elflink.c whitespace, formatting and a plugin symbol tweak
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
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1/* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2015 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24/* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28#include "sysdep.h"
29#include <stdarg.h>
30#include "bfd.h"
31#include "bfdlink.h"
32#include "libbfd.h"
33#include "elf-bfd.h"
34#include "elf/ppc64.h"
35#include "elf64-ppc.h"
36#include "dwarf2.h"
37
38static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59#define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60#define TARGET_LITTLE_NAME "elf64-powerpcle"
61#define TARGET_BIG_SYM powerpc_elf64_vec
62#define TARGET_BIG_NAME "elf64-powerpc"
63#define ELF_ARCH bfd_arch_powerpc
64#define ELF_TARGET_ID PPC64_ELF_DATA
65#define ELF_MACHINE_CODE EM_PPC64
66#define ELF_MAXPAGESIZE 0x10000
67#define ELF_COMMONPAGESIZE 0x10000
68#define elf_info_to_howto ppc64_elf_info_to_howto
69
70#define elf_backend_want_got_sym 0
71#define elf_backend_want_plt_sym 0
72#define elf_backend_plt_alignment 3
73#define elf_backend_plt_not_loaded 1
74#define elf_backend_got_header_size 8
75#define elf_backend_can_gc_sections 1
76#define elf_backend_can_refcount 1
77#define elf_backend_rela_normal 1
78#define elf_backend_default_execstack 0
79
80#define bfd_elf64_mkobject ppc64_elf_mkobject
81#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84#define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
85#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90#define elf_backend_object_p ppc64_elf_object_p
91#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93#define elf_backend_write_core_note ppc64_elf_write_core_note
94#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97#define elf_backend_check_directives ppc64_elf_before_check_relocs
98#define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
99#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100#define elf_backend_check_relocs ppc64_elf_check_relocs
101#define elf_backend_gc_keep ppc64_elf_gc_keep
102#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106#define elf_backend_hide_symbol ppc64_elf_hide_symbol
107#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
108#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110#define elf_backend_hash_symbol ppc64_elf_hash_symbol
111#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112#define elf_backend_action_discarded ppc64_elf_action_discarded
113#define elf_backend_relocate_section ppc64_elf_relocate_section
114#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118#define elf_backend_special_sections ppc64_elf_special_sections
119#define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
120
121/* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125/* The size in bytes of an entry in the procedure linkage table. */
126#define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
127
128/* The initial size of the plt reserved for the dynamic linker. */
129#define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
130
131/* Offsets to some stack save slots. */
132#define STK_LR 16
133#define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
134/* This one is dodgy. ELFv2 does not have a linker word, so use the
135 CR save slot. Used only by optimised __tls_get_addr call stub,
136 relying on __tls_get_addr_opt not saving CR.. */
137#define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
138
139/* TOC base pointers offset from start of TOC. */
140#define TOC_BASE_OFF 0x8000
141
142/* Offset of tp and dtp pointers from start of TLS block. */
143#define TP_OFFSET 0x7000
144#define DTP_OFFSET 0x8000
145
146/* .plt call stub instructions. The normal stub is like this, but
147 sometimes the .plt entry crosses a 64k boundary and we need to
148 insert an addi to adjust r11. */
149#define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
150#define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
151#define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
152#define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
153#define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
154#define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
155#define BCTR 0x4e800420 /* bctr */
156
157#define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
158#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
159#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
160
161#define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
162#define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
163#define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
164#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
165#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
166#define BNECTR 0x4ca20420 /* bnectr+ */
167#define BNECTR_P4 0x4ce20420 /* bnectr+ */
168
169#define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
170#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
171#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
172
173#define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
174
175#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
176#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
177#define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
178
179/* glink call stub instructions. We enter with the index in R0. */
180#define GLINK_CALL_STUB_SIZE (16*4)
181 /* 0: */
182 /* .quad plt0-1f */
183 /* __glink: */
184#define MFLR_R12 0x7d8802a6 /* mflr %12 */
185#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
186 /* 1: */
187#define MFLR_R11 0x7d6802a6 /* mflr %11 */
188 /* ld %2,(0b-1b)(%11) */
189#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
190#define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
191 /* ld %12,0(%11) */
192 /* ld %2,8(%11) */
193 /* mtctr %12 */
194 /* ld %11,16(%11) */
195 /* bctr */
196#define MFLR_R0 0x7c0802a6 /* mflr %r0 */
197#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
198#define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
199#define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
200#define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
201
202/* Pad with this. */
203#define NOP 0x60000000
204
205/* Some other nops. */
206#define CROR_151515 0x4def7b82
207#define CROR_313131 0x4ffffb82
208
209/* .glink entries for the first 32k functions are two instructions. */
210#define LI_R0_0 0x38000000 /* li %r0,0 */
211#define B_DOT 0x48000000 /* b . */
212
213/* After that, we need two instructions to load the index, followed by
214 a branch. */
215#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
216#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
217
218/* Instructions used by the save and restore reg functions. */
219#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
220#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
221#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
222#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
223#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
224#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
225#define LI_R12_0 0x39800000 /* li %r12,0 */
226#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
227#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
228#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
229#define BLR 0x4e800020 /* blr */
230
231/* Since .opd is an array of descriptors and each entry will end up
232 with identical R_PPC64_RELATIVE relocs, there is really no need to
233 propagate .opd relocs; The dynamic linker should be taught to
234 relocate .opd without reloc entries. */
235#ifndef NO_OPD_RELOCS
236#define NO_OPD_RELOCS 0
237#endif
238
239static inline int
240abiversion (bfd *abfd)
241{
242 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
243}
244
245static inline void
246set_abiversion (bfd *abfd, int ver)
247{
248 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
249 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
250}
251\f
252#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
253
254/* Relocation HOWTO's. */
255static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
256
257static reloc_howto_type ppc64_elf_howto_raw[] = {
258 /* This reloc does nothing. */
259 HOWTO (R_PPC64_NONE, /* type */
260 0, /* rightshift */
261 3, /* size (0 = byte, 1 = short, 2 = long) */
262 0, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_dont, /* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_PPC64_NONE", /* name */
268 FALSE, /* partial_inplace */
269 0, /* src_mask */
270 0, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 /* A standard 32 bit relocation. */
274 HOWTO (R_PPC64_ADDR32, /* type */
275 0, /* rightshift */
276 2, /* size (0 = byte, 1 = short, 2 = long) */
277 32, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_bitfield, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_ADDR32", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0xffffffff, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* An absolute 26 bit branch; the lower two bits must be zero.
289 FIXME: we don't check that, we just clear them. */
290 HOWTO (R_PPC64_ADDR24, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 26, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC64_ADDR24", /* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0x03fffffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* A standard 16 bit relocation. */
305 HOWTO (R_PPC64_ADDR16, /* type */
306 0, /* rightshift */
307 1, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR16", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xffff, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A 16 bit relocation without overflow. */
320 HOWTO (R_PPC64_ADDR16_LO, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_dont,/* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16_LO", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* Bits 16-31 of an address. */
335 HOWTO (R_PPC64_ADDR16_HI, /* type */
336 16, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_HI", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
350 bits, treated as a signed number, is negative. */
351 HOWTO (R_PPC64_ADDR16_HA, /* type */
352 16, /* rightshift */
353 1, /* size (0 = byte, 1 = short, 2 = long) */
354 16, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_signed, /* complain_on_overflow */
358 ppc64_elf_ha_reloc, /* special_function */
359 "R_PPC64_ADDR16_HA", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* An absolute 16 bit branch; the lower two bits must be zero.
366 FIXME: we don't check that, we just clear them. */
367 HOWTO (R_PPC64_ADDR14, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 16, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_signed, /* complain_on_overflow */
374 ppc64_elf_branch_reloc, /* special_function */
375 "R_PPC64_ADDR14", /* name */
376 FALSE, /* partial_inplace */
377 0, /* src_mask */
378 0x0000fffc, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 /* An absolute 16 bit branch, for which bit 10 should be set to
382 indicate that the branch is expected to be taken. The lower two
383 bits must be zero. */
384 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_brtaken_reloc, /* special_function */
392 "R_PPC64_ADDR14_BRTAKEN",/* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* An absolute 16 bit branch, for which bit 10 should be set to
399 indicate that the branch is not expected to be taken. The lower
400 two bits must be zero. */
401 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_ADDR14_BRNTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* A relative 26 bit branch; the lower two bits must be zero. */
416 HOWTO (R_PPC64_REL24, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 26, /* bitsize */
420 TRUE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_branch_reloc, /* special_function */
424 "R_PPC64_REL24", /* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x03fffffc, /* dst_mask */
428 TRUE), /* pcrel_offset */
429
430 /* A relative 16 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL14, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL14", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x0000fffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch. Bit 10 should be set to indicate that
446 the branch is expected to be taken. The lower two bits must be
447 zero. */
448 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
449 0, /* rightshift */
450 2, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 TRUE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_signed, /* complain_on_overflow */
455 ppc64_elf_brtaken_reloc, /* special_function */
456 "R_PPC64_REL14_BRTAKEN", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0x0000fffc, /* dst_mask */
460 TRUE), /* pcrel_offset */
461
462 /* A relative 16 bit branch. Bit 10 should be set to indicate that
463 the branch is not expected to be taken. The lower two bits must
464 be zero. */
465 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 ppc64_elf_brtaken_reloc, /* special_function */
473 "R_PPC64_REL14_BRNTAKEN",/* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x0000fffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
480 symbol. */
481 HOWTO (R_PPC64_GOT16, /* type */
482 0, /* rightshift */
483 1, /* size (0 = byte, 1 = short, 2 = long) */
484 16, /* bitsize */
485 FALSE, /* pc_relative */
486 0, /* bitpos */
487 complain_overflow_signed, /* complain_on_overflow */
488 ppc64_elf_unhandled_reloc, /* special_function */
489 "R_PPC64_GOT16", /* name */
490 FALSE, /* partial_inplace */
491 0, /* src_mask */
492 0xffff, /* dst_mask */
493 FALSE), /* pcrel_offset */
494
495 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
496 the symbol. */
497 HOWTO (R_PPC64_GOT16_LO, /* type */
498 0, /* rightshift */
499 1, /* size (0 = byte, 1 = short, 2 = long) */
500 16, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont, /* complain_on_overflow */
504 ppc64_elf_unhandled_reloc, /* special_function */
505 "R_PPC64_GOT16_LO", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
512 the symbol. */
513 HOWTO (R_PPC64_GOT16_HI, /* type */
514 16, /* rightshift */
515 1, /* size (0 = byte, 1 = short, 2 = long) */
516 16, /* bitsize */
517 FALSE, /* pc_relative */
518 0, /* bitpos */
519 complain_overflow_signed,/* complain_on_overflow */
520 ppc64_elf_unhandled_reloc, /* special_function */
521 "R_PPC64_GOT16_HI", /* name */
522 FALSE, /* partial_inplace */
523 0, /* src_mask */
524 0xffff, /* dst_mask */
525 FALSE), /* pcrel_offset */
526
527 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
528 the symbol. */
529 HOWTO (R_PPC64_GOT16_HA, /* type */
530 16, /* rightshift */
531 1, /* size (0 = byte, 1 = short, 2 = long) */
532 16, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_signed,/* complain_on_overflow */
536 ppc64_elf_unhandled_reloc, /* special_function */
537 "R_PPC64_GOT16_HA", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0xffff, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* This is used only by the dynamic linker. The symbol should exist
544 both in the object being run and in some shared library. The
545 dynamic linker copies the data addressed by the symbol from the
546 shared library into the object, because the object being
547 run has to have the data at some particular address. */
548 HOWTO (R_PPC64_COPY, /* type */
549 0, /* rightshift */
550 0, /* this one is variable size */
551 0, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_dont, /* complain_on_overflow */
555 ppc64_elf_unhandled_reloc, /* special_function */
556 "R_PPC64_COPY", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC64_ADDR64, but used when setting global offset table
563 entries. */
564 HOWTO (R_PPC64_GLOB_DAT, /* type */
565 0, /* rightshift */
566 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
567 64, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_dont, /* complain_on_overflow */
571 ppc64_elf_unhandled_reloc, /* special_function */
572 "R_PPC64_GLOB_DAT", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 ONES (64), /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* Created by the link editor. Marks a procedure linkage table
579 entry for a symbol. */
580 HOWTO (R_PPC64_JMP_SLOT, /* type */
581 0, /* rightshift */
582 0, /* size (0 = byte, 1 = short, 2 = long) */
583 0, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 ppc64_elf_unhandled_reloc, /* special_function */
588 "R_PPC64_JMP_SLOT", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* Used only by the dynamic linker. When the object is run, this
595 doubleword64 is set to the load address of the object, plus the
596 addend. */
597 HOWTO (R_PPC64_RELATIVE, /* type */
598 0, /* rightshift */
599 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
600 64, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_dont, /* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_PPC64_RELATIVE", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 ONES (64), /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* Like R_PPC64_ADDR32, but may be unaligned. */
612 HOWTO (R_PPC64_UADDR32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_UADDR32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0xffffffff, /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR16, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR16, /* type */
628 0, /* rightshift */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
630 16, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR16", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* 32-bit PC relative. */
642 HOWTO (R_PPC64_REL32, /* type */
643 0, /* rightshift */
644 2, /* size (0 = byte, 1 = short, 2 = long) */
645 32, /* bitsize */
646 TRUE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_signed, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_REL32", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffffffff, /* dst_mask */
654 TRUE), /* pcrel_offset */
655
656 /* 32-bit relocation to the symbol's procedure linkage table. */
657 HOWTO (R_PPC64_PLT32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_bitfield, /* complain_on_overflow */
664 ppc64_elf_unhandled_reloc, /* special_function */
665 "R_PPC64_PLT32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 FALSE), /* pcrel_offset */
670
671 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
672 FIXME: R_PPC64_PLTREL32 not supported. */
673 HOWTO (R_PPC64_PLTREL32, /* type */
674 0, /* rightshift */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
676 32, /* bitsize */
677 TRUE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_signed, /* complain_on_overflow */
680 bfd_elf_generic_reloc, /* special_function */
681 "R_PPC64_PLTREL32", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0xffffffff, /* dst_mask */
685 TRUE), /* pcrel_offset */
686
687 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
688 the symbol. */
689 HOWTO (R_PPC64_PLT16_LO, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont, /* complain_on_overflow */
696 ppc64_elf_unhandled_reloc, /* special_function */
697 "R_PPC64_PLT16_LO", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
704 the symbol. */
705 HOWTO (R_PPC64_PLT16_HI, /* type */
706 16, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_signed, /* complain_on_overflow */
712 ppc64_elf_unhandled_reloc, /* special_function */
713 "R_PPC64_PLT16_HI", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
720 the symbol. */
721 HOWTO (R_PPC64_PLT16_HA, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 ppc64_elf_unhandled_reloc, /* special_function */
729 "R_PPC64_PLT16_HA", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit section relative relocation. */
736 HOWTO (R_PPC64_SECTOFF, /* type */
737 0, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_sectoff_reloc, /* special_function */
744 "R_PPC64_SECTOFF", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Like R_PPC64_SECTOFF, but no overflow warning. */
751 HOWTO (R_PPC64_SECTOFF_LO, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF_LO", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 16-bit upper half section relative relocation. */
766 HOWTO (R_PPC64_SECTOFF_HI, /* type */
767 16, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_signed, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_HI", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half adjusted section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HA, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_ha_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HA", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* Like R_PPC64_REL24 without touching the two least significant bits. */
796 HOWTO (R_PPC64_REL30, /* type */
797 2, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 30, /* bitsize */
800 TRUE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 "R_PPC64_REL30", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xfffffffc, /* dst_mask */
808 TRUE), /* pcrel_offset */
809
810 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
811
812 /* A standard 64-bit relocation. */
813 HOWTO (R_PPC64_ADDR64, /* type */
814 0, /* rightshift */
815 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
816 64, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_ADDR64", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 ONES (64), /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* The bits 32-47 of an address. */
828 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
829 32, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR16_HIGHER", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address, plus 1 if the contents of the low
843 16 bits, treated as a signed number, is negative. */
844 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
845 32, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc64_elf_ha_reloc, /* special_function */
852 "R_PPC64_ADDR16_HIGHERA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* The bits 48-63 of an address. */
859 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
860 48, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHEST", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address, plus 1 if the contents of the low
874 16 bits, treated as a signed number, is negative. */
875 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
876 48, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_dont, /* complain_on_overflow */
882 ppc64_elf_ha_reloc, /* special_function */
883 "R_PPC64_ADDR16_HIGHESTA", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like ADDR64, but may be unaligned. */
890 HOWTO (R_PPC64_UADDR64, /* type */
891 0, /* rightshift */
892 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
893 64, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_PPC64_UADDR64", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 ONES (64), /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* 64-bit relative relocation. */
905 HOWTO (R_PPC64_REL64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 TRUE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_REL64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 TRUE), /* pcrel_offset */
918
919 /* 64-bit relocation to the symbol's procedure linkage table. */
920 HOWTO (R_PPC64_PLT64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc64_elf_unhandled_reloc, /* special_function */
928 "R_PPC64_PLT64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* 64-bit PC relative relocation to the symbol's procedure linkage
935 table. */
936 /* FIXME: R_PPC64_PLTREL64 not supported. */
937 HOWTO (R_PPC64_PLTREL64, /* type */
938 0, /* rightshift */
939 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
940 64, /* bitsize */
941 TRUE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_unhandled_reloc, /* special_function */
945 "R_PPC64_PLTREL64", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 ONES (64), /* dst_mask */
949 TRUE), /* pcrel_offset */
950
951 /* 16 bit TOC-relative relocation. */
952
953 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
954 HOWTO (R_PPC64_TOC16, /* type */
955 0, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_signed, /* complain_on_overflow */
961 ppc64_elf_toc_reloc, /* special_function */
962 "R_PPC64_TOC16", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 16 bit TOC-relative relocation without overflow. */
969
970 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_LO, /* type */
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_reloc, /* special_function */
979 "R_PPC64_TOC16_LO", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 16 bit TOC-relative relocation, high 16 bits. */
986
987 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
988 HOWTO (R_PPC64_TOC16_HI, /* type */
989 16, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc64_elf_toc_reloc, /* special_function */
996 "R_PPC64_TOC16_HI", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1003 contents of the low 16 bits, treated as a signed number, is
1004 negative. */
1005
1006 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1007 HOWTO (R_PPC64_TOC16_HA, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_toc_ha_reloc, /* special_function */
1015 "R_PPC64_TOC16_HA", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1022
1023 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1024 HOWTO (R_PPC64_TOC, /* type */
1025 0, /* rightshift */
1026 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1027 64, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_toc64_reloc, /* special_function */
1032 "R_PPC64_TOC", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 ONES (64), /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_GOT16, but also informs the link editor that the
1039 value to relocate may (!) refer to a PLT entry which the link
1040 editor (a) may replace with the symbol value. If the link editor
1041 is unable to fully resolve the symbol, it may (b) create a PLT
1042 entry and store the address to the new PLT entry in the GOT.
1043 This permits lazy resolution of function symbols at run time.
1044 The link editor may also skip all of this and just (c) emit a
1045 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1046 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1047 HOWTO (R_PPC64_PLTGOT16, /* type */
1048 0, /* rightshift */
1049 1, /* size (0 = byte, 1 = short, 2 = long) */
1050 16, /* bitsize */
1051 FALSE, /* pc_relative */
1052 0, /* bitpos */
1053 complain_overflow_signed, /* complain_on_overflow */
1054 ppc64_elf_unhandled_reloc, /* special_function */
1055 "R_PPC64_PLTGOT16", /* name */
1056 FALSE, /* partial_inplace */
1057 0, /* src_mask */
1058 0xffff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1060
1061 /* Like R_PPC64_PLTGOT16, but without overflow. */
1062 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1063 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1064 0, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc64_elf_unhandled_reloc, /* special_function */
1071 "R_PPC64_PLTGOT16_LO", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1078 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1079 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_signed, /* complain_on_overflow */
1086 ppc64_elf_unhandled_reloc, /* special_function */
1087 "R_PPC64_PLTGOT16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1094 1 if the contents of the low 16 bits, treated as a signed number,
1095 is negative. */
1096 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1097 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1098 16, /* rightshift */
1099 1, /* size (0 = byte, 1 = short, 2 = long) */
1100 16, /* bitsize */
1101 FALSE, /* pc_relative */
1102 0, /* bitpos */
1103 complain_overflow_signed, /* complain_on_overflow */
1104 ppc64_elf_unhandled_reloc, /* special_function */
1105 "R_PPC64_PLTGOT16_HA", /* name */
1106 FALSE, /* partial_inplace */
1107 0, /* src_mask */
1108 0xffff, /* dst_mask */
1109 FALSE), /* pcrel_offset */
1110
1111 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1112 HOWTO (R_PPC64_ADDR16_DS, /* type */
1113 0, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 bfd_elf_generic_reloc, /* special_function */
1120 "R_PPC64_ADDR16_DS", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xfffc, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_dont,/* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_LO_DS",/* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_GOT16_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_signed, /* complain_on_overflow */
1149 ppc64_elf_unhandled_reloc, /* special_function */
1150 "R_PPC64_GOT16_DS", /* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_LO_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_PLT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_signed, /* complain_on_overflow */
1194 ppc64_elf_sectoff_reloc, /* special_function */
1195 "R_PPC64_SECTOFF_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_LO_DS",/* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_TOC16_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_signed, /* complain_on_overflow */
1224 ppc64_elf_toc_reloc, /* special_function */
1225 "R_PPC64_TOC16_DS", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_dont, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_LO_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1247 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1248 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_signed, /* complain_on_overflow */
1255 ppc64_elf_unhandled_reloc, /* special_function */
1256 "R_PPC64_PLTGOT16_DS", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xfffc, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1263 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1264 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont, /* complain_on_overflow */
1271 ppc64_elf_unhandled_reloc, /* special_function */
1272 "R_PPC64_PLTGOT16_LO_DS",/* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xfffc, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* Marker relocs for TLS. */
1279 HOWTO (R_PPC64_TLS,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLS", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TLSGD,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TLSGD", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 HOWTO (R_PPC64_TLSLD,
1308 0, /* rightshift */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 32, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1315 "R_PPC64_TLSLD", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 HOWTO (R_PPC64_TOCSAVE,
1322 0, /* rightshift */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 32, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 bfd_elf_generic_reloc, /* special_function */
1329 "R_PPC64_TOCSAVE", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 /* Computes the load module index of the load module that contains the
1336 definition of its TLS sym. */
1337 HOWTO (R_PPC64_DTPMOD64,
1338 0, /* rightshift */
1339 4, /* size (0 = byte, 1 = short, 2 = long) */
1340 64, /* bitsize */
1341 FALSE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_dont, /* complain_on_overflow */
1344 ppc64_elf_unhandled_reloc, /* special_function */
1345 "R_PPC64_DTPMOD64", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 ONES (64), /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* Computes a dtv-relative displacement, the difference between the value
1352 of sym+add and the base address of the thread-local storage block that
1353 contains the definition of sym, minus 0x8000. */
1354 HOWTO (R_PPC64_DTPREL64,
1355 0, /* rightshift */
1356 4, /* size (0 = byte, 1 = short, 2 = long) */
1357 64, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPREL64", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 ONES (64), /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* A 16 bit dtprel reloc. */
1369 HOWTO (R_PPC64_DTPREL16,
1370 0, /* rightshift */
1371 1, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_signed, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL16", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Like DTPREL16, but no overflow. */
1384 HOWTO (R_PPC64_DTPREL16_LO,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_dont, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16_LO", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1399 HOWTO (R_PPC64_DTPREL16_HI,
1400 16, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_signed, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_HI", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HA,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HA", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HIGHER,
1430 32, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_dont, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HIGHER", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHERA", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1460 48, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHEST", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16, but for insns with a DS field. */
1489 HOWTO (R_PPC64_DTPREL16_DS,
1490 0, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_signed, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_DS", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xfffc, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16_DS, but no overflow. */
1504 HOWTO (R_PPC64_DTPREL16_LO_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_dont, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_LO_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Computes a tp-relative displacement, the difference between the value of
1519 sym+add and the value of the thread pointer (r13). */
1520 HOWTO (R_PPC64_TPREL64,
1521 0, /* rightshift */
1522 4, /* size (0 = byte, 1 = short, 2 = long) */
1523 64, /* bitsize */
1524 FALSE, /* pc_relative */
1525 0, /* bitpos */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 ppc64_elf_unhandled_reloc, /* special_function */
1528 "R_PPC64_TPREL64", /* name */
1529 FALSE, /* partial_inplace */
1530 0, /* src_mask */
1531 ONES (64), /* dst_mask */
1532 FALSE), /* pcrel_offset */
1533
1534 /* A 16 bit tprel reloc. */
1535 HOWTO (R_PPC64_TPREL16,
1536 0, /* rightshift */
1537 1, /* size (0 = byte, 1 = short, 2 = long) */
1538 16, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_signed, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL16", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 0xffff, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* Like TPREL16, but no overflow. */
1550 HOWTO (R_PPC64_TPREL16_LO,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16_LO", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16_LO, but next higher group of 16 bits. */
1565 HOWTO (R_PPC64_TPREL16_HI,
1566 16, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_signed, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_HI", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_HI, but adjust for low 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HA,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HA", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but next higher group of 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HIGHER,
1596 32, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_dont, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HIGHER", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHERA,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHERA", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHEST,
1626 48, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHEST", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHESTA", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16, but for insns with a DS field. */
1655 HOWTO (R_PPC64_TPREL16_DS,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_signed, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_DS", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xfffc, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16_DS, but no overflow. */
1670 HOWTO (R_PPC64_TPREL16_LO_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_LO_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1685 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1686 to the first entry relative to the TOC base (r2). */
1687 HOWTO (R_PPC64_GOT_TLSGD16,
1688 0, /* rightshift */
1689 1, /* size (0 = byte, 1 = short, 2 = long) */
1690 16, /* bitsize */
1691 FALSE, /* pc_relative */
1692 0, /* bitpos */
1693 complain_overflow_signed, /* complain_on_overflow */
1694 ppc64_elf_unhandled_reloc, /* special_function */
1695 "R_PPC64_GOT_TLSGD16", /* name */
1696 FALSE, /* partial_inplace */
1697 0, /* src_mask */
1698 0xffff, /* dst_mask */
1699 FALSE), /* pcrel_offset */
1700
1701 /* Like GOT_TLSGD16, but no overflow. */
1702 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_dont, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16_LO", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1718 16, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_signed, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_HI", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HA", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1747 with values (sym+add)@dtpmod and zero, and computes the offset to the
1748 first entry relative to the TOC base (r2). */
1749 HOWTO (R_PPC64_GOT_TLSLD16,
1750 0, /* rightshift */
1751 1, /* size (0 = byte, 1 = short, 2 = long) */
1752 16, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_signed, /* complain_on_overflow */
1756 ppc64_elf_unhandled_reloc, /* special_function */
1757 "R_PPC64_GOT_TLSLD16", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0xffff, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* Like GOT_TLSLD16, but no overflow. */
1764 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16_LO", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1780 16, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_HI", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HA", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1809 the offset to the entry relative to the TOC base (r2). */
1810 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc64_elf_unhandled_reloc, /* special_function */
1818 "R_PPC64_GOT_DTPREL16_DS", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xfffc, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823
1824 /* Like GOT_DTPREL16_DS, but no overflow. */
1825 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_dont, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1841 16, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_signed, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_HI", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xffff, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HA", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1870 offset to the entry relative to the TOC base (r2). */
1871 HOWTO (R_PPC64_GOT_TPREL16_DS,
1872 0, /* rightshift */
1873 1, /* size (0 = byte, 1 = short, 2 = long) */
1874 16, /* bitsize */
1875 FALSE, /* pc_relative */
1876 0, /* bitpos */
1877 complain_overflow_signed, /* complain_on_overflow */
1878 ppc64_elf_unhandled_reloc, /* special_function */
1879 "R_PPC64_GOT_TPREL16_DS", /* name */
1880 FALSE, /* partial_inplace */
1881 0, /* src_mask */
1882 0xfffc, /* dst_mask */
1883 FALSE), /* pcrel_offset */
1884
1885 /* Like GOT_TPREL16_DS, but no overflow. */
1886 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_dont, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1901 HOWTO (R_PPC64_GOT_TPREL16_HI,
1902 16, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_signed, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_HI", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xffff, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HA,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HA", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 HOWTO (R_PPC64_JMP_IREL, /* type */
1931 0, /* rightshift */
1932 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1933 0, /* bitsize */
1934 FALSE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_dont, /* complain_on_overflow */
1937 ppc64_elf_unhandled_reloc, /* special_function */
1938 "R_PPC64_JMP_IREL", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0, /* dst_mask */
1942 FALSE), /* pcrel_offset */
1943
1944 HOWTO (R_PPC64_IRELATIVE, /* type */
1945 0, /* rightshift */
1946 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1947 64, /* bitsize */
1948 FALSE, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_dont, /* complain_on_overflow */
1951 bfd_elf_generic_reloc, /* special_function */
1952 "R_PPC64_IRELATIVE", /* name */
1953 FALSE, /* partial_inplace */
1954 0, /* src_mask */
1955 ONES (64), /* dst_mask */
1956 FALSE), /* pcrel_offset */
1957
1958 /* A 16 bit relative relocation. */
1959 HOWTO (R_PPC64_REL16, /* type */
1960 0, /* rightshift */
1961 1, /* size (0 = byte, 1 = short, 2 = long) */
1962 16, /* bitsize */
1963 TRUE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_signed, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_REL16", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 0xffff, /* dst_mask */
1971 TRUE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation without overflow. */
1974 HOWTO (R_PPC64_REL16_LO, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_dont,/* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16_LO", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* The high order 16 bits of a relative address. */
1989 HOWTO (R_PPC64_REL16_HI, /* type */
1990 16, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_signed, /* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_HI", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address, plus 1 if the contents of
2004 the low 16 bits, treated as a signed number, is negative. */
2005 HOWTO (R_PPC64_REL16_HA, /* type */
2006 16, /* rightshift */
2007 1, /* size (0 = byte, 1 = short, 2 = long) */
2008 16, /* bitsize */
2009 TRUE, /* pc_relative */
2010 0, /* bitpos */
2011 complain_overflow_signed, /* complain_on_overflow */
2012 ppc64_elf_ha_reloc, /* special_function */
2013 "R_PPC64_REL16_HA", /* name */
2014 FALSE, /* partial_inplace */
2015 0, /* src_mask */
2016 0xffff, /* dst_mask */
2017 TRUE), /* pcrel_offset */
2018
2019 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2020 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 FALSE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_dont, /* complain_on_overflow */
2027 bfd_elf_generic_reloc, /* special_function */
2028 "R_PPC64_ADDR16_HIGH", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 FALSE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2035 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2036 16, /* rightshift */
2037 1, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 FALSE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_dont, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_ADDR16_HIGHA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0xffff, /* dst_mask */
2047 FALSE), /* pcrel_offset */
2048
2049 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2050 HOWTO (R_PPC64_DTPREL16_HIGH,
2051 16, /* rightshift */
2052 1, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_dont, /* complain_on_overflow */
2057 ppc64_elf_unhandled_reloc, /* special_function */
2058 "R_PPC64_DTPREL16_HIGH", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0xffff, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2065 HOWTO (R_PPC64_DTPREL16_HIGHA,
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 ppc64_elf_unhandled_reloc, /* special_function */
2073 "R_PPC64_DTPREL16_HIGHA", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2080 HOWTO (R_PPC64_TPREL16_HIGH,
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_unhandled_reloc, /* special_function */
2088 "R_PPC64_TPREL16_HIGH", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2095 HOWTO (R_PPC64_TPREL16_HIGHA,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_TPREL16_HIGHA", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like ADDR64, but use local entry point of function. */
2110 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2111 0, /* rightshift */
2112 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2113 64, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 bfd_elf_generic_reloc, /* special_function */
2118 "R_PPC64_ADDR64_LOCAL", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 ONES (64), /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* GNU extension to record C++ vtable hierarchy. */
2125 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2126 0, /* rightshift */
2127 0, /* size (0 = byte, 1 = short, 2 = long) */
2128 0, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 NULL, /* special_function */
2133 "R_PPC64_GNU_VTINHERIT", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* GNU extension to record C++ vtable member usage. */
2140 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2141 0, /* rightshift */
2142 0, /* size (0 = byte, 1 = short, 2 = long) */
2143 0, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 NULL, /* special_function */
2148 "R_PPC64_GNU_VTENTRY", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153};
2154
2155\f
2156/* Initialize the ppc64_elf_howto_table, so that linear accesses can
2157 be done. */
2158
2159static void
2160ppc_howto_init (void)
2161{
2162 unsigned int i, type;
2163
2164 for (i = 0;
2165 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2166 i++)
2167 {
2168 type = ppc64_elf_howto_raw[i].type;
2169 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2170 / sizeof (ppc64_elf_howto_table[0])));
2171 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2172 }
2173}
2174
2175static reloc_howto_type *
2176ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2177 bfd_reloc_code_real_type code)
2178{
2179 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2180
2181 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2182 /* Initialize howto table if needed. */
2183 ppc_howto_init ();
2184
2185 switch (code)
2186 {
2187 default:
2188 return NULL;
2189
2190 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2191 break;
2192 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2193 break;
2194 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2195 break;
2196 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2197 break;
2198 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2199 break;
2200 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2201 break;
2202 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2203 break;
2204 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2205 break;
2206 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2207 break;
2208 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2209 break;
2210 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2211 break;
2212 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2213 break;
2214 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2215 break;
2216 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2217 break;
2218 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2219 break;
2220 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2221 break;
2222 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2223 break;
2224 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2225 break;
2226 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2227 break;
2228 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2229 break;
2230 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2231 break;
2232 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2233 break;
2234 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2235 break;
2236 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2237 break;
2238 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2239 break;
2240 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2241 break;
2242 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2243 break;
2244 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2245 break;
2246 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2247 break;
2248 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2249 break;
2250 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2251 break;
2252 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2253 break;
2254 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2255 break;
2256 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2257 break;
2258 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2259 break;
2260 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2261 break;
2262 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2263 break;
2264 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2265 break;
2266 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2267 break;
2268 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2269 break;
2270 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2271 break;
2272 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2273 break;
2274 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2275 break;
2276 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2277 break;
2278 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2279 break;
2280 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2281 break;
2282 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2283 break;
2284 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2285 break;
2286 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2287 break;
2288 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2289 break;
2290 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2291 break;
2292 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2293 break;
2294 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2295 break;
2296 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2297 break;
2298 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2299 break;
2300 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2301 break;
2302 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2303 break;
2304 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2305 break;
2306 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2307 break;
2308 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2309 break;
2310 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2311 break;
2312 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2313 break;
2314 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2315 break;
2316 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2317 break;
2318 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2319 break;
2320 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2321 break;
2322 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2323 break;
2324 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2325 break;
2326 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2327 break;
2328 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2329 break;
2330 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2331 break;
2332 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2333 break;
2334 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2335 break;
2336 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2337 break;
2338 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2339 break;
2340 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2341 break;
2342 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2343 break;
2344 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2345 break;
2346 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2347 break;
2348 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2349 break;
2350 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2351 break;
2352 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2353 break;
2354 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2355 break;
2356 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2357 break;
2358 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2359 break;
2360 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2361 break;
2362 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2363 break;
2364 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2365 break;
2366 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2367 break;
2368 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2369 break;
2370 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2371 break;
2372 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2373 break;
2374 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2375 break;
2376 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2377 break;
2378 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2379 break;
2380 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2381 break;
2382 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2383 break;
2384 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2385 break;
2386 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2389 break;
2390 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2391 break;
2392 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2393 break;
2394 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2395 break;
2396 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2397 break;
2398 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2399 break;
2400 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2403 break;
2404 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2405 break;
2406 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2407 break;
2408 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2409 break;
2410 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2411 break;
2412 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2413 break;
2414 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2415 break;
2416 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2417 break;
2418 }
2419
2420 return ppc64_elf_howto_table[r];
2421};
2422
2423static reloc_howto_type *
2424ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2425 const char *r_name)
2426{
2427 unsigned int i;
2428
2429 for (i = 0;
2430 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2431 i++)
2432 if (ppc64_elf_howto_raw[i].name != NULL
2433 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2434 return &ppc64_elf_howto_raw[i];
2435
2436 return NULL;
2437}
2438
2439/* Set the howto pointer for a PowerPC ELF reloc. */
2440
2441static void
2442ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2443 Elf_Internal_Rela *dst)
2444{
2445 unsigned int type;
2446
2447 /* Initialize howto table if needed. */
2448 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2449 ppc_howto_init ();
2450
2451 type = ELF64_R_TYPE (dst->r_info);
2452 if (type >= (sizeof (ppc64_elf_howto_table)
2453 / sizeof (ppc64_elf_howto_table[0])))
2454 {
2455 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2456 abfd, (int) type);
2457 type = R_PPC64_NONE;
2458 }
2459 cache_ptr->howto = ppc64_elf_howto_table[type];
2460}
2461
2462/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2463
2464static bfd_reloc_status_type
2465ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2466 void *data, asection *input_section,
2467 bfd *output_bfd, char **error_message)
2468{
2469 /* If this is a relocatable link (output_bfd test tells us), just
2470 call the generic function. Any adjustment will be done at final
2471 link time. */
2472 if (output_bfd != NULL)
2473 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2474 input_section, output_bfd, error_message);
2475
2476 /* Adjust the addend for sign extension of the low 16 bits.
2477 We won't actually be using the low 16 bits, so trashing them
2478 doesn't matter. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481}
2482
2483static bfd_reloc_status_type
2484ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487{
2488 if (output_bfd != NULL)
2489 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2490 input_section, output_bfd, error_message);
2491
2492 if (strcmp (symbol->section->name, ".opd") == 0
2493 && (symbol->section->owner->flags & DYNAMIC) == 0)
2494 {
2495 bfd_vma dest = opd_entry_value (symbol->section,
2496 symbol->value + reloc_entry->addend,
2497 NULL, NULL, FALSE);
2498 if (dest != (bfd_vma) -1)
2499 reloc_entry->addend = dest - (symbol->value
2500 + symbol->section->output_section->vma
2501 + symbol->section->output_offset);
2502 }
2503 else
2504 {
2505 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2506
2507 if (symbol->section->owner != abfd
2508 && abiversion (symbol->section->owner) >= 2)
2509 {
2510 unsigned int i;
2511
2512 for (i = 0; i < symbol->section->owner->symcount; ++i)
2513 {
2514 asymbol *symdef = symbol->section->owner->outsymbols[i];
2515
2516 if (strcmp (symdef->name, symbol->name) == 0)
2517 {
2518 elfsym = (elf_symbol_type *) symdef;
2519 break;
2520 }
2521 }
2522 }
2523 reloc_entry->addend
2524 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2525 }
2526 return bfd_reloc_continue;
2527}
2528
2529static bfd_reloc_status_type
2530ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2531 void *data, asection *input_section,
2532 bfd *output_bfd, char **error_message)
2533{
2534 long insn;
2535 enum elf_ppc64_reloc_type r_type;
2536 bfd_size_type octets;
2537 /* Assume 'at' branch hints. */
2538 bfd_boolean is_isa_v2 = TRUE;
2539
2540 /* If this is a relocatable link (output_bfd test tells us), just
2541 call the generic function. Any adjustment will be done at final
2542 link time. */
2543 if (output_bfd != NULL)
2544 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2545 input_section, output_bfd, error_message);
2546
2547 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2548 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2549 insn &= ~(0x01 << 21);
2550 r_type = reloc_entry->howto->type;
2551 if (r_type == R_PPC64_ADDR14_BRTAKEN
2552 || r_type == R_PPC64_REL14_BRTAKEN)
2553 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2554
2555 if (is_isa_v2)
2556 {
2557 /* Set 'a' bit. This is 0b00010 in BO field for branch
2558 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2559 for branch on CTR insns (BO == 1a00t or 1a01t). */
2560 if ((insn & (0x14 << 21)) == (0x04 << 21))
2561 insn |= 0x02 << 21;
2562 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2563 insn |= 0x08 << 21;
2564 else
2565 goto out;
2566 }
2567 else
2568 {
2569 bfd_vma target = 0;
2570 bfd_vma from;
2571
2572 if (!bfd_is_com_section (symbol->section))
2573 target = symbol->value;
2574 target += symbol->section->output_section->vma;
2575 target += symbol->section->output_offset;
2576 target += reloc_entry->addend;
2577
2578 from = (reloc_entry->address
2579 + input_section->output_offset
2580 + input_section->output_section->vma);
2581
2582 /* Invert 'y' bit if not the default. */
2583 if ((bfd_signed_vma) (target - from) < 0)
2584 insn ^= 0x01 << 21;
2585 }
2586 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2587 out:
2588 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2589 input_section, output_bfd, error_message);
2590}
2591
2592static bfd_reloc_status_type
2593ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2594 void *data, asection *input_section,
2595 bfd *output_bfd, char **error_message)
2596{
2597 /* If this is a relocatable link (output_bfd test tells us), just
2598 call the generic function. Any adjustment will be done at final
2599 link time. */
2600 if (output_bfd != NULL)
2601 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2602 input_section, output_bfd, error_message);
2603
2604 /* Subtract the symbol section base address. */
2605 reloc_entry->addend -= symbol->section->output_section->vma;
2606 return bfd_reloc_continue;
2607}
2608
2609static bfd_reloc_status_type
2610ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2611 void *data, asection *input_section,
2612 bfd *output_bfd, char **error_message)
2613{
2614 /* If this is a relocatable link (output_bfd test tells us), just
2615 call the generic function. Any adjustment will be done at final
2616 link time. */
2617 if (output_bfd != NULL)
2618 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2619 input_section, output_bfd, error_message);
2620
2621 /* Subtract the symbol section base address. */
2622 reloc_entry->addend -= symbol->section->output_section->vma;
2623
2624 /* Adjust the addend for sign extension of the low 16 bits. */
2625 reloc_entry->addend += 0x8000;
2626 return bfd_reloc_continue;
2627}
2628
2629static bfd_reloc_status_type
2630ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2631 void *data, asection *input_section,
2632 bfd *output_bfd, char **error_message)
2633{
2634 bfd_vma TOCstart;
2635
2636 /* If this is a relocatable link (output_bfd test tells us), just
2637 call the generic function. Any adjustment will be done at final
2638 link time. */
2639 if (output_bfd != NULL)
2640 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2641 input_section, output_bfd, error_message);
2642
2643 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2644 if (TOCstart == 0)
2645 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2646
2647 /* Subtract the TOC base address. */
2648 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2649 return bfd_reloc_continue;
2650}
2651
2652static bfd_reloc_status_type
2653ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2654 void *data, asection *input_section,
2655 bfd *output_bfd, char **error_message)
2656{
2657 bfd_vma TOCstart;
2658
2659 /* If this is a relocatable link (output_bfd test tells us), just
2660 call the generic function. Any adjustment will be done at final
2661 link time. */
2662 if (output_bfd != NULL)
2663 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2664 input_section, output_bfd, error_message);
2665
2666 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2667 if (TOCstart == 0)
2668 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2669
2670 /* Subtract the TOC base address. */
2671 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2672
2673 /* Adjust the addend for sign extension of the low 16 bits. */
2674 reloc_entry->addend += 0x8000;
2675 return bfd_reloc_continue;
2676}
2677
2678static bfd_reloc_status_type
2679ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2680 void *data, asection *input_section,
2681 bfd *output_bfd, char **error_message)
2682{
2683 bfd_vma TOCstart;
2684 bfd_size_type octets;
2685
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2694 if (TOCstart == 0)
2695 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2696
2697 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2698 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2699 return bfd_reloc_ok;
2700}
2701
2702static bfd_reloc_status_type
2703ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2704 void *data, asection *input_section,
2705 bfd *output_bfd, char **error_message)
2706{
2707 /* If this is a relocatable link (output_bfd test tells us), just
2708 call the generic function. Any adjustment will be done at final
2709 link time. */
2710 if (output_bfd != NULL)
2711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2712 input_section, output_bfd, error_message);
2713
2714 if (error_message != NULL)
2715 {
2716 static char buf[60];
2717 sprintf (buf, "generic linker can't handle %s",
2718 reloc_entry->howto->name);
2719 *error_message = buf;
2720 }
2721 return bfd_reloc_dangerous;
2722}
2723
2724/* Track GOT entries needed for a given symbol. We might need more
2725 than one got entry per symbol. */
2726struct got_entry
2727{
2728 struct got_entry *next;
2729
2730 /* The symbol addend that we'll be placing in the GOT. */
2731 bfd_vma addend;
2732
2733 /* Unlike other ELF targets, we use separate GOT entries for the same
2734 symbol referenced from different input files. This is to support
2735 automatic multiple TOC/GOT sections, where the TOC base can vary
2736 from one input file to another. After partitioning into TOC groups
2737 we merge entries within the group.
2738
2739 Point to the BFD owning this GOT entry. */
2740 bfd *owner;
2741
2742 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2743 TLS_TPREL or TLS_DTPREL for tls entries. */
2744 unsigned char tls_type;
2745
2746 /* Non-zero if got.ent points to real entry. */
2747 unsigned char is_indirect;
2748
2749 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2750 union
2751 {
2752 bfd_signed_vma refcount;
2753 bfd_vma offset;
2754 struct got_entry *ent;
2755 } got;
2756};
2757
2758/* The same for PLT. */
2759struct plt_entry
2760{
2761 struct plt_entry *next;
2762
2763 bfd_vma addend;
2764
2765 union
2766 {
2767 bfd_signed_vma refcount;
2768 bfd_vma offset;
2769 } plt;
2770};
2771
2772struct ppc64_elf_obj_tdata
2773{
2774 struct elf_obj_tdata elf;
2775
2776 /* Shortcuts to dynamic linker sections. */
2777 asection *got;
2778 asection *relgot;
2779
2780 /* Used during garbage collection. We attach global symbols defined
2781 on removed .opd entries to this section so that the sym is removed. */
2782 asection *deleted_section;
2783
2784 /* TLS local dynamic got entry handling. Support for multiple GOT
2785 sections means we potentially need one of these for each input bfd. */
2786 struct got_entry tlsld_got;
2787
2788 union {
2789 /* A copy of relocs before they are modified for --emit-relocs. */
2790 Elf_Internal_Rela *relocs;
2791
2792 /* Section contents. */
2793 bfd_byte *contents;
2794 } opd;
2795
2796 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2797 the reloc to be in the range -32768 to 32767. */
2798 unsigned int has_small_toc_reloc : 1;
2799
2800 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2801 instruction not one we handle. */
2802 unsigned int unexpected_toc_insn : 1;
2803};
2804
2805#define ppc64_elf_tdata(bfd) \
2806 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2807
2808#define ppc64_tlsld_got(bfd) \
2809 (&ppc64_elf_tdata (bfd)->tlsld_got)
2810
2811#define is_ppc64_elf(bfd) \
2812 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2813 && elf_object_id (bfd) == PPC64_ELF_DATA)
2814
2815/* Override the generic function because we store some extras. */
2816
2817static bfd_boolean
2818ppc64_elf_mkobject (bfd *abfd)
2819{
2820 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2821 PPC64_ELF_DATA);
2822}
2823
2824/* Fix bad default arch selected for a 64 bit input bfd when the
2825 default is 32 bit. */
2826
2827static bfd_boolean
2828ppc64_elf_object_p (bfd *abfd)
2829{
2830 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2831 {
2832 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2833
2834 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2835 {
2836 /* Relies on arch after 32 bit default being 64 bit default. */
2837 abfd->arch_info = abfd->arch_info->next;
2838 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2839 }
2840 }
2841 return TRUE;
2842}
2843
2844/* Support for core dump NOTE sections. */
2845
2846static bfd_boolean
2847ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2848{
2849 size_t offset, size;
2850
2851 if (note->descsz != 504)
2852 return FALSE;
2853
2854 /* pr_cursig */
2855 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2856
2857 /* pr_pid */
2858 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2859
2860 /* pr_reg */
2861 offset = 112;
2862 size = 384;
2863
2864 /* Make a ".reg/999" section. */
2865 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2866 size, note->descpos + offset);
2867}
2868
2869static bfd_boolean
2870ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2871{
2872 if (note->descsz != 136)
2873 return FALSE;
2874
2875 elf_tdata (abfd)->core->pid
2876 = bfd_get_32 (abfd, note->descdata + 24);
2877 elf_tdata (abfd)->core->program
2878 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2879 elf_tdata (abfd)->core->command
2880 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2881
2882 return TRUE;
2883}
2884
2885static char *
2886ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2887 ...)
2888{
2889 switch (note_type)
2890 {
2891 default:
2892 return NULL;
2893
2894 case NT_PRPSINFO:
2895 {
2896 char data[136];
2897 va_list ap;
2898
2899 va_start (ap, note_type);
2900 memset (data, 0, sizeof (data));
2901 strncpy (data + 40, va_arg (ap, const char *), 16);
2902 strncpy (data + 56, va_arg (ap, const char *), 80);
2903 va_end (ap);
2904 return elfcore_write_note (abfd, buf, bufsiz,
2905 "CORE", note_type, data, sizeof (data));
2906 }
2907
2908 case NT_PRSTATUS:
2909 {
2910 char data[504];
2911 va_list ap;
2912 long pid;
2913 int cursig;
2914 const void *greg;
2915
2916 va_start (ap, note_type);
2917 memset (data, 0, 112);
2918 pid = va_arg (ap, long);
2919 bfd_put_32 (abfd, pid, data + 32);
2920 cursig = va_arg (ap, int);
2921 bfd_put_16 (abfd, cursig, data + 12);
2922 greg = va_arg (ap, const void *);
2923 memcpy (data + 112, greg, 384);
2924 memset (data + 496, 0, 8);
2925 va_end (ap);
2926 return elfcore_write_note (abfd, buf, bufsiz,
2927 "CORE", note_type, data, sizeof (data));
2928 }
2929 }
2930}
2931
2932/* Add extra PPC sections. */
2933
2934static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2935{
2936 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2937 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2938 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2939 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2940 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2941 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2942 { NULL, 0, 0, 0, 0 }
2943};
2944
2945enum _ppc64_sec_type {
2946 sec_normal = 0,
2947 sec_opd = 1,
2948 sec_toc = 2
2949};
2950
2951struct _ppc64_elf_section_data
2952{
2953 struct bfd_elf_section_data elf;
2954
2955 union
2956 {
2957 /* An array with one entry for each opd function descriptor,
2958 and some spares since opd entries may be either 16 or 24 bytes. */
2959#define OPD_NDX(OFF) ((OFF) >> 4)
2960 struct _opd_sec_data
2961 {
2962 /* Points to the function code section for local opd entries. */
2963 asection **func_sec;
2964
2965 /* After editing .opd, adjust references to opd local syms. */
2966 long *adjust;
2967 } opd;
2968
2969 /* An array for toc sections, indexed by offset/8. */
2970 struct _toc_sec_data
2971 {
2972 /* Specifies the relocation symbol index used at a given toc offset. */
2973 unsigned *symndx;
2974
2975 /* And the relocation addend. */
2976 bfd_vma *add;
2977 } toc;
2978 } u;
2979
2980 enum _ppc64_sec_type sec_type:2;
2981
2982 /* Flag set when small branches are detected. Used to
2983 select suitable defaults for the stub group size. */
2984 unsigned int has_14bit_branch:1;
2985};
2986
2987#define ppc64_elf_section_data(sec) \
2988 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2989
2990static bfd_boolean
2991ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2992{
2993 if (!sec->used_by_bfd)
2994 {
2995 struct _ppc64_elf_section_data *sdata;
2996 bfd_size_type amt = sizeof (*sdata);
2997
2998 sdata = bfd_zalloc (abfd, amt);
2999 if (sdata == NULL)
3000 return FALSE;
3001 sec->used_by_bfd = sdata;
3002 }
3003
3004 return _bfd_elf_new_section_hook (abfd, sec);
3005}
3006
3007static struct _opd_sec_data *
3008get_opd_info (asection * sec)
3009{
3010 if (sec != NULL
3011 && ppc64_elf_section_data (sec) != NULL
3012 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3013 return &ppc64_elf_section_data (sec)->u.opd;
3014 return NULL;
3015}
3016\f
3017/* Parameters for the qsort hook. */
3018static bfd_boolean synthetic_relocatable;
3019
3020/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3021
3022static int
3023compare_symbols (const void *ap, const void *bp)
3024{
3025 const asymbol *a = * (const asymbol **) ap;
3026 const asymbol *b = * (const asymbol **) bp;
3027
3028 /* Section symbols first. */
3029 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3030 return -1;
3031 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3032 return 1;
3033
3034 /* then .opd symbols. */
3035 if (strcmp (a->section->name, ".opd") == 0
3036 && strcmp (b->section->name, ".opd") != 0)
3037 return -1;
3038 if (strcmp (a->section->name, ".opd") != 0
3039 && strcmp (b->section->name, ".opd") == 0)
3040 return 1;
3041
3042 /* then other code symbols. */
3043 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3044 == (SEC_CODE | SEC_ALLOC)
3045 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3046 != (SEC_CODE | SEC_ALLOC))
3047 return -1;
3048
3049 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3050 != (SEC_CODE | SEC_ALLOC)
3051 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3052 == (SEC_CODE | SEC_ALLOC))
3053 return 1;
3054
3055 if (synthetic_relocatable)
3056 {
3057 if (a->section->id < b->section->id)
3058 return -1;
3059
3060 if (a->section->id > b->section->id)
3061 return 1;
3062 }
3063
3064 if (a->value + a->section->vma < b->value + b->section->vma)
3065 return -1;
3066
3067 if (a->value + a->section->vma > b->value + b->section->vma)
3068 return 1;
3069
3070 /* For syms with the same value, prefer strong dynamic global function
3071 syms over other syms. */
3072 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3073 return -1;
3074
3075 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3076 return 1;
3077
3078 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3079 return -1;
3080
3081 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3082 return 1;
3083
3084 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3085 return -1;
3086
3087 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3088 return 1;
3089
3090 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3091 return -1;
3092
3093 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3094 return 1;
3095
3096 return 0;
3097}
3098
3099/* Search SYMS for a symbol of the given VALUE. */
3100
3101static asymbol *
3102sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3103{
3104 long mid;
3105
3106 if (id == -1)
3107 {
3108 while (lo < hi)
3109 {
3110 mid = (lo + hi) >> 1;
3111 if (syms[mid]->value + syms[mid]->section->vma < value)
3112 lo = mid + 1;
3113 else if (syms[mid]->value + syms[mid]->section->vma > value)
3114 hi = mid;
3115 else
3116 return syms[mid];
3117 }
3118 }
3119 else
3120 {
3121 while (lo < hi)
3122 {
3123 mid = (lo + hi) >> 1;
3124 if (syms[mid]->section->id < id)
3125 lo = mid + 1;
3126 else if (syms[mid]->section->id > id)
3127 hi = mid;
3128 else if (syms[mid]->value < value)
3129 lo = mid + 1;
3130 else if (syms[mid]->value > value)
3131 hi = mid;
3132 else
3133 return syms[mid];
3134 }
3135 }
3136 return NULL;
3137}
3138
3139static bfd_boolean
3140section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3141{
3142 bfd_vma vma = *(bfd_vma *) ptr;
3143 return ((section->flags & SEC_ALLOC) != 0
3144 && section->vma <= vma
3145 && vma < section->vma + section->size);
3146}
3147
3148/* Create synthetic symbols, effectively restoring "dot-symbol" function
3149 entry syms. Also generate @plt symbols for the glink branch table. */
3150
3151static long
3152ppc64_elf_get_synthetic_symtab (bfd *abfd,
3153 long static_count, asymbol **static_syms,
3154 long dyn_count, asymbol **dyn_syms,
3155 asymbol **ret)
3156{
3157 asymbol *s;
3158 long i;
3159 long count;
3160 char *names;
3161 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3162 asection *opd = NULL;
3163 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3164 asymbol **syms;
3165 int abi = abiversion (abfd);
3166
3167 *ret = NULL;
3168
3169 if (abi < 2)
3170 {
3171 opd = bfd_get_section_by_name (abfd, ".opd");
3172 if (opd == NULL && abi == 1)
3173 return 0;
3174 }
3175
3176 symcount = static_count;
3177 if (!relocatable)
3178 symcount += dyn_count;
3179 if (symcount == 0)
3180 return 0;
3181
3182 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3183 if (syms == NULL)
3184 return -1;
3185
3186 if (!relocatable && static_count != 0 && dyn_count != 0)
3187 {
3188 /* Use both symbol tables. */
3189 memcpy (syms, static_syms, static_count * sizeof (*syms));
3190 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3191 }
3192 else if (!relocatable && static_count == 0)
3193 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3194 else
3195 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3196
3197 synthetic_relocatable = relocatable;
3198 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3199
3200 if (!relocatable && symcount > 1)
3201 {
3202 long j;
3203 /* Trim duplicate syms, since we may have merged the normal and
3204 dynamic symbols. Actually, we only care about syms that have
3205 different values, so trim any with the same value. */
3206 for (i = 1, j = 1; i < symcount; ++i)
3207 if (syms[i - 1]->value + syms[i - 1]->section->vma
3208 != syms[i]->value + syms[i]->section->vma)
3209 syms[j++] = syms[i];
3210 symcount = j;
3211 }
3212
3213 i = 0;
3214 if (strcmp (syms[i]->section->name, ".opd") == 0)
3215 ++i;
3216 codesecsym = i;
3217
3218 for (; i < symcount; ++i)
3219 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3220 != (SEC_CODE | SEC_ALLOC))
3221 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3222 break;
3223 codesecsymend = i;
3224
3225 for (; i < symcount; ++i)
3226 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3227 break;
3228 secsymend = i;
3229
3230 for (; i < symcount; ++i)
3231 if (strcmp (syms[i]->section->name, ".opd") != 0)
3232 break;
3233 opdsymend = i;
3234
3235 for (; i < symcount; ++i)
3236 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3237 != (SEC_CODE | SEC_ALLOC))
3238 break;
3239 symcount = i;
3240
3241 count = 0;
3242
3243 if (relocatable)
3244 {
3245 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3246 arelent *r;
3247 size_t size;
3248 long relcount;
3249
3250 if (opdsymend == secsymend)
3251 goto done;
3252
3253 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3254 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3255 if (relcount == 0)
3256 goto done;
3257
3258 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3259 {
3260 count = -1;
3261 goto done;
3262 }
3263
3264 size = 0;
3265 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3266 {
3267 asymbol *sym;
3268
3269 while (r < opd->relocation + relcount
3270 && r->address < syms[i]->value + opd->vma)
3271 ++r;
3272
3273 if (r == opd->relocation + relcount)
3274 break;
3275
3276 if (r->address != syms[i]->value + opd->vma)
3277 continue;
3278
3279 if (r->howto->type != R_PPC64_ADDR64)
3280 continue;
3281
3282 sym = *r->sym_ptr_ptr;
3283 if (!sym_exists_at (syms, opdsymend, symcount,
3284 sym->section->id, sym->value + r->addend))
3285 {
3286 ++count;
3287 size += sizeof (asymbol);
3288 size += strlen (syms[i]->name) + 2;
3289 }
3290 }
3291
3292 s = *ret = bfd_malloc (size);
3293 if (s == NULL)
3294 {
3295 count = -1;
3296 goto done;
3297 }
3298
3299 names = (char *) (s + count);
3300
3301 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3302 {
3303 asymbol *sym;
3304
3305 while (r < opd->relocation + relcount
3306 && r->address < syms[i]->value + opd->vma)
3307 ++r;
3308
3309 if (r == opd->relocation + relcount)
3310 break;
3311
3312 if (r->address != syms[i]->value + opd->vma)
3313 continue;
3314
3315 if (r->howto->type != R_PPC64_ADDR64)
3316 continue;
3317
3318 sym = *r->sym_ptr_ptr;
3319 if (!sym_exists_at (syms, opdsymend, symcount,
3320 sym->section->id, sym->value + r->addend))
3321 {
3322 size_t len;
3323
3324 *s = *syms[i];
3325 s->flags |= BSF_SYNTHETIC;
3326 s->section = sym->section;
3327 s->value = sym->value + r->addend;
3328 s->name = names;
3329 *names++ = '.';
3330 len = strlen (syms[i]->name);
3331 memcpy (names, syms[i]->name, len + 1);
3332 names += len + 1;
3333 /* Have udata.p point back to the original symbol this
3334 synthetic symbol was derived from. */
3335 s->udata.p = syms[i];
3336 s++;
3337 }
3338 }
3339 }
3340 else
3341 {
3342 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3343 bfd_byte *contents = NULL;
3344 size_t size;
3345 long plt_count = 0;
3346 bfd_vma glink_vma = 0, resolv_vma = 0;
3347 asection *dynamic, *glink = NULL, *relplt = NULL;
3348 arelent *p;
3349
3350 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3351 {
3352 free_contents_and_exit:
3353 if (contents)
3354 free (contents);
3355 count = -1;
3356 goto done;
3357 }
3358
3359 size = 0;
3360 for (i = secsymend; i < opdsymend; ++i)
3361 {
3362 bfd_vma ent;
3363
3364 /* Ignore bogus symbols. */
3365 if (syms[i]->value > opd->size - 8)
3366 continue;
3367
3368 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3369 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3370 {
3371 ++count;
3372 size += sizeof (asymbol);
3373 size += strlen (syms[i]->name) + 2;
3374 }
3375 }
3376
3377 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3378 if (dyn_count != 0
3379 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3380 {
3381 bfd_byte *dynbuf, *extdyn, *extdynend;
3382 size_t extdynsize;
3383 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3384
3385 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3386 goto free_contents_and_exit;
3387
3388 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3389 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3390
3391 extdyn = dynbuf;
3392 extdynend = extdyn + dynamic->size;
3393 for (; extdyn < extdynend; extdyn += extdynsize)
3394 {
3395 Elf_Internal_Dyn dyn;
3396 (*swap_dyn_in) (abfd, extdyn, &dyn);
3397
3398 if (dyn.d_tag == DT_NULL)
3399 break;
3400
3401 if (dyn.d_tag == DT_PPC64_GLINK)
3402 {
3403 /* The first glink stub starts at offset 32; see
3404 comment in ppc64_elf_finish_dynamic_sections. */
3405 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3406 /* The .glink section usually does not survive the final
3407 link; search for the section (usually .text) where the
3408 glink stubs now reside. */
3409 glink = bfd_sections_find_if (abfd, section_covers_vma,
3410 &glink_vma);
3411 break;
3412 }
3413 }
3414
3415 free (dynbuf);
3416 }
3417
3418 if (glink != NULL)
3419 {
3420 /* Determine __glink trampoline by reading the relative branch
3421 from the first glink stub. */
3422 bfd_byte buf[4];
3423 unsigned int off = 0;
3424
3425 while (bfd_get_section_contents (abfd, glink, buf,
3426 glink_vma + off - glink->vma, 4))
3427 {
3428 unsigned int insn = bfd_get_32 (abfd, buf);
3429 insn ^= B_DOT;
3430 if ((insn & ~0x3fffffc) == 0)
3431 {
3432 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3433 break;
3434 }
3435 off += 4;
3436 if (off > 4)
3437 break;
3438 }
3439
3440 if (resolv_vma)
3441 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3442
3443 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3444 if (relplt != NULL)
3445 {
3446 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3447 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3448 goto free_contents_and_exit;
3449
3450 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3451 size += plt_count * sizeof (asymbol);
3452
3453 p = relplt->relocation;
3454 for (i = 0; i < plt_count; i++, p++)
3455 {
3456 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3457 if (p->addend != 0)
3458 size += sizeof ("+0x") - 1 + 16;
3459 }
3460 }
3461 }
3462
3463 s = *ret = bfd_malloc (size);
3464 if (s == NULL)
3465 goto free_contents_and_exit;
3466
3467 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3468
3469 for (i = secsymend; i < opdsymend; ++i)
3470 {
3471 bfd_vma ent;
3472
3473 if (syms[i]->value > opd->size - 8)
3474 continue;
3475
3476 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3477 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3478 {
3479 long lo, hi;
3480 size_t len;
3481 asection *sec = abfd->sections;
3482
3483 *s = *syms[i];
3484 lo = codesecsym;
3485 hi = codesecsymend;
3486 while (lo < hi)
3487 {
3488 long mid = (lo + hi) >> 1;
3489 if (syms[mid]->section->vma < ent)
3490 lo = mid + 1;
3491 else if (syms[mid]->section->vma > ent)
3492 hi = mid;
3493 else
3494 {
3495 sec = syms[mid]->section;
3496 break;
3497 }
3498 }
3499
3500 if (lo >= hi && lo > codesecsym)
3501 sec = syms[lo - 1]->section;
3502
3503 for (; sec != NULL; sec = sec->next)
3504 {
3505 if (sec->vma > ent)
3506 break;
3507 /* SEC_LOAD may not be set if SEC is from a separate debug
3508 info file. */
3509 if ((sec->flags & SEC_ALLOC) == 0)
3510 break;
3511 if ((sec->flags & SEC_CODE) != 0)
3512 s->section = sec;
3513 }
3514 s->flags |= BSF_SYNTHETIC;
3515 s->value = ent - s->section->vma;
3516 s->name = names;
3517 *names++ = '.';
3518 len = strlen (syms[i]->name);
3519 memcpy (names, syms[i]->name, len + 1);
3520 names += len + 1;
3521 /* Have udata.p point back to the original symbol this
3522 synthetic symbol was derived from. */
3523 s->udata.p = syms[i];
3524 s++;
3525 }
3526 }
3527 free (contents);
3528
3529 if (glink != NULL && relplt != NULL)
3530 {
3531 if (resolv_vma)
3532 {
3533 /* Add a symbol for the main glink trampoline. */
3534 memset (s, 0, sizeof *s);
3535 s->the_bfd = abfd;
3536 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3537 s->section = glink;
3538 s->value = resolv_vma - glink->vma;
3539 s->name = names;
3540 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3541 names += sizeof ("__glink_PLTresolve");
3542 s++;
3543 count++;
3544 }
3545
3546 /* FIXME: It would be very much nicer to put sym@plt on the
3547 stub rather than on the glink branch table entry. The
3548 objdump disassembler would then use a sensible symbol
3549 name on plt calls. The difficulty in doing so is
3550 a) finding the stubs, and,
3551 b) matching stubs against plt entries, and,
3552 c) there can be multiple stubs for a given plt entry.
3553
3554 Solving (a) could be done by code scanning, but older
3555 ppc64 binaries used different stubs to current code.
3556 (b) is the tricky one since you need to known the toc
3557 pointer for at least one function that uses a pic stub to
3558 be able to calculate the plt address referenced.
3559 (c) means gdb would need to set multiple breakpoints (or
3560 find the glink branch itself) when setting breakpoints
3561 for pending shared library loads. */
3562 p = relplt->relocation;
3563 for (i = 0; i < plt_count; i++, p++)
3564 {
3565 size_t len;
3566
3567 *s = **p->sym_ptr_ptr;
3568 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3569 we are defining a symbol, ensure one of them is set. */
3570 if ((s->flags & BSF_LOCAL) == 0)
3571 s->flags |= BSF_GLOBAL;
3572 s->flags |= BSF_SYNTHETIC;
3573 s->section = glink;
3574 s->value = glink_vma - glink->vma;
3575 s->name = names;
3576 s->udata.p = NULL;
3577 len = strlen ((*p->sym_ptr_ptr)->name);
3578 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3579 names += len;
3580 if (p->addend != 0)
3581 {
3582 memcpy (names, "+0x", sizeof ("+0x") - 1);
3583 names += sizeof ("+0x") - 1;
3584 bfd_sprintf_vma (abfd, names, p->addend);
3585 names += strlen (names);
3586 }
3587 memcpy (names, "@plt", sizeof ("@plt"));
3588 names += sizeof ("@plt");
3589 s++;
3590 if (abi < 2)
3591 {
3592 glink_vma += 8;
3593 if (i >= 0x8000)
3594 glink_vma += 4;
3595 }
3596 else
3597 glink_vma += 4;
3598 }
3599 count += plt_count;
3600 }
3601 }
3602
3603 done:
3604 free (syms);
3605 return count;
3606}
3607\f
3608/* The following functions are specific to the ELF linker, while
3609 functions above are used generally. Those named ppc64_elf_* are
3610 called by the main ELF linker code. They appear in this file more
3611 or less in the order in which they are called. eg.
3612 ppc64_elf_check_relocs is called early in the link process,
3613 ppc64_elf_finish_dynamic_sections is one of the last functions
3614 called.
3615
3616 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3617 functions have both a function code symbol and a function descriptor
3618 symbol. A call to foo in a relocatable object file looks like:
3619
3620 . .text
3621 . x:
3622 . bl .foo
3623 . nop
3624
3625 The function definition in another object file might be:
3626
3627 . .section .opd
3628 . foo: .quad .foo
3629 . .quad .TOC.@tocbase
3630 . .quad 0
3631 .
3632 . .text
3633 . .foo: blr
3634
3635 When the linker resolves the call during a static link, the branch
3636 unsurprisingly just goes to .foo and the .opd information is unused.
3637 If the function definition is in a shared library, things are a little
3638 different: The call goes via a plt call stub, the opd information gets
3639 copied to the plt, and the linker patches the nop.
3640
3641 . x:
3642 . bl .foo_stub
3643 . ld 2,40(1)
3644 .
3645 .
3646 . .foo_stub:
3647 . std 2,40(1) # in practice, the call stub
3648 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3649 . addi 11,11,Lfoo@toc@l # this is the general idea
3650 . ld 12,0(11)
3651 . ld 2,8(11)
3652 . mtctr 12
3653 . ld 11,16(11)
3654 . bctr
3655 .
3656 . .section .plt
3657 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3658
3659 The "reloc ()" notation is supposed to indicate that the linker emits
3660 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3661 copying.
3662
3663 What are the difficulties here? Well, firstly, the relocations
3664 examined by the linker in check_relocs are against the function code
3665 sym .foo, while the dynamic relocation in the plt is emitted against
3666 the function descriptor symbol, foo. Somewhere along the line, we need
3667 to carefully copy dynamic link information from one symbol to the other.
3668 Secondly, the generic part of the elf linker will make .foo a dynamic
3669 symbol as is normal for most other backends. We need foo dynamic
3670 instead, at least for an application final link. However, when
3671 creating a shared library containing foo, we need to have both symbols
3672 dynamic so that references to .foo are satisfied during the early
3673 stages of linking. Otherwise the linker might decide to pull in a
3674 definition from some other object, eg. a static library.
3675
3676 Update: As of August 2004, we support a new convention. Function
3677 calls may use the function descriptor symbol, ie. "bl foo". This
3678 behaves exactly as "bl .foo". */
3679
3680/* Of those relocs that might be copied as dynamic relocs, this function
3681 selects those that must be copied when linking a shared library,
3682 even when the symbol is local. */
3683
3684static int
3685must_be_dyn_reloc (struct bfd_link_info *info,
3686 enum elf_ppc64_reloc_type r_type)
3687{
3688 switch (r_type)
3689 {
3690 default:
3691 return 1;
3692
3693 case R_PPC64_REL32:
3694 case R_PPC64_REL64:
3695 case R_PPC64_REL30:
3696 return 0;
3697
3698 case R_PPC64_TPREL16:
3699 case R_PPC64_TPREL16_LO:
3700 case R_PPC64_TPREL16_HI:
3701 case R_PPC64_TPREL16_HA:
3702 case R_PPC64_TPREL16_DS:
3703 case R_PPC64_TPREL16_LO_DS:
3704 case R_PPC64_TPREL16_HIGH:
3705 case R_PPC64_TPREL16_HIGHA:
3706 case R_PPC64_TPREL16_HIGHER:
3707 case R_PPC64_TPREL16_HIGHERA:
3708 case R_PPC64_TPREL16_HIGHEST:
3709 case R_PPC64_TPREL16_HIGHESTA:
3710 case R_PPC64_TPREL64:
3711 return !info->executable;
3712 }
3713}
3714
3715/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3716 copying dynamic variables from a shared lib into an app's dynbss
3717 section, and instead use a dynamic relocation to point into the
3718 shared lib. With code that gcc generates, it's vital that this be
3719 enabled; In the PowerPC64 ABI, the address of a function is actually
3720 the address of a function descriptor, which resides in the .opd
3721 section. gcc uses the descriptor directly rather than going via the
3722 GOT as some other ABI's do, which means that initialized function
3723 pointers must reference the descriptor. Thus, a function pointer
3724 initialized to the address of a function in a shared library will
3725 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3726 redefines the function descriptor symbol to point to the copy. This
3727 presents a problem as a plt entry for that function is also
3728 initialized from the function descriptor symbol and the copy reloc
3729 may not be initialized first. */
3730#define ELIMINATE_COPY_RELOCS 1
3731
3732/* Section name for stubs is the associated section name plus this
3733 string. */
3734#define STUB_SUFFIX ".stub"
3735
3736/* Linker stubs.
3737 ppc_stub_long_branch:
3738 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3739 destination, but a 24 bit branch in a stub section will reach.
3740 . b dest
3741
3742 ppc_stub_plt_branch:
3743 Similar to the above, but a 24 bit branch in the stub section won't
3744 reach its destination.
3745 . addis %r11,%r2,xxx@toc@ha
3746 . ld %r12,xxx@toc@l(%r11)
3747 . mtctr %r12
3748 . bctr
3749
3750 ppc_stub_plt_call:
3751 Used to call a function in a shared library. If it so happens that
3752 the plt entry referenced crosses a 64k boundary, then an extra
3753 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3754 . std %r2,40(%r1)
3755 . addis %r11,%r2,xxx@toc@ha
3756 . ld %r12,xxx+0@toc@l(%r11)
3757 . mtctr %r12
3758 . ld %r2,xxx+8@toc@l(%r11)
3759 . ld %r11,xxx+16@toc@l(%r11)
3760 . bctr
3761
3762 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3763 code to adjust the value and save r2 to support multiple toc sections.
3764 A ppc_stub_long_branch with an r2 offset looks like:
3765 . std %r2,40(%r1)
3766 . addis %r2,%r2,off@ha
3767 . addi %r2,%r2,off@l
3768 . b dest
3769
3770 A ppc_stub_plt_branch with an r2 offset looks like:
3771 . std %r2,40(%r1)
3772 . addis %r11,%r2,xxx@toc@ha
3773 . ld %r12,xxx@toc@l(%r11)
3774 . addis %r2,%r2,off@ha
3775 . addi %r2,%r2,off@l
3776 . mtctr %r12
3777 . bctr
3778
3779 In cases where the "addis" instruction would add zero, the "addis" is
3780 omitted and following instructions modified slightly in some cases.
3781*/
3782
3783enum ppc_stub_type {
3784 ppc_stub_none,
3785 ppc_stub_long_branch,
3786 ppc_stub_long_branch_r2off,
3787 ppc_stub_plt_branch,
3788 ppc_stub_plt_branch_r2off,
3789 ppc_stub_plt_call,
3790 ppc_stub_plt_call_r2save,
3791 ppc_stub_global_entry
3792};
3793
3794struct ppc_stub_hash_entry {
3795
3796 /* Base hash table entry structure. */
3797 struct bfd_hash_entry root;
3798
3799 enum ppc_stub_type stub_type;
3800
3801 /* The stub section. */
3802 asection *stub_sec;
3803
3804 /* Offset within stub_sec of the beginning of this stub. */
3805 bfd_vma stub_offset;
3806
3807 /* Given the symbol's value and its section we can determine its final
3808 value when building the stubs (so the stub knows where to jump. */
3809 bfd_vma target_value;
3810 asection *target_section;
3811
3812 /* The symbol table entry, if any, that this was derived from. */
3813 struct ppc_link_hash_entry *h;
3814 struct plt_entry *plt_ent;
3815
3816 /* Where this stub is being called from, or, in the case of combined
3817 stub sections, the first input section in the group. */
3818 asection *id_sec;
3819
3820 /* Symbol st_other. */
3821 unsigned char other;
3822};
3823
3824struct ppc_branch_hash_entry {
3825
3826 /* Base hash table entry structure. */
3827 struct bfd_hash_entry root;
3828
3829 /* Offset within branch lookup table. */
3830 unsigned int offset;
3831
3832 /* Generation marker. */
3833 unsigned int iter;
3834};
3835
3836/* Used to track dynamic relocations for local symbols. */
3837struct ppc_dyn_relocs
3838{
3839 struct ppc_dyn_relocs *next;
3840
3841 /* The input section of the reloc. */
3842 asection *sec;
3843
3844 /* Total number of relocs copied for the input section. */
3845 unsigned int count : 31;
3846
3847 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3848 unsigned int ifunc : 1;
3849};
3850
3851struct ppc_link_hash_entry
3852{
3853 struct elf_link_hash_entry elf;
3854
3855 union {
3856 /* A pointer to the most recently used stub hash entry against this
3857 symbol. */
3858 struct ppc_stub_hash_entry *stub_cache;
3859
3860 /* A pointer to the next symbol starting with a '.' */
3861 struct ppc_link_hash_entry *next_dot_sym;
3862 } u;
3863
3864 /* Track dynamic relocs copied for this symbol. */
3865 struct elf_dyn_relocs *dyn_relocs;
3866
3867 /* Link between function code and descriptor symbols. */
3868 struct ppc_link_hash_entry *oh;
3869
3870 /* Flag function code and descriptor symbols. */
3871 unsigned int is_func:1;
3872 unsigned int is_func_descriptor:1;
3873 unsigned int fake:1;
3874
3875 /* Whether global opd/toc sym has been adjusted or not.
3876 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3877 should be set for all globals defined in any opd/toc section. */
3878 unsigned int adjust_done:1;
3879
3880 /* Set if we twiddled this symbol to weak at some stage. */
3881 unsigned int was_undefined:1;
3882
3883 /* Contexts in which symbol is used in the GOT (or TOC).
3884 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3885 corresponding relocs are encountered during check_relocs.
3886 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3887 indicate the corresponding GOT entry type is not needed.
3888 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3889 a TPREL one. We use a separate flag rather than setting TPREL
3890 just for convenience in distinguishing the two cases. */
3891#define TLS_GD 1 /* GD reloc. */
3892#define TLS_LD 2 /* LD reloc. */
3893#define TLS_TPREL 4 /* TPREL reloc, => IE. */
3894#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3895#define TLS_TLS 16 /* Any TLS reloc. */
3896#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3897#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3898#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3899 unsigned char tls_mask;
3900};
3901
3902/* ppc64 ELF linker hash table. */
3903
3904struct ppc_link_hash_table
3905{
3906 struct elf_link_hash_table elf;
3907
3908 /* The stub hash table. */
3909 struct bfd_hash_table stub_hash_table;
3910
3911 /* Another hash table for plt_branch stubs. */
3912 struct bfd_hash_table branch_hash_table;
3913
3914 /* Hash table for function prologue tocsave. */
3915 htab_t tocsave_htab;
3916
3917 /* Various options and other info passed from the linker. */
3918 struct ppc64_elf_params *params;
3919
3920 /* Array to keep track of which stub sections have been created, and
3921 information on stub grouping. */
3922 struct map_stub {
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* The stub section. */
3926 asection *stub_sec;
3927 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3928 bfd_vma toc_off;
3929 } *stub_group;
3930
3931 /* Temp used when calculating TOC pointers. */
3932 bfd_vma toc_curr;
3933 bfd *toc_bfd;
3934 asection *toc_first_sec;
3935
3936 /* Highest input section id. */
3937 int top_id;
3938
3939 /* Highest output section index. */
3940 int top_index;
3941
3942 /* Used when adding symbols. */
3943 struct ppc_link_hash_entry *dot_syms;
3944
3945 /* List of input sections for each output section. */
3946 asection **input_list;
3947
3948 /* Shortcuts to get to dynamic linker sections. */
3949 asection *dynbss;
3950 asection *relbss;
3951 asection *glink;
3952 asection *sfpr;
3953 asection *brlt;
3954 asection *relbrlt;
3955 asection *glink_eh_frame;
3956
3957 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3958 struct ppc_link_hash_entry *tls_get_addr;
3959 struct ppc_link_hash_entry *tls_get_addr_fd;
3960
3961 /* The size of reliplt used by got entry relocs. */
3962 bfd_size_type got_reli_size;
3963
3964 /* Statistics. */
3965 unsigned long stub_count[ppc_stub_global_entry];
3966
3967 /* Number of stubs against global syms. */
3968 unsigned long stub_globals;
3969
3970 /* Set if we're linking code with function descriptors. */
3971 unsigned int opd_abi:1;
3972
3973 /* Support for multiple toc sections. */
3974 unsigned int do_multi_toc:1;
3975 unsigned int multi_toc_needed:1;
3976 unsigned int second_toc_pass:1;
3977 unsigned int do_toc_opt:1;
3978
3979 /* Set on error. */
3980 unsigned int stub_error:1;
3981
3982 /* Temp used by ppc64_elf_before_check_relocs. */
3983 unsigned int twiddled_syms:1;
3984
3985 /* Incremented every time we size stubs. */
3986 unsigned int stub_iteration;
3987
3988 /* Small local sym cache. */
3989 struct sym_cache sym_cache;
3990};
3991
3992/* Rename some of the generic section flags to better document how they
3993 are used here. */
3994
3995/* Nonzero if this section has TLS related relocations. */
3996#define has_tls_reloc sec_flg0
3997
3998/* Nonzero if this section has a call to __tls_get_addr. */
3999#define has_tls_get_addr_call sec_flg1
4000
4001/* Nonzero if this section has any toc or got relocs. */
4002#define has_toc_reloc sec_flg2
4003
4004/* Nonzero if this section has a call to another section that uses
4005 the toc or got. */
4006#define makes_toc_func_call sec_flg3
4007
4008/* Recursion protection when determining above flag. */
4009#define call_check_in_progress sec_flg4
4010#define call_check_done sec_flg5
4011
4012/* Get the ppc64 ELF linker hash table from a link_info structure. */
4013
4014#define ppc_hash_table(p) \
4015 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4016 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4017
4018#define ppc_stub_hash_lookup(table, string, create, copy) \
4019 ((struct ppc_stub_hash_entry *) \
4020 bfd_hash_lookup ((table), (string), (create), (copy)))
4021
4022#define ppc_branch_hash_lookup(table, string, create, copy) \
4023 ((struct ppc_branch_hash_entry *) \
4024 bfd_hash_lookup ((table), (string), (create), (copy)))
4025
4026/* Create an entry in the stub hash table. */
4027
4028static struct bfd_hash_entry *
4029stub_hash_newfunc (struct bfd_hash_entry *entry,
4030 struct bfd_hash_table *table,
4031 const char *string)
4032{
4033 /* Allocate the structure if it has not already been allocated by a
4034 subclass. */
4035 if (entry == NULL)
4036 {
4037 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4038 if (entry == NULL)
4039 return entry;
4040 }
4041
4042 /* Call the allocation method of the superclass. */
4043 entry = bfd_hash_newfunc (entry, table, string);
4044 if (entry != NULL)
4045 {
4046 struct ppc_stub_hash_entry *eh;
4047
4048 /* Initialize the local fields. */
4049 eh = (struct ppc_stub_hash_entry *) entry;
4050 eh->stub_type = ppc_stub_none;
4051 eh->stub_sec = NULL;
4052 eh->stub_offset = 0;
4053 eh->target_value = 0;
4054 eh->target_section = NULL;
4055 eh->h = NULL;
4056 eh->plt_ent = NULL;
4057 eh->id_sec = NULL;
4058 eh->other = 0;
4059 }
4060
4061 return entry;
4062}
4063
4064/* Create an entry in the branch hash table. */
4065
4066static struct bfd_hash_entry *
4067branch_hash_newfunc (struct bfd_hash_entry *entry,
4068 struct bfd_hash_table *table,
4069 const char *string)
4070{
4071 /* Allocate the structure if it has not already been allocated by a
4072 subclass. */
4073 if (entry == NULL)
4074 {
4075 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4076 if (entry == NULL)
4077 return entry;
4078 }
4079
4080 /* Call the allocation method of the superclass. */
4081 entry = bfd_hash_newfunc (entry, table, string);
4082 if (entry != NULL)
4083 {
4084 struct ppc_branch_hash_entry *eh;
4085
4086 /* Initialize the local fields. */
4087 eh = (struct ppc_branch_hash_entry *) entry;
4088 eh->offset = 0;
4089 eh->iter = 0;
4090 }
4091
4092 return entry;
4093}
4094
4095/* Create an entry in a ppc64 ELF linker hash table. */
4096
4097static struct bfd_hash_entry *
4098link_hash_newfunc (struct bfd_hash_entry *entry,
4099 struct bfd_hash_table *table,
4100 const char *string)
4101{
4102 /* Allocate the structure if it has not already been allocated by a
4103 subclass. */
4104 if (entry == NULL)
4105 {
4106 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4107 if (entry == NULL)
4108 return entry;
4109 }
4110
4111 /* Call the allocation method of the superclass. */
4112 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4113 if (entry != NULL)
4114 {
4115 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4116
4117 memset (&eh->u.stub_cache, 0,
4118 (sizeof (struct ppc_link_hash_entry)
4119 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4120
4121 /* When making function calls, old ABI code references function entry
4122 points (dot symbols), while new ABI code references the function
4123 descriptor symbol. We need to make any combination of reference and
4124 definition work together, without breaking archive linking.
4125
4126 For a defined function "foo" and an undefined call to "bar":
4127 An old object defines "foo" and ".foo", references ".bar" (possibly
4128 "bar" too).
4129 A new object defines "foo" and references "bar".
4130
4131 A new object thus has no problem with its undefined symbols being
4132 satisfied by definitions in an old object. On the other hand, the
4133 old object won't have ".bar" satisfied by a new object.
4134
4135 Keep a list of newly added dot-symbols. */
4136
4137 if (string[0] == '.')
4138 {
4139 struct ppc_link_hash_table *htab;
4140
4141 htab = (struct ppc_link_hash_table *) table;
4142 eh->u.next_dot_sym = htab->dot_syms;
4143 htab->dot_syms = eh;
4144 }
4145 }
4146
4147 return entry;
4148}
4149
4150struct tocsave_entry {
4151 asection *sec;
4152 bfd_vma offset;
4153};
4154
4155static hashval_t
4156tocsave_htab_hash (const void *p)
4157{
4158 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4159 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4160}
4161
4162static int
4163tocsave_htab_eq (const void *p1, const void *p2)
4164{
4165 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4166 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4167 return e1->sec == e2->sec && e1->offset == e2->offset;
4168}
4169
4170/* Destroy a ppc64 ELF linker hash table. */
4171
4172static void
4173ppc64_elf_link_hash_table_free (bfd *obfd)
4174{
4175 struct ppc_link_hash_table *htab;
4176
4177 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4178 if (htab->tocsave_htab)
4179 htab_delete (htab->tocsave_htab);
4180 bfd_hash_table_free (&htab->branch_hash_table);
4181 bfd_hash_table_free (&htab->stub_hash_table);
4182 _bfd_elf_link_hash_table_free (obfd);
4183}
4184
4185/* Create a ppc64 ELF linker hash table. */
4186
4187static struct bfd_link_hash_table *
4188ppc64_elf_link_hash_table_create (bfd *abfd)
4189{
4190 struct ppc_link_hash_table *htab;
4191 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4192
4193 htab = bfd_zmalloc (amt);
4194 if (htab == NULL)
4195 return NULL;
4196
4197 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4198 sizeof (struct ppc_link_hash_entry),
4199 PPC64_ELF_DATA))
4200 {
4201 free (htab);
4202 return NULL;
4203 }
4204
4205 /* Init the stub hash table too. */
4206 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4207 sizeof (struct ppc_stub_hash_entry)))
4208 {
4209 _bfd_elf_link_hash_table_free (abfd);
4210 return NULL;
4211 }
4212
4213 /* And the branch hash table. */
4214 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4215 sizeof (struct ppc_branch_hash_entry)))
4216 {
4217 bfd_hash_table_free (&htab->stub_hash_table);
4218 _bfd_elf_link_hash_table_free (abfd);
4219 return NULL;
4220 }
4221
4222 htab->tocsave_htab = htab_try_create (1024,
4223 tocsave_htab_hash,
4224 tocsave_htab_eq,
4225 NULL);
4226 if (htab->tocsave_htab == NULL)
4227 {
4228 ppc64_elf_link_hash_table_free (abfd);
4229 return NULL;
4230 }
4231 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4232
4233 /* Initializing two fields of the union is just cosmetic. We really
4234 only care about glist, but when compiled on a 32-bit host the
4235 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4236 debugger inspection of these fields look nicer. */
4237 htab->elf.init_got_refcount.refcount = 0;
4238 htab->elf.init_got_refcount.glist = NULL;
4239 htab->elf.init_plt_refcount.refcount = 0;
4240 htab->elf.init_plt_refcount.glist = NULL;
4241 htab->elf.init_got_offset.offset = 0;
4242 htab->elf.init_got_offset.glist = NULL;
4243 htab->elf.init_plt_offset.offset = 0;
4244 htab->elf.init_plt_offset.glist = NULL;
4245
4246 return &htab->elf.root;
4247}
4248
4249/* Create sections for linker generated code. */
4250
4251static bfd_boolean
4252create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4253{
4254 struct ppc_link_hash_table *htab;
4255 flagword flags;
4256
4257 htab = ppc_hash_table (info);
4258
4259 /* Create .sfpr for code to save and restore fp regs. */
4260 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4261 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4262 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4263 flags);
4264 if (htab->sfpr == NULL
4265 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4266 return FALSE;
4267
4268 /* Create .glink for lazy dynamic linking support. */
4269 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4270 flags);
4271 if (htab->glink == NULL
4272 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4273 return FALSE;
4274
4275 if (!info->no_ld_generated_unwind_info)
4276 {
4277 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4278 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4279 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4280 ".eh_frame",
4281 flags);
4282 if (htab->glink_eh_frame == NULL
4283 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4284 return FALSE;
4285 }
4286
4287 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4288 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4289 if (htab->elf.iplt == NULL
4290 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4291 return FALSE;
4292
4293 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4294 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4295 htab->elf.irelplt
4296 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4297 if (htab->elf.irelplt == NULL
4298 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4299 return FALSE;
4300
4301 /* Create branch lookup table for plt_branch stubs. */
4302 flags = (SEC_ALLOC | SEC_LOAD
4303 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4304 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4305 flags);
4306 if (htab->brlt == NULL
4307 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4308 return FALSE;
4309
4310 if (!info->shared)
4311 return TRUE;
4312
4313 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4314 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4315 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4316 ".rela.branch_lt",
4317 flags);
4318 if (htab->relbrlt == NULL
4319 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4320 return FALSE;
4321
4322 return TRUE;
4323}
4324
4325/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4326
4327bfd_boolean
4328ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4329 struct ppc64_elf_params *params)
4330{
4331 struct ppc_link_hash_table *htab;
4332
4333 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4334
4335/* Always hook our dynamic sections into the first bfd, which is the
4336 linker created stub bfd. This ensures that the GOT header is at
4337 the start of the output TOC section. */
4338 htab = ppc_hash_table (info);
4339 if (htab == NULL)
4340 return FALSE;
4341 htab->elf.dynobj = params->stub_bfd;
4342 htab->params = params;
4343
4344 if (info->relocatable)
4345 return TRUE;
4346
4347 return create_linkage_sections (htab->elf.dynobj, info);
4348}
4349
4350/* Build a name for an entry in the stub hash table. */
4351
4352static char *
4353ppc_stub_name (const asection *input_section,
4354 const asection *sym_sec,
4355 const struct ppc_link_hash_entry *h,
4356 const Elf_Internal_Rela *rel)
4357{
4358 char *stub_name;
4359 ssize_t len;
4360
4361 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4362 offsets from a sym as a branch target? In fact, we could
4363 probably assume the addend is always zero. */
4364 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4365
4366 if (h)
4367 {
4368 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4369 stub_name = bfd_malloc (len);
4370 if (stub_name == NULL)
4371 return stub_name;
4372
4373 len = sprintf (stub_name, "%08x.%s+%x",
4374 input_section->id & 0xffffffff,
4375 h->elf.root.root.string,
4376 (int) rel->r_addend & 0xffffffff);
4377 }
4378 else
4379 {
4380 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4381 stub_name = bfd_malloc (len);
4382 if (stub_name == NULL)
4383 return stub_name;
4384
4385 len = sprintf (stub_name, "%08x.%x:%x+%x",
4386 input_section->id & 0xffffffff,
4387 sym_sec->id & 0xffffffff,
4388 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4389 (int) rel->r_addend & 0xffffffff);
4390 }
4391 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4392 stub_name[len - 2] = 0;
4393 return stub_name;
4394}
4395
4396/* Look up an entry in the stub hash. Stub entries are cached because
4397 creating the stub name takes a bit of time. */
4398
4399static struct ppc_stub_hash_entry *
4400ppc_get_stub_entry (const asection *input_section,
4401 const asection *sym_sec,
4402 struct ppc_link_hash_entry *h,
4403 const Elf_Internal_Rela *rel,
4404 struct ppc_link_hash_table *htab)
4405{
4406 struct ppc_stub_hash_entry *stub_entry;
4407 const asection *id_sec;
4408
4409 /* If this input section is part of a group of sections sharing one
4410 stub section, then use the id of the first section in the group.
4411 Stub names need to include a section id, as there may well be
4412 more than one stub used to reach say, printf, and we need to
4413 distinguish between them. */
4414 id_sec = htab->stub_group[input_section->id].link_sec;
4415
4416 if (h != NULL && h->u.stub_cache != NULL
4417 && h->u.stub_cache->h == h
4418 && h->u.stub_cache->id_sec == id_sec)
4419 {
4420 stub_entry = h->u.stub_cache;
4421 }
4422 else
4423 {
4424 char *stub_name;
4425
4426 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4427 if (stub_name == NULL)
4428 return NULL;
4429
4430 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4431 stub_name, FALSE, FALSE);
4432 if (h != NULL)
4433 h->u.stub_cache = stub_entry;
4434
4435 free (stub_name);
4436 }
4437
4438 return stub_entry;
4439}
4440
4441/* Add a new stub entry to the stub hash. Not all fields of the new
4442 stub entry are initialised. */
4443
4444static struct ppc_stub_hash_entry *
4445ppc_add_stub (const char *stub_name,
4446 asection *section,
4447 struct bfd_link_info *info)
4448{
4449 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4450 asection *link_sec;
4451 asection *stub_sec;
4452 struct ppc_stub_hash_entry *stub_entry;
4453
4454 link_sec = htab->stub_group[section->id].link_sec;
4455 stub_sec = htab->stub_group[section->id].stub_sec;
4456 if (stub_sec == NULL)
4457 {
4458 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4459 if (stub_sec == NULL)
4460 {
4461 size_t namelen;
4462 bfd_size_type len;
4463 char *s_name;
4464
4465 namelen = strlen (link_sec->name);
4466 len = namelen + sizeof (STUB_SUFFIX);
4467 s_name = bfd_alloc (htab->params->stub_bfd, len);
4468 if (s_name == NULL)
4469 return NULL;
4470
4471 memcpy (s_name, link_sec->name, namelen);
4472 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4473 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4474 if (stub_sec == NULL)
4475 return NULL;
4476 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4477 }
4478 htab->stub_group[section->id].stub_sec = stub_sec;
4479 }
4480
4481 /* Enter this entry into the linker stub hash table. */
4482 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4483 TRUE, FALSE);
4484 if (stub_entry == NULL)
4485 {
4486 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4487 section->owner, stub_name);
4488 return NULL;
4489 }
4490
4491 stub_entry->stub_sec = stub_sec;
4492 stub_entry->stub_offset = 0;
4493 stub_entry->id_sec = link_sec;
4494 return stub_entry;
4495}
4496
4497/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4498 not already done. */
4499
4500static bfd_boolean
4501create_got_section (bfd *abfd, struct bfd_link_info *info)
4502{
4503 asection *got, *relgot;
4504 flagword flags;
4505 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4506
4507 if (!is_ppc64_elf (abfd))
4508 return FALSE;
4509 if (htab == NULL)
4510 return FALSE;
4511
4512 if (!htab->elf.sgot
4513 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4514 return FALSE;
4515
4516 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4517 | SEC_LINKER_CREATED);
4518
4519 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4520 if (!got
4521 || !bfd_set_section_alignment (abfd, got, 3))
4522 return FALSE;
4523
4524 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4525 flags | SEC_READONLY);
4526 if (!relgot
4527 || ! bfd_set_section_alignment (abfd, relgot, 3))
4528 return FALSE;
4529
4530 ppc64_elf_tdata (abfd)->got = got;
4531 ppc64_elf_tdata (abfd)->relgot = relgot;
4532 return TRUE;
4533}
4534
4535/* Create the dynamic sections, and set up shortcuts. */
4536
4537static bfd_boolean
4538ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4539{
4540 struct ppc_link_hash_table *htab;
4541
4542 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4543 return FALSE;
4544
4545 htab = ppc_hash_table (info);
4546 if (htab == NULL)
4547 return FALSE;
4548
4549 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4550 if (!info->shared)
4551 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4552
4553 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4554 || (!info->shared && !htab->relbss))
4555 abort ();
4556
4557 return TRUE;
4558}
4559
4560/* Follow indirect and warning symbol links. */
4561
4562static inline struct bfd_link_hash_entry *
4563follow_link (struct bfd_link_hash_entry *h)
4564{
4565 while (h->type == bfd_link_hash_indirect
4566 || h->type == bfd_link_hash_warning)
4567 h = h->u.i.link;
4568 return h;
4569}
4570
4571static inline struct elf_link_hash_entry *
4572elf_follow_link (struct elf_link_hash_entry *h)
4573{
4574 return (struct elf_link_hash_entry *) follow_link (&h->root);
4575}
4576
4577static inline struct ppc_link_hash_entry *
4578ppc_follow_link (struct ppc_link_hash_entry *h)
4579{
4580 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4581}
4582
4583/* Merge PLT info on FROM with that on TO. */
4584
4585static void
4586move_plt_plist (struct ppc_link_hash_entry *from,
4587 struct ppc_link_hash_entry *to)
4588{
4589 if (from->elf.plt.plist != NULL)
4590 {
4591 if (to->elf.plt.plist != NULL)
4592 {
4593 struct plt_entry **entp;
4594 struct plt_entry *ent;
4595
4596 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4597 {
4598 struct plt_entry *dent;
4599
4600 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4601 if (dent->addend == ent->addend)
4602 {
4603 dent->plt.refcount += ent->plt.refcount;
4604 *entp = ent->next;
4605 break;
4606 }
4607 if (dent == NULL)
4608 entp = &ent->next;
4609 }
4610 *entp = to->elf.plt.plist;
4611 }
4612
4613 to->elf.plt.plist = from->elf.plt.plist;
4614 from->elf.plt.plist = NULL;
4615 }
4616}
4617
4618/* Copy the extra info we tack onto an elf_link_hash_entry. */
4619
4620static void
4621ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4622 struct elf_link_hash_entry *dir,
4623 struct elf_link_hash_entry *ind)
4624{
4625 struct ppc_link_hash_entry *edir, *eind;
4626
4627 edir = (struct ppc_link_hash_entry *) dir;
4628 eind = (struct ppc_link_hash_entry *) ind;
4629
4630 edir->is_func |= eind->is_func;
4631 edir->is_func_descriptor |= eind->is_func_descriptor;
4632 edir->tls_mask |= eind->tls_mask;
4633 if (eind->oh != NULL)
4634 edir->oh = ppc_follow_link (eind->oh);
4635
4636 /* If called to transfer flags for a weakdef during processing
4637 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4638 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4639 if (!(ELIMINATE_COPY_RELOCS
4640 && eind->elf.root.type != bfd_link_hash_indirect
4641 && edir->elf.dynamic_adjusted))
4642 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4643
4644 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4645 edir->elf.ref_regular |= eind->elf.ref_regular;
4646 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4647 edir->elf.needs_plt |= eind->elf.needs_plt;
4648 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4649
4650 /* Copy over any dynamic relocs we may have on the indirect sym. */
4651 if (eind->dyn_relocs != NULL)
4652 {
4653 if (edir->dyn_relocs != NULL)
4654 {
4655 struct elf_dyn_relocs **pp;
4656 struct elf_dyn_relocs *p;
4657
4658 /* Add reloc counts against the indirect sym to the direct sym
4659 list. Merge any entries against the same section. */
4660 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4661 {
4662 struct elf_dyn_relocs *q;
4663
4664 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4665 if (q->sec == p->sec)
4666 {
4667 q->pc_count += p->pc_count;
4668 q->count += p->count;
4669 *pp = p->next;
4670 break;
4671 }
4672 if (q == NULL)
4673 pp = &p->next;
4674 }
4675 *pp = edir->dyn_relocs;
4676 }
4677
4678 edir->dyn_relocs = eind->dyn_relocs;
4679 eind->dyn_relocs = NULL;
4680 }
4681
4682 /* If we were called to copy over info for a weak sym, that's all.
4683 You might think dyn_relocs need not be copied over; After all,
4684 both syms will be dynamic or both non-dynamic so we're just
4685 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4686 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4687 dyn_relocs in read-only sections, and it does so on what is the
4688 DIR sym here. */
4689 if (eind->elf.root.type != bfd_link_hash_indirect)
4690 return;
4691
4692 /* Copy over got entries that we may have already seen to the
4693 symbol which just became indirect. */
4694 if (eind->elf.got.glist != NULL)
4695 {
4696 if (edir->elf.got.glist != NULL)
4697 {
4698 struct got_entry **entp;
4699 struct got_entry *ent;
4700
4701 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4702 {
4703 struct got_entry *dent;
4704
4705 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4706 if (dent->addend == ent->addend
4707 && dent->owner == ent->owner
4708 && dent->tls_type == ent->tls_type)
4709 {
4710 dent->got.refcount += ent->got.refcount;
4711 *entp = ent->next;
4712 break;
4713 }
4714 if (dent == NULL)
4715 entp = &ent->next;
4716 }
4717 *entp = edir->elf.got.glist;
4718 }
4719
4720 edir->elf.got.glist = eind->elf.got.glist;
4721 eind->elf.got.glist = NULL;
4722 }
4723
4724 /* And plt entries. */
4725 move_plt_plist (eind, edir);
4726
4727 if (eind->elf.dynindx != -1)
4728 {
4729 if (edir->elf.dynindx != -1)
4730 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4731 edir->elf.dynstr_index);
4732 edir->elf.dynindx = eind->elf.dynindx;
4733 edir->elf.dynstr_index = eind->elf.dynstr_index;
4734 eind->elf.dynindx = -1;
4735 eind->elf.dynstr_index = 0;
4736 }
4737}
4738
4739/* Find the function descriptor hash entry from the given function code
4740 hash entry FH. Link the entries via their OH fields. */
4741
4742static struct ppc_link_hash_entry *
4743lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4744{
4745 struct ppc_link_hash_entry *fdh = fh->oh;
4746
4747 if (fdh == NULL)
4748 {
4749 const char *fd_name = fh->elf.root.root.string + 1;
4750
4751 fdh = (struct ppc_link_hash_entry *)
4752 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4753 if (fdh == NULL)
4754 return fdh;
4755
4756 fdh->is_func_descriptor = 1;
4757 fdh->oh = fh;
4758 fh->is_func = 1;
4759 fh->oh = fdh;
4760 }
4761
4762 return ppc_follow_link (fdh);
4763}
4764
4765/* Make a fake function descriptor sym for the code sym FH. */
4766
4767static struct ppc_link_hash_entry *
4768make_fdh (struct bfd_link_info *info,
4769 struct ppc_link_hash_entry *fh)
4770{
4771 bfd *abfd;
4772 asymbol *newsym;
4773 struct bfd_link_hash_entry *bh;
4774 struct ppc_link_hash_entry *fdh;
4775
4776 abfd = fh->elf.root.u.undef.abfd;
4777 newsym = bfd_make_empty_symbol (abfd);
4778 newsym->name = fh->elf.root.root.string + 1;
4779 newsym->section = bfd_und_section_ptr;
4780 newsym->value = 0;
4781 newsym->flags = BSF_WEAK;
4782
4783 bh = NULL;
4784 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4785 newsym->flags, newsym->section,
4786 newsym->value, NULL, FALSE, FALSE,
4787 &bh))
4788 return NULL;
4789
4790 fdh = (struct ppc_link_hash_entry *) bh;
4791 fdh->elf.non_elf = 0;
4792 fdh->fake = 1;
4793 fdh->is_func_descriptor = 1;
4794 fdh->oh = fh;
4795 fh->is_func = 1;
4796 fh->oh = fdh;
4797 return fdh;
4798}
4799
4800/* Fix function descriptor symbols defined in .opd sections to be
4801 function type. */
4802
4803static bfd_boolean
4804ppc64_elf_add_symbol_hook (bfd *ibfd,
4805 struct bfd_link_info *info,
4806 Elf_Internal_Sym *isym,
4807 const char **name,
4808 flagword *flags ATTRIBUTE_UNUSED,
4809 asection **sec,
4810 bfd_vma *value)
4811{
4812 if ((ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4813 || ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4814 && (ibfd->flags & DYNAMIC) == 0
4815 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4816 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4817
4818 if (*sec != NULL
4819 && strcmp ((*sec)->name, ".opd") == 0)
4820 {
4821 asection *code_sec;
4822
4823 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4824 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4825 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4826
4827 /* If the symbol is a function defined in .opd, and the function
4828 code is in a discarded group, let it appear to be undefined. */
4829 if (!info->relocatable
4830 && (*sec)->reloc_count != 0
4831 && opd_entry_value (*sec, *value, &code_sec, NULL,
4832 FALSE) != (bfd_vma) -1
4833 && discarded_section (code_sec))
4834 {
4835 *sec = bfd_und_section_ptr;
4836 isym->st_shndx = SHN_UNDEF;
4837 }
4838 }
4839 else if (*sec != NULL
4840 && strcmp ((*sec)->name, ".toc") == 0
4841 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4842 {
4843 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4844 if (htab != NULL)
4845 htab->params->object_in_toc = 1;
4846 }
4847
4848 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4849 {
4850 if (abiversion (ibfd) == 0)
4851 set_abiversion (ibfd, 2);
4852 else if (abiversion (ibfd) == 1)
4853 {
4854 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4855 " for ABI version 1\n"), name);
4856 bfd_set_error (bfd_error_bad_value);
4857 return FALSE;
4858 }
4859 }
4860
4861 return TRUE;
4862}
4863
4864/* Merge non-visibility st_other attributes: local entry point. */
4865
4866static void
4867ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4868 const Elf_Internal_Sym *isym,
4869 bfd_boolean definition,
4870 bfd_boolean dynamic)
4871{
4872 if (definition && !dynamic)
4873 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4874 | ELF_ST_VISIBILITY (h->other));
4875}
4876
4877/* This function makes an old ABI object reference to ".bar" cause the
4878 inclusion of a new ABI object archive that defines "bar".
4879 NAME is a symbol defined in an archive. Return a symbol in the hash
4880 table that might be satisfied by the archive symbols. */
4881
4882static struct elf_link_hash_entry *
4883ppc64_elf_archive_symbol_lookup (bfd *abfd,
4884 struct bfd_link_info *info,
4885 const char *name)
4886{
4887 struct elf_link_hash_entry *h;
4888 char *dot_name;
4889 size_t len;
4890
4891 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4892 if (h != NULL
4893 /* Don't return this sym if it is a fake function descriptor
4894 created by add_symbol_adjust. */
4895 && !(h->root.type == bfd_link_hash_undefweak
4896 && ((struct ppc_link_hash_entry *) h)->fake))
4897 return h;
4898
4899 if (name[0] == '.')
4900 return h;
4901
4902 len = strlen (name);
4903 dot_name = bfd_alloc (abfd, len + 2);
4904 if (dot_name == NULL)
4905 return (struct elf_link_hash_entry *) 0 - 1;
4906 dot_name[0] = '.';
4907 memcpy (dot_name + 1, name, len + 1);
4908 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4909 bfd_release (abfd, dot_name);
4910 return h;
4911}
4912
4913/* This function satisfies all old ABI object references to ".bar" if a
4914 new ABI object defines "bar". Well, at least, undefined dot symbols
4915 are made weak. This stops later archive searches from including an
4916 object if we already have a function descriptor definition. It also
4917 prevents the linker complaining about undefined symbols.
4918 We also check and correct mismatched symbol visibility here. The
4919 most restrictive visibility of the function descriptor and the
4920 function entry symbol is used. */
4921
4922static bfd_boolean
4923add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4924{
4925 struct ppc_link_hash_table *htab;
4926 struct ppc_link_hash_entry *fdh;
4927
4928 if (eh->elf.root.type == bfd_link_hash_indirect)
4929 return TRUE;
4930
4931 if (eh->elf.root.type == bfd_link_hash_warning)
4932 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4933
4934 if (eh->elf.root.root.string[0] != '.')
4935 abort ();
4936
4937 htab = ppc_hash_table (info);
4938 if (htab == NULL)
4939 return FALSE;
4940
4941 fdh = lookup_fdh (eh, htab);
4942 if (fdh == NULL)
4943 {
4944 if (!info->relocatable
4945 && (eh->elf.root.type == bfd_link_hash_undefined
4946 || eh->elf.root.type == bfd_link_hash_undefweak)
4947 && eh->elf.ref_regular)
4948 {
4949 /* Make an undefweak function descriptor sym, which is enough to
4950 pull in an --as-needed shared lib, but won't cause link
4951 errors. Archives are handled elsewhere. */
4952 fdh = make_fdh (info, eh);
4953 if (fdh == NULL)
4954 return FALSE;
4955 fdh->elf.ref_regular = 1;
4956 }
4957 }
4958 else
4959 {
4960 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4961 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4962 if (entry_vis < descr_vis)
4963 fdh->elf.other += entry_vis - descr_vis;
4964 else if (entry_vis > descr_vis)
4965 eh->elf.other += descr_vis - entry_vis;
4966
4967 if ((fdh->elf.root.type == bfd_link_hash_defined
4968 || fdh->elf.root.type == bfd_link_hash_defweak)
4969 && eh->elf.root.type == bfd_link_hash_undefined)
4970 {
4971 eh->elf.root.type = bfd_link_hash_undefweak;
4972 eh->was_undefined = 1;
4973 htab->twiddled_syms = 1;
4974 }
4975 }
4976
4977 return TRUE;
4978}
4979
4980/* Set up opd section info and abiversion for IBFD, and process list
4981 of dot-symbols we made in link_hash_newfunc. */
4982
4983static bfd_boolean
4984ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
4985{
4986 struct ppc_link_hash_table *htab;
4987 struct ppc_link_hash_entry **p, *eh;
4988 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
4989
4990 if (opd != NULL && opd->size != 0)
4991 {
4992 if (abiversion (ibfd) == 0)
4993 set_abiversion (ibfd, 1);
4994 else if (abiversion (ibfd) == 2)
4995 {
4996 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
4997 " version %d\n"),
4998 ibfd, abiversion (ibfd));
4999 bfd_set_error (bfd_error_bad_value);
5000 return FALSE;
5001 }
5002
5003 if ((ibfd->flags & DYNAMIC) == 0
5004 && (opd->flags & SEC_RELOC) != 0
5005 && opd->reloc_count != 0
5006 && !bfd_is_abs_section (opd->output_section))
5007 {
5008 /* Garbage collection needs some extra help with .opd sections.
5009 We don't want to necessarily keep everything referenced by
5010 relocs in .opd, as that would keep all functions. Instead,
5011 if we reference an .opd symbol (a function descriptor), we
5012 want to keep the function code symbol's section. This is
5013 easy for global symbols, but for local syms we need to keep
5014 information about the associated function section. */
5015 bfd_size_type amt;
5016 asection **opd_sym_map;
5017
5018 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5019 opd_sym_map = bfd_zalloc (ibfd, amt);
5020 if (opd_sym_map == NULL)
5021 return FALSE;
5022 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5023 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5024 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5025 }
5026 }
5027
5028 if (!is_ppc64_elf (info->output_bfd))
5029 return TRUE;
5030 htab = ppc_hash_table (info);
5031 if (htab == NULL)
5032 return FALSE;
5033
5034 /* For input files without an explicit abiversion in e_flags
5035 we should have flagged any with symbol st_other bits set
5036 as ELFv1 and above flagged those with .opd as ELFv2.
5037 Set the output abiversion if not yet set, and for any input
5038 still ambiguous, take its abiversion from the output.
5039 Differences in ABI are reported later. */
5040 if (abiversion (info->output_bfd) == 0)
5041 set_abiversion (info->output_bfd, abiversion (ibfd));
5042 else if (abiversion (ibfd) == 0)
5043 set_abiversion (ibfd, abiversion (info->output_bfd));
5044
5045 p = &htab->dot_syms;
5046 while ((eh = *p) != NULL)
5047 {
5048 *p = NULL;
5049 if (&eh->elf == htab->elf.hgot)
5050 ;
5051 else if (htab->elf.hgot == NULL
5052 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5053 htab->elf.hgot = &eh->elf;
5054 else if (!add_symbol_adjust (eh, info))
5055 return FALSE;
5056 p = &eh->u.next_dot_sym;
5057 }
5058
5059 /* Clear the list for non-ppc64 input files. */
5060 p = &htab->dot_syms;
5061 while ((eh = *p) != NULL)
5062 {
5063 *p = NULL;
5064 p = &eh->u.next_dot_sym;
5065 }
5066
5067 /* We need to fix the undefs list for any syms we have twiddled to
5068 undef_weak. */
5069 if (htab->twiddled_syms)
5070 {
5071 bfd_link_repair_undef_list (&htab->elf.root);
5072 htab->twiddled_syms = 0;
5073 }
5074 return TRUE;
5075}
5076
5077/* Undo hash table changes when an --as-needed input file is determined
5078 not to be needed. */
5079
5080static bfd_boolean
5081ppc64_elf_notice_as_needed (bfd *ibfd,
5082 struct bfd_link_info *info,
5083 enum notice_asneeded_action act)
5084{
5085 if (act == notice_not_needed)
5086 {
5087 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5088
5089 if (htab == NULL)
5090 return FALSE;
5091
5092 htab->dot_syms = NULL;
5093 }
5094 return _bfd_elf_notice_as_needed (ibfd, info, act);
5095}
5096
5097/* If --just-symbols against a final linked binary, then assume we need
5098 toc adjusting stubs when calling functions defined there. */
5099
5100static void
5101ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5102{
5103 if ((sec->flags & SEC_CODE) != 0
5104 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5105 && is_ppc64_elf (sec->owner))
5106 {
5107 if (abiversion (sec->owner) >= 2
5108 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5109 sec->has_toc_reloc = 1;
5110 }
5111 _bfd_elf_link_just_syms (sec, info);
5112}
5113
5114static struct plt_entry **
5115update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5116 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5117{
5118 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5119 struct plt_entry **local_plt;
5120 unsigned char *local_got_tls_masks;
5121
5122 if (local_got_ents == NULL)
5123 {
5124 bfd_size_type size = symtab_hdr->sh_info;
5125
5126 size *= (sizeof (*local_got_ents)
5127 + sizeof (*local_plt)
5128 + sizeof (*local_got_tls_masks));
5129 local_got_ents = bfd_zalloc (abfd, size);
5130 if (local_got_ents == NULL)
5131 return NULL;
5132 elf_local_got_ents (abfd) = local_got_ents;
5133 }
5134
5135 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5136 {
5137 struct got_entry *ent;
5138
5139 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5140 if (ent->addend == r_addend
5141 && ent->owner == abfd
5142 && ent->tls_type == tls_type)
5143 break;
5144 if (ent == NULL)
5145 {
5146 bfd_size_type amt = sizeof (*ent);
5147 ent = bfd_alloc (abfd, amt);
5148 if (ent == NULL)
5149 return FALSE;
5150 ent->next = local_got_ents[r_symndx];
5151 ent->addend = r_addend;
5152 ent->owner = abfd;
5153 ent->tls_type = tls_type;
5154 ent->is_indirect = FALSE;
5155 ent->got.refcount = 0;
5156 local_got_ents[r_symndx] = ent;
5157 }
5158 ent->got.refcount += 1;
5159 }
5160
5161 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5162 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5163 local_got_tls_masks[r_symndx] |= tls_type;
5164
5165 return local_plt + r_symndx;
5166}
5167
5168static bfd_boolean
5169update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5170{
5171 struct plt_entry *ent;
5172
5173 for (ent = *plist; ent != NULL; ent = ent->next)
5174 if (ent->addend == addend)
5175 break;
5176 if (ent == NULL)
5177 {
5178 bfd_size_type amt = sizeof (*ent);
5179 ent = bfd_alloc (abfd, amt);
5180 if (ent == NULL)
5181 return FALSE;
5182 ent->next = *plist;
5183 ent->addend = addend;
5184 ent->plt.refcount = 0;
5185 *plist = ent;
5186 }
5187 ent->plt.refcount += 1;
5188 return TRUE;
5189}
5190
5191static bfd_boolean
5192is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5193{
5194 return (r_type == R_PPC64_REL24
5195 || r_type == R_PPC64_REL14
5196 || r_type == R_PPC64_REL14_BRTAKEN
5197 || r_type == R_PPC64_REL14_BRNTAKEN
5198 || r_type == R_PPC64_ADDR24
5199 || r_type == R_PPC64_ADDR14
5200 || r_type == R_PPC64_ADDR14_BRTAKEN
5201 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5202}
5203
5204/* Look through the relocs for a section during the first phase, and
5205 calculate needed space in the global offset table, procedure
5206 linkage table, and dynamic reloc sections. */
5207
5208static bfd_boolean
5209ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5210 asection *sec, const Elf_Internal_Rela *relocs)
5211{
5212 struct ppc_link_hash_table *htab;
5213 Elf_Internal_Shdr *symtab_hdr;
5214 struct elf_link_hash_entry **sym_hashes;
5215 const Elf_Internal_Rela *rel;
5216 const Elf_Internal_Rela *rel_end;
5217 asection *sreloc;
5218 asection **opd_sym_map;
5219 struct elf_link_hash_entry *tga, *dottga;
5220
5221 if (info->relocatable)
5222 return TRUE;
5223
5224 /* Don't do anything special with non-loaded, non-alloced sections.
5225 In particular, any relocs in such sections should not affect GOT
5226 and PLT reference counting (ie. we don't allow them to create GOT
5227 or PLT entries), there's no possibility or desire to optimize TLS
5228 relocs, and there's not much point in propagating relocs to shared
5229 libs that the dynamic linker won't relocate. */
5230 if ((sec->flags & SEC_ALLOC) == 0)
5231 return TRUE;
5232
5233 BFD_ASSERT (is_ppc64_elf (abfd));
5234
5235 htab = ppc_hash_table (info);
5236 if (htab == NULL)
5237 return FALSE;
5238
5239 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5240 FALSE, FALSE, TRUE);
5241 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5242 FALSE, FALSE, TRUE);
5243 symtab_hdr = &elf_symtab_hdr (abfd);
5244 sym_hashes = elf_sym_hashes (abfd);
5245 sreloc = NULL;
5246 opd_sym_map = NULL;
5247 if (ppc64_elf_section_data (sec) != NULL
5248 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5249 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5250
5251 rel_end = relocs + sec->reloc_count;
5252 for (rel = relocs; rel < rel_end; rel++)
5253 {
5254 unsigned long r_symndx;
5255 struct elf_link_hash_entry *h;
5256 enum elf_ppc64_reloc_type r_type;
5257 int tls_type;
5258 struct _ppc64_elf_section_data *ppc64_sec;
5259 struct plt_entry **ifunc;
5260
5261 r_symndx = ELF64_R_SYM (rel->r_info);
5262 if (r_symndx < symtab_hdr->sh_info)
5263 h = NULL;
5264 else
5265 {
5266 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5267 h = elf_follow_link (h);
5268
5269 /* PR15323, ref flags aren't set for references in the same
5270 object. */
5271 h->root.non_ir_ref = 1;
5272
5273 if (h == htab->elf.hgot)
5274 sec->has_toc_reloc = 1;
5275 }
5276
5277 tls_type = 0;
5278 ifunc = NULL;
5279 if (h != NULL)
5280 {
5281 if (h->type == STT_GNU_IFUNC)
5282 {
5283 h->needs_plt = 1;
5284 ifunc = &h->plt.plist;
5285 }
5286 }
5287 else
5288 {
5289 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5290 abfd, r_symndx);
5291 if (isym == NULL)
5292 return FALSE;
5293
5294 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5295 {
5296 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5297 rel->r_addend, PLT_IFUNC);
5298 if (ifunc == NULL)
5299 return FALSE;
5300 }
5301 }
5302 r_type = ELF64_R_TYPE (rel->r_info);
5303 if (is_branch_reloc (r_type))
5304 {
5305 if (h != NULL && (h == tga || h == dottga))
5306 {
5307 if (rel != relocs
5308 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5309 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5310 /* We have a new-style __tls_get_addr call with a marker
5311 reloc. */
5312 ;
5313 else
5314 /* Mark this section as having an old-style call. */
5315 sec->has_tls_get_addr_call = 1;
5316 }
5317
5318 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5319 if (ifunc != NULL
5320 && !update_plt_info (abfd, ifunc, rel->r_addend))
5321 return FALSE;
5322 }
5323
5324 switch (r_type)
5325 {
5326 case R_PPC64_TLSGD:
5327 case R_PPC64_TLSLD:
5328 /* These special tls relocs tie a call to __tls_get_addr with
5329 its parameter symbol. */
5330 break;
5331
5332 case R_PPC64_GOT_TLSLD16:
5333 case R_PPC64_GOT_TLSLD16_LO:
5334 case R_PPC64_GOT_TLSLD16_HI:
5335 case R_PPC64_GOT_TLSLD16_HA:
5336 tls_type = TLS_TLS | TLS_LD;
5337 goto dogottls;
5338
5339 case R_PPC64_GOT_TLSGD16:
5340 case R_PPC64_GOT_TLSGD16_LO:
5341 case R_PPC64_GOT_TLSGD16_HI:
5342 case R_PPC64_GOT_TLSGD16_HA:
5343 tls_type = TLS_TLS | TLS_GD;
5344 goto dogottls;
5345
5346 case R_PPC64_GOT_TPREL16_DS:
5347 case R_PPC64_GOT_TPREL16_LO_DS:
5348 case R_PPC64_GOT_TPREL16_HI:
5349 case R_PPC64_GOT_TPREL16_HA:
5350 if (info->shared)
5351 info->flags |= DF_STATIC_TLS;
5352 tls_type = TLS_TLS | TLS_TPREL;
5353 goto dogottls;
5354
5355 case R_PPC64_GOT_DTPREL16_DS:
5356 case R_PPC64_GOT_DTPREL16_LO_DS:
5357 case R_PPC64_GOT_DTPREL16_HI:
5358 case R_PPC64_GOT_DTPREL16_HA:
5359 tls_type = TLS_TLS | TLS_DTPREL;
5360 dogottls:
5361 sec->has_tls_reloc = 1;
5362 /* Fall thru */
5363
5364 case R_PPC64_GOT16:
5365 case R_PPC64_GOT16_DS:
5366 case R_PPC64_GOT16_HA:
5367 case R_PPC64_GOT16_HI:
5368 case R_PPC64_GOT16_LO:
5369 case R_PPC64_GOT16_LO_DS:
5370 /* This symbol requires a global offset table entry. */
5371 sec->has_toc_reloc = 1;
5372 if (r_type == R_PPC64_GOT_TLSLD16
5373 || r_type == R_PPC64_GOT_TLSGD16
5374 || r_type == R_PPC64_GOT_TPREL16_DS
5375 || r_type == R_PPC64_GOT_DTPREL16_DS
5376 || r_type == R_PPC64_GOT16
5377 || r_type == R_PPC64_GOT16_DS)
5378 {
5379 htab->do_multi_toc = 1;
5380 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5381 }
5382
5383 if (ppc64_elf_tdata (abfd)->got == NULL
5384 && !create_got_section (abfd, info))
5385 return FALSE;
5386
5387 if (h != NULL)
5388 {
5389 struct ppc_link_hash_entry *eh;
5390 struct got_entry *ent;
5391
5392 eh = (struct ppc_link_hash_entry *) h;
5393 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5394 if (ent->addend == rel->r_addend
5395 && ent->owner == abfd
5396 && ent->tls_type == tls_type)
5397 break;
5398 if (ent == NULL)
5399 {
5400 bfd_size_type amt = sizeof (*ent);
5401 ent = bfd_alloc (abfd, amt);
5402 if (ent == NULL)
5403 return FALSE;
5404 ent->next = eh->elf.got.glist;
5405 ent->addend = rel->r_addend;
5406 ent->owner = abfd;
5407 ent->tls_type = tls_type;
5408 ent->is_indirect = FALSE;
5409 ent->got.refcount = 0;
5410 eh->elf.got.glist = ent;
5411 }
5412 ent->got.refcount += 1;
5413 eh->tls_mask |= tls_type;
5414 }
5415 else
5416 /* This is a global offset table entry for a local symbol. */
5417 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5418 rel->r_addend, tls_type))
5419 return FALSE;
5420
5421 /* We may also need a plt entry if the symbol turns out to be
5422 an ifunc. */
5423 if (h != NULL && !info->shared && abiversion (abfd) != 1)
5424 {
5425 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5426 return FALSE;
5427 }
5428 break;
5429
5430 case R_PPC64_PLT16_HA:
5431 case R_PPC64_PLT16_HI:
5432 case R_PPC64_PLT16_LO:
5433 case R_PPC64_PLT32:
5434 case R_PPC64_PLT64:
5435 /* This symbol requires a procedure linkage table entry. We
5436 actually build the entry in adjust_dynamic_symbol,
5437 because this might be a case of linking PIC code without
5438 linking in any dynamic objects, in which case we don't
5439 need to generate a procedure linkage table after all. */
5440 if (h == NULL)
5441 {
5442 /* It does not make sense to have a procedure linkage
5443 table entry for a local symbol. */
5444 bfd_set_error (bfd_error_bad_value);
5445 return FALSE;
5446 }
5447 else
5448 {
5449 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5450 return FALSE;
5451 h->needs_plt = 1;
5452 if (h->root.root.string[0] == '.'
5453 && h->root.root.string[1] != '\0')
5454 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5455 }
5456 break;
5457
5458 /* The following relocations don't need to propagate the
5459 relocation if linking a shared object since they are
5460 section relative. */
5461 case R_PPC64_SECTOFF:
5462 case R_PPC64_SECTOFF_LO:
5463 case R_PPC64_SECTOFF_HI:
5464 case R_PPC64_SECTOFF_HA:
5465 case R_PPC64_SECTOFF_DS:
5466 case R_PPC64_SECTOFF_LO_DS:
5467 case R_PPC64_DTPREL16:
5468 case R_PPC64_DTPREL16_LO:
5469 case R_PPC64_DTPREL16_HI:
5470 case R_PPC64_DTPREL16_HA:
5471 case R_PPC64_DTPREL16_DS:
5472 case R_PPC64_DTPREL16_LO_DS:
5473 case R_PPC64_DTPREL16_HIGH:
5474 case R_PPC64_DTPREL16_HIGHA:
5475 case R_PPC64_DTPREL16_HIGHER:
5476 case R_PPC64_DTPREL16_HIGHERA:
5477 case R_PPC64_DTPREL16_HIGHEST:
5478 case R_PPC64_DTPREL16_HIGHESTA:
5479 break;
5480
5481 /* Nor do these. */
5482 case R_PPC64_REL16:
5483 case R_PPC64_REL16_LO:
5484 case R_PPC64_REL16_HI:
5485 case R_PPC64_REL16_HA:
5486 break;
5487
5488 /* Not supported as a dynamic relocation. */
5489 case R_PPC64_ADDR64_LOCAL:
5490 if (info->shared)
5491 {
5492 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5493 ppc_howto_init ();
5494 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5495 "in shared libraries and PIEs.\n"),
5496 abfd, sec, rel->r_offset,
5497 ppc64_elf_howto_table[r_type]->name);
5498 bfd_set_error (bfd_error_bad_value);
5499 return FALSE;
5500 }
5501 break;
5502
5503 case R_PPC64_TOC16:
5504 case R_PPC64_TOC16_DS:
5505 htab->do_multi_toc = 1;
5506 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5507 case R_PPC64_TOC16_LO:
5508 case R_PPC64_TOC16_HI:
5509 case R_PPC64_TOC16_HA:
5510 case R_PPC64_TOC16_LO_DS:
5511 sec->has_toc_reloc = 1;
5512 break;
5513
5514 /* This relocation describes the C++ object vtable hierarchy.
5515 Reconstruct it for later use during GC. */
5516 case R_PPC64_GNU_VTINHERIT:
5517 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5518 return FALSE;
5519 break;
5520
5521 /* This relocation describes which C++ vtable entries are actually
5522 used. Record for later use during GC. */
5523 case R_PPC64_GNU_VTENTRY:
5524 BFD_ASSERT (h != NULL);
5525 if (h != NULL
5526 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5527 return FALSE;
5528 break;
5529
5530 case R_PPC64_REL14:
5531 case R_PPC64_REL14_BRTAKEN:
5532 case R_PPC64_REL14_BRNTAKEN:
5533 {
5534 asection *dest = NULL;
5535
5536 /* Heuristic: If jumping outside our section, chances are
5537 we are going to need a stub. */
5538 if (h != NULL)
5539 {
5540 /* If the sym is weak it may be overridden later, so
5541 don't assume we know where a weak sym lives. */
5542 if (h->root.type == bfd_link_hash_defined)
5543 dest = h->root.u.def.section;
5544 }
5545 else
5546 {
5547 Elf_Internal_Sym *isym;
5548
5549 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5550 abfd, r_symndx);
5551 if (isym == NULL)
5552 return FALSE;
5553
5554 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5555 }
5556
5557 if (dest != sec)
5558 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5559 }
5560 /* Fall through. */
5561
5562 case R_PPC64_REL24:
5563 if (h != NULL && ifunc == NULL)
5564 {
5565 /* We may need a .plt entry if the function this reloc
5566 refers to is in a shared lib. */
5567 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5568 return FALSE;
5569 h->needs_plt = 1;
5570 if (h->root.root.string[0] == '.'
5571 && h->root.root.string[1] != '\0')
5572 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5573 if (h == tga || h == dottga)
5574 sec->has_tls_reloc = 1;
5575 }
5576 break;
5577
5578 case R_PPC64_TPREL64:
5579 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5580 if (info->shared)
5581 info->flags |= DF_STATIC_TLS;
5582 goto dotlstoc;
5583
5584 case R_PPC64_DTPMOD64:
5585 if (rel + 1 < rel_end
5586 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5587 && rel[1].r_offset == rel->r_offset + 8)
5588 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5589 else
5590 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5591 goto dotlstoc;
5592
5593 case R_PPC64_DTPREL64:
5594 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5595 if (rel != relocs
5596 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5597 && rel[-1].r_offset == rel->r_offset - 8)
5598 /* This is the second reloc of a dtpmod, dtprel pair.
5599 Don't mark with TLS_DTPREL. */
5600 goto dodyn;
5601
5602 dotlstoc:
5603 sec->has_tls_reloc = 1;
5604 if (h != NULL)
5605 {
5606 struct ppc_link_hash_entry *eh;
5607 eh = (struct ppc_link_hash_entry *) h;
5608 eh->tls_mask |= tls_type;
5609 }
5610 else
5611 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5612 rel->r_addend, tls_type))
5613 return FALSE;
5614
5615 ppc64_sec = ppc64_elf_section_data (sec);
5616 if (ppc64_sec->sec_type != sec_toc)
5617 {
5618 bfd_size_type amt;
5619
5620 /* One extra to simplify get_tls_mask. */
5621 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5622 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5623 if (ppc64_sec->u.toc.symndx == NULL)
5624 return FALSE;
5625 amt = sec->size * sizeof (bfd_vma) / 8;
5626 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5627 if (ppc64_sec->u.toc.add == NULL)
5628 return FALSE;
5629 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5630 ppc64_sec->sec_type = sec_toc;
5631 }
5632 BFD_ASSERT (rel->r_offset % 8 == 0);
5633 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5634 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5635
5636 /* Mark the second slot of a GD or LD entry.
5637 -1 to indicate GD and -2 to indicate LD. */
5638 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5639 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5640 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5641 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5642 goto dodyn;
5643
5644 case R_PPC64_TPREL16:
5645 case R_PPC64_TPREL16_LO:
5646 case R_PPC64_TPREL16_HI:
5647 case R_PPC64_TPREL16_HA:
5648 case R_PPC64_TPREL16_DS:
5649 case R_PPC64_TPREL16_LO_DS:
5650 case R_PPC64_TPREL16_HIGH:
5651 case R_PPC64_TPREL16_HIGHA:
5652 case R_PPC64_TPREL16_HIGHER:
5653 case R_PPC64_TPREL16_HIGHERA:
5654 case R_PPC64_TPREL16_HIGHEST:
5655 case R_PPC64_TPREL16_HIGHESTA:
5656 if (info->shared)
5657 {
5658 info->flags |= DF_STATIC_TLS;
5659 goto dodyn;
5660 }
5661 break;
5662
5663 case R_PPC64_ADDR64:
5664 if (opd_sym_map != NULL
5665 && rel + 1 < rel_end
5666 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5667 {
5668 if (h != NULL)
5669 {
5670 if (h->root.root.string[0] == '.'
5671 && h->root.root.string[1] != 0
5672 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5673 ;
5674 else
5675 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5676 }
5677 else
5678 {
5679 asection *s;
5680 Elf_Internal_Sym *isym;
5681
5682 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5683 abfd, r_symndx);
5684 if (isym == NULL)
5685 return FALSE;
5686
5687 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5688 if (s != NULL && s != sec)
5689 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5690 }
5691 }
5692 /* Fall through. */
5693
5694 case R_PPC64_ADDR16:
5695 case R_PPC64_ADDR16_DS:
5696 case R_PPC64_ADDR16_HA:
5697 case R_PPC64_ADDR16_HI:
5698 case R_PPC64_ADDR16_HIGH:
5699 case R_PPC64_ADDR16_HIGHA:
5700 case R_PPC64_ADDR16_HIGHER:
5701 case R_PPC64_ADDR16_HIGHERA:
5702 case R_PPC64_ADDR16_HIGHEST:
5703 case R_PPC64_ADDR16_HIGHESTA:
5704 case R_PPC64_ADDR16_LO:
5705 case R_PPC64_ADDR16_LO_DS:
5706 if (h != NULL && !info->shared && abiversion (abfd) != 1
5707 && rel->r_addend == 0)
5708 {
5709 /* We may need a .plt entry if this reloc refers to a
5710 function in a shared lib. */
5711 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5712 return FALSE;
5713 h->pointer_equality_needed = 1;
5714 }
5715 /* Fall through. */
5716
5717 case R_PPC64_REL30:
5718 case R_PPC64_REL32:
5719 case R_PPC64_REL64:
5720 case R_PPC64_ADDR14:
5721 case R_PPC64_ADDR14_BRNTAKEN:
5722 case R_PPC64_ADDR14_BRTAKEN:
5723 case R_PPC64_ADDR24:
5724 case R_PPC64_ADDR32:
5725 case R_PPC64_UADDR16:
5726 case R_PPC64_UADDR32:
5727 case R_PPC64_UADDR64:
5728 case R_PPC64_TOC:
5729 if (h != NULL && !info->shared)
5730 /* We may need a copy reloc. */
5731 h->non_got_ref = 1;
5732
5733 /* Don't propagate .opd relocs. */
5734 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5735 break;
5736
5737 /* If we are creating a shared library, and this is a reloc
5738 against a global symbol, or a non PC relative reloc
5739 against a local symbol, then we need to copy the reloc
5740 into the shared library. However, if we are linking with
5741 -Bsymbolic, we do not need to copy a reloc against a
5742 global symbol which is defined in an object we are
5743 including in the link (i.e., DEF_REGULAR is set). At
5744 this point we have not seen all the input files, so it is
5745 possible that DEF_REGULAR is not set now but will be set
5746 later (it is never cleared). In case of a weak definition,
5747 DEF_REGULAR may be cleared later by a strong definition in
5748 a shared library. We account for that possibility below by
5749 storing information in the dyn_relocs field of the hash
5750 table entry. A similar situation occurs when creating
5751 shared libraries and symbol visibility changes render the
5752 symbol local.
5753
5754 If on the other hand, we are creating an executable, we
5755 may need to keep relocations for symbols satisfied by a
5756 dynamic library if we manage to avoid copy relocs for the
5757 symbol. */
5758 dodyn:
5759 if ((info->shared
5760 && (must_be_dyn_reloc (info, r_type)
5761 || (h != NULL
5762 && (!SYMBOLIC_BIND (info, h)
5763 || h->root.type == bfd_link_hash_defweak
5764 || !h->def_regular))))
5765 || (ELIMINATE_COPY_RELOCS
5766 && !info->shared
5767 && h != NULL
5768 && (h->root.type == bfd_link_hash_defweak
5769 || !h->def_regular))
5770 || (!info->shared
5771 && ifunc != NULL))
5772 {
5773 /* We must copy these reloc types into the output file.
5774 Create a reloc section in dynobj and make room for
5775 this reloc. */
5776 if (sreloc == NULL)
5777 {
5778 sreloc = _bfd_elf_make_dynamic_reloc_section
5779 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5780
5781 if (sreloc == NULL)
5782 return FALSE;
5783 }
5784
5785 /* If this is a global symbol, we count the number of
5786 relocations we need for this symbol. */
5787 if (h != NULL)
5788 {
5789 struct elf_dyn_relocs *p;
5790 struct elf_dyn_relocs **head;
5791
5792 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5793 p = *head;
5794 if (p == NULL || p->sec != sec)
5795 {
5796 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5797 if (p == NULL)
5798 return FALSE;
5799 p->next = *head;
5800 *head = p;
5801 p->sec = sec;
5802 p->count = 0;
5803 p->pc_count = 0;
5804 }
5805 p->count += 1;
5806 if (!must_be_dyn_reloc (info, r_type))
5807 p->pc_count += 1;
5808 }
5809 else
5810 {
5811 /* Track dynamic relocs needed for local syms too.
5812 We really need local syms available to do this
5813 easily. Oh well. */
5814 struct ppc_dyn_relocs *p;
5815 struct ppc_dyn_relocs **head;
5816 bfd_boolean is_ifunc;
5817 asection *s;
5818 void *vpp;
5819 Elf_Internal_Sym *isym;
5820
5821 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5822 abfd, r_symndx);
5823 if (isym == NULL)
5824 return FALSE;
5825
5826 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5827 if (s == NULL)
5828 s = sec;
5829
5830 vpp = &elf_section_data (s)->local_dynrel;
5831 head = (struct ppc_dyn_relocs **) vpp;
5832 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5833 p = *head;
5834 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5835 p = p->next;
5836 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5837 {
5838 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5839 if (p == NULL)
5840 return FALSE;
5841 p->next = *head;
5842 *head = p;
5843 p->sec = sec;
5844 p->ifunc = is_ifunc;
5845 p->count = 0;
5846 }
5847 p->count += 1;
5848 }
5849 }
5850 break;
5851
5852 default:
5853 break;
5854 }
5855 }
5856
5857 return TRUE;
5858}
5859
5860/* Merge backend specific data from an object file to the output
5861 object file when linking. */
5862
5863static bfd_boolean
5864ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5865{
5866 unsigned long iflags, oflags;
5867
5868 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5869 return TRUE;
5870
5871 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5872 return TRUE;
5873
5874 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5875 return FALSE;
5876
5877 iflags = elf_elfheader (ibfd)->e_flags;
5878 oflags = elf_elfheader (obfd)->e_flags;
5879
5880 if (iflags & ~EF_PPC64_ABI)
5881 {
5882 (*_bfd_error_handler)
5883 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5884 bfd_set_error (bfd_error_bad_value);
5885 return FALSE;
5886 }
5887 else if (iflags != oflags && iflags != 0)
5888 {
5889 (*_bfd_error_handler)
5890 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5891 ibfd, iflags, oflags);
5892 bfd_set_error (bfd_error_bad_value);
5893 return FALSE;
5894 }
5895
5896 /* Merge Tag_compatibility attributes and any common GNU ones. */
5897 _bfd_elf_merge_object_attributes (ibfd, obfd);
5898
5899 return TRUE;
5900}
5901
5902static bfd_boolean
5903ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5904{
5905 /* Print normal ELF private data. */
5906 _bfd_elf_print_private_bfd_data (abfd, ptr);
5907
5908 if (elf_elfheader (abfd)->e_flags != 0)
5909 {
5910 FILE *file = ptr;
5911
5912 /* xgettext:c-format */
5913 fprintf (file, _("private flags = 0x%lx:"),
5914 elf_elfheader (abfd)->e_flags);
5915
5916 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5917 fprintf (file, _(" [abiv%ld]"),
5918 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5919 fputc ('\n', file);
5920 }
5921
5922 return TRUE;
5923}
5924
5925/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5926 of the code entry point, and its section, which must be in the same
5927 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
5928
5929static bfd_vma
5930opd_entry_value (asection *opd_sec,
5931 bfd_vma offset,
5932 asection **code_sec,
5933 bfd_vma *code_off,
5934 bfd_boolean in_code_sec)
5935{
5936 bfd *opd_bfd = opd_sec->owner;
5937 Elf_Internal_Rela *relocs;
5938 Elf_Internal_Rela *lo, *hi, *look;
5939 bfd_vma val;
5940
5941 /* No relocs implies we are linking a --just-symbols object, or looking
5942 at a final linked executable with addr2line or somesuch. */
5943 if (opd_sec->reloc_count == 0)
5944 {
5945 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5946
5947 if (contents == NULL)
5948 {
5949 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5950 return (bfd_vma) -1;
5951 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5952 }
5953
5954 val = bfd_get_64 (opd_bfd, contents + offset);
5955 if (code_sec != NULL)
5956 {
5957 asection *sec, *likely = NULL;
5958
5959 if (in_code_sec)
5960 {
5961 sec = *code_sec;
5962 if (sec->vma <= val
5963 && val < sec->vma + sec->size)
5964 likely = sec;
5965 else
5966 val = -1;
5967 }
5968 else
5969 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5970 if (sec->vma <= val
5971 && (sec->flags & SEC_LOAD) != 0
5972 && (sec->flags & SEC_ALLOC) != 0)
5973 likely = sec;
5974 if (likely != NULL)
5975 {
5976 *code_sec = likely;
5977 if (code_off != NULL)
5978 *code_off = val - likely->vma;
5979 }
5980 }
5981 return val;
5982 }
5983
5984 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5985
5986 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5987 if (relocs == NULL)
5988 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5989 /* PR 17512: file: df8e1fd6. */
5990 if (relocs == NULL)
5991 return (bfd_vma) -1;
5992
5993 /* Go find the opd reloc at the sym address. */
5994 lo = relocs;
5995 BFD_ASSERT (lo != NULL);
5996 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5997 val = (bfd_vma) -1;
5998 while (lo < hi)
5999 {
6000 look = lo + (hi - lo) / 2;
6001 if (look->r_offset < offset)
6002 lo = look + 1;
6003 else if (look->r_offset > offset)
6004 hi = look;
6005 else
6006 {
6007 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6008
6009 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6010 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6011 {
6012 unsigned long symndx = ELF64_R_SYM (look->r_info);
6013 asection *sec = NULL;
6014
6015 if (symndx >= symtab_hdr->sh_info
6016 && elf_sym_hashes (opd_bfd) != NULL)
6017 {
6018 struct elf_link_hash_entry **sym_hashes;
6019 struct elf_link_hash_entry *rh;
6020
6021 sym_hashes = elf_sym_hashes (opd_bfd);
6022 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6023 if (rh != NULL)
6024 {
6025 rh = elf_follow_link (rh);
6026 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
6027 || rh->root.type == bfd_link_hash_defweak);
6028 val = rh->root.u.def.value;
6029 sec = rh->root.u.def.section;
6030 if (sec->owner != opd_bfd)
6031 {
6032 sec = NULL;
6033 val = (bfd_vma) -1;
6034 }
6035 }
6036 }
6037
6038 if (sec == NULL)
6039 {
6040 Elf_Internal_Sym *sym;
6041
6042 if (symndx < symtab_hdr->sh_info)
6043 {
6044 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6045 if (sym == NULL)
6046 {
6047 size_t symcnt = symtab_hdr->sh_info;
6048 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6049 symcnt, 0,
6050 NULL, NULL, NULL);
6051 if (sym == NULL)
6052 break;
6053 symtab_hdr->contents = (bfd_byte *) sym;
6054 }
6055 sym += symndx;
6056 }
6057 else
6058 {
6059 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6060 1, symndx,
6061 NULL, NULL, NULL);
6062 if (sym == NULL)
6063 break;
6064 }
6065 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6066 if (sec == NULL)
6067 break;
6068 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6069 val = sym->st_value;
6070 }
6071
6072 val += look->r_addend;
6073 if (code_off != NULL)
6074 *code_off = val;
6075 if (code_sec != NULL)
6076 {
6077 if (in_code_sec && *code_sec != sec)
6078 return -1;
6079 else
6080 *code_sec = sec;
6081 }
6082 if (sec->output_section != NULL)
6083 val += sec->output_section->vma + sec->output_offset;
6084 }
6085 break;
6086 }
6087 }
6088
6089 return val;
6090}
6091
6092/* If the ELF symbol SYM might be a function in SEC, return the
6093 function size and set *CODE_OFF to the function's entry point,
6094 otherwise return zero. */
6095
6096static bfd_size_type
6097ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6098 bfd_vma *code_off)
6099{
6100 bfd_size_type size;
6101
6102 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6103 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6104 return 0;
6105
6106 size = 0;
6107 if (!(sym->flags & BSF_SYNTHETIC))
6108 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6109
6110 if (strcmp (sym->section->name, ".opd") == 0)
6111 {
6112 if (opd_entry_value (sym->section, sym->value,
6113 &sec, code_off, TRUE) == (bfd_vma) -1)
6114 return 0;
6115 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6116 symbol. This size has nothing to do with the code size of the
6117 function, which is what we're supposed to return, but the
6118 code size isn't available without looking up the dot-sym.
6119 However, doing that would be a waste of time particularly
6120 since elf_find_function will look at the dot-sym anyway.
6121 Now, elf_find_function will keep the largest size of any
6122 function sym found at the code address of interest, so return
6123 1 here to avoid it incorrectly caching a larger function size
6124 for a small function. This does mean we return the wrong
6125 size for a new-ABI function of size 24, but all that does is
6126 disable caching for such functions. */
6127 if (size == 24)
6128 size = 1;
6129 }
6130 else
6131 {
6132 if (sym->section != sec)
6133 return 0;
6134 *code_off = sym->value;
6135 }
6136 if (size == 0)
6137 size = 1;
6138 return size;
6139}
6140
6141/* Return true if symbol is defined in a regular object file. */
6142
6143static bfd_boolean
6144is_static_defined (struct elf_link_hash_entry *h)
6145{
6146 return ((h->root.type == bfd_link_hash_defined
6147 || h->root.type == bfd_link_hash_defweak)
6148 && h->root.u.def.section != NULL
6149 && h->root.u.def.section->output_section != NULL);
6150}
6151
6152/* If FDH is a function descriptor symbol, return the associated code
6153 entry symbol if it is defined. Return NULL otherwise. */
6154
6155static struct ppc_link_hash_entry *
6156defined_code_entry (struct ppc_link_hash_entry *fdh)
6157{
6158 if (fdh->is_func_descriptor)
6159 {
6160 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6161 if (fh->elf.root.type == bfd_link_hash_defined
6162 || fh->elf.root.type == bfd_link_hash_defweak)
6163 return fh;
6164 }
6165 return NULL;
6166}
6167
6168/* If FH is a function code entry symbol, return the associated
6169 function descriptor symbol if it is defined. Return NULL otherwise. */
6170
6171static struct ppc_link_hash_entry *
6172defined_func_desc (struct ppc_link_hash_entry *fh)
6173{
6174 if (fh->oh != NULL
6175 && fh->oh->is_func_descriptor)
6176 {
6177 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6178 if (fdh->elf.root.type == bfd_link_hash_defined
6179 || fdh->elf.root.type == bfd_link_hash_defweak)
6180 return fdh;
6181 }
6182 return NULL;
6183}
6184
6185/* Mark all our entry sym sections, both opd and code section. */
6186
6187static void
6188ppc64_elf_gc_keep (struct bfd_link_info *info)
6189{
6190 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6191 struct bfd_sym_chain *sym;
6192
6193 if (htab == NULL)
6194 return;
6195
6196 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6197 {
6198 struct ppc_link_hash_entry *eh, *fh;
6199 asection *sec;
6200
6201 eh = (struct ppc_link_hash_entry *)
6202 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6203 if (eh == NULL)
6204 continue;
6205 if (eh->elf.root.type != bfd_link_hash_defined
6206 && eh->elf.root.type != bfd_link_hash_defweak)
6207 continue;
6208
6209 fh = defined_code_entry (eh);
6210 if (fh != NULL)
6211 {
6212 sec = fh->elf.root.u.def.section;
6213 sec->flags |= SEC_KEEP;
6214 }
6215 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6216 && opd_entry_value (eh->elf.root.u.def.section,
6217 eh->elf.root.u.def.value,
6218 &sec, NULL, FALSE) != (bfd_vma) -1)
6219 sec->flags |= SEC_KEEP;
6220
6221 sec = eh->elf.root.u.def.section;
6222 sec->flags |= SEC_KEEP;
6223 }
6224}
6225
6226/* Mark sections containing dynamically referenced symbols. When
6227 building shared libraries, we must assume that any visible symbol is
6228 referenced. */
6229
6230static bfd_boolean
6231ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6232{
6233 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6234 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6235 struct ppc_link_hash_entry *fdh;
6236 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6237
6238 /* Dynamic linking info is on the func descriptor sym. */
6239 fdh = defined_func_desc (eh);
6240 if (fdh != NULL)
6241 eh = fdh;
6242
6243 if ((eh->elf.root.type == bfd_link_hash_defined
6244 || eh->elf.root.type == bfd_link_hash_defweak)
6245 && (eh->elf.ref_dynamic
6246 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6247 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6248 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6249 && (!info->executable
6250 || info->export_dynamic
6251 || (eh->elf.dynamic
6252 && d != NULL
6253 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6254 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6255 || !bfd_hide_sym_by_version (info->version_info,
6256 eh->elf.root.root.string)))))
6257 {
6258 asection *code_sec;
6259 struct ppc_link_hash_entry *fh;
6260
6261 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6262
6263 /* Function descriptor syms cause the associated
6264 function code sym section to be marked. */
6265 fh = defined_code_entry (eh);
6266 if (fh != NULL)
6267 {
6268 code_sec = fh->elf.root.u.def.section;
6269 code_sec->flags |= SEC_KEEP;
6270 }
6271 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6272 && opd_entry_value (eh->elf.root.u.def.section,
6273 eh->elf.root.u.def.value,
6274 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6275 code_sec->flags |= SEC_KEEP;
6276 }
6277
6278 return TRUE;
6279}
6280
6281/* Return the section that should be marked against GC for a given
6282 relocation. */
6283
6284static asection *
6285ppc64_elf_gc_mark_hook (asection *sec,
6286 struct bfd_link_info *info,
6287 Elf_Internal_Rela *rel,
6288 struct elf_link_hash_entry *h,
6289 Elf_Internal_Sym *sym)
6290{
6291 asection *rsec;
6292
6293 /* Syms return NULL if we're marking .opd, so we avoid marking all
6294 function sections, as all functions are referenced in .opd. */
6295 rsec = NULL;
6296 if (get_opd_info (sec) != NULL)
6297 return rsec;
6298
6299 if (h != NULL)
6300 {
6301 enum elf_ppc64_reloc_type r_type;
6302 struct ppc_link_hash_entry *eh, *fh, *fdh;
6303
6304 r_type = ELF64_R_TYPE (rel->r_info);
6305 switch (r_type)
6306 {
6307 case R_PPC64_GNU_VTINHERIT:
6308 case R_PPC64_GNU_VTENTRY:
6309 break;
6310
6311 default:
6312 switch (h->root.type)
6313 {
6314 case bfd_link_hash_defined:
6315 case bfd_link_hash_defweak:
6316 eh = (struct ppc_link_hash_entry *) h;
6317 fdh = defined_func_desc (eh);
6318 if (fdh != NULL)
6319 eh = fdh;
6320
6321 /* Function descriptor syms cause the associated
6322 function code sym section to be marked. */
6323 fh = defined_code_entry (eh);
6324 if (fh != NULL)
6325 {
6326 /* They also mark their opd section. */
6327 eh->elf.root.u.def.section->gc_mark = 1;
6328
6329 rsec = fh->elf.root.u.def.section;
6330 }
6331 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6332 && opd_entry_value (eh->elf.root.u.def.section,
6333 eh->elf.root.u.def.value,
6334 &rsec, NULL, FALSE) != (bfd_vma) -1)
6335 eh->elf.root.u.def.section->gc_mark = 1;
6336 else
6337 rsec = h->root.u.def.section;
6338 break;
6339
6340 case bfd_link_hash_common:
6341 rsec = h->root.u.c.p->section;
6342 break;
6343
6344 default:
6345 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6346 }
6347 }
6348 }
6349 else
6350 {
6351 struct _opd_sec_data *opd;
6352
6353 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6354 opd = get_opd_info (rsec);
6355 if (opd != NULL && opd->func_sec != NULL)
6356 {
6357 rsec->gc_mark = 1;
6358
6359 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6360 }
6361 }
6362
6363 return rsec;
6364}
6365
6366/* Update the .got, .plt. and dynamic reloc reference counts for the
6367 section being removed. */
6368
6369static bfd_boolean
6370ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6371 asection *sec, const Elf_Internal_Rela *relocs)
6372{
6373 struct ppc_link_hash_table *htab;
6374 Elf_Internal_Shdr *symtab_hdr;
6375 struct elf_link_hash_entry **sym_hashes;
6376 struct got_entry **local_got_ents;
6377 const Elf_Internal_Rela *rel, *relend;
6378
6379 if (info->relocatable)
6380 return TRUE;
6381
6382 if ((sec->flags & SEC_ALLOC) == 0)
6383 return TRUE;
6384
6385 elf_section_data (sec)->local_dynrel = NULL;
6386
6387 htab = ppc_hash_table (info);
6388 if (htab == NULL)
6389 return FALSE;
6390
6391 symtab_hdr = &elf_symtab_hdr (abfd);
6392 sym_hashes = elf_sym_hashes (abfd);
6393 local_got_ents = elf_local_got_ents (abfd);
6394
6395 relend = relocs + sec->reloc_count;
6396 for (rel = relocs; rel < relend; rel++)
6397 {
6398 unsigned long r_symndx;
6399 enum elf_ppc64_reloc_type r_type;
6400 struct elf_link_hash_entry *h = NULL;
6401 unsigned char tls_type = 0;
6402
6403 r_symndx = ELF64_R_SYM (rel->r_info);
6404 r_type = ELF64_R_TYPE (rel->r_info);
6405 if (r_symndx >= symtab_hdr->sh_info)
6406 {
6407 struct ppc_link_hash_entry *eh;
6408 struct elf_dyn_relocs **pp;
6409 struct elf_dyn_relocs *p;
6410
6411 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6412 h = elf_follow_link (h);
6413 eh = (struct ppc_link_hash_entry *) h;
6414
6415 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6416 if (p->sec == sec)
6417 {
6418 /* Everything must go for SEC. */
6419 *pp = p->next;
6420 break;
6421 }
6422 }
6423
6424 if (is_branch_reloc (r_type))
6425 {
6426 struct plt_entry **ifunc = NULL;
6427 if (h != NULL)
6428 {
6429 if (h->type == STT_GNU_IFUNC)
6430 ifunc = &h->plt.plist;
6431 }
6432 else if (local_got_ents != NULL)
6433 {
6434 struct plt_entry **local_plt = (struct plt_entry **)
6435 (local_got_ents + symtab_hdr->sh_info);
6436 unsigned char *local_got_tls_masks = (unsigned char *)
6437 (local_plt + symtab_hdr->sh_info);
6438 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6439 ifunc = local_plt + r_symndx;
6440 }
6441 if (ifunc != NULL)
6442 {
6443 struct plt_entry *ent;
6444
6445 for (ent = *ifunc; ent != NULL; ent = ent->next)
6446 if (ent->addend == rel->r_addend)
6447 break;
6448 if (ent == NULL)
6449 abort ();
6450 if (ent->plt.refcount > 0)
6451 ent->plt.refcount -= 1;
6452 continue;
6453 }
6454 }
6455
6456 switch (r_type)
6457 {
6458 case R_PPC64_GOT_TLSLD16:
6459 case R_PPC64_GOT_TLSLD16_LO:
6460 case R_PPC64_GOT_TLSLD16_HI:
6461 case R_PPC64_GOT_TLSLD16_HA:
6462 tls_type = TLS_TLS | TLS_LD;
6463 goto dogot;
6464
6465 case R_PPC64_GOT_TLSGD16:
6466 case R_PPC64_GOT_TLSGD16_LO:
6467 case R_PPC64_GOT_TLSGD16_HI:
6468 case R_PPC64_GOT_TLSGD16_HA:
6469 tls_type = TLS_TLS | TLS_GD;
6470 goto dogot;
6471
6472 case R_PPC64_GOT_TPREL16_DS:
6473 case R_PPC64_GOT_TPREL16_LO_DS:
6474 case R_PPC64_GOT_TPREL16_HI:
6475 case R_PPC64_GOT_TPREL16_HA:
6476 tls_type = TLS_TLS | TLS_TPREL;
6477 goto dogot;
6478
6479 case R_PPC64_GOT_DTPREL16_DS:
6480 case R_PPC64_GOT_DTPREL16_LO_DS:
6481 case R_PPC64_GOT_DTPREL16_HI:
6482 case R_PPC64_GOT_DTPREL16_HA:
6483 tls_type = TLS_TLS | TLS_DTPREL;
6484 goto dogot;
6485
6486 case R_PPC64_GOT16:
6487 case R_PPC64_GOT16_DS:
6488 case R_PPC64_GOT16_HA:
6489 case R_PPC64_GOT16_HI:
6490 case R_PPC64_GOT16_LO:
6491 case R_PPC64_GOT16_LO_DS:
6492 dogot:
6493 {
6494 struct got_entry *ent;
6495
6496 if (h != NULL)
6497 ent = h->got.glist;
6498 else
6499 ent = local_got_ents[r_symndx];
6500
6501 for (; ent != NULL; ent = ent->next)
6502 if (ent->addend == rel->r_addend
6503 && ent->owner == abfd
6504 && ent->tls_type == tls_type)
6505 break;
6506 if (ent == NULL)
6507 abort ();
6508 if (ent->got.refcount > 0)
6509 ent->got.refcount -= 1;
6510 }
6511 break;
6512
6513 case R_PPC64_PLT16_HA:
6514 case R_PPC64_PLT16_HI:
6515 case R_PPC64_PLT16_LO:
6516 case R_PPC64_PLT32:
6517 case R_PPC64_PLT64:
6518 case R_PPC64_REL14:
6519 case R_PPC64_REL14_BRNTAKEN:
6520 case R_PPC64_REL14_BRTAKEN:
6521 case R_PPC64_REL24:
6522 if (h != NULL)
6523 {
6524 struct plt_entry *ent;
6525
6526 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6527 if (ent->addend == rel->r_addend)
6528 break;
6529 if (ent != NULL && ent->plt.refcount > 0)
6530 ent->plt.refcount -= 1;
6531 }
6532 break;
6533
6534 default:
6535 break;
6536 }
6537 }
6538 return TRUE;
6539}
6540
6541/* The maximum size of .sfpr. */
6542#define SFPR_MAX (218*4)
6543
6544struct sfpr_def_parms
6545{
6546 const char name[12];
6547 unsigned char lo, hi;
6548 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6549 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6550};
6551
6552/* Auto-generate _save*, _rest* functions in .sfpr. */
6553
6554static bfd_boolean
6555sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6556{
6557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6558 unsigned int i;
6559 size_t len = strlen (parm->name);
6560 bfd_boolean writing = FALSE;
6561 char sym[16];
6562
6563 if (htab == NULL)
6564 return FALSE;
6565
6566 memcpy (sym, parm->name, len);
6567 sym[len + 2] = 0;
6568
6569 for (i = parm->lo; i <= parm->hi; i++)
6570 {
6571 struct elf_link_hash_entry *h;
6572
6573 sym[len + 0] = i / 10 + '0';
6574 sym[len + 1] = i % 10 + '0';
6575 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6576 if (h != NULL
6577 && !h->def_regular)
6578 {
6579 h->root.type = bfd_link_hash_defined;
6580 h->root.u.def.section = htab->sfpr;
6581 h->root.u.def.value = htab->sfpr->size;
6582 h->type = STT_FUNC;
6583 h->def_regular = 1;
6584 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6585 writing = TRUE;
6586 if (htab->sfpr->contents == NULL)
6587 {
6588 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6589 if (htab->sfpr->contents == NULL)
6590 return FALSE;
6591 }
6592 }
6593 if (writing)
6594 {
6595 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6596 if (i != parm->hi)
6597 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6598 else
6599 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6600 htab->sfpr->size = p - htab->sfpr->contents;
6601 }
6602 }
6603
6604 return TRUE;
6605}
6606
6607static bfd_byte *
6608savegpr0 (bfd *abfd, bfd_byte *p, int r)
6609{
6610 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6611 return p + 4;
6612}
6613
6614static bfd_byte *
6615savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6616{
6617 p = savegpr0 (abfd, p, r);
6618 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6619 p = p + 4;
6620 bfd_put_32 (abfd, BLR, p);
6621 return p + 4;
6622}
6623
6624static bfd_byte *
6625restgpr0 (bfd *abfd, bfd_byte *p, int r)
6626{
6627 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6628 return p + 4;
6629}
6630
6631static bfd_byte *
6632restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6633{
6634 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6635 p = p + 4;
6636 p = restgpr0 (abfd, p, r);
6637 bfd_put_32 (abfd, MTLR_R0, p);
6638 p = p + 4;
6639 if (r == 29)
6640 {
6641 p = restgpr0 (abfd, p, 30);
6642 p = restgpr0 (abfd, p, 31);
6643 }
6644 bfd_put_32 (abfd, BLR, p);
6645 return p + 4;
6646}
6647
6648static bfd_byte *
6649savegpr1 (bfd *abfd, bfd_byte *p, int r)
6650{
6651 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6652 return p + 4;
6653}
6654
6655static bfd_byte *
6656savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6657{
6658 p = savegpr1 (abfd, p, r);
6659 bfd_put_32 (abfd, BLR, p);
6660 return p + 4;
6661}
6662
6663static bfd_byte *
6664restgpr1 (bfd *abfd, bfd_byte *p, int r)
6665{
6666 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6667 return p + 4;
6668}
6669
6670static bfd_byte *
6671restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6672{
6673 p = restgpr1 (abfd, p, r);
6674 bfd_put_32 (abfd, BLR, p);
6675 return p + 4;
6676}
6677
6678static bfd_byte *
6679savefpr (bfd *abfd, bfd_byte *p, int r)
6680{
6681 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6682 return p + 4;
6683}
6684
6685static bfd_byte *
6686savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6687{
6688 p = savefpr (abfd, p, r);
6689 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6690 p = p + 4;
6691 bfd_put_32 (abfd, BLR, p);
6692 return p + 4;
6693}
6694
6695static bfd_byte *
6696restfpr (bfd *abfd, bfd_byte *p, int r)
6697{
6698 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6699 return p + 4;
6700}
6701
6702static bfd_byte *
6703restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6704{
6705 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6706 p = p + 4;
6707 p = restfpr (abfd, p, r);
6708 bfd_put_32 (abfd, MTLR_R0, p);
6709 p = p + 4;
6710 if (r == 29)
6711 {
6712 p = restfpr (abfd, p, 30);
6713 p = restfpr (abfd, p, 31);
6714 }
6715 bfd_put_32 (abfd, BLR, p);
6716 return p + 4;
6717}
6718
6719static bfd_byte *
6720savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6721{
6722 p = savefpr (abfd, p, r);
6723 bfd_put_32 (abfd, BLR, p);
6724 return p + 4;
6725}
6726
6727static bfd_byte *
6728restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6729{
6730 p = restfpr (abfd, p, r);
6731 bfd_put_32 (abfd, BLR, p);
6732 return p + 4;
6733}
6734
6735static bfd_byte *
6736savevr (bfd *abfd, bfd_byte *p, int r)
6737{
6738 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6739 p = p + 4;
6740 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6741 return p + 4;
6742}
6743
6744static bfd_byte *
6745savevr_tail (bfd *abfd, bfd_byte *p, int r)
6746{
6747 p = savevr (abfd, p, r);
6748 bfd_put_32 (abfd, BLR, p);
6749 return p + 4;
6750}
6751
6752static bfd_byte *
6753restvr (bfd *abfd, bfd_byte *p, int r)
6754{
6755 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6756 p = p + 4;
6757 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6758 return p + 4;
6759}
6760
6761static bfd_byte *
6762restvr_tail (bfd *abfd, bfd_byte *p, int r)
6763{
6764 p = restvr (abfd, p, r);
6765 bfd_put_32 (abfd, BLR, p);
6766 return p + 4;
6767}
6768
6769/* Called via elf_link_hash_traverse to transfer dynamic linking
6770 information on function code symbol entries to their corresponding
6771 function descriptor symbol entries. */
6772
6773static bfd_boolean
6774func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6775{
6776 struct bfd_link_info *info;
6777 struct ppc_link_hash_table *htab;
6778 struct plt_entry *ent;
6779 struct ppc_link_hash_entry *fh;
6780 struct ppc_link_hash_entry *fdh;
6781 bfd_boolean force_local;
6782
6783 fh = (struct ppc_link_hash_entry *) h;
6784 if (fh->elf.root.type == bfd_link_hash_indirect)
6785 return TRUE;
6786
6787 info = inf;
6788 htab = ppc_hash_table (info);
6789 if (htab == NULL)
6790 return FALSE;
6791
6792 /* Resolve undefined references to dot-symbols as the value
6793 in the function descriptor, if we have one in a regular object.
6794 This is to satisfy cases like ".quad .foo". Calls to functions
6795 in dynamic objects are handled elsewhere. */
6796 if (fh->elf.root.type == bfd_link_hash_undefweak
6797 && fh->was_undefined
6798 && (fdh = defined_func_desc (fh)) != NULL
6799 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6800 && opd_entry_value (fdh->elf.root.u.def.section,
6801 fdh->elf.root.u.def.value,
6802 &fh->elf.root.u.def.section,
6803 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6804 {
6805 fh->elf.root.type = fdh->elf.root.type;
6806 fh->elf.forced_local = 1;
6807 fh->elf.def_regular = fdh->elf.def_regular;
6808 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6809 }
6810
6811 /* If this is a function code symbol, transfer dynamic linking
6812 information to the function descriptor symbol. */
6813 if (!fh->is_func)
6814 return TRUE;
6815
6816 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6817 if (ent->plt.refcount > 0)
6818 break;
6819 if (ent == NULL
6820 || fh->elf.root.root.string[0] != '.'
6821 || fh->elf.root.root.string[1] == '\0')
6822 return TRUE;
6823
6824 /* Find the corresponding function descriptor symbol. Create it
6825 as undefined if necessary. */
6826
6827 fdh = lookup_fdh (fh, htab);
6828 if (fdh == NULL
6829 && !info->executable
6830 && (fh->elf.root.type == bfd_link_hash_undefined
6831 || fh->elf.root.type == bfd_link_hash_undefweak))
6832 {
6833 fdh = make_fdh (info, fh);
6834 if (fdh == NULL)
6835 return FALSE;
6836 }
6837
6838 /* Fake function descriptors are made undefweak. If the function
6839 code symbol is strong undefined, make the fake sym the same.
6840 If the function code symbol is defined, then force the fake
6841 descriptor local; We can't support overriding of symbols in a
6842 shared library on a fake descriptor. */
6843
6844 if (fdh != NULL
6845 && fdh->fake
6846 && fdh->elf.root.type == bfd_link_hash_undefweak)
6847 {
6848 if (fh->elf.root.type == bfd_link_hash_undefined)
6849 {
6850 fdh->elf.root.type = bfd_link_hash_undefined;
6851 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6852 }
6853 else if (fh->elf.root.type == bfd_link_hash_defined
6854 || fh->elf.root.type == bfd_link_hash_defweak)
6855 {
6856 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6857 }
6858 }
6859
6860 if (fdh != NULL
6861 && !fdh->elf.forced_local
6862 && (!info->executable
6863 || fdh->elf.def_dynamic
6864 || fdh->elf.ref_dynamic
6865 || (fdh->elf.root.type == bfd_link_hash_undefweak
6866 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6867 {
6868 if (fdh->elf.dynindx == -1)
6869 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6870 return FALSE;
6871 fdh->elf.ref_regular |= fh->elf.ref_regular;
6872 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6873 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6874 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6875 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6876 {
6877 move_plt_plist (fh, fdh);
6878 fdh->elf.needs_plt = 1;
6879 }
6880 fdh->is_func_descriptor = 1;
6881 fdh->oh = fh;
6882 fh->oh = fdh;
6883 }
6884
6885 /* Now that the info is on the function descriptor, clear the
6886 function code sym info. Any function code syms for which we
6887 don't have a definition in a regular file, we force local.
6888 This prevents a shared library from exporting syms that have
6889 been imported from another library. Function code syms that
6890 are really in the library we must leave global to prevent the
6891 linker dragging in a definition from a static library. */
6892 force_local = (!fh->elf.def_regular
6893 || fdh == NULL
6894 || !fdh->elf.def_regular
6895 || fdh->elf.forced_local);
6896 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6897
6898 return TRUE;
6899}
6900
6901/* Called near the start of bfd_elf_size_dynamic_sections. We use
6902 this hook to a) provide some gcc support functions, and b) transfer
6903 dynamic linking information gathered so far on function code symbol
6904 entries, to their corresponding function descriptor symbol entries. */
6905
6906static bfd_boolean
6907ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6908 struct bfd_link_info *info)
6909{
6910 struct ppc_link_hash_table *htab;
6911 unsigned int i;
6912 static const struct sfpr_def_parms funcs[] =
6913 {
6914 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6915 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6916 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6917 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6918 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6919 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6920 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6921 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6922 { "._savef", 14, 31, savefpr, savefpr1_tail },
6923 { "._restf", 14, 31, restfpr, restfpr1_tail },
6924 { "_savevr_", 20, 31, savevr, savevr_tail },
6925 { "_restvr_", 20, 31, restvr, restvr_tail }
6926 };
6927
6928 htab = ppc_hash_table (info);
6929 if (htab == NULL)
6930 return FALSE;
6931
6932 if (!info->relocatable
6933 && htab->elf.hgot != NULL)
6934 {
6935 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6936 /* Make .TOC. defined so as to prevent it being made dynamic.
6937 The wrong value here is fixed later in ppc64_elf_set_toc. */
6938 htab->elf.hgot->type = STT_OBJECT;
6939 htab->elf.hgot->root.type = bfd_link_hash_defined;
6940 htab->elf.hgot->root.u.def.value = 0;
6941 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6942 htab->elf.hgot->def_regular = 1;
6943 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6944 | STV_HIDDEN);
6945 }
6946
6947 if (htab->sfpr == NULL)
6948 /* We don't have any relocs. */
6949 return TRUE;
6950
6951 /* Provide any missing _save* and _rest* functions. */
6952 htab->sfpr->size = 0;
6953 if (htab->params->save_restore_funcs)
6954 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6955 if (!sfpr_define (info, &funcs[i]))
6956 return FALSE;
6957
6958 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6959
6960 if (htab->sfpr->size == 0)
6961 htab->sfpr->flags |= SEC_EXCLUDE;
6962
6963 return TRUE;
6964}
6965
6966/* Return true if we have dynamic relocs that apply to read-only sections. */
6967
6968static bfd_boolean
6969readonly_dynrelocs (struct elf_link_hash_entry *h)
6970{
6971 struct ppc_link_hash_entry *eh;
6972 struct elf_dyn_relocs *p;
6973
6974 eh = (struct ppc_link_hash_entry *) h;
6975 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6976 {
6977 asection *s = p->sec->output_section;
6978
6979 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6980 return TRUE;
6981 }
6982 return FALSE;
6983}
6984
6985/* Adjust a symbol defined by a dynamic object and referenced by a
6986 regular object. The current definition is in some section of the
6987 dynamic object, but we're not including those sections. We have to
6988 change the definition to something the rest of the link can
6989 understand. */
6990
6991static bfd_boolean
6992ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6993 struct elf_link_hash_entry *h)
6994{
6995 struct ppc_link_hash_table *htab;
6996 asection *s;
6997
6998 htab = ppc_hash_table (info);
6999 if (htab == NULL)
7000 return FALSE;
7001
7002 /* Deal with function syms. */
7003 if (h->type == STT_FUNC
7004 || h->type == STT_GNU_IFUNC
7005 || h->needs_plt)
7006 {
7007 /* Clear procedure linkage table information for any symbol that
7008 won't need a .plt entry. */
7009 struct plt_entry *ent;
7010 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7011 if (ent->plt.refcount > 0)
7012 break;
7013 if (ent == NULL
7014 || (h->type != STT_GNU_IFUNC
7015 && (SYMBOL_CALLS_LOCAL (info, h)
7016 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7017 && h->root.type == bfd_link_hash_undefweak))))
7018 {
7019 h->plt.plist = NULL;
7020 h->needs_plt = 0;
7021 h->pointer_equality_needed = 0;
7022 }
7023 else if (abiversion (info->output_bfd) == 2)
7024 {
7025 /* Taking a function's address in a read/write section
7026 doesn't require us to define the function symbol in the
7027 executable on a global entry stub. A dynamic reloc can
7028 be used instead. */
7029 if (h->pointer_equality_needed
7030 && h->type != STT_GNU_IFUNC
7031 && !readonly_dynrelocs (h))
7032 {
7033 h->pointer_equality_needed = 0;
7034 h->non_got_ref = 0;
7035 }
7036
7037 /* After adjust_dynamic_symbol, non_got_ref set in the
7038 non-shared case means that we have allocated space in
7039 .dynbss for the symbol and thus dyn_relocs for this
7040 symbol should be discarded.
7041 If we get here we know we are making a PLT entry for this
7042 symbol, and in an executable we'd normally resolve
7043 relocations against this symbol to the PLT entry. Allow
7044 dynamic relocs if the reference is weak, and the dynamic
7045 relocs will not cause text relocation. */
7046 else if (!h->ref_regular_nonweak
7047 && h->non_got_ref
7048 && h->type != STT_GNU_IFUNC
7049 && !readonly_dynrelocs (h))
7050 h->non_got_ref = 0;
7051
7052 /* If making a plt entry, then we don't need copy relocs. */
7053 return TRUE;
7054 }
7055 }
7056 else
7057 h->plt.plist = NULL;
7058
7059 /* If this is a weak symbol, and there is a real definition, the
7060 processor independent code will have arranged for us to see the
7061 real definition first, and we can just use the same value. */
7062 if (h->u.weakdef != NULL)
7063 {
7064 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7065 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7066 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7067 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7068 if (ELIMINATE_COPY_RELOCS)
7069 h->non_got_ref = h->u.weakdef->non_got_ref;
7070 return TRUE;
7071 }
7072
7073 /* If we are creating a shared library, we must presume that the
7074 only references to the symbol are via the global offset table.
7075 For such cases we need not do anything here; the relocations will
7076 be handled correctly by relocate_section. */
7077 if (info->shared)
7078 return TRUE;
7079
7080 /* If there are no references to this symbol that do not use the
7081 GOT, we don't need to generate a copy reloc. */
7082 if (!h->non_got_ref)
7083 return TRUE;
7084
7085 /* Don't generate a copy reloc for symbols defined in the executable. */
7086 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7087 return TRUE;
7088
7089 /* If we didn't find any dynamic relocs in read-only sections, then
7090 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7091 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7092 {
7093 h->non_got_ref = 0;
7094 return TRUE;
7095 }
7096
7097 if (h->plt.plist != NULL)
7098 {
7099 /* We should never get here, but unfortunately there are versions
7100 of gcc out there that improperly (for this ABI) put initialized
7101 function pointers, vtable refs and suchlike in read-only
7102 sections. Allow them to proceed, but warn that this might
7103 break at runtime. */
7104 info->callbacks->einfo
7105 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7106 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7107 h->root.root.string);
7108 }
7109
7110 /* This is a reference to a symbol defined by a dynamic object which
7111 is not a function. */
7112
7113 /* We must allocate the symbol in our .dynbss section, which will
7114 become part of the .bss section of the executable. There will be
7115 an entry for this symbol in the .dynsym section. The dynamic
7116 object will contain position independent code, so all references
7117 from the dynamic object to this symbol will go through the global
7118 offset table. The dynamic linker will use the .dynsym entry to
7119 determine the address it must put in the global offset table, so
7120 both the dynamic object and the regular object will refer to the
7121 same memory location for the variable. */
7122
7123 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7124 to copy the initial value out of the dynamic object and into the
7125 runtime process image. We need to remember the offset into the
7126 .rela.bss section we are going to use. */
7127 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7128 {
7129 htab->relbss->size += sizeof (Elf64_External_Rela);
7130 h->needs_copy = 1;
7131 }
7132
7133 s = htab->dynbss;
7134
7135 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7136}
7137
7138/* If given a function descriptor symbol, hide both the function code
7139 sym and the descriptor. */
7140static void
7141ppc64_elf_hide_symbol (struct bfd_link_info *info,
7142 struct elf_link_hash_entry *h,
7143 bfd_boolean force_local)
7144{
7145 struct ppc_link_hash_entry *eh;
7146 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7147
7148 eh = (struct ppc_link_hash_entry *) h;
7149 if (eh->is_func_descriptor)
7150 {
7151 struct ppc_link_hash_entry *fh = eh->oh;
7152
7153 if (fh == NULL)
7154 {
7155 const char *p, *q;
7156 struct ppc_link_hash_table *htab;
7157 char save;
7158
7159 /* We aren't supposed to use alloca in BFD because on
7160 systems which do not have alloca the version in libiberty
7161 calls xmalloc, which might cause the program to crash
7162 when it runs out of memory. This function doesn't have a
7163 return status, so there's no way to gracefully return an
7164 error. So cheat. We know that string[-1] can be safely
7165 accessed; It's either a string in an ELF string table,
7166 or allocated in an objalloc structure. */
7167
7168 p = eh->elf.root.root.string - 1;
7169 save = *p;
7170 *(char *) p = '.';
7171 htab = ppc_hash_table (info);
7172 if (htab == NULL)
7173 return;
7174
7175 fh = (struct ppc_link_hash_entry *)
7176 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7177 *(char *) p = save;
7178
7179 /* Unfortunately, if it so happens that the string we were
7180 looking for was allocated immediately before this string,
7181 then we overwrote the string terminator. That's the only
7182 reason the lookup should fail. */
7183 if (fh == NULL)
7184 {
7185 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7186 while (q >= eh->elf.root.root.string && *q == *p)
7187 --q, --p;
7188 if (q < eh->elf.root.root.string && *p == '.')
7189 fh = (struct ppc_link_hash_entry *)
7190 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7191 }
7192 if (fh != NULL)
7193 {
7194 eh->oh = fh;
7195 fh->oh = eh;
7196 }
7197 }
7198 if (fh != NULL)
7199 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7200 }
7201}
7202
7203static bfd_boolean
7204get_sym_h (struct elf_link_hash_entry **hp,
7205 Elf_Internal_Sym **symp,
7206 asection **symsecp,
7207 unsigned char **tls_maskp,
7208 Elf_Internal_Sym **locsymsp,
7209 unsigned long r_symndx,
7210 bfd *ibfd)
7211{
7212 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7213
7214 if (r_symndx >= symtab_hdr->sh_info)
7215 {
7216 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7217 struct elf_link_hash_entry *h;
7218
7219 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7220 h = elf_follow_link (h);
7221
7222 if (hp != NULL)
7223 *hp = h;
7224
7225 if (symp != NULL)
7226 *symp = NULL;
7227
7228 if (symsecp != NULL)
7229 {
7230 asection *symsec = NULL;
7231 if (h->root.type == bfd_link_hash_defined
7232 || h->root.type == bfd_link_hash_defweak)
7233 symsec = h->root.u.def.section;
7234 *symsecp = symsec;
7235 }
7236
7237 if (tls_maskp != NULL)
7238 {
7239 struct ppc_link_hash_entry *eh;
7240
7241 eh = (struct ppc_link_hash_entry *) h;
7242 *tls_maskp = &eh->tls_mask;
7243 }
7244 }
7245 else
7246 {
7247 Elf_Internal_Sym *sym;
7248 Elf_Internal_Sym *locsyms = *locsymsp;
7249
7250 if (locsyms == NULL)
7251 {
7252 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7253 if (locsyms == NULL)
7254 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7255 symtab_hdr->sh_info,
7256 0, NULL, NULL, NULL);
7257 if (locsyms == NULL)
7258 return FALSE;
7259 *locsymsp = locsyms;
7260 }
7261 sym = locsyms + r_symndx;
7262
7263 if (hp != NULL)
7264 *hp = NULL;
7265
7266 if (symp != NULL)
7267 *symp = sym;
7268
7269 if (symsecp != NULL)
7270 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7271
7272 if (tls_maskp != NULL)
7273 {
7274 struct got_entry **lgot_ents;
7275 unsigned char *tls_mask;
7276
7277 tls_mask = NULL;
7278 lgot_ents = elf_local_got_ents (ibfd);
7279 if (lgot_ents != NULL)
7280 {
7281 struct plt_entry **local_plt = (struct plt_entry **)
7282 (lgot_ents + symtab_hdr->sh_info);
7283 unsigned char *lgot_masks = (unsigned char *)
7284 (local_plt + symtab_hdr->sh_info);
7285 tls_mask = &lgot_masks[r_symndx];
7286 }
7287 *tls_maskp = tls_mask;
7288 }
7289 }
7290 return TRUE;
7291}
7292
7293/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7294 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7295 type suitable for optimization, and 1 otherwise. */
7296
7297static int
7298get_tls_mask (unsigned char **tls_maskp,
7299 unsigned long *toc_symndx,
7300 bfd_vma *toc_addend,
7301 Elf_Internal_Sym **locsymsp,
7302 const Elf_Internal_Rela *rel,
7303 bfd *ibfd)
7304{
7305 unsigned long r_symndx;
7306 int next_r;
7307 struct elf_link_hash_entry *h;
7308 Elf_Internal_Sym *sym;
7309 asection *sec;
7310 bfd_vma off;
7311
7312 r_symndx = ELF64_R_SYM (rel->r_info);
7313 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7314 return 0;
7315
7316 if ((*tls_maskp != NULL && **tls_maskp != 0)
7317 || sec == NULL
7318 || ppc64_elf_section_data (sec) == NULL
7319 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7320 return 1;
7321
7322 /* Look inside a TOC section too. */
7323 if (h != NULL)
7324 {
7325 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7326 off = h->root.u.def.value;
7327 }
7328 else
7329 off = sym->st_value;
7330 off += rel->r_addend;
7331 BFD_ASSERT (off % 8 == 0);
7332 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7333 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7334 if (toc_symndx != NULL)
7335 *toc_symndx = r_symndx;
7336 if (toc_addend != NULL)
7337 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7338 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7339 return 0;
7340 if ((h == NULL || is_static_defined (h))
7341 && (next_r == -1 || next_r == -2))
7342 return 1 - next_r;
7343 return 1;
7344}
7345
7346/* Find (or create) an entry in the tocsave hash table. */
7347
7348static struct tocsave_entry *
7349tocsave_find (struct ppc_link_hash_table *htab,
7350 enum insert_option insert,
7351 Elf_Internal_Sym **local_syms,
7352 const Elf_Internal_Rela *irela,
7353 bfd *ibfd)
7354{
7355 unsigned long r_indx;
7356 struct elf_link_hash_entry *h;
7357 Elf_Internal_Sym *sym;
7358 struct tocsave_entry ent, *p;
7359 hashval_t hash;
7360 struct tocsave_entry **slot;
7361
7362 r_indx = ELF64_R_SYM (irela->r_info);
7363 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7364 return NULL;
7365 if (ent.sec == NULL || ent.sec->output_section == NULL)
7366 {
7367 (*_bfd_error_handler)
7368 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7369 return NULL;
7370 }
7371
7372 if (h != NULL)
7373 ent.offset = h->root.u.def.value;
7374 else
7375 ent.offset = sym->st_value;
7376 ent.offset += irela->r_addend;
7377
7378 hash = tocsave_htab_hash (&ent);
7379 slot = ((struct tocsave_entry **)
7380 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7381 if (slot == NULL)
7382 return NULL;
7383
7384 if (*slot == NULL)
7385 {
7386 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7387 if (p == NULL)
7388 return NULL;
7389 *p = ent;
7390 *slot = p;
7391 }
7392 return *slot;
7393}
7394
7395/* Adjust all global syms defined in opd sections. In gcc generated
7396 code for the old ABI, these will already have been done. */
7397
7398static bfd_boolean
7399adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7400{
7401 struct ppc_link_hash_entry *eh;
7402 asection *sym_sec;
7403 struct _opd_sec_data *opd;
7404
7405 if (h->root.type == bfd_link_hash_indirect)
7406 return TRUE;
7407
7408 if (h->root.type != bfd_link_hash_defined
7409 && h->root.type != bfd_link_hash_defweak)
7410 return TRUE;
7411
7412 eh = (struct ppc_link_hash_entry *) h;
7413 if (eh->adjust_done)
7414 return TRUE;
7415
7416 sym_sec = eh->elf.root.u.def.section;
7417 opd = get_opd_info (sym_sec);
7418 if (opd != NULL && opd->adjust != NULL)
7419 {
7420 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7421 if (adjust == -1)
7422 {
7423 /* This entry has been deleted. */
7424 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7425 if (dsec == NULL)
7426 {
7427 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7428 if (discarded_section (dsec))
7429 {
7430 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7431 break;
7432 }
7433 }
7434 eh->elf.root.u.def.value = 0;
7435 eh->elf.root.u.def.section = dsec;
7436 }
7437 else
7438 eh->elf.root.u.def.value += adjust;
7439 eh->adjust_done = 1;
7440 }
7441 return TRUE;
7442}
7443
7444/* Handles decrementing dynamic reloc counts for the reloc specified by
7445 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7446 have already been determined. */
7447
7448static bfd_boolean
7449dec_dynrel_count (bfd_vma r_info,
7450 asection *sec,
7451 struct bfd_link_info *info,
7452 Elf_Internal_Sym **local_syms,
7453 struct elf_link_hash_entry *h,
7454 Elf_Internal_Sym *sym)
7455{
7456 enum elf_ppc64_reloc_type r_type;
7457 asection *sym_sec = NULL;
7458
7459 /* Can this reloc be dynamic? This switch, and later tests here
7460 should be kept in sync with the code in check_relocs. */
7461 r_type = ELF64_R_TYPE (r_info);
7462 switch (r_type)
7463 {
7464 default:
7465 return TRUE;
7466
7467 case R_PPC64_TPREL16:
7468 case R_PPC64_TPREL16_LO:
7469 case R_PPC64_TPREL16_HI:
7470 case R_PPC64_TPREL16_HA:
7471 case R_PPC64_TPREL16_DS:
7472 case R_PPC64_TPREL16_LO_DS:
7473 case R_PPC64_TPREL16_HIGH:
7474 case R_PPC64_TPREL16_HIGHA:
7475 case R_PPC64_TPREL16_HIGHER:
7476 case R_PPC64_TPREL16_HIGHERA:
7477 case R_PPC64_TPREL16_HIGHEST:
7478 case R_PPC64_TPREL16_HIGHESTA:
7479 if (!info->shared)
7480 return TRUE;
7481
7482 case R_PPC64_TPREL64:
7483 case R_PPC64_DTPMOD64:
7484 case R_PPC64_DTPREL64:
7485 case R_PPC64_ADDR64:
7486 case R_PPC64_REL30:
7487 case R_PPC64_REL32:
7488 case R_PPC64_REL64:
7489 case R_PPC64_ADDR14:
7490 case R_PPC64_ADDR14_BRNTAKEN:
7491 case R_PPC64_ADDR14_BRTAKEN:
7492 case R_PPC64_ADDR16:
7493 case R_PPC64_ADDR16_DS:
7494 case R_PPC64_ADDR16_HA:
7495 case R_PPC64_ADDR16_HI:
7496 case R_PPC64_ADDR16_HIGH:
7497 case R_PPC64_ADDR16_HIGHA:
7498 case R_PPC64_ADDR16_HIGHER:
7499 case R_PPC64_ADDR16_HIGHERA:
7500 case R_PPC64_ADDR16_HIGHEST:
7501 case R_PPC64_ADDR16_HIGHESTA:
7502 case R_PPC64_ADDR16_LO:
7503 case R_PPC64_ADDR16_LO_DS:
7504 case R_PPC64_ADDR24:
7505 case R_PPC64_ADDR32:
7506 case R_PPC64_UADDR16:
7507 case R_PPC64_UADDR32:
7508 case R_PPC64_UADDR64:
7509 case R_PPC64_TOC:
7510 break;
7511 }
7512
7513 if (local_syms != NULL)
7514 {
7515 unsigned long r_symndx;
7516 bfd *ibfd = sec->owner;
7517
7518 r_symndx = ELF64_R_SYM (r_info);
7519 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7520 return FALSE;
7521 }
7522
7523 if ((info->shared
7524 && (must_be_dyn_reloc (info, r_type)
7525 || (h != NULL
7526 && (!SYMBOLIC_BIND (info, h)
7527 || h->root.type == bfd_link_hash_defweak
7528 || !h->def_regular))))
7529 || (ELIMINATE_COPY_RELOCS
7530 && !info->shared
7531 && h != NULL
7532 && (h->root.type == bfd_link_hash_defweak
7533 || !h->def_regular)))
7534 ;
7535 else
7536 return TRUE;
7537
7538 if (h != NULL)
7539 {
7540 struct elf_dyn_relocs *p;
7541 struct elf_dyn_relocs **pp;
7542 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7543
7544 /* elf_gc_sweep may have already removed all dyn relocs associated
7545 with local syms for a given section. Also, symbol flags are
7546 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7547 report a dynreloc miscount. */
7548 if (*pp == NULL && info->gc_sections)
7549 return TRUE;
7550
7551 while ((p = *pp) != NULL)
7552 {
7553 if (p->sec == sec)
7554 {
7555 if (!must_be_dyn_reloc (info, r_type))
7556 p->pc_count -= 1;
7557 p->count -= 1;
7558 if (p->count == 0)
7559 *pp = p->next;
7560 return TRUE;
7561 }
7562 pp = &p->next;
7563 }
7564 }
7565 else
7566 {
7567 struct ppc_dyn_relocs *p;
7568 struct ppc_dyn_relocs **pp;
7569 void *vpp;
7570 bfd_boolean is_ifunc;
7571
7572 if (local_syms == NULL)
7573 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7574 if (sym_sec == NULL)
7575 sym_sec = sec;
7576
7577 vpp = &elf_section_data (sym_sec)->local_dynrel;
7578 pp = (struct ppc_dyn_relocs **) vpp;
7579
7580 if (*pp == NULL && info->gc_sections)
7581 return TRUE;
7582
7583 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7584 while ((p = *pp) != NULL)
7585 {
7586 if (p->sec == sec && p->ifunc == is_ifunc)
7587 {
7588 p->count -= 1;
7589 if (p->count == 0)
7590 *pp = p->next;
7591 return TRUE;
7592 }
7593 pp = &p->next;
7594 }
7595 }
7596
7597 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7598 sec->owner, sec);
7599 bfd_set_error (bfd_error_bad_value);
7600 return FALSE;
7601}
7602
7603/* Remove unused Official Procedure Descriptor entries. Currently we
7604 only remove those associated with functions in discarded link-once
7605 sections, or weakly defined functions that have been overridden. It
7606 would be possible to remove many more entries for statically linked
7607 applications. */
7608
7609bfd_boolean
7610ppc64_elf_edit_opd (struct bfd_link_info *info)
7611{
7612 bfd *ibfd;
7613 bfd_boolean some_edited = FALSE;
7614 asection *need_pad = NULL;
7615 struct ppc_link_hash_table *htab;
7616
7617 htab = ppc_hash_table (info);
7618 if (htab == NULL)
7619 return FALSE;
7620
7621 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7622 {
7623 asection *sec;
7624 Elf_Internal_Rela *relstart, *rel, *relend;
7625 Elf_Internal_Shdr *symtab_hdr;
7626 Elf_Internal_Sym *local_syms;
7627 struct _opd_sec_data *opd;
7628 bfd_boolean need_edit, add_aux_fields, broken;
7629 bfd_size_type cnt_16b = 0;
7630
7631 if (!is_ppc64_elf (ibfd))
7632 continue;
7633
7634 sec = bfd_get_section_by_name (ibfd, ".opd");
7635 if (sec == NULL || sec->size == 0)
7636 continue;
7637
7638 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7639 continue;
7640
7641 if (sec->output_section == bfd_abs_section_ptr)
7642 continue;
7643
7644 /* Look through the section relocs. */
7645 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7646 continue;
7647
7648 local_syms = NULL;
7649 symtab_hdr = &elf_symtab_hdr (ibfd);
7650
7651 /* Read the relocations. */
7652 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7653 info->keep_memory);
7654 if (relstart == NULL)
7655 return FALSE;
7656
7657 /* First run through the relocs to check they are sane, and to
7658 determine whether we need to edit this opd section. */
7659 need_edit = FALSE;
7660 broken = FALSE;
7661 need_pad = sec;
7662 relend = relstart + sec->reloc_count;
7663 for (rel = relstart; rel < relend; )
7664 {
7665 enum elf_ppc64_reloc_type r_type;
7666 unsigned long r_symndx;
7667 asection *sym_sec;
7668 struct elf_link_hash_entry *h;
7669 Elf_Internal_Sym *sym;
7670 bfd_vma offset;
7671
7672 /* .opd contains an array of 16 or 24 byte entries. We're
7673 only interested in the reloc pointing to a function entry
7674 point. */
7675 offset = rel->r_offset;
7676 if (rel + 1 == relend
7677 || rel[1].r_offset != offset + 8)
7678 {
7679 /* If someone messes with .opd alignment then after a
7680 "ld -r" we might have padding in the middle of .opd.
7681 Also, there's nothing to prevent someone putting
7682 something silly in .opd with the assembler. No .opd
7683 optimization for them! */
7684 broken_opd:
7685 (*_bfd_error_handler)
7686 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7687 broken = TRUE;
7688 break;
7689 }
7690
7691 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7692 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7693 {
7694 (*_bfd_error_handler)
7695 (_("%B: unexpected reloc type %u in .opd section"),
7696 ibfd, r_type);
7697 broken = TRUE;
7698 break;
7699 }
7700
7701 r_symndx = ELF64_R_SYM (rel->r_info);
7702 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7703 r_symndx, ibfd))
7704 goto error_ret;
7705
7706 if (sym_sec == NULL || sym_sec->owner == NULL)
7707 {
7708 const char *sym_name;
7709 if (h != NULL)
7710 sym_name = h->root.root.string;
7711 else
7712 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7713 sym_sec);
7714
7715 (*_bfd_error_handler)
7716 (_("%B: undefined sym `%s' in .opd section"),
7717 ibfd, sym_name);
7718 broken = TRUE;
7719 break;
7720 }
7721
7722 /* opd entries are always for functions defined in the
7723 current input bfd. If the symbol isn't defined in the
7724 input bfd, then we won't be using the function in this
7725 bfd; It must be defined in a linkonce section in another
7726 bfd, or is weak. It's also possible that we are
7727 discarding the function due to a linker script /DISCARD/,
7728 which we test for via the output_section. */
7729 if (sym_sec->owner != ibfd
7730 || sym_sec->output_section == bfd_abs_section_ptr)
7731 need_edit = TRUE;
7732
7733 rel += 2;
7734 if (rel + 1 == relend
7735 || (rel + 2 < relend
7736 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7737 ++rel;
7738
7739 if (rel == relend)
7740 {
7741 if (sec->size == offset + 24)
7742 {
7743 need_pad = NULL;
7744 break;
7745 }
7746 if (sec->size == offset + 16)
7747 {
7748 cnt_16b++;
7749 break;
7750 }
7751 goto broken_opd;
7752 }
7753 else if (rel + 1 < relend
7754 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7755 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7756 {
7757 if (rel[0].r_offset == offset + 16)
7758 cnt_16b++;
7759 else if (rel[0].r_offset != offset + 24)
7760 goto broken_opd;
7761 }
7762 else
7763 goto broken_opd;
7764 }
7765
7766 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7767
7768 if (!broken && (need_edit || add_aux_fields))
7769 {
7770 Elf_Internal_Rela *write_rel;
7771 Elf_Internal_Shdr *rel_hdr;
7772 bfd_byte *rptr, *wptr;
7773 bfd_byte *new_contents;
7774 bfd_size_type amt;
7775
7776 new_contents = NULL;
7777 amt = OPD_NDX (sec->size) * sizeof (long);
7778 opd = &ppc64_elf_section_data (sec)->u.opd;
7779 opd->adjust = bfd_zalloc (sec->owner, amt);
7780 if (opd->adjust == NULL)
7781 return FALSE;
7782 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7783
7784 /* This seems a waste of time as input .opd sections are all
7785 zeros as generated by gcc, but I suppose there's no reason
7786 this will always be so. We might start putting something in
7787 the third word of .opd entries. */
7788 if ((sec->flags & SEC_IN_MEMORY) == 0)
7789 {
7790 bfd_byte *loc;
7791 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7792 {
7793 if (loc != NULL)
7794 free (loc);
7795 error_ret:
7796 if (local_syms != NULL
7797 && symtab_hdr->contents != (unsigned char *) local_syms)
7798 free (local_syms);
7799 if (elf_section_data (sec)->relocs != relstart)
7800 free (relstart);
7801 return FALSE;
7802 }
7803 sec->contents = loc;
7804 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7805 }
7806
7807 elf_section_data (sec)->relocs = relstart;
7808
7809 new_contents = sec->contents;
7810 if (add_aux_fields)
7811 {
7812 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7813 if (new_contents == NULL)
7814 return FALSE;
7815 need_pad = NULL;
7816 }
7817 wptr = new_contents;
7818 rptr = sec->contents;
7819 write_rel = relstart;
7820 for (rel = relstart; rel < relend; )
7821 {
7822 unsigned long r_symndx;
7823 asection *sym_sec;
7824 struct elf_link_hash_entry *h;
7825 struct ppc_link_hash_entry *fdh = NULL;
7826 Elf_Internal_Sym *sym;
7827 long opd_ent_size;
7828 Elf_Internal_Rela *next_rel;
7829 bfd_boolean skip;
7830
7831 r_symndx = ELF64_R_SYM (rel->r_info);
7832 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7833 r_symndx, ibfd))
7834 goto error_ret;
7835
7836 next_rel = rel + 2;
7837 if (next_rel + 1 == relend
7838 || (next_rel + 2 < relend
7839 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
7840 ++next_rel;
7841
7842 /* See if the .opd entry is full 24 byte or
7843 16 byte (with fd_aux entry overlapped with next
7844 fd_func). */
7845 opd_ent_size = 24;
7846 if (next_rel == relend)
7847 {
7848 if (sec->size == rel->r_offset + 16)
7849 opd_ent_size = 16;
7850 }
7851 else if (next_rel->r_offset == rel->r_offset + 16)
7852 opd_ent_size = 16;
7853
7854 if (h != NULL
7855 && h->root.root.string[0] == '.')
7856 {
7857 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7858 if (fdh != NULL
7859 && fdh->elf.root.type != bfd_link_hash_defined
7860 && fdh->elf.root.type != bfd_link_hash_defweak)
7861 fdh = NULL;
7862 }
7863
7864 skip = (sym_sec->owner != ibfd
7865 || sym_sec->output_section == bfd_abs_section_ptr);
7866 if (skip)
7867 {
7868 if (fdh != NULL && sym_sec->owner == ibfd)
7869 {
7870 /* Arrange for the function descriptor sym
7871 to be dropped. */
7872 fdh->elf.root.u.def.value = 0;
7873 fdh->elf.root.u.def.section = sym_sec;
7874 }
7875 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
7876
7877 if (NO_OPD_RELOCS || info->relocatable)
7878 rel = next_rel;
7879 else
7880 while (1)
7881 {
7882 if (!dec_dynrel_count (rel->r_info, sec, info,
7883 NULL, h, sym))
7884 goto error_ret;
7885
7886 if (++rel == next_rel)
7887 break;
7888
7889 r_symndx = ELF64_R_SYM (rel->r_info);
7890 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7891 r_symndx, ibfd))
7892 goto error_ret;
7893 }
7894 }
7895 else
7896 {
7897 /* We'll be keeping this opd entry. */
7898 long adjust;
7899
7900 if (fdh != NULL)
7901 {
7902 /* Redefine the function descriptor symbol to
7903 this location in the opd section. It is
7904 necessary to update the value here rather
7905 than using an array of adjustments as we do
7906 for local symbols, because various places
7907 in the generic ELF code use the value
7908 stored in u.def.value. */
7909 fdh->elf.root.u.def.value = wptr - new_contents;
7910 fdh->adjust_done = 1;
7911 }
7912
7913 /* Local syms are a bit tricky. We could
7914 tweak them as they can be cached, but
7915 we'd need to look through the local syms
7916 for the function descriptor sym which we
7917 don't have at the moment. So keep an
7918 array of adjustments. */
7919 adjust = (wptr - new_contents) - (rptr - sec->contents);
7920 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
7921
7922 if (wptr != rptr)
7923 memcpy (wptr, rptr, opd_ent_size);
7924 wptr += opd_ent_size;
7925 if (add_aux_fields && opd_ent_size == 16)
7926 {
7927 memset (wptr, '\0', 8);
7928 wptr += 8;
7929 }
7930
7931 /* We need to adjust any reloc offsets to point to the
7932 new opd entries. */
7933 for ( ; rel != next_rel; ++rel)
7934 {
7935 rel->r_offset += adjust;
7936 if (write_rel != rel)
7937 memcpy (write_rel, rel, sizeof (*rel));
7938 ++write_rel;
7939 }
7940 }
7941
7942 rptr += opd_ent_size;
7943 }
7944
7945 sec->size = wptr - new_contents;
7946 sec->reloc_count = write_rel - relstart;
7947 if (add_aux_fields)
7948 {
7949 free (sec->contents);
7950 sec->contents = new_contents;
7951 }
7952
7953 /* Fudge the header size too, as this is used later in
7954 elf_bfd_final_link if we are emitting relocs. */
7955 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7956 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7957 some_edited = TRUE;
7958 }
7959 else if (elf_section_data (sec)->relocs != relstart)
7960 free (relstart);
7961
7962 if (local_syms != NULL
7963 && symtab_hdr->contents != (unsigned char *) local_syms)
7964 {
7965 if (!info->keep_memory)
7966 free (local_syms);
7967 else
7968 symtab_hdr->contents = (unsigned char *) local_syms;
7969 }
7970 }
7971
7972 if (some_edited)
7973 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7974
7975 /* If we are doing a final link and the last .opd entry is just 16 byte
7976 long, add a 8 byte padding after it. */
7977 if (need_pad != NULL && !info->relocatable)
7978 {
7979 bfd_byte *p;
7980
7981 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7982 {
7983 BFD_ASSERT (need_pad->size > 0);
7984
7985 p = bfd_malloc (need_pad->size + 8);
7986 if (p == NULL)
7987 return FALSE;
7988
7989 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7990 p, 0, need_pad->size))
7991 return FALSE;
7992
7993 need_pad->contents = p;
7994 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7995 }
7996 else
7997 {
7998 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7999 if (p == NULL)
8000 return FALSE;
8001
8002 need_pad->contents = p;
8003 }
8004
8005 memset (need_pad->contents + need_pad->size, 0, 8);
8006 need_pad->size += 8;
8007 }
8008
8009 return TRUE;
8010}
8011
8012/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8013
8014asection *
8015ppc64_elf_tls_setup (struct bfd_link_info *info)
8016{
8017 struct ppc_link_hash_table *htab;
8018
8019 htab = ppc_hash_table (info);
8020 if (htab == NULL)
8021 return NULL;
8022
8023 if (abiversion (info->output_bfd) == 1)
8024 htab->opd_abi = 1;
8025
8026 if (htab->params->no_multi_toc)
8027 htab->do_multi_toc = 0;
8028 else if (!htab->do_multi_toc)
8029 htab->params->no_multi_toc = 1;
8030
8031 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8032 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8033 FALSE, FALSE, TRUE));
8034 /* Move dynamic linking info to the function descriptor sym. */
8035 if (htab->tls_get_addr != NULL)
8036 func_desc_adjust (&htab->tls_get_addr->elf, info);
8037 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8038 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8039 FALSE, FALSE, TRUE));
8040 if (!htab->params->no_tls_get_addr_opt)
8041 {
8042 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8043
8044 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8045 FALSE, FALSE, TRUE);
8046 if (opt != NULL)
8047 func_desc_adjust (opt, info);
8048 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8049 FALSE, FALSE, TRUE);
8050 if (opt_fd != NULL
8051 && (opt_fd->root.type == bfd_link_hash_defined
8052 || opt_fd->root.type == bfd_link_hash_defweak))
8053 {
8054 /* If glibc supports an optimized __tls_get_addr call stub,
8055 signalled by the presence of __tls_get_addr_opt, and we'll
8056 be calling __tls_get_addr via a plt call stub, then
8057 make __tls_get_addr point to __tls_get_addr_opt. */
8058 tga_fd = &htab->tls_get_addr_fd->elf;
8059 if (htab->elf.dynamic_sections_created
8060 && tga_fd != NULL
8061 && (tga_fd->type == STT_FUNC
8062 || tga_fd->needs_plt)
8063 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8064 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8065 && tga_fd->root.type == bfd_link_hash_undefweak)))
8066 {
8067 struct plt_entry *ent;
8068
8069 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8070 if (ent->plt.refcount > 0)
8071 break;
8072 if (ent != NULL)
8073 {
8074 tga_fd->root.type = bfd_link_hash_indirect;
8075 tga_fd->root.u.i.link = &opt_fd->root;
8076 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8077 if (opt_fd->dynindx != -1)
8078 {
8079 /* Use __tls_get_addr_opt in dynamic relocations. */
8080 opt_fd->dynindx = -1;
8081 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8082 opt_fd->dynstr_index);
8083 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8084 return NULL;
8085 }
8086 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8087 tga = &htab->tls_get_addr->elf;
8088 if (opt != NULL && tga != NULL)
8089 {
8090 tga->root.type = bfd_link_hash_indirect;
8091 tga->root.u.i.link = &opt->root;
8092 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8093 _bfd_elf_link_hash_hide_symbol (info, opt,
8094 tga->forced_local);
8095 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8096 }
8097 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8098 htab->tls_get_addr_fd->is_func_descriptor = 1;
8099 if (htab->tls_get_addr != NULL)
8100 {
8101 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8102 htab->tls_get_addr->is_func = 1;
8103 }
8104 }
8105 }
8106 }
8107 else
8108 htab->params->no_tls_get_addr_opt = TRUE;
8109 }
8110 return _bfd_elf_tls_setup (info->output_bfd, info);
8111}
8112
8113/* Return TRUE iff REL is a branch reloc with a global symbol matching
8114 HASH1 or HASH2. */
8115
8116static bfd_boolean
8117branch_reloc_hash_match (const bfd *ibfd,
8118 const Elf_Internal_Rela *rel,
8119 const struct ppc_link_hash_entry *hash1,
8120 const struct ppc_link_hash_entry *hash2)
8121{
8122 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8123 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8124 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8125
8126 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8127 {
8128 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8129 struct elf_link_hash_entry *h;
8130
8131 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8132 h = elf_follow_link (h);
8133 if (h == &hash1->elf || h == &hash2->elf)
8134 return TRUE;
8135 }
8136 return FALSE;
8137}
8138
8139/* Run through all the TLS relocs looking for optimization
8140 opportunities. The linker has been hacked (see ppc64elf.em) to do
8141 a preliminary section layout so that we know the TLS segment
8142 offsets. We can't optimize earlier because some optimizations need
8143 to know the tp offset, and we need to optimize before allocating
8144 dynamic relocations. */
8145
8146bfd_boolean
8147ppc64_elf_tls_optimize (struct bfd_link_info *info)
8148{
8149 bfd *ibfd;
8150 asection *sec;
8151 struct ppc_link_hash_table *htab;
8152 unsigned char *toc_ref;
8153 int pass;
8154
8155 if (info->relocatable || !info->executable)
8156 return TRUE;
8157
8158 htab = ppc_hash_table (info);
8159 if (htab == NULL)
8160 return FALSE;
8161
8162 /* Make two passes over the relocs. On the first pass, mark toc
8163 entries involved with tls relocs, and check that tls relocs
8164 involved in setting up a tls_get_addr call are indeed followed by
8165 such a call. If they are not, we can't do any tls optimization.
8166 On the second pass twiddle tls_mask flags to notify
8167 relocate_section that optimization can be done, and adjust got
8168 and plt refcounts. */
8169 toc_ref = NULL;
8170 for (pass = 0; pass < 2; ++pass)
8171 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8172 {
8173 Elf_Internal_Sym *locsyms = NULL;
8174 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8175
8176 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8177 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8178 {
8179 Elf_Internal_Rela *relstart, *rel, *relend;
8180 bfd_boolean found_tls_get_addr_arg = 0;
8181
8182 /* Read the relocations. */
8183 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8184 info->keep_memory);
8185 if (relstart == NULL)
8186 {
8187 free (toc_ref);
8188 return FALSE;
8189 }
8190
8191 relend = relstart + sec->reloc_count;
8192 for (rel = relstart; rel < relend; rel++)
8193 {
8194 enum elf_ppc64_reloc_type r_type;
8195 unsigned long r_symndx;
8196 struct elf_link_hash_entry *h;
8197 Elf_Internal_Sym *sym;
8198 asection *sym_sec;
8199 unsigned char *tls_mask;
8200 unsigned char tls_set, tls_clear, tls_type = 0;
8201 bfd_vma value;
8202 bfd_boolean ok_tprel, is_local;
8203 long toc_ref_index = 0;
8204 int expecting_tls_get_addr = 0;
8205 bfd_boolean ret = FALSE;
8206
8207 r_symndx = ELF64_R_SYM (rel->r_info);
8208 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8209 r_symndx, ibfd))
8210 {
8211 err_free_rel:
8212 if (elf_section_data (sec)->relocs != relstart)
8213 free (relstart);
8214 if (toc_ref != NULL)
8215 free (toc_ref);
8216 if (locsyms != NULL
8217 && (elf_symtab_hdr (ibfd).contents
8218 != (unsigned char *) locsyms))
8219 free (locsyms);
8220 return ret;
8221 }
8222
8223 if (h != NULL)
8224 {
8225 if (h->root.type == bfd_link_hash_defined
8226 || h->root.type == bfd_link_hash_defweak)
8227 value = h->root.u.def.value;
8228 else if (h->root.type == bfd_link_hash_undefweak)
8229 value = 0;
8230 else
8231 {
8232 found_tls_get_addr_arg = 0;
8233 continue;
8234 }
8235 }
8236 else
8237 /* Symbols referenced by TLS relocs must be of type
8238 STT_TLS. So no need for .opd local sym adjust. */
8239 value = sym->st_value;
8240
8241 ok_tprel = FALSE;
8242 is_local = FALSE;
8243 if (h == NULL
8244 || !h->def_dynamic)
8245 {
8246 is_local = TRUE;
8247 if (h != NULL
8248 && h->root.type == bfd_link_hash_undefweak)
8249 ok_tprel = TRUE;
8250 else
8251 {
8252 value += sym_sec->output_offset;
8253 value += sym_sec->output_section->vma;
8254 value -= htab->elf.tls_sec->vma;
8255 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8256 < (bfd_vma) 1 << 32);
8257 }
8258 }
8259
8260 r_type = ELF64_R_TYPE (rel->r_info);
8261 /* If this section has old-style __tls_get_addr calls
8262 without marker relocs, then check that each
8263 __tls_get_addr call reloc is preceded by a reloc
8264 that conceivably belongs to the __tls_get_addr arg
8265 setup insn. If we don't find matching arg setup
8266 relocs, don't do any tls optimization. */
8267 if (pass == 0
8268 && sec->has_tls_get_addr_call
8269 && h != NULL
8270 && (h == &htab->tls_get_addr->elf
8271 || h == &htab->tls_get_addr_fd->elf)
8272 && !found_tls_get_addr_arg
8273 && is_branch_reloc (r_type))
8274 {
8275 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8276 "TLS optimization disabled\n"),
8277 ibfd, sec, rel->r_offset);
8278 ret = TRUE;
8279 goto err_free_rel;
8280 }
8281
8282 found_tls_get_addr_arg = 0;
8283 switch (r_type)
8284 {
8285 case R_PPC64_GOT_TLSLD16:
8286 case R_PPC64_GOT_TLSLD16_LO:
8287 expecting_tls_get_addr = 1;
8288 found_tls_get_addr_arg = 1;
8289 /* Fall thru */
8290
8291 case R_PPC64_GOT_TLSLD16_HI:
8292 case R_PPC64_GOT_TLSLD16_HA:
8293 /* These relocs should never be against a symbol
8294 defined in a shared lib. Leave them alone if
8295 that turns out to be the case. */
8296 if (!is_local)
8297 continue;
8298
8299 /* LD -> LE */
8300 tls_set = 0;
8301 tls_clear = TLS_LD;
8302 tls_type = TLS_TLS | TLS_LD;
8303 break;
8304
8305 case R_PPC64_GOT_TLSGD16:
8306 case R_PPC64_GOT_TLSGD16_LO:
8307 expecting_tls_get_addr = 1;
8308 found_tls_get_addr_arg = 1;
8309 /* Fall thru */
8310
8311 case R_PPC64_GOT_TLSGD16_HI:
8312 case R_PPC64_GOT_TLSGD16_HA:
8313 if (ok_tprel)
8314 /* GD -> LE */
8315 tls_set = 0;
8316 else
8317 /* GD -> IE */
8318 tls_set = TLS_TLS | TLS_TPRELGD;
8319 tls_clear = TLS_GD;
8320 tls_type = TLS_TLS | TLS_GD;
8321 break;
8322
8323 case R_PPC64_GOT_TPREL16_DS:
8324 case R_PPC64_GOT_TPREL16_LO_DS:
8325 case R_PPC64_GOT_TPREL16_HI:
8326 case R_PPC64_GOT_TPREL16_HA:
8327 if (ok_tprel)
8328 {
8329 /* IE -> LE */
8330 tls_set = 0;
8331 tls_clear = TLS_TPREL;
8332 tls_type = TLS_TLS | TLS_TPREL;
8333 break;
8334 }
8335 continue;
8336
8337 case R_PPC64_TLSGD:
8338 case R_PPC64_TLSLD:
8339 found_tls_get_addr_arg = 1;
8340 /* Fall thru */
8341
8342 case R_PPC64_TLS:
8343 case R_PPC64_TOC16:
8344 case R_PPC64_TOC16_LO:
8345 if (sym_sec == NULL || sym_sec != toc)
8346 continue;
8347
8348 /* Mark this toc entry as referenced by a TLS
8349 code sequence. We can do that now in the
8350 case of R_PPC64_TLS, and after checking for
8351 tls_get_addr for the TOC16 relocs. */
8352 if (toc_ref == NULL)
8353 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8354 if (toc_ref == NULL)
8355 goto err_free_rel;
8356
8357 if (h != NULL)
8358 value = h->root.u.def.value;
8359 else
8360 value = sym->st_value;
8361 value += rel->r_addend;
8362 if (value % 8 != 0)
8363 continue;
8364 BFD_ASSERT (value < toc->size
8365 && toc->output_offset % 8 == 0);
8366 toc_ref_index = (value + toc->output_offset) / 8;
8367 if (r_type == R_PPC64_TLS
8368 || r_type == R_PPC64_TLSGD
8369 || r_type == R_PPC64_TLSLD)
8370 {
8371 toc_ref[toc_ref_index] = 1;
8372 continue;
8373 }
8374
8375 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8376 continue;
8377
8378 tls_set = 0;
8379 tls_clear = 0;
8380 expecting_tls_get_addr = 2;
8381 break;
8382
8383 case R_PPC64_TPREL64:
8384 if (pass == 0
8385 || sec != toc
8386 || toc_ref == NULL
8387 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8388 continue;
8389 if (ok_tprel)
8390 {
8391 /* IE -> LE */
8392 tls_set = TLS_EXPLICIT;
8393 tls_clear = TLS_TPREL;
8394 break;
8395 }
8396 continue;
8397
8398 case R_PPC64_DTPMOD64:
8399 if (pass == 0
8400 || sec != toc
8401 || toc_ref == NULL
8402 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8403 continue;
8404 if (rel + 1 < relend
8405 && (rel[1].r_info
8406 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8407 && rel[1].r_offset == rel->r_offset + 8)
8408 {
8409 if (ok_tprel)
8410 /* GD -> LE */
8411 tls_set = TLS_EXPLICIT | TLS_GD;
8412 else
8413 /* GD -> IE */
8414 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8415 tls_clear = TLS_GD;
8416 }
8417 else
8418 {
8419 if (!is_local)
8420 continue;
8421
8422 /* LD -> LE */
8423 tls_set = TLS_EXPLICIT;
8424 tls_clear = TLS_LD;
8425 }
8426 break;
8427
8428 default:
8429 continue;
8430 }
8431
8432 if (pass == 0)
8433 {
8434 if (!expecting_tls_get_addr
8435 || !sec->has_tls_get_addr_call)
8436 continue;
8437
8438 if (rel + 1 < relend
8439 && branch_reloc_hash_match (ibfd, rel + 1,
8440 htab->tls_get_addr,
8441 htab->tls_get_addr_fd))
8442 {
8443 if (expecting_tls_get_addr == 2)
8444 {
8445 /* Check for toc tls entries. */
8446 unsigned char *toc_tls;
8447 int retval;
8448
8449 retval = get_tls_mask (&toc_tls, NULL, NULL,
8450 &locsyms,
8451 rel, ibfd);
8452 if (retval == 0)
8453 goto err_free_rel;
8454 if (toc_tls != NULL)
8455 {
8456 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8457 found_tls_get_addr_arg = 1;
8458 if (retval > 1)
8459 toc_ref[toc_ref_index] = 1;
8460 }
8461 }
8462 continue;
8463 }
8464
8465 if (expecting_tls_get_addr != 1)
8466 continue;
8467
8468 /* Uh oh, we didn't find the expected call. We
8469 could just mark this symbol to exclude it
8470 from tls optimization but it's safer to skip
8471 the entire optimization. */
8472 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8473 "TLS optimization disabled\n"),
8474 ibfd, sec, rel->r_offset);
8475 ret = TRUE;
8476 goto err_free_rel;
8477 }
8478
8479 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8480 {
8481 struct plt_entry *ent;
8482 for (ent = htab->tls_get_addr->elf.plt.plist;
8483 ent != NULL;
8484 ent = ent->next)
8485 if (ent->addend == 0)
8486 {
8487 if (ent->plt.refcount > 0)
8488 {
8489 ent->plt.refcount -= 1;
8490 expecting_tls_get_addr = 0;
8491 }
8492 break;
8493 }
8494 }
8495
8496 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8497 {
8498 struct plt_entry *ent;
8499 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8500 ent != NULL;
8501 ent = ent->next)
8502 if (ent->addend == 0)
8503 {
8504 if (ent->plt.refcount > 0)
8505 ent->plt.refcount -= 1;
8506 break;
8507 }
8508 }
8509
8510 if (tls_clear == 0)
8511 continue;
8512
8513 if ((tls_set & TLS_EXPLICIT) == 0)
8514 {
8515 struct got_entry *ent;
8516
8517 /* Adjust got entry for this reloc. */
8518 if (h != NULL)
8519 ent = h->got.glist;
8520 else
8521 ent = elf_local_got_ents (ibfd)[r_symndx];
8522
8523 for (; ent != NULL; ent = ent->next)
8524 if (ent->addend == rel->r_addend
8525 && ent->owner == ibfd
8526 && ent->tls_type == tls_type)
8527 break;
8528 if (ent == NULL)
8529 abort ();
8530
8531 if (tls_set == 0)
8532 {
8533 /* We managed to get rid of a got entry. */
8534 if (ent->got.refcount > 0)
8535 ent->got.refcount -= 1;
8536 }
8537 }
8538 else
8539 {
8540 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8541 we'll lose one or two dyn relocs. */
8542 if (!dec_dynrel_count (rel->r_info, sec, info,
8543 NULL, h, sym))
8544 return FALSE;
8545
8546 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8547 {
8548 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8549 NULL, h, sym))
8550 return FALSE;
8551 }
8552 }
8553
8554 *tls_mask |= tls_set;
8555 *tls_mask &= ~tls_clear;
8556 }
8557
8558 if (elf_section_data (sec)->relocs != relstart)
8559 free (relstart);
8560 }
8561
8562 if (locsyms != NULL
8563 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8564 {
8565 if (!info->keep_memory)
8566 free (locsyms);
8567 else
8568 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8569 }
8570 }
8571
8572 if (toc_ref != NULL)
8573 free (toc_ref);
8574 return TRUE;
8575}
8576
8577/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8578 the values of any global symbols in a toc section that has been
8579 edited. Globals in toc sections should be a rarity, so this function
8580 sets a flag if any are found in toc sections other than the one just
8581 edited, so that futher hash table traversals can be avoided. */
8582
8583struct adjust_toc_info
8584{
8585 asection *toc;
8586 unsigned long *skip;
8587 bfd_boolean global_toc_syms;
8588};
8589
8590enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8591
8592static bfd_boolean
8593adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8594{
8595 struct ppc_link_hash_entry *eh;
8596 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8597 unsigned long i;
8598
8599 if (h->root.type != bfd_link_hash_defined
8600 && h->root.type != bfd_link_hash_defweak)
8601 return TRUE;
8602
8603 eh = (struct ppc_link_hash_entry *) h;
8604 if (eh->adjust_done)
8605 return TRUE;
8606
8607 if (eh->elf.root.u.def.section == toc_inf->toc)
8608 {
8609 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8610 i = toc_inf->toc->rawsize >> 3;
8611 else
8612 i = eh->elf.root.u.def.value >> 3;
8613
8614 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8615 {
8616 (*_bfd_error_handler)
8617 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8618 do
8619 ++i;
8620 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8621 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8622 }
8623
8624 eh->elf.root.u.def.value -= toc_inf->skip[i];
8625 eh->adjust_done = 1;
8626 }
8627 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8628 toc_inf->global_toc_syms = TRUE;
8629
8630 return TRUE;
8631}
8632
8633/* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8634
8635static bfd_boolean
8636ok_lo_toc_insn (unsigned int insn)
8637{
8638 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8639 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8640 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8641 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8642 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8643 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8644 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8645 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8646 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8647 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8648 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8649 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8650 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8651 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8652 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8653 && (insn & 3) != 1)
8654 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8655 && ((insn & 3) == 0 || (insn & 3) == 3))
8656 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8657}
8658
8659/* Examine all relocs referencing .toc sections in order to remove
8660 unused .toc entries. */
8661
8662bfd_boolean
8663ppc64_elf_edit_toc (struct bfd_link_info *info)
8664{
8665 bfd *ibfd;
8666 struct adjust_toc_info toc_inf;
8667 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8668
8669 htab->do_toc_opt = 1;
8670 toc_inf.global_toc_syms = TRUE;
8671 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8672 {
8673 asection *toc, *sec;
8674 Elf_Internal_Shdr *symtab_hdr;
8675 Elf_Internal_Sym *local_syms;
8676 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8677 unsigned long *skip, *drop;
8678 unsigned char *used;
8679 unsigned char *keep, last, some_unused;
8680
8681 if (!is_ppc64_elf (ibfd))
8682 continue;
8683
8684 toc = bfd_get_section_by_name (ibfd, ".toc");
8685 if (toc == NULL
8686 || toc->size == 0
8687 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8688 || discarded_section (toc))
8689 continue;
8690
8691 toc_relocs = NULL;
8692 local_syms = NULL;
8693 symtab_hdr = &elf_symtab_hdr (ibfd);
8694
8695 /* Look at sections dropped from the final link. */
8696 skip = NULL;
8697 relstart = NULL;
8698 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8699 {
8700 if (sec->reloc_count == 0
8701 || !discarded_section (sec)
8702 || get_opd_info (sec)
8703 || (sec->flags & SEC_ALLOC) == 0
8704 || (sec->flags & SEC_DEBUGGING) != 0)
8705 continue;
8706
8707 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8708 if (relstart == NULL)
8709 goto error_ret;
8710
8711 /* Run through the relocs to see which toc entries might be
8712 unused. */
8713 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8714 {
8715 enum elf_ppc64_reloc_type r_type;
8716 unsigned long r_symndx;
8717 asection *sym_sec;
8718 struct elf_link_hash_entry *h;
8719 Elf_Internal_Sym *sym;
8720 bfd_vma val;
8721
8722 r_type = ELF64_R_TYPE (rel->r_info);
8723 switch (r_type)
8724 {
8725 default:
8726 continue;
8727
8728 case R_PPC64_TOC16:
8729 case R_PPC64_TOC16_LO:
8730 case R_PPC64_TOC16_HI:
8731 case R_PPC64_TOC16_HA:
8732 case R_PPC64_TOC16_DS:
8733 case R_PPC64_TOC16_LO_DS:
8734 break;
8735 }
8736
8737 r_symndx = ELF64_R_SYM (rel->r_info);
8738 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8739 r_symndx, ibfd))
8740 goto error_ret;
8741
8742 if (sym_sec != toc)
8743 continue;
8744
8745 if (h != NULL)
8746 val = h->root.u.def.value;
8747 else
8748 val = sym->st_value;
8749 val += rel->r_addend;
8750
8751 if (val >= toc->size)
8752 continue;
8753
8754 /* Anything in the toc ought to be aligned to 8 bytes.
8755 If not, don't mark as unused. */
8756 if (val & 7)
8757 continue;
8758
8759 if (skip == NULL)
8760 {
8761 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8762 if (skip == NULL)
8763 goto error_ret;
8764 }
8765
8766 skip[val >> 3] = ref_from_discarded;
8767 }
8768
8769 if (elf_section_data (sec)->relocs != relstart)
8770 free (relstart);
8771 }
8772
8773 /* For largetoc loads of address constants, we can convert
8774 . addis rx,2,addr@got@ha
8775 . ld ry,addr@got@l(rx)
8776 to
8777 . addis rx,2,addr@toc@ha
8778 . addi ry,rx,addr@toc@l
8779 when addr is within 2G of the toc pointer. This then means
8780 that the word storing "addr" in the toc is no longer needed. */
8781
8782 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8783 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8784 && toc->reloc_count != 0)
8785 {
8786 /* Read toc relocs. */
8787 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8788 info->keep_memory);
8789 if (toc_relocs == NULL)
8790 goto error_ret;
8791
8792 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8793 {
8794 enum elf_ppc64_reloc_type r_type;
8795 unsigned long r_symndx;
8796 asection *sym_sec;
8797 struct elf_link_hash_entry *h;
8798 Elf_Internal_Sym *sym;
8799 bfd_vma val, addr;
8800
8801 r_type = ELF64_R_TYPE (rel->r_info);
8802 if (r_type != R_PPC64_ADDR64)
8803 continue;
8804
8805 r_symndx = ELF64_R_SYM (rel->r_info);
8806 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8807 r_symndx, ibfd))
8808 goto error_ret;
8809
8810 if (sym_sec == NULL
8811 || discarded_section (sym_sec))
8812 continue;
8813
8814 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8815 continue;
8816
8817 if (h != NULL)
8818 {
8819 if (h->type == STT_GNU_IFUNC)
8820 continue;
8821 val = h->root.u.def.value;
8822 }
8823 else
8824 {
8825 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8826 continue;
8827 val = sym->st_value;
8828 }
8829 val += rel->r_addend;
8830 val += sym_sec->output_section->vma + sym_sec->output_offset;
8831
8832 /* We don't yet know the exact toc pointer value, but we
8833 know it will be somewhere in the toc section. Don't
8834 optimize if the difference from any possible toc
8835 pointer is outside [ff..f80008000, 7fff7fff]. */
8836 addr = toc->output_section->vma + TOC_BASE_OFF;
8837 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8838 continue;
8839
8840 addr = toc->output_section->vma + toc->output_section->rawsize;
8841 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8842 continue;
8843
8844 if (skip == NULL)
8845 {
8846 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8847 if (skip == NULL)
8848 goto error_ret;
8849 }
8850
8851 skip[rel->r_offset >> 3]
8852 |= can_optimize | ((rel - toc_relocs) << 2);
8853 }
8854 }
8855
8856 if (skip == NULL)
8857 continue;
8858
8859 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8860 if (used == NULL)
8861 {
8862 error_ret:
8863 if (local_syms != NULL
8864 && symtab_hdr->contents != (unsigned char *) local_syms)
8865 free (local_syms);
8866 if (sec != NULL
8867 && relstart != NULL
8868 && elf_section_data (sec)->relocs != relstart)
8869 free (relstart);
8870 if (toc_relocs != NULL
8871 && elf_section_data (toc)->relocs != toc_relocs)
8872 free (toc_relocs);
8873 if (skip != NULL)
8874 free (skip);
8875 return FALSE;
8876 }
8877
8878 /* Now check all kept sections that might reference the toc.
8879 Check the toc itself last. */
8880 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8881 : ibfd->sections);
8882 sec != NULL;
8883 sec = (sec == toc ? NULL
8884 : sec->next == NULL ? toc
8885 : sec->next == toc && toc->next ? toc->next
8886 : sec->next))
8887 {
8888 int repeat;
8889
8890 if (sec->reloc_count == 0
8891 || discarded_section (sec)
8892 || get_opd_info (sec)
8893 || (sec->flags & SEC_ALLOC) == 0
8894 || (sec->flags & SEC_DEBUGGING) != 0)
8895 continue;
8896
8897 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8898 info->keep_memory);
8899 if (relstart == NULL)
8900 {
8901 free (used);
8902 goto error_ret;
8903 }
8904
8905 /* Mark toc entries referenced as used. */
8906 do
8907 {
8908 repeat = 0;
8909 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8910 {
8911 enum elf_ppc64_reloc_type r_type;
8912 unsigned long r_symndx;
8913 asection *sym_sec;
8914 struct elf_link_hash_entry *h;
8915 Elf_Internal_Sym *sym;
8916 bfd_vma val;
8917 enum {no_check, check_lo, check_ha} insn_check;
8918
8919 r_type = ELF64_R_TYPE (rel->r_info);
8920 switch (r_type)
8921 {
8922 default:
8923 insn_check = no_check;
8924 break;
8925
8926 case R_PPC64_GOT_TLSLD16_HA:
8927 case R_PPC64_GOT_TLSGD16_HA:
8928 case R_PPC64_GOT_TPREL16_HA:
8929 case R_PPC64_GOT_DTPREL16_HA:
8930 case R_PPC64_GOT16_HA:
8931 case R_PPC64_TOC16_HA:
8932 insn_check = check_ha;
8933 break;
8934
8935 case R_PPC64_GOT_TLSLD16_LO:
8936 case R_PPC64_GOT_TLSGD16_LO:
8937 case R_PPC64_GOT_TPREL16_LO_DS:
8938 case R_PPC64_GOT_DTPREL16_LO_DS:
8939 case R_PPC64_GOT16_LO:
8940 case R_PPC64_GOT16_LO_DS:
8941 case R_PPC64_TOC16_LO:
8942 case R_PPC64_TOC16_LO_DS:
8943 insn_check = check_lo;
8944 break;
8945 }
8946
8947 if (insn_check != no_check)
8948 {
8949 bfd_vma off = rel->r_offset & ~3;
8950 unsigned char buf[4];
8951 unsigned int insn;
8952
8953 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8954 {
8955 free (used);
8956 goto error_ret;
8957 }
8958 insn = bfd_get_32 (ibfd, buf);
8959 if (insn_check == check_lo
8960 ? !ok_lo_toc_insn (insn)
8961 : ((insn & ((0x3f << 26) | 0x1f << 16))
8962 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8963 {
8964 char str[12];
8965
8966 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8967 sprintf (str, "%#08x", insn);
8968 info->callbacks->einfo
8969 (_("%P: %H: toc optimization is not supported for"
8970 " %s instruction.\n"),
8971 ibfd, sec, rel->r_offset & ~3, str);
8972 }
8973 }
8974
8975 switch (r_type)
8976 {
8977 case R_PPC64_TOC16:
8978 case R_PPC64_TOC16_LO:
8979 case R_PPC64_TOC16_HI:
8980 case R_PPC64_TOC16_HA:
8981 case R_PPC64_TOC16_DS:
8982 case R_PPC64_TOC16_LO_DS:
8983 /* In case we're taking addresses of toc entries. */
8984 case R_PPC64_ADDR64:
8985 break;
8986
8987 default:
8988 continue;
8989 }
8990
8991 r_symndx = ELF64_R_SYM (rel->r_info);
8992 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8993 r_symndx, ibfd))
8994 {
8995 free (used);
8996 goto error_ret;
8997 }
8998
8999 if (sym_sec != toc)
9000 continue;
9001
9002 if (h != NULL)
9003 val = h->root.u.def.value;
9004 else
9005 val = sym->st_value;
9006 val += rel->r_addend;
9007
9008 if (val >= toc->size)
9009 continue;
9010
9011 if ((skip[val >> 3] & can_optimize) != 0)
9012 {
9013 bfd_vma off;
9014 unsigned char opc;
9015
9016 switch (r_type)
9017 {
9018 case R_PPC64_TOC16_HA:
9019 break;
9020
9021 case R_PPC64_TOC16_LO_DS:
9022 off = rel->r_offset;
9023 off += (bfd_big_endian (ibfd) ? -2 : 3);
9024 if (!bfd_get_section_contents (ibfd, sec, &opc,
9025 off, 1))
9026 {
9027 free (used);
9028 goto error_ret;
9029 }
9030 if ((opc & (0x3f << 2)) == (58u << 2))
9031 break;
9032 /* Fall thru */
9033
9034 default:
9035 /* Wrong sort of reloc, or not a ld. We may
9036 as well clear ref_from_discarded too. */
9037 skip[val >> 3] = 0;
9038 }
9039 }
9040
9041 if (sec != toc)
9042 used[val >> 3] = 1;
9043 /* For the toc section, we only mark as used if this
9044 entry itself isn't unused. */
9045 else if ((used[rel->r_offset >> 3]
9046 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9047 && !used[val >> 3])
9048 {
9049 /* Do all the relocs again, to catch reference
9050 chains. */
9051 repeat = 1;
9052 used[val >> 3] = 1;
9053 }
9054 }
9055 }
9056 while (repeat);
9057
9058 if (elf_section_data (sec)->relocs != relstart)
9059 free (relstart);
9060 }
9061
9062 /* Merge the used and skip arrays. Assume that TOC
9063 doublewords not appearing as either used or unused belong
9064 to to an entry more than one doubleword in size. */
9065 for (drop = skip, keep = used, last = 0, some_unused = 0;
9066 drop < skip + (toc->size + 7) / 8;
9067 ++drop, ++keep)
9068 {
9069 if (*keep)
9070 {
9071 *drop &= ~ref_from_discarded;
9072 if ((*drop & can_optimize) != 0)
9073 some_unused = 1;
9074 last = 0;
9075 }
9076 else if ((*drop & ref_from_discarded) != 0)
9077 {
9078 some_unused = 1;
9079 last = ref_from_discarded;
9080 }
9081 else
9082 *drop = last;
9083 }
9084
9085 free (used);
9086
9087 if (some_unused)
9088 {
9089 bfd_byte *contents, *src;
9090 unsigned long off;
9091 Elf_Internal_Sym *sym;
9092 bfd_boolean local_toc_syms = FALSE;
9093
9094 /* Shuffle the toc contents, and at the same time convert the
9095 skip array from booleans into offsets. */
9096 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9097 goto error_ret;
9098
9099 elf_section_data (toc)->this_hdr.contents = contents;
9100
9101 for (src = contents, off = 0, drop = skip;
9102 src < contents + toc->size;
9103 src += 8, ++drop)
9104 {
9105 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9106 off += 8;
9107 else if (off != 0)
9108 {
9109 *drop = off;
9110 memcpy (src - off, src, 8);
9111 }
9112 }
9113 *drop = off;
9114 toc->rawsize = toc->size;
9115 toc->size = src - contents - off;
9116
9117 /* Adjust addends for relocs against the toc section sym,
9118 and optimize any accesses we can. */
9119 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9120 {
9121 if (sec->reloc_count == 0
9122 || discarded_section (sec))
9123 continue;
9124
9125 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9126 info->keep_memory);
9127 if (relstart == NULL)
9128 goto error_ret;
9129
9130 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9131 {
9132 enum elf_ppc64_reloc_type r_type;
9133 unsigned long r_symndx;
9134 asection *sym_sec;
9135 struct elf_link_hash_entry *h;
9136 bfd_vma val;
9137
9138 r_type = ELF64_R_TYPE (rel->r_info);
9139 switch (r_type)
9140 {
9141 default:
9142 continue;
9143
9144 case R_PPC64_TOC16:
9145 case R_PPC64_TOC16_LO:
9146 case R_PPC64_TOC16_HI:
9147 case R_PPC64_TOC16_HA:
9148 case R_PPC64_TOC16_DS:
9149 case R_PPC64_TOC16_LO_DS:
9150 case R_PPC64_ADDR64:
9151 break;
9152 }
9153
9154 r_symndx = ELF64_R_SYM (rel->r_info);
9155 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9156 r_symndx, ibfd))
9157 goto error_ret;
9158
9159 if (sym_sec != toc)
9160 continue;
9161
9162 if (h != NULL)
9163 val = h->root.u.def.value;
9164 else
9165 {
9166 val = sym->st_value;
9167 if (val != 0)
9168 local_toc_syms = TRUE;
9169 }
9170
9171 val += rel->r_addend;
9172
9173 if (val > toc->rawsize)
9174 val = toc->rawsize;
9175 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9176 continue;
9177 else if ((skip[val >> 3] & can_optimize) != 0)
9178 {
9179 Elf_Internal_Rela *tocrel
9180 = toc_relocs + (skip[val >> 3] >> 2);
9181 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9182
9183 switch (r_type)
9184 {
9185 case R_PPC64_TOC16_HA:
9186 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9187 break;
9188
9189 case R_PPC64_TOC16_LO_DS:
9190 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9191 break;
9192
9193 default:
9194 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9195 ppc_howto_init ();
9196 info->callbacks->einfo
9197 (_("%P: %H: %s references "
9198 "optimized away TOC entry\n"),
9199 ibfd, sec, rel->r_offset,
9200 ppc64_elf_howto_table[r_type]->name);
9201 bfd_set_error (bfd_error_bad_value);
9202 goto error_ret;
9203 }
9204 rel->r_addend = tocrel->r_addend;
9205 elf_section_data (sec)->relocs = relstart;
9206 continue;
9207 }
9208
9209 if (h != NULL || sym->st_value != 0)
9210 continue;
9211
9212 rel->r_addend -= skip[val >> 3];
9213 elf_section_data (sec)->relocs = relstart;
9214 }
9215
9216 if (elf_section_data (sec)->relocs != relstart)
9217 free (relstart);
9218 }
9219
9220 /* We shouldn't have local or global symbols defined in the TOC,
9221 but handle them anyway. */
9222 if (local_syms != NULL)
9223 for (sym = local_syms;
9224 sym < local_syms + symtab_hdr->sh_info;
9225 ++sym)
9226 if (sym->st_value != 0
9227 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9228 {
9229 unsigned long i;
9230
9231 if (sym->st_value > toc->rawsize)
9232 i = toc->rawsize >> 3;
9233 else
9234 i = sym->st_value >> 3;
9235
9236 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9237 {
9238 if (local_toc_syms)
9239 (*_bfd_error_handler)
9240 (_("%s defined on removed toc entry"),
9241 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9242 do
9243 ++i;
9244 while ((skip[i] & (ref_from_discarded | can_optimize)));
9245 sym->st_value = (bfd_vma) i << 3;
9246 }
9247
9248 sym->st_value -= skip[i];
9249 symtab_hdr->contents = (unsigned char *) local_syms;
9250 }
9251
9252 /* Adjust any global syms defined in this toc input section. */
9253 if (toc_inf.global_toc_syms)
9254 {
9255 toc_inf.toc = toc;
9256 toc_inf.skip = skip;
9257 toc_inf.global_toc_syms = FALSE;
9258 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9259 &toc_inf);
9260 }
9261
9262 if (toc->reloc_count != 0)
9263 {
9264 Elf_Internal_Shdr *rel_hdr;
9265 Elf_Internal_Rela *wrel;
9266 bfd_size_type sz;
9267
9268 /* Remove unused toc relocs, and adjust those we keep. */
9269 if (toc_relocs == NULL)
9270 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9271 info->keep_memory);
9272 if (toc_relocs == NULL)
9273 goto error_ret;
9274
9275 wrel = toc_relocs;
9276 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9277 if ((skip[rel->r_offset >> 3]
9278 & (ref_from_discarded | can_optimize)) == 0)
9279 {
9280 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9281 wrel->r_info = rel->r_info;
9282 wrel->r_addend = rel->r_addend;
9283 ++wrel;
9284 }
9285 else if (!dec_dynrel_count (rel->r_info, toc, info,
9286 &local_syms, NULL, NULL))
9287 goto error_ret;
9288
9289 elf_section_data (toc)->relocs = toc_relocs;
9290 toc->reloc_count = wrel - toc_relocs;
9291 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9292 sz = rel_hdr->sh_entsize;
9293 rel_hdr->sh_size = toc->reloc_count * sz;
9294 }
9295 }
9296 else if (toc_relocs != NULL
9297 && elf_section_data (toc)->relocs != toc_relocs)
9298 free (toc_relocs);
9299
9300 if (local_syms != NULL
9301 && symtab_hdr->contents != (unsigned char *) local_syms)
9302 {
9303 if (!info->keep_memory)
9304 free (local_syms);
9305 else
9306 symtab_hdr->contents = (unsigned char *) local_syms;
9307 }
9308 free (skip);
9309 }
9310
9311 return TRUE;
9312}
9313
9314/* Return true iff input section I references the TOC using
9315 instructions limited to +/-32k offsets. */
9316
9317bfd_boolean
9318ppc64_elf_has_small_toc_reloc (asection *i)
9319{
9320 return (is_ppc64_elf (i->owner)
9321 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9322}
9323
9324/* Allocate space for one GOT entry. */
9325
9326static void
9327allocate_got (struct elf_link_hash_entry *h,
9328 struct bfd_link_info *info,
9329 struct got_entry *gent)
9330{
9331 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9332 bfd_boolean dyn;
9333 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9334 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9335 ? 16 : 8);
9336 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9337 ? 2 : 1) * sizeof (Elf64_External_Rela);
9338 asection *got = ppc64_elf_tdata (gent->owner)->got;
9339
9340 gent->got.offset = got->size;
9341 got->size += entsize;
9342
9343 dyn = htab->elf.dynamic_sections_created;
9344 if (h->type == STT_GNU_IFUNC)
9345 {
9346 htab->elf.irelplt->size += rentsize;
9347 htab->got_reli_size += rentsize;
9348 }
9349 else if ((info->shared
9350 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9351 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9352 || h->root.type != bfd_link_hash_undefweak))
9353 {
9354 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9355 relgot->size += rentsize;
9356 }
9357}
9358
9359/* This function merges got entries in the same toc group. */
9360
9361static void
9362merge_got_entries (struct got_entry **pent)
9363{
9364 struct got_entry *ent, *ent2;
9365
9366 for (ent = *pent; ent != NULL; ent = ent->next)
9367 if (!ent->is_indirect)
9368 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9369 if (!ent2->is_indirect
9370 && ent2->addend == ent->addend
9371 && ent2->tls_type == ent->tls_type
9372 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9373 {
9374 ent2->is_indirect = TRUE;
9375 ent2->got.ent = ent;
9376 }
9377}
9378
9379/* Allocate space in .plt, .got and associated reloc sections for
9380 dynamic relocs. */
9381
9382static bfd_boolean
9383allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9384{
9385 struct bfd_link_info *info;
9386 struct ppc_link_hash_table *htab;
9387 asection *s;
9388 struct ppc_link_hash_entry *eh;
9389 struct elf_dyn_relocs *p;
9390 struct got_entry **pgent, *gent;
9391
9392 if (h->root.type == bfd_link_hash_indirect)
9393 return TRUE;
9394
9395 info = (struct bfd_link_info *) inf;
9396 htab = ppc_hash_table (info);
9397 if (htab == NULL)
9398 return FALSE;
9399
9400 if ((htab->elf.dynamic_sections_created
9401 && h->dynindx != -1
9402 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9403 || h->type == STT_GNU_IFUNC)
9404 {
9405 struct plt_entry *pent;
9406 bfd_boolean doneone = FALSE;
9407 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9408 if (pent->plt.refcount > 0)
9409 {
9410 if (!htab->elf.dynamic_sections_created
9411 || h->dynindx == -1)
9412 {
9413 s = htab->elf.iplt;
9414 pent->plt.offset = s->size;
9415 s->size += PLT_ENTRY_SIZE (htab);
9416 s = htab->elf.irelplt;
9417 }
9418 else
9419 {
9420 /* If this is the first .plt entry, make room for the special
9421 first entry. */
9422 s = htab->elf.splt;
9423 if (s->size == 0)
9424 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9425
9426 pent->plt.offset = s->size;
9427
9428 /* Make room for this entry. */
9429 s->size += PLT_ENTRY_SIZE (htab);
9430
9431 /* Make room for the .glink code. */
9432 s = htab->glink;
9433 if (s->size == 0)
9434 s->size += GLINK_CALL_STUB_SIZE;
9435 if (htab->opd_abi)
9436 {
9437 /* We need bigger stubs past index 32767. */
9438 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9439 s->size += 4;
9440 s->size += 2*4;
9441 }
9442 else
9443 s->size += 4;
9444
9445 /* We also need to make an entry in the .rela.plt section. */
9446 s = htab->elf.srelplt;
9447 }
9448 s->size += sizeof (Elf64_External_Rela);
9449 doneone = TRUE;
9450 }
9451 else
9452 pent->plt.offset = (bfd_vma) -1;
9453 if (!doneone)
9454 {
9455 h->plt.plist = NULL;
9456 h->needs_plt = 0;
9457 }
9458 }
9459 else
9460 {
9461 h->plt.plist = NULL;
9462 h->needs_plt = 0;
9463 }
9464
9465 eh = (struct ppc_link_hash_entry *) h;
9466 /* Run through the TLS GD got entries first if we're changing them
9467 to TPREL. */
9468 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9469 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9470 if (gent->got.refcount > 0
9471 && (gent->tls_type & TLS_GD) != 0)
9472 {
9473 /* This was a GD entry that has been converted to TPREL. If
9474 there happens to be a TPREL entry we can use that one. */
9475 struct got_entry *ent;
9476 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9477 if (ent->got.refcount > 0
9478 && (ent->tls_type & TLS_TPREL) != 0
9479 && ent->addend == gent->addend
9480 && ent->owner == gent->owner)
9481 {
9482 gent->got.refcount = 0;
9483 break;
9484 }
9485
9486 /* If not, then we'll be using our own TPREL entry. */
9487 if (gent->got.refcount != 0)
9488 gent->tls_type = TLS_TLS | TLS_TPREL;
9489 }
9490
9491 /* Remove any list entry that won't generate a word in the GOT before
9492 we call merge_got_entries. Otherwise we risk merging to empty
9493 entries. */
9494 pgent = &h->got.glist;
9495 while ((gent = *pgent) != NULL)
9496 if (gent->got.refcount > 0)
9497 {
9498 if ((gent->tls_type & TLS_LD) != 0
9499 && !h->def_dynamic)
9500 {
9501 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9502 *pgent = gent->next;
9503 }
9504 else
9505 pgent = &gent->next;
9506 }
9507 else
9508 *pgent = gent->next;
9509
9510 if (!htab->do_multi_toc)
9511 merge_got_entries (&h->got.glist);
9512
9513 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9514 if (!gent->is_indirect)
9515 {
9516 /* Make sure this symbol is output as a dynamic symbol.
9517 Undefined weak syms won't yet be marked as dynamic,
9518 nor will all TLS symbols. */
9519 if (h->dynindx == -1
9520 && !h->forced_local
9521 && h->type != STT_GNU_IFUNC
9522 && htab->elf.dynamic_sections_created)
9523 {
9524 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9525 return FALSE;
9526 }
9527
9528 if (!is_ppc64_elf (gent->owner))
9529 abort ();
9530
9531 allocate_got (h, info, gent);
9532 }
9533
9534 if (eh->dyn_relocs == NULL
9535 || (!htab->elf.dynamic_sections_created
9536 && h->type != STT_GNU_IFUNC))
9537 return TRUE;
9538
9539 /* In the shared -Bsymbolic case, discard space allocated for
9540 dynamic pc-relative relocs against symbols which turn out to be
9541 defined in regular objects. For the normal shared case, discard
9542 space for relocs that have become local due to symbol visibility
9543 changes. */
9544
9545 if (info->shared)
9546 {
9547 /* Relocs that use pc_count are those that appear on a call insn,
9548 or certain REL relocs (see must_be_dyn_reloc) that can be
9549 generated via assembly. We want calls to protected symbols to
9550 resolve directly to the function rather than going via the plt.
9551 If people want function pointer comparisons to work as expected
9552 then they should avoid writing weird assembly. */
9553 if (SYMBOL_CALLS_LOCAL (info, h))
9554 {
9555 struct elf_dyn_relocs **pp;
9556
9557 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9558 {
9559 p->count -= p->pc_count;
9560 p->pc_count = 0;
9561 if (p->count == 0)
9562 *pp = p->next;
9563 else
9564 pp = &p->next;
9565 }
9566 }
9567
9568 /* Also discard relocs on undefined weak syms with non-default
9569 visibility. */
9570 if (eh->dyn_relocs != NULL
9571 && h->root.type == bfd_link_hash_undefweak)
9572 {
9573 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9574 eh->dyn_relocs = NULL;
9575
9576 /* Make sure this symbol is output as a dynamic symbol.
9577 Undefined weak syms won't yet be marked as dynamic. */
9578 else if (h->dynindx == -1
9579 && !h->forced_local)
9580 {
9581 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9582 return FALSE;
9583 }
9584 }
9585 }
9586 else if (h->type == STT_GNU_IFUNC)
9587 {
9588 if (!h->non_got_ref)
9589 eh->dyn_relocs = NULL;
9590 }
9591 else if (ELIMINATE_COPY_RELOCS)
9592 {
9593 /* For the non-shared case, discard space for relocs against
9594 symbols which turn out to need copy relocs or are not
9595 dynamic. */
9596
9597 if (!h->non_got_ref
9598 && !h->def_regular)
9599 {
9600 /* Make sure this symbol is output as a dynamic symbol.
9601 Undefined weak syms won't yet be marked as dynamic. */
9602 if (h->dynindx == -1
9603 && !h->forced_local)
9604 {
9605 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9606 return FALSE;
9607 }
9608
9609 /* If that succeeded, we know we'll be keeping all the
9610 relocs. */
9611 if (h->dynindx != -1)
9612 goto keep;
9613 }
9614
9615 eh->dyn_relocs = NULL;
9616
9617 keep: ;
9618 }
9619
9620 /* Finally, allocate space. */
9621 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9622 {
9623 asection *sreloc = elf_section_data (p->sec)->sreloc;
9624 if (eh->elf.type == STT_GNU_IFUNC)
9625 sreloc = htab->elf.irelplt;
9626 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9627 }
9628
9629 return TRUE;
9630}
9631
9632/* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9633 to set up space for global entry stubs. These are put in glink,
9634 after the branch table. */
9635
9636static bfd_boolean
9637size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9638{
9639 struct bfd_link_info *info;
9640 struct ppc_link_hash_table *htab;
9641 struct plt_entry *pent;
9642 asection *s;
9643
9644 if (h->root.type == bfd_link_hash_indirect)
9645 return TRUE;
9646
9647 if (!h->pointer_equality_needed)
9648 return TRUE;
9649
9650 if (h->def_regular)
9651 return TRUE;
9652
9653 info = inf;
9654 htab = ppc_hash_table (info);
9655 if (htab == NULL)
9656 return FALSE;
9657
9658 s = htab->glink;
9659 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9660 if (pent->plt.offset != (bfd_vma) -1
9661 && pent->addend == 0)
9662 {
9663 /* For ELFv2, if this symbol is not defined in a regular file
9664 and we are not generating a shared library or pie, then we
9665 need to define the symbol in the executable on a call stub.
9666 This is to avoid text relocations. */
9667 s->size = (s->size + 15) & -16;
9668 h->root.u.def.section = s;
9669 h->root.u.def.value = s->size;
9670 s->size += 16;
9671 break;
9672 }
9673 return TRUE;
9674}
9675
9676/* Set DF_TEXTREL if we find any dynamic relocs that apply to
9677 read-only sections. */
9678
9679static bfd_boolean
9680maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9681{
9682 if (h->root.type == bfd_link_hash_indirect)
9683 return TRUE;
9684
9685 if (readonly_dynrelocs (h))
9686 {
9687 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9688
9689 /* Not an error, just cut short the traversal. */
9690 return FALSE;
9691 }
9692 return TRUE;
9693}
9694
9695/* Set the sizes of the dynamic sections. */
9696
9697static bfd_boolean
9698ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9699 struct bfd_link_info *info)
9700{
9701 struct ppc_link_hash_table *htab;
9702 bfd *dynobj;
9703 asection *s;
9704 bfd_boolean relocs;
9705 bfd *ibfd;
9706 struct got_entry *first_tlsld;
9707
9708 htab = ppc_hash_table (info);
9709 if (htab == NULL)
9710 return FALSE;
9711
9712 dynobj = htab->elf.dynobj;
9713 if (dynobj == NULL)
9714 abort ();
9715
9716 if (htab->elf.dynamic_sections_created)
9717 {
9718 /* Set the contents of the .interp section to the interpreter. */
9719 if (info->executable)
9720 {
9721 s = bfd_get_linker_section (dynobj, ".interp");
9722 if (s == NULL)
9723 abort ();
9724 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9725 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9726 }
9727 }
9728
9729 /* Set up .got offsets for local syms, and space for local dynamic
9730 relocs. */
9731 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9732 {
9733 struct got_entry **lgot_ents;
9734 struct got_entry **end_lgot_ents;
9735 struct plt_entry **local_plt;
9736 struct plt_entry **end_local_plt;
9737 unsigned char *lgot_masks;
9738 bfd_size_type locsymcount;
9739 Elf_Internal_Shdr *symtab_hdr;
9740
9741 if (!is_ppc64_elf (ibfd))
9742 continue;
9743
9744 for (s = ibfd->sections; s != NULL; s = s->next)
9745 {
9746 struct ppc_dyn_relocs *p;
9747
9748 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9749 {
9750 if (!bfd_is_abs_section (p->sec)
9751 && bfd_is_abs_section (p->sec->output_section))
9752 {
9753 /* Input section has been discarded, either because
9754 it is a copy of a linkonce section or due to
9755 linker script /DISCARD/, so we'll be discarding
9756 the relocs too. */
9757 }
9758 else if (p->count != 0)
9759 {
9760 asection *srel = elf_section_data (p->sec)->sreloc;
9761 if (p->ifunc)
9762 srel = htab->elf.irelplt;
9763 srel->size += p->count * sizeof (Elf64_External_Rela);
9764 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9765 info->flags |= DF_TEXTREL;
9766 }
9767 }
9768 }
9769
9770 lgot_ents = elf_local_got_ents (ibfd);
9771 if (!lgot_ents)
9772 continue;
9773
9774 symtab_hdr = &elf_symtab_hdr (ibfd);
9775 locsymcount = symtab_hdr->sh_info;
9776 end_lgot_ents = lgot_ents + locsymcount;
9777 local_plt = (struct plt_entry **) end_lgot_ents;
9778 end_local_plt = local_plt + locsymcount;
9779 lgot_masks = (unsigned char *) end_local_plt;
9780 s = ppc64_elf_tdata (ibfd)->got;
9781 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9782 {
9783 struct got_entry **pent, *ent;
9784
9785 pent = lgot_ents;
9786 while ((ent = *pent) != NULL)
9787 if (ent->got.refcount > 0)
9788 {
9789 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9790 {
9791 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9792 *pent = ent->next;
9793 }
9794 else
9795 {
9796 unsigned int ent_size = 8;
9797 unsigned int rel_size = sizeof (Elf64_External_Rela);
9798
9799 ent->got.offset = s->size;
9800 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9801 {
9802 ent_size *= 2;
9803 rel_size *= 2;
9804 }
9805 s->size += ent_size;
9806 if ((*lgot_masks & PLT_IFUNC) != 0)
9807 {
9808 htab->elf.irelplt->size += rel_size;
9809 htab->got_reli_size += rel_size;
9810 }
9811 else if (info->shared)
9812 {
9813 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9814 srel->size += rel_size;
9815 }
9816 pent = &ent->next;
9817 }
9818 }
9819 else
9820 *pent = ent->next;
9821 }
9822
9823 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9824 for (; local_plt < end_local_plt; ++local_plt)
9825 {
9826 struct plt_entry *ent;
9827
9828 for (ent = *local_plt; ent != NULL; ent = ent->next)
9829 if (ent->plt.refcount > 0)
9830 {
9831 s = htab->elf.iplt;
9832 ent->plt.offset = s->size;
9833 s->size += PLT_ENTRY_SIZE (htab);
9834
9835 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9836 }
9837 else
9838 ent->plt.offset = (bfd_vma) -1;
9839 }
9840 }
9841
9842 /* Allocate global sym .plt and .got entries, and space for global
9843 sym dynamic relocs. */
9844 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9845 /* Stash the end of glink branch table. */
9846 if (htab->glink != NULL)
9847 htab->glink->rawsize = htab->glink->size;
9848
9849 if (!htab->opd_abi && !info->shared)
9850 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9851
9852 first_tlsld = NULL;
9853 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9854 {
9855 struct got_entry *ent;
9856
9857 if (!is_ppc64_elf (ibfd))
9858 continue;
9859
9860 ent = ppc64_tlsld_got (ibfd);
9861 if (ent->got.refcount > 0)
9862 {
9863 if (!htab->do_multi_toc && first_tlsld != NULL)
9864 {
9865 ent->is_indirect = TRUE;
9866 ent->got.ent = first_tlsld;
9867 }
9868 else
9869 {
9870 if (first_tlsld == NULL)
9871 first_tlsld = ent;
9872 s = ppc64_elf_tdata (ibfd)->got;
9873 ent->got.offset = s->size;
9874 ent->owner = ibfd;
9875 s->size += 16;
9876 if (info->shared)
9877 {
9878 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9879 srel->size += sizeof (Elf64_External_Rela);
9880 }
9881 }
9882 }
9883 else
9884 ent->got.offset = (bfd_vma) -1;
9885 }
9886
9887 /* We now have determined the sizes of the various dynamic sections.
9888 Allocate memory for them. */
9889 relocs = FALSE;
9890 for (s = dynobj->sections; s != NULL; s = s->next)
9891 {
9892 if ((s->flags & SEC_LINKER_CREATED) == 0)
9893 continue;
9894
9895 if (s == htab->brlt || s == htab->relbrlt)
9896 /* These haven't been allocated yet; don't strip. */
9897 continue;
9898 else if (s == htab->elf.sgot
9899 || s == htab->elf.splt
9900 || s == htab->elf.iplt
9901 || s == htab->glink
9902 || s == htab->dynbss)
9903 {
9904 /* Strip this section if we don't need it; see the
9905 comment below. */
9906 }
9907 else if (s == htab->glink_eh_frame)
9908 {
9909 if (!bfd_is_abs_section (s->output_section))
9910 /* Not sized yet. */
9911 continue;
9912 }
9913 else if (CONST_STRNEQ (s->name, ".rela"))
9914 {
9915 if (s->size != 0)
9916 {
9917 if (s != htab->elf.srelplt)
9918 relocs = TRUE;
9919
9920 /* We use the reloc_count field as a counter if we need
9921 to copy relocs into the output file. */
9922 s->reloc_count = 0;
9923 }
9924 }
9925 else
9926 {
9927 /* It's not one of our sections, so don't allocate space. */
9928 continue;
9929 }
9930
9931 if (s->size == 0)
9932 {
9933 /* If we don't need this section, strip it from the
9934 output file. This is mostly to handle .rela.bss and
9935 .rela.plt. We must create both sections in
9936 create_dynamic_sections, because they must be created
9937 before the linker maps input sections to output
9938 sections. The linker does that before
9939 adjust_dynamic_symbol is called, and it is that
9940 function which decides whether anything needs to go
9941 into these sections. */
9942 s->flags |= SEC_EXCLUDE;
9943 continue;
9944 }
9945
9946 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9947 continue;
9948
9949 /* Allocate memory for the section contents. We use bfd_zalloc
9950 here in case unused entries are not reclaimed before the
9951 section's contents are written out. This should not happen,
9952 but this way if it does we get a R_PPC64_NONE reloc in .rela
9953 sections instead of garbage.
9954 We also rely on the section contents being zero when writing
9955 the GOT. */
9956 s->contents = bfd_zalloc (dynobj, s->size);
9957 if (s->contents == NULL)
9958 return FALSE;
9959 }
9960
9961 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9962 {
9963 if (!is_ppc64_elf (ibfd))
9964 continue;
9965
9966 s = ppc64_elf_tdata (ibfd)->got;
9967 if (s != NULL && s != htab->elf.sgot)
9968 {
9969 if (s->size == 0)
9970 s->flags |= SEC_EXCLUDE;
9971 else
9972 {
9973 s->contents = bfd_zalloc (ibfd, s->size);
9974 if (s->contents == NULL)
9975 return FALSE;
9976 }
9977 }
9978 s = ppc64_elf_tdata (ibfd)->relgot;
9979 if (s != NULL)
9980 {
9981 if (s->size == 0)
9982 s->flags |= SEC_EXCLUDE;
9983 else
9984 {
9985 s->contents = bfd_zalloc (ibfd, s->size);
9986 if (s->contents == NULL)
9987 return FALSE;
9988 relocs = TRUE;
9989 s->reloc_count = 0;
9990 }
9991 }
9992 }
9993
9994 if (htab->elf.dynamic_sections_created)
9995 {
9996 bfd_boolean tls_opt;
9997
9998 /* Add some entries to the .dynamic section. We fill in the
9999 values later, in ppc64_elf_finish_dynamic_sections, but we
10000 must add the entries now so that we get the correct size for
10001 the .dynamic section. The DT_DEBUG entry is filled in by the
10002 dynamic linker and used by the debugger. */
10003#define add_dynamic_entry(TAG, VAL) \
10004 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10005
10006 if (info->executable)
10007 {
10008 if (!add_dynamic_entry (DT_DEBUG, 0))
10009 return FALSE;
10010 }
10011
10012 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10013 {
10014 if (!add_dynamic_entry (DT_PLTGOT, 0)
10015 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10016 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10017 || !add_dynamic_entry (DT_JMPREL, 0)
10018 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10019 return FALSE;
10020 }
10021
10022 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10023 {
10024 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10025 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10026 return FALSE;
10027 }
10028
10029 tls_opt = (!htab->params->no_tls_get_addr_opt
10030 && htab->tls_get_addr_fd != NULL
10031 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10032 if (tls_opt || !htab->opd_abi)
10033 {
10034 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10035 return FALSE;
10036 }
10037
10038 if (relocs)
10039 {
10040 if (!add_dynamic_entry (DT_RELA, 0)
10041 || !add_dynamic_entry (DT_RELASZ, 0)
10042 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10043 return FALSE;
10044
10045 /* If any dynamic relocs apply to a read-only section,
10046 then we need a DT_TEXTREL entry. */
10047 if ((info->flags & DF_TEXTREL) == 0)
10048 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10049
10050 if ((info->flags & DF_TEXTREL) != 0)
10051 {
10052 if (!add_dynamic_entry (DT_TEXTREL, 0))
10053 return FALSE;
10054 }
10055 }
10056 }
10057#undef add_dynamic_entry
10058
10059 return TRUE;
10060}
10061
10062/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10063
10064static bfd_boolean
10065ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10066{
10067 if (h->plt.plist != NULL
10068 && !h->def_regular
10069 && !h->pointer_equality_needed)
10070 return FALSE;
10071
10072 return _bfd_elf_hash_symbol (h);
10073}
10074
10075/* Determine the type of stub needed, if any, for a call. */
10076
10077static inline enum ppc_stub_type
10078ppc_type_of_stub (asection *input_sec,
10079 const Elf_Internal_Rela *rel,
10080 struct ppc_link_hash_entry **hash,
10081 struct plt_entry **plt_ent,
10082 bfd_vma destination,
10083 unsigned long local_off)
10084{
10085 struct ppc_link_hash_entry *h = *hash;
10086 bfd_vma location;
10087 bfd_vma branch_offset;
10088 bfd_vma max_branch_offset;
10089 enum elf_ppc64_reloc_type r_type;
10090
10091 if (h != NULL)
10092 {
10093 struct plt_entry *ent;
10094 struct ppc_link_hash_entry *fdh = h;
10095 if (h->oh != NULL
10096 && h->oh->is_func_descriptor)
10097 {
10098 fdh = ppc_follow_link (h->oh);
10099 *hash = fdh;
10100 }
10101
10102 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10103 if (ent->addend == rel->r_addend
10104 && ent->plt.offset != (bfd_vma) -1)
10105 {
10106 *plt_ent = ent;
10107 return ppc_stub_plt_call;
10108 }
10109
10110 /* Here, we know we don't have a plt entry. If we don't have a
10111 either a defined function descriptor or a defined entry symbol
10112 in a regular object file, then it is pointless trying to make
10113 any other type of stub. */
10114 if (!is_static_defined (&fdh->elf)
10115 && !is_static_defined (&h->elf))
10116 return ppc_stub_none;
10117 }
10118 else if (elf_local_got_ents (input_sec->owner) != NULL)
10119 {
10120 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10121 struct plt_entry **local_plt = (struct plt_entry **)
10122 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10123 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10124
10125 if (local_plt[r_symndx] != NULL)
10126 {
10127 struct plt_entry *ent;
10128
10129 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10130 if (ent->addend == rel->r_addend
10131 && ent->plt.offset != (bfd_vma) -1)
10132 {
10133 *plt_ent = ent;
10134 return ppc_stub_plt_call;
10135 }
10136 }
10137 }
10138
10139 /* Determine where the call point is. */
10140 location = (input_sec->output_offset
10141 + input_sec->output_section->vma
10142 + rel->r_offset);
10143
10144 branch_offset = destination - location;
10145 r_type = ELF64_R_TYPE (rel->r_info);
10146
10147 /* Determine if a long branch stub is needed. */
10148 max_branch_offset = 1 << 25;
10149 if (r_type != R_PPC64_REL24)
10150 max_branch_offset = 1 << 15;
10151
10152 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10153 /* We need a stub. Figure out whether a long_branch or plt_branch
10154 is needed later. */
10155 return ppc_stub_long_branch;
10156
10157 return ppc_stub_none;
10158}
10159
10160/* With power7 weakly ordered memory model, it is possible for ld.so
10161 to update a plt entry in one thread and have another thread see a
10162 stale zero toc entry. To avoid this we need some sort of acquire
10163 barrier in the call stub. One solution is to make the load of the
10164 toc word seem to appear to depend on the load of the function entry
10165 word. Another solution is to test for r2 being zero, and branch to
10166 the appropriate glink entry if so.
10167
10168 . fake dep barrier compare
10169 . ld 12,xxx(2) ld 12,xxx(2)
10170 . mtctr 12 mtctr 12
10171 . xor 11,12,12 ld 2,xxx+8(2)
10172 . add 2,2,11 cmpldi 2,0
10173 . ld 2,xxx+8(2) bnectr+
10174 . bctr b <glink_entry>
10175
10176 The solution involving the compare turns out to be faster, so
10177 that's what we use unless the branch won't reach. */
10178
10179#define ALWAYS_USE_FAKE_DEP 0
10180#define ALWAYS_EMIT_R2SAVE 0
10181
10182#define PPC_LO(v) ((v) & 0xffff)
10183#define PPC_HI(v) (((v) >> 16) & 0xffff)
10184#define PPC_HA(v) PPC_HI ((v) + 0x8000)
10185
10186static inline unsigned int
10187plt_stub_size (struct ppc_link_hash_table *htab,
10188 struct ppc_stub_hash_entry *stub_entry,
10189 bfd_vma off)
10190{
10191 unsigned size = 12;
10192
10193 if (ALWAYS_EMIT_R2SAVE
10194 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10195 size += 4;
10196 if (PPC_HA (off) != 0)
10197 size += 4;
10198 if (htab->opd_abi)
10199 {
10200 size += 4;
10201 if (htab->params->plt_static_chain)
10202 size += 4;
10203 if (htab->params->plt_thread_safe)
10204 size += 8;
10205 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10206 size += 4;
10207 }
10208 if (stub_entry->h != NULL
10209 && (stub_entry->h == htab->tls_get_addr_fd
10210 || stub_entry->h == htab->tls_get_addr)
10211 && !htab->params->no_tls_get_addr_opt)
10212 size += 13 * 4;
10213 return size;
10214}
10215
10216/* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10217 then return the padding needed to do so. */
10218static inline unsigned int
10219plt_stub_pad (struct ppc_link_hash_table *htab,
10220 struct ppc_stub_hash_entry *stub_entry,
10221 bfd_vma plt_off)
10222{
10223 int stub_align = 1 << htab->params->plt_stub_align;
10224 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10225 bfd_vma stub_off = stub_entry->stub_sec->size;
10226
10227 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10228 > ((stub_size - 1) & -stub_align))
10229 return stub_align - (stub_off & (stub_align - 1));
10230 return 0;
10231}
10232
10233/* Build a .plt call stub. */
10234
10235static inline bfd_byte *
10236build_plt_stub (struct ppc_link_hash_table *htab,
10237 struct ppc_stub_hash_entry *stub_entry,
10238 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10239{
10240 bfd *obfd = htab->params->stub_bfd;
10241 bfd_boolean plt_load_toc = htab->opd_abi;
10242 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10243 bfd_boolean plt_thread_safe = htab->params->plt_thread_safe;
10244 bfd_boolean use_fake_dep = plt_thread_safe;
10245 bfd_vma cmp_branch_off = 0;
10246
10247 if (!ALWAYS_USE_FAKE_DEP
10248 && plt_load_toc
10249 && plt_thread_safe
10250 && !(stub_entry->h != NULL
10251 && (stub_entry->h == htab->tls_get_addr_fd
10252 || stub_entry->h == htab->tls_get_addr)
10253 && !htab->params->no_tls_get_addr_opt))
10254 {
10255 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10256 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10257 / PLT_ENTRY_SIZE (htab));
10258 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10259 bfd_vma to, from;
10260
10261 if (pltindex > 32768)
10262 glinkoff += (pltindex - 32768) * 4;
10263 to = (glinkoff
10264 + htab->glink->output_offset
10265 + htab->glink->output_section->vma);
10266 from = (p - stub_entry->stub_sec->contents
10267 + 4 * (ALWAYS_EMIT_R2SAVE
10268 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10269 + 4 * (PPC_HA (offset) != 0)
10270 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10271 != PPC_HA (offset))
10272 + 4 * (plt_static_chain != 0)
10273 + 20
10274 + stub_entry->stub_sec->output_offset
10275 + stub_entry->stub_sec->output_section->vma);
10276 cmp_branch_off = to - from;
10277 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10278 }
10279
10280 if (PPC_HA (offset) != 0)
10281 {
10282 if (r != NULL)
10283 {
10284 if (ALWAYS_EMIT_R2SAVE
10285 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10286 r[0].r_offset += 4;
10287 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10288 r[1].r_offset = r[0].r_offset + 4;
10289 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10290 r[1].r_addend = r[0].r_addend;
10291 if (plt_load_toc)
10292 {
10293 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10294 {
10295 r[2].r_offset = r[1].r_offset + 4;
10296 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10297 r[2].r_addend = r[0].r_addend;
10298 }
10299 else
10300 {
10301 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10302 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10303 r[2].r_addend = r[0].r_addend + 8;
10304 if (plt_static_chain)
10305 {
10306 r[3].r_offset = r[2].r_offset + 4;
10307 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10308 r[3].r_addend = r[0].r_addend + 16;
10309 }
10310 }
10311 }
10312 }
10313 if (ALWAYS_EMIT_R2SAVE
10314 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10315 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10316 if (plt_load_toc)
10317 {
10318 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10319 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10320 }
10321 else
10322 {
10323 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10324 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10325 }
10326 if (plt_load_toc
10327 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10328 {
10329 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10330 offset = 0;
10331 }
10332 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10333 if (plt_load_toc)
10334 {
10335 if (use_fake_dep)
10336 {
10337 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10338 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10339 }
10340 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10341 if (plt_static_chain)
10342 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10343 }
10344 }
10345 else
10346 {
10347 if (r != NULL)
10348 {
10349 if (ALWAYS_EMIT_R2SAVE
10350 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10351 r[0].r_offset += 4;
10352 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10353 if (plt_load_toc)
10354 {
10355 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10356 {
10357 r[1].r_offset = r[0].r_offset + 4;
10358 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10359 r[1].r_addend = r[0].r_addend;
10360 }
10361 else
10362 {
10363 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10364 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10365 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10366 if (plt_static_chain)
10367 {
10368 r[2].r_offset = r[1].r_offset + 4;
10369 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10370 r[2].r_addend = r[0].r_addend + 8;
10371 }
10372 }
10373 }
10374 }
10375 if (ALWAYS_EMIT_R2SAVE
10376 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10377 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10378 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10379 if (plt_load_toc
10380 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10381 {
10382 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10383 offset = 0;
10384 }
10385 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10386 if (plt_load_toc)
10387 {
10388 if (use_fake_dep)
10389 {
10390 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10391 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10392 }
10393 if (plt_static_chain)
10394 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10395 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10396 }
10397 }
10398 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10399 {
10400 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10401 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10402 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10403 }
10404 else
10405 bfd_put_32 (obfd, BCTR, p), p += 4;
10406 return p;
10407}
10408
10409/* Build a special .plt call stub for __tls_get_addr. */
10410
10411#define LD_R11_0R3 0xe9630000
10412#define LD_R12_0R3 0xe9830000
10413#define MR_R0_R3 0x7c601b78
10414#define CMPDI_R11_0 0x2c2b0000
10415#define ADD_R3_R12_R13 0x7c6c6a14
10416#define BEQLR 0x4d820020
10417#define MR_R3_R0 0x7c030378
10418#define STD_R11_0R1 0xf9610000
10419#define BCTRL 0x4e800421
10420#define LD_R11_0R1 0xe9610000
10421#define MTLR_R11 0x7d6803a6
10422
10423static inline bfd_byte *
10424build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10425 struct ppc_stub_hash_entry *stub_entry,
10426 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10427{
10428 bfd *obfd = htab->params->stub_bfd;
10429
10430 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10431 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10432 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10433 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10434 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10435 bfd_put_32 (obfd, BEQLR, p), p += 4;
10436 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10437 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10438 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10439
10440 if (r != NULL)
10441 r[0].r_offset += 9 * 4;
10442 p = build_plt_stub (htab, stub_entry, p, offset, r);
10443 bfd_put_32 (obfd, BCTRL, p - 4);
10444
10445 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10446 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10447 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10448 bfd_put_32 (obfd, BLR, p), p += 4;
10449
10450 return p;
10451}
10452
10453static Elf_Internal_Rela *
10454get_relocs (asection *sec, int count)
10455{
10456 Elf_Internal_Rela *relocs;
10457 struct bfd_elf_section_data *elfsec_data;
10458
10459 elfsec_data = elf_section_data (sec);
10460 relocs = elfsec_data->relocs;
10461 if (relocs == NULL)
10462 {
10463 bfd_size_type relsize;
10464 relsize = sec->reloc_count * sizeof (*relocs);
10465 relocs = bfd_alloc (sec->owner, relsize);
10466 if (relocs == NULL)
10467 return NULL;
10468 elfsec_data->relocs = relocs;
10469 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10470 sizeof (Elf_Internal_Shdr));
10471 if (elfsec_data->rela.hdr == NULL)
10472 return NULL;
10473 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10474 * sizeof (Elf64_External_Rela));
10475 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10476 sec->reloc_count = 0;
10477 }
10478 relocs += sec->reloc_count;
10479 sec->reloc_count += count;
10480 return relocs;
10481}
10482
10483static bfd_vma
10484get_r2off (struct bfd_link_info *info,
10485 struct ppc_stub_hash_entry *stub_entry)
10486{
10487 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10488 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10489
10490 if (r2off == 0)
10491 {
10492 /* Support linking -R objects. Get the toc pointer from the
10493 opd entry. */
10494 char buf[8];
10495 if (!htab->opd_abi)
10496 return r2off;
10497 asection *opd = stub_entry->h->elf.root.u.def.section;
10498 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10499
10500 if (strcmp (opd->name, ".opd") != 0
10501 || opd->reloc_count != 0)
10502 {
10503 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10504 stub_entry->h->elf.root.root.string);
10505 bfd_set_error (bfd_error_bad_value);
10506 return 0;
10507 }
10508 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10509 return 0;
10510 r2off = bfd_get_64 (opd->owner, buf);
10511 r2off -= elf_gp (info->output_bfd);
10512 }
10513 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10514 return r2off;
10515}
10516
10517static bfd_boolean
10518ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10519{
10520 struct ppc_stub_hash_entry *stub_entry;
10521 struct ppc_branch_hash_entry *br_entry;
10522 struct bfd_link_info *info;
10523 struct ppc_link_hash_table *htab;
10524 bfd_byte *loc;
10525 bfd_byte *p;
10526 bfd_vma dest, off;
10527 int size;
10528 Elf_Internal_Rela *r;
10529 asection *plt;
10530
10531 /* Massage our args to the form they really have. */
10532 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10533 info = in_arg;
10534
10535 htab = ppc_hash_table (info);
10536 if (htab == NULL)
10537 return FALSE;
10538
10539 /* Make a note of the offset within the stubs for this entry. */
10540 stub_entry->stub_offset = stub_entry->stub_sec->size;
10541 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10542
10543 htab->stub_count[stub_entry->stub_type - 1] += 1;
10544 switch (stub_entry->stub_type)
10545 {
10546 case ppc_stub_long_branch:
10547 case ppc_stub_long_branch_r2off:
10548 /* Branches are relative. This is where we are going to. */
10549 dest = (stub_entry->target_value
10550 + stub_entry->target_section->output_offset
10551 + stub_entry->target_section->output_section->vma);
10552 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10553 off = dest;
10554
10555 /* And this is where we are coming from. */
10556 off -= (stub_entry->stub_offset
10557 + stub_entry->stub_sec->output_offset
10558 + stub_entry->stub_sec->output_section->vma);
10559
10560 size = 4;
10561 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10562 {
10563 bfd_vma r2off = get_r2off (info, stub_entry);
10564
10565 if (r2off == 0)
10566 {
10567 htab->stub_error = TRUE;
10568 return FALSE;
10569 }
10570 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10571 loc += 4;
10572 size = 12;
10573 if (PPC_HA (r2off) != 0)
10574 {
10575 size = 16;
10576 bfd_put_32 (htab->params->stub_bfd,
10577 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10578 loc += 4;
10579 }
10580 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10581 loc += 4;
10582 off -= size - 4;
10583 }
10584 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10585
10586 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10587 {
10588 info->callbacks->einfo
10589 (_("%P: long branch stub `%s' offset overflow\n"),
10590 stub_entry->root.string);
10591 htab->stub_error = TRUE;
10592 return FALSE;
10593 }
10594
10595 if (info->emitrelocations)
10596 {
10597 r = get_relocs (stub_entry->stub_sec, 1);
10598 if (r == NULL)
10599 return FALSE;
10600 r->r_offset = loc - stub_entry->stub_sec->contents;
10601 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10602 r->r_addend = dest;
10603 if (stub_entry->h != NULL)
10604 {
10605 struct elf_link_hash_entry **hashes;
10606 unsigned long symndx;
10607 struct ppc_link_hash_entry *h;
10608
10609 hashes = elf_sym_hashes (htab->params->stub_bfd);
10610 if (hashes == NULL)
10611 {
10612 bfd_size_type hsize;
10613
10614 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10615 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10616 if (hashes == NULL)
10617 return FALSE;
10618 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10619 htab->stub_globals = 1;
10620 }
10621 symndx = htab->stub_globals++;
10622 h = stub_entry->h;
10623 hashes[symndx] = &h->elf;
10624 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10625 if (h->oh != NULL && h->oh->is_func)
10626 h = ppc_follow_link (h->oh);
10627 if (h->elf.root.u.def.section != stub_entry->target_section)
10628 /* H is an opd symbol. The addend must be zero. */
10629 r->r_addend = 0;
10630 else
10631 {
10632 off = (h->elf.root.u.def.value
10633 + h->elf.root.u.def.section->output_offset
10634 + h->elf.root.u.def.section->output_section->vma);
10635 r->r_addend -= off;
10636 }
10637 }
10638 }
10639 break;
10640
10641 case ppc_stub_plt_branch:
10642 case ppc_stub_plt_branch_r2off:
10643 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10644 stub_entry->root.string + 9,
10645 FALSE, FALSE);
10646 if (br_entry == NULL)
10647 {
10648 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10649 stub_entry->root.string);
10650 htab->stub_error = TRUE;
10651 return FALSE;
10652 }
10653
10654 dest = (stub_entry->target_value
10655 + stub_entry->target_section->output_offset
10656 + stub_entry->target_section->output_section->vma);
10657 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10658 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10659
10660 bfd_put_64 (htab->brlt->owner, dest,
10661 htab->brlt->contents + br_entry->offset);
10662
10663 if (br_entry->iter == htab->stub_iteration)
10664 {
10665 br_entry->iter = 0;
10666
10667 if (htab->relbrlt != NULL)
10668 {
10669 /* Create a reloc for the branch lookup table entry. */
10670 Elf_Internal_Rela rela;
10671 bfd_byte *rl;
10672
10673 rela.r_offset = (br_entry->offset
10674 + htab->brlt->output_offset
10675 + htab->brlt->output_section->vma);
10676 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10677 rela.r_addend = dest;
10678
10679 rl = htab->relbrlt->contents;
10680 rl += (htab->relbrlt->reloc_count++
10681 * sizeof (Elf64_External_Rela));
10682 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10683 }
10684 else if (info->emitrelocations)
10685 {
10686 r = get_relocs (htab->brlt, 1);
10687 if (r == NULL)
10688 return FALSE;
10689 /* brlt, being SEC_LINKER_CREATED does not go through the
10690 normal reloc processing. Symbols and offsets are not
10691 translated from input file to output file form, so
10692 set up the offset per the output file. */
10693 r->r_offset = (br_entry->offset
10694 + htab->brlt->output_offset
10695 + htab->brlt->output_section->vma);
10696 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10697 r->r_addend = dest;
10698 }
10699 }
10700
10701 dest = (br_entry->offset
10702 + htab->brlt->output_offset
10703 + htab->brlt->output_section->vma);
10704
10705 off = (dest
10706 - elf_gp (htab->brlt->output_section->owner)
10707 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10708
10709 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10710 {
10711 info->callbacks->einfo
10712 (_("%P: linkage table error against `%T'\n"),
10713 stub_entry->root.string);
10714 bfd_set_error (bfd_error_bad_value);
10715 htab->stub_error = TRUE;
10716 return FALSE;
10717 }
10718
10719 if (info->emitrelocations)
10720 {
10721 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10722 if (r == NULL)
10723 return FALSE;
10724 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10725 if (bfd_big_endian (info->output_bfd))
10726 r[0].r_offset += 2;
10727 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10728 r[0].r_offset += 4;
10729 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10730 r[0].r_addend = dest;
10731 if (PPC_HA (off) != 0)
10732 {
10733 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10734 r[1].r_offset = r[0].r_offset + 4;
10735 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10736 r[1].r_addend = r[0].r_addend;
10737 }
10738 }
10739
10740 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10741 {
10742 if (PPC_HA (off) != 0)
10743 {
10744 size = 16;
10745 bfd_put_32 (htab->params->stub_bfd,
10746 ADDIS_R12_R2 | PPC_HA (off), loc);
10747 loc += 4;
10748 bfd_put_32 (htab->params->stub_bfd,
10749 LD_R12_0R12 | PPC_LO (off), loc);
10750 }
10751 else
10752 {
10753 size = 12;
10754 bfd_put_32 (htab->params->stub_bfd,
10755 LD_R12_0R2 | PPC_LO (off), loc);
10756 }
10757 }
10758 else
10759 {
10760 bfd_vma r2off = get_r2off (info, stub_entry);
10761
10762 if (r2off == 0 && htab->opd_abi)
10763 {
10764 htab->stub_error = TRUE;
10765 return FALSE;
10766 }
10767
10768 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10769 loc += 4;
10770 size = 16;
10771 if (PPC_HA (off) != 0)
10772 {
10773 size += 4;
10774 bfd_put_32 (htab->params->stub_bfd,
10775 ADDIS_R12_R2 | PPC_HA (off), loc);
10776 loc += 4;
10777 bfd_put_32 (htab->params->stub_bfd,
10778 LD_R12_0R12 | PPC_LO (off), loc);
10779 }
10780 else
10781 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10782
10783 if (PPC_HA (r2off) != 0)
10784 {
10785 size += 4;
10786 loc += 4;
10787 bfd_put_32 (htab->params->stub_bfd,
10788 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10789 }
10790 if (PPC_LO (r2off) != 0)
10791 {
10792 size += 4;
10793 loc += 4;
10794 bfd_put_32 (htab->params->stub_bfd,
10795 ADDI_R2_R2 | PPC_LO (r2off), loc);
10796 }
10797 }
10798 loc += 4;
10799 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10800 loc += 4;
10801 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10802 break;
10803
10804 case ppc_stub_plt_call:
10805 case ppc_stub_plt_call_r2save:
10806 if (stub_entry->h != NULL
10807 && stub_entry->h->is_func_descriptor
10808 && stub_entry->h->oh != NULL)
10809 {
10810 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10811
10812 /* If the old-ABI "dot-symbol" is undefined make it weak so
10813 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10814 FIXME: We used to define the symbol on one of the call
10815 stubs instead, which is why we test symbol section id
10816 against htab->top_id in various places. Likely all
10817 these checks could now disappear. */
10818 if (fh->elf.root.type == bfd_link_hash_undefined)
10819 fh->elf.root.type = bfd_link_hash_undefweak;
10820 /* Stop undo_symbol_twiddle changing it back to undefined. */
10821 fh->was_undefined = 0;
10822 }
10823
10824 /* Now build the stub. */
10825 dest = stub_entry->plt_ent->plt.offset & ~1;
10826 if (dest >= (bfd_vma) -2)
10827 abort ();
10828
10829 plt = htab->elf.splt;
10830 if (!htab->elf.dynamic_sections_created
10831 || stub_entry->h == NULL
10832 || stub_entry->h->elf.dynindx == -1)
10833 plt = htab->elf.iplt;
10834
10835 dest += plt->output_offset + plt->output_section->vma;
10836
10837 if (stub_entry->h == NULL
10838 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10839 {
10840 Elf_Internal_Rela rela;
10841 bfd_byte *rl;
10842
10843 rela.r_offset = dest;
10844 if (htab->opd_abi)
10845 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10846 else
10847 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10848 rela.r_addend = (stub_entry->target_value
10849 + stub_entry->target_section->output_offset
10850 + stub_entry->target_section->output_section->vma);
10851
10852 rl = (htab->elf.irelplt->contents
10853 + (htab->elf.irelplt->reloc_count++
10854 * sizeof (Elf64_External_Rela)));
10855 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10856 stub_entry->plt_ent->plt.offset |= 1;
10857 }
10858
10859 off = (dest
10860 - elf_gp (plt->output_section->owner)
10861 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10862
10863 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10864 {
10865 info->callbacks->einfo
10866 (_("%P: linkage table error against `%T'\n"),
10867 stub_entry->h != NULL
10868 ? stub_entry->h->elf.root.root.string
10869 : "<local sym>");
10870 bfd_set_error (bfd_error_bad_value);
10871 htab->stub_error = TRUE;
10872 return FALSE;
10873 }
10874
10875 if (htab->params->plt_stub_align != 0)
10876 {
10877 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10878
10879 stub_entry->stub_sec->size += pad;
10880 stub_entry->stub_offset = stub_entry->stub_sec->size;
10881 loc += pad;
10882 }
10883
10884 r = NULL;
10885 if (info->emitrelocations)
10886 {
10887 r = get_relocs (stub_entry->stub_sec,
10888 ((PPC_HA (off) != 0)
10889 + (htab->opd_abi
10890 ? 2 + (htab->params->plt_static_chain
10891 && PPC_HA (off + 16) == PPC_HA (off))
10892 : 1)));
10893 if (r == NULL)
10894 return FALSE;
10895 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10896 if (bfd_big_endian (info->output_bfd))
10897 r[0].r_offset += 2;
10898 r[0].r_addend = dest;
10899 }
10900 if (stub_entry->h != NULL
10901 && (stub_entry->h == htab->tls_get_addr_fd
10902 || stub_entry->h == htab->tls_get_addr)
10903 && !htab->params->no_tls_get_addr_opt)
10904 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10905 else
10906 p = build_plt_stub (htab, stub_entry, loc, off, r);
10907 size = p - loc;
10908 break;
10909
10910 default:
10911 BFD_FAIL ();
10912 return FALSE;
10913 }
10914
10915 stub_entry->stub_sec->size += size;
10916
10917 if (htab->params->emit_stub_syms)
10918 {
10919 struct elf_link_hash_entry *h;
10920 size_t len1, len2;
10921 char *name;
10922 const char *const stub_str[] = { "long_branch",
10923 "long_branch_r2off",
10924 "plt_branch",
10925 "plt_branch_r2off",
10926 "plt_call",
10927 "plt_call" };
10928
10929 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10930 len2 = strlen (stub_entry->root.string);
10931 name = bfd_malloc (len1 + len2 + 2);
10932 if (name == NULL)
10933 return FALSE;
10934 memcpy (name, stub_entry->root.string, 9);
10935 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10936 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10937 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10938 if (h == NULL)
10939 return FALSE;
10940 if (h->root.type == bfd_link_hash_new)
10941 {
10942 h->root.type = bfd_link_hash_defined;
10943 h->root.u.def.section = stub_entry->stub_sec;
10944 h->root.u.def.value = stub_entry->stub_offset;
10945 h->ref_regular = 1;
10946 h->def_regular = 1;
10947 h->ref_regular_nonweak = 1;
10948 h->forced_local = 1;
10949 h->non_elf = 0;
10950 }
10951 }
10952
10953 return TRUE;
10954}
10955
10956/* As above, but don't actually build the stub. Just bump offset so
10957 we know stub section sizes, and select plt_branch stubs where
10958 long_branch stubs won't do. */
10959
10960static bfd_boolean
10961ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10962{
10963 struct ppc_stub_hash_entry *stub_entry;
10964 struct bfd_link_info *info;
10965 struct ppc_link_hash_table *htab;
10966 bfd_vma off;
10967 int size;
10968
10969 /* Massage our args to the form they really have. */
10970 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10971 info = in_arg;
10972
10973 htab = ppc_hash_table (info);
10974 if (htab == NULL)
10975 return FALSE;
10976
10977 if (stub_entry->stub_type == ppc_stub_plt_call
10978 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10979 {
10980 asection *plt;
10981 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10982 if (off >= (bfd_vma) -2)
10983 abort ();
10984 plt = htab->elf.splt;
10985 if (!htab->elf.dynamic_sections_created
10986 || stub_entry->h == NULL
10987 || stub_entry->h->elf.dynindx == -1)
10988 plt = htab->elf.iplt;
10989 off += (plt->output_offset
10990 + plt->output_section->vma
10991 - elf_gp (plt->output_section->owner)
10992 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10993
10994 size = plt_stub_size (htab, stub_entry, off);
10995 if (htab->params->plt_stub_align)
10996 size += plt_stub_pad (htab, stub_entry, off);
10997 if (info->emitrelocations)
10998 {
10999 stub_entry->stub_sec->reloc_count
11000 += ((PPC_HA (off) != 0)
11001 + (htab->opd_abi
11002 ? 2 + (htab->params->plt_static_chain
11003 && PPC_HA (off + 16) == PPC_HA (off))
11004 : 1));
11005 stub_entry->stub_sec->flags |= SEC_RELOC;
11006 }
11007 }
11008 else
11009 {
11010 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11011 variants. */
11012 bfd_vma r2off = 0;
11013 bfd_vma local_off = 0;
11014
11015 off = (stub_entry->target_value
11016 + stub_entry->target_section->output_offset
11017 + stub_entry->target_section->output_section->vma);
11018 off -= (stub_entry->stub_sec->size
11019 + stub_entry->stub_sec->output_offset
11020 + stub_entry->stub_sec->output_section->vma);
11021
11022 /* Reset the stub type from the plt variant in case we now
11023 can reach with a shorter stub. */
11024 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11025 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11026
11027 size = 4;
11028 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11029 {
11030 r2off = get_r2off (info, stub_entry);
11031 if (r2off == 0 && htab->opd_abi)
11032 {
11033 htab->stub_error = TRUE;
11034 return FALSE;
11035 }
11036 size = 12;
11037 if (PPC_HA (r2off) != 0)
11038 size = 16;
11039 off -= size - 4;
11040 }
11041
11042 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11043
11044 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11045 Do the same for -R objects without function descriptors. */
11046 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11047 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11048 && r2off == 0))
11049 {
11050 struct ppc_branch_hash_entry *br_entry;
11051
11052 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11053 stub_entry->root.string + 9,
11054 TRUE, FALSE);
11055 if (br_entry == NULL)
11056 {
11057 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11058 stub_entry->root.string);
11059 htab->stub_error = TRUE;
11060 return FALSE;
11061 }
11062
11063 if (br_entry->iter != htab->stub_iteration)
11064 {
11065 br_entry->iter = htab->stub_iteration;
11066 br_entry->offset = htab->brlt->size;
11067 htab->brlt->size += 8;
11068
11069 if (htab->relbrlt != NULL)
11070 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11071 else if (info->emitrelocations)
11072 {
11073 htab->brlt->reloc_count += 1;
11074 htab->brlt->flags |= SEC_RELOC;
11075 }
11076 }
11077
11078 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11079 off = (br_entry->offset
11080 + htab->brlt->output_offset
11081 + htab->brlt->output_section->vma
11082 - elf_gp (htab->brlt->output_section->owner)
11083 - htab->stub_group[stub_entry->id_sec->id].toc_off);
11084
11085 if (info->emitrelocations)
11086 {
11087 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
11088 stub_entry->stub_sec->flags |= SEC_RELOC;
11089 }
11090
11091 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11092 {
11093 size = 12;
11094 if (PPC_HA (off) != 0)
11095 size = 16;
11096 }
11097 else
11098 {
11099 size = 16;
11100 if (PPC_HA (off) != 0)
11101 size += 4;
11102
11103 if (PPC_HA (r2off) != 0)
11104 size += 4;
11105 if (PPC_LO (r2off) != 0)
11106 size += 4;
11107 }
11108 }
11109 else if (info->emitrelocations)
11110 {
11111 stub_entry->stub_sec->reloc_count += 1;
11112 stub_entry->stub_sec->flags |= SEC_RELOC;
11113 }
11114 }
11115
11116 stub_entry->stub_sec->size += size;
11117 return TRUE;
11118}
11119
11120/* Set up various things so that we can make a list of input sections
11121 for each output section included in the link. Returns -1 on error,
11122 0 when no stubs will be needed, and 1 on success. */
11123
11124int
11125ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11126{
11127 bfd *input_bfd;
11128 int top_id, top_index, id;
11129 asection *section;
11130 asection **input_list;
11131 bfd_size_type amt;
11132 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11133
11134 if (htab == NULL)
11135 return -1;
11136
11137 /* Find the top input section id. */
11138 for (input_bfd = info->input_bfds, top_id = 3;
11139 input_bfd != NULL;
11140 input_bfd = input_bfd->link.next)
11141 {
11142 for (section = input_bfd->sections;
11143 section != NULL;
11144 section = section->next)
11145 {
11146 if (top_id < section->id)
11147 top_id = section->id;
11148 }
11149 }
11150
11151 htab->top_id = top_id;
11152 amt = sizeof (struct map_stub) * (top_id + 1);
11153 htab->stub_group = bfd_zmalloc (amt);
11154 if (htab->stub_group == NULL)
11155 return -1;
11156
11157 /* Set toc_off for com, und, abs and ind sections. */
11158 for (id = 0; id < 3; id++)
11159 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11160
11161 /* We can't use output_bfd->section_count here to find the top output
11162 section index as some sections may have been removed, and
11163 strip_excluded_output_sections doesn't renumber the indices. */
11164 for (section = info->output_bfd->sections, top_index = 0;
11165 section != NULL;
11166 section = section->next)
11167 {
11168 if (top_index < section->index)
11169 top_index = section->index;
11170 }
11171
11172 htab->top_index = top_index;
11173 amt = sizeof (asection *) * (top_index + 1);
11174 input_list = bfd_zmalloc (amt);
11175 htab->input_list = input_list;
11176 if (input_list == NULL)
11177 return -1;
11178
11179 return 1;
11180}
11181
11182/* Set up for first pass at multitoc partitioning. */
11183
11184void
11185ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11186{
11187 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11188
11189 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11190 htab->toc_bfd = NULL;
11191 htab->toc_first_sec = NULL;
11192}
11193
11194/* The linker repeatedly calls this function for each TOC input section
11195 and linker generated GOT section. Group input bfds such that the toc
11196 within a group is less than 64k in size. */
11197
11198bfd_boolean
11199ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11200{
11201 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11202 bfd_vma addr, off, limit;
11203
11204 if (htab == NULL)
11205 return FALSE;
11206
11207 if (!htab->second_toc_pass)
11208 {
11209 /* Keep track of the first .toc or .got section for this input bfd. */
11210 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11211
11212 if (new_bfd)
11213 {
11214 htab->toc_bfd = isec->owner;
11215 htab->toc_first_sec = isec;
11216 }
11217
11218 addr = isec->output_offset + isec->output_section->vma;
11219 off = addr - htab->toc_curr;
11220 limit = 0x80008000;
11221 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11222 limit = 0x10000;
11223 if (off + isec->size > limit)
11224 {
11225 addr = (htab->toc_first_sec->output_offset
11226 + htab->toc_first_sec->output_section->vma);
11227 htab->toc_curr = addr;
11228 }
11229
11230 /* toc_curr is the base address of this toc group. Set elf_gp
11231 for the input section to be the offset relative to the
11232 output toc base plus 0x8000. Making the input elf_gp an
11233 offset allows us to move the toc as a whole without
11234 recalculating input elf_gp. */
11235 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11236 off += TOC_BASE_OFF;
11237
11238 /* Die if someone uses a linker script that doesn't keep input
11239 file .toc and .got together. */
11240 if (new_bfd
11241 && elf_gp (isec->owner) != 0
11242 && elf_gp (isec->owner) != off)
11243 return FALSE;
11244
11245 elf_gp (isec->owner) = off;
11246 return TRUE;
11247 }
11248
11249 /* During the second pass toc_first_sec points to the start of
11250 a toc group, and toc_curr is used to track the old elf_gp.
11251 We use toc_bfd to ensure we only look at each bfd once. */
11252 if (htab->toc_bfd == isec->owner)
11253 return TRUE;
11254 htab->toc_bfd = isec->owner;
11255
11256 if (htab->toc_first_sec == NULL
11257 || htab->toc_curr != elf_gp (isec->owner))
11258 {
11259 htab->toc_curr = elf_gp (isec->owner);
11260 htab->toc_first_sec = isec;
11261 }
11262 addr = (htab->toc_first_sec->output_offset
11263 + htab->toc_first_sec->output_section->vma);
11264 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11265 elf_gp (isec->owner) = off;
11266
11267 return TRUE;
11268}
11269
11270/* Called via elf_link_hash_traverse to merge GOT entries for global
11271 symbol H. */
11272
11273static bfd_boolean
11274merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11275{
11276 if (h->root.type == bfd_link_hash_indirect)
11277 return TRUE;
11278
11279 merge_got_entries (&h->got.glist);
11280
11281 return TRUE;
11282}
11283
11284/* Called via elf_link_hash_traverse to allocate GOT entries for global
11285 symbol H. */
11286
11287static bfd_boolean
11288reallocate_got (struct elf_link_hash_entry *h, void *inf)
11289{
11290 struct got_entry *gent;
11291
11292 if (h->root.type == bfd_link_hash_indirect)
11293 return TRUE;
11294
11295 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11296 if (!gent->is_indirect)
11297 allocate_got (h, (struct bfd_link_info *) inf, gent);
11298 return TRUE;
11299}
11300
11301/* Called on the first multitoc pass after the last call to
11302 ppc64_elf_next_toc_section. This function removes duplicate GOT
11303 entries. */
11304
11305bfd_boolean
11306ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11307{
11308 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11309 struct bfd *ibfd, *ibfd2;
11310 bfd_boolean done_something;
11311
11312 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11313
11314 if (!htab->do_multi_toc)
11315 return FALSE;
11316
11317 /* Merge global sym got entries within a toc group. */
11318 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11319
11320 /* And tlsld_got. */
11321 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11322 {
11323 struct got_entry *ent, *ent2;
11324
11325 if (!is_ppc64_elf (ibfd))
11326 continue;
11327
11328 ent = ppc64_tlsld_got (ibfd);
11329 if (!ent->is_indirect
11330 && ent->got.offset != (bfd_vma) -1)
11331 {
11332 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11333 {
11334 if (!is_ppc64_elf (ibfd2))
11335 continue;
11336
11337 ent2 = ppc64_tlsld_got (ibfd2);
11338 if (!ent2->is_indirect
11339 && ent2->got.offset != (bfd_vma) -1
11340 && elf_gp (ibfd2) == elf_gp (ibfd))
11341 {
11342 ent2->is_indirect = TRUE;
11343 ent2->got.ent = ent;
11344 }
11345 }
11346 }
11347 }
11348
11349 /* Zap sizes of got sections. */
11350 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11351 htab->elf.irelplt->size -= htab->got_reli_size;
11352 htab->got_reli_size = 0;
11353
11354 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11355 {
11356 asection *got, *relgot;
11357
11358 if (!is_ppc64_elf (ibfd))
11359 continue;
11360
11361 got = ppc64_elf_tdata (ibfd)->got;
11362 if (got != NULL)
11363 {
11364 got->rawsize = got->size;
11365 got->size = 0;
11366 relgot = ppc64_elf_tdata (ibfd)->relgot;
11367 relgot->rawsize = relgot->size;
11368 relgot->size = 0;
11369 }
11370 }
11371
11372 /* Now reallocate the got, local syms first. We don't need to
11373 allocate section contents again since we never increase size. */
11374 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11375 {
11376 struct got_entry **lgot_ents;
11377 struct got_entry **end_lgot_ents;
11378 struct plt_entry **local_plt;
11379 struct plt_entry **end_local_plt;
11380 unsigned char *lgot_masks;
11381 bfd_size_type locsymcount;
11382 Elf_Internal_Shdr *symtab_hdr;
11383 asection *s;
11384
11385 if (!is_ppc64_elf (ibfd))
11386 continue;
11387
11388 lgot_ents = elf_local_got_ents (ibfd);
11389 if (!lgot_ents)
11390 continue;
11391
11392 symtab_hdr = &elf_symtab_hdr (ibfd);
11393 locsymcount = symtab_hdr->sh_info;
11394 end_lgot_ents = lgot_ents + locsymcount;
11395 local_plt = (struct plt_entry **) end_lgot_ents;
11396 end_local_plt = local_plt + locsymcount;
11397 lgot_masks = (unsigned char *) end_local_plt;
11398 s = ppc64_elf_tdata (ibfd)->got;
11399 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11400 {
11401 struct got_entry *ent;
11402
11403 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11404 {
11405 unsigned int ent_size = 8;
11406 unsigned int rel_size = sizeof (Elf64_External_Rela);
11407
11408 ent->got.offset = s->size;
11409 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11410 {
11411 ent_size *= 2;
11412 rel_size *= 2;
11413 }
11414 s->size += ent_size;
11415 if ((*lgot_masks & PLT_IFUNC) != 0)
11416 {
11417 htab->elf.irelplt->size += rel_size;
11418 htab->got_reli_size += rel_size;
11419 }
11420 else if (info->shared)
11421 {
11422 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11423 srel->size += rel_size;
11424 }
11425 }
11426 }
11427 }
11428
11429 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11430
11431 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11432 {
11433 struct got_entry *ent;
11434
11435 if (!is_ppc64_elf (ibfd))
11436 continue;
11437
11438 ent = ppc64_tlsld_got (ibfd);
11439 if (!ent->is_indirect
11440 && ent->got.offset != (bfd_vma) -1)
11441 {
11442 asection *s = ppc64_elf_tdata (ibfd)->got;
11443 ent->got.offset = s->size;
11444 s->size += 16;
11445 if (info->shared)
11446 {
11447 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11448 srel->size += sizeof (Elf64_External_Rela);
11449 }
11450 }
11451 }
11452
11453 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11454 if (!done_something)
11455 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11456 {
11457 asection *got;
11458
11459 if (!is_ppc64_elf (ibfd))
11460 continue;
11461
11462 got = ppc64_elf_tdata (ibfd)->got;
11463 if (got != NULL)
11464 {
11465 done_something = got->rawsize != got->size;
11466 if (done_something)
11467 break;
11468 }
11469 }
11470
11471 if (done_something)
11472 (*htab->params->layout_sections_again) ();
11473
11474 /* Set up for second pass over toc sections to recalculate elf_gp
11475 on input sections. */
11476 htab->toc_bfd = NULL;
11477 htab->toc_first_sec = NULL;
11478 htab->second_toc_pass = TRUE;
11479 return done_something;
11480}
11481
11482/* Called after second pass of multitoc partitioning. */
11483
11484void
11485ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11486{
11487 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11488
11489 /* After the second pass, toc_curr tracks the TOC offset used
11490 for code sections below in ppc64_elf_next_input_section. */
11491 htab->toc_curr = TOC_BASE_OFF;
11492}
11493
11494/* No toc references were found in ISEC. If the code in ISEC makes no
11495 calls, then there's no need to use toc adjusting stubs when branching
11496 into ISEC. Actually, indirect calls from ISEC are OK as they will
11497 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11498 needed, and 2 if a cyclical call-graph was found but no other reason
11499 for a stub was detected. If called from the top level, a return of
11500 2 means the same as a return of 0. */
11501
11502static int
11503toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11504{
11505 int ret;
11506
11507 /* Mark this section as checked. */
11508 isec->call_check_done = 1;
11509
11510 /* We know none of our code bearing sections will need toc stubs. */
11511 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11512 return 0;
11513
11514 if (isec->size == 0)
11515 return 0;
11516
11517 if (isec->output_section == NULL)
11518 return 0;
11519
11520 ret = 0;
11521 if (isec->reloc_count != 0)
11522 {
11523 Elf_Internal_Rela *relstart, *rel;
11524 Elf_Internal_Sym *local_syms;
11525 struct ppc_link_hash_table *htab;
11526
11527 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11528 info->keep_memory);
11529 if (relstart == NULL)
11530 return -1;
11531
11532 /* Look for branches to outside of this section. */
11533 local_syms = NULL;
11534 htab = ppc_hash_table (info);
11535 if (htab == NULL)
11536 return -1;
11537
11538 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11539 {
11540 enum elf_ppc64_reloc_type r_type;
11541 unsigned long r_symndx;
11542 struct elf_link_hash_entry *h;
11543 struct ppc_link_hash_entry *eh;
11544 Elf_Internal_Sym *sym;
11545 asection *sym_sec;
11546 struct _opd_sec_data *opd;
11547 bfd_vma sym_value;
11548 bfd_vma dest;
11549
11550 r_type = ELF64_R_TYPE (rel->r_info);
11551 if (r_type != R_PPC64_REL24
11552 && r_type != R_PPC64_REL14
11553 && r_type != R_PPC64_REL14_BRTAKEN
11554 && r_type != R_PPC64_REL14_BRNTAKEN)
11555 continue;
11556
11557 r_symndx = ELF64_R_SYM (rel->r_info);
11558 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11559 isec->owner))
11560 {
11561 ret = -1;
11562 break;
11563 }
11564
11565 /* Calls to dynamic lib functions go through a plt call stub
11566 that uses r2. */
11567 eh = (struct ppc_link_hash_entry *) h;
11568 if (eh != NULL
11569 && (eh->elf.plt.plist != NULL
11570 || (eh->oh != NULL
11571 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11572 {
11573 ret = 1;
11574 break;
11575 }
11576
11577 if (sym_sec == NULL)
11578 /* Ignore other undefined symbols. */
11579 continue;
11580
11581 /* Assume branches to other sections not included in the
11582 link need stubs too, to cover -R and absolute syms. */
11583 if (sym_sec->output_section == NULL)
11584 {
11585 ret = 1;
11586 break;
11587 }
11588
11589 if (h == NULL)
11590 sym_value = sym->st_value;
11591 else
11592 {
11593 if (h->root.type != bfd_link_hash_defined
11594 && h->root.type != bfd_link_hash_defweak)
11595 abort ();
11596 sym_value = h->root.u.def.value;
11597 }
11598 sym_value += rel->r_addend;
11599
11600 /* If this branch reloc uses an opd sym, find the code section. */
11601 opd = get_opd_info (sym_sec);
11602 if (opd != NULL)
11603 {
11604 if (h == NULL && opd->adjust != NULL)
11605 {
11606 long adjust;
11607
11608 adjust = opd->adjust[OPD_NDX (sym->st_value)];
11609 if (adjust == -1)
11610 /* Assume deleted functions won't ever be called. */
11611 continue;
11612 sym_value += adjust;
11613 }
11614
11615 dest = opd_entry_value (sym_sec, sym_value,
11616 &sym_sec, NULL, FALSE);
11617 if (dest == (bfd_vma) -1)
11618 continue;
11619 }
11620 else
11621 dest = (sym_value
11622 + sym_sec->output_offset
11623 + sym_sec->output_section->vma);
11624
11625 /* Ignore branch to self. */
11626 if (sym_sec == isec)
11627 continue;
11628
11629 /* If the called function uses the toc, we need a stub. */
11630 if (sym_sec->has_toc_reloc
11631 || sym_sec->makes_toc_func_call)
11632 {
11633 ret = 1;
11634 break;
11635 }
11636
11637 /* Assume any branch that needs a long branch stub might in fact
11638 need a plt_branch stub. A plt_branch stub uses r2. */
11639 else if (dest - (isec->output_offset
11640 + isec->output_section->vma
11641 + rel->r_offset) + (1 << 25)
11642 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11643 ? h->other
11644 : sym->st_other))
11645 {
11646 ret = 1;
11647 break;
11648 }
11649
11650 /* If calling back to a section in the process of being
11651 tested, we can't say for sure that no toc adjusting stubs
11652 are needed, so don't return zero. */
11653 else if (sym_sec->call_check_in_progress)
11654 ret = 2;
11655
11656 /* Branches to another section that itself doesn't have any TOC
11657 references are OK. Recursively call ourselves to check. */
11658 else if (!sym_sec->call_check_done)
11659 {
11660 int recur;
11661
11662 /* Mark current section as indeterminate, so that other
11663 sections that call back to current won't be marked as
11664 known. */
11665 isec->call_check_in_progress = 1;
11666 recur = toc_adjusting_stub_needed (info, sym_sec);
11667 isec->call_check_in_progress = 0;
11668
11669 if (recur != 0)
11670 {
11671 ret = recur;
11672 if (recur != 2)
11673 break;
11674 }
11675 }
11676 }
11677
11678 if (local_syms != NULL
11679 && (elf_symtab_hdr (isec->owner).contents
11680 != (unsigned char *) local_syms))
11681 free (local_syms);
11682 if (elf_section_data (isec)->relocs != relstart)
11683 free (relstart);
11684 }
11685
11686 if ((ret & 1) == 0
11687 && isec->map_head.s != NULL
11688 && (strcmp (isec->output_section->name, ".init") == 0
11689 || strcmp (isec->output_section->name, ".fini") == 0))
11690 {
11691 if (isec->map_head.s->has_toc_reloc
11692 || isec->map_head.s->makes_toc_func_call)
11693 ret = 1;
11694 else if (!isec->map_head.s->call_check_done)
11695 {
11696 int recur;
11697 isec->call_check_in_progress = 1;
11698 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11699 isec->call_check_in_progress = 0;
11700 if (recur != 0)
11701 ret = recur;
11702 }
11703 }
11704
11705 if (ret == 1)
11706 isec->makes_toc_func_call = 1;
11707
11708 return ret;
11709}
11710
11711/* The linker repeatedly calls this function for each input section,
11712 in the order that input sections are linked into output sections.
11713 Build lists of input sections to determine groupings between which
11714 we may insert linker stubs. */
11715
11716bfd_boolean
11717ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11718{
11719 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11720
11721 if (htab == NULL)
11722 return FALSE;
11723
11724 if ((isec->output_section->flags & SEC_CODE) != 0
11725 && isec->output_section->index <= htab->top_index)
11726 {
11727 asection **list = htab->input_list + isec->output_section->index;
11728 /* Steal the link_sec pointer for our list. */
11729#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11730 /* This happens to make the list in reverse order,
11731 which is what we want. */
11732 PREV_SEC (isec) = *list;
11733 *list = isec;
11734 }
11735
11736 if (htab->multi_toc_needed)
11737 {
11738 /* Analyse sections that aren't already flagged as needing a
11739 valid toc pointer. Exclude .fixup for the linux kernel.
11740 .fixup contains branches, but only back to the function that
11741 hit an exception. */
11742 if (!(isec->has_toc_reloc
11743 || (isec->flags & SEC_CODE) == 0
11744 || strcmp (isec->name, ".fixup") == 0
11745 || isec->call_check_done))
11746 {
11747 if (toc_adjusting_stub_needed (info, isec) < 0)
11748 return FALSE;
11749 }
11750 /* Make all sections use the TOC assigned for this object file.
11751 This will be wrong for pasted sections; We fix that in
11752 check_pasted_section(). */
11753 if (elf_gp (isec->owner) != 0)
11754 htab->toc_curr = elf_gp (isec->owner);
11755 }
11756
11757 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11758 return TRUE;
11759}
11760
11761/* Check that all .init and .fini sections use the same toc, if they
11762 have toc relocs. */
11763
11764static bfd_boolean
11765check_pasted_section (struct bfd_link_info *info, const char *name)
11766{
11767 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11768
11769 if (o != NULL)
11770 {
11771 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11772 bfd_vma toc_off = 0;
11773 asection *i;
11774
11775 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11776 if (i->has_toc_reloc)
11777 {
11778 if (toc_off == 0)
11779 toc_off = htab->stub_group[i->id].toc_off;
11780 else if (toc_off != htab->stub_group[i->id].toc_off)
11781 return FALSE;
11782 }
11783
11784 if (toc_off == 0)
11785 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11786 if (i->makes_toc_func_call)
11787 {
11788 toc_off = htab->stub_group[i->id].toc_off;
11789 break;
11790 }
11791
11792 /* Make sure the whole pasted function uses the same toc offset. */
11793 if (toc_off != 0)
11794 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11795 htab->stub_group[i->id].toc_off = toc_off;
11796 }
11797 return TRUE;
11798}
11799
11800bfd_boolean
11801ppc64_elf_check_init_fini (struct bfd_link_info *info)
11802{
11803 return (check_pasted_section (info, ".init")
11804 & check_pasted_section (info, ".fini"));
11805}
11806
11807/* See whether we can group stub sections together. Grouping stub
11808 sections may result in fewer stubs. More importantly, we need to
11809 put all .init* and .fini* stubs at the beginning of the .init or
11810 .fini output sections respectively, because glibc splits the
11811 _init and _fini functions into multiple parts. Putting a stub in
11812 the middle of a function is not a good idea. */
11813
11814static void
11815group_sections (struct ppc_link_hash_table *htab,
11816 bfd_size_type stub_group_size,
11817 bfd_boolean stubs_always_before_branch)
11818{
11819 asection **list;
11820 bfd_size_type stub14_group_size;
11821 bfd_boolean suppress_size_errors;
11822
11823 suppress_size_errors = FALSE;
11824 stub14_group_size = stub_group_size >> 10;
11825 if (stub_group_size == 1)
11826 {
11827 /* Default values. */
11828 if (stubs_always_before_branch)
11829 {
11830 stub_group_size = 0x1e00000;
11831 stub14_group_size = 0x7800;
11832 }
11833 else
11834 {
11835 stub_group_size = 0x1c00000;
11836 stub14_group_size = 0x7000;
11837 }
11838 suppress_size_errors = TRUE;
11839 }
11840
11841 list = htab->input_list + htab->top_index;
11842 do
11843 {
11844 asection *tail = *list;
11845 while (tail != NULL)
11846 {
11847 asection *curr;
11848 asection *prev;
11849 bfd_size_type total;
11850 bfd_boolean big_sec;
11851 bfd_vma curr_toc;
11852
11853 curr = tail;
11854 total = tail->size;
11855 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11856 && ppc64_elf_section_data (tail)->has_14bit_branch
11857 ? stub14_group_size : stub_group_size);
11858 if (big_sec && !suppress_size_errors)
11859 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11860 tail->owner, tail);
11861 curr_toc = htab->stub_group[tail->id].toc_off;
11862
11863 while ((prev = PREV_SEC (curr)) != NULL
11864 && ((total += curr->output_offset - prev->output_offset)
11865 < (ppc64_elf_section_data (prev) != NULL
11866 && ppc64_elf_section_data (prev)->has_14bit_branch
11867 ? stub14_group_size : stub_group_size))
11868 && htab->stub_group[prev->id].toc_off == curr_toc)
11869 curr = prev;
11870
11871 /* OK, the size from the start of CURR to the end is less
11872 than stub_group_size and thus can be handled by one stub
11873 section. (or the tail section is itself larger than
11874 stub_group_size, in which case we may be toast.) We
11875 should really be keeping track of the total size of stubs
11876 added here, as stubs contribute to the final output
11877 section size. That's a little tricky, and this way will
11878 only break if stubs added make the total size more than
11879 2^25, ie. for the default stub_group_size, if stubs total
11880 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11881 do
11882 {
11883 prev = PREV_SEC (tail);
11884 /* Set up this stub group. */
11885 htab->stub_group[tail->id].link_sec = curr;
11886 }
11887 while (tail != curr && (tail = prev) != NULL);
11888
11889 /* But wait, there's more! Input sections up to stub_group_size
11890 bytes before the stub section can be handled by it too.
11891 Don't do this if we have a really large section after the
11892 stubs, as adding more stubs increases the chance that
11893 branches may not reach into the stub section. */
11894 if (!stubs_always_before_branch && !big_sec)
11895 {
11896 total = 0;
11897 while (prev != NULL
11898 && ((total += tail->output_offset - prev->output_offset)
11899 < (ppc64_elf_section_data (prev) != NULL
11900 && ppc64_elf_section_data (prev)->has_14bit_branch
11901 ? stub14_group_size : stub_group_size))
11902 && htab->stub_group[prev->id].toc_off == curr_toc)
11903 {
11904 tail = prev;
11905 prev = PREV_SEC (tail);
11906 htab->stub_group[tail->id].link_sec = curr;
11907 }
11908 }
11909 tail = prev;
11910 }
11911 }
11912 while (list-- != htab->input_list);
11913 free (htab->input_list);
11914#undef PREV_SEC
11915}
11916
11917static const unsigned char glink_eh_frame_cie[] =
11918{
11919 0, 0, 0, 16, /* length. */
11920 0, 0, 0, 0, /* id. */
11921 1, /* CIE version. */
11922 'z', 'R', 0, /* Augmentation string. */
11923 4, /* Code alignment. */
11924 0x78, /* Data alignment. */
11925 65, /* RA reg. */
11926 1, /* Augmentation size. */
11927 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11928 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
11929 0, 0, 0, 0
11930};
11931
11932/* Stripping output sections is normally done before dynamic section
11933 symbols have been allocated. This function is called later, and
11934 handles cases like htab->brlt which is mapped to its own output
11935 section. */
11936
11937static void
11938maybe_strip_output (struct bfd_link_info *info, asection *isec)
11939{
11940 if (isec->size == 0
11941 && isec->output_section->size == 0
11942 && !(isec->output_section->flags & SEC_KEEP)
11943 && !bfd_section_removed_from_list (info->output_bfd,
11944 isec->output_section)
11945 && elf_section_data (isec->output_section)->dynindx == 0)
11946 {
11947 isec->output_section->flags |= SEC_EXCLUDE;
11948 bfd_section_list_remove (info->output_bfd, isec->output_section);
11949 info->output_bfd->section_count--;
11950 }
11951}
11952
11953/* Determine and set the size of the stub section for a final link.
11954
11955 The basic idea here is to examine all the relocations looking for
11956 PC-relative calls to a target that is unreachable with a "bl"
11957 instruction. */
11958
11959bfd_boolean
11960ppc64_elf_size_stubs (struct bfd_link_info *info)
11961{
11962 bfd_size_type stub_group_size;
11963 bfd_boolean stubs_always_before_branch;
11964 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11965
11966 if (htab == NULL)
11967 return FALSE;
11968
11969 if (htab->params->plt_thread_safe == -1 && !info->executable)
11970 htab->params->plt_thread_safe = 1;
11971 if (!htab->opd_abi)
11972 htab->params->plt_thread_safe = 0;
11973 else if (htab->params->plt_thread_safe == -1)
11974 {
11975 static const char *const thread_starter[] =
11976 {
11977 "pthread_create",
11978 /* libstdc++ */
11979 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11980 /* librt */
11981 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11982 "mq_notify", "create_timer",
11983 /* libanl */
11984 "getaddrinfo_a",
11985 /* libgomp */
11986 "GOMP_parallel",
11987 "GOMP_parallel_start",
11988 "GOMP_parallel_loop_static",
11989 "GOMP_parallel_loop_static_start",
11990 "GOMP_parallel_loop_dynamic",
11991 "GOMP_parallel_loop_dynamic_start",
11992 "GOMP_parallel_loop_guided",
11993 "GOMP_parallel_loop_guided_start",
11994 "GOMP_parallel_loop_runtime",
11995 "GOMP_parallel_loop_runtime_start",
11996 "GOMP_parallel_sections",
11997 "GOMP_parallel_sections_start",
11998 /* libgo */
11999 "__go_go",
12000 };
12001 unsigned i;
12002
12003 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
12004 {
12005 struct elf_link_hash_entry *h;
12006 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12007 FALSE, FALSE, TRUE);
12008 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12009 if (htab->params->plt_thread_safe)
12010 break;
12011 }
12012 }
12013 stubs_always_before_branch = htab->params->group_size < 0;
12014 if (htab->params->group_size < 0)
12015 stub_group_size = -htab->params->group_size;
12016 else
12017 stub_group_size = htab->params->group_size;
12018
12019 group_sections (htab, stub_group_size, stubs_always_before_branch);
12020
12021 while (1)
12022 {
12023 bfd *input_bfd;
12024 unsigned int bfd_indx;
12025 asection *stub_sec;
12026
12027 htab->stub_iteration += 1;
12028
12029 for (input_bfd = info->input_bfds, bfd_indx = 0;
12030 input_bfd != NULL;
12031 input_bfd = input_bfd->link.next, bfd_indx++)
12032 {
12033 Elf_Internal_Shdr *symtab_hdr;
12034 asection *section;
12035 Elf_Internal_Sym *local_syms = NULL;
12036
12037 if (!is_ppc64_elf (input_bfd))
12038 continue;
12039
12040 /* We'll need the symbol table in a second. */
12041 symtab_hdr = &elf_symtab_hdr (input_bfd);
12042 if (symtab_hdr->sh_info == 0)
12043 continue;
12044
12045 /* Walk over each section attached to the input bfd. */
12046 for (section = input_bfd->sections;
12047 section != NULL;
12048 section = section->next)
12049 {
12050 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12051
12052 /* If there aren't any relocs, then there's nothing more
12053 to do. */
12054 if ((section->flags & SEC_RELOC) == 0
12055 || (section->flags & SEC_ALLOC) == 0
12056 || (section->flags & SEC_LOAD) == 0
12057 || (section->flags & SEC_CODE) == 0
12058 || section->reloc_count == 0)
12059 continue;
12060
12061 /* If this section is a link-once section that will be
12062 discarded, then don't create any stubs. */
12063 if (section->output_section == NULL
12064 || section->output_section->owner != info->output_bfd)
12065 continue;
12066
12067 /* Get the relocs. */
12068 internal_relocs
12069 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12070 info->keep_memory);
12071 if (internal_relocs == NULL)
12072 goto error_ret_free_local;
12073
12074 /* Now examine each relocation. */
12075 irela = internal_relocs;
12076 irelaend = irela + section->reloc_count;
12077 for (; irela < irelaend; irela++)
12078 {
12079 enum elf_ppc64_reloc_type r_type;
12080 unsigned int r_indx;
12081 enum ppc_stub_type stub_type;
12082 struct ppc_stub_hash_entry *stub_entry;
12083 asection *sym_sec, *code_sec;
12084 bfd_vma sym_value, code_value;
12085 bfd_vma destination;
12086 unsigned long local_off;
12087 bfd_boolean ok_dest;
12088 struct ppc_link_hash_entry *hash;
12089 struct ppc_link_hash_entry *fdh;
12090 struct elf_link_hash_entry *h;
12091 Elf_Internal_Sym *sym;
12092 char *stub_name;
12093 const asection *id_sec;
12094 struct _opd_sec_data *opd;
12095 struct plt_entry *plt_ent;
12096
12097 r_type = ELF64_R_TYPE (irela->r_info);
12098 r_indx = ELF64_R_SYM (irela->r_info);
12099
12100 if (r_type >= R_PPC64_max)
12101 {
12102 bfd_set_error (bfd_error_bad_value);
12103 goto error_ret_free_internal;
12104 }
12105
12106 /* Only look for stubs on branch instructions. */
12107 if (r_type != R_PPC64_REL24
12108 && r_type != R_PPC64_REL14
12109 && r_type != R_PPC64_REL14_BRTAKEN
12110 && r_type != R_PPC64_REL14_BRNTAKEN)
12111 continue;
12112
12113 /* Now determine the call target, its name, value,
12114 section. */
12115 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12116 r_indx, input_bfd))
12117 goto error_ret_free_internal;
12118 hash = (struct ppc_link_hash_entry *) h;
12119
12120 ok_dest = FALSE;
12121 fdh = NULL;
12122 sym_value = 0;
12123 if (hash == NULL)
12124 {
12125 sym_value = sym->st_value;
12126 ok_dest = TRUE;
12127 }
12128 else if (hash->elf.root.type == bfd_link_hash_defined
12129 || hash->elf.root.type == bfd_link_hash_defweak)
12130 {
12131 sym_value = hash->elf.root.u.def.value;
12132 if (sym_sec->output_section != NULL)
12133 ok_dest = TRUE;
12134 }
12135 else if (hash->elf.root.type == bfd_link_hash_undefweak
12136 || hash->elf.root.type == bfd_link_hash_undefined)
12137 {
12138 /* Recognise an old ABI func code entry sym, and
12139 use the func descriptor sym instead if it is
12140 defined. */
12141 if (hash->elf.root.root.string[0] == '.'
12142 && (fdh = lookup_fdh (hash, htab)) != NULL)
12143 {
12144 if (fdh->elf.root.type == bfd_link_hash_defined
12145 || fdh->elf.root.type == bfd_link_hash_defweak)
12146 {
12147 sym_sec = fdh->elf.root.u.def.section;
12148 sym_value = fdh->elf.root.u.def.value;
12149 if (sym_sec->output_section != NULL)
12150 ok_dest = TRUE;
12151 }
12152 else
12153 fdh = NULL;
12154 }
12155 }
12156 else
12157 {
12158 bfd_set_error (bfd_error_bad_value);
12159 goto error_ret_free_internal;
12160 }
12161
12162 destination = 0;
12163 local_off = 0;
12164 if (ok_dest)
12165 {
12166 sym_value += irela->r_addend;
12167 destination = (sym_value
12168 + sym_sec->output_offset
12169 + sym_sec->output_section->vma);
12170 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12171 ? hash->elf.other
12172 : sym->st_other);
12173 }
12174
12175 code_sec = sym_sec;
12176 code_value = sym_value;
12177 opd = get_opd_info (sym_sec);
12178 if (opd != NULL)
12179 {
12180 bfd_vma dest;
12181
12182 if (hash == NULL && opd->adjust != NULL)
12183 {
12184 long adjust = opd->adjust[OPD_NDX (sym_value)];
12185 if (adjust == -1)
12186 continue;
12187 code_value += adjust;
12188 sym_value += adjust;
12189 }
12190 dest = opd_entry_value (sym_sec, sym_value,
12191 &code_sec, &code_value, FALSE);
12192 if (dest != (bfd_vma) -1)
12193 {
12194 destination = dest;
12195 if (fdh != NULL)
12196 {
12197 /* Fixup old ABI sym to point at code
12198 entry. */
12199 hash->elf.root.type = bfd_link_hash_defweak;
12200 hash->elf.root.u.def.section = code_sec;
12201 hash->elf.root.u.def.value = code_value;
12202 }
12203 }
12204 }
12205
12206 /* Determine what (if any) linker stub is needed. */
12207 plt_ent = NULL;
12208 stub_type = ppc_type_of_stub (section, irela, &hash,
12209 &plt_ent, destination,
12210 local_off);
12211
12212 if (stub_type != ppc_stub_plt_call)
12213 {
12214 /* Check whether we need a TOC adjusting stub.
12215 Since the linker pastes together pieces from
12216 different object files when creating the
12217 _init and _fini functions, it may be that a
12218 call to what looks like a local sym is in
12219 fact a call needing a TOC adjustment. */
12220 if (code_sec != NULL
12221 && code_sec->output_section != NULL
12222 && (htab->stub_group[code_sec->id].toc_off
12223 != htab->stub_group[section->id].toc_off)
12224 && (code_sec->has_toc_reloc
12225 || code_sec->makes_toc_func_call))
12226 stub_type = ppc_stub_long_branch_r2off;
12227 }
12228
12229 if (stub_type == ppc_stub_none)
12230 continue;
12231
12232 /* __tls_get_addr calls might be eliminated. */
12233 if (stub_type != ppc_stub_plt_call
12234 && hash != NULL
12235 && (hash == htab->tls_get_addr
12236 || hash == htab->tls_get_addr_fd)
12237 && section->has_tls_reloc
12238 && irela != internal_relocs)
12239 {
12240 /* Get tls info. */
12241 unsigned char *tls_mask;
12242
12243 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12244 irela - 1, input_bfd))
12245 goto error_ret_free_internal;
12246 if (*tls_mask != 0)
12247 continue;
12248 }
12249
12250 if (stub_type == ppc_stub_plt_call
12251 && irela + 1 < irelaend
12252 && irela[1].r_offset == irela->r_offset + 4
12253 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12254 {
12255 if (!tocsave_find (htab, INSERT,
12256 &local_syms, irela + 1, input_bfd))
12257 goto error_ret_free_internal;
12258 }
12259 else if (stub_type == ppc_stub_plt_call)
12260 stub_type = ppc_stub_plt_call_r2save;
12261
12262 /* Support for grouping stub sections. */
12263 id_sec = htab->stub_group[section->id].link_sec;
12264
12265 /* Get the name of this stub. */
12266 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12267 if (!stub_name)
12268 goto error_ret_free_internal;
12269
12270 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12271 stub_name, FALSE, FALSE);
12272 if (stub_entry != NULL)
12273 {
12274 /* The proper stub has already been created. */
12275 free (stub_name);
12276 if (stub_type == ppc_stub_plt_call_r2save)
12277 stub_entry->stub_type = stub_type;
12278 continue;
12279 }
12280
12281 stub_entry = ppc_add_stub (stub_name, section, info);
12282 if (stub_entry == NULL)
12283 {
12284 free (stub_name);
12285 error_ret_free_internal:
12286 if (elf_section_data (section)->relocs == NULL)
12287 free (internal_relocs);
12288 error_ret_free_local:
12289 if (local_syms != NULL
12290 && (symtab_hdr->contents
12291 != (unsigned char *) local_syms))
12292 free (local_syms);
12293 return FALSE;
12294 }
12295
12296 stub_entry->stub_type = stub_type;
12297 if (stub_type != ppc_stub_plt_call
12298 && stub_type != ppc_stub_plt_call_r2save)
12299 {
12300 stub_entry->target_value = code_value;
12301 stub_entry->target_section = code_sec;
12302 }
12303 else
12304 {
12305 stub_entry->target_value = sym_value;
12306 stub_entry->target_section = sym_sec;
12307 }
12308 stub_entry->h = hash;
12309 stub_entry->plt_ent = plt_ent;
12310 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12311
12312 if (stub_entry->h != NULL)
12313 htab->stub_globals += 1;
12314 }
12315
12316 /* We're done with the internal relocs, free them. */
12317 if (elf_section_data (section)->relocs != internal_relocs)
12318 free (internal_relocs);
12319 }
12320
12321 if (local_syms != NULL
12322 && symtab_hdr->contents != (unsigned char *) local_syms)
12323 {
12324 if (!info->keep_memory)
12325 free (local_syms);
12326 else
12327 symtab_hdr->contents = (unsigned char *) local_syms;
12328 }
12329 }
12330
12331 /* We may have added some stubs. Find out the new size of the
12332 stub sections. */
12333 for (stub_sec = htab->params->stub_bfd->sections;
12334 stub_sec != NULL;
12335 stub_sec = stub_sec->next)
12336 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12337 {
12338 stub_sec->rawsize = stub_sec->size;
12339 stub_sec->size = 0;
12340 stub_sec->reloc_count = 0;
12341 stub_sec->flags &= ~SEC_RELOC;
12342 }
12343
12344 htab->brlt->size = 0;
12345 htab->brlt->reloc_count = 0;
12346 htab->brlt->flags &= ~SEC_RELOC;
12347 if (htab->relbrlt != NULL)
12348 htab->relbrlt->size = 0;
12349
12350 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12351
12352 if (info->emitrelocations
12353 && htab->glink != NULL && htab->glink->size != 0)
12354 {
12355 htab->glink->reloc_count = 1;
12356 htab->glink->flags |= SEC_RELOC;
12357 }
12358
12359 if (htab->glink_eh_frame != NULL
12360 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12361 && htab->glink_eh_frame->output_section->size != 0)
12362 {
12363 size_t size = 0, align;
12364
12365 for (stub_sec = htab->params->stub_bfd->sections;
12366 stub_sec != NULL;
12367 stub_sec = stub_sec->next)
12368 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12369 size += 24;
12370 if (htab->glink != NULL && htab->glink->size != 0)
12371 size += 24;
12372 if (size != 0)
12373 size += sizeof (glink_eh_frame_cie);
12374 align = 1;
12375 align <<= htab->glink_eh_frame->output_section->alignment_power;
12376 align -= 1;
12377 size = (size + align) & ~align;
12378 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12379 htab->glink_eh_frame->size = size;
12380 }
12381
12382 if (htab->params->plt_stub_align != 0)
12383 for (stub_sec = htab->params->stub_bfd->sections;
12384 stub_sec != NULL;
12385 stub_sec = stub_sec->next)
12386 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12387 stub_sec->size = ((stub_sec->size
12388 + (1 << htab->params->plt_stub_align) - 1)
12389 & (-1 << htab->params->plt_stub_align));
12390
12391 for (stub_sec = htab->params->stub_bfd->sections;
12392 stub_sec != NULL;
12393 stub_sec = stub_sec->next)
12394 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12395 && stub_sec->rawsize != stub_sec->size)
12396 break;
12397
12398 /* Exit from this loop when no stubs have been added, and no stubs
12399 have changed size. */
12400 if (stub_sec == NULL
12401 && (htab->glink_eh_frame == NULL
12402 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12403 break;
12404
12405 /* Ask the linker to do its stuff. */
12406 (*htab->params->layout_sections_again) ();
12407 }
12408
12409 if (htab->glink_eh_frame != NULL
12410 && htab->glink_eh_frame->size != 0)
12411 {
12412 bfd_vma val;
12413 bfd_byte *p, *last_fde;
12414 size_t last_fde_len, size, align, pad;
12415 asection *stub_sec;
12416
12417 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12418 if (p == NULL)
12419 return FALSE;
12420 htab->glink_eh_frame->contents = p;
12421 last_fde = p;
12422
12423 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12424 /* CIE length (rewrite in case little-endian). */
12425 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12426 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12427 p += sizeof (glink_eh_frame_cie);
12428
12429 for (stub_sec = htab->params->stub_bfd->sections;
12430 stub_sec != NULL;
12431 stub_sec = stub_sec->next)
12432 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12433 {
12434 last_fde = p;
12435 last_fde_len = 20;
12436 /* FDE length. */
12437 bfd_put_32 (htab->elf.dynobj, 20, p);
12438 p += 4;
12439 /* CIE pointer. */
12440 val = p - htab->glink_eh_frame->contents;
12441 bfd_put_32 (htab->elf.dynobj, val, p);
12442 p += 4;
12443 /* Offset to stub section, written later. */
12444 p += 4;
12445 /* stub section size. */
12446 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12447 p += 4;
12448 /* Augmentation. */
12449 p += 1;
12450 /* Pad. */
12451 p += 7;
12452 }
12453 if (htab->glink != NULL && htab->glink->size != 0)
12454 {
12455 last_fde = p;
12456 last_fde_len = 20;
12457 /* FDE length. */
12458 bfd_put_32 (htab->elf.dynobj, 20, p);
12459 p += 4;
12460 /* CIE pointer. */
12461 val = p - htab->glink_eh_frame->contents;
12462 bfd_put_32 (htab->elf.dynobj, val, p);
12463 p += 4;
12464 /* Offset to .glink, written later. */
12465 p += 4;
12466 /* .glink size. */
12467 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12468 p += 4;
12469 /* Augmentation. */
12470 p += 1;
12471
12472 *p++ = DW_CFA_advance_loc + 1;
12473 *p++ = DW_CFA_register;
12474 *p++ = 65;
12475 *p++ = 12;
12476 *p++ = DW_CFA_advance_loc + 4;
12477 *p++ = DW_CFA_restore_extended;
12478 *p++ = 65;
12479 }
12480 /* Subsume any padding into the last FDE if user .eh_frame
12481 sections are aligned more than glink_eh_frame. Otherwise any
12482 zero padding will be seen as a terminator. */
12483 size = p - htab->glink_eh_frame->contents;
12484 align = 1;
12485 align <<= htab->glink_eh_frame->output_section->alignment_power;
12486 align -= 1;
12487 pad = ((size + align) & ~align) - size;
12488 htab->glink_eh_frame->size = size + pad;
12489 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12490 }
12491
12492 maybe_strip_output (info, htab->brlt);
12493 if (htab->glink_eh_frame != NULL)
12494 maybe_strip_output (info, htab->glink_eh_frame);
12495
12496 return TRUE;
12497}
12498
12499/* Called after we have determined section placement. If sections
12500 move, we'll be called again. Provide a value for TOCstart. */
12501
12502bfd_vma
12503ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12504{
12505 asection *s;
12506 bfd_vma TOCstart;
12507
12508 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12509 order. The TOC starts where the first of these sections starts. */
12510 s = bfd_get_section_by_name (obfd, ".got");
12511 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12512 s = bfd_get_section_by_name (obfd, ".toc");
12513 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12514 s = bfd_get_section_by_name (obfd, ".tocbss");
12515 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12516 s = bfd_get_section_by_name (obfd, ".plt");
12517 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12518 {
12519 /* This may happen for
12520 o references to TOC base (SYM@toc / TOC[tc0]) without a
12521 .toc directive
12522 o bad linker script
12523 o --gc-sections and empty TOC sections
12524
12525 FIXME: Warn user? */
12526
12527 /* Look for a likely section. We probably won't even be
12528 using TOCstart. */
12529 for (s = obfd->sections; s != NULL; s = s->next)
12530 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12531 | SEC_EXCLUDE))
12532 == (SEC_ALLOC | SEC_SMALL_DATA))
12533 break;
12534 if (s == NULL)
12535 for (s = obfd->sections; s != NULL; s = s->next)
12536 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12537 == (SEC_ALLOC | SEC_SMALL_DATA))
12538 break;
12539 if (s == NULL)
12540 for (s = obfd->sections; s != NULL; s = s->next)
12541 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12542 == SEC_ALLOC)
12543 break;
12544 if (s == NULL)
12545 for (s = obfd->sections; s != NULL; s = s->next)
12546 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12547 break;
12548 }
12549
12550 TOCstart = 0;
12551 if (s != NULL)
12552 TOCstart = s->output_section->vma + s->output_offset;
12553
12554 _bfd_set_gp_value (obfd, TOCstart);
12555
12556 if (info != NULL && s != NULL)
12557 {
12558 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12559
12560 if (htab != NULL)
12561 {
12562 if (htab->elf.hgot != NULL)
12563 {
12564 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12565 htab->elf.hgot->root.u.def.section = s;
12566 }
12567 }
12568 else
12569 {
12570 struct bfd_link_hash_entry *bh = NULL;
12571 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12572 s, TOC_BASE_OFF, NULL, FALSE,
12573 FALSE, &bh);
12574 }
12575 }
12576 return TOCstart;
12577}
12578
12579/* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12580 write out any global entry stubs. */
12581
12582static bfd_boolean
12583build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12584{
12585 struct bfd_link_info *info;
12586 struct ppc_link_hash_table *htab;
12587 struct plt_entry *pent;
12588 asection *s;
12589
12590 if (h->root.type == bfd_link_hash_indirect)
12591 return TRUE;
12592
12593 if (!h->pointer_equality_needed)
12594 return TRUE;
12595
12596 if (h->def_regular)
12597 return TRUE;
12598
12599 info = inf;
12600 htab = ppc_hash_table (info);
12601 if (htab == NULL)
12602 return FALSE;
12603
12604 s = htab->glink;
12605 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12606 if (pent->plt.offset != (bfd_vma) -1
12607 && pent->addend == 0)
12608 {
12609 bfd_byte *p;
12610 asection *plt;
12611 bfd_vma off;
12612
12613 p = s->contents + h->root.u.def.value;
12614 plt = htab->elf.splt;
12615 if (!htab->elf.dynamic_sections_created
12616 || h->dynindx == -1)
12617 plt = htab->elf.iplt;
12618 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12619 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12620
12621 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12622 {
12623 info->callbacks->einfo
12624 (_("%P: linkage table error against `%T'\n"),
12625 h->root.root.string);
12626 bfd_set_error (bfd_error_bad_value);
12627 htab->stub_error = TRUE;
12628 }
12629
12630 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12631 if (htab->params->emit_stub_syms)
12632 {
12633 size_t len = strlen (h->root.root.string);
12634 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12635
12636 if (name == NULL)
12637 return FALSE;
12638
12639 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12640 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12641 if (h == NULL)
12642 return FALSE;
12643 if (h->root.type == bfd_link_hash_new)
12644 {
12645 h->root.type = bfd_link_hash_defined;
12646 h->root.u.def.section = s;
12647 h->root.u.def.value = p - s->contents;
12648 h->ref_regular = 1;
12649 h->def_regular = 1;
12650 h->ref_regular_nonweak = 1;
12651 h->forced_local = 1;
12652 h->non_elf = 0;
12653 }
12654 }
12655
12656 if (PPC_HA (off) != 0)
12657 {
12658 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12659 p += 4;
12660 }
12661 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12662 p += 4;
12663 bfd_put_32 (s->owner, MTCTR_R12, p);
12664 p += 4;
12665 bfd_put_32 (s->owner, BCTR, p);
12666 break;
12667 }
12668 return TRUE;
12669}
12670
12671/* Build all the stubs associated with the current output file.
12672 The stubs are kept in a hash table attached to the main linker
12673 hash table. This function is called via gldelf64ppc_finish. */
12674
12675bfd_boolean
12676ppc64_elf_build_stubs (struct bfd_link_info *info,
12677 char **stats)
12678{
12679 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12680 asection *stub_sec;
12681 bfd_byte *p;
12682 int stub_sec_count = 0;
12683
12684 if (htab == NULL)
12685 return FALSE;
12686
12687 /* Allocate memory to hold the linker stubs. */
12688 for (stub_sec = htab->params->stub_bfd->sections;
12689 stub_sec != NULL;
12690 stub_sec = stub_sec->next)
12691 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12692 && stub_sec->size != 0)
12693 {
12694 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12695 if (stub_sec->contents == NULL)
12696 return FALSE;
12697 /* We want to check that built size is the same as calculated
12698 size. rawsize is a convenient location to use. */
12699 stub_sec->rawsize = stub_sec->size;
12700 stub_sec->size = 0;
12701 }
12702
12703 if (htab->glink != NULL && htab->glink->size != 0)
12704 {
12705 unsigned int indx;
12706 bfd_vma plt0;
12707
12708 /* Build the .glink plt call stub. */
12709 if (htab->params->emit_stub_syms)
12710 {
12711 struct elf_link_hash_entry *h;
12712 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12713 TRUE, FALSE, FALSE);
12714 if (h == NULL)
12715 return FALSE;
12716 if (h->root.type == bfd_link_hash_new)
12717 {
12718 h->root.type = bfd_link_hash_defined;
12719 h->root.u.def.section = htab->glink;
12720 h->root.u.def.value = 8;
12721 h->ref_regular = 1;
12722 h->def_regular = 1;
12723 h->ref_regular_nonweak = 1;
12724 h->forced_local = 1;
12725 h->non_elf = 0;
12726 }
12727 }
12728 plt0 = (htab->elf.splt->output_section->vma
12729 + htab->elf.splt->output_offset
12730 - 16);
12731 if (info->emitrelocations)
12732 {
12733 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12734 if (r == NULL)
12735 return FALSE;
12736 r->r_offset = (htab->glink->output_offset
12737 + htab->glink->output_section->vma);
12738 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12739 r->r_addend = plt0;
12740 }
12741 p = htab->glink->contents;
12742 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12743 bfd_put_64 (htab->glink->owner, plt0, p);
12744 p += 8;
12745 if (htab->opd_abi)
12746 {
12747 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12748 p += 4;
12749 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12750 p += 4;
12751 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12752 p += 4;
12753 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12754 p += 4;
12755 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12756 p += 4;
12757 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12758 p += 4;
12759 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12760 p += 4;
12761 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12762 p += 4;
12763 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12764 p += 4;
12765 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12766 p += 4;
12767 }
12768 else
12769 {
12770 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12771 p += 4;
12772 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12773 p += 4;
12774 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12775 p += 4;
12776 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12777 p += 4;
12778 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12779 p += 4;
12780 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12781 p += 4;
12782 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12783 p += 4;
12784 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12785 p += 4;
12786 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12787 p += 4;
12788 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12789 p += 4;
12790 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12791 p += 4;
12792 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12793 p += 4;
12794 }
12795 bfd_put_32 (htab->glink->owner, BCTR, p);
12796 p += 4;
12797 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12798 {
12799 bfd_put_32 (htab->glink->owner, NOP, p);
12800 p += 4;
12801 }
12802
12803 /* Build the .glink lazy link call stubs. */
12804 indx = 0;
12805 while (p < htab->glink->contents + htab->glink->rawsize)
12806 {
12807 if (htab->opd_abi)
12808 {
12809 if (indx < 0x8000)
12810 {
12811 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12812 p += 4;
12813 }
12814 else
12815 {
12816 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12817 p += 4;
12818 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12819 p);
12820 p += 4;
12821 }
12822 }
12823 bfd_put_32 (htab->glink->owner,
12824 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12825 indx++;
12826 p += 4;
12827 }
12828
12829 /* Build .glink global entry stubs. */
12830 if (htab->glink->size > htab->glink->rawsize)
12831 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12832 }
12833
12834 if (htab->brlt != NULL && htab->brlt->size != 0)
12835 {
12836 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12837 htab->brlt->size);
12838 if (htab->brlt->contents == NULL)
12839 return FALSE;
12840 }
12841 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12842 {
12843 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12844 htab->relbrlt->size);
12845 if (htab->relbrlt->contents == NULL)
12846 return FALSE;
12847 }
12848
12849 /* Build the stubs as directed by the stub hash table. */
12850 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12851
12852 if (htab->relbrlt != NULL)
12853 htab->relbrlt->reloc_count = 0;
12854
12855 if (htab->params->plt_stub_align != 0)
12856 for (stub_sec = htab->params->stub_bfd->sections;
12857 stub_sec != NULL;
12858 stub_sec = stub_sec->next)
12859 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12860 stub_sec->size = ((stub_sec->size
12861 + (1 << htab->params->plt_stub_align) - 1)
12862 & (-1 << htab->params->plt_stub_align));
12863
12864 for (stub_sec = htab->params->stub_bfd->sections;
12865 stub_sec != NULL;
12866 stub_sec = stub_sec->next)
12867 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12868 {
12869 stub_sec_count += 1;
12870 if (stub_sec->rawsize != stub_sec->size)
12871 break;
12872 }
12873
12874 /* Note that the glink_eh_frame check here is not only testing that
12875 the generated size matched the calculated size but also that
12876 bfd_elf_discard_info didn't make any changes to the section. */
12877 if (stub_sec != NULL
12878 || (htab->glink_eh_frame != NULL
12879 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12880 {
12881 htab->stub_error = TRUE;
12882 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12883 }
12884
12885 if (htab->stub_error)
12886 return FALSE;
12887
12888 if (stats != NULL)
12889 {
12890 *stats = bfd_malloc (500);
12891 if (*stats == NULL)
12892 return FALSE;
12893
12894 sprintf (*stats, _("linker stubs in %u group%s\n"
12895 " branch %lu\n"
12896 " toc adjust %lu\n"
12897 " long branch %lu\n"
12898 " long toc adj %lu\n"
12899 " plt call %lu\n"
12900 " plt call toc %lu\n"
12901 " global entry %lu"),
12902 stub_sec_count,
12903 stub_sec_count == 1 ? "" : "s",
12904 htab->stub_count[ppc_stub_long_branch - 1],
12905 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12906 htab->stub_count[ppc_stub_plt_branch - 1],
12907 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12908 htab->stub_count[ppc_stub_plt_call - 1],
12909 htab->stub_count[ppc_stub_plt_call_r2save - 1],
12910 htab->stub_count[ppc_stub_global_entry - 1]);
12911 }
12912 return TRUE;
12913}
12914
12915/* This function undoes the changes made by add_symbol_adjust. */
12916
12917static bfd_boolean
12918undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12919{
12920 struct ppc_link_hash_entry *eh;
12921
12922 if (h->root.type == bfd_link_hash_indirect)
12923 return TRUE;
12924
12925 eh = (struct ppc_link_hash_entry *) h;
12926 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12927 return TRUE;
12928
12929 eh->elf.root.type = bfd_link_hash_undefined;
12930 return TRUE;
12931}
12932
12933void
12934ppc64_elf_restore_symbols (struct bfd_link_info *info)
12935{
12936 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12937
12938 if (htab != NULL)
12939 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12940}
12941
12942/* What to do when ld finds relocations against symbols defined in
12943 discarded sections. */
12944
12945static unsigned int
12946ppc64_elf_action_discarded (asection *sec)
12947{
12948 if (strcmp (".opd", sec->name) == 0)
12949 return 0;
12950
12951 if (strcmp (".toc", sec->name) == 0)
12952 return 0;
12953
12954 if (strcmp (".toc1", sec->name) == 0)
12955 return 0;
12956
12957 return _bfd_elf_default_action_discarded (sec);
12958}
12959
12960/* The RELOCATE_SECTION function is called by the ELF backend linker
12961 to handle the relocations for a section.
12962
12963 The relocs are always passed as Rela structures; if the section
12964 actually uses Rel structures, the r_addend field will always be
12965 zero.
12966
12967 This function is responsible for adjust the section contents as
12968 necessary, and (if using Rela relocs and generating a
12969 relocatable output file) adjusting the reloc addend as
12970 necessary.
12971
12972 This function does not have to worry about setting the reloc
12973 address or the reloc symbol index.
12974
12975 LOCAL_SYMS is a pointer to the swapped in local symbols.
12976
12977 LOCAL_SECTIONS is an array giving the section in the input file
12978 corresponding to the st_shndx field of each local symbol.
12979
12980 The global hash table entry for the global symbols can be found
12981 via elf_sym_hashes (input_bfd).
12982
12983 When generating relocatable output, this function must handle
12984 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12985 going to be the section symbol corresponding to the output
12986 section, which means that the addend must be adjusted
12987 accordingly. */
12988
12989static bfd_boolean
12990ppc64_elf_relocate_section (bfd *output_bfd,
12991 struct bfd_link_info *info,
12992 bfd *input_bfd,
12993 asection *input_section,
12994 bfd_byte *contents,
12995 Elf_Internal_Rela *relocs,
12996 Elf_Internal_Sym *local_syms,
12997 asection **local_sections)
12998{
12999 struct ppc_link_hash_table *htab;
13000 Elf_Internal_Shdr *symtab_hdr;
13001 struct elf_link_hash_entry **sym_hashes;
13002 Elf_Internal_Rela *rel;
13003 Elf_Internal_Rela *relend;
13004 Elf_Internal_Rela outrel;
13005 bfd_byte *loc;
13006 struct got_entry **local_got_ents;
13007 bfd_vma TOCstart;
13008 bfd_boolean ret = TRUE;
13009 bfd_boolean is_opd;
13010 /* Assume 'at' branch hints. */
13011 bfd_boolean is_isa_v2 = TRUE;
13012 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
13013
13014 /* Initialize howto table if needed. */
13015 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13016 ppc_howto_init ();
13017
13018 htab = ppc_hash_table (info);
13019 if (htab == NULL)
13020 return FALSE;
13021
13022 /* Don't relocate stub sections. */
13023 if (input_section->owner == htab->params->stub_bfd)
13024 return TRUE;
13025
13026 BFD_ASSERT (is_ppc64_elf (input_bfd));
13027
13028 local_got_ents = elf_local_got_ents (input_bfd);
13029 TOCstart = elf_gp (output_bfd);
13030 symtab_hdr = &elf_symtab_hdr (input_bfd);
13031 sym_hashes = elf_sym_hashes (input_bfd);
13032 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13033
13034 rel = relocs;
13035 relend = relocs + input_section->reloc_count;
13036 for (; rel < relend; rel++)
13037 {
13038 enum elf_ppc64_reloc_type r_type;
13039 bfd_vma addend;
13040 bfd_reloc_status_type r;
13041 Elf_Internal_Sym *sym;
13042 asection *sec;
13043 struct elf_link_hash_entry *h_elf;
13044 struct ppc_link_hash_entry *h;
13045 struct ppc_link_hash_entry *fdh;
13046 const char *sym_name;
13047 unsigned long r_symndx, toc_symndx;
13048 bfd_vma toc_addend;
13049 unsigned char tls_mask, tls_gd, tls_type;
13050 unsigned char sym_type;
13051 bfd_vma relocation;
13052 bfd_boolean unresolved_reloc;
13053 bfd_boolean warned;
13054 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13055 unsigned int insn;
13056 unsigned int mask;
13057 struct ppc_stub_hash_entry *stub_entry;
13058 bfd_vma max_br_offset;
13059 bfd_vma from;
13060 const Elf_Internal_Rela orig_rel = *rel;
13061 reloc_howto_type *howto;
13062 struct reloc_howto_struct alt_howto;
13063
13064 r_type = ELF64_R_TYPE (rel->r_info);
13065 r_symndx = ELF64_R_SYM (rel->r_info);
13066
13067 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13068 symbol of the previous ADDR64 reloc. The symbol gives us the
13069 proper TOC base to use. */
13070 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13071 && rel != relocs
13072 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
13073 && is_opd)
13074 r_symndx = ELF64_R_SYM (rel[-1].r_info);
13075
13076 sym = NULL;
13077 sec = NULL;
13078 h_elf = NULL;
13079 sym_name = NULL;
13080 unresolved_reloc = FALSE;
13081 warned = FALSE;
13082
13083 if (r_symndx < symtab_hdr->sh_info)
13084 {
13085 /* It's a local symbol. */
13086 struct _opd_sec_data *opd;
13087
13088 sym = local_syms + r_symndx;
13089 sec = local_sections[r_symndx];
13090 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13091 sym_type = ELF64_ST_TYPE (sym->st_info);
13092 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13093 opd = get_opd_info (sec);
13094 if (opd != NULL && opd->adjust != NULL)
13095 {
13096 long adjust = opd->adjust[OPD_NDX (sym->st_value
13097 + rel->r_addend)];
13098 if (adjust == -1)
13099 relocation = 0;
13100 else
13101 {
13102 /* If this is a relocation against the opd section sym
13103 and we have edited .opd, adjust the reloc addend so
13104 that ld -r and ld --emit-relocs output is correct.
13105 If it is a reloc against some other .opd symbol,
13106 then the symbol value will be adjusted later. */
13107 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13108 rel->r_addend += adjust;
13109 else
13110 relocation += adjust;
13111 }
13112 }
13113 }
13114 else
13115 {
13116 bfd_boolean ignored;
13117
13118 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13119 r_symndx, symtab_hdr, sym_hashes,
13120 h_elf, sec, relocation,
13121 unresolved_reloc, warned, ignored);
13122 sym_name = h_elf->root.root.string;
13123 sym_type = h_elf->type;
13124 if (sec != NULL
13125 && sec->owner == output_bfd
13126 && strcmp (sec->name, ".opd") == 0)
13127 {
13128 /* This is a symbol defined in a linker script. All
13129 such are defined in output sections, even those
13130 defined by simple assignment from a symbol defined in
13131 an input section. Transfer the symbol to an
13132 appropriate input .opd section, so that a branch to
13133 this symbol will be mapped to the location specified
13134 by the opd entry. */
13135 struct bfd_link_order *lo;
13136 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13137 if (lo->type == bfd_indirect_link_order)
13138 {
13139 asection *isec = lo->u.indirect.section;
13140 if (h_elf->root.u.def.value >= isec->output_offset
13141 && h_elf->root.u.def.value < (isec->output_offset
13142 + isec->size))
13143 {
13144 h_elf->root.u.def.value -= isec->output_offset;
13145 h_elf->root.u.def.section = isec;
13146 sec = isec;
13147 break;
13148 }
13149 }
13150 }
13151 }
13152 h = (struct ppc_link_hash_entry *) h_elf;
13153
13154 if (sec != NULL && discarded_section (sec))
13155 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13156 rel, 1, relend,
13157 ppc64_elf_howto_table[r_type], 0,
13158 contents);
13159
13160 if (info->relocatable)
13161 continue;
13162
13163 if (h != NULL && &h->elf == htab->elf.hgot)
13164 {
13165 relocation = (TOCstart
13166 + htab->stub_group[input_section->id].toc_off);
13167 sec = bfd_abs_section_ptr;
13168 unresolved_reloc = FALSE;
13169 }
13170
13171 /* TLS optimizations. Replace instruction sequences and relocs
13172 based on information we collected in tls_optimize. We edit
13173 RELOCS so that --emit-relocs will output something sensible
13174 for the final instruction stream. */
13175 tls_mask = 0;
13176 tls_gd = 0;
13177 toc_symndx = 0;
13178 if (h != NULL)
13179 tls_mask = h->tls_mask;
13180 else if (local_got_ents != NULL)
13181 {
13182 struct plt_entry **local_plt = (struct plt_entry **)
13183 (local_got_ents + symtab_hdr->sh_info);
13184 unsigned char *lgot_masks = (unsigned char *)
13185 (local_plt + symtab_hdr->sh_info);
13186 tls_mask = lgot_masks[r_symndx];
13187 }
13188 if (tls_mask == 0
13189 && (r_type == R_PPC64_TLS
13190 || r_type == R_PPC64_TLSGD
13191 || r_type == R_PPC64_TLSLD))
13192 {
13193 /* Check for toc tls entries. */
13194 unsigned char *toc_tls;
13195
13196 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13197 &local_syms, rel, input_bfd))
13198 return FALSE;
13199
13200 if (toc_tls)
13201 tls_mask = *toc_tls;
13202 }
13203
13204 /* Check that tls relocs are used with tls syms, and non-tls
13205 relocs are used with non-tls syms. */
13206 if (r_symndx != STN_UNDEF
13207 && r_type != R_PPC64_NONE
13208 && (h == NULL
13209 || h->elf.root.type == bfd_link_hash_defined
13210 || h->elf.root.type == bfd_link_hash_defweak)
13211 && (IS_PPC64_TLS_RELOC (r_type)
13212 != (sym_type == STT_TLS
13213 || (sym_type == STT_SECTION
13214 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13215 {
13216 if (tls_mask != 0
13217 && (r_type == R_PPC64_TLS
13218 || r_type == R_PPC64_TLSGD
13219 || r_type == R_PPC64_TLSLD))
13220 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13221 ;
13222 else
13223 info->callbacks->einfo
13224 (!IS_PPC64_TLS_RELOC (r_type)
13225 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13226 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13227 input_bfd, input_section, rel->r_offset,
13228 ppc64_elf_howto_table[r_type]->name,
13229 sym_name);
13230 }
13231
13232 /* Ensure reloc mapping code below stays sane. */
13233 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13234 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13235 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13236 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13237 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13238 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13239 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13240 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13241 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13242 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13243 abort ();
13244
13245 switch (r_type)
13246 {
13247 default:
13248 break;
13249
13250 case R_PPC64_LO_DS_OPT:
13251 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13252 if ((insn & (0x3f << 26)) != 58u << 26)
13253 abort ();
13254 insn += (14u << 26) - (58u << 26);
13255 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13256 r_type = R_PPC64_TOC16_LO;
13257 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13258 break;
13259
13260 case R_PPC64_TOC16:
13261 case R_PPC64_TOC16_LO:
13262 case R_PPC64_TOC16_DS:
13263 case R_PPC64_TOC16_LO_DS:
13264 {
13265 /* Check for toc tls entries. */
13266 unsigned char *toc_tls;
13267 int retval;
13268
13269 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13270 &local_syms, rel, input_bfd);
13271 if (retval == 0)
13272 return FALSE;
13273
13274 if (toc_tls)
13275 {
13276 tls_mask = *toc_tls;
13277 if (r_type == R_PPC64_TOC16_DS
13278 || r_type == R_PPC64_TOC16_LO_DS)
13279 {
13280 if (tls_mask != 0
13281 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13282 goto toctprel;
13283 }
13284 else
13285 {
13286 /* If we found a GD reloc pair, then we might be
13287 doing a GD->IE transition. */
13288 if (retval == 2)
13289 {
13290 tls_gd = TLS_TPRELGD;
13291 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13292 goto tls_ldgd_opt;
13293 }
13294 else if (retval == 3)
13295 {
13296 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13297 goto tls_ldgd_opt;
13298 }
13299 }
13300 }
13301 }
13302 break;
13303
13304 case R_PPC64_GOT_TPREL16_HI:
13305 case R_PPC64_GOT_TPREL16_HA:
13306 if (tls_mask != 0
13307 && (tls_mask & TLS_TPREL) == 0)
13308 {
13309 rel->r_offset -= d_offset;
13310 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13311 r_type = R_PPC64_NONE;
13312 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13313 }
13314 break;
13315
13316 case R_PPC64_GOT_TPREL16_DS:
13317 case R_PPC64_GOT_TPREL16_LO_DS:
13318 if (tls_mask != 0
13319 && (tls_mask & TLS_TPREL) == 0)
13320 {
13321 toctprel:
13322 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13323 insn &= 31 << 21;
13324 insn |= 0x3c0d0000; /* addis 0,13,0 */
13325 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13326 r_type = R_PPC64_TPREL16_HA;
13327 if (toc_symndx != 0)
13328 {
13329 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13330 rel->r_addend = toc_addend;
13331 /* We changed the symbol. Start over in order to
13332 get h, sym, sec etc. right. */
13333 rel--;
13334 continue;
13335 }
13336 else
13337 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13338 }
13339 break;
13340
13341 case R_PPC64_TLS:
13342 if (tls_mask != 0
13343 && (tls_mask & TLS_TPREL) == 0)
13344 {
13345 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13346 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13347 if (insn == 0)
13348 abort ();
13349 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13350 /* Was PPC64_TLS which sits on insn boundary, now
13351 PPC64_TPREL16_LO which is at low-order half-word. */
13352 rel->r_offset += d_offset;
13353 r_type = R_PPC64_TPREL16_LO;
13354 if (toc_symndx != 0)
13355 {
13356 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13357 rel->r_addend = toc_addend;
13358 /* We changed the symbol. Start over in order to
13359 get h, sym, sec etc. right. */
13360 rel--;
13361 continue;
13362 }
13363 else
13364 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13365 }
13366 break;
13367
13368 case R_PPC64_GOT_TLSGD16_HI:
13369 case R_PPC64_GOT_TLSGD16_HA:
13370 tls_gd = TLS_TPRELGD;
13371 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13372 goto tls_gdld_hi;
13373 break;
13374
13375 case R_PPC64_GOT_TLSLD16_HI:
13376 case R_PPC64_GOT_TLSLD16_HA:
13377 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13378 {
13379 tls_gdld_hi:
13380 if ((tls_mask & tls_gd) != 0)
13381 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13382 + R_PPC64_GOT_TPREL16_DS);
13383 else
13384 {
13385 rel->r_offset -= d_offset;
13386 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13387 r_type = R_PPC64_NONE;
13388 }
13389 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13390 }
13391 break;
13392
13393 case R_PPC64_GOT_TLSGD16:
13394 case R_PPC64_GOT_TLSGD16_LO:
13395 tls_gd = TLS_TPRELGD;
13396 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13397 goto tls_ldgd_opt;
13398 break;
13399
13400 case R_PPC64_GOT_TLSLD16:
13401 case R_PPC64_GOT_TLSLD16_LO:
13402 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13403 {
13404 unsigned int insn1, insn2, insn3;
13405 bfd_vma offset;
13406
13407 tls_ldgd_opt:
13408 offset = (bfd_vma) -1;
13409 /* If not using the newer R_PPC64_TLSGD/LD to mark
13410 __tls_get_addr calls, we must trust that the call
13411 stays with its arg setup insns, ie. that the next
13412 reloc is the __tls_get_addr call associated with
13413 the current reloc. Edit both insns. */
13414 if (input_section->has_tls_get_addr_call
13415 && rel + 1 < relend
13416 && branch_reloc_hash_match (input_bfd, rel + 1,
13417 htab->tls_get_addr,
13418 htab->tls_get_addr_fd))
13419 offset = rel[1].r_offset;
13420 /* We read the low GOT_TLS (or TOC16) insn because we
13421 need to keep the destination reg. It may be
13422 something other than the usual r3, and moved to r3
13423 before the call by intervening code. */
13424 insn1 = bfd_get_32 (output_bfd,
13425 contents + rel->r_offset - d_offset);
13426 if ((tls_mask & tls_gd) != 0)
13427 {
13428 /* IE */
13429 insn1 &= (0x1f << 21) | (0x1f << 16);
13430 insn1 |= 58 << 26; /* ld */
13431 insn2 = 0x7c636a14; /* add 3,3,13 */
13432 if (offset != (bfd_vma) -1)
13433 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13434 if ((tls_mask & TLS_EXPLICIT) == 0)
13435 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13436 + R_PPC64_GOT_TPREL16_DS);
13437 else
13438 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13439 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13440 }
13441 else
13442 {
13443 /* LE */
13444 insn1 &= 0x1f << 21;
13445 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13446 insn2 = 0x38630000; /* addi 3,3,0 */
13447 if (tls_gd == 0)
13448 {
13449 /* Was an LD reloc. */
13450 if (toc_symndx)
13451 sec = local_sections[toc_symndx];
13452 for (r_symndx = 0;
13453 r_symndx < symtab_hdr->sh_info;
13454 r_symndx++)
13455 if (local_sections[r_symndx] == sec)
13456 break;
13457 if (r_symndx >= symtab_hdr->sh_info)
13458 r_symndx = STN_UNDEF;
13459 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13460 if (r_symndx != STN_UNDEF)
13461 rel->r_addend -= (local_syms[r_symndx].st_value
13462 + sec->output_offset
13463 + sec->output_section->vma);
13464 }
13465 else if (toc_symndx != 0)
13466 {
13467 r_symndx = toc_symndx;
13468 rel->r_addend = toc_addend;
13469 }
13470 r_type = R_PPC64_TPREL16_HA;
13471 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13472 if (offset != (bfd_vma) -1)
13473 {
13474 rel[1].r_info = ELF64_R_INFO (r_symndx,
13475 R_PPC64_TPREL16_LO);
13476 rel[1].r_offset = offset + d_offset;
13477 rel[1].r_addend = rel->r_addend;
13478 }
13479 }
13480 bfd_put_32 (output_bfd, insn1,
13481 contents + rel->r_offset - d_offset);
13482 if (offset != (bfd_vma) -1)
13483 {
13484 insn3 = bfd_get_32 (output_bfd,
13485 contents + offset + 4);
13486 if (insn3 == NOP
13487 || insn3 == CROR_151515 || insn3 == CROR_313131)
13488 {
13489 rel[1].r_offset += 4;
13490 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13491 insn2 = NOP;
13492 }
13493 bfd_put_32 (output_bfd, insn2, contents + offset);
13494 }
13495 if ((tls_mask & tls_gd) == 0
13496 && (tls_gd == 0 || toc_symndx != 0))
13497 {
13498 /* We changed the symbol. Start over in order
13499 to get h, sym, sec etc. right. */
13500 rel--;
13501 continue;
13502 }
13503 }
13504 break;
13505
13506 case R_PPC64_TLSGD:
13507 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13508 {
13509 unsigned int insn2, insn3;
13510 bfd_vma offset = rel->r_offset;
13511
13512 if ((tls_mask & TLS_TPRELGD) != 0)
13513 {
13514 /* IE */
13515 r_type = R_PPC64_NONE;
13516 insn2 = 0x7c636a14; /* add 3,3,13 */
13517 }
13518 else
13519 {
13520 /* LE */
13521 if (toc_symndx != 0)
13522 {
13523 r_symndx = toc_symndx;
13524 rel->r_addend = toc_addend;
13525 }
13526 r_type = R_PPC64_TPREL16_LO;
13527 rel->r_offset = offset + d_offset;
13528 insn2 = 0x38630000; /* addi 3,3,0 */
13529 }
13530 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13531 /* Zap the reloc on the _tls_get_addr call too. */
13532 BFD_ASSERT (offset == rel[1].r_offset);
13533 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13534 insn3 = bfd_get_32 (output_bfd,
13535 contents + offset + 4);
13536 if (insn3 == NOP
13537 || insn3 == CROR_151515 || insn3 == CROR_313131)
13538 {
13539 rel->r_offset += 4;
13540 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13541 insn2 = NOP;
13542 }
13543 bfd_put_32 (output_bfd, insn2, contents + offset);
13544 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13545 {
13546 rel--;
13547 continue;
13548 }
13549 }
13550 break;
13551
13552 case R_PPC64_TLSLD:
13553 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13554 {
13555 unsigned int insn2, insn3;
13556 bfd_vma offset = rel->r_offset;
13557
13558 if (toc_symndx)
13559 sec = local_sections[toc_symndx];
13560 for (r_symndx = 0;
13561 r_symndx < symtab_hdr->sh_info;
13562 r_symndx++)
13563 if (local_sections[r_symndx] == sec)
13564 break;
13565 if (r_symndx >= symtab_hdr->sh_info)
13566 r_symndx = STN_UNDEF;
13567 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13568 if (r_symndx != STN_UNDEF)
13569 rel->r_addend -= (local_syms[r_symndx].st_value
13570 + sec->output_offset
13571 + sec->output_section->vma);
13572
13573 r_type = R_PPC64_TPREL16_LO;
13574 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13575 rel->r_offset = offset + d_offset;
13576 /* Zap the reloc on the _tls_get_addr call too. */
13577 BFD_ASSERT (offset == rel[1].r_offset);
13578 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13579 insn2 = 0x38630000; /* addi 3,3,0 */
13580 insn3 = bfd_get_32 (output_bfd,
13581 contents + offset + 4);
13582 if (insn3 == NOP
13583 || insn3 == CROR_151515 || insn3 == CROR_313131)
13584 {
13585 rel->r_offset += 4;
13586 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13587 insn2 = NOP;
13588 }
13589 bfd_put_32 (output_bfd, insn2, contents + offset);
13590 rel--;
13591 continue;
13592 }
13593 break;
13594
13595 case R_PPC64_DTPMOD64:
13596 if (rel + 1 < relend
13597 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13598 && rel[1].r_offset == rel->r_offset + 8)
13599 {
13600 if ((tls_mask & TLS_GD) == 0)
13601 {
13602 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13603 if ((tls_mask & TLS_TPRELGD) != 0)
13604 r_type = R_PPC64_TPREL64;
13605 else
13606 {
13607 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13608 r_type = R_PPC64_NONE;
13609 }
13610 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13611 }
13612 }
13613 else
13614 {
13615 if ((tls_mask & TLS_LD) == 0)
13616 {
13617 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13618 r_type = R_PPC64_NONE;
13619 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13620 }
13621 }
13622 break;
13623
13624 case R_PPC64_TPREL64:
13625 if ((tls_mask & TLS_TPREL) == 0)
13626 {
13627 r_type = R_PPC64_NONE;
13628 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13629 }
13630 break;
13631
13632 case R_PPC64_REL16_HA:
13633 /* If we are generating a non-PIC executable, edit
13634 . 0: addis 2,12,.TOC.-0b@ha
13635 . addi 2,2,.TOC.-0b@l
13636 used by ELFv2 global entry points to set up r2, to
13637 . lis 2,.TOC.@ha
13638 . addi 2,2,.TOC.@l
13639 if .TOC. is in range. */
13640 if (!info->shared
13641 && !info->traditional_format
13642 && h != NULL && &h->elf == htab->elf.hgot
13643 && rel + 1 < relend
13644 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13645 && rel[1].r_offset == rel->r_offset + 4
13646 && rel[1].r_addend == rel->r_addend + 4
13647 && relocation + 0x80008000 <= 0xffffffff)
13648 {
13649 unsigned int insn1, insn2;
13650 bfd_vma offset = rel->r_offset - d_offset;
13651 insn1 = bfd_get_32 (output_bfd, contents + offset);
13652 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13653 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13654 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13655 {
13656 r_type = R_PPC64_ADDR16_HA;
13657 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13658 rel->r_addend -= d_offset;
13659 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13660 rel[1].r_addend -= d_offset + 4;
13661 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13662 }
13663 }
13664 break;
13665 }
13666
13667 /* Handle other relocations that tweak non-addend part of insn. */
13668 insn = 0;
13669 max_br_offset = 1 << 25;
13670 addend = rel->r_addend;
13671 reloc_dest = DEST_NORMAL;
13672 switch (r_type)
13673 {
13674 default:
13675 break;
13676
13677 case R_PPC64_TOCSAVE:
13678 if (relocation + addend == (rel->r_offset
13679 + input_section->output_offset
13680 + input_section->output_section->vma)
13681 && tocsave_find (htab, NO_INSERT,
13682 &local_syms, rel, input_bfd))
13683 {
13684 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13685 if (insn == NOP
13686 || insn == CROR_151515 || insn == CROR_313131)
13687 bfd_put_32 (input_bfd,
13688 STD_R2_0R1 + STK_TOC (htab),
13689 contents + rel->r_offset);
13690 }
13691 break;
13692
13693 /* Branch taken prediction relocations. */
13694 case R_PPC64_ADDR14_BRTAKEN:
13695 case R_PPC64_REL14_BRTAKEN:
13696 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13697 /* Fall thru. */
13698
13699 /* Branch not taken prediction relocations. */
13700 case R_PPC64_ADDR14_BRNTAKEN:
13701 case R_PPC64_REL14_BRNTAKEN:
13702 insn |= bfd_get_32 (output_bfd,
13703 contents + rel->r_offset) & ~(0x01 << 21);
13704 /* Fall thru. */
13705
13706 case R_PPC64_REL14:
13707 max_br_offset = 1 << 15;
13708 /* Fall thru. */
13709
13710 case R_PPC64_REL24:
13711 /* Calls to functions with a different TOC, such as calls to
13712 shared objects, need to alter the TOC pointer. This is
13713 done using a linkage stub. A REL24 branching to these
13714 linkage stubs needs to be followed by a nop, as the nop
13715 will be replaced with an instruction to restore the TOC
13716 base pointer. */
13717 fdh = h;
13718 if (h != NULL
13719 && h->oh != NULL
13720 && h->oh->is_func_descriptor)
13721 fdh = ppc_follow_link (h->oh);
13722 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13723 htab);
13724 if (stub_entry != NULL
13725 && (stub_entry->stub_type == ppc_stub_plt_call
13726 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13727 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13728 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13729 {
13730 bfd_boolean can_plt_call = FALSE;
13731
13732 /* All of these stubs will modify r2, so there must be a
13733 branch and link followed by a nop. The nop is
13734 replaced by an insn to restore r2. */
13735 if (rel->r_offset + 8 <= input_section->size)
13736 {
13737 unsigned long br;
13738
13739 br = bfd_get_32 (input_bfd,
13740 contents + rel->r_offset);
13741 if ((br & 1) != 0)
13742 {
13743 unsigned long nop;
13744
13745 nop = bfd_get_32 (input_bfd,
13746 contents + rel->r_offset + 4);
13747 if (nop == NOP
13748 || nop == CROR_151515 || nop == CROR_313131)
13749 {
13750 if (h != NULL
13751 && (h == htab->tls_get_addr_fd
13752 || h == htab->tls_get_addr)
13753 && !htab->params->no_tls_get_addr_opt)
13754 {
13755 /* Special stub used, leave nop alone. */
13756 }
13757 else
13758 bfd_put_32 (input_bfd,
13759 LD_R2_0R1 + STK_TOC (htab),
13760 contents + rel->r_offset + 4);
13761 can_plt_call = TRUE;
13762 }
13763 }
13764 }
13765
13766 if (!can_plt_call && h != NULL)
13767 {
13768 const char *name = h->elf.root.root.string;
13769
13770 if (*name == '.')
13771 ++name;
13772
13773 if (strncmp (name, "__libc_start_main", 17) == 0
13774 && (name[17] == 0 || name[17] == '@'))
13775 {
13776 /* Allow crt1 branch to go via a toc adjusting
13777 stub. Other calls that never return could do
13778 the same, if we could detect such. */
13779 can_plt_call = TRUE;
13780 }
13781 }
13782
13783 if (!can_plt_call)
13784 {
13785 /* g++ as of 20130507 emits self-calls without a
13786 following nop. This is arguably wrong since we
13787 have conflicting information. On the one hand a
13788 global symbol and on the other a local call
13789 sequence, but don't error for this special case.
13790 It isn't possible to cheaply verify we have
13791 exactly such a call. Allow all calls to the same
13792 section. */
13793 asection *code_sec = sec;
13794
13795 if (get_opd_info (sec) != NULL)
13796 {
13797 bfd_vma off = (relocation + addend
13798 - sec->output_section->vma
13799 - sec->output_offset);
13800
13801 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13802 }
13803 if (code_sec == input_section)
13804 can_plt_call = TRUE;
13805 }
13806
13807 if (!can_plt_call)
13808 {
13809 if (stub_entry->stub_type == ppc_stub_plt_call
13810 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13811 info->callbacks->einfo
13812 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13813 "recompile with -fPIC\n"),
13814 input_bfd, input_section, rel->r_offset, sym_name);
13815 else
13816 info->callbacks->einfo
13817 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13818 "(-mcmodel=small toc adjust stub)\n"),
13819 input_bfd, input_section, rel->r_offset, sym_name);
13820
13821 bfd_set_error (bfd_error_bad_value);
13822 ret = FALSE;
13823 }
13824
13825 if (can_plt_call
13826 && (stub_entry->stub_type == ppc_stub_plt_call
13827 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13828 unresolved_reloc = FALSE;
13829 }
13830
13831 if ((stub_entry == NULL
13832 || stub_entry->stub_type == ppc_stub_long_branch
13833 || stub_entry->stub_type == ppc_stub_plt_branch)
13834 && get_opd_info (sec) != NULL)
13835 {
13836 /* The branch destination is the value of the opd entry. */
13837 bfd_vma off = (relocation + addend
13838 - sec->output_section->vma
13839 - sec->output_offset);
13840 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13841 if (dest != (bfd_vma) -1)
13842 {
13843 relocation = dest;
13844 addend = 0;
13845 reloc_dest = DEST_OPD;
13846 }
13847 }
13848
13849 /* If the branch is out of reach we ought to have a long
13850 branch stub. */
13851 from = (rel->r_offset
13852 + input_section->output_offset
13853 + input_section->output_section->vma);
13854
13855 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13856 ? fdh->elf.other
13857 : sym->st_other);
13858
13859 if (stub_entry != NULL
13860 && (stub_entry->stub_type == ppc_stub_long_branch
13861 || stub_entry->stub_type == ppc_stub_plt_branch)
13862 && (r_type == R_PPC64_ADDR14_BRTAKEN
13863 || r_type == R_PPC64_ADDR14_BRNTAKEN
13864 || (relocation + addend - from + max_br_offset
13865 < 2 * max_br_offset)))
13866 /* Don't use the stub if this branch is in range. */
13867 stub_entry = NULL;
13868
13869 if (stub_entry != NULL)
13870 {
13871 /* Munge up the value and addend so that we call the stub
13872 rather than the procedure directly. */
13873 relocation = (stub_entry->stub_offset
13874 + stub_entry->stub_sec->output_offset
13875 + stub_entry->stub_sec->output_section->vma);
13876 addend = 0;
13877 reloc_dest = DEST_STUB;
13878
13879 if ((stub_entry->stub_type == ppc_stub_plt_call
13880 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13881 && (ALWAYS_EMIT_R2SAVE
13882 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13883 && rel + 1 < relend
13884 && rel[1].r_offset == rel->r_offset + 4
13885 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13886 relocation += 4;
13887 }
13888
13889 if (insn != 0)
13890 {
13891 if (is_isa_v2)
13892 {
13893 /* Set 'a' bit. This is 0b00010 in BO field for branch
13894 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13895 for branch on CTR insns (BO == 1a00t or 1a01t). */
13896 if ((insn & (0x14 << 21)) == (0x04 << 21))
13897 insn |= 0x02 << 21;
13898 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13899 insn |= 0x08 << 21;
13900 else
13901 break;
13902 }
13903 else
13904 {
13905 /* Invert 'y' bit if not the default. */
13906 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13907 insn ^= 0x01 << 21;
13908 }
13909
13910 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13911 }
13912
13913 /* NOP out calls to undefined weak functions.
13914 We can thus call a weak function without first
13915 checking whether the function is defined. */
13916 else if (h != NULL
13917 && h->elf.root.type == bfd_link_hash_undefweak
13918 && h->elf.dynindx == -1
13919 && r_type == R_PPC64_REL24
13920 && relocation == 0
13921 && addend == 0)
13922 {
13923 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13924 continue;
13925 }
13926 break;
13927 }
13928
13929 /* Set `addend'. */
13930 tls_type = 0;
13931 switch (r_type)
13932 {
13933 default:
13934 info->callbacks->einfo
13935 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13936 input_bfd, (int) r_type, sym_name);
13937
13938 bfd_set_error (bfd_error_bad_value);
13939 ret = FALSE;
13940 continue;
13941
13942 case R_PPC64_NONE:
13943 case R_PPC64_TLS:
13944 case R_PPC64_TLSGD:
13945 case R_PPC64_TLSLD:
13946 case R_PPC64_TOCSAVE:
13947 case R_PPC64_GNU_VTINHERIT:
13948 case R_PPC64_GNU_VTENTRY:
13949 continue;
13950
13951 /* GOT16 relocations. Like an ADDR16 using the symbol's
13952 address in the GOT as relocation value instead of the
13953 symbol's value itself. Also, create a GOT entry for the
13954 symbol and put the symbol value there. */
13955 case R_PPC64_GOT_TLSGD16:
13956 case R_PPC64_GOT_TLSGD16_LO:
13957 case R_PPC64_GOT_TLSGD16_HI:
13958 case R_PPC64_GOT_TLSGD16_HA:
13959 tls_type = TLS_TLS | TLS_GD;
13960 goto dogot;
13961
13962 case R_PPC64_GOT_TLSLD16:
13963 case R_PPC64_GOT_TLSLD16_LO:
13964 case R_PPC64_GOT_TLSLD16_HI:
13965 case R_PPC64_GOT_TLSLD16_HA:
13966 tls_type = TLS_TLS | TLS_LD;
13967 goto dogot;
13968
13969 case R_PPC64_GOT_TPREL16_DS:
13970 case R_PPC64_GOT_TPREL16_LO_DS:
13971 case R_PPC64_GOT_TPREL16_HI:
13972 case R_PPC64_GOT_TPREL16_HA:
13973 tls_type = TLS_TLS | TLS_TPREL;
13974 goto dogot;
13975
13976 case R_PPC64_GOT_DTPREL16_DS:
13977 case R_PPC64_GOT_DTPREL16_LO_DS:
13978 case R_PPC64_GOT_DTPREL16_HI:
13979 case R_PPC64_GOT_DTPREL16_HA:
13980 tls_type = TLS_TLS | TLS_DTPREL;
13981 goto dogot;
13982
13983 case R_PPC64_GOT16:
13984 case R_PPC64_GOT16_LO:
13985 case R_PPC64_GOT16_HI:
13986 case R_PPC64_GOT16_HA:
13987 case R_PPC64_GOT16_DS:
13988 case R_PPC64_GOT16_LO_DS:
13989 dogot:
13990 {
13991 /* Relocation is to the entry for this symbol in the global
13992 offset table. */
13993 asection *got;
13994 bfd_vma *offp;
13995 bfd_vma off;
13996 unsigned long indx = 0;
13997 struct got_entry *ent;
13998
13999 if (tls_type == (TLS_TLS | TLS_LD)
14000 && (h == NULL
14001 || !h->elf.def_dynamic))
14002 ent = ppc64_tlsld_got (input_bfd);
14003 else
14004 {
14005
14006 if (h != NULL)
14007 {
14008 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14009 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
14010 &h->elf)
14011 || (info->shared
14012 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14013 /* This is actually a static link, or it is a
14014 -Bsymbolic link and the symbol is defined
14015 locally, or the symbol was forced to be local
14016 because of a version file. */
14017 ;
14018 else
14019 {
14020 BFD_ASSERT (h->elf.dynindx != -1);
14021 indx = h->elf.dynindx;
14022 unresolved_reloc = FALSE;
14023 }
14024 ent = h->elf.got.glist;
14025 }
14026 else
14027 {
14028 if (local_got_ents == NULL)
14029 abort ();
14030 ent = local_got_ents[r_symndx];
14031 }
14032
14033 for (; ent != NULL; ent = ent->next)
14034 if (ent->addend == orig_rel.r_addend
14035 && ent->owner == input_bfd
14036 && ent->tls_type == tls_type)
14037 break;
14038 }
14039
14040 if (ent == NULL)
14041 abort ();
14042 if (ent->is_indirect)
14043 ent = ent->got.ent;
14044 offp = &ent->got.offset;
14045 got = ppc64_elf_tdata (ent->owner)->got;
14046 if (got == NULL)
14047 abort ();
14048
14049 /* The offset must always be a multiple of 8. We use the
14050 least significant bit to record whether we have already
14051 processed this entry. */
14052 off = *offp;
14053 if ((off & 1) != 0)
14054 off &= ~1;
14055 else
14056 {
14057 /* Generate relocs for the dynamic linker, except in
14058 the case of TLSLD where we'll use one entry per
14059 module. */
14060 asection *relgot;
14061 bfd_boolean ifunc;
14062
14063 *offp = off | 1;
14064 relgot = NULL;
14065 ifunc = (h != NULL
14066 ? h->elf.type == STT_GNU_IFUNC
14067 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14068 if (ifunc)
14069 relgot = htab->elf.irelplt;
14070 else if ((info->shared || indx != 0)
14071 && (h == NULL
14072 || (tls_type == (TLS_TLS | TLS_LD)
14073 && !h->elf.def_dynamic)
14074 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14075 || h->elf.root.type != bfd_link_hash_undefweak))
14076 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14077 if (relgot != NULL)
14078 {
14079 outrel.r_offset = (got->output_section->vma
14080 + got->output_offset
14081 + off);
14082 outrel.r_addend = addend;
14083 if (tls_type & (TLS_LD | TLS_GD))
14084 {
14085 outrel.r_addend = 0;
14086 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14087 if (tls_type == (TLS_TLS | TLS_GD))
14088 {
14089 loc = relgot->contents;
14090 loc += (relgot->reloc_count++
14091 * sizeof (Elf64_External_Rela));
14092 bfd_elf64_swap_reloca_out (output_bfd,
14093 &outrel, loc);
14094 outrel.r_offset += 8;
14095 outrel.r_addend = addend;
14096 outrel.r_info
14097 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14098 }
14099 }
14100 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14101 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14102 else if (tls_type == (TLS_TLS | TLS_TPREL))
14103 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14104 else if (indx != 0)
14105 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14106 else
14107 {
14108 if (ifunc)
14109 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14110 else
14111 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14112
14113 /* Write the .got section contents for the sake
14114 of prelink. */
14115 loc = got->contents + off;
14116 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14117 loc);
14118 }
14119
14120 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14121 {
14122 outrel.r_addend += relocation;
14123 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14124 outrel.r_addend -= htab->elf.tls_sec->vma;
14125 }
14126 loc = relgot->contents;
14127 loc += (relgot->reloc_count++
14128 * sizeof (Elf64_External_Rela));
14129 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14130 }
14131
14132 /* Init the .got section contents here if we're not
14133 emitting a reloc. */
14134 else
14135 {
14136 relocation += addend;
14137 if (tls_type == (TLS_TLS | TLS_LD))
14138 relocation = 1;
14139 else if (tls_type != 0)
14140 {
14141 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14142 if (tls_type == (TLS_TLS | TLS_TPREL))
14143 relocation += DTP_OFFSET - TP_OFFSET;
14144
14145 if (tls_type == (TLS_TLS | TLS_GD))
14146 {
14147 bfd_put_64 (output_bfd, relocation,
14148 got->contents + off + 8);
14149 relocation = 1;
14150 }
14151 }
14152
14153 bfd_put_64 (output_bfd, relocation,
14154 got->contents + off);
14155 }
14156 }
14157
14158 if (off >= (bfd_vma) -2)
14159 abort ();
14160
14161 relocation = got->output_section->vma + got->output_offset + off;
14162 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14163 }
14164 break;
14165
14166 case R_PPC64_PLT16_HA:
14167 case R_PPC64_PLT16_HI:
14168 case R_PPC64_PLT16_LO:
14169 case R_PPC64_PLT32:
14170 case R_PPC64_PLT64:
14171 /* Relocation is to the entry for this symbol in the
14172 procedure linkage table. */
14173
14174 /* Resolve a PLT reloc against a local symbol directly,
14175 without using the procedure linkage table. */
14176 if (h == NULL)
14177 break;
14178
14179 /* It's possible that we didn't make a PLT entry for this
14180 symbol. This happens when statically linking PIC code,
14181 or when using -Bsymbolic. Go find a match if there is a
14182 PLT entry. */
14183 if (htab->elf.splt != NULL)
14184 {
14185 struct plt_entry *ent;
14186 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14187 if (ent->plt.offset != (bfd_vma) -1
14188 && ent->addend == orig_rel.r_addend)
14189 {
14190 relocation = (htab->elf.splt->output_section->vma
14191 + htab->elf.splt->output_offset
14192 + ent->plt.offset);
14193 unresolved_reloc = FALSE;
14194 break;
14195 }
14196 }
14197 break;
14198
14199 case R_PPC64_TOC:
14200 /* Relocation value is TOC base. */
14201 relocation = TOCstart;
14202 if (r_symndx == STN_UNDEF)
14203 relocation += htab->stub_group[input_section->id].toc_off;
14204 else if (unresolved_reloc)
14205 ;
14206 else if (sec != NULL && sec->id <= htab->top_id)
14207 relocation += htab->stub_group[sec->id].toc_off;
14208 else
14209 unresolved_reloc = TRUE;
14210 goto dodyn;
14211
14212 /* TOC16 relocs. We want the offset relative to the TOC base,
14213 which is the address of the start of the TOC plus 0x8000.
14214 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14215 in this order. */
14216 case R_PPC64_TOC16:
14217 case R_PPC64_TOC16_LO:
14218 case R_PPC64_TOC16_HI:
14219 case R_PPC64_TOC16_DS:
14220 case R_PPC64_TOC16_LO_DS:
14221 case R_PPC64_TOC16_HA:
14222 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14223 break;
14224
14225 /* Relocate against the beginning of the section. */
14226 case R_PPC64_SECTOFF:
14227 case R_PPC64_SECTOFF_LO:
14228 case R_PPC64_SECTOFF_HI:
14229 case R_PPC64_SECTOFF_DS:
14230 case R_PPC64_SECTOFF_LO_DS:
14231 case R_PPC64_SECTOFF_HA:
14232 if (sec != NULL)
14233 addend -= sec->output_section->vma;
14234 break;
14235
14236 case R_PPC64_REL16:
14237 case R_PPC64_REL16_LO:
14238 case R_PPC64_REL16_HI:
14239 case R_PPC64_REL16_HA:
14240 break;
14241
14242 case R_PPC64_REL14:
14243 case R_PPC64_REL14_BRNTAKEN:
14244 case R_PPC64_REL14_BRTAKEN:
14245 case R_PPC64_REL24:
14246 break;
14247
14248 case R_PPC64_TPREL16:
14249 case R_PPC64_TPREL16_LO:
14250 case R_PPC64_TPREL16_HI:
14251 case R_PPC64_TPREL16_HA:
14252 case R_PPC64_TPREL16_DS:
14253 case R_PPC64_TPREL16_LO_DS:
14254 case R_PPC64_TPREL16_HIGH:
14255 case R_PPC64_TPREL16_HIGHA:
14256 case R_PPC64_TPREL16_HIGHER:
14257 case R_PPC64_TPREL16_HIGHERA:
14258 case R_PPC64_TPREL16_HIGHEST:
14259 case R_PPC64_TPREL16_HIGHESTA:
14260 if (h != NULL
14261 && h->elf.root.type == bfd_link_hash_undefweak
14262 && h->elf.dynindx == -1)
14263 {
14264 /* Make this relocation against an undefined weak symbol
14265 resolve to zero. This is really just a tweak, since
14266 code using weak externs ought to check that they are
14267 defined before using them. */
14268 bfd_byte *p = contents + rel->r_offset - d_offset;
14269
14270 insn = bfd_get_32 (output_bfd, p);
14271 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14272 if (insn != 0)
14273 bfd_put_32 (output_bfd, insn, p);
14274 break;
14275 }
14276 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14277 if (info->shared)
14278 /* The TPREL16 relocs shouldn't really be used in shared
14279 libs as they will result in DT_TEXTREL being set, but
14280 support them anyway. */
14281 goto dodyn;
14282 break;
14283
14284 case R_PPC64_DTPREL16:
14285 case R_PPC64_DTPREL16_LO:
14286 case R_PPC64_DTPREL16_HI:
14287 case R_PPC64_DTPREL16_HA:
14288 case R_PPC64_DTPREL16_DS:
14289 case R_PPC64_DTPREL16_LO_DS:
14290 case R_PPC64_DTPREL16_HIGH:
14291 case R_PPC64_DTPREL16_HIGHA:
14292 case R_PPC64_DTPREL16_HIGHER:
14293 case R_PPC64_DTPREL16_HIGHERA:
14294 case R_PPC64_DTPREL16_HIGHEST:
14295 case R_PPC64_DTPREL16_HIGHESTA:
14296 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14297 break;
14298
14299 case R_PPC64_ADDR64_LOCAL:
14300 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14301 ? h->elf.other
14302 : sym->st_other);
14303 break;
14304
14305 case R_PPC64_DTPMOD64:
14306 relocation = 1;
14307 addend = 0;
14308 goto dodyn;
14309
14310 case R_PPC64_TPREL64:
14311 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14312 goto dodyn;
14313
14314 case R_PPC64_DTPREL64:
14315 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14316 /* Fall thru */
14317
14318 /* Relocations that may need to be propagated if this is a
14319 dynamic object. */
14320 case R_PPC64_REL30:
14321 case R_PPC64_REL32:
14322 case R_PPC64_REL64:
14323 case R_PPC64_ADDR14:
14324 case R_PPC64_ADDR14_BRNTAKEN:
14325 case R_PPC64_ADDR14_BRTAKEN:
14326 case R_PPC64_ADDR16:
14327 case R_PPC64_ADDR16_DS:
14328 case R_PPC64_ADDR16_HA:
14329 case R_PPC64_ADDR16_HI:
14330 case R_PPC64_ADDR16_HIGH:
14331 case R_PPC64_ADDR16_HIGHA:
14332 case R_PPC64_ADDR16_HIGHER:
14333 case R_PPC64_ADDR16_HIGHERA:
14334 case R_PPC64_ADDR16_HIGHEST:
14335 case R_PPC64_ADDR16_HIGHESTA:
14336 case R_PPC64_ADDR16_LO:
14337 case R_PPC64_ADDR16_LO_DS:
14338 case R_PPC64_ADDR24:
14339 case R_PPC64_ADDR32:
14340 case R_PPC64_ADDR64:
14341 case R_PPC64_UADDR16:
14342 case R_PPC64_UADDR32:
14343 case R_PPC64_UADDR64:
14344 dodyn:
14345 if ((input_section->flags & SEC_ALLOC) == 0)
14346 break;
14347
14348 if (NO_OPD_RELOCS && is_opd)
14349 break;
14350
14351 if ((info->shared
14352 && (h == NULL
14353 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14354 || h->elf.root.type != bfd_link_hash_undefweak)
14355 && (must_be_dyn_reloc (info, r_type)
14356 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14357 || (ELIMINATE_COPY_RELOCS
14358 && !info->shared
14359 && h != NULL
14360 && h->elf.dynindx != -1
14361 && !h->elf.non_got_ref
14362 && !h->elf.def_regular)
14363 || (!info->shared
14364 && (h != NULL
14365 ? h->elf.type == STT_GNU_IFUNC
14366 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14367 {
14368 bfd_boolean skip, relocate;
14369 asection *sreloc;
14370 bfd_vma out_off;
14371
14372 /* When generating a dynamic object, these relocations
14373 are copied into the output file to be resolved at run
14374 time. */
14375
14376 skip = FALSE;
14377 relocate = FALSE;
14378
14379 out_off = _bfd_elf_section_offset (output_bfd, info,
14380 input_section, rel->r_offset);
14381 if (out_off == (bfd_vma) -1)
14382 skip = TRUE;
14383 else if (out_off == (bfd_vma) -2)
14384 skip = TRUE, relocate = TRUE;
14385 out_off += (input_section->output_section->vma
14386 + input_section->output_offset);
14387 outrel.r_offset = out_off;
14388 outrel.r_addend = rel->r_addend;
14389
14390 /* Optimize unaligned reloc use. */
14391 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14392 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14393 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14394 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14395 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14396 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14397 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14398 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14399 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14400
14401 if (skip)
14402 memset (&outrel, 0, sizeof outrel);
14403 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14404 && !is_opd
14405 && r_type != R_PPC64_TOC)
14406 {
14407 BFD_ASSERT (h->elf.dynindx != -1);
14408 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14409 }
14410 else
14411 {
14412 /* This symbol is local, or marked to become local,
14413 or this is an opd section reloc which must point
14414 at a local function. */
14415 outrel.r_addend += relocation;
14416 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14417 {
14418 if (is_opd && h != NULL)
14419 {
14420 /* Lie about opd entries. This case occurs
14421 when building shared libraries and we
14422 reference a function in another shared
14423 lib. The same thing happens for a weak
14424 definition in an application that's
14425 overridden by a strong definition in a
14426 shared lib. (I believe this is a generic
14427 bug in binutils handling of weak syms.)
14428 In these cases we won't use the opd
14429 entry in this lib. */
14430 unresolved_reloc = FALSE;
14431 }
14432 if (!is_opd
14433 && r_type == R_PPC64_ADDR64
14434 && (h != NULL
14435 ? h->elf.type == STT_GNU_IFUNC
14436 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14437 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14438 else
14439 {
14440 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14441
14442 /* We need to relocate .opd contents for ld.so.
14443 Prelink also wants simple and consistent rules
14444 for relocs. This make all RELATIVE relocs have
14445 *r_offset equal to r_addend. */
14446 relocate = TRUE;
14447 }
14448 }
14449 else
14450 {
14451 long indx = 0;
14452
14453 if (h != NULL
14454 ? h->elf.type == STT_GNU_IFUNC
14455 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14456 {
14457 info->callbacks->einfo
14458 (_("%P: %H: %s for indirect "
14459 "function `%T' unsupported\n"),
14460 input_bfd, input_section, rel->r_offset,
14461 ppc64_elf_howto_table[r_type]->name,
14462 sym_name);
14463 ret = FALSE;
14464 }
14465 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14466 ;
14467 else if (sec == NULL || sec->owner == NULL)
14468 {
14469 bfd_set_error (bfd_error_bad_value);
14470 return FALSE;
14471 }
14472 else
14473 {
14474 asection *osec;
14475
14476 osec = sec->output_section;
14477 indx = elf_section_data (osec)->dynindx;
14478
14479 if (indx == 0)
14480 {
14481 if ((osec->flags & SEC_READONLY) == 0
14482 && htab->elf.data_index_section != NULL)
14483 osec = htab->elf.data_index_section;
14484 else
14485 osec = htab->elf.text_index_section;
14486 indx = elf_section_data (osec)->dynindx;
14487 }
14488 BFD_ASSERT (indx != 0);
14489
14490 /* We are turning this relocation into one
14491 against a section symbol, so subtract out
14492 the output section's address but not the
14493 offset of the input section in the output
14494 section. */
14495 outrel.r_addend -= osec->vma;
14496 }
14497
14498 outrel.r_info = ELF64_R_INFO (indx, r_type);
14499 }
14500 }
14501
14502 sreloc = elf_section_data (input_section)->sreloc;
14503 if (h != NULL
14504 ? h->elf.type == STT_GNU_IFUNC
14505 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14506 sreloc = htab->elf.irelplt;
14507 if (sreloc == NULL)
14508 abort ();
14509
14510 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14511 >= sreloc->size)
14512 abort ();
14513 loc = sreloc->contents;
14514 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14515 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14516
14517 /* If this reloc is against an external symbol, it will
14518 be computed at runtime, so there's no need to do
14519 anything now. However, for the sake of prelink ensure
14520 that the section contents are a known value. */
14521 if (! relocate)
14522 {
14523 unresolved_reloc = FALSE;
14524 /* The value chosen here is quite arbitrary as ld.so
14525 ignores section contents except for the special
14526 case of .opd where the contents might be accessed
14527 before relocation. Choose zero, as that won't
14528 cause reloc overflow. */
14529 relocation = 0;
14530 addend = 0;
14531 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14532 to improve backward compatibility with older
14533 versions of ld. */
14534 if (r_type == R_PPC64_ADDR64)
14535 addend = outrel.r_addend;
14536 /* Adjust pc_relative relocs to have zero in *r_offset. */
14537 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14538 addend = (input_section->output_section->vma
14539 + input_section->output_offset
14540 + rel->r_offset);
14541 }
14542 }
14543 break;
14544
14545 case R_PPC64_COPY:
14546 case R_PPC64_GLOB_DAT:
14547 case R_PPC64_JMP_SLOT:
14548 case R_PPC64_JMP_IREL:
14549 case R_PPC64_RELATIVE:
14550 /* We shouldn't ever see these dynamic relocs in relocatable
14551 files. */
14552 /* Fall through. */
14553
14554 case R_PPC64_PLTGOT16:
14555 case R_PPC64_PLTGOT16_DS:
14556 case R_PPC64_PLTGOT16_HA:
14557 case R_PPC64_PLTGOT16_HI:
14558 case R_PPC64_PLTGOT16_LO:
14559 case R_PPC64_PLTGOT16_LO_DS:
14560 case R_PPC64_PLTREL32:
14561 case R_PPC64_PLTREL64:
14562 /* These ones haven't been implemented yet. */
14563
14564 info->callbacks->einfo
14565 (_("%P: %B: %s is not supported for `%T'\n"),
14566 input_bfd,
14567 ppc64_elf_howto_table[r_type]->name, sym_name);
14568
14569 bfd_set_error (bfd_error_invalid_operation);
14570 ret = FALSE;
14571 continue;
14572 }
14573
14574 /* Multi-instruction sequences that access the TOC can be
14575 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14576 to nop; addi rb,r2,x; */
14577 switch (r_type)
14578 {
14579 default:
14580 break;
14581
14582 case R_PPC64_GOT_TLSLD16_HI:
14583 case R_PPC64_GOT_TLSGD16_HI:
14584 case R_PPC64_GOT_TPREL16_HI:
14585 case R_PPC64_GOT_DTPREL16_HI:
14586 case R_PPC64_GOT16_HI:
14587 case R_PPC64_TOC16_HI:
14588 /* These relocs would only be useful if building up an
14589 offset to later add to r2, perhaps in an indexed
14590 addressing mode instruction. Don't try to optimize.
14591 Unfortunately, the possibility of someone building up an
14592 offset like this or even with the HA relocs, means that
14593 we need to check the high insn when optimizing the low
14594 insn. */
14595 break;
14596
14597 case R_PPC64_GOT_TLSLD16_HA:
14598 case R_PPC64_GOT_TLSGD16_HA:
14599 case R_PPC64_GOT_TPREL16_HA:
14600 case R_PPC64_GOT_DTPREL16_HA:
14601 case R_PPC64_GOT16_HA:
14602 case R_PPC64_TOC16_HA:
14603 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14604 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14605 {
14606 bfd_byte *p = contents + (rel->r_offset & ~3);
14607 bfd_put_32 (input_bfd, NOP, p);
14608 }
14609 break;
14610
14611 case R_PPC64_GOT_TLSLD16_LO:
14612 case R_PPC64_GOT_TLSGD16_LO:
14613 case R_PPC64_GOT_TPREL16_LO_DS:
14614 case R_PPC64_GOT_DTPREL16_LO_DS:
14615 case R_PPC64_GOT16_LO:
14616 case R_PPC64_GOT16_LO_DS:
14617 case R_PPC64_TOC16_LO:
14618 case R_PPC64_TOC16_LO_DS:
14619 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14620 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14621 {
14622 bfd_byte *p = contents + (rel->r_offset & ~3);
14623 insn = bfd_get_32 (input_bfd, p);
14624 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14625 {
14626 /* Transform addic to addi when we change reg. */
14627 insn &= ~((0x3f << 26) | (0x1f << 16));
14628 insn |= (14u << 26) | (2 << 16);
14629 }
14630 else
14631 {
14632 insn &= ~(0x1f << 16);
14633 insn |= 2 << 16;
14634 }
14635 bfd_put_32 (input_bfd, insn, p);
14636 }
14637 break;
14638 }
14639
14640 /* Do any further special processing. */
14641 howto = ppc64_elf_howto_table[(int) r_type];
14642 switch (r_type)
14643 {
14644 default:
14645 break;
14646
14647 case R_PPC64_REL16_HA:
14648 case R_PPC64_ADDR16_HA:
14649 case R_PPC64_ADDR16_HIGHA:
14650 case R_PPC64_ADDR16_HIGHERA:
14651 case R_PPC64_ADDR16_HIGHESTA:
14652 case R_PPC64_TOC16_HA:
14653 case R_PPC64_SECTOFF_HA:
14654 case R_PPC64_TPREL16_HA:
14655 case R_PPC64_TPREL16_HIGHA:
14656 case R_PPC64_TPREL16_HIGHERA:
14657 case R_PPC64_TPREL16_HIGHESTA:
14658 case R_PPC64_DTPREL16_HA:
14659 case R_PPC64_DTPREL16_HIGHA:
14660 case R_PPC64_DTPREL16_HIGHERA:
14661 case R_PPC64_DTPREL16_HIGHESTA:
14662 /* It's just possible that this symbol is a weak symbol
14663 that's not actually defined anywhere. In that case,
14664 'sec' would be NULL, and we should leave the symbol
14665 alone (it will be set to zero elsewhere in the link). */
14666 if (sec == NULL)
14667 break;
14668 /* Fall thru */
14669
14670 case R_PPC64_GOT16_HA:
14671 case R_PPC64_PLTGOT16_HA:
14672 case R_PPC64_PLT16_HA:
14673 case R_PPC64_GOT_TLSGD16_HA:
14674 case R_PPC64_GOT_TLSLD16_HA:
14675 case R_PPC64_GOT_TPREL16_HA:
14676 case R_PPC64_GOT_DTPREL16_HA:
14677 /* Add 0x10000 if sign bit in 0:15 is set.
14678 Bits 0:15 are not used. */
14679 addend += 0x8000;
14680 break;
14681
14682 case R_PPC64_ADDR16_DS:
14683 case R_PPC64_ADDR16_LO_DS:
14684 case R_PPC64_GOT16_DS:
14685 case R_PPC64_GOT16_LO_DS:
14686 case R_PPC64_PLT16_LO_DS:
14687 case R_PPC64_SECTOFF_DS:
14688 case R_PPC64_SECTOFF_LO_DS:
14689 case R_PPC64_TOC16_DS:
14690 case R_PPC64_TOC16_LO_DS:
14691 case R_PPC64_PLTGOT16_DS:
14692 case R_PPC64_PLTGOT16_LO_DS:
14693 case R_PPC64_GOT_TPREL16_DS:
14694 case R_PPC64_GOT_TPREL16_LO_DS:
14695 case R_PPC64_GOT_DTPREL16_DS:
14696 case R_PPC64_GOT_DTPREL16_LO_DS:
14697 case R_PPC64_TPREL16_DS:
14698 case R_PPC64_TPREL16_LO_DS:
14699 case R_PPC64_DTPREL16_DS:
14700 case R_PPC64_DTPREL16_LO_DS:
14701 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14702 mask = 3;
14703 /* If this reloc is against an lq insn, then the value must be
14704 a multiple of 16. This is somewhat of a hack, but the
14705 "correct" way to do this by defining _DQ forms of all the
14706 _DS relocs bloats all reloc switches in this file. It
14707 doesn't seem to make much sense to use any of these relocs
14708 in data, so testing the insn should be safe. */
14709 if ((insn & (0x3f << 26)) == (56u << 26))
14710 mask = 15;
14711 if (((relocation + addend) & mask) != 0)
14712 {
14713 info->callbacks->einfo
14714 (_("%P: %H: error: %s not a multiple of %u\n"),
14715 input_bfd, input_section, rel->r_offset,
14716 howto->name,
14717 mask + 1);
14718 bfd_set_error (bfd_error_bad_value);
14719 ret = FALSE;
14720 continue;
14721 }
14722 break;
14723 }
14724
14725 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14726 because such sections are not SEC_ALLOC and thus ld.so will
14727 not process them. */
14728 if (unresolved_reloc
14729 && !((input_section->flags & SEC_DEBUGGING) != 0
14730 && h->elf.def_dynamic)
14731 && _bfd_elf_section_offset (output_bfd, info, input_section,
14732 rel->r_offset) != (bfd_vma) -1)
14733 {
14734 info->callbacks->einfo
14735 (_("%P: %H: unresolvable %s against `%T'\n"),
14736 input_bfd, input_section, rel->r_offset,
14737 howto->name,
14738 h->elf.root.root.string);
14739 ret = FALSE;
14740 }
14741
14742 /* 16-bit fields in insns mostly have signed values, but a
14743 few insns have 16-bit unsigned values. Really, we should
14744 have different reloc types. */
14745 if (howto->complain_on_overflow != complain_overflow_dont
14746 && howto->dst_mask == 0xffff
14747 && (input_section->flags & SEC_CODE) != 0)
14748 {
14749 enum complain_overflow complain = complain_overflow_signed;
14750
14751 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14752 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
14753 complain = complain_overflow_bitfield;
14754 else if (howto->rightshift == 0
14755 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
14756 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
14757 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
14758 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
14759 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
14760 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
14761 complain = complain_overflow_unsigned;
14762 if (howto->complain_on_overflow != complain)
14763 {
14764 alt_howto = *howto;
14765 alt_howto.complain_on_overflow = complain;
14766 howto = &alt_howto;
14767 }
14768 }
14769
14770 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
14771 rel->r_offset, relocation, addend);
14772
14773 if (r != bfd_reloc_ok)
14774 {
14775 char *more_info = NULL;
14776 const char *reloc_name = howto->name;
14777
14778 if (reloc_dest != DEST_NORMAL)
14779 {
14780 more_info = bfd_malloc (strlen (reloc_name) + 8);
14781 if (more_info != NULL)
14782 {
14783 strcpy (more_info, reloc_name);
14784 strcat (more_info, (reloc_dest == DEST_OPD
14785 ? " (OPD)" : " (stub)"));
14786 reloc_name = more_info;
14787 }
14788 }
14789
14790 if (r == bfd_reloc_overflow)
14791 {
14792 if (warned)
14793 continue;
14794 if (h != NULL
14795 && h->elf.root.type == bfd_link_hash_undefweak
14796 && howto->pc_relative)
14797 {
14798 /* Assume this is a call protected by other code that
14799 detects the symbol is undefined. If this is the case,
14800 we can safely ignore the overflow. If not, the
14801 program is hosed anyway, and a little warning isn't
14802 going to help. */
14803
14804 continue;
14805 }
14806
14807 if (!((*info->callbacks->reloc_overflow)
14808 (info, &h->elf.root, sym_name,
14809 reloc_name, orig_rel.r_addend,
14810 input_bfd, input_section, rel->r_offset)))
14811 return FALSE;
14812 }
14813 else
14814 {
14815 info->callbacks->einfo
14816 (_("%P: %H: %s against `%T': error %d\n"),
14817 input_bfd, input_section, rel->r_offset,
14818 reloc_name, sym_name, (int) r);
14819 ret = FALSE;
14820 }
14821 if (more_info != NULL)
14822 free (more_info);
14823 }
14824 }
14825
14826 /* If we're emitting relocations, then shortly after this function
14827 returns, reloc offsets and addends for this section will be
14828 adjusted. Worse, reloc symbol indices will be for the output
14829 file rather than the input. Save a copy of the relocs for
14830 opd_entry_value. */
14831 if (is_opd && (info->emitrelocations || info->relocatable))
14832 {
14833 bfd_size_type amt;
14834 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14835 rel = bfd_alloc (input_bfd, amt);
14836 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14837 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14838 if (rel == NULL)
14839 return FALSE;
14840 memcpy (rel, relocs, amt);
14841 }
14842 return ret;
14843}
14844
14845/* Adjust the value of any local symbols in opd sections. */
14846
14847static int
14848ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14849 const char *name ATTRIBUTE_UNUSED,
14850 Elf_Internal_Sym *elfsym,
14851 asection *input_sec,
14852 struct elf_link_hash_entry *h)
14853{
14854 struct _opd_sec_data *opd;
14855 long adjust;
14856 bfd_vma value;
14857
14858 if (h != NULL)
14859 return 1;
14860
14861 opd = get_opd_info (input_sec);
14862 if (opd == NULL || opd->adjust == NULL)
14863 return 1;
14864
14865 value = elfsym->st_value - input_sec->output_offset;
14866 if (!info->relocatable)
14867 value -= input_sec->output_section->vma;
14868
14869 adjust = opd->adjust[OPD_NDX (value)];
14870 if (adjust == -1)
14871 return 2;
14872
14873 elfsym->st_value += adjust;
14874 return 1;
14875}
14876
14877/* Finish up dynamic symbol handling. We set the contents of various
14878 dynamic sections here. */
14879
14880static bfd_boolean
14881ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14882 struct bfd_link_info *info,
14883 struct elf_link_hash_entry *h,
14884 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14885{
14886 struct ppc_link_hash_table *htab;
14887 struct plt_entry *ent;
14888 Elf_Internal_Rela rela;
14889 bfd_byte *loc;
14890
14891 htab = ppc_hash_table (info);
14892 if (htab == NULL)
14893 return FALSE;
14894
14895 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14896 if (ent->plt.offset != (bfd_vma) -1)
14897 {
14898 /* This symbol has an entry in the procedure linkage
14899 table. Set it up. */
14900 if (!htab->elf.dynamic_sections_created
14901 || h->dynindx == -1)
14902 {
14903 BFD_ASSERT (h->type == STT_GNU_IFUNC
14904 && h->def_regular
14905 && (h->root.type == bfd_link_hash_defined
14906 || h->root.type == bfd_link_hash_defweak));
14907 rela.r_offset = (htab->elf.iplt->output_section->vma
14908 + htab->elf.iplt->output_offset
14909 + ent->plt.offset);
14910 if (htab->opd_abi)
14911 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14912 else
14913 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14914 rela.r_addend = (h->root.u.def.value
14915 + h->root.u.def.section->output_offset
14916 + h->root.u.def.section->output_section->vma
14917 + ent->addend);
14918 loc = (htab->elf.irelplt->contents
14919 + (htab->elf.irelplt->reloc_count++
14920 * sizeof (Elf64_External_Rela)));
14921 }
14922 else
14923 {
14924 rela.r_offset = (htab->elf.splt->output_section->vma
14925 + htab->elf.splt->output_offset
14926 + ent->plt.offset);
14927 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14928 rela.r_addend = ent->addend;
14929 loc = (htab->elf.srelplt->contents
14930 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14931 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14932 }
14933 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14934
14935 if (!htab->opd_abi)
14936 {
14937 if (!h->def_regular)
14938 {
14939 /* Mark the symbol as undefined, rather than as
14940 defined in glink. Leave the value if there were
14941 any relocations where pointer equality matters
14942 (this is a clue for the dynamic linker, to make
14943 function pointer comparisons work between an
14944 application and shared library), otherwise set it
14945 to zero. */
14946 sym->st_shndx = SHN_UNDEF;
14947 if (!h->pointer_equality_needed)
14948 sym->st_value = 0;
14949 else if (!h->ref_regular_nonweak)
14950 {
14951 /* This breaks function pointer comparisons, but
14952 that is better than breaking tests for a NULL
14953 function pointer. */
14954 sym->st_value = 0;
14955 }
14956 }
14957 }
14958 }
14959
14960 if (h->needs_copy)
14961 {
14962 /* This symbol needs a copy reloc. Set it up. */
14963
14964 if (h->dynindx == -1
14965 || (h->root.type != bfd_link_hash_defined
14966 && h->root.type != bfd_link_hash_defweak)
14967 || htab->relbss == NULL)
14968 abort ();
14969
14970 rela.r_offset = (h->root.u.def.value
14971 + h->root.u.def.section->output_section->vma
14972 + h->root.u.def.section->output_offset);
14973 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14974 rela.r_addend = 0;
14975 loc = htab->relbss->contents;
14976 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14977 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14978 }
14979
14980 return TRUE;
14981}
14982
14983/* Used to decide how to sort relocs in an optimal manner for the
14984 dynamic linker, before writing them out. */
14985
14986static enum elf_reloc_type_class
14987ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14988 const asection *rel_sec,
14989 const Elf_Internal_Rela *rela)
14990{
14991 enum elf_ppc64_reloc_type r_type;
14992 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14993
14994 if (rel_sec == htab->elf.irelplt)
14995 return reloc_class_ifunc;
14996
14997 r_type = ELF64_R_TYPE (rela->r_info);
14998 switch (r_type)
14999 {
15000 case R_PPC64_RELATIVE:
15001 return reloc_class_relative;
15002 case R_PPC64_JMP_SLOT:
15003 return reloc_class_plt;
15004 case R_PPC64_COPY:
15005 return reloc_class_copy;
15006 default:
15007 return reloc_class_normal;
15008 }
15009}
15010
15011/* Finish up the dynamic sections. */
15012
15013static bfd_boolean
15014ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15015 struct bfd_link_info *info)
15016{
15017 struct ppc_link_hash_table *htab;
15018 bfd *dynobj;
15019 asection *sdyn;
15020
15021 htab = ppc_hash_table (info);
15022 if (htab == NULL)
15023 return FALSE;
15024
15025 dynobj = htab->elf.dynobj;
15026 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15027
15028 if (htab->elf.dynamic_sections_created)
15029 {
15030 Elf64_External_Dyn *dyncon, *dynconend;
15031
15032 if (sdyn == NULL || htab->elf.sgot == NULL)
15033 abort ();
15034
15035 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15036 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15037 for (; dyncon < dynconend; dyncon++)
15038 {
15039 Elf_Internal_Dyn dyn;
15040 asection *s;
15041
15042 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15043
15044 switch (dyn.d_tag)
15045 {
15046 default:
15047 continue;
15048
15049 case DT_PPC64_GLINK:
15050 s = htab->glink;
15051 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15052 /* We stupidly defined DT_PPC64_GLINK to be the start
15053 of glink rather than the first entry point, which is
15054 what ld.so needs, and now have a bigger stub to
15055 support automatic multiple TOCs. */
15056 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15057 break;
15058
15059 case DT_PPC64_OPD:
15060 s = bfd_get_section_by_name (output_bfd, ".opd");
15061 if (s == NULL)
15062 continue;
15063 dyn.d_un.d_ptr = s->vma;
15064 break;
15065
15066 case DT_PPC64_OPT:
15067 if (htab->do_multi_toc && htab->multi_toc_needed)
15068 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15069 break;
15070
15071 case DT_PPC64_OPDSZ:
15072 s = bfd_get_section_by_name (output_bfd, ".opd");
15073 if (s == NULL)
15074 continue;
15075 dyn.d_un.d_val = s->size;
15076 break;
15077
15078 case DT_PLTGOT:
15079 s = htab->elf.splt;
15080 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15081 break;
15082
15083 case DT_JMPREL:
15084 s = htab->elf.srelplt;
15085 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15086 break;
15087
15088 case DT_PLTRELSZ:
15089 dyn.d_un.d_val = htab->elf.srelplt->size;
15090 break;
15091
15092 case DT_RELASZ:
15093 /* Don't count procedure linkage table relocs in the
15094 overall reloc count. */
15095 s = htab->elf.srelplt;
15096 if (s == NULL)
15097 continue;
15098 dyn.d_un.d_val -= s->size;
15099 break;
15100
15101 case DT_RELA:
15102 /* We may not be using the standard ELF linker script.
15103 If .rela.plt is the first .rela section, we adjust
15104 DT_RELA to not include it. */
15105 s = htab->elf.srelplt;
15106 if (s == NULL)
15107 continue;
15108 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
15109 continue;
15110 dyn.d_un.d_ptr += s->size;
15111 break;
15112 }
15113
15114 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15115 }
15116 }
15117
15118 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15119 {
15120 /* Fill in the first entry in the global offset table.
15121 We use it to hold the link-time TOCbase. */
15122 bfd_put_64 (output_bfd,
15123 elf_gp (output_bfd) + TOC_BASE_OFF,
15124 htab->elf.sgot->contents);
15125
15126 /* Set .got entry size. */
15127 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15128 }
15129
15130 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15131 {
15132 /* Set .plt entry size. */
15133 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15134 = PLT_ENTRY_SIZE (htab);
15135 }
15136
15137 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15138 brlt ourselves if emitrelocations. */
15139 if (htab->brlt != NULL
15140 && htab->brlt->reloc_count != 0
15141 && !_bfd_elf_link_output_relocs (output_bfd,
15142 htab->brlt,
15143 elf_section_data (htab->brlt)->rela.hdr,
15144 elf_section_data (htab->brlt)->relocs,
15145 NULL))
15146 return FALSE;
15147
15148 if (htab->glink != NULL
15149 && htab->glink->reloc_count != 0
15150 && !_bfd_elf_link_output_relocs (output_bfd,
15151 htab->glink,
15152 elf_section_data (htab->glink)->rela.hdr,
15153 elf_section_data (htab->glink)->relocs,
15154 NULL))
15155 return FALSE;
15156
15157 if (htab->glink_eh_frame != NULL
15158 && htab->glink_eh_frame->size != 0)
15159 {
15160 bfd_vma val;
15161 bfd_byte *p;
15162 asection *stub_sec;
15163
15164 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15165 for (stub_sec = htab->params->stub_bfd->sections;
15166 stub_sec != NULL;
15167 stub_sec = stub_sec->next)
15168 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15169 {
15170 /* FDE length. */
15171 p += 4;
15172 /* CIE pointer. */
15173 p += 4;
15174 /* Offset to stub section. */
15175 val = (stub_sec->output_section->vma
15176 + stub_sec->output_offset);
15177 val -= (htab->glink_eh_frame->output_section->vma
15178 + htab->glink_eh_frame->output_offset
15179 + (p - htab->glink_eh_frame->contents));
15180 if (val + 0x80000000 > 0xffffffff)
15181 {
15182 info->callbacks->einfo
15183 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15184 stub_sec->name);
15185 return FALSE;
15186 }
15187 bfd_put_32 (dynobj, val, p);
15188 p += 4;
15189 /* stub section size. */
15190 p += 4;
15191 /* Augmentation. */
15192 p += 1;
15193 /* Pad. */
15194 p += 7;
15195 }
15196 if (htab->glink != NULL && htab->glink->size != 0)
15197 {
15198 /* FDE length. */
15199 p += 4;
15200 /* CIE pointer. */
15201 p += 4;
15202 /* Offset to .glink. */
15203 val = (htab->glink->output_section->vma
15204 + htab->glink->output_offset
15205 + 8);
15206 val -= (htab->glink_eh_frame->output_section->vma
15207 + htab->glink_eh_frame->output_offset
15208 + (p - htab->glink_eh_frame->contents));
15209 if (val + 0x80000000 > 0xffffffff)
15210 {
15211 info->callbacks->einfo
15212 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15213 htab->glink->name);
15214 return FALSE;
15215 }
15216 bfd_put_32 (dynobj, val, p);
15217 p += 4;
15218 /* .glink size. */
15219 p += 4;
15220 /* Augmentation. */
15221 p += 1;
15222 /* Ops. */
15223 p += 7;
15224 }
15225
15226 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15227 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15228 htab->glink_eh_frame,
15229 htab->glink_eh_frame->contents))
15230 return FALSE;
15231 }
15232
15233 /* We need to handle writing out multiple GOT sections ourselves,
15234 since we didn't add them to DYNOBJ. We know dynobj is the first
15235 bfd. */
15236 while ((dynobj = dynobj->link.next) != NULL)
15237 {
15238 asection *s;
15239
15240 if (!is_ppc64_elf (dynobj))
15241 continue;
15242
15243 s = ppc64_elf_tdata (dynobj)->got;
15244 if (s != NULL
15245 && s->size != 0
15246 && s->output_section != bfd_abs_section_ptr
15247 && !bfd_set_section_contents (output_bfd, s->output_section,
15248 s->contents, s->output_offset,
15249 s->size))
15250 return FALSE;
15251 s = ppc64_elf_tdata (dynobj)->relgot;
15252 if (s != NULL
15253 && s->size != 0
15254 && s->output_section != bfd_abs_section_ptr
15255 && !bfd_set_section_contents (output_bfd, s->output_section,
15256 s->contents, s->output_offset,
15257 s->size))
15258 return FALSE;
15259 }
15260
15261 return TRUE;
15262}
15263
15264#include "elf64-target.h"
15265
15266/* FreeBSD support */
15267
15268#undef TARGET_LITTLE_SYM
15269#undef TARGET_LITTLE_NAME
15270
15271#undef TARGET_BIG_SYM
15272#define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15273#undef TARGET_BIG_NAME
15274#define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15275
15276#undef ELF_OSABI
15277#define ELF_OSABI ELFOSABI_FREEBSD
15278
15279#undef elf64_bed
15280#define elf64_bed elf64_powerpc_fbsd_bed
15281
15282#include "elf64-target.h"
15283
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