1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2018 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.
7 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
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 */
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
69 #define elf_info_to_howto ppc64_elf_info_to_howto
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_want_dynrelro 1
77 #define elf_backend_can_gc_sections 1
78 #define elf_backend_can_refcount 1
79 #define elf_backend_rela_normal 1
80 #define elf_backend_dtrel_excludes_plt 1
81 #define elf_backend_default_execstack 0
83 #define bfd_elf64_mkobject ppc64_elf_mkobject
84 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
85 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
86 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
87 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
88 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
89 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
90 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
91 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
92 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
94 #define elf_backend_object_p ppc64_elf_object_p
95 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
96 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
97 #define elf_backend_write_core_note ppc64_elf_write_core_note
98 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
99 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
100 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
101 #define elf_backend_check_directives ppc64_elf_before_check_relocs
102 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
103 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
104 #define elf_backend_check_relocs ppc64_elf_check_relocs
105 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
106 #define elf_backend_gc_keep ppc64_elf_gc_keep
107 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
108 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
109 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
110 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
111 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
112 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
113 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
114 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
115 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
116 #define elf_backend_action_discarded ppc64_elf_action_discarded
117 #define elf_backend_relocate_section ppc64_elf_relocate_section
118 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
119 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
120 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
121 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
122 #define elf_backend_special_sections ppc64_elf_special_sections
123 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
124 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
125 #define elf_backend_get_reloc_section bfd_get_section_by_name
127 /* The name of the dynamic interpreter. This is put in the .interp
129 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
131 /* The size in bytes of an entry in the procedure linkage table. */
132 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
133 #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8)
135 /* The initial size of the plt reserved for the dynamic linker. */
136 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
138 /* Offsets to some stack save slots. */
140 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
141 /* This one is dodgy. ELFv2 does not have a linker word, so use the
142 CR save slot. Used only by optimised __tls_get_addr call stub,
143 relying on __tls_get_addr_opt not saving CR.. */
144 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
146 /* TOC base pointers offset from start of TOC. */
147 #define TOC_BASE_OFF 0x8000
148 /* TOC base alignment. */
149 #define TOC_BASE_ALIGN 256
151 /* Offset of tp and dtp pointers from start of TLS block. */
152 #define TP_OFFSET 0x7000
153 #define DTP_OFFSET 0x8000
155 /* .plt call stub instructions. The normal stub is like this, but
156 sometimes the .plt entry crosses a 64k boundary and we need to
157 insert an addi to adjust r11. */
158 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
159 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
160 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
161 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
162 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
163 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
164 #define BCTR 0x4e800420 /* bctr */
166 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
167 #define ADDI_R12_R11 0x398b0000 /* addi %r12,%r11,off@l */
168 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
169 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
170 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
172 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
173 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
174 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
175 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
176 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
177 #define BNECTR 0x4ca20420 /* bnectr+ */
178 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
180 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
181 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
182 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
184 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
185 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
186 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
188 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
189 #define LIS_R12 0x3d800000 /* lis %r12,xxx@ha */
190 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
191 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
192 #define ADDIS_R12_R11 0x3d8b0000 /* addis %r12,%r11,xxx@ha */
193 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
194 #define ORIS_R12_R12_0 0x658c0000 /* oris %r12,%r12,xxx@hi */
195 #define ORI_R12_R12_0 0x618c0000 /* ori %r12,%r12,xxx@l */
196 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
197 #define SLDI_R12_R12_32 0x799c07c6 /* sldi %r12,%r12,32 */
198 #define LDX_R12_R11_R12 0x7d8b602a /* ldx %r12,%r11,%r12 */
199 #define ADD_R12_R11_R12 0x7d8b6214 /* add %r12,%r11,%r12 */
201 /* __glink_PLTresolve stub instructions. We enter with the index in R0. */
202 #define GLINK_PLTRESOLVE_SIZE(htab) \
203 (8u + (htab->opd_abi ? 11 * 4 : 14 * 4))
207 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
208 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
210 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
211 /* ld %2,(0b-1b)(%11) */
212 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
213 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
219 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
220 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
221 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
222 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
223 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
226 #define NOP 0x60000000
228 /* Some other nops. */
229 #define CROR_151515 0x4def7b82
230 #define CROR_313131 0x4ffffb82
232 /* .glink entries for the first 32k functions are two instructions. */
233 #define LI_R0_0 0x38000000 /* li %r0,0 */
234 #define B_DOT 0x48000000 /* b . */
236 /* After that, we need two instructions to load the index, followed by
238 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
239 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
241 /* Instructions used by the save and restore reg functions. */
242 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
243 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
244 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
245 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
246 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
247 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
248 #define LI_R12_0 0x39800000 /* li %r12,0 */
249 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
250 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
251 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
252 #define BLR 0x4e800020 /* blr */
254 /* Since .opd is an array of descriptors and each entry will end up
255 with identical R_PPC64_RELATIVE relocs, there is really no need to
256 propagate .opd relocs; The dynamic linker should be taught to
257 relocate .opd without reloc entries. */
258 #ifndef NO_OPD_RELOCS
259 #define NO_OPD_RELOCS 0
263 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
267 abiversion (bfd *abfd)
269 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
273 set_abiversion (bfd *abfd, int ver)
275 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
276 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
279 /* Relocation HOWTO's. */
280 /* Like other ELF RELA targets that don't apply multiple
281 field-altering relocations to the same localation, src_mask is
282 always zero and pcrel_offset is the same as pc_relative.
283 PowerPC can always use a zero bitpos, even when the field is not at
284 the LSB. For example, a REL24 could use rightshift=2, bisize=24
285 and bitpos=2 which matches the ABI description, or as we do here,
286 rightshift=0, bitsize=26 and bitpos=0. */
287 #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \
288 complain, special_func) \
289 HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \
290 complain_overflow_ ## complain, special_func, \
291 #type, FALSE, 0, mask, pc_relative)
293 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
295 static reloc_howto_type ppc64_elf_howto_raw[] =
297 /* This reloc does nothing. */
298 HOW (R_PPC64_NONE, 3, 0, 0, 0, FALSE, dont,
299 bfd_elf_generic_reloc),
301 /* A standard 32 bit relocation. */
302 HOW (R_PPC64_ADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield,
303 bfd_elf_generic_reloc),
305 /* An absolute 26 bit branch; the lower two bits must be zero.
306 FIXME: we don't check that, we just clear them. */
307 HOW (R_PPC64_ADDR24, 2, 26, 0x03fffffc, 0, FALSE, bitfield,
308 bfd_elf_generic_reloc),
310 /* A standard 16 bit relocation. */
311 HOW (R_PPC64_ADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
312 bfd_elf_generic_reloc),
314 /* A 16 bit relocation without overflow. */
315 HOW (R_PPC64_ADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont,
316 bfd_elf_generic_reloc),
318 /* Bits 16-31 of an address. */
319 HOW (R_PPC64_ADDR16_HI, 1, 16, 0xffff, 16, FALSE, signed,
320 bfd_elf_generic_reloc),
322 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
323 bits, treated as a signed number, is negative. */
324 HOW (R_PPC64_ADDR16_HA, 1, 16, 0xffff, 16, FALSE, signed,
327 /* An absolute 16 bit branch; the lower two bits must be zero.
328 FIXME: we don't check that, we just clear them. */
329 HOW (R_PPC64_ADDR14, 2, 16, 0x0000fffc, 0, FALSE, signed,
330 ppc64_elf_branch_reloc),
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is expected to be taken. The lower two
334 bits must be zero. */
335 HOW (R_PPC64_ADDR14_BRTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed,
336 ppc64_elf_brtaken_reloc),
338 /* An absolute 16 bit branch, for which bit 10 should be set to
339 indicate that the branch is not expected to be taken. The lower
340 two bits must be zero. */
341 HOW (R_PPC64_ADDR14_BRNTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed,
342 ppc64_elf_brtaken_reloc),
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOW (R_PPC64_REL24, 2, 26, 0x03fffffc, 0, TRUE, signed,
346 ppc64_elf_branch_reloc),
348 /* A variant of R_PPC64_REL24, used when r2 is not the toc pointer. */
349 HOW (R_PPC64_REL24_NOTOC, 2, 26, 0x03fffffc, 0, TRUE, signed,
350 ppc64_elf_branch_reloc),
352 /* A relative 16 bit branch; the lower two bits must be zero. */
353 HOW (R_PPC64_REL14, 2, 16, 0x0000fffc, 0, TRUE, signed,
354 ppc64_elf_branch_reloc),
356 /* A relative 16 bit branch. Bit 10 should be set to indicate that
357 the branch is expected to be taken. The lower two bits must be
359 HOW (R_PPC64_REL14_BRTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed,
360 ppc64_elf_brtaken_reloc),
362 /* A relative 16 bit branch. Bit 10 should be set to indicate that
363 the branch is not expected to be taken. The lower two bits must
365 HOW (R_PPC64_REL14_BRNTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed,
366 ppc64_elf_brtaken_reloc),
368 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
370 HOW (R_PPC64_GOT16, 1, 16, 0xffff, 0, FALSE, signed,
371 ppc64_elf_unhandled_reloc),
373 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
375 HOW (R_PPC64_GOT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
376 ppc64_elf_unhandled_reloc),
378 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
380 HOW (R_PPC64_GOT16_HI, 1, 16, 0xffff, 16, FALSE, signed,
381 ppc64_elf_unhandled_reloc),
383 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
385 HOW (R_PPC64_GOT16_HA, 1, 16, 0xffff, 16, FALSE, signed,
386 ppc64_elf_unhandled_reloc),
388 /* This is used only by the dynamic linker. The symbol should exist
389 both in the object being run and in some shared library. The
390 dynamic linker copies the data addressed by the symbol from the
391 shared library into the object, because the object being
392 run has to have the data at some particular address. */
393 HOW (R_PPC64_COPY, 0, 0, 0, 0, FALSE, dont,
394 ppc64_elf_unhandled_reloc),
396 /* Like R_PPC64_ADDR64, but used when setting global offset table
398 HOW (R_PPC64_GLOB_DAT, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
399 ppc64_elf_unhandled_reloc),
401 /* Created by the link editor. Marks a procedure linkage table
402 entry for a symbol. */
403 HOW (R_PPC64_JMP_SLOT, 0, 0, 0, 0, FALSE, dont,
404 ppc64_elf_unhandled_reloc),
406 /* Used only by the dynamic linker. When the object is run, this
407 doubleword64 is set to the load address of the object, plus the
409 HOW (R_PPC64_RELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
410 bfd_elf_generic_reloc),
412 /* Like R_PPC64_ADDR32, but may be unaligned. */
413 HOW (R_PPC64_UADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield,
414 bfd_elf_generic_reloc),
416 /* Like R_PPC64_ADDR16, but may be unaligned. */
417 HOW (R_PPC64_UADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
418 bfd_elf_generic_reloc),
420 /* 32-bit PC relative. */
421 HOW (R_PPC64_REL32, 2, 32, 0xffffffff, 0, TRUE, signed,
422 bfd_elf_generic_reloc),
424 /* 32-bit relocation to the symbol's procedure linkage table. */
425 HOW (R_PPC64_PLT32, 2, 32, 0xffffffff, 0, FALSE, bitfield,
426 ppc64_elf_unhandled_reloc),
428 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
429 FIXME: R_PPC64_PLTREL32 not supported. */
430 HOW (R_PPC64_PLTREL32, 2, 32, 0xffffffff, 0, TRUE, signed,
431 ppc64_elf_unhandled_reloc),
433 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
435 HOW (R_PPC64_PLT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
436 ppc64_elf_unhandled_reloc),
438 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
440 HOW (R_PPC64_PLT16_HI, 1, 16, 0xffff, 16, FALSE, signed,
441 ppc64_elf_unhandled_reloc),
443 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
445 HOW (R_PPC64_PLT16_HA, 1, 16, 0xffff, 16, FALSE, signed,
446 ppc64_elf_unhandled_reloc),
448 /* 16-bit section relative relocation. */
449 HOW (R_PPC64_SECTOFF, 1, 16, 0xffff, 0, FALSE, signed,
450 ppc64_elf_sectoff_reloc),
452 /* Like R_PPC64_SECTOFF, but no overflow warning. */
453 HOW (R_PPC64_SECTOFF_LO, 1, 16, 0xffff, 0, FALSE, dont,
454 ppc64_elf_sectoff_reloc),
456 /* 16-bit upper half section relative relocation. */
457 HOW (R_PPC64_SECTOFF_HI, 1, 16, 0xffff, 16, FALSE, signed,
458 ppc64_elf_sectoff_reloc),
460 /* 16-bit upper half adjusted section relative relocation. */
461 HOW (R_PPC64_SECTOFF_HA, 1, 16, 0xffff, 16, FALSE, signed,
462 ppc64_elf_sectoff_ha_reloc),
464 /* Like R_PPC64_REL24 without touching the two least significant bits. */
465 HOW (R_PPC64_REL30, 2, 30, 0xfffffffc, 2, TRUE, dont,
466 bfd_elf_generic_reloc),
468 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
470 /* A standard 64-bit relocation. */
471 HOW (R_PPC64_ADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
472 bfd_elf_generic_reloc),
474 /* The bits 32-47 of an address. */
475 HOW (R_PPC64_ADDR16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont,
476 bfd_elf_generic_reloc),
478 /* The bits 32-47 of an address, plus 1 if the contents of the low
479 16 bits, treated as a signed number, is negative. */
480 HOW (R_PPC64_ADDR16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont,
483 /* The bits 48-63 of an address. */
484 HOW (R_PPC64_ADDR16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont,
485 bfd_elf_generic_reloc),
487 /* The bits 48-63 of an address, plus 1 if the contents of the low
488 16 bits, treated as a signed number, is negative. */
489 HOW (R_PPC64_ADDR16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont,
492 /* Like ADDR64, but may be unaligned. */
493 HOW (R_PPC64_UADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
494 bfd_elf_generic_reloc),
496 /* 64-bit relative relocation. */
497 HOW (R_PPC64_REL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont,
498 bfd_elf_generic_reloc),
500 /* 64-bit relocation to the symbol's procedure linkage table. */
501 HOW (R_PPC64_PLT64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
502 ppc64_elf_unhandled_reloc),
504 /* 64-bit PC relative relocation to the symbol's procedure linkage
506 /* FIXME: R_PPC64_PLTREL64 not supported. */
507 HOW (R_PPC64_PLTREL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont,
508 ppc64_elf_unhandled_reloc),
510 /* 16 bit TOC-relative relocation. */
511 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
512 HOW (R_PPC64_TOC16, 1, 16, 0xffff, 0, FALSE, signed,
513 ppc64_elf_toc_reloc),
515 /* 16 bit TOC-relative relocation without overflow. */
516 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
517 HOW (R_PPC64_TOC16_LO, 1, 16, 0xffff, 0, FALSE, dont,
518 ppc64_elf_toc_reloc),
520 /* 16 bit TOC-relative relocation, high 16 bits. */
521 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
522 HOW (R_PPC64_TOC16_HI, 1, 16, 0xffff, 16, FALSE, signed,
523 ppc64_elf_toc_reloc),
525 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
526 contents of the low 16 bits, treated as a signed number, is
528 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
529 HOW (R_PPC64_TOC16_HA, 1, 16, 0xffff, 16, FALSE, signed,
530 ppc64_elf_toc_ha_reloc),
532 /* 64-bit relocation; insert value of TOC base (.TOC.). */
533 /* R_PPC64_TOC 51 doubleword64 .TOC. */
534 HOW (R_PPC64_TOC, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
535 ppc64_elf_toc64_reloc),
537 /* Like R_PPC64_GOT16, but also informs the link editor that the
538 value to relocate may (!) refer to a PLT entry which the link
539 editor (a) may replace with the symbol value. If the link editor
540 is unable to fully resolve the symbol, it may (b) create a PLT
541 entry and store the address to the new PLT entry in the GOT.
542 This permits lazy resolution of function symbols at run time.
543 The link editor may also skip all of this and just (c) emit a
544 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
545 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
546 HOW (R_PPC64_PLTGOT16, 1, 16, 0xffff, 0, FALSE,signed,
547 ppc64_elf_unhandled_reloc),
549 /* Like R_PPC64_PLTGOT16, but without overflow. */
550 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
551 HOW (R_PPC64_PLTGOT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
552 ppc64_elf_unhandled_reloc),
554 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
555 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
556 HOW (R_PPC64_PLTGOT16_HI, 1, 16, 0xffff, 16, FALSE, signed,
557 ppc64_elf_unhandled_reloc),
559 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
560 1 if the contents of the low 16 bits, treated as a signed number,
562 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
563 HOW (R_PPC64_PLTGOT16_HA, 1, 16, 0xffff, 16, FALSE, signed,
564 ppc64_elf_unhandled_reloc),
566 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
567 HOW (R_PPC64_ADDR16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
568 bfd_elf_generic_reloc),
570 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
571 HOW (R_PPC64_ADDR16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
572 bfd_elf_generic_reloc),
574 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
575 HOW (R_PPC64_GOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
576 ppc64_elf_unhandled_reloc),
578 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
579 HOW (R_PPC64_GOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
580 ppc64_elf_unhandled_reloc),
582 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
583 HOW (R_PPC64_PLT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
584 ppc64_elf_unhandled_reloc),
586 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
587 HOW (R_PPC64_SECTOFF_DS, 1, 16, 0xfffc, 0, FALSE, signed,
588 ppc64_elf_sectoff_reloc),
590 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
591 HOW (R_PPC64_SECTOFF_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
592 ppc64_elf_sectoff_reloc),
594 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
595 HOW (R_PPC64_TOC16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
596 ppc64_elf_toc_reloc),
598 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
599 HOW (R_PPC64_TOC16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
600 ppc64_elf_toc_reloc),
602 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
603 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
604 HOW (R_PPC64_PLTGOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
605 ppc64_elf_unhandled_reloc),
607 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
608 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
609 HOW (R_PPC64_PLTGOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
610 ppc64_elf_unhandled_reloc),
612 /* Marker relocs for TLS. */
613 HOW (R_PPC64_TLS, 2, 32, 0, 0, FALSE, dont,
614 bfd_elf_generic_reloc),
616 HOW (R_PPC64_TLSGD, 2, 32, 0, 0, FALSE, dont,
617 bfd_elf_generic_reloc),
619 HOW (R_PPC64_TLSLD, 2, 32, 0, 0, FALSE, dont,
620 bfd_elf_generic_reloc),
622 /* Marker reloc for optimizing r2 save in prologue rather than on
623 each plt call stub. */
624 HOW (R_PPC64_TOCSAVE, 2, 32, 0, 0, FALSE, dont,
625 bfd_elf_generic_reloc),
627 /* Marker relocs on inline plt call instructions. */
628 HOW (R_PPC64_PLTSEQ, 2, 32, 0, 0, FALSE, dont,
629 bfd_elf_generic_reloc),
631 HOW (R_PPC64_PLTCALL, 2, 32, 0, 0, FALSE, dont,
632 bfd_elf_generic_reloc),
634 /* Computes the load module index of the load module that contains the
635 definition of its TLS sym. */
636 HOW (R_PPC64_DTPMOD64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
637 ppc64_elf_unhandled_reloc),
639 /* Computes a dtv-relative displacement, the difference between the value
640 of sym+add and the base address of the thread-local storage block that
641 contains the definition of sym, minus 0x8000. */
642 HOW (R_PPC64_DTPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
643 ppc64_elf_unhandled_reloc),
645 /* A 16 bit dtprel reloc. */
646 HOW (R_PPC64_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed,
647 ppc64_elf_unhandled_reloc),
649 /* Like DTPREL16, but no overflow. */
650 HOW (R_PPC64_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
651 ppc64_elf_unhandled_reloc),
653 /* Like DTPREL16_LO, but next higher group of 16 bits. */
654 HOW (R_PPC64_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed,
655 ppc64_elf_unhandled_reloc),
657 /* Like DTPREL16_HI, but adjust for low 16 bits. */
658 HOW (R_PPC64_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed,
659 ppc64_elf_unhandled_reloc),
661 /* Like DTPREL16_HI, but next higher group of 16 bits. */
662 HOW (R_PPC64_DTPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont,
663 ppc64_elf_unhandled_reloc),
665 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
666 HOW (R_PPC64_DTPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont,
667 ppc64_elf_unhandled_reloc),
669 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
670 HOW (R_PPC64_DTPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont,
671 ppc64_elf_unhandled_reloc),
673 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
674 HOW (R_PPC64_DTPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont,
675 ppc64_elf_unhandled_reloc),
677 /* Like DTPREL16, but for insns with a DS field. */
678 HOW (R_PPC64_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
679 ppc64_elf_unhandled_reloc),
681 /* Like DTPREL16_DS, but no overflow. */
682 HOW (R_PPC64_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
683 ppc64_elf_unhandled_reloc),
685 /* Computes a tp-relative displacement, the difference between the value of
686 sym+add and the value of the thread pointer (r13). */
687 HOW (R_PPC64_TPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
688 ppc64_elf_unhandled_reloc),
690 /* A 16 bit tprel reloc. */
691 HOW (R_PPC64_TPREL16, 1, 16, 0xffff, 0, FALSE, signed,
692 ppc64_elf_unhandled_reloc),
694 /* Like TPREL16, but no overflow. */
695 HOW (R_PPC64_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
696 ppc64_elf_unhandled_reloc),
698 /* Like TPREL16_LO, but next higher group of 16 bits. */
699 HOW (R_PPC64_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed,
700 ppc64_elf_unhandled_reloc),
702 /* Like TPREL16_HI, but adjust for low 16 bits. */
703 HOW (R_PPC64_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed,
704 ppc64_elf_unhandled_reloc),
706 /* Like TPREL16_HI, but next higher group of 16 bits. */
707 HOW (R_PPC64_TPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont,
708 ppc64_elf_unhandled_reloc),
710 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
711 HOW (R_PPC64_TPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont,
712 ppc64_elf_unhandled_reloc),
714 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
715 HOW (R_PPC64_TPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont,
716 ppc64_elf_unhandled_reloc),
718 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
719 HOW (R_PPC64_TPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont,
720 ppc64_elf_unhandled_reloc),
722 /* Like TPREL16, but for insns with a DS field. */
723 HOW (R_PPC64_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
724 ppc64_elf_unhandled_reloc),
726 /* Like TPREL16_DS, but no overflow. */
727 HOW (R_PPC64_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
728 ppc64_elf_unhandled_reloc),
730 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
731 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
732 to the first entry relative to the TOC base (r2). */
733 HOW (R_PPC64_GOT_TLSGD16, 1, 16, 0xffff, 0, FALSE, signed,
734 ppc64_elf_unhandled_reloc),
736 /* Like GOT_TLSGD16, but no overflow. */
737 HOW (R_PPC64_GOT_TLSGD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
738 ppc64_elf_unhandled_reloc),
740 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
741 HOW (R_PPC64_GOT_TLSGD16_HI, 1, 16, 0xffff, 16, FALSE, signed,
742 ppc64_elf_unhandled_reloc),
744 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
745 HOW (R_PPC64_GOT_TLSGD16_HA, 1, 16, 0xffff, 16, FALSE, signed,
746 ppc64_elf_unhandled_reloc),
748 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
749 with values (sym+add)@dtpmod and zero, and computes the offset to the
750 first entry relative to the TOC base (r2). */
751 HOW (R_PPC64_GOT_TLSLD16, 1, 16, 0xffff, 0, FALSE, signed,
752 ppc64_elf_unhandled_reloc),
754 /* Like GOT_TLSLD16, but no overflow. */
755 HOW (R_PPC64_GOT_TLSLD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
756 ppc64_elf_unhandled_reloc),
758 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
759 HOW (R_PPC64_GOT_TLSLD16_HI, 1, 16, 0xffff, 16, FALSE, signed,
760 ppc64_elf_unhandled_reloc),
762 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
763 HOW (R_PPC64_GOT_TLSLD16_HA, 1, 16, 0xffff, 16, FALSE, signed,
764 ppc64_elf_unhandled_reloc),
766 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
767 the offset to the entry relative to the TOC base (r2). */
768 HOW (R_PPC64_GOT_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
769 ppc64_elf_unhandled_reloc),
771 /* Like GOT_DTPREL16_DS, but no overflow. */
772 HOW (R_PPC64_GOT_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
773 ppc64_elf_unhandled_reloc),
775 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
776 HOW (R_PPC64_GOT_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed,
777 ppc64_elf_unhandled_reloc),
779 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
780 HOW (R_PPC64_GOT_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed,
781 ppc64_elf_unhandled_reloc),
783 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
784 offset to the entry relative to the TOC base (r2). */
785 HOW (R_PPC64_GOT_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed,
786 ppc64_elf_unhandled_reloc),
788 /* Like GOT_TPREL16_DS, but no overflow. */
789 HOW (R_PPC64_GOT_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont,
790 ppc64_elf_unhandled_reloc),
792 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
793 HOW (R_PPC64_GOT_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed,
794 ppc64_elf_unhandled_reloc),
796 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
797 HOW (R_PPC64_GOT_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed,
798 ppc64_elf_unhandled_reloc),
800 HOW (R_PPC64_JMP_IREL, 0, 0, 0, 0, FALSE, dont,
801 ppc64_elf_unhandled_reloc),
803 HOW (R_PPC64_IRELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
804 bfd_elf_generic_reloc),
806 /* A 16 bit relative relocation. */
807 HOW (R_PPC64_REL16, 1, 16, 0xffff, 0, TRUE, signed,
808 bfd_elf_generic_reloc),
810 /* A 16 bit relative relocation without overflow. */
811 HOW (R_PPC64_REL16_LO, 1, 16, 0xffff, 0, TRUE, dont,
812 bfd_elf_generic_reloc),
814 /* The high order 16 bits of a relative address. */
815 HOW (R_PPC64_REL16_HI, 1, 16, 0xffff, 16, TRUE, signed,
816 bfd_elf_generic_reloc),
818 /* The high order 16 bits of a relative address, plus 1 if the contents of
819 the low 16 bits, treated as a signed number, is negative. */
820 HOW (R_PPC64_REL16_HA, 1, 16, 0xffff, 16, TRUE, signed,
823 HOW (R_PPC64_REL16_HIGH, 1, 16, 0xffff, 16, TRUE, dont,
824 bfd_elf_generic_reloc),
826 HOW (R_PPC64_REL16_HIGHA, 1, 16, 0xffff, 16, TRUE, dont,
829 HOW (R_PPC64_REL16_HIGHER, 1, 16, 0xffff, 32, TRUE, dont,
830 bfd_elf_generic_reloc),
832 HOW (R_PPC64_REL16_HIGHERA, 1, 16, 0xffff, 32, TRUE, dont,
835 HOW (R_PPC64_REL16_HIGHEST, 1, 16, 0xffff, 48, TRUE, dont,
836 bfd_elf_generic_reloc),
838 HOW (R_PPC64_REL16_HIGHESTA, 1, 16, 0xffff, 48, TRUE, dont,
841 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
842 HOW (R_PPC64_REL16DX_HA, 2, 16, 0x1fffc1, 16, TRUE, signed,
845 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
846 HOW (R_PPC64_16DX_HA, 2, 16, 0x1fffc1, 16, FALSE, signed,
849 /* Like R_PPC64_ADDR16_HI, but no overflow. */
850 HOW (R_PPC64_ADDR16_HIGH, 1, 16, 0xffff, 16, FALSE, dont,
851 bfd_elf_generic_reloc),
853 /* Like R_PPC64_ADDR16_HA, but no overflow. */
854 HOW (R_PPC64_ADDR16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont,
857 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
858 HOW (R_PPC64_DTPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont,
859 ppc64_elf_unhandled_reloc),
861 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
862 HOW (R_PPC64_DTPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont,
863 ppc64_elf_unhandled_reloc),
865 /* Like R_PPC64_TPREL16_HI, but no overflow. */
866 HOW (R_PPC64_TPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont,
867 ppc64_elf_unhandled_reloc),
869 /* Like R_PPC64_TPREL16_HA, but no overflow. */
870 HOW (R_PPC64_TPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont,
871 ppc64_elf_unhandled_reloc),
873 /* Marker reloc on ELFv2 large-model function entry. */
874 HOW (R_PPC64_ENTRY, 2, 32, 0, 0, FALSE, dont,
875 bfd_elf_generic_reloc),
877 /* Like ADDR64, but use local entry point of function. */
878 HOW (R_PPC64_ADDR64_LOCAL, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont,
879 bfd_elf_generic_reloc),
881 /* GNU extension to record C++ vtable hierarchy. */
882 HOW (R_PPC64_GNU_VTINHERIT, 0, 0, 0, 0, FALSE, dont,
885 /* GNU extension to record C++ vtable member usage. */
886 HOW (R_PPC64_GNU_VTENTRY, 0, 0, 0, 0, FALSE, dont,
891 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
895 ppc_howto_init (void)
897 unsigned int i, type;
899 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
901 type = ppc64_elf_howto_raw[i].type;
902 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
903 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
907 static reloc_howto_type *
908 ppc64_elf_reloc_type_lookup (bfd *abfd,
909 bfd_reloc_code_real_type code)
911 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
913 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
914 /* Initialize howto table if needed. */
920 /* xgettext:c-format */
921 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd,
923 bfd_set_error (bfd_error_bad_value);
926 case BFD_RELOC_NONE: r = R_PPC64_NONE;
928 case BFD_RELOC_32: r = R_PPC64_ADDR32;
930 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
932 case BFD_RELOC_16: r = R_PPC64_ADDR16;
934 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
936 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
938 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
940 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
942 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
944 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
946 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
948 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
950 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
952 case BFD_RELOC_PPC64_REL24_NOTOC: r = R_PPC64_REL24_NOTOC;
954 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
956 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
958 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
960 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
962 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
964 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
966 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
968 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
970 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
972 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
974 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
976 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
978 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
980 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
982 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
984 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
986 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
988 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
990 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
992 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
994 case BFD_RELOC_64: r = R_PPC64_ADDR64;
996 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
998 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1000 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1002 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1004 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1006 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1008 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1010 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1012 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1014 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1016 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1018 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1020 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1022 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1024 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1026 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1028 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1030 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1032 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1034 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1036 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1038 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1040 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1042 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1044 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1046 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1048 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
1050 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
1052 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
1054 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
1056 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
1058 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
1060 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
1062 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
1064 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
1066 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
1068 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
1070 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
1072 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
1074 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
1076 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
1078 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
1080 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
1082 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
1084 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
1086 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
1088 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
1090 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
1092 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
1094 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
1096 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
1098 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
1100 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
1102 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
1104 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
1106 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
1108 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
1110 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
1112 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
1114 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
1116 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
1118 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
1120 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
1122 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
1124 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
1126 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
1128 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
1130 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
1132 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
1134 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
1136 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
1138 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
1140 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
1142 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
1144 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
1146 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
1148 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
1150 case BFD_RELOC_PPC64_REL16_HIGH: r = R_PPC64_REL16_HIGH;
1152 case BFD_RELOC_PPC64_REL16_HIGHA: r = R_PPC64_REL16_HIGHA;
1154 case BFD_RELOC_PPC64_REL16_HIGHER: r = R_PPC64_REL16_HIGHER;
1156 case BFD_RELOC_PPC64_REL16_HIGHERA: r = R_PPC64_REL16_HIGHERA;
1158 case BFD_RELOC_PPC64_REL16_HIGHEST: r = R_PPC64_REL16_HIGHEST;
1160 case BFD_RELOC_PPC64_REL16_HIGHESTA: r = R_PPC64_REL16_HIGHESTA;
1162 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
1164 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
1166 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
1168 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
1170 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
1172 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
1176 return ppc64_elf_howto_table[r];
1179 static reloc_howto_type *
1180 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1185 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
1186 if (ppc64_elf_howto_raw[i].name != NULL
1187 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
1188 return &ppc64_elf_howto_raw[i];
1193 /* Set the howto pointer for a PowerPC ELF reloc. */
1196 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
1197 Elf_Internal_Rela *dst)
1201 /* Initialize howto table if needed. */
1202 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1205 type = ELF64_R_TYPE (dst->r_info);
1206 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
1208 /* xgettext:c-format */
1209 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1211 bfd_set_error (bfd_error_bad_value);
1214 cache_ptr->howto = ppc64_elf_howto_table[type];
1215 if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL)
1217 /* xgettext:c-format */
1218 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1220 bfd_set_error (bfd_error_bad_value);
1227 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
1229 static bfd_reloc_status_type
1230 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1231 void *data, asection *input_section,
1232 bfd *output_bfd, char **error_message)
1234 enum elf_ppc64_reloc_type r_type;
1236 bfd_size_type octets;
1239 /* If this is a relocatable link (output_bfd test tells us), just
1240 call the generic function. Any adjustment will be done at final
1242 if (output_bfd != NULL)
1243 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1244 input_section, output_bfd, error_message);
1246 /* Adjust the addend for sign extension of the low 16 bits.
1247 We won't actually be using the low 16 bits, so trashing them
1249 reloc_entry->addend += 0x8000;
1250 r_type = reloc_entry->howto->type;
1251 if (r_type != R_PPC64_REL16DX_HA)
1252 return bfd_reloc_continue;
1255 if (!bfd_is_com_section (symbol->section))
1256 value = symbol->value;
1257 value += (reloc_entry->addend
1258 + symbol->section->output_offset
1259 + symbol->section->output_section->vma);
1260 value -= (reloc_entry->address
1261 + input_section->output_offset
1262 + input_section->output_section->vma);
1263 value = (bfd_signed_vma) value >> 16;
1265 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1266 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
1268 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
1269 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
1270 if (value + 0x8000 > 0xffff)
1271 return bfd_reloc_overflow;
1272 return bfd_reloc_ok;
1275 static bfd_reloc_status_type
1276 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1277 void *data, asection *input_section,
1278 bfd *output_bfd, char **error_message)
1280 if (output_bfd != NULL)
1281 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1282 input_section, output_bfd, error_message);
1284 if (strcmp (symbol->section->name, ".opd") == 0
1285 && (symbol->section->owner->flags & DYNAMIC) == 0)
1287 bfd_vma dest = opd_entry_value (symbol->section,
1288 symbol->value + reloc_entry->addend,
1290 if (dest != (bfd_vma) -1)
1291 reloc_entry->addend = dest - (symbol->value
1292 + symbol->section->output_section->vma
1293 + symbol->section->output_offset);
1297 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
1299 if (symbol->section->owner != abfd
1300 && symbol->section->owner != NULL
1301 && abiversion (symbol->section->owner) >= 2)
1305 for (i = 0; i < symbol->section->owner->symcount; ++i)
1307 asymbol *symdef = symbol->section->owner->outsymbols[i];
1309 if (strcmp (symdef->name, symbol->name) == 0)
1311 elfsym = (elf_symbol_type *) symdef;
1317 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
1319 return bfd_reloc_continue;
1322 static bfd_reloc_status_type
1323 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1324 void *data, asection *input_section,
1325 bfd *output_bfd, char **error_message)
1328 enum elf_ppc64_reloc_type r_type;
1329 bfd_size_type octets;
1330 /* Assume 'at' branch hints. */
1331 bfd_boolean is_isa_v2 = TRUE;
1333 /* If this is a relocatable link (output_bfd test tells us), just
1334 call the generic function. Any adjustment will be done at final
1336 if (output_bfd != NULL)
1337 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1338 input_section, output_bfd, error_message);
1340 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1341 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
1342 insn &= ~(0x01 << 21);
1343 r_type = reloc_entry->howto->type;
1344 if (r_type == R_PPC64_ADDR14_BRTAKEN
1345 || r_type == R_PPC64_REL14_BRTAKEN)
1346 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
1350 /* Set 'a' bit. This is 0b00010 in BO field for branch
1351 on CR(BI) insns (BO == 001at or 011at), and 0b01000
1352 for branch on CTR insns (BO == 1a00t or 1a01t). */
1353 if ((insn & (0x14 << 21)) == (0x04 << 21))
1355 else if ((insn & (0x14 << 21)) == (0x10 << 21))
1365 if (!bfd_is_com_section (symbol->section))
1366 target = symbol->value;
1367 target += symbol->section->output_section->vma;
1368 target += symbol->section->output_offset;
1369 target += reloc_entry->addend;
1371 from = (reloc_entry->address
1372 + input_section->output_offset
1373 + input_section->output_section->vma);
1375 /* Invert 'y' bit if not the default. */
1376 if ((bfd_signed_vma) (target - from) < 0)
1379 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
1381 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
1382 input_section, output_bfd, error_message);
1385 static bfd_reloc_status_type
1386 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1387 void *data, asection *input_section,
1388 bfd *output_bfd, char **error_message)
1390 /* If this is a relocatable link (output_bfd test tells us), just
1391 call the generic function. Any adjustment will be done at final
1393 if (output_bfd != NULL)
1394 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1395 input_section, output_bfd, error_message);
1397 /* Subtract the symbol section base address. */
1398 reloc_entry->addend -= symbol->section->output_section->vma;
1399 return bfd_reloc_continue;
1402 static bfd_reloc_status_type
1403 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1404 void *data, asection *input_section,
1405 bfd *output_bfd, char **error_message)
1407 /* If this is a relocatable link (output_bfd test tells us), just
1408 call the generic function. Any adjustment will be done at final
1410 if (output_bfd != NULL)
1411 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1412 input_section, output_bfd, error_message);
1414 /* Subtract the symbol section base address. */
1415 reloc_entry->addend -= symbol->section->output_section->vma;
1417 /* Adjust the addend for sign extension of the low 16 bits. */
1418 reloc_entry->addend += 0x8000;
1419 return bfd_reloc_continue;
1422 static bfd_reloc_status_type
1423 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1424 void *data, asection *input_section,
1425 bfd *output_bfd, char **error_message)
1429 /* If this is a relocatable link (output_bfd test tells us), just
1430 call the generic function. Any adjustment will be done at final
1432 if (output_bfd != NULL)
1433 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1434 input_section, output_bfd, error_message);
1436 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1438 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
1440 /* Subtract the TOC base address. */
1441 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1442 return bfd_reloc_continue;
1445 static bfd_reloc_status_type
1446 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1447 void *data, asection *input_section,
1448 bfd *output_bfd, char **error_message)
1452 /* If this is a relocatable link (output_bfd test tells us), just
1453 call the generic function. Any adjustment will be done at final
1455 if (output_bfd != NULL)
1456 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1457 input_section, output_bfd, error_message);
1459 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1461 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
1463 /* Subtract the TOC base address. */
1464 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
1466 /* Adjust the addend for sign extension of the low 16 bits. */
1467 reloc_entry->addend += 0x8000;
1468 return bfd_reloc_continue;
1471 static bfd_reloc_status_type
1472 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1473 void *data, asection *input_section,
1474 bfd *output_bfd, char **error_message)
1477 bfd_size_type octets;
1479 /* If this is a relocatable link (output_bfd test tells us), just
1480 call the generic function. Any adjustment will be done at final
1482 if (output_bfd != NULL)
1483 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1484 input_section, output_bfd, error_message);
1486 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
1488 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
1490 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
1491 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
1492 return bfd_reloc_ok;
1495 static bfd_reloc_status_type
1496 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1497 void *data, asection *input_section,
1498 bfd *output_bfd, char **error_message)
1500 /* If this is a relocatable link (output_bfd test tells us), just
1501 call the generic function. Any adjustment will be done at final
1503 if (output_bfd != NULL)
1504 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1505 input_section, output_bfd, error_message);
1507 if (error_message != NULL)
1509 static char buf[60];
1510 sprintf (buf, "generic linker can't handle %s",
1511 reloc_entry->howto->name);
1512 *error_message = buf;
1514 return bfd_reloc_dangerous;
1517 /* Track GOT entries needed for a given symbol. We might need more
1518 than one got entry per symbol. */
1521 struct got_entry *next;
1523 /* The symbol addend that we'll be placing in the GOT. */
1526 /* Unlike other ELF targets, we use separate GOT entries for the same
1527 symbol referenced from different input files. This is to support
1528 automatic multiple TOC/GOT sections, where the TOC base can vary
1529 from one input file to another. After partitioning into TOC groups
1530 we merge entries within the group.
1532 Point to the BFD owning this GOT entry. */
1535 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
1536 TLS_TPREL or TLS_DTPREL for tls entries. */
1537 unsigned char tls_type;
1539 /* Non-zero if got.ent points to real entry. */
1540 unsigned char is_indirect;
1542 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
1545 bfd_signed_vma refcount;
1547 struct got_entry *ent;
1551 /* The same for PLT. */
1554 struct plt_entry *next;
1560 bfd_signed_vma refcount;
1565 struct ppc64_elf_obj_tdata
1567 struct elf_obj_tdata elf;
1569 /* Shortcuts to dynamic linker sections. */
1573 /* Used during garbage collection. We attach global symbols defined
1574 on removed .opd entries to this section so that the sym is removed. */
1575 asection *deleted_section;
1577 /* TLS local dynamic got entry handling. Support for multiple GOT
1578 sections means we potentially need one of these for each input bfd. */
1579 struct got_entry tlsld_got;
1583 /* A copy of relocs before they are modified for --emit-relocs. */
1584 Elf_Internal_Rela *relocs;
1586 /* Section contents. */
1590 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
1591 the reloc to be in the range -32768 to 32767. */
1592 unsigned int has_small_toc_reloc : 1;
1594 /* Set if toc/got ha relocs detected not using r2, or lo reloc
1595 instruction not one we handle. */
1596 unsigned int unexpected_toc_insn : 1;
1599 #define ppc64_elf_tdata(bfd) \
1600 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
1602 #define ppc64_tlsld_got(bfd) \
1603 (&ppc64_elf_tdata (bfd)->tlsld_got)
1605 #define is_ppc64_elf(bfd) \
1606 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1607 && elf_object_id (bfd) == PPC64_ELF_DATA)
1609 /* Override the generic function because we store some extras. */
1612 ppc64_elf_mkobject (bfd *abfd)
1614 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
1618 /* Fix bad default arch selected for a 64 bit input bfd when the
1619 default is 32 bit. Also select arch based on apuinfo. */
1622 ppc64_elf_object_p (bfd *abfd)
1624 if (!abfd->arch_info->the_default)
1627 if (abfd->arch_info->bits_per_word == 32)
1629 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1631 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
1633 /* Relies on arch after 32 bit default being 64 bit default. */
1634 abfd->arch_info = abfd->arch_info->next;
1635 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
1638 return _bfd_elf_ppc_set_arch (abfd);
1641 /* Support for core dump NOTE sections. */
1644 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1646 size_t offset, size;
1648 if (note->descsz != 504)
1652 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
1655 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
1661 /* Make a ".reg/999" section. */
1662 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1663 size, note->descpos + offset);
1667 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1669 if (note->descsz != 136)
1672 elf_tdata (abfd)->core->pid
1673 = bfd_get_32 (abfd, note->descdata + 24);
1674 elf_tdata (abfd)->core->program
1675 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
1676 elf_tdata (abfd)->core->command
1677 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
1683 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
1693 char data[136] ATTRIBUTE_NONSTRING;
1696 va_start (ap, note_type);
1697 memset (data, 0, sizeof (data));
1698 strncpy (data + 40, va_arg (ap, const char *), 16);
1699 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1701 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
1702 -Wstringop-truncation:
1703 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
1705 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
1707 strncpy (data + 56, va_arg (ap, const char *), 80);
1708 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1712 return elfcore_write_note (abfd, buf, bufsiz,
1713 "CORE", note_type, data, sizeof (data));
1724 va_start (ap, note_type);
1725 memset (data, 0, 112);
1726 pid = va_arg (ap, long);
1727 bfd_put_32 (abfd, pid, data + 32);
1728 cursig = va_arg (ap, int);
1729 bfd_put_16 (abfd, cursig, data + 12);
1730 greg = va_arg (ap, const void *);
1731 memcpy (data + 112, greg, 384);
1732 memset (data + 496, 0, 8);
1734 return elfcore_write_note (abfd, buf, bufsiz,
1735 "CORE", note_type, data, sizeof (data));
1740 /* Add extra PPC sections. */
1742 static const struct bfd_elf_special_section ppc64_elf_special_sections[] =
1744 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
1745 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1746 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1747 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1748 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1749 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1750 { NULL, 0, 0, 0, 0 }
1753 enum _ppc64_sec_type {
1759 struct _ppc64_elf_section_data
1761 struct bfd_elf_section_data elf;
1765 /* An array with one entry for each opd function descriptor,
1766 and some spares since opd entries may be either 16 or 24 bytes. */
1767 #define OPD_NDX(OFF) ((OFF) >> 4)
1768 struct _opd_sec_data
1770 /* Points to the function code section for local opd entries. */
1771 asection **func_sec;
1773 /* After editing .opd, adjust references to opd local syms. */
1777 /* An array for toc sections, indexed by offset/8. */
1778 struct _toc_sec_data
1780 /* Specifies the relocation symbol index used at a given toc offset. */
1783 /* And the relocation addend. */
1788 enum _ppc64_sec_type sec_type:2;
1790 /* Flag set when small branches are detected. Used to
1791 select suitable defaults for the stub group size. */
1792 unsigned int has_14bit_branch:1;
1794 /* Flag set when PLTCALL relocs are detected. */
1795 unsigned int has_pltcall:1;
1798 #define ppc64_elf_section_data(sec) \
1799 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
1802 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
1804 if (!sec->used_by_bfd)
1806 struct _ppc64_elf_section_data *sdata;
1807 bfd_size_type amt = sizeof (*sdata);
1809 sdata = bfd_zalloc (abfd, amt);
1812 sec->used_by_bfd = sdata;
1815 return _bfd_elf_new_section_hook (abfd, sec);
1818 static struct _opd_sec_data *
1819 get_opd_info (asection * sec)
1822 && ppc64_elf_section_data (sec) != NULL
1823 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
1824 return &ppc64_elf_section_data (sec)->u.opd;
1828 /* Parameters for the qsort hook. */
1829 static bfd_boolean synthetic_relocatable;
1830 static asection *synthetic_opd;
1832 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
1835 compare_symbols (const void *ap, const void *bp)
1837 const asymbol *a = *(const asymbol **) ap;
1838 const asymbol *b = *(const asymbol **) bp;
1840 /* Section symbols first. */
1841 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
1843 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
1846 /* then .opd symbols. */
1847 if (synthetic_opd != NULL)
1849 if (strcmp (a->section->name, ".opd") == 0
1850 && strcmp (b->section->name, ".opd") != 0)
1852 if (strcmp (a->section->name, ".opd") != 0
1853 && strcmp (b->section->name, ".opd") == 0)
1857 /* then other code symbols. */
1858 if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
1859 == (SEC_CODE | SEC_ALLOC))
1860 && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
1861 != (SEC_CODE | SEC_ALLOC)))
1864 if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
1865 != (SEC_CODE | SEC_ALLOC))
1866 && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
1867 == (SEC_CODE | SEC_ALLOC)))
1870 if (synthetic_relocatable)
1872 if (a->section->id < b->section->id)
1875 if (a->section->id > b->section->id)
1879 if (a->value + a->section->vma < b->value + b->section->vma)
1882 if (a->value + a->section->vma > b->value + b->section->vma)
1885 /* For syms with the same value, prefer strong dynamic global function
1886 syms over other syms. */
1887 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
1890 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
1893 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
1896 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
1899 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
1902 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
1905 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
1908 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
1914 /* Search SYMS for a symbol of the given VALUE. */
1917 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
1921 if (id == (unsigned) -1)
1925 mid = (lo + hi) >> 1;
1926 if (syms[mid]->value + syms[mid]->section->vma < value)
1928 else if (syms[mid]->value + syms[mid]->section->vma > value)
1938 mid = (lo + hi) >> 1;
1939 if (syms[mid]->section->id < id)
1941 else if (syms[mid]->section->id > id)
1943 else if (syms[mid]->value < value)
1945 else if (syms[mid]->value > value)
1955 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
1957 bfd_vma vma = *(bfd_vma *) ptr;
1958 return ((section->flags & SEC_ALLOC) != 0
1959 && section->vma <= vma
1960 && vma < section->vma + section->size);
1963 /* Create synthetic symbols, effectively restoring "dot-symbol" function
1964 entry syms. Also generate @plt symbols for the glink branch table.
1965 Returns count of synthetic symbols in RET or -1 on error. */
1968 ppc64_elf_get_synthetic_symtab (bfd *abfd,
1969 long static_count, asymbol **static_syms,
1970 long dyn_count, asymbol **dyn_syms,
1976 size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend;
1977 asection *opd = NULL;
1978 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
1980 int abi = abiversion (abfd);
1986 opd = bfd_get_section_by_name (abfd, ".opd");
1987 if (opd == NULL && abi == 1)
1999 symcount = static_count;
2001 symcount += dyn_count;
2005 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2009 if (!relocatable && static_count != 0 && dyn_count != 0)
2011 /* Use both symbol tables. */
2012 memcpy (syms, static_syms, static_count * sizeof (*syms));
2013 memcpy (syms + static_count, dyn_syms,
2014 (dyn_count + 1) * sizeof (*syms));
2016 else if (!relocatable && static_count == 0)
2017 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2019 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2021 /* Trim uninteresting symbols. Interesting symbols are section,
2022 function, and notype symbols. */
2023 for (i = 0, j = 0; i < symcount; ++i)
2024 if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL
2025 | BSF_RELC | BSF_SRELC)) == 0)
2026 syms[j++] = syms[i];
2029 synthetic_relocatable = relocatable;
2030 synthetic_opd = opd;
2031 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2033 if (!relocatable && symcount > 1)
2035 /* Trim duplicate syms, since we may have merged the normal
2036 and dynamic symbols. Actually, we only care about syms
2037 that have different values, so trim any with the same
2038 value. Don't consider ifunc and ifunc resolver symbols
2039 duplicates however, because GDB wants to know whether a
2040 text symbol is an ifunc resolver. */
2041 for (i = 1, j = 1; i < symcount; ++i)
2043 const asymbol *s0 = syms[i - 1];
2044 const asymbol *s1 = syms[i];
2046 if ((s0->value + s0->section->vma
2047 != s1->value + s1->section->vma)
2048 || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION)
2049 != (s1->flags & BSF_GNU_INDIRECT_FUNCTION)))
2050 syms[j++] = syms[i];
2056 /* Note that here and in compare_symbols we can't compare opd and
2057 sym->section directly. With separate debug info files, the
2058 symbols will be extracted from the debug file while abfd passed
2059 to this function is the real binary. */
2060 if (strcmp (syms[i]->section->name, ".opd") == 0)
2064 for (; i < symcount; ++i)
2065 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
2066 | SEC_THREAD_LOCAL))
2067 != (SEC_CODE | SEC_ALLOC))
2068 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2072 for (; i < symcount; ++i)
2073 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2077 for (; i < symcount; ++i)
2078 if (strcmp (syms[i]->section->name, ".opd") != 0)
2082 for (; i < symcount; ++i)
2083 if (((syms[i]->section->flags
2084 & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)))
2085 != (SEC_CODE | SEC_ALLOC))
2093 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2098 if (opdsymend == secsymend)
2101 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2102 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2106 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2113 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2117 while (r < opd->relocation + relcount
2118 && r->address < syms[i]->value + opd->vma)
2121 if (r == opd->relocation + relcount)
2124 if (r->address != syms[i]->value + opd->vma)
2127 if (r->howto->type != R_PPC64_ADDR64)
2130 sym = *r->sym_ptr_ptr;
2131 if (!sym_exists_at (syms, opdsymend, symcount,
2132 sym->section->id, sym->value + r->addend))
2135 size += sizeof (asymbol);
2136 size += strlen (syms[i]->name) + 2;
2142 s = *ret = bfd_malloc (size);
2149 names = (char *) (s + count);
2151 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2155 while (r < opd->relocation + relcount
2156 && r->address < syms[i]->value + opd->vma)
2159 if (r == opd->relocation + relcount)
2162 if (r->address != syms[i]->value + opd->vma)
2165 if (r->howto->type != R_PPC64_ADDR64)
2168 sym = *r->sym_ptr_ptr;
2169 if (!sym_exists_at (syms, opdsymend, symcount,
2170 sym->section->id, sym->value + r->addend))
2175 s->flags |= BSF_SYNTHETIC;
2176 s->section = sym->section;
2177 s->value = sym->value + r->addend;
2180 len = strlen (syms[i]->name);
2181 memcpy (names, syms[i]->name, len + 1);
2183 /* Have udata.p point back to the original symbol this
2184 synthetic symbol was derived from. */
2185 s->udata.p = syms[i];
2192 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2193 bfd_byte *contents = NULL;
2195 size_t plt_count = 0;
2196 bfd_vma glink_vma = 0, resolv_vma = 0;
2197 asection *dynamic, *glink = NULL, *relplt = NULL;
2200 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
2202 free_contents_and_exit_err:
2204 free_contents_and_exit:
2211 for (i = secsymend; i < opdsymend; ++i)
2215 /* Ignore bogus symbols. */
2216 if (syms[i]->value > opd->size - 8)
2219 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2220 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2223 size += sizeof (asymbol);
2224 size += strlen (syms[i]->name) + 2;
2228 /* Get start of .glink stubs from DT_PPC64_GLINK. */
2230 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
2232 bfd_byte *dynbuf, *extdyn, *extdynend;
2234 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2236 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2237 goto free_contents_and_exit_err;
2239 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2240 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2243 extdynend = extdyn + dynamic->size;
2244 for (; extdyn < extdynend; extdyn += extdynsize)
2246 Elf_Internal_Dyn dyn;
2247 (*swap_dyn_in) (abfd, extdyn, &dyn);
2249 if (dyn.d_tag == DT_NULL)
2252 if (dyn.d_tag == DT_PPC64_GLINK)
2254 /* The first glink stub starts at DT_PPC64_GLINK plus 32.
2255 See comment in ppc64_elf_finish_dynamic_sections. */
2256 glink_vma = dyn.d_un.d_val + 8 * 4;
2257 /* The .glink section usually does not survive the final
2258 link; search for the section (usually .text) where the
2259 glink stubs now reside. */
2260 glink = bfd_sections_find_if (abfd, section_covers_vma,
2271 /* Determine __glink trampoline by reading the relative branch
2272 from the first glink stub. */
2274 unsigned int off = 0;
2276 while (bfd_get_section_contents (abfd, glink, buf,
2277 glink_vma + off - glink->vma, 4))
2279 unsigned int insn = bfd_get_32 (abfd, buf);
2281 if ((insn & ~0x3fffffc) == 0)
2284 = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
2293 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2295 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2298 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2299 if (!(*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
2300 goto free_contents_and_exit_err;
2302 plt_count = relplt->size / sizeof (Elf64_External_Rela);
2303 size += plt_count * sizeof (asymbol);
2305 p = relplt->relocation;
2306 for (i = 0; i < plt_count; i++, p++)
2308 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2310 size += sizeof ("+0x") - 1 + 16;
2316 goto free_contents_and_exit;
2317 s = *ret = bfd_malloc (size);
2319 goto free_contents_and_exit_err;
2321 names = (char *) (s + count + plt_count + (resolv_vma != 0));
2323 for (i = secsymend; i < opdsymend; ++i)
2327 if (syms[i]->value > opd->size - 8)
2330 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2331 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2335 asection *sec = abfd->sections;
2342 size_t mid = (lo + hi) >> 1;
2343 if (syms[mid]->section->vma < ent)
2345 else if (syms[mid]->section->vma > ent)
2349 sec = syms[mid]->section;
2354 if (lo >= hi && lo > codesecsym)
2355 sec = syms[lo - 1]->section;
2357 for (; sec != NULL; sec = sec->next)
2361 /* SEC_LOAD may not be set if SEC is from a separate debug
2363 if ((sec->flags & SEC_ALLOC) == 0)
2365 if ((sec->flags & SEC_CODE) != 0)
2368 s->flags |= BSF_SYNTHETIC;
2369 s->value = ent - s->section->vma;
2372 len = strlen (syms[i]->name);
2373 memcpy (names, syms[i]->name, len + 1);
2375 /* Have udata.p point back to the original symbol this
2376 synthetic symbol was derived from. */
2377 s->udata.p = syms[i];
2383 if (glink != NULL && relplt != NULL)
2387 /* Add a symbol for the main glink trampoline. */
2388 memset (s, 0, sizeof *s);
2390 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2392 s->value = resolv_vma - glink->vma;
2394 memcpy (names, "__glink_PLTresolve",
2395 sizeof ("__glink_PLTresolve"));
2396 names += sizeof ("__glink_PLTresolve");
2401 /* FIXME: It would be very much nicer to put sym@plt on the
2402 stub rather than on the glink branch table entry. The
2403 objdump disassembler would then use a sensible symbol
2404 name on plt calls. The difficulty in doing so is
2405 a) finding the stubs, and,
2406 b) matching stubs against plt entries, and,
2407 c) there can be multiple stubs for a given plt entry.
2409 Solving (a) could be done by code scanning, but older
2410 ppc64 binaries used different stubs to current code.
2411 (b) is the tricky one since you need to known the toc
2412 pointer for at least one function that uses a pic stub to
2413 be able to calculate the plt address referenced.
2414 (c) means gdb would need to set multiple breakpoints (or
2415 find the glink branch itself) when setting breakpoints
2416 for pending shared library loads. */
2417 p = relplt->relocation;
2418 for (i = 0; i < plt_count; i++, p++)
2422 *s = **p->sym_ptr_ptr;
2423 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2424 we are defining a symbol, ensure one of them is set. */
2425 if ((s->flags & BSF_LOCAL) == 0)
2426 s->flags |= BSF_GLOBAL;
2427 s->flags |= BSF_SYNTHETIC;
2429 s->value = glink_vma - glink->vma;
2432 len = strlen ((*p->sym_ptr_ptr)->name);
2433 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2437 memcpy (names, "+0x", sizeof ("+0x") - 1);
2438 names += sizeof ("+0x") - 1;
2439 bfd_sprintf_vma (abfd, names, p->addend);
2440 names += strlen (names);
2442 memcpy (names, "@plt", sizeof ("@plt"));
2443 names += sizeof ("@plt");
2463 /* The following functions are specific to the ELF linker, while
2464 functions above are used generally. Those named ppc64_elf_* are
2465 called by the main ELF linker code. They appear in this file more
2466 or less in the order in which they are called. eg.
2467 ppc64_elf_check_relocs is called early in the link process,
2468 ppc64_elf_finish_dynamic_sections is one of the last functions
2471 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2472 functions have both a function code symbol and a function descriptor
2473 symbol. A call to foo in a relocatable object file looks like:
2480 The function definition in another object file might be:
2484 . .quad .TOC.@tocbase
2490 When the linker resolves the call during a static link, the branch
2491 unsurprisingly just goes to .foo and the .opd information is unused.
2492 If the function definition is in a shared library, things are a little
2493 different: The call goes via a plt call stub, the opd information gets
2494 copied to the plt, and the linker patches the nop.
2502 . std 2,40(1) # in practice, the call stub
2503 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
2504 . addi 11,11,Lfoo@toc@l # this is the general idea
2512 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2514 The "reloc ()" notation is supposed to indicate that the linker emits
2515 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2518 What are the difficulties here? Well, firstly, the relocations
2519 examined by the linker in check_relocs are against the function code
2520 sym .foo, while the dynamic relocation in the plt is emitted against
2521 the function descriptor symbol, foo. Somewhere along the line, we need
2522 to carefully copy dynamic link information from one symbol to the other.
2523 Secondly, the generic part of the elf linker will make .foo a dynamic
2524 symbol as is normal for most other backends. We need foo dynamic
2525 instead, at least for an application final link. However, when
2526 creating a shared library containing foo, we need to have both symbols
2527 dynamic so that references to .foo are satisfied during the early
2528 stages of linking. Otherwise the linker might decide to pull in a
2529 definition from some other object, eg. a static library.
2531 Update: As of August 2004, we support a new convention. Function
2532 calls may use the function descriptor symbol, ie. "bl foo". This
2533 behaves exactly as "bl .foo". */
2535 /* Of those relocs that might be copied as dynamic relocs, this
2536 function selects those that must be copied when linking a shared
2537 library or PIE, even when the symbol is local. */
2540 must_be_dyn_reloc (struct bfd_link_info *info,
2541 enum elf_ppc64_reloc_type r_type)
2546 /* Only relative relocs can be resolved when the object load
2547 address isn't fixed. DTPREL64 is excluded because the
2548 dynamic linker needs to differentiate global dynamic from
2549 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
2557 case R_PPC64_TPREL16:
2558 case R_PPC64_TPREL16_LO:
2559 case R_PPC64_TPREL16_HI:
2560 case R_PPC64_TPREL16_HA:
2561 case R_PPC64_TPREL16_DS:
2562 case R_PPC64_TPREL16_LO_DS:
2563 case R_PPC64_TPREL16_HIGH:
2564 case R_PPC64_TPREL16_HIGHA:
2565 case R_PPC64_TPREL16_HIGHER:
2566 case R_PPC64_TPREL16_HIGHERA:
2567 case R_PPC64_TPREL16_HIGHEST:
2568 case R_PPC64_TPREL16_HIGHESTA:
2569 case R_PPC64_TPREL64:
2570 /* These relocations are relative but in a shared library the
2571 linker doesn't know the thread pointer base. */
2572 return bfd_link_dll (info);
2576 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2577 copying dynamic variables from a shared lib into an app's dynbss
2578 section, and instead use a dynamic relocation to point into the
2579 shared lib. With code that gcc generates, it's vital that this be
2580 enabled; In the PowerPC64 ABI, the address of a function is actually
2581 the address of a function descriptor, which resides in the .opd
2582 section. gcc uses the descriptor directly rather than going via the
2583 GOT as some other ABI's do, which means that initialized function
2584 pointers must reference the descriptor. Thus, a function pointer
2585 initialized to the address of a function in a shared library will
2586 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2587 redefines the function descriptor symbol to point to the copy. This
2588 presents a problem as a plt entry for that function is also
2589 initialized from the function descriptor symbol and the copy reloc
2590 may not be initialized first. */
2591 #define ELIMINATE_COPY_RELOCS 1
2593 /* Section name for stubs is the associated section name plus this
2595 #define STUB_SUFFIX ".stub"
2598 ppc_stub_long_branch:
2599 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2600 destination, but a 24 bit branch in a stub section will reach.
2603 ppc_stub_plt_branch:
2604 Similar to the above, but a 24 bit branch in the stub section won't
2605 reach its destination.
2606 . addis %r11,%r2,xxx@toc@ha
2607 . ld %r12,xxx@toc@l(%r11)
2612 Used to call a function in a shared library. If it so happens that
2613 the plt entry referenced crosses a 64k boundary, then an extra
2614 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
2615 ppc_stub_plt_call_r2save starts with "std %r2,40(%r1)".
2616 . addis %r11,%r2,xxx@toc@ha
2617 . ld %r12,xxx+0@toc@l(%r11)
2619 . ld %r2,xxx+8@toc@l(%r11)
2620 . ld %r11,xxx+16@toc@l(%r11)
2623 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2624 code to adjust the value and save r2 to support multiple toc sections.
2625 A ppc_stub_long_branch with an r2 offset looks like:
2627 . addis %r2,%r2,off@ha
2628 . addi %r2,%r2,off@l
2631 A ppc_stub_plt_branch with an r2 offset looks like:
2633 . addis %r11,%r2,xxx@toc@ha
2634 . ld %r12,xxx@toc@l(%r11)
2635 . addis %r2,%r2,off@ha
2636 . addi %r2,%r2,off@l
2640 All of the above stubs are shown as their ELFv1 variants. ELFv2
2641 variants exist too, simpler for plt calls since a new toc pointer
2642 and static chain are not loaded by the stub. In addition, ELFv2
2643 has some more complex stubs to handle calls marked with NOTOC
2644 relocs from functions where r2 is not a valid toc pointer. These
2645 come in two flavours, the ones shown below, and _both variants that
2646 start with "std %r2,24(%r1)" to save r2 in the unlikely event that
2647 one call is from a function where r2 is used as the toc pointer but
2648 needs a toc adjusting stub for small-model multi-toc, and another
2649 call is from a function where r2 is not valid.
2650 ppc_stub_long_branch_notoc:
2656 . addis %r12,%r11,dest-1b@ha
2657 . addi %r12,%r12,dest-1b@l
2660 ppc_stub_plt_branch_notoc:
2666 . lis %r12,xxx-1b@highest
2667 . ori %r12,%r12,xxx-1b@higher
2669 . oris %r12,%r12,xxx-1b@high
2670 . ori %r12,%r12,xxx-1b@l
2671 . add %r12,%r11,%r12
2675 ppc_stub_plt_call_notoc:
2681 . lis %r12,xxx-1b@highest
2682 . ori %r12,%r12,xxx-1b@higher
2684 . oris %r12,%r12,xxx-1b@high
2685 . ori %r12,%r12,xxx-1b@l
2686 . ldx %r12,%r11,%r12
2690 In cases where the high instructions would add zero, they are
2691 omitted and following instructions modified in some cases.
2693 For a given stub group (a set of sections all using the same toc
2694 pointer value) there will be just one stub type used for any
2695 particular function symbol. For example, if printf is called from
2696 code with the tocsave optimization (ie. r2 saved in function
2697 prologue) and therefore calls use a ppc_stub_plt_call linkage stub,
2698 and from other code without the tocsave optimization requiring a
2699 ppc_stub_plt_call_r2save linkage stub, a single stub of the latter
2700 type will be created. Calls with the tocsave optimization will
2701 enter this stub after the instruction saving r2. A similar
2702 situation exists when calls are marked with R_PPC64_REL24_NOTOC
2703 relocations. These require a ppc_stub_plt_call_notoc linkage stub
2704 to call an external function like printf. If other calls to printf
2705 require a ppc_stub_plt_call linkage stub then a single
2706 ppc_stub_plt_call_notoc linkage stub will be used for both types of
2707 call. If other calls to printf require a ppc_stub_plt_call_r2save
2708 linkage stub then a single ppc_stub_plt_call_both linkage stub will
2709 be created and calls not requiring r2 to be saved will enter the
2710 stub after the r2 save instruction. There is an analogous
2711 hierarchy of long branch and plt branch stubs for local call
2717 ppc_stub_long_branch,
2718 ppc_stub_long_branch_r2off,
2719 ppc_stub_long_branch_notoc,
2720 ppc_stub_long_branch_both, /* r2off and notoc variants both needed. */
2721 ppc_stub_plt_branch,
2722 ppc_stub_plt_branch_r2off,
2723 ppc_stub_plt_branch_notoc,
2724 ppc_stub_plt_branch_both,
2726 ppc_stub_plt_call_r2save,
2727 ppc_stub_plt_call_notoc,
2728 ppc_stub_plt_call_both,
2729 ppc_stub_global_entry,
2733 /* Information on stub grouping. */
2736 /* The stub section. */
2738 /* This is the section to which stubs in the group will be attached. */
2741 struct map_stub *next;
2742 /* Whether to emit a copy of register save/restore functions in this
2745 /* Current offset within stubs after the insn restoring lr in a
2746 _notoc or _both stub using bcl for pc-relative addressing, or
2747 after the insn restoring lr in a __tls_get_addr_opt plt stub. */
2748 unsigned int lr_restore;
2749 /* Accumulated size of EH info emitted to describe return address
2750 if stubs modify lr. Does not include 17 byte FDE header. */
2751 unsigned int eh_size;
2752 /* Offset in glink_eh_frame to the start of EH info for this group. */
2753 unsigned int eh_base;
2756 struct ppc_stub_hash_entry
2758 /* Base hash table entry structure. */
2759 struct bfd_hash_entry root;
2761 enum ppc_stub_type stub_type;
2763 /* Group information. */
2764 struct map_stub *group;
2766 /* Offset within stub_sec of the beginning of this stub. */
2767 bfd_vma stub_offset;
2769 /* Given the symbol's value and its section we can determine its final
2770 value when building the stubs (so the stub knows where to jump. */
2771 bfd_vma target_value;
2772 asection *target_section;
2774 /* The symbol table entry, if any, that this was derived from. */
2775 struct ppc_link_hash_entry *h;
2776 struct plt_entry *plt_ent;
2779 unsigned char symtype;
2781 /* Symbol st_other. */
2782 unsigned char other;
2785 struct ppc_branch_hash_entry
2787 /* Base hash table entry structure. */
2788 struct bfd_hash_entry root;
2790 /* Offset within branch lookup table. */
2791 unsigned int offset;
2793 /* Generation marker. */
2797 /* Used to track dynamic relocations for local symbols. */
2798 struct ppc_dyn_relocs
2800 struct ppc_dyn_relocs *next;
2802 /* The input section of the reloc. */
2805 /* Total number of relocs copied for the input section. */
2806 unsigned int count : 31;
2808 /* Whether this entry is for STT_GNU_IFUNC symbols. */
2809 unsigned int ifunc : 1;
2812 struct ppc_link_hash_entry
2814 struct elf_link_hash_entry elf;
2818 /* A pointer to the most recently used stub hash entry against this
2820 struct ppc_stub_hash_entry *stub_cache;
2822 /* A pointer to the next symbol starting with a '.' */
2823 struct ppc_link_hash_entry *next_dot_sym;
2826 /* Track dynamic relocs copied for this symbol. */
2827 struct elf_dyn_relocs *dyn_relocs;
2829 /* Link between function code and descriptor symbols. */
2830 struct ppc_link_hash_entry *oh;
2832 /* Flag function code and descriptor symbols. */
2833 unsigned int is_func:1;
2834 unsigned int is_func_descriptor:1;
2835 unsigned int fake:1;
2837 /* Whether global opd/toc sym has been adjusted or not.
2838 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
2839 should be set for all globals defined in any opd/toc section. */
2840 unsigned int adjust_done:1;
2842 /* Set if this is an out-of-line register save/restore function,
2843 with non-standard calling convention. */
2844 unsigned int save_res:1;
2846 /* Set if a duplicate symbol with non-zero localentry is detected,
2847 even when the duplicate symbol does not provide a definition. */
2848 unsigned int non_zero_localentry:1;
2850 /* Contexts in which symbol is used in the GOT (or TOC).
2851 Bits are or'd into the mask as the corresponding relocs are
2852 encountered during check_relocs, with TLS_TLS being set when any
2853 of the other TLS bits are set. tls_optimize clears bits when
2854 optimizing to indicate the corresponding GOT entry type is not
2855 needed. If set, TLS_TLS is never cleared. tls_optimize may also
2856 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
2857 separate flag rather than setting TPREL just for convenience in
2858 distinguishing the two cases.
2859 These flags are also kept for local symbols. */
2860 #define TLS_TLS 1 /* Any TLS reloc. */
2861 #define TLS_GD 2 /* GD reloc. */
2862 #define TLS_LD 4 /* LD reloc. */
2863 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
2864 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
2865 #define TLS_MARK 32 /* __tls_get_addr call marked. */
2866 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2867 #define TLS_EXPLICIT 128 /* Marks TOC section TLS relocs. */
2868 unsigned char tls_mask;
2870 /* The above field is also used to mark function symbols. In which
2871 case TLS_TLS will be 0. */
2872 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
2873 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
2874 #define NON_GOT 256 /* local symbol plt, not stored. */
2877 /* ppc64 ELF linker hash table. */
2879 struct ppc_link_hash_table
2881 struct elf_link_hash_table elf;
2883 /* The stub hash table. */
2884 struct bfd_hash_table stub_hash_table;
2886 /* Another hash table for plt_branch stubs. */
2887 struct bfd_hash_table branch_hash_table;
2889 /* Hash table for function prologue tocsave. */
2890 htab_t tocsave_htab;
2892 /* Various options and other info passed from the linker. */
2893 struct ppc64_elf_params *params;
2895 /* The size of sec_info below. */
2896 unsigned int sec_info_arr_size;
2898 /* Per-section array of extra section info. Done this way rather
2899 than as part of ppc64_elf_section_data so we have the info for
2900 non-ppc64 sections. */
2903 /* Along with elf_gp, specifies the TOC pointer used by this section. */
2908 /* The section group that this section belongs to. */
2909 struct map_stub *group;
2910 /* A temp section list pointer. */
2915 /* Linked list of groups. */
2916 struct map_stub *group;
2918 /* Temp used when calculating TOC pointers. */
2921 asection *toc_first_sec;
2923 /* Used when adding symbols. */
2924 struct ppc_link_hash_entry *dot_syms;
2926 /* Shortcuts to get to dynamic linker sections. */
2928 asection *global_entry;
2931 asection *relpltlocal;
2934 asection *glink_eh_frame;
2936 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
2937 struct ppc_link_hash_entry *tls_get_addr;
2938 struct ppc_link_hash_entry *tls_get_addr_fd;
2940 /* The size of reliplt used by got entry relocs. */
2941 bfd_size_type got_reli_size;
2944 unsigned long stub_count[ppc_stub_global_entry];
2946 /* Number of stubs against global syms. */
2947 unsigned long stub_globals;
2949 /* Set if we're linking code with function descriptors. */
2950 unsigned int opd_abi:1;
2952 /* Support for multiple toc sections. */
2953 unsigned int do_multi_toc:1;
2954 unsigned int multi_toc_needed:1;
2955 unsigned int second_toc_pass:1;
2956 unsigned int do_toc_opt:1;
2958 /* Set if tls optimization is enabled. */
2959 unsigned int do_tls_opt:1;
2961 /* Set if inline plt calls should be converted to direct calls. */
2962 unsigned int can_convert_all_inline_plt:1;
2965 unsigned int stub_error:1;
2967 /* Whether func_desc_adjust needs to be run over symbols. */
2968 unsigned int need_func_desc_adj:1;
2970 /* Whether there exist local gnu indirect function resolvers,
2971 referenced by dynamic relocations. */
2972 unsigned int local_ifunc_resolver:1;
2973 unsigned int maybe_local_ifunc_resolver:1;
2975 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
2976 unsigned int has_plt_localentry0:1;
2978 /* Incremented every time we size stubs. */
2979 unsigned int stub_iteration;
2981 /* Small local sym cache. */
2982 struct sym_cache sym_cache;
2985 /* Rename some of the generic section flags to better document how they
2988 /* Nonzero if this section has TLS related relocations. */
2989 #define has_tls_reloc sec_flg0
2991 /* Nonzero if this section has an old-style call to __tls_get_addr. */
2992 #define has_tls_get_addr_call sec_flg1
2994 /* Nonzero if this section has any toc or got relocs. */
2995 #define has_toc_reloc sec_flg2
2997 /* Nonzero if this section has a call to another section that uses
2999 #define makes_toc_func_call sec_flg3
3001 /* Recursion protection when determining above flag. */
3002 #define call_check_in_progress sec_flg4
3003 #define call_check_done sec_flg5
3005 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3007 #define ppc_hash_table(p) \
3008 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3009 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3011 #define ppc_stub_hash_lookup(table, string, create, copy) \
3012 ((struct ppc_stub_hash_entry *) \
3013 bfd_hash_lookup ((table), (string), (create), (copy)))
3015 #define ppc_branch_hash_lookup(table, string, create, copy) \
3016 ((struct ppc_branch_hash_entry *) \
3017 bfd_hash_lookup ((table), (string), (create), (copy)))
3019 /* Create an entry in the stub hash table. */
3021 static struct bfd_hash_entry *
3022 stub_hash_newfunc (struct bfd_hash_entry *entry,
3023 struct bfd_hash_table *table,
3026 /* Allocate the structure if it has not already been allocated by a
3030 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3035 /* Call the allocation method of the superclass. */
3036 entry = bfd_hash_newfunc (entry, table, string);
3039 struct ppc_stub_hash_entry *eh;
3041 /* Initialize the local fields. */
3042 eh = (struct ppc_stub_hash_entry *) entry;
3043 eh->stub_type = ppc_stub_none;
3045 eh->stub_offset = 0;
3046 eh->target_value = 0;
3047 eh->target_section = NULL;
3056 /* Create an entry in the branch hash table. */
3058 static struct bfd_hash_entry *
3059 branch_hash_newfunc (struct bfd_hash_entry *entry,
3060 struct bfd_hash_table *table,
3063 /* Allocate the structure if it has not already been allocated by a
3067 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3072 /* Call the allocation method of the superclass. */
3073 entry = bfd_hash_newfunc (entry, table, string);
3076 struct ppc_branch_hash_entry *eh;
3078 /* Initialize the local fields. */
3079 eh = (struct ppc_branch_hash_entry *) entry;
3087 /* Create an entry in a ppc64 ELF linker hash table. */
3089 static struct bfd_hash_entry *
3090 link_hash_newfunc (struct bfd_hash_entry *entry,
3091 struct bfd_hash_table *table,
3094 /* Allocate the structure if it has not already been allocated by a
3098 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3103 /* Call the allocation method of the superclass. */
3104 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3107 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3109 memset (&eh->u.stub_cache, 0,
3110 (sizeof (struct ppc_link_hash_entry)
3111 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3113 /* When making function calls, old ABI code references function entry
3114 points (dot symbols), while new ABI code references the function
3115 descriptor symbol. We need to make any combination of reference and
3116 definition work together, without breaking archive linking.
3118 For a defined function "foo" and an undefined call to "bar":
3119 An old object defines "foo" and ".foo", references ".bar" (possibly
3121 A new object defines "foo" and references "bar".
3123 A new object thus has no problem with its undefined symbols being
3124 satisfied by definitions in an old object. On the other hand, the
3125 old object won't have ".bar" satisfied by a new object.
3127 Keep a list of newly added dot-symbols. */
3129 if (string[0] == '.')
3131 struct ppc_link_hash_table *htab;
3133 htab = (struct ppc_link_hash_table *) table;
3134 eh->u.next_dot_sym = htab->dot_syms;
3135 htab->dot_syms = eh;
3142 struct tocsave_entry
3149 tocsave_htab_hash (const void *p)
3151 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3152 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
3156 tocsave_htab_eq (const void *p1, const void *p2)
3158 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3159 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3160 return e1->sec == e2->sec && e1->offset == e2->offset;
3163 /* Destroy a ppc64 ELF linker hash table. */
3166 ppc64_elf_link_hash_table_free (bfd *obfd)
3168 struct ppc_link_hash_table *htab;
3170 htab = (struct ppc_link_hash_table *) obfd->link.hash;
3171 if (htab->tocsave_htab)
3172 htab_delete (htab->tocsave_htab);
3173 bfd_hash_table_free (&htab->branch_hash_table);
3174 bfd_hash_table_free (&htab->stub_hash_table);
3175 _bfd_elf_link_hash_table_free (obfd);
3178 /* Create a ppc64 ELF linker hash table. */
3180 static struct bfd_link_hash_table *
3181 ppc64_elf_link_hash_table_create (bfd *abfd)
3183 struct ppc_link_hash_table *htab;
3184 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3186 htab = bfd_zmalloc (amt);
3190 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3191 sizeof (struct ppc_link_hash_entry),
3198 /* Init the stub hash table too. */
3199 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3200 sizeof (struct ppc_stub_hash_entry)))
3202 _bfd_elf_link_hash_table_free (abfd);
3206 /* And the branch hash table. */
3207 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3208 sizeof (struct ppc_branch_hash_entry)))
3210 bfd_hash_table_free (&htab->stub_hash_table);
3211 _bfd_elf_link_hash_table_free (abfd);
3215 htab->tocsave_htab = htab_try_create (1024,
3219 if (htab->tocsave_htab == NULL)
3221 ppc64_elf_link_hash_table_free (abfd);
3224 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
3226 /* Initializing two fields of the union is just cosmetic. We really
3227 only care about glist, but when compiled on a 32-bit host the
3228 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3229 debugger inspection of these fields look nicer. */
3230 htab->elf.init_got_refcount.refcount = 0;
3231 htab->elf.init_got_refcount.glist = NULL;
3232 htab->elf.init_plt_refcount.refcount = 0;
3233 htab->elf.init_plt_refcount.glist = NULL;
3234 htab->elf.init_got_offset.offset = 0;
3235 htab->elf.init_got_offset.glist = NULL;
3236 htab->elf.init_plt_offset.offset = 0;
3237 htab->elf.init_plt_offset.glist = NULL;
3239 return &htab->elf.root;
3242 /* Create sections for linker generated code. */
3245 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3247 struct ppc_link_hash_table *htab;
3250 htab = ppc_hash_table (info);
3252 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3253 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3254 if (htab->params->save_restore_funcs)
3256 /* Create .sfpr for code to save and restore fp regs. */
3257 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3259 if (htab->sfpr == NULL
3260 || !bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3264 if (bfd_link_relocatable (info))
3267 /* Create .glink for lazy dynamic linking support. */
3268 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3270 if (htab->glink == NULL
3271 || !bfd_set_section_alignment (dynobj, htab->glink, 3))
3274 /* The part of .glink used by global entry stubs, separate so that
3275 it can be aligned appropriately without affecting htab->glink. */
3276 htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3278 if (htab->global_entry == NULL
3279 || !bfd_set_section_alignment (dynobj, htab->global_entry, 2))
3282 if (!info->no_ld_generated_unwind_info)
3284 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3285 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3286 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
3289 if (htab->glink_eh_frame == NULL
3290 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
3294 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3295 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
3296 if (htab->elf.iplt == NULL
3297 || !bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
3300 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3301 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3303 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
3304 if (htab->elf.irelplt == NULL
3305 || !bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
3308 /* Create branch lookup table for plt_branch stubs. */
3309 flags = (SEC_ALLOC | SEC_LOAD
3310 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3311 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3313 if (htab->brlt == NULL
3314 || !bfd_set_section_alignment (dynobj, htab->brlt, 3))
3317 /* Local plt entries, put in .branch_lt but a separate section for
3319 htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3321 if (htab->pltlocal == NULL
3322 || !bfd_set_section_alignment (dynobj, htab->pltlocal, 3))
3325 if (!bfd_link_pic (info))
3328 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3329 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3331 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
3332 if (htab->relbrlt == NULL
3333 || !bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3337 = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags);
3338 if (htab->relpltlocal == NULL
3339 || !bfd_set_section_alignment (dynobj, htab->relpltlocal, 3))
3345 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3348 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
3349 struct ppc64_elf_params *params)
3351 struct ppc_link_hash_table *htab;
3353 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
3355 /* Always hook our dynamic sections into the first bfd, which is the
3356 linker created stub bfd. This ensures that the GOT header is at
3357 the start of the output TOC section. */
3358 htab = ppc_hash_table (info);
3359 htab->elf.dynobj = params->stub_bfd;
3360 htab->params = params;
3362 return create_linkage_sections (htab->elf.dynobj, info);
3365 /* Build a name for an entry in the stub hash table. */
3368 ppc_stub_name (const asection *input_section,
3369 const asection *sym_sec,
3370 const struct ppc_link_hash_entry *h,
3371 const Elf_Internal_Rela *rel)
3376 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3377 offsets from a sym as a branch target? In fact, we could
3378 probably assume the addend is always zero. */
3379 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3383 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3384 stub_name = bfd_malloc (len);
3385 if (stub_name == NULL)
3388 len = sprintf (stub_name, "%08x.%s+%x",
3389 input_section->id & 0xffffffff,
3390 h->elf.root.root.string,
3391 (int) rel->r_addend & 0xffffffff);
3395 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3396 stub_name = bfd_malloc (len);
3397 if (stub_name == NULL)
3400 len = sprintf (stub_name, "%08x.%x:%x+%x",
3401 input_section->id & 0xffffffff,
3402 sym_sec->id & 0xffffffff,
3403 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3404 (int) rel->r_addend & 0xffffffff);
3406 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3407 stub_name[len - 2] = 0;
3411 /* Look up an entry in the stub hash. Stub entries are cached because
3412 creating the stub name takes a bit of time. */
3414 static struct ppc_stub_hash_entry *
3415 ppc_get_stub_entry (const asection *input_section,
3416 const asection *sym_sec,
3417 struct ppc_link_hash_entry *h,
3418 const Elf_Internal_Rela *rel,
3419 struct ppc_link_hash_table *htab)
3421 struct ppc_stub_hash_entry *stub_entry;
3422 struct map_stub *group;
3424 /* If this input section is part of a group of sections sharing one
3425 stub section, then use the id of the first section in the group.
3426 Stub names need to include a section id, as there may well be
3427 more than one stub used to reach say, printf, and we need to
3428 distinguish between them. */
3429 group = htab->sec_info[input_section->id].u.group;
3433 if (h != NULL && h->u.stub_cache != NULL
3434 && h->u.stub_cache->h == h
3435 && h->u.stub_cache->group == group)
3437 stub_entry = h->u.stub_cache;
3443 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
3444 if (stub_name == NULL)
3447 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3448 stub_name, FALSE, FALSE);
3450 h->u.stub_cache = stub_entry;
3458 /* Add a new stub entry to the stub hash. Not all fields of the new
3459 stub entry are initialised. */
3461 static struct ppc_stub_hash_entry *
3462 ppc_add_stub (const char *stub_name,
3464 struct bfd_link_info *info)
3466 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3467 struct map_stub *group;
3470 struct ppc_stub_hash_entry *stub_entry;
3472 group = htab->sec_info[section->id].u.group;
3473 link_sec = group->link_sec;
3474 stub_sec = group->stub_sec;
3475 if (stub_sec == NULL)
3481 namelen = strlen (link_sec->name);
3482 len = namelen + sizeof (STUB_SUFFIX);
3483 s_name = bfd_alloc (htab->params->stub_bfd, len);
3487 memcpy (s_name, link_sec->name, namelen);
3488 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3489 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
3490 if (stub_sec == NULL)
3492 group->stub_sec = stub_sec;
3495 /* Enter this entry into the linker stub hash table. */
3496 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3498 if (stub_entry == NULL)
3500 /* xgettext:c-format */
3501 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
3502 section->owner, stub_name);
3506 stub_entry->group = group;
3507 stub_entry->stub_offset = 0;
3511 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3512 not already done. */
3515 create_got_section (bfd *abfd, struct bfd_link_info *info)
3517 asection *got, *relgot;
3519 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3521 if (!is_ppc64_elf (abfd))
3527 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
3530 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3531 | SEC_LINKER_CREATED);
3533 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3535 || !bfd_set_section_alignment (abfd, got, 3))
3538 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3539 flags | SEC_READONLY);
3541 || !bfd_set_section_alignment (abfd, relgot, 3))
3544 ppc64_elf_tdata (abfd)->got = got;
3545 ppc64_elf_tdata (abfd)->relgot = relgot;
3549 /* Follow indirect and warning symbol links. */
3551 static inline struct bfd_link_hash_entry *
3552 follow_link (struct bfd_link_hash_entry *h)
3554 while (h->type == bfd_link_hash_indirect
3555 || h->type == bfd_link_hash_warning)
3560 static inline struct elf_link_hash_entry *
3561 elf_follow_link (struct elf_link_hash_entry *h)
3563 return (struct elf_link_hash_entry *) follow_link (&h->root);
3566 static inline struct ppc_link_hash_entry *
3567 ppc_follow_link (struct ppc_link_hash_entry *h)
3569 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
3572 /* Merge PLT info on FROM with that on TO. */
3575 move_plt_plist (struct ppc_link_hash_entry *from,
3576 struct ppc_link_hash_entry *to)
3578 if (from->elf.plt.plist != NULL)
3580 if (to->elf.plt.plist != NULL)
3582 struct plt_entry **entp;
3583 struct plt_entry *ent;
3585 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3587 struct plt_entry *dent;
3589 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3590 if (dent->addend == ent->addend)
3592 dent->plt.refcount += ent->plt.refcount;
3599 *entp = to->elf.plt.plist;
3602 to->elf.plt.plist = from->elf.plt.plist;
3603 from->elf.plt.plist = NULL;
3607 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3610 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3611 struct elf_link_hash_entry *dir,
3612 struct elf_link_hash_entry *ind)
3614 struct ppc_link_hash_entry *edir, *eind;
3616 edir = (struct ppc_link_hash_entry *) dir;
3617 eind = (struct ppc_link_hash_entry *) ind;
3619 edir->is_func |= eind->is_func;
3620 edir->is_func_descriptor |= eind->is_func_descriptor;
3621 edir->tls_mask |= eind->tls_mask;
3622 if (eind->oh != NULL)
3623 edir->oh = ppc_follow_link (eind->oh);
3625 if (edir->elf.versioned != versioned_hidden)
3626 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3627 edir->elf.ref_regular |= eind->elf.ref_regular;
3628 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3629 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3630 edir->elf.needs_plt |= eind->elf.needs_plt;
3631 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3633 /* If we were called to copy over info for a weak sym, don't copy
3634 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
3635 in order to simplify readonly_dynrelocs and save a field in the
3636 symbol hash entry, but that means dyn_relocs can't be used in any
3637 tests about a specific symbol, or affect other symbol flags which
3639 if (eind->elf.root.type != bfd_link_hash_indirect)
3642 /* Copy over any dynamic relocs we may have on the indirect sym. */
3643 if (eind->dyn_relocs != NULL)
3645 if (edir->dyn_relocs != NULL)
3647 struct elf_dyn_relocs **pp;
3648 struct elf_dyn_relocs *p;
3650 /* Add reloc counts against the indirect sym to the direct sym
3651 list. Merge any entries against the same section. */
3652 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3654 struct elf_dyn_relocs *q;
3656 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3657 if (q->sec == p->sec)
3659 q->pc_count += p->pc_count;
3660 q->count += p->count;
3667 *pp = edir->dyn_relocs;
3670 edir->dyn_relocs = eind->dyn_relocs;
3671 eind->dyn_relocs = NULL;
3674 /* Copy over got entries that we may have already seen to the
3675 symbol which just became indirect. */
3676 if (eind->elf.got.glist != NULL)
3678 if (edir->elf.got.glist != NULL)
3680 struct got_entry **entp;
3681 struct got_entry *ent;
3683 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3685 struct got_entry *dent;
3687 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3688 if (dent->addend == ent->addend
3689 && dent->owner == ent->owner
3690 && dent->tls_type == ent->tls_type)
3692 dent->got.refcount += ent->got.refcount;
3699 *entp = edir->elf.got.glist;
3702 edir->elf.got.glist = eind->elf.got.glist;
3703 eind->elf.got.glist = NULL;
3706 /* And plt entries. */
3707 move_plt_plist (eind, edir);
3709 if (eind->elf.dynindx != -1)
3711 if (edir->elf.dynindx != -1)
3712 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3713 edir->elf.dynstr_index);
3714 edir->elf.dynindx = eind->elf.dynindx;
3715 edir->elf.dynstr_index = eind->elf.dynstr_index;
3716 eind->elf.dynindx = -1;
3717 eind->elf.dynstr_index = 0;
3721 /* Find the function descriptor hash entry from the given function code
3722 hash entry FH. Link the entries via their OH fields. */
3724 static struct ppc_link_hash_entry *
3725 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3727 struct ppc_link_hash_entry *fdh = fh->oh;
3731 const char *fd_name = fh->elf.root.root.string + 1;
3733 fdh = (struct ppc_link_hash_entry *)
3734 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3738 fdh->is_func_descriptor = 1;
3744 fdh = ppc_follow_link (fdh);
3745 fdh->is_func_descriptor = 1;
3750 /* Make a fake function descriptor sym for the undefined code sym FH. */
3752 static struct ppc_link_hash_entry *
3753 make_fdh (struct bfd_link_info *info,
3754 struct ppc_link_hash_entry *fh)
3756 bfd *abfd = fh->elf.root.u.undef.abfd;
3757 struct bfd_link_hash_entry *bh = NULL;
3758 struct ppc_link_hash_entry *fdh;
3759 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
3763 if (!_bfd_generic_link_add_one_symbol (info, abfd,
3764 fh->elf.root.root.string + 1,
3765 flags, bfd_und_section_ptr, 0,
3766 NULL, FALSE, FALSE, &bh))
3769 fdh = (struct ppc_link_hash_entry *) bh;
3770 fdh->elf.non_elf = 0;
3772 fdh->is_func_descriptor = 1;
3779 /* Fix function descriptor symbols defined in .opd sections to be
3783 ppc64_elf_add_symbol_hook (bfd *ibfd,
3784 struct bfd_link_info *info,
3785 Elf_Internal_Sym *isym,
3787 flagword *flags ATTRIBUTE_UNUSED,
3792 && strcmp ((*sec)->name, ".opd") == 0)
3796 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3797 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
3798 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3800 /* If the symbol is a function defined in .opd, and the function
3801 code is in a discarded group, let it appear to be undefined. */
3802 if (!bfd_link_relocatable (info)
3803 && (*sec)->reloc_count != 0
3804 && opd_entry_value (*sec, *value, &code_sec, NULL,
3805 FALSE) != (bfd_vma) -1
3806 && discarded_section (code_sec))
3808 *sec = bfd_und_section_ptr;
3809 isym->st_shndx = SHN_UNDEF;
3812 else if (*sec != NULL
3813 && strcmp ((*sec)->name, ".toc") == 0
3814 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
3816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3818 htab->params->object_in_toc = 1;
3821 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
3823 if (abiversion (ibfd) == 0)
3824 set_abiversion (ibfd, 2);
3825 else if (abiversion (ibfd) == 1)
3827 _bfd_error_handler (_("symbol '%s' has invalid st_other"
3828 " for ABI version 1"), *name);
3829 bfd_set_error (bfd_error_bad_value);
3837 /* Merge non-visibility st_other attributes: local entry point. */
3840 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
3841 const Elf_Internal_Sym *isym,
3842 bfd_boolean definition,
3843 bfd_boolean dynamic)
3845 if (definition && (!dynamic || !h->def_regular))
3846 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
3847 | ELF_ST_VISIBILITY (h->other));
3850 /* Hook called on merging a symbol. We use this to clear "fake" since
3851 we now have a real symbol. */
3854 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
3855 const Elf_Internal_Sym *isym,
3856 asection **psec ATTRIBUTE_UNUSED,
3857 bfd_boolean newdef ATTRIBUTE_UNUSED,
3858 bfd_boolean olddef ATTRIBUTE_UNUSED,
3859 bfd *oldbfd ATTRIBUTE_UNUSED,
3860 const asection *oldsec ATTRIBUTE_UNUSED)
3862 ((struct ppc_link_hash_entry *) h)->fake = 0;
3863 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
3864 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
3868 /* This function makes an old ABI object reference to ".bar" cause the
3869 inclusion of a new ABI object archive that defines "bar".
3870 NAME is a symbol defined in an archive. Return a symbol in the hash
3871 table that might be satisfied by the archive symbols. */
3873 static struct elf_link_hash_entry *
3874 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3875 struct bfd_link_info *info,
3878 struct elf_link_hash_entry *h;
3882 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3884 /* Don't return this sym if it is a fake function descriptor
3885 created by add_symbol_adjust. */
3886 && !((struct ppc_link_hash_entry *) h)->fake)
3892 len = strlen (name);
3893 dot_name = bfd_alloc (abfd, len + 2);
3894 if (dot_name == NULL)
3895 return (struct elf_link_hash_entry *) -1;
3897 memcpy (dot_name + 1, name, len + 1);
3898 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3899 bfd_release (abfd, dot_name);
3903 /* This function satisfies all old ABI object references to ".bar" if a
3904 new ABI object defines "bar". Well, at least, undefined dot symbols
3905 are made weak. This stops later archive searches from including an
3906 object if we already have a function descriptor definition. It also
3907 prevents the linker complaining about undefined symbols.
3908 We also check and correct mismatched symbol visibility here. The
3909 most restrictive visibility of the function descriptor and the
3910 function entry symbol is used. */
3913 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
3915 struct ppc_link_hash_table *htab;
3916 struct ppc_link_hash_entry *fdh;
3918 if (eh->elf.root.type == bfd_link_hash_warning)
3919 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
3921 if (eh->elf.root.type == bfd_link_hash_indirect)
3924 if (eh->elf.root.root.string[0] != '.')
3927 htab = ppc_hash_table (info);
3931 fdh = lookup_fdh (eh, htab);
3933 && !bfd_link_relocatable (info)
3934 && (eh->elf.root.type == bfd_link_hash_undefined
3935 || eh->elf.root.type == bfd_link_hash_undefweak)
3936 && eh->elf.ref_regular)
3938 /* Make an undefined function descriptor sym, in order to
3939 pull in an --as-needed shared lib. Archives are handled
3941 fdh = make_fdh (info, eh);
3948 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
3949 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
3951 /* Make both descriptor and entry symbol have the most
3952 constraining visibility of either symbol. */
3953 if (entry_vis < descr_vis)
3954 fdh->elf.other += entry_vis - descr_vis;
3955 else if (entry_vis > descr_vis)
3956 eh->elf.other += descr_vis - entry_vis;
3958 /* Propagate reference flags from entry symbol to function
3959 descriptor symbol. */
3960 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
3961 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
3962 fdh->elf.ref_regular |= eh->elf.ref_regular;
3963 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
3965 if (!fdh->elf.forced_local
3966 && fdh->elf.dynindx == -1
3967 && fdh->elf.versioned != versioned_hidden
3968 && (bfd_link_dll (info)
3969 || fdh->elf.def_dynamic
3970 || fdh->elf.ref_dynamic)
3971 && (eh->elf.ref_regular
3972 || eh->elf.def_regular))
3974 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
3982 /* Set up opd section info and abiversion for IBFD, and process list
3983 of dot-symbols we made in link_hash_newfunc. */
3986 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
3988 struct ppc_link_hash_table *htab;
3989 struct ppc_link_hash_entry **p, *eh;
3990 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
3992 if (opd != NULL && opd->size != 0)
3994 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
3995 ppc64_elf_section_data (opd)->sec_type = sec_opd;
3997 if (abiversion (ibfd) == 0)
3998 set_abiversion (ibfd, 1);
3999 else if (abiversion (ibfd) >= 2)
4001 /* xgettext:c-format */
4002 _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"),
4003 ibfd, abiversion (ibfd));
4004 bfd_set_error (bfd_error_bad_value);
4009 if (is_ppc64_elf (info->output_bfd))
4011 /* For input files without an explicit abiversion in e_flags
4012 we should have flagged any with symbol st_other bits set
4013 as ELFv1 and above flagged those with .opd as ELFv2.
4014 Set the output abiversion if not yet set, and for any input
4015 still ambiguous, take its abiversion from the output.
4016 Differences in ABI are reported later. */
4017 if (abiversion (info->output_bfd) == 0)
4018 set_abiversion (info->output_bfd, abiversion (ibfd));
4019 else if (abiversion (ibfd) == 0)
4020 set_abiversion (ibfd, abiversion (info->output_bfd));
4023 htab = ppc_hash_table (info);
4027 if (opd != NULL && opd->size != 0
4028 && (ibfd->flags & DYNAMIC) == 0
4029 && (opd->flags & SEC_RELOC) != 0
4030 && opd->reloc_count != 0
4031 && !bfd_is_abs_section (opd->output_section)
4032 && info->gc_sections)
4034 /* Garbage collection needs some extra help with .opd sections.
4035 We don't want to necessarily keep everything referenced by
4036 relocs in .opd, as that would keep all functions. Instead,
4037 if we reference an .opd symbol (a function descriptor), we
4038 want to keep the function code symbol's section. This is
4039 easy for global symbols, but for local syms we need to keep
4040 information about the associated function section. */
4042 asection **opd_sym_map;
4043 Elf_Internal_Shdr *symtab_hdr;
4044 Elf_Internal_Rela *relocs, *rel_end, *rel;
4046 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
4047 opd_sym_map = bfd_zalloc (ibfd, amt);
4048 if (opd_sym_map == NULL)
4050 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
4051 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
4055 symtab_hdr = &elf_symtab_hdr (ibfd);
4056 rel_end = relocs + opd->reloc_count - 1;
4057 for (rel = relocs; rel < rel_end; rel++)
4059 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
4060 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
4062 if (r_type == R_PPC64_ADDR64
4063 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
4064 && r_symndx < symtab_hdr->sh_info)
4066 Elf_Internal_Sym *isym;
4069 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
4072 if (elf_section_data (opd)->relocs != relocs)
4077 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
4078 if (s != NULL && s != opd)
4079 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
4082 if (elf_section_data (opd)->relocs != relocs)
4086 p = &htab->dot_syms;
4087 while ((eh = *p) != NULL)
4090 if (&eh->elf == htab->elf.hgot)
4092 else if (htab->elf.hgot == NULL
4093 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4094 htab->elf.hgot = &eh->elf;
4095 else if (abiversion (ibfd) <= 1)
4097 htab->need_func_desc_adj = 1;
4098 if (!add_symbol_adjust (eh, info))
4101 p = &eh->u.next_dot_sym;
4106 /* Undo hash table changes when an --as-needed input file is determined
4107 not to be needed. */
4110 ppc64_elf_notice_as_needed (bfd *ibfd,
4111 struct bfd_link_info *info,
4112 enum notice_asneeded_action act)
4114 if (act == notice_not_needed)
4116 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4121 htab->dot_syms = NULL;
4123 return _bfd_elf_notice_as_needed (ibfd, info, act);
4126 /* If --just-symbols against a final linked binary, then assume we need
4127 toc adjusting stubs when calling functions defined there. */
4130 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4132 if ((sec->flags & SEC_CODE) != 0
4133 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4134 && is_ppc64_elf (sec->owner))
4136 if (abiversion (sec->owner) >= 2
4137 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4138 sec->has_toc_reloc = 1;
4140 _bfd_elf_link_just_syms (sec, info);
4143 static struct plt_entry **
4144 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4145 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4147 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4148 struct plt_entry **local_plt;
4149 unsigned char *local_got_tls_masks;
4151 if (local_got_ents == NULL)
4153 bfd_size_type size = symtab_hdr->sh_info;
4155 size *= (sizeof (*local_got_ents)
4156 + sizeof (*local_plt)
4157 + sizeof (*local_got_tls_masks));
4158 local_got_ents = bfd_zalloc (abfd, size);
4159 if (local_got_ents == NULL)
4161 elf_local_got_ents (abfd) = local_got_ents;
4164 if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0)
4166 struct got_entry *ent;
4168 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4169 if (ent->addend == r_addend
4170 && ent->owner == abfd
4171 && ent->tls_type == tls_type)
4175 bfd_size_type amt = sizeof (*ent);
4176 ent = bfd_alloc (abfd, amt);
4179 ent->next = local_got_ents[r_symndx];
4180 ent->addend = r_addend;
4182 ent->tls_type = tls_type;
4183 ent->is_indirect = FALSE;
4184 ent->got.refcount = 0;
4185 local_got_ents[r_symndx] = ent;
4187 ent->got.refcount += 1;
4190 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4191 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4192 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
4194 return local_plt + r_symndx;
4198 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4200 struct plt_entry *ent;
4202 for (ent = *plist; ent != NULL; ent = ent->next)
4203 if (ent->addend == addend)
4207 bfd_size_type amt = sizeof (*ent);
4208 ent = bfd_alloc (abfd, amt);
4212 ent->addend = addend;
4213 ent->plt.refcount = 0;
4216 ent->plt.refcount += 1;
4221 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4223 return (r_type == R_PPC64_REL24
4224 || r_type == R_PPC64_REL24_NOTOC
4225 || r_type == R_PPC64_REL14
4226 || r_type == R_PPC64_REL14_BRTAKEN
4227 || r_type == R_PPC64_REL14_BRNTAKEN
4228 || r_type == R_PPC64_ADDR24
4229 || r_type == R_PPC64_ADDR14
4230 || r_type == R_PPC64_ADDR14_BRTAKEN
4231 || r_type == R_PPC64_ADDR14_BRNTAKEN
4232 || r_type == R_PPC64_PLTCALL);
4235 /* Relocs on inline plt call sequence insns prior to the call. */
4238 is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type)
4240 return (r_type == R_PPC64_PLT16_HA
4241 || r_type == R_PPC64_PLT16_HI
4242 || r_type == R_PPC64_PLT16_LO
4243 || r_type == R_PPC64_PLT16_LO_DS
4244 || r_type == R_PPC64_PLTSEQ);
4247 /* Look through the relocs for a section during the first phase, and
4248 calculate needed space in the global offset table, procedure
4249 linkage table, and dynamic reloc sections. */
4252 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4253 asection *sec, const Elf_Internal_Rela *relocs)
4255 struct ppc_link_hash_table *htab;
4256 Elf_Internal_Shdr *symtab_hdr;
4257 struct elf_link_hash_entry **sym_hashes;
4258 const Elf_Internal_Rela *rel;
4259 const Elf_Internal_Rela *rel_end;
4261 struct elf_link_hash_entry *tga, *dottga;
4264 if (bfd_link_relocatable (info))
4267 /* Don't do anything special with non-loaded, non-alloced sections.
4268 In particular, any relocs in such sections should not affect GOT
4269 and PLT reference counting (ie. we don't allow them to create GOT
4270 or PLT entries), there's no possibility or desire to optimize TLS
4271 relocs, and there's not much point in propagating relocs to shared
4272 libs that the dynamic linker won't relocate. */
4273 if ((sec->flags & SEC_ALLOC) == 0)
4276 BFD_ASSERT (is_ppc64_elf (abfd));
4278 htab = ppc_hash_table (info);
4282 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4283 FALSE, FALSE, TRUE);
4284 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4285 FALSE, FALSE, TRUE);
4286 symtab_hdr = &elf_symtab_hdr (abfd);
4287 sym_hashes = elf_sym_hashes (abfd);
4289 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
4290 rel_end = relocs + sec->reloc_count;
4291 for (rel = relocs; rel < rel_end; rel++)
4293 unsigned long r_symndx;
4294 struct elf_link_hash_entry *h;
4295 enum elf_ppc64_reloc_type r_type;
4297 struct _ppc64_elf_section_data *ppc64_sec;
4298 struct plt_entry **ifunc, **plt_list;
4300 r_symndx = ELF64_R_SYM (rel->r_info);
4301 if (r_symndx < symtab_hdr->sh_info)
4305 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4306 h = elf_follow_link (h);
4308 if (h == htab->elf.hgot)
4309 sec->has_toc_reloc = 1;
4316 if (h->type == STT_GNU_IFUNC)
4319 ifunc = &h->plt.plist;
4324 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4329 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4331 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4333 NON_GOT | PLT_IFUNC);
4339 r_type = ELF64_R_TYPE (rel->r_info);
4344 /* These special tls relocs tie a call to __tls_get_addr with
4345 its parameter symbol. */
4347 ((struct ppc_link_hash_entry *) h)->tls_mask |= TLS_TLS | TLS_MARK;
4349 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4351 NON_GOT | TLS_TLS | TLS_MARK))
4353 sec->has_tls_reloc = 1;
4356 case R_PPC64_GOT_TLSLD16:
4357 case R_PPC64_GOT_TLSLD16_LO:
4358 case R_PPC64_GOT_TLSLD16_HI:
4359 case R_PPC64_GOT_TLSLD16_HA:
4360 tls_type = TLS_TLS | TLS_LD;
4363 case R_PPC64_GOT_TLSGD16:
4364 case R_PPC64_GOT_TLSGD16_LO:
4365 case R_PPC64_GOT_TLSGD16_HI:
4366 case R_PPC64_GOT_TLSGD16_HA:
4367 tls_type = TLS_TLS | TLS_GD;
4370 case R_PPC64_GOT_TPREL16_DS:
4371 case R_PPC64_GOT_TPREL16_LO_DS:
4372 case R_PPC64_GOT_TPREL16_HI:
4373 case R_PPC64_GOT_TPREL16_HA:
4374 if (bfd_link_dll (info))
4375 info->flags |= DF_STATIC_TLS;
4376 tls_type = TLS_TLS | TLS_TPREL;
4379 case R_PPC64_GOT_DTPREL16_DS:
4380 case R_PPC64_GOT_DTPREL16_LO_DS:
4381 case R_PPC64_GOT_DTPREL16_HI:
4382 case R_PPC64_GOT_DTPREL16_HA:
4383 tls_type = TLS_TLS | TLS_DTPREL;
4385 sec->has_tls_reloc = 1;
4389 case R_PPC64_GOT16_DS:
4390 case R_PPC64_GOT16_HA:
4391 case R_PPC64_GOT16_HI:
4392 case R_PPC64_GOT16_LO:
4393 case R_PPC64_GOT16_LO_DS:
4394 /* This symbol requires a global offset table entry. */
4395 sec->has_toc_reloc = 1;
4396 if (r_type == R_PPC64_GOT_TLSLD16
4397 || r_type == R_PPC64_GOT_TLSGD16
4398 || r_type == R_PPC64_GOT_TPREL16_DS
4399 || r_type == R_PPC64_GOT_DTPREL16_DS
4400 || r_type == R_PPC64_GOT16
4401 || r_type == R_PPC64_GOT16_DS)
4403 htab->do_multi_toc = 1;
4404 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
4407 if (ppc64_elf_tdata (abfd)->got == NULL
4408 && !create_got_section (abfd, info))
4413 struct ppc_link_hash_entry *eh;
4414 struct got_entry *ent;
4416 eh = (struct ppc_link_hash_entry *) h;
4417 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4418 if (ent->addend == rel->r_addend
4419 && ent->owner == abfd
4420 && ent->tls_type == tls_type)
4424 bfd_size_type amt = sizeof (*ent);
4425 ent = bfd_alloc (abfd, amt);
4428 ent->next = eh->elf.got.glist;
4429 ent->addend = rel->r_addend;
4431 ent->tls_type = tls_type;
4432 ent->is_indirect = FALSE;
4433 ent->got.refcount = 0;
4434 eh->elf.got.glist = ent;
4436 ent->got.refcount += 1;
4437 eh->tls_mask |= tls_type;
4440 /* This is a global offset table entry for a local symbol. */
4441 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4442 rel->r_addend, tls_type))
4445 /* We may also need a plt entry if the symbol turns out to be
4447 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
4449 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
4454 case R_PPC64_PLT16_HA:
4455 case R_PPC64_PLT16_HI:
4456 case R_PPC64_PLT16_LO:
4457 case R_PPC64_PLT16_LO_DS:
4460 /* This symbol requires a procedure linkage table entry. */
4465 if (h->root.root.string[0] == '.'
4466 && h->root.root.string[1] != '\0')
4467 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4468 ((struct ppc_link_hash_entry *) h)->tls_mask |= PLT_KEEP;
4469 plt_list = &h->plt.plist;
4471 if (plt_list == NULL)
4472 plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4474 NON_GOT | PLT_KEEP);
4475 if (!update_plt_info (abfd, plt_list, rel->r_addend))
4479 /* The following relocations don't need to propagate the
4480 relocation if linking a shared object since they are
4481 section relative. */
4482 case R_PPC64_SECTOFF:
4483 case R_PPC64_SECTOFF_LO:
4484 case R_PPC64_SECTOFF_HI:
4485 case R_PPC64_SECTOFF_HA:
4486 case R_PPC64_SECTOFF_DS:
4487 case R_PPC64_SECTOFF_LO_DS:
4488 case R_PPC64_DTPREL16:
4489 case R_PPC64_DTPREL16_LO:
4490 case R_PPC64_DTPREL16_HI:
4491 case R_PPC64_DTPREL16_HA:
4492 case R_PPC64_DTPREL16_DS:
4493 case R_PPC64_DTPREL16_LO_DS:
4494 case R_PPC64_DTPREL16_HIGH:
4495 case R_PPC64_DTPREL16_HIGHA:
4496 case R_PPC64_DTPREL16_HIGHER:
4497 case R_PPC64_DTPREL16_HIGHERA:
4498 case R_PPC64_DTPREL16_HIGHEST:
4499 case R_PPC64_DTPREL16_HIGHESTA:
4504 case R_PPC64_REL16_LO:
4505 case R_PPC64_REL16_HI:
4506 case R_PPC64_REL16_HA:
4507 case R_PPC64_REL16_HIGH:
4508 case R_PPC64_REL16_HIGHA:
4509 case R_PPC64_REL16_HIGHER:
4510 case R_PPC64_REL16_HIGHERA:
4511 case R_PPC64_REL16_HIGHEST:
4512 case R_PPC64_REL16_HIGHESTA:
4513 case R_PPC64_REL16DX_HA:
4516 /* Not supported as a dynamic relocation. */
4517 case R_PPC64_ADDR64_LOCAL:
4518 if (bfd_link_pic (info))
4520 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
4522 /* xgettext:c-format */
4523 info->callbacks->einfo (_("%H: %s reloc unsupported "
4524 "in shared libraries and PIEs\n"),
4525 abfd, sec, rel->r_offset,
4526 ppc64_elf_howto_table[r_type]->name);
4527 bfd_set_error (bfd_error_bad_value);
4533 case R_PPC64_TOC16_DS:
4534 htab->do_multi_toc = 1;
4535 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
4537 case R_PPC64_TOC16_LO:
4538 case R_PPC64_TOC16_HI:
4539 case R_PPC64_TOC16_HA:
4540 case R_PPC64_TOC16_LO_DS:
4541 sec->has_toc_reloc = 1;
4548 /* This relocation describes the C++ object vtable hierarchy.
4549 Reconstruct it for later use during GC. */
4550 case R_PPC64_GNU_VTINHERIT:
4551 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4555 /* This relocation describes which C++ vtable entries are actually
4556 used. Record for later use during GC. */
4557 case R_PPC64_GNU_VTENTRY:
4558 BFD_ASSERT (h != NULL);
4560 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4565 case R_PPC64_REL14_BRTAKEN:
4566 case R_PPC64_REL14_BRNTAKEN:
4568 asection *dest = NULL;
4570 /* Heuristic: If jumping outside our section, chances are
4571 we are going to need a stub. */
4574 /* If the sym is weak it may be overridden later, so
4575 don't assume we know where a weak sym lives. */
4576 if (h->root.type == bfd_link_hash_defined)
4577 dest = h->root.u.def.section;
4581 Elf_Internal_Sym *isym;
4583 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4588 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
4592 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4596 case R_PPC64_PLTCALL:
4597 ppc64_elf_section_data (sec)->has_pltcall = 1;
4601 case R_PPC64_REL24_NOTOC:
4607 if (h->root.root.string[0] == '.'
4608 && h->root.root.string[1] != '\0')
4609 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4611 if (h == tga || h == dottga)
4613 sec->has_tls_reloc = 1;
4615 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4616 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4617 /* We have a new-style __tls_get_addr call with
4621 /* Mark this section as having an old-style call. */
4622 sec->has_tls_get_addr_call = 1;
4624 plt_list = &h->plt.plist;
4627 /* We may need a .plt entry if the function this reloc
4628 refers to is in a shared lib. */
4630 && !update_plt_info (abfd, plt_list, rel->r_addend))
4634 case R_PPC64_ADDR14:
4635 case R_PPC64_ADDR14_BRNTAKEN:
4636 case R_PPC64_ADDR14_BRTAKEN:
4637 case R_PPC64_ADDR24:
4640 case R_PPC64_TPREL64:
4641 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4642 if (bfd_link_dll (info))
4643 info->flags |= DF_STATIC_TLS;
4646 case R_PPC64_DTPMOD64:
4647 if (rel + 1 < rel_end
4648 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4649 && rel[1].r_offset == rel->r_offset + 8)
4650 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4652 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4655 case R_PPC64_DTPREL64:
4656 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4658 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4659 && rel[-1].r_offset == rel->r_offset - 8)
4660 /* This is the second reloc of a dtpmod, dtprel pair.
4661 Don't mark with TLS_DTPREL. */
4665 sec->has_tls_reloc = 1;
4668 struct ppc_link_hash_entry *eh;
4669 eh = (struct ppc_link_hash_entry *) h;
4670 eh->tls_mask |= tls_type;
4673 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4674 rel->r_addend, tls_type))
4677 ppc64_sec = ppc64_elf_section_data (sec);
4678 if (ppc64_sec->sec_type != sec_toc)
4682 /* One extra to simplify get_tls_mask. */
4683 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
4684 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
4685 if (ppc64_sec->u.toc.symndx == NULL)
4687 amt = sec->size * sizeof (bfd_vma) / 8;
4688 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
4689 if (ppc64_sec->u.toc.add == NULL)
4691 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4692 ppc64_sec->sec_type = sec_toc;
4694 BFD_ASSERT (rel->r_offset % 8 == 0);
4695 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
4696 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
4698 /* Mark the second slot of a GD or LD entry.
4699 -1 to indicate GD and -2 to indicate LD. */
4700 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4701 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
4702 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4703 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
4706 case R_PPC64_TPREL16:
4707 case R_PPC64_TPREL16_LO:
4708 case R_PPC64_TPREL16_HI:
4709 case R_PPC64_TPREL16_HA:
4710 case R_PPC64_TPREL16_DS:
4711 case R_PPC64_TPREL16_LO_DS:
4712 case R_PPC64_TPREL16_HIGH:
4713 case R_PPC64_TPREL16_HIGHA:
4714 case R_PPC64_TPREL16_HIGHER:
4715 case R_PPC64_TPREL16_HIGHERA:
4716 case R_PPC64_TPREL16_HIGHEST:
4717 case R_PPC64_TPREL16_HIGHESTA:
4718 if (bfd_link_dll (info))
4719 info->flags |= DF_STATIC_TLS;
4722 case R_PPC64_ADDR64:
4724 && rel + 1 < rel_end
4725 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4728 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4732 case R_PPC64_ADDR16:
4733 case R_PPC64_ADDR16_DS:
4734 case R_PPC64_ADDR16_HA:
4735 case R_PPC64_ADDR16_HI:
4736 case R_PPC64_ADDR16_HIGH:
4737 case R_PPC64_ADDR16_HIGHA:
4738 case R_PPC64_ADDR16_HIGHER:
4739 case R_PPC64_ADDR16_HIGHERA:
4740 case R_PPC64_ADDR16_HIGHEST:
4741 case R_PPC64_ADDR16_HIGHESTA:
4742 case R_PPC64_ADDR16_LO:
4743 case R_PPC64_ADDR16_LO_DS:
4744 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
4745 && rel->r_addend == 0)
4747 /* We may need a .plt entry if this reloc refers to a
4748 function in a shared lib. */
4749 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
4751 h->pointer_equality_needed = 1;
4758 case R_PPC64_ADDR32:
4759 case R_PPC64_UADDR16:
4760 case R_PPC64_UADDR32:
4761 case R_PPC64_UADDR64:
4763 if (h != NULL && !bfd_link_pic (info))
4764 /* We may need a copy reloc. */
4767 /* Don't propagate .opd relocs. */
4768 if (NO_OPD_RELOCS && is_opd)
4771 /* If we are creating a shared library, and this is a reloc
4772 against a global symbol, or a non PC relative reloc
4773 against a local symbol, then we need to copy the reloc
4774 into the shared library. However, if we are linking with
4775 -Bsymbolic, we do not need to copy a reloc against a
4776 global symbol which is defined in an object we are
4777 including in the link (i.e., DEF_REGULAR is set). At
4778 this point we have not seen all the input files, so it is
4779 possible that DEF_REGULAR is not set now but will be set
4780 later (it is never cleared). In case of a weak definition,
4781 DEF_REGULAR may be cleared later by a strong definition in
4782 a shared library. We account for that possibility below by
4783 storing information in the dyn_relocs field of the hash
4784 table entry. A similar situation occurs when creating
4785 shared libraries and symbol visibility changes render the
4788 If on the other hand, we are creating an executable, we
4789 may need to keep relocations for symbols satisfied by a
4790 dynamic library if we manage to avoid copy relocs for the
4793 if ((bfd_link_pic (info)
4794 && (must_be_dyn_reloc (info, r_type)
4796 && (!SYMBOLIC_BIND (info, h)
4797 || h->root.type == bfd_link_hash_defweak
4798 || !h->def_regular))))
4799 || (ELIMINATE_COPY_RELOCS
4800 && !bfd_link_pic (info)
4802 && (h->root.type == bfd_link_hash_defweak
4803 || !h->def_regular))
4804 || (!bfd_link_pic (info)
4807 /* We must copy these reloc types into the output file.
4808 Create a reloc section in dynobj and make room for
4812 sreloc = _bfd_elf_make_dynamic_reloc_section
4813 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
4819 /* If this is a global symbol, we count the number of
4820 relocations we need for this symbol. */
4823 struct elf_dyn_relocs *p;
4824 struct elf_dyn_relocs **head;
4826 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4828 if (p == NULL || p->sec != sec)
4830 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4840 if (!must_be_dyn_reloc (info, r_type))
4845 /* Track dynamic relocs needed for local syms too.
4846 We really need local syms available to do this
4848 struct ppc_dyn_relocs *p;
4849 struct ppc_dyn_relocs **head;
4850 bfd_boolean is_ifunc;
4853 Elf_Internal_Sym *isym;
4855 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4860 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4864 vpp = &elf_section_data (s)->local_dynrel;
4865 head = (struct ppc_dyn_relocs **) vpp;
4866 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4868 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4870 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4872 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4878 p->ifunc = is_ifunc;
4894 /* Merge backend specific data from an object file to the output
4895 object file when linking. */
4898 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4900 bfd *obfd = info->output_bfd;
4901 unsigned long iflags, oflags;
4903 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
4906 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
4909 if (!_bfd_generic_verify_endian_match (ibfd, info))
4912 iflags = elf_elfheader (ibfd)->e_flags;
4913 oflags = elf_elfheader (obfd)->e_flags;
4915 if (iflags & ~EF_PPC64_ABI)
4918 /* xgettext:c-format */
4919 (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags);
4920 bfd_set_error (bfd_error_bad_value);
4923 else if (iflags != oflags && iflags != 0)
4926 /* xgettext:c-format */
4927 (_("%pB: ABI version %ld is not compatible with ABI version %ld output"),
4928 ibfd, iflags, oflags);
4929 bfd_set_error (bfd_error_bad_value);
4933 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
4936 /* Merge Tag_compatibility attributes and any common GNU ones. */
4937 return _bfd_elf_merge_object_attributes (ibfd, info);
4941 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
4943 /* Print normal ELF private data. */
4944 _bfd_elf_print_private_bfd_data (abfd, ptr);
4946 if (elf_elfheader (abfd)->e_flags != 0)
4950 fprintf (file, _("private flags = 0x%lx:"),
4951 elf_elfheader (abfd)->e_flags);
4953 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
4954 fprintf (file, _(" [abiv%ld]"),
4955 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
4962 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4963 of the code entry point, and its section, which must be in the same
4964 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
4967 opd_entry_value (asection *opd_sec,
4969 asection **code_sec,
4971 bfd_boolean in_code_sec)
4973 bfd *opd_bfd = opd_sec->owner;
4974 Elf_Internal_Rela *relocs;
4975 Elf_Internal_Rela *lo, *hi, *look;
4978 /* No relocs implies we are linking a --just-symbols object, or looking
4979 at a final linked executable with addr2line or somesuch. */
4980 if (opd_sec->reloc_count == 0)
4982 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
4984 if (contents == NULL)
4986 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
4987 return (bfd_vma) -1;
4988 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
4991 /* PR 17512: file: 64b9dfbb. */
4992 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
4993 return (bfd_vma) -1;
4995 val = bfd_get_64 (opd_bfd, contents + offset);
4996 if (code_sec != NULL)
4998 asection *sec, *likely = NULL;
5004 && val < sec->vma + sec->size)
5010 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5012 && (sec->flags & SEC_LOAD) != 0
5013 && (sec->flags & SEC_ALLOC) != 0)
5018 if (code_off != NULL)
5019 *code_off = val - likely->vma;
5025 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5027 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5029 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5030 /* PR 17512: file: df8e1fd6. */
5032 return (bfd_vma) -1;
5034 /* Go find the opd reloc at the sym address. */
5036 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5040 look = lo + (hi - lo) / 2;
5041 if (look->r_offset < offset)
5043 else if (look->r_offset > offset)
5047 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5049 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5050 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5052 unsigned long symndx = ELF64_R_SYM (look->r_info);
5053 asection *sec = NULL;
5055 if (symndx >= symtab_hdr->sh_info
5056 && elf_sym_hashes (opd_bfd) != NULL)
5058 struct elf_link_hash_entry **sym_hashes;
5059 struct elf_link_hash_entry *rh;
5061 sym_hashes = elf_sym_hashes (opd_bfd);
5062 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5065 rh = elf_follow_link (rh);
5066 if (rh->root.type != bfd_link_hash_defined
5067 && rh->root.type != bfd_link_hash_defweak)
5069 if (rh->root.u.def.section->owner == opd_bfd)
5071 val = rh->root.u.def.value;
5072 sec = rh->root.u.def.section;
5079 Elf_Internal_Sym *sym;
5081 if (symndx < symtab_hdr->sh_info)
5083 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5086 size_t symcnt = symtab_hdr->sh_info;
5087 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5092 symtab_hdr->contents = (bfd_byte *) sym;
5098 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5104 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5107 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5108 val = sym->st_value;
5111 val += look->r_addend;
5112 if (code_off != NULL)
5114 if (code_sec != NULL)
5116 if (in_code_sec && *code_sec != sec)
5121 if (sec->output_section != NULL)
5122 val += sec->output_section->vma + sec->output_offset;
5131 /* If the ELF symbol SYM might be a function in SEC, return the
5132 function size and set *CODE_OFF to the function's entry point,
5133 otherwise return zero. */
5135 static bfd_size_type
5136 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5141 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5142 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5146 if (!(sym->flags & BSF_SYNTHETIC))
5147 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5149 if (strcmp (sym->section->name, ".opd") == 0)
5151 struct _opd_sec_data *opd = get_opd_info (sym->section);
5152 bfd_vma symval = sym->value;
5155 && opd->adjust != NULL
5156 && elf_section_data (sym->section)->relocs != NULL)
5158 /* opd_entry_value will use cached relocs that have been
5159 adjusted, but with raw symbols. That means both local
5160 and global symbols need adjusting. */
5161 long adjust = opd->adjust[OPD_NDX (symval)];
5167 if (opd_entry_value (sym->section, symval,
5168 &sec, code_off, TRUE) == (bfd_vma) -1)
5170 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5171 symbol. This size has nothing to do with the code size of the
5172 function, which is what we're supposed to return, but the
5173 code size isn't available without looking up the dot-sym.
5174 However, doing that would be a waste of time particularly
5175 since elf_find_function will look at the dot-sym anyway.
5176 Now, elf_find_function will keep the largest size of any
5177 function sym found at the code address of interest, so return
5178 1 here to avoid it incorrectly caching a larger function size
5179 for a small function. This does mean we return the wrong
5180 size for a new-ABI function of size 24, but all that does is
5181 disable caching for such functions. */
5187 if (sym->section != sec)
5189 *code_off = sym->value;
5196 /* Return true if symbol is a strong function defined in an ELFv2
5197 object with st_other localentry bits of zero, ie. its local entry
5198 point coincides with its global entry point. */
5201 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
5204 && h->type == STT_FUNC
5205 && h->root.type == bfd_link_hash_defined
5206 && (STO_PPC64_LOCAL_MASK & h->other) == 0
5207 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
5208 && is_ppc64_elf (h->root.u.def.section->owner)
5209 && abiversion (h->root.u.def.section->owner) >= 2);
5212 /* Return true if symbol is defined in a regular object file. */
5215 is_static_defined (struct elf_link_hash_entry *h)
5217 return ((h->root.type == bfd_link_hash_defined
5218 || h->root.type == bfd_link_hash_defweak)
5219 && h->root.u.def.section != NULL
5220 && h->root.u.def.section->output_section != NULL);
5223 /* If FDH is a function descriptor symbol, return the associated code
5224 entry symbol if it is defined. Return NULL otherwise. */
5226 static struct ppc_link_hash_entry *
5227 defined_code_entry (struct ppc_link_hash_entry *fdh)
5229 if (fdh->is_func_descriptor)
5231 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5232 if (fh->elf.root.type == bfd_link_hash_defined
5233 || fh->elf.root.type == bfd_link_hash_defweak)
5239 /* If FH is a function code entry symbol, return the associated
5240 function descriptor symbol if it is defined. Return NULL otherwise. */
5242 static struct ppc_link_hash_entry *
5243 defined_func_desc (struct ppc_link_hash_entry *fh)
5246 && fh->oh->is_func_descriptor)
5248 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5249 if (fdh->elf.root.type == bfd_link_hash_defined
5250 || fdh->elf.root.type == bfd_link_hash_defweak)
5256 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
5258 /* Garbage collect sections, after first dealing with dot-symbols. */
5261 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
5263 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5265 if (htab != NULL && htab->need_func_desc_adj)
5267 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5268 htab->need_func_desc_adj = 0;
5270 return bfd_elf_gc_sections (abfd, info);
5273 /* Mark all our entry sym sections, both opd and code section. */
5276 ppc64_elf_gc_keep (struct bfd_link_info *info)
5278 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5279 struct bfd_sym_chain *sym;
5284 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5286 struct ppc_link_hash_entry *eh, *fh;
5289 eh = (struct ppc_link_hash_entry *)
5290 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5293 if (eh->elf.root.type != bfd_link_hash_defined
5294 && eh->elf.root.type != bfd_link_hash_defweak)
5297 fh = defined_code_entry (eh);
5300 sec = fh->elf.root.u.def.section;
5301 sec->flags |= SEC_KEEP;
5303 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5304 && opd_entry_value (eh->elf.root.u.def.section,
5305 eh->elf.root.u.def.value,
5306 &sec, NULL, FALSE) != (bfd_vma) -1)
5307 sec->flags |= SEC_KEEP;
5309 sec = eh->elf.root.u.def.section;
5310 sec->flags |= SEC_KEEP;
5314 /* Mark sections containing dynamically referenced symbols. When
5315 building shared libraries, we must assume that any visible symbol is
5319 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5321 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5322 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5323 struct ppc_link_hash_entry *fdh;
5324 struct bfd_elf_dynamic_list *d = info->dynamic_list;
5326 /* Dynamic linking info is on the func descriptor sym. */
5327 fdh = defined_func_desc (eh);
5331 if ((eh->elf.root.type == bfd_link_hash_defined
5332 || eh->elf.root.type == bfd_link_hash_defweak)
5333 && ((eh->elf.ref_dynamic && !eh->elf.forced_local)
5334 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
5335 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5336 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5337 && (!bfd_link_executable (info)
5338 || info->gc_keep_exported
5339 || info->export_dynamic
5342 && (*d->match) (&d->head, NULL,
5343 eh->elf.root.root.string)))
5344 && (eh->elf.versioned >= versioned
5345 || !bfd_hide_sym_by_version (info->version_info,
5346 eh->elf.root.root.string)))))
5349 struct ppc_link_hash_entry *fh;
5351 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5353 /* Function descriptor syms cause the associated
5354 function code sym section to be marked. */
5355 fh = defined_code_entry (eh);
5358 code_sec = fh->elf.root.u.def.section;
5359 code_sec->flags |= SEC_KEEP;
5361 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5362 && opd_entry_value (eh->elf.root.u.def.section,
5363 eh->elf.root.u.def.value,
5364 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5365 code_sec->flags |= SEC_KEEP;
5371 /* Return the section that should be marked against GC for a given
5375 ppc64_elf_gc_mark_hook (asection *sec,
5376 struct bfd_link_info *info,
5377 Elf_Internal_Rela *rel,
5378 struct elf_link_hash_entry *h,
5379 Elf_Internal_Sym *sym)
5383 /* Syms return NULL if we're marking .opd, so we avoid marking all
5384 function sections, as all functions are referenced in .opd. */
5386 if (get_opd_info (sec) != NULL)
5391 enum elf_ppc64_reloc_type r_type;
5392 struct ppc_link_hash_entry *eh, *fh, *fdh;
5394 r_type = ELF64_R_TYPE (rel->r_info);
5397 case R_PPC64_GNU_VTINHERIT:
5398 case R_PPC64_GNU_VTENTRY:
5402 switch (h->root.type)
5404 case bfd_link_hash_defined:
5405 case bfd_link_hash_defweak:
5406 eh = (struct ppc_link_hash_entry *) h;
5407 fdh = defined_func_desc (eh);
5410 /* -mcall-aixdesc code references the dot-symbol on
5411 a call reloc. Mark the function descriptor too
5412 against garbage collection. */
5414 if (fdh->elf.is_weakalias)
5415 weakdef (&fdh->elf)->mark = 1;
5419 /* Function descriptor syms cause the associated
5420 function code sym section to be marked. */
5421 fh = defined_code_entry (eh);
5424 /* They also mark their opd section. */
5425 eh->elf.root.u.def.section->gc_mark = 1;
5427 rsec = fh->elf.root.u.def.section;
5429 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5430 && opd_entry_value (eh->elf.root.u.def.section,
5431 eh->elf.root.u.def.value,
5432 &rsec, NULL, FALSE) != (bfd_vma) -1)
5433 eh->elf.root.u.def.section->gc_mark = 1;
5435 rsec = h->root.u.def.section;
5438 case bfd_link_hash_common:
5439 rsec = h->root.u.c.p->section;
5443 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5449 struct _opd_sec_data *opd;
5451 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5452 opd = get_opd_info (rsec);
5453 if (opd != NULL && opd->func_sec != NULL)
5457 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
5464 /* The maximum size of .sfpr. */
5465 #define SFPR_MAX (218*4)
5467 struct sfpr_def_parms
5469 const char name[12];
5470 unsigned char lo, hi;
5471 bfd_byte *(*write_ent) (bfd *, bfd_byte *, int);
5472 bfd_byte *(*write_tail) (bfd *, bfd_byte *, int);
5475 /* Auto-generate _save*, _rest* functions in .sfpr.
5476 If STUB_SEC is non-null, define alias symbols in STUB_SEC
5480 sfpr_define (struct bfd_link_info *info,
5481 const struct sfpr_def_parms *parm,
5484 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5486 size_t len = strlen (parm->name);
5487 bfd_boolean writing = FALSE;
5493 memcpy (sym, parm->name, len);
5496 for (i = parm->lo; i <= parm->hi; i++)
5498 struct ppc_link_hash_entry *h;
5500 sym[len + 0] = i / 10 + '0';
5501 sym[len + 1] = i % 10 + '0';
5502 h = (struct ppc_link_hash_entry *)
5503 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
5504 if (stub_sec != NULL)
5507 && h->elf.root.type == bfd_link_hash_defined
5508 && h->elf.root.u.def.section == htab->sfpr)
5510 struct elf_link_hash_entry *s;
5512 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
5513 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
5516 if (s->root.type == bfd_link_hash_new
5517 || (s->root.type = bfd_link_hash_defined
5518 && s->root.u.def.section == stub_sec))
5520 s->root.type = bfd_link_hash_defined;
5521 s->root.u.def.section = stub_sec;
5522 s->root.u.def.value = (stub_sec->size - htab->sfpr->size
5523 + h->elf.root.u.def.value);
5526 s->ref_regular_nonweak = 1;
5527 s->forced_local = 1;
5529 s->root.linker_def = 1;
5537 if (!h->elf.def_regular)
5539 h->elf.root.type = bfd_link_hash_defined;
5540 h->elf.root.u.def.section = htab->sfpr;
5541 h->elf.root.u.def.value = htab->sfpr->size;
5542 h->elf.type = STT_FUNC;
5543 h->elf.def_regular = 1;
5545 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
5547 if (htab->sfpr->contents == NULL)
5549 htab->sfpr->contents
5550 = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5551 if (htab->sfpr->contents == NULL)
5558 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5560 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5562 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5563 htab->sfpr->size = p - htab->sfpr->contents;
5571 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5573 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5578 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5580 p = savegpr0 (abfd, p, r);
5581 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
5583 bfd_put_32 (abfd, BLR, p);
5588 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5590 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5595 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5597 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
5599 p = restgpr0 (abfd, p, r);
5600 bfd_put_32 (abfd, MTLR_R0, p);
5604 p = restgpr0 (abfd, p, 30);
5605 p = restgpr0 (abfd, p, 31);
5607 bfd_put_32 (abfd, BLR, p);
5612 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5614 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5619 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5621 p = savegpr1 (abfd, p, r);
5622 bfd_put_32 (abfd, BLR, p);
5627 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5629 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5634 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5636 p = restgpr1 (abfd, p, r);
5637 bfd_put_32 (abfd, BLR, p);
5642 savefpr (bfd *abfd, bfd_byte *p, int r)
5644 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5649 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5651 p = savefpr (abfd, p, r);
5652 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
5654 bfd_put_32 (abfd, BLR, p);
5659 restfpr (bfd *abfd, bfd_byte *p, int r)
5661 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5666 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5668 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
5670 p = restfpr (abfd, p, r);
5671 bfd_put_32 (abfd, MTLR_R0, p);
5675 p = restfpr (abfd, p, 30);
5676 p = restfpr (abfd, p, 31);
5678 bfd_put_32 (abfd, BLR, p);
5683 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5685 p = savefpr (abfd, p, r);
5686 bfd_put_32 (abfd, BLR, p);
5691 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5693 p = restfpr (abfd, p, r);
5694 bfd_put_32 (abfd, BLR, p);
5699 savevr (bfd *abfd, bfd_byte *p, int r)
5701 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5703 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5708 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5710 p = savevr (abfd, p, r);
5711 bfd_put_32 (abfd, BLR, p);
5716 restvr (bfd *abfd, bfd_byte *p, int r)
5718 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5720 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5725 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5727 p = restvr (abfd, p, r);
5728 bfd_put_32 (abfd, BLR, p);
5732 /* Called via elf_link_hash_traverse to transfer dynamic linking
5733 information on function code symbol entries to their corresponding
5734 function descriptor symbol entries. */
5737 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5739 struct bfd_link_info *info;
5740 struct ppc_link_hash_table *htab;
5741 struct ppc_link_hash_entry *fh;
5742 struct ppc_link_hash_entry *fdh;
5743 bfd_boolean force_local;
5745 fh = (struct ppc_link_hash_entry *) h;
5746 if (fh->elf.root.type == bfd_link_hash_indirect)
5752 if (fh->elf.root.root.string[0] != '.'
5753 || fh->elf.root.root.string[1] == '\0')
5757 htab = ppc_hash_table (info);
5761 /* Find the corresponding function descriptor symbol. */
5762 fdh = lookup_fdh (fh, htab);
5764 /* Resolve undefined references to dot-symbols as the value
5765 in the function descriptor, if we have one in a regular object.
5766 This is to satisfy cases like ".quad .foo". Calls to functions
5767 in dynamic objects are handled elsewhere. */
5768 if ((fh->elf.root.type == bfd_link_hash_undefined
5769 || fh->elf.root.type == bfd_link_hash_undefweak)
5770 && (fdh->elf.root.type == bfd_link_hash_defined
5771 || fdh->elf.root.type == bfd_link_hash_defweak)
5772 && get_opd_info (fdh->elf.root.u.def.section) != NULL
5773 && opd_entry_value (fdh->elf.root.u.def.section,
5774 fdh->elf.root.u.def.value,
5775 &fh->elf.root.u.def.section,
5776 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
5778 fh->elf.root.type = fdh->elf.root.type;
5779 fh->elf.forced_local = 1;
5780 fh->elf.def_regular = fdh->elf.def_regular;
5781 fh->elf.def_dynamic = fdh->elf.def_dynamic;
5784 if (!fh->elf.dynamic)
5786 struct plt_entry *ent;
5788 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5789 if (ent->plt.refcount > 0)
5795 /* Create a descriptor as undefined if necessary. */
5797 && !bfd_link_executable (info)
5798 && (fh->elf.root.type == bfd_link_hash_undefined
5799 || fh->elf.root.type == bfd_link_hash_undefweak))
5801 fdh = make_fdh (info, fh);
5806 /* We can't support overriding of symbols on a fake descriptor. */
5809 && (fh->elf.root.type == bfd_link_hash_defined
5810 || fh->elf.root.type == bfd_link_hash_defweak))
5811 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5813 /* Transfer dynamic linking information to the function descriptor. */
5816 fdh->elf.ref_regular |= fh->elf.ref_regular;
5817 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5818 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5819 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5820 fdh->elf.dynamic |= fh->elf.dynamic;
5821 fdh->elf.needs_plt |= (fh->elf.needs_plt
5822 || fh->elf.type == STT_FUNC
5823 || fh->elf.type == STT_GNU_IFUNC);
5824 move_plt_plist (fh, fdh);
5826 if (!fdh->elf.forced_local
5827 && fh->elf.dynindx != -1)
5828 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5832 /* Now that the info is on the function descriptor, clear the
5833 function code sym info. Any function code syms for which we
5834 don't have a definition in a regular file, we force local.
5835 This prevents a shared library from exporting syms that have
5836 been imported from another library. Function code syms that
5837 are really in the library we must leave global to prevent the
5838 linker dragging in a definition from a static library. */
5839 force_local = (!fh->elf.def_regular
5841 || !fdh->elf.def_regular
5842 || fdh->elf.forced_local);
5843 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5848 static const struct sfpr_def_parms save_res_funcs[] =
5850 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5851 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5852 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5853 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5854 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5855 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5856 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5857 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5858 { "._savef", 14, 31, savefpr, savefpr1_tail },
5859 { "._restf", 14, 31, restfpr, restfpr1_tail },
5860 { "_savevr_", 20, 31, savevr, savevr_tail },
5861 { "_restvr_", 20, 31, restvr, restvr_tail }
5864 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5865 this hook to a) provide some gcc support functions, and b) transfer
5866 dynamic linking information gathered so far on function code symbol
5867 entries, to their corresponding function descriptor symbol entries. */
5870 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5871 struct bfd_link_info *info)
5873 struct ppc_link_hash_table *htab;
5875 htab = ppc_hash_table (info);
5879 /* Provide any missing _save* and _rest* functions. */
5880 if (htab->sfpr != NULL)
5884 htab->sfpr->size = 0;
5885 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
5886 if (!sfpr_define (info, &save_res_funcs[i], NULL))
5888 if (htab->sfpr->size == 0)
5889 htab->sfpr->flags |= SEC_EXCLUDE;
5892 if (bfd_link_relocatable (info))
5895 if (htab->elf.hgot != NULL)
5897 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
5898 /* Make .TOC. defined so as to prevent it being made dynamic.
5899 The wrong value here is fixed later in ppc64_elf_set_toc. */
5900 if (!htab->elf.hgot->def_regular
5901 || htab->elf.hgot->root.type != bfd_link_hash_defined)
5903 htab->elf.hgot->root.type = bfd_link_hash_defined;
5904 htab->elf.hgot->root.u.def.value = 0;
5905 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
5906 htab->elf.hgot->def_regular = 1;
5907 htab->elf.hgot->root.linker_def = 1;
5909 htab->elf.hgot->type = STT_OBJECT;
5910 htab->elf.hgot->other
5911 = (htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
5914 if (htab->need_func_desc_adj)
5916 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5917 htab->need_func_desc_adj = 0;
5923 /* Find dynamic relocs for H that apply to read-only sections. */
5926 readonly_dynrelocs (struct elf_link_hash_entry *h)
5928 struct ppc_link_hash_entry *eh;
5929 struct elf_dyn_relocs *p;
5931 eh = (struct ppc_link_hash_entry *) h;
5932 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5934 asection *s = p->sec->output_section;
5936 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5942 /* Return true if we have dynamic relocs against H or any of its weak
5943 aliases, that apply to read-only sections. Cannot be used after
5944 size_dynamic_sections. */
5947 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5949 struct ppc_link_hash_entry *eh;
5951 eh = (struct ppc_link_hash_entry *) h;
5954 if (readonly_dynrelocs (&eh->elf))
5956 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
5958 while (eh != NULL && &eh->elf != h);
5963 /* Return whether EH has pc-relative dynamic relocs. */
5966 pc_dynrelocs (struct ppc_link_hash_entry *eh)
5968 struct elf_dyn_relocs *p;
5970 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5971 if (p->pc_count != 0)
5976 /* Return true if a global entry stub will be created for H. Valid
5977 for ELFv2 before plt entries have been allocated. */
5980 global_entry_stub (struct elf_link_hash_entry *h)
5982 struct plt_entry *pent;
5984 if (!h->pointer_equality_needed
5988 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5989 if (pent->plt.refcount > 0
5990 && pent->addend == 0)
5996 /* Adjust a symbol defined by a dynamic object and referenced by a
5997 regular object. The current definition is in some section of the
5998 dynamic object, but we're not including those sections. We have to
5999 change the definition to something the rest of the link can
6003 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6004 struct elf_link_hash_entry *h)
6006 struct ppc_link_hash_table *htab;
6009 htab = ppc_hash_table (info);
6013 /* Deal with function syms. */
6014 if (h->type == STT_FUNC
6015 || h->type == STT_GNU_IFUNC
6018 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
6019 || SYMBOL_CALLS_LOCAL (info, h)
6020 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
6021 /* Discard dyn_relocs when non-pic if we've decided that a
6022 function symbol is local and not an ifunc. We keep dynamic
6023 relocs for ifuncs when local rather than always emitting a
6024 plt call stub for them and defining the symbol on the call
6025 stub. We can't do that for ELFv1 anyway (a function symbol
6026 is defined on a descriptor, not code) and it can be faster at
6027 run-time due to not needing to bounce through a stub. The
6028 dyn_relocs for ifuncs will be applied even in a static
6030 if (!bfd_link_pic (info)
6031 && h->type != STT_GNU_IFUNC
6033 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
6035 /* Clear procedure linkage table information for any symbol that
6036 won't need a .plt entry. */
6037 struct plt_entry *ent;
6038 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6039 if (ent->plt.refcount > 0)
6042 || (h->type != STT_GNU_IFUNC
6044 && (htab->can_convert_all_inline_plt
6045 || (((struct ppc_link_hash_entry *) h)->tls_mask
6046 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
6048 h->plt.plist = NULL;
6050 h->pointer_equality_needed = 0;
6052 else if (abiversion (info->output_bfd) >= 2)
6054 /* Taking a function's address in a read/write section
6055 doesn't require us to define the function symbol in the
6056 executable on a global entry stub. A dynamic reloc can
6057 be used instead. The reason we prefer a few more dynamic
6058 relocs is that calling via a global entry stub costs a
6059 few more instructions, and pointer_equality_needed causes
6060 extra work in ld.so when resolving these symbols. */
6061 if (global_entry_stub (h))
6063 if (!readonly_dynrelocs (h))
6065 h->pointer_equality_needed = 0;
6066 /* If we haven't seen a branch reloc and the symbol
6067 isn't an ifunc then we don't need a plt entry. */
6069 h->plt.plist = NULL;
6071 else if (!bfd_link_pic (info))
6072 /* We are going to be defining the function symbol on the
6073 plt stub, so no dyn_relocs needed when non-pic. */
6074 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
6077 /* ELFv2 function symbols can't have copy relocs. */
6080 else if (!h->needs_plt
6081 && !readonly_dynrelocs (h))
6083 /* If we haven't seen a branch reloc and the symbol isn't an
6084 ifunc then we don't need a plt entry. */
6085 h->plt.plist = NULL;
6086 h->pointer_equality_needed = 0;
6091 h->plt.plist = NULL;
6093 /* If this is a weak symbol, and there is a real definition, the
6094 processor independent code will have arranged for us to see the
6095 real definition first, and we can just use the same value. */
6096 if (h->is_weakalias)
6098 struct elf_link_hash_entry *def = weakdef (h);
6099 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
6100 h->root.u.def.section = def->root.u.def.section;
6101 h->root.u.def.value = def->root.u.def.value;
6102 if (def->root.u.def.section == htab->elf.sdynbss
6103 || def->root.u.def.section == htab->elf.sdynrelro)
6104 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
6108 /* If we are creating a shared library, we must presume that the
6109 only references to the symbol are via the global offset table.
6110 For such cases we need not do anything here; the relocations will
6111 be handled correctly by relocate_section. */
6112 if (bfd_link_pic (info))
6115 /* If there are no references to this symbol that do not use the
6116 GOT, we don't need to generate a copy reloc. */
6117 if (!h->non_got_ref)
6120 /* Don't generate a copy reloc for symbols defined in the executable. */
6121 if (!h->def_dynamic || !h->ref_regular || h->def_regular
6123 /* If -z nocopyreloc was given, don't generate them either. */
6124 || info->nocopyreloc
6126 /* If we don't find any dynamic relocs in read-only sections, then
6127 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6128 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
6130 /* Protected variables do not work with .dynbss. The copy in
6131 .dynbss won't be used by the shared library with the protected
6132 definition for the variable. Text relocations are preferable
6133 to an incorrect program. */
6134 || h->protected_def)
6137 if (h->plt.plist != NULL)
6139 /* We should never get here, but unfortunately there are versions
6140 of gcc out there that improperly (for this ABI) put initialized
6141 function pointers, vtable refs and suchlike in read-only
6142 sections. Allow them to proceed, but warn that this might
6143 break at runtime. */
6144 info->callbacks->einfo
6145 (_("%P: copy reloc against `%pT' requires lazy plt linking; "
6146 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6147 h->root.root.string);
6150 /* This is a reference to a symbol defined by a dynamic object which
6151 is not a function. */
6153 /* We must allocate the symbol in our .dynbss section, which will
6154 become part of the .bss section of the executable. There will be
6155 an entry for this symbol in the .dynsym section. The dynamic
6156 object will contain position independent code, so all references
6157 from the dynamic object to this symbol will go through the global
6158 offset table. The dynamic linker will use the .dynsym entry to
6159 determine the address it must put in the global offset table, so
6160 both the dynamic object and the regular object will refer to the
6161 same memory location for the variable. */
6162 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6164 s = htab->elf.sdynrelro;
6165 srel = htab->elf.sreldynrelro;
6169 s = htab->elf.sdynbss;
6170 srel = htab->elf.srelbss;
6172 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6174 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
6175 linker to copy the initial value out of the dynamic object
6176 and into the runtime process image. */
6177 srel->size += sizeof (Elf64_External_Rela);
6181 /* We no longer want dyn_relocs. */
6182 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
6183 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6186 /* If given a function descriptor symbol, hide both the function code
6187 sym and the descriptor. */
6189 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6190 struct elf_link_hash_entry *h,
6191 bfd_boolean force_local)
6193 struct ppc_link_hash_entry *eh;
6194 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6196 eh = (struct ppc_link_hash_entry *) h;
6197 if (eh->is_func_descriptor)
6199 struct ppc_link_hash_entry *fh = eh->oh;
6204 struct elf_link_hash_table *htab = elf_hash_table (info);
6207 /* We aren't supposed to use alloca in BFD because on
6208 systems which do not have alloca the version in libiberty
6209 calls xmalloc, which might cause the program to crash
6210 when it runs out of memory. This function doesn't have a
6211 return status, so there's no way to gracefully return an
6212 error. So cheat. We know that string[-1] can be safely
6213 accessed; It's either a string in an ELF string table,
6214 or allocated in an objalloc structure. */
6216 p = eh->elf.root.root.string - 1;
6219 fh = (struct ppc_link_hash_entry *)
6220 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
6223 /* Unfortunately, if it so happens that the string we were
6224 looking for was allocated immediately before this string,
6225 then we overwrote the string terminator. That's the only
6226 reason the lookup should fail. */
6229 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6230 while (q >= eh->elf.root.root.string && *q == *p)
6232 if (q < eh->elf.root.root.string && *p == '.')
6233 fh = (struct ppc_link_hash_entry *)
6234 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
6243 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6248 get_sym_h (struct elf_link_hash_entry **hp,
6249 Elf_Internal_Sym **symp,
6251 unsigned char **tls_maskp,
6252 Elf_Internal_Sym **locsymsp,
6253 unsigned long r_symndx,
6256 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6258 if (r_symndx >= symtab_hdr->sh_info)
6260 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6261 struct elf_link_hash_entry *h;
6263 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6264 h = elf_follow_link (h);
6272 if (symsecp != NULL)
6274 asection *symsec = NULL;
6275 if (h->root.type == bfd_link_hash_defined
6276 || h->root.type == bfd_link_hash_defweak)
6277 symsec = h->root.u.def.section;
6281 if (tls_maskp != NULL)
6283 struct ppc_link_hash_entry *eh;
6285 eh = (struct ppc_link_hash_entry *) h;
6286 *tls_maskp = &eh->tls_mask;
6291 Elf_Internal_Sym *sym;
6292 Elf_Internal_Sym *locsyms = *locsymsp;
6294 if (locsyms == NULL)
6296 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6297 if (locsyms == NULL)
6298 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6299 symtab_hdr->sh_info,
6300 0, NULL, NULL, NULL);
6301 if (locsyms == NULL)
6303 *locsymsp = locsyms;
6305 sym = locsyms + r_symndx;
6313 if (symsecp != NULL)
6314 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6316 if (tls_maskp != NULL)
6318 struct got_entry **lgot_ents;
6319 unsigned char *tls_mask;
6322 lgot_ents = elf_local_got_ents (ibfd);
6323 if (lgot_ents != NULL)
6325 struct plt_entry **local_plt = (struct plt_entry **)
6326 (lgot_ents + symtab_hdr->sh_info);
6327 unsigned char *lgot_masks = (unsigned char *)
6328 (local_plt + symtab_hdr->sh_info);
6329 tls_mask = &lgot_masks[r_symndx];
6331 *tls_maskp = tls_mask;
6337 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6338 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6339 type suitable for optimization, and 1 otherwise. */
6342 get_tls_mask (unsigned char **tls_maskp,
6343 unsigned long *toc_symndx,
6344 bfd_vma *toc_addend,
6345 Elf_Internal_Sym **locsymsp,
6346 const Elf_Internal_Rela *rel,
6349 unsigned long r_symndx;
6351 struct elf_link_hash_entry *h;
6352 Elf_Internal_Sym *sym;
6356 r_symndx = ELF64_R_SYM (rel->r_info);
6357 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6360 if ((*tls_maskp != NULL
6361 && (**tls_maskp & TLS_TLS) != 0
6362 && **tls_maskp != (TLS_TLS | TLS_MARK))
6364 || ppc64_elf_section_data (sec) == NULL
6365 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6368 /* Look inside a TOC section too. */
6371 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6372 off = h->root.u.def.value;
6375 off = sym->st_value;
6376 off += rel->r_addend;
6377 BFD_ASSERT (off % 8 == 0);
6378 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6379 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6380 if (toc_symndx != NULL)
6381 *toc_symndx = r_symndx;
6382 if (toc_addend != NULL)
6383 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6384 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6386 if ((h == NULL || is_static_defined (h))
6387 && (next_r == -1 || next_r == -2))
6392 /* Find (or create) an entry in the tocsave hash table. */
6394 static struct tocsave_entry *
6395 tocsave_find (struct ppc_link_hash_table *htab,
6396 enum insert_option insert,
6397 Elf_Internal_Sym **local_syms,
6398 const Elf_Internal_Rela *irela,
6401 unsigned long r_indx;
6402 struct elf_link_hash_entry *h;
6403 Elf_Internal_Sym *sym;
6404 struct tocsave_entry ent, *p;
6406 struct tocsave_entry **slot;
6408 r_indx = ELF64_R_SYM (irela->r_info);
6409 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6411 if (ent.sec == NULL || ent.sec->output_section == NULL)
6414 (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
6419 ent.offset = h->root.u.def.value;
6421 ent.offset = sym->st_value;
6422 ent.offset += irela->r_addend;
6424 hash = tocsave_htab_hash (&ent);
6425 slot = ((struct tocsave_entry **)
6426 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6432 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6441 /* Adjust all global syms defined in opd sections. In gcc generated
6442 code for the old ABI, these will already have been done. */
6445 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6447 struct ppc_link_hash_entry *eh;
6449 struct _opd_sec_data *opd;
6451 if (h->root.type == bfd_link_hash_indirect)
6454 if (h->root.type != bfd_link_hash_defined
6455 && h->root.type != bfd_link_hash_defweak)
6458 eh = (struct ppc_link_hash_entry *) h;
6459 if (eh->adjust_done)
6462 sym_sec = eh->elf.root.u.def.section;
6463 opd = get_opd_info (sym_sec);
6464 if (opd != NULL && opd->adjust != NULL)
6466 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
6469 /* This entry has been deleted. */
6470 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6473 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6474 if (discarded_section (dsec))
6476 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6480 eh->elf.root.u.def.value = 0;
6481 eh->elf.root.u.def.section = dsec;
6484 eh->elf.root.u.def.value += adjust;
6485 eh->adjust_done = 1;
6490 /* Handles decrementing dynamic reloc counts for the reloc specified by
6491 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
6492 have already been determined. */
6495 dec_dynrel_count (bfd_vma r_info,
6497 struct bfd_link_info *info,
6498 Elf_Internal_Sym **local_syms,
6499 struct elf_link_hash_entry *h,
6500 Elf_Internal_Sym *sym)
6502 enum elf_ppc64_reloc_type r_type;
6503 asection *sym_sec = NULL;
6505 /* Can this reloc be dynamic? This switch, and later tests here
6506 should be kept in sync with the code in check_relocs. */
6507 r_type = ELF64_R_TYPE (r_info);
6513 case R_PPC64_TPREL16:
6514 case R_PPC64_TPREL16_LO:
6515 case R_PPC64_TPREL16_HI:
6516 case R_PPC64_TPREL16_HA:
6517 case R_PPC64_TPREL16_DS:
6518 case R_PPC64_TPREL16_LO_DS:
6519 case R_PPC64_TPREL16_HIGH:
6520 case R_PPC64_TPREL16_HIGHA:
6521 case R_PPC64_TPREL16_HIGHER:
6522 case R_PPC64_TPREL16_HIGHERA:
6523 case R_PPC64_TPREL16_HIGHEST:
6524 case R_PPC64_TPREL16_HIGHESTA:
6525 case R_PPC64_TPREL64:
6526 case R_PPC64_DTPMOD64:
6527 case R_PPC64_DTPREL64:
6528 case R_PPC64_ADDR64:
6532 case R_PPC64_ADDR14:
6533 case R_PPC64_ADDR14_BRNTAKEN:
6534 case R_PPC64_ADDR14_BRTAKEN:
6535 case R_PPC64_ADDR16:
6536 case R_PPC64_ADDR16_DS:
6537 case R_PPC64_ADDR16_HA:
6538 case R_PPC64_ADDR16_HI:
6539 case R_PPC64_ADDR16_HIGH:
6540 case R_PPC64_ADDR16_HIGHA:
6541 case R_PPC64_ADDR16_HIGHER:
6542 case R_PPC64_ADDR16_HIGHERA:
6543 case R_PPC64_ADDR16_HIGHEST:
6544 case R_PPC64_ADDR16_HIGHESTA:
6545 case R_PPC64_ADDR16_LO:
6546 case R_PPC64_ADDR16_LO_DS:
6547 case R_PPC64_ADDR24:
6548 case R_PPC64_ADDR32:
6549 case R_PPC64_UADDR16:
6550 case R_PPC64_UADDR32:
6551 case R_PPC64_UADDR64:
6556 if (local_syms != NULL)
6558 unsigned long r_symndx;
6559 bfd *ibfd = sec->owner;
6561 r_symndx = ELF64_R_SYM (r_info);
6562 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6566 if ((bfd_link_pic (info)
6567 && (must_be_dyn_reloc (info, r_type)
6569 && (!SYMBOLIC_BIND (info, h)
6570 || h->root.type == bfd_link_hash_defweak
6571 || !h->def_regular))))
6572 || (ELIMINATE_COPY_RELOCS
6573 && !bfd_link_pic (info)
6575 && (h->root.type == bfd_link_hash_defweak
6576 || !h->def_regular)))
6583 struct elf_dyn_relocs *p;
6584 struct elf_dyn_relocs **pp;
6585 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6587 /* elf_gc_sweep may have already removed all dyn relocs associated
6588 with local syms for a given section. Also, symbol flags are
6589 changed by elf_gc_sweep_symbol, confusing the test above. Don't
6590 report a dynreloc miscount. */
6591 if (*pp == NULL && info->gc_sections)
6594 while ((p = *pp) != NULL)
6598 if (!must_be_dyn_reloc (info, r_type))
6610 struct ppc_dyn_relocs *p;
6611 struct ppc_dyn_relocs **pp;
6613 bfd_boolean is_ifunc;
6615 if (local_syms == NULL)
6616 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6617 if (sym_sec == NULL)
6620 vpp = &elf_section_data (sym_sec)->local_dynrel;
6621 pp = (struct ppc_dyn_relocs **) vpp;
6623 if (*pp == NULL && info->gc_sections)
6626 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
6627 while ((p = *pp) != NULL)
6629 if (p->sec == sec && p->ifunc == is_ifunc)
6640 /* xgettext:c-format */
6641 _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"),
6643 bfd_set_error (bfd_error_bad_value);
6647 /* Remove unused Official Procedure Descriptor entries. Currently we
6648 only remove those associated with functions in discarded link-once
6649 sections, or weakly defined functions that have been overridden. It
6650 would be possible to remove many more entries for statically linked
6654 ppc64_elf_edit_opd (struct bfd_link_info *info)
6657 bfd_boolean some_edited = FALSE;
6658 asection *need_pad = NULL;
6659 struct ppc_link_hash_table *htab;
6661 htab = ppc_hash_table (info);
6665 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6668 Elf_Internal_Rela *relstart, *rel, *relend;
6669 Elf_Internal_Shdr *symtab_hdr;
6670 Elf_Internal_Sym *local_syms;
6671 struct _opd_sec_data *opd;
6672 bfd_boolean need_edit, add_aux_fields, broken;
6673 bfd_size_type cnt_16b = 0;
6675 if (!is_ppc64_elf (ibfd))
6678 sec = bfd_get_section_by_name (ibfd, ".opd");
6679 if (sec == NULL || sec->size == 0)
6682 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
6685 if (sec->output_section == bfd_abs_section_ptr)
6688 /* Look through the section relocs. */
6689 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6693 symtab_hdr = &elf_symtab_hdr (ibfd);
6695 /* Read the relocations. */
6696 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6698 if (relstart == NULL)
6701 /* First run through the relocs to check they are sane, and to
6702 determine whether we need to edit this opd section. */
6706 relend = relstart + sec->reloc_count;
6707 for (rel = relstart; rel < relend; )
6709 enum elf_ppc64_reloc_type r_type;
6710 unsigned long r_symndx;
6712 struct elf_link_hash_entry *h;
6713 Elf_Internal_Sym *sym;
6716 /* .opd contains an array of 16 or 24 byte entries. We're
6717 only interested in the reloc pointing to a function entry
6719 offset = rel->r_offset;
6720 if (rel + 1 == relend
6721 || rel[1].r_offset != offset + 8)
6723 /* If someone messes with .opd alignment then after a
6724 "ld -r" we might have padding in the middle of .opd.
6725 Also, there's nothing to prevent someone putting
6726 something silly in .opd with the assembler. No .opd
6727 optimization for them! */
6730 (_("%pB: .opd is not a regular array of opd entries"), ibfd);
6735 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6736 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6739 /* xgettext:c-format */
6740 (_("%pB: unexpected reloc type %u in .opd section"),
6746 r_symndx = ELF64_R_SYM (rel->r_info);
6747 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6751 if (sym_sec == NULL || sym_sec->owner == NULL)
6753 const char *sym_name;
6755 sym_name = h->root.root.string;
6757 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6761 /* xgettext:c-format */
6762 (_("%pB: undefined sym `%s' in .opd section"),
6768 /* opd entries are always for functions defined in the
6769 current input bfd. If the symbol isn't defined in the
6770 input bfd, then we won't be using the function in this
6771 bfd; It must be defined in a linkonce section in another
6772 bfd, or is weak. It's also possible that we are
6773 discarding the function due to a linker script /DISCARD/,
6774 which we test for via the output_section. */
6775 if (sym_sec->owner != ibfd
6776 || sym_sec->output_section == bfd_abs_section_ptr)
6780 if (rel + 1 == relend
6781 || (rel + 2 < relend
6782 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
6787 if (sec->size == offset + 24)
6792 if (sec->size == offset + 16)
6799 else if (rel + 1 < relend
6800 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6801 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6803 if (rel[0].r_offset == offset + 16)
6805 else if (rel[0].r_offset != offset + 24)
6812 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
6814 if (!broken && (need_edit || add_aux_fields))
6816 Elf_Internal_Rela *write_rel;
6817 Elf_Internal_Shdr *rel_hdr;
6818 bfd_byte *rptr, *wptr;
6819 bfd_byte *new_contents;
6822 new_contents = NULL;
6823 amt = OPD_NDX (sec->size) * sizeof (long);
6824 opd = &ppc64_elf_section_data (sec)->u.opd;
6825 opd->adjust = bfd_zalloc (sec->owner, amt);
6826 if (opd->adjust == NULL)
6829 /* This seems a waste of time as input .opd sections are all
6830 zeros as generated by gcc, but I suppose there's no reason
6831 this will always be so. We might start putting something in
6832 the third word of .opd entries. */
6833 if ((sec->flags & SEC_IN_MEMORY) == 0)
6836 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6841 if (local_syms != NULL
6842 && symtab_hdr->contents != (unsigned char *) local_syms)
6844 if (elf_section_data (sec)->relocs != relstart)
6848 sec->contents = loc;
6849 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6852 elf_section_data (sec)->relocs = relstart;
6854 new_contents = sec->contents;
6857 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6858 if (new_contents == NULL)
6862 wptr = new_contents;
6863 rptr = sec->contents;
6864 write_rel = relstart;
6865 for (rel = relstart; rel < relend; )
6867 unsigned long r_symndx;
6869 struct elf_link_hash_entry *h;
6870 struct ppc_link_hash_entry *fdh = NULL;
6871 Elf_Internal_Sym *sym;
6873 Elf_Internal_Rela *next_rel;
6876 r_symndx = ELF64_R_SYM (rel->r_info);
6877 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6882 if (next_rel + 1 == relend
6883 || (next_rel + 2 < relend
6884 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
6887 /* See if the .opd entry is full 24 byte or
6888 16 byte (with fd_aux entry overlapped with next
6891 if (next_rel == relend)
6893 if (sec->size == rel->r_offset + 16)
6896 else if (next_rel->r_offset == rel->r_offset + 16)
6900 && h->root.root.string[0] == '.')
6902 fdh = ((struct ppc_link_hash_entry *) h)->oh;
6905 fdh = ppc_follow_link (fdh);
6906 if (fdh->elf.root.type != bfd_link_hash_defined
6907 && fdh->elf.root.type != bfd_link_hash_defweak)
6912 skip = (sym_sec->owner != ibfd
6913 || sym_sec->output_section == bfd_abs_section_ptr);
6916 if (fdh != NULL && sym_sec->owner == ibfd)
6918 /* Arrange for the function descriptor sym
6920 fdh->elf.root.u.def.value = 0;
6921 fdh->elf.root.u.def.section = sym_sec;
6923 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
6925 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
6930 if (!dec_dynrel_count (rel->r_info, sec, info,
6934 if (++rel == next_rel)
6937 r_symndx = ELF64_R_SYM (rel->r_info);
6938 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6945 /* We'll be keeping this opd entry. */
6950 /* Redefine the function descriptor symbol to
6951 this location in the opd section. It is
6952 necessary to update the value here rather
6953 than using an array of adjustments as we do
6954 for local symbols, because various places
6955 in the generic ELF code use the value
6956 stored in u.def.value. */
6957 fdh->elf.root.u.def.value = wptr - new_contents;
6958 fdh->adjust_done = 1;
6961 /* Local syms are a bit tricky. We could
6962 tweak them as they can be cached, but
6963 we'd need to look through the local syms
6964 for the function descriptor sym which we
6965 don't have at the moment. So keep an
6966 array of adjustments. */
6967 adjust = (wptr - new_contents) - (rptr - sec->contents);
6968 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
6971 memcpy (wptr, rptr, opd_ent_size);
6972 wptr += opd_ent_size;
6973 if (add_aux_fields && opd_ent_size == 16)
6975 memset (wptr, '\0', 8);
6979 /* We need to adjust any reloc offsets to point to the
6981 for ( ; rel != next_rel; ++rel)
6983 rel->r_offset += adjust;
6984 if (write_rel != rel)
6985 memcpy (write_rel, rel, sizeof (*rel));
6990 rptr += opd_ent_size;
6993 sec->size = wptr - new_contents;
6994 sec->reloc_count = write_rel - relstart;
6997 free (sec->contents);
6998 sec->contents = new_contents;
7001 /* Fudge the header size too, as this is used later in
7002 elf_bfd_final_link if we are emitting relocs. */
7003 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7004 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7007 else if (elf_section_data (sec)->relocs != relstart)
7010 if (local_syms != NULL
7011 && symtab_hdr->contents != (unsigned char *) local_syms)
7013 if (!info->keep_memory)
7016 symtab_hdr->contents = (unsigned char *) local_syms;
7021 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7023 /* If we are doing a final link and the last .opd entry is just 16 byte
7024 long, add a 8 byte padding after it. */
7025 if (need_pad != NULL && !bfd_link_relocatable (info))
7029 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7031 BFD_ASSERT (need_pad->size > 0);
7033 p = bfd_malloc (need_pad->size + 8);
7037 if (!bfd_get_section_contents (need_pad->owner, need_pad,
7038 p, 0, need_pad->size))
7041 need_pad->contents = p;
7042 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7046 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7050 need_pad->contents = p;
7053 memset (need_pad->contents + need_pad->size, 0, 8);
7054 need_pad->size += 8;
7060 /* Analyze inline PLT call relocations to see whether calls to locally
7061 defined functions can be converted to direct calls. */
7064 ppc64_elf_inline_plt (struct bfd_link_info *info)
7066 struct ppc_link_hash_table *htab;
7069 bfd_vma low_vma, high_vma, limit;
7071 htab = ppc_hash_table (info);
7075 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
7076 reduced somewhat to cater for possible stubs that might be added
7077 between the call and its destination. */
7078 if (htab->params->group_size < 0)
7080 limit = -htab->params->group_size;
7086 limit = htab->params->group_size;
7093 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
7094 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
7096 if (low_vma > sec->vma)
7098 if (high_vma < sec->vma + sec->size)
7099 high_vma = sec->vma + sec->size;
7102 /* If a "bl" can reach anywhere in local code sections, then we can
7103 convert all inline PLT sequences to direct calls when the symbol
7105 if (high_vma - low_vma < limit)
7107 htab->can_convert_all_inline_plt = 1;
7111 /* Otherwise, go looking through relocs for cases where a direct
7112 call won't reach. Mark the symbol on any such reloc to disable
7113 the optimization and keep the PLT entry as it seems likely that
7114 this will be better than creating trampolines. Note that this
7115 will disable the optimization for all inline PLT calls to a
7116 particular symbol, not just those that won't reach. The
7117 difficulty in doing a more precise optimization is that the
7118 linker needs to make a decision depending on whether a
7119 particular R_PPC64_PLTCALL insn can be turned into a direct
7120 call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in
7121 the sequence, and there is nothing that ties those relocs
7122 together except their symbol. */
7124 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7126 Elf_Internal_Shdr *symtab_hdr;
7127 Elf_Internal_Sym *local_syms;
7129 if (!is_ppc64_elf (ibfd))
7133 symtab_hdr = &elf_symtab_hdr (ibfd);
7135 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7136 if (ppc64_elf_section_data (sec)->has_pltcall
7137 && !bfd_is_abs_section (sec->output_section))
7139 Elf_Internal_Rela *relstart, *rel, *relend;
7141 /* Read the relocations. */
7142 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7144 if (relstart == NULL)
7147 relend = relstart + sec->reloc_count;
7148 for (rel = relstart; rel < relend; )
7150 enum elf_ppc64_reloc_type r_type;
7151 unsigned long r_symndx;
7153 struct elf_link_hash_entry *h;
7154 Elf_Internal_Sym *sym;
7155 unsigned char *tls_maskp;
7157 r_type = ELF64_R_TYPE (rel->r_info);
7158 if (r_type != R_PPC64_PLTCALL)
7161 r_symndx = ELF64_R_SYM (rel->r_info);
7162 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
7165 if (elf_section_data (sec)->relocs != relstart)
7167 if (local_syms != NULL
7168 && symtab_hdr->contents != (bfd_byte *) local_syms)
7173 if (sym_sec != NULL && sym_sec->output_section != NULL)
7177 to = h->root.u.def.value;
7180 to += (rel->r_addend
7181 + sym_sec->output_offset
7182 + sym_sec->output_section->vma);
7183 from = (rel->r_offset
7184 + sec->output_offset
7185 + sec->output_section->vma);
7186 if (to - from + limit < 2 * limit)
7187 *tls_maskp &= ~PLT_KEEP;
7190 if (elf_section_data (sec)->relocs != relstart)
7194 if (local_syms != NULL
7195 && symtab_hdr->contents != (unsigned char *) local_syms)
7197 if (!info->keep_memory)
7200 symtab_hdr->contents = (unsigned char *) local_syms;
7207 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7210 ppc64_elf_tls_setup (struct bfd_link_info *info)
7212 struct ppc_link_hash_table *htab;
7214 htab = ppc_hash_table (info);
7218 if (abiversion (info->output_bfd) == 1)
7221 if (htab->params->no_multi_toc)
7222 htab->do_multi_toc = 0;
7223 else if (!htab->do_multi_toc)
7224 htab->params->no_multi_toc = 1;
7226 /* Default to --no-plt-localentry, as this option can cause problems
7227 with symbol interposition. For example, glibc libpthread.so and
7228 libc.so duplicate many pthread symbols, with a fallback
7229 implementation in libc.so. In some cases the fallback does more
7230 work than the pthread implementation. __pthread_condattr_destroy
7231 is one such symbol: the libpthread.so implementation is
7232 localentry:0 while the libc.so implementation is localentry:8.
7233 An app that "cleverly" uses dlopen to only load necessary
7234 libraries at runtime may omit loading libpthread.so when not
7235 running multi-threaded, which then results in the libc.so
7236 fallback symbols being used and ld.so complaining. Now there
7237 are workarounds in ld (see non_zero_localentry) to detect the
7238 pthread situation, but that may not be the only case where
7239 --plt-localentry can cause trouble. */
7240 if (htab->params->plt_localentry0 < 0)
7241 htab->params->plt_localentry0 = 0;
7242 if (htab->params->plt_localentry0
7243 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
7244 FALSE, FALSE, FALSE) == NULL)
7246 (_("warning: --plt-localentry is especially dangerous without "
7247 "ld.so support to detect ABI violations"));
7249 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7250 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7251 FALSE, FALSE, TRUE));
7252 /* Move dynamic linking info to the function descriptor sym. */
7253 if (htab->tls_get_addr != NULL)
7254 func_desc_adjust (&htab->tls_get_addr->elf, info);
7255 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7256 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7257 FALSE, FALSE, TRUE));
7258 if (htab->params->tls_get_addr_opt)
7260 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7262 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7263 FALSE, FALSE, TRUE);
7265 func_desc_adjust (opt, info);
7266 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7267 FALSE, FALSE, TRUE);
7269 && (opt_fd->root.type == bfd_link_hash_defined
7270 || opt_fd->root.type == bfd_link_hash_defweak))
7272 /* If glibc supports an optimized __tls_get_addr call stub,
7273 signalled by the presence of __tls_get_addr_opt, and we'll
7274 be calling __tls_get_addr via a plt call stub, then
7275 make __tls_get_addr point to __tls_get_addr_opt. */
7276 tga_fd = &htab->tls_get_addr_fd->elf;
7277 if (htab->elf.dynamic_sections_created
7279 && (tga_fd->type == STT_FUNC
7280 || tga_fd->needs_plt)
7281 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7282 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
7284 struct plt_entry *ent;
7286 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7287 if (ent->plt.refcount > 0)
7291 tga_fd->root.type = bfd_link_hash_indirect;
7292 tga_fd->root.u.i.link = &opt_fd->root;
7293 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7295 if (opt_fd->dynindx != -1)
7297 /* Use __tls_get_addr_opt in dynamic relocations. */
7298 opt_fd->dynindx = -1;
7299 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7300 opt_fd->dynstr_index);
7301 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7304 htab->tls_get_addr_fd
7305 = (struct ppc_link_hash_entry *) opt_fd;
7306 tga = &htab->tls_get_addr->elf;
7307 if (opt != NULL && tga != NULL)
7309 tga->root.type = bfd_link_hash_indirect;
7310 tga->root.u.i.link = &opt->root;
7311 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7313 _bfd_elf_link_hash_hide_symbol (info, opt,
7315 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7317 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7318 htab->tls_get_addr_fd->is_func_descriptor = 1;
7319 if (htab->tls_get_addr != NULL)
7321 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7322 htab->tls_get_addr->is_func = 1;
7327 else if (htab->params->tls_get_addr_opt < 0)
7328 htab->params->tls_get_addr_opt = 0;
7330 return _bfd_elf_tls_setup (info->output_bfd, info);
7333 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7337 branch_reloc_hash_match (const bfd *ibfd,
7338 const Elf_Internal_Rela *rel,
7339 const struct ppc_link_hash_entry *hash1,
7340 const struct ppc_link_hash_entry *hash2)
7342 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7343 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7344 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7346 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7348 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7349 struct elf_link_hash_entry *h;
7351 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7352 h = elf_follow_link (h);
7353 if (h == &hash1->elf || h == &hash2->elf)
7359 /* Run through all the TLS relocs looking for optimization
7360 opportunities. The linker has been hacked (see ppc64elf.em) to do
7361 a preliminary section layout so that we know the TLS segment
7362 offsets. We can't optimize earlier because some optimizations need
7363 to know the tp offset, and we need to optimize before allocating
7364 dynamic relocations. */
7367 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7371 struct ppc_link_hash_table *htab;
7372 unsigned char *toc_ref;
7375 if (!bfd_link_executable (info))
7378 htab = ppc_hash_table (info);
7382 /* Make two passes over the relocs. On the first pass, mark toc
7383 entries involved with tls relocs, and check that tls relocs
7384 involved in setting up a tls_get_addr call are indeed followed by
7385 such a call. If they are not, we can't do any tls optimization.
7386 On the second pass twiddle tls_mask flags to notify
7387 relocate_section that optimization can be done, and adjust got
7388 and plt refcounts. */
7390 for (pass = 0; pass < 2; ++pass)
7391 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7393 Elf_Internal_Sym *locsyms = NULL;
7394 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7396 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7397 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7399 Elf_Internal_Rela *relstart, *rel, *relend;
7400 bfd_boolean found_tls_get_addr_arg = 0;
7402 /* Read the relocations. */
7403 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7405 if (relstart == NULL)
7411 relend = relstart + sec->reloc_count;
7412 for (rel = relstart; rel < relend; rel++)
7414 enum elf_ppc64_reloc_type r_type;
7415 unsigned long r_symndx;
7416 struct elf_link_hash_entry *h;
7417 Elf_Internal_Sym *sym;
7419 unsigned char *tls_mask;
7420 unsigned char tls_set, tls_clear, tls_type = 0;
7422 bfd_boolean ok_tprel, is_local;
7423 long toc_ref_index = 0;
7424 int expecting_tls_get_addr = 0;
7425 bfd_boolean ret = FALSE;
7427 r_symndx = ELF64_R_SYM (rel->r_info);
7428 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7432 if (elf_section_data (sec)->relocs != relstart)
7434 if (toc_ref != NULL)
7437 && (elf_symtab_hdr (ibfd).contents
7438 != (unsigned char *) locsyms))
7445 if (h->root.type == bfd_link_hash_defined
7446 || h->root.type == bfd_link_hash_defweak)
7447 value = h->root.u.def.value;
7448 else if (h->root.type == bfd_link_hash_undefweak)
7452 found_tls_get_addr_arg = 0;
7457 /* Symbols referenced by TLS relocs must be of type
7458 STT_TLS. So no need for .opd local sym adjust. */
7459 value = sym->st_value;
7468 && h->root.type == bfd_link_hash_undefweak)
7470 else if (sym_sec != NULL
7471 && sym_sec->output_section != NULL)
7473 value += sym_sec->output_offset;
7474 value += sym_sec->output_section->vma;
7475 value -= htab->elf.tls_sec->vma;
7476 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7477 < (bfd_vma) 1 << 32);
7481 r_type = ELF64_R_TYPE (rel->r_info);
7482 /* If this section has old-style __tls_get_addr calls
7483 without marker relocs, then check that each
7484 __tls_get_addr call reloc is preceded by a reloc
7485 that conceivably belongs to the __tls_get_addr arg
7486 setup insn. If we don't find matching arg setup
7487 relocs, don't do any tls optimization. */
7489 && sec->has_tls_get_addr_call
7491 && (h == &htab->tls_get_addr->elf
7492 || h == &htab->tls_get_addr_fd->elf)
7493 && !found_tls_get_addr_arg
7494 && is_branch_reloc (r_type))
7496 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7497 "TLS optimization disabled\n"),
7498 ibfd, sec, rel->r_offset);
7503 found_tls_get_addr_arg = 0;
7506 case R_PPC64_GOT_TLSLD16:
7507 case R_PPC64_GOT_TLSLD16_LO:
7508 expecting_tls_get_addr = 1;
7509 found_tls_get_addr_arg = 1;
7512 case R_PPC64_GOT_TLSLD16_HI:
7513 case R_PPC64_GOT_TLSLD16_HA:
7514 /* These relocs should never be against a symbol
7515 defined in a shared lib. Leave them alone if
7516 that turns out to be the case. */
7523 tls_type = TLS_TLS | TLS_LD;
7526 case R_PPC64_GOT_TLSGD16:
7527 case R_PPC64_GOT_TLSGD16_LO:
7528 expecting_tls_get_addr = 1;
7529 found_tls_get_addr_arg = 1;
7532 case R_PPC64_GOT_TLSGD16_HI:
7533 case R_PPC64_GOT_TLSGD16_HA:
7539 tls_set = TLS_TLS | TLS_TPRELGD;
7541 tls_type = TLS_TLS | TLS_GD;
7544 case R_PPC64_GOT_TPREL16_DS:
7545 case R_PPC64_GOT_TPREL16_LO_DS:
7546 case R_PPC64_GOT_TPREL16_HI:
7547 case R_PPC64_GOT_TPREL16_HA:
7552 tls_clear = TLS_TPREL;
7553 tls_type = TLS_TLS | TLS_TPREL;
7560 if (rel + 1 < relend
7561 && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
7564 && (ELF64_R_TYPE (rel[1].r_info)
7567 r_symndx = ELF64_R_SYM (rel[1].r_info);
7568 if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms,
7573 struct plt_entry *ent = NULL;
7575 for (ent = h->plt.plist;
7578 if (ent->addend == rel[1].r_addend)
7582 && ent->plt.refcount > 0)
7583 ent->plt.refcount -= 1;
7588 found_tls_get_addr_arg = 1;
7593 case R_PPC64_TOC16_LO:
7594 if (sym_sec == NULL || sym_sec != toc)
7597 /* Mark this toc entry as referenced by a TLS
7598 code sequence. We can do that now in the
7599 case of R_PPC64_TLS, and after checking for
7600 tls_get_addr for the TOC16 relocs. */
7601 if (toc_ref == NULL)
7603 = bfd_zmalloc (toc->output_section->rawsize / 8);
7604 if (toc_ref == NULL)
7608 value = h->root.u.def.value;
7610 value = sym->st_value;
7611 value += rel->r_addend;
7614 BFD_ASSERT (value < toc->size
7615 && toc->output_offset % 8 == 0);
7616 toc_ref_index = (value + toc->output_offset) / 8;
7617 if (r_type == R_PPC64_TLS
7618 || r_type == R_PPC64_TLSGD
7619 || r_type == R_PPC64_TLSLD)
7621 toc_ref[toc_ref_index] = 1;
7625 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7630 expecting_tls_get_addr = 2;
7633 case R_PPC64_TPREL64:
7637 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7642 tls_set = TLS_EXPLICIT;
7643 tls_clear = TLS_TPREL;
7648 case R_PPC64_DTPMOD64:
7652 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7654 if (rel + 1 < relend
7656 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7657 && rel[1].r_offset == rel->r_offset + 8)
7661 tls_set = TLS_EXPLICIT | TLS_GD;
7664 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7673 tls_set = TLS_EXPLICIT;
7684 if (!expecting_tls_get_addr
7685 || !sec->has_tls_get_addr_call)
7688 if (rel + 1 < relend
7689 && branch_reloc_hash_match (ibfd, rel + 1,
7691 htab->tls_get_addr_fd))
7693 if (expecting_tls_get_addr == 2)
7695 /* Check for toc tls entries. */
7696 unsigned char *toc_tls;
7699 retval = get_tls_mask (&toc_tls, NULL, NULL,
7704 if (toc_tls != NULL)
7706 if ((*toc_tls & TLS_TLS) != 0
7707 && ((*toc_tls & (TLS_GD | TLS_LD)) != 0))
7708 found_tls_get_addr_arg = 1;
7710 toc_ref[toc_ref_index] = 1;
7716 /* Uh oh, we didn't find the expected call. We
7717 could just mark this symbol to exclude it
7718 from tls optimization but it's safer to skip
7719 the entire optimization. */
7720 /* xgettext:c-format */
7721 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7722 "TLS optimization disabled\n"),
7723 ibfd, sec, rel->r_offset);
7728 /* If we don't have old-style __tls_get_addr calls
7729 without TLSGD/TLSLD marker relocs, and we haven't
7730 found a new-style __tls_get_addr call with a
7731 marker for this symbol, then we either have a
7732 broken object file or an -mlongcall style
7733 indirect call to __tls_get_addr without a marker.
7734 Disable optimization in this case. */
7735 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
7736 && (tls_set & TLS_EXPLICIT) == 0
7737 && !sec->has_tls_get_addr_call
7738 && ((*tls_mask & (TLS_TLS | TLS_MARK))
7739 != (TLS_TLS | TLS_MARK)))
7742 if (expecting_tls_get_addr)
7744 struct plt_entry *ent = NULL;
7746 if (htab->tls_get_addr != NULL)
7747 for (ent = htab->tls_get_addr->elf.plt.plist;
7750 if (ent->addend == 0)
7753 if (ent == NULL && htab->tls_get_addr_fd != NULL)
7754 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7757 if (ent->addend == 0)
7761 && ent->plt.refcount > 0)
7762 ent->plt.refcount -= 1;
7768 if ((tls_set & TLS_EXPLICIT) == 0)
7770 struct got_entry *ent;
7772 /* Adjust got entry for this reloc. */
7776 ent = elf_local_got_ents (ibfd)[r_symndx];
7778 for (; ent != NULL; ent = ent->next)
7779 if (ent->addend == rel->r_addend
7780 && ent->owner == ibfd
7781 && ent->tls_type == tls_type)
7788 /* We managed to get rid of a got entry. */
7789 if (ent->got.refcount > 0)
7790 ent->got.refcount -= 1;
7795 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7796 we'll lose one or two dyn relocs. */
7797 if (!dec_dynrel_count (rel->r_info, sec, info,
7801 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7803 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7809 *tls_mask |= tls_set;
7810 *tls_mask &= ~tls_clear;
7813 if (elf_section_data (sec)->relocs != relstart)
7818 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7820 if (!info->keep_memory)
7823 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7827 if (toc_ref != NULL)
7829 htab->do_tls_opt = 1;
7833 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7834 the values of any global symbols in a toc section that has been
7835 edited. Globals in toc sections should be a rarity, so this function
7836 sets a flag if any are found in toc sections other than the one just
7837 edited, so that further hash table traversals can be avoided. */
7839 struct adjust_toc_info
7842 unsigned long *skip;
7843 bfd_boolean global_toc_syms;
7846 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7849 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7851 struct ppc_link_hash_entry *eh;
7852 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7855 if (h->root.type != bfd_link_hash_defined
7856 && h->root.type != bfd_link_hash_defweak)
7859 eh = (struct ppc_link_hash_entry *) h;
7860 if (eh->adjust_done)
7863 if (eh->elf.root.u.def.section == toc_inf->toc)
7865 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7866 i = toc_inf->toc->rawsize >> 3;
7868 i = eh->elf.root.u.def.value >> 3;
7870 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7873 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7876 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7877 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7880 eh->elf.root.u.def.value -= toc_inf->skip[i];
7881 eh->adjust_done = 1;
7883 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7884 toc_inf->global_toc_syms = TRUE;
7889 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
7890 on a _LO variety toc/got reloc. */
7893 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
7895 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
7896 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
7897 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7898 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7899 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7900 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7901 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7902 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7903 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7904 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7905 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7906 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7907 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7908 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7909 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7910 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
7911 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
7912 /* Exclude lfqu by testing reloc. If relocs are ever
7913 defined for the reduced D field in psq_lu then those
7914 will need testing too. */
7915 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
7916 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
7918 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
7919 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
7920 /* Exclude stfqu. psq_stu as above for psq_lu. */
7921 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
7922 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
7923 && (insn & 1) == 0));
7926 /* Examine all relocs referencing .toc sections in order to remove
7927 unused .toc entries. */
7930 ppc64_elf_edit_toc (struct bfd_link_info *info)
7933 struct adjust_toc_info toc_inf;
7934 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7936 htab->do_toc_opt = 1;
7937 toc_inf.global_toc_syms = TRUE;
7938 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7940 asection *toc, *sec;
7941 Elf_Internal_Shdr *symtab_hdr;
7942 Elf_Internal_Sym *local_syms;
7943 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7944 unsigned long *skip, *drop;
7945 unsigned char *used;
7946 unsigned char *keep, last, some_unused;
7948 if (!is_ppc64_elf (ibfd))
7951 toc = bfd_get_section_by_name (ibfd, ".toc");
7954 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
7955 || discarded_section (toc))
7960 symtab_hdr = &elf_symtab_hdr (ibfd);
7962 /* Look at sections dropped from the final link. */
7965 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7967 if (sec->reloc_count == 0
7968 || !discarded_section (sec)
7969 || get_opd_info (sec)
7970 || (sec->flags & SEC_ALLOC) == 0
7971 || (sec->flags & SEC_DEBUGGING) != 0)
7974 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7975 if (relstart == NULL)
7978 /* Run through the relocs to see which toc entries might be
7980 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7982 enum elf_ppc64_reloc_type r_type;
7983 unsigned long r_symndx;
7985 struct elf_link_hash_entry *h;
7986 Elf_Internal_Sym *sym;
7989 r_type = ELF64_R_TYPE (rel->r_info);
7996 case R_PPC64_TOC16_LO:
7997 case R_PPC64_TOC16_HI:
7998 case R_PPC64_TOC16_HA:
7999 case R_PPC64_TOC16_DS:
8000 case R_PPC64_TOC16_LO_DS:
8004 r_symndx = ELF64_R_SYM (rel->r_info);
8005 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8013 val = h->root.u.def.value;
8015 val = sym->st_value;
8016 val += rel->r_addend;
8018 if (val >= toc->size)
8021 /* Anything in the toc ought to be aligned to 8 bytes.
8022 If not, don't mark as unused. */
8028 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8033 skip[val >> 3] = ref_from_discarded;
8036 if (elf_section_data (sec)->relocs != relstart)
8040 /* For largetoc loads of address constants, we can convert
8041 . addis rx,2,addr@got@ha
8042 . ld ry,addr@got@l(rx)
8044 . addis rx,2,addr@toc@ha
8045 . addi ry,rx,addr@toc@l
8046 when addr is within 2G of the toc pointer. This then means
8047 that the word storing "addr" in the toc is no longer needed. */
8049 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8050 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8051 && toc->reloc_count != 0)
8053 /* Read toc relocs. */
8054 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8056 if (toc_relocs == NULL)
8059 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8061 enum elf_ppc64_reloc_type r_type;
8062 unsigned long r_symndx;
8064 struct elf_link_hash_entry *h;
8065 Elf_Internal_Sym *sym;
8068 r_type = ELF64_R_TYPE (rel->r_info);
8069 if (r_type != R_PPC64_ADDR64)
8072 r_symndx = ELF64_R_SYM (rel->r_info);
8073 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8078 || sym_sec->output_section == NULL
8079 || discarded_section (sym_sec))
8082 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8087 if (h->type == STT_GNU_IFUNC)
8089 val = h->root.u.def.value;
8093 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8095 val = sym->st_value;
8097 val += rel->r_addend;
8098 val += sym_sec->output_section->vma + sym_sec->output_offset;
8100 /* We don't yet know the exact toc pointer value, but we
8101 know it will be somewhere in the toc section. Don't
8102 optimize if the difference from any possible toc
8103 pointer is outside [ff..f80008000, 7fff7fff]. */
8104 addr = toc->output_section->vma + TOC_BASE_OFF;
8105 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8108 addr = toc->output_section->vma + toc->output_section->rawsize;
8109 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8114 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8119 skip[rel->r_offset >> 3]
8120 |= can_optimize | ((rel - toc_relocs) << 2);
8127 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8131 if (local_syms != NULL
8132 && symtab_hdr->contents != (unsigned char *) local_syms)
8136 && elf_section_data (sec)->relocs != relstart)
8138 if (toc_relocs != NULL
8139 && elf_section_data (toc)->relocs != toc_relocs)
8146 /* Now check all kept sections that might reference the toc.
8147 Check the toc itself last. */
8148 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8151 sec = (sec == toc ? NULL
8152 : sec->next == NULL ? toc
8153 : sec->next == toc && toc->next ? toc->next
8158 if (sec->reloc_count == 0
8159 || discarded_section (sec)
8160 || get_opd_info (sec)
8161 || (sec->flags & SEC_ALLOC) == 0
8162 || (sec->flags & SEC_DEBUGGING) != 0)
8165 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8167 if (relstart == NULL)
8173 /* Mark toc entries referenced as used. */
8177 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8179 enum elf_ppc64_reloc_type r_type;
8180 unsigned long r_symndx;
8182 struct elf_link_hash_entry *h;
8183 Elf_Internal_Sym *sym;
8185 enum {no_check, check_lo, check_ha} insn_check;
8187 r_type = ELF64_R_TYPE (rel->r_info);
8191 insn_check = no_check;
8194 case R_PPC64_GOT_TLSLD16_HA:
8195 case R_PPC64_GOT_TLSGD16_HA:
8196 case R_PPC64_GOT_TPREL16_HA:
8197 case R_PPC64_GOT_DTPREL16_HA:
8198 case R_PPC64_GOT16_HA:
8199 case R_PPC64_TOC16_HA:
8200 insn_check = check_ha;
8203 case R_PPC64_GOT_TLSLD16_LO:
8204 case R_PPC64_GOT_TLSGD16_LO:
8205 case R_PPC64_GOT_TPREL16_LO_DS:
8206 case R_PPC64_GOT_DTPREL16_LO_DS:
8207 case R_PPC64_GOT16_LO:
8208 case R_PPC64_GOT16_LO_DS:
8209 case R_PPC64_TOC16_LO:
8210 case R_PPC64_TOC16_LO_DS:
8211 insn_check = check_lo;
8215 if (insn_check != no_check)
8217 bfd_vma off = rel->r_offset & ~3;
8218 unsigned char buf[4];
8221 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8226 insn = bfd_get_32 (ibfd, buf);
8227 if (insn_check == check_lo
8228 ? !ok_lo_toc_insn (insn, r_type)
8229 : ((insn & ((0x3f << 26) | 0x1f << 16))
8230 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8234 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8235 sprintf (str, "%#08x", insn);
8236 info->callbacks->einfo
8237 /* xgettext:c-format */
8238 (_("%H: toc optimization is not supported for"
8239 " %s instruction\n"),
8240 ibfd, sec, rel->r_offset & ~3, str);
8247 case R_PPC64_TOC16_LO:
8248 case R_PPC64_TOC16_HI:
8249 case R_PPC64_TOC16_HA:
8250 case R_PPC64_TOC16_DS:
8251 case R_PPC64_TOC16_LO_DS:
8252 /* In case we're taking addresses of toc entries. */
8253 case R_PPC64_ADDR64:
8260 r_symndx = ELF64_R_SYM (rel->r_info);
8261 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8272 val = h->root.u.def.value;
8274 val = sym->st_value;
8275 val += rel->r_addend;
8277 if (val >= toc->size)
8280 if ((skip[val >> 3] & can_optimize) != 0)
8287 case R_PPC64_TOC16_HA:
8290 case R_PPC64_TOC16_LO_DS:
8291 off = rel->r_offset;
8292 off += (bfd_big_endian (ibfd) ? -2 : 3);
8293 if (!bfd_get_section_contents (ibfd, sec, &opc,
8299 if ((opc & (0x3f << 2)) == (58u << 2))
8304 /* Wrong sort of reloc, or not a ld. We may
8305 as well clear ref_from_discarded too. */
8312 /* For the toc section, we only mark as used if this
8313 entry itself isn't unused. */
8314 else if ((used[rel->r_offset >> 3]
8315 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8318 /* Do all the relocs again, to catch reference
8327 if (elf_section_data (sec)->relocs != relstart)
8331 /* Merge the used and skip arrays. Assume that TOC
8332 doublewords not appearing as either used or unused belong
8333 to an entry more than one doubleword in size. */
8334 for (drop = skip, keep = used, last = 0, some_unused = 0;
8335 drop < skip + (toc->size + 7) / 8;
8340 *drop &= ~ref_from_discarded;
8341 if ((*drop & can_optimize) != 0)
8345 else if ((*drop & ref_from_discarded) != 0)
8348 last = ref_from_discarded;
8358 bfd_byte *contents, *src;
8360 Elf_Internal_Sym *sym;
8361 bfd_boolean local_toc_syms = FALSE;
8363 /* Shuffle the toc contents, and at the same time convert the
8364 skip array from booleans into offsets. */
8365 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8368 elf_section_data (toc)->this_hdr.contents = contents;
8370 for (src = contents, off = 0, drop = skip;
8371 src < contents + toc->size;
8374 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8379 memcpy (src - off, src, 8);
8383 toc->rawsize = toc->size;
8384 toc->size = src - contents - off;
8386 /* Adjust addends for relocs against the toc section sym,
8387 and optimize any accesses we can. */
8388 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8390 if (sec->reloc_count == 0
8391 || discarded_section (sec))
8394 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8396 if (relstart == NULL)
8399 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8401 enum elf_ppc64_reloc_type r_type;
8402 unsigned long r_symndx;
8404 struct elf_link_hash_entry *h;
8407 r_type = ELF64_R_TYPE (rel->r_info);
8414 case R_PPC64_TOC16_LO:
8415 case R_PPC64_TOC16_HI:
8416 case R_PPC64_TOC16_HA:
8417 case R_PPC64_TOC16_DS:
8418 case R_PPC64_TOC16_LO_DS:
8419 case R_PPC64_ADDR64:
8423 r_symndx = ELF64_R_SYM (rel->r_info);
8424 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8432 val = h->root.u.def.value;
8435 val = sym->st_value;
8437 local_toc_syms = TRUE;
8440 val += rel->r_addend;
8442 if (val > toc->rawsize)
8444 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8446 else if ((skip[val >> 3] & can_optimize) != 0)
8448 Elf_Internal_Rela *tocrel
8449 = toc_relocs + (skip[val >> 3] >> 2);
8450 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8454 case R_PPC64_TOC16_HA:
8455 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8458 case R_PPC64_TOC16_LO_DS:
8459 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8463 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8465 info->callbacks->einfo
8466 /* xgettext:c-format */
8467 (_("%H: %s references "
8468 "optimized away TOC entry\n"),
8469 ibfd, sec, rel->r_offset,
8470 ppc64_elf_howto_table[r_type]->name);
8471 bfd_set_error (bfd_error_bad_value);
8474 rel->r_addend = tocrel->r_addend;
8475 elf_section_data (sec)->relocs = relstart;
8479 if (h != NULL || sym->st_value != 0)
8482 rel->r_addend -= skip[val >> 3];
8483 elf_section_data (sec)->relocs = relstart;
8486 if (elf_section_data (sec)->relocs != relstart)
8490 /* We shouldn't have local or global symbols defined in the TOC,
8491 but handle them anyway. */
8492 if (local_syms != NULL)
8493 for (sym = local_syms;
8494 sym < local_syms + symtab_hdr->sh_info;
8496 if (sym->st_value != 0
8497 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8501 if (sym->st_value > toc->rawsize)
8502 i = toc->rawsize >> 3;
8504 i = sym->st_value >> 3;
8506 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8510 (_("%s defined on removed toc entry"),
8511 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8514 while ((skip[i] & (ref_from_discarded | can_optimize)));
8515 sym->st_value = (bfd_vma) i << 3;
8518 sym->st_value -= skip[i];
8519 symtab_hdr->contents = (unsigned char *) local_syms;
8522 /* Adjust any global syms defined in this toc input section. */
8523 if (toc_inf.global_toc_syms)
8526 toc_inf.skip = skip;
8527 toc_inf.global_toc_syms = FALSE;
8528 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8532 if (toc->reloc_count != 0)
8534 Elf_Internal_Shdr *rel_hdr;
8535 Elf_Internal_Rela *wrel;
8538 /* Remove unused toc relocs, and adjust those we keep. */
8539 if (toc_relocs == NULL)
8540 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8542 if (toc_relocs == NULL)
8546 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8547 if ((skip[rel->r_offset >> 3]
8548 & (ref_from_discarded | can_optimize)) == 0)
8550 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8551 wrel->r_info = rel->r_info;
8552 wrel->r_addend = rel->r_addend;
8555 else if (!dec_dynrel_count (rel->r_info, toc, info,
8556 &local_syms, NULL, NULL))
8559 elf_section_data (toc)->relocs = toc_relocs;
8560 toc->reloc_count = wrel - toc_relocs;
8561 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8562 sz = rel_hdr->sh_entsize;
8563 rel_hdr->sh_size = toc->reloc_count * sz;
8566 else if (toc_relocs != NULL
8567 && elf_section_data (toc)->relocs != toc_relocs)
8570 if (local_syms != NULL
8571 && symtab_hdr->contents != (unsigned char *) local_syms)
8573 if (!info->keep_memory)
8576 symtab_hdr->contents = (unsigned char *) local_syms;
8584 /* Return true iff input section I references the TOC using
8585 instructions limited to +/-32k offsets. */
8588 ppc64_elf_has_small_toc_reloc (asection *i)
8590 return (is_ppc64_elf (i->owner)
8591 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8594 /* Allocate space for one GOT entry. */
8597 allocate_got (struct elf_link_hash_entry *h,
8598 struct bfd_link_info *info,
8599 struct got_entry *gent)
8601 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8602 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8603 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8605 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8606 ? 2 : 1) * sizeof (Elf64_External_Rela);
8607 asection *got = ppc64_elf_tdata (gent->owner)->got;
8609 gent->got.offset = got->size;
8610 got->size += entsize;
8612 if (h->type == STT_GNU_IFUNC)
8614 htab->elf.irelplt->size += rentsize;
8615 htab->got_reli_size += rentsize;
8617 else if (((bfd_link_pic (info)
8618 && !((gent->tls_type & TLS_TPREL) != 0
8619 && bfd_link_executable (info)
8620 && SYMBOL_REFERENCES_LOCAL (info, h)))
8621 || (htab->elf.dynamic_sections_created
8623 && !SYMBOL_REFERENCES_LOCAL (info, h)))
8624 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8626 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8627 relgot->size += rentsize;
8631 /* This function merges got entries in the same toc group. */
8634 merge_got_entries (struct got_entry **pent)
8636 struct got_entry *ent, *ent2;
8638 for (ent = *pent; ent != NULL; ent = ent->next)
8639 if (!ent->is_indirect)
8640 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8641 if (!ent2->is_indirect
8642 && ent2->addend == ent->addend
8643 && ent2->tls_type == ent->tls_type
8644 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8646 ent2->is_indirect = TRUE;
8647 ent2->got.ent = ent;
8651 /* If H is undefined, make it dynamic if that makes sense. */
8654 ensure_undef_dynamic (struct bfd_link_info *info,
8655 struct elf_link_hash_entry *h)
8657 struct elf_link_hash_table *htab = elf_hash_table (info);
8659 if (htab->dynamic_sections_created
8660 && ((info->dynamic_undefined_weak != 0
8661 && h->root.type == bfd_link_hash_undefweak)
8662 || h->root.type == bfd_link_hash_undefined)
8665 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
8666 return bfd_elf_link_record_dynamic_symbol (info, h);
8670 /* Allocate space in .plt, .got and associated reloc sections for
8674 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8676 struct bfd_link_info *info;
8677 struct ppc_link_hash_table *htab;
8679 struct ppc_link_hash_entry *eh;
8680 struct got_entry **pgent, *gent;
8682 if (h->root.type == bfd_link_hash_indirect)
8685 info = (struct bfd_link_info *) inf;
8686 htab = ppc_hash_table (info);
8690 eh = (struct ppc_link_hash_entry *) h;
8691 /* Run through the TLS GD got entries first if we're changing them
8693 if ((eh->tls_mask & (TLS_TLS | TLS_TPRELGD)) == (TLS_TLS | TLS_TPRELGD))
8694 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8695 if (gent->got.refcount > 0
8696 && (gent->tls_type & TLS_GD) != 0)
8698 /* This was a GD entry that has been converted to TPREL. If
8699 there happens to be a TPREL entry we can use that one. */
8700 struct got_entry *ent;
8701 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8702 if (ent->got.refcount > 0
8703 && (ent->tls_type & TLS_TPREL) != 0
8704 && ent->addend == gent->addend
8705 && ent->owner == gent->owner)
8707 gent->got.refcount = 0;
8711 /* If not, then we'll be using our own TPREL entry. */
8712 if (gent->got.refcount != 0)
8713 gent->tls_type = TLS_TLS | TLS_TPREL;
8716 /* Remove any list entry that won't generate a word in the GOT before
8717 we call merge_got_entries. Otherwise we risk merging to empty
8719 pgent = &h->got.glist;
8720 while ((gent = *pgent) != NULL)
8721 if (gent->got.refcount > 0)
8723 if ((gent->tls_type & TLS_LD) != 0
8726 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8727 *pgent = gent->next;
8730 pgent = &gent->next;
8733 *pgent = gent->next;
8735 if (!htab->do_multi_toc)
8736 merge_got_entries (&h->got.glist);
8738 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8739 if (!gent->is_indirect)
8741 /* Make sure this symbol is output as a dynamic symbol. */
8742 if (!ensure_undef_dynamic (info, h))
8745 if (!is_ppc64_elf (gent->owner))
8748 allocate_got (h, info, gent);
8751 /* If no dynamic sections we can't have dynamic relocs, except for
8752 IFUNCs which are handled even in static executables. */
8753 if (!htab->elf.dynamic_sections_created
8754 && h->type != STT_GNU_IFUNC)
8755 eh->dyn_relocs = NULL;
8757 /* Discard relocs on undefined symbols that must be local. */
8758 else if (h->root.type == bfd_link_hash_undefined
8759 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8760 eh->dyn_relocs = NULL;
8762 /* Also discard relocs on undefined weak syms with non-default
8763 visibility, or when dynamic_undefined_weak says so. */
8764 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8765 eh->dyn_relocs = NULL;
8767 if (eh->dyn_relocs != NULL)
8769 struct elf_dyn_relocs *p, **pp;
8771 /* In the shared -Bsymbolic case, discard space allocated for
8772 dynamic pc-relative relocs against symbols which turn out to
8773 be defined in regular objects. For the normal shared case,
8774 discard space for relocs that have become local due to symbol
8775 visibility changes. */
8777 if (bfd_link_pic (info))
8779 /* Relocs that use pc_count are those that appear on a call
8780 insn, or certain REL relocs (see must_be_dyn_reloc) that
8781 can be generated via assembly. We want calls to
8782 protected symbols to resolve directly to the function
8783 rather than going via the plt. If people want function
8784 pointer comparisons to work as expected then they should
8785 avoid writing weird assembly. */
8786 if (SYMBOL_CALLS_LOCAL (info, h))
8788 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8790 p->count -= p->pc_count;
8799 if (eh->dyn_relocs != NULL)
8801 /* Make sure this symbol is output as a dynamic symbol. */
8802 if (!ensure_undef_dynamic (info, h))
8806 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
8808 /* For the non-pic case, discard space for relocs against
8809 symbols which turn out to need copy relocs or are not
8811 if (h->dynamic_adjusted
8813 && !ELF_COMMON_DEF_P (h))
8815 /* Make sure this symbol is output as a dynamic symbol. */
8816 if (!ensure_undef_dynamic (info, h))
8819 if (h->dynindx == -1)
8820 eh->dyn_relocs = NULL;
8823 eh->dyn_relocs = NULL;
8826 /* Finally, allocate space. */
8827 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8829 asection *sreloc = elf_section_data (p->sec)->sreloc;
8830 if (eh->elf.type == STT_GNU_IFUNC)
8831 sreloc = htab->elf.irelplt;
8832 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8836 /* We might need a PLT entry when the symbol
8839 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
8840 d) has plt16 relocs and we are linking statically. */
8841 if ((htab->elf.dynamic_sections_created && h->dynindx != -1)
8842 || h->type == STT_GNU_IFUNC
8843 || (h->needs_plt && h->dynamic_adjusted)
8846 && !htab->elf.dynamic_sections_created
8847 && !htab->can_convert_all_inline_plt
8848 && (((struct ppc_link_hash_entry *) h)->tls_mask
8849 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
8851 struct plt_entry *pent;
8852 bfd_boolean doneone = FALSE;
8853 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8854 if (pent->plt.refcount > 0)
8856 if (!htab->elf.dynamic_sections_created
8857 || h->dynindx == -1)
8859 if (h->type == STT_GNU_IFUNC)
8862 pent->plt.offset = s->size;
8863 s->size += PLT_ENTRY_SIZE (htab);
8864 s = htab->elf.irelplt;
8869 pent->plt.offset = s->size;
8870 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
8871 s = bfd_link_pic (info) ? htab->relpltlocal : NULL;
8876 /* If this is the first .plt entry, make room for the special
8880 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
8882 pent->plt.offset = s->size;
8884 /* Make room for this entry. */
8885 s->size += PLT_ENTRY_SIZE (htab);
8887 /* Make room for the .glink code. */
8890 s->size += GLINK_PLTRESOLVE_SIZE (htab);
8893 /* We need bigger stubs past index 32767. */
8894 if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4)
8901 /* We also need to make an entry in the .rela.plt section. */
8902 s = htab->elf.srelplt;
8905 s->size += sizeof (Elf64_External_Rela);
8909 pent->plt.offset = (bfd_vma) -1;
8912 h->plt.plist = NULL;
8918 h->plt.plist = NULL;
8925 #define PPC_LO(v) ((v) & 0xffff)
8926 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8927 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8929 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
8930 to set up space for global entry stubs. These are put in glink,
8931 after the branch table. */
8934 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
8936 struct bfd_link_info *info;
8937 struct ppc_link_hash_table *htab;
8938 struct plt_entry *pent;
8941 if (h->root.type == bfd_link_hash_indirect)
8944 if (!h->pointer_equality_needed)
8951 htab = ppc_hash_table (info);
8955 s = htab->global_entry;
8956 plt = htab->elf.splt;
8957 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8958 if (pent->plt.offset != (bfd_vma) -1
8959 && pent->addend == 0)
8961 /* For ELFv2, if this symbol is not defined in a regular file
8962 and we are not generating a shared library or pie, then we
8963 need to define the symbol in the executable on a call stub.
8964 This is to avoid text relocations. */
8965 bfd_vma off, stub_align, stub_off, stub_size;
8966 unsigned int align_power;
8970 if (htab->params->plt_stub_align >= 0)
8971 align_power = htab->params->plt_stub_align;
8973 align_power = -htab->params->plt_stub_align;
8974 /* Setting section alignment is delayed until we know it is
8975 non-empty. Otherwise the .text output section will be
8976 aligned at least to plt_stub_align even when no global
8977 entry stubs are needed. */
8978 if (s->alignment_power < align_power)
8979 s->alignment_power = align_power;
8980 stub_align = (bfd_vma) 1 << align_power;
8981 if (htab->params->plt_stub_align >= 0
8982 || ((((stub_off + stub_size - 1) & -stub_align)
8983 - (stub_off & -stub_align))
8984 > ((stub_size - 1) & -stub_align)))
8985 stub_off = (stub_off + stub_align - 1) & -stub_align;
8986 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
8987 off -= stub_off + s->output_offset + s->output_section->vma;
8988 /* Note that for --plt-stub-align negative we have a possible
8989 dependency between stub offset and size. Break that
8990 dependency by assuming the max stub size when calculating
8992 if (PPC_HA (off) == 0)
8994 h->root.type = bfd_link_hash_defined;
8995 h->root.u.def.section = s;
8996 h->root.u.def.value = stub_off;
8997 s->size = stub_off + stub_size;
9003 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9004 read-only sections. */
9007 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9011 if (h->root.type == bfd_link_hash_indirect)
9014 sec = readonly_dynrelocs (h);
9017 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9019 info->flags |= DF_TEXTREL;
9020 info->callbacks->minfo (_("%pB: dynamic relocation against `%pT'"
9021 " in read-only section `%pA'\n"),
9022 sec->owner, h->root.root.string, sec);
9024 /* Not an error, just cut short the traversal. */
9030 /* Set the sizes of the dynamic sections. */
9033 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9034 struct bfd_link_info *info)
9036 struct ppc_link_hash_table *htab;
9041 struct got_entry *first_tlsld;
9043 htab = ppc_hash_table (info);
9047 dynobj = htab->elf.dynobj;
9051 if (htab->elf.dynamic_sections_created)
9053 /* Set the contents of the .interp section to the interpreter. */
9054 if (bfd_link_executable (info) && !info->nointerp)
9056 s = bfd_get_linker_section (dynobj, ".interp");
9059 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9060 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9064 /* Set up .got offsets for local syms, and space for local dynamic
9066 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9068 struct got_entry **lgot_ents;
9069 struct got_entry **end_lgot_ents;
9070 struct plt_entry **local_plt;
9071 struct plt_entry **end_local_plt;
9072 unsigned char *lgot_masks;
9073 bfd_size_type locsymcount;
9074 Elf_Internal_Shdr *symtab_hdr;
9076 if (!is_ppc64_elf (ibfd))
9079 for (s = ibfd->sections; s != NULL; s = s->next)
9081 struct ppc_dyn_relocs *p;
9083 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9085 if (!bfd_is_abs_section (p->sec)
9086 && bfd_is_abs_section (p->sec->output_section))
9088 /* Input section has been discarded, either because
9089 it is a copy of a linkonce section or due to
9090 linker script /DISCARD/, so we'll be discarding
9093 else if (p->count != 0)
9095 asection *srel = elf_section_data (p->sec)->sreloc;
9097 srel = htab->elf.irelplt;
9098 srel->size += p->count * sizeof (Elf64_External_Rela);
9099 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9100 info->flags |= DF_TEXTREL;
9105 lgot_ents = elf_local_got_ents (ibfd);
9109 symtab_hdr = &elf_symtab_hdr (ibfd);
9110 locsymcount = symtab_hdr->sh_info;
9111 end_lgot_ents = lgot_ents + locsymcount;
9112 local_plt = (struct plt_entry **) end_lgot_ents;
9113 end_local_plt = local_plt + locsymcount;
9114 lgot_masks = (unsigned char *) end_local_plt;
9115 s = ppc64_elf_tdata (ibfd)->got;
9116 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9118 struct got_entry **pent, *ent;
9121 while ((ent = *pent) != NULL)
9122 if (ent->got.refcount > 0)
9124 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9126 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9131 unsigned int ent_size = 8;
9132 unsigned int rel_size = sizeof (Elf64_External_Rela);
9134 ent->got.offset = s->size;
9135 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9140 s->size += ent_size;
9141 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
9143 htab->elf.irelplt->size += rel_size;
9144 htab->got_reli_size += rel_size;
9146 else if (bfd_link_pic (info)
9147 && !((ent->tls_type & TLS_TPREL) != 0
9148 && bfd_link_executable (info)))
9150 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9151 srel->size += rel_size;
9160 /* Allocate space for plt calls to local syms. */
9161 lgot_masks = (unsigned char *) end_local_plt;
9162 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
9164 struct plt_entry *ent;
9166 for (ent = *local_plt; ent != NULL; ent = ent->next)
9167 if (ent->plt.refcount > 0)
9169 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
9172 ent->plt.offset = s->size;
9173 s->size += PLT_ENTRY_SIZE (htab);
9174 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9176 else if (htab->can_convert_all_inline_plt
9177 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
9178 ent->plt.offset = (bfd_vma) -1;
9182 ent->plt.offset = s->size;
9183 s->size += LOCAL_PLT_ENTRY_SIZE (htab);
9184 if (bfd_link_pic (info))
9185 htab->relpltlocal->size += sizeof (Elf64_External_Rela);
9189 ent->plt.offset = (bfd_vma) -1;
9193 /* Allocate global sym .plt and .got entries, and space for global
9194 sym dynamic relocs. */
9195 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9197 if (!htab->opd_abi && !bfd_link_pic (info))
9198 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9201 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9203 struct got_entry *ent;
9205 if (!is_ppc64_elf (ibfd))
9208 ent = ppc64_tlsld_got (ibfd);
9209 if (ent->got.refcount > 0)
9211 if (!htab->do_multi_toc && first_tlsld != NULL)
9213 ent->is_indirect = TRUE;
9214 ent->got.ent = first_tlsld;
9218 if (first_tlsld == NULL)
9220 s = ppc64_elf_tdata (ibfd)->got;
9221 ent->got.offset = s->size;
9224 if (bfd_link_pic (info))
9226 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9227 srel->size += sizeof (Elf64_External_Rela);
9232 ent->got.offset = (bfd_vma) -1;
9235 /* We now have determined the sizes of the various dynamic sections.
9236 Allocate memory for them. */
9238 for (s = dynobj->sections; s != NULL; s = s->next)
9240 if ((s->flags & SEC_LINKER_CREATED) == 0)
9243 if (s == htab->brlt || s == htab->relbrlt)
9244 /* These haven't been allocated yet; don't strip. */
9246 else if (s == htab->elf.sgot
9247 || s == htab->elf.splt
9248 || s == htab->elf.iplt
9249 || s == htab->pltlocal
9251 || s == htab->global_entry
9252 || s == htab->elf.sdynbss
9253 || s == htab->elf.sdynrelro)
9255 /* Strip this section if we don't need it; see the
9258 else if (s == htab->glink_eh_frame)
9260 if (!bfd_is_abs_section (s->output_section))
9261 /* Not sized yet. */
9264 else if (CONST_STRNEQ (s->name, ".rela"))
9268 if (s != htab->elf.srelplt)
9271 /* We use the reloc_count field as a counter if we need
9272 to copy relocs into the output file. */
9278 /* It's not one of our sections, so don't allocate space. */
9284 /* If we don't need this section, strip it from the
9285 output file. This is mostly to handle .rela.bss and
9286 .rela.plt. We must create both sections in
9287 create_dynamic_sections, because they must be created
9288 before the linker maps input sections to output
9289 sections. The linker does that before
9290 adjust_dynamic_symbol is called, and it is that
9291 function which decides whether anything needs to go
9292 into these sections. */
9293 s->flags |= SEC_EXCLUDE;
9297 if (bfd_is_abs_section (s->output_section))
9298 _bfd_error_handler (_("warning: discarding dynamic section %s"),
9301 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9304 /* Allocate memory for the section contents. We use bfd_zalloc
9305 here in case unused entries are not reclaimed before the
9306 section's contents are written out. This should not happen,
9307 but this way if it does we get a R_PPC64_NONE reloc in .rela
9308 sections instead of garbage.
9309 We also rely on the section contents being zero when writing
9310 the GOT and .dynrelro. */
9311 s->contents = bfd_zalloc (dynobj, s->size);
9312 if (s->contents == NULL)
9316 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9318 if (!is_ppc64_elf (ibfd))
9321 s = ppc64_elf_tdata (ibfd)->got;
9322 if (s != NULL && s != htab->elf.sgot)
9325 s->flags |= SEC_EXCLUDE;
9328 s->contents = bfd_zalloc (ibfd, s->size);
9329 if (s->contents == NULL)
9333 s = ppc64_elf_tdata (ibfd)->relgot;
9337 s->flags |= SEC_EXCLUDE;
9340 s->contents = bfd_zalloc (ibfd, s->size);
9341 if (s->contents == NULL)
9349 if (htab->elf.dynamic_sections_created)
9351 bfd_boolean tls_opt;
9353 /* Add some entries to the .dynamic section. We fill in the
9354 values later, in ppc64_elf_finish_dynamic_sections, but we
9355 must add the entries now so that we get the correct size for
9356 the .dynamic section. The DT_DEBUG entry is filled in by the
9357 dynamic linker and used by the debugger. */
9358 #define add_dynamic_entry(TAG, VAL) \
9359 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9361 if (bfd_link_executable (info))
9363 if (!add_dynamic_entry (DT_DEBUG, 0))
9367 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9369 if (!add_dynamic_entry (DT_PLTGOT, 0)
9370 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9371 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9372 || !add_dynamic_entry (DT_JMPREL, 0)
9373 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9377 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9379 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9380 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9384 tls_opt = (htab->params->tls_get_addr_opt
9385 && htab->tls_get_addr_fd != NULL
9386 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
9387 if (tls_opt || !htab->opd_abi)
9389 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
9395 if (!add_dynamic_entry (DT_RELA, 0)
9396 || !add_dynamic_entry (DT_RELASZ, 0)
9397 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9400 /* If any dynamic relocs apply to a read-only section,
9401 then we need a DT_TEXTREL entry. */
9402 if ((info->flags & DF_TEXTREL) == 0)
9403 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
9405 if ((info->flags & DF_TEXTREL) != 0)
9407 if (!add_dynamic_entry (DT_TEXTREL, 0))
9412 #undef add_dynamic_entry
9417 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
9420 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
9422 if (h->plt.plist != NULL
9424 && !h->pointer_equality_needed)
9427 return _bfd_elf_hash_symbol (h);
9430 /* Determine the type of stub needed, if any, for a call. */
9432 static inline enum ppc_stub_type
9433 ppc_type_of_stub (asection *input_sec,
9434 const Elf_Internal_Rela *rel,
9435 struct ppc_link_hash_entry **hash,
9436 struct plt_entry **plt_ent,
9437 bfd_vma destination,
9438 unsigned long local_off)
9440 struct ppc_link_hash_entry *h = *hash;
9442 bfd_vma branch_offset;
9443 bfd_vma max_branch_offset;
9444 enum elf_ppc64_reloc_type r_type;
9448 struct plt_entry *ent;
9449 struct ppc_link_hash_entry *fdh = h;
9451 && h->oh->is_func_descriptor)
9453 fdh = ppc_follow_link (h->oh);
9457 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9458 if (ent->addend == rel->r_addend
9459 && ent->plt.offset != (bfd_vma) -1)
9462 return ppc_stub_plt_call;
9465 /* Here, we know we don't have a plt entry. If we don't have a
9466 either a defined function descriptor or a defined entry symbol
9467 in a regular object file, then it is pointless trying to make
9468 any other type of stub. */
9469 if (!is_static_defined (&fdh->elf)
9470 && !is_static_defined (&h->elf))
9471 return ppc_stub_none;
9473 else if (elf_local_got_ents (input_sec->owner) != NULL)
9475 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9476 struct plt_entry **local_plt = (struct plt_entry **)
9477 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9478 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9480 if (local_plt[r_symndx] != NULL)
9482 struct plt_entry *ent;
9484 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9485 if (ent->addend == rel->r_addend
9486 && ent->plt.offset != (bfd_vma) -1)
9489 return ppc_stub_plt_call;
9494 /* Determine where the call point is. */
9495 location = (input_sec->output_offset
9496 + input_sec->output_section->vma
9499 branch_offset = destination - location;
9500 r_type = ELF64_R_TYPE (rel->r_info);
9502 /* Determine if a long branch stub is needed. */
9503 max_branch_offset = 1 << 25;
9504 if (r_type == R_PPC64_REL14
9505 || r_type == R_PPC64_REL14_BRTAKEN
9506 || r_type == R_PPC64_REL14_BRNTAKEN)
9507 max_branch_offset = 1 << 15;
9509 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
9510 /* We need a stub. Figure out whether a long_branch or plt_branch
9512 return ppc_stub_long_branch;
9514 return ppc_stub_none;
9517 /* Gets the address of a label (1:) in r11 and builds an offset in r12,
9518 then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true).
9523 . lis %r12,xxx-1b@highest
9524 . ori %r12,%r12,xxx-1b@higher
9526 . oris %r12,%r12,xxx-1b@high
9527 . ori %r12,%r12,xxx-1b@l
9528 . add/ldx %r12,%r11,%r12 */
9531 build_offset (bfd *abfd, bfd_byte *p, bfd_vma off, bfd_boolean load)
9533 bfd_put_32 (abfd, MFLR_R12, p);
9535 bfd_put_32 (abfd, BCL_20_31, p);
9537 bfd_put_32 (abfd, MFLR_R11, p);
9539 bfd_put_32 (abfd, MTLR_R12, p);
9541 if (off + 0x8000 < 0x10000)
9544 bfd_put_32 (abfd, LD_R12_0R11 + PPC_LO (off), p);
9546 bfd_put_32 (abfd, ADDI_R12_R11 + PPC_LO (off), p);
9549 else if (off + 0x80008000ULL < 0x100000000ULL)
9551 bfd_put_32 (abfd, ADDIS_R12_R11 + PPC_HA (off), p);
9554 bfd_put_32 (abfd, LD_R12_0R12 + PPC_LO (off), p);
9556 bfd_put_32 (abfd, ADDI_R12_R12 + PPC_LO (off), p);
9561 if (off + 0x800000000000ULL < 0x1000000000000ULL)
9563 bfd_put_32 (abfd, LI_R12_0 + ((off >> 32) & 0xffff), p);
9568 bfd_put_32 (abfd, LIS_R12 + ((off >> 48) & 0xffff), p);
9570 if (((off >> 32) & 0xffff) != 0)
9572 bfd_put_32 (abfd, ORI_R12_R12_0 + ((off >> 32) & 0xffff), p);
9576 if (((off >> 32) & 0xffffffffULL) != 0)
9578 bfd_put_32 (abfd, SLDI_R12_R12_32, p);
9581 if (PPC_HI (off) != 0)
9583 bfd_put_32 (abfd, ORIS_R12_R12_0 + PPC_HI (off), p);
9586 if (PPC_LO (off) != 0)
9588 bfd_put_32 (abfd, ORI_R12_R12_0 + PPC_LO (off), p);
9592 bfd_put_32 (abfd, LDX_R12_R11_R12, p);
9594 bfd_put_32 (abfd, ADD_R12_R11_R12, p);
9601 size_offset (bfd_vma off)
9604 if (off + 0x8000 < 0x10000)
9606 else if (off + 0x80008000ULL < 0x100000000ULL)
9610 if (off + 0x800000000000ULL < 0x1000000000000ULL)
9615 if (((off >> 32) & 0xffff) != 0)
9618 if (((off >> 32) & 0xffffffffULL) != 0)
9620 if (PPC_HI (off) != 0)
9622 if (PPC_LO (off) != 0)
9630 num_relocs_for_offset (bfd_vma off)
9632 unsigned int num_rel;
9633 if (off + 0x8000 < 0x10000)
9635 else if (off + 0x80008000ULL < 0x100000000ULL)
9640 if (off + 0x800000000000ULL >= 0x1000000000000ULL
9641 && ((off >> 32) & 0xffff) != 0)
9643 if (PPC_HI (off) != 0)
9645 if (PPC_LO (off) != 0)
9651 static Elf_Internal_Rela *
9652 emit_relocs_for_offset (struct bfd_link_info *info, Elf_Internal_Rela *r,
9653 bfd_vma roff, bfd_vma targ, bfd_vma off)
9655 bfd_vma relative_targ = targ - (roff - 8);
9656 if (bfd_big_endian (info->output_bfd))
9659 r->r_addend = relative_targ + roff;
9660 if (off + 0x8000 < 0x10000)
9661 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16);
9662 else if (off + 0x80008000ULL < 0x100000000ULL)
9664 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HA);
9668 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO);
9669 r->r_addend = relative_targ + roff;
9673 if (off + 0x800000000000ULL < 0x1000000000000ULL)
9674 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER);
9677 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHEST);
9678 if (((off >> 32) & 0xffff) != 0)
9683 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER);
9684 r->r_addend = relative_targ + roff;
9687 if (((off >> 32) & 0xffffffffULL) != 0)
9689 if (PPC_HI (off) != 0)
9694 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGH);
9695 r->r_addend = relative_targ + roff;
9697 if (PPC_LO (off) != 0)
9702 r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO);
9703 r->r_addend = relative_targ + roff;
9709 /* Emit .eh_frame opcode to advance pc by DELTA. */
9712 eh_advance (bfd *abfd, bfd_byte *eh, unsigned int delta)
9716 *eh++ = DW_CFA_advance_loc + delta;
9717 else if (delta < 256)
9719 *eh++ = DW_CFA_advance_loc1;
9722 else if (delta < 65536)
9724 *eh++ = DW_CFA_advance_loc2;
9725 bfd_put_16 (abfd, delta, eh);
9730 *eh++ = DW_CFA_advance_loc4;
9731 bfd_put_32 (abfd, delta, eh);
9737 /* Size of required .eh_frame opcode to advance pc by DELTA. */
9740 eh_advance_size (unsigned int delta)
9743 /* DW_CFA_advance_loc+[1..63]. */
9745 if (delta < 256 * 4)
9746 /* DW_CFA_advance_loc1, byte. */
9748 if (delta < 65536 * 4)
9749 /* DW_CFA_advance_loc2, 2 bytes. */
9751 /* DW_CFA_advance_loc4, 4 bytes. */
9755 /* With power7 weakly ordered memory model, it is possible for ld.so
9756 to update a plt entry in one thread and have another thread see a
9757 stale zero toc entry. To avoid this we need some sort of acquire
9758 barrier in the call stub. One solution is to make the load of the
9759 toc word seem to appear to depend on the load of the function entry
9760 word. Another solution is to test for r2 being zero, and branch to
9761 the appropriate glink entry if so.
9763 . fake dep barrier compare
9764 . ld 12,xxx(2) ld 12,xxx(2)
9766 . xor 11,12,12 ld 2,xxx+8(2)
9767 . add 2,2,11 cmpldi 2,0
9768 . ld 2,xxx+8(2) bnectr+
9769 . bctr b <glink_entry>
9771 The solution involving the compare turns out to be faster, so
9772 that's what we use unless the branch won't reach. */
9774 #define ALWAYS_USE_FAKE_DEP 0
9775 #define ALWAYS_EMIT_R2SAVE 0
9777 static inline unsigned int
9778 plt_stub_size (struct ppc_link_hash_table *htab,
9779 struct ppc_stub_hash_entry *stub_entry,
9784 if (stub_entry->stub_type >= ppc_stub_plt_call_notoc)
9786 size = 8 + size_offset (off - 8);
9787 if (stub_entry->stub_type > ppc_stub_plt_call_notoc)
9793 if (ALWAYS_EMIT_R2SAVE
9794 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9796 if (PPC_HA (off) != 0)
9801 if (htab->params->plt_static_chain)
9803 if (htab->params->plt_thread_safe
9804 && htab->elf.dynamic_sections_created
9805 && stub_entry->h != NULL
9806 && stub_entry->h->elf.dynindx != -1)
9808 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
9811 if (stub_entry->h != NULL
9812 && (stub_entry->h == htab->tls_get_addr_fd
9813 || stub_entry->h == htab->tls_get_addr)
9814 && htab->params->tls_get_addr_opt)
9817 if (stub_entry->stub_type == ppc_stub_plt_call_r2save)
9823 /* Depending on the sign of plt_stub_align:
9824 If positive, return the padding to align to a 2**plt_stub_align
9826 If negative, if this stub would cross fewer 2**plt_stub_align
9827 boundaries if we align, then return the padding needed to do so. */
9829 static inline unsigned int
9830 plt_stub_pad (struct ppc_link_hash_table *htab,
9831 struct ppc_stub_hash_entry *stub_entry,
9836 bfd_vma stub_off = stub_entry->group->stub_sec->size;
9838 if (htab->params->plt_stub_align >= 0)
9840 stub_align = 1 << htab->params->plt_stub_align;
9841 if ((stub_off & (stub_align - 1)) != 0)
9842 return stub_align - (stub_off & (stub_align - 1));
9846 stub_align = 1 << -htab->params->plt_stub_align;
9847 stub_size = plt_stub_size (htab, stub_entry, plt_off);
9848 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9849 > ((stub_size - 1) & -stub_align))
9850 return stub_align - (stub_off & (stub_align - 1));
9854 /* Build a .plt call stub. */
9856 static inline bfd_byte *
9857 build_plt_stub (struct ppc_link_hash_table *htab,
9858 struct ppc_stub_hash_entry *stub_entry,
9859 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9861 bfd *obfd = htab->params->stub_bfd;
9862 bfd_boolean plt_load_toc = htab->opd_abi;
9863 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
9864 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
9865 && htab->elf.dynamic_sections_created
9866 && stub_entry->h != NULL
9867 && stub_entry->h->elf.dynindx != -1);
9868 bfd_boolean use_fake_dep = plt_thread_safe;
9869 bfd_vma cmp_branch_off = 0;
9871 if (!ALWAYS_USE_FAKE_DEP
9874 && !((stub_entry->h == htab->tls_get_addr_fd
9875 || stub_entry->h == htab->tls_get_addr)
9876 && htab->params->tls_get_addr_opt))
9878 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9879 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
9880 / PLT_ENTRY_SIZE (htab));
9881 bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8;
9884 if (pltindex > 32768)
9885 glinkoff += (pltindex - 32768) * 4;
9887 + htab->glink->output_offset
9888 + htab->glink->output_section->vma);
9889 from = (p - stub_entry->group->stub_sec->contents
9890 + 4 * (ALWAYS_EMIT_R2SAVE
9891 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9892 + 4 * (PPC_HA (offset) != 0)
9893 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9895 + 4 * (plt_static_chain != 0)
9897 + stub_entry->group->stub_sec->output_offset
9898 + stub_entry->group->stub_sec->output_section->vma);
9899 cmp_branch_off = to - from;
9900 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9903 if (PPC_HA (offset) != 0)
9907 if (ALWAYS_EMIT_R2SAVE
9908 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9910 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9911 r[1].r_offset = r[0].r_offset + 4;
9912 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9913 r[1].r_addend = r[0].r_addend;
9916 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9918 r[2].r_offset = r[1].r_offset + 4;
9919 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9920 r[2].r_addend = r[0].r_addend;
9924 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9925 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9926 r[2].r_addend = r[0].r_addend + 8;
9927 if (plt_static_chain)
9929 r[3].r_offset = r[2].r_offset + 4;
9930 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9931 r[3].r_addend = r[0].r_addend + 16;
9936 if (ALWAYS_EMIT_R2SAVE
9937 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9938 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
9941 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
9942 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
9946 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9947 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
9950 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9952 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
9955 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
9960 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
9961 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
9963 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
9964 if (plt_static_chain)
9965 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
9972 if (ALWAYS_EMIT_R2SAVE
9973 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9975 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9978 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9980 r[1].r_offset = r[0].r_offset + 4;
9981 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9982 r[1].r_addend = r[0].r_addend;
9986 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9987 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9988 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9989 if (plt_static_chain)
9991 r[2].r_offset = r[1].r_offset + 4;
9992 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9993 r[2].r_addend = r[0].r_addend + 8;
9998 if (ALWAYS_EMIT_R2SAVE
9999 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10000 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10001 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10003 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10005 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10008 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10013 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10014 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10016 if (plt_static_chain)
10017 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10018 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10021 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10023 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10024 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10025 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10028 bfd_put_32 (obfd, BCTR, p), p += 4;
10032 /* Build a special .plt call stub for __tls_get_addr. */
10034 #define LD_R11_0R3 0xe9630000
10035 #define LD_R12_0R3 0xe9830000
10036 #define MR_R0_R3 0x7c601b78
10037 #define CMPDI_R11_0 0x2c2b0000
10038 #define ADD_R3_R12_R13 0x7c6c6a14
10039 #define BEQLR 0x4d820020
10040 #define MR_R3_R0 0x7c030378
10041 #define STD_R11_0R1 0xf9610000
10042 #define BCTRL 0x4e800421
10043 #define LD_R11_0R1 0xe9610000
10044 #define MTLR_R11 0x7d6803a6
10046 static inline bfd_byte *
10047 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10048 struct ppc_stub_hash_entry *stub_entry,
10049 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10051 bfd *obfd = htab->params->stub_bfd;
10054 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10055 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10056 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10057 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10058 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10059 bfd_put_32 (obfd, BEQLR, p), p += 4;
10060 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10062 r[0].r_offset += 7 * 4;
10063 if (stub_entry->stub_type != ppc_stub_plt_call_r2save)
10064 return build_plt_stub (htab, stub_entry, p, offset, r);
10066 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10067 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10070 r[0].r_offset += 2 * 4;
10071 p = build_plt_stub (htab, stub_entry, p, offset, r);
10072 bfd_put_32 (obfd, BCTRL, p - 4);
10074 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10075 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10076 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10077 bfd_put_32 (obfd, BLR, p), p += 4;
10079 if (htab->glink_eh_frame != NULL
10080 && htab->glink_eh_frame->size != 0)
10082 bfd_byte *base, *eh;
10083 unsigned int lr_used, delta;
10085 base = htab->glink_eh_frame->contents + stub_entry->group->eh_base + 17;
10086 eh = base + stub_entry->group->eh_size;
10087 lr_used = stub_entry->stub_offset + (p - 20 - loc);
10088 delta = lr_used - stub_entry->group->lr_restore;
10089 stub_entry->group->lr_restore = lr_used + 16;
10090 eh = eh_advance (htab->elf.dynobj, eh, delta);
10091 *eh++ = DW_CFA_offset_extended_sf;
10093 *eh++ = -(STK_LINKER (htab) / 8) & 0x7f;
10094 *eh++ = DW_CFA_advance_loc + 4;
10095 *eh++ = DW_CFA_restore_extended;
10097 stub_entry->group->eh_size = eh - base;
10102 static Elf_Internal_Rela *
10103 get_relocs (asection *sec, int count)
10105 Elf_Internal_Rela *relocs;
10106 struct bfd_elf_section_data *elfsec_data;
10108 elfsec_data = elf_section_data (sec);
10109 relocs = elfsec_data->relocs;
10110 if (relocs == NULL)
10112 bfd_size_type relsize;
10113 relsize = sec->reloc_count * sizeof (*relocs);
10114 relocs = bfd_alloc (sec->owner, relsize);
10115 if (relocs == NULL)
10117 elfsec_data->relocs = relocs;
10118 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10119 sizeof (Elf_Internal_Shdr));
10120 if (elfsec_data->rela.hdr == NULL)
10122 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10123 * sizeof (Elf64_External_Rela));
10124 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10125 sec->reloc_count = 0;
10127 relocs += sec->reloc_count;
10128 sec->reloc_count += count;
10132 /* Convert the relocs R[0] thru R[-NUM_REL+1], which are all no-symbol
10133 forms, to the equivalent relocs against the global symbol given by
10137 use_global_in_relocs (struct ppc_link_hash_table *htab,
10138 struct ppc_stub_hash_entry *stub_entry,
10139 Elf_Internal_Rela *r, unsigned int num_rel)
10141 struct elf_link_hash_entry **hashes;
10142 unsigned long symndx;
10143 struct ppc_link_hash_entry *h;
10146 /* Relocs are always against symbols in their own object file. Fake
10147 up global sym hashes for the stub bfd (which has no symbols). */
10148 hashes = elf_sym_hashes (htab->params->stub_bfd);
10149 if (hashes == NULL)
10151 bfd_size_type hsize;
10153 /* When called the first time, stub_globals will contain the
10154 total number of symbols seen during stub sizing. After
10155 allocating, stub_globals is used as an index to fill the
10157 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10158 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10159 if (hashes == NULL)
10161 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10162 htab->stub_globals = 1;
10164 symndx = htab->stub_globals++;
10166 hashes[symndx] = &h->elf;
10167 if (h->oh != NULL && h->oh->is_func)
10168 h = ppc_follow_link (h->oh);
10169 BFD_ASSERT (h->elf.root.type == bfd_link_hash_defined
10170 || h->elf.root.type == bfd_link_hash_defweak);
10171 symval = (h->elf.root.u.def.value
10172 + h->elf.root.u.def.section->output_offset
10173 + h->elf.root.u.def.section->output_section->vma);
10174 while (num_rel-- != 0)
10176 r->r_info = ELF64_R_INFO (symndx, ELF64_R_TYPE (r->r_info));
10177 if (h->elf.root.u.def.section != stub_entry->target_section)
10179 /* H is an opd symbol. The addend must be zero, and the
10180 branch reloc is the only one we can convert. */
10185 r->r_addend -= symval;
10192 get_r2off (struct bfd_link_info *info,
10193 struct ppc_stub_hash_entry *stub_entry)
10195 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10196 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10200 /* Support linking -R objects. Get the toc pointer from the
10203 if (!htab->opd_abi)
10205 asection *opd = stub_entry->h->elf.root.u.def.section;
10206 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10208 if (strcmp (opd->name, ".opd") != 0
10209 || opd->reloc_count != 0)
10211 info->callbacks->einfo
10212 (_("%P: cannot find opd entry toc for `%pT'\n"),
10213 stub_entry->h->elf.root.root.string);
10214 bfd_set_error (bfd_error_bad_value);
10215 return (bfd_vma) -1;
10217 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10218 return (bfd_vma) -1;
10219 r2off = bfd_get_64 (opd->owner, buf);
10220 r2off -= elf_gp (info->output_bfd);
10222 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10227 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10229 struct ppc_stub_hash_entry *stub_entry;
10230 struct ppc_branch_hash_entry *br_entry;
10231 struct bfd_link_info *info;
10232 struct ppc_link_hash_table *htab;
10234 bfd_byte *p, *relp;
10236 Elf_Internal_Rela *r;
10240 /* Massage our args to the form they really have. */
10241 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10244 htab = ppc_hash_table (info);
10248 BFD_ASSERT (stub_entry->stub_offset >= stub_entry->group->stub_sec->size);
10249 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10251 htab->stub_count[stub_entry->stub_type - 1] += 1;
10252 switch (stub_entry->stub_type)
10254 case ppc_stub_long_branch:
10255 case ppc_stub_long_branch_r2off:
10256 /* Branches are relative. This is where we are going to. */
10257 targ = (stub_entry->target_value
10258 + stub_entry->target_section->output_offset
10259 + stub_entry->target_section->output_section->vma);
10260 targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10262 /* And this is where we are coming from. */
10263 off = (stub_entry->stub_offset
10264 + stub_entry->group->stub_sec->output_offset
10265 + stub_entry->group->stub_sec->output_section->vma);
10269 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10271 bfd_vma r2off = get_r2off (info, stub_entry);
10273 if (r2off == (bfd_vma) -1)
10275 htab->stub_error = TRUE;
10278 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
10280 if (PPC_HA (r2off) != 0)
10282 bfd_put_32 (htab->params->stub_bfd,
10283 ADDIS_R2_R2 | PPC_HA (r2off), p);
10286 if (PPC_LO (r2off) != 0)
10288 bfd_put_32 (htab->params->stub_bfd,
10289 ADDI_R2_R2 | PPC_LO (r2off), p);
10294 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p);
10297 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10300 (_("long branch stub `%s' offset overflow"),
10301 stub_entry->root.string);
10302 htab->stub_error = TRUE;
10306 if (info->emitrelocations)
10308 r = get_relocs (stub_entry->group->stub_sec, 1);
10311 r->r_offset = p - 4 - stub_entry->group->stub_sec->contents;
10312 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10313 r->r_addend = targ;
10314 if (stub_entry->h != NULL
10315 && !use_global_in_relocs (htab, stub_entry, r, 1))
10320 case ppc_stub_plt_branch:
10321 case ppc_stub_plt_branch_r2off:
10322 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10323 stub_entry->root.string + 9,
10325 if (br_entry == NULL)
10327 _bfd_error_handler (_("can't find branch stub `%s'"),
10328 stub_entry->root.string);
10329 htab->stub_error = TRUE;
10333 targ = (stub_entry->target_value
10334 + stub_entry->target_section->output_offset
10335 + stub_entry->target_section->output_section->vma);
10336 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10337 targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10339 bfd_put_64 (htab->brlt->owner, targ,
10340 htab->brlt->contents + br_entry->offset);
10342 if (br_entry->iter == htab->stub_iteration)
10344 br_entry->iter = 0;
10346 if (htab->relbrlt != NULL)
10348 /* Create a reloc for the branch lookup table entry. */
10349 Elf_Internal_Rela rela;
10352 rela.r_offset = (br_entry->offset
10353 + htab->brlt->output_offset
10354 + htab->brlt->output_section->vma);
10355 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10356 rela.r_addend = targ;
10358 rl = htab->relbrlt->contents;
10359 rl += (htab->relbrlt->reloc_count++
10360 * sizeof (Elf64_External_Rela));
10361 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10363 else if (info->emitrelocations)
10365 r = get_relocs (htab->brlt, 1);
10368 /* brlt, being SEC_LINKER_CREATED does not go through the
10369 normal reloc processing. Symbols and offsets are not
10370 translated from input file to output file form, so
10371 set up the offset per the output file. */
10372 r->r_offset = (br_entry->offset
10373 + htab->brlt->output_offset
10374 + htab->brlt->output_section->vma);
10375 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10376 r->r_addend = targ;
10380 targ = (br_entry->offset
10381 + htab->brlt->output_offset
10382 + htab->brlt->output_section->vma);
10384 off = (elf_gp (info->output_bfd)
10385 + htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10388 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10390 info->callbacks->einfo
10391 (_("%P: linkage table error against `%pT'\n"),
10392 stub_entry->root.string);
10393 bfd_set_error (bfd_error_bad_value);
10394 htab->stub_error = TRUE;
10398 if (info->emitrelocations)
10400 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
10403 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10404 if (bfd_big_endian (info->output_bfd))
10405 r[0].r_offset += 2;
10406 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10407 r[0].r_offset += 4;
10408 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10409 r[0].r_addend = targ;
10410 if (PPC_HA (off) != 0)
10412 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10413 r[1].r_offset = r[0].r_offset + 4;
10414 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10415 r[1].r_addend = r[0].r_addend;
10420 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10422 if (PPC_HA (off) != 0)
10424 bfd_put_32 (htab->params->stub_bfd,
10425 ADDIS_R12_R2 | PPC_HA (off), p);
10427 bfd_put_32 (htab->params->stub_bfd,
10428 LD_R12_0R12 | PPC_LO (off), p);
10431 bfd_put_32 (htab->params->stub_bfd,
10432 LD_R12_0R2 | PPC_LO (off), p);
10436 bfd_vma r2off = get_r2off (info, stub_entry);
10438 if (r2off == (bfd_vma) -1)
10440 htab->stub_error = TRUE;
10444 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
10446 if (PPC_HA (off) != 0)
10448 bfd_put_32 (htab->params->stub_bfd,
10449 ADDIS_R12_R2 | PPC_HA (off), p);
10451 bfd_put_32 (htab->params->stub_bfd,
10452 LD_R12_0R12 | PPC_LO (off), p);
10455 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p);
10457 if (PPC_HA (r2off) != 0)
10460 bfd_put_32 (htab->params->stub_bfd,
10461 ADDIS_R2_R2 | PPC_HA (r2off), p);
10463 if (PPC_LO (r2off) != 0)
10466 bfd_put_32 (htab->params->stub_bfd,
10467 ADDI_R2_R2 | PPC_LO (r2off), p);
10471 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
10473 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
10477 case ppc_stub_long_branch_notoc:
10478 case ppc_stub_long_branch_both:
10479 case ppc_stub_plt_branch_notoc:
10480 case ppc_stub_plt_branch_both:
10481 case ppc_stub_plt_call_notoc:
10482 case ppc_stub_plt_call_both:
10484 off = (stub_entry->stub_offset
10485 + stub_entry->group->stub_sec->output_offset
10486 + stub_entry->group->stub_sec->output_section->vma);
10487 if (stub_entry->stub_type == ppc_stub_long_branch_both
10488 || stub_entry->stub_type == ppc_stub_plt_branch_both
10489 || stub_entry->stub_type == ppc_stub_plt_call_both)
10492 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
10495 if (stub_entry->stub_type >= ppc_stub_plt_call_notoc)
10497 targ = stub_entry->plt_ent->plt.offset & ~1;
10498 if (targ >= (bfd_vma) -2)
10501 plt = htab->elf.splt;
10502 if (!htab->elf.dynamic_sections_created
10503 || stub_entry->h == NULL
10504 || stub_entry->h->elf.dynindx == -1)
10506 if (stub_entry->symtype == STT_GNU_IFUNC)
10507 plt = htab->elf.iplt;
10509 plt = htab->pltlocal;
10511 targ += plt->output_offset + plt->output_section->vma;
10514 targ = (stub_entry->target_value
10515 + stub_entry->target_section->output_offset
10516 + stub_entry->target_section->output_section->vma);
10521 /* The notoc stubs calculate their target (either a PLT entry or
10522 the global entry point of a function) relative to the PC
10523 returned by the "bcl" two instructions past the start of the
10524 sequence emitted by build_offset. The offset is therefore 8
10525 less than calculated from the start of the sequence. */
10527 p = build_offset (htab->params->stub_bfd, p, off,
10528 stub_entry->stub_type >= ppc_stub_plt_call_notoc);
10529 if (stub_entry->stub_type <= ppc_stub_long_branch_both)
10533 from = (stub_entry->stub_offset
10534 + stub_entry->group->stub_sec->output_offset
10535 + stub_entry->group->stub_sec->output_section->vma
10537 bfd_put_32 (htab->params->stub_bfd,
10538 B_DOT | ((targ - from) & 0x3fffffc), p);
10542 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
10544 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
10548 if (info->emitrelocations)
10551 num_rel += num_relocs_for_offset (off);
10552 r = get_relocs (stub_entry->group->stub_sec, num_rel);
10555 roff = relp + 16 - stub_entry->group->stub_sec->contents;
10556 r = emit_relocs_for_offset (info, r, roff, targ, off);
10557 if (stub_entry->stub_type == ppc_stub_long_branch_notoc
10558 || stub_entry->stub_type == ppc_stub_long_branch_both)
10561 roff = p - 4 - stub_entry->group->stub_sec->contents;
10562 r->r_offset = roff;
10563 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10564 r->r_addend = targ;
10565 if (stub_entry->h != NULL
10566 && !use_global_in_relocs (htab, stub_entry, r, num_rel))
10571 if (htab->glink_eh_frame != NULL
10572 && htab->glink_eh_frame->size != 0)
10574 bfd_byte *base, *eh;
10575 unsigned int lr_used, delta;
10577 base = (htab->glink_eh_frame->contents
10578 + stub_entry->group->eh_base + 17);
10579 eh = base + stub_entry->group->eh_size;
10580 lr_used = stub_entry->stub_offset + 8;
10581 if (stub_entry->stub_type == ppc_stub_long_branch_both
10582 || stub_entry->stub_type == ppc_stub_plt_branch_both
10583 || stub_entry->stub_type == ppc_stub_plt_call_both)
10585 delta = lr_used - stub_entry->group->lr_restore;
10586 stub_entry->group->lr_restore = lr_used + 8;
10587 eh = eh_advance (htab->elf.dynobj, eh, delta);
10588 *eh++ = DW_CFA_register;
10591 *eh++ = DW_CFA_advance_loc + 2;
10592 *eh++ = DW_CFA_restore_extended;
10594 stub_entry->group->eh_size = eh - base;
10598 case ppc_stub_plt_call:
10599 case ppc_stub_plt_call_r2save:
10600 if (stub_entry->h != NULL
10601 && stub_entry->h->is_func_descriptor
10602 && stub_entry->h->oh != NULL)
10604 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10606 /* If the old-ABI "dot-symbol" is undefined make it weak so
10607 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
10608 if (fh->elf.root.type == bfd_link_hash_undefined
10609 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
10610 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
10611 fh->elf.root.type = bfd_link_hash_undefweak;
10614 /* Now build the stub. */
10615 targ = stub_entry->plt_ent->plt.offset & ~1;
10616 if (targ >= (bfd_vma) -2)
10619 plt = htab->elf.splt;
10620 if (!htab->elf.dynamic_sections_created
10621 || stub_entry->h == NULL
10622 || stub_entry->h->elf.dynindx == -1)
10624 if (stub_entry->symtype == STT_GNU_IFUNC)
10625 plt = htab->elf.iplt;
10627 plt = htab->pltlocal;
10629 targ += plt->output_offset + plt->output_section->vma;
10631 off = (elf_gp (info->output_bfd)
10632 + htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10635 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10637 info->callbacks->einfo
10638 /* xgettext:c-format */
10639 (_("%P: linkage table error against `%pT'\n"),
10640 stub_entry->h != NULL
10641 ? stub_entry->h->elf.root.root.string
10643 bfd_set_error (bfd_error_bad_value);
10644 htab->stub_error = TRUE;
10649 if (info->emitrelocations)
10651 r = get_relocs (stub_entry->group->stub_sec,
10652 ((PPC_HA (off) != 0)
10654 ? 2 + (htab->params->plt_static_chain
10655 && PPC_HA (off + 16) == PPC_HA (off))
10659 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
10660 if (bfd_big_endian (info->output_bfd))
10661 r[0].r_offset += 2;
10662 r[0].r_addend = targ;
10664 if (stub_entry->h != NULL
10665 && (stub_entry->h == htab->tls_get_addr_fd
10666 || stub_entry->h == htab->tls_get_addr)
10667 && htab->params->tls_get_addr_opt)
10668 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10670 p = build_plt_stub (htab, stub_entry, loc, off, r);
10673 case ppc_stub_save_res:
10681 stub_entry->group->stub_sec->size = stub_entry->stub_offset + (p - loc);
10683 if (htab->params->emit_stub_syms)
10685 struct elf_link_hash_entry *h;
10688 const char *const stub_str[] = { "long_branch",
10701 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10702 len2 = strlen (stub_entry->root.string);
10703 name = bfd_malloc (len1 + len2 + 2);
10706 memcpy (name, stub_entry->root.string, 9);
10707 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10708 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10709 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10712 if (h->root.type == bfd_link_hash_new)
10714 h->root.type = bfd_link_hash_defined;
10715 h->root.u.def.section = stub_entry->group->stub_sec;
10716 h->root.u.def.value = stub_entry->stub_offset;
10717 h->ref_regular = 1;
10718 h->def_regular = 1;
10719 h->ref_regular_nonweak = 1;
10720 h->forced_local = 1;
10722 h->root.linker_def = 1;
10729 /* As above, but don't actually build the stub. Just bump offset so
10730 we know stub section sizes, and select plt_branch stubs where
10731 long_branch stubs won't do. */
10734 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10736 struct ppc_stub_hash_entry *stub_entry;
10737 struct bfd_link_info *info;
10738 struct ppc_link_hash_table *htab;
10740 bfd_vma targ, off, r2off;
10741 unsigned int size, extra, lr_used, delta;
10743 /* Massage our args to the form they really have. */
10744 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10747 htab = ppc_hash_table (info);
10751 /* Make a note of the offset within the stubs for this entry. */
10752 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10754 if (stub_entry->h != NULL
10755 && stub_entry->h->save_res
10756 && stub_entry->h->elf.root.type == bfd_link_hash_defined
10757 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
10759 /* Don't make stubs to out-of-line register save/restore
10760 functions. Instead, emit copies of the functions. */
10761 stub_entry->group->needs_save_res = 1;
10762 stub_entry->stub_type = ppc_stub_save_res;
10766 switch (stub_entry->stub_type)
10768 case ppc_stub_plt_branch:
10769 case ppc_stub_plt_branch_r2off:
10770 /* Reset the stub type from the plt branch variant in case we now
10771 can reach with a shorter stub. */
10772 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10773 /* Fall through. */
10774 case ppc_stub_long_branch:
10775 case ppc_stub_long_branch_r2off:
10776 targ = (stub_entry->target_value
10777 + stub_entry->target_section->output_offset
10778 + stub_entry->target_section->output_section->vma);
10779 targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10780 off = (stub_entry->stub_offset
10781 + stub_entry->group->stub_sec->output_offset
10782 + stub_entry->group->stub_sec->output_section->vma);
10786 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10788 r2off = get_r2off (info, stub_entry);
10789 if (r2off == (bfd_vma) -1)
10791 htab->stub_error = TRUE;
10795 if (PPC_HA (r2off) != 0)
10797 if (PPC_LO (r2off) != 0)
10803 /* If the branch offset is too big, use a ppc_stub_plt_branch.
10804 Do the same for -R objects without function descriptors. */
10805 if ((stub_entry->stub_type == ppc_stub_long_branch_r2off
10807 && htab->sec_info[stub_entry->target_section->id].toc_off == 0)
10808 || off + (1 << 25) >= (bfd_vma) (1 << 26))
10810 struct ppc_branch_hash_entry *br_entry;
10812 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10813 stub_entry->root.string + 9,
10815 if (br_entry == NULL)
10817 _bfd_error_handler (_("can't build branch stub `%s'"),
10818 stub_entry->root.string);
10819 htab->stub_error = TRUE;
10823 if (br_entry->iter != htab->stub_iteration)
10825 br_entry->iter = htab->stub_iteration;
10826 br_entry->offset = htab->brlt->size;
10827 htab->brlt->size += 8;
10829 if (htab->relbrlt != NULL)
10830 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10831 else if (info->emitrelocations)
10833 htab->brlt->reloc_count += 1;
10834 htab->brlt->flags |= SEC_RELOC;
10838 targ = (br_entry->offset
10839 + htab->brlt->output_offset
10840 + htab->brlt->output_section->vma);
10841 off = (elf_gp (info->output_bfd)
10842 + htab->sec_info[stub_entry->group->link_sec->id].toc_off);
10845 if (info->emitrelocations)
10847 stub_entry->group->stub_sec->reloc_count
10848 += 1 + (PPC_HA (off) != 0);
10849 stub_entry->group->stub_sec->flags |= SEC_RELOC;
10852 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10853 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10856 if (PPC_HA (off) != 0)
10862 if (PPC_HA (off) != 0)
10865 if (PPC_HA (r2off) != 0)
10867 if (PPC_LO (r2off) != 0)
10871 else if (info->emitrelocations)
10873 stub_entry->group->stub_sec->reloc_count += 1;
10874 stub_entry->group->stub_sec->flags |= SEC_RELOC;
10878 case ppc_stub_plt_branch_notoc:
10879 case ppc_stub_plt_branch_both:
10880 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10881 /* Fall through. */
10882 case ppc_stub_long_branch_notoc:
10883 case ppc_stub_long_branch_both:
10884 off = (stub_entry->stub_offset
10885 + stub_entry->group->stub_sec->output_offset
10886 + stub_entry->group->stub_sec->output_section->vma);
10888 if (stub_entry->stub_type == ppc_stub_long_branch_both)
10891 targ = (stub_entry->target_value
10892 + stub_entry->target_section->output_offset
10893 + stub_entry->target_section->output_section->vma);
10896 if (info->emitrelocations)
10898 stub_entry->group->stub_sec->reloc_count
10899 += num_relocs_for_offset (off);
10900 stub_entry->group->stub_sec->flags |= SEC_RELOC;
10903 extra = size_offset (off - 8);
10904 /* Include branch insn plus those in the offset sequence. */
10906 /* The branch insn is at the end, or "extra" bytes along. So
10907 its offset will be "extra" bytes less that that already
10911 /* After the bcl, lr has been modified so we need to emit
10912 .eh_frame info saying the return address is in r12. */
10913 lr_used = stub_entry->stub_offset + 8;
10914 if (stub_entry->stub_type == ppc_stub_long_branch_both)
10916 /* The eh_frame info will consist of a DW_CFA_advance_loc or
10917 variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2,
10918 DW_CFA_restore_extended 65. */
10919 delta = lr_used - stub_entry->group->lr_restore;
10920 stub_entry->group->eh_size += eh_advance_size (delta) + 6;
10921 stub_entry->group->lr_restore = lr_used + 8;
10923 /* If the branch can't reach, use a plt_branch. */
10924 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10926 stub_entry->stub_type += (ppc_stub_plt_branch_notoc
10927 - ppc_stub_long_branch_notoc);
10930 else if (info->emitrelocations)
10931 stub_entry->group->stub_sec->reloc_count +=1;
10934 case ppc_stub_plt_call_notoc:
10935 case ppc_stub_plt_call_both:
10936 off = (stub_entry->stub_offset
10937 + stub_entry->group->stub_sec->output_offset
10938 + stub_entry->group->stub_sec->output_section->vma);
10939 if (stub_entry->stub_type == ppc_stub_plt_call_both)
10941 targ = stub_entry->plt_ent->plt.offset & ~1;
10942 if (targ >= (bfd_vma) -2)
10945 plt = htab->elf.splt;
10946 if (!htab->elf.dynamic_sections_created
10947 || stub_entry->h == NULL
10948 || stub_entry->h->elf.dynindx == -1)
10950 if (stub_entry->symtype == STT_GNU_IFUNC)
10951 plt = htab->elf.iplt;
10953 plt = htab->pltlocal;
10955 targ += plt->output_offset + plt->output_section->vma;
10958 if (htab->params->plt_stub_align != 0)
10960 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10962 stub_entry->group->stub_sec->size += pad;
10963 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10967 if (info->emitrelocations)
10969 stub_entry->group->stub_sec->reloc_count
10970 += num_relocs_for_offset (off - 8);
10971 stub_entry->group->stub_sec->flags |= SEC_RELOC;
10974 size = plt_stub_size (htab, stub_entry, off);
10976 /* After the bcl, lr has been modified so we need to emit
10977 .eh_frame info saying the return address is in r12. */
10978 lr_used = stub_entry->stub_offset + 8;
10979 if (stub_entry->stub_type == ppc_stub_plt_call_both)
10981 /* The eh_frame info will consist of a DW_CFA_advance_loc or
10982 variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2,
10983 DW_CFA_restore_extended 65. */
10984 delta = lr_used - stub_entry->group->lr_restore;
10985 stub_entry->group->eh_size += eh_advance_size (delta) + 6;
10986 stub_entry->group->lr_restore = lr_used + 8;
10989 case ppc_stub_plt_call:
10990 case ppc_stub_plt_call_r2save:
10991 targ = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10992 if (targ >= (bfd_vma) -2)
10994 plt = htab->elf.splt;
10995 if (!htab->elf.dynamic_sections_created
10996 || stub_entry->h == NULL
10997 || stub_entry->h->elf.dynindx == -1)
10999 if (stub_entry->symtype == STT_GNU_IFUNC)
11000 plt = htab->elf.iplt;
11002 plt = htab->pltlocal;
11004 targ += plt->output_offset + plt->output_section->vma;
11006 off = (elf_gp (info->output_bfd)
11007 + htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11010 if (htab->params->plt_stub_align != 0)
11012 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11014 stub_entry->group->stub_sec->size += pad;
11015 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11018 if (info->emitrelocations)
11020 stub_entry->group->stub_sec->reloc_count
11021 += ((PPC_HA (off) != 0)
11023 ? 2 + (htab->params->plt_static_chain
11024 && PPC_HA (off + 16) == PPC_HA (off))
11026 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11029 size = plt_stub_size (htab, stub_entry, off);
11031 if (stub_entry->h != NULL
11032 && (stub_entry->h == htab->tls_get_addr_fd
11033 || stub_entry->h == htab->tls_get_addr)
11034 && htab->params->tls_get_addr_opt
11035 && stub_entry->stub_type == ppc_stub_plt_call_r2save)
11037 /* After the bctrl, lr has been modified so we need to
11038 emit .eh_frame info saying the return address is
11039 on the stack. In fact we put the EH info specifying
11040 that the return address is on the stack *at* the
11041 call rather than after it, because the EH info for a
11042 call needs to be specified by that point.
11043 See libgcc/unwind-dw2.c execute_cfa_program. */
11044 lr_used = stub_entry->stub_offset + size - 20;
11045 /* The eh_frame info will consist of a DW_CFA_advance_loc
11046 or variant, DW_CFA_offset_externed_sf, 65, -stackoff,
11047 DW_CFA_advance_loc+4, DW_CFA_restore_extended, 65. */
11048 delta = lr_used - stub_entry->group->lr_restore;
11049 stub_entry->group->eh_size += eh_advance_size (delta) + 6;
11050 stub_entry->group->lr_restore = size - 4;
11059 stub_entry->group->stub_sec->size += size;
11063 /* Set up various things so that we can make a list of input sections
11064 for each output section included in the link. Returns -1 on error,
11065 0 when no stubs will be needed, and 1 on success. */
11068 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11072 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11077 htab->sec_info_arr_size = _bfd_section_id;
11078 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11079 htab->sec_info = bfd_zmalloc (amt);
11080 if (htab->sec_info == NULL)
11083 /* Set toc_off for com, und, abs and ind sections. */
11084 for (id = 0; id < 3; id++)
11085 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11090 /* Set up for first pass at multitoc partitioning. */
11093 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11095 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11097 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11098 htab->toc_bfd = NULL;
11099 htab->toc_first_sec = NULL;
11102 /* The linker repeatedly calls this function for each TOC input section
11103 and linker generated GOT section. Group input bfds such that the toc
11104 within a group is less than 64k in size. */
11107 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11109 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11110 bfd_vma addr, off, limit;
11115 if (!htab->second_toc_pass)
11117 /* Keep track of the first .toc or .got section for this input bfd. */
11118 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11122 htab->toc_bfd = isec->owner;
11123 htab->toc_first_sec = isec;
11126 addr = isec->output_offset + isec->output_section->vma;
11127 off = addr - htab->toc_curr;
11128 limit = 0x80008000;
11129 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11131 if (off + isec->size > limit)
11133 addr = (htab->toc_first_sec->output_offset
11134 + htab->toc_first_sec->output_section->vma);
11135 htab->toc_curr = addr;
11136 htab->toc_curr &= -TOC_BASE_ALIGN;
11139 /* toc_curr is the base address of this toc group. Set elf_gp
11140 for the input section to be the offset relative to the
11141 output toc base plus 0x8000. Making the input elf_gp an
11142 offset allows us to move the toc as a whole without
11143 recalculating input elf_gp. */
11144 off = htab->toc_curr - elf_gp (info->output_bfd);
11145 off += TOC_BASE_OFF;
11147 /* Die if someone uses a linker script that doesn't keep input
11148 file .toc and .got together. */
11150 && elf_gp (isec->owner) != 0
11151 && elf_gp (isec->owner) != off)
11154 elf_gp (isec->owner) = off;
11158 /* During the second pass toc_first_sec points to the start of
11159 a toc group, and toc_curr is used to track the old elf_gp.
11160 We use toc_bfd to ensure we only look at each bfd once. */
11161 if (htab->toc_bfd == isec->owner)
11163 htab->toc_bfd = isec->owner;
11165 if (htab->toc_first_sec == NULL
11166 || htab->toc_curr != elf_gp (isec->owner))
11168 htab->toc_curr = elf_gp (isec->owner);
11169 htab->toc_first_sec = isec;
11171 addr = (htab->toc_first_sec->output_offset
11172 + htab->toc_first_sec->output_section->vma);
11173 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11174 elf_gp (isec->owner) = off;
11179 /* Called via elf_link_hash_traverse to merge GOT entries for global
11183 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11185 if (h->root.type == bfd_link_hash_indirect)
11188 merge_got_entries (&h->got.glist);
11193 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11197 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11199 struct got_entry *gent;
11201 if (h->root.type == bfd_link_hash_indirect)
11204 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11205 if (!gent->is_indirect)
11206 allocate_got (h, (struct bfd_link_info *) inf, gent);
11210 /* Called on the first multitoc pass after the last call to
11211 ppc64_elf_next_toc_section. This function removes duplicate GOT
11215 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11217 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11218 struct bfd *ibfd, *ibfd2;
11219 bfd_boolean done_something;
11221 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11223 if (!htab->do_multi_toc)
11226 /* Merge global sym got entries within a toc group. */
11227 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11229 /* And tlsld_got. */
11230 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11232 struct got_entry *ent, *ent2;
11234 if (!is_ppc64_elf (ibfd))
11237 ent = ppc64_tlsld_got (ibfd);
11238 if (!ent->is_indirect
11239 && ent->got.offset != (bfd_vma) -1)
11241 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11243 if (!is_ppc64_elf (ibfd2))
11246 ent2 = ppc64_tlsld_got (ibfd2);
11247 if (!ent2->is_indirect
11248 && ent2->got.offset != (bfd_vma) -1
11249 && elf_gp (ibfd2) == elf_gp (ibfd))
11251 ent2->is_indirect = TRUE;
11252 ent2->got.ent = ent;
11258 /* Zap sizes of got sections. */
11259 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11260 htab->elf.irelplt->size -= htab->got_reli_size;
11261 htab->got_reli_size = 0;
11263 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11265 asection *got, *relgot;
11267 if (!is_ppc64_elf (ibfd))
11270 got = ppc64_elf_tdata (ibfd)->got;
11273 got->rawsize = got->size;
11275 relgot = ppc64_elf_tdata (ibfd)->relgot;
11276 relgot->rawsize = relgot->size;
11281 /* Now reallocate the got, local syms first. We don't need to
11282 allocate section contents again since we never increase size. */
11283 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11285 struct got_entry **lgot_ents;
11286 struct got_entry **end_lgot_ents;
11287 struct plt_entry **local_plt;
11288 struct plt_entry **end_local_plt;
11289 unsigned char *lgot_masks;
11290 bfd_size_type locsymcount;
11291 Elf_Internal_Shdr *symtab_hdr;
11294 if (!is_ppc64_elf (ibfd))
11297 lgot_ents = elf_local_got_ents (ibfd);
11301 symtab_hdr = &elf_symtab_hdr (ibfd);
11302 locsymcount = symtab_hdr->sh_info;
11303 end_lgot_ents = lgot_ents + locsymcount;
11304 local_plt = (struct plt_entry **) end_lgot_ents;
11305 end_local_plt = local_plt + locsymcount;
11306 lgot_masks = (unsigned char *) end_local_plt;
11307 s = ppc64_elf_tdata (ibfd)->got;
11308 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11310 struct got_entry *ent;
11312 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11314 unsigned int ent_size = 8;
11315 unsigned int rel_size = sizeof (Elf64_External_Rela);
11317 ent->got.offset = s->size;
11318 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11323 s->size += ent_size;
11324 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
11326 htab->elf.irelplt->size += rel_size;
11327 htab->got_reli_size += rel_size;
11329 else if (bfd_link_pic (info)
11330 && !((ent->tls_type & TLS_TPREL) != 0
11331 && bfd_link_executable (info)))
11333 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11334 srel->size += rel_size;
11340 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11342 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11344 struct got_entry *ent;
11346 if (!is_ppc64_elf (ibfd))
11349 ent = ppc64_tlsld_got (ibfd);
11350 if (!ent->is_indirect
11351 && ent->got.offset != (bfd_vma) -1)
11353 asection *s = ppc64_elf_tdata (ibfd)->got;
11354 ent->got.offset = s->size;
11356 if (bfd_link_pic (info))
11358 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11359 srel->size += sizeof (Elf64_External_Rela);
11364 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11365 if (!done_something)
11366 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11370 if (!is_ppc64_elf (ibfd))
11373 got = ppc64_elf_tdata (ibfd)->got;
11376 done_something = got->rawsize != got->size;
11377 if (done_something)
11382 if (done_something)
11383 (*htab->params->layout_sections_again) ();
11385 /* Set up for second pass over toc sections to recalculate elf_gp
11386 on input sections. */
11387 htab->toc_bfd = NULL;
11388 htab->toc_first_sec = NULL;
11389 htab->second_toc_pass = TRUE;
11390 return done_something;
11393 /* Called after second pass of multitoc partitioning. */
11396 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11398 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11400 /* After the second pass, toc_curr tracks the TOC offset used
11401 for code sections below in ppc64_elf_next_input_section. */
11402 htab->toc_curr = TOC_BASE_OFF;
11405 /* No toc references were found in ISEC. If the code in ISEC makes no
11406 calls, then there's no need to use toc adjusting stubs when branching
11407 into ISEC. Actually, indirect calls from ISEC are OK as they will
11408 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11409 needed, and 2 if a cyclical call-graph was found but no other reason
11410 for a stub was detected. If called from the top level, a return of
11411 2 means the same as a return of 0. */
11414 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11418 /* Mark this section as checked. */
11419 isec->call_check_done = 1;
11421 /* We know none of our code bearing sections will need toc stubs. */
11422 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11425 if (isec->size == 0)
11428 if (isec->output_section == NULL)
11432 if (isec->reloc_count != 0)
11434 Elf_Internal_Rela *relstart, *rel;
11435 Elf_Internal_Sym *local_syms;
11436 struct ppc_link_hash_table *htab;
11438 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11439 info->keep_memory);
11440 if (relstart == NULL)
11443 /* Look for branches to outside of this section. */
11445 htab = ppc_hash_table (info);
11449 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11451 enum elf_ppc64_reloc_type r_type;
11452 unsigned long r_symndx;
11453 struct elf_link_hash_entry *h;
11454 struct ppc_link_hash_entry *eh;
11455 Elf_Internal_Sym *sym;
11457 struct _opd_sec_data *opd;
11461 r_type = ELF64_R_TYPE (rel->r_info);
11462 if (r_type != R_PPC64_REL24
11463 && r_type != R_PPC64_REL24_NOTOC
11464 && r_type != R_PPC64_REL14
11465 && r_type != R_PPC64_REL14_BRTAKEN
11466 && r_type != R_PPC64_REL14_BRNTAKEN
11467 && r_type != R_PPC64_PLTCALL)
11470 r_symndx = ELF64_R_SYM (rel->r_info);
11471 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11478 /* Calls to dynamic lib functions go through a plt call stub
11480 eh = (struct ppc_link_hash_entry *) h;
11482 && (eh->elf.plt.plist != NULL
11484 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11490 if (sym_sec == NULL)
11491 /* Ignore other undefined symbols. */
11494 /* Assume branches to other sections not included in the
11495 link need stubs too, to cover -R and absolute syms. */
11496 if (sym_sec->output_section == NULL)
11503 sym_value = sym->st_value;
11506 if (h->root.type != bfd_link_hash_defined
11507 && h->root.type != bfd_link_hash_defweak)
11509 sym_value = h->root.u.def.value;
11511 sym_value += rel->r_addend;
11513 /* If this branch reloc uses an opd sym, find the code section. */
11514 opd = get_opd_info (sym_sec);
11517 if (h == NULL && opd->adjust != NULL)
11521 adjust = opd->adjust[OPD_NDX (sym_value)];
11523 /* Assume deleted functions won't ever be called. */
11525 sym_value += adjust;
11528 dest = opd_entry_value (sym_sec, sym_value,
11529 &sym_sec, NULL, FALSE);
11530 if (dest == (bfd_vma) -1)
11535 + sym_sec->output_offset
11536 + sym_sec->output_section->vma);
11538 /* Ignore branch to self. */
11539 if (sym_sec == isec)
11542 /* If the called function uses the toc, we need a stub. */
11543 if (sym_sec->has_toc_reloc
11544 || sym_sec->makes_toc_func_call)
11550 /* Assume any branch that needs a long branch stub might in fact
11551 need a plt_branch stub. A plt_branch stub uses r2. */
11552 else if (dest - (isec->output_offset
11553 + isec->output_section->vma
11554 + rel->r_offset) + (1 << 25)
11555 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11563 /* If calling back to a section in the process of being
11564 tested, we can't say for sure that no toc adjusting stubs
11565 are needed, so don't return zero. */
11566 else if (sym_sec->call_check_in_progress)
11569 /* Branches to another section that itself doesn't have any TOC
11570 references are OK. Recursively call ourselves to check. */
11571 else if (!sym_sec->call_check_done)
11575 /* Mark current section as indeterminate, so that other
11576 sections that call back to current won't be marked as
11578 isec->call_check_in_progress = 1;
11579 recur = toc_adjusting_stub_needed (info, sym_sec);
11580 isec->call_check_in_progress = 0;
11591 if (local_syms != NULL
11592 && (elf_symtab_hdr (isec->owner).contents
11593 != (unsigned char *) local_syms))
11595 if (elf_section_data (isec)->relocs != relstart)
11600 && isec->map_head.s != NULL
11601 && (strcmp (isec->output_section->name, ".init") == 0
11602 || strcmp (isec->output_section->name, ".fini") == 0))
11604 if (isec->map_head.s->has_toc_reloc
11605 || isec->map_head.s->makes_toc_func_call)
11607 else if (!isec->map_head.s->call_check_done)
11610 isec->call_check_in_progress = 1;
11611 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11612 isec->call_check_in_progress = 0;
11619 isec->makes_toc_func_call = 1;
11624 /* The linker repeatedly calls this function for each input section,
11625 in the order that input sections are linked into output sections.
11626 Build lists of input sections to determine groupings between which
11627 we may insert linker stubs. */
11630 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11632 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11637 if ((isec->output_section->flags & SEC_CODE) != 0
11638 && isec->output_section->id < htab->sec_info_arr_size)
11640 /* This happens to make the list in reverse order,
11641 which is what we want. */
11642 htab->sec_info[isec->id].u.list
11643 = htab->sec_info[isec->output_section->id].u.list;
11644 htab->sec_info[isec->output_section->id].u.list = isec;
11647 if (htab->multi_toc_needed)
11649 /* Analyse sections that aren't already flagged as needing a
11650 valid toc pointer. Exclude .fixup for the linux kernel.
11651 .fixup contains branches, but only back to the function that
11652 hit an exception. */
11653 if (!(isec->has_toc_reloc
11654 || (isec->flags & SEC_CODE) == 0
11655 || strcmp (isec->name, ".fixup") == 0
11656 || isec->call_check_done))
11658 if (toc_adjusting_stub_needed (info, isec) < 0)
11661 /* Make all sections use the TOC assigned for this object file.
11662 This will be wrong for pasted sections; We fix that in
11663 check_pasted_section(). */
11664 if (elf_gp (isec->owner) != 0)
11665 htab->toc_curr = elf_gp (isec->owner);
11668 htab->sec_info[isec->id].toc_off = htab->toc_curr;
11672 /* Check that all .init and .fini sections use the same toc, if they
11673 have toc relocs. */
11676 check_pasted_section (struct bfd_link_info *info, const char *name)
11678 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11682 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11683 bfd_vma toc_off = 0;
11686 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11687 if (i->has_toc_reloc)
11690 toc_off = htab->sec_info[i->id].toc_off;
11691 else if (toc_off != htab->sec_info[i->id].toc_off)
11696 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11697 if (i->makes_toc_func_call)
11699 toc_off = htab->sec_info[i->id].toc_off;
11703 /* Make sure the whole pasted function uses the same toc offset. */
11705 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11706 htab->sec_info[i->id].toc_off = toc_off;
11712 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11714 return (check_pasted_section (info, ".init")
11715 & check_pasted_section (info, ".fini"));
11718 /* See whether we can group stub sections together. Grouping stub
11719 sections may result in fewer stubs. More importantly, we need to
11720 put all .init* and .fini* stubs at the beginning of the .init or
11721 .fini output sections respectively, because glibc splits the
11722 _init and _fini functions into multiple parts. Putting a stub in
11723 the middle of a function is not a good idea. */
11726 group_sections (struct bfd_link_info *info,
11727 bfd_size_type stub_group_size,
11728 bfd_boolean stubs_always_before_branch)
11730 struct ppc_link_hash_table *htab;
11732 bfd_boolean suppress_size_errors;
11734 htab = ppc_hash_table (info);
11738 suppress_size_errors = FALSE;
11739 if (stub_group_size == 1)
11741 /* Default values. */
11742 if (stubs_always_before_branch)
11743 stub_group_size = 0x1e00000;
11745 stub_group_size = 0x1c00000;
11746 suppress_size_errors = TRUE;
11749 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
11753 if (osec->id >= htab->sec_info_arr_size)
11756 tail = htab->sec_info[osec->id].u.list;
11757 while (tail != NULL)
11761 bfd_size_type total;
11762 bfd_boolean big_sec;
11764 struct map_stub *group;
11765 bfd_size_type group_size;
11768 total = tail->size;
11769 group_size = (ppc64_elf_section_data (tail) != NULL
11770 && ppc64_elf_section_data (tail)->has_14bit_branch
11771 ? stub_group_size >> 10 : stub_group_size);
11773 big_sec = total > group_size;
11774 if (big_sec && !suppress_size_errors)
11775 /* xgettext:c-format */
11776 _bfd_error_handler (_("%pB section %pA exceeds stub group size"),
11777 tail->owner, tail);
11778 curr_toc = htab->sec_info[tail->id].toc_off;
11780 while ((prev = htab->sec_info[curr->id].u.list) != NULL
11781 && ((total += curr->output_offset - prev->output_offset)
11782 < (ppc64_elf_section_data (prev) != NULL
11783 && ppc64_elf_section_data (prev)->has_14bit_branch
11784 ? (group_size = stub_group_size >> 10) : group_size))
11785 && htab->sec_info[prev->id].toc_off == curr_toc)
11788 /* OK, the size from the start of CURR to the end is less
11789 than group_size and thus can be handled by one stub
11790 section. (or the tail section is itself larger than
11791 group_size, in which case we may be toast.) We should
11792 really be keeping track of the total size of stubs added
11793 here, as stubs contribute to the final output section
11794 size. That's a little tricky, and this way will only
11795 break if stubs added make the total size more than 2^25,
11796 ie. for the default stub_group_size, if stubs total more
11797 than 2097152 bytes, or nearly 75000 plt call stubs. */
11798 group = bfd_alloc (curr->owner, sizeof (*group));
11801 group->link_sec = curr;
11802 group->stub_sec = NULL;
11803 group->needs_save_res = 0;
11804 group->lr_restore = 0;
11805 group->eh_size = 0;
11806 group->eh_base = 0;
11807 group->next = htab->group;
11808 htab->group = group;
11811 prev = htab->sec_info[tail->id].u.list;
11812 /* Set up this stub group. */
11813 htab->sec_info[tail->id].u.group = group;
11815 while (tail != curr && (tail = prev) != NULL);
11817 /* But wait, there's more! Input sections up to group_size
11818 bytes before the stub section can be handled by it too.
11819 Don't do this if we have a really large section after the
11820 stubs, as adding more stubs increases the chance that
11821 branches may not reach into the stub section. */
11822 if (!stubs_always_before_branch && !big_sec)
11825 while (prev != NULL
11826 && ((total += tail->output_offset - prev->output_offset)
11827 < (ppc64_elf_section_data (prev) != NULL
11828 && ppc64_elf_section_data (prev)->has_14bit_branch
11829 ? (group_size = stub_group_size >> 10)
11831 && htab->sec_info[prev->id].toc_off == curr_toc)
11834 prev = htab->sec_info[tail->id].u.list;
11835 htab->sec_info[tail->id].u.group = group;
11844 static const unsigned char glink_eh_frame_cie[] =
11846 0, 0, 0, 16, /* length. */
11847 0, 0, 0, 0, /* id. */
11848 1, /* CIE version. */
11849 'z', 'R', 0, /* Augmentation string. */
11850 4, /* Code alignment. */
11851 0x78, /* Data alignment. */
11853 1, /* Augmentation size. */
11854 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11855 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11858 /* Stripping output sections is normally done before dynamic section
11859 symbols have been allocated. This function is called later, and
11860 handles cases like htab->brlt which is mapped to its own output
11864 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11866 if (isec->size == 0
11867 && isec->output_section->size == 0
11868 && !(isec->output_section->flags & SEC_KEEP)
11869 && !bfd_section_removed_from_list (info->output_bfd,
11870 isec->output_section)
11871 && elf_section_data (isec->output_section)->dynindx == 0)
11873 isec->output_section->flags |= SEC_EXCLUDE;
11874 bfd_section_list_remove (info->output_bfd, isec->output_section);
11875 info->output_bfd->section_count--;
11879 /* Determine and set the size of the stub section for a final link.
11881 The basic idea here is to examine all the relocations looking for
11882 PC-relative calls to a target that is unreachable with a "bl"
11886 ppc64_elf_size_stubs (struct bfd_link_info *info)
11888 bfd_size_type stub_group_size;
11889 bfd_boolean stubs_always_before_branch;
11890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11895 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
11896 htab->params->plt_thread_safe = 1;
11897 if (!htab->opd_abi)
11898 htab->params->plt_thread_safe = 0;
11899 else if (htab->params->plt_thread_safe == -1)
11901 static const char *const thread_starter[] =
11905 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11907 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11908 "mq_notify", "create_timer",
11913 "GOMP_parallel_start",
11914 "GOMP_parallel_loop_static",
11915 "GOMP_parallel_loop_static_start",
11916 "GOMP_parallel_loop_dynamic",
11917 "GOMP_parallel_loop_dynamic_start",
11918 "GOMP_parallel_loop_guided",
11919 "GOMP_parallel_loop_guided_start",
11920 "GOMP_parallel_loop_runtime",
11921 "GOMP_parallel_loop_runtime_start",
11922 "GOMP_parallel_sections",
11923 "GOMP_parallel_sections_start",
11929 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
11931 struct elf_link_hash_entry *h;
11932 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11933 FALSE, FALSE, TRUE);
11934 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
11935 if (htab->params->plt_thread_safe)
11939 stubs_always_before_branch = htab->params->group_size < 0;
11940 if (htab->params->group_size < 0)
11941 stub_group_size = -htab->params->group_size;
11943 stub_group_size = htab->params->group_size;
11945 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
11948 #define STUB_SHRINK_ITER 20
11949 /* Loop until no stubs added. After iteration 20 of this loop we may
11950 exit on a stub section shrinking. This is to break out of a
11951 pathological case where adding stubs on one iteration decreases
11952 section gaps (perhaps due to alignment), which then requires
11953 fewer or smaller stubs on the next iteration. */
11958 unsigned int bfd_indx;
11959 struct map_stub *group;
11961 htab->stub_iteration += 1;
11963 for (input_bfd = info->input_bfds, bfd_indx = 0;
11965 input_bfd = input_bfd->link.next, bfd_indx++)
11967 Elf_Internal_Shdr *symtab_hdr;
11969 Elf_Internal_Sym *local_syms = NULL;
11971 if (!is_ppc64_elf (input_bfd))
11974 /* We'll need the symbol table in a second. */
11975 symtab_hdr = &elf_symtab_hdr (input_bfd);
11976 if (symtab_hdr->sh_info == 0)
11979 /* Walk over each section attached to the input bfd. */
11980 for (section = input_bfd->sections;
11982 section = section->next)
11984 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11986 /* If there aren't any relocs, then there's nothing more
11988 if ((section->flags & SEC_RELOC) == 0
11989 || (section->flags & SEC_ALLOC) == 0
11990 || (section->flags & SEC_LOAD) == 0
11991 || (section->flags & SEC_CODE) == 0
11992 || section->reloc_count == 0)
11995 /* If this section is a link-once section that will be
11996 discarded, then don't create any stubs. */
11997 if (section->output_section == NULL
11998 || section->output_section->owner != info->output_bfd)
12001 /* Get the relocs. */
12003 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12004 info->keep_memory);
12005 if (internal_relocs == NULL)
12006 goto error_ret_free_local;
12008 /* Now examine each relocation. */
12009 irela = internal_relocs;
12010 irelaend = irela + section->reloc_count;
12011 for (; irela < irelaend; irela++)
12013 enum elf_ppc64_reloc_type r_type;
12014 unsigned int r_indx;
12015 enum ppc_stub_type stub_type;
12016 struct ppc_stub_hash_entry *stub_entry;
12017 asection *sym_sec, *code_sec;
12018 bfd_vma sym_value, code_value;
12019 bfd_vma destination;
12020 unsigned long local_off;
12021 bfd_boolean ok_dest;
12022 struct ppc_link_hash_entry *hash;
12023 struct ppc_link_hash_entry *fdh;
12024 struct elf_link_hash_entry *h;
12025 Elf_Internal_Sym *sym;
12027 const asection *id_sec;
12028 struct _opd_sec_data *opd;
12029 struct plt_entry *plt_ent;
12031 r_type = ELF64_R_TYPE (irela->r_info);
12032 r_indx = ELF64_R_SYM (irela->r_info);
12034 if (r_type >= R_PPC64_max)
12036 bfd_set_error (bfd_error_bad_value);
12037 goto error_ret_free_internal;
12040 /* Only look for stubs on branch instructions. */
12041 if (r_type != R_PPC64_REL24
12042 && r_type != R_PPC64_REL24_NOTOC
12043 && r_type != R_PPC64_REL14
12044 && r_type != R_PPC64_REL14_BRTAKEN
12045 && r_type != R_PPC64_REL14_BRNTAKEN)
12048 /* Now determine the call target, its name, value,
12050 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12051 r_indx, input_bfd))
12052 goto error_ret_free_internal;
12053 hash = (struct ppc_link_hash_entry *) h;
12060 sym_value = sym->st_value;
12061 if (sym_sec != NULL
12062 && sym_sec->output_section != NULL)
12065 else if (hash->elf.root.type == bfd_link_hash_defined
12066 || hash->elf.root.type == bfd_link_hash_defweak)
12068 sym_value = hash->elf.root.u.def.value;
12069 if (sym_sec->output_section != NULL)
12072 else if (hash->elf.root.type == bfd_link_hash_undefweak
12073 || hash->elf.root.type == bfd_link_hash_undefined)
12075 /* Recognise an old ABI func code entry sym, and
12076 use the func descriptor sym instead if it is
12078 if (hash->elf.root.root.string[0] == '.'
12079 && hash->oh != NULL)
12081 fdh = ppc_follow_link (hash->oh);
12082 if (fdh->elf.root.type == bfd_link_hash_defined
12083 || fdh->elf.root.type == bfd_link_hash_defweak)
12085 sym_sec = fdh->elf.root.u.def.section;
12086 sym_value = fdh->elf.root.u.def.value;
12087 if (sym_sec->output_section != NULL)
12096 bfd_set_error (bfd_error_bad_value);
12097 goto error_ret_free_internal;
12104 sym_value += irela->r_addend;
12105 destination = (sym_value
12106 + sym_sec->output_offset
12107 + sym_sec->output_section->vma);
12108 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12113 code_sec = sym_sec;
12114 code_value = sym_value;
12115 opd = get_opd_info (sym_sec);
12120 if (hash == NULL && opd->adjust != NULL)
12122 long adjust = opd->adjust[OPD_NDX (sym_value)];
12125 code_value += adjust;
12126 sym_value += adjust;
12128 dest = opd_entry_value (sym_sec, sym_value,
12129 &code_sec, &code_value, FALSE);
12130 if (dest != (bfd_vma) -1)
12132 destination = dest;
12135 /* Fixup old ABI sym to point at code
12137 hash->elf.root.type = bfd_link_hash_defweak;
12138 hash->elf.root.u.def.section = code_sec;
12139 hash->elf.root.u.def.value = code_value;
12144 /* Determine what (if any) linker stub is needed. */
12146 stub_type = ppc_type_of_stub (section, irela, &hash,
12147 &plt_ent, destination,
12150 if (r_type == R_PPC64_REL24_NOTOC)
12152 if (stub_type == ppc_stub_plt_call)
12153 stub_type = ppc_stub_plt_call_notoc;
12154 else if (stub_type == ppc_stub_long_branch
12155 || (code_sec != NULL
12156 && code_sec->output_section != NULL
12157 && (((hash ? hash->elf.other : sym->st_other)
12158 & STO_PPC64_LOCAL_MASK)
12159 != 1 << STO_PPC64_LOCAL_BIT)))
12160 stub_type = ppc_stub_long_branch_notoc;
12162 else if (stub_type != ppc_stub_plt_call)
12164 /* Check whether we need a TOC adjusting stub.
12165 Since the linker pastes together pieces from
12166 different object files when creating the
12167 _init and _fini functions, it may be that a
12168 call to what looks like a local sym is in
12169 fact a call needing a TOC adjustment. */
12170 if ((code_sec != NULL
12171 && code_sec->output_section != NULL
12172 && (htab->sec_info[code_sec->id].toc_off
12173 != htab->sec_info[section->id].toc_off)
12174 && (code_sec->has_toc_reloc
12175 || code_sec->makes_toc_func_call))
12176 || (((hash ? hash->elf.other : sym->st_other)
12177 & STO_PPC64_LOCAL_MASK)
12178 == 1 << STO_PPC64_LOCAL_BIT))
12179 stub_type = ppc_stub_long_branch_r2off;
12182 if (stub_type == ppc_stub_none)
12185 /* __tls_get_addr calls might be eliminated. */
12186 if (stub_type != ppc_stub_plt_call
12187 && stub_type != ppc_stub_plt_call_notoc
12189 && (hash == htab->tls_get_addr
12190 || hash == htab->tls_get_addr_fd)
12191 && section->has_tls_reloc
12192 && irela != internal_relocs)
12194 /* Get tls info. */
12195 unsigned char *tls_mask;
12197 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12198 irela - 1, input_bfd))
12199 goto error_ret_free_internal;
12200 if ((*tls_mask & TLS_TLS) != 0)
12204 if (stub_type == ppc_stub_plt_call)
12207 && htab->params->plt_localentry0 != 0
12208 && is_elfv2_localentry0 (&hash->elf))
12209 htab->has_plt_localentry0 = 1;
12210 else if (irela + 1 < irelaend
12211 && irela[1].r_offset == irela->r_offset + 4
12212 && (ELF64_R_TYPE (irela[1].r_info)
12213 == R_PPC64_TOCSAVE))
12215 if (!tocsave_find (htab, INSERT,
12216 &local_syms, irela + 1, input_bfd))
12217 goto error_ret_free_internal;
12220 stub_type = ppc_stub_plt_call_r2save;
12223 /* Support for grouping stub sections. */
12224 id_sec = htab->sec_info[section->id].u.group->link_sec;
12226 /* Get the name of this stub. */
12227 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12229 goto error_ret_free_internal;
12231 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12232 stub_name, FALSE, FALSE);
12233 if (stub_entry != NULL)
12235 enum ppc_stub_type old_type;
12236 /* A stub has already been created, but it may
12237 not be the required type. We shouldn't be
12238 transitioning from plt_call to long_branch
12239 stubs or vice versa, but we might be
12240 upgrading from plt_call to plt_call_r2save or
12241 from long_branch to long_branch_r2off. */
12243 old_type = stub_entry->stub_type;
12249 case ppc_stub_save_res:
12252 case ppc_stub_plt_call:
12253 case ppc_stub_plt_call_r2save:
12254 case ppc_stub_plt_call_notoc:
12255 case ppc_stub_plt_call_both:
12256 if (stub_type == ppc_stub_plt_call)
12258 else if (stub_type == ppc_stub_plt_call_r2save)
12260 if (old_type == ppc_stub_plt_call_notoc)
12261 stub_type = ppc_stub_plt_call_both;
12263 else if (stub_type == ppc_stub_plt_call_notoc)
12265 if (old_type == ppc_stub_plt_call_r2save)
12266 stub_type = ppc_stub_plt_call_both;
12272 case ppc_stub_plt_branch:
12273 case ppc_stub_plt_branch_r2off:
12274 case ppc_stub_plt_branch_notoc:
12275 case ppc_stub_plt_branch_both:
12276 old_type += (ppc_stub_long_branch
12277 - ppc_stub_plt_branch);
12278 /* Fall through. */
12279 case ppc_stub_long_branch:
12280 case ppc_stub_long_branch_r2off:
12281 case ppc_stub_long_branch_notoc:
12282 case ppc_stub_long_branch_both:
12283 if (stub_type == ppc_stub_long_branch)
12285 else if (stub_type == ppc_stub_long_branch_r2off)
12287 if (old_type == ppc_stub_long_branch_notoc)
12288 stub_type = ppc_stub_long_branch_both;
12290 else if (stub_type == ppc_stub_long_branch_notoc)
12292 if (old_type == ppc_stub_long_branch_r2off)
12293 stub_type = ppc_stub_long_branch_both;
12299 if (old_type < stub_type)
12300 stub_entry->stub_type = stub_type;
12304 stub_entry = ppc_add_stub (stub_name, section, info);
12305 if (stub_entry == NULL)
12308 error_ret_free_internal:
12309 if (elf_section_data (section)->relocs == NULL)
12310 free (internal_relocs);
12311 error_ret_free_local:
12312 if (local_syms != NULL
12313 && (symtab_hdr->contents
12314 != (unsigned char *) local_syms))
12319 stub_entry->stub_type = stub_type;
12320 if (stub_type >= ppc_stub_plt_call
12321 && stub_type <= ppc_stub_plt_call_both)
12323 stub_entry->target_value = sym_value;
12324 stub_entry->target_section = sym_sec;
12328 stub_entry->target_value = code_value;
12329 stub_entry->target_section = code_sec;
12331 stub_entry->h = hash;
12332 stub_entry->plt_ent = plt_ent;
12333 stub_entry->symtype
12334 = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info);
12335 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12338 && (hash->elf.root.type == bfd_link_hash_defined
12339 || hash->elf.root.type == bfd_link_hash_defweak))
12340 htab->stub_globals += 1;
12343 /* We're done with the internal relocs, free them. */
12344 if (elf_section_data (section)->relocs != internal_relocs)
12345 free (internal_relocs);
12348 if (local_syms != NULL
12349 && symtab_hdr->contents != (unsigned char *) local_syms)
12351 if (!info->keep_memory)
12354 symtab_hdr->contents = (unsigned char *) local_syms;
12358 /* We may have added some stubs. Find out the new size of the
12360 for (group = htab->group; group != NULL; group = group->next)
12362 group->lr_restore = 0;
12363 group->eh_size = 0;
12364 if (group->stub_sec != NULL)
12366 asection *stub_sec = group->stub_sec;
12368 if (htab->stub_iteration <= STUB_SHRINK_ITER
12369 || stub_sec->rawsize < stub_sec->size)
12370 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12371 stub_sec->rawsize = stub_sec->size;
12372 stub_sec->size = 0;
12373 stub_sec->reloc_count = 0;
12374 stub_sec->flags &= ~SEC_RELOC;
12378 if (htab->stub_iteration <= STUB_SHRINK_ITER
12379 || htab->brlt->rawsize < htab->brlt->size)
12380 htab->brlt->rawsize = htab->brlt->size;
12381 htab->brlt->size = 0;
12382 htab->brlt->reloc_count = 0;
12383 htab->brlt->flags &= ~SEC_RELOC;
12384 if (htab->relbrlt != NULL)
12385 htab->relbrlt->size = 0;
12387 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12389 for (group = htab->group; group != NULL; group = group->next)
12390 if (group->needs_save_res)
12391 group->stub_sec->size += htab->sfpr->size;
12393 if (info->emitrelocations
12394 && htab->glink != NULL && htab->glink->size != 0)
12396 htab->glink->reloc_count = 1;
12397 htab->glink->flags |= SEC_RELOC;
12400 if (htab->glink_eh_frame != NULL
12401 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12402 && htab->glink_eh_frame->output_section->size > 8)
12404 size_t size = 0, align = 4;
12406 for (group = htab->group; group != NULL; group = group->next)
12407 if (group->eh_size != 0)
12408 size += (group->eh_size + 17 + align - 1) & -align;
12409 if (htab->glink != NULL && htab->glink->size != 0)
12410 size += (24 + align - 1) & -align;
12412 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12413 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12414 size = (size + align - 1) & -align;
12415 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12416 htab->glink_eh_frame->size = size;
12419 if (htab->params->plt_stub_align != 0)
12420 for (group = htab->group; group != NULL; group = group->next)
12421 if (group->stub_sec != NULL)
12423 int align = abs (htab->params->plt_stub_align);
12424 group->stub_sec->size
12425 = (group->stub_sec->size + (1 << align) - 1) & -(1 << align);
12428 for (group = htab->group; group != NULL; group = group->next)
12429 if (group->stub_sec != NULL
12430 && group->stub_sec->rawsize != group->stub_sec->size
12431 && (htab->stub_iteration <= STUB_SHRINK_ITER
12432 || group->stub_sec->rawsize < group->stub_sec->size))
12436 && (htab->brlt->rawsize == htab->brlt->size
12437 || (htab->stub_iteration > STUB_SHRINK_ITER
12438 && htab->brlt->rawsize > htab->brlt->size))
12439 && (htab->glink_eh_frame == NULL
12440 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12443 /* Ask the linker to do its stuff. */
12444 (*htab->params->layout_sections_again) ();
12447 if (htab->glink_eh_frame != NULL
12448 && htab->glink_eh_frame->size != 0)
12451 bfd_byte *p, *last_fde;
12452 size_t last_fde_len, size, align, pad;
12453 struct map_stub *group;
12455 /* It is necessary to at least have a rough outline of the
12456 linker generated CIEs and FDEs written before
12457 bfd_elf_discard_info is run, in order for these FDEs to be
12458 indexed in .eh_frame_hdr. */
12459 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12462 htab->glink_eh_frame->contents = p;
12466 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12467 /* CIE length (rewrite in case little-endian). */
12468 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12469 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12470 p += last_fde_len + 4;
12472 for (group = htab->group; group != NULL; group = group->next)
12473 if (group->eh_size != 0)
12475 group->eh_base = p - htab->glink_eh_frame->contents;
12477 last_fde_len = ((group->eh_size + 17 + align - 1) & -align) - 4;
12479 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12482 val = p - htab->glink_eh_frame->contents;
12483 bfd_put_32 (htab->elf.dynobj, val, p);
12485 /* Offset to stub section, written later. */
12487 /* stub section size. */
12488 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12490 /* Augmentation. */
12492 /* Make sure we don't have all nops. This is enough for
12493 elf-eh-frame.c to detect the last non-nop opcode. */
12494 p[group->eh_size - 1] = DW_CFA_advance_loc + 1;
12495 p = last_fde + last_fde_len + 4;
12497 if (htab->glink != NULL && htab->glink->size != 0)
12500 last_fde_len = ((24 + align - 1) & -align) - 4;
12502 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12505 val = p - htab->glink_eh_frame->contents;
12506 bfd_put_32 (htab->elf.dynobj, val, p);
12508 /* Offset to .glink, written later. */
12511 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12513 /* Augmentation. */
12516 *p++ = DW_CFA_advance_loc + 1;
12517 *p++ = DW_CFA_register;
12519 *p++ = htab->opd_abi ? 12 : 0;
12520 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12521 *p++ = DW_CFA_restore_extended;
12523 p += ((24 + align - 1) & -align) - 24;
12525 /* Subsume any padding into the last FDE if user .eh_frame
12526 sections are aligned more than glink_eh_frame. Otherwise any
12527 zero padding will be seen as a terminator. */
12528 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12529 size = p - htab->glink_eh_frame->contents;
12530 pad = ((size + align - 1) & -align) - size;
12531 htab->glink_eh_frame->size = size + pad;
12532 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12535 maybe_strip_output (info, htab->brlt);
12536 if (htab->glink_eh_frame != NULL)
12537 maybe_strip_output (info, htab->glink_eh_frame);
12542 /* Called after we have determined section placement. If sections
12543 move, we'll be called again. Provide a value for TOCstart. */
12546 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12549 bfd_vma TOCstart, adjust;
12553 struct elf_link_hash_entry *h;
12554 struct elf_link_hash_table *htab = elf_hash_table (info);
12556 if (is_elf_hash_table (htab)
12557 && htab->hgot != NULL)
12561 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12562 if (is_elf_hash_table (htab))
12566 && h->root.type == bfd_link_hash_defined
12567 && !h->root.linker_def
12568 && (!is_elf_hash_table (htab)
12569 || h->def_regular))
12571 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12572 + h->root.u.def.section->output_offset
12573 + h->root.u.def.section->output_section->vma);
12574 _bfd_set_gp_value (obfd, TOCstart);
12579 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12580 order. The TOC starts where the first of these sections starts. */
12581 s = bfd_get_section_by_name (obfd, ".got");
12582 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12583 s = bfd_get_section_by_name (obfd, ".toc");
12584 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12585 s = bfd_get_section_by_name (obfd, ".tocbss");
12586 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12587 s = bfd_get_section_by_name (obfd, ".plt");
12588 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12590 /* This may happen for
12591 o references to TOC base (SYM@toc / TOC[tc0]) without a
12593 o bad linker script
12594 o --gc-sections and empty TOC sections
12596 FIXME: Warn user? */
12598 /* Look for a likely section. We probably won't even be
12600 for (s = obfd->sections; s != NULL; s = s->next)
12601 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12603 == (SEC_ALLOC | SEC_SMALL_DATA))
12606 for (s = obfd->sections; s != NULL; s = s->next)
12607 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12608 == (SEC_ALLOC | SEC_SMALL_DATA))
12611 for (s = obfd->sections; s != NULL; s = s->next)
12612 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12616 for (s = obfd->sections; s != NULL; s = s->next)
12617 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12623 TOCstart = s->output_section->vma + s->output_offset;
12625 /* Force alignment. */
12626 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12627 TOCstart -= adjust;
12628 _bfd_set_gp_value (obfd, TOCstart);
12630 if (info != NULL && s != NULL)
12632 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12636 if (htab->elf.hgot != NULL)
12638 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12639 htab->elf.hgot->root.u.def.section = s;
12644 struct bfd_link_hash_entry *bh = NULL;
12645 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12646 s, TOC_BASE_OFF - adjust,
12647 NULL, FALSE, FALSE, &bh);
12653 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12654 write out any global entry stubs, and PLT relocations. */
12657 build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf)
12659 struct bfd_link_info *info;
12660 struct ppc_link_hash_table *htab;
12661 struct plt_entry *ent;
12664 if (h->root.type == bfd_link_hash_indirect)
12668 htab = ppc_hash_table (info);
12672 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12673 if (ent->plt.offset != (bfd_vma) -1)
12675 /* This symbol has an entry in the procedure linkage
12676 table. Set it up. */
12677 Elf_Internal_Rela rela;
12678 asection *plt, *relplt;
12681 if (!htab->elf.dynamic_sections_created
12682 || h->dynindx == -1)
12684 if (!(h->def_regular
12685 && (h->root.type == bfd_link_hash_defined
12686 || h->root.type == bfd_link_hash_defweak)))
12688 if (h->type == STT_GNU_IFUNC)
12690 plt = htab->elf.iplt;
12691 relplt = htab->elf.irelplt;
12692 htab->local_ifunc_resolver = 1;
12694 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12696 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12700 plt = htab->pltlocal;
12701 if (bfd_link_pic (info))
12703 relplt = htab->relpltlocal;
12705 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
12707 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12712 rela.r_addend = (h->root.u.def.value
12713 + h->root.u.def.section->output_offset
12714 + h->root.u.def.section->output_section->vma
12717 if (relplt == NULL)
12719 loc = plt->contents + ent->plt.offset;
12720 bfd_put_64 (info->output_bfd, rela.r_addend, loc);
12723 bfd_vma toc = elf_gp (info->output_bfd);
12724 toc += htab->sec_info[h->root.u.def.section->id].toc_off;
12725 bfd_put_64 (info->output_bfd, toc, loc + 8);
12730 rela.r_offset = (plt->output_section->vma
12731 + plt->output_offset
12732 + ent->plt.offset);
12733 loc = relplt->contents + (relplt->reloc_count++
12734 * sizeof (Elf64_External_Rela));
12735 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
12740 rela.r_offset = (htab->elf.splt->output_section->vma
12741 + htab->elf.splt->output_offset
12742 + ent->plt.offset);
12743 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12744 rela.r_addend = ent->addend;
12745 loc = (htab->elf.srelplt->contents
12746 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
12747 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
12748 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
12749 htab->maybe_local_ifunc_resolver = 1;
12750 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
12754 if (!h->pointer_equality_needed)
12757 if (h->def_regular)
12760 s = htab->global_entry;
12761 if (s == NULL || s->size == 0)
12764 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12765 if (ent->plt.offset != (bfd_vma) -1
12766 && ent->addend == 0)
12772 p = s->contents + h->root.u.def.value;
12773 plt = htab->elf.splt;
12774 if (!htab->elf.dynamic_sections_created
12775 || h->dynindx == -1)
12777 if (h->type == STT_GNU_IFUNC)
12778 plt = htab->elf.iplt;
12780 plt = htab->pltlocal;
12782 off = ent->plt.offset + plt->output_offset + plt->output_section->vma;
12783 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12785 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12787 info->callbacks->einfo
12788 (_("%P: linkage table error against `%pT'\n"),
12789 h->root.root.string);
12790 bfd_set_error (bfd_error_bad_value);
12791 htab->stub_error = TRUE;
12794 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12795 if (htab->params->emit_stub_syms)
12797 size_t len = strlen (h->root.root.string);
12798 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12803 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12804 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12807 if (h->root.type == bfd_link_hash_new)
12809 h->root.type = bfd_link_hash_defined;
12810 h->root.u.def.section = s;
12811 h->root.u.def.value = p - s->contents;
12812 h->ref_regular = 1;
12813 h->def_regular = 1;
12814 h->ref_regular_nonweak = 1;
12815 h->forced_local = 1;
12817 h->root.linker_def = 1;
12821 if (PPC_HA (off) != 0)
12823 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12826 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12828 bfd_put_32 (s->owner, MTCTR_R12, p);
12830 bfd_put_32 (s->owner, BCTR, p);
12836 /* Write PLT relocs for locals. */
12839 write_plt_relocs_for_local_syms (struct bfd_link_info *info)
12841 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12844 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
12846 struct got_entry **lgot_ents, **end_lgot_ents;
12847 struct plt_entry **local_plt, **lplt, **end_local_plt;
12848 Elf_Internal_Shdr *symtab_hdr;
12849 bfd_size_type locsymcount;
12850 Elf_Internal_Sym *local_syms = NULL;
12851 struct plt_entry *ent;
12853 if (!is_ppc64_elf (ibfd))
12856 lgot_ents = elf_local_got_ents (ibfd);
12860 symtab_hdr = &elf_symtab_hdr (ibfd);
12861 locsymcount = symtab_hdr->sh_info;
12862 end_lgot_ents = lgot_ents + locsymcount;
12863 local_plt = (struct plt_entry **) end_lgot_ents;
12864 end_local_plt = local_plt + locsymcount;
12865 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
12866 for (ent = *lplt; ent != NULL; ent = ent->next)
12867 if (ent->plt.offset != (bfd_vma) -1)
12869 Elf_Internal_Sym *sym;
12871 asection *plt, *relplt;
12875 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
12876 lplt - local_plt, ibfd))
12878 if (local_syms != NULL
12879 && symtab_hdr->contents != (unsigned char *) local_syms)
12884 val = sym->st_value + ent->addend;
12885 val += PPC64_LOCAL_ENTRY_OFFSET (sym->st_other);
12886 if (sym_sec != NULL && sym_sec->output_section != NULL)
12887 val += sym_sec->output_offset + sym_sec->output_section->vma;
12889 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12891 htab->local_ifunc_resolver = 1;
12892 plt = htab->elf.iplt;
12893 relplt = htab->elf.irelplt;
12897 plt = htab->pltlocal;
12898 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
12901 if (relplt == NULL)
12903 loc = plt->contents + ent->plt.offset;
12904 bfd_put_64 (info->output_bfd, val, loc);
12907 bfd_vma toc = elf_gp (ibfd);
12908 bfd_put_64 (info->output_bfd, toc, loc + 8);
12913 Elf_Internal_Rela rela;
12914 rela.r_offset = (ent->plt.offset
12915 + plt->output_offset
12916 + plt->output_section->vma);
12917 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12920 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12922 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12927 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT);
12929 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12931 rela.r_addend = val;
12932 loc = relplt->contents + (relplt->reloc_count++
12933 * sizeof (Elf64_External_Rela));
12934 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc);
12938 if (local_syms != NULL
12939 && symtab_hdr->contents != (unsigned char *) local_syms)
12941 if (!info->keep_memory)
12944 symtab_hdr->contents = (unsigned char *) local_syms;
12950 /* Build all the stubs associated with the current output file.
12951 The stubs are kept in a hash table attached to the main linker
12952 hash table. This function is called via gldelf64ppc_finish. */
12955 ppc64_elf_build_stubs (struct bfd_link_info *info,
12958 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12959 struct map_stub *group;
12960 asection *stub_sec;
12962 int stub_sec_count = 0;
12967 /* Allocate memory to hold the linker stubs. */
12968 for (group = htab->group; group != NULL; group = group->next)
12970 group->eh_size = 0;
12971 group->lr_restore = 0;
12972 if ((stub_sec = group->stub_sec) != NULL
12973 && stub_sec->size != 0)
12975 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd,
12977 if (stub_sec->contents == NULL)
12979 stub_sec->size = 0;
12983 if (htab->glink != NULL && htab->glink->size != 0)
12988 /* Build the .glink plt call stub. */
12989 if (htab->params->emit_stub_syms)
12991 struct elf_link_hash_entry *h;
12992 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12993 TRUE, FALSE, FALSE);
12996 if (h->root.type == bfd_link_hash_new)
12998 h->root.type = bfd_link_hash_defined;
12999 h->root.u.def.section = htab->glink;
13000 h->root.u.def.value = 8;
13001 h->ref_regular = 1;
13002 h->def_regular = 1;
13003 h->ref_regular_nonweak = 1;
13004 h->forced_local = 1;
13006 h->root.linker_def = 1;
13009 plt0 = (htab->elf.splt->output_section->vma
13010 + htab->elf.splt->output_offset
13012 if (info->emitrelocations)
13014 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13017 r->r_offset = (htab->glink->output_offset
13018 + htab->glink->output_section->vma);
13019 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13020 r->r_addend = plt0;
13022 p = htab->glink->contents;
13023 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13024 bfd_put_64 (htab->glink->owner, plt0, p);
13028 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13030 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13032 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13034 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13036 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13038 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13040 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13042 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13044 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13046 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13051 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13053 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13055 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13057 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13059 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13061 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13063 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13065 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13067 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13069 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13071 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13073 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13075 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13078 bfd_put_32 (htab->glink->owner, BCTR, p);
13080 BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab));
13082 /* Build the .glink lazy link call stubs. */
13084 while (p < htab->glink->contents + htab->glink->size)
13090 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13095 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13097 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13102 bfd_put_32 (htab->glink->owner,
13103 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13109 /* Build .glink global entry stubs, and PLT relocs for globals. */
13110 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info);
13112 if (!write_plt_relocs_for_local_syms (info))
13115 if (htab->brlt != NULL && htab->brlt->size != 0)
13117 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13119 if (htab->brlt->contents == NULL)
13122 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13124 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13125 htab->relbrlt->size);
13126 if (htab->relbrlt->contents == NULL)
13130 /* Build the stubs as directed by the stub hash table. */
13131 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13133 for (group = htab->group; group != NULL; group = group->next)
13134 if (group->needs_save_res)
13135 group->stub_sec->size += htab->sfpr->size;
13137 if (htab->relbrlt != NULL)
13138 htab->relbrlt->reloc_count = 0;
13140 if (htab->params->plt_stub_align != 0)
13141 for (group = htab->group; group != NULL; group = group->next)
13142 if ((stub_sec = group->stub_sec) != NULL)
13144 int align = abs (htab->params->plt_stub_align);
13145 stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align);
13148 for (group = htab->group; group != NULL; group = group->next)
13149 if (group->needs_save_res)
13151 stub_sec = group->stub_sec;
13152 memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
13153 htab->sfpr->contents, htab->sfpr->size);
13154 if (htab->params->emit_stub_syms)
13158 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13159 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13164 if (htab->glink_eh_frame != NULL
13165 && htab->glink_eh_frame->size != 0)
13170 p = htab->glink_eh_frame->contents;
13171 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
13173 for (group = htab->group; group != NULL; group = group->next)
13174 if (group->eh_size != 0)
13176 /* Offset to stub section. */
13177 val = (group->stub_sec->output_section->vma
13178 + group->stub_sec->output_offset);
13179 val -= (htab->glink_eh_frame->output_section->vma
13180 + htab->glink_eh_frame->output_offset
13181 + (p + 8 - htab->glink_eh_frame->contents));
13182 if (val + 0x80000000 > 0xffffffff)
13185 (_("%s offset too large for .eh_frame sdata4 encoding"),
13186 group->stub_sec->name);
13189 bfd_put_32 (htab->elf.dynobj, val, p + 8);
13190 p += (group->eh_size + 17 + 3) & -4;
13192 if (htab->glink != NULL && htab->glink->size != 0)
13194 /* Offset to .glink. */
13195 val = (htab->glink->output_section->vma
13196 + htab->glink->output_offset
13198 val -= (htab->glink_eh_frame->output_section->vma
13199 + htab->glink_eh_frame->output_offset
13200 + (p + 8 - htab->glink_eh_frame->contents));
13201 if (val + 0x80000000 > 0xffffffff)
13204 (_("%s offset too large for .eh_frame sdata4 encoding"),
13205 htab->glink->name);
13208 bfd_put_32 (htab->elf.dynobj, val, p + 8);
13209 p += (24 + align - 1) & -align;
13213 for (group = htab->group; group != NULL; group = group->next)
13214 if ((stub_sec = group->stub_sec) != NULL)
13216 stub_sec_count += 1;
13217 if (stub_sec->rawsize != stub_sec->size
13218 && (htab->stub_iteration <= STUB_SHRINK_ITER
13219 || stub_sec->rawsize < stub_sec->size))
13225 htab->stub_error = TRUE;
13226 _bfd_error_handler (_("stubs don't match calculated size"));
13229 if (htab->stub_error)
13235 *stats = bfd_malloc (500);
13236 if (*stats == NULL)
13239 len = sprintf (*stats,
13240 ngettext ("linker stubs in %u group\n",
13241 "linker stubs in %u groups\n",
13244 sprintf (*stats + len, _(" branch %lu\n"
13245 " branch toc adj %lu\n"
13246 " branch notoc %lu\n"
13247 " branch both %lu\n"
13248 " long branch %lu\n"
13249 " long toc adj %lu\n"
13250 " long notoc %lu\n"
13253 " plt call save %lu\n"
13254 " plt call notoc %lu\n"
13255 " plt call both %lu\n"
13256 " global entry %lu"),
13257 htab->stub_count[ppc_stub_long_branch - 1],
13258 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13259 htab->stub_count[ppc_stub_long_branch_notoc - 1],
13260 htab->stub_count[ppc_stub_long_branch_both - 1],
13261 htab->stub_count[ppc_stub_plt_branch - 1],
13262 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13263 htab->stub_count[ppc_stub_plt_branch_notoc - 1],
13264 htab->stub_count[ppc_stub_plt_branch_both - 1],
13265 htab->stub_count[ppc_stub_plt_call - 1],
13266 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13267 htab->stub_count[ppc_stub_plt_call_notoc - 1],
13268 htab->stub_count[ppc_stub_plt_call_both - 1],
13269 htab->stub_count[ppc_stub_global_entry - 1]);
13274 /* What to do when ld finds relocations against symbols defined in
13275 discarded sections. */
13277 static unsigned int
13278 ppc64_elf_action_discarded (asection *sec)
13280 if (strcmp (".opd", sec->name) == 0)
13283 if (strcmp (".toc", sec->name) == 0)
13286 if (strcmp (".toc1", sec->name) == 0)
13289 return _bfd_elf_default_action_discarded (sec);
13292 /* The RELOCATE_SECTION function is called by the ELF backend linker
13293 to handle the relocations for a section.
13295 The relocs are always passed as Rela structures; if the section
13296 actually uses Rel structures, the r_addend field will always be
13299 This function is responsible for adjust the section contents as
13300 necessary, and (if using Rela relocs and generating a
13301 relocatable output file) adjusting the reloc addend as
13304 This function does not have to worry about setting the reloc
13305 address or the reloc symbol index.
13307 LOCAL_SYMS is a pointer to the swapped in local symbols.
13309 LOCAL_SECTIONS is an array giving the section in the input file
13310 corresponding to the st_shndx field of each local symbol.
13312 The global hash table entry for the global symbols can be found
13313 via elf_sym_hashes (input_bfd).
13315 When generating relocatable output, this function must handle
13316 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13317 going to be the section symbol corresponding to the output
13318 section, which means that the addend must be adjusted
13322 ppc64_elf_relocate_section (bfd *output_bfd,
13323 struct bfd_link_info *info,
13325 asection *input_section,
13326 bfd_byte *contents,
13327 Elf_Internal_Rela *relocs,
13328 Elf_Internal_Sym *local_syms,
13329 asection **local_sections)
13331 struct ppc_link_hash_table *htab;
13332 Elf_Internal_Shdr *symtab_hdr;
13333 struct elf_link_hash_entry **sym_hashes;
13334 Elf_Internal_Rela *rel;
13335 Elf_Internal_Rela *wrel;
13336 Elf_Internal_Rela *relend;
13337 Elf_Internal_Rela outrel;
13339 struct got_entry **local_got_ents;
13341 bfd_boolean ret = TRUE;
13342 bfd_boolean is_opd;
13343 /* Assume 'at' branch hints. */
13344 bfd_boolean is_isa_v2 = TRUE;
13345 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13347 /* Initialize howto table if needed. */
13348 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13351 htab = ppc_hash_table (info);
13355 /* Don't relocate stub sections. */
13356 if (input_section->owner == htab->params->stub_bfd)
13359 BFD_ASSERT (is_ppc64_elf (input_bfd));
13361 local_got_ents = elf_local_got_ents (input_bfd);
13362 TOCstart = elf_gp (output_bfd);
13363 symtab_hdr = &elf_symtab_hdr (input_bfd);
13364 sym_hashes = elf_sym_hashes (input_bfd);
13365 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13367 rel = wrel = relocs;
13368 relend = relocs + input_section->reloc_count;
13369 for (; rel < relend; wrel++, rel++)
13371 enum elf_ppc64_reloc_type r_type;
13373 bfd_reloc_status_type r;
13374 Elf_Internal_Sym *sym;
13376 struct elf_link_hash_entry *h_elf;
13377 struct ppc_link_hash_entry *h;
13378 struct ppc_link_hash_entry *fdh;
13379 const char *sym_name;
13380 unsigned long r_symndx, toc_symndx;
13381 bfd_vma toc_addend;
13382 unsigned char tls_mask, tls_gd, tls_type;
13383 unsigned char sym_type;
13384 bfd_vma relocation;
13385 bfd_boolean unresolved_reloc, save_unresolved_reloc;
13386 bfd_boolean warned;
13387 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13390 struct ppc_stub_hash_entry *stub_entry;
13391 bfd_vma max_br_offset;
13393 Elf_Internal_Rela orig_rel;
13394 reloc_howto_type *howto;
13395 struct reloc_howto_struct alt_howto;
13400 r_type = ELF64_R_TYPE (rel->r_info);
13401 r_symndx = ELF64_R_SYM (rel->r_info);
13403 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13404 symbol of the previous ADDR64 reloc. The symbol gives us the
13405 proper TOC base to use. */
13406 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13408 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13410 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13416 unresolved_reloc = FALSE;
13419 if (r_symndx < symtab_hdr->sh_info)
13421 /* It's a local symbol. */
13422 struct _opd_sec_data *opd;
13424 sym = local_syms + r_symndx;
13425 sec = local_sections[r_symndx];
13426 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13427 sym_type = ELF64_ST_TYPE (sym->st_info);
13428 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13429 opd = get_opd_info (sec);
13430 if (opd != NULL && opd->adjust != NULL)
13432 long adjust = opd->adjust[OPD_NDX (sym->st_value
13438 /* If this is a relocation against the opd section sym
13439 and we have edited .opd, adjust the reloc addend so
13440 that ld -r and ld --emit-relocs output is correct.
13441 If it is a reloc against some other .opd symbol,
13442 then the symbol value will be adjusted later. */
13443 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13444 rel->r_addend += adjust;
13446 relocation += adjust;
13452 bfd_boolean ignored;
13454 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13455 r_symndx, symtab_hdr, sym_hashes,
13456 h_elf, sec, relocation,
13457 unresolved_reloc, warned, ignored);
13458 sym_name = h_elf->root.root.string;
13459 sym_type = h_elf->type;
13461 && sec->owner == output_bfd
13462 && strcmp (sec->name, ".opd") == 0)
13464 /* This is a symbol defined in a linker script. All
13465 such are defined in output sections, even those
13466 defined by simple assignment from a symbol defined in
13467 an input section. Transfer the symbol to an
13468 appropriate input .opd section, so that a branch to
13469 this symbol will be mapped to the location specified
13470 by the opd entry. */
13471 struct bfd_link_order *lo;
13472 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13473 if (lo->type == bfd_indirect_link_order)
13475 asection *isec = lo->u.indirect.section;
13476 if (h_elf->root.u.def.value >= isec->output_offset
13477 && h_elf->root.u.def.value < (isec->output_offset
13480 h_elf->root.u.def.value -= isec->output_offset;
13481 h_elf->root.u.def.section = isec;
13488 h = (struct ppc_link_hash_entry *) h_elf;
13490 if (sec != NULL && discarded_section (sec))
13492 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13493 input_bfd, input_section,
13494 contents + rel->r_offset);
13495 wrel->r_offset = rel->r_offset;
13497 wrel->r_addend = 0;
13499 /* For ld -r, remove relocations in debug sections against
13500 symbols defined in discarded sections. Not done for
13501 non-debug to preserve relocs in .eh_frame which the
13502 eh_frame editing code expects to be present. */
13503 if (bfd_link_relocatable (info)
13504 && (input_section->flags & SEC_DEBUGGING))
13510 if (bfd_link_relocatable (info))
13513 if (h != NULL && &h->elf == htab->elf.hgot)
13515 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13516 sec = bfd_abs_section_ptr;
13517 unresolved_reloc = FALSE;
13520 /* TLS optimizations. Replace instruction sequences and relocs
13521 based on information we collected in tls_optimize. We edit
13522 RELOCS so that --emit-relocs will output something sensible
13523 for the final instruction stream. */
13528 tls_mask = h->tls_mask;
13529 else if (local_got_ents != NULL)
13531 struct plt_entry **local_plt = (struct plt_entry **)
13532 (local_got_ents + symtab_hdr->sh_info);
13533 unsigned char *lgot_masks = (unsigned char *)
13534 (local_plt + symtab_hdr->sh_info);
13535 tls_mask = lgot_masks[r_symndx];
13537 if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK))
13538 && (r_type == R_PPC64_TLS
13539 || r_type == R_PPC64_TLSGD
13540 || r_type == R_PPC64_TLSLD))
13542 /* Check for toc tls entries. */
13543 unsigned char *toc_tls;
13545 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13546 &local_syms, rel, input_bfd))
13550 tls_mask = *toc_tls;
13553 /* Check that tls relocs are used with tls syms, and non-tls
13554 relocs are used with non-tls syms. */
13555 if (r_symndx != STN_UNDEF
13556 && r_type != R_PPC64_NONE
13558 || h->elf.root.type == bfd_link_hash_defined
13559 || h->elf.root.type == bfd_link_hash_defweak)
13560 && (IS_PPC64_TLS_RELOC (r_type)
13561 != (sym_type == STT_TLS
13562 || (sym_type == STT_SECTION
13563 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13565 if ((tls_mask & TLS_TLS) != 0
13566 && (r_type == R_PPC64_TLS
13567 || r_type == R_PPC64_TLSGD
13568 || r_type == R_PPC64_TLSLD))
13569 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13572 info->callbacks->einfo
13573 (!IS_PPC64_TLS_RELOC (r_type)
13574 /* xgettext:c-format */
13575 ? _("%H: %s used with TLS symbol `%pT'\n")
13576 /* xgettext:c-format */
13577 : _("%H: %s used with non-TLS symbol `%pT'\n"),
13578 input_bfd, input_section, rel->r_offset,
13579 ppc64_elf_howto_table[r_type]->name,
13583 /* Ensure reloc mapping code below stays sane. */
13584 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13585 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13586 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13587 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13588 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13589 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13590 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13591 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13592 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13593 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13601 case R_PPC64_LO_DS_OPT:
13602 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13603 if ((insn & (0x3f << 26)) != 58u << 26)
13605 insn += (14u << 26) - (58u << 26);
13606 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13607 r_type = R_PPC64_TOC16_LO;
13608 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13611 case R_PPC64_TOC16:
13612 case R_PPC64_TOC16_LO:
13613 case R_PPC64_TOC16_DS:
13614 case R_PPC64_TOC16_LO_DS:
13616 /* Check for toc tls entries. */
13617 unsigned char *toc_tls;
13620 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13621 &local_syms, rel, input_bfd);
13627 tls_mask = *toc_tls;
13628 if (r_type == R_PPC64_TOC16_DS
13629 || r_type == R_PPC64_TOC16_LO_DS)
13631 if ((tls_mask & TLS_TLS) != 0
13632 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13637 /* If we found a GD reloc pair, then we might be
13638 doing a GD->IE transition. */
13641 tls_gd = TLS_TPRELGD;
13642 if ((tls_mask & TLS_TLS) != 0
13643 && (tls_mask & TLS_GD) == 0)
13646 else if (retval == 3)
13648 if ((tls_mask & TLS_TLS) != 0
13649 && (tls_mask & TLS_LD) == 0)
13657 case R_PPC64_GOT_TPREL16_HI:
13658 case R_PPC64_GOT_TPREL16_HA:
13659 if ((tls_mask & TLS_TLS) != 0
13660 && (tls_mask & TLS_TPREL) == 0)
13662 rel->r_offset -= d_offset;
13663 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13664 r_type = R_PPC64_NONE;
13665 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13669 case R_PPC64_GOT_TPREL16_DS:
13670 case R_PPC64_GOT_TPREL16_LO_DS:
13671 if ((tls_mask & TLS_TLS) != 0
13672 && (tls_mask & TLS_TPREL) == 0)
13675 insn = bfd_get_32 (input_bfd,
13676 contents + rel->r_offset - d_offset);
13678 insn |= 0x3c0d0000; /* addis 0,13,0 */
13679 bfd_put_32 (input_bfd, insn,
13680 contents + rel->r_offset - d_offset);
13681 r_type = R_PPC64_TPREL16_HA;
13682 if (toc_symndx != 0)
13684 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13685 rel->r_addend = toc_addend;
13686 /* We changed the symbol. Start over in order to
13687 get h, sym, sec etc. right. */
13691 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13696 if ((tls_mask & TLS_TLS) != 0
13697 && (tls_mask & TLS_TPREL) == 0)
13699 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13700 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13703 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13704 /* Was PPC64_TLS which sits on insn boundary, now
13705 PPC64_TPREL16_LO which is at low-order half-word. */
13706 rel->r_offset += d_offset;
13707 r_type = R_PPC64_TPREL16_LO;
13708 if (toc_symndx != 0)
13710 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13711 rel->r_addend = toc_addend;
13712 /* We changed the symbol. Start over in order to
13713 get h, sym, sec etc. right. */
13717 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13721 case R_PPC64_GOT_TLSGD16_HI:
13722 case R_PPC64_GOT_TLSGD16_HA:
13723 tls_gd = TLS_TPRELGD;
13724 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
13728 case R_PPC64_GOT_TLSLD16_HI:
13729 case R_PPC64_GOT_TLSLD16_HA:
13730 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
13733 if ((tls_mask & tls_gd) != 0)
13734 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13735 + R_PPC64_GOT_TPREL16_DS);
13738 rel->r_offset -= d_offset;
13739 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13740 r_type = R_PPC64_NONE;
13742 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13746 case R_PPC64_GOT_TLSGD16:
13747 case R_PPC64_GOT_TLSGD16_LO:
13748 tls_gd = TLS_TPRELGD;
13749 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
13753 case R_PPC64_GOT_TLSLD16:
13754 case R_PPC64_GOT_TLSLD16_LO:
13755 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
13757 unsigned int insn1, insn2;
13761 offset = (bfd_vma) -1;
13762 /* If not using the newer R_PPC64_TLSGD/LD to mark
13763 __tls_get_addr calls, we must trust that the call
13764 stays with its arg setup insns, ie. that the next
13765 reloc is the __tls_get_addr call associated with
13766 the current reloc. Edit both insns. */
13767 if (input_section->has_tls_get_addr_call
13768 && rel + 1 < relend
13769 && branch_reloc_hash_match (input_bfd, rel + 1,
13770 htab->tls_get_addr,
13771 htab->tls_get_addr_fd))
13772 offset = rel[1].r_offset;
13773 /* We read the low GOT_TLS (or TOC16) insn because we
13774 need to keep the destination reg. It may be
13775 something other than the usual r3, and moved to r3
13776 before the call by intervening code. */
13777 insn1 = bfd_get_32 (input_bfd,
13778 contents + rel->r_offset - d_offset);
13779 if ((tls_mask & tls_gd) != 0)
13782 insn1 &= (0x1f << 21) | (0x1f << 16);
13783 insn1 |= 58 << 26; /* ld */
13784 insn2 = 0x7c636a14; /* add 3,3,13 */
13785 if (offset != (bfd_vma) -1)
13786 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13787 if ((tls_mask & TLS_EXPLICIT) == 0)
13788 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13789 + R_PPC64_GOT_TPREL16_DS);
13791 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13792 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13797 insn1 &= 0x1f << 21;
13798 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13799 insn2 = 0x38630000; /* addi 3,3,0 */
13802 /* Was an LD reloc. */
13804 sec = local_sections[toc_symndx];
13806 r_symndx < symtab_hdr->sh_info;
13808 if (local_sections[r_symndx] == sec)
13810 if (r_symndx >= symtab_hdr->sh_info)
13811 r_symndx = STN_UNDEF;
13812 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13813 if (r_symndx != STN_UNDEF)
13814 rel->r_addend -= (local_syms[r_symndx].st_value
13815 + sec->output_offset
13816 + sec->output_section->vma);
13818 else if (toc_symndx != 0)
13820 r_symndx = toc_symndx;
13821 rel->r_addend = toc_addend;
13823 r_type = R_PPC64_TPREL16_HA;
13824 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13825 if (offset != (bfd_vma) -1)
13827 rel[1].r_info = ELF64_R_INFO (r_symndx,
13828 R_PPC64_TPREL16_LO);
13829 rel[1].r_offset = offset + d_offset;
13830 rel[1].r_addend = rel->r_addend;
13833 bfd_put_32 (input_bfd, insn1,
13834 contents + rel->r_offset - d_offset);
13835 if (offset != (bfd_vma) -1)
13836 bfd_put_32 (input_bfd, insn2, contents + offset);
13837 if ((tls_mask & tls_gd) == 0
13838 && (tls_gd == 0 || toc_symndx != 0))
13840 /* We changed the symbol. Start over in order
13841 to get h, sym, sec etc. right. */
13847 case R_PPC64_TLSGD:
13848 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
13849 && rel + 1 < relend)
13851 unsigned int insn2;
13852 bfd_vma offset = rel->r_offset;
13854 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
13856 bfd_put_32 (output_bfd, NOP, contents + offset);
13857 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13861 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
13862 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
13864 if ((tls_mask & TLS_TPRELGD) != 0)
13867 r_type = R_PPC64_NONE;
13868 insn2 = 0x7c636a14; /* add 3,3,13 */
13873 if (toc_symndx != 0)
13875 r_symndx = toc_symndx;
13876 rel->r_addend = toc_addend;
13878 r_type = R_PPC64_TPREL16_LO;
13879 rel->r_offset = offset + d_offset;
13880 insn2 = 0x38630000; /* addi 3,3,0 */
13882 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13883 /* Zap the reloc on the _tls_get_addr call too. */
13884 BFD_ASSERT (offset == rel[1].r_offset);
13885 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13886 bfd_put_32 (input_bfd, insn2, contents + offset);
13887 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13892 case R_PPC64_TLSLD:
13893 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
13894 && rel + 1 < relend)
13896 unsigned int insn2;
13897 bfd_vma offset = rel->r_offset;
13899 if (is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info)))
13901 bfd_put_32 (output_bfd, NOP, contents + offset);
13902 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13906 if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL)
13907 bfd_put_32 (output_bfd, NOP, contents + offset + 4);
13910 sec = local_sections[toc_symndx];
13912 r_symndx < symtab_hdr->sh_info;
13914 if (local_sections[r_symndx] == sec)
13916 if (r_symndx >= symtab_hdr->sh_info)
13917 r_symndx = STN_UNDEF;
13918 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13919 if (r_symndx != STN_UNDEF)
13920 rel->r_addend -= (local_syms[r_symndx].st_value
13921 + sec->output_offset
13922 + sec->output_section->vma);
13924 r_type = R_PPC64_TPREL16_LO;
13925 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13926 rel->r_offset = offset + d_offset;
13927 /* Zap the reloc on the _tls_get_addr call too. */
13928 BFD_ASSERT (offset == rel[1].r_offset);
13929 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13930 insn2 = 0x38630000; /* addi 3,3,0 */
13931 bfd_put_32 (input_bfd, insn2, contents + offset);
13936 case R_PPC64_DTPMOD64:
13937 if (rel + 1 < relend
13938 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13939 && rel[1].r_offset == rel->r_offset + 8)
13941 if ((tls_mask & TLS_GD) == 0)
13943 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13944 if ((tls_mask & TLS_TPRELGD) != 0)
13945 r_type = R_PPC64_TPREL64;
13948 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13949 r_type = R_PPC64_NONE;
13951 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13956 if ((tls_mask & TLS_LD) == 0)
13958 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13959 r_type = R_PPC64_NONE;
13960 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13965 case R_PPC64_TPREL64:
13966 if ((tls_mask & TLS_TPREL) == 0)
13968 r_type = R_PPC64_NONE;
13969 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13973 case R_PPC64_ENTRY:
13974 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13975 if (!bfd_link_pic (info)
13976 && !info->traditional_format
13977 && relocation + 0x80008000 <= 0xffffffff)
13979 unsigned int insn1, insn2;
13981 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13982 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13983 if ((insn1 & ~0xfffc) == LD_R2_0R12
13984 && insn2 == ADD_R2_R2_R12)
13986 bfd_put_32 (input_bfd,
13987 LIS_R2 + PPC_HA (relocation),
13988 contents + rel->r_offset);
13989 bfd_put_32 (input_bfd,
13990 ADDI_R2_R2 + PPC_LO (relocation),
13991 contents + rel->r_offset + 4);
13996 relocation -= (rel->r_offset
13997 + input_section->output_offset
13998 + input_section->output_section->vma);
13999 if (relocation + 0x80008000 <= 0xffffffff)
14001 unsigned int insn1, insn2;
14003 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14004 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14005 if ((insn1 & ~0xfffc) == LD_R2_0R12
14006 && insn2 == ADD_R2_R2_R12)
14008 bfd_put_32 (input_bfd,
14009 ADDIS_R2_R12 + PPC_HA (relocation),
14010 contents + rel->r_offset);
14011 bfd_put_32 (input_bfd,
14012 ADDI_R2_R2 + PPC_LO (relocation),
14013 contents + rel->r_offset + 4);
14019 case R_PPC64_REL16_HA:
14020 /* If we are generating a non-PIC executable, edit
14021 . 0: addis 2,12,.TOC.-0b@ha
14022 . addi 2,2,.TOC.-0b@l
14023 used by ELFv2 global entry points to set up r2, to
14026 if .TOC. is in range. */
14027 if (!bfd_link_pic (info)
14028 && !info->traditional_format
14030 && rel->r_addend == d_offset
14031 && h != NULL && &h->elf == htab->elf.hgot
14032 && rel + 1 < relend
14033 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14034 && rel[1].r_offset == rel->r_offset + 4
14035 && rel[1].r_addend == rel->r_addend + 4
14036 && relocation + 0x80008000 <= 0xffffffff)
14038 unsigned int insn1, insn2;
14039 bfd_vma offset = rel->r_offset - d_offset;
14040 insn1 = bfd_get_32 (input_bfd, contents + offset);
14041 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14042 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14043 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14045 r_type = R_PPC64_ADDR16_HA;
14046 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14047 rel->r_addend -= d_offset;
14048 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14049 rel[1].r_addend -= d_offset + 4;
14050 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14056 /* Handle other relocations that tweak non-addend part of insn. */
14058 max_br_offset = 1 << 25;
14059 addend = rel->r_addend;
14060 reloc_dest = DEST_NORMAL;
14066 case R_PPC64_TOCSAVE:
14067 if (relocation + addend == (rel->r_offset
14068 + input_section->output_offset
14069 + input_section->output_section->vma)
14070 && tocsave_find (htab, NO_INSERT,
14071 &local_syms, rel, input_bfd))
14073 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14075 || insn == CROR_151515 || insn == CROR_313131)
14076 bfd_put_32 (input_bfd,
14077 STD_R2_0R1 + STK_TOC (htab),
14078 contents + rel->r_offset);
14082 /* Branch taken prediction relocations. */
14083 case R_PPC64_ADDR14_BRTAKEN:
14084 case R_PPC64_REL14_BRTAKEN:
14085 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14086 /* Fall through. */
14088 /* Branch not taken prediction relocations. */
14089 case R_PPC64_ADDR14_BRNTAKEN:
14090 case R_PPC64_REL14_BRNTAKEN:
14091 insn |= bfd_get_32 (input_bfd,
14092 contents + rel->r_offset) & ~(0x01 << 21);
14093 /* Fall through. */
14095 case R_PPC64_REL14:
14096 max_br_offset = 1 << 15;
14097 /* Fall through. */
14099 case R_PPC64_REL24:
14100 case R_PPC64_REL24_NOTOC:
14101 case R_PPC64_PLTCALL:
14102 /* Calls to functions with a different TOC, such as calls to
14103 shared objects, need to alter the TOC pointer. This is
14104 done using a linkage stub. A REL24 branching to these
14105 linkage stubs needs to be followed by a nop, as the nop
14106 will be replaced with an instruction to restore the TOC
14111 && h->oh->is_func_descriptor)
14112 fdh = ppc_follow_link (h->oh);
14113 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14115 if (r_type == R_PPC64_PLTCALL
14116 && stub_entry != NULL
14117 && stub_entry->stub_type >= ppc_stub_plt_call
14118 && stub_entry->stub_type <= ppc_stub_plt_call_both)
14121 if (stub_entry != NULL
14122 && ((stub_entry->stub_type >= ppc_stub_plt_call
14123 && stub_entry->stub_type <= ppc_stub_plt_call_both)
14124 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14125 || stub_entry->stub_type == ppc_stub_plt_branch_both
14126 || stub_entry->stub_type == ppc_stub_long_branch_r2off
14127 || stub_entry->stub_type == ppc_stub_long_branch_both))
14129 bfd_boolean can_plt_call = FALSE;
14131 if (stub_entry->stub_type == ppc_stub_plt_call
14133 && htab->params->plt_localentry0 != 0
14134 && is_elfv2_localentry0 (&h->elf))
14136 /* The function doesn't use or change r2. */
14137 can_plt_call = TRUE;
14139 else if (r_type == R_PPC64_REL24_NOTOC)
14141 /* NOTOC calls don't need to restore r2. */
14142 can_plt_call = TRUE;
14145 /* All of these stubs may modify r2, so there must be a
14146 branch and link followed by a nop. The nop is
14147 replaced by an insn to restore r2. */
14148 else if (rel->r_offset + 8 <= input_section->size)
14152 br = bfd_get_32 (input_bfd,
14153 contents + rel->r_offset);
14158 nop = bfd_get_32 (input_bfd,
14159 contents + rel->r_offset + 4);
14160 if (nop == LD_R2_0R1 + STK_TOC (htab))
14161 can_plt_call = TRUE;
14162 else if (nop == NOP
14163 || nop == CROR_151515
14164 || nop == CROR_313131)
14167 && (h == htab->tls_get_addr_fd
14168 || h == htab->tls_get_addr)
14169 && htab->params->tls_get_addr_opt)
14171 /* Special stub used, leave nop alone. */
14174 bfd_put_32 (input_bfd,
14175 LD_R2_0R1 + STK_TOC (htab),
14176 contents + rel->r_offset + 4);
14177 can_plt_call = TRUE;
14182 if (!can_plt_call && h != NULL)
14184 const char *name = h->elf.root.root.string;
14189 if (strncmp (name, "__libc_start_main", 17) == 0
14190 && (name[17] == 0 || name[17] == '@'))
14192 /* Allow crt1 branch to go via a toc adjusting
14193 stub. Other calls that never return could do
14194 the same, if we could detect such. */
14195 can_plt_call = TRUE;
14201 /* g++ as of 20130507 emits self-calls without a
14202 following nop. This is arguably wrong since we
14203 have conflicting information. On the one hand a
14204 global symbol and on the other a local call
14205 sequence, but don't error for this special case.
14206 It isn't possible to cheaply verify we have
14207 exactly such a call. Allow all calls to the same
14209 asection *code_sec = sec;
14211 if (get_opd_info (sec) != NULL)
14213 bfd_vma off = (relocation + addend
14214 - sec->output_section->vma
14215 - sec->output_offset);
14217 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14219 if (code_sec == input_section)
14220 can_plt_call = TRUE;
14225 if (stub_entry->stub_type >= ppc_stub_plt_call
14226 && stub_entry->stub_type <= ppc_stub_plt_call_both)
14227 info->callbacks->einfo
14228 /* xgettext:c-format */
14229 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14230 "(plt call stub)\n"),
14231 input_bfd, input_section, rel->r_offset, sym_name);
14233 info->callbacks->einfo
14234 /* xgettext:c-format */
14235 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14236 "(toc save/adjust stub)\n"),
14237 input_bfd, input_section, rel->r_offset, sym_name);
14239 bfd_set_error (bfd_error_bad_value);
14244 && stub_entry->stub_type >= ppc_stub_plt_call
14245 && stub_entry->stub_type <= ppc_stub_plt_call_both)
14246 unresolved_reloc = FALSE;
14249 if ((stub_entry == NULL
14250 || stub_entry->stub_type == ppc_stub_long_branch
14251 || stub_entry->stub_type == ppc_stub_plt_branch)
14252 && get_opd_info (sec) != NULL)
14254 /* The branch destination is the value of the opd entry. */
14255 bfd_vma off = (relocation + addend
14256 - sec->output_section->vma
14257 - sec->output_offset);
14258 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14259 if (dest != (bfd_vma) -1)
14263 reloc_dest = DEST_OPD;
14267 /* If the branch is out of reach we ought to have a long
14269 from = (rel->r_offset
14270 + input_section->output_offset
14271 + input_section->output_section->vma);
14273 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14277 if (stub_entry != NULL
14278 && (stub_entry->stub_type == ppc_stub_long_branch
14279 || stub_entry->stub_type == ppc_stub_plt_branch)
14280 && (r_type == R_PPC64_ADDR14_BRTAKEN
14281 || r_type == R_PPC64_ADDR14_BRNTAKEN
14282 || (relocation + addend - from + max_br_offset
14283 < 2 * max_br_offset)))
14284 /* Don't use the stub if this branch is in range. */
14287 if (stub_entry != NULL
14288 && (stub_entry->stub_type == ppc_stub_long_branch_notoc
14289 || stub_entry->stub_type == ppc_stub_long_branch_both
14290 || stub_entry->stub_type == ppc_stub_plt_branch_notoc
14291 || stub_entry->stub_type == ppc_stub_plt_branch_both)
14292 && (r_type != R_PPC64_REL24_NOTOC
14293 || ((fdh ? fdh->elf.other : sym->st_other)
14294 & STO_PPC64_LOCAL_MASK) == 1 << STO_PPC64_LOCAL_BIT)
14295 && (relocation + addend - from + max_br_offset
14296 < 2 * max_br_offset))
14299 if (stub_entry != NULL
14300 && (stub_entry->stub_type == ppc_stub_long_branch_r2off
14301 || stub_entry->stub_type == ppc_stub_long_branch_both
14302 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14303 || stub_entry->stub_type == ppc_stub_plt_branch_both)
14304 && r_type == R_PPC64_REL24_NOTOC
14305 && (relocation + addend - from + max_br_offset
14306 < 2 * max_br_offset))
14309 if (stub_entry != NULL)
14311 /* Munge up the value and addend so that we call the stub
14312 rather than the procedure directly. */
14313 asection *stub_sec = stub_entry->group->stub_sec;
14315 if (stub_entry->stub_type == ppc_stub_save_res)
14316 relocation += (stub_sec->output_offset
14317 + stub_sec->output_section->vma
14318 + stub_sec->size - htab->sfpr->size
14319 - htab->sfpr->output_offset
14320 - htab->sfpr->output_section->vma);
14322 relocation = (stub_entry->stub_offset
14323 + stub_sec->output_offset
14324 + stub_sec->output_section->vma);
14326 reloc_dest = DEST_STUB;
14328 if (((stub_entry->stub_type == ppc_stub_plt_call
14329 && ALWAYS_EMIT_R2SAVE)
14330 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14331 || stub_entry->stub_type == ppc_stub_plt_call_both)
14333 && (h == htab->tls_get_addr_fd
14334 || h == htab->tls_get_addr)
14335 && htab->params->tls_get_addr_opt)
14336 && rel + 1 < relend
14337 && rel[1].r_offset == rel->r_offset + 4
14338 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14340 else if ((stub_entry->stub_type == ppc_stub_long_branch_both
14341 || stub_entry->stub_type == ppc_stub_plt_branch_both
14342 || stub_entry->stub_type == ppc_stub_plt_call_both)
14343 && r_type == R_PPC64_REL24_NOTOC)
14351 /* Set 'a' bit. This is 0b00010 in BO field for branch
14352 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14353 for branch on CTR insns (BO == 1a00t or 1a01t). */
14354 if ((insn & (0x14 << 21)) == (0x04 << 21))
14355 insn |= 0x02 << 21;
14356 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14357 insn |= 0x08 << 21;
14363 /* Invert 'y' bit if not the default. */
14364 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14365 insn ^= 0x01 << 21;
14368 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14371 /* NOP out calls to undefined weak functions.
14372 We can thus call a weak function without first
14373 checking whether the function is defined. */
14375 && h->elf.root.type == bfd_link_hash_undefweak
14376 && h->elf.dynindx == -1
14377 && (r_type == R_PPC64_REL24
14378 || r_type == R_PPC64_REL24_NOTOC)
14382 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14388 /* Set `addend'. */
14390 save_unresolved_reloc = unresolved_reloc;
14394 /* xgettext:c-format */
14395 _bfd_error_handler (_("%pB: %s unsupported"),
14396 input_bfd, ppc64_elf_howto_table[r_type]->name);
14398 bfd_set_error (bfd_error_bad_value);
14404 case R_PPC64_TLSGD:
14405 case R_PPC64_TLSLD:
14406 case R_PPC64_TOCSAVE:
14407 case R_PPC64_GNU_VTINHERIT:
14408 case R_PPC64_GNU_VTENTRY:
14409 case R_PPC64_ENTRY:
14412 /* GOT16 relocations. Like an ADDR16 using the symbol's
14413 address in the GOT as relocation value instead of the
14414 symbol's value itself. Also, create a GOT entry for the
14415 symbol and put the symbol value there. */
14416 case R_PPC64_GOT_TLSGD16:
14417 case R_PPC64_GOT_TLSGD16_LO:
14418 case R_PPC64_GOT_TLSGD16_HI:
14419 case R_PPC64_GOT_TLSGD16_HA:
14420 tls_type = TLS_TLS | TLS_GD;
14423 case R_PPC64_GOT_TLSLD16:
14424 case R_PPC64_GOT_TLSLD16_LO:
14425 case R_PPC64_GOT_TLSLD16_HI:
14426 case R_PPC64_GOT_TLSLD16_HA:
14427 tls_type = TLS_TLS | TLS_LD;
14430 case R_PPC64_GOT_TPREL16_DS:
14431 case R_PPC64_GOT_TPREL16_LO_DS:
14432 case R_PPC64_GOT_TPREL16_HI:
14433 case R_PPC64_GOT_TPREL16_HA:
14434 tls_type = TLS_TLS | TLS_TPREL;
14437 case R_PPC64_GOT_DTPREL16_DS:
14438 case R_PPC64_GOT_DTPREL16_LO_DS:
14439 case R_PPC64_GOT_DTPREL16_HI:
14440 case R_PPC64_GOT_DTPREL16_HA:
14441 tls_type = TLS_TLS | TLS_DTPREL;
14444 case R_PPC64_GOT16:
14445 case R_PPC64_GOT16_LO:
14446 case R_PPC64_GOT16_HI:
14447 case R_PPC64_GOT16_HA:
14448 case R_PPC64_GOT16_DS:
14449 case R_PPC64_GOT16_LO_DS:
14452 /* Relocation is to the entry for this symbol in the global
14457 unsigned long indx = 0;
14458 struct got_entry *ent;
14460 if (tls_type == (TLS_TLS | TLS_LD)
14462 || !h->elf.def_dynamic))
14463 ent = ppc64_tlsld_got (input_bfd);
14468 if (!htab->elf.dynamic_sections_created
14469 || h->elf.dynindx == -1
14470 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14471 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14472 /* This is actually a static link, or it is a
14473 -Bsymbolic link and the symbol is defined
14474 locally, or the symbol was forced to be local
14475 because of a version file. */
14479 indx = h->elf.dynindx;
14480 unresolved_reloc = FALSE;
14482 ent = h->elf.got.glist;
14486 if (local_got_ents == NULL)
14488 ent = local_got_ents[r_symndx];
14491 for (; ent != NULL; ent = ent->next)
14492 if (ent->addend == orig_rel.r_addend
14493 && ent->owner == input_bfd
14494 && ent->tls_type == tls_type)
14500 if (ent->is_indirect)
14501 ent = ent->got.ent;
14502 offp = &ent->got.offset;
14503 got = ppc64_elf_tdata (ent->owner)->got;
14507 /* The offset must always be a multiple of 8. We use the
14508 least significant bit to record whether we have already
14509 processed this entry. */
14511 if ((off & 1) != 0)
14515 /* Generate relocs for the dynamic linker, except in
14516 the case of TLSLD where we'll use one entry per
14524 ? h->elf.type == STT_GNU_IFUNC
14525 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14528 relgot = htab->elf.irelplt;
14530 htab->local_ifunc_resolver = 1;
14531 else if (is_static_defined (&h->elf))
14532 htab->maybe_local_ifunc_resolver = 1;
14535 || (bfd_link_pic (info)
14537 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14538 || (tls_type == (TLS_TLS | TLS_LD)
14539 && !h->elf.def_dynamic))
14540 && !(tls_type == (TLS_TLS | TLS_TPREL)
14541 && bfd_link_executable (info)
14542 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14543 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14544 if (relgot != NULL)
14546 outrel.r_offset = (got->output_section->vma
14547 + got->output_offset
14549 outrel.r_addend = addend;
14550 if (tls_type & (TLS_LD | TLS_GD))
14552 outrel.r_addend = 0;
14553 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14554 if (tls_type == (TLS_TLS | TLS_GD))
14556 loc = relgot->contents;
14557 loc += (relgot->reloc_count++
14558 * sizeof (Elf64_External_Rela));
14559 bfd_elf64_swap_reloca_out (output_bfd,
14561 outrel.r_offset += 8;
14562 outrel.r_addend = addend;
14564 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14567 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14568 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14569 else if (tls_type == (TLS_TLS | TLS_TPREL))
14570 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14571 else if (indx != 0)
14572 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14576 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14578 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14580 /* Write the .got section contents for the sake
14582 loc = got->contents + off;
14583 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14587 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14589 outrel.r_addend += relocation;
14590 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14592 if (htab->elf.tls_sec == NULL)
14593 outrel.r_addend = 0;
14595 outrel.r_addend -= htab->elf.tls_sec->vma;
14598 loc = relgot->contents;
14599 loc += (relgot->reloc_count++
14600 * sizeof (Elf64_External_Rela));
14601 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14604 /* Init the .got section contents here if we're not
14605 emitting a reloc. */
14608 relocation += addend;
14611 if (htab->elf.tls_sec == NULL)
14615 if (tls_type & TLS_LD)
14618 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14619 if (tls_type & TLS_TPREL)
14620 relocation += DTP_OFFSET - TP_OFFSET;
14623 if (tls_type & (TLS_GD | TLS_LD))
14625 bfd_put_64 (output_bfd, relocation,
14626 got->contents + off + 8);
14630 bfd_put_64 (output_bfd, relocation,
14631 got->contents + off);
14635 if (off >= (bfd_vma) -2)
14638 relocation = got->output_section->vma + got->output_offset + off;
14639 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14643 case R_PPC64_PLT16_HA:
14644 case R_PPC64_PLT16_HI:
14645 case R_PPC64_PLT16_LO:
14646 case R_PPC64_PLT16_LO_DS:
14647 case R_PPC64_PLT32:
14648 case R_PPC64_PLT64:
14649 case R_PPC64_PLTSEQ:
14650 case R_PPC64_PLTCALL:
14651 /* Relocation is to the entry for this symbol in the
14652 procedure linkage table. */
14653 unresolved_reloc = TRUE;
14655 struct plt_entry **plt_list = NULL;
14657 plt_list = &h->elf.plt.plist;
14658 else if (local_got_ents != NULL)
14660 struct plt_entry **local_plt = (struct plt_entry **)
14661 (local_got_ents + symtab_hdr->sh_info);
14662 plt_list = local_plt + r_symndx;
14666 struct plt_entry *ent;
14668 for (ent = *plt_list; ent != NULL; ent = ent->next)
14669 if (ent->plt.offset != (bfd_vma) -1
14670 && ent->addend == orig_rel.r_addend)
14675 plt = htab->elf.splt;
14676 if (!htab->elf.dynamic_sections_created
14678 || h->elf.dynindx == -1)
14681 ? h->elf.type == STT_GNU_IFUNC
14682 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14683 plt = htab->elf.iplt;
14685 plt = htab->pltlocal;
14687 relocation = (plt->output_section->vma
14688 + plt->output_offset
14689 + ent->plt.offset);
14690 if (r_type == R_PPC64_PLT16_HA
14691 || r_type == R_PPC64_PLT16_HI
14692 || r_type == R_PPC64_PLT16_LO
14693 || r_type == R_PPC64_PLT16_LO_DS)
14695 got = (elf_gp (output_bfd)
14696 + htab->sec_info[input_section->id].toc_off);
14700 unresolved_reloc = FALSE;
14708 /* Relocation value is TOC base. */
14709 relocation = TOCstart;
14710 if (r_symndx == STN_UNDEF)
14711 relocation += htab->sec_info[input_section->id].toc_off;
14712 else if (unresolved_reloc)
14714 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14715 relocation += htab->sec_info[sec->id].toc_off;
14717 unresolved_reloc = TRUE;
14720 /* TOC16 relocs. We want the offset relative to the TOC base,
14721 which is the address of the start of the TOC plus 0x8000.
14722 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14724 case R_PPC64_TOC16:
14725 case R_PPC64_TOC16_LO:
14726 case R_PPC64_TOC16_HI:
14727 case R_PPC64_TOC16_DS:
14728 case R_PPC64_TOC16_LO_DS:
14729 case R_PPC64_TOC16_HA:
14730 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14733 /* Relocate against the beginning of the section. */
14734 case R_PPC64_SECTOFF:
14735 case R_PPC64_SECTOFF_LO:
14736 case R_PPC64_SECTOFF_HI:
14737 case R_PPC64_SECTOFF_DS:
14738 case R_PPC64_SECTOFF_LO_DS:
14739 case R_PPC64_SECTOFF_HA:
14741 addend -= sec->output_section->vma;
14744 case R_PPC64_REL16:
14745 case R_PPC64_REL16_LO:
14746 case R_PPC64_REL16_HI:
14747 case R_PPC64_REL16_HA:
14748 case R_PPC64_REL16_HIGH:
14749 case R_PPC64_REL16_HIGHA:
14750 case R_PPC64_REL16_HIGHER:
14751 case R_PPC64_REL16_HIGHERA:
14752 case R_PPC64_REL16_HIGHEST:
14753 case R_PPC64_REL16_HIGHESTA:
14754 case R_PPC64_REL16DX_HA:
14757 case R_PPC64_REL14:
14758 case R_PPC64_REL14_BRNTAKEN:
14759 case R_PPC64_REL14_BRTAKEN:
14760 case R_PPC64_REL24:
14761 case R_PPC64_REL24_NOTOC:
14764 case R_PPC64_TPREL16:
14765 case R_PPC64_TPREL16_LO:
14766 case R_PPC64_TPREL16_HI:
14767 case R_PPC64_TPREL16_HA:
14768 case R_PPC64_TPREL16_DS:
14769 case R_PPC64_TPREL16_LO_DS:
14770 case R_PPC64_TPREL16_HIGH:
14771 case R_PPC64_TPREL16_HIGHA:
14772 case R_PPC64_TPREL16_HIGHER:
14773 case R_PPC64_TPREL16_HIGHERA:
14774 case R_PPC64_TPREL16_HIGHEST:
14775 case R_PPC64_TPREL16_HIGHESTA:
14777 && h->elf.root.type == bfd_link_hash_undefweak
14778 && h->elf.dynindx == -1)
14780 /* Make this relocation against an undefined weak symbol
14781 resolve to zero. This is really just a tweak, since
14782 code using weak externs ought to check that they are
14783 defined before using them. */
14784 bfd_byte *p = contents + rel->r_offset - d_offset;
14786 insn = bfd_get_32 (input_bfd, p);
14787 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14789 bfd_put_32 (input_bfd, insn, p);
14792 if (htab->elf.tls_sec != NULL)
14793 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14794 /* The TPREL16 relocs shouldn't really be used in shared
14795 libs or with non-local symbols as that will result in
14796 DT_TEXTREL being set, but support them anyway. */
14799 case R_PPC64_DTPREL16:
14800 case R_PPC64_DTPREL16_LO:
14801 case R_PPC64_DTPREL16_HI:
14802 case R_PPC64_DTPREL16_HA:
14803 case R_PPC64_DTPREL16_DS:
14804 case R_PPC64_DTPREL16_LO_DS:
14805 case R_PPC64_DTPREL16_HIGH:
14806 case R_PPC64_DTPREL16_HIGHA:
14807 case R_PPC64_DTPREL16_HIGHER:
14808 case R_PPC64_DTPREL16_HIGHERA:
14809 case R_PPC64_DTPREL16_HIGHEST:
14810 case R_PPC64_DTPREL16_HIGHESTA:
14811 if (htab->elf.tls_sec != NULL)
14812 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14815 case R_PPC64_ADDR64_LOCAL:
14816 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14821 case R_PPC64_DTPMOD64:
14826 case R_PPC64_TPREL64:
14827 if (htab->elf.tls_sec != NULL)
14828 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14831 case R_PPC64_DTPREL64:
14832 if (htab->elf.tls_sec != NULL)
14833 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14834 /* Fall through. */
14836 /* Relocations that may need to be propagated if this is a
14838 case R_PPC64_REL30:
14839 case R_PPC64_REL32:
14840 case R_PPC64_REL64:
14841 case R_PPC64_ADDR14:
14842 case R_PPC64_ADDR14_BRNTAKEN:
14843 case R_PPC64_ADDR14_BRTAKEN:
14844 case R_PPC64_ADDR16:
14845 case R_PPC64_ADDR16_DS:
14846 case R_PPC64_ADDR16_HA:
14847 case R_PPC64_ADDR16_HI:
14848 case R_PPC64_ADDR16_HIGH:
14849 case R_PPC64_ADDR16_HIGHA:
14850 case R_PPC64_ADDR16_HIGHER:
14851 case R_PPC64_ADDR16_HIGHERA:
14852 case R_PPC64_ADDR16_HIGHEST:
14853 case R_PPC64_ADDR16_HIGHESTA:
14854 case R_PPC64_ADDR16_LO:
14855 case R_PPC64_ADDR16_LO_DS:
14856 case R_PPC64_ADDR24:
14857 case R_PPC64_ADDR32:
14858 case R_PPC64_ADDR64:
14859 case R_PPC64_UADDR16:
14860 case R_PPC64_UADDR32:
14861 case R_PPC64_UADDR64:
14863 if ((input_section->flags & SEC_ALLOC) == 0)
14866 if (NO_OPD_RELOCS && is_opd)
14869 if (bfd_link_pic (info)
14871 || h->dyn_relocs != NULL)
14872 && ((h != NULL && pc_dynrelocs (h))
14873 || must_be_dyn_reloc (info, r_type)))
14875 ? h->dyn_relocs != NULL
14876 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14878 bfd_boolean skip, relocate;
14883 /* When generating a dynamic object, these relocations
14884 are copied into the output file to be resolved at run
14890 out_off = _bfd_elf_section_offset (output_bfd, info,
14891 input_section, rel->r_offset);
14892 if (out_off == (bfd_vma) -1)
14894 else if (out_off == (bfd_vma) -2)
14895 skip = TRUE, relocate = TRUE;
14896 out_off += (input_section->output_section->vma
14897 + input_section->output_offset);
14898 outrel.r_offset = out_off;
14899 outrel.r_addend = rel->r_addend;
14901 /* Optimize unaligned reloc use. */
14902 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14903 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14904 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14905 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14906 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14907 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14908 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14909 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14910 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14913 memset (&outrel, 0, sizeof outrel);
14914 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14916 && r_type != R_PPC64_TOC)
14918 indx = h->elf.dynindx;
14919 BFD_ASSERT (indx != -1);
14920 outrel.r_info = ELF64_R_INFO (indx, r_type);
14924 /* This symbol is local, or marked to become local,
14925 or this is an opd section reloc which must point
14926 at a local function. */
14927 outrel.r_addend += relocation;
14928 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14930 if (is_opd && h != NULL)
14932 /* Lie about opd entries. This case occurs
14933 when building shared libraries and we
14934 reference a function in another shared
14935 lib. The same thing happens for a weak
14936 definition in an application that's
14937 overridden by a strong definition in a
14938 shared lib. (I believe this is a generic
14939 bug in binutils handling of weak syms.)
14940 In these cases we won't use the opd
14941 entry in this lib. */
14942 unresolved_reloc = FALSE;
14945 && r_type == R_PPC64_ADDR64
14947 ? h->elf.type == STT_GNU_IFUNC
14948 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14949 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14952 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14954 /* We need to relocate .opd contents for ld.so.
14955 Prelink also wants simple and consistent rules
14956 for relocs. This make all RELATIVE relocs have
14957 *r_offset equal to r_addend. */
14964 ? h->elf.type == STT_GNU_IFUNC
14965 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14967 info->callbacks->einfo
14968 /* xgettext:c-format */
14969 (_("%H: %s for indirect "
14970 "function `%pT' unsupported\n"),
14971 input_bfd, input_section, rel->r_offset,
14972 ppc64_elf_howto_table[r_type]->name,
14976 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14978 else if (sec == NULL || sec->owner == NULL)
14980 bfd_set_error (bfd_error_bad_value);
14987 osec = sec->output_section;
14988 indx = elf_section_data (osec)->dynindx;
14992 if ((osec->flags & SEC_READONLY) == 0
14993 && htab->elf.data_index_section != NULL)
14994 osec = htab->elf.data_index_section;
14996 osec = htab->elf.text_index_section;
14997 indx = elf_section_data (osec)->dynindx;
14999 BFD_ASSERT (indx != 0);
15001 /* We are turning this relocation into one
15002 against a section symbol, so subtract out
15003 the output section's address but not the
15004 offset of the input section in the output
15006 outrel.r_addend -= osec->vma;
15009 outrel.r_info = ELF64_R_INFO (indx, r_type);
15013 sreloc = elf_section_data (input_section)->sreloc;
15015 ? h->elf.type == STT_GNU_IFUNC
15016 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
15018 sreloc = htab->elf.irelplt;
15020 htab->local_ifunc_resolver = 1;
15021 else if (is_static_defined (&h->elf))
15022 htab->maybe_local_ifunc_resolver = 1;
15024 if (sreloc == NULL)
15027 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15030 loc = sreloc->contents;
15031 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15032 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15034 /* If this reloc is against an external symbol, it will
15035 be computed at runtime, so there's no need to do
15036 anything now. However, for the sake of prelink ensure
15037 that the section contents are a known value. */
15040 unresolved_reloc = FALSE;
15041 /* The value chosen here is quite arbitrary as ld.so
15042 ignores section contents except for the special
15043 case of .opd where the contents might be accessed
15044 before relocation. Choose zero, as that won't
15045 cause reloc overflow. */
15048 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15049 to improve backward compatibility with older
15051 if (r_type == R_PPC64_ADDR64)
15052 addend = outrel.r_addend;
15053 /* Adjust pc_relative relocs to have zero in *r_offset. */
15054 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15055 addend = outrel.r_offset;
15061 case R_PPC64_GLOB_DAT:
15062 case R_PPC64_JMP_SLOT:
15063 case R_PPC64_JMP_IREL:
15064 case R_PPC64_RELATIVE:
15065 /* We shouldn't ever see these dynamic relocs in relocatable
15067 /* Fall through. */
15069 case R_PPC64_PLTGOT16:
15070 case R_PPC64_PLTGOT16_DS:
15071 case R_PPC64_PLTGOT16_HA:
15072 case R_PPC64_PLTGOT16_HI:
15073 case R_PPC64_PLTGOT16_LO:
15074 case R_PPC64_PLTGOT16_LO_DS:
15075 case R_PPC64_PLTREL32:
15076 case R_PPC64_PLTREL64:
15077 /* These ones haven't been implemented yet. */
15079 info->callbacks->einfo
15080 /* xgettext:c-format */
15081 (_("%P: %pB: %s is not supported for `%pT'\n"),
15083 ppc64_elf_howto_table[r_type]->name, sym_name);
15085 bfd_set_error (bfd_error_invalid_operation);
15090 /* Multi-instruction sequences that access the TOC can be
15091 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15092 to nop; addi rb,r2,x; */
15098 case R_PPC64_GOT_TLSLD16_HI:
15099 case R_PPC64_GOT_TLSGD16_HI:
15100 case R_PPC64_GOT_TPREL16_HI:
15101 case R_PPC64_GOT_DTPREL16_HI:
15102 case R_PPC64_GOT16_HI:
15103 case R_PPC64_TOC16_HI:
15104 /* These relocs would only be useful if building up an
15105 offset to later add to r2, perhaps in an indexed
15106 addressing mode instruction. Don't try to optimize.
15107 Unfortunately, the possibility of someone building up an
15108 offset like this or even with the HA relocs, means that
15109 we need to check the high insn when optimizing the low
15113 case R_PPC64_PLTCALL:
15114 if (unresolved_reloc)
15116 /* No plt entry. Make this into a direct call. */
15117 bfd_byte *p = contents + rel->r_offset;
15118 insn = bfd_get_32 (input_bfd, p);
15120 bfd_put_32 (input_bfd, B_DOT | insn, p);
15121 bfd_put_32 (input_bfd, NOP, p + 4);
15122 unresolved_reloc = save_unresolved_reloc;
15123 r_type = R_PPC64_REL24;
15127 case R_PPC64_PLTSEQ:
15128 if (unresolved_reloc)
15130 unresolved_reloc = FALSE;
15135 case R_PPC64_PLT16_HA:
15136 if (unresolved_reloc)
15138 unresolved_reloc = FALSE;
15141 /* Fall through. */
15142 case R_PPC64_GOT_TLSLD16_HA:
15143 case R_PPC64_GOT_TLSGD16_HA:
15144 case R_PPC64_GOT_TPREL16_HA:
15145 case R_PPC64_GOT_DTPREL16_HA:
15146 case R_PPC64_GOT16_HA:
15147 case R_PPC64_TOC16_HA:
15148 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15149 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15153 p = contents + (rel->r_offset & ~3);
15154 bfd_put_32 (input_bfd, NOP, p);
15159 case R_PPC64_PLT16_LO:
15160 case R_PPC64_PLT16_LO_DS:
15161 if (unresolved_reloc)
15163 unresolved_reloc = FALSE;
15166 /* Fall through. */
15167 case R_PPC64_GOT_TLSLD16_LO:
15168 case R_PPC64_GOT_TLSGD16_LO:
15169 case R_PPC64_GOT_TPREL16_LO_DS:
15170 case R_PPC64_GOT_DTPREL16_LO_DS:
15171 case R_PPC64_GOT16_LO:
15172 case R_PPC64_GOT16_LO_DS:
15173 case R_PPC64_TOC16_LO:
15174 case R_PPC64_TOC16_LO_DS:
15175 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15176 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15178 bfd_byte *p = contents + (rel->r_offset & ~3);
15179 insn = bfd_get_32 (input_bfd, p);
15180 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15182 /* Transform addic to addi when we change reg. */
15183 insn &= ~((0x3f << 26) | (0x1f << 16));
15184 insn |= (14u << 26) | (2 << 16);
15188 insn &= ~(0x1f << 16);
15191 bfd_put_32 (input_bfd, insn, p);
15195 case R_PPC64_TPREL16_HA:
15196 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15198 bfd_byte *p = contents + (rel->r_offset & ~3);
15199 insn = bfd_get_32 (input_bfd, p);
15200 if ((insn & ((0x3f << 26) | 0x1f << 16))
15201 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15202 /* xgettext:c-format */
15203 info->callbacks->minfo
15204 (_("%H: warning: %s unexpected insn %#x.\n"),
15205 input_bfd, input_section, rel->r_offset,
15206 ppc64_elf_howto_table[r_type]->name, insn);
15209 bfd_put_32 (input_bfd, NOP, p);
15215 case R_PPC64_TPREL16_LO:
15216 case R_PPC64_TPREL16_LO_DS:
15217 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15219 bfd_byte *p = contents + (rel->r_offset & ~3);
15220 insn = bfd_get_32 (input_bfd, p);
15221 insn &= ~(0x1f << 16);
15223 bfd_put_32 (input_bfd, insn, p);
15228 /* Do any further special processing. */
15234 case R_PPC64_REL16_HA:
15235 case R_PPC64_REL16_HIGHA:
15236 case R_PPC64_REL16_HIGHERA:
15237 case R_PPC64_REL16_HIGHESTA:
15238 case R_PPC64_REL16DX_HA:
15239 case R_PPC64_ADDR16_HA:
15240 case R_PPC64_ADDR16_HIGHA:
15241 case R_PPC64_ADDR16_HIGHERA:
15242 case R_PPC64_ADDR16_HIGHESTA:
15243 case R_PPC64_TOC16_HA:
15244 case R_PPC64_SECTOFF_HA:
15245 case R_PPC64_TPREL16_HA:
15246 case R_PPC64_TPREL16_HIGHA:
15247 case R_PPC64_TPREL16_HIGHERA:
15248 case R_PPC64_TPREL16_HIGHESTA:
15249 case R_PPC64_DTPREL16_HA:
15250 case R_PPC64_DTPREL16_HIGHA:
15251 case R_PPC64_DTPREL16_HIGHERA:
15252 case R_PPC64_DTPREL16_HIGHESTA:
15253 /* It's just possible that this symbol is a weak symbol
15254 that's not actually defined anywhere. In that case,
15255 'sec' would be NULL, and we should leave the symbol
15256 alone (it will be set to zero elsewhere in the link). */
15259 /* Fall through. */
15261 case R_PPC64_GOT16_HA:
15262 case R_PPC64_PLTGOT16_HA:
15263 case R_PPC64_PLT16_HA:
15264 case R_PPC64_GOT_TLSGD16_HA:
15265 case R_PPC64_GOT_TLSLD16_HA:
15266 case R_PPC64_GOT_TPREL16_HA:
15267 case R_PPC64_GOT_DTPREL16_HA:
15268 /* Add 0x10000 if sign bit in 0:15 is set.
15269 Bits 0:15 are not used. */
15273 case R_PPC64_ADDR16_DS:
15274 case R_PPC64_ADDR16_LO_DS:
15275 case R_PPC64_GOT16_DS:
15276 case R_PPC64_GOT16_LO_DS:
15277 case R_PPC64_PLT16_LO_DS:
15278 case R_PPC64_SECTOFF_DS:
15279 case R_PPC64_SECTOFF_LO_DS:
15280 case R_PPC64_TOC16_DS:
15281 case R_PPC64_TOC16_LO_DS:
15282 case R_PPC64_PLTGOT16_DS:
15283 case R_PPC64_PLTGOT16_LO_DS:
15284 case R_PPC64_GOT_TPREL16_DS:
15285 case R_PPC64_GOT_TPREL16_LO_DS:
15286 case R_PPC64_GOT_DTPREL16_DS:
15287 case R_PPC64_GOT_DTPREL16_LO_DS:
15288 case R_PPC64_TPREL16_DS:
15289 case R_PPC64_TPREL16_LO_DS:
15290 case R_PPC64_DTPREL16_DS:
15291 case R_PPC64_DTPREL16_LO_DS:
15292 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15294 /* If this reloc is against an lq, lxv, or stxv insn, then
15295 the value must be a multiple of 16. This is somewhat of
15296 a hack, but the "correct" way to do this by defining _DQ
15297 forms of all the _DS relocs bloats all reloc switches in
15298 this file. It doesn't make much sense to use these
15299 relocs in data, so testing the insn should be safe. */
15300 if ((insn & (0x3f << 26)) == (56u << 26)
15301 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15303 relocation += addend;
15304 addend = insn & (mask ^ 3);
15305 if ((relocation & mask) != 0)
15307 relocation ^= relocation & mask;
15308 info->callbacks->einfo
15309 /* xgettext:c-format */
15310 (_("%H: error: %s not a multiple of %u\n"),
15311 input_bfd, input_section, rel->r_offset,
15312 ppc64_elf_howto_table[r_type]->name,
15314 bfd_set_error (bfd_error_bad_value);
15321 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15322 because such sections are not SEC_ALLOC and thus ld.so will
15323 not process them. */
15324 howto = ppc64_elf_howto_table[(int) r_type];
15325 if (unresolved_reloc
15326 && !((input_section->flags & SEC_DEBUGGING) != 0
15327 && h->elf.def_dynamic)
15328 && _bfd_elf_section_offset (output_bfd, info, input_section,
15329 rel->r_offset) != (bfd_vma) -1)
15331 info->callbacks->einfo
15332 /* xgettext:c-format */
15333 (_("%H: unresolvable %s against `%pT'\n"),
15334 input_bfd, input_section, rel->r_offset,
15336 h->elf.root.root.string);
15340 /* 16-bit fields in insns mostly have signed values, but a
15341 few insns have 16-bit unsigned values. Really, we should
15342 have different reloc types. */
15343 if (howto->complain_on_overflow != complain_overflow_dont
15344 && howto->dst_mask == 0xffff
15345 && (input_section->flags & SEC_CODE) != 0)
15347 enum complain_overflow complain = complain_overflow_signed;
15349 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15350 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15351 complain = complain_overflow_bitfield;
15352 else if (howto->rightshift == 0
15353 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15354 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15355 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15356 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15357 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15358 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15359 complain = complain_overflow_unsigned;
15360 if (howto->complain_on_overflow != complain)
15362 alt_howto = *howto;
15363 alt_howto.complain_on_overflow = complain;
15364 howto = &alt_howto;
15368 if (r_type == R_PPC64_REL16DX_HA)
15370 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15371 if (rel->r_offset + 4 > input_section->size)
15372 r = bfd_reloc_outofrange;
15375 relocation += addend;
15376 relocation -= (rel->r_offset
15377 + input_section->output_offset
15378 + input_section->output_section->vma);
15379 relocation = (bfd_signed_vma) relocation >> 16;
15380 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15382 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15383 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15385 if (relocation + 0x8000 > 0xffff)
15386 r = bfd_reloc_overflow;
15390 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15391 rel->r_offset, relocation, addend);
15393 if (r != bfd_reloc_ok)
15395 char *more_info = NULL;
15396 const char *reloc_name = howto->name;
15398 if (reloc_dest != DEST_NORMAL)
15400 more_info = bfd_malloc (strlen (reloc_name) + 8);
15401 if (more_info != NULL)
15403 strcpy (more_info, reloc_name);
15404 strcat (more_info, (reloc_dest == DEST_OPD
15405 ? " (OPD)" : " (stub)"));
15406 reloc_name = more_info;
15410 if (r == bfd_reloc_overflow)
15412 /* On code like "if (foo) foo();" don't report overflow
15413 on a branch to zero when foo is undefined. */
15415 && (reloc_dest == DEST_STUB
15417 && (h->elf.root.type == bfd_link_hash_undefweak
15418 || h->elf.root.type == bfd_link_hash_undefined)
15419 && is_branch_reloc (r_type))))
15420 info->callbacks->reloc_overflow (info, &h->elf.root,
15421 sym_name, reloc_name,
15423 input_bfd, input_section,
15428 info->callbacks->einfo
15429 /* xgettext:c-format */
15430 (_("%H: %s against `%pT': error %d\n"),
15431 input_bfd, input_section, rel->r_offset,
15432 reloc_name, sym_name, (int) r);
15435 if (more_info != NULL)
15445 Elf_Internal_Shdr *rel_hdr;
15446 size_t deleted = rel - wrel;
15448 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15449 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15450 if (rel_hdr->sh_size == 0)
15452 /* It is too late to remove an empty reloc section. Leave
15454 ??? What is wrong with an empty section??? */
15455 rel_hdr->sh_size = rel_hdr->sh_entsize;
15458 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15459 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15460 input_section->reloc_count -= deleted;
15463 /* If we're emitting relocations, then shortly after this function
15464 returns, reloc offsets and addends for this section will be
15465 adjusted. Worse, reloc symbol indices will be for the output
15466 file rather than the input. Save a copy of the relocs for
15467 opd_entry_value. */
15468 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15471 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15472 rel = bfd_alloc (input_bfd, amt);
15473 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15474 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15477 memcpy (rel, relocs, amt);
15482 /* Adjust the value of any local symbols in opd sections. */
15485 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15486 const char *name ATTRIBUTE_UNUSED,
15487 Elf_Internal_Sym *elfsym,
15488 asection *input_sec,
15489 struct elf_link_hash_entry *h)
15491 struct _opd_sec_data *opd;
15498 opd = get_opd_info (input_sec);
15499 if (opd == NULL || opd->adjust == NULL)
15502 value = elfsym->st_value - input_sec->output_offset;
15503 if (!bfd_link_relocatable (info))
15504 value -= input_sec->output_section->vma;
15506 adjust = opd->adjust[OPD_NDX (value)];
15510 elfsym->st_value += adjust;
15514 /* Finish up dynamic symbol handling. We set the contents of various
15515 dynamic sections here. */
15518 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15519 struct bfd_link_info *info,
15520 struct elf_link_hash_entry *h,
15521 Elf_Internal_Sym *sym)
15523 struct ppc_link_hash_table *htab;
15524 struct plt_entry *ent;
15526 htab = ppc_hash_table (info);
15530 if (!htab->opd_abi && !h->def_regular)
15531 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15532 if (ent->plt.offset != (bfd_vma) -1)
15534 /* Mark the symbol as undefined, rather than as
15535 defined in glink. Leave the value if there were
15536 any relocations where pointer equality matters
15537 (this is a clue for the dynamic linker, to make
15538 function pointer comparisons work between an
15539 application and shared library), otherwise set it
15541 sym->st_shndx = SHN_UNDEF;
15542 if (!h->pointer_equality_needed)
15544 else if (!h->ref_regular_nonweak)
15546 /* This breaks function pointer comparisons, but
15547 that is better than breaking tests for a NULL
15548 function pointer. */
15556 /* This symbol needs a copy reloc. Set it up. */
15557 Elf_Internal_Rela rela;
15561 if (h->dynindx == -1
15562 || (h->root.type != bfd_link_hash_defined
15563 && h->root.type != bfd_link_hash_defweak)
15564 || htab->elf.srelbss == NULL
15565 || htab->elf.sreldynrelro == NULL)
15568 rela.r_offset = (h->root.u.def.value
15569 + h->root.u.def.section->output_section->vma
15570 + h->root.u.def.section->output_offset);
15571 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15573 if (h->root.u.def.section == htab->elf.sdynrelro)
15574 srel = htab->elf.sreldynrelro;
15576 srel = htab->elf.srelbss;
15577 loc = srel->contents;
15578 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15579 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15585 /* Used to decide how to sort relocs in an optimal manner for the
15586 dynamic linker, before writing them out. */
15588 static enum elf_reloc_type_class
15589 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15590 const asection *rel_sec,
15591 const Elf_Internal_Rela *rela)
15593 enum elf_ppc64_reloc_type r_type;
15594 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15596 if (rel_sec == htab->elf.irelplt)
15597 return reloc_class_ifunc;
15599 r_type = ELF64_R_TYPE (rela->r_info);
15602 case R_PPC64_RELATIVE:
15603 return reloc_class_relative;
15604 case R_PPC64_JMP_SLOT:
15605 return reloc_class_plt;
15607 return reloc_class_copy;
15609 return reloc_class_normal;
15613 /* Finish up the dynamic sections. */
15616 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15617 struct bfd_link_info *info)
15619 struct ppc_link_hash_table *htab;
15623 htab = ppc_hash_table (info);
15627 dynobj = htab->elf.dynobj;
15628 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15630 if (htab->elf.dynamic_sections_created)
15632 Elf64_External_Dyn *dyncon, *dynconend;
15634 if (sdyn == NULL || htab->elf.sgot == NULL)
15637 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15638 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15639 for (; dyncon < dynconend; dyncon++)
15641 Elf_Internal_Dyn dyn;
15644 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15651 case DT_PPC64_GLINK:
15653 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15654 /* We stupidly defined DT_PPC64_GLINK to be the start
15655 of glink rather than the first entry point, which is
15656 what ld.so needs, and now have a bigger stub to
15657 support automatic multiple TOCs. */
15658 dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4;
15662 s = bfd_get_section_by_name (output_bfd, ".opd");
15665 dyn.d_un.d_ptr = s->vma;
15669 if (htab->do_multi_toc && htab->multi_toc_needed)
15670 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15671 if (htab->has_plt_localentry0)
15672 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15675 case DT_PPC64_OPDSZ:
15676 s = bfd_get_section_by_name (output_bfd, ".opd");
15679 dyn.d_un.d_val = s->size;
15683 s = htab->elf.splt;
15684 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15688 s = htab->elf.srelplt;
15689 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15693 dyn.d_un.d_val = htab->elf.srelplt->size;
15697 if (htab->local_ifunc_resolver)
15698 info->callbacks->einfo
15699 (_("%X%P: text relocations and GNU indirect "
15700 "functions will result in a segfault at runtime\n"));
15701 else if (htab->maybe_local_ifunc_resolver)
15702 info->callbacks->einfo
15703 (_("%P: warning: text relocations and GNU indirect "
15704 "functions may result in a segfault at runtime\n"));
15708 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15712 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15713 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15715 /* Fill in the first entry in the global offset table.
15716 We use it to hold the link-time TOCbase. */
15717 bfd_put_64 (output_bfd,
15718 elf_gp (output_bfd) + TOC_BASE_OFF,
15719 htab->elf.sgot->contents);
15721 /* Set .got entry size. */
15722 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
15726 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15727 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15729 /* Set .plt entry size. */
15730 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15731 = PLT_ENTRY_SIZE (htab);
15734 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15735 brlt ourselves if emitrelocations. */
15736 if (htab->brlt != NULL
15737 && htab->brlt->reloc_count != 0
15738 && !_bfd_elf_link_output_relocs (output_bfd,
15740 elf_section_data (htab->brlt)->rela.hdr,
15741 elf_section_data (htab->brlt)->relocs,
15745 if (htab->glink != NULL
15746 && htab->glink->reloc_count != 0
15747 && !_bfd_elf_link_output_relocs (output_bfd,
15749 elf_section_data (htab->glink)->rela.hdr,
15750 elf_section_data (htab->glink)->relocs,
15755 if (htab->glink_eh_frame != NULL
15756 && htab->glink_eh_frame->size != 0
15757 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15758 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15759 htab->glink_eh_frame,
15760 htab->glink_eh_frame->contents))
15763 /* We need to handle writing out multiple GOT sections ourselves,
15764 since we didn't add them to DYNOBJ. We know dynobj is the first
15766 while ((dynobj = dynobj->link.next) != NULL)
15770 if (!is_ppc64_elf (dynobj))
15773 s = ppc64_elf_tdata (dynobj)->got;
15776 && s->output_section != bfd_abs_section_ptr
15777 && !bfd_set_section_contents (output_bfd, s->output_section,
15778 s->contents, s->output_offset,
15781 s = ppc64_elf_tdata (dynobj)->relgot;
15784 && s->output_section != bfd_abs_section_ptr
15785 && !bfd_set_section_contents (output_bfd, s->output_section,
15786 s->contents, s->output_offset,
15794 #include "elf64-target.h"
15796 /* FreeBSD support */
15798 #undef TARGET_LITTLE_SYM
15799 #undef TARGET_LITTLE_NAME
15801 #undef TARGET_BIG_SYM
15802 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15803 #undef TARGET_BIG_NAME
15804 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15807 #define ELF_OSABI ELFOSABI_FREEBSD
15810 #define elf64_bed elf64_powerpc_fbsd_bed
15812 #include "elf64-target.h"