1 /* SPARC-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
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.
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
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
26 #include "elf/sparc.h"
27 #include "opcode/sparc.h"
28 #include "elfxx-sparc.h"
29 #include "elf-vxworks.h"
31 /* Support for core dump NOTE sections. */
34 elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
41 case 260: /* Solaris prpsinfo_t. */
42 elf_tdata (abfd)->core->program
43 = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16);
44 elf_tdata (abfd)->core->command
45 = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80);
48 case 336: /* Solaris psinfo_t. */
49 elf_tdata (abfd)->core->program
50 = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16);
51 elf_tdata (abfd)->core->command
52 = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80);
59 /* Functions for dealing with the e_flags field.
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. */
66 /* Merge backend specific data from an object file to the output
67 object file when linking. */
70 elf32_sparc_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
72 bfd *obfd = info->output_bfd;
74 unsigned long ibfd_mach;
75 /* FIXME: This should not be static. */
76 static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
78 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
79 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
84 ibfd_mach = bfd_get_mach (ibfd);
85 if (bfd_mach_sparc_64bit_p (ibfd_mach))
89 (_("%B: compiled for a 64 bit system and target is 32 bit"), ibfd);
91 else if ((ibfd->flags & DYNAMIC) == 0)
93 if (bfd_get_mach (obfd) < ibfd_mach)
94 bfd_set_arch_mach (obfd, bfd_arch_sparc, ibfd_mach);
97 if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
98 != previous_ibfd_e_flags)
99 && previous_ibfd_e_flags != (unsigned long) -1)
102 (_("%B: linking little endian files with big endian files"), ibfd);
105 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
109 bfd_set_error (bfd_error_bad_value);
113 return _bfd_sparc_elf_merge_private_bfd_data (ibfd, info);
116 /* The final processing done just before writing out the object file.
117 We need to set the e_machine field appropriately. */
120 elf32_sparc_final_write_processing (bfd *abfd,
121 bfd_boolean linker ATTRIBUTE_UNUSED)
123 switch (bfd_get_mach (abfd))
125 case bfd_mach_sparc :
126 case bfd_mach_sparc_sparclet :
127 case bfd_mach_sparc_sparclite :
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;
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;
139 case bfd_mach_sparc_v8plusb :
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 :
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
150 case bfd_mach_sparc_sparclite_le :
151 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
159 static enum elf_reloc_type_class
160 elf32_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)
164 switch ((int) ELF32_R_TYPE (rela->r_info))
166 case R_SPARC_RELATIVE:
167 return reloc_class_relative;
168 case R_SPARC_JMP_SLOT:
169 return reloc_class_plt;
171 return reloc_class_copy;
173 return reloc_class_normal;
177 /* Hook called by the linker routine which adds symbols from an object
181 elf32_sparc_add_symbol_hook (bfd * abfd,
182 struct bfd_link_info * info,
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)
189 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
190 && (abfd->flags & DYNAMIC) == 0
191 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
192 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
196 #define TARGET_BIG_SYM sparc_elf32_vec
197 #define TARGET_BIG_NAME "elf32-sparc"
198 #define ELF_ARCH bfd_arch_sparc
199 #define ELF_TARGET_ID SPARC_ELF_DATA
200 #define ELF_MACHINE_CODE EM_SPARC
201 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
202 #define ELF_MAXPAGESIZE 0x10000
203 #define ELF_COMMONPAGESIZE 0x2000
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
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
214 #define bfd_elf32_bfd_reloc_name_lookup \
215 _bfd_sparc_elf_reloc_name_lookup
216 #define bfd_elf32_bfd_link_hash_table_create \
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
220 #define elf_backend_copy_indirect_symbol \
221 _bfd_sparc_elf_copy_indirect_symbol
222 #define elf_backend_create_dynamic_sections \
223 _bfd_sparc_elf_create_dynamic_sections
224 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
225 #define elf_backend_adjust_dynamic_symbol \
226 _bfd_sparc_elf_adjust_dynamic_symbol
227 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
228 #define elf_backend_size_dynamic_sections \
229 _bfd_sparc_elf_size_dynamic_sections
230 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
231 #define elf_backend_finish_dynamic_symbol \
232 _bfd_sparc_elf_finish_dynamic_symbol
233 #define elf_backend_finish_dynamic_sections \
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
240 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
242 #define elf_backend_can_gc_sections 1
243 #define elf_backend_can_refcount 1
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
248 #define elf_backend_want_dynrelro 1
249 #define elf_backend_rela_normal 1
251 #define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook
253 #include "elf32-target.h"
257 #undef TARGET_BIG_SYM
258 #define TARGET_BIG_SYM sparc_elf32_sol2_vec
259 #undef TARGET_BIG_NAME
260 #define TARGET_BIG_NAME "elf32-sparc-sol2"
263 #define elf32_bed elf32_sparc_sol2_bed
265 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
267 #undef elf_backend_static_tls_alignment
268 #define elf_backend_static_tls_alignment 8
270 #undef elf_backend_strtab_flags
271 #define elf_backend_strtab_flags SHF_STRINGS
274 elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
275 bfd *obfd ATTRIBUTE_UNUSED,
276 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
277 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
279 /* PR 19938: FIXME: Need to add code for setting the sh_info
280 and sh_link fields of Solaris specific section types. */
284 #undef elf_backend_copy_special_section_fields
285 #define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields
287 #include "elf32-target.h"
289 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
290 the target system as VxWorks. */
292 static struct bfd_link_hash_table *
293 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
295 struct bfd_link_hash_table *ret;
297 ret = _bfd_sparc_elf_link_hash_table_create (abfd);
300 struct _bfd_sparc_elf_link_hash_table *htab;
302 htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
303 htab->is_vxworks = 1;
308 /* A final_write_processing hook that does both the SPARC- and VxWorks-
309 specific handling. */
312 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
314 elf32_sparc_final_write_processing (abfd, linker);
315 elf_vxworks_final_write_processing (abfd, linker);
318 #undef TARGET_BIG_SYM
319 #define TARGET_BIG_SYM sparc_elf32_vxworks_vec
320 #undef TARGET_BIG_NAME
321 #define TARGET_BIG_NAME "elf32-sparc-vxworks"
323 #undef ELF_MINPAGESIZE
324 #define ELF_MINPAGESIZE 0x1000
326 #undef bfd_elf32_bfd_link_hash_table_create
327 #define bfd_elf32_bfd_link_hash_table_create \
328 elf32_sparc_vxworks_link_hash_table_create
330 #undef elf_backend_want_got_plt
331 #define elf_backend_want_got_plt 1
332 #undef elf_backend_plt_readonly
333 #define elf_backend_plt_readonly 1
334 #undef elf_backend_got_header_size
335 #define elf_backend_got_header_size 12
336 #undef elf_backend_dtrel_excludes_plt
337 #define elf_backend_dtrel_excludes_plt 1
338 #undef elf_backend_add_symbol_hook
339 #define elf_backend_add_symbol_hook \
340 elf_vxworks_add_symbol_hook
341 #undef elf_backend_link_output_symbol_hook
342 #define elf_backend_link_output_symbol_hook \
343 elf_vxworks_link_output_symbol_hook
344 #undef elf_backend_emit_relocs
345 #define elf_backend_emit_relocs \
346 elf_vxworks_emit_relocs
347 #undef elf_backend_final_write_processing
348 #define elf_backend_final_write_processing \
349 elf32_sparc_vxworks_final_write_processing
350 #undef elf_backend_static_tls_alignment
351 #undef elf_backend_strtab_flags
352 #undef elf_backend_copy_special_section_fields
355 #define elf32_bed sparc_elf_vxworks_bed
357 #include "elf32-target.h"