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, |
3db64b00 AM |
3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
4 | Free Software Foundation, Inc. | |
252b5132 RH |
5 | |
6 | Written by Fred Fish @ Cygnus Support, from information published | |
7 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
8 | Programming Support Tools". Sufficient support for gdb. | |
9 | ||
10 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
11 | published in "System V Application Binary Interface", chapters 4 | |
12 | and 5, as well as the various "Processor Supplement" documents | |
13 | derived from it. Added support for assembler and other object file | |
14 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
15 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
16 | of Utah) to finish and extend this. | |
17 | ||
cd123cb7 | 18 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 19 | |
cd123cb7 NC |
20 | This program is free software; you can redistribute it and/or modify |
21 | it under the terms of the GNU General Public License as published by | |
22 | the Free Software Foundation; either version 3 of the License, or | |
23 | (at your option) any later version. | |
252b5132 | 24 | |
cd123cb7 NC |
25 | This program is distributed in the hope that it will be useful, |
26 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | GNU General Public License for more details. | |
29 | ||
30 | You should have received a copy of the GNU General Public License | |
31 | along with this program; if not, write to the Free Software | |
32 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
33 | MA 02110-1301, USA. */ | |
252b5132 | 34 | |
252b5132 RH |
35 | |
36 | /* Problems and other issues to resolve. | |
37 | ||
38 | (1) BFD expects there to be some fixed number of "sections" in | |
0560d0f7 | 39 | the object file. I.E. there is a "section_count" variable in the |
252b5132 RH |
40 | bfd structure which contains the number of sections. However, ELF |
41 | supports multiple "views" of a file. In particular, with current | |
42 | implementations, executable files typically have two tables, a | |
43 | program header table and a section header table, both of which | |
44 | partition the executable. | |
45 | ||
46 | In ELF-speak, the "linking view" of the file uses the section header | |
47 | table to access "sections" within the file, and the "execution view" | |
48 | uses the program header table to access "segments" within the file. | |
49 | "Segments" typically may contain all the data from one or more | |
50 | "sections". | |
51 | ||
52 | Note that the section header table is optional in ELF executables, | |
53 | but it is this information that is most useful to gdb. If the | |
54 | section header table is missing, then gdb should probably try | |
55 | to make do with the program header table. (FIXME) | |
56 | ||
57 | (2) The code in this file is compiled twice, once in 32-bit mode and | |
58 | once in 64-bit mode. More of it should be made size-independent | |
59 | and moved into elf.c. | |
60 | ||
61 | (3) ELF section symbols are handled rather sloppily now. This should | |
62 | be cleaned up, and ELF section symbols reconciled with BFD section | |
63 | symbols. | |
64 | ||
65 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
66 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
67 | it's cast in stone. | |
68 | */ | |
69 | ||
252b5132 | 70 | #include "sysdep.h" |
3db64b00 | 71 | #include "bfd.h" |
210ba1e8 | 72 | #include "libiberty.h" |
252b5132 RH |
73 | #include "bfdlink.h" |
74 | #include "libbfd.h" | |
75 | #include "elf-bfd.h" | |
76 | ||
77 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ | |
78 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) | |
79 | #define Elf_External_Sym NAME(Elf,External_Sym) | |
80 | #define Elf_External_Shdr NAME(Elf,External_Shdr) | |
81 | #define Elf_External_Phdr NAME(Elf,External_Phdr) | |
82 | #define Elf_External_Rel NAME(Elf,External_Rel) | |
83 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
84 | #define Elf_External_Dyn NAME(Elf,External_Dyn) | |
85 | ||
86 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) | |
87 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
88 | #define elf_core_file_matches_executable_p \ | |
89 | NAME(bfd_elf,core_file_matches_executable_p) | |
90 | #define elf_object_p NAME(bfd_elf,object_p) | |
91 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
92 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) | |
93 | #define elf_get_dynamic_symtab_upper_bound \ | |
94 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
95 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) | |
96 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
97 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
98 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
99 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) | |
100 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
101 | #define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in) | |
102 | #define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out) | |
103 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
104 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
105 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
106 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
107 | #define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table) | |
6cee3f79 | 108 | #define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab) |
252b5132 RH |
109 | #define elf_canonicalize_dynamic_symtab \ |
110 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
4c45e5c9 JJ |
111 | #define elf_get_synthetic_symtab \ |
112 | NAME(bfd_elf,get_synthetic_symtab) | |
252b5132 RH |
113 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
114 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
115 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
116 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
117 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
118 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
119 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
120 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
121 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
122 | #define elf_find_section NAME(bfd_elf,find_section) | |
252b5132 RH |
123 | #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr) |
124 | #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs) | |
b9f66672 JL |
125 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
126 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
127 | |
128 | #if ARCH_SIZE == 64 | |
129 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
130 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
131 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
132 | #define ELFCLASS ELFCLASS64 | |
133 | #define FILE_ALIGN 8 | |
134 | #define LOG_FILE_ALIGN 3 | |
135 | #endif | |
136 | #if ARCH_SIZE == 32 | |
137 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
138 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
139 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
140 | #define ELFCLASS ELFCLASS32 | |
141 | #define FILE_ALIGN 4 | |
142 | #define LOG_FILE_ALIGN 2 | |
143 | #endif | |
144 | ||
e460dd0d | 145 | #if DEBUG & 2 |
268b6b39 | 146 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
e460dd0d AM |
147 | #endif |
148 | #if DEBUG & 1 | |
268b6b39 | 149 | static void elf_debug_file (Elf_Internal_Ehdr *); |
252b5132 RH |
150 | #endif |
151 | \f | |
152 | /* Structure swapping routines */ | |
153 | ||
154 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
155 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
156 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
157 | #define H_PUT_WORD H_PUT_64 |
158 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
159 | #define H_GET_WORD H_GET_64 | |
160 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
161 | #endif |
162 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
163 | #define H_PUT_WORD H_PUT_32 |
164 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
165 | #define H_GET_WORD H_GET_32 | |
166 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
167 | #endif |
168 | ||
169 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 170 | format. */ |
252b5132 | 171 | |
8384fb8f | 172 | bfd_boolean |
268b6b39 AM |
173 | elf_swap_symbol_in (bfd *abfd, |
174 | const void *psrc, | |
175 | const void *pshn, | |
176 | Elf_Internal_Sym *dst) | |
252b5132 | 177 | { |
268b6b39 AM |
178 | const Elf_External_Sym *src = psrc; |
179 | const Elf_External_Sym_Shndx *shndx = pshn; | |
86dc0f79 RH |
180 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
181 | ||
dc810e39 | 182 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 183 | if (signed_vma) |
dc810e39 | 184 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 185 | else |
dc810e39 AM |
186 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
187 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
188 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
189 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
190 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
9ad5cbcf AM |
191 | if (dst->st_shndx == SHN_XINDEX) |
192 | { | |
193 | if (shndx == NULL) | |
8384fb8f | 194 | return FALSE; |
9ad5cbcf AM |
195 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); |
196 | } | |
8384fb8f | 197 | return TRUE; |
252b5132 RH |
198 | } |
199 | ||
200 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 201 | format. */ |
252b5132 RH |
202 | |
203 | void | |
268b6b39 AM |
204 | elf_swap_symbol_out (bfd *abfd, |
205 | const Elf_Internal_Sym *src, | |
206 | void *cdst, | |
207 | void *shndx) | |
252b5132 | 208 | { |
9ad5cbcf | 209 | unsigned int tmp; |
268b6b39 | 210 | Elf_External_Sym *dst = cdst; |
dc810e39 AM |
211 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
212 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
213 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
214 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
215 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf AM |
216 | tmp = src->st_shndx; |
217 | if (tmp > SHN_HIRESERVE) | |
218 | { | |
219 | if (shndx == NULL) | |
220 | abort (); | |
221 | H_PUT_32 (abfd, tmp, shndx); | |
222 | tmp = SHN_XINDEX; | |
223 | } | |
224 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
225 | } |
226 | ||
252b5132 | 227 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 228 | internal format. */ |
252b5132 RH |
229 | |
230 | static void | |
268b6b39 AM |
231 | elf_swap_ehdr_in (bfd *abfd, |
232 | const Elf_External_Ehdr *src, | |
233 | Elf_Internal_Ehdr *dst) | |
252b5132 | 234 | { |
448cafa4 | 235 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 236 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
237 | dst->e_type = H_GET_16 (abfd, src->e_type); |
238 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
239 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 240 | if (signed_vma) |
dc810e39 | 241 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 242 | else |
dc810e39 AM |
243 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
244 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
245 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
246 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
247 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
248 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
249 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
250 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
251 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
252 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
253 | } |
254 | ||
255 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 256 | external format. */ |
252b5132 RH |
257 | |
258 | static void | |
268b6b39 AM |
259 | elf_swap_ehdr_out (bfd *abfd, |
260 | const Elf_Internal_Ehdr *src, | |
261 | Elf_External_Ehdr *dst) | |
252b5132 | 262 | { |
5732c114 | 263 | unsigned int tmp; |
448cafa4 | 264 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 265 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 266 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
267 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
268 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
269 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 270 | if (signed_vma) |
dc810e39 | 271 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 272 | else |
dc810e39 AM |
273 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
274 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
275 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
276 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
277 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
278 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
279 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
280 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 AM |
281 | tmp = src->e_shnum; |
282 | if (tmp >= SHN_LORESERVE) | |
283 | tmp = SHN_UNDEF; | |
284 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
285 | tmp = src->e_shstrndx; | |
286 | if (tmp >= SHN_LORESERVE) | |
287 | tmp = SHN_XINDEX; | |
288 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); | |
252b5132 RH |
289 | } |
290 | ||
252b5132 | 291 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 292 | ELF section header table entry in internal format. */ |
252b5132 RH |
293 | |
294 | static void | |
268b6b39 AM |
295 | elf_swap_shdr_in (bfd *abfd, |
296 | const Elf_External_Shdr *src, | |
297 | Elf_Internal_Shdr *dst) | |
252b5132 | 298 | { |
86dc0f79 RH |
299 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
300 | ||
dc810e39 AM |
301 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
302 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
303 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 304 | if (signed_vma) |
dc810e39 | 305 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 306 | else |
dc810e39 AM |
307 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
308 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
309 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
310 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
311 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
312 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
313 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
314 | dst->bfd_section = NULL; |
315 | dst->contents = NULL; | |
316 | } | |
317 | ||
318 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 319 | ELF section header table entry in external format. */ |
252b5132 RH |
320 | |
321 | static void | |
268b6b39 AM |
322 | elf_swap_shdr_out (bfd *abfd, |
323 | const Elf_Internal_Shdr *src, | |
324 | Elf_External_Shdr *dst) | |
252b5132 | 325 | { |
3e932841 | 326 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
327 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
328 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
329 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
330 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
331 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
332 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
333 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
334 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
335 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
336 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
337 | } |
338 | ||
252b5132 | 339 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 340 | ELF program header table entry in internal format. */ |
252b5132 RH |
341 | |
342 | void | |
268b6b39 AM |
343 | elf_swap_phdr_in (bfd *abfd, |
344 | const Elf_External_Phdr *src, | |
345 | Elf_Internal_Phdr *dst) | |
252b5132 | 346 | { |
86dc0f79 RH |
347 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
348 | ||
dc810e39 AM |
349 | dst->p_type = H_GET_32 (abfd, src->p_type); |
350 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
351 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
352 | if (signed_vma) |
353 | { | |
dc810e39 AM |
354 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
355 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
356 | } |
357 | else | |
358 | { | |
dc810e39 AM |
359 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
360 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 361 | } |
dc810e39 AM |
362 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
363 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
364 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
365 | } |
366 | ||
367 | void | |
268b6b39 AM |
368 | elf_swap_phdr_out (bfd *abfd, |
369 | const Elf_Internal_Phdr *src, | |
370 | Elf_External_Phdr *dst) | |
252b5132 | 371 | { |
3e932841 | 372 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
373 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
374 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
375 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
376 | H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr); | |
377 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); | |
378 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
379 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
380 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
381 | } |
382 | ||
3e932841 | 383 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 384 | void |
268b6b39 AM |
385 | elf_swap_reloc_in (bfd *abfd, |
386 | const bfd_byte *s, | |
387 | Elf_Internal_Rela *dst) | |
252b5132 | 388 | { |
947216bf | 389 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
390 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
391 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 392 | dst->r_addend = 0; |
252b5132 RH |
393 | } |
394 | ||
947216bf | 395 | void |
268b6b39 AM |
396 | elf_swap_reloca_in (bfd *abfd, |
397 | const bfd_byte *s, | |
398 | Elf_Internal_Rela *dst) | |
252b5132 | 399 | { |
947216bf | 400 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
401 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
402 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
403 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
404 | } |
405 | ||
3e932841 | 406 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 407 | void |
268b6b39 AM |
408 | elf_swap_reloc_out (bfd *abfd, |
409 | const Elf_Internal_Rela *src, | |
410 | bfd_byte *d) | |
252b5132 | 411 | { |
947216bf | 412 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
413 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
414 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
415 | } |
416 | ||
947216bf | 417 | void |
268b6b39 AM |
418 | elf_swap_reloca_out (bfd *abfd, |
419 | const Elf_Internal_Rela *src, | |
420 | bfd_byte *d) | |
252b5132 | 421 | { |
947216bf | 422 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
423 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
424 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
425 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
426 | } |
427 | ||
268b6b39 AM |
428 | void |
429 | elf_swap_dyn_in (bfd *abfd, | |
430 | const void *p, | |
431 | Elf_Internal_Dyn *dst) | |
252b5132 | 432 | { |
268b6b39 | 433 | const Elf_External_Dyn *src = p; |
252b5132 | 434 | |
dc810e39 AM |
435 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
436 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
437 | } |
438 | ||
268b6b39 AM |
439 | void |
440 | elf_swap_dyn_out (bfd *abfd, | |
441 | const Elf_Internal_Dyn *src, | |
442 | void *p) | |
252b5132 | 443 | { |
268b6b39 | 444 | Elf_External_Dyn *dst = p; |
c7ac6ff8 | 445 | |
dc810e39 AM |
446 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
447 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
448 | } |
449 | \f | |
450 | /* ELF .o/exec file reading */ | |
451 | ||
252b5132 RH |
452 | /* Begin processing a given object. |
453 | ||
454 | First we validate the file by reading in the ELF header and checking | |
455 | the magic number. */ | |
456 | ||
268b6b39 AM |
457 | static inline bfd_boolean |
458 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
459 | { |
460 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
461 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
462 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
463 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
464 | } | |
465 | ||
5e1b4a6d NC |
466 | /* Determines if a given section index is valid. */ |
467 | ||
468 | static inline bfd_boolean | |
469 | valid_section_index_p (unsigned index, unsigned num_sections) | |
470 | { | |
471 | /* Note: We allow SHN_UNDEF as a valid section index. */ | |
472 | if (index < SHN_LORESERVE || index > SHN_HIRESERVE) | |
473 | return index < num_sections; | |
474 | ||
475 | /* We disallow the use of reserved indcies, except for those | |
476 | with OS or Application specific meaning. The test make use | |
477 | of the knowledge that: | |
478 | SHN_LORESERVE == SHN_LOPROC | |
479 | and | |
480 | SHN_HIPROC == SHN_LOOS - 1 */ | |
481 | /* XXX - Should we allow SHN_XINDEX as a valid index here ? */ | |
482 | return (index >= SHN_LOPROC && index <= SHN_HIOS); | |
483 | } | |
484 | ||
252b5132 RH |
485 | /* Check to see if the file associated with ABFD matches the target vector |
486 | that ABFD points to. | |
487 | ||
488 | Note that we may be called several times with the same ABFD, but different | |
489 | target vectors, most of which will not match. We have to avoid leaving | |
490 | any side effects in ABFD, or any data it points to (like tdata), if the | |
491 | file does not match the target vector. */ | |
492 | ||
493 | const bfd_target * | |
268b6b39 | 494 | elf_object_p (bfd *abfd) |
252b5132 RH |
495 | { |
496 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
497 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
498 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 499 | Elf_Internal_Shdr i_shdr; |
ed591155 | 500 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 501 | unsigned int shindex; |
9c5bfbb7 | 502 | const struct elf_backend_data *ebd; |
ed591155 | 503 | struct bfd_preserve preserve; |
252b5132 | 504 | asection *s; |
dc810e39 | 505 | bfd_size_type amt; |
d1036acb L |
506 | const bfd_target *target; |
507 | const bfd_target * const *target_ptr; | |
252b5132 | 508 | |
e84d6fca | 509 | preserve.marker = NULL; |
a17cc40f | 510 | |
252b5132 RH |
511 | /* Read in the ELF header in external format. */ |
512 | ||
268b6b39 | 513 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
514 | { |
515 | if (bfd_get_error () != bfd_error_system_call) | |
516 | goto got_wrong_format_error; | |
517 | else | |
518 | goto got_no_match; | |
519 | } | |
520 | ||
521 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
522 | make use of. The magic number must match, the address size ('class') | |
523 | and byte-swapping must match our XVEC entry, and it must have a | |
524 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 525 | file). */ |
252b5132 | 526 | |
82e51918 AM |
527 | if (! elf_file_p (&x_ehdr) |
528 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
529 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
530 | goto got_wrong_format_error; |
531 | ||
532 | /* Check that file's byte order matches xvec's */ | |
533 | switch (x_ehdr.e_ident[EI_DATA]) | |
534 | { | |
535 | case ELFDATA2MSB: /* Big-endian */ | |
536 | if (! bfd_header_big_endian (abfd)) | |
537 | goto got_wrong_format_error; | |
538 | break; | |
539 | case ELFDATA2LSB: /* Little-endian */ | |
540 | if (! bfd_header_little_endian (abfd)) | |
541 | goto got_wrong_format_error; | |
542 | break; | |
543 | case ELFDATANONE: /* No data encoding specified */ | |
544 | default: /* Unknown data encoding specified */ | |
545 | goto got_wrong_format_error; | |
546 | } | |
547 | ||
0c83546a AM |
548 | if (!bfd_preserve_save (abfd, &preserve)) |
549 | goto got_no_match; | |
550 | ||
d1036acb L |
551 | target = abfd->xvec; |
552 | ||
252b5132 RH |
553 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
554 | the tdata pointer in the bfd. */ | |
555 | ||
d1036acb | 556 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 557 | goto got_no_match; |
0c83546a | 558 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 559 | |
252b5132 RH |
560 | /* Now that we know the byte order, swap in the rest of the header */ |
561 | i_ehdrp = elf_elfheader (abfd); | |
562 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
563 | #if DEBUG & 1 | |
564 | elf_debug_file (i_ehdrp); | |
565 | #endif | |
566 | ||
567 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
568 | if (i_ehdrp->e_type == ET_CORE) | |
569 | goto got_wrong_format_error; | |
570 | ||
0c35f01a AM |
571 | /* If this is a relocatable file and there is no section header |
572 | table, then we're hosed. */ | |
573 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
574 | goto got_wrong_format_error; |
575 | ||
e460dd0d | 576 | /* As a simple sanity check, verify that what BFD thinks is the |
252b5132 | 577 | size of each section header table entry actually matches the size |
0c35f01a AM |
578 | recorded in the file, but only if there are any sections. */ |
579 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
580 | goto got_wrong_format_error; |
581 | ||
7ece0d85 JJ |
582 | /* Further sanity check. */ |
583 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
584 | goto got_wrong_format_error; | |
585 | ||
252b5132 RH |
586 | ebd = get_elf_backend_data (abfd); |
587 | ||
588 | /* Check that the ELF e_machine field matches what this particular | |
589 | BFD format expects. */ | |
590 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
591 | && (ebd->elf_machine_alt1 == 0 |
592 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
593 | && (ebd->elf_machine_alt2 == 0 | |
594 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 | 595 | { |
252b5132 RH |
596 | if (ebd->elf_machine_code != EM_NONE) |
597 | goto got_wrong_format_error; | |
598 | ||
599 | /* This is the generic ELF target. Let it match any ELF target | |
600 | for which we do not have a specific backend. */ | |
601 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
602 | { | |
9c5bfbb7 | 603 | const struct elf_backend_data *back; |
252b5132 RH |
604 | |
605 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
606 | continue; | |
9c5bfbb7 | 607 | back = (const struct elf_backend_data *) (*target_ptr)->backend_data; |
252b5132 RH |
608 | if (back->elf_machine_code == i_ehdrp->e_machine |
609 | || (back->elf_machine_alt1 != 0 | |
610 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
611 | || (back->elf_machine_alt2 != 0 | |
612 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
613 | { | |
614 | /* target_ptr is an ELF backend which matches this | |
615 | object file, so reject the generic ELF target. */ | |
616 | goto got_wrong_format_error; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | if (i_ehdrp->e_type == ET_EXEC) | |
622 | abfd->flags |= EXEC_P; | |
623 | else if (i_ehdrp->e_type == ET_DYN) | |
624 | abfd->flags |= DYNAMIC; | |
625 | ||
626 | if (i_ehdrp->e_phnum > 0) | |
627 | abfd->flags |= D_PAGED; | |
628 | ||
629 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
630 | { | |
631 | /* It's OK if this fails for the generic target. */ | |
632 | if (ebd->elf_machine_code != EM_NONE) | |
633 | goto got_no_match; | |
634 | } | |
635 | ||
d1036acb L |
636 | if (ebd->elf_machine_code != EM_NONE |
637 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi) | |
638 | { | |
639 | if (ebd->elf_osabi != ELFOSABI_NONE) | |
640 | goto got_wrong_format_error; | |
641 | ||
642 | /* This is an ELFOSABI_NONE ELF target. Let it match any ELF | |
643 | target of the compatible machine for which we do not have a | |
644 | backend with matching ELFOSABI. */ | |
645 | for (target_ptr = bfd_target_vector; | |
646 | *target_ptr != NULL; | |
647 | target_ptr++) | |
648 | { | |
649 | const struct elf_backend_data *back; | |
650 | ||
651 | /* Skip this target and targets with incompatible byte | |
652 | order. */ | |
653 | if (*target_ptr == target | |
654 | || (*target_ptr)->flavour != bfd_target_elf_flavour | |
655 | || (*target_ptr)->byteorder != target->byteorder | |
656 | || ((*target_ptr)->header_byteorder | |
657 | != target->header_byteorder)) | |
658 | continue; | |
659 | ||
660 | back = (const struct elf_backend_data *) (*target_ptr)->backend_data; | |
661 | if (back->elf_osabi == i_ehdrp->e_ident[EI_OSABI] | |
662 | && (back->elf_machine_code == i_ehdrp->e_machine | |
663 | || (back->elf_machine_alt1 != 0 | |
664 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
665 | || (back->elf_machine_alt2 != 0 | |
666 | && back->elf_machine_alt2 == i_ehdrp->e_machine))) | |
667 | { | |
668 | /* target_ptr is an ELF backend which matches this | |
669 | object file, so reject the ELFOSABI_NONE ELF target. */ | |
670 | goto got_wrong_format_error; | |
671 | } | |
672 | } | |
673 | } | |
674 | ||
7ece0d85 JJ |
675 | if (i_ehdrp->e_shoff != 0) |
676 | { | |
0560d0f7 AM |
677 | bfd_signed_vma where = i_ehdrp->e_shoff; |
678 | ||
679 | if (where != (file_ptr) where) | |
680 | goto got_wrong_format_error; | |
681 | ||
7ece0d85 | 682 | /* Seek to the section header table in the file. */ |
0560d0f7 | 683 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) |
7ece0d85 | 684 | goto got_no_match; |
5732c114 | 685 | |
7ece0d85 JJ |
686 | /* Read the first section header at index 0, and convert to internal |
687 | form. */ | |
268b6b39 | 688 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
689 | goto got_no_match; |
690 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 691 | |
7ece0d85 JJ |
692 | /* If the section count is zero, the actual count is in the first |
693 | section header. */ | |
694 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
695 | { |
696 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
24639c7d JJ |
697 | if (i_ehdrp->e_shnum != i_shdr.sh_size |
698 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
699 | goto got_wrong_format_error; |
700 | } | |
5732c114 | 701 | |
7ece0d85 JJ |
702 | /* And similarly for the string table index. */ |
703 | if (i_ehdrp->e_shstrndx == SHN_XINDEX) | |
0560d0f7 AM |
704 | { |
705 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
706 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
707 | goto got_wrong_format_error; | |
708 | } | |
709 | ||
710 | /* Sanity check that we can read all of the section headers. | |
711 | It ought to be good enough to just read the last one. */ | |
712 | if (i_ehdrp->e_shnum != 1) | |
713 | { | |
714 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
715 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
716 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
717 | goto got_wrong_format_error; |
718 | ||
719 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
720 | if (where != (file_ptr) where) | |
721 | goto got_wrong_format_error; | |
722 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) | |
723 | goto got_wrong_format_error; | |
724 | ||
725 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
726 | goto got_no_match; | |
727 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
728 | goto got_no_match; | |
729 | ||
730 | /* Back to where we were. */ | |
731 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
732 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
733 | goto got_no_match; | |
734 | } | |
7ece0d85 | 735 | } |
5732c114 | 736 | |
252b5132 | 737 | /* Allocate space for a copy of the section header table in |
5732c114 | 738 | internal form. */ |
0c35f01a AM |
739 | if (i_ehdrp->e_shnum != 0) |
740 | { | |
5732c114 | 741 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 742 | unsigned int num_sec; |
5732c114 | 743 | |
0c35f01a | 744 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
268b6b39 | 745 | i_shdrp = bfd_alloc (abfd, amt); |
5732c114 AM |
746 | if (!i_shdrp) |
747 | goto got_no_match; | |
9ad5cbcf AM |
748 | num_sec = i_ehdrp->e_shnum; |
749 | if (num_sec > SHN_LORESERVE) | |
750 | num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
751 | elf_numsections (abfd) = num_sec; | |
752 | amt = sizeof (i_shdrp) * num_sec; | |
268b6b39 | 753 | elf_elfsections (abfd) = bfd_alloc (abfd, amt); |
5732c114 | 754 | if (!elf_elfsections (abfd)) |
0c35f01a | 755 | goto got_no_match; |
5732c114 AM |
756 | |
757 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
758 | shdrp = i_shdrp; | |
759 | shindex = 0; | |
9ad5cbcf | 760 | if (num_sec > SHN_LORESERVE) |
5732c114 AM |
761 | { |
762 | for ( ; shindex < SHN_LORESERVE; shindex++) | |
763 | elf_elfsections (abfd)[shindex] = shdrp++; | |
764 | for ( ; shindex < SHN_HIRESERVE + 1; shindex++) | |
9ad5cbcf | 765 | elf_elfsections (abfd)[shindex] = i_shdrp; |
5732c114 | 766 | } |
9ad5cbcf | 767 | for ( ; shindex < num_sec; shindex++) |
5732c114 | 768 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 769 | |
ed591155 AM |
770 | /* Read in the rest of the section header table and convert it |
771 | to internal form. */ | |
772 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
773 | { | |
268b6b39 | 774 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
775 | goto got_no_match; |
776 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
777 | ||
24639c7d | 778 | /* Sanity check sh_link and sh_info. */ |
5e1b4a6d | 779 | if (! valid_section_index_p (i_shdrp[shindex].sh_link, num_sec)) |
24639c7d JJ |
780 | goto got_wrong_format_error; |
781 | ||
782 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
783 | || i_shdrp[shindex].sh_type == SHT_RELA | |
784 | || i_shdrp[shindex].sh_type == SHT_REL) | |
5e1b4a6d | 785 | && ! valid_section_index_p (i_shdrp[shindex].sh_info, num_sec)) |
24639c7d JJ |
786 | goto got_wrong_format_error; |
787 | ||
ed591155 AM |
788 | /* If the section is loaded, but not page aligned, clear |
789 | D_PAGED. */ | |
790 | if (i_shdrp[shindex].sh_size != 0 | |
791 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
792 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
793 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 794 | % ebd->minpagesize) |
ed591155 AM |
795 | != 0)) |
796 | abfd->flags &= ~D_PAGED; | |
797 | } | |
252b5132 | 798 | } |
ed591155 | 799 | |
24639c7d JJ |
800 | /* A further sanity check. */ |
801 | if (i_ehdrp->e_shnum != 0) | |
802 | { | |
5e1b4a6d | 803 | if (! valid_section_index_p (i_ehdrp->e_shstrndx, elf_numsections (abfd))) |
0b49d371 NC |
804 | { |
805 | /* PR 2257: | |
806 | We used to just goto got_wrong_format_error here | |
807 | but there are binaries in existance for which this test | |
808 | will prevent the binutils from working with them at all. | |
809 | So we are kind, and reset the string index value to 0 | |
810 | so that at least some processing can be done. */ | |
811 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
812 | _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename); | |
813 | } | |
24639c7d | 814 | } |
0b49d371 | 815 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
816 | goto got_wrong_format_error; |
817 | ||
252b5132 RH |
818 | /* Read in the program headers. */ |
819 | if (i_ehdrp->e_phnum == 0) | |
820 | elf_tdata (abfd)->phdr = NULL; | |
821 | else | |
822 | { | |
823 | Elf_Internal_Phdr *i_phdr; | |
824 | unsigned int i; | |
825 | ||
dc810e39 | 826 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
268b6b39 | 827 | elf_tdata (abfd)->phdr = bfd_alloc (abfd, amt); |
252b5132 RH |
828 | if (elf_tdata (abfd)->phdr == NULL) |
829 | goto got_no_match; | |
dc810e39 | 830 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
831 | goto got_no_match; |
832 | i_phdr = elf_tdata (abfd)->phdr; | |
833 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
834 | { | |
835 | Elf_External_Phdr x_phdr; | |
836 | ||
268b6b39 | 837 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
838 | goto got_no_match; |
839 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
840 | } | |
841 | } | |
842 | ||
1b3a8575 | 843 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 844 | { |
9ad5cbcf AM |
845 | unsigned int num_sec; |
846 | ||
0c35f01a AM |
847 | /* Once all of the section headers have been read and converted, we |
848 | can start processing them. Note that the first section header is | |
849 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
850 | num_sec = elf_numsections (abfd); |
851 | for (shindex = 1; shindex < num_sec; shindex++) | |
0c35f01a AM |
852 | { |
853 | if (! bfd_section_from_shdr (abfd, shindex)) | |
854 | goto got_no_match; | |
9ad5cbcf AM |
855 | if (shindex == SHN_LORESERVE - 1) |
856 | shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
0c35f01a | 857 | } |
3d7f7666 | 858 | |
dd863624 L |
859 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
860 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 861 | goto got_wrong_format_error; |
252b5132 RH |
862 | } |
863 | ||
864 | /* Let the backend double check the format and override global | |
865 | information. */ | |
866 | if (ebd->elf_backend_object_p) | |
867 | { | |
82e51918 | 868 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
869 | goto got_wrong_format_error; |
870 | } | |
871 | ||
a14199db AM |
872 | /* Remember the entry point specified in the ELF file header. */ |
873 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
874 | ||
252b5132 RH |
875 | /* If we have created any reloc sections that are associated with |
876 | debugging sections, mark the reloc sections as debugging as well. */ | |
877 | for (s = abfd->sections; s != NULL; s = s->next) | |
878 | { | |
879 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
880 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
881 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
882 | { | |
883 | unsigned long targ_index; | |
884 | asection *targ_sec; | |
885 | ||
886 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
887 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
888 | if (targ_sec != NULL | |
889 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
890 | s->flags |= SEC_DEBUGGING; | |
891 | } | |
892 | } | |
893 | ||
e84d6fca | 894 | bfd_preserve_finish (abfd, &preserve); |
d1036acb | 895 | return target; |
252b5132 RH |
896 | |
897 | got_wrong_format_error: | |
a77a9fef HPN |
898 | /* There is way too much undoing of half-known state here. The caller, |
899 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
900 | check match/no-match like it does. We have to rely on that a call to | |
901 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
902 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
903 | For this to work, only elf-data and the mach may be changed by the | |
904 | target-specific elf_backend_object_p function. Note that saving the | |
905 | whole bfd here and restoring it would be even worse; the first thing | |
906 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 907 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 908 | |
252b5132 | 909 | got_no_match: |
e84d6fca AM |
910 | if (preserve.marker != NULL) |
911 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 912 | return NULL; |
252b5132 RH |
913 | } |
914 | \f | |
915 | /* ELF .o/exec file writing */ | |
916 | ||
917 | /* Write out the relocs. */ | |
918 | ||
b9f66672 | 919 | void |
268b6b39 | 920 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 921 | { |
268b6b39 | 922 | bfd_boolean *failedp = data; |
252b5132 | 923 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 924 | bfd_vma addr_offset; |
c39a58e6 | 925 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
926 | size_t extsize; |
927 | bfd_byte *dst_rela; | |
252b5132 | 928 | unsigned int idx; |
947216bf AM |
929 | asymbol *last_sym; |
930 | int last_sym_idx; | |
252b5132 RH |
931 | |
932 | /* If we have already failed, don't do anything. */ | |
933 | if (*failedp) | |
934 | return; | |
935 | ||
936 | if ((sec->flags & SEC_RELOC) == 0) | |
937 | return; | |
938 | ||
939 | /* The linker backend writes the relocs out itself, and sets the | |
940 | reloc_count field to zero to inhibit writing them here. Also, | |
941 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
942 | relocs. */ | |
943 | if (sec->reloc_count == 0) | |
944 | return; | |
945 | ||
9a44bbd9 DJ |
946 | /* If we have opened an existing file for update, reloc_count may be |
947 | set even though we are not linking. In that case we have nothing | |
948 | to do. */ | |
949 | if (sec->orelocation == NULL) | |
950 | return; | |
951 | ||
252b5132 RH |
952 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
953 | ||
954 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
268b6b39 | 955 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
956 | if (rela_hdr->contents == NULL) |
957 | { | |
b34976b6 | 958 | *failedp = TRUE; |
252b5132 RH |
959 | return; |
960 | } | |
961 | ||
bf572ba0 MM |
962 | /* Figure out whether the relocations are RELA or REL relocations. */ |
963 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
964 | { |
965 | swap_out = elf_swap_reloca_out; | |
966 | extsize = sizeof (Elf_External_Rela); | |
967 | } | |
bf572ba0 | 968 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
969 | { |
970 | swap_out = elf_swap_reloc_out; | |
971 | extsize = sizeof (Elf_External_Rel); | |
972 | } | |
bf572ba0 MM |
973 | else |
974 | /* Every relocation section should be either an SHT_RELA or an | |
975 | SHT_REL section. */ | |
976 | abort (); | |
977 | ||
947216bf AM |
978 | /* The address of an ELF reloc is section relative for an object |
979 | file, and absolute for an executable file or shared library. | |
980 | The address of a BFD reloc is always section relative. */ | |
981 | addr_offset = 0; | |
982 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
983 | addr_offset = sec->vma; | |
984 | ||
3e932841 | 985 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
986 | last_sym = 0; |
987 | last_sym_idx = 0; | |
988 | dst_rela = rela_hdr->contents; | |
252b5132 | 989 | |
947216bf AM |
990 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
991 | { | |
992 | Elf_Internal_Rela src_rela; | |
993 | arelent *ptr; | |
994 | asymbol *sym; | |
995 | int n; | |
996 | ||
997 | ptr = sec->orelocation[idx]; | |
998 | sym = *ptr->sym_ptr_ptr; | |
999 | if (sym == last_sym) | |
1000 | n = last_sym_idx; | |
1001 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
1002 | n = STN_UNDEF; | |
1003 | else | |
252b5132 | 1004 | { |
947216bf AM |
1005 | last_sym = sym; |
1006 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
1007 | if (n < 0) | |
252b5132 | 1008 | { |
b34976b6 | 1009 | *failedp = TRUE; |
252b5132 RH |
1010 | return; |
1011 | } | |
947216bf | 1012 | last_sym_idx = n; |
252b5132 | 1013 | } |
252b5132 | 1014 | |
947216bf AM |
1015 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
1016 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
1017 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 1018 | { |
b34976b6 | 1019 | *failedp = TRUE; |
947216bf | 1020 | return; |
252b5132 | 1021 | } |
947216bf AM |
1022 | |
1023 | src_rela.r_offset = ptr->address + addr_offset; | |
1024 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
1025 | src_rela.r_addend = ptr->addend; | |
1026 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
1027 | } |
1028 | } | |
1029 | ||
1030 | /* Write out the program headers. */ | |
1031 | ||
1032 | int | |
268b6b39 AM |
1033 | elf_write_out_phdrs (bfd *abfd, |
1034 | const Elf_Internal_Phdr *phdr, | |
1035 | unsigned int count) | |
252b5132 RH |
1036 | { |
1037 | while (count--) | |
1038 | { | |
1039 | Elf_External_Phdr extphdr; | |
1040 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
1041 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1042 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1043 | return -1; |
1044 | phdr++; | |
1045 | } | |
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | /* Write out the section headers and the ELF file header. */ | |
1050 | ||
b34976b6 | 1051 | bfd_boolean |
268b6b39 | 1052 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1053 | { |
1054 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1055 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1056 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1057 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1058 | unsigned int count; | |
dc810e39 | 1059 | bfd_size_type amt; |
252b5132 RH |
1060 | |
1061 | i_ehdrp = elf_elfheader (abfd); | |
1062 | i_shdrp = elf_elfsections (abfd); | |
1063 | ||
3e932841 | 1064 | /* swap the header before spitting it out... */ |
252b5132 RH |
1065 | |
1066 | #if DEBUG & 1 | |
1067 | elf_debug_file (i_ehdrp); | |
1068 | #endif | |
1069 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1070 | amt = sizeof (x_ehdr); |
252b5132 | 1071 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1072 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1073 | return FALSE; |
252b5132 | 1074 | |
5732c114 AM |
1075 | /* Some fields in the first section header handle overflow of ehdr |
1076 | fields. */ | |
1077 | if (i_ehdrp->e_shnum >= SHN_LORESERVE) | |
1078 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; | |
1079 | if (i_ehdrp->e_shstrndx >= SHN_LORESERVE) | |
1080 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; | |
1081 | ||
3e932841 | 1082 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1083 | amt = i_ehdrp->e_shnum; |
1084 | amt *= sizeof (*x_shdrp); | |
268b6b39 | 1085 | x_shdrp = bfd_alloc (abfd, amt); |
252b5132 | 1086 | if (!x_shdrp) |
b34976b6 | 1087 | return FALSE; |
252b5132 | 1088 | |
5732c114 | 1089 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1090 | { |
1091 | #if DEBUG & 2 | |
5732c114 | 1092 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1093 | #endif |
5732c114 | 1094 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
b34976b6 | 1095 | |
5732c114 AM |
1096 | if (count == SHN_LORESERVE - 1) |
1097 | i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
1098 | } |
1099 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 1100 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1101 | return FALSE; |
252b5132 | 1102 | |
3e932841 | 1103 | /* need to dump the string table too... */ |
252b5132 | 1104 | |
b34976b6 | 1105 | return TRUE; |
252b5132 RH |
1106 | } |
1107 | ||
1108 | long | |
268b6b39 | 1109 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1110 | { |
1111 | Elf_Internal_Shdr *hdr; | |
1112 | Elf_Internal_Shdr *verhdr; | |
1113 | unsigned long symcount; /* Number of external ELF symbols */ | |
1114 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1115 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1116 | Elf_Internal_Sym *isym; |
1117 | Elf_Internal_Sym *isymend; | |
1118 | Elf_Internal_Sym *isymbuf = NULL; | |
1119 | Elf_External_Versym *xver; | |
1120 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1121 | const struct elf_backend_data *ebd; |
dc810e39 | 1122 | bfd_size_type amt; |
252b5132 RH |
1123 | |
1124 | /* Read each raw ELF symbol, converting from external ELF form to | |
1125 | internal ELF form, and then using the information to create a | |
1126 | canonical bfd symbol table entry. | |
1127 | ||
1128 | Note that we allocate the initial bfd canonical symbol buffer | |
1129 | based on a one-to-one mapping of the ELF symbols to canonical | |
1130 | symbols. We actually use all the ELF symbols, so there will be no | |
1131 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1132 | build the caller's pointer vector. */ |
252b5132 RH |
1133 | |
1134 | if (! dynamic) | |
1135 | { | |
1136 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1137 | verhdr = NULL; | |
1138 | } | |
1139 | else | |
1140 | { | |
1141 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1142 | if (elf_dynversym (abfd) == 0) | |
1143 | verhdr = NULL; | |
1144 | else | |
1145 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1146 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1147 | && elf_tdata (abfd)->verdef == NULL) | |
1148 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1149 | && elf_tdata (abfd)->verref == NULL)) | |
1150 | { | |
fc0e6df6 | 1151 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1152 | return -1; |
1153 | } | |
1154 | } | |
1155 | ||
6cdc0ccc | 1156 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1157 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1158 | if (symcount == 0) |
1159 | sym = symbase = NULL; | |
1160 | else | |
1161 | { | |
6cdc0ccc AM |
1162 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1163 | NULL, NULL, NULL); | |
1164 | if (isymbuf == NULL) | |
1165 | return -1; | |
252b5132 | 1166 | |
dc810e39 AM |
1167 | amt = symcount; |
1168 | amt *= sizeof (elf_symbol_type); | |
268b6b39 | 1169 | symbase = bfd_zalloc (abfd, amt); |
252b5132 | 1170 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1171 | goto error_return; |
252b5132 RH |
1172 | |
1173 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1174 | if (verhdr != NULL |
1175 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1176 | { | |
1177 | (*_bfd_error_handler) | |
1178 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1179 | abfd->filename, | |
1180 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1181 | symcount); | |
1182 | ||
1183 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1184 | since that is more helpful than just quitting. */ |
252b5132 RH |
1185 | verhdr = NULL; |
1186 | } | |
1187 | ||
1188 | if (verhdr != NULL) | |
1189 | { | |
1190 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1191 | goto error_return; | |
1192 | ||
268b6b39 | 1193 | xverbuf = bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1194 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1195 | goto error_return; |
1196 | ||
268b6b39 | 1197 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1198 | goto error_return; |
1199 | } | |
1200 | ||
1201 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1202 | xver = xverbuf; |
1203 | if (xver != NULL) | |
1204 | ++xver; | |
1205 | isymend = isymbuf + symcount; | |
1206 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1207 | { |
6cdc0ccc | 1208 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1209 | sym->symbol.the_bfd = abfd; |
1210 | ||
26c61ae5 | 1211 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
252b5132 | 1212 | |
6cdc0ccc | 1213 | sym->symbol.value = isym->st_value; |
252b5132 | 1214 | |
6cdc0ccc | 1215 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1216 | { |
1217 | sym->symbol.section = bfd_und_section_ptr; | |
1218 | } | |
6cdc0ccc AM |
1219 | else if (isym->st_shndx < SHN_LORESERVE |
1220 | || isym->st_shndx > SHN_HIRESERVE) | |
252b5132 | 1221 | { |
140f6c8e AM |
1222 | sym->symbol.section = bfd_section_from_elf_index (abfd, |
1223 | isym->st_shndx); | |
252b5132 RH |
1224 | if (sym->symbol.section == NULL) |
1225 | { | |
1226 | /* This symbol is in a section for which we did not | |
1227 | create a BFD section. Just use bfd_abs_section, | |
1228 | although it is wrong. FIXME. */ | |
1229 | sym->symbol.section = bfd_abs_section_ptr; | |
1230 | } | |
1231 | } | |
6cdc0ccc | 1232 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1233 | { |
1234 | sym->symbol.section = bfd_abs_section_ptr; | |
1235 | } | |
6cdc0ccc | 1236 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1237 | { |
1238 | sym->symbol.section = bfd_com_section_ptr; | |
1239 | /* Elf puts the alignment into the `value' field, and | |
1240 | the size into the `size' field. BFD wants to see the | |
1241 | size in the value field, and doesn't care (at the | |
1242 | moment) about the alignment. */ | |
6cdc0ccc | 1243 | sym->symbol.value = isym->st_size; |
252b5132 | 1244 | } |
252b5132 RH |
1245 | else |
1246 | sym->symbol.section = bfd_abs_section_ptr; | |
1247 | ||
1049f94e | 1248 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1249 | already section relative. */ |
252b5132 RH |
1250 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1251 | sym->symbol.value -= sym->symbol.section->vma; | |
1252 | ||
6cdc0ccc | 1253 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1254 | { |
1255 | case STB_LOCAL: | |
1256 | sym->symbol.flags |= BSF_LOCAL; | |
1257 | break; | |
1258 | case STB_GLOBAL: | |
6cdc0ccc | 1259 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1260 | sym->symbol.flags |= BSF_GLOBAL; |
1261 | break; | |
1262 | case STB_WEAK: | |
1263 | sym->symbol.flags |= BSF_WEAK; | |
1264 | break; | |
1265 | } | |
1266 | ||
6cdc0ccc | 1267 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1268 | { |
1269 | case STT_SECTION: | |
1270 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1271 | break; | |
1272 | case STT_FILE: | |
1273 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1274 | break; | |
1275 | case STT_FUNC: | |
1276 | sym->symbol.flags |= BSF_FUNCTION; | |
1277 | break; | |
1278 | case STT_OBJECT: | |
1279 | sym->symbol.flags |= BSF_OBJECT; | |
1280 | break; | |
0be9069d L |
1281 | case STT_TLS: |
1282 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1283 | break; | |
d9352518 DB |
1284 | case STT_RELC: |
1285 | sym->symbol.flags |= BSF_RELC; | |
1286 | break; | |
1287 | case STT_SRELC: | |
1288 | sym->symbol.flags |= BSF_SRELC; | |
1289 | break; | |
252b5132 RH |
1290 | } |
1291 | ||
1292 | if (dynamic) | |
1293 | sym->symbol.flags |= BSF_DYNAMIC; | |
1294 | ||
6cdc0ccc | 1295 | if (xver != NULL) |
252b5132 RH |
1296 | { |
1297 | Elf_Internal_Versym iversym; | |
1298 | ||
6cdc0ccc | 1299 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1300 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1301 | xver++; |
252b5132 RH |
1302 | } |
1303 | ||
1304 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1305 | if (ebd->elf_backend_symbol_processing) |
1306 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1307 | } |
1308 | } | |
1309 | ||
1310 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1311 | if (ebd->elf_backend_symbol_table_processing) |
1312 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1313 | |
1314 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1315 | ||
1316 | symcount = sym - symbase; | |
1317 | ||
1318 | /* Fill in the user's symbol pointer vector if needed. */ | |
1319 | if (symptrs) | |
1320 | { | |
1321 | long l = symcount; | |
1322 | ||
1323 | sym = symbase; | |
1324 | while (l-- > 0) | |
1325 | { | |
1326 | *symptrs++ = &sym->symbol; | |
1327 | sym++; | |
1328 | } | |
1329 | *symptrs = 0; /* Final null pointer */ | |
1330 | } | |
1331 | ||
6cdc0ccc AM |
1332 | if (xverbuf != NULL) |
1333 | free (xverbuf); | |
1334 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1335 | free (isymbuf); | |
252b5132 | 1336 | return symcount; |
9ad5cbcf | 1337 | |
252b5132 | 1338 | error_return: |
6cdc0ccc AM |
1339 | if (xverbuf != NULL) |
1340 | free (xverbuf); | |
1341 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1342 | free (isymbuf); | |
252b5132 RH |
1343 | return -1; |
1344 | } | |
1345 | ||
5c799c07 | 1346 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1347 | them. */ |
252b5132 | 1348 | |
b34976b6 | 1349 | static bfd_boolean |
268b6b39 AM |
1350 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1351 | asection *asect, | |
1352 | Elf_Internal_Shdr *rel_hdr, | |
1353 | bfd_size_type reloc_count, | |
1354 | arelent *relents, | |
1355 | asymbol **symbols, | |
1356 | bfd_boolean dynamic) | |
252b5132 | 1357 | { |
9c5bfbb7 | 1358 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1359 | void *allocated = NULL; |
252b5132 | 1360 | bfd_byte *native_relocs; |
252b5132 RH |
1361 | arelent *relent; |
1362 | unsigned int i; | |
1363 | int entsize; | |
5ad8645c | 1364 | unsigned int symcount; |
252b5132 | 1365 | |
268b6b39 | 1366 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1367 | if (allocated == NULL) |
1368 | goto error_return; | |
1369 | ||
1370 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1371 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1372 | != rel_hdr->sh_size)) |
1373 | goto error_return; | |
1374 | ||
268b6b39 | 1375 | native_relocs = allocated; |
252b5132 | 1376 | |
252b5132 RH |
1377 | entsize = rel_hdr->sh_entsize; |
1378 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1379 | || entsize == sizeof (Elf_External_Rela)); | |
1380 | ||
5ad8645c AM |
1381 | if (dynamic) |
1382 | symcount = bfd_get_dynamic_symcount (abfd); | |
1383 | else | |
1384 | symcount = bfd_get_symcount (abfd); | |
1385 | ||
252b5132 RH |
1386 | for (i = 0, relent = relents; |
1387 | i < reloc_count; | |
1388 | i++, relent++, native_relocs += entsize) | |
1389 | { | |
1390 | Elf_Internal_Rela rela; | |
252b5132 RH |
1391 | |
1392 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1393 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1394 | else |
947216bf | 1395 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1396 | |
1397 | /* The address of an ELF reloc is section relative for an object | |
1398 | file, and absolute for an executable file or shared library. | |
1399 | The address of a normal BFD reloc is always section relative, | |
1400 | and the address of a dynamic reloc is absolute.. */ | |
1401 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1402 | relent->address = rela.r_offset; | |
1403 | else | |
1404 | relent->address = rela.r_offset - asect->vma; | |
1405 | ||
1406 | if (ELF_R_SYM (rela.r_info) == 0) | |
1407 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1408 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1409 | { |
1410 | (*_bfd_error_handler) | |
1411 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1412 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1413 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1414 | } | |
252b5132 RH |
1415 | else |
1416 | { | |
b48c61bc | 1417 | asymbol **ps; |
28c9d252 | 1418 | |
252b5132 | 1419 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1420 | |
f9cfae62 | 1421 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1422 | } |
1423 | ||
1424 | relent->addend = rela.r_addend; | |
1425 | ||
90fff0d4 DJ |
1426 | if ((entsize == sizeof (Elf_External_Rela) |
1427 | && ebd->elf_info_to_howto != NULL) | |
1428 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1429 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1430 | else | |
947216bf | 1431 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1432 | } |
1433 | ||
252b5132 RH |
1434 | if (allocated != NULL) |
1435 | free (allocated); | |
1436 | ||
b34976b6 | 1437 | return TRUE; |
252b5132 RH |
1438 | |
1439 | error_return: | |
1440 | if (allocated != NULL) | |
1441 | free (allocated); | |
b34976b6 | 1442 | return FALSE; |
252b5132 RH |
1443 | } |
1444 | ||
42fdc509 MM |
1445 | /* Read in and swap the external relocs. */ |
1446 | ||
b34976b6 | 1447 | bfd_boolean |
268b6b39 AM |
1448 | elf_slurp_reloc_table (bfd *abfd, |
1449 | asection *asect, | |
1450 | asymbol **symbols, | |
1451 | bfd_boolean dynamic) | |
42fdc509 MM |
1452 | { |
1453 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1454 | Elf_Internal_Shdr *rel_hdr; | |
1455 | Elf_Internal_Shdr *rel_hdr2; | |
1456 | bfd_size_type reloc_count; | |
1457 | bfd_size_type reloc_count2; | |
1458 | arelent *relents; | |
dc810e39 | 1459 | bfd_size_type amt; |
42fdc509 MM |
1460 | |
1461 | if (asect->relocation != NULL) | |
b34976b6 | 1462 | return TRUE; |
42fdc509 MM |
1463 | |
1464 | if (! dynamic) | |
1465 | { | |
1466 | if ((asect->flags & SEC_RELOC) == 0 | |
1467 | || asect->reloc_count == 0) | |
b34976b6 | 1468 | return TRUE; |
42fdc509 MM |
1469 | |
1470 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1471 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1472 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1473 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1474 | |
1475 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1476 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1477 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1478 | ||
1479 | } | |
1480 | else | |
1481 | { | |
57e21bef MM |
1482 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1483 | case because relocations against this section may use the | |
1484 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1485 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1486 | if (asect->size == 0) |
b34976b6 | 1487 | return TRUE; |
42fdc509 MM |
1488 | |
1489 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1490 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1491 | rel_hdr2 = NULL; |
57e21bef | 1492 | reloc_count2 = 0; |
42fdc509 MM |
1493 | } |
1494 | ||
dc810e39 | 1495 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
268b6b39 | 1496 | relents = bfd_alloc (abfd, amt); |
42fdc509 | 1497 | if (relents == NULL) |
b34976b6 | 1498 | return FALSE; |
42fdc509 MM |
1499 | |
1500 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1501 | rel_hdr, reloc_count, | |
1502 | relents, | |
1503 | symbols, dynamic)) | |
b34976b6 | 1504 | return FALSE; |
60bcf0fa NC |
1505 | |
1506 | if (rel_hdr2 | |
42fdc509 MM |
1507 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1508 | rel_hdr2, reloc_count2, | |
1509 | relents + reloc_count, | |
1510 | symbols, dynamic)) | |
b34976b6 | 1511 | return FALSE; |
42fdc509 | 1512 | |
42fdc509 | 1513 | asect->relocation = relents; |
b34976b6 | 1514 | return TRUE; |
42fdc509 MM |
1515 | } |
1516 | ||
e460dd0d | 1517 | #if DEBUG & 2 |
252b5132 | 1518 | static void |
268b6b39 | 1519 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1520 | { |
1521 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1522 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1523 | (long) hdr); | |
1524 | fprintf (stderr, | |
1525 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1526 | (long) hdr->sh_name, | |
1527 | (long) hdr->sh_type, | |
1528 | (long) hdr->sh_flags); | |
1529 | fprintf (stderr, | |
1530 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1531 | (long) hdr->sh_addr, | |
1532 | (long) hdr->sh_offset, | |
1533 | (long) hdr->sh_size); | |
1534 | fprintf (stderr, | |
1535 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1536 | (long) hdr->sh_link, | |
1537 | (long) hdr->sh_info, | |
1538 | (long) hdr->sh_addralign); | |
1539 | fprintf (stderr, "sh_entsize = %ld\n", | |
1540 | (long) hdr->sh_entsize); | |
1541 | fflush (stderr); | |
1542 | } | |
e460dd0d | 1543 | #endif |
252b5132 | 1544 | |
e460dd0d | 1545 | #if DEBUG & 1 |
252b5132 | 1546 | static void |
268b6b39 | 1547 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1548 | { |
1549 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1550 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1551 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1552 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1553 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1554 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1555 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1556 | } | |
252b5132 RH |
1557 | #endif |
1558 | \f | |
8d6337fe RM |
1559 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1560 | reconstruct an ELF file by reading the segments out of remote memory | |
1561 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1562 | points to. If not null, *LOADBASEP is filled in with the difference | |
1563 | between the VMAs from which the segments were read, and the VMAs the | |
1564 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1565 | ||
1566 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1567 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1568 | should return zero on success or an `errno' code on failure. TEMPL must | |
1569 | be a BFD for a target with the word size and byte order found in the | |
1570 | remote memory. */ | |
1571 | ||
1572 | bfd * | |
268b6b39 AM |
1573 | NAME(_bfd_elf,bfd_from_remote_memory) |
1574 | (bfd *templ, | |
1575 | bfd_vma ehdr_vma, | |
1576 | bfd_vma *loadbasep, | |
f075ee0c | 1577 | int (*target_read_memory) (bfd_vma, bfd_byte *, int)) |
8d6337fe RM |
1578 | { |
1579 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1580 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1581 | Elf_External_Phdr *x_phdrs; | |
1582 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1583 | bfd *nbfd; | |
1584 | struct bfd_in_memory *bim; | |
1585 | int contents_size; | |
f075ee0c | 1586 | bfd_byte *contents; |
8d6337fe RM |
1587 | int err; |
1588 | unsigned int i; | |
1589 | bfd_vma loadbase; | |
1590 | ||
1591 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1592 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1593 | if (err) |
1594 | { | |
1595 | bfd_set_error (bfd_error_system_call); | |
1596 | errno = err; | |
1597 | return NULL; | |
1598 | } | |
1599 | ||
1600 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1601 | make use of. The magic number must match, the address size ('class') | |
1602 | and byte-swapping must match our XVEC entry. */ | |
1603 | ||
1604 | if (! elf_file_p (&x_ehdr) | |
1605 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1606 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1607 | { | |
1608 | bfd_set_error (bfd_error_wrong_format); | |
1609 | return NULL; | |
1610 | } | |
1611 | ||
1612 | /* Check that file's byte order matches xvec's */ | |
1613 | switch (x_ehdr.e_ident[EI_DATA]) | |
1614 | { | |
1615 | case ELFDATA2MSB: /* Big-endian */ | |
1616 | if (! bfd_header_big_endian (templ)) | |
1617 | { | |
1618 | bfd_set_error (bfd_error_wrong_format); | |
1619 | return NULL; | |
1620 | } | |
1621 | break; | |
1622 | case ELFDATA2LSB: /* Little-endian */ | |
1623 | if (! bfd_header_little_endian (templ)) | |
1624 | { | |
1625 | bfd_set_error (bfd_error_wrong_format); | |
1626 | return NULL; | |
1627 | } | |
1628 | break; | |
1629 | case ELFDATANONE: /* No data encoding specified */ | |
1630 | default: /* Unknown data encoding specified */ | |
1631 | bfd_set_error (bfd_error_wrong_format); | |
1632 | return NULL; | |
1633 | } | |
1634 | ||
1635 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1636 | ||
1637 | /* The file header tells where to find the program headers. | |
1638 | These are what we use to actually choose what to read. */ | |
1639 | ||
1640 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1641 | { | |
1642 | bfd_set_error (bfd_error_wrong_format); | |
1643 | return NULL; | |
1644 | } | |
1645 | ||
268b6b39 | 1646 | x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); |
8d6337fe RM |
1647 | if (x_phdrs == NULL) |
1648 | { | |
1649 | bfd_set_error (bfd_error_no_memory); | |
1650 | return NULL; | |
1651 | } | |
f075ee0c | 1652 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1653 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1654 | if (err) | |
1655 | { | |
1656 | free (x_phdrs); | |
1657 | bfd_set_error (bfd_error_system_call); | |
1658 | errno = err; | |
1659 | return NULL; | |
1660 | } | |
1661 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1662 | ||
1663 | contents_size = 0; | |
1664 | last_phdr = NULL; | |
1665 | loadbase = ehdr_vma; | |
1666 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1667 | { | |
1668 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
653bb2de JW |
1669 | /* IA-64 vDSO may have two mappings for one segment, where one mapping |
1670 | is executable only, and one is read only. We must not use the | |
1671 | executable one. */ | |
1672 | if (i_phdrs[i].p_type == PT_LOAD && (i_phdrs[i].p_flags & PF_R)) | |
8d6337fe RM |
1673 | { |
1674 | bfd_vma segment_end; | |
1675 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1676 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1677 | if (segment_end > (bfd_vma) contents_size) | |
1678 | contents_size = segment_end; | |
1679 | ||
1680 | if ((i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1681 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1682 | ||
1683 | last_phdr = &i_phdrs[i]; | |
1684 | } | |
1685 | } | |
1686 | if (last_phdr == NULL) | |
1687 | { | |
1688 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1689 | free (x_phdrs); | |
1690 | bfd_set_error (bfd_error_wrong_format); | |
1691 | return NULL; | |
1692 | } | |
1693 | ||
1694 | /* Trim the last segment so we don't bother with zeros in the last page | |
1695 | that are off the end of the file. However, if the extra bit in that | |
1696 | page includes the section headers, keep them. */ | |
1697 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1698 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1699 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1700 | { | |
1701 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1702 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1703 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1704 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1705 | } | |
1706 | else | |
1707 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1708 | ||
1709 | /* Now we know the size of the whole image we want read in. */ | |
268b6b39 | 1710 | contents = bfd_zmalloc (contents_size); |
8d6337fe RM |
1711 | if (contents == NULL) |
1712 | { | |
1713 | free (x_phdrs); | |
1714 | bfd_set_error (bfd_error_no_memory); | |
1715 | return NULL; | |
1716 | } | |
1717 | ||
1718 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
653bb2de JW |
1719 | /* IA-64 vDSO may have two mappings for one segment, where one mapping |
1720 | is executable only, and one is read only. We must not use the | |
1721 | executable one. */ | |
1722 | if (i_phdrs[i].p_type == PT_LOAD && (i_phdrs[i].p_flags & PF_R)) | |
8d6337fe RM |
1723 | { |
1724 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1725 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1726 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1727 | if (end > (bfd_vma) contents_size) | |
1728 | end = contents_size; | |
1729 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1730 | & -i_phdrs[i].p_align, | |
1731 | contents + start, end - start); | |
1732 | if (err) | |
1733 | { | |
1734 | free (x_phdrs); | |
1735 | free (contents); | |
1736 | bfd_set_error (bfd_error_system_call); | |
1737 | errno = err; | |
1738 | return NULL; | |
1739 | } | |
1740 | } | |
1741 | free (x_phdrs); | |
1742 | ||
1743 | /* If the segments visible in memory didn't include the section headers, | |
1744 | then clear them from the file header. */ | |
1745 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1746 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1747 | { | |
1748 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1749 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1750 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1751 | } | |
1752 | ||
1753 | /* This will normally have been in the first PT_LOAD segment. But it | |
1754 | conceivably could be missing, and we might have just changed it. */ | |
1755 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1756 | ||
1757 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
268b6b39 | 1758 | bim = bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1759 | if (bim == NULL) |
1760 | { | |
1761 | free (contents); | |
1762 | bfd_set_error (bfd_error_no_memory); | |
1763 | return NULL; | |
1764 | } | |
1765 | nbfd = _bfd_new_bfd (); | |
1766 | if (nbfd == NULL) | |
1767 | { | |
1768 | free (bim); | |
1769 | free (contents); | |
1770 | bfd_set_error (bfd_error_no_memory); | |
1771 | return NULL; | |
1772 | } | |
1773 | nbfd->filename = "<in-memory>"; | |
1774 | nbfd->xvec = templ->xvec; | |
1775 | bim->size = contents_size; | |
1776 | bim->buffer = contents; | |
268b6b39 | 1777 | nbfd->iostream = bim; |
8d6337fe RM |
1778 | nbfd->flags = BFD_IN_MEMORY; |
1779 | nbfd->direction = read_direction; | |
1780 | nbfd->mtime = time (NULL); | |
1781 | nbfd->mtime_set = TRUE; | |
1782 | ||
1783 | if (loadbasep) | |
1784 | *loadbasep = loadbase; | |
1785 | return nbfd; | |
1786 | } | |
1787 | \f | |
252b5132 | 1788 | #include "elfcore.h" |
252b5132 RH |
1789 | \f |
1790 | /* Size-dependent data and functions. */ | |
1791 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1792 | sizeof (Elf_External_Ehdr), | |
1793 | sizeof (Elf_External_Phdr), | |
1794 | sizeof (Elf_External_Shdr), | |
1795 | sizeof (Elf_External_Rel), | |
1796 | sizeof (Elf_External_Rela), | |
1797 | sizeof (Elf_External_Sym), | |
1798 | sizeof (Elf_External_Dyn), | |
1799 | sizeof (Elf_External_Note), | |
70bcb145 | 1800 | 4, |
c7ac6ff8 | 1801 | 1, |
45d6a902 | 1802 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1803 | ELFCLASS, EV_CURRENT, |
1804 | elf_write_out_phdrs, | |
1805 | elf_write_shdrs_and_ehdr, | |
b9f66672 | 1806 | elf_write_relocs, |
73ff0d56 | 1807 | elf_swap_symbol_in, |
252b5132 RH |
1808 | elf_swap_symbol_out, |
1809 | elf_slurp_reloc_table, | |
1810 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1811 | elf_swap_dyn_in, |
1812 | elf_swap_dyn_out, | |
947216bf AM |
1813 | elf_swap_reloc_in, |
1814 | elf_swap_reloc_out, | |
1815 | elf_swap_reloca_in, | |
1816 | elf_swap_reloca_out | |
252b5132 | 1817 | }; |