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d2d1: Add a pixel shader for triangle/solid/bitmap draws.
[wine.git] / dlls / dbghelp / elf_module.c
blobb176143492a0cc3895bb7ce12ed2bc3b4bce3da1
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
46 #include "dbghelp_private.h"
47
48 #include "image_private.h"
49
50 #include "wine/library.h"
51 #include "wine/debug.h"
52
53 #ifdef __ELF__
54
55 #define ELF_INFO_DEBUG_HEADER 0x0001
56 #define ELF_INFO_MODULE 0x0002
57 #define ELF_INFO_NAME 0x0004
58
59 #ifndef NT_GNU_BUILD_ID
60 #define NT_GNU_BUILD_ID 3
61 #endif
62
63 #ifndef HAVE_STRUCT_R_DEBUG
64 struct r_debug
65 {
66 int r_version;
67 struct link_map *r_map;
68 ElfW(Addr) r_brk;
69 enum
70 {
71 RT_CONSISTENT,
72 RT_ADD,
73 RT_DELETE
74 } r_state;
75 ElfW(Addr) r_ldbase;
76 };
77 #endif /* HAVE_STRUCT_R_DEBUG */
78
79 #ifndef HAVE_STRUCT_LINK_MAP
80 struct link_map
81 {
82 ElfW(Addr) l_addr;
83 char *l_name;
84 ElfW(Dyn) *l_ld;
85 struct link_map *l_next, *l_prev;
86 };
87 #endif /* HAVE_STRUCT_LINK_MAP */
88
89 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
90
91 struct elf_info
92 {
93 unsigned flags; /* IN one (or several) of the ELF_INFO constants */
94 DWORD_PTR dbg_hdr_addr; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
95 struct module* module; /* OUT loaded module (if ELF_INFO_MODULE is set) */
96 const WCHAR* module_name; /* OUT found module name (if ELF_INFO_NAME is set) */
97 };
98
99 struct symtab_elt
100 {
101 struct hash_table_elt ht_elt;
102 const Elf_Sym* symp;
103 struct symt_compiland* compiland;
104 unsigned used;
105 };
106
107 struct elf_thunk_area
108 {
109 const char* symname;
110 THUNK_ORDINAL ordinal;
111 unsigned long rva_start;
112 unsigned long rva_end;
113 };
114
115 struct elf_module_info
116 {
117 unsigned long elf_addr;
118 unsigned short elf_mark : 1,
119 elf_loader : 1;
120 struct image_file_map file_map;
121 };
122
123 /******************************************************************
124 * elf_map_section
125 *
126 * Maps a single section into memory from an ELF file
127 */
128 const char* elf_map_section(struct image_section_map* ism)
129 {
130 struct elf_file_map* fmap = &ism->fmap->u.elf;
131 size_t ofst, size, pgsz = sysconf( _SC_PAGESIZE );
132
133 assert(ism->fmap->modtype == DMT_ELF);
134 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum ||
135 fmap->sect[ism->sidx].shdr.sh_type == SHT_NOBITS)
136 return IMAGE_NO_MAP;
137
138 if (fmap->target_copy)
139 {
140 return fmap->target_copy + fmap->sect[ism->sidx].shdr.sh_offset;
141 }
142 /* align required information on page size (we assume pagesize is a power of 2) */
143 ofst = fmap->sect[ism->sidx].shdr.sh_offset & ~(pgsz - 1);
144 size = ((fmap->sect[ism->sidx].shdr.sh_offset +
145 fmap->sect[ism->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
146 fmap->sect[ism->sidx].mapped = mmap(NULL, size, PROT_READ, MAP_PRIVATE,
147 fmap->fd, ofst);
148 if (fmap->sect[ism->sidx].mapped == IMAGE_NO_MAP) return IMAGE_NO_MAP;
149 return fmap->sect[ism->sidx].mapped + (fmap->sect[ism->sidx].shdr.sh_offset & (pgsz - 1));
150 }
151
152 /******************************************************************
153 * elf_find_section
154 *
155 * Finds a section by name (and type) into memory from an ELF file
156 * or its alternate if any
157 */
158 BOOL elf_find_section(struct image_file_map* _fmap, const char* name,
159 unsigned sht, struct image_section_map* ism)
160 {
161 struct elf_file_map* fmap;
162 unsigned i;
163
164 while (_fmap)
165 {
166 fmap = &_fmap->u.elf;
167 if (fmap->shstrtab == IMAGE_NO_MAP)
168 {
169 struct image_section_map hdr_ism = {_fmap, fmap->elfhdr.e_shstrndx};
170 if ((fmap->shstrtab = elf_map_section(&hdr_ism)) == IMAGE_NO_MAP) break;
171 }
172 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
173 {
174 if (strcmp(fmap->shstrtab + fmap->sect[i].shdr.sh_name, name) == 0 &&
175 (sht == SHT_NULL || sht == fmap->sect[i].shdr.sh_type))
176 {
177 ism->fmap = _fmap;
178 ism->sidx = i;
179 return TRUE;
180 }
181 }
182 _fmap = fmap->alternate;
183 }
184 ism->fmap = NULL;
185 ism->sidx = -1;
186 return FALSE;
187 }
188
189 /******************************************************************
190 * elf_unmap_section
191 *
192 * Unmaps a single section from memory
193 */
194 void elf_unmap_section(struct image_section_map* ism)
195 {
196 struct elf_file_map* fmap = &ism->fmap->u.elf;
197
198 if (ism->sidx >= 0 && ism->sidx < fmap->elfhdr.e_shnum && !fmap->target_copy &&
199 fmap->sect[ism->sidx].mapped != IMAGE_NO_MAP)
200 {
201 size_t pgsz = sysconf( _SC_PAGESIZE );
202 size_t ofst = fmap->sect[ism->sidx].shdr.sh_offset & ~(pgsz - 1);
203 size_t size = ((fmap->sect[ism->sidx].shdr.sh_offset +
204 fmap->sect[ism->sidx].shdr.sh_size + pgsz - 1) & ~(pgsz - 1)) - ofst;
205 if (munmap((char*)fmap->sect[ism->sidx].mapped, size) < 0)
206 WARN("Couldn't unmap the section\n");
207 fmap->sect[ism->sidx].mapped = IMAGE_NO_MAP;
208 }
209 }
210
211 static void elf_end_find(struct image_file_map* fmap)
212 {
213 struct image_section_map ism;
214
215 while (fmap)
216 {
217 ism.fmap = fmap;
218 ism.sidx = fmap->u.elf.elfhdr.e_shstrndx;
219 elf_unmap_section(&ism);
220 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
221 fmap = fmap->u.elf.alternate;
222 }
223 }
224
225 /******************************************************************
226 * elf_get_map_rva
227 *
228 * Get the RVA of an ELF section
229 */
230 DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
231 {
232 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
233 return 0;
234 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_addr - ism->fmap->u.elf.elf_start;
235 }
236
237 /******************************************************************
238 * elf_get_map_size
239 *
240 * Get the size of an ELF section
241 */
242 unsigned elf_get_map_size(const struct image_section_map* ism)
243 {
244 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
245 return 0;
246 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_size;
247 }
248
249 static inline void elf_reset_file_map(struct image_file_map* fmap)
250 {
251 fmap->u.elf.fd = -1;
252 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
253 fmap->u.elf.alternate = NULL;
254 fmap->u.elf.target_copy = NULL;
255 }
256
257 struct elf_map_file_data
258 {
259 enum {from_file, from_process} kind;
260 union
261 {
262 struct
263 {
264 const WCHAR* filename;
265 } file;
266 struct
267 {
268 HANDLE handle;
269 void* load_addr;
270 } process;
271 } u;
272 };
273
274 static BOOL elf_map_file_read(struct image_file_map* fmap, struct elf_map_file_data* emfd,
275 void* buf, size_t len, off_t off)
276 {
277 SIZE_T dw;
278
279 switch (emfd->kind)
280 {
281 case from_file:
282 return pread(fmap->u.elf.fd, buf, len, off) == len;
283 case from_process:
284 return ReadProcessMemory(emfd->u.process.handle,
285 (void*)((unsigned long)emfd->u.process.load_addr + (unsigned long)off),
286 buf, len, &dw) && dw == len;
287 default:
288 assert(0);
289 return FALSE;
290 }
291 }
292
293 /******************************************************************
294 * elf_map_file
295 *
296 * Maps an ELF file into memory (and checks it's a real ELF file)
297 */
298 static BOOL elf_map_file(struct elf_map_file_data* emfd, struct image_file_map* fmap)
299 {
300 static const BYTE elf_signature[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
301 struct stat statbuf;
302 unsigned int i;
303 Elf_Phdr phdr;
304 size_t tmp, page_mask = sysconf( _SC_PAGESIZE ) - 1;
305 char* filename;
306 unsigned len;
307 BOOL ret = FALSE;
308
309 switch (emfd->kind)
310 {
311 case from_file:
312 len = WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, NULL, 0, NULL, NULL);
313 if (!(filename = HeapAlloc(GetProcessHeap(), 0, len))) return FALSE;
314 WideCharToMultiByte(CP_UNIXCP, 0, emfd->u.file.filename, -1, filename, len, NULL, NULL);
315 break;
316 case from_process:
317 filename = NULL;
318 break;
319 default: assert(0);
320 return FALSE;
321 }
322
323 elf_reset_file_map(fmap);
324
325 fmap->modtype = DMT_ELF;
326 fmap->u.elf.fd = -1;
327 fmap->u.elf.target_copy = NULL;
328
329 switch (emfd->kind)
330 {
331 case from_file:
332 /* check that the file exists, and that the module hasn't been loaded yet */
333 if (stat(filename, &statbuf) == -1 || S_ISDIR(statbuf.st_mode)) goto done;
334
335 /* Now open the file, so that we can mmap() it. */
336 if ((fmap->u.elf.fd = open(filename, O_RDONLY)) == -1) goto done;
337 break;
338 case from_process:
339 break;
340 }
341 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr, sizeof(fmap->u.elf.elfhdr), 0))
342 goto done;
343
344 /* and check for an ELF header */
345 if (memcmp(fmap->u.elf.elfhdr.e_ident,
346 elf_signature, sizeof(elf_signature))) goto done;
347 /* and check 32 vs 64 size according to current machine */
348 #ifdef _WIN64
349 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS64) goto done;
350 #else
351 if (fmap->u.elf.elfhdr.e_ident[EI_CLASS] != ELFCLASS32) goto done;
352 #endif
353 fmap->addr_size = fmap->u.elf.elfhdr.e_ident[EI_CLASS] == ELFCLASS64 ? 64 : 32;
354 fmap->u.elf.sect = HeapAlloc(GetProcessHeap(), 0,
355 fmap->u.elf.elfhdr.e_shnum * sizeof(fmap->u.elf.sect[0]));
356 if (!fmap->u.elf.sect) goto done;
357
358 for (i = 0; i < fmap->u.elf.elfhdr.e_shnum; i++)
359 {
360 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.sect[i].shdr, sizeof(fmap->u.elf.sect[i].shdr),
361 fmap->u.elf.elfhdr.e_shoff + i * sizeof(fmap->u.elf.sect[i].shdr)))
362 {
363 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
364 fmap->u.elf.sect = NULL;
365 goto done;
366 }
367 fmap->u.elf.sect[i].mapped = IMAGE_NO_MAP;
368 }
369
370 /* grab size of module once loaded in memory */
371 fmap->u.elf.elf_size = 0;
372 fmap->u.elf.elf_start = ~0L;
373 for (i = 0; i < fmap->u.elf.elfhdr.e_phnum; i++)
374 {
375 if (elf_map_file_read(fmap, emfd, &phdr, sizeof(phdr),
376 fmap->u.elf.elfhdr.e_phoff + i * sizeof(phdr)) &&
377 phdr.p_type == PT_LOAD)
378 {
379 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
380 if (fmap->u.elf.elf_size < tmp) fmap->u.elf.elf_size = tmp;
381 if (phdr.p_vaddr < fmap->u.elf.elf_start) fmap->u.elf.elf_start = phdr.p_vaddr;
382 }
383 }
384 /* if non relocatable ELF, then remove fixed address from computation
385 * otherwise, all addresses are zero based and start has no effect
386 */
387 fmap->u.elf.elf_size -= fmap->u.elf.elf_start;
388
389 switch (emfd->kind)
390 {
391 case from_file: break;
392 case from_process:
393 if (!(fmap->u.elf.target_copy = HeapAlloc(GetProcessHeap(), 0, fmap->u.elf.elf_size)))
394 {
395 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
396 goto done;
397 }
398 if (!ReadProcessMemory(emfd->u.process.handle, emfd->u.process.load_addr, fmap->u.elf.target_copy,
399 fmap->u.elf.elf_size, NULL))
400 {
401 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
402 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
403 goto done;
404 }
405 break;
406 }
407 ret = TRUE;
408 done:
409 HeapFree(GetProcessHeap(), 0, filename);
410 return ret;
411 }
412
413 /******************************************************************
414 * elf_unmap_file
415 *
416 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
417 */
418 static void elf_unmap_file(struct image_file_map* fmap)
419 {
420 while (fmap)
421 {
422 if (fmap->u.elf.fd != -1)
423 {
424 struct image_section_map ism;
425 ism.fmap = fmap;
426 for (ism.sidx = 0; ism.sidx < fmap->u.elf.elfhdr.e_shnum; ism.sidx++)
427 {
428 elf_unmap_section(&ism);
429 }
430 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
431 close(fmap->u.elf.fd);
432 }
433 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
434 fmap = fmap->u.elf.alternate;
435 }
436 }
437
438 static void elf_module_remove(struct process* pcs, struct module_format* modfmt)
439 {
440 elf_unmap_file(&modfmt->u.elf_info->file_map);
441 HeapFree(GetProcessHeap(), 0, modfmt);
442 }
443
444 /******************************************************************
445 * elf_is_in_thunk_area
446 *
447 * Check whether an address lies within one of the thunk area we
448 * know of.
449 */
450 int elf_is_in_thunk_area(unsigned long addr,
451 const struct elf_thunk_area* thunks)
452 {
453 unsigned i;
454
455 if (thunks) for (i = 0; thunks[i].symname; i++)
456 {
457 if (addr >= thunks[i].rva_start && addr < thunks[i].rva_end)
458 return i;
459 }
460 return -1;
461 }
462
463 /******************************************************************
464 * elf_hash_symtab
465 *
466 * creating an internal hash table to ease use ELF symtab information lookup
467 */
468 static void elf_hash_symtab(struct module* module, struct pool* pool,
469 struct hash_table* ht_symtab, struct image_file_map* fmap,
470 struct elf_thunk_area* thunks)
471 {
472 int i, j, nsym;
473 const char* strp;
474 const char* symname;
475 struct symt_compiland* compiland = NULL;
476 const char* ptr;
477 const Elf_Sym* symp;
478 struct symtab_elt* ste;
479 struct image_section_map ism, ism_str;
480
481 if (!elf_find_section(fmap, ".symtab", SHT_SYMTAB, &ism) &&
482 !elf_find_section(fmap, ".dynsym", SHT_DYNSYM, &ism)) return;
483 if ((symp = (const Elf_Sym*)image_map_section(&ism)) == IMAGE_NO_MAP) return;
484 ism_str.fmap = ism.fmap;
485 ism_str.sidx = fmap->u.elf.sect[ism.sidx].shdr.sh_link;
486 if ((strp = image_map_section(&ism_str)) == IMAGE_NO_MAP)
487 {
488 image_unmap_section(&ism);
489 return;
490 }
491
492 nsym = image_get_map_size(&ism) / sizeof(*symp);
493
494 for (j = 0; thunks[j].symname; j++)
495 thunks[j].rva_start = thunks[j].rva_end = 0;
496
497 for (i = 0; i < nsym; i++, symp++)
498 {
499 /* Ignore certain types of entries which really aren't of that much
500 * interest.
501 */
502 if ((ELF32_ST_TYPE(symp->st_info) != STT_NOTYPE &&
503 ELF32_ST_TYPE(symp->st_info) != STT_FILE &&
504 ELF32_ST_TYPE(symp->st_info) != STT_OBJECT &&
505 ELF32_ST_TYPE(symp->st_info) != STT_FUNC) ||
506 symp->st_shndx == SHN_UNDEF)
507 {
508 continue;
509 }
510
511 symname = strp + symp->st_name;
512
513 /* handle some specific symtab (that we'll throw away when done) */
514 switch (ELF32_ST_TYPE(symp->st_info))
515 {
516 case STT_FILE:
517 if (symname)
518 compiland = symt_new_compiland(module, symp->st_value,
519 source_new(module, NULL, symname));
520 else
521 compiland = NULL;
522 continue;
523 case STT_NOTYPE:
524 /* we are only interested in wine markers inserted by winebuild */
525 for (j = 0; thunks[j].symname; j++)
526 {
527 if (!strcmp(symname, thunks[j].symname))
528 {
529 thunks[j].rva_start = symp->st_value;
530 thunks[j].rva_end = symp->st_value + symp->st_size;
531 break;
532 }
533 }
534 continue;
535 }
536
537 /* FIXME: we don't need to handle them (GCC internals)
538 * Moreover, they screw up our symbol lookup :-/
539 */
540 if (symname[0] == '.' && symname[1] == 'L' && isdigit(symname[2]))
541 continue;
542
543 ste = pool_alloc(pool, sizeof(*ste));
544 ste->ht_elt.name = symname;
545 /* GCC emits, in some cases, a .<digit>+ suffix.
546 * This is used for static variable inside functions, so
547 * that we can have several such variables with same name in
548 * the same compilation unit
549 * We simply ignore that suffix when present (we also get rid
550 * of it in stabs parsing)
551 */
552 ptr = symname + strlen(symname) - 1;
553 if (isdigit(*ptr))
554 {
555 while (isdigit(*ptr) && ptr >= symname) ptr--;
556 if (ptr > symname && *ptr == '.')
557 {
558 char* n = pool_alloc(pool, ptr - symname + 1);
559 memcpy(n, symname, ptr - symname + 1);
560 n[ptr - symname] = '\0';
561 ste->ht_elt.name = n;
562 }
563 }
564 ste->symp = symp;
565 ste->compiland = compiland;
566 ste->used = 0;
567 hash_table_add(ht_symtab, &ste->ht_elt);
568 }
569 /* as we added in the ht_symtab pointers to the symbols themselves,
570 * we cannot unmap yet the sections, it will be done when we're over
571 * with this ELF file
572 */
573 }
574
575 /******************************************************************
576 * elf_lookup_symtab
577 *
578 * lookup a symbol by name in our internal hash table for the symtab
579 */
580 static const Elf_Sym* elf_lookup_symtab(const struct module* module,
581 const struct hash_table* ht_symtab,
582 const char* name, const struct symt* compiland)
583 {
584 struct symtab_elt* weak_result = NULL; /* without compiland name */
585 struct symtab_elt* result = NULL;
586 struct hash_table_iter hti;
587 struct symtab_elt* ste;
588 const char* compiland_name;
589 const char* compiland_basename;
590 const char* base;
591
592 /* we need weak match up (at least) when symbols of same name,
593 * defined several times in different compilation units,
594 * are merged in a single one (hence a different filename for c.u.)
595 */
596 if (compiland)
597 {
598 compiland_name = source_get(module,
599 ((const struct symt_compiland*)compiland)->source);
600 compiland_basename = strrchr(compiland_name, '/');
601 if (!compiland_basename++) compiland_basename = compiland_name;
602 }
603 else compiland_name = compiland_basename = NULL;
604
605 hash_table_iter_init(ht_symtab, &hti, name);
606 while ((ste = hash_table_iter_up(&hti)))
607 {
608 if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
609
610 weak_result = ste;
611 if ((ste->compiland && !compiland_name) || (!ste->compiland && compiland_name))
612 continue;
613 if (ste->compiland && compiland_name)
614 {
615 const char* filename = source_get(module, ste->compiland->source);
616 if (strcmp(filename, compiland_name))
617 {
618 base = strrchr(filename, '/');
619 if (!base++) base = filename;
620 if (strcmp(base, compiland_basename)) continue;
621 }
622 }
623 if (result)
624 {
625 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
626 name, compiland_name,
627 source_get(module, result->compiland->source), (unsigned int)result->symp->st_value,
628 source_get(module, ste->compiland->source), (unsigned int)ste->symp->st_value);
629 }
630 else
631 {
632 result = ste;
633 ste->used = 1;
634 }
635 }
636 if (!result && !(result = weak_result))
637 {
638 FIXME("Couldn't find symbol %s!%s in symtab\n",
639 debugstr_w(module->module.ModuleName), name);
640 return NULL;
641 }
642 return result->symp;
643 }
644
645 /******************************************************************
646 * elf_finish_stabs_info
647 *
648 * - get any relevant information (address & size) from the bits we got from the
649 * stabs debugging information
650 */
651 static void elf_finish_stabs_info(struct module* module, const struct hash_table* symtab)
652 {
653 struct hash_table_iter hti;
654 void* ptr;
655 struct symt_ht* sym;
656 const Elf_Sym* symp;
657 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
658
659 hash_table_iter_init(&module->ht_symbols, &hti, NULL);
660 while ((ptr = hash_table_iter_up(&hti)))
661 {
662 sym = GET_ENTRY(ptr, struct symt_ht, hash_elt);
663 switch (sym->symt.tag)
664 {
665 case SymTagFunction:
666 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
667 ((struct symt_function*)sym)->size)
668 {
669 break;
670 }
671 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
672 ((struct symt_function*)sym)->container);
673 if (symp)
674 {
675 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
676 ((struct symt_function*)sym)->address != 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 if (((struct symt_function*)sym)->size && ((struct symt_function*)sym)->size != symp->st_size)
681 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
682 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
683 ((struct symt_function*)sym)->size, (unsigned int)symp->st_size);
684
685 ((struct symt_function*)sym)->address = elf_info->elf_addr + symp->st_value;
686 ((struct symt_function*)sym)->size = symp->st_size;
687 } else
688 FIXME("Couldn't find %s!%s\n",
689 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
690 break;
691 case SymTagData:
692 switch (((struct symt_data*)sym)->kind)
693 {
694 case DataIsGlobal:
695 case DataIsFileStatic:
696 if (((struct symt_data*)sym)->u.var.kind != loc_absolute ||
697 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr)
698 break;
699 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
700 ((struct symt_data*)sym)->container);
701 if (symp)
702 {
703 if (((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr &&
704 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr + symp->st_value)
705 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
706 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
707 ((struct symt_function*)sym)->address, elf_info->elf_addr + symp->st_value);
708 ((struct symt_data*)sym)->u.var.offset = elf_info->elf_addr + symp->st_value;
709 ((struct symt_data*)sym)->kind = (ELF32_ST_BIND(symp->st_info) == STB_LOCAL) ?
710 DataIsFileStatic : DataIsGlobal;
711 } else
712 FIXME("Couldn't find %s!%s\n",
713 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
714 break;
715 default:;
716 }
717 break;
718 default:
719 FIXME("Unsupported tag %u\n", sym->symt.tag);
720 break;
721 }
722 }
723 /* since we may have changed some addresses & sizes, mark the module to be resorted */
724 module->sortlist_valid = FALSE;
725 }
726
727 /******************************************************************
728 * elf_load_wine_thunks
729 *
730 * creating the thunk objects for a wine native DLL
731 */
732 static int elf_new_wine_thunks(struct module* module, const struct hash_table* ht_symtab,
733 const struct elf_thunk_area* thunks)
734 {
735 int j;
736 struct hash_table_iter hti;
737 struct symtab_elt* ste;
738 DWORD_PTR addr;
739 struct symt_ht* symt;
740
741 hash_table_iter_init(ht_symtab, &hti, NULL);
742 while ((ste = hash_table_iter_up(&hti)))
743 {
744 if (ste->used) continue;
745
746 addr = module->reloc_delta + ste->symp->st_value;
747
748 j = elf_is_in_thunk_area(ste->symp->st_value, thunks);
749 if (j >= 0) /* thunk found */
750 {
751 symt_new_thunk(module, ste->compiland, ste->ht_elt.name, thunks[j].ordinal,
752 addr, ste->symp->st_size);
753 }
754 else
755 {
756 ULONG64 ref_addr;
757 struct location loc;
758
759 symt = symt_find_nearest(module, addr);
760 if (symt && !symt_get_address(&symt->symt, &ref_addr))
761 ref_addr = addr;
762 if (!symt || addr != ref_addr)
763 {
764 /* creating public symbols for all the ELF symbols which haven't been
765 * used yet (ie we have no debug information on them)
766 * That's the case, for example, of the .spec.c files
767 */
768 switch (ELF32_ST_TYPE(ste->symp->st_info))
769 {
770 case STT_FUNC:
771 symt_new_function(module, ste->compiland, ste->ht_elt.name,
772 addr, ste->symp->st_size, NULL);
773 break;
774 case STT_OBJECT:
775 loc.kind = loc_absolute;
776 loc.reg = 0;
777 loc.offset = addr;
778 symt_new_global_variable(module, ste->compiland, ste->ht_elt.name,
779 ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL,
780 loc, ste->symp->st_size, NULL);
781 break;
782 default:
783 FIXME("Shouldn't happen\n");
784 break;
785 }
786 /* FIXME: this is a hack !!!
787 * we are adding new symbols, but as we're parsing a symbol table
788 * (hopefully without duplicate symbols) we delay rebuilding the sorted
789 * module table until we're done with the symbol table
790 * Otherwise, as we intertwine symbols' add and lookup, performance
791 * is rather bad
792 */
793 module->sortlist_valid = TRUE;
794 }
795 }
796 }
797 /* see comment above */
798 module->sortlist_valid = FALSE;
799 return TRUE;
800 }
801
802 /******************************************************************
803 * elf_new_public_symbols
804 *
805 * Creates a set of public symbols from an ELF symtab
806 */
807 static int elf_new_public_symbols(struct module* module, const struct hash_table* symtab)
808 {
809 struct hash_table_iter hti;
810 struct symtab_elt* ste;
811
812 if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
813
814 /* FIXME: we're missing the ELF entry point here */
815
816 hash_table_iter_init(symtab, &hti, NULL);
817 while ((ste = hash_table_iter_up(&hti)))
818 {
819 symt_new_public(module, ste->compiland, ste->ht_elt.name,
820 module->reloc_delta + ste->symp->st_value,
821 ste->symp->st_size);
822 }
823 return TRUE;
824 }
825
826 static BOOL elf_check_debug_link(const WCHAR* file, struct image_file_map* fmap, DWORD crc)
827 {
828 BOOL ret;
829 struct elf_map_file_data emfd;
830
831 emfd.kind = from_file;
832 emfd.u.file.filename = file;
833 if (!elf_map_file(&emfd, fmap)) return FALSE;
834 if (!(ret = crc == calc_crc32(fmap->u.elf.fd)))
835 {
836 WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
837 debugstr_w(file), calc_crc32(fmap->u.elf.fd), crc);
838 elf_unmap_file(fmap);
839 }
840 return ret;
841 }
842
843 /******************************************************************
844 * elf_locate_debug_link
845 *
846 * Locate a filename from a .gnu_debuglink section, using the same
847 * strategy as gdb:
848 * "If the full name of the directory containing the executable is
849 * execdir, and the executable has a debug link that specifies the
850 * name debugfile, then GDB will automatically search for the
851 * debugging information file in three places:
852 * - the directory containing the executable file (that is, it
853 * will look for a file named `execdir/debugfile',
854 * - a subdirectory of that directory named `.debug' (that is, the
855 * file `execdir/.debug/debugfile', and
856 * - a subdirectory of the global debug file directory that includes
857 * the executable's full path, and the name from the link (that is,
858 * the file `globaldebugdir/execdir/debugfile', where globaldebugdir
859 * is the global debug file directory, and execdir has been turned
860 * into a relative path)." (from GDB manual)
861 */
862 static BOOL elf_locate_debug_link(struct image_file_map* fmap, const char* filename,
863 const WCHAR* loaded_file, DWORD crc)
864 {
865 static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
866 static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
867 const size_t globalDebugDirLen = sizeof(globalDebugDirW) / sizeof(WCHAR);
868 size_t filename_len;
869 WCHAR* p = NULL;
870 WCHAR* slash;
871 struct image_file_map* fmap_link = NULL;
872
873 fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
874 if (!fmap_link) return FALSE;
875
876 filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
877 p = HeapAlloc(GetProcessHeap(), 0,
878 (globalDebugDirLen + strlenW(loaded_file) + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
879 if (!p) goto found;
880
881 /* we prebuild the string with "execdir" */
882 strcpyW(p, loaded_file);
883 slash = strrchrW(p, '/');
884 if (slash == NULL) slash = p; else slash++;
885
886 /* testing execdir/filename */
887 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
888 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
889
890 /* testing execdir/.debug/filename */
891 memcpy(slash, dotDebugW, sizeof(dotDebugW));
892 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + sizeof(dotDebugW) / sizeof(WCHAR), filename_len);
893 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
894
895 /* testing globaldebugdir/execdir/filename */
896 memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
897 memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
898 slash += globalDebugDirLen;
899 MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
900 if (elf_check_debug_link(p, fmap_link, crc)) goto found;
901
902 /* finally testing filename */
903 if (elf_check_debug_link(slash, fmap_link, crc)) goto found;
904
905
906 WARN("Couldn't locate or map %s\n", filename);
907 HeapFree(GetProcessHeap(), 0, p);
908 HeapFree(GetProcessHeap(), 0, fmap_link);
909 return FALSE;
910
911 found:
912 TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
913 HeapFree(GetProcessHeap(), 0, p);
914 fmap->u.elf.alternate = fmap_link;
915 return TRUE;
916 }
917
918 /******************************************************************
919 * elf_locate_build_id_target
920 *
921 * Try to find the .so file containing the debug info out of the build-id note information
922 */
923 static BOOL elf_locate_build_id_target(struct image_file_map* fmap, const BYTE* id, unsigned idlen)
924 {
925 static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
926 static const WCHAR buildidW[] = {'.','b','u','i','l','d','-','i','d','/'};
927 static const WCHAR dotDebug0W[] = {'.','d','e','b','u','g',0};
928 struct image_file_map* fmap_link = NULL;
929 WCHAR* p;
930 WCHAR* z;
931 const BYTE* idend = id + idlen;
932 struct elf_map_file_data emfd;
933
934 fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
935 if (!fmap_link) return FALSE;
936
937 p = HeapAlloc(GetProcessHeap(), 0,
938 sizeof(globalDebugDirW) + sizeof(buildidW) +
939 (idlen * 2 + 1) * sizeof(WCHAR) + sizeof(dotDebug0W));
940 z = p;
941 memcpy(z, globalDebugDirW, sizeof(globalDebugDirW));
942 z += sizeof(globalDebugDirW) / sizeof(WCHAR);
943 memcpy(z, buildidW, sizeof(buildidW));
944 z += sizeof(buildidW) / sizeof(WCHAR);
945
946 if (id < idend)
947 {
948 *z++ = "0123456789abcdef"[*id >> 4 ];
949 *z++ = "0123456789abcdef"[*id & 0x0F];
950 id++;
951 }
952 if (id < idend)
953 *z++ = '/';
954 while (id < idend)
955 {
956 *z++ = "0123456789abcdef"[*id >> 4 ];
957 *z++ = "0123456789abcdef"[*id & 0x0F];
958 id++;
959 }
960 memcpy(z, dotDebug0W, sizeof(dotDebug0W));
961 TRACE("checking %s\n", wine_dbgstr_w(p));
962
963 emfd.kind = from_file;
964 emfd.u.file.filename = p;
965 if (elf_map_file(&emfd, fmap_link))
966 {
967 struct image_section_map buildid_sect;
968 if (elf_find_section(fmap_link, ".note.gnu.build-id", SHT_NULL, &buildid_sect))
969 {
970 const uint32_t* note;
971
972 note = (const uint32_t*)image_map_section(&buildid_sect);
973 if (note != IMAGE_NO_MAP)
974 {
975 /* the usual ELF note structure: name-size desc-size type <name> <desc> */
976 if (note[2] == NT_GNU_BUILD_ID)
977 {
978 if (note[1] == idlen &&
979 !memcmp(note + 3 + ((note[0] + 3) >> 2), idend - idlen, idlen))
980 {
981 TRACE("Located debug information file at %s\n", debugstr_w(p));
982 HeapFree(GetProcessHeap(), 0, p);
983 fmap->u.elf.alternate = fmap_link;
984 return TRUE;
985 }
986 WARN("mismatch in buildid information for %s\n", wine_dbgstr_w(p));
987 }
988 }
989 image_unmap_section(&buildid_sect);
990 }
991 elf_unmap_file(fmap_link);
992 }
993
994 TRACE("not found\n");
995 HeapFree(GetProcessHeap(), 0, p);
996 HeapFree(GetProcessHeap(), 0, fmap_link);
997 return FALSE;
998 }
999
1000 /******************************************************************
1001 * elf_check_alternate
1002 *
1003 * Load alternate files for a given ELF file, looking at either .note.gnu_build-id
1004 * or .gnu_debuglink sections.
1005 */
1006 static BOOL elf_check_alternate(struct image_file_map* fmap, const struct module* module)
1007 {
1008 BOOL ret = FALSE;
1009 BOOL found = FALSE;
1010 struct image_section_map buildid_sect, debuglink_sect;
1011
1012 /* if present, add the .gnu_debuglink file as an alternate to current one */
1013 if (elf_find_section(fmap, ".note.gnu.build-id", SHT_NULL, &buildid_sect))
1014 {
1015 const uint32_t* note;
1016
1017 found = TRUE;
1018 note = (const uint32_t*)image_map_section(&buildid_sect);
1019 if (note != IMAGE_NO_MAP)
1020 {
1021 /* the usual ELF note structure: name-size desc-size type <name> <desc> */
1022 if (note[2] == NT_GNU_BUILD_ID)
1023 {
1024 ret = elf_locate_build_id_target(fmap, (const BYTE*)(note + 3 + ((note[0] + 3) >> 2)), note[1]);
1025 }
1026 }
1027 image_unmap_section(&buildid_sect);
1028 }
1029 /* if present, add the .gnu_debuglink file as an alternate to current one */
1030 if (!ret && elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
1031 {
1032 const char* dbg_link;
1033
1034 found = TRUE;
1035 dbg_link = (const char*)image_map_section(&debuglink_sect);
1036 if (dbg_link != IMAGE_NO_MAP)
1037 {
1038 /* The content of a debug link section is:
1039 * 1/ a NULL terminated string, containing the file name for the
1040 * debug info
1041 * 2/ padding on 4 byte boundary
1042 * 3/ CRC of the linked ELF file
1043 */
1044 DWORD crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
1045 ret = elf_locate_debug_link(fmap, dbg_link, module->module.LoadedImageName, crc);
1046 if (!ret)
1047 WARN("Couldn't load linked debug file for %s\n",
1048 debugstr_w(module->module.ModuleName));
1049 }
1050 image_unmap_section(&debuglink_sect);
1051 }
1052 return found ? ret : TRUE;
1053 }
1054
1055 /******************************************************************
1056 * elf_load_debug_info_from_map
1057 *
1058 * Loads the symbolic information from ELF module which mapping is described
1059 * in fmap
1060 * the module has been loaded at 'load_offset' address, so symbols' address
1061 * relocation is performed.
1062 * CRC is checked if fmap->with_crc is TRUE
1063 * returns
1064 * 0 if the file doesn't contain symbolic info (or this info cannot be
1065 * read or parsed)
1066 * 1 on success
1067 */
1068 static BOOL elf_load_debug_info_from_map(struct module* module,
1069 struct image_file_map* fmap,
1070 struct pool* pool,
1071 struct hash_table* ht_symtab)
1072 {
1073 BOOL ret = FALSE, lret;
1074 struct elf_thunk_area thunks[] =
1075 {
1076 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
1077 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1078 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1079 {"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1080 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
1081 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
1082 {NULL, 0, 0, 0}
1083 };
1084
1085 module->module.SymType = SymExport;
1086
1087 /* create a hash table for the symtab */
1088 elf_hash_symtab(module, pool, ht_symtab, fmap, thunks);
1089
1090 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1091 {
1092 struct image_section_map stab_sect, stabstr_sect;
1093
1094 /* check if we need an alternate file (from debuglink or build-id) */
1095 ret = elf_check_alternate(fmap, module);
1096
1097 if (elf_find_section(fmap, ".stab", SHT_NULL, &stab_sect) &&
1098 elf_find_section(fmap, ".stabstr", SHT_NULL, &stabstr_sect))
1099 {
1100 const char* stab;
1101 const char* stabstr;
1102
1103 stab = image_map_section(&stab_sect);
1104 stabstr = image_map_section(&stabstr_sect);
1105 if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
1106 {
1107 /* OK, now just parse all of the stabs. */
1108 lret = stabs_parse(module, module->format_info[DFI_ELF]->u.elf_info->elf_addr,
1109 stab, image_get_map_size(&stab_sect),
1110 stabstr, image_get_map_size(&stabstr_sect),
1111 NULL, NULL);
1112 if (lret)
1113 /* and fill in the missing information for stabs */
1114 elf_finish_stabs_info(module, ht_symtab);
1115 else
1116 WARN("Couldn't correctly read stabs\n");
1117 ret = ret || lret;
1118 }
1119 image_unmap_section(&stab_sect);
1120 image_unmap_section(&stabstr_sect);
1121 }
1122 lret = dwarf2_parse(module, module->reloc_delta, thunks, fmap);
1123 ret = ret || lret;
1124 }
1125 if (strstrW(module->module.ModuleName, S_ElfW) ||
1126 !strcmpW(module->module.ModuleName, S_WineLoaderW))
1127 {
1128 /* add the thunks for native libraries */
1129 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1130 elf_new_wine_thunks(module, ht_symtab, thunks);
1131 }
1132 /* add all the public symbols from symtab */
1133 if (elf_new_public_symbols(module, ht_symtab) && !ret) ret = TRUE;
1134
1135 return ret;
1136 }
1137
1138 /******************************************************************
1139 * elf_load_debug_info
1140 *
1141 * Loads ELF debugging information from the module image file.
1142 */
1143 BOOL elf_load_debug_info(struct module* module)
1144 {
1145 BOOL ret = TRUE;
1146 struct pool pool;
1147 struct hash_table ht_symtab;
1148 struct module_format* modfmt;
1149
1150 if (module->type != DMT_ELF || !(modfmt = module->format_info[DFI_ELF]) || !modfmt->u.elf_info)
1151 {
1152 ERR("Bad elf module '%s'\n", debugstr_w(module->module.LoadedImageName));
1153 return FALSE;
1154 }
1155
1156 pool_init(&pool, 65536);
1157 hash_table_init(&pool, &ht_symtab, 256);
1158
1159 ret = elf_load_debug_info_from_map(module, &modfmt->u.elf_info->file_map, &pool, &ht_symtab);
1160
1161 pool_destroy(&pool);
1162 return ret;
1163 }
1164
1165 /******************************************************************
1166 * elf_fetch_file_info
1167 *
1168 * Gathers some more information for an ELF module from a given file
1169 */
1170 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1171 DWORD* size, DWORD* checksum)
1172 {
1173 struct image_file_map fmap;
1174
1175 struct elf_map_file_data emfd;
1176
1177 emfd.kind = from_file;
1178 emfd.u.file.filename = name;
1179 if (!elf_map_file(&emfd, &fmap)) return FALSE;
1180 if (base) *base = fmap.u.elf.elf_start;
1181 *size = fmap.u.elf.elf_size;
1182 *checksum = calc_crc32(fmap.u.elf.fd);
1183 elf_unmap_file(&fmap);
1184 return TRUE;
1185 }
1186
1187 static BOOL elf_load_file_from_fmap(struct process* pcs, const WCHAR* filename,
1188 struct image_file_map* fmap, unsigned long load_offset,
1189 unsigned long dyn_addr, struct elf_info* elf_info)
1190 {
1191 BOOL ret = FALSE;
1192
1193 if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
1194 {
1195 struct image_section_map ism;
1196
1197 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1198 {
1199 Elf_Dyn dyn;
1200 char* ptr = (char*)fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1201 unsigned long len;
1202
1203 do
1204 {
1205 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1206 len != sizeof(dyn))
1207 return ret;
1208 if (dyn.d_tag == DT_DEBUG)
1209 {
1210 elf_info->dbg_hdr_addr = dyn.d_un.d_ptr;
1211 if (load_offset == 0 && dyn_addr == 0) /* likely the case */
1212 /* Assume this module (the Wine loader) has been loaded at its preferred address */
1213 dyn_addr = ism.fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1214 break;
1215 }
1216 ptr += sizeof(dyn);
1217 } while (dyn.d_tag != DT_NULL);
1218 if (dyn.d_tag == DT_NULL) return ret;
1219 }
1220 elf_end_find(fmap);
1221 }
1222
1223 if (elf_info->flags & ELF_INFO_MODULE)
1224 {
1225 struct elf_module_info *elf_module_info;
1226 struct module_format* modfmt;
1227 struct image_section_map ism;
1228 unsigned long modbase = load_offset;
1229
1230 if (elf_find_section(fmap, ".dynamic", SHT_DYNAMIC, &ism))
1231 {
1232 unsigned long rva_dyn = elf_get_map_rva(&ism);
1233
1234 TRACE("For module %s, got ELF (start=%lx dyn=%lx), link_map (start=%lx dyn=%lx)\n",
1235 debugstr_w(filename), (unsigned long)fmap->u.elf.elf_start, rva_dyn,
1236 load_offset, dyn_addr);
1237 if (dyn_addr && load_offset + rva_dyn != dyn_addr)
1238 {
1239 WARN("\thave to relocate: %lx\n", dyn_addr - rva_dyn);
1240 modbase = dyn_addr - rva_dyn;
1241 }
1242 } else WARN("For module %s, no .dynamic section\n", debugstr_w(filename));
1243 elf_end_find(fmap);
1244
1245 modfmt = HeapAlloc(GetProcessHeap(), 0,
1246 sizeof(struct module_format) + sizeof(struct elf_module_info));
1247 if (!modfmt) return FALSE;
1248 elf_info->module = module_new(pcs, filename, DMT_ELF, FALSE, modbase,
1249 fmap->u.elf.elf_size, 0, calc_crc32(fmap->u.elf.fd));
1250 if (!elf_info->module)
1251 {
1252 HeapFree(GetProcessHeap(), 0, modfmt);
1253 return FALSE;
1254 }
1255 elf_info->module->reloc_delta = elf_info->module->module.BaseOfImage - fmap->u.elf.elf_start;
1256 elf_module_info = (void*)(modfmt + 1);
1257 elf_info->module->format_info[DFI_ELF] = modfmt;
1258 modfmt->module = elf_info->module;
1259 modfmt->remove = elf_module_remove;
1260 modfmt->loc_compute = NULL;
1261 modfmt->u.elf_info = elf_module_info;
1262
1263 elf_module_info->elf_addr = load_offset;
1264
1265 elf_module_info->file_map = *fmap;
1266 elf_reset_file_map(fmap);
1267 if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
1268 {
1269 elf_info->module->module.SymType = SymDeferred;
1270 ret = TRUE;
1271 }
1272 else ret = elf_load_debug_info(elf_info->module);
1273
1274 elf_module_info->elf_mark = 1;
1275 elf_module_info->elf_loader = 0;
1276 } else ret = TRUE;
1277
1278 if (elf_info->flags & ELF_INFO_NAME)
1279 {
1280 WCHAR* ptr;
1281 ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1) * sizeof(WCHAR));
1282 if (ptr)
1283 {
1284 strcpyW(ptr, filename);
1285 elf_info->module_name = ptr;
1286 }
1287 else ret = FALSE;
1288 }
1289
1290 return ret;
1291 }
1292
1293 /******************************************************************
1294 * elf_load_file
1295 *
1296 * Loads the information for ELF module stored in 'filename'
1297 * the module has been loaded at 'load_offset' address
1298 * returns
1299 * -1 if the file cannot be found/opened
1300 * 0 if the file doesn't contain symbolic info (or this info cannot be
1301 * read or parsed)
1302 * 1 on success
1303 */
1304 static BOOL elf_load_file(struct process* pcs, const WCHAR* filename,
1305 unsigned long load_offset, unsigned long dyn_addr,
1306 struct elf_info* elf_info)
1307 {
1308 BOOL ret = FALSE;
1309 struct image_file_map fmap;
1310 struct elf_map_file_data emfd;
1311
1312 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename), load_offset);
1313
1314 emfd.kind = from_file;
1315 emfd.u.file.filename = filename;
1316 if (!elf_map_file(&emfd, &fmap)) return ret;
1317
1318 /* Next, we need to find a few of the internal ELF headers within
1319 * this thing. We need the main executable header, and the section
1320 * table.
1321 */
1322 if (!fmap.u.elf.elf_start && !load_offset)
1323 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1324 debugstr_w(filename));
1325
1326 ret = elf_load_file_from_fmap(pcs, filename, &fmap, load_offset, dyn_addr, elf_info);
1327
1328 elf_unmap_file(&fmap);
1329
1330 return ret;
1331 }
1332
1333 /******************************************************************
1334 * elf_load_file_from_path
1335 * tries to load an ELF file from a set of paths (separated by ':')
1336 */
1337 static BOOL elf_load_file_from_path(HANDLE hProcess,
1338 const WCHAR* filename,
1339 unsigned long load_offset,
1340 unsigned long dyn_addr,
1341 const char* path,
1342 struct elf_info* elf_info)
1343 {
1344 BOOL ret = FALSE;
1345 WCHAR *s, *t, *fn;
1346 WCHAR* pathW = NULL;
1347 unsigned len;
1348
1349 if (!path) return FALSE;
1350
1351 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1352 pathW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
1353 if (!pathW) return FALSE;
1354 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, pathW, len);
1355
1356 for (s = pathW; s && *s; s = (t) ? (t+1) : NULL)
1357 {
1358 t = strchrW(s, ':');
1359 if (t) *t = '\0';
1360 fn = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1 + lstrlenW(s) + 1) * sizeof(WCHAR));
1361 if (!fn) break;
1362 strcpyW(fn, s);
1363 strcatW(fn, S_SlashW);
1364 strcatW(fn, filename);
1365 ret = elf_load_file(hProcess, fn, load_offset, dyn_addr, elf_info);
1366 HeapFree(GetProcessHeap(), 0, fn);
1367 if (ret) break;
1368 }
1369
1370 HeapFree(GetProcessHeap(), 0, pathW);
1371 return ret;
1372 }
1373
1374 /******************************************************************
1375 * elf_load_file_from_dll_path
1376 *
1377 * Tries to load an ELF file from the dll path
1378 */
1379 static BOOL elf_load_file_from_dll_path(HANDLE hProcess,
1380 const WCHAR* filename,
1381 unsigned long load_offset,
1382 unsigned long dyn_addr,
1383 struct elf_info* elf_info)
1384 {
1385 BOOL ret = FALSE;
1386 unsigned int index = 0;
1387 const char *path;
1388
1389 while (!ret && (path = wine_dll_enum_load_path( index++ )))
1390 {
1391 WCHAR *name;
1392 unsigned len;
1393
1394 len = MultiByteToWideChar(CP_UNIXCP, 0, path, -1, NULL, 0);
1395
1396 name = HeapAlloc( GetProcessHeap(), 0,
1397 (len + lstrlenW(filename) + 2) * sizeof(WCHAR) );
1398
1399 if (!name) break;
1400 MultiByteToWideChar(CP_UNIXCP, 0, path, -1, name, len);
1401 strcatW( name, S_SlashW );
1402 strcatW( name, filename );
1403 ret = elf_load_file(hProcess, name, load_offset, dyn_addr, elf_info);
1404 HeapFree( GetProcessHeap(), 0, name );
1405 }
1406 return ret;
1407 }
1408
1409 #ifdef AT_SYSINFO_EHDR
1410 /******************************************************************
1411 * elf_search_auxv
1412 *
1413 * locate some a value from the debuggee auxiliary vector
1414 */
1415 static BOOL elf_search_auxv(const struct process* pcs, unsigned type, unsigned long* val)
1416 {
1417 char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
1418 SYMBOL_INFO*si = (SYMBOL_INFO*)buffer;
1419 void* addr;
1420 void* str;
1421 void* str_max;
1422 Elf_auxv_t auxv;
1423
1424 si->SizeOfStruct = sizeof(*si);
1425 si->MaxNameLen = MAX_SYM_NAME;
1426 if (!SymFromName(pcs->handle, "libwine.so.1!__wine_main_environ", si) ||
1427 !(addr = (void*)(DWORD_PTR)si->Address) ||
1428 !ReadProcessMemory(pcs->handle, addr, &addr, sizeof(addr), NULL) ||
1429 !addr)
1430 {
1431 FIXME("can't find symbol in module\n");
1432 return FALSE;
1433 }
1434 /* walk through envp[] */
1435 /* envp[] strings are located after the auxiliary vector, so protect the walk */
1436 str_max = (void*)(DWORD_PTR)~0L;
1437 while (ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) &&
1438 (addr = (void*)((DWORD_PTR)addr + sizeof(str))) != NULL && str != NULL)
1439 str_max = min(str_max, str);
1440
1441 /* Walk through the end of envp[] array.
1442 * Actually, there can be several NULLs at the end of envp[]. This happens when an env variable is
1443 * deleted, the last entry is replaced by an extra NULL.
1444 */
1445 while (addr < str_max && ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) && str == NULL)
1446 addr = (void*)((DWORD_PTR)addr + sizeof(str));
1447
1448 while (ReadProcessMemory(pcs->handle, addr, &auxv, sizeof(auxv), NULL) && auxv.a_type != AT_NULL)
1449 {
1450 if (auxv.a_type == type)
1451 {
1452 *val = auxv.a_un.a_val;
1453 return TRUE;
1454 }
1455 addr = (void*)((DWORD_PTR)addr + sizeof(auxv));
1456 }
1457
1458 return FALSE;
1459 }
1460 #endif
1461
1462 /******************************************************************
1463 * elf_search_and_load_file
1464 *
1465 * lookup a file in standard ELF locations, and if found, load it
1466 */
1467 static BOOL elf_search_and_load_file(struct process* pcs, const WCHAR* filename,
1468 unsigned long load_offset, unsigned long dyn_addr,
1469 struct elf_info* elf_info)
1470 {
1471 BOOL ret = FALSE;
1472 struct module* module;
1473 static const WCHAR S_libstdcPPW[] = {'l','i','b','s','t','d','c','+','+','\0'};
1474
1475 if (filename == NULL || *filename == '\0') return FALSE;
1476 if ((module = module_is_already_loaded(pcs, filename)))
1477 {
1478 elf_info->module = module;
1479 elf_info->module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1480 return module->module.SymType;
1481 }
1482
1483 if (strstrW(filename, S_libstdcPPW)) return FALSE; /* We know we can't do it */
1484 ret = elf_load_file(pcs, filename, load_offset, dyn_addr, elf_info);
1485 /* if relative pathname, try some absolute base dirs */
1486 if (!ret && !strchrW(filename, '/'))
1487 {
1488 ret = elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1489 getenv("PATH"), elf_info) ||
1490 elf_load_file_from_path(pcs, filename, load_offset, dyn_addr,
1491 getenv("LD_LIBRARY_PATH"), elf_info);
1492 if (!ret) ret = elf_load_file_from_dll_path(pcs, filename,
1493 load_offset, dyn_addr, elf_info);
1494 }
1495
1496 return ret;
1497 }
1498
1499 typedef BOOL (*enum_elf_modules_cb)(const WCHAR*, unsigned long load_addr,
1500 unsigned long dyn_addr, BOOL is_system, void* user);
1501
1502 /******************************************************************
1503 * elf_enum_modules_internal
1504 *
1505 * Enumerate ELF modules from a running process
1506 */
1507 static BOOL elf_enum_modules_internal(const struct process* pcs,
1508 const WCHAR* main_name,
1509 enum_elf_modules_cb cb, void* user)
1510 {
1511 struct r_debug dbg_hdr;
1512 void* lm_addr;
1513 struct link_map lm;
1514 char bufstr[256];
1515 WCHAR bufstrW[MAX_PATH];
1516
1517 if (!pcs->dbg_hdr_addr ||
1518 !ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr,
1519 &dbg_hdr, sizeof(dbg_hdr), NULL))
1520 return FALSE;
1521
1522 /* Now walk the linked list. In all known ELF implementations,
1523 * the dynamic loader maintains this linked list for us. In some
1524 * cases the first entry doesn't appear with a name, in other cases it
1525 * does.
1526 */
1527 for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
1528 {
1529 if (!ReadProcessMemory(pcs->handle, lm_addr, &lm, sizeof(lm), NULL))
1530 return FALSE;
1531
1532 if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
1533 lm.l_name != NULL &&
1534 ReadProcessMemory(pcs->handle, lm.l_name, bufstr, sizeof(bufstr), NULL))
1535 {
1536 bufstr[sizeof(bufstr) - 1] = '\0';
1537 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, sizeof(bufstrW) / sizeof(WCHAR));
1538 if (main_name && !bufstrW[0]) strcpyW(bufstrW, main_name);
1539 if (!cb(bufstrW, (unsigned long)lm.l_addr, (unsigned long)lm.l_ld, FALSE, user)) break;
1540 }
1541 }
1542
1543 #ifdef AT_SYSINFO_EHDR
1544 if (!lm_addr)
1545 {
1546 unsigned long ehdr_addr;
1547
1548 if (elf_search_auxv(pcs, AT_SYSINFO_EHDR, &ehdr_addr))
1549 {
1550 static const WCHAR vdsoW[] = {'[','v','d','s','o',']','.','s','o',0};
1551 cb(vdsoW, ehdr_addr, 0, TRUE, user);
1552 }
1553 }
1554 #endif
1555 return TRUE;
1556 }
1557
1558 /******************************************************************
1559 * elf_search_loader
1560 *
1561 * Lookup in a running ELF process the loader, and sets its ELF link
1562 * address (for accessing the list of loaded .so libs) in pcs.
1563 * If flags is ELF_INFO_MODULE, the module for the loader is also
1564 * added as a module into pcs.
1565 */
1566 static BOOL elf_search_loader(struct process* pcs, struct elf_info* elf_info)
1567 {
1568 return elf_search_and_load_file(pcs, get_wine_loader_name(), 0, 0, elf_info);
1569 }
1570
1571 /******************************************************************
1572 * elf_read_wine_loader_dbg_info
1573 *
1574 * Try to find a decent wine executable which could have loaded the debuggee
1575 */
1576 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1577 {
1578 struct elf_info elf_info;
1579
1580 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
1581 if (!elf_search_loader(pcs, &elf_info)) return FALSE;
1582 elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_loader = 1;
1583 module_set_module(elf_info.module, S_WineLoaderW);
1584 return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
1585 }
1586
1587 struct elf_enum_user
1588 {
1589 enum_modules_cb cb;
1590 void* user;
1591 };
1592
1593 static BOOL elf_enum_modules_translate(const WCHAR* name, unsigned long load_addr,
1594 unsigned long dyn_addr, BOOL is_system, void* user)
1595 {
1596 struct elf_enum_user* eeu = user;
1597 return eeu->cb(name, load_addr, eeu->user);
1598 }
1599
1600 /******************************************************************
1601 * elf_enum_modules
1602 *
1603 * Enumerates the ELF loaded modules from a running target (hProc)
1604 * This function doesn't require that someone has called SymInitialize
1605 * on this very process.
1606 */
1607 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1608 {
1609 struct process pcs;
1610 struct elf_info elf_info;
1611 BOOL ret;
1612 struct elf_enum_user eeu;
1613
1614 memset(&pcs, 0, sizeof(pcs));
1615 pcs.handle = hProc;
1616 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_NAME;
1617 if (!elf_search_loader(&pcs, &elf_info)) return FALSE;
1618 pcs.dbg_hdr_addr = elf_info.dbg_hdr_addr;
1619 eeu.cb = cb;
1620 eeu.user = user;
1621 ret = elf_enum_modules_internal(&pcs, elf_info.module_name, elf_enum_modules_translate, &eeu);
1622 HeapFree(GetProcessHeap(), 0, (char*)elf_info.module_name);
1623 return ret;
1624 }
1625
1626 struct elf_load
1627 {
1628 struct process* pcs;
1629 struct elf_info elf_info;
1630 const WCHAR* name;
1631 BOOL ret;
1632 };
1633
1634 /******************************************************************
1635 * elf_load_cb
1636 *
1637 * Callback for elf_load_module, used to walk the list of loaded
1638 * modules.
1639 */
1640 static BOOL elf_load_cb(const WCHAR* name, unsigned long load_addr,
1641 unsigned long dyn_addr, BOOL is_system, void* user)
1642 {
1643 struct elf_load* el = user;
1644 BOOL ret = TRUE;
1645 const WCHAR* p;
1646
1647 if (is_system) /* virtual ELF module, created by system. handle it from memory */
1648 {
1649 struct module* module;
1650 struct elf_map_file_data emfd;
1651 struct image_file_map fmap;
1652
1653 if ((module = module_is_already_loaded(el->pcs, name)))
1654 {
1655 el->elf_info.module = module;
1656 el->elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1657 return module->module.SymType;
1658 }
1659
1660 emfd.kind = from_process;
1661 emfd.u.process.handle = el->pcs->handle;
1662 emfd.u.process.load_addr = (void*)load_addr;
1663
1664 if (elf_map_file(&emfd, &fmap))
1665 el->ret = elf_load_file_from_fmap(el->pcs, name, &fmap, load_addr, 0, &el->elf_info);
1666 return TRUE;
1667 }
1668 if (el->name)
1669 {
1670 /* memcmp is needed for matches when bufstr contains also version information
1671 * el->name: libc.so, name: libc.so.6.0
1672 */
1673 p = strrchrW(name, '/');
1674 if (!p++) p = name;
1675 }
1676
1677 if (!el->name || !memcmp(p, el->name, lstrlenW(el->name) * sizeof(WCHAR)))
1678 {
1679 el->ret = elf_search_and_load_file(el->pcs, name, load_addr, dyn_addr, &el->elf_info);
1680 if (el->name) ret = FALSE;
1681 }
1682
1683 return ret;
1684 }
1685
1686 /******************************************************************
1687 * elf_load_module
1688 *
1689 * loads an ELF module and stores it in process' module list
1690 * Also, find module real name and load address from
1691 * the real loaded modules list in pcs address space
1692 */
1693 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1694 {
1695 struct elf_load el;
1696
1697 TRACE("(%p %s %08lx)\n", pcs, debugstr_w(name), addr);
1698
1699 el.elf_info.flags = ELF_INFO_MODULE;
1700 el.ret = FALSE;
1701
1702 if (pcs->dbg_hdr_addr) /* we're debugging a life target */
1703 {
1704 el.pcs = pcs;
1705 /* do only the lookup from the filename, not the path (as we lookup module
1706 * name in the process' loaded module list)
1707 */
1708 el.name = strrchrW(name, '/');
1709 if (!el.name++) el.name = name;
1710 el.ret = FALSE;
1711
1712 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1713 return NULL;
1714 }
1715 else if (addr)
1716 {
1717 el.name = name;
1718 el.ret = elf_search_and_load_file(pcs, el.name, addr, 0, &el.elf_info);
1719 }
1720 if (!el.ret) return NULL;
1721 assert(el.elf_info.module);
1722 return el.elf_info.module;
1723 }
1724
1725 /******************************************************************
1726 * elf_synchronize_module_list
1727 *
1728 * this function rescans the debuggee module's list and synchronizes it with
1729 * the one from 'pcs', i.e.:
1730 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1731 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1732 */
1733 BOOL elf_synchronize_module_list(struct process* pcs)
1734 {
1735 struct module* module;
1736 struct elf_load el;
1737
1738 for (module = pcs->lmodules; module; module = module->next)
1739 {
1740 if (module->type == DMT_ELF && !module->is_virtual)
1741 module->format_info[DFI_ELF]->u.elf_info->elf_mark = 0;
1742 }
1743
1744 el.pcs = pcs;
1745 el.elf_info.flags = ELF_INFO_MODULE;
1746 el.ret = FALSE;
1747 el.name = NULL; /* fetch all modules */
1748
1749 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1750 return FALSE;
1751
1752 module = pcs->lmodules;
1753 while (module)
1754 {
1755 if (module->type == DMT_ELF && !module->is_virtual)
1756 {
1757 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
1758
1759 if (!elf_info->elf_mark && !elf_info->elf_loader)
1760 {
1761 module_remove(pcs, module);
1762 /* restart all over */
1763 module = pcs->lmodules;
1764 continue;
1765 }
1766 }
1767 module = module->next;
1768 }
1769 return TRUE;
1770 }
1771
1772 #else /* !__ELF__ */
1773
1774 BOOL elf_find_section(struct image_file_map* fmap, const char* name,
1775 unsigned sht, struct image_section_map* ism)
1776 {
1777 return FALSE;
1778 }
1779
1780 const char* elf_map_section(struct image_section_map* ism)
1781 {
1782 return NULL;
1783 }
1784
1785 void elf_unmap_section(struct image_section_map* ism)
1786 {}
1787
1788 unsigned elf_get_map_size(const struct image_section_map* ism)
1789 {
1790 return 0;
1791 }
1792
1793 DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
1794 {
1795 return 0;
1796 }
1797
1798 BOOL elf_synchronize_module_list(struct process* pcs)
1799 {
1800 return FALSE;
1801 }
1802
1803 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
1804 DWORD* size, DWORD* checksum)
1805 {
1806 return FALSE;
1807 }
1808
1809 BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
1810 {
1811 return FALSE;
1812 }
1813
1814 BOOL elf_enum_modules(HANDLE hProc, enum_modules_cb cb, void* user)
1815 {
1816 return FALSE;
1817 }
1818
1819 struct module* elf_load_module(struct process* pcs, const WCHAR* name, unsigned long addr)
1820 {
1821 return NULL;
1822 }
1823
1824 BOOL elf_load_debug_info(struct module* module)
1825 {
1826 return FALSE;
1827 }
1828
1829 int elf_is_in_thunk_area(unsigned long addr,
1830 const struct elf_thunk_area* thunks)
1831 {
1832 return -1;
1833 }
1834 #endif /* __ELF__ */
Windows API implementation