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[DBGHELP] Sync with Wine Staging 1.7.55. CORE-10536
[reactos.git] / reactos / dll / win32 / dbghelp / dwarf.c
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2011, Eric Pouech
6 * Copyright (C) 2010, Alexandre Julliard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #include "dbghelp_private.h"
24
25 #ifdef HAVE_ZLIB
26 #include <zlib.h>
27 #endif
28
29 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
30
31 /* FIXME:
32 * - Functions:
33 * o unspecified parameters
34 * o inlined functions
35 * o Debug{Start|End}Point
36 * o CFA
37 * - Udt
38 * o proper types loading (nesting)
39 */
40
41 #if 0
42 static void dump(const void* ptr, unsigned len)
43 {
44 int i, j;
45 BYTE msg[128];
46 static const char hexof[] = "0123456789abcdef";
47 const BYTE* x = ptr;
48
49 for (i = 0; i < len; i += 16)
50 {
51 sprintf(msg, "%08x: ", i);
52 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
53 for (j = 0; j < min(16, len - i); j++)
54 {
55 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
56 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
57 msg[10 + 3 * j + 2] = ' ';
58 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
59 x[i + j] : '.';
60 }
61 msg[10 + 3 * 16] = ' ';
62 msg[10 + 3 * 16 + 1 + 16] = '\0';
63 TRACE("%s\n", msg);
64 }
65 }
66 #endif
67
68 /**
69 *
70 * Main Specs:
71 * http://www.eagercon.com/dwarf/dwarf3std.htm
72 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
73 *
74 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
75 *
76 * example of projects who do dwarf2 parsing:
77 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
78 * http://elis.ugent.be/diota/log/ltrace_elf.c
79 */
80 #include "dwarf.h"
81
82 /**
83 * Parsers
84 */
85
86 typedef struct dwarf2_abbrev_entry_attr_s
87 {
88 unsigned long attribute;
89 unsigned long form;
90 struct dwarf2_abbrev_entry_attr_s* next;
91 } dwarf2_abbrev_entry_attr_t;
92
93 typedef struct dwarf2_abbrev_entry_s
94 {
95 unsigned long entry_code;
96 unsigned long tag;
97 unsigned char have_child;
98 unsigned num_attr;
99 dwarf2_abbrev_entry_attr_t* attrs;
100 } dwarf2_abbrev_entry_t;
101
102 struct dwarf2_block
103 {
104 unsigned size;
105 const unsigned char* ptr;
106 };
107
108 struct attribute
109 {
110 unsigned long form;
111 enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from;
112 union
113 {
114 unsigned long uvalue;
115 ULONGLONG lluvalue;
116 long svalue;
117 const char* string;
118 struct dwarf2_block block;
119 } u;
120 };
121
122 typedef struct dwarf2_debug_info_s
123 {
124 const dwarf2_abbrev_entry_t*abbrev;
125 struct symt* symt;
126 const unsigned char** data;
127 struct vector children;
128 struct dwarf2_debug_info_s* parent;
129 } dwarf2_debug_info_t;
130
131 typedef struct dwarf2_section_s
132 {
133 BOOL compressed;
134 const unsigned char* address;
135 unsigned size;
136 DWORD_PTR rva;
137 } dwarf2_section_t;
138
139 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max};
140
141 typedef struct dwarf2_traverse_context_s
142 {
143 const unsigned char* data;
144 const unsigned char* end_data;
145 unsigned char word_size;
146 } dwarf2_traverse_context_t;
147
148 /* symt_cache indexes */
149 #define sc_void 0
150 #define sc_int1 1
151 #define sc_int2 2
152 #define sc_int4 3
153 #define sc_num 4
154
155 typedef struct dwarf2_parse_context_s
156 {
157 const dwarf2_section_t* sections;
158 unsigned section;
159 struct pool pool;
160 struct module* module;
161 struct symt_compiland* compiland;
162 const struct elf_thunk_area*thunks;
163 struct sparse_array abbrev_table;
164 struct sparse_array debug_info_table;
165 unsigned long load_offset;
166 unsigned long ref_offset;
167 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
168 char* cpp_name;
169 } dwarf2_parse_context_t;
170
171 /* stored in the dbghelp's module internal structure for later reuse */
172 struct dwarf2_module_info_s
173 {
174 dwarf2_section_t debug_loc;
175 dwarf2_section_t debug_frame;
176 dwarf2_section_t eh_frame;
177 unsigned char word_size;
178 };
179
180 #define loc_dwarf2_location_list (loc_user + 0)
181 #define loc_dwarf2_block (loc_user + 1)
182
183 /* forward declarations */
184 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
185
186 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
187 {
188 return *ptr;
189 }
190
191 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
192 {
193 unsigned char uvalue = dwarf2_get_byte(ctx->data);
194 ctx->data += 1;
195 return uvalue;
196 }
197
198 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
199 {
200 return *(const UINT16*)ptr;
201 }
202
203 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
204 {
205 unsigned short uvalue = dwarf2_get_u2(ctx->data);
206 ctx->data += 2;
207 return uvalue;
208 }
209
210 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
211 {
212 return *(const UINT32*)ptr;
213 }
214
215 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
216 {
217 unsigned long uvalue = dwarf2_get_u4(ctx->data);
218 ctx->data += 4;
219 return uvalue;
220 }
221
222 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
223 {
224 return *(const UINT64*)ptr;
225 }
226
227 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
228 {
229 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
230 ctx->data += 8;
231 return uvalue;
232 }
233
234 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
235 {
236 unsigned long ret = 0;
237 unsigned char byte;
238 unsigned shift = 0;
239
240 do
241 {
242 byte = dwarf2_get_byte(ptr++);
243 ret |= (byte & 0x7f) << shift;
244 shift += 7;
245 } while (byte & 0x80);
246
247 if (end) *end = ptr;
248 return ret;
249 }
250
251 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
252 {
253 unsigned long ret;
254
255 assert(ctx);
256
257 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
258
259 return ret;
260 }
261
262 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
263 {
264 long ret = 0;
265 unsigned char byte;
266 unsigned shift = 0;
267 const unsigned size = sizeof(int) * 8;
268
269 do
270 {
271 byte = dwarf2_get_byte(ptr++);
272 ret |= (byte & 0x7f) << shift;
273 shift += 7;
274 } while (byte & 0x80);
275 if (end) *end = ptr;
276
277 /* as spec: sign bit of byte is 2nd high order bit (80x40)
278 * -> 0x80 is used as flag.
279 */
280 if ((shift < size) && (byte & 0x40))
281 {
282 ret |= - (1 << shift);
283 }
284 return ret;
285 }
286
287 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
288 {
289 long ret = 0;
290
291 assert(ctx);
292
293 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
294 return ret;
295 }
296
297 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
298 {
299 unsigned ret;
300 for (ret = 0; ctx->data[ret] & 0x80; ret++);
301 return ret + 1;
302 }
303
304 /******************************************************************
305 * dwarf2_get_addr
306 *
307 * Returns an address.
308 * We assume that in all cases word size from Dwarf matches the size of
309 * addresses in platform where the exec is compiled.
310 */
311 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
312 {
313 unsigned long ret;
314
315 switch (word_size)
316 {
317 case 4:
318 ret = dwarf2_get_u4(ptr);
319 break;
320 case 8:
321 ret = dwarf2_get_u8(ptr);
322 break;
323 default:
324 FIXME("Unsupported Word Size %u\n", word_size);
325 ret = 0;
326 }
327 return ret;
328 }
329
330 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
331 {
332 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
333 ctx->data += ctx->word_size;
334 return ret;
335 }
336
337 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
338 {
339 return wine_dbg_sprintf("ctx(%p)", ctx->data);
340 }
341
342 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
343 {
344 return wine_dbg_sprintf("ctx(%p,%s)",
345 ctx, debugstr_w(ctx->module->module.ModuleName));
346 }
347
348 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
349 {
350 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
351 di->abbrev, di->symt);
352 }
353
354 static dwarf2_abbrev_entry_t*
355 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
356 unsigned long entry_code)
357 {
358 assert( NULL != abbrev_table );
359 return sparse_array_find(abbrev_table, entry_code);
360 }
361
362 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
363 struct sparse_array* abbrev_table,
364 struct pool* pool)
365 {
366 unsigned long entry_code;
367 dwarf2_abbrev_entry_t* abbrev_entry;
368 dwarf2_abbrev_entry_attr_t* new = NULL;
369 dwarf2_abbrev_entry_attr_t* last = NULL;
370 unsigned long attribute;
371 unsigned long form;
372
373 assert( NULL != abbrev_ctx );
374
375 TRACE("%s, end at %p\n",
376 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
377
378 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
379 while (abbrev_ctx->data < abbrev_ctx->end_data)
380 {
381 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
382 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
383 TRACE("found entry_code %lu\n", entry_code);
384 if (!entry_code)
385 {
386 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
387 break;
388 }
389 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
390 assert( NULL != abbrev_entry );
391
392 abbrev_entry->entry_code = entry_code;
393 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
394 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
395 abbrev_entry->attrs = NULL;
396 abbrev_entry->num_attr = 0;
397
398 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
399 abbrev_table, sparse_array_length(abbrev_table),
400 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
401
402 last = NULL;
403 while (1)
404 {
405 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
406 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
407 if (!attribute) break;
408
409 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
410 assert(new);
411
412 new->attribute = attribute;
413 new->form = form;
414 new->next = NULL;
415 if (abbrev_entry->attrs) last->next = new;
416 else abbrev_entry->attrs = new;
417 last = new;
418 abbrev_entry->num_attr++;
419 }
420 }
421 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
422 }
423
424 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
425 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
426 {
427 unsigned step;
428
429 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
430
431 switch (abbrev_attr->form)
432 {
433 case DW_FORM_ref_addr:
434 case DW_FORM_addr: step = ctx->word_size; break;
435 case DW_FORM_flag:
436 case DW_FORM_data1:
437 case DW_FORM_ref1: step = 1; break;
438 case DW_FORM_data2:
439 case DW_FORM_ref2: step = 2; break;
440 case DW_FORM_data4:
441 case DW_FORM_ref4:
442 case DW_FORM_strp: step = 4; break;
443 case DW_FORM_data8:
444 case DW_FORM_ref8: step = 8; break;
445 case DW_FORM_sdata:
446 case DW_FORM_ref_udata:
447 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
448 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
449 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
450 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
451 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
452 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
453 default:
454 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
455 return;
456 }
457 ctx->data += step;
458 }
459
460 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
461 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
462 const unsigned char* data,
463 struct attribute* attr)
464 {
465 attr->form = abbrev_attr->form;
466 switch (attr->form)
467 {
468 case DW_FORM_ref_addr:
469 case DW_FORM_addr:
470 attr->u.uvalue = dwarf2_get_addr(data,
471 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
472 TRACE("addr<0x%lx>\n", attr->u.uvalue);
473 break;
474
475 case DW_FORM_flag:
476 attr->u.uvalue = dwarf2_get_byte(data);
477 TRACE("flag<0x%lx>\n", attr->u.uvalue);
478 break;
479
480 case DW_FORM_data1:
481 attr->u.uvalue = dwarf2_get_byte(data);
482 TRACE("data1<%lu>\n", attr->u.uvalue);
483 break;
484
485 case DW_FORM_data2:
486 attr->u.uvalue = dwarf2_get_u2(data);
487 TRACE("data2<%lu>\n", attr->u.uvalue);
488 break;
489
490 case DW_FORM_data4:
491 attr->u.uvalue = dwarf2_get_u4(data);
492 TRACE("data4<%lu>\n", attr->u.uvalue);
493 break;
494
495 case DW_FORM_data8:
496 attr->u.lluvalue = dwarf2_get_u8(data);
497 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
498 break;
499
500 case DW_FORM_ref1:
501 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
502 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
503 break;
504
505 case DW_FORM_ref2:
506 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
507 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
508 break;
509
510 case DW_FORM_ref4:
511 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
512 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
513 break;
514
515 case DW_FORM_ref8:
516 FIXME("Unhandled 64-bit support\n");
517 break;
518
519 case DW_FORM_sdata:
520 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
521 break;
522
523 case DW_FORM_ref_udata:
524 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
525 break;
526
527 case DW_FORM_udata:
528 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
529 break;
530
531 case DW_FORM_string:
532 attr->u.string = (const char *)data;
533 TRACE("string<%s>\n", attr->u.string);
534 break;
535
536 case DW_FORM_strp:
537 {
538 unsigned long offset = dwarf2_get_u4(data);
539 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
540 }
541 TRACE("strp<%s>\n", attr->u.string);
542 break;
543
544 case DW_FORM_block:
545 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
546 break;
547
548 case DW_FORM_block1:
549 attr->u.block.size = dwarf2_get_byte(data);
550 attr->u.block.ptr = data + 1;
551 break;
552
553 case DW_FORM_block2:
554 attr->u.block.size = dwarf2_get_u2(data);
555 attr->u.block.ptr = data + 2;
556 break;
557
558 case DW_FORM_block4:
559 attr->u.block.size = dwarf2_get_u4(data);
560 attr->u.block.ptr = data + 4;
561 break;
562
563 default:
564 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
565 break;
566 }
567 }
568
569 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
570 const dwarf2_debug_info_t* di,
571 unsigned at, struct attribute* attr)
572 {
573 unsigned i, refidx = 0;
574 dwarf2_abbrev_entry_attr_t* abbrev_attr;
575 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL;
576
577 attr->gotten_from = attr_direct;
578 while (di)
579 {
580 ref_abbrev_attr = NULL;
581 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
582 {
583 if (abbrev_attr->attribute == at)
584 {
585 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
586 return TRUE;
587 }
588 if ((abbrev_attr->attribute == DW_AT_abstract_origin ||
589 abbrev_attr->attribute == DW_AT_specification) &&
590 at != DW_AT_sibling)
591 {
592 if (ref_abbrev_attr)
593 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute);
594 ref_abbrev_attr = abbrev_attr;
595 refidx = i;
596 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ?
597 attr_abstract_origin : attr_specification;
598 }
599 }
600 /* do we have either an abstract origin or a specification debug entry to look into ? */
601 if (!ref_abbrev_attr) break;
602 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr);
603 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
604 FIXME("Should have found the debug info entry\n");
605 }
606 return FALSE;
607 }
608
609 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*);
610
611 #define Wine_DW_no_register 0x7FFFFFFF
612
613 static unsigned dwarf2_map_register(int regno)
614 {
615 if (regno == Wine_DW_no_register)
616 {
617 FIXME("What the heck map reg 0x%x\n",regno);
618 return 0;
619 }
620 return dbghelp_current_cpu->map_dwarf_register(regno, FALSE);
621 }
622
623 static enum location_error
624 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
625 HANDLE hproc, const struct location* frame)
626 {
627 DWORD_PTR tmp, stack[64];
628 unsigned stk;
629 unsigned char op;
630 BOOL piece_found = FALSE;
631
632 stack[stk = 0] = 0;
633
634 loc->kind = loc_absolute;
635 loc->reg = Wine_DW_no_register;
636
637 while (ctx->data < ctx->end_data)
638 {
639 op = dwarf2_parse_byte(ctx);
640
641 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
642 stack[++stk] = op - DW_OP_lit0;
643 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
644 {
645 /* dbghelp APIs don't know how to cope with this anyway
646 * (for example 'long long' stored in two registers)
647 * FIXME: We should tell winedbg how to deal with it (sigh)
648 */
649 if (!piece_found)
650 {
651 DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0);
652 if (loc->reg != Wine_DW_no_register)
653 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n",
654 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
655 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
656 loc->reg = cvreg;
657 }
658 loc->kind = loc_register;
659 }
660 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
661 {
662 /* dbghelp APIs don't know how to cope with this anyway
663 * (for example 'long long' stored in two registers)
664 * FIXME: We should tell winedbg how to deal with it (sigh)
665 */
666 if (!piece_found)
667 {
668 DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0);
669 if (loc->reg != Wine_DW_no_register)
670 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n",
671 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
672 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
673 loc->reg = cvreg;
674 }
675 stack[++stk] = dwarf2_leb128_as_signed(ctx);
676 loc->kind = loc_regrel;
677 }
678 else switch (op)
679 {
680 case DW_OP_nop: break;
681 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
682 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
683 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
684 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
685 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
686 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
687 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
688 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
689 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
690 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
691 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
692 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
693 case DW_OP_drop: stk--; break;
694 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
695 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
696 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
697 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
698 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
699 case DW_OP_neg: stack[stk] = -stack[stk]; break;
700 case DW_OP_not: stack[stk] = ~stack[stk]; break;
701 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
702 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
703 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
704 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
705 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
706 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
707 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
708 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
709 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
710 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
711 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
712 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
713 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
714 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
715 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
716 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
717 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
718 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
719 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
720 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
721 case DW_OP_regx:
722 tmp = dwarf2_leb128_as_unsigned(ctx);
723 if (!piece_found)
724 {
725 if (loc->reg != Wine_DW_no_register)
726 FIXME("Only supporting one reg\n");
727 loc->reg = dwarf2_map_register(tmp);
728 }
729 loc->kind = loc_register;
730 break;
731 case DW_OP_bregx:
732 tmp = dwarf2_leb128_as_unsigned(ctx);
733 if (loc->reg != Wine_DW_no_register)
734 FIXME("Only supporting one regx\n");
735 loc->reg = dwarf2_map_register(tmp);
736 stack[++stk] = dwarf2_leb128_as_signed(ctx);
737 loc->kind = loc_regrel;
738 break;
739 case DW_OP_fbreg:
740 if (loc->reg != Wine_DW_no_register)
741 FIXME("Only supporting one reg (%s/%d -> -2)\n",
742 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg);
743 if (frame && frame->kind == loc_register)
744 {
745 loc->kind = loc_regrel;
746 loc->reg = frame->reg;
747 stack[++stk] = dwarf2_leb128_as_signed(ctx);
748 }
749 else if (frame && frame->kind == loc_regrel)
750 {
751 loc->kind = loc_regrel;
752 loc->reg = frame->reg;
753 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
754 }
755 else
756 {
757 /* FIXME: this could be later optimized by not recomputing
758 * this very location expression
759 */
760 loc->kind = loc_dwarf2_block;
761 stack[++stk] = dwarf2_leb128_as_signed(ctx);
762 }
763 break;
764 case DW_OP_piece:
765 {
766 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
767 WARN("Not handling OP_piece (size=%d)\n", sz);
768 piece_found = TRUE;
769 }
770 break;
771 case DW_OP_deref:
772 if (!stk)
773 {
774 FIXME("Unexpected empty stack\n");
775 return loc_err_internal;
776 }
777 if (loc->reg != Wine_DW_no_register)
778 {
779 WARN("Too complex expression for deref\n");
780 return loc_err_too_complex;
781 }
782 if (hproc)
783 {
784 DWORD_PTR addr = stack[stk--];
785 DWORD_PTR deref;
786
787 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
788 {
789 WARN("Couldn't read memory at %lx\n", addr);
790 return loc_err_cant_read;
791 }
792 stack[++stk] = deref;
793 }
794 else
795 {
796 loc->kind = loc_dwarf2_block;
797 }
798 break;
799 case DW_OP_deref_size:
800 if (!stk)
801 {
802 FIXME("Unexpected empty stack\n");
803 return loc_err_internal;
804 }
805 if (loc->reg != Wine_DW_no_register)
806 {
807 WARN("Too complex expression for deref\n");
808 return loc_err_too_complex;
809 }
810 if (hproc)
811 {
812 DWORD_PTR addr = stack[stk--];
813 BYTE derefsize = dwarf2_parse_byte(ctx);
814 DWORD64 deref;
815
816 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
817 {
818 WARN("Couldn't read memory at %lx\n", addr);
819 return loc_err_cant_read;
820 }
821
822 switch (derefsize)
823 {
824 case 1: stack[++stk] = *(unsigned char*)&deref; break;
825 case 2: stack[++stk] = *(unsigned short*)&deref; break;
826 case 4: stack[++stk] = *(DWORD*)&deref; break;
827 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
828 }
829 }
830 else
831 {
832 dwarf2_parse_byte(ctx);
833 loc->kind = loc_dwarf2_block;
834 }
835 break;
836 case DW_OP_stack_value:
837 /* Expected behaviour is that this is the last instruction of this
838 * expression and just the "top of stack" value should be put to loc->offset. */
839 break;
840 default:
841 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
842 FIXME("Unhandled attr op: %x\n", op);
843 /* FIXME else unhandled extension */
844 return loc_err_internal;
845 }
846 }
847 loc->offset = stack[stk];
848 return 0;
849 }
850
851 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
852 const dwarf2_debug_info_t* di,
853 unsigned long dw,
854 struct location* loc,
855 const struct location* frame)
856 {
857 struct attribute xloc;
858
859 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
860
861 switch (xloc.form)
862 {
863 case DW_FORM_data1: case DW_FORM_data2:
864 case DW_FORM_udata: case DW_FORM_sdata:
865 loc->kind = loc_absolute;
866 loc->reg = 0;
867 loc->offset = xloc.u.uvalue;
868 return TRUE;
869 case DW_FORM_data4: case DW_FORM_data8:
870 loc->kind = loc_dwarf2_location_list;
871 loc->reg = Wine_DW_no_register;
872 loc->offset = xloc.u.uvalue;
873 return TRUE;
874 case DW_FORM_block:
875 case DW_FORM_block1:
876 case DW_FORM_block2:
877 case DW_FORM_block4:
878 break;
879 default: FIXME("Unsupported yet form %lx\n", xloc.form);
880 return FALSE;
881 }
882
883 /* assume we have a block form */
884
885 if (xloc.u.block.size)
886 {
887 dwarf2_traverse_context_t lctx;
888 enum location_error err;
889
890 lctx.data = xloc.u.block.ptr;
891 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
892 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
893
894 err = compute_location(&lctx, loc, NULL, frame);
895 if (err < 0)
896 {
897 loc->kind = loc_error;
898 loc->reg = err;
899 }
900 else if (loc->kind == loc_dwarf2_block)
901 {
902 unsigned* ptr = pool_alloc(&ctx->module->pool,
903 sizeof(unsigned) + xloc.u.block.size);
904 *ptr = xloc.u.block.size;
905 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
906 loc->offset = (unsigned long)ptr;
907 }
908 }
909 return TRUE;
910 }
911
912 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
913 const dwarf2_debug_info_t* di)
914 {
915 struct attribute attr;
916 dwarf2_debug_info_t* type;
917
918 if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
919 return NULL;
920 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
921 {
922 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
923 return NULL;
924 }
925 if (!type->symt)
926 {
927 /* load the debug info entity */
928 dwarf2_load_one_entry(ctx, type);
929 if (!type->symt)
930 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
931 }
932 return type->symt;
933 }
934
935 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name)
936 {
937 char* last;
938 struct attribute diname;
939 struct attribute spec;
940
941 if (di->abbrev->tag == DW_TAG_compile_unit) return name;
942 if (!ctx->cpp_name)
943 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME);
944 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1;
945 strcpy(last, name);
946
947 /* if the di is a definition, but has also a (previous) declaration, then scope must
948 * be gotten from declaration not definition
949 */
950 if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct)
951 {
952 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue);
953 if (!di)
954 {
955 FIXME("Should have found the debug info entry\n");
956 return NULL;
957 }
958 }
959
960 for (di = di->parent; di; di = di->parent)
961 {
962 switch (di->abbrev->tag)
963 {
964 case DW_TAG_namespace:
965 case DW_TAG_structure_type:
966 case DW_TAG_class_type:
967 case DW_TAG_interface_type:
968 case DW_TAG_union_type:
969 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname))
970 {
971 size_t len = strlen(diname.u.string);
972 last -= 2 + len;
973 if (last < ctx->cpp_name) return NULL;
974 memcpy(last, diname.u.string, len);
975 last[len] = last[len + 1] = ':';
976 }
977 break;
978 default:
979 break;
980 }
981 }
982 return last;
983 }
984
985 /******************************************************************
986 * dwarf2_read_range
987 *
988 * read a range for a given debug_info (either using AT_range attribute, in which
989 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
990 * in all cases, range is relative to beginning of compilation unit
991 */
992 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di,
993 unsigned long* plow, unsigned long* phigh)
994 {
995 struct attribute range;
996
997 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range))
998 {
999 dwarf2_traverse_context_t traverse;
1000 unsigned long low, high;
1001
1002 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
1003 traverse.end_data = ctx->sections[section_ranges].address +
1004 ctx->sections[section_ranges].size;
1005 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1006
1007 *plow = ULONG_MAX;
1008 *phigh = 0;
1009 while (traverse.data + 2 * traverse.word_size < traverse.end_data)
1010 {
1011 low = dwarf2_parse_addr(&traverse);
1012 high = dwarf2_parse_addr(&traverse);
1013 if (low == 0 && high == 0) break;
1014 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
1015 if (low < *plow) *plow = low;
1016 if (high > *phigh) *phigh = high;
1017 }
1018 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
1019 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
1020
1021 return TRUE;
1022 }
1023 else
1024 {
1025 struct attribute low_pc;
1026 struct attribute high_pc;
1027
1028 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
1029 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
1030 return FALSE;
1031 *plow = low_pc.u.uvalue;
1032 *phigh = high_pc.u.uvalue;
1033 return TRUE;
1034 }
1035 }
1036
1037 /******************************************************************
1038 * dwarf2_read_one_debug_info
1039 *
1040 * Loads into memory one debug info entry, and recursively its children (if any)
1041 */
1042 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
1043 dwarf2_traverse_context_t* traverse,
1044 dwarf2_debug_info_t* parent_di,
1045 dwarf2_debug_info_t** pdi)
1046 {
1047 const dwarf2_abbrev_entry_t*abbrev;
1048 unsigned long entry_code;
1049 unsigned long offset;
1050 dwarf2_debug_info_t* di;
1051 dwarf2_debug_info_t* child;
1052 dwarf2_debug_info_t** where;
1053 dwarf2_abbrev_entry_attr_t* attr;
1054 unsigned i;
1055 struct attribute sibling;
1056
1057 offset = traverse->data - ctx->sections[ctx->section].address;
1058 entry_code = dwarf2_leb128_as_unsigned(traverse);
1059 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
1060 if (!entry_code)
1061 {
1062 *pdi = NULL;
1063 return TRUE;
1064 }
1065 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
1066 if (!abbrev)
1067 {
1068 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
1069 return FALSE;
1070 }
1071 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
1072 if (!di) return FALSE;
1073 di->abbrev = abbrev;
1074 di->symt = NULL;
1075 di->parent = parent_di;
1076
1077 if (abbrev->num_attr)
1078 {
1079 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
1080 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
1081 {
1082 di->data[i] = traverse->data;
1083 dwarf2_swallow_attribute(traverse, attr);
1084 }
1085 }
1086 else di->data = NULL;
1087 if (abbrev->have_child)
1088 {
1089 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
1090 while (traverse->data < traverse->end_data)
1091 {
1092 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE;
1093 if (!child) break;
1094 where = vector_add(&di->children, &ctx->pool);
1095 if (!where) return FALSE;
1096 *where = child;
1097 }
1098 }
1099 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1100 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1101 {
1102 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1103 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1104 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1105 }
1106 *pdi = di;
1107 return TRUE;
1108 }
1109
1110 static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx,
1111 dwarf2_debug_info_t* di)
1112 {
1113 struct attribute spec;
1114
1115 while (di)
1116 {
1117 if (di->abbrev->have_child)
1118 return &di->children;
1119 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break;
1120 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue)))
1121 FIXME("Should have found the debug info entry\n");
1122 }
1123 return NULL;
1124 }
1125
1126 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1127 dwarf2_debug_info_t* di)
1128 {
1129 struct attribute name;
1130 struct attribute size;
1131 struct attribute encoding;
1132 enum BasicType bt;
1133 int cache_idx = -1;
1134 if (di->symt) return di->symt;
1135
1136 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1137
1138 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1139 name.u.string = NULL;
1140 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1141 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1142
1143 switch (encoding.u.uvalue)
1144 {
1145 case DW_ATE_void: bt = btVoid; break;
1146 case DW_ATE_address: bt = btULong; break;
1147 case DW_ATE_boolean: bt = btBool; break;
1148 case DW_ATE_complex_float: bt = btComplex; break;
1149 case DW_ATE_float: bt = btFloat; break;
1150 case DW_ATE_signed: bt = btInt; break;
1151 case DW_ATE_unsigned: bt = btUInt; break;
1152 case DW_ATE_signed_char: bt = btChar; break;
1153 case DW_ATE_unsigned_char: bt = btChar; break;
1154 default: bt = btNoType; break;
1155 }
1156 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1157 switch (bt)
1158 {
1159 case btVoid:
1160 assert(size.u.uvalue == 0);
1161 cache_idx = sc_void;
1162 break;
1163 case btInt:
1164 switch (size.u.uvalue)
1165 {
1166 case 1: cache_idx = sc_int1; break;
1167 case 2: cache_idx = sc_int2; break;
1168 case 4: cache_idx = sc_int4; break;
1169 }
1170 break;
1171 default: break;
1172 }
1173 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1174 ctx->symt_cache[cache_idx] = di->symt;
1175
1176 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1177 return di->symt;
1178 }
1179
1180 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1181 dwarf2_debug_info_t* di)
1182 {
1183 struct symt* ref_type;
1184 struct attribute name;
1185
1186 if (di->symt) return di->symt;
1187
1188 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1189
1190 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1191 ref_type = dwarf2_lookup_type(ctx, di);
1192
1193 if (name.u.string)
1194 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1195 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1196 return di->symt;
1197 }
1198
1199 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1200 dwarf2_debug_info_t* di)
1201 {
1202 struct symt* ref_type;
1203 struct attribute size;
1204
1205 if (di->symt) return di->symt;
1206
1207 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1208
1209 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
1210 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1211 {
1212 ref_type = ctx->symt_cache[sc_void];
1213 assert(ref_type);
1214 }
1215 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
1216 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1217 return di->symt;
1218 }
1219
1220 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1221 dwarf2_debug_info_t* di)
1222 {
1223 struct symt* ref_type;
1224 struct symt* idx_type = NULL;
1225 struct attribute min, max, cnt;
1226 dwarf2_debug_info_t* child;
1227 unsigned int i;
1228 const struct vector* children;
1229
1230 if (di->symt) return di->symt;
1231
1232 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1233
1234 ref_type = dwarf2_lookup_type(ctx, di);
1235
1236 if (!(children = dwarf2_get_di_children(ctx, di)))
1237 {
1238 /* fake an array with unknown size */
1239 /* FIXME: int4 even on 64bit machines??? */
1240 idx_type = ctx->symt_cache[sc_int4];
1241 min.u.uvalue = 0;
1242 max.u.uvalue = -1;
1243 }
1244 else for (i = 0; i < vector_length(children); i++)
1245 {
1246 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1247 switch (child->abbrev->tag)
1248 {
1249 case DW_TAG_subrange_type:
1250 idx_type = dwarf2_lookup_type(ctx, child);
1251 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1252 min.u.uvalue = 0;
1253 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1254 max.u.uvalue = 0;
1255 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1256 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1257 break;
1258 default:
1259 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1260 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1261 break;
1262 }
1263 }
1264 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1265 return di->symt;
1266 }
1267
1268 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1269 dwarf2_debug_info_t* di)
1270 {
1271 struct symt* ref_type;
1272
1273 if (di->symt) return di->symt;
1274
1275 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1276
1277 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1278 {
1279 ref_type = ctx->symt_cache[sc_void];
1280 assert(ref_type);
1281 }
1282 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1283 di->symt = ref_type;
1284
1285 return ref_type;
1286 }
1287
1288 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1289 dwarf2_debug_info_t* di)
1290 {
1291 struct symt* ref_type;
1292
1293 if (di->symt) return di->symt;
1294
1295 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1296
1297 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1298 {
1299 ref_type = ctx->symt_cache[sc_void];
1300 assert(ref_type);
1301 }
1302 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1303 di->symt = ref_type;
1304
1305 return ref_type;
1306 }
1307
1308 static struct symt* dwarf2_parse_unspecified_type(dwarf2_parse_context_t* ctx,
1309 dwarf2_debug_info_t* di)
1310 {
1311 struct attribute name;
1312 struct attribute size;
1313 struct symt_basic *basic;
1314
1315 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1316
1317 if (di->symt) return di->symt;
1318
1319 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1320 name.u.string = "void";
1321 size.u.uvalue = sizeof(void *);
1322
1323 basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue);
1324 di->symt = &basic->symt;
1325
1326 if (!ctx->symt_cache[sc_void])
1327 ctx->symt_cache[sc_void] = di->symt;
1328
1329 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1330 return di->symt;
1331 }
1332
1333 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1334 dwarf2_debug_info_t* di)
1335 {
1336 struct symt* ref_type = NULL;
1337
1338 if (di->symt) return di->symt;
1339
1340 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1341
1342 ref_type = dwarf2_lookup_type(ctx, di);
1343 /* FIXME: for now, we hard-wire C++ references to pointers */
1344 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
1345
1346 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1347
1348 return di->symt;
1349 }
1350
1351 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1352 dwarf2_debug_info_t* di,
1353 struct symt_udt* parent)
1354 {
1355 struct symt* elt_type;
1356 struct attribute name;
1357 struct attribute bit_size;
1358 struct attribute bit_offset;
1359 struct location loc;
1360
1361 assert(parent);
1362
1363 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1364
1365 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1366 elt_type = dwarf2_lookup_type(ctx, di);
1367 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1368 {
1369 if (loc.kind != loc_absolute)
1370 {
1371 FIXME("Found register, while not expecting it\n");
1372 loc.offset = 0;
1373 }
1374 else
1375 TRACE("found member_location at %s -> %lu\n",
1376 dwarf2_debug_ctx(ctx), loc.offset);
1377 }
1378 else
1379 loc.offset = 0;
1380 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1381 bit_size.u.uvalue = 0;
1382 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1383 {
1384 /* FIXME: we should only do this when implementation is LSB (which is
1385 * the case on i386 processors)
1386 */
1387 struct attribute nbytes;
1388 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1389 {
1390 DWORD64 size;
1391 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1392 (unsigned long)size : 0;
1393 }
1394 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1395 }
1396 else bit_offset.u.uvalue = 0;
1397 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1398 (loc.offset << 3) + bit_offset.u.uvalue,
1399 bit_size.u.uvalue);
1400
1401 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1402 }
1403
1404 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1405 dwarf2_debug_info_t* di);
1406
1407 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1408 dwarf2_debug_info_t* di,
1409 enum UdtKind udt)
1410 {
1411 struct attribute name;
1412 struct attribute size;
1413 struct vector* children;
1414 dwarf2_debug_info_t*child;
1415 unsigned int i;
1416
1417 if (di->symt) return di->symt;
1418
1419 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1420
1421 /* quirk... FIXME provide real support for anonymous UDTs */
1422 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1423 name.u.string = "zz_anon_zz";
1424 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1425
1426 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string),
1427 size.u.uvalue, udt)->symt;
1428
1429 children = dwarf2_get_di_children(ctx, di);
1430 if (children) for (i = 0; i < vector_length(children); i++)
1431 {
1432 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1433
1434 switch (child->abbrev->tag)
1435 {
1436 case DW_TAG_array_type:
1437 dwarf2_parse_array_type(ctx, di);
1438 break;
1439 case DW_TAG_member:
1440 /* FIXME: should I follow the sibling stuff ?? */
1441 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1442 break;
1443 case DW_TAG_enumeration_type:
1444 dwarf2_parse_enumeration_type(ctx, child);
1445 break;
1446 case DW_TAG_subprogram:
1447 dwarf2_parse_subprogram(ctx, child);
1448 break;
1449 case DW_TAG_const_type:
1450 dwarf2_parse_const_type(ctx, child);
1451 break;
1452 case DW_TAG_structure_type:
1453 case DW_TAG_class_type:
1454 case DW_TAG_union_type:
1455 case DW_TAG_typedef:
1456 /* FIXME: we need to handle nested udt definitions */
1457 case DW_TAG_inheritance:
1458 case DW_TAG_template_type_param:
1459 case DW_TAG_template_value_param:
1460 case DW_TAG_variable:
1461 case DW_TAG_imported_declaration:
1462 case DW_TAG_ptr_to_member_type:
1463 case DW_TAG_GNU_template_parameter_pack:
1464 case DW_TAG_GNU_formal_parameter_pack:
1465 /* FIXME: some C++ related stuff */
1466 break;
1467 default:
1468 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1469 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1470 break;
1471 }
1472 }
1473
1474 return di->symt;
1475 }
1476
1477 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1478 dwarf2_debug_info_t* di,
1479 struct symt_enum* parent)
1480 {
1481 struct attribute name;
1482 struct attribute value;
1483
1484 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1485
1486 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1487 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1488 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1489
1490 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1491 }
1492
1493 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1494 dwarf2_debug_info_t* di)
1495 {
1496 struct attribute name;
1497 struct attribute size;
1498 struct symt_basic* basetype;
1499 struct vector* children;
1500 dwarf2_debug_info_t*child;
1501 unsigned int i;
1502
1503 if (di->symt) return di->symt;
1504
1505 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1506
1507 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1508 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1509
1510 switch (size.u.uvalue) /* FIXME: that's wrong */
1511 {
1512 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1513 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1514 default:
1515 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1516 }
1517
1518 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1519
1520 children = dwarf2_get_di_children(ctx, di);
1521 /* FIXME: should we use the sibling stuff ?? */
1522 if (children) for (i = 0; i < vector_length(children); i++)
1523 {
1524 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1525
1526 switch (child->abbrev->tag)
1527 {
1528 case DW_TAG_enumerator:
1529 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1530 break;
1531 default:
1532 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1533 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1534 }
1535 }
1536 return di->symt;
1537 }
1538
1539 /* structure used to pass information around when parsing a subprogram */
1540 typedef struct dwarf2_subprogram_s
1541 {
1542 dwarf2_parse_context_t* ctx;
1543 struct symt_function* func;
1544 BOOL non_computed_variable;
1545 struct location frame;
1546 } dwarf2_subprogram_t;
1547
1548 /******************************************************************
1549 * dwarf2_parse_variable
1550 *
1551 * Parses any variable (parameter, local/global variable)
1552 */
1553 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1554 struct symt_block* block,
1555 dwarf2_debug_info_t* di)
1556 {
1557 struct symt* param_type;
1558 struct attribute name, value;
1559 struct location loc;
1560 BOOL is_pmt;
1561
1562 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1563
1564 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1565 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1566
1567 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1568 /* cannot do much without the name, the functions below won't like it. */
1569 return;
1570 }
1571 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1572 &loc, &subpgm->frame))
1573 {
1574 struct attribute ext;
1575
1576 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1577 name.u.string, loc.kind, loc.offset, loc.reg,
1578 dwarf2_debug_ctx(subpgm->ctx));
1579
1580 switch (loc.kind)
1581 {
1582 case loc_error:
1583 break;
1584 case loc_absolute:
1585 /* it's a global variable */
1586 /* FIXME: we don't handle its scope yet */
1587 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1588 ext.u.uvalue = 0;
1589 loc.offset += subpgm->ctx->load_offset;
1590 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland,
1591 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue,
1592 loc, 0, param_type);
1593 break;
1594 default:
1595 subpgm->non_computed_variable = TRUE;
1596 /* fall through */
1597 case loc_register:
1598 case loc_regrel:
1599 /* either a pmt/variable relative to frame pointer or
1600 * pmt/variable in a register
1601 */
1602 assert(subpgm->func);
1603 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1604 is_pmt ? DataIsParam : DataIsLocal,
1605 &loc, block, param_type, name.u.string);
1606 break;
1607 }
1608 }
1609 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1610 {
1611 VARIANT v;
1612 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1613 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1614 switch (value.form)
1615 {
1616 case DW_FORM_data1:
1617 case DW_FORM_data2:
1618 case DW_FORM_data4:
1619 case DW_FORM_udata:
1620 case DW_FORM_addr:
1621 v.n1.n2.vt = VT_UI4;
1622 v.n1.n2.n3.lVal = value.u.uvalue;
1623 break;
1624
1625 case DW_FORM_data8:
1626 v.n1.n2.vt = VT_UI8;
1627 v.n1.n2.n3.llVal = value.u.lluvalue;
1628 break;
1629
1630 case DW_FORM_sdata:
1631 v.n1.n2.vt = VT_I4;
1632 v.n1.n2.n3.lVal = value.u.svalue;
1633 break;
1634
1635 case DW_FORM_strp:
1636 case DW_FORM_string:
1637 /* FIXME: native doesn't report const strings from here !!
1638 * however, the value of the string is in the code somewhere
1639 */
1640 v.n1.n2.vt = VT_I1 | VT_BYREF;
1641 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1642 break;
1643
1644 case DW_FORM_block:
1645 case DW_FORM_block1:
1646 case DW_FORM_block2:
1647 case DW_FORM_block4:
1648 v.n1.n2.vt = VT_I4;
1649 switch (value.u.block.size)
1650 {
1651 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1652 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1653 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1654 default:
1655 v.n1.n2.vt = VT_I1 | VT_BYREF;
1656 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1657 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1658 }
1659 break;
1660
1661 default:
1662 FIXME("Unsupported form for const value %s (%lx)\n",
1663 name.u.string, value.form);
1664 v.n1.n2.vt = VT_EMPTY;
1665 }
1666 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland,
1667 name.u.string, param_type, &v)->symt;
1668 }
1669 else
1670 {
1671 /* variable has been optimized away... report anyway */
1672 loc.kind = loc_error;
1673 loc.reg = loc_err_no_location;
1674 if (subpgm->func)
1675 {
1676 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1677 is_pmt ? DataIsParam : DataIsLocal,
1678 &loc, block, param_type, name.u.string);
1679 }
1680 else
1681 {
1682 WARN("dropping global variable %s which has been optimized away\n", name.u.string);
1683 }
1684 }
1685 if (is_pmt && subpgm->func && subpgm->func->type)
1686 symt_add_function_signature_parameter(subpgm->ctx->module,
1687 (struct symt_function_signature*)subpgm->func->type,
1688 param_type);
1689
1690 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n");
1691 }
1692
1693 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1694 const dwarf2_debug_info_t* di)
1695 {
1696 struct attribute name;
1697 struct attribute low_pc;
1698 struct location loc;
1699
1700 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1701
1702 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1703 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1704 name.u.string = NULL;
1705
1706 loc.kind = loc_absolute;
1707 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1708 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1709 &loc, name.u.string);
1710 }
1711
1712 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1713 struct symt_block* parent_block,
1714 dwarf2_debug_info_t* di);
1715
1716 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1717 dwarf2_debug_info_t* di);
1718
1719 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1720 struct symt_block* parent_block,
1721 dwarf2_debug_info_t* di)
1722 {
1723 struct symt_block* block;
1724 unsigned long low_pc, high_pc;
1725 struct vector* children;
1726 dwarf2_debug_info_t*child;
1727 unsigned int i;
1728
1729 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1730
1731 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1732 {
1733 FIXME("cannot read range\n");
1734 return;
1735 }
1736
1737 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1738 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1739 high_pc - low_pc);
1740
1741 children = dwarf2_get_di_children(subpgm->ctx, di);
1742 if (children) for (i = 0; i < vector_length(children); i++)
1743 {
1744 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1745
1746 switch (child->abbrev->tag)
1747 {
1748 case DW_TAG_formal_parameter:
1749 case DW_TAG_variable:
1750 dwarf2_parse_variable(subpgm, block, child);
1751 break;
1752 case DW_TAG_lexical_block:
1753 dwarf2_parse_subprogram_block(subpgm, block, child);
1754 break;
1755 case DW_TAG_inlined_subroutine:
1756 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1757 break;
1758 case DW_TAG_label:
1759 dwarf2_parse_subprogram_label(subpgm, child);
1760 break;
1761 case DW_TAG_GNU_call_site:
1762 /* this isn't properly supported by dbghelp interface. skip it for now */
1763 break;
1764 default:
1765 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1766 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1767 dwarf2_debug_di(di));
1768 }
1769 }
1770 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1771 }
1772
1773 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1774 struct symt_block* parent_block,
1775 dwarf2_debug_info_t* di)
1776 {
1777 struct symt_block* block;
1778 unsigned long low_pc, high_pc;
1779 struct vector* children;
1780 dwarf2_debug_info_t*child;
1781 unsigned int i;
1782
1783 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1784
1785 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1786 {
1787 FIXME("no range\n");
1788 return;
1789 }
1790
1791 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1792 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1793 high_pc - low_pc);
1794
1795 children = dwarf2_get_di_children(subpgm->ctx, di);
1796 if (children) for (i = 0; i < vector_length(children); i++)
1797 {
1798 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1799
1800 switch (child->abbrev->tag)
1801 {
1802 case DW_TAG_inlined_subroutine:
1803 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1804 break;
1805 case DW_TAG_variable:
1806 dwarf2_parse_variable(subpgm, block, child);
1807 break;
1808 case DW_TAG_pointer_type:
1809 dwarf2_parse_pointer_type(subpgm->ctx, di);
1810 break;
1811 case DW_TAG_subroutine_type:
1812 dwarf2_parse_subroutine_type(subpgm->ctx, di);
1813 break;
1814 case DW_TAG_const_type:
1815 dwarf2_parse_const_type(subpgm->ctx, di);
1816 break;
1817 case DW_TAG_lexical_block:
1818 dwarf2_parse_subprogram_block(subpgm, block, child);
1819 break;
1820 case DW_TAG_subprogram:
1821 /* FIXME: likely a declaration (to be checked)
1822 * skip it for now
1823 */
1824 break;
1825 case DW_TAG_formal_parameter:
1826 /* FIXME: likely elements for exception handling (GCC flavor)
1827 * Skip it for now
1828 */
1829 break;
1830 case DW_TAG_imported_module:
1831 /* C++ stuff to be silenced (for now) */
1832 break;
1833 case DW_TAG_GNU_call_site:
1834 /* this isn't properly supported by dbghelp interface. skip it for now */
1835 break;
1836 case DW_TAG_label:
1837 dwarf2_parse_subprogram_label(subpgm, child);
1838 break;
1839 case DW_TAG_class_type:
1840 case DW_TAG_structure_type:
1841 case DW_TAG_union_type:
1842 case DW_TAG_enumeration_type:
1843 case DW_TAG_typedef:
1844 /* the type referred to will be loaded when we need it, so skip it */
1845 break;
1846 default:
1847 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1848 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1849 }
1850 }
1851
1852 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1853 }
1854
1855 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1856 dwarf2_debug_info_t* di)
1857 {
1858 struct attribute name;
1859 unsigned long low_pc, high_pc;
1860 struct attribute is_decl;
1861 struct attribute inline_flags;
1862 struct symt* ret_type;
1863 struct symt_function_signature* sig_type;
1864 dwarf2_subprogram_t subpgm;
1865 struct vector* children;
1866 dwarf2_debug_info_t* child;
1867 unsigned int i;
1868
1869 if (di->symt) return di->symt;
1870
1871 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1872
1873 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1874 {
1875 WARN("No name for function... dropping function\n");
1876 return NULL;
1877 }
1878 /* if it's an abstract representation of an inline function, there should be
1879 * a concrete object that we'll handle
1880 */
1881 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) &&
1882 inline_flags.u.uvalue != DW_INL_not_inlined)
1883 {
1884 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1885 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1886 return NULL;
1887 }
1888
1889 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) &&
1890 is_decl.u.uvalue && is_decl.gotten_from == attr_direct)
1891 {
1892 /* it's a real declaration, skip it */
1893 return NULL;
1894 }
1895 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
1896 {
1897 WARN("cannot get range for %s\n", name.u.string);
1898 return NULL;
1899 }
1900 /* As functions (defined as inline assembly) get debug info with dwarf
1901 * (not the case for stabs), we just drop Wine's thunks here...
1902 * Actual thunks will be created in elf_module from the symbol table
1903 */
1904 #ifndef DBGHELP_STATIC_LIB
1905 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
1906 return NULL;
1907 #endif
1908 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1909 {
1910 ret_type = ctx->symt_cache[sc_void];
1911 assert(ret_type);
1912 }
1913 /* FIXME: assuming C source code */
1914 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1915 subpgm.func = symt_new_function(ctx->module, ctx->compiland,
1916 dwarf2_get_cpp_name(ctx, di, name.u.string),
1917 ctx->load_offset + low_pc, high_pc - low_pc,
1918 &sig_type->symt);
1919 di->symt = &subpgm.func->symt;
1920 subpgm.ctx = ctx;
1921 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1922 &subpgm.frame, NULL))
1923 {
1924 /* on stack !! */
1925 subpgm.frame.kind = loc_regrel;
1926 subpgm.frame.reg = dbghelp_current_cpu->frame_regno;
1927 subpgm.frame.offset = 0;
1928 }
1929 subpgm.non_computed_variable = FALSE;
1930
1931 children = dwarf2_get_di_children(ctx, di);
1932 if (children) for (i = 0; i < vector_length(children); i++)
1933 {
1934 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1935
1936 switch (child->abbrev->tag)
1937 {
1938 case DW_TAG_variable:
1939 case DW_TAG_formal_parameter:
1940 dwarf2_parse_variable(&subpgm, NULL, child);
1941 break;
1942 case DW_TAG_lexical_block:
1943 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1944 break;
1945 case DW_TAG_inlined_subroutine:
1946 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1947 break;
1948 case DW_TAG_pointer_type:
1949 dwarf2_parse_pointer_type(subpgm.ctx, di);
1950 break;
1951 case DW_TAG_const_type:
1952 dwarf2_parse_const_type(subpgm.ctx, di);
1953 break;
1954 case DW_TAG_subprogram:
1955 /* FIXME: likely a declaration (to be checked)
1956 * skip it for now
1957 */
1958 break;
1959 case DW_TAG_label:
1960 dwarf2_parse_subprogram_label(&subpgm, child);
1961 break;
1962 case DW_TAG_class_type:
1963 case DW_TAG_structure_type:
1964 case DW_TAG_union_type:
1965 case DW_TAG_enumeration_type:
1966 case DW_TAG_typedef:
1967 /* the type referred to will be loaded when we need it, so skip it */
1968 break;
1969 case DW_TAG_unspecified_parameters:
1970 case DW_TAG_template_type_param:
1971 case DW_TAG_template_value_param:
1972 case DW_TAG_GNU_call_site:
1973 case DW_TAG_GNU_template_parameter_pack:
1974 case DW_TAG_GNU_formal_parameter_pack:
1975 /* FIXME: no support in dbghelp's internals so far */
1976 break;
1977 default:
1978 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1979 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1980 }
1981 }
1982
1983 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1984 {
1985 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1986 &subpgm.frame, NULL);
1987 }
1988 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1989
1990 return di->symt;
1991 }
1992
1993 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1994 dwarf2_debug_info_t* di)
1995 {
1996 struct symt* ret_type;
1997 struct symt_function_signature* sig_type;
1998 struct vector* children;
1999 dwarf2_debug_info_t* child;
2000 unsigned int i;
2001
2002 if (di->symt) return di->symt;
2003
2004 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2005
2006 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
2007 {
2008 ret_type = ctx->symt_cache[sc_void];
2009 assert(ret_type);
2010 }
2011
2012 /* FIXME: assuming C source code */
2013 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
2014
2015 children = dwarf2_get_di_children(ctx, di);
2016 if (children) for (i = 0; i < vector_length(children); i++)
2017 {
2018 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2019
2020 switch (child->abbrev->tag)
2021 {
2022 case DW_TAG_formal_parameter:
2023 symt_add_function_signature_parameter(ctx->module, sig_type,
2024 dwarf2_lookup_type(ctx, child));
2025 break;
2026 case DW_TAG_unspecified_parameters:
2027 WARN("Unsupported unspecified parameters\n");
2028 break;
2029 }
2030 }
2031
2032 return di->symt = &sig_type->symt;
2033 }
2034
2035 static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx,
2036 dwarf2_debug_info_t* di)
2037 {
2038 struct vector* children;
2039 dwarf2_debug_info_t* child;
2040 unsigned int i;
2041
2042 if (di->symt) return;
2043
2044 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2045
2046 di->symt = ctx->symt_cache[sc_void];
2047
2048 children = dwarf2_get_di_children(ctx, di);
2049 if (children) for (i = 0; i < vector_length(children); i++)
2050 {
2051 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2052 dwarf2_load_one_entry(ctx, child);
2053 }
2054 }
2055
2056 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
2057 dwarf2_debug_info_t* di)
2058 {
2059 switch (di->abbrev->tag)
2060 {
2061 case DW_TAG_typedef:
2062 dwarf2_parse_typedef(ctx, di);
2063 break;
2064 case DW_TAG_base_type:
2065 dwarf2_parse_base_type(ctx, di);
2066 break;
2067 case DW_TAG_pointer_type:
2068 dwarf2_parse_pointer_type(ctx, di);
2069 break;
2070 case DW_TAG_class_type:
2071 dwarf2_parse_udt_type(ctx, di, UdtClass);
2072 break;
2073 case DW_TAG_structure_type:
2074 dwarf2_parse_udt_type(ctx, di, UdtStruct);
2075 break;
2076 case DW_TAG_union_type:
2077 dwarf2_parse_udt_type(ctx, di, UdtUnion);
2078 break;
2079 case DW_TAG_array_type:
2080 dwarf2_parse_array_type(ctx, di);
2081 break;
2082 case DW_TAG_const_type:
2083 dwarf2_parse_const_type(ctx, di);
2084 break;
2085 case DW_TAG_volatile_type:
2086 dwarf2_parse_volatile_type(ctx, di);
2087 break;
2088 case DW_TAG_unspecified_type:
2089 dwarf2_parse_unspecified_type(ctx, di);
2090 break;
2091 case DW_TAG_reference_type:
2092 dwarf2_parse_reference_type(ctx, di);
2093 break;
2094 case DW_TAG_enumeration_type:
2095 dwarf2_parse_enumeration_type(ctx, di);
2096 break;
2097 case DW_TAG_subprogram:
2098 dwarf2_parse_subprogram(ctx, di);
2099 break;
2100 case DW_TAG_subroutine_type:
2101 dwarf2_parse_subroutine_type(ctx, di);
2102 break;
2103 case DW_TAG_variable:
2104 {
2105 dwarf2_subprogram_t subpgm;
2106
2107 subpgm.ctx = ctx;
2108 subpgm.func = NULL;
2109 subpgm.frame.kind = loc_absolute;
2110 subpgm.frame.offset = 0;
2111 subpgm.frame.reg = Wine_DW_no_register;
2112 dwarf2_parse_variable(&subpgm, NULL, di);
2113 }
2114 break;
2115 case DW_TAG_namespace:
2116 dwarf2_parse_namespace(ctx, di);
2117 break;
2118 /* silence a couple of C++ defines */
2119 case DW_TAG_imported_module:
2120 case DW_TAG_imported_declaration:
2121 case DW_TAG_ptr_to_member_type:
2122 break;
2123 default:
2124 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
2125 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
2126 }
2127 }
2128
2129 static void dwarf2_set_line_number(struct module* module, unsigned long address,
2130 const struct vector* v, unsigned file, unsigned line)
2131 {
2132 struct symt_function* func;
2133 struct symt_ht* symt;
2134 unsigned* psrc;
2135
2136 if (!file || !(psrc = vector_at(v, file - 1))) return;
2137
2138 TRACE("%s %lx %s %u\n",
2139 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
2140 if (!(symt = symt_find_nearest(module, address)) ||
2141 symt->symt.tag != SymTagFunction) return;
2142 func = (struct symt_function*)symt;
2143 symt_add_func_line(module, func, *psrc, line, address - func->address);
2144 }
2145
2146 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
2147 dwarf2_parse_context_t* ctx,
2148 const char* compile_dir,
2149 unsigned long offset)
2150 {
2151 dwarf2_traverse_context_t traverse;
2152 unsigned long length;
2153 unsigned insn_size, default_stmt;
2154 unsigned line_range, opcode_base;
2155 int line_base;
2156 const unsigned char* opcode_len;
2157 struct vector dirs;
2158 struct vector files;
2159 const char** p;
2160
2161 /* section with line numbers stripped */
2162 if (sections[section_line].address == IMAGE_NO_MAP)
2163 return FALSE;
2164
2165 if (offset + 4 > sections[section_line].size)
2166 {
2167 WARN("out of bounds offset\n");
2168 return FALSE;
2169 }
2170 traverse.data = sections[section_line].address + offset;
2171 traverse.end_data = traverse.data + 4;
2172 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2173
2174 length = dwarf2_parse_u4(&traverse);
2175 traverse.end_data = sections[section_line].address + offset + length;
2176
2177 if (offset + 4 + length > sections[section_line].size)
2178 {
2179 WARN("out of bounds header\n");
2180 return FALSE;
2181 }
2182 dwarf2_parse_u2(&traverse); /* version */
2183 dwarf2_parse_u4(&traverse); /* header_len */
2184 insn_size = dwarf2_parse_byte(&traverse);
2185 default_stmt = dwarf2_parse_byte(&traverse);
2186 line_base = (signed char)dwarf2_parse_byte(&traverse);
2187 line_range = dwarf2_parse_byte(&traverse);
2188 opcode_base = dwarf2_parse_byte(&traverse);
2189
2190 opcode_len = traverse.data;
2191 traverse.data += opcode_base - 1;
2192
2193 vector_init(&dirs, sizeof(const char*), 4);
2194 p = vector_add(&dirs, &ctx->pool);
2195 *p = compile_dir ? compile_dir : ".";
2196 while (*traverse.data)
2197 {
2198 const char* rel = (const char*)traverse.data;
2199 unsigned rellen = strlen(rel);
2200 TRACE("Got include %s\n", rel);
2201 traverse.data += rellen + 1;
2202 p = vector_add(&dirs, &ctx->pool);
2203
2204 if (*rel == '/' || !compile_dir)
2205 *p = rel;
2206 else
2207 {
2208 /* include directory relative to compile directory */
2209 unsigned baselen = strlen(compile_dir);
2210 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
2211 strcpy(tmp, compile_dir);
2212 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2213 strcpy(&tmp[baselen], rel);
2214 *p = tmp;
2215 }
2216
2217 }
2218 traverse.data++;
2219
2220 vector_init(&files, sizeof(unsigned), 16);
2221 while (*traverse.data)
2222 {
2223 unsigned int dir_index, mod_time;
2224 const char* name;
2225 const char* dir;
2226 unsigned* psrc;
2227
2228 name = (const char*)traverse.data;
2229 traverse.data += strlen(name) + 1;
2230 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2231 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2232 length = dwarf2_leb128_as_unsigned(&traverse);
2233 dir = *(const char**)vector_at(&dirs, dir_index);
2234 TRACE("Got file %s/%s (%u,%lu)\n", dir, name, mod_time, length);
2235 psrc = vector_add(&files, &ctx->pool);
2236 *psrc = source_new(ctx->module, dir, name);
2237 }
2238 traverse.data++;
2239
2240 while (traverse.data < traverse.end_data)
2241 {
2242 unsigned long address = 0;
2243 unsigned file = 1;
2244 unsigned line = 1;
2245 unsigned is_stmt = default_stmt;
2246 BOOL end_sequence = FALSE;
2247 unsigned opcode, extopcode, i;
2248
2249 while (!end_sequence)
2250 {
2251 opcode = dwarf2_parse_byte(&traverse);
2252 TRACE("Got opcode %x\n", opcode);
2253
2254 if (opcode >= opcode_base)
2255 {
2256 unsigned delta = opcode - opcode_base;
2257
2258 address += (delta / line_range) * insn_size;
2259 line += line_base + (delta % line_range);
2260 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2261 }
2262 else
2263 {
2264 switch (opcode)
2265 {
2266 case DW_LNS_copy:
2267 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2268 break;
2269 case DW_LNS_advance_pc:
2270 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2271 break;
2272 case DW_LNS_advance_line:
2273 line += dwarf2_leb128_as_signed(&traverse);
2274 break;
2275 case DW_LNS_set_file:
2276 file = dwarf2_leb128_as_unsigned(&traverse);
2277 break;
2278 case DW_LNS_set_column:
2279 dwarf2_leb128_as_unsigned(&traverse);
2280 break;
2281 case DW_LNS_negate_stmt:
2282 is_stmt = !is_stmt;
2283 break;
2284 case DW_LNS_set_basic_block:
2285 break;
2286 case DW_LNS_const_add_pc:
2287 address += ((255 - opcode_base) / line_range) * insn_size;
2288 break;
2289 case DW_LNS_fixed_advance_pc:
2290 address += dwarf2_parse_u2(&traverse);
2291 break;
2292 case DW_LNS_extended_op:
2293 dwarf2_leb128_as_unsigned(&traverse);
2294 extopcode = dwarf2_parse_byte(&traverse);
2295 switch (extopcode)
2296 {
2297 case DW_LNE_end_sequence:
2298 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2299 end_sequence = TRUE;
2300 break;
2301 case DW_LNE_set_address:
2302 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2303 break;
2304 case DW_LNE_define_file:
2305 FIXME("not handled define file %s\n", traverse.data);
2306 traverse.data += strlen((const char *)traverse.data) + 1;
2307 dwarf2_leb128_as_unsigned(&traverse);
2308 dwarf2_leb128_as_unsigned(&traverse);
2309 dwarf2_leb128_as_unsigned(&traverse);
2310 break;
2311 case DW_LNE_set_discriminator:
2312 {
2313 unsigned descr;
2314
2315 descr = dwarf2_leb128_as_unsigned(&traverse);
2316 WARN("not handled discriminator %x\n", descr);
2317 }
2318 break;
2319 default:
2320 FIXME("Unsupported extended opcode %x\n", extopcode);
2321 break;
2322 }
2323 break;
2324 default:
2325 WARN("Unsupported opcode %x\n", opcode);
2326 for (i = 0; i < opcode_len[opcode]; i++)
2327 dwarf2_leb128_as_unsigned(&traverse);
2328 break;
2329 }
2330 }
2331 }
2332 }
2333 return TRUE;
2334 }
2335
2336 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2337 struct module* module,
2338 const struct elf_thunk_area* thunks,
2339 dwarf2_traverse_context_t* mod_ctx,
2340 unsigned long load_offset)
2341 {
2342 dwarf2_parse_context_t ctx;
2343 dwarf2_traverse_context_t abbrev_ctx;
2344 dwarf2_debug_info_t* di;
2345 dwarf2_traverse_context_t cu_ctx;
2346 const unsigned char* comp_unit_start = mod_ctx->data;
2347 unsigned long cu_length;
2348 unsigned short cu_version;
2349 unsigned long cu_abbrev_offset;
2350 BOOL ret = FALSE;
2351
2352 cu_length = dwarf2_parse_u4(mod_ctx);
2353 cu_ctx.data = mod_ctx->data;
2354 cu_ctx.end_data = mod_ctx->data + cu_length;
2355 mod_ctx->data += cu_length;
2356 cu_version = dwarf2_parse_u2(&cu_ctx);
2357 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2358 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2359
2360 TRACE("Compilation Unit Header found at 0x%x:\n",
2361 (int)(comp_unit_start - sections[section_debug].address));
2362 TRACE("- length: %lu\n", cu_length);
2363 TRACE("- version: %u\n", cu_version);
2364 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2365 TRACE("- word_size: %u\n", cu_ctx.word_size);
2366
2367 if (cu_version != 2)
2368 {
2369 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2370 cu_version);
2371 return FALSE;
2372 }
2373
2374 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2375 mod_ctx->word_size = cu_ctx.word_size;
2376
2377 pool_init(&ctx.pool, 65536);
2378 ctx.sections = sections;
2379 ctx.section = section_debug;
2380 ctx.module = module;
2381 ctx.thunks = thunks;
2382 ctx.load_offset = load_offset;
2383 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2384 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2385 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2386 ctx.cpp_name = NULL;
2387
2388 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2389 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2390 abbrev_ctx.word_size = cu_ctx.word_size;
2391 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2392
2393 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2394 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di);
2395
2396 if (di->abbrev->tag == DW_TAG_compile_unit)
2397 {
2398 struct attribute name;
2399 struct vector* children;
2400 dwarf2_debug_info_t* child = NULL;
2401 unsigned int i;
2402 struct attribute stmt_list, low_pc;
2403 struct attribute comp_dir;
2404
2405 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2406 name.u.string = NULL;
2407
2408 /* get working directory of current compilation unit */
2409 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2410 comp_dir.u.string = NULL;
2411
2412 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2413 low_pc.u.uvalue = 0;
2414 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue,
2415 source_new(module, comp_dir.u.string, name.u.string));
2416 di->symt = &ctx.compiland->symt;
2417 children = dwarf2_get_di_children(&ctx, di);
2418 if (children) for (i = 0; i < vector_length(children); i++)
2419 {
2420 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2421 dwarf2_load_one_entry(&ctx, child);
2422 }
2423 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2424 {
2425 #if defined(__REACTOS__) && defined(__clang__)
2426 unsigned long stmt_list_val = stmt_list.u.uvalue;
2427 if (stmt_list_val > module->module.BaseOfImage)
2428 {
2429 /* FIXME: Clang is recording this as an address, not an offset */
2430 stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva;
2431 }
2432 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val))
2433 #else
2434 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2435 #endif
2436 module->module.LineNumbers = TRUE;
2437 }
2438 ret = TRUE;
2439 }
2440 else FIXME("Should have a compilation unit here\n");
2441 pool_destroy(&ctx.pool);
2442 return ret;
2443 }
2444
2445 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2446 unsigned long ip, dwarf2_traverse_context_t* lctx)
2447 {
2448 DWORD_PTR beg, end;
2449 const BYTE* ptr = start;
2450 DWORD len;
2451
2452 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2453 {
2454 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2455 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2456 if (!beg && !end) break;
2457 len = dwarf2_get_u2(ptr); ptr += 2;
2458
2459 if (beg <= ip && ip < end)
2460 {
2461 lctx->data = ptr;
2462 lctx->end_data = ptr + len;
2463 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2464 return TRUE;
2465 }
2466 ptr += len;
2467 }
2468 WARN("Couldn't find ip in location list\n");
2469 return FALSE;
2470 }
2471
2472 static enum location_error loc_compute_frame(struct process* pcs,
2473 const struct module_format* modfmt,
2474 const struct symt_function* func,
2475 DWORD_PTR ip, struct location* frame)
2476 {
2477 struct symt** psym = NULL;
2478 struct location* pframe;
2479 dwarf2_traverse_context_t lctx;
2480 enum location_error err;
2481 unsigned int i;
2482
2483 for (i=0; i<vector_length(&func->vchildren); i++)
2484 {
2485 psym = vector_at(&func->vchildren, i);
2486 if ((*psym)->tag == SymTagCustom)
2487 {
2488 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2489
2490 /* First, recompute the frame information, if needed */
2491 switch (pframe->kind)
2492 {
2493 case loc_regrel:
2494 case loc_register:
2495 *frame = *pframe;
2496 break;
2497 case loc_dwarf2_location_list:
2498 WARN("Searching loclist for %s\n", func->hash_elt.name);
2499 if (!dwarf2_lookup_loclist(modfmt,
2500 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2501 ip, &lctx))
2502 return loc_err_out_of_scope;
2503 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2504 if (frame->kind >= loc_user)
2505 {
2506 WARN("Couldn't compute runtime frame location\n");
2507 return loc_err_too_complex;
2508 }
2509 break;
2510 default:
2511 WARN("Unsupported frame kind %d\n", pframe->kind);
2512 return loc_err_internal;
2513 }
2514 return 0;
2515 }
2516 }
2517 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2518 return loc_err_internal;
2519 }
2520
2521 enum reg_rule
2522 {
2523 RULE_UNSET, /* not set at all */
2524 RULE_UNDEFINED, /* undefined value */
2525 RULE_SAME, /* same value as previous frame */
2526 RULE_CFA_OFFSET, /* stored at cfa offset */
2527 RULE_OTHER_REG, /* stored in other register */
2528 RULE_EXPRESSION, /* address specified by expression */
2529 RULE_VAL_EXPRESSION /* value specified by expression */
2530 };
2531
2532 /* make it large enough for all CPUs */
2533 #define NB_FRAME_REGS 64
2534 #define MAX_SAVED_STATES 16
2535
2536 struct frame_state
2537 {
2538 ULONG_PTR cfa_offset;
2539 unsigned char cfa_reg;
2540 enum reg_rule cfa_rule;
2541 enum reg_rule rules[NB_FRAME_REGS];
2542 ULONG_PTR regs[NB_FRAME_REGS];
2543 };
2544
2545 struct frame_info
2546 {
2547 ULONG_PTR ip;
2548 ULONG_PTR code_align;
2549 LONG_PTR data_align;
2550 unsigned char retaddr_reg;
2551 unsigned char fde_encoding;
2552 unsigned char lsda_encoding;
2553 unsigned char signal_frame;
2554 unsigned char aug_z_format;
2555 unsigned char state_sp;
2556 struct frame_state state;
2557 struct frame_state state_stack[MAX_SAVED_STATES];
2558 };
2559
2560 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2561 {
2562 ULONG_PTR base;
2563
2564 if (encoding == DW_EH_PE_omit) return 0;
2565
2566 switch (encoding & 0xf0)
2567 {
2568 case DW_EH_PE_abs:
2569 base = 0;
2570 break;
2571 case DW_EH_PE_pcrel:
2572 base = (ULONG_PTR)ctx->data;
2573 break;
2574 default:
2575 FIXME("unsupported encoding %02x\n", encoding);
2576 return 0;
2577 }
2578
2579 switch (encoding & 0x0f)
2580 {
2581 case DW_EH_PE_native:
2582 return base + dwarf2_parse_addr(ctx);
2583 case DW_EH_PE_leb128:
2584 return base + dwarf2_leb128_as_unsigned(ctx);
2585 case DW_EH_PE_data2:
2586 return base + dwarf2_parse_u2(ctx);
2587 case DW_EH_PE_data4:
2588 return base + dwarf2_parse_u4(ctx);
2589 case DW_EH_PE_data8:
2590 return base + dwarf2_parse_u8(ctx);
2591 case DW_EH_PE_signed|DW_EH_PE_leb128:
2592 return base + dwarf2_leb128_as_signed(ctx);
2593 case DW_EH_PE_signed|DW_EH_PE_data2:
2594 return base + (signed short)dwarf2_parse_u2(ctx);
2595 case DW_EH_PE_signed|DW_EH_PE_data4:
2596 return base + (signed int)dwarf2_parse_u4(ctx);
2597 case DW_EH_PE_signed|DW_EH_PE_data8:
2598 return base + (LONG64)dwarf2_parse_u8(ctx);
2599 default:
2600 FIXME("unsupported encoding %02x\n", encoding);
2601 return 0;
2602 }
2603 }
2604
2605 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2606 {
2607 unsigned char version;
2608 const char* augmentation;
2609 const unsigned char* end;
2610 ULONG_PTR len;
2611
2612 memset(info, 0, sizeof(*info));
2613 info->lsda_encoding = DW_EH_PE_omit;
2614 info->aug_z_format = 0;
2615
2616 /* parse the CIE first */
2617 version = dwarf2_parse_byte(ctx);
2618 if (version != 1 && version != 3)
2619 {
2620 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2621 return FALSE;
2622 }
2623 augmentation = (const char*)ctx->data;
2624 ctx->data += strlen(augmentation) + 1;
2625
2626 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2627 info->data_align = dwarf2_leb128_as_signed(ctx);
2628 if (version == 1)
2629 info->retaddr_reg = dwarf2_parse_byte(ctx);
2630 else
2631 info->retaddr_reg = dwarf2_leb128_as_unsigned(ctx);
2632 info->state.cfa_rule = RULE_CFA_OFFSET;
2633
2634 end = NULL;
2635 TRACE("\tparsing augmentation %s\n", augmentation);
2636 if (*augmentation) do
2637 {
2638 switch (*augmentation)
2639 {
2640 case 'z':
2641 len = dwarf2_leb128_as_unsigned(ctx);
2642 end = ctx->data + len;
2643 info->aug_z_format = 1;
2644 continue;
2645 case 'L':
2646 info->lsda_encoding = dwarf2_parse_byte(ctx);
2647 continue;
2648 case 'P':
2649 {
2650 unsigned char encoding = dwarf2_parse_byte(ctx);
2651 /* throw away the indirect bit, as we don't care for the result */
2652 encoding &= ~DW_EH_PE_indirect;
2653 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2654 continue;
2655 }
2656 case 'R':
2657 info->fde_encoding = dwarf2_parse_byte(ctx);
2658 continue;
2659 case 'S':
2660 info->signal_frame = 1;
2661 continue;
2662 }
2663 FIXME("unknown augmentation '%c'\n", *augmentation);
2664 if (!end) return FALSE;
2665 break;
2666 } while (*++augmentation);
2667 if (end) ctx->data = end;
2668 return TRUE;
2669 }
2670
2671 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2672 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2673 struct frame_info* info, BOOL in_eh_frame)
2674 {
2675 const unsigned char* ptr_blk;
2676 const unsigned char* cie_ptr;
2677 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2678 unsigned len, id;
2679 unsigned long start, range;
2680 unsigned cie_id;
2681 const BYTE* start_data = fde_ctx->data;
2682
2683 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2684 /* skip 0-padding at beginning of section (alignment) */
2685 while (fde_ctx->data + 2 * 4 < fde_ctx->end_data)
2686 {
2687 if (dwarf2_parse_u4(fde_ctx))
2688 {
2689 fde_ctx->data -= 4;
2690 break;
2691 }
2692 }
2693 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2694 {
2695 /* find the FDE for address addr (skip CIE) */
2696 len = dwarf2_parse_u4(fde_ctx);
2697 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2698 ptr_blk = fde_ctx->data + len;
2699 id = dwarf2_parse_u4(fde_ctx);
2700 if (id == cie_id)
2701 {
2702 last_cie_ptr = fde_ctx->data - 8;
2703 /* we need some bits out of the CIE in order to parse all contents */
2704 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2705 cie_ctx->data = fde_ctx->data;
2706 cie_ctx->end_data = ptr_blk;
2707 cie_ctx->word_size = fde_ctx->word_size;
2708 continue;
2709 }
2710 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2711 if (cie_ptr != last_cie_ptr)
2712 {
2713 last_cie_ptr = cie_ptr;
2714 cie_ctx->data = cie_ptr;
2715 cie_ctx->word_size = fde_ctx->word_size;
2716 cie_ctx->end_data = cie_ptr + 4;
2717 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2718 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2719 {
2720 FIXME("wrong CIE pointer at %x from FDE %x\n",
2721 (unsigned)(cie_ptr - start_data),
2722 (unsigned)(fde_ctx->data - start_data));
2723 return FALSE;
2724 }
2725 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2726 }
2727 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2728 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2729
2730 if (addr >= start && addr < start + range)
2731 {
2732 /* reset the FDE context */
2733 fde_ctx->end_data = ptr_blk;
2734
2735 info->ip = start;
2736 return TRUE;
2737 }
2738 }
2739 return FALSE;
2740 }
2741
2742 static int valid_reg(ULONG_PTR reg)
2743 {
2744 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2745 return (reg < NB_FRAME_REGS);
2746 }
2747
2748 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2749 ULONG_PTR last_ip, struct frame_info *info)
2750 {
2751 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame)
2752 {
2753 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2754
2755 if (op & 0xc0)
2756 {
2757 switch (op & 0xc0)
2758 {
2759 case DW_CFA_advance_loc:
2760 {
2761 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2762 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2763 info->ip += offset;
2764 break;
2765 }
2766 case DW_CFA_offset:
2767 {
2768 ULONG_PTR reg = op & 0x3f;
2769 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2770 if (!valid_reg(reg)) break;
2771 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2772 info->ip,
2773 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2774 offset);
2775 info->state.regs[reg] = offset;
2776 info->state.rules[reg] = RULE_CFA_OFFSET;
2777 break;
2778 }
2779 case DW_CFA_restore:
2780 {
2781 ULONG_PTR reg = op & 0x3f;
2782 if (!valid_reg(reg)) break;
2783 TRACE("%lx: DW_CFA_restore %s\n",
2784 info->ip,
2785 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2786 info->state.rules[reg] = RULE_UNSET;
2787 break;
2788 }
2789 }
2790 }
2791 else switch (op)
2792 {
2793 case DW_CFA_nop:
2794 break;
2795 case DW_CFA_set_loc:
2796 {
2797 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2798 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2799 info->ip = loc;
2800 break;
2801 }
2802 case DW_CFA_advance_loc1:
2803 {
2804 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2805 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2806 info->ip += offset;
2807 break;
2808 }
2809 case DW_CFA_advance_loc2:
2810 {
2811 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2812 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2813 info->ip += offset;
2814 break;
2815 }
2816 case DW_CFA_advance_loc4:
2817 {
2818 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2819 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2820 info->ip += offset;
2821 break;
2822 }
2823 case DW_CFA_offset_extended:
2824 case DW_CFA_offset_extended_sf:
2825 {
2826 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2827 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2828 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2829 if (!valid_reg(reg)) break;
2830 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2831 info->ip,
2832 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2833 offset);
2834 info->state.regs[reg] = offset;
2835 info->state.rules[reg] = RULE_CFA_OFFSET;
2836 break;
2837 }
2838 case DW_CFA_restore_extended:
2839 {
2840 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2841 if (!valid_reg(reg)) break;
2842 TRACE("%lx: DW_CFA_restore_extended %s\n",
2843 info->ip,
2844 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2845 info->state.rules[reg] = RULE_UNSET;
2846 break;
2847 }
2848 case DW_CFA_undefined:
2849 {
2850 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2851 if (!valid_reg(reg)) break;
2852 TRACE("%lx: DW_CFA_undefined %s\n",
2853 info->ip,
2854 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2855 info->state.rules[reg] = RULE_UNDEFINED;
2856 break;
2857 }
2858 case DW_CFA_same_value:
2859 {
2860 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2861 if (!valid_reg(reg)) break;
2862 TRACE("%lx: DW_CFA_same_value %s\n",
2863 info->ip,
2864 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2865 info->state.regs[reg] = reg;
2866 info->state.rules[reg] = RULE_SAME;
2867 break;
2868 }
2869 case DW_CFA_register:
2870 {
2871 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2872 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2873 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2874 TRACE("%lx: DW_CFA_register %s == %s\n",
2875 info->ip,
2876 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2877 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, TRUE)));
2878 info->state.regs[reg] = reg2;
2879 info->state.rules[reg] = RULE_OTHER_REG;
2880 break;
2881 }
2882 case DW_CFA_remember_state:
2883 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2884 if (info->state_sp >= MAX_SAVED_STATES)
2885 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2886 else
2887 info->state_stack[info->state_sp++] = info->state;
2888 break;
2889 case DW_CFA_restore_state:
2890 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2891 if (!info->state_sp)
2892 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2893 else
2894 info->state = info->state_stack[--info->state_sp];
2895 break;
2896 case DW_CFA_def_cfa:
2897 case DW_CFA_def_cfa_sf:
2898 {
2899 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2900 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2901 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2902 if (!valid_reg(reg)) break;
2903 TRACE("%lx: DW_CFA_def_cfa %s, %ld\n",
2904 info->ip,
2905 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2906 offset);
2907 info->state.cfa_reg = reg;
2908 info->state.cfa_offset = offset;
2909 info->state.cfa_rule = RULE_CFA_OFFSET;
2910 break;
2911 }
2912 case DW_CFA_def_cfa_register:
2913 {
2914 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2915 if (!valid_reg(reg)) break;
2916 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2917 info->ip,
2918 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2919 info->state.cfa_reg = reg;
2920 info->state.cfa_rule = RULE_CFA_OFFSET;
2921 break;
2922 }
2923 case DW_CFA_def_cfa_offset:
2924 case DW_CFA_def_cfa_offset_sf:
2925 {
2926 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2927 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2928 TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset);
2929 info->state.cfa_offset = offset;
2930 info->state.cfa_rule = RULE_CFA_OFFSET;
2931 break;
2932 }
2933 case DW_CFA_def_cfa_expression:
2934 {
2935 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2936 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2937 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2938 info->state.cfa_offset = expr;
2939 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2940 ctx->data += len;
2941 break;
2942 }
2943 case DW_CFA_expression:
2944 case DW_CFA_val_expression:
2945 {
2946 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2947 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2948 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2949 if (!valid_reg(reg)) break;
2950 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2951 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2952 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2953 expr, expr + len);
2954 info->state.regs[reg] = expr;
2955 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
2956 ctx->data += len;
2957 break;
2958 }
2959 case DW_CFA_GNU_args_size:
2960 /* FIXME: should check that GCC is the compiler for this CU */
2961 {
2962 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
2963 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
2964 /* ignored */
2965 break;
2966 }
2967 default:
2968 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
2969 break;
2970 }
2971 }
2972 }
2973
2974 /* retrieve a context register from its dwarf number */
2975 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
2976 {
2977 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
2978 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2979
2980 if (sz != sizeof(ULONG_PTR))
2981 {
2982 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2983 return 0;
2984 }
2985 return *ptr;
2986 }
2987
2988 /* set a context register from its dwarf number */
2989 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
2990 ULONG_PTR val, BOOL isdebuggee)
2991 {
2992 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
2993 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2994
2995 if (isdebuggee)
2996 {
2997 char tmp[16];
2998
2999 if (sz > sizeof(tmp))
3000 {
3001 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
3002 return;
3003 }
3004 if (!sw_read_mem(csw, val, tmp, sz))
3005 {
3006 WARN("Couldn't read memory at %p\n", (void*)val);
3007 return;
3008 }
3009 memcpy(ptr, tmp, sz);
3010 }
3011 else
3012 {
3013 if (sz != sizeof(ULONG_PTR))
3014 {
3015 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
3016 return;
3017 }
3018 *ptr = val;
3019 }
3020 }
3021
3022 /* copy a register from one context to another using dwarf number */
3023 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
3024 {
3025 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst, TRUE), szdst;
3026 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc, TRUE), szsrc;
3027 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
3028 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
3029
3030 if (szdst != szsrc)
3031 {
3032 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
3033 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
3034 return;
3035 }
3036 memcpy(ptrdst, ptrsrc, szdst);
3037 }
3038
3039 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
3040 const unsigned char* zp, CONTEXT *context)
3041 {
3042 dwarf2_traverse_context_t ctx;
3043 ULONG_PTR reg, sz, tmp, stack[64];
3044 int sp = -1;
3045 ULONG_PTR len;
3046
3047 ctx.data = zp;
3048 ctx.end_data = zp + 4;
3049 len = dwarf2_leb128_as_unsigned(&ctx);
3050 ctx.end_data = ctx.data + len;
3051 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
3052
3053 while (ctx.data < ctx.end_data)
3054 {
3055 unsigned char opcode = dwarf2_parse_byte(&ctx);
3056
3057 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
3058 stack[++sp] = opcode - DW_OP_lit0;
3059 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
3060 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
3061 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
3062 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
3063 else switch (opcode)
3064 {
3065 case DW_OP_nop: break;
3066 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
3067 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
3068 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
3069 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
3070 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
3071 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
3072 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
3073 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
3074 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
3075 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
3076 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
3077 case DW_OP_deref:
3078 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
3079 {
3080 ERR("Couldn't read memory at %lx\n", stack[sp]);
3081 tmp = 0;
3082 }
3083 stack[sp] = tmp;
3084 break;
3085 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
3086 case DW_OP_drop: sp--; break;
3087 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
3088 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
3089 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
3090 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
3091 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
3092 case DW_OP_neg: stack[sp] = -stack[sp]; break;
3093 case DW_OP_not: stack[sp] = ~stack[sp]; break;
3094 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
3095 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
3096 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
3097 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
3098 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
3099 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
3100 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
3101 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
3102 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
3103 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
3104 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
3105 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
3106 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
3107 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
3108 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
3109 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
3110 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
3111 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
3112 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
3113 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
3114 case DW_OP_GNU_encoded_addr:
3115 tmp = dwarf2_parse_byte(&ctx);
3116 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
3117 break;
3118 case DW_OP_regx:
3119 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
3120 break;
3121 case DW_OP_bregx:
3122 reg = dwarf2_leb128_as_unsigned(&ctx);
3123 tmp = dwarf2_leb128_as_signed(&ctx);
3124 stack[++sp] = get_context_reg(context, reg) + tmp;
3125 break;
3126 case DW_OP_deref_size:
3127 sz = dwarf2_parse_byte(&ctx);
3128 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
3129 {
3130 ERR("Couldn't read memory at %lx\n", stack[sp]);
3131 tmp = 0;
3132 }
3133 /* do integral promotion */
3134 switch (sz)
3135 {
3136 case 1: stack[sp] = *(unsigned char*)&tmp; break;
3137 case 2: stack[sp] = *(unsigned short*)&tmp; break;
3138 case 4: stack[sp] = *(unsigned int*)&tmp; break;
3139 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
3140 default: FIXME("Unknown size for deref 0x%lx\n", sz);
3141 }
3142 break;
3143 default:
3144 FIXME("unhandled opcode %02x\n", opcode);
3145 }
3146 }
3147 return stack[sp];
3148 }
3149
3150 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
3151 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa)
3152 {
3153 unsigned int i;
3154 ULONG_PTR value;
3155 CONTEXT new_context = *context;
3156
3157 switch (state->cfa_rule)
3158 {
3159 case RULE_EXPRESSION:
3160 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3161 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa)))
3162 {
3163 WARN("Couldn't read memory at %p\n", (void*)*cfa);
3164 return;
3165 }
3166 break;
3167 case RULE_VAL_EXPRESSION:
3168 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3169 break;
3170 default:
3171 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset;
3172 break;
3173 }
3174 if (!*cfa) return;
3175
3176 for (i = 0; i < NB_FRAME_REGS; i++)
3177 {
3178 switch (state->rules[i])
3179 {
3180 case RULE_UNSET:
3181 case RULE_UNDEFINED:
3182 case RULE_SAME:
3183 break;
3184 case RULE_CFA_OFFSET:
3185 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE);
3186 break;
3187 case RULE_OTHER_REG:
3188 copy_context_reg(&new_context, i, context, state->regs[i]);
3189 break;
3190 case RULE_EXPRESSION:
3191 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3192 set_context_reg(csw, &new_context, i, value, TRUE);
3193 break;
3194 case RULE_VAL_EXPRESSION:
3195 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3196 set_context_reg(csw, &new_context, i, value, FALSE);
3197 break;
3198 }
3199 }
3200 *context = new_context;
3201 }
3202
3203 /***********************************************************************
3204 * dwarf2_virtual_unwind
3205 *
3206 */
3207 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
3208 {
3209 struct module_pair pair;
3210 struct frame_info info;
3211 dwarf2_traverse_context_t cie_ctx, fde_ctx;
3212 struct module_format* modfmt;
3213 const unsigned char* end;
3214 DWORD_PTR delta;
3215
3216 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
3217 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
3218 !module_get_debug(&pair))
3219 return FALSE;
3220 modfmt = pair.effective->format_info[DFI_DWARF];
3221 if (!modfmt) return FALSE;
3222 memset(&info, 0, sizeof(info));
3223 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
3224 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
3225 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3226 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
3227 * in this process the IMAGE section at a different address as the one expected by
3228 * the image
3229 */
3230 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
3231 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
3232 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
3233 {
3234 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
3235 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
3236 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3237 delta = pair.effective->reloc_delta;
3238 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
3239 {
3240 TRACE("Couldn't find information for %lx\n", ip);
3241 return FALSE;
3242 }
3243 }
3244
3245 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
3246 ip, info.ip, info.code_align, info.data_align,
3247 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg, TRUE)));
3248
3249 /* if at very beginning of function, return and use default unwinder */
3250 if (ip == info.ip) return FALSE;
3251 execute_cfa_instructions(&cie_ctx, ip, &info);
3252
3253 if (info.aug_z_format) /* get length of augmentation data */
3254 {
3255 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
3256 end = fde_ctx.data + len;
3257 }
3258 else end = NULL;
3259 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
3260 if (end) fde_ctx.data = end;
3261
3262 execute_cfa_instructions(&fde_ctx, ip, &info);
3263
3264 /* if there is no information about retaddr, use default unwinder */
3265 if (info.state.rules[info.retaddr_reg] == RULE_UNSET) return FALSE;
3266
3267 apply_frame_state(pair.effective, csw, context, &info.state, cfa);
3268
3269 return TRUE;
3270 }
3271
3272 static void dwarf2_location_compute(struct process* pcs,
3273 const struct module_format* modfmt,
3274 const struct symt_function* func,
3275 struct location* loc)
3276 {
3277 struct location frame;
3278 DWORD_PTR ip;
3279 int err;
3280 dwarf2_traverse_context_t lctx;
3281
3282 if (!func->container || func->container->tag != SymTagCompiland)
3283 {
3284 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
3285 err = loc_err_internal;
3286 }
3287 else
3288 {
3289 /* instruction pointer relative to compiland's start */
3290 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
3291
3292 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
3293 {
3294 switch (loc->kind)
3295 {
3296 case loc_dwarf2_location_list:
3297 /* Then, if the variable has a location list, find it !! */
3298 if (dwarf2_lookup_loclist(modfmt,
3299 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
3300 ip, &lctx))
3301 goto do_compute;
3302 err = loc_err_out_of_scope;
3303 break;
3304 case loc_dwarf2_block:
3305 /* or if we have a copy of an existing block, get ready for it */
3306 {
3307 unsigned* ptr = (unsigned*)loc->offset;
3308
3309 lctx.data = (const BYTE*)(ptr + 1);
3310 lctx.end_data = lctx.data + *ptr;
3311 lctx.word_size = modfmt->u.dwarf2_info->word_size;
3312 }
3313 do_compute:
3314 /* now get the variable */
3315 err = compute_location(&lctx, loc, pcs->handle, &frame);
3316 break;
3317 case loc_register:
3318 case loc_regrel:
3319 /* nothing to do */
3320 break;
3321 default:
3322 WARN("Unsupported local kind %d\n", loc->kind);
3323 err = loc_err_internal;
3324 }
3325 }
3326 }
3327 if (err < 0)
3328 {
3329 loc->kind = loc_register;
3330 loc->reg = err;
3331 }
3332 }
3333
3334 #ifdef HAVE_ZLIB
3335 static void *zalloc(void *priv, uInt items, uInt sz)
3336 {
3337 return HeapAlloc(GetProcessHeap(), 0, items * sz);
3338 }
3339
3340 static void zfree(void *priv, void *addr)
3341 {
3342 HeapFree(GetProcessHeap(), 0, addr);
3343 }
3344
3345 static inline BOOL dwarf2_init_zsection(dwarf2_section_t* section,
3346 const char* zsectname,
3347 struct image_section_map* ism)
3348 {
3349 z_stream z;
3350 LARGE_INTEGER li;
3351 int res;
3352 BOOL ret = FALSE;
3353
3354 BYTE *addr, *sect = (BYTE *)image_map_section(ism);
3355 size_t sz = image_get_map_size(ism);
3356
3357 if (sz <= 12 || memcmp(sect, "ZLIB", 4))
3358 {
3359 ERR("invalid compressed section %s\n", zsectname);
3360 goto out;
3361 }
3362
3363 #ifdef WORDS_BIGENDIAN
3364 li.u.HighPart = *(DWORD*)&sect[4];
3365 li.u.LowPart = *(DWORD*)&sect[8];
3366 #else
3367 li.u.HighPart = RtlUlongByteSwap(*(DWORD*)&sect[4]);
3368 li.u.LowPart = RtlUlongByteSwap(*(DWORD*)&sect[8]);
3369 #endif
3370
3371 addr = HeapAlloc(GetProcessHeap(), 0, li.QuadPart);
3372 if (!addr)
3373 goto out;
3374
3375 z.next_in = &sect[12];
3376 z.avail_in = sz - 12;
3377 z.opaque = NULL;
3378 z.zalloc = zalloc;
3379 z.zfree = zfree;
3380
3381 res = inflateInit(&z);
3382 if (res != Z_OK)
3383 {
3384 FIXME("inflateInit failed with %i / %s\n", res, z.msg);
3385 goto out_free;
3386 }
3387
3388 do {
3389 z.next_out = addr + z.total_out;
3390 z.avail_out = li.QuadPart - z.total_out;
3391 res = inflate(&z, Z_FINISH);
3392 } while (z.avail_in && res == Z_STREAM_END);
3393
3394 if (res != Z_STREAM_END)
3395 {
3396 FIXME("Decompression failed with %i / %s\n", res, z.msg);
3397 goto out_end;
3398 }
3399
3400 ret = TRUE;
3401 section->compressed = TRUE;
3402 section->address = addr;
3403 section->rva = image_get_map_rva(ism);
3404 section->size = z.total_out;
3405
3406 out_end:
3407 inflateEnd(&z);
3408 out_free:
3409 if (!ret)
3410 HeapFree(GetProcessHeap(), 0, addr);
3411 out:
3412 image_unmap_section(ism);
3413 return ret;
3414 }
3415
3416 #endif
3417
3418 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
3419 const char* sectname, const char* zsectname,
3420 struct image_section_map* ism)
3421 {
3422 struct image_section_map local_ism;
3423
3424 if (!ism) ism = &local_ism;
3425
3426 section->compressed = FALSE;
3427 if (image_find_section(fmap, sectname, ism))
3428 {
3429 section->address = (const BYTE*)image_map_section(ism);
3430 section->size = image_get_map_size(ism);
3431 section->rva = image_get_map_rva(ism);
3432 return TRUE;
3433 }
3434
3435 section->address = NULL;
3436 section->size = 0;
3437 section->rva = 0;
3438
3439 if (zsectname && image_find_section(fmap, zsectname, ism))
3440 {
3441 #ifdef HAVE_ZLIB
3442 return dwarf2_init_zsection(section, zsectname, ism);
3443 #else
3444 FIXME("dbghelp not built with zlib, but compressed section found\n" );
3445 #endif
3446 }
3447
3448 return FALSE;
3449 }
3450
3451 static inline void dwarf2_fini_section(dwarf2_section_t* section)
3452 {
3453 if (section->compressed)
3454 HeapFree(GetProcessHeap(), 0, (void*)section->address);
3455 }
3456
3457 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3458 {
3459 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_loc);
3460 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_frame);
3461 HeapFree(GetProcessHeap(), 0, modfmt);
3462 }
3463
3464 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
3465 const struct elf_thunk_area* thunks,
3466 struct image_file_map* fmap)
3467 {
3468 dwarf2_section_t eh_frame, section[section_max];
3469 dwarf2_traverse_context_t mod_ctx;
3470 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3471 debug_line_sect, debug_ranges_sect, eh_frame_sect;
3472 BOOL ret = TRUE;
3473 struct module_format* dwarf2_modfmt;
3474
3475 dwarf2_init_section(&eh_frame, fmap, ".eh_frame", NULL, &eh_frame_sect);
3476 dwarf2_init_section(&section[section_debug], fmap, ".debug_info", ".zdebug_info", &debug_sect);
3477 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", ".zdebug_abbrev", &debug_abbrev_sect);
3478 dwarf2_init_section(&section[section_string], fmap, ".debug_str", ".zdebug_str", &debug_str_sect);
3479 dwarf2_init_section(&section[section_line], fmap, ".debug_line", ".zdebug_line", &debug_line_sect);
3480 dwarf2_init_section(&section[section_ranges], fmap, ".debug_ranges", ".zdebug_ranges", &debug_ranges_sect);
3481
3482 /* to do anything useful we need either .eh_frame or .debug_info */
3483 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) &&
3484 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP))
3485 {
3486 ret = FALSE;
3487 goto leave;
3488 }
3489
3490 if (fmap->modtype == DMT_ELF && debug_sect.fmap)
3491 {
3492 /* debug info might have a different base address than .so file
3493 * when elf file is prelinked after splitting off debug info
3494 * adjust symbol base addresses accordingly
3495 */
3496 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3497 }
3498
3499 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3500
3501 mod_ctx.data = section[section_debug].address;
3502 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3503 mod_ctx.word_size = 0; /* will be correctly set later on */
3504
3505 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3506 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3507 if (!dwarf2_modfmt)
3508 {
3509 ret = FALSE;
3510 goto leave;
3511 }
3512 dwarf2_modfmt->module = module;
3513 dwarf2_modfmt->remove = dwarf2_module_remove;
3514 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3515 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3516 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3517 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3518
3519 /* As we'll need later some sections' content, we won't unmap these
3520 * sections upon existing this function
3521 */
3522 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", ".zdebug_loc", NULL);
3523 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", ".zdebug_frame", NULL);
3524 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame;
3525
3526 while (mod_ctx.data < mod_ctx.end_data)
3527 {
3528 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3529 }
3530 dwarf2_modfmt->module->module.SymType = SymDia;
3531 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3532 /* FIXME: we could have a finer grain here */
3533 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3534 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3535 dwarf2_modfmt->module->module.SourceIndexed = TRUE;
3536 dwarf2_modfmt->module->module.Publics = TRUE;
3537
3538 /* set the word_size for eh_frame parsing */
3539 dwarf2_modfmt->u.dwarf2_info->word_size = fmap->addr_size / 8;
3540
3541 leave:
3542 dwarf2_fini_section(&section[section_debug]);
3543 dwarf2_fini_section(&section[section_abbrev]);
3544 dwarf2_fini_section(&section[section_string]);
3545 dwarf2_fini_section(&section[section_line]);
3546 dwarf2_fini_section(&section[section_ranges]);
3547
3548 image_unmap_section(&debug_sect);
3549 image_unmap_section(&debug_abbrev_sect);
3550 image_unmap_section(&debug_str_sect);
3551 image_unmap_section(&debug_line_sect);
3552 image_unmap_section(&debug_ranges_sect);
3553 if (!ret) image_unmap_section(&eh_frame_sect);
3554
3555 return ret;
3556 }
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