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[binutils.git] / bfd / elf32-sparc.c
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1 /* SPARC-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2010 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/sparc.h"
28 #include "opcode/sparc.h"
29 #include "elfxx-sparc.h"
30 #include "elf-vxworks.h"
32 /* Support for core dump NOTE sections. */
34 static bfd_boolean
35 elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
37 switch (note->descsz)
39 default:
40 return FALSE;
42 case 260: /* Solaris prpsinfo_t. */
43 elf_tdata (abfd)->core_program
44 = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16);
45 elf_tdata (abfd)->core_command
46 = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80);
47 break;
49 case 336: /* Solaris psinfo_t. */
50 elf_tdata (abfd)->core_program
51 = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16);
52 elf_tdata (abfd)->core_command
53 = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80);
54 break;
57 return TRUE;
60 /* Functions for dealing with the e_flags field.
62 We don't define set_private_flags or copy_private_bfd_data because
63 the only currently defined values are based on the bfd mach number,
64 so we use the latter instead and defer setting e_flags until the
65 file is written out. */
67 /* Merge backend specific data from an object file to the output
68 object file when linking. */
70 static bfd_boolean
71 elf32_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
73 bfd_boolean error;
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)
80 return TRUE;
82 error = FALSE;
84 ibfd_mach = bfd_get_mach (ibfd);
85 if (bfd_mach_sparc_64bit_p (ibfd_mach))
87 error = TRUE;
88 (*_bfd_error_handler)
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)
101 (*_bfd_error_handler)
102 (_("%B: linking little endian files with big endian files"), ibfd);
103 error = TRUE;
105 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
107 if (error)
109 bfd_set_error (bfd_error_bad_value);
110 return FALSE;
113 return TRUE;
116 /* The final processing done just before writing out the object file.
117 We need to set the e_machine field appropriately. */
119 static void
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;
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;
139 case bfd_mach_sparc_v8plusb :
140 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
141 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
142 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1
143 | EF_SPARC_SUN_US3;
144 break;
145 case bfd_mach_sparc_sparclite_le :
146 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
147 break;
148 default :
149 abort ();
150 break;
154 static enum elf_reloc_type_class
155 elf32_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
157 switch ((int) ELF32_R_TYPE (rela->r_info))
159 case R_SPARC_RELATIVE:
160 return reloc_class_relative;
161 case R_SPARC_JMP_SLOT:
162 return reloc_class_plt;
163 case R_SPARC_COPY:
164 return reloc_class_copy;
165 default:
166 return reloc_class_normal;
170 /* Hook called by the linker routine which adds symbols from an object
171 file. */
173 static bfd_boolean
174 elf32_sparc_add_symbol_hook (bfd * abfd,
175 struct bfd_link_info * info ATTRIBUTE_UNUSED,
176 Elf_Internal_Sym * sym,
177 const char ** namep ATTRIBUTE_UNUSED,
178 flagword * flagsp ATTRIBUTE_UNUSED,
179 asection ** secp ATTRIBUTE_UNUSED,
180 bfd_vma * valp ATTRIBUTE_UNUSED)
182 if ((abfd->flags & DYNAMIC) == 0
183 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
184 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
185 return TRUE;
188 #define TARGET_BIG_SYM bfd_elf32_sparc_vec
189 #define TARGET_BIG_NAME "elf32-sparc"
190 #define ELF_ARCH bfd_arch_sparc
191 #define ELF_TARGET_ID SPARC_ELF_DATA
192 #define ELF_MACHINE_CODE EM_SPARC
193 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
194 #define ELF_MAXPAGESIZE 0x10000
195 #define ELF_COMMONPAGESIZE 0x2000
197 #define bfd_elf32_bfd_merge_private_bfd_data \
198 elf32_sparc_merge_private_bfd_data
199 #define elf_backend_final_write_processing \
200 elf32_sparc_final_write_processing
201 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
202 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
204 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto
205 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
206 #define bfd_elf32_bfd_reloc_name_lookup \
207 _bfd_sparc_elf_reloc_name_lookup
208 #define bfd_elf32_bfd_link_hash_table_create \
209 _bfd_sparc_elf_link_hash_table_create
210 #define bfd_elf32_bfd_link_hash_table_free \
211 _bfd_sparc_elf_link_hash_table_free
212 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
213 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
214 #define elf_backend_copy_indirect_symbol \
215 _bfd_sparc_elf_copy_indirect_symbol
216 #define elf_backend_create_dynamic_sections \
217 _bfd_sparc_elf_create_dynamic_sections
218 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
219 #define elf_backend_adjust_dynamic_symbol \
220 _bfd_sparc_elf_adjust_dynamic_symbol
221 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
222 #define elf_backend_size_dynamic_sections \
223 _bfd_sparc_elf_size_dynamic_sections
224 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
225 #define elf_backend_finish_dynamic_symbol \
226 _bfd_sparc_elf_finish_dynamic_symbol
227 #define elf_backend_finish_dynamic_sections \
228 _bfd_sparc_elf_finish_dynamic_sections
229 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
230 #define elf_backend_object_p _bfd_sparc_elf_object_p
231 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
232 #define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook
233 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
234 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
236 #define elf_backend_can_gc_sections 1
237 #define elf_backend_can_refcount 1
238 #define elf_backend_want_got_plt 0
239 #define elf_backend_plt_readonly 0
240 #define elf_backend_want_plt_sym 1
241 #define elf_backend_got_header_size 4
242 #define elf_backend_rela_normal 1
244 #define elf_backend_post_process_headers _bfd_elf_set_osabi
245 #define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook
247 #include "elf32-target.h"
249 /* Solaris 2. */
251 #undef TARGET_BIG_SYM
252 #define TARGET_BIG_SYM bfd_elf32_sparc_sol2_vec
253 #undef TARGET_BIG_NAME
254 #define TARGET_BIG_NAME "elf32-sparc-sol2"
256 #undef elf32_bed
257 #define elf32_bed elf32_sparc_sol2_bed
259 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
260 boundary. */
261 #undef elf_backend_static_tls_alignment
262 #define elf_backend_static_tls_alignment 8
264 #include "elf32-target.h"
266 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
267 the target system as VxWorks. */
269 static struct bfd_link_hash_table *
270 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
272 struct bfd_link_hash_table *ret;
274 ret = _bfd_sparc_elf_link_hash_table_create (abfd);
275 if (ret)
277 struct _bfd_sparc_elf_link_hash_table *htab;
279 htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
280 htab->is_vxworks = 1;
282 return ret;
285 /* A final_write_processing hook that does both the SPARC- and VxWorks-
286 specific handling. */
288 static void
289 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
291 elf32_sparc_final_write_processing (abfd, linker);
292 elf_vxworks_final_write_processing (abfd, linker);
295 #undef TARGET_BIG_SYM
296 #define TARGET_BIG_SYM bfd_elf32_sparc_vxworks_vec
297 #undef TARGET_BIG_NAME
298 #define TARGET_BIG_NAME "elf32-sparc-vxworks"
300 #undef ELF_MINPAGESIZE
301 #define ELF_MINPAGESIZE 0x1000
303 #undef bfd_elf32_bfd_link_hash_table_create
304 #define bfd_elf32_bfd_link_hash_table_create \
305 elf32_sparc_vxworks_link_hash_table_create
307 #undef elf_backend_want_got_plt
308 #define elf_backend_want_got_plt 1
309 #undef elf_backend_plt_readonly
310 #define elf_backend_plt_readonly 1
311 #undef elf_backend_got_header_size
312 #define elf_backend_got_header_size 12
313 #undef elf_backend_add_symbol_hook
314 #define elf_backend_add_symbol_hook \
315 elf_vxworks_add_symbol_hook
316 #undef elf_backend_link_output_symbol_hook
317 #define elf_backend_link_output_symbol_hook \
318 elf_vxworks_link_output_symbol_hook
319 #undef elf_backend_emit_relocs
320 #define elf_backend_emit_relocs \
321 elf_vxworks_emit_relocs
322 #undef elf_backend_final_write_processing
323 #define elf_backend_final_write_processing \
324 elf32_sparc_vxworks_final_write_processing
325 #undef elf_backend_static_tls_alignment
327 #undef elf32_bed
328 #define elf32_bed sparc_elf_vxworks_bed
330 #include "elf32-target.h"