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dbghelp: Constify some variables.
[wine/multimedia.git] / dlls / dbghelp / dwarf.c
blob913b0c1bd6bce9892cec8a974da9d071d6ef9ef3
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2010, Eric Pouech
6 * Copyright (C) 2010, Alexandre Julliard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #define NONAMELESSUNION
24
25 #include "config.h"
26
27 #include <sys/types.h>
28 #include <fcntl.h>
29 #ifdef HAVE_SYS_STAT_H
30 # include <sys/stat.h>
31 #endif
32 #ifdef HAVE_SYS_MMAN_H
33 #include <sys/mman.h>
34 #endif
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #ifdef HAVE_UNISTD_H
39 # include <unistd.h>
40 #endif
41 #include <stdio.h>
42 #ifndef PATH_MAX
43 #define PATH_MAX MAX_PATH
44 #endif
45 #include <assert.h>
46 #include <stdarg.h>
47
48 #include "windef.h"
49 #include "winbase.h"
50 #include "winuser.h"
51 #include "ole2.h"
52 #include "oleauto.h"
53
54 #include "dbghelp_private.h"
55 #include "image_private.h"
56
57 #include "wine/debug.h"
58
59 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
60
61 /* FIXME:
62 * - Functions:
63 * o unspecified parameters
64 * o inlined functions
65 * o Debug{Start|End}Point
66 * o CFA
67 * - Udt
68 * o proper types loading (nesting)
69 */
70
71 #if 0
72 static void dump(const void* ptr, unsigned len)
73 {
74 int i, j;
75 BYTE msg[128];
76 static const char hexof[] = "0123456789abcdef";
77 const BYTE* x = ptr;
78
79 for (i = 0; i < len; i += 16)
80 {
81 sprintf(msg, "%08x: ", i);
82 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
83 for (j = 0; j < min(16, len - i); j++)
84 {
85 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
86 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
87 msg[10 + 3 * j + 2] = ' ';
88 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
89 x[i + j] : '.';
90 }
91 msg[10 + 3 * 16] = ' ';
92 msg[10 + 3 * 16 + 1 + 16] = '\0';
93 TRACE("%s\n", msg);
94 }
95 }
96 #endif
97
98 /**
99 *
100 * Main Specs:
101 * http://www.eagercon.com/dwarf/dwarf3std.htm
102 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
103 *
104 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
105 *
106 * example of projects who do dwarf2 parsing:
107 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
108 * http://elis.ugent.be/diota/log/ltrace_elf.c
109 */
110 #include "dwarf.h"
111
112 /**
113 * Parsers
114 */
115
116 typedef struct dwarf2_abbrev_entry_attr_s
117 {
118 unsigned long attribute;
119 unsigned long form;
120 struct dwarf2_abbrev_entry_attr_s* next;
121 } dwarf2_abbrev_entry_attr_t;
122
123 typedef struct dwarf2_abbrev_entry_s
124 {
125 unsigned long entry_code;
126 unsigned long tag;
127 unsigned char have_child;
128 unsigned num_attr;
129 dwarf2_abbrev_entry_attr_t* attrs;
130 } dwarf2_abbrev_entry_t;
131
132 struct dwarf2_block
133 {
134 unsigned size;
135 const unsigned char* ptr;
136 };
137
138 struct attribute
139 {
140 unsigned long form;
141 union
142 {
143 unsigned long uvalue;
144 ULONGLONG lluvalue;
145 long svalue;
146 const char* string;
147 struct dwarf2_block block;
148 } u;
149 };
150
151 typedef struct dwarf2_debug_info_s
152 {
153 const dwarf2_abbrev_entry_t*abbrev;
154 struct symt* symt;
155 const unsigned char** data;
156 struct vector children;
157 } dwarf2_debug_info_t;
158
159 typedef struct dwarf2_section_s
160 {
161 const unsigned char* address;
162 unsigned size;
163 DWORD_PTR rva;
164 } dwarf2_section_t;
165
166 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_max};
167
168 typedef struct dwarf2_traverse_context_s
169 {
170 const unsigned char* data;
171 const unsigned char* end_data;
172 unsigned char word_size;
173 } dwarf2_traverse_context_t;
174
175 /* symt_cache indexes */
176 #define sc_void 0
177 #define sc_int1 1
178 #define sc_int2 2
179 #define sc_int4 3
180 #define sc_num 4
181
182 typedef struct dwarf2_parse_context_s
183 {
184 const dwarf2_section_t* sections;
185 unsigned section;
186 struct pool pool;
187 struct module* module;
188 const struct elf_thunk_area*thunks;
189 struct sparse_array abbrev_table;
190 struct sparse_array debug_info_table;
191 unsigned long load_offset;
192 unsigned long ref_offset;
193 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
194 } dwarf2_parse_context_t;
195
196 /* stored in the dbghelp's module internal structure for later reuse */
197 struct dwarf2_module_info_s
198 {
199 dwarf2_section_t debug_loc;
200 dwarf2_section_t debug_frame;
201 dwarf2_section_t eh_frame;
202 unsigned char word_size;
203 };
204
205 #define loc_dwarf2_location_list (loc_user + 0)
206 #define loc_dwarf2_block (loc_user + 1)
207
208 /* forward declarations */
209 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
210
211 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
212 {
213 return *ptr;
214 }
215
216 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
217 {
218 unsigned char uvalue = dwarf2_get_byte(ctx->data);
219 ctx->data += 1;
220 return uvalue;
221 }
222
223 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
224 {
225 return *(const UINT16*)ptr;
226 }
227
228 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
229 {
230 unsigned short uvalue = dwarf2_get_u2(ctx->data);
231 ctx->data += 2;
232 return uvalue;
233 }
234
235 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
236 {
237 return *(const UINT32*)ptr;
238 }
239
240 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
241 {
242 unsigned long uvalue = dwarf2_get_u4(ctx->data);
243 ctx->data += 4;
244 return uvalue;
245 }
246
247 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
248 {
249 return *(const UINT64*)ptr;
250 }
251
252 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
253 {
254 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
255 ctx->data += 8;
256 return uvalue;
257 }
258
259 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
260 {
261 unsigned long ret = 0;
262 unsigned char byte;
263 unsigned shift = 0;
264
265 do
266 {
267 byte = dwarf2_get_byte(ptr++);
268 ret |= (byte & 0x7f) << shift;
269 shift += 7;
270 } while (byte & 0x80);
271
272 if (end) *end = ptr;
273 return ret;
274 }
275
276 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
277 {
278 unsigned long ret;
279
280 assert(ctx);
281
282 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
283
284 return ret;
285 }
286
287 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
288 {
289 long ret = 0;
290 unsigned char byte;
291 unsigned shift = 0;
292 const unsigned size = sizeof(int) * 8;
293
294 do
295 {
296 byte = dwarf2_get_byte(ptr++);
297 ret |= (byte & 0x7f) << shift;
298 shift += 7;
299 } while (byte & 0x80);
300 if (end) *end = ptr;
301
302 /* as spec: sign bit of byte is 2nd high order bit (80x40)
303 * -> 0x80 is used as flag.
304 */
305 if ((shift < size) && (byte & 0x40))
306 {
307 ret |= - (1 << shift);
308 }
309 return ret;
310 }
311
312 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
313 {
314 long ret = 0;
315
316 assert(ctx);
317
318 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
319 return ret;
320 }
321
322 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
323 {
324 unsigned ret;
325 for (ret = 0; ctx->data[ret] & 0x80; ret++);
326 return ret + 1;
327 }
328
329 /******************************************************************
330 * dwarf2_get_addr
331 *
332 * Returns an address.
333 * We assume that in all cases word size from Dwarf matches the size of
334 * addresses in platform where the exec is compiled.
335 */
336 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
337 {
338 unsigned long ret;
339
340 switch (word_size)
341 {
342 case 4:
343 ret = dwarf2_get_u4(ptr);
344 break;
345 case 8:
346 ret = dwarf2_get_u8(ptr);
347 break;
348 default:
349 FIXME("Unsupported Word Size %u\n", word_size);
350 ret = 0;
351 }
352 return ret;
353 }
354
355 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
356 {
357 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
358 ctx->data += ctx->word_size;
359 return ret;
360 }
361
362 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
363 {
364 return wine_dbg_sprintf("ctx(%p)", ctx->data);
365 }
366
367 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
368 {
369 return wine_dbg_sprintf("ctx(%p,%s)",
370 ctx, debugstr_w(ctx->module->module.ModuleName));
371 }
372
373 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
374 {
375 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
376 di->abbrev, di->symt);
377 }
378
379 static dwarf2_abbrev_entry_t*
380 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
381 unsigned long entry_code)
382 {
383 assert( NULL != abbrev_table );
384 return sparse_array_find(abbrev_table, entry_code);
385 }
386
387 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
388 struct sparse_array* abbrev_table,
389 struct pool* pool)
390 {
391 unsigned long entry_code;
392 dwarf2_abbrev_entry_t* abbrev_entry;
393 dwarf2_abbrev_entry_attr_t* new = NULL;
394 dwarf2_abbrev_entry_attr_t* last = NULL;
395 unsigned long attribute;
396 unsigned long form;
397
398 assert( NULL != abbrev_ctx );
399
400 TRACE("%s, end at %p\n",
401 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
402
403 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
404 while (abbrev_ctx->data < abbrev_ctx->end_data)
405 {
406 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
407 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
408 TRACE("found entry_code %lu\n", entry_code);
409 if (!entry_code)
410 {
411 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
412 break;
413 }
414 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
415 assert( NULL != abbrev_entry );
416
417 abbrev_entry->entry_code = entry_code;
418 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
419 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
420 abbrev_entry->attrs = NULL;
421 abbrev_entry->num_attr = 0;
422
423 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
424 abbrev_table, sparse_array_length(abbrev_table),
425 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
426
427 last = NULL;
428 while (1)
429 {
430 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
431 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
432 if (!attribute) break;
433
434 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
435 assert(new);
436
437 new->attribute = attribute;
438 new->form = form;
439 new->next = NULL;
440 if (abbrev_entry->attrs) last->next = new;
441 else abbrev_entry->attrs = new;
442 last = new;
443 abbrev_entry->num_attr++;
444 }
445 }
446 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
447 }
448
449 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
450 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
451 {
452 unsigned step;
453
454 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
455
456 switch (abbrev_attr->form)
457 {
458 case DW_FORM_ref_addr:
459 case DW_FORM_addr: step = ctx->word_size; break;
460 case DW_FORM_flag:
461 case DW_FORM_data1:
462 case DW_FORM_ref1: step = 1; break;
463 case DW_FORM_data2:
464 case DW_FORM_ref2: step = 2; break;
465 case DW_FORM_data4:
466 case DW_FORM_ref4:
467 case DW_FORM_strp: step = 4; break;
468 case DW_FORM_data8:
469 case DW_FORM_ref8: step = 8; break;
470 case DW_FORM_sdata:
471 case DW_FORM_ref_udata:
472 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
473 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
474 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
475 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
476 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
477 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
478 default:
479 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
480 return;
481 }
482 ctx->data += step;
483 }
484
485 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
486 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
487 const unsigned char* data,
488 struct attribute* attr)
489 {
490 attr->form = abbrev_attr->form;
491 switch (attr->form)
492 {
493 case DW_FORM_ref_addr:
494 case DW_FORM_addr:
495 attr->u.uvalue = dwarf2_get_addr(data,
496 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
497 TRACE("addr<0x%lx>\n", attr->u.uvalue);
498 break;
499
500 case DW_FORM_flag:
501 attr->u.uvalue = dwarf2_get_byte(data);
502 TRACE("flag<0x%lx>\n", attr->u.uvalue);
503 break;
504
505 case DW_FORM_data1:
506 attr->u.uvalue = dwarf2_get_byte(data);
507 TRACE("data1<%lu>\n", attr->u.uvalue);
508 break;
509
510 case DW_FORM_data2:
511 attr->u.uvalue = dwarf2_get_u2(data);
512 TRACE("data2<%lu>\n", attr->u.uvalue);
513 break;
514
515 case DW_FORM_data4:
516 attr->u.uvalue = dwarf2_get_u4(data);
517 TRACE("data4<%lu>\n", attr->u.uvalue);
518 break;
519
520 case DW_FORM_data8:
521 attr->u.lluvalue = dwarf2_get_u8(data);
522 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
523 break;
524
525 case DW_FORM_ref1:
526 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
527 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
528 break;
529
530 case DW_FORM_ref2:
531 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
532 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
533 break;
534
535 case DW_FORM_ref4:
536 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
537 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
538 break;
539
540 case DW_FORM_ref8:
541 FIXME("Unhandled 64 bit support\n");
542 break;
543
544 case DW_FORM_sdata:
545 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
546 break;
547
548 case DW_FORM_ref_udata:
549 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
550 break;
551
552 case DW_FORM_udata:
553 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
554 break;
555
556 case DW_FORM_string:
557 attr->u.string = (const char *)data;
558 TRACE("string<%s>\n", attr->u.string);
559 break;
560
561 case DW_FORM_strp:
562 {
563 unsigned long offset = dwarf2_get_u4(data);
564 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
565 }
566 TRACE("strp<%s>\n", attr->u.string);
567 break;
568
569 case DW_FORM_block:
570 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
571 break;
572
573 case DW_FORM_block1:
574 attr->u.block.size = dwarf2_get_byte(data);
575 attr->u.block.ptr = data + 1;
576 break;
577
578 case DW_FORM_block2:
579 attr->u.block.size = dwarf2_get_u2(data);
580 attr->u.block.ptr = data + 2;
581 break;
582
583 case DW_FORM_block4:
584 attr->u.block.size = dwarf2_get_u4(data);
585 attr->u.block.ptr = data + 4;
586 break;
587
588 default:
589 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
590 break;
591 }
592 }
593
594 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
595 const dwarf2_debug_info_t* di,
596 unsigned at, struct attribute* attr)
597 {
598 unsigned i, ai = 0;
599 dwarf2_abbrev_entry_attr_t* abbrev_attr;
600 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
601
602 while (di)
603 {
604 abstract_abbrev_attr = NULL;
605 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
606 {
607 if (abbrev_attr->attribute == at)
608 {
609 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
610 return TRUE;
611 }
612 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
613 at != DW_AT_sibling)
614 {
615 abstract_abbrev_attr = abbrev_attr;
616 ai = i;
617 }
618 }
619 /* do we have an abstract origin debug entry to look into ? */
620 if (!abstract_abbrev_attr) break;
621 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
622 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
623 FIXME("Should have found the debug info entry\n");
624 }
625 return FALSE;
626 }
627
628 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
629 struct symt_compiland*);
630
631 #define Wine_DW_no_register 0x7FFFFFFF
632
633 static unsigned dwarf2_map_register(int regno)
634 {
635 if (regno == Wine_DW_no_register)
636 {
637 FIXME("What the heck map reg 0x%x\n",regno);
638 return 0;
639 }
640 return dbghelp_current_cpu->map_dwarf_register(regno);
641 }
642
643 static enum location_error
644 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
645 HANDLE hproc, const struct location* frame)
646 {
647 DWORD_PTR tmp, stack[64];
648 unsigned stk;
649 unsigned char op;
650 BOOL piece_found = FALSE;
651
652 stack[stk = 0] = 0;
653
654 loc->kind = loc_absolute;
655 loc->reg = Wine_DW_no_register;
656
657 while (ctx->data < ctx->end_data)
658 {
659 op = dwarf2_parse_byte(ctx);
660
661 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
662 stack[++stk] = op - DW_OP_lit0;
663 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
664 {
665 /* dbghelp APIs don't know how to cope with this anyway
666 * (for example 'long long' stored in two registers)
667 * FIXME: We should tell winedbg how to deal with it (sigh)
668 */
669 if (!piece_found)
670 {
671 if (loc->reg != Wine_DW_no_register)
672 FIXME("Only supporting one reg (%d -> %d)\n",
673 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
674 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
675 }
676 loc->kind = loc_register;
677 }
678 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
679 {
680 /* dbghelp APIs don't know how to cope with this anyway
681 * (for example 'long long' stored in two registers)
682 * FIXME: We should tell winedbg how to deal with it (sigh)
683 */
684 if (!piece_found)
685 {
686 if (loc->reg != Wine_DW_no_register)
687 FIXME("Only supporting one breg (%d -> %d)\n",
688 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
689 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
690 }
691 stack[++stk] = dwarf2_leb128_as_signed(ctx);
692 loc->kind = loc_regrel;
693 }
694 else switch (op)
695 {
696 case DW_OP_nop: break;
697 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
698 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
699 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
700 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
701 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
702 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
703 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
704 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
705 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
706 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
707 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
708 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
709 case DW_OP_drop: stk--; break;
710 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
711 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
712 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
713 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
714 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
715 case DW_OP_neg: stack[stk] = -stack[stk]; break;
716 case DW_OP_not: stack[stk] = ~stack[stk]; break;
717 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
718 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
719 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
720 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
721 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
722 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
723 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
724 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
725 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
726 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
727 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
728 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
729 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
730 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
731 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
732 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
733 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
734 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
735 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
736 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
737 case DW_OP_regx:
738 tmp = dwarf2_leb128_as_unsigned(ctx);
739 if (!piece_found)
740 {
741 if (loc->reg != Wine_DW_no_register)
742 FIXME("Only supporting one reg\n");
743 loc->reg = dwarf2_map_register(tmp);
744 }
745 loc->kind = loc_register;
746 break;
747 case DW_OP_bregx:
748 tmp = dwarf2_leb128_as_unsigned(ctx);
749 if (loc->reg != Wine_DW_no_register)
750 FIXME("Only supporting one regx\n");
751 loc->reg = dwarf2_map_register(tmp);
752 stack[++stk] = dwarf2_leb128_as_signed(ctx);
753 loc->kind = loc_regrel;
754 break;
755 case DW_OP_fbreg:
756 if (loc->reg != Wine_DW_no_register)
757 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
758 if (frame && frame->kind == loc_register)
759 {
760 loc->kind = loc_regrel;
761 loc->reg = frame->reg;
762 stack[++stk] = dwarf2_leb128_as_signed(ctx);
763 }
764 else if (frame && frame->kind == loc_regrel)
765 {
766 loc->kind = loc_regrel;
767 loc->reg = frame->reg;
768 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
769 }
770 else
771 {
772 /* FIXME: this could be later optimized by not recomputing
773 * this very location expression
774 */
775 loc->kind = loc_dwarf2_block;
776 stack[++stk] = dwarf2_leb128_as_signed(ctx);
777 }
778 break;
779 case DW_OP_piece:
780 {
781 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
782 WARN("Not handling OP_piece (size=%d)\n", sz);
783 piece_found = TRUE;
784 }
785 break;
786 case DW_OP_deref:
787 if (!stk)
788 {
789 FIXME("Unexpected empty stack\n");
790 return loc_err_internal;
791 }
792 if (loc->reg != Wine_DW_no_register)
793 {
794 WARN("Too complex expression for deref\n");
795 return loc_err_too_complex;
796 }
797 if (hproc)
798 {
799 DWORD_PTR addr = stack[stk--];
800 DWORD_PTR deref;
801
802 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
803 {
804 WARN("Couldn't read memory at %lx\n", addr);
805 return loc_err_cant_read;
806 }
807 stack[++stk] = deref;
808 }
809 else
810 {
811 loc->kind = loc_dwarf2_block;
812 }
813 break;
814 case DW_OP_deref_size:
815 if (!stk)
816 {
817 FIXME("Unexpected empty stack\n");
818 return loc_err_internal;
819 }
820 if (loc->reg != Wine_DW_no_register)
821 {
822 WARN("Too complex expression for deref\n");
823 return loc_err_too_complex;
824 }
825 if (hproc)
826 {
827 DWORD_PTR addr = stack[stk--];
828 BYTE derefsize = dwarf2_parse_byte(ctx);
829 DWORD64 deref;
830
831 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
832 {
833 WARN("Couldn't read memory at %lx\n", addr);
834 return loc_err_cant_read;
835 }
836
837 switch (derefsize)
838 {
839 case 1: stack[++stk] = *(unsigned char*)&deref; break;
840 case 2: stack[++stk] = *(unsigned short*)&deref; break;
841 case 4: stack[++stk] = *(DWORD*)&deref; break;
842 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
843 }
844 }
845 else
846 {
847 loc->kind = loc_dwarf2_block;
848 }
849 break;
850 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_one_debug_info
949 *
950 * Loads into memory one debug info entry, and recursively its children (if any)
951 */
952 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
953 dwarf2_traverse_context_t* traverse,
954 dwarf2_debug_info_t** pdi)
955 {
956 const dwarf2_abbrev_entry_t*abbrev;
957 unsigned long entry_code;
958 unsigned long offset;
959 dwarf2_debug_info_t* di;
960 dwarf2_debug_info_t* child;
961 dwarf2_debug_info_t** where;
962 dwarf2_abbrev_entry_attr_t* attr;
963 unsigned i;
964 struct attribute sibling;
965
966 offset = traverse->data - ctx->sections[ctx->section].address;
967 entry_code = dwarf2_leb128_as_unsigned(traverse);
968 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
969 if (!entry_code)
970 {
971 *pdi = NULL;
972 return TRUE;
973 }
974 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
975 if (!abbrev)
976 {
977 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
978 return FALSE;
979 }
980 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
981 if (!di) return FALSE;
982 di->abbrev = abbrev;
983 di->symt = NULL;
984
985 if (abbrev->num_attr)
986 {
987 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
988 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
989 {
990 di->data[i] = traverse->data;
991 dwarf2_swallow_attribute(traverse, attr);
992 }
993 }
994 else di->data = NULL;
995 if (abbrev->have_child)
996 {
997 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
998 while (traverse->data < traverse->end_data)
999 {
1000 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
1001 if (!child) break;
1002 where = vector_add(&di->children, &ctx->pool);
1003 if (!where) return FALSE;
1004 *where = child;
1005 }
1006 }
1007 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1008 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1009 {
1010 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1011 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1012 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1013 }
1014 *pdi = di;
1015 return TRUE;
1016 }
1017
1018 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1019 dwarf2_debug_info_t* di)
1020 {
1021 struct attribute name;
1022 struct attribute size;
1023 struct attribute encoding;
1024 enum BasicType bt;
1025 int cache_idx = -1;
1026 if (di->symt) return di->symt;
1027
1028 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1029
1030 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1031 name.u.string = NULL;
1032 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1033 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1034
1035 switch (encoding.u.uvalue)
1036 {
1037 case DW_ATE_void: bt = btVoid; break;
1038 case DW_ATE_address: bt = btULong; break;
1039 case DW_ATE_boolean: bt = btBool; break;
1040 case DW_ATE_complex_float: bt = btComplex; break;
1041 case DW_ATE_float: bt = btFloat; break;
1042 case DW_ATE_signed: bt = btInt; break;
1043 case DW_ATE_unsigned: bt = btUInt; break;
1044 case DW_ATE_signed_char: bt = btChar; break;
1045 case DW_ATE_unsigned_char: bt = btChar; break;
1046 default: bt = btNoType; break;
1047 }
1048 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1049 switch (bt)
1050 {
1051 case btVoid:
1052 assert(size.u.uvalue == 0);
1053 cache_idx = sc_void;
1054 break;
1055 case btInt:
1056 switch (size.u.uvalue)
1057 {
1058 case 1: cache_idx = sc_int1; break;
1059 case 2: cache_idx = sc_int2; break;
1060 case 4: cache_idx = sc_int4; break;
1061 }
1062 break;
1063 default: break;
1064 }
1065 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1066 ctx->symt_cache[cache_idx] = di->symt;
1067
1068 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1069 return di->symt;
1070 }
1071
1072 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1073 dwarf2_debug_info_t* di)
1074 {
1075 struct symt* ref_type;
1076 struct attribute name;
1077
1078 if (di->symt) return di->symt;
1079
1080 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1081
1082 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1083 ref_type = dwarf2_lookup_type(ctx, di);
1084
1085 if (name.u.string)
1086 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1087 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1088 return di->symt;
1089 }
1090
1091 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1092 dwarf2_debug_info_t* di)
1093 {
1094 struct symt* ref_type;
1095 struct attribute size;
1096
1097 if (di->symt) return di->symt;
1098
1099 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1100
1101 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1102 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1103 {
1104 ref_type = ctx->symt_cache[sc_void];
1105 assert(ref_type);
1106 }
1107 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1108 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1109 return di->symt;
1110 }
1111
1112 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1113 dwarf2_debug_info_t* di)
1114 {
1115 struct symt* ref_type;
1116 struct symt* idx_type = NULL;
1117 struct attribute min, max, cnt;
1118 dwarf2_debug_info_t* child;
1119 unsigned int i;
1120
1121 if (di->symt) return di->symt;
1122
1123 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1124
1125 ref_type = dwarf2_lookup_type(ctx, di);
1126
1127 if (!di->abbrev->have_child)
1128 {
1129 /* fake an array with unknown size */
1130 /* FIXME: int4 even on 64bit machines??? */
1131 idx_type = ctx->symt_cache[sc_int4];
1132 min.u.uvalue = 0;
1133 max.u.uvalue = -1;
1134 }
1135 else for (i = 0; i < vector_length(&di->children); i++)
1136 {
1137 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1138 switch (child->abbrev->tag)
1139 {
1140 case DW_TAG_subrange_type:
1141 idx_type = dwarf2_lookup_type(ctx, child);
1142 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1143 min.u.uvalue = 0;
1144 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1145 max.u.uvalue = 0;
1146 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1147 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1148 break;
1149 default:
1150 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1151 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1152 break;
1153 }
1154 }
1155 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1156 return di->symt;
1157 }
1158
1159 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1160 dwarf2_debug_info_t* di)
1161 {
1162 struct symt* ref_type;
1163
1164 if (di->symt) return di->symt;
1165
1166 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1167
1168 ref_type = dwarf2_lookup_type(ctx, di);
1169 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1170 di->symt = ref_type;
1171
1172 return ref_type;
1173 }
1174
1175 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1176 dwarf2_debug_info_t* di)
1177 {
1178 struct symt* ref_type;
1179
1180 if (di->symt) return di->symt;
1181
1182 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1183
1184 ref_type = dwarf2_lookup_type(ctx, di);
1185 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1186 di->symt = ref_type;
1187
1188 return ref_type;
1189 }
1190
1191 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1192 dwarf2_debug_info_t* di)
1193 {
1194 struct symt* ref_type = NULL;
1195
1196 if (di->symt) return di->symt;
1197
1198 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1199
1200 ref_type = dwarf2_lookup_type(ctx, di);
1201 /* FIXME: for now, we hard-wire C++ references to pointers */
1202 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1203
1204 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1205
1206 return di->symt;
1207 }
1208
1209 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1210 const dwarf2_debug_info_t* di,
1211 struct symt_udt* parent)
1212 {
1213 struct symt* elt_type;
1214 struct attribute name;
1215 struct attribute bit_size;
1216 struct attribute bit_offset;
1217 struct location loc;
1218
1219 assert(parent);
1220
1221 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1222
1223 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1224 elt_type = dwarf2_lookup_type(ctx, di);
1225 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1226 {
1227 if (loc.kind != loc_absolute)
1228 {
1229 FIXME("Found register, while not expecting it\n");
1230 loc.offset = 0;
1231 }
1232 else
1233 TRACE("found member_location at %s -> %lu\n",
1234 dwarf2_debug_ctx(ctx), loc.offset);
1235 }
1236 else
1237 loc.offset = 0;
1238 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1239 bit_size.u.uvalue = 0;
1240 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1241 {
1242 /* FIXME: we should only do this when implementation is LSB (which is
1243 * the case on i386 processors)
1244 */
1245 struct attribute nbytes;
1246 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1247 {
1248 DWORD64 size;
1249 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1250 (unsigned long)size : 0;
1251 }
1252 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1253 }
1254 else bit_offset.u.uvalue = 0;
1255 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1256 (loc.offset << 3) + bit_offset.u.uvalue,
1257 bit_size.u.uvalue);
1258
1259 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1260 }
1261
1262 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1263 dwarf2_debug_info_t* di,
1264 enum UdtKind udt)
1265 {
1266 struct attribute name;
1267 struct attribute size;
1268
1269 if (di->symt) return di->symt;
1270
1271 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1272
1273 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1274 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1275
1276 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1277
1278 if (di->abbrev->have_child) /** any interest to not have child ? */
1279 {
1280 dwarf2_debug_info_t* child;
1281 unsigned int i;
1282
1283 for (i=0; i<vector_length(&di->children); i++)
1284 {
1285 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1286
1287 switch (child->abbrev->tag)
1288 {
1289 case DW_TAG_member:
1290 /* FIXME: should I follow the sibling stuff ?? */
1291 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1292 break;
1293 case DW_TAG_enumeration_type:
1294 dwarf2_parse_enumeration_type(ctx, child);
1295 break;
1296 case DW_TAG_structure_type:
1297 case DW_TAG_class_type:
1298 case DW_TAG_union_type:
1299 case DW_TAG_typedef:
1300 /* FIXME: we need to handle nested udt definitions */
1301 case DW_TAG_inheritance:
1302 case DW_TAG_subprogram:
1303 case DW_TAG_template_type_param:
1304 case DW_TAG_template_value_param:
1305 case DW_TAG_variable:
1306 /* FIXME: some C++ related stuff */
1307 break;
1308 default:
1309 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1310 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1311 break;
1312 }
1313 }
1314 }
1315
1316 return di->symt;
1317 }
1318
1319 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1320 const dwarf2_debug_info_t* di,
1321 struct symt_enum* parent)
1322 {
1323 struct attribute name;
1324 struct attribute value;
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)) return;
1329 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1330 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1331
1332 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1333 }
1334
1335 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1336 dwarf2_debug_info_t* di)
1337 {
1338 struct attribute name;
1339 struct attribute size;
1340 struct symt_basic* basetype;
1341
1342 if (di->symt) return di->symt;
1343
1344 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1345
1346 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1347 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1348
1349 switch (size.u.uvalue) /* FIXME: that's wrong */
1350 {
1351 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1352 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1353 default:
1354 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1355 }
1356
1357 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1358
1359 if (di->abbrev->have_child) /* any interest to not have child ? */
1360 {
1361 dwarf2_debug_info_t* child;
1362 unsigned int i;
1363
1364 /* FIXME: should we use the sibling stuff ?? */
1365 for (i=0; i<vector_length(&di->children); i++)
1366 {
1367 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1368
1369 switch (child->abbrev->tag)
1370 {
1371 case DW_TAG_enumerator:
1372 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1373 break;
1374 default:
1375 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1376 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1377 }
1378 }
1379 }
1380 return di->symt;
1381 }
1382
1383 /* structure used to pass information around when parsing a subprogram */
1384 typedef struct dwarf2_subprogram_s
1385 {
1386 dwarf2_parse_context_t* ctx;
1387 struct symt_compiland* compiland;
1388 struct symt_function* func;
1389 BOOL non_computed_variable;
1390 struct location frame;
1391 } dwarf2_subprogram_t;
1392
1393 /******************************************************************
1394 * dwarf2_parse_variable
1395 *
1396 * Parses any variable (parameter, local/global variable)
1397 */
1398 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1399 struct symt_block* block,
1400 dwarf2_debug_info_t* di)
1401 {
1402 struct symt* param_type;
1403 struct attribute name, value;
1404 struct location loc;
1405 BOOL is_pmt;
1406
1407 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1408
1409 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1410 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1411
1412 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1413 /* cannot do much without the name, the functions below won't like it. */
1414 return;
1415 }
1416 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1417 &loc, &subpgm->frame))
1418 {
1419 struct attribute ext;
1420
1421 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1422 name.u.string, loc.kind, loc.offset, loc.reg,
1423 dwarf2_debug_ctx(subpgm->ctx));
1424
1425 switch (loc.kind)
1426 {
1427 case loc_error:
1428 break;
1429 case loc_absolute:
1430 /* it's a global variable */
1431 /* FIXME: we don't handle its scope yet */
1432 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1433 ext.u.uvalue = 0;
1434 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1435 name.u.string, !ext.u.uvalue,
1436 subpgm->ctx->load_offset + loc.offset,
1437 0, param_type);
1438 break;
1439 default:
1440 subpgm->non_computed_variable = TRUE;
1441 /* fall through */
1442 case loc_register:
1443 case loc_regrel:
1444 /* either a pmt/variable relative to frame pointer or
1445 * pmt/variable in a register
1446 */
1447 assert(subpgm->func);
1448 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1449 is_pmt ? DataIsParam : DataIsLocal,
1450 &loc, block, param_type, name.u.string);
1451 break;
1452 }
1453 }
1454 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1455 {
1456 VARIANT v;
1457 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1458 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1459 switch (value.form)
1460 {
1461 case DW_FORM_data1:
1462 case DW_FORM_data2:
1463 case DW_FORM_data4:
1464 case DW_FORM_udata:
1465 case DW_FORM_addr:
1466 v.n1.n2.vt = VT_UI4;
1467 v.n1.n2.n3.lVal = value.u.uvalue;
1468 break;
1469
1470 case DW_FORM_data8:
1471 v.n1.n2.vt = VT_UI8;
1472 v.n1.n2.n3.llVal = value.u.lluvalue;
1473 break;
1474
1475 case DW_FORM_sdata:
1476 v.n1.n2.vt = VT_I4;
1477 v.n1.n2.n3.lVal = value.u.svalue;
1478 break;
1479
1480 case DW_FORM_strp:
1481 case DW_FORM_string:
1482 /* FIXME: native doesn't report const strings from here !!
1483 * however, the value of the string is in the code somewhere
1484 */
1485 v.n1.n2.vt = VT_I1 | VT_BYREF;
1486 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1487 break;
1488
1489 case DW_FORM_block:
1490 case DW_FORM_block1:
1491 case DW_FORM_block2:
1492 case DW_FORM_block4:
1493 v.n1.n2.vt = VT_I4;
1494 switch (value.u.block.size)
1495 {
1496 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1497 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1498 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1499 default:
1500 v.n1.n2.vt = VT_I1 | VT_BYREF;
1501 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1502 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1503 }
1504 break;
1505
1506 default:
1507 FIXME("Unsupported form for const value %s (%lx)\n",
1508 name.u.string, value.form);
1509 v.n1.n2.vt = VT_EMPTY;
1510 }
1511 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1512 name.u.string, param_type, &v)->symt;
1513 }
1514 else
1515 {
1516 /* variable has been optimiezd away... report anyway */
1517 loc.kind = loc_error;
1518 loc.reg = loc_err_no_location;
1519 if (subpgm->func)
1520 {
1521 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1522 is_pmt ? DataIsParam : DataIsLocal,
1523 &loc, block, param_type, name.u.string);
1524 }
1525 else
1526 {
1527 WARN("dropping global variable %s which has been optimized away\n", name.u.string);
1528 }
1529 }
1530 if (is_pmt && subpgm->func && subpgm->func->type)
1531 symt_add_function_signature_parameter(subpgm->ctx->module,
1532 (struct symt_function_signature*)subpgm->func->type,
1533 param_type);
1534
1535 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1536 }
1537
1538 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1539 const dwarf2_debug_info_t* di)
1540 {
1541 struct attribute name;
1542 struct attribute low_pc;
1543 struct location loc;
1544
1545 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1546
1547 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1548 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1549 name.u.string = NULL;
1550
1551 loc.kind = loc_absolute;
1552 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1553 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1554 &loc, name.u.string);
1555 }
1556
1557 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1558 struct symt_block* parent_block,
1559 const dwarf2_debug_info_t* di);
1560
1561 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1562 struct symt_block* parent_block,
1563 const dwarf2_debug_info_t* di)
1564 {
1565 struct symt_block* block;
1566 struct attribute low_pc;
1567 struct attribute high_pc;
1568
1569 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1570
1571 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1572 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1573
1574 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1575 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1576 high_pc.u.uvalue - low_pc.u.uvalue);
1577
1578 if (di->abbrev->have_child) /** any interest to not have child ? */
1579 {
1580 dwarf2_debug_info_t* child;
1581 unsigned int i;
1582
1583 for (i=0; i<vector_length(&di->children); i++)
1584 {
1585 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1586
1587 switch (child->abbrev->tag)
1588 {
1589 case DW_TAG_formal_parameter:
1590 case DW_TAG_variable:
1591 dwarf2_parse_variable(subpgm, block, child);
1592 break;
1593 case DW_TAG_lexical_block:
1594 dwarf2_parse_subprogram_block(subpgm, block, child);
1595 break;
1596 case DW_TAG_inlined_subroutine:
1597 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1598 break;
1599 case DW_TAG_label:
1600 dwarf2_parse_subprogram_label(subpgm, child);
1601 break;
1602 default:
1603 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1604 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1605 dwarf2_debug_di(di));
1606 }
1607 }
1608 }
1609 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1610 }
1611
1612 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1613 struct symt_block* parent_block,
1614 const dwarf2_debug_info_t* di)
1615 {
1616 struct symt_block* block;
1617 struct attribute low_pc;
1618 struct attribute high_pc;
1619
1620 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1621
1622 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc))
1623 low_pc.u.uvalue = 0;
1624 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc))
1625 high_pc.u.uvalue = 0;
1626
1627 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1628 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1629 high_pc.u.uvalue - low_pc.u.uvalue);
1630
1631 if (di->abbrev->have_child) /** any interest to not have child ? */
1632 {
1633 dwarf2_debug_info_t* child;
1634 unsigned int i;
1635
1636 for (i=0; i<vector_length(&di->children); i++)
1637 {
1638 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1639
1640 switch (child->abbrev->tag)
1641 {
1642 case DW_TAG_inlined_subroutine:
1643 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1644 break;
1645 case DW_TAG_variable:
1646 dwarf2_parse_variable(subpgm, block, child);
1647 break;
1648 case DW_TAG_lexical_block:
1649 dwarf2_parse_subprogram_block(subpgm, block, child);
1650 break;
1651 case DW_TAG_subprogram:
1652 /* FIXME: likely a declaration (to be checked)
1653 * skip it for now
1654 */
1655 break;
1656 case DW_TAG_formal_parameter:
1657 /* FIXME: likely elements for exception handling (GCC flavor)
1658 * Skip it for now
1659 */
1660 break;
1661 case DW_TAG_label:
1662 dwarf2_parse_subprogram_label(subpgm, child);
1663 break;
1664 case DW_TAG_class_type:
1665 case DW_TAG_structure_type:
1666 case DW_TAG_union_type:
1667 case DW_TAG_enumeration_type:
1668 case DW_TAG_typedef:
1669 /* the type referred to will be loaded when we need it, so skip it */
1670 break;
1671 default:
1672 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1673 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1674 }
1675 }
1676 }
1677
1678 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1679 }
1680
1681 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1682 dwarf2_debug_info_t* di,
1683 struct symt_compiland* compiland)
1684 {
1685 struct attribute name;
1686 struct attribute low_pc;
1687 struct attribute high_pc;
1688 struct attribute is_decl;
1689 struct attribute inline_flags;
1690 struct symt* ret_type;
1691 struct symt_function_signature* sig_type;
1692 dwarf2_subprogram_t subpgm;
1693
1694 if (di->symt) return di->symt;
1695
1696 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1697
1698 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1699 {
1700 WARN("No name for function... dropping function\n");
1701 return NULL;
1702 }
1703 /* if it's an abstract representation of an inline function, there should be
1704 * a concrete object that we'll handle
1705 */
1706 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1707 {
1708 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1709 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1710 return NULL;
1711 }
1712
1713 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1714 if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1715 /* As functions (defined as inline assembly) get debug info with dwarf
1716 * (not the case for stabs), we just drop Wine's thunks here...
1717 * Actual thunks will be created in elf_module from the symbol table
1718 */
1719 if (elf_is_in_thunk_area(ctx->load_offset + low_pc.u.uvalue,
1720 ctx->thunks) >= 0)
1721 return NULL;
1722 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1723 is_decl.u.uvalue = 0;
1724
1725 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1726 {
1727 ret_type = ctx->symt_cache[sc_void];
1728 assert(ret_type);
1729 }
1730
1731 /* FIXME: assuming C source code */
1732 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1733 if (!is_decl.u.uvalue)
1734 {
1735 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1736 ctx->load_offset + low_pc.u.uvalue,
1737 high_pc.u.uvalue - low_pc.u.uvalue,
1738 &sig_type->symt);
1739 di->symt = &subpgm.func->symt;
1740 }
1741 else subpgm.func = NULL;
1742
1743 subpgm.ctx = ctx;
1744 subpgm.compiland = compiland;
1745 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1746 &subpgm.frame, NULL))
1747 {
1748 /* on stack !! */
1749 subpgm.frame.kind = loc_regrel;
1750 subpgm.frame.reg = 0;
1751 subpgm.frame.offset = 0;
1752 }
1753 subpgm.non_computed_variable = FALSE;
1754
1755 if (di->abbrev->have_child) /** any interest to not have child ? */
1756 {
1757 dwarf2_debug_info_t* child;
1758 unsigned int i;
1759
1760 for (i=0; i<vector_length(&di->children); i++)
1761 {
1762 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1763
1764 switch (child->abbrev->tag)
1765 {
1766 case DW_TAG_variable:
1767 case DW_TAG_formal_parameter:
1768 dwarf2_parse_variable(&subpgm, NULL, child);
1769 break;
1770 case DW_TAG_lexical_block:
1771 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1772 break;
1773 case DW_TAG_inlined_subroutine:
1774 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1775 break;
1776 case DW_TAG_subprogram:
1777 /* FIXME: likely a declaration (to be checked)
1778 * skip it for now
1779 */
1780 break;
1781 case DW_TAG_label:
1782 dwarf2_parse_subprogram_label(&subpgm, child);
1783 break;
1784 case DW_TAG_class_type:
1785 case DW_TAG_structure_type:
1786 case DW_TAG_union_type:
1787 case DW_TAG_enumeration_type:
1788 case DW_TAG_typedef:
1789 /* the type referred to will be loaded when we need it, so skip it */
1790 break;
1791 case DW_TAG_unspecified_parameters:
1792 case DW_TAG_template_type_param:
1793 case DW_TAG_template_value_param:
1794 /* FIXME: no support in dbghelp's internals so far */
1795 break;
1796 default:
1797 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1798 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1799 }
1800 }
1801 }
1802
1803 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1804 {
1805 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1806 &subpgm.frame, NULL);
1807 }
1808 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1809
1810 return di->symt;
1811 }
1812
1813 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1814 dwarf2_debug_info_t* di)
1815 {
1816 struct symt* ret_type;
1817 struct symt_function_signature* sig_type;
1818
1819 if (di->symt) return di->symt;
1820
1821 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1822
1823 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1824 {
1825 ret_type = ctx->symt_cache[sc_void];
1826 assert(ret_type);
1827 }
1828
1829 /* FIXME: assuming C source code */
1830 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1831
1832 if (di->abbrev->have_child) /** any interest to not have child ? */
1833 {
1834 dwarf2_debug_info_t* child;
1835 unsigned int i;
1836
1837 for (i=0; i<vector_length(&di->children); i++)
1838 {
1839 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1840
1841 switch (child->abbrev->tag)
1842 {
1843 case DW_TAG_formal_parameter:
1844 symt_add_function_signature_parameter(ctx->module, sig_type,
1845 dwarf2_lookup_type(ctx, child));
1846 break;
1847 case DW_TAG_unspecified_parameters:
1848 WARN("Unsupported unspecified parameters\n");
1849 break;
1850 }
1851 }
1852 }
1853
1854 return di->symt = &sig_type->symt;
1855 }
1856
1857 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1858 dwarf2_debug_info_t* di,
1859 struct symt_compiland* compiland)
1860 {
1861 switch (di->abbrev->tag)
1862 {
1863 case DW_TAG_typedef:
1864 dwarf2_parse_typedef(ctx, di);
1865 break;
1866 case DW_TAG_base_type:
1867 dwarf2_parse_base_type(ctx, di);
1868 break;
1869 case DW_TAG_pointer_type:
1870 dwarf2_parse_pointer_type(ctx, di);
1871 break;
1872 case DW_TAG_class_type:
1873 dwarf2_parse_udt_type(ctx, di, UdtClass);
1874 break;
1875 case DW_TAG_structure_type:
1876 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1877 break;
1878 case DW_TAG_union_type:
1879 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1880 break;
1881 case DW_TAG_array_type:
1882 dwarf2_parse_array_type(ctx, di);
1883 break;
1884 case DW_TAG_const_type:
1885 dwarf2_parse_const_type(ctx, di);
1886 break;
1887 case DW_TAG_volatile_type:
1888 dwarf2_parse_volatile_type(ctx, di);
1889 break;
1890 case DW_TAG_reference_type:
1891 dwarf2_parse_reference_type(ctx, di);
1892 break;
1893 case DW_TAG_enumeration_type:
1894 dwarf2_parse_enumeration_type(ctx, di);
1895 break;
1896 case DW_TAG_subprogram:
1897 dwarf2_parse_subprogram(ctx, di, compiland);
1898 break;
1899 case DW_TAG_subroutine_type:
1900 dwarf2_parse_subroutine_type(ctx, di);
1901 break;
1902 case DW_TAG_variable:
1903 {
1904 dwarf2_subprogram_t subpgm;
1905
1906 subpgm.ctx = ctx;
1907 subpgm.compiland = compiland;
1908 subpgm.func = NULL;
1909 subpgm.frame.kind = loc_absolute;
1910 subpgm.frame.offset = 0;
1911 subpgm.frame.reg = Wine_DW_no_register;
1912 dwarf2_parse_variable(&subpgm, NULL, di);
1913 }
1914 break;
1915 /* silence a couple of C++ defines */
1916 case DW_TAG_namespace:
1917 case DW_TAG_imported_module:
1918 case DW_TAG_imported_declaration:
1919 break;
1920 default:
1921 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1922 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1923 }
1924 }
1925
1926 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1927 const struct vector* v, unsigned file, unsigned line)
1928 {
1929 struct symt_function* func;
1930 struct symt_ht* symt;
1931 unsigned* psrc;
1932
1933 if (!file || !(psrc = vector_at(v, file - 1))) return;
1934
1935 TRACE("%s %lx %s %u\n",
1936 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
1937 if (!(symt = symt_find_nearest(module, address)) ||
1938 symt->symt.tag != SymTagFunction) return;
1939 func = (struct symt_function*)symt;
1940 symt_add_func_line(module, func, *psrc, line, address - func->address);
1941 }
1942
1943 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
1944 dwarf2_parse_context_t* ctx,
1945 const char* compile_dir,
1946 unsigned long offset)
1947 {
1948 dwarf2_traverse_context_t traverse;
1949 unsigned long length;
1950 unsigned version, header_len, insn_size, default_stmt;
1951 unsigned line_range, opcode_base;
1952 int line_base;
1953 const unsigned char* opcode_len;
1954 struct vector dirs;
1955 struct vector files;
1956 const char** p;
1957
1958 /* section with line numbers stripped */
1959 if (sections[section_line].address == IMAGE_NO_MAP)
1960 return FALSE;
1961
1962 traverse.data = sections[section_line].address + offset;
1963 traverse.end_data = traverse.data + 4;
1964 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1965
1966 length = dwarf2_parse_u4(&traverse);
1967 traverse.end_data = sections[section_line].address + offset + length;
1968
1969 version = dwarf2_parse_u2(&traverse);
1970 header_len = dwarf2_parse_u4(&traverse);
1971 insn_size = dwarf2_parse_byte(&traverse);
1972 default_stmt = dwarf2_parse_byte(&traverse);
1973 line_base = (signed char)dwarf2_parse_byte(&traverse);
1974 line_range = dwarf2_parse_byte(&traverse);
1975 opcode_base = dwarf2_parse_byte(&traverse);
1976
1977 opcode_len = traverse.data;
1978 traverse.data += opcode_base - 1;
1979
1980 vector_init(&dirs, sizeof(const char*), 4);
1981 p = vector_add(&dirs, &ctx->pool);
1982 *p = compile_dir ? compile_dir : ".";
1983 while (*traverse.data)
1984 {
1985 const char* rel = (const char*)traverse.data;
1986 unsigned rellen = strlen(rel);
1987 TRACE("Got include %s\n", rel);
1988 traverse.data += rellen + 1;
1989 p = vector_add(&dirs, &ctx->pool);
1990
1991 if (*rel == '/' || !compile_dir)
1992 *p = rel;
1993 else
1994 {
1995 /* include directory relative to compile directory */
1996 unsigned baselen = strlen(compile_dir);
1997 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
1998 strcpy(tmp, compile_dir);
1999 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2000 strcpy(&tmp[baselen], rel);
2001 *p = tmp;
2002 }
2003
2004 }
2005 traverse.data++;
2006
2007 vector_init(&files, sizeof(unsigned), 16);
2008 while (*traverse.data)
2009 {
2010 unsigned int dir_index, mod_time, length;
2011 const char* name;
2012 const char* dir;
2013 unsigned* psrc;
2014
2015 name = (const char*)traverse.data;
2016 traverse.data += strlen(name) + 1;
2017 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2018 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2019 length = dwarf2_leb128_as_unsigned(&traverse);
2020 dir = *(const char**)vector_at(&dirs, dir_index);
2021 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
2022 psrc = vector_add(&files, &ctx->pool);
2023 *psrc = source_new(ctx->module, dir, name);
2024 }
2025 traverse.data++;
2026
2027 while (traverse.data < traverse.end_data)
2028 {
2029 unsigned long address = 0;
2030 unsigned file = 1;
2031 unsigned line = 1;
2032 unsigned is_stmt = default_stmt;
2033 BOOL end_sequence = FALSE;
2034 unsigned opcode, extopcode, i;
2035
2036 while (!end_sequence)
2037 {
2038 opcode = dwarf2_parse_byte(&traverse);
2039 TRACE("Got opcode %x\n", opcode);
2040
2041 if (opcode >= opcode_base)
2042 {
2043 unsigned delta = opcode - opcode_base;
2044
2045 address += (delta / line_range) * insn_size;
2046 line += line_base + (delta % line_range);
2047 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2048 }
2049 else
2050 {
2051 switch (opcode)
2052 {
2053 case DW_LNS_copy:
2054 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2055 break;
2056 case DW_LNS_advance_pc:
2057 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2058 break;
2059 case DW_LNS_advance_line:
2060 line += dwarf2_leb128_as_signed(&traverse);
2061 break;
2062 case DW_LNS_set_file:
2063 file = dwarf2_leb128_as_unsigned(&traverse);
2064 break;
2065 case DW_LNS_set_column:
2066 dwarf2_leb128_as_unsigned(&traverse);
2067 break;
2068 case DW_LNS_negate_stmt:
2069 is_stmt = !is_stmt;
2070 break;
2071 case DW_LNS_set_basic_block:
2072 break;
2073 case DW_LNS_const_add_pc:
2074 address += ((255 - opcode_base) / line_range) * insn_size;
2075 break;
2076 case DW_LNS_fixed_advance_pc:
2077 address += dwarf2_parse_u2(&traverse);
2078 break;
2079 case DW_LNS_extended_op:
2080 dwarf2_leb128_as_unsigned(&traverse);
2081 extopcode = dwarf2_parse_byte(&traverse);
2082 switch (extopcode)
2083 {
2084 case DW_LNE_end_sequence:
2085 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2086 end_sequence = TRUE;
2087 break;
2088 case DW_LNE_set_address:
2089 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2090 break;
2091 case DW_LNE_define_file:
2092 FIXME("not handled %s\n", traverse.data);
2093 traverse.data += strlen((const char *)traverse.data) + 1;
2094 dwarf2_leb128_as_unsigned(&traverse);
2095 dwarf2_leb128_as_unsigned(&traverse);
2096 dwarf2_leb128_as_unsigned(&traverse);
2097 break;
2098 case DW_LNE_set_discriminator:
2099 WARN("not handled %s\n", traverse.data);
2100 dwarf2_leb128_as_unsigned(&traverse);
2101 break;
2102 default:
2103 FIXME("Unsupported extended opcode %x\n", extopcode);
2104 break;
2105 }
2106 break;
2107 default:
2108 WARN("Unsupported opcode %x\n", opcode);
2109 for (i = 0; i < opcode_len[opcode]; i++)
2110 dwarf2_leb128_as_unsigned(&traverse);
2111 break;
2112 }
2113 }
2114 }
2115 }
2116 return TRUE;
2117 }
2118
2119 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2120 struct module* module,
2121 const struct elf_thunk_area* thunks,
2122 dwarf2_traverse_context_t* mod_ctx,
2123 unsigned long load_offset)
2124 {
2125 dwarf2_parse_context_t ctx;
2126 dwarf2_traverse_context_t abbrev_ctx;
2127 dwarf2_debug_info_t* di;
2128 dwarf2_traverse_context_t cu_ctx;
2129 const unsigned char* comp_unit_start = mod_ctx->data;
2130 unsigned long cu_length;
2131 unsigned short cu_version;
2132 unsigned long cu_abbrev_offset;
2133 BOOL ret = FALSE;
2134
2135 cu_length = dwarf2_parse_u4(mod_ctx);
2136 cu_ctx.data = mod_ctx->data;
2137 cu_ctx.end_data = mod_ctx->data + cu_length;
2138 mod_ctx->data += cu_length;
2139 cu_version = dwarf2_parse_u2(&cu_ctx);
2140 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2141 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2142
2143 TRACE("Compilation Unit Header found at 0x%x:\n",
2144 (int)(comp_unit_start - sections[section_debug].address));
2145 TRACE("- length: %lu\n", cu_length);
2146 TRACE("- version: %u\n", cu_version);
2147 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2148 TRACE("- word_size: %u\n", cu_ctx.word_size);
2149
2150 if (cu_version != 2)
2151 {
2152 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2153 cu_version);
2154 return FALSE;
2155 }
2156
2157 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2158 mod_ctx->word_size = cu_ctx.word_size;
2159
2160 pool_init(&ctx.pool, 65536);
2161 ctx.sections = sections;
2162 ctx.section = section_debug;
2163 ctx.module = module;
2164 ctx.thunks = thunks;
2165 ctx.load_offset = load_offset;
2166 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2167 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2168 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2169
2170 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2171 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2172 abbrev_ctx.word_size = cu_ctx.word_size;
2173 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2174
2175 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2176 dwarf2_read_one_debug_info(&ctx, &cu_ctx, &di);
2177
2178 if (di->abbrev->tag == DW_TAG_compile_unit)
2179 {
2180 struct attribute name;
2181 dwarf2_debug_info_t** pdi = NULL;
2182 struct attribute stmt_list, low_pc;
2183 struct attribute comp_dir;
2184
2185 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2186 name.u.string = NULL;
2187
2188 /* get working directory of current compilation unit */
2189 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2190 comp_dir.u.string = NULL;
2191
2192 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2193 low_pc.u.uvalue = 0;
2194 di->symt = &symt_new_compiland(module,
2195 ctx.load_offset + low_pc.u.uvalue,
2196 source_new(module, comp_dir.u.string, name.u.string))->symt;
2197
2198 if (di->abbrev->have_child)
2199 {
2200 unsigned int i;
2201 for (i=0; i<vector_length(&di->children); i++)
2202 {
2203 pdi = vector_at(&di->children, i);
2204 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2205 }
2206 }
2207 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2208 {
2209 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2210 module->module.LineNumbers = TRUE;
2211 }
2212 ret = TRUE;
2213 }
2214 else FIXME("Should have a compilation unit here\n");
2215 pool_destroy(&ctx.pool);
2216 return ret;
2217 }
2218
2219 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2220 unsigned long ip, dwarf2_traverse_context_t* lctx)
2221 {
2222 DWORD_PTR beg, end;
2223 const BYTE* ptr = start;
2224 DWORD len;
2225
2226 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2227 {
2228 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2229 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2230 if (!beg && !end) break;
2231 len = dwarf2_get_u2(ptr); ptr += 2;
2232
2233 if (beg <= ip && ip < end)
2234 {
2235 lctx->data = ptr;
2236 lctx->end_data = ptr + len;
2237 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2238 return TRUE;
2239 }
2240 ptr += len;
2241 }
2242 WARN("Couldn't find ip in location list\n");
2243 return FALSE;
2244 }
2245
2246 static enum location_error loc_compute_frame(struct process* pcs,
2247 const struct module_format* modfmt,
2248 const struct symt_function* func,
2249 DWORD_PTR ip, struct location* frame)
2250 {
2251 struct symt** psym = NULL;
2252 struct location* pframe;
2253 dwarf2_traverse_context_t lctx;
2254 enum location_error err;
2255 unsigned int i;
2256
2257 for (i=0; i<vector_length(&func->vchildren); i++)
2258 {
2259 psym = vector_at(&func->vchildren, i);
2260 if ((*psym)->tag == SymTagCustom)
2261 {
2262 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2263
2264 /* First, recompute the frame information, if needed */
2265 switch (pframe->kind)
2266 {
2267 case loc_regrel:
2268 case loc_register:
2269 *frame = *pframe;
2270 break;
2271 case loc_dwarf2_location_list:
2272 WARN("Searching loclist for %s\n", func->hash_elt.name);
2273 if (!dwarf2_lookup_loclist(modfmt,
2274 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2275 ip, &lctx))
2276 return loc_err_out_of_scope;
2277 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2278 if (frame->kind >= loc_user)
2279 {
2280 WARN("Couldn't compute runtime frame location\n");
2281 return loc_err_too_complex;
2282 }
2283 break;
2284 default:
2285 WARN("Unsupported frame kind %d\n", pframe->kind);
2286 return loc_err_internal;
2287 }
2288 return 0;
2289 }
2290 }
2291 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2292 return loc_err_internal;
2293 }
2294
2295 enum reg_rule
2296 {
2297 RULE_UNSET, /* not set at all */
2298 RULE_UNDEFINED, /* undefined value */
2299 RULE_SAME, /* same value as previous frame */
2300 RULE_CFA_OFFSET, /* stored at cfa offset */
2301 RULE_OTHER_REG, /* stored in other register */
2302 RULE_EXPRESSION, /* address specified by expression */
2303 RULE_VAL_EXPRESSION /* value specified by expression */
2304 };
2305
2306 /* make it large enough for all CPUs */
2307 #define NB_FRAME_REGS 64
2308 #define MAX_SAVED_STATES 16
2309
2310 struct frame_state
2311 {
2312 ULONG_PTR cfa_offset;
2313 unsigned char cfa_reg;
2314 enum reg_rule cfa_rule;
2315 enum reg_rule rules[NB_FRAME_REGS];
2316 ULONG_PTR regs[NB_FRAME_REGS];
2317 };
2318
2319 struct frame_info
2320 {
2321 ULONG_PTR ip;
2322 ULONG_PTR code_align;
2323 LONG_PTR data_align;
2324 unsigned char retaddr_reg;
2325 unsigned char fde_encoding;
2326 unsigned char lsda_encoding;
2327 unsigned char signal_frame;
2328 unsigned char aug_z_format;
2329 unsigned char state_sp;
2330 struct frame_state state;
2331 struct frame_state state_stack[MAX_SAVED_STATES];
2332 };
2333
2334 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2335 {
2336 ULONG_PTR base;
2337
2338 if (encoding == DW_EH_PE_omit) return 0;
2339
2340 switch (encoding & 0xf0)
2341 {
2342 case DW_EH_PE_abs:
2343 base = 0;
2344 break;
2345 case DW_EH_PE_pcrel:
2346 base = (ULONG_PTR)ctx->data;
2347 break;
2348 default:
2349 FIXME("unsupported encoding %02x\n", encoding);
2350 return 0;
2351 }
2352
2353 switch (encoding & 0x0f)
2354 {
2355 case DW_EH_PE_native:
2356 return base + dwarf2_parse_addr(ctx);
2357 case DW_EH_PE_leb128:
2358 return base + dwarf2_leb128_as_unsigned(ctx);
2359 case DW_EH_PE_data2:
2360 return base + dwarf2_parse_u2(ctx);
2361 case DW_EH_PE_data4:
2362 return base + dwarf2_parse_u4(ctx);
2363 case DW_EH_PE_data8:
2364 return base + dwarf2_parse_u8(ctx);
2365 case DW_EH_PE_signed|DW_EH_PE_leb128:
2366 return base + dwarf2_leb128_as_signed(ctx);
2367 case DW_EH_PE_signed|DW_EH_PE_data2:
2368 return base + (signed short)dwarf2_parse_u2(ctx);
2369 case DW_EH_PE_signed|DW_EH_PE_data4:
2370 return base + (signed int)dwarf2_parse_u4(ctx);
2371 case DW_EH_PE_signed|DW_EH_PE_data8:
2372 return base + (LONG64)dwarf2_parse_u8(ctx);
2373 default:
2374 FIXME("unsupported encoding %02x\n", encoding);
2375 return 0;
2376 }
2377 }
2378
2379 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2380 {
2381 unsigned char version;
2382 const char* augmentation;
2383 const unsigned char* end;
2384 ULONG_PTR len;
2385
2386 memset(info, 0, sizeof(*info));
2387 info->lsda_encoding = DW_EH_PE_omit;
2388 info->aug_z_format = 0;
2389
2390 /* parse the CIE first */
2391 version = dwarf2_parse_byte(ctx);
2392 if (version != 1)
2393 {
2394 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2395 return FALSE;
2396 }
2397 augmentation = (const char*)ctx->data;
2398 ctx->data += strlen(augmentation) + 1;
2399
2400 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2401 info->data_align = dwarf2_leb128_as_signed(ctx);
2402 info->retaddr_reg = dwarf2_parse_byte(ctx);
2403 info->state.cfa_rule = RULE_CFA_OFFSET;
2404
2405 end = NULL;
2406 TRACE("\tparsing augmentation %s\n", augmentation);
2407 if (*augmentation) do
2408 {
2409 switch (*augmentation)
2410 {
2411 case 'z':
2412 len = dwarf2_leb128_as_unsigned(ctx);
2413 end = ctx->data + len;
2414 info->aug_z_format = 1;
2415 continue;
2416 case 'L':
2417 info->lsda_encoding = dwarf2_parse_byte(ctx);
2418 continue;
2419 case 'P':
2420 {
2421 unsigned char encoding = dwarf2_parse_byte(ctx);
2422 /* throw away the indirect bit, as we don't care for the result */
2423 encoding &= ~DW_EH_PE_indirect;
2424 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2425 continue;
2426 }
2427 case 'R':
2428 info->fde_encoding = dwarf2_parse_byte(ctx);
2429 continue;
2430 case 'S':
2431 info->signal_frame = 1;
2432 continue;
2433 }
2434 FIXME("unknown augmentation '%c'\n", *augmentation);
2435 if (!end) return FALSE;
2436 break;
2437 } while (*++augmentation);
2438 if (end) ctx->data = end;
2439 return TRUE;
2440 }
2441
2442 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2443 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2444 struct frame_info* info, BOOL in_eh_frame)
2445 {
2446 const unsigned char* ptr_blk;
2447 const unsigned char* cie_ptr;
2448 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2449 unsigned len, id;
2450 unsigned long start, range;
2451 unsigned cie_id;
2452 const BYTE* start_data = fde_ctx->data;
2453
2454 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2455 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2456 {
2457 /* find the FDE for address addr (skip CIE) */
2458 len = dwarf2_parse_u4(fde_ctx);
2459 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2460 ptr_blk = fde_ctx->data + len;
2461 id = dwarf2_parse_u4(fde_ctx);
2462 if (id == cie_id)
2463 {
2464 last_cie_ptr = fde_ctx->data - 8;
2465 /* we need some bits out of the CIE in order to parse all contents */
2466 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2467 cie_ctx->data = fde_ctx->data;
2468 cie_ctx->end_data = ptr_blk;
2469 cie_ctx->word_size = fde_ctx->word_size;
2470 continue;
2471 }
2472 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2473 if (cie_ptr != last_cie_ptr)
2474 {
2475 last_cie_ptr = cie_ptr;
2476 cie_ctx->data = cie_ptr;
2477 cie_ctx->word_size = fde_ctx->word_size;
2478 cie_ctx->end_data = cie_ptr + 4;
2479 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2480 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2481 {
2482 FIXME("wrong CIE pointer\n");
2483 return FALSE;
2484 }
2485 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2486 }
2487 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2488 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2489
2490 if (addr >= start && addr < start + range)
2491 {
2492 /* reset the FDE context */
2493 fde_ctx->end_data = ptr_blk;
2494
2495 info->ip = start;
2496 return TRUE;
2497 }
2498 }
2499 return FALSE;
2500 }
2501
2502 static int valid_reg(ULONG_PTR reg)
2503 {
2504 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2505 return (reg < NB_FRAME_REGS);
2506 }
2507
2508 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2509 ULONG_PTR last_ip, struct frame_info *info)
2510 {
2511 while (ctx->data < ctx->end_data && info->ip < last_ip + info->signal_frame)
2512 {
2513 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2514
2515 if (op & 0xc0)
2516 {
2517 switch (op & 0xc0)
2518 {
2519 case DW_CFA_advance_loc:
2520 {
2521 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2522 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2523 info->ip += offset;
2524 break;
2525 }
2526 case DW_CFA_offset:
2527 {
2528 ULONG_PTR reg = op & 0x3f;
2529 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2530 if (!valid_reg(reg)) break;
2531 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2532 info->ip,
2533 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2534 offset);
2535 info->state.regs[reg] = offset;
2536 info->state.rules[reg] = RULE_CFA_OFFSET;
2537 break;
2538 }
2539 case DW_CFA_restore:
2540 {
2541 ULONG_PTR reg = op & 0x3f;
2542 if (!valid_reg(reg)) break;
2543 TRACE("%lx: DW_CFA_restore %s\n",
2544 info->ip,
2545 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2546 info->state.rules[reg] = RULE_UNSET;
2547 break;
2548 }
2549 }
2550 }
2551 else switch (op)
2552 {
2553 case DW_CFA_nop:
2554 break;
2555 case DW_CFA_set_loc:
2556 {
2557 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2558 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2559 info->ip = loc;
2560 break;
2561 }
2562 case DW_CFA_advance_loc1:
2563 {
2564 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2565 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2566 info->ip += offset;
2567 break;
2568 }
2569 case DW_CFA_advance_loc2:
2570 {
2571 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2572 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2573 info->ip += offset;
2574 break;
2575 }
2576 case DW_CFA_advance_loc4:
2577 {
2578 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2579 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2580 info->ip += offset;
2581 break;
2582 }
2583 case DW_CFA_offset_extended:
2584 case DW_CFA_offset_extended_sf:
2585 {
2586 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2587 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2588 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2589 if (!valid_reg(reg)) break;
2590 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2591 info->ip,
2592 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2593 offset);
2594 info->state.regs[reg] = offset;
2595 info->state.rules[reg] = RULE_CFA_OFFSET;
2596 break;
2597 }
2598 case DW_CFA_restore_extended:
2599 {
2600 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2601 if (!valid_reg(reg)) break;
2602 TRACE("%lx: DW_CFA_restore_extended %s\n",
2603 info->ip,
2604 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2605 info->state.rules[reg] = RULE_UNSET;
2606 break;
2607 }
2608 case DW_CFA_undefined:
2609 {
2610 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2611 if (!valid_reg(reg)) break;
2612 TRACE("%lx: DW_CFA_undefined %s\n",
2613 info->ip,
2614 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2615 info->state.rules[reg] = RULE_UNDEFINED;
2616 break;
2617 }
2618 case DW_CFA_same_value:
2619 {
2620 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2621 if (!valid_reg(reg)) break;
2622 TRACE("%lx: DW_CFA_same_value %s\n",
2623 info->ip,
2624 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2625 info->state.regs[reg] = reg;
2626 info->state.rules[reg] = RULE_SAME;
2627 break;
2628 }
2629 case DW_CFA_register:
2630 {
2631 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2632 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2633 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2634 TRACE("%lx: DW_CFA_register %s == %s\n",
2635 info->ip,
2636 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2637 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2)));
2638 info->state.regs[reg] = reg2;
2639 info->state.rules[reg] = RULE_OTHER_REG;
2640 break;
2641 }
2642 case DW_CFA_remember_state:
2643 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2644 if (info->state_sp >= MAX_SAVED_STATES)
2645 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2646 else
2647 info->state_stack[info->state_sp++] = info->state;
2648 break;
2649 case DW_CFA_restore_state:
2650 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2651 if (!info->state_sp)
2652 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2653 else
2654 info->state = info->state_stack[--info->state_sp];
2655 break;
2656 case DW_CFA_def_cfa:
2657 case DW_CFA_def_cfa_sf:
2658 {
2659 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2660 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2661 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2662 if (!valid_reg(reg)) break;
2663 TRACE("%lx: DW_CFA_def_cfa %s, %lu\n",
2664 info->ip,
2665 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2666 offset);
2667 info->state.cfa_reg = reg;
2668 info->state.cfa_offset = offset;
2669 info->state.cfa_rule = RULE_CFA_OFFSET;
2670 break;
2671 }
2672 case DW_CFA_def_cfa_register:
2673 {
2674 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2675 if (!valid_reg(reg)) break;
2676 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2677 info->ip,
2678 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2679 info->state.cfa_reg = reg;
2680 info->state.cfa_rule = RULE_CFA_OFFSET;
2681 break;
2682 }
2683 case DW_CFA_def_cfa_offset:
2684 case DW_CFA_def_cfa_offset_sf:
2685 {
2686 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2687 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2688 TRACE("%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset);
2689 info->state.cfa_offset = offset;
2690 info->state.cfa_rule = RULE_CFA_OFFSET;
2691 break;
2692 }
2693 case DW_CFA_def_cfa_expression:
2694 {
2695 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2696 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2697 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2698 info->state.cfa_offset = expr;
2699 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2700 ctx->data += len;
2701 break;
2702 }
2703 case DW_CFA_expression:
2704 case DW_CFA_val_expression:
2705 {
2706 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2707 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2708 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2709 if (!valid_reg(reg)) break;
2710 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2711 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2712 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2713 expr, expr + len);
2714 info->state.regs[reg] = expr;
2715 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
2716 ctx->data += len;
2717 break;
2718 }
2719 case DW_CFA_GNU_args_size:
2720 /* FIXME: should check that GCC is the compiler for this CU */
2721 {
2722 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
2723 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
2724 /* ignored */
2725 break;
2726 }
2727 default:
2728 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
2729 break;
2730 }
2731 }
2732 }
2733
2734 /* retrieve a context register from its dwarf number */
2735 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
2736 {
2737 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2738 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2739
2740 if (sz != sizeof(ULONG_PTR))
2741 {
2742 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2743 return 0;
2744 }
2745 return *ptr;
2746 }
2747
2748 /* set a context register from its dwarf number */
2749 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
2750 ULONG_PTR val, BOOL isdebuggee)
2751 {
2752 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2753 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2754
2755 if (isdebuggee)
2756 {
2757 char tmp[16];
2758
2759 if (sz > sizeof(tmp))
2760 {
2761 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
2762 return;
2763 }
2764 if (!sw_read_mem(csw, val, tmp, sz))
2765 {
2766 WARN("Couldn't read memory at %p\n", (void*)val);
2767 return;
2768 }
2769 memcpy(ptr, tmp, sz);
2770 }
2771 else
2772 {
2773 if (sz != sizeof(ULONG_PTR))
2774 {
2775 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2776 return;
2777 }
2778 *ptr = val;
2779 }
2780 }
2781
2782 /* copy a register from one context to another using dwarf number */
2783 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
2784 {
2785 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst), szdst;
2786 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc), szsrc;
2787 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
2788 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
2789
2790 if (szdst != szsrc)
2791 {
2792 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
2793 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
2794 return;
2795 }
2796 memcpy(ptrdst, ptrsrc, szdst);
2797 }
2798
2799 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
2800 const unsigned char* zp, CONTEXT *context)
2801 {
2802 dwarf2_traverse_context_t ctx;
2803 ULONG_PTR reg, sz, tmp, stack[64];
2804 int sp = -1;
2805 ULONG_PTR len;
2806
2807 ctx.data = zp;
2808 ctx.end_data = zp + 4;
2809 len = dwarf2_leb128_as_unsigned(&ctx);
2810 ctx.end_data = ctx.data + len;
2811 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2812
2813 while (ctx.data < ctx.end_data)
2814 {
2815 unsigned char opcode = dwarf2_parse_byte(&ctx);
2816
2817 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
2818 stack[++sp] = opcode - DW_OP_lit0;
2819 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
2820 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
2821 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
2822 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
2823 else switch (opcode)
2824 {
2825 case DW_OP_nop: break;
2826 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
2827 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
2828 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
2829 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
2830 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
2831 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
2832 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
2833 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
2834 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
2835 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
2836 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
2837 case DW_OP_deref:
2838 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
2839 {
2840 ERR("Couldn't read memory at %lx\n", stack[sp]);
2841 tmp = 0;
2842 }
2843 stack[sp] = tmp;
2844 break;
2845 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
2846 case DW_OP_drop: sp--; break;
2847 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
2848 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
2849 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
2850 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
2851 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
2852 case DW_OP_neg: stack[sp] = -stack[sp]; break;
2853 case DW_OP_not: stack[sp] = ~stack[sp]; break;
2854 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
2855 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
2856 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
2857 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
2858 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
2859 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
2860 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
2861 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
2862 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
2863 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
2864 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
2865 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
2866 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
2867 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
2868 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
2869 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
2870 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
2871 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
2872 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
2873 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
2874 case DW_OP_GNU_encoded_addr:
2875 tmp = dwarf2_parse_byte(&ctx);
2876 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
2877 break;
2878 case DW_OP_regx:
2879 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
2880 break;
2881 case DW_OP_bregx:
2882 reg = dwarf2_leb128_as_unsigned(&ctx);
2883 tmp = dwarf2_leb128_as_signed(&ctx);
2884 stack[++sp] = get_context_reg(context, reg) + tmp;
2885 break;
2886 case DW_OP_deref_size:
2887 sz = dwarf2_parse_byte(&ctx);
2888 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
2889 {
2890 ERR("Couldn't read memory at %lx\n", stack[sp]);
2891 tmp = 0;
2892 }
2893 /* do integral promotion */
2894 switch (sz)
2895 {
2896 case 1: stack[sp] = *(unsigned char*)&tmp; break;
2897 case 2: stack[sp] = *(unsigned short*)&tmp; break;
2898 case 4: stack[sp] = *(unsigned int*)&tmp; break;
2899 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
2900 default: FIXME("Unknown size for deref 0x%lx\n", sz);
2901 }
2902 break;
2903 default:
2904 FIXME("unhandled opcode %02x\n", opcode);
2905 }
2906 }
2907 return stack[sp];
2908 }
2909
2910 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
2911 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa)
2912 {
2913 unsigned int i;
2914 ULONG_PTR value;
2915 CONTEXT new_context = *context;
2916
2917 switch (state->cfa_rule)
2918 {
2919 case RULE_EXPRESSION:
2920 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
2921 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa)))
2922 {
2923 WARN("Couldn't read memory at %p\n", (void*)*cfa);
2924 return;
2925 }
2926 break;
2927 case RULE_VAL_EXPRESSION:
2928 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
2929 break;
2930 default:
2931 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset;
2932 break;
2933 }
2934 if (!*cfa) return;
2935
2936 for (i = 0; i < NB_FRAME_REGS; i++)
2937 {
2938 switch (state->rules[i])
2939 {
2940 case RULE_UNSET:
2941 case RULE_UNDEFINED:
2942 case RULE_SAME:
2943 break;
2944 case RULE_CFA_OFFSET:
2945 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE);
2946 break;
2947 case RULE_OTHER_REG:
2948 copy_context_reg(&new_context, i, context, state->regs[i]);
2949 break;
2950 case RULE_EXPRESSION:
2951 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
2952 set_context_reg(csw, &new_context, i, value, TRUE);
2953 break;
2954 case RULE_VAL_EXPRESSION:
2955 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
2956 set_context_reg(csw, &new_context, i, value, FALSE);
2957 break;
2958 }
2959 }
2960 *context = new_context;
2961 }
2962
2963 /***********************************************************************
2964 * dwarf2_virtual_unwind
2965 *
2966 */
2967 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
2968 {
2969 struct module_pair pair;
2970 struct frame_info info;
2971 dwarf2_traverse_context_t cie_ctx, fde_ctx;
2972 struct module_format* modfmt;
2973 const unsigned char* end;
2974 DWORD_PTR delta;
2975
2976 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
2977 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
2978 !module_get_debug(&pair))
2979 return FALSE;
2980 modfmt = pair.effective->format_info[DFI_DWARF];
2981 if (!modfmt) return FALSE;
2982 memset(&info, 0, sizeof(info));
2983 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
2984 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
2985 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
2986 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
2987 * in this process the IMAGE section at a different address as the one expected by
2988 * the image
2989 */
2990 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
2991 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
2992 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
2993 {
2994 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
2995 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
2996 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
2997 delta = pair.effective->reloc_delta;
2998 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
2999 {
3000 TRACE("Couldn't find information for %lx\n", ip);
3001 return FALSE;
3002 }
3003 }
3004
3005 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
3006 ip, info.ip, info.code_align, info.data_align,
3007 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg)));
3008
3009 /* if at very beginning of function, return and use default unwinder */
3010 if (ip == info.ip) return FALSE;
3011 execute_cfa_instructions(&cie_ctx, ip, &info);
3012
3013 if (info.aug_z_format) /* get length of augmentation data */
3014 {
3015 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
3016 end = fde_ctx.data + len;
3017 }
3018 else end = NULL;
3019 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
3020 if (end) fde_ctx.data = end;
3021
3022 execute_cfa_instructions(&fde_ctx, ip, &info);
3023 apply_frame_state(pair.effective, csw, context, &info.state, cfa);
3024
3025 return TRUE;
3026 }
3027
3028 static void dwarf2_location_compute(struct process* pcs,
3029 const struct module_format* modfmt,
3030 const struct symt_function* func,
3031 struct location* loc)
3032 {
3033 struct location frame;
3034 DWORD_PTR ip;
3035 int err;
3036 dwarf2_traverse_context_t lctx;
3037
3038 if (!func->container || func->container->tag != SymTagCompiland)
3039 {
3040 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
3041 err = loc_err_internal;
3042 }
3043 else
3044 {
3045 /* instruction pointer relative to compiland's start */
3046 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
3047
3048 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
3049 {
3050 switch (loc->kind)
3051 {
3052 case loc_dwarf2_location_list:
3053 /* Then, if the variable has a location list, find it !! */
3054 if (dwarf2_lookup_loclist(modfmt,
3055 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
3056 ip, &lctx))
3057 goto do_compute;
3058 err = loc_err_out_of_scope;
3059 break;
3060 case loc_dwarf2_block:
3061 /* or if we have a copy of an existing block, get ready for it */
3062 {
3063 unsigned* ptr = (unsigned*)loc->offset;
3064
3065 lctx.data = (const BYTE*)(ptr + 1);
3066 lctx.end_data = lctx.data + *ptr;
3067 lctx.word_size = modfmt->u.dwarf2_info->word_size;
3068 }
3069 do_compute:
3070 /* now get the variable */
3071 err = compute_location(&lctx, loc, pcs->handle, &frame);
3072 break;
3073 case loc_register:
3074 case loc_regrel:
3075 /* nothing to do */
3076 break;
3077 default:
3078 WARN("Unsupported local kind %d\n", loc->kind);
3079 err = loc_err_internal;
3080 }
3081 }
3082 }
3083 if (err < 0)
3084 {
3085 loc->kind = loc_register;
3086 loc->reg = err;
3087 }
3088 }
3089
3090 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3091 {
3092 HeapFree(GetProcessHeap(), 0, modfmt);
3093 }
3094
3095 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
3096 const char* sectname, struct image_section_map* ism)
3097 {
3098 struct image_section_map local_ism;
3099
3100 if (!ism) ism = &local_ism;
3101 if (!image_find_section(fmap, sectname, ism))
3102 {
3103 section->address = NULL;
3104 section->size = 0;
3105 section->rva = 0;
3106 return FALSE;
3107 }
3108
3109 section->address = (const BYTE*)image_map_section(ism);
3110 section->size = image_get_map_size(ism);
3111 section->rva = image_get_map_rva(ism);
3112 return TRUE;
3113 }
3114
3115 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
3116 const struct elf_thunk_area* thunks,
3117 struct image_file_map* fmap)
3118 {
3119 dwarf2_section_t section[section_max];
3120 dwarf2_traverse_context_t mod_ctx;
3121 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3122 debug_line_sect;
3123 BOOL ret = TRUE;
3124 struct module_format* dwarf2_modfmt;
3125
3126 if (!dwarf2_init_section(&section[section_debug], fmap, ".debug_info", &debug_sect))
3127 /* no Dwarf debug info here */
3128 return FALSE;
3129
3130 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", &debug_abbrev_sect);
3131 dwarf2_init_section(&section[section_string], fmap, ".debug_str", &debug_str_sect);
3132 dwarf2_init_section(&section[section_line], fmap, ".debug_line", &debug_line_sect);
3133
3134 if (section[section_debug].address == IMAGE_NO_MAP ||
3135 section[section_abbrev].address == IMAGE_NO_MAP ||
3136 section[section_string].address == IMAGE_NO_MAP)
3137 {
3138 ret = FALSE;
3139 goto leave;
3140 }
3141
3142 if (fmap->modtype == DMT_ELF)
3143 {
3144 /* debug info might have a different base address than .so file
3145 * when elf file is prelinked after splitting off debug info
3146 * adjust symbol base addresses accordingly
3147 */
3148 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3149 }
3150
3151 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3152
3153 mod_ctx.data = section[section_debug].address;
3154 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3155 mod_ctx.word_size = 0; /* will be correctly set later on */
3156
3157 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3158 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3159 if (!dwarf2_modfmt)
3160 {
3161 ret = FALSE;
3162 goto leave;
3163 }
3164 dwarf2_modfmt->module = module;
3165 dwarf2_modfmt->remove = dwarf2_module_remove;
3166 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3167 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3168 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3169 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3170
3171 /* As we'll need later some sections' content, we won't unmap these
3172 * sections upon existing this function
3173 */
3174 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", NULL);
3175 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", NULL);
3176 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->eh_frame, fmap, ".eh_frame", NULL);
3177
3178 while (mod_ctx.data < mod_ctx.end_data)
3179 {
3180 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3181 }
3182 dwarf2_modfmt->module->module.SymType = SymDia;
3183 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3184 /* FIXME: we could have a finer grain here */
3185 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3186 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3187 dwarf2_modfmt->module->module.SourceIndexed = TRUE;
3188 dwarf2_modfmt->module->module.Publics = TRUE;
3189
3190 leave:
3191 image_unmap_section(&debug_sect);
3192 image_unmap_section(&debug_abbrev_sect);
3193 image_unmap_section(&debug_str_sect);
3194 image_unmap_section(&debug_line_sect);
3195
3196 return ret;
3197 }
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