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9ce0058c SC |
1 | /* ELF support for BFD. |
2 | Copyright (C) 1991 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". | |
7 | ||
8 | This file is part of BFD, the Binary File Descriptor library. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
23 | ||
24 | ||
25 | /**************************************** | |
26 | ||
27 | WARNING | |
28 | ||
29 | This is only a partial ELF implementation, | |
30 | incorporating only those parts that are | |
31 | required to get gdb up and running. It is | |
32 | expected that it will be expanded to a full | |
33 | ELF implementation at some future date. | |
34 | ||
35 | Unimplemented stubs call abort() to ensure | |
36 | that they get proper attention if they are | |
37 | ever called. The stubs are here since | |
38 | this version was hacked from the COFF | |
39 | version, and thus they will probably | |
40 | go away or get expanded appropriately in a | |
41 | future version. | |
42 | ||
43 | fnf@cygnus.com | |
44 | ||
45 | *****************************************/ | |
46 | ||
47 | ||
48 | /* Problems and other issues to resolve. | |
49 | ||
50 | (1) BFD expects there to be some fixed number of "sections" in | |
51 | the object file. I.E. there is a "section_count" variable in the | |
52 | bfd structure which contains the number of sections. However, ELF | |
53 | supports multiple "views" of a file. In particular, with current | |
54 | implementations, executable files typically have two tables, a | |
55 | program header table and a section header table, both of which | |
56 | partition the executable. | |
57 | ||
58 | In ELF-speak, the "linking view" of the file uses the section header | |
59 | table to access "sections" within the file, and the "execution view" | |
60 | uses the program header table to access "segments" within the file. | |
61 | "Segments" typically may contain all the data from one or more | |
62 | "sections". | |
63 | ||
64 | Note that the section header table is optional in ELF executables, | |
65 | but it is this information that is most useful to gdb. If the | |
66 | section header table is missing, then gdb should probably try | |
67 | to make do with the program header table. (FIXME) | |
68 | ||
69 | */ | |
70 | ||
9ce0058c | 71 | #include "bfd.h" |
e0796d22 | 72 | #include "sysdep.h" |
9ce0058c SC |
73 | #include "libbfd.h" |
74 | #include "obstack.h" | |
c3eb25fc SC |
75 | #include "elf/common.h" |
76 | #include "elf/internal.h" | |
77 | #include "elf/external.h" | |
9ce0058c | 78 | |
8c4a1ace JG |
79 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
80 | #include <sys/procfs.h> | |
81 | #else | |
82 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ | |
83 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ | |
84 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ | |
85 | #endif | |
86 | ||
9ce0058c | 87 | /* Forward data declarations */ |
8c4a1ace | 88 | |
9ce0058c SC |
89 | extern bfd_target elf_little_vec, elf_big_vec; |
90 | ||
8c4a1ace JG |
91 | /* Currently the elf_symbol_type struct just contains the generic bfd |
92 | symbol structure. */ | |
93 | ||
94 | typedef struct | |
95 | { | |
96 | asymbol symbol; | |
97 | } elf_symbol_type; | |
98 | ||
99 | /* Some private data is stashed away for future use using the tdata pointer | |
100 | in the bfd structure. This information is different for ELF core files | |
101 | and other ELF files. */ | |
102 | ||
103 | typedef struct | |
104 | { | |
105 | void *prstatus; /* The raw /proc prstatus structure */ | |
106 | void *prpsinfo; /* The raw /proc prpsinfo structure */ | |
107 | } elf_core_tdata; | |
108 | ||
109 | #define core_prpsinfo(bfd) (((elf_core_tdata *)((bfd)->tdata))->prpsinfo) | |
110 | #define core_prstatus(bfd) (((elf_core_tdata *)((bfd)->tdata))->prstatus) | |
111 | ||
112 | typedef struct | |
113 | { | |
114 | file_ptr symtab_filepos; /* Offset to start of ELF symtab section */ | |
115 | long symtab_filesz; /* Size of ELF symtab section */ | |
116 | file_ptr strtab_filepos; /* Offset to start of ELF string tbl section */ | |
117 | long strtab_filesz; /* Size of ELF string tbl section */ | |
118 | } elf_obj_tdata; | |
119 | ||
120 | #define elf_tdata(bfd) ((elf_obj_tdata *) ((bfd) -> tdata)) | |
121 | #define elf_symtab_filepos(bfd) (elf_tdata(bfd) -> symtab_filepos) | |
122 | #define elf_symtab_filesz(bfd) (elf_tdata(bfd) -> symtab_filesz) | |
123 | #define elf_strtab_filepos(bfd) (elf_tdata(bfd) -> strtab_filepos) | |
124 | #define elf_strtab_filesz(bfd) (elf_tdata(bfd) -> strtab_filesz) | |
125 | ||
126 | /* Translate an ELF symbol in external format into an ELF symbol in internal | |
127 | format. */ | |
128 | ||
129 | static void | |
130 | DEFUN(elf_swap_symbol_in,(abfd, src, dst), | |
131 | bfd *abfd AND | |
132 | Elf_External_Sym *src AND | |
133 | Elf_Internal_Sym *dst) | |
134 | { | |
135 | dst -> st_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_name); | |
136 | dst -> st_value = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_value); | |
137 | dst -> st_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_size); | |
138 | dst -> st_info = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_info); | |
139 | dst -> st_other = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_other); | |
140 | dst -> st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> st_shndx); | |
141 | } | |
142 | ||
143 | ||
e83f3040 FF |
144 | /* Translate an ELF file header in external format into an ELF file header in |
145 | internal format. */ | |
9ce0058c SC |
146 | |
147 | static void | |
8c4a1ace | 148 | DEFUN(elf_swap_ehdr_in,(abfd, src, dst), |
9ce0058c SC |
149 | bfd *abfd AND |
150 | Elf_External_Ehdr *src AND | |
151 | Elf_Internal_Ehdr *dst) | |
152 | { | |
153 | bcopy (src -> e_ident, dst -> e_ident, EI_NIDENT); | |
154 | dst -> e_type = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_type); | |
155 | dst -> e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_machine); | |
156 | dst -> e_version = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_version); | |
157 | dst -> e_entry = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_entry); | |
158 | dst -> e_phoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_phoff); | |
159 | dst -> e_shoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_shoff); | |
160 | dst -> e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_flags); | |
161 | dst -> e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_ehsize); | |
162 | dst -> e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phentsize); | |
163 | dst -> e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phnum); | |
164 | dst -> e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shentsize); | |
165 | dst -> e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shnum); | |
166 | dst -> e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shstrndx); | |
167 | } | |
168 | ||
169 | ||
170 | /* Translate an ELF section header table entry in external format into an | |
171 | ELF section header table entry in internal format. */ | |
172 | ||
173 | static void | |
8c4a1ace | 174 | DEFUN(elf_swap_shdr_in,(abfd, src, dst), |
9ce0058c SC |
175 | bfd *abfd AND |
176 | Elf_External_Shdr *src AND | |
177 | Elf_Internal_Shdr *dst) | |
178 | { | |
179 | dst -> sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_name); | |
180 | dst -> sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_type); | |
181 | dst -> sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_flags); | |
182 | dst -> sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addr); | |
183 | dst -> sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_offset); | |
184 | dst -> sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_size); | |
185 | dst -> sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_link); | |
186 | dst -> sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_info); | |
187 | dst -> sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addralign); | |
188 | dst -> sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_entsize); | |
189 | } | |
190 | ||
191 | ||
e0796d22 FF |
192 | /* Translate an ELF program header table entry in external format into an |
193 | ELF program header table entry in internal format. */ | |
194 | ||
195 | static void | |
8c4a1ace | 196 | DEFUN(elf_swap_phdr_in,(abfd, src, dst), |
e0796d22 FF |
197 | bfd *abfd AND |
198 | Elf_External_Phdr *src AND | |
199 | Elf_Internal_Phdr *dst) | |
200 | { | |
201 | dst -> p_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_type); | |
202 | dst -> p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_offset); | |
203 | dst -> p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_vaddr); | |
204 | dst -> p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_paddr); | |
205 | dst -> p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_filesz); | |
206 | dst -> p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_memsz); | |
207 | dst -> p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_flags); | |
208 | dst -> p_align = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_align); | |
209 | } | |
210 | ||
211 | ||
9ce0058c SC |
212 | /* Create a new bfd section from an ELF section header. */ |
213 | ||
214 | static boolean | |
215 | DEFUN(bfd_section_from_shdr, (abfd, hdr, shstrtab), | |
216 | bfd *abfd AND | |
217 | Elf_Internal_Shdr *hdr AND | |
218 | char *shstrtab) | |
219 | { | |
220 | asection *newsect; | |
221 | char *name; | |
222 | ||
223 | name = hdr -> sh_name ? shstrtab + hdr -> sh_name : "unnamed"; | |
224 | newsect = bfd_make_section (abfd, name); | |
225 | newsect -> vma = hdr -> sh_addr; | |
226 | newsect -> size = hdr -> sh_size; | |
227 | if (!(hdr -> sh_type == SHT_NOBITS)) | |
228 | { | |
229 | newsect -> filepos = hdr -> sh_offset; | |
230 | newsect -> flags |= SEC_HAS_CONTENTS; | |
231 | } | |
232 | if (hdr -> sh_flags & SHF_ALLOC) | |
233 | { | |
234 | newsect -> flags |= SEC_ALLOC; | |
235 | if (hdr -> sh_type != SHT_NOBITS) | |
236 | { | |
237 | newsect -> flags |= SEC_LOAD; | |
238 | } | |
239 | } | |
240 | if (!(hdr -> sh_flags & SHF_WRITE)) | |
241 | { | |
242 | newsect -> flags |= SEC_READONLY; | |
243 | } | |
244 | if (hdr -> sh_flags & SHF_EXECINSTR) | |
245 | { | |
246 | newsect -> flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
247 | } | |
e83f3040 FF |
248 | else |
249 | { | |
250 | newsect -> flags |= SEC_DATA; | |
251 | } | |
9ce0058c SC |
252 | if (hdr -> sh_type == SHT_SYMTAB) |
253 | { | |
254 | abfd -> flags |= HAS_SYMS; | |
255 | } | |
256 | ||
257 | return (true); | |
258 | } | |
259 | ||
e0796d22 FF |
260 | /* Create a new bfd section from an ELF program header. |
261 | ||
262 | Since program segments have no names, we generate a synthetic name | |
263 | of the form segment<NUM>, where NUM is generally the index in the | |
264 | program header table. For segments that are split (see below) we | |
265 | generate the names segment<NUM>a and segment<NUM>b. | |
266 | ||
267 | Note that some program segments may have a file size that is different than | |
268 | (less than) the memory size. All this means is that at execution the | |
269 | system must allocate the amount of memory specified by the memory size, | |
270 | but only initialize it with the first "file size" bytes read from the | |
271 | file. This would occur for example, with program segments consisting | |
272 | of combined data+bss. | |
273 | ||
274 | To handle the above situation, this routine generates TWO bfd sections | |
275 | for the single program segment. The first has the length specified by | |
276 | the file size of the segment, and the second has the length specified | |
277 | by the difference between the two sizes. In effect, the segment is split | |
278 | into it's initialized and uninitialized parts. | |
279 | ||
280 | */ | |
281 | ||
282 | static boolean | |
283 | DEFUN(bfd_section_from_phdr, (abfd, hdr, index), | |
284 | bfd *abfd AND | |
285 | Elf_Internal_Phdr *hdr AND | |
286 | int index) | |
287 | { | |
288 | asection *newsect; | |
289 | char *name; | |
290 | char namebuf[64]; | |
291 | int split; | |
292 | ||
293 | split = ((hdr -> p_memsz > 0) && | |
294 | (hdr -> p_filesz > 0) && | |
295 | (hdr -> p_memsz > hdr -> p_filesz)); | |
296 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
297 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
298 | (void) strcpy (name, namebuf); | |
299 | newsect = bfd_make_section (abfd, name); | |
300 | newsect -> vma = hdr -> p_vaddr; | |
301 | newsect -> size = hdr -> p_filesz; | |
302 | newsect -> filepos = hdr -> p_offset; | |
303 | newsect -> flags |= SEC_HAS_CONTENTS; | |
304 | if (hdr -> p_type == PT_LOAD) | |
305 | { | |
306 | newsect -> flags |= SEC_ALLOC; | |
307 | newsect -> flags |= SEC_LOAD; | |
308 | if (hdr -> p_flags & PF_X) | |
309 | { | |
310 | /* FIXME: all we known is that it has execute PERMISSION, | |
311 | may be data. */ | |
312 | newsect -> flags |= SEC_CODE; | |
313 | } | |
314 | } | |
315 | if (!(hdr -> p_flags & PF_W)) | |
316 | { | |
317 | newsect -> flags |= SEC_READONLY; | |
318 | } | |
319 | ||
320 | if (split) | |
321 | { | |
322 | sprintf (namebuf, "segment%db", index); | |
323 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
324 | (void) strcpy (name, namebuf); | |
325 | newsect = bfd_make_section (abfd, name); | |
326 | newsect -> vma = hdr -> p_vaddr + hdr -> p_filesz; | |
327 | newsect -> size = hdr -> p_memsz - hdr -> p_filesz; | |
328 | if (hdr -> p_type == PT_LOAD) | |
329 | { | |
330 | newsect -> flags |= SEC_ALLOC; | |
331 | if (hdr -> p_flags & PF_X) | |
332 | { | |
333 | newsect -> flags |= SEC_CODE; | |
334 | } | |
335 | } | |
336 | if (!(hdr -> p_flags & PF_W)) | |
337 | { | |
338 | newsect -> flags |= SEC_READONLY; | |
339 | } | |
340 | } | |
341 | ||
342 | return (true); | |
343 | } | |
344 | ||
8c4a1ace JG |
345 | #ifdef HAVE_PROCFS |
346 | ||
347 | static void | |
348 | DEFUN(bfd_prstatus,(abfd, descdata, descsz, filepos), | |
349 | bfd *abfd AND | |
350 | char *descdata AND | |
351 | int descsz AND | |
352 | long filepos) | |
353 | { | |
354 | asection *newsect; | |
355 | ||
356 | if (descsz == sizeof (prstatus_t)) | |
357 | { | |
358 | newsect = bfd_make_section (abfd, ".reg"); | |
359 | newsect -> size = sizeof (gregset_t); | |
360 | newsect -> filepos = filepos + (long) (((prstatus_t *)0) -> pr_reg); | |
361 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
362 | newsect -> alignment_power = 2; | |
363 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
364 | { | |
365 | bcopy (descdata, core_prstatus (abfd), descsz); | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
370 | /* Stash a copy of the prpsinfo structure away for future use. */ | |
371 | ||
372 | static void | |
373 | DEFUN(bfd_prpsinfo,(abfd, descdata, descsz, filepos), | |
374 | bfd *abfd AND | |
375 | char *descdata AND | |
376 | int descsz AND | |
377 | long filepos) | |
378 | { | |
379 | asection *newsect; | |
380 | ||
381 | if (descsz == sizeof (prpsinfo_t)) | |
382 | { | |
383 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
384 | { | |
385 | bcopy (descdata, core_prpsinfo (abfd), descsz); | |
386 | } | |
387 | } | |
388 | } | |
389 | ||
390 | static void | |
391 | DEFUN(bfd_fpregset,(abfd, descdata, descsz, filepos), | |
392 | bfd *abfd AND | |
393 | char *descdata AND | |
394 | int descsz AND | |
395 | long filepos) | |
396 | { | |
397 | asection *newsect; | |
398 | ||
399 | if (descsz == sizeof (fpregset_t)) | |
400 | { | |
401 | newsect = bfd_make_section (abfd, ".reg2"); | |
402 | newsect -> size = sizeof (fpregset_t); | |
403 | newsect -> filepos = filepos; | |
404 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
405 | newsect -> alignment_power = 2; | |
406 | } | |
407 | } | |
408 | ||
409 | #endif /* HAVE_PROCFS */ | |
410 | ||
411 | /* Return a pointer to the args (including the command name) that were | |
412 | seen by the program that generated the core dump. Note that for | |
413 | some reason, a spurious space is tacked onto the end of the args | |
414 | in some (at least one anyway) implementations, so strip it off if | |
415 | it exists. */ | |
416 | ||
417 | char * | |
418 | DEFUN(elf_core_file_failing_command, (abfd), | |
419 | bfd *abfd) | |
420 | { | |
421 | #if HAVE_PROCFS | |
422 | if (core_prpsinfo (abfd)) | |
423 | { | |
424 | prpsinfo_t *p = core_prpsinfo (abfd); | |
425 | char *scan = p -> pr_psargs; | |
426 | while (*scan++) {;} | |
427 | scan -= 2; | |
428 | if ((scan > p -> pr_psargs) && (*scan == ' ')) | |
429 | { | |
430 | *scan = '\000'; | |
431 | } | |
432 | return (p -> pr_psargs); | |
433 | } | |
434 | #endif | |
435 | return (NULL); | |
436 | } | |
437 | ||
438 | /* Return the number of the signal that caused the core dump. Presumably, | |
439 | since we have a core file, we got a signal of some kind, so don't bother | |
440 | checking the other process status fields, just return the signal number. | |
441 | */ | |
442 | ||
443 | static int | |
444 | DEFUN(elf_core_file_failing_signal, (abfd), | |
445 | bfd *abfd) | |
446 | { | |
447 | #if HAVE_PROCFS | |
448 | if (core_prstatus (abfd)) | |
449 | { | |
450 | return (((prstatus_t *)(core_prstatus (abfd))) -> pr_cursig); | |
451 | } | |
452 | #endif | |
453 | return (-1); | |
454 | } | |
455 | ||
456 | /* Check to see if the core file could reasonably be expected to have | |
457 | come for the current executable file. Note that by default we return | |
458 | true unless we find something that indicates that there might be a | |
459 | problem. | |
460 | */ | |
461 | ||
462 | static boolean | |
463 | DEFUN(elf_core_file_matches_executable_p, (core_bfd, exec_bfd), | |
464 | bfd *core_bfd AND | |
465 | bfd *exec_bfd) | |
466 | { | |
e83f3040 | 467 | #if HAVE_PROCFS |
8c4a1ace JG |
468 | char *corename; |
469 | char *execname; | |
e83f3040 | 470 | #endif |
8c4a1ace JG |
471 | |
472 | /* First, xvecs must match since both are ELF files for the same target. */ | |
473 | ||
474 | if (core_bfd->xvec != exec_bfd->xvec) | |
475 | { | |
476 | bfd_error = system_call_error; | |
477 | return (false); | |
478 | } | |
479 | ||
480 | #if HAVE_PROCFS | |
481 | ||
482 | /* If no prpsinfo, just return true. Otherwise, grab the last component | |
483 | of the exec'd pathname from the prpsinfo. */ | |
484 | ||
485 | if (core_prpsinfo (core_bfd)) | |
486 | { | |
487 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd)) -> pr_fname); | |
488 | } | |
489 | else | |
490 | { | |
491 | return (true); | |
492 | } | |
493 | ||
494 | /* Find the last component of the executable pathname. */ | |
495 | ||
496 | if ((execname = strrchr (exec_bfd -> filename, '/')) != NULL) | |
497 | { | |
498 | execname++; | |
499 | } | |
500 | else | |
501 | { | |
502 | execname = (char *) exec_bfd -> filename; | |
503 | } | |
504 | ||
505 | /* See if they match */ | |
506 | ||
507 | return (strcmp (execname, corename) ? false : true); | |
508 | ||
509 | #else | |
510 | ||
511 | return (true); | |
512 | ||
513 | #endif /* HAVE_PROCFS */ | |
514 | } | |
515 | ||
516 | /* ELF core files contain a segment of type PT_NOTE, that holds much of | |
517 | the information that would normally be available from the /proc interface | |
518 | for the process, at the time the process dumped core. Currently this | |
519 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
520 | ||
521 | Since these structures are potentially machine dependent in size and | |
522 | ordering, bfd provides two levels of support for them. The first level, | |
523 | available on all machines since it does not require that the host | |
524 | have /proc support or the relevant include files, is to create a bfd | |
525 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
526 | without any interpretation of their contents. With just this support, | |
527 | the bfd client will have to interpret the structures itself. Even with | |
528 | /proc support, it might want these full structures for it's own reasons. | |
529 | ||
530 | In the second level of support, where HAVE_PROCFS is defined, bfd will | |
531 | pick apart the structures to gather some additional information that | |
532 | clients may want, such as the general register set, the name of the | |
533 | exec'ed file and its arguments, the signal (if any) that caused the | |
534 | core dump, etc. | |
535 | ||
536 | */ | |
537 | ||
538 | static boolean | |
539 | DEFUN(elf_corefile_note, (abfd, hdr), | |
540 | bfd *abfd AND | |
541 | Elf_Internal_Phdr *hdr) | |
542 | { | |
543 | Elf_External_Note *x_note_p; /* Elf note, external form */ | |
544 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
545 | char *buf = NULL; /* Entire note segment contents */ | |
546 | char *namedata; /* Name portion of the note */ | |
547 | char *descdata; /* Descriptor portion of the note */ | |
548 | char *sectname; /* Name to use for new section */ | |
549 | long filepos; /* File offset to descriptor data */ | |
550 | asection *newsect; | |
551 | ||
552 | if (hdr -> p_filesz > 0 | |
e83f3040 | 553 | && (buf = (char *)malloc(hdr -> p_filesz)) != NULL |
8c4a1ace JG |
554 | && bfd_seek (abfd, hdr -> p_offset, SEEK_SET) != -1L |
555 | && bfd_read ((PTR) buf, hdr -> p_filesz, 1, abfd) == hdr -> p_filesz) | |
556 | { | |
557 | x_note_p = (Elf_External_Note *) buf; | |
558 | while ((char *) x_note_p < (buf + hdr -> p_filesz)) | |
559 | { | |
560 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> namesz); | |
561 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> descsz); | |
562 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> type); | |
563 | namedata = x_note_p -> name; | |
564 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
565 | filepos = hdr -> p_offset + (descdata - buf); | |
566 | switch (i_note.type) { | |
567 | case NT_PRSTATUS: | |
568 | /* process descdata as prstatus info */ | |
569 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); | |
570 | sectname = ".prstatus"; | |
571 | break; | |
572 | case NT_FPREGSET: | |
573 | /* process descdata as fpregset info */ | |
574 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); | |
575 | sectname = ".fpregset"; | |
576 | break; | |
577 | case NT_PRPSINFO: | |
578 | /* process descdata as prpsinfo */ | |
579 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); | |
580 | sectname = ".prpsinfo"; | |
581 | break; | |
582 | default: | |
583 | /* Unknown descriptor, just ignore it. */ | |
584 | sectname = NULL; | |
585 | break; | |
586 | } | |
587 | if (sectname != NULL) | |
588 | { | |
589 | newsect = bfd_make_section (abfd, sectname); | |
590 | newsect -> size = i_note.descsz; | |
591 | newsect -> filepos = filepos; | |
592 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
593 | newsect -> alignment_power = 2; | |
594 | } | |
595 | x_note_p = (Elf_External_Note *) | |
596 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
597 | } | |
598 | } | |
599 | if (buf != NULL) | |
600 | { | |
601 | free (buf); | |
602 | } | |
e83f3040 FF |
603 | return true; |
604 | ||
8c4a1ace JG |
605 | } |
606 | ||
607 | ||
e83f3040 FF |
608 | /* Read a specified number of bytes at a specified offset in an ELF |
609 | file, into a newly allocated buffer, and return a pointer to the | |
610 | buffer. */ | |
611 | ||
612 | static char * | |
613 | DEFUN(elf_read, (abfd, offset, size), | |
614 | bfd *abfd AND | |
615 | long offset AND | |
616 | int size) | |
617 | { | |
618 | char *buf; | |
619 | ||
620 | if ((buf = bfd_alloc (abfd, size)) == NULL) | |
621 | { | |
622 | bfd_error = no_memory; | |
623 | return (NULL); | |
624 | } | |
625 | if (bfd_seek (abfd, offset, SEEK_SET) == -1) | |
626 | { | |
627 | bfd_error = system_call_error; | |
628 | return (NULL); | |
629 | } | |
630 | if (bfd_read ((PTR) buf, size, 1, abfd) != size) | |
631 | { | |
632 | bfd_error = system_call_error; | |
633 | return (NULL); | |
634 | } | |
635 | return (buf); | |
636 | } | |
637 | ||
9ce0058c SC |
638 | /* Begin processing a given object. |
639 | ||
640 | First we validate the file by reading in the ELF header and checking | |
641 | the magic number. | |
642 | ||
643 | */ | |
644 | ||
645 | static bfd_target * | |
646 | DEFUN (elf_object_p, (abfd), bfd *abfd) | |
647 | { | |
648 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
649 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
650 | Elf_External_Shdr *x_shdr; /* Section header table, external form */ | |
651 | Elf_Internal_Shdr *i_shdr; /* Section header table, internal form */ | |
652 | int shindex; | |
653 | char *shstrtab; /* Internal copy of section header stringtab */ | |
654 | int shstrtabsize; /* Size of section header string table */ | |
e83f3040 | 655 | Elf_Off offset; /* Temp place to stash file offsets */ |
9ce0058c SC |
656 | |
657 | /* Read in the ELF header in external format. */ | |
658 | ||
659 | if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
660 | { | |
661 | bfd_error = system_call_error; | |
662 | return (NULL); | |
663 | } | |
664 | ||
665 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
666 | make use of. The magic number must match, the address size ('class') | |
667 | and byte-swapping must match our XVEC entry, and it must have a | |
668 | section header table (FIXME: See comments re sections at top of this | |
669 | file). */ | |
670 | ||
671 | if (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 || | |
672 | x_ehdr.e_ident[EI_MAG1] != ELFMAG1 || | |
673 | x_ehdr.e_ident[EI_MAG2] != ELFMAG2 || | |
674 | x_ehdr.e_ident[EI_MAG3] != ELFMAG3) | |
675 | { | |
676 | wrong: | |
677 | bfd_error = wrong_format; | |
678 | return (NULL); | |
679 | } | |
680 | ||
681 | /* FIXME, Check EI_VERSION here ! */ | |
682 | ||
683 | switch (x_ehdr.e_ident[EI_CLASS]) { | |
684 | case ELFCLASSNONE: /* address size not specified */ | |
685 | goto wrong; /* No support if can't tell address size */ | |
686 | case ELFCLASS32: /* 32-bit addresses */ | |
687 | break; | |
688 | case ELFCLASS64: /* 64-bit addresses */ | |
689 | goto wrong; /* FIXME: 64 bits not yet supported */ | |
690 | default: | |
691 | goto wrong; /* No support if unknown address class */ | |
692 | } | |
693 | ||
694 | /* Switch xvec to match the specified byte order. */ | |
695 | switch (x_ehdr.e_ident[EI_DATA]) { | |
696 | case ELFDATA2MSB: /* Big-endian */ | |
697 | abfd->xvec = &elf_big_vec; | |
698 | break; | |
699 | case ELFDATA2LSB: /* Little-endian */ | |
700 | abfd->xvec = &elf_little_vec; | |
eb8983c9 | 701 | break; |
9ce0058c SC |
702 | case ELFDATANONE: /* No data encoding specified */ |
703 | default: /* Unknown data encoding specified */ | |
704 | goto wrong; | |
705 | } | |
706 | ||
8c4a1ace JG |
707 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
708 | the tdata pointer in the bfd. */ | |
709 | ||
710 | if ((abfd -> tdata = bfd_zalloc (abfd, sizeof (elf_obj_tdata))) == NULL) | |
711 | { | |
712 | bfd_error = no_memory; | |
713 | return (NULL); | |
714 | } | |
715 | ||
9ce0058c | 716 | /* Now that we know the byte order, swap in the rest of the header */ |
8c4a1ace | 717 | elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr); |
e0796d22 FF |
718 | |
719 | /* If there is no section header table, we're hosed. */ | |
720 | if (i_ehdr.e_shoff == 0) | |
9ce0058c SC |
721 | goto wrong; |
722 | ||
723 | if (i_ehdr.e_type == ET_EXEC || i_ehdr.e_type == ET_DYN) | |
724 | { | |
725 | abfd -> flags |= EXEC_P; | |
726 | } | |
727 | ||
728 | /* Allocate space for copies of the section header table in external | |
729 | and internal form, seek to the section header table in the file, | |
730 | read it in, and convert it to internal form. As a simple sanity | |
731 | check, verify that the what BFD thinks is the size of each section | |
732 | header table entry actually matches the size recorded in the file. */ | |
733 | ||
734 | if (i_ehdr.e_shentsize != sizeof (*x_shdr)) | |
735 | goto wrong; | |
736 | if ((x_shdr = (Elf_External_Shdr *) | |
737 | bfd_alloc (abfd, sizeof (*x_shdr) * i_ehdr.e_shnum)) == NULL) | |
738 | { | |
739 | bfd_error = no_memory; | |
740 | return (NULL); | |
741 | } | |
742 | if ((i_shdr = (Elf_Internal_Shdr *) | |
743 | bfd_alloc (abfd, sizeof (*i_shdr) * i_ehdr.e_shnum)) == NULL) | |
744 | { | |
745 | bfd_error = no_memory; | |
746 | return (NULL); | |
747 | } | |
748 | if (bfd_seek (abfd, i_ehdr.e_shoff, SEEK_SET) == -1) | |
749 | { | |
750 | bfd_error = system_call_error; | |
751 | return (NULL); | |
752 | } | |
753 | for (shindex = 0; shindex < i_ehdr.e_shnum; shindex++) | |
754 | { | |
755 | if (bfd_read ((PTR) (x_shdr + shindex), sizeof (*x_shdr), 1, abfd) | |
756 | != sizeof (*x_shdr)) | |
757 | { | |
758 | bfd_error = system_call_error; | |
759 | return (NULL); | |
760 | } | |
8c4a1ace | 761 | elf_swap_shdr_in (abfd, x_shdr + shindex, i_shdr + shindex); |
9ce0058c SC |
762 | } |
763 | ||
764 | /* Read in the string table containing the names of the sections. We | |
765 | will need the base pointer to this table later. */ | |
766 | ||
767 | shstrtabsize = i_shdr[i_ehdr.e_shstrndx].sh_size; | |
e83f3040 FF |
768 | offset = i_shdr[i_ehdr.e_shstrndx].sh_offset; |
769 | if ((shstrtab = elf_read (abfd, offset, shstrtabsize)) == NULL) | |
9ce0058c | 770 | { |
9ce0058c SC |
771 | return (NULL); |
772 | } | |
e83f3040 | 773 | |
9ce0058c | 774 | /* Once all of the section headers have been read and converted, we |
a6c1d731 | 775 | can start processing them. Note that the first section header is |
8c4a1ace JG |
776 | a dummy placeholder entry, so we ignore it. |
777 | ||
778 | We also watch for the symbol table section and remember the file | |
779 | offset and section size for both the symbol table section and the | |
780 | associated string table section. */ | |
9ce0058c | 781 | |
a6c1d731 | 782 | for (shindex = 1; shindex < i_ehdr.e_shnum; shindex++) |
9ce0058c | 783 | { |
8c4a1ace JG |
784 | Elf_Internal_Shdr *hdr = i_shdr + shindex; |
785 | bfd_section_from_shdr (abfd, hdr, shstrtab); | |
786 | if (hdr -> sh_type == SHT_SYMTAB) | |
787 | { | |
788 | elf_symtab_filepos(abfd) = hdr -> sh_offset; | |
789 | elf_symtab_filesz(abfd) = hdr -> sh_size; | |
790 | elf_strtab_filepos(abfd) = (i_shdr + hdr -> sh_link) -> sh_offset; | |
791 | elf_strtab_filesz(abfd) = (i_shdr + hdr -> sh_link) -> sh_size; | |
792 | } | |
9ce0058c SC |
793 | } |
794 | ||
e83f3040 FF |
795 | /* Remember the entry point specified in the ELF file header. */ |
796 | ||
797 | bfd_get_start_address (abfd) = i_ehdr.e_entry; | |
798 | ||
9ce0058c SC |
799 | return (abfd->xvec); |
800 | } | |
801 | ||
e0796d22 FF |
802 | /* Core files are simply standard ELF formatted files that partition |
803 | the file using the execution view of the file (program header table) | |
804 | rather than the linking view. In fact, there is no section header | |
805 | table in a core file. | |
8c4a1ace JG |
806 | |
807 | The process status information (including the contents of the general | |
808 | register set) and the floating point register set are stored in a | |
809 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
810 | that allow standard bfd access to the general registers (.reg) and the | |
811 | floating point registers (.reg2). | |
812 | ||
e0796d22 FF |
813 | */ |
814 | ||
815 | static bfd_target * | |
816 | DEFUN (elf_core_file_p, (abfd), bfd *abfd) | |
817 | { | |
818 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
819 | Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ | |
820 | Elf_External_Phdr *x_phdr; /* Program header table, external form */ | |
821 | Elf_Internal_Phdr *i_phdr; /* Program header table, internal form */ | |
822 | int phindex; | |
823 | ||
824 | /* Read in the ELF header in external format. */ | |
825 | ||
826 | if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
827 | { | |
828 | bfd_error = system_call_error; | |
829 | return (NULL); | |
830 | } | |
831 | ||
832 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
833 | make use of. The magic number must match, the address size ('class') | |
834 | and byte-swapping must match our XVEC entry, and it must have a | |
835 | program header table (FIXME: See comments re segments at top of this | |
836 | file). */ | |
837 | ||
838 | if (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 || | |
839 | x_ehdr.e_ident[EI_MAG1] != ELFMAG1 || | |
840 | x_ehdr.e_ident[EI_MAG2] != ELFMAG2 || | |
841 | x_ehdr.e_ident[EI_MAG3] != ELFMAG3) | |
842 | { | |
843 | wrong: | |
844 | bfd_error = wrong_format; | |
845 | return (NULL); | |
846 | } | |
847 | ||
848 | /* FIXME, Check EI_VERSION here ! */ | |
849 | ||
850 | switch (x_ehdr.e_ident[EI_CLASS]) { | |
851 | case ELFCLASSNONE: /* address size not specified */ | |
852 | goto wrong; /* No support if can't tell address size */ | |
853 | case ELFCLASS32: /* 32-bit addresses */ | |
854 | break; | |
855 | case ELFCLASS64: /* 64-bit addresses */ | |
856 | goto wrong; /* FIXME: 64 bits not yet supported */ | |
857 | default: | |
858 | goto wrong; /* No support if unknown address class */ | |
859 | } | |
860 | ||
861 | /* Switch xvec to match the specified byte order. */ | |
862 | switch (x_ehdr.e_ident[EI_DATA]) { | |
863 | case ELFDATA2MSB: /* Big-endian */ | |
864 | abfd->xvec = &elf_big_vec; | |
865 | break; | |
866 | case ELFDATA2LSB: /* Little-endian */ | |
867 | abfd->xvec = &elf_little_vec; | |
eb8983c9 | 868 | break; |
e0796d22 FF |
869 | case ELFDATANONE: /* No data encoding specified */ |
870 | default: /* Unknown data encoding specified */ | |
871 | goto wrong; | |
872 | } | |
873 | ||
874 | /* Now that we know the byte order, swap in the rest of the header */ | |
8c4a1ace | 875 | elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr); |
e0796d22 FF |
876 | |
877 | /* If there is no program header, or the type is not a core file, then | |
878 | we are hosed. */ | |
879 | if (i_ehdr.e_phoff == 0 || i_ehdr.e_type != ET_CORE) | |
880 | goto wrong; | |
881 | ||
8c4a1ace JG |
882 | /* Allocate an instance of the elf_core_tdata structure and hook it up to |
883 | the tdata pointer in the bfd. */ | |
884 | ||
885 | if ((abfd -> tdata = bfd_zalloc (abfd, sizeof (elf_core_tdata))) == NULL) | |
886 | { | |
887 | bfd_error = no_memory; | |
888 | return (NULL); | |
889 | } | |
890 | ||
e0796d22 FF |
891 | /* Allocate space for copies of the program header table in external |
892 | and internal form, seek to the program header table in the file, | |
893 | read it in, and convert it to internal form. As a simple sanity | |
894 | check, verify that the what BFD thinks is the size of each program | |
895 | header table entry actually matches the size recorded in the file. */ | |
896 | ||
897 | if (i_ehdr.e_phentsize != sizeof (*x_phdr)) | |
898 | goto wrong; | |
899 | if ((x_phdr = (Elf_External_Phdr *) | |
900 | bfd_alloc (abfd, sizeof (*x_phdr) * i_ehdr.e_phnum)) == NULL) | |
901 | { | |
902 | bfd_error = no_memory; | |
903 | return (NULL); | |
904 | } | |
905 | if ((i_phdr = (Elf_Internal_Phdr *) | |
906 | bfd_alloc (abfd, sizeof (*i_phdr) * i_ehdr.e_phnum)) == NULL) | |
907 | { | |
908 | bfd_error = no_memory; | |
909 | return (NULL); | |
910 | } | |
911 | if (bfd_seek (abfd, i_ehdr.e_phoff, SEEK_SET) == -1) | |
912 | { | |
913 | bfd_error = system_call_error; | |
914 | return (NULL); | |
915 | } | |
916 | for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++) | |
917 | { | |
918 | if (bfd_read ((PTR) (x_phdr + phindex), sizeof (*x_phdr), 1, abfd) | |
919 | != sizeof (*x_phdr)) | |
920 | { | |
921 | bfd_error = system_call_error; | |
922 | return (NULL); | |
923 | } | |
8c4a1ace | 924 | elf_swap_phdr_in (abfd, x_phdr + phindex, i_phdr + phindex); |
e0796d22 FF |
925 | } |
926 | ||
927 | /* Once all of the program headers have been read and converted, we | |
928 | can start processing them. */ | |
929 | ||
930 | for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++) | |
931 | { | |
932 | bfd_section_from_phdr (abfd, i_phdr + phindex, phindex); | |
8c4a1ace JG |
933 | if ((i_phdr + phindex) -> p_type == PT_NOTE) |
934 | { | |
935 | elf_corefile_note (abfd, i_phdr + phindex); | |
936 | } | |
e0796d22 FF |
937 | } |
938 | ||
e83f3040 FF |
939 | /* Remember the entry point specified in the ELF file header. */ |
940 | ||
941 | bfd_get_start_address (abfd) = i_ehdr.e_entry; | |
942 | ||
e0796d22 FF |
943 | return (abfd->xvec); |
944 | } | |
945 | ||
9ce0058c SC |
946 | static boolean |
947 | DEFUN (elf_mkobject, (abfd), bfd *abfd) | |
948 | { | |
949 | fprintf (stderr, "elf_mkobject unimplemented\n"); | |
950 | fflush (stderr); | |
951 | abort (); | |
952 | return (false); | |
953 | } | |
954 | ||
955 | static boolean | |
956 | DEFUN (elf_write_object_contents, (abfd), bfd *abfd) | |
957 | { | |
958 | fprintf (stderr, "elf_write_object_contents unimplemented\n"); | |
959 | fflush (stderr); | |
960 | abort (); | |
961 | return (false); | |
962 | } | |
963 | ||
8c4a1ace JG |
964 | /* Given an index of a section, retrieve a pointer to it. Note |
965 | that for our purposes, sections are indexed by {1, 2, ...} with | |
966 | 0 being an illegal index. */ | |
967 | ||
968 | static struct sec * | |
969 | DEFUN (section_from_bfd_index, (abfd, index), | |
970 | bfd *abfd AND | |
971 | int index) | |
972 | { | |
973 | if (index > 0) | |
974 | { | |
975 | struct sec *answer = abfd -> sections; | |
976 | while (--index > 0) | |
977 | { | |
978 | answer = answer -> next; | |
979 | } | |
980 | return (answer); | |
981 | } | |
982 | return (NULL); | |
983 | } | |
984 | ||
985 | static boolean | |
986 | DEFUN (elf_slurp_symbol_table, (abfd), bfd *abfd) | |
987 | { | |
988 | int symcount; /* Number of external ELF symbols */ | |
989 | char *strtab; /* Buffer for raw ELF string table section */ | |
990 | asymbol *sym; /* Pointer to current bfd symbol */ | |
991 | asymbol *symbase; /* Buffer for generated bfd symbols */ | |
992 | asymbol **vec; /* Pointer to current bfd symbol pointer */ | |
993 | Elf_Internal_Sym i_sym; | |
994 | Elf_External_Sym x_sym; | |
995 | ||
996 | if (bfd_get_outsymbols (abfd) != NULL) | |
997 | { | |
998 | return (true); | |
999 | } | |
1000 | ||
1001 | /* Slurp in the string table. We will keep it around permanently, as | |
1002 | long as the bfd is in use, since we will end up setting up pointers | |
1003 | into it for the names of all the symbols. */ | |
1004 | ||
e83f3040 FF |
1005 | strtab = elf_read (abfd, elf_strtab_filepos(abfd), elf_strtab_filesz(abfd)); |
1006 | if (strtab == NULL) | |
8c4a1ace | 1007 | { |
8c4a1ace JG |
1008 | return (false); |
1009 | } | |
1010 | ||
1011 | /* Read each raw ELF symbol, converting from external ELF form to | |
1012 | internal ELF form, and then using the information to create a | |
1013 | canonical bfd symbol table entry. | |
1014 | ||
1015 | Note that be allocate the initial bfd canonical symbol buffer | |
1016 | based on a one-to-one mapping of the ELF symbols to canonical | |
1017 | symbols. However, it is likely that not all the ELF symbols will | |
1018 | be used, so there will be some space leftover at the end. Once | |
1019 | we know how many symbols we actual generate, we realloc the buffer | |
1020 | to the correct size and then build the pointer vector. */ | |
1021 | ||
1022 | if (bfd_seek (abfd, elf_symtab_filepos (abfd), SEEK_SET) == -1) | |
1023 | { | |
1024 | bfd_error = system_call_error; | |
1025 | return (false); | |
1026 | } | |
1027 | ||
1028 | symcount = elf_symtab_filesz(abfd) / sizeof (Elf_External_Sym); | |
1029 | sym = symbase = (asymbol *) bfd_zalloc (abfd, symcount * sizeof (asymbol)); | |
1030 | ||
1031 | while (symcount-- > 0) | |
1032 | { | |
1033 | if (bfd_read ((PTR) &x_sym, sizeof (x_sym), 1, abfd) != sizeof (x_sym)) | |
1034 | { | |
1035 | bfd_error = system_call_error; | |
1036 | return (false); | |
1037 | } | |
1038 | elf_swap_symbol_in (abfd, &x_sym, &i_sym); | |
1039 | if (i_sym.st_name > 0) | |
1040 | { | |
1041 | sym -> the_bfd = abfd; | |
1042 | sym -> name = strtab + i_sym.st_name; | |
1043 | sym -> value = i_sym.st_value; | |
1044 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) | |
1045 | { | |
1046 | /* Note: This code depends upon there being an ordered | |
1047 | one-for-one mapping of ELF sections to bfd sections. */ | |
1048 | sym -> section = section_from_bfd_index (abfd, i_sym.st_shndx); | |
1049 | } | |
1050 | else if (i_sym.st_shndx == SHN_ABS) | |
1051 | { | |
1052 | sym -> flags |= BSF_ABSOLUTE; | |
1053 | } | |
1054 | else if (i_sym.st_shndx == SHN_COMMON) | |
1055 | { | |
1056 | sym -> flags |= BSF_FORT_COMM; | |
1057 | } | |
1058 | switch (ELF_ST_BIND (i_sym.st_info)) | |
1059 | { | |
1060 | case STB_LOCAL: | |
1061 | sym -> flags |= BSF_LOCAL; | |
1062 | break; | |
1063 | case STB_GLOBAL: | |
1064 | sym -> flags |= (BSF_GLOBAL | BSF_EXPORT); | |
1065 | break; | |
1066 | case STB_WEAK: | |
1067 | sym -> flags |= BSF_WEAK; | |
1068 | break; | |
1069 | } | |
1070 | sym++; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | bfd_get_symcount(abfd) = symcount = sym - symbase; | |
1075 | sym = symbase = (asymbol *) | |
1076 | bfd_realloc (abfd, symbase, symcount * sizeof (asymbol)); | |
1077 | bfd_get_outsymbols(abfd) = vec = (asymbol **) | |
1078 | bfd_alloc (abfd, symcount * sizeof (asymbol *)); | |
1079 | ||
1080 | while (symcount-- > 0) | |
1081 | { | |
1082 | *vec++ = sym++; | |
1083 | } | |
1084 | ||
1085 | return (true); | |
1086 | } | |
1087 | ||
1088 | /* Return the number of bytes required to hold the symtab vector. | |
1089 | ||
1090 | Note that we base it on the count plus 1, since we will null terminate | |
1091 | the vector allocated based on this size. */ | |
1092 | ||
9ce0058c | 1093 | static unsigned int |
8c4a1ace | 1094 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd *abfd) |
9ce0058c | 1095 | { |
8c4a1ace JG |
1096 | unsigned int symtab_size = 0; |
1097 | ||
1098 | if (elf_slurp_symbol_table (abfd)) | |
1099 | { | |
1100 | symtab_size = (bfd_get_symcount (abfd) + 1) * (sizeof (asymbol)); | |
1101 | } | |
1102 | return (symtab_size); | |
9ce0058c SC |
1103 | } |
1104 | ||
1105 | static unsigned int | |
1106 | elf_get_reloc_upper_bound (abfd, asect) | |
1107 | bfd *abfd; | |
1108 | sec_ptr asect; | |
1109 | { | |
1110 | fprintf (stderr, "elf_get_reloc_upper_bound unimplemented\n"); | |
1111 | fflush (stderr); | |
1112 | abort (); | |
1113 | return (0); | |
1114 | } | |
1115 | ||
1116 | static unsigned int | |
1117 | elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
1118 | bfd *abfd; | |
1119 | sec_ptr section; | |
1120 | arelent **relptr; | |
1121 | asymbol **symbols; | |
1122 | { | |
1123 | fprintf (stderr, "elf_canonicalize_reloc unimplemented\n"); | |
1124 | fflush (stderr); | |
1125 | abort (); | |
1126 | return (0); | |
1127 | } | |
1128 | ||
1129 | static unsigned int | |
8c4a1ace JG |
1130 | DEFUN (elf_get_symtab, (abfd, alocation), |
1131 | bfd *abfd AND | |
1132 | asymbol **alocation) | |
9ce0058c | 1133 | { |
8c4a1ace JG |
1134 | unsigned int symcount; |
1135 | asymbol **vec; | |
1136 | ||
1137 | if (!elf_slurp_symbol_table (abfd)) | |
1138 | { | |
1139 | return (0); | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | symcount = bfd_get_symcount (abfd); | |
1144 | vec = bfd_get_outsymbols (abfd); | |
1145 | while (symcount-- > 0) | |
1146 | { | |
1147 | *alocation++ = *vec++; | |
1148 | } | |
1149 | *alocation++ = NULL; | |
1150 | return (bfd_get_symcount (abfd)); | |
1151 | } | |
9ce0058c SC |
1152 | } |
1153 | ||
1154 | static asymbol * | |
1155 | elf_make_empty_symbol(abfd) | |
1156 | bfd *abfd; | |
1157 | { | |
1158 | fprintf (stderr, "elf_make_empty_symbol unimplemented\n"); | |
1159 | fflush (stderr); | |
1160 | abort (); | |
1161 | return (NULL); | |
1162 | } | |
1163 | ||
1164 | static void | |
1165 | DEFUN (elf_print_symbol,(ignore_abfd, filep, symbol, how), | |
1166 | bfd *ignore_abfd AND | |
1167 | PTR filep AND | |
1168 | asymbol *symbol AND | |
e0796d22 | 1169 | bfd_print_symbol_type how) |
9ce0058c SC |
1170 | { |
1171 | fprintf (stderr, "elf_print_symbol unimplemented\n"); | |
1172 | fflush (stderr); | |
1173 | abort (); | |
1174 | } | |
1175 | ||
1176 | static alent * | |
1177 | DEFUN (elf_get_lineno,(ignore_abfd, symbol), | |
1178 | bfd *ignore_abfd AND | |
1179 | asymbol *symbol) | |
1180 | { | |
1181 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
1182 | fflush (stderr); | |
1183 | abort (); | |
1184 | return (NULL); | |
1185 | } | |
1186 | ||
1187 | static boolean | |
1188 | DEFUN (elf_set_arch_mach,(abfd, arch, machine), | |
1189 | bfd *abfd AND | |
1190 | enum bfd_architecture arch AND | |
1191 | unsigned long machine) | |
1192 | { | |
1193 | fprintf (stderr, "elf_set_arch_mach unimplemented\n"); | |
1194 | fflush (stderr); | |
1195 | /* Allow any architecture to be supported by the elf backend */ | |
1196 | return bfd_default_set_arch_mach(abfd, arch, machine); | |
1197 | } | |
1198 | ||
1199 | static boolean | |
1200 | DEFUN (elf_find_nearest_line,(abfd, | |
1201 | section, | |
1202 | symbols, | |
1203 | offset, | |
1204 | filename_ptr, | |
1205 | functionname_ptr, | |
1206 | line_ptr), | |
1207 | bfd *abfd AND | |
1208 | asection *section AND | |
1209 | asymbol **symbols AND | |
1210 | bfd_vma offset AND | |
1211 | CONST char **filename_ptr AND | |
1212 | CONST char **functionname_ptr AND | |
1213 | unsigned int *line_ptr) | |
1214 | { | |
1215 | fprintf (stderr, "elf_find_nearest_line unimplemented\n"); | |
1216 | fflush (stderr); | |
1217 | abort (); | |
1218 | return (false); | |
1219 | } | |
1220 | ||
1221 | static int | |
1222 | DEFUN (elf_sizeof_headers, (abfd, reloc), | |
1223 | bfd *abfd AND | |
1224 | boolean reloc) | |
1225 | { | |
1226 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); | |
1227 | fflush (stderr); | |
1228 | abort (); | |
1229 | return (0); | |
1230 | } | |
e0796d22 | 1231 | \f |
9ce0058c SC |
1232 | /* This structure contains everything that BFD knows about a target. |
1233 | It includes things like its byte order, name, what routines to call | |
1234 | to do various operations, etc. Every BFD points to a target structure | |
1235 | with its "xvec" member. | |
1236 | ||
1237 | There are two such structures here: one for big-endian machines and | |
1238 | one for little-endian machines. */ | |
1239 | ||
e0796d22 FF |
1240 | /* Archives are generic or unimplemented. */ |
1241 | #define elf_slurp_armap bfd_false | |
1242 | #define elf_slurp_extended_name_table _bfd_slurp_extended_name_table | |
1243 | #define elf_truncate_arname bfd_dont_truncate_arname | |
1244 | #define elf_openr_next_archived_file bfd_generic_openr_next_archived_file | |
1245 | #define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt | |
1246 | #define elf_write_armap (PROTO (boolean, (*), \ | |
a6c1d731 | 1247 | (bfd *arch, unsigned int elength, struct orl *map, unsigned int orl_count, \ |
e0796d22 FF |
1248 | int stridx))) bfd_false |
1249 | ||
1250 | /* Ordinary section reading and writing */ | |
1251 | #define elf_new_section_hook _bfd_dummy_new_section_hook | |
1252 | #define elf_get_section_contents bfd_generic_get_section_contents | |
1253 | #define elf_set_section_contents bfd_generic_set_section_contents | |
1254 | #define elf_close_and_cleanup bfd_generic_close_and_cleanup | |
1255 | ||
1256 | #define elf_bfd_debug_info_start bfd_void | |
1257 | #define elf_bfd_debug_info_end bfd_void | |
1258 | #define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void | |
1259 | ||
9ce0058c SC |
1260 | bfd_target elf_big_vec = |
1261 | { | |
1262 | /* name: identify kind of target */ | |
1263 | "elf-big", | |
1264 | ||
1265 | /* flavour: general indication about file */ | |
e0796d22 | 1266 | bfd_target_elf_flavour, |
9ce0058c SC |
1267 | |
1268 | /* byteorder_big_p: data is big endian */ | |
1269 | true, | |
1270 | ||
1271 | /* header_byteorder_big_p: header is also big endian */ | |
1272 | true, | |
1273 | ||
1274 | /* object_flags: mask of all file flags */ | |
1275 | (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | | |
1276 | DYNAMIC | WP_TEXT), | |
1277 | ||
1278 | /* section_flags: mask of all section flags */ | |
1279 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY | | |
1280 | SEC_DATA), | |
1281 | ||
1282 | /* ar_pad_char: pad character for filenames within an archive header | |
1283 | FIXME: this really has nothing to do with ELF, this is a characteristic | |
1284 | of the archiver and/or os and should be independently tunable */ | |
1285 | '/', | |
1286 | ||
1287 | /* ar_max_namelen: maximum number of characters in an archive header | |
1288 | FIXME: this really has nothing to do with ELF, this is a characteristic | |
1289 | of the archiver and should be independently tunable. This value is | |
1290 | a WAG (wild a** guess) */ | |
1291 | 15, | |
1292 | ||
1293 | /* align_power_min: minimum alignment restriction for any section | |
1294 | FIXME: this value may be target machine dependent */ | |
1295 | 3, | |
1296 | ||
1297 | /* Routines to byte-swap various sized integers from the data sections */ | |
1298 | _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, | |
1299 | ||
1300 | /* Routines to byte-swap various sized integers from the file headers */ | |
1301 | _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, | |
1302 | ||
1303 | /* bfd_check_format: check the format of a file being read */ | |
e0796d22 FF |
1304 | { _bfd_dummy_target, /* unknown format */ |
1305 | elf_object_p, /* assembler/linker output (object file) */ | |
1306 | bfd_generic_archive_p, /* an archive */ | |
1307 | elf_core_file_p /* a core file */ | |
9ce0058c SC |
1308 | }, |
1309 | ||
1310 | /* bfd_set_format: set the format of a file being written */ | |
1311 | { bfd_false, | |
1312 | elf_mkobject, | |
1313 | _bfd_generic_mkarchive, | |
1314 | bfd_false | |
1315 | }, | |
1316 | ||
1317 | /* bfd_write_contents: write cached information into a file being written */ | |
1318 | { bfd_false, | |
1319 | elf_write_object_contents, | |
1320 | _bfd_write_archive_contents, | |
1321 | bfd_false | |
1322 | }, | |
1323 | ||
1324 | /* Initialize a jump table with the standard macro. All names start | |
1325 | with "elf" */ | |
1326 | JUMP_TABLE(elf), | |
1327 | ||
1328 | /* SWAP_TABLE */ | |
1329 | NULL, NULL, NULL | |
1330 | }; | |
1331 | ||
1332 | bfd_target elf_little_vec = | |
1333 | { | |
1334 | /* name: identify kind of target */ | |
1335 | "elf-little", | |
1336 | ||
1337 | /* flavour: general indication about file */ | |
e0796d22 | 1338 | bfd_target_elf_flavour, |
9ce0058c SC |
1339 | |
1340 | /* byteorder_big_p: data is big endian */ | |
1341 | false, /* Nope -- this one's little endian */ | |
1342 | ||
1343 | /* header_byteorder_big_p: header is also big endian */ | |
1344 | false, /* Nope -- this one's little endian */ | |
1345 | ||
1346 | /* object_flags: mask of all file flags */ | |
1347 | (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | | |
1348 | DYNAMIC | WP_TEXT), | |
1349 | ||
1350 | /* section_flags: mask of all section flags */ | |
1351 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY | | |
1352 | SEC_DATA), | |
1353 | ||
1354 | /* ar_pad_char: pad character for filenames within an archive header | |
1355 | FIXME: this really has nothing to do with ELF, this is a characteristic | |
1356 | of the archiver and/or os and should be independently tunable */ | |
1357 | '/', | |
1358 | ||
1359 | /* ar_max_namelen: maximum number of characters in an archive header | |
1360 | FIXME: this really has nothing to do with ELF, this is a characteristic | |
1361 | of the archiver and should be independently tunable. This value is | |
1362 | a WAG (wild a** guess) */ | |
1363 | 15, | |
1364 | ||
1365 | /* align_power_min: minimum alignment restriction for any section | |
1366 | FIXME: this value may be target machine dependent */ | |
1367 | 3, | |
1368 | ||
1369 | /* Routines to byte-swap various sized integers from the data sections */ | |
1370 | _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, | |
1371 | ||
1372 | /* Routines to byte-swap various sized integers from the file headers */ | |
1373 | _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, | |
1374 | ||
1375 | /* bfd_check_format: check the format of a file being read */ | |
e0796d22 FF |
1376 | { _bfd_dummy_target, /* unknown format */ |
1377 | elf_object_p, /* assembler/linker output (object file) */ | |
1378 | bfd_generic_archive_p, /* an archive */ | |
1379 | elf_core_file_p /* a core file */ | |
9ce0058c SC |
1380 | }, |
1381 | ||
1382 | /* bfd_set_format: set the format of a file being written */ | |
1383 | { bfd_false, | |
1384 | elf_mkobject, | |
1385 | _bfd_generic_mkarchive, | |
1386 | bfd_false | |
1387 | }, | |
1388 | ||
1389 | /* bfd_write_contents: write cached information into a file being written */ | |
1390 | { bfd_false, | |
1391 | elf_write_object_contents, | |
1392 | _bfd_write_archive_contents, | |
1393 | bfd_false | |
1394 | }, | |
1395 | ||
1396 | /* Initialize a jump table with the standard macro. All names start | |
1397 | with "elf" */ | |
1398 | JUMP_TABLE(elf), | |
1399 | ||
1400 | /* SWAP_TABLE */ | |
1401 | NULL, NULL, NULL | |
1402 | }; |