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, |
ecd12bc1 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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) | |
261b8d08 | 90 | #define elf_core_file_pid NAME(bfd_elf,core_file_pid) |
252b5132 RH |
91 | #define elf_object_p NAME(bfd_elf,object_p) |
92 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
93 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) | |
94 | #define elf_get_dynamic_symtab_upper_bound \ | |
95 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
96 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) | |
97 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
98 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
99 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
100 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) | |
101 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
102 | #define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in) | |
103 | #define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out) | |
104 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
105 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
106 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
107 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
108 | #define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table) | |
6cee3f79 | 109 | #define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab) |
252b5132 RH |
110 | #define elf_canonicalize_dynamic_symtab \ |
111 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
4c45e5c9 JJ |
112 | #define elf_get_synthetic_symtab \ |
113 | NAME(bfd_elf,get_synthetic_symtab) | |
252b5132 RH |
114 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
115 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
116 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
117 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
118 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
119 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
120 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
121 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
122 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
123 | #define elf_find_section NAME(bfd_elf,find_section) | |
252b5132 RH |
124 | #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr) |
125 | #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs) | |
d94838b1 | 126 | #define elf_checksum_contents NAME(bfd_elf,checksum_contents) |
b9f66672 JL |
127 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
128 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
129 | |
130 | #if ARCH_SIZE == 64 | |
131 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
132 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
133 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
134 | #define ELFCLASS ELFCLASS64 | |
135 | #define FILE_ALIGN 8 | |
136 | #define LOG_FILE_ALIGN 3 | |
137 | #endif | |
138 | #if ARCH_SIZE == 32 | |
139 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
140 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
141 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
142 | #define ELFCLASS ELFCLASS32 | |
143 | #define FILE_ALIGN 4 | |
144 | #define LOG_FILE_ALIGN 2 | |
145 | #endif | |
146 | ||
e460dd0d | 147 | #if DEBUG & 2 |
268b6b39 | 148 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
e460dd0d AM |
149 | #endif |
150 | #if DEBUG & 1 | |
268b6b39 | 151 | static void elf_debug_file (Elf_Internal_Ehdr *); |
252b5132 RH |
152 | #endif |
153 | \f | |
154 | /* Structure swapping routines */ | |
155 | ||
156 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
157 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
158 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
159 | #define H_PUT_WORD H_PUT_64 |
160 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
161 | #define H_GET_WORD H_GET_64 | |
162 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
163 | #endif |
164 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
165 | #define H_PUT_WORD H_PUT_32 |
166 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
167 | #define H_GET_WORD H_GET_32 | |
168 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
169 | #endif |
170 | ||
171 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 172 | format. */ |
252b5132 | 173 | |
8384fb8f | 174 | bfd_boolean |
268b6b39 AM |
175 | elf_swap_symbol_in (bfd *abfd, |
176 | const void *psrc, | |
177 | const void *pshn, | |
178 | Elf_Internal_Sym *dst) | |
252b5132 | 179 | { |
a50b1753 NC |
180 | const Elf_External_Sym *src = (const Elf_External_Sym *) psrc; |
181 | const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn; | |
86dc0f79 RH |
182 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
183 | ||
dc810e39 | 184 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 185 | if (signed_vma) |
dc810e39 | 186 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 187 | else |
dc810e39 AM |
188 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
189 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
190 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
191 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
192 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
4fbb74a6 | 193 | if (dst->st_shndx == (SHN_XINDEX & 0xffff)) |
9ad5cbcf AM |
194 | { |
195 | if (shndx == NULL) | |
8384fb8f | 196 | return FALSE; |
9ad5cbcf AM |
197 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); |
198 | } | |
4fbb74a6 AM |
199 | else if (dst->st_shndx >= (SHN_LORESERVE & 0xffff)) |
200 | dst->st_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff); | |
8384fb8f | 201 | return TRUE; |
252b5132 RH |
202 | } |
203 | ||
204 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 205 | format. */ |
252b5132 RH |
206 | |
207 | void | |
268b6b39 AM |
208 | elf_swap_symbol_out (bfd *abfd, |
209 | const Elf_Internal_Sym *src, | |
210 | void *cdst, | |
211 | void *shndx) | |
252b5132 | 212 | { |
9ad5cbcf | 213 | unsigned int tmp; |
a50b1753 | 214 | Elf_External_Sym *dst = (Elf_External_Sym *) cdst; |
dc810e39 AM |
215 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
216 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
217 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
218 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
219 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf | 220 | tmp = src->st_shndx; |
4fbb74a6 | 221 | if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE) |
9ad5cbcf AM |
222 | { |
223 | if (shndx == NULL) | |
224 | abort (); | |
225 | H_PUT_32 (abfd, tmp, shndx); | |
4fbb74a6 | 226 | tmp = SHN_XINDEX & 0xffff; |
9ad5cbcf AM |
227 | } |
228 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
229 | } |
230 | ||
252b5132 | 231 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 232 | internal format. */ |
252b5132 RH |
233 | |
234 | static void | |
268b6b39 AM |
235 | elf_swap_ehdr_in (bfd *abfd, |
236 | const Elf_External_Ehdr *src, | |
237 | Elf_Internal_Ehdr *dst) | |
252b5132 | 238 | { |
448cafa4 | 239 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 240 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
241 | dst->e_type = H_GET_16 (abfd, src->e_type); |
242 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
243 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 244 | if (signed_vma) |
dc810e39 | 245 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 246 | else |
dc810e39 AM |
247 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
248 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
249 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
250 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
251 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
252 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
253 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
254 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
255 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
256 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
257 | } |
258 | ||
259 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 260 | external format. */ |
252b5132 RH |
261 | |
262 | static void | |
268b6b39 AM |
263 | elf_swap_ehdr_out (bfd *abfd, |
264 | const Elf_Internal_Ehdr *src, | |
265 | Elf_External_Ehdr *dst) | |
252b5132 | 266 | { |
5732c114 | 267 | unsigned int tmp; |
448cafa4 | 268 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 269 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 270 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
271 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
272 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
273 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 274 | if (signed_vma) |
dc810e39 | 275 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 276 | else |
dc810e39 AM |
277 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
278 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
279 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
280 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
281 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
282 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
ecd12bc1 AM |
283 | tmp = src->e_phnum; |
284 | if (tmp > PN_XNUM) | |
285 | tmp = PN_XNUM; | |
286 | H_PUT_16 (abfd, tmp, dst->e_phnum); | |
dc810e39 | 287 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); |
5732c114 | 288 | tmp = src->e_shnum; |
4fbb74a6 | 289 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
290 | tmp = SHN_UNDEF; |
291 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
292 | tmp = src->e_shstrndx; | |
4fbb74a6 AM |
293 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
294 | tmp = SHN_XINDEX & 0xffff; | |
5732c114 | 295 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); |
252b5132 RH |
296 | } |
297 | ||
252b5132 | 298 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 299 | ELF section header table entry in internal format. */ |
252b5132 RH |
300 | |
301 | static void | |
268b6b39 AM |
302 | elf_swap_shdr_in (bfd *abfd, |
303 | const Elf_External_Shdr *src, | |
304 | Elf_Internal_Shdr *dst) | |
252b5132 | 305 | { |
86dc0f79 RH |
306 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
307 | ||
dc810e39 AM |
308 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
309 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
310 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 311 | if (signed_vma) |
dc810e39 | 312 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 313 | else |
dc810e39 AM |
314 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
315 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
316 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
317 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
318 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
319 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
320 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
321 | dst->bfd_section = NULL; |
322 | dst->contents = NULL; | |
323 | } | |
324 | ||
325 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 326 | ELF section header table entry in external format. */ |
252b5132 RH |
327 | |
328 | static void | |
268b6b39 AM |
329 | elf_swap_shdr_out (bfd *abfd, |
330 | const Elf_Internal_Shdr *src, | |
331 | Elf_External_Shdr *dst) | |
252b5132 | 332 | { |
3e932841 | 333 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
334 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
335 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
336 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
337 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
338 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
339 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
340 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
341 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
342 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
343 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
344 | } |
345 | ||
252b5132 | 346 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 347 | ELF program header table entry in internal format. */ |
252b5132 RH |
348 | |
349 | void | |
268b6b39 AM |
350 | elf_swap_phdr_in (bfd *abfd, |
351 | const Elf_External_Phdr *src, | |
352 | Elf_Internal_Phdr *dst) | |
252b5132 | 353 | { |
86dc0f79 RH |
354 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
355 | ||
dc810e39 AM |
356 | dst->p_type = H_GET_32 (abfd, src->p_type); |
357 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
358 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
359 | if (signed_vma) |
360 | { | |
dc810e39 AM |
361 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
362 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
363 | } |
364 | else | |
365 | { | |
dc810e39 AM |
366 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
367 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 368 | } |
dc810e39 AM |
369 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
370 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
371 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
372 | } |
373 | ||
374 | void | |
268b6b39 AM |
375 | elf_swap_phdr_out (bfd *abfd, |
376 | const Elf_Internal_Phdr *src, | |
377 | Elf_External_Phdr *dst) | |
252b5132 | 378 | { |
147d51c2 L |
379 | const struct elf_backend_data *bed; |
380 | bfd_vma p_paddr; | |
381 | ||
382 | bed = get_elf_backend_data (abfd); | |
383 | p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr; | |
384 | ||
3e932841 | 385 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
386 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
387 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
388 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
147d51c2 | 389 | H_PUT_WORD (abfd, p_paddr, dst->p_paddr); |
dc810e39 AM |
390 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); |
391 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
392 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
393 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
394 | } |
395 | ||
3e932841 | 396 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 397 | void |
268b6b39 AM |
398 | elf_swap_reloc_in (bfd *abfd, |
399 | const bfd_byte *s, | |
400 | Elf_Internal_Rela *dst) | |
252b5132 | 401 | { |
947216bf | 402 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
403 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
404 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 405 | dst->r_addend = 0; |
252b5132 RH |
406 | } |
407 | ||
947216bf | 408 | void |
268b6b39 AM |
409 | elf_swap_reloca_in (bfd *abfd, |
410 | const bfd_byte *s, | |
411 | Elf_Internal_Rela *dst) | |
252b5132 | 412 | { |
947216bf | 413 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
414 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
415 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
416 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
417 | } |
418 | ||
3e932841 | 419 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 420 | void |
268b6b39 AM |
421 | elf_swap_reloc_out (bfd *abfd, |
422 | const Elf_Internal_Rela *src, | |
423 | bfd_byte *d) | |
252b5132 | 424 | { |
947216bf | 425 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
426 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
427 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
428 | } |
429 | ||
947216bf | 430 | void |
268b6b39 AM |
431 | elf_swap_reloca_out (bfd *abfd, |
432 | const Elf_Internal_Rela *src, | |
433 | bfd_byte *d) | |
252b5132 | 434 | { |
947216bf | 435 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
436 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
437 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
438 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
439 | } |
440 | ||
268b6b39 AM |
441 | void |
442 | elf_swap_dyn_in (bfd *abfd, | |
443 | const void *p, | |
444 | Elf_Internal_Dyn *dst) | |
252b5132 | 445 | { |
a50b1753 | 446 | const Elf_External_Dyn *src = (const Elf_External_Dyn *) p; |
252b5132 | 447 | |
dc810e39 AM |
448 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
449 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
450 | } |
451 | ||
268b6b39 AM |
452 | void |
453 | elf_swap_dyn_out (bfd *abfd, | |
454 | const Elf_Internal_Dyn *src, | |
455 | void *p) | |
252b5132 | 456 | { |
a50b1753 | 457 | Elf_External_Dyn *dst = (Elf_External_Dyn *) p; |
c7ac6ff8 | 458 | |
dc810e39 AM |
459 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
460 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
461 | } |
462 | \f | |
463 | /* ELF .o/exec file reading */ | |
464 | ||
252b5132 RH |
465 | /* Begin processing a given object. |
466 | ||
467 | First we validate the file by reading in the ELF header and checking | |
468 | the magic number. */ | |
469 | ||
268b6b39 AM |
470 | static inline bfd_boolean |
471 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
472 | { |
473 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
474 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
475 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
476 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
477 | } | |
478 | ||
479 | /* Check to see if the file associated with ABFD matches the target vector | |
480 | that ABFD points to. | |
481 | ||
482 | Note that we may be called several times with the same ABFD, but different | |
483 | target vectors, most of which will not match. We have to avoid leaving | |
484 | any side effects in ABFD, or any data it points to (like tdata), if the | |
485 | file does not match the target vector. */ | |
486 | ||
487 | const bfd_target * | |
268b6b39 | 488 | elf_object_p (bfd *abfd) |
252b5132 RH |
489 | { |
490 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
491 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
492 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 493 | Elf_Internal_Shdr i_shdr; |
ed591155 | 494 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 495 | unsigned int shindex; |
9c5bfbb7 | 496 | const struct elf_backend_data *ebd; |
ed591155 | 497 | struct bfd_preserve preserve; |
252b5132 | 498 | asection *s; |
dc810e39 | 499 | bfd_size_type amt; |
d1036acb L |
500 | const bfd_target *target; |
501 | const bfd_target * const *target_ptr; | |
252b5132 | 502 | |
e84d6fca | 503 | preserve.marker = NULL; |
a17cc40f | 504 | |
252b5132 RH |
505 | /* Read in the ELF header in external format. */ |
506 | ||
268b6b39 | 507 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
508 | { |
509 | if (bfd_get_error () != bfd_error_system_call) | |
510 | goto got_wrong_format_error; | |
511 | else | |
512 | goto got_no_match; | |
513 | } | |
514 | ||
515 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
516 | make use of. The magic number must match, the address size ('class') | |
517 | and byte-swapping must match our XVEC entry, and it must have a | |
518 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 519 | file). */ |
252b5132 | 520 | |
82e51918 AM |
521 | if (! elf_file_p (&x_ehdr) |
522 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
523 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
524 | goto got_wrong_format_error; |
525 | ||
526 | /* Check that file's byte order matches xvec's */ | |
527 | switch (x_ehdr.e_ident[EI_DATA]) | |
528 | { | |
529 | case ELFDATA2MSB: /* Big-endian */ | |
530 | if (! bfd_header_big_endian (abfd)) | |
531 | goto got_wrong_format_error; | |
532 | break; | |
533 | case ELFDATA2LSB: /* Little-endian */ | |
534 | if (! bfd_header_little_endian (abfd)) | |
535 | goto got_wrong_format_error; | |
536 | break; | |
537 | case ELFDATANONE: /* No data encoding specified */ | |
538 | default: /* Unknown data encoding specified */ | |
539 | goto got_wrong_format_error; | |
540 | } | |
541 | ||
0c83546a AM |
542 | if (!bfd_preserve_save (abfd, &preserve)) |
543 | goto got_no_match; | |
544 | ||
d1036acb L |
545 | target = abfd->xvec; |
546 | ||
252b5132 RH |
547 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
548 | the tdata pointer in the bfd. */ | |
549 | ||
d1036acb | 550 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 551 | goto got_no_match; |
0c83546a | 552 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 553 | |
252b5132 RH |
554 | /* Now that we know the byte order, swap in the rest of the header */ |
555 | i_ehdrp = elf_elfheader (abfd); | |
556 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
557 | #if DEBUG & 1 | |
558 | elf_debug_file (i_ehdrp); | |
559 | #endif | |
560 | ||
561 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
562 | if (i_ehdrp->e_type == ET_CORE) | |
563 | goto got_wrong_format_error; | |
564 | ||
0c35f01a AM |
565 | /* If this is a relocatable file and there is no section header |
566 | table, then we're hosed. */ | |
567 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
568 | goto got_wrong_format_error; |
569 | ||
e460dd0d | 570 | /* As a simple sanity check, verify that what BFD thinks is the |
252b5132 | 571 | size of each section header table entry actually matches the size |
0c35f01a AM |
572 | recorded in the file, but only if there are any sections. */ |
573 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
574 | goto got_wrong_format_error; |
575 | ||
7ece0d85 JJ |
576 | /* Further sanity check. */ |
577 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
578 | goto got_wrong_format_error; | |
579 | ||
252b5132 | 580 | ebd = get_elf_backend_data (abfd); |
11a7ae4f AM |
581 | if (ebd->s->arch_size != ARCH_SIZE) |
582 | goto got_wrong_format_error; | |
252b5132 RH |
583 | |
584 | /* Check that the ELF e_machine field matches what this particular | |
585 | BFD format expects. */ | |
586 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
587 | && (ebd->elf_machine_alt1 == 0 |
588 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
589 | && (ebd->elf_machine_alt2 == 0 | |
590 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 | 591 | { |
252b5132 RH |
592 | if (ebd->elf_machine_code != EM_NONE) |
593 | goto got_wrong_format_error; | |
594 | ||
595 | /* This is the generic ELF target. Let it match any ELF target | |
596 | for which we do not have a specific backend. */ | |
597 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
598 | { | |
9c5bfbb7 | 599 | const struct elf_backend_data *back; |
252b5132 RH |
600 | |
601 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
602 | continue; | |
f7231afc | 603 | back = xvec_get_elf_backend_data (*target_ptr); |
11a7ae4f AM |
604 | if (back->s->arch_size != ARCH_SIZE) |
605 | continue; | |
252b5132 RH |
606 | if (back->elf_machine_code == i_ehdrp->e_machine |
607 | || (back->elf_machine_alt1 != 0 | |
608 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
609 | || (back->elf_machine_alt2 != 0 | |
610 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
611 | { | |
612 | /* target_ptr is an ELF backend which matches this | |
613 | object file, so reject the generic ELF target. */ | |
614 | goto got_wrong_format_error; | |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | if (i_ehdrp->e_type == ET_EXEC) | |
620 | abfd->flags |= EXEC_P; | |
621 | else if (i_ehdrp->e_type == ET_DYN) | |
622 | abfd->flags |= DYNAMIC; | |
623 | ||
624 | if (i_ehdrp->e_phnum > 0) | |
625 | abfd->flags |= D_PAGED; | |
626 | ||
627 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
628 | { | |
629 | /* It's OK if this fails for the generic target. */ | |
630 | if (ebd->elf_machine_code != EM_NONE) | |
631 | goto got_no_match; | |
632 | } | |
633 | ||
d1036acb L |
634 | if (ebd->elf_machine_code != EM_NONE |
635 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi) | |
636 | { | |
637 | if (ebd->elf_osabi != ELFOSABI_NONE) | |
638 | goto got_wrong_format_error; | |
639 | ||
640 | /* This is an ELFOSABI_NONE ELF target. Let it match any ELF | |
641 | target of the compatible machine for which we do not have a | |
642 | backend with matching ELFOSABI. */ | |
643 | for (target_ptr = bfd_target_vector; | |
644 | *target_ptr != NULL; | |
645 | target_ptr++) | |
646 | { | |
647 | const struct elf_backend_data *back; | |
648 | ||
649 | /* Skip this target and targets with incompatible byte | |
650 | order. */ | |
651 | if (*target_ptr == target | |
652 | || (*target_ptr)->flavour != bfd_target_elf_flavour | |
653 | || (*target_ptr)->byteorder != target->byteorder | |
654 | || ((*target_ptr)->header_byteorder | |
655 | != target->header_byteorder)) | |
656 | continue; | |
657 | ||
f7231afc | 658 | back = xvec_get_elf_backend_data (*target_ptr); |
d1036acb L |
659 | if (back->elf_osabi == i_ehdrp->e_ident[EI_OSABI] |
660 | && (back->elf_machine_code == i_ehdrp->e_machine | |
661 | || (back->elf_machine_alt1 != 0 | |
662 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
663 | || (back->elf_machine_alt2 != 0 | |
664 | && back->elf_machine_alt2 == i_ehdrp->e_machine))) | |
665 | { | |
666 | /* target_ptr is an ELF backend which matches this | |
667 | object file, so reject the ELFOSABI_NONE ELF target. */ | |
668 | goto got_wrong_format_error; | |
669 | } | |
670 | } | |
671 | } | |
672 | ||
7ece0d85 JJ |
673 | if (i_ehdrp->e_shoff != 0) |
674 | { | |
0560d0f7 AM |
675 | bfd_signed_vma where = i_ehdrp->e_shoff; |
676 | ||
677 | if (where != (file_ptr) where) | |
678 | goto got_wrong_format_error; | |
679 | ||
7ece0d85 | 680 | /* Seek to the section header table in the file. */ |
0560d0f7 | 681 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) |
7ece0d85 | 682 | goto got_no_match; |
5732c114 | 683 | |
7ece0d85 JJ |
684 | /* Read the first section header at index 0, and convert to internal |
685 | form. */ | |
268b6b39 | 686 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
687 | goto got_no_match; |
688 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 689 | |
7ece0d85 JJ |
690 | /* If the section count is zero, the actual count is in the first |
691 | section header. */ | |
692 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
693 | { |
694 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
24639c7d JJ |
695 | if (i_ehdrp->e_shnum != i_shdr.sh_size |
696 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
697 | goto got_wrong_format_error; |
698 | } | |
5732c114 | 699 | |
7ece0d85 | 700 | /* And similarly for the string table index. */ |
4fbb74a6 | 701 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
702 | { |
703 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
704 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
705 | goto got_wrong_format_error; | |
706 | } | |
707 | ||
ecd12bc1 AM |
708 | /* And program headers. */ |
709 | if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0) | |
710 | { | |
711 | i_ehdrp->e_phnum = i_shdr.sh_info; | |
712 | if (i_ehdrp->e_phnum != i_shdr.sh_info) | |
713 | goto got_wrong_format_error; | |
714 | } | |
715 | ||
0560d0f7 AM |
716 | /* Sanity check that we can read all of the section headers. |
717 | It ought to be good enough to just read the last one. */ | |
718 | if (i_ehdrp->e_shnum != 1) | |
719 | { | |
720 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
721 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
722 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
723 | goto got_wrong_format_error; |
724 | ||
725 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
726 | if (where != (file_ptr) where) | |
727 | goto got_wrong_format_error; | |
728 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) | |
729 | goto got_wrong_format_error; | |
730 | ||
731 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
732 | goto got_no_match; | |
733 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
734 | goto got_no_match; | |
735 | ||
736 | /* Back to where we were. */ | |
737 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
738 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
739 | goto got_no_match; | |
740 | } | |
7ece0d85 | 741 | } |
5732c114 | 742 | |
252b5132 | 743 | /* Allocate space for a copy of the section header table in |
5732c114 | 744 | internal form. */ |
0c35f01a AM |
745 | if (i_ehdrp->e_shnum != 0) |
746 | { | |
5732c114 | 747 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 748 | unsigned int num_sec; |
5732c114 | 749 | |
0c35f01a | 750 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
a50b1753 | 751 | i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt); |
5732c114 AM |
752 | if (!i_shdrp) |
753 | goto got_no_match; | |
9ad5cbcf | 754 | num_sec = i_ehdrp->e_shnum; |
9ad5cbcf AM |
755 | elf_numsections (abfd) = num_sec; |
756 | amt = sizeof (i_shdrp) * num_sec; | |
a50b1753 | 757 | elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt); |
5732c114 | 758 | if (!elf_elfsections (abfd)) |
0c35f01a | 759 | goto got_no_match; |
5732c114 AM |
760 | |
761 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
4fbb74a6 | 762 | for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++) |
5732c114 | 763 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 764 | |
ed591155 AM |
765 | /* Read in the rest of the section header table and convert it |
766 | to internal form. */ | |
767 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
768 | { | |
268b6b39 | 769 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
770 | goto got_no_match; |
771 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
772 | ||
24639c7d | 773 | /* Sanity check sh_link and sh_info. */ |
4fbb74a6 | 774 | if (i_shdrp[shindex].sh_link >= num_sec) |
cfcac11d | 775 | { |
caa83f8b | 776 | /* PR 10478: Accept Solaris binaries with a sh_link |
cfcac11d NC |
777 | field set to SHN_BEFORE or SHN_AFTER. */ |
778 | switch (ebd->elf_machine_code) | |
779 | { | |
caa83f8b NC |
780 | case EM_386: |
781 | case EM_486: | |
782 | case EM_X86_64: | |
cfcac11d NC |
783 | case EM_OLD_SPARCV9: |
784 | case EM_SPARC32PLUS: | |
785 | case EM_SPARCV9: | |
786 | case EM_SPARC: | |
787 | if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */ | |
788 | || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */) | |
789 | break; | |
790 | /* Otherwise fall through. */ | |
791 | default: | |
792 | goto got_wrong_format_error; | |
793 | } | |
794 | } | |
24639c7d JJ |
795 | |
796 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
797 | || i_shdrp[shindex].sh_type == SHT_RELA | |
798 | || i_shdrp[shindex].sh_type == SHT_REL) | |
4fbb74a6 | 799 | && i_shdrp[shindex].sh_info >= num_sec) |
24639c7d JJ |
800 | goto got_wrong_format_error; |
801 | ||
ed591155 AM |
802 | /* If the section is loaded, but not page aligned, clear |
803 | D_PAGED. */ | |
804 | if (i_shdrp[shindex].sh_size != 0 | |
805 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
806 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
807 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 808 | % ebd->minpagesize) |
ed591155 AM |
809 | != 0)) |
810 | abfd->flags &= ~D_PAGED; | |
811 | } | |
252b5132 | 812 | } |
ed591155 | 813 | |
24639c7d JJ |
814 | /* A further sanity check. */ |
815 | if (i_ehdrp->e_shnum != 0) | |
816 | { | |
4fbb74a6 | 817 | if (i_ehdrp->e_shstrndx >= elf_numsections (abfd)) |
0b49d371 NC |
818 | { |
819 | /* PR 2257: | |
820 | We used to just goto got_wrong_format_error here | |
821 | but there are binaries in existance for which this test | |
822 | will prevent the binutils from working with them at all. | |
823 | So we are kind, and reset the string index value to 0 | |
824 | so that at least some processing can be done. */ | |
825 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
826 | _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename); | |
827 | } | |
24639c7d | 828 | } |
0b49d371 | 829 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
830 | goto got_wrong_format_error; |
831 | ||
252b5132 RH |
832 | /* Read in the program headers. */ |
833 | if (i_ehdrp->e_phnum == 0) | |
834 | elf_tdata (abfd)->phdr = NULL; | |
835 | else | |
836 | { | |
837 | Elf_Internal_Phdr *i_phdr; | |
838 | unsigned int i; | |
839 | ||
dc810e39 | 840 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
a50b1753 | 841 | elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt); |
252b5132 RH |
842 | if (elf_tdata (abfd)->phdr == NULL) |
843 | goto got_no_match; | |
dc810e39 | 844 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
845 | goto got_no_match; |
846 | i_phdr = elf_tdata (abfd)->phdr; | |
847 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
848 | { | |
849 | Elf_External_Phdr x_phdr; | |
850 | ||
268b6b39 | 851 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
852 | goto got_no_match; |
853 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
854 | } | |
855 | } | |
856 | ||
1b3a8575 | 857 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 858 | { |
9ad5cbcf AM |
859 | unsigned int num_sec; |
860 | ||
0c35f01a AM |
861 | /* Once all of the section headers have been read and converted, we |
862 | can start processing them. Note that the first section header is | |
863 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
864 | num_sec = elf_numsections (abfd); |
865 | for (shindex = 1; shindex < num_sec; shindex++) | |
4fbb74a6 AM |
866 | if (!bfd_section_from_shdr (abfd, shindex)) |
867 | goto got_no_match; | |
3d7f7666 | 868 | |
dd863624 L |
869 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
870 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 871 | goto got_wrong_format_error; |
252b5132 RH |
872 | } |
873 | ||
874 | /* Let the backend double check the format and override global | |
875 | information. */ | |
876 | if (ebd->elf_backend_object_p) | |
877 | { | |
82e51918 | 878 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
879 | goto got_wrong_format_error; |
880 | } | |
881 | ||
a14199db AM |
882 | /* Remember the entry point specified in the ELF file header. */ |
883 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
884 | ||
252b5132 RH |
885 | /* If we have created any reloc sections that are associated with |
886 | debugging sections, mark the reloc sections as debugging as well. */ | |
887 | for (s = abfd->sections; s != NULL; s = s->next) | |
888 | { | |
889 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
890 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
891 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
892 | { | |
893 | unsigned long targ_index; | |
894 | asection *targ_sec; | |
895 | ||
896 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
897 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
898 | if (targ_sec != NULL | |
899 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
900 | s->flags |= SEC_DEBUGGING; | |
901 | } | |
902 | } | |
903 | ||
e84d6fca | 904 | bfd_preserve_finish (abfd, &preserve); |
d1036acb | 905 | return target; |
252b5132 RH |
906 | |
907 | got_wrong_format_error: | |
a77a9fef HPN |
908 | /* There is way too much undoing of half-known state here. The caller, |
909 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
910 | check match/no-match like it does. We have to rely on that a call to | |
911 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
912 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
913 | For this to work, only elf-data and the mach may be changed by the | |
914 | target-specific elf_backend_object_p function. Note that saving the | |
915 | whole bfd here and restoring it would be even worse; the first thing | |
916 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 917 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 918 | |
252b5132 | 919 | got_no_match: |
e84d6fca AM |
920 | if (preserve.marker != NULL) |
921 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 922 | return NULL; |
252b5132 RH |
923 | } |
924 | \f | |
925 | /* ELF .o/exec file writing */ | |
926 | ||
927 | /* Write out the relocs. */ | |
928 | ||
b9f66672 | 929 | void |
268b6b39 | 930 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 931 | { |
a50b1753 | 932 | bfd_boolean *failedp = (bfd_boolean *) data; |
252b5132 | 933 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 934 | bfd_vma addr_offset; |
c39a58e6 | 935 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
936 | size_t extsize; |
937 | bfd_byte *dst_rela; | |
252b5132 | 938 | unsigned int idx; |
947216bf AM |
939 | asymbol *last_sym; |
940 | int last_sym_idx; | |
252b5132 RH |
941 | |
942 | /* If we have already failed, don't do anything. */ | |
943 | if (*failedp) | |
944 | return; | |
945 | ||
946 | if ((sec->flags & SEC_RELOC) == 0) | |
947 | return; | |
948 | ||
949 | /* The linker backend writes the relocs out itself, and sets the | |
950 | reloc_count field to zero to inhibit writing them here. Also, | |
951 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
952 | relocs. */ | |
953 | if (sec->reloc_count == 0) | |
954 | return; | |
955 | ||
9a44bbd9 DJ |
956 | /* If we have opened an existing file for update, reloc_count may be |
957 | set even though we are not linking. In that case we have nothing | |
958 | to do. */ | |
959 | if (sec->orelocation == NULL) | |
960 | return; | |
961 | ||
d4730f92 BS |
962 | rela_hdr = elf_section_data (sec)->rela.hdr; |
963 | if (rela_hdr == NULL) | |
964 | rela_hdr = elf_section_data (sec)->rel.hdr; | |
252b5132 RH |
965 | |
966 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
a50b1753 | 967 | rela_hdr->contents = (unsigned char *) bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
968 | if (rela_hdr->contents == NULL) |
969 | { | |
b34976b6 | 970 | *failedp = TRUE; |
252b5132 RH |
971 | return; |
972 | } | |
973 | ||
bf572ba0 MM |
974 | /* Figure out whether the relocations are RELA or REL relocations. */ |
975 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
976 | { |
977 | swap_out = elf_swap_reloca_out; | |
978 | extsize = sizeof (Elf_External_Rela); | |
979 | } | |
bf572ba0 | 980 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
981 | { |
982 | swap_out = elf_swap_reloc_out; | |
983 | extsize = sizeof (Elf_External_Rel); | |
984 | } | |
bf572ba0 MM |
985 | else |
986 | /* Every relocation section should be either an SHT_RELA or an | |
987 | SHT_REL section. */ | |
988 | abort (); | |
989 | ||
947216bf AM |
990 | /* The address of an ELF reloc is section relative for an object |
991 | file, and absolute for an executable file or shared library. | |
992 | The address of a BFD reloc is always section relative. */ | |
993 | addr_offset = 0; | |
994 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
995 | addr_offset = sec->vma; | |
996 | ||
3e932841 | 997 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
998 | last_sym = 0; |
999 | last_sym_idx = 0; | |
1000 | dst_rela = rela_hdr->contents; | |
252b5132 | 1001 | |
947216bf AM |
1002 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
1003 | { | |
1004 | Elf_Internal_Rela src_rela; | |
1005 | arelent *ptr; | |
1006 | asymbol *sym; | |
1007 | int n; | |
1008 | ||
1009 | ptr = sec->orelocation[idx]; | |
1010 | sym = *ptr->sym_ptr_ptr; | |
1011 | if (sym == last_sym) | |
1012 | n = last_sym_idx; | |
1013 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
1014 | n = STN_UNDEF; | |
1015 | else | |
252b5132 | 1016 | { |
947216bf AM |
1017 | last_sym = sym; |
1018 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
1019 | if (n < 0) | |
252b5132 | 1020 | { |
b34976b6 | 1021 | *failedp = TRUE; |
252b5132 RH |
1022 | return; |
1023 | } | |
947216bf | 1024 | last_sym_idx = n; |
252b5132 | 1025 | } |
252b5132 | 1026 | |
947216bf AM |
1027 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
1028 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
1029 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 1030 | { |
b34976b6 | 1031 | *failedp = TRUE; |
947216bf | 1032 | return; |
252b5132 | 1033 | } |
947216bf AM |
1034 | |
1035 | src_rela.r_offset = ptr->address + addr_offset; | |
1036 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
1037 | src_rela.r_addend = ptr->addend; | |
1038 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
1039 | } |
1040 | } | |
1041 | ||
1042 | /* Write out the program headers. */ | |
1043 | ||
1044 | int | |
268b6b39 AM |
1045 | elf_write_out_phdrs (bfd *abfd, |
1046 | const Elf_Internal_Phdr *phdr, | |
1047 | unsigned int count) | |
252b5132 RH |
1048 | { |
1049 | while (count--) | |
1050 | { | |
1051 | Elf_External_Phdr extphdr; | |
1052 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
1053 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1054 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1055 | return -1; |
1056 | phdr++; | |
1057 | } | |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | /* Write out the section headers and the ELF file header. */ | |
1062 | ||
b34976b6 | 1063 | bfd_boolean |
268b6b39 | 1064 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1065 | { |
1066 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1067 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1068 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1069 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1070 | unsigned int count; | |
dc810e39 | 1071 | bfd_size_type amt; |
252b5132 RH |
1072 | |
1073 | i_ehdrp = elf_elfheader (abfd); | |
1074 | i_shdrp = elf_elfsections (abfd); | |
1075 | ||
3e932841 | 1076 | /* swap the header before spitting it out... */ |
252b5132 RH |
1077 | |
1078 | #if DEBUG & 1 | |
1079 | elf_debug_file (i_ehdrp); | |
1080 | #endif | |
1081 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1082 | amt = sizeof (x_ehdr); |
252b5132 | 1083 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1084 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1085 | return FALSE; |
252b5132 | 1086 | |
5732c114 AM |
1087 | /* Some fields in the first section header handle overflow of ehdr |
1088 | fields. */ | |
ecd12bc1 AM |
1089 | if (i_ehdrp->e_phnum >= PN_XNUM) |
1090 | i_shdrp[0]->sh_info = i_ehdrp->e_phnum; | |
4fbb74a6 | 1091 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1092 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1093 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1094 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1095 | ||
3e932841 | 1096 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1097 | amt = i_ehdrp->e_shnum; |
1098 | amt *= sizeof (*x_shdrp); | |
a50b1753 | 1099 | x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt); |
252b5132 | 1100 | if (!x_shdrp) |
b34976b6 | 1101 | return FALSE; |
252b5132 | 1102 | |
5732c114 | 1103 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1104 | { |
1105 | #if DEBUG & 2 | |
5732c114 | 1106 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1107 | #endif |
5732c114 | 1108 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
252b5132 RH |
1109 | } |
1110 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 1111 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1112 | return FALSE; |
252b5132 | 1113 | |
3e932841 | 1114 | /* need to dump the string table too... */ |
252b5132 | 1115 | |
b34976b6 | 1116 | return TRUE; |
252b5132 RH |
1117 | } |
1118 | ||
d94838b1 RM |
1119 | bfd_boolean |
1120 | elf_checksum_contents (bfd *abfd, | |
1121 | void (*process) (const void *, size_t, void *), | |
1122 | void *arg) | |
1123 | { | |
1124 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1125 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1126 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1127 | unsigned int count, num; | |
1128 | ||
1129 | { | |
1130 | Elf_External_Ehdr x_ehdr; | |
1131 | Elf_Internal_Ehdr i_ehdr; | |
1132 | ||
1133 | i_ehdr = *i_ehdrp; | |
1134 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1135 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1136 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1137 | } | |
1138 | ||
1139 | num = i_ehdrp->e_phnum; | |
1140 | for (count = 0; count < num; count++) | |
1141 | { | |
1142 | Elf_External_Phdr x_phdr; | |
1143 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1144 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1145 | } | |
1146 | ||
1147 | num = elf_numsections (abfd); | |
1148 | for (count = 0; count < num; count++) | |
1149 | { | |
1150 | Elf_Internal_Shdr i_shdr; | |
1151 | Elf_External_Shdr x_shdr; | |
1152 | ||
1153 | i_shdr = *i_shdrp[count]; | |
1154 | i_shdr.sh_offset = 0; | |
1155 | ||
1156 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1157 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1158 | ||
1159 | if (i_shdr.contents) | |
1160 | (*process) (i_shdr.contents, i_shdr.sh_size, arg); | |
1161 | } | |
1162 | ||
1163 | return TRUE; | |
1164 | } | |
1165 | ||
252b5132 | 1166 | long |
268b6b39 | 1167 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1168 | { |
1169 | Elf_Internal_Shdr *hdr; | |
1170 | Elf_Internal_Shdr *verhdr; | |
1171 | unsigned long symcount; /* Number of external ELF symbols */ | |
1172 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1173 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1174 | Elf_Internal_Sym *isym; |
1175 | Elf_Internal_Sym *isymend; | |
1176 | Elf_Internal_Sym *isymbuf = NULL; | |
1177 | Elf_External_Versym *xver; | |
1178 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1179 | const struct elf_backend_data *ebd; |
dc810e39 | 1180 | bfd_size_type amt; |
252b5132 RH |
1181 | |
1182 | /* Read each raw ELF symbol, converting from external ELF form to | |
1183 | internal ELF form, and then using the information to create a | |
1184 | canonical bfd symbol table entry. | |
1185 | ||
1186 | Note that we allocate the initial bfd canonical symbol buffer | |
1187 | based on a one-to-one mapping of the ELF symbols to canonical | |
1188 | symbols. We actually use all the ELF symbols, so there will be no | |
1189 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1190 | build the caller's pointer vector. */ |
252b5132 RH |
1191 | |
1192 | if (! dynamic) | |
1193 | { | |
1194 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1195 | verhdr = NULL; | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1200 | if (elf_dynversym (abfd) == 0) | |
1201 | verhdr = NULL; | |
1202 | else | |
1203 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1204 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1205 | && elf_tdata (abfd)->verdef == NULL) | |
1206 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1207 | && elf_tdata (abfd)->verref == NULL)) | |
1208 | { | |
fc0e6df6 | 1209 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1210 | return -1; |
1211 | } | |
1212 | } | |
1213 | ||
6cdc0ccc | 1214 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1215 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1216 | if (symcount == 0) |
1217 | sym = symbase = NULL; | |
1218 | else | |
1219 | { | |
6cdc0ccc AM |
1220 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1221 | NULL, NULL, NULL); | |
1222 | if (isymbuf == NULL) | |
1223 | return -1; | |
252b5132 | 1224 | |
dc810e39 AM |
1225 | amt = symcount; |
1226 | amt *= sizeof (elf_symbol_type); | |
a50b1753 | 1227 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt); |
252b5132 | 1228 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1229 | goto error_return; |
252b5132 RH |
1230 | |
1231 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1232 | if (verhdr != NULL |
1233 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1234 | { | |
1235 | (*_bfd_error_handler) | |
1236 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1237 | abfd->filename, | |
1238 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1239 | symcount); | |
1240 | ||
1241 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1242 | since that is more helpful than just quitting. */ |
252b5132 RH |
1243 | verhdr = NULL; |
1244 | } | |
1245 | ||
1246 | if (verhdr != NULL) | |
1247 | { | |
1248 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1249 | goto error_return; | |
1250 | ||
a50b1753 | 1251 | xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1252 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1253 | goto error_return; |
1254 | ||
268b6b39 | 1255 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1256 | goto error_return; |
1257 | } | |
1258 | ||
1259 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1260 | xver = xverbuf; |
1261 | if (xver != NULL) | |
1262 | ++xver; | |
1263 | isymend = isymbuf + symcount; | |
1264 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1265 | { |
6cdc0ccc | 1266 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1267 | sym->symbol.the_bfd = abfd; |
1268 | ||
26c61ae5 | 1269 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
252b5132 | 1270 | |
6cdc0ccc | 1271 | sym->symbol.value = isym->st_value; |
252b5132 | 1272 | |
6cdc0ccc | 1273 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1274 | { |
1275 | sym->symbol.section = bfd_und_section_ptr; | |
1276 | } | |
6cdc0ccc | 1277 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1278 | { |
1279 | sym->symbol.section = bfd_abs_section_ptr; | |
1280 | } | |
6cdc0ccc | 1281 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1282 | { |
1283 | sym->symbol.section = bfd_com_section_ptr; | |
1284 | /* Elf puts the alignment into the `value' field, and | |
1285 | the size into the `size' field. BFD wants to see the | |
1286 | size in the value field, and doesn't care (at the | |
1287 | moment) about the alignment. */ | |
6cdc0ccc | 1288 | sym->symbol.value = isym->st_size; |
252b5132 | 1289 | } |
252b5132 | 1290 | else |
cb33740c AM |
1291 | { |
1292 | sym->symbol.section | |
1293 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1294 | if (sym->symbol.section == NULL) | |
1295 | { | |
1296 | /* This symbol is in a section for which we did not | |
1297 | create a BFD section. Just use bfd_abs_section, | |
1298 | although it is wrong. FIXME. */ | |
1299 | sym->symbol.section = bfd_abs_section_ptr; | |
1300 | } | |
1301 | } | |
252b5132 | 1302 | |
1049f94e | 1303 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1304 | already section relative. */ |
252b5132 RH |
1305 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1306 | sym->symbol.value -= sym->symbol.section->vma; | |
1307 | ||
6cdc0ccc | 1308 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1309 | { |
1310 | case STB_LOCAL: | |
1311 | sym->symbol.flags |= BSF_LOCAL; | |
1312 | break; | |
1313 | case STB_GLOBAL: | |
6cdc0ccc | 1314 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1315 | sym->symbol.flags |= BSF_GLOBAL; |
1316 | break; | |
1317 | case STB_WEAK: | |
1318 | sym->symbol.flags |= BSF_WEAK; | |
1319 | break; | |
3e7a7d11 NC |
1320 | case STB_GNU_UNIQUE: |
1321 | sym->symbol.flags |= BSF_GNU_UNIQUE; | |
1322 | break; | |
252b5132 RH |
1323 | } |
1324 | ||
6cdc0ccc | 1325 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1326 | { |
1327 | case STT_SECTION: | |
1328 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1329 | break; | |
1330 | case STT_FILE: | |
1331 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1332 | break; | |
1333 | case STT_FUNC: | |
1334 | sym->symbol.flags |= BSF_FUNCTION; | |
1335 | break; | |
504b7d20 NC |
1336 | case STT_COMMON: |
1337 | /* FIXME: Do we have to put the size field into the value field | |
1338 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
1339 | /* Fall through. */ | |
252b5132 RH |
1340 | case STT_OBJECT: |
1341 | sym->symbol.flags |= BSF_OBJECT; | |
1342 | break; | |
0be9069d L |
1343 | case STT_TLS: |
1344 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1345 | break; | |
d9352518 DB |
1346 | case STT_RELC: |
1347 | sym->symbol.flags |= BSF_RELC; | |
1348 | break; | |
1349 | case STT_SRELC: | |
1350 | sym->symbol.flags |= BSF_SRELC; | |
1351 | break; | |
d8045f23 NC |
1352 | case STT_GNU_IFUNC: |
1353 | sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION; | |
1354 | break; | |
252b5132 RH |
1355 | } |
1356 | ||
1357 | if (dynamic) | |
1358 | sym->symbol.flags |= BSF_DYNAMIC; | |
1359 | ||
6cdc0ccc | 1360 | if (xver != NULL) |
252b5132 RH |
1361 | { |
1362 | Elf_Internal_Versym iversym; | |
1363 | ||
6cdc0ccc | 1364 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1365 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1366 | xver++; |
252b5132 RH |
1367 | } |
1368 | ||
1369 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1370 | if (ebd->elf_backend_symbol_processing) |
1371 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1372 | } |
1373 | } | |
1374 | ||
1375 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1376 | if (ebd->elf_backend_symbol_table_processing) |
1377 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1378 | |
1379 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1380 | ||
1381 | symcount = sym - symbase; | |
1382 | ||
1383 | /* Fill in the user's symbol pointer vector if needed. */ | |
1384 | if (symptrs) | |
1385 | { | |
1386 | long l = symcount; | |
1387 | ||
1388 | sym = symbase; | |
1389 | while (l-- > 0) | |
1390 | { | |
1391 | *symptrs++ = &sym->symbol; | |
1392 | sym++; | |
1393 | } | |
1394 | *symptrs = 0; /* Final null pointer */ | |
1395 | } | |
1396 | ||
6cdc0ccc AM |
1397 | if (xverbuf != NULL) |
1398 | free (xverbuf); | |
1399 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1400 | free (isymbuf); | |
252b5132 | 1401 | return symcount; |
9ad5cbcf | 1402 | |
252b5132 | 1403 | error_return: |
6cdc0ccc AM |
1404 | if (xverbuf != NULL) |
1405 | free (xverbuf); | |
1406 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1407 | free (isymbuf); | |
252b5132 RH |
1408 | return -1; |
1409 | } | |
1410 | ||
5c799c07 | 1411 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1412 | them. */ |
252b5132 | 1413 | |
b34976b6 | 1414 | static bfd_boolean |
268b6b39 AM |
1415 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1416 | asection *asect, | |
1417 | Elf_Internal_Shdr *rel_hdr, | |
1418 | bfd_size_type reloc_count, | |
1419 | arelent *relents, | |
1420 | asymbol **symbols, | |
1421 | bfd_boolean dynamic) | |
252b5132 | 1422 | { |
9c5bfbb7 | 1423 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1424 | void *allocated = NULL; |
252b5132 | 1425 | bfd_byte *native_relocs; |
252b5132 RH |
1426 | arelent *relent; |
1427 | unsigned int i; | |
1428 | int entsize; | |
5ad8645c | 1429 | unsigned int symcount; |
252b5132 | 1430 | |
268b6b39 | 1431 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1432 | if (allocated == NULL) |
1433 | goto error_return; | |
1434 | ||
1435 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1436 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1437 | != rel_hdr->sh_size)) |
1438 | goto error_return; | |
1439 | ||
a50b1753 | 1440 | native_relocs = (bfd_byte *) allocated; |
252b5132 | 1441 | |
252b5132 RH |
1442 | entsize = rel_hdr->sh_entsize; |
1443 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1444 | || entsize == sizeof (Elf_External_Rela)); | |
1445 | ||
5ad8645c AM |
1446 | if (dynamic) |
1447 | symcount = bfd_get_dynamic_symcount (abfd); | |
1448 | else | |
1449 | symcount = bfd_get_symcount (abfd); | |
1450 | ||
252b5132 RH |
1451 | for (i = 0, relent = relents; |
1452 | i < reloc_count; | |
1453 | i++, relent++, native_relocs += entsize) | |
1454 | { | |
1455 | Elf_Internal_Rela rela; | |
252b5132 RH |
1456 | |
1457 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1458 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1459 | else |
947216bf | 1460 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1461 | |
1462 | /* The address of an ELF reloc is section relative for an object | |
1463 | file, and absolute for an executable file or shared library. | |
1464 | The address of a normal BFD reloc is always section relative, | |
1465 | and the address of a dynamic reloc is absolute.. */ | |
1466 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1467 | relent->address = rela.r_offset; | |
1468 | else | |
1469 | relent->address = rela.r_offset - asect->vma; | |
1470 | ||
cf35638d | 1471 | if (ELF_R_SYM (rela.r_info) == STN_UNDEF) |
252b5132 | 1472 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
05a487dc | 1473 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1474 | { |
1475 | (*_bfd_error_handler) | |
1476 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1477 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1478 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1479 | } | |
252b5132 RH |
1480 | else |
1481 | { | |
b48c61bc | 1482 | asymbol **ps; |
28c9d252 | 1483 | |
252b5132 | 1484 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1485 | |
f9cfae62 | 1486 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1487 | } |
1488 | ||
1489 | relent->addend = rela.r_addend; | |
1490 | ||
90fff0d4 DJ |
1491 | if ((entsize == sizeof (Elf_External_Rela) |
1492 | && ebd->elf_info_to_howto != NULL) | |
1493 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1494 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1495 | else | |
947216bf | 1496 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1497 | } |
1498 | ||
252b5132 RH |
1499 | if (allocated != NULL) |
1500 | free (allocated); | |
1501 | ||
b34976b6 | 1502 | return TRUE; |
252b5132 RH |
1503 | |
1504 | error_return: | |
1505 | if (allocated != NULL) | |
1506 | free (allocated); | |
b34976b6 | 1507 | return FALSE; |
252b5132 RH |
1508 | } |
1509 | ||
42fdc509 MM |
1510 | /* Read in and swap the external relocs. */ |
1511 | ||
b34976b6 | 1512 | bfd_boolean |
268b6b39 AM |
1513 | elf_slurp_reloc_table (bfd *abfd, |
1514 | asection *asect, | |
1515 | asymbol **symbols, | |
1516 | bfd_boolean dynamic) | |
42fdc509 MM |
1517 | { |
1518 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1519 | Elf_Internal_Shdr *rel_hdr; | |
1520 | Elf_Internal_Shdr *rel_hdr2; | |
1521 | bfd_size_type reloc_count; | |
1522 | bfd_size_type reloc_count2; | |
1523 | arelent *relents; | |
dc810e39 | 1524 | bfd_size_type amt; |
42fdc509 MM |
1525 | |
1526 | if (asect->relocation != NULL) | |
b34976b6 | 1527 | return TRUE; |
42fdc509 MM |
1528 | |
1529 | if (! dynamic) | |
1530 | { | |
1531 | if ((asect->flags & SEC_RELOC) == 0 | |
1532 | || asect->reloc_count == 0) | |
b34976b6 | 1533 | return TRUE; |
42fdc509 | 1534 | |
d4730f92 BS |
1535 | rel_hdr = d->rel.hdr; |
1536 | reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0; | |
1537 | rel_hdr2 = d->rela.hdr; | |
1538 | reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0; | |
42fdc509 MM |
1539 | |
1540 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
d4730f92 | 1541 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
42fdc509 MM |
1542 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
1543 | ||
1544 | } | |
1545 | else | |
1546 | { | |
57e21bef MM |
1547 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1548 | case because relocations against this section may use the | |
1549 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1550 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1551 | if (asect->size == 0) |
b34976b6 | 1552 | return TRUE; |
42fdc509 MM |
1553 | |
1554 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1555 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1556 | rel_hdr2 = NULL; |
57e21bef | 1557 | reloc_count2 = 0; |
42fdc509 MM |
1558 | } |
1559 | ||
dc810e39 | 1560 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
a50b1753 | 1561 | relents = (arelent *) bfd_alloc (abfd, amt); |
42fdc509 | 1562 | if (relents == NULL) |
b34976b6 | 1563 | return FALSE; |
42fdc509 | 1564 | |
d4730f92 BS |
1565 | if (rel_hdr |
1566 | && !elf_slurp_reloc_table_from_section (abfd, asect, | |
1567 | rel_hdr, reloc_count, | |
1568 | relents, | |
1569 | symbols, dynamic)) | |
b34976b6 | 1570 | return FALSE; |
60bcf0fa NC |
1571 | |
1572 | if (rel_hdr2 | |
42fdc509 MM |
1573 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1574 | rel_hdr2, reloc_count2, | |
1575 | relents + reloc_count, | |
1576 | symbols, dynamic)) | |
b34976b6 | 1577 | return FALSE; |
42fdc509 | 1578 | |
42fdc509 | 1579 | asect->relocation = relents; |
b34976b6 | 1580 | return TRUE; |
42fdc509 MM |
1581 | } |
1582 | ||
e460dd0d | 1583 | #if DEBUG & 2 |
252b5132 | 1584 | static void |
268b6b39 | 1585 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1586 | { |
1587 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1588 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1589 | (long) hdr); | |
1590 | fprintf (stderr, | |
1591 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1592 | (long) hdr->sh_name, | |
1593 | (long) hdr->sh_type, | |
1594 | (long) hdr->sh_flags); | |
1595 | fprintf (stderr, | |
1596 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1597 | (long) hdr->sh_addr, | |
1598 | (long) hdr->sh_offset, | |
1599 | (long) hdr->sh_size); | |
1600 | fprintf (stderr, | |
1601 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1602 | (long) hdr->sh_link, | |
1603 | (long) hdr->sh_info, | |
1604 | (long) hdr->sh_addralign); | |
1605 | fprintf (stderr, "sh_entsize = %ld\n", | |
1606 | (long) hdr->sh_entsize); | |
1607 | fflush (stderr); | |
1608 | } | |
e460dd0d | 1609 | #endif |
252b5132 | 1610 | |
e460dd0d | 1611 | #if DEBUG & 1 |
252b5132 | 1612 | static void |
268b6b39 | 1613 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1614 | { |
1615 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1616 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1617 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1618 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1619 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1620 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1621 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1622 | } | |
252b5132 RH |
1623 | #endif |
1624 | \f | |
8d6337fe RM |
1625 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1626 | reconstruct an ELF file by reading the segments out of remote memory | |
1627 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1628 | points to. If not null, *LOADBASEP is filled in with the difference | |
1629 | between the VMAs from which the segments were read, and the VMAs the | |
1630 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1631 | ||
1632 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1633 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1634 | should return zero on success or an `errno' code on failure. TEMPL must | |
1635 | be a BFD for a target with the word size and byte order found in the | |
1636 | remote memory. */ | |
1637 | ||
1638 | bfd * | |
268b6b39 AM |
1639 | NAME(_bfd_elf,bfd_from_remote_memory) |
1640 | (bfd *templ, | |
1641 | bfd_vma ehdr_vma, | |
1642 | bfd_vma *loadbasep, | |
f075ee0c | 1643 | int (*target_read_memory) (bfd_vma, bfd_byte *, int)) |
8d6337fe RM |
1644 | { |
1645 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1646 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1647 | Elf_External_Phdr *x_phdrs; | |
1648 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1649 | bfd *nbfd; | |
1650 | struct bfd_in_memory *bim; | |
1651 | int contents_size; | |
f075ee0c | 1652 | bfd_byte *contents; |
8d6337fe RM |
1653 | int err; |
1654 | unsigned int i; | |
1655 | bfd_vma loadbase; | |
3fec76aa | 1656 | bfd_boolean loadbase_set; |
8d6337fe RM |
1657 | |
1658 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1659 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1660 | if (err) |
1661 | { | |
1662 | bfd_set_error (bfd_error_system_call); | |
1663 | errno = err; | |
1664 | return NULL; | |
1665 | } | |
1666 | ||
1667 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1668 | make use of. The magic number must match, the address size ('class') | |
1669 | and byte-swapping must match our XVEC entry. */ | |
1670 | ||
1671 | if (! elf_file_p (&x_ehdr) | |
1672 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1673 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1674 | { | |
1675 | bfd_set_error (bfd_error_wrong_format); | |
1676 | return NULL; | |
1677 | } | |
1678 | ||
1679 | /* Check that file's byte order matches xvec's */ | |
1680 | switch (x_ehdr.e_ident[EI_DATA]) | |
1681 | { | |
1682 | case ELFDATA2MSB: /* Big-endian */ | |
1683 | if (! bfd_header_big_endian (templ)) | |
1684 | { | |
1685 | bfd_set_error (bfd_error_wrong_format); | |
1686 | return NULL; | |
1687 | } | |
1688 | break; | |
1689 | case ELFDATA2LSB: /* Little-endian */ | |
1690 | if (! bfd_header_little_endian (templ)) | |
1691 | { | |
1692 | bfd_set_error (bfd_error_wrong_format); | |
1693 | return NULL; | |
1694 | } | |
1695 | break; | |
1696 | case ELFDATANONE: /* No data encoding specified */ | |
1697 | default: /* Unknown data encoding specified */ | |
1698 | bfd_set_error (bfd_error_wrong_format); | |
1699 | return NULL; | |
1700 | } | |
1701 | ||
1702 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1703 | ||
1704 | /* The file header tells where to find the program headers. | |
1705 | These are what we use to actually choose what to read. */ | |
1706 | ||
1707 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1708 | { | |
1709 | bfd_set_error (bfd_error_wrong_format); | |
1710 | return NULL; | |
1711 | } | |
1712 | ||
a50b1753 NC |
1713 | x_phdrs = (Elf_External_Phdr *) |
1714 | bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); | |
8d6337fe RM |
1715 | if (x_phdrs == NULL) |
1716 | { | |
1717 | bfd_set_error (bfd_error_no_memory); | |
1718 | return NULL; | |
1719 | } | |
f075ee0c | 1720 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1721 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1722 | if (err) | |
1723 | { | |
1724 | free (x_phdrs); | |
1725 | bfd_set_error (bfd_error_system_call); | |
1726 | errno = err; | |
1727 | return NULL; | |
1728 | } | |
1729 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1730 | ||
1731 | contents_size = 0; | |
1732 | last_phdr = NULL; | |
1733 | loadbase = ehdr_vma; | |
3fec76aa | 1734 | loadbase_set = FALSE; |
8d6337fe RM |
1735 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1736 | { | |
1737 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1738 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1739 | { |
1740 | bfd_vma segment_end; | |
1741 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1742 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1743 | if (segment_end > (bfd_vma) contents_size) | |
1744 | contents_size = segment_end; | |
1745 | ||
3fec76aa JK |
1746 | /* LOADADDR is the `Base address' from the gELF specification: |
1747 | `lowest p_vaddr value for a PT_LOAD segment' is P_VADDR from the | |
1748 | first PT_LOAD as PT_LOADs are ordered by P_VADDR. */ | |
1749 | if (!loadbase_set && (i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1750 | { | |
1751 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1752 | loadbase_set = TRUE; | |
1753 | } | |
8d6337fe RM |
1754 | |
1755 | last_phdr = &i_phdrs[i]; | |
1756 | } | |
1757 | } | |
1758 | if (last_phdr == NULL) | |
1759 | { | |
1760 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1761 | free (x_phdrs); | |
1762 | bfd_set_error (bfd_error_wrong_format); | |
1763 | return NULL; | |
1764 | } | |
1765 | ||
1766 | /* Trim the last segment so we don't bother with zeros in the last page | |
1767 | that are off the end of the file. However, if the extra bit in that | |
1768 | page includes the section headers, keep them. */ | |
1769 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1770 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1771 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1772 | { | |
1773 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1774 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1775 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1776 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1777 | } | |
1778 | else | |
1779 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1780 | ||
1781 | /* Now we know the size of the whole image we want read in. */ | |
a50b1753 | 1782 | contents = (bfd_byte *) bfd_zmalloc (contents_size); |
8d6337fe RM |
1783 | if (contents == NULL) |
1784 | { | |
1785 | free (x_phdrs); | |
1786 | bfd_set_error (bfd_error_no_memory); | |
1787 | return NULL; | |
1788 | } | |
1789 | ||
1790 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1791 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1792 | { |
1793 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1794 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1795 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1796 | if (end > (bfd_vma) contents_size) | |
1797 | end = contents_size; | |
1798 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1799 | & -i_phdrs[i].p_align, | |
1800 | contents + start, end - start); | |
1801 | if (err) | |
1802 | { | |
1803 | free (x_phdrs); | |
1804 | free (contents); | |
1805 | bfd_set_error (bfd_error_system_call); | |
1806 | errno = err; | |
1807 | return NULL; | |
1808 | } | |
1809 | } | |
1810 | free (x_phdrs); | |
1811 | ||
1812 | /* If the segments visible in memory didn't include the section headers, | |
1813 | then clear them from the file header. */ | |
1814 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1815 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1816 | { | |
1817 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1818 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1819 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1820 | } | |
1821 | ||
1822 | /* This will normally have been in the first PT_LOAD segment. But it | |
1823 | conceivably could be missing, and we might have just changed it. */ | |
1824 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1825 | ||
1826 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
a50b1753 | 1827 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1828 | if (bim == NULL) |
1829 | { | |
1830 | free (contents); | |
1831 | bfd_set_error (bfd_error_no_memory); | |
1832 | return NULL; | |
1833 | } | |
1834 | nbfd = _bfd_new_bfd (); | |
1835 | if (nbfd == NULL) | |
1836 | { | |
1837 | free (bim); | |
1838 | free (contents); | |
1839 | bfd_set_error (bfd_error_no_memory); | |
1840 | return NULL; | |
1841 | } | |
1842 | nbfd->filename = "<in-memory>"; | |
1843 | nbfd->xvec = templ->xvec; | |
1844 | bim->size = contents_size; | |
1845 | bim->buffer = contents; | |
268b6b39 | 1846 | nbfd->iostream = bim; |
8d6337fe | 1847 | nbfd->flags = BFD_IN_MEMORY; |
65077aa8 TG |
1848 | nbfd->iovec = &_bfd_memory_iovec; |
1849 | nbfd->origin = 0; | |
8d6337fe RM |
1850 | nbfd->direction = read_direction; |
1851 | nbfd->mtime = time (NULL); | |
1852 | nbfd->mtime_set = TRUE; | |
1853 | ||
1854 | if (loadbasep) | |
1855 | *loadbasep = loadbase; | |
1856 | return nbfd; | |
1857 | } | |
1858 | \f | |
252b5132 | 1859 | #include "elfcore.h" |
252b5132 RH |
1860 | \f |
1861 | /* Size-dependent data and functions. */ | |
1862 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1863 | sizeof (Elf_External_Ehdr), | |
1864 | sizeof (Elf_External_Phdr), | |
1865 | sizeof (Elf_External_Shdr), | |
1866 | sizeof (Elf_External_Rel), | |
1867 | sizeof (Elf_External_Rela), | |
1868 | sizeof (Elf_External_Sym), | |
1869 | sizeof (Elf_External_Dyn), | |
1870 | sizeof (Elf_External_Note), | |
70bcb145 | 1871 | 4, |
c7ac6ff8 | 1872 | 1, |
45d6a902 | 1873 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1874 | ELFCLASS, EV_CURRENT, |
1875 | elf_write_out_phdrs, | |
1876 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1877 | elf_checksum_contents, |
b9f66672 | 1878 | elf_write_relocs, |
73ff0d56 | 1879 | elf_swap_symbol_in, |
252b5132 RH |
1880 | elf_swap_symbol_out, |
1881 | elf_slurp_reloc_table, | |
1882 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1883 | elf_swap_dyn_in, |
1884 | elf_swap_dyn_out, | |
947216bf AM |
1885 | elf_swap_reloc_in, |
1886 | elf_swap_reloc_out, | |
1887 | elf_swap_reloca_in, | |
1888 | elf_swap_reloca_out | |
252b5132 | 1889 | }; |