Commit | Line | Data |
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252b5132 | 1 | /* ELF executable support for BFD. |
7898deda | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
45d6a902 | 3 | 2001, 2002, 2003 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) | |
108 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
109 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
110 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
111 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
112 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
113 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
114 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
115 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
116 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
117 | #define elf_find_section NAME(bfd_elf,find_section) | |
252b5132 RH |
118 | #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr) |
119 | #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs) | |
b9f66672 JL |
120 | #define elf_write_relocs NAME(bfd_elf,write_relocs) |
121 | #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table) | |
252b5132 RH |
122 | |
123 | #if ARCH_SIZE == 64 | |
124 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
125 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
126 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
127 | #define ELFCLASS ELFCLASS64 | |
128 | #define FILE_ALIGN 8 | |
129 | #define LOG_FILE_ALIGN 3 | |
130 | #endif | |
131 | #if ARCH_SIZE == 32 | |
132 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
133 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
134 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
135 | #define ELFCLASS ELFCLASS32 | |
136 | #define FILE_ALIGN 4 | |
137 | #define LOG_FILE_ALIGN 2 | |
138 | #endif | |
139 | ||
252b5132 | 140 | #ifdef DEBUG |
268b6b39 AM |
141 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
142 | static void elf_debug_file (Elf_Internal_Ehdr *); | |
143 | static char *elf_symbol_flags (flagword); | |
252b5132 RH |
144 | #endif |
145 | \f | |
146 | /* Structure swapping routines */ | |
147 | ||
148 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
149 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
150 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
151 | #define H_PUT_WORD H_PUT_64 |
152 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
153 | #define H_GET_WORD H_GET_64 | |
154 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
155 | #endif |
156 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
157 | #define H_PUT_WORD H_PUT_32 |
158 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
159 | #define H_GET_WORD H_GET_32 | |
160 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
161 | #endif |
162 | ||
163 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 164 | format. */ |
252b5132 RH |
165 | |
166 | void | |
268b6b39 AM |
167 | elf_swap_symbol_in (bfd *abfd, |
168 | const void *psrc, | |
169 | const void *pshn, | |
170 | Elf_Internal_Sym *dst) | |
252b5132 | 171 | { |
268b6b39 AM |
172 | const Elf_External_Sym *src = psrc; |
173 | const Elf_External_Sym_Shndx *shndx = pshn; | |
86dc0f79 RH |
174 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
175 | ||
dc810e39 | 176 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 177 | if (signed_vma) |
dc810e39 | 178 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 179 | else |
dc810e39 AM |
180 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
181 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
182 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
183 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
184 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
9ad5cbcf AM |
185 | if (dst->st_shndx == SHN_XINDEX) |
186 | { | |
187 | if (shndx == NULL) | |
188 | abort (); | |
189 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); | |
190 | } | |
252b5132 RH |
191 | } |
192 | ||
193 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 194 | format. */ |
252b5132 RH |
195 | |
196 | void | |
268b6b39 AM |
197 | elf_swap_symbol_out (bfd *abfd, |
198 | const Elf_Internal_Sym *src, | |
199 | void *cdst, | |
200 | void *shndx) | |
252b5132 | 201 | { |
9ad5cbcf | 202 | unsigned int tmp; |
268b6b39 | 203 | Elf_External_Sym *dst = cdst; |
dc810e39 AM |
204 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
205 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
206 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
207 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
208 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf AM |
209 | tmp = src->st_shndx; |
210 | if (tmp > SHN_HIRESERVE) | |
211 | { | |
212 | if (shndx == NULL) | |
213 | abort (); | |
214 | H_PUT_32 (abfd, tmp, shndx); | |
215 | tmp = SHN_XINDEX; | |
216 | } | |
217 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
218 | } |
219 | ||
252b5132 | 220 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 221 | internal format. */ |
252b5132 RH |
222 | |
223 | static void | |
268b6b39 AM |
224 | elf_swap_ehdr_in (bfd *abfd, |
225 | const Elf_External_Ehdr *src, | |
226 | Elf_Internal_Ehdr *dst) | |
252b5132 | 227 | { |
448cafa4 | 228 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 229 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
230 | dst->e_type = H_GET_16 (abfd, src->e_type); |
231 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
232 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 233 | if (signed_vma) |
dc810e39 | 234 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 235 | else |
dc810e39 AM |
236 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
237 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
238 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
239 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
240 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
241 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
242 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
243 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
244 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
245 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
246 | } |
247 | ||
248 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 249 | external format. */ |
252b5132 RH |
250 | |
251 | static void | |
268b6b39 AM |
252 | elf_swap_ehdr_out (bfd *abfd, |
253 | const Elf_Internal_Ehdr *src, | |
254 | Elf_External_Ehdr *dst) | |
252b5132 | 255 | { |
5732c114 | 256 | unsigned int tmp; |
448cafa4 | 257 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 258 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 259 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
260 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
261 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
262 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 263 | if (signed_vma) |
dc810e39 | 264 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 265 | else |
dc810e39 AM |
266 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
267 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
268 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
269 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
270 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
271 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
272 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
273 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 AM |
274 | tmp = src->e_shnum; |
275 | if (tmp >= SHN_LORESERVE) | |
276 | tmp = SHN_UNDEF; | |
277 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
278 | tmp = src->e_shstrndx; | |
279 | if (tmp >= SHN_LORESERVE) | |
280 | tmp = SHN_XINDEX; | |
281 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); | |
252b5132 RH |
282 | } |
283 | ||
252b5132 | 284 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 285 | ELF section header table entry in internal format. */ |
252b5132 RH |
286 | |
287 | static void | |
268b6b39 AM |
288 | elf_swap_shdr_in (bfd *abfd, |
289 | const Elf_External_Shdr *src, | |
290 | Elf_Internal_Shdr *dst) | |
252b5132 | 291 | { |
86dc0f79 RH |
292 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
293 | ||
dc810e39 AM |
294 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
295 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
296 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 297 | if (signed_vma) |
dc810e39 | 298 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 299 | else |
dc810e39 AM |
300 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
301 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
302 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
303 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
304 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
305 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
306 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
307 | dst->bfd_section = NULL; |
308 | dst->contents = NULL; | |
309 | } | |
310 | ||
311 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 312 | ELF section header table entry in external format. */ |
252b5132 RH |
313 | |
314 | static void | |
268b6b39 AM |
315 | elf_swap_shdr_out (bfd *abfd, |
316 | const Elf_Internal_Shdr *src, | |
317 | Elf_External_Shdr *dst) | |
252b5132 | 318 | { |
3e932841 | 319 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
320 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
321 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
322 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
323 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
324 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
325 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
326 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
327 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
328 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
329 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
330 | } |
331 | ||
252b5132 | 332 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 333 | ELF program header table entry in internal format. */ |
252b5132 RH |
334 | |
335 | void | |
268b6b39 AM |
336 | elf_swap_phdr_in (bfd *abfd, |
337 | const Elf_External_Phdr *src, | |
338 | Elf_Internal_Phdr *dst) | |
252b5132 | 339 | { |
86dc0f79 RH |
340 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
341 | ||
dc810e39 AM |
342 | dst->p_type = H_GET_32 (abfd, src->p_type); |
343 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
344 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
345 | if (signed_vma) |
346 | { | |
dc810e39 AM |
347 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
348 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
349 | } |
350 | else | |
351 | { | |
dc810e39 AM |
352 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
353 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 354 | } |
dc810e39 AM |
355 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
356 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
357 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
358 | } |
359 | ||
360 | void | |
268b6b39 AM |
361 | elf_swap_phdr_out (bfd *abfd, |
362 | const Elf_Internal_Phdr *src, | |
363 | Elf_External_Phdr *dst) | |
252b5132 | 364 | { |
3e932841 | 365 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
366 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
367 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
368 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
369 | H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr); | |
370 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); | |
371 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
372 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
373 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
374 | } |
375 | ||
3e932841 | 376 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 377 | void |
268b6b39 AM |
378 | elf_swap_reloc_in (bfd *abfd, |
379 | const bfd_byte *s, | |
380 | Elf_Internal_Rela *dst) | |
252b5132 | 381 | { |
947216bf | 382 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
383 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
384 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 385 | dst->r_addend = 0; |
252b5132 RH |
386 | } |
387 | ||
947216bf | 388 | void |
268b6b39 AM |
389 | elf_swap_reloca_in (bfd *abfd, |
390 | const bfd_byte *s, | |
391 | Elf_Internal_Rela *dst) | |
252b5132 | 392 | { |
947216bf | 393 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
394 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
395 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
396 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
397 | } |
398 | ||
3e932841 | 399 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 400 | void |
268b6b39 AM |
401 | elf_swap_reloc_out (bfd *abfd, |
402 | const Elf_Internal_Rela *src, | |
403 | bfd_byte *d) | |
252b5132 | 404 | { |
947216bf | 405 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
406 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
407 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
408 | } |
409 | ||
947216bf | 410 | void |
268b6b39 AM |
411 | elf_swap_reloca_out (bfd *abfd, |
412 | const Elf_Internal_Rela *src, | |
413 | bfd_byte *d) | |
252b5132 | 414 | { |
947216bf | 415 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
416 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
417 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
418 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
419 | } |
420 | ||
268b6b39 AM |
421 | void |
422 | elf_swap_dyn_in (bfd *abfd, | |
423 | const void *p, | |
424 | Elf_Internal_Dyn *dst) | |
252b5132 | 425 | { |
268b6b39 | 426 | const Elf_External_Dyn *src = p; |
252b5132 | 427 | |
dc810e39 AM |
428 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
429 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
430 | } |
431 | ||
268b6b39 AM |
432 | void |
433 | elf_swap_dyn_out (bfd *abfd, | |
434 | const Elf_Internal_Dyn *src, | |
435 | void *p) | |
252b5132 | 436 | { |
268b6b39 | 437 | Elf_External_Dyn *dst = p; |
c7ac6ff8 | 438 | |
dc810e39 AM |
439 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
440 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
441 | } |
442 | \f | |
443 | /* ELF .o/exec file reading */ | |
444 | ||
252b5132 RH |
445 | /* Begin processing a given object. |
446 | ||
447 | First we validate the file by reading in the ELF header and checking | |
448 | the magic number. */ | |
449 | ||
268b6b39 AM |
450 | static inline bfd_boolean |
451 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
452 | { |
453 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
454 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
455 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
456 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
457 | } | |
458 | ||
459 | /* Check to see if the file associated with ABFD matches the target vector | |
460 | that ABFD points to. | |
461 | ||
462 | Note that we may be called several times with the same ABFD, but different | |
463 | target vectors, most of which will not match. We have to avoid leaving | |
464 | any side effects in ABFD, or any data it points to (like tdata), if the | |
465 | file does not match the target vector. */ | |
466 | ||
467 | const bfd_target * | |
268b6b39 | 468 | elf_object_p (bfd *abfd) |
252b5132 RH |
469 | { |
470 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
471 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
472 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 473 | Elf_Internal_Shdr i_shdr; |
ed591155 | 474 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 RH |
475 | unsigned int shindex; |
476 | char *shstrtab; /* Internal copy of section header stringtab */ | |
9c5bfbb7 | 477 | const struct elf_backend_data *ebd; |
ed591155 | 478 | struct bfd_preserve preserve; |
252b5132 | 479 | asection *s; |
dc810e39 | 480 | bfd_size_type amt; |
252b5132 | 481 | |
e84d6fca | 482 | preserve.marker = NULL; |
a17cc40f | 483 | |
252b5132 RH |
484 | /* Read in the ELF header in external format. */ |
485 | ||
268b6b39 | 486 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
487 | { |
488 | if (bfd_get_error () != bfd_error_system_call) | |
489 | goto got_wrong_format_error; | |
490 | else | |
491 | goto got_no_match; | |
492 | } | |
493 | ||
494 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
495 | make use of. The magic number must match, the address size ('class') | |
496 | and byte-swapping must match our XVEC entry, and it must have a | |
497 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 498 | file). */ |
252b5132 | 499 | |
82e51918 AM |
500 | if (! elf_file_p (&x_ehdr) |
501 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
502 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
503 | goto got_wrong_format_error; |
504 | ||
505 | /* Check that file's byte order matches xvec's */ | |
506 | switch (x_ehdr.e_ident[EI_DATA]) | |
507 | { | |
508 | case ELFDATA2MSB: /* Big-endian */ | |
509 | if (! bfd_header_big_endian (abfd)) | |
510 | goto got_wrong_format_error; | |
511 | break; | |
512 | case ELFDATA2LSB: /* Little-endian */ | |
513 | if (! bfd_header_little_endian (abfd)) | |
514 | goto got_wrong_format_error; | |
515 | break; | |
516 | case ELFDATANONE: /* No data encoding specified */ | |
517 | default: /* Unknown data encoding specified */ | |
518 | goto got_wrong_format_error; | |
519 | } | |
520 | ||
0c83546a AM |
521 | if (!bfd_preserve_save (abfd, &preserve)) |
522 | goto got_no_match; | |
523 | ||
252b5132 RH |
524 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
525 | the tdata pointer in the bfd. */ | |
526 | ||
0c83546a | 527 | if (! (*abfd->xvec->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 528 | goto got_no_match; |
0c83546a | 529 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 530 | |
252b5132 RH |
531 | /* Now that we know the byte order, swap in the rest of the header */ |
532 | i_ehdrp = elf_elfheader (abfd); | |
533 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
534 | #if DEBUG & 1 | |
535 | elf_debug_file (i_ehdrp); | |
536 | #endif | |
537 | ||
538 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
539 | if (i_ehdrp->e_type == ET_CORE) | |
540 | goto got_wrong_format_error; | |
541 | ||
0c35f01a AM |
542 | /* If this is a relocatable file and there is no section header |
543 | table, then we're hosed. */ | |
544 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
545 | goto got_wrong_format_error; |
546 | ||
547 | /* As a simple sanity check, verify that the what BFD thinks is the | |
548 | size of each section header table entry actually matches the size | |
0c35f01a AM |
549 | recorded in the file, but only if there are any sections. */ |
550 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
551 | goto got_wrong_format_error; |
552 | ||
7ece0d85 JJ |
553 | /* Further sanity check. */ |
554 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
555 | goto got_wrong_format_error; | |
556 | ||
252b5132 RH |
557 | ebd = get_elf_backend_data (abfd); |
558 | ||
559 | /* Check that the ELF e_machine field matches what this particular | |
560 | BFD format expects. */ | |
561 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
562 | && (ebd->elf_machine_alt1 == 0 |
563 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
564 | && (ebd->elf_machine_alt2 == 0 | |
565 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 RH |
566 | { |
567 | const bfd_target * const *target_ptr; | |
568 | ||
569 | if (ebd->elf_machine_code != EM_NONE) | |
570 | goto got_wrong_format_error; | |
571 | ||
572 | /* This is the generic ELF target. Let it match any ELF target | |
573 | for which we do not have a specific backend. */ | |
574 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
575 | { | |
9c5bfbb7 | 576 | const struct elf_backend_data *back; |
252b5132 RH |
577 | |
578 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
579 | continue; | |
9c5bfbb7 | 580 | back = (const struct elf_backend_data *) (*target_ptr)->backend_data; |
252b5132 RH |
581 | if (back->elf_machine_code == i_ehdrp->e_machine |
582 | || (back->elf_machine_alt1 != 0 | |
583 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
584 | || (back->elf_machine_alt2 != 0 | |
585 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
586 | { | |
587 | /* target_ptr is an ELF backend which matches this | |
588 | object file, so reject the generic ELF target. */ | |
589 | goto got_wrong_format_error; | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
594 | if (i_ehdrp->e_type == ET_EXEC) | |
595 | abfd->flags |= EXEC_P; | |
596 | else if (i_ehdrp->e_type == ET_DYN) | |
597 | abfd->flags |= DYNAMIC; | |
598 | ||
599 | if (i_ehdrp->e_phnum > 0) | |
600 | abfd->flags |= D_PAGED; | |
601 | ||
602 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
603 | { | |
604 | /* It's OK if this fails for the generic target. */ | |
605 | if (ebd->elf_machine_code != EM_NONE) | |
606 | goto got_no_match; | |
607 | } | |
608 | ||
3e932841 | 609 | /* Remember the entry point specified in the ELF file header. */ |
448cafa4 | 610 | bfd_set_start_address (abfd, i_ehdrp->e_entry); |
252b5132 | 611 | |
7ece0d85 JJ |
612 | if (i_ehdrp->e_shoff != 0) |
613 | { | |
614 | /* Seek to the section header table in the file. */ | |
615 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0) | |
616 | goto got_no_match; | |
5732c114 | 617 | |
7ece0d85 JJ |
618 | /* Read the first section header at index 0, and convert to internal |
619 | form. */ | |
268b6b39 | 620 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
621 | goto got_no_match; |
622 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 623 | |
7ece0d85 JJ |
624 | /* If the section count is zero, the actual count is in the first |
625 | section header. */ | |
626 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
627 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
5732c114 | 628 | |
7ece0d85 JJ |
629 | /* And similarly for the string table index. */ |
630 | if (i_ehdrp->e_shstrndx == SHN_XINDEX) | |
631 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
632 | } | |
5732c114 | 633 | |
252b5132 | 634 | /* Allocate space for a copy of the section header table in |
5732c114 | 635 | internal form. */ |
0c35f01a AM |
636 | if (i_ehdrp->e_shnum != 0) |
637 | { | |
5732c114 | 638 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 639 | unsigned int num_sec; |
5732c114 | 640 | |
0c35f01a | 641 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
268b6b39 | 642 | i_shdrp = bfd_alloc (abfd, amt); |
5732c114 AM |
643 | if (!i_shdrp) |
644 | goto got_no_match; | |
9ad5cbcf AM |
645 | num_sec = i_ehdrp->e_shnum; |
646 | if (num_sec > SHN_LORESERVE) | |
647 | num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
648 | elf_numsections (abfd) = num_sec; | |
649 | amt = sizeof (i_shdrp) * num_sec; | |
268b6b39 | 650 | elf_elfsections (abfd) = bfd_alloc (abfd, amt); |
5732c114 | 651 | if (!elf_elfsections (abfd)) |
0c35f01a | 652 | goto got_no_match; |
5732c114 AM |
653 | |
654 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
655 | shdrp = i_shdrp; | |
656 | shindex = 0; | |
9ad5cbcf | 657 | if (num_sec > SHN_LORESERVE) |
5732c114 AM |
658 | { |
659 | for ( ; shindex < SHN_LORESERVE; shindex++) | |
660 | elf_elfsections (abfd)[shindex] = shdrp++; | |
661 | for ( ; shindex < SHN_HIRESERVE + 1; shindex++) | |
9ad5cbcf | 662 | elf_elfsections (abfd)[shindex] = i_shdrp; |
5732c114 | 663 | } |
9ad5cbcf | 664 | for ( ; shindex < num_sec; shindex++) |
5732c114 | 665 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 666 | |
ed591155 AM |
667 | /* Read in the rest of the section header table and convert it |
668 | to internal form. */ | |
669 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
670 | { | |
268b6b39 | 671 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
672 | goto got_no_match; |
673 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
674 | ||
675 | /* If the section is loaded, but not page aligned, clear | |
676 | D_PAGED. */ | |
677 | if (i_shdrp[shindex].sh_size != 0 | |
678 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
679 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
680 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
681 | % ebd->maxpagesize) | |
682 | != 0)) | |
683 | abfd->flags &= ~D_PAGED; | |
684 | } | |
252b5132 | 685 | } |
ed591155 | 686 | |
7ece0d85 | 687 | if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff) |
252b5132 RH |
688 | { |
689 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) | |
690 | goto got_no_match; | |
691 | } | |
692 | ||
693 | /* Read in the program headers. */ | |
694 | if (i_ehdrp->e_phnum == 0) | |
695 | elf_tdata (abfd)->phdr = NULL; | |
696 | else | |
697 | { | |
698 | Elf_Internal_Phdr *i_phdr; | |
699 | unsigned int i; | |
700 | ||
dc810e39 | 701 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
268b6b39 | 702 | elf_tdata (abfd)->phdr = bfd_alloc (abfd, amt); |
252b5132 RH |
703 | if (elf_tdata (abfd)->phdr == NULL) |
704 | goto got_no_match; | |
dc810e39 | 705 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
706 | goto got_no_match; |
707 | i_phdr = elf_tdata (abfd)->phdr; | |
708 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
709 | { | |
710 | Elf_External_Phdr x_phdr; | |
711 | ||
268b6b39 | 712 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
713 | goto got_no_match; |
714 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
715 | } | |
716 | } | |
717 | ||
718 | /* Read in the string table containing the names of the sections. We | |
3e932841 | 719 | will need the base pointer to this table later. */ |
252b5132 RH |
720 | /* We read this inline now, so that we don't have to go through |
721 | bfd_section_from_shdr with it (since this particular strtab is | |
722 | used to find all of the ELF section names.) */ | |
723 | ||
7ece0d85 | 724 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff) |
252b5132 | 725 | { |
9ad5cbcf AM |
726 | unsigned int num_sec; |
727 | ||
0c35f01a AM |
728 | shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
729 | if (!shstrtab) | |
252b5132 | 730 | goto got_no_match; |
0c35f01a AM |
731 | |
732 | /* Once all of the section headers have been read and converted, we | |
733 | can start processing them. Note that the first section header is | |
734 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
735 | num_sec = elf_numsections (abfd); |
736 | for (shindex = 1; shindex < num_sec; shindex++) | |
0c35f01a AM |
737 | { |
738 | if (! bfd_section_from_shdr (abfd, shindex)) | |
739 | goto got_no_match; | |
9ad5cbcf AM |
740 | if (shindex == SHN_LORESERVE - 1) |
741 | shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
0c35f01a | 742 | } |
252b5132 RH |
743 | } |
744 | ||
745 | /* Let the backend double check the format and override global | |
746 | information. */ | |
747 | if (ebd->elf_backend_object_p) | |
748 | { | |
82e51918 | 749 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
750 | goto got_wrong_format_error; |
751 | } | |
752 | ||
753 | /* If we have created any reloc sections that are associated with | |
754 | debugging sections, mark the reloc sections as debugging as well. */ | |
755 | for (s = abfd->sections; s != NULL; s = s->next) | |
756 | { | |
757 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
758 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
759 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
760 | { | |
761 | unsigned long targ_index; | |
762 | asection *targ_sec; | |
763 | ||
764 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
765 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
766 | if (targ_sec != NULL | |
767 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
768 | s->flags |= SEC_DEBUGGING; | |
769 | } | |
770 | } | |
771 | ||
e84d6fca AM |
772 | bfd_preserve_finish (abfd, &preserve); |
773 | return abfd->xvec; | |
252b5132 RH |
774 | |
775 | got_wrong_format_error: | |
a77a9fef HPN |
776 | /* There is way too much undoing of half-known state here. The caller, |
777 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
778 | check match/no-match like it does. We have to rely on that a call to | |
779 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
780 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
781 | For this to work, only elf-data and the mach may be changed by the | |
782 | target-specific elf_backend_object_p function. Note that saving the | |
783 | whole bfd here and restoring it would be even worse; the first thing | |
784 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 785 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 786 | |
252b5132 | 787 | got_no_match: |
e84d6fca AM |
788 | if (preserve.marker != NULL) |
789 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 790 | return NULL; |
252b5132 RH |
791 | } |
792 | \f | |
793 | /* ELF .o/exec file writing */ | |
794 | ||
795 | /* Write out the relocs. */ | |
796 | ||
b9f66672 | 797 | void |
268b6b39 | 798 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 799 | { |
268b6b39 | 800 | bfd_boolean *failedp = data; |
252b5132 | 801 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 802 | bfd_vma addr_offset; |
c39a58e6 | 803 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
804 | size_t extsize; |
805 | bfd_byte *dst_rela; | |
252b5132 | 806 | unsigned int idx; |
947216bf AM |
807 | asymbol *last_sym; |
808 | int last_sym_idx; | |
252b5132 RH |
809 | |
810 | /* If we have already failed, don't do anything. */ | |
811 | if (*failedp) | |
812 | return; | |
813 | ||
814 | if ((sec->flags & SEC_RELOC) == 0) | |
815 | return; | |
816 | ||
817 | /* The linker backend writes the relocs out itself, and sets the | |
818 | reloc_count field to zero to inhibit writing them here. Also, | |
819 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
820 | relocs. */ | |
821 | if (sec->reloc_count == 0) | |
822 | return; | |
823 | ||
824 | rela_hdr = &elf_section_data (sec)->rel_hdr; | |
825 | ||
826 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
268b6b39 | 827 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
828 | if (rela_hdr->contents == NULL) |
829 | { | |
b34976b6 | 830 | *failedp = TRUE; |
252b5132 RH |
831 | return; |
832 | } | |
833 | ||
bf572ba0 MM |
834 | /* Figure out whether the relocations are RELA or REL relocations. */ |
835 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
836 | { |
837 | swap_out = elf_swap_reloca_out; | |
838 | extsize = sizeof (Elf_External_Rela); | |
839 | } | |
bf572ba0 | 840 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
841 | { |
842 | swap_out = elf_swap_reloc_out; | |
843 | extsize = sizeof (Elf_External_Rel); | |
844 | } | |
bf572ba0 MM |
845 | else |
846 | /* Every relocation section should be either an SHT_RELA or an | |
847 | SHT_REL section. */ | |
848 | abort (); | |
849 | ||
947216bf AM |
850 | /* The address of an ELF reloc is section relative for an object |
851 | file, and absolute for an executable file or shared library. | |
852 | The address of a BFD reloc is always section relative. */ | |
853 | addr_offset = 0; | |
854 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
855 | addr_offset = sec->vma; | |
856 | ||
3e932841 | 857 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
858 | last_sym = 0; |
859 | last_sym_idx = 0; | |
860 | dst_rela = rela_hdr->contents; | |
252b5132 | 861 | |
947216bf AM |
862 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
863 | { | |
864 | Elf_Internal_Rela src_rela; | |
865 | arelent *ptr; | |
866 | asymbol *sym; | |
867 | int n; | |
868 | ||
869 | ptr = sec->orelocation[idx]; | |
870 | sym = *ptr->sym_ptr_ptr; | |
871 | if (sym == last_sym) | |
872 | n = last_sym_idx; | |
873 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
874 | n = STN_UNDEF; | |
875 | else | |
252b5132 | 876 | { |
947216bf AM |
877 | last_sym = sym; |
878 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
879 | if (n < 0) | |
252b5132 | 880 | { |
b34976b6 | 881 | *failedp = TRUE; |
252b5132 RH |
882 | return; |
883 | } | |
947216bf | 884 | last_sym_idx = n; |
252b5132 | 885 | } |
252b5132 | 886 | |
947216bf AM |
887 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
888 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
889 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 890 | { |
b34976b6 | 891 | *failedp = TRUE; |
947216bf | 892 | return; |
252b5132 | 893 | } |
947216bf AM |
894 | |
895 | src_rela.r_offset = ptr->address + addr_offset; | |
896 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
897 | src_rela.r_addend = ptr->addend; | |
898 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
899 | } |
900 | } | |
901 | ||
902 | /* Write out the program headers. */ | |
903 | ||
904 | int | |
268b6b39 AM |
905 | elf_write_out_phdrs (bfd *abfd, |
906 | const Elf_Internal_Phdr *phdr, | |
907 | unsigned int count) | |
252b5132 RH |
908 | { |
909 | while (count--) | |
910 | { | |
911 | Elf_External_Phdr extphdr; | |
912 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
913 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
914 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
915 | return -1; |
916 | phdr++; | |
917 | } | |
918 | return 0; | |
919 | } | |
920 | ||
921 | /* Write out the section headers and the ELF file header. */ | |
922 | ||
b34976b6 | 923 | bfd_boolean |
268b6b39 | 924 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
925 | { |
926 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
927 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
928 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
929 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
930 | unsigned int count; | |
dc810e39 | 931 | bfd_size_type amt; |
252b5132 RH |
932 | |
933 | i_ehdrp = elf_elfheader (abfd); | |
934 | i_shdrp = elf_elfsections (abfd); | |
935 | ||
3e932841 | 936 | /* swap the header before spitting it out... */ |
252b5132 RH |
937 | |
938 | #if DEBUG & 1 | |
939 | elf_debug_file (i_ehdrp); | |
940 | #endif | |
941 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 942 | amt = sizeof (x_ehdr); |
252b5132 | 943 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 944 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 945 | return FALSE; |
252b5132 | 946 | |
5732c114 AM |
947 | /* Some fields in the first section header handle overflow of ehdr |
948 | fields. */ | |
949 | if (i_ehdrp->e_shnum >= SHN_LORESERVE) | |
950 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; | |
951 | if (i_ehdrp->e_shstrndx >= SHN_LORESERVE) | |
952 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; | |
953 | ||
3e932841 | 954 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
955 | amt = i_ehdrp->e_shnum; |
956 | amt *= sizeof (*x_shdrp); | |
268b6b39 | 957 | x_shdrp = bfd_alloc (abfd, amt); |
252b5132 | 958 | if (!x_shdrp) |
b34976b6 | 959 | return FALSE; |
252b5132 | 960 | |
5732c114 | 961 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
962 | { |
963 | #if DEBUG & 2 | |
5732c114 | 964 | elf_debug_section (count, *i_shdrp); |
252b5132 | 965 | #endif |
5732c114 | 966 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
b34976b6 | 967 | |
5732c114 AM |
968 | if (count == SHN_LORESERVE - 1) |
969 | i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
970 | } |
971 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 972 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 973 | return FALSE; |
252b5132 | 974 | |
3e932841 | 975 | /* need to dump the string table too... */ |
252b5132 | 976 | |
b34976b6 | 977 | return TRUE; |
252b5132 RH |
978 | } |
979 | ||
980 | long | |
268b6b39 | 981 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
982 | { |
983 | Elf_Internal_Shdr *hdr; | |
984 | Elf_Internal_Shdr *verhdr; | |
985 | unsigned long symcount; /* Number of external ELF symbols */ | |
986 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
987 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
988 | Elf_Internal_Sym *isym; |
989 | Elf_Internal_Sym *isymend; | |
990 | Elf_Internal_Sym *isymbuf = NULL; | |
991 | Elf_External_Versym *xver; | |
992 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 993 | const struct elf_backend_data *ebd; |
dc810e39 | 994 | bfd_size_type amt; |
252b5132 RH |
995 | |
996 | /* Read each raw ELF symbol, converting from external ELF form to | |
997 | internal ELF form, and then using the information to create a | |
998 | canonical bfd symbol table entry. | |
999 | ||
1000 | Note that we allocate the initial bfd canonical symbol buffer | |
1001 | based on a one-to-one mapping of the ELF symbols to canonical | |
1002 | symbols. We actually use all the ELF symbols, so there will be no | |
1003 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1004 | build the caller's pointer vector. */ |
252b5132 RH |
1005 | |
1006 | if (! dynamic) | |
1007 | { | |
1008 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1009 | verhdr = NULL; | |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1014 | if (elf_dynversym (abfd) == 0) | |
1015 | verhdr = NULL; | |
1016 | else | |
1017 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1018 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1019 | && elf_tdata (abfd)->verdef == NULL) | |
1020 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1021 | && elf_tdata (abfd)->verref == NULL)) | |
1022 | { | |
1023 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1024 | return -1; | |
1025 | } | |
1026 | } | |
1027 | ||
6cdc0ccc | 1028 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1029 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1030 | if (symcount == 0) |
1031 | sym = symbase = NULL; | |
1032 | else | |
1033 | { | |
6cdc0ccc AM |
1034 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1035 | NULL, NULL, NULL); | |
1036 | if (isymbuf == NULL) | |
1037 | return -1; | |
252b5132 | 1038 | |
dc810e39 AM |
1039 | amt = symcount; |
1040 | amt *= sizeof (elf_symbol_type); | |
268b6b39 | 1041 | symbase = bfd_zalloc (abfd, amt); |
252b5132 | 1042 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1043 | goto error_return; |
252b5132 RH |
1044 | |
1045 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1046 | if (verhdr != NULL |
1047 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1048 | { | |
1049 | (*_bfd_error_handler) | |
1050 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1051 | abfd->filename, | |
1052 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1053 | symcount); | |
1054 | ||
1055 | /* Slurp in the symbols without the version information, | |
1056 | since that is more helpful than just quitting. */ | |
1057 | verhdr = NULL; | |
1058 | } | |
1059 | ||
1060 | if (verhdr != NULL) | |
1061 | { | |
1062 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1063 | goto error_return; | |
1064 | ||
268b6b39 | 1065 | xverbuf = bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1066 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1067 | goto error_return; |
1068 | ||
268b6b39 | 1069 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1070 | goto error_return; |
1071 | } | |
1072 | ||
1073 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1074 | xver = xverbuf; |
1075 | if (xver != NULL) | |
1076 | ++xver; | |
1077 | isymend = isymbuf + symcount; | |
1078 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1079 | { |
6cdc0ccc | 1080 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1081 | sym->symbol.the_bfd = abfd; |
1082 | ||
1083 | sym->symbol.name = bfd_elf_string_from_elf_section (abfd, | |
1084 | hdr->sh_link, | |
6cdc0ccc | 1085 | isym->st_name); |
252b5132 | 1086 | |
6cdc0ccc | 1087 | sym->symbol.value = isym->st_value; |
252b5132 | 1088 | |
6cdc0ccc | 1089 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1090 | { |
1091 | sym->symbol.section = bfd_und_section_ptr; | |
1092 | } | |
6cdc0ccc AM |
1093 | else if (isym->st_shndx < SHN_LORESERVE |
1094 | || isym->st_shndx > SHN_HIRESERVE) | |
252b5132 | 1095 | { |
140f6c8e AM |
1096 | sym->symbol.section = bfd_section_from_elf_index (abfd, |
1097 | isym->st_shndx); | |
252b5132 RH |
1098 | if (sym->symbol.section == NULL) |
1099 | { | |
1100 | /* This symbol is in a section for which we did not | |
1101 | create a BFD section. Just use bfd_abs_section, | |
1102 | although it is wrong. FIXME. */ | |
1103 | sym->symbol.section = bfd_abs_section_ptr; | |
1104 | } | |
1105 | } | |
6cdc0ccc | 1106 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1107 | { |
1108 | sym->symbol.section = bfd_abs_section_ptr; | |
1109 | } | |
6cdc0ccc | 1110 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1111 | { |
1112 | sym->symbol.section = bfd_com_section_ptr; | |
1113 | /* Elf puts the alignment into the `value' field, and | |
1114 | the size into the `size' field. BFD wants to see the | |
1115 | size in the value field, and doesn't care (at the | |
1116 | moment) about the alignment. */ | |
6cdc0ccc | 1117 | sym->symbol.value = isym->st_size; |
252b5132 | 1118 | } |
252b5132 RH |
1119 | else |
1120 | sym->symbol.section = bfd_abs_section_ptr; | |
1121 | ||
1049f94e | 1122 | /* If this is a relocatable file, then the symbol value is |
252b5132 RH |
1123 | already section relative. */ |
1124 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1125 | sym->symbol.value -= sym->symbol.section->vma; | |
1126 | ||
6cdc0ccc | 1127 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1128 | { |
1129 | case STB_LOCAL: | |
1130 | sym->symbol.flags |= BSF_LOCAL; | |
1131 | break; | |
1132 | case STB_GLOBAL: | |
6cdc0ccc | 1133 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1134 | sym->symbol.flags |= BSF_GLOBAL; |
1135 | break; | |
1136 | case STB_WEAK: | |
1137 | sym->symbol.flags |= BSF_WEAK; | |
1138 | break; | |
1139 | } | |
1140 | ||
6cdc0ccc | 1141 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1142 | { |
1143 | case STT_SECTION: | |
1144 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1145 | break; | |
1146 | case STT_FILE: | |
1147 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1148 | break; | |
1149 | case STT_FUNC: | |
1150 | sym->symbol.flags |= BSF_FUNCTION; | |
1151 | break; | |
1152 | case STT_OBJECT: | |
1153 | sym->symbol.flags |= BSF_OBJECT; | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | if (dynamic) | |
1158 | sym->symbol.flags |= BSF_DYNAMIC; | |
1159 | ||
6cdc0ccc | 1160 | if (xver != NULL) |
252b5132 RH |
1161 | { |
1162 | Elf_Internal_Versym iversym; | |
1163 | ||
6cdc0ccc | 1164 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1165 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1166 | xver++; |
252b5132 RH |
1167 | } |
1168 | ||
1169 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1170 | if (ebd->elf_backend_symbol_processing) |
1171 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1172 | } |
1173 | } | |
1174 | ||
1175 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1176 | if (ebd->elf_backend_symbol_table_processing) |
1177 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1178 | |
1179 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1180 | ||
1181 | symcount = sym - symbase; | |
1182 | ||
1183 | /* Fill in the user's symbol pointer vector if needed. */ | |
1184 | if (symptrs) | |
1185 | { | |
1186 | long l = symcount; | |
1187 | ||
1188 | sym = symbase; | |
1189 | while (l-- > 0) | |
1190 | { | |
1191 | *symptrs++ = &sym->symbol; | |
1192 | sym++; | |
1193 | } | |
1194 | *symptrs = 0; /* Final null pointer */ | |
1195 | } | |
1196 | ||
6cdc0ccc AM |
1197 | if (xverbuf != NULL) |
1198 | free (xverbuf); | |
1199 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1200 | free (isymbuf); | |
252b5132 | 1201 | return symcount; |
9ad5cbcf | 1202 | |
252b5132 | 1203 | error_return: |
6cdc0ccc AM |
1204 | if (xverbuf != NULL) |
1205 | free (xverbuf); | |
1206 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1207 | free (isymbuf); | |
252b5132 RH |
1208 | return -1; |
1209 | } | |
1210 | ||
60bcf0fa | 1211 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1212 | them. */ |
252b5132 | 1213 | |
b34976b6 | 1214 | static bfd_boolean |
268b6b39 AM |
1215 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1216 | asection *asect, | |
1217 | Elf_Internal_Shdr *rel_hdr, | |
1218 | bfd_size_type reloc_count, | |
1219 | arelent *relents, | |
1220 | asymbol **symbols, | |
1221 | bfd_boolean dynamic) | |
252b5132 | 1222 | { |
9c5bfbb7 | 1223 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1224 | void *allocated = NULL; |
252b5132 | 1225 | bfd_byte *native_relocs; |
252b5132 RH |
1226 | arelent *relent; |
1227 | unsigned int i; | |
1228 | int entsize; | |
5ad8645c | 1229 | unsigned int symcount; |
252b5132 | 1230 | |
268b6b39 | 1231 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1232 | if (allocated == NULL) |
1233 | goto error_return; | |
1234 | ||
1235 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1236 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1237 | != rel_hdr->sh_size)) |
1238 | goto error_return; | |
1239 | ||
268b6b39 | 1240 | native_relocs = allocated; |
252b5132 | 1241 | |
252b5132 RH |
1242 | entsize = rel_hdr->sh_entsize; |
1243 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1244 | || entsize == sizeof (Elf_External_Rela)); | |
1245 | ||
5ad8645c AM |
1246 | if (dynamic) |
1247 | symcount = bfd_get_dynamic_symcount (abfd); | |
1248 | else | |
1249 | symcount = bfd_get_symcount (abfd); | |
1250 | ||
252b5132 RH |
1251 | for (i = 0, relent = relents; |
1252 | i < reloc_count; | |
1253 | i++, relent++, native_relocs += entsize) | |
1254 | { | |
1255 | Elf_Internal_Rela rela; | |
252b5132 RH |
1256 | |
1257 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1258 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1259 | else |
947216bf | 1260 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1261 | |
1262 | /* The address of an ELF reloc is section relative for an object | |
1263 | file, and absolute for an executable file or shared library. | |
1264 | The address of a normal BFD reloc is always section relative, | |
1265 | and the address of a dynamic reloc is absolute.. */ | |
1266 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1267 | relent->address = rela.r_offset; | |
1268 | else | |
1269 | relent->address = rela.r_offset - asect->vma; | |
1270 | ||
1271 | if (ELF_R_SYM (rela.r_info) == 0) | |
1272 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1273 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1274 | { |
1275 | (*_bfd_error_handler) | |
1276 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1277 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1278 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1279 | } | |
252b5132 RH |
1280 | else |
1281 | { | |
1282 | asymbol **ps, *s; | |
1283 | ||
1284 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; | |
1285 | s = *ps; | |
1286 | ||
1287 | /* Canonicalize ELF section symbols. FIXME: Why? */ | |
1288 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
1289 | relent->sym_ptr_ptr = ps; | |
1290 | else | |
1291 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
1292 | } | |
1293 | ||
1294 | relent->addend = rela.r_addend; | |
1295 | ||
90fff0d4 DJ |
1296 | if ((entsize == sizeof (Elf_External_Rela) |
1297 | && ebd->elf_info_to_howto != NULL) | |
1298 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1299 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1300 | else | |
947216bf | 1301 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1302 | } |
1303 | ||
252b5132 RH |
1304 | if (allocated != NULL) |
1305 | free (allocated); | |
1306 | ||
b34976b6 | 1307 | return TRUE; |
252b5132 RH |
1308 | |
1309 | error_return: | |
1310 | if (allocated != NULL) | |
1311 | free (allocated); | |
b34976b6 | 1312 | return FALSE; |
252b5132 RH |
1313 | } |
1314 | ||
42fdc509 MM |
1315 | /* Read in and swap the external relocs. */ |
1316 | ||
b34976b6 | 1317 | bfd_boolean |
268b6b39 AM |
1318 | elf_slurp_reloc_table (bfd *abfd, |
1319 | asection *asect, | |
1320 | asymbol **symbols, | |
1321 | bfd_boolean dynamic) | |
42fdc509 MM |
1322 | { |
1323 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1324 | Elf_Internal_Shdr *rel_hdr; | |
1325 | Elf_Internal_Shdr *rel_hdr2; | |
1326 | bfd_size_type reloc_count; | |
1327 | bfd_size_type reloc_count2; | |
1328 | arelent *relents; | |
dc810e39 | 1329 | bfd_size_type amt; |
42fdc509 MM |
1330 | |
1331 | if (asect->relocation != NULL) | |
b34976b6 | 1332 | return TRUE; |
42fdc509 MM |
1333 | |
1334 | if (! dynamic) | |
1335 | { | |
1336 | if ((asect->flags & SEC_RELOC) == 0 | |
1337 | || asect->reloc_count == 0) | |
b34976b6 | 1338 | return TRUE; |
42fdc509 MM |
1339 | |
1340 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1341 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1342 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1343 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1344 | |
1345 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1346 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1347 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1348 | ||
1349 | } | |
1350 | else | |
1351 | { | |
57e21bef MM |
1352 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1353 | case because relocations against this section may use the | |
1354 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1355 | in elf.c does not update the RELOC_COUNT. */ | |
42fdc509 | 1356 | if (asect->_raw_size == 0) |
b34976b6 | 1357 | return TRUE; |
42fdc509 MM |
1358 | |
1359 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1360 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1361 | rel_hdr2 = NULL; |
57e21bef | 1362 | reloc_count2 = 0; |
42fdc509 MM |
1363 | } |
1364 | ||
dc810e39 | 1365 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
268b6b39 | 1366 | relents = bfd_alloc (abfd, amt); |
42fdc509 | 1367 | if (relents == NULL) |
b34976b6 | 1368 | return FALSE; |
42fdc509 MM |
1369 | |
1370 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1371 | rel_hdr, reloc_count, | |
1372 | relents, | |
1373 | symbols, dynamic)) | |
b34976b6 | 1374 | return FALSE; |
60bcf0fa NC |
1375 | |
1376 | if (rel_hdr2 | |
42fdc509 MM |
1377 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1378 | rel_hdr2, reloc_count2, | |
1379 | relents + reloc_count, | |
1380 | symbols, dynamic)) | |
b34976b6 | 1381 | return FALSE; |
42fdc509 | 1382 | |
42fdc509 | 1383 | asect->relocation = relents; |
b34976b6 | 1384 | return TRUE; |
42fdc509 MM |
1385 | } |
1386 | ||
252b5132 RH |
1387 | #ifdef DEBUG |
1388 | static void | |
268b6b39 | 1389 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1390 | { |
1391 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1392 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1393 | (long) hdr); | |
1394 | fprintf (stderr, | |
1395 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1396 | (long) hdr->sh_name, | |
1397 | (long) hdr->sh_type, | |
1398 | (long) hdr->sh_flags); | |
1399 | fprintf (stderr, | |
1400 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1401 | (long) hdr->sh_addr, | |
1402 | (long) hdr->sh_offset, | |
1403 | (long) hdr->sh_size); | |
1404 | fprintf (stderr, | |
1405 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1406 | (long) hdr->sh_link, | |
1407 | (long) hdr->sh_info, | |
1408 | (long) hdr->sh_addralign); | |
1409 | fprintf (stderr, "sh_entsize = %ld\n", | |
1410 | (long) hdr->sh_entsize); | |
1411 | fflush (stderr); | |
1412 | } | |
1413 | ||
1414 | static void | |
268b6b39 | 1415 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1416 | { |
1417 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1418 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1419 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1420 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1421 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1422 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1423 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1424 | } | |
1425 | ||
1426 | static char * | |
268b6b39 | 1427 | elf_symbol_flags (flagword flags) |
252b5132 RH |
1428 | { |
1429 | static char buffer[1024]; | |
1430 | ||
1431 | buffer[0] = '\0'; | |
1432 | if (flags & BSF_LOCAL) | |
1433 | strcat (buffer, " local"); | |
1434 | ||
1435 | if (flags & BSF_GLOBAL) | |
1436 | strcat (buffer, " global"); | |
1437 | ||
1438 | if (flags & BSF_DEBUGGING) | |
1439 | strcat (buffer, " debug"); | |
1440 | ||
1441 | if (flags & BSF_FUNCTION) | |
1442 | strcat (buffer, " function"); | |
1443 | ||
1444 | if (flags & BSF_KEEP) | |
1445 | strcat (buffer, " keep"); | |
1446 | ||
1447 | if (flags & BSF_KEEP_G) | |
1448 | strcat (buffer, " keep_g"); | |
1449 | ||
1450 | if (flags & BSF_WEAK) | |
1451 | strcat (buffer, " weak"); | |
1452 | ||
1453 | if (flags & BSF_SECTION_SYM) | |
1454 | strcat (buffer, " section-sym"); | |
1455 | ||
1456 | if (flags & BSF_OLD_COMMON) | |
1457 | strcat (buffer, " old-common"); | |
1458 | ||
1459 | if (flags & BSF_NOT_AT_END) | |
1460 | strcat (buffer, " not-at-end"); | |
1461 | ||
1462 | if (flags & BSF_CONSTRUCTOR) | |
1463 | strcat (buffer, " constructor"); | |
1464 | ||
1465 | if (flags & BSF_WARNING) | |
1466 | strcat (buffer, " warning"); | |
1467 | ||
1468 | if (flags & BSF_INDIRECT) | |
1469 | strcat (buffer, " indirect"); | |
1470 | ||
1471 | if (flags & BSF_FILE) | |
1472 | strcat (buffer, " file"); | |
1473 | ||
1474 | if (flags & DYNAMIC) | |
1475 | strcat (buffer, " dynamic"); | |
1476 | ||
1477 | if (flags & ~(BSF_LOCAL | |
1478 | | BSF_GLOBAL | |
1479 | | BSF_DEBUGGING | |
1480 | | BSF_FUNCTION | |
1481 | | BSF_KEEP | |
1482 | | BSF_KEEP_G | |
1483 | | BSF_WEAK | |
1484 | | BSF_SECTION_SYM | |
1485 | | BSF_OLD_COMMON | |
1486 | | BSF_NOT_AT_END | |
1487 | | BSF_CONSTRUCTOR | |
1488 | | BSF_WARNING | |
1489 | | BSF_INDIRECT | |
1490 | | BSF_FILE | |
1491 | | BSF_DYNAMIC)) | |
1492 | strcat (buffer, " unknown-bits"); | |
1493 | ||
1494 | return buffer; | |
1495 | } | |
1496 | #endif | |
1497 | \f | |
8d6337fe RM |
1498 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1499 | reconstruct an ELF file by reading the segments out of remote memory | |
1500 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1501 | points to. If not null, *LOADBASEP is filled in with the difference | |
1502 | between the VMAs from which the segments were read, and the VMAs the | |
1503 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1504 | ||
1505 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1506 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1507 | should return zero on success or an `errno' code on failure. TEMPL must | |
1508 | be a BFD for a target with the word size and byte order found in the | |
1509 | remote memory. */ | |
1510 | ||
1511 | bfd * | |
268b6b39 AM |
1512 | NAME(_bfd_elf,bfd_from_remote_memory) |
1513 | (bfd *templ, | |
1514 | bfd_vma ehdr_vma, | |
1515 | bfd_vma *loadbasep, | |
1516 | int (*target_read_memory) (bfd_vma, char *, int)) | |
8d6337fe RM |
1517 | { |
1518 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1519 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1520 | Elf_External_Phdr *x_phdrs; | |
1521 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1522 | bfd *nbfd; | |
1523 | struct bfd_in_memory *bim; | |
1524 | int contents_size; | |
1525 | char *contents; | |
1526 | int err; | |
1527 | unsigned int i; | |
1528 | bfd_vma loadbase; | |
1529 | ||
1530 | /* Read in the ELF header in external format. */ | |
1531 | err = target_read_memory (ehdr_vma, (char *) &x_ehdr, sizeof x_ehdr); | |
1532 | if (err) | |
1533 | { | |
1534 | bfd_set_error (bfd_error_system_call); | |
1535 | errno = err; | |
1536 | return NULL; | |
1537 | } | |
1538 | ||
1539 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1540 | make use of. The magic number must match, the address size ('class') | |
1541 | and byte-swapping must match our XVEC entry. */ | |
1542 | ||
1543 | if (! elf_file_p (&x_ehdr) | |
1544 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1545 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1546 | { | |
1547 | bfd_set_error (bfd_error_wrong_format); | |
1548 | return NULL; | |
1549 | } | |
1550 | ||
1551 | /* Check that file's byte order matches xvec's */ | |
1552 | switch (x_ehdr.e_ident[EI_DATA]) | |
1553 | { | |
1554 | case ELFDATA2MSB: /* Big-endian */ | |
1555 | if (! bfd_header_big_endian (templ)) | |
1556 | { | |
1557 | bfd_set_error (bfd_error_wrong_format); | |
1558 | return NULL; | |
1559 | } | |
1560 | break; | |
1561 | case ELFDATA2LSB: /* Little-endian */ | |
1562 | if (! bfd_header_little_endian (templ)) | |
1563 | { | |
1564 | bfd_set_error (bfd_error_wrong_format); | |
1565 | return NULL; | |
1566 | } | |
1567 | break; | |
1568 | case ELFDATANONE: /* No data encoding specified */ | |
1569 | default: /* Unknown data encoding specified */ | |
1570 | bfd_set_error (bfd_error_wrong_format); | |
1571 | return NULL; | |
1572 | } | |
1573 | ||
1574 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1575 | ||
1576 | /* The file header tells where to find the program headers. | |
1577 | These are what we use to actually choose what to read. */ | |
1578 | ||
1579 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1580 | { | |
1581 | bfd_set_error (bfd_error_wrong_format); | |
1582 | return NULL; | |
1583 | } | |
1584 | ||
268b6b39 | 1585 | x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); |
8d6337fe RM |
1586 | if (x_phdrs == NULL) |
1587 | { | |
1588 | bfd_set_error (bfd_error_no_memory); | |
1589 | return NULL; | |
1590 | } | |
1591 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (char *) x_phdrs, | |
1592 | i_ehdr.e_phnum * sizeof x_phdrs[0]); | |
1593 | if (err) | |
1594 | { | |
1595 | free (x_phdrs); | |
1596 | bfd_set_error (bfd_error_system_call); | |
1597 | errno = err; | |
1598 | return NULL; | |
1599 | } | |
1600 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1601 | ||
1602 | contents_size = 0; | |
1603 | last_phdr = NULL; | |
1604 | loadbase = ehdr_vma; | |
1605 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1606 | { | |
1607 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
1608 | if (i_phdrs[i].p_type == PT_LOAD) | |
1609 | { | |
1610 | bfd_vma segment_end; | |
1611 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1612 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1613 | if (segment_end > (bfd_vma) contents_size) | |
1614 | contents_size = segment_end; | |
1615 | ||
1616 | if ((i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1617 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1618 | ||
1619 | last_phdr = &i_phdrs[i]; | |
1620 | } | |
1621 | } | |
1622 | if (last_phdr == NULL) | |
1623 | { | |
1624 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1625 | free (x_phdrs); | |
1626 | bfd_set_error (bfd_error_wrong_format); | |
1627 | return NULL; | |
1628 | } | |
1629 | ||
1630 | /* Trim the last segment so we don't bother with zeros in the last page | |
1631 | that are off the end of the file. However, if the extra bit in that | |
1632 | page includes the section headers, keep them. */ | |
1633 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1634 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1635 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1636 | { | |
1637 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1638 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1639 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1640 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1641 | } | |
1642 | else | |
1643 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1644 | ||
1645 | /* Now we know the size of the whole image we want read in. */ | |
268b6b39 | 1646 | contents = bfd_zmalloc (contents_size); |
8d6337fe RM |
1647 | if (contents == NULL) |
1648 | { | |
1649 | free (x_phdrs); | |
1650 | bfd_set_error (bfd_error_no_memory); | |
1651 | return NULL; | |
1652 | } | |
1653 | ||
1654 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1655 | if (i_phdrs[i].p_type == PT_LOAD) | |
1656 | { | |
1657 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1658 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1659 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1660 | if (end > (bfd_vma) contents_size) | |
1661 | end = contents_size; | |
1662 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1663 | & -i_phdrs[i].p_align, | |
1664 | contents + start, end - start); | |
1665 | if (err) | |
1666 | { | |
1667 | free (x_phdrs); | |
1668 | free (contents); | |
1669 | bfd_set_error (bfd_error_system_call); | |
1670 | errno = err; | |
1671 | return NULL; | |
1672 | } | |
1673 | } | |
1674 | free (x_phdrs); | |
1675 | ||
1676 | /* If the segments visible in memory didn't include the section headers, | |
1677 | then clear them from the file header. */ | |
1678 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1679 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1680 | { | |
1681 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1682 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1683 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1684 | } | |
1685 | ||
1686 | /* This will normally have been in the first PT_LOAD segment. But it | |
1687 | conceivably could be missing, and we might have just changed it. */ | |
1688 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1689 | ||
1690 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
268b6b39 | 1691 | bim = bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1692 | if (bim == NULL) |
1693 | { | |
1694 | free (contents); | |
1695 | bfd_set_error (bfd_error_no_memory); | |
1696 | return NULL; | |
1697 | } | |
1698 | nbfd = _bfd_new_bfd (); | |
1699 | if (nbfd == NULL) | |
1700 | { | |
1701 | free (bim); | |
1702 | free (contents); | |
1703 | bfd_set_error (bfd_error_no_memory); | |
1704 | return NULL; | |
1705 | } | |
1706 | nbfd->filename = "<in-memory>"; | |
1707 | nbfd->xvec = templ->xvec; | |
1708 | bim->size = contents_size; | |
1709 | bim->buffer = contents; | |
268b6b39 | 1710 | nbfd->iostream = bim; |
8d6337fe RM |
1711 | nbfd->flags = BFD_IN_MEMORY; |
1712 | nbfd->direction = read_direction; | |
1713 | nbfd->mtime = time (NULL); | |
1714 | nbfd->mtime_set = TRUE; | |
1715 | ||
1716 | if (loadbasep) | |
1717 | *loadbasep = loadbase; | |
1718 | return nbfd; | |
1719 | } | |
1720 | \f | |
252b5132 | 1721 | #include "elfcore.h" |
252b5132 RH |
1722 | \f |
1723 | /* Size-dependent data and functions. */ | |
1724 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1725 | sizeof (Elf_External_Ehdr), | |
1726 | sizeof (Elf_External_Phdr), | |
1727 | sizeof (Elf_External_Shdr), | |
1728 | sizeof (Elf_External_Rel), | |
1729 | sizeof (Elf_External_Rela), | |
1730 | sizeof (Elf_External_Sym), | |
1731 | sizeof (Elf_External_Dyn), | |
1732 | sizeof (Elf_External_Note), | |
70bcb145 | 1733 | 4, |
c7ac6ff8 | 1734 | 1, |
45d6a902 | 1735 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1736 | ELFCLASS, EV_CURRENT, |
1737 | elf_write_out_phdrs, | |
1738 | elf_write_shdrs_and_ehdr, | |
b9f66672 | 1739 | elf_write_relocs, |
73ff0d56 | 1740 | elf_swap_symbol_in, |
252b5132 RH |
1741 | elf_swap_symbol_out, |
1742 | elf_slurp_reloc_table, | |
1743 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1744 | elf_swap_dyn_in, |
1745 | elf_swap_dyn_out, | |
947216bf AM |
1746 | elf_swap_reloc_in, |
1747 | elf_swap_reloc_out, | |
1748 | elf_swap_reloca_in, | |
1749 | elf_swap_reloca_out | |
252b5132 | 1750 | }; |