projects / reactos.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
sync with trunk (r46275)
[reactos.git] / dll / win32 / dbghelp / elf_module.c
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 #ifdef HAVE_ELF_H
52 # include <elf.h>
53 #endif
54 #ifdef HAVE_SYS_ELF32_H
55 # include <sys/elf32.h>
56 #endif
57 #ifdef HAVE_SYS_EXEC_ELF_H
58 # include <sys/exec_elf.h>
59 #endif
60 #if !defined(DT_NUM)
61 # if defined(DT_COUNT)
62 # define DT_NUM DT_COUNT
63 # else
64 /* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */
65 # define DT_NUM 24
66 # endif
67 #endif
68 #ifdef HAVE_LINK_H
69 # include <link.h>
70 #endif
71 #ifdef HAVE_SYS_LINK_H
72 # include <sys/link.h>
73 #endif
74
75 #include "wine/library.h"
76 #include "wine/debug.h"
77
78 struct elf_module_info
79 {
80 DWORD_PTR elf_addr;
81 unsigned short elf_mark : 1,
82 elf_loader : 1;
83 };
84
85 #ifdef __ELF__
86
87 #define ELF_INFO_DEBUG_HEADER 0x0001
88 #define ELF_INFO_MODULE 0x0002
89 #define ELF_INFO_NAME 0x0004
90
91 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
92
93 struct elf_info
94 {
95 unsigned flags; /* IN one (or several) of the ELF_INFO constants */
96 DWORD_PTR dbg_hdr_addr; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
97 struct module* module; /* OUT loaded module (if ELF_INFO_MODULE is set) */
98 const WCHAR* module_name; /* OUT found module name (if ELF_INFO_NAME is set) */
99 };
100
101 #ifdef _WIN64
102 #define Elf_Ehdr Elf64_Ehdr
103 #define Elf_Shdr Elf64_Shdr
104 #define Elf_Phdr Elf64_Phdr
105 #define Elf_Dyn Elf64_Dyn
106 #define Elf_Sym Elf64_Sym
107 #else
108 #define Elf_Ehdr Elf32_Ehdr
109 #define Elf_Shdr Elf32_Shdr
110 #define Elf_Phdr Elf32_Phdr
111 #define Elf_Dyn Elf32_Dyn
112 #define Elf_Sym Elf32_Sym
113 #endif
114
115 /* structure holding information while handling an ELF image
116 * allows one by one section mapping for memory savings
117 */
118 struct elf_file_map
119 {
120 Elf_Ehdr elfhdr;
121 size_t elf_size;
122 size_t elf_start;
123 struct
124 {
125 Elf_Shdr shdr;
126 const char* mapped;
127 }* sect;
128 int fd;
129 const char* shstrtab;
130 struct elf_file_map* alternate; /* another ELF file (linked to this one) */
131 };
132
133 struct elf_section_map
134 {
135 struct elf_file_map* fmap;
136 long sidx;
137 };
138
139 struct symtab_elt
140 {
141 struct hash_table_elt ht_elt;
142 const Elf_Sym* symp;
143 struct symt_compiland* compiland;
144 unsigned used;
145 };
146
147 struct elf_thunk_area
148 {
149 const char* symname;
150 THUNK_ORDINAL ordinal;
151 unsigned long rva_start;
152 unsigned long rva_end;
153 };
154
155 /******************************************************************
156 * elf_map_section
157 *
158 * Maps a single section into memory from an ELF file
159 */
160 static const char* elf_map_section(struct elf_section_map* esm)
161 {
162 unsigned pgsz = getpagesize();
163 unsigned ofst, size;
164
165 if (esm->sidx < 0 || esm->sidx >= esm->fmap->elfhdr.e_shnum ||
166 esm->fmap->sect[esm->sidx].shdr.sh_type == SHT_NOBITS)
167 return ELF_NO_MAP;
168
169 /* align required information on page size (we assume pagesize is a power of 2) */
170 ofst = esm->fmap->sect[esm->sidx].shdr.sh_offset & ~(pgsz - 1);
171 size = ((esm->fmap->sect[esm->sidx].shdr.sh_offset +
172 esm->fmap->sect[esm->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
173 esm->fmap->sect[esm->sidx].mapped = mmap(NULL, size, PROT_READ, MAP_PRIVATE,
174 esm->fmap->fd, ofst);
175 if (esm->fmap->sect[esm->sidx].mapped == ELF_NO_MAP) return ELF_NO_MAP;
176 return esm->fmap->sect[esm->sidx].mapped + (esm->fmap->sect[esm->sidx].shdr.sh_offset & (pgsz - 1));
177 }
178
179 /******************************************************************
180 * elf_find_section
181 *
182 * Finds a section by name (and type) into memory from an ELF file
183 * or its alternate if any
184 */
185 static BOOL elf_find_section(struct elf_file_map* fmap, const char* name,
186 unsigned sht, struct elf_section_map* esm)
187 {
188 unsigned i;
189
190 while (fmap)
191 {
192 if (fmap->shstrtab == ELF_NO_MAP)
193 {
194 struct elf_section_map hdr_esm = {fmap, fmap->elfhdr.e_shstrndx};
195 if ((fmap->shstrtab = elf_map_section(&hdr_esm)) == ELF_NO_MAP) break;
196 }
197 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
198 {
199 if (strcmp(fmap->shstrtab + fmap->sect[i].shdr.sh_name, name) == 0 &&
200 (sht == SHT_NULL || sht == fmap->sect[i].shdr.sh_type))
201 {
202 esm->fmap = fmap;
203 esm->sidx = i;
204 return TRUE;
205 }
206 }
207 fmap = fmap->alternate;
208 }
209 esm->fmap = NULL;
210 esm->sidx = -1;
211 return FALSE;
212 }
213
214 /******************************************************************
215 * elf_unmap_section
216 *
217 * Unmaps a single section from memory
218 */
219 static void elf_unmap_section(struct elf_section_map* esm)
220 {
221 if (esm->sidx >= 0 && esm->sidx < esm->fmap->elfhdr.e_shnum && esm->fmap->sect[esm->sidx].mapped != ELF_NO_MAP)
222 {
223 unsigned pgsz = getpagesize();
224 unsigned ofst, size;
225
226 ofst = esm->fmap->sect[esm->sidx].shdr.sh_offset & ~(pgsz - 1);
227 size = ((esm->fmap->sect[esm->sidx].shdr.sh_offset +
228 esm->fmap->sect[esm->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
229 if (munmap((char*)esm->fmap->sect[esm->sidx].mapped, size) < 0)
230 WARN("Couldn't unmap the section\n");
231 esm->fmap->sect[esm->sidx].mapped = ELF_NO_MAP;
232 }
233 }
234
235 static void elf_end_find(struct elf_file_map* fmap)
236 {
237 struct elf_section_map esm;
238
239 while (fmap)
240 {
241 esm.fmap = fmap;
242 esm.sidx = fmap->elfhdr.e_shstrndx;
243 elf_unmap_section(&esm);
244 fmap->shstrtab = ELF_NO_MAP;
245 fmap = fmap->alternate;
246 }
247 }
248
249 /******************************************************************
250 * elf_get_map_size
251 *
252 * Get the size of an ELF section
253 */
254 static inline unsigned elf_get_map_size(const struct elf_section_map* esm)
255 {
256 if (esm->sidx < 0 || esm->sidx >= esm->fmap->elfhdr.e_shnum)
257 return 0;
258 return esm->fmap->sect[esm->sidx].shdr.sh_size;
259 }
260
261 /******************************************************************
262 * elf_map_file
263 *
264 * Maps an ELF file into memory (and checks it's a real ELF file)
265 */
266 static BOOL elf_map_file(const WCHAR* filenameW, struct elf_file_map* fmap)
267 {
268 static const BYTE elf_signature[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
269 struct stat statbuf;
270 int i;
271 Elf_Phdr phdr;
272 unsigned tmp, page_mask = getpagesize() - 1;
273 char* filename;
274 unsigned len;
275 BOOL ret = FALSE;
276
277 len = WideCharToMultiByte(CP_UNIXCP, 0, filenameW, -1, NULL, 0, NULL, NULL);
278 if (!(filename = HeapAlloc(GetProcessHeap(), 0, len))) return FALSE;
279 WideCharToMultiByte(CP_UNIXCP, 0, filenameW, -1, filename, len, NULL, NULL);
280
281 fmap->fd = -1;
282 fmap->shstrtab = ELF_NO_MAP;
283 fmap->alternate = NULL;
284
285 /* check that the file exists, and that the module hasn't been loaded yet */
286 if (stat(filename, &statbuf) == -1 || S_ISDIR(statbuf.st_mode)) goto done;
287
288 /* Now open the file, so that we can mmap() it. */
289 if ((fmap->fd = open(filename, O_RDONLY)) == -1) goto done;
290
291 if (read(fmap->fd, &fmap->elfhdr, sizeof(fmap->elfhdr)) != sizeof(fmap->elfhdr))
292 goto done;
293 /* and check for an ELF header */
294 if (memcmp(fmap->elfhdr.e_ident,
295 elf_signature, sizeof(elf_signature))) goto done;
296 /* and check 32 vs 64 size according to current machine */
297 #ifdef _WIN64
298 if (fmap->elfhdr.e_ident[EI_CLASS] != ELFCLASS64) goto done;
299 #else
300 if (fmap->elfhdr.e_ident[EI_CLASS] != ELFCLASS32) goto done;
301 #endif
302 fmap->sect = HeapAlloc(GetProcessHeap(), 0,
303 fmap->elfhdr.e_shnum * sizeof(fmap->sect[0]));
304 if (!fmap->sect) goto done;
305
306 lseek(fmap->fd, fmap->elfhdr.e_shoff, SEEK_SET);
307 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
308 {
309 read(fmap->fd, &fmap->sect[i].shdr, sizeof(fmap->sect[i].shdr));
310 fmap->sect[i].mapped = ELF_NO_MAP;
311 }
312
313 /* grab size of module once loaded in memory */
314 lseek(fmap->fd, fmap->elfhdr.e_phoff, SEEK_SET);
315 fmap->elf_size = 0;
316 fmap->elf_start = ~0L;
317 for (i = 0; i < fmap->elfhdr.e_phnum; i++)
318 {
319 if (read(fmap->fd, &phdr, sizeof(phdr)) == sizeof(phdr) &&
320 phdr.p_type == PT_LOAD)
321 {
322 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
323 if (fmap->elf_size < tmp) fmap->elf_size = tmp;
324 if (phdr.p_vaddr < fmap->elf_start) fmap->elf_start = phdr.p_vaddr;
325 }
326 }
327 /* if non relocatable ELF, then remove fixed address from computation
328 * otherwise, all addresses are zero based and start has no effect
329 */
330 fmap->elf_size -= fmap->elf_start;
331 ret = TRUE;
332 done:
333 HeapFree(GetProcessHeap(), 0, filename);
334 return ret;
335 }
336
337 /******************************************************************
338 * elf_unmap_file
339 *
340 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
341 */
342 static void elf_unmap_file(struct elf_file_map* fmap)
343 {
344 while (fmap)
345 {
346 if (fmap->fd != -1)
347 {
348 struct elf_section_map esm;
349 esm.fmap = fmap;
350 for (esm.sidx = 0; esm.sidx < fmap->elfhdr.e_shnum; esm.sidx++)
351 {
352 elf_unmap_section(&esm);
353 }
354 HeapFree(GetProcessHeap(), 0, fmap->sect);
355 close(fmap->fd);
356 }
357 fmap = fmap->alternate;
358 }
359 }
360
361 /******************************************************************
362 * elf_is_in_thunk_area
363 *
364 * Check whether an address lies within one of the thunk area we
365 * know of.
366 */
367 int elf_is_in_thunk_area(unsigned long addr,
368 const struct elf_thunk_area* thunks)
369 {
370 unsigned i;
371
372 if (thunks) for (i = 0; thunks[i].symname; i++)
373 {
374 if (addr >= thunks[i].rva_start && addr < thunks[i].rva_end)
375 return i;
376 }
377 return -1;
378 }
379
380 /******************************************************************
381 * elf_hash_symtab
382 *
383 * creating an internal hash table to ease use ELF symtab information lookup
384 */
385 static void elf_hash_symtab(struct module* module, struct pool* pool,
386 struct hash_table* ht_symtab, struct elf_file_map* fmap,
387 struct elf_thunk_area* thunks)
388 {
389 int i, j, nsym;
390 const char* strp;
391 const char* symname;
392 struct symt_compiland* compiland = NULL;
393 const char* ptr;
394 const Elf_Sym* symp;
395 struct symtab_elt* ste;
396 struct elf_section_map esm, esm_str;
397
398 if (!elf_find_section(fmap, ".symtab", SHT_SYMTAB, &esm) &&
399 !elf_find_section(fmap, ".dynsym", SHT_DYNSYM, &esm)) return;
400 if ((symp = (const Elf_Sym*)elf_map_section(&esm)) == ELF_NO_MAP) return;
401 esm_str.fmap = fmap;
402 esm_str.sidx = fmap->sect[esm.sidx].shdr.sh_link;
403 if ((strp = elf_map_section(&esm_str)) == ELF_NO_MAP) return;
404
405 nsym = elf_get_map_size(&esm) / sizeof(*symp);
406
407 for (j = 0; thunks[j].symname; j++)
408 thunks[j].rva_start = thunks[j].rva_end = 0;
409
410 for (i = 0; i < nsym; i++, symp++)
411 {
412 /* Ignore certain types of entries which really aren't of that much
413 * interest.
414 */
415 if ((ELF32_ST_TYPE(symp->st_info) != STT_NOTYPE &&
416 ELF32_ST_TYPE(symp->st_info) != STT_FILE &&
417 ELF32_ST_TYPE(symp->st_info) != STT_OBJECT &&
418 ELF32_ST_TYPE(symp->st_info) != STT_FUNC) ||
419 symp->st_shndx == SHN_UNDEF)
420 {
421 continue;
422 }
423
424 symname = strp + symp->st_name;
425
426 /* handle some specific symtab (that we'll throw away when done) */
427 switch (ELF32_ST_TYPE(symp->st_info))
428 {
429 case STT_FILE:
430 if (symname)
431 compiland = symt_new_compiland(module, symp->st_value,
432 source_new(module, NULL, symname));
433 else
434 compiland = NULL;
435 continue;
436 case STT_NOTYPE:
437 /* we are only interested in wine markers inserted by winebuild */
438 for (j = 0; thunks[j].symname; j++)
439 {
440 if (!strcmp(symname, thunks[j].symname))
441 {
442 thunks[j].rva_start = symp->st_value;
443 thunks[j].rva_end = symp->st_value + symp->st_size;
444 break;
445 }
446 }
447 continue;
448 }
449
450 /* FIXME: we don't need to handle them (GCC internals)
451 * Moreover, they screw up our symbol lookup :-/
452 */
453 if (symname[0] == '.' && symname[1] == 'L' && isdigit(symname[2]))
454 continue;
455
456 ste = pool_alloc(pool, sizeof(*ste));
457 ste->ht_elt.name = symname;
458 /* GCC emits, in some cases, a .<digit>+ suffix.
459 * This is used for static variable inside functions, so
460 * that we can have several such variables with same name in
461 * the same compilation unit
462 * We simply ignore that suffix when present (we also get rid
463 * of it in stabs parsing)
464 */
465 ptr = symname + strlen(symname) - 1;
466 if (isdigit(*ptr))
467 {
468 while (isdigit(*ptr) && ptr >= symname) ptr--;
469 if (ptr > symname && *ptr == '.')
470 {
471 char* n = pool_alloc(pool, ptr - symname + 1);
472 memcpy(n, symname, ptr - symname + 1);
473 n[ptr - symname] = '\0';
474 ste->ht_elt.name = n;
475 }
476 }
477 ste->symp = symp;
478 ste->compiland = compiland;
479 ste->used = 0;
480 hash_table_add(ht_symtab, &ste->ht_elt);
481 }
482 /* as we added in the ht_symtab pointers to the symbols themselves,
483 * we cannot unmap yet the sections, it will be done when we're over
484 * with this ELF file
485 */
486 }
487
488 /******************************************************************
489 * elf_lookup_symtab
490 *
491 * lookup a symbol by name in our internal hash table for the symtab
492 */
493 static const Elf_Sym* elf_lookup_symtab(const struct module* module,
494 const struct hash_table* ht_symtab,
495 const char* name, const struct symt* compiland)
496 {
497 struct symtab_elt* weak_result = NULL; /* without compiland name */
498 struct symtab_elt* result = NULL;
499 struct hash_table_iter hti;
500 struct symtab_elt* ste;
501 const char* compiland_name;
502 const char* compiland_basename;
503 const char* base;
504
505 /* we need weak match up (at least) when symbols of same name,
506 * defined several times in different compilation units,
507 * are merged in a single one (hence a different filename for c.u.)
508 */
509 if (compiland)
510 {
511 compiland_name = source_get(module,
512 ((const struct symt_compiland*)compiland)->source);
513 compiland_basename = strrchr(compiland_name, '/');
514 if (!compiland_basename++) compiland_basename = compiland_name;
515 }
516 else compiland_name = compiland_basename = NULL;
517
518 hash_table_iter_init(ht_symtab, &hti, name);
519 while ((ste = hash_table_iter_up(&hti)))
520 {
521 if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
522
523 weak_result = ste;
524 if ((ste->compiland && !compiland_name) || (!ste->compiland && compiland_name))
525 continue;
526 if (ste->compiland && compiland_name)
527 {
528 const char* filename = source_get(module, ste->compiland->source);
529 if (strcmp(filename, compiland_name))
530 {
531 base = strrchr(filename, '/');
532 if (!base++) base = filename;
533 if (strcmp(base, compiland_basename)) continue;
534 }
535 }
536 if (result)
537 {
538 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
539 name, compiland_name,
540 source_get(module, result->compiland->source), (unsigned int)result->symp->st_value,
541 source_get(module, ste->compiland->source), (unsigned int)ste->symp->st_value);
542 }
543 else
544 {
545 result = ste;
546 ste->used = 1;
547 }
548 }
549 if (!result && !(result = weak_result))
550 {
551 FIXME("Couldn't find symbol %s!%s in symtab\n",
552 debugstr_w(module->module.ModuleName), name);
553 return NULL;
554 }
555 return result->symp;
556 }
557
558 /******************************************************************
559 * elf_finish_stabs_info
560 *
561 * - get any relevant information (address & size) from the bits we got from the
562 * stabs debugging information
563 */
564 static void elf_finish_stabs_info(struct module* module, const struct hash_table* symtab)
565 {
566 struct hash_table_iter hti;
567 void* ptr;
568 struct symt_ht* sym;
569 const Elf_Sym* symp;
570
571 hash_table_iter_init(&module->ht_symbols, &hti, NULL);
572 while ((ptr = hash_table_iter_up(&hti)))
573 {
574 sym = GET_ENTRY(ptr, struct symt_ht, hash_elt);
575 switch (sym->symt.tag)
576 {
577 case SymTagFunction:
578 if (((struct symt_function*)sym)->address != module->elf_info->elf_addr &&
579 ((struct symt_function*)sym)->size)
580 {
581 break;
582 }
583 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
584 ((struct symt_function*)sym)->container);
585 if (symp)
586 {
587 if (((struct symt_function*)sym)->address != module->elf_info->elf_addr &&
588 ((struct symt_function*)sym)->address != module->elf_info->elf_addr + symp->st_value)
589 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
590 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
591 ((struct symt_function*)sym)->address, module->elf_info->elf_addr + symp->st_value);
592 if (((struct symt_function*)sym)->size && ((struct symt_function*)sym)->size != symp->st_size)
593 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
594 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
595 ((struct symt_function*)sym)->size, (unsigned int)symp->st_size);
596
597 ((struct symt_function*)sym)->address = module->elf_info->elf_addr +
598 symp->st_value;
599 ((struct symt_function*)sym)->size = symp->st_size;
600 } else
601 FIXME("Couldn't find %s!%s\n",
602 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
603 break;
604 case SymTagData:
605 switch (((struct symt_data*)sym)->kind)
606 {
607 case DataIsGlobal:
608 case DataIsFileStatic:
609 if (((struct symt_data*)sym)->u.var.offset != module->elf_info->elf_addr)
610 break;
611 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
612 ((struct symt_data*)sym)->container);
613 if (symp)
614 {
615 if (((struct symt_data*)sym)->u.var.offset != module->elf_info->elf_addr &&
616 ((struct symt_data*)sym)->u.var.offset != module->elf_info->elf_addr + symp->st_value)
617 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
618 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
619 ((struct symt_function*)sym)->address, module->elf_info->elf_addr + symp->st_value);
620 ((struct symt_data*)sym)->u.var.offset = module->elf_info->elf_addr +
621 symp->st_value;
622 ((struct symt_data*)sym)->kind = (ELF32_ST_BIND(symp->st_info) == STB_LOCAL) ?
623 DataIsFileStatic : DataIsGlobal;
624 } else
625 FIXME("Couldn't find %s!%s\n",
626 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
627 break;
628 default:;
629 }
630 break;
631 default:
632 FIXME("Unsupported tag %u\n", sym->symt.tag);
633 break;
634 }
635 }
636 /* since we may have changed some addresses & sizes, mark the module to be resorted */
637 module->sortlist_valid = FALSE;
638 }
639
640 /******************************************************************
641 * elf_load_wine_thunks
642 *
643 * creating the thunk objects for a wine native DLL
644 */
645 static int elf_new_wine_thunks(struct module* module, const struct hash_table* ht_symtab,
646 const struct elf_thunk_area* thunks)
647 {
648 int j;
649 struct hash_table_iter hti;
650 struct symtab_elt* ste;
651 DWORD_PTR addr;
652 struct symt_ht* symt;
653
654 hash_table_iter_init(ht_symtab, &hti, NULL);
655 while ((ste = hash_table_iter_up(&hti)))
656 {
657 if (ste->used) continue;
658
659 addr = module->elf_info->elf_addr + ste->symp->st_value;
660
661 j = elf_is_in_thunk_area(ste->symp->st_value, thunks);
662 if (j >= 0) /* thunk found */
663 {
664 symt_new_thunk(module, ste->compiland, ste->ht_elt.name, thunks[j].ordinal,
665 addr, ste->symp->st_size);
666 }
667 else
668 {
669 ULONG64 ref_addr;
670
671 symt = symt_find_nearest(module, addr);
672 if (symt && !symt_get_info(module, &symt->symt, TI_GET_ADDRESS, &ref_addr))
673 ref_addr = addr;
674 if (!symt || addr != ref_addr)
675 {
676 /* creating public symbols for all the ELF symbols which haven't been
677 * used yet (ie we have no debug information on them)
678 * That's the case, for example, of the .spec.c files
679 */
680 switch (ELF32_ST_TYPE(ste->symp->st_info))
681 {
682 case STT_FUNC:
683 symt_new_function(module, ste->compiland, ste->ht_elt.name,
684 addr, ste->symp->st_size, NULL);
685 break;
686 case STT_OBJECT:
687 symt_new_global_variable(module, ste->compiland, ste->ht_elt.name,
688 ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL,
689 addr, ste->symp->st_size, NULL);
690 break;
691 default:
692 FIXME("Shouldn't happen\n");
693 break;
694 }
695 /* FIXME: this is a hack !!!
696 * we are adding new symbols, but as we're parsing a symbol table
697 * (hopefully without duplicate symbols) we delay rebuilding the sorted
698 * module table until we're done with the symbol table
699 * Otherwise, as we intertwine symbols's add and lookup, performance
700 * is rather bad
701 */
702 module->sortlist_valid = TRUE;
703 }
704 else if (strcmp(ste->ht_elt.name, symt->hash_elt.name))
705 {
706 ULONG64 xaddr = 0, xsize = 0;
707 DWORD kind = -1;
708
709 symt_get_info(module, &symt->symt, TI_GET_ADDRESS, &xaddr);
710 symt_get_info(module, &symt->symt, TI_GET_LENGTH, &xsize);
711 symt_get_info(module, &symt->symt, TI_GET_DATAKIND, &kind);
712
713 /* If none of symbols has a correct size, we consider they are both markers
714 * Hence, we can silence this warning
715 * Also, we check that we don't have two symbols, one local, the other
716 * global which is legal
717 */
718 if ((xsize || ste->symp->st_size) &&
719 (kind == (ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL) ? DataIsFileStatic : DataIsGlobal))
720 FIXME("Duplicate in %s: %s<%08lx-%08x> %s<%s-%s>\n",
721 debugstr_w(module->module.ModuleName),
722 ste->ht_elt.name, addr, (unsigned int)ste->symp->st_size,
723 symt->hash_elt.name,
724 wine_dbgstr_longlong(xaddr), wine_dbgstr_longlong(xsize));
725 }
726 }
727 }
728 /* see comment above */
729 module->sortlist_valid = FALSE;
730 return TRUE;
731 }
732
733 /******************************************************************
734 * elf_new_public_symbols
735 *
736 * Creates a set of public symbols from an ELF symtab
737 */
738 static int elf_new_public_symbols(struct module* module, const struct hash_table* symtab)
739 {
740 struct hash_table_iter hti;
741 struct symtab_elt* ste;
742
743 if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
744
745 /* FIXME: we're missing the ELF entry point here */
746
747 hash_table_iter_init(symtab, &hti, NULL);
748 while ((ste = hash_table_iter_up(&hti)))
749 {
750 symt_new_public(module, ste->compiland, ste->ht_elt.name,
751 module->elf_info->elf_addr + ste->symp->st_value,
752 ste->symp->st_size);
753 }
754 return TRUE;
755 }
756
757 static BOOL elf_check_debug_link(const WCHAR* file, struct elf_file_map* fmap, DWORD crc)
758 {
759 BOOL ret;
760 if (!elf_map_file(file, fmap)) return FALSE;
761 if (!(ret = crc == calc_crc32(fmap->fd)))
762 {
763 WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
764 debugstr_w(file), calc_crc32(fmap->fd), crc);
765 elf_unmap_file(fmap);
766 }
767 return ret;
768 }
769
770 /******************************************************************
771 * elf_locate_debug_link
772 *
773 * Locate a filename from a .gnu_debuglink section, using the same
774 * strategy as gdb:
775 * "If the full name of the directory containing the executable is
776 * execdir, and the executable has a debug link that specifies the
777 * name debugfile, then GDB will automatically search for the
778 * debugging information file in three places:
779 * - the directory containing the executable file (that is, it
780 * will look for a file named `execdir/debugfile',
781 * - a subdirectory of that directory named `.debug' (that is, the
782 * file `execdir/.debug/debugfile', and
783 * - a subdirectory of the global debug file directory that includes
784 * the executable's full path, and the name from the link (that is,
785 * the file `globaldebugdir/execdir/debugfile', where globaldebugdir
786 * is the global debug file directory, and execdir has been turned
787 * into a relative path)." (from GDB manual)
788 */
789 static BOOL elf_locate_debug_link(struct elf_file_map* fmap, const char* filename,
790 const WCHAR* loaded_file, DWORD crc)
791 {
792 static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
793 static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
794 const size_t globalDebugDirLen = sizeof(globalDebugDirW) / sizeof(WCHAR);
795 size_t filename_len;
796 WCHAR* p = NULL;
797 WCHAR* slash;
798 struct elf_file_map* fmap_link = NULL;
799
800 fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
801 if (!fmap_link) return FALSE;
802
803 filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
804 p = HeapAlloc(GetProcessHeap(), 0,
805 (globalDebugDirLen + strlenW(loaded_file) + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
806 if (!p) goto found;
807
808 /* we prebuild the string with "execdir" */
809 strcpyW(p, loaded_file);
810 slash = strrchrW(p, '/');
811 if (slash == NULL) slash = p; else slash++;
812
813 /* testing execdir/filename */
814 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
815 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
816
817 /* testing execdir/.debug/filename */
818 memcpy(slash, dotDebugW, sizeof(dotDebugW));
819 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + sizeof(dotDebugW) / sizeof(WCHAR), filename_len);
820 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
821
822 /* testing globaldebugdir/execdir/filename */
823 memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
824 memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
825 slash += globalDebugDirLen;
826 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
827 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
828
829 /* finally testing filename */
830 if (elf_check_debug_link(slash, fmap_link, crc)) goto found;
831
832
833 WARN("Couldn't locate or map %s\n", filename);
834 HeapFree(GetProcessHeap(), 0, p);
835 HeapFree(GetProcessHeap(), 0, fmap_link);
836 return FALSE;
837
838 found:
839 TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
840 HeapFree(GetProcessHeap(), 0, p);
841 fmap->alternate = fmap_link;
842 return TRUE;
843 }
844
845 /******************************************************************
846 * elf_debuglink_parse
847 *
848 * Parses a .gnu_debuglink section and loads the debug info from
849 * the external file specified there.
850 */
851 static BOOL elf_debuglink_parse(struct elf_file_map* fmap, const struct module* module,
852 const BYTE* debuglink)
853 {
854 /* The content of a debug link section is:
855 * 1/ a NULL terminated string, containing the file name for the
856 * debug info
857 * 2/ padding on 4 byte boundary
858 * 3/ CRC of the linked ELF file
859 */
860 const char* dbg_link = (const char*)debuglink;
861 DWORD crc;
862
863 crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
864 return elf_locate_debug_link(fmap, dbg_link, module->module.LoadedImageName, crc);
865 }
866
867 /******************************************************************
868 * elf_load_debug_info_from_map
869 *
870 * Loads the symbolic information from ELF module which mapping is described
871 * in fmap
872 * the module has been loaded at 'load_offset' address, so symbols' address
873 * relocation is performed.
874 * CRC is checked if fmap->with_crc is TRUE
875 * returns
876 * 0 if the file doesn't contain symbolic info (or this info cannot be
877 * read or parsed)
878 * 1 on success
879 */
880 static BOOL elf_load_debug_info_from_map(struct module* module,
881 struct elf_file_map* fmap,
882 struct pool* pool,
883 struct hash_table* ht_symtab)
884 {
885 BOOL ret = FALSE, lret;
886 struct elf_thunk_area thunks[] =
887 {
888 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
889 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
890 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
891 {"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
892 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
893 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
894 {NULL, 0, 0, 0}
895 };
896
897 module->module.SymType = SymExport;
898
899 /* create a hash table for the symtab */
900 elf_hash_symtab(module, pool, ht_symtab, fmap, thunks);
901
902 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
903 {
904 struct elf_section_map stab_sect, stabstr_sect;
905 struct elf_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
906 debug_line_sect, debug_loclist_sect;
907 struct elf_section_map debuglink_sect;
908
909 /* if present, add the .gnu_debuglink file as an alternate to current one */
910 if (elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
911 {
912 const BYTE* dbg_link;
913
914 dbg_link = (const BYTE*)elf_map_section(&debuglink_sect);
915 if (dbg_link != ELF_NO_MAP)
916 {
917 lret = elf_debuglink_parse(fmap, module, dbg_link);
918 if (!lret)
919 WARN("Couldn't load linked debug file for %s\n",
920 debugstr_w(module->module.ModuleName));
921 ret = ret || lret;
922 }
923 elf_unmap_section(&debuglink_sect);
924 }
925 if (elf_find_section(fmap, ".stab", SHT_NULL, &stab_sect) &&
926 elf_find_section(fmap, ".stabstr", SHT_NULL, &stabstr_sect))
927 {
928 const char* stab;
929 const char* stabstr;
930
931 stab = elf_map_section(&stab_sect);
932 stabstr = elf_map_section(&stabstr_sect);
933 if (stab != ELF_NO_MAP && stabstr != ELF_NO_MAP)
934 {
935 /* OK, now just parse all of the stabs. */
936 lret = stabs_parse(module, module->elf_info->elf_addr,
937 stab, elf_get_map_size(&stab_sect),
938 stabstr, elf_get_map_size(&stabstr_sect),
939 NULL, NULL);
940 if (lret)
941 /* and fill in the missing information for stabs */
942 elf_finish_stabs_info(module, ht_symtab);
943 else
944 WARN("Couldn't correctly read stabs\n");
945 ret = ret || lret;
946 }
947 else lret = FALSE;
948 elf_unmap_section(&stab_sect);
949 elf_unmap_section(&stabstr_sect);
950 }
951 if (elf_find_section(fmap, ".debug_info", SHT_NULL, &debug_sect))
952 {
953 /* Dwarf 2 debug information */
954 const BYTE* dw2_debug;
955 const BYTE* dw2_debug_abbrev;
956 const BYTE* dw2_debug_str;
957 const BYTE* dw2_debug_line;
958 const BYTE* dw2_debug_loclist;
959
960 /* debug info might have a different base address than .so file
961 * when elf file is prelinked after splitting off debug info
962 * adjust symbol base addresses accordingly
963 */
964 unsigned long load_offset = module->elf_info->elf_addr +
965 fmap->elf_start - debug_sect.fmap->elf_start;
966
967 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
968
969 elf_find_section(fmap, ".debug_str", SHT_NULL, &debug_str_sect);
970 elf_find_section(fmap, ".debug_abbrev", SHT_NULL, &debug_abbrev_sect);
971 elf_find_section(fmap, ".debug_line", SHT_NULL, &debug_line_sect);
972 elf_find_section(fmap, ".debug_loc", SHT_NULL, &debug_loclist_sect);
973
974 dw2_debug = (const BYTE*)elf_map_section(&debug_sect);
975 dw2_debug_abbrev = (const BYTE*)elf_map_section(&debug_abbrev_sect);
976 dw2_debug_str = (const BYTE*)elf_map_section(&debug_str_sect);
977 dw2_debug_line = (const BYTE*)elf_map_section(&debug_line_sect);
978 dw2_debug_loclist = (const BYTE*)elf_map_section(&debug_loclist_sect);
979 if (dw2_debug != ELF_NO_MAP && dw2_debug_abbrev != ELF_NO_MAP && dw2_debug_str != ELF_NO_MAP)
980 {
981 /* OK, now just parse dwarf2 debug infos. */
982 lret = dwarf2_parse(module, load_offset, thunks,
983 dw2_debug, elf_get_map_size(&debug_sect),
984 dw2_debug_abbrev, elf_get_map_size(&debug_abbrev_sect),
985 dw2_debug_str, elf_get_map_size(&debug_str_sect),
986 dw2_debug_line, elf_get_map_size(&debug_line_sect),
987 dw2_debug_loclist, elf_get_map_size(&debug_loclist_sect));
988
989 if (!lret)
990 WARN("Couldn't correctly read dwarf2\n");
991 ret = ret || lret;
992 }
993 elf_unmap_section(&debug_sect);
994 elf_unmap_section(&debug_abbrev_sect);
995 elf_unmap_section(&debug_str_sect);
996 elf_unmap_section(&debug_line_sect);
997 elf_unmap_section(&debug_loclist_sect);
998 }
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, struct elf_file_map* fmap)
1019 {
1020 BOOL ret = TRUE;
1021 struct pool pool;
1022 struct hash_table ht_symtab;
1023 struct elf_file_map my_fmap;
1024
1025 if (module->type != DMT_ELF || !module->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 if (!fmap)
1035 {
1036 fmap = &my_fmap;
1037 ret = elf_map_file(module->module.LoadedImageName, fmap);
1038 }
1039 if (ret)
1040 ret = elf_load_debug_info_from_map(module, fmap, &pool, &ht_symtab);
1041
1042 pool_destroy(&pool);
1043 if (fmap == &my_fmap) elf_unmap_file(fmap);
1044 return ret;
1045 }
1046
1047 /******************************************************************
1048 * elf_fetch_file_info
1049 *
1050 * Gathers some more information for an ELF module from a given file
1051 */
1052 BOOL elf_fetch_file_info(const WCHAR* name, DWORD* base,
1053 DWORD* size, DWORD* checksum)
1054 {
1055 struct elf_file_map fmap;
1056
1057 if (!elf_map_file(name, &fmap)) return FALSE;
1058 if (base) *base = fmap.elf_start;
1059 *size = fmap.elf_size;
1060 *checksum = calc_crc32(fmap.fd);
1061 elf_unmap_file(&fmap);
1062 return TRUE;
1063 }
1064
1065 /******************************************************************
1066 * elf_load_file
1067 *
1068 * Loads the information for ELF module stored in 'filename'
1069 * the module has been loaded at 'load_offset' address
1070 * returns
1071 * -1 if the file cannot be found/opened
1072 * 0 if the file doesn't contain symbolic info (or this info cannot be
1073 * read or parsed)
1074 * 1 on success
1075 */
1076 static BOOL elf_load_file(struct process* pcs, const WCHAR* filename,
1077 unsigned long load_offset, struct elf_info* elf_info)
1078 {
1079 BOOL ret = FALSE;
1080 struct elf_file_map fmap;
1081
1082 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename), load_offset);
1083
1084 if (!elf_map_file(filename, &fmap)) return ret;
1085
1086 /* Next, we need to find a few of the internal ELF headers within
1087 * this thing. We need the main executable header, and the section
1088 * table.
1089 */
1090 if (!fmap.elf_start && !load_offset)
1091 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1092 debugstr_w(filename));
1093 if (fmap.elf_start && load_offset)
1094 {
1095 WARN("Non-relocatable ELF %s, but load address of 0x%08lx supplied. "
1096 "Assuming load address is corrupt\n", debugstr_w(filename), load_offset);
1097 load_offset = 0;
1098 }
1099
1100 if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
1101 {
1102 struct elf_section_map esm;
1103
1104 if (elf_find_section(&fmap, ".dynamic", SHT_DYNAMIC, &esm))
1105 {
1106 Elf_Dyn dyn;
1107 char* ptr = (char*)fmap.sect[esm.sidx].shdr.sh_addr;
1108 unsigned long len;
1109
1110 do
1111 {
1112 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1113 len != sizeof(dyn))
1114 goto leave;
1115 if (dyn.d_tag == DT_DEBUG)
1116 {
1117 elf_info->dbg_hdr_addr = dyn.d_un.d_ptr;
1118 break;
1119 }
1120 ptr += sizeof(dyn);
1121 } while (dyn.d_tag != DT_NULL);
1122 if (dyn.d_tag == DT_NULL) goto leave;
1123 }
1124 elf_end_find(&fmap);
1125 }
1126
1127 if (elf_info->flags & ELF_INFO_MODULE)
1128 {
1129 struct elf_module_info *elf_module_info =
1130 HeapAlloc(GetProcessHeap(), 0, sizeof(struct elf_module_info));
1131 if (!elf_module_info) goto leave;
1132 elf_info->module = module_new(pcs, filename, DMT_ELF, FALSE,
1133 (load_offset) ? load_offset : fmap.elf_start,
1134 fmap.elf_size, 0, calc_crc32(fmap.fd));
1135 if (!elf_info->module)
1136 {
1137 HeapFree(GetProcessHeap(), 0, elf_module_info);
1138 goto leave;
1139 }
1140 elf_info->module->elf_info = elf_module_info;
1141 elf_info->module->elf_info->elf_addr = load_offset;
1142
1143 if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
1144 {
1145 elf_info->module->module.SymType = SymDeferred;
1146 ret = TRUE;
1147 }
1148 else ret = elf_load_debug_info(elf_info->module, &fmap);
1149
1150 elf_info->module->elf_info->elf_mark = 1;
1151 elf_info->module->elf_info->elf_loader = 0;
1152 } else ret = TRUE;
1153
1154 if (elf_info->flags & ELF_INFO_NAME)
1155 {
1156 WCHAR* ptr;
1157 ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1) * sizeof(WCHAR));
1158 if (ptr)
1159 {
1160 strcpyW(ptr, filename);
1161 elf_info->module_name = ptr;
1162 }
1163 else ret = FALSE;
1164 }
1165 leave:
1166 elf_unmap_file(&fmap);
1167
1168 return ret;
1169 }
1170
1171 /******************************************************************
1172 * elf_load_file_from_path
1173 * tries to load an ELF file from a set of paths (separated by ':')
1174 */
1175 static BOOL elf_load_file_from_path(HANDLE hProcess,
1176 const WCHAR* filename,
1177 unsigned long load_offset,
1178 const char* path,
1179 struct elf_info* elf_info)
1180 {
1181 BOOL ret = FALSE;
1182 WCHAR *s, *t, *fn;
1183 WCHAR* pathW = NULL;
1184 unsigned len;
1185
1186 if (!path) return FALSE;
1187
1188 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1189 pathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
1190 if (!pathW) return FALSE;
1191 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, pathW, len);
1192
1193 for (s = pathW; s && *s; s = (t) ? (t+1) : NULL)
1194 {
1195 t = strchrW(s, ':');
1196 if (t) *t = '\0';
1197 fn = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1 + lstrlenW(s) + 1) * sizeof(WCHAR));
1198 if (!fn) break;
1199 strcpyW(fn, s);
1200 strcatW(fn, S_SlashW);
1201 strcatW(fn, filename);
1202 ret = elf_load_file(hProcess, fn, load_offset, elf_info);
1203 HeapFree(GetProcessHeap(), 0, fn);
1204 if (ret) break;
1205 s = (t) ? (t+1) : NULL;
1206 }
1207
1208 HeapFree(GetProcessHeap(), 0, pathW);
1209 return ret;
1210 }
1211
1212 /******************************************************************
1213 * elf_load_file_from_dll_path
1214 *
1215 * Tries to load an ELF file from the dll path
1216 */
1217 static BOOL elf_load_file_from_dll_path(HANDLE hProcess,
1218 const WCHAR* filename,
1219 unsigned long load_offset,
1220 struct elf_info* elf_info)
1221 {
1222 BOOL ret = FALSE;
1223 unsigned int index = 0;
1224 const char *path;
1225
1226 while (!ret && (path = wine_dll_enum_load_path( index++ )))
1227 {
1228 WCHAR *name;
1229 unsigned len;
1230
1231 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1232
1233 name = HeapAlloc( GetProcessHeap(), 0,
1234 (len + lstrlenW(filename) + 2) * sizeof(WCHAR) );
1235
1236 if (!name) break;
1237 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, name, len);
1238 strcatW( name, S_SlashW );
1239 strcatW( name, filename );
1240 ret = elf_load_file(hProcess, name, load_offset, elf_info);
1241 HeapFree( GetProcessHeap(), 0, name );
1242 }
1243 return ret;
1244 }
1245
1246 /******************************************************************
1247 * elf_search_and_load_file
1248 *
1249 * lookup a file in standard ELF locations, and if found, load it
1250 */
1251 static BOOL elf_search_and_load_file(struct process* pcs, const WCHAR* filename,
1252 unsigned long load_offset,
1253 struct elf_info* elf_info)
1254 {
1255 BOOL ret = FALSE;
1256 struct module* module;
1257 static WCHAR S_libstdcPPW[] = {'l','i','b','s','t','d','c','+','+','\0'};
1258
1259 if (filename == NULL || *filename == '\0') return FALSE;
1260 if ((module = module_is_already_loaded(pcs, filename)))
1261 {
1262 elf_info->module = module;
1263 module->elf_info->elf_mark = 1;
1264 return module->module.SymType;
1265 }
1266
1267 if (strstrW(filename, S_libstdcPPW)) return FALSE; /* We know we can't do it */
1268 ret = elf_load_file(pcs, filename, load_offset, elf_info);
1269 /* if relative pathname, try some absolute base dirs */
1270 if (!ret && !strchrW(filename, '/'))
1271 {
1272 ret = elf_load_file_from_path(pcs, filename, load_offset,
1273 getenv("PATH"), elf_info) ||
1274 elf_load_file_from_path(pcs, filename, load_offset,
1275 getenv("LD_LIBRARY_PATH"), elf_info);
1276 if (!ret) ret = elf_load_file_from_dll_path(pcs, filename, load_offset, elf_info);
1277 }
1278
1279 return ret;
1280 }
1281
1282 /******************************************************************
1283 * elf_enum_modules_internal
1284 *
1285 * Enumerate ELF modules from a running process
1286 */
1287 static BOOL elf_enum_modules_internal(const struct process* pcs,
1288 const WCHAR* main_name,
1289 enum_modules_cb cb, void* user)
1290 {
1291 struct r_debug dbg_hdr;
1292 void* lm_addr;
1293 struct link_map lm;
1294 char bufstr[256];
1295 WCHAR bufstrW[MAX_PATH];
1296
1297 if (!pcs->dbg_hdr_addr ||
1298 !ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr,
1299 &dbg_hdr, sizeof(dbg_hdr), NULL))
1300 return FALSE;
1301
1302 /* Now walk the linked list. In all known ELF implementations,
1303 * the dynamic loader maintains this linked list for us. In some
1304 * cases the first entry doesn't appear with a name, in other cases it
1305 * does.
1306 */
1307 for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
1308 {
1309 if (!ReadProcessMemory(pcs->handle, lm_addr, &lm, sizeof(lm), NULL))
1310 return FALSE;
1311
1312 if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
1313 lm.l_name != NULL &&
1314 ReadProcessMemory(pcs->handle, lm.l_name, bufstr, sizeof(bufstr), NULL))
1315 {
1316 bufstr[sizeof(bufstr) - 1] = '\0';
1317 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, sizeof(bufstrW) / sizeof(WCHAR));
1318 if (main_name && !bufstrW[0]) strcpyW(bufstrW, main_name);
1319 if (!cb(bufstrW, (unsigned long)lm.l_addr, user)) break;
1320 }
1321 }
1322 return TRUE;
1323 }
1324
1325 struct elf_sync
1326 {
1327 struct process* pcs;
1328 struct elf_info elf_info;
1329 };
1330
1331 static BOOL elf_enum_sync_cb(const WCHAR* name, unsigned long addr, void* user)
1332 {
1333 struct elf_sync* es = user;
1334
1335 elf_search_and_load_file(es->pcs, name, addr, &es->elf_info);
1336 return TRUE;
1337 }
1338
1339 /******************************************************************
1340 * elf_synchronize_module_list
1341 *
1342 * this functions rescans the debuggee module's list and synchronizes it with
1343 * the one from 'pcs', ie:
1344 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1345 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1346 */
1347 BOOL elf_synchronize_module_list(struct process* pcs)
1348 {
1349 struct module* module;
1350 struct elf_sync es;
1351
1352 for (module = pcs->lmodules; module; module = module->next)
1353 {
1354 if (module->type == DMT_ELF && !module->is_virtual)
1355 module->elf_info->elf_mark = 0;
1356 }
1357
1358 es.pcs = pcs;
1359 es.elf_info.flags = ELF_INFO_MODULE;
1360 if (!elf_enum_modules_internal(pcs, NULL, elf_enum_sync_cb, &es))
1361 return FALSE;
1362
1363 module = pcs->lmodules;
1364 while (module)
1365 {
1366 if (module->type == DMT_ELF && !module->is_virtual &&
1367 !module->elf_info->elf_mark && !module->elf_info->elf_loader)
1368 {
1369 module_remove(pcs, module);
1370 /* restart all over */
1371 module = pcs->lmodules;
1372 }
1373 else module = module->next;
1374 }
1375 return TRUE;
1376 }
1377
1378 /******************************************************************
1379 * elf_search_loader
1380 *
1381 * Lookup in a running ELF process the loader, and sets its ELF link
1382 * address (for accessing the list of loaded .so libs) in pcs.
1383 * If flags is ELF_INFO_MODULE, the module for the loader is also
1384 * added as a module into pcs.
1385 */
1386 static BOOL elf_search_loader(struct process* pcs, struct elf_info* elf_info)
1387 {
1388 BOOL ret;
1389 const char* ptr;
1390
1391 /* All binaries are loaded with WINELOADER (if run from tree) or by the
1392 * main executable
1393 */
1394 if ((ptr = getenv("WINELOADER")))
1395 {
1396 WCHAR tmp[MAX_PATH];
1397 MultiByteToWideChar(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp) / sizeof(WCHAR));
1398 ret = elf_search_and_load_file(pcs, tmp, 0, elf_info);
1399 }
1400 else
1401 {
1402 ret = elf_search_and_load_file(pcs, S_WineW, 0, elf_info);
1403 }
1404 return ret;
1405 }
1406
1407 /******************************************************************
1408 * elf_read_wine_loader_dbg_info
1409 *
1410 * Try to find a decent wine executable which could have loaded the debuggee
1411 */
1412 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1413 {
1414 struct elf_info elf_info;
1415
1416 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
1417 if (!elf_search_loader(pcs, &elf_info)) return FALSE;
1418 elf_info.module->elf_info->elf_loader = 1;
1419 module_set_module(elf_info.module, S_WineLoaderW);
1420 return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
1421 }
1422
1423 /******************************************************************
1424 * elf_enum_modules
1425 *
1426 * Enumerates the ELF loaded modules from a running target (hProc)
1427 * This function doesn't require that someone has called SymInitialize
1428 * on this very process.
1429 */
1430 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1431 {
1432 struct process pcs;
1433 struct elf_info elf_info;
1434 BOOL ret;
1435
1436 memset(&pcs, 0, sizeof(pcs));
1437 pcs.handle = hProc;
1438 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_NAME;
1439 if (!elf_search_loader(&pcs, &elf_info)) return FALSE;
1440 pcs.dbg_hdr_addr = elf_info.dbg_hdr_addr;
1441 ret = elf_enum_modules_internal(&pcs, elf_info.module_name, cb, user);
1442 HeapFree(GetProcessHeap(), 0, (char*)elf_info.module_name);
1443 return ret;
1444 }
1445
1446 struct elf_load
1447 {
1448 struct process* pcs;
1449 struct elf_info elf_info;
1450 const WCHAR* name;
1451 BOOL ret;
1452 };
1453
1454 /******************************************************************
1455 * elf_load_cb
1456 *
1457 * Callback for elf_load_module, used to walk the list of loaded
1458 * modules.
1459 */
1460 static BOOL elf_load_cb(const WCHAR* name, unsigned long addr, void* user)
1461 {
1462 struct elf_load* el = user;
1463 const WCHAR* p;
1464
1465 /* memcmp is needed for matches when bufstr contains also version information
1466 * el->name: libc.so, name: libc.so.6.0
1467 */
1468 p = strrchrW(name, '/');
1469 if (!p++) p = name;
1470 if (!memcmp(p, el->name, lstrlenW(el->name) * sizeof(WCHAR)))
1471 {
1472 el->ret = elf_search_and_load_file(el->pcs, name, addr, &el->elf_info);
1473 return FALSE;
1474 }
1475 return TRUE;
1476 }
1477
1478 /******************************************************************
1479 * elf_load_module
1480 *
1481 * loads an ELF module and stores it in process' module list
1482 * Also, find module real name and load address from
1483 * the real loaded modules list in pcs address space
1484 */
1485 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1486 {
1487 struct elf_load el;
1488
1489 TRACE("(%p %s %08lx)\n", pcs, debugstr_w(name), addr);
1490
1491 el.elf_info.flags = ELF_INFO_MODULE;
1492 el.ret = FALSE;
1493
1494 if (pcs->dbg_hdr_addr) /* we're debugging a life target */
1495 {
1496 el.pcs = pcs;
1497 /* do only the lookup from the filename, not the path (as we lookup module
1498 * name in the process' loaded module list)
1499 */
1500 el.name = strrchrW(name, '/');
1501 if (!el.name++) el.name = name;
1502 el.ret = FALSE;
1503
1504 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1505 return NULL;
1506 }
1507 else if (addr)
1508 {
1509 el.name = name;
1510 el.ret = elf_search_and_load_file(pcs, el.name, addr, &el.elf_info);
1511 }
1512 if (!el.ret) return NULL;
1513 assert(el.elf_info.module);
1514 return el.elf_info.module;
1515 }
1516
1517 #else /* !__ELF__ */
1518
1519 BOOL elf_synchronize_module_list(struct process* pcs)
1520 {
1521 return FALSE;
1522 }
1523
1524 BOOL elf_fetch_file_info(const WCHAR* name, DWORD* base,
1525 DWORD* size, DWORD* checksum)
1526 {
1527 return FALSE;
1528 }
1529
1530 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1531 {
1532 return FALSE;
1533 }
1534
1535 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1536 {
1537 return FALSE;
1538 }
1539
1540 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1541 {
1542 return NULL;
1543 }
1544
1545 BOOL elf_load_debug_info(struct module* module, struct elf_file_map* fmap)
1546 {
1547 return FALSE;
1548 }
1549
1550 int elf_is_in_thunk_area(unsigned long addr,
1551 const struct elf_thunk_area* thunks)
1552 {
1553 return -1;
1554 }
1555 #endif /* __ELF__ */
A free Windows-compatible Operating System