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252b5132 | 1 | /* ELF executable support for BFD. |
7898deda | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
cb33740c | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
3db64b00 | 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) | |
d94838b1 | 125 | #define elf_checksum_contents NAME(bfd_elf,checksum_contents) |
b9f66672 JL |
126 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
127 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
128 | |
129 | #if ARCH_SIZE == 64 | |
130 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
131 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
132 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
133 | #define ELFCLASS ELFCLASS64 | |
134 | #define FILE_ALIGN 8 | |
135 | #define LOG_FILE_ALIGN 3 | |
136 | #endif | |
137 | #if ARCH_SIZE == 32 | |
138 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
139 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
140 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
141 | #define ELFCLASS ELFCLASS32 | |
142 | #define FILE_ALIGN 4 | |
143 | #define LOG_FILE_ALIGN 2 | |
144 | #endif | |
145 | ||
e460dd0d | 146 | #if DEBUG & 2 |
268b6b39 | 147 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
e460dd0d AM |
148 | #endif |
149 | #if DEBUG & 1 | |
268b6b39 | 150 | static void elf_debug_file (Elf_Internal_Ehdr *); |
252b5132 RH |
151 | #endif |
152 | \f | |
153 | /* Structure swapping routines */ | |
154 | ||
155 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
156 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
157 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
158 | #define H_PUT_WORD H_PUT_64 |
159 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
160 | #define H_GET_WORD H_GET_64 | |
161 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
162 | #endif |
163 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
164 | #define H_PUT_WORD H_PUT_32 |
165 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
166 | #define H_GET_WORD H_GET_32 | |
167 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
168 | #endif |
169 | ||
170 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 171 | format. */ |
252b5132 | 172 | |
8384fb8f | 173 | bfd_boolean |
268b6b39 AM |
174 | elf_swap_symbol_in (bfd *abfd, |
175 | const void *psrc, | |
176 | const void *pshn, | |
177 | Elf_Internal_Sym *dst) | |
252b5132 | 178 | { |
268b6b39 AM |
179 | const Elf_External_Sym *src = psrc; |
180 | const Elf_External_Sym_Shndx *shndx = pshn; | |
86dc0f79 RH |
181 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
182 | ||
dc810e39 | 183 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 184 | if (signed_vma) |
dc810e39 | 185 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 186 | else |
dc810e39 AM |
187 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
188 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
189 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
190 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
191 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
4fbb74a6 | 192 | if (dst->st_shndx == (SHN_XINDEX & 0xffff)) |
9ad5cbcf AM |
193 | { |
194 | if (shndx == NULL) | |
8384fb8f | 195 | return FALSE; |
9ad5cbcf AM |
196 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); |
197 | } | |
4fbb74a6 AM |
198 | else if (dst->st_shndx >= (SHN_LORESERVE & 0xffff)) |
199 | dst->st_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff); | |
8384fb8f | 200 | return TRUE; |
252b5132 RH |
201 | } |
202 | ||
203 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 204 | format. */ |
252b5132 RH |
205 | |
206 | void | |
268b6b39 AM |
207 | elf_swap_symbol_out (bfd *abfd, |
208 | const Elf_Internal_Sym *src, | |
209 | void *cdst, | |
210 | void *shndx) | |
252b5132 | 211 | { |
9ad5cbcf | 212 | unsigned int tmp; |
268b6b39 | 213 | Elf_External_Sym *dst = cdst; |
dc810e39 AM |
214 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
215 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
216 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
217 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
218 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf | 219 | tmp = src->st_shndx; |
4fbb74a6 | 220 | if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE) |
9ad5cbcf AM |
221 | { |
222 | if (shndx == NULL) | |
223 | abort (); | |
224 | H_PUT_32 (abfd, tmp, shndx); | |
4fbb74a6 | 225 | tmp = SHN_XINDEX & 0xffff; |
9ad5cbcf AM |
226 | } |
227 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
228 | } |
229 | ||
252b5132 | 230 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 231 | internal format. */ |
252b5132 RH |
232 | |
233 | static void | |
268b6b39 AM |
234 | elf_swap_ehdr_in (bfd *abfd, |
235 | const Elf_External_Ehdr *src, | |
236 | Elf_Internal_Ehdr *dst) | |
252b5132 | 237 | { |
448cafa4 | 238 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 239 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
240 | dst->e_type = H_GET_16 (abfd, src->e_type); |
241 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
242 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 243 | if (signed_vma) |
dc810e39 | 244 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 245 | else |
dc810e39 AM |
246 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
247 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
248 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
249 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
250 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
251 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
252 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
253 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
254 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
255 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
256 | } |
257 | ||
258 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 259 | external format. */ |
252b5132 RH |
260 | |
261 | static void | |
268b6b39 AM |
262 | elf_swap_ehdr_out (bfd *abfd, |
263 | const Elf_Internal_Ehdr *src, | |
264 | Elf_External_Ehdr *dst) | |
252b5132 | 265 | { |
5732c114 | 266 | unsigned int tmp; |
448cafa4 | 267 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 268 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 269 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
270 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
271 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
272 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 273 | if (signed_vma) |
dc810e39 | 274 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 275 | else |
dc810e39 AM |
276 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
277 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
278 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
279 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
280 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
281 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
282 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
283 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 | 284 | tmp = src->e_shnum; |
4fbb74a6 | 285 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
286 | tmp = SHN_UNDEF; |
287 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
288 | tmp = src->e_shstrndx; | |
4fbb74a6 AM |
289 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
290 | tmp = SHN_XINDEX & 0xffff; | |
5732c114 | 291 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); |
252b5132 RH |
292 | } |
293 | ||
252b5132 | 294 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 295 | ELF section header table entry in internal format. */ |
252b5132 RH |
296 | |
297 | static void | |
268b6b39 AM |
298 | elf_swap_shdr_in (bfd *abfd, |
299 | const Elf_External_Shdr *src, | |
300 | Elf_Internal_Shdr *dst) | |
252b5132 | 301 | { |
86dc0f79 RH |
302 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
303 | ||
dc810e39 AM |
304 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
305 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
306 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 307 | if (signed_vma) |
dc810e39 | 308 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 309 | else |
dc810e39 AM |
310 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
311 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
312 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
313 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
314 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
315 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
316 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
317 | dst->bfd_section = NULL; |
318 | dst->contents = NULL; | |
319 | } | |
320 | ||
321 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 322 | ELF section header table entry in external format. */ |
252b5132 RH |
323 | |
324 | static void | |
268b6b39 AM |
325 | elf_swap_shdr_out (bfd *abfd, |
326 | const Elf_Internal_Shdr *src, | |
327 | Elf_External_Shdr *dst) | |
252b5132 | 328 | { |
3e932841 | 329 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
330 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
331 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
332 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
333 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
334 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
335 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
336 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
337 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
338 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
339 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
340 | } |
341 | ||
252b5132 | 342 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 343 | ELF program header table entry in internal format. */ |
252b5132 RH |
344 | |
345 | void | |
268b6b39 AM |
346 | elf_swap_phdr_in (bfd *abfd, |
347 | const Elf_External_Phdr *src, | |
348 | Elf_Internal_Phdr *dst) | |
252b5132 | 349 | { |
86dc0f79 RH |
350 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
351 | ||
dc810e39 AM |
352 | dst->p_type = H_GET_32 (abfd, src->p_type); |
353 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
354 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
355 | if (signed_vma) |
356 | { | |
dc810e39 AM |
357 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
358 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
359 | } |
360 | else | |
361 | { | |
dc810e39 AM |
362 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
363 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 364 | } |
dc810e39 AM |
365 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
366 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
367 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
368 | } |
369 | ||
370 | void | |
268b6b39 AM |
371 | elf_swap_phdr_out (bfd *abfd, |
372 | const Elf_Internal_Phdr *src, | |
373 | Elf_External_Phdr *dst) | |
252b5132 | 374 | { |
147d51c2 L |
375 | const struct elf_backend_data *bed; |
376 | bfd_vma p_paddr; | |
377 | ||
378 | bed = get_elf_backend_data (abfd); | |
379 | p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr; | |
380 | ||
3e932841 | 381 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
382 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
383 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
384 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
147d51c2 | 385 | H_PUT_WORD (abfd, p_paddr, dst->p_paddr); |
dc810e39 AM |
386 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); |
387 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
388 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
389 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
390 | } |
391 | ||
3e932841 | 392 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 393 | void |
268b6b39 AM |
394 | elf_swap_reloc_in (bfd *abfd, |
395 | const bfd_byte *s, | |
396 | Elf_Internal_Rela *dst) | |
252b5132 | 397 | { |
947216bf | 398 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
399 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
400 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 401 | dst->r_addend = 0; |
252b5132 RH |
402 | } |
403 | ||
947216bf | 404 | void |
268b6b39 AM |
405 | elf_swap_reloca_in (bfd *abfd, |
406 | const bfd_byte *s, | |
407 | Elf_Internal_Rela *dst) | |
252b5132 | 408 | { |
947216bf | 409 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
410 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
411 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
412 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
413 | } |
414 | ||
3e932841 | 415 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 416 | void |
268b6b39 AM |
417 | elf_swap_reloc_out (bfd *abfd, |
418 | const Elf_Internal_Rela *src, | |
419 | bfd_byte *d) | |
252b5132 | 420 | { |
947216bf | 421 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
422 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
423 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
424 | } |
425 | ||
947216bf | 426 | void |
268b6b39 AM |
427 | elf_swap_reloca_out (bfd *abfd, |
428 | const Elf_Internal_Rela *src, | |
429 | bfd_byte *d) | |
252b5132 | 430 | { |
947216bf | 431 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
432 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
433 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
434 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
435 | } |
436 | ||
268b6b39 AM |
437 | void |
438 | elf_swap_dyn_in (bfd *abfd, | |
439 | const void *p, | |
440 | Elf_Internal_Dyn *dst) | |
252b5132 | 441 | { |
268b6b39 | 442 | const Elf_External_Dyn *src = p; |
252b5132 | 443 | |
dc810e39 AM |
444 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
445 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
446 | } |
447 | ||
268b6b39 AM |
448 | void |
449 | elf_swap_dyn_out (bfd *abfd, | |
450 | const Elf_Internal_Dyn *src, | |
451 | void *p) | |
252b5132 | 452 | { |
268b6b39 | 453 | Elf_External_Dyn *dst = p; |
c7ac6ff8 | 454 | |
dc810e39 AM |
455 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
456 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
457 | } |
458 | \f | |
459 | /* ELF .o/exec file reading */ | |
460 | ||
252b5132 RH |
461 | /* Begin processing a given object. |
462 | ||
463 | First we validate the file by reading in the ELF header and checking | |
464 | the magic number. */ | |
465 | ||
268b6b39 AM |
466 | static inline bfd_boolean |
467 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
468 | { |
469 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
470 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
471 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
472 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
473 | } | |
474 | ||
475 | /* Check to see if the file associated with ABFD matches the target vector | |
476 | that ABFD points to. | |
477 | ||
478 | Note that we may be called several times with the same ABFD, but different | |
479 | target vectors, most of which will not match. We have to avoid leaving | |
480 | any side effects in ABFD, or any data it points to (like tdata), if the | |
481 | file does not match the target vector. */ | |
482 | ||
483 | const bfd_target * | |
268b6b39 | 484 | elf_object_p (bfd *abfd) |
252b5132 RH |
485 | { |
486 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
487 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
488 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 489 | Elf_Internal_Shdr i_shdr; |
ed591155 | 490 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 491 | unsigned int shindex; |
9c5bfbb7 | 492 | const struct elf_backend_data *ebd; |
ed591155 | 493 | struct bfd_preserve preserve; |
252b5132 | 494 | asection *s; |
dc810e39 | 495 | bfd_size_type amt; |
d1036acb L |
496 | const bfd_target *target; |
497 | const bfd_target * const *target_ptr; | |
252b5132 | 498 | |
e84d6fca | 499 | preserve.marker = NULL; |
a17cc40f | 500 | |
252b5132 RH |
501 | /* Read in the ELF header in external format. */ |
502 | ||
268b6b39 | 503 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
504 | { |
505 | if (bfd_get_error () != bfd_error_system_call) | |
506 | goto got_wrong_format_error; | |
507 | else | |
508 | goto got_no_match; | |
509 | } | |
510 | ||
511 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
512 | make use of. The magic number must match, the address size ('class') | |
513 | and byte-swapping must match our XVEC entry, and it must have a | |
514 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 515 | file). */ |
252b5132 | 516 | |
82e51918 AM |
517 | if (! elf_file_p (&x_ehdr) |
518 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
519 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
520 | goto got_wrong_format_error; |
521 | ||
522 | /* Check that file's byte order matches xvec's */ | |
523 | switch (x_ehdr.e_ident[EI_DATA]) | |
524 | { | |
525 | case ELFDATA2MSB: /* Big-endian */ | |
526 | if (! bfd_header_big_endian (abfd)) | |
527 | goto got_wrong_format_error; | |
528 | break; | |
529 | case ELFDATA2LSB: /* Little-endian */ | |
530 | if (! bfd_header_little_endian (abfd)) | |
531 | goto got_wrong_format_error; | |
532 | break; | |
533 | case ELFDATANONE: /* No data encoding specified */ | |
534 | default: /* Unknown data encoding specified */ | |
535 | goto got_wrong_format_error; | |
536 | } | |
537 | ||
0c83546a AM |
538 | if (!bfd_preserve_save (abfd, &preserve)) |
539 | goto got_no_match; | |
540 | ||
d1036acb L |
541 | target = abfd->xvec; |
542 | ||
252b5132 RH |
543 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
544 | the tdata pointer in the bfd. */ | |
545 | ||
d1036acb | 546 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 547 | goto got_no_match; |
0c83546a | 548 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 549 | |
252b5132 RH |
550 | /* Now that we know the byte order, swap in the rest of the header */ |
551 | i_ehdrp = elf_elfheader (abfd); | |
552 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
553 | #if DEBUG & 1 | |
554 | elf_debug_file (i_ehdrp); | |
555 | #endif | |
556 | ||
557 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
558 | if (i_ehdrp->e_type == ET_CORE) | |
559 | goto got_wrong_format_error; | |
560 | ||
0c35f01a AM |
561 | /* If this is a relocatable file and there is no section header |
562 | table, then we're hosed. */ | |
563 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
564 | goto got_wrong_format_error; |
565 | ||
e460dd0d | 566 | /* As a simple sanity check, verify that what BFD thinks is the |
252b5132 | 567 | size of each section header table entry actually matches the size |
0c35f01a AM |
568 | recorded in the file, but only if there are any sections. */ |
569 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
570 | goto got_wrong_format_error; |
571 | ||
7ece0d85 JJ |
572 | /* Further sanity check. */ |
573 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
574 | goto got_wrong_format_error; | |
575 | ||
252b5132 | 576 | ebd = get_elf_backend_data (abfd); |
11a7ae4f AM |
577 | if (ebd->s->arch_size != ARCH_SIZE) |
578 | goto got_wrong_format_error; | |
252b5132 RH |
579 | |
580 | /* Check that the ELF e_machine field matches what this particular | |
581 | BFD format expects. */ | |
582 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
583 | && (ebd->elf_machine_alt1 == 0 |
584 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
585 | && (ebd->elf_machine_alt2 == 0 | |
586 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 | 587 | { |
252b5132 RH |
588 | if (ebd->elf_machine_code != EM_NONE) |
589 | goto got_wrong_format_error; | |
590 | ||
591 | /* This is the generic ELF target. Let it match any ELF target | |
592 | for which we do not have a specific backend. */ | |
593 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
594 | { | |
9c5bfbb7 | 595 | const struct elf_backend_data *back; |
252b5132 RH |
596 | |
597 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
598 | continue; | |
f7231afc | 599 | back = xvec_get_elf_backend_data (*target_ptr); |
11a7ae4f AM |
600 | if (back->s->arch_size != ARCH_SIZE) |
601 | continue; | |
252b5132 RH |
602 | if (back->elf_machine_code == i_ehdrp->e_machine |
603 | || (back->elf_machine_alt1 != 0 | |
604 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
605 | || (back->elf_machine_alt2 != 0 | |
606 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
607 | { | |
608 | /* target_ptr is an ELF backend which matches this | |
609 | object file, so reject the generic ELF target. */ | |
610 | goto got_wrong_format_error; | |
611 | } | |
612 | } | |
613 | } | |
614 | ||
615 | if (i_ehdrp->e_type == ET_EXEC) | |
616 | abfd->flags |= EXEC_P; | |
617 | else if (i_ehdrp->e_type == ET_DYN) | |
618 | abfd->flags |= DYNAMIC; | |
619 | ||
620 | if (i_ehdrp->e_phnum > 0) | |
621 | abfd->flags |= D_PAGED; | |
622 | ||
623 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
624 | { | |
625 | /* It's OK if this fails for the generic target. */ | |
626 | if (ebd->elf_machine_code != EM_NONE) | |
627 | goto got_no_match; | |
628 | } | |
629 | ||
d1036acb L |
630 | if (ebd->elf_machine_code != EM_NONE |
631 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi) | |
632 | { | |
633 | if (ebd->elf_osabi != ELFOSABI_NONE) | |
634 | goto got_wrong_format_error; | |
635 | ||
636 | /* This is an ELFOSABI_NONE ELF target. Let it match any ELF | |
637 | target of the compatible machine for which we do not have a | |
638 | backend with matching ELFOSABI. */ | |
639 | for (target_ptr = bfd_target_vector; | |
640 | *target_ptr != NULL; | |
641 | target_ptr++) | |
642 | { | |
643 | const struct elf_backend_data *back; | |
644 | ||
645 | /* Skip this target and targets with incompatible byte | |
646 | order. */ | |
647 | if (*target_ptr == target | |
648 | || (*target_ptr)->flavour != bfd_target_elf_flavour | |
649 | || (*target_ptr)->byteorder != target->byteorder | |
650 | || ((*target_ptr)->header_byteorder | |
651 | != target->header_byteorder)) | |
652 | continue; | |
653 | ||
f7231afc | 654 | back = xvec_get_elf_backend_data (*target_ptr); |
d1036acb L |
655 | if (back->elf_osabi == i_ehdrp->e_ident[EI_OSABI] |
656 | && (back->elf_machine_code == i_ehdrp->e_machine | |
657 | || (back->elf_machine_alt1 != 0 | |
658 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
659 | || (back->elf_machine_alt2 != 0 | |
660 | && back->elf_machine_alt2 == i_ehdrp->e_machine))) | |
661 | { | |
662 | /* target_ptr is an ELF backend which matches this | |
663 | object file, so reject the ELFOSABI_NONE ELF target. */ | |
664 | goto got_wrong_format_error; | |
665 | } | |
666 | } | |
667 | } | |
668 | ||
7ece0d85 JJ |
669 | if (i_ehdrp->e_shoff != 0) |
670 | { | |
0560d0f7 AM |
671 | bfd_signed_vma where = i_ehdrp->e_shoff; |
672 | ||
673 | if (where != (file_ptr) where) | |
674 | goto got_wrong_format_error; | |
675 | ||
7ece0d85 | 676 | /* Seek to the section header table in the file. */ |
0560d0f7 | 677 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) |
7ece0d85 | 678 | goto got_no_match; |
5732c114 | 679 | |
7ece0d85 JJ |
680 | /* Read the first section header at index 0, and convert to internal |
681 | form. */ | |
268b6b39 | 682 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
683 | goto got_no_match; |
684 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 685 | |
7ece0d85 JJ |
686 | /* If the section count is zero, the actual count is in the first |
687 | section header. */ | |
688 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
689 | { |
690 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
24639c7d JJ |
691 | if (i_ehdrp->e_shnum != i_shdr.sh_size |
692 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
693 | goto got_wrong_format_error; |
694 | } | |
5732c114 | 695 | |
7ece0d85 | 696 | /* And similarly for the string table index. */ |
4fbb74a6 | 697 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
698 | { |
699 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
700 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
701 | goto got_wrong_format_error; | |
702 | } | |
703 | ||
704 | /* Sanity check that we can read all of the section headers. | |
705 | It ought to be good enough to just read the last one. */ | |
706 | if (i_ehdrp->e_shnum != 1) | |
707 | { | |
708 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
709 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
710 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
711 | goto got_wrong_format_error; |
712 | ||
713 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
714 | if (where != (file_ptr) where) | |
715 | goto got_wrong_format_error; | |
716 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) | |
717 | goto got_wrong_format_error; | |
718 | ||
719 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
720 | goto got_no_match; | |
721 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
722 | goto got_no_match; | |
723 | ||
724 | /* Back to where we were. */ | |
725 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
726 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
727 | goto got_no_match; | |
728 | } | |
7ece0d85 | 729 | } |
5732c114 | 730 | |
252b5132 | 731 | /* Allocate space for a copy of the section header table in |
5732c114 | 732 | internal form. */ |
0c35f01a AM |
733 | if (i_ehdrp->e_shnum != 0) |
734 | { | |
5732c114 | 735 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 736 | unsigned int num_sec; |
5732c114 | 737 | |
0c35f01a | 738 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
268b6b39 | 739 | i_shdrp = bfd_alloc (abfd, amt); |
5732c114 AM |
740 | if (!i_shdrp) |
741 | goto got_no_match; | |
9ad5cbcf | 742 | num_sec = i_ehdrp->e_shnum; |
9ad5cbcf AM |
743 | elf_numsections (abfd) = num_sec; |
744 | amt = sizeof (i_shdrp) * num_sec; | |
268b6b39 | 745 | elf_elfsections (abfd) = bfd_alloc (abfd, amt); |
5732c114 | 746 | if (!elf_elfsections (abfd)) |
0c35f01a | 747 | goto got_no_match; |
5732c114 AM |
748 | |
749 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
4fbb74a6 | 750 | for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++) |
5732c114 | 751 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 752 | |
ed591155 AM |
753 | /* Read in the rest of the section header table and convert it |
754 | to internal form. */ | |
755 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
756 | { | |
268b6b39 | 757 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
758 | goto got_no_match; |
759 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
760 | ||
24639c7d | 761 | /* Sanity check sh_link and sh_info. */ |
4fbb74a6 | 762 | if (i_shdrp[shindex].sh_link >= num_sec) |
24639c7d JJ |
763 | goto got_wrong_format_error; |
764 | ||
765 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
766 | || i_shdrp[shindex].sh_type == SHT_RELA | |
767 | || i_shdrp[shindex].sh_type == SHT_REL) | |
4fbb74a6 | 768 | && i_shdrp[shindex].sh_info >= num_sec) |
24639c7d JJ |
769 | goto got_wrong_format_error; |
770 | ||
ed591155 AM |
771 | /* If the section is loaded, but not page aligned, clear |
772 | D_PAGED. */ | |
773 | if (i_shdrp[shindex].sh_size != 0 | |
774 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
775 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
776 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 777 | % ebd->minpagesize) |
ed591155 AM |
778 | != 0)) |
779 | abfd->flags &= ~D_PAGED; | |
780 | } | |
252b5132 | 781 | } |
ed591155 | 782 | |
24639c7d JJ |
783 | /* A further sanity check. */ |
784 | if (i_ehdrp->e_shnum != 0) | |
785 | { | |
4fbb74a6 | 786 | if (i_ehdrp->e_shstrndx >= elf_numsections (abfd)) |
0b49d371 NC |
787 | { |
788 | /* PR 2257: | |
789 | We used to just goto got_wrong_format_error here | |
790 | but there are binaries in existance for which this test | |
791 | will prevent the binutils from working with them at all. | |
792 | So we are kind, and reset the string index value to 0 | |
793 | so that at least some processing can be done. */ | |
794 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
795 | _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename); | |
796 | } | |
24639c7d | 797 | } |
0b49d371 | 798 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
799 | goto got_wrong_format_error; |
800 | ||
252b5132 RH |
801 | /* Read in the program headers. */ |
802 | if (i_ehdrp->e_phnum == 0) | |
803 | elf_tdata (abfd)->phdr = NULL; | |
804 | else | |
805 | { | |
806 | Elf_Internal_Phdr *i_phdr; | |
807 | unsigned int i; | |
808 | ||
dc810e39 | 809 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
268b6b39 | 810 | elf_tdata (abfd)->phdr = bfd_alloc (abfd, amt); |
252b5132 RH |
811 | if (elf_tdata (abfd)->phdr == NULL) |
812 | goto got_no_match; | |
dc810e39 | 813 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
814 | goto got_no_match; |
815 | i_phdr = elf_tdata (abfd)->phdr; | |
816 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
817 | { | |
818 | Elf_External_Phdr x_phdr; | |
819 | ||
268b6b39 | 820 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
821 | goto got_no_match; |
822 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
823 | } | |
824 | } | |
825 | ||
1b3a8575 | 826 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 827 | { |
9ad5cbcf AM |
828 | unsigned int num_sec; |
829 | ||
0c35f01a AM |
830 | /* Once all of the section headers have been read and converted, we |
831 | can start processing them. Note that the first section header is | |
832 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
833 | num_sec = elf_numsections (abfd); |
834 | for (shindex = 1; shindex < num_sec; shindex++) | |
4fbb74a6 AM |
835 | if (!bfd_section_from_shdr (abfd, shindex)) |
836 | goto got_no_match; | |
3d7f7666 | 837 | |
dd863624 L |
838 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
839 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 840 | goto got_wrong_format_error; |
252b5132 RH |
841 | } |
842 | ||
843 | /* Let the backend double check the format and override global | |
844 | information. */ | |
845 | if (ebd->elf_backend_object_p) | |
846 | { | |
82e51918 | 847 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
848 | goto got_wrong_format_error; |
849 | } | |
850 | ||
a14199db AM |
851 | /* Remember the entry point specified in the ELF file header. */ |
852 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
853 | ||
252b5132 RH |
854 | /* If we have created any reloc sections that are associated with |
855 | debugging sections, mark the reloc sections as debugging as well. */ | |
856 | for (s = abfd->sections; s != NULL; s = s->next) | |
857 | { | |
858 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
859 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
860 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
861 | { | |
862 | unsigned long targ_index; | |
863 | asection *targ_sec; | |
864 | ||
865 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
866 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
867 | if (targ_sec != NULL | |
868 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
869 | s->flags |= SEC_DEBUGGING; | |
870 | } | |
871 | } | |
872 | ||
e84d6fca | 873 | bfd_preserve_finish (abfd, &preserve); |
d1036acb | 874 | return target; |
252b5132 RH |
875 | |
876 | got_wrong_format_error: | |
a77a9fef HPN |
877 | /* There is way too much undoing of half-known state here. The caller, |
878 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
879 | check match/no-match like it does. We have to rely on that a call to | |
880 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
881 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
882 | For this to work, only elf-data and the mach may be changed by the | |
883 | target-specific elf_backend_object_p function. Note that saving the | |
884 | whole bfd here and restoring it would be even worse; the first thing | |
885 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 886 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 887 | |
252b5132 | 888 | got_no_match: |
e84d6fca AM |
889 | if (preserve.marker != NULL) |
890 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 891 | return NULL; |
252b5132 RH |
892 | } |
893 | \f | |
894 | /* ELF .o/exec file writing */ | |
895 | ||
896 | /* Write out the relocs. */ | |
897 | ||
b9f66672 | 898 | void |
268b6b39 | 899 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 900 | { |
268b6b39 | 901 | bfd_boolean *failedp = data; |
252b5132 | 902 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 903 | bfd_vma addr_offset; |
c39a58e6 | 904 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
905 | size_t extsize; |
906 | bfd_byte *dst_rela; | |
252b5132 | 907 | unsigned int idx; |
947216bf AM |
908 | asymbol *last_sym; |
909 | int last_sym_idx; | |
252b5132 RH |
910 | |
911 | /* If we have already failed, don't do anything. */ | |
912 | if (*failedp) | |
913 | return; | |
914 | ||
915 | if ((sec->flags & SEC_RELOC) == 0) | |
916 | return; | |
917 | ||
918 | /* The linker backend writes the relocs out itself, and sets the | |
919 | reloc_count field to zero to inhibit writing them here. Also, | |
920 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
921 | relocs. */ | |
922 | if (sec->reloc_count == 0) | |
923 | return; | |
924 | ||
9a44bbd9 DJ |
925 | /* If we have opened an existing file for update, reloc_count may be |
926 | set even though we are not linking. In that case we have nothing | |
927 | to do. */ | |
928 | if (sec->orelocation == NULL) | |
929 | return; | |
930 | ||
252b5132 RH |
931 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
932 | ||
933 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
268b6b39 | 934 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
935 | if (rela_hdr->contents == NULL) |
936 | { | |
b34976b6 | 937 | *failedp = TRUE; |
252b5132 RH |
938 | return; |
939 | } | |
940 | ||
bf572ba0 MM |
941 | /* Figure out whether the relocations are RELA or REL relocations. */ |
942 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
943 | { |
944 | swap_out = elf_swap_reloca_out; | |
945 | extsize = sizeof (Elf_External_Rela); | |
946 | } | |
bf572ba0 | 947 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
948 | { |
949 | swap_out = elf_swap_reloc_out; | |
950 | extsize = sizeof (Elf_External_Rel); | |
951 | } | |
bf572ba0 MM |
952 | else |
953 | /* Every relocation section should be either an SHT_RELA or an | |
954 | SHT_REL section. */ | |
955 | abort (); | |
956 | ||
947216bf AM |
957 | /* The address of an ELF reloc is section relative for an object |
958 | file, and absolute for an executable file or shared library. | |
959 | The address of a BFD reloc is always section relative. */ | |
960 | addr_offset = 0; | |
961 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
962 | addr_offset = sec->vma; | |
963 | ||
3e932841 | 964 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
965 | last_sym = 0; |
966 | last_sym_idx = 0; | |
967 | dst_rela = rela_hdr->contents; | |
252b5132 | 968 | |
947216bf AM |
969 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
970 | { | |
971 | Elf_Internal_Rela src_rela; | |
972 | arelent *ptr; | |
973 | asymbol *sym; | |
974 | int n; | |
975 | ||
976 | ptr = sec->orelocation[idx]; | |
977 | sym = *ptr->sym_ptr_ptr; | |
978 | if (sym == last_sym) | |
979 | n = last_sym_idx; | |
980 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
981 | n = STN_UNDEF; | |
982 | else | |
252b5132 | 983 | { |
947216bf AM |
984 | last_sym = sym; |
985 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
986 | if (n < 0) | |
252b5132 | 987 | { |
b34976b6 | 988 | *failedp = TRUE; |
252b5132 RH |
989 | return; |
990 | } | |
947216bf | 991 | last_sym_idx = n; |
252b5132 | 992 | } |
252b5132 | 993 | |
947216bf AM |
994 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
995 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
996 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 997 | { |
b34976b6 | 998 | *failedp = TRUE; |
947216bf | 999 | return; |
252b5132 | 1000 | } |
947216bf AM |
1001 | |
1002 | src_rela.r_offset = ptr->address + addr_offset; | |
1003 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
1004 | src_rela.r_addend = ptr->addend; | |
1005 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
1006 | } |
1007 | } | |
1008 | ||
1009 | /* Write out the program headers. */ | |
1010 | ||
1011 | int | |
268b6b39 AM |
1012 | elf_write_out_phdrs (bfd *abfd, |
1013 | const Elf_Internal_Phdr *phdr, | |
1014 | unsigned int count) | |
252b5132 RH |
1015 | { |
1016 | while (count--) | |
1017 | { | |
1018 | Elf_External_Phdr extphdr; | |
1019 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
1020 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1021 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1022 | return -1; |
1023 | phdr++; | |
1024 | } | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | /* Write out the section headers and the ELF file header. */ | |
1029 | ||
b34976b6 | 1030 | bfd_boolean |
268b6b39 | 1031 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1032 | { |
1033 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1034 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1035 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1036 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1037 | unsigned int count; | |
dc810e39 | 1038 | bfd_size_type amt; |
252b5132 RH |
1039 | |
1040 | i_ehdrp = elf_elfheader (abfd); | |
1041 | i_shdrp = elf_elfsections (abfd); | |
1042 | ||
3e932841 | 1043 | /* swap the header before spitting it out... */ |
252b5132 RH |
1044 | |
1045 | #if DEBUG & 1 | |
1046 | elf_debug_file (i_ehdrp); | |
1047 | #endif | |
1048 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1049 | amt = sizeof (x_ehdr); |
252b5132 | 1050 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1051 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1052 | return FALSE; |
252b5132 | 1053 | |
5732c114 AM |
1054 | /* Some fields in the first section header handle overflow of ehdr |
1055 | fields. */ | |
4fbb74a6 | 1056 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1057 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1058 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1059 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1060 | ||
3e932841 | 1061 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1062 | amt = i_ehdrp->e_shnum; |
1063 | amt *= sizeof (*x_shdrp); | |
268b6b39 | 1064 | x_shdrp = bfd_alloc (abfd, amt); |
252b5132 | 1065 | if (!x_shdrp) |
b34976b6 | 1066 | return FALSE; |
252b5132 | 1067 | |
5732c114 | 1068 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1069 | { |
1070 | #if DEBUG & 2 | |
5732c114 | 1071 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1072 | #endif |
5732c114 | 1073 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
252b5132 RH |
1074 | } |
1075 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 1076 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1077 | return FALSE; |
252b5132 | 1078 | |
3e932841 | 1079 | /* need to dump the string table too... */ |
252b5132 | 1080 | |
b34976b6 | 1081 | return TRUE; |
252b5132 RH |
1082 | } |
1083 | ||
d94838b1 RM |
1084 | bfd_boolean |
1085 | elf_checksum_contents (bfd *abfd, | |
1086 | void (*process) (const void *, size_t, void *), | |
1087 | void *arg) | |
1088 | { | |
1089 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1090 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1091 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1092 | unsigned int count, num; | |
1093 | ||
1094 | { | |
1095 | Elf_External_Ehdr x_ehdr; | |
1096 | Elf_Internal_Ehdr i_ehdr; | |
1097 | ||
1098 | i_ehdr = *i_ehdrp; | |
1099 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1100 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1101 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1102 | } | |
1103 | ||
1104 | num = i_ehdrp->e_phnum; | |
1105 | for (count = 0; count < num; count++) | |
1106 | { | |
1107 | Elf_External_Phdr x_phdr; | |
1108 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1109 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1110 | } | |
1111 | ||
1112 | num = elf_numsections (abfd); | |
1113 | for (count = 0; count < num; count++) | |
1114 | { | |
1115 | Elf_Internal_Shdr i_shdr; | |
1116 | Elf_External_Shdr x_shdr; | |
1117 | ||
1118 | i_shdr = *i_shdrp[count]; | |
1119 | i_shdr.sh_offset = 0; | |
1120 | ||
1121 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1122 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1123 | ||
1124 | if (i_shdr.contents) | |
1125 | (*process) (i_shdr.contents, i_shdr.sh_size, arg); | |
1126 | } | |
1127 | ||
1128 | return TRUE; | |
1129 | } | |
1130 | ||
252b5132 | 1131 | long |
268b6b39 | 1132 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1133 | { |
1134 | Elf_Internal_Shdr *hdr; | |
1135 | Elf_Internal_Shdr *verhdr; | |
1136 | unsigned long symcount; /* Number of external ELF symbols */ | |
1137 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1138 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1139 | Elf_Internal_Sym *isym; |
1140 | Elf_Internal_Sym *isymend; | |
1141 | Elf_Internal_Sym *isymbuf = NULL; | |
1142 | Elf_External_Versym *xver; | |
1143 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1144 | const struct elf_backend_data *ebd; |
dc810e39 | 1145 | bfd_size_type amt; |
252b5132 RH |
1146 | |
1147 | /* Read each raw ELF symbol, converting from external ELF form to | |
1148 | internal ELF form, and then using the information to create a | |
1149 | canonical bfd symbol table entry. | |
1150 | ||
1151 | Note that we allocate the initial bfd canonical symbol buffer | |
1152 | based on a one-to-one mapping of the ELF symbols to canonical | |
1153 | symbols. We actually use all the ELF symbols, so there will be no | |
1154 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1155 | build the caller's pointer vector. */ |
252b5132 RH |
1156 | |
1157 | if (! dynamic) | |
1158 | { | |
1159 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1160 | verhdr = NULL; | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1165 | if (elf_dynversym (abfd) == 0) | |
1166 | verhdr = NULL; | |
1167 | else | |
1168 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1169 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1170 | && elf_tdata (abfd)->verdef == NULL) | |
1171 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1172 | && elf_tdata (abfd)->verref == NULL)) | |
1173 | { | |
fc0e6df6 | 1174 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1175 | return -1; |
1176 | } | |
1177 | } | |
1178 | ||
6cdc0ccc | 1179 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1180 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1181 | if (symcount == 0) |
1182 | sym = symbase = NULL; | |
1183 | else | |
1184 | { | |
6cdc0ccc AM |
1185 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1186 | NULL, NULL, NULL); | |
1187 | if (isymbuf == NULL) | |
1188 | return -1; | |
252b5132 | 1189 | |
dc810e39 AM |
1190 | amt = symcount; |
1191 | amt *= sizeof (elf_symbol_type); | |
268b6b39 | 1192 | symbase = bfd_zalloc (abfd, amt); |
252b5132 | 1193 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1194 | goto error_return; |
252b5132 RH |
1195 | |
1196 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1197 | if (verhdr != NULL |
1198 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1199 | { | |
1200 | (*_bfd_error_handler) | |
1201 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1202 | abfd->filename, | |
1203 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1204 | symcount); | |
1205 | ||
1206 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1207 | since that is more helpful than just quitting. */ |
252b5132 RH |
1208 | verhdr = NULL; |
1209 | } | |
1210 | ||
1211 | if (verhdr != NULL) | |
1212 | { | |
1213 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1214 | goto error_return; | |
1215 | ||
268b6b39 | 1216 | xverbuf = bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1217 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1218 | goto error_return; |
1219 | ||
268b6b39 | 1220 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1221 | goto error_return; |
1222 | } | |
1223 | ||
1224 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1225 | xver = xverbuf; |
1226 | if (xver != NULL) | |
1227 | ++xver; | |
1228 | isymend = isymbuf + symcount; | |
1229 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1230 | { |
6cdc0ccc | 1231 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1232 | sym->symbol.the_bfd = abfd; |
1233 | ||
26c61ae5 | 1234 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
252b5132 | 1235 | |
6cdc0ccc | 1236 | sym->symbol.value = isym->st_value; |
252b5132 | 1237 | |
6cdc0ccc | 1238 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1239 | { |
1240 | sym->symbol.section = bfd_und_section_ptr; | |
1241 | } | |
6cdc0ccc | 1242 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1243 | { |
1244 | sym->symbol.section = bfd_abs_section_ptr; | |
1245 | } | |
6cdc0ccc | 1246 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1247 | { |
1248 | sym->symbol.section = bfd_com_section_ptr; | |
1249 | /* Elf puts the alignment into the `value' field, and | |
1250 | the size into the `size' field. BFD wants to see the | |
1251 | size in the value field, and doesn't care (at the | |
1252 | moment) about the alignment. */ | |
6cdc0ccc | 1253 | sym->symbol.value = isym->st_size; |
252b5132 | 1254 | } |
252b5132 | 1255 | else |
cb33740c AM |
1256 | { |
1257 | sym->symbol.section | |
1258 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1259 | if (sym->symbol.section == NULL) | |
1260 | { | |
1261 | /* This symbol is in a section for which we did not | |
1262 | create a BFD section. Just use bfd_abs_section, | |
1263 | although it is wrong. FIXME. */ | |
1264 | sym->symbol.section = bfd_abs_section_ptr; | |
1265 | } | |
1266 | } | |
252b5132 | 1267 | |
1049f94e | 1268 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1269 | already section relative. */ |
252b5132 RH |
1270 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1271 | sym->symbol.value -= sym->symbol.section->vma; | |
1272 | ||
6cdc0ccc | 1273 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1274 | { |
1275 | case STB_LOCAL: | |
1276 | sym->symbol.flags |= BSF_LOCAL; | |
1277 | break; | |
1278 | case STB_GLOBAL: | |
6cdc0ccc | 1279 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1280 | sym->symbol.flags |= BSF_GLOBAL; |
1281 | break; | |
1282 | case STB_WEAK: | |
1283 | sym->symbol.flags |= BSF_WEAK; | |
1284 | break; | |
1285 | } | |
1286 | ||
6cdc0ccc | 1287 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1288 | { |
1289 | case STT_SECTION: | |
1290 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1291 | break; | |
1292 | case STT_FILE: | |
1293 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1294 | break; | |
1295 | case STT_FUNC: | |
1296 | sym->symbol.flags |= BSF_FUNCTION; | |
1297 | break; | |
504b7d20 NC |
1298 | case STT_COMMON: |
1299 | /* FIXME: Do we have to put the size field into the value field | |
1300 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
1301 | /* Fall through. */ | |
252b5132 RH |
1302 | case STT_OBJECT: |
1303 | sym->symbol.flags |= BSF_OBJECT; | |
1304 | break; | |
0be9069d L |
1305 | case STT_TLS: |
1306 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1307 | break; | |
d9352518 DB |
1308 | case STT_RELC: |
1309 | sym->symbol.flags |= BSF_RELC; | |
1310 | break; | |
1311 | case STT_SRELC: | |
1312 | sym->symbol.flags |= BSF_SRELC; | |
1313 | break; | |
252b5132 RH |
1314 | } |
1315 | ||
1316 | if (dynamic) | |
1317 | sym->symbol.flags |= BSF_DYNAMIC; | |
1318 | ||
6cdc0ccc | 1319 | if (xver != NULL) |
252b5132 RH |
1320 | { |
1321 | Elf_Internal_Versym iversym; | |
1322 | ||
6cdc0ccc | 1323 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1324 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1325 | xver++; |
252b5132 RH |
1326 | } |
1327 | ||
1328 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1329 | if (ebd->elf_backend_symbol_processing) |
1330 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1331 | } |
1332 | } | |
1333 | ||
1334 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1335 | if (ebd->elf_backend_symbol_table_processing) |
1336 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1337 | |
1338 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1339 | ||
1340 | symcount = sym - symbase; | |
1341 | ||
1342 | /* Fill in the user's symbol pointer vector if needed. */ | |
1343 | if (symptrs) | |
1344 | { | |
1345 | long l = symcount; | |
1346 | ||
1347 | sym = symbase; | |
1348 | while (l-- > 0) | |
1349 | { | |
1350 | *symptrs++ = &sym->symbol; | |
1351 | sym++; | |
1352 | } | |
1353 | *symptrs = 0; /* Final null pointer */ | |
1354 | } | |
1355 | ||
6cdc0ccc AM |
1356 | if (xverbuf != NULL) |
1357 | free (xverbuf); | |
1358 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1359 | free (isymbuf); | |
252b5132 | 1360 | return symcount; |
9ad5cbcf | 1361 | |
252b5132 | 1362 | error_return: |
6cdc0ccc AM |
1363 | if (xverbuf != NULL) |
1364 | free (xverbuf); | |
1365 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1366 | free (isymbuf); | |
252b5132 RH |
1367 | return -1; |
1368 | } | |
1369 | ||
5c799c07 | 1370 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1371 | them. */ |
252b5132 | 1372 | |
b34976b6 | 1373 | static bfd_boolean |
268b6b39 AM |
1374 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1375 | asection *asect, | |
1376 | Elf_Internal_Shdr *rel_hdr, | |
1377 | bfd_size_type reloc_count, | |
1378 | arelent *relents, | |
1379 | asymbol **symbols, | |
1380 | bfd_boolean dynamic) | |
252b5132 | 1381 | { |
9c5bfbb7 | 1382 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1383 | void *allocated = NULL; |
252b5132 | 1384 | bfd_byte *native_relocs; |
252b5132 RH |
1385 | arelent *relent; |
1386 | unsigned int i; | |
1387 | int entsize; | |
5ad8645c | 1388 | unsigned int symcount; |
252b5132 | 1389 | |
268b6b39 | 1390 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1391 | if (allocated == NULL) |
1392 | goto error_return; | |
1393 | ||
1394 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1395 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1396 | != rel_hdr->sh_size)) |
1397 | goto error_return; | |
1398 | ||
268b6b39 | 1399 | native_relocs = allocated; |
252b5132 | 1400 | |
252b5132 RH |
1401 | entsize = rel_hdr->sh_entsize; |
1402 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1403 | || entsize == sizeof (Elf_External_Rela)); | |
1404 | ||
5ad8645c AM |
1405 | if (dynamic) |
1406 | symcount = bfd_get_dynamic_symcount (abfd); | |
1407 | else | |
1408 | symcount = bfd_get_symcount (abfd); | |
1409 | ||
252b5132 RH |
1410 | for (i = 0, relent = relents; |
1411 | i < reloc_count; | |
1412 | i++, relent++, native_relocs += entsize) | |
1413 | { | |
1414 | Elf_Internal_Rela rela; | |
252b5132 RH |
1415 | |
1416 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1417 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1418 | else |
947216bf | 1419 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1420 | |
1421 | /* The address of an ELF reloc is section relative for an object | |
1422 | file, and absolute for an executable file or shared library. | |
1423 | The address of a normal BFD reloc is always section relative, | |
1424 | and the address of a dynamic reloc is absolute.. */ | |
1425 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1426 | relent->address = rela.r_offset; | |
1427 | else | |
1428 | relent->address = rela.r_offset - asect->vma; | |
1429 | ||
1430 | if (ELF_R_SYM (rela.r_info) == 0) | |
1431 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1432 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1433 | { |
1434 | (*_bfd_error_handler) | |
1435 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1436 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1437 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1438 | } | |
252b5132 RH |
1439 | else |
1440 | { | |
b48c61bc | 1441 | asymbol **ps; |
28c9d252 | 1442 | |
252b5132 | 1443 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1444 | |
f9cfae62 | 1445 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1446 | } |
1447 | ||
1448 | relent->addend = rela.r_addend; | |
1449 | ||
90fff0d4 DJ |
1450 | if ((entsize == sizeof (Elf_External_Rela) |
1451 | && ebd->elf_info_to_howto != NULL) | |
1452 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1453 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1454 | else | |
947216bf | 1455 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1456 | } |
1457 | ||
252b5132 RH |
1458 | if (allocated != NULL) |
1459 | free (allocated); | |
1460 | ||
b34976b6 | 1461 | return TRUE; |
252b5132 RH |
1462 | |
1463 | error_return: | |
1464 | if (allocated != NULL) | |
1465 | free (allocated); | |
b34976b6 | 1466 | return FALSE; |
252b5132 RH |
1467 | } |
1468 | ||
42fdc509 MM |
1469 | /* Read in and swap the external relocs. */ |
1470 | ||
b34976b6 | 1471 | bfd_boolean |
268b6b39 AM |
1472 | elf_slurp_reloc_table (bfd *abfd, |
1473 | asection *asect, | |
1474 | asymbol **symbols, | |
1475 | bfd_boolean dynamic) | |
42fdc509 MM |
1476 | { |
1477 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1478 | Elf_Internal_Shdr *rel_hdr; | |
1479 | Elf_Internal_Shdr *rel_hdr2; | |
1480 | bfd_size_type reloc_count; | |
1481 | bfd_size_type reloc_count2; | |
1482 | arelent *relents; | |
dc810e39 | 1483 | bfd_size_type amt; |
42fdc509 MM |
1484 | |
1485 | if (asect->relocation != NULL) | |
b34976b6 | 1486 | return TRUE; |
42fdc509 MM |
1487 | |
1488 | if (! dynamic) | |
1489 | { | |
1490 | if ((asect->flags & SEC_RELOC) == 0 | |
1491 | || asect->reloc_count == 0) | |
b34976b6 | 1492 | return TRUE; |
42fdc509 MM |
1493 | |
1494 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1495 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1496 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1497 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1498 | |
1499 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1500 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1501 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1502 | ||
1503 | } | |
1504 | else | |
1505 | { | |
57e21bef MM |
1506 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1507 | case because relocations against this section may use the | |
1508 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1509 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1510 | if (asect->size == 0) |
b34976b6 | 1511 | return TRUE; |
42fdc509 MM |
1512 | |
1513 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1514 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1515 | rel_hdr2 = NULL; |
57e21bef | 1516 | reloc_count2 = 0; |
42fdc509 MM |
1517 | } |
1518 | ||
dc810e39 | 1519 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
268b6b39 | 1520 | relents = bfd_alloc (abfd, amt); |
42fdc509 | 1521 | if (relents == NULL) |
b34976b6 | 1522 | return FALSE; |
42fdc509 MM |
1523 | |
1524 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1525 | rel_hdr, reloc_count, | |
1526 | relents, | |
1527 | symbols, dynamic)) | |
b34976b6 | 1528 | return FALSE; |
60bcf0fa NC |
1529 | |
1530 | if (rel_hdr2 | |
42fdc509 MM |
1531 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1532 | rel_hdr2, reloc_count2, | |
1533 | relents + reloc_count, | |
1534 | symbols, dynamic)) | |
b34976b6 | 1535 | return FALSE; |
42fdc509 | 1536 | |
42fdc509 | 1537 | asect->relocation = relents; |
b34976b6 | 1538 | return TRUE; |
42fdc509 MM |
1539 | } |
1540 | ||
e460dd0d | 1541 | #if DEBUG & 2 |
252b5132 | 1542 | static void |
268b6b39 | 1543 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1544 | { |
1545 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1546 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1547 | (long) hdr); | |
1548 | fprintf (stderr, | |
1549 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1550 | (long) hdr->sh_name, | |
1551 | (long) hdr->sh_type, | |
1552 | (long) hdr->sh_flags); | |
1553 | fprintf (stderr, | |
1554 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1555 | (long) hdr->sh_addr, | |
1556 | (long) hdr->sh_offset, | |
1557 | (long) hdr->sh_size); | |
1558 | fprintf (stderr, | |
1559 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1560 | (long) hdr->sh_link, | |
1561 | (long) hdr->sh_info, | |
1562 | (long) hdr->sh_addralign); | |
1563 | fprintf (stderr, "sh_entsize = %ld\n", | |
1564 | (long) hdr->sh_entsize); | |
1565 | fflush (stderr); | |
1566 | } | |
e460dd0d | 1567 | #endif |
252b5132 | 1568 | |
e460dd0d | 1569 | #if DEBUG & 1 |
252b5132 | 1570 | static void |
268b6b39 | 1571 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1572 | { |
1573 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1574 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1575 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1576 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1577 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1578 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1579 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1580 | } | |
252b5132 RH |
1581 | #endif |
1582 | \f | |
8d6337fe RM |
1583 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1584 | reconstruct an ELF file by reading the segments out of remote memory | |
1585 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1586 | points to. If not null, *LOADBASEP is filled in with the difference | |
1587 | between the VMAs from which the segments were read, and the VMAs the | |
1588 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1589 | ||
1590 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1591 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1592 | should return zero on success or an `errno' code on failure. TEMPL must | |
1593 | be a BFD for a target with the word size and byte order found in the | |
1594 | remote memory. */ | |
1595 | ||
1596 | bfd * | |
268b6b39 AM |
1597 | NAME(_bfd_elf,bfd_from_remote_memory) |
1598 | (bfd *templ, | |
1599 | bfd_vma ehdr_vma, | |
1600 | bfd_vma *loadbasep, | |
f075ee0c | 1601 | int (*target_read_memory) (bfd_vma, bfd_byte *, int)) |
8d6337fe RM |
1602 | { |
1603 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1604 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1605 | Elf_External_Phdr *x_phdrs; | |
1606 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1607 | bfd *nbfd; | |
1608 | struct bfd_in_memory *bim; | |
1609 | int contents_size; | |
f075ee0c | 1610 | bfd_byte *contents; |
8d6337fe RM |
1611 | int err; |
1612 | unsigned int i; | |
1613 | bfd_vma loadbase; | |
3fec76aa | 1614 | bfd_boolean loadbase_set; |
8d6337fe RM |
1615 | |
1616 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1617 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1618 | if (err) |
1619 | { | |
1620 | bfd_set_error (bfd_error_system_call); | |
1621 | errno = err; | |
1622 | return NULL; | |
1623 | } | |
1624 | ||
1625 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1626 | make use of. The magic number must match, the address size ('class') | |
1627 | and byte-swapping must match our XVEC entry. */ | |
1628 | ||
1629 | if (! elf_file_p (&x_ehdr) | |
1630 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1631 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1632 | { | |
1633 | bfd_set_error (bfd_error_wrong_format); | |
1634 | return NULL; | |
1635 | } | |
1636 | ||
1637 | /* Check that file's byte order matches xvec's */ | |
1638 | switch (x_ehdr.e_ident[EI_DATA]) | |
1639 | { | |
1640 | case ELFDATA2MSB: /* Big-endian */ | |
1641 | if (! bfd_header_big_endian (templ)) | |
1642 | { | |
1643 | bfd_set_error (bfd_error_wrong_format); | |
1644 | return NULL; | |
1645 | } | |
1646 | break; | |
1647 | case ELFDATA2LSB: /* Little-endian */ | |
1648 | if (! bfd_header_little_endian (templ)) | |
1649 | { | |
1650 | bfd_set_error (bfd_error_wrong_format); | |
1651 | return NULL; | |
1652 | } | |
1653 | break; | |
1654 | case ELFDATANONE: /* No data encoding specified */ | |
1655 | default: /* Unknown data encoding specified */ | |
1656 | bfd_set_error (bfd_error_wrong_format); | |
1657 | return NULL; | |
1658 | } | |
1659 | ||
1660 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1661 | ||
1662 | /* The file header tells where to find the program headers. | |
1663 | These are what we use to actually choose what to read. */ | |
1664 | ||
1665 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1666 | { | |
1667 | bfd_set_error (bfd_error_wrong_format); | |
1668 | return NULL; | |
1669 | } | |
1670 | ||
268b6b39 | 1671 | x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); |
8d6337fe RM |
1672 | if (x_phdrs == NULL) |
1673 | { | |
1674 | bfd_set_error (bfd_error_no_memory); | |
1675 | return NULL; | |
1676 | } | |
f075ee0c | 1677 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1678 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1679 | if (err) | |
1680 | { | |
1681 | free (x_phdrs); | |
1682 | bfd_set_error (bfd_error_system_call); | |
1683 | errno = err; | |
1684 | return NULL; | |
1685 | } | |
1686 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1687 | ||
1688 | contents_size = 0; | |
1689 | last_phdr = NULL; | |
1690 | loadbase = ehdr_vma; | |
3fec76aa | 1691 | loadbase_set = FALSE; |
8d6337fe RM |
1692 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1693 | { | |
1694 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1695 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1696 | { |
1697 | bfd_vma segment_end; | |
1698 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1699 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1700 | if (segment_end > (bfd_vma) contents_size) | |
1701 | contents_size = segment_end; | |
1702 | ||
3fec76aa JK |
1703 | /* LOADADDR is the `Base address' from the gELF specification: |
1704 | `lowest p_vaddr value for a PT_LOAD segment' is P_VADDR from the | |
1705 | first PT_LOAD as PT_LOADs are ordered by P_VADDR. */ | |
1706 | if (!loadbase_set && (i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1707 | { | |
1708 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1709 | loadbase_set = TRUE; | |
1710 | } | |
8d6337fe RM |
1711 | |
1712 | last_phdr = &i_phdrs[i]; | |
1713 | } | |
1714 | } | |
1715 | if (last_phdr == NULL) | |
1716 | { | |
1717 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1718 | free (x_phdrs); | |
1719 | bfd_set_error (bfd_error_wrong_format); | |
1720 | return NULL; | |
1721 | } | |
1722 | ||
1723 | /* Trim the last segment so we don't bother with zeros in the last page | |
1724 | that are off the end of the file. However, if the extra bit in that | |
1725 | page includes the section headers, keep them. */ | |
1726 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1727 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1728 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1729 | { | |
1730 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1731 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1732 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1733 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1734 | } | |
1735 | else | |
1736 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1737 | ||
1738 | /* Now we know the size of the whole image we want read in. */ | |
268b6b39 | 1739 | contents = bfd_zmalloc (contents_size); |
8d6337fe RM |
1740 | if (contents == NULL) |
1741 | { | |
1742 | free (x_phdrs); | |
1743 | bfd_set_error (bfd_error_no_memory); | |
1744 | return NULL; | |
1745 | } | |
1746 | ||
1747 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1748 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1749 | { |
1750 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1751 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1752 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1753 | if (end > (bfd_vma) contents_size) | |
1754 | end = contents_size; | |
1755 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1756 | & -i_phdrs[i].p_align, | |
1757 | contents + start, end - start); | |
1758 | if (err) | |
1759 | { | |
1760 | free (x_phdrs); | |
1761 | free (contents); | |
1762 | bfd_set_error (bfd_error_system_call); | |
1763 | errno = err; | |
1764 | return NULL; | |
1765 | } | |
1766 | } | |
1767 | free (x_phdrs); | |
1768 | ||
1769 | /* If the segments visible in memory didn't include the section headers, | |
1770 | then clear them from the file header. */ | |
1771 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1772 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1773 | { | |
1774 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1775 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1776 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1777 | } | |
1778 | ||
1779 | /* This will normally have been in the first PT_LOAD segment. But it | |
1780 | conceivably could be missing, and we might have just changed it. */ | |
1781 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1782 | ||
1783 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
268b6b39 | 1784 | bim = bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1785 | if (bim == NULL) |
1786 | { | |
1787 | free (contents); | |
1788 | bfd_set_error (bfd_error_no_memory); | |
1789 | return NULL; | |
1790 | } | |
1791 | nbfd = _bfd_new_bfd (); | |
1792 | if (nbfd == NULL) | |
1793 | { | |
1794 | free (bim); | |
1795 | free (contents); | |
1796 | bfd_set_error (bfd_error_no_memory); | |
1797 | return NULL; | |
1798 | } | |
1799 | nbfd->filename = "<in-memory>"; | |
1800 | nbfd->xvec = templ->xvec; | |
1801 | bim->size = contents_size; | |
1802 | bim->buffer = contents; | |
268b6b39 | 1803 | nbfd->iostream = bim; |
8d6337fe RM |
1804 | nbfd->flags = BFD_IN_MEMORY; |
1805 | nbfd->direction = read_direction; | |
1806 | nbfd->mtime = time (NULL); | |
1807 | nbfd->mtime_set = TRUE; | |
1808 | ||
1809 | if (loadbasep) | |
1810 | *loadbasep = loadbase; | |
1811 | return nbfd; | |
1812 | } | |
1813 | \f | |
252b5132 | 1814 | #include "elfcore.h" |
252b5132 RH |
1815 | \f |
1816 | /* Size-dependent data and functions. */ | |
1817 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1818 | sizeof (Elf_External_Ehdr), | |
1819 | sizeof (Elf_External_Phdr), | |
1820 | sizeof (Elf_External_Shdr), | |
1821 | sizeof (Elf_External_Rel), | |
1822 | sizeof (Elf_External_Rela), | |
1823 | sizeof (Elf_External_Sym), | |
1824 | sizeof (Elf_External_Dyn), | |
1825 | sizeof (Elf_External_Note), | |
70bcb145 | 1826 | 4, |
c7ac6ff8 | 1827 | 1, |
45d6a902 | 1828 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1829 | ELFCLASS, EV_CURRENT, |
1830 | elf_write_out_phdrs, | |
1831 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1832 | elf_checksum_contents, |
b9f66672 | 1833 | elf_write_relocs, |
73ff0d56 | 1834 | elf_swap_symbol_in, |
252b5132 RH |
1835 | elf_swap_symbol_out, |
1836 | elf_slurp_reloc_table, | |
1837 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1838 | elf_swap_dyn_in, |
1839 | elf_swap_dyn_out, | |
947216bf AM |
1840 | elf_swap_reloc_in, |
1841 | elf_swap_reloc_out, | |
1842 | elf_swap_reloca_in, | |
1843 | elf_swap_reloca_out | |
252b5132 | 1844 | }; |