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dbghelp: Make ehdr_addr in elf_enum_modules_internal dependent on AT_SYSINFO_EHDR.
[wine.git] / dlls / dbghelp / elf_module.c
blobff8b9d2137e1a951a38c8f6c752b067b3373d96a
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: assert(0);
265 }
266 }
267
268 /******************************************************************
269 * elf_map_file
270 *
271 * Maps an ELF file into memory (and checks it's a real ELF file)
272 */
273 static BOOL elf_map_file(struct elf_map_file_data* emfd, struct image_file_map* fmap)
274 {
275 static const BYTE elf_signature[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
276 struct stat statbuf;
277 int i;
278 Elf_Phdr phdr;
279 unsigned long tmp, page_mask = getpagesize() - 1;
280 char* filename;
281 unsigned len;
282 BOOL ret = FALSE;
283
284 switch (emfd->kind)
285 {
286 case from_file:
287 len = WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, NULL, 0, NULL, NULL);
288 if (!(filename = HeapAlloc(GetProcessHeap(), 0, len))) return FALSE;
289 WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, filename, len, NULL, NULL);
290 break;
291 case from_process:
292 filename = NULL;
293 break;
294 default: assert(0);
295 }
296
297 elf_reset_file_map(fmap);
298
299 fmap->modtype = DMT_ELF;
300 fmap->u.elf.fd = -1;
301 fmap->u.elf.target_copy = NULL;
302
303 switch (emfd->kind)
304 {
305 case from_file:
306 /* check that the file exists, and that the module hasn't been loaded yet */
307 if (stat(filename, &statbuf) == -1 || S_ISDIR(statbuf.st_mode)) goto done;
308
309 /* Now open the file, so that we can mmap() it. */
310 if ((fmap->u.elf.fd = open(filename, O_RDONLY)) == -1) goto done;
311 break;
312 case from_process:
313 break;
314 }
315 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr, sizeof(fmap->u.elf.elfhdr), 0))
316 goto done;
317
318 /* and check for an ELF header */
319 if (memcmp(fmap->u.elf.elfhdr.e_ident,
320 elf_signature, sizeof(elf_signature))) goto done;
321 /* and check 32 vs 64 size according to current machine */
322 #ifdef _WIN64
323 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS64) goto done;
324 #else
325 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS32) goto done;
326 #endif
327 fmap->u.elf.sect = HeapAlloc(GetProcessHeap(), 0,
328 fmap->u.elf.elfhdr.e_shnum * sizeof(fmap->u.elf.sect[0]));
329 if (!fmap->u.elf.sect) goto done;
330
331 for (i = 0; i < fmap->u.elf.elfhdr.e_shnum; i++)
332 {
333 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.sect[i].shdr, sizeof(fmap->u.elf.sect[i].shdr),
334 fmap->u.elf.elfhdr.e_shoff + i * sizeof(fmap->u.elf.sect[i].shdr)))
335 {
336 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
337 fmap->u.elf.sect = NULL;
338 goto done;
339 }
340 fmap->u.elf.sect[i].mapped = IMAGE_NO_MAP;
341 }
342
343 /* grab size of module once loaded in memory */
344 fmap->u.elf.elf_size = 0;
345 fmap->u.elf.elf_start = ~0L;
346 for (i = 0; i < fmap->u.elf.elfhdr.e_phnum; i++)
347 {
348 if (elf_map_file_read(fmap, emfd, &phdr, sizeof(phdr),
349 fmap->u.elf.elfhdr.e_phoff + i * sizeof(phdr)) &&
350 phdr.p_type == PT_LOAD)
351 {
352 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
353 if (fmap->u.elf.elf_size < tmp) fmap->u.elf.elf_size = tmp;
354 if (phdr.p_vaddr < fmap->u.elf.elf_start) fmap->u.elf.elf_start = phdr.p_vaddr;
355 }
356 }
357 /* if non relocatable ELF, then remove fixed address from computation
358 * otherwise, all addresses are zero based and start has no effect
359 */
360 fmap->u.elf.elf_size -= fmap->u.elf.elf_start;
361
362 switch (emfd->kind)
363 {
364 case from_file: break;
365 case from_process:
366 if (!(fmap->u.elf.target_copy = HeapAlloc(GetProcessHeap(), 0, fmap->u.elf.elf_size)))
367 {
368 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
369 goto done;
370 }
371 if (!ReadProcessMemory(emfd->u.process.handle, emfd->u.process.load_addr, fmap->u.elf.target_copy,
372 fmap->u.elf.elf_size, NULL))
373 {
374 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
375 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
376 goto done;
377 }
378 break;
379 }
380 ret = TRUE;
381 done:
382 HeapFree(GetProcessHeap(), 0, filename);
383 return ret;
384 }
385
386 /******************************************************************
387 * elf_unmap_file
388 *
389 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
390 */
391 static void elf_unmap_file(struct image_file_map* fmap)
392 {
393 while (fmap)
394 {
395 if (fmap->u.elf.fd != -1)
396 {
397 struct image_section_map ism;
398 ism.fmap = fmap;
399 for (ism.sidx = 0; ism.sidx < fmap->u.elf.elfhdr.e_shnum; ism.sidx++)
400 {
401 elf_unmap_section(&ism);
402 }
403 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
404 close(fmap->u.elf.fd);
405 }
406 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
407 fmap = fmap->u.elf.alternate;
408 }
409 }
410
411 static void elf_module_remove(struct process* pcs, struct module_format* modfmt)
412 {
413 elf_unmap_file(&modfmt->u.elf_info->file_map);
414 HeapFree(GetProcessHeap(), 0, modfmt);
415 }
416
417 /******************************************************************
418 * elf_is_in_thunk_area
419 *
420 * Check whether an address lies within one of the thunk area we
421 * know of.
422 */
423 int elf_is_in_thunk_area(unsigned long addr,
424 const struct elf_thunk_area* thunks)
425 {
426 unsigned i;
427
428 if (thunks) for (i = 0; thunks[i].symname; i++)
429 {
430 if (addr >= thunks[i].rva_start && addr < thunks[i].rva_end)
431 return i;
432 }
433 return -1;
434 }
435
436 /******************************************************************
437 * elf_hash_symtab
438 *
439 * creating an internal hash table to ease use ELF symtab information lookup
440 */
441 static void elf_hash_symtab(struct module* module, struct pool* pool,
442 struct hash_table* ht_symtab, struct image_file_map* fmap,
443 struct elf_thunk_area* thunks)
444 {
445 int i, j, nsym;
446 const char* strp;
447 const char* symname;
448 struct symt_compiland* compiland = NULL;
449 const char* ptr;
450 const Elf_Sym* symp;
451 struct symtab_elt* ste;
452 struct image_section_map ism, ism_str;
453
454 if (!elf_find_section(fmap, ".symtab", SHT_SYMTAB, &ism) &&
455 !elf_find_section(fmap, ".dynsym", SHT_DYNSYM, &ism)) return;
456 if ((symp = (const Elf_Sym*)image_map_section(&ism)) == IMAGE_NO_MAP) return;
457 ism_str.fmap = ism.fmap;
458 ism_str.sidx = fmap->u.elf.sect[ism.sidx].shdr.sh_link;
459 if ((strp = image_map_section(&ism_str)) == IMAGE_NO_MAP)
460 {
461 image_unmap_section(&ism);
462 return;
463 }
464
465 nsym = image_get_map_size(&ism) / sizeof(*symp);
466
467 for (j = 0; thunks[j].symname; j++)
468 thunks[j].rva_start = thunks[j].rva_end = 0;
469
470 for (i = 0; i < nsym; i++, symp++)
471 {
472 /* Ignore certain types of entries which really aren't of that much
473 * interest.
474 */
475 if ((ELF32_ST_TYPE(symp->st_info) != STT_NOTYPE &&
476 ELF32_ST_TYPE(symp->st_info) != STT_FILE &&
477 ELF32_ST_TYPE(symp->st_info) != STT_OBJECT &&
478 ELF32_ST_TYPE(symp->st_info) != STT_FUNC) ||
479 symp->st_shndx == SHN_UNDEF)
480 {
481 continue;
482 }
483
484 symname = strp + symp->st_name;
485
486 /* handle some specific symtab (that we'll throw away when done) */
487 switch (ELF32_ST_TYPE(symp->st_info))
488 {
489 case STT_FILE:
490 if (symname)
491 compiland = symt_new_compiland(module, symp->st_value,
492 source_new(module, NULL, symname));
493 else
494 compiland = NULL;
495 continue;
496 case STT_NOTYPE:
497 /* we are only interested in wine markers inserted by winebuild */
498 for (j = 0; thunks[j].symname; j++)
499 {
500 if (!strcmp(symname, thunks[j].symname))
501 {
502 thunks[j].rva_start = symp->st_value;
503 thunks[j].rva_end = symp->st_value + symp->st_size;
504 break;
505 }
506 }
507 continue;
508 }
509
510 /* FIXME: we don't need to handle them (GCC internals)
511 * Moreover, they screw up our symbol lookup :-/
512 */
513 if (symname[0] == '.' && symname[1] == 'L' && isdigit(symname[2]))
514 continue;
515
516 ste = pool_alloc(pool, sizeof(*ste));
517 ste->ht_elt.name = symname;
518 /* GCC emits, in some cases, a .<digit>+ suffix.
519 * This is used for static variable inside functions, so
520 * that we can have several such variables with same name in
521 * the same compilation unit
522 * We simply ignore that suffix when present (we also get rid
523 * of it in stabs parsing)
524 */
525 ptr = symname + strlen(symname) - 1;
526 if (isdigit(*ptr))
527 {
528 while (isdigit(*ptr) && ptr >= symname) ptr--;
529 if (ptr > symname && *ptr == '.')
530 {
531 char* n = pool_alloc(pool, ptr - symname + 1);
532 memcpy(n, symname, ptr - symname + 1);
533 n[ptr - symname] = '\0';
534 ste->ht_elt.name = n;
535 }
536 }
537 ste->symp = symp;
538 ste->compiland = compiland;
539 ste->used = 0;
540 hash_table_add(ht_symtab, &ste->ht_elt);
541 }
542 /* as we added in the ht_symtab pointers to the symbols themselves,
543 * we cannot unmap yet the sections, it will be done when we're over
544 * with this ELF file
545 */
546 }
547
548 /******************************************************************
549 * elf_lookup_symtab
550 *
551 * lookup a symbol by name in our internal hash table for the symtab
552 */
553 static const Elf_Sym* elf_lookup_symtab(const struct module* module,
554 const struct hash_table* ht_symtab,
555 const char* name, const struct symt* compiland)
556 {
557 struct symtab_elt* weak_result = NULL; /* without compiland name */
558 struct symtab_elt* result = NULL;
559 struct hash_table_iter hti;
560 struct symtab_elt* ste;
561 const char* compiland_name;
562 const char* compiland_basename;
563 const char* base;
564
565 /* we need weak match up (at least) when symbols of same name,
566 * defined several times in different compilation units,
567 * are merged in a single one (hence a different filename for c.u.)
568 */
569 if (compiland)
570 {
571 compiland_name = source_get(module,
572 ((const struct symt_compiland*)compiland)->source);
573 compiland_basename = strrchr(compiland_name, '/');
574 if (!compiland_basename++) compiland_basename = compiland_name;
575 }
576 else compiland_name = compiland_basename = NULL;
577
578 hash_table_iter_init(ht_symtab, &hti, name);
579 while ((ste = hash_table_iter_up(&hti)))
580 {
581 if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
582
583 weak_result = ste;
584 if ((ste->compiland && !compiland_name) || (!ste->compiland && compiland_name))
585 continue;
586 if (ste->compiland && compiland_name)
587 {
588 const char* filename = source_get(module, ste->compiland->source);
589 if (strcmp(filename, compiland_name))
590 {
591 base = strrchr(filename, '/');
592 if (!base++) base = filename;
593 if (strcmp(base, compiland_basename)) continue;
594 }
595 }
596 if (result)
597 {
598 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
599 name, compiland_name,
600 source_get(module, result->compiland->source), (unsigned int)result->symp->st_value,
601 source_get(module, ste->compiland->source), (unsigned int)ste->symp->st_value);
602 }
603 else
604 {
605 result = ste;
606 ste->used = 1;
607 }
608 }
609 if (!result && !(result = weak_result))
610 {
611 FIXME("Couldn't find symbol %s!%s in symtab\n",
612 debugstr_w(module->module.ModuleName), name);
613 return NULL;
614 }
615 return result->symp;
616 }
617
618 /******************************************************************
619 * elf_finish_stabs_info
620 *
621 * - get any relevant information (address & size) from the bits we got from the
622 * stabs debugging information
623 */
624 static void elf_finish_stabs_info(struct module* module, const struct hash_table* symtab)
625 {
626 struct hash_table_iter hti;
627 void* ptr;
628 struct symt_ht* sym;
629 const Elf_Sym* symp;
630 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
631
632 hash_table_iter_init(&module->ht_symbols, &hti, NULL);
633 while ((ptr = hash_table_iter_up(&hti)))
634 {
635 sym = GET_ENTRY(ptr, struct symt_ht, hash_elt);
636 switch (sym->symt.tag)
637 {
638 case SymTagFunction:
639 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
640 ((struct symt_function*)sym)->size)
641 {
642 break;
643 }
644 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
645 ((struct symt_function*)sym)->container);
646 if (symp)
647 {
648 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
649 ((struct symt_function*)sym)->address != elf_info->elf_addr + symp->st_value)
650 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
651 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
652 ((struct symt_function*)sym)->address, elf_info->elf_addr + symp->st_value);
653 if (((struct symt_function*)sym)->size && ((struct symt_function*)sym)->size != symp->st_size)
654 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
655 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
656 ((struct symt_function*)sym)->size, (unsigned int)symp->st_size);
657
658 ((struct symt_function*)sym)->address = elf_info->elf_addr + symp->st_value;
659 ((struct symt_function*)sym)->size = symp->st_size;
660 } else
661 FIXME("Couldn't find %s!%s\n",
662 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
663 break;
664 case SymTagData:
665 switch (((struct symt_data*)sym)->kind)
666 {
667 case DataIsGlobal:
668 case DataIsFileStatic:
669 if (((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr)
670 break;
671 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
672 ((struct symt_data*)sym)->container);
673 if (symp)
674 {
675 if (((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr &&
676 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr + symp->st_value)
677 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
678 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
679 ((struct symt_function*)sym)->address, elf_info->elf_addr + symp->st_value);
680 ((struct symt_data*)sym)->u.var.offset = elf_info->elf_addr + symp->st_value;
681 ((struct symt_data*)sym)->kind = (ELF32_ST_BIND(symp->st_info) == STB_LOCAL) ?
682 DataIsFileStatic : DataIsGlobal;
683 } else
684 FIXME("Couldn't find %s!%s\n",
685 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
686 break;
687 default:;
688 }
689 break;
690 default:
691 FIXME("Unsupported tag %u\n", sym->symt.tag);
692 break;
693 }
694 }
695 /* since we may have changed some addresses & sizes, mark the module to be resorted */
696 module->sortlist_valid = FALSE;
697 }
698
699 /******************************************************************
700 * elf_load_wine_thunks
701 *
702 * creating the thunk objects for a wine native DLL
703 */
704 static int elf_new_wine_thunks(struct module* module, const struct hash_table* ht_symtab,
705 const struct elf_thunk_area* thunks)
706 {
707 int j;
708 struct hash_table_iter hti;
709 struct symtab_elt* ste;
710 DWORD_PTR addr;
711 struct symt_ht* symt;
712
713 hash_table_iter_init(ht_symtab, &hti, NULL);
714 while ((ste = hash_table_iter_up(&hti)))
715 {
716 if (ste->used) continue;
717
718 addr = module->reloc_delta + ste->symp->st_value;
719
720 j = elf_is_in_thunk_area(ste->symp->st_value, thunks);
721 if (j >= 0) /* thunk found */
722 {
723 symt_new_thunk(module, ste->compiland, ste->ht_elt.name, thunks[j].ordinal,
724 addr, ste->symp->st_size);
725 }
726 else
727 {
728 ULONG64 ref_addr;
729
730 symt = symt_find_nearest(module, addr);
731 if (symt && !symt_get_info(module, &symt->symt, TI_GET_ADDRESS, &ref_addr))
732 ref_addr = addr;
733 if (!symt || addr != ref_addr)
734 {
735 /* creating public symbols for all the ELF symbols which haven't been
736 * used yet (ie we have no debug information on them)
737 * That's the case, for example, of the .spec.c files
738 */
739 switch (ELF32_ST_TYPE(ste->symp->st_info))
740 {
741 case STT_FUNC:
742 symt_new_function(module, ste->compiland, ste->ht_elt.name,
743 addr, ste->symp->st_size, NULL);
744 break;
745 case STT_OBJECT:
746 symt_new_global_variable(module, ste->compiland, ste->ht_elt.name,
747 ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL,
748 addr, ste->symp->st_size, NULL);
749 break;
750 default:
751 FIXME("Shouldn't happen\n");
752 break;
753 }
754 /* FIXME: this is a hack !!!
755 * we are adding new symbols, but as we're parsing a symbol table
756 * (hopefully without duplicate symbols) we delay rebuilding the sorted
757 * module table until we're done with the symbol table
758 * Otherwise, as we intertwine symbols's add and lookup, performance
759 * is rather bad
760 */
761 module->sortlist_valid = TRUE;
762 }
763 else if (strcmp(ste->ht_elt.name, symt->hash_elt.name))
764 {
765 ULONG64 xaddr = 0, xsize = 0;
766 DWORD kind = -1;
767
768 symt_get_info(module, &symt->symt, TI_GET_ADDRESS, &xaddr);
769 symt_get_info(module, &symt->symt, TI_GET_LENGTH, &xsize);
770 symt_get_info(module, &symt->symt, TI_GET_DATAKIND, &kind);
771
772 /* If none of symbols has a correct size, we consider they are both markers
773 * Hence, we can silence this warning
774 * Also, we check that we don't have two symbols, one local, the other
775 * global which is legal
776 */
777 if ((xsize || ste->symp->st_size) &&
778 (kind == (ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL) ? DataIsFileStatic : DataIsGlobal))
779 FIXME("Duplicate in %s: %s<%08lx-%08x> %s<%s-%s>\n",
780 debugstr_w(module->module.ModuleName),
781 ste->ht_elt.name, addr, (unsigned int)ste->symp->st_size,
782 symt->hash_elt.name,
783 wine_dbgstr_longlong(xaddr), wine_dbgstr_longlong(xsize));
784 }
785 }
786 }
787 /* see comment above */
788 module->sortlist_valid = FALSE;
789 return TRUE;
790 }
791
792 /******************************************************************
793 * elf_new_public_symbols
794 *
795 * Creates a set of public symbols from an ELF symtab
796 */
797 static int elf_new_public_symbols(struct module* module, const struct hash_table* symtab)
798 {
799 struct hash_table_iter hti;
800 struct symtab_elt* ste;
801
802 if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
803
804 /* FIXME: we're missing the ELF entry point here */
805
806 hash_table_iter_init(symtab, &hti, NULL);
807 while ((ste = hash_table_iter_up(&hti)))
808 {
809 symt_new_public(module, ste->compiland, ste->ht_elt.name,
810 module->reloc_delta + ste->symp->st_value,
811 ste->symp->st_size);
812 }
813 return TRUE;
814 }
815
816 static BOOL elf_check_debug_link(const WCHAR* file, struct image_file_map* fmap, DWORD crc)
817 {
818 BOOL ret;
819 struct elf_map_file_data emfd;
820
821 emfd.kind = from_file;
822 emfd.u.file.filename = file;
823 if (!elf_map_file(&emfd, fmap)) return FALSE;
824 if (!(ret = crc == calc_crc32(fmap->u.elf.fd)))
825 {
826 WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
827 debugstr_w(file), calc_crc32(fmap->u.elf.fd), crc);
828 elf_unmap_file(fmap);
829 }
830 return ret;
831 }
832
833 /******************************************************************
834 * elf_locate_debug_link
835 *
836 * Locate a filename from a .gnu_debuglink section, using the same
837 * strategy as gdb:
838 * "If the full name of the directory containing the executable is
839 * execdir, and the executable has a debug link that specifies the
840 * name debugfile, then GDB will automatically search for the
841 * debugging information file in three places:
842 * - the directory containing the executable file (that is, it
843 * will look for a file named `execdir/debugfile',
844 * - a subdirectory of that directory named `.debug' (that is, the
845 * file `execdir/.debug/debugfile', and
846 * - a subdirectory of the global debug file directory that includes
847 * the executable's full path, and the name from the link (that is,
848 * the file `globaldebugdir/execdir/debugfile', where globaldebugdir
849 * is the global debug file directory, and execdir has been turned
850 * into a relative path)." (from GDB manual)
851 */
852 static BOOL elf_locate_debug_link(struct image_file_map* fmap, const char* filename,
853 const WCHAR* loaded_file, DWORD crc)
854 {
855 static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
856 static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
857 const size_t globalDebugDirLen = sizeof(globalDebugDirW) / sizeof(WCHAR);
858 size_t filename_len;
859 WCHAR* p = NULL;
860 WCHAR* slash;
861 struct image_file_map* fmap_link = NULL;
862
863 fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
864 if (!fmap_link) return FALSE;
865
866 filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
867 p = HeapAlloc(GetProcessHeap(), 0,
868 (globalDebugDirLen + strlenW(loaded_file) + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
869 if (!p) goto found;
870
871 /* we prebuild the string with "execdir" */
872 strcpyW(p, loaded_file);
873 slash = strrchrW(p, '/');
874 if (slash == NULL) slash = p; else slash++;
875
876 /* testing execdir/filename */
877 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
878 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
879
880 /* testing execdir/.debug/filename */
881 memcpy(slash, dotDebugW, sizeof(dotDebugW));
882 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + sizeof(dotDebugW) / sizeof(WCHAR), filename_len);
883 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
884
885 /* testing globaldebugdir/execdir/filename */
886 memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
887 memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
888 slash += globalDebugDirLen;
889 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
890 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
891
892 /* finally testing filename */
893 if (elf_check_debug_link(slash, fmap_link, crc)) goto found;
894
895
896 WARN("Couldn't locate or map %s\n", filename);
897 HeapFree(GetProcessHeap(), 0, p);
898 HeapFree(GetProcessHeap(), 0, fmap_link);
899 return FALSE;
900
901 found:
902 TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
903 HeapFree(GetProcessHeap(), 0, p);
904 fmap->u.elf.alternate = fmap_link;
905 return TRUE;
906 }
907
908 /******************************************************************
909 * elf_debuglink_parse
910 *
911 * Parses a .gnu_debuglink section and loads the debug info from
912 * the external file specified there.
913 */
914 static BOOL elf_debuglink_parse(struct image_file_map* fmap, const struct module* module,
915 const BYTE* debuglink)
916 {
917 /* The content of a debug link section is:
918 * 1/ a NULL terminated string, containing the file name for the
919 * debug info
920 * 2/ padding on 4 byte boundary
921 * 3/ CRC of the linked ELF file
922 */
923 const char* dbg_link = (const char*)debuglink;
924 DWORD crc;
925
926 crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
927 return elf_locate_debug_link(fmap, dbg_link, module->module.LoadedImageName, crc);
928 }
929
930 /******************************************************************
931 * elf_load_debug_info_from_map
932 *
933 * Loads the symbolic information from ELF module which mapping is described
934 * in fmap
935 * the module has been loaded at 'load_offset' address, so symbols' address
936 * relocation is performed.
937 * CRC is checked if fmap->with_crc is TRUE
938 * returns
939 * 0 if the file doesn't contain symbolic info (or this info cannot be
940 * read or parsed)
941 * 1 on success
942 */
943 static BOOL elf_load_debug_info_from_map(struct module* module,
944 struct image_file_map* fmap,
945 struct pool* pool,
946 struct hash_table* ht_symtab)
947 {
948 BOOL ret = FALSE, lret;
949 struct elf_thunk_area thunks[] =
950 {
951 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
952 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
953 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
954 {"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
955 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
956 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
957 {NULL, 0, 0, 0}
958 };
959
960 module->module.SymType = SymExport;
961
962 /* create a hash table for the symtab */
963 elf_hash_symtab(module, pool, ht_symtab, fmap, thunks);
964
965 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
966 {
967 struct image_section_map stab_sect, stabstr_sect;
968 struct image_section_map debuglink_sect;
969
970 /* if present, add the .gnu_debuglink file as an alternate to current one */
971 if (elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
972 {
973 const BYTE* dbg_link;
974
975 dbg_link = (const BYTE*)image_map_section(&debuglink_sect);
976 if (dbg_link != IMAGE_NO_MAP)
977 {
978 lret = elf_debuglink_parse(fmap, module, dbg_link);
979 if (!lret)
980 WARN("Couldn't load linked debug file for %s\n",
981 debugstr_w(module->module.ModuleName));
982 ret = ret || lret;
983 }
984 image_unmap_section(&debuglink_sect);
985 }
986 if (elf_find_section(fmap, ".stab", SHT_NULL, &stab_sect) &&
987 elf_find_section(fmap, ".stabstr", SHT_NULL, &stabstr_sect))
988 {
989 const char* stab;
990 const char* stabstr;
991
992 stab = image_map_section(&stab_sect);
993 stabstr = image_map_section(&stabstr_sect);
994 if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
995 {
996 /* OK, now just parse all of the stabs. */
997 lret = stabs_parse(module, module->format_info[DFI_ELF]->u.elf_info->elf_addr,
998 stab, image_get_map_size(&stab_sect),
999 stabstr, image_get_map_size(&stabstr_sect),
1000 NULL, NULL);
1001 if (lret)
1002 /* and fill in the missing information for stabs */
1003 elf_finish_stabs_info(module, ht_symtab);
1004 else
1005 WARN("Couldn't correctly read stabs\n");
1006 ret = ret || lret;
1007 }
1008 else lret = FALSE;
1009 image_unmap_section(&stab_sect);
1010 image_unmap_section(&stabstr_sect);
1011 }
1012 lret = dwarf2_parse(module, module->reloc_delta, thunks, fmap);
1013 ret = ret || lret;
1014 }
1015 if (strstrW(module->module.ModuleName, S_ElfW) ||
1016 !strcmpW(module->module.ModuleName, S_WineLoaderW))
1017 {
1018 /* add the thunks for native libraries */
1019 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1020 elf_new_wine_thunks(module, ht_symtab, thunks);
1021 }
1022 /* add all the public symbols from symtab */
1023 if (elf_new_public_symbols(module, ht_symtab) && !ret) ret = TRUE;
1024
1025 return ret;
1026 }
1027
1028 /******************************************************************
1029 * elf_load_debug_info
1030 *
1031 * Loads ELF debugging information from the module image file.
1032 */
1033 BOOL elf_load_debug_info(struct module* module)
1034 {
1035 BOOL ret = TRUE;
1036 struct pool pool;
1037 struct hash_table ht_symtab;
1038 struct module_format* modfmt;
1039
1040 if (module->type != DMT_ELF || !(modfmt = module->format_info[DFI_ELF]) || !modfmt->u.elf_info)
1041 {
1042 ERR("Bad elf module '%s'\n", debugstr_w(module->module.LoadedImageName));
1043 return FALSE;
1044 }
1045
1046 pool_init(&pool, 65536);
1047 hash_table_init(&pool, &ht_symtab, 256);
1048
1049 ret = elf_load_debug_info_from_map(module, &modfmt->u.elf_info->file_map, &pool, &ht_symtab);
1050
1051 pool_destroy(&pool);
1052 return ret;
1053 }
1054
1055 /******************************************************************
1056 * elf_fetch_file_info
1057 *
1058 * Gathers some more information for an ELF module from a given file
1059 */
1060 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1061 DWORD* size, DWORD* checksum)
1062 {
1063 struct image_file_map fmap;
1064
1065 struct elf_map_file_data emfd;
1066
1067 emfd.kind = from_file;
1068 emfd.u.file.filename = name;
1069 if (!elf_map_file(&emfd, &fmap)) return FALSE;
1070 if (base) *base = fmap.u.elf.elf_start;
1071 *size = fmap.u.elf.elf_size;
1072 *checksum = calc_crc32(fmap.u.elf.fd);
1073 elf_unmap_file(&fmap);
1074 return TRUE;
1075 }
1076
1077 static BOOL elf_load_file_from_fmap(struct process* pcs, const WCHAR* filename,
1078 struct image_file_map* fmap, unsigned long load_offset,
1079 unsigned long dyn_addr, struct elf_info* elf_info)
1080 {
1081 BOOL ret = FALSE;
1082
1083 if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
1084 {
1085 struct image_section_map ism;
1086
1087 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1088 {
1089 Elf_Dyn dyn;
1090 char* ptr = (char*)fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1091 unsigned long len;
1092
1093 do
1094 {
1095 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1096 len != sizeof(dyn))
1097 return ret;
1098 if (dyn.d_tag == DT_DEBUG)
1099 {
1100 elf_info->dbg_hdr_addr = dyn.d_un.d_ptr;
1101 if (load_offset == 0 && dyn_addr == 0) /* likely the case */
1102 /* Assume this module (the Wine loader) has been loaded at its preferred address */
1103 dyn_addr = ism.fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1104 break;
1105 }
1106 ptr += sizeof(dyn);
1107 } while (dyn.d_tag != DT_NULL);
1108 if (dyn.d_tag == DT_NULL) return ret;
1109 }
1110 elf_end_find(fmap);
1111 }
1112
1113 if (elf_info->flags & ELF_INFO_MODULE)
1114 {
1115 struct elf_module_info *elf_module_info;
1116 struct module_format* modfmt;
1117 struct image_section_map ism;
1118 unsigned long modbase = load_offset;
1119
1120 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1121 {
1122 unsigned long rva_dyn = elf_get_map_rva(&ism);
1123
1124 TRACE("For module %s, got ELF (start=%lx dyn=%lx), link_map (start=%lx dyn=%lx)\n",
1125 debugstr_w(filename), (unsigned long)fmap->u.elf.elf_start, rva_dyn,
1126 load_offset, dyn_addr);
1127 if (dyn_addr && load_offset + rva_dyn != dyn_addr)
1128 {
1129 WARN("\thave to relocate: %lx\n", dyn_addr - rva_dyn);
1130 modbase = dyn_addr - rva_dyn;
1131 }
1132 } else WARN("For module %s, no .dynamic section\n", debugstr_w(filename));
1133 elf_end_find(fmap);
1134
1135 modfmt = HeapAlloc(GetProcessHeap(), 0,
1136 sizeof(struct module_format) + sizeof(struct elf_module_info));
1137 if (!modfmt) return FALSE;
1138 elf_info->module = module_new(pcs, filename, DMT_ELF, FALSE, modbase,
1139 fmap->u.elf.elf_size, 0, calc_crc32(fmap->u.elf.fd));
1140 if (!elf_info->module)
1141 {
1142 HeapFree(GetProcessHeap(), 0, modfmt);
1143 return FALSE;
1144 }
1145 elf_info->module->reloc_delta = elf_info->module->module.BaseOfImage - fmap->u.elf.elf_start;
1146 elf_module_info = (void*)(modfmt + 1);
1147 elf_info->module->format_info[DFI_ELF] = modfmt;
1148 modfmt->module = elf_info->module;
1149 modfmt->remove = elf_module_remove;
1150 modfmt->loc_compute = NULL;
1151 modfmt->u.elf_info = elf_module_info;
1152
1153 elf_module_info->elf_addr = load_offset;
1154
1155 elf_module_info->file_map = *fmap;
1156 elf_reset_file_map(fmap);
1157 if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
1158 {
1159 elf_info->module->module.SymType = SymDeferred;
1160 ret = TRUE;
1161 }
1162 else ret = elf_load_debug_info(elf_info->module);
1163
1164 elf_module_info->elf_mark = 1;
1165 elf_module_info->elf_loader = 0;
1166 } else ret = TRUE;
1167
1168 if (elf_info->flags & ELF_INFO_NAME)
1169 {
1170 WCHAR* ptr;
1171 ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1) * sizeof(WCHAR));
1172 if (ptr)
1173 {
1174 strcpyW(ptr, filename);
1175 elf_info->module_name = ptr;
1176 }
1177 else ret = FALSE;
1178 }
1179
1180 return ret;
1181 }
1182
1183 /******************************************************************
1184 * elf_load_file
1185 *
1186 * Loads the information for ELF module stored in 'filename'
1187 * the module has been loaded at 'load_offset' address
1188 * returns
1189 * -1 if the file cannot be found/opened
1190 * 0 if the file doesn't contain symbolic info (or this info cannot be
1191 * read or parsed)
1192 * 1 on success
1193 */
1194 static BOOL elf_load_file(struct process* pcs, const WCHAR* filename,
1195 unsigned long load_offset, unsigned long dyn_addr,
1196 struct elf_info* elf_info)
1197 {
1198 BOOL ret = FALSE;
1199 struct image_file_map fmap;
1200 struct elf_map_file_data emfd;
1201
1202 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename), load_offset);
1203
1204 emfd.kind = from_file;
1205 emfd.u.file.filename = filename;
1206 if (!elf_map_file(&emfd, &fmap)) return ret;
1207
1208 /* Next, we need to find a few of the internal ELF headers within
1209 * this thing. We need the main executable header, and the section
1210 * table.
1211 */
1212 if (!fmap.u.elf.elf_start && !load_offset)
1213 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1214 debugstr_w(filename));
1215
1216 ret = elf_load_file_from_fmap(pcs, filename, &fmap, load_offset, dyn_addr, elf_info);
1217
1218 elf_unmap_file(&fmap);
1219
1220 return ret;
1221 }
1222
1223 /******************************************************************
1224 * elf_load_file_from_path
1225 * tries to load an ELF file from a set of paths (separated by ':')
1226 */
1227 static BOOL elf_load_file_from_path(HANDLE hProcess,
1228 const WCHAR* filename,
1229 unsigned long load_offset,
1230 unsigned long dyn_addr,
1231 const char* path,
1232 struct elf_info* elf_info)
1233 {
1234 BOOL ret = FALSE;
1235 WCHAR *s, *t, *fn;
1236 WCHAR* pathW = NULL;
1237 unsigned len;
1238
1239 if (!path) return FALSE;
1240
1241 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1242 pathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
1243 if (!pathW) return FALSE;
1244 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, pathW, len);
1245
1246 for (s = pathW; s && *s; s = (t) ? (t+1) : NULL)
1247 {
1248 t = strchrW(s, ':');
1249 if (t) *t = '\0';
1250 fn = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1 + lstrlenW(s) + 1) * sizeof(WCHAR));
1251 if (!fn) break;
1252 strcpyW(fn, s);
1253 strcatW(fn, S_SlashW);
1254 strcatW(fn, filename);
1255 ret = elf_load_file(hProcess, fn, load_offset, dyn_addr, elf_info);
1256 HeapFree(GetProcessHeap(), 0, fn);
1257 if (ret) break;
1258 s = (t) ? (t+1) : NULL;
1259 }
1260
1261 HeapFree(GetProcessHeap(), 0, pathW);
1262 return ret;
1263 }
1264
1265 /******************************************************************
1266 * elf_load_file_from_dll_path
1267 *
1268 * Tries to load an ELF file from the dll path
1269 */
1270 static BOOL elf_load_file_from_dll_path(HANDLE hProcess,
1271 const WCHAR* filename,
1272 unsigned long load_offset,
1273 unsigned long dyn_addr,
1274 struct elf_info* elf_info)
1275 {
1276 BOOL ret = FALSE;
1277 unsigned int index = 0;
1278 const char *path;
1279
1280 while (!ret && (path = wine_dll_enum_load_path( index++ )))
1281 {
1282 WCHAR *name;
1283 unsigned len;
1284
1285 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1286
1287 name = HeapAlloc( GetProcessHeap(), 0,
1288 (len + lstrlenW(filename) + 2) * sizeof(WCHAR) );
1289
1290 if (!name) break;
1291 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, name, len);
1292 strcatW( name, S_SlashW );
1293 strcatW( name, filename );
1294 ret = elf_load_file(hProcess, name, load_offset, dyn_addr, elf_info);
1295 HeapFree( GetProcessHeap(), 0, name );
1296 }
1297 return ret;
1298 }
1299
1300 #ifdef AT_SYSINFO_EHDR
1301 /******************************************************************
1302 * elf_search_auxv
1303 *
1304 * locate some a value from the debuggee auxillary vector
1305 */
1306 static BOOL elf_search_auxv(const struct process* pcs, unsigned type, unsigned long* val)
1307 {
1308 char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
1309 SYMBOL_INFO*si = (SYMBOL_INFO*)buffer;
1310 void* addr;
1311 void* str;
1312 void* str_max;
1313 Elf_auxv_t auxv;
1314
1315 si->SizeOfStruct = sizeof(*si);
1316 si->MaxNameLen = MAX_SYM_NAME;
1317 if (!SymFromName(pcs->handle, "libwine.so.1!__wine_main_environ", si) ||
1318 !(addr = (void*)(DWORD_PTR)si->Address) ||
1319 !ReadProcessMemory(pcs->handle, addr, &addr, sizeof(addr), NULL) ||
1320 !addr)
1321 {
1322 FIXME("can't find symbol in module\n");
1323 return FALSE;
1324 }
1325 /* walk through envp[] */
1326 /* envp[] strings are located after the auxillary vector, so protect the walk */
1327 str_max = (void*)(DWORD_PTR)~0L;
1328 while (ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) &&
1329 (addr = (void*)((DWORD_PTR)addr + sizeof(str))) != NULL && str != NULL)
1330 str_max = min(str_max, str);
1331
1332 /* Walk through the end of envp[] array.
1333 * Actually, there can be several NULLs at the end of envp[]. This happens when an env variable is
1334 * deleted, the last entry is replaced by an extra NULL.
1335 */
1336 while (addr < str_max && ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) && str == NULL)
1337 addr = (void*)((DWORD_PTR)addr + sizeof(str));
1338
1339 while (ReadProcessMemory(pcs->handle, addr, &auxv, sizeof(auxv), NULL) && auxv.a_type != AT_NULL)
1340 {
1341 if (auxv.a_type == type)
1342 {
1343 *val = auxv.a_un.a_val;
1344 return TRUE;
1345 }
1346 addr = (void*)((DWORD_PTR)addr + sizeof(auxv));
1347 }
1348
1349 return FALSE;
1350 }
1351 #endif
1352
1353 /******************************************************************
1354 * elf_search_and_load_file
1355 *
1356 * lookup a file in standard ELF locations, and if found, load it
1357 */
1358 static BOOL elf_search_and_load_file(struct process* pcs, const WCHAR* filename,
1359 unsigned long load_offset, unsigned long dyn_addr,
1360 struct elf_info* elf_info)
1361 {
1362 BOOL ret = FALSE;
1363 struct module* module;
1364 static WCHAR S_libstdcPPW[] = {'l','i','b','s','t','d','c','+','+','\0'};
1365
1366 if (filename == NULL || *filename == '\0') return FALSE;
1367 if ((module = module_is_already_loaded(pcs, filename)))
1368 {
1369 elf_info->module = module;
1370 elf_info->module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1371 return module->module.SymType;
1372 }
1373
1374 if (strstrW(filename, S_libstdcPPW)) return FALSE; /* We know we can't do it */
1375 ret = elf_load_file(pcs, filename, load_offset, dyn_addr, elf_info);
1376 /* if relative pathname, try some absolute base dirs */
1377 if (!ret && !strchrW(filename, '/'))
1378 {
1379 ret = elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1380 getenv("PATH"), elf_info) ||
1381 elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1382 getenv("LD_LIBRARY_PATH"), elf_info);
1383 if (!ret) ret = elf_load_file_from_dll_path(pcs, filename,
1384 load_offset, dyn_addr, elf_info);
1385 }
1386
1387 return ret;
1388 }
1389
1390 typedef BOOL (*enum_elf_modules_cb)(const WCHAR*, unsigned long load_addr,
1391 unsigned long dyn_addr, BOOL is_system, void* user);
1392
1393 /******************************************************************
1394 * elf_enum_modules_internal
1395 *
1396 * Enumerate ELF modules from a running process
1397 */
1398 static BOOL elf_enum_modules_internal(const struct process* pcs,
1399 const WCHAR* main_name,
1400 enum_elf_modules_cb cb, void* user)
1401 {
1402 struct r_debug dbg_hdr;
1403 void* lm_addr;
1404 struct link_map lm;
1405 char bufstr[256];
1406 WCHAR bufstrW[MAX_PATH];
1407
1408 if (!pcs->dbg_hdr_addr ||
1409 !ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr,
1410 &dbg_hdr, sizeof(dbg_hdr), NULL))
1411 return FALSE;
1412
1413 /* Now walk the linked list. In all known ELF implementations,
1414 * the dynamic loader maintains this linked list for us. In some
1415 * cases the first entry doesn't appear with a name, in other cases it
1416 * does.
1417 */
1418 for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
1419 {
1420 if (!ReadProcessMemory(pcs->handle, lm_addr, &lm, sizeof(lm), NULL))
1421 return FALSE;
1422
1423 if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
1424 lm.l_name != NULL &&
1425 ReadProcessMemory(pcs->handle, lm.l_name, bufstr, sizeof(bufstr), NULL))
1426 {
1427 bufstr[sizeof(bufstr) - 1] = '\0';
1428 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, sizeof(bufstrW) / sizeof(WCHAR));
1429 if (main_name && !bufstrW[0]) strcpyW(bufstrW, main_name);
1430 if (!cb(bufstrW, (unsigned long)lm.l_addr, (unsigned long)lm.l_ld, FALSE, user)) break;
1431 }
1432 }
1433
1434 #ifdef AT_SYSINFO_EHDR
1435 if (!lm_addr)
1436 {
1437 unsigned long ehdr_addr;
1438
1439 if (elf_search_auxv(pcs, AT_SYSINFO_EHDR, &ehdr_addr))
1440 {
1441 static const WCHAR vdsoW[] = {'[','v','d','s','o',']','.','s','o',0};
1442 cb(vdsoW, ehdr_addr, 0, TRUE, user);
1443 }
1444 }
1445 #endif
1446 return TRUE;
1447 }
1448
1449 /******************************************************************
1450 * elf_search_loader
1451 *
1452 * Lookup in a running ELF process the loader, and sets its ELF link
1453 * address (for accessing the list of loaded .so libs) in pcs.
1454 * If flags is ELF_INFO_MODULE, the module for the loader is also
1455 * added as a module into pcs.
1456 */
1457 static BOOL elf_search_loader(struct process* pcs, struct elf_info* elf_info)
1458 {
1459 BOOL ret;
1460 const char* ptr;
1461
1462 /* All binaries are loaded with WINELOADER (if run from tree) or by the
1463 * main executable
1464 */
1465 if ((ptr = getenv("WINELOADER")))
1466 {
1467 WCHAR tmp[MAX_PATH];
1468 MultiByteToWideChar(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp) / sizeof(WCHAR));
1469 ret = elf_search_and_load_file(pcs, tmp, 0, 0, elf_info);
1470 }
1471 else
1472 {
1473 ret = elf_search_and_load_file(pcs, S_WineW, 0, 0, elf_info);
1474 }
1475 return ret;
1476 }
1477
1478 /******************************************************************
1479 * elf_read_wine_loader_dbg_info
1480 *
1481 * Try to find a decent wine executable which could have loaded the debuggee
1482 */
1483 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1484 {
1485 struct elf_info elf_info;
1486
1487 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
1488 if (!elf_search_loader(pcs, &elf_info)) return FALSE;
1489 elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_loader = 1;
1490 module_set_module(elf_info.module, S_WineLoaderW);
1491 return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
1492 }
1493
1494 struct elf_enum_user
1495 {
1496 enum_modules_cb cb;
1497 void* user;
1498 };
1499
1500 static BOOL elf_enum_modules_translate(const WCHAR* name, unsigned long load_addr,
1501 unsigned long dyn_addr, BOOL is_system, void* user)
1502 {
1503 struct elf_enum_user* eeu = user;
1504 return eeu->cb(name, load_addr, eeu->user);
1505 }
1506
1507 /******************************************************************
1508 * elf_enum_modules
1509 *
1510 * Enumerates the ELF loaded modules from a running target (hProc)
1511 * This function doesn't require that someone has called SymInitialize
1512 * on this very process.
1513 */
1514 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1515 {
1516 struct process pcs;
1517 struct elf_info elf_info;
1518 BOOL ret;
1519 struct elf_enum_user eeu;
1520
1521 memset(&pcs, 0, sizeof(pcs));
1522 pcs.handle = hProc;
1523 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_NAME;
1524 if (!elf_search_loader(&pcs, &elf_info)) return FALSE;
1525 pcs.dbg_hdr_addr = elf_info.dbg_hdr_addr;
1526 eeu.cb = cb;
1527 eeu.user = user;
1528 ret = elf_enum_modules_internal(&pcs, elf_info.module_name, elf_enum_modules_translate, &eeu);
1529 HeapFree(GetProcessHeap(), 0, (char*)elf_info.module_name);
1530 return ret;
1531 }
1532
1533 struct elf_load
1534 {
1535 struct process* pcs;
1536 struct elf_info elf_info;
1537 const WCHAR* name;
1538 BOOL ret;
1539 };
1540
1541 /******************************************************************
1542 * elf_load_cb
1543 *
1544 * Callback for elf_load_module, used to walk the list of loaded
1545 * modules.
1546 */
1547 static BOOL elf_load_cb(const WCHAR* name, unsigned long load_addr,
1548 unsigned long dyn_addr, BOOL is_system, void* user)
1549 {
1550 struct elf_load* el = user;
1551 BOOL ret = TRUE;
1552 const WCHAR* p;
1553
1554 if (is_system) /* virtual ELF module, created by system. handle it from memory */
1555 {
1556 struct module* module;
1557 struct elf_map_file_data emfd;
1558 struct image_file_map fmap;
1559
1560 if ((module = module_is_already_loaded(el->pcs, name)))
1561 {
1562 el->elf_info.module = module;
1563 el->elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1564 return module->module.SymType;
1565 }
1566
1567 emfd.kind = from_process;
1568 emfd.u.process.handle = el->pcs->handle;
1569 emfd.u.process.load_addr = (void*)load_addr;
1570
1571 if (elf_map_file(&emfd, &fmap))
1572 el->ret = elf_load_file_from_fmap(el->pcs, name, &fmap, load_addr, 0, &el->elf_info);
1573 return TRUE;
1574 }
1575 if (el->name)
1576 {
1577 /* memcmp is needed for matches when bufstr contains also version information
1578 * el->name: libc.so, name: libc.so.6.0
1579 */
1580 p = strrchrW(name, '/');
1581 if (!p++) p = name;
1582 }
1583
1584 if (!el->name || !memcmp(p, el->name, lstrlenW(el->name) * sizeof(WCHAR)))
1585 {
1586 el->ret = elf_search_and_load_file(el->pcs, name, load_addr, dyn_addr, &el->elf_info);
1587 if (el->name) ret = FALSE;
1588 }
1589
1590 return ret;
1591 }
1592
1593 /******************************************************************
1594 * elf_load_module
1595 *
1596 * loads an ELF module and stores it in process' module list
1597 * Also, find module real name and load address from
1598 * the real loaded modules list in pcs address space
1599 */
1600 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1601 {
1602 struct elf_load el;
1603
1604 TRACE("(%p %s %08lx)\n", pcs, debugstr_w(name), addr);
1605
1606 el.elf_info.flags = ELF_INFO_MODULE;
1607 el.ret = FALSE;
1608
1609 if (pcs->dbg_hdr_addr) /* we're debugging a life target */
1610 {
1611 el.pcs = pcs;
1612 /* do only the lookup from the filename, not the path (as we lookup module
1613 * name in the process' loaded module list)
1614 */
1615 el.name = strrchrW(name, '/');
1616 if (!el.name++) el.name = name;
1617 el.ret = FALSE;
1618
1619 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1620 return NULL;
1621 }
1622 else if (addr)
1623 {
1624 el.name = name;
1625 el.ret = elf_search_and_load_file(pcs, el.name, addr, 0, &el.elf_info);
1626 }
1627 if (!el.ret) return NULL;
1628 assert(el.elf_info.module);
1629 return el.elf_info.module;
1630 }
1631
1632 /******************************************************************
1633 * elf_synchronize_module_list
1634 *
1635 * this functions rescans the debuggee module's list and synchronizes it with
1636 * the one from 'pcs', ie:
1637 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1638 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1639 */
1640 BOOL elf_synchronize_module_list(struct process* pcs)
1641 {
1642 struct module* module;
1643 struct elf_load el;
1644
1645 for (module = pcs->lmodules; module; module = module->next)
1646 {
1647 if (module->type == DMT_ELF && !module->is_virtual)
1648 module->format_info[DFI_ELF]->u.elf_info->elf_mark = 0;
1649 }
1650
1651 el.pcs = pcs;
1652 el.elf_info.flags = ELF_INFO_MODULE;
1653 el.ret = FALSE;
1654 el.name = NULL; /* fetch all modules */
1655
1656 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1657 return FALSE;
1658
1659 module = pcs->lmodules;
1660 while (module)
1661 {
1662 if (module->type == DMT_ELF && !module->is_virtual)
1663 {
1664 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
1665
1666 if (!elf_info->elf_mark && !elf_info->elf_loader)
1667 {
1668 module_remove(pcs, module);
1669 /* restart all over */
1670 module = pcs->lmodules;
1671 continue;
1672 }
1673 }
1674 module = module->next;
1675 }
1676 return TRUE;
1677 }
1678
1679 #else /* !__ELF__ */
1680
1681 BOOL elf_find_section(struct image_file_map* fmap, const char* name,
1682 unsigned sht, struct image_section_map* ism)
1683 {
1684 return FALSE;
1685 }
1686
1687 const char* elf_map_section(struct image_section_map* ism)
1688 {
1689 return NULL;
1690 }
1691
1692 void elf_unmap_section(struct image_section_map* ism)
1693 {}
1694
1695 unsigned elf_get_map_size(const struct image_section_map* ism)
1696 {
1697 return 0;
1698 }
1699
1700 DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
1701 {
1702 return 0;
1703 }
1704
1705 BOOL elf_synchronize_module_list(struct process* pcs)
1706 {
1707 return FALSE;
1708 }
1709
1710 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1711 DWORD* size, DWORD* checksum)
1712 {
1713 return FALSE;
1714 }
1715
1716 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1717 {
1718 return FALSE;
1719 }
1720
1721 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1722 {
1723 return FALSE;
1724 }
1725
1726 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1727 {
1728 return NULL;
1729 }
1730
1731 BOOL elf_load_debug_info(struct module* module)
1732 {
1733 return FALSE;
1734 }
1735
1736 int elf_is_in_thunk_area(unsigned long addr,
1737 const struct elf_thunk_area* thunks)
1738 {
1739 return -1;
1740 }
1741 #endif /* __ELF__ */
Windows API implementation