2009-07-22 H.J. Lu <hongjiu.lu@intel.com>
[binutils.git] / bfd / elf32-sparc.c
blobffe1b97d23f9f6288374a8da6d4569067b7c150e
1 /* SPARC-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2007 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 #define TARGET_BIG_SYM bfd_elf32_sparc_vec
171 #define TARGET_BIG_NAME "elf32-sparc"
172 #define ELF_ARCH bfd_arch_sparc
173 #define ELF_MACHINE_CODE EM_SPARC
174 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
175 #define ELF_MAXPAGESIZE 0x10000
176 #define ELF_COMMONPAGESIZE 0x2000
178 #define bfd_elf32_bfd_merge_private_bfd_data \
179 elf32_sparc_merge_private_bfd_data
180 #define elf_backend_final_write_processing \
181 elf32_sparc_final_write_processing
182 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
183 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
185 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto
186 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
187 #define bfd_elf32_bfd_reloc_name_lookup \
188 _bfd_sparc_elf_reloc_name_lookup
189 #define bfd_elf32_bfd_link_hash_table_create \
190 _bfd_sparc_elf_link_hash_table_create
191 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
192 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
193 #define elf_backend_copy_indirect_symbol \
194 _bfd_sparc_elf_copy_indirect_symbol
195 #define elf_backend_create_dynamic_sections \
196 _bfd_sparc_elf_create_dynamic_sections
197 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
198 #define elf_backend_adjust_dynamic_symbol \
199 _bfd_sparc_elf_adjust_dynamic_symbol
200 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
201 #define elf_backend_size_dynamic_sections \
202 _bfd_sparc_elf_size_dynamic_sections
203 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
204 #define elf_backend_finish_dynamic_symbol \
205 _bfd_sparc_elf_finish_dynamic_symbol
206 #define elf_backend_finish_dynamic_sections \
207 _bfd_sparc_elf_finish_dynamic_sections
208 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
209 #define elf_backend_object_p _bfd_sparc_elf_object_p
210 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
211 #define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook
212 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
213 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
215 #define elf_backend_can_gc_sections 1
216 #define elf_backend_can_refcount 1
217 #define elf_backend_want_got_plt 0
218 #define elf_backend_plt_readonly 0
219 #define elf_backend_want_plt_sym 1
220 #define elf_backend_got_header_size 4
221 #define elf_backend_rela_normal 1
223 #include "elf32-target.h"
225 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
226 the target system as VxWorks. */
228 static struct bfd_link_hash_table *
229 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd)
231 struct bfd_link_hash_table *ret;
233 ret = _bfd_sparc_elf_link_hash_table_create (abfd);
234 if (ret)
236 struct _bfd_sparc_elf_link_hash_table *htab;
238 htab = (struct _bfd_sparc_elf_link_hash_table *) ret;
239 htab->is_vxworks = 1;
241 return ret;
244 /* A final_write_processing hook that does both the SPARC- and VxWorks-
245 specific handling. */
247 static void
248 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
250 elf32_sparc_final_write_processing (abfd, linker);
251 elf_vxworks_final_write_processing (abfd, linker);
254 #undef TARGET_BIG_SYM
255 #define TARGET_BIG_SYM bfd_elf32_sparc_vxworks_vec
256 #undef TARGET_BIG_NAME
257 #define TARGET_BIG_NAME "elf32-sparc-vxworks"
259 #undef ELF_MINPAGESIZE
260 #define ELF_MINPAGESIZE 0x1000
262 #undef bfd_elf32_bfd_link_hash_table_create
263 #define bfd_elf32_bfd_link_hash_table_create \
264 elf32_sparc_vxworks_link_hash_table_create
266 #undef elf_backend_want_got_plt
267 #define elf_backend_want_got_plt 1
268 #undef elf_backend_plt_readonly
269 #define elf_backend_plt_readonly 1
270 #undef elf_backend_got_header_size
271 #define elf_backend_got_header_size 12
272 #undef elf_backend_add_symbol_hook
273 #define elf_backend_add_symbol_hook \
274 elf_vxworks_add_symbol_hook
275 #undef elf_backend_link_output_symbol_hook
276 #define elf_backend_link_output_symbol_hook \
277 elf_vxworks_link_output_symbol_hook
278 #undef elf_backend_emit_relocs
279 #define elf_backend_emit_relocs \
280 elf_vxworks_emit_relocs
281 #undef elf_backend_final_write_processing
282 #define elf_backend_final_write_processing \
283 elf32_sparc_vxworks_final_write_processing
285 #undef elf32_bed
286 #define elf32_bed sparc_elf_vxworks_bed
288 #include "elf32-target.h"