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, |
02d00247 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
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); | |
35fc36a8 | 201 | dst->st_target_internal = 0; |
8384fb8f | 202 | return TRUE; |
252b5132 RH |
203 | } |
204 | ||
205 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 206 | format. */ |
252b5132 RH |
207 | |
208 | void | |
268b6b39 AM |
209 | elf_swap_symbol_out (bfd *abfd, |
210 | const Elf_Internal_Sym *src, | |
211 | void *cdst, | |
212 | void *shndx) | |
252b5132 | 213 | { |
9ad5cbcf | 214 | unsigned int tmp; |
a50b1753 | 215 | Elf_External_Sym *dst = (Elf_External_Sym *) cdst; |
dc810e39 AM |
216 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
217 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
218 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
219 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
220 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf | 221 | tmp = src->st_shndx; |
4fbb74a6 | 222 | if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE) |
9ad5cbcf AM |
223 | { |
224 | if (shndx == NULL) | |
225 | abort (); | |
226 | H_PUT_32 (abfd, tmp, shndx); | |
4fbb74a6 | 227 | tmp = SHN_XINDEX & 0xffff; |
9ad5cbcf AM |
228 | } |
229 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
230 | } |
231 | ||
252b5132 | 232 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 233 | internal format. */ |
252b5132 RH |
234 | |
235 | static void | |
268b6b39 AM |
236 | elf_swap_ehdr_in (bfd *abfd, |
237 | const Elf_External_Ehdr *src, | |
238 | Elf_Internal_Ehdr *dst) | |
252b5132 | 239 | { |
448cafa4 | 240 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 241 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
242 | dst->e_type = H_GET_16 (abfd, src->e_type); |
243 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
244 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 245 | if (signed_vma) |
dc810e39 | 246 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 247 | else |
dc810e39 AM |
248 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
249 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
250 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
251 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
252 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
253 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
254 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
255 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
256 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
257 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
258 | } |
259 | ||
260 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 261 | external format. */ |
252b5132 RH |
262 | |
263 | static void | |
268b6b39 AM |
264 | elf_swap_ehdr_out (bfd *abfd, |
265 | const Elf_Internal_Ehdr *src, | |
266 | Elf_External_Ehdr *dst) | |
252b5132 | 267 | { |
5732c114 | 268 | unsigned int tmp; |
448cafa4 | 269 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 270 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 271 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
272 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
273 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
274 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 275 | if (signed_vma) |
dc810e39 | 276 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 277 | else |
dc810e39 AM |
278 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
279 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
280 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
281 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
282 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
283 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
ecd12bc1 AM |
284 | tmp = src->e_phnum; |
285 | if (tmp > PN_XNUM) | |
286 | tmp = PN_XNUM; | |
287 | H_PUT_16 (abfd, tmp, dst->e_phnum); | |
dc810e39 | 288 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); |
5732c114 | 289 | tmp = src->e_shnum; |
4fbb74a6 | 290 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
291 | tmp = SHN_UNDEF; |
292 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
293 | tmp = src->e_shstrndx; | |
4fbb74a6 AM |
294 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
295 | tmp = SHN_XINDEX & 0xffff; | |
5732c114 | 296 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); |
252b5132 RH |
297 | } |
298 | ||
252b5132 | 299 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 300 | ELF section header table entry in internal format. */ |
252b5132 RH |
301 | |
302 | static void | |
268b6b39 AM |
303 | elf_swap_shdr_in (bfd *abfd, |
304 | const Elf_External_Shdr *src, | |
305 | Elf_Internal_Shdr *dst) | |
252b5132 | 306 | { |
86dc0f79 RH |
307 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
308 | ||
dc810e39 AM |
309 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
310 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
311 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 312 | if (signed_vma) |
dc810e39 | 313 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 314 | else |
dc810e39 AM |
315 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
316 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
317 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
318 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
319 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
320 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
321 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
322 | dst->bfd_section = NULL; |
323 | dst->contents = NULL; | |
324 | } | |
325 | ||
326 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 327 | ELF section header table entry in external format. */ |
252b5132 RH |
328 | |
329 | static void | |
268b6b39 AM |
330 | elf_swap_shdr_out (bfd *abfd, |
331 | const Elf_Internal_Shdr *src, | |
332 | Elf_External_Shdr *dst) | |
252b5132 | 333 | { |
3e932841 | 334 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
335 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
336 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
337 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
338 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
339 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
340 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
341 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
342 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
343 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
344 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
345 | } |
346 | ||
252b5132 | 347 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 348 | ELF program header table entry in internal format. */ |
252b5132 RH |
349 | |
350 | void | |
268b6b39 AM |
351 | elf_swap_phdr_in (bfd *abfd, |
352 | const Elf_External_Phdr *src, | |
353 | Elf_Internal_Phdr *dst) | |
252b5132 | 354 | { |
86dc0f79 RH |
355 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
356 | ||
dc810e39 AM |
357 | dst->p_type = H_GET_32 (abfd, src->p_type); |
358 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
359 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
360 | if (signed_vma) |
361 | { | |
dc810e39 AM |
362 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
363 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
364 | } |
365 | else | |
366 | { | |
dc810e39 AM |
367 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
368 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 369 | } |
dc810e39 AM |
370 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
371 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
372 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
373 | } |
374 | ||
375 | void | |
268b6b39 AM |
376 | elf_swap_phdr_out (bfd *abfd, |
377 | const Elf_Internal_Phdr *src, | |
378 | Elf_External_Phdr *dst) | |
252b5132 | 379 | { |
147d51c2 L |
380 | const struct elf_backend_data *bed; |
381 | bfd_vma p_paddr; | |
382 | ||
383 | bed = get_elf_backend_data (abfd); | |
384 | p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr; | |
385 | ||
3e932841 | 386 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
387 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
388 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
389 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
147d51c2 | 390 | H_PUT_WORD (abfd, p_paddr, dst->p_paddr); |
dc810e39 AM |
391 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); |
392 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
393 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
394 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
395 | } |
396 | ||
3e932841 | 397 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 398 | void |
268b6b39 AM |
399 | elf_swap_reloc_in (bfd *abfd, |
400 | const bfd_byte *s, | |
401 | Elf_Internal_Rela *dst) | |
252b5132 | 402 | { |
947216bf | 403 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
404 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
405 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 406 | dst->r_addend = 0; |
252b5132 RH |
407 | } |
408 | ||
947216bf | 409 | void |
268b6b39 AM |
410 | elf_swap_reloca_in (bfd *abfd, |
411 | const bfd_byte *s, | |
412 | Elf_Internal_Rela *dst) | |
252b5132 | 413 | { |
947216bf | 414 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
415 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
416 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
417 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
418 | } |
419 | ||
3e932841 | 420 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 421 | void |
268b6b39 AM |
422 | elf_swap_reloc_out (bfd *abfd, |
423 | const Elf_Internal_Rela *src, | |
424 | bfd_byte *d) | |
252b5132 | 425 | { |
947216bf | 426 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
427 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
428 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
429 | } |
430 | ||
947216bf | 431 | void |
268b6b39 AM |
432 | elf_swap_reloca_out (bfd *abfd, |
433 | const Elf_Internal_Rela *src, | |
434 | bfd_byte *d) | |
252b5132 | 435 | { |
947216bf | 436 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
437 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
438 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
439 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
440 | } |
441 | ||
268b6b39 AM |
442 | void |
443 | elf_swap_dyn_in (bfd *abfd, | |
444 | const void *p, | |
445 | Elf_Internal_Dyn *dst) | |
252b5132 | 446 | { |
a50b1753 | 447 | const Elf_External_Dyn *src = (const Elf_External_Dyn *) p; |
252b5132 | 448 | |
dc810e39 AM |
449 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
450 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
451 | } |
452 | ||
268b6b39 AM |
453 | void |
454 | elf_swap_dyn_out (bfd *abfd, | |
455 | const Elf_Internal_Dyn *src, | |
456 | void *p) | |
252b5132 | 457 | { |
a50b1753 | 458 | Elf_External_Dyn *dst = (Elf_External_Dyn *) p; |
c7ac6ff8 | 459 | |
dc810e39 AM |
460 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
461 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
462 | } |
463 | \f | |
464 | /* ELF .o/exec file reading */ | |
465 | ||
252b5132 RH |
466 | /* Begin processing a given object. |
467 | ||
468 | First we validate the file by reading in the ELF header and checking | |
469 | the magic number. */ | |
470 | ||
268b6b39 AM |
471 | static inline bfd_boolean |
472 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
473 | { |
474 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
475 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
476 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
477 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
478 | } | |
479 | ||
480 | /* Check to see if the file associated with ABFD matches the target vector | |
481 | that ABFD points to. | |
482 | ||
483 | Note that we may be called several times with the same ABFD, but different | |
484 | target vectors, most of which will not match. We have to avoid leaving | |
485 | any side effects in ABFD, or any data it points to (like tdata), if the | |
486 | file does not match the target vector. */ | |
487 | ||
488 | const bfd_target * | |
268b6b39 | 489 | elf_object_p (bfd *abfd) |
252b5132 RH |
490 | { |
491 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
492 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
493 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 494 | Elf_Internal_Shdr i_shdr; |
ed591155 | 495 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 496 | unsigned int shindex; |
9c5bfbb7 | 497 | const struct elf_backend_data *ebd; |
ed591155 | 498 | struct bfd_preserve preserve; |
252b5132 | 499 | asection *s; |
dc810e39 | 500 | bfd_size_type amt; |
d1036acb | 501 | const bfd_target *target; |
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 | |
0aabe54e AM |
590 | || i_ehdrp->e_machine != ebd->elf_machine_alt2) |
591 | && ebd->elf_machine_code != EM_NONE) | |
592 | goto got_wrong_format_error; | |
252b5132 RH |
593 | |
594 | if (i_ehdrp->e_type == ET_EXEC) | |
595 | abfd->flags |= EXEC_P; | |
596 | else if (i_ehdrp->e_type == ET_DYN) | |
597 | abfd->flags |= DYNAMIC; | |
598 | ||
599 | if (i_ehdrp->e_phnum > 0) | |
600 | abfd->flags |= D_PAGED; | |
601 | ||
602 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
603 | { | |
604 | /* It's OK if this fails for the generic target. */ | |
605 | if (ebd->elf_machine_code != EM_NONE) | |
606 | goto got_no_match; | |
607 | } | |
608 | ||
d1036acb | 609 | if (ebd->elf_machine_code != EM_NONE |
0aabe54e AM |
610 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi |
611 | && ebd->elf_osabi != ELFOSABI_NONE) | |
612 | goto got_wrong_format_error; | |
d1036acb | 613 | |
7ece0d85 JJ |
614 | if (i_ehdrp->e_shoff != 0) |
615 | { | |
0560d0f7 AM |
616 | bfd_signed_vma where = i_ehdrp->e_shoff; |
617 | ||
618 | if (where != (file_ptr) where) | |
619 | goto got_wrong_format_error; | |
620 | ||
7ece0d85 | 621 | /* Seek to the section header table in the file. */ |
0560d0f7 | 622 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) |
7ece0d85 | 623 | goto got_no_match; |
5732c114 | 624 | |
7ece0d85 JJ |
625 | /* Read the first section header at index 0, and convert to internal |
626 | form. */ | |
268b6b39 | 627 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
628 | goto got_no_match; |
629 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 630 | |
7ece0d85 JJ |
631 | /* If the section count is zero, the actual count is in the first |
632 | section header. */ | |
633 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
634 | { |
635 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
24639c7d JJ |
636 | if (i_ehdrp->e_shnum != i_shdr.sh_size |
637 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
638 | goto got_wrong_format_error; |
639 | } | |
5732c114 | 640 | |
7ece0d85 | 641 | /* And similarly for the string table index. */ |
4fbb74a6 | 642 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
643 | { |
644 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
645 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
646 | goto got_wrong_format_error; | |
647 | } | |
648 | ||
ecd12bc1 AM |
649 | /* And program headers. */ |
650 | if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0) | |
651 | { | |
652 | i_ehdrp->e_phnum = i_shdr.sh_info; | |
653 | if (i_ehdrp->e_phnum != i_shdr.sh_info) | |
654 | goto got_wrong_format_error; | |
655 | } | |
656 | ||
0560d0f7 AM |
657 | /* Sanity check that we can read all of the section headers. |
658 | It ought to be good enough to just read the last one. */ | |
659 | if (i_ehdrp->e_shnum != 1) | |
660 | { | |
661 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
662 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
663 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
664 | goto got_wrong_format_error; |
665 | ||
666 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
667 | if (where != (file_ptr) where) | |
668 | goto got_wrong_format_error; | |
669 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) | |
670 | goto got_wrong_format_error; | |
671 | ||
672 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
673 | goto got_no_match; | |
674 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
675 | goto got_no_match; | |
676 | ||
677 | /* Back to where we were. */ | |
678 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
679 | if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0) | |
680 | goto got_no_match; | |
681 | } | |
7ece0d85 | 682 | } |
5732c114 | 683 | |
252b5132 | 684 | /* Allocate space for a copy of the section header table in |
5732c114 | 685 | internal form. */ |
0c35f01a AM |
686 | if (i_ehdrp->e_shnum != 0) |
687 | { | |
5732c114 | 688 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 689 | unsigned int num_sec; |
5732c114 | 690 | |
0c35f01a | 691 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
a50b1753 | 692 | i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt); |
5732c114 AM |
693 | if (!i_shdrp) |
694 | goto got_no_match; | |
9ad5cbcf | 695 | num_sec = i_ehdrp->e_shnum; |
9ad5cbcf AM |
696 | elf_numsections (abfd) = num_sec; |
697 | amt = sizeof (i_shdrp) * num_sec; | |
a50b1753 | 698 | elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt); |
5732c114 | 699 | if (!elf_elfsections (abfd)) |
0c35f01a | 700 | goto got_no_match; |
5732c114 AM |
701 | |
702 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
4fbb74a6 | 703 | for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++) |
5732c114 | 704 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 705 | |
ed591155 AM |
706 | /* Read in the rest of the section header table and convert it |
707 | to internal form. */ | |
708 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
709 | { | |
268b6b39 | 710 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
711 | goto got_no_match; |
712 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
713 | ||
24639c7d | 714 | /* Sanity check sh_link and sh_info. */ |
4fbb74a6 | 715 | if (i_shdrp[shindex].sh_link >= num_sec) |
cfcac11d | 716 | { |
caa83f8b | 717 | /* PR 10478: Accept Solaris binaries with a sh_link |
cfcac11d NC |
718 | field set to SHN_BEFORE or SHN_AFTER. */ |
719 | switch (ebd->elf_machine_code) | |
720 | { | |
caa83f8b NC |
721 | case EM_386: |
722 | case EM_486: | |
723 | case EM_X86_64: | |
cfcac11d NC |
724 | case EM_OLD_SPARCV9: |
725 | case EM_SPARC32PLUS: | |
726 | case EM_SPARCV9: | |
727 | case EM_SPARC: | |
728 | if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */ | |
729 | || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */) | |
730 | break; | |
731 | /* Otherwise fall through. */ | |
732 | default: | |
733 | goto got_wrong_format_error; | |
734 | } | |
735 | } | |
24639c7d JJ |
736 | |
737 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
738 | || i_shdrp[shindex].sh_type == SHT_RELA | |
739 | || i_shdrp[shindex].sh_type == SHT_REL) | |
4fbb74a6 | 740 | && i_shdrp[shindex].sh_info >= num_sec) |
24639c7d JJ |
741 | goto got_wrong_format_error; |
742 | ||
ed591155 AM |
743 | /* If the section is loaded, but not page aligned, clear |
744 | D_PAGED. */ | |
745 | if (i_shdrp[shindex].sh_size != 0 | |
746 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
747 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
748 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 749 | % ebd->minpagesize) |
ed591155 AM |
750 | != 0)) |
751 | abfd->flags &= ~D_PAGED; | |
752 | } | |
252b5132 | 753 | } |
ed591155 | 754 | |
24639c7d JJ |
755 | /* A further sanity check. */ |
756 | if (i_ehdrp->e_shnum != 0) | |
757 | { | |
4fbb74a6 | 758 | if (i_ehdrp->e_shstrndx >= elf_numsections (abfd)) |
0b49d371 NC |
759 | { |
760 | /* PR 2257: | |
761 | We used to just goto got_wrong_format_error here | |
762 | but there are binaries in existance for which this test | |
763 | will prevent the binutils from working with them at all. | |
764 | So we are kind, and reset the string index value to 0 | |
765 | so that at least some processing can be done. */ | |
766 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
767 | _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename); | |
768 | } | |
24639c7d | 769 | } |
0b49d371 | 770 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
771 | goto got_wrong_format_error; |
772 | ||
252b5132 RH |
773 | /* Read in the program headers. */ |
774 | if (i_ehdrp->e_phnum == 0) | |
775 | elf_tdata (abfd)->phdr = NULL; | |
776 | else | |
777 | { | |
778 | Elf_Internal_Phdr *i_phdr; | |
779 | unsigned int i; | |
780 | ||
dc810e39 | 781 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
a50b1753 | 782 | elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt); |
252b5132 RH |
783 | if (elf_tdata (abfd)->phdr == NULL) |
784 | goto got_no_match; | |
dc810e39 | 785 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
786 | goto got_no_match; |
787 | i_phdr = elf_tdata (abfd)->phdr; | |
788 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
789 | { | |
790 | Elf_External_Phdr x_phdr; | |
791 | ||
268b6b39 | 792 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
793 | goto got_no_match; |
794 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
795 | } | |
796 | } | |
797 | ||
1b3a8575 | 798 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 799 | { |
9ad5cbcf AM |
800 | unsigned int num_sec; |
801 | ||
0c35f01a AM |
802 | /* Once all of the section headers have been read and converted, we |
803 | can start processing them. Note that the first section header is | |
804 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
805 | num_sec = elf_numsections (abfd); |
806 | for (shindex = 1; shindex < num_sec; shindex++) | |
4fbb74a6 AM |
807 | if (!bfd_section_from_shdr (abfd, shindex)) |
808 | goto got_no_match; | |
3d7f7666 | 809 | |
dd863624 L |
810 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
811 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 812 | goto got_wrong_format_error; |
252b5132 RH |
813 | } |
814 | ||
815 | /* Let the backend double check the format and override global | |
816 | information. */ | |
817 | if (ebd->elf_backend_object_p) | |
818 | { | |
82e51918 | 819 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
820 | goto got_wrong_format_error; |
821 | } | |
822 | ||
a14199db AM |
823 | /* Remember the entry point specified in the ELF file header. */ |
824 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
825 | ||
252b5132 RH |
826 | /* If we have created any reloc sections that are associated with |
827 | debugging sections, mark the reloc sections as debugging as well. */ | |
828 | for (s = abfd->sections; s != NULL; s = s->next) | |
829 | { | |
830 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
831 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
832 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
833 | { | |
834 | unsigned long targ_index; | |
835 | asection *targ_sec; | |
836 | ||
837 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
838 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
839 | if (targ_sec != NULL | |
840 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
841 | s->flags |= SEC_DEBUGGING; | |
842 | } | |
843 | } | |
844 | ||
e84d6fca | 845 | bfd_preserve_finish (abfd, &preserve); |
d1036acb | 846 | return target; |
252b5132 RH |
847 | |
848 | got_wrong_format_error: | |
a77a9fef HPN |
849 | /* There is way too much undoing of half-known state here. The caller, |
850 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
851 | check match/no-match like it does. We have to rely on that a call to | |
852 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
853 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
854 | For this to work, only elf-data and the mach may be changed by the | |
855 | target-specific elf_backend_object_p function. Note that saving the | |
856 | whole bfd here and restoring it would be even worse; the first thing | |
857 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 858 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 859 | |
252b5132 | 860 | got_no_match: |
e84d6fca AM |
861 | if (preserve.marker != NULL) |
862 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 863 | return NULL; |
252b5132 RH |
864 | } |
865 | \f | |
866 | /* ELF .o/exec file writing */ | |
867 | ||
868 | /* Write out the relocs. */ | |
869 | ||
b9f66672 | 870 | void |
268b6b39 | 871 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 872 | { |
a50b1753 | 873 | bfd_boolean *failedp = (bfd_boolean *) data; |
252b5132 | 874 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 875 | bfd_vma addr_offset; |
c39a58e6 | 876 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
877 | size_t extsize; |
878 | bfd_byte *dst_rela; | |
252b5132 | 879 | unsigned int idx; |
947216bf AM |
880 | asymbol *last_sym; |
881 | int last_sym_idx; | |
252b5132 RH |
882 | |
883 | /* If we have already failed, don't do anything. */ | |
884 | if (*failedp) | |
885 | return; | |
886 | ||
887 | if ((sec->flags & SEC_RELOC) == 0) | |
888 | return; | |
889 | ||
890 | /* The linker backend writes the relocs out itself, and sets the | |
891 | reloc_count field to zero to inhibit writing them here. Also, | |
892 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
893 | relocs. */ | |
894 | if (sec->reloc_count == 0) | |
895 | return; | |
896 | ||
9a44bbd9 DJ |
897 | /* If we have opened an existing file for update, reloc_count may be |
898 | set even though we are not linking. In that case we have nothing | |
899 | to do. */ | |
900 | if (sec->orelocation == NULL) | |
901 | return; | |
902 | ||
d4730f92 BS |
903 | rela_hdr = elf_section_data (sec)->rela.hdr; |
904 | if (rela_hdr == NULL) | |
905 | rela_hdr = elf_section_data (sec)->rel.hdr; | |
252b5132 RH |
906 | |
907 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
a50b1753 | 908 | rela_hdr->contents = (unsigned char *) bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
909 | if (rela_hdr->contents == NULL) |
910 | { | |
b34976b6 | 911 | *failedp = TRUE; |
252b5132 RH |
912 | return; |
913 | } | |
914 | ||
bf572ba0 MM |
915 | /* Figure out whether the relocations are RELA or REL relocations. */ |
916 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
917 | { |
918 | swap_out = elf_swap_reloca_out; | |
919 | extsize = sizeof (Elf_External_Rela); | |
920 | } | |
bf572ba0 | 921 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
922 | { |
923 | swap_out = elf_swap_reloc_out; | |
924 | extsize = sizeof (Elf_External_Rel); | |
925 | } | |
bf572ba0 MM |
926 | else |
927 | /* Every relocation section should be either an SHT_RELA or an | |
928 | SHT_REL section. */ | |
929 | abort (); | |
930 | ||
947216bf AM |
931 | /* The address of an ELF reloc is section relative for an object |
932 | file, and absolute for an executable file or shared library. | |
933 | The address of a BFD reloc is always section relative. */ | |
934 | addr_offset = 0; | |
935 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
936 | addr_offset = sec->vma; | |
937 | ||
3e932841 | 938 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
939 | last_sym = 0; |
940 | last_sym_idx = 0; | |
941 | dst_rela = rela_hdr->contents; | |
252b5132 | 942 | |
947216bf AM |
943 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
944 | { | |
945 | Elf_Internal_Rela src_rela; | |
946 | arelent *ptr; | |
947 | asymbol *sym; | |
948 | int n; | |
949 | ||
950 | ptr = sec->orelocation[idx]; | |
951 | sym = *ptr->sym_ptr_ptr; | |
952 | if (sym == last_sym) | |
953 | n = last_sym_idx; | |
954 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
955 | n = STN_UNDEF; | |
956 | else | |
252b5132 | 957 | { |
947216bf AM |
958 | last_sym = sym; |
959 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
960 | if (n < 0) | |
252b5132 | 961 | { |
b34976b6 | 962 | *failedp = TRUE; |
252b5132 RH |
963 | return; |
964 | } | |
947216bf | 965 | last_sym_idx = n; |
252b5132 | 966 | } |
252b5132 | 967 | |
947216bf AM |
968 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
969 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
970 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 971 | { |
b34976b6 | 972 | *failedp = TRUE; |
947216bf | 973 | return; |
252b5132 | 974 | } |
947216bf AM |
975 | |
976 | src_rela.r_offset = ptr->address + addr_offset; | |
977 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
978 | src_rela.r_addend = ptr->addend; | |
979 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
980 | } |
981 | } | |
982 | ||
983 | /* Write out the program headers. */ | |
984 | ||
985 | int | |
268b6b39 AM |
986 | elf_write_out_phdrs (bfd *abfd, |
987 | const Elf_Internal_Phdr *phdr, | |
988 | unsigned int count) | |
252b5132 RH |
989 | { |
990 | while (count--) | |
991 | { | |
992 | Elf_External_Phdr extphdr; | |
993 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
994 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
995 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
996 | return -1; |
997 | phdr++; | |
998 | } | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | /* Write out the section headers and the ELF file header. */ | |
1003 | ||
b34976b6 | 1004 | bfd_boolean |
268b6b39 | 1005 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1006 | { |
1007 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1008 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1009 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1010 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1011 | unsigned int count; | |
dc810e39 | 1012 | bfd_size_type amt; |
252b5132 RH |
1013 | |
1014 | i_ehdrp = elf_elfheader (abfd); | |
1015 | i_shdrp = elf_elfsections (abfd); | |
1016 | ||
3e932841 | 1017 | /* swap the header before spitting it out... */ |
252b5132 RH |
1018 | |
1019 | #if DEBUG & 1 | |
1020 | elf_debug_file (i_ehdrp); | |
1021 | #endif | |
1022 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1023 | amt = sizeof (x_ehdr); |
252b5132 | 1024 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1025 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1026 | return FALSE; |
252b5132 | 1027 | |
5732c114 AM |
1028 | /* Some fields in the first section header handle overflow of ehdr |
1029 | fields. */ | |
ecd12bc1 AM |
1030 | if (i_ehdrp->e_phnum >= PN_XNUM) |
1031 | i_shdrp[0]->sh_info = i_ehdrp->e_phnum; | |
4fbb74a6 | 1032 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1033 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1034 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1035 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1036 | ||
3e932841 | 1037 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1038 | amt = i_ehdrp->e_shnum; |
1039 | amt *= sizeof (*x_shdrp); | |
a50b1753 | 1040 | x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt); |
252b5132 | 1041 | if (!x_shdrp) |
b34976b6 | 1042 | return FALSE; |
252b5132 | 1043 | |
5732c114 | 1044 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1045 | { |
1046 | #if DEBUG & 2 | |
5732c114 | 1047 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1048 | #endif |
5732c114 | 1049 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
252b5132 RH |
1050 | } |
1051 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 1052 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1053 | return FALSE; |
252b5132 | 1054 | |
3e932841 | 1055 | /* need to dump the string table too... */ |
252b5132 | 1056 | |
b34976b6 | 1057 | return TRUE; |
252b5132 RH |
1058 | } |
1059 | ||
d94838b1 RM |
1060 | bfd_boolean |
1061 | elf_checksum_contents (bfd *abfd, | |
1062 | void (*process) (const void *, size_t, void *), | |
1063 | void *arg) | |
1064 | { | |
1065 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1066 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1067 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1068 | unsigned int count, num; | |
1069 | ||
1070 | { | |
1071 | Elf_External_Ehdr x_ehdr; | |
1072 | Elf_Internal_Ehdr i_ehdr; | |
1073 | ||
1074 | i_ehdr = *i_ehdrp; | |
1075 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1076 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1077 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1078 | } | |
1079 | ||
1080 | num = i_ehdrp->e_phnum; | |
1081 | for (count = 0; count < num; count++) | |
1082 | { | |
1083 | Elf_External_Phdr x_phdr; | |
1084 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1085 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1086 | } | |
1087 | ||
1088 | num = elf_numsections (abfd); | |
1089 | for (count = 0; count < num; count++) | |
1090 | { | |
1091 | Elf_Internal_Shdr i_shdr; | |
1092 | Elf_External_Shdr x_shdr; | |
1093 | ||
1094 | i_shdr = *i_shdrp[count]; | |
1095 | i_shdr.sh_offset = 0; | |
1096 | ||
1097 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1098 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1099 | ||
4d48ecf3 | 1100 | /* PR ld/12451: |
0d13c96b | 1101 | Process the section's contents, if it has some. Read them in if necessary. */ |
d94838b1 RM |
1102 | if (i_shdr.contents) |
1103 | (*process) (i_shdr.contents, i_shdr.sh_size, arg); | |
0d13c96b | 1104 | else if (i_shdr.sh_type != SHT_NOBITS) |
4d48ecf3 NC |
1105 | { |
1106 | asection *sec; | |
1107 | ||
1108 | sec = bfd_section_from_elf_index (abfd, count); | |
1109 | if (sec != NULL) | |
1110 | { | |
1111 | if (sec->contents == NULL) | |
1112 | { | |
1113 | /* Force rereading from file. */ | |
1114 | sec->flags &= ~SEC_IN_MEMORY; | |
1115 | if (! bfd_malloc_and_get_section (abfd, sec, & sec->contents)) | |
1116 | continue; | |
1117 | } | |
1118 | if (sec->contents != NULL) | |
1119 | (*process) (sec->contents, i_shdr.sh_size, arg); | |
1120 | } | |
1121 | } | |
d94838b1 RM |
1122 | } |
1123 | ||
1124 | return TRUE; | |
1125 | } | |
1126 | ||
252b5132 | 1127 | long |
268b6b39 | 1128 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1129 | { |
1130 | Elf_Internal_Shdr *hdr; | |
1131 | Elf_Internal_Shdr *verhdr; | |
1132 | unsigned long symcount; /* Number of external ELF symbols */ | |
1133 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1134 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1135 | Elf_Internal_Sym *isym; |
1136 | Elf_Internal_Sym *isymend; | |
1137 | Elf_Internal_Sym *isymbuf = NULL; | |
1138 | Elf_External_Versym *xver; | |
1139 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1140 | const struct elf_backend_data *ebd; |
dc810e39 | 1141 | bfd_size_type amt; |
252b5132 RH |
1142 | |
1143 | /* Read each raw ELF symbol, converting from external ELF form to | |
1144 | internal ELF form, and then using the information to create a | |
1145 | canonical bfd symbol table entry. | |
1146 | ||
1147 | Note that we allocate the initial bfd canonical symbol buffer | |
1148 | based on a one-to-one mapping of the ELF symbols to canonical | |
1149 | symbols. We actually use all the ELF symbols, so there will be no | |
1150 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1151 | build the caller's pointer vector. */ |
252b5132 RH |
1152 | |
1153 | if (! dynamic) | |
1154 | { | |
1155 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1156 | verhdr = NULL; | |
1157 | } | |
1158 | else | |
1159 | { | |
1160 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1161 | if (elf_dynversym (abfd) == 0) | |
1162 | verhdr = NULL; | |
1163 | else | |
1164 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1165 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1166 | && elf_tdata (abfd)->verdef == NULL) | |
1167 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1168 | && elf_tdata (abfd)->verref == NULL)) | |
1169 | { | |
fc0e6df6 | 1170 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1171 | return -1; |
1172 | } | |
1173 | } | |
1174 | ||
6cdc0ccc | 1175 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1176 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1177 | if (symcount == 0) |
1178 | sym = symbase = NULL; | |
1179 | else | |
1180 | { | |
6cdc0ccc AM |
1181 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1182 | NULL, NULL, NULL); | |
1183 | if (isymbuf == NULL) | |
1184 | return -1; | |
252b5132 | 1185 | |
dc810e39 AM |
1186 | amt = symcount; |
1187 | amt *= sizeof (elf_symbol_type); | |
a50b1753 | 1188 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt); |
252b5132 | 1189 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1190 | goto error_return; |
252b5132 RH |
1191 | |
1192 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1193 | if (verhdr != NULL |
1194 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1195 | { | |
1196 | (*_bfd_error_handler) | |
1197 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1198 | abfd->filename, | |
1199 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1200 | symcount); | |
1201 | ||
1202 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1203 | since that is more helpful than just quitting. */ |
252b5132 RH |
1204 | verhdr = NULL; |
1205 | } | |
1206 | ||
1207 | if (verhdr != NULL) | |
1208 | { | |
1209 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1210 | goto error_return; | |
1211 | ||
a50b1753 | 1212 | xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1213 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1214 | goto error_return; |
1215 | ||
268b6b39 | 1216 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1217 | goto error_return; |
1218 | } | |
1219 | ||
1220 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1221 | xver = xverbuf; |
1222 | if (xver != NULL) | |
1223 | ++xver; | |
1224 | isymend = isymbuf + symcount; | |
1225 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1226 | { |
6cdc0ccc | 1227 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1228 | sym->symbol.the_bfd = abfd; |
1229 | ||
26c61ae5 | 1230 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
252b5132 | 1231 | |
6cdc0ccc | 1232 | sym->symbol.value = isym->st_value; |
252b5132 | 1233 | |
6cdc0ccc | 1234 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1235 | { |
1236 | sym->symbol.section = bfd_und_section_ptr; | |
1237 | } | |
6cdc0ccc | 1238 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1239 | { |
1240 | sym->symbol.section = bfd_abs_section_ptr; | |
1241 | } | |
6cdc0ccc | 1242 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1243 | { |
1244 | sym->symbol.section = bfd_com_section_ptr; | |
02d00247 AM |
1245 | if ((abfd->flags & BFD_PLUGIN) != 0) |
1246 | { | |
1247 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
1248 | ||
1249 | if (xc == NULL) | |
1250 | { | |
1251 | flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
1252 | | SEC_EXCLUDE); | |
1253 | xc = bfd_make_section_with_flags (abfd, "COMMON", flags); | |
1254 | if (xc == NULL) | |
1255 | goto error_return; | |
1256 | } | |
1257 | sym->symbol.section = xc; | |
1258 | } | |
252b5132 RH |
1259 | /* Elf puts the alignment into the `value' field, and |
1260 | the size into the `size' field. BFD wants to see the | |
1261 | size in the value field, and doesn't care (at the | |
1262 | moment) about the alignment. */ | |
6cdc0ccc | 1263 | sym->symbol.value = isym->st_size; |
252b5132 | 1264 | } |
252b5132 | 1265 | else |
cb33740c AM |
1266 | { |
1267 | sym->symbol.section | |
1268 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1269 | if (sym->symbol.section == NULL) | |
1270 | { | |
1271 | /* This symbol is in a section for which we did not | |
1272 | create a BFD section. Just use bfd_abs_section, | |
1273 | although it is wrong. FIXME. */ | |
1274 | sym->symbol.section = bfd_abs_section_ptr; | |
1275 | } | |
1276 | } | |
252b5132 | 1277 | |
1049f94e | 1278 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1279 | already section relative. */ |
252b5132 RH |
1280 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1281 | sym->symbol.value -= sym->symbol.section->vma; | |
1282 | ||
6cdc0ccc | 1283 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1284 | { |
1285 | case STB_LOCAL: | |
1286 | sym->symbol.flags |= BSF_LOCAL; | |
1287 | break; | |
1288 | case STB_GLOBAL: | |
6cdc0ccc | 1289 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1290 | sym->symbol.flags |= BSF_GLOBAL; |
1291 | break; | |
1292 | case STB_WEAK: | |
1293 | sym->symbol.flags |= BSF_WEAK; | |
1294 | break; | |
3e7a7d11 NC |
1295 | case STB_GNU_UNIQUE: |
1296 | sym->symbol.flags |= BSF_GNU_UNIQUE; | |
1297 | break; | |
252b5132 RH |
1298 | } |
1299 | ||
6cdc0ccc | 1300 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1301 | { |
1302 | case STT_SECTION: | |
1303 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1304 | break; | |
1305 | case STT_FILE: | |
1306 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1307 | break; | |
1308 | case STT_FUNC: | |
1309 | sym->symbol.flags |= BSF_FUNCTION; | |
1310 | break; | |
504b7d20 NC |
1311 | case STT_COMMON: |
1312 | /* FIXME: Do we have to put the size field into the value field | |
1313 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
1314 | /* Fall through. */ | |
252b5132 RH |
1315 | case STT_OBJECT: |
1316 | sym->symbol.flags |= BSF_OBJECT; | |
1317 | break; | |
0be9069d L |
1318 | case STT_TLS: |
1319 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1320 | break; | |
d9352518 DB |
1321 | case STT_RELC: |
1322 | sym->symbol.flags |= BSF_RELC; | |
1323 | break; | |
1324 | case STT_SRELC: | |
1325 | sym->symbol.flags |= BSF_SRELC; | |
1326 | break; | |
d8045f23 NC |
1327 | case STT_GNU_IFUNC: |
1328 | sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION; | |
1329 | break; | |
252b5132 RH |
1330 | } |
1331 | ||
1332 | if (dynamic) | |
1333 | sym->symbol.flags |= BSF_DYNAMIC; | |
1334 | ||
6cdc0ccc | 1335 | if (xver != NULL) |
252b5132 RH |
1336 | { |
1337 | Elf_Internal_Versym iversym; | |
1338 | ||
6cdc0ccc | 1339 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1340 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1341 | xver++; |
252b5132 RH |
1342 | } |
1343 | ||
1344 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1345 | if (ebd->elf_backend_symbol_processing) |
1346 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1347 | } |
1348 | } | |
1349 | ||
1350 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1351 | if (ebd->elf_backend_symbol_table_processing) |
1352 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1353 | |
1354 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1355 | ||
1356 | symcount = sym - symbase; | |
1357 | ||
1358 | /* Fill in the user's symbol pointer vector if needed. */ | |
1359 | if (symptrs) | |
1360 | { | |
1361 | long l = symcount; | |
1362 | ||
1363 | sym = symbase; | |
1364 | while (l-- > 0) | |
1365 | { | |
1366 | *symptrs++ = &sym->symbol; | |
1367 | sym++; | |
1368 | } | |
1369 | *symptrs = 0; /* Final null pointer */ | |
1370 | } | |
1371 | ||
6cdc0ccc AM |
1372 | if (xverbuf != NULL) |
1373 | free (xverbuf); | |
1374 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1375 | free (isymbuf); | |
252b5132 | 1376 | return symcount; |
9ad5cbcf | 1377 | |
252b5132 | 1378 | error_return: |
6cdc0ccc AM |
1379 | if (xverbuf != NULL) |
1380 | free (xverbuf); | |
1381 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1382 | free (isymbuf); | |
252b5132 RH |
1383 | return -1; |
1384 | } | |
1385 | ||
5c799c07 | 1386 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1387 | them. */ |
252b5132 | 1388 | |
b34976b6 | 1389 | static bfd_boolean |
268b6b39 AM |
1390 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1391 | asection *asect, | |
1392 | Elf_Internal_Shdr *rel_hdr, | |
1393 | bfd_size_type reloc_count, | |
1394 | arelent *relents, | |
1395 | asymbol **symbols, | |
1396 | bfd_boolean dynamic) | |
252b5132 | 1397 | { |
9c5bfbb7 | 1398 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1399 | void *allocated = NULL; |
252b5132 | 1400 | bfd_byte *native_relocs; |
252b5132 RH |
1401 | arelent *relent; |
1402 | unsigned int i; | |
1403 | int entsize; | |
5ad8645c | 1404 | unsigned int symcount; |
252b5132 | 1405 | |
268b6b39 | 1406 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1407 | if (allocated == NULL) |
1408 | goto error_return; | |
1409 | ||
1410 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1411 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1412 | != rel_hdr->sh_size)) |
1413 | goto error_return; | |
1414 | ||
a50b1753 | 1415 | native_relocs = (bfd_byte *) allocated; |
252b5132 | 1416 | |
252b5132 RH |
1417 | entsize = rel_hdr->sh_entsize; |
1418 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1419 | || entsize == sizeof (Elf_External_Rela)); | |
1420 | ||
5ad8645c AM |
1421 | if (dynamic) |
1422 | symcount = bfd_get_dynamic_symcount (abfd); | |
1423 | else | |
1424 | symcount = bfd_get_symcount (abfd); | |
1425 | ||
252b5132 RH |
1426 | for (i = 0, relent = relents; |
1427 | i < reloc_count; | |
1428 | i++, relent++, native_relocs += entsize) | |
1429 | { | |
1430 | Elf_Internal_Rela rela; | |
252b5132 RH |
1431 | |
1432 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1433 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1434 | else |
947216bf | 1435 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1436 | |
1437 | /* The address of an ELF reloc is section relative for an object | |
1438 | file, and absolute for an executable file or shared library. | |
1439 | The address of a normal BFD reloc is always section relative, | |
1440 | and the address of a dynamic reloc is absolute.. */ | |
1441 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1442 | relent->address = rela.r_offset; | |
1443 | else | |
1444 | relent->address = rela.r_offset - asect->vma; | |
1445 | ||
cf35638d | 1446 | if (ELF_R_SYM (rela.r_info) == STN_UNDEF) |
252b5132 | 1447 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
05a487dc | 1448 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1449 | { |
1450 | (*_bfd_error_handler) | |
1451 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1452 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1453 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1454 | } | |
252b5132 RH |
1455 | else |
1456 | { | |
b48c61bc | 1457 | asymbol **ps; |
28c9d252 | 1458 | |
252b5132 | 1459 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1460 | |
f9cfae62 | 1461 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1462 | } |
1463 | ||
1464 | relent->addend = rela.r_addend; | |
1465 | ||
90fff0d4 DJ |
1466 | if ((entsize == sizeof (Elf_External_Rela) |
1467 | && ebd->elf_info_to_howto != NULL) | |
1468 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1469 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1470 | else | |
947216bf | 1471 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1472 | } |
1473 | ||
252b5132 RH |
1474 | if (allocated != NULL) |
1475 | free (allocated); | |
1476 | ||
b34976b6 | 1477 | return TRUE; |
252b5132 RH |
1478 | |
1479 | error_return: | |
1480 | if (allocated != NULL) | |
1481 | free (allocated); | |
b34976b6 | 1482 | return FALSE; |
252b5132 RH |
1483 | } |
1484 | ||
42fdc509 MM |
1485 | /* Read in and swap the external relocs. */ |
1486 | ||
b34976b6 | 1487 | bfd_boolean |
268b6b39 AM |
1488 | elf_slurp_reloc_table (bfd *abfd, |
1489 | asection *asect, | |
1490 | asymbol **symbols, | |
1491 | bfd_boolean dynamic) | |
42fdc509 MM |
1492 | { |
1493 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1494 | Elf_Internal_Shdr *rel_hdr; | |
1495 | Elf_Internal_Shdr *rel_hdr2; | |
1496 | bfd_size_type reloc_count; | |
1497 | bfd_size_type reloc_count2; | |
1498 | arelent *relents; | |
dc810e39 | 1499 | bfd_size_type amt; |
42fdc509 MM |
1500 | |
1501 | if (asect->relocation != NULL) | |
b34976b6 | 1502 | return TRUE; |
42fdc509 MM |
1503 | |
1504 | if (! dynamic) | |
1505 | { | |
1506 | if ((asect->flags & SEC_RELOC) == 0 | |
1507 | || asect->reloc_count == 0) | |
b34976b6 | 1508 | return TRUE; |
42fdc509 | 1509 | |
d4730f92 BS |
1510 | rel_hdr = d->rel.hdr; |
1511 | reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0; | |
1512 | rel_hdr2 = d->rela.hdr; | |
1513 | reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0; | |
42fdc509 MM |
1514 | |
1515 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
d4730f92 | 1516 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
42fdc509 MM |
1517 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
1518 | ||
1519 | } | |
1520 | else | |
1521 | { | |
57e21bef MM |
1522 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1523 | case because relocations against this section may use the | |
1524 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1525 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1526 | if (asect->size == 0) |
b34976b6 | 1527 | return TRUE; |
42fdc509 MM |
1528 | |
1529 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1530 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1531 | rel_hdr2 = NULL; |
57e21bef | 1532 | reloc_count2 = 0; |
42fdc509 MM |
1533 | } |
1534 | ||
dc810e39 | 1535 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
a50b1753 | 1536 | relents = (arelent *) bfd_alloc (abfd, amt); |
42fdc509 | 1537 | if (relents == NULL) |
b34976b6 | 1538 | return FALSE; |
42fdc509 | 1539 | |
d4730f92 BS |
1540 | if (rel_hdr |
1541 | && !elf_slurp_reloc_table_from_section (abfd, asect, | |
1542 | rel_hdr, reloc_count, | |
1543 | relents, | |
1544 | symbols, dynamic)) | |
b34976b6 | 1545 | return FALSE; |
60bcf0fa NC |
1546 | |
1547 | if (rel_hdr2 | |
42fdc509 MM |
1548 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1549 | rel_hdr2, reloc_count2, | |
1550 | relents + reloc_count, | |
1551 | symbols, dynamic)) | |
b34976b6 | 1552 | return FALSE; |
42fdc509 | 1553 | |
42fdc509 | 1554 | asect->relocation = relents; |
b34976b6 | 1555 | return TRUE; |
42fdc509 MM |
1556 | } |
1557 | ||
e460dd0d | 1558 | #if DEBUG & 2 |
252b5132 | 1559 | static void |
268b6b39 | 1560 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1561 | { |
1562 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1563 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1564 | (long) hdr); | |
1565 | fprintf (stderr, | |
1566 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1567 | (long) hdr->sh_name, | |
1568 | (long) hdr->sh_type, | |
1569 | (long) hdr->sh_flags); | |
1570 | fprintf (stderr, | |
1571 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1572 | (long) hdr->sh_addr, | |
1573 | (long) hdr->sh_offset, | |
1574 | (long) hdr->sh_size); | |
1575 | fprintf (stderr, | |
1576 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1577 | (long) hdr->sh_link, | |
1578 | (long) hdr->sh_info, | |
1579 | (long) hdr->sh_addralign); | |
1580 | fprintf (stderr, "sh_entsize = %ld\n", | |
1581 | (long) hdr->sh_entsize); | |
1582 | fflush (stderr); | |
1583 | } | |
e460dd0d | 1584 | #endif |
252b5132 | 1585 | |
e460dd0d | 1586 | #if DEBUG & 1 |
252b5132 | 1587 | static void |
268b6b39 | 1588 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1589 | { |
1590 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1591 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1592 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1593 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1594 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1595 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1596 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1597 | } | |
252b5132 RH |
1598 | #endif |
1599 | \f | |
8d6337fe RM |
1600 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1601 | reconstruct an ELF file by reading the segments out of remote memory | |
1602 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1603 | points to. If not null, *LOADBASEP is filled in with the difference | |
1604 | between the VMAs from which the segments were read, and the VMAs the | |
1605 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1606 | ||
1607 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1608 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1609 | should return zero on success or an `errno' code on failure. TEMPL must | |
1610 | be a BFD for a target with the word size and byte order found in the | |
1611 | remote memory. */ | |
1612 | ||
1613 | bfd * | |
268b6b39 AM |
1614 | NAME(_bfd_elf,bfd_from_remote_memory) |
1615 | (bfd *templ, | |
1616 | bfd_vma ehdr_vma, | |
1617 | bfd_vma *loadbasep, | |
f075ee0c | 1618 | int (*target_read_memory) (bfd_vma, bfd_byte *, int)) |
8d6337fe RM |
1619 | { |
1620 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1621 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1622 | Elf_External_Phdr *x_phdrs; | |
1623 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1624 | bfd *nbfd; | |
1625 | struct bfd_in_memory *bim; | |
1626 | int contents_size; | |
f075ee0c | 1627 | bfd_byte *contents; |
8d6337fe RM |
1628 | int err; |
1629 | unsigned int i; | |
1630 | bfd_vma loadbase; | |
3fec76aa | 1631 | bfd_boolean loadbase_set; |
8d6337fe RM |
1632 | |
1633 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1634 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1635 | if (err) |
1636 | { | |
1637 | bfd_set_error (bfd_error_system_call); | |
1638 | errno = err; | |
1639 | return NULL; | |
1640 | } | |
1641 | ||
1642 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1643 | make use of. The magic number must match, the address size ('class') | |
1644 | and byte-swapping must match our XVEC entry. */ | |
1645 | ||
1646 | if (! elf_file_p (&x_ehdr) | |
1647 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1648 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1649 | { | |
1650 | bfd_set_error (bfd_error_wrong_format); | |
1651 | return NULL; | |
1652 | } | |
1653 | ||
1654 | /* Check that file's byte order matches xvec's */ | |
1655 | switch (x_ehdr.e_ident[EI_DATA]) | |
1656 | { | |
1657 | case ELFDATA2MSB: /* Big-endian */ | |
1658 | if (! bfd_header_big_endian (templ)) | |
1659 | { | |
1660 | bfd_set_error (bfd_error_wrong_format); | |
1661 | return NULL; | |
1662 | } | |
1663 | break; | |
1664 | case ELFDATA2LSB: /* Little-endian */ | |
1665 | if (! bfd_header_little_endian (templ)) | |
1666 | { | |
1667 | bfd_set_error (bfd_error_wrong_format); | |
1668 | return NULL; | |
1669 | } | |
1670 | break; | |
1671 | case ELFDATANONE: /* No data encoding specified */ | |
1672 | default: /* Unknown data encoding specified */ | |
1673 | bfd_set_error (bfd_error_wrong_format); | |
1674 | return NULL; | |
1675 | } | |
1676 | ||
1677 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1678 | ||
1679 | /* The file header tells where to find the program headers. | |
1680 | These are what we use to actually choose what to read. */ | |
1681 | ||
1682 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1683 | { | |
1684 | bfd_set_error (bfd_error_wrong_format); | |
1685 | return NULL; | |
1686 | } | |
1687 | ||
a50b1753 NC |
1688 | x_phdrs = (Elf_External_Phdr *) |
1689 | bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); | |
8d6337fe RM |
1690 | if (x_phdrs == NULL) |
1691 | { | |
1692 | bfd_set_error (bfd_error_no_memory); | |
1693 | return NULL; | |
1694 | } | |
f075ee0c | 1695 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1696 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1697 | if (err) | |
1698 | { | |
1699 | free (x_phdrs); | |
1700 | bfd_set_error (bfd_error_system_call); | |
1701 | errno = err; | |
1702 | return NULL; | |
1703 | } | |
1704 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1705 | ||
1706 | contents_size = 0; | |
1707 | last_phdr = NULL; | |
1708 | loadbase = ehdr_vma; | |
3fec76aa | 1709 | loadbase_set = FALSE; |
8d6337fe RM |
1710 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1711 | { | |
1712 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1713 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1714 | { |
1715 | bfd_vma segment_end; | |
1716 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1717 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1718 | if (segment_end > (bfd_vma) contents_size) | |
1719 | contents_size = segment_end; | |
1720 | ||
3fec76aa JK |
1721 | /* LOADADDR is the `Base address' from the gELF specification: |
1722 | `lowest p_vaddr value for a PT_LOAD segment' is P_VADDR from the | |
1723 | first PT_LOAD as PT_LOADs are ordered by P_VADDR. */ | |
1724 | if (!loadbase_set && (i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1725 | { | |
1726 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1727 | loadbase_set = TRUE; | |
1728 | } | |
8d6337fe RM |
1729 | |
1730 | last_phdr = &i_phdrs[i]; | |
1731 | } | |
1732 | } | |
1733 | if (last_phdr == NULL) | |
1734 | { | |
1735 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1736 | free (x_phdrs); | |
1737 | bfd_set_error (bfd_error_wrong_format); | |
1738 | return NULL; | |
1739 | } | |
1740 | ||
1741 | /* Trim the last segment so we don't bother with zeros in the last page | |
1742 | that are off the end of the file. However, if the extra bit in that | |
1743 | page includes the section headers, keep them. */ | |
1744 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1745 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1746 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1747 | { | |
1748 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1749 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1750 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1751 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1752 | } | |
1753 | else | |
1754 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1755 | ||
1756 | /* Now we know the size of the whole image we want read in. */ | |
a50b1753 | 1757 | contents = (bfd_byte *) bfd_zmalloc (contents_size); |
8d6337fe RM |
1758 | if (contents == NULL) |
1759 | { | |
1760 | free (x_phdrs); | |
1761 | bfd_set_error (bfd_error_no_memory); | |
1762 | return NULL; | |
1763 | } | |
1764 | ||
1765 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1766 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe RM |
1767 | { |
1768 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1769 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1770 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1771 | if (end > (bfd_vma) contents_size) | |
1772 | end = contents_size; | |
1773 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1774 | & -i_phdrs[i].p_align, | |
1775 | contents + start, end - start); | |
1776 | if (err) | |
1777 | { | |
1778 | free (x_phdrs); | |
1779 | free (contents); | |
1780 | bfd_set_error (bfd_error_system_call); | |
1781 | errno = err; | |
1782 | return NULL; | |
1783 | } | |
1784 | } | |
1785 | free (x_phdrs); | |
1786 | ||
1787 | /* If the segments visible in memory didn't include the section headers, | |
1788 | then clear them from the file header. */ | |
1789 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1790 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1791 | { | |
1792 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1793 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1794 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1795 | } | |
1796 | ||
1797 | /* This will normally have been in the first PT_LOAD segment. But it | |
1798 | conceivably could be missing, and we might have just changed it. */ | |
1799 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1800 | ||
1801 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
a50b1753 | 1802 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1803 | if (bim == NULL) |
1804 | { | |
1805 | free (contents); | |
1806 | bfd_set_error (bfd_error_no_memory); | |
1807 | return NULL; | |
1808 | } | |
1809 | nbfd = _bfd_new_bfd (); | |
1810 | if (nbfd == NULL) | |
1811 | { | |
1812 | free (bim); | |
1813 | free (contents); | |
1814 | bfd_set_error (bfd_error_no_memory); | |
1815 | return NULL; | |
1816 | } | |
1817 | nbfd->filename = "<in-memory>"; | |
1818 | nbfd->xvec = templ->xvec; | |
1819 | bim->size = contents_size; | |
1820 | bim->buffer = contents; | |
268b6b39 | 1821 | nbfd->iostream = bim; |
8d6337fe | 1822 | nbfd->flags = BFD_IN_MEMORY; |
65077aa8 TG |
1823 | nbfd->iovec = &_bfd_memory_iovec; |
1824 | nbfd->origin = 0; | |
8d6337fe RM |
1825 | nbfd->direction = read_direction; |
1826 | nbfd->mtime = time (NULL); | |
1827 | nbfd->mtime_set = TRUE; | |
1828 | ||
1829 | if (loadbasep) | |
1830 | *loadbasep = loadbase; | |
1831 | return nbfd; | |
1832 | } | |
a836572f L |
1833 | |
1834 | /* Function for ELF_R_INFO. */ | |
1835 | ||
1836 | bfd_vma | |
1837 | NAME(elf,r_info) (bfd_vma sym, bfd_vma type) | |
1838 | { | |
1839 | return ELF_R_INFO (sym, type); | |
1840 | } | |
1841 | ||
1842 | /* Function for ELF_R_SYM. */ | |
1843 | ||
1844 | bfd_vma | |
1845 | NAME(elf,r_sym) (bfd_vma r_info) | |
1846 | { | |
1847 | return ELF_R_SYM (r_info); | |
1848 | } | |
8d6337fe | 1849 | \f |
252b5132 | 1850 | #include "elfcore.h" |
252b5132 RH |
1851 | \f |
1852 | /* Size-dependent data and functions. */ | |
1853 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1854 | sizeof (Elf_External_Ehdr), | |
1855 | sizeof (Elf_External_Phdr), | |
1856 | sizeof (Elf_External_Shdr), | |
1857 | sizeof (Elf_External_Rel), | |
1858 | sizeof (Elf_External_Rela), | |
1859 | sizeof (Elf_External_Sym), | |
1860 | sizeof (Elf_External_Dyn), | |
1861 | sizeof (Elf_External_Note), | |
70bcb145 | 1862 | 4, |
c7ac6ff8 | 1863 | 1, |
45d6a902 | 1864 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1865 | ELFCLASS, EV_CURRENT, |
1866 | elf_write_out_phdrs, | |
1867 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1868 | elf_checksum_contents, |
b9f66672 | 1869 | elf_write_relocs, |
73ff0d56 | 1870 | elf_swap_symbol_in, |
252b5132 RH |
1871 | elf_swap_symbol_out, |
1872 | elf_slurp_reloc_table, | |
1873 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1874 | elf_swap_dyn_in, |
1875 | elf_swap_dyn_out, | |
947216bf AM |
1876 | elf_swap_reloc_in, |
1877 | elf_swap_reloc_out, | |
1878 | elf_swap_reloca_in, | |
1879 | elf_swap_reloca_out | |
252b5132 | 1880 | }; |