6564 bfd_put_32 (abfd, BLR, p);
6565 return p + 4;
6566 }
6567
6568 static bfd_byte *
6569 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6570 {
6571 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6572 return p + 4;
6573 }
6574
6575 static bfd_byte *
6576 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6577 {
6578 p = savegpr1 (abfd, p, r);
6579 bfd_put_32 (abfd, BLR, p);
6580 return p + 4;
6581 }
6582
6583 static bfd_byte *
6584 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6585 {
6586 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6587 return p + 4;
6588 }
6589
6590 static bfd_byte *
6591 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6592 {
6593 p = restgpr1 (abfd, p, r);
6594 bfd_put_32 (abfd, BLR, p);
6595 return p + 4;
6596 }
6597
6598 static bfd_byte *
6599 savefpr (bfd *abfd, bfd_byte *p, int r)
6600 {
6601 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6602 return p + 4;
6603 }
6604
6605 static bfd_byte *
6606 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6607 {
6608 p = savefpr (abfd, p, r);
6609 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6610 p = p + 4;
6611 bfd_put_32 (abfd, BLR, p);
6612 return p + 4;
6613 }
6614
6615 static bfd_byte *
6616 restfpr (bfd *abfd, bfd_byte *p, int r)
6617 {
6618 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6619 return p + 4;
6620 }
6621
6622 static bfd_byte *
6623 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6624 {
6625 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6626 p = p + 4;
6627 p = restfpr (abfd, p, r);
6628 bfd_put_32 (abfd, MTLR_R0, p);
6629 p = p + 4;
6630 if (r == 29)
6631 {
6632 p = restfpr (abfd, p, 30);
6633 p = restfpr (abfd, p, 31);
6634 }
6635 bfd_put_32 (abfd, BLR, p);
6636 return p + 4;
6637 }
6638
6639 static bfd_byte *
6640 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6641 {
6642 p = savefpr (abfd, p, r);
6643 bfd_put_32 (abfd, BLR, p);
6644 return p + 4;
6645 }
6646
6647 static bfd_byte *
6648 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6649 {
6650 p = restfpr (abfd, p, r);
6651 bfd_put_32 (abfd, BLR, p);
6652 return p + 4;
6653 }
6654
6655 static bfd_byte *
6656 savevr (bfd *abfd, bfd_byte *p, int r)
6657 {
6658 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6659 p = p + 4;
6660 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6661 return p + 4;
6662 }
6663
6664 static bfd_byte *
6665 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6666 {
6667 p = savevr (abfd, p, r);
6668 bfd_put_32 (abfd, BLR, p);
6669 return p + 4;
6670 }
6671
6672 static bfd_byte *
6673 restvr (bfd *abfd, bfd_byte *p, int r)
6674 {
6675 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6676 p = p + 4;
6677 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6678 return p + 4;
6679 }
6680
6681 static bfd_byte *
6682 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6683 {
6684 p = restvr (abfd, p, r);
6685 bfd_put_32 (abfd, BLR, p);
6686 return p + 4;
6687 }
6688
6689 /* Called via elf_link_hash_traverse to transfer dynamic linking
6690 information on function code symbol entries to their corresponding
6691 function descriptor symbol entries. */
6692
6693 static bfd_boolean
6694 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6695 {
6696 struct bfd_link_info *info;
6697 struct ppc_link_hash_table *htab;
6698 struct plt_entry *ent;
6699 struct ppc_link_hash_entry *fh;
6700 struct ppc_link_hash_entry *fdh;
6701 bfd_boolean force_local;
6702
6703 fh = (struct ppc_link_hash_entry *) h;
6704 if (fh->elf.root.type == bfd_link_hash_indirect)
6705 return TRUE;
6706
6707 info = inf;
6708 htab = ppc_hash_table (info);
6709 if (htab == NULL)
6710 return FALSE;
6711
6712 /* Resolve undefined references to dot-symbols as the value
6713 in the function descriptor, if we have one in a regular object.
6714 This is to satisfy cases like ".quad .foo". Calls to functions
6715 in dynamic objects are handled elsewhere. */
6716 if (fh->elf.root.type == bfd_link_hash_undefweak
6717 && fh->was_undefined
6718 && (fdh = defined_func_desc (fh)) != NULL
6719 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6720 && opd_entry_value (fdh->elf.root.u.def.section,
6721 fdh->elf.root.u.def.value,
6722 &fh->elf.root.u.def.section,
6723 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6724 {
6725 fh->elf.root.type = fdh->elf.root.type;
6726 fh->elf.forced_local = 1;
6727 fh->elf.def_regular = fdh->elf.def_regular;
6728 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6729 }
6730
6731 /* If this is a function code symbol, transfer dynamic linking
6732 information to the function descriptor symbol. */
6733 if (!fh->is_func)
6734 return TRUE;
6735
6736 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6737 if (ent->plt.refcount > 0)
6738 break;
6739 if (ent == NULL
6740 || fh->elf.root.root.string[0] != '.'
6741 || fh->elf.root.root.string[1] == '\0')
6742 return TRUE;
6743
6744 /* Find the corresponding function descriptor symbol. Create it
6745 as undefined if necessary. */
6746
6747 fdh = lookup_fdh (fh, htab);
6748 if (fdh == NULL
6749 && !info->executable
6750 && (fh->elf.root.type == bfd_link_hash_undefined
6751 || fh->elf.root.type == bfd_link_hash_undefweak))
6752 {
6753 fdh = make_fdh (info, fh);
6754 if (fdh == NULL)
6755 return FALSE;
6756 }
6757
6758 /* Fake function descriptors are made undefweak. If the function
6759 code symbol is strong undefined, make the fake sym the same.
6760 If the function code symbol is defined, then force the fake
6761 descriptor local; We can't support overriding of symbols in a
6762 shared library on a fake descriptor. */
6763
6764 if (fdh != NULL
6765 && fdh->fake
6766 && fdh->elf.root.type == bfd_link_hash_undefweak)
6767 {
6768 if (fh->elf.root.type == bfd_link_hash_undefined)
6769 {
6770 fdh->elf.root.type = bfd_link_hash_undefined;
6771 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6772 }
6773 else if (fh->elf.root.type == bfd_link_hash_defined
6774 || fh->elf.root.type == bfd_link_hash_defweak)
6775 {
6776 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6777 }
6778 }
6779
6780 if (fdh != NULL
6781 && !fdh->elf.forced_local
6782 && (!info->executable
6783 || fdh->elf.def_dynamic
6784 || fdh->elf.ref_dynamic
6785 || (fdh->elf.root.type == bfd_link_hash_undefweak
6786 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6787 {
6788 if (fdh->elf.dynindx == -1)
6789 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6790 return FALSE;
6791 fdh->elf.ref_regular |= fh->elf.ref_regular;
6792 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6793 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6794 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6795 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6796 {
6797 move_plt_plist (fh, fdh);
6798 fdh->elf.needs_plt = 1;
6799 }
6800 fdh->is_func_descriptor = 1;
6801 fdh->oh = fh;
6802 fh->oh = fdh;
6803 }
6804
6805 /* Now that the info is on the function descriptor, clear the
6806 function code sym info. Any function code syms for which we
6807 don't have a definition in a regular file, we force local.
6808 This prevents a shared library from exporting syms that have
6809 been imported from another library. Function code syms that
6810 are really in the library we must leave global to prevent the
6811 linker dragging in a definition from a static library. */
6812 force_local = (!fh->elf.def_regular
6813 || fdh == NULL
6814 || !fdh->elf.def_regular
6815 || fdh->elf.forced_local);
6816 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6817
6818 return TRUE;
6819 }
6820
6821 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6822 this hook to a) provide some gcc support functions, and b) transfer
6823 dynamic linking information gathered so far on function code symbol
6824 entries, to their corresponding function descriptor symbol entries. */
6825
6826 static bfd_boolean
6827 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6828 struct bfd_link_info *info)
6829 {
6830 struct ppc_link_hash_table *htab;
6831 unsigned int i;
6832 static const struct sfpr_def_parms funcs[] =
6833 {
6834 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6835 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6836 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6837 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6838 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6839 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6840 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6841 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6842 { "._savef", 14, 31, savefpr, savefpr1_tail },
6843 { "._restf", 14, 31, restfpr, restfpr1_tail },
6844 { "_savevr_", 20, 31, savevr, savevr_tail },
6845 { "_restvr_", 20, 31, restvr, restvr_tail }
6846 };
6847
6848 htab = ppc_hash_table (info);
6849 if (htab == NULL)
6850 return FALSE;
6851
6852 if (!info->relocatable
6853 && htab->elf.hgot != NULL)
6854 {
6855 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6856 /* Make .TOC. defined so as to prevent it being made dynamic.
6857 The wrong value here is fixed later in ppc64_elf_set_toc. */
6858 htab->elf.hgot->type = STT_OBJECT;
6859 htab->elf.hgot->root.type = bfd_link_hash_defined;
6860 htab->elf.hgot->root.u.def.value = 0;
6861 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6862 htab->elf.hgot->def_regular = 1;
6863 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6864 | STV_HIDDEN);
6865 }
6866
6867 if (htab->sfpr == NULL)
6868 /* We don't have any relocs. */
6869 return TRUE;
6870
6871 /* Provide any missing _save* and _rest* functions. */
6872 htab->sfpr->size = 0;
6873 if (!info->relocatable)
6874 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6875 if (!sfpr_define (info, &funcs[i]))
6876 return FALSE;
6877
6878 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6879
6880 if (htab->sfpr->size == 0)
6881 htab->sfpr->flags |= SEC_EXCLUDE;
6882
6883 return TRUE;
6884 }
6885
6886 /* Return true if we have dynamic relocs that apply to read-only sections. */
6887
6888 static bfd_boolean
6889 readonly_dynrelocs (struct elf_link_hash_entry *h)
6890 {
6891 struct ppc_link_hash_entry *eh;
6892 struct elf_dyn_relocs *p;
6893
6894 eh = (struct ppc_link_hash_entry *) h;
6895 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6896 {
6897 asection *s = p->sec->output_section;
6898
6899 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6900 return TRUE;
6901 }
6902 return FALSE;
6903 }
6904
6905 /* Adjust a symbol defined by a dynamic object and referenced by a
6906 regular object. The current definition is in some section of the
6907 dynamic object, but we're not including those sections. We have to
6908 change the definition to something the rest of the link can
6909 understand. */
6910
6911 static bfd_boolean
6912 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6913 struct elf_link_hash_entry *h)
6914 {
6915 struct ppc_link_hash_table *htab;
6916 asection *s;
6917
6918 htab = ppc_hash_table (info);
6919 if (htab == NULL)
6920 return FALSE;
6921
6922 /* Deal with function syms. */
6923 if (h->type == STT_FUNC
6924 || h->type == STT_GNU_IFUNC
6925 || h->needs_plt)
6926 {
6927 /* Clear procedure linkage table information for any symbol that
6928 won't need a .plt entry. */
6929 struct plt_entry *ent;
6930 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6931 if (ent->plt.refcount > 0)
6932 break;
6933 if (ent == NULL
6934 || (h->type != STT_GNU_IFUNC
6935 && (SYMBOL_CALLS_LOCAL (info, h)
6936 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6937 && h->root.type == bfd_link_hash_undefweak))))
6938 {
6939 h->plt.plist = NULL;
6940 h->needs_plt = 0;
6941 }
6942 else if (abiversion (info->output_bfd) == 2)
6943 {
6944 /* After adjust_dynamic_symbol, non_got_ref set in the
6945 non-shared case means that we have allocated space in
6946 .dynbss for the symbol and thus dyn_relocs for this
6947 symbol should be discarded.
6948 If we get here we know we are making a PLT entry for this
6949 symbol, and in an executable we'd normally resolve
6950 relocations against this symbol to the PLT entry. Allow
6951 dynamic relocs if the reference is weak, and the dynamic
6952 relocs will not cause text relocation. */
6953 if (!h->ref_regular_nonweak
6954 && h->non_got_ref
6955 && h->type != STT_GNU_IFUNC
6956 && !readonly_dynrelocs (h))
6957 h->non_got_ref = 0;
6958
6959 /* If making a plt entry, then we don't need copy relocs. */
6960 return TRUE;
6961 }
6962 }
6963 else
6964 h->plt.plist = NULL;
6965
6966 /* If this is a weak symbol, and there is a real definition, the
6967 processor independent code will have arranged for us to see the
6968 real definition first, and we can just use the same value. */
6969 if (h->u.weakdef != NULL)
6970 {
6971 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6972 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6973 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6974 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6975 if (ELIMINATE_COPY_RELOCS)
6976 h->non_got_ref = h->u.weakdef->non_got_ref;
6977 return TRUE;
6978 }
6979
6980 /* If we are creating a shared library, we must presume that the
6981 only references to the symbol are via the global offset table.
6982 For such cases we need not do anything here; the relocations will
6983 be handled correctly by relocate_section. */
6984 if (info->shared)
6985 return TRUE;
6986
6987 /* If there are no references to this symbol that do not use the
6988 GOT, we don't need to generate a copy reloc. */
6989 if (!h->non_got_ref)
6990 return TRUE;
6991
6992 /* Don't generate a copy reloc for symbols defined in the executable. */
6993 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6994 return TRUE;
6995
6996 /* If we didn't find any dynamic relocs in read-only sections, then
6997 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6998 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
6999 {
7000 h->non_got_ref = 0;
7001 return TRUE;
7002 }
7003
7004 if (h->plt.plist != NULL)
7005 {
7006 /* We should never get here, but unfortunately there are versions
7007 of gcc out there that improperly (for this ABI) put initialized
7008 function pointers, vtable refs and suchlike in read-only
7009 sections. Allow them to proceed, but warn that this might
7010 break at runtime. */
7011 info->callbacks->einfo
7012 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7013 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7014 h->root.root.string);
7015 }
7016
7017 /* This is a reference to a symbol defined by a dynamic object which
7018 is not a function. */
7019
7020 /* We must allocate the symbol in our .dynbss section, which will
7021 become part of the .bss section of the executable. There will be
7022 an entry for this symbol in the .dynsym section. The dynamic
7023 object will contain position independent code, so all references
7024 from the dynamic object to this symbol will go through the global
7025 offset table. The dynamic linker will use the .dynsym entry to
7026 determine the address it must put in the global offset table, so
7027 both the dynamic object and the regular object will refer to the
7028 same memory location for the variable. */
7029
7030 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7031 to copy the initial value out of the dynamic object and into the
7032 runtime process image. We need to remember the offset into the
7033 .rela.bss section we are going to use. */
7034 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7035 {
7036 htab->relbss->size += sizeof (Elf64_External_Rela);
7037 h->needs_copy = 1;
7038 }
7039
7040 s = htab->dynbss;
7041
7042 return _bfd_elf_adjust_dynamic_copy (h, s);
7043 }
7044
7045 /* If given a function descriptor symbol, hide both the function code
7046 sym and the descriptor. */
7047 static void
7048 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7049 struct elf_link_hash_entry *h,
7050 bfd_boolean force_local)
7051 {
7052 struct ppc_link_hash_entry *eh;
7053 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7054
7055 eh = (struct ppc_link_hash_entry *) h;
7056 if (eh->is_func_descriptor)
7057 {
7058 struct ppc_link_hash_entry *fh = eh->oh;
7059
7060 if (fh == NULL)
7061 {
7062 const char *p, *q;
7063 struct ppc_link_hash_table *htab;
7064 char save;
7065
7066 /* We aren't supposed to use alloca in BFD because on
7067 systems which do not have alloca the version in libiberty
7068 calls xmalloc, which might cause the program to crash
7069 when it runs out of memory. This function doesn't have a
7070 return status, so there's no way to gracefully return an
7071 error. So cheat. We know that string[-1] can be safely
7072 accessed; It's either a string in an ELF string table,
7073 or allocated in an objalloc structure. */
7074
7075 p = eh->elf.root.root.string - 1;
7076 save = *p;
7077 *(char *) p = '.';
7078 htab = ppc_hash_table (info);
7079 if (htab == NULL)
7080 return;
7081
7082 fh = (struct ppc_link_hash_entry *)
7083 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7084 *(char *) p = save;
7085
7086 /* Unfortunately, if it so happens that the string we were
7087 looking for was allocated immediately before this string,
7088 then we overwrote the string terminator. That's the only
7089 reason the lookup should fail. */
7090 if (fh == NULL)
7091 {
7092 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7093 while (q >= eh->elf.root.root.string && *q == *p)
7094 --q, --p;
7095 if (q < eh->elf.root.root.string && *p == '.')
7096 fh = (struct ppc_link_hash_entry *)
7097 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7098 }
7099 if (fh != NULL)
7100 {
7101 eh->oh = fh;
7102 fh->oh = eh;
7103 }
7104 }
7105 if (fh != NULL)
7106 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7107 }
7108 }
7109
7110 static bfd_boolean
7111 get_sym_h (struct elf_link_hash_entry **hp,
7112 Elf_Internal_Sym **symp,
7113 asection **symsecp,
7114 unsigned char **tls_maskp,
7115 Elf_Internal_Sym **locsymsp,
7116 unsigned long r_symndx,
7117 bfd *ibfd)
7118 {
7119 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7120
7121 if (r_symndx >= symtab_hdr->sh_info)
7122 {
7123 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7124 struct elf_link_hash_entry *h;
7125
7126 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7127 h = elf_follow_link (h);
7128
7129 if (hp != NULL)
7130 *hp = h;
7131
7132 if (symp != NULL)
7133 *symp = NULL;
7134
7135 if (symsecp != NULL)
7136 {
7137 asection *symsec = NULL;
7138 if (h->root.type == bfd_link_hash_defined
7139 || h->root.type == bfd_link_hash_defweak)
7140 symsec = h->root.u.def.section;
7141 *symsecp = symsec;
7142 }
7143
7144 if (tls_maskp != NULL)
7145 {
7146 struct ppc_link_hash_entry *eh;
7147
7148 eh = (struct ppc_link_hash_entry *) h;
7149 *tls_maskp = &eh->tls_mask;
7150 }
7151 }
7152 else
7153 {
7154 Elf_Internal_Sym *sym;
7155 Elf_Internal_Sym *locsyms = *locsymsp;
7156
7157 if (locsyms == NULL)
7158 {
7159 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7160 if (locsyms == NULL)
7161 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7162 symtab_hdr->sh_info,
7163 0, NULL, NULL, NULL);
7164 if (locsyms == NULL)
7165 return FALSE;
7166 *locsymsp = locsyms;
7167 }
7168 sym = locsyms + r_symndx;
7169
7170 if (hp != NULL)
7171 *hp = NULL;
7172
7173 if (symp != NULL)
7174 *symp = sym;
7175
7176 if (symsecp != NULL)
7177 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7178
7179 if (tls_maskp != NULL)
7180 {
7181 struct got_entry **lgot_ents;
7182 unsigned char *tls_mask;
7183
7184 tls_mask = NULL;
7185 lgot_ents = elf_local_got_ents (ibfd);
7186 if (lgot_ents != NULL)
7187 {
7188 struct plt_entry **local_plt = (struct plt_entry **)
7189 (lgot_ents + symtab_hdr->sh_info);
7190 unsigned char *lgot_masks = (unsigned char *)
7191 (local_plt + symtab_hdr->sh_info);
7192 tls_mask = &lgot_masks[r_symndx];
7193 }
7194 *tls_maskp = tls_mask;
7195 }
7196 }
7197 return TRUE;
7198 }
7199
7200 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7201 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7202 type suitable for optimization, and 1 otherwise. */
7203
7204 static int
7205 get_tls_mask (unsigned char **tls_maskp,
7206 unsigned long *toc_symndx,
7207 bfd_vma *toc_addend,
7208 Elf_Internal_Sym **locsymsp,
7209 const Elf_Internal_Rela *rel,
7210 bfd *ibfd)
7211 {
7212 unsigned long r_symndx;
7213 int next_r;
7214 struct elf_link_hash_entry *h;
7215 Elf_Internal_Sym *sym;
7216 asection *sec;
7217 bfd_vma off;
7218
7219 r_symndx = ELF64_R_SYM (rel->r_info);
7220 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7221 return 0;
7222
7223 if ((*tls_maskp != NULL && **tls_maskp != 0)
7224 || sec == NULL
7225 || ppc64_elf_section_data (sec) == NULL
7226 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7227 return 1;
7228
7229 /* Look inside a TOC section too. */
7230 if (h != NULL)
7231 {
7232 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7233 off = h->root.u.def.value;
7234 }
7235 else
7236 off = sym->st_value;
7237 off += rel->r_addend;
7238 BFD_ASSERT (off % 8 == 0);
7239 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7240 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7241 if (toc_symndx != NULL)
7242 *toc_symndx = r_symndx;
7243 if (toc_addend != NULL)
7244 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7245 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7246 return 0;
7247 if ((h == NULL || is_static_defined (h))
7248 && (next_r == -1 || next_r == -2))
7249 return 1 - next_r;
7250 return 1;
7251 }
7252
7253 /* Find (or create) an entry in the tocsave hash table. */
7254
7255 static struct tocsave_entry *
7256 tocsave_find (struct ppc_link_hash_table *htab,
7257 enum insert_option insert,
7258 Elf_Internal_Sym **local_syms,
7259 const Elf_Internal_Rela *irela,
7260 bfd *ibfd)
7261 {
7262 unsigned long r_indx;
7263 struct elf_link_hash_entry *h;
7264 Elf_Internal_Sym *sym;
7265 struct tocsave_entry ent, *p;
7266 hashval_t hash;
7267 struct tocsave_entry **slot;
7268
7269 r_indx = ELF64_R_SYM (irela->r_info);
7270 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7271 return NULL;
7272 if (ent.sec == NULL || ent.sec->output_section == NULL)
7273 {
7274 (*_bfd_error_handler)
7275 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7276 return NULL;
7277 }
7278
7279 if (h != NULL)
7280 ent.offset = h->root.u.def.value;
7281 else
7282 ent.offset = sym->st_value;
7283 ent.offset += irela->r_addend;
7284
7285 hash = tocsave_htab_hash (&ent);
7286 slot = ((struct tocsave_entry **)
7287 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7288 if (slot == NULL)
7289 return NULL;
7290
7291 if (*slot == NULL)
7292 {
7293 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7294 if (p == NULL)
7295 return NULL;
7296 *p = ent;
7297 *slot = p;
7298 }
7299 return *slot;
7300 }
7301
7302 /* Adjust all global syms defined in opd sections. In gcc generated
7303 code for the old ABI, these will already have been done. */
7304
7305 static bfd_boolean
7306 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7307 {
7308 struct ppc_link_hash_entry *eh;
7309 asection *sym_sec;
7310 struct _opd_sec_data *opd;
7311
7312 if (h->root.type == bfd_link_hash_indirect)
7313 return TRUE;
7314
7315 if (h->root.type != bfd_link_hash_defined
7316 && h->root.type != bfd_link_hash_defweak)
7317 return TRUE;
7318
7319 eh = (struct ppc_link_hash_entry *) h;
7320 if (eh->adjust_done)
7321 return TRUE;
7322
7323 sym_sec = eh->elf.root.u.def.section;
7324 opd = get_opd_info (sym_sec);
7325 if (opd != NULL && opd->adjust != NULL)
7326 {
7327 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7328 if (adjust == -1)
7329 {
7330 /* This entry has been deleted. */
7331 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7332 if (dsec == NULL)
7333 {
7334 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7335 if (discarded_section (dsec))
7336 {
7337 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7338 break;
7339 }
7340 }
7341 eh->elf.root.u.def.value = 0;
7342 eh->elf.root.u.def.section = dsec;
7343 }
7344 else
7345 eh->elf.root.u.def.value += adjust;
7346 eh->adjust_done = 1;
7347 }
7348 return TRUE;
7349 }
7350
7351 /* Handles decrementing dynamic reloc counts for the reloc specified by
7352 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7353 have already been determined. */
7354
7355 static bfd_boolean
7356 dec_dynrel_count (bfd_vma r_info,
7357 asection *sec,
7358 struct bfd_link_info *info,
7359 Elf_Internal_Sym **local_syms,
7360 struct elf_link_hash_entry *h,
7361 Elf_Internal_Sym *sym)
7362 {
7363 enum elf_ppc64_reloc_type r_type;
7364 asection *sym_sec = NULL;
7365
7366 /* Can this reloc be dynamic? This switch, and later tests here
7367 should be kept in sync with the code in check_relocs. */
7368 r_type = ELF64_R_TYPE (r_info);
7369 switch (r_type)
7370 {
7371 default:
7372 return TRUE;
7373
7374 case R_PPC64_TPREL16:
7375 case R_PPC64_TPREL16_LO:
7376 case R_PPC64_TPREL16_HI:
7377 case R_PPC64_TPREL16_HA:
7378 case R_PPC64_TPREL16_DS:
7379 case R_PPC64_TPREL16_LO_DS:
7380 case R_PPC64_TPREL16_HIGH:
7381 case R_PPC64_TPREL16_HIGHA:
7382 case R_PPC64_TPREL16_HIGHER:
7383 case R_PPC64_TPREL16_HIGHERA:
7384 case R_PPC64_TPREL16_HIGHEST:
7385 case R_PPC64_TPREL16_HIGHESTA:
7386 if (!info->shared)
7387 return TRUE;
7388
7389 case R_PPC64_TPREL64:
7390 case R_PPC64_DTPMOD64:
7391 case R_PPC64_DTPREL64:
7392 case R_PPC64_ADDR64:
7393 case R_PPC64_REL30:
7394 case R_PPC64_REL32:
7395 case R_PPC64_REL64:
7396 case R_PPC64_ADDR14:
7397 case R_PPC64_ADDR14_BRNTAKEN:
7398 case R_PPC64_ADDR14_BRTAKEN:
7399 case R_PPC64_ADDR16:
7400 case R_PPC64_ADDR16_DS:
7401 case R_PPC64_ADDR16_HA:
7402 case R_PPC64_ADDR16_HI:
7403 case R_PPC64_ADDR16_HIGH:
7404 case R_PPC64_ADDR16_HIGHA:
7405 case R_PPC64_ADDR16_HIGHER:
7406 case R_PPC64_ADDR16_HIGHERA:
7407 case R_PPC64_ADDR16_HIGHEST:
7408 case R_PPC64_ADDR16_HIGHESTA:
7409 case R_PPC64_ADDR16_LO:
7410 case R_PPC64_ADDR16_LO_DS:
7411 case R_PPC64_ADDR24:
7412 case R_PPC64_ADDR32:
7413 case R_PPC64_UADDR16:
7414 case R_PPC64_UADDR32:
7415 case R_PPC64_UADDR64:
7416 case R_PPC64_TOC:
7417 break;
7418 }
7419
7420 if (local_syms != NULL)
7421 {
7422 unsigned long r_symndx;
7423 bfd *ibfd = sec->owner;
7424
7425 r_symndx = ELF64_R_SYM (r_info);
7426 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7427 return FALSE;
7428 }
7429
7430 if ((info->shared
7431 && (must_be_dyn_reloc (info, r_type)
7432 || (h != NULL
7433 && (!SYMBOLIC_BIND (info, h)
7434 || h->root.type == bfd_link_hash_defweak
7435 || !h->def_regular))))
7436 || (ELIMINATE_COPY_RELOCS
7437 && !info->shared
7438 && h != NULL
7439 && (h->root.type == bfd_link_hash_defweak
7440 || !h->def_regular)))
7441 ;
7442 else
7443 return TRUE;
7444
7445 if (h != NULL)
7446 {
7447 struct elf_dyn_relocs *p;
7448 struct elf_dyn_relocs **pp;
7449 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7450
7451 /* elf_gc_sweep may have already removed all dyn relocs associated
7452 with local syms for a given section. Also, symbol flags are
7453 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7454 report a dynreloc miscount. */
7455 if (*pp == NULL && info->gc_sections)
7456 return TRUE;
7457
7458 while ((p = *pp) != NULL)
7459 {
7460 if (p->sec == sec)
7461 {
7462 if (!must_be_dyn_reloc (info, r_type))
7463 p->pc_count -= 1;
7464 p->count -= 1;
7465 if (p->count == 0)
7466 *pp = p->next;
7467 return TRUE;
7468 }
7469 pp = &p->next;
7470 }
7471 }
7472 else
7473 {
7474 struct ppc_dyn_relocs *p;
7475 struct ppc_dyn_relocs **pp;
7476 void *vpp;
7477 bfd_boolean is_ifunc;
7478
7479 if (local_syms == NULL)
7480 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7481 if (sym_sec == NULL)
7482 sym_sec = sec;
7483
7484 vpp = &elf_section_data (sym_sec)->local_dynrel;
7485 pp = (struct ppc_dyn_relocs **) vpp;
7486
7487 if (*pp == NULL && info->gc_sections)
7488 return TRUE;
7489
7490 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7491 while ((p = *pp) != NULL)
7492 {
7493 if (p->sec == sec && p->ifunc == is_ifunc)
7494 {
7495 p->count -= 1;
7496 if (p->count == 0)
7497 *pp = p->next;
7498 return TRUE;
7499 }
7500 pp = &p->next;
7501 }
7502 }
7503
7504 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7505 sec->owner, sec);
7506 bfd_set_error (bfd_error_bad_value);
7507 return FALSE;
7508 }
7509
7510 /* Remove unused Official Procedure Descriptor entries. Currently we
7511 only remove those associated with functions in discarded link-once
7512 sections, or weakly defined functions that have been overridden. It
7513 would be possible to remove many more entries for statically linked
7514 applications. */
7515
7516 bfd_boolean
7517 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7518 {
7519 bfd *ibfd;
7520 bfd_boolean some_edited = FALSE;
7521 asection *need_pad = NULL;
7522
7523 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7524 {
7525 asection *sec;
7526 Elf_Internal_Rela *relstart, *rel, *relend;
7527 Elf_Internal_Shdr *symtab_hdr;
7528 Elf_Internal_Sym *local_syms;
7529 bfd_vma offset;
7530 struct _opd_sec_data *opd;
7531 bfd_boolean need_edit, add_aux_fields;
7532 bfd_size_type cnt_16b = 0;
7533
7534 if (!is_ppc64_elf (ibfd))
7535 continue;
7536
7537 sec = bfd_get_section_by_name (ibfd, ".opd");
7538 if (sec == NULL || sec->size == 0)
7539 continue;
7540
7541 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7542 continue;
7543
7544 if (sec->output_section == bfd_abs_section_ptr)
7545 continue;
7546
7547 /* Look through the section relocs. */
7548 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7549 continue;
7550
7551 local_syms = NULL;
7552 symtab_hdr = &elf_symtab_hdr (ibfd);
7553
7554 /* Read the relocations. */
7555 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7556 info->keep_memory);
7557 if (relstart == NULL)
7558 return FALSE;
7559
7560 /* First run through the relocs to check they are sane, and to
7561 determine whether we need to edit this opd section. */
7562 need_edit = FALSE;
7563 need_pad = sec;
7564 offset = 0;
7565 relend = relstart + sec->reloc_count;
7566 for (rel = relstart; rel < relend; )
7567 {
7568 enum elf_ppc64_reloc_type r_type;
7569 unsigned long r_symndx;
7570 asection *sym_sec;
7571 struct elf_link_hash_entry *h;
7572 Elf_Internal_Sym *sym;
7573
7574 /* .opd contains a regular array of 16 or 24 byte entries. We're
7575 only interested in the reloc pointing to a function entry
7576 point. */
7577 if (rel->r_offset != offset
7578 || rel + 1 >= relend
7579 || (rel + 1)->r_offset != offset + 8)
7580 {
7581 /* If someone messes with .opd alignment then after a
7582 "ld -r" we might have padding in the middle of .opd.
7583 Also, there's nothing to prevent someone putting
7584 something silly in .opd with the assembler. No .opd
7585 optimization for them! */
7586 broken_opd:
7587 (*_bfd_error_handler)
7588 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7589 need_edit = FALSE;
7590 break;
7591 }
7592
7593 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7594 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7595 {
7596 (*_bfd_error_handler)
7597 (_("%B: unexpected reloc type %u in .opd section"),
7598 ibfd, r_type);
7599 need_edit = FALSE;
7600 break;
7601 }
7602
7603 r_symndx = ELF64_R_SYM (rel->r_info);
7604 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7605 r_symndx, ibfd))
7606 goto error_ret;
7607
7608 if (sym_sec == NULL || sym_sec->owner == NULL)
7609 {
7610 const char *sym_name;
7611 if (h != NULL)
7612 sym_name = h->root.root.string;
7613 else
7614 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7615 sym_sec);
7616
7617 (*_bfd_error_handler)
7618 (_("%B: undefined sym `%s' in .opd section"),
7619 ibfd, sym_name);
7620 need_edit = FALSE;
7621 break;
7622 }
7623
7624 /* opd entries are always for functions defined in the
7625 current input bfd. If the symbol isn't defined in the
7626 input bfd, then we won't be using the function in this
7627 bfd; It must be defined in a linkonce section in another
7628 bfd, or is weak. It's also possible that we are
7629 discarding the function due to a linker script /DISCARD/,
7630 which we test for via the output_section. */
7631 if (sym_sec->owner != ibfd
7632 || sym_sec->output_section == bfd_abs_section_ptr)
7633 need_edit = TRUE;
7634
7635 rel += 2;
7636 if (rel == relend
7637 || (rel + 1 == relend && rel->r_offset == offset + 16))
7638 {
7639 if (sec->size == offset + 24)
7640 {
7641 need_pad = NULL;
7642 break;
7643 }
7644 if (rel == relend && sec->size == offset + 16)
7645 {
7646 cnt_16b++;
7647 break;
7648 }
7649 goto broken_opd;
7650 }
7651
7652 if (rel->r_offset == offset + 24)
7653 offset += 24;
7654 else if (rel->r_offset != offset + 16)
7655 goto broken_opd;
7656 else if (rel + 1 < relend
7657 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7658 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7659 {
7660 offset += 16;
7661 cnt_16b++;
7662 }
7663 else if (rel + 2 < relend
7664 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7665 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7666 {
7667 offset += 24;
7668 rel += 1;
7669 }
7670 else
7671 goto broken_opd;
7672 }
7673
7674 add_aux_fields = non_overlapping && cnt_16b > 0;
7675
7676 if (need_edit || add_aux_fields)
7677 {
7678 Elf_Internal_Rela *write_rel;
7679 Elf_Internal_Shdr *rel_hdr;
7680 bfd_byte *rptr, *wptr;
7681 bfd_byte *new_contents;
7682 bfd_boolean skip;
7683 long opd_ent_size;
7684 bfd_size_type amt;
7685
7686 new_contents = NULL;
7687 amt = sec->size * sizeof (long) / 8;
7688 opd = &ppc64_elf_section_data (sec)->u.opd;
7689 opd->adjust = bfd_zalloc (sec->owner, amt);
7690 if (opd->adjust == NULL)
7691 return FALSE;
7692 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7693
7694 /* This seems a waste of time as input .opd sections are all
7695 zeros as generated by gcc, but I suppose there's no reason
7696 this will always be so. We might start putting something in
7697 the third word of .opd entries. */
7698 if ((sec->flags & SEC_IN_MEMORY) == 0)
7699 {
7700 bfd_byte *loc;
7701 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7702 {
7703 if (loc != NULL)
7704 free (loc);
7705 error_ret:
7706 if (local_syms != NULL
7707 && symtab_hdr->contents != (unsigned char *) local_syms)
7708 free (local_syms);
7709 if (elf_section_data (sec)->relocs != relstart)
7710 free (relstart);
7711 return FALSE;
7712 }
7713 sec->contents = loc;
7714 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7715 }
7716
7717 elf_section_data (sec)->relocs = relstart;
7718
7719 new_contents = sec->contents;
7720 if (add_aux_fields)
7721 {
7722 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7723 if (new_contents == NULL)
7724 return FALSE;
7725 need_pad = FALSE;
7726 }
7727 wptr = new_contents;
7728 rptr = sec->contents;
7729
7730 write_rel = relstart;
7731 skip = FALSE;
7732 offset = 0;
7733 opd_ent_size = 0;
7734 for (rel = relstart; rel < relend; rel++)
7735 {
7736 unsigned long r_symndx;
7737 asection *sym_sec;
7738 struct elf_link_hash_entry *h;
7739 Elf_Internal_Sym *sym;
7740
7741 r_symndx = ELF64_R_SYM (rel->r_info);
7742 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7743 r_symndx, ibfd))
7744 goto error_ret;
7745
7746 if (rel->r_offset == offset)
7747 {
7748 struct ppc_link_hash_entry *fdh = NULL;
7749
7750 /* See if the .opd entry is full 24 byte or
7751 16 byte (with fd_aux entry overlapped with next
7752 fd_func). */
7753 opd_ent_size = 24;
7754 if ((rel + 2 == relend && sec->size == offset + 16)
7755 || (rel + 3 < relend
7756 && rel[2].r_offset == offset + 16
7757 && rel[3].r_offset == offset + 24
7758 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7759 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7760 opd_ent_size = 16;
7761
7762 if (h != NULL
7763 && h->root.root.string[0] == '.')
7764 {
7765 struct ppc_link_hash_table *htab;
7766
7767 htab = ppc_hash_table (info);
7768 if (htab != NULL)
7769 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7770 htab);
7771 if (fdh != NULL
7772 && fdh->elf.root.type != bfd_link_hash_defined
7773 && fdh->elf.root.type != bfd_link_hash_defweak)
7774 fdh = NULL;
7775 }
7776
7777 skip = (sym_sec->owner != ibfd
7778 || sym_sec->output_section == bfd_abs_section_ptr);
7779 if (skip)
7780 {
7781 if (fdh != NULL && sym_sec->owner == ibfd)
7782 {
7783 /* Arrange for the function descriptor sym
7784 to be dropped. */
7785 fdh->elf.root.u.def.value = 0;
7786 fdh->elf.root.u.def.section = sym_sec;
7787 }
7788 opd->adjust[rel->r_offset / 8] = -1;
7789 }
7790 else
7791 {
7792 /* We'll be keeping this opd entry. */
7793
7794 if (fdh != NULL)
7795 {
7796 /* Redefine the function descriptor symbol to
7797 this location in the opd section. It is
7798 necessary to update the value here rather
7799 than using an array of adjustments as we do
7800 for local symbols, because various places
7801 in the generic ELF code use the value
7802 stored in u.def.value. */
7803 fdh->elf.root.u.def.value = wptr - new_contents;
7804 fdh->adjust_done = 1;
7805 }
7806
7807 /* Local syms are a bit tricky. We could
7808 tweak them as they can be cached, but
7809 we'd need to look through the local syms
7810 for the function descriptor sym which we
7811 don't have at the moment. So keep an
7812 array of adjustments. */
7813 opd->adjust[rel->r_offset / 8]
7814 = (wptr - new_contents) - (rptr - sec->contents);
7815
7816 if (wptr != rptr)
7817 memcpy (wptr, rptr, opd_ent_size);
7818 wptr += opd_ent_size;
7819 if (add_aux_fields && opd_ent_size == 16)
7820 {
7821 memset (wptr, '\0', 8);
7822 wptr += 8;
7823 }
7824 }
7825 rptr += opd_ent_size;
7826 offset += opd_ent_size;
7827 }
7828
7829 if (skip)
7830 {
7831 if (!NO_OPD_RELOCS
7832 && !info->relocatable
7833 && !dec_dynrel_count (rel->r_info, sec, info,
7834 NULL, h, sym))
7835 goto error_ret;
7836 }
7837 else
7838 {
7839 /* We need to adjust any reloc offsets to point to the
7840 new opd entries. While we're at it, we may as well
7841 remove redundant relocs. */
7842 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7843 if (write_rel != rel)
7844 memcpy (write_rel, rel, sizeof (*rel));
7845 ++write_rel;
7846 }
7847 }
7848
7849 sec->size = wptr - new_contents;
7850 sec->reloc_count = write_rel - relstart;
7851 if (add_aux_fields)
7852 {
7853 free (sec->contents);
7854 sec->contents = new_contents;
7855 }
7856
7857 /* Fudge the header size too, as this is used later in
7858 elf_bfd_final_link if we are emitting relocs. */
7859 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7860 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7861 some_edited = TRUE;
7862 }
7863 else if (elf_section_data (sec)->relocs != relstart)
7864 free (relstart);
7865
7866 if (local_syms != NULL
7867 && symtab_hdr->contents != (unsigned char *) local_syms)
7868 {
7869 if (!info->keep_memory)
7870 free (local_syms);
7871 else
7872 symtab_hdr->contents = (unsigned char *) local_syms;
7873 }
7874 }
7875
7876 if (some_edited)
7877 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7878
7879 /* If we are doing a final link and the last .opd entry is just 16 byte
7880 long, add a 8 byte padding after it. */
7881 if (need_pad != NULL && !info->relocatable)
7882 {
7883 bfd_byte *p;
7884
7885 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7886 {
7887 BFD_ASSERT (need_pad->size > 0);
7888
7889 p = bfd_malloc (need_pad->size + 8);
7890 if (p == NULL)
7891 return FALSE;
7892
7893 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7894 p, 0, need_pad->size))
7895 return FALSE;
7896
7897 need_pad->contents = p;
7898 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7899 }
7900 else
7901 {
7902 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7903 if (p == NULL)
7904 return FALSE;
7905
7906 need_pad->contents = p;
7907 }
7908
7909 memset (need_pad->contents + need_pad->size, 0, 8);
7910 need_pad->size += 8;
7911 }
7912
7913 return TRUE;
7914 }
7915
7916 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7917
7918 asection *
7919 ppc64_elf_tls_setup (struct bfd_link_info *info,
7920 int no_tls_get_addr_opt,
7921 int *no_multi_toc)
7922 {
7923 struct ppc_link_hash_table *htab;
7924
7925 htab = ppc_hash_table (info);
7926 if (htab == NULL)
7927 return NULL;
7928
7929 if (abiversion (info->output_bfd) == 1)
7930 htab->opd_abi = 1;
7931
7932 if (*no_multi_toc)
7933 htab->do_multi_toc = 0;
7934 else if (!htab->do_multi_toc)
7935 *no_multi_toc = 1;
7936
7937 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7938 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7939 FALSE, FALSE, TRUE));
7940 /* Move dynamic linking info to the function descriptor sym. */
7941 if (htab->tls_get_addr != NULL)
7942 func_desc_adjust (&htab->tls_get_addr->elf, info);
7943 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7944 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7945 FALSE, FALSE, TRUE));
7946 if (!no_tls_get_addr_opt)
7947 {
7948 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7949
7950 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7951 FALSE, FALSE, TRUE);
7952 if (opt != NULL)
7953 func_desc_adjust (opt, info);
7954 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7955 FALSE, FALSE, TRUE);
7956 if (opt_fd != NULL
7957 && (opt_fd->root.type == bfd_link_hash_defined
7958 || opt_fd->root.type == bfd_link_hash_defweak))
7959 {
7960 /* If glibc supports an optimized __tls_get_addr call stub,
7961 signalled by the presence of __tls_get_addr_opt, and we'll
7962 be calling __tls_get_addr via a plt call stub, then
7963 make __tls_get_addr point to __tls_get_addr_opt. */
7964 tga_fd = &htab->tls_get_addr_fd->elf;
7965 if (htab->elf.dynamic_sections_created
7966 && tga_fd != NULL
7967 && (tga_fd->type == STT_FUNC
7968 || tga_fd->needs_plt)
7969 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7970 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7971 && tga_fd->root.type == bfd_link_hash_undefweak)))
7972 {
7973 struct plt_entry *ent;
7974
7975 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7976 if (ent->plt.refcount > 0)
7977 break;
7978 if (ent != NULL)
7979 {
7980 tga_fd->root.type = bfd_link_hash_indirect;
7981 tga_fd->root.u.i.link = &opt_fd->root;
7982 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7983 if (opt_fd->dynindx != -1)
7984 {
7985 /* Use __tls_get_addr_opt in dynamic relocations. */
7986 opt_fd->dynindx = -1;
7987 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7988 opt_fd->dynstr_index);
7989 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7990 return NULL;
7991 }
7992 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7993 tga = &htab->tls_get_addr->elf;
7994 if (opt != NULL && tga != NULL)
7995 {
7996 tga->root.type = bfd_link_hash_indirect;
7997 tga->root.u.i.link = &opt->root;
7998 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7999 _bfd_elf_link_hash_hide_symbol (info, opt,
8000 tga->forced_local);
8001 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8002 }
8003 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8004 htab->tls_get_addr_fd->is_func_descriptor = 1;
8005 if (htab->tls_get_addr != NULL)
8006 {
8007 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8008 htab->tls_get_addr->is_func = 1;
8009 }
8010 }
8011 }
8012 }
8013 else
8014 no_tls_get_addr_opt = TRUE;
8015 }
8016 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
8017 return _bfd_elf_tls_setup (info->output_bfd, info);
8018 }
8019
8020 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8021 HASH1 or HASH2. */
8022
8023 static bfd_boolean
8024 branch_reloc_hash_match (const bfd *ibfd,
8025 const Elf_Internal_Rela *rel,
8026 const struct ppc_link_hash_entry *hash1,
8027 const struct ppc_link_hash_entry *hash2)
8028 {
8029 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8030 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8031 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8032
8033 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8034 {
8035 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8036 struct elf_link_hash_entry *h;
8037
8038 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8039 h = elf_follow_link (h);
8040 if (h == &hash1->elf || h == &hash2->elf)
8041 return TRUE;
8042 }
8043 return FALSE;
8044 }
8045
8046 /* Run through all the TLS relocs looking for optimization
8047 opportunities. The linker has been hacked (see ppc64elf.em) to do
8048 a preliminary section layout so that we know the TLS segment
8049 offsets. We can't optimize earlier because some optimizations need
8050 to know the tp offset, and we need to optimize before allocating
8051 dynamic relocations. */
8052
8053 bfd_boolean
8054 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8055 {
8056 bfd *ibfd;
8057 asection *sec;
8058 struct ppc_link_hash_table *htab;
8059 unsigned char *toc_ref;
8060 int pass;
8061
8062 if (info->relocatable || !info->executable)
8063 return TRUE;
8064
8065 htab = ppc_hash_table (info);
8066 if (htab == NULL)
8067 return FALSE;
8068
8069 /* Make two passes over the relocs. On the first pass, mark toc
8070 entries involved with tls relocs, and check that tls relocs
8071 involved in setting up a tls_get_addr call are indeed followed by
8072 such a call. If they are not, we can't do any tls optimization.
8073 On the second pass twiddle tls_mask flags to notify
8074 relocate_section that optimization can be done, and adjust got
8075 and plt refcounts. */
8076 toc_ref = NULL;
8077 for (pass = 0; pass < 2; ++pass)
8078 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8079 {
8080 Elf_Internal_Sym *locsyms = NULL;
8081 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8082
8083 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8084 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8085 {
8086 Elf_Internal_Rela *relstart, *rel, *relend;
8087 bfd_boolean found_tls_get_addr_arg = 0;
8088
8089 /* Read the relocations. */
8090 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8091 info->keep_memory);
8092 if (relstart == NULL)
8093 {
8094 free (toc_ref);
8095 return FALSE;
8096 }
8097
8098 relend = relstart + sec->reloc_count;
8099 for (rel = relstart; rel < relend; rel++)
8100 {
8101 enum elf_ppc64_reloc_type r_type;
8102 unsigned long r_symndx;
8103 struct elf_link_hash_entry *h;
8104 Elf_Internal_Sym *sym;
8105 asection *sym_sec;
8106 unsigned char *tls_mask;
8107 unsigned char tls_set, tls_clear, tls_type = 0;
8108 bfd_vma value;
8109 bfd_boolean ok_tprel, is_local;
8110 long toc_ref_index = 0;
8111 int expecting_tls_get_addr = 0;
8112 bfd_boolean ret = FALSE;
8113
8114 r_symndx = ELF64_R_SYM (rel->r_info);
8115 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8116 r_symndx, ibfd))
8117 {
8118 err_free_rel:
8119 if (elf_section_data (sec)->relocs != relstart)
8120 free (relstart);
8121 if (toc_ref != NULL)
8122 free (toc_ref);
8123 if (locsyms != NULL
8124 && (elf_symtab_hdr (ibfd).contents
8125 != (unsigned char *) locsyms))
8126 free (locsyms);
8127 return ret;
8128 }
8129
8130 if (h != NULL)
8131 {
8132 if (h->root.type == bfd_link_hash_defined
8133 || h->root.type == bfd_link_hash_defweak)
8134 value = h->root.u.def.value;
8135 else if (h->root.type == bfd_link_hash_undefweak)
8136 value = 0;
8137 else
8138 {
8139 found_tls_get_addr_arg = 0;
8140 continue;
8141 }
8142 }
8143 else
8144 /* Symbols referenced by TLS relocs must be of type
8145 STT_TLS. So no need for .opd local sym adjust. */
8146 value = sym->st_value;
8147
8148 ok_tprel = FALSE;
8149 is_local = FALSE;
8150 if (h == NULL
8151 || !h->def_dynamic)
8152 {
8153 is_local = TRUE;
8154 if (h != NULL
8155 && h->root.type == bfd_link_hash_undefweak)
8156 ok_tprel = TRUE;
8157 else
8158 {
8159 value += sym_sec->output_offset;
8160 value += sym_sec->output_section->vma;
8161 value -= htab->elf.tls_sec->vma;
8162 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8163 < (bfd_vma) 1 << 32);
8164 }
8165 }
8166
8167 r_type = ELF64_R_TYPE (rel->r_info);
8168 /* If this section has old-style __tls_get_addr calls
8169 without marker relocs, then check that each
8170 __tls_get_addr call reloc is preceded by a reloc
8171 that conceivably belongs to the __tls_get_addr arg
8172 setup insn. If we don't find matching arg setup
8173 relocs, don't do any tls optimization. */
8174 if (pass == 0
8175 && sec->has_tls_get_addr_call
8176 && h != NULL
8177 && (h == &htab->tls_get_addr->elf
8178 || h == &htab->tls_get_addr_fd->elf)
8179 && !found_tls_get_addr_arg
8180 && is_branch_reloc (r_type))
8181 {
8182 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8183 "TLS optimization disabled\n"),
8184 ibfd, sec, rel->r_offset);
8185 ret = TRUE;
8186 goto err_free_rel;
8187 }
8188
8189 found_tls_get_addr_arg = 0;
8190 switch (r_type)
8191 {
8192 case R_PPC64_GOT_TLSLD16:
8193 case R_PPC64_GOT_TLSLD16_LO:
8194 expecting_tls_get_addr = 1;
8195 found_tls_get_addr_arg = 1;
8196 /* Fall thru */
8197
8198 case R_PPC64_GOT_TLSLD16_HI:
8199 case R_PPC64_GOT_TLSLD16_HA:
8200 /* These relocs should never be against a symbol
8201 defined in a shared lib. Leave them alone if
8202 that turns out to be the case. */
8203 if (!is_local)
8204 continue;
8205
8206 /* LD -> LE */
8207 tls_set = 0;
8208 tls_clear = TLS_LD;
8209 tls_type = TLS_TLS | TLS_LD;
8210 break;
8211
8212 case R_PPC64_GOT_TLSGD16:
8213 case R_PPC64_GOT_TLSGD16_LO:
8214 expecting_tls_get_addr = 1;
8215 found_tls_get_addr_arg = 1;
8216 /* Fall thru */
8217
8218 case R_PPC64_GOT_TLSGD16_HI:
8219 case R_PPC64_GOT_TLSGD16_HA:
8220 if (ok_tprel)
8221 /* GD -> LE */
8222 tls_set = 0;
8223 else
8224 /* GD -> IE */
8225 tls_set = TLS_TLS | TLS_TPRELGD;
8226 tls_clear = TLS_GD;
8227 tls_type = TLS_TLS | TLS_GD;
8228 break;
8229
8230 case R_PPC64_GOT_TPREL16_DS:
8231 case R_PPC64_GOT_TPREL16_LO_DS:
8232 case R_PPC64_GOT_TPREL16_HI:
8233 case R_PPC64_GOT_TPREL16_HA:
8234 if (ok_tprel)
8235 {
8236 /* IE -> LE */
8237 tls_set = 0;
8238 tls_clear = TLS_TPREL;
8239 tls_type = TLS_TLS | TLS_TPREL;
8240 break;
8241 }
8242 continue;
8243
8244 case R_PPC64_TLSGD:
8245 case R_PPC64_TLSLD:
8246 found_tls_get_addr_arg = 1;
8247 /* Fall thru */
8248
8249 case R_PPC64_TLS:
8250 case R_PPC64_TOC16:
8251 case R_PPC64_TOC16_LO:
8252 if (sym_sec == NULL || sym_sec != toc)
8253 continue;
8254
8255 /* Mark this toc entry as referenced by a TLS
8256 code sequence. We can do that now in the
8257 case of R_PPC64_TLS, and after checking for
8258 tls_get_addr for the TOC16 relocs. */
8259 if (toc_ref == NULL)
8260 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8261 if (toc_ref == NULL)
8262 goto err_free_rel;
8263
8264 if (h != NULL)
8265 value = h->root.u.def.value;
8266 else
8267 value = sym->st_value;
8268 value += rel->r_addend;
8269 BFD_ASSERT (value < toc->size && value % 8 == 0);
8270 toc_ref_index = (value + toc->output_offset) / 8;
8271 if (r_type == R_PPC64_TLS
8272 || r_type == R_PPC64_TLSGD
8273 || r_type == R_PPC64_TLSLD)
8274 {
8275 toc_ref[toc_ref_index] = 1;
8276 continue;
8277 }
8278
8279 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8280 continue;
8281
8282 tls_set = 0;
8283 tls_clear = 0;
8284 expecting_tls_get_addr = 2;
8285 break;
8286
8287 case R_PPC64_TPREL64:
8288 if (pass == 0
8289 || sec != toc
8290 || toc_ref == NULL
8291 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8292 continue;
8293 if (ok_tprel)
8294 {
8295 /* IE -> LE */
8296 tls_set = TLS_EXPLICIT;
8297 tls_clear = TLS_TPREL;
8298 break;
8299 }
8300 continue;
8301
8302 case R_PPC64_DTPMOD64:
8303 if (pass == 0
8304 || sec != toc
8305 || toc_ref == NULL
8306 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8307 continue;
8308 if (rel + 1 < relend
8309 && (rel[1].r_info
8310 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8311 && rel[1].r_offset == rel->r_offset + 8)
8312 {
8313 if (ok_tprel)
8314 /* GD -> LE */
8315 tls_set = TLS_EXPLICIT | TLS_GD;
8316 else
8317 /* GD -> IE */
8318 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8319 tls_clear = TLS_GD;
8320 }
8321 else
8322 {
8323 if (!is_local)
8324 continue;
8325
8326 /* LD -> LE */
8327 tls_set = TLS_EXPLICIT;
8328 tls_clear = TLS_LD;
8329 }
8330 break;
8331
8332 default:
8333 continue;
8334 }
8335
8336 if (pass == 0)
8337 {
8338 if (!expecting_tls_get_addr
8339 || !sec->has_tls_get_addr_call)
8340 continue;
8341
8342 if (rel + 1 < relend
8343 && branch_reloc_hash_match (ibfd, rel + 1,
8344 htab->tls_get_addr,
8345 htab->tls_get_addr_fd))
8346 {
8347 if (expecting_tls_get_addr == 2)
8348 {
8349 /* Check for toc tls entries. */
8350 unsigned char *toc_tls;
8351 int retval;
8352
8353 retval = get_tls_mask (&toc_tls, NULL, NULL,
8354 &locsyms,
8355 rel, ibfd);
8356 if (retval == 0)
8357 goto err_free_rel;
8358 if (toc_tls != NULL)
8359 {
8360 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8361 found_tls_get_addr_arg = 1;
8362 if (retval > 1)
8363 toc_ref[toc_ref_index] = 1;
8364 }
8365 }
8366 continue;
8367 }
8368
8369 if (expecting_tls_get_addr != 1)
8370 continue;
8371
8372 /* Uh oh, we didn't find the expected call. We
8373 could just mark this symbol to exclude it
8374 from tls optimization but it's safer to skip
8375 the entire optimization. */
8376 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8377 "TLS optimization disabled\n"),
8378 ibfd, sec, rel->r_offset);
8379 ret = TRUE;
8380 goto err_free_rel;
8381 }
8382
8383 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8384 {
8385 struct plt_entry *ent;
8386 for (ent = htab->tls_get_addr->elf.plt.plist;
8387 ent != NULL;
8388 ent = ent->next)
8389 if (ent->addend == 0)
8390 {
8391 if (ent->plt.refcount > 0)
8392 {
8393 ent->plt.refcount -= 1;
8394 expecting_tls_get_addr = 0;
8395 }
8396 break;
8397 }
8398 }
8399
8400 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8401 {
8402 struct plt_entry *ent;
8403 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8404 ent != NULL;
8405 ent = ent->next)
8406 if (ent->addend == 0)
8407 {
8408 if (ent->plt.refcount > 0)
8409 ent->plt.refcount -= 1;
8410 break;
8411 }
8412 }
8413
8414 if (tls_clear == 0)
8415 continue;
8416
8417 if ((tls_set & TLS_EXPLICIT) == 0)
8418 {
8419 struct got_entry *ent;
8420
8421 /* Adjust got entry for this reloc. */
8422 if (h != NULL)
8423 ent = h->got.glist;
8424 else
8425 ent = elf_local_got_ents (ibfd)[r_symndx];
8426
8427 for (; ent != NULL; ent = ent->next)
8428 if (ent->addend == rel->r_addend
8429 && ent->owner == ibfd
8430 && ent->tls_type == tls_type)
8431 break;
8432 if (ent == NULL)
8433 abort ();
8434
8435 if (tls_set == 0)
8436 {
8437 /* We managed to get rid of a got entry. */
8438 if (ent->got.refcount > 0)
8439 ent->got.refcount -= 1;
8440 }
8441 }
8442 else
8443 {
8444 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8445 we'll lose one or two dyn relocs. */
8446 if (!dec_dynrel_count (rel->r_info, sec, info,
8447 NULL, h, sym))
8448 return FALSE;
8449
8450 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8451 {
8452 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8453 NULL, h, sym))
8454 return FALSE;
8455 }
8456 }
8457
8458 *tls_mask |= tls_set;
8459 *tls_mask &= ~tls_clear;
8460 }
8461
8462 if (elf_section_data (sec)->relocs != relstart)
8463 free (relstart);
8464 }
8465
8466 if (locsyms != NULL
8467 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8468 {
8469 if (!info->keep_memory)
8470 free (locsyms);
8471 else
8472 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8473 }
8474 }
8475
8476 if (toc_ref != NULL)
8477 free (toc_ref);
8478 return TRUE;
8479 }
8480
8481 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8482 the values of any global symbols in a toc section that has been
8483 edited. Globals in toc sections should be a rarity, so this function
8484 sets a flag if any are found in toc sections other than the one just
8485 edited, so that futher hash table traversals can be avoided. */
8486
8487 struct adjust_toc_info
8488 {
8489 asection *toc;
8490 unsigned long *skip;
8491 bfd_boolean global_toc_syms;
8492 };
8493
8494 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8495
8496 static bfd_boolean
8497 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8498 {
8499 struct ppc_link_hash_entry *eh;
8500 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8501 unsigned long i;
8502
8503 if (h->root.type != bfd_link_hash_defined
8504 && h->root.type != bfd_link_hash_defweak)
8505 return TRUE;
8506
8507 eh = (struct ppc_link_hash_entry *) h;
8508 if (eh->adjust_done)
8509 return TRUE;
8510
8511 if (eh->elf.root.u.def.section == toc_inf->toc)
8512 {
8513 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8514 i = toc_inf->toc->rawsize >> 3;
8515 else
8516 i = eh->elf.root.u.def.value >> 3;
8517
8518 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8519 {
8520 (*_bfd_error_handler)
8521 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8522 do
8523 ++i;
8524 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8525 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8526 }
8527
8528 eh->elf.root.u.def.value -= toc_inf->skip[i];
8529 eh->adjust_done = 1;
8530 }
8531 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8532 toc_inf->global_toc_syms = TRUE;
8533
8534 return TRUE;
8535 }
8536
8537 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8538
8539 static bfd_boolean
8540 ok_lo_toc_insn (unsigned int insn)
8541 {
8542 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8543 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8544 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8545 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8546 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8547 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8548 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8549 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8550 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8551 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8552 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8553 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8554 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8555 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8556 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8557 && (insn & 3) != 1)
8558 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8559 && ((insn & 3) == 0 || (insn & 3) == 3))
8560 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8561 }
8562
8563 /* Examine all relocs referencing .toc sections in order to remove
8564 unused .toc entries. */
8565
8566 bfd_boolean
8567 ppc64_elf_edit_toc (struct bfd_link_info *info)
8568 {
8569 bfd *ibfd;
8570 struct adjust_toc_info toc_inf;
8571 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8572
8573 htab->do_toc_opt = 1;
8574 toc_inf.global_toc_syms = TRUE;
8575 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8576 {
8577 asection *toc, *sec;
8578 Elf_Internal_Shdr *symtab_hdr;
8579 Elf_Internal_Sym *local_syms;
8580 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8581 unsigned long *skip, *drop;
8582 unsigned char *used;
8583 unsigned char *keep, last, some_unused;
8584
8585 if (!is_ppc64_elf (ibfd))
8586 continue;
8587
8588 toc = bfd_get_section_by_name (ibfd, ".toc");
8589 if (toc == NULL
8590 || toc->size == 0
8591 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8592 || discarded_section (toc))
8593 continue;
8594
8595 toc_relocs = NULL;
8596 local_syms = NULL;
8597 symtab_hdr = &elf_symtab_hdr (ibfd);
8598
8599 /* Look at sections dropped from the final link. */
8600 skip = NULL;
8601 relstart = NULL;
8602 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8603 {
8604 if (sec->reloc_count == 0
8605 || !discarded_section (sec)
8606 || get_opd_info (sec)
8607 || (sec->flags & SEC_ALLOC) == 0
8608 || (sec->flags & SEC_DEBUGGING) != 0)
8609 continue;
8610
8611 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8612 if (relstart == NULL)
8613 goto error_ret;
8614
8615 /* Run through the relocs to see which toc entries might be
8616 unused. */
8617 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8618 {
8619 enum elf_ppc64_reloc_type r_type;
8620 unsigned long r_symndx;
8621 asection *sym_sec;
8622 struct elf_link_hash_entry *h;
8623 Elf_Internal_Sym *sym;
8624 bfd_vma val;
8625
8626 r_type = ELF64_R_TYPE (rel->r_info);
8627 switch (r_type)
8628 {
8629 default:
8630 continue;
8631
8632 case R_PPC64_TOC16:
8633 case R_PPC64_TOC16_LO:
8634 case R_PPC64_TOC16_HI:
8635 case R_PPC64_TOC16_HA:
8636 case R_PPC64_TOC16_DS:
8637 case R_PPC64_TOC16_LO_DS:
8638 break;
8639 }
8640
8641 r_symndx = ELF64_R_SYM (rel->r_info);
8642 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8643 r_symndx, ibfd))
8644 goto error_ret;
8645
8646 if (sym_sec != toc)
8647 continue;
8648
8649 if (h != NULL)
8650 val = h->root.u.def.value;
8651 else
8652 val = sym->st_value;
8653 val += rel->r_addend;
8654
8655 if (val >= toc->size)
8656 continue;
8657
8658 /* Anything in the toc ought to be aligned to 8 bytes.
8659 If not, don't mark as unused. */
8660 if (val & 7)
8661 continue;
8662
8663 if (skip == NULL)
8664 {
8665 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8666 if (skip == NULL)
8667 goto error_ret;
8668 }
8669
8670 skip[val >> 3] = ref_from_discarded;
8671 }
8672
8673 if (elf_section_data (sec)->relocs != relstart)
8674 free (relstart);
8675 }
8676
8677 /* For largetoc loads of address constants, we can convert
8678 . addis rx,2,addr@got@ha
8679 . ld ry,addr@got@l(rx)
8680 to
8681 . addis rx,2,addr@toc@ha
8682 . addi ry,rx,addr@toc@l
8683 when addr is within 2G of the toc pointer. This then means
8684 that the word storing "addr" in the toc is no longer needed. */
8685
8686 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8687 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8688 && toc->reloc_count != 0)
8689 {
8690 /* Read toc relocs. */
8691 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8692 info->keep_memory);
8693 if (toc_relocs == NULL)
8694 goto error_ret;
8695
8696 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8697 {
8698 enum elf_ppc64_reloc_type r_type;
8699 unsigned long r_symndx;
8700 asection *sym_sec;
8701 struct elf_link_hash_entry *h;
8702 Elf_Internal_Sym *sym;
8703 bfd_vma val, addr;
8704
8705 r_type = ELF64_R_TYPE (rel->r_info);
8706 if (r_type != R_PPC64_ADDR64)
8707 continue;
8708
8709 r_symndx = ELF64_R_SYM (rel->r_info);
8710 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8711 r_symndx, ibfd))
8712 goto error_ret;
8713
8714 if (sym_sec == NULL
8715 || discarded_section (sym_sec))
8716 continue;
8717
8718 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8719 continue;
8720
8721 if (h != NULL)
8722 {
8723 if (h->type == STT_GNU_IFUNC)
8724 continue;
8725 val = h->root.u.def.value;
8726 }
8727 else
8728 {
8729 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8730 continue;
8731 val = sym->st_value;
8732 }
8733 val += rel->r_addend;
8734 val += sym_sec->output_section->vma + sym_sec->output_offset;
8735
8736 /* We don't yet know the exact toc pointer value, but we
8737 know it will be somewhere in the toc section. Don't
8738 optimize if the difference from any possible toc
8739 pointer is outside [ff..f80008000, 7fff7fff]. */
8740 addr = toc->output_section->vma + TOC_BASE_OFF;
8741 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8742 continue;
8743
8744 addr = toc->output_section->vma + toc->output_section->rawsize;
8745 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8746 continue;
8747
8748 if (skip == NULL)
8749 {
8750 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8751 if (skip == NULL)
8752 goto error_ret;
8753 }
8754
8755 skip[rel->r_offset >> 3]
8756 |= can_optimize | ((rel - toc_relocs) << 2);
8757 }
8758 }
8759
8760 if (skip == NULL)
8761 continue;
8762
8763 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8764 if (used == NULL)
8765 {
8766 error_ret:
8767 if (local_syms != NULL
8768 && symtab_hdr->contents != (unsigned char *) local_syms)
8769 free (local_syms);
8770 if (sec != NULL
8771 && relstart != NULL
8772 && elf_section_data (sec)->relocs != relstart)
8773 free (relstart);
8774 if (toc_relocs != NULL
8775 && elf_section_data (toc)->relocs != toc_relocs)
8776 free (toc_relocs);
8777 if (skip != NULL)
8778 free (skip);
8779 return FALSE;
8780 }
8781
8782 /* Now check all kept sections that might reference the toc.
8783 Check the toc itself last. */
8784 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8785 : ibfd->sections);
8786 sec != NULL;
8787 sec = (sec == toc ? NULL
8788 : sec->next == NULL ? toc
8789 : sec->next == toc && toc->next ? toc->next
8790 : sec->next))
8791 {
8792 int repeat;
8793
8794 if (sec->reloc_count == 0
8795 || discarded_section (sec)
8796 || get_opd_info (sec)
8797 || (sec->flags & SEC_ALLOC) == 0
8798 || (sec->flags & SEC_DEBUGGING) != 0)
8799 continue;
8800
8801 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8802 info->keep_memory);
8803 if (relstart == NULL)
8804 {
8805 free (used);
8806 goto error_ret;
8807 }
8808
8809 /* Mark toc entries referenced as used. */
8810 do
8811 {
8812 repeat = 0;
8813 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8814 {
8815 enum elf_ppc64_reloc_type r_type;
8816 unsigned long r_symndx;
8817 asection *sym_sec;
8818 struct elf_link_hash_entry *h;
8819 Elf_Internal_Sym *sym;
8820 bfd_vma val;
8821 enum {no_check, check_lo, check_ha} insn_check;
8822
8823 r_type = ELF64_R_TYPE (rel->r_info);
8824 switch (r_type)
8825 {
8826 default:
8827 insn_check = no_check;
8828 break;
8829
8830 case R_PPC64_GOT_TLSLD16_HA:
8831 case R_PPC64_GOT_TLSGD16_HA:
8832 case R_PPC64_GOT_TPREL16_HA:
8833 case R_PPC64_GOT_DTPREL16_HA:
8834 case R_PPC64_GOT16_HA:
8835 case R_PPC64_TOC16_HA:
8836 insn_check = check_ha;
8837 break;
8838
8839 case R_PPC64_GOT_TLSLD16_LO:
8840 case R_PPC64_GOT_TLSGD16_LO:
8841 case R_PPC64_GOT_TPREL16_LO_DS:
8842 case R_PPC64_GOT_DTPREL16_LO_DS:
8843 case R_PPC64_GOT16_LO:
8844 case R_PPC64_GOT16_LO_DS:
8845 case R_PPC64_TOC16_LO:
8846 case R_PPC64_TOC16_LO_DS:
8847 insn_check = check_lo;
8848 break;
8849 }
8850
8851 if (insn_check != no_check)
8852 {
8853 bfd_vma off = rel->r_offset & ~3;
8854 unsigned char buf[4];
8855 unsigned int insn;
8856
8857 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8858 {
8859 free (used);
8860 goto error_ret;
8861 }
8862 insn = bfd_get_32 (ibfd, buf);
8863 if (insn_check == check_lo
8864 ? !ok_lo_toc_insn (insn)
8865 : ((insn & ((0x3f << 26) | 0x1f << 16))
8866 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8867 {
8868 char str[12];
8869
8870 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8871 sprintf (str, "%#08x", insn);
8872 info->callbacks->einfo
8873 (_("%P: %H: toc optimization is not supported for"
8874 " %s instruction.\n"),
8875 ibfd, sec, rel->r_offset & ~3, str);
8876 }
8877 }
8878
8879 switch (r_type)
8880 {
8881 case R_PPC64_TOC16:
8882 case R_PPC64_TOC16_LO:
8883 case R_PPC64_TOC16_HI:
8884 case R_PPC64_TOC16_HA:
8885 case R_PPC64_TOC16_DS:
8886 case R_PPC64_TOC16_LO_DS:
8887 /* In case we're taking addresses of toc entries. */
8888 case R_PPC64_ADDR64:
8889 break;
8890
8891 default:
8892 continue;
8893 }
8894
8895 r_symndx = ELF64_R_SYM (rel->r_info);
8896 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8897 r_symndx, ibfd))
8898 {
8899 free (used);
8900 goto error_ret;
8901 }
8902
8903 if (sym_sec != toc)
8904 continue;
8905
8906 if (h != NULL)
8907 val = h->root.u.def.value;
8908 else
8909 val = sym->st_value;
8910 val += rel->r_addend;
8911
8912 if (val >= toc->size)
8913 continue;
8914
8915 if ((skip[val >> 3] & can_optimize) != 0)
8916 {
8917 bfd_vma off;
8918 unsigned char opc;
8919
8920 switch (r_type)
8921 {
8922 case R_PPC64_TOC16_HA:
8923 break;
8924
8925 case R_PPC64_TOC16_LO_DS:
8926 off = rel->r_offset;
8927 off += (bfd_big_endian (ibfd) ? -2 : 3);
8928 if (!bfd_get_section_contents (ibfd, sec, &opc,
8929 off, 1))
8930 {
8931 free (used);
8932 goto error_ret;
8933 }
8934 if ((opc & (0x3f << 2)) == (58u << 2))
8935 break;
8936 /* Fall thru */
8937
8938 default:
8939 /* Wrong sort of reloc, or not a ld. We may
8940 as well clear ref_from_discarded too. */
8941 skip[val >> 3] = 0;
8942 }
8943 }
8944
8945 if (sec != toc)
8946 used[val >> 3] = 1;
8947 /* For the toc section, we only mark as used if this
8948 entry itself isn't unused. */
8949 else if ((used[rel->r_offset >> 3]
8950 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8951 && !used[val >> 3])
8952 {
8953 /* Do all the relocs again, to catch reference
8954 chains. */
8955 repeat = 1;
8956 used[val >> 3] = 1;
8957 }
8958 }
8959 }
8960 while (repeat);
8961
8962 if (elf_section_data (sec)->relocs != relstart)
8963 free (relstart);
8964 }
8965
8966 /* Merge the used and skip arrays. Assume that TOC
8967 doublewords not appearing as either used or unused belong
8968 to to an entry more than one doubleword in size. */
8969 for (drop = skip, keep = used, last = 0, some_unused = 0;
8970 drop < skip + (toc->size + 7) / 8;
8971 ++drop, ++keep)
8972 {
8973 if (*keep)
8974 {
8975 *drop &= ~ref_from_discarded;
8976 if ((*drop & can_optimize) != 0)
8977 some_unused = 1;
8978 last = 0;
8979 }
8980 else if ((*drop & ref_from_discarded) != 0)
8981 {
8982 some_unused = 1;
8983 last = ref_from_discarded;
8984 }
8985 else
8986 *drop = last;
8987 }
8988
8989 free (used);
8990
8991 if (some_unused)
8992 {
8993 bfd_byte *contents, *src;
8994 unsigned long off;
8995 Elf_Internal_Sym *sym;
8996 bfd_boolean local_toc_syms = FALSE;
8997
8998 /* Shuffle the toc contents, and at the same time convert the
8999 skip array from booleans into offsets. */
9000 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9001 goto error_ret;
9002
9003 elf_section_data (toc)->this_hdr.contents = contents;
9004
9005 for (src = contents, off = 0, drop = skip;
9006 src < contents + toc->size;
9007 src += 8, ++drop)
9008 {
9009 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9010 off += 8;
9011 else if (off != 0)
9012 {
9013 *drop = off;
9014 memcpy (src - off, src, 8);
9015 }
9016 }
9017 *drop = off;
9018 toc->rawsize = toc->size;
9019 toc->size = src - contents - off;
9020
9021 /* Adjust addends for relocs against the toc section sym,
9022 and optimize any accesses we can. */
9023 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9024 {
9025 if (sec->reloc_count == 0
9026 || discarded_section (sec))
9027 continue;
9028
9029 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9030 info->keep_memory);
9031 if (relstart == NULL)
9032 goto error_ret;
9033
9034 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9035 {
9036 enum elf_ppc64_reloc_type r_type;
9037 unsigned long r_symndx;
9038 asection *sym_sec;
9039 struct elf_link_hash_entry *h;
9040 bfd_vma val;
9041
9042 r_type = ELF64_R_TYPE (rel->r_info);
9043 switch (r_type)
9044 {
9045 default:
9046 continue;
9047
9048 case R_PPC64_TOC16:
9049 case R_PPC64_TOC16_LO:
9050 case R_PPC64_TOC16_HI:
9051 case R_PPC64_TOC16_HA:
9052 case R_PPC64_TOC16_DS:
9053 case R_PPC64_TOC16_LO_DS:
9054 case R_PPC64_ADDR64:
9055 break;
9056 }
9057
9058 r_symndx = ELF64_R_SYM (rel->r_info);
9059 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9060 r_symndx, ibfd))
9061 goto error_ret;
9062
9063 if (sym_sec != toc)
9064 continue;
9065
9066 if (h != NULL)
9067 val = h->root.u.def.value;
9068 else
9069 {
9070 val = sym->st_value;
9071 if (val != 0)
9072 local_toc_syms = TRUE;
9073 }
9074
9075 val += rel->r_addend;
9076
9077 if (val > toc->rawsize)
9078 val = toc->rawsize;
9079 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9080 continue;
9081 else if ((skip[val >> 3] & can_optimize) != 0)
9082 {
9083 Elf_Internal_Rela *tocrel
9084 = toc_relocs + (skip[val >> 3] >> 2);
9085 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9086
9087 switch (r_type)
9088 {
9089 case R_PPC64_TOC16_HA:
9090 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9091 break;
9092
9093 case R_PPC64_TOC16_LO_DS:
9094 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9095 break;
9096
9097 default:
9098 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9099 ppc_howto_init ();
9100 info->callbacks->einfo
9101 (_("%P: %H: %s references "
9102 "optimized away TOC entry\n"),
9103 ibfd, sec, rel->r_offset,
9104 ppc64_elf_howto_table[r_type]->name);
9105 bfd_set_error (bfd_error_bad_value);
9106 goto error_ret;
9107 }
9108 rel->r_addend = tocrel->r_addend;
9109 elf_section_data (sec)->relocs = relstart;
9110 continue;
9111 }
9112
9113 if (h != NULL || sym->st_value != 0)
9114 continue;
9115
9116 rel->r_addend -= skip[val >> 3];
9117 elf_section_data (sec)->relocs = relstart;
9118 }
9119
9120 if (elf_section_data (sec)->relocs != relstart)
9121 free (relstart);
9122 }
9123
9124 /* We shouldn't have local or global symbols defined in the TOC,
9125 but handle them anyway. */
9126 if (local_syms != NULL)
9127 for (sym = local_syms;
9128 sym < local_syms + symtab_hdr->sh_info;
9129 ++sym)
9130 if (sym->st_value != 0
9131 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9132 {
9133 unsigned long i;
9134
9135 if (sym->st_value > toc->rawsize)
9136 i = toc->rawsize >> 3;
9137 else
9138 i = sym->st_value >> 3;
9139
9140 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9141 {
9142 if (local_toc_syms)
9143 (*_bfd_error_handler)
9144 (_("%s defined on removed toc entry"),
9145 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9146 do
9147 ++i;
9148 while ((skip[i] & (ref_from_discarded | can_optimize)));
9149 sym->st_value = (bfd_vma) i << 3;
9150 }
9151
9152 sym->st_value -= skip[i];
9153 symtab_hdr->contents = (unsigned char *) local_syms;
9154 }
9155
9156 /* Adjust any global syms defined in this toc input section. */
9157 if (toc_inf.global_toc_syms)
9158 {
9159 toc_inf.toc = toc;
9160 toc_inf.skip = skip;
9161 toc_inf.global_toc_syms = FALSE;
9162 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9163 &toc_inf);
9164 }
9165
9166 if (toc->reloc_count != 0)
9167 {
9168 Elf_Internal_Shdr *rel_hdr;
9169 Elf_Internal_Rela *wrel;
9170 bfd_size_type sz;
9171
9172 /* Remove unused toc relocs, and adjust those we keep. */
9173 if (toc_relocs == NULL)
9174 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9175 info->keep_memory);
9176 if (toc_relocs == NULL)
9177 goto error_ret;
9178
9179 wrel = toc_relocs;
9180 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9181 if ((skip[rel->r_offset >> 3]
9182 & (ref_from_discarded | can_optimize)) == 0)
9183 {
9184 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9185 wrel->r_info = rel->r_info;
9186 wrel->r_addend = rel->r_addend;
9187 ++wrel;
9188 }
9189 else if (!dec_dynrel_count (rel->r_info, toc, info,
9190 &local_syms, NULL, NULL))
9191 goto error_ret;
9192
9193 elf_section_data (toc)->relocs = toc_relocs;
9194 toc->reloc_count = wrel - toc_relocs;
9195 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9196 sz = rel_hdr->sh_entsize;
9197 rel_hdr->sh_size = toc->reloc_count * sz;
9198 }
9199 }
9200 else if (toc_relocs != NULL
9201 && elf_section_data (toc)->relocs != toc_relocs)
9202 free (toc_relocs);
9203
9204 if (local_syms != NULL
9205 && symtab_hdr->contents != (unsigned char *) local_syms)
9206 {
9207 if (!info->keep_memory)
9208 free (local_syms);
9209 else
9210 symtab_hdr->contents = (unsigned char *) local_syms;
9211 }
9212 free (skip);
9213 }
9214
9215 return TRUE;
9216 }
9217
9218 /* Return true iff input section I references the TOC using
9219 instructions limited to +/-32k offsets. */
9220
9221 bfd_boolean
9222 ppc64_elf_has_small_toc_reloc (asection *i)
9223 {
9224 return (is_ppc64_elf (i->owner)
9225 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9226 }
9227
9228 /* Allocate space for one GOT entry. */
9229
9230 static void
9231 allocate_got (struct elf_link_hash_entry *h,
9232 struct bfd_link_info *info,
9233 struct got_entry *gent)
9234 {
9235 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9236 bfd_boolean dyn;
9237 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9238 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9239 ? 16 : 8);
9240 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9241 ? 2 : 1) * sizeof (Elf64_External_Rela);
9242 asection *got = ppc64_elf_tdata (gent->owner)->got;
9243
9244 gent->got.offset = got->size;
9245 got->size += entsize;
9246
9247 dyn = htab->elf.dynamic_sections_created;
9248 if (h->type == STT_GNU_IFUNC)
9249 {
9250 htab->elf.irelplt->size += rentsize;
9251 htab->got_reli_size += rentsize;
9252 }
9253 else if ((info->shared
9254 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9255 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9256 || h->root.type != bfd_link_hash_undefweak))
9257 {
9258 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9259 relgot->size += rentsize;
9260 }
9261 }
9262
9263 /* This function merges got entries in the same toc group. */
9264
9265 static void
9266 merge_got_entries (struct got_entry **pent)
9267 {
9268 struct got_entry *ent, *ent2;
9269
9270 for (ent = *pent; ent != NULL; ent = ent->next)
9271 if (!ent->is_indirect)
9272 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9273 if (!ent2->is_indirect
9274 && ent2->addend == ent->addend
9275 && ent2->tls_type == ent->tls_type
9276 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9277 {
9278 ent2->is_indirect = TRUE;
9279 ent2->got.ent = ent;
9280 }
9281 }
9282
9283 /* Allocate space in .plt, .got and associated reloc sections for
9284 dynamic relocs. */
9285
9286 static bfd_boolean
9287 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9288 {
9289 struct bfd_link_info *info;
9290 struct ppc_link_hash_table *htab;
9291 asection *s;
9292 struct ppc_link_hash_entry *eh;
9293 struct elf_dyn_relocs *p;
9294 struct got_entry **pgent, *gent;
9295
9296 if (h->root.type == bfd_link_hash_indirect)
9297 return TRUE;
9298
9299 info = (struct bfd_link_info *) inf;
9300 htab = ppc_hash_table (info);
9301 if (htab == NULL)
9302 return FALSE;
9303
9304 if ((htab->elf.dynamic_sections_created
9305 && h->dynindx != -1
9306 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9307 || h->type == STT_GNU_IFUNC)
9308 {
9309 struct plt_entry *pent;
9310 bfd_boolean doneone = FALSE;
9311 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9312 if (pent->plt.refcount > 0)
9313 {
9314 if (!htab->elf.dynamic_sections_created
9315 || h->dynindx == -1)
9316 {
9317 s = htab->elf.iplt;
9318 pent->plt.offset = s->size;
9319 s->size += PLT_ENTRY_SIZE (htab);
9320 s = htab->elf.irelplt;
9321 }
9322 else
9323 {
9324 /* If this is the first .plt entry, make room for the special
9325 first entry. */
9326 s = htab->elf.splt;
9327 if (s->size == 0)
9328 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9329
9330 pent->plt.offset = s->size;
9331
9332 /* Make room for this entry. */
9333 s->size += PLT_ENTRY_SIZE (htab);
9334
9335 /* Make room for the .glink code. */
9336 s = htab->glink;
9337 if (s->size == 0)
9338 s->size += GLINK_CALL_STUB_SIZE;
9339 if (htab->opd_abi)
9340 {
9341 /* We need bigger stubs past index 32767. */
9342 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9343 s->size += 4;
9344 s->size += 2*4;
9345 }
9346 else
9347 s->size += 4;
9348
9349 /* We also need to make an entry in the .rela.plt section. */
9350 s = htab->elf.srelplt;
9351 }
9352 s->size += sizeof (Elf64_External_Rela);
9353 doneone = TRUE;
9354 }
9355 else
9356 pent->plt.offset = (bfd_vma) -1;
9357 if (!doneone)
9358 {
9359 h->plt.plist = NULL;
9360 h->needs_plt = 0;
9361 }
9362 }
9363 else
9364 {
9365 h->plt.plist = NULL;
9366 h->needs_plt = 0;
9367 }
9368
9369 eh = (struct ppc_link_hash_entry *) h;
9370 /* Run through the TLS GD got entries first if we're changing them
9371 to TPREL. */
9372 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9373 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9374 if (gent->got.refcount > 0
9375 && (gent->tls_type & TLS_GD) != 0)
9376 {
9377 /* This was a GD entry that has been converted to TPREL. If
9378 there happens to be a TPREL entry we can use that one. */
9379 struct got_entry *ent;
9380 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9381 if (ent->got.refcount > 0
9382 && (ent->tls_type & TLS_TPREL) != 0
9383 && ent->addend == gent->addend
9384 && ent->owner == gent->owner)
9385 {
9386 gent->got.refcount = 0;
9387 break;
9388 }
9389
9390 /* If not, then we'll be using our own TPREL entry. */
9391 if (gent->got.refcount != 0)
9392 gent->tls_type = TLS_TLS | TLS_TPREL;
9393 }
9394
9395 /* Remove any list entry that won't generate a word in the GOT before
9396 we call merge_got_entries. Otherwise we risk merging to empty
9397 entries. */
9398 pgent = &h->got.glist;
9399 while ((gent = *pgent) != NULL)
9400 if (gent->got.refcount > 0)
9401 {
9402 if ((gent->tls_type & TLS_LD) != 0
9403 && !h->def_dynamic)
9404 {
9405 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9406 *pgent = gent->next;
9407 }
9408 else
9409 pgent = &gent->next;
9410 }
9411 else
9412 *pgent = gent->next;
9413
9414 if (!htab->do_multi_toc)
9415 merge_got_entries (&h->got.glist);
9416
9417 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9418 if (!gent->is_indirect)
9419 {
9420 /* Make sure this symbol is output as a dynamic symbol.
9421 Undefined weak syms won't yet be marked as dynamic,
9422 nor will all TLS symbols. */
9423 if (h->dynindx == -1
9424 && !h->forced_local
9425 && h->type != STT_GNU_IFUNC
9426 && htab->elf.dynamic_sections_created)
9427 {
9428 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9429 return FALSE;
9430 }
9431
9432 if (!is_ppc64_elf (gent->owner))
9433 abort ();
9434
9435 allocate_got (h, info, gent);
9436 }
9437
9438 if (eh->dyn_relocs == NULL
9439 || (!htab->elf.dynamic_sections_created
9440 && h->type != STT_GNU_IFUNC))
9441 return TRUE;
9442
9443 /* In the shared -Bsymbolic case, discard space allocated for
9444 dynamic pc-relative relocs against symbols which turn out to be
9445 defined in regular objects. For the normal shared case, discard
9446 space for relocs that have become local due to symbol visibility
9447 changes. */
9448
9449 if (info->shared)
9450 {
9451 /* Relocs that use pc_count are those that appear on a call insn,
9452 or certain REL relocs (see must_be_dyn_reloc) that can be
9453 generated via assembly. We want calls to protected symbols to
9454 resolve directly to the function rather than going via the plt.
9455 If people want function pointer comparisons to work as expected
9456 then they should avoid writing weird assembly. */
9457 if (SYMBOL_CALLS_LOCAL (info, h))
9458 {
9459 struct elf_dyn_relocs **pp;
9460
9461 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9462 {
9463 p->count -= p->pc_count;
9464 p->pc_count = 0;
9465 if (p->count == 0)
9466 *pp = p->next;
9467 else
9468 pp = &p->next;
9469 }
9470 }
9471
9472 /* Also discard relocs on undefined weak syms with non-default
9473 visibility. */
9474 if (eh->dyn_relocs != NULL
9475 && h->root.type == bfd_link_hash_undefweak)
9476 {
9477 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9478 eh->dyn_relocs = NULL;
9479
9480 /* Make sure this symbol is output as a dynamic symbol.
9481 Undefined weak syms won't yet be marked as dynamic. */
9482 else if (h->dynindx == -1
9483 && !h->forced_local)
9484 {
9485 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9486 return FALSE;
9487 }
9488 }
9489 }
9490 else if (h->type == STT_GNU_IFUNC)
9491 {
9492 if (!h->non_got_ref)
9493 eh->dyn_relocs = NULL;
9494 }
9495 else if (ELIMINATE_COPY_RELOCS)
9496 {
9497 /* For the non-shared case, discard space for relocs against
9498 symbols which turn out to need copy relocs or are not
9499 dynamic. */
9500
9501 if (!h->non_got_ref
9502 && !h->def_regular)
9503 {
9504 /* Make sure this symbol is output as a dynamic symbol.
9505 Undefined weak syms won't yet be marked as dynamic. */
9506 if (h->dynindx == -1
9507 && !h->forced_local)
9508 {
9509 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9510 return FALSE;
9511 }
9512
9513 /* If that succeeded, we know we'll be keeping all the
9514 relocs. */
9515 if (h->dynindx != -1)
9516 goto keep;
9517 }
9518
9519 eh->dyn_relocs = NULL;
9520
9521 keep: ;
9522 }
9523
9524 /* Finally, allocate space. */
9525 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9526 {
9527 asection *sreloc = elf_section_data (p->sec)->sreloc;
9528 if (eh->elf.type == STT_GNU_IFUNC)
9529 sreloc = htab->elf.irelplt;
9530 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9531 }
9532
9533 return TRUE;
9534 }
9535
9536 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9537 to set up space for global entry stubs. These are put in glink,
9538 after the branch table. */
9539
9540 static bfd_boolean
9541 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9542 {
9543 struct bfd_link_info *info;
9544 struct ppc_link_hash_table *htab;
9545 struct plt_entry *pent;
9546 asection *s;
9547
9548 if (h->root.type == bfd_link_hash_indirect)
9549 return TRUE;
9550
9551 if (!h->pointer_equality_needed)
9552 return TRUE;
9553
9554 if (h->def_regular)
9555 return TRUE;
9556
9557 info = inf;
9558 htab = ppc_hash_table (info);
9559 if (htab == NULL)
9560 return FALSE;
9561
9562 s = htab->glink;
9563 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9564 if (pent->plt.offset != (bfd_vma) -1
9565 && pent->addend == 0)
9566 {
9567 /* For ELFv2, if this symbol is not defined in a regular file
9568 and we are not generating a shared library or pie, then we
9569 need to define the symbol in the executable on a call stub.
9570 This is to avoid text relocations. */
9571 s->size = (s->size + 15) & -16;
9572 h->root.u.def.section = s;
9573 h->root.u.def.value = s->size;
9574 s->size += 16;
9575 break;
9576 }
9577 return TRUE;
9578 }
9579
9580 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9581 read-only sections. */
9582
9583 static bfd_boolean
9584 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9585 {
9586 if (h->root.type == bfd_link_hash_indirect)
9587 return TRUE;
9588
9589 if (readonly_dynrelocs (h))
9590 {
9591 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9592
9593 /* Not an error, just cut short the traversal. */
9594 return FALSE;
9595 }
9596 return TRUE;
9597 }
9598
9599 /* Set the sizes of the dynamic sections. */
9600
9601 static bfd_boolean
9602 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9603 struct bfd_link_info *info)
9604 {
9605 struct ppc_link_hash_table *htab;
9606 bfd *dynobj;
9607 asection *s;
9608 bfd_boolean relocs;
9609 bfd *ibfd;
9610 struct got_entry *first_tlsld;
9611
9612 htab = ppc_hash_table (info);
9613 if (htab == NULL)
9614 return FALSE;
9615
9616 dynobj = htab->elf.dynobj;
9617 if (dynobj == NULL)
9618 abort ();
9619
9620 if (htab->elf.dynamic_sections_created)
9621 {
9622 /* Set the contents of the .interp section to the interpreter. */
9623 if (info->executable)
9624 {
9625 s = bfd_get_linker_section (dynobj, ".interp");
9626 if (s == NULL)
9627 abort ();
9628 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9629 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9630 }
9631 }
9632
9633 /* Set up .got offsets for local syms, and space for local dynamic
9634 relocs. */
9635 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9636 {
9637 struct got_entry **lgot_ents;
9638 struct got_entry **end_lgot_ents;
9639 struct plt_entry **local_plt;
9640 struct plt_entry **end_local_plt;
9641 unsigned char *lgot_masks;
9642 bfd_size_type locsymcount;
9643 Elf_Internal_Shdr *symtab_hdr;
9644
9645 if (!is_ppc64_elf (ibfd))
9646 continue;
9647
9648 for (s = ibfd->sections; s != NULL; s = s->next)
9649 {
9650 struct ppc_dyn_relocs *p;
9651
9652 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9653 {
9654 if (!bfd_is_abs_section (p->sec)
9655 && bfd_is_abs_section (p->sec->output_section))
9656 {
9657 /* Input section has been discarded, either because
9658 it is a copy of a linkonce section or due to
9659 linker script /DISCARD/, so we'll be discarding
9660 the relocs too. */
9661 }
9662 else if (p->count != 0)
9663 {
9664 asection *srel = elf_section_data (p->sec)->sreloc;
9665 if (p->ifunc)
9666 srel = htab->elf.irelplt;
9667 srel->size += p->count * sizeof (Elf64_External_Rela);
9668 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9669 info->flags |= DF_TEXTREL;
9670 }
9671 }
9672 }
9673
9674 lgot_ents = elf_local_got_ents (ibfd);
9675 if (!lgot_ents)
9676 continue;
9677
9678 symtab_hdr = &elf_symtab_hdr (ibfd);
9679 locsymcount = symtab_hdr->sh_info;
9680 end_lgot_ents = lgot_ents + locsymcount;
9681 local_plt = (struct plt_entry **) end_lgot_ents;
9682 end_local_plt = local_plt + locsymcount;
9683 lgot_masks = (unsigned char *) end_local_plt;
9684 s = ppc64_elf_tdata (ibfd)->got;
9685 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9686 {
9687 struct got_entry **pent, *ent;
9688
9689 pent = lgot_ents;
9690 while ((ent = *pent) != NULL)
9691 if (ent->got.refcount > 0)
9692 {
9693 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9694 {
9695 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9696 *pent = ent->next;
9697 }
9698 else
9699 {
9700 unsigned int ent_size = 8;
9701 unsigned int rel_size = sizeof (Elf64_External_Rela);
9702
9703 ent->got.offset = s->size;
9704 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9705 {
9706 ent_size *= 2;
9707 rel_size *= 2;
9708 }
9709 s->size += ent_size;
9710 if ((*lgot_masks & PLT_IFUNC) != 0)
9711 {
9712 htab->elf.irelplt->size += rel_size;
9713 htab->got_reli_size += rel_size;
9714 }
9715 else if (info->shared)
9716 {
9717 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9718 srel->size += rel_size;
9719 }
9720 pent = &ent->next;
9721 }
9722 }
9723 else
9724 *pent = ent->next;
9725 }
9726
9727 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9728 for (; local_plt < end_local_plt; ++local_plt)
9729 {
9730 struct plt_entry *ent;
9731
9732 for (ent = *local_plt; ent != NULL; ent = ent->next)
9733 if (ent->plt.refcount > 0)
9734 {
9735 s = htab->elf.iplt;
9736 ent->plt.offset = s->size;
9737 s->size += PLT_ENTRY_SIZE (htab);
9738
9739 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9740 }
9741 else
9742 ent->plt.offset = (bfd_vma) -1;
9743 }
9744 }
9745
9746 /* Allocate global sym .plt and .got entries, and space for global
9747 sym dynamic relocs. */
9748 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9749 /* Stash the end of glink branch table. */
9750 if (htab->glink != NULL)
9751 htab->glink->rawsize = htab->glink->size;
9752
9753 if (!htab->opd_abi && !info->shared)
9754 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9755
9756 first_tlsld = NULL;
9757 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9758 {
9759 struct got_entry *ent;
9760
9761 if (!is_ppc64_elf (ibfd))
9762 continue;
9763
9764 ent = ppc64_tlsld_got (ibfd);
9765 if (ent->got.refcount > 0)
9766 {
9767 if (!htab->do_multi_toc && first_tlsld != NULL)
9768 {
9769 ent->is_indirect = TRUE;
9770 ent->got.ent = first_tlsld;
9771 }
9772 else
9773 {
9774 if (first_tlsld == NULL)
9775 first_tlsld = ent;
9776 s = ppc64_elf_tdata (ibfd)->got;
9777 ent->got.offset = s->size;
9778 ent->owner = ibfd;
9779 s->size += 16;
9780 if (info->shared)
9781 {
9782 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9783 srel->size += sizeof (Elf64_External_Rela);
9784 }
9785 }
9786 }
9787 else
9788 ent->got.offset = (bfd_vma) -1;
9789 }
9790
9791 /* We now have determined the sizes of the various dynamic sections.
9792 Allocate memory for them. */
9793 relocs = FALSE;
9794 for (s = dynobj->sections; s != NULL; s = s->next)
9795 {
9796 if ((s->flags & SEC_LINKER_CREATED) == 0)
9797 continue;
9798
9799 if (s == htab->brlt || s == htab->relbrlt)
9800 /* These haven't been allocated yet; don't strip. */
9801 continue;
9802 else if (s == htab->elf.sgot
9803 || s == htab->elf.splt
9804 || s == htab->elf.iplt
9805 || s == htab->glink
9806 || s == htab->dynbss)
9807 {
9808 /* Strip this section if we don't need it; see the
9809 comment below. */
9810 }
9811 else if (s == htab->glink_eh_frame)
9812 {
9813 if (!bfd_is_abs_section (s->output_section))
9814 /* Not sized yet. */
9815 continue;
9816 }
9817 else if (CONST_STRNEQ (s->name, ".rela"))
9818 {
9819 if (s->size != 0)
9820 {
9821 if (s != htab->elf.srelplt)
9822 relocs = TRUE;
9823
9824 /* We use the reloc_count field as a counter if we need
9825 to copy relocs into the output file. */
9826 s->reloc_count = 0;
9827 }
9828 }
9829 else
9830 {
9831 /* It's not one of our sections, so don't allocate space. */
9832 continue;
9833 }
9834
9835 if (s->size == 0)
9836 {
9837 /* If we don't need this section, strip it from the
9838 output file. This is mostly to handle .rela.bss and
9839 .rela.plt. We must create both sections in
9840 create_dynamic_sections, because they must be created
9841 before the linker maps input sections to output
9842 sections. The linker does that before
9843 adjust_dynamic_symbol is called, and it is that
9844 function which decides whether anything needs to go
9845 into these sections. */
9846 s->flags |= SEC_EXCLUDE;
9847 continue;
9848 }
9849
9850 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9851 continue;
9852
9853 /* Allocate memory for the section contents. We use bfd_zalloc
9854 here in case unused entries are not reclaimed before the
9855 section's contents are written out. This should not happen,
9856 but this way if it does we get a R_PPC64_NONE reloc in .rela
9857 sections instead of garbage.
9858 We also rely on the section contents being zero when writing
9859 the GOT. */
9860 s->contents = bfd_zalloc (dynobj, s->size);
9861 if (s->contents == NULL)
9862 return FALSE;
9863 }
9864
9865 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9866 {
9867 if (!is_ppc64_elf (ibfd))
9868 continue;
9869
9870 s = ppc64_elf_tdata (ibfd)->got;
9871 if (s != NULL && s != htab->elf.sgot)
9872 {
9873 if (s->size == 0)
9874 s->flags |= SEC_EXCLUDE;
9875 else
9876 {
9877 s->contents = bfd_zalloc (ibfd, s->size);
9878 if (s->contents == NULL)
9879 return FALSE;
9880 }
9881 }
9882 s = ppc64_elf_tdata (ibfd)->relgot;
9883 if (s != NULL)
9884 {
9885 if (s->size == 0)
9886 s->flags |= SEC_EXCLUDE;
9887 else
9888 {
9889 s->contents = bfd_zalloc (ibfd, s->size);
9890 if (s->contents == NULL)
9891 return FALSE;
9892 relocs = TRUE;
9893 s->reloc_count = 0;
9894 }
9895 }
9896 }
9897
9898 if (htab->elf.dynamic_sections_created)
9899 {
9900 bfd_boolean tls_opt;
9901
9902 /* Add some entries to the .dynamic section. We fill in the
9903 values later, in ppc64_elf_finish_dynamic_sections, but we
9904 must add the entries now so that we get the correct size for
9905 the .dynamic section. The DT_DEBUG entry is filled in by the
9906 dynamic linker and used by the debugger. */
9907 #define add_dynamic_entry(TAG, VAL) \
9908 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9909
9910 if (info->executable)
9911 {
9912 if (!add_dynamic_entry (DT_DEBUG, 0))
9913 return FALSE;
9914 }
9915
9916 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9917 {
9918 if (!add_dynamic_entry (DT_PLTGOT, 0)
9919 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9920 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9921 || !add_dynamic_entry (DT_JMPREL, 0)
9922 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9923 return FALSE;
9924 }
9925
9926 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9927 {
9928 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9929 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9930 return FALSE;
9931 }
9932
9933 tls_opt = (!htab->no_tls_get_addr_opt
9934 && htab->tls_get_addr_fd != NULL
9935 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
9936 if (tls_opt || !htab->opd_abi)
9937 {
9938 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
9939 return FALSE;
9940 }
9941
9942 if (relocs)
9943 {
9944 if (!add_dynamic_entry (DT_RELA, 0)
9945 || !add_dynamic_entry (DT_RELASZ, 0)
9946 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9947 return FALSE;
9948
9949 /* If any dynamic relocs apply to a read-only section,
9950 then we need a DT_TEXTREL entry. */
9951 if ((info->flags & DF_TEXTREL) == 0)
9952 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
9953
9954 if ((info->flags & DF_TEXTREL) != 0)
9955 {
9956 if (!add_dynamic_entry (DT_TEXTREL, 0))
9957 return FALSE;
9958 }
9959 }
9960 }
9961 #undef add_dynamic_entry
9962
9963 return TRUE;
9964 }
9965
9966 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
9967
9968 static bfd_boolean
9969 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
9970 {
9971 if (h->plt.plist != NULL
9972 && !h->def_regular
9973 && !h->pointer_equality_needed)
9974 return FALSE;
9975
9976 return _bfd_elf_hash_symbol (h);
9977 }
9978
9979 /* Determine the type of stub needed, if any, for a call. */
9980
9981 static inline enum ppc_stub_type
9982 ppc_type_of_stub (asection *input_sec,
9983 const Elf_Internal_Rela *rel,
9984 struct ppc_link_hash_entry **hash,
9985 struct plt_entry **plt_ent,
9986 bfd_vma destination,
9987 unsigned long local_off)
9988 {
9989 struct ppc_link_hash_entry *h = *hash;
9990 bfd_vma location;
9991 bfd_vma branch_offset;
9992 bfd_vma max_branch_offset;
9993 enum elf_ppc64_reloc_type r_type;
9994
9995 if (h != NULL)
9996 {
9997 struct plt_entry *ent;
9998 struct ppc_link_hash_entry *fdh = h;
9999 if (h->oh != NULL
10000 && h->oh->is_func_descriptor)
10001 {
10002 fdh = ppc_follow_link (h->oh);
10003 *hash = fdh;
10004 }
10005
10006 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10007 if (ent->addend == rel->r_addend
10008 && ent->plt.offset != (bfd_vma) -1)
10009 {
10010 *plt_ent = ent;
10011 return ppc_stub_plt_call;
10012 }
10013
10014 /* Here, we know we don't have a plt entry. If we don't have a
10015 either a defined function descriptor or a defined entry symbol
10016 in a regular object file, then it is pointless trying to make
10017 any other type of stub. */
10018 if (!is_static_defined (&fdh->elf)
10019 && !is_static_defined (&h->elf))
10020 return ppc_stub_none;
10021 }
10022 else if (elf_local_got_ents (input_sec->owner) != NULL)
10023 {
10024 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10025 struct plt_entry **local_plt = (struct plt_entry **)
10026 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10027 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10028
10029 if (local_plt[r_symndx] != NULL)
10030 {
10031 struct plt_entry *ent;
10032
10033 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10034 if (ent->addend == rel->r_addend
10035 && ent->plt.offset != (bfd_vma) -1)
10036 {
10037 *plt_ent = ent;
10038 return ppc_stub_plt_call;
10039 }
10040 }
10041 }
10042
10043 /* Determine where the call point is. */
10044 location = (input_sec->output_offset
10045 + input_sec->output_section->vma
10046 + rel->r_offset);
10047
10048 branch_offset = destination - location;
10049 r_type = ELF64_R_TYPE (rel->r_info);
10050
10051 /* Determine if a long branch stub is needed. */
10052 max_branch_offset = 1 << 25;
10053 if (r_type != R_PPC64_REL24)
10054 max_branch_offset = 1 << 15;
10055
10056 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10057 /* We need a stub. Figure out whether a long_branch or plt_branch
10058 is needed later. */
10059 return ppc_stub_long_branch;
10060
10061 return ppc_stub_none;
10062 }
10063
10064 /* With power7 weakly ordered memory model, it is possible for ld.so
10065 to update a plt entry in one thread and have another thread see a
10066 stale zero toc entry. To avoid this we need some sort of acquire
10067 barrier in the call stub. One solution is to make the load of the
10068 toc word seem to appear to depend on the load of the function entry
10069 word. Another solution is to test for r2 being zero, and branch to
10070 the appropriate glink entry if so.
10071
10072 . fake dep barrier compare
10073 . ld 12,xxx(2) ld 12,xxx(2)
10074 . mtctr 12 mtctr 12
10075 . xor 11,12,12 ld 2,xxx+8(2)
10076 . add 2,2,11 cmpldi 2,0
10077 . ld 2,xxx+8(2) bnectr+
10078 . bctr b <glink_entry>
10079
10080 The solution involving the compare turns out to be faster, so
10081 that's what we use unless the branch won't reach. */
10082
10083 #define ALWAYS_USE_FAKE_DEP 0
10084 #define ALWAYS_EMIT_R2SAVE 0
10085
10086 #define PPC_LO(v) ((v) & 0xffff)
10087 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10088 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10089
10090 static inline unsigned int
10091 plt_stub_size (struct ppc_link_hash_table *htab,
10092 struct ppc_stub_hash_entry *stub_entry,
10093 bfd_vma off)
10094 {
10095 unsigned size = 12;
10096
10097 if (ALWAYS_EMIT_R2SAVE
10098 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10099 size += 4;
10100 if (PPC_HA (off) != 0)
10101 size += 4;
10102 if (htab->opd_abi)
10103 {
10104 size += 4;
10105 if (htab->plt_static_chain)
10106 size += 4;
10107 if (htab->plt_thread_safe)
10108 size += 8;
10109 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
10110 size += 4;
10111 }
10112 if (stub_entry->h != NULL
10113 && (stub_entry->h == htab->tls_get_addr_fd
10114 || stub_entry->h == htab->tls_get_addr)
10115 && !htab->no_tls_get_addr_opt)
10116 size += 13 * 4;
10117 return size;
10118 }
10119
10120 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10121 then return the padding needed to do so. */
10122 static inline unsigned int
10123 plt_stub_pad (struct ppc_link_hash_table *htab,
10124 struct ppc_stub_hash_entry *stub_entry,
10125 bfd_vma plt_off)
10126 {
10127 int stub_align = 1 << htab->plt_stub_align;
10128 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10129 bfd_vma stub_off = stub_entry->stub_sec->size;
10130
10131 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10132 > (stub_size & -stub_align))
10133 return stub_align - (stub_off & (stub_align - 1));
10134 return 0;
10135 }
10136
10137 /* Build a .plt call stub. */
10138
10139 static inline bfd_byte *
10140 build_plt_stub (struct ppc_link_hash_table *htab,
10141 struct ppc_stub_hash_entry *stub_entry,
10142 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10143 {
10144 bfd *obfd = htab->stub_bfd;
10145 bfd_boolean plt_load_toc = htab->opd_abi;
10146 bfd_boolean plt_static_chain = htab->plt_static_chain;
10147 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
10148 bfd_boolean use_fake_dep = plt_thread_safe;
10149 bfd_vma cmp_branch_off = 0;
10150
10151 if (!ALWAYS_USE_FAKE_DEP
10152 && plt_load_toc
10153 && plt_thread_safe
10154 && !(stub_entry->h != NULL
10155 && (stub_entry->h == htab->tls_get_addr_fd
10156 || stub_entry->h == htab->tls_get_addr)
10157 && !htab->no_tls_get_addr_opt))
10158 {
10159 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10160 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10161 / PLT_ENTRY_SIZE (htab));
10162 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10163 bfd_vma to, from;
10164
10165 if (pltindex > 32768)
10166 glinkoff += (pltindex - 32768) * 4;
10167 to = (glinkoff
10168 + htab->glink->output_offset
10169 + htab->glink->output_section->vma);
10170 from = (p - stub_entry->stub_sec->contents
10171 + 4 * (ALWAYS_EMIT_R2SAVE
10172 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10173 + 4 * (PPC_HA (offset) != 0)
10174 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10175 != PPC_HA (offset))
10176 + 4 * (plt_static_chain != 0)
10177 + 20
10178 + stub_entry->stub_sec->output_offset
10179 + stub_entry->stub_sec->output_section->vma);
10180 cmp_branch_off = to - from;
10181 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10182 }
10183
10184 if (PPC_HA (offset) != 0)
10185 {
10186 if (r != NULL)
10187 {
10188 if (ALWAYS_EMIT_R2SAVE
10189 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10190 r[0].r_offset += 4;
10191 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10192 r[1].r_offset = r[0].r_offset + 4;
10193 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10194 r[1].r_addend = r[0].r_addend;
10195 if (plt_load_toc)
10196 {
10197 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10198 {
10199 r[2].r_offset = r[1].r_offset + 4;
10200 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10201 r[2].r_addend = r[0].r_addend;
10202 }
10203 else
10204 {
10205 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10206 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10207 r[2].r_addend = r[0].r_addend + 8;
10208 if (plt_static_chain)
10209 {
10210 r[3].r_offset = r[2].r_offset + 4;
10211 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10212 r[3].r_addend = r[0].r_addend + 16;
10213 }
10214 }
10215 }
10216 }
10217 if (ALWAYS_EMIT_R2SAVE
10218 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10219 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10220 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10221 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10222 if (plt_load_toc
10223 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10224 {
10225 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10226 offset = 0;
10227 }
10228 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10229 if (plt_load_toc)
10230 {
10231 if (use_fake_dep)
10232 {
10233 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10234 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10235 }
10236 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10237 if (plt_static_chain)
10238 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10239 }
10240 }
10241 else
10242 {
10243 if (r != NULL)
10244 {
10245 if (ALWAYS_EMIT_R2SAVE
10246 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10247 r[0].r_offset += 4;
10248 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10249 if (plt_load_toc)
10250 {
10251 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10252 {
10253 r[1].r_offset = r[0].r_offset + 4;
10254 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10255 r[1].r_addend = r[0].r_addend;
10256 }
10257 else
10258 {
10259 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10260 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10261 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10262 if (plt_static_chain)
10263 {
10264 r[2].r_offset = r[1].r_offset + 4;
10265 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10266 r[2].r_addend = r[0].r_addend + 8;
10267 }
10268 }
10269 }
10270 }
10271 if (ALWAYS_EMIT_R2SAVE
10272 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10273 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10274 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10275 if (plt_load_toc
10276 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10277 {
10278 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10279 offset = 0;
10280 }
10281 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10282 if (plt_load_toc)
10283 {
10284 if (use_fake_dep)
10285 {
10286 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10287 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10288 }
10289 if (plt_static_chain)
10290 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10291 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10292 }
10293 }
10294 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10295 {
10296 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10297 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10298 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10299 }
10300 else
10301 bfd_put_32 (obfd, BCTR, p), p += 4;
10302 return p;
10303 }
10304
10305 /* Build a special .plt call stub for __tls_get_addr. */
10306
10307 #define LD_R11_0R3 0xe9630000
10308 #define LD_R12_0R3 0xe9830000
10309 #define MR_R0_R3 0x7c601b78
10310 #define CMPDI_R11_0 0x2c2b0000
10311 #define ADD_R3_R12_R13 0x7c6c6a14
10312 #define BEQLR 0x4d820020
10313 #define MR_R3_R0 0x7c030378
10314 #define STD_R11_0R1 0xf9610000
10315 #define BCTRL 0x4e800421
10316 #define LD_R11_0R1 0xe9610000
10317 #define MTLR_R11 0x7d6803a6
10318
10319 static inline bfd_byte *
10320 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10321 struct ppc_stub_hash_entry *stub_entry,
10322 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10323 {
10324 bfd *obfd = htab->stub_bfd;
10325
10326 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10327 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10328 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10329 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10330 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10331 bfd_put_32 (obfd, BEQLR, p), p += 4;
10332 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10333 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10334 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10335
10336 if (r != NULL)
10337 r[0].r_offset += 9 * 4;
10338 p = build_plt_stub (htab, stub_entry, p, offset, r);
10339 bfd_put_32 (obfd, BCTRL, p - 4);
10340
10341 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10342 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10343 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10344 bfd_put_32 (obfd, BLR, p), p += 4;
10345
10346 return p;
10347 }
10348
10349 static Elf_Internal_Rela *
10350 get_relocs (asection *sec, int count)
10351 {
10352 Elf_Internal_Rela *relocs;
10353 struct bfd_elf_section_data *elfsec_data;
10354
10355 elfsec_data = elf_section_data (sec);
10356 relocs = elfsec_data->relocs;
10357 if (relocs == NULL)
10358 {
10359 bfd_size_type relsize;
10360 relsize = sec->reloc_count * sizeof (*relocs);
10361 relocs = bfd_alloc (sec->owner, relsize);
10362 if (relocs == NULL)
10363 return NULL;
10364 elfsec_data->relocs = relocs;
10365 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10366 sizeof (Elf_Internal_Shdr));
10367 if (elfsec_data->rela.hdr == NULL)
10368 return NULL;
10369 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10370 * sizeof (Elf64_External_Rela));
10371 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10372 sec->reloc_count = 0;
10373 }
10374 relocs += sec->reloc_count;
10375 sec->reloc_count += count;
10376 return relocs;
10377 }
10378
10379 static bfd_vma
10380 get_r2off (struct bfd_link_info *info,
10381 struct ppc_stub_hash_entry *stub_entry)
10382 {
10383 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10384 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10385
10386 if (r2off == 0)
10387 {
10388 /* Support linking -R objects. Get the toc pointer from the
10389 opd entry. */
10390 char buf[8];
10391 if (!htab->opd_abi)
10392 return r2off;
10393 asection *opd = stub_entry->h->elf.root.u.def.section;
10394 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10395
10396 if (strcmp (opd->name, ".opd") != 0
10397 || opd->reloc_count != 0)
10398 {
10399 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10400 stub_entry->h->elf.root.root.string);
10401 bfd_set_error (bfd_error_bad_value);
10402 return 0;
10403 }
10404 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10405 return 0;
10406 r2off = bfd_get_64 (opd->owner, buf);
10407 r2off -= elf_gp (info->output_bfd);
10408 }
10409 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10410 return r2off;
10411 }
10412
10413 static bfd_boolean
10414 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10415 {
10416 struct ppc_stub_hash_entry *stub_entry;
10417 struct ppc_branch_hash_entry *br_entry;
10418 struct bfd_link_info *info;
10419 struct ppc_link_hash_table *htab;
10420 bfd_byte *loc;
10421 bfd_byte *p;
10422 bfd_vma dest, off;
10423 int size;
10424 Elf_Internal_Rela *r;
10425 asection *plt;
10426
10427 /* Massage our args to the form they really have. */
10428 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10429 info = in_arg;
10430
10431 htab = ppc_hash_table (info);
10432 if (htab == NULL)
10433 return FALSE;
10434
10435 /* Make a note of the offset within the stubs for this entry. */
10436 stub_entry->stub_offset = stub_entry->stub_sec->size;
10437 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10438
10439 htab->stub_count[stub_entry->stub_type - 1] += 1;
10440 switch (stub_entry->stub_type)
10441 {
10442 case ppc_stub_long_branch:
10443 case ppc_stub_long_branch_r2off:
10444 /* Branches are relative. This is where we are going to. */
10445 dest = (stub_entry->target_value
10446 + stub_entry->target_section->output_offset
10447 + stub_entry->target_section->output_section->vma);
10448 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10449 off = dest;
10450
10451 /* And this is where we are coming from. */
10452 off -= (stub_entry->stub_offset
10453 + stub_entry->stub_sec->output_offset
10454 + stub_entry->stub_sec->output_section->vma);
10455
10456 size = 4;
10457 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10458 {
10459 bfd_vma r2off = get_r2off (info, stub_entry);
10460
10461 if (r2off == 0)
10462 {
10463 htab->stub_error = TRUE;
10464 return FALSE;
10465 }
10466 bfd_put_32 (htab->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10467 loc += 4;
10468 size = 12;
10469 if (PPC_HA (r2off) != 0)
10470 {
10471 size = 16;
10472 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10473 loc += 4;
10474 }
10475 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10476 loc += 4;
10477 off -= size - 4;
10478 }
10479 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10480
10481 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10482 {
10483 info->callbacks->einfo
10484 (_("%P: long branch stub `%s' offset overflow\n"),
10485 stub_entry->root.string);
10486 htab->stub_error = TRUE;
10487 return FALSE;
10488 }
10489
10490 if (info->emitrelocations)
10491 {
10492 r = get_relocs (stub_entry->stub_sec, 1);
10493 if (r == NULL)
10494 return FALSE;
10495 r->r_offset = loc - stub_entry->stub_sec->contents;
10496 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10497 r->r_addend = dest;
10498 if (stub_entry->h != NULL)
10499 {
10500 struct elf_link_hash_entry **hashes;
10501 unsigned long symndx;
10502 struct ppc_link_hash_entry *h;
10503
10504 hashes = elf_sym_hashes (htab->stub_bfd);
10505 if (hashes == NULL)
10506 {
10507 bfd_size_type hsize;
10508
10509 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10510 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10511 if (hashes == NULL)
10512 return FALSE;
10513 elf_sym_hashes (htab->stub_bfd) = hashes;
10514 htab->stub_globals = 1;
10515 }
10516 symndx = htab->stub_globals++;
10517 h = stub_entry->h;
10518 hashes[symndx] = &h->elf;
10519 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10520 if (h->oh != NULL && h->oh->is_func)
10521 h = ppc_follow_link (h->oh);
10522 if (h->elf.root.u.def.section != stub_entry->target_section)
10523 /* H is an opd symbol. The addend must be zero. */
10524 r->r_addend = 0;
10525 else
10526 {
10527 off = (h->elf.root.u.def.value
10528 + h->elf.root.u.def.section->output_offset
10529 + h->elf.root.u.def.section->output_section->vma);
10530 r->r_addend -= off;
10531 }
10532 }
10533 }
10534 break;
10535
10536 case ppc_stub_plt_branch:
10537 case ppc_stub_plt_branch_r2off:
10538 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10539 stub_entry->root.string + 9,
10540 FALSE, FALSE);
10541 if (br_entry == NULL)
10542 {
10543 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10544 stub_entry->root.string);
10545 htab->stub_error = TRUE;
10546 return FALSE;
10547 }
10548
10549 dest = (stub_entry->target_value
10550 + stub_entry->target_section->output_offset
10551 + stub_entry->target_section->output_section->vma);
10552 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10553 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10554
10555 bfd_put_64 (htab->brlt->owner, dest,
10556 htab->brlt->contents + br_entry->offset);
10557
10558 if (br_entry->iter == htab->stub_iteration)
10559 {
10560 br_entry->iter = 0;
10561
10562 if (htab->relbrlt != NULL)
10563 {
10564 /* Create a reloc for the branch lookup table entry. */
10565 Elf_Internal_Rela rela;
10566 bfd_byte *rl;
10567
10568 rela.r_offset = (br_entry->offset
10569 + htab->brlt->output_offset
10570 + htab->brlt->output_section->vma);
10571 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10572 rela.r_addend = dest;
10573
10574 rl = htab->relbrlt->contents;
10575 rl += (htab->relbrlt->reloc_count++
10576 * sizeof (Elf64_External_Rela));
10577 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10578 }
10579 else if (info->emitrelocations)
10580 {
10581 r = get_relocs (htab->brlt, 1);
10582 if (r == NULL)
10583 return FALSE;
10584 /* brlt, being SEC_LINKER_CREATED does not go through the
10585 normal reloc processing. Symbols and offsets are not
10586 translated from input file to output file form, so
10587 set up the offset per the output file. */
10588 r->r_offset = (br_entry->offset
10589 + htab->brlt->output_offset
10590 + htab->brlt->output_section->vma);
10591 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10592 r->r_addend = dest;
10593 }
10594 }
10595
10596 dest = (br_entry->offset
10597 + htab->brlt->output_offset
10598 + htab->brlt->output_section->vma);
10599
10600 off = (dest
10601 - elf_gp (htab->brlt->output_section->owner)
10602 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10603
10604 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10605 {
10606 info->callbacks->einfo
10607 (_("%P: linkage table error against `%T'\n"),
10608 stub_entry->root.string);
10609 bfd_set_error (bfd_error_bad_value);
10610 htab->stub_error = TRUE;
10611 return FALSE;
10612 }
10613
10614 if (info->emitrelocations)
10615 {
10616 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10617 if (r == NULL)
10618 return FALSE;
10619 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10620 if (bfd_big_endian (info->output_bfd))
10621 r[0].r_offset += 2;
10622 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10623 r[0].r_offset += 4;
10624 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10625 r[0].r_addend = dest;
10626 if (PPC_HA (off) != 0)
10627 {
10628 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10629 r[1].r_offset = r[0].r_offset + 4;
10630 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10631 r[1].r_addend = r[0].r_addend;
10632 }
10633 }
10634
10635 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10636 {
10637 if (PPC_HA (off) != 0)
10638 {
10639 size = 16;
10640 bfd_put_32 (htab->stub_bfd, ADDIS_R11_R2 | PPC_HA (off), loc);
10641 loc += 4;
10642 bfd_put_32 (htab->stub_bfd, LD_R12_0R11 | PPC_LO (off), loc);
10643 }
10644 else
10645 {
10646 size = 12;
10647 bfd_put_32 (htab->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10648 }
10649 }
10650 else
10651 {
10652 bfd_vma r2off = get_r2off (info, stub_entry);
10653
10654 if (r2off == 0 && htab->opd_abi)
10655 {
10656 htab->stub_error = TRUE;
10657 return FALSE;
10658 }
10659
10660 bfd_put_32 (htab->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10661 loc += 4;
10662 size = 16;
10663 if (PPC_HA (off) != 0)
10664 {
10665 size += 4;
10666 bfd_put_32 (htab->stub_bfd, ADDIS_R11_R2 | PPC_HA (off), loc);
10667 loc += 4;
10668 bfd_put_32 (htab->stub_bfd, LD_R12_0R11 | PPC_LO (off), loc);
10669 }
10670 else
10671 bfd_put_32 (htab->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10672
10673 if (PPC_HA (r2off) != 0)
10674 {
10675 size += 4;
10676 loc += 4;
10677 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10678 }
10679 if (PPC_LO (r2off) != 0)
10680 {
10681 size += 4;
10682 loc += 4;
10683 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10684 }
10685 }
10686 loc += 4;
10687 bfd_put_32 (htab->stub_bfd, MTCTR_R12, loc);
10688 loc += 4;
10689 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10690 break;
10691
10692 case ppc_stub_plt_call:
10693 case ppc_stub_plt_call_r2save:
10694 if (stub_entry->h != NULL
10695 && stub_entry->h->is_func_descriptor
10696 && stub_entry->h->oh != NULL)
10697 {
10698 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10699
10700 /* If the old-ABI "dot-symbol" is undefined make it weak so
10701 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10702 FIXME: We used to define the symbol on one of the call
10703 stubs instead, which is why we test symbol section id
10704 against htab->top_id in various places. Likely all
10705 these checks could now disappear. */
10706 if (fh->elf.root.type == bfd_link_hash_undefined)
10707 fh->elf.root.type = bfd_link_hash_undefweak;
10708 /* Stop undo_symbol_twiddle changing it back to undefined. */
10709 fh->was_undefined = 0;
10710 }
10711
10712 /* Now build the stub. */
10713 dest = stub_entry->plt_ent->plt.offset & ~1;
10714 if (dest >= (bfd_vma) -2)
10715 abort ();
10716
10717 plt = htab->elf.splt;
10718 if (!htab->elf.dynamic_sections_created
10719 || stub_entry->h == NULL
10720 || stub_entry->h->elf.dynindx == -1)
10721 plt = htab->elf.iplt;
10722
10723 dest += plt->output_offset + plt->output_section->vma;
10724
10725 if (stub_entry->h == NULL
10726 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10727 {
10728 Elf_Internal_Rela rela;
10729 bfd_byte *rl;
10730
10731 rela.r_offset = dest;
10732 if (htab->opd_abi)
10733 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10734 else
10735 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10736 rela.r_addend = (stub_entry->target_value
10737 + stub_entry->target_section->output_offset
10738 + stub_entry->target_section->output_section->vma);
10739
10740 rl = (htab->elf.irelplt->contents
10741 + (htab->elf.irelplt->reloc_count++
10742 * sizeof (Elf64_External_Rela)));
10743 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10744 stub_entry->plt_ent->plt.offset |= 1;
10745 }
10746
10747 off = (dest
10748 - elf_gp (plt->output_section->owner)
10749 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10750
10751 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10752 {
10753 info->callbacks->einfo
10754 (_("%P: linkage table error against `%T'\n"),
10755 stub_entry->h != NULL
10756 ? stub_entry->h->elf.root.root.string
10757 : "<local sym>");
10758 bfd_set_error (bfd_error_bad_value);
10759 htab->stub_error = TRUE;
10760 return FALSE;
10761 }
10762
10763 if (htab->plt_stub_align != 0)
10764 {
10765 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10766
10767 stub_entry->stub_sec->size += pad;
10768 stub_entry->stub_offset = stub_entry->stub_sec->size;
10769 loc += pad;
10770 }
10771
10772 r = NULL;
10773 if (info->emitrelocations)
10774 {
10775 r = get_relocs (stub_entry->stub_sec,
10776 ((PPC_HA (off) != 0)
10777 + (htab->opd_abi
10778 ? 2 + (htab->plt_static_chain
10779 && PPC_HA (off + 16) == PPC_HA (off))
10780 : 1)));
10781 if (r == NULL)
10782 return FALSE;
10783 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10784 if (bfd_big_endian (info->output_bfd))
10785 r[0].r_offset += 2;
10786 r[0].r_addend = dest;
10787 }
10788 if (stub_entry->h != NULL
10789 && (stub_entry->h == htab->tls_get_addr_fd
10790 || stub_entry->h == htab->tls_get_addr)
10791 && !htab->no_tls_get_addr_opt)
10792 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10793 else
10794 p = build_plt_stub (htab, stub_entry, loc, off, r);
10795 size = p - loc;
10796 break;
10797
10798 default:
10799 BFD_FAIL ();
10800 return FALSE;
10801 }
10802
10803 stub_entry->stub_sec->size += size;
10804
10805 if (htab->emit_stub_syms)
10806 {
10807 struct elf_link_hash_entry *h;
10808 size_t len1, len2;
10809 char *name;
10810 const char *const stub_str[] = { "long_branch",
10811 "long_branch_r2off",
10812 "plt_branch",
10813 "plt_branch_r2off",
10814 "plt_call",
10815 "plt_call" };
10816
10817 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10818 len2 = strlen (stub_entry->root.string);
10819 name = bfd_malloc (len1 + len2 + 2);
10820 if (name == NULL)
10821 return FALSE;
10822 memcpy (name, stub_entry->root.string, 9);
10823 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10824 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10825 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10826 if (h == NULL)
10827 return FALSE;
10828 if (h->root.type == bfd_link_hash_new)
10829 {
10830 h->root.type = bfd_link_hash_defined;
10831 h->root.u.def.section = stub_entry->stub_sec;
10832 h->root.u.def.value = stub_entry->stub_offset;
10833 h->ref_regular = 1;
10834 h->def_regular = 1;
10835 h->ref_regular_nonweak = 1;
10836 h->forced_local = 1;
10837 h->non_elf = 0;
10838 }
10839 }
10840
10841 return TRUE;
10842 }
10843
10844 /* As above, but don't actually build the stub. Just bump offset so
10845 we know stub section sizes, and select plt_branch stubs where
10846 long_branch stubs won't do. */
10847
10848 static bfd_boolean
10849 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10850 {
10851 struct ppc_stub_hash_entry *stub_entry;
10852 struct bfd_link_info *info;
10853 struct ppc_link_hash_table *htab;
10854 bfd_vma off;
10855 int size;
10856
10857 /* Massage our args to the form they really have. */
10858 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10859 info = in_arg;
10860
10861 htab = ppc_hash_table (info);
10862 if (htab == NULL)
10863 return FALSE;
10864
10865 if (stub_entry->stub_type == ppc_stub_plt_call
10866 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10867 {
10868 asection *plt;
10869 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10870 if (off >= (bfd_vma) -2)
10871 abort ();
10872 plt = htab->elf.splt;
10873 if (!htab->elf.dynamic_sections_created
10874 || stub_entry->h == NULL
10875 || stub_entry->h->elf.dynindx == -1)
10876 plt = htab->elf.iplt;
10877 off += (plt->output_offset
10878 + plt->output_section->vma
10879 - elf_gp (plt->output_section->owner)
10880 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10881
10882 size = plt_stub_size (htab, stub_entry, off);
10883 if (htab->plt_stub_align)
10884 size += plt_stub_pad (htab, stub_entry, off);
10885 if (info->emitrelocations)
10886 {
10887 stub_entry->stub_sec->reloc_count
10888 += ((PPC_HA (off) != 0)
10889 + (htab->opd_abi
10890 ? 2 + (htab->plt_static_chain
10891 && PPC_HA (off + 16) == PPC_HA (off))
10892 : 1));
10893 stub_entry->stub_sec->flags |= SEC_RELOC;
10894 }
10895 }
10896 else
10897 {
10898 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10899 variants. */
10900 bfd_vma r2off = 0;
10901 bfd_vma local_off = 0;
10902
10903 off = (stub_entry->target_value
10904 + stub_entry->target_section->output_offset
10905 + stub_entry->target_section->output_section->vma);
10906 off -= (stub_entry->stub_sec->size
10907 + stub_entry->stub_sec->output_offset
10908 + stub_entry->stub_sec->output_section->vma);
10909
10910 /* Reset the stub type from the plt variant in case we now
10911 can reach with a shorter stub. */
10912 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10913 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10914
10915 size = 4;
10916 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10917 {
10918 r2off = get_r2off (info, stub_entry);
10919 if (r2off == 0 && htab->opd_abi)
10920 {
10921 htab->stub_error = TRUE;
10922 return FALSE;
10923 }
10924 size = 12;
10925 if (PPC_HA (r2off) != 0)
10926 size = 16;
10927 off -= size - 4;
10928 }
10929
10930 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10931
10932 /* If the branch offset if too big, use a ppc_stub_plt_branch.
10933 Do the same for -R objects without function descriptors. */
10934 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
10935 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
10936 && r2off == 0))
10937 {
10938 struct ppc_branch_hash_entry *br_entry;
10939
10940 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10941 stub_entry->root.string + 9,
10942 TRUE, FALSE);
10943 if (br_entry == NULL)
10944 {
10945 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10946 stub_entry->root.string);
10947 htab->stub_error = TRUE;
10948 return FALSE;
10949 }
10950
10951 if (br_entry->iter != htab->stub_iteration)
10952 {
10953 br_entry->iter = htab->stub_iteration;
10954 br_entry->offset = htab->brlt->size;
10955 htab->brlt->size += 8;
10956
10957 if (htab->relbrlt != NULL)
10958 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10959 else if (info->emitrelocations)
10960 {
10961 htab->brlt->reloc_count += 1;
10962 htab->brlt->flags |= SEC_RELOC;
10963 }
10964 }
10965
10966 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10967 off = (br_entry->offset
10968 + htab->brlt->output_offset
10969 + htab->brlt->output_section->vma
10970 - elf_gp (htab->brlt->output_section->owner)
10971 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10972
10973 if (info->emitrelocations)
10974 {
10975 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10976 stub_entry->stub_sec->flags |= SEC_RELOC;
10977 }
10978
10979 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10980 {
10981 size = 12;
10982 if (PPC_HA (off) != 0)
10983 size = 16;
10984 }
10985 else
10986 {
10987 size = 16;
10988 if (PPC_HA (off) != 0)
10989 size += 4;
10990
10991 if (PPC_HA (r2off) != 0)
10992 size += 4;
10993 if (PPC_LO (r2off) != 0)
10994 size += 4;
10995 }
10996 }
10997 else if (info->emitrelocations)
10998 {
10999 stub_entry->stub_sec->reloc_count += 1;
11000 stub_entry->stub_sec->flags |= SEC_RELOC;
11001 }
11002 }
11003
11004 stub_entry->stub_sec->size += size;
11005 return TRUE;
11006 }
11007
11008 /* Set up various things so that we can make a list of input sections
11009 for each output section included in the link. Returns -1 on error,
11010 0 when no stubs will be needed, and 1 on success. */
11011
11012 int
11013 ppc64_elf_setup_section_lists
11014 (struct bfd_link_info *info,
11015 asection *(*add_stub_section) (const char *, asection *),
11016 void (*layout_sections_again) (void))
11017 {
11018 bfd *input_bfd;
11019 int top_id, top_index, id;
11020 asection *section;
11021 asection **input_list;
11022 bfd_size_type amt;
11023 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11024
11025 if (htab == NULL)
11026 return -1;
11027 /* Stash our params away. */
11028 htab->add_stub_section = add_stub_section;
11029 htab->layout_sections_again = layout_sections_again;
11030
11031 /* Find the top input section id. */
11032 for (input_bfd = info->input_bfds, top_id = 3;
11033 input_bfd != NULL;
11034 input_bfd = input_bfd->link_next)
11035 {
11036 for (section = input_bfd->sections;
11037 section != NULL;
11038 section = section->next)
11039 {
11040 if (top_id < section->id)
11041 top_id = section->id;
11042 }
11043 }
11044
11045 htab->top_id = top_id;
11046 amt = sizeof (struct map_stub) * (top_id + 1);
11047 htab->stub_group = bfd_zmalloc (amt);
11048 if (htab->stub_group == NULL)
11049 return -1;
11050
11051 /* Set toc_off for com, und, abs and ind sections. */
11052 for (id = 0; id < 3; id++)
11053 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11054
11055 /* We can't use output_bfd->section_count here to find the top output
11056 section index as some sections may have been removed, and
11057 strip_excluded_output_sections doesn't renumber the indices. */
11058 for (section = info->output_bfd->sections, top_index = 0;
11059 section != NULL;
11060 section = section->next)
11061 {
11062 if (top_index < section->index)
11063 top_index = section->index;
11064 }
11065
11066 htab->top_index = top_index;
11067 amt = sizeof (asection *) * (top_index + 1);
11068 input_list = bfd_zmalloc (amt);
11069 htab->input_list = input_list;
11070 if (input_list == NULL)
11071 return -1;
11072
11073 return 1;
11074 }
11075
11076 /* Set up for first pass at multitoc partitioning. */
11077
11078 void
11079 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11080 {
11081 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11082
11083 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11084 htab->toc_bfd = NULL;
11085 htab->toc_first_sec = NULL;
11086 }
11087
11088 /* The linker repeatedly calls this function for each TOC input section
11089 and linker generated GOT section. Group input bfds such that the toc
11090 within a group is less than 64k in size. */
11091
11092 bfd_boolean
11093 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11094 {
11095 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11096 bfd_vma addr, off, limit;
11097
11098 if (htab == NULL)
11099 return FALSE;
11100
11101 if (!htab->second_toc_pass)
11102 {
11103 /* Keep track of the first .toc or .got section for this input bfd. */
11104 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11105
11106 if (new_bfd)
11107 {
11108 htab->toc_bfd = isec->owner;
11109 htab->toc_first_sec = isec;
11110 }
11111
11112 addr = isec->output_offset + isec->output_section->vma;
11113 off = addr - htab->toc_curr;
11114 limit = 0x80008000;
11115 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11116 limit = 0x10000;
11117 if (off + isec->size > limit)
11118 {
11119 addr = (htab->toc_first_sec->output_offset
11120 + htab->toc_first_sec->output_section->vma);
11121 htab->toc_curr = addr;
11122 }
11123
11124 /* toc_curr is the base address of this toc group. Set elf_gp
11125 for the input section to be the offset relative to the
11126 output toc base plus 0x8000. Making the input elf_gp an
11127 offset allows us to move the toc as a whole without
11128 recalculating input elf_gp. */
11129 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11130 off += TOC_BASE_OFF;
11131
11132 /* Die if someone uses a linker script that doesn't keep input
11133 file .toc and .got together. */
11134 if (new_bfd
11135 && elf_gp (isec->owner) != 0
11136 && elf_gp (isec->owner) != off)
11137 return FALSE;
11138
11139 elf_gp (isec->owner) = off;
11140 return TRUE;
11141 }
11142
11143 /* During the second pass toc_first_sec points to the start of
11144 a toc group, and toc_curr is used to track the old elf_gp.
11145 We use toc_bfd to ensure we only look at each bfd once. */
11146 if (htab->toc_bfd == isec->owner)
11147 return TRUE;
11148 htab->toc_bfd = isec->owner;
11149
11150 if (htab->toc_first_sec == NULL
11151 || htab->toc_curr != elf_gp (isec->owner))
11152 {
11153 htab->toc_curr = elf_gp (isec->owner);
11154 htab->toc_first_sec = isec;
11155 }
11156 addr = (htab->toc_first_sec->output_offset
11157 + htab->toc_first_sec->output_section->vma);
11158 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11159 elf_gp (isec->owner) = off;
11160
11161 return TRUE;
11162 }
11163
11164 /* Called via elf_link_hash_traverse to merge GOT entries for global
11165 symbol H. */
11166
11167 static bfd_boolean
11168 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11169 {
11170 if (h->root.type == bfd_link_hash_indirect)
11171 return TRUE;
11172
11173 merge_got_entries (&h->got.glist);
11174
11175 return TRUE;
11176 }
11177
11178 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11179 symbol H. */
11180
11181 static bfd_boolean
11182 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11183 {
11184 struct got_entry *gent;
11185
11186 if (h->root.type == bfd_link_hash_indirect)
11187 return TRUE;
11188
11189 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11190 if (!gent->is_indirect)
11191 allocate_got (h, (struct bfd_link_info *) inf, gent);
11192 return TRUE;
11193 }
11194
11195 /* Called on the first multitoc pass after the last call to
11196 ppc64_elf_next_toc_section. This function removes duplicate GOT
11197 entries. */
11198
11199 bfd_boolean
11200 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11201 {
11202 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11203 struct bfd *ibfd, *ibfd2;
11204 bfd_boolean done_something;
11205
11206 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11207
11208 if (!htab->do_multi_toc)
11209 return FALSE;
11210
11211 /* Merge global sym got entries within a toc group. */
11212 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11213
11214 /* And tlsld_got. */
11215 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11216 {
11217 struct got_entry *ent, *ent2;
11218
11219 if (!is_ppc64_elf (ibfd))
11220 continue;
11221
11222 ent = ppc64_tlsld_got (ibfd);
11223 if (!ent->is_indirect
11224 && ent->got.offset != (bfd_vma) -1)
11225 {
11226 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
11227 {
11228 if (!is_ppc64_elf (ibfd2))
11229 continue;
11230
11231 ent2 = ppc64_tlsld_got (ibfd2);
11232 if (!ent2->is_indirect
11233 && ent2->got.offset != (bfd_vma) -1
11234 && elf_gp (ibfd2) == elf_gp (ibfd))
11235 {
11236 ent2->is_indirect = TRUE;
11237 ent2->got.ent = ent;
11238 }
11239 }
11240 }
11241 }
11242
11243 /* Zap sizes of got sections. */
11244 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11245 htab->elf.irelplt->size -= htab->got_reli_size;
11246 htab->got_reli_size = 0;
11247
11248 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11249 {
11250 asection *got, *relgot;
11251
11252 if (!is_ppc64_elf (ibfd))
11253 continue;
11254
11255 got = ppc64_elf_tdata (ibfd)->got;
11256 if (got != NULL)
11257 {
11258 got->rawsize = got->size;
11259 got->size = 0;
11260 relgot = ppc64_elf_tdata (ibfd)->relgot;
11261 relgot->rawsize = relgot->size;
11262 relgot->size = 0;
11263 }
11264 }
11265
11266 /* Now reallocate the got, local syms first. We don't need to
11267 allocate section contents again since we never increase size. */
11268 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11269 {
11270 struct got_entry **lgot_ents;
11271 struct got_entry **end_lgot_ents;
11272 struct plt_entry **local_plt;
11273 struct plt_entry **end_local_plt;
11274 unsigned char *lgot_masks;
11275 bfd_size_type locsymcount;
11276 Elf_Internal_Shdr *symtab_hdr;
11277 asection *s;
11278
11279 if (!is_ppc64_elf (ibfd))
11280 continue;
11281
11282 lgot_ents = elf_local_got_ents (ibfd);
11283 if (!lgot_ents)
11284 continue;
11285
11286 symtab_hdr = &elf_symtab_hdr (ibfd);
11287 locsymcount = symtab_hdr->sh_info;
11288 end_lgot_ents = lgot_ents + locsymcount;
11289 local_plt = (struct plt_entry **) end_lgot_ents;
11290 end_local_plt = local_plt + locsymcount;
11291 lgot_masks = (unsigned char *) end_local_plt;
11292 s = ppc64_elf_tdata (ibfd)->got;
11293 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11294 {
11295 struct got_entry *ent;
11296
11297 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11298 {
11299 unsigned int ent_size = 8;
11300 unsigned int rel_size = sizeof (Elf64_External_Rela);
11301
11302 ent->got.offset = s->size;
11303 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11304 {
11305 ent_size *= 2;
11306 rel_size *= 2;
11307 }
11308 s->size += ent_size;
11309 if ((*lgot_masks & PLT_IFUNC) != 0)
11310 {
11311 htab->elf.irelplt->size += rel_size;
11312 htab->got_reli_size += rel_size;
11313 }
11314 else if (info->shared)
11315 {
11316 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11317 srel->size += rel_size;
11318 }
11319 }
11320 }
11321 }
11322
11323 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11324
11325 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11326 {
11327 struct got_entry *ent;
11328
11329 if (!is_ppc64_elf (ibfd))
11330 continue;
11331
11332 ent = ppc64_tlsld_got (ibfd);
11333 if (!ent->is_indirect
11334 && ent->got.offset != (bfd_vma) -1)
11335 {
11336 asection *s = ppc64_elf_tdata (ibfd)->got;
11337 ent->got.offset = s->size;
11338 s->size += 16;
11339 if (info->shared)
11340 {
11341 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11342 srel->size += sizeof (Elf64_External_Rela);
11343 }
11344 }
11345 }
11346
11347 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11348 if (!done_something)
11349 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11350 {
11351 asection *got;
11352
11353 if (!is_ppc64_elf (ibfd))
11354 continue;
11355
11356 got = ppc64_elf_tdata (ibfd)->got;
11357 if (got != NULL)
11358 {
11359 done_something = got->rawsize != got->size;
11360 if (done_something)
11361 break;
11362 }
11363 }
11364
11365 if (done_something)
11366 (*htab->layout_sections_again) ();
11367
11368 /* Set up for second pass over toc sections to recalculate elf_gp
11369 on input sections. */
11370 htab->toc_bfd = NULL;
11371 htab->toc_first_sec = NULL;
11372 htab->second_toc_pass = TRUE;
11373 return done_something;
11374 }
11375
11376 /* Called after second pass of multitoc partitioning. */
11377
11378 void
11379 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11380 {
11381 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11382
11383 /* After the second pass, toc_curr tracks the TOC offset used
11384 for code sections below in ppc64_elf_next_input_section. */
11385 htab->toc_curr = TOC_BASE_OFF;
11386 }
11387
11388 /* No toc references were found in ISEC. If the code in ISEC makes no
11389 calls, then there's no need to use toc adjusting stubs when branching
11390 into ISEC. Actually, indirect calls from ISEC are OK as they will
11391 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11392 needed, and 2 if a cyclical call-graph was found but no other reason
11393 for a stub was detected. If called from the top level, a return of
11394 2 means the same as a return of 0. */
11395
11396 static int
11397 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11398 {
11399 int ret;
11400
11401 /* Mark this section as checked. */
11402 isec->call_check_done = 1;
11403
11404 /* We know none of our code bearing sections will need toc stubs. */
11405 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11406 return 0;
11407
11408 if (isec->size == 0)
11409 return 0;
11410
11411 if (isec->output_section == NULL)
11412 return 0;
11413
11414 ret = 0;
11415 if (isec->reloc_count != 0)
11416 {
11417 Elf_Internal_Rela *relstart, *rel;
11418 Elf_Internal_Sym *local_syms;
11419 struct ppc_link_hash_table *htab;
11420
11421 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11422 info->keep_memory);
11423 if (relstart == NULL)
11424 return -1;
11425
11426 /* Look for branches to outside of this section. */
11427 local_syms = NULL;
11428 htab = ppc_hash_table (info);
11429 if (htab == NULL)
11430 return -1;
11431
11432 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11433 {
11434 enum elf_ppc64_reloc_type r_type;
11435 unsigned long r_symndx;
11436 struct elf_link_hash_entry *h;
11437 struct ppc_link_hash_entry *eh;
11438 Elf_Internal_Sym *sym;
11439 asection *sym_sec;
11440 struct _opd_sec_data *opd;
11441 bfd_vma sym_value;
11442 bfd_vma dest;
11443
11444 r_type = ELF64_R_TYPE (rel->r_info);
11445 if (r_type != R_PPC64_REL24
11446 && r_type != R_PPC64_REL14
11447 && r_type != R_PPC64_REL14_BRTAKEN
11448 && r_type != R_PPC64_REL14_BRNTAKEN)
11449 continue;
11450
11451 r_symndx = ELF64_R_SYM (rel->r_info);
11452 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11453 isec->owner))
11454 {
11455 ret = -1;
11456 break;
11457 }
11458
11459 /* Calls to dynamic lib functions go through a plt call stub
11460 that uses r2. */
11461 eh = (struct ppc_link_hash_entry *) h;
11462 if (eh != NULL
11463 && (eh->elf.plt.plist != NULL
11464 || (eh->oh != NULL
11465 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11466 {
11467 ret = 1;
11468 break;
11469 }
11470
11471 if (sym_sec == NULL)
11472 /* Ignore other undefined symbols. */
11473 continue;
11474
11475 /* Assume branches to other sections not included in the
11476 link need stubs too, to cover -R and absolute syms. */
11477 if (sym_sec->output_section == NULL)
11478 {
11479 ret = 1;
11480 break;
11481 }
11482
11483 if (h == NULL)
11484 sym_value = sym->st_value;
11485 else
11486 {
11487 if (h->root.type != bfd_link_hash_defined
11488 && h->root.type != bfd_link_hash_defweak)
11489 abort ();
11490 sym_value = h->root.u.def.value;
11491 }
11492 sym_value += rel->r_addend;
11493
11494 /* If this branch reloc uses an opd sym, find the code section. */
11495 opd = get_opd_info (sym_sec);
11496 if (opd != NULL)
11497 {
11498 if (h == NULL && opd->adjust != NULL)
11499 {
11500 long adjust;
11501
11502 adjust = opd->adjust[sym->st_value / 8];
11503 if (adjust == -1)
11504 /* Assume deleted functions won't ever be called. */
11505 continue;
11506 sym_value += adjust;
11507 }
11508
11509 dest = opd_entry_value (sym_sec, sym_value,
11510 &sym_sec, NULL, FALSE);
11511 if (dest == (bfd_vma) -1)
11512 continue;
11513 }
11514 else
11515 dest = (sym_value
11516 + sym_sec->output_offset
11517 + sym_sec->output_section->vma);
11518
11519 /* Ignore branch to self. */
11520 if (sym_sec == isec)
11521 continue;
11522
11523 /* If the called function uses the toc, we need a stub. */
11524 if (sym_sec->has_toc_reloc
11525 || sym_sec->makes_toc_func_call)
11526 {
11527 ret = 1;
11528 break;
11529 }
11530
11531 /* Assume any branch that needs a long branch stub might in fact
11532 need a plt_branch stub. A plt_branch stub uses r2. */
11533 else if (dest - (isec->output_offset
11534 + isec->output_section->vma
11535 + rel->r_offset) + (1 << 25)
11536 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11537 ? h->other
11538 : sym->st_other))
11539 {
11540 ret = 1;
11541 break;
11542 }
11543
11544 /* If calling back to a section in the process of being
11545 tested, we can't say for sure that no toc adjusting stubs
11546 are needed, so don't return zero. */
11547 else if (sym_sec->call_check_in_progress)
11548 ret = 2;
11549
11550 /* Branches to another section that itself doesn't have any TOC
11551 references are OK. Recursively call ourselves to check. */
11552 else if (!sym_sec->call_check_done)
11553 {
11554 int recur;
11555
11556 /* Mark current section as indeterminate, so that other
11557 sections that call back to current won't be marked as
11558 known. */
11559 isec->call_check_in_progress = 1;
11560 recur = toc_adjusting_stub_needed (info, sym_sec);
11561 isec->call_check_in_progress = 0;
11562
11563 if (recur != 0)
11564 {
11565 ret = recur;
11566 if (recur != 2)
11567 break;
11568 }
11569 }
11570 }
11571
11572 if (local_syms != NULL
11573 && (elf_symtab_hdr (isec->owner).contents
11574 != (unsigned char *) local_syms))
11575 free (local_syms);
11576 if (elf_section_data (isec)->relocs != relstart)
11577 free (relstart);
11578 }
11579
11580 if ((ret & 1) == 0
11581 && isec->map_head.s != NULL
11582 && (strcmp (isec->output_section->name, ".init") == 0
11583 || strcmp (isec->output_section->name, ".fini") == 0))
11584 {
11585 if (isec->map_head.s->has_toc_reloc
11586 || isec->map_head.s->makes_toc_func_call)
11587 ret = 1;
11588 else if (!isec->map_head.s->call_check_done)
11589 {
11590 int recur;
11591 isec->call_check_in_progress = 1;
11592 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11593 isec->call_check_in_progress = 0;
11594 if (recur != 0)
11595 ret = recur;
11596 }
11597 }
11598
11599 if (ret == 1)
11600 isec->makes_toc_func_call = 1;
11601
11602 return ret;
11603 }
11604
11605 /* The linker repeatedly calls this function for each input section,
11606 in the order that input sections are linked into output sections.
11607 Build lists of input sections to determine groupings between which
11608 we may insert linker stubs. */
11609
11610 bfd_boolean
11611 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11612 {
11613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11614
11615 if (htab == NULL)
11616 return FALSE;
11617
11618 if ((isec->output_section->flags & SEC_CODE) != 0
11619 && isec->output_section->index <= htab->top_index)
11620 {
11621 asection **list = htab->input_list + isec->output_section->index;
11622 /* Steal the link_sec pointer for our list. */
11623 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11624 /* This happens to make the list in reverse order,
11625 which is what we want. */
11626 PREV_SEC (isec) = *list;
11627 *list = isec;
11628 }
11629
11630 if (htab->multi_toc_needed)
11631 {
11632 /* Analyse sections that aren't already flagged as needing a
11633 valid toc pointer. Exclude .fixup for the linux kernel.
11634 .fixup contains branches, but only back to the function that
11635 hit an exception. */
11636 if (!(isec->has_toc_reloc
11637 || (isec->flags & SEC_CODE) == 0
11638 || strcmp (isec->name, ".fixup") == 0
11639 || isec->call_check_done))
11640 {
11641 if (toc_adjusting_stub_needed (info, isec) < 0)
11642 return FALSE;
11643 }
11644 /* Make all sections use the TOC assigned for this object file.
11645 This will be wrong for pasted sections; We fix that in
11646 check_pasted_section(). */
11647 if (elf_gp (isec->owner) != 0)
11648 htab->toc_curr = elf_gp (isec->owner);
11649 }
11650
11651 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11652 return TRUE;
11653 }
11654
11655 /* Check that all .init and .fini sections use the same toc, if they
11656 have toc relocs. */
11657
11658 static bfd_boolean
11659 check_pasted_section (struct bfd_link_info *info, const char *name)
11660 {
11661 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11662
11663 if (o != NULL)
11664 {
11665 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11666 bfd_vma toc_off = 0;
11667 asection *i;
11668
11669 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11670 if (i->has_toc_reloc)
11671 {
11672 if (toc_off == 0)
11673 toc_off = htab->stub_group[i->id].toc_off;
11674 else if (toc_off != htab->stub_group[i->id].toc_off)
11675 return FALSE;
11676 }
11677
11678 if (toc_off == 0)
11679 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11680 if (i->makes_toc_func_call)
11681 {
11682 toc_off = htab->stub_group[i->id].toc_off;
11683 break;
11684 }
11685
11686 /* Make sure the whole pasted function uses the same toc offset. */
11687 if (toc_off != 0)
11688 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11689 htab->stub_group[i->id].toc_off = toc_off;
11690 }
11691 return TRUE;
11692 }
11693
11694 bfd_boolean
11695 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11696 {
11697 return (check_pasted_section (info, ".init")
11698 & check_pasted_section (info, ".fini"));
11699 }
11700
11701 /* See whether we can group stub sections together. Grouping stub
11702 sections may result in fewer stubs. More importantly, we need to
11703 put all .init* and .fini* stubs at the beginning of the .init or
11704 .fini output sections respectively, because glibc splits the
11705 _init and _fini functions into multiple parts. Putting a stub in
11706 the middle of a function is not a good idea. */
11707
11708 static void
11709 group_sections (struct ppc_link_hash_table *htab,
11710 bfd_size_type stub_group_size,
11711 bfd_boolean stubs_always_before_branch)
11712 {
11713 asection **list;
11714 bfd_size_type stub14_group_size;
11715 bfd_boolean suppress_size_errors;
11716
11717 suppress_size_errors = FALSE;
11718 stub14_group_size = stub_group_size;
11719 if (stub_group_size == 1)
11720 {
11721 /* Default values. */
11722 if (stubs_always_before_branch)
11723 {
11724 stub_group_size = 0x1e00000;
11725 stub14_group_size = 0x7800;
11726 }
11727 else
11728 {
11729 stub_group_size = 0x1c00000;
11730 stub14_group_size = 0x7000;
11731 }
11732 suppress_size_errors = TRUE;
11733 }
11734
11735 list = htab->input_list + htab->top_index;
11736 do
11737 {
11738 asection *tail = *list;
11739 while (tail != NULL)
11740 {
11741 asection *curr;
11742 asection *prev;
11743 bfd_size_type total;
11744 bfd_boolean big_sec;
11745 bfd_vma curr_toc;
11746
11747 curr = tail;
11748 total = tail->size;
11749 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11750 && ppc64_elf_section_data (tail)->has_14bit_branch
11751 ? stub14_group_size : stub_group_size);
11752 if (big_sec && !suppress_size_errors)
11753 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11754 tail->owner, tail);
11755 curr_toc = htab->stub_group[tail->id].toc_off;
11756
11757 while ((prev = PREV_SEC (curr)) != NULL
11758 && ((total += curr->output_offset - prev->output_offset)
11759 < (ppc64_elf_section_data (prev) != NULL
11760 && ppc64_elf_section_data (prev)->has_14bit_branch
11761 ? stub14_group_size : stub_group_size))
11762 && htab->stub_group[prev->id].toc_off == curr_toc)
11763 curr = prev;
11764
11765 /* OK, the size from the start of CURR to the end is less
11766 than stub_group_size and thus can be handled by one stub
11767 section. (or the tail section is itself larger than
11768 stub_group_size, in which case we may be toast.) We
11769 should really be keeping track of the total size of stubs
11770 added here, as stubs contribute to the final output
11771 section size. That's a little tricky, and this way will
11772 only break if stubs added make the total size more than
11773 2^25, ie. for the default stub_group_size, if stubs total
11774 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11775 do
11776 {
11777 prev = PREV_SEC (tail);
11778 /* Set up this stub group. */
11779 htab->stub_group[tail->id].link_sec = curr;
11780 }
11781 while (tail != curr && (tail = prev) != NULL);
11782
11783 /* But wait, there's more! Input sections up to stub_group_size
11784 bytes before the stub section can be handled by it too.
11785 Don't do this if we have a really large section after the
11786 stubs, as adding more stubs increases the chance that
11787 branches may not reach into the stub section. */
11788 if (!stubs_always_before_branch && !big_sec)
11789 {
11790 total = 0;
11791 while (prev != NULL
11792 && ((total += tail->output_offset - prev->output_offset)
11793 < (ppc64_elf_section_data (prev) != NULL
11794 && ppc64_elf_section_data (prev)->has_14bit_branch
11795 ? stub14_group_size : stub_group_size))
11796 && htab->stub_group[prev->id].toc_off == curr_toc)
11797 {
11798 tail = prev;
11799 prev = PREV_SEC (tail);
11800 htab->stub_group[tail->id].link_sec = curr;
11801 }
11802 }
11803 tail = prev;
11804 }
11805 }
11806 while (list-- != htab->input_list);
11807 free (htab->input_list);
11808 #undef PREV_SEC
11809 }
11810
11811 static const unsigned char glink_eh_frame_cie[] =
11812 {
11813 0, 0, 0, 16, /* length. */
11814 0, 0, 0, 0, /* id. */
11815 1, /* CIE version. */
11816 'z', 'R', 0, /* Augmentation string. */
11817 4, /* Code alignment. */
11818 0x78, /* Data alignment. */
11819 65, /* RA reg. */
11820 1, /* Augmentation size. */
11821 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11822 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11823 };
11824
11825 /* Stripping output sections is normally done before dynamic section
11826 symbols have been allocated. This function is called later, and
11827 handles cases like htab->brlt which is mapped to its own output
11828 section. */
11829
11830 static void
11831 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11832 {
11833 if (isec->size == 0
11834 && isec->output_section->size == 0
11835 && !(isec->output_section->flags & SEC_KEEP)
11836 && !bfd_section_removed_from_list (info->output_bfd,
11837 isec->output_section)
11838 && elf_section_data (isec->output_section)->dynindx == 0)
11839 {
11840 isec->output_section->flags |= SEC_EXCLUDE;
11841 bfd_section_list_remove (info->output_bfd, isec->output_section);
11842 info->output_bfd->section_count--;
11843 }
11844 }
11845
11846 /* Determine and set the size of the stub section for a final link.
11847
11848 The basic idea here is to examine all the relocations looking for
11849 PC-relative calls to a target that is unreachable with a "bl"
11850 instruction. */
11851
11852 bfd_boolean
11853 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11854 bfd_boolean plt_static_chain, int plt_thread_safe,
11855 int plt_stub_align)
11856 {
11857 bfd_size_type stub_group_size;
11858 bfd_boolean stubs_always_before_branch;
11859 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11860
11861 if (htab == NULL)
11862 return FALSE;
11863
11864 htab->plt_static_chain = plt_static_chain;
11865 htab->plt_stub_align = plt_stub_align;
11866 if (plt_thread_safe == -1 && !info->executable)
11867 plt_thread_safe = 1;
11868 if (!htab->opd_abi)
11869 plt_thread_safe = 0;
11870 else if (plt_thread_safe == -1)
11871 {
11872 static const char *const thread_starter[] =
11873 {
11874 "pthread_create",
11875 /* libstdc++ */
11876 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11877 /* librt */
11878 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11879 "mq_notify", "create_timer",
11880 /* libanl */
11881 "getaddrinfo_a",
11882 /* libgomp */
11883 "GOMP_parallel_start",
11884 "GOMP_parallel_loop_static_start",
11885 "GOMP_parallel_loop_dynamic_start",
11886 "GOMP_parallel_loop_guided_start",
11887 "GOMP_parallel_loop_runtime_start",
11888 "GOMP_parallel_sections_start",
11889 };
11890 unsigned i;
11891
11892 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11893 {
11894 struct elf_link_hash_entry *h;
11895 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11896 FALSE, FALSE, TRUE);
11897 plt_thread_safe = h != NULL && h->ref_regular;
11898 if (plt_thread_safe)
11899 break;
11900 }
11901 }
11902 htab->plt_thread_safe = plt_thread_safe;
11903 stubs_always_before_branch = group_size < 0;
11904 if (group_size < 0)
11905 stub_group_size = -group_size;
11906 else
11907 stub_group_size = group_size;
11908
11909 group_sections (htab, stub_group_size, stubs_always_before_branch);
11910
11911 while (1)
11912 {
11913 bfd *input_bfd;
11914 unsigned int bfd_indx;
11915 asection *stub_sec;
11916
11917 htab->stub_iteration += 1;
11918
11919 for (input_bfd = info->input_bfds, bfd_indx = 0;
11920 input_bfd != NULL;
11921 input_bfd = input_bfd->link_next, bfd_indx++)
11922 {
11923 Elf_Internal_Shdr *symtab_hdr;
11924 asection *section;
11925 Elf_Internal_Sym *local_syms = NULL;
11926
11927 if (!is_ppc64_elf (input_bfd))
11928 continue;
11929
11930 /* We'll need the symbol table in a second. */
11931 symtab_hdr = &elf_symtab_hdr (input_bfd);
11932 if (symtab_hdr->sh_info == 0)
11933 continue;
11934
11935 /* Walk over each section attached to the input bfd. */
11936 for (section = input_bfd->sections;
11937 section != NULL;
11938 section = section->next)
11939 {
11940 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11941
11942 /* If there aren't any relocs, then there's nothing more
11943 to do. */
11944 if ((section->flags & SEC_RELOC) == 0
11945 || (section->flags & SEC_ALLOC) == 0
11946 || (section->flags & SEC_LOAD) == 0
11947 || (section->flags & SEC_CODE) == 0
11948 || section->reloc_count == 0)
11949 continue;
11950
11951 /* If this section is a link-once section that will be
11952 discarded, then don't create any stubs. */
11953 if (section->output_section == NULL
11954 || section->output_section->owner != info->output_bfd)
11955 continue;
11956
11957 /* Get the relocs. */
11958 internal_relocs
11959 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11960 info->keep_memory);
11961 if (internal_relocs == NULL)
11962 goto error_ret_free_local;
11963
11964 /* Now examine each relocation. */
11965 irela = internal_relocs;
11966 irelaend = irela + section->reloc_count;
11967 for (; irela < irelaend; irela++)
11968 {
11969 enum elf_ppc64_reloc_type r_type;
11970 unsigned int r_indx;
11971 enum ppc_stub_type stub_type;
11972 struct ppc_stub_hash_entry *stub_entry;
11973 asection *sym_sec, *code_sec;
11974 bfd_vma sym_value, code_value;
11975 bfd_vma destination;
11976 unsigned long local_off;
11977 bfd_boolean ok_dest;
11978 struct ppc_link_hash_entry *hash;
11979 struct ppc_link_hash_entry *fdh;
11980 struct elf_link_hash_entry *h;
11981 Elf_Internal_Sym *sym;
11982 char *stub_name;
11983 const asection *id_sec;
11984 struct _opd_sec_data *opd;
11985 struct plt_entry *plt_ent;
11986
11987 r_type = ELF64_R_TYPE (irela->r_info);
11988 r_indx = ELF64_R_SYM (irela->r_info);
11989
11990 if (r_type >= R_PPC64_max)
11991 {
11992 bfd_set_error (bfd_error_bad_value);
11993 goto error_ret_free_internal;
11994 }
11995
11996 /* Only look for stubs on branch instructions. */
11997 if (r_type != R_PPC64_REL24
11998 && r_type != R_PPC64_REL14
11999 && r_type != R_PPC64_REL14_BRTAKEN
12000 && r_type != R_PPC64_REL14_BRNTAKEN)
12001 continue;
12002
12003 /* Now determine the call target, its name, value,
12004 section. */
12005 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12006 r_indx, input_bfd))
12007 goto error_ret_free_internal;
12008 hash = (struct ppc_link_hash_entry *) h;
12009
12010 ok_dest = FALSE;
12011 fdh = NULL;
12012 sym_value = 0;
12013 if (hash == NULL)
12014 {
12015 sym_value = sym->st_value;
12016 ok_dest = TRUE;
12017 }
12018 else if (hash->elf.root.type == bfd_link_hash_defined
12019 || hash->elf.root.type == bfd_link_hash_defweak)
12020 {
12021 sym_value = hash->elf.root.u.def.value;
12022 if (sym_sec->output_section != NULL)
12023 ok_dest = TRUE;
12024 }
12025 else if (hash->elf.root.type == bfd_link_hash_undefweak
12026 || hash->elf.root.type == bfd_link_hash_undefined)
12027 {
12028 /* Recognise an old ABI func code entry sym, and
12029 use the func descriptor sym instead if it is
12030 defined. */
12031 if (hash->elf.root.root.string[0] == '.'
12032 && (fdh = lookup_fdh (hash, htab)) != NULL)
12033 {
12034 if (fdh->elf.root.type == bfd_link_hash_defined
12035 || fdh->elf.root.type == bfd_link_hash_defweak)
12036 {
12037 sym_sec = fdh->elf.root.u.def.section;
12038 sym_value = fdh->elf.root.u.def.value;
12039 if (sym_sec->output_section != NULL)
12040 ok_dest = TRUE;
12041 }
12042 else
12043 fdh = NULL;
12044 }
12045 }
12046 else
12047 {
12048 bfd_set_error (bfd_error_bad_value);
12049 goto error_ret_free_internal;
12050 }
12051
12052 destination = 0;
12053 local_off = 0;
12054 if (ok_dest)
12055 {
12056 sym_value += irela->r_addend;
12057 destination = (sym_value
12058 + sym_sec->output_offset
12059 + sym_sec->output_section->vma);
12060 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12061 ? hash->elf.other
12062 : sym->st_other);
12063 }
12064
12065 code_sec = sym_sec;
12066 code_value = sym_value;
12067 opd = get_opd_info (sym_sec);
12068 if (opd != NULL)
12069 {
12070 bfd_vma dest;
12071
12072 if (hash == NULL && opd->adjust != NULL)
12073 {
12074 long adjust = opd->adjust[sym_value / 8];
12075 if (adjust == -1)
12076 continue;
12077 code_value += adjust;
12078 sym_value += adjust;
12079 }
12080 dest = opd_entry_value (sym_sec, sym_value,
12081 &code_sec, &code_value, FALSE);
12082 if (dest != (bfd_vma) -1)
12083 {
12084 destination = dest;
12085 if (fdh != NULL)
12086 {
12087 /* Fixup old ABI sym to point at code
12088 entry. */
12089 hash->elf.root.type = bfd_link_hash_defweak;
12090 hash->elf.root.u.def.section = code_sec;
12091 hash->elf.root.u.def.value = code_value;
12092 }
12093 }
12094 }
12095
12096 /* Determine what (if any) linker stub is needed. */
12097 plt_ent = NULL;
12098 stub_type = ppc_type_of_stub (section, irela, &hash,
12099 &plt_ent, destination,
12100 local_off);
12101
12102 if (stub_type != ppc_stub_plt_call)
12103 {
12104 /* Check whether we need a TOC adjusting stub.
12105 Since the linker pastes together pieces from
12106 different object files when creating the
12107 _init and _fini functions, it may be that a
12108 call to what looks like a local sym is in
12109 fact a call needing a TOC adjustment. */
12110 if (code_sec != NULL
12111 && code_sec->output_section != NULL
12112 && (htab->stub_group[code_sec->id].toc_off
12113 != htab->stub_group[section->id].toc_off)
12114 && (code_sec->has_toc_reloc
12115 || code_sec->makes_toc_func_call))
12116 stub_type = ppc_stub_long_branch_r2off;
12117 }
12118
12119 if (stub_type == ppc_stub_none)
12120 continue;
12121
12122 /* __tls_get_addr calls might be eliminated. */
12123 if (stub_type != ppc_stub_plt_call
12124 && hash != NULL
12125 && (hash == htab->tls_get_addr
12126 || hash == htab->tls_get_addr_fd)
12127 && section->has_tls_reloc
12128 && irela != internal_relocs)
12129 {
12130 /* Get tls info. */
12131 unsigned char *tls_mask;
12132
12133 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12134 irela - 1, input_bfd))
12135 goto error_ret_free_internal;
12136 if (*tls_mask != 0)
12137 continue;
12138 }
12139
12140 if (stub_type == ppc_stub_plt_call
12141 && irela + 1 < irelaend
12142 && irela[1].r_offset == irela->r_offset + 4
12143 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12144 {
12145 if (!tocsave_find (htab, INSERT,
12146 &local_syms, irela + 1, input_bfd))
12147 goto error_ret_free_internal;
12148 }
12149 else if (stub_type == ppc_stub_plt_call)
12150 stub_type = ppc_stub_plt_call_r2save;
12151
12152 /* Support for grouping stub sections. */
12153 id_sec = htab->stub_group[section->id].link_sec;
12154
12155 /* Get the name of this stub. */
12156 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12157 if (!stub_name)
12158 goto error_ret_free_internal;
12159
12160 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12161 stub_name, FALSE, FALSE);
12162 if (stub_entry != NULL)
12163 {
12164 /* The proper stub has already been created. */
12165 free (stub_name);
12166 if (stub_type == ppc_stub_plt_call_r2save)
12167 stub_entry->stub_type = stub_type;
12168 continue;
12169 }
12170
12171 stub_entry = ppc_add_stub (stub_name, section, info);
12172 if (stub_entry == NULL)
12173 {
12174 free (stub_name);
12175 error_ret_free_internal:
12176 if (elf_section_data (section)->relocs == NULL)
12177 free (internal_relocs);
12178 error_ret_free_local:
12179 if (local_syms != NULL
12180 && (symtab_hdr->contents
12181 != (unsigned char *) local_syms))
12182 free (local_syms);
12183 return FALSE;
12184 }
12185
12186 stub_entry->stub_type = stub_type;
12187 if (stub_type != ppc_stub_plt_call
12188 && stub_type != ppc_stub_plt_call_r2save)
12189 {
12190 stub_entry->target_value = code_value;
12191 stub_entry->target_section = code_sec;
12192 }
12193 else
12194 {
12195 stub_entry->target_value = sym_value;
12196 stub_entry->target_section = sym_sec;
12197 }
12198 stub_entry->h = hash;
12199 stub_entry->plt_ent = plt_ent;
12200 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12201
12202 if (stub_entry->h != NULL)
12203 htab->stub_globals += 1;
12204 }
12205
12206 /* We're done with the internal relocs, free them. */
12207 if (elf_section_data (section)->relocs != internal_relocs)
12208 free (internal_relocs);
12209 }
12210
12211 if (local_syms != NULL
12212 && symtab_hdr->contents != (unsigned char *) local_syms)
12213 {
12214 if (!info->keep_memory)
12215 free (local_syms);
12216 else
12217 symtab_hdr->contents = (unsigned char *) local_syms;
12218 }
12219 }
12220
12221 /* We may have added some stubs. Find out the new size of the
12222 stub sections. */
12223 for (stub_sec = htab->stub_bfd->sections;
12224 stub_sec != NULL;
12225 stub_sec = stub_sec->next)
12226 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12227 {
12228 stub_sec->rawsize = stub_sec->size;
12229 stub_sec->size = 0;
12230 stub_sec->reloc_count = 0;
12231 stub_sec->flags &= ~SEC_RELOC;
12232 }
12233
12234 htab->brlt->size = 0;
12235 htab->brlt->reloc_count = 0;
12236 htab->brlt->flags &= ~SEC_RELOC;
12237 if (htab->relbrlt != NULL)
12238 htab->relbrlt->size = 0;
12239
12240 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12241
12242 if (info->emitrelocations
12243 && htab->glink != NULL && htab->glink->size != 0)
12244 {
12245 htab->glink->reloc_count = 1;
12246 htab->glink->flags |= SEC_RELOC;
12247 }
12248
12249 if (htab->glink_eh_frame != NULL
12250 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12251 && htab->glink_eh_frame->output_section->size != 0)
12252 {
12253 size_t size = 0, align;
12254
12255 for (stub_sec = htab->stub_bfd->sections;
12256 stub_sec != NULL;
12257 stub_sec = stub_sec->next)
12258 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12259 size += 20;
12260 if (htab->glink != NULL && htab->glink->size != 0)
12261 size += 24;
12262 if (size != 0)
12263 size += sizeof (glink_eh_frame_cie);
12264 align = 1;
12265 align <<= htab->glink_eh_frame->output_section->alignment_power;
12266 align -= 1;
12267 size = (size + align) & ~align;
12268 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12269 htab->glink_eh_frame->size = size;
12270 }
12271
12272 if (htab->plt_stub_align != 0)
12273 for (stub_sec = htab->stub_bfd->sections;
12274 stub_sec != NULL;
12275 stub_sec = stub_sec->next)
12276 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12277 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12278 & (-1 << htab->plt_stub_align));
12279
12280 for (stub_sec = htab->stub_bfd->sections;
12281 stub_sec != NULL;
12282 stub_sec = stub_sec->next)
12283 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12284 && stub_sec->rawsize != stub_sec->size)
12285 break;
12286
12287 /* Exit from this loop when no stubs have been added, and no stubs
12288 have changed size. */
12289 if (stub_sec == NULL
12290 && (htab->glink_eh_frame == NULL
12291 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12292 break;
12293
12294 /* Ask the linker to do its stuff. */
12295 (*htab->layout_sections_again) ();
12296 }
12297
12298 maybe_strip_output (info, htab->brlt);
12299 if (htab->glink_eh_frame != NULL)
12300 maybe_strip_output (info, htab->glink_eh_frame);
12301
12302 return TRUE;
12303 }
12304
12305 /* Called after we have determined section placement. If sections
12306 move, we'll be called again. Provide a value for TOCstart. */
12307
12308 bfd_vma
12309 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12310 {
12311 asection *s;
12312 bfd_vma TOCstart;
12313
12314 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12315 order. The TOC starts where the first of these sections starts. */
12316 s = bfd_get_section_by_name (obfd, ".got");
12317 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12318 s = bfd_get_section_by_name (obfd, ".toc");
12319 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12320 s = bfd_get_section_by_name (obfd, ".tocbss");
12321 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12322 s = bfd_get_section_by_name (obfd, ".plt");
12323 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12324 {
12325 /* This may happen for
12326 o references to TOC base (SYM@toc / TOC[tc0]) without a
12327 .toc directive
12328 o bad linker script
12329 o --gc-sections and empty TOC sections
12330
12331 FIXME: Warn user? */
12332
12333 /* Look for a likely section. We probably won't even be
12334 using TOCstart. */
12335 for (s = obfd->sections; s != NULL; s = s->next)
12336 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12337 | SEC_EXCLUDE))
12338 == (SEC_ALLOC | SEC_SMALL_DATA))
12339 break;
12340 if (s == NULL)
12341 for (s = obfd->sections; s != NULL; s = s->next)
12342 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12343 == (SEC_ALLOC | SEC_SMALL_DATA))
12344 break;
12345 if (s == NULL)
12346 for (s = obfd->sections; s != NULL; s = s->next)
12347 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12348 == SEC_ALLOC)
12349 break;
12350 if (s == NULL)
12351 for (s = obfd->sections; s != NULL; s = s->next)
12352 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12353 break;
12354 }
12355
12356 TOCstart = 0;
12357 if (s != NULL)
12358 TOCstart = s->output_section->vma + s->output_offset;
12359
12360 _bfd_set_gp_value (obfd, TOCstart);
12361
12362 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
12363 {
12364 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12365
12366 if (htab != NULL
12367 && htab->elf.hgot != NULL)
12368 {
12369 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12370 htab->elf.hgot->root.u.def.section = s;
12371 }
12372 }
12373 return TOCstart;
12374 }
12375
12376 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12377 write out any global entry stubs. */
12378
12379 static bfd_boolean
12380 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12381 {
12382 struct bfd_link_info *info;
12383 struct ppc_link_hash_table *htab;
12384 struct plt_entry *pent;
12385 asection *s;
12386
12387 if (h->root.type == bfd_link_hash_indirect)
12388 return TRUE;
12389
12390 if (!h->pointer_equality_needed)
12391 return TRUE;
12392
12393 if (h->def_regular)
12394 return TRUE;
12395
12396 info = inf;
12397 htab = ppc_hash_table (info);
12398 if (htab == NULL)
12399 return FALSE;
12400
12401 s = htab->glink;
12402 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12403 if (pent->plt.offset != (bfd_vma) -1
12404 && pent->addend == 0)
12405 {
12406 bfd_byte *p;
12407 asection *plt;
12408 bfd_vma off;
12409
12410 p = s->contents + h->root.u.def.value;
12411 plt = htab->elf.splt;
12412 if (!htab->elf.dynamic_sections_created
12413 || h->dynindx == -1)
12414 plt = htab->elf.iplt;
12415 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12416 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12417
12418 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12419 {
12420 info->callbacks->einfo
12421 (_("%P: linkage table error against `%T'\n"),
12422 h->root.root.string);
12423 bfd_set_error (bfd_error_bad_value);
12424 htab->stub_error = TRUE;
12425 }
12426
12427 if (PPC_HA (off) != 0)
12428 {
12429 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12430 p += 4;
12431 }
12432 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12433 p += 4;
12434 bfd_put_32 (s->owner, MTCTR_R12, p);
12435 p += 4;
12436 bfd_put_32 (s->owner, BCTR, p);
12437 break;
12438 }
12439 return TRUE;
12440 }
12441
12442 /* Build all the stubs associated with the current output file.
12443 The stubs are kept in a hash table attached to the main linker
12444 hash table. This function is called via gldelf64ppc_finish. */
12445
12446 bfd_boolean
12447 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
12448 struct bfd_link_info *info,
12449 char **stats)
12450 {
12451 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12452 asection *stub_sec;
12453 bfd_byte *p;
12454 int stub_sec_count = 0;
12455
12456 if (htab == NULL)
12457 return FALSE;
12458
12459 htab->emit_stub_syms = emit_stub_syms;
12460
12461 /* Allocate memory to hold the linker stubs. */
12462 for (stub_sec = htab->stub_bfd->sections;
12463 stub_sec != NULL;
12464 stub_sec = stub_sec->next)
12465 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12466 && stub_sec->size != 0)
12467 {
12468 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
12469 if (stub_sec->contents == NULL)
12470 return FALSE;
12471 /* We want to check that built size is the same as calculated
12472 size. rawsize is a convenient location to use. */
12473 stub_sec->rawsize = stub_sec->size;
12474 stub_sec->size = 0;
12475 }
12476
12477 if (htab->glink != NULL && htab->glink->size != 0)
12478 {
12479 unsigned int indx;
12480 bfd_vma plt0;
12481
12482 /* Build the .glink plt call stub. */
12483 if (htab->emit_stub_syms)
12484 {
12485 struct elf_link_hash_entry *h;
12486 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12487 TRUE, FALSE, FALSE);
12488 if (h == NULL)
12489 return FALSE;
12490 if (h->root.type == bfd_link_hash_new)
12491 {
12492 h->root.type = bfd_link_hash_defined;
12493 h->root.u.def.section = htab->glink;
12494 h->root.u.def.value = 8;
12495 h->ref_regular = 1;
12496 h->def_regular = 1;
12497 h->ref_regular_nonweak = 1;
12498 h->forced_local = 1;
12499 h->non_elf = 0;
12500 }
12501 }
12502 plt0 = (htab->elf.splt->output_section->vma
12503 + htab->elf.splt->output_offset
12504 - 16);
12505 if (info->emitrelocations)
12506 {
12507 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12508 if (r == NULL)
12509 return FALSE;
12510 r->r_offset = (htab->glink->output_offset
12511 + htab->glink->output_section->vma);
12512 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12513 r->r_addend = plt0;
12514 }
12515 p = htab->glink->contents;
12516 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12517 bfd_put_64 (htab->glink->owner, plt0, p);
12518 p += 8;
12519 if (htab->opd_abi)
12520 {
12521 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12522 p += 4;
12523 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12524 p += 4;
12525 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12526 p += 4;
12527 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12528 p += 4;
12529 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12530 p += 4;
12531 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12532 p += 4;
12533 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12534 p += 4;
12535 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12536 p += 4;
12537 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12538 p += 4;
12539 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12540 p += 4;
12541 }
12542 else
12543 {
12544 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12545 p += 4;
12546 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12547 p += 4;
12548 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12549 p += 4;
12550 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12551 p += 4;
12552 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12553 p += 4;
12554 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12555 p += 4;
12556 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12557 p += 4;
12558 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12559 p += 4;
12560 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12561 p += 4;
12562 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12563 p += 4;
12564 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12565 p += 4;
12566 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12567 p += 4;
12568 }
12569 bfd_put_32 (htab->glink->owner, BCTR, p);
12570 p += 4;
12571 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12572 {
12573 bfd_put_32 (htab->glink->owner, NOP, p);
12574 p += 4;
12575 }
12576
12577 /* Build the .glink lazy link call stubs. */
12578 indx = 0;
12579 while (p < htab->glink->contents + htab->glink->rawsize)
12580 {
12581 if (htab->opd_abi)
12582 {
12583 if (indx < 0x8000)
12584 {
12585 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12586 p += 4;
12587 }
12588 else
12589 {
12590 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12591 p += 4;
12592 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12593 p);
12594 p += 4;
12595 }
12596 }
12597 bfd_put_32 (htab->glink->owner,
12598 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12599 indx++;
12600 p += 4;
12601 }
12602
12603 /* Build .glink global entry stubs. */
12604 if (htab->glink->size > htab->glink->rawsize)
12605 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12606 }
12607
12608 if (htab->brlt->size != 0)
12609 {
12610 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12611 htab->brlt->size);
12612 if (htab->brlt->contents == NULL)
12613 return FALSE;
12614 }
12615 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12616 {
12617 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12618 htab->relbrlt->size);
12619 if (htab->relbrlt->contents == NULL)
12620 return FALSE;
12621 }
12622
12623 if (htab->glink_eh_frame != NULL
12624 && htab->glink_eh_frame->size != 0)
12625 {
12626 bfd_vma val;
12627 bfd_byte *last_fde;
12628 size_t last_fde_len, size, align, pad;
12629
12630 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12631 if (p == NULL)
12632 return FALSE;
12633 htab->glink_eh_frame->contents = p;
12634 last_fde = p;
12635
12636 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12637
12638 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12639 /* CIE length (rewrite in case little-endian). */
12640 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12641 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12642 p += sizeof (glink_eh_frame_cie);
12643
12644 for (stub_sec = htab->stub_bfd->sections;
12645 stub_sec != NULL;
12646 stub_sec = stub_sec->next)
12647 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12648 {
12649 last_fde = p;
12650 last_fde_len = 16;
12651 /* FDE length. */
12652 bfd_put_32 (htab->elf.dynobj, 16, p);
12653 p += 4;
12654 /* CIE pointer. */
12655 val = p - htab->glink_eh_frame->contents;
12656 bfd_put_32 (htab->elf.dynobj, val, p);
12657 p += 4;
12658 /* Offset to stub section. */
12659 val = (stub_sec->output_section->vma
12660 + stub_sec->output_offset);
12661 val -= (htab->glink_eh_frame->output_section->vma
12662 + htab->glink_eh_frame->output_offset);
12663 val -= p - htab->glink_eh_frame->contents;
12664 if (val + 0x80000000 > 0xffffffff)
12665 {
12666 info->callbacks->einfo
12667 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12668 stub_sec->name);
12669 return FALSE;
12670 }
12671 bfd_put_32 (htab->elf.dynobj, val, p);
12672 p += 4;
12673 /* stub section size. */
12674 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12675 p += 4;
12676 /* Augmentation. */
12677 p += 1;
12678 /* Pad. */
12679 p += 3;
12680 }
12681 if (htab->glink != NULL && htab->glink->size != 0)
12682 {
12683 last_fde = p;
12684 last_fde_len = 20;
12685 /* FDE length. */
12686 bfd_put_32 (htab->elf.dynobj, 20, p);
12687 p += 4;
12688 /* CIE pointer. */
12689 val = p - htab->glink_eh_frame->contents;
12690 bfd_put_32 (htab->elf.dynobj, val, p);
12691 p += 4;
12692 /* Offset to .glink. */
12693 val = (htab->glink->output_section->vma
12694 + htab->glink->output_offset
12695 + 8);
12696 val -= (htab->glink_eh_frame->output_section->vma
12697 + htab->glink_eh_frame->output_offset);
12698 val -= p - htab->glink_eh_frame->contents;
12699 if (val + 0x80000000 > 0xffffffff)
12700 {
12701 info->callbacks->einfo
12702 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12703 htab->glink->name);
12704 return FALSE;
12705 }
12706 bfd_put_32 (htab->elf.dynobj, val, p);
12707 p += 4;
12708 /* .glink size. */
12709 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12710 p += 4;
12711 /* Augmentation. */
12712 p += 1;
12713
12714 *p++ = DW_CFA_advance_loc + 1;
12715 *p++ = DW_CFA_register;
12716 *p++ = 65;
12717 *p++ = 12;
12718 *p++ = DW_CFA_advance_loc + 4;
12719 *p++ = DW_CFA_restore_extended;
12720 *p++ = 65;
12721 }
12722 /* Subsume any padding into the last FDE if user .eh_frame
12723 sections are aligned more than glink_eh_frame. Otherwise any
12724 zero padding will be seen as a terminator. */
12725 size = p - htab->glink_eh_frame->contents;
12726 align = 1;
12727 align <<= htab->glink_eh_frame->output_section->alignment_power;
12728 align -= 1;
12729 pad = ((size + align) & ~align) - size;
12730 htab->glink_eh_frame->size = size + pad;
12731 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12732 }
12733
12734 /* Build the stubs as directed by the stub hash table. */
12735 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12736
12737 if (htab->relbrlt != NULL)
12738 htab->relbrlt->reloc_count = 0;
12739
12740 if (htab->plt_stub_align != 0)
12741 for (stub_sec = htab->stub_bfd->sections;
12742 stub_sec != NULL;
12743 stub_sec = stub_sec->next)
12744 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12745 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12746 & (-1 << htab->plt_stub_align));
12747
12748 for (stub_sec = htab->stub_bfd->sections;
12749 stub_sec != NULL;
12750 stub_sec = stub_sec->next)
12751 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12752 {
12753 stub_sec_count += 1;
12754 if (stub_sec->rawsize != stub_sec->size)
12755 break;
12756 }
12757
12758 if (stub_sec != NULL
12759 || (htab->glink_eh_frame != NULL
12760 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12761 {
12762 htab->stub_error = TRUE;
12763 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12764 }
12765
12766 if (htab->stub_error)
12767 return FALSE;
12768
12769 if (stats != NULL)
12770 {
12771 *stats = bfd_malloc (500);
12772 if (*stats == NULL)
12773 return FALSE;
12774
12775 sprintf (*stats, _("linker stubs in %u group%s\n"
12776 " branch %lu\n"
12777 " toc adjust %lu\n"
12778 " long branch %lu\n"
12779 " long toc adj %lu\n"
12780 " plt call %lu\n"
12781 " plt call toc %lu"),
12782 stub_sec_count,
12783 stub_sec_count == 1 ? "" : "s",
12784 htab->stub_count[ppc_stub_long_branch - 1],
12785 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12786 htab->stub_count[ppc_stub_plt_branch - 1],
12787 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12788 htab->stub_count[ppc_stub_plt_call - 1],
12789 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12790 }
12791 return TRUE;
12792 }
12793
12794 /* This function undoes the changes made by add_symbol_adjust. */
12795
12796 static bfd_boolean
12797 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12798 {
12799 struct ppc_link_hash_entry *eh;
12800
12801 if (h->root.type == bfd_link_hash_indirect)
12802 return TRUE;
12803
12804 eh = (struct ppc_link_hash_entry *) h;
12805 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12806 return TRUE;
12807
12808 eh->elf.root.type = bfd_link_hash_undefined;
12809 return TRUE;
12810 }
12811
12812 void
12813 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12814 {
12815 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12816
12817 if (htab != NULL)
12818 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12819 }
12820
12821 /* What to do when ld finds relocations against symbols defined in
12822 discarded sections. */
12823
12824 static unsigned int
12825 ppc64_elf_action_discarded (asection *sec)
12826 {
12827 if (strcmp (".opd", sec->name) == 0)
12828 return 0;
12829
12830 if (strcmp (".toc", sec->name) == 0)
12831 return 0;
12832
12833 if (strcmp (".toc1", sec->name) == 0)
12834 return 0;
12835
12836 return _bfd_elf_default_action_discarded (sec);
12837 }
12838
12839 /* The RELOCATE_SECTION function is called by the ELF backend linker
12840 to handle the relocations for a section.
12841
12842 The relocs are always passed as Rela structures; if the section
12843 actually uses Rel structures, the r_addend field will always be
12844 zero.
12845
12846 This function is responsible for adjust the section contents as
12847 necessary, and (if using Rela relocs and generating a
12848 relocatable output file) adjusting the reloc addend as
12849 necessary.
12850
12851 This function does not have to worry about setting the reloc
12852 address or the reloc symbol index.
12853
12854 LOCAL_SYMS is a pointer to the swapped in local symbols.
12855
12856 LOCAL_SECTIONS is an array giving the section in the input file
12857 corresponding to the st_shndx field of each local symbol.
12858
12859 The global hash table entry for the global symbols can be found
12860 via elf_sym_hashes (input_bfd).
12861
12862 When generating relocatable output, this function must handle
12863 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12864 going to be the section symbol corresponding to the output
12865 section, which means that the addend must be adjusted
12866 accordingly. */
12867
12868 static bfd_boolean
12869 ppc64_elf_relocate_section (bfd *output_bfd,
12870 struct bfd_link_info *info,
12871 bfd *input_bfd,
12872 asection *input_section,
12873 bfd_byte *contents,
12874 Elf_Internal_Rela *relocs,
12875 Elf_Internal_Sym *local_syms,
12876 asection **local_sections)
12877 {
12878 struct ppc_link_hash_table *htab;
12879 Elf_Internal_Shdr *symtab_hdr;
12880 struct elf_link_hash_entry **sym_hashes;
12881 Elf_Internal_Rela *rel;
12882 Elf_Internal_Rela *relend;
12883 Elf_Internal_Rela outrel;
12884 bfd_byte *loc;
12885 struct got_entry **local_got_ents;
12886 bfd_vma TOCstart;
12887 bfd_boolean ret = TRUE;
12888 bfd_boolean is_opd;
12889 /* Assume 'at' branch hints. */
12890 bfd_boolean is_isa_v2 = TRUE;
12891 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12892
12893 /* Initialize howto table if needed. */
12894 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12895 ppc_howto_init ();
12896
12897 htab = ppc_hash_table (info);
12898 if (htab == NULL)
12899 return FALSE;
12900
12901 /* Don't relocate stub sections. */
12902 if (input_section->owner == htab->stub_bfd)
12903 return TRUE;
12904
12905 BFD_ASSERT (is_ppc64_elf (input_bfd));
12906
12907 local_got_ents = elf_local_got_ents (input_bfd);
12908 TOCstart = elf_gp (output_bfd);
12909 symtab_hdr = &elf_symtab_hdr (input_bfd);
12910 sym_hashes = elf_sym_hashes (input_bfd);
12911 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12912
12913 rel = relocs;
12914 relend = relocs + input_section->reloc_count;
12915 for (; rel < relend; rel++)
12916 {
12917 enum elf_ppc64_reloc_type r_type;
12918 bfd_vma addend;
12919 bfd_reloc_status_type r;
12920 Elf_Internal_Sym *sym;
12921 asection *sec;
12922 struct elf_link_hash_entry *h_elf;
12923 struct ppc_link_hash_entry *h;
12924 struct ppc_link_hash_entry *fdh;
12925 const char *sym_name;
12926 unsigned long r_symndx, toc_symndx;
12927 bfd_vma toc_addend;
12928 unsigned char tls_mask, tls_gd, tls_type;
12929 unsigned char sym_type;
12930 bfd_vma relocation;
12931 bfd_boolean unresolved_reloc;
12932 bfd_boolean warned;
12933 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12934 unsigned int insn;
12935 unsigned int mask;
12936 struct ppc_stub_hash_entry *stub_entry;
12937 bfd_vma max_br_offset;
12938 bfd_vma from;
12939 const Elf_Internal_Rela orig_rel = *rel;
12940
12941 r_type = ELF64_R_TYPE (rel->r_info);
12942 r_symndx = ELF64_R_SYM (rel->r_info);
12943
12944 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12945 symbol of the previous ADDR64 reloc. The symbol gives us the
12946 proper TOC base to use. */
12947 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12948 && rel != relocs
12949 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12950 && is_opd)
12951 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12952
12953 sym = NULL;
12954 sec = NULL;
12955 h_elf = NULL;
12956 sym_name = NULL;
12957 unresolved_reloc = FALSE;
12958 warned = FALSE;
12959
12960 if (r_symndx < symtab_hdr->sh_info)
12961 {
12962 /* It's a local symbol. */
12963 struct _opd_sec_data *opd;
12964
12965 sym = local_syms + r_symndx;
12966 sec = local_sections[r_symndx];
12967 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12968 sym_type = ELF64_ST_TYPE (sym->st_info);
12969 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12970 opd = get_opd_info (sec);
12971 if (opd != NULL && opd->adjust != NULL)
12972 {
12973 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12974 if (adjust == -1)
12975 relocation = 0;
12976 else
12977 {
12978 /* If this is a relocation against the opd section sym
12979 and we have edited .opd, adjust the reloc addend so
12980 that ld -r and ld --emit-relocs output is correct.
12981 If it is a reloc against some other .opd symbol,
12982 then the symbol value will be adjusted later. */
12983 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12984 rel->r_addend += adjust;
12985 else
12986 relocation += adjust;
12987 }
12988 }
12989 }
12990 else
12991 {
12992 bfd_boolean ignored;
12993
12994 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12995 r_symndx, symtab_hdr, sym_hashes,
12996 h_elf, sec, relocation,
12997 unresolved_reloc, warned, ignored);
12998 sym_name = h_elf->root.root.string;
12999 sym_type = h_elf->type;
13000 if (sec != NULL
13001 && sec->owner == output_bfd
13002 && strcmp (sec->name, ".opd") == 0)
13003 {
13004 /* This is a symbol defined in a linker script. All
13005 such are defined in output sections, even those
13006 defined by simple assignment from a symbol defined in
13007 an input section. Transfer the symbol to an
13008 appropriate input .opd section, so that a branch to
13009 this symbol will be mapped to the location specified
13010 by the opd entry. */
13011 struct bfd_link_order *lo;
13012 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13013 if (lo->type == bfd_indirect_link_order)
13014 {
13015 asection *isec = lo->u.indirect.section;
13016 if (h_elf->root.u.def.value >= isec->output_offset
13017 && h_elf->root.u.def.value < (isec->output_offset
13018 + isec->size))
13019 {
13020 h_elf->root.u.def.value -= isec->output_offset;
13021 h_elf->root.u.def.section = isec;
13022 sec = isec;
13023 break;
13024 }
13025 }
13026 }
13027 }
13028 h = (struct ppc_link_hash_entry *) h_elf;
13029
13030 if (sec != NULL && discarded_section (sec))
13031 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13032 rel, 1, relend,
13033 ppc64_elf_howto_table[r_type], 0,
13034 contents);
13035
13036 if (info->relocatable)
13037 continue;
13038
13039 if (h != NULL && &h->elf == htab->elf.hgot)
13040 {
13041 relocation = (TOCstart
13042 + htab->stub_group[input_section->id].toc_off);
13043 sec = bfd_abs_section_ptr;
13044 unresolved_reloc = FALSE;
13045 }
13046
13047 /* TLS optimizations. Replace instruction sequences and relocs
13048 based on information we collected in tls_optimize. We edit
13049 RELOCS so that --emit-relocs will output something sensible
13050 for the final instruction stream. */
13051 tls_mask = 0;
13052 tls_gd = 0;
13053 toc_symndx = 0;
13054 if (h != NULL)
13055 tls_mask = h->tls_mask;
13056 else if (local_got_ents != NULL)
13057 {
13058 struct plt_entry **local_plt = (struct plt_entry **)
13059 (local_got_ents + symtab_hdr->sh_info);
13060 unsigned char *lgot_masks = (unsigned char *)
13061 (local_plt + symtab_hdr->sh_info);
13062 tls_mask = lgot_masks[r_symndx];
13063 }
13064 if (tls_mask == 0
13065 && (r_type == R_PPC64_TLS
13066 || r_type == R_PPC64_TLSGD
13067 || r_type == R_PPC64_TLSLD))
13068 {
13069 /* Check for toc tls entries. */
13070 unsigned char *toc_tls;
13071
13072 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13073 &local_syms, rel, input_bfd))
13074 return FALSE;
13075
13076 if (toc_tls)
13077 tls_mask = *toc_tls;
13078 }
13079
13080 /* Check that tls relocs are used with tls syms, and non-tls
13081 relocs are used with non-tls syms. */
13082 if (r_symndx != STN_UNDEF
13083 && r_type != R_PPC64_NONE
13084 && (h == NULL
13085 || h->elf.root.type == bfd_link_hash_defined
13086 || h->elf.root.type == bfd_link_hash_defweak)
13087 && (IS_PPC64_TLS_RELOC (r_type)
13088 != (sym_type == STT_TLS
13089 || (sym_type == STT_SECTION
13090 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13091 {
13092 if (tls_mask != 0
13093 && (r_type == R_PPC64_TLS
13094 || r_type == R_PPC64_TLSGD
13095 || r_type == R_PPC64_TLSLD))
13096 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13097 ;
13098 else
13099 info->callbacks->einfo
13100 (!IS_PPC64_TLS_RELOC (r_type)
13101 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13102 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13103 input_bfd, input_section, rel->r_offset,
13104 ppc64_elf_howto_table[r_type]->name,
13105 sym_name);
13106 }
13107
13108 /* Ensure reloc mapping code below stays sane. */
13109 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13110 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13111 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13112 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13113 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13114 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13115 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13116 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13117 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13118 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13119 abort ();
13120
13121 switch (r_type)
13122 {
13123 default:
13124 break;
13125
13126 case R_PPC64_LO_DS_OPT:
13127 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13128 if ((insn & (0x3f << 26)) != 58u << 26)
13129 abort ();
13130 insn += (14u << 26) - (58u << 26);
13131 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13132 r_type = R_PPC64_TOC16_LO;
13133 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13134 break;
13135
13136 case R_PPC64_TOC16:
13137 case R_PPC64_TOC16_LO:
13138 case R_PPC64_TOC16_DS:
13139 case R_PPC64_TOC16_LO_DS:
13140 {
13141 /* Check for toc tls entries. */
13142 unsigned char *toc_tls;
13143 int retval;
13144
13145 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13146 &local_syms, rel, input_bfd);
13147 if (retval == 0)
13148 return FALSE;
13149
13150 if (toc_tls)
13151 {
13152 tls_mask = *toc_tls;
13153 if (r_type == R_PPC64_TOC16_DS
13154 || r_type == R_PPC64_TOC16_LO_DS)
13155 {
13156 if (tls_mask != 0
13157 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13158 goto toctprel;
13159 }
13160 else
13161 {
13162 /* If we found a GD reloc pair, then we might be
13163 doing a GD->IE transition. */
13164 if (retval == 2)
13165 {
13166 tls_gd = TLS_TPRELGD;
13167 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13168 goto tls_ldgd_opt;
13169 }
13170 else if (retval == 3)
13171 {
13172 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13173 goto tls_ldgd_opt;
13174 }
13175 }
13176 }
13177 }
13178 break;
13179
13180 case R_PPC64_GOT_TPREL16_HI:
13181 case R_PPC64_GOT_TPREL16_HA:
13182 if (tls_mask != 0
13183 && (tls_mask & TLS_TPREL) == 0)
13184 {
13185 rel->r_offset -= d_offset;
13186 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13187 r_type = R_PPC64_NONE;
13188 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13189 }
13190 break;
13191
13192 case R_PPC64_GOT_TPREL16_DS:
13193 case R_PPC64_GOT_TPREL16_LO_DS:
13194 if (tls_mask != 0
13195 && (tls_mask & TLS_TPREL) == 0)
13196 {
13197 toctprel:
13198 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13199 insn &= 31 << 21;
13200 insn |= 0x3c0d0000; /* addis 0,13,0 */
13201 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13202 r_type = R_PPC64_TPREL16_HA;
13203 if (toc_symndx != 0)
13204 {
13205 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13206 rel->r_addend = toc_addend;
13207 /* We changed the symbol. Start over in order to
13208 get h, sym, sec etc. right. */
13209 rel--;
13210 continue;
13211 }
13212 else
13213 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13214 }
13215 break;
13216
13217 case R_PPC64_TLS:
13218 if (tls_mask != 0
13219 && (tls_mask & TLS_TPREL) == 0)
13220 {
13221 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13222 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13223 if (insn == 0)
13224 abort ();
13225 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13226 /* Was PPC64_TLS which sits on insn boundary, now
13227 PPC64_TPREL16_LO which is at low-order half-word. */
13228 rel->r_offset += d_offset;
13229 r_type = R_PPC64_TPREL16_LO;
13230 if (toc_symndx != 0)
13231 {
13232 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13233 rel->r_addend = toc_addend;
13234 /* We changed the symbol. Start over in order to
13235 get h, sym, sec etc. right. */
13236 rel--;
13237 continue;
13238 }
13239 else
13240 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13241 }
13242 break;
13243
13244 case R_PPC64_GOT_TLSGD16_HI:
13245 case R_PPC64_GOT_TLSGD16_HA:
13246 tls_gd = TLS_TPRELGD;
13247 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13248 goto tls_gdld_hi;
13249 break;
13250
13251 case R_PPC64_GOT_TLSLD16_HI:
13252 case R_PPC64_GOT_TLSLD16_HA:
13253 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13254 {
13255 tls_gdld_hi:
13256 if ((tls_mask & tls_gd) != 0)
13257 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13258 + R_PPC64_GOT_TPREL16_DS);
13259 else
13260 {
13261 rel->r_offset -= d_offset;
13262 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13263 r_type = R_PPC64_NONE;
13264 }
13265 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13266 }
13267 break;
13268
13269 case R_PPC64_GOT_TLSGD16:
13270 case R_PPC64_GOT_TLSGD16_LO:
13271 tls_gd = TLS_TPRELGD;
13272 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13273 goto tls_ldgd_opt;
13274 break;
13275
13276 case R_PPC64_GOT_TLSLD16:
13277 case R_PPC64_GOT_TLSLD16_LO:
13278 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13279 {
13280 unsigned int insn1, insn2, insn3;
13281 bfd_vma offset;
13282
13283 tls_ldgd_opt:
13284 offset = (bfd_vma) -1;
13285 /* If not using the newer R_PPC64_TLSGD/LD to mark
13286 __tls_get_addr calls, we must trust that the call
13287 stays with its arg setup insns, ie. that the next
13288 reloc is the __tls_get_addr call associated with
13289 the current reloc. Edit both insns. */
13290 if (input_section->has_tls_get_addr_call
13291 && rel + 1 < relend
13292 && branch_reloc_hash_match (input_bfd, rel + 1,
13293 htab->tls_get_addr,
13294 htab->tls_get_addr_fd))
13295 offset = rel[1].r_offset;
13296 if ((tls_mask & tls_gd) != 0)
13297 {
13298 /* IE */
13299 insn1 = bfd_get_32 (output_bfd,
13300 contents + rel->r_offset - d_offset);
13301 insn1 &= (1 << 26) - (1 << 2);
13302 insn1 |= 58 << 26; /* ld */
13303 insn2 = 0x7c636a14; /* add 3,3,13 */
13304 if (offset != (bfd_vma) -1)
13305 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13306 if ((tls_mask & TLS_EXPLICIT) == 0)
13307 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13308 + R_PPC64_GOT_TPREL16_DS);
13309 else
13310 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13311 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13312 }
13313 else
13314 {
13315 /* LE */
13316 insn1 = 0x3c6d0000; /* addis 3,13,0 */
13317 insn2 = 0x38630000; /* addi 3,3,0 */
13318 if (tls_gd == 0)
13319 {
13320 /* Was an LD reloc. */
13321 if (toc_symndx)
13322 sec = local_sections[toc_symndx];
13323 for (r_symndx = 0;
13324 r_symndx < symtab_hdr->sh_info;
13325 r_symndx++)
13326 if (local_sections[r_symndx] == sec)
13327 break;
13328 if (r_symndx >= symtab_hdr->sh_info)
13329 r_symndx = STN_UNDEF;
13330 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13331 if (r_symndx != STN_UNDEF)
13332 rel->r_addend -= (local_syms[r_symndx].st_value
13333 + sec->output_offset
13334 + sec->output_section->vma);
13335 }
13336 else if (toc_symndx != 0)
13337 {
13338 r_symndx = toc_symndx;
13339 rel->r_addend = toc_addend;
13340 }
13341 r_type = R_PPC64_TPREL16_HA;
13342 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13343 if (offset != (bfd_vma) -1)
13344 {
13345 rel[1].r_info = ELF64_R_INFO (r_symndx,
13346 R_PPC64_TPREL16_LO);
13347 rel[1].r_offset = offset + d_offset;
13348 rel[1].r_addend = rel->r_addend;
13349 }
13350 }
13351 bfd_put_32 (output_bfd, insn1,
13352 contents + rel->r_offset - d_offset);
13353 if (offset != (bfd_vma) -1)
13354 {
13355 insn3 = bfd_get_32 (output_bfd,
13356 contents + offset + 4);
13357 if (insn3 == NOP
13358 || insn3 == CROR_151515 || insn3 == CROR_313131)
13359 {
13360 rel[1].r_offset += 4;
13361 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13362 insn2 = NOP;
13363 }
13364 bfd_put_32 (output_bfd, insn2, contents + offset);
13365 }
13366 if ((tls_mask & tls_gd) == 0
13367 && (tls_gd == 0 || toc_symndx != 0))
13368 {
13369 /* We changed the symbol. Start over in order
13370 to get h, sym, sec etc. right. */
13371 rel--;
13372 continue;
13373 }
13374 }
13375 break;
13376
13377 case R_PPC64_TLSGD:
13378 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13379 {
13380 unsigned int insn2, insn3;
13381 bfd_vma offset = rel->r_offset;
13382
13383 if ((tls_mask & TLS_TPRELGD) != 0)
13384 {
13385 /* IE */
13386 r_type = R_PPC64_NONE;
13387 insn2 = 0x7c636a14; /* add 3,3,13 */
13388 }
13389 else
13390 {
13391 /* LE */
13392 if (toc_symndx != 0)
13393 {
13394 r_symndx = toc_symndx;
13395 rel->r_addend = toc_addend;
13396 }
13397 r_type = R_PPC64_TPREL16_LO;
13398 rel->r_offset = offset + d_offset;
13399 insn2 = 0x38630000; /* addi 3,3,0 */
13400 }
13401 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13402 /* Zap the reloc on the _tls_get_addr call too. */
13403 BFD_ASSERT (offset == rel[1].r_offset);
13404 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13405 insn3 = bfd_get_32 (output_bfd,
13406 contents + offset + 4);
13407 if (insn3 == NOP
13408 || insn3 == CROR_151515 || insn3 == CROR_313131)
13409 {
13410 rel->r_offset += 4;
13411 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13412 insn2 = NOP;
13413 }
13414 bfd_put_32 (output_bfd, insn2, contents + offset);
13415 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13416 {
13417 rel--;
13418 continue;
13419 }
13420 }
13421 break;
13422
13423 case R_PPC64_TLSLD:
13424 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13425 {
13426 unsigned int insn2, insn3;
13427 bfd_vma offset = rel->r_offset;
13428
13429 if (toc_symndx)
13430 sec = local_sections[toc_symndx];
13431 for (r_symndx = 0;
13432 r_symndx < symtab_hdr->sh_info;
13433 r_symndx++)
13434 if (local_sections[r_symndx] == sec)
13435 break;
13436 if (r_symndx >= symtab_hdr->sh_info)
13437 r_symndx = STN_UNDEF;
13438 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13439 if (r_symndx != STN_UNDEF)
13440 rel->r_addend -= (local_syms[r_symndx].st_value
13441 + sec->output_offset
13442 + sec->output_section->vma);
13443
13444 r_type = R_PPC64_TPREL16_LO;
13445 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13446 rel->r_offset = offset + d_offset;
13447 /* Zap the reloc on the _tls_get_addr call too. */
13448 BFD_ASSERT (offset == rel[1].r_offset);
13449 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13450 insn2 = 0x38630000; /* addi 3,3,0 */
13451 insn3 = bfd_get_32 (output_bfd,
13452 contents + offset + 4);
13453 if (insn3 == NOP
13454 || insn3 == CROR_151515 || insn3 == CROR_313131)
13455 {
13456 rel->r_offset += 4;
13457 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13458 insn2 = NOP;
13459 }
13460 bfd_put_32 (output_bfd, insn2, contents + offset);
13461 rel--;
13462 continue;
13463 }
13464 break;
13465
13466 case R_PPC64_DTPMOD64:
13467 if (rel + 1 < relend
13468 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13469 && rel[1].r_offset == rel->r_offset + 8)
13470 {
13471 if ((tls_mask & TLS_GD) == 0)
13472 {
13473 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13474 if ((tls_mask & TLS_TPRELGD) != 0)
13475 r_type = R_PPC64_TPREL64;
13476 else
13477 {
13478 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13479 r_type = R_PPC64_NONE;
13480 }
13481 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13482 }
13483 }
13484 else
13485 {
13486 if ((tls_mask & TLS_LD) == 0)
13487 {
13488 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13489 r_type = R_PPC64_NONE;
13490 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13491 }
13492 }
13493 break;
13494
13495 case R_PPC64_TPREL64:
13496 if ((tls_mask & TLS_TPREL) == 0)
13497 {
13498 r_type = R_PPC64_NONE;
13499 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13500 }
13501 break;
13502
13503 case R_PPC64_REL16_HA:
13504 /* If we are generating a non-PIC executable, edit
13505 . 0: addis 2,12,.TOC.-0b@ha
13506 . addi 2,2,.TOC.-0b@l
13507 used by ELFv2 global entry points to set up r2, to
13508 . lis 2,.TOC.@ha
13509 . addi 2,2,.TOC.@l
13510 if .TOC. is in range. */
13511 if (!info->shared
13512 && h != NULL && &h->elf == htab->elf.hgot
13513 && rel + 1 < relend
13514 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13515 && rel[1].r_offset == rel->r_offset + 4
13516 && rel[1].r_addend == rel->r_addend + 4
13517 && relocation + 0x80008000 <= 0xffffffff)
13518 {
13519 unsigned int insn1, insn2;
13520 bfd_vma offset = rel->r_offset - d_offset;
13521 insn1 = bfd_get_32 (output_bfd, contents + offset);
13522 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13523 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13524 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13525 {
13526 r_type = R_PPC64_ADDR16_HA;
13527 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13528 rel->r_addend -= d_offset;
13529 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13530 rel[1].r_addend -= d_offset + 4;
13531 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13532 }
13533 }
13534 break;
13535 }
13536
13537 /* Handle other relocations that tweak non-addend part of insn. */
13538 insn = 0;
13539 max_br_offset = 1 << 25;
13540 addend = rel->r_addend;
13541 reloc_dest = DEST_NORMAL;
13542 switch (r_type)
13543 {
13544 default:
13545 break;
13546
13547 case R_PPC64_TOCSAVE:
13548 if (relocation + addend == (rel->r_offset
13549 + input_section->output_offset
13550 + input_section->output_section->vma)
13551 && tocsave_find (htab, NO_INSERT,
13552 &local_syms, rel, input_bfd))
13553 {
13554 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13555 if (insn == NOP
13556 || insn == CROR_151515 || insn == CROR_313131)
13557 bfd_put_32 (input_bfd,
13558 STD_R2_0R1 + STK_TOC (htab),
13559 contents + rel->r_offset);
13560 }
13561 break;
13562
13563 /* Branch taken prediction relocations. */
13564 case R_PPC64_ADDR14_BRTAKEN:
13565 case R_PPC64_REL14_BRTAKEN:
13566 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13567 /* Fall thru. */
13568
13569 /* Branch not taken prediction relocations. */
13570 case R_PPC64_ADDR14_BRNTAKEN:
13571 case R_PPC64_REL14_BRNTAKEN:
13572 insn |= bfd_get_32 (output_bfd,
13573 contents + rel->r_offset) & ~(0x01 << 21);
13574 /* Fall thru. */
13575
13576 case R_PPC64_REL14:
13577 max_br_offset = 1 << 15;
13578 /* Fall thru. */
13579
13580 case R_PPC64_REL24:
13581 /* Calls to functions with a different TOC, such as calls to
13582 shared objects, need to alter the TOC pointer. This is
13583 done using a linkage stub. A REL24 branching to these
13584 linkage stubs needs to be followed by a nop, as the nop
13585 will be replaced with an instruction to restore the TOC
13586 base pointer. */
13587 fdh = h;
13588 if (h != NULL
13589 && h->oh != NULL
13590 && h->oh->is_func_descriptor)
13591 fdh = ppc_follow_link (h->oh);
13592 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13593 htab);
13594 if (stub_entry != NULL
13595 && (stub_entry->stub_type == ppc_stub_plt_call
13596 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13597 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13598 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13599 {
13600 bfd_boolean can_plt_call = FALSE;
13601
13602 /* All of these stubs will modify r2, so there must be a
13603 branch and link followed by a nop. The nop is
13604 replaced by an insn to restore r2. */
13605 if (rel->r_offset + 8 <= input_section->size)
13606 {
13607 unsigned long br;
13608
13609 br = bfd_get_32 (input_bfd,
13610 contents + rel->r_offset);
13611 if ((br & 1) != 0)
13612 {
13613 unsigned long nop;
13614
13615 nop = bfd_get_32 (input_bfd,
13616 contents + rel->r_offset + 4);
13617 if (nop == NOP
13618 || nop == CROR_151515 || nop == CROR_313131)
13619 {
13620 if (h != NULL
13621 && (h == htab->tls_get_addr_fd
13622 || h == htab->tls_get_addr)
13623 && !htab->no_tls_get_addr_opt)
13624 {
13625 /* Special stub used, leave nop alone. */
13626 }
13627 else
13628 bfd_put_32 (input_bfd,
13629 LD_R2_0R1 + STK_TOC (htab),
13630 contents + rel->r_offset + 4);
13631 can_plt_call = TRUE;
13632 }
13633 }
13634 }
13635
13636 if (!can_plt_call && h != NULL)
13637 {
13638 const char *name = h->elf.root.root.string;
13639
13640 if (*name == '.')
13641 ++name;
13642
13643 if (strncmp (name, "__libc_start_main", 17) == 0
13644 && (name[17] == 0 || name[17] == '@'))
13645 {
13646 /* Allow crt1 branch to go via a toc adjusting
13647 stub. Other calls that never return could do
13648 the same, if we could detect such. */
13649 can_plt_call = TRUE;
13650 }
13651 }
13652
13653 if (!can_plt_call)
13654 {
13655 /* g++ as of 20130507 emits self-calls without a
13656 following nop. This is arguably wrong since we
13657 have conflicting information. On the one hand a
13658 global symbol and on the other a local call
13659 sequence, but don't error for this special case.
13660 It isn't possible to cheaply verify we have
13661 exactly such a call. Allow all calls to the same
13662 section. */
13663 asection *code_sec = sec;
13664
13665 if (get_opd_info (sec) != NULL)
13666 {
13667 bfd_vma off = (relocation + addend
13668 - sec->output_section->vma
13669 - sec->output_offset);
13670
13671 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13672 }
13673 if (code_sec == input_section)
13674 can_plt_call = TRUE;
13675 }
13676
13677 if (!can_plt_call)
13678 {
13679 info->callbacks->einfo
13680 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13681 "recompile with -fPIC\n"),
13682 input_bfd, input_section, rel->r_offset, sym_name);
13683
13684 bfd_set_error (bfd_error_bad_value);
13685 ret = FALSE;
13686 }
13687
13688 if (can_plt_call
13689 && (stub_entry->stub_type == ppc_stub_plt_call
13690 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13691 unresolved_reloc = FALSE;
13692 }
13693
13694 if ((stub_entry == NULL
13695 || stub_entry->stub_type == ppc_stub_long_branch
13696 || stub_entry->stub_type == ppc_stub_plt_branch)
13697 && get_opd_info (sec) != NULL)
13698 {
13699 /* The branch destination is the value of the opd entry. */
13700 bfd_vma off = (relocation + addend
13701 - sec->output_section->vma
13702 - sec->output_offset);
13703 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13704 if (dest != (bfd_vma) -1)
13705 {
13706 relocation = dest;
13707 addend = 0;
13708 reloc_dest = DEST_OPD;
13709 }
13710 }
13711
13712 /* If the branch is out of reach we ought to have a long
13713 branch stub. */
13714 from = (rel->r_offset
13715 + input_section->output_offset
13716 + input_section->output_section->vma);
13717
13718 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13719 ? fdh->elf.other
13720 : sym->st_other);
13721
13722 if (stub_entry != NULL
13723 && (stub_entry->stub_type == ppc_stub_long_branch
13724 || stub_entry->stub_type == ppc_stub_plt_branch)
13725 && (r_type == R_PPC64_ADDR14_BRTAKEN
13726 || r_type == R_PPC64_ADDR14_BRNTAKEN
13727 || (relocation + addend - from + max_br_offset
13728 < 2 * max_br_offset)))
13729 /* Don't use the stub if this branch is in range. */
13730 stub_entry = NULL;
13731
13732 if (stub_entry != NULL)
13733 {
13734 /* Munge up the value and addend so that we call the stub
13735 rather than the procedure directly. */
13736 relocation = (stub_entry->stub_offset
13737 + stub_entry->stub_sec->output_offset
13738 + stub_entry->stub_sec->output_section->vma);
13739 addend = 0;
13740 reloc_dest = DEST_STUB;
13741
13742 if ((stub_entry->stub_type == ppc_stub_plt_call
13743 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13744 && (ALWAYS_EMIT_R2SAVE
13745 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13746 && rel + 1 < relend
13747 && rel[1].r_offset == rel->r_offset + 4
13748 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13749 relocation += 4;
13750 }
13751
13752 if (insn != 0)
13753 {
13754 if (is_isa_v2)
13755 {
13756 /* Set 'a' bit. This is 0b00010 in BO field for branch
13757 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13758 for branch on CTR insns (BO == 1a00t or 1a01t). */
13759 if ((insn & (0x14 << 21)) == (0x04 << 21))
13760 insn |= 0x02 << 21;
13761 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13762 insn |= 0x08 << 21;
13763 else
13764 break;
13765 }
13766 else
13767 {
13768 /* Invert 'y' bit if not the default. */
13769 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13770 insn ^= 0x01 << 21;
13771 }
13772
13773 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13774 }
13775
13776 /* NOP out calls to undefined weak functions.
13777 We can thus call a weak function without first
13778 checking whether the function is defined. */
13779 else if (h != NULL
13780 && h->elf.root.type == bfd_link_hash_undefweak
13781 && h->elf.dynindx == -1
13782 && r_type == R_PPC64_REL24
13783 && relocation == 0
13784 && addend == 0)
13785 {
13786 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13787 continue;
13788 }
13789 break;
13790 }
13791
13792 /* Set `addend'. */
13793 tls_type = 0;
13794 switch (r_type)
13795 {
13796 default:
13797 info->callbacks->einfo
13798 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13799 input_bfd, (int) r_type, sym_name);
13800
13801 bfd_set_error (bfd_error_bad_value);
13802 ret = FALSE;
13803 continue;
13804
13805 case R_PPC64_NONE:
13806 case R_PPC64_TLS:
13807 case R_PPC64_TLSGD:
13808 case R_PPC64_TLSLD:
13809 case R_PPC64_TOCSAVE:
13810 case R_PPC64_GNU_VTINHERIT:
13811 case R_PPC64_GNU_VTENTRY:
13812 continue;
13813
13814 /* GOT16 relocations. Like an ADDR16 using the symbol's
13815 address in the GOT as relocation value instead of the
13816 symbol's value itself. Also, create a GOT entry for the
13817 symbol and put the symbol value there. */
13818 case R_PPC64_GOT_TLSGD16:
13819 case R_PPC64_GOT_TLSGD16_LO:
13820 case R_PPC64_GOT_TLSGD16_HI:
13821 case R_PPC64_GOT_TLSGD16_HA:
13822 tls_type = TLS_TLS | TLS_GD;
13823 goto dogot;
13824
13825 case R_PPC64_GOT_TLSLD16:
13826 case R_PPC64_GOT_TLSLD16_LO:
13827 case R_PPC64_GOT_TLSLD16_HI:
13828 case R_PPC64_GOT_TLSLD16_HA:
13829 tls_type = TLS_TLS | TLS_LD;
13830 goto dogot;
13831
13832 case R_PPC64_GOT_TPREL16_DS:
13833 case R_PPC64_GOT_TPREL16_LO_DS:
13834 case R_PPC64_GOT_TPREL16_HI:
13835 case R_PPC64_GOT_TPREL16_HA:
13836 tls_type = TLS_TLS | TLS_TPREL;
13837 goto dogot;
13838
13839 case R_PPC64_GOT_DTPREL16_DS:
13840 case R_PPC64_GOT_DTPREL16_LO_DS:
13841 case R_PPC64_GOT_DTPREL16_HI:
13842 case R_PPC64_GOT_DTPREL16_HA:
13843 tls_type = TLS_TLS | TLS_DTPREL;
13844 goto dogot;
13845
13846 case R_PPC64_GOT16:
13847 case R_PPC64_GOT16_LO:
13848 case R_PPC64_GOT16_HI:
13849 case R_PPC64_GOT16_HA:
13850 case R_PPC64_GOT16_DS:
13851 case R_PPC64_GOT16_LO_DS:
13852 dogot:
13853 {
13854 /* Relocation is to the entry for this symbol in the global
13855 offset table. */
13856 asection *got;
13857 bfd_vma *offp;
13858 bfd_vma off;
13859 unsigned long indx = 0;
13860 struct got_entry *ent;
13861
13862 if (tls_type == (TLS_TLS | TLS_LD)
13863 && (h == NULL
13864 || !h->elf.def_dynamic))
13865 ent = ppc64_tlsld_got (input_bfd);
13866 else
13867 {
13868
13869 if (h != NULL)
13870 {
13871 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13872 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13873 &h->elf)
13874 || (info->shared
13875 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
13876 /* This is actually a static link, or it is a
13877 -Bsymbolic link and the symbol is defined
13878 locally, or the symbol was forced to be local
13879 because of a version file. */
13880 ;
13881 else
13882 {
13883 BFD_ASSERT (h->elf.dynindx != -1);
13884 indx = h->elf.dynindx;
13885 unresolved_reloc = FALSE;
13886 }
13887 ent = h->elf.got.glist;
13888 }
13889 else
13890 {
13891 if (local_got_ents == NULL)
13892 abort ();
13893 ent = local_got_ents[r_symndx];
13894 }
13895
13896 for (; ent != NULL; ent = ent->next)
13897 if (ent->addend == orig_rel.r_addend
13898 && ent->owner == input_bfd
13899 && ent->tls_type == tls_type)
13900 break;
13901 }
13902
13903 if (ent == NULL)
13904 abort ();
13905 if (ent->is_indirect)
13906 ent = ent->got.ent;
13907 offp = &ent->got.offset;
13908 got = ppc64_elf_tdata (ent->owner)->got;
13909 if (got == NULL)
13910 abort ();
13911
13912 /* The offset must always be a multiple of 8. We use the
13913 least significant bit to record whether we have already
13914 processed this entry. */
13915 off = *offp;
13916 if ((off & 1) != 0)
13917 off &= ~1;
13918 else
13919 {
13920 /* Generate relocs for the dynamic linker, except in
13921 the case of TLSLD where we'll use one entry per
13922 module. */
13923 asection *relgot;
13924 bfd_boolean ifunc;
13925
13926 *offp = off | 1;
13927 relgot = NULL;
13928 ifunc = (h != NULL
13929 ? h->elf.type == STT_GNU_IFUNC
13930 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13931 if (ifunc)
13932 relgot = htab->elf.irelplt;
13933 else if ((info->shared || indx != 0)
13934 && (h == NULL
13935 || (tls_type == (TLS_TLS | TLS_LD)
13936 && !h->elf.def_dynamic)
13937 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13938 || h->elf.root.type != bfd_link_hash_undefweak))
13939 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13940 if (relgot != NULL)
13941 {
13942 outrel.r_offset = (got->output_section->vma
13943 + got->output_offset
13944 + off);
13945 outrel.r_addend = addend;
13946 if (tls_type & (TLS_LD | TLS_GD))
13947 {
13948 outrel.r_addend = 0;
13949 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13950 if (tls_type == (TLS_TLS | TLS_GD))
13951 {
13952 loc = relgot->contents;
13953 loc += (relgot->reloc_count++
13954 * sizeof (Elf64_External_Rela));
13955 bfd_elf64_swap_reloca_out (output_bfd,
13956 &outrel, loc);
13957 outrel.r_offset += 8;
13958 outrel.r_addend = addend;
13959 outrel.r_info
13960 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13961 }
13962 }
13963 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13964 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13965 else if (tls_type == (TLS_TLS | TLS_TPREL))
13966 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13967 else if (indx != 0)
13968 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13969 else
13970 {
13971 if (ifunc)
13972 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13973 else
13974 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13975
13976 /* Write the .got section contents for the sake
13977 of prelink. */
13978 loc = got->contents + off;
13979 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13980 loc);
13981 }
13982
13983 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13984 {
13985 outrel.r_addend += relocation;
13986 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13987 outrel.r_addend -= htab->elf.tls_sec->vma;
13988 }
13989 loc = relgot->contents;
13990 loc += (relgot->reloc_count++
13991 * sizeof (Elf64_External_Rela));
13992 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13993 }
13994
13995 /* Init the .got section contents here if we're not
13996 emitting a reloc. */
13997 else
13998 {
13999 relocation += addend;
14000 if (tls_type == (TLS_TLS | TLS_LD))
14001 relocation = 1;
14002 else if (tls_type != 0)
14003 {
14004 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14005 if (tls_type == (TLS_TLS | TLS_TPREL))
14006 relocation += DTP_OFFSET - TP_OFFSET;
14007
14008 if (tls_type == (TLS_TLS | TLS_GD))
14009 {
14010 bfd_put_64 (output_bfd, relocation,
14011 got->contents + off + 8);
14012 relocation = 1;
14013 }
14014 }
14015
14016 bfd_put_64 (output_bfd, relocation,
14017 got->contents + off);
14018 }
14019 }
14020
14021 if (off >= (bfd_vma) -2)
14022 abort ();
14023
14024 relocation = got->output_section->vma + got->output_offset + off;
14025 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14026 }
14027 break;
14028
14029 case R_PPC64_PLT16_HA:
14030 case R_PPC64_PLT16_HI:
14031 case R_PPC64_PLT16_LO:
14032 case R_PPC64_PLT32:
14033 case R_PPC64_PLT64:
14034 /* Relocation is to the entry for this symbol in the
14035 procedure linkage table. */
14036
14037 /* Resolve a PLT reloc against a local symbol directly,
14038 without using the procedure linkage table. */
14039 if (h == NULL)
14040 break;
14041
14042 /* It's possible that we didn't make a PLT entry for this
14043 symbol. This happens when statically linking PIC code,
14044 or when using -Bsymbolic. Go find a match if there is a
14045 PLT entry. */
14046 if (htab->elf.splt != NULL)
14047 {
14048 struct plt_entry *ent;
14049 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14050 if (ent->plt.offset != (bfd_vma) -1
14051 && ent->addend == orig_rel.r_addend)
14052 {
14053 relocation = (htab->elf.splt->output_section->vma
14054 + htab->elf.splt->output_offset
14055 + ent->plt.offset);
14056 unresolved_reloc = FALSE;
14057 break;
14058 }
14059 }
14060 break;
14061
14062 case R_PPC64_TOC:
14063 /* Relocation value is TOC base. */
14064 relocation = TOCstart;
14065 if (r_symndx == STN_UNDEF)
14066 relocation += htab->stub_group[input_section->id].toc_off;
14067 else if (unresolved_reloc)
14068 ;
14069 else if (sec != NULL && sec->id <= htab->top_id)
14070 relocation += htab->stub_group[sec->id].toc_off;
14071 else
14072 unresolved_reloc = TRUE;
14073 goto dodyn;
14074
14075 /* TOC16 relocs. We want the offset relative to the TOC base,
14076 which is the address of the start of the TOC plus 0x8000.
14077 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14078 in this order. */
14079 case R_PPC64_TOC16:
14080 case R_PPC64_TOC16_LO:
14081 case R_PPC64_TOC16_HI:
14082 case R_PPC64_TOC16_DS:
14083 case R_PPC64_TOC16_LO_DS:
14084 case R_PPC64_TOC16_HA:
14085 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14086 break;
14087
14088 /* Relocate against the beginning of the section. */
14089 case R_PPC64_SECTOFF:
14090 case R_PPC64_SECTOFF_LO:
14091 case R_PPC64_SECTOFF_HI:
14092 case R_PPC64_SECTOFF_DS:
14093 case R_PPC64_SECTOFF_LO_DS:
14094 case R_PPC64_SECTOFF_HA:
14095 if (sec != NULL)
14096 addend -= sec->output_section->vma;
14097 break;
14098
14099 case R_PPC64_REL16:
14100 case R_PPC64_REL16_LO:
14101 case R_PPC64_REL16_HI:
14102 case R_PPC64_REL16_HA:
14103 break;
14104
14105 case R_PPC64_REL14:
14106 case R_PPC64_REL14_BRNTAKEN:
14107 case R_PPC64_REL14_BRTAKEN:
14108 case R_PPC64_REL24:
14109 break;
14110
14111 case R_PPC64_TPREL16:
14112 case R_PPC64_TPREL16_LO:
14113 case R_PPC64_TPREL16_HI:
14114 case R_PPC64_TPREL16_HA:
14115 case R_PPC64_TPREL16_DS:
14116 case R_PPC64_TPREL16_LO_DS:
14117 case R_PPC64_TPREL16_HIGH:
14118 case R_PPC64_TPREL16_HIGHA:
14119 case R_PPC64_TPREL16_HIGHER:
14120 case R_PPC64_TPREL16_HIGHERA:
14121 case R_PPC64_TPREL16_HIGHEST:
14122 case R_PPC64_TPREL16_HIGHESTA:
14123 if (h != NULL
14124 && h->elf.root.type == bfd_link_hash_undefweak
14125 && h->elf.dynindx == -1)
14126 {
14127 /* Make this relocation against an undefined weak symbol
14128 resolve to zero. This is really just a tweak, since
14129 code using weak externs ought to check that they are
14130 defined before using them. */
14131 bfd_byte *p = contents + rel->r_offset - d_offset;
14132
14133 insn = bfd_get_32 (output_bfd, p);
14134 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14135 if (insn != 0)
14136 bfd_put_32 (output_bfd, insn, p);
14137 break;
14138 }
14139 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14140 if (info->shared)
14141 /* The TPREL16 relocs shouldn't really be used in shared
14142 libs as they will result in DT_TEXTREL being set, but
14143 support them anyway. */
14144 goto dodyn;
14145 break;
14146
14147 case R_PPC64_DTPREL16:
14148 case R_PPC64_DTPREL16_LO:
14149 case R_PPC64_DTPREL16_HI:
14150 case R_PPC64_DTPREL16_HA:
14151 case R_PPC64_DTPREL16_DS:
14152 case R_PPC64_DTPREL16_LO_DS:
14153 case R_PPC64_DTPREL16_HIGH:
14154 case R_PPC64_DTPREL16_HIGHA:
14155 case R_PPC64_DTPREL16_HIGHER:
14156 case R_PPC64_DTPREL16_HIGHERA:
14157 case R_PPC64_DTPREL16_HIGHEST:
14158 case R_PPC64_DTPREL16_HIGHESTA:
14159 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14160 break;
14161
14162 case R_PPC64_DTPMOD64:
14163 relocation = 1;
14164 addend = 0;
14165 goto dodyn;
14166
14167 case R_PPC64_TPREL64:
14168 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14169 goto dodyn;
14170
14171 case R_PPC64_DTPREL64:
14172 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14173 /* Fall thru */
14174
14175 /* Relocations that may need to be propagated if this is a
14176 dynamic object. */
14177 case R_PPC64_REL30:
14178 case R_PPC64_REL32:
14179 case R_PPC64_REL64:
14180 case R_PPC64_ADDR14:
14181 case R_PPC64_ADDR14_BRNTAKEN:
14182 case R_PPC64_ADDR14_BRTAKEN:
14183 case R_PPC64_ADDR16:
14184 case R_PPC64_ADDR16_DS:
14185 case R_PPC64_ADDR16_HA:
14186 case R_PPC64_ADDR16_HI:
14187 case R_PPC64_ADDR16_HIGH:
14188 case R_PPC64_ADDR16_HIGHA:
14189 case R_PPC64_ADDR16_HIGHER:
14190 case R_PPC64_ADDR16_HIGHERA:
14191 case R_PPC64_ADDR16_HIGHEST:
14192 case R_PPC64_ADDR16_HIGHESTA:
14193 case R_PPC64_ADDR16_LO:
14194 case R_PPC64_ADDR16_LO_DS:
14195 case R_PPC64_ADDR24:
14196 case R_PPC64_ADDR32:
14197 case R_PPC64_ADDR64:
14198 case R_PPC64_UADDR16:
14199 case R_PPC64_UADDR32:
14200 case R_PPC64_UADDR64:
14201 dodyn:
14202 if ((input_section->flags & SEC_ALLOC) == 0)
14203 break;
14204
14205 if (NO_OPD_RELOCS && is_opd)
14206 break;
14207
14208 if ((info->shared
14209 && (h == NULL
14210 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14211 || h->elf.root.type != bfd_link_hash_undefweak)
14212 && (must_be_dyn_reloc (info, r_type)
14213 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14214 || (ELIMINATE_COPY_RELOCS
14215 && !info->shared
14216 && h != NULL
14217 && h->elf.dynindx != -1
14218 && !h->elf.non_got_ref
14219 && !h->elf.def_regular)
14220 || (!info->shared
14221 && (h != NULL
14222 ? h->elf.type == STT_GNU_IFUNC
14223 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14224 {
14225 bfd_boolean skip, relocate;
14226 asection *sreloc;
14227 bfd_vma out_off;
14228
14229 /* When generating a dynamic object, these relocations
14230 are copied into the output file to be resolved at run
14231 time. */
14232
14233 skip = FALSE;
14234 relocate = FALSE;
14235
14236 out_off = _bfd_elf_section_offset (output_bfd, info,
14237 input_section, rel->r_offset);
14238 if (out_off == (bfd_vma) -1)
14239 skip = TRUE;
14240 else if (out_off == (bfd_vma) -2)
14241 skip = TRUE, relocate = TRUE;
14242 out_off += (input_section->output_section->vma
14243 + input_section->output_offset);
14244 outrel.r_offset = out_off;
14245 outrel.r_addend = rel->r_addend;
14246
14247 /* Optimize unaligned reloc use. */
14248 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14249 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14250 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14251 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14252 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14253 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14254 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14255 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14256 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14257
14258 if (skip)
14259 memset (&outrel, 0, sizeof outrel);
14260 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14261 && !is_opd
14262 && r_type != R_PPC64_TOC)
14263 {
14264 BFD_ASSERT (h->elf.dynindx != -1);
14265 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14266 }
14267 else
14268 {
14269 /* This symbol is local, or marked to become local,
14270 or this is an opd section reloc which must point
14271 at a local function. */
14272 outrel.r_addend += relocation;
14273 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14274 {
14275 if (is_opd && h != NULL)
14276 {
14277 /* Lie about opd entries. This case occurs
14278 when building shared libraries and we
14279 reference a function in another shared
14280 lib. The same thing happens for a weak
14281 definition in an application that's
14282 overridden by a strong definition in a
14283 shared lib. (I believe this is a generic
14284 bug in binutils handling of weak syms.)
14285 In these cases we won't use the opd
14286 entry in this lib. */
14287 unresolved_reloc = FALSE;
14288 }
14289 if (!is_opd
14290 && r_type == R_PPC64_ADDR64
14291 && (h != NULL
14292 ? h->elf.type == STT_GNU_IFUNC
14293 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14294 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14295 else
14296 {
14297 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14298
14299 /* We need to relocate .opd contents for ld.so.
14300 Prelink also wants simple and consistent rules
14301 for relocs. This make all RELATIVE relocs have
14302 *r_offset equal to r_addend. */
14303 relocate = TRUE;
14304 }
14305 }
14306 else
14307 {
14308 long indx = 0;
14309
14310 if (h != NULL
14311 ? h->elf.type == STT_GNU_IFUNC
14312 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14313 {
14314 info->callbacks->einfo
14315 (_("%P: %H: %s for indirect "
14316 "function `%T' unsupported\n"),
14317 input_bfd, input_section, rel->r_offset,
14318 ppc64_elf_howto_table[r_type]->name,
14319 sym_name);
14320 ret = FALSE;
14321 }
14322 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14323 ;
14324 else if (sec == NULL || sec->owner == NULL)
14325 {
14326 bfd_set_error (bfd_error_bad_value);
14327 return FALSE;
14328 }
14329 else
14330 {
14331 asection *osec;
14332
14333 osec = sec->output_section;
14334 indx = elf_section_data (osec)->dynindx;
14335
14336 if (indx == 0)
14337 {
14338 if ((osec->flags & SEC_READONLY) == 0
14339 && htab->elf.data_index_section != NULL)
14340 osec = htab->elf.data_index_section;
14341 else
14342 osec = htab->elf.text_index_section;
14343 indx = elf_section_data (osec)->dynindx;
14344 }
14345 BFD_ASSERT (indx != 0);
14346
14347 /* We are turning this relocation into one
14348 against a section symbol, so subtract out
14349 the output section's address but not the
14350 offset of the input section in the output
14351 section. */
14352 outrel.r_addend -= osec->vma;
14353 }
14354
14355 outrel.r_info = ELF64_R_INFO (indx, r_type);
14356 }
14357 }
14358
14359 sreloc = elf_section_data (input_section)->sreloc;
14360 if (h != NULL
14361 ? h->elf.type == STT_GNU_IFUNC
14362 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14363 sreloc = htab->elf.irelplt;
14364 if (sreloc == NULL)
14365 abort ();
14366
14367 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14368 >= sreloc->size)
14369 abort ();
14370 loc = sreloc->contents;
14371 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14372 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14373
14374 /* If this reloc is against an external symbol, it will
14375 be computed at runtime, so there's no need to do
14376 anything now. However, for the sake of prelink ensure
14377 that the section contents are a known value. */
14378 if (! relocate)
14379 {
14380 unresolved_reloc = FALSE;
14381 /* The value chosen here is quite arbitrary as ld.so
14382 ignores section contents except for the special
14383 case of .opd where the contents might be accessed
14384 before relocation. Choose zero, as that won't
14385 cause reloc overflow. */
14386 relocation = 0;
14387 addend = 0;
14388 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14389 to improve backward compatibility with older
14390 versions of ld. */
14391 if (r_type == R_PPC64_ADDR64)
14392 addend = outrel.r_addend;
14393 /* Adjust pc_relative relocs to have zero in *r_offset. */
14394 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14395 addend = (input_section->output_section->vma
14396 + input_section->output_offset
14397 + rel->r_offset);
14398 }
14399 }
14400 break;
14401
14402 case R_PPC64_COPY:
14403 case R_PPC64_GLOB_DAT:
14404 case R_PPC64_JMP_SLOT:
14405 case R_PPC64_JMP_IREL:
14406 case R_PPC64_RELATIVE:
14407 /* We shouldn't ever see these dynamic relocs in relocatable
14408 files. */
14409 /* Fall through. */
14410
14411 case R_PPC64_PLTGOT16:
14412 case R_PPC64_PLTGOT16_DS:
14413 case R_PPC64_PLTGOT16_HA:
14414 case R_PPC64_PLTGOT16_HI:
14415 case R_PPC64_PLTGOT16_LO:
14416 case R_PPC64_PLTGOT16_LO_DS:
14417 case R_PPC64_PLTREL32:
14418 case R_PPC64_PLTREL64:
14419 /* These ones haven't been implemented yet. */
14420
14421 info->callbacks->einfo
14422 (_("%P: %B: %s is not supported for `%T'\n"),
14423 input_bfd,
14424 ppc64_elf_howto_table[r_type]->name, sym_name);
14425
14426 bfd_set_error (bfd_error_invalid_operation);
14427 ret = FALSE;
14428 continue;
14429 }
14430
14431 /* Multi-instruction sequences that access the TOC can be
14432 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14433 to nop; addi rb,r2,x; */
14434 switch (r_type)
14435 {
14436 default:
14437 break;
14438
14439 case R_PPC64_GOT_TLSLD16_HI:
14440 case R_PPC64_GOT_TLSGD16_HI:
14441 case R_PPC64_GOT_TPREL16_HI:
14442 case R_PPC64_GOT_DTPREL16_HI:
14443 case R_PPC64_GOT16_HI:
14444 case R_PPC64_TOC16_HI:
14445 /* These relocs would only be useful if building up an
14446 offset to later add to r2, perhaps in an indexed
14447 addressing mode instruction. Don't try to optimize.
14448 Unfortunately, the possibility of someone building up an
14449 offset like this or even with the HA relocs, means that
14450 we need to check the high insn when optimizing the low
14451 insn. */
14452 break;
14453
14454 case R_PPC64_GOT_TLSLD16_HA:
14455 case R_PPC64_GOT_TLSGD16_HA:
14456 case R_PPC64_GOT_TPREL16_HA:
14457 case R_PPC64_GOT_DTPREL16_HA:
14458 case R_PPC64_GOT16_HA:
14459 case R_PPC64_TOC16_HA:
14460 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14461 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14462 {
14463 bfd_byte *p = contents + (rel->r_offset & ~3);
14464 bfd_put_32 (input_bfd, NOP, p);
14465 }
14466 break;
14467
14468 case R_PPC64_GOT_TLSLD16_LO:
14469 case R_PPC64_GOT_TLSGD16_LO:
14470 case R_PPC64_GOT_TPREL16_LO_DS:
14471 case R_PPC64_GOT_DTPREL16_LO_DS:
14472 case R_PPC64_GOT16_LO:
14473 case R_PPC64_GOT16_LO_DS:
14474 case R_PPC64_TOC16_LO:
14475 case R_PPC64_TOC16_LO_DS:
14476 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14477 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14478 {
14479 bfd_byte *p = contents + (rel->r_offset & ~3);
14480 insn = bfd_get_32 (input_bfd, p);
14481 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14482 {
14483 /* Transform addic to addi when we change reg. */
14484 insn &= ~((0x3f << 26) | (0x1f << 16));
14485 insn |= (14u << 26) | (2 << 16);
14486 }
14487 else
14488 {
14489 insn &= ~(0x1f << 16);
14490 insn |= 2 << 16;
14491 }
14492 bfd_put_32 (input_bfd, insn, p);
14493 }
14494 break;
14495 }
14496
14497 /* Do any further special processing. */
14498 switch (r_type)
14499 {
14500 default:
14501 break;
14502
14503 case R_PPC64_REL16_HA:
14504 case R_PPC64_ADDR16_HA:
14505 case R_PPC64_ADDR16_HIGHA:
14506 case R_PPC64_ADDR16_HIGHERA:
14507 case R_PPC64_ADDR16_HIGHESTA:
14508 case R_PPC64_TOC16_HA:
14509 case R_PPC64_SECTOFF_HA:
14510 case R_PPC64_TPREL16_HA:
14511 case R_PPC64_TPREL16_HIGHA:
14512 case R_PPC64_TPREL16_HIGHERA:
14513 case R_PPC64_TPREL16_HIGHESTA:
14514 case R_PPC64_DTPREL16_HA:
14515 case R_PPC64_DTPREL16_HIGHA:
14516 case R_PPC64_DTPREL16_HIGHERA:
14517 case R_PPC64_DTPREL16_HIGHESTA:
14518 /* It's just possible that this symbol is a weak symbol
14519 that's not actually defined anywhere. In that case,
14520 'sec' would be NULL, and we should leave the symbol
14521 alone (it will be set to zero elsewhere in the link). */
14522 if (sec == NULL)
14523 break;
14524 /* Fall thru */
14525
14526 case R_PPC64_GOT16_HA:
14527 case R_PPC64_PLTGOT16_HA:
14528 case R_PPC64_PLT16_HA:
14529 case R_PPC64_GOT_TLSGD16_HA:
14530 case R_PPC64_GOT_TLSLD16_HA:
14531 case R_PPC64_GOT_TPREL16_HA:
14532 case R_PPC64_GOT_DTPREL16_HA:
14533 /* Add 0x10000 if sign bit in 0:15 is set.
14534 Bits 0:15 are not used. */
14535 addend += 0x8000;
14536 break;
14537
14538 case R_PPC64_ADDR16_DS:
14539 case R_PPC64_ADDR16_LO_DS:
14540 case R_PPC64_GOT16_DS:
14541 case R_PPC64_GOT16_LO_DS:
14542 case R_PPC64_PLT16_LO_DS:
14543 case R_PPC64_SECTOFF_DS:
14544 case R_PPC64_SECTOFF_LO_DS:
14545 case R_PPC64_TOC16_DS:
14546 case R_PPC64_TOC16_LO_DS:
14547 case R_PPC64_PLTGOT16_DS:
14548 case R_PPC64_PLTGOT16_LO_DS:
14549 case R_PPC64_GOT_TPREL16_DS:
14550 case R_PPC64_GOT_TPREL16_LO_DS:
14551 case R_PPC64_GOT_DTPREL16_DS:
14552 case R_PPC64_GOT_DTPREL16_LO_DS:
14553 case R_PPC64_TPREL16_DS:
14554 case R_PPC64_TPREL16_LO_DS:
14555 case R_PPC64_DTPREL16_DS:
14556 case R_PPC64_DTPREL16_LO_DS:
14557 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14558 mask = 3;
14559 /* If this reloc is against an lq insn, then the value must be
14560 a multiple of 16. This is somewhat of a hack, but the
14561 "correct" way to do this by defining _DQ forms of all the
14562 _DS relocs bloats all reloc switches in this file. It
14563 doesn't seem to make much sense to use any of these relocs
14564 in data, so testing the insn should be safe. */
14565 if ((insn & (0x3f << 26)) == (56u << 26))
14566 mask = 15;
14567 if (((relocation + addend) & mask) != 0)
14568 {
14569 info->callbacks->einfo
14570 (_("%P: %H: error: %s not a multiple of %u\n"),
14571 input_bfd, input_section, rel->r_offset,
14572 ppc64_elf_howto_table[r_type]->name,
14573 mask + 1);
14574 bfd_set_error (bfd_error_bad_value);
14575 ret = FALSE;
14576 continue;
14577 }
14578 break;
14579 }
14580
14581 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14582 because such sections are not SEC_ALLOC and thus ld.so will
14583 not process them. */
14584 if (unresolved_reloc
14585 && !((input_section->flags & SEC_DEBUGGING) != 0
14586 && h->elf.def_dynamic)
14587 && _bfd_elf_section_offset (output_bfd, info, input_section,
14588 rel->r_offset) != (bfd_vma) -1)
14589 {
14590 info->callbacks->einfo
14591 (_("%P: %H: unresolvable %s against `%T'\n"),
14592 input_bfd, input_section, rel->r_offset,
14593 ppc64_elf_howto_table[(int) r_type]->name,
14594 h->elf.root.root.string);
14595 ret = FALSE;
14596 }
14597
14598 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
14599 input_bfd,
14600 input_section,
14601 contents,
14602 rel->r_offset,
14603 relocation,
14604 addend);
14605
14606 if (r != bfd_reloc_ok)
14607 {
14608 char *more_info = NULL;
14609 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
14610
14611 if (reloc_dest != DEST_NORMAL)
14612 {
14613 more_info = bfd_malloc (strlen (reloc_name) + 8);
14614 if (more_info != NULL)
14615 {
14616 strcpy (more_info, reloc_name);
14617 strcat (more_info, (reloc_dest == DEST_OPD
14618 ? " (OPD)" : " (stub)"));
14619 reloc_name = more_info;
14620 }
14621 }
14622
14623 if (r == bfd_reloc_overflow)
14624 {
14625 if (warned)
14626 continue;
14627 if (h != NULL
14628 && h->elf.root.type == bfd_link_hash_undefweak
14629 && ppc64_elf_howto_table[r_type]->pc_relative)
14630 {
14631 /* Assume this is a call protected by other code that
14632 detects the symbol is undefined. If this is the case,
14633 we can safely ignore the overflow. If not, the
14634 program is hosed anyway, and a little warning isn't
14635 going to help. */
14636
14637 continue;
14638 }
14639
14640 if (!((*info->callbacks->reloc_overflow)
14641 (info, &h->elf.root, sym_name,
14642 reloc_name, orig_rel.r_addend,
14643 input_bfd, input_section, rel->r_offset)))
14644 return FALSE;
14645 }
14646 else
14647 {
14648 info->callbacks->einfo
14649 (_("%P: %H: %s against `%T': error %d\n"),
14650 input_bfd, input_section, rel->r_offset,
14651 reloc_name, sym_name, (int) r);
14652 ret = FALSE;
14653 }
14654 if (more_info != NULL)
14655 free (more_info);
14656 }
14657 }
14658
14659 /* If we're emitting relocations, then shortly after this function
14660 returns, reloc offsets and addends for this section will be
14661 adjusted. Worse, reloc symbol indices will be for the output
14662 file rather than the input. Save a copy of the relocs for
14663 opd_entry_value. */
14664 if (is_opd && (info->emitrelocations || info->relocatable))
14665 {
14666 bfd_size_type amt;
14667 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14668 rel = bfd_alloc (input_bfd, amt);
14669 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14670 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14671 if (rel == NULL)
14672 return FALSE;
14673 memcpy (rel, relocs, amt);
14674 }
14675 return ret;
14676 }
14677
14678 /* Adjust the value of any local symbols in opd sections. */
14679
14680 static int
14681 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14682 const char *name ATTRIBUTE_UNUSED,
14683 Elf_Internal_Sym *elfsym,
14684 asection *input_sec,
14685 struct elf_link_hash_entry *h)
14686 {
14687 struct _opd_sec_data *opd;
14688 long adjust;
14689 bfd_vma value;
14690
14691 if (h != NULL)
14692 return 1;
14693
14694 opd = get_opd_info (input_sec);
14695 if (opd == NULL || opd->adjust == NULL)
14696 return 1;
14697
14698 value = elfsym->st_value - input_sec->output_offset;
14699 if (!info->relocatable)
14700 value -= input_sec->output_section->vma;
14701
14702 adjust = opd->adjust[value / 8];
14703 if (adjust == -1)
14704 return 2;
14705
14706 elfsym->st_value += adjust;
14707 return 1;
14708 }
14709
14710 /* Finish up dynamic symbol handling. We set the contents of various
14711 dynamic sections here. */
14712
14713 static bfd_boolean
14714 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14715 struct bfd_link_info *info,
14716 struct elf_link_hash_entry *h,
14717 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14718 {
14719 struct ppc_link_hash_table *htab;
14720 struct plt_entry *ent;
14721 Elf_Internal_Rela rela;
14722 bfd_byte *loc;
14723
14724 htab = ppc_hash_table (info);
14725 if (htab == NULL)
14726 return FALSE;
14727
14728 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14729 if (ent->plt.offset != (bfd_vma) -1)
14730 {
14731 /* This symbol has an entry in the procedure linkage
14732 table. Set it up. */
14733 if (!htab->elf.dynamic_sections_created
14734 || h->dynindx == -1)
14735 {
14736 BFD_ASSERT (h->type == STT_GNU_IFUNC
14737 && h->def_regular
14738 && (h->root.type == bfd_link_hash_defined
14739 || h->root.type == bfd_link_hash_defweak));
14740 rela.r_offset = (htab->elf.iplt->output_section->vma
14741 + htab->elf.iplt->output_offset
14742 + ent->plt.offset);
14743 if (htab->opd_abi)
14744 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14745 else
14746 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14747 rela.r_addend = (h->root.u.def.value
14748 + h->root.u.def.section->output_offset
14749 + h->root.u.def.section->output_section->vma
14750 + ent->addend);
14751 loc = (htab->elf.irelplt->contents
14752 + (htab->elf.irelplt->reloc_count++
14753 * sizeof (Elf64_External_Rela)));
14754 }
14755 else
14756 {
14757 rela.r_offset = (htab->elf.splt->output_section->vma
14758 + htab->elf.splt->output_offset
14759 + ent->plt.offset);
14760 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14761 rela.r_addend = ent->addend;
14762 loc = (htab->elf.srelplt->contents
14763 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14764 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14765 }
14766 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14767
14768 if (!htab->opd_abi)
14769 {
14770 if (!h->def_regular)
14771 {
14772 /* Mark the symbol as undefined, rather than as
14773 defined in glink. Leave the value if there were
14774 any relocations where pointer equality matters
14775 (this is a clue for the dynamic linker, to make
14776 function pointer comparisons work between an
14777 application and shared library), otherwise set it
14778 to zero. */
14779 sym->st_shndx = SHN_UNDEF;
14780 if (!h->pointer_equality_needed)
14781 sym->st_value = 0;
14782 else if (!h->ref_regular_nonweak)
14783 {
14784 /* This breaks function pointer comparisons, but
14785 that is better than breaking tests for a NULL
14786 function pointer. */
14787 sym->st_value = 0;
14788 }
14789 }
14790 }
14791 }
14792
14793 if (h->needs_copy)
14794 {
14795 /* This symbol needs a copy reloc. Set it up. */
14796
14797 if (h->dynindx == -1
14798 || (h->root.type != bfd_link_hash_defined
14799 && h->root.type != bfd_link_hash_defweak)
14800 || htab->relbss == NULL)
14801 abort ();
14802
14803 rela.r_offset = (h->root.u.def.value
14804 + h->root.u.def.section->output_section->vma
14805 + h->root.u.def.section->output_offset);
14806 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14807 rela.r_addend = 0;
14808 loc = htab->relbss->contents;
14809 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14810 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14811 }
14812
14813 return TRUE;
14814 }
14815
14816 /* Used to decide how to sort relocs in an optimal manner for the
14817 dynamic linker, before writing them out. */
14818
14819 static enum elf_reloc_type_class
14820 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14821 const asection *rel_sec,
14822 const Elf_Internal_Rela *rela)
14823 {
14824 enum elf_ppc64_reloc_type r_type;
14825 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14826
14827 if (rel_sec == htab->elf.irelplt)
14828 return reloc_class_ifunc;
14829
14830 r_type = ELF64_R_TYPE (rela->r_info);
14831 switch (r_type)
14832 {
14833 case R_PPC64_RELATIVE:
14834 return reloc_class_relative;
14835 case R_PPC64_JMP_SLOT:
14836 return reloc_class_plt;
14837 case R_PPC64_COPY:
14838 return reloc_class_copy;
14839 default:
14840 return reloc_class_normal;
14841 }
14842 }
14843
14844 /* Finish up the dynamic sections. */
14845
14846 static bfd_boolean
14847 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14848 struct bfd_link_info *info)
14849 {
14850 struct ppc_link_hash_table *htab;
14851 bfd *dynobj;
14852 asection *sdyn;
14853
14854 htab = ppc_hash_table (info);
14855 if (htab == NULL)
14856 return FALSE;
14857
14858 dynobj = htab->elf.dynobj;
14859 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14860
14861 if (htab->elf.dynamic_sections_created)
14862 {
14863 Elf64_External_Dyn *dyncon, *dynconend;
14864
14865 if (sdyn == NULL || htab->elf.sgot == NULL)
14866 abort ();
14867
14868 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14869 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14870 for (; dyncon < dynconend; dyncon++)
14871 {
14872 Elf_Internal_Dyn dyn;
14873 asection *s;
14874
14875 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14876
14877 switch (dyn.d_tag)
14878 {
14879 default:
14880 continue;
14881
14882 case DT_PPC64_GLINK:
14883 s = htab->glink;
14884 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14885 /* We stupidly defined DT_PPC64_GLINK to be the start
14886 of glink rather than the first entry point, which is
14887 what ld.so needs, and now have a bigger stub to
14888 support automatic multiple TOCs. */
14889 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
14890 break;
14891
14892 case DT_PPC64_OPD:
14893 s = bfd_get_section_by_name (output_bfd, ".opd");
14894 if (s == NULL)
14895 continue;
14896 dyn.d_un.d_ptr = s->vma;
14897 break;
14898
14899 case DT_PPC64_OPT:
14900 if (htab->do_multi_toc && htab->multi_toc_needed)
14901 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
14902 break;
14903
14904 case DT_PPC64_OPDSZ:
14905 s = bfd_get_section_by_name (output_bfd, ".opd");
14906 if (s == NULL)
14907 continue;
14908 dyn.d_un.d_val = s->size;
14909 break;
14910
14911 case DT_PLTGOT:
14912 s = htab->elf.splt;
14913 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14914 break;
14915
14916 case DT_JMPREL:
14917 s = htab->elf.srelplt;
14918 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14919 break;
14920
14921 case DT_PLTRELSZ:
14922 dyn.d_un.d_val = htab->elf.srelplt->size;
14923 break;
14924
14925 case DT_RELASZ:
14926 /* Don't count procedure linkage table relocs in the
14927 overall reloc count. */
14928 s = htab->elf.srelplt;
14929 if (s == NULL)
14930 continue;
14931 dyn.d_un.d_val -= s->size;
14932 break;
14933
14934 case DT_RELA:
14935 /* We may not be using the standard ELF linker script.
14936 If .rela.plt is the first .rela section, we adjust
14937 DT_RELA to not include it. */
14938 s = htab->elf.srelplt;
14939 if (s == NULL)
14940 continue;
14941 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14942 continue;
14943 dyn.d_un.d_ptr += s->size;
14944 break;
14945 }
14946
14947 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14948 }
14949 }
14950
14951 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
14952 {
14953 /* Fill in the first entry in the global offset table.
14954 We use it to hold the link-time TOCbase. */
14955 bfd_put_64 (output_bfd,
14956 elf_gp (output_bfd) + TOC_BASE_OFF,
14957 htab->elf.sgot->contents);
14958
14959 /* Set .got entry size. */
14960 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
14961 }
14962
14963 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
14964 {
14965 /* Set .plt entry size. */
14966 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
14967 = PLT_ENTRY_SIZE (htab);
14968 }
14969
14970 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14971 brlt ourselves if emitrelocations. */
14972 if (htab->brlt != NULL
14973 && htab->brlt->reloc_count != 0
14974 && !_bfd_elf_link_output_relocs (output_bfd,
14975 htab->brlt,
14976 elf_section_data (htab->brlt)->rela.hdr,
14977 elf_section_data (htab->brlt)->relocs,
14978 NULL))
14979 return FALSE;
14980
14981 if (htab->glink != NULL
14982 && htab->glink->reloc_count != 0
14983 && !_bfd_elf_link_output_relocs (output_bfd,
14984 htab->glink,
14985 elf_section_data (htab->glink)->rela.hdr,
14986 elf_section_data (htab->glink)->relocs,
14987 NULL))
14988 return FALSE;
14989
14990
14991 if (htab->glink_eh_frame != NULL
14992 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14993 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14994 htab->glink_eh_frame,
14995 htab->glink_eh_frame->contents))
14996 return FALSE;
14997
14998 /* We need to handle writing out multiple GOT sections ourselves,
14999 since we didn't add them to DYNOBJ. We know dynobj is the first
15000 bfd. */
15001 while ((dynobj = dynobj->link_next) != NULL)
15002 {
15003 asection *s;
15004
15005 if (!is_ppc64_elf (dynobj))
15006 continue;
15007
15008 s = ppc64_elf_tdata (dynobj)->got;
15009 if (s != NULL
15010 && s->size != 0
15011 && s->output_section != bfd_abs_section_ptr
15012 && !bfd_set_section_contents (output_bfd, s->output_section,
15013 s->contents, s->output_offset,
15014 s->size))
15015 return FALSE;
15016 s = ppc64_elf_tdata (dynobj)->relgot;
15017 if (s != NULL
15018 && s->size != 0
15019 && s->output_section != bfd_abs_section_ptr
15020 && !bfd_set_section_contents (output_bfd, s->output_section,
15021 s->contents, s->output_offset,
15022 s->size))
15023 return FALSE;
15024 }
15025
15026 return TRUE;
15027 }
15028
15029 #include "elf64-target.h"
15030
15031 /* FreeBSD support */
15032
15033 #undef TARGET_LITTLE_SYM
15034 #undef TARGET_LITTLE_NAME
15035
15036 #undef TARGET_BIG_SYM
15037 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
15038 #undef TARGET_BIG_NAME
15039 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15040
15041 #undef ELF_OSABI
15042 #define ELF_OSABI ELFOSABI_FREEBSD
15043
15044 #undef elf64_bed
15045 #define elf64_bed elf64_powerpc_fbsd_bed
15046
15047 #include "elf64-target.h"
15048
GDB Binutils - Deliverables
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