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252b5132 | 1 | /* ELF executable support for BFD. |
82704155 | 2 | Copyright (C) 1991-2019 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
cd123cb7 | 16 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 17 | |
cd123cb7 NC |
18 | This program is free software; you can redistribute it and/or modify |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 3 of the License, or | |
21 | (at your option) any later version. | |
252b5132 | 22 | |
cd123cb7 NC |
23 | This program is distributed in the hope that it will be useful, |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
31 | MA 02110-1301, USA. */ | |
252b5132 | 32 | |
252b5132 RH |
33 | |
34 | /* Problems and other issues to resolve. | |
35 | ||
36 | (1) BFD expects there to be some fixed number of "sections" in | |
0560d0f7 | 37 | the object file. I.E. there is a "section_count" variable in the |
252b5132 RH |
38 | bfd structure which contains the number of sections. However, ELF |
39 | supports multiple "views" of a file. In particular, with current | |
40 | implementations, executable files typically have two tables, a | |
41 | program header table and a section header table, both of which | |
42 | partition the executable. | |
43 | ||
44 | In ELF-speak, the "linking view" of the file uses the section header | |
45 | table to access "sections" within the file, and the "execution view" | |
46 | uses the program header table to access "segments" within the file. | |
47 | "Segments" typically may contain all the data from one or more | |
48 | "sections". | |
49 | ||
50 | Note that the section header table is optional in ELF executables, | |
51 | but it is this information that is most useful to gdb. If the | |
52 | section header table is missing, then gdb should probably try | |
53 | to make do with the program header table. (FIXME) | |
54 | ||
55 | (2) The code in this file is compiled twice, once in 32-bit mode and | |
56 | once in 64-bit mode. More of it should be made size-independent | |
57 | and moved into elf.c. | |
58 | ||
59 | (3) ELF section symbols are handled rather sloppily now. This should | |
60 | be cleaned up, and ELF section symbols reconciled with BFD section | |
61 | symbols. | |
62 | ||
63 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
64 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
65 | it's cast in stone. | |
66 | */ | |
67 | ||
252b5132 | 68 | #include "sysdep.h" |
3db64b00 | 69 | #include "bfd.h" |
210ba1e8 | 70 | #include "libiberty.h" |
252b5132 RH |
71 | #include "bfdlink.h" |
72 | #include "libbfd.h" | |
73 | #include "elf-bfd.h" | |
1be5090b | 74 | #include "libiberty.h" |
252b5132 RH |
75 | |
76 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ | |
77 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) | |
78 | #define Elf_External_Sym NAME(Elf,External_Sym) | |
79 | #define Elf_External_Shdr NAME(Elf,External_Shdr) | |
80 | #define Elf_External_Phdr NAME(Elf,External_Phdr) | |
81 | #define Elf_External_Rel NAME(Elf,External_Rel) | |
82 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
83 | #define Elf_External_Dyn NAME(Elf,External_Dyn) | |
84 | ||
85 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) | |
86 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
87 | #define elf_core_file_matches_executable_p \ | |
88 | NAME(bfd_elf,core_file_matches_executable_p) | |
261b8d08 | 89 | #define elf_core_file_pid NAME(bfd_elf,core_file_pid) |
252b5132 RH |
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); | |
35fc36a8 | 200 | dst->st_target_internal = 0; |
8384fb8f | 201 | return TRUE; |
252b5132 RH |
202 | } |
203 | ||
204 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 205 | format. */ |
252b5132 RH |
206 | |
207 | void | |
268b6b39 AM |
208 | elf_swap_symbol_out (bfd *abfd, |
209 | const Elf_Internal_Sym *src, | |
210 | void *cdst, | |
211 | void *shndx) | |
252b5132 | 212 | { |
9ad5cbcf | 213 | unsigned int tmp; |
a50b1753 | 214 | Elf_External_Sym *dst = (Elf_External_Sym *) cdst; |
dc810e39 AM |
215 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
216 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
217 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
218 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
219 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf | 220 | tmp = src->st_shndx; |
4fbb74a6 | 221 | if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE) |
9ad5cbcf AM |
222 | { |
223 | if (shndx == NULL) | |
224 | abort (); | |
225 | H_PUT_32 (abfd, tmp, shndx); | |
4fbb74a6 | 226 | tmp = SHN_XINDEX & 0xffff; |
9ad5cbcf AM |
227 | } |
228 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
229 | } |
230 | ||
252b5132 | 231 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 232 | internal format. */ |
252b5132 RH |
233 | |
234 | static void | |
268b6b39 AM |
235 | elf_swap_ehdr_in (bfd *abfd, |
236 | const Elf_External_Ehdr *src, | |
237 | Elf_Internal_Ehdr *dst) | |
252b5132 | 238 | { |
448cafa4 | 239 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 240 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
241 | dst->e_type = H_GET_16 (abfd, src->e_type); |
242 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
243 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 244 | if (signed_vma) |
dc810e39 | 245 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 246 | else |
dc810e39 AM |
247 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
248 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
249 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
250 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
251 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
252 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
253 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
254 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
255 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
256 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
257 | } |
258 | ||
259 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 260 | external format. */ |
252b5132 RH |
261 | |
262 | static void | |
268b6b39 AM |
263 | elf_swap_ehdr_out (bfd *abfd, |
264 | const Elf_Internal_Ehdr *src, | |
265 | Elf_External_Ehdr *dst) | |
252b5132 | 266 | { |
5732c114 | 267 | unsigned int tmp; |
448cafa4 | 268 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 269 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 270 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
271 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
272 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
273 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 274 | if (signed_vma) |
dc810e39 | 275 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 276 | else |
dc810e39 AM |
277 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
278 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
279 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
280 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
281 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
282 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
ecd12bc1 AM |
283 | tmp = src->e_phnum; |
284 | if (tmp > PN_XNUM) | |
285 | tmp = PN_XNUM; | |
286 | H_PUT_16 (abfd, tmp, dst->e_phnum); | |
dc810e39 | 287 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); |
5732c114 | 288 | tmp = src->e_shnum; |
4fbb74a6 | 289 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
290 | tmp = SHN_UNDEF; |
291 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
292 | tmp = src->e_shstrndx; | |
4fbb74a6 AM |
293 | if (tmp >= (SHN_LORESERVE & 0xffff)) |
294 | tmp = SHN_XINDEX & 0xffff; | |
5732c114 | 295 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); |
252b5132 RH |
296 | } |
297 | ||
252b5132 | 298 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 299 | ELF section header table entry in internal format. */ |
252b5132 RH |
300 | |
301 | static void | |
268b6b39 AM |
302 | elf_swap_shdr_in (bfd *abfd, |
303 | const Elf_External_Shdr *src, | |
304 | Elf_Internal_Shdr *dst) | |
252b5132 | 305 | { |
86dc0f79 RH |
306 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
307 | ||
dc810e39 AM |
308 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
309 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
310 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 311 | if (signed_vma) |
dc810e39 | 312 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 313 | else |
dc810e39 AM |
314 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
315 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
316 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
8ff71a9c NC |
317 | /* PR 23657. Check for invalid section size, in sections with contents. |
318 | Note - we do not set an error value here because the contents | |
319 | of this particular section might not be needed by the consumer. */ | |
320 | if (dst->sh_type != SHT_NOBITS | |
321 | && dst->sh_size > bfd_get_file_size (abfd)) | |
322 | _bfd_error_handler | |
323 | (_("warning: %pB has a corrupt section with a size (%" BFD_VMA_FMT "x) larger than the file size"), | |
324 | abfd, dst->sh_size); | |
dc810e39 AM |
325 | dst->sh_link = H_GET_32 (abfd, src->sh_link); |
326 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
327 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
328 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
329 | dst->bfd_section = NULL; |
330 | dst->contents = NULL; | |
331 | } | |
332 | ||
333 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 334 | ELF section header table entry in external format. */ |
252b5132 RH |
335 | |
336 | static void | |
268b6b39 AM |
337 | elf_swap_shdr_out (bfd *abfd, |
338 | const Elf_Internal_Shdr *src, | |
339 | Elf_External_Shdr *dst) | |
252b5132 | 340 | { |
3e932841 | 341 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
342 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
343 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
344 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
345 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
346 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
347 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
348 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
349 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
350 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
351 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
352 | } |
353 | ||
252b5132 | 354 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 355 | ELF program header table entry in internal format. */ |
252b5132 RH |
356 | |
357 | void | |
268b6b39 AM |
358 | elf_swap_phdr_in (bfd *abfd, |
359 | const Elf_External_Phdr *src, | |
360 | Elf_Internal_Phdr *dst) | |
252b5132 | 361 | { |
86dc0f79 RH |
362 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
363 | ||
dc810e39 AM |
364 | dst->p_type = H_GET_32 (abfd, src->p_type); |
365 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
366 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
367 | if (signed_vma) |
368 | { | |
dc810e39 AM |
369 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
370 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
371 | } |
372 | else | |
373 | { | |
dc810e39 AM |
374 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
375 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 376 | } |
dc810e39 AM |
377 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
378 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
379 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
380 | } |
381 | ||
382 | void | |
268b6b39 AM |
383 | elf_swap_phdr_out (bfd *abfd, |
384 | const Elf_Internal_Phdr *src, | |
385 | Elf_External_Phdr *dst) | |
252b5132 | 386 | { |
147d51c2 L |
387 | const struct elf_backend_data *bed; |
388 | bfd_vma p_paddr; | |
389 | ||
390 | bed = get_elf_backend_data (abfd); | |
391 | p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr; | |
392 | ||
3e932841 | 393 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
394 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
395 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
396 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
147d51c2 | 397 | H_PUT_WORD (abfd, p_paddr, dst->p_paddr); |
dc810e39 AM |
398 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); |
399 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
400 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
401 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
402 | } |
403 | ||
3e932841 | 404 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 405 | void |
268b6b39 AM |
406 | elf_swap_reloc_in (bfd *abfd, |
407 | const bfd_byte *s, | |
408 | Elf_Internal_Rela *dst) | |
252b5132 | 409 | { |
947216bf | 410 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
411 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
412 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 413 | dst->r_addend = 0; |
252b5132 RH |
414 | } |
415 | ||
947216bf | 416 | void |
268b6b39 AM |
417 | elf_swap_reloca_in (bfd *abfd, |
418 | const bfd_byte *s, | |
419 | Elf_Internal_Rela *dst) | |
252b5132 | 420 | { |
947216bf | 421 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
422 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
423 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
424 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
425 | } |
426 | ||
3e932841 | 427 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 428 | void |
268b6b39 AM |
429 | elf_swap_reloc_out (bfd *abfd, |
430 | const Elf_Internal_Rela *src, | |
431 | bfd_byte *d) | |
252b5132 | 432 | { |
947216bf | 433 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
434 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
435 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
436 | } |
437 | ||
947216bf | 438 | void |
268b6b39 AM |
439 | elf_swap_reloca_out (bfd *abfd, |
440 | const Elf_Internal_Rela *src, | |
441 | bfd_byte *d) | |
252b5132 | 442 | { |
947216bf | 443 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
444 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
445 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
446 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
447 | } |
448 | ||
268b6b39 AM |
449 | void |
450 | elf_swap_dyn_in (bfd *abfd, | |
451 | const void *p, | |
452 | Elf_Internal_Dyn *dst) | |
252b5132 | 453 | { |
a50b1753 | 454 | const Elf_External_Dyn *src = (const Elf_External_Dyn *) p; |
252b5132 | 455 | |
dc810e39 AM |
456 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
457 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
458 | } |
459 | ||
268b6b39 AM |
460 | void |
461 | elf_swap_dyn_out (bfd *abfd, | |
462 | const Elf_Internal_Dyn *src, | |
463 | void *p) | |
252b5132 | 464 | { |
a50b1753 | 465 | Elf_External_Dyn *dst = (Elf_External_Dyn *) p; |
c7ac6ff8 | 466 | |
dc810e39 AM |
467 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
468 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
469 | } |
470 | \f | |
471 | /* ELF .o/exec file reading */ | |
472 | ||
252b5132 RH |
473 | /* Begin processing a given object. |
474 | ||
475 | First we validate the file by reading in the ELF header and checking | |
476 | the magic number. */ | |
477 | ||
268b6b39 AM |
478 | static inline bfd_boolean |
479 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
480 | { |
481 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
482 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
483 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
484 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
485 | } | |
486 | ||
487 | /* Check to see if the file associated with ABFD matches the target vector | |
488 | that ABFD points to. | |
489 | ||
490 | Note that we may be called several times with the same ABFD, but different | |
491 | target vectors, most of which will not match. We have to avoid leaving | |
492 | any side effects in ABFD, or any data it points to (like tdata), if the | |
493 | file does not match the target vector. */ | |
494 | ||
495 | const bfd_target * | |
268b6b39 | 496 | elf_object_p (bfd *abfd) |
252b5132 RH |
497 | { |
498 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
499 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
500 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 501 | Elf_Internal_Shdr i_shdr; |
ed591155 | 502 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 503 | unsigned int shindex; |
9c5bfbb7 | 504 | const struct elf_backend_data *ebd; |
252b5132 | 505 | asection *s; |
dc810e39 | 506 | bfd_size_type amt; |
d1036acb | 507 | const bfd_target *target; |
252b5132 RH |
508 | |
509 | /* Read in the ELF header in external format. */ | |
510 | ||
268b6b39 | 511 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
512 | { |
513 | if (bfd_get_error () != bfd_error_system_call) | |
514 | goto got_wrong_format_error; | |
515 | else | |
516 | goto got_no_match; | |
517 | } | |
518 | ||
519 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
520 | make use of. The magic number must match, the address size ('class') | |
521 | and byte-swapping must match our XVEC entry, and it must have a | |
522 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 523 | file). */ |
252b5132 | 524 | |
82e51918 AM |
525 | if (! elf_file_p (&x_ehdr) |
526 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
527 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
528 | goto got_wrong_format_error; |
529 | ||
530 | /* Check that file's byte order matches xvec's */ | |
531 | switch (x_ehdr.e_ident[EI_DATA]) | |
532 | { | |
533 | case ELFDATA2MSB: /* Big-endian */ | |
534 | if (! bfd_header_big_endian (abfd)) | |
535 | goto got_wrong_format_error; | |
536 | break; | |
537 | case ELFDATA2LSB: /* Little-endian */ | |
538 | if (! bfd_header_little_endian (abfd)) | |
539 | goto got_wrong_format_error; | |
540 | break; | |
541 | case ELFDATANONE: /* No data encoding specified */ | |
542 | default: /* Unknown data encoding specified */ | |
543 | goto got_wrong_format_error; | |
544 | } | |
545 | ||
d1036acb L |
546 | target = abfd->xvec; |
547 | ||
252b5132 RH |
548 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
549 | the tdata pointer in the bfd. */ | |
550 | ||
d1036acb | 551 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 552 | goto got_no_match; |
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 | { | |
b32a5c16 | 616 | file_ptr where = (file_ptr) i_ehdrp->e_shoff; |
0560d0f7 | 617 | |
7ece0d85 | 618 | /* Seek to the section header table in the file. */ |
b32a5c16 | 619 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
7ece0d85 | 620 | goto got_no_match; |
5732c114 | 621 | |
7ece0d85 JJ |
622 | /* Read the first section header at index 0, and convert to internal |
623 | form. */ | |
268b6b39 | 624 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
625 | goto got_no_match; |
626 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 627 | |
7ece0d85 JJ |
628 | /* If the section count is zero, the actual count is in the first |
629 | section header. */ | |
630 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
631 | { |
632 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
1c52a645 L |
633 | if (i_ehdrp->e_shnum >= SHN_LORESERVE |
634 | || i_ehdrp->e_shnum != i_shdr.sh_size | |
635 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
636 | goto got_wrong_format_error; |
637 | } | |
5732c114 | 638 | |
7ece0d85 | 639 | /* And similarly for the string table index. */ |
4fbb74a6 | 640 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
641 | { |
642 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
643 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
644 | goto got_wrong_format_error; | |
645 | } | |
646 | ||
ecd12bc1 AM |
647 | /* And program headers. */ |
648 | if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0) | |
649 | { | |
650 | i_ehdrp->e_phnum = i_shdr.sh_info; | |
651 | if (i_ehdrp->e_phnum != i_shdr.sh_info) | |
652 | goto got_wrong_format_error; | |
653 | } | |
654 | ||
0560d0f7 AM |
655 | /* Sanity check that we can read all of the section headers. |
656 | It ought to be good enough to just read the last one. */ | |
657 | if (i_ehdrp->e_shnum != 1) | |
658 | { | |
659 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
660 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
661 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
662 | goto got_wrong_format_error; |
663 | ||
664 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
0560d0f7 AM |
665 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) |
666 | goto got_wrong_format_error; | |
667 | ||
b32a5c16 | 668 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
669 | goto got_no_match; |
670 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
671 | goto got_no_match; | |
672 | ||
673 | /* Back to where we were. */ | |
674 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
b32a5c16 | 675 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
676 | goto got_no_match; |
677 | } | |
7ece0d85 | 678 | } |
5732c114 | 679 | |
252b5132 | 680 | /* Allocate space for a copy of the section header table in |
5732c114 | 681 | internal form. */ |
0c35f01a AM |
682 | if (i_ehdrp->e_shnum != 0) |
683 | { | |
5732c114 | 684 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 685 | unsigned int num_sec; |
5732c114 | 686 | |
c20f6f63 AM |
687 | #ifndef BFD64 |
688 | if (i_ehdrp->e_shnum > ((bfd_size_type) -1) / sizeof (*i_shdrp)) | |
689 | goto got_wrong_format_error; | |
690 | #endif | |
38e64b0e | 691 | amt = sizeof (*i_shdrp) * (bfd_size_type) 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 | 721 | case EM_386: |
22abe556 | 722 | case EM_IAMCU: |
caa83f8b | 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; | |
dae82561 | 767 | _bfd_error_handler |
871b3ab2 | 768 | (_("warning: %pB has a corrupt string table index - ignoring"), |
dae82561 | 769 | abfd); |
0b49d371 | 770 | } |
24639c7d | 771 | } |
0b49d371 | 772 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
773 | goto got_wrong_format_error; |
774 | ||
252b5132 RH |
775 | /* Read in the program headers. */ |
776 | if (i_ehdrp->e_phnum == 0) | |
777 | elf_tdata (abfd)->phdr = NULL; | |
778 | else | |
779 | { | |
780 | Elf_Internal_Phdr *i_phdr; | |
781 | unsigned int i; | |
782 | ||
c20f6f63 AM |
783 | #ifndef BFD64 |
784 | if (i_ehdrp->e_phnum > ((bfd_size_type) -1) / sizeof (*i_phdr)) | |
785 | goto got_wrong_format_error; | |
786 | #endif | |
5f60af5d NC |
787 | /* Check for a corrupt input file with an impossibly large number |
788 | of program headers. */ | |
789 | if (bfd_get_file_size (abfd) > 0 | |
790 | && i_ehdrp->e_phnum > bfd_get_file_size (abfd)) | |
791 | goto got_no_match; | |
38e64b0e | 792 | amt = (bfd_size_type) i_ehdrp->e_phnum * sizeof (*i_phdr); |
a50b1753 | 793 | elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt); |
252b5132 RH |
794 | if (elf_tdata (abfd)->phdr == NULL) |
795 | goto got_no_match; | |
dc810e39 | 796 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
797 | goto got_no_match; |
798 | i_phdr = elf_tdata (abfd)->phdr; | |
799 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
800 | { | |
801 | Elf_External_Phdr x_phdr; | |
802 | ||
268b6b39 | 803 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
804 | goto got_no_match; |
805 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
806 | } | |
807 | } | |
808 | ||
1b3a8575 | 809 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 810 | { |
9ad5cbcf AM |
811 | unsigned int num_sec; |
812 | ||
0c35f01a AM |
813 | /* Once all of the section headers have been read and converted, we |
814 | can start processing them. Note that the first section header is | |
815 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
816 | num_sec = elf_numsections (abfd); |
817 | for (shindex = 1; shindex < num_sec; shindex++) | |
4fbb74a6 AM |
818 | if (!bfd_section_from_shdr (abfd, shindex)) |
819 | goto got_no_match; | |
3d7f7666 | 820 | |
dd863624 L |
821 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
822 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 823 | goto got_wrong_format_error; |
252b5132 RH |
824 | } |
825 | ||
826 | /* Let the backend double check the format and override global | |
827 | information. */ | |
828 | if (ebd->elf_backend_object_p) | |
829 | { | |
82e51918 | 830 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
831 | goto got_wrong_format_error; |
832 | } | |
833 | ||
a14199db AM |
834 | /* Remember the entry point specified in the ELF file header. */ |
835 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
836 | ||
252b5132 RH |
837 | /* If we have created any reloc sections that are associated with |
838 | debugging sections, mark the reloc sections as debugging as well. */ | |
839 | for (s = abfd->sections; s != NULL; s = s->next) | |
840 | { | |
841 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
842 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
843 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
844 | { | |
845 | unsigned long targ_index; | |
846 | asection *targ_sec; | |
847 | ||
848 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
849 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
850 | if (targ_sec != NULL | |
851 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
852 | s->flags |= SEC_DEBUGGING; | |
853 | } | |
854 | } | |
d1036acb | 855 | return target; |
252b5132 RH |
856 | |
857 | got_wrong_format_error: | |
858 | bfd_set_error (bfd_error_wrong_format); | |
ed591155 | 859 | |
252b5132 | 860 | got_no_match: |
ed591155 | 861 | return NULL; |
252b5132 RH |
862 | } |
863 | \f | |
864 | /* ELF .o/exec file writing */ | |
865 | ||
866 | /* Write out the relocs. */ | |
867 | ||
b9f66672 | 868 | void |
268b6b39 | 869 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 870 | { |
a50b1753 | 871 | bfd_boolean *failedp = (bfd_boolean *) data; |
252b5132 | 872 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 873 | bfd_vma addr_offset; |
c39a58e6 | 874 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
875 | size_t extsize; |
876 | bfd_byte *dst_rela; | |
252b5132 | 877 | unsigned int idx; |
947216bf AM |
878 | asymbol *last_sym; |
879 | int last_sym_idx; | |
252b5132 RH |
880 | |
881 | /* If we have already failed, don't do anything. */ | |
882 | if (*failedp) | |
883 | return; | |
884 | ||
885 | if ((sec->flags & SEC_RELOC) == 0) | |
886 | return; | |
887 | ||
888 | /* The linker backend writes the relocs out itself, and sets the | |
889 | reloc_count field to zero to inhibit writing them here. Also, | |
890 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
891 | relocs. */ | |
892 | if (sec->reloc_count == 0) | |
893 | return; | |
894 | ||
9a44bbd9 DJ |
895 | /* If we have opened an existing file for update, reloc_count may be |
896 | set even though we are not linking. In that case we have nothing | |
897 | to do. */ | |
898 | if (sec->orelocation == NULL) | |
899 | return; | |
900 | ||
d4730f92 BS |
901 | rela_hdr = elf_section_data (sec)->rela.hdr; |
902 | if (rela_hdr == NULL) | |
903 | rela_hdr = elf_section_data (sec)->rel.hdr; | |
252b5132 RH |
904 | |
905 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
a50b1753 | 906 | rela_hdr->contents = (unsigned char *) bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
907 | if (rela_hdr->contents == NULL) |
908 | { | |
b34976b6 | 909 | *failedp = TRUE; |
252b5132 RH |
910 | return; |
911 | } | |
912 | ||
bf572ba0 MM |
913 | /* Figure out whether the relocations are RELA or REL relocations. */ |
914 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
915 | { |
916 | swap_out = elf_swap_reloca_out; | |
917 | extsize = sizeof (Elf_External_Rela); | |
918 | } | |
bf572ba0 | 919 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
920 | { |
921 | swap_out = elf_swap_reloc_out; | |
922 | extsize = sizeof (Elf_External_Rel); | |
923 | } | |
bf572ba0 MM |
924 | else |
925 | /* Every relocation section should be either an SHT_RELA or an | |
926 | SHT_REL section. */ | |
927 | abort (); | |
928 | ||
947216bf AM |
929 | /* The address of an ELF reloc is section relative for an object |
930 | file, and absolute for an executable file or shared library. | |
931 | The address of a BFD reloc is always section relative. */ | |
932 | addr_offset = 0; | |
933 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
934 | addr_offset = sec->vma; | |
935 | ||
3e932841 | 936 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
937 | last_sym = 0; |
938 | last_sym_idx = 0; | |
939 | dst_rela = rela_hdr->contents; | |
252b5132 | 940 | |
947216bf AM |
941 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
942 | { | |
943 | Elf_Internal_Rela src_rela; | |
944 | arelent *ptr; | |
945 | asymbol *sym; | |
946 | int n; | |
947 | ||
948 | ptr = sec->orelocation[idx]; | |
949 | sym = *ptr->sym_ptr_ptr; | |
950 | if (sym == last_sym) | |
951 | n = last_sym_idx; | |
952 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
953 | n = STN_UNDEF; | |
954 | else | |
252b5132 | 955 | { |
947216bf AM |
956 | last_sym = sym; |
957 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
958 | if (n < 0) | |
252b5132 | 959 | { |
b34976b6 | 960 | *failedp = TRUE; |
252b5132 RH |
961 | return; |
962 | } | |
947216bf | 963 | last_sym_idx = n; |
252b5132 | 964 | } |
252b5132 | 965 | |
947216bf AM |
966 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
967 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
968 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 969 | { |
b34976b6 | 970 | *failedp = TRUE; |
947216bf | 971 | return; |
252b5132 | 972 | } |
947216bf | 973 | |
2d054e6b NC |
974 | if (ptr->howto == NULL) |
975 | { | |
976 | *failedp = TRUE; | |
977 | return; | |
978 | } | |
979 | ||
947216bf AM |
980 | src_rela.r_offset = ptr->address + addr_offset; |
981 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
982 | src_rela.r_addend = ptr->addend; | |
983 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
984 | } |
985 | } | |
986 | ||
987 | /* Write out the program headers. */ | |
988 | ||
989 | int | |
268b6b39 AM |
990 | elf_write_out_phdrs (bfd *abfd, |
991 | const Elf_Internal_Phdr *phdr, | |
992 | unsigned int count) | |
252b5132 RH |
993 | { |
994 | while (count--) | |
995 | { | |
996 | Elf_External_Phdr extphdr; | |
1a9ccd70 | 997 | |
252b5132 | 998 | elf_swap_phdr_out (abfd, phdr, &extphdr); |
268b6b39 AM |
999 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1000 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1001 | return -1; |
1002 | phdr++; | |
1003 | } | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | /* Write out the section headers and the ELF file header. */ | |
1008 | ||
b34976b6 | 1009 | bfd_boolean |
268b6b39 | 1010 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1011 | { |
1012 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1013 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1014 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1015 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1016 | unsigned int count; | |
dc810e39 | 1017 | bfd_size_type amt; |
252b5132 RH |
1018 | |
1019 | i_ehdrp = elf_elfheader (abfd); | |
1020 | i_shdrp = elf_elfsections (abfd); | |
1021 | ||
3e932841 | 1022 | /* swap the header before spitting it out... */ |
252b5132 RH |
1023 | |
1024 | #if DEBUG & 1 | |
1025 | elf_debug_file (i_ehdrp); | |
1026 | #endif | |
1027 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1028 | amt = sizeof (x_ehdr); |
252b5132 | 1029 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1030 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1031 | return FALSE; |
252b5132 | 1032 | |
5732c114 AM |
1033 | /* Some fields in the first section header handle overflow of ehdr |
1034 | fields. */ | |
ecd12bc1 AM |
1035 | if (i_ehdrp->e_phnum >= PN_XNUM) |
1036 | i_shdrp[0]->sh_info = i_ehdrp->e_phnum; | |
4fbb74a6 | 1037 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1038 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1039 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1040 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1041 | ||
3e932841 | 1042 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
1043 | amt = i_ehdrp->e_shnum; |
1044 | amt *= sizeof (*x_shdrp); | |
a50b1753 | 1045 | x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt); |
252b5132 | 1046 | if (!x_shdrp) |
b34976b6 | 1047 | return FALSE; |
252b5132 | 1048 | |
5732c114 | 1049 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1050 | { |
1051 | #if DEBUG & 2 | |
5732c114 | 1052 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1053 | #endif |
5732c114 | 1054 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
252b5132 RH |
1055 | } |
1056 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 1057 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1058 | return FALSE; |
252b5132 | 1059 | |
3e932841 | 1060 | /* need to dump the string table too... */ |
252b5132 | 1061 | |
b34976b6 | 1062 | return TRUE; |
252b5132 RH |
1063 | } |
1064 | ||
d94838b1 RM |
1065 | bfd_boolean |
1066 | elf_checksum_contents (bfd *abfd, | |
1067 | void (*process) (const void *, size_t, void *), | |
1068 | void *arg) | |
1069 | { | |
1070 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1071 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1072 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1073 | unsigned int count, num; | |
1074 | ||
1075 | { | |
1076 | Elf_External_Ehdr x_ehdr; | |
1077 | Elf_Internal_Ehdr i_ehdr; | |
1078 | ||
1079 | i_ehdr = *i_ehdrp; | |
1080 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1081 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1082 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1083 | } | |
1084 | ||
1085 | num = i_ehdrp->e_phnum; | |
1086 | for (count = 0; count < num; count++) | |
1087 | { | |
1088 | Elf_External_Phdr x_phdr; | |
1089 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1090 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1091 | } | |
1092 | ||
1093 | num = elf_numsections (abfd); | |
1094 | for (count = 0; count < num; count++) | |
1095 | { | |
1096 | Elf_Internal_Shdr i_shdr; | |
1097 | Elf_External_Shdr x_shdr; | |
9f7c3e5e | 1098 | bfd_byte *contents, *free_contents; |
d94838b1 RM |
1099 | |
1100 | i_shdr = *i_shdrp[count]; | |
1101 | i_shdr.sh_offset = 0; | |
1102 | ||
1103 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1104 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1105 | ||
9f7c3e5e AM |
1106 | /* Process the section's contents, if it has some. |
1107 | PR ld/12451: Read them in if necessary. */ | |
1108 | if (i_shdr.sh_type == SHT_NOBITS) | |
1109 | continue; | |
1110 | free_contents = NULL; | |
1111 | contents = i_shdr.contents; | |
1112 | if (contents == NULL) | |
4d48ecf3 NC |
1113 | { |
1114 | asection *sec; | |
1115 | ||
1116 | sec = bfd_section_from_elf_index (abfd, count); | |
1117 | if (sec != NULL) | |
1118 | { | |
9f7c3e5e AM |
1119 | contents = sec->contents; |
1120 | if (contents == NULL) | |
4d48ecf3 NC |
1121 | { |
1122 | /* Force rereading from file. */ | |
1123 | sec->flags &= ~SEC_IN_MEMORY; | |
9f7c3e5e | 1124 | if (!bfd_malloc_and_get_section (abfd, sec, &free_contents)) |
4d48ecf3 | 1125 | continue; |
9f7c3e5e | 1126 | contents = free_contents; |
4d48ecf3 | 1127 | } |
4d48ecf3 NC |
1128 | } |
1129 | } | |
9f7c3e5e AM |
1130 | if (contents != NULL) |
1131 | { | |
1132 | (*process) (contents, i_shdr.sh_size, arg); | |
1133 | if (free_contents != NULL) | |
1134 | free (free_contents); | |
1135 | } | |
d94838b1 RM |
1136 | } |
1137 | ||
1138 | return TRUE; | |
1139 | } | |
1140 | ||
252b5132 | 1141 | long |
268b6b39 | 1142 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1143 | { |
1144 | Elf_Internal_Shdr *hdr; | |
1145 | Elf_Internal_Shdr *verhdr; | |
1146 | unsigned long symcount; /* Number of external ELF symbols */ | |
1147 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1148 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1149 | Elf_Internal_Sym *isym; |
1150 | Elf_Internal_Sym *isymend; | |
1151 | Elf_Internal_Sym *isymbuf = NULL; | |
1152 | Elf_External_Versym *xver; | |
1153 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1154 | const struct elf_backend_data *ebd; |
dc810e39 | 1155 | bfd_size_type amt; |
252b5132 RH |
1156 | |
1157 | /* Read each raw ELF symbol, converting from external ELF form to | |
1158 | internal ELF form, and then using the information to create a | |
1159 | canonical bfd symbol table entry. | |
1160 | ||
1161 | Note that we allocate the initial bfd canonical symbol buffer | |
1162 | based on a one-to-one mapping of the ELF symbols to canonical | |
1163 | symbols. We actually use all the ELF symbols, so there will be no | |
1164 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1165 | build the caller's pointer vector. */ |
252b5132 RH |
1166 | |
1167 | if (! dynamic) | |
1168 | { | |
1169 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1170 | verhdr = NULL; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1175 | if (elf_dynversym (abfd) == 0) | |
1176 | verhdr = NULL; | |
1177 | else | |
1178 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
12bd6957 | 1179 | if ((elf_dynverdef (abfd) != 0 |
252b5132 | 1180 | && elf_tdata (abfd)->verdef == NULL) |
12bd6957 | 1181 | || (elf_dynverref (abfd) != 0 |
252b5132 RH |
1182 | && elf_tdata (abfd)->verref == NULL)) |
1183 | { | |
fc0e6df6 | 1184 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1185 | return -1; |
1186 | } | |
1187 | } | |
1188 | ||
6cdc0ccc | 1189 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1190 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1191 | if (symcount == 0) |
1192 | sym = symbase = NULL; | |
1193 | else | |
1194 | { | |
6cdc0ccc AM |
1195 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1196 | NULL, NULL, NULL); | |
1197 | if (isymbuf == NULL) | |
1198 | return -1; | |
252b5132 | 1199 | |
dc810e39 AM |
1200 | amt = symcount; |
1201 | amt *= sizeof (elf_symbol_type); | |
a50b1753 | 1202 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt); |
252b5132 | 1203 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1204 | goto error_return; |
252b5132 RH |
1205 | |
1206 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1207 | if (verhdr != NULL |
1208 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1209 | { | |
4eca0228 | 1210 | _bfd_error_handler |
695344c0 | 1211 | /* xgettext:c-format */ |
2dcf00ce AM |
1212 | (_("%pB: version count (%" PRId64 ")" |
1213 | " does not match symbol count (%ld)"), | |
dae82561 | 1214 | abfd, |
2dcf00ce | 1215 | (int64_t) (verhdr->sh_size / sizeof (Elf_External_Versym)), |
252b5132 RH |
1216 | symcount); |
1217 | ||
1218 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1219 | since that is more helpful than just quitting. */ |
252b5132 RH |
1220 | verhdr = NULL; |
1221 | } | |
1222 | ||
1223 | if (verhdr != NULL) | |
1224 | { | |
1225 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1226 | goto error_return; | |
1227 | ||
a50b1753 | 1228 | xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1229 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1230 | goto error_return; |
1231 | ||
268b6b39 | 1232 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1233 | goto error_return; |
1234 | } | |
1235 | ||
1236 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1237 | xver = xverbuf; |
1238 | if (xver != NULL) | |
1239 | ++xver; | |
1240 | isymend = isymbuf + symcount; | |
1241 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1242 | { |
6cdc0ccc | 1243 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 | 1244 | |
896ca098 | 1245 | sym->symbol.the_bfd = abfd; |
26c61ae5 | 1246 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
6cdc0ccc | 1247 | sym->symbol.value = isym->st_value; |
252b5132 | 1248 | |
6cdc0ccc | 1249 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1250 | { |
1251 | sym->symbol.section = bfd_und_section_ptr; | |
1252 | } | |
6cdc0ccc | 1253 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1254 | { |
1255 | sym->symbol.section = bfd_abs_section_ptr; | |
1256 | } | |
6cdc0ccc | 1257 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1258 | { |
1259 | sym->symbol.section = bfd_com_section_ptr; | |
02d00247 AM |
1260 | if ((abfd->flags & BFD_PLUGIN) != 0) |
1261 | { | |
1262 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
1263 | ||
1264 | if (xc == NULL) | |
1265 | { | |
1266 | flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
1267 | | SEC_EXCLUDE); | |
1268 | xc = bfd_make_section_with_flags (abfd, "COMMON", flags); | |
1269 | if (xc == NULL) | |
1270 | goto error_return; | |
1271 | } | |
1272 | sym->symbol.section = xc; | |
1273 | } | |
252b5132 RH |
1274 | /* Elf puts the alignment into the `value' field, and |
1275 | the size into the `size' field. BFD wants to see the | |
1276 | size in the value field, and doesn't care (at the | |
1277 | moment) about the alignment. */ | |
6cdc0ccc | 1278 | sym->symbol.value = isym->st_size; |
252b5132 | 1279 | } |
252b5132 | 1280 | else |
cb33740c AM |
1281 | { |
1282 | sym->symbol.section | |
1283 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1284 | if (sym->symbol.section == NULL) | |
1285 | { | |
1286 | /* This symbol is in a section for which we did not | |
1287 | create a BFD section. Just use bfd_abs_section, | |
1288 | although it is wrong. FIXME. */ | |
1289 | sym->symbol.section = bfd_abs_section_ptr; | |
1290 | } | |
1291 | } | |
252b5132 | 1292 | |
1049f94e | 1293 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1294 | already section relative. */ |
252b5132 RH |
1295 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1296 | sym->symbol.value -= sym->symbol.section->vma; | |
1297 | ||
6cdc0ccc | 1298 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1299 | { |
1300 | case STB_LOCAL: | |
1301 | sym->symbol.flags |= BSF_LOCAL; | |
1302 | break; | |
1303 | case STB_GLOBAL: | |
6cdc0ccc | 1304 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1305 | sym->symbol.flags |= BSF_GLOBAL; |
1306 | break; | |
1307 | case STB_WEAK: | |
1308 | sym->symbol.flags |= BSF_WEAK; | |
1309 | break; | |
3e7a7d11 NC |
1310 | case STB_GNU_UNIQUE: |
1311 | sym->symbol.flags |= BSF_GNU_UNIQUE; | |
1312 | break; | |
252b5132 RH |
1313 | } |
1314 | ||
6cdc0ccc | 1315 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1316 | { |
1317 | case STT_SECTION: | |
1318 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1319 | break; | |
1320 | case STT_FILE: | |
1321 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1322 | break; | |
1323 | case STT_FUNC: | |
1324 | sym->symbol.flags |= BSF_FUNCTION; | |
1325 | break; | |
504b7d20 NC |
1326 | case STT_COMMON: |
1327 | /* FIXME: Do we have to put the size field into the value field | |
1328 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
b8871f35 | 1329 | sym->symbol.flags |= BSF_ELF_COMMON; |
504b7d20 | 1330 | /* Fall through. */ |
252b5132 RH |
1331 | case STT_OBJECT: |
1332 | sym->symbol.flags |= BSF_OBJECT; | |
1333 | break; | |
0be9069d L |
1334 | case STT_TLS: |
1335 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1336 | break; | |
d9352518 DB |
1337 | case STT_RELC: |
1338 | sym->symbol.flags |= BSF_RELC; | |
1339 | break; | |
1340 | case STT_SRELC: | |
1341 | sym->symbol.flags |= BSF_SRELC; | |
1342 | break; | |
d8045f23 NC |
1343 | case STT_GNU_IFUNC: |
1344 | sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION; | |
1345 | break; | |
252b5132 RH |
1346 | } |
1347 | ||
1348 | if (dynamic) | |
1349 | sym->symbol.flags |= BSF_DYNAMIC; | |
1350 | ||
6cdc0ccc | 1351 | if (xver != NULL) |
252b5132 RH |
1352 | { |
1353 | Elf_Internal_Versym iversym; | |
1354 | ||
6cdc0ccc | 1355 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1356 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1357 | xver++; |
252b5132 RH |
1358 | } |
1359 | ||
1360 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1361 | if (ebd->elf_backend_symbol_processing) |
1362 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1363 | } |
1364 | } | |
1365 | ||
1366 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1367 | if (ebd->elf_backend_symbol_table_processing) |
1368 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1369 | |
1370 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1371 | ||
1372 | symcount = sym - symbase; | |
1373 | ||
1374 | /* Fill in the user's symbol pointer vector if needed. */ | |
1375 | if (symptrs) | |
1376 | { | |
1377 | long l = symcount; | |
1378 | ||
1379 | sym = symbase; | |
1380 | while (l-- > 0) | |
1381 | { | |
1382 | *symptrs++ = &sym->symbol; | |
1383 | sym++; | |
1384 | } | |
1385 | *symptrs = 0; /* Final null pointer */ | |
1386 | } | |
1387 | ||
6cdc0ccc AM |
1388 | if (xverbuf != NULL) |
1389 | free (xverbuf); | |
1390 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1391 | free (isymbuf); | |
252b5132 | 1392 | return symcount; |
9ad5cbcf | 1393 | |
252b5132 | 1394 | error_return: |
6cdc0ccc AM |
1395 | if (xverbuf != NULL) |
1396 | free (xverbuf); | |
1397 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1398 | free (isymbuf); | |
252b5132 RH |
1399 | return -1; |
1400 | } | |
1401 | ||
5c799c07 | 1402 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1403 | them. */ |
252b5132 | 1404 | |
b34976b6 | 1405 | static bfd_boolean |
268b6b39 AM |
1406 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1407 | asection *asect, | |
1408 | Elf_Internal_Shdr *rel_hdr, | |
1409 | bfd_size_type reloc_count, | |
1410 | arelent *relents, | |
1411 | asymbol **symbols, | |
1412 | bfd_boolean dynamic) | |
252b5132 | 1413 | { |
9c5bfbb7 | 1414 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1415 | void *allocated = NULL; |
252b5132 | 1416 | bfd_byte *native_relocs; |
252b5132 RH |
1417 | arelent *relent; |
1418 | unsigned int i; | |
1419 | int entsize; | |
5ad8645c | 1420 | unsigned int symcount; |
252b5132 | 1421 | |
268b6b39 | 1422 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1423 | if (allocated == NULL) |
1424 | goto error_return; | |
1425 | ||
1426 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1427 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1428 | != rel_hdr->sh_size)) |
1429 | goto error_return; | |
1430 | ||
a50b1753 | 1431 | native_relocs = (bfd_byte *) allocated; |
252b5132 | 1432 | |
252b5132 RH |
1433 | entsize = rel_hdr->sh_entsize; |
1434 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1435 | || entsize == sizeof (Elf_External_Rela)); | |
1436 | ||
5ad8645c AM |
1437 | if (dynamic) |
1438 | symcount = bfd_get_dynamic_symcount (abfd); | |
1439 | else | |
1440 | symcount = bfd_get_symcount (abfd); | |
1441 | ||
252b5132 RH |
1442 | for (i = 0, relent = relents; |
1443 | i < reloc_count; | |
1444 | i++, relent++, native_relocs += entsize) | |
1445 | { | |
f3185997 | 1446 | bfd_boolean res; |
252b5132 | 1447 | Elf_Internal_Rela rela; |
252b5132 RH |
1448 | |
1449 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1450 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1451 | else |
947216bf | 1452 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1453 | |
1454 | /* The address of an ELF reloc is section relative for an object | |
1455 | file, and absolute for an executable file or shared library. | |
1456 | The address of a normal BFD reloc is always section relative, | |
1457 | and the address of a dynamic reloc is absolute.. */ | |
1458 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1459 | relent->address = rela.r_offset; | |
1460 | else | |
1461 | relent->address = rela.r_offset - asect->vma; | |
1462 | ||
cf35638d | 1463 | if (ELF_R_SYM (rela.r_info) == STN_UNDEF) |
0ee5a0e4 AM |
1464 | /* FIXME: This and the error case below mean that we have a |
1465 | symbol on relocs that is not elf_symbol_type. */ | |
252b5132 | 1466 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
05a487dc | 1467 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c | 1468 | { |
4eca0228 | 1469 | _bfd_error_handler |
695344c0 | 1470 | /* xgettext:c-format */ |
871b3ab2 | 1471 | (_("%pB(%pA): relocation %d has invalid symbol index %ld"), |
76cfced5 | 1472 | abfd, asect, i, (long) ELF_R_SYM (rela.r_info)); |
f3185997 | 1473 | bfd_set_error (bfd_error_bad_value); |
45dfa85a | 1474 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
1f70368c | 1475 | } |
252b5132 RH |
1476 | else |
1477 | { | |
b48c61bc | 1478 | asymbol **ps; |
28c9d252 | 1479 | |
252b5132 | 1480 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1481 | |
f9cfae62 | 1482 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1483 | } |
1484 | ||
1485 | relent->addend = rela.r_addend; | |
1486 | ||
90fff0d4 DJ |
1487 | if ((entsize == sizeof (Elf_External_Rela) |
1488 | && ebd->elf_info_to_howto != NULL) | |
1489 | || ebd->elf_info_to_howto_rel == NULL) | |
f3185997 | 1490 | res = ebd->elf_info_to_howto (abfd, relent, &rela); |
252b5132 | 1491 | else |
f3185997 NC |
1492 | res = ebd->elf_info_to_howto_rel (abfd, relent, &rela); |
1493 | ||
1494 | if (! res || relent->howto == NULL) | |
1495 | goto error_return; | |
252b5132 RH |
1496 | } |
1497 | ||
252b5132 RH |
1498 | if (allocated != NULL) |
1499 | free (allocated); | |
b34976b6 | 1500 | return TRUE; |
252b5132 RH |
1501 | |
1502 | error_return: | |
1503 | if (allocated != NULL) | |
1504 | free (allocated); | |
b34976b6 | 1505 | return FALSE; |
252b5132 RH |
1506 | } |
1507 | ||
42fdc509 MM |
1508 | /* Read in and swap the external relocs. */ |
1509 | ||
b34976b6 | 1510 | bfd_boolean |
268b6b39 AM |
1511 | elf_slurp_reloc_table (bfd *abfd, |
1512 | asection *asect, | |
1513 | asymbol **symbols, | |
1514 | bfd_boolean dynamic) | |
42fdc509 MM |
1515 | { |
1516 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1517 | Elf_Internal_Shdr *rel_hdr; | |
1518 | Elf_Internal_Shdr *rel_hdr2; | |
1519 | bfd_size_type reloc_count; | |
1520 | bfd_size_type reloc_count2; | |
1521 | arelent *relents; | |
dc810e39 | 1522 | bfd_size_type amt; |
42fdc509 MM |
1523 | |
1524 | if (asect->relocation != NULL) | |
b34976b6 | 1525 | return TRUE; |
42fdc509 MM |
1526 | |
1527 | if (! dynamic) | |
1528 | { | |
1529 | if ((asect->flags & SEC_RELOC) == 0 | |
1530 | || asect->reloc_count == 0) | |
b34976b6 | 1531 | return TRUE; |
42fdc509 | 1532 | |
d4730f92 BS |
1533 | rel_hdr = d->rel.hdr; |
1534 | reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0; | |
1535 | rel_hdr2 = d->rela.hdr; | |
1536 | reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0; | |
42fdc509 | 1537 | |
06614111 NC |
1538 | /* PR 17512: file: 0b4f81b7. */ |
1539 | if (asect->reloc_count != reloc_count + reloc_count2) | |
1540 | return FALSE; | |
d4730f92 | 1541 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
42fdc509 MM |
1542 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
1543 | ||
1544 | } | |
1545 | else | |
1546 | { | |
57e21bef MM |
1547 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1548 | case because relocations against this section may use the | |
1549 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1550 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1551 | if (asect->size == 0) |
b34976b6 | 1552 | return TRUE; |
42fdc509 MM |
1553 | |
1554 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1555 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1556 | rel_hdr2 = NULL; |
57e21bef | 1557 | reloc_count2 = 0; |
42fdc509 MM |
1558 | } |
1559 | ||
dc810e39 | 1560 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
a50b1753 | 1561 | relents = (arelent *) bfd_alloc (abfd, amt); |
42fdc509 | 1562 | if (relents == NULL) |
b34976b6 | 1563 | return FALSE; |
42fdc509 | 1564 | |
d4730f92 BS |
1565 | if (rel_hdr |
1566 | && !elf_slurp_reloc_table_from_section (abfd, asect, | |
1567 | rel_hdr, reloc_count, | |
1568 | relents, | |
1569 | symbols, dynamic)) | |
b34976b6 | 1570 | return FALSE; |
60bcf0fa NC |
1571 | |
1572 | if (rel_hdr2 | |
42fdc509 MM |
1573 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1574 | rel_hdr2, reloc_count2, | |
1575 | relents + reloc_count, | |
1576 | symbols, dynamic)) | |
b34976b6 | 1577 | return FALSE; |
42fdc509 | 1578 | |
42fdc509 | 1579 | asect->relocation = relents; |
b34976b6 | 1580 | return TRUE; |
42fdc509 MM |
1581 | } |
1582 | ||
e460dd0d | 1583 | #if DEBUG & 2 |
252b5132 | 1584 | static void |
268b6b39 | 1585 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1586 | { |
1587 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1588 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1589 | (long) hdr); | |
1590 | fprintf (stderr, | |
1591 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1592 | (long) hdr->sh_name, | |
1593 | (long) hdr->sh_type, | |
1594 | (long) hdr->sh_flags); | |
1595 | fprintf (stderr, | |
1596 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1597 | (long) hdr->sh_addr, | |
1598 | (long) hdr->sh_offset, | |
1599 | (long) hdr->sh_size); | |
1600 | fprintf (stderr, | |
1601 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1602 | (long) hdr->sh_link, | |
1603 | (long) hdr->sh_info, | |
1604 | (long) hdr->sh_addralign); | |
1605 | fprintf (stderr, "sh_entsize = %ld\n", | |
1606 | (long) hdr->sh_entsize); | |
1607 | fflush (stderr); | |
1608 | } | |
e460dd0d | 1609 | #endif |
252b5132 | 1610 | |
e460dd0d | 1611 | #if DEBUG & 1 |
252b5132 | 1612 | static void |
268b6b39 | 1613 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1614 | { |
1615 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1616 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1617 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1618 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1619 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1620 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1621 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1622 | } | |
252b5132 RH |
1623 | #endif |
1624 | \f | |
8d6337fe | 1625 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
5979d6b6 AM |
1626 | reconstruct an ELF file by reading the segments out of remote |
1627 | memory based on the ELF file header at EHDR_VMA and the ELF program | |
1628 | headers it points to. If non-zero, SIZE is the known extent of the | |
1629 | object. If not null, *LOADBASEP is filled in with the difference | |
1630 | between the VMAs from which the segments were read, and the VMAs | |
1631 | the file headers (and hence BFD's idea of each section's VMA) put | |
1632 | them at. | |
1633 | ||
1634 | The function TARGET_READ_MEMORY is called to copy LEN bytes from | |
1635 | the remote memory at target address VMA into the local buffer at | |
1636 | MYADDR; it should return zero on success or an `errno' code on | |
1637 | failure. TEMPL must be a BFD for a target with the word size and | |
1638 | byte order found in the remote memory. */ | |
8d6337fe RM |
1639 | |
1640 | bfd * | |
268b6b39 AM |
1641 | NAME(_bfd_elf,bfd_from_remote_memory) |
1642 | (bfd *templ, | |
1643 | bfd_vma ehdr_vma, | |
f0a5d95a | 1644 | bfd_size_type size, |
268b6b39 | 1645 | bfd_vma *loadbasep, |
fe78531d | 1646 | int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)) |
8d6337fe RM |
1647 | { |
1648 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1649 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1650 | Elf_External_Phdr *x_phdrs; | |
5979d6b6 | 1651 | Elf_Internal_Phdr *i_phdrs, *last_phdr, *first_phdr; |
8d6337fe RM |
1652 | bfd *nbfd; |
1653 | struct bfd_in_memory *bim; | |
f075ee0c | 1654 | bfd_byte *contents; |
8d6337fe RM |
1655 | int err; |
1656 | unsigned int i; | |
5979d6b6 AM |
1657 | bfd_vma high_offset; |
1658 | bfd_vma shdr_end; | |
8d6337fe RM |
1659 | bfd_vma loadbase; |
1660 | ||
1661 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1662 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1663 | if (err) |
1664 | { | |
1665 | bfd_set_error (bfd_error_system_call); | |
1666 | errno = err; | |
1667 | return NULL; | |
1668 | } | |
1669 | ||
1670 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1671 | make use of. The magic number must match, the address size ('class') | |
1672 | and byte-swapping must match our XVEC entry. */ | |
1673 | ||
1674 | if (! elf_file_p (&x_ehdr) | |
1675 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1676 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1677 | { | |
1678 | bfd_set_error (bfd_error_wrong_format); | |
1679 | return NULL; | |
1680 | } | |
1681 | ||
1682 | /* Check that file's byte order matches xvec's */ | |
1683 | switch (x_ehdr.e_ident[EI_DATA]) | |
1684 | { | |
1685 | case ELFDATA2MSB: /* Big-endian */ | |
1686 | if (! bfd_header_big_endian (templ)) | |
1687 | { | |
1688 | bfd_set_error (bfd_error_wrong_format); | |
1689 | return NULL; | |
1690 | } | |
1691 | break; | |
1692 | case ELFDATA2LSB: /* Little-endian */ | |
1693 | if (! bfd_header_little_endian (templ)) | |
1694 | { | |
1695 | bfd_set_error (bfd_error_wrong_format); | |
1696 | return NULL; | |
1697 | } | |
1698 | break; | |
1699 | case ELFDATANONE: /* No data encoding specified */ | |
1700 | default: /* Unknown data encoding specified */ | |
1701 | bfd_set_error (bfd_error_wrong_format); | |
1702 | return NULL; | |
1703 | } | |
1704 | ||
1705 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1706 | ||
1707 | /* The file header tells where to find the program headers. | |
1708 | These are what we use to actually choose what to read. */ | |
1709 | ||
1710 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1711 | { | |
1712 | bfd_set_error (bfd_error_wrong_format); | |
1713 | return NULL; | |
1714 | } | |
1715 | ||
a50b1753 NC |
1716 | x_phdrs = (Elf_External_Phdr *) |
1717 | bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); | |
8d6337fe | 1718 | if (x_phdrs == NULL) |
5979d6b6 | 1719 | return NULL; |
f075ee0c | 1720 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1721 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1722 | if (err) | |
1723 | { | |
1724 | free (x_phdrs); | |
1725 | bfd_set_error (bfd_error_system_call); | |
1726 | errno = err; | |
1727 | return NULL; | |
1728 | } | |
1729 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1730 | ||
5979d6b6 AM |
1731 | high_offset = 0; |
1732 | loadbase = 0; | |
1733 | first_phdr = NULL; | |
8d6337fe | 1734 | last_phdr = NULL; |
8d6337fe RM |
1735 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1736 | { | |
1737 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1738 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1739 | { |
5979d6b6 AM |
1740 | bfd_vma segment_end = i_phdrs[i].p_offset + i_phdrs[i].p_filesz; |
1741 | ||
1742 | if (segment_end > high_offset) | |
3fec76aa | 1743 | { |
5979d6b6 AM |
1744 | high_offset = segment_end; |
1745 | last_phdr = &i_phdrs[i]; | |
3fec76aa | 1746 | } |
8d6337fe | 1747 | |
5979d6b6 AM |
1748 | /* If this program header covers offset zero, where the file |
1749 | header sits, then we can figure out the loadbase. */ | |
1750 | if (first_phdr == NULL) | |
1751 | { | |
1752 | bfd_vma p_offset = i_phdrs[i].p_offset; | |
1753 | bfd_vma p_vaddr = i_phdrs[i].p_vaddr; | |
1754 | ||
1755 | if (i_phdrs[i].p_align > 1) | |
1756 | { | |
1757 | p_offset &= -i_phdrs[i].p_align; | |
1758 | p_vaddr &= -i_phdrs[i].p_align; | |
1759 | } | |
1760 | if (p_offset == 0) | |
1761 | { | |
1762 | loadbase = ehdr_vma - p_vaddr; | |
1763 | first_phdr = &i_phdrs[i]; | |
1764 | } | |
1765 | } | |
8d6337fe RM |
1766 | } |
1767 | } | |
5979d6b6 | 1768 | if (high_offset == 0) |
8d6337fe RM |
1769 | { |
1770 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1771 | free (x_phdrs); | |
1772 | bfd_set_error (bfd_error_wrong_format); | |
1773 | return NULL; | |
1774 | } | |
1775 | ||
5979d6b6 AM |
1776 | shdr_end = 0; |
1777 | if (i_ehdr.e_shoff != 0 && i_ehdr.e_shnum != 0 && i_ehdr.e_shentsize != 0) | |
8d6337fe | 1778 | { |
5979d6b6 AM |
1779 | shdr_end = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; |
1780 | ||
1781 | if (last_phdr->p_filesz != last_phdr->p_memsz) | |
1782 | { | |
1783 | /* If the last PT_LOAD header has a bss area then ld.so will | |
1784 | have cleared anything past p_filesz, zapping the section | |
1785 | headers. */ | |
1786 | } | |
1787 | else if (size >= shdr_end) | |
92c9bcd4 | 1788 | high_offset = size; |
5979d6b6 AM |
1789 | else |
1790 | { | |
1791 | bfd_vma page_size = get_elf_backend_data (templ)->minpagesize; | |
1792 | bfd_vma segment_end = last_phdr->p_offset + last_phdr->p_filesz; | |
1793 | ||
1794 | /* Assume we loaded full pages, allowing us to sometimes see | |
1795 | section headers. */ | |
1796 | if (page_size > 1 && shdr_end > segment_end) | |
1797 | { | |
1798 | bfd_vma page_end = (segment_end + page_size - 1) & -page_size; | |
1799 | ||
1800 | if (page_end >= shdr_end) | |
1801 | /* Whee, section headers covered. */ | |
1802 | high_offset = shdr_end; | |
1803 | } | |
1804 | } | |
8d6337fe | 1805 | } |
8d6337fe RM |
1806 | |
1807 | /* Now we know the size of the whole image we want read in. */ | |
5979d6b6 | 1808 | contents = (bfd_byte *) bfd_zmalloc (high_offset); |
8d6337fe RM |
1809 | if (contents == NULL) |
1810 | { | |
1811 | free (x_phdrs); | |
8d6337fe RM |
1812 | return NULL; |
1813 | } | |
1814 | ||
1815 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1816 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1817 | { |
5979d6b6 AM |
1818 | bfd_vma start = i_phdrs[i].p_offset; |
1819 | bfd_vma end = start + i_phdrs[i].p_filesz; | |
1820 | bfd_vma vaddr = i_phdrs[i].p_vaddr; | |
1821 | ||
1822 | /* Extend the beginning of the first pt_load to cover file | |
1823 | header and program headers, if we proved earlier that its | |
1824 | aligned offset is 0. */ | |
1825 | if (first_phdr == &i_phdrs[i]) | |
1826 | { | |
1827 | vaddr -= start; | |
1828 | start = 0; | |
1829 | } | |
1830 | /* Extend the end of the last pt_load to cover section headers. */ | |
1831 | if (last_phdr == &i_phdrs[i]) | |
1832 | end = high_offset; | |
1833 | err = target_read_memory (loadbase + vaddr, | |
8d6337fe RM |
1834 | contents + start, end - start); |
1835 | if (err) | |
1836 | { | |
1837 | free (x_phdrs); | |
1838 | free (contents); | |
1839 | bfd_set_error (bfd_error_system_call); | |
1840 | errno = err; | |
1841 | return NULL; | |
1842 | } | |
1843 | } | |
1844 | free (x_phdrs); | |
1845 | ||
1846 | /* If the segments visible in memory didn't include the section headers, | |
1847 | then clear them from the file header. */ | |
5979d6b6 | 1848 | if (high_offset < shdr_end) |
8d6337fe RM |
1849 | { |
1850 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1851 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1852 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1853 | } | |
1854 | ||
1855 | /* This will normally have been in the first PT_LOAD segment. But it | |
1856 | conceivably could be missing, and we might have just changed it. */ | |
1857 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1858 | ||
1859 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
a50b1753 | 1860 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1861 | if (bim == NULL) |
1862 | { | |
1863 | free (contents); | |
8d6337fe RM |
1864 | return NULL; |
1865 | } | |
1866 | nbfd = _bfd_new_bfd (); | |
1867 | if (nbfd == NULL) | |
1868 | { | |
1869 | free (bim); | |
1870 | free (contents); | |
8d6337fe RM |
1871 | return NULL; |
1872 | } | |
1be5090b | 1873 | nbfd->filename = xstrdup ("<in-memory>"); |
8d6337fe | 1874 | nbfd->xvec = templ->xvec; |
5979d6b6 | 1875 | bim->size = high_offset; |
8d6337fe | 1876 | bim->buffer = contents; |
268b6b39 | 1877 | nbfd->iostream = bim; |
8d6337fe | 1878 | nbfd->flags = BFD_IN_MEMORY; |
65077aa8 TG |
1879 | nbfd->iovec = &_bfd_memory_iovec; |
1880 | nbfd->origin = 0; | |
8d6337fe RM |
1881 | nbfd->direction = read_direction; |
1882 | nbfd->mtime = time (NULL); | |
1883 | nbfd->mtime_set = TRUE; | |
1884 | ||
1885 | if (loadbasep) | |
1886 | *loadbasep = loadbase; | |
1887 | return nbfd; | |
1888 | } | |
a836572f L |
1889 | |
1890 | /* Function for ELF_R_INFO. */ | |
1891 | ||
1892 | bfd_vma | |
1893 | NAME(elf,r_info) (bfd_vma sym, bfd_vma type) | |
1894 | { | |
1895 | return ELF_R_INFO (sym, type); | |
1896 | } | |
1897 | ||
1898 | /* Function for ELF_R_SYM. */ | |
1899 | ||
1900 | bfd_vma | |
1901 | NAME(elf,r_sym) (bfd_vma r_info) | |
1902 | { | |
1903 | return ELF_R_SYM (r_info); | |
1904 | } | |
8d6337fe | 1905 | \f |
252b5132 | 1906 | #include "elfcore.h" |
252b5132 RH |
1907 | \f |
1908 | /* Size-dependent data and functions. */ | |
1909 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1910 | sizeof (Elf_External_Ehdr), | |
1911 | sizeof (Elf_External_Phdr), | |
1912 | sizeof (Elf_External_Shdr), | |
1913 | sizeof (Elf_External_Rel), | |
1914 | sizeof (Elf_External_Rela), | |
1915 | sizeof (Elf_External_Sym), | |
1916 | sizeof (Elf_External_Dyn), | |
1917 | sizeof (Elf_External_Note), | |
70bcb145 | 1918 | 4, |
c7ac6ff8 | 1919 | 1, |
45d6a902 | 1920 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1921 | ELFCLASS, EV_CURRENT, |
1922 | elf_write_out_phdrs, | |
1923 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1924 | elf_checksum_contents, |
b9f66672 | 1925 | elf_write_relocs, |
73ff0d56 | 1926 | elf_swap_symbol_in, |
252b5132 RH |
1927 | elf_swap_symbol_out, |
1928 | elf_slurp_reloc_table, | |
1929 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1930 | elf_swap_dyn_in, |
1931 | elf_swap_dyn_out, | |
947216bf AM |
1932 | elf_swap_reloc_in, |
1933 | elf_swap_reloc_out, | |
1934 | elf_swap_reloca_in, | |
1935 | elf_swap_reloca_out | |
252b5132 | 1936 | }; |