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244ffee7 JK |
1 | /* ELF executable support for BFD. |
2 | Copyright 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
16 | This file is part of BFD, the Binary File Descriptor library. | |
17 | ||
18 | This program is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or | |
21 | (at your option) any later version. | |
22 | ||
23 | This program is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
244ffee7 JK |
32 | /* Problems and other issues to resolve. |
33 | ||
34 | (1) BFD expects there to be some fixed number of "sections" in | |
35 | the object file. I.E. there is a "section_count" variable in the | |
36 | bfd structure which contains the number of sections. However, ELF | |
37 | supports multiple "views" of a file. In particular, with current | |
38 | implementations, executable files typically have two tables, a | |
39 | program header table and a section header table, both of which | |
40 | partition the executable. | |
41 | ||
42 | In ELF-speak, the "linking view" of the file uses the section header | |
43 | table to access "sections" within the file, and the "execution view" | |
44 | uses the program header table to access "segments" within the file. | |
45 | "Segments" typically may contain all the data from one or more | |
46 | "sections". | |
47 | ||
48 | Note that the section header table is optional in ELF executables, | |
49 | but it is this information that is most useful to gdb. If the | |
50 | section header table is missing, then gdb should probably try | |
51 | to make do with the program header table. (FIXME) | |
52 | ||
6a3eb9b6 KR |
53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
54 | once in 64-bit mode. More of it should be made size-independent | |
55 | and moved into elf.c. | |
56 | ||
d24928c0 KR |
57 | (3) ELF section symbols are handled rather sloppily now. This should |
58 | be cleaned up, and ELF section symbols reconciled with BFD section | |
59 | symbols. | |
60 | */ | |
244ffee7 | 61 | |
32090b8e | 62 | #include <assert.h> |
244ffee7 JK |
63 | #include <string.h> /* For strrchr and friends */ |
64 | #include "bfd.h" | |
65 | #include "sysdep.h" | |
66 | #include "libbfd.h" | |
67 | #include "libelf.h" | |
68 | ||
300adb31 KR |
69 | #ifndef alloca |
70 | PTR alloca (); | |
71 | #endif | |
72 | ||
32090b8e | 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
79 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
244ffee7 | 80 | |
244ffee7 JK |
81 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
82 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
83 | #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p) | |
84 | #define elf_object_p NAME(bfd_elf,object_p) | |
85 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 JK |
86 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
87 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
88 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
89 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
90 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
91 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
92 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
93 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
94 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
95 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
96 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
97 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
98 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
99 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 100 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 101 | #define write_relocs NAME(bfd_elf,_write_relocs) |
244ffee7 | 102 | |
6a3eb9b6 KR |
103 | #if ARCH_SIZE == 64 |
104 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
105 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
32090b8e | 106 | #define ELFCLASS ELFCLASS64 |
6a3eb9b6 KR |
107 | #endif |
108 | #if ARCH_SIZE == 32 | |
109 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
110 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
32090b8e | 111 | #define ELFCLASS ELFCLASS32 |
244ffee7 JK |
112 | #endif |
113 | ||
32090b8e KR |
114 | static int shstrtab_length_fixed; |
115 | ||
116 | struct elf_sect_data { | |
117 | int reloc_sec; | |
118 | /* more? */ | |
119 | }; | |
120 | ||
244ffee7 JK |
121 | /* Forward declarations of static functions */ |
122 | ||
244ffee7 JK |
123 | static struct sec * section_from_elf_index PARAMS ((bfd *, int)); |
124 | ||
125 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
126 | ||
127 | static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); | |
128 | ||
244ffee7 JK |
129 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
130 | struct symbol_cache_entry **)); | |
131 | ||
238ac6ec | 132 | static void elf_map_symbols PARAMS ((bfd *)); |
32090b8e | 133 | static void swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 134 | |
6a3eb9b6 KR |
135 | #ifdef DEBUG |
136 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
137 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
138 | #endif | |
238ac6ec | 139 | |
32090b8e KR |
140 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
141 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
142 | ||
143 | \f | |
144 | /* Structure swapping routines */ | |
145 | ||
6a3eb9b6 KR |
146 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
147 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
148 | #if ARCH_SIZE == 64 |
149 | #define put_word bfd_h_put_64 | |
150 | #define get_word bfd_h_get_64 | |
151 | #endif | |
152 | #if ARCH_SIZE == 32 | |
153 | #define put_word bfd_h_put_32 | |
154 | #define get_word bfd_h_get_32 | |
155 | #endif | |
156 | ||
244ffee7 JK |
157 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
158 | format. */ | |
159 | ||
160 | static void | |
161 | DEFUN (elf_swap_symbol_in, (abfd, src, dst), | |
162 | bfd * abfd AND | |
163 | Elf_External_Sym * src AND | |
164 | Elf_Internal_Sym * dst) | |
165 | { | |
166 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
167 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
168 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
169 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
170 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
171 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
172 | } | |
173 | ||
174 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
175 | format. */ | |
176 | ||
177 | static void | |
178 | DEFUN (elf_swap_symbol_out, (abfd, src, dst), | |
179 | bfd * abfd AND | |
180 | Elf_Internal_Sym * src AND | |
181 | Elf_External_Sym * dst) | |
182 | { | |
183 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
184 | put_word (abfd, src->st_value, dst->st_value); |
185 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
186 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
187 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
188 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
189 | } | |
190 | ||
191 | ||
192 | /* Translate an ELF file header in external format into an ELF file header in | |
193 | internal format. */ | |
194 | ||
195 | static void | |
196 | DEFUN (elf_swap_ehdr_in, (abfd, src, dst), | |
197 | bfd * abfd AND | |
198 | Elf_External_Ehdr * src AND | |
199 | Elf_Internal_Ehdr * dst) | |
200 | { | |
201 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
202 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
203 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
204 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
205 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
206 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
207 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
208 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
209 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
210 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
211 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
212 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
213 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
214 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
215 | } | |
216 | ||
217 | /* Translate an ELF file header in internal format into an ELF file header in | |
218 | external format. */ | |
219 | ||
220 | static void | |
221 | DEFUN (elf_swap_ehdr_out, (abfd, src, dst), | |
222 | bfd * abfd AND | |
223 | Elf_Internal_Ehdr * src AND | |
224 | Elf_External_Ehdr * dst) | |
225 | { | |
226 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
227 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
228 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
229 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
230 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
231 | put_word (abfd, src->e_entry, dst->e_entry); |
232 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
233 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
234 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
235 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
236 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
237 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
238 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
239 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
240 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
241 | } | |
242 | ||
243 | ||
244 | /* Translate an ELF section header table entry in external format into an | |
245 | ELF section header table entry in internal format. */ | |
246 | ||
247 | static void | |
248 | DEFUN (elf_swap_shdr_in, (abfd, src, dst), | |
249 | bfd * abfd AND | |
250 | Elf_External_Shdr * src AND | |
251 | Elf_Internal_Shdr * dst) | |
252 | { | |
253 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
254 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
255 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
256 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
257 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
258 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
259 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
260 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
261 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
262 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
263 | /* we haven't done any processing on it yet, so... */ |
264 | dst->rawdata = (void *) 0; | |
265 | } | |
266 | ||
267 | /* Translate an ELF section header table entry in internal format into an | |
268 | ELF section header table entry in external format. */ | |
269 | ||
270 | static void | |
271 | DEFUN (elf_swap_shdr_out, (abfd, src, dst), | |
272 | bfd * abfd AND | |
273 | Elf_Internal_Shdr * src AND | |
274 | Elf_External_Shdr * dst) | |
275 | { | |
276 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
277 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
278 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
279 | put_word (abfd, src->sh_flags, dst->sh_flags); |
280 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
281 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
282 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
283 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
284 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
285 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
286 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
287 | } |
288 | ||
289 | ||
290 | /* Translate an ELF program header table entry in external format into an | |
291 | ELF program header table entry in internal format. */ | |
292 | ||
293 | static void | |
294 | DEFUN (elf_swap_phdr_in, (abfd, src, dst), | |
295 | bfd * abfd AND | |
296 | Elf_External_Phdr * src AND | |
297 | Elf_Internal_Phdr * dst) | |
298 | { | |
299 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 300 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
301 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
302 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
303 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
304 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
305 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
306 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
307 | } |
308 | ||
244ffee7 JK |
309 | static void |
310 | DEFUN (elf_swap_phdr_out, (abfd, src, dst), | |
311 | bfd * abfd AND | |
312 | Elf_Internal_Phdr * src AND | |
313 | Elf_External_Phdr * dst) | |
314 | { | |
315 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
316 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
317 | put_word (abfd, src->p_offset, dst->p_offset); |
318 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
319 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
320 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
321 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 322 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 323 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
324 | } |
325 | ||
326 | /* Translate an ELF reloc from external format to internal format. */ | |
32090b8e | 327 | static INLINE void |
244ffee7 JK |
328 | DEFUN (elf_swap_reloc_in, (abfd, src, dst), |
329 | bfd * abfd AND | |
330 | Elf_External_Rel * src AND | |
331 | Elf_Internal_Rel * dst) | |
332 | { | |
94dbb655 KR |
333 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
334 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
335 | } |
336 | ||
32090b8e | 337 | static INLINE void |
244ffee7 JK |
338 | DEFUN (elf_swap_reloca_in, (abfd, src, dst), |
339 | bfd * abfd AND | |
340 | Elf_External_Rela * src AND | |
341 | Elf_Internal_Rela * dst) | |
342 | { | |
94dbb655 KR |
343 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
344 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
345 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
346 | } |
347 | ||
348 | /* Translate an ELF reloc from internal format to external format. */ | |
32090b8e | 349 | static INLINE void |
244ffee7 JK |
350 | DEFUN (elf_swap_reloc_out, (abfd, src, dst), |
351 | bfd * abfd AND | |
352 | Elf_Internal_Rel * src AND | |
353 | Elf_External_Rel * dst) | |
354 | { | |
94dbb655 KR |
355 | put_word (abfd, src->r_offset, dst->r_offset); |
356 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
357 | } |
358 | ||
32090b8e | 359 | static INLINE void |
244ffee7 JK |
360 | DEFUN (elf_swap_reloca_out, (abfd, src, dst), |
361 | bfd * abfd AND | |
362 | Elf_Internal_Rela * src AND | |
363 | Elf_External_Rela * dst) | |
364 | { | |
94dbb655 KR |
365 | put_word (abfd, src->r_offset, dst->r_offset); |
366 | put_word (abfd, src->r_info, dst->r_info); | |
367 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 JK |
368 | } |
369 | ||
32090b8e KR |
370 | \f |
371 | ||
372 | /* String table creation/manipulation routines */ | |
373 | ||
374 | static struct strtab * | |
375 | DEFUN (bfd_new_strtab, (abfd), | |
376 | bfd * abfd) | |
377 | { | |
378 | struct strtab *ss; | |
379 | ||
380 | ss = (struct strtab *) bfd_xmalloc (sizeof (struct strtab)); | |
381 | ss->tab = bfd_xmalloc (1); | |
382 | BFD_ASSERT (ss->tab != 0); | |
383 | *ss->tab = 0; | |
384 | ss->nentries = 0; | |
385 | ss->length = 1; | |
244ffee7 | 386 | |
32090b8e KR |
387 | return ss; |
388 | } | |
389 | ||
390 | static int | |
391 | DEFUN (bfd_add_to_strtab, (abfd, ss, str), | |
392 | bfd * abfd AND | |
393 | struct strtab *ss AND | |
394 | CONST char *str) | |
395 | { | |
396 | /* should search first, but for now: */ | |
397 | /* include the trailing NUL */ | |
398 | int ln = strlen (str) + 1; | |
399 | ||
400 | /* should this be using obstacks? */ | |
401 | ss->tab = realloc (ss->tab, ss->length + ln); | |
402 | ||
403 | BFD_ASSERT (ss->tab != 0); | |
404 | strcpy (ss->tab + ss->length, str); | |
405 | ss->nentries++; | |
406 | ss->length += ln; | |
407 | ||
408 | return ss->length - ln; | |
409 | } | |
410 | ||
411 | static int | |
412 | DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2), | |
413 | bfd * abfd AND | |
414 | struct strtab *ss AND | |
415 | char *str AND | |
416 | CONST char *str2) | |
244ffee7 | 417 | { |
32090b8e KR |
418 | /* should search first, but for now: */ |
419 | /* include the trailing NUL */ | |
420 | int ln = strlen (str) + strlen (str2) + 1; | |
421 | ||
422 | /* should this be using obstacks? */ | |
423 | if (ss->length) | |
424 | ss->tab = realloc (ss->tab, ss->length + ln); | |
425 | else | |
426 | ss->tab = bfd_xmalloc (ln); | |
427 | ||
428 | BFD_ASSERT (ss->tab != 0); | |
429 | strcpy (ss->tab + ss->length, str); | |
430 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
431 | ss->nentries++; | |
432 | ss->length += ln; | |
433 | ||
434 | return ss->length - ln; | |
244ffee7 JK |
435 | } |
436 | ||
32090b8e KR |
437 | \f |
438 | /* ELF .o/exec file reading */ | |
439 | ||
440 | /* Create a new bfd section from an ELF section header. */ | |
441 | ||
244ffee7 JK |
442 | static boolean |
443 | DEFUN (bfd_section_from_shdr, (abfd, shindex), | |
444 | bfd * abfd AND | |
445 | unsigned int shindex) | |
446 | { | |
32090b8e KR |
447 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
448 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
449 | asection *newsect; |
450 | char *name; | |
451 | ||
452 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
453 | ||
454 | switch (hdr->sh_type) | |
455 | { | |
456 | ||
457 | case SHT_NULL: | |
458 | /* inactive section. Throw it away. */ | |
459 | return true; | |
460 | ||
461 | case SHT_PROGBITS: | |
462 | /* Bits that get saved. This one is real. */ | |
463 | if (!hdr->rawdata) | |
464 | { | |
465 | newsect = bfd_make_section (abfd, name); | |
466 | if (newsect != NULL) | |
467 | { | |
32090b8e KR |
468 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
469 | newsect->flags |= SEC_HAS_CONTENTS; | |
244ffee7 JK |
470 | newsect->vma = hdr->sh_addr; |
471 | newsect->_raw_size = hdr->sh_size; | |
6a3eb9b6 | 472 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
473 | |
474 | if (hdr->sh_flags & SHF_ALLOC) | |
475 | { | |
476 | newsect->flags |= SEC_ALLOC; | |
477 | newsect->flags |= SEC_LOAD; | |
478 | } | |
479 | ||
480 | if (!(hdr->sh_flags & SHF_WRITE)) | |
481 | newsect->flags |= SEC_READONLY; | |
482 | ||
483 | if (hdr->sh_flags & SHF_EXECINSTR) | |
32090b8e | 484 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
36d541b1 | 485 | else if (newsect->flags & SEC_ALLOC) |
244ffee7 JK |
486 | newsect->flags |= SEC_DATA; |
487 | ||
d6e5f950 ILT |
488 | /* The debugging sections appear to recognized only by |
489 | name. */ | |
490 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
491 | || strncmp (name, ".line", sizeof ".line" - 1) == 0 | |
492 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
493 | newsect->flags |= SEC_DEBUGGING; | |
494 | ||
244ffee7 JK |
495 | hdr->rawdata = (void *) newsect; |
496 | } | |
94dbb655 KR |
497 | else |
498 | hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name); | |
244ffee7 JK |
499 | } |
500 | return true; | |
501 | ||
502 | case SHT_NOBITS: | |
503 | /* Bits that get saved. This one is real. */ | |
504 | if (!hdr->rawdata) | |
505 | { | |
506 | newsect = bfd_make_section (abfd, name); | |
507 | if (newsect != NULL) | |
508 | { | |
509 | newsect->vma = hdr->sh_addr; | |
510 | newsect->_raw_size = hdr->sh_size; | |
511 | newsect->filepos = hdr->sh_offset; /* fake */ | |
6a3eb9b6 | 512 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
513 | if (hdr->sh_flags & SHF_ALLOC) |
514 | newsect->flags |= SEC_ALLOC; | |
515 | ||
516 | if (!(hdr->sh_flags & SHF_WRITE)) | |
517 | newsect->flags |= SEC_READONLY; | |
518 | ||
36d541b1 ILT |
519 | /* FIXME: This section is empty. Does it really make |
520 | sense to set SEC_CODE for it? */ | |
244ffee7 JK |
521 | if (hdr->sh_flags & SHF_EXECINSTR) |
522 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
244ffee7 JK |
523 | |
524 | hdr->rawdata = (void *) newsect; | |
525 | } | |
526 | } | |
527 | return true; | |
528 | ||
529 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
530 | if (elf_onesymtab (abfd) == shindex) |
531 | return true; | |
532 | ||
244ffee7 | 533 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 534 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 535 | elf_onesymtab (abfd) = shindex; |
32090b8e KR |
536 | elf_tdata(abfd)->symtab_hdr = *hdr; |
537 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
244ffee7 JK |
538 | abfd->flags |= HAS_SYMS; |
539 | return true; | |
540 | ||
541 | case SHT_STRTAB: /* A string table */ | |
32090b8e | 542 | if (hdr->rawdata) |
fce36137 | 543 | return true; |
32090b8e KR |
544 | if (ehdr->e_shstrndx == shindex) |
545 | { | |
546 | elf_tdata(abfd)->shstrtab_hdr = *hdr; | |
547 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr; | |
548 | hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr; | |
549 | return true; | |
550 | } | |
551 | { | |
552 | int i; | |
fce36137 | 553 | |
32090b8e KR |
554 | for (i = 1; i < ehdr->e_shnum; i++) |
555 | { | |
556 | Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i]; | |
557 | if (hdr2->sh_link == shindex) | |
558 | { | |
559 | bfd_section_from_shdr (abfd, i); | |
560 | if (elf_onesymtab (abfd) == i) | |
561 | { | |
562 | elf_tdata(abfd)->strtab_hdr = *hdr; | |
563 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
564 | return true; | |
565 | } | |
566 | #if 0 /* Not handling other string tables specially right now. */ | |
567 | hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */ | |
568 | /* We have a strtab for some random other section. */ | |
569 | newsect = (asection *) hdr2->rawdata; | |
570 | if (!newsect) | |
571 | break; | |
572 | hdr->rawdata = (PTR) newsect; | |
573 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
574 | *hdr2 = *hdr; | |
575 | elf_elfsections(abfd)[shindex] = hdr2; | |
576 | #endif | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | newsect = bfd_make_section (abfd, name); | |
582 | if (newsect) | |
fce36137 | 583 | { |
32090b8e KR |
584 | newsect->flags = SEC_HAS_CONTENTS; |
585 | hdr->rawdata = (PTR) newsect; | |
586 | newsect->_raw_size = hdr->sh_size; | |
587 | newsect->alignment_power = 0; | |
588 | newsect->vma = 0; | |
589 | ||
590 | if (hdr->sh_flags & SHF_ALLOC) | |
591 | newsect->flags |= SEC_ALLOC|SEC_LOAD; | |
592 | if (!(hdr->sh_flags & SHF_WRITE)) | |
593 | newsect->flags |= SEC_READONLY; | |
594 | if (hdr->sh_flags & SHF_EXECINSTR) | |
595 | newsect->flags |= SEC_CODE; | |
36d541b1 | 596 | else if (newsect->flags & SEC_ALLOC) |
32090b8e | 597 | newsect->flags |= SEC_DATA; |
fce36137 KR |
598 | } |
599 | ||
244ffee7 JK |
600 | return true; |
601 | ||
602 | case SHT_REL: | |
603 | case SHT_RELA: | |
32090b8e KR |
604 | /* *These* do a lot of work -- but build no sections! |
605 | The spec says there can be multiple strtabs, but only one symtab, | |
606 | but there can be lots of REL* sections. */ | |
244ffee7 | 607 | /* FIXME: The above statement is wrong! There are typically at least |
32090b8e KR |
608 | two symbol tables in a dynamically linked executable, ".dynsym" |
609 | which is the dynamic linkage symbol table and ".symtab", which is | |
610 | the "traditional" symbol table. -fnf */ | |
244ffee7 JK |
611 | |
612 | { | |
613 | asection *target_sect; | |
32090b8e | 614 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
615 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
616 | ||
617 | /* Don't allow REL relocations on a machine that uses RELA and | |
618 | vice versa. */ | |
619 | /* @@ Actually, the generic ABI does suggest that both might be | |
620 | used in one file. But the four ABI Processor Supplements I | |
621 | have access to right now all specify that only one is used on | |
622 | each of those architectures. It's conceivable that, e.g., a | |
623 | bunch of absolute 32-bit relocs might be more compact in REL | |
624 | form even on a RELA machine... */ | |
625 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); | |
626 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); | |
627 | BFD_ASSERT (hdr->sh_entsize == | |
628 | (use_rela_p | |
6a3eb9b6 KR |
629 | ? sizeof (Elf_External_Rela) |
630 | : sizeof (Elf_External_Rel))); | |
244ffee7 | 631 | |
244ffee7 | 632 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
32090b8e | 633 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
244ffee7 JK |
634 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
635 | if (target_sect == NULL) | |
636 | return false; | |
637 | ||
32090b8e KR |
638 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
639 | *hdr2 = *hdr; | |
640 | elf_elfsections(abfd)[shindex] = hdr2; | |
244ffee7 JK |
641 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
642 | target_sect->flags |= SEC_RELOC; | |
643 | target_sect->relocation = 0; | |
644 | target_sect->rel_filepos = hdr->sh_offset; | |
32090b8e | 645 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
646 | return true; |
647 | } | |
648 | break; | |
649 | ||
650 | case SHT_HASH: | |
651 | case SHT_DYNAMIC: | |
652 | case SHT_DYNSYM: /* could treat this like symtab... */ | |
653 | #if 0 | |
654 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); | |
655 | BFD_FAIL (); | |
656 | #endif | |
657 | break; | |
658 | ||
659 | case SHT_NOTE: | |
660 | #if 0 | |
661 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
662 | BFD_FAIL (); | |
663 | #endif | |
664 | break; | |
665 | ||
666 | case SHT_SHLIB: | |
667 | #if 0 | |
668 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
669 | #endif | |
670 | return true; | |
671 | ||
672 | default: | |
e621c5cc ILT |
673 | /* Check for any processor-specific section types. */ |
674 | { | |
675 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
676 | ||
677 | if (bed->elf_backend_section_from_shdr) | |
678 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
679 | } | |
244ffee7 JK |
680 | break; |
681 | } | |
682 | ||
683 | return true; | |
684 | } | |
685 | ||
fce36137 KR |
686 | boolean |
687 | DEFUN (elf_new_section_hook, (abfd, sec), | |
688 | bfd *abfd | |
689 | AND asection *sec) | |
690 | { | |
32090b8e | 691 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
692 | |
693 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
694 | sec->used_by_bfd = (PTR) sdata; | |
32090b8e | 695 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
696 | return true; |
697 | } | |
698 | ||
699 | /* Create a new bfd section from an ELF program header. | |
700 | ||
701 | Since program segments have no names, we generate a synthetic name | |
702 | of the form segment<NUM>, where NUM is generally the index in the | |
703 | program header table. For segments that are split (see below) we | |
704 | generate the names segment<NUM>a and segment<NUM>b. | |
705 | ||
706 | Note that some program segments may have a file size that is different than | |
707 | (less than) the memory size. All this means is that at execution the | |
708 | system must allocate the amount of memory specified by the memory size, | |
709 | but only initialize it with the first "file size" bytes read from the | |
710 | file. This would occur for example, with program segments consisting | |
711 | of combined data+bss. | |
712 | ||
713 | To handle the above situation, this routine generates TWO bfd sections | |
714 | for the single program segment. The first has the length specified by | |
715 | the file size of the segment, and the second has the length specified | |
716 | by the difference between the two sizes. In effect, the segment is split | |
717 | into it's initialized and uninitialized parts. | |
718 | ||
719 | */ | |
720 | ||
721 | static boolean | |
722 | DEFUN (bfd_section_from_phdr, (abfd, hdr, index), | |
723 | bfd * abfd AND | |
724 | Elf_Internal_Phdr * hdr AND | |
725 | int index) | |
726 | { | |
727 | asection *newsect; | |
728 | char *name; | |
729 | char namebuf[64]; | |
730 | int split; | |
731 | ||
732 | split = ((hdr->p_memsz > 0) && | |
733 | (hdr->p_filesz > 0) && | |
734 | (hdr->p_memsz > hdr->p_filesz)); | |
735 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
736 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
737 | strcpy (name, namebuf); | |
738 | newsect = bfd_make_section (abfd, name); | |
739 | newsect->vma = hdr->p_vaddr; | |
740 | newsect->_raw_size = hdr->p_filesz; | |
741 | newsect->filepos = hdr->p_offset; | |
742 | newsect->flags |= SEC_HAS_CONTENTS; | |
743 | if (hdr->p_type == PT_LOAD) | |
744 | { | |
745 | newsect->flags |= SEC_ALLOC; | |
746 | newsect->flags |= SEC_LOAD; | |
747 | if (hdr->p_flags & PF_X) | |
748 | { | |
749 | /* FIXME: all we known is that it has execute PERMISSION, | |
750 | may be data. */ | |
751 | newsect->flags |= SEC_CODE; | |
752 | } | |
753 | } | |
754 | if (!(hdr->p_flags & PF_W)) | |
755 | { | |
756 | newsect->flags |= SEC_READONLY; | |
757 | } | |
758 | ||
759 | if (split) | |
760 | { | |
761 | sprintf (namebuf, "segment%db", index); | |
762 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
763 | strcpy (name, namebuf); | |
764 | newsect = bfd_make_section (abfd, name); | |
765 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
766 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
767 | if (hdr->p_type == PT_LOAD) | |
768 | { | |
769 | newsect->flags |= SEC_ALLOC; | |
770 | if (hdr->p_flags & PF_X) | |
771 | newsect->flags |= SEC_CODE; | |
772 | } | |
773 | if (!(hdr->p_flags & PF_W)) | |
774 | newsect->flags |= SEC_READONLY; | |
775 | } | |
776 | ||
777 | return true; | |
778 | } | |
779 | ||
32090b8e | 780 | /* Begin processing a given object. |
244ffee7 | 781 | |
32090b8e KR |
782 | First we validate the file by reading in the ELF header and checking |
783 | the magic number. */ | |
784 | ||
785 | static INLINE boolean | |
786 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp) | |
244ffee7 | 787 | { |
32090b8e KR |
788 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
789 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
790 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
791 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
792 | } | |
244ffee7 | 793 | |
d24928c0 KR |
794 | /* Check to see if the file associated with ABFD matches the target vector |
795 | that ABFD points to. | |
796 | ||
797 | Note that we may be called several times with the same ABFD, but different | |
798 | target vectors, most of which will not match. We have to avoid leaving | |
799 | any side effects in ABFD, or any data it points to (like tdata), if the | |
800 | file does not match the target vector. | |
801 | ||
802 | FIXME: There is memory leak if we are called more than once with the same | |
803 | ABFD, and that bfd already has tdata allocated, since we allocate more tdata | |
804 | and the old tdata is orphaned. Since it's in the bfd obstack, there isn't | |
805 | much we can do about this except possibly rewrite the code. There are | |
806 | also other bfd_allocs that may be the source of memory leaks as well. */ | |
807 | ||
32090b8e KR |
808 | bfd_target * |
809 | DEFUN (elf_object_p, (abfd), bfd * abfd) | |
244ffee7 | 810 | { |
32090b8e KR |
811 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
812 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
813 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
814 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
815 | int shindex; | |
816 | char *shstrtab; /* Internal copy of section header stringtab */ | |
817 | struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */ | |
d24928c0 | 818 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
244ffee7 | 819 | |
32090b8e KR |
820 | /* Read in the ELF header in external format. */ |
821 | ||
822 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
d24928c0 | 823 | goto got_system_call_error; |
244ffee7 | 824 | |
32090b8e KR |
825 | /* Now check to see if we have a valid ELF file, and one that BFD can |
826 | make use of. The magic number must match, the address size ('class') | |
827 | and byte-swapping must match our XVEC entry, and it must have a | |
828 | section header table (FIXME: See comments re sections at top of this | |
829 | file). */ | |
244ffee7 | 830 | |
d24928c0 KR |
831 | if ((elf_file_p (&x_ehdr) == false) || |
832 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
833 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
834 | goto got_wrong_format_error; | |
244ffee7 | 835 | |
d24928c0 | 836 | /* Check that file's byte order matches xvec's */ |
32090b8e | 837 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 838 | { |
32090b8e KR |
839 | case ELFDATA2MSB: /* Big-endian */ |
840 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 841 | goto got_wrong_format_error; |
32090b8e KR |
842 | break; |
843 | case ELFDATA2LSB: /* Little-endian */ | |
844 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 845 | goto got_wrong_format_error; |
32090b8e KR |
846 | break; |
847 | case ELFDATANONE: /* No data encoding specified */ | |
848 | default: /* Unknown data encoding specified */ | |
d24928c0 | 849 | goto got_wrong_format_error; |
244ffee7 | 850 | } |
244ffee7 | 851 | |
32090b8e | 852 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
d24928c0 | 853 | the tdata pointer in the bfd. FIXME: memory leak, see above. */ |
244ffee7 | 854 | |
d24928c0 KR |
855 | elf_tdata (abfd) = |
856 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
857 | if (elf_tdata (abfd) == NULL) | |
858 | goto got_no_memory_error; | |
244ffee7 | 859 | |
32090b8e KR |
860 | /* Now that we know the byte order, swap in the rest of the header */ |
861 | i_ehdrp = elf_elfheader (abfd); | |
862 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
863 | #if DEBUG & 1 | |
864 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
865 | #endif |
866 | ||
32090b8e KR |
867 | /* If there is no section header table, we're hosed. */ |
868 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 869 | goto got_wrong_format_error; |
244ffee7 | 870 | |
32090b8e KR |
871 | if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN) |
872 | abfd->flags |= EXEC_P; | |
244ffee7 | 873 | |
32090b8e KR |
874 | /* Retrieve the architecture information from the xvec and verify |
875 | that it matches the machine info stored in the ELF header. | |
876 | This allows us to resolve ambiguous formats that might not | |
877 | otherwise be distinguishable. */ | |
244ffee7 | 878 | |
32090b8e | 879 | ebd = get_elf_backend_data (abfd); |
244ffee7 | 880 | |
32090b8e KR |
881 | /* Perhaps the elf architecture value should be another field in the |
882 | elf backend data? If you change this to work that way, make sure | |
883 | that you still get bfd_arch_unknown for unknown architecture types, | |
884 | and that it still gets accepted by the `generic' elf target. */ | |
885 | { | |
886 | int i; | |
887 | enum bfd_architecture arch = bfd_arch_unknown; | |
888 | ||
889 | for (i = 0; i < bfd_elf_arch_map_size; i++) | |
890 | { | |
891 | if (bfd_elf_arch_map[i].elf_arch == i_ehdrp->e_machine) | |
892 | { | |
893 | arch = bfd_elf_arch_map[i].bfd_arch; | |
894 | break; | |
895 | } | |
896 | } | |
897 | /* start-sanitize-v9 */ | |
898 | if (i_ehdrp->e_machine == EM_SPARC64) | |
899 | arch = bfd_arch_sparc; | |
900 | /* end-sanitize-v9 */ | |
901 | if (ebd->arch != arch) | |
d24928c0 | 902 | goto got_wrong_format_error; |
32090b8e KR |
903 | bfd_default_set_arch_mach (abfd, arch, 0); |
904 | } | |
905 | ||
906 | /* Allocate space for a copy of the section header table in | |
907 | internal form, seek to the section header table in the file, | |
908 | read it in, and convert it to internal form. As a simple sanity | |
909 | check, verify that the what BFD thinks is the size of each section | |
910 | header table entry actually matches the size recorded in the file. */ | |
911 | ||
912 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
d24928c0 | 913 | goto got_wrong_format_error; |
32090b8e KR |
914 | i_shdrp = (Elf_Internal_Shdr *) |
915 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); | |
300adb31 KR |
916 | elf_elfsections (abfd) = |
917 | (Elf_Internal_Shdr **) bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum); | |
32090b8e | 918 | if (!i_shdrp || !elf_elfsections(abfd)) |
d24928c0 | 919 | goto got_no_memory_error; |
32090b8e | 920 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
d24928c0 | 921 | goto got_system_call_error; |
32090b8e | 922 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 923 | { |
d24928c0 KR |
924 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
925 | goto got_system_call_error; | |
32090b8e KR |
926 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
927 | elf_elfsections(abfd)[shindex] = i_shdrp + shindex; | |
244ffee7 | 928 | } |
32090b8e | 929 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 930 | { |
32090b8e | 931 | bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx); |
244ffee7 JK |
932 | } |
933 | ||
32090b8e KR |
934 | #if 0 |
935 | for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--) | |
936 | { | |
937 | if (!strcmp (elf_string_from_elf_strtab (abfd, | |
938 | i_shdrp[shindex].sh_name), | |
939 | ".strtab")) | |
940 | { | |
941 | elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex]; | |
942 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
943 | } | |
944 | else if (!strcmp (elf_string_from_elf_strtab (abfd, | |
945 | i_shdrp[shindex].sh_name), | |
946 | ".symtab")) | |
947 | { | |
948 | elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex]; | |
949 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
950 | elf_onesymtab (abfd) = shindex; | |
951 | } | |
952 | } | |
953 | #endif | |
244ffee7 | 954 | |
32090b8e KR |
955 | /* Read in the string table containing the names of the sections. We |
956 | will need the base pointer to this table later. */ | |
957 | /* We read this inline now, so that we don't have to go through | |
958 | bfd_section_from_shdr with it (since this particular strtab is | |
959 | used to find all of the ELF section names.) */ | |
244ffee7 | 960 | |
32090b8e KR |
961 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
962 | if (!shstrtab) | |
d24928c0 | 963 | goto got_wrong_format_error; |
244ffee7 | 964 | |
32090b8e KR |
965 | /* Once all of the section headers have been read and converted, we |
966 | can start processing them. Note that the first section header is | |
967 | a dummy placeholder entry, so we ignore it. | |
244ffee7 | 968 | |
32090b8e KR |
969 | We also watch for the symbol table section and remember the file |
970 | offset and section size for both the symbol table section and the | |
971 | associated string table section. */ | |
244ffee7 | 972 | |
32090b8e KR |
973 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
974 | { | |
975 | bfd_section_from_shdr (abfd, shindex); | |
976 | } | |
244ffee7 | 977 | |
32090b8e | 978 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 979 | |
32090b8e | 980 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 981 | |
d24928c0 KR |
982 | return (abfd->xvec); |
983 | ||
984 | /* If we are going to use goto's to avoid duplicating error setting | |
985 | and return(NULL) code, then this at least makes it more maintainable. */ | |
986 | ||
987 | got_system_call_error: | |
988 | bfd_error = system_call_error; | |
989 | goto got_no_match; | |
990 | got_wrong_format_error: | |
991 | bfd_error = wrong_format; | |
992 | goto got_no_match; | |
993 | got_no_memory_error: | |
994 | bfd_error = no_memory; | |
995 | goto got_no_match; | |
996 | got_no_match: | |
997 | elf_tdata (abfd) = preserved_tdata; | |
998 | return (NULL); | |
32090b8e | 999 | } |
244ffee7 | 1000 | |
32090b8e KR |
1001 | \f |
1002 | /* ELF .o/exec file writing */ | |
1003 | ||
d24928c0 KR |
1004 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1005 | of the symbol if there is one. */ | |
32090b8e KR |
1006 | static INLINE elf_symbol_type * |
1007 | DEFUN (elf_symbol_from, (ignore_abfd, symbol), | |
1008 | bfd * ignore_abfd AND | |
1009 | asymbol * symbol) | |
244ffee7 | 1010 | { |
32090b8e KR |
1011 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1012 | return 0; | |
1013 | ||
1014 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1015 | return 0; | |
1016 | ||
1017 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1018 | } |
1019 | ||
d24928c0 | 1020 | /* Create ELF output from BFD sections. |
244ffee7 | 1021 | |
d24928c0 KR |
1022 | Essentially, just create the section header and forget about the program |
1023 | header for now. */ | |
244ffee7 | 1024 | |
32090b8e KR |
1025 | static void |
1026 | DEFUN (elf_make_sections, (abfd, asect, obj), | |
1027 | bfd * abfd AND | |
1028 | asection * asect AND | |
1029 | PTR obj) | |
1030 | { | |
1031 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1032 | /* and all of these sections generate at *least* one ELF section. */ | |
1033 | int idx; | |
244ffee7 | 1034 | |
32090b8e KR |
1035 | Elf_Internal_Shdr *this_hdr; |
1036 | this_hdr = &elf_section_data (asect)->this_hdr; | |
244ffee7 | 1037 | |
32090b8e KR |
1038 | this_hdr->sh_addr = asect->vma; |
1039 | this_hdr->sh_size = asect->_raw_size; | |
1040 | /* contents already set by elf_set_section_contents */ | |
244ffee7 | 1041 | |
300adb31 | 1042 | if (asect->flags & SEC_RELOC) |
244ffee7 | 1043 | { |
32090b8e KR |
1044 | /* emit a reloc section, and thus strtab and symtab... */ |
1045 | Elf_Internal_Shdr *rela_hdr; | |
1046 | Elf_External_Rela *outbound_relocas; | |
1047 | Elf_External_Rel *outbound_relocs; | |
1048 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1049 | |
32090b8e | 1050 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
244ffee7 | 1051 | |
32090b8e KR |
1052 | /* orelocation has the data, reloc_count has the count... */ |
1053 | if (use_rela_p) | |
1054 | { | |
1055 | rela_hdr->sh_type = SHT_RELA; | |
1056 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1057 | } | |
1058 | else | |
1059 | /* REL relocations */ | |
1060 | { | |
1061 | rela_hdr->sh_type = SHT_REL; | |
1062 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1063 | } | |
1064 | rela_hdr->sh_flags = 0; | |
1065 | rela_hdr->sh_addr = 0; | |
1066 | rela_hdr->sh_offset = 0; | |
1067 | rela_hdr->sh_addralign = 0; | |
1068 | rela_hdr->size = 0; | |
1069 | } | |
1070 | if (asect->flags & SEC_ALLOC) | |
244ffee7 | 1071 | { |
32090b8e KR |
1072 | this_hdr->sh_flags |= SHF_ALLOC; |
1073 | if (asect->flags & SEC_LOAD) | |
1074 | { | |
1075 | /* @@ Do something with sh_type? */ | |
1076 | } | |
244ffee7 | 1077 | } |
32090b8e KR |
1078 | if (!(asect->flags & SEC_READONLY)) |
1079 | this_hdr->sh_flags |= SHF_WRITE; | |
244ffee7 | 1080 | |
32090b8e KR |
1081 | if (asect->flags & SEC_CODE) |
1082 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1083 | } | |
244ffee7 | 1084 | |
32090b8e KR |
1085 | void |
1086 | write_relocs (abfd, sec, xxx) | |
1087 | bfd *abfd; | |
1088 | asection *sec; | |
1089 | PTR xxx; | |
1090 | { | |
1091 | Elf_Internal_Shdr *rela_hdr; | |
1092 | Elf_External_Rela *outbound_relocas; | |
1093 | Elf_External_Rel *outbound_relocs; | |
1094 | int idx; | |
1095 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 KR |
1096 | asymbol *last_sym = 0; |
1097 | int last_sym_idx; | |
244ffee7 | 1098 | |
32090b8e KR |
1099 | if ((sec->flags & SEC_RELOC) == 0) |
1100 | return; | |
1101 | /* Flags are sometimes inconsistent. */ | |
1102 | if (sec->reloc_count == 0) | |
1103 | return; | |
244ffee7 | 1104 | |
32090b8e | 1105 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1106 | |
32090b8e KR |
1107 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1108 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
244ffee7 | 1109 | |
32090b8e | 1110 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1111 | if (use_rela_p) |
1112 | { | |
1113 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1114 | ||
1115 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1116 | { |
300adb31 KR |
1117 | Elf_Internal_Rela dst_rela; |
1118 | Elf_External_Rela *src_rela; | |
1119 | arelent *ptr; | |
1120 | asymbol *sym; | |
1121 | int n; | |
1122 | ||
1123 | ptr = sec->orelocation[idx]; | |
1124 | src_rela = outbound_relocas + idx; | |
1125 | if (!(abfd->flags & EXEC_P)) | |
1126 | dst_rela.r_offset = ptr->address - sec->vma; | |
1127 | else | |
1128 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1129 | |
300adb31 KR |
1130 | sym = *ptr->sym_ptr_ptr; |
1131 | if (sym == last_sym) | |
1132 | n = last_sym_idx; | |
1133 | else | |
32090b8e | 1134 | { |
300adb31 KR |
1135 | last_sym = sym; |
1136 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1137 | } |
300adb31 KR |
1138 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1139 | ||
1140 | dst_rela.r_addend = ptr->addend; | |
1141 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1142 | } |
300adb31 KR |
1143 | } |
1144 | else | |
1145 | /* REL relocations */ | |
1146 | { | |
1147 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1148 | ||
1149 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1150 | { |
300adb31 KR |
1151 | Elf_Internal_Rel dst_rel; |
1152 | Elf_External_Rel *src_rel; | |
1153 | arelent *ptr; | |
1154 | int n; | |
1155 | asymbol *sym; | |
1156 | ||
1157 | ptr = sec->orelocation[idx]; | |
1158 | sym = *ptr->sym_ptr_ptr; | |
1159 | src_rel = outbound_relocs + idx; | |
1160 | if (!(abfd->flags & EXEC_P)) | |
1161 | dst_rel.r_offset = ptr->address - sec->vma; | |
1162 | else | |
1163 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1164 | |
300adb31 KR |
1165 | if (sym == last_sym) |
1166 | n = last_sym_idx; | |
1167 | else | |
32090b8e | 1168 | { |
300adb31 KR |
1169 | last_sym = sym; |
1170 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1171 | } |
300adb31 KR |
1172 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1173 | ||
1174 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1175 | } |
300adb31 | 1176 | } |
32090b8e | 1177 | } |
244ffee7 | 1178 | |
32090b8e KR |
1179 | static void |
1180 | fix_up_strtabs (abfd, asect, obj) | |
1181 | bfd *abfd; | |
1182 | asection *asect; | |
1183 | PTR obj; | |
1184 | { | |
1185 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; | |
1186 | int this_idx = elf_section_data(asect)->this_idx; | |
244ffee7 | 1187 | |
32090b8e KR |
1188 | /* @@ Check flags! */ |
1189 | if (!strncmp (asect->name, ".stab", 5) | |
1190 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
1191 | { | |
1192 | size_t len = strlen (asect->name) + 1; | |
e74034d8 | 1193 | char *s = (char *) alloca (len); |
32090b8e KR |
1194 | strcpy (s, asect->name); |
1195 | s[len - 4] = 0; | |
1196 | asect = bfd_get_section_by_name (abfd, s); | |
1197 | if (!asect) | |
1198 | abort (); | |
1199 | elf_section_data(asect)->this_hdr.sh_link = this_idx; | |
244ffee7 | 1200 | |
32090b8e KR |
1201 | /* @@ Assuming 32 bits! */ |
1202 | this_hdr->sh_entsize = 0xc; | |
244ffee7 | 1203 | } |
32090b8e | 1204 | } |
244ffee7 | 1205 | |
32090b8e KR |
1206 | static void |
1207 | DEFUN (elf_fake_sections, (abfd, asect, obj), | |
1208 | bfd * abfd AND | |
1209 | asection * asect AND | |
1210 | PTR obj) | |
1211 | { | |
1212 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1213 | /* and all of these sections generate at *least* one ELF section. */ | |
244ffee7 | 1214 | |
32090b8e KR |
1215 | Elf_Internal_Shdr *this_hdr; |
1216 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1217 | this_hdr->sh_name = | |
1218 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); | |
1219 | /* We need to log the type *now* so that elf_section_from_bfd_section | |
1220 | can find us... have to set rawdata too. */ | |
1221 | this_hdr->rawdata = (void *) asect; | |
1222 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
1223 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) | |
1224 | this_hdr->sh_type = SHT_PROGBITS; | |
e621c5cc ILT |
1225 | else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0)) |
1226 | { | |
1227 | BFD_ASSERT (!strcmp (asect->name, ".bss")); | |
1228 | this_hdr->sh_type = SHT_NOBITS; | |
1229 | } | |
1230 | /* FIXME I am not sure how to detect a .note section from the flags | |
1231 | word of an `asection'. */ | |
1232 | else if (!strcmp (asect->name, ".note")) | |
1233 | this_hdr->sh_type = SHT_NOTE; | |
32090b8e | 1234 | else |
32090b8e KR |
1235 | this_hdr->sh_type = SHT_PROGBITS; |
1236 | ||
e621c5cc ILT |
1237 | /* Now, check for processor-specific section types. */ |
1238 | { | |
1239 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1240 | ||
1241 | if (bed->elf_backend_fake_sections) | |
1242 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1243 | } | |
1244 | ||
32090b8e KR |
1245 | this_hdr->sh_flags = 0; |
1246 | this_hdr->sh_addr = 0; | |
1247 | this_hdr->sh_size = 0; | |
1248 | this_hdr->sh_entsize = 0; | |
1249 | this_hdr->sh_info = 0; | |
1250 | this_hdr->sh_link = 0; | |
1251 | this_hdr->sh_offset = 0; | |
1252 | this_hdr->size = 0; | |
244ffee7 | 1253 | |
32090b8e KR |
1254 | { |
1255 | /* Emit a strtab and symtab, and possibly a reloc section. */ | |
1256 | Elf_Internal_Shdr *rela_hdr; | |
1257 | Elf_Internal_Shdr *symstrtab_hdr; | |
244ffee7 | 1258 | |
32090b8e KR |
1259 | /* Note that only one symtab is used, so just remember it |
1260 | for now. */ | |
244ffee7 | 1261 | |
300adb31 | 1262 | if (asect->flags & SEC_RELOC) |
32090b8e KR |
1263 | { |
1264 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1265 | |
32090b8e KR |
1266 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1267 | rela_hdr->sh_name = | |
1268 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1269 | use_rela_p ? ".rela" : ".rel", | |
1270 | asect->name); | |
1271 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1272 | rela_hdr->sh_entsize = (use_rela_p | |
1273 | ? sizeof (Elf_External_Rela) | |
1274 | : sizeof (Elf_External_Rel)); | |
1275 | ||
1276 | rela_hdr->sh_flags = 0; | |
1277 | rela_hdr->sh_addr = 0; | |
1278 | rela_hdr->sh_size = 0; | |
1279 | rela_hdr->sh_offset = 0; | |
1280 | rela_hdr->sh_addralign = 0; | |
1281 | rela_hdr->size = 0; | |
1282 | } | |
1283 | } | |
1284 | if (asect->flags & SEC_ALLOC) | |
1285 | { | |
1286 | this_hdr->sh_flags |= SHF_ALLOC; | |
1287 | if (asect->flags & SEC_LOAD) | |
1288 | { | |
1289 | /* @@ Do something with sh_type? */ | |
1290 | } | |
1291 | } | |
1292 | if (!(asect->flags & SEC_READONLY)) | |
1293 | this_hdr->sh_flags |= SHF_WRITE; | |
1294 | if (asect->flags & SEC_CODE) | |
1295 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 JK |
1296 | } |
1297 | ||
244ffee7 | 1298 | |
d24928c0 | 1299 | #if 0 |
32090b8e KR |
1300 | /* |
1301 | xxxINTERNAL_FUNCTION | |
1302 | bfd_elf_locate_sh | |
244ffee7 | 1303 | |
32090b8e KR |
1304 | xxxSYNOPSIS |
1305 | struct elf_internal_shdr *bfd_elf_locate_sh (bfd *abfd, | |
1306 | struct strtab *strtab, | |
1307 | struct elf_internal_shdr *shdrp, | |
1308 | CONST char *name); | |
244ffee7 | 1309 | |
32090b8e KR |
1310 | xxxDESCRIPTION |
1311 | Helper function to locate an ELF section header given the | |
1312 | name of a BFD section. | |
1313 | */ | |
244ffee7 | 1314 | |
d24928c0 | 1315 | static struct elf_internal_shdr * |
32090b8e KR |
1316 | DEFUN (elf_locate_sh, (abfd, strtab, shdrp, name), |
1317 | bfd * abfd AND | |
1318 | struct strtab *strtab AND | |
d24928c0 | 1319 | struct elf_internal_shdr *shdrp AND |
32090b8e KR |
1320 | CONST char *name) |
1321 | { | |
1322 | Elf_Internal_Shdr *gotit = NULL; | |
1323 | int max, i; | |
244ffee7 | 1324 | |
32090b8e | 1325 | if (shdrp != NULL && strtab != NULL) |
244ffee7 | 1326 | { |
32090b8e KR |
1327 | max = elf_elfheader (abfd)->e_shnum; |
1328 | for (i = 1; i < max; i++) | |
1329 | { | |
1330 | if (!strcmp (strtab->tab + shdrp[i].sh_name, name)) | |
1331 | { | |
1332 | gotit = &shdrp[i]; | |
1333 | } | |
1334 | } | |
244ffee7 | 1335 | } |
32090b8e KR |
1336 | return gotit; |
1337 | } | |
d24928c0 | 1338 | #endif |
244ffee7 | 1339 | |
32090b8e KR |
1340 | /* Map symbol from it's internal number to the external number, moving |
1341 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1342 | |
32090b8e KR |
1343 | static INLINE int |
1344 | sym_is_global (sym) | |
1345 | asymbol *sym; | |
1346 | { | |
d24928c0 | 1347 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1348 | { |
32090b8e KR |
1349 | if (sym->flags & BSF_LOCAL) |
1350 | abort (); | |
1351 | return 1; | |
244ffee7 | 1352 | } |
d24928c0 KR |
1353 | if (sym->section == 0) |
1354 | { | |
1355 | /* Is this valid? */ | |
1356 | abort (); | |
1357 | ||
1358 | return 1; | |
1359 | } | |
32090b8e KR |
1360 | if (sym->section == &bfd_und_section) |
1361 | return 1; | |
1362 | if (bfd_is_com_section (sym->section)) | |
1363 | return 1; | |
1364 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1365 | return 0; | |
1366 | return 0; | |
1367 | } | |
244ffee7 | 1368 | |
32090b8e KR |
1369 | static void |
1370 | DEFUN (elf_map_symbols, (abfd), bfd * abfd) | |
1371 | { | |
1372 | int symcount = bfd_get_symcount (abfd); | |
1373 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1374 | asymbol **sect_syms; |
32090b8e KR |
1375 | int num_locals = 0; |
1376 | int num_globals = 0; | |
1377 | int num_locals2 = 0; | |
1378 | int num_globals2 = 0; | |
d24928c0 | 1379 | int max_index = 0; |
32090b8e | 1380 | int num_sections = 0; |
d24928c0 | 1381 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1382 | int idx; |
1383 | asection *asect; | |
6a3eb9b6 | 1384 | |
32090b8e KR |
1385 | #ifdef DEBUG |
1386 | fprintf (stderr, "elf_map_symbols\n"); | |
1387 | fflush (stderr); | |
1388 | #endif | |
244ffee7 | 1389 | |
e621c5cc ILT |
1390 | /* Add local symbols for each section for which there are relocs. |
1391 | FIXME: How can we tell which sections have relocs at this point? | |
1392 | Will reloc_count always be accurate? Actually, I think most ELF | |
1393 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1394 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1395 | { |
d24928c0 KR |
1396 | if (max_index < asect->index) |
1397 | max_index = asect->index; | |
244ffee7 JK |
1398 | } |
1399 | ||
d24928c0 KR |
1400 | max_index++; |
1401 | elf_num_section_syms (abfd) = max_index; | |
1402 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1403 | elf_section_syms (abfd) = sect_syms; | |
1404 | ||
1405 | BFD_ASSERT (sect_syms != 0); | |
1406 | ||
1407 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1408 | { |
1409 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
1410 | sym->the_bfd = abfd; | |
1411 | sym->name = asect->name; | |
1412 | sym->value = asect->vma; | |
1413 | sym->flags = BSF_SECTION_SYM; | |
1414 | sym->section = asect; | |
1415 | sect_syms[asect->index] = sym; | |
1416 | num_sections++; | |
d24928c0 | 1417 | #ifdef DEBUG |
e621c5cc ILT |
1418 | fprintf (stderr, |
1419 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1420 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1421 | #endif |
e621c5cc | 1422 | } |
d24928c0 | 1423 | |
32090b8e | 1424 | if (num_sections) |
244ffee7 | 1425 | { |
32090b8e KR |
1426 | if (syms) |
1427 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1428 | ((symcount + num_sections + 1) | |
1429 | * sizeof (asymbol *))); | |
1430 | else | |
1431 | syms = (asymbol **) bfd_alloc (abfd, | |
1432 | (num_sections + 1) * sizeof (asymbol *)); | |
244ffee7 | 1433 | |
32090b8e KR |
1434 | for (asect = abfd->sections; asect; asect = asect->next) |
1435 | { | |
d24928c0 KR |
1436 | if (sect_syms[asect->index]) |
1437 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1438 | } |
244ffee7 | 1439 | |
32090b8e KR |
1440 | syms[symcount] = (asymbol *) 0; |
1441 | bfd_set_symtab (abfd, syms, symcount); | |
1442 | } | |
244ffee7 | 1443 | |
d24928c0 KR |
1444 | elf_sym_extra (abfd) = sym_extra |
1445 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
244ffee7 | 1446 | |
32090b8e KR |
1447 | /* Identify and classify all of the symbols. */ |
1448 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1449 | { |
32090b8e KR |
1450 | if (!sym_is_global (syms[idx])) |
1451 | num_locals++; | |
1452 | else | |
1453 | num_globals++; | |
244ffee7 | 1454 | } |
32090b8e KR |
1455 | |
1456 | /* Now provide mapping information. Add +1 for skipping over the | |
1457 | dummy symbol. */ | |
1458 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1459 | { |
d24928c0 | 1460 | syms[idx]->udata = (PTR) &sym_extra[idx]; |
32090b8e | 1461 | if (!sym_is_global (syms[idx])) |
d24928c0 | 1462 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1463 | else |
d24928c0 | 1464 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1465 | } |
1466 | ||
32090b8e KR |
1467 | elf_num_locals (abfd) = num_locals; |
1468 | elf_num_globals (abfd) = num_globals; | |
1469 | } | |
244ffee7 | 1470 | |
32090b8e KR |
1471 | static void assign_section_numbers (); |
1472 | static void assign_file_positions_except_relocs (); | |
244ffee7 | 1473 | |
32090b8e KR |
1474 | static boolean |
1475 | DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd) | |
1476 | { | |
1477 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1478 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
1479 | struct strtab *shstrtab; | |
1480 | int count, maxsections; | |
244ffee7 | 1481 | |
32090b8e | 1482 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1483 | |
32090b8e | 1484 | assign_section_numbers (abfd); |
244ffee7 | 1485 | |
32090b8e | 1486 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
244ffee7 | 1487 | |
32090b8e | 1488 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
244ffee7 | 1489 | |
32090b8e | 1490 | swap_out_syms (abfd); |
244ffee7 | 1491 | |
32090b8e KR |
1492 | assign_file_positions_except_relocs (abfd); |
1493 | ||
1494 | return true; | |
1495 | } | |
1496 | ||
1497 | static boolean | |
1498 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), | |
1499 | bfd * abfd AND | |
1500 | Elf_Internal_Ehdr * i_ehdrp AND | |
1501 | Elf_Internal_Phdr * i_phdrp AND | |
1502 | Elf32_Half phdr_cnt) | |
244ffee7 | 1503 | { |
32090b8e | 1504 | /* first program header entry goes after the file header */ |
300adb31 | 1505 | int outbase = i_ehdrp->e_phoff; |
244ffee7 | 1506 | int i; |
32090b8e KR |
1507 | Elf_External_Phdr x_phdr; |
1508 | ||
1509 | for (i = 0; i < phdr_cnt; i++) | |
244ffee7 | 1510 | { |
32090b8e KR |
1511 | elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr); |
1512 | bfd_seek (abfd, outbase, SEEK_SET); | |
1513 | bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd); | |
1514 | outbase += sizeof (x_phdr); | |
244ffee7 | 1515 | } |
32090b8e KR |
1516 | |
1517 | return true; | |
244ffee7 JK |
1518 | } |
1519 | ||
32090b8e KR |
1520 | static const Elf_Internal_Shdr null_shdr; |
1521 | ||
1522 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1523 | too. The link/info pointers for the standard section types are filled | |
1524 | in here too, while we're at it. (Link pointers for .stab sections are | |
1525 | not filled in here.) */ | |
fce36137 | 1526 | static void |
32090b8e | 1527 | assign_section_numbers (abfd) |
fce36137 | 1528 | bfd *abfd; |
fce36137 | 1529 | { |
32090b8e KR |
1530 | struct elf_obj_tdata *t = elf_tdata (abfd); |
1531 | asection *sec; | |
1532 | int section_number = 1; | |
1533 | int i; | |
1534 | Elf_Internal_Shdr **i_shdrp; | |
244ffee7 | 1535 | |
32090b8e KR |
1536 | t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length; |
1537 | t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab; | |
1538 | shstrtab_length_fixed = 1; | |
244ffee7 | 1539 | |
32090b8e KR |
1540 | t->shstrtab_section = section_number++; |
1541 | elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section; | |
1542 | if (abfd->symcount) | |
1543 | { | |
1544 | t->symtab_section = section_number++; | |
1545 | t->strtab_section = section_number++; | |
1546 | t->symtab_hdr.sh_link = t->strtab_section; | |
1547 | } | |
1548 | for (sec = abfd->sections; sec; sec = sec->next) | |
1549 | { | |
1550 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1551 | d->this_idx = section_number++; | |
300adb31 | 1552 | if (sec->flags & SEC_RELOC) |
fce36137 | 1553 | { |
32090b8e KR |
1554 | d->rel_idx = section_number++; |
1555 | d->rel_hdr.sh_link = t->symtab_section; | |
1556 | d->rel_hdr.sh_info = d->this_idx; | |
244ffee7 | 1557 | } |
fce36137 | 1558 | else |
32090b8e KR |
1559 | d->rel_idx = 0; |
1560 | /* No handling for per-section string tables currently. */ | |
1561 | } | |
1562 | elf_elfheader(abfd)->e_shnum = section_number; | |
1563 | ||
1564 | /* Set up the list of section header pointers, in agreement with the | |
1565 | indices. */ | |
300adb31 KR |
1566 | i_shdrp = (Elf_Internal_Shdr **) |
1567 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)); | |
32090b8e KR |
1568 | elf_elfsections(abfd) = i_shdrp; |
1569 | for (i = 0; i < section_number; i++) | |
1570 | i_shdrp[i] = 0; | |
1571 | ||
1572 | i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr; | |
1573 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1574 | if (abfd->symcount) | |
1575 | { | |
1576 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1577 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
244ffee7 | 1578 | } |
32090b8e KR |
1579 | for (sec = abfd->sections; sec; sec = sec->next) |
1580 | { | |
1581 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1582 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1583 | if (d->rel_idx) | |
1584 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1585 | } | |
1586 | /* Make sure we got everything.... */ | |
1587 | for (i = 0; i < section_number; i++) | |
1588 | if (i_shdrp[i] == 0) | |
1589 | abort (); | |
1590 | } | |
1591 | ||
1592 | static INLINE file_ptr | |
1593 | assign_file_position_for_section (i_shdrp, offset) | |
1594 | Elf_Internal_Shdr *i_shdrp; | |
1595 | file_ptr offset; | |
1596 | { | |
1597 | i_shdrp->sh_offset = offset; | |
300adb31 KR |
1598 | if (i_shdrp->sh_type != SHT_NOBITS) |
1599 | offset += i_shdrp->sh_size; | |
32090b8e | 1600 | return offset; |
244ffee7 JK |
1601 | } |
1602 | ||
300adb31 KR |
1603 | static INLINE file_ptr |
1604 | assign_file_positions_for_symtab_and_strtabs (abfd, off) | |
1605 | bfd *abfd; | |
1606 | file_ptr off; | |
1607 | { | |
1608 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1609 | ||
1610 | off = assign_file_position_for_section (&t->shstrtab_hdr, off); | |
1611 | off = assign_file_position_for_section (&t->symtab_hdr, off); | |
1612 | off = assign_file_position_for_section (&t->strtab_hdr, off); | |
1613 | return off; | |
1614 | } | |
1615 | ||
1616 | struct seg_info { | |
1617 | bfd_vma low, mem_size; | |
1618 | file_ptr file_size; | |
1619 | int start_pos; | |
1620 | int sh_flags; | |
1621 | struct seg_info *next; | |
1622 | }; | |
1623 | ||
1624 | static void | |
1625 | map_program_segments (abfd) | |
1626 | bfd *abfd; | |
1627 | { | |
1628 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1629 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1630 | Elf_Internal_Shdr *i_shdrp; | |
1631 | Elf_Internal_Phdr *phdr; | |
1632 | char *done; | |
1633 | int i, n_left = 0; | |
1634 | file_ptr lowest_offset = 0; | |
1635 | struct seg_info *seg = 0; | |
1636 | ||
e74034d8 | 1637 | done = (char *) alloca (i_ehdrp->e_shnum); |
300adb31 KR |
1638 | memset (done, 0, i_ehdrp->e_shnum); |
1639 | for (i = 0; i < i_ehdrp->e_shnum; i++) | |
1640 | { | |
1641 | i_shdrp = i_shdrpp[i]; | |
1642 | /* If it's going to be mapped in, it's been assigned a position. */ | |
1643 | if (i_shdrp->sh_offset + 1 == 0) | |
1644 | { | |
1645 | /* Well, not really, but we won't process it here. */ | |
1646 | done[i] = 1; | |
1647 | continue; | |
1648 | } | |
1649 | if (i_shdrp->sh_offset < lowest_offset | |
1650 | || lowest_offset == 0) | |
1651 | lowest_offset = i_shdrp->sh_offset; | |
1652 | /* Only interested in PROGBITS or NOBITS for generating segments. */ | |
1653 | switch (i_shdrp->sh_type) | |
1654 | { | |
1655 | case SHT_PROGBITS: | |
1656 | case SHT_NOBITS: | |
1657 | break; | |
1658 | default: | |
1659 | done[i] = 1; | |
1660 | } | |
1661 | if (!done[i]) | |
1662 | n_left++; | |
1663 | } | |
1664 | while (n_left) | |
1665 | { | |
1666 | bfd_vma lowest_vma = -1, high; | |
1667 | int low_sec = 0; | |
1668 | int mem_size; | |
1669 | int file_size = 0; | |
1670 | ||
1671 | for (i = 1; i < i_ehdrp->e_shnum; i++) | |
1672 | { | |
1673 | i_shdrp = i_shdrpp[i]; | |
1674 | if (!done[i] && i_shdrp->sh_addr < lowest_vma) | |
1675 | { | |
1676 | lowest_vma = i_shdrp->sh_addr; | |
1677 | low_sec = i; | |
1678 | } | |
1679 | } | |
1680 | if (low_sec == 0) | |
1681 | abort (); | |
1682 | /* So now we know the lowest vma of any unassigned sections; start | |
1683 | a segment there. */ | |
1684 | { | |
1685 | struct seg_info *s; | |
1686 | s = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info)); | |
1687 | s->next = seg; | |
1688 | seg = s; | |
1689 | } | |
1690 | seg->low = lowest_vma; | |
1691 | i_shdrp = i_shdrpp[low_sec]; | |
1692 | seg->start_pos = i_shdrp->sh_offset; | |
1693 | seg->sh_flags = i_shdrp->sh_flags; | |
1694 | done[low_sec] = 1, n_left--; | |
1695 | mem_size = i_shdrp->sh_size; | |
1696 | high = lowest_vma + i_shdrp->sh_size; | |
1697 | ||
1698 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1699 | file_size = i_shdrp->sh_size; | |
1700 | ||
1701 | for (i = 0; i < i_ehdrp->e_shnum; i++) | |
1702 | { | |
1703 | file_ptr f1; | |
1704 | ||
1705 | if (file_size != mem_size) | |
1706 | break; | |
1707 | if (done[i]) | |
1708 | continue; | |
1709 | i_shdrp = i_shdrpp[i]; | |
1710 | /* position of next byte on disk */ | |
1711 | f1 = seg->start_pos + file_size; | |
1712 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1713 | { | |
1714 | if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high) | |
1715 | continue; | |
1716 | } | |
1717 | else /* sh_type == NOBITS */ | |
1718 | { | |
1719 | /* If the section in question has no contents in the disk | |
1720 | file, we really don't care where it supposedly starts. | |
1721 | But we don't want to bother merging it into this segment | |
1722 | if it doesn't start on this memory page. */ | |
1723 | bfd_vma page1, page2; | |
1724 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1725 | ||
1726 | /* page number in address space of current end of seg */ | |
1727 | page1 = (high - 1 + maxpagesize - 1) / maxpagesize; | |
1728 | /* page number in address space of start of this section */ | |
1729 | page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize; | |
1730 | ||
1731 | if (page1 != page2) | |
1732 | continue; | |
1733 | } | |
1734 | done[i] = 1, n_left--; | |
1735 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1736 | file_size = i_shdrp->sh_offset + i_shdrp->sh_size - seg->start_pos; | |
1737 | mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - seg->low; | |
1738 | high = i_shdrp->sh_addr + i_shdrp->sh_size; | |
1739 | i = 0; | |
1740 | } | |
1741 | seg->file_size = file_size; | |
1742 | seg->mem_size = mem_size; | |
1743 | } | |
1744 | /* Now do something with the list of segments we've built up. */ | |
1745 | { | |
1746 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1747 | struct seg_info *s; | |
1748 | int n_segs = 0; | |
1749 | int sz; | |
1750 | ||
1751 | for (s = seg; s; s = s->next) | |
1752 | { | |
1753 | n_segs++; | |
1754 | } | |
1755 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1756 | sz = sizeof (Elf_External_Phdr) * n_segs; | |
1757 | if (i_ehdrp->e_ehsize + sz <= lowest_offset) | |
1758 | i_ehdrp->e_phoff = i_ehdrp->e_ehsize; | |
1759 | else | |
1760 | { | |
1761 | i_ehdrp->e_phoff = elf_tdata (abfd)->next_file_pos; | |
1762 | elf_tdata (abfd)->next_file_pos += sz; | |
1763 | } | |
e74034d8 KR |
1764 | phdr = (Elf_Internal_Phdr*) bfd_alloc (abfd, |
1765 | n_segs * sizeof (Elf_Internal_Phdr)); | |
300adb31 KR |
1766 | elf_tdata (abfd)->phdr = phdr; |
1767 | while (seg) | |
1768 | { | |
1769 | phdr->p_type = PT_LOAD; /* only type we really support so far */ | |
1770 | phdr->p_offset = seg->start_pos; | |
1771 | phdr->p_vaddr = seg->low; | |
1772 | phdr->p_paddr = 0; | |
1773 | phdr->p_filesz = seg->file_size; | |
1774 | phdr->p_memsz = seg->mem_size; | |
1775 | phdr->p_flags = PF_R; | |
1776 | phdr->p_align = maxpagesize; /* ? */ | |
1777 | if (seg->sh_flags & SHF_WRITE) | |
e621c5cc ILT |
1778 | /* SysVr4 ELF docs say "data segments normally have read, write, |
1779 | and execute permissions." */ | |
1780 | phdr->p_flags |= (PF_W | PF_X); | |
300adb31 KR |
1781 | if (seg->sh_flags & SHF_EXECINSTR) |
1782 | phdr->p_flags |= PF_X; | |
1783 | phdr++; | |
1784 | seg = seg->next; | |
1785 | } | |
1786 | i_ehdrp->e_phnum = n_segs; | |
1787 | } | |
1788 | elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum); | |
1789 | } | |
1790 | ||
244ffee7 | 1791 | static void |
32090b8e KR |
1792 | assign_file_positions_except_relocs (abfd) |
1793 | bfd *abfd; | |
244ffee7 | 1794 | { |
32090b8e KR |
1795 | /* For now, we ignore the possibility of having program segments, which |
1796 | may require some alignment in the file. That'll require padding, and | |
1797 | some interesting calculations to optimize file space usage. | |
244ffee7 | 1798 | |
32090b8e KR |
1799 | Also, since the application may change the list of relocations for |
1800 | a given section, we don't figure them in here. We'll put them at the | |
1801 | end of the file, at positions computed during bfd_close. | |
244ffee7 | 1802 | |
300adb31 KR |
1803 | The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ... |
1804 | or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */ | |
32090b8e KR |
1805 | |
1806 | file_ptr off; | |
1807 | int i; | |
1808 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1809 | Elf_Internal_Shdr *i_shdrp; | |
1810 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
300adb31 | 1811 | int exec_p = (abfd->flags & EXEC_P) != 0; |
32090b8e | 1812 | |
300adb31 | 1813 | /* Everything starts after the ELF file header. */ |
32090b8e | 1814 | off = i_ehdrp->e_ehsize; |
300adb31 KR |
1815 | |
1816 | if (!exec_p) | |
1817 | { | |
1818 | /* Section headers. */ | |
1819 | i_ehdrp->e_shoff = off; | |
1820 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
1821 | ||
1822 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); | |
1823 | } | |
32090b8e KR |
1824 | for (i = 0; i < i_ehdrp->e_shnum; i++) |
1825 | { | |
1826 | i_shdrp = i_shdrpp[i]; | |
1827 | if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA) | |
244ffee7 | 1828 | { |
32090b8e KR |
1829 | i_shdrp->sh_offset = -1; |
1830 | continue; | |
244ffee7 | 1831 | } |
300adb31 KR |
1832 | if (exec_p) |
1833 | { | |
1834 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1835 | if (maxpagesize == 0) | |
1836 | maxpagesize = 1; /* make the arithmetic work */ | |
1837 | /* This isn't necessarily going to give the best packing, if the | |
1838 | segments require padding between them, but since that isn't | |
1839 | usually the case, this'll do. */ | |
1840 | if ((i_shdrp->sh_flags & SHF_ALLOC) == 0) | |
1841 | { | |
1842 | i_shdrp->sh_offset = -1; | |
1843 | continue; | |
1844 | } | |
1845 | /* Blindly assume that the segments are ordered optimally. With | |
1846 | the default LD script, they will be. */ | |
1847 | { | |
1848 | /* need big unsigned type */ | |
1849 | bfd_vma addtl_off; | |
1850 | addtl_off = i_shdrp->sh_addr - off; | |
1851 | addtl_off = addtl_off % maxpagesize; | |
1852 | if (addtl_off) | |
1853 | { | |
1854 | off += addtl_off; | |
1855 | } | |
1856 | } | |
1857 | if (i_shdrp->sh_type == SHT_NOBITS) | |
1858 | { | |
1859 | file_ptr off2; | |
1860 | i_shdrp->sh_offset = off; | |
1861 | if (off % maxpagesize != 0) | |
1862 | off2 = maxpagesize - (off % maxpagesize); | |
1863 | if (off2 > i_shdrp->sh_size) | |
1864 | off2 = i_shdrp->sh_size; | |
1865 | off += off2; | |
1866 | } | |
1867 | } | |
32090b8e | 1868 | off = assign_file_position_for_section (i_shdrp, off); |
300adb31 KR |
1869 | if (exec_p |
1870 | && get_elf_backend_data(abfd)->maxpagesize > 1 | |
1871 | && i_shdrp->sh_type == SHT_PROGBITS | |
1872 | && (i_shdrp->sh_flags & SHF_ALLOC) | |
1873 | && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data(abfd)->maxpagesize != 0) | |
1874 | abort (); | |
1875 | } | |
1876 | if (exec_p) | |
1877 | { | |
1878 | elf_tdata (abfd)->next_file_pos = off; | |
1879 | map_program_segments (abfd); | |
1880 | off = elf_tdata (abfd)->next_file_pos; | |
1881 | ||
1882 | /* Section headers. */ | |
1883 | i_ehdrp->e_shoff = off; | |
1884 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
1885 | ||
1886 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); | |
1887 | ||
1888 | for (i = 0; i < i_ehdrp->e_shnum; i++) | |
1889 | { | |
1890 | i_shdrp = i_shdrpp[i]; | |
1891 | if (i_shdrp->sh_offset + 1 == 0 | |
1892 | && i_shdrp->sh_type != SHT_REL | |
1893 | && i_shdrp->sh_type != SHT_RELA) | |
1894 | off = assign_file_position_for_section (i_shdrp, off); | |
1895 | } | |
244ffee7 | 1896 | } |
32090b8e | 1897 | elf_tdata (abfd)->next_file_pos = off; |
244ffee7 JK |
1898 | } |
1899 | ||
32090b8e KR |
1900 | static boolean |
1901 | prep_headers (abfd) | |
1902 | bfd *abfd; | |
1903 | { | |
1904 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1905 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1906 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
1907 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1908 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
244ffee7 | 1909 | |
32090b8e KR |
1910 | int count; |
1911 | int scnt; | |
1912 | struct strtab *shstrtab; | |
244ffee7 | 1913 | |
32090b8e KR |
1914 | i_ehdrp = elf_elfheader (abfd); |
1915 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 1916 | |
32090b8e KR |
1917 | shstrtab = bfd_new_strtab (abfd); |
1918 | elf_shstrtab (abfd) = shstrtab; | |
244ffee7 | 1919 | |
32090b8e KR |
1920 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
1921 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
1922 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
1923 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 1924 | |
32090b8e KR |
1925 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
1926 | i_ehdrp->e_ident[EI_DATA] = | |
1927 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
1928 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 1929 | |
32090b8e KR |
1930 | for (count = EI_PAD; count < EI_NIDENT; count++) |
1931 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 1932 | |
32090b8e KR |
1933 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
1934 | switch (bfd_get_arch (abfd)) | |
fce36137 | 1935 | { |
32090b8e KR |
1936 | case bfd_arch_unknown: |
1937 | i_ehdrp->e_machine = EM_NONE; | |
1938 | break; | |
1939 | case bfd_arch_sparc: | |
1940 | i_ehdrp->e_machine = EM_SPARC; | |
1941 | /* start-sanitize-v9 */ | |
1942 | #if ARCH_SIZE == 64 | |
1943 | i_ehdrp->e_machine = EM_SPARC64; | |
1944 | #endif | |
1945 | /* end-sanitize-v9 */ | |
1946 | break; | |
1947 | case bfd_arch_i386: | |
1948 | i_ehdrp->e_machine = EM_386; | |
1949 | break; | |
1950 | case bfd_arch_m68k: | |
1951 | i_ehdrp->e_machine = EM_68K; | |
1952 | break; | |
1953 | case bfd_arch_m88k: | |
1954 | i_ehdrp->e_machine = EM_88K; | |
1955 | break; | |
1956 | case bfd_arch_i860: | |
1957 | i_ehdrp->e_machine = EM_860; | |
1958 | break; | |
1959 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
1960 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
1961 | break; | |
1962 | case bfd_arch_hppa: | |
1963 | i_ehdrp->e_machine = EM_HPPA; | |
1964 | break; | |
1965 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ | |
1966 | default: | |
1967 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 1968 | } |
32090b8e KR |
1969 | i_ehdrp->e_version = EV_CURRENT; |
1970 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 1971 | |
32090b8e KR |
1972 | /* no program header, for now. */ |
1973 | i_ehdrp->e_phoff = 0; | |
1974 | i_ehdrp->e_phentsize = 0; | |
1975 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 1976 | |
32090b8e KR |
1977 | /* each bfd section is section header entry */ |
1978 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
1979 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 1980 | |
32090b8e KR |
1981 | /* if we're building an executable, we'll need a program header table */ |
1982 | if (abfd->flags & EXEC_P) | |
244ffee7 | 1983 | { |
300adb31 | 1984 | /* it all happens later */ |
32090b8e KR |
1985 | #if 0 |
1986 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 1987 | |
32090b8e KR |
1988 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
1989 | Elf_Internal_Phdrs */ | |
1990 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
1991 | i_ehdrp->e_phoff = outbase; | |
1992 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
1993 | #endif | |
244ffee7 | 1994 | } |
32090b8e | 1995 | else |
244ffee7 | 1996 | { |
32090b8e KR |
1997 | i_ehdrp->e_phentsize = 0; |
1998 | i_phdrp = 0; | |
1999 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2000 | } |
2001 | ||
32090b8e KR |
2002 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2003 | ".symtab"); | |
2004 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2005 | ".strtab"); | |
2006 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2007 | ".shstrtab"); | |
244ffee7 | 2008 | |
244ffee7 JK |
2009 | } |
2010 | ||
32090b8e KR |
2011 | static void |
2012 | swap_out_syms (abfd) | |
2013 | bfd *abfd; | |
244ffee7 | 2014 | { |
32090b8e | 2015 | struct strtab *shstrtab = elf_shstrtab (abfd); |
244ffee7 | 2016 | |
32090b8e | 2017 | elf_map_symbols (abfd); |
244ffee7 | 2018 | |
32090b8e KR |
2019 | /* Dump out the symtabs. */ |
2020 | { | |
2021 | int symcount = bfd_get_symcount (abfd); | |
2022 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2023 | struct strtab *stt = bfd_new_strtab (abfd); | |
2024 | Elf_Internal_Shdr *symtab_hdr; | |
2025 | Elf_Internal_Shdr *symstrtab_hdr; | |
2026 | Elf_External_Sym *outbound_syms; | |
2027 | int idx; | |
244ffee7 | 2028 | |
32090b8e KR |
2029 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2030 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2031 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2032 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2033 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
244ffee7 | 2034 | |
32090b8e KR |
2035 | /* see assert in elf_fake_sections that supports this: */ |
2036 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
2037 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2038 | |
32090b8e KR |
2039 | outbound_syms = (Elf_External_Sym *) |
2040 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
2041 | /* now generate the data (for "contents") */ | |
2042 | { | |
2043 | /* Fill in zeroth symbol and swap it out. */ | |
2044 | Elf_Internal_Sym sym; | |
2045 | sym.st_name = 0; | |
2046 | sym.st_value = 0; | |
2047 | sym.st_size = 0; | |
2048 | sym.st_info = 0; | |
2049 | sym.st_other = 0; | |
2050 | sym.st_shndx = SHN_UNDEF; | |
2051 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2052 | } |
32090b8e KR |
2053 | for (idx = 0; idx < symcount; idx++) |
2054 | { | |
2055 | Elf_Internal_Sym sym; | |
2056 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 2057 | |
32090b8e KR |
2058 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2059 | /* Section symbols have no names. */ | |
2060 | sym.st_name = 0; | |
2061 | else | |
2062 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
244ffee7 | 2063 | |
32090b8e | 2064 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2065 | { |
32090b8e KR |
2066 | /* ELF common symbols put the alignment into the `value' field, |
2067 | and the size into the `size' field. This is backwards from | |
2068 | how BFD handles it, so reverse it here. */ | |
2069 | sym.st_size = value; | |
2070 | /* Should retrieve this from somewhere... */ | |
2071 | sym.st_value = 16; | |
2072 | sym.st_shndx = SHN_COMMON; | |
244ffee7 JK |
2073 | } |
2074 | else | |
2075 | { | |
32090b8e | 2076 | asection *sec = syms[idx]->section; |
e74034d8 | 2077 | elf_symbol_type *type_ptr; |
32090b8e | 2078 | int shndx; |
244ffee7 | 2079 | |
32090b8e KR |
2080 | if (sec->output_section) |
2081 | { | |
2082 | value += sec->output_offset; | |
2083 | sec = sec->output_section; | |
2084 | } | |
2085 | value += sec->vma; | |
2086 | sym.st_value = value; | |
e74034d8 KR |
2087 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2088 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
32090b8e KR |
2089 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2090 | if (shndx == -1) | |
2091 | { | |
2092 | asection *sec2; | |
2093 | /* Writing this would be a hell of a lot easier if we had | |
2094 | some decent documentation on bfd, and knew what to expect | |
2095 | of the library, and what to demand of applications. For | |
2096 | example, it appears that `objcopy' might not set the | |
2097 | section of a symbol to be a section that is actually in | |
2098 | the output file. */ | |
2099 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
2100 | assert (sec2 != 0); | |
2101 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); | |
2102 | assert (shndx != -1); | |
2103 | } | |
2104 | } | |
244ffee7 | 2105 | |
32090b8e KR |
2106 | if (bfd_is_com_section (syms[idx]->section)) |
2107 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
2108 | else if (syms[idx]->section == &bfd_und_section) | |
2109 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
32090b8e KR |
2110 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2111 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2112 | else if (syms[idx]->flags & BSF_FILE) | |
2113 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2114 | else |
32090b8e | 2115 | { |
d24928c0 KR |
2116 | int bind = STB_LOCAL; |
2117 | int type = STT_OBJECT; | |
2118 | unsigned int flags = syms[idx]->flags; | |
2119 | ||
2120 | if (flags & BSF_LOCAL) | |
2121 | bind = STB_LOCAL; | |
2122 | else if (flags & BSF_WEAK) | |
2123 | bind = STB_WEAK; | |
2124 | else if (flags & BSF_GLOBAL) | |
2125 | bind = STB_GLOBAL; | |
2126 | ||
2127 | if (flags & BSF_FUNCTION) | |
2128 | type = STT_FUNC; | |
2129 | ||
2130 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2131 | } |
244ffee7 | 2132 | |
32090b8e KR |
2133 | sym.st_other = 0; |
2134 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2135 | (outbound_syms |
2136 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2137 | } |
2138 | ||
2139 | symtab_hdr->contents = (PTR) outbound_syms; | |
2140 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2141 | symstrtab_hdr->sh_size = stt->length; | |
2142 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2143 | ||
2144 | symstrtab_hdr->sh_flags = 0; | |
2145 | symstrtab_hdr->sh_addr = 0; | |
2146 | symstrtab_hdr->sh_entsize = 0; | |
2147 | symstrtab_hdr->sh_link = 0; | |
2148 | symstrtab_hdr->sh_info = 0; | |
2149 | symstrtab_hdr->sh_addralign = 0; | |
2150 | symstrtab_hdr->size = 0; | |
2151 | } | |
2152 | ||
2153 | /* put the strtab out too... */ | |
2154 | { | |
2155 | Elf_Internal_Shdr *this_hdr; | |
2156 | ||
2157 | this_hdr = &elf_tdata(abfd)->shstrtab_hdr; | |
2158 | this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
2159 | this_hdr->sh_size = elf_shstrtab (abfd)->length; | |
2160 | this_hdr->sh_type = SHT_STRTAB; | |
2161 | this_hdr->sh_flags = 0; | |
2162 | this_hdr->sh_addr = 0; | |
2163 | this_hdr->sh_entsize = 0; | |
2164 | this_hdr->sh_addralign = 0; | |
2165 | this_hdr->size = 0; | |
2166 | } | |
244ffee7 JK |
2167 | } |
2168 | ||
32090b8e KR |
2169 | static boolean |
2170 | write_shdrs_and_ehdr (abfd) | |
2171 | bfd *abfd; | |
244ffee7 | 2172 | { |
32090b8e KR |
2173 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2174 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
2175 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
2176 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
2177 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
244ffee7 | 2178 | |
32090b8e KR |
2179 | int count; |
2180 | int scnt; | |
2181 | struct strtab *shstrtab; | |
244ffee7 | 2182 | |
32090b8e KR |
2183 | i_ehdrp = elf_elfheader (abfd); |
2184 | i_shdrp = elf_elfsections (abfd); | |
2185 | shstrtab = elf_shstrtab (abfd); | |
2186 | ||
2187 | /* swap the header before spitting it out... */ | |
2188 | ||
2189 | #if DEBUG & 1 | |
2190 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2191 | #endif |
32090b8e KR |
2192 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
2193 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); | |
2194 | bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd); | |
244ffee7 | 2195 | |
32090b8e KR |
2196 | /* at this point we've concocted all the ELF sections... */ |
2197 | x_shdrp = (Elf_External_Shdr *) | |
2198 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2199 | if (!x_shdrp) | |
2200 | { | |
2201 | bfd_error = no_memory; | |
2202 | return false; | |
2203 | } | |
2204 | ||
2205 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2206 | { | |
2207 | #if DEBUG & 2 | |
2208 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2209 | i_shdrp[count]); | |
244ffee7 | 2210 | #endif |
32090b8e KR |
2211 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2212 | } | |
2213 | bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET); | |
2214 | bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd); | |
2215 | /* need to dump the string table too... */ | |
244ffee7 | 2216 | |
32090b8e KR |
2217 | return true; |
2218 | } | |
244ffee7 | 2219 | |
32090b8e KR |
2220 | static void |
2221 | assign_file_positions_for_relocs (abfd) | |
2222 | bfd *abfd; | |
2223 | { | |
2224 | file_ptr off = elf_tdata(abfd)->next_file_pos; | |
2225 | int i; | |
2226 | Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd); | |
2227 | Elf_Internal_Shdr *shdrp; | |
2228 | for (i = 0; i < elf_elfheader(abfd)->e_shnum; i++) | |
2229 | { | |
2230 | shdrp = shdrpp[i]; | |
2231 | if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA) | |
2232 | continue; | |
2233 | off = assign_file_position_for_section (shdrp, off); | |
2234 | } | |
2235 | elf_tdata(abfd)->next_file_pos = off; | |
2236 | } | |
244ffee7 | 2237 | |
32090b8e KR |
2238 | boolean |
2239 | DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd) | |
2240 | { | |
2241 | Elf_Internal_Ehdr *i_ehdrp; | |
2242 | Elf_Internal_Shdr **i_shdrp; | |
2243 | int count; | |
244ffee7 | 2244 | |
32090b8e KR |
2245 | if (abfd->output_has_begun == false) |
2246 | { | |
32090b8e | 2247 | prep_headers (abfd); |
32090b8e | 2248 | elf_compute_section_file_positions (abfd); |
32090b8e KR |
2249 | abfd->output_has_begun = true; |
2250 | } | |
244ffee7 | 2251 | |
32090b8e KR |
2252 | i_shdrp = elf_elfsections (abfd); |
2253 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2254 | |
32090b8e | 2255 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2256 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2257 | |
32090b8e KR |
2258 | /* After writing the headers, we need to write the sections too... */ |
2259 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
e621c5cc ILT |
2260 | { |
2261 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2262 | ||
2263 | if (bed->elf_backend_section_processing) | |
2264 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2265 | if (i_shdrp[count]->contents) | |
2266 | { | |
2267 | bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET); | |
2268 | bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, | |
2269 | abfd); | |
2270 | } | |
2271 | } | |
32090b8e KR |
2272 | return write_shdrs_and_ehdr (abfd); |
2273 | } | |
244ffee7 | 2274 | |
32090b8e KR |
2275 | /* Given an index of a section, retrieve a pointer to it. Note |
2276 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2277 | 0 being an illegal index. */ | |
244ffee7 | 2278 | |
32090b8e KR |
2279 | /* In the original, each ELF section went into exactly one BFD |
2280 | section. This doesn't really make sense, so we need a real mapping. | |
2281 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2282 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2283 | |
32090b8e KR |
2284 | static struct sec * |
2285 | DEFUN (section_from_elf_index, (abfd, index), | |
2286 | bfd * abfd AND | |
2287 | int index) | |
2288 | { | |
2289 | /* @@ Is bfd_com_section really correct in all the places it could | |
2290 | be returned from this routine? */ | |
244ffee7 | 2291 | |
32090b8e KR |
2292 | if (index == SHN_ABS) |
2293 | return &bfd_com_section; /* not abs? */ | |
2294 | if (index == SHN_COMMON) | |
2295 | return &bfd_com_section; | |
244ffee7 | 2296 | |
32090b8e KR |
2297 | if (index > elf_elfheader (abfd)->e_shnum) |
2298 | return 0; | |
244ffee7 JK |
2299 | |
2300 | { | |
32090b8e | 2301 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2302 | |
32090b8e | 2303 | switch (hdr->sh_type) |
244ffee7 | 2304 | { |
32090b8e KR |
2305 | /* ELF sections that map to BFD sections */ |
2306 | case SHT_PROGBITS: | |
2307 | case SHT_NOBITS: | |
2308 | if (!hdr->rawdata) | |
2309 | bfd_section_from_shdr (abfd, index); | |
2310 | return (struct sec *) hdr->rawdata; | |
244ffee7 | 2311 | |
32090b8e KR |
2312 | default: |
2313 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2314 | } |
244ffee7 | 2315 | } |
32090b8e | 2316 | } |
244ffee7 | 2317 | |
32090b8e KR |
2318 | /* given a section, search the header to find them... */ |
2319 | static int | |
2320 | DEFUN (elf_section_from_bfd_section, (abfd, asect), | |
2321 | bfd * abfd AND | |
2322 | struct sec *asect) | |
2323 | { | |
2324 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2325 | int index; | |
2326 | Elf_Internal_Shdr *hdr; | |
2327 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2328 | |
32090b8e KR |
2329 | if (asect == &bfd_abs_section) |
2330 | return SHN_ABS; | |
2331 | if (asect == &bfd_com_section) | |
2332 | return SHN_COMMON; | |
2333 | if (asect == &bfd_und_section) | |
2334 | return SHN_UNDEF; | |
244ffee7 | 2335 | |
32090b8e KR |
2336 | for (index = 0; index < maxindex; index++) |
2337 | { | |
2338 | hdr = i_shdrp[index]; | |
2339 | switch (hdr->sh_type) | |
2340 | { | |
2341 | /* ELF sections that map to BFD sections */ | |
2342 | case SHT_PROGBITS: | |
2343 | case SHT_NOBITS: | |
e621c5cc | 2344 | case SHT_NOTE: |
32090b8e KR |
2345 | if (hdr->rawdata) |
2346 | { | |
2347 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2348 | return index; | |
2349 | } | |
2350 | break; | |
2351 | default: | |
e621c5cc ILT |
2352 | { |
2353 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2354 | ||
2355 | if (bed->elf_backend_section_from_bfd_section) | |
2356 | if ((*bed->elf_backend_section_from_bfd_section) (abfd, hdr, asect)) | |
2357 | return index; | |
2358 | } | |
32090b8e KR |
2359 | break; |
2360 | } | |
2361 | } | |
2362 | return -1; | |
2363 | } | |
244ffee7 | 2364 | |
32090b8e KR |
2365 | /* given a symbol, return the bfd index for that symbol. */ |
2366 | static int | |
2367 | DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr), | |
2368 | bfd * abfd AND | |
2369 | struct symbol_cache_entry **asym_ptr_ptr) | |
2370 | { | |
2371 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
2372 | CONST char *name = asym_ptr->name; | |
2373 | int idx; | |
2374 | int symcount = bfd_get_symcount (abfd); | |
d24928c0 | 2375 | flagword flags = asym_ptr->flags; |
32090b8e KR |
2376 | asymbol **syms = bfd_get_outsymbols (abfd); |
2377 | ||
d24928c0 KR |
2378 | /* When gas creates relocations against local labels, it creates its |
2379 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2380 | symbol chain, so udata is 0. When the linker is generating |
2381 | relocatable output, this section symbol may be for one of the | |
2382 | input sections rather than the output section. */ | |
d24928c0 KR |
2383 | if (asym_ptr->udata == (PTR) 0 |
2384 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2385 | && asym_ptr->section) |
2386 | { | |
2387 | int indx; | |
2388 | ||
2389 | if (asym_ptr->section->output_section != NULL) | |
2390 | indx = asym_ptr->section->output_section->index; | |
2391 | else | |
2392 | indx = asym_ptr->section->index; | |
2393 | if (elf_section_syms (abfd)[indx]) | |
2394 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
2395 | } | |
2396 | ||
d24928c0 KR |
2397 | if (asym_ptr->udata) |
2398 | idx = ((Elf_Sym_Extra *)asym_ptr->udata)->elf_sym_num; | |
2399 | else | |
32090b8e | 2400 | { |
32090b8e KR |
2401 | abort (); |
2402 | } | |
244ffee7 | 2403 | |
32090b8e | 2404 | #if DEBUG & 4 |
244ffee7 | 2405 | { |
244ffee7 | 2406 | |
32090b8e | 2407 | fprintf (stderr, |
d24928c0 KR |
2408 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
2409 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); | |
32090b8e KR |
2410 | fflush (stderr); |
2411 | } | |
2412 | #endif | |
2413 | ||
2414 | return idx; | |
2415 | } | |
2416 | ||
2417 | static boolean | |
2418 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), | |
2419 | bfd * abfd AND | |
2420 | asymbol ** symptrs) /* Buffer for generated bfd symbols */ | |
2421 | { | |
2422 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; | |
2423 | int symcount; /* Number of external ELF symbols */ | |
2424 | int i; | |
2425 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
2426 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2427 | Elf_Internal_Sym i_sym; | |
2428 | Elf_External_Sym *x_symp; | |
2429 | ||
2430 | /* this is only valid because there is only one symtab... */ | |
2431 | /* FIXME: This is incorrect, there may also be a dynamic symbol | |
2432 | table which is a subset of the full symbol table. We either need | |
2433 | to be prepared to read both (and merge them) or ensure that we | |
2434 | only read the full symbol table. Currently we only get called to | |
2435 | read the full symbol table. -fnf */ | |
2436 | if (bfd_get_outsymbols (abfd) != NULL) | |
244ffee7 | 2437 | { |
32090b8e | 2438 | return true; |
244ffee7 | 2439 | } |
244ffee7 | 2440 | |
32090b8e KR |
2441 | /* Read each raw ELF symbol, converting from external ELF form to |
2442 | internal ELF form, and then using the information to create a | |
2443 | canonical bfd symbol table entry. | |
244ffee7 | 2444 | |
32090b8e KR |
2445 | Note that we allocate the initial bfd canonical symbol buffer |
2446 | based on a one-to-one mapping of the ELF symbols to canonical | |
2447 | symbols. We actually use all the ELF symbols, so there will be no | |
2448 | space left over at the end. When we have all the symbols, we | |
2449 | build the caller's pointer vector. */ | |
244ffee7 | 2450 | |
32090b8e KR |
2451 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
2452 | { | |
2453 | bfd_error = system_call_error; | |
2454 | return false; | |
2455 | } | |
244ffee7 | 2456 | |
32090b8e KR |
2457 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2458 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); | |
2459 | sym = symbase; | |
244ffee7 | 2460 | |
32090b8e KR |
2461 | /* Temporarily allocate room for the raw ELF symbols. */ |
2462 | x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym)); | |
244ffee7 | 2463 | |
32090b8e KR |
2464 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
2465 | != symcount * sizeof (Elf_External_Sym)) | |
244ffee7 | 2466 | { |
32090b8e KR |
2467 | free ((PTR) x_symp); |
2468 | bfd_error = system_call_error; | |
2469 | return false; | |
244ffee7 | 2470 | } |
32090b8e KR |
2471 | /* Skip first symbol, which is a null dummy. */ |
2472 | for (i = 1; i < symcount; i++) | |
244ffee7 | 2473 | { |
32090b8e KR |
2474 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2475 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
e621c5cc | 2476 | #ifdef ELF_KEEP_EXTSYM |
32090b8e | 2477 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); |
e621c5cc | 2478 | #endif |
32090b8e | 2479 | sym->symbol.the_bfd = abfd; |
244ffee7 | 2480 | |
32090b8e KR |
2481 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2482 | i_sym.st_name); | |
244ffee7 | 2483 | |
32090b8e | 2484 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2485 | |
32090b8e KR |
2486 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
2487 | { | |
2488 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); | |
2489 | } | |
2490 | else if (i_sym.st_shndx == SHN_ABS) | |
2491 | { | |
2492 | sym->symbol.section = &bfd_abs_section; | |
2493 | } | |
2494 | else if (i_sym.st_shndx == SHN_COMMON) | |
2495 | { | |
2496 | sym->symbol.section = &bfd_com_section; | |
2497 | /* Elf puts the alignment into the `value' field, and the size | |
2498 | into the `size' field. BFD wants to see the size in the | |
2499 | value field, and doesn't care (at the moment) about the | |
2500 | alignment. */ | |
2501 | sym->symbol.value = i_sym.st_size; | |
2502 | } | |
2503 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2504 | { | |
2505 | sym->symbol.section = &bfd_und_section; | |
2506 | } | |
2507 | else | |
2508 | sym->symbol.section = &bfd_abs_section; | |
244ffee7 | 2509 | |
32090b8e | 2510 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2511 | |
32090b8e | 2512 | switch (ELF_ST_BIND (i_sym.st_info)) |
244ffee7 | 2513 | { |
32090b8e KR |
2514 | case STB_LOCAL: |
2515 | sym->symbol.flags |= BSF_LOCAL; | |
2516 | break; | |
2517 | case STB_GLOBAL: | |
d24928c0 | 2518 | sym->symbol.flags |= BSF_GLOBAL; |
32090b8e KR |
2519 | break; |
2520 | case STB_WEAK: | |
2521 | sym->symbol.flags |= BSF_WEAK; | |
2522 | break; | |
2523 | } | |
244ffee7 | 2524 | |
32090b8e KR |
2525 | switch (ELF_ST_TYPE (i_sym.st_info)) |
2526 | { | |
2527 | case STT_SECTION: | |
2528 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2529 | break; | |
2530 | case STT_FILE: | |
2531 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2532 | break; | |
2533 | case STT_FUNC: | |
2534 | sym->symbol.flags |= BSF_FUNCTION; | |
2535 | break; | |
244ffee7 | 2536 | } |
300adb31 | 2537 | |
e621c5cc ILT |
2538 | /* Do some backend-specific processing on this symbol. */ |
2539 | { | |
2540 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2541 | if (ebd->elf_backend_symbol_processing) | |
2542 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2543 | } | |
244ffee7 | 2544 | |
32090b8e | 2545 | sym++; |
244ffee7 JK |
2546 | } |
2547 | ||
e621c5cc ILT |
2548 | /* Do some backend-specific processing on this symbol table. */ |
2549 | { | |
2550 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2551 | if (ebd->elf_backend_symbol_table_processing) | |
2552 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2553 | } | |
244ffee7 | 2554 | |
e621c5cc | 2555 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2556 | |
32090b8e KR |
2557 | bfd_get_symcount (abfd) = symcount = sym - symbase; |
2558 | ||
2559 | /* Fill in the user's symbol pointer vector if needed. */ | |
2560 | if (symptrs) | |
244ffee7 | 2561 | { |
32090b8e KR |
2562 | sym = symbase; |
2563 | while (symcount-- > 0) | |
244ffee7 | 2564 | { |
32090b8e KR |
2565 | *symptrs++ = &sym->symbol; |
2566 | sym++; | |
244ffee7 | 2567 | } |
32090b8e | 2568 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2569 | } |
2570 | ||
2571 | return true; | |
2572 | } | |
2573 | ||
32090b8e | 2574 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2575 | |
32090b8e KR |
2576 | Note that we base it on the count plus 1, since we will null terminate |
2577 | the vector allocated based on this size. However, the ELF symbol table | |
2578 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2579 | |
32090b8e KR |
2580 | unsigned int |
2581 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd) | |
244ffee7 | 2582 | { |
32090b8e KR |
2583 | unsigned int symcount; |
2584 | unsigned int symtab_size = 0; | |
244ffee7 | 2585 | |
32090b8e KR |
2586 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
2587 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2588 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); | |
244ffee7 | 2589 | |
32090b8e KR |
2590 | return symtab_size; |
2591 | } | |
244ffee7 | 2592 | |
32090b8e KR |
2593 | /* |
2594 | This function return the number of bytes required to store the | |
2595 | relocation information associated with section <<sect>> | |
2596 | attached to bfd <<abfd>> | |
244ffee7 | 2597 | |
32090b8e KR |
2598 | */ |
2599 | unsigned int | |
2600 | elf_get_reloc_upper_bound (abfd, asect) | |
2601 | bfd *abfd; | |
2602 | sec_ptr asect; | |
2603 | { | |
2604 | if (asect->flags & SEC_RELOC) | |
2605 | { | |
2606 | /* either rel or rela */ | |
2607 | return elf_section_data(asect)->rel_hdr.sh_size; | |
2608 | } | |
2609 | else | |
2610 | return 0; | |
244ffee7 JK |
2611 | } |
2612 | ||
32090b8e KR |
2613 | static boolean |
2614 | DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols), | |
244ffee7 | 2615 | bfd * abfd AND |
32090b8e KR |
2616 | sec_ptr asect AND |
2617 | asymbol ** symbols) | |
244ffee7 | 2618 | { |
32090b8e KR |
2619 | Elf_External_Rela *native_relocs; |
2620 | arelent *reloc_cache; | |
2621 | arelent *cache_ptr; | |
244ffee7 | 2622 | |
32090b8e | 2623 | unsigned int idx; |
244ffee7 | 2624 | |
32090b8e KR |
2625 | if (asect->relocation) |
2626 | return true; | |
2627 | if (asect->reloc_count == 0) | |
2628 | return true; | |
2629 | if (asect->flags & SEC_CONSTRUCTOR) | |
2630 | return true; | |
244ffee7 | 2631 | |
32090b8e KR |
2632 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2633 | native_relocs = (Elf_External_Rela *) | |
2634 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
2635 | bfd_read ((PTR) native_relocs, | |
2636 | sizeof (Elf_External_Rela), asect->reloc_count, abfd); | |
244ffee7 | 2637 | |
32090b8e KR |
2638 | reloc_cache = (arelent *) |
2639 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2640 | ||
2641 | if (!reloc_cache) | |
6a3eb9b6 | 2642 | { |
32090b8e KR |
2643 | bfd_error = no_memory; |
2644 | return false; | |
6a3eb9b6 | 2645 | } |
244ffee7 | 2646 | |
32090b8e KR |
2647 | for (idx = 0; idx < asect->reloc_count; idx++) |
2648 | { | |
32090b8e KR |
2649 | Elf_Internal_Rela dst; |
2650 | Elf_External_Rela *src; | |
244ffee7 | 2651 | |
32090b8e KR |
2652 | cache_ptr = reloc_cache + idx; |
2653 | src = native_relocs + idx; | |
2654 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2655 | |
d24928c0 | 2656 | #ifdef RELOC_PROCESSING |
32090b8e KR |
2657 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2658 | #else | |
32090b8e KR |
2659 | if (asect->flags & SEC_RELOC) |
2660 | { | |
2661 | /* relocatable, so the offset is off of the section */ | |
2662 | cache_ptr->address = dst.r_offset + asect->vma; | |
2663 | } | |
2664 | else | |
2665 | { | |
2666 | /* non-relocatable, so the offset a virtual address */ | |
2667 | cache_ptr->address = dst.r_offset; | |
2668 | } | |
2669 | /* ELF_R_SYM(dst.r_info) is the symbol table offset; subtract 1 | |
2670 | because the first entry is NULL. */ | |
2671 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2672 | { | |
2673 | /* Is it an ELF section symbol? If so, translate it into a | |
2674 | BFD section symbol. */ | |
2675 | asymbol *s = *(cache_ptr->sym_ptr_ptr); | |
2676 | if (s->flags & BSF_SECTION_SYM) | |
d24928c0 KR |
2677 | { |
2678 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2679 | s = *cache_ptr->sym_ptr_ptr; | |
2680 | if (s->name == 0 || s->name[0] == 0) | |
2681 | abort (); | |
2682 | } | |
32090b8e KR |
2683 | } |
2684 | cache_ptr->addend = dst.r_addend; | |
244ffee7 | 2685 | |
32090b8e KR |
2686 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2687 | { | |
2688 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2689 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2690 | } | |
2691 | #endif | |
2692 | } | |
244ffee7 | 2693 | |
32090b8e KR |
2694 | asect->relocation = reloc_cache; |
2695 | return true; | |
2696 | } | |
238ac6ec | 2697 | |
32090b8e KR |
2698 | #ifdef DEBUG |
2699 | static void | |
2700 | elf_debug_section (str, num, hdr) | |
2701 | char *str; | |
2702 | int num; | |
2703 | Elf_Internal_Shdr *hdr; | |
2704 | { | |
2705 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
2706 | fprintf (stderr, | |
2707 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
2708 | (long) hdr->sh_name, | |
2709 | (long) hdr->sh_type, | |
2710 | (long) hdr->sh_flags); | |
2711 | fprintf (stderr, | |
2712 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
2713 | (long) hdr->sh_addr, | |
2714 | (long) hdr->sh_offset, | |
2715 | (long) hdr->sh_size); | |
2716 | fprintf (stderr, | |
2717 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
2718 | (long) hdr->sh_link, | |
2719 | (long) hdr->sh_info, | |
2720 | (long) hdr->sh_addralign); | |
2721 | fprintf (stderr, "sh_entsize = %ld\n", | |
2722 | (long) hdr->sh_entsize); | |
2723 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
2724 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
2725 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
2726 | fflush (stderr); | |
2727 | } | |
244ffee7 | 2728 | |
32090b8e KR |
2729 | static void |
2730 | elf_debug_file (ehdrp) | |
2731 | Elf_Internal_Ehdr *ehdrp; | |
2732 | { | |
2733 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
2734 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
2735 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
2736 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
2737 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
2738 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
2739 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 2740 | } |
32090b8e | 2741 | #endif |
244ffee7 JK |
2742 | |
2743 | static boolean | |
32090b8e | 2744 | DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols), |
244ffee7 | 2745 | bfd * abfd AND |
32090b8e KR |
2746 | sec_ptr asect AND |
2747 | asymbol ** symbols) | |
244ffee7 | 2748 | { |
32090b8e KR |
2749 | Elf_External_Rel *native_relocs; |
2750 | arelent *reloc_cache; | |
2751 | arelent *cache_ptr; | |
2752 | Elf_Internal_Shdr *data_hdr; | |
2753 | ElfNAME (Off) data_off; | |
2754 | ElfNAME (Word) data_max; | |
2755 | char buf[4]; /* FIXME -- might be elf64 */ | |
244ffee7 | 2756 | |
32090b8e | 2757 | unsigned int idx; |
244ffee7 | 2758 | |
32090b8e KR |
2759 | if (asect->relocation) |
2760 | return true; | |
2761 | if (asect->reloc_count == 0) | |
2762 | return true; | |
2763 | if (asect->flags & SEC_CONSTRUCTOR) | |
2764 | return true; | |
244ffee7 | 2765 | |
32090b8e KR |
2766 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2767 | native_relocs = (Elf_External_Rel *) | |
2768 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
2769 | bfd_read ((PTR) native_relocs, | |
2770 | sizeof (Elf_External_Rel), asect->reloc_count, abfd); | |
244ffee7 | 2771 | |
32090b8e KR |
2772 | reloc_cache = (arelent *) |
2773 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2774 | ||
2775 | if (!reloc_cache) | |
244ffee7 | 2776 | { |
32090b8e | 2777 | bfd_error = no_memory; |
244ffee7 JK |
2778 | return false; |
2779 | } | |
2780 | ||
32090b8e KR |
2781 | /* Get the offset of the start of the segment we are relocating to read in |
2782 | the implicit addend. */ | |
2783 | data_hdr = &elf_section_data(asect)->this_hdr; | |
2784 | data_off = data_hdr->sh_offset; | |
2785 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 2786 | |
32090b8e KR |
2787 | #if DEBUG & 2 |
2788 | elf_debug_section ("data section", -1, data_hdr); | |
2789 | #endif | |
244ffee7 | 2790 | |
32090b8e | 2791 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 2792 | { |
32090b8e KR |
2793 | #ifdef RELOC_PROCESSING |
2794 | Elf_Internal_Rel dst; | |
2795 | Elf_External_Rel *src; | |
244ffee7 | 2796 | |
32090b8e KR |
2797 | cache_ptr = reloc_cache + idx; |
2798 | src = native_relocs + idx; | |
2799 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 2800 | |
32090b8e KR |
2801 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2802 | #else | |
2803 | Elf_Internal_Rel dst; | |
2804 | Elf_External_Rel *src; | |
6a3eb9b6 | 2805 | |
32090b8e KR |
2806 | cache_ptr = reloc_cache + idx; |
2807 | src = native_relocs + idx; | |
2808 | ||
2809 | elf_swap_reloc_in (abfd, src, &dst); | |
2810 | ||
2811 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 2812 | { |
32090b8e KR |
2813 | /* relocatable, so the offset is off of the section */ |
2814 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 2815 | } |
32090b8e | 2816 | else |
244ffee7 | 2817 | { |
32090b8e KR |
2818 | /* non-relocatable, so the offset a virtual address */ |
2819 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 2820 | } |
32090b8e | 2821 | /* ELF_R_SYM(dst.r_info) is the symbol table offset... |
d24928c0 | 2822 | -1 is to skip the dummy symbol table entry */ |
32090b8e | 2823 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; |
d24928c0 KR |
2824 | { |
2825 | /* Is it an ELF section symbol? If so, translate it into a | |
2826 | BFD section symbol. */ | |
2827 | asymbol *s = *(cache_ptr->sym_ptr_ptr); | |
2828 | if (s->flags & BSF_SECTION_SYM) | |
2829 | { | |
2830 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2831 | s = *cache_ptr->sym_ptr_ptr; | |
2832 | if (s->name == 0 || s->name[0] == 0) | |
2833 | abort (); | |
2834 | } | |
2835 | } | |
32090b8e | 2836 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 2837 | cache_ptr->addend = 0; |
244ffee7 | 2838 | |
32090b8e KR |
2839 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2840 | { | |
2841 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2842 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
2843 | } | |
2844 | #endif | |
2845 | } | |
244ffee7 | 2846 | |
32090b8e KR |
2847 | asect->relocation = reloc_cache; |
2848 | return true; | |
2849 | } | |
244ffee7 | 2850 | |
32090b8e KR |
2851 | unsigned int |
2852 | elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
2853 | bfd *abfd; | |
2854 | sec_ptr section; | |
2855 | arelent **relptr; | |
2856 | asymbol **symbols; | |
2857 | { | |
2858 | arelent *tblptr = section->relocation; | |
2859 | unsigned int count = 0; | |
2860 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
2861 | ||
2862 | /* snarfed from coffcode.h */ | |
2863 | if (use_rela_p) | |
2864 | elf_slurp_reloca_table (abfd, section, symbols); | |
2865 | else | |
2866 | elf_slurp_reloc_table (abfd, section, symbols); | |
2867 | ||
2868 | tblptr = section->relocation; | |
2869 | if (!tblptr) | |
2870 | return 0; | |
2871 | ||
2872 | for (; count++ < section->reloc_count;) | |
2873 | *relptr++ = tblptr++; | |
2874 | ||
2875 | *relptr = 0; | |
2876 | return section->reloc_count; | |
2877 | } | |
2878 | ||
2879 | unsigned int | |
2880 | DEFUN (elf_get_symtab, (abfd, alocation), | |
2881 | bfd * abfd AND | |
2882 | asymbol ** alocation) | |
2883 | { | |
2884 | ||
2885 | if (!elf_slurp_symbol_table (abfd, alocation)) | |
2886 | return 0; | |
2887 | else | |
2888 | return bfd_get_symcount (abfd); | |
2889 | } | |
2890 | ||
2891 | asymbol * | |
2892 | DEFUN (elf_make_empty_symbol, (abfd), | |
2893 | bfd * abfd) | |
2894 | { | |
2895 | elf_symbol_type *newsym; | |
2896 | ||
2897 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
2898 | if (!newsym) | |
2899 | { | |
2900 | bfd_error = no_memory; | |
2901 | return NULL; | |
2902 | } | |
2903 | else | |
2904 | { | |
2905 | newsym->symbol.the_bfd = abfd; | |
2906 | return &newsym->symbol; | |
244ffee7 | 2907 | } |
32090b8e | 2908 | } |
244ffee7 | 2909 | |
32090b8e KR |
2910 | void |
2911 | DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret), | |
2912 | bfd * ignore_abfd AND | |
2913 | asymbol * symbol AND | |
2914 | symbol_info * ret) | |
2915 | { | |
2916 | bfd_symbol_info (symbol, ret); | |
2917 | } | |
244ffee7 | 2918 | |
32090b8e KR |
2919 | void |
2920 | DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how), | |
2921 | bfd * ignore_abfd AND | |
2922 | PTR filep AND | |
2923 | asymbol * symbol AND | |
2924 | bfd_print_symbol_type how) | |
2925 | { | |
2926 | FILE *file = (FILE *) filep; | |
2927 | switch (how) | |
2928 | { | |
2929 | case bfd_print_symbol_name: | |
2930 | fprintf (file, "%s", symbol->name); | |
2931 | break; | |
2932 | case bfd_print_symbol_more: | |
2933 | fprintf (file, "elf "); | |
2934 | fprintf_vma (file, symbol->value); | |
2935 | fprintf (file, " %lx", (long) symbol->flags); | |
2936 | break; | |
2937 | case bfd_print_symbol_all: | |
2938 | { | |
2939 | CONST char *section_name; | |
2940 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
2941 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
2942 | fprintf (file, " %s\t%s", | |
2943 | section_name, | |
2944 | symbol->name); | |
2945 | } | |
2946 | break; | |
2947 | } | |
244ffee7 | 2948 | |
32090b8e | 2949 | } |
244ffee7 | 2950 | |
32090b8e KR |
2951 | alent * |
2952 | DEFUN (elf_get_lineno, (ignore_abfd, symbol), | |
2953 | bfd * ignore_abfd AND | |
2954 | asymbol * symbol) | |
2955 | { | |
2956 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
2957 | fflush (stderr); | |
2958 | BFD_FAIL (); | |
2959 | return NULL; | |
2960 | } | |
2961 | ||
2962 | boolean | |
2963 | DEFUN (elf_set_arch_mach, (abfd, arch, machine), | |
2964 | bfd * abfd AND | |
2965 | enum bfd_architecture arch AND | |
2966 | unsigned long machine) | |
2967 | { | |
2968 | /* Allow any architecture to be supported by the elf backend */ | |
2969 | switch (arch) | |
244ffee7 | 2970 | { |
32090b8e KR |
2971 | case bfd_arch_unknown: /* EM_NONE */ |
2972 | case bfd_arch_sparc: /* EM_SPARC */ | |
2973 | case bfd_arch_i386: /* EM_386 */ | |
2974 | case bfd_arch_m68k: /* EM_68K */ | |
2975 | case bfd_arch_m88k: /* EM_88K */ | |
2976 | case bfd_arch_i860: /* EM_860 */ | |
2977 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ | |
2978 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ | |
2979 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
2980 | default: | |
2981 | return false; | |
244ffee7 | 2982 | } |
32090b8e | 2983 | } |
244ffee7 | 2984 | |
32090b8e KR |
2985 | boolean |
2986 | DEFUN (elf_find_nearest_line, (abfd, | |
2987 | section, | |
2988 | symbols, | |
2989 | offset, | |
2990 | filename_ptr, | |
2991 | functionname_ptr, | |
2992 | line_ptr), | |
2993 | bfd * abfd AND | |
2994 | asection * section AND | |
2995 | asymbol ** symbols AND | |
2996 | bfd_vma offset AND | |
2997 | CONST char **filename_ptr AND | |
2998 | CONST char **functionname_ptr AND | |
2999 | unsigned int *line_ptr) | |
3000 | { | |
3001 | return false; | |
244ffee7 JK |
3002 | } |
3003 | ||
32090b8e KR |
3004 | int |
3005 | DEFUN (elf_sizeof_headers, (abfd, reloc), | |
3006 | bfd * abfd AND | |
3007 | boolean reloc) | |
3008 | { | |
3009 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); | |
3010 | fflush (stderr); | |
3011 | BFD_FAIL (); | |
3012 | return 0; | |
3013 | } | |
244ffee7 | 3014 | |
32090b8e KR |
3015 | boolean |
3016 | DEFUN (elf_set_section_contents, (abfd, section, location, offset, count), | |
3017 | bfd * abfd AND | |
3018 | sec_ptr section AND | |
3019 | PTR location AND | |
3020 | file_ptr offset AND | |
3021 | bfd_size_type count) | |
244ffee7 | 3022 | { |
244ffee7 JK |
3023 | Elf_Internal_Shdr *hdr; |
3024 | ||
32090b8e | 3025 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
244ffee7 | 3026 | { |
32090b8e KR |
3027 | /* do setup calculations (FIXME) */ |
3028 | prep_headers (abfd); | |
3029 | elf_compute_section_file_positions (abfd); | |
3030 | abfd->output_has_begun = true; | |
244ffee7 | 3031 | } |
244ffee7 | 3032 | |
32090b8e | 3033 | hdr = &elf_section_data(section)->this_hdr; |
244ffee7 | 3034 | |
32090b8e KR |
3035 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3036 | return false; | |
3037 | if (bfd_write (location, 1, count, abfd) != count) | |
3038 | return false; | |
3039 | ||
3040 | return true; | |
3041 | } | |
3042 | ||
3043 | void | |
3044 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), | |
3045 | bfd * abfd AND | |
3046 | arelent * cache_ptr AND | |
3047 | Elf_Internal_Rela * dst) | |
244ffee7 | 3048 | { |
32090b8e KR |
3049 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3050 | fflush (stderr); | |
3051 | BFD_FAIL (); | |
244ffee7 JK |
3052 | } |
3053 | ||
32090b8e KR |
3054 | void |
3055 | DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst), | |
244ffee7 | 3056 | bfd * abfd AND |
32090b8e KR |
3057 | arelent * cache_ptr AND |
3058 | Elf_Internal_Rel * dst) | |
244ffee7 | 3059 | { |
32090b8e KR |
3060 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3061 | fflush (stderr); | |
3062 | BFD_FAIL (); | |
3063 | } | |
244ffee7 | 3064 | |
32090b8e KR |
3065 | \f |
3066 | /* Core file support */ | |
244ffee7 | 3067 | |
32090b8e KR |
3068 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3069 | #include <sys/procfs.h> | |
3070 | #else | |
3071 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ | |
3072 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ | |
3073 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ | |
3074 | #endif | |
244ffee7 | 3075 | |
32090b8e | 3076 | #ifdef HAVE_PROCFS |
244ffee7 | 3077 | |
32090b8e KR |
3078 | static void |
3079 | DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos), | |
3080 | bfd * abfd AND | |
3081 | char *descdata AND | |
3082 | int descsz AND | |
3083 | long filepos) | |
3084 | { | |
3085 | asection *newsect; | |
3086 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3087 | |
32090b8e | 3088 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3089 | { |
32090b8e KR |
3090 | newsect = bfd_make_section (abfd, ".reg"); |
3091 | newsect->_raw_size = sizeof (status->pr_reg); | |
3092 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3093 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3094 | newsect->alignment_power = 2; | |
3095 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3096 | { | |
3097 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3098 | } | |
244ffee7 | 3099 | } |
32090b8e | 3100 | } |
244ffee7 | 3101 | |
32090b8e | 3102 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3103 | |
32090b8e KR |
3104 | static void |
3105 | DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos), | |
3106 | bfd * abfd AND | |
3107 | char *descdata AND | |
3108 | int descsz AND | |
3109 | long filepos) | |
3110 | { | |
3111 | asection *newsect; | |
244ffee7 | 3112 | |
32090b8e KR |
3113 | if (descsz == sizeof (prpsinfo_t)) |
3114 | { | |
3115 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
244ffee7 | 3116 | { |
32090b8e | 3117 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3118 | } |
244ffee7 | 3119 | } |
244ffee7 JK |
3120 | } |
3121 | ||
244ffee7 | 3122 | static void |
32090b8e KR |
3123 | DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos), |
3124 | bfd * abfd AND | |
3125 | char *descdata AND | |
3126 | int descsz AND | |
3127 | long filepos) | |
244ffee7 | 3128 | { |
32090b8e | 3129 | asection *newsect; |
244ffee7 | 3130 | |
32090b8e KR |
3131 | newsect = bfd_make_section (abfd, ".reg2"); |
3132 | newsect->_raw_size = descsz; | |
3133 | newsect->filepos = filepos; | |
3134 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3135 | newsect->alignment_power = 2; | |
6a3eb9b6 | 3136 | } |
244ffee7 | 3137 | |
32090b8e KR |
3138 | #endif /* HAVE_PROCFS */ |
3139 | ||
3140 | /* Return a pointer to the args (including the command name) that were | |
3141 | seen by the program that generated the core dump. Note that for | |
3142 | some reason, a spurious space is tacked onto the end of the args | |
3143 | in some (at least one anyway) implementations, so strip it off if | |
3144 | it exists. */ | |
3145 | ||
3146 | char * | |
3147 | DEFUN (elf_core_file_failing_command, (abfd), | |
3148 | bfd * abfd) | |
244ffee7 | 3149 | { |
32090b8e KR |
3150 | #ifdef HAVE_PROCFS |
3151 | if (core_prpsinfo (abfd)) | |
3152 | { | |
3153 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3154 | char *scan = p->pr_psargs; | |
3155 | while (*scan++) | |
3156 | {; | |
3157 | } | |
3158 | scan -= 2; | |
3159 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3160 | { | |
3161 | *scan = '\000'; | |
3162 | } | |
3163 | return p->pr_psargs; | |
3164 | } | |
3165 | #endif | |
3166 | return NULL; | |
3167 | } | |
244ffee7 | 3168 | |
32090b8e KR |
3169 | /* Return the number of the signal that caused the core dump. Presumably, |
3170 | since we have a core file, we got a signal of some kind, so don't bother | |
3171 | checking the other process status fields, just return the signal number. | |
3172 | */ | |
244ffee7 | 3173 | |
32090b8e KR |
3174 | int |
3175 | DEFUN (elf_core_file_failing_signal, (abfd), | |
3176 | bfd * abfd) | |
3177 | { | |
3178 | #ifdef HAVE_PROCFS | |
3179 | if (core_prstatus (abfd)) | |
3180 | { | |
3181 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3182 | } | |
3183 | #endif | |
3184 | return -1; | |
3185 | } | |
244ffee7 | 3186 | |
32090b8e KR |
3187 | /* Check to see if the core file could reasonably be expected to have |
3188 | come for the current executable file. Note that by default we return | |
3189 | true unless we find something that indicates that there might be a | |
3190 | problem. | |
3191 | */ | |
244ffee7 | 3192 | |
32090b8e KR |
3193 | boolean |
3194 | DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd), | |
3195 | bfd * core_bfd AND | |
3196 | bfd * exec_bfd) | |
3197 | { | |
3198 | #ifdef HAVE_PROCFS | |
3199 | char *corename; | |
3200 | char *execname; | |
3201 | #endif | |
244ffee7 | 3202 | |
32090b8e KR |
3203 | /* First, xvecs must match since both are ELF files for the same target. */ |
3204 | ||
3205 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3206 | { |
32090b8e | 3207 | bfd_error = system_call_error; |
244ffee7 JK |
3208 | return false; |
3209 | } | |
3210 | ||
32090b8e | 3211 | #ifdef HAVE_PROCFS |
244ffee7 | 3212 | |
32090b8e KR |
3213 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3214 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3215 | |
32090b8e | 3216 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3217 | { |
32090b8e KR |
3218 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3219 | } | |
3220 | else | |
3221 | { | |
3222 | return true; | |
3223 | } | |
244ffee7 | 3224 | |
32090b8e | 3225 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3226 | |
32090b8e KR |
3227 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3228 | { | |
3229 | execname++; | |
3230 | } | |
3231 | else | |
3232 | { | |
3233 | execname = (char *) exec_bfd->filename; | |
3234 | } | |
244ffee7 | 3235 | |
32090b8e | 3236 | /* See if they match */ |
244ffee7 | 3237 | |
32090b8e | 3238 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3239 | |
32090b8e | 3240 | #else |
244ffee7 | 3241 | |
244ffee7 | 3242 | return true; |
244ffee7 | 3243 | |
32090b8e KR |
3244 | #endif /* HAVE_PROCFS */ |
3245 | } | |
244ffee7 | 3246 | |
32090b8e KR |
3247 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3248 | the information that would normally be available from the /proc interface | |
3249 | for the process, at the time the process dumped core. Currently this | |
3250 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3251 | |
32090b8e KR |
3252 | Since these structures are potentially machine dependent in size and |
3253 | ordering, bfd provides two levels of support for them. The first level, | |
3254 | available on all machines since it does not require that the host | |
3255 | have /proc support or the relevant include files, is to create a bfd | |
3256 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3257 | without any interpretation of their contents. With just this support, | |
3258 | the bfd client will have to interpret the structures itself. Even with | |
3259 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3260 | |
32090b8e KR |
3261 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3262 | pick apart the structures to gather some additional information that | |
3263 | clients may want, such as the general register set, the name of the | |
3264 | exec'ed file and its arguments, the signal (if any) that caused the | |
3265 | core dump, etc. | |
244ffee7 | 3266 | |
32090b8e | 3267 | */ |
244ffee7 | 3268 | |
32090b8e KR |
3269 | static boolean |
3270 | DEFUN (elf_corefile_note, (abfd, hdr), | |
244ffee7 | 3271 | bfd * abfd AND |
32090b8e | 3272 | Elf_Internal_Phdr * hdr) |
244ffee7 | 3273 | { |
32090b8e KR |
3274 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3275 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3276 | char *buf = NULL; /* Entire note segment contents */ | |
3277 | char *namedata; /* Name portion of the note */ | |
3278 | char *descdata; /* Descriptor portion of the note */ | |
3279 | char *sectname; /* Name to use for new section */ | |
3280 | long filepos; /* File offset to descriptor data */ | |
3281 | asection *newsect; | |
3282 | ||
3283 | if (hdr->p_filesz > 0 | |
3284 | && (buf = (char *) bfd_xmalloc (hdr->p_filesz)) != NULL | |
3285 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 | |
3286 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3287 | { | |
3288 | x_note_p = (Elf_External_Note *) buf; | |
3289 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3290 | { | |
3291 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3292 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3293 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3294 | namedata = x_note_p->name; | |
3295 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3296 | filepos = hdr->p_offset + (descdata - buf); | |
3297 | switch (i_note.type) | |
3298 | { | |
3299 | case NT_PRSTATUS: | |
3300 | /* process descdata as prstatus info */ | |
3301 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); | |
3302 | sectname = ".prstatus"; | |
3303 | break; | |
3304 | case NT_FPREGSET: | |
3305 | /* process descdata as fpregset info */ | |
3306 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); | |
3307 | sectname = ".fpregset"; | |
3308 | break; | |
3309 | case NT_PRPSINFO: | |
3310 | /* process descdata as prpsinfo */ | |
3311 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); | |
3312 | sectname = ".prpsinfo"; | |
3313 | break; | |
3314 | default: | |
3315 | /* Unknown descriptor, just ignore it. */ | |
3316 | sectname = NULL; | |
3317 | break; | |
3318 | } | |
3319 | if (sectname != NULL) | |
3320 | { | |
3321 | newsect = bfd_make_section (abfd, sectname); | |
3322 | newsect->_raw_size = i_note.descsz; | |
3323 | newsect->filepos = filepos; | |
3324 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3325 | newsect->alignment_power = 2; | |
3326 | } | |
3327 | x_note_p = (Elf_External_Note *) | |
3328 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3329 | } | |
3330 | } | |
3331 | if (buf != NULL) | |
3332 | { | |
3333 | free (buf); | |
3334 | } | |
3335 | return true; | |
244ffee7 | 3336 | |
244ffee7 JK |
3337 | } |
3338 | ||
32090b8e KR |
3339 | /* Core files are simply standard ELF formatted files that partition |
3340 | the file using the execution view of the file (program header table) | |
3341 | rather than the linking view. In fact, there is no section header | |
3342 | table in a core file. | |
3343 | ||
3344 | The process status information (including the contents of the general | |
3345 | register set) and the floating point register set are stored in a | |
3346 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3347 | that allow standard bfd access to the general registers (.reg) and the | |
3348 | floating point registers (.reg2). | |
3349 | ||
3350 | */ | |
3351 | ||
3352 | bfd_target * | |
3353 | DEFUN (elf_core_file_p, (abfd), bfd * abfd) | |
244ffee7 | 3354 | { |
32090b8e KR |
3355 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3356 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3357 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3358 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3359 | unsigned int phindex; | |
244ffee7 | 3360 | |
32090b8e KR |
3361 | /* Read in the ELF header in external format. */ |
3362 | ||
3363 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3364 | { |
32090b8e | 3365 | bfd_error = system_call_error; |
244ffee7 JK |
3366 | return NULL; |
3367 | } | |
32090b8e KR |
3368 | |
3369 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3370 | make use of. The magic number must match, the address size ('class') | |
3371 | and byte-swapping must match our XVEC entry, and it must have a | |
3372 | program header table (FIXME: See comments re segments at top of this | |
3373 | file). */ | |
3374 | ||
3375 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3376 | { |
32090b8e KR |
3377 | wrong: |
3378 | bfd_error = wrong_format; | |
3379 | return NULL; | |
244ffee7 | 3380 | } |
244ffee7 | 3381 | |
32090b8e | 3382 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3383 | |
32090b8e KR |
3384 | { |
3385 | #if ARCH_SIZE == 32 | |
3386 | int desired_address_size = ELFCLASS32; | |
3387 | #endif | |
3388 | #if ARCH_SIZE == 64 | |
3389 | int desired_address_size = ELFCLASS64; | |
3390 | #endif | |
3391 | ||
3392 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3393 | goto wrong; | |
3394 | } | |
3395 | ||
3396 | /* Switch xvec to match the specified byte order. */ | |
3397 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3398 | { |
32090b8e KR |
3399 | case ELFDATA2MSB: /* Big-endian */ |
3400 | if (abfd->xvec->byteorder_big_p == false) | |
3401 | goto wrong; | |
244ffee7 | 3402 | break; |
32090b8e KR |
3403 | case ELFDATA2LSB: /* Little-endian */ |
3404 | if (abfd->xvec->byteorder_big_p == true) | |
3405 | goto wrong; | |
244ffee7 | 3406 | break; |
32090b8e KR |
3407 | case ELFDATANONE: /* No data encoding specified */ |
3408 | default: /* Unknown data encoding specified */ | |
3409 | goto wrong; | |
244ffee7 JK |
3410 | } |
3411 | ||
32090b8e KR |
3412 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3413 | the tdata pointer in the bfd. */ | |
244ffee7 | 3414 | |
32090b8e KR |
3415 | elf_tdata (abfd) = |
3416 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3417 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3418 | { |
32090b8e KR |
3419 | bfd_error = no_memory; |
3420 | return NULL; | |
244ffee7 | 3421 | } |
244ffee7 | 3422 | |
32090b8e | 3423 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3424 | |
32090b8e KR |
3425 | /* Now that we know the byte order, swap in the rest of the header */ |
3426 | i_ehdrp = elf_elfheader (abfd); | |
3427 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3428 | #if DEBUG & 1 | |
3429 | elf_debug_file (i_ehdrp); | |
3430 | #endif | |
244ffee7 | 3431 | |
32090b8e KR |
3432 | /* If there is no program header, or the type is not a core file, then |
3433 | we are hosed. */ | |
3434 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3435 | goto wrong; | |
244ffee7 | 3436 | |
32090b8e KR |
3437 | /* Allocate space for a copy of the program header table in |
3438 | internal form, seek to the program header table in the file, | |
3439 | read it in, and convert it to internal form. As a simple sanity | |
3440 | check, verify that the what BFD thinks is the size of each program | |
3441 | header table entry actually matches the size recorded in the file. */ | |
3442 | ||
3443 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3444 | goto wrong; | |
3445 | i_phdrp = (Elf_Internal_Phdr *) | |
3446 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3447 | if (!i_phdrp) | |
244ffee7 | 3448 | { |
32090b8e KR |
3449 | bfd_error = no_memory; |
3450 | return NULL; | |
3451 | } | |
3452 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
3453 | { | |
3454 | bfd_error = system_call_error; | |
3455 | return NULL; | |
3456 | } | |
3457 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) | |
3458 | { | |
3459 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3460 | != sizeof (x_phdr)) | |
3461 | { | |
3462 | bfd_error = system_call_error; | |
3463 | return NULL; | |
3464 | } | |
3465 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); | |
244ffee7 JK |
3466 | } |
3467 | ||
32090b8e KR |
3468 | /* Once all of the program headers have been read and converted, we |
3469 | can start processing them. */ | |
244ffee7 | 3470 | |
32090b8e KR |
3471 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3472 | { | |
3473 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3474 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3475 | { | |
3476 | elf_corefile_note (abfd, i_phdrp + phindex); | |
3477 | } | |
3478 | } | |
244ffee7 | 3479 | |
32090b8e | 3480 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3481 | |
32090b8e | 3482 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3483 | |
32090b8e | 3484 | return abfd->xvec; |
244ffee7 | 3485 | } |