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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) | |
105 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
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) | |
118 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) | |
119 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) | |
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) | |
73d074b4 DJ |
124 | #define elf_bfd_discard_info NAME(bfd_elf,discard_info) |
125 | #define elf_reloc_symbol_deleted_p NAME(_bfd_elf,reloc_symbol_deleted_p) | |
252b5132 RH |
126 | #define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
127 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) | |
252b5132 RH |
128 | #define elf_gc_sections NAME(_bfd_elf,gc_sections) |
129 | #define elf_gc_common_finalize_got_offsets \ | |
130 | NAME(_bfd_elf,gc_common_finalize_got_offsets) | |
131 | #define elf_gc_common_final_link NAME(_bfd_elf,gc_common_final_link) | |
132 | #define elf_gc_record_vtinherit NAME(_bfd_elf,gc_record_vtinherit) | |
133 | #define elf_gc_record_vtentry NAME(_bfd_elf,gc_record_vtentry) | |
30b30c21 RH |
134 | #define elf_link_record_local_dynamic_symbol \ |
135 | NAME(_bfd_elf,link_record_local_dynamic_symbol) | |
252b5132 RH |
136 | |
137 | #if ARCH_SIZE == 64 | |
138 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
139 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
140 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) | |
141 | #define ELFCLASS ELFCLASS64 | |
142 | #define FILE_ALIGN 8 | |
143 | #define LOG_FILE_ALIGN 3 | |
144 | #endif | |
145 | #if ARCH_SIZE == 32 | |
146 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
147 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
148 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) | |
149 | #define ELFCLASS ELFCLASS32 | |
150 | #define FILE_ALIGN 4 | |
151 | #define LOG_FILE_ALIGN 2 | |
152 | #endif | |
153 | ||
252b5132 RH |
154 | #define elf_stringtab_init _bfd_elf_stringtab_init |
155 | ||
156 | #define section_from_elf_index bfd_section_from_elf_index | |
157 | ||
252b5132 | 158 | #ifdef DEBUG |
268b6b39 AM |
159 | static void elf_debug_section (int, Elf_Internal_Shdr *); |
160 | static void elf_debug_file (Elf_Internal_Ehdr *); | |
161 | static char *elf_symbol_flags (flagword); | |
252b5132 RH |
162 | #endif |
163 | \f | |
164 | /* Structure swapping routines */ | |
165 | ||
166 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions | |
167 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
168 | #if ARCH_SIZE == 64 | |
dc810e39 AM |
169 | #define H_PUT_WORD H_PUT_64 |
170 | #define H_PUT_SIGNED_WORD H_PUT_S64 | |
171 | #define H_GET_WORD H_GET_64 | |
172 | #define H_GET_SIGNED_WORD H_GET_S64 | |
252b5132 RH |
173 | #endif |
174 | #if ARCH_SIZE == 32 | |
dc810e39 AM |
175 | #define H_PUT_WORD H_PUT_32 |
176 | #define H_PUT_SIGNED_WORD H_PUT_S32 | |
177 | #define H_GET_WORD H_GET_32 | |
178 | #define H_GET_SIGNED_WORD H_GET_S32 | |
252b5132 RH |
179 | #endif |
180 | ||
181 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
3e932841 | 182 | format. */ |
252b5132 RH |
183 | |
184 | void | |
268b6b39 AM |
185 | elf_swap_symbol_in (bfd *abfd, |
186 | const void *psrc, | |
187 | const void *pshn, | |
188 | Elf_Internal_Sym *dst) | |
252b5132 | 189 | { |
268b6b39 AM |
190 | const Elf_External_Sym *src = psrc; |
191 | const Elf_External_Sym_Shndx *shndx = pshn; | |
86dc0f79 RH |
192 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
193 | ||
dc810e39 | 194 | dst->st_name = H_GET_32 (abfd, src->st_name); |
86dc0f79 | 195 | if (signed_vma) |
dc810e39 | 196 | dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value); |
86dc0f79 | 197 | else |
dc810e39 AM |
198 | dst->st_value = H_GET_WORD (abfd, src->st_value); |
199 | dst->st_size = H_GET_WORD (abfd, src->st_size); | |
200 | dst->st_info = H_GET_8 (abfd, src->st_info); | |
201 | dst->st_other = H_GET_8 (abfd, src->st_other); | |
202 | dst->st_shndx = H_GET_16 (abfd, src->st_shndx); | |
9ad5cbcf AM |
203 | if (dst->st_shndx == SHN_XINDEX) |
204 | { | |
205 | if (shndx == NULL) | |
206 | abort (); | |
207 | dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx); | |
208 | } | |
252b5132 RH |
209 | } |
210 | ||
211 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
3e932841 | 212 | format. */ |
252b5132 RH |
213 | |
214 | void | |
268b6b39 AM |
215 | elf_swap_symbol_out (bfd *abfd, |
216 | const Elf_Internal_Sym *src, | |
217 | void *cdst, | |
218 | void *shndx) | |
252b5132 | 219 | { |
9ad5cbcf | 220 | unsigned int tmp; |
268b6b39 | 221 | Elf_External_Sym *dst = cdst; |
dc810e39 AM |
222 | H_PUT_32 (abfd, src->st_name, dst->st_name); |
223 | H_PUT_WORD (abfd, src->st_value, dst->st_value); | |
224 | H_PUT_WORD (abfd, src->st_size, dst->st_size); | |
225 | H_PUT_8 (abfd, src->st_info, dst->st_info); | |
226 | H_PUT_8 (abfd, src->st_other, dst->st_other); | |
9ad5cbcf AM |
227 | tmp = src->st_shndx; |
228 | if (tmp > SHN_HIRESERVE) | |
229 | { | |
230 | if (shndx == NULL) | |
231 | abort (); | |
232 | H_PUT_32 (abfd, tmp, shndx); | |
233 | tmp = SHN_XINDEX; | |
234 | } | |
235 | H_PUT_16 (abfd, tmp, dst->st_shndx); | |
252b5132 RH |
236 | } |
237 | ||
252b5132 | 238 | /* Translate an ELF file header in external format into an ELF file header in |
3e932841 | 239 | internal format. */ |
252b5132 RH |
240 | |
241 | static void | |
268b6b39 AM |
242 | elf_swap_ehdr_in (bfd *abfd, |
243 | const Elf_External_Ehdr *src, | |
244 | Elf_Internal_Ehdr *dst) | |
252b5132 | 245 | { |
448cafa4 | 246 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 247 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
dc810e39 AM |
248 | dst->e_type = H_GET_16 (abfd, src->e_type); |
249 | dst->e_machine = H_GET_16 (abfd, src->e_machine); | |
250 | dst->e_version = H_GET_32 (abfd, src->e_version); | |
448cafa4 | 251 | if (signed_vma) |
dc810e39 | 252 | dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry); |
448cafa4 | 253 | else |
dc810e39 AM |
254 | dst->e_entry = H_GET_WORD (abfd, src->e_entry); |
255 | dst->e_phoff = H_GET_WORD (abfd, src->e_phoff); | |
256 | dst->e_shoff = H_GET_WORD (abfd, src->e_shoff); | |
257 | dst->e_flags = H_GET_32 (abfd, src->e_flags); | |
258 | dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize); | |
259 | dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize); | |
260 | dst->e_phnum = H_GET_16 (abfd, src->e_phnum); | |
261 | dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize); | |
262 | dst->e_shnum = H_GET_16 (abfd, src->e_shnum); | |
263 | dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx); | |
252b5132 RH |
264 | } |
265 | ||
266 | /* Translate an ELF file header in internal format into an ELF file header in | |
3e932841 | 267 | external format. */ |
252b5132 RH |
268 | |
269 | static void | |
268b6b39 AM |
270 | elf_swap_ehdr_out (bfd *abfd, |
271 | const Elf_Internal_Ehdr *src, | |
272 | Elf_External_Ehdr *dst) | |
252b5132 | 273 | { |
5732c114 | 274 | unsigned int tmp; |
448cafa4 | 275 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
252b5132 | 276 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
3e932841 | 277 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
278 | H_PUT_16 (abfd, src->e_type, dst->e_type); |
279 | H_PUT_16 (abfd, src->e_machine, dst->e_machine); | |
280 | H_PUT_32 (abfd, src->e_version, dst->e_version); | |
448cafa4 | 281 | if (signed_vma) |
dc810e39 | 282 | H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry); |
448cafa4 | 283 | else |
dc810e39 AM |
284 | H_PUT_WORD (abfd, src->e_entry, dst->e_entry); |
285 | H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff); | |
286 | H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff); | |
287 | H_PUT_32 (abfd, src->e_flags, dst->e_flags); | |
288 | H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
289 | H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
290 | H_PUT_16 (abfd, src->e_phnum, dst->e_phnum); | |
291 | H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
5732c114 AM |
292 | tmp = src->e_shnum; |
293 | if (tmp >= SHN_LORESERVE) | |
294 | tmp = SHN_UNDEF; | |
295 | H_PUT_16 (abfd, tmp, dst->e_shnum); | |
296 | tmp = src->e_shstrndx; | |
297 | if (tmp >= SHN_LORESERVE) | |
298 | tmp = SHN_XINDEX; | |
299 | H_PUT_16 (abfd, tmp, dst->e_shstrndx); | |
252b5132 RH |
300 | } |
301 | ||
252b5132 | 302 | /* Translate an ELF section header table entry in external format into an |
3e932841 | 303 | ELF section header table entry in internal format. */ |
252b5132 RH |
304 | |
305 | static void | |
268b6b39 AM |
306 | elf_swap_shdr_in (bfd *abfd, |
307 | const Elf_External_Shdr *src, | |
308 | Elf_Internal_Shdr *dst) | |
252b5132 | 309 | { |
86dc0f79 RH |
310 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
311 | ||
dc810e39 AM |
312 | dst->sh_name = H_GET_32 (abfd, src->sh_name); |
313 | dst->sh_type = H_GET_32 (abfd, src->sh_type); | |
314 | dst->sh_flags = H_GET_WORD (abfd, src->sh_flags); | |
86dc0f79 | 315 | if (signed_vma) |
dc810e39 | 316 | dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr); |
86dc0f79 | 317 | else |
dc810e39 AM |
318 | dst->sh_addr = H_GET_WORD (abfd, src->sh_addr); |
319 | dst->sh_offset = H_GET_WORD (abfd, src->sh_offset); | |
320 | dst->sh_size = H_GET_WORD (abfd, src->sh_size); | |
321 | dst->sh_link = H_GET_32 (abfd, src->sh_link); | |
322 | dst->sh_info = H_GET_32 (abfd, src->sh_info); | |
323 | dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign); | |
324 | dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); | |
252b5132 RH |
325 | dst->bfd_section = NULL; |
326 | dst->contents = NULL; | |
327 | } | |
328 | ||
329 | /* Translate an ELF section header table entry in internal format into an | |
3e932841 | 330 | ELF section header table entry in external format. */ |
252b5132 RH |
331 | |
332 | static void | |
268b6b39 AM |
333 | elf_swap_shdr_out (bfd *abfd, |
334 | const Elf_Internal_Shdr *src, | |
335 | Elf_External_Shdr *dst) | |
252b5132 | 336 | { |
3e932841 | 337 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
338 | H_PUT_32 (abfd, src->sh_name, dst->sh_name); |
339 | H_PUT_32 (abfd, src->sh_type, dst->sh_type); | |
340 | H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags); | |
341 | H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr); | |
342 | H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset); | |
343 | H_PUT_WORD (abfd, src->sh_size, dst->sh_size); | |
344 | H_PUT_32 (abfd, src->sh_link, dst->sh_link); | |
345 | H_PUT_32 (abfd, src->sh_info, dst->sh_info); | |
346 | H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign); | |
347 | H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize); | |
252b5132 RH |
348 | } |
349 | ||
252b5132 | 350 | /* Translate an ELF program header table entry in external format into an |
3e932841 | 351 | ELF program header table entry in internal format. */ |
252b5132 RH |
352 | |
353 | void | |
268b6b39 AM |
354 | elf_swap_phdr_in (bfd *abfd, |
355 | const Elf_External_Phdr *src, | |
356 | Elf_Internal_Phdr *dst) | |
252b5132 | 357 | { |
86dc0f79 RH |
358 | int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; |
359 | ||
dc810e39 AM |
360 | dst->p_type = H_GET_32 (abfd, src->p_type); |
361 | dst->p_flags = H_GET_32 (abfd, src->p_flags); | |
362 | dst->p_offset = H_GET_WORD (abfd, src->p_offset); | |
86dc0f79 RH |
363 | if (signed_vma) |
364 | { | |
dc810e39 AM |
365 | dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr); |
366 | dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr); | |
86dc0f79 RH |
367 | } |
368 | else | |
369 | { | |
dc810e39 AM |
370 | dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr); |
371 | dst->p_paddr = H_GET_WORD (abfd, src->p_paddr); | |
86dc0f79 | 372 | } |
dc810e39 AM |
373 | dst->p_filesz = H_GET_WORD (abfd, src->p_filesz); |
374 | dst->p_memsz = H_GET_WORD (abfd, src->p_memsz); | |
375 | dst->p_align = H_GET_WORD (abfd, src->p_align); | |
252b5132 RH |
376 | } |
377 | ||
378 | void | |
268b6b39 AM |
379 | elf_swap_phdr_out (bfd *abfd, |
380 | const Elf_Internal_Phdr *src, | |
381 | Elf_External_Phdr *dst) | |
252b5132 | 382 | { |
3e932841 | 383 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
dc810e39 AM |
384 | H_PUT_32 (abfd, src->p_type, dst->p_type); |
385 | H_PUT_WORD (abfd, src->p_offset, dst->p_offset); | |
386 | H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr); | |
387 | H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr); | |
388 | H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz); | |
389 | H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz); | |
390 | H_PUT_32 (abfd, src->p_flags, dst->p_flags); | |
391 | H_PUT_WORD (abfd, src->p_align, dst->p_align); | |
252b5132 RH |
392 | } |
393 | ||
3e932841 | 394 | /* Translate an ELF reloc from external format to internal format. */ |
947216bf | 395 | void |
268b6b39 AM |
396 | elf_swap_reloc_in (bfd *abfd, |
397 | const bfd_byte *s, | |
398 | Elf_Internal_Rela *dst) | |
252b5132 | 399 | { |
947216bf | 400 | const Elf_External_Rel *src = (const Elf_External_Rel *) s; |
dc810e39 AM |
401 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
402 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
947216bf | 403 | dst->r_addend = 0; |
252b5132 RH |
404 | } |
405 | ||
947216bf | 406 | void |
268b6b39 AM |
407 | elf_swap_reloca_in (bfd *abfd, |
408 | const bfd_byte *s, | |
409 | Elf_Internal_Rela *dst) | |
252b5132 | 410 | { |
947216bf | 411 | const Elf_External_Rela *src = (const Elf_External_Rela *) s; |
dc810e39 AM |
412 | dst->r_offset = H_GET_WORD (abfd, src->r_offset); |
413 | dst->r_info = H_GET_WORD (abfd, src->r_info); | |
414 | dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend); | |
252b5132 RH |
415 | } |
416 | ||
3e932841 | 417 | /* Translate an ELF reloc from internal format to external format. */ |
947216bf | 418 | void |
268b6b39 AM |
419 | elf_swap_reloc_out (bfd *abfd, |
420 | const Elf_Internal_Rela *src, | |
421 | bfd_byte *d) | |
252b5132 | 422 | { |
947216bf | 423 | Elf_External_Rel *dst = (Elf_External_Rel *) d; |
dc810e39 AM |
424 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
425 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
252b5132 RH |
426 | } |
427 | ||
947216bf | 428 | void |
268b6b39 AM |
429 | elf_swap_reloca_out (bfd *abfd, |
430 | const Elf_Internal_Rela *src, | |
431 | bfd_byte *d) | |
252b5132 | 432 | { |
947216bf | 433 | Elf_External_Rela *dst = (Elf_External_Rela *) d; |
dc810e39 AM |
434 | H_PUT_WORD (abfd, src->r_offset, dst->r_offset); |
435 | H_PUT_WORD (abfd, src->r_info, dst->r_info); | |
436 | H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend); | |
252b5132 RH |
437 | } |
438 | ||
268b6b39 AM |
439 | void |
440 | elf_swap_dyn_in (bfd *abfd, | |
441 | const void *p, | |
442 | Elf_Internal_Dyn *dst) | |
252b5132 | 443 | { |
268b6b39 | 444 | const Elf_External_Dyn *src = p; |
252b5132 | 445 | |
dc810e39 AM |
446 | dst->d_tag = H_GET_WORD (abfd, src->d_tag); |
447 | dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val); | |
252b5132 RH |
448 | } |
449 | ||
268b6b39 AM |
450 | void |
451 | elf_swap_dyn_out (bfd *abfd, | |
452 | const Elf_Internal_Dyn *src, | |
453 | void *p) | |
252b5132 | 454 | { |
268b6b39 | 455 | Elf_External_Dyn *dst = p; |
c7ac6ff8 | 456 | |
dc810e39 AM |
457 | H_PUT_WORD (abfd, src->d_tag, dst->d_tag); |
458 | H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val); | |
252b5132 RH |
459 | } |
460 | \f | |
461 | /* ELF .o/exec file reading */ | |
462 | ||
252b5132 RH |
463 | /* Begin processing a given object. |
464 | ||
465 | First we validate the file by reading in the ELF header and checking | |
466 | the magic number. */ | |
467 | ||
268b6b39 AM |
468 | static inline bfd_boolean |
469 | elf_file_p (Elf_External_Ehdr *x_ehdrp) | |
252b5132 RH |
470 | { |
471 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) | |
472 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
473 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
474 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
475 | } | |
476 | ||
477 | /* Check to see if the file associated with ABFD matches the target vector | |
478 | that ABFD points to. | |
479 | ||
480 | Note that we may be called several times with the same ABFD, but different | |
481 | target vectors, most of which will not match. We have to avoid leaving | |
482 | any side effects in ABFD, or any data it points to (like tdata), if the | |
483 | file does not match the target vector. */ | |
484 | ||
485 | const bfd_target * | |
268b6b39 | 486 | elf_object_p (bfd *abfd) |
252b5132 RH |
487 | { |
488 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
489 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
490 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
5732c114 | 491 | Elf_Internal_Shdr i_shdr; |
ed591155 | 492 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
252b5132 RH |
493 | unsigned int shindex; |
494 | char *shstrtab; /* Internal copy of section header stringtab */ | |
9c5bfbb7 | 495 | const struct elf_backend_data *ebd; |
ed591155 | 496 | struct bfd_preserve preserve; |
252b5132 | 497 | asection *s; |
dc810e39 | 498 | bfd_size_type amt; |
252b5132 | 499 | |
e84d6fca | 500 | preserve.marker = NULL; |
a17cc40f | 501 | |
252b5132 RH |
502 | /* Read in the ELF header in external format. */ |
503 | ||
268b6b39 | 504 | if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr)) |
252b5132 RH |
505 | { |
506 | if (bfd_get_error () != bfd_error_system_call) | |
507 | goto got_wrong_format_error; | |
508 | else | |
509 | goto got_no_match; | |
510 | } | |
511 | ||
512 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
513 | make use of. The magic number must match, the address size ('class') | |
514 | and byte-swapping must match our XVEC entry, and it must have a | |
515 | section header table (FIXME: See comments re sections at top of this | |
3e932841 | 516 | file). */ |
252b5132 | 517 | |
82e51918 AM |
518 | if (! elf_file_p (&x_ehdr) |
519 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
520 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
252b5132 RH |
521 | goto got_wrong_format_error; |
522 | ||
523 | /* Check that file's byte order matches xvec's */ | |
524 | switch (x_ehdr.e_ident[EI_DATA]) | |
525 | { | |
526 | case ELFDATA2MSB: /* Big-endian */ | |
527 | if (! bfd_header_big_endian (abfd)) | |
528 | goto got_wrong_format_error; | |
529 | break; | |
530 | case ELFDATA2LSB: /* Little-endian */ | |
531 | if (! bfd_header_little_endian (abfd)) | |
532 | goto got_wrong_format_error; | |
533 | break; | |
534 | case ELFDATANONE: /* No data encoding specified */ | |
535 | default: /* Unknown data encoding specified */ | |
536 | goto got_wrong_format_error; | |
537 | } | |
538 | ||
0c83546a AM |
539 | if (!bfd_preserve_save (abfd, &preserve)) |
540 | goto got_no_match; | |
541 | ||
252b5132 RH |
542 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
543 | the tdata pointer in the bfd. */ | |
544 | ||
0c83546a | 545 | if (! (*abfd->xvec->_bfd_set_format[bfd_object]) (abfd)) |
252b5132 | 546 | goto got_no_match; |
0c83546a | 547 | preserve.marker = elf_tdata (abfd); |
e84d6fca | 548 | |
252b5132 RH |
549 | /* Now that we know the byte order, swap in the rest of the header */ |
550 | i_ehdrp = elf_elfheader (abfd); | |
551 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
552 | #if DEBUG & 1 | |
553 | elf_debug_file (i_ehdrp); | |
554 | #endif | |
555 | ||
556 | /* Reject ET_CORE (header indicates core file, not object file) */ | |
557 | if (i_ehdrp->e_type == ET_CORE) | |
558 | goto got_wrong_format_error; | |
559 | ||
0c35f01a AM |
560 | /* If this is a relocatable file and there is no section header |
561 | table, then we're hosed. */ | |
562 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL) | |
252b5132 RH |
563 | goto got_wrong_format_error; |
564 | ||
565 | /* As a simple sanity check, verify that the what BFD thinks is the | |
566 | size of each section header table entry actually matches the size | |
0c35f01a AM |
567 | recorded in the file, but only if there are any sections. */ |
568 | if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0) | |
252b5132 RH |
569 | goto got_wrong_format_error; |
570 | ||
7ece0d85 JJ |
571 | /* Further sanity check. */ |
572 | if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0) | |
573 | goto got_wrong_format_error; | |
574 | ||
252b5132 RH |
575 | ebd = get_elf_backend_data (abfd); |
576 | ||
577 | /* Check that the ELF e_machine field matches what this particular | |
578 | BFD format expects. */ | |
579 | if (ebd->elf_machine_code != i_ehdrp->e_machine | |
e84d6fca AM |
580 | && (ebd->elf_machine_alt1 == 0 |
581 | || i_ehdrp->e_machine != ebd->elf_machine_alt1) | |
582 | && (ebd->elf_machine_alt2 == 0 | |
583 | || i_ehdrp->e_machine != ebd->elf_machine_alt2)) | |
252b5132 RH |
584 | { |
585 | const bfd_target * const *target_ptr; | |
586 | ||
587 | if (ebd->elf_machine_code != EM_NONE) | |
588 | goto got_wrong_format_error; | |
589 | ||
590 | /* This is the generic ELF target. Let it match any ELF target | |
591 | for which we do not have a specific backend. */ | |
592 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
593 | { | |
9c5bfbb7 | 594 | const struct elf_backend_data *back; |
252b5132 RH |
595 | |
596 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
597 | continue; | |
9c5bfbb7 | 598 | back = (const struct elf_backend_data *) (*target_ptr)->backend_data; |
252b5132 RH |
599 | if (back->elf_machine_code == i_ehdrp->e_machine |
600 | || (back->elf_machine_alt1 != 0 | |
601 | && back->elf_machine_alt1 == i_ehdrp->e_machine) | |
602 | || (back->elf_machine_alt2 != 0 | |
603 | && back->elf_machine_alt2 == i_ehdrp->e_machine)) | |
604 | { | |
605 | /* target_ptr is an ELF backend which matches this | |
606 | object file, so reject the generic ELF target. */ | |
607 | goto got_wrong_format_error; | |
608 | } | |
609 | } | |
610 | } | |
611 | ||
612 | if (i_ehdrp->e_type == ET_EXEC) | |
613 | abfd->flags |= EXEC_P; | |
614 | else if (i_ehdrp->e_type == ET_DYN) | |
615 | abfd->flags |= DYNAMIC; | |
616 | ||
617 | if (i_ehdrp->e_phnum > 0) | |
618 | abfd->flags |= D_PAGED; | |
619 | ||
620 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) | |
621 | { | |
622 | /* It's OK if this fails for the generic target. */ | |
623 | if (ebd->elf_machine_code != EM_NONE) | |
624 | goto got_no_match; | |
625 | } | |
626 | ||
3e932841 | 627 | /* Remember the entry point specified in the ELF file header. */ |
448cafa4 | 628 | bfd_set_start_address (abfd, i_ehdrp->e_entry); |
252b5132 | 629 | |
7ece0d85 JJ |
630 | if (i_ehdrp->e_shoff != 0) |
631 | { | |
632 | /* Seek to the section header table in the file. */ | |
633 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0) | |
634 | goto got_no_match; | |
5732c114 | 635 | |
7ece0d85 JJ |
636 | /* Read the first section header at index 0, and convert to internal |
637 | form. */ | |
268b6b39 | 638 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
7ece0d85 JJ |
639 | goto got_no_match; |
640 | elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); | |
5732c114 | 641 | |
7ece0d85 JJ |
642 | /* If the section count is zero, the actual count is in the first |
643 | section header. */ | |
644 | if (i_ehdrp->e_shnum == SHN_UNDEF) | |
645 | i_ehdrp->e_shnum = i_shdr.sh_size; | |
5732c114 | 646 | |
7ece0d85 JJ |
647 | /* And similarly for the string table index. */ |
648 | if (i_ehdrp->e_shstrndx == SHN_XINDEX) | |
649 | i_ehdrp->e_shstrndx = i_shdr.sh_link; | |
650 | } | |
5732c114 | 651 | |
252b5132 | 652 | /* Allocate space for a copy of the section header table in |
5732c114 | 653 | internal form. */ |
0c35f01a AM |
654 | if (i_ehdrp->e_shnum != 0) |
655 | { | |
5732c114 | 656 | Elf_Internal_Shdr *shdrp; |
9ad5cbcf | 657 | unsigned int num_sec; |
5732c114 | 658 | |
0c35f01a | 659 | amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum; |
268b6b39 | 660 | i_shdrp = bfd_alloc (abfd, amt); |
5732c114 AM |
661 | if (!i_shdrp) |
662 | goto got_no_match; | |
9ad5cbcf AM |
663 | num_sec = i_ehdrp->e_shnum; |
664 | if (num_sec > SHN_LORESERVE) | |
665 | num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
666 | elf_numsections (abfd) = num_sec; | |
667 | amt = sizeof (i_shdrp) * num_sec; | |
268b6b39 | 668 | elf_elfsections (abfd) = bfd_alloc (abfd, amt); |
5732c114 | 669 | if (!elf_elfsections (abfd)) |
0c35f01a | 670 | goto got_no_match; |
5732c114 AM |
671 | |
672 | memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp)); | |
673 | shdrp = i_shdrp; | |
674 | shindex = 0; | |
9ad5cbcf | 675 | if (num_sec > SHN_LORESERVE) |
5732c114 AM |
676 | { |
677 | for ( ; shindex < SHN_LORESERVE; shindex++) | |
678 | elf_elfsections (abfd)[shindex] = shdrp++; | |
679 | for ( ; shindex < SHN_HIRESERVE + 1; shindex++) | |
9ad5cbcf | 680 | elf_elfsections (abfd)[shindex] = i_shdrp; |
5732c114 | 681 | } |
9ad5cbcf | 682 | for ( ; shindex < num_sec; shindex++) |
5732c114 | 683 | elf_elfsections (abfd)[shindex] = shdrp++; |
5732c114 | 684 | |
ed591155 AM |
685 | /* Read in the rest of the section header table and convert it |
686 | to internal form. */ | |
687 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) | |
688 | { | |
268b6b39 | 689 | if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) |
ed591155 AM |
690 | goto got_no_match; |
691 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
692 | ||
693 | /* If the section is loaded, but not page aligned, clear | |
694 | D_PAGED. */ | |
695 | if (i_shdrp[shindex].sh_size != 0 | |
696 | && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0 | |
697 | && i_shdrp[shindex].sh_type != SHT_NOBITS | |
698 | && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset) | |
699 | % ebd->maxpagesize) | |
700 | != 0)) | |
701 | abfd->flags &= ~D_PAGED; | |
702 | } | |
252b5132 | 703 | } |
ed591155 | 704 | |
7ece0d85 | 705 | if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff) |
252b5132 RH |
706 | { |
707 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) | |
708 | goto got_no_match; | |
709 | } | |
710 | ||
711 | /* Read in the program headers. */ | |
712 | if (i_ehdrp->e_phnum == 0) | |
713 | elf_tdata (abfd)->phdr = NULL; | |
714 | else | |
715 | { | |
716 | Elf_Internal_Phdr *i_phdr; | |
717 | unsigned int i; | |
718 | ||
dc810e39 | 719 | amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr); |
268b6b39 | 720 | elf_tdata (abfd)->phdr = bfd_alloc (abfd, amt); |
252b5132 RH |
721 | if (elf_tdata (abfd)->phdr == NULL) |
722 | goto got_no_match; | |
dc810e39 | 723 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0) |
252b5132 RH |
724 | goto got_no_match; |
725 | i_phdr = elf_tdata (abfd)->phdr; | |
726 | for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++) | |
727 | { | |
728 | Elf_External_Phdr x_phdr; | |
729 | ||
268b6b39 | 730 | if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr) |
252b5132 RH |
731 | goto got_no_match; |
732 | elf_swap_phdr_in (abfd, &x_phdr, i_phdr); | |
733 | } | |
734 | } | |
735 | ||
736 | /* Read in the string table containing the names of the sections. We | |
3e932841 | 737 | will need the base pointer to this table later. */ |
252b5132 RH |
738 | /* We read this inline now, so that we don't have to go through |
739 | bfd_section_from_shdr with it (since this particular strtab is | |
740 | used to find all of the ELF section names.) */ | |
741 | ||
7ece0d85 | 742 | if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff) |
252b5132 | 743 | { |
9ad5cbcf AM |
744 | unsigned int num_sec; |
745 | ||
0c35f01a AM |
746 | shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
747 | if (!shstrtab) | |
252b5132 | 748 | goto got_no_match; |
0c35f01a AM |
749 | |
750 | /* Once all of the section headers have been read and converted, we | |
751 | can start processing them. Note that the first section header is | |
752 | a dummy placeholder entry, so we ignore it. */ | |
9ad5cbcf AM |
753 | num_sec = elf_numsections (abfd); |
754 | for (shindex = 1; shindex < num_sec; shindex++) | |
0c35f01a AM |
755 | { |
756 | if (! bfd_section_from_shdr (abfd, shindex)) | |
757 | goto got_no_match; | |
9ad5cbcf AM |
758 | if (shindex == SHN_LORESERVE - 1) |
759 | shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
0c35f01a | 760 | } |
252b5132 RH |
761 | } |
762 | ||
763 | /* Let the backend double check the format and override global | |
764 | information. */ | |
765 | if (ebd->elf_backend_object_p) | |
766 | { | |
82e51918 | 767 | if (! (*ebd->elf_backend_object_p) (abfd)) |
252b5132 RH |
768 | goto got_wrong_format_error; |
769 | } | |
770 | ||
771 | /* If we have created any reloc sections that are associated with | |
772 | debugging sections, mark the reloc sections as debugging as well. */ | |
773 | for (s = abfd->sections; s != NULL; s = s->next) | |
774 | { | |
775 | if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
776 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA) | |
777 | && elf_section_data (s)->this_hdr.sh_info > 0) | |
778 | { | |
779 | unsigned long targ_index; | |
780 | asection *targ_sec; | |
781 | ||
782 | targ_index = elf_section_data (s)->this_hdr.sh_info; | |
783 | targ_sec = bfd_section_from_elf_index (abfd, targ_index); | |
784 | if (targ_sec != NULL | |
785 | && (targ_sec->flags & SEC_DEBUGGING) != 0) | |
786 | s->flags |= SEC_DEBUGGING; | |
787 | } | |
788 | } | |
789 | ||
e84d6fca AM |
790 | bfd_preserve_finish (abfd, &preserve); |
791 | return abfd->xvec; | |
252b5132 RH |
792 | |
793 | got_wrong_format_error: | |
a77a9fef HPN |
794 | /* There is way too much undoing of half-known state here. The caller, |
795 | bfd_check_format_matches, really shouldn't iterate on live bfd's to | |
796 | check match/no-match like it does. We have to rely on that a call to | |
797 | bfd_default_set_arch_mach with the previously known mach, undoes what | |
798 | was done by the first bfd_default_set_arch_mach (with mach 0) here. | |
799 | For this to work, only elf-data and the mach may be changed by the | |
800 | target-specific elf_backend_object_p function. Note that saving the | |
801 | whole bfd here and restoring it would be even worse; the first thing | |
802 | you notice is that the cached bfd file position gets out of sync. */ | |
252b5132 | 803 | bfd_set_error (bfd_error_wrong_format); |
ed591155 | 804 | |
252b5132 | 805 | got_no_match: |
e84d6fca AM |
806 | if (preserve.marker != NULL) |
807 | bfd_preserve_restore (abfd, &preserve); | |
ed591155 | 808 | return NULL; |
252b5132 RH |
809 | } |
810 | \f | |
811 | /* ELF .o/exec file writing */ | |
812 | ||
813 | /* Write out the relocs. */ | |
814 | ||
b9f66672 | 815 | void |
268b6b39 | 816 | elf_write_relocs (bfd *abfd, asection *sec, void *data) |
252b5132 | 817 | { |
268b6b39 | 818 | bfd_boolean *failedp = data; |
252b5132 | 819 | Elf_Internal_Shdr *rela_hdr; |
947216bf | 820 | bfd_vma addr_offset; |
c39a58e6 | 821 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
947216bf AM |
822 | size_t extsize; |
823 | bfd_byte *dst_rela; | |
252b5132 | 824 | unsigned int idx; |
947216bf AM |
825 | asymbol *last_sym; |
826 | int last_sym_idx; | |
252b5132 RH |
827 | |
828 | /* If we have already failed, don't do anything. */ | |
829 | if (*failedp) | |
830 | return; | |
831 | ||
832 | if ((sec->flags & SEC_RELOC) == 0) | |
833 | return; | |
834 | ||
835 | /* The linker backend writes the relocs out itself, and sets the | |
836 | reloc_count field to zero to inhibit writing them here. Also, | |
837 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
838 | relocs. */ | |
839 | if (sec->reloc_count == 0) | |
840 | return; | |
841 | ||
842 | rela_hdr = &elf_section_data (sec)->rel_hdr; | |
843 | ||
844 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; | |
268b6b39 | 845 | rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size); |
252b5132 RH |
846 | if (rela_hdr->contents == NULL) |
847 | { | |
b34976b6 | 848 | *failedp = TRUE; |
252b5132 RH |
849 | return; |
850 | } | |
851 | ||
bf572ba0 MM |
852 | /* Figure out whether the relocations are RELA or REL relocations. */ |
853 | if (rela_hdr->sh_type == SHT_RELA) | |
947216bf AM |
854 | { |
855 | swap_out = elf_swap_reloca_out; | |
856 | extsize = sizeof (Elf_External_Rela); | |
857 | } | |
bf572ba0 | 858 | else if (rela_hdr->sh_type == SHT_REL) |
947216bf AM |
859 | { |
860 | swap_out = elf_swap_reloc_out; | |
861 | extsize = sizeof (Elf_External_Rel); | |
862 | } | |
bf572ba0 MM |
863 | else |
864 | /* Every relocation section should be either an SHT_RELA or an | |
865 | SHT_REL section. */ | |
866 | abort (); | |
867 | ||
947216bf AM |
868 | /* The address of an ELF reloc is section relative for an object |
869 | file, and absolute for an executable file or shared library. | |
870 | The address of a BFD reloc is always section relative. */ | |
871 | addr_offset = 0; | |
872 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
873 | addr_offset = sec->vma; | |
874 | ||
3e932841 | 875 | /* orelocation has the data, reloc_count has the count... */ |
947216bf AM |
876 | last_sym = 0; |
877 | last_sym_idx = 0; | |
878 | dst_rela = rela_hdr->contents; | |
252b5132 | 879 | |
947216bf AM |
880 | for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize) |
881 | { | |
882 | Elf_Internal_Rela src_rela; | |
883 | arelent *ptr; | |
884 | asymbol *sym; | |
885 | int n; | |
886 | ||
887 | ptr = sec->orelocation[idx]; | |
888 | sym = *ptr->sym_ptr_ptr; | |
889 | if (sym == last_sym) | |
890 | n = last_sym_idx; | |
891 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
892 | n = STN_UNDEF; | |
893 | else | |
252b5132 | 894 | { |
947216bf AM |
895 | last_sym = sym; |
896 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
897 | if (n < 0) | |
252b5132 | 898 | { |
b34976b6 | 899 | *failedp = TRUE; |
252b5132 RH |
900 | return; |
901 | } | |
947216bf | 902 | last_sym_idx = n; |
252b5132 | 903 | } |
252b5132 | 904 | |
947216bf AM |
905 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL |
906 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
907 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
252b5132 | 908 | { |
b34976b6 | 909 | *failedp = TRUE; |
947216bf | 910 | return; |
252b5132 | 911 | } |
947216bf AM |
912 | |
913 | src_rela.r_offset = ptr->address + addr_offset; | |
914 | src_rela.r_info = ELF_R_INFO (n, ptr->howto->type); | |
915 | src_rela.r_addend = ptr->addend; | |
916 | (*swap_out) (abfd, &src_rela, dst_rela); | |
252b5132 RH |
917 | } |
918 | } | |
919 | ||
920 | /* Write out the program headers. */ | |
921 | ||
922 | int | |
268b6b39 AM |
923 | elf_write_out_phdrs (bfd *abfd, |
924 | const Elf_Internal_Phdr *phdr, | |
925 | unsigned int count) | |
252b5132 RH |
926 | { |
927 | while (count--) | |
928 | { | |
929 | Elf_External_Phdr extphdr; | |
930 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
268b6b39 AM |
931 | if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd) |
932 | != sizeof (Elf_External_Phdr)) | |
252b5132 RH |
933 | return -1; |
934 | phdr++; | |
935 | } | |
936 | return 0; | |
937 | } | |
938 | ||
939 | /* Write out the section headers and the ELF file header. */ | |
940 | ||
b34976b6 | 941 | bfd_boolean |
268b6b39 | 942 | elf_write_shdrs_and_ehdr (bfd *abfd) |
252b5132 RH |
943 | { |
944 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
945 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
946 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
947 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
948 | unsigned int count; | |
dc810e39 | 949 | bfd_size_type amt; |
252b5132 RH |
950 | |
951 | i_ehdrp = elf_elfheader (abfd); | |
952 | i_shdrp = elf_elfsections (abfd); | |
953 | ||
3e932841 | 954 | /* swap the header before spitting it out... */ |
252b5132 RH |
955 | |
956 | #if DEBUG & 1 | |
957 | elf_debug_file (i_ehdrp); | |
958 | #endif | |
959 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); | |
dc810e39 | 960 | amt = sizeof (x_ehdr); |
252b5132 | 961 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
268b6b39 | 962 | || bfd_bwrite (&x_ehdr, amt, abfd) != amt) |
b34976b6 | 963 | return FALSE; |
252b5132 | 964 | |
5732c114 AM |
965 | /* Some fields in the first section header handle overflow of ehdr |
966 | fields. */ | |
967 | if (i_ehdrp->e_shnum >= SHN_LORESERVE) | |
968 | i_shdrp[0]->sh_size = i_ehdrp->e_shnum; | |
969 | if (i_ehdrp->e_shstrndx >= SHN_LORESERVE) | |
970 | i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx; | |
971 | ||
3e932841 | 972 | /* at this point we've concocted all the ELF sections... */ |
5732c114 AM |
973 | amt = i_ehdrp->e_shnum; |
974 | amt *= sizeof (*x_shdrp); | |
268b6b39 | 975 | x_shdrp = bfd_alloc (abfd, amt); |
252b5132 | 976 | if (!x_shdrp) |
b34976b6 | 977 | return FALSE; |
252b5132 | 978 | |
5732c114 | 979 | for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++) |
252b5132 RH |
980 | { |
981 | #if DEBUG & 2 | |
5732c114 | 982 | elf_debug_section (count, *i_shdrp); |
252b5132 | 983 | #endif |
5732c114 | 984 | elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count); |
b34976b6 | 985 | |
5732c114 AM |
986 | if (count == SHN_LORESERVE - 1) |
987 | i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
988 | } |
989 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 | |
268b6b39 | 990 | || bfd_bwrite (x_shdrp, amt, abfd) != amt) |
b34976b6 | 991 | return FALSE; |
252b5132 | 992 | |
3e932841 | 993 | /* need to dump the string table too... */ |
252b5132 | 994 | |
b34976b6 | 995 | return TRUE; |
252b5132 RH |
996 | } |
997 | ||
998 | long | |
268b6b39 | 999 | elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic) |
252b5132 RH |
1000 | { |
1001 | Elf_Internal_Shdr *hdr; | |
1002 | Elf_Internal_Shdr *verhdr; | |
1003 | unsigned long symcount; /* Number of external ELF symbols */ | |
1004 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
1005 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
6cdc0ccc AM |
1006 | Elf_Internal_Sym *isym; |
1007 | Elf_Internal_Sym *isymend; | |
1008 | Elf_Internal_Sym *isymbuf = NULL; | |
1009 | Elf_External_Versym *xver; | |
1010 | Elf_External_Versym *xverbuf = NULL; | |
9c5bfbb7 | 1011 | const struct elf_backend_data *ebd; |
dc810e39 | 1012 | bfd_size_type amt; |
252b5132 RH |
1013 | |
1014 | /* Read each raw ELF symbol, converting from external ELF form to | |
1015 | internal ELF form, and then using the information to create a | |
1016 | canonical bfd symbol table entry. | |
1017 | ||
1018 | Note that we allocate the initial bfd canonical symbol buffer | |
1019 | based on a one-to-one mapping of the ELF symbols to canonical | |
1020 | symbols. We actually use all the ELF symbols, so there will be no | |
1021 | space left over at the end. When we have all the symbols, we | |
3e932841 | 1022 | build the caller's pointer vector. */ |
252b5132 RH |
1023 | |
1024 | if (! dynamic) | |
1025 | { | |
1026 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1027 | verhdr = NULL; | |
1028 | } | |
1029 | else | |
1030 | { | |
1031 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1032 | if (elf_dynversym (abfd) == 0) | |
1033 | verhdr = NULL; | |
1034 | else | |
1035 | verhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1036 | if ((elf_tdata (abfd)->dynverdef_section != 0 | |
1037 | && elf_tdata (abfd)->verdef == NULL) | |
1038 | || (elf_tdata (abfd)->dynverref_section != 0 | |
1039 | && elf_tdata (abfd)->verref == NULL)) | |
1040 | { | |
1041 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1042 | return -1; | |
1043 | } | |
1044 | } | |
1045 | ||
6cdc0ccc | 1046 | ebd = get_elf_backend_data (abfd); |
252b5132 | 1047 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
252b5132 RH |
1048 | if (symcount == 0) |
1049 | sym = symbase = NULL; | |
1050 | else | |
1051 | { | |
6cdc0ccc AM |
1052 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0, |
1053 | NULL, NULL, NULL); | |
1054 | if (isymbuf == NULL) | |
1055 | return -1; | |
252b5132 | 1056 | |
dc810e39 AM |
1057 | amt = symcount; |
1058 | amt *= sizeof (elf_symbol_type); | |
268b6b39 | 1059 | symbase = bfd_zalloc (abfd, amt); |
252b5132 | 1060 | if (symbase == (elf_symbol_type *) NULL) |
9ad5cbcf | 1061 | goto error_return; |
252b5132 RH |
1062 | |
1063 | /* Read the raw ELF version symbol information. */ | |
252b5132 RH |
1064 | if (verhdr != NULL |
1065 | && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount) | |
1066 | { | |
1067 | (*_bfd_error_handler) | |
1068 | (_("%s: version count (%ld) does not match symbol count (%ld)"), | |
1069 | abfd->filename, | |
1070 | (long) (verhdr->sh_size / sizeof (Elf_External_Versym)), | |
1071 | symcount); | |
1072 | ||
1073 | /* Slurp in the symbols without the version information, | |
1074 | since that is more helpful than just quitting. */ | |
1075 | verhdr = NULL; | |
1076 | } | |
1077 | ||
1078 | if (verhdr != NULL) | |
1079 | { | |
1080 | if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0) | |
1081 | goto error_return; | |
1082 | ||
268b6b39 | 1083 | xverbuf = bfd_malloc (verhdr->sh_size); |
6cdc0ccc | 1084 | if (xverbuf == NULL && verhdr->sh_size != 0) |
252b5132 RH |
1085 | goto error_return; |
1086 | ||
268b6b39 | 1087 | if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size) |
252b5132 RH |
1088 | goto error_return; |
1089 | } | |
1090 | ||
1091 | /* Skip first symbol, which is a null dummy. */ | |
6cdc0ccc AM |
1092 | xver = xverbuf; |
1093 | if (xver != NULL) | |
1094 | ++xver; | |
1095 | isymend = isymbuf + symcount; | |
1096 | for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++) | |
252b5132 | 1097 | { |
6cdc0ccc | 1098 | memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym)); |
252b5132 RH |
1099 | sym->symbol.the_bfd = abfd; |
1100 | ||
1101 | sym->symbol.name = bfd_elf_string_from_elf_section (abfd, | |
1102 | hdr->sh_link, | |
6cdc0ccc | 1103 | isym->st_name); |
252b5132 | 1104 | |
6cdc0ccc | 1105 | sym->symbol.value = isym->st_value; |
252b5132 | 1106 | |
6cdc0ccc | 1107 | if (isym->st_shndx == SHN_UNDEF) |
9ad5cbcf AM |
1108 | { |
1109 | sym->symbol.section = bfd_und_section_ptr; | |
1110 | } | |
6cdc0ccc AM |
1111 | else if (isym->st_shndx < SHN_LORESERVE |
1112 | || isym->st_shndx > SHN_HIRESERVE) | |
252b5132 RH |
1113 | { |
1114 | sym->symbol.section = section_from_elf_index (abfd, | |
6cdc0ccc | 1115 | isym->st_shndx); |
252b5132 RH |
1116 | if (sym->symbol.section == NULL) |
1117 | { | |
1118 | /* This symbol is in a section for which we did not | |
1119 | create a BFD section. Just use bfd_abs_section, | |
1120 | although it is wrong. FIXME. */ | |
1121 | sym->symbol.section = bfd_abs_section_ptr; | |
1122 | } | |
1123 | } | |
6cdc0ccc | 1124 | else if (isym->st_shndx == SHN_ABS) |
252b5132 RH |
1125 | { |
1126 | sym->symbol.section = bfd_abs_section_ptr; | |
1127 | } | |
6cdc0ccc | 1128 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1129 | { |
1130 | sym->symbol.section = bfd_com_section_ptr; | |
1131 | /* Elf puts the alignment into the `value' field, and | |
1132 | the size into the `size' field. BFD wants to see the | |
1133 | size in the value field, and doesn't care (at the | |
1134 | moment) about the alignment. */ | |
6cdc0ccc | 1135 | sym->symbol.value = isym->st_size; |
252b5132 | 1136 | } |
252b5132 RH |
1137 | else |
1138 | sym->symbol.section = bfd_abs_section_ptr; | |
1139 | ||
1049f94e | 1140 | /* If this is a relocatable file, then the symbol value is |
252b5132 RH |
1141 | already section relative. */ |
1142 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1143 | sym->symbol.value -= sym->symbol.section->vma; | |
1144 | ||
6cdc0ccc | 1145 | switch (ELF_ST_BIND (isym->st_info)) |
252b5132 RH |
1146 | { |
1147 | case STB_LOCAL: | |
1148 | sym->symbol.flags |= BSF_LOCAL; | |
1149 | break; | |
1150 | case STB_GLOBAL: | |
6cdc0ccc | 1151 | if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON) |
252b5132 RH |
1152 | sym->symbol.flags |= BSF_GLOBAL; |
1153 | break; | |
1154 | case STB_WEAK: | |
1155 | sym->symbol.flags |= BSF_WEAK; | |
1156 | break; | |
1157 | } | |
1158 | ||
6cdc0ccc | 1159 | switch (ELF_ST_TYPE (isym->st_info)) |
252b5132 RH |
1160 | { |
1161 | case STT_SECTION: | |
1162 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
1163 | break; | |
1164 | case STT_FILE: | |
1165 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
1166 | break; | |
1167 | case STT_FUNC: | |
1168 | sym->symbol.flags |= BSF_FUNCTION; | |
1169 | break; | |
1170 | case STT_OBJECT: | |
1171 | sym->symbol.flags |= BSF_OBJECT; | |
1172 | break; | |
1173 | } | |
1174 | ||
1175 | if (dynamic) | |
1176 | sym->symbol.flags |= BSF_DYNAMIC; | |
1177 | ||
6cdc0ccc | 1178 | if (xver != NULL) |
252b5132 RH |
1179 | { |
1180 | Elf_Internal_Versym iversym; | |
1181 | ||
6cdc0ccc | 1182 | _bfd_elf_swap_versym_in (abfd, xver, &iversym); |
252b5132 | 1183 | sym->version = iversym.vs_vers; |
6cdc0ccc | 1184 | xver++; |
252b5132 RH |
1185 | } |
1186 | ||
1187 | /* Do some backend-specific processing on this symbol. */ | |
6cdc0ccc AM |
1188 | if (ebd->elf_backend_symbol_processing) |
1189 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
252b5132 RH |
1190 | } |
1191 | } | |
1192 | ||
1193 | /* Do some backend-specific processing on this symbol table. */ | |
6cdc0ccc AM |
1194 | if (ebd->elf_backend_symbol_table_processing) |
1195 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
252b5132 RH |
1196 | |
1197 | /* We rely on the zalloc to clear out the final symbol entry. */ | |
1198 | ||
1199 | symcount = sym - symbase; | |
1200 | ||
1201 | /* Fill in the user's symbol pointer vector if needed. */ | |
1202 | if (symptrs) | |
1203 | { | |
1204 | long l = symcount; | |
1205 | ||
1206 | sym = symbase; | |
1207 | while (l-- > 0) | |
1208 | { | |
1209 | *symptrs++ = &sym->symbol; | |
1210 | sym++; | |
1211 | } | |
1212 | *symptrs = 0; /* Final null pointer */ | |
1213 | } | |
1214 | ||
6cdc0ccc AM |
1215 | if (xverbuf != NULL) |
1216 | free (xverbuf); | |
1217 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1218 | free (isymbuf); | |
252b5132 | 1219 | return symcount; |
9ad5cbcf | 1220 | |
252b5132 | 1221 | error_return: |
6cdc0ccc AM |
1222 | if (xverbuf != NULL) |
1223 | free (xverbuf); | |
1224 | if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf) | |
1225 | free (isymbuf); | |
252b5132 RH |
1226 | return -1; |
1227 | } | |
1228 | ||
60bcf0fa | 1229 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of |
42fdc509 | 1230 | them. */ |
252b5132 | 1231 | |
b34976b6 | 1232 | static bfd_boolean |
268b6b39 AM |
1233 | elf_slurp_reloc_table_from_section (bfd *abfd, |
1234 | asection *asect, | |
1235 | Elf_Internal_Shdr *rel_hdr, | |
1236 | bfd_size_type reloc_count, | |
1237 | arelent *relents, | |
1238 | asymbol **symbols, | |
1239 | bfd_boolean dynamic) | |
252b5132 | 1240 | { |
9c5bfbb7 | 1241 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
268b6b39 | 1242 | void *allocated = NULL; |
252b5132 | 1243 | bfd_byte *native_relocs; |
252b5132 RH |
1244 | arelent *relent; |
1245 | unsigned int i; | |
1246 | int entsize; | |
5ad8645c | 1247 | unsigned int symcount; |
252b5132 | 1248 | |
268b6b39 | 1249 | allocated = bfd_malloc (rel_hdr->sh_size); |
252b5132 RH |
1250 | if (allocated == NULL) |
1251 | goto error_return; | |
1252 | ||
1253 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
dc810e39 | 1254 | || (bfd_bread (allocated, rel_hdr->sh_size, abfd) |
252b5132 RH |
1255 | != rel_hdr->sh_size)) |
1256 | goto error_return; | |
1257 | ||
268b6b39 | 1258 | native_relocs = allocated; |
252b5132 | 1259 | |
252b5132 RH |
1260 | entsize = rel_hdr->sh_entsize; |
1261 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
1262 | || entsize == sizeof (Elf_External_Rela)); | |
1263 | ||
5ad8645c AM |
1264 | if (dynamic) |
1265 | symcount = bfd_get_dynamic_symcount (abfd); | |
1266 | else | |
1267 | symcount = bfd_get_symcount (abfd); | |
1268 | ||
252b5132 RH |
1269 | for (i = 0, relent = relents; |
1270 | i < reloc_count; | |
1271 | i++, relent++, native_relocs += entsize) | |
1272 | { | |
1273 | Elf_Internal_Rela rela; | |
252b5132 RH |
1274 | |
1275 | if (entsize == sizeof (Elf_External_Rela)) | |
947216bf | 1276 | elf_swap_reloca_in (abfd, native_relocs, &rela); |
252b5132 | 1277 | else |
947216bf | 1278 | elf_swap_reloc_in (abfd, native_relocs, &rela); |
252b5132 RH |
1279 | |
1280 | /* The address of an ELF reloc is section relative for an object | |
1281 | file, and absolute for an executable file or shared library. | |
1282 | The address of a normal BFD reloc is always section relative, | |
1283 | and the address of a dynamic reloc is absolute.. */ | |
1284 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
1285 | relent->address = rela.r_offset; | |
1286 | else | |
1287 | relent->address = rela.r_offset - asect->vma; | |
1288 | ||
1289 | if (ELF_R_SYM (rela.r_info) == 0) | |
1290 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
05a487dc | 1291 | else if (ELF_R_SYM (rela.r_info) > symcount) |
1f70368c DJ |
1292 | { |
1293 | (*_bfd_error_handler) | |
1294 | (_("%s(%s): relocation %d has invalid symbol index %ld"), | |
1295 | abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info)); | |
1296 | relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
1297 | } | |
252b5132 RH |
1298 | else |
1299 | { | |
1300 | asymbol **ps, *s; | |
1301 | ||
1302 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; | |
1303 | s = *ps; | |
1304 | ||
1305 | /* Canonicalize ELF section symbols. FIXME: Why? */ | |
1306 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
1307 | relent->sym_ptr_ptr = ps; | |
1308 | else | |
1309 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
1310 | } | |
1311 | ||
1312 | relent->addend = rela.r_addend; | |
1313 | ||
90fff0d4 DJ |
1314 | if ((entsize == sizeof (Elf_External_Rela) |
1315 | && ebd->elf_info_to_howto != NULL) | |
1316 | || ebd->elf_info_to_howto_rel == NULL) | |
252b5132 RH |
1317 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); |
1318 | else | |
947216bf | 1319 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela); |
252b5132 RH |
1320 | } |
1321 | ||
252b5132 RH |
1322 | if (allocated != NULL) |
1323 | free (allocated); | |
1324 | ||
b34976b6 | 1325 | return TRUE; |
252b5132 RH |
1326 | |
1327 | error_return: | |
1328 | if (allocated != NULL) | |
1329 | free (allocated); | |
b34976b6 | 1330 | return FALSE; |
252b5132 RH |
1331 | } |
1332 | ||
42fdc509 MM |
1333 | /* Read in and swap the external relocs. */ |
1334 | ||
b34976b6 | 1335 | bfd_boolean |
268b6b39 AM |
1336 | elf_slurp_reloc_table (bfd *abfd, |
1337 | asection *asect, | |
1338 | asymbol **symbols, | |
1339 | bfd_boolean dynamic) | |
42fdc509 MM |
1340 | { |
1341 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
1342 | Elf_Internal_Shdr *rel_hdr; | |
1343 | Elf_Internal_Shdr *rel_hdr2; | |
1344 | bfd_size_type reloc_count; | |
1345 | bfd_size_type reloc_count2; | |
1346 | arelent *relents; | |
dc810e39 | 1347 | bfd_size_type amt; |
42fdc509 MM |
1348 | |
1349 | if (asect->relocation != NULL) | |
b34976b6 | 1350 | return TRUE; |
42fdc509 MM |
1351 | |
1352 | if (! dynamic) | |
1353 | { | |
1354 | if ((asect->flags & SEC_RELOC) == 0 | |
1355 | || asect->reloc_count == 0) | |
b34976b6 | 1356 | return TRUE; |
42fdc509 MM |
1357 | |
1358 | rel_hdr = &d->rel_hdr; | |
d9bc7a44 | 1359 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1360 | rel_hdr2 = d->rel_hdr2; |
d9bc7a44 | 1361 | reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0); |
42fdc509 MM |
1362 | |
1363 | BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2); | |
1364 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
1365 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
1366 | ||
1367 | } | |
1368 | else | |
1369 | { | |
57e21bef MM |
1370 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this |
1371 | case because relocations against this section may use the | |
1372 | dynamic symbol table, and in that case bfd_section_from_shdr | |
1373 | in elf.c does not update the RELOC_COUNT. */ | |
42fdc509 | 1374 | if (asect->_raw_size == 0) |
b34976b6 | 1375 | return TRUE; |
42fdc509 MM |
1376 | |
1377 | rel_hdr = &d->this_hdr; | |
d9bc7a44 | 1378 | reloc_count = NUM_SHDR_ENTRIES (rel_hdr); |
42fdc509 | 1379 | rel_hdr2 = NULL; |
57e21bef | 1380 | reloc_count2 = 0; |
42fdc509 MM |
1381 | } |
1382 | ||
dc810e39 | 1383 | amt = (reloc_count + reloc_count2) * sizeof (arelent); |
268b6b39 | 1384 | relents = bfd_alloc (abfd, amt); |
42fdc509 | 1385 | if (relents == NULL) |
b34976b6 | 1386 | return FALSE; |
42fdc509 MM |
1387 | |
1388 | if (!elf_slurp_reloc_table_from_section (abfd, asect, | |
1389 | rel_hdr, reloc_count, | |
1390 | relents, | |
1391 | symbols, dynamic)) | |
b34976b6 | 1392 | return FALSE; |
60bcf0fa NC |
1393 | |
1394 | if (rel_hdr2 | |
42fdc509 MM |
1395 | && !elf_slurp_reloc_table_from_section (abfd, asect, |
1396 | rel_hdr2, reloc_count2, | |
1397 | relents + reloc_count, | |
1398 | symbols, dynamic)) | |
b34976b6 | 1399 | return FALSE; |
42fdc509 | 1400 | |
42fdc509 | 1401 | asect->relocation = relents; |
b34976b6 | 1402 | return TRUE; |
42fdc509 MM |
1403 | } |
1404 | ||
252b5132 RH |
1405 | #ifdef DEBUG |
1406 | static void | |
268b6b39 | 1407 | elf_debug_section (int num, Elf_Internal_Shdr *hdr) |
252b5132 RH |
1408 | { |
1409 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, | |
1410 | hdr->bfd_section != NULL ? hdr->bfd_section->name : "", | |
1411 | (long) hdr); | |
1412 | fprintf (stderr, | |
1413 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
1414 | (long) hdr->sh_name, | |
1415 | (long) hdr->sh_type, | |
1416 | (long) hdr->sh_flags); | |
1417 | fprintf (stderr, | |
1418 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
1419 | (long) hdr->sh_addr, | |
1420 | (long) hdr->sh_offset, | |
1421 | (long) hdr->sh_size); | |
1422 | fprintf (stderr, | |
1423 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
1424 | (long) hdr->sh_link, | |
1425 | (long) hdr->sh_info, | |
1426 | (long) hdr->sh_addralign); | |
1427 | fprintf (stderr, "sh_entsize = %ld\n", | |
1428 | (long) hdr->sh_entsize); | |
1429 | fflush (stderr); | |
1430 | } | |
1431 | ||
1432 | static void | |
268b6b39 | 1433 | elf_debug_file (Elf_Internal_Ehdr *ehdrp) |
252b5132 RH |
1434 | { |
1435 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
1436 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
1437 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
1438 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
1439 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
1440 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
1441 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
1442 | } | |
1443 | ||
1444 | static char * | |
268b6b39 | 1445 | elf_symbol_flags (flagword flags) |
252b5132 RH |
1446 | { |
1447 | static char buffer[1024]; | |
1448 | ||
1449 | buffer[0] = '\0'; | |
1450 | if (flags & BSF_LOCAL) | |
1451 | strcat (buffer, " local"); | |
1452 | ||
1453 | if (flags & BSF_GLOBAL) | |
1454 | strcat (buffer, " global"); | |
1455 | ||
1456 | if (flags & BSF_DEBUGGING) | |
1457 | strcat (buffer, " debug"); | |
1458 | ||
1459 | if (flags & BSF_FUNCTION) | |
1460 | strcat (buffer, " function"); | |
1461 | ||
1462 | if (flags & BSF_KEEP) | |
1463 | strcat (buffer, " keep"); | |
1464 | ||
1465 | if (flags & BSF_KEEP_G) | |
1466 | strcat (buffer, " keep_g"); | |
1467 | ||
1468 | if (flags & BSF_WEAK) | |
1469 | strcat (buffer, " weak"); | |
1470 | ||
1471 | if (flags & BSF_SECTION_SYM) | |
1472 | strcat (buffer, " section-sym"); | |
1473 | ||
1474 | if (flags & BSF_OLD_COMMON) | |
1475 | strcat (buffer, " old-common"); | |
1476 | ||
1477 | if (flags & BSF_NOT_AT_END) | |
1478 | strcat (buffer, " not-at-end"); | |
1479 | ||
1480 | if (flags & BSF_CONSTRUCTOR) | |
1481 | strcat (buffer, " constructor"); | |
1482 | ||
1483 | if (flags & BSF_WARNING) | |
1484 | strcat (buffer, " warning"); | |
1485 | ||
1486 | if (flags & BSF_INDIRECT) | |
1487 | strcat (buffer, " indirect"); | |
1488 | ||
1489 | if (flags & BSF_FILE) | |
1490 | strcat (buffer, " file"); | |
1491 | ||
1492 | if (flags & DYNAMIC) | |
1493 | strcat (buffer, " dynamic"); | |
1494 | ||
1495 | if (flags & ~(BSF_LOCAL | |
1496 | | BSF_GLOBAL | |
1497 | | BSF_DEBUGGING | |
1498 | | BSF_FUNCTION | |
1499 | | BSF_KEEP | |
1500 | | BSF_KEEP_G | |
1501 | | BSF_WEAK | |
1502 | | BSF_SECTION_SYM | |
1503 | | BSF_OLD_COMMON | |
1504 | | BSF_NOT_AT_END | |
1505 | | BSF_CONSTRUCTOR | |
1506 | | BSF_WARNING | |
1507 | | BSF_INDIRECT | |
1508 | | BSF_FILE | |
1509 | | BSF_DYNAMIC)) | |
1510 | strcat (buffer, " unknown-bits"); | |
1511 | ||
1512 | return buffer; | |
1513 | } | |
1514 | #endif | |
1515 | \f | |
8d6337fe RM |
1516 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, |
1517 | reconstruct an ELF file by reading the segments out of remote memory | |
1518 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
1519 | points to. If not null, *LOADBASEP is filled in with the difference | |
1520 | between the VMAs from which the segments were read, and the VMAs the | |
1521 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
1522 | ||
1523 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
1524 | remote memory at target address VMA into the local buffer at MYADDR; it | |
1525 | should return zero on success or an `errno' code on failure. TEMPL must | |
1526 | be a BFD for a target with the word size and byte order found in the | |
1527 | remote memory. */ | |
1528 | ||
1529 | bfd * | |
268b6b39 AM |
1530 | NAME(_bfd_elf,bfd_from_remote_memory) |
1531 | (bfd *templ, | |
1532 | bfd_vma ehdr_vma, | |
1533 | bfd_vma *loadbasep, | |
1534 | int (*target_read_memory) (bfd_vma, char *, int)) | |
8d6337fe RM |
1535 | { |
1536 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1537 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
1538 | Elf_External_Phdr *x_phdrs; | |
1539 | Elf_Internal_Phdr *i_phdrs, *last_phdr; | |
1540 | bfd *nbfd; | |
1541 | struct bfd_in_memory *bim; | |
1542 | int contents_size; | |
1543 | char *contents; | |
1544 | int err; | |
1545 | unsigned int i; | |
1546 | bfd_vma loadbase; | |
1547 | ||
1548 | /* Read in the ELF header in external format. */ | |
1549 | err = target_read_memory (ehdr_vma, (char *) &x_ehdr, sizeof x_ehdr); | |
1550 | if (err) | |
1551 | { | |
1552 | bfd_set_error (bfd_error_system_call); | |
1553 | errno = err; | |
1554 | return NULL; | |
1555 | } | |
1556 | ||
1557 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
1558 | make use of. The magic number must match, the address size ('class') | |
1559 | and byte-swapping must match our XVEC entry. */ | |
1560 | ||
1561 | if (! elf_file_p (&x_ehdr) | |
1562 | || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT | |
1563 | || x_ehdr.e_ident[EI_CLASS] != ELFCLASS) | |
1564 | { | |
1565 | bfd_set_error (bfd_error_wrong_format); | |
1566 | return NULL; | |
1567 | } | |
1568 | ||
1569 | /* Check that file's byte order matches xvec's */ | |
1570 | switch (x_ehdr.e_ident[EI_DATA]) | |
1571 | { | |
1572 | case ELFDATA2MSB: /* Big-endian */ | |
1573 | if (! bfd_header_big_endian (templ)) | |
1574 | { | |
1575 | bfd_set_error (bfd_error_wrong_format); | |
1576 | return NULL; | |
1577 | } | |
1578 | break; | |
1579 | case ELFDATA2LSB: /* Little-endian */ | |
1580 | if (! bfd_header_little_endian (templ)) | |
1581 | { | |
1582 | bfd_set_error (bfd_error_wrong_format); | |
1583 | return NULL; | |
1584 | } | |
1585 | break; | |
1586 | case ELFDATANONE: /* No data encoding specified */ | |
1587 | default: /* Unknown data encoding specified */ | |
1588 | bfd_set_error (bfd_error_wrong_format); | |
1589 | return NULL; | |
1590 | } | |
1591 | ||
1592 | elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr); | |
1593 | ||
1594 | /* The file header tells where to find the program headers. | |
1595 | These are what we use to actually choose what to read. */ | |
1596 | ||
1597 | if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0) | |
1598 | { | |
1599 | bfd_set_error (bfd_error_wrong_format); | |
1600 | return NULL; | |
1601 | } | |
1602 | ||
268b6b39 | 1603 | x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs)); |
8d6337fe RM |
1604 | if (x_phdrs == NULL) |
1605 | { | |
1606 | bfd_set_error (bfd_error_no_memory); | |
1607 | return NULL; | |
1608 | } | |
1609 | err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (char *) x_phdrs, | |
1610 | i_ehdr.e_phnum * sizeof x_phdrs[0]); | |
1611 | if (err) | |
1612 | { | |
1613 | free (x_phdrs); | |
1614 | bfd_set_error (bfd_error_system_call); | |
1615 | errno = err; | |
1616 | return NULL; | |
1617 | } | |
1618 | i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum]; | |
1619 | ||
1620 | contents_size = 0; | |
1621 | last_phdr = NULL; | |
1622 | loadbase = ehdr_vma; | |
1623 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1624 | { | |
1625 | elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]); | |
1626 | if (i_phdrs[i].p_type == PT_LOAD) | |
1627 | { | |
1628 | bfd_vma segment_end; | |
1629 | segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1630 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1631 | if (segment_end > (bfd_vma) contents_size) | |
1632 | contents_size = segment_end; | |
1633 | ||
1634 | if ((i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0) | |
1635 | loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align); | |
1636 | ||
1637 | last_phdr = &i_phdrs[i]; | |
1638 | } | |
1639 | } | |
1640 | if (last_phdr == NULL) | |
1641 | { | |
1642 | /* There were no PT_LOAD segments, so we don't have anything to read. */ | |
1643 | free (x_phdrs); | |
1644 | bfd_set_error (bfd_error_wrong_format); | |
1645 | return NULL; | |
1646 | } | |
1647 | ||
1648 | /* Trim the last segment so we don't bother with zeros in the last page | |
1649 | that are off the end of the file. However, if the extra bit in that | |
1650 | page includes the section headers, keep them. */ | |
1651 | if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz | |
1652 | && (bfd_vma) contents_size >= (i_ehdr.e_shoff | |
1653 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1654 | { | |
1655 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1656 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1657 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1658 | contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize; | |
1659 | } | |
1660 | else | |
1661 | contents_size = last_phdr->p_offset + last_phdr->p_filesz; | |
1662 | ||
1663 | /* Now we know the size of the whole image we want read in. */ | |
268b6b39 | 1664 | contents = bfd_zmalloc (contents_size); |
8d6337fe RM |
1665 | if (contents == NULL) |
1666 | { | |
1667 | free (x_phdrs); | |
1668 | bfd_set_error (bfd_error_no_memory); | |
1669 | return NULL; | |
1670 | } | |
1671 | ||
1672 | for (i = 0; i < i_ehdr.e_phnum; ++i) | |
1673 | if (i_phdrs[i].p_type == PT_LOAD) | |
1674 | { | |
1675 | bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align; | |
1676 | bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz | |
1677 | + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align; | |
1678 | if (end > (bfd_vma) contents_size) | |
1679 | end = contents_size; | |
1680 | err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr) | |
1681 | & -i_phdrs[i].p_align, | |
1682 | contents + start, end - start); | |
1683 | if (err) | |
1684 | { | |
1685 | free (x_phdrs); | |
1686 | free (contents); | |
1687 | bfd_set_error (bfd_error_system_call); | |
1688 | errno = err; | |
1689 | return NULL; | |
1690 | } | |
1691 | } | |
1692 | free (x_phdrs); | |
1693 | ||
1694 | /* If the segments visible in memory didn't include the section headers, | |
1695 | then clear them from the file header. */ | |
1696 | if ((bfd_vma) contents_size < (i_ehdr.e_shoff | |
1697 | + i_ehdr.e_shnum * i_ehdr.e_shentsize)) | |
1698 | { | |
1699 | memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff); | |
1700 | memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum); | |
1701 | memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx); | |
1702 | } | |
1703 | ||
1704 | /* This will normally have been in the first PT_LOAD segment. But it | |
1705 | conceivably could be missing, and we might have just changed it. */ | |
1706 | memcpy (contents, &x_ehdr, sizeof x_ehdr); | |
1707 | ||
1708 | /* Now we have a memory image of the ELF file contents. Make a BFD. */ | |
268b6b39 | 1709 | bim = bfd_malloc (sizeof (struct bfd_in_memory)); |
8d6337fe RM |
1710 | if (bim == NULL) |
1711 | { | |
1712 | free (contents); | |
1713 | bfd_set_error (bfd_error_no_memory); | |
1714 | return NULL; | |
1715 | } | |
1716 | nbfd = _bfd_new_bfd (); | |
1717 | if (nbfd == NULL) | |
1718 | { | |
1719 | free (bim); | |
1720 | free (contents); | |
1721 | bfd_set_error (bfd_error_no_memory); | |
1722 | return NULL; | |
1723 | } | |
1724 | nbfd->filename = "<in-memory>"; | |
1725 | nbfd->xvec = templ->xvec; | |
1726 | bim->size = contents_size; | |
1727 | bim->buffer = contents; | |
268b6b39 | 1728 | nbfd->iostream = bim; |
8d6337fe RM |
1729 | nbfd->flags = BFD_IN_MEMORY; |
1730 | nbfd->direction = read_direction; | |
1731 | nbfd->mtime = time (NULL); | |
1732 | nbfd->mtime_set = TRUE; | |
1733 | ||
1734 | if (loadbasep) | |
1735 | *loadbasep = loadbase; | |
1736 | return nbfd; | |
1737 | } | |
1738 | \f | |
252b5132 RH |
1739 | #include "elfcore.h" |
1740 | #include "elflink.h" | |
1741 | \f | |
1742 | /* Size-dependent data and functions. */ | |
1743 | const struct elf_size_info NAME(_bfd_elf,size_info) = { | |
1744 | sizeof (Elf_External_Ehdr), | |
1745 | sizeof (Elf_External_Phdr), | |
1746 | sizeof (Elf_External_Shdr), | |
1747 | sizeof (Elf_External_Rel), | |
1748 | sizeof (Elf_External_Rela), | |
1749 | sizeof (Elf_External_Sym), | |
1750 | sizeof (Elf_External_Dyn), | |
1751 | sizeof (Elf_External_Note), | |
70bcb145 | 1752 | 4, |
c7ac6ff8 | 1753 | 1, |
45d6a902 | 1754 | ARCH_SIZE, LOG_FILE_ALIGN, |
252b5132 RH |
1755 | ELFCLASS, EV_CURRENT, |
1756 | elf_write_out_phdrs, | |
1757 | elf_write_shdrs_and_ehdr, | |
b9f66672 | 1758 | elf_write_relocs, |
73ff0d56 | 1759 | elf_swap_symbol_in, |
252b5132 RH |
1760 | elf_swap_symbol_out, |
1761 | elf_slurp_reloc_table, | |
1762 | elf_slurp_symbol_table, | |
c7ac6ff8 MM |
1763 | elf_swap_dyn_in, |
1764 | elf_swap_dyn_out, | |
947216bf AM |
1765 | elf_swap_reloc_in, |
1766 | elf_swap_reloc_out, | |
1767 | elf_swap_reloca_in, | |
1768 | elf_swap_reloca_out | |
252b5132 | 1769 | }; |