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mmdevapi: Fix compiler warnings with flag -Wcast-qual.
[wine.git] / dlls / dbghelp / dwarf.c
blob78860d76303597d80dbd136910ffb8b6d99b9ed0
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2010, Eric Pouech
6 * Copyright (C) 2010, Alexandre Julliard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #define NONAMELESSUNION
24
25 #include "config.h"
26
27 #include <sys/types.h>
28 #include <fcntl.h>
29 #ifdef HAVE_SYS_STAT_H
30 # include <sys/stat.h>
31 #endif
32 #ifdef HAVE_SYS_MMAN_H
33 #include <sys/mman.h>
34 #endif
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #ifdef HAVE_UNISTD_H
39 # include <unistd.h>
40 #endif
41 #include <stdio.h>
42 #ifndef PATH_MAX
43 #define PATH_MAX MAX_PATH
44 #endif
45 #include <assert.h>
46 #include <stdarg.h>
47
48 #include "windef.h"
49 #include "winbase.h"
50 #include "winuser.h"
51 #include "ole2.h"
52 #include "oleauto.h"
53
54 #include "dbghelp_private.h"
55 #include "image_private.h"
56
57 #include "wine/debug.h"
58
59 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
60
61 /* FIXME:
62 * - Functions:
63 * o unspecified parameters
64 * o inlined functions
65 * o Debug{Start|End}Point
66 * o CFA
67 * - Udt
68 * o proper types loading (nesting)
69 */
70
71 #if 0
72 static void dump(const void* ptr, unsigned len)
73 {
74 int i, j;
75 BYTE msg[128];
76 static const char hexof[] = "0123456789abcdef";
77 const BYTE* x = ptr;
78
79 for (i = 0; i < len; i += 16)
80 {
81 sprintf(msg, "%08x: ", i);
82 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
83 for (j = 0; j < min(16, len - i); j++)
84 {
85 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
86 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
87 msg[10 + 3 * j + 2] = ' ';
88 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
89 x[i + j] : '.';
90 }
91 msg[10 + 3 * 16] = ' ';
92 msg[10 + 3 * 16 + 1 + 16] = '\0';
93 TRACE("%s\n", msg);
94 }
95 }
96 #endif
97
98 /**
99 *
100 * Main Specs:
101 * http://www.eagercon.com/dwarf/dwarf3std.htm
102 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
103 *
104 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
105 *
106 * example of projects who do dwarf2 parsing:
107 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
108 * http://elis.ugent.be/diota/log/ltrace_elf.c
109 */
110 #include "dwarf.h"
111
112 /**
113 * Parsers
114 */
115
116 typedef struct dwarf2_abbrev_entry_attr_s
117 {
118 unsigned long attribute;
119 unsigned long form;
120 struct dwarf2_abbrev_entry_attr_s* next;
121 } dwarf2_abbrev_entry_attr_t;
122
123 typedef struct dwarf2_abbrev_entry_s
124 {
125 unsigned long entry_code;
126 unsigned long tag;
127 unsigned char have_child;
128 unsigned num_attr;
129 dwarf2_abbrev_entry_attr_t* attrs;
130 } dwarf2_abbrev_entry_t;
131
132 struct dwarf2_block
133 {
134 unsigned size;
135 const unsigned char* ptr;
136 };
137
138 struct attribute
139 {
140 unsigned long form;
141 union
142 {
143 unsigned long uvalue;
144 ULONGLONG lluvalue;
145 long svalue;
146 const char* string;
147 struct dwarf2_block block;
148 } u;
149 };
150
151 typedef struct dwarf2_debug_info_s
152 {
153 const dwarf2_abbrev_entry_t*abbrev;
154 struct symt* symt;
155 const unsigned char** data;
156 struct vector children;
157 } dwarf2_debug_info_t;
158
159 typedef struct dwarf2_section_s
160 {
161 const unsigned char* address;
162 unsigned size;
163 DWORD_PTR rva;
164 } dwarf2_section_t;
165
166 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_max};
167
168 typedef struct dwarf2_traverse_context_s
169 {
170 const unsigned char* data;
171 const unsigned char* end_data;
172 unsigned char word_size;
173 } dwarf2_traverse_context_t;
174
175 /* symt_cache indexes */
176 #define sc_void 0
177 #define sc_int1 1
178 #define sc_int2 2
179 #define sc_int4 3
180 #define sc_num 4
181
182 typedef struct dwarf2_parse_context_s
183 {
184 const dwarf2_section_t* sections;
185 unsigned section;
186 struct pool pool;
187 struct module* module;
188 const struct elf_thunk_area*thunks;
189 struct sparse_array abbrev_table;
190 struct sparse_array debug_info_table;
191 unsigned long load_offset;
192 unsigned long ref_offset;
193 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
194 } dwarf2_parse_context_t;
195
196 /* stored in the dbghelp's module internal structure for later reuse */
197 struct dwarf2_module_info_s
198 {
199 dwarf2_section_t debug_loc;
200 dwarf2_section_t debug_frame;
201 dwarf2_section_t eh_frame;
202 unsigned char word_size;
203 };
204
205 #define loc_dwarf2_location_list (loc_user + 0)
206 #define loc_dwarf2_block (loc_user + 1)
207
208 /* forward declarations */
209 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
210
211 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
212 {
213 return *ptr;
214 }
215
216 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
217 {
218 unsigned char uvalue = dwarf2_get_byte(ctx->data);
219 ctx->data += 1;
220 return uvalue;
221 }
222
223 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
224 {
225 return *(const UINT16*)ptr;
226 }
227
228 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
229 {
230 unsigned short uvalue = dwarf2_get_u2(ctx->data);
231 ctx->data += 2;
232 return uvalue;
233 }
234
235 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
236 {
237 return *(const UINT32*)ptr;
238 }
239
240 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
241 {
242 unsigned long uvalue = dwarf2_get_u4(ctx->data);
243 ctx->data += 4;
244 return uvalue;
245 }
246
247 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
248 {
249 return *(const UINT64*)ptr;
250 }
251
252 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
253 {
254 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
255 ctx->data += 8;
256 return uvalue;
257 }
258
259 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
260 {
261 unsigned long ret = 0;
262 unsigned char byte;
263 unsigned shift = 0;
264
265 do
266 {
267 byte = dwarf2_get_byte(ptr++);
268 ret |= (byte & 0x7f) << shift;
269 shift += 7;
270 } while (byte & 0x80);
271
272 if (end) *end = ptr;
273 return ret;
274 }
275
276 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
277 {
278 unsigned long ret;
279
280 assert(ctx);
281
282 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
283
284 return ret;
285 }
286
287 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
288 {
289 long ret = 0;
290 unsigned char byte;
291 unsigned shift = 0;
292 const unsigned size = sizeof(int) * 8;
293
294 do
295 {
296 byte = dwarf2_get_byte(ptr++);
297 ret |= (byte & 0x7f) << shift;
298 shift += 7;
299 } while (byte & 0x80);
300 if (end) *end = ptr;
301
302 /* as spec: sign bit of byte is 2nd high order bit (80x40)
303 * -> 0x80 is used as flag.
304 */
305 if ((shift < size) && (byte & 0x40))
306 {
307 ret |= - (1 << shift);
308 }
309 return ret;
310 }
311
312 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
313 {
314 long ret = 0;
315
316 assert(ctx);
317
318 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
319 return ret;
320 }
321
322 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
323 {
324 unsigned ret;
325 for (ret = 0; ctx->data[ret] & 0x80; ret++);
326 return ret + 1;
327 }
328
329 /******************************************************************
330 * dwarf2_get_addr
331 *
332 * Returns an address.
333 * We assume that in all cases word size from Dwarf matches the size of
334 * addresses in platform where the exec is compiled.
335 */
336 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
337 {
338 unsigned long ret;
339
340 switch (word_size)
341 {
342 case 4:
343 ret = dwarf2_get_u4(ptr);
344 break;
345 case 8:
346 ret = dwarf2_get_u8(ptr);
347 break;
348 default:
349 FIXME("Unsupported Word Size %u\n", word_size);
350 ret = 0;
351 }
352 return ret;
353 }
354
355 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
356 {
357 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
358 ctx->data += ctx->word_size;
359 return ret;
360 }
361
362 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
363 {
364 return wine_dbg_sprintf("ctx(%p)", ctx->data);
365 }
366
367 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
368 {
369 return wine_dbg_sprintf("ctx(%p,%s)",
370 ctx, debugstr_w(ctx->module->module.ModuleName));
371 }
372
373 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
374 {
375 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
376 di->abbrev, di->symt);
377 }
378
379 static dwarf2_abbrev_entry_t*
380 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
381 unsigned long entry_code)
382 {
383 assert( NULL != abbrev_table );
384 return sparse_array_find(abbrev_table, entry_code);
385 }
386
387 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
388 struct sparse_array* abbrev_table,
389 struct pool* pool)
390 {
391 unsigned long entry_code;
392 dwarf2_abbrev_entry_t* abbrev_entry;
393 dwarf2_abbrev_entry_attr_t* new = NULL;
394 dwarf2_abbrev_entry_attr_t* last = NULL;
395 unsigned long attribute;
396 unsigned long form;
397
398 assert( NULL != abbrev_ctx );
399
400 TRACE("%s, end at %p\n",
401 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
402
403 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
404 while (abbrev_ctx->data < abbrev_ctx->end_data)
405 {
406 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
407 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
408 TRACE("found entry_code %lu\n", entry_code);
409 if (!entry_code)
410 {
411 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
412 break;
413 }
414 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
415 assert( NULL != abbrev_entry );
416
417 abbrev_entry->entry_code = entry_code;
418 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
419 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
420 abbrev_entry->attrs = NULL;
421 abbrev_entry->num_attr = 0;
422
423 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
424 abbrev_table, sparse_array_length(abbrev_table),
425 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
426
427 last = NULL;
428 while (1)
429 {
430 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
431 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
432 if (!attribute) break;
433
434 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
435 assert(new);
436
437 new->attribute = attribute;
438 new->form = form;
439 new->next = NULL;
440 if (abbrev_entry->attrs) last->next = new;
441 else abbrev_entry->attrs = new;
442 last = new;
443 abbrev_entry->num_attr++;
444 }
445 }
446 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
447 }
448
449 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
450 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
451 {
452 unsigned step;
453
454 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
455
456 switch (abbrev_attr->form)
457 {
458 case DW_FORM_ref_addr:
459 case DW_FORM_addr: step = ctx->word_size; break;
460 case DW_FORM_flag:
461 case DW_FORM_data1:
462 case DW_FORM_ref1: step = 1; break;
463 case DW_FORM_data2:
464 case DW_FORM_ref2: step = 2; break;
465 case DW_FORM_data4:
466 case DW_FORM_ref4:
467 case DW_FORM_strp: step = 4; break;
468 case DW_FORM_data8:
469 case DW_FORM_ref8: step = 8; break;
470 case DW_FORM_sdata:
471 case DW_FORM_ref_udata:
472 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
473 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
474 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
475 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
476 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
477 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
478 default:
479 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
480 return;
481 }
482 ctx->data += step;
483 }
484
485 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
486 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
487 const unsigned char* data,
488 struct attribute* attr)
489 {
490 attr->form = abbrev_attr->form;
491 switch (attr->form)
492 {
493 case DW_FORM_ref_addr:
494 case DW_FORM_addr:
495 attr->u.uvalue = dwarf2_get_addr(data,
496 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
497 TRACE("addr<0x%lx>\n", attr->u.uvalue);
498 break;
499
500 case DW_FORM_flag:
501 attr->u.uvalue = dwarf2_get_byte(data);
502 TRACE("flag<0x%lx>\n", attr->u.uvalue);
503 break;
504
505 case DW_FORM_data1:
506 attr->u.uvalue = dwarf2_get_byte(data);
507 TRACE("data1<%lu>\n", attr->u.uvalue);
508 break;
509
510 case DW_FORM_data2:
511 attr->u.uvalue = dwarf2_get_u2(data);
512 TRACE("data2<%lu>\n", attr->u.uvalue);
513 break;
514
515 case DW_FORM_data4:
516 attr->u.uvalue = dwarf2_get_u4(data);
517 TRACE("data4<%lu>\n", attr->u.uvalue);
518 break;
519
520 case DW_FORM_data8:
521 attr->u.lluvalue = dwarf2_get_u8(data);
522 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
523 break;
524
525 case DW_FORM_ref1:
526 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
527 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
528 break;
529
530 case DW_FORM_ref2:
531 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
532 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
533 break;
534
535 case DW_FORM_ref4:
536 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
537 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
538 break;
539
540 case DW_FORM_ref8:
541 FIXME("Unhandled 64 bit support\n");
542 break;
543
544 case DW_FORM_sdata:
545 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
546 break;
547
548 case DW_FORM_ref_udata:
549 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
550 break;
551
552 case DW_FORM_udata:
553 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
554 break;
555
556 case DW_FORM_string:
557 attr->u.string = (const char *)data;
558 TRACE("string<%s>\n", attr->u.string);
559 break;
560
561 case DW_FORM_strp:
562 {
563 unsigned long offset = dwarf2_get_u4(data);
564 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
565 }
566 TRACE("strp<%s>\n", attr->u.string);
567 break;
568
569 case DW_FORM_block:
570 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
571 break;
572
573 case DW_FORM_block1:
574 attr->u.block.size = dwarf2_get_byte(data);
575 attr->u.block.ptr = data + 1;
576 break;
577
578 case DW_FORM_block2:
579 attr->u.block.size = dwarf2_get_u2(data);
580 attr->u.block.ptr = data + 2;
581 break;
582
583 case DW_FORM_block4:
584 attr->u.block.size = dwarf2_get_u4(data);
585 attr->u.block.ptr = data + 4;
586 break;
587
588 default:
589 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
590 break;
591 }
592 }
593
594 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
595 const dwarf2_debug_info_t* di,
596 unsigned at, struct attribute* attr)
597 {
598 unsigned i, ai = 0;
599 dwarf2_abbrev_entry_attr_t* abbrev_attr;
600 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
601
602 while (di)
603 {
604 abstract_abbrev_attr = NULL;
605 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
606 {
607 if (abbrev_attr->attribute == at)
608 {
609 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
610 return TRUE;
611 }
612 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
613 at != DW_AT_sibling)
614 {
615 abstract_abbrev_attr = abbrev_attr;
616 ai = i;
617 }
618 }
619 /* do we have an abstract origin debug entry to look into ? */
620 if (!abstract_abbrev_attr) break;
621 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
622 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
623 FIXME("Should have found the debug info entry\n");
624 }
625 return FALSE;
626 }
627
628 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
629 struct symt_compiland*);
630
631 #define Wine_DW_no_register 0x7FFFFFFF
632
633 static unsigned dwarf2_map_register(int regno)
634 {
635 if (regno == Wine_DW_no_register)
636 {
637 FIXME("What the heck map reg 0x%x\n",regno);
638 return 0;
639 }
640 return dbghelp_current_cpu->map_dwarf_register(regno);
641 }
642
643 static enum location_error
644 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
645 HANDLE hproc, const struct location* frame)
646 {
647 DWORD_PTR tmp, stack[64];
648 unsigned stk;
649 unsigned char op;
650 BOOL piece_found = FALSE;
651
652 stack[stk = 0] = 0;
653
654 loc->kind = loc_absolute;
655 loc->reg = Wine_DW_no_register;
656
657 while (ctx->data < ctx->end_data)
658 {
659 op = dwarf2_parse_byte(ctx);
660
661 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
662 stack[++stk] = op - DW_OP_lit0;
663 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
664 {
665 /* dbghelp APIs don't know how to cope with this anyway
666 * (for example 'long long' stored in two registers)
667 * FIXME: We should tell winedbg how to deal with it (sigh)
668 */
669 if (!piece_found)
670 {
671 if (loc->reg != Wine_DW_no_register)
672 FIXME("Only supporting one reg (%d -> %d)\n",
673 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
674 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
675 }
676 loc->kind = loc_register;
677 }
678 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
679 {
680 /* dbghelp APIs don't know how to cope with this anyway
681 * (for example 'long long' stored in two registers)
682 * FIXME: We should tell winedbg how to deal with it (sigh)
683 */
684 if (!piece_found)
685 {
686 if (loc->reg != Wine_DW_no_register)
687 FIXME("Only supporting one breg (%d -> %d)\n",
688 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
689 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
690 }
691 stack[++stk] = dwarf2_leb128_as_signed(ctx);
692 loc->kind = loc_regrel;
693 }
694 else switch (op)
695 {
696 case DW_OP_nop: break;
697 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
698 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
699 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
700 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
701 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
702 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
703 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
704 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
705 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
706 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
707 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
708 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
709 case DW_OP_drop: stk--; break;
710 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
711 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
712 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
713 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
714 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
715 case DW_OP_neg: stack[stk] = -stack[stk]; break;
716 case DW_OP_not: stack[stk] = ~stack[stk]; break;
717 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
718 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
719 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
720 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
721 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
722 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
723 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
724 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
725 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
726 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
727 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
728 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
729 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
730 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
731 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
732 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
733 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
734 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
735 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
736 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
737 case DW_OP_regx:
738 tmp = dwarf2_leb128_as_unsigned(ctx);
739 if (!piece_found)
740 {
741 if (loc->reg != Wine_DW_no_register)
742 FIXME("Only supporting one reg\n");
743 loc->reg = dwarf2_map_register(tmp);
744 }
745 loc->kind = loc_register;
746 break;
747 case DW_OP_bregx:
748 tmp = dwarf2_leb128_as_unsigned(ctx);
749 if (loc->reg != Wine_DW_no_register)
750 FIXME("Only supporting one regx\n");
751 loc->reg = dwarf2_map_register(tmp);
752 stack[++stk] = dwarf2_leb128_as_signed(ctx);
753 loc->kind = loc_regrel;
754 break;
755 case DW_OP_fbreg:
756 if (loc->reg != Wine_DW_no_register)
757 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
758 if (frame && frame->kind == loc_register)
759 {
760 loc->kind = loc_regrel;
761 loc->reg = frame->reg;
762 stack[++stk] = dwarf2_leb128_as_signed(ctx);
763 }
764 else if (frame && frame->kind == loc_regrel)
765 {
766 loc->kind = loc_regrel;
767 loc->reg = frame->reg;
768 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
769 }
770 else
771 {
772 /* FIXME: this could be later optimized by not recomputing
773 * this very location expression
774 */
775 loc->kind = loc_dwarf2_block;
776 stack[++stk] = dwarf2_leb128_as_signed(ctx);
777 }
778 break;
779 case DW_OP_piece:
780 {
781 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
782 WARN("Not handling OP_piece (size=%d)\n", sz);
783 piece_found = TRUE;
784 }
785 break;
786 case DW_OP_deref:
787 if (!stk)
788 {
789 FIXME("Unexpected empty stack\n");
790 return loc_err_internal;
791 }
792 if (loc->reg != Wine_DW_no_register)
793 {
794 WARN("Too complex expression for deref\n");
795 return loc_err_too_complex;
796 }
797 if (hproc)
798 {
799 DWORD_PTR addr = stack[stk--];
800 DWORD_PTR deref;
801
802 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
803 {
804 WARN("Couldn't read memory at %lx\n", addr);
805 return loc_err_cant_read;
806 }
807 stack[++stk] = deref;
808 }
809 else
810 {
811 loc->kind = loc_dwarf2_block;
812 }
813 break;
814 case DW_OP_deref_size:
815 if (!stk)
816 {
817 FIXME("Unexpected empty stack\n");
818 return loc_err_internal;
819 }
820 if (loc->reg != Wine_DW_no_register)
821 {
822 WARN("Too complex expression for deref\n");
823 return loc_err_too_complex;
824 }
825 if (hproc)
826 {
827 DWORD_PTR addr = stack[stk--];
828 BYTE derefsize = dwarf2_parse_byte(ctx);
829 DWORD64 deref;
830
831 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
832 {
833 WARN("Couldn't read memory at %lx\n", addr);
834 return loc_err_cant_read;
835 }
836
837 switch (derefsize)
838 {
839 case 1: stack[++stk] = *(unsigned char*)&deref; break;
840 case 2: stack[++stk] = *(unsigned short*)&deref; break;
841 case 4: stack[++stk] = *(DWORD*)&deref; break;
842 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
843 }
844 }
845 else
846 {
847 loc->kind = loc_dwarf2_block;
848 }
849 break;
850 default:
851 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
852 FIXME("Unhandled attr op: %x\n", op);
853 /* FIXME else unhandled extension */
854 return loc_err_internal;
855 }
856 }
857 loc->offset = stack[stk];
858 return 0;
859 }
860
861 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
862 const dwarf2_debug_info_t* di,
863 unsigned long dw,
864 struct location* loc,
865 const struct location* frame)
866 {
867 struct attribute xloc;
868
869 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
870
871 switch (xloc.form)
872 {
873 case DW_FORM_data1: case DW_FORM_data2:
874 case DW_FORM_udata: case DW_FORM_sdata:
875 loc->kind = loc_absolute;
876 loc->reg = 0;
877 loc->offset = xloc.u.uvalue;
878 return TRUE;
879 case DW_FORM_data4: case DW_FORM_data8:
880 loc->kind = loc_dwarf2_location_list;
881 loc->reg = Wine_DW_no_register;
882 loc->offset = xloc.u.uvalue;
883 return TRUE;
884 case DW_FORM_block:
885 case DW_FORM_block1:
886 case DW_FORM_block2:
887 case DW_FORM_block4:
888 break;
889 default: FIXME("Unsupported yet form %lx\n", xloc.form);
890 return FALSE;
891 }
892
893 /* assume we have a block form */
894
895 if (xloc.u.block.size)
896 {
897 dwarf2_traverse_context_t lctx;
898 enum location_error err;
899
900 lctx.data = xloc.u.block.ptr;
901 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
902 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
903
904 err = compute_location(&lctx, loc, NULL, frame);
905 if (err < 0)
906 {
907 loc->kind = loc_error;
908 loc->reg = err;
909 }
910 else if (loc->kind == loc_dwarf2_block)
911 {
912 unsigned* ptr = pool_alloc(&ctx->module->pool,
913 sizeof(unsigned) + xloc.u.block.size);
914 *ptr = xloc.u.block.size;
915 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
916 loc->offset = (unsigned long)ptr;
917 }
918 }
919 return TRUE;
920 }
921
922 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
923 const dwarf2_debug_info_t* di)
924 {
925 struct attribute attr;
926
927 if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
928 {
929 dwarf2_debug_info_t* type;
930
931 type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
932 if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
933 if (!type->symt)
934 {
935 /* load the debug info entity */
936 dwarf2_load_one_entry(ctx, type, NULL);
937 }
938 return type->symt;
939 }
940 return NULL;
941 }
942
943 /******************************************************************
944 * dwarf2_read_one_debug_info
945 *
946 * Loads into memory one debug info entry, and recursively its children (if any)
947 */
948 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
949 dwarf2_traverse_context_t* traverse,
950 dwarf2_debug_info_t** pdi)
951 {
952 const dwarf2_abbrev_entry_t*abbrev;
953 unsigned long entry_code;
954 unsigned long offset;
955 dwarf2_debug_info_t* di;
956 dwarf2_debug_info_t* child;
957 dwarf2_debug_info_t** where;
958 dwarf2_abbrev_entry_attr_t* attr;
959 unsigned i;
960 struct attribute sibling;
961
962 offset = traverse->data - ctx->sections[ctx->section].address;
963 entry_code = dwarf2_leb128_as_unsigned(traverse);
964 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
965 if (!entry_code)
966 {
967 *pdi = NULL;
968 return TRUE;
969 }
970 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
971 if (!abbrev)
972 {
973 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
974 return FALSE;
975 }
976 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
977 if (!di) return FALSE;
978 di->abbrev = abbrev;
979 di->symt = NULL;
980
981 if (abbrev->num_attr)
982 {
983 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
984 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
985 {
986 di->data[i] = traverse->data;
987 dwarf2_swallow_attribute(traverse, attr);
988 }
989 }
990 else di->data = NULL;
991 if (abbrev->have_child)
992 {
993 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
994 while (traverse->data < traverse->end_data)
995 {
996 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
997 if (!child) break;
998 where = vector_add(&di->children, &ctx->pool);
999 if (!where) return FALSE;
1000 *where = child;
1001 }
1002 }
1003 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1004 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1005 {
1006 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1007 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1008 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1009 }
1010 *pdi = di;
1011 return TRUE;
1012 }
1013
1014 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1015 dwarf2_debug_info_t* di)
1016 {
1017 struct attribute name;
1018 struct attribute size;
1019 struct attribute encoding;
1020 enum BasicType bt;
1021 int cache_idx = -1;
1022 if (di->symt) return di->symt;
1023
1024 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1025
1026 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1027 name.u.string = NULL;
1028 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1029 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1030
1031 switch (encoding.u.uvalue)
1032 {
1033 case DW_ATE_void: bt = btVoid; break;
1034 case DW_ATE_address: bt = btULong; break;
1035 case DW_ATE_boolean: bt = btBool; break;
1036 case DW_ATE_complex_float: bt = btComplex; break;
1037 case DW_ATE_float: bt = btFloat; break;
1038 case DW_ATE_signed: bt = btInt; break;
1039 case DW_ATE_unsigned: bt = btUInt; break;
1040 case DW_ATE_signed_char: bt = btChar; break;
1041 case DW_ATE_unsigned_char: bt = btChar; break;
1042 default: bt = btNoType; break;
1043 }
1044 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1045 switch (bt)
1046 {
1047 case btVoid:
1048 assert(size.u.uvalue == 0);
1049 cache_idx = sc_void;
1050 break;
1051 case btInt:
1052 switch (size.u.uvalue)
1053 {
1054 case 1: cache_idx = sc_int1; break;
1055 case 2: cache_idx = sc_int2; break;
1056 case 4: cache_idx = sc_int4; break;
1057 }
1058 break;
1059 default: break;
1060 }
1061 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1062 ctx->symt_cache[cache_idx] = di->symt;
1063
1064 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1065 return di->symt;
1066 }
1067
1068 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1069 dwarf2_debug_info_t* di)
1070 {
1071 struct symt* ref_type;
1072 struct attribute name;
1073
1074 if (di->symt) return di->symt;
1075
1076 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1077
1078 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1079 ref_type = dwarf2_lookup_type(ctx, di);
1080
1081 if (name.u.string)
1082 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1083 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1084 return di->symt;
1085 }
1086
1087 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1088 dwarf2_debug_info_t* di)
1089 {
1090 struct symt* ref_type;
1091 struct attribute size;
1092
1093 if (di->symt) return di->symt;
1094
1095 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1096
1097 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1098 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1099 {
1100 ref_type = ctx->symt_cache[sc_void];
1101 assert(ref_type);
1102 }
1103 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1104 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1105 return di->symt;
1106 }
1107
1108 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1109 dwarf2_debug_info_t* di)
1110 {
1111 struct symt* ref_type;
1112 struct symt* idx_type = NULL;
1113 struct attribute min, max, cnt;
1114 dwarf2_debug_info_t* child;
1115 unsigned int i;
1116
1117 if (di->symt) return di->symt;
1118
1119 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1120
1121 if (!di->abbrev->have_child)
1122 {
1123 FIXME("array without range information\n");
1124 return NULL;
1125 }
1126 ref_type = dwarf2_lookup_type(ctx, di);
1127
1128 for (i=0; i<vector_length(&di->children); i++)
1129 {
1130 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1131 switch (child->abbrev->tag)
1132 {
1133 case DW_TAG_subrange_type:
1134 idx_type = dwarf2_lookup_type(ctx, child);
1135 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1136 min.u.uvalue = 0;
1137 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1138 max.u.uvalue = 0;
1139 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1140 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1141 break;
1142 default:
1143 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1144 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1145 break;
1146 }
1147 }
1148 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1149 return di->symt;
1150 }
1151
1152 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1153 dwarf2_debug_info_t* di)
1154 {
1155 struct symt* ref_type;
1156
1157 if (di->symt) return di->symt;
1158
1159 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1160
1161 ref_type = dwarf2_lookup_type(ctx, di);
1162 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1163 di->symt = ref_type;
1164
1165 return ref_type;
1166 }
1167
1168 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1169 dwarf2_debug_info_t* di)
1170 {
1171 struct symt* ref_type;
1172
1173 if (di->symt) return di->symt;
1174
1175 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1176
1177 ref_type = dwarf2_lookup_type(ctx, di);
1178 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1179 di->symt = ref_type;
1180
1181 return ref_type;
1182 }
1183
1184 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1185 dwarf2_debug_info_t* di)
1186 {
1187 struct symt* ref_type = NULL;
1188
1189 if (di->symt) return di->symt;
1190
1191 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1192
1193 ref_type = dwarf2_lookup_type(ctx, di);
1194 /* FIXME: for now, we hard-wire C++ references to pointers */
1195 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1196
1197 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1198
1199 return di->symt;
1200 }
1201
1202 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1203 const dwarf2_debug_info_t* di,
1204 struct symt_udt* parent)
1205 {
1206 struct symt* elt_type;
1207 struct attribute name;
1208 struct attribute bit_size;
1209 struct attribute bit_offset;
1210 struct location loc;
1211
1212 assert(parent);
1213
1214 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1215
1216 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1217 elt_type = dwarf2_lookup_type(ctx, di);
1218 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1219 {
1220 if (loc.kind != loc_absolute)
1221 {
1222 FIXME("Found register, while not expecting it\n");
1223 loc.offset = 0;
1224 }
1225 else
1226 TRACE("found member_location at %s -> %lu\n",
1227 dwarf2_debug_ctx(ctx), loc.offset);
1228 }
1229 else
1230 loc.offset = 0;
1231 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1232 bit_size.u.uvalue = 0;
1233 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1234 {
1235 /* FIXME: we should only do this when implementation is LSB (which is
1236 * the case on i386 processors)
1237 */
1238 struct attribute nbytes;
1239 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1240 {
1241 DWORD64 size;
1242 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1243 (unsigned long)size : 0;
1244 }
1245 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1246 }
1247 else bit_offset.u.uvalue = 0;
1248 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1249 (loc.offset << 3) + bit_offset.u.uvalue,
1250 bit_size.u.uvalue);
1251
1252 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1253 }
1254
1255 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1256 dwarf2_debug_info_t* di,
1257 enum UdtKind udt)
1258 {
1259 struct attribute name;
1260 struct attribute size;
1261
1262 if (di->symt) return di->symt;
1263
1264 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1265
1266 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1267 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1268
1269 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1270
1271 if (di->abbrev->have_child) /** any interest to not have child ? */
1272 {
1273 dwarf2_debug_info_t* child;
1274 unsigned int i;
1275
1276 for (i=0; i<vector_length(&di->children); i++)
1277 {
1278 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1279
1280 switch (child->abbrev->tag)
1281 {
1282 case DW_TAG_member:
1283 /* FIXME: should I follow the sibling stuff ?? */
1284 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1285 break;
1286 case DW_TAG_enumeration_type:
1287 dwarf2_parse_enumeration_type(ctx, child);
1288 break;
1289 case DW_TAG_structure_type:
1290 case DW_TAG_class_type:
1291 case DW_TAG_union_type:
1292 case DW_TAG_typedef:
1293 /* FIXME: we need to handle nested udt definitions */
1294 case DW_TAG_inheritance:
1295 case DW_TAG_subprogram:
1296 case DW_TAG_variable:
1297 /* FIXME: some C++ related stuff */
1298 break;
1299 default:
1300 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1301 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1302 break;
1303 }
1304 }
1305 }
1306
1307 return di->symt;
1308 }
1309
1310 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1311 const dwarf2_debug_info_t* di,
1312 struct symt_enum* parent)
1313 {
1314 struct attribute name;
1315 struct attribute value;
1316
1317 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1318
1319 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1320 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1321 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1322
1323 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1324 }
1325
1326 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1327 dwarf2_debug_info_t* di)
1328 {
1329 struct attribute name;
1330 struct attribute size;
1331 struct symt_basic* basetype;
1332
1333 if (di->symt) return di->symt;
1334
1335 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1336
1337 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1338 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1339
1340 switch (size.u.uvalue) /* FIXME: that's wrong */
1341 {
1342 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1343 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1344 default:
1345 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1346 }
1347
1348 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1349
1350 if (di->abbrev->have_child) /* any interest to not have child ? */
1351 {
1352 dwarf2_debug_info_t* child;
1353 unsigned int i;
1354
1355 /* FIXME: should we use the sibling stuff ?? */
1356 for (i=0; i<vector_length(&di->children); i++)
1357 {
1358 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1359
1360 switch (child->abbrev->tag)
1361 {
1362 case DW_TAG_enumerator:
1363 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1364 break;
1365 default:
1366 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1367 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1368 }
1369 }
1370 }
1371 return di->symt;
1372 }
1373
1374 /* structure used to pass information around when parsing a subprogram */
1375 typedef struct dwarf2_subprogram_s
1376 {
1377 dwarf2_parse_context_t* ctx;
1378 struct symt_compiland* compiland;
1379 struct symt_function* func;
1380 BOOL non_computed_variable;
1381 struct location frame;
1382 } dwarf2_subprogram_t;
1383
1384 /******************************************************************
1385 * dwarf2_parse_variable
1386 *
1387 * Parses any variable (parameter, local/global variable)
1388 */
1389 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1390 struct symt_block* block,
1391 dwarf2_debug_info_t* di)
1392 {
1393 struct symt* param_type;
1394 struct attribute name, value;
1395 struct location loc;
1396 BOOL is_pmt;
1397
1398 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1399
1400 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1401 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1402
1403 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1404 /* cannot do much without the name, the functions below won't like it. */
1405 return;
1406 }
1407 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1408 &loc, &subpgm->frame))
1409 {
1410 struct attribute ext;
1411
1412 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1413 name.u.string, loc.kind, loc.offset, loc.reg,
1414 dwarf2_debug_ctx(subpgm->ctx));
1415
1416 switch (loc.kind)
1417 {
1418 case loc_error:
1419 break;
1420 case loc_absolute:
1421 /* it's a global variable */
1422 /* FIXME: we don't handle its scope yet */
1423 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1424 ext.u.uvalue = 0;
1425 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1426 name.u.string, !ext.u.uvalue,
1427 subpgm->ctx->load_offset + loc.offset,
1428 0, param_type);
1429 break;
1430 default:
1431 subpgm->non_computed_variable = TRUE;
1432 /* fall through */
1433 case loc_register:
1434 case loc_regrel:
1435 /* either a pmt/variable relative to frame pointer or
1436 * pmt/variable in a register
1437 */
1438 assert(subpgm->func);
1439 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1440 is_pmt ? DataIsParam : DataIsLocal,
1441 &loc, block, param_type, name.u.string);
1442 break;
1443 }
1444 }
1445 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1446 {
1447 VARIANT v;
1448 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1449 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1450 switch (value.form)
1451 {
1452 case DW_FORM_data1:
1453 case DW_FORM_data2:
1454 case DW_FORM_data4:
1455 case DW_FORM_udata:
1456 case DW_FORM_addr:
1457 v.n1.n2.vt = VT_UI4;
1458 v.n1.n2.n3.lVal = value.u.uvalue;
1459 break;
1460
1461 case DW_FORM_data8:
1462 v.n1.n2.vt = VT_UI8;
1463 v.n1.n2.n3.llVal = value.u.lluvalue;
1464 break;
1465
1466 case DW_FORM_sdata:
1467 v.n1.n2.vt = VT_I4;
1468 v.n1.n2.n3.lVal = value.u.svalue;
1469 break;
1470
1471 case DW_FORM_strp:
1472 case DW_FORM_string:
1473 /* FIXME: native doesn't report const strings from here !!
1474 * however, the value of the string is in the code somewhere
1475 */
1476 v.n1.n2.vt = VT_I1 | VT_BYREF;
1477 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1478 break;
1479
1480 case DW_FORM_block:
1481 case DW_FORM_block1:
1482 case DW_FORM_block2:
1483 case DW_FORM_block4:
1484 v.n1.n2.vt = VT_I4;
1485 switch (value.u.block.size)
1486 {
1487 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1488 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1489 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1490 default:
1491 v.n1.n2.vt = VT_I1 | VT_BYREF;
1492 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1493 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1494 }
1495 break;
1496
1497 default:
1498 FIXME("Unsupported form for const value %s (%lx)\n",
1499 name.u.string, value.form);
1500 v.n1.n2.vt = VT_EMPTY;
1501 }
1502 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1503 name.u.string, param_type, &v)->symt;
1504 }
1505 if (is_pmt && subpgm->func && subpgm->func->type)
1506 symt_add_function_signature_parameter(subpgm->ctx->module,
1507 (struct symt_function_signature*)subpgm->func->type,
1508 param_type);
1509
1510 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1511 }
1512
1513 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1514 const dwarf2_debug_info_t* di)
1515 {
1516 struct attribute name;
1517 struct attribute low_pc;
1518 struct location loc;
1519
1520 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1521
1522 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1523 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1524 name.u.string = NULL;
1525
1526 loc.kind = loc_absolute;
1527 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1528 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1529 &loc, name.u.string);
1530 }
1531
1532 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1533 struct symt_block* parent_block,
1534 const dwarf2_debug_info_t* di);
1535
1536 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1537 struct symt_block* parent_block,
1538 const dwarf2_debug_info_t* di)
1539 {
1540 struct symt_block* block;
1541 struct attribute low_pc;
1542 struct attribute high_pc;
1543
1544 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1545
1546 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1547 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1548
1549 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1550 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1551 high_pc.u.uvalue - low_pc.u.uvalue);
1552
1553 if (di->abbrev->have_child) /** any interest to not have child ? */
1554 {
1555 dwarf2_debug_info_t* child;
1556 unsigned int i;
1557
1558 for (i=0; i<vector_length(&di->children); i++)
1559 {
1560 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1561
1562 switch (child->abbrev->tag)
1563 {
1564 case DW_TAG_formal_parameter:
1565 case DW_TAG_variable:
1566 dwarf2_parse_variable(subpgm, block, child);
1567 break;
1568 case DW_TAG_lexical_block:
1569 dwarf2_parse_subprogram_block(subpgm, block, child);
1570 break;
1571 case DW_TAG_inlined_subroutine:
1572 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1573 break;
1574 case DW_TAG_label:
1575 dwarf2_parse_subprogram_label(subpgm, child);
1576 break;
1577 default:
1578 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1579 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1580 dwarf2_debug_di(di));
1581 }
1582 }
1583 }
1584 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1585 }
1586
1587 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1588 struct symt_block* parent_block,
1589 const dwarf2_debug_info_t* di)
1590 {
1591 struct symt_block* block;
1592 struct attribute low_pc;
1593 struct attribute high_pc;
1594
1595 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1596
1597 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc))
1598 low_pc.u.uvalue = 0;
1599 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc))
1600 high_pc.u.uvalue = 0;
1601
1602 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1603 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1604 high_pc.u.uvalue - low_pc.u.uvalue);
1605
1606 if (di->abbrev->have_child) /** any interest to not have child ? */
1607 {
1608 dwarf2_debug_info_t* child;
1609 unsigned int i;
1610
1611 for (i=0; i<vector_length(&di->children); i++)
1612 {
1613 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1614
1615 switch (child->abbrev->tag)
1616 {
1617 case DW_TAG_inlined_subroutine:
1618 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1619 break;
1620 case DW_TAG_variable:
1621 dwarf2_parse_variable(subpgm, block, child);
1622 break;
1623 case DW_TAG_lexical_block:
1624 dwarf2_parse_subprogram_block(subpgm, block, child);
1625 break;
1626 case DW_TAG_subprogram:
1627 /* FIXME: likely a declaration (to be checked)
1628 * skip it for now
1629 */
1630 break;
1631 case DW_TAG_formal_parameter:
1632 /* FIXME: likely elements for exception handling (GCC flavor)
1633 * Skip it for now
1634 */
1635 break;
1636 case DW_TAG_label:
1637 dwarf2_parse_subprogram_label(subpgm, child);
1638 break;
1639 case DW_TAG_class_type:
1640 case DW_TAG_structure_type:
1641 case DW_TAG_union_type:
1642 case DW_TAG_enumeration_type:
1643 case DW_TAG_typedef:
1644 /* the type referred to will be loaded when we need it, so skip it */
1645 break;
1646 default:
1647 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1648 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1649 }
1650 }
1651 }
1652
1653 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1654 }
1655
1656 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1657 dwarf2_debug_info_t* di,
1658 struct symt_compiland* compiland)
1659 {
1660 struct attribute name;
1661 struct attribute low_pc;
1662 struct attribute high_pc;
1663 struct attribute is_decl;
1664 struct attribute inline_flags;
1665 struct symt* ret_type;
1666 struct symt_function_signature* sig_type;
1667 dwarf2_subprogram_t subpgm;
1668
1669 if (di->symt) return di->symt;
1670
1671 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1672
1673 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1674 {
1675 WARN("No name for function... dropping function\n");
1676 return NULL;
1677 }
1678 /* if it's an abstract representation of an inline function, there should be
1679 * a concrete object that we'll handle
1680 */
1681 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1682 {
1683 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1684 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1685 return NULL;
1686 }
1687
1688 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1689 if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1690 /* As functions (defined as inline assembly) get debug info with dwarf
1691 * (not the case for stabs), we just drop Wine's thunks here...
1692 * Actual thunks will be created in elf_module from the symbol table
1693 */
1694 if (elf_is_in_thunk_area(ctx->load_offset + low_pc.u.uvalue,
1695 ctx->thunks) >= 0)
1696 return NULL;
1697 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1698 is_decl.u.uvalue = 0;
1699
1700 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1701 {
1702 ret_type = ctx->symt_cache[sc_void];
1703 assert(ret_type);
1704 }
1705
1706 /* FIXME: assuming C source code */
1707 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1708 if (!is_decl.u.uvalue)
1709 {
1710 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1711 ctx->load_offset + low_pc.u.uvalue,
1712 high_pc.u.uvalue - low_pc.u.uvalue,
1713 &sig_type->symt);
1714 di->symt = &subpgm.func->symt;
1715 }
1716 else subpgm.func = NULL;
1717
1718 subpgm.ctx = ctx;
1719 subpgm.compiland = compiland;
1720 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1721 &subpgm.frame, NULL))
1722 {
1723 /* on stack !! */
1724 subpgm.frame.kind = loc_regrel;
1725 subpgm.frame.reg = 0;
1726 subpgm.frame.offset = 0;
1727 }
1728 subpgm.non_computed_variable = FALSE;
1729
1730 if (di->abbrev->have_child) /** any interest to not have child ? */
1731 {
1732 dwarf2_debug_info_t* child;
1733 unsigned int i;
1734
1735 for (i=0; i<vector_length(&di->children); i++)
1736 {
1737 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1738
1739 switch (child->abbrev->tag)
1740 {
1741 case DW_TAG_variable:
1742 case DW_TAG_formal_parameter:
1743 dwarf2_parse_variable(&subpgm, NULL, child);
1744 break;
1745 case DW_TAG_lexical_block:
1746 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1747 break;
1748 case DW_TAG_inlined_subroutine:
1749 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1750 break;
1751 case DW_TAG_subprogram:
1752 /* FIXME: likely a declaration (to be checked)
1753 * skip it for now
1754 */
1755 break;
1756 case DW_TAG_label:
1757 dwarf2_parse_subprogram_label(&subpgm, child);
1758 break;
1759 case DW_TAG_class_type:
1760 case DW_TAG_structure_type:
1761 case DW_TAG_union_type:
1762 case DW_TAG_enumeration_type:
1763 case DW_TAG_typedef:
1764 /* the type referred to will be loaded when we need it, so skip it */
1765 break;
1766 case DW_TAG_unspecified_parameters:
1767 /* FIXME: no support in dbghelp's internals so far */
1768 break;
1769 default:
1770 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1771 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1772 }
1773 }
1774 }
1775
1776 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1777 {
1778 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1779 &subpgm.frame, NULL);
1780 }
1781 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1782
1783 return di->symt;
1784 }
1785
1786 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1787 dwarf2_debug_info_t* di)
1788 {
1789 struct symt* ret_type;
1790 struct symt_function_signature* sig_type;
1791
1792 if (di->symt) return di->symt;
1793
1794 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1795
1796 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1797 {
1798 ret_type = ctx->symt_cache[sc_void];
1799 assert(ret_type);
1800 }
1801
1802 /* FIXME: assuming C source code */
1803 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1804
1805 if (di->abbrev->have_child) /** any interest to not have child ? */
1806 {
1807 dwarf2_debug_info_t* child;
1808 unsigned int i;
1809
1810 for (i=0; i<vector_length(&di->children); i++)
1811 {
1812 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1813
1814 switch (child->abbrev->tag)
1815 {
1816 case DW_TAG_formal_parameter:
1817 symt_add_function_signature_parameter(ctx->module, sig_type,
1818 dwarf2_lookup_type(ctx, child));
1819 break;
1820 case DW_TAG_unspecified_parameters:
1821 WARN("Unsupported unspecified parameters\n");
1822 break;
1823 }
1824 }
1825 }
1826
1827 return di->symt = &sig_type->symt;
1828 }
1829
1830 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1831 dwarf2_debug_info_t* di,
1832 struct symt_compiland* compiland)
1833 {
1834 switch (di->abbrev->tag)
1835 {
1836 case DW_TAG_typedef:
1837 dwarf2_parse_typedef(ctx, di);
1838 break;
1839 case DW_TAG_base_type:
1840 dwarf2_parse_base_type(ctx, di);
1841 break;
1842 case DW_TAG_pointer_type:
1843 dwarf2_parse_pointer_type(ctx, di);
1844 break;
1845 case DW_TAG_class_type:
1846 dwarf2_parse_udt_type(ctx, di, UdtClass);
1847 break;
1848 case DW_TAG_structure_type:
1849 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1850 break;
1851 case DW_TAG_union_type:
1852 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1853 break;
1854 case DW_TAG_array_type:
1855 dwarf2_parse_array_type(ctx, di);
1856 break;
1857 case DW_TAG_const_type:
1858 dwarf2_parse_const_type(ctx, di);
1859 break;
1860 case DW_TAG_volatile_type:
1861 dwarf2_parse_volatile_type(ctx, di);
1862 break;
1863 case DW_TAG_reference_type:
1864 dwarf2_parse_reference_type(ctx, di);
1865 break;
1866 case DW_TAG_enumeration_type:
1867 dwarf2_parse_enumeration_type(ctx, di);
1868 break;
1869 case DW_TAG_subprogram:
1870 dwarf2_parse_subprogram(ctx, di, compiland);
1871 break;
1872 case DW_TAG_subroutine_type:
1873 dwarf2_parse_subroutine_type(ctx, di);
1874 break;
1875 case DW_TAG_variable:
1876 {
1877 dwarf2_subprogram_t subpgm;
1878
1879 subpgm.ctx = ctx;
1880 subpgm.compiland = compiland;
1881 subpgm.func = NULL;
1882 subpgm.frame.kind = loc_absolute;
1883 subpgm.frame.offset = 0;
1884 subpgm.frame.reg = Wine_DW_no_register;
1885 dwarf2_parse_variable(&subpgm, NULL, di);
1886 }
1887 break;
1888 /* silence a couple of C++ defines */
1889 case DW_TAG_namespace:
1890 case DW_TAG_imported_module:
1891 case DW_TAG_imported_declaration:
1892 break;
1893 default:
1894 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1895 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1896 }
1897 }
1898
1899 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1900 const struct vector* v, unsigned file, unsigned line)
1901 {
1902 struct symt_function* func;
1903 struct symt_ht* symt;
1904 unsigned* psrc;
1905
1906 if (!file || !(psrc = vector_at(v, file - 1))) return;
1907
1908 TRACE("%s %lx %s %u\n",
1909 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
1910 if (!(symt = symt_find_nearest(module, address)) ||
1911 symt->symt.tag != SymTagFunction) return;
1912 func = (struct symt_function*)symt;
1913 symt_add_func_line(module, func, *psrc, line, address - func->address);
1914 }
1915
1916 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
1917 dwarf2_parse_context_t* ctx,
1918 const char* compile_dir,
1919 unsigned long offset)
1920 {
1921 dwarf2_traverse_context_t traverse;
1922 unsigned long length;
1923 unsigned version, header_len, insn_size, default_stmt;
1924 unsigned line_range, opcode_base;
1925 int line_base;
1926 const unsigned char* opcode_len;
1927 struct vector dirs;
1928 struct vector files;
1929 const char** p;
1930
1931 /* section with line numbers stripped */
1932 if (sections[section_line].address == IMAGE_NO_MAP)
1933 return FALSE;
1934
1935 traverse.data = sections[section_line].address + offset;
1936 traverse.end_data = traverse.data + 4;
1937 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1938
1939 length = dwarf2_parse_u4(&traverse);
1940 traverse.end_data = sections[section_line].address + offset + length;
1941
1942 version = dwarf2_parse_u2(&traverse);
1943 header_len = dwarf2_parse_u4(&traverse);
1944 insn_size = dwarf2_parse_byte(&traverse);
1945 default_stmt = dwarf2_parse_byte(&traverse);
1946 line_base = (signed char)dwarf2_parse_byte(&traverse);
1947 line_range = dwarf2_parse_byte(&traverse);
1948 opcode_base = dwarf2_parse_byte(&traverse);
1949
1950 opcode_len = traverse.data;
1951 traverse.data += opcode_base - 1;
1952
1953 vector_init(&dirs, sizeof(const char*), 4);
1954 p = vector_add(&dirs, &ctx->pool);
1955 *p = compile_dir ? compile_dir : ".";
1956 while (*traverse.data)
1957 {
1958 const char* rel = (const char*)traverse.data;
1959 unsigned rellen = strlen(rel);
1960 TRACE("Got include %s\n", rel);
1961 traverse.data += rellen + 1;
1962 p = vector_add(&dirs, &ctx->pool);
1963
1964 if (*rel == '/' || !compile_dir)
1965 *p = rel;
1966 else
1967 {
1968 /* include directory relative to compile directory */
1969 unsigned baselen = strlen(compile_dir);
1970 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
1971 strcpy(tmp, compile_dir);
1972 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
1973 strcpy(&tmp[baselen], rel);
1974 *p = tmp;
1975 }
1976
1977 }
1978 traverse.data++;
1979
1980 vector_init(&files, sizeof(unsigned), 16);
1981 while (*traverse.data)
1982 {
1983 unsigned int dir_index, mod_time, length;
1984 const char* name;
1985 const char* dir;
1986 unsigned* psrc;
1987
1988 name = (const char*)traverse.data;
1989 traverse.data += strlen(name) + 1;
1990 dir_index = dwarf2_leb128_as_unsigned(&traverse);
1991 mod_time = dwarf2_leb128_as_unsigned(&traverse);
1992 length = dwarf2_leb128_as_unsigned(&traverse);
1993 dir = *(const char**)vector_at(&dirs, dir_index);
1994 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
1995 psrc = vector_add(&files, &ctx->pool);
1996 *psrc = source_new(ctx->module, dir, name);
1997 }
1998 traverse.data++;
1999
2000 while (traverse.data < traverse.end_data)
2001 {
2002 unsigned long address = 0;
2003 unsigned file = 1;
2004 unsigned line = 1;
2005 unsigned is_stmt = default_stmt;
2006 BOOL basic_block = FALSE, end_sequence = FALSE;
2007 unsigned opcode, extopcode, i;
2008
2009 while (!end_sequence)
2010 {
2011 opcode = dwarf2_parse_byte(&traverse);
2012 TRACE("Got opcode %x\n", opcode);
2013
2014 if (opcode >= opcode_base)
2015 {
2016 unsigned delta = opcode - opcode_base;
2017
2018 address += (delta / line_range) * insn_size;
2019 line += line_base + (delta % line_range);
2020 basic_block = TRUE;
2021 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2022 }
2023 else
2024 {
2025 switch (opcode)
2026 {
2027 case DW_LNS_copy:
2028 basic_block = FALSE;
2029 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2030 break;
2031 case DW_LNS_advance_pc:
2032 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2033 break;
2034 case DW_LNS_advance_line:
2035 line += dwarf2_leb128_as_signed(&traverse);
2036 break;
2037 case DW_LNS_set_file:
2038 file = dwarf2_leb128_as_unsigned(&traverse);
2039 break;
2040 case DW_LNS_set_column:
2041 dwarf2_leb128_as_unsigned(&traverse);
2042 break;
2043 case DW_LNS_negate_stmt:
2044 is_stmt = !is_stmt;
2045 break;
2046 case DW_LNS_set_basic_block:
2047 basic_block = 1;
2048 break;
2049 case DW_LNS_const_add_pc:
2050 address += ((255 - opcode_base) / line_range) * insn_size;
2051 break;
2052 case DW_LNS_fixed_advance_pc:
2053 address += dwarf2_parse_u2(&traverse);
2054 break;
2055 case DW_LNS_extended_op:
2056 dwarf2_leb128_as_unsigned(&traverse);
2057 extopcode = dwarf2_parse_byte(&traverse);
2058 switch (extopcode)
2059 {
2060 case DW_LNE_end_sequence:
2061 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2062 end_sequence = TRUE;
2063 break;
2064 case DW_LNE_set_address:
2065 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2066 break;
2067 case DW_LNE_define_file:
2068 FIXME("not handled %s\n", traverse.data);
2069 traverse.data += strlen((const char *)traverse.data) + 1;
2070 dwarf2_leb128_as_unsigned(&traverse);
2071 dwarf2_leb128_as_unsigned(&traverse);
2072 dwarf2_leb128_as_unsigned(&traverse);
2073 break;
2074 default:
2075 FIXME("Unsupported extended opcode %x\n", extopcode);
2076 break;
2077 }
2078 break;
2079 default:
2080 WARN("Unsupported opcode %x\n", opcode);
2081 for (i = 0; i < opcode_len[opcode]; i++)
2082 dwarf2_leb128_as_unsigned(&traverse);
2083 break;
2084 }
2085 }
2086 }
2087 }
2088 return TRUE;
2089 }
2090
2091 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2092 struct module* module,
2093 const struct elf_thunk_area* thunks,
2094 dwarf2_traverse_context_t* mod_ctx,
2095 unsigned long load_offset)
2096 {
2097 dwarf2_parse_context_t ctx;
2098 dwarf2_traverse_context_t abbrev_ctx;
2099 dwarf2_debug_info_t* di;
2100 dwarf2_traverse_context_t cu_ctx;
2101 const unsigned char* comp_unit_start = mod_ctx->data;
2102 unsigned long cu_length;
2103 unsigned short cu_version;
2104 unsigned long cu_abbrev_offset;
2105 BOOL ret = FALSE;
2106
2107 cu_length = dwarf2_parse_u4(mod_ctx);
2108 cu_ctx.data = mod_ctx->data;
2109 cu_ctx.end_data = mod_ctx->data + cu_length;
2110 mod_ctx->data += cu_length;
2111 cu_version = dwarf2_parse_u2(&cu_ctx);
2112 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2113 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2114
2115 TRACE("Compilation Unit Header found at 0x%x:\n",
2116 (int)(comp_unit_start - sections[section_debug].address));
2117 TRACE("- length: %lu\n", cu_length);
2118 TRACE("- version: %u\n", cu_version);
2119 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2120 TRACE("- word_size: %u\n", cu_ctx.word_size);
2121
2122 if (cu_version != 2)
2123 {
2124 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2125 cu_version);
2126 return FALSE;
2127 }
2128
2129 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2130 mod_ctx->word_size = cu_ctx.word_size;
2131
2132 pool_init(&ctx.pool, 65536);
2133 ctx.sections = sections;
2134 ctx.section = section_debug;
2135 ctx.module = module;
2136 ctx.thunks = thunks;
2137 ctx.load_offset = load_offset;
2138 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2139 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2140 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2141
2142 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2143 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2144 abbrev_ctx.word_size = cu_ctx.word_size;
2145 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2146
2147 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2148 dwarf2_read_one_debug_info(&ctx, &cu_ctx, &di);
2149
2150 if (di->abbrev->tag == DW_TAG_compile_unit)
2151 {
2152 struct attribute name;
2153 dwarf2_debug_info_t** pdi = NULL;
2154 struct attribute stmt_list, low_pc;
2155 struct attribute comp_dir;
2156
2157 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2158 name.u.string = NULL;
2159
2160 /* get working directory of current compilation unit */
2161 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2162 comp_dir.u.string = NULL;
2163
2164 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2165 low_pc.u.uvalue = 0;
2166 di->symt = &symt_new_compiland(module,
2167 ctx.load_offset + low_pc.u.uvalue,
2168 source_new(module, comp_dir.u.string, name.u.string))->symt;
2169
2170 if (di->abbrev->have_child)
2171 {
2172 unsigned int i;
2173 for (i=0; i<vector_length(&di->children); i++)
2174 {
2175 pdi = vector_at(&di->children, i);
2176 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2177 }
2178 }
2179 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2180 {
2181 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2182 module->module.LineNumbers = TRUE;
2183 }
2184 ret = TRUE;
2185 }
2186 else FIXME("Should have a compilation unit here\n");
2187 pool_destroy(&ctx.pool);
2188 return ret;
2189 }
2190
2191 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2192 unsigned long ip, dwarf2_traverse_context_t* lctx)
2193 {
2194 DWORD_PTR beg, end;
2195 const BYTE* ptr = start;
2196 DWORD len;
2197
2198 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2199 {
2200 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2201 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2202 if (!beg && !end) break;
2203 len = dwarf2_get_u2(ptr); ptr += 2;
2204
2205 if (beg <= ip && ip < end)
2206 {
2207 lctx->data = ptr;
2208 lctx->end_data = ptr + len;
2209 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2210 return TRUE;
2211 }
2212 ptr += len;
2213 }
2214 WARN("Couldn't find ip in location list\n");
2215 return FALSE;
2216 }
2217
2218 static enum location_error loc_compute_frame(struct process* pcs,
2219 const struct module_format* modfmt,
2220 const struct symt_function* func,
2221 DWORD_PTR ip, struct location* frame)
2222 {
2223 struct symt** psym = NULL;
2224 struct location* pframe;
2225 dwarf2_traverse_context_t lctx;
2226 enum location_error err;
2227 unsigned int i;
2228
2229 for (i=0; i<vector_length(&func->vchildren); i++)
2230 {
2231 psym = vector_at(&func->vchildren, i);
2232 if ((*psym)->tag == SymTagCustom)
2233 {
2234 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2235
2236 /* First, recompute the frame information, if needed */
2237 switch (pframe->kind)
2238 {
2239 case loc_regrel:
2240 case loc_register:
2241 *frame = *pframe;
2242 break;
2243 case loc_dwarf2_location_list:
2244 WARN("Searching loclist for %s\n", func->hash_elt.name);
2245 if (!dwarf2_lookup_loclist(modfmt,
2246 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2247 ip, &lctx))
2248 return loc_err_out_of_scope;
2249 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2250 if (frame->kind >= loc_user)
2251 {
2252 WARN("Couldn't compute runtime frame location\n");
2253 return loc_err_too_complex;
2254 }
2255 break;
2256 default:
2257 WARN("Unsupported frame kind %d\n", pframe->kind);
2258 return loc_err_internal;
2259 }
2260 return 0;
2261 }
2262 }
2263 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2264 return loc_err_internal;
2265 }
2266
2267 enum reg_rule
2268 {
2269 RULE_UNSET, /* not set at all */
2270 RULE_UNDEFINED, /* undefined value */
2271 RULE_SAME, /* same value as previous frame */
2272 RULE_CFA_OFFSET, /* stored at cfa offset */
2273 RULE_OTHER_REG, /* stored in other register */
2274 RULE_EXPRESSION, /* address specified by expression */
2275 RULE_VAL_EXPRESSION /* value specified by expression */
2276 };
2277
2278 /* make it large enough for all CPUs */
2279 #define NB_FRAME_REGS 64
2280
2281 struct frame_info
2282 {
2283 ULONG_PTR ip;
2284 ULONG_PTR code_align;
2285 LONG_PTR data_align;
2286 ULONG_PTR cfa_offset;
2287 enum reg_rule cfa_rule;
2288 unsigned char cfa_reg;
2289 unsigned char retaddr_reg;
2290 unsigned char fde_encoding;
2291 unsigned char lsda_encoding;
2292 unsigned char signal_frame;
2293 unsigned char aug_z_format;
2294 enum reg_rule rules[NB_FRAME_REGS];
2295 ULONG_PTR regs[NB_FRAME_REGS];
2296 };
2297
2298 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2299 {
2300 ULONG_PTR base;
2301
2302 if (encoding == DW_EH_PE_omit) return 0;
2303
2304 switch (encoding & 0xf0)
2305 {
2306 case DW_EH_PE_abs:
2307 base = 0;
2308 break;
2309 case DW_EH_PE_pcrel:
2310 base = (ULONG_PTR)ctx->data;
2311 break;
2312 default:
2313 FIXME("unsupported encoding %02x\n", encoding);
2314 return 0;
2315 }
2316
2317 switch (encoding & 0x0f)
2318 {
2319 case DW_EH_PE_native:
2320 return base + dwarf2_parse_addr(ctx);
2321 case DW_EH_PE_leb128:
2322 return base + dwarf2_leb128_as_unsigned(ctx);
2323 case DW_EH_PE_data2:
2324 return base + dwarf2_parse_u2(ctx);
2325 case DW_EH_PE_data4:
2326 return base + dwarf2_parse_u4(ctx);
2327 case DW_EH_PE_data8:
2328 return base + dwarf2_parse_u8(ctx);
2329 case DW_EH_PE_signed|DW_EH_PE_leb128:
2330 return base + dwarf2_leb128_as_signed(ctx);
2331 case DW_EH_PE_signed|DW_EH_PE_data2:
2332 return base + (signed short)dwarf2_parse_u2(ctx);
2333 case DW_EH_PE_signed|DW_EH_PE_data4:
2334 return base + (signed int)dwarf2_parse_u4(ctx);
2335 case DW_EH_PE_signed|DW_EH_PE_data8:
2336 return base + (LONG64)dwarf2_parse_u8(ctx);
2337 default:
2338 FIXME("unsupported encoding %02x\n", encoding);
2339 return 0;
2340 }
2341 }
2342
2343 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2344 {
2345 unsigned char version;
2346 const char* augmentation;
2347 const unsigned char* end;
2348 ULONG_PTR len;
2349
2350 memset(info, 0, sizeof(*info));
2351 info->lsda_encoding = DW_EH_PE_omit;
2352 info->aug_z_format = 0;
2353
2354 /* parse the CIE first */
2355 version = dwarf2_parse_byte(ctx);
2356 if (version != 1)
2357 {
2358 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2359 return FALSE;
2360 }
2361 augmentation = (const char*)ctx->data;
2362 ctx->data += strlen(augmentation) + 1;
2363
2364 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2365 info->data_align = dwarf2_leb128_as_signed(ctx);
2366 info->retaddr_reg = dwarf2_parse_byte(ctx);
2367 info->cfa_rule = RULE_CFA_OFFSET;
2368
2369 end = NULL;
2370 TRACE("\tparsing augmentation %s\n", augmentation);
2371 if (*augmentation) do
2372 {
2373 switch (*augmentation)
2374 {
2375 case 'z':
2376 len = dwarf2_leb128_as_unsigned(ctx);
2377 end = ctx->data + len;
2378 info->aug_z_format = 1;
2379 continue;
2380 case 'L':
2381 info->lsda_encoding = dwarf2_parse_byte(ctx);
2382 continue;
2383 case 'P':
2384 {
2385 unsigned char encoding = dwarf2_parse_byte(ctx);
2386 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2387 continue;
2388 }
2389 case 'R':
2390 info->fde_encoding = dwarf2_parse_byte(ctx);
2391 continue;
2392 case 'S':
2393 info->signal_frame = 1;
2394 continue;
2395 }
2396 FIXME("unknown augmentation '%c'\n", *augmentation);
2397 if (!end) return FALSE;
2398 break;
2399 } while (*++augmentation);
2400 if (end) ctx->data = end;
2401 return TRUE;
2402 }
2403
2404 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2405 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2406 struct frame_info* info)
2407 {
2408 const unsigned char* ptr_blk;
2409 const unsigned char* cie_ptr;
2410 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2411 unsigned len, id;
2412 unsigned long start, range;
2413
2414 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2415 {
2416 /* find the FDE for address addr (skip CIE) */
2417 len = dwarf2_parse_u4(fde_ctx);
2418 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2419 ptr_blk = fde_ctx->data + len;
2420 id = dwarf2_parse_u4(fde_ctx);
2421 if (id == 0) /* FIXME DW_CIE_ID */
2422 {
2423 last_cie_ptr = fde_ctx->data - 8;
2424 /* we need some bits out of the CIE in order to parse all contents */
2425 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2426 cie_ctx->data = fde_ctx->data;
2427 cie_ctx->end_data = ptr_blk;
2428 cie_ctx->word_size = fde_ctx->word_size;
2429 continue;
2430 }
2431 cie_ptr = fde_ctx->data - id - 4;
2432 if (cie_ptr != last_cie_ptr)
2433 {
2434 last_cie_ptr = cie_ptr;
2435 cie_ctx->data = cie_ptr;
2436 cie_ctx->word_size = fde_ctx->word_size;
2437 cie_ctx->end_data = cie_ptr + 4;
2438 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2439 if (dwarf2_parse_u4(cie_ctx) != 0) /* FIXME DW_CIE_ID */
2440 {
2441 FIXME("wrong CIE pointer\n");
2442 return FALSE;
2443 }
2444 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2445 }
2446 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2447 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2448
2449 if (addr >= start && addr < start + range)
2450 {
2451 /* reset the FDE context */
2452 fde_ctx->end_data = ptr_blk;
2453
2454 info->ip = start;
2455 return TRUE;
2456 }
2457 }
2458 return FALSE;
2459 }
2460
2461 static int valid_reg(ULONG_PTR reg)
2462 {
2463 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2464 return (reg < NB_FRAME_REGS);
2465 }
2466
2467 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2468 ULONG_PTR last_ip, struct frame_info *info)
2469 {
2470 while (ctx->data < ctx->end_data && info->ip < last_ip + info->signal_frame)
2471 {
2472 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2473
2474 if (op & 0xc0)
2475 {
2476 switch (op & 0xc0)
2477 {
2478 case DW_CFA_advance_loc:
2479 {
2480 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2481 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2482 info->ip += offset;
2483 break;
2484 }
2485 case DW_CFA_offset:
2486 {
2487 ULONG_PTR reg = op & 0x3f;
2488 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2489 if (!valid_reg(reg)) break;
2490 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2491 info->ip,
2492 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2493 offset);
2494 info->regs[reg] = offset;
2495 info->rules[reg] = RULE_CFA_OFFSET;
2496 break;
2497 }
2498 case DW_CFA_restore:
2499 {
2500 ULONG_PTR reg = op & 0x3f;
2501 if (!valid_reg(reg)) break;
2502 TRACE("%lx: DW_CFA_restore %s\n",
2503 info->ip,
2504 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2505 info->rules[reg] = RULE_UNSET;
2506 break;
2507 }
2508 }
2509 }
2510 else switch (op)
2511 {
2512 case DW_CFA_nop:
2513 break;
2514 case DW_CFA_set_loc:
2515 {
2516 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2517 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2518 info->ip = loc;
2519 break;
2520 }
2521 case DW_CFA_advance_loc1:
2522 {
2523 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2524 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2525 info->ip += offset;
2526 break;
2527 }
2528 case DW_CFA_advance_loc2:
2529 {
2530 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2531 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2532 info->ip += offset;
2533 break;
2534 }
2535 case DW_CFA_advance_loc4:
2536 {
2537 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2538 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2539 info->ip += offset;
2540 break;
2541 }
2542 case DW_CFA_offset_extended:
2543 case DW_CFA_offset_extended_sf:
2544 {
2545 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2546 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2547 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2548 if (!valid_reg(reg)) break;
2549 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2550 info->ip,
2551 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2552 offset);
2553 info->regs[reg] = offset;
2554 info->rules[reg] = RULE_CFA_OFFSET;
2555 break;
2556 }
2557 case DW_CFA_restore_extended:
2558 {
2559 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2560 if (!valid_reg(reg)) break;
2561 TRACE("%lx: DW_CFA_restore_extended %s\n",
2562 info->ip,
2563 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2564 info->rules[reg] = RULE_UNSET;
2565 break;
2566 }
2567 case DW_CFA_undefined:
2568 {
2569 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2570 if (!valid_reg(reg)) break;
2571 TRACE("%lx: DW_CFA_undefined %s\n",
2572 info->ip,
2573 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2574 info->rules[reg] = RULE_UNDEFINED;
2575 break;
2576 }
2577 case DW_CFA_same_value:
2578 {
2579 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2580 if (!valid_reg(reg)) break;
2581 TRACE("%lx: DW_CFA_same_value %s\n",
2582 info->ip,
2583 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2584 info->regs[reg] = reg;
2585 info->rules[reg] = RULE_SAME;
2586 break;
2587 }
2588 case DW_CFA_register:
2589 {
2590 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2591 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2592 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2593 TRACE("%lx: DW_CFA_register %s == %s\n",
2594 info->ip,
2595 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2596 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2)));
2597 info->regs[reg] = reg2;
2598 info->rules[reg] = RULE_OTHER_REG;
2599 break;
2600 }
2601 case DW_CFA_remember_state:
2602 FIXME("%lx: DW_CFA_remember_state not implemented\n", info->ip);
2603 break;
2604 case DW_CFA_restore_state:
2605 FIXME("%lx: DW_CFA_restore_state not implemented\n", info->ip);
2606 break;
2607 case DW_CFA_def_cfa:
2608 case DW_CFA_def_cfa_sf:
2609 {
2610 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2611 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2612 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2613 if (!valid_reg(reg)) break;
2614 TRACE("%lx: DW_CFA_def_cfa %s, %lu\n",
2615 info->ip,
2616 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2617 offset);
2618 info->cfa_reg = reg;
2619 info->cfa_offset = offset;
2620 info->cfa_rule = RULE_CFA_OFFSET;
2621 break;
2622 }
2623 case DW_CFA_def_cfa_register:
2624 {
2625 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2626 if (!valid_reg(reg)) break;
2627 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2628 info->ip,
2629 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2630 info->cfa_reg = reg;
2631 info->cfa_rule = RULE_CFA_OFFSET;
2632 break;
2633 }
2634 case DW_CFA_def_cfa_offset:
2635 case DW_CFA_def_cfa_offset_sf:
2636 {
2637 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2638 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2639 TRACE("%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset);
2640 info->cfa_offset = offset;
2641 info->cfa_rule = RULE_CFA_OFFSET;
2642 break;
2643 }
2644 case DW_CFA_def_cfa_expression:
2645 {
2646 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2647 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2648 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2649 info->cfa_offset = expr;
2650 info->cfa_rule = RULE_VAL_EXPRESSION;
2651 ctx->data += len;
2652 break;
2653 }
2654 case DW_CFA_expression:
2655 case DW_CFA_val_expression:
2656 {
2657 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2658 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2659 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2660 if (!valid_reg(reg)) break;
2661 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2662 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2663 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2664 expr, expr + len);
2665 info->regs[reg] = expr;
2666 info->rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
2667 ctx->data += len;
2668 break;
2669 }
2670 default:
2671 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
2672 break;
2673 }
2674 }
2675 }
2676
2677 /* retrieve a context register from its dwarf number */
2678 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
2679 {
2680 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2681 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2682
2683 if (sz != sizeof(ULONG_PTR))
2684 {
2685 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2686 return 0;
2687 }
2688 return *ptr;
2689 }
2690
2691 /* set a context register from its dwarf number */
2692 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
2693 ULONG_PTR val, BOOL isdebuggee)
2694 {
2695 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2696 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2697
2698 if (isdebuggee)
2699 {
2700 char tmp[16];
2701
2702 if (sz > sizeof(tmp))
2703 {
2704 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
2705 return;
2706 }
2707 if (!sw_read_mem(csw, val, tmp, sz))
2708 {
2709 WARN("Couldn't read memory at %p\n", (void*)val);
2710 return;
2711 }
2712 memcpy(ptr, tmp, sz);
2713 }
2714 else
2715 {
2716 if (sz != sizeof(ULONG_PTR))
2717 {
2718 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2719 return;
2720 }
2721 *ptr = val;
2722 }
2723 }
2724
2725 /* copy a register from one context to another using dwarf number */
2726 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
2727 {
2728 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst), szdst;
2729 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc), szsrc;
2730 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
2731 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
2732
2733 if (szdst != szsrc)
2734 {
2735 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
2736 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
2737 return;
2738 }
2739 memcpy(ptrdst, ptrsrc, szdst);
2740 }
2741
2742 static ULONG_PTR eval_expression(struct cpu_stack_walk* csw, const unsigned char* zp, CONTEXT *context)
2743 {
2744 dwarf2_traverse_context_t ctx;
2745 ULONG_PTR reg, sz, tmp, stack[64];
2746 int sp = -1;
2747 ULONG_PTR len;
2748
2749 ctx.data = zp;
2750 ctx.end_data = zp + 4;
2751 len = dwarf2_leb128_as_unsigned(&ctx);
2752 ctx.end_data = ctx.data + len;
2753 ctx.word_size = 8; /* FIXME: wordsize!! */
2754
2755 while (ctx.data < ctx.end_data)
2756 {
2757 unsigned char opcode = dwarf2_parse_byte(&ctx);
2758
2759 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
2760 stack[++sp] = opcode - DW_OP_lit0;
2761 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
2762 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
2763 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
2764 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
2765 else switch (opcode)
2766 {
2767 case DW_OP_nop: break;
2768 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
2769 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
2770 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
2771 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
2772 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
2773 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
2774 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
2775 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
2776 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
2777 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
2778 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
2779 case DW_OP_deref:
2780 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
2781 {
2782 ERR("Couldn't read memory at %lx\n", stack[sp]);
2783 tmp = 0;
2784 }
2785 stack[sp] = tmp;
2786 break;
2787 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
2788 case DW_OP_drop: sp--; break;
2789 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
2790 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
2791 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
2792 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
2793 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
2794 case DW_OP_neg: stack[sp] = -stack[sp]; break;
2795 case DW_OP_not: stack[sp] = ~stack[sp]; break;
2796 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
2797 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
2798 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
2799 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
2800 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
2801 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
2802 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
2803 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
2804 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
2805 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
2806 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
2807 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
2808 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
2809 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
2810 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
2811 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
2812 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
2813 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
2814 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
2815 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
2816 case DW_OP_GNU_encoded_addr:
2817 tmp = dwarf2_parse_byte(&ctx);
2818 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
2819 break;
2820 case DW_OP_regx:
2821 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
2822 break;
2823 case DW_OP_bregx:
2824 reg = dwarf2_leb128_as_unsigned(&ctx);
2825 tmp = dwarf2_leb128_as_signed(&ctx);
2826 stack[++sp] = get_context_reg(context, reg) + tmp;
2827 break;
2828 case DW_OP_deref_size:
2829 sz = dwarf2_parse_byte(&ctx);
2830 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
2831 {
2832 ERR("Couldn't read memory at %lx\n", stack[sp]);
2833 tmp = 0;
2834 }
2835 /* do integral promotion */
2836 switch (sz)
2837 {
2838 case 1: stack[sp] = *(unsigned char*)&tmp; break;
2839 case 2: stack[sp] = *(unsigned short*)&tmp; break;
2840 case 4: stack[sp] = *(unsigned int*)&tmp; break;
2841 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
2842 default: FIXME("Unknown size for deref 0x%lx\n", sz);
2843 }
2844 break;
2845 default:
2846 FIXME("unhandled opcode %02x\n", opcode);
2847 }
2848 }
2849 return stack[sp];
2850 }
2851
2852 static void apply_frame_info(struct cpu_stack_walk* csw, CONTEXT *context, struct frame_info *info, ULONG_PTR* cfa)
2853 {
2854 unsigned int i;
2855 ULONG_PTR value;
2856 CONTEXT new_context = *context;
2857
2858 switch (info->cfa_rule)
2859 {
2860 case RULE_EXPRESSION:
2861 *cfa = *(ULONG_PTR*)eval_expression(csw, (const unsigned char*)info->cfa_offset, context);
2862 break;
2863 case RULE_VAL_EXPRESSION:
2864 *cfa = eval_expression(csw, (const unsigned char*)info->cfa_offset, context);
2865 break;
2866 default:
2867 *cfa = get_context_reg(context, info->cfa_reg) + info->cfa_offset;
2868 break;
2869 }
2870 if (!*cfa) return;
2871
2872 for (i = 0; i < NB_FRAME_REGS; i++)
2873 {
2874 switch (info->rules[i])
2875 {
2876 case RULE_UNSET:
2877 case RULE_UNDEFINED:
2878 case RULE_SAME:
2879 break;
2880 case RULE_CFA_OFFSET:
2881 set_context_reg(csw, &new_context, i, *cfa + info->regs[i], TRUE);
2882 break;
2883 case RULE_OTHER_REG:
2884 copy_context_reg(&new_context, i, context, info->regs[i]);
2885 break;
2886 case RULE_EXPRESSION:
2887 value = eval_expression(csw, (const unsigned char*)info->regs[i], context);
2888 set_context_reg(csw, &new_context, i, value, TRUE);
2889 break;
2890 case RULE_VAL_EXPRESSION:
2891 value = eval_expression(csw, (const unsigned char*)info->regs[i], context);
2892 set_context_reg(csw, &new_context, i, value, FALSE);
2893 break;
2894 }
2895 }
2896 *context = new_context;
2897 }
2898
2899 /***********************************************************************
2900 * dwarf2_virtual_unwind
2901 *
2902 */
2903 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
2904 {
2905 struct module_pair pair;
2906 struct frame_info info;
2907 dwarf2_traverse_context_t cie_ctx, fde_ctx;
2908 struct module_format* modfmt;
2909 const unsigned char* end;
2910 DWORD_PTR delta;
2911
2912 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
2913 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
2914 !module_get_debug(&pair))
2915 return FALSE;
2916 modfmt = pair.effective->format_info[DFI_DWARF];
2917 if (!modfmt) return FALSE;
2918 memset(&info, 0, sizeof(info));
2919 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
2920 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
2921 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
2922 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
2923 * in this process the IMAGE section at a different address as the one expected by
2924 * the image
2925 */
2926 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
2927 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
2928 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info))
2929 {
2930 TRACE("Couldn't find information for %lx\n", ip);
2931 return FALSE;
2932 }
2933
2934 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
2935 ip, info.ip, info.code_align, info.data_align,
2936 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg)));
2937
2938 /* if at very beginning of function, return and use default unwinder */
2939 if (ip == info.ip) return FALSE;
2940 execute_cfa_instructions(&cie_ctx, ip, &info);
2941
2942 if (info.aug_z_format) /* get length of augmentation data */
2943 {
2944 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
2945 end = fde_ctx.data + len;
2946 }
2947 else end = NULL;
2948 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
2949 if (end) fde_ctx.data = end;
2950
2951 execute_cfa_instructions(&fde_ctx, ip, &info);
2952 apply_frame_info(csw, context, &info, cfa);
2953
2954 return TRUE;
2955 }
2956
2957 static void dwarf2_location_compute(struct process* pcs,
2958 const struct module_format* modfmt,
2959 const struct symt_function* func,
2960 struct location* loc)
2961 {
2962 struct location frame;
2963 DWORD_PTR ip;
2964 int err;
2965 dwarf2_traverse_context_t lctx;
2966
2967 if (!func->container || func->container->tag != SymTagCompiland)
2968 {
2969 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
2970 err = loc_err_internal;
2971 }
2972 else
2973 {
2974 /* instruction pointer relative to compiland's start */
2975 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
2976
2977 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
2978 {
2979 switch (loc->kind)
2980 {
2981 case loc_dwarf2_location_list:
2982 /* Then, if the variable has a location list, find it !! */
2983 if (dwarf2_lookup_loclist(modfmt,
2984 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
2985 ip, &lctx))
2986 goto do_compute;
2987 err = loc_err_out_of_scope;
2988 break;
2989 case loc_dwarf2_block:
2990 /* or if we have a copy of an existing block, get ready for it */
2991 {
2992 unsigned* ptr = (unsigned*)loc->offset;
2993
2994 lctx.data = (const BYTE*)(ptr + 1);
2995 lctx.end_data = lctx.data + *ptr;
2996 lctx.word_size = modfmt->u.dwarf2_info->word_size;
2997 }
2998 do_compute:
2999 /* now get the variable */
3000 err = compute_location(&lctx, loc, pcs->handle, &frame);
3001 break;
3002 case loc_register:
3003 case loc_regrel:
3004 /* nothing to do */
3005 break;
3006 default:
3007 WARN("Unsupported local kind %d\n", loc->kind);
3008 err = loc_err_internal;
3009 }
3010 }
3011 }
3012 if (err < 0)
3013 {
3014 loc->kind = loc_register;
3015 loc->reg = err;
3016 }
3017 }
3018
3019 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3020 {
3021 HeapFree(GetProcessHeap(), 0, modfmt);
3022 }
3023
3024 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
3025 const char* sectname, struct image_section_map* ism)
3026 {
3027 struct image_section_map local_ism;
3028
3029 if (!ism) ism = &local_ism;
3030 if (!image_find_section(fmap, sectname, ism))
3031 {
3032 section->address = NULL;
3033 section->size = 0;
3034 section->rva = 0;
3035 return FALSE;
3036 }
3037
3038 section->address = (const BYTE*)image_map_section(ism);
3039 section->size = image_get_map_size(ism);
3040 section->rva = image_get_map_rva(ism);
3041 return TRUE;
3042 }
3043
3044 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
3045 const struct elf_thunk_area* thunks,
3046 struct image_file_map* fmap)
3047 {
3048 dwarf2_section_t section[section_max];
3049 dwarf2_traverse_context_t mod_ctx;
3050 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3051 debug_line_sect;
3052 BOOL ret = TRUE;
3053 struct module_format* dwarf2_modfmt;
3054
3055 if (!dwarf2_init_section(&section[section_debug], fmap, ".debug_info", &debug_sect))
3056 {
3057 /* no Dwarf debug info here, so there's no error */
3058 return TRUE;
3059 }
3060 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", &debug_abbrev_sect);
3061 dwarf2_init_section(&section[section_string], fmap, ".debug_str", &debug_str_sect);
3062 dwarf2_init_section(&section[section_line], fmap, ".debug_line", &debug_line_sect);
3063
3064 if (section[section_debug].address == IMAGE_NO_MAP ||
3065 section[section_abbrev].address == IMAGE_NO_MAP ||
3066 section[section_string].address == IMAGE_NO_MAP)
3067 {
3068 ret = FALSE;
3069 goto leave;
3070 }
3071
3072 if (fmap->modtype == DMT_ELF)
3073 {
3074 /* debug info might have a different base address than .so file
3075 * when elf file is prelinked after splitting off debug info
3076 * adjust symbol base addresses accordingly
3077 */
3078 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3079 }
3080
3081 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3082
3083 mod_ctx.data = section[section_debug].address;
3084 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3085 mod_ctx.word_size = 0; /* will be correctly set later on */
3086
3087 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3088 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3089 if (!dwarf2_modfmt)
3090 {
3091 ret = FALSE;
3092 goto leave;
3093 }
3094 dwarf2_modfmt->module = module;
3095 dwarf2_modfmt->remove = dwarf2_module_remove;
3096 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3097 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3098 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3099 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3100
3101 /* As we'll need later some sections' content, we won't unmap these
3102 * sections upon existing this function
3103 */
3104 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", NULL);
3105 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", NULL);
3106 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->eh_frame, fmap, ".eh_frame", NULL);
3107
3108 while (mod_ctx.data < mod_ctx.end_data)
3109 {
3110 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3111 }
3112 dwarf2_modfmt->module->module.SymType = SymDia;
3113 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3114 /* FIXME: we could have a finer grain here */
3115 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3116 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3117 dwarf2_modfmt->module->module.SourceIndexed = TRUE;
3118 dwarf2_modfmt->module->module.Publics = TRUE;
3119
3120 leave:
3121 image_unmap_section(&debug_sect);
3122 image_unmap_section(&debug_abbrev_sect);
3123 image_unmap_section(&debug_str_sect);
3124 image_unmap_section(&debug_line_sect);
3125
3126 return ret;
3127 }
Windows API implementation