Delete duplicate target short-cuts to dynamic sections
[deliverable/binutils-gdb.git] / bfd / elf32-sparc.c
CommitLineData
252b5132 1/* SPARC-specific support for 32-bit ELF
6f2750fe 2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
252b5132 3
ae9a127f 4 This file is part of BFD, the Binary File Descriptor library.
252b5132 5
ae9a127f
NC
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
ae9a127f 9 (at your option) any later version.
252b5132 10
ae9a127f
NC
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
252b5132 15
ae9a127f
NC
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
cd123cb7
NC
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
252b5132 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
252b5132
RH
23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26#include "elf/sparc.h"
f7775d95 27#include "opcode/sparc.h"
22b75d0a 28#include "elfxx-sparc.h"
910600e9 29#include "elf-vxworks.h"
252b5132 30
22b75d0a 31/* Support for core dump NOTE sections. */
252b5132 32
b34976b6 33static bfd_boolean
22b75d0a 34elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
252b5132 35{
22b75d0a 36 switch (note->descsz)
252b5132 37 {
22b75d0a
DM
38 default:
39 return FALSE;
252b5132 40
22b75d0a 41 case 260: /* Solaris prpsinfo_t. */
228e534f 42 elf_tdata (abfd)->core->program
22b75d0a 43 = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16);
228e534f 44 elf_tdata (abfd)->core->command
22b75d0a
DM
45 = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80);
46 break;
252b5132 47
22b75d0a 48 case 336: /* Solaris psinfo_t. */
228e534f 49 elf_tdata (abfd)->core->program
22b75d0a 50 = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16);
228e534f 51 elf_tdata (abfd)->core->command
22b75d0a
DM
52 = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80);
53 break;
252b5132
RH
54 }
55
b34976b6 56 return TRUE;
252b5132
RH
57}
58
252b5132
RH
59/* Functions for dealing with the e_flags field.
60
61 We don't define set_private_flags or copy_private_bfd_data because
62 the only currently defined values are based on the bfd mach number,
63 so we use the latter instead and defer setting e_flags until the
64 file is written out. */
65
66/* Merge backend specific data from an object file to the output
67 object file when linking. */
68
b34976b6 69static bfd_boolean
50e03d47 70elf32_sparc_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
252b5132 71{
50e03d47 72 bfd *obfd = info->output_bfd;
b34976b6 73 bfd_boolean error;
7946e94a 74 unsigned long ibfd_mach;
5f771d47
ILT
75 /* FIXME: This should not be static. */
76 static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
252b5132
RH
77
78 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
79 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 80 return TRUE;
252b5132 81
b34976b6 82 error = FALSE;
252b5132 83
7946e94a
JJ
84 ibfd_mach = bfd_get_mach (ibfd);
85 if (bfd_mach_sparc_64bit_p (ibfd_mach))
252b5132 86 {
b34976b6 87 error = TRUE;
4eca0228 88 _bfd_error_handler
d003868e 89 (_("%B: compiled for a 64 bit system and target is 32 bit"), ibfd);
252b5132 90 }
37fb6db1
ILT
91 else if ((ibfd->flags & DYNAMIC) == 0)
92 {
7946e94a
JJ
93 if (bfd_get_mach (obfd) < ibfd_mach)
94 bfd_set_arch_mach (obfd, bfd_arch_sparc, ibfd_mach);
37fb6db1 95 }
252b5132
RH
96
97 if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
98 != previous_ibfd_e_flags)
5f771d47 99 && previous_ibfd_e_flags != (unsigned long) -1)
252b5132 100 {
4eca0228 101 _bfd_error_handler
d003868e 102 (_("%B: linking little endian files with big endian files"), ibfd);
b34976b6 103 error = TRUE;
252b5132
RH
104 }
105 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
106
107 if (error)
108 {
109 bfd_set_error (bfd_error_bad_value);
b34976b6 110 return FALSE;
252b5132
RH
111 }
112
50e03d47 113 return _bfd_sparc_elf_merge_private_bfd_data (ibfd, info);
252b5132 114}
252b5132
RH
115
116/* The final processing done just before writing out the object file.
117 We need to set the e_machine field appropriately. */
118
119static void
22b75d0a
DM
120elf32_sparc_final_write_processing (bfd *abfd,
121 bfd_boolean linker ATTRIBUTE_UNUSED)
252b5132
RH
122{
123 switch (bfd_get_mach (abfd))
124 {
125 case bfd_mach_sparc :
fca870e4
AM
126 case bfd_mach_sparc_sparclet :
127 case bfd_mach_sparc_sparclite :
252b5132
RH
128 break; /* nothing to do */
129 case bfd_mach_sparc_v8plus :
130 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
131 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
132 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
133 break;
134 case bfd_mach_sparc_v8plusa :
135 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
136 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
137 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
138 break;
19f7b010 139 case bfd_mach_sparc_v8plusb :
4f26fb3a
JM
140 case bfd_mach_sparc_v8plusc :
141 case bfd_mach_sparc_v8plusd :
142 case bfd_mach_sparc_v8pluse :
143 case bfd_mach_sparc_v8plusv :
144 case bfd_mach_sparc_v8plusm :
19f7b010
JJ
145 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
146 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
147 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1
148 | EF_SPARC_SUN_US3;
149 break;
252b5132 150 case bfd_mach_sparc_sparclite_le :
252b5132
RH
151 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
152 break;
153 default :
154 abort ();
155 break;
156 }
157}
db6751f2
JJ
158
159static enum elf_reloc_type_class
7e612e98
AM
160elf32_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
161 const asection *rel_sec ATTRIBUTE_UNUSED,
162 const Elf_Internal_Rela *rela)
db6751f2 163{
f51e552e 164 switch ((int) ELF32_R_TYPE (rela->r_info))
db6751f2
JJ
165 {
166 case R_SPARC_RELATIVE:
167 return reloc_class_relative;
168 case R_SPARC_JMP_SLOT:
169 return reloc_class_plt;
170 case R_SPARC_COPY:
171 return reloc_class_copy;
172 default:
173 return reloc_class_normal;
174 }
175}
4c45e5c9 176
d0c9aeb3
DM
177/* Hook called by the linker routine which adds symbols from an object
178 file. */
179
180static bfd_boolean
c16153ae 181elf32_sparc_add_symbol_hook (bfd * abfd,
f1885d1e 182 struct bfd_link_info * info,
d0c9aeb3
DM
183 Elf_Internal_Sym * sym,
184 const char ** namep ATTRIBUTE_UNUSED,
185 flagword * flagsp ATTRIBUTE_UNUSED,
186 asection ** secp ATTRIBUTE_UNUSED,
187 bfd_vma * valp ATTRIBUTE_UNUSED)
188{
a43942db 189 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
f1885d1e
AM
190 && (abfd->flags & DYNAMIC) == 0
191 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
a43942db 192 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
d0c9aeb3
DM
193 return TRUE;
194}
195
6d00b590 196#define TARGET_BIG_SYM sparc_elf32_vec
252b5132
RH
197#define TARGET_BIG_NAME "elf32-sparc"
198#define ELF_ARCH bfd_arch_sparc
ae95ffa6 199#define ELF_TARGET_ID SPARC_ELF_DATA
252b5132
RH
200#define ELF_MACHINE_CODE EM_SPARC
201#define ELF_MACHINE_ALT1 EM_SPARC32PLUS
202#define ELF_MAXPAGESIZE 0x10000
24718e3b 203#define ELF_COMMONPAGESIZE 0x2000
252b5132 204
22b75d0a
DM
205#define bfd_elf32_bfd_merge_private_bfd_data \
206 elf32_sparc_merge_private_bfd_data
207#define elf_backend_final_write_processing \
208 elf32_sparc_final_write_processing
209#define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
210#define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
211
212#define elf_info_to_howto _bfd_sparc_elf_info_to_howto
213#define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
157090f7
AM
214#define bfd_elf32_bfd_reloc_name_lookup \
215 _bfd_sparc_elf_reloc_name_lookup
b9734f35 216#define bfd_elf32_bfd_link_hash_table_create \
22b75d0a
DM
217 _bfd_sparc_elf_link_hash_table_create
218#define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
219#define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
b9734f35 220#define elf_backend_copy_indirect_symbol \
22b75d0a 221 _bfd_sparc_elf_copy_indirect_symbol
252b5132 222#define elf_backend_create_dynamic_sections \
22b75d0a
DM
223 _bfd_sparc_elf_create_dynamic_sections
224#define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
252b5132 225#define elf_backend_adjust_dynamic_symbol \
22b75d0a
DM
226 _bfd_sparc_elf_adjust_dynamic_symbol
227#define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
252b5132 228#define elf_backend_size_dynamic_sections \
22b75d0a
DM
229 _bfd_sparc_elf_size_dynamic_sections
230#define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
252b5132 231#define elf_backend_finish_dynamic_symbol \
22b75d0a 232 _bfd_sparc_elf_finish_dynamic_symbol
252b5132 233#define elf_backend_finish_dynamic_sections \
22b75d0a
DM
234 _bfd_sparc_elf_finish_dynamic_sections
235#define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
236#define elf_backend_object_p _bfd_sparc_elf_object_p
237#define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
238#define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook
239#define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
74541ad4 240#define elf_backend_init_index_section _bfd_elf_init_1_index_section
252b5132
RH
241
242#define elf_backend_can_gc_sections 1
b9734f35 243#define elf_backend_can_refcount 1
252b5132
RH
244#define elf_backend_want_got_plt 0
245#define elf_backend_plt_readonly 0
246#define elf_backend_want_plt_sym 1
247#define elf_backend_got_header_size 4
f0fe0e16 248#define elf_backend_rela_normal 1
252b5132 249
d0c9aeb3
DM
250#define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook
251
252b5132 252#include "elf32-target.h"
910600e9 253
1360ba76
RO
254/* Solaris 2. */
255
256#undef TARGET_BIG_SYM
6d00b590 257#define TARGET_BIG_SYM sparc_elf32_sol2_vec
1360ba76
RO
258#undef TARGET_BIG_NAME
259#define TARGET_BIG_NAME "elf32-sparc-sol2"
260
261#undef elf32_bed
262#define elf32_bed elf32_sparc_sol2_bed
263
264/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
265 boundary. */
84865015 266#undef elf_backend_static_tls_alignment
1360ba76
RO
267#define elf_backend_static_tls_alignment 8
268
84865015
NC
269#undef elf_backend_strtab_flags
270#define elf_backend_strtab_flags SHF_STRINGS
271
272static bfd_boolean
5522f910
NC
273elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
274 bfd *obfd ATTRIBUTE_UNUSED,
275 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
276 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC
277{
278 /* PR 19938: FIXME: Need to add code for setting the sh_info
279 and sh_link fields of Solaris specific section types. */
280 return FALSE;
281}
282
5522f910
NC
283#undef elf_backend_copy_special_section_fields
284#define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields
84865015 285
1360ba76
RO
286#include "elf32-target.h"
287
910600e9
RS
288/* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
289 the target system as VxWorks. */
290
291static struct bfd_link_hash_table *
292elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
293{
294 struct bfd_link_hash_table *ret;
295
296 ret = _bfd_sparc_elf_link_hash_table_create (abfd);
297 if (ret)
298 {
299 struct _bfd_sparc_elf_link_hash_table *htab;
300
301 htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
302 htab->is_vxworks = 1;
303 }
304 return ret;
305}
306
307/* A final_write_processing hook that does both the SPARC- and VxWorks-
308 specific handling. */
309
310static void
311elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
312{
313 elf32_sparc_final_write_processing (abfd, linker);
314 elf_vxworks_final_write_processing (abfd, linker);
315}
316
84865015 317#undef TARGET_BIG_SYM
6d00b590 318#define TARGET_BIG_SYM sparc_elf32_vxworks_vec
84865015 319#undef TARGET_BIG_NAME
910600e9
RS
320#define TARGET_BIG_NAME "elf32-sparc-vxworks"
321
84865015 322#undef ELF_MINPAGESIZE
910600e9
RS
323#define ELF_MINPAGESIZE 0x1000
324
325#undef bfd_elf32_bfd_link_hash_table_create
326#define bfd_elf32_bfd_link_hash_table_create \
327 elf32_sparc_vxworks_link_hash_table_create
328
84865015 329#undef elf_backend_want_got_plt
910600e9 330#define elf_backend_want_got_plt 1
84865015 331#undef elf_backend_plt_readonly
910600e9 332#define elf_backend_plt_readonly 1
84865015 333#undef elf_backend_got_header_size
910600e9 334#define elf_backend_got_header_size 12
84865015 335#undef elf_backend_add_symbol_hook
910600e9
RS
336#define elf_backend_add_symbol_hook \
337 elf_vxworks_add_symbol_hook
84865015 338#undef elf_backend_link_output_symbol_hook
910600e9
RS
339#define elf_backend_link_output_symbol_hook \
340 elf_vxworks_link_output_symbol_hook
84865015 341#undef elf_backend_emit_relocs
910600e9
RS
342#define elf_backend_emit_relocs \
343 elf_vxworks_emit_relocs
84865015 344#undef elf_backend_final_write_processing
910600e9
RS
345#define elf_backend_final_write_processing \
346 elf32_sparc_vxworks_final_write_processing
84865015
NC
347#undef elf_backend_static_tls_alignment
348#undef elf_backend_strtab_flags
5522f910 349#undef elf_backend_copy_special_section_fields
910600e9 350
84865015 351#undef elf32_bed
910600e9
RS
352#define elf32_bed sparc_elf_vxworks_bed
353
354#include "elf32-target.h"
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