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