1 /* SPARC-specific support for 32-bit ELF
2 Copyright (C) 1993-2019 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 (_("%pB: 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 (_("%pB: 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 sparc_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
122 switch (bfd_get_mach (abfd
))
124 case bfd_mach_sparc
:
125 case bfd_mach_sparc_sparclet
:
126 case bfd_mach_sparc_sparclite
:
127 break; /* nothing to do */
128 case bfd_mach_sparc_v8plus
:
129 elf_elfheader (abfd
)->e_machine
= EM_SPARC32PLUS
;
130 elf_elfheader (abfd
)->e_flags
&=~ EF_SPARC_32PLUS_MASK
;
131 elf_elfheader (abfd
)->e_flags
|= EF_SPARC_32PLUS
;
133 case bfd_mach_sparc_v8plusa
:
134 elf_elfheader (abfd
)->e_machine
= EM_SPARC32PLUS
;
135 elf_elfheader (abfd
)->e_flags
&=~ EF_SPARC_32PLUS_MASK
;
136 elf_elfheader (abfd
)->e_flags
|= EF_SPARC_32PLUS
| EF_SPARC_SUN_US1
;
138 case bfd_mach_sparc_v8plusb
:
139 case bfd_mach_sparc_v8plusc
:
140 case bfd_mach_sparc_v8plusd
:
141 case bfd_mach_sparc_v8pluse
:
142 case bfd_mach_sparc_v8plusv
:
143 case bfd_mach_sparc_v8plusm
:
144 case bfd_mach_sparc_v8plusm8
:
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
;
160 elf32_sparc_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
162 sparc_final_write_processing (abfd
, linker
);
163 _bfd_elf_final_write_processing (abfd
, linker
);
166 /* Used to decide how to sort relocs in an optimal manner for the
167 dynamic linker, before writing them out. */
169 static enum elf_reloc_type_class
170 elf32_sparc_reloc_type_class (const struct bfd_link_info
*info
,
171 const asection
*rel_sec ATTRIBUTE_UNUSED
,
172 const Elf_Internal_Rela
*rela
)
174 bfd
*abfd
= info
->output_bfd
;
175 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
176 struct _bfd_sparc_elf_link_hash_table
*htab
177 = _bfd_sparc_elf_hash_table (info
);
178 BFD_ASSERT (htab
!= NULL
);
180 if (htab
->elf
.dynsym
!= NULL
181 && htab
->elf
.dynsym
->contents
!= NULL
)
183 /* Check relocation against STT_GNU_IFUNC symbol if there are
185 unsigned long r_symndx
= htab
->r_symndx (rela
->r_info
);
186 if (r_symndx
!= STN_UNDEF
)
188 Elf_Internal_Sym sym
;
189 if (!bed
->s
->swap_symbol_in (abfd
,
190 (htab
->elf
.dynsym
->contents
191 + r_symndx
* bed
->s
->sizeof_sym
),
195 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
196 return reloc_class_ifunc
;
200 switch ((int) ELF32_R_TYPE (rela
->r_info
))
202 case R_SPARC_IRELATIVE
:
203 return reloc_class_ifunc
;
204 case R_SPARC_RELATIVE
:
205 return reloc_class_relative
;
206 case R_SPARC_JMP_SLOT
:
207 return reloc_class_plt
;
209 return reloc_class_copy
;
211 return reloc_class_normal
;
215 #define TARGET_BIG_SYM sparc_elf32_vec
216 #define TARGET_BIG_NAME "elf32-sparc"
217 #define ELF_ARCH bfd_arch_sparc
218 #define ELF_TARGET_ID SPARC_ELF_DATA
219 #define ELF_MACHINE_CODE EM_SPARC
220 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
221 #define ELF_MAXPAGESIZE 0x10000
222 #define ELF_COMMONPAGESIZE 0x2000
224 #define bfd_elf32_bfd_merge_private_bfd_data \
225 elf32_sparc_merge_private_bfd_data
226 #define elf_backend_final_write_processing \
227 elf32_sparc_final_write_processing
228 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo
229 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
231 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto
232 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup
233 #define bfd_elf32_bfd_reloc_name_lookup \
234 _bfd_sparc_elf_reloc_name_lookup
235 #define bfd_elf32_bfd_link_hash_table_create \
236 _bfd_sparc_elf_link_hash_table_create
237 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section
238 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook
239 #define elf_backend_copy_indirect_symbol \
240 _bfd_sparc_elf_copy_indirect_symbol
241 #define elf_backend_create_dynamic_sections \
242 _bfd_sparc_elf_create_dynamic_sections
243 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs
244 #define elf_backend_adjust_dynamic_symbol \
245 _bfd_sparc_elf_adjust_dynamic_symbol
246 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym
247 #define elf_backend_size_dynamic_sections \
248 _bfd_sparc_elf_size_dynamic_sections
249 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section
250 #define elf_backend_finish_dynamic_symbol \
251 _bfd_sparc_elf_finish_dynamic_symbol
252 #define elf_backend_finish_dynamic_sections \
253 _bfd_sparc_elf_finish_dynamic_sections
254 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject
255 #define elf_backend_object_p _bfd_sparc_elf_object_p
256 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook
257 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val
258 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
259 #define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol
261 #define elf_backend_can_gc_sections 1
262 #define elf_backend_can_refcount 1
263 #define elf_backend_want_got_plt 0
264 #define elf_backend_plt_readonly 0
265 #define elf_backend_want_plt_sym 1
266 #define elf_backend_got_header_size 4
267 #define elf_backend_want_dynrelro 1
268 #define elf_backend_rela_normal 1
270 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
272 #include "elf32-target.h"
276 #undef TARGET_BIG_SYM
277 #define TARGET_BIG_SYM sparc_elf32_sol2_vec
278 #undef TARGET_BIG_NAME
279 #define TARGET_BIG_NAME "elf32-sparc-sol2"
282 #define elf32_bed elf32_sparc_sol2_bed
284 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
286 #undef elf_backend_static_tls_alignment
287 #define elf_backend_static_tls_alignment 8
289 #undef elf_backend_strtab_flags
290 #define elf_backend_strtab_flags SHF_STRINGS
293 elf32_sparc_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
294 bfd
*obfd ATTRIBUTE_UNUSED
,
295 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
296 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
298 /* PR 19938: FIXME: Need to add code for setting the sh_info
299 and sh_link fields of Solaris specific section types. */
303 #undef elf_backend_copy_special_section_fields
304 #define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields
306 #include "elf32-target.h"
308 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies
309 the target system as VxWorks. */
311 static struct bfd_link_hash_table
*
312 elf32_sparc_vxworks_link_hash_table_create (bfd
*abfd
)
314 struct bfd_link_hash_table
*ret
;
316 ret
= _bfd_sparc_elf_link_hash_table_create (abfd
);
319 struct _bfd_sparc_elf_link_hash_table
*htab
;
321 htab
= (struct _bfd_sparc_elf_link_hash_table
*) ret
;
322 htab
->is_vxworks
= 1;
327 /* A final_write_processing hook that does both the SPARC- and VxWorks-
328 specific handling. */
331 elf32_sparc_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
333 sparc_final_write_processing (abfd
, linker
);
334 elf_vxworks_final_write_processing (abfd
, linker
);
337 #undef TARGET_BIG_SYM
338 #define TARGET_BIG_SYM sparc_elf32_vxworks_vec
339 #undef TARGET_BIG_NAME
340 #define TARGET_BIG_NAME "elf32-sparc-vxworks"
342 #undef ELF_MINPAGESIZE
343 #define ELF_MINPAGESIZE 0x1000
345 #undef bfd_elf32_bfd_link_hash_table_create
346 #define bfd_elf32_bfd_link_hash_table_create \
347 elf32_sparc_vxworks_link_hash_table_create
349 #undef elf_backend_want_got_plt
350 #define elf_backend_want_got_plt 1
351 #undef elf_backend_plt_readonly
352 #define elf_backend_plt_readonly 1
353 #undef elf_backend_got_header_size
354 #define elf_backend_got_header_size 12
355 #undef elf_backend_dtrel_excludes_plt
356 #define elf_backend_dtrel_excludes_plt 1
357 #undef elf_backend_add_symbol_hook
358 #define elf_backend_add_symbol_hook \
359 elf_vxworks_add_symbol_hook
360 #undef elf_backend_link_output_symbol_hook
361 #define elf_backend_link_output_symbol_hook \
362 elf_vxworks_link_output_symbol_hook
363 #undef elf_backend_emit_relocs
364 #define elf_backend_emit_relocs \
365 elf_vxworks_emit_relocs
366 #undef elf_backend_final_write_processing
367 #define elf_backend_final_write_processing \
368 elf32_sparc_vxworks_final_write_processing
369 #undef elf_backend_static_tls_alignment
370 #undef elf_backend_strtab_flags
371 #undef elf_backend_copy_special_section_fields
374 #define elf32_bed sparc_elf_vxworks_bed
376 #include "elf32-target.h"