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252b5132 1/* SPARC-specific support for 32-bit ELF
219d1afa 2 Copyright (C) 1993-2018 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
871b3ab2 89 (_("%pB: 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
871b3ab2 102 (_("%pB: 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 :
64517994 145 case bfd_mach_sparc_v8plusm8 :
19f7b010
JJ
146 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
147 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
148 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1
149 | EF_SPARC_SUN_US3;
150 break;
252b5132 151 case bfd_mach_sparc_sparclite_le :
252b5132
RH
152 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
153 break;
154 default :
155 abort ();
156 break;
157 }
158}
db6751f2
JJ
159
160static enum elf_reloc_type_class
7e612e98
AM
161elf32_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
162 const asection *rel_sec ATTRIBUTE_UNUSED,
163 const Elf_Internal_Rela *rela)
db6751f2 164{
f51e552e 165 switch ((int) ELF32_R_TYPE (rela->r_info))
db6751f2
JJ
166 {
167 case R_SPARC_RELATIVE:
168 return reloc_class_relative;
169 case R_SPARC_JMP_SLOT:
170 return reloc_class_plt;
171 case R_SPARC_COPY:
172 return reloc_class_copy;
173 default:
174 return reloc_class_normal;
175 }
176}
4c45e5c9 177
6d00b590 178#define TARGET_BIG_SYM sparc_elf32_vec
252b5132
RH
179#define TARGET_BIG_NAME "elf32-sparc"
180#define ELF_ARCH bfd_arch_sparc
ae95ffa6 181#define ELF_TARGET_ID SPARC_ELF_DATA
252b5132
RH
182#define ELF_MACHINE_CODE EM_SPARC
183#define ELF_MACHINE_ALT1 EM_SPARC32PLUS
184#define ELF_MAXPAGESIZE 0x10000
24718e3b 185#define ELF_COMMONPAGESIZE 0x2000
252b5132 186
22b75d0a
DM
187#define bfd_elf32_bfd_merge_private_bfd_data \
188 elf32_sparc_merge_private_bfd_data
189#define elf_backend_final_write_processing \
190 elf32_sparc_final_write_processing
191#define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
192#define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
193
194#define elf_info_to_howto _bfd_sparc_elf_info_to_howto
195#define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
157090f7
AM
196#define bfd_elf32_bfd_reloc_name_lookup \
197 _bfd_sparc_elf_reloc_name_lookup
b9734f35 198#define bfd_elf32_bfd_link_hash_table_create \
22b75d0a
DM
199 _bfd_sparc_elf_link_hash_table_create
200#define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
201#define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
b9734f35 202#define elf_backend_copy_indirect_symbol \
22b75d0a 203 _bfd_sparc_elf_copy_indirect_symbol
252b5132 204#define elf_backend_create_dynamic_sections \
22b75d0a
DM
205 _bfd_sparc_elf_create_dynamic_sections
206#define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
252b5132 207#define elf_backend_adjust_dynamic_symbol \
22b75d0a
DM
208 _bfd_sparc_elf_adjust_dynamic_symbol
209#define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
252b5132 210#define elf_backend_size_dynamic_sections \
22b75d0a
DM
211 _bfd_sparc_elf_size_dynamic_sections
212#define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
252b5132 213#define elf_backend_finish_dynamic_symbol \
22b75d0a 214 _bfd_sparc_elf_finish_dynamic_symbol
252b5132 215#define elf_backend_finish_dynamic_sections \
22b75d0a
DM
216 _bfd_sparc_elf_finish_dynamic_sections
217#define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
218#define elf_backend_object_p _bfd_sparc_elf_object_p
219#define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
22b75d0a 220#define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
74541ad4 221#define elf_backend_init_index_section _bfd_elf_init_1_index_section
07d6d2b8 222#define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol
252b5132
RH
223
224#define elf_backend_can_gc_sections 1
b9734f35 225#define elf_backend_can_refcount 1
252b5132
RH
226#define elf_backend_want_got_plt 0
227#define elf_backend_plt_readonly 0
228#define elf_backend_want_plt_sym 1
229#define elf_backend_got_header_size 4
5474d94f 230#define elf_backend_want_dynrelro 1
f0fe0e16 231#define elf_backend_rela_normal 1
252b5132 232
a2f63b2e
MR
233#define elf_backend_linux_prpsinfo32_ugid16 TRUE
234
252b5132 235#include "elf32-target.h"
910600e9 236
1360ba76
RO
237/* Solaris 2. */
238
239#undef TARGET_BIG_SYM
6d00b590 240#define TARGET_BIG_SYM sparc_elf32_sol2_vec
1360ba76
RO
241#undef TARGET_BIG_NAME
242#define TARGET_BIG_NAME "elf32-sparc-sol2"
243
244#undef elf32_bed
245#define elf32_bed elf32_sparc_sol2_bed
246
247/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
248 boundary. */
07d6d2b8 249#undef elf_backend_static_tls_alignment
1360ba76
RO
250#define elf_backend_static_tls_alignment 8
251
07d6d2b8 252#undef elf_backend_strtab_flags
84865015
NC
253#define elf_backend_strtab_flags SHF_STRINGS
254
255static bfd_boolean
5522f910
NC
256elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
257 bfd *obfd ATTRIBUTE_UNUSED,
258 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
259 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC
260{
261 /* PR 19938: FIXME: Need to add code for setting the sh_info
262 and sh_link fields of Solaris specific section types. */
263 return FALSE;
264}
265
5522f910
NC
266#undef elf_backend_copy_special_section_fields
267#define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields
84865015 268
1360ba76
RO
269#include "elf32-target.h"
270
910600e9
RS
271/* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
272 the target system as VxWorks. */
273
274static struct bfd_link_hash_table *
275elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
276{
277 struct bfd_link_hash_table *ret;
278
279 ret = _bfd_sparc_elf_link_hash_table_create (abfd);
280 if (ret)
281 {
282 struct _bfd_sparc_elf_link_hash_table *htab;
283
284 htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
285 htab->is_vxworks = 1;
286 }
287 return ret;
288}
289
290/* A final_write_processing hook that does both the SPARC- and VxWorks-
291 specific handling. */
292
293static void
294elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
295{
296 elf32_sparc_final_write_processing (abfd, linker);
297 elf_vxworks_final_write_processing (abfd, linker);
298}
299
84865015 300#undef TARGET_BIG_SYM
6d00b590 301#define TARGET_BIG_SYM sparc_elf32_vxworks_vec
84865015 302#undef TARGET_BIG_NAME
910600e9
RS
303#define TARGET_BIG_NAME "elf32-sparc-vxworks"
304
84865015 305#undef ELF_MINPAGESIZE
910600e9
RS
306#define ELF_MINPAGESIZE 0x1000
307
308#undef bfd_elf32_bfd_link_hash_table_create
309#define bfd_elf32_bfd_link_hash_table_create \
310 elf32_sparc_vxworks_link_hash_table_create
311
84865015 312#undef elf_backend_want_got_plt
910600e9 313#define elf_backend_want_got_plt 1
84865015 314#undef elf_backend_plt_readonly
910600e9 315#define elf_backend_plt_readonly 1
84865015 316#undef elf_backend_got_header_size
910600e9 317#define elf_backend_got_header_size 12
64f52338
AM
318#undef elf_backend_dtrel_excludes_plt
319#define elf_backend_dtrel_excludes_plt 1
84865015 320#undef elf_backend_add_symbol_hook
910600e9
RS
321#define elf_backend_add_symbol_hook \
322 elf_vxworks_add_symbol_hook
84865015 323#undef elf_backend_link_output_symbol_hook
910600e9
RS
324#define elf_backend_link_output_symbol_hook \
325 elf_vxworks_link_output_symbol_hook
84865015 326#undef elf_backend_emit_relocs
910600e9
RS
327#define elf_backend_emit_relocs \
328 elf_vxworks_emit_relocs
84865015 329#undef elf_backend_final_write_processing
910600e9
RS
330#define elf_backend_final_write_processing \
331 elf32_sparc_vxworks_final_write_processing
84865015
NC
332#undef elf_backend_static_tls_alignment
333#undef elf_backend_strtab_flags
5522f910 334#undef elf_backend_copy_special_section_fields
910600e9 335
84865015 336#undef elf32_bed
910600e9
RS
337#define elf32_bed sparc_elf_vxworks_bed
338
339#include "elf32-target.h"