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252b5132 | 1 | /* ELF executable support for BFD. |
7898deda | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
b1342370 | 3 | 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | Written by Fred Fish @ Cygnus Support, from information published | |
6 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
7 | Programming Support Tools". Sufficient support for gdb. | |
8 | ||
9 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
10 | published in "System V Application Binary Interface", chapters 4 | |
11 | and 5, as well as the various "Processor Supplement" documents | |
12 | derived from it. Added support for assembler and other object file | |
13 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
14 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
15 | of Utah) to finish and extend this. | |
16 | ||
17 | This file is part of BFD, the Binary File Descriptor library. | |
18 | ||
19 | This program is free software; you can redistribute it and/or modify | |
20 | it under the terms of the GNU General Public License as published by | |
21 | the Free Software Foundation; either version 2 of the License, or | |
22 | (at your option) any later version. | |
23 | ||
24 | This program is distributed in the hope that it will be useful, | |
25 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | GNU General Public License for more details. | |
28 | ||
29 | You should have received a copy of the GNU General Public License | |
30 | along with this program; if not, write to the Free Software | |
31 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
32 | ||
33 | /* Problems and other issues to resolve. | |
34 | ||
35 | (1) BFD expects there to be some fixed number of "sections" in | |
36 | the object file. I.E. there is a "section_count" variable in the | |
37 | bfd structure which contains the number of sections. However, ELF | |
38 | supports multiple "views" of a file. In particular, with current | |
39 | implementations, executable files typically have two tables, a | |
40 | program header table and a section header table, both of which | |
41 | partition the executable. | |
42 | ||
43 | In ELF-speak, the "linking view" of the file uses the section header | |
44 | table to access "sections" within the file, and the "execution view" | |
45 | uses the program header table to access "segments" within the file. | |
46 | "Segments" typically may contain all the data from one or more | |
47 | "sections". | |
48 | ||
49 | Note that the section header table is optional in ELF executables, | |
50 | but it is this information that is most useful to gdb. If the | |
51 | section header table is missing, then gdb should probably try | |
52 | to make do with the program header table. (FIXME) | |
53 | ||
54 | (2) The code in this file is compiled twice, once in 32-bit mode and | |
55 | once in 64-bit mode. More of it should be made size-independent | |
56 | and moved into elf.c. | |
57 | ||
58 | (3) ELF section symbols are handled rather sloppily now. This should | |
59 | be cleaned up, and ELF section symbols reconciled with BFD section | |
60 | symbols. | |
61 | ||
62 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
63 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
64 | it's cast in stone. | |
65 | */ | |
66 | ||
67 | #include "bfd.h" | |
68 | #include "sysdep.h" | |
210ba1e8 | 69 | #include "libiberty.h" |
252b5132 RH |
70 | #include "bfdlink.h" |
71 | #include "libbfd.h" | |
72 | #include "elf-bfd.h" | |
73 | ||
74 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ | |
75 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) | |
76 | #define Elf_External_Sym NAME(Elf,External_Sym) | |
77 | #define Elf_External_Shdr NAME(Elf,External_Shdr) | |
78 | #define Elf_External_Phdr NAME(Elf,External_Phdr) | |
79 | #define Elf_External_Rel NAME(Elf,External_Rel) | |
80 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
81 | #define Elf_External_Dyn NAME(Elf,External_Dyn) | |
82 | ||
83 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) | |
84 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
85 | #define elf_core_file_matches_executable_p \ | |
86 | NAME(bfd_elf,core_file_matches_executable_p) | |
87 | #define elf_object_p NAME(bfd_elf,object_p) | |
88 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
89 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) | |
90 | #define elf_get_dynamic_symtab_upper_bound \ | |
91 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
92 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) | |
93 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
94 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
95 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
96 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) | |
97 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
98 | #define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in) | |
99 | #define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out) | |
100 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
101 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
102 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
103 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
104 | #define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table) | |
6cee3f79 | 105 | #define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab) |
252b5132 RH |
106 | #define elf_canonicalize_dynamic_symtab \ |
107 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
4c45e5c9 JJ |
108 | #define elf_get_synthetic_symtab \ |
109 | NAME(bfd_elf,get_synthetic_symtab) | |
252b5132 RH |
110 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
111 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
112 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
113 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
114 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
115 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
116 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
117 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
118 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
119 | #define elf_find_section NAME(bfd_elf,find_section) | |
252b5132 RH |
120 | #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr) |
121 | #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs) | |
b9f66672 JL |
122 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
123 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
124 | |
125 | #if ARCH_SIZE == 64 | |
126 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
127 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
128 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
129 | #define ELFCLASS ELFCLASS64 | |
130 | #define FILE_ALIGN 8 | |
131 | #define LOG_FILE_ALIGN 3 | |
132 | #endif | |
133 | #if ARCH_SIZE == 32 | |
134 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
135 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
136 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
137 | #define ELFCLASS ELFCLASS32 | |
138 | #define FILE_ALIGN 4 | |
139 | #define LOG_FILE_ALIGN 2 | |
140 | #endif | |
141 | ||
252b5132 | 142 | #ifdef DEBUG |
268b6b39 AM |
143 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
144 | static void elf_debug_file (Elf_Internal_Ehdr *); | |
145 | static char *elf_symbol_flags (flagword); | |
252b5132 RH |
146 | #endif |
147 | \f | |
148 | /* Structure swapping routines */ | |
149 | ||
150 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
151 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
152 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
153 | #define H_PUT_WORD H_PUT_64 |
154 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
155 | #define H_GET_WORD H_GET_64 | |
156 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
157 | #endif |
158 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
159 | #define H_PUT_WORD H_PUT_32 |
160 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
161 | #define H_GET_WORD H_GET_32 | |
162 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
163 | #endif |
164 | ||
165 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 166 | format. */ |
252b5132 RH |
167 | |
168 | void | |
268b6b39 AM |
169 | elf_swap_symbol_in (bfd *abfd, |
170 | const void *psrc, | |
171 | const void *pshn, | |
172 | Elf_Internal_Sym *dst) | |
252b5132 | 173 | { |
268b6b39 AM |
174 | const Elf_External_Sym *src = psrc; |
175 | const Elf_External_Sym_Shndx *shndx = pshn; | |
86dc0f79 RH |
176 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
177 | ||
dc810e39 | 178 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 179 | if (signed_vma) |
dc810e39 | 180 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 181 | else |
dc810e39 AM |
182 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
183 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
184 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
185 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
186 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
9ad5cbcf AM |
187 | if (dst->st_shndx == SHN_XINDEX) |
188 | { | |
189 | if (shndx == NULL) | |
190 | abort (); | |
191 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); | |
192 | } | |
252b5132 RH |
193 | } |
194 | ||
195 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 196 | format. */ |
252b5132 RH |
197 | |
198 | void | |
268b6b39 AM |
199 | elf_swap_symbol_out (bfd *abfd, |
200 | const Elf_Internal_Sym *src, | |
201 | void *cdst, | |
202 | void *shndx) | |
252b5132 | 203 | { |
9ad5cbcf | 204 | unsigned int tmp; |
268b6b39 | 205 | Elf_External_Sym *dst = cdst; |
dc810e39 AM |
206 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
207 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
208 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
209 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
210 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf AM |
211 | tmp = src->st_shndx; |
212 | if (tmp > SHN_HIRESERVE) | |
213 | { | |
214 | if (shndx == NULL) | |
215 | abort (); | |
216 | H_PUT_32 (abfd, tmp, shndx); | |
217 | tmp = SHN_XINDEX; | |
218 | } | |
219 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
220 | } |
221 | ||
252b5132 | 222 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 223 | internal format. */ |
252b5132 RH |
224 | |
225 | static void | |
268b6b39 AM |
226 | elf_swap_ehdr_in (bfd *abfd, |
227 | const Elf_External_Ehdr *src, | |
228 | Elf_Internal_Ehdr *dst) | |
252b5132 | 229 | { |
448cafa4 | 230 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 231 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
232 | dst->e_type = H_GET_16 (abfd, src->e_type); |
233 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
234 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 235 | if (signed_vma) |
dc810e39 | 236 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 237 | else |
dc810e39 AM |
238 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
239 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
240 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
241 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
242 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
243 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
244 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
245 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
246 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
247 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
248 | } |
249 | ||
250 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 251 | external format. */ |
252b5132 RH |
252 | |
253 | static void | |
268b6b39 AM |
254 | elf_swap_ehdr_out (bfd *abfd, |
255 | const Elf_Internal_Ehdr *src, | |
256 | Elf_External_Ehdr *dst) | |
252b5132 | 257 | { |
5732c114 | 258 | unsigned int tmp; |
448cafa4 | 259 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 260 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 261 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
262 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
263 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
264 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 265 | if (signed_vma) |
dc810e39 | 266 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 267 | else |
dc810e39 AM |
268 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
269 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
270 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
271 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
272 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
273 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
274 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
275 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 AM |
276 | tmp = src->e_shnum; |
277 | if (tmp >= SHN_LORESERVE) | |
278 | tmp = SHN_UNDEF; | |
279 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
280 | tmp = src->e_shstrndx; | |
281 | if (tmp >= SHN_LORESERVE) | |
282 | tmp = SHN_XINDEX; | |
283 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); | |
252b5132 RH |
284 | } |
285 | ||
252b5132 | 286 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 287 | ELF section header table entry in internal format. */ |
252b5132 RH |
288 | |
289 | static void | |
268b6b39 AM |
290 | elf_swap_shdr_in (bfd *abfd, |
291 | const Elf_External_Shdr *src, | |
292 | Elf_Internal_Shdr *dst) | |
252b5132 | 293 | { |
86dc0f79 RH |
294 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
295 | ||
dc810e39 AM |
296 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
297 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
298 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 299 | if (signed_vma) |
dc810e39 | 300 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 301 | else |
dc810e39 AM |
302 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
303 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
304 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
305 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
306 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
307 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
308 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
309 | dst->bfd_section = NULL; |
310 | dst->contents = NULL; | |
311 | } | |
312 | ||
313 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 314 | ELF section header table entry in external format. */ |
252b5132 RH |
315 | |
316 | static void | |
268b6b39 AM |
317 | elf_swap_shdr_out (bfd *abfd, |
318 | const Elf_Internal_Shdr *src, | |
319 | Elf_External_Shdr *dst) | |
252b5132 | 320 | { |
3e932841 | 321 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
322 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
323 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
324 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
325 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
326 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
327 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
328 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
329 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
330 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
331 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
332 | } |
333 | ||
252b5132 | 334 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 335 | ELF program header table entry in internal format. */ |
252b5132 RH |
336 | |
337 | void | |
268b6b39 AM |
338 | elf_swap_phdr_in (bfd *abfd, |
339 | const Elf_External_Phdr *src, | |
340 | Elf_Internal_Phdr *dst) | |
252b5132 | 341 | { |
86dc0f79 RH |
342 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
343 | ||
dc810e39 AM |
344 | dst->p_type = H_GET_32 (abfd, src->p_type); |
345 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
346 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
347 | if (signed_vma) |
348 | { | |
dc810e39 AM |
349 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
350 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
351 | } |
352 | else | |
353 | { | |
dc810e39 AM |
354 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
355 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 356 | } |
dc810e39 AM |
357 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
358 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
359 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
360 | } |
361 | ||
362 | void | |
268b6b39 AM |
363 | elf_swap_phdr_out (bfd *abfd, |
364 | const Elf_Internal_Phdr *src, | |
365 | Elf_External_Phdr *dst) | |
252b5132 | 366 | { |
3e932841 | 367 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
368 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
369 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
370 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
371 | H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr); | |
372 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); | |
373 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
374 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
375 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
376 | } |
377 | ||
3e932841 | 378 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 379 | void |
268b6b39 AM |
380 | elf_swap_reloc_in (bfd *abfd, |
381 | const bfd_byte *s, | |
382 | Elf_Internal_Rela *dst) | |
252b5132 | 383 | { |
947216bf | 384 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
385 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
386 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 387 | dst->r_addend = 0; |
252b5132 RH |
388 | } |
389 | ||
947216bf | 390 | void |
268b6b39 AM |
391 | elf_swap_reloca_in (bfd *abfd, |
392 | const bfd_byte *s, | |
393 | Elf_Internal_Rela *dst) | |
252b5132 | 394 | { |
947216bf | 395 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
396 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
397 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
398 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
399 | } |
400 | ||
3e932841 | 401 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 402 | void |
268b6b39 AM |
403 | elf_swap_reloc_out (bfd *abfd, |
404 | const Elf_Internal_Rela *src, | |
405 | bfd_byte *d) | |
252b5132 | 406 | { |
947216bf | 407 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
408 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
409 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
410 | } |
411 | ||
947216bf | 412 | void |
268b6b39 AM |
413 | elf_swap_reloca_out (bfd *abfd, |
414 | const Elf_Internal_Rela *src, | |
415 | bfd_byte *d) | |
252b5132 | 416 | { |
947216bf | 417 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
418 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
419 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
420 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
421 | } |
422 | ||
268b6b39 AM |
423 | void |
424 | elf_swap_dyn_in (bfd *abfd, | |
425 | const void *p, | |
426 | Elf_Internal_Dyn *dst) | |
252b5132 | 427 | { |
268b6b39 | 428 | const Elf_External_Dyn *src = p; |
252b5132 | 429 | |
dc810e39 AM |
430 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
431 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
432 | } |
433 | ||
268b6b39 AM |
434 | void |
435 | elf_swap_dyn_out (bfd *abfd, | |
436 | const Elf_Internal_Dyn *src, | |
437 | void *p) | |
252b5132 | 438 | { |
268b6b39 | 439 | Elf_External_Dyn *dst = p; |
c7ac6ff8 | 440 | |
dc810e39 AM |
441 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
442 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
443 | } |
444 | \f | |
445 | /* ELF .o/exec file reading */ | |
446 | ||
252b5132 RH |
447 | /* Begin processing a given object. |
448 | ||
449 | First we validate the file by reading in the ELF header and checking | |
450 | the magic number. */ | |
451 | ||
268b6b39 AM |
452 | static inline bfd_boolean |
453 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
454 | { |
455 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
456 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
457 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
458 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
459 | } | |
460 | ||
461 | /* Check to see if the file associated with ABFD matches the target vector | |
462 | that ABFD points to. | |
463 | ||
464 | Note that we may be called several times with the same ABFD, but different | |
465 | target vectors, most of which will not match. We have to avoid leaving | |
466 | any side effects in ABFD, or any data it points to (like tdata), if the | |
467 | file does not match the target vector. */ | |
468 | ||
469 | const bfd_target * | |
268b6b39 | 470 | elf_object_p (bfd *abfd) |
252b5132 RH |
471 | { |
472 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
473 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
474 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 475 | Elf_Internal_Shdr i_shdr; |
ed591155 | 476 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 | 477 | unsigned int shindex; |
9c5bfbb7 | 478 | const struct elf_backend_data *ebd; |
ed591155 | 479 | struct bfd_preserve preserve; |
252b5132 | 480 | asection *s; |
dc810e39 | 481 | bfd_size_type amt; |
252b5132 | 482 | |
e84d6fca | 483 | preserve.marker = NULL; |
a17cc40f | 484 | |
252b5132 RH |
485 | /* Read in the ELF header in external format. */ |
486 | ||
268b6b39 | 487 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
488 | { |
489 | if (bfd_get_error () != bfd_error_system_call) | |
490 | goto got_wrong_format_error; | |
491 | else | |
492 | goto got_no_match; | |
493 | } | |
494 | ||
495 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
496 | make use of. The magic number must match, the address size ('class') | |
497 | and byte-swapping must match our XVEC entry, and it must have a | |
498 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 499 | file). */ |
252b5132 | 500 | |
82e51918 AM |
501 | if (! elf_file_p (&x_ehdr) |
502 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
503 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
504 | goto got_wrong_format_error; |
505 | ||
506 | /* Check that file's byte order matches xvec's */ | |
507 | switch (x_ehdr.e_ident[EI_DATA]) | |
508 | { | |
509 | case ELFDATA2MSB: /* Big-endian */ | |
510 | if (! bfd_header_big_endian (abfd)) | |
511 | goto got_wrong_format_error; | |
512 | break; | |
513 | case ELFDATA2LSB: /* Little-endian */ | |
514 | if (! bfd_header_little_endian (abfd)) | |
515 | goto got_wrong_format_error; | |
516 | break; | |
517 | case ELFDATANONE: /* No data encoding specified */ | |
518 | default: /* Unknown data encoding specified */ | |
519 | goto got_wrong_format_error; | |
520 | } | |
521 | ||
0c83546a AM |
522 | if (!bfd_preserve_save (abfd, &preserve)) |
523 | goto got_no_match; | |
524 | ||
252b5132 RH |
525 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
526 | the tdata pointer in the bfd. */ | |
527 | ||
0c83546a | 528 | if (! (*abfd->xvec->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 529 | goto got_no_match; |
0c83546a | 530 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 531 | |
252b5132 RH |
532 | /* Now that we know the byte order, swap in the rest of the header */ |
533 | i_ehdrp = elf_elfheader (abfd); | |
534 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
535 | #if DEBUG & 1 | |
536 | elf_debug_file (i_ehdrp); | |
537 | #endif | |
538 | ||
539 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
540 | if (i_ehdrp->e_type == ET_CORE) | |
541 | goto got_wrong_format_error; | |
542 | ||
0c35f01a AM |
543 | /* If this is a relocatable file and there is no section header |
544 | table, then we're hosed. */ | |
545 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
546 | goto got_wrong_format_error; |
547 | ||
548 | /* As a simple sanity check, verify that the what BFD thinks is the | |
549 | size of each section header table entry actually matches the size | |
0c35f01a AM |
550 | recorded in the file, but only if there are any sections. */ |
551 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
552 | goto got_wrong_format_error; |
553 | ||
7ece0d85 JJ |
554 | /* Further sanity check. */ |
555 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
556 | goto got_wrong_format_error; | |
557 | ||
252b5132 RH |
558 | ebd = get_elf_backend_data (abfd); |
559 | ||
560 | /* Check that the ELF e_machine field matches what this particular | |
561 | BFD format expects. */ | |
562 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
563 | && (ebd->elf_machine_alt1 == 0 |
564 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
565 | && (ebd->elf_machine_alt2 == 0 | |
566 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 RH |
567 | { |
568 | const bfd_target * const *target_ptr; | |
569 | ||
570 | if (ebd->elf_machine_code != EM_NONE) | |
571 | goto got_wrong_format_error; | |
572 | ||
573 | /* This is the generic ELF target. Let it match any ELF target | |
574 | for which we do not have a specific backend. */ | |
575 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
576 | { | |
9c5bfbb7 | 577 | const struct elf_backend_data *back; |
252b5132 RH |
578 | |
579 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
580 | continue; | |
9c5bfbb7 | 581 | back = (const struct elf_backend_data *) (*target_ptr)->backend_data; |
252b5132 RH |
582 | if (back->elf_machine_code == i_ehdrp->e_machine |
583 | || (back->elf_machine_alt1 != 0 | |
584 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
585 | || (back->elf_machine_alt2 != 0 | |
586 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
587 | { | |
588 | /* target_ptr is an ELF backend which matches this | |
589 | object file, so reject the generic ELF target. */ | |
590 | goto got_wrong_format_error; | |
591 | } | |
592 | } | |
593 | } | |
594 | ||
595 | if (i_ehdrp->e_type == ET_EXEC) | |
596 | abfd->flags |= EXEC_P; | |
597 | else if (i_ehdrp->e_type == ET_DYN) | |
598 | abfd->flags |= DYNAMIC; | |
599 | ||
600 | if (i_ehdrp->e_phnum > 0) | |
601 | abfd->flags |= D_PAGED; | |
602 | ||
603 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
604 | { | |
605 | /* It's OK if this fails for the generic target. */ | |
606 | if (ebd->elf_machine_code != EM_NONE) | |
607 | goto got_no_match; | |
608 | } | |
609 | ||
3e932841 | 610 | /* Remember the entry point specified in the ELF file header. */ |
448cafa4 | 611 | bfd_set_start_address (abfd, i_ehdrp->e_entry); |
252b5132 | 612 | |
7ece0d85 JJ |
613 | if (i_ehdrp->e_shoff != 0) |
614 | { | |
615 | /* Seek to the section header table in the file. */ | |
616 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0) | |
617 | goto got_no_match; | |
5732c114 | 618 | |
7ece0d85 JJ |
619 | /* Read the first section header at index 0, and convert to internal |
620 | form. */ | |
268b6b39 | 621 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
622 | goto got_no_match; |
623 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 624 | |
7ece0d85 JJ |
625 | /* If the section count is zero, the actual count is in the first |
626 | section header. */ | |
627 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
628 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
5732c114 | 629 | |
7ece0d85 JJ |
630 | /* And similarly for the string table index. */ |
631 | if (i_ehdrp->e_shstrndx == SHN_XINDEX) | |
632 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
633 | } | |
5732c114 | 634 | |
252b5132 | 635 | /* Allocate space for a copy of the section header table in |
5732c114 | 636 | internal form. */ |
0c35f01a AM |
637 | if (i_ehdrp->e_shnum != 0) |
638 | { | |
5732c114 | 639 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 640 | unsigned int num_sec; |
5732c114 | 641 | |
0c35f01a | 642 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
268b6b39 | 643 | i_shdrp = bfd_alloc (abfd, amt); |
5732c114 AM |
644 | if (!i_shdrp) |
645 | goto got_no_match; | |
9ad5cbcf AM |
646 | num_sec = i_ehdrp->e_shnum; |
647 | if (num_sec > SHN_LORESERVE) | |
648 | num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
649 | elf_numsections (abfd) = num_sec; | |
650 | amt = sizeof (i_shdrp) * num_sec; | |
268b6b39 | 651 | elf_elfsections (abfd) = bfd_alloc (abfd, amt); |
5732c114 | 652 | if (!elf_elfsections (abfd)) |
0c35f01a | 653 | goto got_no_match; |
5732c114 AM |
654 | |
655 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
656 | shdrp = i_shdrp; | |
657 | shindex = 0; | |
9ad5cbcf | 658 | if (num_sec > SHN_LORESERVE) |
5732c114 AM |
659 | { |
660 | for ( ; shindex < SHN_LORESERVE; shindex++) | |
661 | elf_elfsections (abfd)[shindex] = shdrp++; | |
662 | for ( ; shindex < SHN_HIRESERVE + 1; shindex++) | |
9ad5cbcf | 663 | elf_elfsections (abfd)[shindex] = i_shdrp; |
5732c114 | 664 | } |
9ad5cbcf | 665 | for ( ; shindex < num_sec; shindex++) |
5732c114 | 666 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 667 | |
ed591155 AM |
668 | /* Read in the rest of the section header table and convert it |
669 | to internal form. */ | |
670 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
671 | { | |
268b6b39 | 672 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
673 | goto got_no_match; |
674 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
675 | ||
676 | /* If the section is loaded, but not page aligned, clear | |
677 | D_PAGED. */ | |
678 | if (i_shdrp[shindex].sh_size != 0 | |
679 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
680 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
681 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
b1342370 | 682 | % ebd->minpagesize) |
ed591155 AM |
683 | != 0)) |
684 | abfd->flags &= ~D_PAGED; | |
685 | } | |
252b5132 | 686 | } |
ed591155 | 687 | |
252b5132 RH |
688 | /* Read in the program headers. */ |
689 | if (i_ehdrp->e_phnum == 0) | |
690 | elf_tdata (abfd)->phdr = NULL; | |
691 | else | |
692 | { | |
693 | Elf_Internal_Phdr *i_phdr; | |
694 | unsigned int i; | |
695 | ||
dc810e39 | 696 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
268b6b39 | 697 | elf_tdata (abfd)->phdr = bfd_alloc (abfd, amt); |
252b5132 RH |
698 | if (elf_tdata (abfd)->phdr == NULL) |
699 | goto got_no_match; | |
dc810e39 | 700 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
701 | goto got_no_match; |
702 | i_phdr = elf_tdata (abfd)->phdr; | |
703 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
704 | { | |
705 | Elf_External_Phdr x_phdr; | |
706 | ||
268b6b39 | 707 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
708 | goto got_no_match; |
709 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
710 | } | |
711 | } | |
712 | ||
1b3a8575 | 713 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0) |
252b5132 | 714 | { |
9ad5cbcf AM |
715 | unsigned int num_sec; |
716 | ||
0c35f01a AM |
717 | /* Once all of the section headers have been read and converted, we |
718 | can start processing them. Note that the first section header is | |
719 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
720 | num_sec = elf_numsections (abfd); |
721 | for (shindex = 1; shindex < num_sec; shindex++) | |
0c35f01a AM |
722 | { |
723 | if (! bfd_section_from_shdr (abfd, shindex)) | |
724 | goto got_no_match; | |
9ad5cbcf AM |
725 | if (shindex == SHN_LORESERVE - 1) |
726 | shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
0c35f01a | 727 | } |
3d7f7666 L |
728 | |
729 | /* Set up group pointers. */ | |
730 | if (! _bfd_elf_setup_group_pointers (abfd)) | |
731 | goto got_wrong_format_error; | |
252b5132 RH |
732 | } |
733 | ||
734 | /* Let the backend double check the format and override global | |
735 | information. */ | |
736 | if (ebd->elf_backend_object_p) | |
737 | { | |
82e51918 | 738 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
739 | goto got_wrong_format_error; |
740 | } | |
741 | ||
742 | /* If we have created any reloc sections that are associated with | |
743 | debugging sections, mark the reloc sections as debugging as well. */ | |
744 | for (s = abfd->sections; s != NULL; s = s->next) | |
745 | { | |
746 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
747 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
748 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
749 | { | |
750 | unsigned long targ_index; | |
751 | asection *targ_sec; | |
752 | ||
753 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
754 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
755 | if (targ_sec != NULL | |
756 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
757 | s->flags |= SEC_DEBUGGING; | |
758 | } | |
759 | } | |
760 | ||
e84d6fca AM |
761 | bfd_preserve_finish (abfd, &preserve); |
762 | return abfd->xvec; | |
252b5132 RH |
763 | |
764 | got_wrong_format_error: | |
a77a9fef HPN |
765 | /* There is way too much undoing of half-known state here. The caller, |
766 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
767 | check match/no-match like it does. We have to rely on that a call to | |
768 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
769 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
770 | For this to work, only elf-data and the mach may be changed by the | |
771 | target-specific elf_backend_object_p function. Note that saving the | |
772 | whole bfd here and restoring it would be even worse; the first thing | |
773 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 774 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 775 | |
252b5132 | 776 | got_no_match: |
e84d6fca AM |
777 | if (preserve.marker != NULL) |
778 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 779 | return NULL; |
252b5132 RH |
780 | } |
781 | \f | |
782 | /* ELF .o/exec file writing */ | |
783 | ||
784 | /* Write out the relocs. */ | |
785 | ||
b9f66672 | 786 | void |
268b6b39 | 787 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 788 | { |
268b6b39 | 789 | bfd_boolean *failedp = data; |
252b5132 | 790 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 791 | bfd_vma addr_offset; |
c39a58e6 | 792 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
793 | size_t extsize; |
794 | bfd_byte *dst_rela; | |
252b5132 | 795 | unsigned int idx; |
947216bf AM |
796 | asymbol *last_sym; |
797 | int last_sym_idx; | |
252b5132 RH |
798 | |
799 | /* If we have already failed, don't do anything. */ | |
800 | if (*failedp) | |
801 | return; | |
802 | ||
803 | if ((sec->flags & SEC_RELOC) == 0) | |
804 | return; | |
805 | ||
806 | /* The linker backend writes the relocs out itself, and sets the | |
807 | reloc_count field to zero to inhibit writing them here. Also, | |
808 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
809 | relocs. */ | |
810 | if (sec->reloc_count == 0) | |
811 | return; | |
812 | ||
813 | rela_hdr = &elf_section_data (sec)->rel_hdr; | |
814 | ||
815 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
268b6b39 | 816 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
817 | if (rela_hdr->contents == NULL) |
818 | { | |
b34976b6 | 819 | *failedp = TRUE; |
252b5132 RH |
820 | return; |
821 | } | |
822 | ||
bf572ba0 MM |
823 | /* Figure out whether the relocations are RELA or REL relocations. */ |
824 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
825 | { |
826 | swap_out = elf_swap_reloca_out; | |
827 | extsize = sizeof (Elf_External_Rela); | |
828 | } | |
bf572ba0 | 829 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
830 | { |
831 | swap_out = elf_swap_reloc_out; | |
832 | extsize = sizeof (Elf_External_Rel); | |
833 | } | |
bf572ba0 MM |
834 | else |
835 | /* Every relocation section should be either an SHT_RELA or an | |
836 | SHT_REL section. */ | |
837 | abort (); | |
838 | ||
947216bf AM |
839 | /* The address of an ELF reloc is section relative for an object |
840 | file, and absolute for an executable file or shared library. | |
841 | The address of a BFD reloc is always section relative. */ | |
842 | addr_offset = 0; | |
843 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
844 | addr_offset = sec->vma; | |
845 | ||
3e932841 | 846 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
847 | last_sym = 0; |
848 | last_sym_idx = 0; | |
849 | dst_rela = rela_hdr->contents; | |
252b5132 | 850 | |
947216bf AM |
851 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
852 | { | |
853 | Elf_Internal_Rela src_rela; | |
854 | arelent *ptr; | |
855 | asymbol *sym; | |
856 | int n; | |
857 | ||
858 | ptr = sec->orelocation[idx]; | |
859 | sym = *ptr->sym_ptr_ptr; | |
860 | if (sym == last_sym) | |
861 | n = last_sym_idx; | |
862 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
863 | n = STN_UNDEF; | |
864 | else | |
252b5132 | 865 | { |
947216bf AM |
866 | last_sym = sym; |
867 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
868 | if (n < 0) | |
252b5132 | 869 | { |
b34976b6 | 870 | *failedp = TRUE; |
252b5132 RH |
871 | return; |
872 | } | |
947216bf | 873 | last_sym_idx = n; |
252b5132 | 874 | } |
252b5132 | 875 | |
947216bf AM |
876 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
877 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
878 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 879 | { |
b34976b6 | 880 | *failedp = TRUE; |
947216bf | 881 | return; |
252b5132 | 882 | } |
947216bf AM |
883 | |
884 | src_rela.r_offset = ptr->address + addr_offset; | |
885 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
886 | src_rela.r_addend = ptr->addend; | |
887 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
888 | } |
889 | } | |
890 | ||
891 | /* Write out the program headers. */ | |
892 | ||
893 | int | |
268b6b39 AM |
894 | elf_write_out_phdrs (bfd *abfd, |
895 | const Elf_Internal_Phdr *phdr, | |
896 | unsigned int count) | |
252b5132 RH |
897 | { |
898 | while (count--) | |
899 | { | |
900 | Elf_External_Phdr extphdr; | |
901 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
902 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
903 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
904 | return -1; |
905 | phdr++; | |
906 | } | |
907 | return 0; | |
908 | } | |
909 | ||
910 | /* Write out the section headers and the ELF file header. */ | |
911 | ||
b34976b6 | 912 | bfd_boolean |
268b6b39 | 913 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
914 | { |
915 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
916 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
917 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
918 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
919 | unsigned int count; | |
dc810e39 | 920 | bfd_size_type amt; |
252b5132 RH |
921 | |
922 | i_ehdrp = elf_elfheader (abfd); | |
923 | i_shdrp = elf_elfsections (abfd); | |
924 | ||
3e932841 | 925 | /* swap the header before spitting it out... */ |
252b5132 RH |
926 | |
927 | #if DEBUG & 1 | |
928 | elf_debug_file (i_ehdrp); | |
929 | #endif | |
930 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 931 | amt = sizeof (x_ehdr); |
252b5132 | 932 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 933 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 934 | return FALSE; |
252b5132 | 935 | |
5732c114 AM |
936 | /* Some fields in the first section header handle overflow of ehdr |
937 | fields. */ | |
938 | if (i_ehdrp->e_shnum >= SHN_LORESERVE) | |
939 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; | |
940 | if (i_ehdrp->e_shstrndx >= SHN_LORESERVE) | |
941 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; | |
942 | ||
3e932841 | 943 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
944 | amt = i_ehdrp->e_shnum; |
945 | amt *= sizeof (*x_shdrp); | |
268b6b39 | 946 | x_shdrp = bfd_alloc (abfd, amt); |
252b5132 | 947 | if (!x_shdrp) |
b34976b6 | 948 | return FALSE; |
252b5132 | 949 | |
5732c114 | 950 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
951 | { |
952 | #if DEBUG & 2 | |
5732c114 | 953 | elf_debug_section (count, *i_shdrp); |
252b5132 | 954 | #endif |
5732c114 | 955 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
b34976b6 | 956 | |
5732c114 AM |
957 | if (count == SHN_LORESERVE - 1) |
958 | i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
959 | } |
960 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 961 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 962 | return FALSE; |
252b5132 | 963 | |
3e932841 | 964 | /* need to dump the string table too... */ |
252b5132 | 965 | |
b34976b6 | 966 | return TRUE; |
252b5132 RH |
967 | } |
968 | ||
969 | long | |
268b6b39 | 970 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
971 | { |
972 | Elf_Internal_Shdr *hdr; | |
973 | Elf_Internal_Shdr *verhdr; | |
974 | unsigned long symcount; /* Number of external ELF symbols */ | |
975 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
976 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
977 | Elf_Internal_Sym *isym; |
978 | Elf_Internal_Sym *isymend; | |
979 | Elf_Internal_Sym *isymbuf = NULL; | |
980 | Elf_External_Versym *xver; | |
981 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 982 | const struct elf_backend_data *ebd; |
dc810e39 | 983 | bfd_size_type amt; |
252b5132 RH |
984 | |
985 | /* Read each raw ELF symbol, converting from external ELF form to | |
986 | internal ELF form, and then using the information to create a | |
987 | canonical bfd symbol table entry. | |
988 | ||
989 | Note that we allocate the initial bfd canonical symbol buffer | |
990 | based on a one-to-one mapping of the ELF symbols to canonical | |
991 | symbols. We actually use all the ELF symbols, so there will be no | |
992 | space left over at the end. When we have all the symbols, we | |
3e932841 | 993 | build the caller's pointer vector. */ |
252b5132 RH |
994 | |
995 | if (! dynamic) | |
996 | { | |
997 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
998 | verhdr = NULL; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1003 | if (elf_dynversym (abfd) == 0) | |
1004 | verhdr = NULL; | |
1005 | else | |
1006 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1007 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1008 | && elf_tdata (abfd)->verdef == NULL) | |
1009 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1010 | && elf_tdata (abfd)->verref == NULL)) | |
1011 | { | |
fc0e6df6 | 1012 | if (!_bfd_elf_slurp_version_tables (abfd, FALSE)) |
252b5132 RH |
1013 | return -1; |
1014 | } | |
1015 | } | |
1016 | ||
6cdc0ccc | 1017 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1018 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1019 | if (symcount == 0) |
1020 | sym = symbase = NULL; | |
1021 | else | |
1022 | { | |
6cdc0ccc AM |
1023 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1024 | NULL, NULL, NULL); | |
1025 | if (isymbuf == NULL) | |
1026 | return -1; | |
252b5132 | 1027 | |
dc810e39 AM |
1028 | amt = symcount; |
1029 | amt *= sizeof (elf_symbol_type); | |
268b6b39 | 1030 | symbase = bfd_zalloc (abfd, amt); |
252b5132 | 1031 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1032 | goto error_return; |
252b5132 RH |
1033 | |
1034 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1035 | if (verhdr != NULL |
1036 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1037 | { | |
1038 | (*_bfd_error_handler) | |
1039 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1040 | abfd->filename, | |
1041 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1042 | symcount); | |
1043 | ||
1044 | /* Slurp in the symbols without the version information, | |
1045 | since that is more helpful than just quitting. */ | |
1046 | verhdr = NULL; | |
1047 | } | |
1048 | ||
1049 | if (verhdr != NULL) | |
1050 | { | |
1051 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1052 | goto error_return; | |
1053 | ||
268b6b39 | 1054 | xverbuf = bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1055 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1056 | goto error_return; |
1057 | ||
268b6b39 | 1058 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1059 | goto error_return; |
1060 | } | |
1061 | ||
1062 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1063 | xver = xverbuf; |
1064 | if (xver != NULL) | |
1065 | ++xver; | |
1066 | isymend = isymbuf + symcount; | |
1067 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1068 | { |
6cdc0ccc | 1069 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1070 | sym->symbol.the_bfd = abfd; |
1071 | ||
5c799c07 | 1072 | sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym); |
252b5132 | 1073 | |
6cdc0ccc | 1074 | sym->symbol.value = isym->st_value; |
252b5132 | 1075 | |
6cdc0ccc | 1076 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1077 | { |
1078 | sym->symbol.section = bfd_und_section_ptr; | |
1079 | } | |
6cdc0ccc AM |
1080 | else if (isym->st_shndx < SHN_LORESERVE |
1081 | || isym->st_shndx > SHN_HIRESERVE) | |
252b5132 | 1082 | { |
140f6c8e AM |
1083 | sym->symbol.section = bfd_section_from_elf_index (abfd, |
1084 | isym->st_shndx); | |
252b5132 RH |
1085 | if (sym->symbol.section == NULL) |
1086 | { | |
1087 | /* This symbol is in a section for which we did not | |
1088 | create a BFD section. Just use bfd_abs_section, | |
1089 | although it is wrong. FIXME. */ | |
1090 | sym->symbol.section = bfd_abs_section_ptr; | |
1091 | } | |
1092 | } | |
6cdc0ccc | 1093 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1094 | { |
1095 | sym->symbol.section = bfd_abs_section_ptr; | |
1096 | } | |
6cdc0ccc | 1097 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1098 | { |
1099 | sym->symbol.section = bfd_com_section_ptr; | |
1100 | /* Elf puts the alignment into the `value' field, and | |
1101 | the size into the `size' field. BFD wants to see the | |
1102 | size in the value field, and doesn't care (at the | |
1103 | moment) about the alignment. */ | |
6cdc0ccc | 1104 | sym->symbol.value = isym->st_size; |
252b5132 | 1105 | } |
252b5132 RH |
1106 | else |
1107 | sym->symbol.section = bfd_abs_section_ptr; | |
1108 | ||
1049f94e | 1109 | /* If this is a relocatable file, then the symbol value is |
252b5132 RH |
1110 | already section relative. */ |
1111 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1112 | sym->symbol.value -= sym->symbol.section->vma; | |
1113 | ||
6cdc0ccc | 1114 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1115 | { |
1116 | case STB_LOCAL: | |
1117 | sym->symbol.flags |= BSF_LOCAL; | |
1118 | break; | |
1119 | case STB_GLOBAL: | |
6cdc0ccc | 1120 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1121 | sym->symbol.flags |= BSF_GLOBAL; |
1122 | break; | |
1123 | case STB_WEAK: | |
1124 | sym->symbol.flags |= BSF_WEAK; | |
1125 | break; | |
1126 | } | |
1127 | ||
6cdc0ccc | 1128 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1129 | { |
1130 | case STT_SECTION: | |
1131 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1132 | break; | |
1133 | case STT_FILE: | |
1134 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1135 | break; | |
1136 | case STT_FUNC: | |
1137 | sym->symbol.flags |= BSF_FUNCTION; | |
1138 | break; | |
1139 | case STT_OBJECT: | |
1140 | sym->symbol.flags |= BSF_OBJECT; | |
1141 | break; | |
0be9069d L |
1142 | case STT_TLS: |
1143 | sym->symbol.flags |= BSF_THREAD_LOCAL; | |
1144 | break; | |
252b5132 RH |
1145 | } |
1146 | ||
1147 | if (dynamic) | |
1148 | sym->symbol.flags |= BSF_DYNAMIC; | |
1149 | ||
6cdc0ccc | 1150 | if (xver != NULL) |
252b5132 RH |
1151 | { |
1152 | Elf_Internal_Versym iversym; | |
1153 | ||
6cdc0ccc | 1154 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1155 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1156 | xver++; |
252b5132 RH |
1157 | } |
1158 | ||
1159 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1160 | if (ebd->elf_backend_symbol_processing) |
1161 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1162 | } |
1163 | } | |
1164 | ||
1165 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1166 | if (ebd->elf_backend_symbol_table_processing) |
1167 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1168 | |
1169 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1170 | ||
1171 | symcount = sym - symbase; | |
1172 | ||
1173 | /* Fill in the user's symbol pointer vector if needed. */ | |
1174 | if (symptrs) | |
1175 | { | |
1176 | long l = symcount; | |
1177 | ||
1178 | sym = symbase; | |
1179 | while (l-- > 0) | |
1180 | { | |
1181 | *symptrs++ = &sym->symbol; | |
1182 | sym++; | |
1183 | } | |
1184 | *symptrs = 0; /* Final null pointer */ | |
1185 | } | |
1186 | ||
6cdc0ccc AM |
1187 | if (xverbuf != NULL) |
1188 | free (xverbuf); | |
1189 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1190 | free (isymbuf); | |
252b5132 | 1191 | return symcount; |
9ad5cbcf | 1192 | |
252b5132 | 1193 | error_return: |
6cdc0ccc AM |
1194 | if (xverbuf != NULL) |
1195 | free (xverbuf); | |
1196 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1197 | free (isymbuf); | |
252b5132 RH |
1198 | return -1; |
1199 | } | |
1200 | ||
5c799c07 | 1201 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1202 | them. */ |
252b5132 | 1203 | |
b34976b6 | 1204 | static bfd_boolean |
268b6b39 AM |
1205 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1206 | asection *asect, | |
1207 | Elf_Internal_Shdr *rel_hdr, | |
1208 | bfd_size_type reloc_count, | |
1209 | arelent *relents, | |
1210 | asymbol **symbols, | |
1211 | bfd_boolean dynamic) | |
252b5132 | 1212 | { |
9c5bfbb7 | 1213 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1214 | void *allocated = NULL; |
252b5132 | 1215 | bfd_byte *native_relocs; |
252b5132 RH |
1216 | arelent *relent; |
1217 | unsigned int i; | |
1218 | int entsize; | |
5ad8645c | 1219 | unsigned int symcount; |
252b5132 | 1220 | |
268b6b39 | 1221 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1222 | if (allocated == NULL) |
1223 | goto error_return; | |
1224 | ||
1225 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1226 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1227 | != rel_hdr->sh_size)) |
1228 | goto error_return; | |
1229 | ||
268b6b39 | 1230 | native_relocs = allocated; |
252b5132 | 1231 | |
252b5132 RH |
1232 | entsize = rel_hdr->sh_entsize; |
1233 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1234 | || entsize == sizeof (Elf_External_Rela)); | |
1235 | ||
5ad8645c AM |
1236 | if (dynamic) |
1237 | symcount = bfd_get_dynamic_symcount (abfd); | |
1238 | else | |
1239 | symcount = bfd_get_symcount (abfd); | |
1240 | ||
252b5132 RH |
1241 | for (i = 0, relent = relents; |
1242 | i < reloc_count; | |
1243 | i++, relent++, native_relocs += entsize) | |
1244 | { | |
1245 | Elf_Internal_Rela rela; | |
252b5132 RH |
1246 | |
1247 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1248 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1249 | else |
947216bf | 1250 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1251 | |
1252 | /* The address of an ELF reloc is section relative for an object | |
1253 | file, and absolute for an executable file or shared library. | |
1254 | The address of a normal BFD reloc is always section relative, | |
1255 | and the address of a dynamic reloc is absolute.. */ | |
1256 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1257 | relent->address = rela.r_offset; | |
1258 | else | |
1259 | relent->address = rela.r_offset - asect->vma; | |
1260 | ||
1261 | if (ELF_R_SYM (rela.r_info) == 0) | |
1262 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1263 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1264 | { |
1265 | (*_bfd_error_handler) | |
1266 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1267 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1268 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1269 | } | |
252b5132 RH |
1270 | else |
1271 | { | |
1272 | asymbol **ps, *s; | |
1273 | ||
1274 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; | |
1275 | s = *ps; | |
1276 | ||
f9cfae62 | 1277 | relent->sym_ptr_ptr = ps; |
252b5132 RH |
1278 | } |
1279 | ||
1280 | relent->addend = rela.r_addend; | |
1281 | ||
90fff0d4 DJ |
1282 | if ((entsize == sizeof (Elf_External_Rela) |
1283 | && ebd->elf_info_to_howto != NULL) | |
1284 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1285 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1286 | else | |
947216bf | 1287 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1288 | } |
1289 | ||
252b5132 RH |
1290 | if (allocated != NULL) |
1291 | free (allocated); | |
1292 | ||
b34976b6 | 1293 | return TRUE; |
252b5132 RH |
1294 | |
1295 | error_return: | |
1296 | if (allocated != NULL) | |
1297 | free (allocated); | |
b34976b6 | 1298 | return FALSE; |
252b5132 RH |
1299 | } |
1300 | ||
42fdc509 MM |
1301 | /* Read in and swap the external relocs. */ |
1302 | ||
b34976b6 | 1303 | bfd_boolean |
268b6b39 AM |
1304 | elf_slurp_reloc_table (bfd *abfd, |
1305 | asection *asect, | |
1306 | asymbol **symbols, | |
1307 | bfd_boolean dynamic) | |
42fdc509 MM |
1308 | { |
1309 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1310 | Elf_Internal_Shdr *rel_hdr; | |
1311 | Elf_Internal_Shdr *rel_hdr2; | |
1312 | bfd_size_type reloc_count; | |
1313 | bfd_size_type reloc_count2; | |
1314 | arelent *relents; | |
dc810e39 | 1315 | bfd_size_type amt; |
42fdc509 MM |
1316 | |
1317 | if (asect->relocation != NULL) | |
b34976b6 | 1318 | return TRUE; |
42fdc509 MM |
1319 | |
1320 | if (! dynamic) | |
1321 | { | |
1322 | if ((asect->flags & SEC_RELOC) == 0 | |
1323 | || asect->reloc_count == 0) | |
b34976b6 | 1324 | return TRUE; |
42fdc509 MM |
1325 | |
1326 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1327 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1328 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1329 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1330 | |
1331 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1332 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1333 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1334 | ||
1335 | } | |
1336 | else | |
1337 | { | |
57e21bef MM |
1338 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1339 | case because relocations against this section may use the | |
1340 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1341 | in elf.c does not update the RELOC_COUNT. */ | |
eea6121a | 1342 | if (asect->size == 0) |
b34976b6 | 1343 | return TRUE; |
42fdc509 MM |
1344 | |
1345 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1346 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1347 | rel_hdr2 = NULL; |
57e21bef | 1348 | reloc_count2 = 0; |
42fdc509 MM |
1349 | } |
1350 | ||
dc810e39 | 1351 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
268b6b39 | 1352 | relents = bfd_alloc (abfd, amt); |
42fdc509 | 1353 | if (relents == NULL) |
b34976b6 | 1354 | return FALSE; |
42fdc509 MM |
1355 | |
1356 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1357 | rel_hdr, reloc_count, | |
1358 | relents, | |
1359 | symbols, dynamic)) | |
b34976b6 | 1360 | return FALSE; |
60bcf0fa NC |
1361 | |
1362 | if (rel_hdr2 | |
42fdc509 MM |
1363 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1364 | rel_hdr2, reloc_count2, | |
1365 | relents + reloc_count, | |
1366 | symbols, dynamic)) | |
b34976b6 | 1367 | return FALSE; |
42fdc509 | 1368 | |
42fdc509 | 1369 | asect->relocation = relents; |
b34976b6 | 1370 | return TRUE; |
42fdc509 MM |
1371 | } |
1372 | ||
252b5132 RH |
1373 | #ifdef DEBUG |
1374 | static void | |
268b6b39 | 1375 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1376 | { |
1377 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1378 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1379 | (long) hdr); | |
1380 | fprintf (stderr, | |
1381 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1382 | (long) hdr->sh_name, | |
1383 | (long) hdr->sh_type, | |
1384 | (long) hdr->sh_flags); | |
1385 | fprintf (stderr, | |
1386 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1387 | (long) hdr->sh_addr, | |
1388 | (long) hdr->sh_offset, | |
1389 | (long) hdr->sh_size); | |
1390 | fprintf (stderr, | |
1391 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1392 | (long) hdr->sh_link, | |
1393 | (long) hdr->sh_info, | |
1394 | (long) hdr->sh_addralign); | |
1395 | fprintf (stderr, "sh_entsize = %ld\n", | |
1396 | (long) hdr->sh_entsize); | |
1397 | fflush (stderr); | |
1398 | } | |
1399 | ||
1400 | static void | |
268b6b39 | 1401 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1402 | { |
1403 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1404 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1405 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1406 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1407 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1408 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1409 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1410 | } | |
1411 | ||
1412 | static char * | |
268b6b39 | 1413 | elf_symbol_flags (flagword flags) |
252b5132 RH |
1414 | { |
1415 | static char buffer[1024]; | |
1416 | ||
1417 | buffer[0] = '\0'; | |
1418 | if (flags & BSF_LOCAL) | |
1419 | strcat (buffer, " local"); | |
1420 | ||
1421 | if (flags & BSF_GLOBAL) | |
1422 | strcat (buffer, " global"); | |
1423 | ||
1424 | if (flags & BSF_DEBUGGING) | |
1425 | strcat (buffer, " debug"); | |
1426 | ||
1427 | if (flags & BSF_FUNCTION) | |
1428 | strcat (buffer, " function"); | |
1429 | ||
1430 | if (flags & BSF_KEEP) | |
1431 | strcat (buffer, " keep"); | |
1432 | ||
1433 | if (flags & BSF_KEEP_G) | |
1434 | strcat (buffer, " keep_g"); | |
1435 | ||
1436 | if (flags & BSF_WEAK) | |
1437 | strcat (buffer, " weak"); | |
1438 | ||
1439 | if (flags & BSF_SECTION_SYM) | |
1440 | strcat (buffer, " section-sym"); | |
1441 | ||
1442 | if (flags & BSF_OLD_COMMON) | |
1443 | strcat (buffer, " old-common"); | |
1444 | ||
1445 | if (flags & BSF_NOT_AT_END) | |
1446 | strcat (buffer, " not-at-end"); | |
1447 | ||
1448 | if (flags & BSF_CONSTRUCTOR) | |
1449 | strcat (buffer, " constructor"); | |
1450 | ||
1451 | if (flags & BSF_WARNING) | |
1452 | strcat (buffer, " warning"); | |
1453 | ||
1454 | if (flags & BSF_INDIRECT) | |
1455 | strcat (buffer, " indirect"); | |
1456 | ||
1457 | if (flags & BSF_FILE) | |
1458 | strcat (buffer, " file"); | |
1459 | ||
1460 | if (flags & DYNAMIC) | |
1461 | strcat (buffer, " dynamic"); | |
1462 | ||
1463 | if (flags & ~(BSF_LOCAL | |
1464 | | BSF_GLOBAL | |
1465 | | BSF_DEBUGGING | |
1466 | | BSF_FUNCTION | |
1467 | | BSF_KEEP | |
1468 | | BSF_KEEP_G | |
1469 | | BSF_WEAK | |
1470 | | BSF_SECTION_SYM | |
1471 | | BSF_OLD_COMMON | |
1472 | | BSF_NOT_AT_END | |
1473 | | BSF_CONSTRUCTOR | |
1474 | | BSF_WARNING | |
1475 | | BSF_INDIRECT | |
1476 | | BSF_FILE | |
1477 | | BSF_DYNAMIC)) | |
1478 | strcat (buffer, " unknown-bits"); | |
1479 | ||
1480 | return buffer; | |
1481 | } | |
1482 | #endif | |
1483 | \f | |
8d6337fe RM |
1484 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1485 | reconstruct an ELF file by reading the segments out of remote memory | |
1486 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1487 | points to. If not null, *LOADBASEP is filled in with the difference | |
1488 | between the VMAs from which the segments were read, and the VMAs the | |
1489 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1490 | ||
1491 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1492 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1493 | should return zero on success or an `errno' code on failure. TEMPL must | |
1494 | be a BFD for a target with the word size and byte order found in the | |
1495 | remote memory. */ | |
1496 | ||
1497 | bfd * | |
268b6b39 AM |
1498 | NAME(_bfd_elf,bfd_from_remote_memory) |
1499 | (bfd *templ, | |
1500 | bfd_vma ehdr_vma, | |
1501 | bfd_vma *loadbasep, | |
f075ee0c | 1502 | int (*target_read_memory) (bfd_vma, bfd_byte *, int)) |
8d6337fe RM |
1503 | { |
1504 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1505 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1506 | Elf_External_Phdr *x_phdrs; | |
1507 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1508 | bfd *nbfd; | |
1509 | struct bfd_in_memory *bim; | |
1510 | int contents_size; | |
f075ee0c | 1511 | bfd_byte *contents; |
8d6337fe RM |
1512 | int err; |
1513 | unsigned int i; | |
1514 | bfd_vma loadbase; | |
1515 | ||
1516 | /* Read in the ELF header in external format. */ | |
f075ee0c | 1517 | err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr); |
8d6337fe RM |
1518 | if (err) |
1519 | { | |
1520 | bfd_set_error (bfd_error_system_call); | |
1521 | errno = err; | |
1522 | return NULL; | |
1523 | } | |
1524 | ||
1525 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1526 | make use of. The magic number must match, the address size ('class') | |
1527 | and byte-swapping must match our XVEC entry. */ | |
1528 | ||
1529 | if (! elf_file_p (&x_ehdr) | |
1530 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1531 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1532 | { | |
1533 | bfd_set_error (bfd_error_wrong_format); | |
1534 | return NULL; | |
1535 | } | |
1536 | ||
1537 | /* Check that file's byte order matches xvec's */ | |
1538 | switch (x_ehdr.e_ident[EI_DATA]) | |
1539 | { | |
1540 | case ELFDATA2MSB: /* Big-endian */ | |
1541 | if (! bfd_header_big_endian (templ)) | |
1542 | { | |
1543 | bfd_set_error (bfd_error_wrong_format); | |
1544 | return NULL; | |
1545 | } | |
1546 | break; | |
1547 | case ELFDATA2LSB: /* Little-endian */ | |
1548 | if (! bfd_header_little_endian (templ)) | |
1549 | { | |
1550 | bfd_set_error (bfd_error_wrong_format); | |
1551 | return NULL; | |
1552 | } | |
1553 | break; | |
1554 | case ELFDATANONE: /* No data encoding specified */ | |
1555 | default: /* Unknown data encoding specified */ | |
1556 | bfd_set_error (bfd_error_wrong_format); | |
1557 | return NULL; | |
1558 | } | |
1559 | ||
1560 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1561 | ||
1562 | /* The file header tells where to find the program headers. | |
1563 | These are what we use to actually choose what to read. */ | |
1564 | ||
1565 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1566 | { | |
1567 | bfd_set_error (bfd_error_wrong_format); | |
1568 | return NULL; | |
1569 | } | |
1570 | ||
268b6b39 | 1571 | x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); |
8d6337fe RM |
1572 | if (x_phdrs == NULL) |
1573 | { | |
1574 | bfd_set_error (bfd_error_no_memory); | |
1575 | return NULL; | |
1576 | } | |
f075ee0c | 1577 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs, |
8d6337fe RM |
1578 | i_ehdr.e_phnum * sizeof x_phdrs[0]); |
1579 | if (err) | |
1580 | { | |
1581 | free (x_phdrs); | |
1582 | bfd_set_error (bfd_error_system_call); | |
1583 | errno = err; | |
1584 | return NULL; | |
1585 | } | |
1586 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1587 | ||
1588 | contents_size = 0; | |
1589 | last_phdr = NULL; | |
1590 | loadbase = ehdr_vma; | |
1591 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1592 | { | |
1593 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
1594 | if (i_phdrs[i].p_type == PT_LOAD) | |
1595 | { | |
1596 | bfd_vma segment_end; | |
1597 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1598 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1599 | if (segment_end > (bfd_vma) contents_size) | |
1600 | contents_size = segment_end; | |
1601 | ||
1602 | if ((i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1603 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1604 | ||
1605 | last_phdr = &i_phdrs[i]; | |
1606 | } | |
1607 | } | |
1608 | if (last_phdr == NULL) | |
1609 | { | |
1610 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1611 | free (x_phdrs); | |
1612 | bfd_set_error (bfd_error_wrong_format); | |
1613 | return NULL; | |
1614 | } | |
1615 | ||
1616 | /* Trim the last segment so we don't bother with zeros in the last page | |
1617 | that are off the end of the file. However, if the extra bit in that | |
1618 | page includes the section headers, keep them. */ | |
1619 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1620 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1621 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1622 | { | |
1623 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1624 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1625 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1626 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1627 | } | |
1628 | else | |
1629 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1630 | ||
1631 | /* Now we know the size of the whole image we want read in. */ | |
268b6b39 | 1632 | contents = bfd_zmalloc (contents_size); |
8d6337fe RM |
1633 | if (contents == NULL) |
1634 | { | |
1635 | free (x_phdrs); | |
1636 | bfd_set_error (bfd_error_no_memory); | |
1637 | return NULL; | |
1638 | } | |
1639 | ||
1640 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1641 | if (i_phdrs[i].p_type == PT_LOAD) | |
1642 | { | |
1643 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1644 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1645 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1646 | if (end > (bfd_vma) contents_size) | |
1647 | end = contents_size; | |
1648 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1649 | & -i_phdrs[i].p_align, | |
1650 | contents + start, end - start); | |
1651 | if (err) | |
1652 | { | |
1653 | free (x_phdrs); | |
1654 | free (contents); | |
1655 | bfd_set_error (bfd_error_system_call); | |
1656 | errno = err; | |
1657 | return NULL; | |
1658 | } | |
1659 | } | |
1660 | free (x_phdrs); | |
1661 | ||
1662 | /* If the segments visible in memory didn't include the section headers, | |
1663 | then clear them from the file header. */ | |
1664 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1665 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1666 | { | |
1667 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1668 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1669 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1670 | } | |
1671 | ||
1672 | /* This will normally have been in the first PT_LOAD segment. But it | |
1673 | conceivably could be missing, and we might have just changed it. */ | |
1674 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1675 | ||
1676 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
268b6b39 | 1677 | bim = bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1678 | if (bim == NULL) |
1679 | { | |
1680 | free (contents); | |
1681 | bfd_set_error (bfd_error_no_memory); | |
1682 | return NULL; | |
1683 | } | |
1684 | nbfd = _bfd_new_bfd (); | |
1685 | if (nbfd == NULL) | |
1686 | { | |
1687 | free (bim); | |
1688 | free (contents); | |
1689 | bfd_set_error (bfd_error_no_memory); | |
1690 | return NULL; | |
1691 | } | |
1692 | nbfd->filename = "<in-memory>"; | |
1693 | nbfd->xvec = templ->xvec; | |
1694 | bim->size = contents_size; | |
1695 | bim->buffer = contents; | |
268b6b39 | 1696 | nbfd->iostream = bim; |
8d6337fe RM |
1697 | nbfd->flags = BFD_IN_MEMORY; |
1698 | nbfd->direction = read_direction; | |
1699 | nbfd->mtime = time (NULL); | |
1700 | nbfd->mtime_set = TRUE; | |
1701 | ||
1702 | if (loadbasep) | |
1703 | *loadbasep = loadbase; | |
1704 | return nbfd; | |
1705 | } | |
1706 | \f | |
252b5132 | 1707 | #include "elfcore.h" |
252b5132 RH |
1708 | \f |
1709 | /* Size-dependent data and functions. */ | |
1710 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1711 | sizeof (Elf_External_Ehdr), | |
1712 | sizeof (Elf_External_Phdr), | |
1713 | sizeof (Elf_External_Shdr), | |
1714 | sizeof (Elf_External_Rel), | |
1715 | sizeof (Elf_External_Rela), | |
1716 | sizeof (Elf_External_Sym), | |
1717 | sizeof (Elf_External_Dyn), | |
1718 | sizeof (Elf_External_Note), | |
70bcb145 | 1719 | 4, |
c7ac6ff8 | 1720 | 1, |
45d6a902 | 1721 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1722 | ELFCLASS, EV_CURRENT, |
1723 | elf_write_out_phdrs, | |
1724 | elf_write_shdrs_and_ehdr, | |
b9f66672 | 1725 | elf_write_relocs, |
73ff0d56 | 1726 | elf_swap_symbol_in, |
252b5132 RH |
1727 | elf_swap_symbol_out, |
1728 | elf_slurp_reloc_table, | |
1729 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1730 | elf_swap_dyn_in, |
1731 | elf_swap_dyn_out, | |
947216bf AM |
1732 | elf_swap_reloc_in, |
1733 | elf_swap_reloc_out, | |
1734 | elf_swap_reloca_in, | |
1735 | elf_swap_reloca_out | |
252b5132 | 1736 | }; |