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po: Updated Korean translation.
[wine.git] / dlls / dbghelp / elf_module.c
blob969e8c045ab660a09fc7b708f28524baa85d45bd
1 /*
2 * File elf.c - processing of ELF files
3 *
4 * Copyright (C) 1996, Eric Youngdale.
5 * 1999-2007 Eric Pouech
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include "config.h"
23 #include "wine/port.h"
24
25 #if defined(__svr4__) || defined(__sun)
26 #define __ELF__ 1
27 /* large files are not supported by libelf */
28 #undef _FILE_OFFSET_BITS
29 #define _FILE_OFFSET_BITS 32
30 #endif
31
32 #include <assert.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #ifdef HAVE_SYS_STAT_H
36 # include <sys/stat.h>
37 #endif
38 #include <fcntl.h>
39 #ifdef HAVE_SYS_MMAN_H
40 #include <sys/mman.h>
41 #endif
42 #ifdef HAVE_UNISTD_H
43 # include <unistd.h>
44 #endif
45 #ifndef PATH_MAX
46 #define PATH_MAX MAX_PATH
47 #endif
48
49 #include "dbghelp_private.h"
50
51 #include "image_private.h"
52
53 #include "wine/library.h"
54 #include "wine/debug.h"
55
56 #ifdef __ELF__
57
58 #define ELF_INFO_DEBUG_HEADER 0x0001
59 #define ELF_INFO_MODULE 0x0002
60 #define ELF_INFO_NAME 0x0004
61
62 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
63
64 struct elf_info
65 {
66 unsigned flags; /* IN one (or several) of the ELF_INFO constants */
67 DWORD_PTR dbg_hdr_addr; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
68 struct module* module; /* OUT loaded module (if ELF_INFO_MODULE is set) */
69 const WCHAR* module_name; /* OUT found module name (if ELF_INFO_NAME is set) */
70 };
71
72 struct symtab_elt
73 {
74 struct hash_table_elt ht_elt;
75 const Elf_Sym* symp;
76 struct symt_compiland* compiland;
77 unsigned used;
78 };
79
80 struct elf_thunk_area
81 {
82 const char* symname;
83 THUNK_ORDINAL ordinal;
84 unsigned long rva_start;
85 unsigned long rva_end;
86 };
87
88 struct elf_module_info
89 {
90 unsigned long elf_addr;
91 unsigned short elf_mark : 1,
92 elf_loader : 1;
93 struct image_file_map file_map;
94 };
95
96 /******************************************************************
97 * elf_map_section
98 *
99 * Maps a single section into memory from an ELF file
100 */
101 const char* elf_map_section(struct image_section_map* ism)
102 {
103 struct elf_file_map* fmap = &ism->fmap->u.elf;
104
105 unsigned long pgsz = getpagesize();
106 unsigned long ofst, size;
107
108 assert(ism->fmap->modtype == DMT_ELF);
109 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum ||
110 fmap->sect[ism->sidx].shdr.sh_type == SHT_NOBITS)
111 return IMAGE_NO_MAP;
112
113 if (fmap->target_copy)
114 {
115 return fmap->target_copy + fmap->sect[ism->sidx].shdr.sh_offset;
116 }
117 /* align required information on page size (we assume pagesize is a power of 2) */
118 ofst = fmap->sect[ism->sidx].shdr.sh_offset & ~(pgsz - 1);
119 size = ((fmap->sect[ism->sidx].shdr.sh_offset +
120 fmap->sect[ism->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
121 fmap->sect[ism->sidx].mapped = mmap(NULL, size, PROT_READ, MAP_PRIVATE,
122 fmap->fd, ofst);
123 if (fmap->sect[ism->sidx].mapped == IMAGE_NO_MAP) return IMAGE_NO_MAP;
124 return fmap->sect[ism->sidx].mapped + (fmap->sect[ism->sidx].shdr.sh_offset & (pgsz - 1));
125 }
126
127 /******************************************************************
128 * elf_find_section
129 *
130 * Finds a section by name (and type) into memory from an ELF file
131 * or its alternate if any
132 */
133 BOOL elf_find_section(struct image_file_map* _fmap, const char* name,
134 unsigned sht, struct image_section_map* ism)
135 {
136 struct elf_file_map* fmap;
137 unsigned i;
138
139 while (_fmap)
140 {
141 fmap = &_fmap->u.elf;
142 if (fmap->shstrtab == IMAGE_NO_MAP)
143 {
144 struct image_section_map hdr_ism = {_fmap, fmap->elfhdr.e_shstrndx};
145 if ((fmap->shstrtab = elf_map_section(&hdr_ism)) == IMAGE_NO_MAP) break;
146 }
147 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
148 {
149 if (strcmp(fmap->shstrtab + fmap->sect[i].shdr.sh_name, name) == 0 &&
150 (sht == SHT_NULL || sht == fmap->sect[i].shdr.sh_type))
151 {
152 ism->fmap = _fmap;
153 ism->sidx = i;
154 return TRUE;
155 }
156 }
157 _fmap = fmap->alternate;
158 }
159 ism->fmap = NULL;
160 ism->sidx = -1;
161 return FALSE;
162 }
163
164 /******************************************************************
165 * elf_unmap_section
166 *
167 * Unmaps a single section from memory
168 */
169 void elf_unmap_section(struct image_section_map* ism)
170 {
171 struct elf_file_map* fmap = &ism->fmap->u.elf;
172
173 if (ism->sidx >= 0 && ism->sidx < fmap->elfhdr.e_shnum && !fmap->target_copy &&
174 fmap->sect[ism->sidx].mapped != IMAGE_NO_MAP)
175 {
176 unsigned long pgsz = getpagesize();
177 unsigned long ofst, size;
178
179 ofst = fmap->sect[ism->sidx].shdr.sh_offset & ~(pgsz - 1);
180 size = ((fmap->sect[ism->sidx].shdr.sh_offset +
181 fmap->sect[ism->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
182 if (munmap((char*)fmap->sect[ism->sidx].mapped, size) < 0)
183 WARN("Couldn't unmap the section\n");
184 fmap->sect[ism->sidx].mapped = IMAGE_NO_MAP;
185 }
186 }
187
188 static void elf_end_find(struct image_file_map* fmap)
189 {
190 struct image_section_map ism;
191
192 while (fmap)
193 {
194 ism.fmap = fmap;
195 ism.sidx = fmap->u.elf.elfhdr.e_shstrndx;
196 elf_unmap_section(&ism);
197 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
198 fmap = fmap->u.elf.alternate;
199 }
200 }
201
202 /******************************************************************
203 * elf_get_map_rva
204 *
205 * Get the RVA of an ELF section
206 */
207 DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
208 {
209 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
210 return 0;
211 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_addr - ism->fmap->u.elf.elf_start;
212 }
213
214 /******************************************************************
215 * elf_get_map_size
216 *
217 * Get the size of an ELF section
218 */
219 unsigned elf_get_map_size(const struct image_section_map* ism)
220 {
221 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
222 return 0;
223 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_size;
224 }
225
226 static inline void elf_reset_file_map(struct image_file_map* fmap)
227 {
228 fmap->u.elf.fd = -1;
229 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
230 fmap->u.elf.alternate = NULL;
231 fmap->u.elf.target_copy = NULL;
232 }
233
234 struct elf_map_file_data
235 {
236 enum {from_file, from_process} kind;
237 union
238 {
239 struct
240 {
241 const WCHAR* filename;
242 } file;
243 struct
244 {
245 HANDLE handle;
246 void* load_addr;
247 } process;
248 } u;
249 };
250
251 static BOOL elf_map_file_read(struct image_file_map* fmap, struct elf_map_file_data* emfd,
252 void* buf, size_t len, off_t off)
253 {
254 SIZE_T dw;
255
256 switch (emfd->kind)
257 {
258 case from_file:
259 return pread(fmap->u.elf.fd, buf, len, off) == len;
260 case from_process:
261 return ReadProcessMemory(emfd->u.process.handle,
262 (void*)((unsigned long)emfd->u.process.load_addr + (unsigned long)off),
263 buf, len, &dw) && dw == len;
264 default:
265 assert(0);
266 return FALSE;
267 }
268 }
269
270 /******************************************************************
271 * elf_map_file
272 *
273 * Maps an ELF file into memory (and checks it's a real ELF file)
274 */
275 static BOOL elf_map_file(struct elf_map_file_data* emfd, struct image_file_map* fmap)
276 {
277 static const BYTE elf_signature[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
278 struct stat statbuf;
279 int i;
280 Elf_Phdr phdr;
281 unsigned long tmp, page_mask = getpagesize() - 1;
282 char* filename;
283 unsigned len;
284 BOOL ret = FALSE;
285
286 switch (emfd->kind)
287 {
288 case from_file:
289 len = WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, NULL, 0, NULL, NULL);
290 if (!(filename = HeapAlloc(GetProcessHeap(), 0, len))) return FALSE;
291 WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, filename, len, NULL, NULL);
292 break;
293 case from_process:
294 filename = NULL;
295 break;
296 default: assert(0);
297 return FALSE;
298 }
299
300 elf_reset_file_map(fmap);
301
302 fmap->modtype = DMT_ELF;
303 fmap->u.elf.fd = -1;
304 fmap->u.elf.target_copy = NULL;
305
306 switch (emfd->kind)
307 {
308 case from_file:
309 /* check that the file exists, and that the module hasn't been loaded yet */
310 if (stat(filename, &statbuf) == -1 || S_ISDIR(statbuf.st_mode)) goto done;
311
312 /* Now open the file, so that we can mmap() it. */
313 if ((fmap->u.elf.fd = open(filename, O_RDONLY)) == -1) goto done;
314 break;
315 case from_process:
316 break;
317 }
318 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr, sizeof(fmap->u.elf.elfhdr), 0))
319 goto done;
320
321 /* and check for an ELF header */
322 if (memcmp(fmap->u.elf.elfhdr.e_ident,
323 elf_signature, sizeof(elf_signature))) goto done;
324 /* and check 32 vs 64 size according to current machine */
325 #ifdef _WIN64
326 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS64) goto done;
327 #else
328 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS32) goto done;
329 #endif
330 fmap->u.elf.sect = HeapAlloc(GetProcessHeap(), 0,
331 fmap->u.elf.elfhdr.e_shnum * sizeof(fmap->u.elf.sect[0]));
332 if (!fmap->u.elf.sect) goto done;
333
334 for (i = 0; i < fmap->u.elf.elfhdr.e_shnum; i++)
335 {
336 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.sect[i].shdr, sizeof(fmap->u.elf.sect[i].shdr),
337 fmap->u.elf.elfhdr.e_shoff + i * sizeof(fmap->u.elf.sect[i].shdr)))
338 {
339 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
340 fmap->u.elf.sect = NULL;
341 goto done;
342 }
343 fmap->u.elf.sect[i].mapped = IMAGE_NO_MAP;
344 }
345
346 /* grab size of module once loaded in memory */
347 fmap->u.elf.elf_size = 0;
348 fmap->u.elf.elf_start = ~0L;
349 for (i = 0; i < fmap->u.elf.elfhdr.e_phnum; i++)
350 {
351 if (elf_map_file_read(fmap, emfd, &phdr, sizeof(phdr),
352 fmap->u.elf.elfhdr.e_phoff + i * sizeof(phdr)) &&
353 phdr.p_type == PT_LOAD)
354 {
355 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
356 if (fmap->u.elf.elf_size < tmp) fmap->u.elf.elf_size = tmp;
357 if (phdr.p_vaddr < fmap->u.elf.elf_start) fmap->u.elf.elf_start = phdr.p_vaddr;
358 }
359 }
360 /* if non relocatable ELF, then remove fixed address from computation
361 * otherwise, all addresses are zero based and start has no effect
362 */
363 fmap->u.elf.elf_size -= fmap->u.elf.elf_start;
364
365 switch (emfd->kind)
366 {
367 case from_file: break;
368 case from_process:
369 if (!(fmap->u.elf.target_copy = HeapAlloc(GetProcessHeap(), 0, fmap->u.elf.elf_size)))
370 {
371 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
372 goto done;
373 }
374 if (!ReadProcessMemory(emfd->u.process.handle, emfd->u.process.load_addr, fmap->u.elf.target_copy,
375 fmap->u.elf.elf_size, NULL))
376 {
377 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
378 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
379 goto done;
380 }
381 break;
382 }
383 ret = TRUE;
384 done:
385 HeapFree(GetProcessHeap(), 0, filename);
386 return ret;
387 }
388
389 /******************************************************************
390 * elf_unmap_file
391 *
392 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
393 */
394 static void elf_unmap_file(struct image_file_map* fmap)
395 {
396 while (fmap)
397 {
398 if (fmap->u.elf.fd != -1)
399 {
400 struct image_section_map ism;
401 ism.fmap = fmap;
402 for (ism.sidx = 0; ism.sidx < fmap->u.elf.elfhdr.e_shnum; ism.sidx++)
403 {
404 elf_unmap_section(&ism);
405 }
406 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
407 close(fmap->u.elf.fd);
408 }
409 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
410 fmap = fmap->u.elf.alternate;
411 }
412 }
413
414 static void elf_module_remove(struct process* pcs, struct module_format* modfmt)
415 {
416 elf_unmap_file(&modfmt->u.elf_info->file_map);
417 HeapFree(GetProcessHeap(), 0, modfmt);
418 }
419
420 /******************************************************************
421 * elf_is_in_thunk_area
422 *
423 * Check whether an address lies within one of the thunk area we
424 * know of.
425 */
426 int elf_is_in_thunk_area(unsigned long addr,
427 const struct elf_thunk_area* thunks)
428 {
429 unsigned i;
430
431 if (thunks) for (i = 0; thunks[i].symname; i++)
432 {
433 if (addr >= thunks[i].rva_start && addr < thunks[i].rva_end)
434 return i;
435 }
436 return -1;
437 }
438
439 /******************************************************************
440 * elf_hash_symtab
441 *
442 * creating an internal hash table to ease use ELF symtab information lookup
443 */
444 static void elf_hash_symtab(struct module* module, struct pool* pool,
445 struct hash_table* ht_symtab, struct image_file_map* fmap,
446 struct elf_thunk_area* thunks)
447 {
448 int i, j, nsym;
449 const char* strp;
450 const char* symname;
451 struct symt_compiland* compiland = NULL;
452 const char* ptr;
453 const Elf_Sym* symp;
454 struct symtab_elt* ste;
455 struct image_section_map ism, ism_str;
456
457 if (!elf_find_section(fmap, ".symtab", SHT_SYMTAB, &ism) &&
458 !elf_find_section(fmap, ".dynsym", SHT_DYNSYM, &ism)) return;
459 if ((symp = (const Elf_Sym*)image_map_section(&ism)) == IMAGE_NO_MAP) return;
460 ism_str.fmap = ism.fmap;
461 ism_str.sidx = fmap->u.elf.sect[ism.sidx].shdr.sh_link;
462 if ((strp = image_map_section(&ism_str)) == IMAGE_NO_MAP)
463 {
464 image_unmap_section(&ism);
465 return;
466 }
467
468 nsym = image_get_map_size(&ism) / sizeof(*symp);
469
470 for (j = 0; thunks[j].symname; j++)
471 thunks[j].rva_start = thunks[j].rva_end = 0;
472
473 for (i = 0; i < nsym; i++, symp++)
474 {
475 /* Ignore certain types of entries which really aren't of that much
476 * interest.
477 */
478 if ((ELF32_ST_TYPE(symp->st_info) != STT_NOTYPE &&
479 ELF32_ST_TYPE(symp->st_info) != STT_FILE &&
480 ELF32_ST_TYPE(symp->st_info) != STT_OBJECT &&
481 ELF32_ST_TYPE(symp->st_info) != STT_FUNC) ||
482 symp->st_shndx == SHN_UNDEF)
483 {
484 continue;
485 }
486
487 symname = strp + symp->st_name;
488
489 /* handle some specific symtab (that we'll throw away when done) */
490 switch (ELF32_ST_TYPE(symp->st_info))
491 {
492 case STT_FILE:
493 if (symname)
494 compiland = symt_new_compiland(module, symp->st_value,
495 source_new(module, NULL, symname));
496 else
497 compiland = NULL;
498 continue;
499 case STT_NOTYPE:
500 /* we are only interested in wine markers inserted by winebuild */
501 for (j = 0; thunks[j].symname; j++)
502 {
503 if (!strcmp(symname, thunks[j].symname))
504 {
505 thunks[j].rva_start = symp->st_value;
506 thunks[j].rva_end = symp->st_value + symp->st_size;
507 break;
508 }
509 }
510 continue;
511 }
512
513 /* FIXME: we don't need to handle them (GCC internals)
514 * Moreover, they screw up our symbol lookup :-/
515 */
516 if (symname[0] == '.' && symname[1] == 'L' && isdigit(symname[2]))
517 continue;
518
519 ste = pool_alloc(pool, sizeof(*ste));
520 ste->ht_elt.name = symname;
521 /* GCC emits, in some cases, a .<digit>+ suffix.
522 * This is used for static variable inside functions, so
523 * that we can have several such variables with same name in
524 * the same compilation unit
525 * We simply ignore that suffix when present (we also get rid
526 * of it in stabs parsing)
527 */
528 ptr = symname + strlen(symname) - 1;
529 if (isdigit(*ptr))
530 {
531 while (isdigit(*ptr) && ptr >= symname) ptr--;
532 if (ptr > symname && *ptr == '.')
533 {
534 char* n = pool_alloc(pool, ptr - symname + 1);
535 memcpy(n, symname, ptr - symname + 1);
536 n[ptr - symname] = '\0';
537 ste->ht_elt.name = n;
538 }
539 }
540 ste->symp = symp;
541 ste->compiland = compiland;
542 ste->used = 0;
543 hash_table_add(ht_symtab, &ste->ht_elt);
544 }
545 /* as we added in the ht_symtab pointers to the symbols themselves,
546 * we cannot unmap yet the sections, it will be done when we're over
547 * with this ELF file
548 */
549 }
550
551 /******************************************************************
552 * elf_lookup_symtab
553 *
554 * lookup a symbol by name in our internal hash table for the symtab
555 */
556 static const Elf_Sym* elf_lookup_symtab(const struct module* module,
557 const struct hash_table* ht_symtab,
558 const char* name, const struct symt* compiland)
559 {
560 struct symtab_elt* weak_result = NULL; /* without compiland name */
561 struct symtab_elt* result = NULL;
562 struct hash_table_iter hti;
563 struct symtab_elt* ste;
564 const char* compiland_name;
565 const char* compiland_basename;
566 const char* base;
567
568 /* we need weak match up (at least) when symbols of same name,
569 * defined several times in different compilation units,
570 * are merged in a single one (hence a different filename for c.u.)
571 */
572 if (compiland)
573 {
574 compiland_name = source_get(module,
575 ((const struct symt_compiland*)compiland)->source);
576 compiland_basename = strrchr(compiland_name, '/');
577 if (!compiland_basename++) compiland_basename = compiland_name;
578 }
579 else compiland_name = compiland_basename = NULL;
580
581 hash_table_iter_init(ht_symtab, &hti, name);
582 while ((ste = hash_table_iter_up(&hti)))
583 {
584 if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
585
586 weak_result = ste;
587 if ((ste->compiland && !compiland_name) || (!ste->compiland && compiland_name))
588 continue;
589 if (ste->compiland && compiland_name)
590 {
591 const char* filename = source_get(module, ste->compiland->source);
592 if (strcmp(filename, compiland_name))
593 {
594 base = strrchr(filename, '/');
595 if (!base++) base = filename;
596 if (strcmp(base, compiland_basename)) continue;
597 }
598 }
599 if (result)
600 {
601 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
602 name, compiland_name,
603 source_get(module, result->compiland->source), (unsigned int)result->symp->st_value,
604 source_get(module, ste->compiland->source), (unsigned int)ste->symp->st_value);
605 }
606 else
607 {
608 result = ste;
609 ste->used = 1;
610 }
611 }
612 if (!result && !(result = weak_result))
613 {
614 FIXME("Couldn't find symbol %s!%s in symtab\n",
615 debugstr_w(module->module.ModuleName), name);
616 return NULL;
617 }
618 return result->symp;
619 }
620
621 /******************************************************************
622 * elf_finish_stabs_info
623 *
624 * - get any relevant information (address & size) from the bits we got from the
625 * stabs debugging information
626 */
627 static void elf_finish_stabs_info(struct module* module, const struct hash_table* symtab)
628 {
629 struct hash_table_iter hti;
630 void* ptr;
631 struct symt_ht* sym;
632 const Elf_Sym* symp;
633 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
634
635 hash_table_iter_init(&module->ht_symbols, &hti, NULL);
636 while ((ptr = hash_table_iter_up(&hti)))
637 {
638 sym = GET_ENTRY(ptr, struct symt_ht, hash_elt);
639 switch (sym->symt.tag)
640 {
641 case SymTagFunction:
642 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
643 ((struct symt_function*)sym)->size)
644 {
645 break;
646 }
647 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
648 ((struct symt_function*)sym)->container);
649 if (symp)
650 {
651 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
652 ((struct symt_function*)sym)->address != elf_info->elf_addr + symp->st_value)
653 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
654 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
655 ((struct symt_function*)sym)->address, elf_info->elf_addr + symp->st_value);
656 if (((struct symt_function*)sym)->size && ((struct symt_function*)sym)->size != symp->st_size)
657 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
658 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
659 ((struct symt_function*)sym)->size, (unsigned int)symp->st_size);
660
661 ((struct symt_function*)sym)->address = elf_info->elf_addr + symp->st_value;
662 ((struct symt_function*)sym)->size = symp->st_size;
663 } else
664 FIXME("Couldn't find %s!%s\n",
665 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
666 break;
667 case SymTagData:
668 switch (((struct symt_data*)sym)->kind)
669 {
670 case DataIsGlobal:
671 case DataIsFileStatic:
672 if (((struct symt_data*)sym)->u.var.kind != loc_absolute ||
673 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr)
674 break;
675 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
676 ((struct symt_data*)sym)->container);
677 if (symp)
678 {
679 if (((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr &&
680 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr + symp->st_value)
681 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
682 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
683 ((struct symt_function*)sym)->address, elf_info->elf_addr + symp->st_value);
684 ((struct symt_data*)sym)->u.var.offset = elf_info->elf_addr + symp->st_value;
685 ((struct symt_data*)sym)->kind = (ELF32_ST_BIND(symp->st_info) == STB_LOCAL) ?
686 DataIsFileStatic : DataIsGlobal;
687 } else
688 FIXME("Couldn't find %s!%s\n",
689 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
690 break;
691 default:;
692 }
693 break;
694 default:
695 FIXME("Unsupported tag %u\n", sym->symt.tag);
696 break;
697 }
698 }
699 /* since we may have changed some addresses & sizes, mark the module to be resorted */
700 module->sortlist_valid = FALSE;
701 }
702
703 /******************************************************************
704 * elf_load_wine_thunks
705 *
706 * creating the thunk objects for a wine native DLL
707 */
708 static int elf_new_wine_thunks(struct module* module, const struct hash_table* ht_symtab,
709 const struct elf_thunk_area* thunks)
710 {
711 int j;
712 struct hash_table_iter hti;
713 struct symtab_elt* ste;
714 DWORD_PTR addr;
715 struct symt_ht* symt;
716
717 hash_table_iter_init(ht_symtab, &hti, NULL);
718 while ((ste = hash_table_iter_up(&hti)))
719 {
720 if (ste->used) continue;
721
722 addr = module->reloc_delta + ste->symp->st_value;
723
724 j = elf_is_in_thunk_area(ste->symp->st_value, thunks);
725 if (j >= 0) /* thunk found */
726 {
727 symt_new_thunk(module, ste->compiland, ste->ht_elt.name, thunks[j].ordinal,
728 addr, ste->symp->st_size);
729 }
730 else
731 {
732 ULONG64 ref_addr;
733 struct location loc;
734
735 symt = symt_find_nearest(module, addr);
736 if (symt && !symt_get_address(&symt->symt, &ref_addr))
737 ref_addr = addr;
738 if (!symt || addr != ref_addr)
739 {
740 /* creating public symbols for all the ELF symbols which haven't been
741 * used yet (ie we have no debug information on them)
742 * That's the case, for example, of the .spec.c files
743 */
744 switch (ELF32_ST_TYPE(ste->symp->st_info))
745 {
746 case STT_FUNC:
747 symt_new_function(module, ste->compiland, ste->ht_elt.name,
748 addr, ste->symp->st_size, NULL);
749 break;
750 case STT_OBJECT:
751 loc.kind = loc_absolute;
752 loc.reg = 0;
753 loc.offset = addr;
754 symt_new_global_variable(module, ste->compiland, ste->ht_elt.name,
755 ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL,
756 loc, ste->symp->st_size, NULL);
757 break;
758 default:
759 FIXME("Shouldn't happen\n");
760 break;
761 }
762 /* FIXME: this is a hack !!!
763 * we are adding new symbols, but as we're parsing a symbol table
764 * (hopefully without duplicate symbols) we delay rebuilding the sorted
765 * module table until we're done with the symbol table
766 * Otherwise, as we intertwine symbols' add and lookup, performance
767 * is rather bad
768 */
769 module->sortlist_valid = TRUE;
770 }
771 }
772 }
773 /* see comment above */
774 module->sortlist_valid = FALSE;
775 return TRUE;
776 }
777
778 /******************************************************************
779 * elf_new_public_symbols
780 *
781 * Creates a set of public symbols from an ELF symtab
782 */
783 static int elf_new_public_symbols(struct module* module, const struct hash_table* symtab)
784 {
785 struct hash_table_iter hti;
786 struct symtab_elt* ste;
787
788 if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
789
790 /* FIXME: we're missing the ELF entry point here */
791
792 hash_table_iter_init(symtab, &hti, NULL);
793 while ((ste = hash_table_iter_up(&hti)))
794 {
795 symt_new_public(module, ste->compiland, ste->ht_elt.name,
796 module->reloc_delta + ste->symp->st_value,
797 ste->symp->st_size);
798 }
799 return TRUE;
800 }
801
802 static BOOL elf_check_debug_link(const WCHAR* file, struct image_file_map* fmap, DWORD crc)
803 {
804 BOOL ret;
805 struct elf_map_file_data emfd;
806
807 emfd.kind = from_file;
808 emfd.u.file.filename = file;
809 if (!elf_map_file(&emfd, fmap)) return FALSE;
810 if (!(ret = crc == calc_crc32(fmap->u.elf.fd)))
811 {
812 WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
813 debugstr_w(file), calc_crc32(fmap->u.elf.fd), crc);
814 elf_unmap_file(fmap);
815 }
816 return ret;
817 }
818
819 /******************************************************************
820 * elf_locate_debug_link
821 *
822 * Locate a filename from a .gnu_debuglink section, using the same
823 * strategy as gdb:
824 * "If the full name of the directory containing the executable is
825 * execdir, and the executable has a debug link that specifies the
826 * name debugfile, then GDB will automatically search for the
827 * debugging information file in three places:
828 * - the directory containing the executable file (that is, it
829 * will look for a file named `execdir/debugfile',
830 * - a subdirectory of that directory named `.debug' (that is, the
831 * file `execdir/.debug/debugfile', and
832 * - a subdirectory of the global debug file directory that includes
833 * the executable's full path, and the name from the link (that is,
834 * the file `globaldebugdir/execdir/debugfile', where globaldebugdir
835 * is the global debug file directory, and execdir has been turned
836 * into a relative path)." (from GDB manual)
837 */
838 static BOOL elf_locate_debug_link(struct image_file_map* fmap, const char* filename,
839 const WCHAR* loaded_file, DWORD crc)
840 {
841 static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
842 static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
843 const size_t globalDebugDirLen = sizeof(globalDebugDirW) / sizeof(WCHAR);
844 size_t filename_len;
845 WCHAR* p = NULL;
846 WCHAR* slash;
847 struct image_file_map* fmap_link = NULL;
848
849 fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
850 if (!fmap_link) return FALSE;
851
852 filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
853 p = HeapAlloc(GetProcessHeap(), 0,
854 (globalDebugDirLen + strlenW(loaded_file) + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
855 if (!p) goto found;
856
857 /* we prebuild the string with "execdir" */
858 strcpyW(p, loaded_file);
859 slash = strrchrW(p, '/');
860 if (slash == NULL) slash = p; else slash++;
861
862 /* testing execdir/filename */
863 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
864 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
865
866 /* testing execdir/.debug/filename */
867 memcpy(slash, dotDebugW, sizeof(dotDebugW));
868 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + sizeof(dotDebugW) / sizeof(WCHAR), filename_len);
869 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
870
871 /* testing globaldebugdir/execdir/filename */
872 memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
873 memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
874 slash += globalDebugDirLen;
875 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
876 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
877
878 /* finally testing filename */
879 if (elf_check_debug_link(slash, fmap_link, crc)) goto found;
880
881
882 WARN("Couldn't locate or map %s\n", filename);
883 HeapFree(GetProcessHeap(), 0, p);
884 HeapFree(GetProcessHeap(), 0, fmap_link);
885 return FALSE;
886
887 found:
888 TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
889 HeapFree(GetProcessHeap(), 0, p);
890 fmap->u.elf.alternate = fmap_link;
891 return TRUE;
892 }
893
894 /******************************************************************
895 * elf_debuglink_parse
896 *
897 * Parses a .gnu_debuglink section and loads the debug info from
898 * the external file specified there.
899 */
900 static BOOL elf_debuglink_parse(struct image_file_map* fmap, const struct module* module,
901 const BYTE* debuglink)
902 {
903 /* The content of a debug link section is:
904 * 1/ a NULL terminated string, containing the file name for the
905 * debug info
906 * 2/ padding on 4 byte boundary
907 * 3/ CRC of the linked ELF file
908 */
909 const char* dbg_link = (const char*)debuglink;
910 DWORD crc;
911
912 crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
913 return elf_locate_debug_link(fmap, dbg_link, module->module.LoadedImageName, crc);
914 }
915
916 /******************************************************************
917 * elf_load_debug_info_from_map
918 *
919 * Loads the symbolic information from ELF module which mapping is described
920 * in fmap
921 * the module has been loaded at 'load_offset' address, so symbols' address
922 * relocation is performed.
923 * CRC is checked if fmap->with_crc is TRUE
924 * returns
925 * 0 if the file doesn't contain symbolic info (or this info cannot be
926 * read or parsed)
927 * 1 on success
928 */
929 static BOOL elf_load_debug_info_from_map(struct module* module,
930 struct image_file_map* fmap,
931 struct pool* pool,
932 struct hash_table* ht_symtab)
933 {
934 BOOL ret = FALSE, lret;
935 struct elf_thunk_area thunks[] =
936 {
937 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
938 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
939 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
940 {"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
941 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
942 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
943 {NULL, 0, 0, 0}
944 };
945
946 module->module.SymType = SymExport;
947
948 /* create a hash table for the symtab */
949 elf_hash_symtab(module, pool, ht_symtab, fmap, thunks);
950
951 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
952 {
953 struct image_section_map stab_sect, stabstr_sect;
954 struct image_section_map debuglink_sect;
955
956 /* if present, add the .gnu_debuglink file as an alternate to current one */
957 if (elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
958 {
959 const BYTE* dbg_link;
960
961 dbg_link = (const BYTE*)image_map_section(&debuglink_sect);
962 if (dbg_link != IMAGE_NO_MAP)
963 {
964 lret = elf_debuglink_parse(fmap, module, dbg_link);
965 if (!lret)
966 WARN("Couldn't load linked debug file for %s\n",
967 debugstr_w(module->module.ModuleName));
968 ret = ret || lret;
969 }
970 image_unmap_section(&debuglink_sect);
971 }
972 if (elf_find_section(fmap, ".stab", SHT_NULL, &stab_sect) &&
973 elf_find_section(fmap, ".stabstr", SHT_NULL, &stabstr_sect))
974 {
975 const char* stab;
976 const char* stabstr;
977
978 stab = image_map_section(&stab_sect);
979 stabstr = image_map_section(&stabstr_sect);
980 if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
981 {
982 /* OK, now just parse all of the stabs. */
983 lret = stabs_parse(module, module->format_info[DFI_ELF]->u.elf_info->elf_addr,
984 stab, image_get_map_size(&stab_sect),
985 stabstr, image_get_map_size(&stabstr_sect),
986 NULL, NULL);
987 if (lret)
988 /* and fill in the missing information for stabs */
989 elf_finish_stabs_info(module, ht_symtab);
990 else
991 WARN("Couldn't correctly read stabs\n");
992 ret = ret || lret;
993 }
994 image_unmap_section(&stab_sect);
995 image_unmap_section(&stabstr_sect);
996 }
997 lret = dwarf2_parse(module, module->reloc_delta, thunks, fmap);
998 ret = ret || lret;
999 }
1000 if (strstrW(module->module.ModuleName, S_ElfW) ||
1001 !strcmpW(module->module.ModuleName, S_WineLoaderW))
1002 {
1003 /* add the thunks for native libraries */
1004 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1005 elf_new_wine_thunks(module, ht_symtab, thunks);
1006 }
1007 /* add all the public symbols from symtab */
1008 if (elf_new_public_symbols(module, ht_symtab) && !ret) ret = TRUE;
1009
1010 return ret;
1011 }
1012
1013 /******************************************************************
1014 * elf_load_debug_info
1015 *
1016 * Loads ELF debugging information from the module image file.
1017 */
1018 BOOL elf_load_debug_info(struct module* module)
1019 {
1020 BOOL ret = TRUE;
1021 struct pool pool;
1022 struct hash_table ht_symtab;
1023 struct module_format* modfmt;
1024
1025 if (module->type != DMT_ELF || !(modfmt = module->format_info[DFI_ELF]) || !modfmt->u.elf_info)
1026 {
1027 ERR("Bad elf module '%s'\n", debugstr_w(module->module.LoadedImageName));
1028 return FALSE;
1029 }
1030
1031 pool_init(&pool, 65536);
1032 hash_table_init(&pool, &ht_symtab, 256);
1033
1034 ret = elf_load_debug_info_from_map(module, &modfmt->u.elf_info->file_map, &pool, &ht_symtab);
1035
1036 pool_destroy(&pool);
1037 return ret;
1038 }
1039
1040 /******************************************************************
1041 * elf_fetch_file_info
1042 *
1043 * Gathers some more information for an ELF module from a given file
1044 */
1045 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1046 DWORD* size, DWORD* checksum)
1047 {
1048 struct image_file_map fmap;
1049
1050 struct elf_map_file_data emfd;
1051
1052 emfd.kind = from_file;
1053 emfd.u.file.filename = name;
1054 if (!elf_map_file(&emfd, &fmap)) return FALSE;
1055 if (base) *base = fmap.u.elf.elf_start;
1056 *size = fmap.u.elf.elf_size;
1057 *checksum = calc_crc32(fmap.u.elf.fd);
1058 elf_unmap_file(&fmap);
1059 return TRUE;
1060 }
1061
1062 static BOOL elf_load_file_from_fmap(struct process* pcs, const WCHAR* filename,
1063 struct image_file_map* fmap, unsigned long load_offset,
1064 unsigned long dyn_addr, struct elf_info* elf_info)
1065 {
1066 BOOL ret = FALSE;
1067
1068 if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
1069 {
1070 struct image_section_map ism;
1071
1072 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1073 {
1074 Elf_Dyn dyn;
1075 char* ptr = (char*)fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1076 unsigned long len;
1077
1078 do
1079 {
1080 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1081 len != sizeof(dyn))
1082 return ret;
1083 if (dyn.d_tag == DT_DEBUG)
1084 {
1085 elf_info->dbg_hdr_addr = dyn.d_un.d_ptr;
1086 if (load_offset == 0 && dyn_addr == 0) /* likely the case */
1087 /* Assume this module (the Wine loader) has been loaded at its preferred address */
1088 dyn_addr = ism.fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1089 break;
1090 }
1091 ptr += sizeof(dyn);
1092 } while (dyn.d_tag != DT_NULL);
1093 if (dyn.d_tag == DT_NULL) return ret;
1094 }
1095 elf_end_find(fmap);
1096 }
1097
1098 if (elf_info->flags & ELF_INFO_MODULE)
1099 {
1100 struct elf_module_info *elf_module_info;
1101 struct module_format* modfmt;
1102 struct image_section_map ism;
1103 unsigned long modbase = load_offset;
1104
1105 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1106 {
1107 unsigned long rva_dyn = elf_get_map_rva(&ism);
1108
1109 TRACE("For module %s, got ELF (start=%lx dyn=%lx), link_map (start=%lx dyn=%lx)\n",
1110 debugstr_w(filename), (unsigned long)fmap->u.elf.elf_start, rva_dyn,
1111 load_offset, dyn_addr);
1112 if (dyn_addr && load_offset + rva_dyn != dyn_addr)
1113 {
1114 WARN("\thave to relocate: %lx\n", dyn_addr - rva_dyn);
1115 modbase = dyn_addr - rva_dyn;
1116 }
1117 } else WARN("For module %s, no .dynamic section\n", debugstr_w(filename));
1118 elf_end_find(fmap);
1119
1120 modfmt = HeapAlloc(GetProcessHeap(), 0,
1121 sizeof(struct module_format) + sizeof(struct elf_module_info));
1122 if (!modfmt) return FALSE;
1123 elf_info->module = module_new(pcs, filename, DMT_ELF, FALSE, modbase,
1124 fmap->u.elf.elf_size, 0, calc_crc32(fmap->u.elf.fd));
1125 if (!elf_info->module)
1126 {
1127 HeapFree(GetProcessHeap(), 0, modfmt);
1128 return FALSE;
1129 }
1130 elf_info->module->reloc_delta = elf_info->module->module.BaseOfImage - fmap->u.elf.elf_start;
1131 elf_module_info = (void*)(modfmt + 1);
1132 elf_info->module->format_info[DFI_ELF] = modfmt;
1133 modfmt->module = elf_info->module;
1134 modfmt->remove = elf_module_remove;
1135 modfmt->loc_compute = NULL;
1136 modfmt->u.elf_info = elf_module_info;
1137
1138 elf_module_info->elf_addr = load_offset;
1139
1140 elf_module_info->file_map = *fmap;
1141 elf_reset_file_map(fmap);
1142 if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
1143 {
1144 elf_info->module->module.SymType = SymDeferred;
1145 ret = TRUE;
1146 }
1147 else ret = elf_load_debug_info(elf_info->module);
1148
1149 elf_module_info->elf_mark = 1;
1150 elf_module_info->elf_loader = 0;
1151 } else ret = TRUE;
1152
1153 if (elf_info->flags & ELF_INFO_NAME)
1154 {
1155 WCHAR* ptr;
1156 ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1) * sizeof(WCHAR));
1157 if (ptr)
1158 {
1159 strcpyW(ptr, filename);
1160 elf_info->module_name = ptr;
1161 }
1162 else ret = FALSE;
1163 }
1164
1165 return ret;
1166 }
1167
1168 /******************************************************************
1169 * elf_load_file
1170 *
1171 * Loads the information for ELF module stored in 'filename'
1172 * the module has been loaded at 'load_offset' address
1173 * returns
1174 * -1 if the file cannot be found/opened
1175 * 0 if the file doesn't contain symbolic info (or this info cannot be
1176 * read or parsed)
1177 * 1 on success
1178 */
1179 static BOOL elf_load_file(struct process* pcs, const WCHAR* filename,
1180 unsigned long load_offset, unsigned long dyn_addr,
1181 struct elf_info* elf_info)
1182 {
1183 BOOL ret = FALSE;
1184 struct image_file_map fmap;
1185 struct elf_map_file_data emfd;
1186
1187 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename), load_offset);
1188
1189 emfd.kind = from_file;
1190 emfd.u.file.filename = filename;
1191 if (!elf_map_file(&emfd, &fmap)) return ret;
1192
1193 /* Next, we need to find a few of the internal ELF headers within
1194 * this thing. We need the main executable header, and the section
1195 * table.
1196 */
1197 if (!fmap.u.elf.elf_start && !load_offset)
1198 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1199 debugstr_w(filename));
1200
1201 ret = elf_load_file_from_fmap(pcs, filename, &fmap, load_offset, dyn_addr, elf_info);
1202
1203 elf_unmap_file(&fmap);
1204
1205 return ret;
1206 }
1207
1208 /******************************************************************
1209 * elf_load_file_from_path
1210 * tries to load an ELF file from a set of paths (separated by ':')
1211 */
1212 static BOOL elf_load_file_from_path(HANDLE hProcess,
1213 const WCHAR* filename,
1214 unsigned long load_offset,
1215 unsigned long dyn_addr,
1216 const char* path,
1217 struct elf_info* elf_info)
1218 {
1219 BOOL ret = FALSE;
1220 WCHAR *s, *t, *fn;
1221 WCHAR* pathW = NULL;
1222 unsigned len;
1223
1224 if (!path) return FALSE;
1225
1226 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1227 pathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
1228 if (!pathW) return FALSE;
1229 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, pathW, len);
1230
1231 for (s = pathW; s && *s; s = (t) ? (t+1) : NULL)
1232 {
1233 t = strchrW(s, ':');
1234 if (t) *t = '\0';
1235 fn = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1 + lstrlenW(s) + 1) * sizeof(WCHAR));
1236 if (!fn) break;
1237 strcpyW(fn, s);
1238 strcatW(fn, S_SlashW);
1239 strcatW(fn, filename);
1240 ret = elf_load_file(hProcess, fn, load_offset, dyn_addr, elf_info);
1241 HeapFree(GetProcessHeap(), 0, fn);
1242 if (ret) break;
1243 }
1244
1245 HeapFree(GetProcessHeap(), 0, pathW);
1246 return ret;
1247 }
1248
1249 /******************************************************************
1250 * elf_load_file_from_dll_path
1251 *
1252 * Tries to load an ELF file from the dll path
1253 */
1254 static BOOL elf_load_file_from_dll_path(HANDLE hProcess,
1255 const WCHAR* filename,
1256 unsigned long load_offset,
1257 unsigned long dyn_addr,
1258 struct elf_info* elf_info)
1259 {
1260 BOOL ret = FALSE;
1261 unsigned int index = 0;
1262 const char *path;
1263
1264 while (!ret && (path = wine_dll_enum_load_path( index++ )))
1265 {
1266 WCHAR *name;
1267 unsigned len;
1268
1269 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1270
1271 name = HeapAlloc( GetProcessHeap(), 0,
1272 (len + lstrlenW(filename) + 2) * sizeof(WCHAR) );
1273
1274 if (!name) break;
1275 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, name, len);
1276 strcatW( name, S_SlashW );
1277 strcatW( name, filename );
1278 ret = elf_load_file(hProcess, name, load_offset, dyn_addr, elf_info);
1279 HeapFree( GetProcessHeap(), 0, name );
1280 }
1281 return ret;
1282 }
1283
1284 #ifdef AT_SYSINFO_EHDR
1285 /******************************************************************
1286 * elf_search_auxv
1287 *
1288 * locate some a value from the debuggee auxiliary vector
1289 */
1290 static BOOL elf_search_auxv(const struct process* pcs, unsigned type, unsigned long* val)
1291 {
1292 char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
1293 SYMBOL_INFO*si = (SYMBOL_INFO*)buffer;
1294 void* addr;
1295 void* str;
1296 void* str_max;
1297 Elf_auxv_t auxv;
1298
1299 si->SizeOfStruct = sizeof(*si);
1300 si->MaxNameLen = MAX_SYM_NAME;
1301 if (!SymFromName(pcs->handle, "libwine.so.1!__wine_main_environ", si) ||
1302 !(addr = (void*)(DWORD_PTR)si->Address) ||
1303 !ReadProcessMemory(pcs->handle, addr, &addr, sizeof(addr), NULL) ||
1304 !addr)
1305 {
1306 FIXME("can't find symbol in module\n");
1307 return FALSE;
1308 }
1309 /* walk through envp[] */
1310 /* envp[] strings are located after the auxiliary vector, so protect the walk */
1311 str_max = (void*)(DWORD_PTR)~0L;
1312 while (ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) &&
1313 (addr = (void*)((DWORD_PTR)addr + sizeof(str))) != NULL && str != NULL)
1314 str_max = min(str_max, str);
1315
1316 /* Walk through the end of envp[] array.
1317 * Actually, there can be several NULLs at the end of envp[]. This happens when an env variable is
1318 * deleted, the last entry is replaced by an extra NULL.
1319 */
1320 while (addr < str_max && ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) && str == NULL)
1321 addr = (void*)((DWORD_PTR)addr + sizeof(str));
1322
1323 while (ReadProcessMemory(pcs->handle, addr, &auxv, sizeof(auxv), NULL) && auxv.a_type != AT_NULL)
1324 {
1325 if (auxv.a_type == type)
1326 {
1327 *val = auxv.a_un.a_val;
1328 return TRUE;
1329 }
1330 addr = (void*)((DWORD_PTR)addr + sizeof(auxv));
1331 }
1332
1333 return FALSE;
1334 }
1335 #endif
1336
1337 /******************************************************************
1338 * elf_search_and_load_file
1339 *
1340 * lookup a file in standard ELF locations, and if found, load it
1341 */
1342 static BOOL elf_search_and_load_file(struct process* pcs, const WCHAR* filename,
1343 unsigned long load_offset, unsigned long dyn_addr,
1344 struct elf_info* elf_info)
1345 {
1346 BOOL ret = FALSE;
1347 struct module* module;
1348 static WCHAR S_libstdcPPW[] = {'l','i','b','s','t','d','c','+','+','\0'};
1349
1350 if (filename == NULL || *filename == '\0') return FALSE;
1351 if ((module = module_is_already_loaded(pcs, filename)))
1352 {
1353 elf_info->module = module;
1354 elf_info->module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1355 return module->module.SymType;
1356 }
1357
1358 if (strstrW(filename, S_libstdcPPW)) return FALSE; /* We know we can't do it */
1359 ret = elf_load_file(pcs, filename, load_offset, dyn_addr, elf_info);
1360 /* if relative pathname, try some absolute base dirs */
1361 if (!ret && !strchrW(filename, '/'))
1362 {
1363 ret = elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1364 getenv("PATH"), elf_info) ||
1365 elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1366 getenv("LD_LIBRARY_PATH"), elf_info);
1367 if (!ret) ret = elf_load_file_from_dll_path(pcs, filename,
1368 load_offset, dyn_addr, elf_info);
1369 }
1370
1371 return ret;
1372 }
1373
1374 typedef BOOL (*enum_elf_modules_cb)(const WCHAR*, unsigned long load_addr,
1375 unsigned long dyn_addr, BOOL is_system, void* user);
1376
1377 /******************************************************************
1378 * elf_enum_modules_internal
1379 *
1380 * Enumerate ELF modules from a running process
1381 */
1382 static BOOL elf_enum_modules_internal(const struct process* pcs,
1383 const WCHAR* main_name,
1384 enum_elf_modules_cb cb, void* user)
1385 {
1386 struct r_debug dbg_hdr;
1387 void* lm_addr;
1388 struct link_map lm;
1389 char bufstr[256];
1390 WCHAR bufstrW[MAX_PATH];
1391
1392 if (!pcs->dbg_hdr_addr ||
1393 !ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr,
1394 &dbg_hdr, sizeof(dbg_hdr), NULL))
1395 return FALSE;
1396
1397 /* Now walk the linked list. In all known ELF implementations,
1398 * the dynamic loader maintains this linked list for us. In some
1399 * cases the first entry doesn't appear with a name, in other cases it
1400 * does.
1401 */
1402 for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
1403 {
1404 if (!ReadProcessMemory(pcs->handle, lm_addr, &lm, sizeof(lm), NULL))
1405 return FALSE;
1406
1407 if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
1408 lm.l_name != NULL &&
1409 ReadProcessMemory(pcs->handle, lm.l_name, bufstr, sizeof(bufstr), NULL))
1410 {
1411 bufstr[sizeof(bufstr) - 1] = '\0';
1412 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, sizeof(bufstrW) / sizeof(WCHAR));
1413 if (main_name && !bufstrW[0]) strcpyW(bufstrW, main_name);
1414 if (!cb(bufstrW, (unsigned long)lm.l_addr, (unsigned long)lm.l_ld, FALSE, user)) break;
1415 }
1416 }
1417
1418 #ifdef AT_SYSINFO_EHDR
1419 if (!lm_addr)
1420 {
1421 unsigned long ehdr_addr;
1422
1423 if (elf_search_auxv(pcs, AT_SYSINFO_EHDR, &ehdr_addr))
1424 {
1425 static const WCHAR vdsoW[] = {'[','v','d','s','o',']','.','s','o',0};
1426 cb(vdsoW, ehdr_addr, 0, TRUE, user);
1427 }
1428 }
1429 #endif
1430 return TRUE;
1431 }
1432
1433 /******************************************************************
1434 * elf_search_loader
1435 *
1436 * Lookup in a running ELF process the loader, and sets its ELF link
1437 * address (for accessing the list of loaded .so libs) in pcs.
1438 * If flags is ELF_INFO_MODULE, the module for the loader is also
1439 * added as a module into pcs.
1440 */
1441 static BOOL elf_search_loader(struct process* pcs, struct elf_info* elf_info)
1442 {
1443 return elf_search_and_load_file(pcs, get_wine_loader_name(), 0, 0, elf_info);
1444 }
1445
1446 /******************************************************************
1447 * elf_read_wine_loader_dbg_info
1448 *
1449 * Try to find a decent wine executable which could have loaded the debuggee
1450 */
1451 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1452 {
1453 struct elf_info elf_info;
1454
1455 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
1456 if (!elf_search_loader(pcs, &elf_info)) return FALSE;
1457 elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_loader = 1;
1458 module_set_module(elf_info.module, S_WineLoaderW);
1459 return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
1460 }
1461
1462 struct elf_enum_user
1463 {
1464 enum_modules_cb cb;
1465 void* user;
1466 };
1467
1468 static BOOL elf_enum_modules_translate(const WCHAR* name, unsigned long load_addr,
1469 unsigned long dyn_addr, BOOL is_system, void* user)
1470 {
1471 struct elf_enum_user* eeu = user;
1472 return eeu->cb(name, load_addr, eeu->user);
1473 }
1474
1475 /******************************************************************
1476 * elf_enum_modules
1477 *
1478 * Enumerates the ELF loaded modules from a running target (hProc)
1479 * This function doesn't require that someone has called SymInitialize
1480 * on this very process.
1481 */
1482 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1483 {
1484 struct process pcs;
1485 struct elf_info elf_info;
1486 BOOL ret;
1487 struct elf_enum_user eeu;
1488
1489 memset(&pcs, 0, sizeof(pcs));
1490 pcs.handle = hProc;
1491 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_NAME;
1492 if (!elf_search_loader(&pcs, &elf_info)) return FALSE;
1493 pcs.dbg_hdr_addr = elf_info.dbg_hdr_addr;
1494 eeu.cb = cb;
1495 eeu.user = user;
1496 ret = elf_enum_modules_internal(&pcs, elf_info.module_name, elf_enum_modules_translate, &eeu);
1497 HeapFree(GetProcessHeap(), 0, (char*)elf_info.module_name);
1498 return ret;
1499 }
1500
1501 struct elf_load
1502 {
1503 struct process* pcs;
1504 struct elf_info elf_info;
1505 const WCHAR* name;
1506 BOOL ret;
1507 };
1508
1509 /******************************************************************
1510 * elf_load_cb
1511 *
1512 * Callback for elf_load_module, used to walk the list of loaded
1513 * modules.
1514 */
1515 static BOOL elf_load_cb(const WCHAR* name, unsigned long load_addr,
1516 unsigned long dyn_addr, BOOL is_system, void* user)
1517 {
1518 struct elf_load* el = user;
1519 BOOL ret = TRUE;
1520 const WCHAR* p;
1521
1522 if (is_system) /* virtual ELF module, created by system. handle it from memory */
1523 {
1524 struct module* module;
1525 struct elf_map_file_data emfd;
1526 struct image_file_map fmap;
1527
1528 if ((module = module_is_already_loaded(el->pcs, name)))
1529 {
1530 el->elf_info.module = module;
1531 el->elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1532 return module->module.SymType;
1533 }
1534
1535 emfd.kind = from_process;
1536 emfd.u.process.handle = el->pcs->handle;
1537 emfd.u.process.load_addr = (void*)load_addr;
1538
1539 if (elf_map_file(&emfd, &fmap))
1540 el->ret = elf_load_file_from_fmap(el->pcs, name, &fmap, load_addr, 0, &el->elf_info);
1541 return TRUE;
1542 }
1543 if (el->name)
1544 {
1545 /* memcmp is needed for matches when bufstr contains also version information
1546 * el->name: libc.so, name: libc.so.6.0
1547 */
1548 p = strrchrW(name, '/');
1549 if (!p++) p = name;
1550 }
1551
1552 if (!el->name || !memcmp(p, el->name, lstrlenW(el->name) * sizeof(WCHAR)))
1553 {
1554 el->ret = elf_search_and_load_file(el->pcs, name, load_addr, dyn_addr, &el->elf_info);
1555 if (el->name) ret = FALSE;
1556 }
1557
1558 return ret;
1559 }
1560
1561 /******************************************************************
1562 * elf_load_module
1563 *
1564 * loads an ELF module and stores it in process' module list
1565 * Also, find module real name and load address from
1566 * the real loaded modules list in pcs address space
1567 */
1568 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1569 {
1570 struct elf_load el;
1571
1572 TRACE("(%p %s %08lx)\n", pcs, debugstr_w(name), addr);
1573
1574 el.elf_info.flags = ELF_INFO_MODULE;
1575 el.ret = FALSE;
1576
1577 if (pcs->dbg_hdr_addr) /* we're debugging a life target */
1578 {
1579 el.pcs = pcs;
1580 /* do only the lookup from the filename, not the path (as we lookup module
1581 * name in the process' loaded module list)
1582 */
1583 el.name = strrchrW(name, '/');
1584 if (!el.name++) el.name = name;
1585 el.ret = FALSE;
1586
1587 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1588 return NULL;
1589 }
1590 else if (addr)
1591 {
1592 el.name = name;
1593 el.ret = elf_search_and_load_file(pcs, el.name, addr, 0, &el.elf_info);
1594 }
1595 if (!el.ret) return NULL;
1596 assert(el.elf_info.module);
1597 return el.elf_info.module;
1598 }
1599
1600 /******************************************************************
1601 * elf_synchronize_module_list
1602 *
1603 * this functions rescans the debuggee module's list and synchronizes it with
1604 * the one from 'pcs', ie:
1605 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1606 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1607 */
1608 BOOL elf_synchronize_module_list(struct process* pcs)
1609 {
1610 struct module* module;
1611 struct elf_load el;
1612
1613 for (module = pcs->lmodules; module; module = module->next)
1614 {
1615 if (module->type == DMT_ELF && !module->is_virtual)
1616 module->format_info[DFI_ELF]->u.elf_info->elf_mark = 0;
1617 }
1618
1619 el.pcs = pcs;
1620 el.elf_info.flags = ELF_INFO_MODULE;
1621 el.ret = FALSE;
1622 el.name = NULL; /* fetch all modules */
1623
1624 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1625 return FALSE;
1626
1627 module = pcs->lmodules;
1628 while (module)
1629 {
1630 if (module->type == DMT_ELF && !module->is_virtual)
1631 {
1632 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
1633
1634 if (!elf_info->elf_mark && !elf_info->elf_loader)
1635 {
1636 module_remove(pcs, module);
1637 /* restart all over */
1638 module = pcs->lmodules;
1639 continue;
1640 }
1641 }
1642 module = module->next;
1643 }
1644 return TRUE;
1645 }
1646
1647 #else /* !__ELF__ */
1648
1649 BOOL elf_find_section(struct image_file_map* fmap, const char* name,
1650 unsigned sht, struct image_section_map* ism)
1651 {
1652 return FALSE;
1653 }
1654
1655 const char* elf_map_section(struct image_section_map* ism)
1656 {
1657 return NULL;
1658 }
1659
1660 void elf_unmap_section(struct image_section_map* ism)
1661 {}
1662
1663 unsigned elf_get_map_size(const struct image_section_map* ism)
1664 {
1665 return 0;
1666 }
1667
1668 DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
1669 {
1670 return 0;
1671 }
1672
1673 BOOL elf_synchronize_module_list(struct process* pcs)
1674 {
1675 return FALSE;
1676 }
1677
1678 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1679 DWORD* size, DWORD* checksum)
1680 {
1681 return FALSE;
1682 }
1683
1684 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1685 {
1686 return FALSE;
1687 }
1688
1689 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1690 {
1691 return FALSE;
1692 }
1693
1694 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1695 {
1696 return NULL;
1697 }
1698
1699 BOOL elf_load_debug_info(struct module* module)
1700 {
1701 return FALSE;
1702 }
1703
1704 int elf_is_in_thunk_area(unsigned long addr,
1705 const struct elf_thunk_area* thunks)
1706 {
1707 return -1;
1708 }
1709 #endif /* __ELF__ */
Windows API implementation