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push 480b0ab11d721a21c8618d4f9374bf7a3008a5c8
[wine/hacks.git] / dlls / dbghelp / dwarf.c
blob855f8c010bbb963b624598e45bc5b229d2d53781
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006, 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 #define NONAMELESSUNION
23
24 #include "config.h"
25
26 #include <sys/types.h>
27 #include <fcntl.h>
28 #ifdef HAVE_SYS_STAT_H
29 # include <sys/stat.h>
30 #endif
31 #ifdef HAVE_SYS_MMAN_H
32 #include <sys/mman.h>
33 #endif
34 #include <limits.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #ifdef HAVE_UNISTD_H
38 # include <unistd.h>
39 #endif
40 #include <stdio.h>
41 #ifndef PATH_MAX
42 #define PATH_MAX MAX_PATH
43 #endif
44 #include <assert.h>
45 #include <stdarg.h>
46
47 #include "windef.h"
48 #include "winbase.h"
49 #include "winuser.h"
50 #include "ole2.h"
51 #include "oleauto.h"
52
53 #include "dbghelp_private.h"
54
55 #include "wine/debug.h"
56
57 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
58
59 /* FIXME:
60 * - Functions:
61 * o unspecified parameters
62 * o inlined functions
63 * o Debug{Start|End}Point
64 * o CFA
65 * - Udt
66 * o proper types loading (nesting)
67 */
68
69 #if 0
70 static void dump(const void* ptr, unsigned len)
71 {
72 int i, j;
73 BYTE msg[128];
74 static const char hexof[] = "0123456789abcdef";
75 const BYTE* x = ptr;
76
77 for (i = 0; i < len; i += 16)
78 {
79 sprintf(msg, "%08x: ", i);
80 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
81 for (j = 0; j < min(16, len - i); j++)
82 {
83 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
84 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
85 msg[10 + 3 * j + 2] = ' ';
86 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
87 x[i + j] : '.';
88 }
89 msg[10 + 3 * 16] = ' ';
90 msg[10 + 3 * 16 + 1 + 16] = '\0';
91 TRACE("%s\n", msg);
92 }
93 }
94 #endif
95
96 /**
97 *
98 * Main Specs:
99 * http://www.eagercon.com/dwarf/dwarf3std.htm
100 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
101 *
102 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
103 *
104 * example of projects who do dwarf2 parsing:
105 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
106 * http://elis.ugent.be/diota/log/ltrace_elf.c
107 */
108 #include "dwarf.h"
109
110 /**
111 * Parsers
112 */
113
114 typedef struct dwarf2_abbrev_entry_attr_s
115 {
116 unsigned long attribute;
117 unsigned long form;
118 struct dwarf2_abbrev_entry_attr_s* next;
119 } dwarf2_abbrev_entry_attr_t;
120
121 typedef struct dwarf2_abbrev_entry_s
122 {
123 unsigned long entry_code;
124 unsigned long tag;
125 unsigned char have_child;
126 unsigned num_attr;
127 dwarf2_abbrev_entry_attr_t* attrs;
128 } dwarf2_abbrev_entry_t;
129
130 struct dwarf2_block
131 {
132 unsigned size;
133 const unsigned char* ptr;
134 };
135
136 struct attribute
137 {
138 unsigned long form;
139 union
140 {
141 unsigned long uvalue;
142 long svalue;
143 const char* string;
144 struct dwarf2_block block;
145 } u;
146 };
147
148 typedef struct dwarf2_debug_info_s
149 {
150 const dwarf2_abbrev_entry_t*abbrev;
151 struct symt* symt;
152 const unsigned char** data;
153 struct vector children;
154 } dwarf2_debug_info_t;
155
156 typedef struct dwarf2_section_s
157 {
158 const unsigned char* address;
159 unsigned size;
160 } dwarf2_section_t;
161
162 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_max};
163
164 typedef struct dwarf2_traverse_context_s
165 {
166 const unsigned char* data;
167 const unsigned char* start_data;
168 const unsigned char* end_data;
169 unsigned char word_size;
170 } dwarf2_traverse_context_t;
171
172 /* symt_cache indexes */
173 #define sc_void 0
174 #define sc_int1 1
175 #define sc_int2 2
176 #define sc_int4 3
177 #define sc_num 4
178
179 typedef struct dwarf2_parse_context_s
180 {
181 const dwarf2_section_t* sections;
182 unsigned section;
183 struct pool pool;
184 struct module* module;
185 const struct elf_thunk_area*thunks;
186 struct sparse_array abbrev_table;
187 struct sparse_array debug_info_table;
188 unsigned long load_offset;
189 unsigned long ref_offset;
190 unsigned char word_size;
191 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
192 } dwarf2_parse_context_t;
193
194 /* stored in the dbghelp's module internal structure for later reuse */
195 struct dwarf2_module_info_s
196 {
197 dwarf2_section_t debug_loc;
198 };
199
200 #define loc_dwarf2_location_list (loc_user + 0)
201 #define loc_dwarf2_block (loc_user + 1)
202
203 /* forward declarations */
204 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
205
206 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
207 {
208 return *ptr;
209 }
210
211 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
212 {
213 unsigned char uvalue = dwarf2_get_byte(ctx->data);
214 ctx->data += 1;
215 return uvalue;
216 }
217
218 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
219 {
220 return *(const UINT16*)ptr;
221 }
222
223 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
224 {
225 unsigned short uvalue = dwarf2_get_u2(ctx->data);
226 ctx->data += 2;
227 return uvalue;
228 }
229
230 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
231 {
232 return *(const UINT32*)ptr;
233 }
234
235 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
236 {
237 unsigned long uvalue = dwarf2_get_u4(ctx->data);
238 ctx->data += 4;
239 return uvalue;
240 }
241
242 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
243 {
244 return *(const UINT64*)ptr;
245 }
246
247 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
248 {
249 unsigned long ret = 0;
250 unsigned char byte;
251 unsigned shift = 0;
252
253 do
254 {
255 byte = dwarf2_get_byte(ptr++);
256 ret |= (byte & 0x7f) << shift;
257 shift += 7;
258 } while (byte & 0x80);
259
260 if (end) *end = ptr;
261 return ret;
262 }
263
264 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
265 {
266 unsigned long ret;
267
268 assert(ctx);
269
270 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
271
272 return ret;
273 }
274
275 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
276 {
277 long ret = 0;
278 unsigned char byte;
279 unsigned shift = 0;
280 const unsigned size = sizeof(int) * 8;
281
282 do
283 {
284 byte = dwarf2_get_byte(ptr++);
285 ret |= (byte & 0x7f) << shift;
286 shift += 7;
287 } while (byte & 0x80);
288 if (end) *end = ptr;
289
290 /* as spec: sign bit of byte is 2nd high order bit (80x40)
291 * -> 0x80 is used as flag.
292 */
293 if ((shift < size) && (byte & 0x40))
294 {
295 ret |= - (1 << shift);
296 }
297 return ret;
298 }
299
300 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
301 {
302 long ret = 0;
303
304 assert(ctx);
305
306 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
307 return ret;
308 }
309
310 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
311 {
312 unsigned ret;
313 for (ret = 0; ctx->data[ret] & 0x80; ret++);
314 return ret + 1;
315 }
316
317 /******************************************************************
318 * dwarf2_get_addr
319 *
320 * Returns an address.
321 * We assume that in all cases word size from Dwarf matches the size of
322 * addresses in platform where the exec is compiled.
323 */
324 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
325 {
326 unsigned long ret;
327
328 switch (word_size)
329 {
330 case 4:
331 ret = dwarf2_get_u4(ptr);
332 break;
333 case 8:
334 ret = dwarf2_get_u8(ptr);
335 break;
336 default:
337 FIXME("Unsupported Word Size %u\n", word_size);
338 ret = 0;
339 }
340 return ret;
341 }
342
343 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
344 {
345 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
346 ctx->data += ctx->word_size;
347 return ret;
348 }
349
350 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
351 {
352 return wine_dbg_sprintf("ctx(%p)", ctx->data);
353 }
354
355 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
356 {
357 return wine_dbg_sprintf("ctx(%p,%s)",
358 ctx, debugstr_w(ctx->module->module.ModuleName));
359 }
360
361 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
362 {
363 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
364 di->abbrev, di->symt);
365 }
366
367 static dwarf2_abbrev_entry_t*
368 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
369 unsigned long entry_code)
370 {
371 assert( NULL != abbrev_table );
372 return sparse_array_find(abbrev_table, entry_code);
373 }
374
375 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
376 struct sparse_array* abbrev_table,
377 struct pool* pool)
378 {
379 unsigned long entry_code;
380 dwarf2_abbrev_entry_t* abbrev_entry;
381 dwarf2_abbrev_entry_attr_t* new = NULL;
382 dwarf2_abbrev_entry_attr_t* last = NULL;
383 unsigned long attribute;
384 unsigned long form;
385
386 assert( NULL != abbrev_ctx );
387
388 TRACE("%s, end at %p\n",
389 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
390
391 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
392 while (abbrev_ctx->data < abbrev_ctx->end_data)
393 {
394 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
395 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
396 TRACE("found entry_code %lu\n", entry_code);
397 if (!entry_code)
398 {
399 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
400 break;
401 }
402 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
403 assert( NULL != abbrev_entry );
404
405 abbrev_entry->entry_code = entry_code;
406 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
407 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
408 abbrev_entry->attrs = NULL;
409 abbrev_entry->num_attr = 0;
410
411 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
412 abbrev_table, sparse_array_length(abbrev_table),
413 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
414
415 last = NULL;
416 while (1)
417 {
418 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
419 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
420 if (!attribute) break;
421
422 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
423 assert(new);
424
425 new->attribute = attribute;
426 new->form = form;
427 new->next = NULL;
428 if (abbrev_entry->attrs) last->next = new;
429 else abbrev_entry->attrs = new;
430 last = new;
431 abbrev_entry->num_attr++;
432 }
433 }
434 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
435 }
436
437 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
438 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
439 {
440 unsigned step;
441
442 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
443
444 switch (abbrev_attr->form)
445 {
446 case DW_FORM_ref_addr:
447 case DW_FORM_addr: step = ctx->word_size; break;
448 case DW_FORM_flag:
449 case DW_FORM_data1:
450 case DW_FORM_ref1: step = 1; break;
451 case DW_FORM_data2:
452 case DW_FORM_ref2: step = 2; break;
453 case DW_FORM_data4:
454 case DW_FORM_ref4:
455 case DW_FORM_strp: step = 4; break;
456 case DW_FORM_data8:
457 case DW_FORM_ref8: step = 8; break;
458 case DW_FORM_sdata:
459 case DW_FORM_ref_udata:
460 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
461 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
462 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
463 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
464 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
465 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
466 default:
467 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
468 return;
469 }
470 ctx->data += step;
471 }
472
473 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
474 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
475 const unsigned char* data,
476 struct attribute* attr)
477 {
478 attr->form = abbrev_attr->form;
479 switch (attr->form)
480 {
481 case DW_FORM_ref_addr:
482 case DW_FORM_addr:
483 attr->u.uvalue = dwarf2_get_addr(data, ctx->word_size);
484 TRACE("addr<0x%lx>\n", attr->u.uvalue);
485 break;
486
487 case DW_FORM_flag:
488 attr->u.uvalue = dwarf2_get_byte(data);
489 TRACE("flag<0x%lx>\n", attr->u.uvalue);
490 break;
491
492 case DW_FORM_data1:
493 attr->u.uvalue = dwarf2_get_byte(data);
494 TRACE("data1<%lu>\n", attr->u.uvalue);
495 break;
496
497 case DW_FORM_data2:
498 attr->u.uvalue = dwarf2_get_u2(data);
499 TRACE("data2<%lu>\n", attr->u.uvalue);
500 break;
501
502 case DW_FORM_data4:
503 attr->u.uvalue = dwarf2_get_u4(data);
504 TRACE("data4<%lu>\n", attr->u.uvalue);
505 break;
506
507 case DW_FORM_data8:
508 attr->u.block.size = 8;
509 attr->u.block.ptr = data;
510 data += 8;
511 break;
512
513 case DW_FORM_ref1:
514 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
515 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
516 break;
517
518 case DW_FORM_ref2:
519 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
520 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
521 break;
522
523 case DW_FORM_ref4:
524 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
525 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
526 break;
527
528 case DW_FORM_ref8:
529 FIXME("Unhandled 64 bit support\n");
530 break;
531
532 case DW_FORM_sdata:
533 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
534 break;
535
536 case DW_FORM_ref_udata:
537 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
538 break;
539
540 case DW_FORM_udata:
541 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
542 break;
543
544 case DW_FORM_string:
545 attr->u.string = (const char *)data;
546 TRACE("string<%s>\n", attr->u.string);
547 break;
548
549 case DW_FORM_strp:
550 {
551 unsigned long offset = dwarf2_get_u4(data);
552 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
553 }
554 TRACE("strp<%s>\n", attr->u.string);
555 break;
556
557 case DW_FORM_block:
558 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
559 break;
560
561 case DW_FORM_block1:
562 attr->u.block.size = dwarf2_get_byte(data);
563 attr->u.block.ptr = data + 1;
564 break;
565
566 case DW_FORM_block2:
567 attr->u.block.size = dwarf2_get_u2(data);
568 attr->u.block.ptr = data + 2;
569 break;
570
571 case DW_FORM_block4:
572 attr->u.block.size = dwarf2_get_u4(data);
573 attr->u.block.ptr = data + 4;
574 break;
575
576 default:
577 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
578 break;
579 }
580 }
581
582 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
583 const dwarf2_debug_info_t* di,
584 unsigned at, struct attribute* attr)
585 {
586 unsigned i, ai = 0;
587 dwarf2_abbrev_entry_attr_t* abbrev_attr;
588 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
589
590 while (di)
591 {
592 abstract_abbrev_attr = NULL;
593 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
594 {
595 if (abbrev_attr->attribute == at)
596 {
597 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
598 return TRUE;
599 }
600 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
601 at != DW_AT_sibling)
602 {
603 abstract_abbrev_attr = abbrev_attr;
604 ai = i;
605 }
606 }
607 /* do we have an abstract origin debug entry to look into ? */
608 if (!abstract_abbrev_attr) break;
609 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
610 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
611 FIXME("Should have found the debug info entry\n");
612 }
613 return FALSE;
614 }
615
616 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
617 struct symt_compiland*);
618
619 #define Wine_DW_no_register 0x7FFFFFFF
620
621 static unsigned dwarf2_map_register(int regno)
622 {
623 unsigned reg;
624
625 switch (regno)
626 {
627 case Wine_DW_no_register: FIXME("What the heck map reg 0x%x\n",regno); reg = 0; break;
628 case 0: reg = CV_REG_EAX; break;
629 case 1: reg = CV_REG_ECX; break;
630 case 2: reg = CV_REG_EDX; break;
631 case 3: reg = CV_REG_EBX; break;
632 case 4: reg = CV_REG_ESP; break;
633 case 5: reg = CV_REG_EBP; break;
634 case 6: reg = CV_REG_ESI; break;
635 case 7: reg = CV_REG_EDI; break;
636 case 8: reg = CV_REG_EIP; break;
637 case 9: reg = CV_REG_EFLAGS; break;
638 case 10: reg = CV_REG_CS; break;
639 case 11: reg = CV_REG_SS; break;
640 case 12: reg = CV_REG_DS; break;
641 case 13: reg = CV_REG_ES; break;
642 case 14: reg = CV_REG_FS; break;
643 case 15: reg = CV_REG_GS; break;
644 case 16: case 17: case 18: case 19:
645 case 20: case 21: case 22: case 23:
646 reg = CV_REG_ST0 + regno - 16; break;
647 case 24: reg = CV_REG_CTRL; break;
648 case 25: reg = CV_REG_STAT; break;
649 case 26: reg = CV_REG_TAG; break;
650 /*
651 reg: fiseg 27
652 reg: fioff 28
653 reg: foseg 29
654 reg: fooff 30
655 reg: fop 31
656 */
657 case 32: case 33: case 34: case 35:
658 case 36: case 37: case 38: case 39:
659 reg = CV_REG_XMM0 + regno - 32; break;
660 case 40: reg = CV_REG_MXCSR; break;
661 default:
662 FIXME("Don't know how to map register %d\n", regno);
663 return 0;
664 }
665 return reg;
666 }
667
668 static enum location_error
669 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
670 HANDLE hproc, const struct location* frame)
671 {
672 DWORD_PTR stack[64];
673 unsigned stk;
674 unsigned char op;
675 BOOL piece_found = FALSE;
676
677 stack[stk = 0] = 0;
678
679 loc->kind = loc_absolute;
680 loc->reg = Wine_DW_no_register;
681
682 while (ctx->data < ctx->end_data)
683 {
684 op = dwarf2_parse_byte(ctx);
685 switch (op)
686 {
687 case DW_OP_lit0: case DW_OP_lit1: case DW_OP_lit2: case DW_OP_lit3:
688 case DW_OP_lit4: case DW_OP_lit5: case DW_OP_lit6: case DW_OP_lit7:
689 case DW_OP_lit8: case DW_OP_lit9: case DW_OP_lit10: case DW_OP_lit11:
690 case DW_OP_lit12: case DW_OP_lit13: case DW_OP_lit14: case DW_OP_lit15:
691 case DW_OP_lit16: case DW_OP_lit17: case DW_OP_lit18: case DW_OP_lit19:
692 case DW_OP_lit20: case DW_OP_lit21: case DW_OP_lit22: case DW_OP_lit23:
693 case DW_OP_lit24: case DW_OP_lit25: case DW_OP_lit26: case DW_OP_lit27:
694 case DW_OP_lit28: case DW_OP_lit29: case DW_OP_lit30: case DW_OP_lit31:
695 stack[++stk] = op - DW_OP_lit0; break;
696 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
697 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
698 case DW_OP_const1s: stack[++stk] = (long)(signed char)dwarf2_parse_byte(ctx); break;
699 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
700 case DW_OP_const2s: stack[++stk] = (long)(short)dwarf2_parse_u2(ctx); break;
701 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
702 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
703 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
704 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
705 case DW_OP_plus_uconst:
706 stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
707 case DW_OP_reg0: case DW_OP_reg1: case DW_OP_reg2: case DW_OP_reg3:
708 case DW_OP_reg4: case DW_OP_reg5: case DW_OP_reg6: case DW_OP_reg7:
709 case DW_OP_reg8: case DW_OP_reg9: case DW_OP_reg10: case DW_OP_reg11:
710 case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14: case DW_OP_reg15:
711 case DW_OP_reg16: case DW_OP_reg17: case DW_OP_reg18: case DW_OP_reg19:
712 case DW_OP_reg20: case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23:
713 case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26: case DW_OP_reg27:
714 case DW_OP_reg28: case DW_OP_reg29: case DW_OP_reg30: case DW_OP_reg31:
715 /* dbghelp APIs don't know how to cope with this anyway
716 * (for example 'long long' stored in two registers)
717 * FIXME: We should tell winedbg how to deal with it (sigh)
718 */
719 if (!piece_found)
720 {
721 if (loc->reg != Wine_DW_no_register)
722 FIXME("Only supporting one reg (%d -> %d)\n",
723 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
724 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
725 }
726 loc->kind = loc_register;
727 break;
728 case DW_OP_breg0: case DW_OP_breg1: case DW_OP_breg2: case DW_OP_breg3:
729 case DW_OP_breg4: case DW_OP_breg5: case DW_OP_breg6: case DW_OP_breg7:
730 case DW_OP_breg8: case DW_OP_breg9: case DW_OP_breg10: case DW_OP_breg11:
731 case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14: case DW_OP_breg15:
732 case DW_OP_breg16: case DW_OP_breg17: case DW_OP_breg18: case DW_OP_breg19:
733 case DW_OP_breg20: case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23:
734 case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26: case DW_OP_breg27:
735 case DW_OP_breg28: case DW_OP_breg29: case DW_OP_breg30: case DW_OP_breg31:
736 /* dbghelp APIs don't know how to cope with this anyway
737 * (for example 'long long' stored in two registers)
738 * FIXME: We should tell winedbg how to deal with it (sigh)
739 */
740 if (!piece_found)
741 {
742 if (loc->reg != Wine_DW_no_register)
743 FIXME("Only supporting one reg (%d -> %d)\n",
744 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
745 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
746 }
747 stack[++stk] = dwarf2_leb128_as_signed(ctx);
748 loc->kind = loc_regrel;
749 break;
750 case DW_OP_fbreg:
751 if (loc->reg != Wine_DW_no_register)
752 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
753 if (frame && frame->kind == loc_register)
754 {
755 loc->kind = loc_regrel;
756 loc->reg = frame->reg;
757 stack[++stk] = dwarf2_leb128_as_signed(ctx);
758 }
759 else if (frame && frame->kind == loc_regrel)
760 {
761 loc->kind = loc_regrel;
762 loc->reg = frame->reg;
763 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
764 }
765 else
766 {
767 /* FIXME: this could be later optimized by not recomputing
768 * this very location expression
769 */
770 loc->kind = loc_dwarf2_block;
771 stack[++stk] = dwarf2_leb128_as_signed(ctx);
772 }
773 break;
774 case DW_OP_piece:
775 {
776 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
777 WARN("Not handling OP_piece (size=%d)\n", sz);
778 piece_found = TRUE;
779 }
780 break;
781 case DW_OP_deref:
782 if (!stk)
783 {
784 FIXME("Unexpected empty stack\n");
785 return loc_err_internal;
786 }
787 if (loc->reg != Wine_DW_no_register)
788 {
789 WARN("Too complex expression for deref\n");
790 return loc_err_too_complex;
791 }
792 if (hproc)
793 {
794 DWORD_PTR addr = stack[stk--];
795 DWORD_PTR deref;
796
797 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
798 {
799 WARN("Couldn't read memory at %lx\n", addr);
800 return loc_err_cant_read;
801 }
802 stack[++stk] = deref;
803 }
804 else
805 {
806 loc->kind = loc_dwarf2_block;
807 }
808 break;
809 default:
810 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
811 FIXME("Unhandled attr op: %x\n", op);
812 /* FIXME else unhandled extension */
813 return loc_err_internal;
814 }
815 }
816 loc->offset = stack[stk];
817 return 0;
818 }
819
820 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
821 const dwarf2_debug_info_t* di,
822 unsigned long dw,
823 struct location* loc,
824 const struct location* frame)
825 {
826 struct attribute xloc;
827
828 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
829
830 switch (xloc.form)
831 {
832 case DW_FORM_data1: case DW_FORM_data2:
833 case DW_FORM_udata: case DW_FORM_sdata:
834 loc->kind = loc_absolute;
835 loc->reg = 0;
836 loc->offset = xloc.u.uvalue;
837 return TRUE;
838 case DW_FORM_data4: case DW_FORM_data8:
839 loc->kind = loc_dwarf2_location_list;
840 loc->reg = Wine_DW_no_register;
841 loc->offset = xloc.u.uvalue;
842 return TRUE;
843 }
844
845 /* assume we have a block form */
846
847 if (xloc.u.block.size)
848 {
849 dwarf2_traverse_context_t lctx;
850 enum location_error err;
851
852 lctx.data = xloc.u.block.ptr;
853 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
854 lctx.word_size = ctx->word_size;
855
856 err = compute_location(&lctx, loc, NULL, frame);
857 if (err < 0)
858 {
859 loc->kind = loc_error;
860 loc->reg = err;
861 }
862 else if (loc->kind == loc_dwarf2_block)
863 {
864 unsigned* ptr = pool_alloc(&ctx->module->pool,
865 sizeof(unsigned) + xloc.u.block.size);
866 *ptr = xloc.u.block.size;
867 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
868 loc->offset = (unsigned long)ptr;
869 }
870 }
871 return TRUE;
872 }
873
874 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
875 const dwarf2_debug_info_t* di)
876 {
877 struct attribute attr;
878
879 if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
880 {
881 dwarf2_debug_info_t* type;
882
883 type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
884 if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
885 if (!type->symt)
886 {
887 /* load the debug info entity */
888 dwarf2_load_one_entry(ctx, type, NULL);
889 }
890 return type->symt;
891 }
892 return NULL;
893 }
894
895 /******************************************************************
896 * dwarf2_read_one_debug_info
897 *
898 * Loads into memory one debug info entry, and recursively its children (if any)
899 */
900 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
901 dwarf2_traverse_context_t* traverse,
902 dwarf2_debug_info_t** pdi)
903 {
904 const dwarf2_abbrev_entry_t*abbrev;
905 unsigned long entry_code;
906 unsigned long offset;
907 dwarf2_debug_info_t* di;
908 dwarf2_debug_info_t* child;
909 dwarf2_debug_info_t** where;
910 dwarf2_abbrev_entry_attr_t* attr;
911 unsigned i;
912 struct attribute sibling;
913
914 offset = traverse->data - ctx->sections[ctx->section].address;
915 entry_code = dwarf2_leb128_as_unsigned(traverse);
916 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
917 if (!entry_code)
918 {
919 *pdi = NULL;
920 return TRUE;
921 }
922 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
923 if (!abbrev)
924 {
925 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
926 return FALSE;
927 }
928 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
929 if (!di) return FALSE;
930 di->abbrev = abbrev;
931 di->symt = NULL;
932
933 if (abbrev->num_attr)
934 {
935 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
936 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
937 {
938 di->data[i] = traverse->data;
939 dwarf2_swallow_attribute(traverse, attr);
940 }
941 }
942 else di->data = NULL;
943 if (abbrev->have_child)
944 {
945 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
946 while (traverse->data < traverse->end_data)
947 {
948 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
949 if (!child) break;
950 where = vector_add(&di->children, &ctx->pool);
951 if (!where) return FALSE;
952 *where = child;
953 }
954 }
955 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
956 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
957 {
958 WARN("setting cursor for %s to next sibling <0x%lx>\n",
959 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
960 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
961 }
962 *pdi = di;
963 return TRUE;
964 }
965
966 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
967 dwarf2_debug_info_t* di)
968 {
969 struct attribute name;
970 struct attribute size;
971 struct attribute encoding;
972 enum BasicType bt;
973 int cache_idx = -1;
974 if (di->symt) return di->symt;
975
976 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
977
978 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
979 name.u.string = NULL;
980 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
981 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
982
983 switch (encoding.u.uvalue)
984 {
985 case DW_ATE_void: bt = btVoid; break;
986 case DW_ATE_address: bt = btULong; break;
987 case DW_ATE_boolean: bt = btBool; break;
988 case DW_ATE_complex_float: bt = btComplex; break;
989 case DW_ATE_float: bt = btFloat; break;
990 case DW_ATE_signed: bt = btInt; break;
991 case DW_ATE_unsigned: bt = btUInt; break;
992 case DW_ATE_signed_char: bt = btChar; break;
993 case DW_ATE_unsigned_char: bt = btChar; break;
994 default: bt = btNoType; break;
995 }
996 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
997 switch (bt)
998 {
999 case btVoid:
1000 assert(size.u.uvalue == 0);
1001 cache_idx = sc_void;
1002 break;
1003 case btInt:
1004 switch (size.u.uvalue)
1005 {
1006 case 1: cache_idx = sc_int1; break;
1007 case 2: cache_idx = sc_int2; break;
1008 case 4: cache_idx = sc_int4; break;
1009 }
1010 break;
1011 default: break;
1012 }
1013 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1014 ctx->symt_cache[cache_idx] = di->symt;
1015
1016 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1017 return di->symt;
1018 }
1019
1020 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1021 dwarf2_debug_info_t* di)
1022 {
1023 struct symt* ref_type;
1024 struct attribute name;
1025
1026 if (di->symt) return di->symt;
1027
1028 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1029
1030 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1031 ref_type = dwarf2_lookup_type(ctx, di);
1032
1033 if (name.u.string)
1034 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1035 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1036 return di->symt;
1037 }
1038
1039 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1040 dwarf2_debug_info_t* di)
1041 {
1042 struct symt* ref_type;
1043 struct attribute size;
1044
1045 if (di->symt) return di->symt;
1046
1047 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1048
1049 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1050 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1051 {
1052 ref_type = ctx->symt_cache[sc_void];
1053 assert(ref_type);
1054 }
1055 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1056 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1057 return di->symt;
1058 }
1059
1060 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1061 dwarf2_debug_info_t* di)
1062 {
1063 struct symt* ref_type;
1064 struct symt* idx_type = NULL;
1065 struct attribute min, max, cnt;
1066 dwarf2_debug_info_t* child;
1067 unsigned int i;
1068
1069 if (di->symt) return di->symt;
1070
1071 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1072
1073 if (!di->abbrev->have_child)
1074 {
1075 FIXME("array without range information\n");
1076 return NULL;
1077 }
1078 ref_type = dwarf2_lookup_type(ctx, di);
1079
1080 for (i=0; i<vector_length(&di->children); i++)
1081 {
1082 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1083 switch (child->abbrev->tag)
1084 {
1085 case DW_TAG_subrange_type:
1086 idx_type = dwarf2_lookup_type(ctx, child);
1087 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1088 min.u.uvalue = 0;
1089 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1090 max.u.uvalue = 0;
1091 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1092 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1093 break;
1094 default:
1095 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1096 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1097 break;
1098 }
1099 }
1100 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1101 return di->symt;
1102 }
1103
1104 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1105 dwarf2_debug_info_t* di)
1106 {
1107 struct symt* ref_type;
1108
1109 if (di->symt) return di->symt;
1110
1111 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1112
1113 ref_type = dwarf2_lookup_type(ctx, di);
1114 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1115 di->symt = ref_type;
1116
1117 return ref_type;
1118 }
1119
1120 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1121 dwarf2_debug_info_t* di)
1122 {
1123 struct symt* ref_type;
1124
1125 if (di->symt) return di->symt;
1126
1127 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1128
1129 ref_type = dwarf2_lookup_type(ctx, di);
1130 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1131 di->symt = ref_type;
1132
1133 return ref_type;
1134 }
1135
1136 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1137 dwarf2_debug_info_t* di)
1138 {
1139 struct symt* ref_type = NULL;
1140
1141 if (di->symt) return di->symt;
1142
1143 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1144
1145 ref_type = dwarf2_lookup_type(ctx, di);
1146 /* FIXME: for now, we hard-wire C++ references to pointers */
1147 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1148
1149 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1150
1151 return di->symt;
1152 }
1153
1154 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1155 const dwarf2_debug_info_t* di,
1156 struct symt_udt* parent)
1157 {
1158 struct symt* elt_type;
1159 struct attribute name;
1160 struct attribute bit_size;
1161 struct attribute bit_offset;
1162 struct location loc;
1163
1164 assert(parent);
1165
1166 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1167
1168 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1169 elt_type = dwarf2_lookup_type(ctx, di);
1170 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1171 {
1172 if (loc.kind != loc_absolute)
1173 {
1174 FIXME("Found register, while not expecting it\n");
1175 loc.offset = 0;
1176 }
1177 else
1178 TRACE("found member_location at %s -> %lu\n",
1179 dwarf2_debug_ctx(ctx), loc.offset);
1180 }
1181 else
1182 loc.offset = 0;
1183 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1184 bit_size.u.uvalue = 0;
1185 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1186 {
1187 /* FIXME: we should only do this when implementation is LSB (which is
1188 * the case on i386 processors)
1189 */
1190 struct attribute nbytes;
1191 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1192 {
1193 DWORD64 size;
1194 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1195 (unsigned long)size : 0;
1196 }
1197 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1198 }
1199 else bit_offset.u.uvalue = 0;
1200 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1201 (loc.offset << 3) + bit_offset.u.uvalue,
1202 bit_size.u.uvalue);
1203
1204 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1205 }
1206
1207 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1208 dwarf2_debug_info_t* di,
1209 enum UdtKind udt)
1210 {
1211 struct attribute name;
1212 struct attribute size;
1213
1214 if (di->symt) return di->symt;
1215
1216 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1217
1218 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1219 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1220
1221 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1222
1223 if (di->abbrev->have_child) /** any interest to not have child ? */
1224 {
1225 dwarf2_debug_info_t* child;
1226 unsigned int i;
1227
1228 for (i=0; i<vector_length(&di->children); i++)
1229 {
1230 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1231
1232 switch (child->abbrev->tag)
1233 {
1234 case DW_TAG_member:
1235 /* FIXME: should I follow the sibling stuff ?? */
1236 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1237 break;
1238 case DW_TAG_enumeration_type:
1239 dwarf2_parse_enumeration_type(ctx, child);
1240 break;
1241 case DW_TAG_structure_type:
1242 case DW_TAG_class_type:
1243 case DW_TAG_union_type:
1244 case DW_TAG_typedef:
1245 /* FIXME: we need to handle nested udt definitions */
1246 case DW_TAG_inheritance:
1247 case DW_TAG_subprogram:
1248 case DW_TAG_variable:
1249 /* FIXME: some C++ related stuff */
1250 break;
1251 default:
1252 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1253 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1254 break;
1255 }
1256 }
1257 }
1258
1259 return di->symt;
1260 }
1261
1262 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1263 const dwarf2_debug_info_t* di,
1264 struct symt_enum* parent)
1265 {
1266 struct attribute name;
1267 struct attribute value;
1268
1269 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1270
1271 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1272 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1273 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1274
1275 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1276 }
1277
1278 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1279 dwarf2_debug_info_t* di)
1280 {
1281 struct attribute name;
1282 struct attribute size;
1283 struct symt_basic* basetype;
1284
1285 if (di->symt) return di->symt;
1286
1287 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1288
1289 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1290 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1291
1292 switch (size.u.uvalue) /* FIXME: that's wrong */
1293 {
1294 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1295 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1296 default:
1297 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1298 }
1299
1300 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1301
1302 if (di->abbrev->have_child) /* any interest to not have child ? */
1303 {
1304 dwarf2_debug_info_t* child;
1305 unsigned int i;
1306
1307 /* FIXME: should we use the sibling stuff ?? */
1308 for (i=0; i<vector_length(&di->children); i++)
1309 {
1310 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1311
1312 switch (child->abbrev->tag)
1313 {
1314 case DW_TAG_enumerator:
1315 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1316 break;
1317 default:
1318 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1319 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1320 }
1321 }
1322 }
1323 return di->symt;
1324 }
1325
1326 /* structure used to pass information around when parsing a subprogram */
1327 typedef struct dwarf2_subprogram_s
1328 {
1329 dwarf2_parse_context_t* ctx;
1330 struct symt_compiland* compiland;
1331 struct symt_function* func;
1332 BOOL non_computed_variable;
1333 struct location frame;
1334 } dwarf2_subprogram_t;
1335
1336 /******************************************************************
1337 * dwarf2_parse_variable
1338 *
1339 * Parses any variable (parameter, local/global variable)
1340 */
1341 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1342 struct symt_block* block,
1343 dwarf2_debug_info_t* di)
1344 {
1345 struct symt* param_type;
1346 struct attribute name, value;
1347 struct location loc;
1348 BOOL is_pmt;
1349
1350 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1351
1352 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1353 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1354
1355 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1356 /* cannot do much without the name, the functions below won't like it. */
1357 return;
1358 }
1359 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1360 &loc, &subpgm->frame))
1361 {
1362 struct attribute ext;
1363
1364 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1365 name.u.string, loc.kind, loc.offset, loc.reg,
1366 dwarf2_debug_ctx(subpgm->ctx));
1367
1368 switch (loc.kind)
1369 {
1370 case loc_error:
1371 break;
1372 case loc_absolute:
1373 /* it's a global variable */
1374 /* FIXME: we don't handle its scope yet */
1375 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1376 ext.u.uvalue = 0;
1377 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1378 name.u.string, !ext.u.uvalue,
1379 subpgm->ctx->load_offset + loc.offset,
1380 0, param_type);
1381 break;
1382 default:
1383 subpgm->non_computed_variable = TRUE;
1384 /* fall through */
1385 case loc_register:
1386 case loc_regrel:
1387 /* either a pmt/variable relative to frame pointer or
1388 * pmt/variable in a register
1389 */
1390 assert(subpgm->func);
1391 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1392 is_pmt ? DataIsParam : DataIsLocal,
1393 &loc, block, param_type, name.u.string);
1394 break;
1395 }
1396 }
1397 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1398 {
1399 VARIANT v;
1400 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1401 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1402 switch (value.form)
1403 {
1404 case DW_FORM_data1:
1405 case DW_FORM_data2:
1406 case DW_FORM_data4:
1407 case DW_FORM_udata:
1408 case DW_FORM_addr:
1409 v.n1.n2.vt = VT_UI4;
1410 v.n1.n2.n3.lVal = value.u.uvalue;
1411 break;
1412
1413 case DW_FORM_sdata:
1414 v.n1.n2.vt = VT_I4;
1415 v.n1.n2.n3.lVal = value.u.svalue;
1416 break;
1417
1418 case DW_FORM_strp:
1419 case DW_FORM_string:
1420 /* FIXME: native doesn't report const strings from here !!
1421 * however, the value of the string is in the code somewhere
1422 */
1423 v.n1.n2.vt = VT_I1 | VT_BYREF;
1424 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1425 break;
1426
1427 case DW_FORM_block:
1428 case DW_FORM_block1:
1429 case DW_FORM_block2:
1430 case DW_FORM_block4:
1431 v.n1.n2.vt = VT_I4;
1432 switch (value.u.block.size)
1433 {
1434 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1435 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1436 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1437 default:
1438 v.n1.n2.vt = VT_I1 | VT_BYREF;
1439 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1440 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1441 }
1442 break;
1443
1444 case DW_FORM_data8:
1445 v.n1.n2.vt = VT_I1 | VT_BYREF;
1446 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1447 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1448 break;
1449
1450 default:
1451 FIXME("Unsupported form for const value %s (%lx)\n",
1452 name.u.string, value.form);
1453 v.n1.n2.vt = VT_EMPTY;
1454 }
1455 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1456 name.u.string, param_type, &v)->symt;
1457 }
1458 if (is_pmt && subpgm->func && subpgm->func->type)
1459 symt_add_function_signature_parameter(subpgm->ctx->module,
1460 (struct symt_function_signature*)subpgm->func->type,
1461 param_type);
1462
1463 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1464 }
1465
1466 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1467 const dwarf2_debug_info_t* di)
1468 {
1469 struct attribute name;
1470 struct attribute low_pc;
1471 struct location loc;
1472
1473 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1474
1475 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1476 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1477 name.u.string = NULL;
1478
1479 loc.kind = loc_absolute;
1480 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1481 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1482 &loc, name.u.string);
1483 }
1484
1485 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1486 struct symt_block* parent_block,
1487 const dwarf2_debug_info_t* di);
1488
1489 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1490 struct symt_block* parent_block,
1491 const dwarf2_debug_info_t* di)
1492 {
1493 struct symt_block* block;
1494 struct attribute low_pc;
1495 struct attribute high_pc;
1496
1497 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1498
1499 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1500 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1501
1502 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1503 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1504 high_pc.u.uvalue - low_pc.u.uvalue);
1505
1506 if (di->abbrev->have_child) /** any interest to not have child ? */
1507 {
1508 dwarf2_debug_info_t* child;
1509 unsigned int i;
1510
1511 for (i=0; i<vector_length(&di->children); i++)
1512 {
1513 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1514
1515 switch (child->abbrev->tag)
1516 {
1517 case DW_TAG_formal_parameter:
1518 case DW_TAG_variable:
1519 dwarf2_parse_variable(subpgm, block, child);
1520 break;
1521 case DW_TAG_lexical_block:
1522 dwarf2_parse_subprogram_block(subpgm, block, child);
1523 break;
1524 case DW_TAG_inlined_subroutine:
1525 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1526 break;
1527 case DW_TAG_label:
1528 dwarf2_parse_subprogram_label(subpgm, child);
1529 break;
1530 default:
1531 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1532 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1533 dwarf2_debug_di(di));
1534 }
1535 }
1536 }
1537 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1538 }
1539
1540 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1541 struct symt_block* parent_block,
1542 const dwarf2_debug_info_t* di)
1543 {
1544 struct symt_block* block;
1545 struct attribute low_pc;
1546 struct attribute high_pc;
1547
1548 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1549
1550 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc))
1551 low_pc.u.uvalue = 0;
1552 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc))
1553 high_pc.u.uvalue = 0;
1554
1555 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1556 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1557 high_pc.u.uvalue - low_pc.u.uvalue);
1558
1559 if (di->abbrev->have_child) /** any interest to not have child ? */
1560 {
1561 dwarf2_debug_info_t* child;
1562 unsigned int i;
1563
1564 for (i=0; i<vector_length(&di->children); i++)
1565 {
1566 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1567
1568 switch (child->abbrev->tag)
1569 {
1570 case DW_TAG_inlined_subroutine:
1571 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1572 break;
1573 case DW_TAG_variable:
1574 dwarf2_parse_variable(subpgm, block, child);
1575 break;
1576 case DW_TAG_lexical_block:
1577 dwarf2_parse_subprogram_block(subpgm, block, child);
1578 break;
1579 case DW_TAG_subprogram:
1580 /* FIXME: likely a declaration (to be checked)
1581 * skip it for now
1582 */
1583 break;
1584 case DW_TAG_formal_parameter:
1585 /* FIXME: likely elements for exception handling (GCC flavor)
1586 * Skip it for now
1587 */
1588 break;
1589 case DW_TAG_label:
1590 dwarf2_parse_subprogram_label(subpgm, child);
1591 break;
1592 case DW_TAG_class_type:
1593 case DW_TAG_structure_type:
1594 case DW_TAG_union_type:
1595 case DW_TAG_enumeration_type:
1596 case DW_TAG_typedef:
1597 /* the type referred to will be loaded when we need it, so skip it */
1598 break;
1599 default:
1600 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1601 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1602 }
1603 }
1604 }
1605
1606 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1607 }
1608
1609 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1610 dwarf2_debug_info_t* di,
1611 struct symt_compiland* compiland)
1612 {
1613 struct attribute name;
1614 struct attribute low_pc;
1615 struct attribute high_pc;
1616 struct attribute is_decl;
1617 struct attribute inline_flags;
1618 struct symt* ret_type;
1619 struct symt_function_signature* sig_type;
1620 dwarf2_subprogram_t subpgm;
1621
1622 if (di->symt) return di->symt;
1623
1624 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1625
1626 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1627 {
1628 WARN("No name for function... dropping function\n");
1629 return NULL;
1630 }
1631 /* if it's an abstract representation of an inline function, there should be
1632 * a concrete object that we'll handle
1633 */
1634 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1635 {
1636 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1637 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1638 return NULL;
1639 }
1640
1641 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1642 if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1643 /* As functions (defined as inline assembly) get debug info with dwarf
1644 * (not the case for stabs), we just drop Wine's thunks here...
1645 * Actual thunks will be created in elf_module from the symbol table
1646 */
1647 if (elf_is_in_thunk_area(ctx->load_offset + low_pc.u.uvalue,
1648 ctx->thunks) >= 0)
1649 return NULL;
1650 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1651 is_decl.u.uvalue = 0;
1652
1653 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1654 {
1655 ret_type = ctx->symt_cache[sc_void];
1656 assert(ret_type);
1657 }
1658
1659 /* FIXME: assuming C source code */
1660 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1661 if (!is_decl.u.uvalue)
1662 {
1663 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1664 ctx->load_offset + low_pc.u.uvalue,
1665 high_pc.u.uvalue - low_pc.u.uvalue,
1666 &sig_type->symt);
1667 di->symt = &subpgm.func->symt;
1668 }
1669 else subpgm.func = NULL;
1670
1671 subpgm.ctx = ctx;
1672 subpgm.compiland = compiland;
1673 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1674 &subpgm.frame, NULL))
1675 {
1676 /* on stack !! */
1677 subpgm.frame.kind = loc_regrel;
1678 subpgm.frame.reg = 0;
1679 subpgm.frame.offset = 0;
1680 }
1681 subpgm.non_computed_variable = FALSE;
1682
1683 if (di->abbrev->have_child) /** any interest to not have child ? */
1684 {
1685 dwarf2_debug_info_t* child;
1686 unsigned int i;
1687
1688 for (i=0; i<vector_length(&di->children); i++)
1689 {
1690 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1691
1692 switch (child->abbrev->tag)
1693 {
1694 case DW_TAG_variable:
1695 case DW_TAG_formal_parameter:
1696 dwarf2_parse_variable(&subpgm, NULL, child);
1697 break;
1698 case DW_TAG_lexical_block:
1699 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1700 break;
1701 case DW_TAG_inlined_subroutine:
1702 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1703 break;
1704 case DW_TAG_subprogram:
1705 /* FIXME: likely a declaration (to be checked)
1706 * skip it for now
1707 */
1708 break;
1709 case DW_TAG_label:
1710 dwarf2_parse_subprogram_label(&subpgm, child);
1711 break;
1712 case DW_TAG_class_type:
1713 case DW_TAG_structure_type:
1714 case DW_TAG_union_type:
1715 case DW_TAG_enumeration_type:
1716 case DW_TAG_typedef:
1717 /* the type referred to will be loaded when we need it, so skip it */
1718 break;
1719 case DW_TAG_unspecified_parameters:
1720 /* FIXME: no support in dbghelp's internals so far */
1721 break;
1722 default:
1723 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1724 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1725 }
1726 }
1727 }
1728
1729 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1730 {
1731 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1732 &subpgm.frame, NULL);
1733 }
1734 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1735
1736 return di->symt;
1737 }
1738
1739 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1740 dwarf2_debug_info_t* di)
1741 {
1742 struct symt* ret_type;
1743 struct symt_function_signature* sig_type;
1744
1745 if (di->symt) return di->symt;
1746
1747 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1748
1749 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1750 {
1751 ret_type = ctx->symt_cache[sc_void];
1752 assert(ret_type);
1753 }
1754
1755 /* FIXME: assuming C source code */
1756 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1757
1758 if (di->abbrev->have_child) /** any interest to not have child ? */
1759 {
1760 dwarf2_debug_info_t* child;
1761 unsigned int i;
1762
1763 for (i=0; i<vector_length(&di->children); i++)
1764 {
1765 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1766
1767 switch (child->abbrev->tag)
1768 {
1769 case DW_TAG_formal_parameter:
1770 symt_add_function_signature_parameter(ctx->module, sig_type,
1771 dwarf2_lookup_type(ctx, child));
1772 break;
1773 case DW_TAG_unspecified_parameters:
1774 WARN("Unsupported unspecified parameters\n");
1775 break;
1776 }
1777 }
1778 }
1779
1780 return di->symt = &sig_type->symt;
1781 }
1782
1783 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1784 dwarf2_debug_info_t* di,
1785 struct symt_compiland* compiland)
1786 {
1787 switch (di->abbrev->tag)
1788 {
1789 case DW_TAG_typedef:
1790 dwarf2_parse_typedef(ctx, di);
1791 break;
1792 case DW_TAG_base_type:
1793 dwarf2_parse_base_type(ctx, di);
1794 break;
1795 case DW_TAG_pointer_type:
1796 dwarf2_parse_pointer_type(ctx, di);
1797 break;
1798 case DW_TAG_class_type:
1799 dwarf2_parse_udt_type(ctx, di, UdtClass);
1800 break;
1801 case DW_TAG_structure_type:
1802 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1803 break;
1804 case DW_TAG_union_type:
1805 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1806 break;
1807 case DW_TAG_array_type:
1808 dwarf2_parse_array_type(ctx, di);
1809 break;
1810 case DW_TAG_const_type:
1811 dwarf2_parse_const_type(ctx, di);
1812 break;
1813 case DW_TAG_volatile_type:
1814 dwarf2_parse_volatile_type(ctx, di);
1815 break;
1816 case DW_TAG_reference_type:
1817 dwarf2_parse_reference_type(ctx, di);
1818 break;
1819 case DW_TAG_enumeration_type:
1820 dwarf2_parse_enumeration_type(ctx, di);
1821 break;
1822 case DW_TAG_subprogram:
1823 dwarf2_parse_subprogram(ctx, di, compiland);
1824 break;
1825 case DW_TAG_subroutine_type:
1826 dwarf2_parse_subroutine_type(ctx, di);
1827 break;
1828 case DW_TAG_variable:
1829 {
1830 dwarf2_subprogram_t subpgm;
1831
1832 subpgm.ctx = ctx;
1833 subpgm.compiland = compiland;
1834 subpgm.func = NULL;
1835 subpgm.frame.kind = loc_absolute;
1836 subpgm.frame.offset = 0;
1837 subpgm.frame.reg = Wine_DW_no_register;
1838 dwarf2_parse_variable(&subpgm, NULL, di);
1839 }
1840 break;
1841 /* silence a couple of C++ defines */
1842 case DW_TAG_namespace:
1843 case DW_TAG_imported_module:
1844 case DW_TAG_imported_declaration:
1845 break;
1846 default:
1847 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1848 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1849 }
1850 }
1851
1852 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1853 const struct vector* v, unsigned file, unsigned line)
1854 {
1855 struct symt_function* func;
1856 struct symt_ht* symt;
1857 unsigned* psrc;
1858
1859 if (!file || !(psrc = vector_at(v, file - 1))) return;
1860
1861 TRACE("%s %lx %s %u\n",
1862 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
1863 if (!(symt = symt_find_nearest(module, address)) ||
1864 symt->symt.tag != SymTagFunction) return;
1865 func = (struct symt_function*)symt;
1866 symt_add_func_line(module, func, *psrc, line, address - func->address);
1867 }
1868
1869 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
1870 dwarf2_parse_context_t* ctx,
1871 const char* compile_dir,
1872 unsigned long offset)
1873 {
1874 dwarf2_traverse_context_t traverse;
1875 unsigned long length;
1876 unsigned version, header_len, insn_size, default_stmt;
1877 unsigned line_range, opcode_base;
1878 int line_base;
1879 const unsigned char* opcode_len;
1880 struct vector dirs;
1881 struct vector files;
1882 const char** p;
1883
1884 /* section with line numbers stripped */
1885 if (sections[section_line].address == ELF_NO_MAP)
1886 return FALSE;
1887
1888 traverse.data = sections[section_line].address + offset;
1889 traverse.start_data = traverse.data;
1890 traverse.end_data = traverse.data + 4;
1891 traverse.word_size = ctx->word_size;
1892
1893 length = dwarf2_parse_u4(&traverse);
1894 traverse.end_data = traverse.start_data + length;
1895
1896 version = dwarf2_parse_u2(&traverse);
1897 header_len = dwarf2_parse_u4(&traverse);
1898 insn_size = dwarf2_parse_byte(&traverse);
1899 default_stmt = dwarf2_parse_byte(&traverse);
1900 line_base = (signed char)dwarf2_parse_byte(&traverse);
1901 line_range = dwarf2_parse_byte(&traverse);
1902 opcode_base = dwarf2_parse_byte(&traverse);
1903
1904 opcode_len = traverse.data;
1905 traverse.data += opcode_base - 1;
1906
1907 vector_init(&dirs, sizeof(const char*), 4);
1908 p = vector_add(&dirs, &ctx->pool);
1909 *p = compile_dir ? compile_dir : ".";
1910 while (*traverse.data)
1911 {
1912 const char* rel = (const char*)traverse.data;
1913 unsigned rellen = strlen(rel);
1914 TRACE("Got include %s\n", rel);
1915 traverse.data += rellen + 1;
1916 p = vector_add(&dirs, &ctx->pool);
1917
1918 if (*rel == '/' || !compile_dir)
1919 *p = rel;
1920 else
1921 {
1922 /* include directory relative to compile directory */
1923 unsigned baselen = strlen(compile_dir);
1924 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
1925 strcpy(tmp, compile_dir);
1926 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
1927 strcpy(&tmp[baselen], rel);
1928 *p = tmp;
1929 }
1930
1931 }
1932 traverse.data++;
1933
1934 vector_init(&files, sizeof(unsigned), 16);
1935 while (*traverse.data)
1936 {
1937 unsigned int dir_index, mod_time, length;
1938 const char* name;
1939 const char* dir;
1940 unsigned* psrc;
1941
1942 name = (const char*)traverse.data;
1943 traverse.data += strlen(name) + 1;
1944 dir_index = dwarf2_leb128_as_unsigned(&traverse);
1945 mod_time = dwarf2_leb128_as_unsigned(&traverse);
1946 length = dwarf2_leb128_as_unsigned(&traverse);
1947 dir = *(const char**)vector_at(&dirs, dir_index);
1948 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
1949 psrc = vector_add(&files, &ctx->pool);
1950 *psrc = source_new(ctx->module, dir, name);
1951 }
1952 traverse.data++;
1953
1954 while (traverse.data < traverse.end_data)
1955 {
1956 unsigned long address = 0;
1957 unsigned file = 1;
1958 unsigned line = 1;
1959 unsigned is_stmt = default_stmt;
1960 BOOL basic_block = FALSE, end_sequence = FALSE;
1961 unsigned opcode, extopcode, i;
1962
1963 while (!end_sequence)
1964 {
1965 opcode = dwarf2_parse_byte(&traverse);
1966 TRACE("Got opcode %x\n", opcode);
1967
1968 if (opcode >= opcode_base)
1969 {
1970 unsigned delta = opcode - opcode_base;
1971
1972 address += (delta / line_range) * insn_size;
1973 line += line_base + (delta % line_range);
1974 basic_block = TRUE;
1975 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1976 }
1977 else
1978 {
1979 switch (opcode)
1980 {
1981 case DW_LNS_copy:
1982 basic_block = FALSE;
1983 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1984 break;
1985 case DW_LNS_advance_pc:
1986 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
1987 break;
1988 case DW_LNS_advance_line:
1989 line += dwarf2_leb128_as_signed(&traverse);
1990 break;
1991 case DW_LNS_set_file:
1992 file = dwarf2_leb128_as_unsigned(&traverse);
1993 break;
1994 case DW_LNS_set_column:
1995 dwarf2_leb128_as_unsigned(&traverse);
1996 break;
1997 case DW_LNS_negate_stmt:
1998 is_stmt = !is_stmt;
1999 break;
2000 case DW_LNS_set_basic_block:
2001 basic_block = 1;
2002 break;
2003 case DW_LNS_const_add_pc:
2004 address += ((255 - opcode_base) / line_range) * insn_size;
2005 break;
2006 case DW_LNS_fixed_advance_pc:
2007 address += dwarf2_parse_u2(&traverse);
2008 break;
2009 case DW_LNS_extended_op:
2010 dwarf2_leb128_as_unsigned(&traverse);
2011 extopcode = dwarf2_parse_byte(&traverse);
2012 switch (extopcode)
2013 {
2014 case DW_LNE_end_sequence:
2015 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2016 end_sequence = TRUE;
2017 break;
2018 case DW_LNE_set_address:
2019 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2020 break;
2021 case DW_LNE_define_file:
2022 FIXME("not handled %s\n", traverse.data);
2023 traverse.data += strlen((const char *)traverse.data) + 1;
2024 dwarf2_leb128_as_unsigned(&traverse);
2025 dwarf2_leb128_as_unsigned(&traverse);
2026 dwarf2_leb128_as_unsigned(&traverse);
2027 break;
2028 default:
2029 FIXME("Unsupported extended opcode %x\n", extopcode);
2030 break;
2031 }
2032 break;
2033 default:
2034 WARN("Unsupported opcode %x\n", opcode);
2035 for (i = 0; i < opcode_len[opcode]; i++)
2036 dwarf2_leb128_as_unsigned(&traverse);
2037 break;
2038 }
2039 }
2040 }
2041 }
2042 return TRUE;
2043 }
2044
2045 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2046 struct module* module,
2047 const struct elf_thunk_area* thunks,
2048 dwarf2_traverse_context_t* mod_ctx,
2049 unsigned long load_offset)
2050 {
2051 dwarf2_parse_context_t ctx;
2052 dwarf2_traverse_context_t abbrev_ctx;
2053 dwarf2_debug_info_t* di;
2054 dwarf2_traverse_context_t cu_ctx;
2055 const unsigned char* comp_unit_start = mod_ctx->data;
2056 unsigned long cu_length;
2057 unsigned short cu_version;
2058 unsigned long cu_abbrev_offset;
2059 BOOL ret = FALSE;
2060
2061 cu_length = dwarf2_parse_u4(mod_ctx);
2062 cu_ctx.data = cu_ctx.start_data = mod_ctx->data;
2063 cu_ctx.end_data = mod_ctx->data + cu_length;
2064 mod_ctx->data += cu_length;
2065 cu_version = dwarf2_parse_u2(&cu_ctx);
2066 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2067 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2068
2069 TRACE("Compilation Unit Header found at 0x%x:\n",
2070 (int)(comp_unit_start - sections[section_debug].address));
2071 TRACE("- length: %lu\n", cu_length);
2072 TRACE("- version: %u\n", cu_version);
2073 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2074 TRACE("- word_size: %u\n", cu_ctx.word_size);
2075
2076 if (cu_version != 2)
2077 {
2078 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2079 cu_version);
2080 return FALSE;
2081 }
2082
2083 pool_init(&ctx.pool, 65536);
2084 ctx.sections = sections;
2085 ctx.section = section_debug;
2086 ctx.module = module;
2087 ctx.word_size = cu_ctx.word_size;
2088 ctx.thunks = thunks;
2089 ctx.load_offset = load_offset;
2090 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2091 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2092 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2093
2094 abbrev_ctx.start_data = sections[section_abbrev].address + cu_abbrev_offset;
2095 abbrev_ctx.data = abbrev_ctx.start_data;
2096 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2097 abbrev_ctx.word_size = cu_ctx.word_size;
2098 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2099
2100 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2101 dwarf2_read_one_debug_info(&ctx, &cu_ctx, &di);
2102
2103 if (di->abbrev->tag == DW_TAG_compile_unit)
2104 {
2105 struct attribute name;
2106 dwarf2_debug_info_t** pdi = NULL;
2107 struct attribute stmt_list, low_pc;
2108 struct attribute comp_dir;
2109
2110 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2111 name.u.string = NULL;
2112
2113 /* get working directory of current compilation unit */
2114 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2115 comp_dir.u.string = NULL;
2116
2117 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2118 low_pc.u.uvalue = 0;
2119 di->symt = &symt_new_compiland(module,
2120 ctx.load_offset + low_pc.u.uvalue,
2121 source_new(module, comp_dir.u.string, name.u.string))->symt;
2122
2123 if (di->abbrev->have_child)
2124 {
2125 unsigned int i;
2126 for (i=0; i<vector_length(&di->children); i++)
2127 {
2128 pdi = vector_at(&di->children, i);
2129 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2130 }
2131 }
2132 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2133 {
2134 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2135 module->module.LineNumbers = TRUE;
2136 }
2137 ret = TRUE;
2138 }
2139 else FIXME("Should have a compilation unit here\n");
2140 pool_destroy(&ctx.pool);
2141 return ret;
2142 }
2143
2144 static BOOL dwarf2_lookup_loclist(const struct module* module, const BYTE* start,
2145 unsigned long ip,
2146 dwarf2_traverse_context_t* lctx)
2147 {
2148 DWORD beg, end;
2149 const BYTE* ptr = start;
2150 DWORD len;
2151
2152 while (ptr < module->dwarf2_info->debug_loc.address + module->dwarf2_info->debug_loc.size)
2153 {
2154 beg = dwarf2_get_u4(ptr); ptr += 4;
2155 end = dwarf2_get_u4(ptr); ptr += 4;
2156 if (!beg && !end) break;
2157 len = dwarf2_get_u2(ptr); ptr += 2;
2158
2159 if (beg <= ip && ip < end)
2160 {
2161 lctx->data = ptr;
2162 lctx->end_data = ptr + len;
2163 lctx->word_size = 4; /* FIXME word size !!! */
2164 return TRUE;
2165 }
2166 ptr += len;
2167 }
2168 WARN("Couldn't find ip in location list\n");
2169 return FALSE;
2170 }
2171
2172 static enum location_error loc_compute_frame(struct process* pcs,
2173 const struct module* module,
2174 const struct symt_function* func,
2175 DWORD ip, struct location* frame)
2176 {
2177 struct symt** psym = NULL;
2178 struct location* pframe;
2179 dwarf2_traverse_context_t lctx;
2180 enum location_error err;
2181 unsigned int i;
2182
2183 for (i=0; i<vector_length(&func->vchildren); i++)
2184 {
2185 psym = vector_at(&func->vchildren, i);
2186 if ((*psym)->tag == SymTagCustom)
2187 {
2188 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2189
2190 /* First, recompute the frame information, if needed */
2191 switch (pframe->kind)
2192 {
2193 case loc_regrel:
2194 case loc_register:
2195 *frame = *pframe;
2196 break;
2197 case loc_dwarf2_location_list:
2198 WARN("Searching loclist for %s\n", func->hash_elt.name);
2199 if (!dwarf2_lookup_loclist(module,
2200 module->dwarf2_info->debug_loc.address + pframe->offset,
2201 ip, &lctx))
2202 return loc_err_out_of_scope;
2203 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2204 if (frame->kind >= loc_user)
2205 {
2206 WARN("Couldn't compute runtime frame location\n");
2207 return loc_err_too_complex;
2208 }
2209 break;
2210 default:
2211 WARN("Unsupported frame kind %d\n", pframe->kind);
2212 return loc_err_internal;
2213 }
2214 return 0;
2215 }
2216 }
2217 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2218 return loc_err_internal;
2219 }
2220
2221 static void dwarf2_location_compute(struct process* pcs,
2222 const struct module* module,
2223 const struct symt_function* func,
2224 struct location* loc)
2225 {
2226 struct location frame;
2227 DWORD ip;
2228 int err;
2229 dwarf2_traverse_context_t lctx;
2230
2231 if (!func->container || func->container->tag != SymTagCompiland)
2232 {
2233 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
2234 err = loc_err_internal;
2235 }
2236 else
2237 {
2238 /* instruction pointer relative to compiland's start */
2239 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
2240
2241 if ((err = loc_compute_frame(pcs, module, func, ip, &frame)) == 0)
2242 {
2243 switch (loc->kind)
2244 {
2245 case loc_dwarf2_location_list:
2246 /* Then, if the variable has a location list, find it !! */
2247 if (dwarf2_lookup_loclist(module,
2248 module->dwarf2_info->debug_loc.address + loc->offset,
2249 ip, &lctx))
2250 goto do_compute;
2251 err = loc_err_out_of_scope;
2252 break;
2253 case loc_dwarf2_block:
2254 /* or if we have a copy of an existing block, get ready for it */
2255 {
2256 unsigned* ptr = (unsigned*)loc->offset;
2257
2258 lctx.data = (const BYTE*)(ptr + 1);
2259 lctx.end_data = lctx.data + *ptr;
2260 lctx.word_size = 4; /* FIXME !! */
2261 }
2262 do_compute:
2263 /* now get the variable */
2264 err = compute_location(&lctx, loc, pcs->handle, &frame);
2265 break;
2266 case loc_register:
2267 case loc_regrel:
2268 /* nothing to do */
2269 break;
2270 default:
2271 WARN("Unsupported local kind %d\n", loc->kind);
2272 err = loc_err_internal;
2273 }
2274 }
2275 }
2276 if (err < 0)
2277 {
2278 loc->kind = loc_register;
2279 loc->reg = err;
2280 }
2281 }
2282
2283 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
2284 const struct elf_thunk_area* thunks,
2285 const unsigned char* debug, unsigned int debug_size,
2286 const unsigned char* abbrev, unsigned int abbrev_size,
2287 const unsigned char* str, unsigned int str_size,
2288 const unsigned char* line, unsigned int line_size,
2289 const unsigned char* loclist, unsigned int loclist_size)
2290 {
2291 dwarf2_section_t section[section_max];
2292 unsigned char* ptr;
2293 dwarf2_traverse_context_t mod_ctx;
2294
2295 mod_ctx.start_data = mod_ctx.data = debug;
2296 mod_ctx.end_data = debug + debug_size;
2297
2298 module->loc_compute = dwarf2_location_compute;
2299
2300 section[section_debug].address = debug;
2301 section[section_debug].size = debug_size;
2302 section[section_abbrev].address = abbrev;
2303 section[section_abbrev].size = abbrev_size;
2304 section[section_string].address = str;
2305 section[section_string].size = str_size;
2306 section[section_line].address = line;
2307 section[section_line].size = line_size;
2308
2309 if (loclist_size)
2310 {
2311 /* initialize the dwarf2 specific info block for this module.
2312 * As we'll need later on the .debug_loc section content, we copy it in
2313 * the module structure for later reuse
2314 */
2315 module->dwarf2_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*module->dwarf2_info) + loclist_size);
2316 if (!module->dwarf2_info) return FALSE;
2317 ptr = (unsigned char*)(module->dwarf2_info + 1);
2318 memcpy(ptr, loclist, loclist_size);
2319 module->dwarf2_info->debug_loc.address = ptr;
2320 module->dwarf2_info->debug_loc.size = loclist_size;
2321 }
2322
2323 while (mod_ctx.data < mod_ctx.end_data)
2324 {
2325 dwarf2_parse_compilation_unit(section, module, thunks, &mod_ctx, load_offset);
2326 }
2327 module->module.SymType = SymDia;
2328 module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
2329 /* FIXME: we could have a finer grain here */
2330 module->module.GlobalSymbols = TRUE;
2331 module->module.TypeInfo = TRUE;
2332 module->module.SourceIndexed = TRUE;
2333 module->module.Publics = TRUE;
2334 return TRUE;
2335 }
useful hacks and other patches not (yet) suitable for mainline