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252b5132 | 1 | /* ELF executable support for BFD. |
a2c58332 | 2 | Copyright (C) 1991-2022 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 | |
0a1b45a2 | 173 | bool |
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) | |
0a1b45a2 | 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; |
0a1b45a2 | 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) | |
ca52626b NC |
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. */ | |
7c5fa58e AM |
320 | if (dst->sh_type != SHT_NOBITS) |
321 | { | |
322 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
323 | ||
75e100a3 AM |
324 | if (filesize != 0 |
325 | && ((ufile_ptr) dst->sh_offset > filesize | |
326 | || dst->sh_size > filesize - dst->sh_offset)) | |
327 | { | |
c45c3dba AM |
328 | if (!abfd->read_only) |
329 | _bfd_error_handler (_("warning: %pB has a section " | |
330 | "extending past end of file"), abfd); | |
75e100a3 | 331 | abfd->read_only = 1; |
75e100a3 | 332 | } |
7c5fa58e | 333 | } |
dc810e39 AM |
334 | dst->sh_link = H_GET_32 (abfd, src->sh_link); |
335 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
336 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
337 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
338 | dst->bfd_section = NULL; |
339 | dst->contents = NULL; | |
340 | } | |
341 | ||
342 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 343 | ELF section header table entry in external format. */ |
252b5132 RH |
344 | |
345 | static void | |
268b6b39 AM |
346 | elf_swap_shdr_out (bfd *abfd, |
347 | const Elf_Internal_Shdr *src, | |
348 | Elf_External_Shdr *dst) | |
252b5132 | 349 | { |
3e932841 | 350 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
351 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
352 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
353 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
354 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
355 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
356 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
357 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
358 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
359 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
360 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
361 | } |
362 | ||
252b5132 | 363 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 364 | ELF program header table entry in internal format. */ |
252b5132 RH |
365 | |
366 | void | |
268b6b39 AM |
367 | elf_swap_phdr_in (bfd *abfd, |
368 | const Elf_External_Phdr *src, | |
369 | Elf_Internal_Phdr *dst) | |
252b5132 | 370 | { |
86dc0f79 RH |
371 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
372 | ||
dc810e39 AM |
373 | dst->p_type = H_GET_32 (abfd, src->p_type); |
374 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
375 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
376 | if (signed_vma) |
377 | { | |
dc810e39 AM |
378 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
379 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
380 | } |
381 | else | |
382 | { | |
dc810e39 AM |
383 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
384 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 385 | } |
dc810e39 AM |
386 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
387 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
388 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
389 | } |
390 | ||
391 | void | |
268b6b39 AM |
392 | elf_swap_phdr_out (bfd *abfd, |
393 | const Elf_Internal_Phdr *src, | |
394 | Elf_External_Phdr *dst) | |
252b5132 | 395 | { |
147d51c2 L |
396 | const struct elf_backend_data *bed; |
397 | bfd_vma p_paddr; | |
398 | ||
399 | bed = get_elf_backend_data (abfd); | |
400 | p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr; | |
401 | ||
3e932841 | 402 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
403 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
404 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
405 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
147d51c2 | 406 | H_PUT_WORD (abfd, p_paddr, dst->p_paddr); |
dc810e39 AM |
407 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); |
408 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
409 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
410 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
411 | } |
412 | ||
3e932841 | 413 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 414 | void |
268b6b39 AM |
415 | elf_swap_reloc_in (bfd *abfd, |
416 | const bfd_byte *s, | |
417 | Elf_Internal_Rela *dst) | |
252b5132 | 418 | { |
947216bf | 419 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
420 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
421 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 422 | dst->r_addend = 0; |
252b5132 RH |
423 | } |
424 | ||
947216bf | 425 | void |
268b6b39 AM |
426 | elf_swap_reloca_in (bfd *abfd, |
427 | const bfd_byte *s, | |
428 | Elf_Internal_Rela *dst) | |
252b5132 | 429 | { |
947216bf | 430 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
431 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
432 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
433 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
434 | } |
435 | ||
3e932841 | 436 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 437 | void |
268b6b39 AM |
438 | elf_swap_reloc_out (bfd *abfd, |
439 | const Elf_Internal_Rela *src, | |
440 | bfd_byte *d) | |
252b5132 | 441 | { |
947216bf | 442 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
443 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
444 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
445 | } |
446 | ||
947216bf | 447 | void |
268b6b39 AM |
448 | elf_swap_reloca_out (bfd *abfd, |
449 | const Elf_Internal_Rela *src, | |
450 | bfd_byte *d) | |
252b5132 | 451 | { |
947216bf | 452 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
453 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
454 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
455 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
456 | } |
457 | ||
268b6b39 AM |
458 | void |
459 | elf_swap_dyn_in (bfd *abfd, | |
460 | const void *p, | |
461 | Elf_Internal_Dyn *dst) | |
252b5132 | 462 | { |
a50b1753 | 463 | const Elf_External_Dyn *src = (const Elf_External_Dyn *) p; |
252b5132 | 464 | |
dc810e39 AM |
465 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
466 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
467 | } |
468 | ||
268b6b39 AM |
469 | void |
470 | elf_swap_dyn_out (bfd *abfd, | |
471 | const Elf_Internal_Dyn *src, | |
472 | void *p) | |
252b5132 | 473 | { |
a50b1753 | 474 | Elf_External_Dyn *dst = (Elf_External_Dyn *) p; |
c7ac6ff8 | 475 | |
dc810e39 AM |
476 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
477 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
478 | } |
479 | \f | |
480 | /* ELF .o/exec file reading */ | |
481 | ||
252b5132 RH |
482 | /* Begin processing a given object. |
483 | ||
484 | First we validate the file by reading in the ELF header and checking | |
485 | the magic number. */ | |
486 | ||
0a1b45a2 | 487 | static inline bool |
268b6b39 | 488 | elf_file_p (Elf_External_Ehdr *x_ehdrp) |
252b5132 RH |
489 | { |
490 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
491 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
492 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
493 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
494 | } | |
495 | ||
496 | /* Check to see if the file associated with ABFD matches the target vector | |
497 | that ABFD points to. | |
498 | ||
499 | Note that we may be called several times with the same ABFD, but different | |
500 | target vectors, most of which will not match. We have to avoid leaving | |
501 | any side effects in ABFD, or any data it points to (like tdata), if the | |
502 | file does not match the target vector. */ | |
503 | ||
cb001c0d | 504 | bfd_cleanup |
268b6b39 | 505 | elf_object_p (bfd *abfd) |
252b5132 RH |
506 | { |
507 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
508 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
509 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 510 | Elf_Internal_Shdr i_shdr; |
ed591155 | 511 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 512 | unsigned int shindex; |
9c5bfbb7 | 513 | const struct elf_backend_data *ebd; |
252b5132 | 514 | asection *s; |
d1036acb | 515 | const bfd_target *target; |
252b5132 RH |
516 | |
517 | /* Read in the ELF header in external format. */ | |
518 | ||
268b6b39 | 519 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
520 | { |
521 | if (bfd_get_error () != bfd_error_system_call) | |
522 | goto got_wrong_format_error; | |
523 | else | |
524 | goto got_no_match; | |
525 | } | |
526 | ||
527 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
528 | make use of. The magic number must match, the address size ('class') | |
529 | and byte-swapping must match our XVEC entry, and it must have a | |
530 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 531 | file). */ |
252b5132 | 532 | |
82e51918 AM |
533 | if (! elf_file_p (&x_ehdr) |
534 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
535 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
536 | goto got_wrong_format_error; |
537 | ||
538 | /* Check that file's byte order matches xvec's */ | |
539 | switch (x_ehdr.e_ident[EI_DATA]) | |
540 | { | |
541 | case ELFDATA2MSB: /* Big-endian */ | |
542 | if (! bfd_header_big_endian (abfd)) | |
543 | goto got_wrong_format_error; | |
544 | break; | |
545 | case ELFDATA2LSB: /* Little-endian */ | |
546 | if (! bfd_header_little_endian (abfd)) | |
547 | goto got_wrong_format_error; | |
548 | break; | |
549 | case ELFDATANONE: /* No data encoding specified */ | |
550 | default: /* Unknown data encoding specified */ | |
551 | goto got_wrong_format_error; | |
552 | } | |
553 | ||
d1036acb L |
554 | target = abfd->xvec; |
555 | ||
252b5132 RH |
556 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
557 | the tdata pointer in the bfd. */ | |
558 | ||
d1036acb | 559 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 560 | goto got_no_match; |
e84d6fca | 561 | |
252b5132 RH |
562 | /* Now that we know the byte order, swap in the rest of the header */ |
563 | i_ehdrp = elf_elfheader (abfd); | |
564 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
565 | #if DEBUG & 1 | |
566 | elf_debug_file (i_ehdrp); | |
567 | #endif | |
568 | ||
569 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
570 | if (i_ehdrp->e_type == ET_CORE) | |
571 | goto got_wrong_format_error; | |
572 | ||
0c35f01a AM |
573 | /* If this is a relocatable file and there is no section header |
574 | table, then we're hosed. */ | |
8642dafa | 575 | if (i_ehdrp->e_shoff < sizeof (x_ehdr) && i_ehdrp->e_type == ET_REL) |
252b5132 RH |
576 | goto got_wrong_format_error; |
577 | ||
e460dd0d | 578 | /* As a simple sanity check, verify that what BFD thinks is the |
252b5132 | 579 | size of each section header table entry actually matches the size |
0c35f01a AM |
580 | recorded in the file, but only if there are any sections. */ |
581 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
582 | goto got_wrong_format_error; |
583 | ||
7ece0d85 | 584 | /* Further sanity check. */ |
8642dafa | 585 | if (i_ehdrp->e_shoff < sizeof (x_ehdr) && i_ehdrp->e_shnum != 0) |
7ece0d85 JJ |
586 | goto got_wrong_format_error; |
587 | ||
252b5132 | 588 | ebd = get_elf_backend_data (abfd); |
11a7ae4f AM |
589 | if (ebd->s->arch_size != ARCH_SIZE) |
590 | goto got_wrong_format_error; | |
252b5132 RH |
591 | |
592 | /* Check that the ELF e_machine field matches what this particular | |
593 | BFD format expects. */ | |
594 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
595 | && (ebd->elf_machine_alt1 == 0 |
596 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
597 | && (ebd->elf_machine_alt2 == 0 | |
0aabe54e AM |
598 | || i_ehdrp->e_machine != ebd->elf_machine_alt2) |
599 | && ebd->elf_machine_code != EM_NONE) | |
600 | goto got_wrong_format_error; | |
252b5132 RH |
601 | |
602 | if (i_ehdrp->e_type == ET_EXEC) | |
603 | abfd->flags |= EXEC_P; | |
604 | else if (i_ehdrp->e_type == ET_DYN) | |
605 | abfd->flags |= DYNAMIC; | |
606 | ||
607 | if (i_ehdrp->e_phnum > 0) | |
608 | abfd->flags |= D_PAGED; | |
609 | ||
610 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
611 | { | |
612 | /* It's OK if this fails for the generic target. */ | |
613 | if (ebd->elf_machine_code != EM_NONE) | |
614 | goto got_no_match; | |
615 | } | |
616 | ||
d1036acb | 617 | if (ebd->elf_machine_code != EM_NONE |
0aabe54e AM |
618 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi |
619 | && ebd->elf_osabi != ELFOSABI_NONE) | |
620 | goto got_wrong_format_error; | |
d1036acb | 621 | |
8642dafa | 622 | if (i_ehdrp->e_shoff >= sizeof (x_ehdr)) |
7ece0d85 | 623 | { |
b32a5c16 | 624 | file_ptr where = (file_ptr) i_ehdrp->e_shoff; |
0560d0f7 | 625 | |
7ece0d85 | 626 | /* Seek to the section header table in the file. */ |
b32a5c16 | 627 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
7ece0d85 | 628 | goto got_no_match; |
5732c114 | 629 | |
7ece0d85 JJ |
630 | /* Read the first section header at index 0, and convert to internal |
631 | form. */ | |
268b6b39 | 632 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
633 | goto got_no_match; |
634 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 635 | |
7ece0d85 JJ |
636 | /* If the section count is zero, the actual count is in the first |
637 | section header. */ | |
638 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
639 | { |
640 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
1c52a645 L |
641 | if (i_ehdrp->e_shnum >= SHN_LORESERVE |
642 | || i_ehdrp->e_shnum != i_shdr.sh_size | |
643 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
644 | goto got_wrong_format_error; |
645 | } | |
5732c114 | 646 | |
7ece0d85 | 647 | /* And similarly for the string table index. */ |
4fbb74a6 | 648 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
649 | { |
650 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
651 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
652 | goto got_wrong_format_error; | |
653 | } | |
654 | ||
ecd12bc1 AM |
655 | /* And program headers. */ |
656 | if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0) | |
657 | { | |
658 | i_ehdrp->e_phnum = i_shdr.sh_info; | |
659 | if (i_ehdrp->e_phnum != i_shdr.sh_info) | |
660 | goto got_wrong_format_error; | |
661 | } | |
662 | ||
0560d0f7 AM |
663 | /* Sanity check that we can read all of the section headers. |
664 | It ought to be good enough to just read the last one. */ | |
665 | if (i_ehdrp->e_shnum != 1) | |
666 | { | |
667 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
668 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
669 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
670 | goto got_wrong_format_error; |
671 | ||
672 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
0560d0f7 AM |
673 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) |
674 | goto got_wrong_format_error; | |
675 | ||
b32a5c16 | 676 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
677 | goto got_no_match; |
678 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
679 | goto got_no_match; | |
680 | ||
681 | /* Back to where we were. */ | |
682 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
b32a5c16 | 683 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
684 | goto got_no_match; |
685 | } | |
7ece0d85 | 686 | } |
5732c114 | 687 | |
252b5132 | 688 | /* Allocate space for a copy of the section header table in |
5732c114 | 689 | internal form. */ |
0c35f01a AM |
690 | if (i_ehdrp->e_shnum != 0) |
691 | { | |
5732c114 | 692 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 693 | unsigned int num_sec; |
1f4361a7 | 694 | size_t amt; |
5732c114 | 695 | |
1f4361a7 | 696 | if (_bfd_mul_overflow (i_ehdrp->e_shnum, sizeof (*i_shdrp), &amt)) |
c20f6f63 | 697 | goto got_wrong_format_error; |
1f4361a7 | 698 | i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt); |
5732c114 AM |
699 | if (!i_shdrp) |
700 | goto got_no_match; | |
9ad5cbcf | 701 | num_sec = i_ehdrp->e_shnum; |
9ad5cbcf | 702 | elf_numsections (abfd) = num_sec; |
1f4361a7 AM |
703 | if (_bfd_mul_overflow (num_sec, sizeof (i_shdrp), &amt)) |
704 | goto got_wrong_format_error; | |
705 | elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt); | |
5732c114 | 706 | if (!elf_elfsections (abfd)) |
0c35f01a | 707 | goto got_no_match; |
a86c6c19 AM |
708 | elf_tdata (abfd)->being_created = bfd_zalloc (abfd, num_sec); |
709 | if (!elf_tdata (abfd)->being_created) | |
710 | goto got_no_match; | |
5732c114 AM |
711 | |
712 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
4fbb74a6 | 713 | for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++) |
5732c114 | 714 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 715 | |
ed591155 AM |
716 | /* Read in the rest of the section header table and convert it |
717 | to internal form. */ | |
718 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
719 | { | |
268b6b39 | 720 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
721 | goto got_no_match; |
722 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
723 | ||
24639c7d | 724 | /* Sanity check sh_link and sh_info. */ |
4fbb74a6 | 725 | if (i_shdrp[shindex].sh_link >= num_sec) |
cfcac11d | 726 | { |
caa83f8b | 727 | /* PR 10478: Accept Solaris binaries with a sh_link |
cfcac11d NC |
728 | field set to SHN_BEFORE or SHN_AFTER. */ |
729 | switch (ebd->elf_machine_code) | |
730 | { | |
caa83f8b | 731 | case EM_386: |
22abe556 | 732 | case EM_IAMCU: |
caa83f8b | 733 | case EM_X86_64: |
cfcac11d NC |
734 | case EM_OLD_SPARCV9: |
735 | case EM_SPARC32PLUS: | |
736 | case EM_SPARCV9: | |
737 | case EM_SPARC: | |
738 | if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */ | |
739 | || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */) | |
740 | break; | |
741 | /* Otherwise fall through. */ | |
742 | default: | |
743 | goto got_wrong_format_error; | |
744 | } | |
745 | } | |
24639c7d JJ |
746 | |
747 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
748 | || i_shdrp[shindex].sh_type == SHT_RELA | |
749 | || i_shdrp[shindex].sh_type == SHT_REL) | |
4fbb74a6 | 750 | && i_shdrp[shindex].sh_info >= num_sec) |
24639c7d JJ |
751 | goto got_wrong_format_error; |
752 | ||
ed591155 AM |
753 | /* If the section is loaded, but not page aligned, clear |
754 | D_PAGED. */ | |
755 | if (i_shdrp[shindex].sh_size != 0 | |
756 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
757 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
758 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 759 | % ebd->minpagesize) |
ed591155 AM |
760 | != 0)) |
761 | abfd->flags &= ~D_PAGED; | |
762 | } | |
ed591155 | 763 | |
890f750a AM |
764 | if (i_ehdrp->e_shstrndx >= elf_numsections (abfd) |
765 | || i_shdrp[i_ehdrp->e_shstrndx].sh_type != SHT_STRTAB) | |
0b49d371 NC |
766 | { |
767 | /* PR 2257: | |
768 | We used to just goto got_wrong_format_error here | |
769 | but there are binaries in existance for which this test | |
770 | will prevent the binutils from working with them at all. | |
771 | So we are kind, and reset the string index value to 0 | |
772 | so that at least some processing can be done. */ | |
773 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
75e100a3 | 774 | abfd->read_only = 1; |
dae82561 | 775 | _bfd_error_handler |
871b3ab2 | 776 | (_("warning: %pB has a corrupt string table index - ignoring"), |
dae82561 | 777 | abfd); |
0b49d371 | 778 | } |
24639c7d | 779 | } |
0b49d371 | 780 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
781 | goto got_wrong_format_error; |
782 | ||
252b5132 RH |
783 | /* Read in the program headers. */ |
784 | if (i_ehdrp->e_phnum == 0) | |
785 | elf_tdata (abfd)->phdr = NULL; | |
786 | else | |
787 | { | |
788 | Elf_Internal_Phdr *i_phdr; | |
789 | unsigned int i; | |
7c5fa58e | 790 | ufile_ptr filesize; |
1f4361a7 | 791 | size_t amt; |
252b5132 | 792 | |
5f60af5d NC |
793 | /* Check for a corrupt input file with an impossibly large number |
794 | of program headers. */ | |
7c5fa58e AM |
795 | filesize = bfd_get_file_size (abfd); |
796 | if (filesize != 0 | |
797 | && i_ehdrp->e_phnum > filesize / sizeof (Elf_External_Phdr)) | |
798 | goto got_wrong_format_error; | |
1f4361a7 AM |
799 | if (_bfd_mul_overflow (i_ehdrp->e_phnum, sizeof (*i_phdr), &amt)) |
800 | goto got_wrong_format_error; | |
7a6e0d89 | 801 | elf_tdata (abfd)->phdr |
1f4361a7 | 802 | = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt); |
252b5132 RH |
803 | if (elf_tdata (abfd)->phdr == NULL) |
804 | goto got_no_match; | |
dc810e39 | 805 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
806 | goto got_no_match; |
807 | i_phdr = elf_tdata (abfd)->phdr; | |
808 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
809 | { | |
810 | Elf_External_Phdr x_phdr; | |
811 | ||
268b6b39 | 812 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
813 | goto got_no_match; |
814 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
75e100a3 AM |
815 | /* Too much code in BFD relies on alignment being a power of |
816 | two, as required by the ELF spec. */ | |
817 | if (i_phdr->p_align != (i_phdr->p_align & -i_phdr->p_align)) | |
818 | { | |
819 | abfd->read_only = 1; | |
820 | _bfd_error_handler (_("warning: %pB has a program header " | |
821 | "with invalid alignment"), abfd); | |
822 | } | |
252b5132 RH |
823 | } |
824 | } | |
825 | ||
8642dafa | 826 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff >= sizeof (x_ehdr)) |
252b5132 | 827 | { |
9ad5cbcf AM |
828 | unsigned int num_sec; |
829 | ||
0c35f01a AM |
830 | /* Once all of the section headers have been read and converted, we |
831 | can start processing them. Note that the first section header is | |
832 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
833 | num_sec = elf_numsections (abfd); |
834 | for (shindex = 1; shindex < num_sec; shindex++) | |
4fbb74a6 AM |
835 | if (!bfd_section_from_shdr (abfd, shindex)) |
836 | goto got_no_match; | |
3d7f7666 | 837 | |
dd863624 L |
838 | /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */ |
839 | if (! _bfd_elf_setup_sections (abfd)) | |
3d7f7666 | 840 | goto got_wrong_format_error; |
252b5132 RH |
841 | } |
842 | ||
843 | /* Let the backend double check the format and override global | |
844 | information. */ | |
845 | if (ebd->elf_backend_object_p) | |
846 | { | |
82e51918 | 847 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
848 | goto got_wrong_format_error; |
849 | } | |
850 | ||
a14199db AM |
851 | /* Remember the entry point specified in the ELF file header. */ |
852 | bfd_set_start_address (abfd, i_ehdrp->e_entry); | |
853 | ||
252b5132 RH |
854 | /* If we have created any reloc sections that are associated with |
855 | debugging sections, mark the reloc sections as debugging as well. */ | |
856 | for (s = abfd->sections; s != NULL; s = s->next) | |
857 | { | |
858 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
859 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
860 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
861 | { | |
862 | unsigned long targ_index; | |
863 | asection *targ_sec; | |
864 | ||
865 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
866 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
867 | if (targ_sec != NULL | |
868 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
869 | s->flags |= SEC_DEBUGGING; | |
870 | } | |
871 | } | |
cb001c0d | 872 | return _bfd_no_cleanup; |
252b5132 RH |
873 | |
874 | got_wrong_format_error: | |
875 | bfd_set_error (bfd_error_wrong_format); | |
ed591155 | 876 | |
252b5132 | 877 | got_no_match: |
ed591155 | 878 | return NULL; |
252b5132 RH |
879 | } |
880 | \f | |
881 | /* ELF .o/exec file writing */ | |
882 | ||
883 | /* Write out the relocs. */ | |
884 | ||
b9f66672 | 885 | void |
268b6b39 | 886 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 887 | { |
a8e14f4c | 888 | const struct elf_backend_data * const bed = get_elf_backend_data (abfd); |
0a1b45a2 | 889 | bool *failedp = (bool *) data; |
252b5132 | 890 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 891 | bfd_vma addr_offset; |
c39a58e6 | 892 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
893 | size_t extsize; |
894 | bfd_byte *dst_rela; | |
252b5132 | 895 | unsigned int idx; |
947216bf AM |
896 | asymbol *last_sym; |
897 | int last_sym_idx; | |
1f4361a7 | 898 | size_t amt; |
252b5132 RH |
899 | |
900 | /* If we have already failed, don't do anything. */ | |
901 | if (*failedp) | |
902 | return; | |
903 | ||
904 | if ((sec->flags & SEC_RELOC) == 0) | |
905 | return; | |
906 | ||
907 | /* The linker backend writes the relocs out itself, and sets the | |
908 | reloc_count field to zero to inhibit writing them here. Also, | |
909 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
910 | relocs. */ | |
911 | if (sec->reloc_count == 0) | |
912 | return; | |
913 | ||
9a44bbd9 DJ |
914 | /* If we have opened an existing file for update, reloc_count may be |
915 | set even though we are not linking. In that case we have nothing | |
916 | to do. */ | |
917 | if (sec->orelocation == NULL) | |
918 | return; | |
919 | ||
d4730f92 BS |
920 | rela_hdr = elf_section_data (sec)->rela.hdr; |
921 | if (rela_hdr == NULL) | |
922 | rela_hdr = elf_section_data (sec)->rel.hdr; | |
252b5132 RH |
923 | |
924 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
1f4361a7 AM |
925 | if (_bfd_mul_overflow (sec->reloc_count, rela_hdr->sh_entsize, &amt) |
926 | || (rela_hdr->contents = bfd_alloc (abfd, amt)) == NULL) | |
252b5132 | 927 | { |
1f4361a7 | 928 | bfd_set_error (bfd_error_no_memory); |
0a1b45a2 | 929 | *failedp = true; |
252b5132 RH |
930 | return; |
931 | } | |
932 | ||
bf572ba0 MM |
933 | /* Figure out whether the relocations are RELA or REL relocations. */ |
934 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
935 | { |
936 | swap_out = elf_swap_reloca_out; | |
937 | extsize = sizeof (Elf_External_Rela); | |
938 | } | |
bf572ba0 | 939 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
940 | { |
941 | swap_out = elf_swap_reloc_out; | |
942 | extsize = sizeof (Elf_External_Rel); | |
943 | } | |
bf572ba0 MM |
944 | else |
945 | /* Every relocation section should be either an SHT_RELA or an | |
946 | SHT_REL section. */ | |
947 | abort (); | |
948 | ||
947216bf AM |
949 | /* The address of an ELF reloc is section relative for an object |
950 | file, and absolute for an executable file or shared library. | |
951 | The address of a BFD reloc is always section relative. */ | |
952 | addr_offset = 0; | |
953 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
954 | addr_offset = sec->vma; | |
955 | ||
3e932841 | 956 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
957 | last_sym = 0; |
958 | last_sym_idx = 0; | |
959 | dst_rela = rela_hdr->contents; | |
252b5132 | 960 | |
947216bf AM |
961 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
962 | { | |
963 | Elf_Internal_Rela src_rela; | |
964 | arelent *ptr; | |
965 | asymbol *sym; | |
966 | int n; | |
967 | ||
968 | ptr = sec->orelocation[idx]; | |
969 | sym = *ptr->sym_ptr_ptr; | |
970 | if (sym == last_sym) | |
971 | n = last_sym_idx; | |
972 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
973 | n = STN_UNDEF; | |
974 | else | |
252b5132 | 975 | { |
947216bf AM |
976 | last_sym = sym; |
977 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
978 | if (n < 0) | |
252b5132 | 979 | { |
0a1b45a2 | 980 | *failedp = true; |
252b5132 RH |
981 | return; |
982 | } | |
947216bf | 983 | last_sym_idx = n; |
252b5132 | 984 | } |
252b5132 | 985 | |
947216bf AM |
986 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
987 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
988 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 989 | { |
0a1b45a2 | 990 | *failedp = true; |
947216bf | 991 | return; |
252b5132 | 992 | } |
947216bf | 993 | |
2d054e6b NC |
994 | if (ptr->howto == NULL) |
995 | { | |
0a1b45a2 | 996 | *failedp = true; |
2d054e6b NC |
997 | return; |
998 | } | |
999 | ||
947216bf AM |
1000 | src_rela.r_offset = ptr->address + addr_offset; |
1001 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
1002 | src_rela.r_addend = ptr->addend; | |
1003 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 | 1004 | } |
a8e14f4c | 1005 | |
44466e45 NC |
1006 | if (elf_section_data (sec)->has_secondary_relocs |
1007 | && !bed->write_secondary_relocs (abfd, sec)) | |
a859124d | 1008 | { |
0a1b45a2 | 1009 | *failedp = true; |
a859124d AM |
1010 | return; |
1011 | } | |
252b5132 RH |
1012 | } |
1013 | ||
1014 | /* Write out the program headers. */ | |
1015 | ||
1016 | int | |
268b6b39 AM |
1017 | elf_write_out_phdrs (bfd *abfd, |
1018 | const Elf_Internal_Phdr *phdr, | |
1019 | unsigned int count) | |
252b5132 RH |
1020 | { |
1021 | while (count--) | |
1022 | { | |
1023 | Elf_External_Phdr extphdr; | |
1a9ccd70 | 1024 | |
252b5132 | 1025 | elf_swap_phdr_out (abfd, phdr, &extphdr); |
268b6b39 AM |
1026 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1027 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1028 | return -1; |
1029 | phdr++; | |
1030 | } | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /* Write out the section headers and the ELF file header. */ | |
1035 | ||
0a1b45a2 | 1036 | bool |
268b6b39 | 1037 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1038 | { |
1039 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1040 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1041 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1042 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1043 | unsigned int count; | |
1f4361a7 | 1044 | size_t amt; |
252b5132 RH |
1045 | |
1046 | i_ehdrp = elf_elfheader (abfd); | |
1047 | i_shdrp = elf_elfsections (abfd); | |
1048 | ||
3e932841 | 1049 | /* swap the header before spitting it out... */ |
252b5132 RH |
1050 | |
1051 | #if DEBUG & 1 | |
1052 | elf_debug_file (i_ehdrp); | |
1053 | #endif | |
1054 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1055 | amt = sizeof (x_ehdr); |
252b5132 | 1056 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1057 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
0a1b45a2 | 1058 | return false; |
252b5132 | 1059 | |
5732c114 AM |
1060 | /* Some fields in the first section header handle overflow of ehdr |
1061 | fields. */ | |
ecd12bc1 AM |
1062 | if (i_ehdrp->e_phnum >= PN_XNUM) |
1063 | i_shdrp[0]->sh_info = i_ehdrp->e_phnum; | |
4fbb74a6 | 1064 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1065 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1066 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1067 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1068 | ||
3e932841 | 1069 | /* at this point we've concocted all the ELF sections... */ |
1f4361a7 AM |
1070 | if (_bfd_mul_overflow (i_ehdrp->e_shnum, sizeof (*x_shdrp), &amt)) |
1071 | { | |
1072 | bfd_set_error (bfd_error_no_memory); | |
0a1b45a2 | 1073 | return false; |
1f4361a7 AM |
1074 | } |
1075 | x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt); | |
252b5132 | 1076 | if (!x_shdrp) |
0a1b45a2 | 1077 | return false; |
252b5132 | 1078 | |
5732c114 | 1079 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
1080 | { |
1081 | #if DEBUG & 2 | |
5732c114 | 1082 | elf_debug_section (count, *i_shdrp); |
252b5132 | 1083 | #endif |
5732c114 | 1084 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
252b5132 | 1085 | } |
7a6e0d89 | 1086 | amt = (bfd_size_type) i_ehdrp->e_shnum * sizeof (*x_shdrp); |
252b5132 | 1087 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
268b6b39 | 1088 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
0a1b45a2 | 1089 | return false; |
252b5132 | 1090 | |
3e932841 | 1091 | /* need to dump the string table too... */ |
252b5132 | 1092 | |
0a1b45a2 | 1093 | return true; |
252b5132 RH |
1094 | } |
1095 | ||
0a1b45a2 | 1096 | bool |
d94838b1 RM |
1097 | elf_checksum_contents (bfd *abfd, |
1098 | void (*process) (const void *, size_t, void *), | |
1099 | void *arg) | |
1100 | { | |
1101 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1102 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1103 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1104 | unsigned int count, num; | |
1105 | ||
1106 | { | |
1107 | Elf_External_Ehdr x_ehdr; | |
1108 | Elf_Internal_Ehdr i_ehdr; | |
1109 | ||
1110 | i_ehdr = *i_ehdrp; | |
1111 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1112 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1113 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1114 | } | |
1115 | ||
1116 | num = i_ehdrp->e_phnum; | |
1117 | for (count = 0; count < num; count++) | |
1118 | { | |
1119 | Elf_External_Phdr x_phdr; | |
1120 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1121 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1122 | } | |
1123 | ||
1124 | num = elf_numsections (abfd); | |
1125 | for (count = 0; count < num; count++) | |
1126 | { | |
1127 | Elf_Internal_Shdr i_shdr; | |
1128 | Elf_External_Shdr x_shdr; | |
9f7c3e5e | 1129 | bfd_byte *contents, *free_contents; |
d94838b1 RM |
1130 | |
1131 | i_shdr = *i_shdrp[count]; | |
1132 | i_shdr.sh_offset = 0; | |
1133 | ||
1134 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1135 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1136 | ||
9f7c3e5e AM |
1137 | /* Process the section's contents, if it has some. |
1138 | PR ld/12451: Read them in if necessary. */ | |
1139 | if (i_shdr.sh_type == SHT_NOBITS) | |
1140 | continue; | |
1141 | free_contents = NULL; | |
1142 | contents = i_shdr.contents; | |
1143 | if (contents == NULL) | |
4d48ecf3 NC |
1144 | { |
1145 | asection *sec; | |
1146 | ||
1147 | sec = bfd_section_from_elf_index (abfd, count); | |
1148 | if (sec != NULL) | |
1149 | { | |
9f7c3e5e AM |
1150 | contents = sec->contents; |
1151 | if (contents == NULL) | |
4d48ecf3 NC |
1152 | { |
1153 | /* Force rereading from file. */ | |
1154 | sec->flags &= ~SEC_IN_MEMORY; | |
9f7c3e5e | 1155 | if (!bfd_malloc_and_get_section (abfd, sec, &free_contents)) |
4d48ecf3 | 1156 | continue; |
9f7c3e5e | 1157 | contents = free_contents; |
4d48ecf3 | 1158 | } |
4d48ecf3 NC |
1159 | } |
1160 | } | |
9f7c3e5e AM |
1161 | if (contents != NULL) |
1162 | { | |
1163 | (*process) (contents, i_shdr.sh_size, arg); | |
c9594989 | 1164 | free (free_contents); |
9f7c3e5e | 1165 | } |
d94838b1 RM |
1166 | } |
1167 | ||
0a1b45a2 | 1168 | return true; |
d94838b1 RM |
1169 | } |
1170 | ||
252b5132 | 1171 | long |
0a1b45a2 | 1172 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bool dynamic) |
252b5132 RH |
1173 | { |
1174 | Elf_Internal_Shdr *hdr; | |
1175 | Elf_Internal_Shdr *verhdr; | |
1176 | unsigned long symcount; /* Number of external ELF symbols */ | |
1177 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1178 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1179 | Elf_Internal_Sym *isym; |
1180 | Elf_Internal_Sym *isymend; | |
1181 | Elf_Internal_Sym *isymbuf = NULL; | |
1182 | Elf_External_Versym *xver; | |
1183 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1184 | const struct elf_backend_data *ebd; |
1f4361a7 | 1185 | size_t amt; |
252b5132 RH |
1186 | |
1187 | /* Read each raw ELF symbol, converting from external ELF form to | |
1188 | internal ELF form, and then using the information to create a | |
1189 | canonical bfd symbol table entry. | |
1190 | ||
1191 | Note that we allocate the initial bfd canonical symbol buffer | |
1192 | based on a one-to-one mapping of the ELF symbols to canonical | |
1193 | symbols. We actually use all the ELF symbols, so there will be no | |
1194 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1195 | build the caller's pointer vector. */ |
252b5132 RH |
1196 | |
1197 | if (! dynamic) | |
1198 | { | |
1199 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1200 | verhdr = NULL; | |
1201 | } | |
1202 | else | |
1203 | { | |
1204 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1205 | if (elf_dynversym (abfd) == 0) | |
1206 | verhdr = NULL; | |
1207 | else | |
1208 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
12bd6957 | 1209 | if ((elf_dynverdef (abfd) != 0 |
252b5132 | 1210 | && elf_tdata (abfd)->verdef == NULL) |
12bd6957 | 1211 | || (elf_dynverref (abfd) != 0 |
252b5132 RH |
1212 | && elf_tdata (abfd)->verref == NULL)) |
1213 | { | |
0a1b45a2 | 1214 | if (!_bfd_elf_slurp_version_tables (abfd, false)) |
252b5132 RH |
1215 | return -1; |
1216 | } | |
1217 | } | |
1218 | ||
6cdc0ccc | 1219 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1220 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1221 | if (symcount == 0) |
1222 | sym = symbase = NULL; | |
1223 | else | |
1224 | { | |
6cdc0ccc AM |
1225 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1226 | NULL, NULL, NULL); | |
1227 | if (isymbuf == NULL) | |
1228 | return -1; | |
252b5132 | 1229 | |
1f4361a7 AM |
1230 | if (_bfd_mul_overflow (symcount, sizeof (elf_symbol_type), &amt)) |
1231 | { | |
1232 | bfd_set_error (bfd_error_file_too_big); | |
1233 | goto error_return; | |
1234 | } | |
1235 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt); | |
252b5132 | 1236 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1237 | goto error_return; |
252b5132 RH |
1238 | |
1239 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1240 | if (verhdr != NULL |
1241 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1242 | { | |
4eca0228 | 1243 | _bfd_error_handler |
695344c0 | 1244 | /* xgettext:c-format */ |
2dcf00ce AM |
1245 | (_("%pB: version count (%" PRId64 ")" |
1246 | " does not match symbol count (%ld)"), | |
dae82561 | 1247 | abfd, |
2dcf00ce | 1248 | (int64_t) (verhdr->sh_size / sizeof (Elf_External_Versym)), |
252b5132 RH |
1249 | symcount); |
1250 | ||
1251 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1252 | since that is more helpful than just quitting. */ |
252b5132 RH |
1253 | verhdr = NULL; |
1254 | } | |
1255 | ||
1256 | if (verhdr != NULL) | |
1257 | { | |
1258 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1259 | goto error_return; | |
2bb3687b AM |
1260 | xverbuf = (Elf_External_Versym *) |
1261 | _bfd_malloc_and_read (abfd, verhdr->sh_size, verhdr->sh_size); | |
6cdc0ccc | 1262 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 | 1263 | goto error_return; |
252b5132 RH |
1264 | } |
1265 | ||
1266 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1267 | xver = xverbuf; |
1268 | if (xver != NULL) | |
1269 | ++xver; | |
1270 | isymend = isymbuf + symcount; | |
1271 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1272 | { |
6cdc0ccc | 1273 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 | 1274 | |
896ca098 | 1275 | sym->symbol.the_bfd = abfd; |
26c61ae5 | 1276 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
6cdc0ccc | 1277 | sym->symbol.value = isym->st_value; |
252b5132 | 1278 | |
6cdc0ccc | 1279 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1280 | { |
1281 | sym->symbol.section = bfd_und_section_ptr; | |
1282 | } | |
6cdc0ccc | 1283 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1284 | { |
1285 | sym->symbol.section = bfd_abs_section_ptr; | |
1286 | } | |
6cdc0ccc | 1287 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1288 | { |
1289 | sym->symbol.section = bfd_com_section_ptr; | |
02d00247 AM |
1290 | if ((abfd->flags & BFD_PLUGIN) != 0) |
1291 | { | |
1292 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
1293 | ||
1294 | if (xc == NULL) | |
1295 | { | |
1296 | flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
1297 | | SEC_EXCLUDE); | |
1298 | xc = bfd_make_section_with_flags (abfd, "COMMON", flags); | |
1299 | if (xc == NULL) | |
1300 | goto error_return; | |
1301 | } | |
1302 | sym->symbol.section = xc; | |
1303 | } | |
252b5132 RH |
1304 | /* Elf puts the alignment into the `value' field, and |
1305 | the size into the `size' field. BFD wants to see the | |
1306 | size in the value field, and doesn't care (at the | |
1307 | moment) about the alignment. */ | |
6cdc0ccc | 1308 | sym->symbol.value = isym->st_size; |
252b5132 | 1309 | } |
252b5132 | 1310 | else |
cb33740c AM |
1311 | { |
1312 | sym->symbol.section | |
1313 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1314 | if (sym->symbol.section == NULL) | |
1315 | { | |
1316 | /* This symbol is in a section for which we did not | |
1317 | create a BFD section. Just use bfd_abs_section, | |
a8e14f4c NC |
1318 | although it is wrong. FIXME. Note - there is |
1319 | code in elf.c:swap_out_syms that calls | |
1320 | symbol_section_index() in the elf backend for | |
1321 | cases like this. */ | |
cb33740c AM |
1322 | sym->symbol.section = bfd_abs_section_ptr; |
1323 | } | |
1324 | } | |
252b5132 | 1325 | |
1049f94e | 1326 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1327 | already section relative. */ |
252b5132 RH |
1328 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1329 | sym->symbol.value -= sym->symbol.section->vma; | |
1330 | ||
6cdc0ccc | 1331 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1332 | { |
1333 | case STB_LOCAL: | |
1334 | sym->symbol.flags |= BSF_LOCAL; | |
1335 | break; | |
1336 | case STB_GLOBAL: | |
6cdc0ccc | 1337 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1338 | sym->symbol.flags |= BSF_GLOBAL; |
1339 | break; | |
1340 | case STB_WEAK: | |
1341 | sym->symbol.flags |= BSF_WEAK; | |
1342 | break; | |
3e7a7d11 NC |
1343 | case STB_GNU_UNIQUE: |
1344 | sym->symbol.flags |= BSF_GNU_UNIQUE; | |
1345 | break; | |
252b5132 RH |
1346 | } |
1347 | ||
6cdc0ccc | 1348 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1349 | { |
1350 | case STT_SECTION: | |
d1bcae83 L |
1351 | /* Mark the input section symbol as used since it may be |
1352 | used for relocation and section group. | |
1353 | NB: BSF_SECTION_SYM_USED is ignored by linker and may | |
1354 | be cleared by objcopy for non-relocatable inputs. */ | |
1355 | sym->symbol.flags |= (BSF_SECTION_SYM | |
1356 | | BSF_DEBUGGING | |
1357 | | BSF_SECTION_SYM_USED); | |
252b5132 RH |
1358 | break; |
1359 | case STT_FILE: | |
1360 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1361 | break; | |
1362 | case STT_FUNC: | |
1363 | sym->symbol.flags |= BSF_FUNCTION; | |
1364 | break; | |
504b7d20 NC |
1365 | case STT_COMMON: |
1366 | /* FIXME: Do we have to put the size field into the value field | |
1367 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
b8871f35 | 1368 | sym->symbol.flags |= BSF_ELF_COMMON; |
504b7d20 | 1369 | /* Fall through. */ |
252b5132 RH |
1370 | case STT_OBJECT: |
1371 | sym->symbol.flags |= BSF_OBJECT; | |
1372 | break; | |
0be9069d L |
1373 | case STT_TLS: |
1374 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1375 | break; | |
d9352518 DB |
1376 | case STT_RELC: |
1377 | sym->symbol.flags |= BSF_RELC; | |
1378 | break; | |
1379 | case STT_SRELC: | |
1380 | sym->symbol.flags |= BSF_SRELC; | |
1381 | break; | |
d8045f23 NC |
1382 | case STT_GNU_IFUNC: |
1383 | sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION; | |
1384 | break; | |
252b5132 RH |
1385 | } |
1386 | ||
1387 | if (dynamic) | |
1388 | sym->symbol.flags |= BSF_DYNAMIC; | |
1389 | ||
6cdc0ccc | 1390 | if (xver != NULL) |
252b5132 RH |
1391 | { |
1392 | Elf_Internal_Versym iversym; | |
1393 | ||
6cdc0ccc | 1394 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1395 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1396 | xver++; |
252b5132 RH |
1397 | } |
1398 | ||
1399 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1400 | if (ebd->elf_backend_symbol_processing) |
1401 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1402 | } |
1403 | } | |
1404 | ||
1405 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1406 | if (ebd->elf_backend_symbol_table_processing) |
1407 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1408 | |
1409 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1410 | ||
1411 | symcount = sym - symbase; | |
1412 | ||
1413 | /* Fill in the user's symbol pointer vector if needed. */ | |
1414 | if (symptrs) | |
1415 | { | |
1416 | long l = symcount; | |
1417 | ||
1418 | sym = symbase; | |
1419 | while (l-- > 0) | |
1420 | { | |
1421 | *symptrs++ = &sym->symbol; | |
1422 | sym++; | |
1423 | } | |
1424 | *symptrs = 0; /* Final null pointer */ | |
1425 | } | |
1426 | ||
c9594989 AM |
1427 | free (xverbuf); |
1428 | if (hdr->contents != (unsigned char *) isymbuf) | |
6cdc0ccc | 1429 | free (isymbuf); |
252b5132 | 1430 | return symcount; |
9ad5cbcf | 1431 | |
dc1e8a47 | 1432 | error_return: |
c9594989 AM |
1433 | free (xverbuf); |
1434 | if (hdr->contents != (unsigned char *) isymbuf) | |
6cdc0ccc | 1435 | free (isymbuf); |
252b5132 RH |
1436 | return -1; |
1437 | } | |
1438 | ||
5c799c07 | 1439 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1440 | them. */ |
252b5132 | 1441 | |
0a1b45a2 | 1442 | static bool |
268b6b39 AM |
1443 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1444 | asection *asect, | |
1445 | Elf_Internal_Shdr *rel_hdr, | |
1446 | bfd_size_type reloc_count, | |
1447 | arelent *relents, | |
1448 | asymbol **symbols, | |
0a1b45a2 | 1449 | bool dynamic) |
252b5132 | 1450 | { |
9c5bfbb7 | 1451 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1452 | void *allocated = NULL; |
252b5132 | 1453 | bfd_byte *native_relocs; |
252b5132 RH |
1454 | arelent *relent; |
1455 | unsigned int i; | |
1456 | int entsize; | |
5ad8645c | 1457 | unsigned int symcount; |
252b5132 | 1458 | |
2bb3687b | 1459 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0) |
0a1b45a2 | 1460 | return false; |
2bb3687b | 1461 | allocated = _bfd_malloc_and_read (abfd, rel_hdr->sh_size, rel_hdr->sh_size); |
252b5132 | 1462 | if (allocated == NULL) |
0a1b45a2 | 1463 | return false; |
252b5132 | 1464 | |
a50b1753 | 1465 | native_relocs = (bfd_byte *) allocated; |
252b5132 | 1466 | |
252b5132 RH |
1467 | entsize = rel_hdr->sh_entsize; |
1468 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1469 | || entsize == sizeof (Elf_External_Rela)); | |
1470 | ||
5ad8645c AM |
1471 | if (dynamic) |
1472 | symcount = bfd_get_dynamic_symcount (abfd); | |
1473 | else | |
1474 | symcount = bfd_get_symcount (abfd); | |
1475 | ||
252b5132 RH |
1476 | for (i = 0, relent = relents; |
1477 | i < reloc_count; | |
1478 | i++, relent++, native_relocs += entsize) | |
1479 | { | |
0a1b45a2 | 1480 | bool res; |
252b5132 | 1481 | Elf_Internal_Rela rela; |
252b5132 RH |
1482 | |
1483 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1484 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1485 | else |
947216bf | 1486 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1487 | |
1488 | /* The address of an ELF reloc is section relative for an object | |
1489 | file, and absolute for an executable file or shared library. | |
1490 | The address of a normal BFD reloc is always section relative, | |
1491 | and the address of a dynamic reloc is absolute.. */ | |
1492 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1493 | relent->address = rela.r_offset; | |
1494 | else | |
1495 | relent->address = rela.r_offset - asect->vma; | |
1496 | ||
cf35638d | 1497 | if (ELF_R_SYM (rela.r_info) == STN_UNDEF) |
0ee5a0e4 AM |
1498 | /* FIXME: This and the error case below mean that we have a |
1499 | symbol on relocs that is not elf_symbol_type. */ | |
252b5132 | 1500 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
05a487dc | 1501 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c | 1502 | { |
4eca0228 | 1503 | _bfd_error_handler |
695344c0 | 1504 | /* xgettext:c-format */ |
871b3ab2 | 1505 | (_("%pB(%pA): relocation %d has invalid symbol index %ld"), |
76cfced5 | 1506 | abfd, asect, i, (long) ELF_R_SYM (rela.r_info)); |
f3185997 | 1507 | bfd_set_error (bfd_error_bad_value); |
45dfa85a | 1508 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
1f70368c | 1509 | } |
252b5132 RH |
1510 | else |
1511 | { | |
b48c61bc | 1512 | asymbol **ps; |
28c9d252 | 1513 | |
252b5132 | 1514 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1515 | |
f9cfae62 | 1516 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1517 | } |
1518 | ||
1519 | relent->addend = rela.r_addend; | |
1520 | ||
90fff0d4 DJ |
1521 | if ((entsize == sizeof (Elf_External_Rela) |
1522 | && ebd->elf_info_to_howto != NULL) | |
1523 | || ebd->elf_info_to_howto_rel == NULL) | |
f3185997 | 1524 | res = ebd->elf_info_to_howto (abfd, relent, &rela); |
252b5132 | 1525 | else |
f3185997 NC |
1526 | res = ebd->elf_info_to_howto_rel (abfd, relent, &rela); |
1527 | ||
1528 | if (! res || relent->howto == NULL) | |
1529 | goto error_return; | |
252b5132 RH |
1530 | } |
1531 | ||
c9594989 | 1532 | free (allocated); |
0a1b45a2 | 1533 | return true; |
252b5132 RH |
1534 | |
1535 | error_return: | |
c9594989 | 1536 | free (allocated); |
0a1b45a2 | 1537 | return false; |
252b5132 RH |
1538 | } |
1539 | ||
42fdc509 MM |
1540 | /* Read in and swap the external relocs. */ |
1541 | ||
0a1b45a2 | 1542 | bool |
268b6b39 AM |
1543 | elf_slurp_reloc_table (bfd *abfd, |
1544 | asection *asect, | |
1545 | asymbol **symbols, | |
0a1b45a2 | 1546 | bool dynamic) |
42fdc509 | 1547 | { |
a8e14f4c | 1548 | const struct elf_backend_data * const bed = get_elf_backend_data (abfd); |
42fdc509 MM |
1549 | struct bfd_elf_section_data * const d = elf_section_data (asect); |
1550 | Elf_Internal_Shdr *rel_hdr; | |
1551 | Elf_Internal_Shdr *rel_hdr2; | |
1552 | bfd_size_type reloc_count; | |
1553 | bfd_size_type reloc_count2; | |
1554 | arelent *relents; | |
1f4361a7 | 1555 | size_t amt; |
42fdc509 MM |
1556 | |
1557 | if (asect->relocation != NULL) | |
0a1b45a2 | 1558 | return true; |
42fdc509 MM |
1559 | |
1560 | if (! dynamic) | |
1561 | { | |
1562 | if ((asect->flags & SEC_RELOC) == 0 | |
1563 | || asect->reloc_count == 0) | |
0a1b45a2 | 1564 | return true; |
42fdc509 | 1565 | |
d4730f92 BS |
1566 | rel_hdr = d->rel.hdr; |
1567 | reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0; | |
1568 | rel_hdr2 = d->rela.hdr; | |
1569 | reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0; | |
42fdc509 | 1570 | |
06614111 NC |
1571 | /* PR 17512: file: 0b4f81b7. */ |
1572 | if (asect->reloc_count != reloc_count + reloc_count2) | |
0a1b45a2 | 1573 | return false; |
d4730f92 | 1574 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
42fdc509 MM |
1575 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
1576 | ||
1577 | } | |
1578 | else | |
1579 | { | |
57e21bef MM |
1580 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1581 | case because relocations against this section may use the | |
1582 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1583 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1584 | if (asect->size == 0) |
0a1b45a2 | 1585 | return true; |
42fdc509 MM |
1586 | |
1587 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1588 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1589 | rel_hdr2 = NULL; |
57e21bef | 1590 | reloc_count2 = 0; |
42fdc509 MM |
1591 | } |
1592 | ||
1f4361a7 AM |
1593 | if (_bfd_mul_overflow (reloc_count + reloc_count2, sizeof (arelent), &amt)) |
1594 | { | |
1595 | bfd_set_error (bfd_error_file_too_big); | |
0a1b45a2 | 1596 | return false; |
1f4361a7 AM |
1597 | } |
1598 | relents = (arelent *) bfd_alloc (abfd, amt); | |
42fdc509 | 1599 | if (relents == NULL) |
0a1b45a2 | 1600 | return false; |
42fdc509 | 1601 | |
d4730f92 BS |
1602 | if (rel_hdr |
1603 | && !elf_slurp_reloc_table_from_section (abfd, asect, | |
1604 | rel_hdr, reloc_count, | |
1605 | relents, | |
1606 | symbols, dynamic)) | |
0a1b45a2 | 1607 | return false; |
60bcf0fa NC |
1608 | |
1609 | if (rel_hdr2 | |
42fdc509 MM |
1610 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1611 | rel_hdr2, reloc_count2, | |
1612 | relents + reloc_count, | |
1613 | symbols, dynamic)) | |
0a1b45a2 | 1614 | return false; |
42fdc509 | 1615 | |
f60742b2 | 1616 | if (!bed->slurp_secondary_relocs (abfd, asect, symbols, dynamic)) |
0a1b45a2 | 1617 | return false; |
a8e14f4c | 1618 | |
42fdc509 | 1619 | asect->relocation = relents; |
0a1b45a2 | 1620 | return true; |
42fdc509 MM |
1621 | } |
1622 | ||
e460dd0d | 1623 | #if DEBUG & 2 |
252b5132 | 1624 | static void |
268b6b39 | 1625 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1626 | { |
1627 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1628 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1629 | (long) hdr); | |
1630 | fprintf (stderr, | |
1631 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1632 | (long) hdr->sh_name, | |
1633 | (long) hdr->sh_type, | |
1634 | (long) hdr->sh_flags); | |
1635 | fprintf (stderr, | |
1636 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1637 | (long) hdr->sh_addr, | |
1638 | (long) hdr->sh_offset, | |
1639 | (long) hdr->sh_size); | |
1640 | fprintf (stderr, | |
1641 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1642 | (long) hdr->sh_link, | |
1643 | (long) hdr->sh_info, | |
1644 | (long) hdr->sh_addralign); | |
1645 | fprintf (stderr, "sh_entsize = %ld\n", | |
1646 | (long) hdr->sh_entsize); | |
1647 | fflush (stderr); | |
1648 | } | |
e460dd0d | 1649 | #endif |
252b5132 | 1650 | |
e460dd0d | 1651 | #if DEBUG & 1 |
252b5132 | 1652 | static void |
268b6b39 | 1653 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1654 | { |
1655 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1656 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1657 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1658 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1659 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1660 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1661 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1662 | } | |
252b5132 RH |
1663 | #endif |
1664 | \f | |
8d6337fe | 1665 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
5979d6b6 AM |
1666 | reconstruct an ELF file by reading the segments out of remote |
1667 | memory based on the ELF file header at EHDR_VMA and the ELF program | |
1668 | headers it points to. If non-zero, SIZE is the known extent of the | |
1669 | object. If not null, *LOADBASEP is filled in with the difference | |
1670 | between the VMAs from which the segments were read, and the VMAs | |
1671 | the file headers (and hence BFD's idea of each section's VMA) put | |
1672 | them at. | |
1673 | ||
1674 | The function TARGET_READ_MEMORY is called to copy LEN bytes from | |
1675 | the remote memory at target address VMA into the local buffer at | |
1676 | MYADDR; it should return zero on success or an `errno' code on | |
1677 | failure. TEMPL must be a BFD for a target with the word size and | |
1678 | byte order found in the remote memory. */ | |
8d6337fe RM |
1679 | |
1680 | bfd * | |
268b6b39 AM |
1681 | NAME(_bfd_elf,bfd_from_remote_memory) |
1682 | (bfd *templ, | |
66631823 CE |
1683 | bfd_vma ehdr_vma /* Bytes. */, |
1684 | bfd_size_type size /* Octets. */, | |
1685 | bfd_vma *loadbasep /* Bytes. */, | |
fe78531d | 1686 | int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)) |
66631823 | 1687 | /* (Bytes , , octets ). */ |
8d6337fe RM |
1688 | { |
1689 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1690 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1691 | Elf_External_Phdr *x_phdrs; | |
5979d6b6 | 1692 | Elf_Internal_Phdr *i_phdrs, *last_phdr, *first_phdr; |
8d6337fe RM |
1693 | bfd *nbfd; |
1694 | struct bfd_in_memory *bim; | |
f075ee0c | 1695 | bfd_byte *contents; |
8d6337fe RM |
1696 | int err; |
1697 | unsigned int i; | |
5979d6b6 AM |
1698 | bfd_vma high_offset; |
1699 | bfd_vma shdr_end; | |
66631823 | 1700 | bfd_vma loadbase; /* Bytes. */ |
1f4361a7 | 1701 | size_t amt; |
66631823 | 1702 | unsigned int opb = bfd_octets_per_byte (templ, NULL); |
8d6337fe RM |
1703 | |
1704 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1705 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1706 | if (err) |
1707 | { | |
1708 | bfd_set_error (bfd_error_system_call); | |
1709 | errno = err; | |
1710 | return NULL; | |
1711 | } | |
1712 | ||
1713 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1714 | make use of. The magic number must match, the address size ('class') | |
1715 | and byte-swapping must match our XVEC entry. */ | |
1716 | ||
1717 | if (! elf_file_p (&x_ehdr) | |
1718 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1719 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1720 | { | |
1721 | bfd_set_error (bfd_error_wrong_format); | |
1722 | return NULL; | |
1723 | } | |
1724 | ||
1725 | /* Check that file's byte order matches xvec's */ | |
1726 | switch (x_ehdr.e_ident[EI_DATA]) | |
1727 | { | |
1728 | case ELFDATA2MSB: /* Big-endian */ | |
1729 | if (! bfd_header_big_endian (templ)) | |
1730 | { | |
1731 | bfd_set_error (bfd_error_wrong_format); | |
1732 | return NULL; | |
1733 | } | |
1734 | break; | |
1735 | case ELFDATA2LSB: /* Little-endian */ | |
1736 | if (! bfd_header_little_endian (templ)) | |
1737 | { | |
1738 | bfd_set_error (bfd_error_wrong_format); | |
1739 | return NULL; | |
1740 | } | |
1741 | break; | |
1742 | case ELFDATANONE: /* No data encoding specified */ | |
1743 | default: /* Unknown data encoding specified */ | |
1744 | bfd_set_error (bfd_error_wrong_format); | |
1745 | return NULL; | |
1746 | } | |
1747 | ||
1748 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1749 | ||
1750 | /* The file header tells where to find the program headers. | |
1751 | These are what we use to actually choose what to read. */ | |
1752 | ||
1753 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1754 | { | |
1755 | bfd_set_error (bfd_error_wrong_format); | |
1756 | return NULL; | |
1757 | } | |
1758 | ||
1f4361a7 AM |
1759 | if (_bfd_mul_overflow (i_ehdr.e_phnum, |
1760 | sizeof (*x_phdrs) + sizeof (*i_phdrs), &amt)) | |
1761 | { | |
1762 | bfd_set_error (bfd_error_file_too_big); | |
1763 | return NULL; | |
1764 | } | |
1765 | x_phdrs = (Elf_External_Phdr *) bfd_malloc (amt); | |
8d6337fe | 1766 | if (x_phdrs == NULL) |
5979d6b6 | 1767 | return NULL; |
f075ee0c | 1768 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1769 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1770 | if (err) | |
1771 | { | |
1772 | free (x_phdrs); | |
1773 | bfd_set_error (bfd_error_system_call); | |
1774 | errno = err; | |
1775 | return NULL; | |
1776 | } | |
1777 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1778 | ||
5979d6b6 AM |
1779 | high_offset = 0; |
1780 | loadbase = 0; | |
1781 | first_phdr = NULL; | |
8d6337fe | 1782 | last_phdr = NULL; |
8d6337fe RM |
1783 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1784 | { | |
1785 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1786 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1787 | { |
5979d6b6 AM |
1788 | bfd_vma segment_end = i_phdrs[i].p_offset + i_phdrs[i].p_filesz; |
1789 | ||
1790 | if (segment_end > high_offset) | |
3fec76aa | 1791 | { |
5979d6b6 AM |
1792 | high_offset = segment_end; |
1793 | last_phdr = &i_phdrs[i]; | |
3fec76aa | 1794 | } |
8d6337fe | 1795 | |
5979d6b6 AM |
1796 | /* If this program header covers offset zero, where the file |
1797 | header sits, then we can figure out the loadbase. */ | |
1798 | if (first_phdr == NULL) | |
1799 | { | |
66631823 CE |
1800 | bfd_vma p_offset = i_phdrs[i].p_offset; /* Octets. */ |
1801 | bfd_vma p_vaddr = i_phdrs[i].p_vaddr; /* Octets. */ | |
5979d6b6 AM |
1802 | |
1803 | if (i_phdrs[i].p_align > 1) | |
1804 | { | |
66631823 CE |
1805 | p_offset &= -(i_phdrs[i].p_align * opb); |
1806 | p_vaddr &= -(i_phdrs[i].p_align * opb); | |
5979d6b6 AM |
1807 | } |
1808 | if (p_offset == 0) | |
1809 | { | |
66631823 | 1810 | loadbase = ehdr_vma - p_vaddr / opb; |
5979d6b6 AM |
1811 | first_phdr = &i_phdrs[i]; |
1812 | } | |
1813 | } | |
8d6337fe RM |
1814 | } |
1815 | } | |
5979d6b6 | 1816 | if (high_offset == 0) |
8d6337fe RM |
1817 | { |
1818 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1819 | free (x_phdrs); | |
1820 | bfd_set_error (bfd_error_wrong_format); | |
1821 | return NULL; | |
1822 | } | |
1823 | ||
5979d6b6 AM |
1824 | shdr_end = 0; |
1825 | if (i_ehdr.e_shoff != 0 && i_ehdr.e_shnum != 0 && i_ehdr.e_shentsize != 0) | |
8d6337fe | 1826 | { |
5979d6b6 AM |
1827 | shdr_end = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; |
1828 | ||
1829 | if (last_phdr->p_filesz != last_phdr->p_memsz) | |
1830 | { | |
1831 | /* If the last PT_LOAD header has a bss area then ld.so will | |
1832 | have cleared anything past p_filesz, zapping the section | |
1833 | headers. */ | |
1834 | } | |
1835 | else if (size >= shdr_end) | |
92c9bcd4 | 1836 | high_offset = size; |
5979d6b6 AM |
1837 | else |
1838 | { | |
1839 | bfd_vma page_size = get_elf_backend_data (templ)->minpagesize; | |
1840 | bfd_vma segment_end = last_phdr->p_offset + last_phdr->p_filesz; | |
1841 | ||
1842 | /* Assume we loaded full pages, allowing us to sometimes see | |
1843 | section headers. */ | |
1844 | if (page_size > 1 && shdr_end > segment_end) | |
1845 | { | |
1846 | bfd_vma page_end = (segment_end + page_size - 1) & -page_size; | |
1847 | ||
1848 | if (page_end >= shdr_end) | |
1849 | /* Whee, section headers covered. */ | |
1850 | high_offset = shdr_end; | |
1851 | } | |
1852 | } | |
8d6337fe | 1853 | } |
8d6337fe RM |
1854 | |
1855 | /* Now we know the size of the whole image we want read in. */ | |
5979d6b6 | 1856 | contents = (bfd_byte *) bfd_zmalloc (high_offset); |
8d6337fe RM |
1857 | if (contents == NULL) |
1858 | { | |
1859 | free (x_phdrs); | |
8d6337fe RM |
1860 | return NULL; |
1861 | } | |
1862 | ||
1863 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1864 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1865 | { |
66631823 CE |
1866 | bfd_vma start = i_phdrs[i].p_offset; /* Octets. */ |
1867 | bfd_vma end = start + i_phdrs[i].p_filesz; /* Octets. */ | |
1868 | bfd_vma vaddr = i_phdrs[i].p_vaddr; /* Octets. */ | |
5979d6b6 AM |
1869 | |
1870 | /* Extend the beginning of the first pt_load to cover file | |
1871 | header and program headers, if we proved earlier that its | |
1872 | aligned offset is 0. */ | |
1873 | if (first_phdr == &i_phdrs[i]) | |
1874 | { | |
1875 | vaddr -= start; | |
1876 | start = 0; | |
1877 | } | |
1878 | /* Extend the end of the last pt_load to cover section headers. */ | |
1879 | if (last_phdr == &i_phdrs[i]) | |
1880 | end = high_offset; | |
66631823 | 1881 | err = target_read_memory (loadbase + vaddr / opb, |
8d6337fe RM |
1882 | contents + start, end - start); |
1883 | if (err) | |
1884 | { | |
1885 | free (x_phdrs); | |
1886 | free (contents); | |
1887 | bfd_set_error (bfd_error_system_call); | |
1888 | errno = err; | |
1889 | return NULL; | |
1890 | } | |
1891 | } | |
1892 | free (x_phdrs); | |
1893 | ||
1894 | /* If the segments visible in memory didn't include the section headers, | |
1895 | then clear them from the file header. */ | |
5979d6b6 | 1896 | if (high_offset < shdr_end) |
8d6337fe RM |
1897 | { |
1898 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1899 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1900 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1901 | } | |
1902 | ||
1903 | /* This will normally have been in the first PT_LOAD segment. But it | |
1904 | conceivably could be missing, and we might have just changed it. */ | |
1905 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1906 | ||
1907 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
a50b1753 | 1908 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1909 | if (bim == NULL) |
1910 | { | |
1911 | free (contents); | |
8d6337fe RM |
1912 | return NULL; |
1913 | } | |
1914 | nbfd = _bfd_new_bfd (); | |
7b958a48 AM |
1915 | if (nbfd == NULL |
1916 | || !bfd_set_filename (nbfd, "<in-memory>")) | |
8d6337fe RM |
1917 | { |
1918 | free (bim); | |
1919 | free (contents); | |
8d6337fe RM |
1920 | return NULL; |
1921 | } | |
8d6337fe | 1922 | nbfd->xvec = templ->xvec; |
5979d6b6 | 1923 | bim->size = high_offset; |
8d6337fe | 1924 | bim->buffer = contents; |
268b6b39 | 1925 | nbfd->iostream = bim; |
8d6337fe | 1926 | nbfd->flags = BFD_IN_MEMORY; |
65077aa8 TG |
1927 | nbfd->iovec = &_bfd_memory_iovec; |
1928 | nbfd->origin = 0; | |
8d6337fe RM |
1929 | nbfd->direction = read_direction; |
1930 | nbfd->mtime = time (NULL); | |
0a1b45a2 | 1931 | nbfd->mtime_set = true; |
8d6337fe RM |
1932 | |
1933 | if (loadbasep) | |
1934 | *loadbasep = loadbase; | |
1935 | return nbfd; | |
1936 | } | |
a836572f L |
1937 | |
1938 | /* Function for ELF_R_INFO. */ | |
1939 | ||
1940 | bfd_vma | |
1941 | NAME(elf,r_info) (bfd_vma sym, bfd_vma type) | |
1942 | { | |
1943 | return ELF_R_INFO (sym, type); | |
1944 | } | |
1945 | ||
1946 | /* Function for ELF_R_SYM. */ | |
1947 | ||
1948 | bfd_vma | |
1949 | NAME(elf,r_sym) (bfd_vma r_info) | |
1950 | { | |
1951 | return ELF_R_SYM (r_info); | |
1952 | } | |
8d6337fe | 1953 | \f |
252b5132 | 1954 | #include "elfcore.h" |
252b5132 RH |
1955 | \f |
1956 | /* Size-dependent data and functions. */ | |
1957 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1958 | sizeof (Elf_External_Ehdr), | |
1959 | sizeof (Elf_External_Phdr), | |
1960 | sizeof (Elf_External_Shdr), | |
1961 | sizeof (Elf_External_Rel), | |
1962 | sizeof (Elf_External_Rela), | |
1963 | sizeof (Elf_External_Sym), | |
1964 | sizeof (Elf_External_Dyn), | |
1965 | sizeof (Elf_External_Note), | |
70bcb145 | 1966 | 4, |
c7ac6ff8 | 1967 | 1, |
45d6a902 | 1968 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1969 | ELFCLASS, EV_CURRENT, |
1970 | elf_write_out_phdrs, | |
1971 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1972 | elf_checksum_contents, |
b9f66672 | 1973 | elf_write_relocs, |
73ff0d56 | 1974 | elf_swap_symbol_in, |
252b5132 RH |
1975 | elf_swap_symbol_out, |
1976 | elf_slurp_reloc_table, | |
1977 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1978 | elf_swap_dyn_in, |
1979 | elf_swap_dyn_out, | |
947216bf AM |
1980 | elf_swap_reloc_in, |
1981 | elf_swap_reloc_out, | |
1982 | elf_swap_reloca_in, | |
1983 | elf_swap_reloca_out | |
252b5132 | 1984 | }; |