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PowerPC64 __tls_get_addr sequence optimization
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
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1/* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 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_want_dynrelro 1
76#define elf_backend_can_gc_sections 1
77#define elf_backend_can_refcount 1
78#define elf_backend_rela_normal 1
79#define elf_backend_dtrel_excludes_plt 1
80#define elf_backend_default_execstack 0
81
82#define bfd_elf64_mkobject ppc64_elf_mkobject
83#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86#define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91#define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93#define elf_backend_object_p ppc64_elf_object_p
94#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96#define elf_backend_write_core_note ppc64_elf_write_core_note
97#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100#define elf_backend_check_directives ppc64_elf_before_check_relocs
101#define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103#define elf_backend_check_relocs ppc64_elf_check_relocs
104#define elf_backend_gc_keep ppc64_elf_gc_keep
105#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109#define elf_backend_hide_symbol ppc64_elf_hide_symbol
110#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113#define elf_backend_hash_symbol ppc64_elf_hash_symbol
114#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115#define elf_backend_action_discarded ppc64_elf_action_discarded
116#define elf_backend_relocate_section ppc64_elf_relocate_section
117#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121#define elf_backend_special_sections ppc64_elf_special_sections
122#define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123#define elf_backend_merge_symbol ppc64_elf_merge_symbol
124#define elf_backend_get_reloc_section bfd_get_section_by_name
125
126/* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130/* The size in bytes of an entry in the procedure linkage table. */
131#define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133/* The initial size of the plt reserved for the dynamic linker. */
134#define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136/* Offsets to some stack save slots. */
137#define STK_LR 16
138#define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139/* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142#define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144/* TOC base pointers offset from start of TOC. */
145#define TOC_BASE_OFF 0x8000
146/* TOC base alignment. */
147#define TOC_BASE_ALIGN 256
148
149/* Offset of tp and dtp pointers from start of TLS block. */
150#define TP_OFFSET 0x7000
151#define DTP_OFFSET 0x8000
152
153/* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156#define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157#define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158#define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159#define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160#define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161#define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162#define BCTR 0x4e800420 /* bctr */
163
164#define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168#define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169#define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170#define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173#define BNECTR 0x4ca20420 /* bnectr+ */
174#define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176#define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180#define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181#define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182#define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184#define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185#define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188#define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190/* glink call stub instructions. We enter with the index in R0. */
191#define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195#define MFLR_R12 0x7d8802a6 /* mflr %12 */
196#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198#define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201#define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207#define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209#define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210#define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211#define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213/* Pad with this. */
214#define NOP 0x60000000
215
216/* Some other nops. */
217#define CROR_151515 0x4def7b82
218#define CROR_313131 0x4ffffb82
219
220/* .glink entries for the first 32k functions are two instructions. */
221#define LI_R0_0 0x38000000 /* li %r0,0 */
222#define B_DOT 0x48000000 /* b . */
223
224/* After that, we need two instructions to load the index, followed by
225 a branch. */
226#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229/* Instructions used by the save and restore reg functions. */
230#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236#define LI_R12_0 0x39800000 /* li %r12,0 */
237#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240#define BLR 0x4e800020 /* blr */
241
242/* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246#ifndef NO_OPD_RELOCS
247#define NO_OPD_RELOCS 0
248#endif
249
250#ifndef ARRAY_SIZE
251#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252#endif
253
254static inline int
255abiversion (bfd *abfd)
256{
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258}
259
260static inline void
261set_abiversion (bfd *abfd, int ver)
262{
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265}
266\f
267#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269/* Relocation HOWTO's. */
270static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* 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_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* 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_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* 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. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* 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_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* 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_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* 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_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* 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_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* 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_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* 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_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* 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 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* 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. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* 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 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_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_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_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_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_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_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_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_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_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_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_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_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_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_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_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_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
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_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
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_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
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_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* 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_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
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_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_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_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
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_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
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_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
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_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* 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_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
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_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_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_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
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_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
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_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
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_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
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_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_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_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
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_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_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_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
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_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* 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_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* 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. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
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 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
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_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
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_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213};
2214
2215\f
2216/* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219static void
2220ppc_howto_init (void)
2221{
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230}
2231
2232static reloc_howto_type *
2233ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235{
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484};
2485
2486static reloc_howto_type *
2487ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489{
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498}
2499
2500/* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502static void
2503ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505{
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521}
2522
2523/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525static bfd_reloc_status_type
2526ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529{
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569}
2570
2571static bfd_reloc_status_type
2572ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575{
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616}
2617
2618static bfd_reloc_status_type
2619ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622{
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679}
2680
2681static bfd_reloc_status_type
2682ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
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 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696}
2697
2698static bfd_reloc_status_type
2699ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702{
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716}
2717
2718static bfd_reloc_status_type
2719ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722{
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739}
2740
2741static bfd_reloc_status_type
2742ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745{
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765}
2766
2767static bfd_reloc_status_type
2768ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771{
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789}
2790
2791static bfd_reloc_status_type
2792ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795{
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811}
2812
2813/* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815struct got_entry
2816{
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845};
2846
2847/* The same for PLT. */
2848struct plt_entry
2849{
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859};
2860
2861struct ppc64_elf_obj_tdata
2862{
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892};
2893
2894#define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897#define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900#define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904/* Override the generic function because we store some extras. */
2905
2906static bfd_boolean
2907ppc64_elf_mkobject (bfd *abfd)
2908{
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911}
2912
2913/* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916static bfd_boolean
2917ppc64_elf_object_p (bfd *abfd)
2918{
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934}
2935
2936/* Support for core dump NOTE sections. */
2937
2938static bfd_boolean
2939ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940{
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959}
2960
2961static bfd_boolean
2962ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963{
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975}
2976
2977static char *
2978ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980{
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022}
3023
3024/* Add extra PPC sections. */
3025
3026static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027{
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035};
3036
3037enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041};
3042
3043struct _ppc64_elf_section_data
3044{
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051#define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077};
3078
3079#define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082static bfd_boolean
3083ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084{
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097}
3098
3099static struct _opd_sec_data *
3100get_opd_info (asection * sec)
3101{
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107}
3108\f
3109/* Parameters for the qsort hook. */
3110static bfd_boolean synthetic_relocatable;
3111static asection *synthetic_opd;
3112
3113/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115static int
3116compare_symbols (const void *ap, const void *bp)
3117{
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193}
3194
3195/* Search SYMS for a symbol of the given VALUE. */
3196
3197static asymbol *
3198sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199{
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233}
3234
3235static bfd_boolean
3236section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237{
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242}
3243
3244/* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248static long
3249ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253{
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714}
3715\f
3716/* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788/* Of those relocs that might be copied as dynamic relocs, this
3789 function selects those that must be copied when linking a shared
3790 library or PIE, even when the symbol is local. */
3791
3792static int
3793must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795{
3796 switch (r_type)
3797 {
3798 default:
3799 /* Only relative relocs can be resolved when the object load
3800 address isn't fixed. DTPREL64 is excluded because the
3801 dynamic linker needs to differentiate global dynamic from
3802 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3803 return 1;
3804
3805 case R_PPC64_REL32:
3806 case R_PPC64_REL64:
3807 case R_PPC64_REL30:
3808 return 0;
3809
3810 case R_PPC64_TPREL16:
3811 case R_PPC64_TPREL16_LO:
3812 case R_PPC64_TPREL16_HI:
3813 case R_PPC64_TPREL16_HA:
3814 case R_PPC64_TPREL16_DS:
3815 case R_PPC64_TPREL16_LO_DS:
3816 case R_PPC64_TPREL16_HIGH:
3817 case R_PPC64_TPREL16_HIGHA:
3818 case R_PPC64_TPREL16_HIGHER:
3819 case R_PPC64_TPREL16_HIGHERA:
3820 case R_PPC64_TPREL16_HIGHEST:
3821 case R_PPC64_TPREL16_HIGHESTA:
3822 case R_PPC64_TPREL64:
3823 /* These relocations are relative but in a shared library the
3824 linker doesn't know the thread pointer base. */
3825 return bfd_link_dll (info);
3826 }
3827}
3828
3829/* Whether an undefined weak symbol should resolve to its link-time
3830 value, even in PIC or PIE objects. */
3831#define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3832 ((H)->root.type == bfd_link_hash_undefweak \
3833 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3834 || (INFO)->dynamic_undefined_weak == 0))
3835
3836/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3837 copying dynamic variables from a shared lib into an app's dynbss
3838 section, and instead use a dynamic relocation to point into the
3839 shared lib. With code that gcc generates, it's vital that this be
3840 enabled; In the PowerPC64 ABI, the address of a function is actually
3841 the address of a function descriptor, which resides in the .opd
3842 section. gcc uses the descriptor directly rather than going via the
3843 GOT as some other ABI's do, which means that initialized function
3844 pointers must reference the descriptor. Thus, a function pointer
3845 initialized to the address of a function in a shared library will
3846 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3847 redefines the function descriptor symbol to point to the copy. This
3848 presents a problem as a plt entry for that function is also
3849 initialized from the function descriptor symbol and the copy reloc
3850 may not be initialized first. */
3851#define ELIMINATE_COPY_RELOCS 1
3852
3853/* Section name for stubs is the associated section name plus this
3854 string. */
3855#define STUB_SUFFIX ".stub"
3856
3857/* Linker stubs.
3858 ppc_stub_long_branch:
3859 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3860 destination, but a 24 bit branch in a stub section will reach.
3861 . b dest
3862
3863 ppc_stub_plt_branch:
3864 Similar to the above, but a 24 bit branch in the stub section won't
3865 reach its destination.
3866 . addis %r11,%r2,xxx@toc@ha
3867 . ld %r12,xxx@toc@l(%r11)
3868 . mtctr %r12
3869 . bctr
3870
3871 ppc_stub_plt_call:
3872 Used to call a function in a shared library. If it so happens that
3873 the plt entry referenced crosses a 64k boundary, then an extra
3874 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3875 . std %r2,40(%r1)
3876 . addis %r11,%r2,xxx@toc@ha
3877 . ld %r12,xxx+0@toc@l(%r11)
3878 . mtctr %r12
3879 . ld %r2,xxx+8@toc@l(%r11)
3880 . ld %r11,xxx+16@toc@l(%r11)
3881 . bctr
3882
3883 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3884 code to adjust the value and save r2 to support multiple toc sections.
3885 A ppc_stub_long_branch with an r2 offset looks like:
3886 . std %r2,40(%r1)
3887 . addis %r2,%r2,off@ha
3888 . addi %r2,%r2,off@l
3889 . b dest
3890
3891 A ppc_stub_plt_branch with an r2 offset looks like:
3892 . std %r2,40(%r1)
3893 . addis %r11,%r2,xxx@toc@ha
3894 . ld %r12,xxx@toc@l(%r11)
3895 . addis %r2,%r2,off@ha
3896 . addi %r2,%r2,off@l
3897 . mtctr %r12
3898 . bctr
3899
3900 In cases where the "addis" instruction would add zero, the "addis" is
3901 omitted and following instructions modified slightly in some cases.
3902*/
3903
3904enum ppc_stub_type {
3905 ppc_stub_none,
3906 ppc_stub_long_branch,
3907 ppc_stub_long_branch_r2off,
3908 ppc_stub_plt_branch,
3909 ppc_stub_plt_branch_r2off,
3910 ppc_stub_plt_call,
3911 ppc_stub_plt_call_r2save,
3912 ppc_stub_global_entry,
3913 ppc_stub_save_res
3914};
3915
3916/* Information on stub grouping. */
3917struct map_stub
3918{
3919 /* The stub section. */
3920 asection *stub_sec;
3921 /* This is the section to which stubs in the group will be attached. */
3922 asection *link_sec;
3923 /* Next group. */
3924 struct map_stub *next;
3925 /* Whether to emit a copy of register save/restore functions in this
3926 group. */
3927 int needs_save_res;
3928 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3929 or -1u if no such stub with bctrl exists. */
3930 unsigned int tls_get_addr_opt_bctrl;
3931};
3932
3933struct ppc_stub_hash_entry {
3934
3935 /* Base hash table entry structure. */
3936 struct bfd_hash_entry root;
3937
3938 enum ppc_stub_type stub_type;
3939
3940 /* Group information. */
3941 struct map_stub *group;
3942
3943 /* Offset within stub_sec of the beginning of this stub. */
3944 bfd_vma stub_offset;
3945
3946 /* Given the symbol's value and its section we can determine its final
3947 value when building the stubs (so the stub knows where to jump. */
3948 bfd_vma target_value;
3949 asection *target_section;
3950
3951 /* The symbol table entry, if any, that this was derived from. */
3952 struct ppc_link_hash_entry *h;
3953 struct plt_entry *plt_ent;
3954
3955 /* Symbol st_other. */
3956 unsigned char other;
3957};
3958
3959struct ppc_branch_hash_entry {
3960
3961 /* Base hash table entry structure. */
3962 struct bfd_hash_entry root;
3963
3964 /* Offset within branch lookup table. */
3965 unsigned int offset;
3966
3967 /* Generation marker. */
3968 unsigned int iter;
3969};
3970
3971/* Used to track dynamic relocations for local symbols. */
3972struct ppc_dyn_relocs
3973{
3974 struct ppc_dyn_relocs *next;
3975
3976 /* The input section of the reloc. */
3977 asection *sec;
3978
3979 /* Total number of relocs copied for the input section. */
3980 unsigned int count : 31;
3981
3982 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3983 unsigned int ifunc : 1;
3984};
3985
3986struct ppc_link_hash_entry
3987{
3988 struct elf_link_hash_entry elf;
3989
3990 union {
3991 /* A pointer to the most recently used stub hash entry against this
3992 symbol. */
3993 struct ppc_stub_hash_entry *stub_cache;
3994
3995 /* A pointer to the next symbol starting with a '.' */
3996 struct ppc_link_hash_entry *next_dot_sym;
3997 } u;
3998
3999 /* Track dynamic relocs copied for this symbol. */
4000 struct elf_dyn_relocs *dyn_relocs;
4001
4002 /* Chain of aliases referring to a weakdef. */
4003 struct ppc_link_hash_entry *weakref;
4004
4005 /* Link between function code and descriptor symbols. */
4006 struct ppc_link_hash_entry *oh;
4007
4008 /* Flag function code and descriptor symbols. */
4009 unsigned int is_func:1;
4010 unsigned int is_func_descriptor:1;
4011 unsigned int fake:1;
4012
4013 /* Whether global opd/toc sym has been adjusted or not.
4014 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4015 should be set for all globals defined in any opd/toc section. */
4016 unsigned int adjust_done:1;
4017
4018 /* Set if this is an out-of-line register save/restore function,
4019 with non-standard calling convention. */
4020 unsigned int save_res:1;
4021
4022 /* Set if a duplicate symbol with non-zero localentry is detected,
4023 even when the duplicate symbol does not provide a definition. */
4024 unsigned int non_zero_localentry:1;
4025
4026 /* Contexts in which symbol is used in the GOT (or TOC).
4027 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4028 corresponding relocs are encountered during check_relocs.
4029 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4030 indicate the corresponding GOT entry type is not needed.
4031 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4032 a TPREL one. We use a separate flag rather than setting TPREL
4033 just for convenience in distinguishing the two cases. */
4034#define TLS_GD 1 /* GD reloc. */
4035#define TLS_LD 2 /* LD reloc. */
4036#define TLS_TPREL 4 /* TPREL reloc, => IE. */
4037#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4038#define TLS_TLS 16 /* Any TLS reloc. */
4039#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4040#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4041#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4042 unsigned char tls_mask;
4043};
4044
4045/* ppc64 ELF linker hash table. */
4046
4047struct ppc_link_hash_table
4048{
4049 struct elf_link_hash_table elf;
4050
4051 /* The stub hash table. */
4052 struct bfd_hash_table stub_hash_table;
4053
4054 /* Another hash table for plt_branch stubs. */
4055 struct bfd_hash_table branch_hash_table;
4056
4057 /* Hash table for function prologue tocsave. */
4058 htab_t tocsave_htab;
4059
4060 /* Various options and other info passed from the linker. */
4061 struct ppc64_elf_params *params;
4062
4063 /* The size of sec_info below. */
4064 unsigned int sec_info_arr_size;
4065
4066 /* Per-section array of extra section info. Done this way rather
4067 than as part of ppc64_elf_section_data so we have the info for
4068 non-ppc64 sections. */
4069 struct
4070 {
4071 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4072 bfd_vma toc_off;
4073
4074 union
4075 {
4076 /* The section group that this section belongs to. */
4077 struct map_stub *group;
4078 /* A temp section list pointer. */
4079 asection *list;
4080 } u;
4081 } *sec_info;
4082
4083 /* Linked list of groups. */
4084 struct map_stub *group;
4085
4086 /* Temp used when calculating TOC pointers. */
4087 bfd_vma toc_curr;
4088 bfd *toc_bfd;
4089 asection *toc_first_sec;
4090
4091 /* Used when adding symbols. */
4092 struct ppc_link_hash_entry *dot_syms;
4093
4094 /* Shortcuts to get to dynamic linker sections. */
4095 asection *glink;
4096 asection *sfpr;
4097 asection *brlt;
4098 asection *relbrlt;
4099 asection *glink_eh_frame;
4100
4101 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4102 struct ppc_link_hash_entry *tls_get_addr;
4103 struct ppc_link_hash_entry *tls_get_addr_fd;
4104
4105 /* The size of reliplt used by got entry relocs. */
4106 bfd_size_type got_reli_size;
4107
4108 /* Statistics. */
4109 unsigned long stub_count[ppc_stub_global_entry];
4110
4111 /* Number of stubs against global syms. */
4112 unsigned long stub_globals;
4113
4114 /* Set if we're linking code with function descriptors. */
4115 unsigned int opd_abi:1;
4116
4117 /* Support for multiple toc sections. */
4118 unsigned int do_multi_toc:1;
4119 unsigned int multi_toc_needed:1;
4120 unsigned int second_toc_pass:1;
4121 unsigned int do_toc_opt:1;
4122
4123 /* Set on error. */
4124 unsigned int stub_error:1;
4125
4126 /* Whether func_desc_adjust needs to be run over symbols. */
4127 unsigned int need_func_desc_adj:1;
4128
4129 /* Whether there exist local gnu indirect function resolvers,
4130 referenced by dynamic relocations. */
4131 unsigned int local_ifunc_resolver:1;
4132 unsigned int maybe_local_ifunc_resolver:1;
4133
4134 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4135 unsigned int has_plt_localentry0:1;
4136
4137 /* Incremented every time we size stubs. */
4138 unsigned int stub_iteration;
4139
4140 /* Small local sym cache. */
4141 struct sym_cache sym_cache;
4142};
4143
4144/* Rename some of the generic section flags to better document how they
4145 are used here. */
4146
4147/* Nonzero if this section has TLS related relocations. */
4148#define has_tls_reloc sec_flg0
4149
4150/* Nonzero if this section has a call to __tls_get_addr. */
4151#define has_tls_get_addr_call sec_flg1
4152
4153/* Nonzero if this section has any toc or got relocs. */
4154#define has_toc_reloc sec_flg2
4155
4156/* Nonzero if this section has a call to another section that uses
4157 the toc or got. */
4158#define makes_toc_func_call sec_flg3
4159
4160/* Recursion protection when determining above flag. */
4161#define call_check_in_progress sec_flg4
4162#define call_check_done sec_flg5
4163
4164/* Get the ppc64 ELF linker hash table from a link_info structure. */
4165
4166#define ppc_hash_table(p) \
4167 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4168 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4169
4170#define ppc_stub_hash_lookup(table, string, create, copy) \
4171 ((struct ppc_stub_hash_entry *) \
4172 bfd_hash_lookup ((table), (string), (create), (copy)))
4173
4174#define ppc_branch_hash_lookup(table, string, create, copy) \
4175 ((struct ppc_branch_hash_entry *) \
4176 bfd_hash_lookup ((table), (string), (create), (copy)))
4177
4178/* Create an entry in the stub hash table. */
4179
4180static struct bfd_hash_entry *
4181stub_hash_newfunc (struct bfd_hash_entry *entry,
4182 struct bfd_hash_table *table,
4183 const char *string)
4184{
4185 /* Allocate the structure if it has not already been allocated by a
4186 subclass. */
4187 if (entry == NULL)
4188 {
4189 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4190 if (entry == NULL)
4191 return entry;
4192 }
4193
4194 /* Call the allocation method of the superclass. */
4195 entry = bfd_hash_newfunc (entry, table, string);
4196 if (entry != NULL)
4197 {
4198 struct ppc_stub_hash_entry *eh;
4199
4200 /* Initialize the local fields. */
4201 eh = (struct ppc_stub_hash_entry *) entry;
4202 eh->stub_type = ppc_stub_none;
4203 eh->group = NULL;
4204 eh->stub_offset = 0;
4205 eh->target_value = 0;
4206 eh->target_section = NULL;
4207 eh->h = NULL;
4208 eh->plt_ent = NULL;
4209 eh->other = 0;
4210 }
4211
4212 return entry;
4213}
4214
4215/* Create an entry in the branch hash table. */
4216
4217static struct bfd_hash_entry *
4218branch_hash_newfunc (struct bfd_hash_entry *entry,
4219 struct bfd_hash_table *table,
4220 const char *string)
4221{
4222 /* Allocate the structure if it has not already been allocated by a
4223 subclass. */
4224 if (entry == NULL)
4225 {
4226 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4227 if (entry == NULL)
4228 return entry;
4229 }
4230
4231 /* Call the allocation method of the superclass. */
4232 entry = bfd_hash_newfunc (entry, table, string);
4233 if (entry != NULL)
4234 {
4235 struct ppc_branch_hash_entry *eh;
4236
4237 /* Initialize the local fields. */
4238 eh = (struct ppc_branch_hash_entry *) entry;
4239 eh->offset = 0;
4240 eh->iter = 0;
4241 }
4242
4243 return entry;
4244}
4245
4246/* Create an entry in a ppc64 ELF linker hash table. */
4247
4248static struct bfd_hash_entry *
4249link_hash_newfunc (struct bfd_hash_entry *entry,
4250 struct bfd_hash_table *table,
4251 const char *string)
4252{
4253 /* Allocate the structure if it has not already been allocated by a
4254 subclass. */
4255 if (entry == NULL)
4256 {
4257 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4258 if (entry == NULL)
4259 return entry;
4260 }
4261
4262 /* Call the allocation method of the superclass. */
4263 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4264 if (entry != NULL)
4265 {
4266 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4267
4268 memset (&eh->u.stub_cache, 0,
4269 (sizeof (struct ppc_link_hash_entry)
4270 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4271
4272 /* When making function calls, old ABI code references function entry
4273 points (dot symbols), while new ABI code references the function
4274 descriptor symbol. We need to make any combination of reference and
4275 definition work together, without breaking archive linking.
4276
4277 For a defined function "foo" and an undefined call to "bar":
4278 An old object defines "foo" and ".foo", references ".bar" (possibly
4279 "bar" too).
4280 A new object defines "foo" and references "bar".
4281
4282 A new object thus has no problem with its undefined symbols being
4283 satisfied by definitions in an old object. On the other hand, the
4284 old object won't have ".bar" satisfied by a new object.
4285
4286 Keep a list of newly added dot-symbols. */
4287
4288 if (string[0] == '.')
4289 {
4290 struct ppc_link_hash_table *htab;
4291
4292 htab = (struct ppc_link_hash_table *) table;
4293 eh->u.next_dot_sym = htab->dot_syms;
4294 htab->dot_syms = eh;
4295 }
4296 }
4297
4298 return entry;
4299}
4300
4301struct tocsave_entry {
4302 asection *sec;
4303 bfd_vma offset;
4304};
4305
4306static hashval_t
4307tocsave_htab_hash (const void *p)
4308{
4309 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4310 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4311}
4312
4313static int
4314tocsave_htab_eq (const void *p1, const void *p2)
4315{
4316 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4317 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4318 return e1->sec == e2->sec && e1->offset == e2->offset;
4319}
4320
4321/* Destroy a ppc64 ELF linker hash table. */
4322
4323static void
4324ppc64_elf_link_hash_table_free (bfd *obfd)
4325{
4326 struct ppc_link_hash_table *htab;
4327
4328 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4329 if (htab->tocsave_htab)
4330 htab_delete (htab->tocsave_htab);
4331 bfd_hash_table_free (&htab->branch_hash_table);
4332 bfd_hash_table_free (&htab->stub_hash_table);
4333 _bfd_elf_link_hash_table_free (obfd);
4334}
4335
4336/* Create a ppc64 ELF linker hash table. */
4337
4338static struct bfd_link_hash_table *
4339ppc64_elf_link_hash_table_create (bfd *abfd)
4340{
4341 struct ppc_link_hash_table *htab;
4342 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4343
4344 htab = bfd_zmalloc (amt);
4345 if (htab == NULL)
4346 return NULL;
4347
4348 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4349 sizeof (struct ppc_link_hash_entry),
4350 PPC64_ELF_DATA))
4351 {
4352 free (htab);
4353 return NULL;
4354 }
4355
4356 /* Init the stub hash table too. */
4357 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4358 sizeof (struct ppc_stub_hash_entry)))
4359 {
4360 _bfd_elf_link_hash_table_free (abfd);
4361 return NULL;
4362 }
4363
4364 /* And the branch hash table. */
4365 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4366 sizeof (struct ppc_branch_hash_entry)))
4367 {
4368 bfd_hash_table_free (&htab->stub_hash_table);
4369 _bfd_elf_link_hash_table_free (abfd);
4370 return NULL;
4371 }
4372
4373 htab->tocsave_htab = htab_try_create (1024,
4374 tocsave_htab_hash,
4375 tocsave_htab_eq,
4376 NULL);
4377 if (htab->tocsave_htab == NULL)
4378 {
4379 ppc64_elf_link_hash_table_free (abfd);
4380 return NULL;
4381 }
4382 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4383
4384 /* Initializing two fields of the union is just cosmetic. We really
4385 only care about glist, but when compiled on a 32-bit host the
4386 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4387 debugger inspection of these fields look nicer. */
4388 htab->elf.init_got_refcount.refcount = 0;
4389 htab->elf.init_got_refcount.glist = NULL;
4390 htab->elf.init_plt_refcount.refcount = 0;
4391 htab->elf.init_plt_refcount.glist = NULL;
4392 htab->elf.init_got_offset.offset = 0;
4393 htab->elf.init_got_offset.glist = NULL;
4394 htab->elf.init_plt_offset.offset = 0;
4395 htab->elf.init_plt_offset.glist = NULL;
4396
4397 return &htab->elf.root;
4398}
4399
4400/* Create sections for linker generated code. */
4401
4402static bfd_boolean
4403create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4404{
4405 struct ppc_link_hash_table *htab;
4406 flagword flags;
4407
4408 htab = ppc_hash_table (info);
4409
4410 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4411 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4412 if (htab->params->save_restore_funcs)
4413 {
4414 /* Create .sfpr for code to save and restore fp regs. */
4415 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4416 flags);
4417 if (htab->sfpr == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4419 return FALSE;
4420 }
4421
4422 if (bfd_link_relocatable (info))
4423 return TRUE;
4424
4425 /* Create .glink for lazy dynamic linking support. */
4426 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4427 flags);
4428 if (htab->glink == NULL
4429 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4430 return FALSE;
4431
4432 if (!info->no_ld_generated_unwind_info)
4433 {
4434 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4435 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4436 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4437 ".eh_frame",
4438 flags);
4439 if (htab->glink_eh_frame == NULL
4440 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4441 return FALSE;
4442 }
4443
4444 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4445 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4446 if (htab->elf.iplt == NULL
4447 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4448 return FALSE;
4449
4450 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4451 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4452 htab->elf.irelplt
4453 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4454 if (htab->elf.irelplt == NULL
4455 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4456 return FALSE;
4457
4458 /* Create branch lookup table for plt_branch stubs. */
4459 flags = (SEC_ALLOC | SEC_LOAD
4460 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4461 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4462 flags);
4463 if (htab->brlt == NULL
4464 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4465 return FALSE;
4466
4467 if (!bfd_link_pic (info))
4468 return TRUE;
4469
4470 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4471 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4472 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4473 ".rela.branch_lt",
4474 flags);
4475 if (htab->relbrlt == NULL
4476 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4477 return FALSE;
4478
4479 return TRUE;
4480}
4481
4482/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4483
4484bfd_boolean
4485ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4486 struct ppc64_elf_params *params)
4487{
4488 struct ppc_link_hash_table *htab;
4489
4490 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4491
4492/* Always hook our dynamic sections into the first bfd, which is the
4493 linker created stub bfd. This ensures that the GOT header is at
4494 the start of the output TOC section. */
4495 htab = ppc_hash_table (info);
4496 htab->elf.dynobj = params->stub_bfd;
4497 htab->params = params;
4498
4499 return create_linkage_sections (htab->elf.dynobj, info);
4500}
4501
4502/* Build a name for an entry in the stub hash table. */
4503
4504static char *
4505ppc_stub_name (const asection *input_section,
4506 const asection *sym_sec,
4507 const struct ppc_link_hash_entry *h,
4508 const Elf_Internal_Rela *rel)
4509{
4510 char *stub_name;
4511 ssize_t len;
4512
4513 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4514 offsets from a sym as a branch target? In fact, we could
4515 probably assume the addend is always zero. */
4516 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4517
4518 if (h)
4519 {
4520 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4521 stub_name = bfd_malloc (len);
4522 if (stub_name == NULL)
4523 return stub_name;
4524
4525 len = sprintf (stub_name, "%08x.%s+%x",
4526 input_section->id & 0xffffffff,
4527 h->elf.root.root.string,
4528 (int) rel->r_addend & 0xffffffff);
4529 }
4530 else
4531 {
4532 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4533 stub_name = bfd_malloc (len);
4534 if (stub_name == NULL)
4535 return stub_name;
4536
4537 len = sprintf (stub_name, "%08x.%x:%x+%x",
4538 input_section->id & 0xffffffff,
4539 sym_sec->id & 0xffffffff,
4540 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4541 (int) rel->r_addend & 0xffffffff);
4542 }
4543 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4544 stub_name[len - 2] = 0;
4545 return stub_name;
4546}
4547
4548/* Look up an entry in the stub hash. Stub entries are cached because
4549 creating the stub name takes a bit of time. */
4550
4551static struct ppc_stub_hash_entry *
4552ppc_get_stub_entry (const asection *input_section,
4553 const asection *sym_sec,
4554 struct ppc_link_hash_entry *h,
4555 const Elf_Internal_Rela *rel,
4556 struct ppc_link_hash_table *htab)
4557{
4558 struct ppc_stub_hash_entry *stub_entry;
4559 struct map_stub *group;
4560
4561 /* If this input section is part of a group of sections sharing one
4562 stub section, then use the id of the first section in the group.
4563 Stub names need to include a section id, as there may well be
4564 more than one stub used to reach say, printf, and we need to
4565 distinguish between them. */
4566 group = htab->sec_info[input_section->id].u.group;
4567 if (group == NULL)
4568 return NULL;
4569
4570 if (h != NULL && h->u.stub_cache != NULL
4571 && h->u.stub_cache->h == h
4572 && h->u.stub_cache->group == group)
4573 {
4574 stub_entry = h->u.stub_cache;
4575 }
4576 else
4577 {
4578 char *stub_name;
4579
4580 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4581 if (stub_name == NULL)
4582 return NULL;
4583
4584 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4585 stub_name, FALSE, FALSE);
4586 if (h != NULL)
4587 h->u.stub_cache = stub_entry;
4588
4589 free (stub_name);
4590 }
4591
4592 return stub_entry;
4593}
4594
4595/* Add a new stub entry to the stub hash. Not all fields of the new
4596 stub entry are initialised. */
4597
4598static struct ppc_stub_hash_entry *
4599ppc_add_stub (const char *stub_name,
4600 asection *section,
4601 struct bfd_link_info *info)
4602{
4603 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4604 struct map_stub *group;
4605 asection *link_sec;
4606 asection *stub_sec;
4607 struct ppc_stub_hash_entry *stub_entry;
4608
4609 group = htab->sec_info[section->id].u.group;
4610 link_sec = group->link_sec;
4611 stub_sec = group->stub_sec;
4612 if (stub_sec == NULL)
4613 {
4614 size_t namelen;
4615 bfd_size_type len;
4616 char *s_name;
4617
4618 namelen = strlen (link_sec->name);
4619 len = namelen + sizeof (STUB_SUFFIX);
4620 s_name = bfd_alloc (htab->params->stub_bfd, len);
4621 if (s_name == NULL)
4622 return NULL;
4623
4624 memcpy (s_name, link_sec->name, namelen);
4625 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4626 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4627 if (stub_sec == NULL)
4628 return NULL;
4629 group->stub_sec = stub_sec;
4630 }
4631
4632 /* Enter this entry into the linker stub hash table. */
4633 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4634 TRUE, FALSE);
4635 if (stub_entry == NULL)
4636 {
4637 /* xgettext:c-format */
4638 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4639 section->owner, stub_name);
4640 return NULL;
4641 }
4642
4643 stub_entry->group = group;
4644 stub_entry->stub_offset = 0;
4645 return stub_entry;
4646}
4647
4648/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4649 not already done. */
4650
4651static bfd_boolean
4652create_got_section (bfd *abfd, struct bfd_link_info *info)
4653{
4654 asection *got, *relgot;
4655 flagword flags;
4656 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4657
4658 if (!is_ppc64_elf (abfd))
4659 return FALSE;
4660 if (htab == NULL)
4661 return FALSE;
4662
4663 if (!htab->elf.sgot
4664 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4665 return FALSE;
4666
4667 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4668 | SEC_LINKER_CREATED);
4669
4670 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4671 if (!got
4672 || !bfd_set_section_alignment (abfd, got, 3))
4673 return FALSE;
4674
4675 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4676 flags | SEC_READONLY);
4677 if (!relgot
4678 || ! bfd_set_section_alignment (abfd, relgot, 3))
4679 return FALSE;
4680
4681 ppc64_elf_tdata (abfd)->got = got;
4682 ppc64_elf_tdata (abfd)->relgot = relgot;
4683 return TRUE;
4684}
4685
4686/* Follow indirect and warning symbol links. */
4687
4688static inline struct bfd_link_hash_entry *
4689follow_link (struct bfd_link_hash_entry *h)
4690{
4691 while (h->type == bfd_link_hash_indirect
4692 || h->type == bfd_link_hash_warning)
4693 h = h->u.i.link;
4694 return h;
4695}
4696
4697static inline struct elf_link_hash_entry *
4698elf_follow_link (struct elf_link_hash_entry *h)
4699{
4700 return (struct elf_link_hash_entry *) follow_link (&h->root);
4701}
4702
4703static inline struct ppc_link_hash_entry *
4704ppc_follow_link (struct ppc_link_hash_entry *h)
4705{
4706 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4707}
4708
4709/* Merge PLT info on FROM with that on TO. */
4710
4711static void
4712move_plt_plist (struct ppc_link_hash_entry *from,
4713 struct ppc_link_hash_entry *to)
4714{
4715 if (from->elf.plt.plist != NULL)
4716 {
4717 if (to->elf.plt.plist != NULL)
4718 {
4719 struct plt_entry **entp;
4720 struct plt_entry *ent;
4721
4722 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4723 {
4724 struct plt_entry *dent;
4725
4726 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4727 if (dent->addend == ent->addend)
4728 {
4729 dent->plt.refcount += ent->plt.refcount;
4730 *entp = ent->next;
4731 break;
4732 }
4733 if (dent == NULL)
4734 entp = &ent->next;
4735 }
4736 *entp = to->elf.plt.plist;
4737 }
4738
4739 to->elf.plt.plist = from->elf.plt.plist;
4740 from->elf.plt.plist = NULL;
4741 }
4742}
4743
4744/* Copy the extra info we tack onto an elf_link_hash_entry. */
4745
4746static void
4747ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4748 struct elf_link_hash_entry *dir,
4749 struct elf_link_hash_entry *ind)
4750{
4751 struct ppc_link_hash_entry *edir, *eind;
4752
4753 edir = (struct ppc_link_hash_entry *) dir;
4754 eind = (struct ppc_link_hash_entry *) ind;
4755
4756 edir->is_func |= eind->is_func;
4757 edir->is_func_descriptor |= eind->is_func_descriptor;
4758 edir->tls_mask |= eind->tls_mask;
4759 if (eind->oh != NULL)
4760 edir->oh = ppc_follow_link (eind->oh);
4761
4762 /* If called to transfer flags for a weakdef during processing
4763 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4764 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4765 if (!(ELIMINATE_COPY_RELOCS
4766 && eind->elf.root.type != bfd_link_hash_indirect
4767 && edir->elf.dynamic_adjusted))
4768 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4769
4770 if (edir->elf.versioned != versioned_hidden)
4771 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4772 edir->elf.ref_regular |= eind->elf.ref_regular;
4773 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4774 edir->elf.needs_plt |= eind->elf.needs_plt;
4775 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4776
4777 /* If we were called to copy over info for a weak sym, don't copy
4778 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4779 in order to simplify readonly_dynrelocs and save a field in the
4780 symbol hash entry, but that means dyn_relocs can't be used in any
4781 tests about a specific symbol, or affect other symbol flags which
4782 are then tested.
4783 Chain weakdefs so we can get from the weakdef back to an alias.
4784 The list is circular so that we don't need to use u.weakdef as
4785 well as this list to look at all aliases. */
4786 if (eind->elf.root.type != bfd_link_hash_indirect)
4787 {
4788 struct ppc_link_hash_entry *cur, *add, *next;
4789
4790 add = eind;
4791 do
4792 {
4793 cur = edir->weakref;
4794 if (cur != NULL)
4795 {
4796 do
4797 {
4798 /* We can be called twice for the same symbols.
4799 Don't make multiple loops. */
4800 if (cur == add)
4801 return;
4802 cur = cur->weakref;
4803 } while (cur != edir);
4804 }
4805 next = add->weakref;
4806 if (cur != add)
4807 {
4808 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4809 edir->weakref = add;
4810 }
4811 add = next;
4812 } while (add != NULL && add != eind);
4813 return;
4814 }
4815
4816 /* Copy over any dynamic relocs we may have on the indirect sym. */
4817 if (eind->dyn_relocs != NULL)
4818 {
4819 if (edir->dyn_relocs != NULL)
4820 {
4821 struct elf_dyn_relocs **pp;
4822 struct elf_dyn_relocs *p;
4823
4824 /* Add reloc counts against the indirect sym to the direct sym
4825 list. Merge any entries against the same section. */
4826 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4827 {
4828 struct elf_dyn_relocs *q;
4829
4830 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4831 if (q->sec == p->sec)
4832 {
4833 q->pc_count += p->pc_count;
4834 q->count += p->count;
4835 *pp = p->next;
4836 break;
4837 }
4838 if (q == NULL)
4839 pp = &p->next;
4840 }
4841 *pp = edir->dyn_relocs;
4842 }
4843
4844 edir->dyn_relocs = eind->dyn_relocs;
4845 eind->dyn_relocs = NULL;
4846 }
4847
4848 /* Copy over got entries that we may have already seen to the
4849 symbol which just became indirect. */
4850 if (eind->elf.got.glist != NULL)
4851 {
4852 if (edir->elf.got.glist != NULL)
4853 {
4854 struct got_entry **entp;
4855 struct got_entry *ent;
4856
4857 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4858 {
4859 struct got_entry *dent;
4860
4861 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4862 if (dent->addend == ent->addend
4863 && dent->owner == ent->owner
4864 && dent->tls_type == ent->tls_type)
4865 {
4866 dent->got.refcount += ent->got.refcount;
4867 *entp = ent->next;
4868 break;
4869 }
4870 if (dent == NULL)
4871 entp = &ent->next;
4872 }
4873 *entp = edir->elf.got.glist;
4874 }
4875
4876 edir->elf.got.glist = eind->elf.got.glist;
4877 eind->elf.got.glist = NULL;
4878 }
4879
4880 /* And plt entries. */
4881 move_plt_plist (eind, edir);
4882
4883 if (eind->elf.dynindx != -1)
4884 {
4885 if (edir->elf.dynindx != -1)
4886 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4887 edir->elf.dynstr_index);
4888 edir->elf.dynindx = eind->elf.dynindx;
4889 edir->elf.dynstr_index = eind->elf.dynstr_index;
4890 eind->elf.dynindx = -1;
4891 eind->elf.dynstr_index = 0;
4892 }
4893}
4894
4895/* Find the function descriptor hash entry from the given function code
4896 hash entry FH. Link the entries via their OH fields. */
4897
4898static struct ppc_link_hash_entry *
4899lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4900{
4901 struct ppc_link_hash_entry *fdh = fh->oh;
4902
4903 if (fdh == NULL)
4904 {
4905 const char *fd_name = fh->elf.root.root.string + 1;
4906
4907 fdh = (struct ppc_link_hash_entry *)
4908 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4909 if (fdh == NULL)
4910 return fdh;
4911
4912 fdh->is_func_descriptor = 1;
4913 fdh->oh = fh;
4914 fh->is_func = 1;
4915 fh->oh = fdh;
4916 }
4917
4918 fdh = ppc_follow_link (fdh);
4919 fdh->is_func_descriptor = 1;
4920 fdh->oh = fh;
4921 return fdh;
4922}
4923
4924/* Make a fake function descriptor sym for the undefined code sym FH. */
4925
4926static struct ppc_link_hash_entry *
4927make_fdh (struct bfd_link_info *info,
4928 struct ppc_link_hash_entry *fh)
4929{
4930 bfd *abfd = fh->elf.root.u.undef.abfd;
4931 struct bfd_link_hash_entry *bh = NULL;
4932 struct ppc_link_hash_entry *fdh;
4933 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4934 ? BSF_WEAK
4935 : BSF_GLOBAL);
4936
4937 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4938 fh->elf.root.root.string + 1,
4939 flags, bfd_und_section_ptr, 0,
4940 NULL, FALSE, FALSE, &bh))
4941 return NULL;
4942
4943 fdh = (struct ppc_link_hash_entry *) bh;
4944 fdh->elf.non_elf = 0;
4945 fdh->fake = 1;
4946 fdh->is_func_descriptor = 1;
4947 fdh->oh = fh;
4948 fh->is_func = 1;
4949 fh->oh = fdh;
4950 return fdh;
4951}
4952
4953/* Fix function descriptor symbols defined in .opd sections to be
4954 function type. */
4955
4956static bfd_boolean
4957ppc64_elf_add_symbol_hook (bfd *ibfd,
4958 struct bfd_link_info *info,
4959 Elf_Internal_Sym *isym,
4960 const char **name,
4961 flagword *flags ATTRIBUTE_UNUSED,
4962 asection **sec,
4963 bfd_vma *value)
4964{
4965 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4966 && (ibfd->flags & DYNAMIC) == 0
4967 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4968 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4969
4970 if (*sec != NULL
4971 && strcmp ((*sec)->name, ".opd") == 0)
4972 {
4973 asection *code_sec;
4974
4975 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4976 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4977 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4978
4979 /* If the symbol is a function defined in .opd, and the function
4980 code is in a discarded group, let it appear to be undefined. */
4981 if (!bfd_link_relocatable (info)
4982 && (*sec)->reloc_count != 0
4983 && opd_entry_value (*sec, *value, &code_sec, NULL,
4984 FALSE) != (bfd_vma) -1
4985 && discarded_section (code_sec))
4986 {
4987 *sec = bfd_und_section_ptr;
4988 isym->st_shndx = SHN_UNDEF;
4989 }
4990 }
4991 else if (*sec != NULL
4992 && strcmp ((*sec)->name, ".toc") == 0
4993 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4994 {
4995 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4996 if (htab != NULL)
4997 htab->params->object_in_toc = 1;
4998 }
4999
5000 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5001 {
5002 if (abiversion (ibfd) == 0)
5003 set_abiversion (ibfd, 2);
5004 else if (abiversion (ibfd) == 1)
5005 {
5006 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5007 " for ABI version 1\n"), name);
5008 bfd_set_error (bfd_error_bad_value);
5009 return FALSE;
5010 }
5011 }
5012
5013 return TRUE;
5014}
5015
5016/* Merge non-visibility st_other attributes: local entry point. */
5017
5018static void
5019ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5020 const Elf_Internal_Sym *isym,
5021 bfd_boolean definition,
5022 bfd_boolean dynamic)
5023{
5024 if (definition && (!dynamic || !h->def_regular))
5025 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5026 | ELF_ST_VISIBILITY (h->other));
5027}
5028
5029/* Hook called on merging a symbol. We use this to clear "fake" since
5030 we now have a real symbol. */
5031
5032static bfd_boolean
5033ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5034 const Elf_Internal_Sym *isym,
5035 asection **psec ATTRIBUTE_UNUSED,
5036 bfd_boolean newdef ATTRIBUTE_UNUSED,
5037 bfd_boolean olddef ATTRIBUTE_UNUSED,
5038 bfd *oldbfd ATTRIBUTE_UNUSED,
5039 const asection *oldsec ATTRIBUTE_UNUSED)
5040{
5041 ((struct ppc_link_hash_entry *) h)->fake = 0;
5042 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5043 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5044 return TRUE;
5045}
5046
5047/* This function makes an old ABI object reference to ".bar" cause the
5048 inclusion of a new ABI object archive that defines "bar".
5049 NAME is a symbol defined in an archive. Return a symbol in the hash
5050 table that might be satisfied by the archive symbols. */
5051
5052static struct elf_link_hash_entry *
5053ppc64_elf_archive_symbol_lookup (bfd *abfd,
5054 struct bfd_link_info *info,
5055 const char *name)
5056{
5057 struct elf_link_hash_entry *h;
5058 char *dot_name;
5059 size_t len;
5060
5061 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5062 if (h != NULL
5063 /* Don't return this sym if it is a fake function descriptor
5064 created by add_symbol_adjust. */
5065 && !((struct ppc_link_hash_entry *) h)->fake)
5066 return h;
5067
5068 if (name[0] == '.')
5069 return h;
5070
5071 len = strlen (name);
5072 dot_name = bfd_alloc (abfd, len + 2);
5073 if (dot_name == NULL)
5074 return (struct elf_link_hash_entry *) 0 - 1;
5075 dot_name[0] = '.';
5076 memcpy (dot_name + 1, name, len + 1);
5077 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5078 bfd_release (abfd, dot_name);
5079 return h;
5080}
5081
5082/* This function satisfies all old ABI object references to ".bar" if a
5083 new ABI object defines "bar". Well, at least, undefined dot symbols
5084 are made weak. This stops later archive searches from including an
5085 object if we already have a function descriptor definition. It also
5086 prevents the linker complaining about undefined symbols.
5087 We also check and correct mismatched symbol visibility here. The
5088 most restrictive visibility of the function descriptor and the
5089 function entry symbol is used. */
5090
5091static bfd_boolean
5092add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5093{
5094 struct ppc_link_hash_table *htab;
5095 struct ppc_link_hash_entry *fdh;
5096
5097 if (eh->elf.root.type == bfd_link_hash_warning)
5098 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5099
5100 if (eh->elf.root.type == bfd_link_hash_indirect)
5101 return TRUE;
5102
5103 if (eh->elf.root.root.string[0] != '.')
5104 abort ();
5105
5106 htab = ppc_hash_table (info);
5107 if (htab == NULL)
5108 return FALSE;
5109
5110 fdh = lookup_fdh (eh, htab);
5111 if (fdh == NULL
5112 && !bfd_link_relocatable (info)
5113 && (eh->elf.root.type == bfd_link_hash_undefined
5114 || eh->elf.root.type == bfd_link_hash_undefweak)
5115 && eh->elf.ref_regular)
5116 {
5117 /* Make an undefined function descriptor sym, in order to
5118 pull in an --as-needed shared lib. Archives are handled
5119 elsewhere. */
5120 fdh = make_fdh (info, eh);
5121 if (fdh == NULL)
5122 return FALSE;
5123 }
5124
5125 if (fdh != NULL)
5126 {
5127 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5128 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5129
5130 /* Make both descriptor and entry symbol have the most
5131 constraining visibility of either symbol. */
5132 if (entry_vis < descr_vis)
5133 fdh->elf.other += entry_vis - descr_vis;
5134 else if (entry_vis > descr_vis)
5135 eh->elf.other += descr_vis - entry_vis;
5136
5137 /* Propagate reference flags from entry symbol to function
5138 descriptor symbol. */
5139 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5140 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5141 fdh->elf.ref_regular |= eh->elf.ref_regular;
5142 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5143
5144 if (!fdh->elf.forced_local
5145 && fdh->elf.dynindx == -1
5146 && fdh->elf.versioned != versioned_hidden
5147 && (bfd_link_dll (info)
5148 || fdh->elf.def_dynamic
5149 || fdh->elf.ref_dynamic)
5150 && (eh->elf.ref_regular
5151 || eh->elf.def_regular))
5152 {
5153 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5154 return FALSE;
5155 }
5156 }
5157
5158 return TRUE;
5159}
5160
5161/* Set up opd section info and abiversion for IBFD, and process list
5162 of dot-symbols we made in link_hash_newfunc. */
5163
5164static bfd_boolean
5165ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5166{
5167 struct ppc_link_hash_table *htab;
5168 struct ppc_link_hash_entry **p, *eh;
5169 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5170
5171 if (opd != NULL && opd->size != 0)
5172 {
5173 if (abiversion (ibfd) == 0)
5174 set_abiversion (ibfd, 1);
5175 else if (abiversion (ibfd) >= 2)
5176 {
5177 /* xgettext:c-format */
5178 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5179 " version %d\n"),
5180 ibfd, abiversion (ibfd));
5181 bfd_set_error (bfd_error_bad_value);
5182 return FALSE;
5183 }
5184
5185 if ((ibfd->flags & DYNAMIC) == 0
5186 && (opd->flags & SEC_RELOC) != 0
5187 && opd->reloc_count != 0
5188 && !bfd_is_abs_section (opd->output_section))
5189 {
5190 /* Garbage collection needs some extra help with .opd sections.
5191 We don't want to necessarily keep everything referenced by
5192 relocs in .opd, as that would keep all functions. Instead,
5193 if we reference an .opd symbol (a function descriptor), we
5194 want to keep the function code symbol's section. This is
5195 easy for global symbols, but for local syms we need to keep
5196 information about the associated function section. */
5197 bfd_size_type amt;
5198 asection **opd_sym_map;
5199
5200 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5201 opd_sym_map = bfd_zalloc (ibfd, amt);
5202 if (opd_sym_map == NULL)
5203 return FALSE;
5204 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5205 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5206 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5207 }
5208 }
5209
5210 if (!is_ppc64_elf (info->output_bfd))
5211 return TRUE;
5212 htab = ppc_hash_table (info);
5213 if (htab == NULL)
5214 return FALSE;
5215
5216 /* For input files without an explicit abiversion in e_flags
5217 we should have flagged any with symbol st_other bits set
5218 as ELFv1 and above flagged those with .opd as ELFv2.
5219 Set the output abiversion if not yet set, and for any input
5220 still ambiguous, take its abiversion from the output.
5221 Differences in ABI are reported later. */
5222 if (abiversion (info->output_bfd) == 0)
5223 set_abiversion (info->output_bfd, abiversion (ibfd));
5224 else if (abiversion (ibfd) == 0)
5225 set_abiversion (ibfd, abiversion (info->output_bfd));
5226
5227 p = &htab->dot_syms;
5228 while ((eh = *p) != NULL)
5229 {
5230 *p = NULL;
5231 if (&eh->elf == htab->elf.hgot)
5232 ;
5233 else if (htab->elf.hgot == NULL
5234 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5235 htab->elf.hgot = &eh->elf;
5236 else if (abiversion (ibfd) <= 1)
5237 {
5238 htab->need_func_desc_adj = 1;
5239 if (!add_symbol_adjust (eh, info))
5240 return FALSE;
5241 }
5242 p = &eh->u.next_dot_sym;
5243 }
5244 return TRUE;
5245}
5246
5247/* Undo hash table changes when an --as-needed input file is determined
5248 not to be needed. */
5249
5250static bfd_boolean
5251ppc64_elf_notice_as_needed (bfd *ibfd,
5252 struct bfd_link_info *info,
5253 enum notice_asneeded_action act)
5254{
5255 if (act == notice_not_needed)
5256 {
5257 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5258
5259 if (htab == NULL)
5260 return FALSE;
5261
5262 htab->dot_syms = NULL;
5263 }
5264 return _bfd_elf_notice_as_needed (ibfd, info, act);
5265}
5266
5267/* If --just-symbols against a final linked binary, then assume we need
5268 toc adjusting stubs when calling functions defined there. */
5269
5270static void
5271ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5272{
5273 if ((sec->flags & SEC_CODE) != 0
5274 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5275 && is_ppc64_elf (sec->owner))
5276 {
5277 if (abiversion (sec->owner) >= 2
5278 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5279 sec->has_toc_reloc = 1;
5280 }
5281 _bfd_elf_link_just_syms (sec, info);
5282}
5283
5284static struct plt_entry **
5285update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5286 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5287{
5288 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5289 struct plt_entry **local_plt;
5290 unsigned char *local_got_tls_masks;
5291
5292 if (local_got_ents == NULL)
5293 {
5294 bfd_size_type size = symtab_hdr->sh_info;
5295
5296 size *= (sizeof (*local_got_ents)
5297 + sizeof (*local_plt)
5298 + sizeof (*local_got_tls_masks));
5299 local_got_ents = bfd_zalloc (abfd, size);
5300 if (local_got_ents == NULL)
5301 return NULL;
5302 elf_local_got_ents (abfd) = local_got_ents;
5303 }
5304
5305 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5306 {
5307 struct got_entry *ent;
5308
5309 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5310 if (ent->addend == r_addend
5311 && ent->owner == abfd
5312 && ent->tls_type == tls_type)
5313 break;
5314 if (ent == NULL)
5315 {
5316 bfd_size_type amt = sizeof (*ent);
5317 ent = bfd_alloc (abfd, amt);
5318 if (ent == NULL)
5319 return FALSE;
5320 ent->next = local_got_ents[r_symndx];
5321 ent->addend = r_addend;
5322 ent->owner = abfd;
5323 ent->tls_type = tls_type;
5324 ent->is_indirect = FALSE;
5325 ent->got.refcount = 0;
5326 local_got_ents[r_symndx] = ent;
5327 }
5328 ent->got.refcount += 1;
5329 }
5330
5331 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5332 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5333 local_got_tls_masks[r_symndx] |= tls_type;
5334
5335 return local_plt + r_symndx;
5336}
5337
5338static bfd_boolean
5339update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5340{
5341 struct plt_entry *ent;
5342
5343 for (ent = *plist; ent != NULL; ent = ent->next)
5344 if (ent->addend == addend)
5345 break;
5346 if (ent == NULL)
5347 {
5348 bfd_size_type amt = sizeof (*ent);
5349 ent = bfd_alloc (abfd, amt);
5350 if (ent == NULL)
5351 return FALSE;
5352 ent->next = *plist;
5353 ent->addend = addend;
5354 ent->plt.refcount = 0;
5355 *plist = ent;
5356 }
5357 ent->plt.refcount += 1;
5358 return TRUE;
5359}
5360
5361static bfd_boolean
5362is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5363{
5364 return (r_type == R_PPC64_REL24
5365 || r_type == R_PPC64_REL14
5366 || r_type == R_PPC64_REL14_BRTAKEN
5367 || r_type == R_PPC64_REL14_BRNTAKEN
5368 || r_type == R_PPC64_ADDR24
5369 || r_type == R_PPC64_ADDR14
5370 || r_type == R_PPC64_ADDR14_BRTAKEN
5371 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5372}
5373
5374/* Look through the relocs for a section during the first phase, and
5375 calculate needed space in the global offset table, procedure
5376 linkage table, and dynamic reloc sections. */
5377
5378static bfd_boolean
5379ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5380 asection *sec, const Elf_Internal_Rela *relocs)
5381{
5382 struct ppc_link_hash_table *htab;
5383 Elf_Internal_Shdr *symtab_hdr;
5384 struct elf_link_hash_entry **sym_hashes;
5385 const Elf_Internal_Rela *rel;
5386 const Elf_Internal_Rela *rel_end;
5387 asection *sreloc;
5388 asection **opd_sym_map;
5389 struct elf_link_hash_entry *tga, *dottga;
5390
5391 if (bfd_link_relocatable (info))
5392 return TRUE;
5393
5394 /* Don't do anything special with non-loaded, non-alloced sections.
5395 In particular, any relocs in such sections should not affect GOT
5396 and PLT reference counting (ie. we don't allow them to create GOT
5397 or PLT entries), there's no possibility or desire to optimize TLS
5398 relocs, and there's not much point in propagating relocs to shared
5399 libs that the dynamic linker won't relocate. */
5400 if ((sec->flags & SEC_ALLOC) == 0)
5401 return TRUE;
5402
5403 BFD_ASSERT (is_ppc64_elf (abfd));
5404
5405 htab = ppc_hash_table (info);
5406 if (htab == NULL)
5407 return FALSE;
5408
5409 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5410 FALSE, FALSE, TRUE);
5411 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5412 FALSE, FALSE, TRUE);
5413 symtab_hdr = &elf_symtab_hdr (abfd);
5414 sym_hashes = elf_sym_hashes (abfd);
5415 sreloc = NULL;
5416 opd_sym_map = NULL;
5417 if (ppc64_elf_section_data (sec) != NULL
5418 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5419 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5420
5421 rel_end = relocs + sec->reloc_count;
5422 for (rel = relocs; rel < rel_end; rel++)
5423 {
5424 unsigned long r_symndx;
5425 struct elf_link_hash_entry *h;
5426 enum elf_ppc64_reloc_type r_type;
5427 int tls_type;
5428 struct _ppc64_elf_section_data *ppc64_sec;
5429 struct plt_entry **ifunc, **plt_list;
5430
5431 r_symndx = ELF64_R_SYM (rel->r_info);
5432 if (r_symndx < symtab_hdr->sh_info)
5433 h = NULL;
5434 else
5435 {
5436 struct ppc_link_hash_entry *eh;
5437
5438 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5439 h = elf_follow_link (h);
5440 eh = (struct ppc_link_hash_entry *) h;
5441
5442 /* PR15323, ref flags aren't set for references in the same
5443 object. */
5444 h->root.non_ir_ref_regular = 1;
5445 if (eh->is_func && eh->oh != NULL)
5446 eh->oh->elf.root.non_ir_ref_regular = 1;
5447
5448 if (h == htab->elf.hgot)
5449 sec->has_toc_reloc = 1;
5450 }
5451
5452 tls_type = 0;
5453 ifunc = NULL;
5454 if (h != NULL)
5455 {
5456 if (h->type == STT_GNU_IFUNC)
5457 {
5458 h->needs_plt = 1;
5459 ifunc = &h->plt.plist;
5460 }
5461 }
5462 else
5463 {
5464 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5465 abfd, r_symndx);
5466 if (isym == NULL)
5467 return FALSE;
5468
5469 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5470 {
5471 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5472 rel->r_addend, PLT_IFUNC);
5473 if (ifunc == NULL)
5474 return FALSE;
5475 }
5476 }
5477
5478 r_type = ELF64_R_TYPE (rel->r_info);
5479 switch (r_type)
5480 {
5481 case R_PPC64_TLSGD:
5482 case R_PPC64_TLSLD:
5483 /* These special tls relocs tie a call to __tls_get_addr with
5484 its parameter symbol. */
5485 break;
5486
5487 case R_PPC64_GOT_TLSLD16:
5488 case R_PPC64_GOT_TLSLD16_LO:
5489 case R_PPC64_GOT_TLSLD16_HI:
5490 case R_PPC64_GOT_TLSLD16_HA:
5491 tls_type = TLS_TLS | TLS_LD;
5492 goto dogottls;
5493
5494 case R_PPC64_GOT_TLSGD16:
5495 case R_PPC64_GOT_TLSGD16_LO:
5496 case R_PPC64_GOT_TLSGD16_HI:
5497 case R_PPC64_GOT_TLSGD16_HA:
5498 tls_type = TLS_TLS | TLS_GD;
5499 goto dogottls;
5500
5501 case R_PPC64_GOT_TPREL16_DS:
5502 case R_PPC64_GOT_TPREL16_LO_DS:
5503 case R_PPC64_GOT_TPREL16_HI:
5504 case R_PPC64_GOT_TPREL16_HA:
5505 if (bfd_link_dll (info))
5506 info->flags |= DF_STATIC_TLS;
5507 tls_type = TLS_TLS | TLS_TPREL;
5508 goto dogottls;
5509
5510 case R_PPC64_GOT_DTPREL16_DS:
5511 case R_PPC64_GOT_DTPREL16_LO_DS:
5512 case R_PPC64_GOT_DTPREL16_HI:
5513 case R_PPC64_GOT_DTPREL16_HA:
5514 tls_type = TLS_TLS | TLS_DTPREL;
5515 dogottls:
5516 sec->has_tls_reloc = 1;
5517 /* Fall through */
5518
5519 case R_PPC64_GOT16:
5520 case R_PPC64_GOT16_DS:
5521 case R_PPC64_GOT16_HA:
5522 case R_PPC64_GOT16_HI:
5523 case R_PPC64_GOT16_LO:
5524 case R_PPC64_GOT16_LO_DS:
5525 /* This symbol requires a global offset table entry. */
5526 sec->has_toc_reloc = 1;
5527 if (r_type == R_PPC64_GOT_TLSLD16
5528 || r_type == R_PPC64_GOT_TLSGD16
5529 || r_type == R_PPC64_GOT_TPREL16_DS
5530 || r_type == R_PPC64_GOT_DTPREL16_DS
5531 || r_type == R_PPC64_GOT16
5532 || r_type == R_PPC64_GOT16_DS)
5533 {
5534 htab->do_multi_toc = 1;
5535 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5536 }
5537
5538 if (ppc64_elf_tdata (abfd)->got == NULL
5539 && !create_got_section (abfd, info))
5540 return FALSE;
5541
5542 if (h != NULL)
5543 {
5544 struct ppc_link_hash_entry *eh;
5545 struct got_entry *ent;
5546
5547 eh = (struct ppc_link_hash_entry *) h;
5548 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5549 if (ent->addend == rel->r_addend
5550 && ent->owner == abfd
5551 && ent->tls_type == tls_type)
5552 break;
5553 if (ent == NULL)
5554 {
5555 bfd_size_type amt = sizeof (*ent);
5556 ent = bfd_alloc (abfd, amt);
5557 if (ent == NULL)
5558 return FALSE;
5559 ent->next = eh->elf.got.glist;
5560 ent->addend = rel->r_addend;
5561 ent->owner = abfd;
5562 ent->tls_type = tls_type;
5563 ent->is_indirect = FALSE;
5564 ent->got.refcount = 0;
5565 eh->elf.got.glist = ent;
5566 }
5567 ent->got.refcount += 1;
5568 eh->tls_mask |= tls_type;
5569 }
5570 else
5571 /* This is a global offset table entry for a local symbol. */
5572 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5573 rel->r_addend, tls_type))
5574 return FALSE;
5575
5576 /* We may also need a plt entry if the symbol turns out to be
5577 an ifunc. */
5578 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5579 {
5580 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5581 return FALSE;
5582 }
5583 break;
5584
5585 case R_PPC64_PLT16_HA:
5586 case R_PPC64_PLT16_HI:
5587 case R_PPC64_PLT16_LO:
5588 case R_PPC64_PLT32:
5589 case R_PPC64_PLT64:
5590 /* This symbol requires a procedure linkage table entry. */
5591 plt_list = ifunc;
5592 if (h != NULL)
5593 {
5594 h->needs_plt = 1;
5595 if (h->root.root.string[0] == '.'
5596 && h->root.root.string[1] != '\0')
5597 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5598 plt_list = &h->plt.plist;
5599 }
5600 if (plt_list == NULL)
5601 {
5602 /* It does not make sense to have a procedure linkage
5603 table entry for a non-ifunc local symbol. */
5604 info->callbacks->einfo
5605 /* xgettext:c-format */
5606 (_("%H: %s reloc against local symbol\n"),
5607 abfd, sec, rel->r_offset,
5608 ppc64_elf_howto_table[r_type]->name);
5609 bfd_set_error (bfd_error_bad_value);
5610 return FALSE;
5611 }
5612 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5613 return FALSE;
5614 break;
5615
5616 /* The following relocations don't need to propagate the
5617 relocation if linking a shared object since they are
5618 section relative. */
5619 case R_PPC64_SECTOFF:
5620 case R_PPC64_SECTOFF_LO:
5621 case R_PPC64_SECTOFF_HI:
5622 case R_PPC64_SECTOFF_HA:
5623 case R_PPC64_SECTOFF_DS:
5624 case R_PPC64_SECTOFF_LO_DS:
5625 case R_PPC64_DTPREL16:
5626 case R_PPC64_DTPREL16_LO:
5627 case R_PPC64_DTPREL16_HI:
5628 case R_PPC64_DTPREL16_HA:
5629 case R_PPC64_DTPREL16_DS:
5630 case R_PPC64_DTPREL16_LO_DS:
5631 case R_PPC64_DTPREL16_HIGH:
5632 case R_PPC64_DTPREL16_HIGHA:
5633 case R_PPC64_DTPREL16_HIGHER:
5634 case R_PPC64_DTPREL16_HIGHERA:
5635 case R_PPC64_DTPREL16_HIGHEST:
5636 case R_PPC64_DTPREL16_HIGHESTA:
5637 break;
5638
5639 /* Nor do these. */
5640 case R_PPC64_REL16:
5641 case R_PPC64_REL16_LO:
5642 case R_PPC64_REL16_HI:
5643 case R_PPC64_REL16_HA:
5644 case R_PPC64_REL16DX_HA:
5645 break;
5646
5647 /* Not supported as a dynamic relocation. */
5648 case R_PPC64_ADDR64_LOCAL:
5649 if (bfd_link_pic (info))
5650 {
5651 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5652 ppc_howto_init ();
5653 /* xgettext:c-format */
5654 info->callbacks->einfo (_("%H: %s reloc unsupported "
5655 "in shared libraries and PIEs.\n"),
5656 abfd, sec, rel->r_offset,
5657 ppc64_elf_howto_table[r_type]->name);
5658 bfd_set_error (bfd_error_bad_value);
5659 return FALSE;
5660 }
5661 break;
5662
5663 case R_PPC64_TOC16:
5664 case R_PPC64_TOC16_DS:
5665 htab->do_multi_toc = 1;
5666 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5667 /* Fall through. */
5668 case R_PPC64_TOC16_LO:
5669 case R_PPC64_TOC16_HI:
5670 case R_PPC64_TOC16_HA:
5671 case R_PPC64_TOC16_LO_DS:
5672 sec->has_toc_reloc = 1;
5673 break;
5674
5675 /* Marker reloc. */
5676 case R_PPC64_ENTRY:
5677 break;
5678
5679 /* This relocation describes the C++ object vtable hierarchy.
5680 Reconstruct it for later use during GC. */
5681 case R_PPC64_GNU_VTINHERIT:
5682 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5683 return FALSE;
5684 break;
5685
5686 /* This relocation describes which C++ vtable entries are actually
5687 used. Record for later use during GC. */
5688 case R_PPC64_GNU_VTENTRY:
5689 BFD_ASSERT (h != NULL);
5690 if (h != NULL
5691 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5692 return FALSE;
5693 break;
5694
5695 case R_PPC64_REL14:
5696 case R_PPC64_REL14_BRTAKEN:
5697 case R_PPC64_REL14_BRNTAKEN:
5698 {
5699 asection *dest = NULL;
5700
5701 /* Heuristic: If jumping outside our section, chances are
5702 we are going to need a stub. */
5703 if (h != NULL)
5704 {
5705 /* If the sym is weak it may be overridden later, so
5706 don't assume we know where a weak sym lives. */
5707 if (h->root.type == bfd_link_hash_defined)
5708 dest = h->root.u.def.section;
5709 }
5710 else
5711 {
5712 Elf_Internal_Sym *isym;
5713
5714 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5715 abfd, r_symndx);
5716 if (isym == NULL)
5717 return FALSE;
5718
5719 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5720 }
5721
5722 if (dest != sec)
5723 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5724 }
5725 /* Fall through. */
5726
5727 case R_PPC64_REL24:
5728 plt_list = ifunc;
5729 if (h != NULL)
5730 {
5731 h->needs_plt = 1;
5732 if (h->root.root.string[0] == '.'
5733 && h->root.root.string[1] != '\0')
5734 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5735
5736 if (h == tga || h == dottga)
5737 {
5738 sec->has_tls_reloc = 1;
5739 if (rel != relocs
5740 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5741 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5742 /* We have a new-style __tls_get_addr call with
5743 a marker reloc. */
5744 ;
5745 else
5746 /* Mark this section as having an old-style call. */
5747 sec->has_tls_get_addr_call = 1;
5748 }
5749 plt_list = &h->plt.plist;
5750 }
5751
5752 /* We may need a .plt entry if the function this reloc
5753 refers to is in a shared lib. */
5754 if (plt_list
5755 && !update_plt_info (abfd, plt_list, rel->r_addend))
5756 return FALSE;
5757 break;
5758
5759 case R_PPC64_ADDR14:
5760 case R_PPC64_ADDR14_BRNTAKEN:
5761 case R_PPC64_ADDR14_BRTAKEN:
5762 case R_PPC64_ADDR24:
5763 goto dodyn;
5764
5765 case R_PPC64_TPREL64:
5766 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5767 if (bfd_link_dll (info))
5768 info->flags |= DF_STATIC_TLS;
5769 goto dotlstoc;
5770
5771 case R_PPC64_DTPMOD64:
5772 if (rel + 1 < rel_end
5773 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5774 && rel[1].r_offset == rel->r_offset + 8)
5775 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5776 else
5777 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5778 goto dotlstoc;
5779
5780 case R_PPC64_DTPREL64:
5781 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5782 if (rel != relocs
5783 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5784 && rel[-1].r_offset == rel->r_offset - 8)
5785 /* This is the second reloc of a dtpmod, dtprel pair.
5786 Don't mark with TLS_DTPREL. */
5787 goto dodyn;
5788
5789 dotlstoc:
5790 sec->has_tls_reloc = 1;
5791 if (h != NULL)
5792 {
5793 struct ppc_link_hash_entry *eh;
5794 eh = (struct ppc_link_hash_entry *) h;
5795 eh->tls_mask |= tls_type;
5796 }
5797 else
5798 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5799 rel->r_addend, tls_type))
5800 return FALSE;
5801
5802 ppc64_sec = ppc64_elf_section_data (sec);
5803 if (ppc64_sec->sec_type != sec_toc)
5804 {
5805 bfd_size_type amt;
5806
5807 /* One extra to simplify get_tls_mask. */
5808 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5809 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5810 if (ppc64_sec->u.toc.symndx == NULL)
5811 return FALSE;
5812 amt = sec->size * sizeof (bfd_vma) / 8;
5813 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5814 if (ppc64_sec->u.toc.add == NULL)
5815 return FALSE;
5816 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5817 ppc64_sec->sec_type = sec_toc;
5818 }
5819 BFD_ASSERT (rel->r_offset % 8 == 0);
5820 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5821 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5822
5823 /* Mark the second slot of a GD or LD entry.
5824 -1 to indicate GD and -2 to indicate LD. */
5825 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5826 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5827 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5828 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5829 goto dodyn;
5830
5831 case R_PPC64_TPREL16:
5832 case R_PPC64_TPREL16_LO:
5833 case R_PPC64_TPREL16_HI:
5834 case R_PPC64_TPREL16_HA:
5835 case R_PPC64_TPREL16_DS:
5836 case R_PPC64_TPREL16_LO_DS:
5837 case R_PPC64_TPREL16_HIGH:
5838 case R_PPC64_TPREL16_HIGHA:
5839 case R_PPC64_TPREL16_HIGHER:
5840 case R_PPC64_TPREL16_HIGHERA:
5841 case R_PPC64_TPREL16_HIGHEST:
5842 case R_PPC64_TPREL16_HIGHESTA:
5843 if (bfd_link_dll (info))
5844 info->flags |= DF_STATIC_TLS;
5845 goto dodyn;
5846
5847 case R_PPC64_ADDR64:
5848 if (opd_sym_map != NULL
5849 && rel + 1 < rel_end
5850 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5851 {
5852 if (h != NULL)
5853 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5854 else
5855 {
5856 asection *s;
5857 Elf_Internal_Sym *isym;
5858
5859 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5860 abfd, r_symndx);
5861 if (isym == NULL)
5862 return FALSE;
5863
5864 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5865 if (s != NULL && s != sec)
5866 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5867 }
5868 }
5869 /* Fall through. */
5870
5871 case R_PPC64_ADDR16:
5872 case R_PPC64_ADDR16_DS:
5873 case R_PPC64_ADDR16_HA:
5874 case R_PPC64_ADDR16_HI:
5875 case R_PPC64_ADDR16_HIGH:
5876 case R_PPC64_ADDR16_HIGHA:
5877 case R_PPC64_ADDR16_HIGHER:
5878 case R_PPC64_ADDR16_HIGHERA:
5879 case R_PPC64_ADDR16_HIGHEST:
5880 case R_PPC64_ADDR16_HIGHESTA:
5881 case R_PPC64_ADDR16_LO:
5882 case R_PPC64_ADDR16_LO_DS:
5883 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5884 && rel->r_addend == 0)
5885 {
5886 /* We may need a .plt entry if this reloc refers to a
5887 function in a shared lib. */
5888 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5889 return FALSE;
5890 h->pointer_equality_needed = 1;
5891 }
5892 /* Fall through. */
5893
5894 case R_PPC64_REL30:
5895 case R_PPC64_REL32:
5896 case R_PPC64_REL64:
5897 case R_PPC64_ADDR32:
5898 case R_PPC64_UADDR16:
5899 case R_PPC64_UADDR32:
5900 case R_PPC64_UADDR64:
5901 case R_PPC64_TOC:
5902 if (h != NULL && !bfd_link_pic (info))
5903 /* We may need a copy reloc. */
5904 h->non_got_ref = 1;
5905
5906 /* Don't propagate .opd relocs. */
5907 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5908 break;
5909
5910 /* If we are creating a shared library, and this is a reloc
5911 against a global symbol, or a non PC relative reloc
5912 against a local symbol, then we need to copy the reloc
5913 into the shared library. However, if we are linking with
5914 -Bsymbolic, we do not need to copy a reloc against a
5915 global symbol which is defined in an object we are
5916 including in the link (i.e., DEF_REGULAR is set). At
5917 this point we have not seen all the input files, so it is
5918 possible that DEF_REGULAR is not set now but will be set
5919 later (it is never cleared). In case of a weak definition,
5920 DEF_REGULAR may be cleared later by a strong definition in
5921 a shared library. We account for that possibility below by
5922 storing information in the dyn_relocs field of the hash
5923 table entry. A similar situation occurs when creating
5924 shared libraries and symbol visibility changes render the
5925 symbol local.
5926
5927 If on the other hand, we are creating an executable, we
5928 may need to keep relocations for symbols satisfied by a
5929 dynamic library if we manage to avoid copy relocs for the
5930 symbol. */
5931 dodyn:
5932 if ((bfd_link_pic (info)
5933 && (must_be_dyn_reloc (info, r_type)
5934 || (h != NULL
5935 && (!SYMBOLIC_BIND (info, h)
5936 || h->root.type == bfd_link_hash_defweak
5937 || !h->def_regular))))
5938 || (ELIMINATE_COPY_RELOCS
5939 && !bfd_link_pic (info)
5940 && h != NULL
5941 && (h->root.type == bfd_link_hash_defweak
5942 || !h->def_regular))
5943 || (!bfd_link_pic (info)
5944 && ifunc != NULL))
5945 {
5946 /* We must copy these reloc types into the output file.
5947 Create a reloc section in dynobj and make room for
5948 this reloc. */
5949 if (sreloc == NULL)
5950 {
5951 sreloc = _bfd_elf_make_dynamic_reloc_section
5952 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5953
5954 if (sreloc == NULL)
5955 return FALSE;
5956 }
5957
5958 /* If this is a global symbol, we count the number of
5959 relocations we need for this symbol. */
5960 if (h != NULL)
5961 {
5962 struct elf_dyn_relocs *p;
5963 struct elf_dyn_relocs **head;
5964
5965 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5966 p = *head;
5967 if (p == NULL || p->sec != sec)
5968 {
5969 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5970 if (p == NULL)
5971 return FALSE;
5972 p->next = *head;
5973 *head = p;
5974 p->sec = sec;
5975 p->count = 0;
5976 p->pc_count = 0;
5977 }
5978 p->count += 1;
5979 if (!must_be_dyn_reloc (info, r_type))
5980 p->pc_count += 1;
5981 }
5982 else
5983 {
5984 /* Track dynamic relocs needed for local syms too.
5985 We really need local syms available to do this
5986 easily. Oh well. */
5987 struct ppc_dyn_relocs *p;
5988 struct ppc_dyn_relocs **head;
5989 bfd_boolean is_ifunc;
5990 asection *s;
5991 void *vpp;
5992 Elf_Internal_Sym *isym;
5993
5994 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5995 abfd, r_symndx);
5996 if (isym == NULL)
5997 return FALSE;
5998
5999 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6000 if (s == NULL)
6001 s = sec;
6002
6003 vpp = &elf_section_data (s)->local_dynrel;
6004 head = (struct ppc_dyn_relocs **) vpp;
6005 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6006 p = *head;
6007 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6008 p = p->next;
6009 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6010 {
6011 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6012 if (p == NULL)
6013 return FALSE;
6014 p->next = *head;
6015 *head = p;
6016 p->sec = sec;
6017 p->ifunc = is_ifunc;
6018 p->count = 0;
6019 }
6020 p->count += 1;
6021 }
6022 }
6023 break;
6024
6025 default:
6026 break;
6027 }
6028 }
6029
6030 return TRUE;
6031}
6032
6033/* Merge backend specific data from an object file to the output
6034 object file when linking. */
6035
6036static bfd_boolean
6037ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6038{
6039 bfd *obfd = info->output_bfd;
6040 unsigned long iflags, oflags;
6041
6042 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6043 return TRUE;
6044
6045 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6046 return TRUE;
6047
6048 if (!_bfd_generic_verify_endian_match (ibfd, info))
6049 return FALSE;
6050
6051 iflags = elf_elfheader (ibfd)->e_flags;
6052 oflags = elf_elfheader (obfd)->e_flags;
6053
6054 if (iflags & ~EF_PPC64_ABI)
6055 {
6056 _bfd_error_handler
6057 /* xgettext:c-format */
6058 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6059 bfd_set_error (bfd_error_bad_value);
6060 return FALSE;
6061 }
6062 else if (iflags != oflags && iflags != 0)
6063 {
6064 _bfd_error_handler
6065 /* xgettext:c-format */
6066 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6067 ibfd, iflags, oflags);
6068 bfd_set_error (bfd_error_bad_value);
6069 return FALSE;
6070 }
6071
6072 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6073
6074 /* Merge Tag_compatibility attributes and any common GNU ones. */
6075 _bfd_elf_merge_object_attributes (ibfd, info);
6076
6077 return TRUE;
6078}
6079
6080static bfd_boolean
6081ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6082{
6083 /* Print normal ELF private data. */
6084 _bfd_elf_print_private_bfd_data (abfd, ptr);
6085
6086 if (elf_elfheader (abfd)->e_flags != 0)
6087 {
6088 FILE *file = ptr;
6089
6090 fprintf (file, _("private flags = 0x%lx:"),
6091 elf_elfheader (abfd)->e_flags);
6092
6093 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6094 fprintf (file, _(" [abiv%ld]"),
6095 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6096 fputc ('\n', file);
6097 }
6098
6099 return TRUE;
6100}
6101
6102/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6103 of the code entry point, and its section, which must be in the same
6104 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6105
6106static bfd_vma
6107opd_entry_value (asection *opd_sec,
6108 bfd_vma offset,
6109 asection **code_sec,
6110 bfd_vma *code_off,
6111 bfd_boolean in_code_sec)
6112{
6113 bfd *opd_bfd = opd_sec->owner;
6114 Elf_Internal_Rela *relocs;
6115 Elf_Internal_Rela *lo, *hi, *look;
6116 bfd_vma val;
6117
6118 /* No relocs implies we are linking a --just-symbols object, or looking
6119 at a final linked executable with addr2line or somesuch. */
6120 if (opd_sec->reloc_count == 0)
6121 {
6122 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6123
6124 if (contents == NULL)
6125 {
6126 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6127 return (bfd_vma) -1;
6128 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6129 }
6130
6131 /* PR 17512: file: 64b9dfbb. */
6132 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6133 return (bfd_vma) -1;
6134
6135 val = bfd_get_64 (opd_bfd, contents + offset);
6136 if (code_sec != NULL)
6137 {
6138 asection *sec, *likely = NULL;
6139
6140 if (in_code_sec)
6141 {
6142 sec = *code_sec;
6143 if (sec->vma <= val
6144 && val < sec->vma + sec->size)
6145 likely = sec;
6146 else
6147 val = -1;
6148 }
6149 else
6150 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6151 if (sec->vma <= val
6152 && (sec->flags & SEC_LOAD) != 0
6153 && (sec->flags & SEC_ALLOC) != 0)
6154 likely = sec;
6155 if (likely != NULL)
6156 {
6157 *code_sec = likely;
6158 if (code_off != NULL)
6159 *code_off = val - likely->vma;
6160 }
6161 }
6162 return val;
6163 }
6164
6165 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6166
6167 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6168 if (relocs == NULL)
6169 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6170 /* PR 17512: file: df8e1fd6. */
6171 if (relocs == NULL)
6172 return (bfd_vma) -1;
6173
6174 /* Go find the opd reloc at the sym address. */
6175 lo = relocs;
6176 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6177 val = (bfd_vma) -1;
6178 while (lo < hi)
6179 {
6180 look = lo + (hi - lo) / 2;
6181 if (look->r_offset < offset)
6182 lo = look + 1;
6183 else if (look->r_offset > offset)
6184 hi = look;
6185 else
6186 {
6187 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6188
6189 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6190 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6191 {
6192 unsigned long symndx = ELF64_R_SYM (look->r_info);
6193 asection *sec = NULL;
6194
6195 if (symndx >= symtab_hdr->sh_info
6196 && elf_sym_hashes (opd_bfd) != NULL)
6197 {
6198 struct elf_link_hash_entry **sym_hashes;
6199 struct elf_link_hash_entry *rh;
6200
6201 sym_hashes = elf_sym_hashes (opd_bfd);
6202 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6203 if (rh != NULL)
6204 {
6205 rh = elf_follow_link (rh);
6206 if (rh->root.type != bfd_link_hash_defined
6207 && rh->root.type != bfd_link_hash_defweak)
6208 break;
6209 if (rh->root.u.def.section->owner == opd_bfd)
6210 {
6211 val = rh->root.u.def.value;
6212 sec = rh->root.u.def.section;
6213 }
6214 }
6215 }
6216
6217 if (sec == NULL)
6218 {
6219 Elf_Internal_Sym *sym;
6220
6221 if (symndx < symtab_hdr->sh_info)
6222 {
6223 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6224 if (sym == NULL)
6225 {
6226 size_t symcnt = symtab_hdr->sh_info;
6227 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6228 symcnt, 0,
6229 NULL, NULL, NULL);
6230 if (sym == NULL)
6231 break;
6232 symtab_hdr->contents = (bfd_byte *) sym;
6233 }
6234 sym += symndx;
6235 }
6236 else
6237 {
6238 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6239 1, symndx,
6240 NULL, NULL, NULL);
6241 if (sym == NULL)
6242 break;
6243 }
6244 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6245 if (sec == NULL)
6246 break;
6247 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6248 val = sym->st_value;
6249 }
6250
6251 val += look->r_addend;
6252 if (code_off != NULL)
6253 *code_off = val;
6254 if (code_sec != NULL)
6255 {
6256 if (in_code_sec && *code_sec != sec)
6257 return -1;
6258 else
6259 *code_sec = sec;
6260 }
6261 if (sec->output_section != NULL)
6262 val += sec->output_section->vma + sec->output_offset;
6263 }
6264 break;
6265 }
6266 }
6267
6268 return val;
6269}
6270
6271/* If the ELF symbol SYM might be a function in SEC, return the
6272 function size and set *CODE_OFF to the function's entry point,
6273 otherwise return zero. */
6274
6275static bfd_size_type
6276ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6277 bfd_vma *code_off)
6278{
6279 bfd_size_type size;
6280
6281 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6282 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6283 return 0;
6284
6285 size = 0;
6286 if (!(sym->flags & BSF_SYNTHETIC))
6287 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6288
6289 if (strcmp (sym->section->name, ".opd") == 0)
6290 {
6291 struct _opd_sec_data *opd = get_opd_info (sym->section);
6292 bfd_vma symval = sym->value;
6293
6294 if (opd != NULL
6295 && opd->adjust != NULL
6296 && elf_section_data (sym->section)->relocs != NULL)
6297 {
6298 /* opd_entry_value will use cached relocs that have been
6299 adjusted, but with raw symbols. That means both local
6300 and global symbols need adjusting. */
6301 long adjust = opd->adjust[OPD_NDX (symval)];
6302 if (adjust == -1)
6303 return 0;
6304 symval += adjust;
6305 }
6306
6307 if (opd_entry_value (sym->section, symval,
6308 &sec, code_off, TRUE) == (bfd_vma) -1)
6309 return 0;
6310 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6311 symbol. This size has nothing to do with the code size of the
6312 function, which is what we're supposed to return, but the
6313 code size isn't available without looking up the dot-sym.
6314 However, doing that would be a waste of time particularly
6315 since elf_find_function will look at the dot-sym anyway.
6316 Now, elf_find_function will keep the largest size of any
6317 function sym found at the code address of interest, so return
6318 1 here to avoid it incorrectly caching a larger function size
6319 for a small function. This does mean we return the wrong
6320 size for a new-ABI function of size 24, but all that does is
6321 disable caching for such functions. */
6322 if (size == 24)
6323 size = 1;
6324 }
6325 else
6326 {
6327 if (sym->section != sec)
6328 return 0;
6329 *code_off = sym->value;
6330 }
6331 if (size == 0)
6332 size = 1;
6333 return size;
6334}
6335
6336/* Return true if symbol is a strong function defined in an ELFv2
6337 object with st_other localentry bits of zero, ie. its local entry
6338 point coincides with its global entry point. */
6339
6340static bfd_boolean
6341is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6342{
6343 return (h != NULL
6344 && h->type == STT_FUNC
6345 && h->root.type == bfd_link_hash_defined
6346 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6347 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6348 && is_ppc64_elf (h->root.u.def.section->owner)
6349 && abiversion (h->root.u.def.section->owner) >= 2);
6350}
6351
6352/* Return true if symbol is defined in a regular object file. */
6353
6354static bfd_boolean
6355is_static_defined (struct elf_link_hash_entry *h)
6356{
6357 return ((h->root.type == bfd_link_hash_defined
6358 || h->root.type == bfd_link_hash_defweak)
6359 && h->root.u.def.section != NULL
6360 && h->root.u.def.section->output_section != NULL);
6361}
6362
6363/* If FDH is a function descriptor symbol, return the associated code
6364 entry symbol if it is defined. Return NULL otherwise. */
6365
6366static struct ppc_link_hash_entry *
6367defined_code_entry (struct ppc_link_hash_entry *fdh)
6368{
6369 if (fdh->is_func_descriptor)
6370 {
6371 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6372 if (fh->elf.root.type == bfd_link_hash_defined
6373 || fh->elf.root.type == bfd_link_hash_defweak)
6374 return fh;
6375 }
6376 return NULL;
6377}
6378
6379/* If FH is a function code entry symbol, return the associated
6380 function descriptor symbol if it is defined. Return NULL otherwise. */
6381
6382static struct ppc_link_hash_entry *
6383defined_func_desc (struct ppc_link_hash_entry *fh)
6384{
6385 if (fh->oh != NULL
6386 && fh->oh->is_func_descriptor)
6387 {
6388 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6389 if (fdh->elf.root.type == bfd_link_hash_defined
6390 || fdh->elf.root.type == bfd_link_hash_defweak)
6391 return fdh;
6392 }
6393 return NULL;
6394}
6395
6396static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6397
6398/* Garbage collect sections, after first dealing with dot-symbols. */
6399
6400static bfd_boolean
6401ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6402{
6403 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6404
6405 if (htab != NULL && htab->need_func_desc_adj)
6406 {
6407 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6408 htab->need_func_desc_adj = 0;
6409 }
6410 return bfd_elf_gc_sections (abfd, info);
6411}
6412
6413/* Mark all our entry sym sections, both opd and code section. */
6414
6415static void
6416ppc64_elf_gc_keep (struct bfd_link_info *info)
6417{
6418 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6419 struct bfd_sym_chain *sym;
6420
6421 if (htab == NULL)
6422 return;
6423
6424 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6425 {
6426 struct ppc_link_hash_entry *eh, *fh;
6427 asection *sec;
6428
6429 eh = (struct ppc_link_hash_entry *)
6430 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6431 if (eh == NULL)
6432 continue;
6433 if (eh->elf.root.type != bfd_link_hash_defined
6434 && eh->elf.root.type != bfd_link_hash_defweak)
6435 continue;
6436
6437 fh = defined_code_entry (eh);
6438 if (fh != NULL)
6439 {
6440 sec = fh->elf.root.u.def.section;
6441 sec->flags |= SEC_KEEP;
6442 }
6443 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6444 && opd_entry_value (eh->elf.root.u.def.section,
6445 eh->elf.root.u.def.value,
6446 &sec, NULL, FALSE) != (bfd_vma) -1)
6447 sec->flags |= SEC_KEEP;
6448
6449 sec = eh->elf.root.u.def.section;
6450 sec->flags |= SEC_KEEP;
6451 }
6452}
6453
6454/* Mark sections containing dynamically referenced symbols. When
6455 building shared libraries, we must assume that any visible symbol is
6456 referenced. */
6457
6458static bfd_boolean
6459ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6460{
6461 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6462 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6463 struct ppc_link_hash_entry *fdh;
6464 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6465
6466 /* Dynamic linking info is on the func descriptor sym. */
6467 fdh = defined_func_desc (eh);
6468 if (fdh != NULL)
6469 eh = fdh;
6470
6471 if ((eh->elf.root.type == bfd_link_hash_defined
6472 || eh->elf.root.type == bfd_link_hash_defweak)
6473 && (eh->elf.ref_dynamic
6474 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6475 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6476 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6477 && (!bfd_link_executable (info)
6478 || info->gc_keep_exported
6479 || info->export_dynamic
6480 || (eh->elf.dynamic
6481 && d != NULL
6482 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6483 && (eh->elf.versioned >= versioned
6484 || !bfd_hide_sym_by_version (info->version_info,
6485 eh->elf.root.root.string)))))
6486 {
6487 asection *code_sec;
6488 struct ppc_link_hash_entry *fh;
6489
6490 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6491
6492 /* Function descriptor syms cause the associated
6493 function code sym section to be marked. */
6494 fh = defined_code_entry (eh);
6495 if (fh != NULL)
6496 {
6497 code_sec = fh->elf.root.u.def.section;
6498 code_sec->flags |= SEC_KEEP;
6499 }
6500 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6501 && opd_entry_value (eh->elf.root.u.def.section,
6502 eh->elf.root.u.def.value,
6503 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6504 code_sec->flags |= SEC_KEEP;
6505 }
6506
6507 return TRUE;
6508}
6509
6510/* Return the section that should be marked against GC for a given
6511 relocation. */
6512
6513static asection *
6514ppc64_elf_gc_mark_hook (asection *sec,
6515 struct bfd_link_info *info,
6516 Elf_Internal_Rela *rel,
6517 struct elf_link_hash_entry *h,
6518 Elf_Internal_Sym *sym)
6519{
6520 asection *rsec;
6521
6522 /* Syms return NULL if we're marking .opd, so we avoid marking all
6523 function sections, as all functions are referenced in .opd. */
6524 rsec = NULL;
6525 if (get_opd_info (sec) != NULL)
6526 return rsec;
6527
6528 if (h != NULL)
6529 {
6530 enum elf_ppc64_reloc_type r_type;
6531 struct ppc_link_hash_entry *eh, *fh, *fdh;
6532
6533 r_type = ELF64_R_TYPE (rel->r_info);
6534 switch (r_type)
6535 {
6536 case R_PPC64_GNU_VTINHERIT:
6537 case R_PPC64_GNU_VTENTRY:
6538 break;
6539
6540 default:
6541 switch (h->root.type)
6542 {
6543 case bfd_link_hash_defined:
6544 case bfd_link_hash_defweak:
6545 eh = (struct ppc_link_hash_entry *) h;
6546 fdh = defined_func_desc (eh);
6547 if (fdh != NULL)
6548 {
6549 /* -mcall-aixdesc code references the dot-symbol on
6550 a call reloc. Mark the function descriptor too
6551 against garbage collection. */
6552 fdh->elf.mark = 1;
6553 if (fdh->elf.u.weakdef != NULL)
6554 fdh->elf.u.weakdef->mark = 1;
6555 eh = fdh;
6556 }
6557
6558 /* Function descriptor syms cause the associated
6559 function code sym section to be marked. */
6560 fh = defined_code_entry (eh);
6561 if (fh != NULL)
6562 {
6563 /* They also mark their opd section. */
6564 eh->elf.root.u.def.section->gc_mark = 1;
6565
6566 rsec = fh->elf.root.u.def.section;
6567 }
6568 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6569 && opd_entry_value (eh->elf.root.u.def.section,
6570 eh->elf.root.u.def.value,
6571 &rsec, NULL, FALSE) != (bfd_vma) -1)
6572 eh->elf.root.u.def.section->gc_mark = 1;
6573 else
6574 rsec = h->root.u.def.section;
6575 break;
6576
6577 case bfd_link_hash_common:
6578 rsec = h->root.u.c.p->section;
6579 break;
6580
6581 default:
6582 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6583 }
6584 }
6585 }
6586 else
6587 {
6588 struct _opd_sec_data *opd;
6589
6590 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6591 opd = get_opd_info (rsec);
6592 if (opd != NULL && opd->func_sec != NULL)
6593 {
6594 rsec->gc_mark = 1;
6595
6596 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6597 }
6598 }
6599
6600 return rsec;
6601}
6602
6603/* Update the .got, .plt. and dynamic reloc reference counts for the
6604 section being removed. */
6605
6606static bfd_boolean
6607ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6608 asection *sec, const Elf_Internal_Rela *relocs)
6609{
6610 struct ppc_link_hash_table *htab;
6611 Elf_Internal_Shdr *symtab_hdr;
6612 struct elf_link_hash_entry **sym_hashes;
6613 struct got_entry **local_got_ents;
6614 const Elf_Internal_Rela *rel, *relend;
6615
6616 if (bfd_link_relocatable (info))
6617 return TRUE;
6618
6619 if ((sec->flags & SEC_ALLOC) == 0)
6620 return TRUE;
6621
6622 elf_section_data (sec)->local_dynrel = NULL;
6623
6624 htab = ppc_hash_table (info);
6625 if (htab == NULL)
6626 return FALSE;
6627
6628 symtab_hdr = &elf_symtab_hdr (abfd);
6629 sym_hashes = elf_sym_hashes (abfd);
6630 local_got_ents = elf_local_got_ents (abfd);
6631
6632 relend = relocs + sec->reloc_count;
6633 for (rel = relocs; rel < relend; rel++)
6634 {
6635 unsigned long r_symndx;
6636 enum elf_ppc64_reloc_type r_type;
6637 struct elf_link_hash_entry *h = NULL;
6638 struct plt_entry **plt_list = NULL;
6639 unsigned char tls_type = 0;
6640
6641 r_symndx = ELF64_R_SYM (rel->r_info);
6642 r_type = ELF64_R_TYPE (rel->r_info);
6643 if (r_symndx >= symtab_hdr->sh_info)
6644 {
6645 struct ppc_link_hash_entry *eh;
6646 struct elf_dyn_relocs **pp;
6647 struct elf_dyn_relocs *p;
6648
6649 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6650 h = elf_follow_link (h);
6651 eh = (struct ppc_link_hash_entry *) h;
6652
6653 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6654 if (p->sec == sec)
6655 {
6656 /* Everything must go for SEC. */
6657 *pp = p->next;
6658 break;
6659 }
6660 }
6661
6662 switch (r_type)
6663 {
6664 case R_PPC64_GOT_TLSLD16:
6665 case R_PPC64_GOT_TLSLD16_LO:
6666 case R_PPC64_GOT_TLSLD16_HI:
6667 case R_PPC64_GOT_TLSLD16_HA:
6668 tls_type = TLS_TLS | TLS_LD;
6669 goto dogot;
6670
6671 case R_PPC64_GOT_TLSGD16:
6672 case R_PPC64_GOT_TLSGD16_LO:
6673 case R_PPC64_GOT_TLSGD16_HI:
6674 case R_PPC64_GOT_TLSGD16_HA:
6675 tls_type = TLS_TLS | TLS_GD;
6676 goto dogot;
6677
6678 case R_PPC64_GOT_TPREL16_DS:
6679 case R_PPC64_GOT_TPREL16_LO_DS:
6680 case R_PPC64_GOT_TPREL16_HI:
6681 case R_PPC64_GOT_TPREL16_HA:
6682 tls_type = TLS_TLS | TLS_TPREL;
6683 goto dogot;
6684
6685 case R_PPC64_GOT_DTPREL16_DS:
6686 case R_PPC64_GOT_DTPREL16_LO_DS:
6687 case R_PPC64_GOT_DTPREL16_HI:
6688 case R_PPC64_GOT_DTPREL16_HA:
6689 tls_type = TLS_TLS | TLS_DTPREL;
6690 goto dogot;
6691
6692 case R_PPC64_GOT16:
6693 case R_PPC64_GOT16_DS:
6694 case R_PPC64_GOT16_HA:
6695 case R_PPC64_GOT16_HI:
6696 case R_PPC64_GOT16_LO:
6697 case R_PPC64_GOT16_LO_DS:
6698 dogot:
6699 {
6700 struct got_entry *ent;
6701
6702 if (h != NULL)
6703 ent = h->got.glist;
6704 else
6705 ent = local_got_ents[r_symndx];
6706
6707 for (; ent != NULL; ent = ent->next)
6708 if (ent->addend == rel->r_addend
6709 && ent->owner == abfd
6710 && ent->tls_type == tls_type)
6711 break;
6712 if (ent == NULL)
6713 abort ();
6714 if (ent->got.refcount > 0)
6715 ent->got.refcount -= 1;
6716 }
6717 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6718 plt_list = &h->plt.plist;
6719 break;
6720
6721 case R_PPC64_PLT16_HA:
6722 case R_PPC64_PLT16_HI:
6723 case R_PPC64_PLT16_LO:
6724 case R_PPC64_PLT32:
6725 case R_PPC64_PLT64:
6726 case R_PPC64_REL14:
6727 case R_PPC64_REL14_BRNTAKEN:
6728 case R_PPC64_REL14_BRTAKEN:
6729 case R_PPC64_REL24:
6730 if (h != NULL)
6731 plt_list = &h->plt.plist;
6732 else if (local_got_ents != NULL)
6733 {
6734 struct plt_entry **local_plt = (struct plt_entry **)
6735 (local_got_ents + symtab_hdr->sh_info);
6736 unsigned char *local_got_tls_masks = (unsigned char *)
6737 (local_plt + symtab_hdr->sh_info);
6738 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6739 plt_list = local_plt + r_symndx;
6740 }
6741 break;
6742
6743 case R_PPC64_ADDR64:
6744 case R_PPC64_ADDR16:
6745 case R_PPC64_ADDR16_DS:
6746 case R_PPC64_ADDR16_HA:
6747 case R_PPC64_ADDR16_HI:
6748 case R_PPC64_ADDR16_HIGH:
6749 case R_PPC64_ADDR16_HIGHA:
6750 case R_PPC64_ADDR16_HIGHER:
6751 case R_PPC64_ADDR16_HIGHERA:
6752 case R_PPC64_ADDR16_HIGHEST:
6753 case R_PPC64_ADDR16_HIGHESTA:
6754 case R_PPC64_ADDR16_LO:
6755 case R_PPC64_ADDR16_LO_DS:
6756 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6757 && rel->r_addend == 0)
6758 plt_list = &h->plt.plist;
6759 break;
6760
6761 default:
6762 break;
6763 }
6764 if (plt_list != NULL)
6765 {
6766 struct plt_entry *ent;
6767
6768 for (ent = *plt_list; ent != NULL; ent = ent->next)
6769 if (ent->addend == rel->r_addend)
6770 break;
6771 if (ent != NULL && ent->plt.refcount > 0)
6772 ent->plt.refcount -= 1;
6773 }
6774 }
6775 return TRUE;
6776}
6777
6778/* The maximum size of .sfpr. */
6779#define SFPR_MAX (218*4)
6780
6781struct sfpr_def_parms
6782{
6783 const char name[12];
6784 unsigned char lo, hi;
6785 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6786 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6787};
6788
6789/* Auto-generate _save*, _rest* functions in .sfpr.
6790 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6791 instead. */
6792
6793static bfd_boolean
6794sfpr_define (struct bfd_link_info *info,
6795 const struct sfpr_def_parms *parm,
6796 asection *stub_sec)
6797{
6798 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6799 unsigned int i;
6800 size_t len = strlen (parm->name);
6801 bfd_boolean writing = FALSE;
6802 char sym[16];
6803
6804 if (htab == NULL)
6805 return FALSE;
6806
6807 memcpy (sym, parm->name, len);
6808 sym[len + 2] = 0;
6809
6810 for (i = parm->lo; i <= parm->hi; i++)
6811 {
6812 struct ppc_link_hash_entry *h;
6813
6814 sym[len + 0] = i / 10 + '0';
6815 sym[len + 1] = i % 10 + '0';
6816 h = (struct ppc_link_hash_entry *)
6817 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6818 if (stub_sec != NULL)
6819 {
6820 if (h != NULL
6821 && h->elf.root.type == bfd_link_hash_defined
6822 && h->elf.root.u.def.section == htab->sfpr)
6823 {
6824 struct elf_link_hash_entry *s;
6825 char buf[32];
6826 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6827 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6828 if (s == NULL)
6829 return FALSE;
6830 if (s->root.type == bfd_link_hash_new
6831 || (s->root.type = bfd_link_hash_defined
6832 && s->root.u.def.section == stub_sec))
6833 {
6834 s->root.type = bfd_link_hash_defined;
6835 s->root.u.def.section = stub_sec;
6836 s->root.u.def.value = (stub_sec->size
6837 + h->elf.root.u.def.value);
6838 s->ref_regular = 1;
6839 s->def_regular = 1;
6840 s->ref_regular_nonweak = 1;
6841 s->forced_local = 1;
6842 s->non_elf = 0;
6843 s->root.linker_def = 1;
6844 }
6845 }
6846 continue;
6847 }
6848 if (h != NULL)
6849 {
6850 h->save_res = 1;
6851 if (!h->elf.def_regular)
6852 {
6853 h->elf.root.type = bfd_link_hash_defined;
6854 h->elf.root.u.def.section = htab->sfpr;
6855 h->elf.root.u.def.value = htab->sfpr->size;
6856 h->elf.type = STT_FUNC;
6857 h->elf.def_regular = 1;
6858 h->elf.non_elf = 0;
6859 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6860 writing = TRUE;
6861 if (htab->sfpr->contents == NULL)
6862 {
6863 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6864 if (htab->sfpr->contents == NULL)
6865 return FALSE;
6866 }
6867 }
6868 }
6869 if (writing)
6870 {
6871 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6872 if (i != parm->hi)
6873 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6874 else
6875 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6876 htab->sfpr->size = p - htab->sfpr->contents;
6877 }
6878 }
6879
6880 return TRUE;
6881}
6882
6883static bfd_byte *
6884savegpr0 (bfd *abfd, bfd_byte *p, int r)
6885{
6886 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6887 return p + 4;
6888}
6889
6890static bfd_byte *
6891savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6892{
6893 p = savegpr0 (abfd, p, r);
6894 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6895 p = p + 4;
6896 bfd_put_32 (abfd, BLR, p);
6897 return p + 4;
6898}
6899
6900static bfd_byte *
6901restgpr0 (bfd *abfd, bfd_byte *p, int r)
6902{
6903 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6904 return p + 4;
6905}
6906
6907static bfd_byte *
6908restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6909{
6910 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6911 p = p + 4;
6912 p = restgpr0 (abfd, p, r);
6913 bfd_put_32 (abfd, MTLR_R0, p);
6914 p = p + 4;
6915 if (r == 29)
6916 {
6917 p = restgpr0 (abfd, p, 30);
6918 p = restgpr0 (abfd, p, 31);
6919 }
6920 bfd_put_32 (abfd, BLR, p);
6921 return p + 4;
6922}
6923
6924static bfd_byte *
6925savegpr1 (bfd *abfd, bfd_byte *p, int r)
6926{
6927 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6928 return p + 4;
6929}
6930
6931static bfd_byte *
6932savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6933{
6934 p = savegpr1 (abfd, p, r);
6935 bfd_put_32 (abfd, BLR, p);
6936 return p + 4;
6937}
6938
6939static bfd_byte *
6940restgpr1 (bfd *abfd, bfd_byte *p, int r)
6941{
6942 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6943 return p + 4;
6944}
6945
6946static bfd_byte *
6947restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6948{
6949 p = restgpr1 (abfd, p, r);
6950 bfd_put_32 (abfd, BLR, p);
6951 return p + 4;
6952}
6953
6954static bfd_byte *
6955savefpr (bfd *abfd, bfd_byte *p, int r)
6956{
6957 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6958 return p + 4;
6959}
6960
6961static bfd_byte *
6962savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6963{
6964 p = savefpr (abfd, p, r);
6965 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6966 p = p + 4;
6967 bfd_put_32 (abfd, BLR, p);
6968 return p + 4;
6969}
6970
6971static bfd_byte *
6972restfpr (bfd *abfd, bfd_byte *p, int r)
6973{
6974 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6975 return p + 4;
6976}
6977
6978static bfd_byte *
6979restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6980{
6981 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6982 p = p + 4;
6983 p = restfpr (abfd, p, r);
6984 bfd_put_32 (abfd, MTLR_R0, p);
6985 p = p + 4;
6986 if (r == 29)
6987 {
6988 p = restfpr (abfd, p, 30);
6989 p = restfpr (abfd, p, 31);
6990 }
6991 bfd_put_32 (abfd, BLR, p);
6992 return p + 4;
6993}
6994
6995static bfd_byte *
6996savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6997{
6998 p = savefpr (abfd, p, r);
6999 bfd_put_32 (abfd, BLR, p);
7000 return p + 4;
7001}
7002
7003static bfd_byte *
7004restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
7005{
7006 p = restfpr (abfd, p, r);
7007 bfd_put_32 (abfd, BLR, p);
7008 return p + 4;
7009}
7010
7011static bfd_byte *
7012savevr (bfd *abfd, bfd_byte *p, int r)
7013{
7014 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7015 p = p + 4;
7016 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
7017 return p + 4;
7018}
7019
7020static bfd_byte *
7021savevr_tail (bfd *abfd, bfd_byte *p, int r)
7022{
7023 p = savevr (abfd, p, r);
7024 bfd_put_32 (abfd, BLR, p);
7025 return p + 4;
7026}
7027
7028static bfd_byte *
7029restvr (bfd *abfd, bfd_byte *p, int r)
7030{
7031 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
7032 p = p + 4;
7033 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
7034 return p + 4;
7035}
7036
7037static bfd_byte *
7038restvr_tail (bfd *abfd, bfd_byte *p, int r)
7039{
7040 p = restvr (abfd, p, r);
7041 bfd_put_32 (abfd, BLR, p);
7042 return p + 4;
7043}
7044
7045/* Called via elf_link_hash_traverse to transfer dynamic linking
7046 information on function code symbol entries to their corresponding
7047 function descriptor symbol entries. */
7048
7049static bfd_boolean
7050func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7051{
7052 struct bfd_link_info *info;
7053 struct ppc_link_hash_table *htab;
7054 struct ppc_link_hash_entry *fh;
7055 struct ppc_link_hash_entry *fdh;
7056 bfd_boolean force_local;
7057
7058 fh = (struct ppc_link_hash_entry *) h;
7059 if (fh->elf.root.type == bfd_link_hash_indirect)
7060 return TRUE;
7061
7062 if (!fh->is_func)
7063 return TRUE;
7064
7065 if (fh->elf.root.root.string[0] != '.'
7066 || fh->elf.root.root.string[1] == '\0')
7067 return TRUE;
7068
7069 info = inf;
7070 htab = ppc_hash_table (info);
7071 if (htab == NULL)
7072 return FALSE;
7073
7074 /* Find the corresponding function descriptor symbol. */
7075 fdh = lookup_fdh (fh, htab);
7076
7077 /* Resolve undefined references to dot-symbols as the value
7078 in the function descriptor, if we have one in a regular object.
7079 This is to satisfy cases like ".quad .foo". Calls to functions
7080 in dynamic objects are handled elsewhere. */
7081 if ((fh->elf.root.type == bfd_link_hash_undefined
7082 || fh->elf.root.type == bfd_link_hash_undefweak)
7083 && (fdh->elf.root.type == bfd_link_hash_defined
7084 || fdh->elf.root.type == bfd_link_hash_defweak)
7085 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7086 && opd_entry_value (fdh->elf.root.u.def.section,
7087 fdh->elf.root.u.def.value,
7088 &fh->elf.root.u.def.section,
7089 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7090 {
7091 fh->elf.root.type = fdh->elf.root.type;
7092 fh->elf.forced_local = 1;
7093 fh->elf.def_regular = fdh->elf.def_regular;
7094 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7095 }
7096
7097 if (!fh->elf.dynamic)
7098 {
7099 struct plt_entry *ent;
7100
7101 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7102 if (ent->plt.refcount > 0)
7103 break;
7104 if (ent == NULL)
7105 return TRUE;
7106 }
7107
7108 /* Create a descriptor as undefined if necessary. */
7109 if (fdh == NULL
7110 && !bfd_link_executable (info)
7111 && (fh->elf.root.type == bfd_link_hash_undefined
7112 || fh->elf.root.type == bfd_link_hash_undefweak))
7113 {
7114 fdh = make_fdh (info, fh);
7115 if (fdh == NULL)
7116 return FALSE;
7117 }
7118
7119 /* We can't support overriding of symbols on a fake descriptor. */
7120 if (fdh != NULL
7121 && fdh->fake
7122 && (fh->elf.root.type == bfd_link_hash_defined
7123 || fh->elf.root.type == bfd_link_hash_defweak))
7124 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7125
7126 /* Transfer dynamic linking information to the function descriptor. */
7127 if (fdh != NULL)
7128 {
7129 fdh->elf.ref_regular |= fh->elf.ref_regular;
7130 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7131 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7132 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7133 fdh->elf.dynamic |= fh->elf.dynamic;
7134 fdh->elf.needs_plt |= (fh->elf.needs_plt
7135 || fh->elf.type == STT_FUNC
7136 || fh->elf.type == STT_GNU_IFUNC);
7137 move_plt_plist (fh, fdh);
7138
7139 if (!fdh->elf.forced_local
7140 && fh->elf.dynindx != -1)
7141 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7142 return FALSE;
7143 }
7144
7145 /* Now that the info is on the function descriptor, clear the
7146 function code sym info. Any function code syms for which we
7147 don't have a definition in a regular file, we force local.
7148 This prevents a shared library from exporting syms that have
7149 been imported from another library. Function code syms that
7150 are really in the library we must leave global to prevent the
7151 linker dragging in a definition from a static library. */
7152 force_local = (!fh->elf.def_regular
7153 || fdh == NULL
7154 || !fdh->elf.def_regular
7155 || fdh->elf.forced_local);
7156 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7157
7158 return TRUE;
7159}
7160
7161static const struct sfpr_def_parms save_res_funcs[] =
7162 {
7163 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7164 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7165 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7166 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7167 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7168 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7169 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7170 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7171 { "._savef", 14, 31, savefpr, savefpr1_tail },
7172 { "._restf", 14, 31, restfpr, restfpr1_tail },
7173 { "_savevr_", 20, 31, savevr, savevr_tail },
7174 { "_restvr_", 20, 31, restvr, restvr_tail }
7175 };
7176
7177/* Called near the start of bfd_elf_size_dynamic_sections. We use
7178 this hook to a) provide some gcc support functions, and b) transfer
7179 dynamic linking information gathered so far on function code symbol
7180 entries, to their corresponding function descriptor symbol entries. */
7181
7182static bfd_boolean
7183ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7184 struct bfd_link_info *info)
7185{
7186 struct ppc_link_hash_table *htab;
7187
7188 htab = ppc_hash_table (info);
7189 if (htab == NULL)
7190 return FALSE;
7191
7192 /* Provide any missing _save* and _rest* functions. */
7193 if (htab->sfpr != NULL)
7194 {
7195 unsigned int i;
7196
7197 htab->sfpr->size = 0;
7198 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7199 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7200 return FALSE;
7201 if (htab->sfpr->size == 0)
7202 htab->sfpr->flags |= SEC_EXCLUDE;
7203 }
7204
7205 if (bfd_link_relocatable (info))
7206 return TRUE;
7207
7208 if (htab->elf.hgot != NULL)
7209 {
7210 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7211 /* Make .TOC. defined so as to prevent it being made dynamic.
7212 The wrong value here is fixed later in ppc64_elf_set_toc. */
7213 if (!htab->elf.hgot->def_regular
7214 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7215 {
7216 htab->elf.hgot->root.type = bfd_link_hash_defined;
7217 htab->elf.hgot->root.u.def.value = 0;
7218 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7219 htab->elf.hgot->def_regular = 1;
7220 htab->elf.hgot->root.linker_def = 1;
7221 }
7222 htab->elf.hgot->type = STT_OBJECT;
7223 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7224 | STV_HIDDEN);
7225 }
7226
7227 if (htab->need_func_desc_adj)
7228 {
7229 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7230 htab->need_func_desc_adj = 0;
7231 }
7232
7233 return TRUE;
7234}
7235
7236/* Return true if we have dynamic relocs against H that apply to
7237 read-only sections. */
7238
7239static bfd_boolean
7240readonly_dynrelocs (struct elf_link_hash_entry *h)
7241{
7242 struct ppc_link_hash_entry *eh;
7243 struct elf_dyn_relocs *p;
7244
7245 eh = (struct ppc_link_hash_entry *) h;
7246 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7247 {
7248 asection *s = p->sec->output_section;
7249
7250 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7251 return TRUE;
7252 }
7253 return FALSE;
7254}
7255
7256/* Return true if we have dynamic relocs against H or any of its weak
7257 aliases, that apply to read-only sections. */
7258
7259static bfd_boolean
7260alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7261{
7262 struct ppc_link_hash_entry *eh;
7263
7264 eh = (struct ppc_link_hash_entry *) h;
7265 do
7266 {
7267 if (readonly_dynrelocs (&eh->elf))
7268 return TRUE;
7269 eh = eh->weakref;
7270 } while (eh != NULL && &eh->elf != h);
7271
7272 return FALSE;
7273}
7274
7275/* Return whether EH has pc-relative dynamic relocs. */
7276
7277static bfd_boolean
7278pc_dynrelocs (struct ppc_link_hash_entry *eh)
7279{
7280 struct elf_dyn_relocs *p;
7281
7282 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7283 if (p->pc_count != 0)
7284 return TRUE;
7285 return FALSE;
7286}
7287
7288/* Return true if a global entry stub will be created for H. Valid
7289 for ELFv2 before plt entries have been allocated. */
7290
7291static bfd_boolean
7292global_entry_stub (struct elf_link_hash_entry *h)
7293{
7294 struct plt_entry *pent;
7295
7296 if (!h->pointer_equality_needed
7297 || h->def_regular)
7298 return FALSE;
7299
7300 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7301 if (pent->plt.refcount > 0
7302 && pent->addend == 0)
7303 return TRUE;
7304
7305 return FALSE;
7306}
7307
7308/* Adjust a symbol defined by a dynamic object and referenced by a
7309 regular object. The current definition is in some section of the
7310 dynamic object, but we're not including those sections. We have to
7311 change the definition to something the rest of the link can
7312 understand. */
7313
7314static bfd_boolean
7315ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7316 struct elf_link_hash_entry *h)
7317{
7318 struct ppc_link_hash_table *htab;
7319 asection *s, *srel;
7320
7321 htab = ppc_hash_table (info);
7322 if (htab == NULL)
7323 return FALSE;
7324
7325 /* Deal with function syms. */
7326 if (h->type == STT_FUNC
7327 || h->type == STT_GNU_IFUNC
7328 || h->needs_plt)
7329 {
7330 /* Clear procedure linkage table information for any symbol that
7331 won't need a .plt entry. */
7332 struct plt_entry *ent;
7333 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7334 if (ent->plt.refcount > 0)
7335 break;
7336 if (ent == NULL
7337 || (h->type != STT_GNU_IFUNC
7338 && (SYMBOL_CALLS_LOCAL (info, h)
7339 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7340 || ((struct ppc_link_hash_entry *) h)->save_res)
7341 {
7342 h->plt.plist = NULL;
7343 h->needs_plt = 0;
7344 h->pointer_equality_needed = 0;
7345 }
7346 else if (abiversion (info->output_bfd) >= 2)
7347 {
7348 /* Taking a function's address in a read/write section
7349 doesn't require us to define the function symbol in the
7350 executable on a global entry stub. A dynamic reloc can
7351 be used instead. The reason we prefer a few more dynamic
7352 relocs is that calling via a global entry stub costs a
7353 few more instructions, and pointer_equality_needed causes
7354 extra work in ld.so when resolving these symbols. */
7355 if (global_entry_stub (h)
7356 && !alias_readonly_dynrelocs (h))
7357 {
7358 h->pointer_equality_needed = 0;
7359 /* After adjust_dynamic_symbol, non_got_ref set in
7360 the non-pic case means that dyn_relocs for this
7361 symbol should be discarded. */
7362 h->non_got_ref = 0;
7363 }
7364
7365 /* If making a plt entry, then we don't need copy relocs. */
7366 return TRUE;
7367 }
7368 }
7369 else
7370 h->plt.plist = NULL;
7371
7372 /* If this is a weak symbol, and there is a real definition, the
7373 processor independent code will have arranged for us to see the
7374 real definition first, and we can just use the same value. */
7375 if (h->u.weakdef != NULL)
7376 {
7377 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7378 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7379 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7380 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7381 if (ELIMINATE_COPY_RELOCS)
7382 h->non_got_ref = h->u.weakdef->non_got_ref;
7383 return TRUE;
7384 }
7385
7386 /* If we are creating a shared library, we must presume that the
7387 only references to the symbol are via the global offset table.
7388 For such cases we need not do anything here; the relocations will
7389 be handled correctly by relocate_section. */
7390 if (bfd_link_pic (info))
7391 return TRUE;
7392
7393 /* If there are no references to this symbol that do not use the
7394 GOT, we don't need to generate a copy reloc. */
7395 if (!h->non_got_ref)
7396 return TRUE;
7397
7398 /* Don't generate a copy reloc for symbols defined in the executable. */
7399 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7400
7401 /* If -z nocopyreloc was given, don't generate them either. */
7402 || info->nocopyreloc
7403
7404 /* If we didn't find any dynamic relocs in read-only sections, then
7405 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7406 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7407
7408 /* Protected variables do not work with .dynbss. The copy in
7409 .dynbss won't be used by the shared library with the protected
7410 definition for the variable. Text relocations are preferable
7411 to an incorrect program. */
7412 || h->protected_def)
7413 {
7414 h->non_got_ref = 0;
7415 return TRUE;
7416 }
7417
7418 if (h->plt.plist != NULL)
7419 {
7420 /* We should never get here, but unfortunately there are versions
7421 of gcc out there that improperly (for this ABI) put initialized
7422 function pointers, vtable refs and suchlike in read-only
7423 sections. Allow them to proceed, but warn that this might
7424 break at runtime. */
7425 info->callbacks->einfo
7426 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7427 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7428 h->root.root.string);
7429 }
7430
7431 /* This is a reference to a symbol defined by a dynamic object which
7432 is not a function. */
7433
7434 /* We must allocate the symbol in our .dynbss section, which will
7435 become part of the .bss section of the executable. There will be
7436 an entry for this symbol in the .dynsym section. The dynamic
7437 object will contain position independent code, so all references
7438 from the dynamic object to this symbol will go through the global
7439 offset table. The dynamic linker will use the .dynsym entry to
7440 determine the address it must put in the global offset table, so
7441 both the dynamic object and the regular object will refer to the
7442 same memory location for the variable. */
7443
7444 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7445 to copy the initial value out of the dynamic object and into the
7446 runtime process image. We need to remember the offset into the
7447 .rela.bss section we are going to use. */
7448 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7449 {
7450 s = htab->elf.sdynrelro;
7451 srel = htab->elf.sreldynrelro;
7452 }
7453 else
7454 {
7455 s = htab->elf.sdynbss;
7456 srel = htab->elf.srelbss;
7457 }
7458 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7459 {
7460 srel->size += sizeof (Elf64_External_Rela);
7461 h->needs_copy = 1;
7462 }
7463
7464 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7465}
7466
7467/* If given a function descriptor symbol, hide both the function code
7468 sym and the descriptor. */
7469static void
7470ppc64_elf_hide_symbol (struct bfd_link_info *info,
7471 struct elf_link_hash_entry *h,
7472 bfd_boolean force_local)
7473{
7474 struct ppc_link_hash_entry *eh;
7475 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7476
7477 eh = (struct ppc_link_hash_entry *) h;
7478 if (eh->is_func_descriptor)
7479 {
7480 struct ppc_link_hash_entry *fh = eh->oh;
7481
7482 if (fh == NULL)
7483 {
7484 const char *p, *q;
7485 struct elf_link_hash_table *htab = elf_hash_table (info);
7486 char save;
7487
7488 /* We aren't supposed to use alloca in BFD because on
7489 systems which do not have alloca the version in libiberty
7490 calls xmalloc, which might cause the program to crash
7491 when it runs out of memory. This function doesn't have a
7492 return status, so there's no way to gracefully return an
7493 error. So cheat. We know that string[-1] can be safely
7494 accessed; It's either a string in an ELF string table,
7495 or allocated in an objalloc structure. */
7496
7497 p = eh->elf.root.root.string - 1;
7498 save = *p;
7499 *(char *) p = '.';
7500 fh = (struct ppc_link_hash_entry *)
7501 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7502 *(char *) p = save;
7503
7504 /* Unfortunately, if it so happens that the string we were
7505 looking for was allocated immediately before this string,
7506 then we overwrote the string terminator. That's the only
7507 reason the lookup should fail. */
7508 if (fh == NULL)
7509 {
7510 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7511 while (q >= eh->elf.root.root.string && *q == *p)
7512 --q, --p;
7513 if (q < eh->elf.root.root.string && *p == '.')
7514 fh = (struct ppc_link_hash_entry *)
7515 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7516 }
7517 if (fh != NULL)
7518 {
7519 eh->oh = fh;
7520 fh->oh = eh;
7521 }
7522 }
7523 if (fh != NULL)
7524 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7525 }
7526}
7527
7528static bfd_boolean
7529get_sym_h (struct elf_link_hash_entry **hp,
7530 Elf_Internal_Sym **symp,
7531 asection **symsecp,
7532 unsigned char **tls_maskp,
7533 Elf_Internal_Sym **locsymsp,
7534 unsigned long r_symndx,
7535 bfd *ibfd)
7536{
7537 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7538
7539 if (r_symndx >= symtab_hdr->sh_info)
7540 {
7541 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7542 struct elf_link_hash_entry *h;
7543
7544 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7545 h = elf_follow_link (h);
7546
7547 if (hp != NULL)
7548 *hp = h;
7549
7550 if (symp != NULL)
7551 *symp = NULL;
7552
7553 if (symsecp != NULL)
7554 {
7555 asection *symsec = NULL;
7556 if (h->root.type == bfd_link_hash_defined
7557 || h->root.type == bfd_link_hash_defweak)
7558 symsec = h->root.u.def.section;
7559 *symsecp = symsec;
7560 }
7561
7562 if (tls_maskp != NULL)
7563 {
7564 struct ppc_link_hash_entry *eh;
7565
7566 eh = (struct ppc_link_hash_entry *) h;
7567 *tls_maskp = &eh->tls_mask;
7568 }
7569 }
7570 else
7571 {
7572 Elf_Internal_Sym *sym;
7573 Elf_Internal_Sym *locsyms = *locsymsp;
7574
7575 if (locsyms == NULL)
7576 {
7577 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7578 if (locsyms == NULL)
7579 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7580 symtab_hdr->sh_info,
7581 0, NULL, NULL, NULL);
7582 if (locsyms == NULL)
7583 return FALSE;
7584 *locsymsp = locsyms;
7585 }
7586 sym = locsyms + r_symndx;
7587
7588 if (hp != NULL)
7589 *hp = NULL;
7590
7591 if (symp != NULL)
7592 *symp = sym;
7593
7594 if (symsecp != NULL)
7595 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7596
7597 if (tls_maskp != NULL)
7598 {
7599 struct got_entry **lgot_ents;
7600 unsigned char *tls_mask;
7601
7602 tls_mask = NULL;
7603 lgot_ents = elf_local_got_ents (ibfd);
7604 if (lgot_ents != NULL)
7605 {
7606 struct plt_entry **local_plt = (struct plt_entry **)
7607 (lgot_ents + symtab_hdr->sh_info);
7608 unsigned char *lgot_masks = (unsigned char *)
7609 (local_plt + symtab_hdr->sh_info);
7610 tls_mask = &lgot_masks[r_symndx];
7611 }
7612 *tls_maskp = tls_mask;
7613 }
7614 }
7615 return TRUE;
7616}
7617
7618/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7619 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7620 type suitable for optimization, and 1 otherwise. */
7621
7622static int
7623get_tls_mask (unsigned char **tls_maskp,
7624 unsigned long *toc_symndx,
7625 bfd_vma *toc_addend,
7626 Elf_Internal_Sym **locsymsp,
7627 const Elf_Internal_Rela *rel,
7628 bfd *ibfd)
7629{
7630 unsigned long r_symndx;
7631 int next_r;
7632 struct elf_link_hash_entry *h;
7633 Elf_Internal_Sym *sym;
7634 asection *sec;
7635 bfd_vma off;
7636
7637 r_symndx = ELF64_R_SYM (rel->r_info);
7638 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7639 return 0;
7640
7641 if ((*tls_maskp != NULL && **tls_maskp != 0)
7642 || sec == NULL
7643 || ppc64_elf_section_data (sec) == NULL
7644 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7645 return 1;
7646
7647 /* Look inside a TOC section too. */
7648 if (h != NULL)
7649 {
7650 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7651 off = h->root.u.def.value;
7652 }
7653 else
7654 off = sym->st_value;
7655 off += rel->r_addend;
7656 BFD_ASSERT (off % 8 == 0);
7657 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7658 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7659 if (toc_symndx != NULL)
7660 *toc_symndx = r_symndx;
7661 if (toc_addend != NULL)
7662 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7663 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7664 return 0;
7665 if ((h == NULL || is_static_defined (h))
7666 && (next_r == -1 || next_r == -2))
7667 return 1 - next_r;
7668 return 1;
7669}
7670
7671/* Find (or create) an entry in the tocsave hash table. */
7672
7673static struct tocsave_entry *
7674tocsave_find (struct ppc_link_hash_table *htab,
7675 enum insert_option insert,
7676 Elf_Internal_Sym **local_syms,
7677 const Elf_Internal_Rela *irela,
7678 bfd *ibfd)
7679{
7680 unsigned long r_indx;
7681 struct elf_link_hash_entry *h;
7682 Elf_Internal_Sym *sym;
7683 struct tocsave_entry ent, *p;
7684 hashval_t hash;
7685 struct tocsave_entry **slot;
7686
7687 r_indx = ELF64_R_SYM (irela->r_info);
7688 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7689 return NULL;
7690 if (ent.sec == NULL || ent.sec->output_section == NULL)
7691 {
7692 _bfd_error_handler
7693 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7694 return NULL;
7695 }
7696
7697 if (h != NULL)
7698 ent.offset = h->root.u.def.value;
7699 else
7700 ent.offset = sym->st_value;
7701 ent.offset += irela->r_addend;
7702
7703 hash = tocsave_htab_hash (&ent);
7704 slot = ((struct tocsave_entry **)
7705 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7706 if (slot == NULL)
7707 return NULL;
7708
7709 if (*slot == NULL)
7710 {
7711 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7712 if (p == NULL)
7713 return NULL;
7714 *p = ent;
7715 *slot = p;
7716 }
7717 return *slot;
7718}
7719
7720/* Adjust all global syms defined in opd sections. In gcc generated
7721 code for the old ABI, these will already have been done. */
7722
7723static bfd_boolean
7724adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7725{
7726 struct ppc_link_hash_entry *eh;
7727 asection *sym_sec;
7728 struct _opd_sec_data *opd;
7729
7730 if (h->root.type == bfd_link_hash_indirect)
7731 return TRUE;
7732
7733 if (h->root.type != bfd_link_hash_defined
7734 && h->root.type != bfd_link_hash_defweak)
7735 return TRUE;
7736
7737 eh = (struct ppc_link_hash_entry *) h;
7738 if (eh->adjust_done)
7739 return TRUE;
7740
7741 sym_sec = eh->elf.root.u.def.section;
7742 opd = get_opd_info (sym_sec);
7743 if (opd != NULL && opd->adjust != NULL)
7744 {
7745 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7746 if (adjust == -1)
7747 {
7748 /* This entry has been deleted. */
7749 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7750 if (dsec == NULL)
7751 {
7752 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7753 if (discarded_section (dsec))
7754 {
7755 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7756 break;
7757 }
7758 }
7759 eh->elf.root.u.def.value = 0;
7760 eh->elf.root.u.def.section = dsec;
7761 }
7762 else
7763 eh->elf.root.u.def.value += adjust;
7764 eh->adjust_done = 1;
7765 }
7766 return TRUE;
7767}
7768
7769/* Handles decrementing dynamic reloc counts for the reloc specified by
7770 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7771 have already been determined. */
7772
7773static bfd_boolean
7774dec_dynrel_count (bfd_vma r_info,
7775 asection *sec,
7776 struct bfd_link_info *info,
7777 Elf_Internal_Sym **local_syms,
7778 struct elf_link_hash_entry *h,
7779 Elf_Internal_Sym *sym)
7780{
7781 enum elf_ppc64_reloc_type r_type;
7782 asection *sym_sec = NULL;
7783
7784 /* Can this reloc be dynamic? This switch, and later tests here
7785 should be kept in sync with the code in check_relocs. */
7786 r_type = ELF64_R_TYPE (r_info);
7787 switch (r_type)
7788 {
7789 default:
7790 return TRUE;
7791
7792 case R_PPC64_TPREL16:
7793 case R_PPC64_TPREL16_LO:
7794 case R_PPC64_TPREL16_HI:
7795 case R_PPC64_TPREL16_HA:
7796 case R_PPC64_TPREL16_DS:
7797 case R_PPC64_TPREL16_LO_DS:
7798 case R_PPC64_TPREL16_HIGH:
7799 case R_PPC64_TPREL16_HIGHA:
7800 case R_PPC64_TPREL16_HIGHER:
7801 case R_PPC64_TPREL16_HIGHERA:
7802 case R_PPC64_TPREL16_HIGHEST:
7803 case R_PPC64_TPREL16_HIGHESTA:
7804 case R_PPC64_TPREL64:
7805 case R_PPC64_DTPMOD64:
7806 case R_PPC64_DTPREL64:
7807 case R_PPC64_ADDR64:
7808 case R_PPC64_REL30:
7809 case R_PPC64_REL32:
7810 case R_PPC64_REL64:
7811 case R_PPC64_ADDR14:
7812 case R_PPC64_ADDR14_BRNTAKEN:
7813 case R_PPC64_ADDR14_BRTAKEN:
7814 case R_PPC64_ADDR16:
7815 case R_PPC64_ADDR16_DS:
7816 case R_PPC64_ADDR16_HA:
7817 case R_PPC64_ADDR16_HI:
7818 case R_PPC64_ADDR16_HIGH:
7819 case R_PPC64_ADDR16_HIGHA:
7820 case R_PPC64_ADDR16_HIGHER:
7821 case R_PPC64_ADDR16_HIGHERA:
7822 case R_PPC64_ADDR16_HIGHEST:
7823 case R_PPC64_ADDR16_HIGHESTA:
7824 case R_PPC64_ADDR16_LO:
7825 case R_PPC64_ADDR16_LO_DS:
7826 case R_PPC64_ADDR24:
7827 case R_PPC64_ADDR32:
7828 case R_PPC64_UADDR16:
7829 case R_PPC64_UADDR32:
7830 case R_PPC64_UADDR64:
7831 case R_PPC64_TOC:
7832 break;
7833 }
7834
7835 if (local_syms != NULL)
7836 {
7837 unsigned long r_symndx;
7838 bfd *ibfd = sec->owner;
7839
7840 r_symndx = ELF64_R_SYM (r_info);
7841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7842 return FALSE;
7843 }
7844
7845 if ((bfd_link_pic (info)
7846 && (must_be_dyn_reloc (info, r_type)
7847 || (h != NULL
7848 && (!SYMBOLIC_BIND (info, h)
7849 || h->root.type == bfd_link_hash_defweak
7850 || !h->def_regular))))
7851 || (ELIMINATE_COPY_RELOCS
7852 && !bfd_link_pic (info)
7853 && h != NULL
7854 && (h->root.type == bfd_link_hash_defweak
7855 || !h->def_regular)))
7856 ;
7857 else
7858 return TRUE;
7859
7860 if (h != NULL)
7861 {
7862 struct elf_dyn_relocs *p;
7863 struct elf_dyn_relocs **pp;
7864 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7865
7866 /* elf_gc_sweep may have already removed all dyn relocs associated
7867 with local syms for a given section. Also, symbol flags are
7868 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7869 report a dynreloc miscount. */
7870 if (*pp == NULL && info->gc_sections)
7871 return TRUE;
7872
7873 while ((p = *pp) != NULL)
7874 {
7875 if (p->sec == sec)
7876 {
7877 if (!must_be_dyn_reloc (info, r_type))
7878 p->pc_count -= 1;
7879 p->count -= 1;
7880 if (p->count == 0)
7881 *pp = p->next;
7882 return TRUE;
7883 }
7884 pp = &p->next;
7885 }
7886 }
7887 else
7888 {
7889 struct ppc_dyn_relocs *p;
7890 struct ppc_dyn_relocs **pp;
7891 void *vpp;
7892 bfd_boolean is_ifunc;
7893
7894 if (local_syms == NULL)
7895 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7896 if (sym_sec == NULL)
7897 sym_sec = sec;
7898
7899 vpp = &elf_section_data (sym_sec)->local_dynrel;
7900 pp = (struct ppc_dyn_relocs **) vpp;
7901
7902 if (*pp == NULL && info->gc_sections)
7903 return TRUE;
7904
7905 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7906 while ((p = *pp) != NULL)
7907 {
7908 if (p->sec == sec && p->ifunc == is_ifunc)
7909 {
7910 p->count -= 1;
7911 if (p->count == 0)
7912 *pp = p->next;
7913 return TRUE;
7914 }
7915 pp = &p->next;
7916 }
7917 }
7918
7919 /* xgettext:c-format */
7920 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7921 sec->owner, sec);
7922 bfd_set_error (bfd_error_bad_value);
7923 return FALSE;
7924}
7925
7926/* Remove unused Official Procedure Descriptor entries. Currently we
7927 only remove those associated with functions in discarded link-once
7928 sections, or weakly defined functions that have been overridden. It
7929 would be possible to remove many more entries for statically linked
7930 applications. */
7931
7932bfd_boolean
7933ppc64_elf_edit_opd (struct bfd_link_info *info)
7934{
7935 bfd *ibfd;
7936 bfd_boolean some_edited = FALSE;
7937 asection *need_pad = NULL;
7938 struct ppc_link_hash_table *htab;
7939
7940 htab = ppc_hash_table (info);
7941 if (htab == NULL)
7942 return FALSE;
7943
7944 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7945 {
7946 asection *sec;
7947 Elf_Internal_Rela *relstart, *rel, *relend;
7948 Elf_Internal_Shdr *symtab_hdr;
7949 Elf_Internal_Sym *local_syms;
7950 struct _opd_sec_data *opd;
7951 bfd_boolean need_edit, add_aux_fields, broken;
7952 bfd_size_type cnt_16b = 0;
7953
7954 if (!is_ppc64_elf (ibfd))
7955 continue;
7956
7957 sec = bfd_get_section_by_name (ibfd, ".opd");
7958 if (sec == NULL || sec->size == 0)
7959 continue;
7960
7961 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7962 continue;
7963
7964 if (sec->output_section == bfd_abs_section_ptr)
7965 continue;
7966
7967 /* Look through the section relocs. */
7968 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7969 continue;
7970
7971 local_syms = NULL;
7972 symtab_hdr = &elf_symtab_hdr (ibfd);
7973
7974 /* Read the relocations. */
7975 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7976 info->keep_memory);
7977 if (relstart == NULL)
7978 return FALSE;
7979
7980 /* First run through the relocs to check they are sane, and to
7981 determine whether we need to edit this opd section. */
7982 need_edit = FALSE;
7983 broken = FALSE;
7984 need_pad = sec;
7985 relend = relstart + sec->reloc_count;
7986 for (rel = relstart; rel < relend; )
7987 {
7988 enum elf_ppc64_reloc_type r_type;
7989 unsigned long r_symndx;
7990 asection *sym_sec;
7991 struct elf_link_hash_entry *h;
7992 Elf_Internal_Sym *sym;
7993 bfd_vma offset;
7994
7995 /* .opd contains an array of 16 or 24 byte entries. We're
7996 only interested in the reloc pointing to a function entry
7997 point. */
7998 offset = rel->r_offset;
7999 if (rel + 1 == relend
8000 || rel[1].r_offset != offset + 8)
8001 {
8002 /* If someone messes with .opd alignment then after a
8003 "ld -r" we might have padding in the middle of .opd.
8004 Also, there's nothing to prevent someone putting
8005 something silly in .opd with the assembler. No .opd
8006 optimization for them! */
8007 broken_opd:
8008 _bfd_error_handler
8009 (_("%B: .opd is not a regular array of opd entries"), ibfd);
8010 broken = TRUE;
8011 break;
8012 }
8013
8014 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
8015 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
8016 {
8017 _bfd_error_handler
8018 /* xgettext:c-format */
8019 (_("%B: unexpected reloc type %u in .opd section"),
8020 ibfd, r_type);
8021 broken = TRUE;
8022 break;
8023 }
8024
8025 r_symndx = ELF64_R_SYM (rel->r_info);
8026 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8027 r_symndx, ibfd))
8028 goto error_ret;
8029
8030 if (sym_sec == NULL || sym_sec->owner == NULL)
8031 {
8032 const char *sym_name;
8033 if (h != NULL)
8034 sym_name = h->root.root.string;
8035 else
8036 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8037 sym_sec);
8038
8039 _bfd_error_handler
8040 /* xgettext:c-format */
8041 (_("%B: undefined sym `%s' in .opd section"),
8042 ibfd, sym_name);
8043 broken = TRUE;
8044 break;
8045 }
8046
8047 /* opd entries are always for functions defined in the
8048 current input bfd. If the symbol isn't defined in the
8049 input bfd, then we won't be using the function in this
8050 bfd; It must be defined in a linkonce section in another
8051 bfd, or is weak. It's also possible that we are
8052 discarding the function due to a linker script /DISCARD/,
8053 which we test for via the output_section. */
8054 if (sym_sec->owner != ibfd
8055 || sym_sec->output_section == bfd_abs_section_ptr)
8056 need_edit = TRUE;
8057
8058 rel += 2;
8059 if (rel + 1 == relend
8060 || (rel + 2 < relend
8061 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8062 ++rel;
8063
8064 if (rel == relend)
8065 {
8066 if (sec->size == offset + 24)
8067 {
8068 need_pad = NULL;
8069 break;
8070 }
8071 if (sec->size == offset + 16)
8072 {
8073 cnt_16b++;
8074 break;
8075 }
8076 goto broken_opd;
8077 }
8078 else if (rel + 1 < relend
8079 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8080 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8081 {
8082 if (rel[0].r_offset == offset + 16)
8083 cnt_16b++;
8084 else if (rel[0].r_offset != offset + 24)
8085 goto broken_opd;
8086 }
8087 else
8088 goto broken_opd;
8089 }
8090
8091 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8092
8093 if (!broken && (need_edit || add_aux_fields))
8094 {
8095 Elf_Internal_Rela *write_rel;
8096 Elf_Internal_Shdr *rel_hdr;
8097 bfd_byte *rptr, *wptr;
8098 bfd_byte *new_contents;
8099 bfd_size_type amt;
8100
8101 new_contents = NULL;
8102 amt = OPD_NDX (sec->size) * sizeof (long);
8103 opd = &ppc64_elf_section_data (sec)->u.opd;
8104 opd->adjust = bfd_zalloc (sec->owner, amt);
8105 if (opd->adjust == NULL)
8106 return FALSE;
8107 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8108
8109 /* This seems a waste of time as input .opd sections are all
8110 zeros as generated by gcc, but I suppose there's no reason
8111 this will always be so. We might start putting something in
8112 the third word of .opd entries. */
8113 if ((sec->flags & SEC_IN_MEMORY) == 0)
8114 {
8115 bfd_byte *loc;
8116 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8117 {
8118 if (loc != NULL)
8119 free (loc);
8120 error_ret:
8121 if (local_syms != NULL
8122 && symtab_hdr->contents != (unsigned char *) local_syms)
8123 free (local_syms);
8124 if (elf_section_data (sec)->relocs != relstart)
8125 free (relstart);
8126 return FALSE;
8127 }
8128 sec->contents = loc;
8129 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8130 }
8131
8132 elf_section_data (sec)->relocs = relstart;
8133
8134 new_contents = sec->contents;
8135 if (add_aux_fields)
8136 {
8137 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8138 if (new_contents == NULL)
8139 return FALSE;
8140 need_pad = NULL;
8141 }
8142 wptr = new_contents;
8143 rptr = sec->contents;
8144 write_rel = relstart;
8145 for (rel = relstart; rel < relend; )
8146 {
8147 unsigned long r_symndx;
8148 asection *sym_sec;
8149 struct elf_link_hash_entry *h;
8150 struct ppc_link_hash_entry *fdh = NULL;
8151 Elf_Internal_Sym *sym;
8152 long opd_ent_size;
8153 Elf_Internal_Rela *next_rel;
8154 bfd_boolean skip;
8155
8156 r_symndx = ELF64_R_SYM (rel->r_info);
8157 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8158 r_symndx, ibfd))
8159 goto error_ret;
8160
8161 next_rel = rel + 2;
8162 if (next_rel + 1 == relend
8163 || (next_rel + 2 < relend
8164 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8165 ++next_rel;
8166
8167 /* See if the .opd entry is full 24 byte or
8168 16 byte (with fd_aux entry overlapped with next
8169 fd_func). */
8170 opd_ent_size = 24;
8171 if (next_rel == relend)
8172 {
8173 if (sec->size == rel->r_offset + 16)
8174 opd_ent_size = 16;
8175 }
8176 else if (next_rel->r_offset == rel->r_offset + 16)
8177 opd_ent_size = 16;
8178
8179 if (h != NULL
8180 && h->root.root.string[0] == '.')
8181 {
8182 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8183 if (fdh != NULL)
8184 {
8185 fdh = ppc_follow_link (fdh);
8186 if (fdh->elf.root.type != bfd_link_hash_defined
8187 && fdh->elf.root.type != bfd_link_hash_defweak)
8188 fdh = NULL;
8189 }
8190 }
8191
8192 skip = (sym_sec->owner != ibfd
8193 || sym_sec->output_section == bfd_abs_section_ptr);
8194 if (skip)
8195 {
8196 if (fdh != NULL && sym_sec->owner == ibfd)
8197 {
8198 /* Arrange for the function descriptor sym
8199 to be dropped. */
8200 fdh->elf.root.u.def.value = 0;
8201 fdh->elf.root.u.def.section = sym_sec;
8202 }
8203 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8204
8205 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8206 rel = next_rel;
8207 else
8208 while (1)
8209 {
8210 if (!dec_dynrel_count (rel->r_info, sec, info,
8211 NULL, h, sym))
8212 goto error_ret;
8213
8214 if (++rel == next_rel)
8215 break;
8216
8217 r_symndx = ELF64_R_SYM (rel->r_info);
8218 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8219 r_symndx, ibfd))
8220 goto error_ret;
8221 }
8222 }
8223 else
8224 {
8225 /* We'll be keeping this opd entry. */
8226 long adjust;
8227
8228 if (fdh != NULL)
8229 {
8230 /* Redefine the function descriptor symbol to
8231 this location in the opd section. It is
8232 necessary to update the value here rather
8233 than using an array of adjustments as we do
8234 for local symbols, because various places
8235 in the generic ELF code use the value
8236 stored in u.def.value. */
8237 fdh->elf.root.u.def.value = wptr - new_contents;
8238 fdh->adjust_done = 1;
8239 }
8240
8241 /* Local syms are a bit tricky. We could
8242 tweak them as they can be cached, but
8243 we'd need to look through the local syms
8244 for the function descriptor sym which we
8245 don't have at the moment. So keep an
8246 array of adjustments. */
8247 adjust = (wptr - new_contents) - (rptr - sec->contents);
8248 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8249
8250 if (wptr != rptr)
8251 memcpy (wptr, rptr, opd_ent_size);
8252 wptr += opd_ent_size;
8253 if (add_aux_fields && opd_ent_size == 16)
8254 {
8255 memset (wptr, '\0', 8);
8256 wptr += 8;
8257 }
8258
8259 /* We need to adjust any reloc offsets to point to the
8260 new opd entries. */
8261 for ( ; rel != next_rel; ++rel)
8262 {
8263 rel->r_offset += adjust;
8264 if (write_rel != rel)
8265 memcpy (write_rel, rel, sizeof (*rel));
8266 ++write_rel;
8267 }
8268 }
8269
8270 rptr += opd_ent_size;
8271 }
8272
8273 sec->size = wptr - new_contents;
8274 sec->reloc_count = write_rel - relstart;
8275 if (add_aux_fields)
8276 {
8277 free (sec->contents);
8278 sec->contents = new_contents;
8279 }
8280
8281 /* Fudge the header size too, as this is used later in
8282 elf_bfd_final_link if we are emitting relocs. */
8283 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8284 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8285 some_edited = TRUE;
8286 }
8287 else if (elf_section_data (sec)->relocs != relstart)
8288 free (relstart);
8289
8290 if (local_syms != NULL
8291 && symtab_hdr->contents != (unsigned char *) local_syms)
8292 {
8293 if (!info->keep_memory)
8294 free (local_syms);
8295 else
8296 symtab_hdr->contents = (unsigned char *) local_syms;
8297 }
8298 }
8299
8300 if (some_edited)
8301 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8302
8303 /* If we are doing a final link and the last .opd entry is just 16 byte
8304 long, add a 8 byte padding after it. */
8305 if (need_pad != NULL && !bfd_link_relocatable (info))
8306 {
8307 bfd_byte *p;
8308
8309 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8310 {
8311 BFD_ASSERT (need_pad->size > 0);
8312
8313 p = bfd_malloc (need_pad->size + 8);
8314 if (p == NULL)
8315 return FALSE;
8316
8317 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8318 p, 0, need_pad->size))
8319 return FALSE;
8320
8321 need_pad->contents = p;
8322 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8323 }
8324 else
8325 {
8326 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8327 if (p == NULL)
8328 return FALSE;
8329
8330 need_pad->contents = p;
8331 }
8332
8333 memset (need_pad->contents + need_pad->size, 0, 8);
8334 need_pad->size += 8;
8335 }
8336
8337 return TRUE;
8338}
8339
8340/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8341
8342asection *
8343ppc64_elf_tls_setup (struct bfd_link_info *info)
8344{
8345 struct ppc_link_hash_table *htab;
8346
8347 htab = ppc_hash_table (info);
8348 if (htab == NULL)
8349 return NULL;
8350
8351 if (abiversion (info->output_bfd) == 1)
8352 htab->opd_abi = 1;
8353
8354 if (htab->params->no_multi_toc)
8355 htab->do_multi_toc = 0;
8356 else if (!htab->do_multi_toc)
8357 htab->params->no_multi_toc = 1;
8358
8359 /* Default to --no-plt-localentry, as this option can cause problems
8360 with symbol interposition. For example, glibc libpthread.so and
8361 libc.so duplicate many pthread symbols, with a fallback
8362 implementation in libc.so. In some cases the fallback does more
8363 work than the pthread implementation. __pthread_condattr_destroy
8364 is one such symbol: the libpthread.so implementation is
8365 localentry:0 while the libc.so implementation is localentry:8.
8366 An app that "cleverly" uses dlopen to only load necessary
8367 libraries at runtime may omit loading libpthread.so when not
8368 running multi-threaded, which then results in the libc.so
8369 fallback symbols being used and ld.so complaining. Now there
8370 are workarounds in ld (see non_zero_localentry) to detect the
8371 pthread situation, but that may not be the only case where
8372 --plt-localentry can cause trouble. */
8373 if (htab->params->plt_localentry0 < 0)
8374 htab->params->plt_localentry0 = 0;
8375 if (htab->params->plt_localentry0
8376 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8377 FALSE, FALSE, FALSE) == NULL)
8378 info->callbacks->einfo
8379 (_("%P: warning: --plt-localentry is especially dangerous without "
8380 "ld.so support to detect ABI violations.\n"));
8381
8382 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8383 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8384 FALSE, FALSE, TRUE));
8385 /* Move dynamic linking info to the function descriptor sym. */
8386 if (htab->tls_get_addr != NULL)
8387 func_desc_adjust (&htab->tls_get_addr->elf, info);
8388 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8389 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8390 FALSE, FALSE, TRUE));
8391 if (htab->params->tls_get_addr_opt)
8392 {
8393 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8394
8395 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8396 FALSE, FALSE, TRUE);
8397 if (opt != NULL)
8398 func_desc_adjust (opt, info);
8399 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8400 FALSE, FALSE, TRUE);
8401 if (opt_fd != NULL
8402 && (opt_fd->root.type == bfd_link_hash_defined
8403 || opt_fd->root.type == bfd_link_hash_defweak))
8404 {
8405 /* If glibc supports an optimized __tls_get_addr call stub,
8406 signalled by the presence of __tls_get_addr_opt, and we'll
8407 be calling __tls_get_addr via a plt call stub, then
8408 make __tls_get_addr point to __tls_get_addr_opt. */
8409 tga_fd = &htab->tls_get_addr_fd->elf;
8410 if (htab->elf.dynamic_sections_created
8411 && tga_fd != NULL
8412 && (tga_fd->type == STT_FUNC
8413 || tga_fd->needs_plt)
8414 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8415 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8416 {
8417 struct plt_entry *ent;
8418
8419 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8420 if (ent->plt.refcount > 0)
8421 break;
8422 if (ent != NULL)
8423 {
8424 tga_fd->root.type = bfd_link_hash_indirect;
8425 tga_fd->root.u.i.link = &opt_fd->root;
8426 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8427 opt_fd->mark = 1;
8428 if (opt_fd->dynindx != -1)
8429 {
8430 /* Use __tls_get_addr_opt in dynamic relocations. */
8431 opt_fd->dynindx = -1;
8432 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8433 opt_fd->dynstr_index);
8434 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8435 return NULL;
8436 }
8437 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8438 tga = &htab->tls_get_addr->elf;
8439 if (opt != NULL && tga != NULL)
8440 {
8441 tga->root.type = bfd_link_hash_indirect;
8442 tga->root.u.i.link = &opt->root;
8443 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8444 opt->mark = 1;
8445 _bfd_elf_link_hash_hide_symbol (info, opt,
8446 tga->forced_local);
8447 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8448 }
8449 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8450 htab->tls_get_addr_fd->is_func_descriptor = 1;
8451 if (htab->tls_get_addr != NULL)
8452 {
8453 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8454 htab->tls_get_addr->is_func = 1;
8455 }
8456 }
8457 }
8458 }
8459 else if (htab->params->tls_get_addr_opt < 0)
8460 htab->params->tls_get_addr_opt = 0;
8461 }
8462 return _bfd_elf_tls_setup (info->output_bfd, info);
8463}
8464
8465/* Return TRUE iff REL is a branch reloc with a global symbol matching
8466 HASH1 or HASH2. */
8467
8468static bfd_boolean
8469branch_reloc_hash_match (const bfd *ibfd,
8470 const Elf_Internal_Rela *rel,
8471 const struct ppc_link_hash_entry *hash1,
8472 const struct ppc_link_hash_entry *hash2)
8473{
8474 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8475 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8476 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8477
8478 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8479 {
8480 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8481 struct elf_link_hash_entry *h;
8482
8483 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8484 h = elf_follow_link (h);
8485 if (h == &hash1->elf || h == &hash2->elf)
8486 return TRUE;
8487 }
8488 return FALSE;
8489}
8490
8491/* Run through all the TLS relocs looking for optimization
8492 opportunities. The linker has been hacked (see ppc64elf.em) to do
8493 a preliminary section layout so that we know the TLS segment
8494 offsets. We can't optimize earlier because some optimizations need
8495 to know the tp offset, and we need to optimize before allocating
8496 dynamic relocations. */
8497
8498bfd_boolean
8499ppc64_elf_tls_optimize (struct bfd_link_info *info)
8500{
8501 bfd *ibfd;
8502 asection *sec;
8503 struct ppc_link_hash_table *htab;
8504 unsigned char *toc_ref;
8505 int pass;
8506
8507 if (!bfd_link_executable (info))
8508 return TRUE;
8509
8510 htab = ppc_hash_table (info);
8511 if (htab == NULL)
8512 return FALSE;
8513
8514 /* Make two passes over the relocs. On the first pass, mark toc
8515 entries involved with tls relocs, and check that tls relocs
8516 involved in setting up a tls_get_addr call are indeed followed by
8517 such a call. If they are not, we can't do any tls optimization.
8518 On the second pass twiddle tls_mask flags to notify
8519 relocate_section that optimization can be done, and adjust got
8520 and plt refcounts. */
8521 toc_ref = NULL;
8522 for (pass = 0; pass < 2; ++pass)
8523 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8524 {
8525 Elf_Internal_Sym *locsyms = NULL;
8526 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8527
8528 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8529 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8530 {
8531 Elf_Internal_Rela *relstart, *rel, *relend;
8532 bfd_boolean found_tls_get_addr_arg = 0;
8533
8534 /* Read the relocations. */
8535 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8536 info->keep_memory);
8537 if (relstart == NULL)
8538 {
8539 free (toc_ref);
8540 return FALSE;
8541 }
8542
8543 relend = relstart + sec->reloc_count;
8544 for (rel = relstart; rel < relend; rel++)
8545 {
8546 enum elf_ppc64_reloc_type r_type;
8547 unsigned long r_symndx;
8548 struct elf_link_hash_entry *h;
8549 Elf_Internal_Sym *sym;
8550 asection *sym_sec;
8551 unsigned char *tls_mask;
8552 unsigned char tls_set, tls_clear, tls_type = 0;
8553 bfd_vma value;
8554 bfd_boolean ok_tprel, is_local;
8555 long toc_ref_index = 0;
8556 int expecting_tls_get_addr = 0;
8557 bfd_boolean ret = FALSE;
8558
8559 r_symndx = ELF64_R_SYM (rel->r_info);
8560 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8561 r_symndx, ibfd))
8562 {
8563 err_free_rel:
8564 if (elf_section_data (sec)->relocs != relstart)
8565 free (relstart);
8566 if (toc_ref != NULL)
8567 free (toc_ref);
8568 if (locsyms != NULL
8569 && (elf_symtab_hdr (ibfd).contents
8570 != (unsigned char *) locsyms))
8571 free (locsyms);
8572 return ret;
8573 }
8574
8575 if (h != NULL)
8576 {
8577 if (h->root.type == bfd_link_hash_defined
8578 || h->root.type == bfd_link_hash_defweak)
8579 value = h->root.u.def.value;
8580 else if (h->root.type == bfd_link_hash_undefweak)
8581 value = 0;
8582 else
8583 {
8584 found_tls_get_addr_arg = 0;
8585 continue;
8586 }
8587 }
8588 else
8589 /* Symbols referenced by TLS relocs must be of type
8590 STT_TLS. So no need for .opd local sym adjust. */
8591 value = sym->st_value;
8592
8593 ok_tprel = FALSE;
8594 is_local = FALSE;
8595 if (h == NULL
8596 || !h->def_dynamic)
8597 {
8598 is_local = TRUE;
8599 if (h != NULL
8600 && h->root.type == bfd_link_hash_undefweak)
8601 ok_tprel = TRUE;
8602 else if (sym_sec != NULL
8603 && sym_sec->output_section != NULL)
8604 {
8605 value += sym_sec->output_offset;
8606 value += sym_sec->output_section->vma;
8607 value -= htab->elf.tls_sec->vma;
8608 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8609 < (bfd_vma) 1 << 32);
8610 }
8611 }
8612
8613 r_type = ELF64_R_TYPE (rel->r_info);
8614 /* If this section has old-style __tls_get_addr calls
8615 without marker relocs, then check that each
8616 __tls_get_addr call reloc is preceded by a reloc
8617 that conceivably belongs to the __tls_get_addr arg
8618 setup insn. If we don't find matching arg setup
8619 relocs, don't do any tls optimization. */
8620 if (pass == 0
8621 && sec->has_tls_get_addr_call
8622 && h != NULL
8623 && (h == &htab->tls_get_addr->elf
8624 || h == &htab->tls_get_addr_fd->elf)
8625 && !found_tls_get_addr_arg
8626 && is_branch_reloc (r_type))
8627 {
8628 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8629 "TLS optimization disabled\n"),
8630 ibfd, sec, rel->r_offset);
8631 ret = TRUE;
8632 goto err_free_rel;
8633 }
8634
8635 found_tls_get_addr_arg = 0;
8636 switch (r_type)
8637 {
8638 case R_PPC64_GOT_TLSLD16:
8639 case R_PPC64_GOT_TLSLD16_LO:
8640 expecting_tls_get_addr = 1;
8641 found_tls_get_addr_arg = 1;
8642 /* Fall through. */
8643
8644 case R_PPC64_GOT_TLSLD16_HI:
8645 case R_PPC64_GOT_TLSLD16_HA:
8646 /* These relocs should never be against a symbol
8647 defined in a shared lib. Leave them alone if
8648 that turns out to be the case. */
8649 if (!is_local)
8650 continue;
8651
8652 /* LD -> LE */
8653 tls_set = 0;
8654 tls_clear = TLS_LD;
8655 tls_type = TLS_TLS | TLS_LD;
8656 break;
8657
8658 case R_PPC64_GOT_TLSGD16:
8659 case R_PPC64_GOT_TLSGD16_LO:
8660 expecting_tls_get_addr = 1;
8661 found_tls_get_addr_arg = 1;
8662 /* Fall through. */
8663
8664 case R_PPC64_GOT_TLSGD16_HI:
8665 case R_PPC64_GOT_TLSGD16_HA:
8666 if (ok_tprel)
8667 /* GD -> LE */
8668 tls_set = 0;
8669 else
8670 /* GD -> IE */
8671 tls_set = TLS_TLS | TLS_TPRELGD;
8672 tls_clear = TLS_GD;
8673 tls_type = TLS_TLS | TLS_GD;
8674 break;
8675
8676 case R_PPC64_GOT_TPREL16_DS:
8677 case R_PPC64_GOT_TPREL16_LO_DS:
8678 case R_PPC64_GOT_TPREL16_HI:
8679 case R_PPC64_GOT_TPREL16_HA:
8680 if (ok_tprel)
8681 {
8682 /* IE -> LE */
8683 tls_set = 0;
8684 tls_clear = TLS_TPREL;
8685 tls_type = TLS_TLS | TLS_TPREL;
8686 break;
8687 }
8688 continue;
8689
8690 case R_PPC64_TLSGD:
8691 case R_PPC64_TLSLD:
8692 found_tls_get_addr_arg = 1;
8693 /* Fall through. */
8694
8695 case R_PPC64_TLS:
8696 case R_PPC64_TOC16:
8697 case R_PPC64_TOC16_LO:
8698 if (sym_sec == NULL || sym_sec != toc)
8699 continue;
8700
8701 /* Mark this toc entry as referenced by a TLS
8702 code sequence. We can do that now in the
8703 case of R_PPC64_TLS, and after checking for
8704 tls_get_addr for the TOC16 relocs. */
8705 if (toc_ref == NULL)
8706 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8707 if (toc_ref == NULL)
8708 goto err_free_rel;
8709
8710 if (h != NULL)
8711 value = h->root.u.def.value;
8712 else
8713 value = sym->st_value;
8714 value += rel->r_addend;
8715 if (value % 8 != 0)
8716 continue;
8717 BFD_ASSERT (value < toc->size
8718 && toc->output_offset % 8 == 0);
8719 toc_ref_index = (value + toc->output_offset) / 8;
8720 if (r_type == R_PPC64_TLS
8721 || r_type == R_PPC64_TLSGD
8722 || r_type == R_PPC64_TLSLD)
8723 {
8724 toc_ref[toc_ref_index] = 1;
8725 continue;
8726 }
8727
8728 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8729 continue;
8730
8731 tls_set = 0;
8732 tls_clear = 0;
8733 expecting_tls_get_addr = 2;
8734 break;
8735
8736 case R_PPC64_TPREL64:
8737 if (pass == 0
8738 || sec != toc
8739 || toc_ref == NULL
8740 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8741 continue;
8742 if (ok_tprel)
8743 {
8744 /* IE -> LE */
8745 tls_set = TLS_EXPLICIT;
8746 tls_clear = TLS_TPREL;
8747 break;
8748 }
8749 continue;
8750
8751 case R_PPC64_DTPMOD64:
8752 if (pass == 0
8753 || sec != toc
8754 || toc_ref == NULL
8755 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8756 continue;
8757 if (rel + 1 < relend
8758 && (rel[1].r_info
8759 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8760 && rel[1].r_offset == rel->r_offset + 8)
8761 {
8762 if (ok_tprel)
8763 /* GD -> LE */
8764 tls_set = TLS_EXPLICIT | TLS_GD;
8765 else
8766 /* GD -> IE */
8767 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8768 tls_clear = TLS_GD;
8769 }
8770 else
8771 {
8772 if (!is_local)
8773 continue;
8774
8775 /* LD -> LE */
8776 tls_set = TLS_EXPLICIT;
8777 tls_clear = TLS_LD;
8778 }
8779 break;
8780
8781 default:
8782 continue;
8783 }
8784
8785 if (pass == 0)
8786 {
8787 if (!expecting_tls_get_addr
8788 || !sec->has_tls_get_addr_call)
8789 continue;
8790
8791 if (rel + 1 < relend
8792 && branch_reloc_hash_match (ibfd, rel + 1,
8793 htab->tls_get_addr,
8794 htab->tls_get_addr_fd))
8795 {
8796 if (expecting_tls_get_addr == 2)
8797 {
8798 /* Check for toc tls entries. */
8799 unsigned char *toc_tls;
8800 int retval;
8801
8802 retval = get_tls_mask (&toc_tls, NULL, NULL,
8803 &locsyms,
8804 rel, ibfd);
8805 if (retval == 0)
8806 goto err_free_rel;
8807 if (toc_tls != NULL)
8808 {
8809 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8810 found_tls_get_addr_arg = 1;
8811 if (retval > 1)
8812 toc_ref[toc_ref_index] = 1;
8813 }
8814 }
8815 continue;
8816 }
8817
8818 if (expecting_tls_get_addr != 1)
8819 continue;
8820
8821 /* Uh oh, we didn't find the expected call. We
8822 could just mark this symbol to exclude it
8823 from tls optimization but it's safer to skip
8824 the entire optimization. */
8825 /* xgettext:c-format */
8826 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8827 "TLS optimization disabled\n"),
8828 ibfd, sec, rel->r_offset);
8829 ret = TRUE;
8830 goto err_free_rel;
8831 }
8832
8833 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8834 {
8835 struct plt_entry *ent;
8836 for (ent = htab->tls_get_addr->elf.plt.plist;
8837 ent != NULL;
8838 ent = ent->next)
8839 if (ent->addend == 0)
8840 {
8841 if (ent->plt.refcount > 0)
8842 {
8843 ent->plt.refcount -= 1;
8844 expecting_tls_get_addr = 0;
8845 }
8846 break;
8847 }
8848 }
8849
8850 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8851 {
8852 struct plt_entry *ent;
8853 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8854 ent != NULL;
8855 ent = ent->next)
8856 if (ent->addend == 0)
8857 {
8858 if (ent->plt.refcount > 0)
8859 ent->plt.refcount -= 1;
8860 break;
8861 }
8862 }
8863
8864 if (tls_clear == 0)
8865 continue;
8866
8867 if ((tls_set & TLS_EXPLICIT) == 0)
8868 {
8869 struct got_entry *ent;
8870
8871 /* Adjust got entry for this reloc. */
8872 if (h != NULL)
8873 ent = h->got.glist;
8874 else
8875 ent = elf_local_got_ents (ibfd)[r_symndx];
8876
8877 for (; ent != NULL; ent = ent->next)
8878 if (ent->addend == rel->r_addend
8879 && ent->owner == ibfd
8880 && ent->tls_type == tls_type)
8881 break;
8882 if (ent == NULL)
8883 abort ();
8884
8885 if (tls_set == 0)
8886 {
8887 /* We managed to get rid of a got entry. */
8888 if (ent->got.refcount > 0)
8889 ent->got.refcount -= 1;
8890 }
8891 }
8892 else
8893 {
8894 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8895 we'll lose one or two dyn relocs. */
8896 if (!dec_dynrel_count (rel->r_info, sec, info,
8897 NULL, h, sym))
8898 return FALSE;
8899
8900 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8901 {
8902 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8903 NULL, h, sym))
8904 return FALSE;
8905 }
8906 }
8907
8908 *tls_mask |= tls_set;
8909 *tls_mask &= ~tls_clear;
8910 }
8911
8912 if (elf_section_data (sec)->relocs != relstart)
8913 free (relstart);
8914 }
8915
8916 if (locsyms != NULL
8917 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8918 {
8919 if (!info->keep_memory)
8920 free (locsyms);
8921 else
8922 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8923 }
8924 }
8925
8926 if (toc_ref != NULL)
8927 free (toc_ref);
8928 return TRUE;
8929}
8930
8931/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8932 the values of any global symbols in a toc section that has been
8933 edited. Globals in toc sections should be a rarity, so this function
8934 sets a flag if any are found in toc sections other than the one just
8935 edited, so that further hash table traversals can be avoided. */
8936
8937struct adjust_toc_info
8938{
8939 asection *toc;
8940 unsigned long *skip;
8941 bfd_boolean global_toc_syms;
8942};
8943
8944enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8945
8946static bfd_boolean
8947adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8948{
8949 struct ppc_link_hash_entry *eh;
8950 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8951 unsigned long i;
8952
8953 if (h->root.type != bfd_link_hash_defined
8954 && h->root.type != bfd_link_hash_defweak)
8955 return TRUE;
8956
8957 eh = (struct ppc_link_hash_entry *) h;
8958 if (eh->adjust_done)
8959 return TRUE;
8960
8961 if (eh->elf.root.u.def.section == toc_inf->toc)
8962 {
8963 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8964 i = toc_inf->toc->rawsize >> 3;
8965 else
8966 i = eh->elf.root.u.def.value >> 3;
8967
8968 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8969 {
8970 _bfd_error_handler
8971 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8972 do
8973 ++i;
8974 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8975 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8976 }
8977
8978 eh->elf.root.u.def.value -= toc_inf->skip[i];
8979 eh->adjust_done = 1;
8980 }
8981 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8982 toc_inf->global_toc_syms = TRUE;
8983
8984 return TRUE;
8985}
8986
8987/* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8988 on a _LO variety toc/got reloc. */
8989
8990static bfd_boolean
8991ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8992{
8993 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8994 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8995 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8996 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8997 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8998 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8999 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
9000 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
9001 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
9002 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
9003 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
9004 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
9005 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
9006 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
9007 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
9008 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
9009 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
9010 /* Exclude lfqu by testing reloc. If relocs are ever
9011 defined for the reduced D field in psq_lu then those
9012 will need testing too. */
9013 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9014 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
9015 && (insn & 1) == 0)
9016 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
9017 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
9018 /* Exclude stfqu. psq_stu as above for psq_lu. */
9019 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
9020 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
9021 && (insn & 1) == 0));
9022}
9023
9024/* Examine all relocs referencing .toc sections in order to remove
9025 unused .toc entries. */
9026
9027bfd_boolean
9028ppc64_elf_edit_toc (struct bfd_link_info *info)
9029{
9030 bfd *ibfd;
9031 struct adjust_toc_info toc_inf;
9032 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9033
9034 htab->do_toc_opt = 1;
9035 toc_inf.global_toc_syms = TRUE;
9036 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9037 {
9038 asection *toc, *sec;
9039 Elf_Internal_Shdr *symtab_hdr;
9040 Elf_Internal_Sym *local_syms;
9041 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
9042 unsigned long *skip, *drop;
9043 unsigned char *used;
9044 unsigned char *keep, last, some_unused;
9045
9046 if (!is_ppc64_elf (ibfd))
9047 continue;
9048
9049 toc = bfd_get_section_by_name (ibfd, ".toc");
9050 if (toc == NULL
9051 || toc->size == 0
9052 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
9053 || discarded_section (toc))
9054 continue;
9055
9056 toc_relocs = NULL;
9057 local_syms = NULL;
9058 symtab_hdr = &elf_symtab_hdr (ibfd);
9059
9060 /* Look at sections dropped from the final link. */
9061 skip = NULL;
9062 relstart = NULL;
9063 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9064 {
9065 if (sec->reloc_count == 0
9066 || !discarded_section (sec)
9067 || get_opd_info (sec)
9068 || (sec->flags & SEC_ALLOC) == 0
9069 || (sec->flags & SEC_DEBUGGING) != 0)
9070 continue;
9071
9072 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9073 if (relstart == NULL)
9074 goto error_ret;
9075
9076 /* Run through the relocs to see which toc entries might be
9077 unused. */
9078 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9079 {
9080 enum elf_ppc64_reloc_type r_type;
9081 unsigned long r_symndx;
9082 asection *sym_sec;
9083 struct elf_link_hash_entry *h;
9084 Elf_Internal_Sym *sym;
9085 bfd_vma val;
9086
9087 r_type = ELF64_R_TYPE (rel->r_info);
9088 switch (r_type)
9089 {
9090 default:
9091 continue;
9092
9093 case R_PPC64_TOC16:
9094 case R_PPC64_TOC16_LO:
9095 case R_PPC64_TOC16_HI:
9096 case R_PPC64_TOC16_HA:
9097 case R_PPC64_TOC16_DS:
9098 case R_PPC64_TOC16_LO_DS:
9099 break;
9100 }
9101
9102 r_symndx = ELF64_R_SYM (rel->r_info);
9103 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9104 r_symndx, ibfd))
9105 goto error_ret;
9106
9107 if (sym_sec != toc)
9108 continue;
9109
9110 if (h != NULL)
9111 val = h->root.u.def.value;
9112 else
9113 val = sym->st_value;
9114 val += rel->r_addend;
9115
9116 if (val >= toc->size)
9117 continue;
9118
9119 /* Anything in the toc ought to be aligned to 8 bytes.
9120 If not, don't mark as unused. */
9121 if (val & 7)
9122 continue;
9123
9124 if (skip == NULL)
9125 {
9126 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9127 if (skip == NULL)
9128 goto error_ret;
9129 }
9130
9131 skip[val >> 3] = ref_from_discarded;
9132 }
9133
9134 if (elf_section_data (sec)->relocs != relstart)
9135 free (relstart);
9136 }
9137
9138 /* For largetoc loads of address constants, we can convert
9139 . addis rx,2,addr@got@ha
9140 . ld ry,addr@got@l(rx)
9141 to
9142 . addis rx,2,addr@toc@ha
9143 . addi ry,rx,addr@toc@l
9144 when addr is within 2G of the toc pointer. This then means
9145 that the word storing "addr" in the toc is no longer needed. */
9146
9147 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9148 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9149 && toc->reloc_count != 0)
9150 {
9151 /* Read toc relocs. */
9152 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9153 info->keep_memory);
9154 if (toc_relocs == NULL)
9155 goto error_ret;
9156
9157 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9158 {
9159 enum elf_ppc64_reloc_type r_type;
9160 unsigned long r_symndx;
9161 asection *sym_sec;
9162 struct elf_link_hash_entry *h;
9163 Elf_Internal_Sym *sym;
9164 bfd_vma val, addr;
9165
9166 r_type = ELF64_R_TYPE (rel->r_info);
9167 if (r_type != R_PPC64_ADDR64)
9168 continue;
9169
9170 r_symndx = ELF64_R_SYM (rel->r_info);
9171 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9172 r_symndx, ibfd))
9173 goto error_ret;
9174
9175 if (sym_sec == NULL
9176 || sym_sec->output_section == NULL
9177 || discarded_section (sym_sec))
9178 continue;
9179
9180 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9181 continue;
9182
9183 if (h != NULL)
9184 {
9185 if (h->type == STT_GNU_IFUNC)
9186 continue;
9187 val = h->root.u.def.value;
9188 }
9189 else
9190 {
9191 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9192 continue;
9193 val = sym->st_value;
9194 }
9195 val += rel->r_addend;
9196 val += sym_sec->output_section->vma + sym_sec->output_offset;
9197
9198 /* We don't yet know the exact toc pointer value, but we
9199 know it will be somewhere in the toc section. Don't
9200 optimize if the difference from any possible toc
9201 pointer is outside [ff..f80008000, 7fff7fff]. */
9202 addr = toc->output_section->vma + TOC_BASE_OFF;
9203 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9204 continue;
9205
9206 addr = toc->output_section->vma + toc->output_section->rawsize;
9207 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9208 continue;
9209
9210 if (skip == NULL)
9211 {
9212 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9213 if (skip == NULL)
9214 goto error_ret;
9215 }
9216
9217 skip[rel->r_offset >> 3]
9218 |= can_optimize | ((rel - toc_relocs) << 2);
9219 }
9220 }
9221
9222 if (skip == NULL)
9223 continue;
9224
9225 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9226 if (used == NULL)
9227 {
9228 error_ret:
9229 if (local_syms != NULL
9230 && symtab_hdr->contents != (unsigned char *) local_syms)
9231 free (local_syms);
9232 if (sec != NULL
9233 && relstart != NULL
9234 && elf_section_data (sec)->relocs != relstart)
9235 free (relstart);
9236 if (toc_relocs != NULL
9237 && elf_section_data (toc)->relocs != toc_relocs)
9238 free (toc_relocs);
9239 if (skip != NULL)
9240 free (skip);
9241 return FALSE;
9242 }
9243
9244 /* Now check all kept sections that might reference the toc.
9245 Check the toc itself last. */
9246 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9247 : ibfd->sections);
9248 sec != NULL;
9249 sec = (sec == toc ? NULL
9250 : sec->next == NULL ? toc
9251 : sec->next == toc && toc->next ? toc->next
9252 : sec->next))
9253 {
9254 int repeat;
9255
9256 if (sec->reloc_count == 0
9257 || discarded_section (sec)
9258 || get_opd_info (sec)
9259 || (sec->flags & SEC_ALLOC) == 0
9260 || (sec->flags & SEC_DEBUGGING) != 0)
9261 continue;
9262
9263 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9264 info->keep_memory);
9265 if (relstart == NULL)
9266 {
9267 free (used);
9268 goto error_ret;
9269 }
9270
9271 /* Mark toc entries referenced as used. */
9272 do
9273 {
9274 repeat = 0;
9275 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9276 {
9277 enum elf_ppc64_reloc_type r_type;
9278 unsigned long r_symndx;
9279 asection *sym_sec;
9280 struct elf_link_hash_entry *h;
9281 Elf_Internal_Sym *sym;
9282 bfd_vma val;
9283 enum {no_check, check_lo, check_ha} insn_check;
9284
9285 r_type = ELF64_R_TYPE (rel->r_info);
9286 switch (r_type)
9287 {
9288 default:
9289 insn_check = no_check;
9290 break;
9291
9292 case R_PPC64_GOT_TLSLD16_HA:
9293 case R_PPC64_GOT_TLSGD16_HA:
9294 case R_PPC64_GOT_TPREL16_HA:
9295 case R_PPC64_GOT_DTPREL16_HA:
9296 case R_PPC64_GOT16_HA:
9297 case R_PPC64_TOC16_HA:
9298 insn_check = check_ha;
9299 break;
9300
9301 case R_PPC64_GOT_TLSLD16_LO:
9302 case R_PPC64_GOT_TLSGD16_LO:
9303 case R_PPC64_GOT_TPREL16_LO_DS:
9304 case R_PPC64_GOT_DTPREL16_LO_DS:
9305 case R_PPC64_GOT16_LO:
9306 case R_PPC64_GOT16_LO_DS:
9307 case R_PPC64_TOC16_LO:
9308 case R_PPC64_TOC16_LO_DS:
9309 insn_check = check_lo;
9310 break;
9311 }
9312
9313 if (insn_check != no_check)
9314 {
9315 bfd_vma off = rel->r_offset & ~3;
9316 unsigned char buf[4];
9317 unsigned int insn;
9318
9319 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9320 {
9321 free (used);
9322 goto error_ret;
9323 }
9324 insn = bfd_get_32 (ibfd, buf);
9325 if (insn_check == check_lo
9326 ? !ok_lo_toc_insn (insn, r_type)
9327 : ((insn & ((0x3f << 26) | 0x1f << 16))
9328 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9329 {
9330 char str[12];
9331
9332 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9333 sprintf (str, "%#08x", insn);
9334 info->callbacks->einfo
9335 /* xgettext:c-format */
9336 (_("%H: toc optimization is not supported for"
9337 " %s instruction.\n"),
9338 ibfd, sec, rel->r_offset & ~3, str);
9339 }
9340 }
9341
9342 switch (r_type)
9343 {
9344 case R_PPC64_TOC16:
9345 case R_PPC64_TOC16_LO:
9346 case R_PPC64_TOC16_HI:
9347 case R_PPC64_TOC16_HA:
9348 case R_PPC64_TOC16_DS:
9349 case R_PPC64_TOC16_LO_DS:
9350 /* In case we're taking addresses of toc entries. */
9351 case R_PPC64_ADDR64:
9352 break;
9353
9354 default:
9355 continue;
9356 }
9357
9358 r_symndx = ELF64_R_SYM (rel->r_info);
9359 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9360 r_symndx, ibfd))
9361 {
9362 free (used);
9363 goto error_ret;
9364 }
9365
9366 if (sym_sec != toc)
9367 continue;
9368
9369 if (h != NULL)
9370 val = h->root.u.def.value;
9371 else
9372 val = sym->st_value;
9373 val += rel->r_addend;
9374
9375 if (val >= toc->size)
9376 continue;
9377
9378 if ((skip[val >> 3] & can_optimize) != 0)
9379 {
9380 bfd_vma off;
9381 unsigned char opc;
9382
9383 switch (r_type)
9384 {
9385 case R_PPC64_TOC16_HA:
9386 break;
9387
9388 case R_PPC64_TOC16_LO_DS:
9389 off = rel->r_offset;
9390 off += (bfd_big_endian (ibfd) ? -2 : 3);
9391 if (!bfd_get_section_contents (ibfd, sec, &opc,
9392 off, 1))
9393 {
9394 free (used);
9395 goto error_ret;
9396 }
9397 if ((opc & (0x3f << 2)) == (58u << 2))
9398 break;
9399 /* Fall through. */
9400
9401 default:
9402 /* Wrong sort of reloc, or not a ld. We may
9403 as well clear ref_from_discarded too. */
9404 skip[val >> 3] = 0;
9405 }
9406 }
9407
9408 if (sec != toc)
9409 used[val >> 3] = 1;
9410 /* For the toc section, we only mark as used if this
9411 entry itself isn't unused. */
9412 else if ((used[rel->r_offset >> 3]
9413 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9414 && !used[val >> 3])
9415 {
9416 /* Do all the relocs again, to catch reference
9417 chains. */
9418 repeat = 1;
9419 used[val >> 3] = 1;
9420 }
9421 }
9422 }
9423 while (repeat);
9424
9425 if (elf_section_data (sec)->relocs != relstart)
9426 free (relstart);
9427 }
9428
9429 /* Merge the used and skip arrays. Assume that TOC
9430 doublewords not appearing as either used or unused belong
9431 to an entry more than one doubleword in size. */
9432 for (drop = skip, keep = used, last = 0, some_unused = 0;
9433 drop < skip + (toc->size + 7) / 8;
9434 ++drop, ++keep)
9435 {
9436 if (*keep)
9437 {
9438 *drop &= ~ref_from_discarded;
9439 if ((*drop & can_optimize) != 0)
9440 some_unused = 1;
9441 last = 0;
9442 }
9443 else if ((*drop & ref_from_discarded) != 0)
9444 {
9445 some_unused = 1;
9446 last = ref_from_discarded;
9447 }
9448 else
9449 *drop = last;
9450 }
9451
9452 free (used);
9453
9454 if (some_unused)
9455 {
9456 bfd_byte *contents, *src;
9457 unsigned long off;
9458 Elf_Internal_Sym *sym;
9459 bfd_boolean local_toc_syms = FALSE;
9460
9461 /* Shuffle the toc contents, and at the same time convert the
9462 skip array from booleans into offsets. */
9463 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9464 goto error_ret;
9465
9466 elf_section_data (toc)->this_hdr.contents = contents;
9467
9468 for (src = contents, off = 0, drop = skip;
9469 src < contents + toc->size;
9470 src += 8, ++drop)
9471 {
9472 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9473 off += 8;
9474 else if (off != 0)
9475 {
9476 *drop = off;
9477 memcpy (src - off, src, 8);
9478 }
9479 }
9480 *drop = off;
9481 toc->rawsize = toc->size;
9482 toc->size = src - contents - off;
9483
9484 /* Adjust addends for relocs against the toc section sym,
9485 and optimize any accesses we can. */
9486 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9487 {
9488 if (sec->reloc_count == 0
9489 || discarded_section (sec))
9490 continue;
9491
9492 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9493 info->keep_memory);
9494 if (relstart == NULL)
9495 goto error_ret;
9496
9497 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9498 {
9499 enum elf_ppc64_reloc_type r_type;
9500 unsigned long r_symndx;
9501 asection *sym_sec;
9502 struct elf_link_hash_entry *h;
9503 bfd_vma val;
9504
9505 r_type = ELF64_R_TYPE (rel->r_info);
9506 switch (r_type)
9507 {
9508 default:
9509 continue;
9510
9511 case R_PPC64_TOC16:
9512 case R_PPC64_TOC16_LO:
9513 case R_PPC64_TOC16_HI:
9514 case R_PPC64_TOC16_HA:
9515 case R_PPC64_TOC16_DS:
9516 case R_PPC64_TOC16_LO_DS:
9517 case R_PPC64_ADDR64:
9518 break;
9519 }
9520
9521 r_symndx = ELF64_R_SYM (rel->r_info);
9522 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9523 r_symndx, ibfd))
9524 goto error_ret;
9525
9526 if (sym_sec != toc)
9527 continue;
9528
9529 if (h != NULL)
9530 val = h->root.u.def.value;
9531 else
9532 {
9533 val = sym->st_value;
9534 if (val != 0)
9535 local_toc_syms = TRUE;
9536 }
9537
9538 val += rel->r_addend;
9539
9540 if (val > toc->rawsize)
9541 val = toc->rawsize;
9542 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9543 continue;
9544 else if ((skip[val >> 3] & can_optimize) != 0)
9545 {
9546 Elf_Internal_Rela *tocrel
9547 = toc_relocs + (skip[val >> 3] >> 2);
9548 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9549
9550 switch (r_type)
9551 {
9552 case R_PPC64_TOC16_HA:
9553 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9554 break;
9555
9556 case R_PPC64_TOC16_LO_DS:
9557 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9558 break;
9559
9560 default:
9561 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9562 ppc_howto_init ();
9563 info->callbacks->einfo
9564 /* xgettext:c-format */
9565 (_("%H: %s references "
9566 "optimized away TOC entry\n"),
9567 ibfd, sec, rel->r_offset,
9568 ppc64_elf_howto_table[r_type]->name);
9569 bfd_set_error (bfd_error_bad_value);
9570 goto error_ret;
9571 }
9572 rel->r_addend = tocrel->r_addend;
9573 elf_section_data (sec)->relocs = relstart;
9574 continue;
9575 }
9576
9577 if (h != NULL || sym->st_value != 0)
9578 continue;
9579
9580 rel->r_addend -= skip[val >> 3];
9581 elf_section_data (sec)->relocs = relstart;
9582 }
9583
9584 if (elf_section_data (sec)->relocs != relstart)
9585 free (relstart);
9586 }
9587
9588 /* We shouldn't have local or global symbols defined in the TOC,
9589 but handle them anyway. */
9590 if (local_syms != NULL)
9591 for (sym = local_syms;
9592 sym < local_syms + symtab_hdr->sh_info;
9593 ++sym)
9594 if (sym->st_value != 0
9595 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9596 {
9597 unsigned long i;
9598
9599 if (sym->st_value > toc->rawsize)
9600 i = toc->rawsize >> 3;
9601 else
9602 i = sym->st_value >> 3;
9603
9604 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9605 {
9606 if (local_toc_syms)
9607 _bfd_error_handler
9608 (_("%s defined on removed toc entry"),
9609 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9610 do
9611 ++i;
9612 while ((skip[i] & (ref_from_discarded | can_optimize)));
9613 sym->st_value = (bfd_vma) i << 3;
9614 }
9615
9616 sym->st_value -= skip[i];
9617 symtab_hdr->contents = (unsigned char *) local_syms;
9618 }
9619
9620 /* Adjust any global syms defined in this toc input section. */
9621 if (toc_inf.global_toc_syms)
9622 {
9623 toc_inf.toc = toc;
9624 toc_inf.skip = skip;
9625 toc_inf.global_toc_syms = FALSE;
9626 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9627 &toc_inf);
9628 }
9629
9630 if (toc->reloc_count != 0)
9631 {
9632 Elf_Internal_Shdr *rel_hdr;
9633 Elf_Internal_Rela *wrel;
9634 bfd_size_type sz;
9635
9636 /* Remove unused toc relocs, and adjust those we keep. */
9637 if (toc_relocs == NULL)
9638 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9639 info->keep_memory);
9640 if (toc_relocs == NULL)
9641 goto error_ret;
9642
9643 wrel = toc_relocs;
9644 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9645 if ((skip[rel->r_offset >> 3]
9646 & (ref_from_discarded | can_optimize)) == 0)
9647 {
9648 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9649 wrel->r_info = rel->r_info;
9650 wrel->r_addend = rel->r_addend;
9651 ++wrel;
9652 }
9653 else if (!dec_dynrel_count (rel->r_info, toc, info,
9654 &local_syms, NULL, NULL))
9655 goto error_ret;
9656
9657 elf_section_data (toc)->relocs = toc_relocs;
9658 toc->reloc_count = wrel - toc_relocs;
9659 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9660 sz = rel_hdr->sh_entsize;
9661 rel_hdr->sh_size = toc->reloc_count * sz;
9662 }
9663 }
9664 else if (toc_relocs != NULL
9665 && elf_section_data (toc)->relocs != toc_relocs)
9666 free (toc_relocs);
9667
9668 if (local_syms != NULL
9669 && symtab_hdr->contents != (unsigned char *) local_syms)
9670 {
9671 if (!info->keep_memory)
9672 free (local_syms);
9673 else
9674 symtab_hdr->contents = (unsigned char *) local_syms;
9675 }
9676 free (skip);
9677 }
9678
9679 return TRUE;
9680}
9681
9682/* Return true iff input section I references the TOC using
9683 instructions limited to +/-32k offsets. */
9684
9685bfd_boolean
9686ppc64_elf_has_small_toc_reloc (asection *i)
9687{
9688 return (is_ppc64_elf (i->owner)
9689 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9690}
9691
9692/* Allocate space for one GOT entry. */
9693
9694static void
9695allocate_got (struct elf_link_hash_entry *h,
9696 struct bfd_link_info *info,
9697 struct got_entry *gent)
9698{
9699 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9700 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9701 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9702 ? 16 : 8);
9703 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9704 ? 2 : 1) * sizeof (Elf64_External_Rela);
9705 asection *got = ppc64_elf_tdata (gent->owner)->got;
9706
9707 gent->got.offset = got->size;
9708 got->size += entsize;
9709
9710 if (h->type == STT_GNU_IFUNC)
9711 {
9712 htab->elf.irelplt->size += rentsize;
9713 htab->got_reli_size += rentsize;
9714 }
9715 else if ((bfd_link_pic (info)
9716 || (htab->elf.dynamic_sections_created
9717 && h->dynindx != -1
9718 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9719 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9720 {
9721 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9722 relgot->size += rentsize;
9723 }
9724}
9725
9726/* This function merges got entries in the same toc group. */
9727
9728static void
9729merge_got_entries (struct got_entry **pent)
9730{
9731 struct got_entry *ent, *ent2;
9732
9733 for (ent = *pent; ent != NULL; ent = ent->next)
9734 if (!ent->is_indirect)
9735 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9736 if (!ent2->is_indirect
9737 && ent2->addend == ent->addend
9738 && ent2->tls_type == ent->tls_type
9739 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9740 {
9741 ent2->is_indirect = TRUE;
9742 ent2->got.ent = ent;
9743 }
9744}
9745
9746/* If H is undefined, make it dynamic if that makes sense. */
9747
9748static bfd_boolean
9749ensure_undef_dynamic (struct bfd_link_info *info,
9750 struct elf_link_hash_entry *h)
9751{
9752 struct elf_link_hash_table *htab = elf_hash_table (info);
9753
9754 if (htab->dynamic_sections_created
9755 && ((info->dynamic_undefined_weak != 0
9756 && h->root.type == bfd_link_hash_undefweak)
9757 || h->root.type == bfd_link_hash_undefined)
9758 && h->dynindx == -1
9759 && !h->forced_local
9760 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9761 return bfd_elf_link_record_dynamic_symbol (info, h);
9762 return TRUE;
9763}
9764
9765/* Allocate space in .plt, .got and associated reloc sections for
9766 dynamic relocs. */
9767
9768static bfd_boolean
9769allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9770{
9771 struct bfd_link_info *info;
9772 struct ppc_link_hash_table *htab;
9773 asection *s;
9774 struct ppc_link_hash_entry *eh;
9775 struct got_entry **pgent, *gent;
9776
9777 if (h->root.type == bfd_link_hash_indirect)
9778 return TRUE;
9779
9780 info = (struct bfd_link_info *) inf;
9781 htab = ppc_hash_table (info);
9782 if (htab == NULL)
9783 return FALSE;
9784
9785 eh = (struct ppc_link_hash_entry *) h;
9786 /* Run through the TLS GD got entries first if we're changing them
9787 to TPREL. */
9788 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9789 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9790 if (gent->got.refcount > 0
9791 && (gent->tls_type & TLS_GD) != 0)
9792 {
9793 /* This was a GD entry that has been converted to TPREL. If
9794 there happens to be a TPREL entry we can use that one. */
9795 struct got_entry *ent;
9796 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9797 if (ent->got.refcount > 0
9798 && (ent->tls_type & TLS_TPREL) != 0
9799 && ent->addend == gent->addend
9800 && ent->owner == gent->owner)
9801 {
9802 gent->got.refcount = 0;
9803 break;
9804 }
9805
9806 /* If not, then we'll be using our own TPREL entry. */
9807 if (gent->got.refcount != 0)
9808 gent->tls_type = TLS_TLS | TLS_TPREL;
9809 }
9810
9811 /* Remove any list entry that won't generate a word in the GOT before
9812 we call merge_got_entries. Otherwise we risk merging to empty
9813 entries. */
9814 pgent = &h->got.glist;
9815 while ((gent = *pgent) != NULL)
9816 if (gent->got.refcount > 0)
9817 {
9818 if ((gent->tls_type & TLS_LD) != 0
9819 && !h->def_dynamic)
9820 {
9821 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9822 *pgent = gent->next;
9823 }
9824 else
9825 pgent = &gent->next;
9826 }
9827 else
9828 *pgent = gent->next;
9829
9830 if (!htab->do_multi_toc)
9831 merge_got_entries (&h->got.glist);
9832
9833 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9834 if (!gent->is_indirect)
9835 {
9836 /* Make sure this symbol is output as a dynamic symbol. */
9837 if (!ensure_undef_dynamic (info, h))
9838 return FALSE;
9839
9840 if (!is_ppc64_elf (gent->owner))
9841 abort ();
9842
9843 allocate_got (h, info, gent);
9844 }
9845
9846 /* If no dynamic sections we can't have dynamic relocs, except for
9847 IFUNCs which are handled even in static executables. */
9848 if (!htab->elf.dynamic_sections_created
9849 && h->type != STT_GNU_IFUNC)
9850 eh->dyn_relocs = NULL;
9851
9852 /* Also discard relocs on undefined weak syms with non-default
9853 visibility, or when dynamic_undefined_weak says so. */
9854 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9855 eh->dyn_relocs = NULL;
9856
9857 if (eh->dyn_relocs != NULL)
9858 {
9859 struct elf_dyn_relocs *p, **pp;
9860
9861 /* In the shared -Bsymbolic case, discard space allocated for
9862 dynamic pc-relative relocs against symbols which turn out to
9863 be defined in regular objects. For the normal shared case,
9864 discard space for relocs that have become local due to symbol
9865 visibility changes. */
9866
9867 if (bfd_link_pic (info))
9868 {
9869 /* Relocs that use pc_count are those that appear on a call
9870 insn, or certain REL relocs (see must_be_dyn_reloc) that
9871 can be generated via assembly. We want calls to
9872 protected symbols to resolve directly to the function
9873 rather than going via the plt. If people want function
9874 pointer comparisons to work as expected then they should
9875 avoid writing weird assembly. */
9876 if (SYMBOL_CALLS_LOCAL (info, h))
9877 {
9878 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9879 {
9880 p->count -= p->pc_count;
9881 p->pc_count = 0;
9882 if (p->count == 0)
9883 *pp = p->next;
9884 else
9885 pp = &p->next;
9886 }
9887 }
9888
9889 if (eh->dyn_relocs != NULL)
9890 {
9891 /* Make sure this symbol is output as a dynamic symbol. */
9892 if (!ensure_undef_dynamic (info, h))
9893 return FALSE;
9894 }
9895 }
9896 else if (h->type == STT_GNU_IFUNC)
9897 {
9898 /* A plt entry is always created when making direct calls to
9899 an ifunc, even when building a static executable, but
9900 that doesn't cover all cases. We may have only an ifunc
9901 initialised function pointer for a given ifunc symbol.
9902
9903 For ELFv2, dynamic relocations are not required when
9904 generating a global entry PLT stub. */
9905 if (abiversion (info->output_bfd) >= 2)
9906 {
9907 if (global_entry_stub (h))
9908 eh->dyn_relocs = NULL;
9909 }
9910
9911 /* For ELFv1 we have function descriptors. Descriptors need
9912 to be treated like PLT entries and thus have dynamic
9913 relocations. One exception is when the function
9914 descriptor is copied into .dynbss (which should only
9915 happen with ancient versions of gcc). */
9916 else if (h->needs_copy)
9917 eh->dyn_relocs = NULL;
9918 }
9919 else if (ELIMINATE_COPY_RELOCS)
9920 {
9921 /* For the non-pic case, discard space for relocs against
9922 symbols which turn out to need copy relocs or are not
9923 dynamic. */
9924 if (!h->non_got_ref
9925 && !h->def_regular)
9926 {
9927 /* Make sure this symbol is output as a dynamic symbol. */
9928 if (!ensure_undef_dynamic (info, h))
9929 return FALSE;
9930
9931 if (h->dynindx == -1)
9932 eh->dyn_relocs = NULL;
9933 }
9934 else
9935 eh->dyn_relocs = NULL;
9936 }
9937
9938 /* Finally, allocate space. */
9939 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9940 {
9941 asection *sreloc = elf_section_data (p->sec)->sreloc;
9942 if (eh->elf.type == STT_GNU_IFUNC)
9943 sreloc = htab->elf.irelplt;
9944 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9945 }
9946 }
9947
9948 if ((htab->elf.dynamic_sections_created
9949 && h->dynindx != -1)
9950 || h->type == STT_GNU_IFUNC)
9951 {
9952 struct plt_entry *pent;
9953 bfd_boolean doneone = FALSE;
9954 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9955 if (pent->plt.refcount > 0)
9956 {
9957 if (!htab->elf.dynamic_sections_created
9958 || h->dynindx == -1)
9959 {
9960 s = htab->elf.iplt;
9961 pent->plt.offset = s->size;
9962 s->size += PLT_ENTRY_SIZE (htab);
9963 s = htab->elf.irelplt;
9964 }
9965 else
9966 {
9967 /* If this is the first .plt entry, make room for the special
9968 first entry. */
9969 s = htab->elf.splt;
9970 if (s->size == 0)
9971 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9972
9973 pent->plt.offset = s->size;
9974
9975 /* Make room for this entry. */
9976 s->size += PLT_ENTRY_SIZE (htab);
9977
9978 /* Make room for the .glink code. */
9979 s = htab->glink;
9980 if (s->size == 0)
9981 s->size += GLINK_CALL_STUB_SIZE;
9982 if (htab->opd_abi)
9983 {
9984 /* We need bigger stubs past index 32767. */
9985 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9986 s->size += 4;
9987 s->size += 2*4;
9988 }
9989 else
9990 s->size += 4;
9991
9992 /* We also need to make an entry in the .rela.plt section. */
9993 s = htab->elf.srelplt;
9994 }
9995 s->size += sizeof (Elf64_External_Rela);
9996 doneone = TRUE;
9997 }
9998 else
9999 pent->plt.offset = (bfd_vma) -1;
10000 if (!doneone)
10001 {
10002 h->plt.plist = NULL;
10003 h->needs_plt = 0;
10004 }
10005 }
10006 else
10007 {
10008 h->plt.plist = NULL;
10009 h->needs_plt = 0;
10010 }
10011
10012 return TRUE;
10013}
10014
10015/* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
10016 to set up space for global entry stubs. These are put in glink,
10017 after the branch table. */
10018
10019static bfd_boolean
10020size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
10021{
10022 struct bfd_link_info *info;
10023 struct ppc_link_hash_table *htab;
10024 struct plt_entry *pent;
10025 asection *s;
10026
10027 if (h->root.type == bfd_link_hash_indirect)
10028 return TRUE;
10029
10030 if (!h->pointer_equality_needed)
10031 return TRUE;
10032
10033 if (h->def_regular)
10034 return TRUE;
10035
10036 info = inf;
10037 htab = ppc_hash_table (info);
10038 if (htab == NULL)
10039 return FALSE;
10040
10041 s = htab->glink;
10042 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
10043 if (pent->plt.offset != (bfd_vma) -1
10044 && pent->addend == 0)
10045 {
10046 /* For ELFv2, if this symbol is not defined in a regular file
10047 and we are not generating a shared library or pie, then we
10048 need to define the symbol in the executable on a call stub.
10049 This is to avoid text relocations. */
10050 s->size = (s->size + 15) & -16;
10051 h->root.type = bfd_link_hash_defined;
10052 h->root.u.def.section = s;
10053 h->root.u.def.value = s->size;
10054 s->size += 16;
10055 break;
10056 }
10057 return TRUE;
10058}
10059
10060/* Set DF_TEXTREL if we find any dynamic relocs that apply to
10061 read-only sections. */
10062
10063static bfd_boolean
10064maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10065{
10066 if (h->root.type == bfd_link_hash_indirect)
10067 return TRUE;
10068
10069 if (readonly_dynrelocs (h))
10070 {
10071 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10072
10073 /* Not an error, just cut short the traversal. */
10074 return FALSE;
10075 }
10076 return TRUE;
10077}
10078
10079/* Set the sizes of the dynamic sections. */
10080
10081static bfd_boolean
10082ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10083 struct bfd_link_info *info)
10084{
10085 struct ppc_link_hash_table *htab;
10086 bfd *dynobj;
10087 asection *s;
10088 bfd_boolean relocs;
10089 bfd *ibfd;
10090 struct got_entry *first_tlsld;
10091
10092 htab = ppc_hash_table (info);
10093 if (htab == NULL)
10094 return FALSE;
10095
10096 dynobj = htab->elf.dynobj;
10097 if (dynobj == NULL)
10098 abort ();
10099
10100 if (htab->elf.dynamic_sections_created)
10101 {
10102 /* Set the contents of the .interp section to the interpreter. */
10103 if (bfd_link_executable (info) && !info->nointerp)
10104 {
10105 s = bfd_get_linker_section (dynobj, ".interp");
10106 if (s == NULL)
10107 abort ();
10108 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10109 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10110 }
10111 }
10112
10113 /* Set up .got offsets for local syms, and space for local dynamic
10114 relocs. */
10115 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10116 {
10117 struct got_entry **lgot_ents;
10118 struct got_entry **end_lgot_ents;
10119 struct plt_entry **local_plt;
10120 struct plt_entry **end_local_plt;
10121 unsigned char *lgot_masks;
10122 bfd_size_type locsymcount;
10123 Elf_Internal_Shdr *symtab_hdr;
10124
10125 if (!is_ppc64_elf (ibfd))
10126 continue;
10127
10128 for (s = ibfd->sections; s != NULL; s = s->next)
10129 {
10130 struct ppc_dyn_relocs *p;
10131
10132 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10133 {
10134 if (!bfd_is_abs_section (p->sec)
10135 && bfd_is_abs_section (p->sec->output_section))
10136 {
10137 /* Input section has been discarded, either because
10138 it is a copy of a linkonce section or due to
10139 linker script /DISCARD/, so we'll be discarding
10140 the relocs too. */
10141 }
10142 else if (p->count != 0)
10143 {
10144 asection *srel = elf_section_data (p->sec)->sreloc;
10145 if (p->ifunc)
10146 srel = htab->elf.irelplt;
10147 srel->size += p->count * sizeof (Elf64_External_Rela);
10148 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10149 info->flags |= DF_TEXTREL;
10150 }
10151 }
10152 }
10153
10154 lgot_ents = elf_local_got_ents (ibfd);
10155 if (!lgot_ents)
10156 continue;
10157
10158 symtab_hdr = &elf_symtab_hdr (ibfd);
10159 locsymcount = symtab_hdr->sh_info;
10160 end_lgot_ents = lgot_ents + locsymcount;
10161 local_plt = (struct plt_entry **) end_lgot_ents;
10162 end_local_plt = local_plt + locsymcount;
10163 lgot_masks = (unsigned char *) end_local_plt;
10164 s = ppc64_elf_tdata (ibfd)->got;
10165 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10166 {
10167 struct got_entry **pent, *ent;
10168
10169 pent = lgot_ents;
10170 while ((ent = *pent) != NULL)
10171 if (ent->got.refcount > 0)
10172 {
10173 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10174 {
10175 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10176 *pent = ent->next;
10177 }
10178 else
10179 {
10180 unsigned int ent_size = 8;
10181 unsigned int rel_size = sizeof (Elf64_External_Rela);
10182
10183 ent->got.offset = s->size;
10184 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10185 {
10186 ent_size *= 2;
10187 rel_size *= 2;
10188 }
10189 s->size += ent_size;
10190 if ((*lgot_masks & PLT_IFUNC) != 0)
10191 {
10192 htab->elf.irelplt->size += rel_size;
10193 htab->got_reli_size += rel_size;
10194 }
10195 else if (bfd_link_pic (info))
10196 {
10197 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10198 srel->size += rel_size;
10199 }
10200 pent = &ent->next;
10201 }
10202 }
10203 else
10204 *pent = ent->next;
10205 }
10206
10207 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10208 for (; local_plt < end_local_plt; ++local_plt)
10209 {
10210 struct plt_entry *ent;
10211
10212 for (ent = *local_plt; ent != NULL; ent = ent->next)
10213 if (ent->plt.refcount > 0)
10214 {
10215 s = htab->elf.iplt;
10216 ent->plt.offset = s->size;
10217 s->size += PLT_ENTRY_SIZE (htab);
10218
10219 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10220 }
10221 else
10222 ent->plt.offset = (bfd_vma) -1;
10223 }
10224 }
10225
10226 /* Allocate global sym .plt and .got entries, and space for global
10227 sym dynamic relocs. */
10228 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10229 /* Stash the end of glink branch table. */
10230 if (htab->glink != NULL)
10231 htab->glink->rawsize = htab->glink->size;
10232
10233 if (!htab->opd_abi && !bfd_link_pic (info))
10234 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10235
10236 first_tlsld = NULL;
10237 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10238 {
10239 struct got_entry *ent;
10240
10241 if (!is_ppc64_elf (ibfd))
10242 continue;
10243
10244 ent = ppc64_tlsld_got (ibfd);
10245 if (ent->got.refcount > 0)
10246 {
10247 if (!htab->do_multi_toc && first_tlsld != NULL)
10248 {
10249 ent->is_indirect = TRUE;
10250 ent->got.ent = first_tlsld;
10251 }
10252 else
10253 {
10254 if (first_tlsld == NULL)
10255 first_tlsld = ent;
10256 s = ppc64_elf_tdata (ibfd)->got;
10257 ent->got.offset = s->size;
10258 ent->owner = ibfd;
10259 s->size += 16;
10260 if (bfd_link_pic (info))
10261 {
10262 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10263 srel->size += sizeof (Elf64_External_Rela);
10264 }
10265 }
10266 }
10267 else
10268 ent->got.offset = (bfd_vma) -1;
10269 }
10270
10271 /* We now have determined the sizes of the various dynamic sections.
10272 Allocate memory for them. */
10273 relocs = FALSE;
10274 for (s = dynobj->sections; s != NULL; s = s->next)
10275 {
10276 if ((s->flags & SEC_LINKER_CREATED) == 0)
10277 continue;
10278
10279 if (s == htab->brlt || s == htab->relbrlt)
10280 /* These haven't been allocated yet; don't strip. */
10281 continue;
10282 else if (s == htab->elf.sgot
10283 || s == htab->elf.splt
10284 || s == htab->elf.iplt
10285 || s == htab->glink
10286 || s == htab->elf.sdynbss
10287 || s == htab->elf.sdynrelro)
10288 {
10289 /* Strip this section if we don't need it; see the
10290 comment below. */
10291 }
10292 else if (s == htab->glink_eh_frame)
10293 {
10294 if (!bfd_is_abs_section (s->output_section))
10295 /* Not sized yet. */
10296 continue;
10297 }
10298 else if (CONST_STRNEQ (s->name, ".rela"))
10299 {
10300 if (s->size != 0)
10301 {
10302 if (s != htab->elf.srelplt)
10303 relocs = TRUE;
10304
10305 /* We use the reloc_count field as a counter if we need
10306 to copy relocs into the output file. */
10307 s->reloc_count = 0;
10308 }
10309 }
10310 else
10311 {
10312 /* It's not one of our sections, so don't allocate space. */
10313 continue;
10314 }
10315
10316 if (s->size == 0)
10317 {
10318 /* If we don't need this section, strip it from the
10319 output file. This is mostly to handle .rela.bss and
10320 .rela.plt. We must create both sections in
10321 create_dynamic_sections, because they must be created
10322 before the linker maps input sections to output
10323 sections. The linker does that before
10324 adjust_dynamic_symbol is called, and it is that
10325 function which decides whether anything needs to go
10326 into these sections. */
10327 s->flags |= SEC_EXCLUDE;
10328 continue;
10329 }
10330
10331 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10332 continue;
10333
10334 /* Allocate memory for the section contents. We use bfd_zalloc
10335 here in case unused entries are not reclaimed before the
10336 section's contents are written out. This should not happen,
10337 but this way if it does we get a R_PPC64_NONE reloc in .rela
10338 sections instead of garbage.
10339 We also rely on the section contents being zero when writing
10340 the GOT and .dynrelro. */
10341 s->contents = bfd_zalloc (dynobj, s->size);
10342 if (s->contents == NULL)
10343 return FALSE;
10344 }
10345
10346 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10347 {
10348 if (!is_ppc64_elf (ibfd))
10349 continue;
10350
10351 s = ppc64_elf_tdata (ibfd)->got;
10352 if (s != NULL && s != htab->elf.sgot)
10353 {
10354 if (s->size == 0)
10355 s->flags |= SEC_EXCLUDE;
10356 else
10357 {
10358 s->contents = bfd_zalloc (ibfd, s->size);
10359 if (s->contents == NULL)
10360 return FALSE;
10361 }
10362 }
10363 s = ppc64_elf_tdata (ibfd)->relgot;
10364 if (s != NULL)
10365 {
10366 if (s->size == 0)
10367 s->flags |= SEC_EXCLUDE;
10368 else
10369 {
10370 s->contents = bfd_zalloc (ibfd, s->size);
10371 if (s->contents == NULL)
10372 return FALSE;
10373 relocs = TRUE;
10374 s->reloc_count = 0;
10375 }
10376 }
10377 }
10378
10379 if (htab->elf.dynamic_sections_created)
10380 {
10381 bfd_boolean tls_opt;
10382
10383 /* Add some entries to the .dynamic section. We fill in the
10384 values later, in ppc64_elf_finish_dynamic_sections, but we
10385 must add the entries now so that we get the correct size for
10386 the .dynamic section. The DT_DEBUG entry is filled in by the
10387 dynamic linker and used by the debugger. */
10388#define add_dynamic_entry(TAG, VAL) \
10389 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10390
10391 if (bfd_link_executable (info))
10392 {
10393 if (!add_dynamic_entry (DT_DEBUG, 0))
10394 return FALSE;
10395 }
10396
10397 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10398 {
10399 if (!add_dynamic_entry (DT_PLTGOT, 0)
10400 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10401 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10402 || !add_dynamic_entry (DT_JMPREL, 0)
10403 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10404 return FALSE;
10405 }
10406
10407 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10408 {
10409 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10410 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10411 return FALSE;
10412 }
10413
10414 tls_opt = (htab->params->tls_get_addr_opt
10415 && htab->tls_get_addr_fd != NULL
10416 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10417 if (tls_opt || !htab->opd_abi)
10418 {
10419 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10420 return FALSE;
10421 }
10422
10423 if (relocs)
10424 {
10425 if (!add_dynamic_entry (DT_RELA, 0)
10426 || !add_dynamic_entry (DT_RELASZ, 0)
10427 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10428 return FALSE;
10429
10430 /* If any dynamic relocs apply to a read-only section,
10431 then we need a DT_TEXTREL entry. */
10432 if ((info->flags & DF_TEXTREL) == 0)
10433 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10434
10435 if ((info->flags & DF_TEXTREL) != 0)
10436 {
10437 if (!add_dynamic_entry (DT_TEXTREL, 0))
10438 return FALSE;
10439 }
10440 }
10441 }
10442#undef add_dynamic_entry
10443
10444 return TRUE;
10445}
10446
10447/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10448
10449static bfd_boolean
10450ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10451{
10452 if (h->plt.plist != NULL
10453 && !h->def_regular
10454 && !h->pointer_equality_needed)
10455 return FALSE;
10456
10457 return _bfd_elf_hash_symbol (h);
10458}
10459
10460/* Determine the type of stub needed, if any, for a call. */
10461
10462static inline enum ppc_stub_type
10463ppc_type_of_stub (asection *input_sec,
10464 const Elf_Internal_Rela *rel,
10465 struct ppc_link_hash_entry **hash,
10466 struct plt_entry **plt_ent,
10467 bfd_vma destination,
10468 unsigned long local_off)
10469{
10470 struct ppc_link_hash_entry *h = *hash;
10471 bfd_vma location;
10472 bfd_vma branch_offset;
10473 bfd_vma max_branch_offset;
10474 enum elf_ppc64_reloc_type r_type;
10475
10476 if (h != NULL)
10477 {
10478 struct plt_entry *ent;
10479 struct ppc_link_hash_entry *fdh = h;
10480 if (h->oh != NULL
10481 && h->oh->is_func_descriptor)
10482 {
10483 fdh = ppc_follow_link (h->oh);
10484 *hash = fdh;
10485 }
10486
10487 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10488 if (ent->addend == rel->r_addend
10489 && ent->plt.offset != (bfd_vma) -1)
10490 {
10491 *plt_ent = ent;
10492 return ppc_stub_plt_call;
10493 }
10494
10495 /* Here, we know we don't have a plt entry. If we don't have a
10496 either a defined function descriptor or a defined entry symbol
10497 in a regular object file, then it is pointless trying to make
10498 any other type of stub. */
10499 if (!is_static_defined (&fdh->elf)
10500 && !is_static_defined (&h->elf))
10501 return ppc_stub_none;
10502 }
10503 else if (elf_local_got_ents (input_sec->owner) != NULL)
10504 {
10505 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10506 struct plt_entry **local_plt = (struct plt_entry **)
10507 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10508 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10509
10510 if (local_plt[r_symndx] != NULL)
10511 {
10512 struct plt_entry *ent;
10513
10514 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10515 if (ent->addend == rel->r_addend
10516 && ent->plt.offset != (bfd_vma) -1)
10517 {
10518 *plt_ent = ent;
10519 return ppc_stub_plt_call;
10520 }
10521 }
10522 }
10523
10524 /* Determine where the call point is. */
10525 location = (input_sec->output_offset
10526 + input_sec->output_section->vma
10527 + rel->r_offset);
10528
10529 branch_offset = destination - location;
10530 r_type = ELF64_R_TYPE (rel->r_info);
10531
10532 /* Determine if a long branch stub is needed. */
10533 max_branch_offset = 1 << 25;
10534 if (r_type != R_PPC64_REL24)
10535 max_branch_offset = 1 << 15;
10536
10537 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10538 /* We need a stub. Figure out whether a long_branch or plt_branch
10539 is needed later. */
10540 return ppc_stub_long_branch;
10541
10542 return ppc_stub_none;
10543}
10544
10545/* With power7 weakly ordered memory model, it is possible for ld.so
10546 to update a plt entry in one thread and have another thread see a
10547 stale zero toc entry. To avoid this we need some sort of acquire
10548 barrier in the call stub. One solution is to make the load of the
10549 toc word seem to appear to depend on the load of the function entry
10550 word. Another solution is to test for r2 being zero, and branch to
10551 the appropriate glink entry if so.
10552
10553 . fake dep barrier compare
10554 . ld 12,xxx(2) ld 12,xxx(2)
10555 . mtctr 12 mtctr 12
10556 . xor 11,12,12 ld 2,xxx+8(2)
10557 . add 2,2,11 cmpldi 2,0
10558 . ld 2,xxx+8(2) bnectr+
10559 . bctr b <glink_entry>
10560
10561 The solution involving the compare turns out to be faster, so
10562 that's what we use unless the branch won't reach. */
10563
10564#define ALWAYS_USE_FAKE_DEP 0
10565#define ALWAYS_EMIT_R2SAVE 0
10566
10567#define PPC_LO(v) ((v) & 0xffff)
10568#define PPC_HI(v) (((v) >> 16) & 0xffff)
10569#define PPC_HA(v) PPC_HI ((v) + 0x8000)
10570
10571static inline unsigned int
10572plt_stub_size (struct ppc_link_hash_table *htab,
10573 struct ppc_stub_hash_entry *stub_entry,
10574 bfd_vma off)
10575{
10576 unsigned size = 12;
10577
10578 if (ALWAYS_EMIT_R2SAVE
10579 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10580 size += 4;
10581 if (PPC_HA (off) != 0)
10582 size += 4;
10583 if (htab->opd_abi)
10584 {
10585 size += 4;
10586 if (htab->params->plt_static_chain)
10587 size += 4;
10588 if (htab->params->plt_thread_safe
10589 && htab->elf.dynamic_sections_created
10590 && stub_entry->h != NULL
10591 && stub_entry->h->elf.dynindx != -1)
10592 size += 8;
10593 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10594 size += 4;
10595 }
10596 if (stub_entry->h != NULL
10597 && (stub_entry->h == htab->tls_get_addr_fd
10598 || stub_entry->h == htab->tls_get_addr)
10599 && htab->params->tls_get_addr_opt)
10600 {
10601 size += 7 * 4;
10602 if (ALWAYS_EMIT_R2SAVE
10603 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10604 size += 6 * 4;
10605 }
10606 return size;
10607}
10608
10609/* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10610 then return the padding needed to do so. */
10611static inline unsigned int
10612plt_stub_pad (struct ppc_link_hash_table *htab,
10613 struct ppc_stub_hash_entry *stub_entry,
10614 bfd_vma plt_off)
10615{
10616 int stub_align = 1 << htab->params->plt_stub_align;
10617 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10618 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10619
10620 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10621 > ((stub_size - 1) & -stub_align))
10622 return stub_align - (stub_off & (stub_align - 1));
10623 return 0;
10624}
10625
10626/* Build a .plt call stub. */
10627
10628static inline bfd_byte *
10629build_plt_stub (struct ppc_link_hash_table *htab,
10630 struct ppc_stub_hash_entry *stub_entry,
10631 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10632{
10633 bfd *obfd = htab->params->stub_bfd;
10634 bfd_boolean plt_load_toc = htab->opd_abi;
10635 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10636 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10637 && htab->elf.dynamic_sections_created
10638 && stub_entry->h != NULL
10639 && stub_entry->h->elf.dynindx != -1);
10640 bfd_boolean use_fake_dep = plt_thread_safe;
10641 bfd_vma cmp_branch_off = 0;
10642
10643 if (!ALWAYS_USE_FAKE_DEP
10644 && plt_load_toc
10645 && plt_thread_safe
10646 && !((stub_entry->h == htab->tls_get_addr_fd
10647 || stub_entry->h == htab->tls_get_addr)
10648 && htab->params->tls_get_addr_opt))
10649 {
10650 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10651 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10652 / PLT_ENTRY_SIZE (htab));
10653 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10654 bfd_vma to, from;
10655
10656 if (pltindex > 32768)
10657 glinkoff += (pltindex - 32768) * 4;
10658 to = (glinkoff
10659 + htab->glink->output_offset
10660 + htab->glink->output_section->vma);
10661 from = (p - stub_entry->group->stub_sec->contents
10662 + 4 * (ALWAYS_EMIT_R2SAVE
10663 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10664 + 4 * (PPC_HA (offset) != 0)
10665 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10666 != PPC_HA (offset))
10667 + 4 * (plt_static_chain != 0)
10668 + 20
10669 + stub_entry->group->stub_sec->output_offset
10670 + stub_entry->group->stub_sec->output_section->vma);
10671 cmp_branch_off = to - from;
10672 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10673 }
10674
10675 if (PPC_HA (offset) != 0)
10676 {
10677 if (r != NULL)
10678 {
10679 if (ALWAYS_EMIT_R2SAVE
10680 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10681 r[0].r_offset += 4;
10682 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10683 r[1].r_offset = r[0].r_offset + 4;
10684 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10685 r[1].r_addend = r[0].r_addend;
10686 if (plt_load_toc)
10687 {
10688 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10689 {
10690 r[2].r_offset = r[1].r_offset + 4;
10691 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10692 r[2].r_addend = r[0].r_addend;
10693 }
10694 else
10695 {
10696 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10697 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10698 r[2].r_addend = r[0].r_addend + 8;
10699 if (plt_static_chain)
10700 {
10701 r[3].r_offset = r[2].r_offset + 4;
10702 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10703 r[3].r_addend = r[0].r_addend + 16;
10704 }
10705 }
10706 }
10707 }
10708 if (ALWAYS_EMIT_R2SAVE
10709 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10710 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10711 if (plt_load_toc)
10712 {
10713 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10714 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10715 }
10716 else
10717 {
10718 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10719 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10720 }
10721 if (plt_load_toc
10722 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10723 {
10724 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10725 offset = 0;
10726 }
10727 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10728 if (plt_load_toc)
10729 {
10730 if (use_fake_dep)
10731 {
10732 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10733 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10734 }
10735 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10736 if (plt_static_chain)
10737 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10738 }
10739 }
10740 else
10741 {
10742 if (r != NULL)
10743 {
10744 if (ALWAYS_EMIT_R2SAVE
10745 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10746 r[0].r_offset += 4;
10747 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10748 if (plt_load_toc)
10749 {
10750 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10751 {
10752 r[1].r_offset = r[0].r_offset + 4;
10753 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10754 r[1].r_addend = r[0].r_addend;
10755 }
10756 else
10757 {
10758 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10759 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10760 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10761 if (plt_static_chain)
10762 {
10763 r[2].r_offset = r[1].r_offset + 4;
10764 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10765 r[2].r_addend = r[0].r_addend + 8;
10766 }
10767 }
10768 }
10769 }
10770 if (ALWAYS_EMIT_R2SAVE
10771 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10772 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10773 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10774 if (plt_load_toc
10775 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10776 {
10777 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10778 offset = 0;
10779 }
10780 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10781 if (plt_load_toc)
10782 {
10783 if (use_fake_dep)
10784 {
10785 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10786 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10787 }
10788 if (plt_static_chain)
10789 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10790 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10791 }
10792 }
10793 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10794 {
10795 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10796 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10797 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10798 }
10799 else
10800 bfd_put_32 (obfd, BCTR, p), p += 4;
10801 return p;
10802}
10803
10804/* Build a special .plt call stub for __tls_get_addr. */
10805
10806#define LD_R11_0R3 0xe9630000
10807#define LD_R12_0R3 0xe9830000
10808#define MR_R0_R3 0x7c601b78
10809#define CMPDI_R11_0 0x2c2b0000
10810#define ADD_R3_R12_R13 0x7c6c6a14
10811#define BEQLR 0x4d820020
10812#define MR_R3_R0 0x7c030378
10813#define STD_R11_0R1 0xf9610000
10814#define BCTRL 0x4e800421
10815#define LD_R11_0R1 0xe9610000
10816#define MTLR_R11 0x7d6803a6
10817
10818static inline bfd_byte *
10819build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10820 struct ppc_stub_hash_entry *stub_entry,
10821 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10822{
10823 bfd *obfd = htab->params->stub_bfd;
10824
10825 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10826 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10827 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10828 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10829 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10830 bfd_put_32 (obfd, BEQLR, p), p += 4;
10831 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10832 if (r != NULL)
10833 r[0].r_offset += 7 * 4;
10834 if (!ALWAYS_EMIT_R2SAVE
10835 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10836 return build_plt_stub (htab, stub_entry, p, offset, r);
10837
10838 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10839 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10840
10841 if (r != NULL)
10842 r[0].r_offset += 2 * 4;
10843 p = build_plt_stub (htab, stub_entry, p, offset, r);
10844 bfd_put_32 (obfd, BCTRL, p - 4);
10845
10846 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10847 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10848 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10849 bfd_put_32 (obfd, BLR, p), p += 4;
10850
10851 return p;
10852}
10853
10854static Elf_Internal_Rela *
10855get_relocs (asection *sec, int count)
10856{
10857 Elf_Internal_Rela *relocs;
10858 struct bfd_elf_section_data *elfsec_data;
10859
10860 elfsec_data = elf_section_data (sec);
10861 relocs = elfsec_data->relocs;
10862 if (relocs == NULL)
10863 {
10864 bfd_size_type relsize;
10865 relsize = sec->reloc_count * sizeof (*relocs);
10866 relocs = bfd_alloc (sec->owner, relsize);
10867 if (relocs == NULL)
10868 return NULL;
10869 elfsec_data->relocs = relocs;
10870 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10871 sizeof (Elf_Internal_Shdr));
10872 if (elfsec_data->rela.hdr == NULL)
10873 return NULL;
10874 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10875 * sizeof (Elf64_External_Rela));
10876 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10877 sec->reloc_count = 0;
10878 }
10879 relocs += sec->reloc_count;
10880 sec->reloc_count += count;
10881 return relocs;
10882}
10883
10884static bfd_vma
10885get_r2off (struct bfd_link_info *info,
10886 struct ppc_stub_hash_entry *stub_entry)
10887{
10888 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10889 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10890
10891 if (r2off == 0)
10892 {
10893 /* Support linking -R objects. Get the toc pointer from the
10894 opd entry. */
10895 char buf[8];
10896 if (!htab->opd_abi)
10897 return r2off;
10898 asection *opd = stub_entry->h->elf.root.u.def.section;
10899 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10900
10901 if (strcmp (opd->name, ".opd") != 0
10902 || opd->reloc_count != 0)
10903 {
10904 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10905 stub_entry->h->elf.root.root.string);
10906 bfd_set_error (bfd_error_bad_value);
10907 return (bfd_vma) -1;
10908 }
10909 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10910 return (bfd_vma) -1;
10911 r2off = bfd_get_64 (opd->owner, buf);
10912 r2off -= elf_gp (info->output_bfd);
10913 }
10914 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10915 return r2off;
10916}
10917
10918static bfd_boolean
10919ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10920{
10921 struct ppc_stub_hash_entry *stub_entry;
10922 struct ppc_branch_hash_entry *br_entry;
10923 struct bfd_link_info *info;
10924 struct ppc_link_hash_table *htab;
10925 bfd_byte *loc;
10926 bfd_byte *p;
10927 bfd_vma dest, off;
10928 int size;
10929 Elf_Internal_Rela *r;
10930 asection *plt;
10931
10932 /* Massage our args to the form they really have. */
10933 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10934 info = in_arg;
10935
10936 htab = ppc_hash_table (info);
10937 if (htab == NULL)
10938 return FALSE;
10939
10940 /* Make a note of the offset within the stubs for this entry. */
10941 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10942 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10943
10944 htab->stub_count[stub_entry->stub_type - 1] += 1;
10945 switch (stub_entry->stub_type)
10946 {
10947 case ppc_stub_long_branch:
10948 case ppc_stub_long_branch_r2off:
10949 /* Branches are relative. This is where we are going to. */
10950 dest = (stub_entry->target_value
10951 + stub_entry->target_section->output_offset
10952 + stub_entry->target_section->output_section->vma);
10953 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10954 off = dest;
10955
10956 /* And this is where we are coming from. */
10957 off -= (stub_entry->stub_offset
10958 + stub_entry->group->stub_sec->output_offset
10959 + stub_entry->group->stub_sec->output_section->vma);
10960
10961 size = 4;
10962 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10963 {
10964 bfd_vma r2off = get_r2off (info, stub_entry);
10965
10966 if (r2off == (bfd_vma) -1)
10967 {
10968 htab->stub_error = TRUE;
10969 return FALSE;
10970 }
10971 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10972 loc += 4;
10973 size = 8;
10974 if (PPC_HA (r2off) != 0)
10975 {
10976 bfd_put_32 (htab->params->stub_bfd,
10977 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10978 loc += 4;
10979 size += 4;
10980 }
10981 if (PPC_LO (r2off) != 0)
10982 {
10983 bfd_put_32 (htab->params->stub_bfd,
10984 ADDI_R2_R2 | PPC_LO (r2off), loc);
10985 loc += 4;
10986 size += 4;
10987 }
10988 off -= size - 4;
10989 }
10990 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10991
10992 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10993 {
10994 info->callbacks->einfo
10995 (_("%P: long branch stub `%s' offset overflow\n"),
10996 stub_entry->root.string);
10997 htab->stub_error = TRUE;
10998 return FALSE;
10999 }
11000
11001 if (info->emitrelocations)
11002 {
11003 r = get_relocs (stub_entry->group->stub_sec, 1);
11004 if (r == NULL)
11005 return FALSE;
11006 r->r_offset = loc - stub_entry->group->stub_sec->contents;
11007 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
11008 r->r_addend = dest;
11009 if (stub_entry->h != NULL)
11010 {
11011 struct elf_link_hash_entry **hashes;
11012 unsigned long symndx;
11013 struct ppc_link_hash_entry *h;
11014
11015 hashes = elf_sym_hashes (htab->params->stub_bfd);
11016 if (hashes == NULL)
11017 {
11018 bfd_size_type hsize;
11019
11020 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
11021 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
11022 if (hashes == NULL)
11023 return FALSE;
11024 elf_sym_hashes (htab->params->stub_bfd) = hashes;
11025 htab->stub_globals = 1;
11026 }
11027 symndx = htab->stub_globals++;
11028 h = stub_entry->h;
11029 hashes[symndx] = &h->elf;
11030 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
11031 if (h->oh != NULL && h->oh->is_func)
11032 h = ppc_follow_link (h->oh);
11033 if (h->elf.root.u.def.section != stub_entry->target_section)
11034 /* H is an opd symbol. The addend must be zero. */
11035 r->r_addend = 0;
11036 else
11037 {
11038 off = (h->elf.root.u.def.value
11039 + h->elf.root.u.def.section->output_offset
11040 + h->elf.root.u.def.section->output_section->vma);
11041 r->r_addend -= off;
11042 }
11043 }
11044 }
11045 break;
11046
11047 case ppc_stub_plt_branch:
11048 case ppc_stub_plt_branch_r2off:
11049 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11050 stub_entry->root.string + 9,
11051 FALSE, FALSE);
11052 if (br_entry == NULL)
11053 {
11054 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
11055 stub_entry->root.string);
11056 htab->stub_error = TRUE;
11057 return FALSE;
11058 }
11059
11060 dest = (stub_entry->target_value
11061 + stub_entry->target_section->output_offset
11062 + stub_entry->target_section->output_section->vma);
11063 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11064 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11065
11066 bfd_put_64 (htab->brlt->owner, dest,
11067 htab->brlt->contents + br_entry->offset);
11068
11069 if (br_entry->iter == htab->stub_iteration)
11070 {
11071 br_entry->iter = 0;
11072
11073 if (htab->relbrlt != NULL)
11074 {
11075 /* Create a reloc for the branch lookup table entry. */
11076 Elf_Internal_Rela rela;
11077 bfd_byte *rl;
11078
11079 rela.r_offset = (br_entry->offset
11080 + htab->brlt->output_offset
11081 + htab->brlt->output_section->vma);
11082 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11083 rela.r_addend = dest;
11084
11085 rl = htab->relbrlt->contents;
11086 rl += (htab->relbrlt->reloc_count++
11087 * sizeof (Elf64_External_Rela));
11088 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11089 }
11090 else if (info->emitrelocations)
11091 {
11092 r = get_relocs (htab->brlt, 1);
11093 if (r == NULL)
11094 return FALSE;
11095 /* brlt, being SEC_LINKER_CREATED does not go through the
11096 normal reloc processing. Symbols and offsets are not
11097 translated from input file to output file form, so
11098 set up the offset per the output file. */
11099 r->r_offset = (br_entry->offset
11100 + htab->brlt->output_offset
11101 + htab->brlt->output_section->vma);
11102 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11103 r->r_addend = dest;
11104 }
11105 }
11106
11107 dest = (br_entry->offset
11108 + htab->brlt->output_offset
11109 + htab->brlt->output_section->vma);
11110
11111 off = (dest
11112 - elf_gp (htab->brlt->output_section->owner)
11113 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11114
11115 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11116 {
11117 info->callbacks->einfo
11118 (_("%P: linkage table error against `%T'\n"),
11119 stub_entry->root.string);
11120 bfd_set_error (bfd_error_bad_value);
11121 htab->stub_error = TRUE;
11122 return FALSE;
11123 }
11124
11125 if (info->emitrelocations)
11126 {
11127 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11128 if (r == NULL)
11129 return FALSE;
11130 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11131 if (bfd_big_endian (info->output_bfd))
11132 r[0].r_offset += 2;
11133 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11134 r[0].r_offset += 4;
11135 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11136 r[0].r_addend = dest;
11137 if (PPC_HA (off) != 0)
11138 {
11139 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11140 r[1].r_offset = r[0].r_offset + 4;
11141 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11142 r[1].r_addend = r[0].r_addend;
11143 }
11144 }
11145
11146 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11147 {
11148 if (PPC_HA (off) != 0)
11149 {
11150 size = 16;
11151 bfd_put_32 (htab->params->stub_bfd,
11152 ADDIS_R12_R2 | PPC_HA (off), loc);
11153 loc += 4;
11154 bfd_put_32 (htab->params->stub_bfd,
11155 LD_R12_0R12 | PPC_LO (off), loc);
11156 }
11157 else
11158 {
11159 size = 12;
11160 bfd_put_32 (htab->params->stub_bfd,
11161 LD_R12_0R2 | PPC_LO (off), loc);
11162 }
11163 }
11164 else
11165 {
11166 bfd_vma r2off = get_r2off (info, stub_entry);
11167
11168 if (r2off == (bfd_vma) -1)
11169 {
11170 htab->stub_error = TRUE;
11171 return FALSE;
11172 }
11173
11174 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11175 loc += 4;
11176 size = 16;
11177 if (PPC_HA (off) != 0)
11178 {
11179 size += 4;
11180 bfd_put_32 (htab->params->stub_bfd,
11181 ADDIS_R12_R2 | PPC_HA (off), loc);
11182 loc += 4;
11183 bfd_put_32 (htab->params->stub_bfd,
11184 LD_R12_0R12 | PPC_LO (off), loc);
11185 }
11186 else
11187 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11188
11189 if (PPC_HA (r2off) != 0)
11190 {
11191 size += 4;
11192 loc += 4;
11193 bfd_put_32 (htab->params->stub_bfd,
11194 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11195 }
11196 if (PPC_LO (r2off) != 0)
11197 {
11198 size += 4;
11199 loc += 4;
11200 bfd_put_32 (htab->params->stub_bfd,
11201 ADDI_R2_R2 | PPC_LO (r2off), loc);
11202 }
11203 }
11204 loc += 4;
11205 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11206 loc += 4;
11207 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11208 break;
11209
11210 case ppc_stub_plt_call:
11211 case ppc_stub_plt_call_r2save:
11212 if (stub_entry->h != NULL
11213 && stub_entry->h->is_func_descriptor
11214 && stub_entry->h->oh != NULL)
11215 {
11216 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11217
11218 /* If the old-ABI "dot-symbol" is undefined make it weak so
11219 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11220 if (fh->elf.root.type == bfd_link_hash_undefined
11221 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11222 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11223 fh->elf.root.type = bfd_link_hash_undefweak;
11224 }
11225
11226 /* Now build the stub. */
11227 dest = stub_entry->plt_ent->plt.offset & ~1;
11228 if (dest >= (bfd_vma) -2)
11229 abort ();
11230
11231 plt = htab->elf.splt;
11232 if (!htab->elf.dynamic_sections_created
11233 || stub_entry->h == NULL
11234 || stub_entry->h->elf.dynindx == -1)
11235 plt = htab->elf.iplt;
11236
11237 dest += plt->output_offset + plt->output_section->vma;
11238
11239 if (stub_entry->h == NULL
11240 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11241 {
11242 Elf_Internal_Rela rela;
11243 bfd_byte *rl;
11244
11245 rela.r_offset = dest;
11246 if (htab->opd_abi)
11247 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11248 else
11249 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11250 rela.r_addend = (stub_entry->target_value
11251 + stub_entry->target_section->output_offset
11252 + stub_entry->target_section->output_section->vma);
11253
11254 rl = (htab->elf.irelplt->contents
11255 + (htab->elf.irelplt->reloc_count++
11256 * sizeof (Elf64_External_Rela)));
11257 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11258 stub_entry->plt_ent->plt.offset |= 1;
11259 htab->local_ifunc_resolver = 1;
11260 }
11261
11262 off = (dest
11263 - elf_gp (plt->output_section->owner)
11264 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11265
11266 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11267 {
11268 info->callbacks->einfo
11269 /* xgettext:c-format */
11270 (_("%P: linkage table error against `%T'\n"),
11271 stub_entry->h != NULL
11272 ? stub_entry->h->elf.root.root.string
11273 : "<local sym>");
11274 bfd_set_error (bfd_error_bad_value);
11275 htab->stub_error = TRUE;
11276 return FALSE;
11277 }
11278
11279 if (htab->params->plt_stub_align != 0)
11280 {
11281 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11282
11283 stub_entry->group->stub_sec->size += pad;
11284 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11285 loc += pad;
11286 }
11287
11288 r = NULL;
11289 if (info->emitrelocations)
11290 {
11291 r = get_relocs (stub_entry->group->stub_sec,
11292 ((PPC_HA (off) != 0)
11293 + (htab->opd_abi
11294 ? 2 + (htab->params->plt_static_chain
11295 && PPC_HA (off + 16) == PPC_HA (off))
11296 : 1)));
11297 if (r == NULL)
11298 return FALSE;
11299 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11300 if (bfd_big_endian (info->output_bfd))
11301 r[0].r_offset += 2;
11302 r[0].r_addend = dest;
11303 }
11304 if (stub_entry->h != NULL
11305 && (stub_entry->h == htab->tls_get_addr_fd
11306 || stub_entry->h == htab->tls_get_addr)
11307 && htab->params->tls_get_addr_opt)
11308 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11309 else
11310 p = build_plt_stub (htab, stub_entry, loc, off, r);
11311 size = p - loc;
11312 break;
11313
11314 case ppc_stub_save_res:
11315 return TRUE;
11316
11317 default:
11318 BFD_FAIL ();
11319 return FALSE;
11320 }
11321
11322 stub_entry->group->stub_sec->size += size;
11323
11324 if (htab->params->emit_stub_syms)
11325 {
11326 struct elf_link_hash_entry *h;
11327 size_t len1, len2;
11328 char *name;
11329 const char *const stub_str[] = { "long_branch",
11330 "long_branch_r2off",
11331 "plt_branch",
11332 "plt_branch_r2off",
11333 "plt_call",
11334 "plt_call" };
11335
11336 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11337 len2 = strlen (stub_entry->root.string);
11338 name = bfd_malloc (len1 + len2 + 2);
11339 if (name == NULL)
11340 return FALSE;
11341 memcpy (name, stub_entry->root.string, 9);
11342 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11343 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11344 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11345 if (h == NULL)
11346 return FALSE;
11347 if (h->root.type == bfd_link_hash_new)
11348 {
11349 h->root.type = bfd_link_hash_defined;
11350 h->root.u.def.section = stub_entry->group->stub_sec;
11351 h->root.u.def.value = stub_entry->stub_offset;
11352 h->ref_regular = 1;
11353 h->def_regular = 1;
11354 h->ref_regular_nonweak = 1;
11355 h->forced_local = 1;
11356 h->non_elf = 0;
11357 h->root.linker_def = 1;
11358 }
11359 }
11360
11361 return TRUE;
11362}
11363
11364/* As above, but don't actually build the stub. Just bump offset so
11365 we know stub section sizes, and select plt_branch stubs where
11366 long_branch stubs won't do. */
11367
11368static bfd_boolean
11369ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11370{
11371 struct ppc_stub_hash_entry *stub_entry;
11372 struct bfd_link_info *info;
11373 struct ppc_link_hash_table *htab;
11374 bfd_vma off;
11375 int size;
11376
11377 /* Massage our args to the form they really have. */
11378 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11379 info = in_arg;
11380
11381 htab = ppc_hash_table (info);
11382 if (htab == NULL)
11383 return FALSE;
11384
11385 if (stub_entry->h != NULL
11386 && stub_entry->h->save_res
11387 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11388 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11389 {
11390 /* Don't make stubs to out-of-line register save/restore
11391 functions. Instead, emit copies of the functions. */
11392 stub_entry->group->needs_save_res = 1;
11393 stub_entry->stub_type = ppc_stub_save_res;
11394 return TRUE;
11395 }
11396
11397 if (stub_entry->stub_type == ppc_stub_plt_call
11398 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11399 {
11400 asection *plt;
11401 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11402 if (off >= (bfd_vma) -2)
11403 abort ();
11404 plt = htab->elf.splt;
11405 if (!htab->elf.dynamic_sections_created
11406 || stub_entry->h == NULL
11407 || stub_entry->h->elf.dynindx == -1)
11408 plt = htab->elf.iplt;
11409 off += (plt->output_offset
11410 + plt->output_section->vma
11411 - elf_gp (plt->output_section->owner)
11412 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11413
11414 size = plt_stub_size (htab, stub_entry, off);
11415 if (stub_entry->h != NULL
11416 && (stub_entry->h == htab->tls_get_addr_fd
11417 || stub_entry->h == htab->tls_get_addr)
11418 && htab->params->tls_get_addr_opt
11419 && (ALWAYS_EMIT_R2SAVE
11420 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11421 stub_entry->group->tls_get_addr_opt_bctrl
11422 = stub_entry->group->stub_sec->size + size - 5 * 4;
11423
11424 if (htab->params->plt_stub_align)
11425 size += plt_stub_pad (htab, stub_entry, off);
11426 if (info->emitrelocations)
11427 {
11428 stub_entry->group->stub_sec->reloc_count
11429 += ((PPC_HA (off) != 0)
11430 + (htab->opd_abi
11431 ? 2 + (htab->params->plt_static_chain
11432 && PPC_HA (off + 16) == PPC_HA (off))
11433 : 1));
11434 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11435 }
11436 }
11437 else
11438 {
11439 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11440 variants. */
11441 bfd_vma r2off = 0;
11442 bfd_vma local_off = 0;
11443
11444 off = (stub_entry->target_value
11445 + stub_entry->target_section->output_offset
11446 + stub_entry->target_section->output_section->vma);
11447 off -= (stub_entry->group->stub_sec->size
11448 + stub_entry->group->stub_sec->output_offset
11449 + stub_entry->group->stub_sec->output_section->vma);
11450
11451 /* Reset the stub type from the plt variant in case we now
11452 can reach with a shorter stub. */
11453 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11454 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11455
11456 size = 4;
11457 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11458 {
11459 r2off = get_r2off (info, stub_entry);
11460 if (r2off == (bfd_vma) -1)
11461 {
11462 htab->stub_error = TRUE;
11463 return FALSE;
11464 }
11465 size = 8;
11466 if (PPC_HA (r2off) != 0)
11467 size += 4;
11468 if (PPC_LO (r2off) != 0)
11469 size += 4;
11470 off -= size - 4;
11471 }
11472
11473 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11474
11475 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11476 Do the same for -R objects without function descriptors. */
11477 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11478 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11479 && r2off == 0
11480 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11481 {
11482 struct ppc_branch_hash_entry *br_entry;
11483
11484 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11485 stub_entry->root.string + 9,
11486 TRUE, FALSE);
11487 if (br_entry == NULL)
11488 {
11489 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11490 stub_entry->root.string);
11491 htab->stub_error = TRUE;
11492 return FALSE;
11493 }
11494
11495 if (br_entry->iter != htab->stub_iteration)
11496 {
11497 br_entry->iter = htab->stub_iteration;
11498 br_entry->offset = htab->brlt->size;
11499 htab->brlt->size += 8;
11500
11501 if (htab->relbrlt != NULL)
11502 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11503 else if (info->emitrelocations)
11504 {
11505 htab->brlt->reloc_count += 1;
11506 htab->brlt->flags |= SEC_RELOC;
11507 }
11508 }
11509
11510 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11511 off = (br_entry->offset
11512 + htab->brlt->output_offset
11513 + htab->brlt->output_section->vma
11514 - elf_gp (htab->brlt->output_section->owner)
11515 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11516
11517 if (info->emitrelocations)
11518 {
11519 stub_entry->group->stub_sec->reloc_count
11520 += 1 + (PPC_HA (off) != 0);
11521 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11522 }
11523
11524 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11525 {
11526 size = 12;
11527 if (PPC_HA (off) != 0)
11528 size = 16;
11529 }
11530 else
11531 {
11532 size = 16;
11533 if (PPC_HA (off) != 0)
11534 size += 4;
11535
11536 if (PPC_HA (r2off) != 0)
11537 size += 4;
11538 if (PPC_LO (r2off) != 0)
11539 size += 4;
11540 }
11541 }
11542 else if (info->emitrelocations)
11543 {
11544 stub_entry->group->stub_sec->reloc_count += 1;
11545 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11546 }
11547 }
11548
11549 stub_entry->group->stub_sec->size += size;
11550 return TRUE;
11551}
11552
11553/* Set up various things so that we can make a list of input sections
11554 for each output section included in the link. Returns -1 on error,
11555 0 when no stubs will be needed, and 1 on success. */
11556
11557int
11558ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11559{
11560 unsigned int id;
11561 bfd_size_type amt;
11562 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11563
11564 if (htab == NULL)
11565 return -1;
11566
11567 htab->sec_info_arr_size = bfd_get_next_section_id ();
11568 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11569 htab->sec_info = bfd_zmalloc (amt);
11570 if (htab->sec_info == NULL)
11571 return -1;
11572
11573 /* Set toc_off for com, und, abs and ind sections. */
11574 for (id = 0; id < 3; id++)
11575 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11576
11577 return 1;
11578}
11579
11580/* Set up for first pass at multitoc partitioning. */
11581
11582void
11583ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11584{
11585 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11586
11587 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11588 htab->toc_bfd = NULL;
11589 htab->toc_first_sec = NULL;
11590}
11591
11592/* The linker repeatedly calls this function for each TOC input section
11593 and linker generated GOT section. Group input bfds such that the toc
11594 within a group is less than 64k in size. */
11595
11596bfd_boolean
11597ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11598{
11599 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11600 bfd_vma addr, off, limit;
11601
11602 if (htab == NULL)
11603 return FALSE;
11604
11605 if (!htab->second_toc_pass)
11606 {
11607 /* Keep track of the first .toc or .got section for this input bfd. */
11608 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11609
11610 if (new_bfd)
11611 {
11612 htab->toc_bfd = isec->owner;
11613 htab->toc_first_sec = isec;
11614 }
11615
11616 addr = isec->output_offset + isec->output_section->vma;
11617 off = addr - htab->toc_curr;
11618 limit = 0x80008000;
11619 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11620 limit = 0x10000;
11621 if (off + isec->size > limit)
11622 {
11623 addr = (htab->toc_first_sec->output_offset
11624 + htab->toc_first_sec->output_section->vma);
11625 htab->toc_curr = addr;
11626 htab->toc_curr &= -TOC_BASE_ALIGN;
11627 }
11628
11629 /* toc_curr is the base address of this toc group. Set elf_gp
11630 for the input section to be the offset relative to the
11631 output toc base plus 0x8000. Making the input elf_gp an
11632 offset allows us to move the toc as a whole without
11633 recalculating input elf_gp. */
11634 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11635 off += TOC_BASE_OFF;
11636
11637 /* Die if someone uses a linker script that doesn't keep input
11638 file .toc and .got together. */
11639 if (new_bfd
11640 && elf_gp (isec->owner) != 0
11641 && elf_gp (isec->owner) != off)
11642 return FALSE;
11643
11644 elf_gp (isec->owner) = off;
11645 return TRUE;
11646 }
11647
11648 /* During the second pass toc_first_sec points to the start of
11649 a toc group, and toc_curr is used to track the old elf_gp.
11650 We use toc_bfd to ensure we only look at each bfd once. */
11651 if (htab->toc_bfd == isec->owner)
11652 return TRUE;
11653 htab->toc_bfd = isec->owner;
11654
11655 if (htab->toc_first_sec == NULL
11656 || htab->toc_curr != elf_gp (isec->owner))
11657 {
11658 htab->toc_curr = elf_gp (isec->owner);
11659 htab->toc_first_sec = isec;
11660 }
11661 addr = (htab->toc_first_sec->output_offset
11662 + htab->toc_first_sec->output_section->vma);
11663 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11664 elf_gp (isec->owner) = off;
11665
11666 return TRUE;
11667}
11668
11669/* Called via elf_link_hash_traverse to merge GOT entries for global
11670 symbol H. */
11671
11672static bfd_boolean
11673merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11674{
11675 if (h->root.type == bfd_link_hash_indirect)
11676 return TRUE;
11677
11678 merge_got_entries (&h->got.glist);
11679
11680 return TRUE;
11681}
11682
11683/* Called via elf_link_hash_traverse to allocate GOT entries for global
11684 symbol H. */
11685
11686static bfd_boolean
11687reallocate_got (struct elf_link_hash_entry *h, void *inf)
11688{
11689 struct got_entry *gent;
11690
11691 if (h->root.type == bfd_link_hash_indirect)
11692 return TRUE;
11693
11694 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11695 if (!gent->is_indirect)
11696 allocate_got (h, (struct bfd_link_info *) inf, gent);
11697 return TRUE;
11698}
11699
11700/* Called on the first multitoc pass after the last call to
11701 ppc64_elf_next_toc_section. This function removes duplicate GOT
11702 entries. */
11703
11704bfd_boolean
11705ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11706{
11707 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11708 struct bfd *ibfd, *ibfd2;
11709 bfd_boolean done_something;
11710
11711 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11712
11713 if (!htab->do_multi_toc)
11714 return FALSE;
11715
11716 /* Merge global sym got entries within a toc group. */
11717 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11718
11719 /* And tlsld_got. */
11720 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11721 {
11722 struct got_entry *ent, *ent2;
11723
11724 if (!is_ppc64_elf (ibfd))
11725 continue;
11726
11727 ent = ppc64_tlsld_got (ibfd);
11728 if (!ent->is_indirect
11729 && ent->got.offset != (bfd_vma) -1)
11730 {
11731 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11732 {
11733 if (!is_ppc64_elf (ibfd2))
11734 continue;
11735
11736 ent2 = ppc64_tlsld_got (ibfd2);
11737 if (!ent2->is_indirect
11738 && ent2->got.offset != (bfd_vma) -1
11739 && elf_gp (ibfd2) == elf_gp (ibfd))
11740 {
11741 ent2->is_indirect = TRUE;
11742 ent2->got.ent = ent;
11743 }
11744 }
11745 }
11746 }
11747
11748 /* Zap sizes of got sections. */
11749 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11750 htab->elf.irelplt->size -= htab->got_reli_size;
11751 htab->got_reli_size = 0;
11752
11753 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11754 {
11755 asection *got, *relgot;
11756
11757 if (!is_ppc64_elf (ibfd))
11758 continue;
11759
11760 got = ppc64_elf_tdata (ibfd)->got;
11761 if (got != NULL)
11762 {
11763 got->rawsize = got->size;
11764 got->size = 0;
11765 relgot = ppc64_elf_tdata (ibfd)->relgot;
11766 relgot->rawsize = relgot->size;
11767 relgot->size = 0;
11768 }
11769 }
11770
11771 /* Now reallocate the got, local syms first. We don't need to
11772 allocate section contents again since we never increase size. */
11773 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11774 {
11775 struct got_entry **lgot_ents;
11776 struct got_entry **end_lgot_ents;
11777 struct plt_entry **local_plt;
11778 struct plt_entry **end_local_plt;
11779 unsigned char *lgot_masks;
11780 bfd_size_type locsymcount;
11781 Elf_Internal_Shdr *symtab_hdr;
11782 asection *s;
11783
11784 if (!is_ppc64_elf (ibfd))
11785 continue;
11786
11787 lgot_ents = elf_local_got_ents (ibfd);
11788 if (!lgot_ents)
11789 continue;
11790
11791 symtab_hdr = &elf_symtab_hdr (ibfd);
11792 locsymcount = symtab_hdr->sh_info;
11793 end_lgot_ents = lgot_ents + locsymcount;
11794 local_plt = (struct plt_entry **) end_lgot_ents;
11795 end_local_plt = local_plt + locsymcount;
11796 lgot_masks = (unsigned char *) end_local_plt;
11797 s = ppc64_elf_tdata (ibfd)->got;
11798 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11799 {
11800 struct got_entry *ent;
11801
11802 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11803 {
11804 unsigned int ent_size = 8;
11805 unsigned int rel_size = sizeof (Elf64_External_Rela);
11806
11807 ent->got.offset = s->size;
11808 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11809 {
11810 ent_size *= 2;
11811 rel_size *= 2;
11812 }
11813 s->size += ent_size;
11814 if ((*lgot_masks & PLT_IFUNC) != 0)
11815 {
11816 htab->elf.irelplt->size += rel_size;
11817 htab->got_reli_size += rel_size;
11818 }
11819 else if (bfd_link_pic (info))
11820 {
11821 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11822 srel->size += rel_size;
11823 }
11824 }
11825 }
11826 }
11827
11828 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11829
11830 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11831 {
11832 struct got_entry *ent;
11833
11834 if (!is_ppc64_elf (ibfd))
11835 continue;
11836
11837 ent = ppc64_tlsld_got (ibfd);
11838 if (!ent->is_indirect
11839 && ent->got.offset != (bfd_vma) -1)
11840 {
11841 asection *s = ppc64_elf_tdata (ibfd)->got;
11842 ent->got.offset = s->size;
11843 s->size += 16;
11844 if (bfd_link_pic (info))
11845 {
11846 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11847 srel->size += sizeof (Elf64_External_Rela);
11848 }
11849 }
11850 }
11851
11852 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11853 if (!done_something)
11854 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11855 {
11856 asection *got;
11857
11858 if (!is_ppc64_elf (ibfd))
11859 continue;
11860
11861 got = ppc64_elf_tdata (ibfd)->got;
11862 if (got != NULL)
11863 {
11864 done_something = got->rawsize != got->size;
11865 if (done_something)
11866 break;
11867 }
11868 }
11869
11870 if (done_something)
11871 (*htab->params->layout_sections_again) ();
11872
11873 /* Set up for second pass over toc sections to recalculate elf_gp
11874 on input sections. */
11875 htab->toc_bfd = NULL;
11876 htab->toc_first_sec = NULL;
11877 htab->second_toc_pass = TRUE;
11878 return done_something;
11879}
11880
11881/* Called after second pass of multitoc partitioning. */
11882
11883void
11884ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11885{
11886 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11887
11888 /* After the second pass, toc_curr tracks the TOC offset used
11889 for code sections below in ppc64_elf_next_input_section. */
11890 htab->toc_curr = TOC_BASE_OFF;
11891}
11892
11893/* No toc references were found in ISEC. If the code in ISEC makes no
11894 calls, then there's no need to use toc adjusting stubs when branching
11895 into ISEC. Actually, indirect calls from ISEC are OK as they will
11896 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11897 needed, and 2 if a cyclical call-graph was found but no other reason
11898 for a stub was detected. If called from the top level, a return of
11899 2 means the same as a return of 0. */
11900
11901static int
11902toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11903{
11904 int ret;
11905
11906 /* Mark this section as checked. */
11907 isec->call_check_done = 1;
11908
11909 /* We know none of our code bearing sections will need toc stubs. */
11910 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11911 return 0;
11912
11913 if (isec->size == 0)
11914 return 0;
11915
11916 if (isec->output_section == NULL)
11917 return 0;
11918
11919 ret = 0;
11920 if (isec->reloc_count != 0)
11921 {
11922 Elf_Internal_Rela *relstart, *rel;
11923 Elf_Internal_Sym *local_syms;
11924 struct ppc_link_hash_table *htab;
11925
11926 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11927 info->keep_memory);
11928 if (relstart == NULL)
11929 return -1;
11930
11931 /* Look for branches to outside of this section. */
11932 local_syms = NULL;
11933 htab = ppc_hash_table (info);
11934 if (htab == NULL)
11935 return -1;
11936
11937 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11938 {
11939 enum elf_ppc64_reloc_type r_type;
11940 unsigned long r_symndx;
11941 struct elf_link_hash_entry *h;
11942 struct ppc_link_hash_entry *eh;
11943 Elf_Internal_Sym *sym;
11944 asection *sym_sec;
11945 struct _opd_sec_data *opd;
11946 bfd_vma sym_value;
11947 bfd_vma dest;
11948
11949 r_type = ELF64_R_TYPE (rel->r_info);
11950 if (r_type != R_PPC64_REL24
11951 && r_type != R_PPC64_REL14
11952 && r_type != R_PPC64_REL14_BRTAKEN
11953 && r_type != R_PPC64_REL14_BRNTAKEN)
11954 continue;
11955
11956 r_symndx = ELF64_R_SYM (rel->r_info);
11957 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11958 isec->owner))
11959 {
11960 ret = -1;
11961 break;
11962 }
11963
11964 /* Calls to dynamic lib functions go through a plt call stub
11965 that uses r2. */
11966 eh = (struct ppc_link_hash_entry *) h;
11967 if (eh != NULL
11968 && (eh->elf.plt.plist != NULL
11969 || (eh->oh != NULL
11970 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11971 {
11972 ret = 1;
11973 break;
11974 }
11975
11976 if (sym_sec == NULL)
11977 /* Ignore other undefined symbols. */
11978 continue;
11979
11980 /* Assume branches to other sections not included in the
11981 link need stubs too, to cover -R and absolute syms. */
11982 if (sym_sec->output_section == NULL)
11983 {
11984 ret = 1;
11985 break;
11986 }
11987
11988 if (h == NULL)
11989 sym_value = sym->st_value;
11990 else
11991 {
11992 if (h->root.type != bfd_link_hash_defined
11993 && h->root.type != bfd_link_hash_defweak)
11994 abort ();
11995 sym_value = h->root.u.def.value;
11996 }
11997 sym_value += rel->r_addend;
11998
11999 /* If this branch reloc uses an opd sym, find the code section. */
12000 opd = get_opd_info (sym_sec);
12001 if (opd != NULL)
12002 {
12003 if (h == NULL && opd->adjust != NULL)
12004 {
12005 long adjust;
12006
12007 adjust = opd->adjust[OPD_NDX (sym_value)];
12008 if (adjust == -1)
12009 /* Assume deleted functions won't ever be called. */
12010 continue;
12011 sym_value += adjust;
12012 }
12013
12014 dest = opd_entry_value (sym_sec, sym_value,
12015 &sym_sec, NULL, FALSE);
12016 if (dest == (bfd_vma) -1)
12017 continue;
12018 }
12019 else
12020 dest = (sym_value
12021 + sym_sec->output_offset
12022 + sym_sec->output_section->vma);
12023
12024 /* Ignore branch to self. */
12025 if (sym_sec == isec)
12026 continue;
12027
12028 /* If the called function uses the toc, we need a stub. */
12029 if (sym_sec->has_toc_reloc
12030 || sym_sec->makes_toc_func_call)
12031 {
12032 ret = 1;
12033 break;
12034 }
12035
12036 /* Assume any branch that needs a long branch stub might in fact
12037 need a plt_branch stub. A plt_branch stub uses r2. */
12038 else if (dest - (isec->output_offset
12039 + isec->output_section->vma
12040 + rel->r_offset) + (1 << 25)
12041 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
12042 ? h->other
12043 : sym->st_other))
12044 {
12045 ret = 1;
12046 break;
12047 }
12048
12049 /* If calling back to a section in the process of being
12050 tested, we can't say for sure that no toc adjusting stubs
12051 are needed, so don't return zero. */
12052 else if (sym_sec->call_check_in_progress)
12053 ret = 2;
12054
12055 /* Branches to another section that itself doesn't have any TOC
12056 references are OK. Recursively call ourselves to check. */
12057 else if (!sym_sec->call_check_done)
12058 {
12059 int recur;
12060
12061 /* Mark current section as indeterminate, so that other
12062 sections that call back to current won't be marked as
12063 known. */
12064 isec->call_check_in_progress = 1;
12065 recur = toc_adjusting_stub_needed (info, sym_sec);
12066 isec->call_check_in_progress = 0;
12067
12068 if (recur != 0)
12069 {
12070 ret = recur;
12071 if (recur != 2)
12072 break;
12073 }
12074 }
12075 }
12076
12077 if (local_syms != NULL
12078 && (elf_symtab_hdr (isec->owner).contents
12079 != (unsigned char *) local_syms))
12080 free (local_syms);
12081 if (elf_section_data (isec)->relocs != relstart)
12082 free (relstart);
12083 }
12084
12085 if ((ret & 1) == 0
12086 && isec->map_head.s != NULL
12087 && (strcmp (isec->output_section->name, ".init") == 0
12088 || strcmp (isec->output_section->name, ".fini") == 0))
12089 {
12090 if (isec->map_head.s->has_toc_reloc
12091 || isec->map_head.s->makes_toc_func_call)
12092 ret = 1;
12093 else if (!isec->map_head.s->call_check_done)
12094 {
12095 int recur;
12096 isec->call_check_in_progress = 1;
12097 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12098 isec->call_check_in_progress = 0;
12099 if (recur != 0)
12100 ret = recur;
12101 }
12102 }
12103
12104 if (ret == 1)
12105 isec->makes_toc_func_call = 1;
12106
12107 return ret;
12108}
12109
12110/* The linker repeatedly calls this function for each input section,
12111 in the order that input sections are linked into output sections.
12112 Build lists of input sections to determine groupings between which
12113 we may insert linker stubs. */
12114
12115bfd_boolean
12116ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12117{
12118 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12119
12120 if (htab == NULL)
12121 return FALSE;
12122
12123 if ((isec->output_section->flags & SEC_CODE) != 0
12124 && isec->output_section->id < htab->sec_info_arr_size)
12125 {
12126 /* This happens to make the list in reverse order,
12127 which is what we want. */
12128 htab->sec_info[isec->id].u.list
12129 = htab->sec_info[isec->output_section->id].u.list;
12130 htab->sec_info[isec->output_section->id].u.list = isec;
12131 }
12132
12133 if (htab->multi_toc_needed)
12134 {
12135 /* Analyse sections that aren't already flagged as needing a
12136 valid toc pointer. Exclude .fixup for the linux kernel.
12137 .fixup contains branches, but only back to the function that
12138 hit an exception. */
12139 if (!(isec->has_toc_reloc
12140 || (isec->flags & SEC_CODE) == 0
12141 || strcmp (isec->name, ".fixup") == 0
12142 || isec->call_check_done))
12143 {
12144 if (toc_adjusting_stub_needed (info, isec) < 0)
12145 return FALSE;
12146 }
12147 /* Make all sections use the TOC assigned for this object file.
12148 This will be wrong for pasted sections; We fix that in
12149 check_pasted_section(). */
12150 if (elf_gp (isec->owner) != 0)
12151 htab->toc_curr = elf_gp (isec->owner);
12152 }
12153
12154 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12155 return TRUE;
12156}
12157
12158/* Check that all .init and .fini sections use the same toc, if they
12159 have toc relocs. */
12160
12161static bfd_boolean
12162check_pasted_section (struct bfd_link_info *info, const char *name)
12163{
12164 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12165
12166 if (o != NULL)
12167 {
12168 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12169 bfd_vma toc_off = 0;
12170 asection *i;
12171
12172 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12173 if (i->has_toc_reloc)
12174 {
12175 if (toc_off == 0)
12176 toc_off = htab->sec_info[i->id].toc_off;
12177 else if (toc_off != htab->sec_info[i->id].toc_off)
12178 return FALSE;
12179 }
12180
12181 if (toc_off == 0)
12182 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12183 if (i->makes_toc_func_call)
12184 {
12185 toc_off = htab->sec_info[i->id].toc_off;
12186 break;
12187 }
12188
12189 /* Make sure the whole pasted function uses the same toc offset. */
12190 if (toc_off != 0)
12191 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12192 htab->sec_info[i->id].toc_off = toc_off;
12193 }
12194 return TRUE;
12195}
12196
12197bfd_boolean
12198ppc64_elf_check_init_fini (struct bfd_link_info *info)
12199{
12200 return (check_pasted_section (info, ".init")
12201 & check_pasted_section (info, ".fini"));
12202}
12203
12204/* See whether we can group stub sections together. Grouping stub
12205 sections may result in fewer stubs. More importantly, we need to
12206 put all .init* and .fini* stubs at the beginning of the .init or
12207 .fini output sections respectively, because glibc splits the
12208 _init and _fini functions into multiple parts. Putting a stub in
12209 the middle of a function is not a good idea. */
12210
12211static bfd_boolean
12212group_sections (struct bfd_link_info *info,
12213 bfd_size_type stub_group_size,
12214 bfd_boolean stubs_always_before_branch)
12215{
12216 struct ppc_link_hash_table *htab;
12217 asection *osec;
12218 bfd_boolean suppress_size_errors;
12219
12220 htab = ppc_hash_table (info);
12221 if (htab == NULL)
12222 return FALSE;
12223
12224 suppress_size_errors = FALSE;
12225 if (stub_group_size == 1)
12226 {
12227 /* Default values. */
12228 if (stubs_always_before_branch)
12229 stub_group_size = 0x1e00000;
12230 else
12231 stub_group_size = 0x1c00000;
12232 suppress_size_errors = TRUE;
12233 }
12234
12235 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12236 {
12237 asection *tail;
12238
12239 if (osec->id >= htab->sec_info_arr_size)
12240 continue;
12241
12242 tail = htab->sec_info[osec->id].u.list;
12243 while (tail != NULL)
12244 {
12245 asection *curr;
12246 asection *prev;
12247 bfd_size_type total;
12248 bfd_boolean big_sec;
12249 bfd_vma curr_toc;
12250 struct map_stub *group;
12251 bfd_size_type group_size;
12252
12253 curr = tail;
12254 total = tail->size;
12255 group_size = (ppc64_elf_section_data (tail) != NULL
12256 && ppc64_elf_section_data (tail)->has_14bit_branch
12257 ? stub_group_size >> 10 : stub_group_size);
12258
12259 big_sec = total > group_size;
12260 if (big_sec && !suppress_size_errors)
12261 /* xgettext:c-format */
12262 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12263 tail->owner, tail);
12264 curr_toc = htab->sec_info[tail->id].toc_off;
12265
12266 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12267 && ((total += curr->output_offset - prev->output_offset)
12268 < (ppc64_elf_section_data (prev) != NULL
12269 && ppc64_elf_section_data (prev)->has_14bit_branch
12270 ? (group_size = stub_group_size >> 10) : group_size))
12271 && htab->sec_info[prev->id].toc_off == curr_toc)
12272 curr = prev;
12273
12274 /* OK, the size from the start of CURR to the end is less
12275 than group_size and thus can be handled by one stub
12276 section. (or the tail section is itself larger than
12277 group_size, in which case we may be toast.) We should
12278 really be keeping track of the total size of stubs added
12279 here, as stubs contribute to the final output section
12280 size. That's a little tricky, and this way will only
12281 break if stubs added make the total size more than 2^25,
12282 ie. for the default stub_group_size, if stubs total more
12283 than 2097152 bytes, or nearly 75000 plt call stubs. */
12284 group = bfd_alloc (curr->owner, sizeof (*group));
12285 if (group == NULL)
12286 return FALSE;
12287 group->link_sec = curr;
12288 group->stub_sec = NULL;
12289 group->needs_save_res = 0;
12290 group->tls_get_addr_opt_bctrl = -1u;
12291 group->next = htab->group;
12292 htab->group = group;
12293 do
12294 {
12295 prev = htab->sec_info[tail->id].u.list;
12296 /* Set up this stub group. */
12297 htab->sec_info[tail->id].u.group = group;
12298 }
12299 while (tail != curr && (tail = prev) != NULL);
12300
12301 /* But wait, there's more! Input sections up to group_size
12302 bytes before the stub section can be handled by it too.
12303 Don't do this if we have a really large section after the
12304 stubs, as adding more stubs increases the chance that
12305 branches may not reach into the stub section. */
12306 if (!stubs_always_before_branch && !big_sec)
12307 {
12308 total = 0;
12309 while (prev != NULL
12310 && ((total += tail->output_offset - prev->output_offset)
12311 < (ppc64_elf_section_data (prev) != NULL
12312 && ppc64_elf_section_data (prev)->has_14bit_branch
12313 ? (group_size = stub_group_size >> 10) : group_size))
12314 && htab->sec_info[prev->id].toc_off == curr_toc)
12315 {
12316 tail = prev;
12317 prev = htab->sec_info[tail->id].u.list;
12318 htab->sec_info[tail->id].u.group = group;
12319 }
12320 }
12321 tail = prev;
12322 }
12323 }
12324 return TRUE;
12325}
12326
12327static const unsigned char glink_eh_frame_cie[] =
12328{
12329 0, 0, 0, 16, /* length. */
12330 0, 0, 0, 0, /* id. */
12331 1, /* CIE version. */
12332 'z', 'R', 0, /* Augmentation string. */
12333 4, /* Code alignment. */
12334 0x78, /* Data alignment. */
12335 65, /* RA reg. */
12336 1, /* Augmentation size. */
12337 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12338 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12339};
12340
12341static size_t
12342stub_eh_frame_size (struct map_stub *group, size_t align)
12343{
12344 size_t this_size = 17;
12345 if (group->tls_get_addr_opt_bctrl != -1u)
12346 {
12347 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12348 if (to_bctrl < 64)
12349 this_size += 1;
12350 else if (to_bctrl < 256)
12351 this_size += 2;
12352 else if (to_bctrl < 65536)
12353 this_size += 3;
12354 else
12355 this_size += 5;
12356 this_size += 6;
12357 }
12358 this_size = (this_size + align - 1) & -align;
12359 return this_size;
12360}
12361
12362/* Stripping output sections is normally done before dynamic section
12363 symbols have been allocated. This function is called later, and
12364 handles cases like htab->brlt which is mapped to its own output
12365 section. */
12366
12367static void
12368maybe_strip_output (struct bfd_link_info *info, asection *isec)
12369{
12370 if (isec->size == 0
12371 && isec->output_section->size == 0
12372 && !(isec->output_section->flags & SEC_KEEP)
12373 && !bfd_section_removed_from_list (info->output_bfd,
12374 isec->output_section)
12375 && elf_section_data (isec->output_section)->dynindx == 0)
12376 {
12377 isec->output_section->flags |= SEC_EXCLUDE;
12378 bfd_section_list_remove (info->output_bfd, isec->output_section);
12379 info->output_bfd->section_count--;
12380 }
12381}
12382
12383/* Determine and set the size of the stub section for a final link.
12384
12385 The basic idea here is to examine all the relocations looking for
12386 PC-relative calls to a target that is unreachable with a "bl"
12387 instruction. */
12388
12389bfd_boolean
12390ppc64_elf_size_stubs (struct bfd_link_info *info)
12391{
12392 bfd_size_type stub_group_size;
12393 bfd_boolean stubs_always_before_branch;
12394 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12395
12396 if (htab == NULL)
12397 return FALSE;
12398
12399 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12400 htab->params->plt_thread_safe = 1;
12401 if (!htab->opd_abi)
12402 htab->params->plt_thread_safe = 0;
12403 else if (htab->params->plt_thread_safe == -1)
12404 {
12405 static const char *const thread_starter[] =
12406 {
12407 "pthread_create",
12408 /* libstdc++ */
12409 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12410 /* librt */
12411 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12412 "mq_notify", "create_timer",
12413 /* libanl */
12414 "getaddrinfo_a",
12415 /* libgomp */
12416 "GOMP_parallel",
12417 "GOMP_parallel_start",
12418 "GOMP_parallel_loop_static",
12419 "GOMP_parallel_loop_static_start",
12420 "GOMP_parallel_loop_dynamic",
12421 "GOMP_parallel_loop_dynamic_start",
12422 "GOMP_parallel_loop_guided",
12423 "GOMP_parallel_loop_guided_start",
12424 "GOMP_parallel_loop_runtime",
12425 "GOMP_parallel_loop_runtime_start",
12426 "GOMP_parallel_sections",
12427 "GOMP_parallel_sections_start",
12428 /* libgo */
12429 "__go_go",
12430 };
12431 unsigned i;
12432
12433 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12434 {
12435 struct elf_link_hash_entry *h;
12436 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12437 FALSE, FALSE, TRUE);
12438 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12439 if (htab->params->plt_thread_safe)
12440 break;
12441 }
12442 }
12443 stubs_always_before_branch = htab->params->group_size < 0;
12444 if (htab->params->group_size < 0)
12445 stub_group_size = -htab->params->group_size;
12446 else
12447 stub_group_size = htab->params->group_size;
12448
12449 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12450 return FALSE;
12451
12452#define STUB_SHRINK_ITER 20
12453 /* Loop until no stubs added. After iteration 20 of this loop we may
12454 exit on a stub section shrinking. This is to break out of a
12455 pathological case where adding stubs on one iteration decreases
12456 section gaps (perhaps due to alignment), which then requires
12457 fewer or smaller stubs on the next iteration. */
12458
12459 while (1)
12460 {
12461 bfd *input_bfd;
12462 unsigned int bfd_indx;
12463 struct map_stub *group;
12464
12465 htab->stub_iteration += 1;
12466
12467 for (input_bfd = info->input_bfds, bfd_indx = 0;
12468 input_bfd != NULL;
12469 input_bfd = input_bfd->link.next, bfd_indx++)
12470 {
12471 Elf_Internal_Shdr *symtab_hdr;
12472 asection *section;
12473 Elf_Internal_Sym *local_syms = NULL;
12474
12475 if (!is_ppc64_elf (input_bfd))
12476 continue;
12477
12478 /* We'll need the symbol table in a second. */
12479 symtab_hdr = &elf_symtab_hdr (input_bfd);
12480 if (symtab_hdr->sh_info == 0)
12481 continue;
12482
12483 /* Walk over each section attached to the input bfd. */
12484 for (section = input_bfd->sections;
12485 section != NULL;
12486 section = section->next)
12487 {
12488 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12489
12490 /* If there aren't any relocs, then there's nothing more
12491 to do. */
12492 if ((section->flags & SEC_RELOC) == 0
12493 || (section->flags & SEC_ALLOC) == 0
12494 || (section->flags & SEC_LOAD) == 0
12495 || (section->flags & SEC_CODE) == 0
12496 || section->reloc_count == 0)
12497 continue;
12498
12499 /* If this section is a link-once section that will be
12500 discarded, then don't create any stubs. */
12501 if (section->output_section == NULL
12502 || section->output_section->owner != info->output_bfd)
12503 continue;
12504
12505 /* Get the relocs. */
12506 internal_relocs
12507 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12508 info->keep_memory);
12509 if (internal_relocs == NULL)
12510 goto error_ret_free_local;
12511
12512 /* Now examine each relocation. */
12513 irela = internal_relocs;
12514 irelaend = irela + section->reloc_count;
12515 for (; irela < irelaend; irela++)
12516 {
12517 enum elf_ppc64_reloc_type r_type;
12518 unsigned int r_indx;
12519 enum ppc_stub_type stub_type;
12520 struct ppc_stub_hash_entry *stub_entry;
12521 asection *sym_sec, *code_sec;
12522 bfd_vma sym_value, code_value;
12523 bfd_vma destination;
12524 unsigned long local_off;
12525 bfd_boolean ok_dest;
12526 struct ppc_link_hash_entry *hash;
12527 struct ppc_link_hash_entry *fdh;
12528 struct elf_link_hash_entry *h;
12529 Elf_Internal_Sym *sym;
12530 char *stub_name;
12531 const asection *id_sec;
12532 struct _opd_sec_data *opd;
12533 struct plt_entry *plt_ent;
12534
12535 r_type = ELF64_R_TYPE (irela->r_info);
12536 r_indx = ELF64_R_SYM (irela->r_info);
12537
12538 if (r_type >= R_PPC64_max)
12539 {
12540 bfd_set_error (bfd_error_bad_value);
12541 goto error_ret_free_internal;
12542 }
12543
12544 /* Only look for stubs on branch instructions. */
12545 if (r_type != R_PPC64_REL24
12546 && r_type != R_PPC64_REL14
12547 && r_type != R_PPC64_REL14_BRTAKEN
12548 && r_type != R_PPC64_REL14_BRNTAKEN)
12549 continue;
12550
12551 /* Now determine the call target, its name, value,
12552 section. */
12553 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12554 r_indx, input_bfd))
12555 goto error_ret_free_internal;
12556 hash = (struct ppc_link_hash_entry *) h;
12557
12558 ok_dest = FALSE;
12559 fdh = NULL;
12560 sym_value = 0;
12561 if (hash == NULL)
12562 {
12563 sym_value = sym->st_value;
12564 if (sym_sec != NULL
12565 && sym_sec->output_section != NULL)
12566 ok_dest = TRUE;
12567 }
12568 else if (hash->elf.root.type == bfd_link_hash_defined
12569 || hash->elf.root.type == bfd_link_hash_defweak)
12570 {
12571 sym_value = hash->elf.root.u.def.value;
12572 if (sym_sec->output_section != NULL)
12573 ok_dest = TRUE;
12574 }
12575 else if (hash->elf.root.type == bfd_link_hash_undefweak
12576 || hash->elf.root.type == bfd_link_hash_undefined)
12577 {
12578 /* Recognise an old ABI func code entry sym, and
12579 use the func descriptor sym instead if it is
12580 defined. */
12581 if (hash->elf.root.root.string[0] == '.'
12582 && hash->oh != NULL)
12583 {
12584 fdh = ppc_follow_link (hash->oh);
12585 if (fdh->elf.root.type == bfd_link_hash_defined
12586 || fdh->elf.root.type == bfd_link_hash_defweak)
12587 {
12588 sym_sec = fdh->elf.root.u.def.section;
12589 sym_value = fdh->elf.root.u.def.value;
12590 if (sym_sec->output_section != NULL)
12591 ok_dest = TRUE;
12592 }
12593 else
12594 fdh = NULL;
12595 }
12596 }
12597 else
12598 {
12599 bfd_set_error (bfd_error_bad_value);
12600 goto error_ret_free_internal;
12601 }
12602
12603 destination = 0;
12604 local_off = 0;
12605 if (ok_dest)
12606 {
12607 sym_value += irela->r_addend;
12608 destination = (sym_value
12609 + sym_sec->output_offset
12610 + sym_sec->output_section->vma);
12611 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12612 ? hash->elf.other
12613 : sym->st_other);
12614 }
12615
12616 code_sec = sym_sec;
12617 code_value = sym_value;
12618 opd = get_opd_info (sym_sec);
12619 if (opd != NULL)
12620 {
12621 bfd_vma dest;
12622
12623 if (hash == NULL && opd->adjust != NULL)
12624 {
12625 long adjust = opd->adjust[OPD_NDX (sym_value)];
12626 if (adjust == -1)
12627 continue;
12628 code_value += adjust;
12629 sym_value += adjust;
12630 }
12631 dest = opd_entry_value (sym_sec, sym_value,
12632 &code_sec, &code_value, FALSE);
12633 if (dest != (bfd_vma) -1)
12634 {
12635 destination = dest;
12636 if (fdh != NULL)
12637 {
12638 /* Fixup old ABI sym to point at code
12639 entry. */
12640 hash->elf.root.type = bfd_link_hash_defweak;
12641 hash->elf.root.u.def.section = code_sec;
12642 hash->elf.root.u.def.value = code_value;
12643 }
12644 }
12645 }
12646
12647 /* Determine what (if any) linker stub is needed. */
12648 plt_ent = NULL;
12649 stub_type = ppc_type_of_stub (section, irela, &hash,
12650 &plt_ent, destination,
12651 local_off);
12652
12653 if (stub_type != ppc_stub_plt_call)
12654 {
12655 /* Check whether we need a TOC adjusting stub.
12656 Since the linker pastes together pieces from
12657 different object files when creating the
12658 _init and _fini functions, it may be that a
12659 call to what looks like a local sym is in
12660 fact a call needing a TOC adjustment. */
12661 if (code_sec != NULL
12662 && code_sec->output_section != NULL
12663 && (htab->sec_info[code_sec->id].toc_off
12664 != htab->sec_info[section->id].toc_off)
12665 && (code_sec->has_toc_reloc
12666 || code_sec->makes_toc_func_call))
12667 stub_type = ppc_stub_long_branch_r2off;
12668 }
12669
12670 if (stub_type == ppc_stub_none)
12671 continue;
12672
12673 /* __tls_get_addr calls might be eliminated. */
12674 if (stub_type != ppc_stub_plt_call
12675 && hash != NULL
12676 && (hash == htab->tls_get_addr
12677 || hash == htab->tls_get_addr_fd)
12678 && section->has_tls_reloc
12679 && irela != internal_relocs)
12680 {
12681 /* Get tls info. */
12682 unsigned char *tls_mask;
12683
12684 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12685 irela - 1, input_bfd))
12686 goto error_ret_free_internal;
12687 if (*tls_mask != 0)
12688 continue;
12689 }
12690
12691 if (stub_type == ppc_stub_plt_call)
12692 {
12693 if (!htab->opd_abi
12694 && htab->params->plt_localentry0 != 0
12695 && is_elfv2_localentry0 (&hash->elf))
12696 htab->has_plt_localentry0 = 1;
12697 else if (irela + 1 < irelaend
12698 && irela[1].r_offset == irela->r_offset + 4
12699 && (ELF64_R_TYPE (irela[1].r_info)
12700 == R_PPC64_TOCSAVE))
12701 {
12702 if (!tocsave_find (htab, INSERT,
12703 &local_syms, irela + 1, input_bfd))
12704 goto error_ret_free_internal;
12705 }
12706 else
12707 stub_type = ppc_stub_plt_call_r2save;
12708 }
12709
12710 /* Support for grouping stub sections. */
12711 id_sec = htab->sec_info[section->id].u.group->link_sec;
12712
12713 /* Get the name of this stub. */
12714 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12715 if (!stub_name)
12716 goto error_ret_free_internal;
12717
12718 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12719 stub_name, FALSE, FALSE);
12720 if (stub_entry != NULL)
12721 {
12722 /* The proper stub has already been created. */
12723 free (stub_name);
12724 if (stub_type == ppc_stub_plt_call_r2save)
12725 stub_entry->stub_type = stub_type;
12726 continue;
12727 }
12728
12729 stub_entry = ppc_add_stub (stub_name, section, info);
12730 if (stub_entry == NULL)
12731 {
12732 free (stub_name);
12733 error_ret_free_internal:
12734 if (elf_section_data (section)->relocs == NULL)
12735 free (internal_relocs);
12736 error_ret_free_local:
12737 if (local_syms != NULL
12738 && (symtab_hdr->contents
12739 != (unsigned char *) local_syms))
12740 free (local_syms);
12741 return FALSE;
12742 }
12743
12744 stub_entry->stub_type = stub_type;
12745 if (stub_type != ppc_stub_plt_call
12746 && stub_type != ppc_stub_plt_call_r2save)
12747 {
12748 stub_entry->target_value = code_value;
12749 stub_entry->target_section = code_sec;
12750 }
12751 else
12752 {
12753 stub_entry->target_value = sym_value;
12754 stub_entry->target_section = sym_sec;
12755 }
12756 stub_entry->h = hash;
12757 stub_entry->plt_ent = plt_ent;
12758 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12759
12760 if (stub_entry->h != NULL)
12761 htab->stub_globals += 1;
12762 }
12763
12764 /* We're done with the internal relocs, free them. */
12765 if (elf_section_data (section)->relocs != internal_relocs)
12766 free (internal_relocs);
12767 }
12768
12769 if (local_syms != NULL
12770 && symtab_hdr->contents != (unsigned char *) local_syms)
12771 {
12772 if (!info->keep_memory)
12773 free (local_syms);
12774 else
12775 symtab_hdr->contents = (unsigned char *) local_syms;
12776 }
12777 }
12778
12779 /* We may have added some stubs. Find out the new size of the
12780 stub sections. */
12781 for (group = htab->group; group != NULL; group = group->next)
12782 if (group->stub_sec != NULL)
12783 {
12784 asection *stub_sec = group->stub_sec;
12785
12786 if (htab->stub_iteration <= STUB_SHRINK_ITER
12787 || stub_sec->rawsize < stub_sec->size)
12788 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12789 stub_sec->rawsize = stub_sec->size;
12790 stub_sec->size = 0;
12791 stub_sec->reloc_count = 0;
12792 stub_sec->flags &= ~SEC_RELOC;
12793 }
12794
12795 htab->brlt->size = 0;
12796 htab->brlt->reloc_count = 0;
12797 htab->brlt->flags &= ~SEC_RELOC;
12798 if (htab->relbrlt != NULL)
12799 htab->relbrlt->size = 0;
12800
12801 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12802
12803 for (group = htab->group; group != NULL; group = group->next)
12804 if (group->needs_save_res)
12805 group->stub_sec->size += htab->sfpr->size;
12806
12807 if (info->emitrelocations
12808 && htab->glink != NULL && htab->glink->size != 0)
12809 {
12810 htab->glink->reloc_count = 1;
12811 htab->glink->flags |= SEC_RELOC;
12812 }
12813
12814 if (htab->glink_eh_frame != NULL
12815 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12816 && htab->glink_eh_frame->output_section->size != 0)
12817 {
12818 size_t size = 0, align = 4;
12819
12820 for (group = htab->group; group != NULL; group = group->next)
12821 if (group->stub_sec != NULL)
12822 size += stub_eh_frame_size (group, align);
12823 if (htab->glink != NULL && htab->glink->size != 0)
12824 size += (24 + align - 1) & -align;
12825 if (size != 0)
12826 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12827 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12828 size = (size + align - 1) & -align;
12829 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12830 htab->glink_eh_frame->size = size;
12831 }
12832
12833 if (htab->params->plt_stub_align != 0)
12834 for (group = htab->group; group != NULL; group = group->next)
12835 if (group->stub_sec != NULL)
12836 group->stub_sec->size = ((group->stub_sec->size
12837 + (1 << htab->params->plt_stub_align) - 1)
12838 & -(1 << htab->params->plt_stub_align));
12839
12840 for (group = htab->group; group != NULL; group = group->next)
12841 if (group->stub_sec != NULL
12842 && group->stub_sec->rawsize != group->stub_sec->size
12843 && (htab->stub_iteration <= STUB_SHRINK_ITER
12844 || group->stub_sec->rawsize < group->stub_sec->size))
12845 break;
12846
12847 if (group == NULL
12848 && (htab->glink_eh_frame == NULL
12849 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12850 break;
12851
12852 /* Ask the linker to do its stuff. */
12853 (*htab->params->layout_sections_again) ();
12854 }
12855
12856 if (htab->glink_eh_frame != NULL
12857 && htab->glink_eh_frame->size != 0)
12858 {
12859 bfd_vma val;
12860 bfd_byte *p, *last_fde;
12861 size_t last_fde_len, size, align, pad;
12862 struct map_stub *group;
12863
12864 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12865 if (p == NULL)
12866 return FALSE;
12867 htab->glink_eh_frame->contents = p;
12868 last_fde = p;
12869 align = 4;
12870
12871 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12872 /* CIE length (rewrite in case little-endian). */
12873 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12874 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12875 p += last_fde_len + 4;
12876
12877 for (group = htab->group; group != NULL; group = group->next)
12878 if (group->stub_sec != NULL)
12879 {
12880 last_fde = p;
12881 last_fde_len = stub_eh_frame_size (group, align) - 4;
12882 /* FDE length. */
12883 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12884 p += 4;
12885 /* CIE pointer. */
12886 val = p - htab->glink_eh_frame->contents;
12887 bfd_put_32 (htab->elf.dynobj, val, p);
12888 p += 4;
12889 /* Offset to stub section, written later. */
12890 p += 4;
12891 /* stub section size. */
12892 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12893 p += 4;
12894 /* Augmentation. */
12895 p += 1;
12896 if (group->tls_get_addr_opt_bctrl != -1u)
12897 {
12898 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12899
12900 /* This FDE needs more than just the default.
12901 Describe __tls_get_addr_opt stub LR. */
12902 if (to_bctrl < 64)
12903 *p++ = DW_CFA_advance_loc + to_bctrl;
12904 else if (to_bctrl < 256)
12905 {
12906 *p++ = DW_CFA_advance_loc1;
12907 *p++ = to_bctrl;
12908 }
12909 else if (to_bctrl < 65536)
12910 {
12911 *p++ = DW_CFA_advance_loc2;
12912 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12913 p += 2;
12914 }
12915 else
12916 {
12917 *p++ = DW_CFA_advance_loc4;
12918 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12919 p += 4;
12920 }
12921 *p++ = DW_CFA_offset_extended_sf;
12922 *p++ = 65;
12923 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12924 *p++ = DW_CFA_advance_loc + 4;
12925 *p++ = DW_CFA_restore_extended;
12926 *p++ = 65;
12927 }
12928 /* Pad. */
12929 p = last_fde + last_fde_len + 4;
12930 }
12931 if (htab->glink != NULL && htab->glink->size != 0)
12932 {
12933 last_fde = p;
12934 last_fde_len = ((24 + align - 1) & -align) - 4;
12935 /* FDE length. */
12936 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12937 p += 4;
12938 /* CIE pointer. */
12939 val = p - htab->glink_eh_frame->contents;
12940 bfd_put_32 (htab->elf.dynobj, val, p);
12941 p += 4;
12942 /* Offset to .glink, written later. */
12943 p += 4;
12944 /* .glink size. */
12945 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12946 p += 4;
12947 /* Augmentation. */
12948 p += 1;
12949
12950 *p++ = DW_CFA_advance_loc + 1;
12951 *p++ = DW_CFA_register;
12952 *p++ = 65;
12953 *p++ = htab->opd_abi ? 12 : 0;
12954 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12955 *p++ = DW_CFA_restore_extended;
12956 *p++ = 65;
12957 p += ((24 + align - 1) & -align) - 24;
12958 }
12959 /* Subsume any padding into the last FDE if user .eh_frame
12960 sections are aligned more than glink_eh_frame. Otherwise any
12961 zero padding will be seen as a terminator. */
12962 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12963 size = p - htab->glink_eh_frame->contents;
12964 pad = ((size + align - 1) & -align) - size;
12965 htab->glink_eh_frame->size = size + pad;
12966 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12967 }
12968
12969 maybe_strip_output (info, htab->brlt);
12970 if (htab->glink_eh_frame != NULL)
12971 maybe_strip_output (info, htab->glink_eh_frame);
12972
12973 return TRUE;
12974}
12975
12976/* Called after we have determined section placement. If sections
12977 move, we'll be called again. Provide a value for TOCstart. */
12978
12979bfd_vma
12980ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12981{
12982 asection *s;
12983 bfd_vma TOCstart, adjust;
12984
12985 if (info != NULL)
12986 {
12987 struct elf_link_hash_entry *h;
12988 struct elf_link_hash_table *htab = elf_hash_table (info);
12989
12990 if (is_elf_hash_table (htab)
12991 && htab->hgot != NULL)
12992 h = htab->hgot;
12993 else
12994 {
12995 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12996 if (is_elf_hash_table (htab))
12997 htab->hgot = h;
12998 }
12999 if (h != NULL
13000 && h->root.type == bfd_link_hash_defined
13001 && !h->root.linker_def
13002 && (!is_elf_hash_table (htab)
13003 || h->def_regular))
13004 {
13005 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
13006 + h->root.u.def.section->output_offset
13007 + h->root.u.def.section->output_section->vma);
13008 _bfd_set_gp_value (obfd, TOCstart);
13009 return TOCstart;
13010 }
13011 }
13012
13013 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
13014 order. The TOC starts where the first of these sections starts. */
13015 s = bfd_get_section_by_name (obfd, ".got");
13016 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13017 s = bfd_get_section_by_name (obfd, ".toc");
13018 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13019 s = bfd_get_section_by_name (obfd, ".tocbss");
13020 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13021 s = bfd_get_section_by_name (obfd, ".plt");
13022 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
13023 {
13024 /* This may happen for
13025 o references to TOC base (SYM@toc / TOC[tc0]) without a
13026 .toc directive
13027 o bad linker script
13028 o --gc-sections and empty TOC sections
13029
13030 FIXME: Warn user? */
13031
13032 /* Look for a likely section. We probably won't even be
13033 using TOCstart. */
13034 for (s = obfd->sections; s != NULL; s = s->next)
13035 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
13036 | SEC_EXCLUDE))
13037 == (SEC_ALLOC | SEC_SMALL_DATA))
13038 break;
13039 if (s == NULL)
13040 for (s = obfd->sections; s != NULL; s = s->next)
13041 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
13042 == (SEC_ALLOC | SEC_SMALL_DATA))
13043 break;
13044 if (s == NULL)
13045 for (s = obfd->sections; s != NULL; s = s->next)
13046 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
13047 == SEC_ALLOC)
13048 break;
13049 if (s == NULL)
13050 for (s = obfd->sections; s != NULL; s = s->next)
13051 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
13052 break;
13053 }
13054
13055 TOCstart = 0;
13056 if (s != NULL)
13057 TOCstart = s->output_section->vma + s->output_offset;
13058
13059 /* Force alignment. */
13060 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
13061 TOCstart -= adjust;
13062 _bfd_set_gp_value (obfd, TOCstart);
13063
13064 if (info != NULL && s != NULL)
13065 {
13066 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13067
13068 if (htab != NULL)
13069 {
13070 if (htab->elf.hgot != NULL)
13071 {
13072 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
13073 htab->elf.hgot->root.u.def.section = s;
13074 }
13075 }
13076 else
13077 {
13078 struct bfd_link_hash_entry *bh = NULL;
13079 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
13080 s, TOC_BASE_OFF - adjust,
13081 NULL, FALSE, FALSE, &bh);
13082 }
13083 }
13084 return TOCstart;
13085}
13086
13087/* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
13088 write out any global entry stubs. */
13089
13090static bfd_boolean
13091build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
13092{
13093 struct bfd_link_info *info;
13094 struct ppc_link_hash_table *htab;
13095 struct plt_entry *pent;
13096 asection *s;
13097
13098 if (h->root.type == bfd_link_hash_indirect)
13099 return TRUE;
13100
13101 if (!h->pointer_equality_needed)
13102 return TRUE;
13103
13104 if (h->def_regular)
13105 return TRUE;
13106
13107 info = inf;
13108 htab = ppc_hash_table (info);
13109 if (htab == NULL)
13110 return FALSE;
13111
13112 s = htab->glink;
13113 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13114 if (pent->plt.offset != (bfd_vma) -1
13115 && pent->addend == 0)
13116 {
13117 bfd_byte *p;
13118 asection *plt;
13119 bfd_vma off;
13120
13121 p = s->contents + h->root.u.def.value;
13122 plt = htab->elf.splt;
13123 if (!htab->elf.dynamic_sections_created
13124 || h->dynindx == -1)
13125 plt = htab->elf.iplt;
13126 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13127 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13128
13129 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13130 {
13131 info->callbacks->einfo
13132 (_("%P: linkage table error against `%T'\n"),
13133 h->root.root.string);
13134 bfd_set_error (bfd_error_bad_value);
13135 htab->stub_error = TRUE;
13136 }
13137
13138 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13139 if (htab->params->emit_stub_syms)
13140 {
13141 size_t len = strlen (h->root.root.string);
13142 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13143
13144 if (name == NULL)
13145 return FALSE;
13146
13147 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13148 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13149 if (h == NULL)
13150 return FALSE;
13151 if (h->root.type == bfd_link_hash_new)
13152 {
13153 h->root.type = bfd_link_hash_defined;
13154 h->root.u.def.section = s;
13155 h->root.u.def.value = p - s->contents;
13156 h->ref_regular = 1;
13157 h->def_regular = 1;
13158 h->ref_regular_nonweak = 1;
13159 h->forced_local = 1;
13160 h->non_elf = 0;
13161 h->root.linker_def = 1;
13162 }
13163 }
13164
13165 if (PPC_HA (off) != 0)
13166 {
13167 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13168 p += 4;
13169 }
13170 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13171 p += 4;
13172 bfd_put_32 (s->owner, MTCTR_R12, p);
13173 p += 4;
13174 bfd_put_32 (s->owner, BCTR, p);
13175 break;
13176 }
13177 return TRUE;
13178}
13179
13180/* Build all the stubs associated with the current output file.
13181 The stubs are kept in a hash table attached to the main linker
13182 hash table. This function is called via gldelf64ppc_finish. */
13183
13184bfd_boolean
13185ppc64_elf_build_stubs (struct bfd_link_info *info,
13186 char **stats)
13187{
13188 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13189 struct map_stub *group;
13190 asection *stub_sec;
13191 bfd_byte *p;
13192 int stub_sec_count = 0;
13193
13194 if (htab == NULL)
13195 return FALSE;
13196
13197 /* Allocate memory to hold the linker stubs. */
13198 for (group = htab->group; group != NULL; group = group->next)
13199 if ((stub_sec = group->stub_sec) != NULL
13200 && stub_sec->size != 0)
13201 {
13202 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13203 if (stub_sec->contents == NULL)
13204 return FALSE;
13205 stub_sec->size = 0;
13206 }
13207
13208 if (htab->glink != NULL && htab->glink->size != 0)
13209 {
13210 unsigned int indx;
13211 bfd_vma plt0;
13212
13213 /* Build the .glink plt call stub. */
13214 if (htab->params->emit_stub_syms)
13215 {
13216 struct elf_link_hash_entry *h;
13217 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13218 TRUE, FALSE, FALSE);
13219 if (h == NULL)
13220 return FALSE;
13221 if (h->root.type == bfd_link_hash_new)
13222 {
13223 h->root.type = bfd_link_hash_defined;
13224 h->root.u.def.section = htab->glink;
13225 h->root.u.def.value = 8;
13226 h->ref_regular = 1;
13227 h->def_regular = 1;
13228 h->ref_regular_nonweak = 1;
13229 h->forced_local = 1;
13230 h->non_elf = 0;
13231 h->root.linker_def = 1;
13232 }
13233 }
13234 plt0 = (htab->elf.splt->output_section->vma
13235 + htab->elf.splt->output_offset
13236 - 16);
13237 if (info->emitrelocations)
13238 {
13239 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13240 if (r == NULL)
13241 return FALSE;
13242 r->r_offset = (htab->glink->output_offset
13243 + htab->glink->output_section->vma);
13244 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13245 r->r_addend = plt0;
13246 }
13247 p = htab->glink->contents;
13248 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13249 bfd_put_64 (htab->glink->owner, plt0, p);
13250 p += 8;
13251 if (htab->opd_abi)
13252 {
13253 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13254 p += 4;
13255 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13256 p += 4;
13257 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13258 p += 4;
13259 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13260 p += 4;
13261 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13262 p += 4;
13263 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13264 p += 4;
13265 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13266 p += 4;
13267 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13268 p += 4;
13269 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13270 p += 4;
13271 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13272 p += 4;
13273 }
13274 else
13275 {
13276 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13277 p += 4;
13278 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13279 p += 4;
13280 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13281 p += 4;
13282 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13283 p += 4;
13284 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13285 p += 4;
13286 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13287 p += 4;
13288 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13289 p += 4;
13290 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13291 p += 4;
13292 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13293 p += 4;
13294 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13295 p += 4;
13296 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13297 p += 4;
13298 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13299 p += 4;
13300 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13301 p += 4;
13302 }
13303 bfd_put_32 (htab->glink->owner, BCTR, p);
13304 p += 4;
13305 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13306 {
13307 bfd_put_32 (htab->glink->owner, NOP, p);
13308 p += 4;
13309 }
13310
13311 /* Build the .glink lazy link call stubs. */
13312 indx = 0;
13313 while (p < htab->glink->contents + htab->glink->rawsize)
13314 {
13315 if (htab->opd_abi)
13316 {
13317 if (indx < 0x8000)
13318 {
13319 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13320 p += 4;
13321 }
13322 else
13323 {
13324 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13325 p += 4;
13326 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13327 p);
13328 p += 4;
13329 }
13330 }
13331 bfd_put_32 (htab->glink->owner,
13332 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13333 indx++;
13334 p += 4;
13335 }
13336
13337 /* Build .glink global entry stubs. */
13338 if (htab->glink->size > htab->glink->rawsize)
13339 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13340 }
13341
13342 if (htab->brlt != NULL && htab->brlt->size != 0)
13343 {
13344 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13345 htab->brlt->size);
13346 if (htab->brlt->contents == NULL)
13347 return FALSE;
13348 }
13349 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13350 {
13351 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13352 htab->relbrlt->size);
13353 if (htab->relbrlt->contents == NULL)
13354 return FALSE;
13355 }
13356
13357 /* Build the stubs as directed by the stub hash table. */
13358 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13359
13360 for (group = htab->group; group != NULL; group = group->next)
13361 if (group->needs_save_res)
13362 {
13363 stub_sec = group->stub_sec;
13364 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13365 htab->sfpr->size);
13366 if (htab->params->emit_stub_syms)
13367 {
13368 unsigned int i;
13369
13370 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13371 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13372 return FALSE;
13373 }
13374 stub_sec->size += htab->sfpr->size;
13375 }
13376
13377 if (htab->relbrlt != NULL)
13378 htab->relbrlt->reloc_count = 0;
13379
13380 if (htab->params->plt_stub_align != 0)
13381 for (group = htab->group; group != NULL; group = group->next)
13382 if ((stub_sec = group->stub_sec) != NULL)
13383 stub_sec->size = ((stub_sec->size
13384 + (1 << htab->params->plt_stub_align) - 1)
13385 & -(1 << htab->params->plt_stub_align));
13386
13387 for (group = htab->group; group != NULL; group = group->next)
13388 if ((stub_sec = group->stub_sec) != NULL)
13389 {
13390 stub_sec_count += 1;
13391 if (stub_sec->rawsize != stub_sec->size
13392 && (htab->stub_iteration <= STUB_SHRINK_ITER
13393 || stub_sec->rawsize < stub_sec->size))
13394 break;
13395 }
13396
13397 /* Note that the glink_eh_frame check here is not only testing that
13398 the generated size matched the calculated size but also that
13399 bfd_elf_discard_info didn't make any changes to the section. */
13400 if (group != NULL
13401 || (htab->glink_eh_frame != NULL
13402 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13403 {
13404 htab->stub_error = TRUE;
13405 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13406 }
13407
13408 if (htab->stub_error)
13409 return FALSE;
13410
13411 if (stats != NULL)
13412 {
13413 *stats = bfd_malloc (500);
13414 if (*stats == NULL)
13415 return FALSE;
13416
13417 sprintf (*stats, _("linker stubs in %u group%s\n"
13418 " branch %lu\n"
13419 " toc adjust %lu\n"
13420 " long branch %lu\n"
13421 " long toc adj %lu\n"
13422 " plt call %lu\n"
13423 " plt call toc %lu\n"
13424 " global entry %lu"),
13425 stub_sec_count,
13426 stub_sec_count == 1 ? "" : "s",
13427 htab->stub_count[ppc_stub_long_branch - 1],
13428 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13429 htab->stub_count[ppc_stub_plt_branch - 1],
13430 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13431 htab->stub_count[ppc_stub_plt_call - 1],
13432 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13433 htab->stub_count[ppc_stub_global_entry - 1]);
13434 }
13435 return TRUE;
13436}
13437
13438/* What to do when ld finds relocations against symbols defined in
13439 discarded sections. */
13440
13441static unsigned int
13442ppc64_elf_action_discarded (asection *sec)
13443{
13444 if (strcmp (".opd", sec->name) == 0)
13445 return 0;
13446
13447 if (strcmp (".toc", sec->name) == 0)
13448 return 0;
13449
13450 if (strcmp (".toc1", sec->name) == 0)
13451 return 0;
13452
13453 return _bfd_elf_default_action_discarded (sec);
13454}
13455
13456/* The RELOCATE_SECTION function is called by the ELF backend linker
13457 to handle the relocations for a section.
13458
13459 The relocs are always passed as Rela structures; if the section
13460 actually uses Rel structures, the r_addend field will always be
13461 zero.
13462
13463 This function is responsible for adjust the section contents as
13464 necessary, and (if using Rela relocs and generating a
13465 relocatable output file) adjusting the reloc addend as
13466 necessary.
13467
13468 This function does not have to worry about setting the reloc
13469 address or the reloc symbol index.
13470
13471 LOCAL_SYMS is a pointer to the swapped in local symbols.
13472
13473 LOCAL_SECTIONS is an array giving the section in the input file
13474 corresponding to the st_shndx field of each local symbol.
13475
13476 The global hash table entry for the global symbols can be found
13477 via elf_sym_hashes (input_bfd).
13478
13479 When generating relocatable output, this function must handle
13480 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13481 going to be the section symbol corresponding to the output
13482 section, which means that the addend must be adjusted
13483 accordingly. */
13484
13485static bfd_boolean
13486ppc64_elf_relocate_section (bfd *output_bfd,
13487 struct bfd_link_info *info,
13488 bfd *input_bfd,
13489 asection *input_section,
13490 bfd_byte *contents,
13491 Elf_Internal_Rela *relocs,
13492 Elf_Internal_Sym *local_syms,
13493 asection **local_sections)
13494{
13495 struct ppc_link_hash_table *htab;
13496 Elf_Internal_Shdr *symtab_hdr;
13497 struct elf_link_hash_entry **sym_hashes;
13498 Elf_Internal_Rela *rel;
13499 Elf_Internal_Rela *wrel;
13500 Elf_Internal_Rela *relend;
13501 Elf_Internal_Rela outrel;
13502 bfd_byte *loc;
13503 struct got_entry **local_got_ents;
13504 bfd_vma TOCstart;
13505 bfd_boolean ret = TRUE;
13506 bfd_boolean is_opd;
13507 /* Assume 'at' branch hints. */
13508 bfd_boolean is_isa_v2 = TRUE;
13509 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13510
13511 /* Initialize howto table if needed. */
13512 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13513 ppc_howto_init ();
13514
13515 htab = ppc_hash_table (info);
13516 if (htab == NULL)
13517 return FALSE;
13518
13519 /* Don't relocate stub sections. */
13520 if (input_section->owner == htab->params->stub_bfd)
13521 return TRUE;
13522
13523 BFD_ASSERT (is_ppc64_elf (input_bfd));
13524
13525 local_got_ents = elf_local_got_ents (input_bfd);
13526 TOCstart = elf_gp (output_bfd);
13527 symtab_hdr = &elf_symtab_hdr (input_bfd);
13528 sym_hashes = elf_sym_hashes (input_bfd);
13529 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13530
13531 rel = wrel = relocs;
13532 relend = relocs + input_section->reloc_count;
13533 for (; rel < relend; wrel++, rel++)
13534 {
13535 enum elf_ppc64_reloc_type r_type;
13536 bfd_vma addend;
13537 bfd_reloc_status_type r;
13538 Elf_Internal_Sym *sym;
13539 asection *sec;
13540 struct elf_link_hash_entry *h_elf;
13541 struct ppc_link_hash_entry *h;
13542 struct ppc_link_hash_entry *fdh;
13543 const char *sym_name;
13544 unsigned long r_symndx, toc_symndx;
13545 bfd_vma toc_addend;
13546 unsigned char tls_mask, tls_gd, tls_type;
13547 unsigned char sym_type;
13548 bfd_vma relocation;
13549 bfd_boolean unresolved_reloc;
13550 bfd_boolean warned;
13551 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13552 unsigned int insn;
13553 unsigned int mask;
13554 struct ppc_stub_hash_entry *stub_entry;
13555 bfd_vma max_br_offset;
13556 bfd_vma from;
13557 Elf_Internal_Rela orig_rel;
13558 reloc_howto_type *howto;
13559 struct reloc_howto_struct alt_howto;
13560
13561 again:
13562 orig_rel = *rel;
13563
13564 r_type = ELF64_R_TYPE (rel->r_info);
13565 r_symndx = ELF64_R_SYM (rel->r_info);
13566
13567 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13568 symbol of the previous ADDR64 reloc. The symbol gives us the
13569 proper TOC base to use. */
13570 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13571 && wrel != relocs
13572 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13573 && is_opd)
13574 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13575
13576 sym = NULL;
13577 sec = NULL;
13578 h_elf = NULL;
13579 sym_name = NULL;
13580 unresolved_reloc = FALSE;
13581 warned = FALSE;
13582
13583 if (r_symndx < symtab_hdr->sh_info)
13584 {
13585 /* It's a local symbol. */
13586 struct _opd_sec_data *opd;
13587
13588 sym = local_syms + r_symndx;
13589 sec = local_sections[r_symndx];
13590 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13591 sym_type = ELF64_ST_TYPE (sym->st_info);
13592 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13593 opd = get_opd_info (sec);
13594 if (opd != NULL && opd->adjust != NULL)
13595 {
13596 long adjust = opd->adjust[OPD_NDX (sym->st_value
13597 + rel->r_addend)];
13598 if (adjust == -1)
13599 relocation = 0;
13600 else
13601 {
13602 /* If this is a relocation against the opd section sym
13603 and we have edited .opd, adjust the reloc addend so
13604 that ld -r and ld --emit-relocs output is correct.
13605 If it is a reloc against some other .opd symbol,
13606 then the symbol value will be adjusted later. */
13607 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13608 rel->r_addend += adjust;
13609 else
13610 relocation += adjust;
13611 }
13612 }
13613 }
13614 else
13615 {
13616 bfd_boolean ignored;
13617
13618 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13619 r_symndx, symtab_hdr, sym_hashes,
13620 h_elf, sec, relocation,
13621 unresolved_reloc, warned, ignored);
13622 sym_name = h_elf->root.root.string;
13623 sym_type = h_elf->type;
13624 if (sec != NULL
13625 && sec->owner == output_bfd
13626 && strcmp (sec->name, ".opd") == 0)
13627 {
13628 /* This is a symbol defined in a linker script. All
13629 such are defined in output sections, even those
13630 defined by simple assignment from a symbol defined in
13631 an input section. Transfer the symbol to an
13632 appropriate input .opd section, so that a branch to
13633 this symbol will be mapped to the location specified
13634 by the opd entry. */
13635 struct bfd_link_order *lo;
13636 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13637 if (lo->type == bfd_indirect_link_order)
13638 {
13639 asection *isec = lo->u.indirect.section;
13640 if (h_elf->root.u.def.value >= isec->output_offset
13641 && h_elf->root.u.def.value < (isec->output_offset
13642 + isec->size))
13643 {
13644 h_elf->root.u.def.value -= isec->output_offset;
13645 h_elf->root.u.def.section = isec;
13646 sec = isec;
13647 break;
13648 }
13649 }
13650 }
13651 }
13652 h = (struct ppc_link_hash_entry *) h_elf;
13653
13654 if (sec != NULL && discarded_section (sec))
13655 {
13656 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13657 input_bfd, input_section,
13658 contents + rel->r_offset);
13659 wrel->r_offset = rel->r_offset;
13660 wrel->r_info = 0;
13661 wrel->r_addend = 0;
13662
13663 /* For ld -r, remove relocations in debug sections against
13664 sections defined in discarded sections. Not done for
13665 non-debug to preserve relocs in .eh_frame which the
13666 eh_frame editing code expects to be present. */
13667 if (bfd_link_relocatable (info)
13668 && (input_section->flags & SEC_DEBUGGING))
13669 wrel--;
13670
13671 continue;
13672 }
13673
13674 if (bfd_link_relocatable (info))
13675 goto copy_reloc;
13676
13677 if (h != NULL && &h->elf == htab->elf.hgot)
13678 {
13679 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13680 sec = bfd_abs_section_ptr;
13681 unresolved_reloc = FALSE;
13682 }
13683
13684 /* TLS optimizations. Replace instruction sequences and relocs
13685 based on information we collected in tls_optimize. We edit
13686 RELOCS so that --emit-relocs will output something sensible
13687 for the final instruction stream. */
13688 tls_mask = 0;
13689 tls_gd = 0;
13690 toc_symndx = 0;
13691 if (h != NULL)
13692 tls_mask = h->tls_mask;
13693 else if (local_got_ents != NULL)
13694 {
13695 struct plt_entry **local_plt = (struct plt_entry **)
13696 (local_got_ents + symtab_hdr->sh_info);
13697 unsigned char *lgot_masks = (unsigned char *)
13698 (local_plt + symtab_hdr->sh_info);
13699 tls_mask = lgot_masks[r_symndx];
13700 }
13701 if (tls_mask == 0
13702 && (r_type == R_PPC64_TLS
13703 || r_type == R_PPC64_TLSGD
13704 || r_type == R_PPC64_TLSLD))
13705 {
13706 /* Check for toc tls entries. */
13707 unsigned char *toc_tls;
13708
13709 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13710 &local_syms, rel, input_bfd))
13711 return FALSE;
13712
13713 if (toc_tls)
13714 tls_mask = *toc_tls;
13715 }
13716
13717 /* Check that tls relocs are used with tls syms, and non-tls
13718 relocs are used with non-tls syms. */
13719 if (r_symndx != STN_UNDEF
13720 && r_type != R_PPC64_NONE
13721 && (h == NULL
13722 || h->elf.root.type == bfd_link_hash_defined
13723 || h->elf.root.type == bfd_link_hash_defweak)
13724 && (IS_PPC64_TLS_RELOC (r_type)
13725 != (sym_type == STT_TLS
13726 || (sym_type == STT_SECTION
13727 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13728 {
13729 if (tls_mask != 0
13730 && (r_type == R_PPC64_TLS
13731 || r_type == R_PPC64_TLSGD
13732 || r_type == R_PPC64_TLSLD))
13733 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13734 ;
13735 else
13736 info->callbacks->einfo
13737 (!IS_PPC64_TLS_RELOC (r_type)
13738 /* xgettext:c-format */
13739 ? _("%H: %s used with TLS symbol `%T'\n")
13740 /* xgettext:c-format */
13741 : _("%H: %s used with non-TLS symbol `%T'\n"),
13742 input_bfd, input_section, rel->r_offset,
13743 ppc64_elf_howto_table[r_type]->name,
13744 sym_name);
13745 }
13746
13747 /* Ensure reloc mapping code below stays sane. */
13748 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13749 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13750 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13751 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13752 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13753 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13754 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13755 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13756 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13757 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13758 abort ();
13759
13760 switch (r_type)
13761 {
13762 default:
13763 break;
13764
13765 case R_PPC64_LO_DS_OPT:
13766 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13767 if ((insn & (0x3f << 26)) != 58u << 26)
13768 abort ();
13769 insn += (14u << 26) - (58u << 26);
13770 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13771 r_type = R_PPC64_TOC16_LO;
13772 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13773 break;
13774
13775 case R_PPC64_TOC16:
13776 case R_PPC64_TOC16_LO:
13777 case R_PPC64_TOC16_DS:
13778 case R_PPC64_TOC16_LO_DS:
13779 {
13780 /* Check for toc tls entries. */
13781 unsigned char *toc_tls;
13782 int retval;
13783
13784 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13785 &local_syms, rel, input_bfd);
13786 if (retval == 0)
13787 return FALSE;
13788
13789 if (toc_tls)
13790 {
13791 tls_mask = *toc_tls;
13792 if (r_type == R_PPC64_TOC16_DS
13793 || r_type == R_PPC64_TOC16_LO_DS)
13794 {
13795 if (tls_mask != 0
13796 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13797 goto toctprel;
13798 }
13799 else
13800 {
13801 /* If we found a GD reloc pair, then we might be
13802 doing a GD->IE transition. */
13803 if (retval == 2)
13804 {
13805 tls_gd = TLS_TPRELGD;
13806 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13807 goto tls_ldgd_opt;
13808 }
13809 else if (retval == 3)
13810 {
13811 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13812 goto tls_ldgd_opt;
13813 }
13814 }
13815 }
13816 }
13817 break;
13818
13819 case R_PPC64_GOT_TPREL16_HI:
13820 case R_PPC64_GOT_TPREL16_HA:
13821 if (tls_mask != 0
13822 && (tls_mask & TLS_TPREL) == 0)
13823 {
13824 rel->r_offset -= d_offset;
13825 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13826 r_type = R_PPC64_NONE;
13827 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13828 }
13829 break;
13830
13831 case R_PPC64_GOT_TPREL16_DS:
13832 case R_PPC64_GOT_TPREL16_LO_DS:
13833 if (tls_mask != 0
13834 && (tls_mask & TLS_TPREL) == 0)
13835 {
13836 toctprel:
13837 insn = bfd_get_32 (input_bfd,
13838 contents + rel->r_offset - d_offset);
13839 insn &= 31 << 21;
13840 insn |= 0x3c0d0000; /* addis 0,13,0 */
13841 bfd_put_32 (input_bfd, insn,
13842 contents + rel->r_offset - d_offset);
13843 r_type = R_PPC64_TPREL16_HA;
13844 if (toc_symndx != 0)
13845 {
13846 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13847 rel->r_addend = toc_addend;
13848 /* We changed the symbol. Start over in order to
13849 get h, sym, sec etc. right. */
13850 goto again;
13851 }
13852 else
13853 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13854 }
13855 break;
13856
13857 case R_PPC64_TLS:
13858 if (tls_mask != 0
13859 && (tls_mask & TLS_TPREL) == 0)
13860 {
13861 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13862 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13863 if (insn == 0)
13864 abort ();
13865 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13866 /* Was PPC64_TLS which sits on insn boundary, now
13867 PPC64_TPREL16_LO which is at low-order half-word. */
13868 rel->r_offset += d_offset;
13869 r_type = R_PPC64_TPREL16_LO;
13870 if (toc_symndx != 0)
13871 {
13872 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13873 rel->r_addend = toc_addend;
13874 /* We changed the symbol. Start over in order to
13875 get h, sym, sec etc. right. */
13876 goto again;
13877 }
13878 else
13879 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13880 }
13881 break;
13882
13883 case R_PPC64_GOT_TLSGD16_HI:
13884 case R_PPC64_GOT_TLSGD16_HA:
13885 tls_gd = TLS_TPRELGD;
13886 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13887 goto tls_gdld_hi;
13888 break;
13889
13890 case R_PPC64_GOT_TLSLD16_HI:
13891 case R_PPC64_GOT_TLSLD16_HA:
13892 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13893 {
13894 tls_gdld_hi:
13895 if ((tls_mask & tls_gd) != 0)
13896 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13897 + R_PPC64_GOT_TPREL16_DS);
13898 else
13899 {
13900 rel->r_offset -= d_offset;
13901 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13902 r_type = R_PPC64_NONE;
13903 }
13904 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13905 }
13906 break;
13907
13908 case R_PPC64_GOT_TLSGD16:
13909 case R_PPC64_GOT_TLSGD16_LO:
13910 tls_gd = TLS_TPRELGD;
13911 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13912 goto tls_ldgd_opt;
13913 break;
13914
13915 case R_PPC64_GOT_TLSLD16:
13916 case R_PPC64_GOT_TLSLD16_LO:
13917 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13918 {
13919 unsigned int insn1, insn2;
13920 bfd_vma offset;
13921
13922 tls_ldgd_opt:
13923 offset = (bfd_vma) -1;
13924 /* If not using the newer R_PPC64_TLSGD/LD to mark
13925 __tls_get_addr calls, we must trust that the call
13926 stays with its arg setup insns, ie. that the next
13927 reloc is the __tls_get_addr call associated with
13928 the current reloc. Edit both insns. */
13929 if (input_section->has_tls_get_addr_call
13930 && rel + 1 < relend
13931 && branch_reloc_hash_match (input_bfd, rel + 1,
13932 htab->tls_get_addr,
13933 htab->tls_get_addr_fd))
13934 offset = rel[1].r_offset;
13935 /* We read the low GOT_TLS (or TOC16) insn because we
13936 need to keep the destination reg. It may be
13937 something other than the usual r3, and moved to r3
13938 before the call by intervening code. */
13939 insn1 = bfd_get_32 (input_bfd,
13940 contents + rel->r_offset - d_offset);
13941 if ((tls_mask & tls_gd) != 0)
13942 {
13943 /* IE */
13944 insn1 &= (0x1f << 21) | (0x1f << 16);
13945 insn1 |= 58 << 26; /* ld */
13946 insn2 = 0x7c636a14; /* add 3,3,13 */
13947 if (offset != (bfd_vma) -1)
13948 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13949 if ((tls_mask & TLS_EXPLICIT) == 0)
13950 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13951 + R_PPC64_GOT_TPREL16_DS);
13952 else
13953 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13954 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13955 }
13956 else
13957 {
13958 /* LE */
13959 insn1 &= 0x1f << 21;
13960 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13961 insn2 = 0x38630000; /* addi 3,3,0 */
13962 if (tls_gd == 0)
13963 {
13964 /* Was an LD reloc. */
13965 if (toc_symndx)
13966 sec = local_sections[toc_symndx];
13967 for (r_symndx = 0;
13968 r_symndx < symtab_hdr->sh_info;
13969 r_symndx++)
13970 if (local_sections[r_symndx] == sec)
13971 break;
13972 if (r_symndx >= symtab_hdr->sh_info)
13973 r_symndx = STN_UNDEF;
13974 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13975 if (r_symndx != STN_UNDEF)
13976 rel->r_addend -= (local_syms[r_symndx].st_value
13977 + sec->output_offset
13978 + sec->output_section->vma);
13979 }
13980 else if (toc_symndx != 0)
13981 {
13982 r_symndx = toc_symndx;
13983 rel->r_addend = toc_addend;
13984 }
13985 r_type = R_PPC64_TPREL16_HA;
13986 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13987 if (offset != (bfd_vma) -1)
13988 {
13989 rel[1].r_info = ELF64_R_INFO (r_symndx,
13990 R_PPC64_TPREL16_LO);
13991 rel[1].r_offset = offset + d_offset;
13992 rel[1].r_addend = rel->r_addend;
13993 }
13994 }
13995 bfd_put_32 (input_bfd, insn1,
13996 contents + rel->r_offset - d_offset);
13997 if (offset != (bfd_vma) -1)
13998 bfd_put_32 (input_bfd, insn2, contents + offset);
13999 if ((tls_mask & tls_gd) == 0
14000 && (tls_gd == 0 || toc_symndx != 0))
14001 {
14002 /* We changed the symbol. Start over in order
14003 to get h, sym, sec etc. right. */
14004 goto again;
14005 }
14006 }
14007 break;
14008
14009 case R_PPC64_TLSGD:
14010 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
14011 {
14012 unsigned int insn2;
14013 bfd_vma offset = rel->r_offset;
14014
14015 if ((tls_mask & TLS_TPRELGD) != 0)
14016 {
14017 /* IE */
14018 r_type = R_PPC64_NONE;
14019 insn2 = 0x7c636a14; /* add 3,3,13 */
14020 }
14021 else
14022 {
14023 /* LE */
14024 if (toc_symndx != 0)
14025 {
14026 r_symndx = toc_symndx;
14027 rel->r_addend = toc_addend;
14028 }
14029 r_type = R_PPC64_TPREL16_LO;
14030 rel->r_offset = offset + d_offset;
14031 insn2 = 0x38630000; /* addi 3,3,0 */
14032 }
14033 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14034 /* Zap the reloc on the _tls_get_addr call too. */
14035 BFD_ASSERT (offset == rel[1].r_offset);
14036 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14037 bfd_put_32 (input_bfd, insn2, contents + offset);
14038 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
14039 goto again;
14040 }
14041 break;
14042
14043 case R_PPC64_TLSLD:
14044 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
14045 {
14046 unsigned int insn2;
14047 bfd_vma offset = rel->r_offset;
14048
14049 if (toc_symndx)
14050 sec = local_sections[toc_symndx];
14051 for (r_symndx = 0;
14052 r_symndx < symtab_hdr->sh_info;
14053 r_symndx++)
14054 if (local_sections[r_symndx] == sec)
14055 break;
14056 if (r_symndx >= symtab_hdr->sh_info)
14057 r_symndx = STN_UNDEF;
14058 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
14059 if (r_symndx != STN_UNDEF)
14060 rel->r_addend -= (local_syms[r_symndx].st_value
14061 + sec->output_offset
14062 + sec->output_section->vma);
14063
14064 r_type = R_PPC64_TPREL16_LO;
14065 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14066 rel->r_offset = offset + d_offset;
14067 /* Zap the reloc on the _tls_get_addr call too. */
14068 BFD_ASSERT (offset == rel[1].r_offset);
14069 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
14070 insn2 = 0x38630000; /* addi 3,3,0 */
14071 bfd_put_32 (input_bfd, insn2, contents + offset);
14072 goto again;
14073 }
14074 break;
14075
14076 case R_PPC64_DTPMOD64:
14077 if (rel + 1 < relend
14078 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
14079 && rel[1].r_offset == rel->r_offset + 8)
14080 {
14081 if ((tls_mask & TLS_GD) == 0)
14082 {
14083 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
14084 if ((tls_mask & TLS_TPRELGD) != 0)
14085 r_type = R_PPC64_TPREL64;
14086 else
14087 {
14088 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14089 r_type = R_PPC64_NONE;
14090 }
14091 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14092 }
14093 }
14094 else
14095 {
14096 if ((tls_mask & TLS_LD) == 0)
14097 {
14098 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14099 r_type = R_PPC64_NONE;
14100 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14101 }
14102 }
14103 break;
14104
14105 case R_PPC64_TPREL64:
14106 if ((tls_mask & TLS_TPREL) == 0)
14107 {
14108 r_type = R_PPC64_NONE;
14109 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14110 }
14111 break;
14112
14113 case R_PPC64_ENTRY:
14114 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14115 if (!bfd_link_pic (info)
14116 && !info->traditional_format
14117 && relocation + 0x80008000 <= 0xffffffff)
14118 {
14119 unsigned int insn1, insn2;
14120
14121 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14122 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14123 if ((insn1 & ~0xfffc) == LD_R2_0R12
14124 && insn2 == ADD_R2_R2_R12)
14125 {
14126 bfd_put_32 (input_bfd,
14127 LIS_R2 + PPC_HA (relocation),
14128 contents + rel->r_offset);
14129 bfd_put_32 (input_bfd,
14130 ADDI_R2_R2 + PPC_LO (relocation),
14131 contents + rel->r_offset + 4);
14132 }
14133 }
14134 else
14135 {
14136 relocation -= (rel->r_offset
14137 + input_section->output_offset
14138 + input_section->output_section->vma);
14139 if (relocation + 0x80008000 <= 0xffffffff)
14140 {
14141 unsigned int insn1, insn2;
14142
14143 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14144 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14145 if ((insn1 & ~0xfffc) == LD_R2_0R12
14146 && insn2 == ADD_R2_R2_R12)
14147 {
14148 bfd_put_32 (input_bfd,
14149 ADDIS_R2_R12 + PPC_HA (relocation),
14150 contents + rel->r_offset);
14151 bfd_put_32 (input_bfd,
14152 ADDI_R2_R2 + PPC_LO (relocation),
14153 contents + rel->r_offset + 4);
14154 }
14155 }
14156 }
14157 break;
14158
14159 case R_PPC64_REL16_HA:
14160 /* If we are generating a non-PIC executable, edit
14161 . 0: addis 2,12,.TOC.-0b@ha
14162 . addi 2,2,.TOC.-0b@l
14163 used by ELFv2 global entry points to set up r2, to
14164 . lis 2,.TOC.@ha
14165 . addi 2,2,.TOC.@l
14166 if .TOC. is in range. */
14167 if (!bfd_link_pic (info)
14168 && !info->traditional_format
14169 && !htab->opd_abi
14170 && rel->r_addend == d_offset
14171 && h != NULL && &h->elf == htab->elf.hgot
14172 && rel + 1 < relend
14173 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14174 && rel[1].r_offset == rel->r_offset + 4
14175 && rel[1].r_addend == rel->r_addend + 4
14176 && relocation + 0x80008000 <= 0xffffffff)
14177 {
14178 unsigned int insn1, insn2;
14179 bfd_vma offset = rel->r_offset - d_offset;
14180 insn1 = bfd_get_32 (input_bfd, contents + offset);
14181 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14182 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14183 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14184 {
14185 r_type = R_PPC64_ADDR16_HA;
14186 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14187 rel->r_addend -= d_offset;
14188 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14189 rel[1].r_addend -= d_offset + 4;
14190 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14191 }
14192 }
14193 break;
14194 }
14195
14196 /* Handle other relocations that tweak non-addend part of insn. */
14197 insn = 0;
14198 max_br_offset = 1 << 25;
14199 addend = rel->r_addend;
14200 reloc_dest = DEST_NORMAL;
14201 switch (r_type)
14202 {
14203 default:
14204 break;
14205
14206 case R_PPC64_TOCSAVE:
14207 if (relocation + addend == (rel->r_offset
14208 + input_section->output_offset
14209 + input_section->output_section->vma)
14210 && tocsave_find (htab, NO_INSERT,
14211 &local_syms, rel, input_bfd))
14212 {
14213 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14214 if (insn == NOP
14215 || insn == CROR_151515 || insn == CROR_313131)
14216 bfd_put_32 (input_bfd,
14217 STD_R2_0R1 + STK_TOC (htab),
14218 contents + rel->r_offset);
14219 }
14220 break;
14221
14222 /* Branch taken prediction relocations. */
14223 case R_PPC64_ADDR14_BRTAKEN:
14224 case R_PPC64_REL14_BRTAKEN:
14225 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14226 /* Fall through. */
14227
14228 /* Branch not taken prediction relocations. */
14229 case R_PPC64_ADDR14_BRNTAKEN:
14230 case R_PPC64_REL14_BRNTAKEN:
14231 insn |= bfd_get_32 (input_bfd,
14232 contents + rel->r_offset) & ~(0x01 << 21);
14233 /* Fall through. */
14234
14235 case R_PPC64_REL14:
14236 max_br_offset = 1 << 15;
14237 /* Fall through. */
14238
14239 case R_PPC64_REL24:
14240 /* Calls to functions with a different TOC, such as calls to
14241 shared objects, need to alter the TOC pointer. This is
14242 done using a linkage stub. A REL24 branching to these
14243 linkage stubs needs to be followed by a nop, as the nop
14244 will be replaced with an instruction to restore the TOC
14245 base pointer. */
14246 fdh = h;
14247 if (h != NULL
14248 && h->oh != NULL
14249 && h->oh->is_func_descriptor)
14250 fdh = ppc_follow_link (h->oh);
14251 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14252 htab);
14253 if (stub_entry != NULL
14254 && (stub_entry->stub_type == ppc_stub_plt_call
14255 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14256 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14257 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14258 {
14259 bfd_boolean can_plt_call = FALSE;
14260
14261 if (stub_entry->stub_type == ppc_stub_plt_call
14262 && !htab->opd_abi
14263 && htab->params->plt_localentry0 != 0
14264 && is_elfv2_localentry0 (&h->elf))
14265 {
14266 /* The function doesn't use or change r2. */
14267 can_plt_call = TRUE;
14268 }
14269
14270 /* All of these stubs may modify r2, so there must be a
14271 branch and link followed by a nop. The nop is
14272 replaced by an insn to restore r2. */
14273 else if (rel->r_offset + 8 <= input_section->size)
14274 {
14275 unsigned long br;
14276
14277 br = bfd_get_32 (input_bfd,
14278 contents + rel->r_offset);
14279 if ((br & 1) != 0)
14280 {
14281 unsigned long nop;
14282
14283 nop = bfd_get_32 (input_bfd,
14284 contents + rel->r_offset + 4);
14285 if (nop == NOP
14286 || nop == CROR_151515 || nop == CROR_313131)
14287 {
14288 if (h != NULL
14289 && (h == htab->tls_get_addr_fd
14290 || h == htab->tls_get_addr)
14291 && htab->params->tls_get_addr_opt)
14292 {
14293 /* Special stub used, leave nop alone. */
14294 }
14295 else
14296 bfd_put_32 (input_bfd,
14297 LD_R2_0R1 + STK_TOC (htab),
14298 contents + rel->r_offset + 4);
14299 can_plt_call = TRUE;
14300 }
14301 }
14302 }
14303
14304 if (!can_plt_call && h != NULL)
14305 {
14306 const char *name = h->elf.root.root.string;
14307
14308 if (*name == '.')
14309 ++name;
14310
14311 if (strncmp (name, "__libc_start_main", 17) == 0
14312 && (name[17] == 0 || name[17] == '@'))
14313 {
14314 /* Allow crt1 branch to go via a toc adjusting
14315 stub. Other calls that never return could do
14316 the same, if we could detect such. */
14317 can_plt_call = TRUE;
14318 }
14319 }
14320
14321 if (!can_plt_call)
14322 {
14323 /* g++ as of 20130507 emits self-calls without a
14324 following nop. This is arguably wrong since we
14325 have conflicting information. On the one hand a
14326 global symbol and on the other a local call
14327 sequence, but don't error for this special case.
14328 It isn't possible to cheaply verify we have
14329 exactly such a call. Allow all calls to the same
14330 section. */
14331 asection *code_sec = sec;
14332
14333 if (get_opd_info (sec) != NULL)
14334 {
14335 bfd_vma off = (relocation + addend
14336 - sec->output_section->vma
14337 - sec->output_offset);
14338
14339 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14340 }
14341 if (code_sec == input_section)
14342 can_plt_call = TRUE;
14343 }
14344
14345 if (!can_plt_call)
14346 {
14347 if (stub_entry->stub_type == ppc_stub_plt_call
14348 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14349 info->callbacks->einfo
14350 /* xgettext:c-format */
14351 (_("%H: call to `%T' lacks nop, can't restore toc; "
14352 "recompile with -fPIC\n"),
14353 input_bfd, input_section, rel->r_offset, sym_name);
14354 else
14355 info->callbacks->einfo
14356 /* xgettext:c-format */
14357 (_("%H: call to `%T' lacks nop, can't restore toc; "
14358 "(-mcmodel=small toc adjust stub)\n"),
14359 input_bfd, input_section, rel->r_offset, sym_name);
14360
14361 bfd_set_error (bfd_error_bad_value);
14362 ret = FALSE;
14363 }
14364
14365 if (can_plt_call
14366 && (stub_entry->stub_type == ppc_stub_plt_call
14367 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14368 unresolved_reloc = FALSE;
14369 }
14370
14371 if ((stub_entry == NULL
14372 || stub_entry->stub_type == ppc_stub_long_branch
14373 || stub_entry->stub_type == ppc_stub_plt_branch)
14374 && get_opd_info (sec) != NULL)
14375 {
14376 /* The branch destination is the value of the opd entry. */
14377 bfd_vma off = (relocation + addend
14378 - sec->output_section->vma
14379 - sec->output_offset);
14380 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14381 if (dest != (bfd_vma) -1)
14382 {
14383 relocation = dest;
14384 addend = 0;
14385 reloc_dest = DEST_OPD;
14386 }
14387 }
14388
14389 /* If the branch is out of reach we ought to have a long
14390 branch stub. */
14391 from = (rel->r_offset
14392 + input_section->output_offset
14393 + input_section->output_section->vma);
14394
14395 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14396 ? fdh->elf.other
14397 : sym->st_other);
14398
14399 if (stub_entry != NULL
14400 && (stub_entry->stub_type == ppc_stub_long_branch
14401 || stub_entry->stub_type == ppc_stub_plt_branch)
14402 && (r_type == R_PPC64_ADDR14_BRTAKEN
14403 || r_type == R_PPC64_ADDR14_BRNTAKEN
14404 || (relocation + addend - from + max_br_offset
14405 < 2 * max_br_offset)))
14406 /* Don't use the stub if this branch is in range. */
14407 stub_entry = NULL;
14408
14409 if (stub_entry != NULL)
14410 {
14411 /* Munge up the value and addend so that we call the stub
14412 rather than the procedure directly. */
14413 asection *stub_sec = stub_entry->group->stub_sec;
14414
14415 if (stub_entry->stub_type == ppc_stub_save_res)
14416 relocation += (stub_sec->output_offset
14417 + stub_sec->output_section->vma
14418 + stub_sec->size - htab->sfpr->size
14419 - htab->sfpr->output_offset
14420 - htab->sfpr->output_section->vma);
14421 else
14422 relocation = (stub_entry->stub_offset
14423 + stub_sec->output_offset
14424 + stub_sec->output_section->vma);
14425 addend = 0;
14426 reloc_dest = DEST_STUB;
14427
14428 if ((stub_entry->stub_type == ppc_stub_plt_call
14429 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14430 && (ALWAYS_EMIT_R2SAVE
14431 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14432 && rel + 1 < relend
14433 && rel[1].r_offset == rel->r_offset + 4
14434 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14435 relocation += 4;
14436 }
14437
14438 if (insn != 0)
14439 {
14440 if (is_isa_v2)
14441 {
14442 /* Set 'a' bit. This is 0b00010 in BO field for branch
14443 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14444 for branch on CTR insns (BO == 1a00t or 1a01t). */
14445 if ((insn & (0x14 << 21)) == (0x04 << 21))
14446 insn |= 0x02 << 21;
14447 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14448 insn |= 0x08 << 21;
14449 else
14450 break;
14451 }
14452 else
14453 {
14454 /* Invert 'y' bit if not the default. */
14455 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14456 insn ^= 0x01 << 21;
14457 }
14458
14459 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14460 }
14461
14462 /* NOP out calls to undefined weak functions.
14463 We can thus call a weak function without first
14464 checking whether the function is defined. */
14465 else if (h != NULL
14466 && h->elf.root.type == bfd_link_hash_undefweak
14467 && h->elf.dynindx == -1
14468 && r_type == R_PPC64_REL24
14469 && relocation == 0
14470 && addend == 0)
14471 {
14472 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14473 goto copy_reloc;
14474 }
14475 break;
14476 }
14477
14478 /* Set `addend'. */
14479 tls_type = 0;
14480 switch (r_type)
14481 {
14482 default:
14483 info->callbacks->einfo
14484 /* xgettext:c-format */
14485 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14486 input_bfd, (int) r_type, sym_name);
14487
14488 bfd_set_error (bfd_error_bad_value);
14489 ret = FALSE;
14490 goto copy_reloc;
14491
14492 case R_PPC64_NONE:
14493 case R_PPC64_TLS:
14494 case R_PPC64_TLSGD:
14495 case R_PPC64_TLSLD:
14496 case R_PPC64_TOCSAVE:
14497 case R_PPC64_GNU_VTINHERIT:
14498 case R_PPC64_GNU_VTENTRY:
14499 case R_PPC64_ENTRY:
14500 goto copy_reloc;
14501
14502 /* GOT16 relocations. Like an ADDR16 using the symbol's
14503 address in the GOT as relocation value instead of the
14504 symbol's value itself. Also, create a GOT entry for the
14505 symbol and put the symbol value there. */
14506 case R_PPC64_GOT_TLSGD16:
14507 case R_PPC64_GOT_TLSGD16_LO:
14508 case R_PPC64_GOT_TLSGD16_HI:
14509 case R_PPC64_GOT_TLSGD16_HA:
14510 tls_type = TLS_TLS | TLS_GD;
14511 goto dogot;
14512
14513 case R_PPC64_GOT_TLSLD16:
14514 case R_PPC64_GOT_TLSLD16_LO:
14515 case R_PPC64_GOT_TLSLD16_HI:
14516 case R_PPC64_GOT_TLSLD16_HA:
14517 tls_type = TLS_TLS | TLS_LD;
14518 goto dogot;
14519
14520 case R_PPC64_GOT_TPREL16_DS:
14521 case R_PPC64_GOT_TPREL16_LO_DS:
14522 case R_PPC64_GOT_TPREL16_HI:
14523 case R_PPC64_GOT_TPREL16_HA:
14524 tls_type = TLS_TLS | TLS_TPREL;
14525 goto dogot;
14526
14527 case R_PPC64_GOT_DTPREL16_DS:
14528 case R_PPC64_GOT_DTPREL16_LO_DS:
14529 case R_PPC64_GOT_DTPREL16_HI:
14530 case R_PPC64_GOT_DTPREL16_HA:
14531 tls_type = TLS_TLS | TLS_DTPREL;
14532 goto dogot;
14533
14534 case R_PPC64_GOT16:
14535 case R_PPC64_GOT16_LO:
14536 case R_PPC64_GOT16_HI:
14537 case R_PPC64_GOT16_HA:
14538 case R_PPC64_GOT16_DS:
14539 case R_PPC64_GOT16_LO_DS:
14540 dogot:
14541 {
14542 /* Relocation is to the entry for this symbol in the global
14543 offset table. */
14544 asection *got;
14545 bfd_vma *offp;
14546 bfd_vma off;
14547 unsigned long indx = 0;
14548 struct got_entry *ent;
14549
14550 if (tls_type == (TLS_TLS | TLS_LD)
14551 && (h == NULL
14552 || !h->elf.def_dynamic))
14553 ent = ppc64_tlsld_got (input_bfd);
14554 else
14555 {
14556 if (h != NULL)
14557 {
14558 if (!htab->elf.dynamic_sections_created
14559 || h->elf.dynindx == -1
14560 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14561 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14562 /* This is actually a static link, or it is a
14563 -Bsymbolic link and the symbol is defined
14564 locally, or the symbol was forced to be local
14565 because of a version file. */
14566 ;
14567 else
14568 {
14569 indx = h->elf.dynindx;
14570 unresolved_reloc = FALSE;
14571 }
14572 ent = h->elf.got.glist;
14573 }
14574 else
14575 {
14576 if (local_got_ents == NULL)
14577 abort ();
14578 ent = local_got_ents[r_symndx];
14579 }
14580
14581 for (; ent != NULL; ent = ent->next)
14582 if (ent->addend == orig_rel.r_addend
14583 && ent->owner == input_bfd
14584 && ent->tls_type == tls_type)
14585 break;
14586 }
14587
14588 if (ent == NULL)
14589 abort ();
14590 if (ent->is_indirect)
14591 ent = ent->got.ent;
14592 offp = &ent->got.offset;
14593 got = ppc64_elf_tdata (ent->owner)->got;
14594 if (got == NULL)
14595 abort ();
14596
14597 /* The offset must always be a multiple of 8. We use the
14598 least significant bit to record whether we have already
14599 processed this entry. */
14600 off = *offp;
14601 if ((off & 1) != 0)
14602 off &= ~1;
14603 else
14604 {
14605 /* Generate relocs for the dynamic linker, except in
14606 the case of TLSLD where we'll use one entry per
14607 module. */
14608 asection *relgot;
14609 bfd_boolean ifunc;
14610
14611 *offp = off | 1;
14612 relgot = NULL;
14613 ifunc = (h != NULL
14614 ? h->elf.type == STT_GNU_IFUNC
14615 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14616 if (ifunc)
14617 {
14618 relgot = htab->elf.irelplt;
14619 if (indx == 0)
14620 htab->local_ifunc_resolver = 1;
14621 else if (is_static_defined (&h->elf))
14622 htab->maybe_local_ifunc_resolver = 1;
14623 }
14624 else if (indx != 0
14625 || (bfd_link_pic (info)
14626 && (h == NULL
14627 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14628 || (tls_type == (TLS_TLS | TLS_LD)
14629 && !h->elf.def_dynamic))))
14630 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14631 if (relgot != NULL)
14632 {
14633 outrel.r_offset = (got->output_section->vma
14634 + got->output_offset
14635 + off);
14636 outrel.r_addend = addend;
14637 if (tls_type & (TLS_LD | TLS_GD))
14638 {
14639 outrel.r_addend = 0;
14640 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14641 if (tls_type == (TLS_TLS | TLS_GD))
14642 {
14643 loc = relgot->contents;
14644 loc += (relgot->reloc_count++
14645 * sizeof (Elf64_External_Rela));
14646 bfd_elf64_swap_reloca_out (output_bfd,
14647 &outrel, loc);
14648 outrel.r_offset += 8;
14649 outrel.r_addend = addend;
14650 outrel.r_info
14651 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14652 }
14653 }
14654 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14655 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14656 else if (tls_type == (TLS_TLS | TLS_TPREL))
14657 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14658 else if (indx != 0)
14659 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14660 else
14661 {
14662 if (ifunc)
14663 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14664 else
14665 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14666
14667 /* Write the .got section contents for the sake
14668 of prelink. */
14669 loc = got->contents + off;
14670 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14671 loc);
14672 }
14673
14674 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14675 {
14676 outrel.r_addend += relocation;
14677 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14678 {
14679 if (htab->elf.tls_sec == NULL)
14680 outrel.r_addend = 0;
14681 else
14682 outrel.r_addend -= htab->elf.tls_sec->vma;
14683 }
14684 }
14685 loc = relgot->contents;
14686 loc += (relgot->reloc_count++
14687 * sizeof (Elf64_External_Rela));
14688 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14689 }
14690
14691 /* Init the .got section contents here if we're not
14692 emitting a reloc. */
14693 else
14694 {
14695 relocation += addend;
14696 if (tls_type != 0)
14697 {
14698 if (htab->elf.tls_sec == NULL)
14699 relocation = 0;
14700 else
14701 {
14702 if (tls_type & TLS_LD)
14703 relocation = 0;
14704 else
14705 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14706 if (tls_type & TLS_TPREL)
14707 relocation += DTP_OFFSET - TP_OFFSET;
14708 }
14709
14710 if (tls_type & (TLS_GD | TLS_LD))
14711 {
14712 bfd_put_64 (output_bfd, relocation,
14713 got->contents + off + 8);
14714 relocation = 1;
14715 }
14716 }
14717 bfd_put_64 (output_bfd, relocation,
14718 got->contents + off);
14719 }
14720 }
14721
14722 if (off >= (bfd_vma) -2)
14723 abort ();
14724
14725 relocation = got->output_section->vma + got->output_offset + off;
14726 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14727 }
14728 break;
14729
14730 case R_PPC64_PLT16_HA:
14731 case R_PPC64_PLT16_HI:
14732 case R_PPC64_PLT16_LO:
14733 case R_PPC64_PLT32:
14734 case R_PPC64_PLT64:
14735 /* Relocation is to the entry for this symbol in the
14736 procedure linkage table. */
14737 {
14738 struct plt_entry **plt_list = NULL;
14739 if (h != NULL)
14740 plt_list = &h->elf.plt.plist;
14741 else if (local_got_ents != NULL)
14742 {
14743 struct plt_entry **local_plt = (struct plt_entry **)
14744 (local_got_ents + symtab_hdr->sh_info);
14745 unsigned char *local_got_tls_masks = (unsigned char *)
14746 (local_plt + symtab_hdr->sh_info);
14747 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14748 plt_list = local_plt + r_symndx;
14749 }
14750 if (plt_list)
14751 {
14752 struct plt_entry *ent;
14753
14754 for (ent = *plt_list; ent != NULL; ent = ent->next)
14755 if (ent->plt.offset != (bfd_vma) -1
14756 && ent->addend == orig_rel.r_addend)
14757 {
14758 asection *plt;
14759
14760 plt = htab->elf.splt;
14761 if (!htab->elf.dynamic_sections_created
14762 || h == NULL
14763 || h->elf.dynindx == -1)
14764 plt = htab->elf.iplt;
14765 relocation = (plt->output_section->vma
14766 + plt->output_offset
14767 + ent->plt.offset);
14768 addend = 0;
14769 unresolved_reloc = FALSE;
14770 break;
14771 }
14772 }
14773 }
14774 break;
14775
14776 case R_PPC64_TOC:
14777 /* Relocation value is TOC base. */
14778 relocation = TOCstart;
14779 if (r_symndx == STN_UNDEF)
14780 relocation += htab->sec_info[input_section->id].toc_off;
14781 else if (unresolved_reloc)
14782 ;
14783 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14784 relocation += htab->sec_info[sec->id].toc_off;
14785 else
14786 unresolved_reloc = TRUE;
14787 goto dodyn;
14788
14789 /* TOC16 relocs. We want the offset relative to the TOC base,
14790 which is the address of the start of the TOC plus 0x8000.
14791 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14792 in this order. */
14793 case R_PPC64_TOC16:
14794 case R_PPC64_TOC16_LO:
14795 case R_PPC64_TOC16_HI:
14796 case R_PPC64_TOC16_DS:
14797 case R_PPC64_TOC16_LO_DS:
14798 case R_PPC64_TOC16_HA:
14799 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14800 break;
14801
14802 /* Relocate against the beginning of the section. */
14803 case R_PPC64_SECTOFF:
14804 case R_PPC64_SECTOFF_LO:
14805 case R_PPC64_SECTOFF_HI:
14806 case R_PPC64_SECTOFF_DS:
14807 case R_PPC64_SECTOFF_LO_DS:
14808 case R_PPC64_SECTOFF_HA:
14809 if (sec != NULL)
14810 addend -= sec->output_section->vma;
14811 break;
14812
14813 case R_PPC64_REL16:
14814 case R_PPC64_REL16_LO:
14815 case R_PPC64_REL16_HI:
14816 case R_PPC64_REL16_HA:
14817 case R_PPC64_REL16DX_HA:
14818 break;
14819
14820 case R_PPC64_REL14:
14821 case R_PPC64_REL14_BRNTAKEN:
14822 case R_PPC64_REL14_BRTAKEN:
14823 case R_PPC64_REL24:
14824 break;
14825
14826 case R_PPC64_TPREL16:
14827 case R_PPC64_TPREL16_LO:
14828 case R_PPC64_TPREL16_HI:
14829 case R_PPC64_TPREL16_HA:
14830 case R_PPC64_TPREL16_DS:
14831 case R_PPC64_TPREL16_LO_DS:
14832 case R_PPC64_TPREL16_HIGH:
14833 case R_PPC64_TPREL16_HIGHA:
14834 case R_PPC64_TPREL16_HIGHER:
14835 case R_PPC64_TPREL16_HIGHERA:
14836 case R_PPC64_TPREL16_HIGHEST:
14837 case R_PPC64_TPREL16_HIGHESTA:
14838 if (h != NULL
14839 && h->elf.root.type == bfd_link_hash_undefweak
14840 && h->elf.dynindx == -1)
14841 {
14842 /* Make this relocation against an undefined weak symbol
14843 resolve to zero. This is really just a tweak, since
14844 code using weak externs ought to check that they are
14845 defined before using them. */
14846 bfd_byte *p = contents + rel->r_offset - d_offset;
14847
14848 insn = bfd_get_32 (input_bfd, p);
14849 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14850 if (insn != 0)
14851 bfd_put_32 (input_bfd, insn, p);
14852 break;
14853 }
14854 if (htab->elf.tls_sec != NULL)
14855 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14856 /* The TPREL16 relocs shouldn't really be used in shared
14857 libs or with non-local symbols as that will result in
14858 DT_TEXTREL being set, but support them anyway. */
14859 goto dodyn;
14860
14861 case R_PPC64_DTPREL16:
14862 case R_PPC64_DTPREL16_LO:
14863 case R_PPC64_DTPREL16_HI:
14864 case R_PPC64_DTPREL16_HA:
14865 case R_PPC64_DTPREL16_DS:
14866 case R_PPC64_DTPREL16_LO_DS:
14867 case R_PPC64_DTPREL16_HIGH:
14868 case R_PPC64_DTPREL16_HIGHA:
14869 case R_PPC64_DTPREL16_HIGHER:
14870 case R_PPC64_DTPREL16_HIGHERA:
14871 case R_PPC64_DTPREL16_HIGHEST:
14872 case R_PPC64_DTPREL16_HIGHESTA:
14873 if (htab->elf.tls_sec != NULL)
14874 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14875 break;
14876
14877 case R_PPC64_ADDR64_LOCAL:
14878 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14879 ? h->elf.other
14880 : sym->st_other);
14881 break;
14882
14883 case R_PPC64_DTPMOD64:
14884 relocation = 1;
14885 addend = 0;
14886 goto dodyn;
14887
14888 case R_PPC64_TPREL64:
14889 if (htab->elf.tls_sec != NULL)
14890 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14891 goto dodyn;
14892
14893 case R_PPC64_DTPREL64:
14894 if (htab->elf.tls_sec != NULL)
14895 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14896 /* Fall through. */
14897
14898 /* Relocations that may need to be propagated if this is a
14899 dynamic object. */
14900 case R_PPC64_REL30:
14901 case R_PPC64_REL32:
14902 case R_PPC64_REL64:
14903 case R_PPC64_ADDR14:
14904 case R_PPC64_ADDR14_BRNTAKEN:
14905 case R_PPC64_ADDR14_BRTAKEN:
14906 case R_PPC64_ADDR16:
14907 case R_PPC64_ADDR16_DS:
14908 case R_PPC64_ADDR16_HA:
14909 case R_PPC64_ADDR16_HI:
14910 case R_PPC64_ADDR16_HIGH:
14911 case R_PPC64_ADDR16_HIGHA:
14912 case R_PPC64_ADDR16_HIGHER:
14913 case R_PPC64_ADDR16_HIGHERA:
14914 case R_PPC64_ADDR16_HIGHEST:
14915 case R_PPC64_ADDR16_HIGHESTA:
14916 case R_PPC64_ADDR16_LO:
14917 case R_PPC64_ADDR16_LO_DS:
14918 case R_PPC64_ADDR24:
14919 case R_PPC64_ADDR32:
14920 case R_PPC64_ADDR64:
14921 case R_PPC64_UADDR16:
14922 case R_PPC64_UADDR32:
14923 case R_PPC64_UADDR64:
14924 dodyn:
14925 if ((input_section->flags & SEC_ALLOC) == 0)
14926 break;
14927
14928 if (NO_OPD_RELOCS && is_opd)
14929 break;
14930
14931 if (bfd_link_pic (info)
14932 ? ((h == NULL
14933 || h->dyn_relocs != NULL)
14934 && ((h != NULL && pc_dynrelocs (h))
14935 || must_be_dyn_reloc (info, r_type)))
14936 : (h != NULL
14937 ? h->dyn_relocs != NULL
14938 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14939 {
14940 bfd_boolean skip, relocate;
14941 asection *sreloc;
14942 bfd_vma out_off;
14943 long indx = 0;
14944
14945 /* When generating a dynamic object, these relocations
14946 are copied into the output file to be resolved at run
14947 time. */
14948
14949 skip = FALSE;
14950 relocate = FALSE;
14951
14952 out_off = _bfd_elf_section_offset (output_bfd, info,
14953 input_section, rel->r_offset);
14954 if (out_off == (bfd_vma) -1)
14955 skip = TRUE;
14956 else if (out_off == (bfd_vma) -2)
14957 skip = TRUE, relocate = TRUE;
14958 out_off += (input_section->output_section->vma
14959 + input_section->output_offset);
14960 outrel.r_offset = out_off;
14961 outrel.r_addend = rel->r_addend;
14962
14963 /* Optimize unaligned reloc use. */
14964 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14965 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14966 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14967 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14968 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14969 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14970 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14971 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14972 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14973
14974 if (skip)
14975 memset (&outrel, 0, sizeof outrel);
14976 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14977 && !is_opd
14978 && r_type != R_PPC64_TOC)
14979 {
14980 indx = h->elf.dynindx;
14981 BFD_ASSERT (indx != -1);
14982 outrel.r_info = ELF64_R_INFO (indx, r_type);
14983 }
14984 else
14985 {
14986 /* This symbol is local, or marked to become local,
14987 or this is an opd section reloc which must point
14988 at a local function. */
14989 outrel.r_addend += relocation;
14990 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14991 {
14992 if (is_opd && h != NULL)
14993 {
14994 /* Lie about opd entries. This case occurs
14995 when building shared libraries and we
14996 reference a function in another shared
14997 lib. The same thing happens for a weak
14998 definition in an application that's
14999 overridden by a strong definition in a
15000 shared lib. (I believe this is a generic
15001 bug in binutils handling of weak syms.)
15002 In these cases we won't use the opd
15003 entry in this lib. */
15004 unresolved_reloc = FALSE;
15005 }
15006 if (!is_opd
15007 && r_type == R_PPC64_ADDR64
15008 && (h != NULL
15009 ? h->elf.type == STT_GNU_IFUNC
15010 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
15011 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15012 else
15013 {
15014 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
15015
15016 /* We need to relocate .opd contents for ld.so.
15017 Prelink also wants simple and consistent rules
15018 for relocs. This make all RELATIVE relocs have
15019 *r_offset equal to r_addend. */
15020 relocate = TRUE;
15021 }
15022 }
15023 else
15024 {
15025 if (h != NULL
15026 ? h->elf.type == STT_GNU_IFUNC
15027 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15028 {
15029 info->callbacks->einfo
15030 /* xgettext:c-format */
15031 (_("%H: %s for indirect "
15032 "function `%T' unsupported\n"),
15033 input_bfd, input_section, rel->r_offset,
15034 ppc64_elf_howto_table[r_type]->name,
15035 sym_name);
15036 ret = FALSE;
15037 }
15038 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
15039 ;
15040 else if (sec == NULL || sec->owner == NULL)
15041 {
15042 bfd_set_error (bfd_error_bad_value);
15043 return FALSE;
15044 }
15045 else
15046 {
15047 asection *osec;
15048
15049 osec = sec->output_section;
15050 indx = elf_section_data (osec)->dynindx;
15051
15052 if (indx == 0)
15053 {
15054 if ((osec->flags & SEC_READONLY) == 0
15055 && htab->elf.data_index_section != NULL)
15056 osec = htab->elf.data_index_section;
15057 else
15058 osec = htab->elf.text_index_section;
15059 indx = elf_section_data (osec)->dynindx;
15060 }
15061 BFD_ASSERT (indx != 0);
15062
15063 /* We are turning this relocation into one
15064 against a section symbol, so subtract out
15065 the output section's address but not the
15066 offset of the input section in the output
15067 section. */
15068 outrel.r_addend -= osec->vma;
15069 }
15070
15071 outrel.r_info = ELF64_R_INFO (indx, r_type);
15072 }
15073 }
15074
15075 sreloc = elf_section_data (input_section)->sreloc;
15076 if (h != NULL
15077 ? h->elf.type == STT_GNU_IFUNC
15078 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15079 {
15080 sreloc = htab->elf.irelplt;
15081 if (indx == 0)
15082 htab->local_ifunc_resolver = 1;
15083 else if (is_static_defined (&h->elf))
15084 htab->maybe_local_ifunc_resolver = 1;
15085 }
15086 if (sreloc == NULL)
15087 abort ();
15088
15089 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15090 >= sreloc->size)
15091 abort ();
15092 loc = sreloc->contents;
15093 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15094 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15095
15096 /* If this reloc is against an external symbol, it will
15097 be computed at runtime, so there's no need to do
15098 anything now. However, for the sake of prelink ensure
15099 that the section contents are a known value. */
15100 if (! relocate)
15101 {
15102 unresolved_reloc = FALSE;
15103 /* The value chosen here is quite arbitrary as ld.so
15104 ignores section contents except for the special
15105 case of .opd where the contents might be accessed
15106 before relocation. Choose zero, as that won't
15107 cause reloc overflow. */
15108 relocation = 0;
15109 addend = 0;
15110 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15111 to improve backward compatibility with older
15112 versions of ld. */
15113 if (r_type == R_PPC64_ADDR64)
15114 addend = outrel.r_addend;
15115 /* Adjust pc_relative relocs to have zero in *r_offset. */
15116 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15117 addend = outrel.r_offset;
15118 }
15119 }
15120 break;
15121
15122 case R_PPC64_COPY:
15123 case R_PPC64_GLOB_DAT:
15124 case R_PPC64_JMP_SLOT:
15125 case R_PPC64_JMP_IREL:
15126 case R_PPC64_RELATIVE:
15127 /* We shouldn't ever see these dynamic relocs in relocatable
15128 files. */
15129 /* Fall through. */
15130
15131 case R_PPC64_PLTGOT16:
15132 case R_PPC64_PLTGOT16_DS:
15133 case R_PPC64_PLTGOT16_HA:
15134 case R_PPC64_PLTGOT16_HI:
15135 case R_PPC64_PLTGOT16_LO:
15136 case R_PPC64_PLTGOT16_LO_DS:
15137 case R_PPC64_PLTREL32:
15138 case R_PPC64_PLTREL64:
15139 /* These ones haven't been implemented yet. */
15140
15141 info->callbacks->einfo
15142 /* xgettext:c-format */
15143 (_("%P: %B: %s is not supported for `%T'\n"),
15144 input_bfd,
15145 ppc64_elf_howto_table[r_type]->name, sym_name);
15146
15147 bfd_set_error (bfd_error_invalid_operation);
15148 ret = FALSE;
15149 goto copy_reloc;
15150 }
15151
15152 /* Multi-instruction sequences that access the TOC can be
15153 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15154 to nop; addi rb,r2,x; */
15155 switch (r_type)
15156 {
15157 default:
15158 break;
15159
15160 case R_PPC64_GOT_TLSLD16_HI:
15161 case R_PPC64_GOT_TLSGD16_HI:
15162 case R_PPC64_GOT_TPREL16_HI:
15163 case R_PPC64_GOT_DTPREL16_HI:
15164 case R_PPC64_GOT16_HI:
15165 case R_PPC64_TOC16_HI:
15166 /* These relocs would only be useful if building up an
15167 offset to later add to r2, perhaps in an indexed
15168 addressing mode instruction. Don't try to optimize.
15169 Unfortunately, the possibility of someone building up an
15170 offset like this or even with the HA relocs, means that
15171 we need to check the high insn when optimizing the low
15172 insn. */
15173 break;
15174
15175 case R_PPC64_GOT_TLSLD16_HA:
15176 case R_PPC64_GOT_TLSGD16_HA:
15177 case R_PPC64_GOT_TPREL16_HA:
15178 case R_PPC64_GOT_DTPREL16_HA:
15179 case R_PPC64_GOT16_HA:
15180 case R_PPC64_TOC16_HA:
15181 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15182 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15183 {
15184 bfd_byte *p = contents + (rel->r_offset & ~3);
15185 bfd_put_32 (input_bfd, NOP, p);
15186 }
15187 break;
15188
15189 case R_PPC64_GOT_TLSLD16_LO:
15190 case R_PPC64_GOT_TLSGD16_LO:
15191 case R_PPC64_GOT_TPREL16_LO_DS:
15192 case R_PPC64_GOT_DTPREL16_LO_DS:
15193 case R_PPC64_GOT16_LO:
15194 case R_PPC64_GOT16_LO_DS:
15195 case R_PPC64_TOC16_LO:
15196 case R_PPC64_TOC16_LO_DS:
15197 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15198 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15199 {
15200 bfd_byte *p = contents + (rel->r_offset & ~3);
15201 insn = bfd_get_32 (input_bfd, p);
15202 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15203 {
15204 /* Transform addic to addi when we change reg. */
15205 insn &= ~((0x3f << 26) | (0x1f << 16));
15206 insn |= (14u << 26) | (2 << 16);
15207 }
15208 else
15209 {
15210 insn &= ~(0x1f << 16);
15211 insn |= 2 << 16;
15212 }
15213 bfd_put_32 (input_bfd, insn, p);
15214 }
15215 break;
15216 }
15217
15218 /* Do any further special processing. */
15219 howto = ppc64_elf_howto_table[(int) r_type];
15220 switch (r_type)
15221 {
15222 default:
15223 break;
15224
15225 case R_PPC64_REL16_HA:
15226 case R_PPC64_REL16DX_HA:
15227 case R_PPC64_ADDR16_HA:
15228 case R_PPC64_ADDR16_HIGHA:
15229 case R_PPC64_ADDR16_HIGHERA:
15230 case R_PPC64_ADDR16_HIGHESTA:
15231 case R_PPC64_TOC16_HA:
15232 case R_PPC64_SECTOFF_HA:
15233 case R_PPC64_TPREL16_HA:
15234 case R_PPC64_TPREL16_HIGHA:
15235 case R_PPC64_TPREL16_HIGHERA:
15236 case R_PPC64_TPREL16_HIGHESTA:
15237 case R_PPC64_DTPREL16_HA:
15238 case R_PPC64_DTPREL16_HIGHA:
15239 case R_PPC64_DTPREL16_HIGHERA:
15240 case R_PPC64_DTPREL16_HIGHESTA:
15241 /* It's just possible that this symbol is a weak symbol
15242 that's not actually defined anywhere. In that case,
15243 'sec' would be NULL, and we should leave the symbol
15244 alone (it will be set to zero elsewhere in the link). */
15245 if (sec == NULL)
15246 break;
15247 /* Fall through. */
15248
15249 case R_PPC64_GOT16_HA:
15250 case R_PPC64_PLTGOT16_HA:
15251 case R_PPC64_PLT16_HA:
15252 case R_PPC64_GOT_TLSGD16_HA:
15253 case R_PPC64_GOT_TLSLD16_HA:
15254 case R_PPC64_GOT_TPREL16_HA:
15255 case R_PPC64_GOT_DTPREL16_HA:
15256 /* Add 0x10000 if sign bit in 0:15 is set.
15257 Bits 0:15 are not used. */
15258 addend += 0x8000;
15259 break;
15260
15261 case R_PPC64_ADDR16_DS:
15262 case R_PPC64_ADDR16_LO_DS:
15263 case R_PPC64_GOT16_DS:
15264 case R_PPC64_GOT16_LO_DS:
15265 case R_PPC64_PLT16_LO_DS:
15266 case R_PPC64_SECTOFF_DS:
15267 case R_PPC64_SECTOFF_LO_DS:
15268 case R_PPC64_TOC16_DS:
15269 case R_PPC64_TOC16_LO_DS:
15270 case R_PPC64_PLTGOT16_DS:
15271 case R_PPC64_PLTGOT16_LO_DS:
15272 case R_PPC64_GOT_TPREL16_DS:
15273 case R_PPC64_GOT_TPREL16_LO_DS:
15274 case R_PPC64_GOT_DTPREL16_DS:
15275 case R_PPC64_GOT_DTPREL16_LO_DS:
15276 case R_PPC64_TPREL16_DS:
15277 case R_PPC64_TPREL16_LO_DS:
15278 case R_PPC64_DTPREL16_DS:
15279 case R_PPC64_DTPREL16_LO_DS:
15280 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15281 mask = 3;
15282 /* If this reloc is against an lq, lxv, or stxv insn, then
15283 the value must be a multiple of 16. This is somewhat of
15284 a hack, but the "correct" way to do this by defining _DQ
15285 forms of all the _DS relocs bloats all reloc switches in
15286 this file. It doesn't make much sense to use these
15287 relocs in data, so testing the insn should be safe. */
15288 if ((insn & (0x3f << 26)) == (56u << 26)
15289 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15290 mask = 15;
15291 relocation += addend;
15292 addend = insn & (mask ^ 3);
15293 if ((relocation & mask) != 0)
15294 {
15295 relocation ^= relocation & mask;
15296 info->callbacks->einfo
15297 /* xgettext:c-format */
15298 (_("%H: error: %s not a multiple of %u\n"),
15299 input_bfd, input_section, rel->r_offset,
15300 howto->name,
15301 mask + 1);
15302 bfd_set_error (bfd_error_bad_value);
15303 ret = FALSE;
15304 goto copy_reloc;
15305 }
15306 break;
15307 }
15308
15309 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15310 because such sections are not SEC_ALLOC and thus ld.so will
15311 not process them. */
15312 if (unresolved_reloc
15313 && !((input_section->flags & SEC_DEBUGGING) != 0
15314 && h->elf.def_dynamic)
15315 && _bfd_elf_section_offset (output_bfd, info, input_section,
15316 rel->r_offset) != (bfd_vma) -1)
15317 {
15318 info->callbacks->einfo
15319 /* xgettext:c-format */
15320 (_("%H: unresolvable %s against `%T'\n"),
15321 input_bfd, input_section, rel->r_offset,
15322 howto->name,
15323 h->elf.root.root.string);
15324 ret = FALSE;
15325 }
15326
15327 /* 16-bit fields in insns mostly have signed values, but a
15328 few insns have 16-bit unsigned values. Really, we should
15329 have different reloc types. */
15330 if (howto->complain_on_overflow != complain_overflow_dont
15331 && howto->dst_mask == 0xffff
15332 && (input_section->flags & SEC_CODE) != 0)
15333 {
15334 enum complain_overflow complain = complain_overflow_signed;
15335
15336 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15337 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15338 complain = complain_overflow_bitfield;
15339 else if (howto->rightshift == 0
15340 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15341 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15342 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15343 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15344 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15345 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15346 complain = complain_overflow_unsigned;
15347 if (howto->complain_on_overflow != complain)
15348 {
15349 alt_howto = *howto;
15350 alt_howto.complain_on_overflow = complain;
15351 howto = &alt_howto;
15352 }
15353 }
15354
15355 if (r_type == R_PPC64_REL16DX_HA)
15356 {
15357 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15358 if (rel->r_offset + 4 > input_section->size)
15359 r = bfd_reloc_outofrange;
15360 else
15361 {
15362 relocation += addend;
15363 relocation -= (rel->r_offset
15364 + input_section->output_offset
15365 + input_section->output_section->vma);
15366 relocation = (bfd_signed_vma) relocation >> 16;
15367 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15368 insn &= ~0x1fffc1;
15369 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15370 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15371 r = bfd_reloc_ok;
15372 if (relocation + 0x8000 > 0xffff)
15373 r = bfd_reloc_overflow;
15374 }
15375 }
15376 else
15377 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15378 rel->r_offset, relocation, addend);
15379
15380 if (r != bfd_reloc_ok)
15381 {
15382 char *more_info = NULL;
15383 const char *reloc_name = howto->name;
15384
15385 if (reloc_dest != DEST_NORMAL)
15386 {
15387 more_info = bfd_malloc (strlen (reloc_name) + 8);
15388 if (more_info != NULL)
15389 {
15390 strcpy (more_info, reloc_name);
15391 strcat (more_info, (reloc_dest == DEST_OPD
15392 ? " (OPD)" : " (stub)"));
15393 reloc_name = more_info;
15394 }
15395 }
15396
15397 if (r == bfd_reloc_overflow)
15398 {
15399 /* On code like "if (foo) foo();" don't report overflow
15400 on a branch to zero when foo is undefined. */
15401 if (!warned
15402 && (reloc_dest == DEST_STUB
15403 || !(h != NULL
15404 && (h->elf.root.type == bfd_link_hash_undefweak
15405 || h->elf.root.type == bfd_link_hash_undefined)
15406 && is_branch_reloc (r_type))))
15407 info->callbacks->reloc_overflow (info, &h->elf.root,
15408 sym_name, reloc_name,
15409 orig_rel.r_addend,
15410 input_bfd, input_section,
15411 rel->r_offset);
15412 }
15413 else
15414 {
15415 info->callbacks->einfo
15416 /* xgettext:c-format */
15417 (_("%H: %s against `%T': error %d\n"),
15418 input_bfd, input_section, rel->r_offset,
15419 reloc_name, sym_name, (int) r);
15420 ret = FALSE;
15421 }
15422 if (more_info != NULL)
15423 free (more_info);
15424 }
15425 copy_reloc:
15426 if (wrel != rel)
15427 *wrel = *rel;
15428 }
15429
15430 if (wrel != rel)
15431 {
15432 Elf_Internal_Shdr *rel_hdr;
15433 size_t deleted = rel - wrel;
15434
15435 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15436 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15437 if (rel_hdr->sh_size == 0)
15438 {
15439 /* It is too late to remove an empty reloc section. Leave
15440 one NONE reloc.
15441 ??? What is wrong with an empty section??? */
15442 rel_hdr->sh_size = rel_hdr->sh_entsize;
15443 deleted -= 1;
15444 }
15445 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15446 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15447 input_section->reloc_count -= deleted;
15448 }
15449
15450 /* If we're emitting relocations, then shortly after this function
15451 returns, reloc offsets and addends for this section will be
15452 adjusted. Worse, reloc symbol indices will be for the output
15453 file rather than the input. Save a copy of the relocs for
15454 opd_entry_value. */
15455 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15456 {
15457 bfd_size_type amt;
15458 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15459 rel = bfd_alloc (input_bfd, amt);
15460 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15461 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15462 if (rel == NULL)
15463 return FALSE;
15464 memcpy (rel, relocs, amt);
15465 }
15466 return ret;
15467}
15468
15469/* Adjust the value of any local symbols in opd sections. */
15470
15471static int
15472ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15473 const char *name ATTRIBUTE_UNUSED,
15474 Elf_Internal_Sym *elfsym,
15475 asection *input_sec,
15476 struct elf_link_hash_entry *h)
15477{
15478 struct _opd_sec_data *opd;
15479 long adjust;
15480 bfd_vma value;
15481
15482 if (h != NULL)
15483 return 1;
15484
15485 opd = get_opd_info (input_sec);
15486 if (opd == NULL || opd->adjust == NULL)
15487 return 1;
15488
15489 value = elfsym->st_value - input_sec->output_offset;
15490 if (!bfd_link_relocatable (info))
15491 value -= input_sec->output_section->vma;
15492
15493 adjust = opd->adjust[OPD_NDX (value)];
15494 if (adjust == -1)
15495 return 2;
15496
15497 elfsym->st_value += adjust;
15498 return 1;
15499}
15500
15501/* Finish up dynamic symbol handling. We set the contents of various
15502 dynamic sections here. */
15503
15504static bfd_boolean
15505ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15506 struct bfd_link_info *info,
15507 struct elf_link_hash_entry *h,
15508 Elf_Internal_Sym *sym)
15509{
15510 struct ppc_link_hash_table *htab;
15511 struct plt_entry *ent;
15512 Elf_Internal_Rela rela;
15513 bfd_byte *loc;
15514
15515 htab = ppc_hash_table (info);
15516 if (htab == NULL)
15517 return FALSE;
15518
15519 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15520 if (ent->plt.offset != (bfd_vma) -1)
15521 {
15522 /* This symbol has an entry in the procedure linkage
15523 table. Set it up. */
15524 if (!htab->elf.dynamic_sections_created
15525 || h->dynindx == -1)
15526 {
15527 BFD_ASSERT (h->type == STT_GNU_IFUNC
15528 && h->def_regular
15529 && (h->root.type == bfd_link_hash_defined
15530 || h->root.type == bfd_link_hash_defweak));
15531 rela.r_offset = (htab->elf.iplt->output_section->vma
15532 + htab->elf.iplt->output_offset
15533 + ent->plt.offset);
15534 if (htab->opd_abi)
15535 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15536 else
15537 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15538 rela.r_addend = (h->root.u.def.value
15539 + h->root.u.def.section->output_offset
15540 + h->root.u.def.section->output_section->vma
15541 + ent->addend);
15542 loc = (htab->elf.irelplt->contents
15543 + (htab->elf.irelplt->reloc_count++
15544 * sizeof (Elf64_External_Rela)));
15545 htab->local_ifunc_resolver = 1;
15546 }
15547 else
15548 {
15549 rela.r_offset = (htab->elf.splt->output_section->vma
15550 + htab->elf.splt->output_offset
15551 + ent->plt.offset);
15552 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15553 rela.r_addend = ent->addend;
15554 loc = (htab->elf.srelplt->contents
15555 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15556 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15557 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15558 htab->maybe_local_ifunc_resolver = 1;
15559 }
15560 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15561
15562 if (!htab->opd_abi)
15563 {
15564 if (!h->def_regular)
15565 {
15566 /* Mark the symbol as undefined, rather than as
15567 defined in glink. Leave the value if there were
15568 any relocations where pointer equality matters
15569 (this is a clue for the dynamic linker, to make
15570 function pointer comparisons work between an
15571 application and shared library), otherwise set it
15572 to zero. */
15573 sym->st_shndx = SHN_UNDEF;
15574 if (!h->pointer_equality_needed)
15575 sym->st_value = 0;
15576 else if (!h->ref_regular_nonweak)
15577 {
15578 /* This breaks function pointer comparisons, but
15579 that is better than breaking tests for a NULL
15580 function pointer. */
15581 sym->st_value = 0;
15582 }
15583 }
15584 }
15585 }
15586
15587 if (h->needs_copy)
15588 {
15589 /* This symbol needs a copy reloc. Set it up. */
15590 asection *srel;
15591
15592 if (h->dynindx == -1
15593 || (h->root.type != bfd_link_hash_defined
15594 && h->root.type != bfd_link_hash_defweak)
15595 || htab->elf.srelbss == NULL
15596 || htab->elf.sreldynrelro == NULL)
15597 abort ();
15598
15599 rela.r_offset = (h->root.u.def.value
15600 + h->root.u.def.section->output_section->vma
15601 + h->root.u.def.section->output_offset);
15602 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15603 rela.r_addend = 0;
15604 if (h->root.u.def.section == htab->elf.sdynrelro)
15605 srel = htab->elf.sreldynrelro;
15606 else
15607 srel = htab->elf.srelbss;
15608 loc = srel->contents;
15609 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15610 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15611 }
15612
15613 return TRUE;
15614}
15615
15616/* Used to decide how to sort relocs in an optimal manner for the
15617 dynamic linker, before writing them out. */
15618
15619static enum elf_reloc_type_class
15620ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15621 const asection *rel_sec,
15622 const Elf_Internal_Rela *rela)
15623{
15624 enum elf_ppc64_reloc_type r_type;
15625 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15626
15627 if (rel_sec == htab->elf.irelplt)
15628 return reloc_class_ifunc;
15629
15630 r_type = ELF64_R_TYPE (rela->r_info);
15631 switch (r_type)
15632 {
15633 case R_PPC64_RELATIVE:
15634 return reloc_class_relative;
15635 case R_PPC64_JMP_SLOT:
15636 return reloc_class_plt;
15637 case R_PPC64_COPY:
15638 return reloc_class_copy;
15639 default:
15640 return reloc_class_normal;
15641 }
15642}
15643
15644/* Finish up the dynamic sections. */
15645
15646static bfd_boolean
15647ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15648 struct bfd_link_info *info)
15649{
15650 struct ppc_link_hash_table *htab;
15651 bfd *dynobj;
15652 asection *sdyn;
15653
15654 htab = ppc_hash_table (info);
15655 if (htab == NULL)
15656 return FALSE;
15657
15658 dynobj = htab->elf.dynobj;
15659 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15660
15661 if (htab->elf.dynamic_sections_created)
15662 {
15663 Elf64_External_Dyn *dyncon, *dynconend;
15664
15665 if (sdyn == NULL || htab->elf.sgot == NULL)
15666 abort ();
15667
15668 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15669 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15670 for (; dyncon < dynconend; dyncon++)
15671 {
15672 Elf_Internal_Dyn dyn;
15673 asection *s;
15674
15675 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15676
15677 switch (dyn.d_tag)
15678 {
15679 default:
15680 continue;
15681
15682 case DT_PPC64_GLINK:
15683 s = htab->glink;
15684 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15685 /* We stupidly defined DT_PPC64_GLINK to be the start
15686 of glink rather than the first entry point, which is
15687 what ld.so needs, and now have a bigger stub to
15688 support automatic multiple TOCs. */
15689 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15690 break;
15691
15692 case DT_PPC64_OPD:
15693 s = bfd_get_section_by_name (output_bfd, ".opd");
15694 if (s == NULL)
15695 continue;
15696 dyn.d_un.d_ptr = s->vma;
15697 break;
15698
15699 case DT_PPC64_OPT:
15700 if (htab->do_multi_toc && htab->multi_toc_needed)
15701 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15702 if (htab->has_plt_localentry0)
15703 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15704 break;
15705
15706 case DT_PPC64_OPDSZ:
15707 s = bfd_get_section_by_name (output_bfd, ".opd");
15708 if (s == NULL)
15709 continue;
15710 dyn.d_un.d_val = s->size;
15711 break;
15712
15713 case DT_PLTGOT:
15714 s = htab->elf.splt;
15715 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15716 break;
15717
15718 case DT_JMPREL:
15719 s = htab->elf.srelplt;
15720 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15721 break;
15722
15723 case DT_PLTRELSZ:
15724 dyn.d_un.d_val = htab->elf.srelplt->size;
15725 break;
15726
15727 case DT_TEXTREL:
15728 if (htab->local_ifunc_resolver)
15729 info->callbacks->einfo
15730 (_("%X%P: text relocations and GNU indirect "
15731 "functions will result in a segfault at runtime\n"));
15732 else if (htab->maybe_local_ifunc_resolver)
15733 info->callbacks->einfo
15734 (_("%P: warning: text relocations and GNU indirect "
15735 "functions may result in a segfault at runtime\n"));
15736 continue;
15737 }
15738
15739 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15740 }
15741 }
15742
15743 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15744 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15745 {
15746 /* Fill in the first entry in the global offset table.
15747 We use it to hold the link-time TOCbase. */
15748 bfd_put_64 (output_bfd,
15749 elf_gp (output_bfd) + TOC_BASE_OFF,
15750 htab->elf.sgot->contents);
15751
15752 /* Set .got entry size. */
15753 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15754 }
15755
15756 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15757 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15758 {
15759 /* Set .plt entry size. */
15760 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15761 = PLT_ENTRY_SIZE (htab);
15762 }
15763
15764 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15765 brlt ourselves if emitrelocations. */
15766 if (htab->brlt != NULL
15767 && htab->brlt->reloc_count != 0
15768 && !_bfd_elf_link_output_relocs (output_bfd,
15769 htab->brlt,
15770 elf_section_data (htab->brlt)->rela.hdr,
15771 elf_section_data (htab->brlt)->relocs,
15772 NULL))
15773 return FALSE;
15774
15775 if (htab->glink != NULL
15776 && htab->glink->reloc_count != 0
15777 && !_bfd_elf_link_output_relocs (output_bfd,
15778 htab->glink,
15779 elf_section_data (htab->glink)->rela.hdr,
15780 elf_section_data (htab->glink)->relocs,
15781 NULL))
15782 return FALSE;
15783
15784 if (htab->glink_eh_frame != NULL
15785 && htab->glink_eh_frame->size != 0)
15786 {
15787 bfd_vma val;
15788 bfd_byte *p;
15789 struct map_stub *group;
15790 size_t align = 4;
15791
15792 p = htab->glink_eh_frame->contents;
15793 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15794
15795 for (group = htab->group; group != NULL; group = group->next)
15796 if (group->stub_sec != NULL)
15797 {
15798 /* Offset to stub section. */
15799 val = (group->stub_sec->output_section->vma
15800 + group->stub_sec->output_offset);
15801 val -= (htab->glink_eh_frame->output_section->vma
15802 + htab->glink_eh_frame->output_offset
15803 + (p + 8 - htab->glink_eh_frame->contents));
15804 if (val + 0x80000000 > 0xffffffff)
15805 {
15806 info->callbacks->einfo
15807 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15808 group->stub_sec->name);
15809 return FALSE;
15810 }
15811 bfd_put_32 (dynobj, val, p + 8);
15812 p += stub_eh_frame_size (group, align);
15813 }
15814 if (htab->glink != NULL && htab->glink->size != 0)
15815 {
15816 /* Offset to .glink. */
15817 val = (htab->glink->output_section->vma
15818 + htab->glink->output_offset
15819 + 8);
15820 val -= (htab->glink_eh_frame->output_section->vma
15821 + htab->glink_eh_frame->output_offset
15822 + (p + 8 - htab->glink_eh_frame->contents));
15823 if (val + 0x80000000 > 0xffffffff)
15824 {
15825 info->callbacks->einfo
15826 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15827 htab->glink->name);
15828 return FALSE;
15829 }
15830 bfd_put_32 (dynobj, val, p + 8);
15831 p += (24 + align - 1) & -align;
15832 }
15833
15834 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15835 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15836 htab->glink_eh_frame,
15837 htab->glink_eh_frame->contents))
15838 return FALSE;
15839 }
15840
15841 /* We need to handle writing out multiple GOT sections ourselves,
15842 since we didn't add them to DYNOBJ. We know dynobj is the first
15843 bfd. */
15844 while ((dynobj = dynobj->link.next) != NULL)
15845 {
15846 asection *s;
15847
15848 if (!is_ppc64_elf (dynobj))
15849 continue;
15850
15851 s = ppc64_elf_tdata (dynobj)->got;
15852 if (s != NULL
15853 && s->size != 0
15854 && s->output_section != bfd_abs_section_ptr
15855 && !bfd_set_section_contents (output_bfd, s->output_section,
15856 s->contents, s->output_offset,
15857 s->size))
15858 return FALSE;
15859 s = ppc64_elf_tdata (dynobj)->relgot;
15860 if (s != NULL
15861 && s->size != 0
15862 && s->output_section != bfd_abs_section_ptr
15863 && !bfd_set_section_contents (output_bfd, s->output_section,
15864 s->contents, s->output_offset,
15865 s->size))
15866 return FALSE;
15867 }
15868
15869 return TRUE;
15870}
15871
15872#include "elf64-target.h"
15873
15874/* FreeBSD support */
15875
15876#undef TARGET_LITTLE_SYM
15877#undef TARGET_LITTLE_NAME
15878
15879#undef TARGET_BIG_SYM
15880#define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15881#undef TARGET_BIG_NAME
15882#define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15883
15884#undef ELF_OSABI
15885#define ELF_OSABI ELFOSABI_FREEBSD
15886
15887#undef elf64_bed
15888#define elf64_bed elf64_powerpc_fbsd_bed
15889
15890#include "elf64-target.h"
GDB Binutils - Deliverables
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