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dbghelp: When parsing dwarf debug info, silence ptr_to_member and imported_declaratio...
[wine.git] / dlls / dbghelp / dwarf.c
blob776031e51d952021f457c138c22cda627b82a8f0
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2010, Eric Pouech
6 * Copyright (C) 2010, Alexandre Julliard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #define NONAMELESSUNION
24
25 #include "config.h"
26
27 #include <sys/types.h>
28 #include <fcntl.h>
29 #ifdef HAVE_SYS_STAT_H
30 # include <sys/stat.h>
31 #endif
32 #ifdef HAVE_SYS_MMAN_H
33 #include <sys/mman.h>
34 #endif
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #ifdef HAVE_UNISTD_H
39 # include <unistd.h>
40 #endif
41 #include <stdio.h>
42 #ifndef PATH_MAX
43 #define PATH_MAX MAX_PATH
44 #endif
45 #include <assert.h>
46 #include <stdarg.h>
47
48 #include "windef.h"
49 #include "winbase.h"
50 #include "winuser.h"
51 #include "ole2.h"
52 #include "oleauto.h"
53
54 #include "dbghelp_private.h"
55 #include "image_private.h"
56
57 #include "wine/debug.h"
58
59 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
60
61 /* FIXME:
62 * - Functions:
63 * o unspecified parameters
64 * o inlined functions
65 * o Debug{Start|End}Point
66 * o CFA
67 * - Udt
68 * o proper types loading (nesting)
69 */
70
71 #if 0
72 static void dump(const void* ptr, unsigned len)
73 {
74 int i, j;
75 BYTE msg[128];
76 static const char hexof[] = "0123456789abcdef";
77 const BYTE* x = ptr;
78
79 for (i = 0; i < len; i += 16)
80 {
81 sprintf(msg, "%08x: ", i);
82 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
83 for (j = 0; j < min(16, len - i); j++)
84 {
85 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
86 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
87 msg[10 + 3 * j + 2] = ' ';
88 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
89 x[i + j] : '.';
90 }
91 msg[10 + 3 * 16] = ' ';
92 msg[10 + 3 * 16 + 1 + 16] = '\0';
93 TRACE("%s\n", msg);
94 }
95 }
96 #endif
97
98 /**
99 *
100 * Main Specs:
101 * http://www.eagercon.com/dwarf/dwarf3std.htm
102 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
103 *
104 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
105 *
106 * example of projects who do dwarf2 parsing:
107 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
108 * http://elis.ugent.be/diota/log/ltrace_elf.c
109 */
110 #include "dwarf.h"
111
112 /**
113 * Parsers
114 */
115
116 typedef struct dwarf2_abbrev_entry_attr_s
117 {
118 unsigned long attribute;
119 unsigned long form;
120 struct dwarf2_abbrev_entry_attr_s* next;
121 } dwarf2_abbrev_entry_attr_t;
122
123 typedef struct dwarf2_abbrev_entry_s
124 {
125 unsigned long entry_code;
126 unsigned long tag;
127 unsigned char have_child;
128 unsigned num_attr;
129 dwarf2_abbrev_entry_attr_t* attrs;
130 } dwarf2_abbrev_entry_t;
131
132 struct dwarf2_block
133 {
134 unsigned size;
135 const unsigned char* ptr;
136 };
137
138 struct attribute
139 {
140 unsigned long form;
141 union
142 {
143 unsigned long uvalue;
144 ULONGLONG lluvalue;
145 long svalue;
146 const char* string;
147 struct dwarf2_block block;
148 } u;
149 };
150
151 typedef struct dwarf2_debug_info_s
152 {
153 const dwarf2_abbrev_entry_t*abbrev;
154 struct symt* symt;
155 const unsigned char** data;
156 struct vector children;
157 } dwarf2_debug_info_t;
158
159 typedef struct dwarf2_section_s
160 {
161 const unsigned char* address;
162 unsigned size;
163 DWORD_PTR rva;
164 } dwarf2_section_t;
165
166 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max};
167
168 typedef struct dwarf2_traverse_context_s
169 {
170 const unsigned char* data;
171 const unsigned char* end_data;
172 unsigned char word_size;
173 } dwarf2_traverse_context_t;
174
175 /* symt_cache indexes */
176 #define sc_void 0
177 #define sc_int1 1
178 #define sc_int2 2
179 #define sc_int4 3
180 #define sc_num 4
181
182 typedef struct dwarf2_parse_context_s
183 {
184 const dwarf2_section_t* sections;
185 unsigned section;
186 struct pool pool;
187 struct module* module;
188 const struct elf_thunk_area*thunks;
189 struct sparse_array abbrev_table;
190 struct sparse_array debug_info_table;
191 unsigned long load_offset;
192 unsigned long ref_offset;
193 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
194 } dwarf2_parse_context_t;
195
196 /* stored in the dbghelp's module internal structure for later reuse */
197 struct dwarf2_module_info_s
198 {
199 dwarf2_section_t debug_loc;
200 dwarf2_section_t debug_frame;
201 dwarf2_section_t eh_frame;
202 unsigned char word_size;
203 };
204
205 #define loc_dwarf2_location_list (loc_user + 0)
206 #define loc_dwarf2_block (loc_user + 1)
207
208 /* forward declarations */
209 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
210
211 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
212 {
213 return *ptr;
214 }
215
216 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
217 {
218 unsigned char uvalue = dwarf2_get_byte(ctx->data);
219 ctx->data += 1;
220 return uvalue;
221 }
222
223 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
224 {
225 return *(const UINT16*)ptr;
226 }
227
228 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
229 {
230 unsigned short uvalue = dwarf2_get_u2(ctx->data);
231 ctx->data += 2;
232 return uvalue;
233 }
234
235 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
236 {
237 return *(const UINT32*)ptr;
238 }
239
240 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
241 {
242 unsigned long uvalue = dwarf2_get_u4(ctx->data);
243 ctx->data += 4;
244 return uvalue;
245 }
246
247 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
248 {
249 return *(const UINT64*)ptr;
250 }
251
252 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
253 {
254 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
255 ctx->data += 8;
256 return uvalue;
257 }
258
259 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
260 {
261 unsigned long ret = 0;
262 unsigned char byte;
263 unsigned shift = 0;
264
265 do
266 {
267 byte = dwarf2_get_byte(ptr++);
268 ret |= (byte & 0x7f) << shift;
269 shift += 7;
270 } while (byte & 0x80);
271
272 if (end) *end = ptr;
273 return ret;
274 }
275
276 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
277 {
278 unsigned long ret;
279
280 assert(ctx);
281
282 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
283
284 return ret;
285 }
286
287 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
288 {
289 long ret = 0;
290 unsigned char byte;
291 unsigned shift = 0;
292 const unsigned size = sizeof(int) * 8;
293
294 do
295 {
296 byte = dwarf2_get_byte(ptr++);
297 ret |= (byte & 0x7f) << shift;
298 shift += 7;
299 } while (byte & 0x80);
300 if (end) *end = ptr;
301
302 /* as spec: sign bit of byte is 2nd high order bit (80x40)
303 * -> 0x80 is used as flag.
304 */
305 if ((shift < size) && (byte & 0x40))
306 {
307 ret |= - (1 << shift);
308 }
309 return ret;
310 }
311
312 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
313 {
314 long ret = 0;
315
316 assert(ctx);
317
318 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
319 return ret;
320 }
321
322 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
323 {
324 unsigned ret;
325 for (ret = 0; ctx->data[ret] & 0x80; ret++);
326 return ret + 1;
327 }
328
329 /******************************************************************
330 * dwarf2_get_addr
331 *
332 * Returns an address.
333 * We assume that in all cases word size from Dwarf matches the size of
334 * addresses in platform where the exec is compiled.
335 */
336 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
337 {
338 unsigned long ret;
339
340 switch (word_size)
341 {
342 case 4:
343 ret = dwarf2_get_u4(ptr);
344 break;
345 case 8:
346 ret = dwarf2_get_u8(ptr);
347 break;
348 default:
349 FIXME("Unsupported Word Size %u\n", word_size);
350 ret = 0;
351 }
352 return ret;
353 }
354
355 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
356 {
357 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
358 ctx->data += ctx->word_size;
359 return ret;
360 }
361
362 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
363 {
364 return wine_dbg_sprintf("ctx(%p)", ctx->data);
365 }
366
367 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
368 {
369 return wine_dbg_sprintf("ctx(%p,%s)",
370 ctx, debugstr_w(ctx->module->module.ModuleName));
371 }
372
373 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
374 {
375 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
376 di->abbrev, di->symt);
377 }
378
379 static dwarf2_abbrev_entry_t*
380 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
381 unsigned long entry_code)
382 {
383 assert( NULL != abbrev_table );
384 return sparse_array_find(abbrev_table, entry_code);
385 }
386
387 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
388 struct sparse_array* abbrev_table,
389 struct pool* pool)
390 {
391 unsigned long entry_code;
392 dwarf2_abbrev_entry_t* abbrev_entry;
393 dwarf2_abbrev_entry_attr_t* new = NULL;
394 dwarf2_abbrev_entry_attr_t* last = NULL;
395 unsigned long attribute;
396 unsigned long form;
397
398 assert( NULL != abbrev_ctx );
399
400 TRACE("%s, end at %p\n",
401 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
402
403 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
404 while (abbrev_ctx->data < abbrev_ctx->end_data)
405 {
406 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
407 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
408 TRACE("found entry_code %lu\n", entry_code);
409 if (!entry_code)
410 {
411 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
412 break;
413 }
414 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
415 assert( NULL != abbrev_entry );
416
417 abbrev_entry->entry_code = entry_code;
418 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
419 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
420 abbrev_entry->attrs = NULL;
421 abbrev_entry->num_attr = 0;
422
423 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
424 abbrev_table, sparse_array_length(abbrev_table),
425 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
426
427 last = NULL;
428 while (1)
429 {
430 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
431 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
432 if (!attribute) break;
433
434 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
435 assert(new);
436
437 new->attribute = attribute;
438 new->form = form;
439 new->next = NULL;
440 if (abbrev_entry->attrs) last->next = new;
441 else abbrev_entry->attrs = new;
442 last = new;
443 abbrev_entry->num_attr++;
444 }
445 }
446 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
447 }
448
449 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
450 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
451 {
452 unsigned step;
453
454 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
455
456 switch (abbrev_attr->form)
457 {
458 case DW_FORM_ref_addr:
459 case DW_FORM_addr: step = ctx->word_size; break;
460 case DW_FORM_flag:
461 case DW_FORM_data1:
462 case DW_FORM_ref1: step = 1; break;
463 case DW_FORM_data2:
464 case DW_FORM_ref2: step = 2; break;
465 case DW_FORM_data4:
466 case DW_FORM_ref4:
467 case DW_FORM_strp: step = 4; break;
468 case DW_FORM_data8:
469 case DW_FORM_ref8: step = 8; break;
470 case DW_FORM_sdata:
471 case DW_FORM_ref_udata:
472 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
473 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
474 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
475 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
476 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
477 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
478 default:
479 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
480 return;
481 }
482 ctx->data += step;
483 }
484
485 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
486 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
487 const unsigned char* data,
488 struct attribute* attr)
489 {
490 attr->form = abbrev_attr->form;
491 switch (attr->form)
492 {
493 case DW_FORM_ref_addr:
494 case DW_FORM_addr:
495 attr->u.uvalue = dwarf2_get_addr(data,
496 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
497 TRACE("addr<0x%lx>\n", attr->u.uvalue);
498 break;
499
500 case DW_FORM_flag:
501 attr->u.uvalue = dwarf2_get_byte(data);
502 TRACE("flag<0x%lx>\n", attr->u.uvalue);
503 break;
504
505 case DW_FORM_data1:
506 attr->u.uvalue = dwarf2_get_byte(data);
507 TRACE("data1<%lu>\n", attr->u.uvalue);
508 break;
509
510 case DW_FORM_data2:
511 attr->u.uvalue = dwarf2_get_u2(data);
512 TRACE("data2<%lu>\n", attr->u.uvalue);
513 break;
514
515 case DW_FORM_data4:
516 attr->u.uvalue = dwarf2_get_u4(data);
517 TRACE("data4<%lu>\n", attr->u.uvalue);
518 break;
519
520 case DW_FORM_data8:
521 attr->u.lluvalue = dwarf2_get_u8(data);
522 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
523 break;
524
525 case DW_FORM_ref1:
526 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
527 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
528 break;
529
530 case DW_FORM_ref2:
531 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
532 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
533 break;
534
535 case DW_FORM_ref4:
536 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
537 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
538 break;
539
540 case DW_FORM_ref8:
541 FIXME("Unhandled 64 bit support\n");
542 break;
543
544 case DW_FORM_sdata:
545 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
546 break;
547
548 case DW_FORM_ref_udata:
549 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
550 break;
551
552 case DW_FORM_udata:
553 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
554 break;
555
556 case DW_FORM_string:
557 attr->u.string = (const char *)data;
558 TRACE("string<%s>\n", attr->u.string);
559 break;
560
561 case DW_FORM_strp:
562 {
563 unsigned long offset = dwarf2_get_u4(data);
564 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
565 }
566 TRACE("strp<%s>\n", attr->u.string);
567 break;
568
569 case DW_FORM_block:
570 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
571 break;
572
573 case DW_FORM_block1:
574 attr->u.block.size = dwarf2_get_byte(data);
575 attr->u.block.ptr = data + 1;
576 break;
577
578 case DW_FORM_block2:
579 attr->u.block.size = dwarf2_get_u2(data);
580 attr->u.block.ptr = data + 2;
581 break;
582
583 case DW_FORM_block4:
584 attr->u.block.size = dwarf2_get_u4(data);
585 attr->u.block.ptr = data + 4;
586 break;
587
588 default:
589 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
590 break;
591 }
592 }
593
594 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
595 const dwarf2_debug_info_t* di,
596 unsigned at, struct attribute* attr)
597 {
598 unsigned i, ai = 0;
599 dwarf2_abbrev_entry_attr_t* abbrev_attr;
600 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
601
602 while (di)
603 {
604 abstract_abbrev_attr = NULL;
605 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
606 {
607 if (abbrev_attr->attribute == at)
608 {
609 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
610 return TRUE;
611 }
612 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
613 at != DW_AT_sibling)
614 {
615 abstract_abbrev_attr = abbrev_attr;
616 ai = i;
617 }
618 }
619 /* do we have an abstract origin debug entry to look into ? */
620 if (!abstract_abbrev_attr) break;
621 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
622 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
623 FIXME("Should have found the debug info entry\n");
624 }
625 return FALSE;
626 }
627
628 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
629 struct symt_compiland*);
630
631 #define Wine_DW_no_register 0x7FFFFFFF
632
633 static unsigned dwarf2_map_register(int regno)
634 {
635 if (regno == Wine_DW_no_register)
636 {
637 FIXME("What the heck map reg 0x%x\n",regno);
638 return 0;
639 }
640 return dbghelp_current_cpu->map_dwarf_register(regno);
641 }
642
643 static enum location_error
644 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
645 HANDLE hproc, const struct location* frame)
646 {
647 DWORD_PTR tmp, stack[64];
648 unsigned stk;
649 unsigned char op;
650 BOOL piece_found = FALSE;
651
652 stack[stk = 0] = 0;
653
654 loc->kind = loc_absolute;
655 loc->reg = Wine_DW_no_register;
656
657 while (ctx->data < ctx->end_data)
658 {
659 op = dwarf2_parse_byte(ctx);
660
661 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
662 stack[++stk] = op - DW_OP_lit0;
663 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
664 {
665 /* dbghelp APIs don't know how to cope with this anyway
666 * (for example 'long long' stored in two registers)
667 * FIXME: We should tell winedbg how to deal with it (sigh)
668 */
669 if (!piece_found)
670 {
671 if (loc->reg != Wine_DW_no_register)
672 FIXME("Only supporting one reg (%d -> %d)\n",
673 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
674 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
675 }
676 loc->kind = loc_register;
677 }
678 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
679 {
680 /* dbghelp APIs don't know how to cope with this anyway
681 * (for example 'long long' stored in two registers)
682 * FIXME: We should tell winedbg how to deal with it (sigh)
683 */
684 if (!piece_found)
685 {
686 if (loc->reg != Wine_DW_no_register)
687 FIXME("Only supporting one breg (%d -> %d)\n",
688 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
689 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
690 }
691 stack[++stk] = dwarf2_leb128_as_signed(ctx);
692 loc->kind = loc_regrel;
693 }
694 else switch (op)
695 {
696 case DW_OP_nop: break;
697 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
698 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
699 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
700 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
701 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
702 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
703 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
704 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
705 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
706 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
707 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
708 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
709 case DW_OP_drop: stk--; break;
710 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
711 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
712 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
713 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
714 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
715 case DW_OP_neg: stack[stk] = -stack[stk]; break;
716 case DW_OP_not: stack[stk] = ~stack[stk]; break;
717 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
718 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
719 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
720 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
721 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
722 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
723 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
724 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
725 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
726 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
727 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
728 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
729 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
730 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
731 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
732 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
733 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
734 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
735 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
736 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
737 case DW_OP_regx:
738 tmp = dwarf2_leb128_as_unsigned(ctx);
739 if (!piece_found)
740 {
741 if (loc->reg != Wine_DW_no_register)
742 FIXME("Only supporting one reg\n");
743 loc->reg = dwarf2_map_register(tmp);
744 }
745 loc->kind = loc_register;
746 break;
747 case DW_OP_bregx:
748 tmp = dwarf2_leb128_as_unsigned(ctx);
749 if (loc->reg != Wine_DW_no_register)
750 FIXME("Only supporting one regx\n");
751 loc->reg = dwarf2_map_register(tmp);
752 stack[++stk] = dwarf2_leb128_as_signed(ctx);
753 loc->kind = loc_regrel;
754 break;
755 case DW_OP_fbreg:
756 if (loc->reg != Wine_DW_no_register)
757 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
758 if (frame && frame->kind == loc_register)
759 {
760 loc->kind = loc_regrel;
761 loc->reg = frame->reg;
762 stack[++stk] = dwarf2_leb128_as_signed(ctx);
763 }
764 else if (frame && frame->kind == loc_regrel)
765 {
766 loc->kind = loc_regrel;
767 loc->reg = frame->reg;
768 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
769 }
770 else
771 {
772 /* FIXME: this could be later optimized by not recomputing
773 * this very location expression
774 */
775 loc->kind = loc_dwarf2_block;
776 stack[++stk] = dwarf2_leb128_as_signed(ctx);
777 }
778 break;
779 case DW_OP_piece:
780 {
781 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
782 WARN("Not handling OP_piece (size=%d)\n", sz);
783 piece_found = TRUE;
784 }
785 break;
786 case DW_OP_deref:
787 if (!stk)
788 {
789 FIXME("Unexpected empty stack\n");
790 return loc_err_internal;
791 }
792 if (loc->reg != Wine_DW_no_register)
793 {
794 WARN("Too complex expression for deref\n");
795 return loc_err_too_complex;
796 }
797 if (hproc)
798 {
799 DWORD_PTR addr = stack[stk--];
800 DWORD_PTR deref;
801
802 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
803 {
804 WARN("Couldn't read memory at %lx\n", addr);
805 return loc_err_cant_read;
806 }
807 stack[++stk] = deref;
808 }
809 else
810 {
811 loc->kind = loc_dwarf2_block;
812 }
813 break;
814 case DW_OP_deref_size:
815 if (!stk)
816 {
817 FIXME("Unexpected empty stack\n");
818 return loc_err_internal;
819 }
820 if (loc->reg != Wine_DW_no_register)
821 {
822 WARN("Too complex expression for deref\n");
823 return loc_err_too_complex;
824 }
825 if (hproc)
826 {
827 DWORD_PTR addr = stack[stk--];
828 BYTE derefsize = dwarf2_parse_byte(ctx);
829 DWORD64 deref;
830
831 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
832 {
833 WARN("Couldn't read memory at %lx\n", addr);
834 return loc_err_cant_read;
835 }
836
837 switch (derefsize)
838 {
839 case 1: stack[++stk] = *(unsigned char*)&deref; break;
840 case 2: stack[++stk] = *(unsigned short*)&deref; break;
841 case 4: stack[++stk] = *(DWORD*)&deref; break;
842 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
843 }
844 }
845 else
846 {
847 loc->kind = loc_dwarf2_block;
848 }
849 break;
850 case DW_OP_stack_value:
851 /* Expected behaviour is that this is the last instruction of this
852 * expression and just the "top of stack" value should be put to loc->offset. */
853 break;
854 default:
855 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
856 FIXME("Unhandled attr op: %x\n", op);
857 /* FIXME else unhandled extension */
858 return loc_err_internal;
859 }
860 }
861 loc->offset = stack[stk];
862 return 0;
863 }
864
865 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
866 const dwarf2_debug_info_t* di,
867 unsigned long dw,
868 struct location* loc,
869 const struct location* frame)
870 {
871 struct attribute xloc;
872
873 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
874
875 switch (xloc.form)
876 {
877 case DW_FORM_data1: case DW_FORM_data2:
878 case DW_FORM_udata: case DW_FORM_sdata:
879 loc->kind = loc_absolute;
880 loc->reg = 0;
881 loc->offset = xloc.u.uvalue;
882 return TRUE;
883 case DW_FORM_data4: case DW_FORM_data8:
884 loc->kind = loc_dwarf2_location_list;
885 loc->reg = Wine_DW_no_register;
886 loc->offset = xloc.u.uvalue;
887 return TRUE;
888 case DW_FORM_block:
889 case DW_FORM_block1:
890 case DW_FORM_block2:
891 case DW_FORM_block4:
892 break;
893 default: FIXME("Unsupported yet form %lx\n", xloc.form);
894 return FALSE;
895 }
896
897 /* assume we have a block form */
898
899 if (xloc.u.block.size)
900 {
901 dwarf2_traverse_context_t lctx;
902 enum location_error err;
903
904 lctx.data = xloc.u.block.ptr;
905 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
906 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
907
908 err = compute_location(&lctx, loc, NULL, frame);
909 if (err < 0)
910 {
911 loc->kind = loc_error;
912 loc->reg = err;
913 }
914 else if (loc->kind == loc_dwarf2_block)
915 {
916 unsigned* ptr = pool_alloc(&ctx->module->pool,
917 sizeof(unsigned) + xloc.u.block.size);
918 *ptr = xloc.u.block.size;
919 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
920 loc->offset = (unsigned long)ptr;
921 }
922 }
923 return TRUE;
924 }
925
926 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
927 const dwarf2_debug_info_t* di)
928 {
929 struct attribute attr;
930
931 if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
932 {
933 dwarf2_debug_info_t* type;
934
935 type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
936 if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
937 if (!type->symt)
938 {
939 /* load the debug info entity */
940 dwarf2_load_one_entry(ctx, type, NULL);
941 }
942 return type->symt;
943 }
944 return NULL;
945 }
946
947 /******************************************************************
948 * dwarf2_read_range
949 *
950 * read a range for a given debug_info (either using AT_range attribute, in which
951 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
952 * in all cases, range is relative to beginning of compilation unit
953 */
954 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di,
955 unsigned long* plow, unsigned long* phigh)
956 {
957 struct attribute range;
958
959 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range))
960 {
961 dwarf2_traverse_context_t traverse;
962 unsigned long low, high;
963
964 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
965 traverse.end_data = ctx->sections[section_ranges].address +
966 ctx->sections[section_ranges].size;
967 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
968
969 *plow = ULONG_MAX;
970 *phigh = 0;
971 while (traverse.data + 2 * traverse.word_size < traverse.end_data)
972 {
973 low = dwarf2_parse_addr(&traverse);
974 high = dwarf2_parse_addr(&traverse);
975 if (low == 0 && high == 0) break;
976 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
977 if (low < *plow) *plow = low;
978 if (high > *phigh) *phigh = high;
979 }
980 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
981 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
982
983 return TRUE;
984 }
985 else
986 {
987 struct attribute low_pc;
988 struct attribute high_pc;
989
990 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
991 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
992 {
993 FIXME("missing low or high value\n");
994 return FALSE;
995 }
996 *plow = low_pc.u.uvalue;
997 *phigh = high_pc.u.uvalue;
998 return TRUE;
999 }
1000 }
1001
1002 /******************************************************************
1003 * dwarf2_read_one_debug_info
1004 *
1005 * Loads into memory one debug info entry, and recursively its children (if any)
1006 */
1007 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
1008 dwarf2_traverse_context_t* traverse,
1009 dwarf2_debug_info_t** pdi)
1010 {
1011 const dwarf2_abbrev_entry_t*abbrev;
1012 unsigned long entry_code;
1013 unsigned long offset;
1014 dwarf2_debug_info_t* di;
1015 dwarf2_debug_info_t* child;
1016 dwarf2_debug_info_t** where;
1017 dwarf2_abbrev_entry_attr_t* attr;
1018 unsigned i;
1019 struct attribute sibling;
1020
1021 offset = traverse->data - ctx->sections[ctx->section].address;
1022 entry_code = dwarf2_leb128_as_unsigned(traverse);
1023 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
1024 if (!entry_code)
1025 {
1026 *pdi = NULL;
1027 return TRUE;
1028 }
1029 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
1030 if (!abbrev)
1031 {
1032 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
1033 return FALSE;
1034 }
1035 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
1036 if (!di) return FALSE;
1037 di->abbrev = abbrev;
1038 di->symt = NULL;
1039
1040 if (abbrev->num_attr)
1041 {
1042 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
1043 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
1044 {
1045 di->data[i] = traverse->data;
1046 dwarf2_swallow_attribute(traverse, attr);
1047 }
1048 }
1049 else di->data = NULL;
1050 if (abbrev->have_child)
1051 {
1052 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
1053 while (traverse->data < traverse->end_data)
1054 {
1055 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
1056 if (!child) break;
1057 where = vector_add(&di->children, &ctx->pool);
1058 if (!where) return FALSE;
1059 *where = child;
1060 }
1061 }
1062 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1063 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1064 {
1065 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1066 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1067 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1068 }
1069 *pdi = di;
1070 return TRUE;
1071 }
1072
1073 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1074 dwarf2_debug_info_t* di)
1075 {
1076 struct attribute name;
1077 struct attribute size;
1078 struct attribute encoding;
1079 enum BasicType bt;
1080 int cache_idx = -1;
1081 if (di->symt) return di->symt;
1082
1083 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1084
1085 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1086 name.u.string = NULL;
1087 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1088 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1089
1090 switch (encoding.u.uvalue)
1091 {
1092 case DW_ATE_void: bt = btVoid; break;
1093 case DW_ATE_address: bt = btULong; break;
1094 case DW_ATE_boolean: bt = btBool; break;
1095 case DW_ATE_complex_float: bt = btComplex; break;
1096 case DW_ATE_float: bt = btFloat; break;
1097 case DW_ATE_signed: bt = btInt; break;
1098 case DW_ATE_unsigned: bt = btUInt; break;
1099 case DW_ATE_signed_char: bt = btChar; break;
1100 case DW_ATE_unsigned_char: bt = btChar; break;
1101 default: bt = btNoType; break;
1102 }
1103 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1104 switch (bt)
1105 {
1106 case btVoid:
1107 assert(size.u.uvalue == 0);
1108 cache_idx = sc_void;
1109 break;
1110 case btInt:
1111 switch (size.u.uvalue)
1112 {
1113 case 1: cache_idx = sc_int1; break;
1114 case 2: cache_idx = sc_int2; break;
1115 case 4: cache_idx = sc_int4; break;
1116 }
1117 break;
1118 default: break;
1119 }
1120 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1121 ctx->symt_cache[cache_idx] = di->symt;
1122
1123 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1124 return di->symt;
1125 }
1126
1127 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1128 dwarf2_debug_info_t* di)
1129 {
1130 struct symt* ref_type;
1131 struct attribute name;
1132
1133 if (di->symt) return di->symt;
1134
1135 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1136
1137 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1138 ref_type = dwarf2_lookup_type(ctx, di);
1139
1140 if (name.u.string)
1141 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1142 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1143 return di->symt;
1144 }
1145
1146 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1147 dwarf2_debug_info_t* di)
1148 {
1149 struct symt* ref_type;
1150 struct attribute size;
1151
1152 if (di->symt) return di->symt;
1153
1154 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1155
1156 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
1157 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1158 {
1159 ref_type = ctx->symt_cache[sc_void];
1160 assert(ref_type);
1161 }
1162 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
1163 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1164 return di->symt;
1165 }
1166
1167 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1168 dwarf2_debug_info_t* di)
1169 {
1170 struct symt* ref_type;
1171 struct symt* idx_type = NULL;
1172 struct attribute min, max, cnt;
1173 dwarf2_debug_info_t* child;
1174 unsigned int i;
1175
1176 if (di->symt) return di->symt;
1177
1178 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1179
1180 ref_type = dwarf2_lookup_type(ctx, di);
1181
1182 if (!di->abbrev->have_child)
1183 {
1184 /* fake an array with unknown size */
1185 /* FIXME: int4 even on 64bit machines??? */
1186 idx_type = ctx->symt_cache[sc_int4];
1187 min.u.uvalue = 0;
1188 max.u.uvalue = -1;
1189 }
1190 else for (i = 0; i < vector_length(&di->children); i++)
1191 {
1192 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1193 switch (child->abbrev->tag)
1194 {
1195 case DW_TAG_subrange_type:
1196 idx_type = dwarf2_lookup_type(ctx, child);
1197 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1198 min.u.uvalue = 0;
1199 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1200 max.u.uvalue = 0;
1201 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1202 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1203 break;
1204 default:
1205 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1206 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1207 break;
1208 }
1209 }
1210 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1211 return di->symt;
1212 }
1213
1214 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1215 dwarf2_debug_info_t* di)
1216 {
1217 struct symt* ref_type;
1218
1219 if (di->symt) return di->symt;
1220
1221 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1222
1223 ref_type = dwarf2_lookup_type(ctx, di);
1224 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1225 di->symt = ref_type;
1226
1227 return ref_type;
1228 }
1229
1230 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1231 dwarf2_debug_info_t* di)
1232 {
1233 struct symt* ref_type;
1234
1235 if (di->symt) return di->symt;
1236
1237 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1238
1239 ref_type = dwarf2_lookup_type(ctx, di);
1240 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1241 di->symt = ref_type;
1242
1243 return ref_type;
1244 }
1245
1246 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1247 dwarf2_debug_info_t* di)
1248 {
1249 struct symt* ref_type = NULL;
1250
1251 if (di->symt) return di->symt;
1252
1253 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1254
1255 ref_type = dwarf2_lookup_type(ctx, di);
1256 /* FIXME: for now, we hard-wire C++ references to pointers */
1257 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
1258
1259 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1260
1261 return di->symt;
1262 }
1263
1264 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1265 const dwarf2_debug_info_t* di,
1266 struct symt_udt* parent)
1267 {
1268 struct symt* elt_type;
1269 struct attribute name;
1270 struct attribute bit_size;
1271 struct attribute bit_offset;
1272 struct location loc;
1273
1274 assert(parent);
1275
1276 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1277
1278 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1279 elt_type = dwarf2_lookup_type(ctx, di);
1280 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1281 {
1282 if (loc.kind != loc_absolute)
1283 {
1284 FIXME("Found register, while not expecting it\n");
1285 loc.offset = 0;
1286 }
1287 else
1288 TRACE("found member_location at %s -> %lu\n",
1289 dwarf2_debug_ctx(ctx), loc.offset);
1290 }
1291 else
1292 loc.offset = 0;
1293 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1294 bit_size.u.uvalue = 0;
1295 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1296 {
1297 /* FIXME: we should only do this when implementation is LSB (which is
1298 * the case on i386 processors)
1299 */
1300 struct attribute nbytes;
1301 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1302 {
1303 DWORD64 size;
1304 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1305 (unsigned long)size : 0;
1306 }
1307 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1308 }
1309 else bit_offset.u.uvalue = 0;
1310 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1311 (loc.offset << 3) + bit_offset.u.uvalue,
1312 bit_size.u.uvalue);
1313
1314 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1315 }
1316
1317 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1318 dwarf2_debug_info_t* di,
1319 enum UdtKind udt)
1320 {
1321 struct attribute name;
1322 struct attribute size;
1323
1324 if (di->symt) return di->symt;
1325
1326 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1327
1328 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1329 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1330
1331 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1332
1333 if (di->abbrev->have_child) /** any interest to not have child ? */
1334 {
1335 dwarf2_debug_info_t* child;
1336 unsigned int i;
1337
1338 for (i=0; i<vector_length(&di->children); i++)
1339 {
1340 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1341
1342 switch (child->abbrev->tag)
1343 {
1344 case DW_TAG_member:
1345 /* FIXME: should I follow the sibling stuff ?? */
1346 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1347 break;
1348 case DW_TAG_enumeration_type:
1349 dwarf2_parse_enumeration_type(ctx, child);
1350 break;
1351 case DW_TAG_structure_type:
1352 case DW_TAG_class_type:
1353 case DW_TAG_union_type:
1354 case DW_TAG_typedef:
1355 /* FIXME: we need to handle nested udt definitions */
1356 case DW_TAG_inheritance:
1357 case DW_TAG_subprogram:
1358 case DW_TAG_template_type_param:
1359 case DW_TAG_template_value_param:
1360 case DW_TAG_variable:
1361 case DW_TAG_imported_declaration:
1362 case DW_TAG_ptr_to_member_type:
1363 /* FIXME: some C++ related stuff */
1364 break;
1365 default:
1366 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1367 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1368 break;
1369 }
1370 }
1371 }
1372
1373 return di->symt;
1374 }
1375
1376 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1377 const dwarf2_debug_info_t* di,
1378 struct symt_enum* parent)
1379 {
1380 struct attribute name;
1381 struct attribute value;
1382
1383 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1384
1385 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1386 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1387 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1388
1389 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1390 }
1391
1392 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1393 dwarf2_debug_info_t* di)
1394 {
1395 struct attribute name;
1396 struct attribute size;
1397 struct symt_basic* basetype;
1398
1399 if (di->symt) return di->symt;
1400
1401 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1402
1403 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1404 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1405
1406 switch (size.u.uvalue) /* FIXME: that's wrong */
1407 {
1408 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1409 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1410 default:
1411 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1412 }
1413
1414 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1415
1416 if (di->abbrev->have_child) /* any interest to not have child ? */
1417 {
1418 dwarf2_debug_info_t* child;
1419 unsigned int i;
1420
1421 /* FIXME: should we use the sibling stuff ?? */
1422 for (i=0; i<vector_length(&di->children); i++)
1423 {
1424 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1425
1426 switch (child->abbrev->tag)
1427 {
1428 case DW_TAG_enumerator:
1429 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1430 break;
1431 default:
1432 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1433 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1434 }
1435 }
1436 }
1437 return di->symt;
1438 }
1439
1440 /* structure used to pass information around when parsing a subprogram */
1441 typedef struct dwarf2_subprogram_s
1442 {
1443 dwarf2_parse_context_t* ctx;
1444 struct symt_compiland* compiland;
1445 struct symt_function* func;
1446 BOOL non_computed_variable;
1447 struct location frame;
1448 } dwarf2_subprogram_t;
1449
1450 /******************************************************************
1451 * dwarf2_parse_variable
1452 *
1453 * Parses any variable (parameter, local/global variable)
1454 */
1455 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1456 struct symt_block* block,
1457 dwarf2_debug_info_t* di)
1458 {
1459 struct symt* param_type;
1460 struct attribute name, value;
1461 struct location loc;
1462 BOOL is_pmt;
1463
1464 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1465
1466 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1467 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1468
1469 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1470 /* cannot do much without the name, the functions below won't like it. */
1471 return;
1472 }
1473 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1474 &loc, &subpgm->frame))
1475 {
1476 struct attribute ext;
1477
1478 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1479 name.u.string, loc.kind, loc.offset, loc.reg,
1480 dwarf2_debug_ctx(subpgm->ctx));
1481
1482 switch (loc.kind)
1483 {
1484 case loc_error:
1485 break;
1486 case loc_absolute:
1487 /* it's a global variable */
1488 /* FIXME: we don't handle its scope yet */
1489 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1490 ext.u.uvalue = 0;
1491 loc.offset += subpgm->ctx->load_offset;
1492 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1493 name.u.string, !ext.u.uvalue,
1494 loc, 0, param_type);
1495 break;
1496 default:
1497 subpgm->non_computed_variable = TRUE;
1498 /* fall through */
1499 case loc_register:
1500 case loc_regrel:
1501 /* either a pmt/variable relative to frame pointer or
1502 * pmt/variable in a register
1503 */
1504 assert(subpgm->func);
1505 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1506 is_pmt ? DataIsParam : DataIsLocal,
1507 &loc, block, param_type, name.u.string);
1508 break;
1509 }
1510 }
1511 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1512 {
1513 VARIANT v;
1514 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1515 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1516 switch (value.form)
1517 {
1518 case DW_FORM_data1:
1519 case DW_FORM_data2:
1520 case DW_FORM_data4:
1521 case DW_FORM_udata:
1522 case DW_FORM_addr:
1523 v.n1.n2.vt = VT_UI4;
1524 v.n1.n2.n3.lVal = value.u.uvalue;
1525 break;
1526
1527 case DW_FORM_data8:
1528 v.n1.n2.vt = VT_UI8;
1529 v.n1.n2.n3.llVal = value.u.lluvalue;
1530 break;
1531
1532 case DW_FORM_sdata:
1533 v.n1.n2.vt = VT_I4;
1534 v.n1.n2.n3.lVal = value.u.svalue;
1535 break;
1536
1537 case DW_FORM_strp:
1538 case DW_FORM_string:
1539 /* FIXME: native doesn't report const strings from here !!
1540 * however, the value of the string is in the code somewhere
1541 */
1542 v.n1.n2.vt = VT_I1 | VT_BYREF;
1543 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1544 break;
1545
1546 case DW_FORM_block:
1547 case DW_FORM_block1:
1548 case DW_FORM_block2:
1549 case DW_FORM_block4:
1550 v.n1.n2.vt = VT_I4;
1551 switch (value.u.block.size)
1552 {
1553 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1554 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1555 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1556 default:
1557 v.n1.n2.vt = VT_I1 | VT_BYREF;
1558 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1559 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1560 }
1561 break;
1562
1563 default:
1564 FIXME("Unsupported form for const value %s (%lx)\n",
1565 name.u.string, value.form);
1566 v.n1.n2.vt = VT_EMPTY;
1567 }
1568 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1569 name.u.string, param_type, &v)->symt;
1570 }
1571 else
1572 {
1573 /* variable has been optimiezd away... report anyway */
1574 loc.kind = loc_error;
1575 loc.reg = loc_err_no_location;
1576 if (subpgm->func)
1577 {
1578 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1579 is_pmt ? DataIsParam : DataIsLocal,
1580 &loc, block, param_type, name.u.string);
1581 }
1582 else
1583 {
1584 WARN("dropping global variable %s which has been optimized away\n", name.u.string);
1585 }
1586 }
1587 if (is_pmt && subpgm->func && subpgm->func->type)
1588 symt_add_function_signature_parameter(subpgm->ctx->module,
1589 (struct symt_function_signature*)subpgm->func->type,
1590 param_type);
1591
1592 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1593 }
1594
1595 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1596 const dwarf2_debug_info_t* di)
1597 {
1598 struct attribute name;
1599 struct attribute low_pc;
1600 struct location loc;
1601
1602 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1603
1604 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1605 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1606 name.u.string = NULL;
1607
1608 loc.kind = loc_absolute;
1609 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1610 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1611 &loc, name.u.string);
1612 }
1613
1614 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1615 struct symt_block* parent_block,
1616 const dwarf2_debug_info_t* di);
1617
1618 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1619 struct symt_block* parent_block,
1620 const dwarf2_debug_info_t* di)
1621 {
1622 struct symt_block* block;
1623 unsigned long low_pc, high_pc;
1624
1625 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1626
1627 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1628 {
1629 FIXME("cannot read range\n");
1630 return;
1631 }
1632
1633 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1634 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1635 high_pc - low_pc);
1636
1637 if (di->abbrev->have_child) /** any interest to not have child ? */
1638 {
1639 dwarf2_debug_info_t* child;
1640 unsigned int i;
1641
1642 for (i=0; i<vector_length(&di->children); i++)
1643 {
1644 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1645
1646 switch (child->abbrev->tag)
1647 {
1648 case DW_TAG_formal_parameter:
1649 case DW_TAG_variable:
1650 dwarf2_parse_variable(subpgm, block, child);
1651 break;
1652 case DW_TAG_lexical_block:
1653 dwarf2_parse_subprogram_block(subpgm, block, child);
1654 break;
1655 case DW_TAG_inlined_subroutine:
1656 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1657 break;
1658 case DW_TAG_label:
1659 dwarf2_parse_subprogram_label(subpgm, child);
1660 break;
1661 default:
1662 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1663 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1664 dwarf2_debug_di(di));
1665 }
1666 }
1667 }
1668 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1669 }
1670
1671 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1672 struct symt_block* parent_block,
1673 const dwarf2_debug_info_t* di)
1674 {
1675 struct symt_block* block;
1676 unsigned long low_pc, high_pc;
1677
1678 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1679
1680 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1681 {
1682 FIXME("no range\n");
1683 return;
1684 }
1685
1686 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1687 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1688 high_pc - low_pc);
1689
1690 if (di->abbrev->have_child) /** any interest to not have child ? */
1691 {
1692 dwarf2_debug_info_t* child;
1693 unsigned int i;
1694
1695 for (i=0; i<vector_length(&di->children); i++)
1696 {
1697 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1698
1699 switch (child->abbrev->tag)
1700 {
1701 case DW_TAG_inlined_subroutine:
1702 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1703 break;
1704 case DW_TAG_variable:
1705 dwarf2_parse_variable(subpgm, block, child);
1706 break;
1707 case DW_TAG_lexical_block:
1708 dwarf2_parse_subprogram_block(subpgm, block, child);
1709 break;
1710 case DW_TAG_subprogram:
1711 /* FIXME: likely a declaration (to be checked)
1712 * skip it for now
1713 */
1714 break;
1715 case DW_TAG_formal_parameter:
1716 /* FIXME: likely elements for exception handling (GCC flavor)
1717 * Skip it for now
1718 */
1719 break;
1720 case DW_TAG_imported_module:
1721 /* C++ stuff to be silenced (for now) */
1722 break;
1723 case DW_TAG_label:
1724 dwarf2_parse_subprogram_label(subpgm, child);
1725 break;
1726 case DW_TAG_class_type:
1727 case DW_TAG_structure_type:
1728 case DW_TAG_union_type:
1729 case DW_TAG_enumeration_type:
1730 case DW_TAG_typedef:
1731 /* the type referred to will be loaded when we need it, so skip it */
1732 break;
1733 default:
1734 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1735 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1736 }
1737 }
1738 }
1739
1740 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1741 }
1742
1743 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1744 dwarf2_debug_info_t* di,
1745 struct symt_compiland* compiland)
1746 {
1747 struct attribute name;
1748 unsigned long low_pc, high_pc;
1749 struct attribute is_decl;
1750 struct attribute inline_flags;
1751 struct symt* ret_type;
1752 struct symt_function_signature* sig_type;
1753 dwarf2_subprogram_t subpgm;
1754
1755 if (di->symt) return di->symt;
1756
1757 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1758
1759 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1760 {
1761 WARN("No name for function... dropping function\n");
1762 return NULL;
1763 }
1764 /* if it's an abstract representation of an inline function, there should be
1765 * a concrete object that we'll handle
1766 */
1767 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1768 {
1769 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1770 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1771 return NULL;
1772 }
1773
1774 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
1775 {
1776 FIXME("cannot get range\n");
1777 return NULL;
1778 }
1779
1780 /* As functions (defined as inline assembly) get debug info with dwarf
1781 * (not the case for stabs), we just drop Wine's thunks here...
1782 * Actual thunks will be created in elf_module from the symbol table
1783 */
1784 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
1785 return NULL;
1786 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1787 is_decl.u.uvalue = 0;
1788
1789 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1790 {
1791 ret_type = ctx->symt_cache[sc_void];
1792 assert(ret_type);
1793 }
1794
1795 /* FIXME: assuming C source code */
1796 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1797 if (!is_decl.u.uvalue)
1798 {
1799 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1800 ctx->load_offset + low_pc, high_pc - low_pc,
1801 &sig_type->symt);
1802 di->symt = &subpgm.func->symt;
1803 }
1804 else subpgm.func = NULL;
1805
1806 subpgm.ctx = ctx;
1807 subpgm.compiland = compiland;
1808 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1809 &subpgm.frame, NULL))
1810 {
1811 /* on stack !! */
1812 subpgm.frame.kind = loc_regrel;
1813 subpgm.frame.reg = 0;
1814 subpgm.frame.offset = 0;
1815 }
1816 subpgm.non_computed_variable = FALSE;
1817
1818 if (di->abbrev->have_child) /** any interest to not have child ? */
1819 {
1820 dwarf2_debug_info_t* child;
1821 unsigned int i;
1822
1823 for (i=0; i<vector_length(&di->children); i++)
1824 {
1825 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1826
1827 switch (child->abbrev->tag)
1828 {
1829 case DW_TAG_variable:
1830 case DW_TAG_formal_parameter:
1831 dwarf2_parse_variable(&subpgm, NULL, child);
1832 break;
1833 case DW_TAG_lexical_block:
1834 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1835 break;
1836 case DW_TAG_inlined_subroutine:
1837 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1838 break;
1839 case DW_TAG_subprogram:
1840 /* FIXME: likely a declaration (to be checked)
1841 * skip it for now
1842 */
1843 break;
1844 case DW_TAG_label:
1845 dwarf2_parse_subprogram_label(&subpgm, child);
1846 break;
1847 case DW_TAG_class_type:
1848 case DW_TAG_structure_type:
1849 case DW_TAG_union_type:
1850 case DW_TAG_enumeration_type:
1851 case DW_TAG_typedef:
1852 /* the type referred to will be loaded when we need it, so skip it */
1853 break;
1854 case DW_TAG_unspecified_parameters:
1855 case DW_TAG_template_type_param:
1856 case DW_TAG_template_value_param:
1857 /* FIXME: no support in dbghelp's internals so far */
1858 break;
1859 default:
1860 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1861 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1862 }
1863 }
1864 }
1865
1866 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1867 {
1868 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1869 &subpgm.frame, NULL);
1870 }
1871 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1872
1873 return di->symt;
1874 }
1875
1876 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1877 dwarf2_debug_info_t* di)
1878 {
1879 struct symt* ret_type;
1880 struct symt_function_signature* sig_type;
1881
1882 if (di->symt) return di->symt;
1883
1884 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1885
1886 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1887 {
1888 ret_type = ctx->symt_cache[sc_void];
1889 assert(ret_type);
1890 }
1891
1892 /* FIXME: assuming C source code */
1893 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1894
1895 if (di->abbrev->have_child) /** any interest to not have child ? */
1896 {
1897 dwarf2_debug_info_t* child;
1898 unsigned int i;
1899
1900 for (i=0; i<vector_length(&di->children); i++)
1901 {
1902 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1903
1904 switch (child->abbrev->tag)
1905 {
1906 case DW_TAG_formal_parameter:
1907 symt_add_function_signature_parameter(ctx->module, sig_type,
1908 dwarf2_lookup_type(ctx, child));
1909 break;
1910 case DW_TAG_unspecified_parameters:
1911 WARN("Unsupported unspecified parameters\n");
1912 break;
1913 }
1914 }
1915 }
1916
1917 return di->symt = &sig_type->symt;
1918 }
1919
1920 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1921 dwarf2_debug_info_t* di,
1922 struct symt_compiland* compiland)
1923 {
1924 switch (di->abbrev->tag)
1925 {
1926 case DW_TAG_typedef:
1927 dwarf2_parse_typedef(ctx, di);
1928 break;
1929 case DW_TAG_base_type:
1930 dwarf2_parse_base_type(ctx, di);
1931 break;
1932 case DW_TAG_pointer_type:
1933 dwarf2_parse_pointer_type(ctx, di);
1934 break;
1935 case DW_TAG_class_type:
1936 dwarf2_parse_udt_type(ctx, di, UdtClass);
1937 break;
1938 case DW_TAG_structure_type:
1939 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1940 break;
1941 case DW_TAG_union_type:
1942 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1943 break;
1944 case DW_TAG_array_type:
1945 dwarf2_parse_array_type(ctx, di);
1946 break;
1947 case DW_TAG_const_type:
1948 dwarf2_parse_const_type(ctx, di);
1949 break;
1950 case DW_TAG_volatile_type:
1951 dwarf2_parse_volatile_type(ctx, di);
1952 break;
1953 case DW_TAG_reference_type:
1954 dwarf2_parse_reference_type(ctx, di);
1955 break;
1956 case DW_TAG_enumeration_type:
1957 dwarf2_parse_enumeration_type(ctx, di);
1958 break;
1959 case DW_TAG_subprogram:
1960 dwarf2_parse_subprogram(ctx, di, compiland);
1961 break;
1962 case DW_TAG_subroutine_type:
1963 dwarf2_parse_subroutine_type(ctx, di);
1964 break;
1965 case DW_TAG_variable:
1966 {
1967 dwarf2_subprogram_t subpgm;
1968
1969 subpgm.ctx = ctx;
1970 subpgm.compiland = compiland;
1971 subpgm.func = NULL;
1972 subpgm.frame.kind = loc_absolute;
1973 subpgm.frame.offset = 0;
1974 subpgm.frame.reg = Wine_DW_no_register;
1975 dwarf2_parse_variable(&subpgm, NULL, di);
1976 }
1977 break;
1978 /* silence a couple of C++ defines */
1979 case DW_TAG_namespace:
1980 case DW_TAG_imported_module:
1981 case DW_TAG_imported_declaration:
1982 case DW_TAG_ptr_to_member_type:
1983 break;
1984 default:
1985 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1986 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1987 }
1988 }
1989
1990 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1991 const struct vector* v, unsigned file, unsigned line)
1992 {
1993 struct symt_function* func;
1994 struct symt_ht* symt;
1995 unsigned* psrc;
1996
1997 if (!file || !(psrc = vector_at(v, file - 1))) return;
1998
1999 TRACE("%s %lx %s %u\n",
2000 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
2001 if (!(symt = symt_find_nearest(module, address)) ||
2002 symt->symt.tag != SymTagFunction) return;
2003 func = (struct symt_function*)symt;
2004 symt_add_func_line(module, func, *psrc, line, address - func->address);
2005 }
2006
2007 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
2008 dwarf2_parse_context_t* ctx,
2009 const char* compile_dir,
2010 unsigned long offset)
2011 {
2012 dwarf2_traverse_context_t traverse;
2013 unsigned long length;
2014 unsigned version, header_len, insn_size, default_stmt;
2015 unsigned line_range, opcode_base;
2016 int line_base;
2017 const unsigned char* opcode_len;
2018 struct vector dirs;
2019 struct vector files;
2020 const char** p;
2021
2022 /* section with line numbers stripped */
2023 if (sections[section_line].address == IMAGE_NO_MAP)
2024 return FALSE;
2025
2026 traverse.data = sections[section_line].address + offset;
2027 traverse.end_data = traverse.data + 4;
2028 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2029
2030 length = dwarf2_parse_u4(&traverse);
2031 traverse.end_data = sections[section_line].address + offset + length;
2032
2033 version = dwarf2_parse_u2(&traverse);
2034 header_len = dwarf2_parse_u4(&traverse);
2035 insn_size = dwarf2_parse_byte(&traverse);
2036 default_stmt = dwarf2_parse_byte(&traverse);
2037 line_base = (signed char)dwarf2_parse_byte(&traverse);
2038 line_range = dwarf2_parse_byte(&traverse);
2039 opcode_base = dwarf2_parse_byte(&traverse);
2040
2041 opcode_len = traverse.data;
2042 traverse.data += opcode_base - 1;
2043
2044 vector_init(&dirs, sizeof(const char*), 4);
2045 p = vector_add(&dirs, &ctx->pool);
2046 *p = compile_dir ? compile_dir : ".";
2047 while (*traverse.data)
2048 {
2049 const char* rel = (const char*)traverse.data;
2050 unsigned rellen = strlen(rel);
2051 TRACE("Got include %s\n", rel);
2052 traverse.data += rellen + 1;
2053 p = vector_add(&dirs, &ctx->pool);
2054
2055 if (*rel == '/' || !compile_dir)
2056 *p = rel;
2057 else
2058 {
2059 /* include directory relative to compile directory */
2060 unsigned baselen = strlen(compile_dir);
2061 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
2062 strcpy(tmp, compile_dir);
2063 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2064 strcpy(&tmp[baselen], rel);
2065 *p = tmp;
2066 }
2067
2068 }
2069 traverse.data++;
2070
2071 vector_init(&files, sizeof(unsigned), 16);
2072 while (*traverse.data)
2073 {
2074 unsigned int dir_index, mod_time, length;
2075 const char* name;
2076 const char* dir;
2077 unsigned* psrc;
2078
2079 name = (const char*)traverse.data;
2080 traverse.data += strlen(name) + 1;
2081 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2082 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2083 length = dwarf2_leb128_as_unsigned(&traverse);
2084 dir = *(const char**)vector_at(&dirs, dir_index);
2085 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
2086 psrc = vector_add(&files, &ctx->pool);
2087 *psrc = source_new(ctx->module, dir, name);
2088 }
2089 traverse.data++;
2090
2091 while (traverse.data < traverse.end_data)
2092 {
2093 unsigned long address = 0;
2094 unsigned file = 1;
2095 unsigned line = 1;
2096 unsigned is_stmt = default_stmt;
2097 BOOL end_sequence = FALSE;
2098 unsigned opcode, extopcode, i;
2099
2100 while (!end_sequence)
2101 {
2102 opcode = dwarf2_parse_byte(&traverse);
2103 TRACE("Got opcode %x\n", opcode);
2104
2105 if (opcode >= opcode_base)
2106 {
2107 unsigned delta = opcode - opcode_base;
2108
2109 address += (delta / line_range) * insn_size;
2110 line += line_base + (delta % line_range);
2111 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2112 }
2113 else
2114 {
2115 switch (opcode)
2116 {
2117 case DW_LNS_copy:
2118 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2119 break;
2120 case DW_LNS_advance_pc:
2121 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2122 break;
2123 case DW_LNS_advance_line:
2124 line += dwarf2_leb128_as_signed(&traverse);
2125 break;
2126 case DW_LNS_set_file:
2127 file = dwarf2_leb128_as_unsigned(&traverse);
2128 break;
2129 case DW_LNS_set_column:
2130 dwarf2_leb128_as_unsigned(&traverse);
2131 break;
2132 case DW_LNS_negate_stmt:
2133 is_stmt = !is_stmt;
2134 break;
2135 case DW_LNS_set_basic_block:
2136 break;
2137 case DW_LNS_const_add_pc:
2138 address += ((255 - opcode_base) / line_range) * insn_size;
2139 break;
2140 case DW_LNS_fixed_advance_pc:
2141 address += dwarf2_parse_u2(&traverse);
2142 break;
2143 case DW_LNS_extended_op:
2144 dwarf2_leb128_as_unsigned(&traverse);
2145 extopcode = dwarf2_parse_byte(&traverse);
2146 switch (extopcode)
2147 {
2148 case DW_LNE_end_sequence:
2149 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2150 end_sequence = TRUE;
2151 break;
2152 case DW_LNE_set_address:
2153 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2154 break;
2155 case DW_LNE_define_file:
2156 FIXME("not handled %s\n", traverse.data);
2157 traverse.data += strlen((const char *)traverse.data) + 1;
2158 dwarf2_leb128_as_unsigned(&traverse);
2159 dwarf2_leb128_as_unsigned(&traverse);
2160 dwarf2_leb128_as_unsigned(&traverse);
2161 break;
2162 case DW_LNE_set_discriminator:
2163 WARN("not handled %s\n", traverse.data);
2164 dwarf2_leb128_as_unsigned(&traverse);
2165 break;
2166 default:
2167 FIXME("Unsupported extended opcode %x\n", extopcode);
2168 break;
2169 }
2170 break;
2171 default:
2172 WARN("Unsupported opcode %x\n", opcode);
2173 for (i = 0; i < opcode_len[opcode]; i++)
2174 dwarf2_leb128_as_unsigned(&traverse);
2175 break;
2176 }
2177 }
2178 }
2179 }
2180 return TRUE;
2181 }
2182
2183 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2184 struct module* module,
2185 const struct elf_thunk_area* thunks,
2186 dwarf2_traverse_context_t* mod_ctx,
2187 unsigned long load_offset)
2188 {
2189 dwarf2_parse_context_t ctx;
2190 dwarf2_traverse_context_t abbrev_ctx;
2191 dwarf2_debug_info_t* di;
2192 dwarf2_traverse_context_t cu_ctx;
2193 const unsigned char* comp_unit_start = mod_ctx->data;
2194 unsigned long cu_length;
2195 unsigned short cu_version;
2196 unsigned long cu_abbrev_offset;
2197 BOOL ret = FALSE;
2198
2199 cu_length = dwarf2_parse_u4(mod_ctx);
2200 cu_ctx.data = mod_ctx->data;
2201 cu_ctx.end_data = mod_ctx->data + cu_length;
2202 mod_ctx->data += cu_length;
2203 cu_version = dwarf2_parse_u2(&cu_ctx);
2204 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2205 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2206
2207 TRACE("Compilation Unit Header found at 0x%x:\n",
2208 (int)(comp_unit_start - sections[section_debug].address));
2209 TRACE("- length: %lu\n", cu_length);
2210 TRACE("- version: %u\n", cu_version);
2211 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2212 TRACE("- word_size: %u\n", cu_ctx.word_size);
2213
2214 if (cu_version != 2)
2215 {
2216 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2217 cu_version);
2218 return FALSE;
2219 }
2220
2221 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2222 mod_ctx->word_size = cu_ctx.word_size;
2223
2224 pool_init(&ctx.pool, 65536);
2225 ctx.sections = sections;
2226 ctx.section = section_debug;
2227 ctx.module = module;
2228 ctx.thunks = thunks;
2229 ctx.load_offset = load_offset;
2230 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2231 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2232 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2233
2234 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2235 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2236 abbrev_ctx.word_size = cu_ctx.word_size;
2237 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2238
2239 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2240 dwarf2_read_one_debug_info(&ctx, &cu_ctx, &di);
2241
2242 if (di->abbrev->tag == DW_TAG_compile_unit)
2243 {
2244 struct attribute name;
2245 dwarf2_debug_info_t** pdi = NULL;
2246 struct attribute stmt_list, low_pc;
2247 struct attribute comp_dir;
2248
2249 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2250 name.u.string = NULL;
2251
2252 /* get working directory of current compilation unit */
2253 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2254 comp_dir.u.string = NULL;
2255
2256 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2257 low_pc.u.uvalue = 0;
2258 di->symt = &symt_new_compiland(module,
2259 ctx.load_offset + low_pc.u.uvalue,
2260 source_new(module, comp_dir.u.string, name.u.string))->symt;
2261
2262 if (di->abbrev->have_child)
2263 {
2264 unsigned int i;
2265 for (i=0; i<vector_length(&di->children); i++)
2266 {
2267 pdi = vector_at(&di->children, i);
2268 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2269 }
2270 }
2271 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2272 {
2273 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2274 module->module.LineNumbers = TRUE;
2275 }
2276 ret = TRUE;
2277 }
2278 else FIXME("Should have a compilation unit here\n");
2279 pool_destroy(&ctx.pool);
2280 return ret;
2281 }
2282
2283 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2284 unsigned long ip, dwarf2_traverse_context_t* lctx)
2285 {
2286 DWORD_PTR beg, end;
2287 const BYTE* ptr = start;
2288 DWORD len;
2289
2290 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2291 {
2292 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2293 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2294 if (!beg && !end) break;
2295 len = dwarf2_get_u2(ptr); ptr += 2;
2296
2297 if (beg <= ip && ip < end)
2298 {
2299 lctx->data = ptr;
2300 lctx->end_data = ptr + len;
2301 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2302 return TRUE;
2303 }
2304 ptr += len;
2305 }
2306 WARN("Couldn't find ip in location list\n");
2307 return FALSE;
2308 }
2309
2310 static enum location_error loc_compute_frame(struct process* pcs,
2311 const struct module_format* modfmt,
2312 const struct symt_function* func,
2313 DWORD_PTR ip, struct location* frame)
2314 {
2315 struct symt** psym = NULL;
2316 struct location* pframe;
2317 dwarf2_traverse_context_t lctx;
2318 enum location_error err;
2319 unsigned int i;
2320
2321 for (i=0; i<vector_length(&func->vchildren); i++)
2322 {
2323 psym = vector_at(&func->vchildren, i);
2324 if ((*psym)->tag == SymTagCustom)
2325 {
2326 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2327
2328 /* First, recompute the frame information, if needed */
2329 switch (pframe->kind)
2330 {
2331 case loc_regrel:
2332 case loc_register:
2333 *frame = *pframe;
2334 break;
2335 case loc_dwarf2_location_list:
2336 WARN("Searching loclist for %s\n", func->hash_elt.name);
2337 if (!dwarf2_lookup_loclist(modfmt,
2338 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2339 ip, &lctx))
2340 return loc_err_out_of_scope;
2341 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2342 if (frame->kind >= loc_user)
2343 {
2344 WARN("Couldn't compute runtime frame location\n");
2345 return loc_err_too_complex;
2346 }
2347 break;
2348 default:
2349 WARN("Unsupported frame kind %d\n", pframe->kind);
2350 return loc_err_internal;
2351 }
2352 return 0;
2353 }
2354 }
2355 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2356 return loc_err_internal;
2357 }
2358
2359 enum reg_rule
2360 {
2361 RULE_UNSET, /* not set at all */
2362 RULE_UNDEFINED, /* undefined value */
2363 RULE_SAME, /* same value as previous frame */
2364 RULE_CFA_OFFSET, /* stored at cfa offset */
2365 RULE_OTHER_REG, /* stored in other register */
2366 RULE_EXPRESSION, /* address specified by expression */
2367 RULE_VAL_EXPRESSION /* value specified by expression */
2368 };
2369
2370 /* make it large enough for all CPUs */
2371 #define NB_FRAME_REGS 64
2372 #define MAX_SAVED_STATES 16
2373
2374 struct frame_state
2375 {
2376 ULONG_PTR cfa_offset;
2377 unsigned char cfa_reg;
2378 enum reg_rule cfa_rule;
2379 enum reg_rule rules[NB_FRAME_REGS];
2380 ULONG_PTR regs[NB_FRAME_REGS];
2381 };
2382
2383 struct frame_info
2384 {
2385 ULONG_PTR ip;
2386 ULONG_PTR code_align;
2387 LONG_PTR data_align;
2388 unsigned char retaddr_reg;
2389 unsigned char fde_encoding;
2390 unsigned char lsda_encoding;
2391 unsigned char signal_frame;
2392 unsigned char aug_z_format;
2393 unsigned char state_sp;
2394 struct frame_state state;
2395 struct frame_state state_stack[MAX_SAVED_STATES];
2396 };
2397
2398 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2399 {
2400 ULONG_PTR base;
2401
2402 if (encoding == DW_EH_PE_omit) return 0;
2403
2404 switch (encoding & 0xf0)
2405 {
2406 case DW_EH_PE_abs:
2407 base = 0;
2408 break;
2409 case DW_EH_PE_pcrel:
2410 base = (ULONG_PTR)ctx->data;
2411 break;
2412 default:
2413 FIXME("unsupported encoding %02x\n", encoding);
2414 return 0;
2415 }
2416
2417 switch (encoding & 0x0f)
2418 {
2419 case DW_EH_PE_native:
2420 return base + dwarf2_parse_addr(ctx);
2421 case DW_EH_PE_leb128:
2422 return base + dwarf2_leb128_as_unsigned(ctx);
2423 case DW_EH_PE_data2:
2424 return base + dwarf2_parse_u2(ctx);
2425 case DW_EH_PE_data4:
2426 return base + dwarf2_parse_u4(ctx);
2427 case DW_EH_PE_data8:
2428 return base + dwarf2_parse_u8(ctx);
2429 case DW_EH_PE_signed|DW_EH_PE_leb128:
2430 return base + dwarf2_leb128_as_signed(ctx);
2431 case DW_EH_PE_signed|DW_EH_PE_data2:
2432 return base + (signed short)dwarf2_parse_u2(ctx);
2433 case DW_EH_PE_signed|DW_EH_PE_data4:
2434 return base + (signed int)dwarf2_parse_u4(ctx);
2435 case DW_EH_PE_signed|DW_EH_PE_data8:
2436 return base + (LONG64)dwarf2_parse_u8(ctx);
2437 default:
2438 FIXME("unsupported encoding %02x\n", encoding);
2439 return 0;
2440 }
2441 }
2442
2443 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2444 {
2445 unsigned char version;
2446 const char* augmentation;
2447 const unsigned char* end;
2448 ULONG_PTR len;
2449
2450 memset(info, 0, sizeof(*info));
2451 info->lsda_encoding = DW_EH_PE_omit;
2452 info->aug_z_format = 0;
2453
2454 /* parse the CIE first */
2455 version = dwarf2_parse_byte(ctx);
2456 if (version != 1)
2457 {
2458 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2459 return FALSE;
2460 }
2461 augmentation = (const char*)ctx->data;
2462 ctx->data += strlen(augmentation) + 1;
2463
2464 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2465 info->data_align = dwarf2_leb128_as_signed(ctx);
2466 info->retaddr_reg = dwarf2_parse_byte(ctx);
2467 info->state.cfa_rule = RULE_CFA_OFFSET;
2468
2469 end = NULL;
2470 TRACE("\tparsing augmentation %s\n", augmentation);
2471 if (*augmentation) do
2472 {
2473 switch (*augmentation)
2474 {
2475 case 'z':
2476 len = dwarf2_leb128_as_unsigned(ctx);
2477 end = ctx->data + len;
2478 info->aug_z_format = 1;
2479 continue;
2480 case 'L':
2481 info->lsda_encoding = dwarf2_parse_byte(ctx);
2482 continue;
2483 case 'P':
2484 {
2485 unsigned char encoding = dwarf2_parse_byte(ctx);
2486 /* throw away the indirect bit, as we don't care for the result */
2487 encoding &= ~DW_EH_PE_indirect;
2488 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2489 continue;
2490 }
2491 case 'R':
2492 info->fde_encoding = dwarf2_parse_byte(ctx);
2493 continue;
2494 case 'S':
2495 info->signal_frame = 1;
2496 continue;
2497 }
2498 FIXME("unknown augmentation '%c'\n", *augmentation);
2499 if (!end) return FALSE;
2500 break;
2501 } while (*++augmentation);
2502 if (end) ctx->data = end;
2503 return TRUE;
2504 }
2505
2506 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2507 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2508 struct frame_info* info, BOOL in_eh_frame)
2509 {
2510 const unsigned char* ptr_blk;
2511 const unsigned char* cie_ptr;
2512 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2513 unsigned len, id;
2514 unsigned long start, range;
2515 unsigned cie_id;
2516 const BYTE* start_data = fde_ctx->data;
2517
2518 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2519 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2520 {
2521 /* find the FDE for address addr (skip CIE) */
2522 len = dwarf2_parse_u4(fde_ctx);
2523 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2524 ptr_blk = fde_ctx->data + len;
2525 id = dwarf2_parse_u4(fde_ctx);
2526 if (id == cie_id)
2527 {
2528 last_cie_ptr = fde_ctx->data - 8;
2529 /* we need some bits out of the CIE in order to parse all contents */
2530 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2531 cie_ctx->data = fde_ctx->data;
2532 cie_ctx->end_data = ptr_blk;
2533 cie_ctx->word_size = fde_ctx->word_size;
2534 continue;
2535 }
2536 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2537 if (cie_ptr != last_cie_ptr)
2538 {
2539 last_cie_ptr = cie_ptr;
2540 cie_ctx->data = cie_ptr;
2541 cie_ctx->word_size = fde_ctx->word_size;
2542 cie_ctx->end_data = cie_ptr + 4;
2543 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2544 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2545 {
2546 FIXME("wrong CIE pointer\n");
2547 return FALSE;
2548 }
2549 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2550 }
2551 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2552 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2553
2554 if (addr >= start && addr < start + range)
2555 {
2556 /* reset the FDE context */
2557 fde_ctx->end_data = ptr_blk;
2558
2559 info->ip = start;
2560 return TRUE;
2561 }
2562 }
2563 return FALSE;
2564 }
2565
2566 static int valid_reg(ULONG_PTR reg)
2567 {
2568 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2569 return (reg < NB_FRAME_REGS);
2570 }
2571
2572 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2573 ULONG_PTR last_ip, struct frame_info *info)
2574 {
2575 while (ctx->data < ctx->end_data && info->ip < last_ip + info->signal_frame)
2576 {
2577 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2578
2579 if (op & 0xc0)
2580 {
2581 switch (op & 0xc0)
2582 {
2583 case DW_CFA_advance_loc:
2584 {
2585 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2586 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2587 info->ip += offset;
2588 break;
2589 }
2590 case DW_CFA_offset:
2591 {
2592 ULONG_PTR reg = op & 0x3f;
2593 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2594 if (!valid_reg(reg)) break;
2595 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2596 info->ip,
2597 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2598 offset);
2599 info->state.regs[reg] = offset;
2600 info->state.rules[reg] = RULE_CFA_OFFSET;
2601 break;
2602 }
2603 case DW_CFA_restore:
2604 {
2605 ULONG_PTR reg = op & 0x3f;
2606 if (!valid_reg(reg)) break;
2607 TRACE("%lx: DW_CFA_restore %s\n",
2608 info->ip,
2609 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2610 info->state.rules[reg] = RULE_UNSET;
2611 break;
2612 }
2613 }
2614 }
2615 else switch (op)
2616 {
2617 case DW_CFA_nop:
2618 break;
2619 case DW_CFA_set_loc:
2620 {
2621 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2622 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2623 info->ip = loc;
2624 break;
2625 }
2626 case DW_CFA_advance_loc1:
2627 {
2628 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2629 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2630 info->ip += offset;
2631 break;
2632 }
2633 case DW_CFA_advance_loc2:
2634 {
2635 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2636 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2637 info->ip += offset;
2638 break;
2639 }
2640 case DW_CFA_advance_loc4:
2641 {
2642 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2643 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2644 info->ip += offset;
2645 break;
2646 }
2647 case DW_CFA_offset_extended:
2648 case DW_CFA_offset_extended_sf:
2649 {
2650 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2651 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2652 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2653 if (!valid_reg(reg)) break;
2654 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2655 info->ip,
2656 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2657 offset);
2658 info->state.regs[reg] = offset;
2659 info->state.rules[reg] = RULE_CFA_OFFSET;
2660 break;
2661 }
2662 case DW_CFA_restore_extended:
2663 {
2664 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2665 if (!valid_reg(reg)) break;
2666 TRACE("%lx: DW_CFA_restore_extended %s\n",
2667 info->ip,
2668 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2669 info->state.rules[reg] = RULE_UNSET;
2670 break;
2671 }
2672 case DW_CFA_undefined:
2673 {
2674 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2675 if (!valid_reg(reg)) break;
2676 TRACE("%lx: DW_CFA_undefined %s\n",
2677 info->ip,
2678 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2679 info->state.rules[reg] = RULE_UNDEFINED;
2680 break;
2681 }
2682 case DW_CFA_same_value:
2683 {
2684 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2685 if (!valid_reg(reg)) break;
2686 TRACE("%lx: DW_CFA_same_value %s\n",
2687 info->ip,
2688 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2689 info->state.regs[reg] = reg;
2690 info->state.rules[reg] = RULE_SAME;
2691 break;
2692 }
2693 case DW_CFA_register:
2694 {
2695 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2696 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2697 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2698 TRACE("%lx: DW_CFA_register %s == %s\n",
2699 info->ip,
2700 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2701 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2)));
2702 info->state.regs[reg] = reg2;
2703 info->state.rules[reg] = RULE_OTHER_REG;
2704 break;
2705 }
2706 case DW_CFA_remember_state:
2707 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2708 if (info->state_sp >= MAX_SAVED_STATES)
2709 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2710 else
2711 info->state_stack[info->state_sp++] = info->state;
2712 break;
2713 case DW_CFA_restore_state:
2714 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2715 if (!info->state_sp)
2716 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2717 else
2718 info->state = info->state_stack[--info->state_sp];
2719 break;
2720 case DW_CFA_def_cfa:
2721 case DW_CFA_def_cfa_sf:
2722 {
2723 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2724 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2725 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2726 if (!valid_reg(reg)) break;
2727 TRACE("%lx: DW_CFA_def_cfa %s, %lu\n",
2728 info->ip,
2729 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2730 offset);
2731 info->state.cfa_reg = reg;
2732 info->state.cfa_offset = offset;
2733 info->state.cfa_rule = RULE_CFA_OFFSET;
2734 break;
2735 }
2736 case DW_CFA_def_cfa_register:
2737 {
2738 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2739 if (!valid_reg(reg)) break;
2740 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2741 info->ip,
2742 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2743 info->state.cfa_reg = reg;
2744 info->state.cfa_rule = RULE_CFA_OFFSET;
2745 break;
2746 }
2747 case DW_CFA_def_cfa_offset:
2748 case DW_CFA_def_cfa_offset_sf:
2749 {
2750 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2751 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2752 TRACE("%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset);
2753 info->state.cfa_offset = offset;
2754 info->state.cfa_rule = RULE_CFA_OFFSET;
2755 break;
2756 }
2757 case DW_CFA_def_cfa_expression:
2758 {
2759 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2760 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2761 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2762 info->state.cfa_offset = expr;
2763 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2764 ctx->data += len;
2765 break;
2766 }
2767 case DW_CFA_expression:
2768 case DW_CFA_val_expression:
2769 {
2770 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2771 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2772 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2773 if (!valid_reg(reg)) break;
2774 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2775 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2776 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2777 expr, expr + len);
2778 info->state.regs[reg] = expr;
2779 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
2780 ctx->data += len;
2781 break;
2782 }
2783 case DW_CFA_GNU_args_size:
2784 /* FIXME: should check that GCC is the compiler for this CU */
2785 {
2786 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
2787 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
2788 /* ignored */
2789 break;
2790 }
2791 default:
2792 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
2793 break;
2794 }
2795 }
2796 }
2797
2798 /* retrieve a context register from its dwarf number */
2799 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
2800 {
2801 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2802 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2803
2804 if (sz != sizeof(ULONG_PTR))
2805 {
2806 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2807 return 0;
2808 }
2809 return *ptr;
2810 }
2811
2812 /* set a context register from its dwarf number */
2813 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
2814 ULONG_PTR val, BOOL isdebuggee)
2815 {
2816 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2817 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2818
2819 if (isdebuggee)
2820 {
2821 char tmp[16];
2822
2823 if (sz > sizeof(tmp))
2824 {
2825 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
2826 return;
2827 }
2828 if (!sw_read_mem(csw, val, tmp, sz))
2829 {
2830 WARN("Couldn't read memory at %p\n", (void*)val);
2831 return;
2832 }
2833 memcpy(ptr, tmp, sz);
2834 }
2835 else
2836 {
2837 if (sz != sizeof(ULONG_PTR))
2838 {
2839 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2840 return;
2841 }
2842 *ptr = val;
2843 }
2844 }
2845
2846 /* copy a register from one context to another using dwarf number */
2847 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
2848 {
2849 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst), szdst;
2850 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc), szsrc;
2851 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
2852 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
2853
2854 if (szdst != szsrc)
2855 {
2856 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
2857 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
2858 return;
2859 }
2860 memcpy(ptrdst, ptrsrc, szdst);
2861 }
2862
2863 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
2864 const unsigned char* zp, CONTEXT *context)
2865 {
2866 dwarf2_traverse_context_t ctx;
2867 ULONG_PTR reg, sz, tmp, stack[64];
2868 int sp = -1;
2869 ULONG_PTR len;
2870
2871 ctx.data = zp;
2872 ctx.end_data = zp + 4;
2873 len = dwarf2_leb128_as_unsigned(&ctx);
2874 ctx.end_data = ctx.data + len;
2875 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2876
2877 while (ctx.data < ctx.end_data)
2878 {
2879 unsigned char opcode = dwarf2_parse_byte(&ctx);
2880
2881 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
2882 stack[++sp] = opcode - DW_OP_lit0;
2883 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
2884 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
2885 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
2886 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
2887 else switch (opcode)
2888 {
2889 case DW_OP_nop: break;
2890 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
2891 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
2892 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
2893 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
2894 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
2895 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
2896 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
2897 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
2898 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
2899 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
2900 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
2901 case DW_OP_deref:
2902 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
2903 {
2904 ERR("Couldn't read memory at %lx\n", stack[sp]);
2905 tmp = 0;
2906 }
2907 stack[sp] = tmp;
2908 break;
2909 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
2910 case DW_OP_drop: sp--; break;
2911 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
2912 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
2913 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
2914 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
2915 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
2916 case DW_OP_neg: stack[sp] = -stack[sp]; break;
2917 case DW_OP_not: stack[sp] = ~stack[sp]; break;
2918 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
2919 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
2920 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
2921 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
2922 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
2923 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
2924 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
2925 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
2926 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
2927 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
2928 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
2929 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
2930 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
2931 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
2932 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
2933 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
2934 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
2935 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
2936 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
2937 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
2938 case DW_OP_GNU_encoded_addr:
2939 tmp = dwarf2_parse_byte(&ctx);
2940 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
2941 break;
2942 case DW_OP_regx:
2943 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
2944 break;
2945 case DW_OP_bregx:
2946 reg = dwarf2_leb128_as_unsigned(&ctx);
2947 tmp = dwarf2_leb128_as_signed(&ctx);
2948 stack[++sp] = get_context_reg(context, reg) + tmp;
2949 break;
2950 case DW_OP_deref_size:
2951 sz = dwarf2_parse_byte(&ctx);
2952 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
2953 {
2954 ERR("Couldn't read memory at %lx\n", stack[sp]);
2955 tmp = 0;
2956 }
2957 /* do integral promotion */
2958 switch (sz)
2959 {
2960 case 1: stack[sp] = *(unsigned char*)&tmp; break;
2961 case 2: stack[sp] = *(unsigned short*)&tmp; break;
2962 case 4: stack[sp] = *(unsigned int*)&tmp; break;
2963 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
2964 default: FIXME("Unknown size for deref 0x%lx\n", sz);
2965 }
2966 break;
2967 default:
2968 FIXME("unhandled opcode %02x\n", opcode);
2969 }
2970 }
2971 return stack[sp];
2972 }
2973
2974 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
2975 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa)
2976 {
2977 unsigned int i;
2978 ULONG_PTR value;
2979 CONTEXT new_context = *context;
2980
2981 switch (state->cfa_rule)
2982 {
2983 case RULE_EXPRESSION:
2984 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
2985 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa)))
2986 {
2987 WARN("Couldn't read memory at %p\n", (void*)*cfa);
2988 return;
2989 }
2990 break;
2991 case RULE_VAL_EXPRESSION:
2992 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
2993 break;
2994 default:
2995 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset;
2996 break;
2997 }
2998 if (!*cfa) return;
2999
3000 for (i = 0; i < NB_FRAME_REGS; i++)
3001 {
3002 switch (state->rules[i])
3003 {
3004 case RULE_UNSET:
3005 case RULE_UNDEFINED:
3006 case RULE_SAME:
3007 break;
3008 case RULE_CFA_OFFSET:
3009 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE);
3010 break;
3011 case RULE_OTHER_REG:
3012 copy_context_reg(&new_context, i, context, state->regs[i]);
3013 break;
3014 case RULE_EXPRESSION:
3015 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3016 set_context_reg(csw, &new_context, i, value, TRUE);
3017 break;
3018 case RULE_VAL_EXPRESSION:
3019 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3020 set_context_reg(csw, &new_context, i, value, FALSE);
3021 break;
3022 }
3023 }
3024 *context = new_context;
3025 }
3026
3027 /***********************************************************************
3028 * dwarf2_virtual_unwind
3029 *
3030 */
3031 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
3032 {
3033 struct module_pair pair;
3034 struct frame_info info;
3035 dwarf2_traverse_context_t cie_ctx, fde_ctx;
3036 struct module_format* modfmt;
3037 const unsigned char* end;
3038 DWORD_PTR delta;
3039
3040 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
3041 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
3042 !module_get_debug(&pair))
3043 return FALSE;
3044 modfmt = pair.effective->format_info[DFI_DWARF];
3045 if (!modfmt) return FALSE;
3046 memset(&info, 0, sizeof(info));
3047 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
3048 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
3049 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3050 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
3051 * in this process the IMAGE section at a different address as the one expected by
3052 * the image
3053 */
3054 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
3055 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
3056 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
3057 {
3058 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
3059 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
3060 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3061 delta = pair.effective->reloc_delta;
3062 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
3063 {
3064 TRACE("Couldn't find information for %lx\n", ip);
3065 return FALSE;
3066 }
3067 }
3068
3069 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
3070 ip, info.ip, info.code_align, info.data_align,
3071 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg)));
3072
3073 /* if at very beginning of function, return and use default unwinder */
3074 if (ip == info.ip) return FALSE;
3075 execute_cfa_instructions(&cie_ctx, ip, &info);
3076
3077 if (info.aug_z_format) /* get length of augmentation data */
3078 {
3079 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
3080 end = fde_ctx.data + len;
3081 }
3082 else end = NULL;
3083 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
3084 if (end) fde_ctx.data = end;
3085
3086 execute_cfa_instructions(&fde_ctx, ip, &info);
3087 apply_frame_state(pair.effective, csw, context, &info.state, cfa);
3088
3089 return TRUE;
3090 }
3091
3092 static void dwarf2_location_compute(struct process* pcs,
3093 const struct module_format* modfmt,
3094 const struct symt_function* func,
3095 struct location* loc)
3096 {
3097 struct location frame;
3098 DWORD_PTR ip;
3099 int err;
3100 dwarf2_traverse_context_t lctx;
3101
3102 if (!func->container || func->container->tag != SymTagCompiland)
3103 {
3104 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
3105 err = loc_err_internal;
3106 }
3107 else
3108 {
3109 /* instruction pointer relative to compiland's start */
3110 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
3111
3112 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
3113 {
3114 switch (loc->kind)
3115 {
3116 case loc_dwarf2_location_list:
3117 /* Then, if the variable has a location list, find it !! */
3118 if (dwarf2_lookup_loclist(modfmt,
3119 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
3120 ip, &lctx))
3121 goto do_compute;
3122 err = loc_err_out_of_scope;
3123 break;
3124 case loc_dwarf2_block:
3125 /* or if we have a copy of an existing block, get ready for it */
3126 {
3127 unsigned* ptr = (unsigned*)loc->offset;
3128
3129 lctx.data = (const BYTE*)(ptr + 1);
3130 lctx.end_data = lctx.data + *ptr;
3131 lctx.word_size = modfmt->u.dwarf2_info->word_size;
3132 }
3133 do_compute:
3134 /* now get the variable */
3135 err = compute_location(&lctx, loc, pcs->handle, &frame);
3136 break;
3137 case loc_register:
3138 case loc_regrel:
3139 /* nothing to do */
3140 break;
3141 default:
3142 WARN("Unsupported local kind %d\n", loc->kind);
3143 err = loc_err_internal;
3144 }
3145 }
3146 }
3147 if (err < 0)
3148 {
3149 loc->kind = loc_register;
3150 loc->reg = err;
3151 }
3152 }
3153
3154 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3155 {
3156 HeapFree(GetProcessHeap(), 0, modfmt);
3157 }
3158
3159 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
3160 const char* sectname, struct image_section_map* ism)
3161 {
3162 struct image_section_map local_ism;
3163
3164 if (!ism) ism = &local_ism;
3165 if (!image_find_section(fmap, sectname, ism))
3166 {
3167 section->address = NULL;
3168 section->size = 0;
3169 section->rva = 0;
3170 return FALSE;
3171 }
3172
3173 section->address = (const BYTE*)image_map_section(ism);
3174 section->size = image_get_map_size(ism);
3175 section->rva = image_get_map_rva(ism);
3176 return TRUE;
3177 }
3178
3179 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
3180 const struct elf_thunk_area* thunks,
3181 struct image_file_map* fmap)
3182 {
3183 dwarf2_section_t eh_frame, section[section_max];
3184 dwarf2_traverse_context_t mod_ctx;
3185 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3186 debug_line_sect, debug_ranges_sect, eh_frame_sect;
3187 BOOL ret = TRUE;
3188 struct module_format* dwarf2_modfmt;
3189
3190 dwarf2_init_section(&eh_frame, fmap, ".eh_frame", &eh_frame_sect);
3191 dwarf2_init_section(&section[section_debug], fmap, ".debug_info", &debug_sect);
3192 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", &debug_abbrev_sect);
3193 dwarf2_init_section(&section[section_string], fmap, ".debug_str", &debug_str_sect);
3194 dwarf2_init_section(&section[section_line], fmap, ".debug_line", &debug_line_sect);
3195 dwarf2_init_section(&section[section_ranges], fmap, ".debug_ranges", &debug_ranges_sect);
3196
3197 /* to do anything useful we need either .eh_frame or .debug_info */
3198 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) &&
3199 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP))
3200 {
3201 ret = FALSE;
3202 goto leave;
3203 }
3204
3205 if (fmap->modtype == DMT_ELF && debug_sect.fmap)
3206 {
3207 /* debug info might have a different base address than .so file
3208 * when elf file is prelinked after splitting off debug info
3209 * adjust symbol base addresses accordingly
3210 */
3211 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3212 }
3213
3214 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3215
3216 mod_ctx.data = section[section_debug].address;
3217 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3218 mod_ctx.word_size = 0; /* will be correctly set later on */
3219
3220 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3221 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3222 if (!dwarf2_modfmt)
3223 {
3224 ret = FALSE;
3225 goto leave;
3226 }
3227 dwarf2_modfmt->module = module;
3228 dwarf2_modfmt->remove = dwarf2_module_remove;
3229 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3230 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3231 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3232 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3233
3234 /* As we'll need later some sections' content, we won't unmap these
3235 * sections upon existing this function
3236 */
3237 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", NULL);
3238 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", NULL);
3239 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame;
3240
3241 while (mod_ctx.data < mod_ctx.end_data)
3242 {
3243 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3244 }
3245 dwarf2_modfmt->module->module.SymType = SymDia;
3246 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3247 /* FIXME: we could have a finer grain here */
3248 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3249 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3250 dwarf2_modfmt->module->module.SourceIndexed = TRUE;
3251 dwarf2_modfmt->module->module.Publics = TRUE;
3252
3253 leave:
3254 image_unmap_section(&debug_sect);
3255 image_unmap_section(&debug_abbrev_sect);
3256 image_unmap_section(&debug_str_sect);
3257 image_unmap_section(&debug_line_sect);
3258 image_unmap_section(&debug_ranges_sect);
3259 if (!ret) image_unmap_section(&eh_frame_sect);
3260
3261 return ret;
3262 }
Windows API implementation