ReactOS 0.4.15-dev-7659-ga55345b
dwarf.c
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1/*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2011, 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#ifndef DBGHELP_STATIC_LIB
24
25#define NONAMELESSUNION
26
27#include <sys/types.h>
28#include <limits.h>
29#include <stdlib.h>
30#include <string.h>
31#include <stdio.h>
32#include <assert.h>
33#include <stdarg.h>
34
35#include "windef.h"
36#include "winternl.h"
37#include "winbase.h"
38#include "winuser.h"
39#include "ole2.h"
40#include "oleauto.h"
41
42#include "dbghelp_private.h"
43#include "image_private.h"
44#include "zlib.h"
45
46#include "wine/debug.h"
47
48#else
49#include "dbghelp_private.h"
50#include "image_private.h"
51#include "zlib.h"
52#endif /* !DBGHELP_STATIC_LIB */
53
55
56/* FIXME:
57 * - Functions:
58 * o unspecified parameters
59 * o inlined functions
60 * o Debug{Start|End}Point
61 * o CFA
62 * - Udt
63 * o proper types loading (nesting)
64 */
65
66#if 0
67static void dump(const void* ptr, unsigned len)
68{
69 int i, j;
70 BYTE msg[128];
71 static const char hexof[] = "0123456789abcdef";
72 const BYTE* x = ptr;
73
74 for (i = 0; i < len; i += 16)
75 {
76 sprintf(msg, "%08x: ", i);
77 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
78 for (j = 0; j < min(16, len - i); j++)
79 {
80 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
81 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
82 msg[10 + 3 * j + 2] = ' ';
83 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
84 x[i + j] : '.';
85 }
86 msg[10 + 3 * 16] = ' ';
87 msg[10 + 3 * 16 + 1 + 16] = '\0';
88 TRACE("%s\n", msg);
89 }
90}
91#endif
92
105#include "dwarf.h"
106
112{
117
119{
122 unsigned char have_child;
123 unsigned num_attr;
126
128{
129 unsigned size;
130 const unsigned char* ptr;
131};
132
134{
137 union
138 {
142 const char* string;
144 } u;
145};
146
148{
150 struct symt* symt;
151 const unsigned char** data;
155
156typedef struct dwarf2_section_s
157{
159 const unsigned char* address;
160 unsigned size;
163
165
167{
168 const unsigned char* data;
169 const unsigned char* end_data;
170 unsigned char word_size;
172
173/* symt_cache indexes */
174#define sc_void 0
175#define sc_int1 1
176#define sc_int2 2
177#define sc_int4 3
178#define sc_num 4
179
181{
183 unsigned section;
184 struct pool pool;
185 struct module* module;
187 const struct elf_thunk_area*thunks;
192 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
193 char* cpp_name;
195
196/* stored in the dbghelp's module internal structure for later reuse */
198{
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 */
210
211static unsigned char dwarf2_get_byte(const unsigned char* ptr)
212{
213 return *ptr;
214}
215
217{
218 unsigned char uvalue = dwarf2_get_byte(ctx->data);
219 ctx->data += 1;
220 return uvalue;
221}
222
223static unsigned short dwarf2_get_u2(const unsigned char* ptr)
224{
225 return *(const UINT16*)ptr;
226}
227
229{
230 unsigned short uvalue = dwarf2_get_u2(ctx->data);
231 ctx->data += 2;
232 return uvalue;
233}
234
235static ULONG_PTR dwarf2_get_u4(const unsigned char* ptr)
236{
237 return *(const UINT32*)ptr;
238}
239
241{
242 ULONG_PTR uvalue = dwarf2_get_u4(ctx->data);
243 ctx->data += 4;
244 return uvalue;
245}
246
247static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
248{
249 return *(const UINT64*)ptr;
250}
251
253{
254 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
255 ctx->data += 8;
256 return uvalue;
257}
258
259static ULONG_PTR dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
260{
261 ULONG_PTR 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
277{
279
280 assert(ctx);
281
282 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
283
284 return ret;
285}
286
287static LONG_PTR dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
288{
289 LONG_PTR 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
313{
314 LONG_PTR ret = 0;
315
316 assert(ctx);
317
318 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
319 return ret;
320}
321
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 */
336static ULONG_PTR dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
337{
339
340 switch (word_size)
341 {
342 case 4:
344 break;
345 case 8:
347 break;
348 default:
349 FIXME("Unsupported Word Size %u\n", word_size);
350 ret = 0;
351 }
352 return ret;
353}
354
356{
357 ULONG_PTR ret = dwarf2_get_addr(ctx->data, ctx->word_size);
358 ctx->data += ctx->word_size;
359 return ret;
360}
361
363{
364 return wine_dbg_sprintf("ctx(%p)", ctx->data);
365}
366
368{
369 return wine_dbg_sprintf("ctx(%p,%s)",
370 ctx, debugstr_w(ctx->module->module.ModuleName));
371}
372
373static 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
381 ULONG_PTR entry_code)
382{
383 assert( NULL != abbrev_table );
384 return sparse_array_find(abbrev_table, entry_code);
385}
386
388 struct sparse_array* abbrev_table,
389 struct pool* pool)
390{
391 ULONG_PTR entry_code;
392 dwarf2_abbrev_entry_t* abbrev_entry;
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 {
431 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
432 if (!attribute) break;
433
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
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_flag_present: step = 0; break;
459 case DW_FORM_ref_addr:
460 case DW_FORM_addr: step = ctx->word_size; break;
461 case DW_FORM_flag:
462 case DW_FORM_data1:
463 case DW_FORM_ref1: step = 1; break;
464 case DW_FORM_data2:
465 case DW_FORM_ref2: step = 2; break;
466 case DW_FORM_data4:
467 case DW_FORM_ref4:
468 case DW_FORM_strp: step = 4; break;
469 case DW_FORM_data8:
470 case DW_FORM_ref8: step = 8; break;
471 case DW_FORM_sdata:
473 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
474 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
475 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
476 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
477 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
478 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
479 default:
480 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
481 return;
482 }
483 ctx->data += step;
484}
485
487 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
488 const unsigned char* data,
489 struct attribute* attr)
490{
491 attr->form = abbrev_attr->form;
492 switch (attr->form)
493 {
494 case DW_FORM_ref_addr:
495 case DW_FORM_addr:
496 attr->u.uvalue = dwarf2_get_addr(data,
497 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
498 TRACE("addr<0x%lx>\n", attr->u.uvalue);
499 break;
500
501 case DW_FORM_flag:
502 attr->u.uvalue = dwarf2_get_byte(data);
503 TRACE("flag<0x%lx>\n", attr->u.uvalue);
504 break;
505
507 attr->u.uvalue = 1;
508 TRACE("flag_present\n");
509 break;
510
511 case DW_FORM_data1:
512 attr->u.uvalue = dwarf2_get_byte(data);
513 TRACE("data1<%lu>\n", attr->u.uvalue);
514 break;
515
516 case DW_FORM_data2:
517 attr->u.uvalue = dwarf2_get_u2(data);
518 TRACE("data2<%lu>\n", attr->u.uvalue);
519 break;
520
521 case DW_FORM_data4:
522 attr->u.uvalue = dwarf2_get_u4(data);
523 TRACE("data4<%lu>\n", attr->u.uvalue);
524 break;
525
526 case DW_FORM_data8:
527 attr->u.lluvalue = dwarf2_get_u8(data);
528 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
529 break;
530
531 case DW_FORM_ref1:
532 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
533 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
534 break;
535
536 case DW_FORM_ref2:
537 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
538 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
539 break;
540
541 case DW_FORM_ref4:
542 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
543 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
544 break;
545
546 case DW_FORM_ref8:
547 FIXME("Unhandled 64-bit support\n");
548 break;
549
550 case DW_FORM_sdata:
552 break;
553
556 break;
557
558 case DW_FORM_udata:
560 break;
561
562 case DW_FORM_string:
563 attr->u.string = (const char *)data;
564 TRACE("string<%s>\n", debugstr_a(attr->u.string));
565 break;
566
567 case DW_FORM_strp:
568 {
570 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
571 }
572 TRACE("strp<%s>\n", debugstr_a(attr->u.string));
573 break;
574
575 case DW_FORM_block:
576 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
577 break;
578
579 case DW_FORM_block1:
580 attr->u.block.size = dwarf2_get_byte(data);
581 attr->u.block.ptr = data + 1;
582 break;
583
584 case DW_FORM_block2:
585 attr->u.block.size = dwarf2_get_u2(data);
586 attr->u.block.ptr = data + 2;
587 break;
588
589 case DW_FORM_block4:
590 attr->u.block.size = dwarf2_get_u4(data);
591 attr->u.block.ptr = data + 4;
592 break;
593
594 default:
595 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
596 break;
597 }
598}
599
601 const dwarf2_debug_info_t* di,
602 unsigned at, struct attribute* attr)
603{
604 unsigned i, refidx = 0;
605 dwarf2_abbrev_entry_attr_t* abbrev_attr;
606 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL;
607
608 attr->gotten_from = attr_direct;
609 while (di)
610 {
611 ref_abbrev_attr = NULL;
612 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
613 {
614 if (abbrev_attr->attribute == at)
615 {
616 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
617 return TRUE;
618 }
619 if ((abbrev_attr->attribute == DW_AT_abstract_origin ||
620 abbrev_attr->attribute == DW_AT_specification) &&
621 at != DW_AT_sibling)
622 {
623 if (ref_abbrev_attr)
624 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute);
625 ref_abbrev_attr = abbrev_attr;
626 refidx = i;
627 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ?
628 attr_abstract_origin : attr_specification;
629 }
630 }
631 /* do we have either an abstract origin or a specification debug entry to look into ? */
632 if (!ref_abbrev_attr) break;
633 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr);
634 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
635 FIXME("Should have found the debug info entry\n");
636 }
637 return FALSE;
638}
639
641
642#define Wine_DW_no_register 0x7FFFFFFF
643
644static unsigned dwarf2_map_register(int regno, const struct module* module)
645{
646 if (regno == Wine_DW_no_register)
647 {
648 FIXME("What the heck map reg 0x%x\n",regno);
649 return 0;
650 }
651 return dbghelp_current_cpu->map_dwarf_register(regno, module, FALSE);
652}
653
654static enum location_error
656 HANDLE hproc, const struct location* frame)
657{
658 DWORD_PTR tmp, stack[64];
659 unsigned stk;
660 unsigned char op;
661 BOOL piece_found = FALSE;
662
663 stack[stk = 0] = 0;
664
665 loc->kind = loc_absolute;
667
668 while (ctx->data < ctx->end_data)
669 {
671
672 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
673 stack[++stk] = op - DW_OP_lit0;
674 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
675 {
676 /* dbghelp APIs don't know how to cope with this anyway
677 * (for example 'long long' stored in two registers)
678 * FIXME: We should tell winedbg how to deal with it (sigh)
679 */
680 if (!piece_found)
681 {
683 if (loc->reg != Wine_DW_no_register)
684 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n",
685 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
686 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
687 loc->reg = cvreg;
688 }
689 loc->kind = loc_register;
690 }
691 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
692 {
693 /* dbghelp APIs don't know how to cope with this anyway
694 * (for example 'long long' stored in two registers)
695 * FIXME: We should tell winedbg how to deal with it (sigh)
696 */
697 if (!piece_found)
698 {
700 if (loc->reg != Wine_DW_no_register)
701 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n",
702 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
703 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
704 loc->reg = cvreg;
705 }
707 loc->kind = loc_regrel;
708 }
709 else switch (op)
710 {
711 case DW_OP_nop: break;
712 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
713 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
714 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
715 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
716 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
717 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
718 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
719 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
720 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
721 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
722 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
723 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
724 case DW_OP_drop: stk--; break;
725 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
726 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
727 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
728 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
729 case DW_OP_abs: stack[stk] = sizeof(stack[stk]) == 8 ? llabs((INT64)stack[stk]) : abs((INT32)stack[stk]); break;
730 case DW_OP_neg: stack[stk] = -stack[stk]; break;
731 case DW_OP_not: stack[stk] = ~stack[stk]; break;
732 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
733 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
734 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
735 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
736 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
737 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
738 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
739 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
741 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
742 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
743 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
744 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
745 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
746 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
747 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
748 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
749 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
750 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
751 case DW_OP_bra:
752 tmp = dwarf2_parse_u2(ctx);
753 if (!stack[stk--]) ctx->data += tmp;
754 break;
755 case DW_OP_regx:
757 if (!piece_found)
758 {
759 if (loc->reg != Wine_DW_no_register)
760 FIXME("Only supporting one reg\n");
761 loc->reg = dwarf2_map_register(tmp, module);
762 }
763 loc->kind = loc_register;
764 break;
765 case DW_OP_bregx:
767 if (loc->reg != Wine_DW_no_register)
768 FIXME("Only supporting one regx\n");
769 loc->reg = dwarf2_map_register(tmp, module);
771 loc->kind = loc_regrel;
772 break;
773 case DW_OP_fbreg:
774 if (loc->reg != Wine_DW_no_register)
775 FIXME("Only supporting one reg (%s/%d -> -2)\n",
776 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg);
777 if (frame && frame->kind == loc_register)
778 {
779 loc->kind = loc_regrel;
780 loc->reg = frame->reg;
782 }
783 else if (frame && frame->kind == loc_regrel)
784 {
785 loc->kind = loc_regrel;
786 loc->reg = frame->reg;
787 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
788 }
789 else
790 {
791 /* FIXME: this could be later optimized by not recomputing
792 * this very location expression
793 */
794 loc->kind = loc_dwarf2_block;
796 }
797 break;
798 case DW_OP_piece:
799 {
800 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
801 WARN("Not handling OP_piece (size=%d)\n", sz);
802 piece_found = TRUE;
803 }
804 break;
805 case DW_OP_deref:
806 if (!stk)
807 {
808 FIXME("Unexpected empty stack\n");
809 return loc_err_internal;
810 }
811 if (loc->reg != Wine_DW_no_register)
812 {
813 WARN("Too complex expression for deref\n");
814 return loc_err_too_complex;
815 }
816 if (hproc)
817 {
818 DWORD_PTR addr = stack[stk--];
819 DWORD_PTR deref = 0;
820
821 if (!ReadProcessMemory(hproc, (void*)addr, &deref, ctx->word_size, NULL))
822 {
823 WARN("Couldn't read memory at %lx\n", addr);
824 return loc_err_cant_read;
825 }
826 stack[++stk] = deref;
827 }
828 else
829 {
830 loc->kind = loc_dwarf2_block;
831 }
832 break;
833 case DW_OP_deref_size:
834 if (!stk)
835 {
836 FIXME("Unexpected empty stack\n");
837 return loc_err_internal;
838 }
839 if (loc->reg != Wine_DW_no_register)
840 {
841 WARN("Too complex expression for deref\n");
842 return loc_err_too_complex;
843 }
844 if (hproc)
845 {
846 DWORD_PTR addr = stack[stk--];
847 BYTE derefsize = dwarf2_parse_byte(ctx);
848 DWORD64 deref;
849
850 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
851 {
852 WARN("Couldn't read memory at %lx\n", addr);
853 return loc_err_cant_read;
854 }
855
856 switch (derefsize)
857 {
858 case 1: stack[++stk] = *(unsigned char*)&deref; break;
859 case 2: stack[++stk] = *(unsigned short*)&deref; break;
860 case 4: stack[++stk] = *(DWORD*)&deref; break;
861 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
862 }
863 }
864 else
865 {
867 loc->kind = loc_dwarf2_block;
868 }
869 break;
871 /* Expected behaviour is that this is the last instruction of this
872 * expression and just the "top of stack" value should be put to loc->offset. */
873 break;
874 default:
875 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
876 FIXME("Unhandled attr op: %x\n", op);
877 /* FIXME else unhandled extension */
878 return loc_err_internal;
879 }
880 }
881 loc->offset = stack[stk];
882 return 0;
883}
884
886 const dwarf2_debug_info_t* di,
888 struct location* loc,
889 const struct location* frame)
890{
891 struct attribute xloc;
892
893 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
894
895 switch (xloc.form)
896 {
897 case DW_FORM_data1: case DW_FORM_data2:
898 case DW_FORM_udata: case DW_FORM_sdata:
899 loc->kind = loc_absolute;
900 loc->reg = 0;
901 loc->offset = xloc.u.uvalue;
902 return TRUE;
903 case DW_FORM_data4: case DW_FORM_data8:
906 loc->offset = xloc.u.uvalue;
907 return TRUE;
908 case DW_FORM_block:
909 case DW_FORM_block1:
910 case DW_FORM_block2:
911 case DW_FORM_block4:
912 break;
913 default: FIXME("Unsupported yet form %lx\n", xloc.form);
914 return FALSE;
915 }
916
917 /* assume we have a block form */
918
919 if (xloc.u.block.size)
920 {
922 enum location_error err;
923
924 lctx.data = xloc.u.block.ptr;
925 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
926 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
927
928 err = compute_location(ctx->module, &lctx, loc, NULL, frame);
929 if (err < 0)
930 {
931 loc->kind = loc_error;
932 loc->reg = err;
933 }
934 else if (loc->kind == loc_dwarf2_block)
935 {
936 unsigned* ptr = pool_alloc(&ctx->module->pool,
937 sizeof(unsigned) + xloc.u.block.size);
938 *ptr = xloc.u.block.size;
939 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
940 loc->offset = (ULONG_PTR)ptr;
941 compute_location(ctx->module, &lctx, loc, NULL, frame);
942 }
943 }
944 return TRUE;
945}
946
948 const dwarf2_debug_info_t* di)
949{
950 struct attribute attr;
952
954 return NULL;
955 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
956 {
957 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
958 return NULL;
959 }
960 if (!type->symt)
961 {
962 /* load the debug info entity */
964 if (!type->symt)
965 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
966 }
967 return type->symt;
968}
969
971{
972 char* last;
973 struct attribute diname;
974 struct attribute spec;
975
976 if (di->abbrev->tag == DW_TAG_compile_unit) return name;
977 if (!ctx->cpp_name)
978 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME);
979 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1;
980 strcpy(last, name);
981
982 /* if the di is a definition, but has also a (previous) declaration, then scope must
983 * be gotten from declaration not definition
984 */
986 {
987 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue);
988 if (!di)
989 {
990 FIXME("Should have found the debug info entry\n");
991 return NULL;
992 }
993 }
994
995 for (di = di->parent; di; di = di->parent)
996 {
997 switch (di->abbrev->tag)
998 {
999 case DW_TAG_namespace:
1001 case DW_TAG_class_type:
1003 case DW_TAG_union_type:
1004 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname))
1005 {
1006 size_t len = strlen(diname.u.string);
1007 last -= 2 + len;
1008 if (last < ctx->cpp_name) return NULL;
1009 memcpy(last, diname.u.string, len);
1010 last[len] = last[len + 1] = ':';
1011 }
1012 break;
1013 default:
1014 break;
1015 }
1016 }
1017 return last;
1018}
1019
1020/******************************************************************
1021 * dwarf2_read_range
1022 *
1023 * read a range for a given debug_info (either using AT_range attribute, in which
1024 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
1025 * in all cases, range is relative to beginning of compilation unit
1026 */
1028 ULONG_PTR* plow, ULONG_PTR* phigh)
1029{
1030 struct attribute range;
1031
1033 {
1035 ULONG_PTR low, high;
1036
1037 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
1038 traverse.end_data = ctx->sections[section_ranges].address +
1039 ctx->sections[section_ranges].size;
1040 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1041
1042 *plow = ULONG_MAX;
1043 *phigh = 0;
1044 while (traverse.data + 2 * traverse.word_size < traverse.end_data)
1045 {
1046 low = dwarf2_parse_addr(&traverse);
1047 high = dwarf2_parse_addr(&traverse);
1048 if (low == 0 && high == 0) break;
1049 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
1050 if (low < *plow) *plow = low;
1051 if (high > *phigh) *phigh = high;
1052 }
1053 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
1054 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
1055
1056 return TRUE;
1057 }
1058 else
1059 {
1060 struct attribute low_pc;
1061 struct attribute high_pc;
1062
1063 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
1064 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
1065 return FALSE;
1066 *plow = low_pc.u.uvalue;
1067 *phigh = high_pc.u.uvalue;
1068 return TRUE;
1069 }
1070}
1071
1072/******************************************************************
1073 * dwarf2_read_one_debug_info
1074 *
1075 * Loads into memory one debug info entry, and recursively its children (if any)
1076 */
1078 dwarf2_traverse_context_t* traverse,
1079 dwarf2_debug_info_t* parent_di,
1081{
1082 const dwarf2_abbrev_entry_t*abbrev;
1083 ULONG_PTR entry_code;
1087 dwarf2_debug_info_t** where;
1089 unsigned i;
1090 struct attribute sibling;
1091
1092 offset = traverse->data - ctx->sections[ctx->section].address;
1093 entry_code = dwarf2_leb128_as_unsigned(traverse);
1094 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
1095 if (!entry_code)
1096 {
1097 *pdi = NULL;
1098 return TRUE;
1099 }
1100 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
1101 if (!abbrev)
1102 {
1103 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
1104 return FALSE;
1105 }
1106 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
1107 if (!di) return FALSE;
1108 di->abbrev = abbrev;
1109 di->symt = NULL;
1110 di->parent = parent_di;
1111
1112 if (abbrev->num_attr)
1113 {
1114 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
1115 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
1116 {
1117 di->data[i] = traverse->data;
1118 dwarf2_swallow_attribute(traverse, attr);
1119 }
1120 }
1121 else di->data = NULL;
1122 if (abbrev->have_child)
1123 {
1124 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
1125 while (traverse->data < traverse->end_data)
1126 {
1127 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE;
1128 if (!child) break;
1129 where = vector_add(&di->children, &ctx->pool);
1130 if (!where) return FALSE;
1131 *where = child;
1132 }
1133 }
1134 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1135 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1136 {
1137 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1138 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1139 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1140 }
1141 *pdi = di;
1142 return TRUE;
1143}
1144
1147{
1148 struct attribute spec;
1149
1150 while (di)
1151 {
1152 if (di->abbrev->have_child)
1153 return &di->children;
1154 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break;
1155 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue)))
1156 FIXME("Should have found the debug info entry\n");
1157 }
1158 return NULL;
1159}
1160
1163{
1164 struct attribute name;
1165 struct attribute size;
1166 struct attribute encoding;
1167 enum BasicType bt;
1168 int cache_idx = -1;
1169 if (di->symt) return di->symt;
1170
1171 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1172
1174 name.u.string = NULL;
1175 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1177
1178 switch (encoding.u.uvalue)
1179 {
1180 case DW_ATE_void: bt = btVoid; break;
1181 case DW_ATE_address: bt = btULong; break;
1182 case DW_ATE_boolean: bt = btBool; break;
1183 case DW_ATE_complex_float: bt = btComplex; break;
1184 case DW_ATE_float: bt = btFloat; break;
1185 case DW_ATE_signed: bt = btInt; break;
1186 case DW_ATE_unsigned: bt = btUInt; break;
1187 case DW_ATE_signed_char: bt = btChar; break;
1188 case DW_ATE_unsigned_char: bt = btChar; break;
1189 default: bt = btNoType; break;
1190 }
1191 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1192 switch (bt)
1193 {
1194 case btVoid:
1195 assert(size.u.uvalue == 0);
1196 cache_idx = sc_void;
1197 break;
1198 case btInt:
1199 switch (size.u.uvalue)
1200 {
1201 case 1: cache_idx = sc_int1; break;
1202 case 2: cache_idx = sc_int2; break;
1203 case 4: cache_idx = sc_int4; break;
1204 }
1205 break;
1206 default: break;
1207 }
1208 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1209 ctx->symt_cache[cache_idx] = di->symt;
1210
1211 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1212 return di->symt;
1213}
1214
1217{
1218 struct symt* ref_type;
1219 struct attribute name;
1220
1221 if (di->symt) return di->symt;
1222
1223 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1224
1225 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1226 ref_type = dwarf2_lookup_type(ctx, di);
1227
1228 if (name.u.string)
1229 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1230 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1231 return di->symt;
1232}
1233
1236{
1237 struct symt* ref_type;
1238 struct attribute size;
1239
1240 if (di->symt) return di->symt;
1241
1242 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1243
1244 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
1245 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1246 {
1247 ref_type = ctx->symt_cache[sc_void];
1248 assert(ref_type);
1249 }
1250 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
1251 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1252 return di->symt;
1253}
1254
1257{
1258 struct symt* ref_type;
1259 struct symt* idx_type = NULL;
1260 struct attribute min, max, cnt;
1262 unsigned int i;
1263 const struct vector* children;
1264
1265 if (di->symt) return di->symt;
1266
1267 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1268
1269 ref_type = dwarf2_lookup_type(ctx, di);
1270
1271 if (!(children = dwarf2_get_di_children(ctx, di)))
1272 {
1273 /* fake an array with unknown size */
1274 /* FIXME: int4 even on 64bit machines??? */
1275 idx_type = ctx->symt_cache[sc_int4];
1276 min.u.uvalue = 0;
1277 max.u.uvalue = -1;
1278 }
1279 else for (i = 0; i < vector_length(children); i++)
1280 {
1281 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1282 switch (child->abbrev->tag)
1283 {
1285 idx_type = dwarf2_lookup_type(ctx, child);
1287 min.u.uvalue = 0;
1289 max.u.uvalue = 0;
1291 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1292 break;
1293 default:
1294 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1295 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1296 break;
1297 }
1298 }
1299 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1300 return di->symt;
1301}
1302
1305{
1306 struct symt* ref_type;
1307
1308 if (di->symt) return di->symt;
1309
1310 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1311
1312 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1313 {
1314 ref_type = ctx->symt_cache[sc_void];
1315 assert(ref_type);
1316 }
1317 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1318 di->symt = ref_type;
1319
1320 return ref_type;
1321}
1322
1325{
1326 struct symt* ref_type;
1327
1328 if (di->symt) return di->symt;
1329
1330 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1331
1332 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1333 {
1334 ref_type = ctx->symt_cache[sc_void];
1335 assert(ref_type);
1336 }
1337 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1338 di->symt = ref_type;
1339
1340 return ref_type;
1341}
1342
1345{
1346 struct attribute name;
1347 struct attribute size;
1348 struct symt_basic *basic;
1349
1350 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1351
1352 if (di->symt) return di->symt;
1353
1355 name.u.string = "void";
1356 size.u.uvalue = sizeof(void *);
1357
1358 basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue);
1359 di->symt = &basic->symt;
1360
1361 if (!ctx->symt_cache[sc_void])
1362 ctx->symt_cache[sc_void] = di->symt;
1363
1364 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1365 return di->symt;
1366}
1367
1370{
1371 struct symt* ref_type = NULL;
1372
1373 if (di->symt) return di->symt;
1374
1375 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1376
1377 ref_type = dwarf2_lookup_type(ctx, di);
1378 /* FIXME: for now, we hard-wire C++ references to pointers */
1379 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
1380
1381 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1382
1383 return di->symt;
1384}
1385
1388 struct symt_udt* parent)
1389{
1390 struct symt* elt_type;
1391 struct attribute name;
1392 struct attribute bit_size;
1393 struct attribute bit_offset;
1394 struct location loc;
1395
1396 assert(parent);
1397
1398 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1399
1400 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1401 elt_type = dwarf2_lookup_type(ctx, di);
1403 {
1404 if (loc.kind != loc_absolute)
1405 {
1406 FIXME("Found register, while not expecting it\n");
1407 loc.offset = 0;
1408 }
1409 else
1410 TRACE("found member_location at %s -> %lu\n",
1412 }
1413 else
1414 loc.offset = 0;
1415 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1416 bit_size.u.uvalue = 0;
1417 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1418 {
1419 /* FIXME: we should only do this when implementation is LSB (which is
1420 * the case on i386 processors)
1421 */
1422 struct attribute nbytes;
1423 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1424 {
1425 DWORD64 size;
1426 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1427 (ULONG_PTR)size : 0;
1428 }
1429 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1430 }
1431 else bit_offset.u.uvalue = 0;
1432 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1433 (loc.offset << 3) + bit_offset.u.uvalue,
1434 bit_size.u.uvalue);
1435
1436 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1437}
1438
1441
1444 enum UdtKind udt)
1445{
1446 struct attribute name;
1447 struct attribute size;
1448 struct vector* children;
1450 unsigned int i;
1451
1452 if (di->symt) return di->symt;
1453
1454 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1455
1456 /* quirk... FIXME provide real support for anonymous UDTs */
1458 name.u.string = "zz_anon_zz";
1459 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1460
1461 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string),
1462 size.u.uvalue, udt)->symt;
1463
1464 children = dwarf2_get_di_children(ctx, di);
1465 if (children) for (i = 0; i < vector_length(children); i++)
1466 {
1467 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1468
1469 switch (child->abbrev->tag)
1470 {
1471 case DW_TAG_array_type:
1473 break;
1474 case DW_TAG_member:
1475 /* FIXME: should I follow the sibling stuff ?? */
1477 break;
1480 break;
1481 case DW_TAG_subprogram:
1483 break;
1484 case DW_TAG_const_type:
1486 break;
1488 case DW_TAG_class_type:
1489 case DW_TAG_union_type:
1490 case DW_TAG_typedef:
1491 /* FIXME: we need to handle nested udt definitions */
1492 case DW_TAG_inheritance:
1495 case DW_TAG_variable:
1500 /* FIXME: some C++ related stuff */
1501 break;
1502 default:
1503 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1504 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1505 break;
1506 }
1507 }
1508
1509 return di->symt;
1510}
1511
1514 struct symt_enum* parent)
1515{
1516 struct attribute name;
1517 struct attribute value;
1518
1519 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1520
1521 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1522 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1523 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1524
1525 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1526}
1527
1530{
1531 struct attribute name;
1532 struct attribute size;
1533 struct symt_basic* basetype;
1534 struct vector* children;
1536 unsigned int i;
1537
1538 if (di->symt) return di->symt;
1539
1540 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1541
1542 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1543 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1544
1545 switch (size.u.uvalue) /* FIXME: that's wrong */
1546 {
1547 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1548 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1549 default:
1550 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1551 }
1552
1553 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1554
1555 children = dwarf2_get_di_children(ctx, di);
1556 /* FIXME: should we use the sibling stuff ?? */
1557 if (children) for (i = 0; i < vector_length(children); i++)
1558 {
1559 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1560
1561 switch (child->abbrev->tag)
1562 {
1563 case DW_TAG_enumerator:
1565 break;
1566 default:
1567 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1569 }
1570 }
1571 return di->symt;
1572}
1573
1574/* structure used to pass information around when parsing a subprogram */
1576{
1582
1583/******************************************************************
1584 * dwarf2_parse_variable
1585 *
1586 * Parses any variable (parameter, local/global variable)
1587 */
1589 struct symt_block* block,
1591{
1592 struct symt* param_type;
1593 struct attribute name, value;
1594 struct location loc;
1595 BOOL is_pmt;
1596
1597 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1598
1599 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1600 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1601
1602 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1603 /* cannot do much without the name, the functions below won't like it. */
1604 return;
1605 }
1607 &loc, &subpgm->frame))
1608 {
1609 struct attribute ext;
1610
1611 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1612 debugstr_a(name.u.string), loc.kind, loc.offset, loc.reg,
1613 dwarf2_debug_ctx(subpgm->ctx));
1614
1615 switch (loc.kind)
1616 {
1617 case loc_error:
1618 break;
1619 case loc_absolute:
1620 /* it's a global variable */
1621 /* FIXME: we don't handle its scope yet */
1622 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1623 ext.u.uvalue = 0;
1624 loc.offset += subpgm->ctx->load_offset;
1625 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland,
1626 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue,
1627 loc, 0, param_type);
1628 break;
1629 default:
1630 subpgm->non_computed_variable = TRUE;
1631 /* fall through */
1632 case loc_register:
1633 case loc_regrel:
1634 /* either a pmt/variable relative to frame pointer or
1635 * pmt/variable in a register
1636 */
1637 assert(subpgm->func);
1638 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1639 is_pmt ? DataIsParam : DataIsLocal,
1640 &loc, block, param_type, name.u.string);
1641 break;
1642 }
1643 }
1644 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1645 {
1646 VARIANT v;
1647 if (subpgm->func) WARN("Unsupported constant %s in function\n", debugstr_a(name.u.string));
1648 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", debugstr_a(name.u.string));
1649 switch (value.form)
1650 {
1651 case DW_FORM_data1:
1652 case DW_FORM_data2:
1653 case DW_FORM_data4:
1654 case DW_FORM_udata:
1655 case DW_FORM_addr:
1656 v.n1.n2.vt = VT_UI4;
1657 v.n1.n2.n3.lVal = value.u.uvalue;
1658 break;
1659
1660 case DW_FORM_data8:
1661 v.n1.n2.vt = VT_UI8;
1662 v.n1.n2.n3.llVal = value.u.lluvalue;
1663 break;
1664
1665 case DW_FORM_sdata:
1666 v.n1.n2.vt = VT_I4;
1667 v.n1.n2.n3.lVal = value.u.svalue;
1668 break;
1669
1670 case DW_FORM_strp:
1671 case DW_FORM_string:
1672 /* FIXME: native doesn't report const strings from here !!
1673 * however, the value of the string is in the code somewhere
1674 */
1675 v.n1.n2.vt = VT_I1 | VT_BYREF;
1676 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1677 break;
1678
1679 case DW_FORM_block:
1680 case DW_FORM_block1:
1681 case DW_FORM_block2:
1682 case DW_FORM_block4:
1683 v.n1.n2.vt = VT_I4;
1684 switch (value.u.block.size)
1685 {
1686 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1687 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1688 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1689 default:
1690 v.n1.n2.vt = VT_I1 | VT_BYREF;
1691 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1692 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1693 }
1694 break;
1695
1696 default:
1697 FIXME("Unsupported form for const value %s (%lx)\n",
1698 debugstr_a(name.u.string), value.form);
1699 v.n1.n2.vt = VT_EMPTY;
1700 }
1701 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland,
1702 name.u.string, param_type, &v)->symt;
1703 }
1704 else
1705 {
1706 /* variable has been optimized away... report anyway */
1707 loc.kind = loc_error;
1709 if (subpgm->func)
1710 {
1711 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1712 is_pmt ? DataIsParam : DataIsLocal,
1713 &loc, block, param_type, name.u.string);
1714 }
1715 else
1716 {
1717 WARN("dropping global variable %s which has been optimized away\n", debugstr_a(name.u.string));
1718 }
1719 }
1720 if (is_pmt && subpgm->func && subpgm->func->type)
1722 (struct symt_function_signature*)subpgm->func->type,
1723 param_type);
1724
1725 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n");
1726}
1727
1729 const dwarf2_debug_info_t* di)
1730{
1731 struct attribute name;
1732 struct attribute low_pc;
1733 struct location loc;
1734
1735 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1736
1737 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1738 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1739 name.u.string = NULL;
1740
1741 loc.kind = loc_absolute;
1742 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1744 &loc, name.u.string);
1745}
1746
1748 struct symt_block* parent_block,
1750
1753
1755 struct symt_block* parent_block,
1757{
1758 struct symt_block* block;
1759 ULONG_PTR low_pc, high_pc;
1760 struct vector* children;
1762 unsigned int i;
1763
1764 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1765
1766 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1767 {
1768 FIXME("cannot read range\n");
1769 return;
1770 }
1771
1772 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1773 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1774 high_pc - low_pc);
1775
1776 children = dwarf2_get_di_children(subpgm->ctx, di);
1777 if (children) for (i = 0; i < vector_length(children); i++)
1778 {
1779 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1780
1781 switch (child->abbrev->tag)
1782 {
1784 case DW_TAG_variable:
1786 break;
1789 break;
1792 break;
1793 case DW_TAG_label:
1795 break;
1797 /* this isn't properly supported by dbghelp interface. skip it for now */
1798 break;
1799 default:
1800 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1801 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1802 dwarf2_debug_di(di));
1803 }
1804 }
1805 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1806}
1807
1809 struct symt_block* parent_block,
1811{
1812 struct symt_block* block;
1813 ULONG_PTR low_pc, high_pc;
1814 struct vector* children;
1816 unsigned int i;
1817
1818 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1819
1820 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1821 {
1822 WARN("no range\n");
1823 return;
1824 }
1825
1826 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1827 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1828 high_pc - low_pc);
1829
1830 children = dwarf2_get_di_children(subpgm->ctx, di);
1831 if (children) for (i = 0; i < vector_length(children); i++)
1832 {
1833 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1834
1835 switch (child->abbrev->tag)
1836 {
1839 break;
1840 case DW_TAG_variable:
1842 break;
1844 dwarf2_parse_pointer_type(subpgm->ctx, di);
1845 break;
1847 dwarf2_parse_subroutine_type(subpgm->ctx, di);
1848 break;
1849 case DW_TAG_const_type:
1850 dwarf2_parse_const_type(subpgm->ctx, di);
1851 break;
1854 break;
1855 case DW_TAG_subprogram:
1856 /* FIXME: likely a declaration (to be checked)
1857 * skip it for now
1858 */
1859 break;
1861 /* FIXME: likely elements for exception handling (GCC flavor)
1862 * Skip it for now
1863 */
1864 break;
1866 /* C++ stuff to be silenced (for now) */
1867 break;
1869 /* this isn't properly supported by dbghelp interface. skip it for now */
1870 break;
1871 case DW_TAG_label:
1873 break;
1874 case DW_TAG_class_type:
1876 case DW_TAG_union_type:
1878 case DW_TAG_typedef:
1879 /* the type referred to will be loaded when we need it, so skip it */
1880 break;
1881 default:
1882 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1883 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1884 }
1885 }
1886
1887 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1888}
1889
1892{
1893 struct attribute name;
1894 ULONG_PTR low_pc, high_pc;
1895 struct attribute is_decl;
1896 struct attribute inline_flags;
1897 struct symt* ret_type;
1898 struct symt_function_signature* sig_type;
1899 dwarf2_subprogram_t subpgm;
1900 struct vector* children;
1902 unsigned int i;
1903
1904 if (di->symt) return di->symt;
1905
1906 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1907
1909 {
1910 WARN("No name for function... dropping function\n");
1911 return NULL;
1912 }
1913 /* if it's an abstract representation of an inline function, there should be
1914 * a concrete object that we'll handle
1915 */
1916 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) &&
1917 inline_flags.u.uvalue != DW_INL_not_inlined)
1918 {
1919 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1920 debugstr_a(name.u.string), inline_flags.u.uvalue);
1921 return NULL;
1922 }
1923
1924 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) &&
1925 is_decl.u.uvalue && is_decl.gotten_from == attr_direct)
1926 {
1927 /* it's a real declaration, skip it */
1928 return NULL;
1929 }
1930 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
1931 {
1932 WARN("cannot get range for %s\n", debugstr_a(name.u.string));
1933 return NULL;
1934 }
1935 /* As functions (defined as inline assembly) get debug info with dwarf
1936 * (not the case for stabs), we just drop Wine's thunks here...
1937 * Actual thunks will be created in elf_module from the symbol table
1938 */
1939#ifndef __REACTOS__
1940 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
1941 return NULL;
1942#endif
1943 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1944 {
1945 ret_type = ctx->symt_cache[sc_void];
1946 assert(ret_type);
1947 }
1948 /* FIXME: assuming C source code */
1949 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1950 subpgm.func = symt_new_function(ctx->module, ctx->compiland,
1951 dwarf2_get_cpp_name(ctx, di, name.u.string),
1952 ctx->load_offset + low_pc, high_pc - low_pc,
1953 &sig_type->symt);
1954 di->symt = &subpgm.func->symt;
1955 subpgm.ctx = ctx;
1957 &subpgm.frame, NULL))
1958 {
1959 /* on stack !! */
1960 subpgm.frame.kind = loc_regrel;
1961 subpgm.frame.reg = dbghelp_current_cpu->frame_regno;
1962 subpgm.frame.offset = 0;
1963 }
1965
1966 children = dwarf2_get_di_children(ctx, di);
1967 if (children) for (i = 0; i < vector_length(children); i++)
1968 {
1969 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1970
1971 switch (child->abbrev->tag)
1972 {
1973 case DW_TAG_variable:
1975 dwarf2_parse_variable(&subpgm, NULL, child);
1976 break;
1979 break;
1982 break;
1984 dwarf2_parse_pointer_type(subpgm.ctx, di);
1985 break;
1986 case DW_TAG_const_type:
1987 dwarf2_parse_const_type(subpgm.ctx, di);
1988 break;
1989 case DW_TAG_subprogram:
1990 /* FIXME: likely a declaration (to be checked)
1991 * skip it for now
1992 */
1993 break;
1994 case DW_TAG_label:
1996 break;
1997 case DW_TAG_class_type:
1999 case DW_TAG_union_type:
2001 case DW_TAG_typedef:
2002 /* the type referred to will be loaded when we need it, so skip it */
2003 break;
2010 /* FIXME: no support in dbghelp's internals so far */
2011 break;
2012 default:
2013 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
2014 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2015 }
2016 }
2017
2018 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
2019 {
2021 &subpgm.frame, NULL);
2022 }
2023 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
2024
2025 return di->symt;
2026}
2027
2030{
2031 struct symt* ret_type;
2032 struct symt_function_signature* sig_type;
2033 struct vector* children;
2035 unsigned int i;
2036
2037 if (di->symt) return di->symt;
2038
2039 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2040
2041 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
2042 {
2043 ret_type = ctx->symt_cache[sc_void];
2044 assert(ret_type);
2045 }
2046
2047 /* FIXME: assuming C source code */
2048 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
2049
2050 children = dwarf2_get_di_children(ctx, di);
2051 if (children) for (i = 0; i < vector_length(children); i++)
2052 {
2053 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2054
2055 switch (child->abbrev->tag)
2056 {
2060 break;
2062 WARN("Unsupported unspecified parameters\n");
2063 break;
2064 }
2065 }
2066
2067 return di->symt = &sig_type->symt;
2068}
2069
2072{
2073 struct vector* children;
2075 unsigned int i;
2076
2077 if (di->symt) return;
2078
2079 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2080
2081 di->symt = ctx->symt_cache[sc_void];
2082
2083 children = dwarf2_get_di_children(ctx, di);
2084 if (children) for (i = 0; i < vector_length(children); i++)
2085 {
2086 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2088 }
2089}
2090
2093{
2094 switch (di->abbrev->tag)
2095 {
2096 case DW_TAG_typedef:
2098 break;
2099 case DW_TAG_base_type:
2101 break;
2104 break;
2105 case DW_TAG_class_type:
2107 break;
2110 break;
2111 case DW_TAG_union_type:
2113 break;
2114 case DW_TAG_array_type:
2116 break;
2117 case DW_TAG_const_type:
2119 break;
2122 break;
2125 break;
2128 break;
2131 break;
2132 case DW_TAG_subprogram:
2134 break;
2137 break;
2138 case DW_TAG_variable:
2139 {
2140 dwarf2_subprogram_t subpgm;
2141
2142 subpgm.ctx = ctx;
2143 subpgm.func = NULL;
2144 subpgm.frame.kind = loc_absolute;
2145 subpgm.frame.offset = 0;
2146 subpgm.frame.reg = Wine_DW_no_register;
2147 dwarf2_parse_variable(&subpgm, NULL, di);
2148 }
2149 break;
2150 case DW_TAG_namespace:
2152 break;
2153 /* silence a couple of C++ defines */
2157 break;
2158 default:
2159 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
2161 }
2162}
2163
2165 const struct vector* v, unsigned file, unsigned line)
2166{
2167 struct symt_function* func;
2168 struct symt_ht* symt;
2169 unsigned* psrc;
2170
2171 if (!file || !(psrc = vector_at(v, file - 1))) return;
2172
2173 TRACE("%s %lx %s %u\n",
2175 if (!(symt = symt_find_nearest(module, address)) ||
2176 symt->symt.tag != SymTagFunction) return;
2177 func = (struct symt_function*)symt;
2178 symt_add_func_line(module, func, *psrc, line, address - func->address);
2179}
2180
2183 const char* compile_dir,
2185{
2188 unsigned insn_size, default_stmt;
2189 unsigned line_range, opcode_base;
2190 int line_base;
2191 const unsigned char* opcode_len;
2192 struct vector dirs;
2193 struct vector files;
2194 const char** p;
2195
2196 /* section with line numbers stripped */
2198 return FALSE;
2199
2200 if (offset + 4 > sections[section_line].size)
2201 {
2202 WARN("out of bounds offset\n");
2203 return FALSE;
2204 }
2205 traverse.data = sections[section_line].address + offset;
2206 traverse.end_data = traverse.data + 4;
2207 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2208
2209 length = dwarf2_parse_u4(&traverse);
2210 traverse.end_data = sections[section_line].address + offset + length;
2211
2212 if (offset + 4 + length > sections[section_line].size)
2213 {
2214 WARN("out of bounds header\n");
2215 return FALSE;
2216 }
2217 dwarf2_parse_u2(&traverse); /* version */
2218 dwarf2_parse_u4(&traverse); /* header_len */
2219 insn_size = dwarf2_parse_byte(&traverse);
2220 default_stmt = dwarf2_parse_byte(&traverse);
2221 line_base = (signed char)dwarf2_parse_byte(&traverse);
2222 line_range = dwarf2_parse_byte(&traverse);
2223 opcode_base = dwarf2_parse_byte(&traverse);
2224
2225 opcode_len = traverse.data;
2226 traverse.data += opcode_base - 1;
2227
2228 vector_init(&dirs, sizeof(const char*), 4);
2229 p = vector_add(&dirs, &ctx->pool);
2230 *p = compile_dir ? compile_dir : ".";
2231 while (*traverse.data)
2232 {
2233 const char* rel = (const char*)traverse.data;
2234 unsigned rellen = strlen(rel);
2235 TRACE("Got include %s\n", debugstr_a(rel));
2236 traverse.data += rellen + 1;
2237 p = vector_add(&dirs, &ctx->pool);
2238
2239 if (*rel == '/' || !compile_dir)
2240 *p = rel;
2241 else
2242 {
2243 /* include directory relative to compile directory */
2244 unsigned baselen = strlen(compile_dir);
2245 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
2246 strcpy(tmp, compile_dir);
2247 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2248 strcpy(&tmp[baselen], rel);
2249 *p = tmp;
2250 }
2251
2252 }
2253 traverse.data++;
2254
2255 vector_init(&files, sizeof(unsigned), 16);
2256 while (*traverse.data)
2257 {
2258 unsigned int dir_index, mod_time;
2259 const char* name;
2260 const char* dir;
2261 unsigned* psrc;
2262
2263 name = (const char*)traverse.data;
2264 traverse.data += strlen(name) + 1;
2265 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2266 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2267 length = dwarf2_leb128_as_unsigned(&traverse);
2268 dir = *(const char**)vector_at(&dirs, dir_index);
2269 TRACE("Got file %s/%s (%u,%lu)\n", debugstr_a(dir), debugstr_a(name), mod_time, length);
2270 psrc = vector_add(&files, &ctx->pool);
2271 *psrc = source_new(ctx->module, dir, name);
2272 }
2273 traverse.data++;
2274
2275 while (traverse.data < traverse.end_data)
2276 {
2277 ULONG_PTR address = 0;
2278 unsigned file = 1;
2279 unsigned line = 1;
2280 unsigned is_stmt = default_stmt;
2281 BOOL end_sequence = FALSE;
2282 unsigned opcode, extopcode, i;
2283
2284 while (!end_sequence)
2285 {
2286 opcode = dwarf2_parse_byte(&traverse);
2287 TRACE("Got opcode %x\n", opcode);
2288
2289 if (opcode >= opcode_base)
2290 {
2291 unsigned delta = opcode - opcode_base;
2292
2293 address += (delta / line_range) * insn_size;
2294 line += line_base + (delta % line_range);
2295 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2296 }
2297 else
2298 {
2299 switch (opcode)
2300 {
2301 case DW_LNS_copy:
2302 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2303 break;
2304 case DW_LNS_advance_pc:
2305 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2306 break;
2308 line += dwarf2_leb128_as_signed(&traverse);
2309 break;
2310 case DW_LNS_set_file:
2311 file = dwarf2_leb128_as_unsigned(&traverse);
2312 break;
2313 case DW_LNS_set_column:
2314 dwarf2_leb128_as_unsigned(&traverse);
2315 break;
2316 case DW_LNS_negate_stmt:
2317 is_stmt = !is_stmt;
2318 break;
2320 break;
2322 address += ((255 - opcode_base) / line_range) * insn_size;
2323 break;
2325 address += dwarf2_parse_u2(&traverse);
2326 break;
2327 case DW_LNS_extended_op:
2328 dwarf2_leb128_as_unsigned(&traverse);
2329 extopcode = dwarf2_parse_byte(&traverse);
2330 switch (extopcode)
2331 {
2333 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2334 end_sequence = TRUE;
2335 break;
2336 case DW_LNE_set_address:
2337 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2338 break;
2339 case DW_LNE_define_file:
2340 FIXME("not handled define file %s\n", debugstr_a((char *)traverse.data));
2341 traverse.data += strlen((const char *)traverse.data) + 1;
2342 dwarf2_leb128_as_unsigned(&traverse);
2343 dwarf2_leb128_as_unsigned(&traverse);
2344 dwarf2_leb128_as_unsigned(&traverse);
2345 break;
2347 {
2348 unsigned descr;
2349
2350 descr = dwarf2_leb128_as_unsigned(&traverse);
2351 WARN("not handled discriminator %x\n", descr);
2352 }
2353 break;
2354 default:
2355 FIXME("Unsupported extended opcode %x\n", extopcode);
2356 break;
2357 }
2358 break;
2359 default:
2360 WARN("Unsupported opcode %x\n", opcode);
2361 for (i = 0; i < opcode_len[opcode]; i++)
2362 dwarf2_leb128_as_unsigned(&traverse);
2363 break;
2364 }
2365 }
2366 }
2367 }
2368 return TRUE;
2369}
2370
2372 struct module* module,
2373 const struct elf_thunk_area* thunks,
2375 ULONG_PTR load_offset)
2376{
2378 dwarf2_traverse_context_t abbrev_ctx;
2381 const unsigned char* comp_unit_start = mod_ctx->data;
2382 ULONG_PTR cu_length;
2383 unsigned short cu_version;
2384 ULONG_PTR cu_abbrev_offset;
2385 BOOL ret = FALSE;
2386
2387 cu_length = dwarf2_parse_u4(mod_ctx);
2388 cu_ctx.data = mod_ctx->data;
2389 cu_ctx.end_data = mod_ctx->data + cu_length;
2390 mod_ctx->data += cu_length;
2391 cu_version = dwarf2_parse_u2(&cu_ctx);
2392 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2393 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2394
2395 TRACE("Compilation Unit Header found at 0x%x:\n",
2396 (int)(comp_unit_start - sections[section_debug].address));
2397 TRACE("- length: %lu\n", cu_length);
2398 TRACE("- version: %u\n", cu_version);
2399 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2400 TRACE("- word_size: %u\n", cu_ctx.word_size);
2401
2402 if (cu_version != 2)
2403 {
2404 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2405 cu_version);
2406 return FALSE;
2407 }
2408
2409 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2410 mod_ctx->word_size = cu_ctx.word_size;
2411
2412 pool_init(&ctx.pool, 65536);
2413 ctx.sections = sections;
2414 ctx.section = section_debug;
2415 ctx.module = module;
2416 ctx.thunks = thunks;
2417 ctx.load_offset = load_offset;
2418 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2419 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2420 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2421 ctx.cpp_name = NULL;
2422
2423 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2424 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2425 abbrev_ctx.word_size = cu_ctx.word_size;
2426 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2427
2428 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2429 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di);
2430
2431 if (di->abbrev->tag == DW_TAG_compile_unit)
2432 {
2433 struct attribute name;
2434 struct vector* children;
2436 unsigned int i;
2437 struct attribute stmt_list, low_pc;
2438 struct attribute comp_dir;
2439
2441 name.u.string = NULL;
2442
2443 /* get working directory of current compilation unit */
2444 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2445 comp_dir.u.string = NULL;
2446
2447 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2448 low_pc.u.uvalue = 0;
2449 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue,
2450 source_new(module, comp_dir.u.string, name.u.string));
2451 di->symt = &ctx.compiland->symt;
2452 children = dwarf2_get_di_children(&ctx, di);
2453 if (children) for (i = 0; i < vector_length(children); i++)
2454 {
2455 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2457 }
2458 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2459 {
2460#if defined(__REACTOS__) && defined(__clang__)
2461 unsigned long stmt_list_val = stmt_list.u.uvalue;
2462 if (stmt_list_val > module->module.BaseOfImage)
2463 {
2464 /* FIXME: Clang is recording this as an address, not an offset */
2465 stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva;
2466 }
2467 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val))
2468#else
2469 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2470#endif
2472 }
2473 ret = TRUE;
2474 }
2475 else FIXME("Should have a compilation unit here\n");
2476 pool_destroy(&ctx.pool);
2477 return ret;
2478}
2479
2480static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2482{
2483 DWORD_PTR beg, end;
2484 const BYTE* ptr = start;
2485 DWORD len;
2486
2487 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2488 {
2489 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2490 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2491 if (!beg && !end) break;
2492 len = dwarf2_get_u2(ptr); ptr += 2;
2493
2494 if (beg <= ip && ip < end)
2495 {
2496 lctx->data = ptr;
2497 lctx->end_data = ptr + len;
2498 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2499 return TRUE;
2500 }
2501 ptr += len;
2502 }
2503 WARN("Couldn't find ip in location list\n");
2504 return FALSE;
2505}
2506
2508 const struct module_format* modfmt,
2509 const struct symt_function* func,
2510 DWORD_PTR ip, struct location* frame)
2511{
2512 struct symt** psym = NULL;
2513 struct location* pframe;
2515 enum location_error err;
2516 unsigned int i;
2517
2518 for (i=0; i<vector_length(&func->vchildren); i++)
2519 {
2520 psym = vector_at(&func->vchildren, i);
2521 if ((*psym)->tag == SymTagCustom)
2522 {
2523 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2524
2525 /* First, recompute the frame information, if needed */
2526 switch (pframe->kind)
2527 {
2528 case loc_regrel:
2529 case loc_register:
2530 *frame = *pframe;
2531 break;
2533 WARN("Searching loclist for %s\n", debugstr_a(func->hash_elt.name));
2534 if (!dwarf2_lookup_loclist(modfmt,
2535 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2536 ip, &lctx))
2537 return loc_err_out_of_scope;
2538 if ((err = compute_location(modfmt->module, &lctx, frame, pcs->handle, NULL)) < 0) return err;
2539 if (frame->kind >= loc_user)
2540 {
2541 WARN("Couldn't compute runtime frame location\n");
2542 return loc_err_too_complex;
2543 }
2544 break;
2545 default:
2546 WARN("Unsupported frame kind %d\n", pframe->kind);
2547 return loc_err_internal;
2548 }
2549 return 0;
2550 }
2551 }
2552 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2553 return loc_err_internal;
2554}
2555
2557{
2558 RULE_UNSET, /* not set at all */
2559 RULE_UNDEFINED, /* undefined value */
2560 RULE_SAME, /* same value as previous frame */
2561 RULE_CFA_OFFSET, /* stored at cfa offset */
2562 RULE_OTHER_REG, /* stored in other register */
2563 RULE_EXPRESSION, /* address specified by expression */
2564 RULE_VAL_EXPRESSION /* value specified by expression */
2566
2567/* make it large enough for all CPUs */
2568#define NB_FRAME_REGS 64
2569#define MAX_SAVED_STATES 16
2570
2572{
2574 unsigned char cfa_reg;
2578};
2579
2581{
2585 unsigned char retaddr_reg;
2586 unsigned char fde_encoding;
2587 unsigned char lsda_encoding;
2588 unsigned char signal_frame;
2589 unsigned char aug_z_format;
2590 unsigned char state_sp;
2593};
2594
2596{
2598
2599 if (encoding == DW_EH_PE_omit) return 0;
2600
2601 switch (encoding & 0xf0)
2602 {
2603 case DW_EH_PE_abs:
2604 base = 0;
2605 break;
2606 case DW_EH_PE_pcrel:
2607 base = (ULONG_PTR)ctx->data;
2608 break;
2609 default:
2610 FIXME("unsupported encoding %02x\n", encoding);
2611 return 0;
2612 }
2613
2614 switch (encoding & 0x0f)
2615 {
2616 case DW_EH_PE_native:
2617 return base + dwarf2_parse_addr(ctx);
2618 case DW_EH_PE_leb128:
2620 case DW_EH_PE_data2:
2621 return base + dwarf2_parse_u2(ctx);
2622 case DW_EH_PE_data4:
2623 return base + dwarf2_parse_u4(ctx);
2624 case DW_EH_PE_data8:
2625 return base + dwarf2_parse_u8(ctx);
2629 return base + (signed short)dwarf2_parse_u2(ctx);
2631 return base + (signed int)dwarf2_parse_u4(ctx);
2633 return base + (LONG64)dwarf2_parse_u8(ctx);
2634 default:
2635 FIXME("unsupported encoding %02x\n", encoding);
2636 return 0;
2637 }
2638}
2639
2641{
2642 unsigned char version;
2643 const char* augmentation;
2644 const unsigned char* end;
2645 ULONG_PTR len;
2646
2647 memset(info, 0, sizeof(*info));
2648 info->lsda_encoding = DW_EH_PE_omit;
2649 info->aug_z_format = 0;
2650
2651 /* parse the CIE first */
2653 if (version != 1 && version != 3 && version != 4)
2654 {
2655 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2656 return FALSE;
2657 }
2658 augmentation = (const char*)ctx->data;
2659 ctx->data += strlen(augmentation) + 1;
2660
2661 switch (version)
2662 {
2663 case 4:
2664 /* skip 'address_size' and 'segment_size' */
2665 ctx->data += 2;
2666 /* fallthrough */
2667 case 1:
2668 case 3:
2669 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2670 info->data_align = dwarf2_leb128_as_signed(ctx);
2672 break;
2673 default:
2674 ;
2675 }
2676 info->state.cfa_rule = RULE_CFA_OFFSET;
2677
2678 end = NULL;
2679 TRACE("\tparsing augmentation %s\n", debugstr_a(augmentation));
2680 if (*augmentation) do
2681 {
2682 switch (*augmentation)
2683 {
2684 case 'z':
2686 end = ctx->data + len;
2687 info->aug_z_format = 1;
2688 continue;
2689 case 'L':
2690 info->lsda_encoding = dwarf2_parse_byte(ctx);
2691 continue;
2692 case 'P':
2693 {
2694 unsigned char encoding = dwarf2_parse_byte(ctx);
2695 /* throw away the indirect bit, as we don't care for the result */
2696 encoding &= ~DW_EH_PE_indirect;
2698 continue;
2699 }
2700 case 'R':
2701 info->fde_encoding = dwarf2_parse_byte(ctx);
2702 continue;
2703 case 'S':
2704 info->signal_frame = 1;
2705 continue;
2706 }
2707 FIXME("unknown augmentation '%c'\n", *augmentation);
2708 if (!end) return FALSE;
2709 break;
2710 } while (*++augmentation);
2711 if (end) ctx->data = end;
2712 return TRUE;
2713}
2714
2717 struct frame_info* info, BOOL in_eh_frame)
2718{
2719 const unsigned char* ptr_blk;
2720 const unsigned char* cie_ptr;
2721 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2722 unsigned len, id;
2724 unsigned cie_id;
2725 const BYTE* start_data = fde_ctx->data;
2726
2727 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2728 /* skip 0-padding at beginning of section (alignment) */
2729 while (fde_ctx->data + 2 * 4 < fde_ctx->end_data)
2730 {
2731 if (dwarf2_parse_u4(fde_ctx))
2732 {
2733 fde_ctx->data -= 4;
2734 break;
2735 }
2736 }
2737 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2738 {
2739 /* find the FDE for address addr (skip CIE) */
2740 len = dwarf2_parse_u4(fde_ctx);
2741 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2742 ptr_blk = fde_ctx->data + len;
2743 id = dwarf2_parse_u4(fde_ctx);
2744 if (id == cie_id)
2745 {
2746 last_cie_ptr = fde_ctx->data - 8;
2747 /* we need some bits out of the CIE in order to parse all contents */
2748 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2749 cie_ctx->data = fde_ctx->data;
2750 cie_ctx->end_data = ptr_blk;
2751 cie_ctx->word_size = fde_ctx->word_size;
2752 continue;
2753 }
2754 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2755 if (cie_ptr != last_cie_ptr)
2756 {
2757 last_cie_ptr = cie_ptr;
2758 cie_ctx->data = cie_ptr;
2759 cie_ctx->word_size = fde_ctx->word_size;
2760 cie_ctx->end_data = cie_ptr + 4;
2761 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2762 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2763 {
2764 FIXME("wrong CIE pointer at %x from FDE %x\n",
2765 (unsigned)(cie_ptr - start_data),
2766 (unsigned)(fde_ctx->data - start_data));
2767 return FALSE;
2768 }
2769 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2770 }
2771 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2772 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2773
2774 if (addr >= start && addr < start + range)
2775 {
2776 /* reset the FDE context */
2777 fde_ctx->end_data = ptr_blk;
2778
2779 info->ip = start;
2780 return TRUE;
2781 }
2782 }
2783 return FALSE;
2784}
2785
2787{
2788 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2789 return (reg < NB_FRAME_REGS);
2790}
2791
2793 ULONG_PTR last_ip, struct frame_info *info)
2794{
2795 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame)
2796 {
2798
2799 if (op & 0xc0)
2800 {
2801 switch (op & 0xc0)
2802 {
2803 case DW_CFA_advance_loc:
2804 {
2805 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2806 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2807 info->ip += offset;
2808 break;
2809 }
2810 case DW_CFA_offset:
2811 {
2812 ULONG_PTR reg = op & 0x3f;
2814 if (!valid_reg(reg)) break;
2815 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2816 info->ip,
2817 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)),
2818 offset);
2819 info->state.regs[reg] = offset;
2820 info->state.rules[reg] = RULE_CFA_OFFSET;
2821 break;
2822 }
2823 case DW_CFA_restore:
2824 {
2825 ULONG_PTR reg = op & 0x3f;
2826 if (!valid_reg(reg)) break;
2827 TRACE("%lx: DW_CFA_restore %s\n",
2828 info->ip,
2829 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)));
2830 info->state.rules[reg] = RULE_UNSET;
2831 break;
2832 }
2833 }
2834 }
2835 else switch (op)
2836 {
2837 case DW_CFA_nop:
2838 break;
2839 case DW_CFA_set_loc:
2840 {
2841 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2842 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2843 info->ip = loc;
2844 break;
2845 }
2847 {
2848 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2849 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2850 info->ip += offset;
2851 break;
2852 }
2854 {
2855 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2856 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2857 info->ip += offset;
2858 break;
2859 }
2861 {
2862 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2863 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2864 info->ip += offset;
2865 break;
2866 }
2869 {
2872 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2873 if (!valid_reg(reg)) break;
2874 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2875 info->ip,
2876 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)),
2877 offset);
2878 info->state.regs[reg] = offset;
2879 info->state.rules[reg] = RULE_CFA_OFFSET;
2880 break;
2881 }
2883 {
2885 if (!valid_reg(reg)) break;
2886 TRACE("%lx: DW_CFA_restore_extended %s\n",
2887 info->ip,
2888 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)));
2889 info->state.rules[reg] = RULE_UNSET;
2890 break;
2891 }
2892 case DW_CFA_undefined:
2893 {
2895 if (!valid_reg(reg)) break;
2896 TRACE("%lx: DW_CFA_undefined %s\n",
2897 info->ip,
2898 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)));
2899 info->state.rules[reg] = RULE_UNDEFINED;
2900 break;
2901 }
2902 case DW_CFA_same_value:
2903 {
2905 if (!valid_reg(reg)) break;
2906 TRACE("%lx: DW_CFA_same_value %s\n",
2907 info->ip,
2908 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)));
2909 info->state.regs[reg] = reg;
2910 info->state.rules[reg] = RULE_SAME;
2911 break;
2912 }
2913 case DW_CFA_register:
2914 {
2917 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2918 TRACE("%lx: DW_CFA_register %s == %s\n",
2919 info->ip,
2920 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)),
2921 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, module, TRUE)));
2922 info->state.regs[reg] = reg2;
2923 info->state.rules[reg] = RULE_OTHER_REG;
2924 break;
2925 }
2927 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2928 if (info->state_sp >= MAX_SAVED_STATES)
2929 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2930 else
2931 info->state_stack[info->state_sp++] = info->state;
2932 break;
2934 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2935 if (!info->state_sp)
2936 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2937 else
2938 info->state = info->state_stack[--info->state_sp];
2939 break;
2940 case DW_CFA_def_cfa:
2941 case DW_CFA_def_cfa_sf:
2942 {
2945 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2946 if (!valid_reg(reg)) break;
2947 TRACE("%lx: DW_CFA_def_cfa %s, %ld\n",
2948 info->ip,
2949 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)),
2950 offset);
2951 info->state.cfa_reg = reg;
2952 info->state.cfa_offset = offset;
2953 info->state.cfa_rule = RULE_CFA_OFFSET;
2954 break;
2955 }
2957 {
2959 if (!valid_reg(reg)) break;
2960 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2961 info->ip,
2962 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)));
2963 info->state.cfa_reg = reg;
2964 info->state.cfa_rule = RULE_CFA_OFFSET;
2965 break;
2966 }
2969 {
2971 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2972 TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset);
2973 info->state.cfa_offset = offset;
2974 info->state.cfa_rule = RULE_CFA_OFFSET;
2975 break;
2976 }
2978 {
2979 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2981 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2982 info->state.cfa_offset = expr;
2983 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2984 ctx->data += len;
2985 break;
2986 }
2987 case DW_CFA_expression:
2989 {
2991 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2993 if (!valid_reg(reg)) break;
2994 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2995 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2996 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, module, TRUE)),
2997 expr, expr + len);
2998 info->state.regs[reg] = expr;
3000 ctx->data += len;
3001 break;
3002 }
3004 /* FIXME: should check that GCC is the compiler for this CU */
3005 {
3007 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
3008 /* ignored */
3009 break;
3010 }
3011 default:
3012 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
3013 break;
3014 }
3015 }
3016}
3017
3018/* retrieve a context register from its dwarf number */
3019static DWORD64 get_context_reg(const struct module* module, struct cpu_stack_walk *csw, union ctx *context,
3020 ULONG_PTR dw_reg)
3021{
3022 unsigned regno = csw->cpu->map_dwarf_register(dw_reg, module, TRUE), sz;
3023 void* ptr = csw->cpu->fetch_context_reg(context, regno, &sz);
3024
3025 if (sz == 8)
3026 return *(DWORD64 *)ptr;
3027 else if (sz == 4)
3028 return *(DWORD *)ptr;
3029
3030 FIXME("unhandled size %d\n", sz);
3031 return 0;
3032}
3033
3034/* set a context register from its dwarf number */
3035static void set_context_reg(const struct module* module, struct cpu_stack_walk* csw, union ctx *context,
3036 ULONG_PTR dw_reg, ULONG_PTR val, BOOL isdebuggee)
3037{
3038 unsigned regno = csw->cpu->map_dwarf_register(dw_reg, module, TRUE), sz;
3039 ULONG_PTR* ptr = csw->cpu->fetch_context_reg(context, regno, &sz);
3040
3041 if (isdebuggee)
3042 {
3043 char tmp[16];
3044
3045 if (sz > sizeof(tmp))
3046 {
3047 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
3048 return;
3049 }
3050 if (!sw_read_mem(csw, val, tmp, sz))
3051 {
3052 WARN("Couldn't read memory at %p\n", (void*)val);
3053 return;
3054 }
3055 memcpy(ptr, tmp, sz);
3056 }
3057 else
3058 {
3059 if (sz != sizeof(ULONG_PTR))
3060 {
3061 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
3062 return;
3063 }
3064 *ptr = val;
3065 }
3066}
3067
3068/* copy a register from one context to another using dwarf number */
3069static void copy_context_reg(const struct module* module, struct cpu_stack_walk *csw,
3070 union ctx *dstcontext, ULONG_PTR dwregdst,
3071 union ctx *srccontext, ULONG_PTR dwregsrc)
3072{
3073 unsigned regdstno = csw->cpu->map_dwarf_register(dwregdst, module, TRUE), szdst;
3074 unsigned regsrcno = csw->cpu->map_dwarf_register(dwregsrc, module, TRUE), szsrc;
3075 ULONG_PTR* ptrdst = csw->cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
3076 ULONG_PTR* ptrsrc = csw->cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
3077
3078 if (szdst != szsrc)
3079 {
3080 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
3081 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
3082 return;
3083 }
3084 memcpy(ptrdst, ptrsrc, szdst);
3085}
3086
3087static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
3088 const unsigned char* zp, union ctx *context)
3089{
3091 ULONG_PTR reg, sz, tmp;
3092 DWORD64 stack[64];
3093 int sp = -1;
3094 ULONG_PTR len;
3095
3096 ctx.data = zp;
3097 ctx.end_data = zp + 4;
3099 ctx.end_data = ctx.data + len;
3100 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
3101
3102 while (ctx.data < ctx.end_data)
3103 {
3104 unsigned char opcode = dwarf2_parse_byte(&ctx);
3105
3106 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
3107 stack[++sp] = opcode - DW_OP_lit0;
3108 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
3109 stack[++sp] = get_context_reg(module, csw, context, opcode - DW_OP_reg0);
3110 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
3111 stack[++sp] = get_context_reg(module, csw, context, opcode - DW_OP_breg0)
3113 else switch (opcode)
3114 {
3115 case DW_OP_nop: break;
3116 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
3117 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
3118 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
3119 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
3120 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
3121 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
3122 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
3123 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
3124 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
3126 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
3127 case DW_OP_deref:
3128 tmp = 0;
3129 if (!sw_read_mem(csw, stack[sp], &tmp, ctx.word_size))
3130 {
3131 ERR("Couldn't read memory at %s\n", wine_dbgstr_longlong(stack[sp]));
3132 tmp = 0;
3133 }
3134 stack[sp] = tmp;
3135 break;
3136 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
3137 case DW_OP_drop: sp--; break;
3138 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
3139 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
3140 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
3141 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
3142 case DW_OP_abs: stack[sp] = sizeof(stack[sp]) == 8 ? llabs((INT64)stack[sp]) : abs((INT32)stack[sp]); break;
3143 case DW_OP_neg: stack[sp] = -stack[sp]; break;
3144 case DW_OP_not: stack[sp] = ~stack[sp]; break;
3145 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
3146 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
3147 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
3148 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
3149 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
3150 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
3151 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
3152 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
3154 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
3155 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
3156 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
3157 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
3158 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
3159 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
3160 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
3161 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
3162 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
3163 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
3164 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
3166 tmp = dwarf2_parse_byte(&ctx);
3168 break;
3169 case DW_OP_regx:
3171 break;
3172 case DW_OP_bregx:
3175 stack[++sp] = get_context_reg(module, csw, context, reg) + tmp;
3176 break;
3177 case DW_OP_deref_size:
3178 sz = dwarf2_parse_byte(&ctx);
3179 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
3180 {
3181 ERR("Couldn't read memory at %s\n", wine_dbgstr_longlong(stack[sp]));
3182 tmp = 0;
3183 }
3184 /* do integral promotion */
3185 switch (sz)
3186 {
3187 case 1: stack[sp] = *(unsigned char*)&tmp; break;
3188 case 2: stack[sp] = *(unsigned short*)&tmp; break;
3189 case 4: stack[sp] = *(unsigned int*)&tmp; break;
3190 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
3191 default: FIXME("Unknown size for deref 0x%lx\n", sz);
3192 }
3193 break;
3194 default:
3195 FIXME("unhandled opcode %02x\n", opcode);
3196 }
3197 }
3198 return stack[sp];
3199}
3200
3201static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
3202 union ctx *context, struct frame_state *state, DWORD64 *cfa)
3203{
3204 unsigned int i;
3206 union ctx new_context = *context;
3207
3208 switch (state->cfa_rule)
3209 {
3210 case RULE_EXPRESSION:
3211 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3212 if (!sw_read_mem(csw, *cfa, cfa, csw->cpu->word_size))
3213 {
3214 WARN("Couldn't read memory at %s\n", wine_dbgstr_longlong(*cfa));
3215 return;
3216 }
3217 break;
3219 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3220 break;
3221 default:
3222 *cfa = get_context_reg(module, csw, context, state->cfa_reg) + state->cfa_offset;
3223 break;
3224 }
3225 if (!*cfa) return;
3226
3227 for (i = 0; i < NB_FRAME_REGS; i++)
3228 {
3229 switch (state->rules[i])
3230 {
3231 case RULE_UNSET:
3232 case RULE_UNDEFINED:
3233 case RULE_SAME:
3234 break;
3235 case RULE_CFA_OFFSET:
3236 set_context_reg(module, csw, &new_context, i, *cfa + state->regs[i], TRUE);
3237 break;
3238 case RULE_OTHER_REG:
3239 copy_context_reg(module, csw, &new_context, i, context, state->regs[i]);
3240 break;
3241 case RULE_EXPRESSION:
3242 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3243 set_context_reg(module, csw, &new_context, i, value, TRUE);
3244 break;
3246 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3247 set_context_reg(module, csw, &new_context, i, value, FALSE);
3248 break;
3249 }
3250 }
3251 *context = new_context;
3252}
3253
3254/***********************************************************************
3255 * dwarf2_virtual_unwind
3256 *
3257 */
3259 union ctx *context, DWORD64 *cfa)
3260{
3261 struct module_pair pair;
3262 struct frame_info info;
3263 dwarf2_traverse_context_t cie_ctx, fde_ctx;
3264 struct module_format* modfmt;
3265 const unsigned char* end;
3266 DWORD_PTR delta;
3267
3268 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
3269 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
3271 return FALSE;
3272 modfmt = pair.effective->format_info[DFI_DWARF];
3273 if (!modfmt) return FALSE;
3274 memset(&info, 0, sizeof(info));
3275 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
3276 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
3277 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3278 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
3279 * in this process the IMAGE section at a different address as the one expected by
3280 * the image
3281 */
3282 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
3283 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
3284 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
3285 {
3286 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
3287 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
3288 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3289 delta = pair.effective->reloc_delta;
3290 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
3291 {
3292 TRACE("Couldn't find information for %lx\n", ip);
3293 return FALSE;
3294 }
3295 }
3296
3297 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
3298 ip, info.ip, info.code_align, info.data_align,
3299 csw->cpu->fetch_regname(csw->cpu->map_dwarf_register(info.retaddr_reg, pair.effective, TRUE)));
3300
3301 /* if at very beginning of function, return and use default unwinder */
3302 if (ip == info.ip) return FALSE;
3303 execute_cfa_instructions(pair.effective, &cie_ctx, ip, &info);
3304
3305 if (info.aug_z_format) /* get length of augmentation data */
3306 {
3308 end = fde_ctx.data + len;
3309 }
3310 else end = NULL;
3311 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
3312 if (end) fde_ctx.data = end;
3313
3314 execute_cfa_instructions(pair.effective, &fde_ctx, ip, &info);
3315
3316 /* if there is no information about retaddr, use default unwinder */
3317 if (info.state.rules[info.retaddr_reg] == RULE_UNSET) return FALSE;
3318
3319 apply_frame_state(pair.effective, csw, context, &info.state, cfa);
3320
3321 return TRUE;
3322}
3323
3324static void dwarf2_location_compute(struct process* pcs,
3325 const struct module_format* modfmt,
3326 const struct symt_function* func,
3327 struct location* loc)
3328{
3329 struct location frame;
3330 DWORD_PTR ip;
3331 int err;
3333
3334 if (!func->container || func->container->tag != SymTagCompiland)
3335 {
3336 WARN("We'd expect function %s's container to exist and be a compiland\n", debugstr_a(func->hash_elt.name));
3338 }
3339 else
3340 {
3341 /* instruction pointer relative to compiland's start */
3342 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
3343
3344 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
3345 {
3346 switch (loc->kind)
3347 {
3349 /* Then, if the variable has a location list, find it !! */
3350 if (dwarf2_lookup_loclist(modfmt,
3351 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
3352 ip, &lctx))
3353 goto do_compute;
3355 break;
3356 case loc_dwarf2_block:
3357 /* or if we have a copy of an existing block, get ready for it */
3358 {
3359 unsigned* ptr = (unsigned*)loc->offset;
3360
3361 lctx.data = (const BYTE*)(ptr + 1);
3362 lctx.end_data = lctx.data + *ptr;
3363 lctx.word_size = modfmt->u.dwarf2_info->word_size;
3364 }
3365 do_compute:
3366 /* now get the variable */
3367 err = compute_location(modfmt->module, &lctx, loc, pcs->handle, &frame);
3368 break;
3369 case loc_register:
3370 case loc_regrel:
3371 /* nothing to do */
3372 break;
3373 default:
3374 WARN("Unsupported local kind %d\n", loc->kind);
3376 }
3377 }
3378 }
3379 if (err < 0)
3380 {
3381 loc->kind = loc_register;
3382 loc->reg = err;
3383 }
3384}
3385
3386static void *zalloc(void *priv, uInt items, uInt sz)
3387{
3388 return HeapAlloc(GetProcessHeap(), 0, items * sz);
3389}
3390
3391static void zfree(void *priv, void *addr)
3392{
3394}
3395
3397 const char* zsectname,
3398 struct image_section_map* ism)
3399{
3400 z_stream z;
3402 int res;
3403 BOOL ret = FALSE;
3404
3405 BYTE *addr, *sect = (BYTE *)image_map_section(ism);
3406 size_t sz = image_get_map_size(ism);
3407
3408 if (sz <= 12 || memcmp(sect, "ZLIB", 4))
3409 {
3410 ERR("invalid compressed section %s\n", debugstr_a(zsectname));
3411 goto out;
3412 }
3413
3414#ifdef WORDS_BIGENDIAN
3415 li.u.HighPart = *(DWORD*)&sect[4];
3416 li.u.LowPart = *(DWORD*)&sect[8];
3417#else
3418 li.u.HighPart = RtlUlongByteSwap(*(DWORD*)&sect[4]);
3419 li.u.LowPart = RtlUlongByteSwap(*(DWORD*)&sect[8]);
3420#endif
3421
3423 if (!addr)
3424 goto out;
3425
3426 z.next_in = &sect[12];
3427 z.avail_in = sz - 12;
3428 z.opaque = NULL;
3429 z.zalloc = zalloc;
3430 z.zfree = zfree;
3431
3432 res = inflateInit(&z);
3433 if (res != Z_OK)
3434 {
3435 FIXME("inflateInit failed with %i / %s\n", res, debugstr_a(z.msg));
3436 goto out_free;
3437 }
3438
3439 do {
3440 z.next_out = addr + z.total_out;
3441 z.avail_out = li.QuadPart - z.total_out;
3442 res = inflate(&z, Z_FINISH);
3443 } while (z.avail_in && res == Z_STREAM_END);
3444
3445 if (res != Z_STREAM_END)
3446 {
3447 FIXME("Decompression failed with %i / %s\n", res, debugstr_a(z.msg));
3448 goto out_end;
3449 }
3450
3451 ret = TRUE;
3452 section->compressed = TRUE;
3453 section->address = addr;
3454 section->rva = image_get_map_rva(ism);
3455 section->size = z.total_out;
3456
3457out_end:
3458 inflateEnd(&z);
3459out_free:
3460 if (!ret)
3462out:
3464 return ret;
3465}
3466
3468 const char* sectname, const char* zsectname,
3469 struct image_section_map* ism)
3470{
3471 struct image_section_map local_ism;
3472
3473 if (!ism) ism = &local_ism;
3474
3475 section->compressed = FALSE;
3476 if (image_find_section(fmap, sectname, ism))
3477 {
3478 section->address = (const BYTE*)image_map_section(ism);
3479 section->size = image_get_map_size(ism);
3480 section->rva = image_get_map_rva(ism);
3481 return TRUE;
3482 }
3483
3484 section->address = NULL;
3485 section->size = 0;
3486 section->rva = 0;
3487
3488 if (zsectname && image_find_section(fmap, zsectname, ism))
3489 {
3490 return dwarf2_init_zsection(section, zsectname, ism);
3491 }
3492
3493 return FALSE;
3494}
3495
3497{
3498 if (section->compressed)
3499 HeapFree(GetProcessHeap(), 0, (void*)section->address);
3500}
3501
3502static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3503{
3504 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_loc);
3505 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_frame);
3506 HeapFree(GetProcessHeap(), 0, modfmt);
3507}
3508
3510 const struct elf_thunk_area* thunks,
3511 struct image_file_map* fmap)
3512{
3515 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3516 debug_line_sect, debug_ranges_sect, eh_frame_sect;
3517 BOOL ret = TRUE;
3518 struct module_format* dwarf2_modfmt;
3519
3520 if (!dwarf2_init_section(&eh_frame, fmap, ".eh_frame", NULL, &eh_frame_sect))
3521 /* lld produces .eh_fram to avoid generating a long name */
3522 dwarf2_init_section(&eh_frame, fmap, ".eh_fram", NULL, &eh_frame_sect);
3523 dwarf2_init_section(&section[section_debug], fmap, ".debug_info", ".zdebug_info", &debug_sect);
3524 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", ".zdebug_abbrev", &debug_abbrev_sect);
3525 dwarf2_init_section(&section[section_string], fmap, ".debug_str", ".zdebug_str", &debug_str_sect);
3526 dwarf2_init_section(&section[section_line], fmap, ".debug_line", ".zdebug_line", &debug_line_sect);
3527 dwarf2_init_section(&section[section_ranges], fmap, ".debug_ranges", ".zdebug_ranges", &debug_ranges_sect);
3528
3529 /* to do anything useful we need either .eh_frame or .debug_info */
3530 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) &&
3531 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP))
3532 {
3533 ret = FALSE;
3534 goto leave;
3535 }
3536
3537 if (fmap->modtype == DMT_ELF && debug_sect.fmap)
3538 {
3539 /* debug info might have a different base address than .so file
3540 * when elf file is prelinked after splitting off debug info
3541 * adjust symbol base addresses accordingly
3542 */
3543 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3544 }
3545
3546 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3547
3548 mod_ctx.data = section[section_debug].address;
3549 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3550 mod_ctx.word_size = 0; /* will be correctly set later on */
3551
3552 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3553 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3554 if (!dwarf2_modfmt)
3555 {
3556 ret = FALSE;
3557 goto leave;
3558 }
3559 dwarf2_modfmt->module = module;
3560 dwarf2_modfmt->remove = dwarf2_module_remove;
3561 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3562 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3563 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3564 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3565
3566 /* As we'll need later some sections' content, we won't unmap these
3567 * sections upon existing this function
3568 */
3569 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", ".zdebug_loc", NULL);
3570 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", ".zdebug_frame", NULL);
3571 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame;
3572
3573 while (mod_ctx.data < mod_ctx.end_data)
3574 {
3575 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3576 }
3577 dwarf2_modfmt->module->module.SymType = SymDia;
3578 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3579 /* FIXME: we could have a finer grain here */
3580 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3581 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3582 dwarf2_modfmt->module->module.SourceIndexed =