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[WINESYNC] dbghelp: Always check for debug symbols in BINDIR.
[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 <assert.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25
26 #include "dbghelp_private.h"
27 #include "image_private.h"
28 #include "winternl.h"
29
30 #include "wine/debug.h"
31 #include "wine/heap.h"
32
33 #define ELF_INFO_DEBUG_HEADER 0x0001
34 #define ELF_INFO_MODULE 0x0002
35 #define ELF_INFO_NAME 0x0004
36
37 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
38
39 struct elf_info
40 {
41 unsigned flags; /* IN one (or several) of the ELF_INFO constants */
42 DWORD_PTR dbg_hdr_addr; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
43 struct module* module; /* OUT loaded module (if ELF_INFO_MODULE is set) */
44 const WCHAR* module_name; /* OUT found module name (if ELF_INFO_NAME is set) */
45 };
46
47 struct elf_sym32
48 {
49 UINT32 st_name; /* Symbol name (string tbl index) */
50 UINT32 st_value; /* Symbol value */
51 UINT32 st_size; /* Symbol size */
52 UINT8 st_info; /* Symbol type and binding */
53 UINT8 st_other; /* Symbol visibility */
54 UINT16 st_shndx; /* Section index */
55 };
56
57 struct elf_sym
58 {
59 UINT32 st_name; /* Symbol name (string tbl index) */
60 UINT8 st_info; /* Symbol type and binding */
61 UINT8 st_other; /* Symbol visibility */
62 UINT16 st_shndx; /* Section index */
63 UINT64 st_value; /* Symbol value */
64 UINT64 st_size; /* Symbol size */
65 };
66
67 struct symtab_elt
68 {
69 struct hash_table_elt ht_elt;
70 struct elf_sym sym;
71 struct symt_compiland* compiland;
72 unsigned used;
73 };
74
75 struct elf_thunk_area
76 {
77 const char* symname;
78 THUNK_ORDINAL ordinal;
79 ULONG_PTR rva_start;
80 ULONG_PTR rva_end;
81 };
82
83 struct elf_module_info
84 {
85 ULONG_PTR elf_addr;
86 unsigned short elf_mark : 1,
87 elf_loader : 1;
88 struct image_file_map file_map;
89 };
90
91 /* Legal values for sh_type (section type). */
92 #define ELF_SHT_NULL 0 /* Section header table entry unused */
93 #define ELF_SHT_PROGBITS 1 /* Program data */
94 #define ELF_SHT_SYMTAB 2 /* Symbol table */
95 #define ELF_SHT_STRTAB 3 /* String table */
96 #define ELF_SHT_RELA 4 /* Relocation entries with addends */
97 #define ELF_SHT_HASH 5 /* Symbol hash table */
98 #define ELF_SHT_DYNAMIC 6 /* Dynamic linking information */
99 #define ELF_SHT_NOTE 7 /* Notes */
100 #define ELF_SHT_NOBITS 8 /* Program space with no data (bss) */
101 #define ELF_SHT_REL 9 /* Relocation entries, no addends */
102 #define ELF_SHT_SHLIB 10 /* Reserved */
103 #define ELF_SHT_DYNSYM 11 /* Dynamic linker symbol table */
104 #define ELF_SHT_INIT_ARRAY 14 /* Array of constructors */
105 #define ELF_SHT_FINI_ARRAY 15 /* Array of destructors */
106 #define ELF_SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */
107 #define ELF_SHT_GROUP 17 /* Section group */
108 #define ELF_SHT_SYMTAB_SHNDX 18 /* Extended section indices */
109 #define ELF_SHT_NUM 19 /* Number of defined types. */
110
111 /* Legal values for ST_TYPE subfield of st_info (symbol type). */
112 #define ELF_STT_NOTYPE 0 /* Symbol type is unspecified */
113 #define ELF_STT_OBJECT 1 /* Symbol is a data object */
114 #define ELF_STT_FUNC 2 /* Symbol is a code object */
115 #define ELF_STT_SECTION 3 /* Symbol associated with a section */
116 #define ELF_STT_FILE 4 /* Symbol's name is file name */
117
118 #define ELF_PT_LOAD 1 /* Loadable program segment */
119
120 #define ELF_DT_DEBUG 21 /* For debugging; unspecified */
121
122 #define ELF_AT_SYSINFO_EHDR 33
123
124 /******************************************************************
125 * elf_map_section
126 *
127 * Maps a single section into memory from an ELF file
128 */
129 static const char* elf_map_section(struct image_section_map* ism)
130 {
131 struct elf_file_map* fmap = &ism->fmap->u.elf;
132 SIZE_T ofst, size;
133 HANDLE mapping;
134
135 assert(ism->fmap->modtype == DMT_ELF);
136 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum ||
137 fmap->sect[ism->sidx].shdr.sh_type == ELF_SHT_NOBITS)
138 return IMAGE_NO_MAP;
139
140 if (fmap->target_copy)
141 {
142 return fmap->target_copy + fmap->sect[ism->sidx].shdr.sh_offset;
143 }
144
145 /* align required information on allocation granularity */
146 ofst = fmap->sect[ism->sidx].shdr.sh_offset & ~(sysinfo.dwAllocationGranularity - 1);
147 size = fmap->sect[ism->sidx].shdr.sh_offset + fmap->sect[ism->sidx].shdr.sh_size - ofst;
148 if (!(mapping = CreateFileMappingW(fmap->handle, NULL, PAGE_READONLY, 0, ofst + size, NULL)))
149 {
150 ERR("map creation %p failed %u offset %lu %lu size %lu\n", fmap->handle, GetLastError(), ofst, ofst % 4096, size);
151 return IMAGE_NO_MAP;
152 }
153 fmap->sect[ism->sidx].mapped = MapViewOfFile(mapping, FILE_MAP_READ, 0, ofst, size);
154 CloseHandle(mapping);
155 if (!fmap->sect[ism->sidx].mapped)
156 {
157 ERR("map %p failed %u offset %lu %lu size %lu\n", fmap->handle, GetLastError(), ofst, ofst % 4096, size);
158 return IMAGE_NO_MAP;
159 }
160 return fmap->sect[ism->sidx].mapped + (fmap->sect[ism->sidx].shdr.sh_offset & (sysinfo.dwAllocationGranularity - 1));
161 }
162
163 /******************************************************************
164 * elf_find_section
165 *
166 * Finds a section by name (and type) into memory from an ELF file
167 * or its alternate if any
168 */
169 static BOOL elf_find_section(struct image_file_map* _fmap, const char* name, struct image_section_map* ism)
170 {
171 struct elf_file_map* fmap = &_fmap->u.elf;
172 unsigned i;
173
174 if (fmap->shstrtab == IMAGE_NO_MAP)
175 {
176 struct image_section_map hdr_ism = {_fmap, fmap->elfhdr.e_shstrndx};
177 if ((fmap->shstrtab = elf_map_section(&hdr_ism)) == IMAGE_NO_MAP) return FALSE;
178 }
179 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
180 {
181 if (strcmp(fmap->shstrtab + fmap->sect[i].shdr.sh_name, name) == 0)
182 {
183 ism->fmap = _fmap;
184 ism->sidx = i;
185 return TRUE;
186 }
187 }
188 return FALSE;
189 }
190
191 static BOOL elf_find_section_type(struct image_file_map* _fmap, const char* name, unsigned sht, struct image_section_map* ism)
192 {
193 struct elf_file_map* fmap;
194 unsigned i;
195
196 while (_fmap)
197 {
198 if (_fmap->modtype != DMT_ELF) break;
199 fmap = &_fmap->u.elf;
200 if (fmap->shstrtab == IMAGE_NO_MAP)
201 {
202 struct image_section_map hdr_ism = {_fmap, fmap->elfhdr.e_shstrndx};
203 if ((fmap->shstrtab = elf_map_section(&hdr_ism)) == IMAGE_NO_MAP) break;
204 }
205 for (i = 0; i < fmap->elfhdr.e_shnum; i++)
206 {
207 if (strcmp(fmap->shstrtab + fmap->sect[i].shdr.sh_name, name) == 0 && sht == fmap->sect[i].shdr.sh_type)
208 {
209 ism->fmap = _fmap;
210 ism->sidx = i;
211 return TRUE;
212 }
213 }
214 _fmap = _fmap->alternate;
215 }
216 ism->fmap = NULL;
217 ism->sidx = -1;
218 return FALSE;
219 }
220
221 /******************************************************************
222 * elf_unmap_section
223 *
224 * Unmaps a single section from memory
225 */
226 static void elf_unmap_section(struct image_section_map* ism)
227 {
228 struct elf_file_map* fmap = &ism->fmap->u.elf;
229
230 if (ism->sidx >= 0 && ism->sidx < fmap->elfhdr.e_shnum && !fmap->target_copy &&
231 fmap->sect[ism->sidx].mapped)
232 {
233 if (!UnmapViewOfFile(fmap->sect[ism->sidx].mapped))
234 WARN("Couldn't unmap the section\n");
235 fmap->sect[ism->sidx].mapped = NULL;
236 }
237 }
238
239 static void elf_end_find(struct image_file_map* fmap)
240 {
241 struct image_section_map ism;
242
243 while (fmap && fmap->modtype == DMT_ELF)
244 {
245 ism.fmap = fmap;
246 ism.sidx = fmap->u.elf.elfhdr.e_shstrndx;
247 elf_unmap_section(&ism);
248 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
249 fmap = fmap->alternate;
250 }
251 }
252
253 /******************************************************************
254 * elf_get_map_rva
255 *
256 * Get the RVA of an ELF section
257 */
258 static DWORD_PTR elf_get_map_rva(const struct image_section_map* ism)
259 {
260 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
261 return 0;
262 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_addr - ism->fmap->u.elf.elf_start;
263 }
264
265 /******************************************************************
266 * elf_get_map_size
267 *
268 * Get the size of an ELF section
269 */
270 static unsigned elf_get_map_size(const struct image_section_map* ism)
271 {
272 if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.elf.elfhdr.e_shnum)
273 return 0;
274 return ism->fmap->u.elf.sect[ism->sidx].shdr.sh_size;
275 }
276
277 /******************************************************************
278 * elf_unmap_file
279 *
280 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
281 */
282 static void elf_unmap_file(struct image_file_map* fmap)
283 {
284 if (fmap->u.elf.handle != INVALID_HANDLE_VALUE)
285 {
286 struct image_section_map ism;
287 ism.fmap = fmap;
288 for (ism.sidx = 0; ism.sidx < fmap->u.elf.elfhdr.e_shnum; ism.sidx++)
289 {
290 elf_unmap_section(&ism);
291 }
292 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
293 CloseHandle(fmap->u.elf.handle);
294 }
295 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
296 }
297
298 static const struct image_file_map_ops elf_file_map_ops =
299 {
300 elf_map_section,
301 elf_unmap_section,
302 elf_find_section,
303 elf_get_map_rva,
304 elf_get_map_size,
305 elf_unmap_file,
306 };
307
308 static inline void elf_reset_file_map(struct image_file_map* fmap)
309 {
310 fmap->ops = &elf_file_map_ops;
311 fmap->alternate = NULL;
312 fmap->u.elf.handle = INVALID_HANDLE_VALUE;
313 fmap->u.elf.shstrtab = IMAGE_NO_MAP;
314 fmap->u.elf.target_copy = NULL;
315 }
316
317 struct elf_map_file_data
318 {
319 enum {from_file, from_process, from_handle} kind;
320 union
321 {
322 struct
323 {
324 const WCHAR* filename;
325 } file;
326 struct
327 {
328 HANDLE handle;
329 void* load_addr;
330 } process;
331 HANDLE handle;
332 } u;
333 };
334
335 static BOOL elf_map_file_read(struct image_file_map* fmap, struct elf_map_file_data* emfd,
336 void* buf, size_t len, size_t off)
337 {
338 LARGE_INTEGER li;
339 DWORD bytes_read;
340 SIZE_T dw;
341
342 switch (emfd->kind)
343 {
344 case from_file:
345 case from_handle:
346 li.QuadPart = off;
347 if (!SetFilePointerEx(fmap->u.elf.handle, li, NULL, FILE_BEGIN)) return FALSE;
348 return ReadFile(fmap->u.elf.handle, buf, len, &bytes_read, NULL);
349 case from_process:
350 return ReadProcessMemory(emfd->u.process.handle,
351 (void*)((ULONG_PTR)emfd->u.process.load_addr + (ULONG_PTR)off),
352 buf, len, &dw) && dw == len;
353 default:
354 assert(0);
355 return FALSE;
356 }
357 }
358
359 static BOOL elf_map_shdr(struct elf_map_file_data* emfd, struct image_file_map* fmap, unsigned int i)
360 {
361 if (fmap->addr_size == 32)
362 {
363 struct
364 {
365 UINT32 sh_name; /* Section name (string tbl index) */
366 UINT32 sh_type; /* Section type */
367 UINT32 sh_flags; /* Section flags */
368 UINT32 sh_addr; /* Section virtual addr at execution */
369 UINT32 sh_offset; /* Section file offset */
370 UINT32 sh_size; /* Section size in bytes */
371 UINT32 sh_link; /* Link to another section */
372 UINT32 sh_info; /* Additional section information */
373 UINT32 sh_addralign; /* Section alignment */
374 UINT32 sh_entsize; /* Entry size if section holds table */
375 } shdr32;
376
377 if (!elf_map_file_read(fmap, emfd, &shdr32, sizeof(shdr32),
378 fmap->u.elf.elfhdr.e_shoff + i * sizeof(shdr32)))
379 return FALSE;
380
381 fmap->u.elf.sect[i].shdr.sh_name = shdr32.sh_name;
382 fmap->u.elf.sect[i].shdr.sh_type = shdr32.sh_type;
383 fmap->u.elf.sect[i].shdr.sh_flags = shdr32.sh_flags;
384 fmap->u.elf.sect[i].shdr.sh_addr = shdr32.sh_addr;
385 fmap->u.elf.sect[i].shdr.sh_offset = shdr32.sh_offset;
386 fmap->u.elf.sect[i].shdr.sh_size = shdr32.sh_size;
387 fmap->u.elf.sect[i].shdr.sh_link = shdr32.sh_link;
388 fmap->u.elf.sect[i].shdr.sh_info = shdr32.sh_info;
389 fmap->u.elf.sect[i].shdr.sh_addralign = shdr32.sh_addralign;
390 fmap->u.elf.sect[i].shdr.sh_entsize = shdr32.sh_entsize;
391 }
392 else
393 {
394 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.sect[i].shdr, sizeof(fmap->u.elf.sect[i].shdr),
395 fmap->u.elf.elfhdr.e_shoff + i * sizeof(fmap->u.elf.sect[i].shdr)))
396 return FALSE;
397 }
398 return TRUE;
399 }
400
401 /******************************************************************
402 * elf_map_file
403 *
404 * Maps an ELF file into memory (and checks it's a real ELF file)
405 */
406 static BOOL elf_map_file(struct elf_map_file_data* emfd, struct image_file_map* fmap)
407 {
408 unsigned int i;
409 size_t tmp, page_mask = sysinfo.dwPageSize - 1;
410 WCHAR *dos_path;
411 unsigned char e_ident[ARRAY_SIZE(fmap->u.elf.elfhdr.e_ident)];
412
413 elf_reset_file_map(fmap);
414
415 fmap->modtype = DMT_ELF;
416 fmap->u.elf.handle = INVALID_HANDLE_VALUE;
417 fmap->u.elf.target_copy = NULL;
418
419 switch (emfd->kind)
420 {
421 case from_file:
422 if (!(dos_path = get_dos_file_name(emfd->u.file.filename))) return FALSE;
423 fmap->u.elf.handle = CreateFileW(dos_path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
424 heap_free(dos_path);
425 if (fmap->u.elf.handle == INVALID_HANDLE_VALUE) return FALSE;
426 break;
427 case from_handle:
428 if (!DuplicateHandle(GetCurrentProcess(), emfd->u.handle, GetCurrentProcess(), &fmap->u.elf.handle, GENERIC_READ, FALSE, 0))
429 return FALSE;
430 break;
431 case from_process:
432 break;
433 }
434
435 if (!elf_map_file_read(fmap, emfd, e_ident, sizeof(e_ident), 0))
436 return FALSE;
437
438 /* and check for an ELF header */
439 if (memcmp(e_ident, "\177ELF", 4))
440 return FALSE;
441
442 fmap->addr_size = e_ident[4] == 2 /* ELFCLASS64 */ ? 64 : 32;
443
444 if (fmap->addr_size == 32)
445 {
446 struct
447 {
448 UINT8 e_ident[16]; /* Magic number and other info */
449 UINT16 e_type; /* Object file type */
450 UINT16 e_machine; /* Architecture */
451 UINT32 e_version; /* Object file version */
452 UINT32 e_entry; /* Entry point virtual address */
453 UINT32 e_phoff; /* Program header table file offset */
454 UINT32 e_shoff; /* Section header table file offset */
455 UINT32 e_flags; /* Processor-specific flags */
456 UINT16 e_ehsize; /* ELF header size in bytes */
457 UINT16 e_phentsize; /* Program header table entry size */
458 UINT16 e_phnum; /* Program header table entry count */
459 UINT16 e_shentsize; /* Section header table entry size */
460 UINT16 e_shnum; /* Section header table entry count */
461 UINT16 e_shstrndx; /* Section header string table index */
462 } elfhdr32;
463
464 if (!elf_map_file_read(fmap, emfd, &elfhdr32, sizeof(elfhdr32), 0))
465 return FALSE;
466
467 memcpy(fmap->u.elf.elfhdr.e_ident, elfhdr32.e_ident, sizeof(e_ident));
468 fmap->u.elf.elfhdr.e_type = elfhdr32.e_type;
469 fmap->u.elf.elfhdr.e_machine = elfhdr32.e_machine;
470 fmap->u.elf.elfhdr.e_version = elfhdr32.e_version;
471 fmap->u.elf.elfhdr.e_entry = elfhdr32.e_entry;
472 fmap->u.elf.elfhdr.e_phoff = elfhdr32.e_phoff;
473 fmap->u.elf.elfhdr.e_shoff = elfhdr32.e_shoff;
474 fmap->u.elf.elfhdr.e_flags = elfhdr32.e_flags;
475 fmap->u.elf.elfhdr.e_ehsize = elfhdr32.e_ehsize;
476 fmap->u.elf.elfhdr.e_phentsize = elfhdr32.e_phentsize;
477 fmap->u.elf.elfhdr.e_phnum = elfhdr32.e_phnum;
478 fmap->u.elf.elfhdr.e_shentsize = elfhdr32.e_shentsize;
479 fmap->u.elf.elfhdr.e_shnum = elfhdr32.e_shnum;
480 fmap->u.elf.elfhdr.e_shstrndx = elfhdr32.e_shstrndx;
481 }
482 else
483 {
484 if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr, sizeof(fmap->u.elf.elfhdr), 0))
485 return FALSE;
486 }
487
488 fmap->u.elf.sect = HeapAlloc(GetProcessHeap(), 0,
489 fmap->u.elf.elfhdr.e_shnum * sizeof(fmap->u.elf.sect[0]));
490 if (!fmap->u.elf.sect) return FALSE;
491
492 for (i = 0; i < fmap->u.elf.elfhdr.e_shnum; i++)
493 {
494 if (!elf_map_shdr(emfd, fmap, i))
495 {
496 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
497 fmap->u.elf.sect = NULL;
498 return FALSE;
499 }
500 fmap->u.elf.sect[i].mapped = NULL;
501 }
502
503 /* grab size of module once loaded in memory */
504 fmap->u.elf.elf_size = 0;
505 fmap->u.elf.elf_start = ~0L;
506 for (i = 0; i < fmap->u.elf.elfhdr.e_phnum; i++)
507 {
508 if (fmap->addr_size == 32)
509 {
510 struct
511 {
512 UINT32 p_type; /* Segment type */
513 UINT32 p_offset; /* Segment file offset */
514 UINT32 p_vaddr; /* Segment virtual address */
515 UINT32 p_paddr; /* Segment physical address */
516 UINT32 p_filesz; /* Segment size in file */
517 UINT32 p_memsz; /* Segment size in memory */
518 UINT32 p_flags; /* Segment flags */
519 UINT32 p_align; /* Segment alignment */
520 } phdr;
521
522 if (elf_map_file_read(fmap, emfd, &phdr, sizeof(phdr),
523 fmap->u.elf.elfhdr.e_phoff + i * sizeof(phdr)) &&
524 phdr.p_type == ELF_PT_LOAD)
525 {
526 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
527 if (fmap->u.elf.elf_size < tmp) fmap->u.elf.elf_size = tmp;
528 if (phdr.p_vaddr < fmap->u.elf.elf_start) fmap->u.elf.elf_start = phdr.p_vaddr;
529 }
530 }
531 else
532 {
533 struct
534 {
535 UINT32 p_type; /* Segment type */
536 UINT32 p_flags; /* Segment flags */
537 UINT64 p_offset; /* Segment file offset */
538 UINT64 p_vaddr; /* Segment virtual address */
539 UINT64 p_paddr; /* Segment physical address */
540 UINT64 p_filesz; /* Segment size in file */
541 UINT64 p_memsz; /* Segment size in memory */
542 UINT64 p_align; /* Segment alignment */
543 } phdr;
544
545 if (elf_map_file_read(fmap, emfd, &phdr, sizeof(phdr),
546 fmap->u.elf.elfhdr.e_phoff + i * sizeof(phdr)) &&
547 phdr.p_type == ELF_PT_LOAD)
548 {
549 tmp = (phdr.p_vaddr + phdr.p_memsz + page_mask) & ~page_mask;
550 if (fmap->u.elf.elf_size < tmp) fmap->u.elf.elf_size = tmp;
551 if (phdr.p_vaddr < fmap->u.elf.elf_start) fmap->u.elf.elf_start = phdr.p_vaddr;
552 }
553 }
554 }
555 /* if non relocatable ELF, then remove fixed address from computation
556 * otherwise, all addresses are zero based and start has no effect
557 */
558 fmap->u.elf.elf_size -= fmap->u.elf.elf_start;
559
560 switch (emfd->kind)
561 {
562 case from_handle:
563 case from_file: break;
564 case from_process:
565 if (!(fmap->u.elf.target_copy = HeapAlloc(GetProcessHeap(), 0, fmap->u.elf.elf_size)))
566 {
567 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
568 return FALSE;
569 }
570 if (!ReadProcessMemory(emfd->u.process.handle, emfd->u.process.load_addr, fmap->u.elf.target_copy,
571 fmap->u.elf.elf_size, NULL))
572 {
573 HeapFree(GetProcessHeap(), 0, fmap->u.elf.target_copy);
574 HeapFree(GetProcessHeap(), 0, fmap->u.elf.sect);
575 return FALSE;
576 }
577 break;
578 }
579 return TRUE;
580 }
581
582 BOOL elf_map_handle(HANDLE handle, struct image_file_map* fmap)
583 {
584 struct elf_map_file_data emfd;
585 emfd.kind = from_handle;
586 emfd.u.handle = handle;
587 return elf_map_file(&emfd, fmap);
588 }
589
590 static void elf_module_remove(struct process* pcs, struct module_format* modfmt)
591 {
592 image_unmap_file(&modfmt->u.elf_info->file_map);
593 HeapFree(GetProcessHeap(), 0, modfmt);
594 }
595
596 /******************************************************************
597 * elf_is_in_thunk_area
598 *
599 * Check whether an address lies within one of the thunk area we
600 * know of.
601 */
602 int elf_is_in_thunk_area(ULONG_PTR addr,
603 const struct elf_thunk_area* thunks)
604 {
605 unsigned i;
606
607 if (thunks) for (i = 0; thunks[i].symname; i++)
608 {
609 if (addr >= thunks[i].rva_start && addr < thunks[i].rva_end)
610 return i;
611 }
612 return -1;
613 }
614
615 /******************************************************************
616 * elf_hash_symtab
617 *
618 * creating an internal hash table to ease use ELF symtab information lookup
619 */
620 static void elf_hash_symtab(struct module* module, struct pool* pool,
621 struct hash_table* ht_symtab, struct image_file_map* fmap,
622 struct elf_thunk_area* thunks)
623 {
624 int i, j, nsym;
625 const char* strp;
626 const char* symname;
627 struct symt_compiland* compiland = NULL;
628 const char* ptr;
629 struct symtab_elt* ste;
630 struct image_section_map ism, ism_str;
631 const char *symtab;
632
633 if (!elf_find_section_type(fmap, ".symtab", ELF_SHT_SYMTAB, &ism) &&
634 !elf_find_section_type(fmap, ".dynsym", ELF_SHT_DYNSYM, &ism)) return;
635 if ((symtab = image_map_section(&ism)) == IMAGE_NO_MAP) return;
636 ism_str.fmap = ism.fmap;
637 ism_str.sidx = fmap->u.elf.sect[ism.sidx].shdr.sh_link;
638 if ((strp = image_map_section(&ism_str)) == IMAGE_NO_MAP)
639 {
640 image_unmap_section(&ism);
641 return;
642 }
643
644 nsym = image_get_map_size(&ism) /
645 (fmap->addr_size == 32 ? sizeof(struct elf_sym32) : sizeof(struct elf_sym));
646
647 for (j = 0; thunks[j].symname; j++)
648 thunks[j].rva_start = thunks[j].rva_end = 0;
649
650 for (i = 0; i < nsym; i++)
651 {
652 struct elf_sym sym;
653 unsigned int type;
654
655 if (fmap->addr_size == 32)
656 {
657 struct elf_sym32 *sym32 = &((struct elf_sym32 *)symtab)[i];
658
659 sym.st_name = sym32->st_name;
660 sym.st_value = sym32->st_value;
661 sym.st_size = sym32->st_size;
662 sym.st_info = sym32->st_info;
663 sym.st_other = sym32->st_other;
664 sym.st_shndx = sym32->st_shndx;
665 }
666 else
667 sym = ((struct elf_sym *)symtab)[i];
668
669 type = sym.st_info & 0xf;
670
671 /* Ignore certain types of entries which really aren't of that much
672 * interest.
673 */
674 if ((type != ELF_STT_NOTYPE && type != ELF_STT_FILE && type != ELF_STT_OBJECT && type != ELF_STT_FUNC)
675 || !sym.st_shndx)
676 {
677 continue;
678 }
679
680 symname = strp + sym.st_name;
681
682 /* handle some specific symtab (that we'll throw away when done) */
683 switch (type)
684 {
685 case ELF_STT_FILE:
686 if (symname)
687 compiland = symt_new_compiland(module, sym.st_value,
688 source_new(module, NULL, symname));
689 else
690 compiland = NULL;
691 continue;
692 case ELF_STT_NOTYPE:
693 /* we are only interested in wine markers inserted by winebuild */
694 for (j = 0; thunks[j].symname; j++)
695 {
696 if (!strcmp(symname, thunks[j].symname))
697 {
698 thunks[j].rva_start = sym.st_value;
699 thunks[j].rva_end = sym.st_value + sym.st_size;
700 break;
701 }
702 }
703 continue;
704 }
705
706 /* FIXME: we don't need to handle them (GCC internals)
707 * Moreover, they screw up our symbol lookup :-/
708 */
709 if (symname[0] == '.' && symname[1] == 'L' && isdigit(symname[2]))
710 continue;
711
712 ste = pool_alloc(pool, sizeof(*ste));
713 ste->ht_elt.name = symname;
714 /* GCC emits, in some cases, a .<digit>+ suffix.
715 * This is used for static variable inside functions, so
716 * that we can have several such variables with same name in
717 * the same compilation unit
718 * We simply ignore that suffix when present (we also get rid
719 * of it in stabs parsing)
720 */
721 ptr = symname + strlen(symname) - 1;
722 if (isdigit(*ptr))
723 {
724 while (isdigit(*ptr) && ptr >= symname) ptr--;
725 if (ptr > symname && *ptr == '.')
726 {
727 char* n = pool_alloc(pool, ptr - symname + 1);
728 memcpy(n, symname, ptr - symname + 1);
729 n[ptr - symname] = '\0';
730 ste->ht_elt.name = n;
731 }
732 }
733 ste->sym = sym;
734 ste->compiland = compiland;
735 ste->used = 0;
736 hash_table_add(ht_symtab, &ste->ht_elt);
737 }
738 /* as we added in the ht_symtab pointers to the symbols themselves,
739 * we cannot unmap yet the sections, it will be done when we're over
740 * with this ELF file
741 */
742 }
743
744 /******************************************************************
745 * elf_lookup_symtab
746 *
747 * lookup a symbol by name in our internal hash table for the symtab
748 */
749 static const struct elf_sym *elf_lookup_symtab(const struct module* module,
750 const struct hash_table* ht_symtab,
751 const char* name, const struct symt* compiland)
752 {
753 struct symtab_elt* weak_result = NULL; /* without compiland name */
754 struct symtab_elt* result = NULL;
755 struct hash_table_iter hti;
756 struct symtab_elt* ste;
757 const char* compiland_name;
758 const char* compiland_basename;
759 const char* base;
760
761 /* we need weak match up (at least) when symbols of same name,
762 * defined several times in different compilation units,
763 * are merged in a single one (hence a different filename for c.u.)
764 */
765 if (compiland)
766 {
767 compiland_name = source_get(module,
768 ((const struct symt_compiland*)compiland)->source);
769 compiland_basename = file_nameA(compiland_name);
770 }
771 else compiland_name = compiland_basename = NULL;
772
773 hash_table_iter_init(ht_symtab, &hti, name);
774 while ((ste = hash_table_iter_up(&hti)))
775 {
776 if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
777
778 weak_result = ste;
779 if ((ste->compiland && !compiland_name) || (!ste->compiland && compiland_name))
780 continue;
781 if (ste->compiland && compiland_name)
782 {
783 const char* filename = source_get(module, ste->compiland->source);
784 if (strcmp(filename, compiland_name))
785 {
786 base = file_nameA(filename);
787 if (strcmp(base, compiland_basename)) continue;
788 }
789 }
790 if (result)
791 {
792 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
793 name, compiland_name,
794 source_get(module, result->compiland->source), (unsigned int)result->sym.st_value,
795 source_get(module, ste->compiland->source), (unsigned int)ste->sym.st_value);
796 }
797 else
798 {
799 result = ste;
800 ste->used = 1;
801 }
802 }
803 if (!result && !(result = weak_result))
804 {
805 FIXME("Couldn't find symbol %s!%s in symtab\n",
806 debugstr_w(module->module.ModuleName), name);
807 return NULL;
808 }
809 return &result->sym;
810 }
811
812 static BOOL elf_is_local_symbol(unsigned int info)
813 {
814 return !(info >> 4);
815 }
816
817 /******************************************************************
818 * elf_finish_stabs_info
819 *
820 * - get any relevant information (address & size) from the bits we got from the
821 * stabs debugging information
822 */
823 static void elf_finish_stabs_info(struct module* module, const struct hash_table* symtab)
824 {
825 struct hash_table_iter hti;
826 void* ptr;
827 struct symt_ht* sym;
828 const struct elf_sym* symp;
829 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
830
831 hash_table_iter_init(&module->ht_symbols, &hti, NULL);
832 while ((ptr = hash_table_iter_up(&hti)))
833 {
834 sym = CONTAINING_RECORD(ptr, struct symt_ht, hash_elt);
835 switch (sym->symt.tag)
836 {
837 case SymTagFunction:
838 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
839 ((struct symt_function*)sym)->size)
840 {
841 break;
842 }
843 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
844 ((struct symt_function*)sym)->container);
845 if (symp)
846 {
847 if (((struct symt_function*)sym)->address != elf_info->elf_addr &&
848 ((struct symt_function*)sym)->address != elf_info->elf_addr + symp->st_value)
849 FIXME("Changing address for %p/%s!%s from %08lx to %s\n",
850 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
851 ((struct symt_function*)sym)->address,
852 wine_dbgstr_longlong(elf_info->elf_addr + symp->st_value));
853 if (((struct symt_function*)sym)->size && ((struct symt_function*)sym)->size != symp->st_size)
854 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
855 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
856 ((struct symt_function*)sym)->size, (unsigned int)symp->st_size);
857
858 ((struct symt_function*)sym)->address = elf_info->elf_addr + symp->st_value;
859 ((struct symt_function*)sym)->size = symp->st_size;
860 } else
861 FIXME("Couldn't find %s!%s\n",
862 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
863 break;
864 case SymTagData:
865 switch (((struct symt_data*)sym)->kind)
866 {
867 case DataIsGlobal:
868 case DataIsFileStatic:
869 if (((struct symt_data*)sym)->u.var.kind != loc_absolute ||
870 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr)
871 break;
872 symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
873 ((struct symt_data*)sym)->container);
874 if (symp)
875 {
876 if (((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr &&
877 ((struct symt_data*)sym)->u.var.offset != elf_info->elf_addr + symp->st_value)
878 FIXME("Changing address for %p/%s!%s from %08lx to %s\n",
879 sym, debugstr_w(module->module.ModuleName), sym->hash_elt.name,
880 ((struct symt_function*)sym)->address,
881 wine_dbgstr_longlong(elf_info->elf_addr + symp->st_value));
882 ((struct symt_data*)sym)->u.var.offset = elf_info->elf_addr + symp->st_value;
883 ((struct symt_data*)sym)->kind = elf_is_local_symbol(symp->st_info) ?
884 DataIsFileStatic : DataIsGlobal;
885 } else
886 FIXME("Couldn't find %s!%s\n",
887 debugstr_w(module->module.ModuleName), sym->hash_elt.name);
888 break;
889 default:;
890 }
891 break;
892 default:
893 FIXME("Unsupported tag %u\n", sym->symt.tag);
894 break;
895 }
896 }
897 /* since we may have changed some addresses & sizes, mark the module to be resorted */
898 module->sortlist_valid = FALSE;
899 }
900
901 /******************************************************************
902 * elf_load_wine_thunks
903 *
904 * creating the thunk objects for a wine native DLL
905 */
906 static int elf_new_wine_thunks(struct module* module, const struct hash_table* ht_symtab,
907 const struct elf_thunk_area* thunks)
908 {
909 int j;
910 struct hash_table_iter hti;
911 struct symtab_elt* ste;
912 DWORD_PTR addr;
913 struct symt_ht* symt;
914
915 hash_table_iter_init(ht_symtab, &hti, NULL);
916 while ((ste = hash_table_iter_up(&hti)))
917 {
918 if (ste->used) continue;
919
920 addr = module->reloc_delta + ste->sym.st_value;
921
922 j = elf_is_in_thunk_area(ste->sym.st_value, thunks);
923 if (j >= 0) /* thunk found */
924 {
925 symt_new_thunk(module, ste->compiland, ste->ht_elt.name, thunks[j].ordinal,
926 addr, ste->sym.st_size);
927 }
928 else
929 {
930 ULONG64 ref_addr;
931 struct location loc;
932
933 symt = symt_find_nearest(module, addr);
934 if (symt && !symt_get_address(&symt->symt, &ref_addr))
935 ref_addr = addr;
936 if (!symt || addr != ref_addr)
937 {
938 /* creating public symbols for all the ELF symbols which haven't been
939 * used yet (ie we have no debug information on them)
940 * That's the case, for example, of the .spec.c files
941 */
942 switch (ste->sym.st_info & 0xf)
943 {
944 case ELF_STT_FUNC:
945 symt_new_function(module, ste->compiland, ste->ht_elt.name,
946 addr, ste->sym.st_size, NULL);
947 break;
948 case ELF_STT_OBJECT:
949 loc.kind = loc_absolute;
950 loc.reg = 0;
951 loc.offset = addr;
952 symt_new_global_variable(module, ste->compiland, ste->ht_elt.name,
953 elf_is_local_symbol(ste->sym.st_info),
954 loc, ste->sym.st_size, NULL);
955 break;
956 default:
957 FIXME("Shouldn't happen\n");
958 break;
959 }
960 /* FIXME: this is a hack !!!
961 * we are adding new symbols, but as we're parsing a symbol table
962 * (hopefully without duplicate symbols) we delay rebuilding the sorted
963 * module table until we're done with the symbol table
964 * Otherwise, as we intertwine symbols' add and lookup, performance
965 * is rather bad
966 */
967 module->sortlist_valid = TRUE;
968 }
969 }
970 }
971 /* see comment above */
972 module->sortlist_valid = FALSE;
973 return TRUE;
974 }
975
976 /******************************************************************
977 * elf_new_public_symbols
978 *
979 * Creates a set of public symbols from an ELF symtab
980 */
981 static int elf_new_public_symbols(struct module* module, const struct hash_table* symtab)
982 {
983 struct hash_table_iter hti;
984 struct symtab_elt* ste;
985
986 if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
987
988 /* FIXME: we're missing the ELF entry point here */
989
990 hash_table_iter_init(symtab, &hti, NULL);
991 while ((ste = hash_table_iter_up(&hti)))
992 {
993 symt_new_public(module, ste->compiland, ste->ht_elt.name,
994 FALSE,
995 module->reloc_delta + ste->sym.st_value,
996 ste->sym.st_size);
997 }
998 return TRUE;
999 }
1000
1001 /******************************************************************
1002 * elf_load_debug_info_from_map
1003 *
1004 * Loads the symbolic information from ELF module which mapping is described
1005 * in fmap
1006 * the module has been loaded at 'load_offset' address, so symbols' address
1007 * relocation is performed.
1008 * CRC is checked if fmap->with_crc is TRUE
1009 * returns
1010 * 0 if the file doesn't contain symbolic info (or this info cannot be
1011 * read or parsed)
1012 * 1 on success
1013 */
1014 static BOOL elf_load_debug_info_from_map(struct module* module,
1015 struct image_file_map* fmap,
1016 struct pool* pool,
1017 struct hash_table* ht_symtab)
1018 {
1019 BOOL ret = FALSE, lret;
1020 struct elf_thunk_area thunks[] =
1021 {
1022 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
1023 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1024 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1025 {"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
1026 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
1027 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
1028 {NULL, 0, 0, 0}
1029 };
1030
1031 module->module.SymType = SymExport;
1032
1033 /* create a hash table for the symtab */
1034 elf_hash_symtab(module, pool, ht_symtab, fmap, thunks);
1035
1036 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1037 {
1038 struct image_section_map stab_sect, stabstr_sect;
1039
1040 /* check if we need an alternate file (from debuglink or build-id) */
1041 ret = image_check_alternate(fmap, module);
1042
1043 if (image_find_section(fmap, ".stab", &stab_sect) &&
1044 image_find_section(fmap, ".stabstr", &stabstr_sect))
1045 {
1046 const char* stab;
1047 const char* stabstr;
1048
1049 stab = image_map_section(&stab_sect);
1050 stabstr = image_map_section(&stabstr_sect);
1051 if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
1052 {
1053 /* OK, now just parse all of the stabs. */
1054 lret = stabs_parse(module, module->format_info[DFI_ELF]->u.elf_info->elf_addr,
1055 stab, image_get_map_size(&stab_sect) / sizeof(struct stab_nlist), sizeof(struct stab_nlist),
1056 stabstr, image_get_map_size(&stabstr_sect),
1057 NULL, NULL);
1058 if (lret)
1059 /* and fill in the missing information for stabs */
1060 elf_finish_stabs_info(module, ht_symtab);
1061 else
1062 WARN("Couldn't correctly read stabs\n");
1063 ret = ret || lret;
1064 }
1065 image_unmap_section(&stab_sect);
1066 image_unmap_section(&stabstr_sect);
1067 }
1068 lret = dwarf2_parse(module, module->reloc_delta, thunks, fmap);
1069 ret = ret || lret;
1070 }
1071 if (wcsstr(module->module.ModuleName, S_ElfW) ||
1072 !wcscmp(module->module.ModuleName, S_WineLoaderW))
1073 {
1074 /* add the thunks for native libraries */
1075 if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
1076 elf_new_wine_thunks(module, ht_symtab, thunks);
1077 }
1078 /* add all the public symbols from symtab */
1079 if (elf_new_public_symbols(module, ht_symtab) && !ret) ret = TRUE;
1080
1081 return ret;
1082 }
1083
1084 /******************************************************************
1085 * elf_load_debug_info
1086 *
1087 * Loads ELF debugging information from the module image file.
1088 */
1089 static BOOL elf_load_debug_info(struct process* process, struct module* module)
1090 {
1091 BOOL ret = TRUE;
1092 struct pool pool;
1093 struct hash_table ht_symtab;
1094 struct module_format* modfmt;
1095
1096 if (module->type != DMT_ELF || !(modfmt = module->format_info[DFI_ELF]) || !modfmt->u.elf_info)
1097 {
1098 ERR("Bad elf module '%s'\n", debugstr_w(module->module.LoadedImageName));
1099 return FALSE;
1100 }
1101
1102 pool_init(&pool, 65536);
1103 hash_table_init(&pool, &ht_symtab, 256);
1104
1105 ret = elf_load_debug_info_from_map(module, &modfmt->u.elf_info->file_map, &pool, &ht_symtab);
1106
1107 pool_destroy(&pool);
1108 return ret;
1109 }
1110
1111 /******************************************************************
1112 * elf_fetch_file_info
1113 *
1114 * Gathers some more information for an ELF module from a given file
1115 */
1116 static BOOL elf_fetch_file_info(struct process* process, const WCHAR* name, ULONG_PTR load_addr, DWORD_PTR* base, DWORD* size, DWORD* checksum)
1117 {
1118 struct image_file_map fmap;
1119
1120 struct elf_map_file_data emfd;
1121
1122 emfd.kind = from_file;
1123 emfd.u.file.filename = name;
1124 if (!elf_map_file(&emfd, &fmap)) return FALSE;
1125 if (base) *base = fmap.u.elf.elf_start;
1126 *size = fmap.u.elf.elf_size;
1127 *checksum = calc_crc32(fmap.u.elf.handle);
1128 image_unmap_file(&fmap);
1129 return TRUE;
1130 }
1131
1132 static BOOL elf_load_file_from_fmap(struct process* pcs, const WCHAR* filename,
1133 struct image_file_map* fmap, ULONG_PTR load_offset,
1134 ULONG_PTR dyn_addr, struct elf_info* elf_info)
1135 {
1136 BOOL ret = FALSE;
1137
1138 if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
1139 {
1140 struct image_section_map ism;
1141
1142 if (elf_find_section_type(fmap, ".dynamic", ELF_SHT_DYNAMIC, &ism))
1143 {
1144 char* ptr = (char*)(ULONG_PTR)fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1145 ULONG_PTR len;
1146
1147 if (load_offset) ptr += load_offset - fmap->u.elf.elf_start;
1148
1149 if (fmap->addr_size == 32)
1150 {
1151 struct
1152 {
1153 INT32 d_tag; /* Dynamic entry type */
1154 UINT32 d_val; /* Integer or address value */
1155 } dyn;
1156
1157 do
1158 {
1159 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1160 len != sizeof(dyn))
1161 return ret;
1162 if (dyn.d_tag == ELF_DT_DEBUG)
1163 {
1164 elf_info->dbg_hdr_addr = dyn.d_val;
1165 if (load_offset == 0 && dyn_addr == 0) /* likely the case */
1166 /* Assume this module (the Wine loader) has been
1167 * loaded at its preferred address */
1168 dyn_addr = ism.fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1169 break;
1170 }
1171 ptr += sizeof(dyn);
1172 } while (dyn.d_tag);
1173 if (!dyn.d_tag) return ret;
1174 }
1175 else
1176 {
1177 struct
1178 {
1179 INT64 d_tag; /* Dynamic entry type */
1180 UINT64 d_val; /* Integer or address value */
1181 } dyn;
1182
1183 do
1184 {
1185 if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
1186 len != sizeof(dyn))
1187 return ret;
1188 if (dyn.d_tag == ELF_DT_DEBUG)
1189 {
1190 elf_info->dbg_hdr_addr = dyn.d_val;
1191 if (load_offset == 0 && dyn_addr == 0) /* likely the case */
1192 /* Assume this module (the Wine loader) has been
1193 * loaded at its preferred address */
1194 dyn_addr = ism.fmap->u.elf.sect[ism.sidx].shdr.sh_addr;
1195 break;
1196 }
1197 ptr += sizeof(dyn);
1198 } while (dyn.d_tag);
1199 if (!dyn.d_tag) return ret;
1200 }
1201 }
1202 elf_end_find(fmap);
1203 }
1204
1205 if (elf_info->flags & ELF_INFO_MODULE)
1206 {
1207 struct elf_module_info *elf_module_info;
1208 struct module_format* modfmt;
1209 struct image_section_map ism;
1210 ULONG_PTR modbase = load_offset;
1211
1212 if (elf_find_section_type(fmap, ".dynamic", ELF_SHT_DYNAMIC, &ism))
1213 {
1214 ULONG_PTR rva_dyn = elf_get_map_rva(&ism);
1215
1216 TRACE("For module %s, got ELF (start=%lx dyn=%lx), link_map (start=%lx dyn=%lx)\n",
1217 debugstr_w(filename), (ULONG_PTR)fmap->u.elf.elf_start, rva_dyn,
1218 load_offset, dyn_addr);
1219 if (dyn_addr && load_offset + rva_dyn != dyn_addr)
1220 {
1221 WARN("\thave to relocate: %lx\n", dyn_addr - rva_dyn);
1222 modbase = dyn_addr - rva_dyn;
1223 }
1224 } else WARN("For module %s, no .dynamic section\n", debugstr_w(filename));
1225 elf_end_find(fmap);
1226
1227 modfmt = HeapAlloc(GetProcessHeap(), 0,
1228 sizeof(struct module_format) + sizeof(struct elf_module_info));
1229 if (!modfmt) return FALSE;
1230 elf_info->module = module_new(pcs, filename, DMT_ELF, FALSE, modbase,
1231 fmap->u.elf.elf_size, 0, calc_crc32(fmap->u.elf.handle));
1232 if (!elf_info->module)
1233 {
1234 HeapFree(GetProcessHeap(), 0, modfmt);
1235 return FALSE;
1236 }
1237 elf_info->module->reloc_delta = elf_info->module->module.BaseOfImage - fmap->u.elf.elf_start;
1238 elf_module_info = (void*)(modfmt + 1);
1239 elf_info->module->format_info[DFI_ELF] = modfmt;
1240 modfmt->module = elf_info->module;
1241 modfmt->remove = elf_module_remove;
1242 modfmt->loc_compute = NULL;
1243 modfmt->u.elf_info = elf_module_info;
1244
1245 elf_module_info->elf_addr = load_offset;
1246
1247 elf_module_info->file_map = *fmap;
1248 elf_reset_file_map(fmap);
1249 if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
1250 {
1251 elf_info->module->module.SymType = SymDeferred;
1252 ret = TRUE;
1253 }
1254 else ret = elf_load_debug_info(pcs, elf_info->module);
1255
1256 elf_module_info->elf_mark = 1;
1257 elf_module_info->elf_loader = 0;
1258 } else ret = TRUE;
1259
1260 if (elf_info->flags & ELF_INFO_NAME)
1261 {
1262 WCHAR* ptr;
1263 ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename) + 1) * sizeof(WCHAR));
1264 if (ptr)
1265 {
1266 lstrcpyW(ptr, filename);
1267 elf_info->module_name = ptr;
1268 }
1269 else ret = FALSE;
1270 }
1271
1272 return ret;
1273 }
1274
1275 /******************************************************************
1276 * elf_load_file
1277 *
1278 * Loads the information for ELF module stored in 'filename'
1279 * the module has been loaded at 'load_offset' address
1280 * returns
1281 * -1 if the file cannot be found/opened
1282 * 0 if the file doesn't contain symbolic info (or this info cannot be
1283 * read or parsed)
1284 * 1 on success
1285 */
1286 static BOOL elf_load_file(struct process* pcs, const WCHAR* filename,
1287 ULONG_PTR load_offset, ULONG_PTR dyn_addr,
1288 struct elf_info* elf_info)
1289 {
1290 BOOL ret = FALSE;
1291 struct image_file_map fmap;
1292 struct elf_map_file_data emfd;
1293
1294 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename), load_offset);
1295
1296 emfd.kind = from_file;
1297 emfd.u.file.filename = filename;
1298 if (!elf_map_file(&emfd, &fmap)) return ret;
1299
1300 /* Next, we need to find a few of the internal ELF headers within
1301 * this thing. We need the main executable header, and the section
1302 * table.
1303 */
1304 if (!fmap.u.elf.elf_start && !load_offset)
1305 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1306 debugstr_w(filename));
1307
1308 ret = elf_load_file_from_fmap(pcs, filename, &fmap, load_offset, dyn_addr, elf_info);
1309
1310 image_unmap_file(&fmap);
1311
1312 return ret;
1313 }
1314
1315 struct elf_load_file_params
1316 {
1317 struct process *process;
1318 ULONG_PTR load_offset;
1319 ULONG_PTR dyn_addr;
1320 struct elf_info *elf_info;
1321 };
1322
1323 static BOOL elf_load_file_cb(void *param, HANDLE handle, const WCHAR *filename)
1324 {
1325 struct elf_load_file_params *load_file = param;
1326 return elf_load_file(load_file->process, filename, load_file->load_offset, load_file->dyn_addr, load_file->elf_info);
1327 }
1328
1329 /******************************************************************
1330 * elf_search_auxv
1331 *
1332 * locate some a value from the debuggee auxiliary vector
1333 */
1334 static BOOL elf_search_auxv(const struct process* pcs, unsigned type, ULONG_PTR* val)
1335 {
1336 char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
1337 SYMBOL_INFO*si = (SYMBOL_INFO*)buffer;
1338 BYTE* addr;
1339 BYTE* str;
1340 BYTE* str_max;
1341
1342 si->SizeOfStruct = sizeof(*si);
1343 si->MaxNameLen = MAX_SYM_NAME;
1344 if (!SymFromName(pcs->handle, "libwine.so.1!__wine_main_environ", si) ||
1345 !(addr = (void*)(DWORD_PTR)si->Address) ||
1346 !ReadProcessMemory(pcs->handle, addr, &addr, sizeof(addr), NULL) ||
1347 !addr)
1348 {
1349 FIXME("can't find symbol in module\n");
1350 return FALSE;
1351 }
1352 /* walk through envp[] */
1353 /* envp[] strings are located after the auxiliary vector, so protect the walk */
1354 str_max = (void*)(DWORD_PTR)~0L;
1355 while (ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) &&
1356 (addr = (void*)((DWORD_PTR)addr + sizeof(str))) != NULL && str != NULL)
1357 str_max = min(str_max, str);
1358
1359 /* Walk through the end of envp[] array.
1360 * Actually, there can be several NULLs at the end of envp[]. This happens when an env variable is
1361 * deleted, the last entry is replaced by an extra NULL.
1362 */
1363 while (addr < str_max && ReadProcessMemory(pcs->handle, addr, &str, sizeof(str), NULL) && str == NULL)
1364 addr = (void*)((DWORD_PTR)addr + sizeof(str));
1365
1366 if (pcs->is_64bit)
1367 {
1368 struct
1369 {
1370 UINT64 a_type;
1371 UINT64 a_val;
1372 } auxv;
1373
1374 while (ReadProcessMemory(pcs->handle, addr, &auxv, sizeof(auxv), NULL) && auxv.a_type)
1375 {
1376 if (auxv.a_type == type)
1377 {
1378 *val = auxv.a_val;
1379 return TRUE;
1380 }
1381 addr += sizeof(auxv);
1382 }
1383 }
1384 else
1385 {
1386 struct
1387 {
1388 UINT32 a_type;
1389 UINT32 a_val;
1390 } auxv;
1391
1392 while (ReadProcessMemory(pcs->handle, addr, &auxv, sizeof(auxv), NULL) && auxv.a_type)
1393 {
1394 if (auxv.a_type == type)
1395 {
1396 *val = auxv.a_val;
1397 return TRUE;
1398 }
1399 addr += sizeof(auxv);
1400 }
1401 }
1402
1403 return FALSE;
1404 }
1405
1406 /******************************************************************
1407 * elf_search_and_load_file
1408 *
1409 * lookup a file in standard ELF locations, and if found, load it
1410 */
1411 static BOOL elf_search_and_load_file(struct process* pcs, const WCHAR* filename,
1412 ULONG_PTR load_offset, ULONG_PTR dyn_addr,
1413 struct elf_info* elf_info)
1414 {
1415 BOOL ret = FALSE;
1416 struct module* module;
1417 static const WCHAR S_libstdcPPW[] = {'l','i','b','s','t','d','c','+','+','\0'};
1418
1419 if (filename == NULL || *filename == '\0') return FALSE;
1420 if ((module = module_is_already_loaded(pcs, filename)))
1421 {
1422 elf_info->module = module;
1423 elf_info->module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1424 return module->module.SymType;
1425 }
1426
1427 if (wcsstr(filename, S_libstdcPPW)) return FALSE; /* We know we can't do it */
1428 ret = elf_load_file(pcs, filename, load_offset, dyn_addr, elf_info);
1429 /* if relative pathname, try some absolute base dirs */
1430 if (!ret && filename == file_name(filename))
1431 {
1432 struct elf_load_file_params load_elf;
1433 load_elf.process = pcs;
1434 load_elf.load_offset = load_offset;
1435 load_elf.dyn_addr = dyn_addr;
1436 load_elf.elf_info = elf_info;
1437
1438 ret = search_unix_path(filename, process_getenv(pcs, L"LD_LIBRARY_PATH"), elf_load_file_cb, &load_elf)
1439 || search_unix_path(filename, BINDIR, elf_load_file_cb, &load_elf)
1440 || search_dll_path(pcs, filename, elf_load_file_cb, &load_elf);
1441 }
1442
1443 return ret;
1444 }
1445
1446 typedef BOOL (*enum_elf_modules_cb)(const WCHAR*, ULONG_PTR load_addr,
1447 ULONG_PTR dyn_addr, BOOL is_system, void* user);
1448
1449 /******************************************************************
1450 * elf_enum_modules_internal
1451 *
1452 * Enumerate ELF modules from a running process
1453 */
1454 static BOOL elf_enum_modules_internal(const struct process* pcs,
1455 const WCHAR* main_name,
1456 enum_elf_modules_cb cb, void* user)
1457 {
1458 WCHAR bufstrW[MAX_PATH];
1459 char bufstr[256];
1460 ULONG_PTR lm_addr;
1461
1462 if (pcs->is_64bit)
1463 {
1464 struct
1465 {
1466 UINT32 r_version;
1467 UINT64 r_map;
1468 UINT64 r_brk;
1469 UINT32 r_state;
1470 UINT64 r_ldbase;
1471 } dbg_hdr;
1472 struct
1473 {
1474 UINT64 l_addr;
1475 UINT64 l_name;
1476 UINT64 l_ld;
1477 UINT64 l_next, l_prev;
1478 } lm;
1479
1480 if (!pcs->dbg_hdr_addr || !read_process_memory(pcs, pcs->dbg_hdr_addr, &dbg_hdr, sizeof(dbg_hdr)))
1481 return FALSE;
1482
1483 /* Now walk the linked list. In all known ELF implementations,
1484 * the dynamic loader maintains this linked list for us. In some
1485 * cases the first entry doesn't appear with a name, in other cases it
1486 * does.
1487 */
1488 for (lm_addr = dbg_hdr.r_map; lm_addr; lm_addr = lm.l_next)
1489 {
1490 if (!read_process_memory(pcs, lm_addr, &lm, sizeof(lm)))
1491 return FALSE;
1492
1493 if (lm.l_prev && /* skip first entry, normally debuggee itself */
1494 lm.l_name && read_process_memory(pcs, lm.l_name, bufstr, sizeof(bufstr)))
1495 {
1496 bufstr[sizeof(bufstr) - 1] = '\0';
1497 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, ARRAY_SIZE(bufstrW));
1498 if (main_name && !bufstrW[0]) lstrcpyW(bufstrW, main_name);
1499 if (!cb(bufstrW, (ULONG_PTR)lm.l_addr, (ULONG_PTR)lm.l_ld, FALSE, user))
1500 break;
1501 }
1502 }
1503 }
1504 else
1505 {
1506 struct
1507 {
1508 UINT32 r_version;
1509 UINT32 r_map;
1510 UINT32 r_brk;
1511 UINT32 r_state;
1512 UINT32 r_ldbase;
1513 } dbg_hdr;
1514 struct
1515 {
1516 UINT32 l_addr;
1517 UINT32 l_name;
1518 UINT32 l_ld;
1519 UINT32 l_next, l_prev;
1520 } lm;
1521
1522 if (!pcs->dbg_hdr_addr || !read_process_memory(pcs, pcs->dbg_hdr_addr, &dbg_hdr, sizeof(dbg_hdr)))
1523 return FALSE;
1524
1525 /* Now walk the linked list. In all known ELF implementations,
1526 * the dynamic loader maintains this linked list for us. In some
1527 * cases the first entry doesn't appear with a name, in other cases it
1528 * does.
1529 */
1530 for (lm_addr = dbg_hdr.r_map; lm_addr; lm_addr = lm.l_next)
1531 {
1532 if (!read_process_memory(pcs, lm_addr, &lm, sizeof(lm)))
1533 return FALSE;
1534
1535 if (lm.l_prev && /* skip first entry, normally debuggee itself */
1536 lm.l_name && read_process_memory(pcs, lm.l_name, bufstr, sizeof(bufstr)))
1537 {
1538 bufstr[sizeof(bufstr) - 1] = '\0';
1539 MultiByteToWideChar(CP_UNIXCP, 0, bufstr, -1, bufstrW, ARRAY_SIZE(bufstrW));
1540 if (main_name && !bufstrW[0]) lstrcpyW(bufstrW, main_name);
1541 if (!cb(bufstrW, (ULONG_PTR)lm.l_addr, (ULONG_PTR)lm.l_ld, FALSE, user))
1542 break;
1543 }
1544 }
1545 }
1546
1547 if (!lm_addr)
1548 {
1549 ULONG_PTR ehdr_addr;
1550
1551 if (elf_search_auxv(pcs, ELF_AT_SYSINFO_EHDR, &ehdr_addr))
1552 {
1553 static const WCHAR vdsoW[] = {'[','v','d','s','o',']','.','s','o',0};
1554 cb(vdsoW, ehdr_addr, 0, TRUE, user);
1555 }
1556 }
1557 return TRUE;
1558 }
1559
1560 struct elf_enum_user
1561 {
1562 enum_modules_cb cb;
1563 void* user;
1564 };
1565
1566 static BOOL elf_enum_modules_translate(const WCHAR* name, ULONG_PTR load_addr,
1567 ULONG_PTR dyn_addr, BOOL is_system, void* user)
1568 {
1569 struct elf_enum_user* eeu = user;
1570 return eeu->cb(name, load_addr, eeu->user);
1571 }
1572
1573 /******************************************************************
1574 * elf_enum_modules
1575 *
1576 * Enumerates the ELF loaded modules from a running target (hProc)
1577 * This function doesn't require that someone has called SymInitialize
1578 * on this very process.
1579 */
1580 static BOOL elf_enum_modules(struct process* process, enum_modules_cb cb, void* user)
1581 {
1582 struct elf_info elf_info;
1583 BOOL ret;
1584 struct elf_enum_user eeu;
1585
1586 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_NAME;
1587 elf_info.module_name = NULL;
1588 eeu.cb = cb;
1589 eeu.user = user;
1590 ret = elf_enum_modules_internal(process, elf_info.module_name, elf_enum_modules_translate, &eeu);
1591 HeapFree(GetProcessHeap(), 0, (char*)elf_info.module_name);
1592 return ret;
1593 }
1594
1595 struct elf_load
1596 {
1597 struct process* pcs;
1598 struct elf_info elf_info;
1599 const WCHAR* name;
1600 BOOL ret;
1601 };
1602
1603 /******************************************************************
1604 * elf_load_cb
1605 *
1606 * Callback for elf_load_module, used to walk the list of loaded
1607 * modules.
1608 */
1609 static BOOL elf_load_cb(const WCHAR* name, ULONG_PTR load_addr,
1610 ULONG_PTR dyn_addr, BOOL is_system, void* user)
1611 {
1612 struct elf_load* el = user;
1613 BOOL ret = TRUE;
1614 const WCHAR* p;
1615
1616 if (is_system) /* virtual ELF module, created by system. handle it from memory */
1617 {
1618 struct module* module;
1619 struct elf_map_file_data emfd;
1620 struct image_file_map fmap;
1621
1622 if ((module = module_is_already_loaded(el->pcs, name)))
1623 {
1624 el->elf_info.module = module;
1625 el->elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_mark = 1;
1626 return module->module.SymType;
1627 }
1628
1629 emfd.kind = from_process;
1630 emfd.u.process.handle = el->pcs->handle;
1631 emfd.u.process.load_addr = (void*)load_addr;
1632
1633 if (elf_map_file(&emfd, &fmap))
1634 el->ret = elf_load_file_from_fmap(el->pcs, name, &fmap, load_addr, 0, &el->elf_info);
1635 return TRUE;
1636 }
1637 if (el->name)
1638 {
1639 /* memcmp is needed for matches when bufstr contains also version information
1640 * el->name: libc.so, name: libc.so.6.0
1641 */
1642 p = file_name(name);
1643 }
1644
1645 if (!el->name || !memcmp(p, el->name, lstrlenW(el->name) * sizeof(WCHAR)))
1646 {
1647 el->ret = elf_search_and_load_file(el->pcs, name, load_addr, dyn_addr, &el->elf_info);
1648 if (el->name) ret = FALSE;
1649 }
1650
1651 return ret;
1652 }
1653
1654 /******************************************************************
1655 * elf_load_module
1656 *
1657 * loads an ELF module and stores it in process' module list
1658 * Also, find module real name and load address from
1659 * the real loaded modules list in pcs address space
1660 */
1661 static struct module* elf_load_module(struct process* pcs, const WCHAR* name, ULONG_PTR addr)
1662 {
1663 struct elf_load el;
1664
1665 TRACE("(%p %s %08lx)\n", pcs, debugstr_w(name), addr);
1666
1667 el.elf_info.flags = ELF_INFO_MODULE;
1668 el.ret = FALSE;
1669
1670 if (pcs->dbg_hdr_addr) /* we're debugging a life target */
1671 {
1672 el.pcs = pcs;
1673 /* do only the lookup from the filename, not the path (as we lookup module
1674 * name in the process' loaded module list)
1675 */
1676 el.name = file_name(name);
1677 el.ret = FALSE;
1678
1679 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1680 return NULL;
1681 }
1682 else if (addr)
1683 {
1684 el.name = name;
1685 el.ret = elf_search_and_load_file(pcs, el.name, addr, 0, &el.elf_info);
1686 }
1687 if (!el.ret) return NULL;
1688 assert(el.elf_info.module);
1689 return el.elf_info.module;
1690 }
1691
1692 /******************************************************************
1693 * elf_synchronize_module_list
1694 *
1695 * this function rescans the debuggee module's list and synchronizes it with
1696 * the one from 'pcs', i.e.:
1697 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1698 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1699 */
1700 static BOOL elf_synchronize_module_list(struct process* pcs)
1701 {
1702 struct module* module;
1703 struct elf_load el;
1704
1705 for (module = pcs->lmodules; module; module = module->next)
1706 {
1707 if (module->type == DMT_ELF && !module->is_virtual)
1708 module->format_info[DFI_ELF]->u.elf_info->elf_mark = 0;
1709 }
1710
1711 el.pcs = pcs;
1712 el.elf_info.flags = ELF_INFO_MODULE;
1713 el.ret = FALSE;
1714 el.name = NULL; /* fetch all modules */
1715
1716 if (!elf_enum_modules_internal(pcs, NULL, elf_load_cb, &el))
1717 return FALSE;
1718
1719 module = pcs->lmodules;
1720 while (module)
1721 {
1722 if (module->type == DMT_ELF && !module->is_virtual)
1723 {
1724 struct elf_module_info* elf_info = module->format_info[DFI_ELF]->u.elf_info;
1725
1726 if (!elf_info->elf_mark && !elf_info->elf_loader)
1727 {
1728 module_remove(pcs, module);
1729 /* restart all over */
1730 module = pcs->lmodules;
1731 continue;
1732 }
1733 }
1734 module = module->next;
1735 }
1736 return TRUE;
1737 }
1738
1739 static const struct loader_ops elf_loader_ops =
1740 {
1741 elf_synchronize_module_list,
1742 elf_load_module,
1743 elf_load_debug_info,
1744 elf_enum_modules,
1745 elf_fetch_file_info,
1746 };
1747
1748 /******************************************************************
1749 * elf_read_wine_loader_dbg_info
1750 *
1751 * Try to find a decent wine executable which could have loaded the debuggee
1752 */
1753 BOOL elf_read_wine_loader_dbg_info(struct process* pcs, ULONG_PTR addr)
1754 {
1755 struct elf_info elf_info;
1756 WCHAR *loader;
1757 BOOL ret;
1758
1759 elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
1760 loader = get_wine_loader_name(pcs);
1761 ret = elf_search_and_load_file(pcs, loader, addr, 0, &elf_info);
1762 heap_free(loader);
1763 if (!ret || !elf_info.dbg_hdr_addr) return FALSE;
1764
1765 TRACE("Found ELF debug header %#lx\n", elf_info.dbg_hdr_addr);
1766 elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_loader = 1;
1767 module_set_module(elf_info.module, S_WineLoaderW);
1768 pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr;
1769 pcs->loader = &elf_loader_ops;
1770 return TRUE;
1771 }
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