Commit | Line | Data |
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252b5132 | 1 | /* ELF executable support for BFD. |
7898deda | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
73ff0d56 | 3 | 2001, 2002 Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | Written by Fred Fish @ Cygnus Support, from information published | |
6 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
7 | Programming Support Tools". Sufficient support for gdb. | |
8 | ||
9 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
10 | published in "System V Application Binary Interface", chapters 4 | |
11 | and 5, as well as the various "Processor Supplement" documents | |
12 | derived from it. Added support for assembler and other object file | |
13 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
14 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
15 | of Utah) to finish and extend this. | |
16 | ||
17 | This file is part of BFD, the Binary File Descriptor library. | |
18 | ||
19 | This program is free software; you can redistribute it and/or modify | |
20 | it under the terms of the GNU General Public License as published by | |
21 | the Free Software Foundation; either version 2 of the License, or | |
22 | (at your option) any later version. | |
23 | ||
24 | This program is distributed in the hope that it will be useful, | |
25 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | GNU General Public License for more details. | |
28 | ||
29 | You should have received a copy of the GNU General Public License | |
30 | along with this program; if not, write to the Free Software | |
31 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
32 | ||
33 | /* Problems and other issues to resolve. | |
34 | ||
35 | (1) BFD expects there to be some fixed number of "sections" in | |
36 | the object file. I.E. there is a "section_count" variable in the | |
37 | bfd structure which contains the number of sections. However, ELF | |
38 | supports multiple "views" of a file. In particular, with current | |
39 | implementations, executable files typically have two tables, a | |
40 | program header table and a section header table, both of which | |
41 | partition the executable. | |
42 | ||
43 | In ELF-speak, the "linking view" of the file uses the section header | |
44 | table to access "sections" within the file, and the "execution view" | |
45 | uses the program header table to access "segments" within the file. | |
46 | "Segments" typically may contain all the data from one or more | |
47 | "sections". | |
48 | ||
49 | Note that the section header table is optional in ELF executables, | |
50 | but it is this information that is most useful to gdb. If the | |
51 | section header table is missing, then gdb should probably try | |
52 | to make do with the program header table. (FIXME) | |
53 | ||
54 | (2) The code in this file is compiled twice, once in 32-bit mode and | |
55 | once in 64-bit mode. More of it should be made size-independent | |
56 | and moved into elf.c. | |
57 | ||
58 | (3) ELF section symbols are handled rather sloppily now. This should | |
59 | be cleaned up, and ELF section symbols reconciled with BFD section | |
60 | symbols. | |
61 | ||
62 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
63 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
64 | it's cast in stone. | |
65 | */ | |
66 | ||
67 | #include "bfd.h" | |
68 | #include "sysdep.h" | |
210ba1e8 | 69 | #include "libiberty.h" |
252b5132 RH |
70 | #include "bfdlink.h" |
71 | #include "libbfd.h" | |
72 | #include "elf-bfd.h" | |
73 | ||
74 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ | |
75 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) | |
76 | #define Elf_External_Sym NAME(Elf,External_Sym) | |
77 | #define Elf_External_Shdr NAME(Elf,External_Shdr) | |
78 | #define Elf_External_Phdr NAME(Elf,External_Phdr) | |
79 | #define Elf_External_Rel NAME(Elf,External_Rel) | |
80 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
81 | #define Elf_External_Dyn NAME(Elf,External_Dyn) | |
82 | ||
83 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) | |
84 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
85 | #define elf_core_file_matches_executable_p \ | |
86 | NAME(bfd_elf,core_file_matches_executable_p) | |
87 | #define elf_object_p NAME(bfd_elf,object_p) | |
88 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
89 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) | |
90 | #define elf_get_dynamic_symtab_upper_bound \ | |
91 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
92 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) | |
93 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
94 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
95 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
96 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) | |
97 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
98 | #define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in) | |
99 | #define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out) | |
100 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
101 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
102 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
103 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
104 | #define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table) | |
105 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
106 | #define elf_canonicalize_dynamic_symtab \ | |
107 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
108 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
109 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
110 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
111 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
112 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
113 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
114 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
115 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
116 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
117 | #define elf_find_section NAME(bfd_elf,find_section) | |
118 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) | |
119 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) | |
120 | #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr) | |
121 | #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs) | |
b9f66672 JL |
122 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
123 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
124 | #define elf_link_create_dynamic_sections \ |
125 | NAME(bfd_elf,link_create_dynamic_sections) | |
73d074b4 DJ |
126 | #define elf_bfd_discard_info NAME(bfd_elf,discard_info) |
127 | #define elf_reloc_symbol_deleted_p NAME(_bfd_elf,reloc_symbol_deleted_p) | |
252b5132 RH |
128 | #define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
129 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) | |
130 | #define elf_create_pointer_linker_section NAME(bfd_elf,create_pointer_linker_section) | |
131 | #define elf_finish_pointer_linker_section NAME(bfd_elf,finish_pointer_linker_section) | |
132 | #define elf_gc_sections NAME(_bfd_elf,gc_sections) | |
133 | #define elf_gc_common_finalize_got_offsets \ | |
134 | NAME(_bfd_elf,gc_common_finalize_got_offsets) | |
135 | #define elf_gc_common_final_link NAME(_bfd_elf,gc_common_final_link) | |
136 | #define elf_gc_record_vtinherit NAME(_bfd_elf,gc_record_vtinherit) | |
137 | #define elf_gc_record_vtentry NAME(_bfd_elf,gc_record_vtentry) | |
30b30c21 RH |
138 | #define elf_link_record_local_dynamic_symbol \ |
139 | NAME(_bfd_elf,link_record_local_dynamic_symbol) | |
252b5132 RH |
140 | |
141 | #if ARCH_SIZE == 64 | |
142 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
143 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
144 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
145 | #define ELFCLASS ELFCLASS64 | |
146 | #define FILE_ALIGN 8 | |
147 | #define LOG_FILE_ALIGN 3 | |
148 | #endif | |
149 | #if ARCH_SIZE == 32 | |
150 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
151 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
152 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
153 | #define ELFCLASS ELFCLASS32 | |
154 | #define FILE_ALIGN 4 | |
155 | #define LOG_FILE_ALIGN 2 | |
156 | #endif | |
157 | ||
158 | /* Static functions */ | |
159 | ||
160 | static void elf_swap_ehdr_in | |
161 | PARAMS ((bfd *, const Elf_External_Ehdr *, Elf_Internal_Ehdr *)); | |
162 | static void elf_swap_ehdr_out | |
163 | PARAMS ((bfd *, const Elf_Internal_Ehdr *, Elf_External_Ehdr *)); | |
164 | static void elf_swap_shdr_in | |
165 | PARAMS ((bfd *, const Elf_External_Shdr *, Elf_Internal_Shdr *)); | |
166 | static void elf_swap_shdr_out | |
167 | PARAMS ((bfd *, const Elf_Internal_Shdr *, Elf_External_Shdr *)); | |
168 | ||
169 | #define elf_stringtab_init _bfd_elf_stringtab_init | |
170 | ||
171 | #define section_from_elf_index bfd_section_from_elf_index | |
172 | ||
60bcf0fa | 173 | static boolean elf_slurp_reloc_table_from_section |
42fdc509 MM |
174 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, bfd_size_type, |
175 | arelent *, asymbol **, boolean)); | |
252b5132 RH |
176 | |
177 | static boolean elf_file_p PARAMS ((Elf_External_Ehdr *)); | |
178 | ||
179 | #ifdef DEBUG | |
180 | static void elf_debug_section PARAMS ((int, Elf_Internal_Shdr *)); | |
181 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
182 | static char *elf_symbol_flags PARAMS ((flagword)); | |
183 | #endif | |
184 | \f | |
185 | /* Structure swapping routines */ | |
186 | ||
187 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
188 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
189 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
190 | #define H_PUT_WORD H_PUT_64 |
191 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
192 | #define H_GET_WORD H_GET_64 | |
193 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
194 | #endif |
195 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
196 | #define H_PUT_WORD H_PUT_32 |
197 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
198 | #define H_GET_WORD H_GET_32 | |
199 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
200 | #endif |
201 | ||
202 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 203 | format. */ |
252b5132 RH |
204 | |
205 | void | |
73ff0d56 | 206 | elf_swap_symbol_in (abfd, psrc, pshn, dst) |
252b5132 | 207 | bfd *abfd; |
f8ecb12b AM |
208 | const PTR psrc; |
209 | const PTR pshn; | |
252b5132 RH |
210 | Elf_Internal_Sym *dst; |
211 | { | |
73ff0d56 AM |
212 | const Elf_External_Sym *src = (const Elf_External_Sym *) psrc; |
213 | const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn; | |
86dc0f79 RH |
214 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
215 | ||
dc810e39 | 216 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 217 | if (signed_vma) |
dc810e39 | 218 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 219 | else |
dc810e39 AM |
220 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
221 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
222 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
223 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
224 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
9ad5cbcf AM |
225 | if (dst->st_shndx == SHN_XINDEX) |
226 | { | |
227 | if (shndx == NULL) | |
228 | abort (); | |
229 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); | |
230 | } | |
252b5132 RH |
231 | } |
232 | ||
233 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 234 | format. */ |
252b5132 RH |
235 | |
236 | void | |
9ad5cbcf | 237 | elf_swap_symbol_out (abfd, src, cdst, shndx) |
252b5132 RH |
238 | bfd *abfd; |
239 | const Elf_Internal_Sym *src; | |
240 | PTR cdst; | |
9ad5cbcf | 241 | PTR shndx; |
252b5132 | 242 | { |
9ad5cbcf | 243 | unsigned int tmp; |
252b5132 | 244 | Elf_External_Sym *dst = (Elf_External_Sym *) cdst; |
dc810e39 AM |
245 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
246 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
247 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
248 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
249 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf AM |
250 | tmp = src->st_shndx; |
251 | if (tmp > SHN_HIRESERVE) | |
252 | { | |
253 | if (shndx == NULL) | |
254 | abort (); | |
255 | H_PUT_32 (abfd, tmp, shndx); | |
256 | tmp = SHN_XINDEX; | |
257 | } | |
258 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
259 | } |
260 | ||
252b5132 | 261 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 262 | internal format. */ |
252b5132 RH |
263 | |
264 | static void | |
265 | elf_swap_ehdr_in (abfd, src, dst) | |
266 | bfd *abfd; | |
267 | const Elf_External_Ehdr *src; | |
268 | Elf_Internal_Ehdr *dst; | |
269 | { | |
448cafa4 | 270 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 271 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
272 | dst->e_type = H_GET_16 (abfd, src->e_type); |
273 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
274 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 275 | if (signed_vma) |
dc810e39 | 276 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 277 | else |
dc810e39 AM |
278 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
279 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
280 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
281 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
282 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
283 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
284 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
285 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
286 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
287 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
288 | } |
289 | ||
290 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 291 | external format. */ |
252b5132 RH |
292 | |
293 | static void | |
294 | elf_swap_ehdr_out (abfd, src, dst) | |
295 | bfd *abfd; | |
296 | const Elf_Internal_Ehdr *src; | |
297 | Elf_External_Ehdr *dst; | |
298 | { | |
5732c114 | 299 | unsigned int tmp; |
448cafa4 | 300 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 301 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 302 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
303 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
304 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
305 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 306 | if (signed_vma) |
dc810e39 | 307 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 308 | else |
dc810e39 AM |
309 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
310 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
311 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
312 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
313 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
314 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
315 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
316 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 AM |
317 | tmp = src->e_shnum; |
318 | if (tmp >= SHN_LORESERVE) | |
319 | tmp = SHN_UNDEF; | |
320 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
321 | tmp = src->e_shstrndx; | |
322 | if (tmp >= SHN_LORESERVE) | |
323 | tmp = SHN_XINDEX; | |
324 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); | |
252b5132 RH |
325 | } |
326 | ||
252b5132 | 327 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 328 | ELF section header table entry in internal format. */ |
252b5132 RH |
329 | |
330 | static void | |
331 | elf_swap_shdr_in (abfd, src, dst) | |
332 | bfd *abfd; | |
333 | const Elf_External_Shdr *src; | |
334 | Elf_Internal_Shdr *dst; | |
335 | { | |
86dc0f79 RH |
336 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
337 | ||
dc810e39 AM |
338 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
339 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
340 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 341 | if (signed_vma) |
dc810e39 | 342 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 343 | else |
dc810e39 AM |
344 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
345 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
346 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
347 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
348 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
349 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
350 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
351 | dst->bfd_section = NULL; |
352 | dst->contents = NULL; | |
353 | } | |
354 | ||
355 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 356 | ELF section header table entry in external format. */ |
252b5132 RH |
357 | |
358 | static void | |
359 | elf_swap_shdr_out (abfd, src, dst) | |
360 | bfd *abfd; | |
361 | const Elf_Internal_Shdr *src; | |
362 | Elf_External_Shdr *dst; | |
363 | { | |
3e932841 | 364 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
365 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
366 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
367 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
368 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
369 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
370 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
371 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
372 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
373 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
374 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
375 | } |
376 | ||
252b5132 | 377 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 378 | ELF program header table entry in internal format. */ |
252b5132 RH |
379 | |
380 | void | |
381 | elf_swap_phdr_in (abfd, src, dst) | |
382 | bfd *abfd; | |
383 | const Elf_External_Phdr *src; | |
384 | Elf_Internal_Phdr *dst; | |
385 | { | |
86dc0f79 RH |
386 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
387 | ||
dc810e39 AM |
388 | dst->p_type = H_GET_32 (abfd, src->p_type); |
389 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
390 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
391 | if (signed_vma) |
392 | { | |
dc810e39 AM |
393 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
394 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
395 | } |
396 | else | |
397 | { | |
dc810e39 AM |
398 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
399 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 400 | } |
dc810e39 AM |
401 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
402 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
403 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
404 | } |
405 | ||
406 | void | |
407 | elf_swap_phdr_out (abfd, src, dst) | |
408 | bfd *abfd; | |
409 | const Elf_Internal_Phdr *src; | |
410 | Elf_External_Phdr *dst; | |
411 | { | |
3e932841 | 412 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
413 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
414 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
415 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
416 | H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr); | |
417 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); | |
418 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
419 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
420 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
421 | } |
422 | ||
3e932841 | 423 | /* Translate an ELF reloc from external format to internal format. */ |
252b5132 RH |
424 | INLINE void |
425 | elf_swap_reloc_in (abfd, src, dst) | |
426 | bfd *abfd; | |
427 | const Elf_External_Rel *src; | |
428 | Elf_Internal_Rel *dst; | |
429 | { | |
dc810e39 AM |
430 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
431 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
252b5132 RH |
432 | } |
433 | ||
434 | INLINE void | |
435 | elf_swap_reloca_in (abfd, src, dst) | |
436 | bfd *abfd; | |
437 | const Elf_External_Rela *src; | |
438 | Elf_Internal_Rela *dst; | |
439 | { | |
dc810e39 AM |
440 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
441 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
442 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
443 | } |
444 | ||
3e932841 | 445 | /* Translate an ELF reloc from internal format to external format. */ |
252b5132 RH |
446 | INLINE void |
447 | elf_swap_reloc_out (abfd, src, dst) | |
448 | bfd *abfd; | |
449 | const Elf_Internal_Rel *src; | |
450 | Elf_External_Rel *dst; | |
451 | { | |
dc810e39 AM |
452 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
453 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
454 | } |
455 | ||
456 | INLINE void | |
457 | elf_swap_reloca_out (abfd, src, dst) | |
458 | bfd *abfd; | |
459 | const Elf_Internal_Rela *src; | |
460 | Elf_External_Rela *dst; | |
461 | { | |
dc810e39 AM |
462 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
463 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
464 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
465 | } |
466 | ||
467 | INLINE void | |
468 | elf_swap_dyn_in (abfd, p, dst) | |
469 | bfd *abfd; | |
470 | const PTR p; | |
471 | Elf_Internal_Dyn *dst; | |
472 | { | |
473 | const Elf_External_Dyn *src = (const Elf_External_Dyn *) p; | |
474 | ||
dc810e39 AM |
475 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
476 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
477 | } |
478 | ||
479 | INLINE void | |
c7ac6ff8 | 480 | elf_swap_dyn_out (abfd, src, p) |
252b5132 RH |
481 | bfd *abfd; |
482 | const Elf_Internal_Dyn *src; | |
c7ac6ff8 | 483 | PTR p; |
252b5132 | 484 | { |
c7ac6ff8 MM |
485 | Elf_External_Dyn *dst = (Elf_External_Dyn *) p; |
486 | ||
dc810e39 AM |
487 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
488 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
489 | } |
490 | \f | |
491 | /* ELF .o/exec file reading */ | |
492 | ||
252b5132 RH |
493 | /* Begin processing a given object. |
494 | ||
495 | First we validate the file by reading in the ELF header and checking | |
496 | the magic number. */ | |
497 | ||
498 | static INLINE boolean | |
499 | elf_file_p (x_ehdrp) | |
500 | Elf_External_Ehdr *x_ehdrp; | |
501 | { | |
502 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
503 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
504 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
505 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
506 | } | |
507 | ||
508 | /* Check to see if the file associated with ABFD matches the target vector | |
509 | that ABFD points to. | |
510 | ||
511 | Note that we may be called several times with the same ABFD, but different | |
512 | target vectors, most of which will not match. We have to avoid leaving | |
513 | any side effects in ABFD, or any data it points to (like tdata), if the | |
514 | file does not match the target vector. */ | |
515 | ||
516 | const bfd_target * | |
517 | elf_object_p (abfd) | |
518 | bfd *abfd; | |
519 | { | |
520 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
521 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
522 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 523 | Elf_Internal_Shdr i_shdr; |
ed591155 | 524 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 RH |
525 | unsigned int shindex; |
526 | char *shstrtab; /* Internal copy of section header stringtab */ | |
527 | struct elf_backend_data *ebd; | |
ed591155 | 528 | struct bfd_preserve preserve; |
252b5132 | 529 | asection *s; |
dc810e39 | 530 | bfd_size_type amt; |
252b5132 | 531 | |
e84d6fca | 532 | preserve.marker = NULL; |
a17cc40f | 533 | |
252b5132 RH |
534 | /* Read in the ELF header in external format. */ |
535 | ||
dc810e39 AM |
536 | if (bfd_bread ((PTR) & x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd) |
537 | != sizeof (x_ehdr)) | |
252b5132 RH |
538 | { |
539 | if (bfd_get_error () != bfd_error_system_call) | |
540 | goto got_wrong_format_error; | |
541 | else | |
542 | goto got_no_match; | |
543 | } | |
544 | ||
545 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
546 | make use of. The magic number must match, the address size ('class') | |
547 | and byte-swapping must match our XVEC entry, and it must have a | |
548 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 549 | file). */ |
252b5132 | 550 | |
82e51918 AM |
551 | if (! elf_file_p (&x_ehdr) |
552 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
553 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
554 | goto got_wrong_format_error; |
555 | ||
556 | /* Check that file's byte order matches xvec's */ | |
557 | switch (x_ehdr.e_ident[EI_DATA]) | |
558 | { | |
559 | case ELFDATA2MSB: /* Big-endian */ | |
560 | if (! bfd_header_big_endian (abfd)) | |
561 | goto got_wrong_format_error; | |
562 | break; | |
563 | case ELFDATA2LSB: /* Little-endian */ | |
564 | if (! bfd_header_little_endian (abfd)) | |
565 | goto got_wrong_format_error; | |
566 | break; | |
567 | case ELFDATANONE: /* No data encoding specified */ | |
568 | default: /* Unknown data encoding specified */ | |
569 | goto got_wrong_format_error; | |
570 | } | |
571 | ||
572 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to | |
573 | the tdata pointer in the bfd. */ | |
574 | ||
dc810e39 | 575 | amt = sizeof (struct elf_obj_tdata); |
e84d6fca AM |
576 | preserve.marker = bfd_zalloc (abfd, amt); |
577 | if (preserve.marker == NULL) | |
252b5132 | 578 | goto got_no_match; |
e84d6fca | 579 | if (!bfd_preserve_save (abfd, &preserve)) |
ed591155 AM |
580 | goto got_no_match; |
581 | ||
e84d6fca AM |
582 | elf_tdata (abfd) = preserve.marker; |
583 | ||
252b5132 RH |
584 | /* Now that we know the byte order, swap in the rest of the header */ |
585 | i_ehdrp = elf_elfheader (abfd); | |
586 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
587 | #if DEBUG & 1 | |
588 | elf_debug_file (i_ehdrp); | |
589 | #endif | |
590 | ||
591 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
592 | if (i_ehdrp->e_type == ET_CORE) | |
593 | goto got_wrong_format_error; | |
594 | ||
0c35f01a AM |
595 | /* If this is a relocatable file and there is no section header |
596 | table, then we're hosed. */ | |
597 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
598 | goto got_wrong_format_error; |
599 | ||
600 | /* As a simple sanity check, verify that the what BFD thinks is the | |
601 | size of each section header table entry actually matches the size | |
0c35f01a AM |
602 | recorded in the file, but only if there are any sections. */ |
603 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
604 | goto got_wrong_format_error; |
605 | ||
7ece0d85 JJ |
606 | /* Further sanity check. */ |
607 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
608 | goto got_wrong_format_error; | |
609 | ||
252b5132 RH |
610 | ebd = get_elf_backend_data (abfd); |
611 | ||
612 | /* Check that the ELF e_machine field matches what this particular | |
613 | BFD format expects. */ | |
614 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
615 | && (ebd->elf_machine_alt1 == 0 |
616 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
617 | && (ebd->elf_machine_alt2 == 0 | |
618 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 RH |
619 | { |
620 | const bfd_target * const *target_ptr; | |
621 | ||
622 | if (ebd->elf_machine_code != EM_NONE) | |
623 | goto got_wrong_format_error; | |
624 | ||
625 | /* This is the generic ELF target. Let it match any ELF target | |
626 | for which we do not have a specific backend. */ | |
627 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
628 | { | |
629 | struct elf_backend_data *back; | |
630 | ||
631 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
632 | continue; | |
633 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
634 | if (back->elf_machine_code == i_ehdrp->e_machine | |
635 | || (back->elf_machine_alt1 != 0 | |
636 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
637 | || (back->elf_machine_alt2 != 0 | |
638 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
639 | { | |
640 | /* target_ptr is an ELF backend which matches this | |
641 | object file, so reject the generic ELF target. */ | |
642 | goto got_wrong_format_error; | |
643 | } | |
644 | } | |
645 | } | |
646 | ||
647 | if (i_ehdrp->e_type == ET_EXEC) | |
648 | abfd->flags |= EXEC_P; | |
649 | else if (i_ehdrp->e_type == ET_DYN) | |
650 | abfd->flags |= DYNAMIC; | |
651 | ||
652 | if (i_ehdrp->e_phnum > 0) | |
653 | abfd->flags |= D_PAGED; | |
654 | ||
655 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
656 | { | |
657 | /* It's OK if this fails for the generic target. */ | |
658 | if (ebd->elf_machine_code != EM_NONE) | |
659 | goto got_no_match; | |
660 | } | |
661 | ||
3e932841 | 662 | /* Remember the entry point specified in the ELF file header. */ |
448cafa4 | 663 | bfd_set_start_address (abfd, i_ehdrp->e_entry); |
252b5132 | 664 | |
7ece0d85 JJ |
665 | if (i_ehdrp->e_shoff != 0) |
666 | { | |
667 | /* Seek to the section header table in the file. */ | |
668 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0) | |
669 | goto got_no_match; | |
5732c114 | 670 | |
7ece0d85 JJ |
671 | /* Read the first section header at index 0, and convert to internal |
672 | form. */ | |
673 | if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd) | |
674 | != sizeof (x_shdr)) | |
675 | goto got_no_match; | |
676 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 677 | |
7ece0d85 JJ |
678 | /* If the section count is zero, the actual count is in the first |
679 | section header. */ | |
680 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
681 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
5732c114 | 682 | |
7ece0d85 JJ |
683 | /* And similarly for the string table index. */ |
684 | if (i_ehdrp->e_shstrndx == SHN_XINDEX) | |
685 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
686 | } | |
5732c114 | 687 | |
252b5132 | 688 | /* Allocate space for a copy of the section header table in |
5732c114 | 689 | internal form. */ |
0c35f01a AM |
690 | if (i_ehdrp->e_shnum != 0) |
691 | { | |
5732c114 | 692 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 693 | unsigned int num_sec; |
5732c114 | 694 | |
0c35f01a AM |
695 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
696 | i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt); | |
5732c114 AM |
697 | if (!i_shdrp) |
698 | goto got_no_match; | |
9ad5cbcf AM |
699 | num_sec = i_ehdrp->e_shnum; |
700 | if (num_sec > SHN_LORESERVE) | |
701 | num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
702 | elf_numsections (abfd) = num_sec; | |
703 | amt = sizeof (i_shdrp) * num_sec; | |
0c35f01a | 704 | elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt); |
5732c114 | 705 | if (!elf_elfsections (abfd)) |
0c35f01a | 706 | goto got_no_match; |
5732c114 AM |
707 | |
708 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
709 | shdrp = i_shdrp; | |
710 | shindex = 0; | |
9ad5cbcf | 711 | if (num_sec > SHN_LORESERVE) |
5732c114 AM |
712 | { |
713 | for ( ; shindex < SHN_LORESERVE; shindex++) | |
714 | elf_elfsections (abfd)[shindex] = shdrp++; | |
715 | for ( ; shindex < SHN_HIRESERVE + 1; shindex++) | |
9ad5cbcf | 716 | elf_elfsections (abfd)[shindex] = i_shdrp; |
5732c114 | 717 | } |
9ad5cbcf | 718 | for ( ; shindex < num_sec; shindex++) |
5732c114 | 719 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 720 | |
ed591155 AM |
721 | /* Read in the rest of the section header table and convert it |
722 | to internal form. */ | |
723 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
724 | { | |
725 | if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd) | |
726 | != sizeof (x_shdr)) | |
727 | goto got_no_match; | |
728 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
729 | ||
730 | /* If the section is loaded, but not page aligned, clear | |
731 | D_PAGED. */ | |
732 | if (i_shdrp[shindex].sh_size != 0 | |
733 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
734 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
735 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
736 | % ebd->maxpagesize) | |
737 | != 0)) | |
738 | abfd->flags &= ~D_PAGED; | |
739 | } | |
252b5132 | 740 | } |
ed591155 | 741 | |
7ece0d85 | 742 | if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff) |
252b5132 RH |
743 | { |
744 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) | |
745 | goto got_no_match; | |
746 | } | |
747 | ||
748 | /* Read in the program headers. */ | |
749 | if (i_ehdrp->e_phnum == 0) | |
750 | elf_tdata (abfd)->phdr = NULL; | |
751 | else | |
752 | { | |
753 | Elf_Internal_Phdr *i_phdr; | |
754 | unsigned int i; | |
755 | ||
dc810e39 AM |
756 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
757 | elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt); | |
252b5132 RH |
758 | if (elf_tdata (abfd)->phdr == NULL) |
759 | goto got_no_match; | |
dc810e39 | 760 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
761 | goto got_no_match; |
762 | i_phdr = elf_tdata (abfd)->phdr; | |
763 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
764 | { | |
765 | Elf_External_Phdr x_phdr; | |
766 | ||
dc810e39 | 767 | if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof x_phdr, abfd) |
252b5132 RH |
768 | != sizeof x_phdr) |
769 | goto got_no_match; | |
770 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
771 | } | |
772 | } | |
773 | ||
774 | /* Read in the string table containing the names of the sections. We | |
3e932841 | 775 | will need the base pointer to this table later. */ |
252b5132 RH |
776 | /* We read this inline now, so that we don't have to go through |
777 | bfd_section_from_shdr with it (since this particular strtab is | |
778 | used to find all of the ELF section names.) */ | |
779 | ||
7ece0d85 | 780 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff) |
252b5132 | 781 | { |
9ad5cbcf AM |
782 | unsigned int num_sec; |
783 | ||
0c35f01a AM |
784 | shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
785 | if (!shstrtab) | |
252b5132 | 786 | goto got_no_match; |
0c35f01a AM |
787 | |
788 | /* Once all of the section headers have been read and converted, we | |
789 | can start processing them. Note that the first section header is | |
790 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
791 | num_sec = elf_numsections (abfd); |
792 | for (shindex = 1; shindex < num_sec; shindex++) | |
0c35f01a AM |
793 | { |
794 | if (! bfd_section_from_shdr (abfd, shindex)) | |
795 | goto got_no_match; | |
9ad5cbcf AM |
796 | if (shindex == SHN_LORESERVE - 1) |
797 | shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
0c35f01a | 798 | } |
252b5132 RH |
799 | } |
800 | ||
801 | /* Let the backend double check the format and override global | |
802 | information. */ | |
803 | if (ebd->elf_backend_object_p) | |
804 | { | |
82e51918 | 805 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
806 | goto got_wrong_format_error; |
807 | } | |
808 | ||
809 | /* If we have created any reloc sections that are associated with | |
810 | debugging sections, mark the reloc sections as debugging as well. */ | |
811 | for (s = abfd->sections; s != NULL; s = s->next) | |
812 | { | |
813 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
814 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
815 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
816 | { | |
817 | unsigned long targ_index; | |
818 | asection *targ_sec; | |
819 | ||
820 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
821 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
822 | if (targ_sec != NULL | |
823 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
824 | s->flags |= SEC_DEBUGGING; | |
825 | } | |
826 | } | |
827 | ||
e84d6fca AM |
828 | bfd_preserve_finish (abfd, &preserve); |
829 | return abfd->xvec; | |
252b5132 RH |
830 | |
831 | got_wrong_format_error: | |
a77a9fef HPN |
832 | /* There is way too much undoing of half-known state here. The caller, |
833 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
834 | check match/no-match like it does. We have to rely on that a call to | |
835 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
836 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
837 | For this to work, only elf-data and the mach may be changed by the | |
838 | target-specific elf_backend_object_p function. Note that saving the | |
839 | whole bfd here and restoring it would be even worse; the first thing | |
840 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 841 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 842 | |
252b5132 | 843 | got_no_match: |
e84d6fca AM |
844 | if (preserve.marker != NULL) |
845 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 846 | return NULL; |
252b5132 RH |
847 | } |
848 | \f | |
849 | /* ELF .o/exec file writing */ | |
850 | ||
851 | /* Write out the relocs. */ | |
852 | ||
b9f66672 JL |
853 | void |
854 | elf_write_relocs (abfd, sec, data) | |
252b5132 RH |
855 | bfd *abfd; |
856 | asection *sec; | |
857 | PTR data; | |
858 | { | |
859 | boolean *failedp = (boolean *) data; | |
860 | Elf_Internal_Shdr *rela_hdr; | |
861 | Elf_External_Rela *outbound_relocas; | |
862 | Elf_External_Rel *outbound_relocs; | |
863 | unsigned int idx; | |
bf572ba0 | 864 | int use_rela_p; |
252b5132 RH |
865 | asymbol *last_sym = 0; |
866 | int last_sym_idx = 0; | |
867 | ||
868 | /* If we have already failed, don't do anything. */ | |
869 | if (*failedp) | |
870 | return; | |
871 | ||
872 | if ((sec->flags & SEC_RELOC) == 0) | |
873 | return; | |
874 | ||
875 | /* The linker backend writes the relocs out itself, and sets the | |
876 | reloc_count field to zero to inhibit writing them here. Also, | |
877 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
878 | relocs. */ | |
879 | if (sec->reloc_count == 0) | |
880 | return; | |
881 | ||
882 | rela_hdr = &elf_section_data (sec)->rel_hdr; | |
883 | ||
884 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
885 | rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size); | |
886 | if (rela_hdr->contents == NULL) | |
887 | { | |
888 | *failedp = true; | |
889 | return; | |
890 | } | |
891 | ||
bf572ba0 MM |
892 | /* Figure out whether the relocations are RELA or REL relocations. */ |
893 | if (rela_hdr->sh_type == SHT_RELA) | |
894 | use_rela_p = true; | |
895 | else if (rela_hdr->sh_type == SHT_REL) | |
896 | use_rela_p = false; | |
897 | else | |
898 | /* Every relocation section should be either an SHT_RELA or an | |
899 | SHT_REL section. */ | |
900 | abort (); | |
901 | ||
3e932841 | 902 | /* orelocation has the data, reloc_count has the count... */ |
252b5132 RH |
903 | if (use_rela_p) |
904 | { | |
905 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
906 | ||
907 | for (idx = 0; idx < sec->reloc_count; idx++) | |
908 | { | |
909 | Elf_Internal_Rela dst_rela; | |
910 | Elf_External_Rela *src_rela; | |
911 | arelent *ptr; | |
912 | asymbol *sym; | |
913 | int n; | |
914 | ||
915 | ptr = sec->orelocation[idx]; | |
916 | src_rela = outbound_relocas + idx; | |
917 | ||
918 | /* The address of an ELF reloc is section relative for an object | |
919 | file, and absolute for an executable file or shared library. | |
920 | The address of a BFD reloc is always section relative. */ | |
921 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
922 | dst_rela.r_offset = ptr->address; | |
923 | else | |
924 | dst_rela.r_offset = ptr->address + sec->vma; | |
925 | ||
926 | sym = *ptr->sym_ptr_ptr; | |
927 | if (sym == last_sym) | |
928 | n = last_sym_idx; | |
929 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
930 | n = STN_UNDEF; | |
931 | else | |
932 | { | |
933 | last_sym = sym; | |
934 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
935 | if (n < 0) | |
936 | { | |
937 | *failedp = true; | |
938 | return; | |
939 | } | |
940 | last_sym_idx = n; | |
941 | } | |
942 | ||
943 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL | |
944 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
945 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
946 | { | |
947 | *failedp = true; | |
948 | return; | |
949 | } | |
950 | ||
951 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
952 | ||
953 | dst_rela.r_addend = ptr->addend; | |
954 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
955 | } | |
956 | } | |
957 | else | |
958 | /* REL relocations */ | |
959 | { | |
960 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
961 | ||
962 | for (idx = 0; idx < sec->reloc_count; idx++) | |
963 | { | |
964 | Elf_Internal_Rel dst_rel; | |
965 | Elf_External_Rel *src_rel; | |
966 | arelent *ptr; | |
967 | int n; | |
968 | asymbol *sym; | |
969 | ||
970 | ptr = sec->orelocation[idx]; | |
971 | sym = *ptr->sym_ptr_ptr; | |
972 | src_rel = outbound_relocs + idx; | |
973 | ||
974 | /* The address of an ELF reloc is section relative for an object | |
975 | file, and absolute for an executable file or shared library. | |
976 | The address of a BFD reloc is always section relative. */ | |
977 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
978 | dst_rel.r_offset = ptr->address; | |
979 | else | |
980 | dst_rel.r_offset = ptr->address + sec->vma; | |
981 | ||
982 | if (sym == last_sym) | |
983 | n = last_sym_idx; | |
eeaf533e ILT |
984 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) |
985 | n = STN_UNDEF; | |
252b5132 RH |
986 | else |
987 | { | |
988 | last_sym = sym; | |
989 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
990 | if (n < 0) | |
991 | { | |
992 | *failedp = true; | |
993 | return; | |
994 | } | |
995 | last_sym_idx = n; | |
996 | } | |
997 | ||
2f66722d AM |
998 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
999 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
252b5132 RH |
1000 | && ! _bfd_elf_validate_reloc (abfd, ptr)) |
1001 | { | |
1002 | *failedp = true; | |
1003 | return; | |
1004 | } | |
1005 | ||
1006 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); | |
1007 | ||
1008 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | /* Write out the program headers. */ | |
1014 | ||
1015 | int | |
1016 | elf_write_out_phdrs (abfd, phdr, count) | |
1017 | bfd *abfd; | |
1018 | const Elf_Internal_Phdr *phdr; | |
dc810e39 | 1019 | unsigned int count; |
252b5132 RH |
1020 | { |
1021 | while (count--) | |
1022 | { | |
1023 | Elf_External_Phdr extphdr; | |
1024 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
dc810e39 AM |
1025 | if (bfd_bwrite (&extphdr, (bfd_size_type) sizeof (Elf_External_Phdr), |
1026 | abfd) != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1027 | return -1; |
1028 | phdr++; | |
1029 | } | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | /* Write out the section headers and the ELF file header. */ | |
1034 | ||
1035 | boolean | |
1036 | elf_write_shdrs_and_ehdr (abfd) | |
1037 | bfd *abfd; | |
1038 | { | |
1039 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1040 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1041 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1042 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1043 | unsigned int count; | |
dc810e39 | 1044 | bfd_size_type amt; |
252b5132 RH |
1045 | |
1046 | i_ehdrp = elf_elfheader (abfd); | |
1047 | i_shdrp = elf_elfsections (abfd); | |
1048 | ||
3e932841 | 1049 | /* swap the header before spitting it out... */ |
252b5132 RH |
1050 | |
1051 | #if DEBUG & 1 | |
1052 | elf_debug_file (i_ehdrp); | |
1053 | #endif | |
1054 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1055 | amt = sizeof (x_ehdr); |
252b5132 | 1056 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
dc810e39 | 1057 | || bfd_bwrite ((PTR) & x_ehdr, amt, abfd) != amt) |
252b5132 RH |
1058 | return false; |
1059 | ||
5732c114 AM |
1060 | /* Some fields in the first section header handle overflow of ehdr |
1061 | fields. */ | |
1062 | if (i_ehdrp->e_shnum >= SHN_LORESERVE) | |
1063 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; | |
1064 | if (i_ehdrp->e_shstrndx >= SHN_LORESERVE) | |
1065 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; | |
1066 | ||
3e932841 | 1067 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1068 | amt = i_ehdrp->e_shnum; |
1069 | amt *= sizeof (*x_shdrp); | |
dc810e39 | 1070 | x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt); |
252b5132 RH |
1071 | if (!x_shdrp) |
1072 | return false; | |
1073 | ||
5732c114 | 1074 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1075 | { |
1076 | #if DEBUG & 2 | |
5732c114 | 1077 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1078 | #endif |
5732c114 AM |
1079 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
1080 | ||
1081 | if (count == SHN_LORESERVE - 1) | |
1082 | i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
1083 | } |
1084 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
dc810e39 | 1085 | || bfd_bwrite ((PTR) x_shdrp, amt, abfd) != amt) |
252b5132 RH |
1086 | return false; |
1087 | ||
3e932841 | 1088 | /* need to dump the string table too... */ |
252b5132 RH |
1089 | |
1090 | return true; | |
1091 | } | |
1092 | ||
1093 | long | |
1094 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1095 | bfd *abfd; | |
1096 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
1097 | boolean dynamic; | |
1098 | { | |
1099 | Elf_Internal_Shdr *hdr; | |
1100 | Elf_Internal_Shdr *verhdr; | |
1101 | unsigned long symcount; /* Number of external ELF symbols */ | |
1102 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1103 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1104 | Elf_Internal_Sym *isym; |
1105 | Elf_Internal_Sym *isymend; | |
1106 | Elf_Internal_Sym *isymbuf = NULL; | |
1107 | Elf_External_Versym *xver; | |
1108 | Elf_External_Versym *xverbuf = NULL; | |
1109 | struct elf_backend_data *ebd; | |
dc810e39 | 1110 | bfd_size_type amt; |
252b5132 RH |
1111 | |
1112 | /* Read each raw ELF symbol, converting from external ELF form to | |
1113 | internal ELF form, and then using the information to create a | |
1114 | canonical bfd symbol table entry. | |
1115 | ||
1116 | Note that we allocate the initial bfd canonical symbol buffer | |
1117 | based on a one-to-one mapping of the ELF symbols to canonical | |
1118 | symbols. We actually use all the ELF symbols, so there will be no | |
1119 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1120 | build the caller's pointer vector. */ |
252b5132 RH |
1121 | |
1122 | if (! dynamic) | |
1123 | { | |
1124 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1125 | verhdr = NULL; | |
1126 | } | |
1127 | else | |
1128 | { | |
1129 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1130 | if (elf_dynversym (abfd) == 0) | |
1131 | verhdr = NULL; | |
1132 | else | |
1133 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1134 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1135 | && elf_tdata (abfd)->verdef == NULL) | |
1136 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1137 | && elf_tdata (abfd)->verref == NULL)) | |
1138 | { | |
1139 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1140 | return -1; | |
1141 | } | |
1142 | } | |
1143 | ||
6cdc0ccc | 1144 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1145 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1146 | if (symcount == 0) |
1147 | sym = symbase = NULL; | |
1148 | else | |
1149 | { | |
6cdc0ccc AM |
1150 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1151 | NULL, NULL, NULL); | |
1152 | if (isymbuf == NULL) | |
1153 | return -1; | |
252b5132 | 1154 | |
dc810e39 AM |
1155 | amt = symcount; |
1156 | amt *= sizeof (elf_symbol_type); | |
1157 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt); | |
252b5132 | 1158 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1159 | goto error_return; |
252b5132 RH |
1160 | |
1161 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1162 | if (verhdr != NULL |
1163 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1164 | { | |
1165 | (*_bfd_error_handler) | |
1166 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1167 | abfd->filename, | |
1168 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1169 | symcount); | |
1170 | ||
1171 | /* Slurp in the symbols without the version information, | |
1172 | since that is more helpful than just quitting. */ | |
1173 | verhdr = NULL; | |
1174 | } | |
1175 | ||
1176 | if (verhdr != NULL) | |
1177 | { | |
1178 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1179 | goto error_return; | |
1180 | ||
6cdc0ccc AM |
1181 | xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size); |
1182 | if (xverbuf == NULL && verhdr->sh_size != 0) | |
252b5132 RH |
1183 | goto error_return; |
1184 | ||
6cdc0ccc | 1185 | if (bfd_bread ((PTR) xverbuf, verhdr->sh_size, abfd) |
252b5132 RH |
1186 | != verhdr->sh_size) |
1187 | goto error_return; | |
1188 | } | |
1189 | ||
1190 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1191 | xver = xverbuf; |
1192 | if (xver != NULL) | |
1193 | ++xver; | |
1194 | isymend = isymbuf + symcount; | |
1195 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1196 | { |
6cdc0ccc | 1197 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1198 | sym->symbol.the_bfd = abfd; |
1199 | ||
1200 | sym->symbol.name = bfd_elf_string_from_elf_section (abfd, | |
1201 | hdr->sh_link, | |
6cdc0ccc | 1202 | isym->st_name); |
252b5132 | 1203 | |
6cdc0ccc | 1204 | sym->symbol.value = isym->st_value; |
252b5132 | 1205 | |
6cdc0ccc | 1206 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1207 | { |
1208 | sym->symbol.section = bfd_und_section_ptr; | |
1209 | } | |
6cdc0ccc AM |
1210 | else if (isym->st_shndx < SHN_LORESERVE |
1211 | || isym->st_shndx > SHN_HIRESERVE) | |
252b5132 RH |
1212 | { |
1213 | sym->symbol.section = section_from_elf_index (abfd, | |
6cdc0ccc | 1214 | isym->st_shndx); |
252b5132 RH |
1215 | if (sym->symbol.section == NULL) |
1216 | { | |
1217 | /* This symbol is in a section for which we did not | |
1218 | create a BFD section. Just use bfd_abs_section, | |
1219 | although it is wrong. FIXME. */ | |
1220 | sym->symbol.section = bfd_abs_section_ptr; | |
1221 | } | |
1222 | } | |
6cdc0ccc | 1223 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1224 | { |
1225 | sym->symbol.section = bfd_abs_section_ptr; | |
1226 | } | |
6cdc0ccc | 1227 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1228 | { |
1229 | sym->symbol.section = bfd_com_section_ptr; | |
1230 | /* Elf puts the alignment into the `value' field, and | |
1231 | the size into the `size' field. BFD wants to see the | |
1232 | size in the value field, and doesn't care (at the | |
1233 | moment) about the alignment. */ | |
6cdc0ccc | 1234 | sym->symbol.value = isym->st_size; |
252b5132 | 1235 | } |
252b5132 RH |
1236 | else |
1237 | sym->symbol.section = bfd_abs_section_ptr; | |
1238 | ||
1239 | /* If this is a relocateable file, then the symbol value is | |
1240 | already section relative. */ | |
1241 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1242 | sym->symbol.value -= sym->symbol.section->vma; | |
1243 | ||
6cdc0ccc | 1244 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1245 | { |
1246 | case STB_LOCAL: | |
1247 | sym->symbol.flags |= BSF_LOCAL; | |
1248 | break; | |
1249 | case STB_GLOBAL: | |
6cdc0ccc | 1250 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1251 | sym->symbol.flags |= BSF_GLOBAL; |
1252 | break; | |
1253 | case STB_WEAK: | |
1254 | sym->symbol.flags |= BSF_WEAK; | |
1255 | break; | |
1256 | } | |
1257 | ||
6cdc0ccc | 1258 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1259 | { |
1260 | case STT_SECTION: | |
1261 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1262 | break; | |
1263 | case STT_FILE: | |
1264 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1265 | break; | |
1266 | case STT_FUNC: | |
1267 | sym->symbol.flags |= BSF_FUNCTION; | |
1268 | break; | |
1269 | case STT_OBJECT: | |
1270 | sym->symbol.flags |= BSF_OBJECT; | |
1271 | break; | |
1272 | } | |
1273 | ||
1274 | if (dynamic) | |
1275 | sym->symbol.flags |= BSF_DYNAMIC; | |
1276 | ||
6cdc0ccc | 1277 | if (xver != NULL) |
252b5132 RH |
1278 | { |
1279 | Elf_Internal_Versym iversym; | |
1280 | ||
6cdc0ccc | 1281 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1282 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1283 | xver++; |
252b5132 RH |
1284 | } |
1285 | ||
1286 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1287 | if (ebd->elf_backend_symbol_processing) |
1288 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1289 | } |
1290 | } | |
1291 | ||
1292 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1293 | if (ebd->elf_backend_symbol_table_processing) |
1294 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1295 | |
1296 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1297 | ||
1298 | symcount = sym - symbase; | |
1299 | ||
1300 | /* Fill in the user's symbol pointer vector if needed. */ | |
1301 | if (symptrs) | |
1302 | { | |
1303 | long l = symcount; | |
1304 | ||
1305 | sym = symbase; | |
1306 | while (l-- > 0) | |
1307 | { | |
1308 | *symptrs++ = &sym->symbol; | |
1309 | sym++; | |
1310 | } | |
1311 | *symptrs = 0; /* Final null pointer */ | |
1312 | } | |
1313 | ||
6cdc0ccc AM |
1314 | if (xverbuf != NULL) |
1315 | free (xverbuf); | |
1316 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1317 | free (isymbuf); | |
252b5132 | 1318 | return symcount; |
9ad5cbcf | 1319 | |
252b5132 | 1320 | error_return: |
6cdc0ccc AM |
1321 | if (xverbuf != NULL) |
1322 | free (xverbuf); | |
1323 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1324 | free (isymbuf); | |
252b5132 RH |
1325 | return -1; |
1326 | } | |
1327 | ||
60bcf0fa | 1328 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1329 | them. */ |
252b5132 RH |
1330 | |
1331 | static boolean | |
42fdc509 MM |
1332 | elf_slurp_reloc_table_from_section (abfd, asect, rel_hdr, reloc_count, |
1333 | relents, symbols, dynamic) | |
252b5132 RH |
1334 | bfd *abfd; |
1335 | asection *asect; | |
42fdc509 MM |
1336 | Elf_Internal_Shdr *rel_hdr; |
1337 | bfd_size_type reloc_count; | |
1338 | arelent *relents; | |
252b5132 RH |
1339 | asymbol **symbols; |
1340 | boolean dynamic; | |
1341 | { | |
1342 | struct elf_backend_data * const ebd = get_elf_backend_data (abfd); | |
252b5132 RH |
1343 | PTR allocated = NULL; |
1344 | bfd_byte *native_relocs; | |
252b5132 RH |
1345 | arelent *relent; |
1346 | unsigned int i; | |
1347 | int entsize; | |
5ad8645c | 1348 | unsigned int symcount; |
252b5132 | 1349 | |
dc810e39 | 1350 | allocated = (PTR) bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1351 | if (allocated == NULL) |
1352 | goto error_return; | |
1353 | ||
1354 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1355 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1356 | != rel_hdr->sh_size)) |
1357 | goto error_return; | |
1358 | ||
1359 | native_relocs = (bfd_byte *) allocated; | |
1360 | ||
252b5132 RH |
1361 | entsize = rel_hdr->sh_entsize; |
1362 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1363 | || entsize == sizeof (Elf_External_Rela)); | |
1364 | ||
5ad8645c AM |
1365 | if (dynamic) |
1366 | symcount = bfd_get_dynamic_symcount (abfd); | |
1367 | else | |
1368 | symcount = bfd_get_symcount (abfd); | |
1369 | ||
252b5132 RH |
1370 | for (i = 0, relent = relents; |
1371 | i < reloc_count; | |
1372 | i++, relent++, native_relocs += entsize) | |
1373 | { | |
1374 | Elf_Internal_Rela rela; | |
1375 | Elf_Internal_Rel rel; | |
1376 | ||
1377 | if (entsize == sizeof (Elf_External_Rela)) | |
1378 | elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela); | |
1379 | else | |
1380 | { | |
1381 | elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel); | |
1382 | rela.r_offset = rel.r_offset; | |
1383 | rela.r_info = rel.r_info; | |
1384 | rela.r_addend = 0; | |
1385 | } | |
1386 | ||
1387 | /* The address of an ELF reloc is section relative for an object | |
1388 | file, and absolute for an executable file or shared library. | |
1389 | The address of a normal BFD reloc is always section relative, | |
1390 | and the address of a dynamic reloc is absolute.. */ | |
1391 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1392 | relent->address = rela.r_offset; | |
1393 | else | |
1394 | relent->address = rela.r_offset - asect->vma; | |
1395 | ||
1396 | if (ELF_R_SYM (rela.r_info) == 0) | |
1397 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1398 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1399 | { |
1400 | (*_bfd_error_handler) | |
1401 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1402 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1403 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1404 | } | |
252b5132 RH |
1405 | else |
1406 | { | |
1407 | asymbol **ps, *s; | |
1408 | ||
1409 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; | |
1410 | s = *ps; | |
1411 | ||
1412 | /* Canonicalize ELF section symbols. FIXME: Why? */ | |
1413 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
1414 | relent->sym_ptr_ptr = ps; | |
1415 | else | |
1416 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
1417 | } | |
1418 | ||
1419 | relent->addend = rela.r_addend; | |
1420 | ||
1421 | if (entsize == sizeof (Elf_External_Rela)) | |
1422 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); | |
1423 | else | |
1424 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel); | |
1425 | } | |
1426 | ||
252b5132 RH |
1427 | if (allocated != NULL) |
1428 | free (allocated); | |
1429 | ||
1430 | return true; | |
1431 | ||
1432 | error_return: | |
1433 | if (allocated != NULL) | |
1434 | free (allocated); | |
1435 | return false; | |
1436 | } | |
1437 | ||
42fdc509 MM |
1438 | /* Read in and swap the external relocs. */ |
1439 | ||
b9f66672 | 1440 | boolean |
42fdc509 MM |
1441 | elf_slurp_reloc_table (abfd, asect, symbols, dynamic) |
1442 | bfd *abfd; | |
1443 | asection *asect; | |
1444 | asymbol **symbols; | |
1445 | boolean dynamic; | |
1446 | { | |
1447 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1448 | Elf_Internal_Shdr *rel_hdr; | |
1449 | Elf_Internal_Shdr *rel_hdr2; | |
1450 | bfd_size_type reloc_count; | |
1451 | bfd_size_type reloc_count2; | |
1452 | arelent *relents; | |
dc810e39 | 1453 | bfd_size_type amt; |
42fdc509 MM |
1454 | |
1455 | if (asect->relocation != NULL) | |
1456 | return true; | |
1457 | ||
1458 | if (! dynamic) | |
1459 | { | |
1460 | if ((asect->flags & SEC_RELOC) == 0 | |
1461 | || asect->reloc_count == 0) | |
1462 | return true; | |
1463 | ||
1464 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1465 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1466 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1467 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1468 | |
1469 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1470 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1471 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1472 | ||
1473 | } | |
1474 | else | |
1475 | { | |
57e21bef MM |
1476 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1477 | case because relocations against this section may use the | |
1478 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1479 | in elf.c does not update the RELOC_COUNT. */ | |
42fdc509 MM |
1480 | if (asect->_raw_size == 0) |
1481 | return true; | |
1482 | ||
1483 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1484 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1485 | rel_hdr2 = NULL; |
57e21bef | 1486 | reloc_count2 = 0; |
42fdc509 MM |
1487 | } |
1488 | ||
dc810e39 AM |
1489 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
1490 | relents = (arelent *) bfd_alloc (abfd, amt); | |
42fdc509 MM |
1491 | if (relents == NULL) |
1492 | return false; | |
1493 | ||
1494 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1495 | rel_hdr, reloc_count, | |
1496 | relents, | |
1497 | symbols, dynamic)) | |
1498 | return false; | |
60bcf0fa NC |
1499 | |
1500 | if (rel_hdr2 | |
42fdc509 MM |
1501 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1502 | rel_hdr2, reloc_count2, | |
1503 | relents + reloc_count, | |
1504 | symbols, dynamic)) | |
1505 | return false; | |
1506 | ||
42fdc509 MM |
1507 | asect->relocation = relents; |
1508 | return true; | |
1509 | } | |
1510 | ||
252b5132 RH |
1511 | #ifdef DEBUG |
1512 | static void | |
1513 | elf_debug_section (num, hdr) | |
1514 | int num; | |
1515 | Elf_Internal_Shdr *hdr; | |
1516 | { | |
1517 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1518 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1519 | (long) hdr); | |
1520 | fprintf (stderr, | |
1521 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1522 | (long) hdr->sh_name, | |
1523 | (long) hdr->sh_type, | |
1524 | (long) hdr->sh_flags); | |
1525 | fprintf (stderr, | |
1526 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1527 | (long) hdr->sh_addr, | |
1528 | (long) hdr->sh_offset, | |
1529 | (long) hdr->sh_size); | |
1530 | fprintf (stderr, | |
1531 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1532 | (long) hdr->sh_link, | |
1533 | (long) hdr->sh_info, | |
1534 | (long) hdr->sh_addralign); | |
1535 | fprintf (stderr, "sh_entsize = %ld\n", | |
1536 | (long) hdr->sh_entsize); | |
1537 | fflush (stderr); | |
1538 | } | |
1539 | ||
1540 | static void | |
1541 | elf_debug_file (ehdrp) | |
1542 | Elf_Internal_Ehdr *ehdrp; | |
1543 | { | |
1544 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1545 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1546 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1547 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1548 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1549 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1550 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1551 | } | |
1552 | ||
1553 | static char * | |
1554 | elf_symbol_flags (flags) | |
1555 | flagword flags; | |
1556 | { | |
1557 | static char buffer[1024]; | |
1558 | ||
1559 | buffer[0] = '\0'; | |
1560 | if (flags & BSF_LOCAL) | |
1561 | strcat (buffer, " local"); | |
1562 | ||
1563 | if (flags & BSF_GLOBAL) | |
1564 | strcat (buffer, " global"); | |
1565 | ||
1566 | if (flags & BSF_DEBUGGING) | |
1567 | strcat (buffer, " debug"); | |
1568 | ||
1569 | if (flags & BSF_FUNCTION) | |
1570 | strcat (buffer, " function"); | |
1571 | ||
1572 | if (flags & BSF_KEEP) | |
1573 | strcat (buffer, " keep"); | |
1574 | ||
1575 | if (flags & BSF_KEEP_G) | |
1576 | strcat (buffer, " keep_g"); | |
1577 | ||
1578 | if (flags & BSF_WEAK) | |
1579 | strcat (buffer, " weak"); | |
1580 | ||
1581 | if (flags & BSF_SECTION_SYM) | |
1582 | strcat (buffer, " section-sym"); | |
1583 | ||
1584 | if (flags & BSF_OLD_COMMON) | |
1585 | strcat (buffer, " old-common"); | |
1586 | ||
1587 | if (flags & BSF_NOT_AT_END) | |
1588 | strcat (buffer, " not-at-end"); | |
1589 | ||
1590 | if (flags & BSF_CONSTRUCTOR) | |
1591 | strcat (buffer, " constructor"); | |
1592 | ||
1593 | if (flags & BSF_WARNING) | |
1594 | strcat (buffer, " warning"); | |
1595 | ||
1596 | if (flags & BSF_INDIRECT) | |
1597 | strcat (buffer, " indirect"); | |
1598 | ||
1599 | if (flags & BSF_FILE) | |
1600 | strcat (buffer, " file"); | |
1601 | ||
1602 | if (flags & DYNAMIC) | |
1603 | strcat (buffer, " dynamic"); | |
1604 | ||
1605 | if (flags & ~(BSF_LOCAL | |
1606 | | BSF_GLOBAL | |
1607 | | BSF_DEBUGGING | |
1608 | | BSF_FUNCTION | |
1609 | | BSF_KEEP | |
1610 | | BSF_KEEP_G | |
1611 | | BSF_WEAK | |
1612 | | BSF_SECTION_SYM | |
1613 | | BSF_OLD_COMMON | |
1614 | | BSF_NOT_AT_END | |
1615 | | BSF_CONSTRUCTOR | |
1616 | | BSF_WARNING | |
1617 | | BSF_INDIRECT | |
1618 | | BSF_FILE | |
1619 | | BSF_DYNAMIC)) | |
1620 | strcat (buffer, " unknown-bits"); | |
1621 | ||
1622 | return buffer; | |
1623 | } | |
1624 | #endif | |
1625 | \f | |
1626 | #include "elfcore.h" | |
1627 | #include "elflink.h" | |
1628 | \f | |
1629 | /* Size-dependent data and functions. */ | |
1630 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1631 | sizeof (Elf_External_Ehdr), | |
1632 | sizeof (Elf_External_Phdr), | |
1633 | sizeof (Elf_External_Shdr), | |
1634 | sizeof (Elf_External_Rel), | |
1635 | sizeof (Elf_External_Rela), | |
1636 | sizeof (Elf_External_Sym), | |
1637 | sizeof (Elf_External_Dyn), | |
1638 | sizeof (Elf_External_Note), | |
70bcb145 | 1639 | 4, |
c7ac6ff8 | 1640 | 1, |
252b5132 RH |
1641 | ARCH_SIZE, FILE_ALIGN, |
1642 | ELFCLASS, EV_CURRENT, | |
1643 | elf_write_out_phdrs, | |
1644 | elf_write_shdrs_and_ehdr, | |
b9f66672 | 1645 | elf_write_relocs, |
73ff0d56 | 1646 | elf_swap_symbol_in, |
252b5132 RH |
1647 | elf_swap_symbol_out, |
1648 | elf_slurp_reloc_table, | |
1649 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1650 | elf_swap_dyn_in, |
1651 | elf_swap_dyn_out, | |
1652 | NULL, | |
1653 | NULL, | |
1654 | NULL, | |
1655 | NULL | |
252b5132 | 1656 | }; |