Commit | Line | Data |
---|---|---|
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; |
d1036acb | 506 | const bfd_target *target; |
252b5132 RH |
507 | |
508 | /* Read in the ELF header in external format. */ | |
509 | ||
268b6b39 | 510 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
511 | { |
512 | if (bfd_get_error () != bfd_error_system_call) | |
513 | goto got_wrong_format_error; | |
514 | else | |
515 | goto got_no_match; | |
516 | } | |
517 | ||
518 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
519 | make use of. The magic number must match, the address size ('class') | |
520 | and byte-swapping must match our XVEC entry, and it must have a | |
521 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 522 | file). */ |
252b5132 | 523 | |
82e51918 AM |
524 | if (! elf_file_p (&x_ehdr) |
525 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
526 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
527 | goto got_wrong_format_error; |
528 | ||
529 | /* Check that file's byte order matches xvec's */ | |
530 | switch (x_ehdr.e_ident[EI_DATA]) | |
531 | { | |
532 | case ELFDATA2MSB: /* Big-endian */ | |
533 | if (! bfd_header_big_endian (abfd)) | |
534 | goto got_wrong_format_error; | |
535 | break; | |
536 | case ELFDATA2LSB: /* Little-endian */ | |
537 | if (! bfd_header_little_endian (abfd)) | |
538 | goto got_wrong_format_error; | |
539 | break; | |
540 | case ELFDATANONE: /* No data encoding specified */ | |
541 | default: /* Unknown data encoding specified */ | |
542 | goto got_wrong_format_error; | |
543 | } | |
544 | ||
d1036acb L |
545 | target = abfd->xvec; |
546 | ||
252b5132 RH |
547 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
548 | the tdata pointer in the bfd. */ | |
549 | ||
d1036acb | 550 | if (! (*target->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 551 | goto got_no_match; |
e84d6fca | 552 | |
252b5132 RH |
553 | /* Now that we know the byte order, swap in the rest of the header */ |
554 | i_ehdrp = elf_elfheader (abfd); | |
555 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
556 | #if DEBUG & 1 | |
557 | elf_debug_file (i_ehdrp); | |
558 | #endif | |
559 | ||
560 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
561 | if (i_ehdrp->e_type == ET_CORE) | |
562 | goto got_wrong_format_error; | |
563 | ||
0c35f01a AM |
564 | /* If this is a relocatable file and there is no section header |
565 | table, then we're hosed. */ | |
566 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
567 | goto got_wrong_format_error; |
568 | ||
e460dd0d | 569 | /* As a simple sanity check, verify that what BFD thinks is the |
252b5132 | 570 | size of each section header table entry actually matches the size |
0c35f01a AM |
571 | recorded in the file, but only if there are any sections. */ |
572 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
573 | goto got_wrong_format_error; |
574 | ||
7ece0d85 JJ |
575 | /* Further sanity check. */ |
576 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
577 | goto got_wrong_format_error; | |
578 | ||
252b5132 | 579 | ebd = get_elf_backend_data (abfd); |
11a7ae4f AM |
580 | if (ebd->s->arch_size != ARCH_SIZE) |
581 | goto got_wrong_format_error; | |
252b5132 RH |
582 | |
583 | /* Check that the ELF e_machine field matches what this particular | |
584 | BFD format expects. */ | |
585 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
586 | && (ebd->elf_machine_alt1 == 0 |
587 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
588 | && (ebd->elf_machine_alt2 == 0 | |
0aabe54e AM |
589 | || i_ehdrp->e_machine != ebd->elf_machine_alt2) |
590 | && ebd->elf_machine_code != EM_NONE) | |
591 | goto got_wrong_format_error; | |
252b5132 RH |
592 | |
593 | if (i_ehdrp->e_type == ET_EXEC) | |
594 | abfd->flags |= EXEC_P; | |
595 | else if (i_ehdrp->e_type == ET_DYN) | |
596 | abfd->flags |= DYNAMIC; | |
597 | ||
598 | if (i_ehdrp->e_phnum > 0) | |
599 | abfd->flags |= D_PAGED; | |
600 | ||
601 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
602 | { | |
603 | /* It's OK if this fails for the generic target. */ | |
604 | if (ebd->elf_machine_code != EM_NONE) | |
605 | goto got_no_match; | |
606 | } | |
607 | ||
d1036acb | 608 | if (ebd->elf_machine_code != EM_NONE |
0aabe54e AM |
609 | && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi |
610 | && ebd->elf_osabi != ELFOSABI_NONE) | |
611 | goto got_wrong_format_error; | |
d1036acb | 612 | |
7ece0d85 JJ |
613 | if (i_ehdrp->e_shoff != 0) |
614 | { | |
b32a5c16 | 615 | file_ptr where = (file_ptr) i_ehdrp->e_shoff; |
0560d0f7 | 616 | |
7ece0d85 | 617 | /* Seek to the section header table in the file. */ |
b32a5c16 | 618 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
7ece0d85 | 619 | goto got_no_match; |
5732c114 | 620 | |
7ece0d85 JJ |
621 | /* Read the first section header at index 0, and convert to internal |
622 | form. */ | |
268b6b39 | 623 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
624 | goto got_no_match; |
625 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 626 | |
7ece0d85 JJ |
627 | /* If the section count is zero, the actual count is in the first |
628 | section header. */ | |
629 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
0560d0f7 AM |
630 | { |
631 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
1c52a645 L |
632 | if (i_ehdrp->e_shnum >= SHN_LORESERVE |
633 | || i_ehdrp->e_shnum != i_shdr.sh_size | |
634 | || i_ehdrp->e_shnum == 0) | |
0560d0f7 AM |
635 | goto got_wrong_format_error; |
636 | } | |
5732c114 | 637 | |
7ece0d85 | 638 | /* And similarly for the string table index. */ |
4fbb74a6 | 639 | if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff)) |
0560d0f7 AM |
640 | { |
641 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
642 | if (i_ehdrp->e_shstrndx != i_shdr.sh_link) | |
643 | goto got_wrong_format_error; | |
644 | } | |
645 | ||
ecd12bc1 AM |
646 | /* And program headers. */ |
647 | if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0) | |
648 | { | |
649 | i_ehdrp->e_phnum = i_shdr.sh_info; | |
650 | if (i_ehdrp->e_phnum != i_shdr.sh_info) | |
651 | goto got_wrong_format_error; | |
652 | } | |
653 | ||
0560d0f7 AM |
654 | /* Sanity check that we can read all of the section headers. |
655 | It ought to be good enough to just read the last one. */ | |
656 | if (i_ehdrp->e_shnum != 1) | |
657 | { | |
658 | /* Check that we don't have a totally silly number of sections. */ | |
24639c7d JJ |
659 | if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr) |
660 | || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr)) | |
0560d0f7 AM |
661 | goto got_wrong_format_error; |
662 | ||
663 | where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr); | |
0560d0f7 AM |
664 | if ((bfd_size_type) where <= i_ehdrp->e_shoff) |
665 | goto got_wrong_format_error; | |
666 | ||
b32a5c16 | 667 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
668 | goto got_no_match; |
669 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) | |
670 | goto got_no_match; | |
671 | ||
672 | /* Back to where we were. */ | |
673 | where = i_ehdrp->e_shoff + sizeof (x_shdr); | |
b32a5c16 | 674 | if (bfd_seek (abfd, where, SEEK_SET) != 0) |
0560d0f7 AM |
675 | goto got_no_match; |
676 | } | |
7ece0d85 | 677 | } |
5732c114 | 678 | |
252b5132 | 679 | /* Allocate space for a copy of the section header table in |
5732c114 | 680 | internal form. */ |
0c35f01a AM |
681 | if (i_ehdrp->e_shnum != 0) |
682 | { | |
5732c114 | 683 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 684 | unsigned int num_sec; |
5732c114 | 685 | |
c20f6f63 AM |
686 | #ifndef BFD64 |
687 | if (i_ehdrp->e_shnum > ((bfd_size_type) -1) / sizeof (*i_shdrp)) | |
688 | goto got_wrong_format_error; | |
689 | #endif | |
7a6e0d89 AM |
690 | i_shdrp = (Elf_Internal_Shdr *) bfd_alloc2 (abfd, i_ehdrp->e_shnum, |
691 | sizeof (*i_shdrp)); | |
5732c114 AM |
692 | if (!i_shdrp) |
693 | goto got_no_match; | |
9ad5cbcf | 694 | num_sec = i_ehdrp->e_shnum; |
9ad5cbcf | 695 | elf_numsections (abfd) = num_sec; |
7a6e0d89 AM |
696 | elf_elfsections (abfd) |
697 | = (Elf_Internal_Shdr **) bfd_alloc2 (abfd, num_sec, sizeof (i_shdrp)); | |
5732c114 | 698 | if (!elf_elfsections (abfd)) |
0c35f01a | 699 | goto got_no_match; |
5732c114 AM |
700 | |
701 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
4fbb74a6 | 702 | for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++) |
5732c114 | 703 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 704 | |
ed591155 AM |
705 | /* Read in the rest of the section header table and convert it |
706 | to internal form. */ | |
707 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
708 | { | |
268b6b39 | 709 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
710 | goto got_no_match; |
711 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
712 | ||
24639c7d | 713 | /* Sanity check sh_link and sh_info. */ |
4fbb74a6 | 714 | if (i_shdrp[shindex].sh_link >= num_sec) |
cfcac11d | 715 | { |
caa83f8b | 716 | /* PR 10478: Accept Solaris binaries with a sh_link |
cfcac11d NC |
717 | field set to SHN_BEFORE or SHN_AFTER. */ |
718 | switch (ebd->elf_machine_code) | |
719 | { | |
caa83f8b | 720 | case EM_386: |
22abe556 | 721 | case EM_IAMCU: |
caa83f8b | 722 | case EM_X86_64: |
cfcac11d NC |
723 | case EM_OLD_SPARCV9: |
724 | case EM_SPARC32PLUS: | |
725 | case EM_SPARCV9: | |
726 | case EM_SPARC: | |
727 | if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */ | |
728 | || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */) | |
729 | break; | |
730 | /* Otherwise fall through. */ | |
731 | default: | |
732 | goto got_wrong_format_error; | |
733 | } | |
734 | } | |
24639c7d JJ |
735 | |
736 | if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK) | |
737 | || i_shdrp[shindex].sh_type == SHT_RELA | |
738 | || i_shdrp[shindex].sh_type == SHT_REL) | |
4fbb74a6 | 739 | && i_shdrp[shindex].sh_info >= num_sec) |
24639c7d JJ |
740 | goto got_wrong_format_error; |
741 | ||
ed591155 AM |
742 | /* If the section is loaded, but not page aligned, clear |
743 | D_PAGED. */ | |
744 | if (i_shdrp[shindex].sh_size != 0 | |
745 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
746 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
747 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 748 | % ebd->minpagesize) |
ed591155 AM |
749 | != 0)) |
750 | abfd->flags &= ~D_PAGED; | |
751 | } | |
252b5132 | 752 | } |
ed591155 | 753 | |
24639c7d JJ |
754 | /* A further sanity check. */ |
755 | if (i_ehdrp->e_shnum != 0) | |
756 | { | |
4fbb74a6 | 757 | if (i_ehdrp->e_shstrndx >= elf_numsections (abfd)) |
0b49d371 NC |
758 | { |
759 | /* PR 2257: | |
760 | We used to just goto got_wrong_format_error here | |
761 | but there are binaries in existance for which this test | |
762 | will prevent the binutils from working with them at all. | |
763 | So we are kind, and reset the string index value to 0 | |
764 | so that at least some processing can be done. */ | |
765 | i_ehdrp->e_shstrndx = SHN_UNDEF; | |
dae82561 | 766 | _bfd_error_handler |
871b3ab2 | 767 | (_("warning: %pB has a corrupt string table index - ignoring"), |
dae82561 | 768 | abfd); |
0b49d371 | 769 | } |
24639c7d | 770 | } |
0b49d371 | 771 | else if (i_ehdrp->e_shstrndx != SHN_UNDEF) |
24639c7d JJ |
772 | goto got_wrong_format_error; |
773 | ||
252b5132 RH |
774 | /* Read in the program headers. */ |
775 | if (i_ehdrp->e_phnum == 0) | |
776 | elf_tdata (abfd)->phdr = NULL; | |
777 | else | |
778 | { | |
779 | Elf_Internal_Phdr *i_phdr; | |
780 | unsigned int i; | |
781 | ||
c20f6f63 AM |
782 | #ifndef BFD64 |
783 | if (i_ehdrp->e_phnum > ((bfd_size_type) -1) / sizeof (*i_phdr)) | |
784 | goto got_wrong_format_error; | |
785 | #endif | |
5f60af5d NC |
786 | /* Check for a corrupt input file with an impossibly large number |
787 | of program headers. */ | |
788 | if (bfd_get_file_size (abfd) > 0 | |
789 | && i_ehdrp->e_phnum > bfd_get_file_size (abfd)) | |
790 | goto got_no_match; | |
7a6e0d89 AM |
791 | elf_tdata (abfd)->phdr |
792 | = (Elf_Internal_Phdr *) bfd_alloc2 (abfd, i_ehdrp->e_phnum, | |
793 | sizeof (*i_phdr)); | |
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; | |
7a6e0d89 AM |
906 | rela_hdr->contents = (unsigned char *) bfd_alloc2 (abfd, sec->reloc_count, |
907 | rela_hdr->sh_entsize); | |
252b5132 RH |
908 | if (rela_hdr->contents == NULL) |
909 | { | |
b34976b6 | 910 | *failedp = TRUE; |
252b5132 RH |
911 | return; |
912 | } | |
913 | ||
bf572ba0 MM |
914 | /* Figure out whether the relocations are RELA or REL relocations. */ |
915 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
916 | { |
917 | swap_out = elf_swap_reloca_out; | |
918 | extsize = sizeof (Elf_External_Rela); | |
919 | } | |
bf572ba0 | 920 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
921 | { |
922 | swap_out = elf_swap_reloc_out; | |
923 | extsize = sizeof (Elf_External_Rel); | |
924 | } | |
bf572ba0 MM |
925 | else |
926 | /* Every relocation section should be either an SHT_RELA or an | |
927 | SHT_REL section. */ | |
928 | abort (); | |
929 | ||
947216bf AM |
930 | /* The address of an ELF reloc is section relative for an object |
931 | file, and absolute for an executable file or shared library. | |
932 | The address of a BFD reloc is always section relative. */ | |
933 | addr_offset = 0; | |
934 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
935 | addr_offset = sec->vma; | |
936 | ||
3e932841 | 937 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
938 | last_sym = 0; |
939 | last_sym_idx = 0; | |
940 | dst_rela = rela_hdr->contents; | |
252b5132 | 941 | |
947216bf AM |
942 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
943 | { | |
944 | Elf_Internal_Rela src_rela; | |
945 | arelent *ptr; | |
946 | asymbol *sym; | |
947 | int n; | |
948 | ||
949 | ptr = sec->orelocation[idx]; | |
950 | sym = *ptr->sym_ptr_ptr; | |
951 | if (sym == last_sym) | |
952 | n = last_sym_idx; | |
953 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
954 | n = STN_UNDEF; | |
955 | else | |
252b5132 | 956 | { |
947216bf AM |
957 | last_sym = sym; |
958 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
959 | if (n < 0) | |
252b5132 | 960 | { |
b34976b6 | 961 | *failedp = TRUE; |
252b5132 RH |
962 | return; |
963 | } | |
947216bf | 964 | last_sym_idx = n; |
252b5132 | 965 | } |
252b5132 | 966 | |
947216bf AM |
967 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
968 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
969 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 970 | { |
b34976b6 | 971 | *failedp = TRUE; |
947216bf | 972 | return; |
252b5132 | 973 | } |
947216bf | 974 | |
2d054e6b NC |
975 | if (ptr->howto == NULL) |
976 | { | |
977 | *failedp = TRUE; | |
978 | return; | |
979 | } | |
980 | ||
947216bf AM |
981 | src_rela.r_offset = ptr->address + addr_offset; |
982 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
983 | src_rela.r_addend = ptr->addend; | |
984 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
985 | } |
986 | } | |
987 | ||
988 | /* Write out the program headers. */ | |
989 | ||
990 | int | |
268b6b39 AM |
991 | elf_write_out_phdrs (bfd *abfd, |
992 | const Elf_Internal_Phdr *phdr, | |
993 | unsigned int count) | |
252b5132 RH |
994 | { |
995 | while (count--) | |
996 | { | |
997 | Elf_External_Phdr extphdr; | |
1a9ccd70 | 998 | |
252b5132 | 999 | elf_swap_phdr_out (abfd, phdr, &extphdr); |
268b6b39 AM |
1000 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
1001 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
1002 | return -1; |
1003 | phdr++; | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | /* Write out the section headers and the ELF file header. */ | |
1009 | ||
b34976b6 | 1010 | bfd_boolean |
268b6b39 | 1011 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
1012 | { |
1013 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1014 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1015 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1016 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
1017 | unsigned int count; | |
dc810e39 | 1018 | bfd_size_type amt; |
252b5132 RH |
1019 | |
1020 | i_ehdrp = elf_elfheader (abfd); | |
1021 | i_shdrp = elf_elfsections (abfd); | |
1022 | ||
3e932841 | 1023 | /* swap the header before spitting it out... */ |
252b5132 RH |
1024 | |
1025 | #if DEBUG & 1 | |
1026 | elf_debug_file (i_ehdrp); | |
1027 | #endif | |
1028 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 1029 | amt = sizeof (x_ehdr); |
252b5132 | 1030 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 1031 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 1032 | return FALSE; |
252b5132 | 1033 | |
5732c114 AM |
1034 | /* Some fields in the first section header handle overflow of ehdr |
1035 | fields. */ | |
ecd12bc1 AM |
1036 | if (i_ehdrp->e_phnum >= PN_XNUM) |
1037 | i_shdrp[0]->sh_info = i_ehdrp->e_phnum; | |
4fbb74a6 | 1038 | if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff)) |
5732c114 | 1039 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; |
4fbb74a6 | 1040 | if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff)) |
5732c114 AM |
1041 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; |
1042 | ||
3e932841 | 1043 | /* at this point we've concocted all the ELF sections... */ |
7a6e0d89 AM |
1044 | x_shdrp = (Elf_External_Shdr *) bfd_alloc2 (abfd, i_ehdrp->e_shnum, |
1045 | sizeof (*x_shdrp)); | |
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 | 1055 | } |
7a6e0d89 | 1056 | amt = (bfd_size_type) i_ehdrp->e_shnum * sizeof (*x_shdrp); |
252b5132 | 1057 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
268b6b39 | 1058 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 1059 | return FALSE; |
252b5132 | 1060 | |
3e932841 | 1061 | /* need to dump the string table too... */ |
252b5132 | 1062 | |
b34976b6 | 1063 | return TRUE; |
252b5132 RH |
1064 | } |
1065 | ||
d94838b1 RM |
1066 | bfd_boolean |
1067 | elf_checksum_contents (bfd *abfd, | |
1068 | void (*process) (const void *, size_t, void *), | |
1069 | void *arg) | |
1070 | { | |
1071 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1072 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
1073 | Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr; | |
1074 | unsigned int count, num; | |
1075 | ||
1076 | { | |
1077 | Elf_External_Ehdr x_ehdr; | |
1078 | Elf_Internal_Ehdr i_ehdr; | |
1079 | ||
1080 | i_ehdr = *i_ehdrp; | |
1081 | i_ehdr.e_phoff = i_ehdr.e_shoff = 0; | |
1082 | elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr); | |
1083 | (*process) (&x_ehdr, sizeof x_ehdr, arg); | |
1084 | } | |
1085 | ||
1086 | num = i_ehdrp->e_phnum; | |
1087 | for (count = 0; count < num; count++) | |
1088 | { | |
1089 | Elf_External_Phdr x_phdr; | |
1090 | elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr); | |
1091 | (*process) (&x_phdr, sizeof x_phdr, arg); | |
1092 | } | |
1093 | ||
1094 | num = elf_numsections (abfd); | |
1095 | for (count = 0; count < num; count++) | |
1096 | { | |
1097 | Elf_Internal_Shdr i_shdr; | |
1098 | Elf_External_Shdr x_shdr; | |
9f7c3e5e | 1099 | bfd_byte *contents, *free_contents; |
d94838b1 RM |
1100 | |
1101 | i_shdr = *i_shdrp[count]; | |
1102 | i_shdr.sh_offset = 0; | |
1103 | ||
1104 | elf_swap_shdr_out (abfd, &i_shdr, &x_shdr); | |
1105 | (*process) (&x_shdr, sizeof x_shdr, arg); | |
1106 | ||
9f7c3e5e AM |
1107 | /* Process the section's contents, if it has some. |
1108 | PR ld/12451: Read them in if necessary. */ | |
1109 | if (i_shdr.sh_type == SHT_NOBITS) | |
1110 | continue; | |
1111 | free_contents = NULL; | |
1112 | contents = i_shdr.contents; | |
1113 | if (contents == NULL) | |
4d48ecf3 NC |
1114 | { |
1115 | asection *sec; | |
1116 | ||
1117 | sec = bfd_section_from_elf_index (abfd, count); | |
1118 | if (sec != NULL) | |
1119 | { | |
9f7c3e5e AM |
1120 | contents = sec->contents; |
1121 | if (contents == NULL) | |
4d48ecf3 NC |
1122 | { |
1123 | /* Force rereading from file. */ | |
1124 | sec->flags &= ~SEC_IN_MEMORY; | |
9f7c3e5e | 1125 | if (!bfd_malloc_and_get_section (abfd, sec, &free_contents)) |
4d48ecf3 | 1126 | continue; |
9f7c3e5e | 1127 | contents = free_contents; |
4d48ecf3 | 1128 | } |
4d48ecf3 NC |
1129 | } |
1130 | } | |
9f7c3e5e AM |
1131 | if (contents != NULL) |
1132 | { | |
1133 | (*process) (contents, i_shdr.sh_size, arg); | |
1134 | if (free_contents != NULL) | |
1135 | free (free_contents); | |
1136 | } | |
d94838b1 RM |
1137 | } |
1138 | ||
1139 | return TRUE; | |
1140 | } | |
1141 | ||
252b5132 | 1142 | long |
268b6b39 | 1143 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1144 | { |
1145 | Elf_Internal_Shdr *hdr; | |
1146 | Elf_Internal_Shdr *verhdr; | |
1147 | unsigned long symcount; /* Number of external ELF symbols */ | |
1148 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1149 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1150 | Elf_Internal_Sym *isym; |
1151 | Elf_Internal_Sym *isymend; | |
1152 | Elf_Internal_Sym *isymbuf = NULL; | |
1153 | Elf_External_Versym *xver; | |
1154 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1155 | const struct elf_backend_data *ebd; |
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 | |
7a6e0d89 AM |
1200 | symbase = (elf_symbol_type *) bfd_zalloc2 (abfd, symcount, |
1201 | sizeof (elf_symbol_type)); | |
252b5132 | 1202 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1203 | goto error_return; |
252b5132 RH |
1204 | |
1205 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1206 | if (verhdr != NULL |
1207 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1208 | { | |
4eca0228 | 1209 | _bfd_error_handler |
695344c0 | 1210 | /* xgettext:c-format */ |
2dcf00ce AM |
1211 | (_("%pB: version count (%" PRId64 ")" |
1212 | " does not match symbol count (%ld)"), | |
dae82561 | 1213 | abfd, |
2dcf00ce | 1214 | (int64_t) (verhdr->sh_size / sizeof (Elf_External_Versym)), |
252b5132 RH |
1215 | symcount); |
1216 | ||
1217 | /* Slurp in the symbols without the version information, | |
0560d0f7 | 1218 | since that is more helpful than just quitting. */ |
252b5132 RH |
1219 | verhdr = NULL; |
1220 | } | |
1221 | ||
1222 | if (verhdr != NULL) | |
1223 | { | |
1224 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1225 | goto error_return; | |
1226 | ||
a50b1753 | 1227 | xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1228 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1229 | goto error_return; |
1230 | ||
268b6b39 | 1231 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1232 | goto error_return; |
1233 | } | |
1234 | ||
1235 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1236 | xver = xverbuf; |
1237 | if (xver != NULL) | |
1238 | ++xver; | |
1239 | isymend = isymbuf + symcount; | |
1240 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1241 | { |
6cdc0ccc | 1242 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 | 1243 | |
896ca098 | 1244 | sym->symbol.the_bfd = abfd; |
26c61ae5 | 1245 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL); |
6cdc0ccc | 1246 | sym->symbol.value = isym->st_value; |
252b5132 | 1247 | |
6cdc0ccc | 1248 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1249 | { |
1250 | sym->symbol.section = bfd_und_section_ptr; | |
1251 | } | |
6cdc0ccc | 1252 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1253 | { |
1254 | sym->symbol.section = bfd_abs_section_ptr; | |
1255 | } | |
6cdc0ccc | 1256 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1257 | { |
1258 | sym->symbol.section = bfd_com_section_ptr; | |
02d00247 AM |
1259 | if ((abfd->flags & BFD_PLUGIN) != 0) |
1260 | { | |
1261 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
1262 | ||
1263 | if (xc == NULL) | |
1264 | { | |
1265 | flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
1266 | | SEC_EXCLUDE); | |
1267 | xc = bfd_make_section_with_flags (abfd, "COMMON", flags); | |
1268 | if (xc == NULL) | |
1269 | goto error_return; | |
1270 | } | |
1271 | sym->symbol.section = xc; | |
1272 | } | |
252b5132 RH |
1273 | /* Elf puts the alignment into the `value' field, and |
1274 | the size into the `size' field. BFD wants to see the | |
1275 | size in the value field, and doesn't care (at the | |
1276 | moment) about the alignment. */ | |
6cdc0ccc | 1277 | sym->symbol.value = isym->st_size; |
252b5132 | 1278 | } |
252b5132 | 1279 | else |
cb33740c AM |
1280 | { |
1281 | sym->symbol.section | |
1282 | = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1283 | if (sym->symbol.section == NULL) | |
1284 | { | |
1285 | /* This symbol is in a section for which we did not | |
1286 | create a BFD section. Just use bfd_abs_section, | |
1287 | although it is wrong. FIXME. */ | |
1288 | sym->symbol.section = bfd_abs_section_ptr; | |
1289 | } | |
1290 | } | |
252b5132 | 1291 | |
1049f94e | 1292 | /* If this is a relocatable file, then the symbol value is |
0560d0f7 | 1293 | already section relative. */ |
252b5132 RH |
1294 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1295 | sym->symbol.value -= sym->symbol.section->vma; | |
1296 | ||
6cdc0ccc | 1297 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1298 | { |
1299 | case STB_LOCAL: | |
1300 | sym->symbol.flags |= BSF_LOCAL; | |
1301 | break; | |
1302 | case STB_GLOBAL: | |
6cdc0ccc | 1303 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1304 | sym->symbol.flags |= BSF_GLOBAL; |
1305 | break; | |
1306 | case STB_WEAK: | |
1307 | sym->symbol.flags |= BSF_WEAK; | |
1308 | break; | |
3e7a7d11 NC |
1309 | case STB_GNU_UNIQUE: |
1310 | sym->symbol.flags |= BSF_GNU_UNIQUE; | |
1311 | break; | |
252b5132 RH |
1312 | } |
1313 | ||
6cdc0ccc | 1314 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1315 | { |
1316 | case STT_SECTION: | |
1317 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1318 | break; | |
1319 | case STT_FILE: | |
1320 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1321 | break; | |
1322 | case STT_FUNC: | |
1323 | sym->symbol.flags |= BSF_FUNCTION; | |
1324 | break; | |
504b7d20 NC |
1325 | case STT_COMMON: |
1326 | /* FIXME: Do we have to put the size field into the value field | |
1327 | as we do with symbols in SHN_COMMON sections (see above) ? */ | |
b8871f35 | 1328 | sym->symbol.flags |= BSF_ELF_COMMON; |
504b7d20 | 1329 | /* Fall through. */ |
252b5132 RH |
1330 | case STT_OBJECT: |
1331 | sym->symbol.flags |= BSF_OBJECT; | |
1332 | break; | |
0be9069d L |
1333 | case STT_TLS: |
1334 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1335 | break; | |
d9352518 DB |
1336 | case STT_RELC: |
1337 | sym->symbol.flags |= BSF_RELC; | |
1338 | break; | |
1339 | case STT_SRELC: | |
1340 | sym->symbol.flags |= BSF_SRELC; | |
1341 | break; | |
d8045f23 NC |
1342 | case STT_GNU_IFUNC: |
1343 | sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION; | |
1344 | break; | |
252b5132 RH |
1345 | } |
1346 | ||
1347 | if (dynamic) | |
1348 | sym->symbol.flags |= BSF_DYNAMIC; | |
1349 | ||
6cdc0ccc | 1350 | if (xver != NULL) |
252b5132 RH |
1351 | { |
1352 | Elf_Internal_Versym iversym; | |
1353 | ||
6cdc0ccc | 1354 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1355 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1356 | xver++; |
252b5132 RH |
1357 | } |
1358 | ||
1359 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1360 | if (ebd->elf_backend_symbol_processing) |
1361 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1362 | } |
1363 | } | |
1364 | ||
1365 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1366 | if (ebd->elf_backend_symbol_table_processing) |
1367 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1368 | |
1369 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1370 | ||
1371 | symcount = sym - symbase; | |
1372 | ||
1373 | /* Fill in the user's symbol pointer vector if needed. */ | |
1374 | if (symptrs) | |
1375 | { | |
1376 | long l = symcount; | |
1377 | ||
1378 | sym = symbase; | |
1379 | while (l-- > 0) | |
1380 | { | |
1381 | *symptrs++ = &sym->symbol; | |
1382 | sym++; | |
1383 | } | |
1384 | *symptrs = 0; /* Final null pointer */ | |
1385 | } | |
1386 | ||
6cdc0ccc AM |
1387 | if (xverbuf != NULL) |
1388 | free (xverbuf); | |
1389 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1390 | free (isymbuf); | |
252b5132 | 1391 | return symcount; |
9ad5cbcf | 1392 | |
252b5132 | 1393 | error_return: |
6cdc0ccc AM |
1394 | if (xverbuf != NULL) |
1395 | free (xverbuf); | |
1396 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1397 | free (isymbuf); | |
252b5132 RH |
1398 | return -1; |
1399 | } | |
1400 | ||
5c799c07 | 1401 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1402 | them. */ |
252b5132 | 1403 | |
b34976b6 | 1404 | static bfd_boolean |
268b6b39 AM |
1405 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1406 | asection *asect, | |
1407 | Elf_Internal_Shdr *rel_hdr, | |
1408 | bfd_size_type reloc_count, | |
1409 | arelent *relents, | |
1410 | asymbol **symbols, | |
1411 | bfd_boolean dynamic) | |
252b5132 | 1412 | { |
9c5bfbb7 | 1413 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1414 | void *allocated = NULL; |
252b5132 | 1415 | bfd_byte *native_relocs; |
252b5132 RH |
1416 | arelent *relent; |
1417 | unsigned int i; | |
1418 | int entsize; | |
5ad8645c | 1419 | unsigned int symcount; |
252b5132 | 1420 | |
268b6b39 | 1421 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1422 | if (allocated == NULL) |
1423 | goto error_return; | |
1424 | ||
1425 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1426 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1427 | != rel_hdr->sh_size)) |
1428 | goto error_return; | |
1429 | ||
a50b1753 | 1430 | native_relocs = (bfd_byte *) allocated; |
252b5132 | 1431 | |
252b5132 RH |
1432 | entsize = rel_hdr->sh_entsize; |
1433 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1434 | || entsize == sizeof (Elf_External_Rela)); | |
1435 | ||
5ad8645c AM |
1436 | if (dynamic) |
1437 | symcount = bfd_get_dynamic_symcount (abfd); | |
1438 | else | |
1439 | symcount = bfd_get_symcount (abfd); | |
1440 | ||
252b5132 RH |
1441 | for (i = 0, relent = relents; |
1442 | i < reloc_count; | |
1443 | i++, relent++, native_relocs += entsize) | |
1444 | { | |
f3185997 | 1445 | bfd_boolean res; |
252b5132 | 1446 | Elf_Internal_Rela rela; |
252b5132 RH |
1447 | |
1448 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1449 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1450 | else |
947216bf | 1451 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1452 | |
1453 | /* The address of an ELF reloc is section relative for an object | |
1454 | file, and absolute for an executable file or shared library. | |
1455 | The address of a normal BFD reloc is always section relative, | |
1456 | and the address of a dynamic reloc is absolute.. */ | |
1457 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1458 | relent->address = rela.r_offset; | |
1459 | else | |
1460 | relent->address = rela.r_offset - asect->vma; | |
1461 | ||
cf35638d | 1462 | if (ELF_R_SYM (rela.r_info) == STN_UNDEF) |
0ee5a0e4 AM |
1463 | /* FIXME: This and the error case below mean that we have a |
1464 | symbol on relocs that is not elf_symbol_type. */ | |
252b5132 | 1465 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
05a487dc | 1466 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c | 1467 | { |
4eca0228 | 1468 | _bfd_error_handler |
695344c0 | 1469 | /* xgettext:c-format */ |
871b3ab2 | 1470 | (_("%pB(%pA): relocation %d has invalid symbol index %ld"), |
76cfced5 | 1471 | abfd, asect, i, (long) ELF_R_SYM (rela.r_info)); |
f3185997 | 1472 | bfd_set_error (bfd_error_bad_value); |
45dfa85a | 1473 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
1f70368c | 1474 | } |
252b5132 RH |
1475 | else |
1476 | { | |
b48c61bc | 1477 | asymbol **ps; |
28c9d252 | 1478 | |
252b5132 | 1479 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
252b5132 | 1480 | |
f9cfae62 | 1481 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1482 | } |
1483 | ||
1484 | relent->addend = rela.r_addend; | |
1485 | ||
90fff0d4 DJ |
1486 | if ((entsize == sizeof (Elf_External_Rela) |
1487 | && ebd->elf_info_to_howto != NULL) | |
1488 | || ebd->elf_info_to_howto_rel == NULL) | |
f3185997 | 1489 | res = ebd->elf_info_to_howto (abfd, relent, &rela); |
252b5132 | 1490 | else |
f3185997 NC |
1491 | res = ebd->elf_info_to_howto_rel (abfd, relent, &rela); |
1492 | ||
1493 | if (! res || relent->howto == NULL) | |
1494 | goto error_return; | |
252b5132 RH |
1495 | } |
1496 | ||
252b5132 RH |
1497 | if (allocated != NULL) |
1498 | free (allocated); | |
b34976b6 | 1499 | return TRUE; |
252b5132 RH |
1500 | |
1501 | error_return: | |
1502 | if (allocated != NULL) | |
1503 | free (allocated); | |
b34976b6 | 1504 | return FALSE; |
252b5132 RH |
1505 | } |
1506 | ||
42fdc509 MM |
1507 | /* Read in and swap the external relocs. */ |
1508 | ||
b34976b6 | 1509 | bfd_boolean |
268b6b39 AM |
1510 | elf_slurp_reloc_table (bfd *abfd, |
1511 | asection *asect, | |
1512 | asymbol **symbols, | |
1513 | bfd_boolean dynamic) | |
42fdc509 MM |
1514 | { |
1515 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1516 | Elf_Internal_Shdr *rel_hdr; | |
1517 | Elf_Internal_Shdr *rel_hdr2; | |
1518 | bfd_size_type reloc_count; | |
1519 | bfd_size_type reloc_count2; | |
1520 | arelent *relents; | |
1521 | ||
1522 | if (asect->relocation != NULL) | |
b34976b6 | 1523 | return TRUE; |
42fdc509 MM |
1524 | |
1525 | if (! dynamic) | |
1526 | { | |
1527 | if ((asect->flags & SEC_RELOC) == 0 | |
1528 | || asect->reloc_count == 0) | |
b34976b6 | 1529 | return TRUE; |
42fdc509 | 1530 | |
d4730f92 BS |
1531 | rel_hdr = d->rel.hdr; |
1532 | reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0; | |
1533 | rel_hdr2 = d->rela.hdr; | |
1534 | reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0; | |
42fdc509 | 1535 | |
06614111 NC |
1536 | /* PR 17512: file: 0b4f81b7. */ |
1537 | if (asect->reloc_count != reloc_count + reloc_count2) | |
1538 | return FALSE; | |
d4730f92 | 1539 | BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset) |
42fdc509 MM |
1540 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); |
1541 | ||
1542 | } | |
1543 | else | |
1544 | { | |
57e21bef MM |
1545 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1546 | case because relocations against this section may use the | |
1547 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1548 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1549 | if (asect->size == 0) |
b34976b6 | 1550 | return TRUE; |
42fdc509 MM |
1551 | |
1552 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1553 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1554 | rel_hdr2 = NULL; |
57e21bef | 1555 | reloc_count2 = 0; |
42fdc509 MM |
1556 | } |
1557 | ||
7a6e0d89 AM |
1558 | relents = (arelent *) bfd_alloc2 (abfd, reloc_count + reloc_count2, |
1559 | sizeof (arelent)); | |
42fdc509 | 1560 | if (relents == NULL) |
b34976b6 | 1561 | return FALSE; |
42fdc509 | 1562 | |
d4730f92 BS |
1563 | if (rel_hdr |
1564 | && !elf_slurp_reloc_table_from_section (abfd, asect, | |
1565 | rel_hdr, reloc_count, | |
1566 | relents, | |
1567 | symbols, dynamic)) | |
b34976b6 | 1568 | return FALSE; |
60bcf0fa NC |
1569 | |
1570 | if (rel_hdr2 | |
42fdc509 MM |
1571 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1572 | rel_hdr2, reloc_count2, | |
1573 | relents + reloc_count, | |
1574 | symbols, dynamic)) | |
b34976b6 | 1575 | return FALSE; |
42fdc509 | 1576 | |
42fdc509 | 1577 | asect->relocation = relents; |
b34976b6 | 1578 | return TRUE; |
42fdc509 MM |
1579 | } |
1580 | ||
e460dd0d | 1581 | #if DEBUG & 2 |
252b5132 | 1582 | static void |
268b6b39 | 1583 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1584 | { |
1585 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1586 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1587 | (long) hdr); | |
1588 | fprintf (stderr, | |
1589 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1590 | (long) hdr->sh_name, | |
1591 | (long) hdr->sh_type, | |
1592 | (long) hdr->sh_flags); | |
1593 | fprintf (stderr, | |
1594 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1595 | (long) hdr->sh_addr, | |
1596 | (long) hdr->sh_offset, | |
1597 | (long) hdr->sh_size); | |
1598 | fprintf (stderr, | |
1599 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1600 | (long) hdr->sh_link, | |
1601 | (long) hdr->sh_info, | |
1602 | (long) hdr->sh_addralign); | |
1603 | fprintf (stderr, "sh_entsize = %ld\n", | |
1604 | (long) hdr->sh_entsize); | |
1605 | fflush (stderr); | |
1606 | } | |
e460dd0d | 1607 | #endif |
252b5132 | 1608 | |
e460dd0d | 1609 | #if DEBUG & 1 |
252b5132 | 1610 | static void |
268b6b39 | 1611 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1612 | { |
1613 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1614 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1615 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1616 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1617 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1618 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1619 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1620 | } | |
252b5132 RH |
1621 | #endif |
1622 | \f | |
8d6337fe | 1623 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
5979d6b6 AM |
1624 | reconstruct an ELF file by reading the segments out of remote |
1625 | memory based on the ELF file header at EHDR_VMA and the ELF program | |
1626 | headers it points to. If non-zero, SIZE is the known extent of the | |
1627 | object. If not null, *LOADBASEP is filled in with the difference | |
1628 | between the VMAs from which the segments were read, and the VMAs | |
1629 | the file headers (and hence BFD's idea of each section's VMA) put | |
1630 | them at. | |
1631 | ||
1632 | The function TARGET_READ_MEMORY is called to copy LEN bytes from | |
1633 | the remote memory at target address VMA into the local buffer at | |
1634 | MYADDR; it should return zero on success or an `errno' code on | |
1635 | failure. TEMPL must be a BFD for a target with the word size and | |
1636 | byte order found in the remote memory. */ | |
8d6337fe RM |
1637 | |
1638 | bfd * | |
268b6b39 AM |
1639 | NAME(_bfd_elf,bfd_from_remote_memory) |
1640 | (bfd *templ, | |
1641 | bfd_vma ehdr_vma, | |
f0a5d95a | 1642 | bfd_size_type size, |
268b6b39 | 1643 | bfd_vma *loadbasep, |
fe78531d | 1644 | int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)) |
8d6337fe RM |
1645 | { |
1646 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1647 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1648 | Elf_External_Phdr *x_phdrs; | |
5979d6b6 | 1649 | Elf_Internal_Phdr *i_phdrs, *last_phdr, *first_phdr; |
8d6337fe RM |
1650 | bfd *nbfd; |
1651 | struct bfd_in_memory *bim; | |
f075ee0c | 1652 | bfd_byte *contents; |
8d6337fe RM |
1653 | int err; |
1654 | unsigned int i; | |
5979d6b6 AM |
1655 | bfd_vma high_offset; |
1656 | bfd_vma shdr_end; | |
8d6337fe RM |
1657 | bfd_vma loadbase; |
1658 | ||
1659 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1660 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1661 | if (err) |
1662 | { | |
1663 | bfd_set_error (bfd_error_system_call); | |
1664 | errno = err; | |
1665 | return NULL; | |
1666 | } | |
1667 | ||
1668 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1669 | make use of. The magic number must match, the address size ('class') | |
1670 | and byte-swapping must match our XVEC entry. */ | |
1671 | ||
1672 | if (! elf_file_p (&x_ehdr) | |
1673 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1674 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1675 | { | |
1676 | bfd_set_error (bfd_error_wrong_format); | |
1677 | return NULL; | |
1678 | } | |
1679 | ||
1680 | /* Check that file's byte order matches xvec's */ | |
1681 | switch (x_ehdr.e_ident[EI_DATA]) | |
1682 | { | |
1683 | case ELFDATA2MSB: /* Big-endian */ | |
1684 | if (! bfd_header_big_endian (templ)) | |
1685 | { | |
1686 | bfd_set_error (bfd_error_wrong_format); | |
1687 | return NULL; | |
1688 | } | |
1689 | break; | |
1690 | case ELFDATA2LSB: /* Little-endian */ | |
1691 | if (! bfd_header_little_endian (templ)) | |
1692 | { | |
1693 | bfd_set_error (bfd_error_wrong_format); | |
1694 | return NULL; | |
1695 | } | |
1696 | break; | |
1697 | case ELFDATANONE: /* No data encoding specified */ | |
1698 | default: /* Unknown data encoding specified */ | |
1699 | bfd_set_error (bfd_error_wrong_format); | |
1700 | return NULL; | |
1701 | } | |
1702 | ||
1703 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1704 | ||
1705 | /* The file header tells where to find the program headers. | |
1706 | These are what we use to actually choose what to read. */ | |
1707 | ||
1708 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1709 | { | |
1710 | bfd_set_error (bfd_error_wrong_format); | |
1711 | return NULL; | |
1712 | } | |
1713 | ||
7a6e0d89 AM |
1714 | x_phdrs |
1715 | = (Elf_External_Phdr *) bfd_malloc2 (i_ehdr.e_phnum, | |
1716 | sizeof (*x_phdrs) + sizeof (*i_phdrs)); | |
8d6337fe | 1717 | if (x_phdrs == NULL) |
5979d6b6 | 1718 | return NULL; |
f075ee0c | 1719 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1720 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1721 | if (err) | |
1722 | { | |
1723 | free (x_phdrs); | |
1724 | bfd_set_error (bfd_error_system_call); | |
1725 | errno = err; | |
1726 | return NULL; | |
1727 | } | |
1728 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1729 | ||
5979d6b6 AM |
1730 | high_offset = 0; |
1731 | loadbase = 0; | |
1732 | first_phdr = NULL; | |
8d6337fe | 1733 | last_phdr = NULL; |
8d6337fe RM |
1734 | for (i = 0; i < i_ehdr.e_phnum; ++i) |
1735 | { | |
1736 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
3fec76aa | 1737 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1738 | { |
5979d6b6 AM |
1739 | bfd_vma segment_end = i_phdrs[i].p_offset + i_phdrs[i].p_filesz; |
1740 | ||
1741 | if (segment_end > high_offset) | |
3fec76aa | 1742 | { |
5979d6b6 AM |
1743 | high_offset = segment_end; |
1744 | last_phdr = &i_phdrs[i]; | |
3fec76aa | 1745 | } |
8d6337fe | 1746 | |
5979d6b6 AM |
1747 | /* If this program header covers offset zero, where the file |
1748 | header sits, then we can figure out the loadbase. */ | |
1749 | if (first_phdr == NULL) | |
1750 | { | |
1751 | bfd_vma p_offset = i_phdrs[i].p_offset; | |
1752 | bfd_vma p_vaddr = i_phdrs[i].p_vaddr; | |
1753 | ||
1754 | if (i_phdrs[i].p_align > 1) | |
1755 | { | |
1756 | p_offset &= -i_phdrs[i].p_align; | |
1757 | p_vaddr &= -i_phdrs[i].p_align; | |
1758 | } | |
1759 | if (p_offset == 0) | |
1760 | { | |
1761 | loadbase = ehdr_vma - p_vaddr; | |
1762 | first_phdr = &i_phdrs[i]; | |
1763 | } | |
1764 | } | |
8d6337fe RM |
1765 | } |
1766 | } | |
5979d6b6 | 1767 | if (high_offset == 0) |
8d6337fe RM |
1768 | { |
1769 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1770 | free (x_phdrs); | |
1771 | bfd_set_error (bfd_error_wrong_format); | |
1772 | return NULL; | |
1773 | } | |
1774 | ||
5979d6b6 AM |
1775 | shdr_end = 0; |
1776 | if (i_ehdr.e_shoff != 0 && i_ehdr.e_shnum != 0 && i_ehdr.e_shentsize != 0) | |
8d6337fe | 1777 | { |
5979d6b6 AM |
1778 | shdr_end = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; |
1779 | ||
1780 | if (last_phdr->p_filesz != last_phdr->p_memsz) | |
1781 | { | |
1782 | /* If the last PT_LOAD header has a bss area then ld.so will | |
1783 | have cleared anything past p_filesz, zapping the section | |
1784 | headers. */ | |
1785 | } | |
1786 | else if (size >= shdr_end) | |
92c9bcd4 | 1787 | high_offset = size; |
5979d6b6 AM |
1788 | else |
1789 | { | |
1790 | bfd_vma page_size = get_elf_backend_data (templ)->minpagesize; | |
1791 | bfd_vma segment_end = last_phdr->p_offset + last_phdr->p_filesz; | |
1792 | ||
1793 | /* Assume we loaded full pages, allowing us to sometimes see | |
1794 | section headers. */ | |
1795 | if (page_size > 1 && shdr_end > segment_end) | |
1796 | { | |
1797 | bfd_vma page_end = (segment_end + page_size - 1) & -page_size; | |
1798 | ||
1799 | if (page_end >= shdr_end) | |
1800 | /* Whee, section headers covered. */ | |
1801 | high_offset = shdr_end; | |
1802 | } | |
1803 | } | |
8d6337fe | 1804 | } |
8d6337fe RM |
1805 | |
1806 | /* Now we know the size of the whole image we want read in. */ | |
5979d6b6 | 1807 | contents = (bfd_byte *) bfd_zmalloc (high_offset); |
8d6337fe RM |
1808 | if (contents == NULL) |
1809 | { | |
1810 | free (x_phdrs); | |
8d6337fe RM |
1811 | return NULL; |
1812 | } | |
1813 | ||
1814 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
3fec76aa | 1815 | if (i_phdrs[i].p_type == PT_LOAD) |
8d6337fe | 1816 | { |
5979d6b6 AM |
1817 | bfd_vma start = i_phdrs[i].p_offset; |
1818 | bfd_vma end = start + i_phdrs[i].p_filesz; | |
1819 | bfd_vma vaddr = i_phdrs[i].p_vaddr; | |
1820 | ||
1821 | /* Extend the beginning of the first pt_load to cover file | |
1822 | header and program headers, if we proved earlier that its | |
1823 | aligned offset is 0. */ | |
1824 | if (first_phdr == &i_phdrs[i]) | |
1825 | { | |
1826 | vaddr -= start; | |
1827 | start = 0; | |
1828 | } | |
1829 | /* Extend the end of the last pt_load to cover section headers. */ | |
1830 | if (last_phdr == &i_phdrs[i]) | |
1831 | end = high_offset; | |
1832 | err = target_read_memory (loadbase + vaddr, | |
8d6337fe RM |
1833 | contents + start, end - start); |
1834 | if (err) | |
1835 | { | |
1836 | free (x_phdrs); | |
1837 | free (contents); | |
1838 | bfd_set_error (bfd_error_system_call); | |
1839 | errno = err; | |
1840 | return NULL; | |
1841 | } | |
1842 | } | |
1843 | free (x_phdrs); | |
1844 | ||
1845 | /* If the segments visible in memory didn't include the section headers, | |
1846 | then clear them from the file header. */ | |
5979d6b6 | 1847 | if (high_offset < shdr_end) |
8d6337fe RM |
1848 | { |
1849 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1850 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1851 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1852 | } | |
1853 | ||
1854 | /* This will normally have been in the first PT_LOAD segment. But it | |
1855 | conceivably could be missing, and we might have just changed it. */ | |
1856 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1857 | ||
1858 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
a50b1753 | 1859 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1860 | if (bim == NULL) |
1861 | { | |
1862 | free (contents); | |
8d6337fe RM |
1863 | return NULL; |
1864 | } | |
1865 | nbfd = _bfd_new_bfd (); | |
1866 | if (nbfd == NULL) | |
1867 | { | |
1868 | free (bim); | |
1869 | free (contents); | |
8d6337fe RM |
1870 | return NULL; |
1871 | } | |
1be5090b | 1872 | nbfd->filename = xstrdup ("<in-memory>"); |
8d6337fe | 1873 | nbfd->xvec = templ->xvec; |
5979d6b6 | 1874 | bim->size = high_offset; |
8d6337fe | 1875 | bim->buffer = contents; |
268b6b39 | 1876 | nbfd->iostream = bim; |
8d6337fe | 1877 | nbfd->flags = BFD_IN_MEMORY; |
65077aa8 TG |
1878 | nbfd->iovec = &_bfd_memory_iovec; |
1879 | nbfd->origin = 0; | |
8d6337fe RM |
1880 | nbfd->direction = read_direction; |
1881 | nbfd->mtime = time (NULL); | |
1882 | nbfd->mtime_set = TRUE; | |
1883 | ||
1884 | if (loadbasep) | |
1885 | *loadbasep = loadbase; | |
1886 | return nbfd; | |
1887 | } | |
a836572f L |
1888 | |
1889 | /* Function for ELF_R_INFO. */ | |
1890 | ||
1891 | bfd_vma | |
1892 | NAME(elf,r_info) (bfd_vma sym, bfd_vma type) | |
1893 | { | |
1894 | return ELF_R_INFO (sym, type); | |
1895 | } | |
1896 | ||
1897 | /* Function for ELF_R_SYM. */ | |
1898 | ||
1899 | bfd_vma | |
1900 | NAME(elf,r_sym) (bfd_vma r_info) | |
1901 | { | |
1902 | return ELF_R_SYM (r_info); | |
1903 | } | |
8d6337fe | 1904 | \f |
252b5132 | 1905 | #include "elfcore.h" |
252b5132 RH |
1906 | \f |
1907 | /* Size-dependent data and functions. */ | |
1908 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1909 | sizeof (Elf_External_Ehdr), | |
1910 | sizeof (Elf_External_Phdr), | |
1911 | sizeof (Elf_External_Shdr), | |
1912 | sizeof (Elf_External_Rel), | |
1913 | sizeof (Elf_External_Rela), | |
1914 | sizeof (Elf_External_Sym), | |
1915 | sizeof (Elf_External_Dyn), | |
1916 | sizeof (Elf_External_Note), | |
70bcb145 | 1917 | 4, |
c7ac6ff8 | 1918 | 1, |
45d6a902 | 1919 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1920 | ELFCLASS, EV_CURRENT, |
1921 | elf_write_out_phdrs, | |
1922 | elf_write_shdrs_and_ehdr, | |
d94838b1 | 1923 | elf_checksum_contents, |
b9f66672 | 1924 | elf_write_relocs, |
73ff0d56 | 1925 | elf_swap_symbol_in, |
252b5132 RH |
1926 | elf_swap_symbol_out, |
1927 | elf_slurp_reloc_table, | |
1928 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1929 | elf_swap_dyn_in, |
1930 | elf_swap_dyn_out, | |
947216bf AM |
1931 | elf_swap_reloc_in, |
1932 | elf_swap_reloc_out, | |
1933 | elf_swap_reloca_in, | |
1934 | elf_swap_reloca_out | |
252b5132 | 1935 | }; |