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d3d9/tests: Don't test function directly when reporting GetLastError().
[wine/wine-gecko.git] / dlls / dbghelp / dwarf.c
blob20bd08044c978f086b400d51db5db9c2e719c49a
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 #define NONAMELESSUNION
24
25 #include "config.h"
26
27 #include <sys/types.h>
28 #include <fcntl.h>
29 #ifdef HAVE_SYS_STAT_H
30 # include <sys/stat.h>
31 #endif
32 #ifdef HAVE_SYS_MMAN_H
33 #include <sys/mman.h>
34 #endif
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #ifdef HAVE_UNISTD_H
39 # include <unistd.h>
40 #endif
41 #include <stdio.h>
42 #ifndef PATH_MAX
43 #define PATH_MAX MAX_PATH
44 #endif
45 #include <assert.h>
46 #include <stdarg.h>
47
48 #include "windef.h"
49 #include "winbase.h"
50 #include "winuser.h"
51 #include "ole2.h"
52 #include "oleauto.h"
53
54 #include "dbghelp_private.h"
55 #include "image_private.h"
56
57 #include "wine/debug.h"
58
59 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
60
61 /* FIXME:
62 * - Functions:
63 * o unspecified parameters
64 * o inlined functions
65 * o Debug{Start|End}Point
66 * o CFA
67 * - Udt
68 * o proper types loading (nesting)
69 */
70
71 #if 0
72 static void dump(const void* ptr, unsigned len)
73 {
74 int i, j;
75 BYTE msg[128];
76 static const char hexof[] = "0123456789abcdef";
77 const BYTE* x = ptr;
78
79 for (i = 0; i < len; i += 16)
80 {
81 sprintf(msg, "%08x: ", i);
82 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
83 for (j = 0; j < min(16, len - i); j++)
84 {
85 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
86 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
87 msg[10 + 3 * j + 2] = ' ';
88 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
89 x[i + j] : '.';
90 }
91 msg[10 + 3 * 16] = ' ';
92 msg[10 + 3 * 16 + 1 + 16] = '\0';
93 TRACE("%s\n", msg);
94 }
95 }
96 #endif
97
98 /**
99 *
100 * Main Specs:
101 * http://www.eagercon.com/dwarf/dwarf3std.htm
102 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
103 *
104 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
105 *
106 * example of projects who do dwarf2 parsing:
107 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
108 * http://elis.ugent.be/diota/log/ltrace_elf.c
109 */
110 #include "dwarf.h"
111
112 /**
113 * Parsers
114 */
115
116 typedef struct dwarf2_abbrev_entry_attr_s
117 {
118 unsigned long attribute;
119 unsigned long form;
120 struct dwarf2_abbrev_entry_attr_s* next;
121 } dwarf2_abbrev_entry_attr_t;
122
123 typedef struct dwarf2_abbrev_entry_s
124 {
125 unsigned long entry_code;
126 unsigned long tag;
127 unsigned char have_child;
128 unsigned num_attr;
129 dwarf2_abbrev_entry_attr_t* attrs;
130 } dwarf2_abbrev_entry_t;
131
132 struct dwarf2_block
133 {
134 unsigned size;
135 const unsigned char* ptr;
136 };
137
138 struct attribute
139 {
140 unsigned long form;
141 enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from;
142 union
143 {
144 unsigned long uvalue;
145 ULONGLONG lluvalue;
146 long svalue;
147 const char* string;
148 struct dwarf2_block block;
149 } u;
150 };
151
152 typedef struct dwarf2_debug_info_s
153 {
154 const dwarf2_abbrev_entry_t*abbrev;
155 struct symt* symt;
156 const unsigned char** data;
157 struct vector children;
158 struct dwarf2_debug_info_s* parent;
159 } dwarf2_debug_info_t;
160
161 typedef struct dwarf2_section_s
162 {
163 const unsigned char* address;
164 unsigned size;
165 DWORD_PTR rva;
166 } dwarf2_section_t;
167
168 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max};
169
170 typedef struct dwarf2_traverse_context_s
171 {
172 const unsigned char* data;
173 const unsigned char* end_data;
174 unsigned char word_size;
175 } dwarf2_traverse_context_t;
176
177 /* symt_cache indexes */
178 #define sc_void 0
179 #define sc_int1 1
180 #define sc_int2 2
181 #define sc_int4 3
182 #define sc_num 4
183
184 typedef struct dwarf2_parse_context_s
185 {
186 const dwarf2_section_t* sections;
187 unsigned section;
188 struct pool pool;
189 struct module* module;
190 struct symt_compiland* compiland;
191 const struct elf_thunk_area*thunks;
192 struct sparse_array abbrev_table;
193 struct sparse_array debug_info_table;
194 unsigned long load_offset;
195 unsigned long ref_offset;
196 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
197 char* cpp_name;
198 } dwarf2_parse_context_t;
199
200 /* stored in the dbghelp's module internal structure for later reuse */
201 struct dwarf2_module_info_s
202 {
203 dwarf2_section_t debug_loc;
204 dwarf2_section_t debug_frame;
205 dwarf2_section_t eh_frame;
206 unsigned char word_size;
207 };
208
209 #define loc_dwarf2_location_list (loc_user + 0)
210 #define loc_dwarf2_block (loc_user + 1)
211
212 /* forward declarations */
213 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
214
215 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
216 {
217 return *ptr;
218 }
219
220 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
221 {
222 unsigned char uvalue = dwarf2_get_byte(ctx->data);
223 ctx->data += 1;
224 return uvalue;
225 }
226
227 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
228 {
229 return *(const UINT16*)ptr;
230 }
231
232 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
233 {
234 unsigned short uvalue = dwarf2_get_u2(ctx->data);
235 ctx->data += 2;
236 return uvalue;
237 }
238
239 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
240 {
241 return *(const UINT32*)ptr;
242 }
243
244 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
245 {
246 unsigned long uvalue = dwarf2_get_u4(ctx->data);
247 ctx->data += 4;
248 return uvalue;
249 }
250
251 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
252 {
253 return *(const UINT64*)ptr;
254 }
255
256 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
257 {
258 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
259 ctx->data += 8;
260 return uvalue;
261 }
262
263 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
264 {
265 unsigned long ret = 0;
266 unsigned char byte;
267 unsigned shift = 0;
268
269 do
270 {
271 byte = dwarf2_get_byte(ptr++);
272 ret |= (byte & 0x7f) << shift;
273 shift += 7;
274 } while (byte & 0x80);
275
276 if (end) *end = ptr;
277 return ret;
278 }
279
280 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
281 {
282 unsigned long ret;
283
284 assert(ctx);
285
286 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
287
288 return ret;
289 }
290
291 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
292 {
293 long ret = 0;
294 unsigned char byte;
295 unsigned shift = 0;
296 const unsigned size = sizeof(int) * 8;
297
298 do
299 {
300 byte = dwarf2_get_byte(ptr++);
301 ret |= (byte & 0x7f) << shift;
302 shift += 7;
303 } while (byte & 0x80);
304 if (end) *end = ptr;
305
306 /* as spec: sign bit of byte is 2nd high order bit (80x40)
307 * -> 0x80 is used as flag.
308 */
309 if ((shift < size) && (byte & 0x40))
310 {
311 ret |= - (1 << shift);
312 }
313 return ret;
314 }
315
316 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
317 {
318 long ret = 0;
319
320 assert(ctx);
321
322 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
323 return ret;
324 }
325
326 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
327 {
328 unsigned ret;
329 for (ret = 0; ctx->data[ret] & 0x80; ret++);
330 return ret + 1;
331 }
332
333 /******************************************************************
334 * dwarf2_get_addr
335 *
336 * Returns an address.
337 * We assume that in all cases word size from Dwarf matches the size of
338 * addresses in platform where the exec is compiled.
339 */
340 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
341 {
342 unsigned long ret;
343
344 switch (word_size)
345 {
346 case 4:
347 ret = dwarf2_get_u4(ptr);
348 break;
349 case 8:
350 ret = dwarf2_get_u8(ptr);
351 break;
352 default:
353 FIXME("Unsupported Word Size %u\n", word_size);
354 ret = 0;
355 }
356 return ret;
357 }
358
359 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
360 {
361 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
362 ctx->data += ctx->word_size;
363 return ret;
364 }
365
366 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
367 {
368 return wine_dbg_sprintf("ctx(%p)", ctx->data);
369 }
370
371 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
372 {
373 return wine_dbg_sprintf("ctx(%p,%s)",
374 ctx, debugstr_w(ctx->module->module.ModuleName));
375 }
376
377 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
378 {
379 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
380 di->abbrev, di->symt);
381 }
382
383 static dwarf2_abbrev_entry_t*
384 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
385 unsigned long entry_code)
386 {
387 assert( NULL != abbrev_table );
388 return sparse_array_find(abbrev_table, entry_code);
389 }
390
391 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
392 struct sparse_array* abbrev_table,
393 struct pool* pool)
394 {
395 unsigned long entry_code;
396 dwarf2_abbrev_entry_t* abbrev_entry;
397 dwarf2_abbrev_entry_attr_t* new = NULL;
398 dwarf2_abbrev_entry_attr_t* last = NULL;
399 unsigned long attribute;
400 unsigned long form;
401
402 assert( NULL != abbrev_ctx );
403
404 TRACE("%s, end at %p\n",
405 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
406
407 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
408 while (abbrev_ctx->data < abbrev_ctx->end_data)
409 {
410 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
411 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
412 TRACE("found entry_code %lu\n", entry_code);
413 if (!entry_code)
414 {
415 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
416 break;
417 }
418 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
419 assert( NULL != abbrev_entry );
420
421 abbrev_entry->entry_code = entry_code;
422 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
423 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
424 abbrev_entry->attrs = NULL;
425 abbrev_entry->num_attr = 0;
426
427 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
428 abbrev_table, sparse_array_length(abbrev_table),
429 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
430
431 last = NULL;
432 while (1)
433 {
434 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
435 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
436 if (!attribute) break;
437
438 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
439 assert(new);
440
441 new->attribute = attribute;
442 new->form = form;
443 new->next = NULL;
444 if (abbrev_entry->attrs) last->next = new;
445 else abbrev_entry->attrs = new;
446 last = new;
447 abbrev_entry->num_attr++;
448 }
449 }
450 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
451 }
452
453 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
454 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
455 {
456 unsigned step;
457
458 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
459
460 switch (abbrev_attr->form)
461 {
462 case DW_FORM_ref_addr:
463 case DW_FORM_addr: step = ctx->word_size; break;
464 case DW_FORM_flag:
465 case DW_FORM_data1:
466 case DW_FORM_ref1: step = 1; break;
467 case DW_FORM_data2:
468 case DW_FORM_ref2: step = 2; break;
469 case DW_FORM_data4:
470 case DW_FORM_ref4:
471 case DW_FORM_strp: step = 4; break;
472 case DW_FORM_data8:
473 case DW_FORM_ref8: step = 8; break;
474 case DW_FORM_sdata:
475 case DW_FORM_ref_udata:
476 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
477 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
478 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
479 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
480 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
481 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
482 default:
483 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
484 return;
485 }
486 ctx->data += step;
487 }
488
489 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
490 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
491 const unsigned char* data,
492 struct attribute* attr)
493 {
494 attr->form = abbrev_attr->form;
495 switch (attr->form)
496 {
497 case DW_FORM_ref_addr:
498 case DW_FORM_addr:
499 attr->u.uvalue = dwarf2_get_addr(data,
500 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
501 TRACE("addr<0x%lx>\n", attr->u.uvalue);
502 break;
503
504 case DW_FORM_flag:
505 attr->u.uvalue = dwarf2_get_byte(data);
506 TRACE("flag<0x%lx>\n", attr->u.uvalue);
507 break;
508
509 case DW_FORM_data1:
510 attr->u.uvalue = dwarf2_get_byte(data);
511 TRACE("data1<%lu>\n", attr->u.uvalue);
512 break;
513
514 case DW_FORM_data2:
515 attr->u.uvalue = dwarf2_get_u2(data);
516 TRACE("data2<%lu>\n", attr->u.uvalue);
517 break;
518
519 case DW_FORM_data4:
520 attr->u.uvalue = dwarf2_get_u4(data);
521 TRACE("data4<%lu>\n", attr->u.uvalue);
522 break;
523
524 case DW_FORM_data8:
525 attr->u.lluvalue = dwarf2_get_u8(data);
526 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
527 break;
528
529 case DW_FORM_ref1:
530 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
531 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
532 break;
533
534 case DW_FORM_ref2:
535 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
536 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
537 break;
538
539 case DW_FORM_ref4:
540 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
541 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
542 break;
543
544 case DW_FORM_ref8:
545 FIXME("Unhandled 64 bit support\n");
546 break;
547
548 case DW_FORM_sdata:
549 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
550 break;
551
552 case DW_FORM_ref_udata:
553 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
554 break;
555
556 case DW_FORM_udata:
557 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
558 break;
559
560 case DW_FORM_string:
561 attr->u.string = (const char *)data;
562 TRACE("string<%s>\n", attr->u.string);
563 break;
564
565 case DW_FORM_strp:
566 {
567 unsigned long offset = dwarf2_get_u4(data);
568 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
569 }
570 TRACE("strp<%s>\n", attr->u.string);
571 break;
572
573 case DW_FORM_block:
574 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
575 break;
576
577 case DW_FORM_block1:
578 attr->u.block.size = dwarf2_get_byte(data);
579 attr->u.block.ptr = data + 1;
580 break;
581
582 case DW_FORM_block2:
583 attr->u.block.size = dwarf2_get_u2(data);
584 attr->u.block.ptr = data + 2;
585 break;
586
587 case DW_FORM_block4:
588 attr->u.block.size = dwarf2_get_u4(data);
589 attr->u.block.ptr = data + 4;
590 break;
591
592 default:
593 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
594 break;
595 }
596 }
597
598 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
599 const dwarf2_debug_info_t* di,
600 unsigned at, struct attribute* attr)
601 {
602 unsigned i, refidx = 0;
603 dwarf2_abbrev_entry_attr_t* abbrev_attr;
604 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL;
605
606 attr->gotten_from = attr_direct;
607 while (di)
608 {
609 ref_abbrev_attr = NULL;
610 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
611 {
612 if (abbrev_attr->attribute == at)
613 {
614 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
615 return TRUE;
616 }
617 if ((abbrev_attr->attribute == DW_AT_abstract_origin ||
618 abbrev_attr->attribute == DW_AT_specification) &&
619 at != DW_AT_sibling)
620 {
621 if (ref_abbrev_attr)
622 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute);
623 ref_abbrev_attr = abbrev_attr;
624 refidx = i;
625 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ?
626 attr_abstract_origin : attr_specification;
627 }
628 }
629 /* do we have either an abstract origin or a specification debug entry to look into ? */
630 if (!ref_abbrev_attr) break;
631 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr);
632 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
633 FIXME("Should have found the debug info entry\n");
634 }
635 return FALSE;
636 }
637
638 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*);
639
640 #define Wine_DW_no_register 0x7FFFFFFF
641
642 static unsigned dwarf2_map_register(int regno)
643 {
644 if (regno == Wine_DW_no_register)
645 {
646 FIXME("What the heck map reg 0x%x\n",regno);
647 return 0;
648 }
649 return dbghelp_current_cpu->map_dwarf_register(regno);
650 }
651
652 static enum location_error
653 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
654 HANDLE hproc, const struct location* frame)
655 {
656 DWORD_PTR tmp, stack[64];
657 unsigned stk;
658 unsigned char op;
659 BOOL piece_found = FALSE;
660
661 stack[stk = 0] = 0;
662
663 loc->kind = loc_absolute;
664 loc->reg = Wine_DW_no_register;
665
666 while (ctx->data < ctx->end_data)
667 {
668 op = dwarf2_parse_byte(ctx);
669
670 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
671 stack[++stk] = op - DW_OP_lit0;
672 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
673 {
674 /* dbghelp APIs don't know how to cope with this anyway
675 * (for example 'long long' stored in two registers)
676 * FIXME: We should tell winedbg how to deal with it (sigh)
677 */
678 if (!piece_found)
679 {
680 DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0);
681 if (loc->reg != Wine_DW_no_register)
682 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n",
683 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
684 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
685 loc->reg = cvreg;
686 }
687 loc->kind = loc_register;
688 }
689 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
690 {
691 /* dbghelp APIs don't know how to cope with this anyway
692 * (for example 'long long' stored in two registers)
693 * FIXME: We should tell winedbg how to deal with it (sigh)
694 */
695 if (!piece_found)
696 {
697 DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0);
698 if (loc->reg != Wine_DW_no_register)
699 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n",
700 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
701 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
702 loc->reg = cvreg;
703 }
704 stack[++stk] = dwarf2_leb128_as_signed(ctx);
705 loc->kind = loc_regrel;
706 }
707 else switch (op)
708 {
709 case DW_OP_nop: break;
710 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
711 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
712 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
713 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
714 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
715 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
716 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
717 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
718 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
719 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
720 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
721 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
722 case DW_OP_drop: stk--; break;
723 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
724 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
725 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
726 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
727 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
728 case DW_OP_neg: stack[stk] = -stack[stk]; break;
729 case DW_OP_not: stack[stk] = ~stack[stk]; break;
730 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
731 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
732 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
733 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
734 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
735 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
736 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
737 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
738 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
739 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
740 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
741 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
742 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
743 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
744 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
745 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
746 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
747 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
748 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
749 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
750 case DW_OP_regx:
751 tmp = dwarf2_leb128_as_unsigned(ctx);
752 if (!piece_found)
753 {
754 if (loc->reg != Wine_DW_no_register)
755 FIXME("Only supporting one reg\n");
756 loc->reg = dwarf2_map_register(tmp);
757 }
758 loc->kind = loc_register;
759 break;
760 case DW_OP_bregx:
761 tmp = dwarf2_leb128_as_unsigned(ctx);
762 if (loc->reg != Wine_DW_no_register)
763 FIXME("Only supporting one regx\n");
764 loc->reg = dwarf2_map_register(tmp);
765 stack[++stk] = dwarf2_leb128_as_signed(ctx);
766 loc->kind = loc_regrel;
767 break;
768 case DW_OP_fbreg:
769 if (loc->reg != Wine_DW_no_register)
770 FIXME("Only supporting one reg (%s/%d -> -2)\n",
771 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg);
772 if (frame && frame->kind == loc_register)
773 {
774 loc->kind = loc_regrel;
775 loc->reg = frame->reg;
776 stack[++stk] = dwarf2_leb128_as_signed(ctx);
777 }
778 else if (frame && frame->kind == loc_regrel)
779 {
780 loc->kind = loc_regrel;
781 loc->reg = frame->reg;
782 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
783 }
784 else
785 {
786 /* FIXME: this could be later optimized by not recomputing
787 * this very location expression
788 */
789 loc->kind = loc_dwarf2_block;
790 stack[++stk] = dwarf2_leb128_as_signed(ctx);
791 }
792 break;
793 case DW_OP_piece:
794 {
795 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
796 WARN("Not handling OP_piece (size=%d)\n", sz);
797 piece_found = TRUE;
798 }
799 break;
800 case DW_OP_deref:
801 if (!stk)
802 {
803 FIXME("Unexpected empty stack\n");
804 return loc_err_internal;
805 }
806 if (loc->reg != Wine_DW_no_register)
807 {
808 WARN("Too complex expression for deref\n");
809 return loc_err_too_complex;
810 }
811 if (hproc)
812 {
813 DWORD_PTR addr = stack[stk--];
814 DWORD_PTR deref;
815
816 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
817 {
818 WARN("Couldn't read memory at %lx\n", addr);
819 return loc_err_cant_read;
820 }
821 stack[++stk] = deref;
822 }
823 else
824 {
825 loc->kind = loc_dwarf2_block;
826 }
827 break;
828 case DW_OP_deref_size:
829 if (!stk)
830 {
831 FIXME("Unexpected empty stack\n");
832 return loc_err_internal;
833 }
834 if (loc->reg != Wine_DW_no_register)
835 {
836 WARN("Too complex expression for deref\n");
837 return loc_err_too_complex;
838 }
839 if (hproc)
840 {
841 DWORD_PTR addr = stack[stk--];
842 BYTE derefsize = dwarf2_parse_byte(ctx);
843 DWORD64 deref;
844
845 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
846 {
847 WARN("Couldn't read memory at %lx\n", addr);
848 return loc_err_cant_read;
849 }
850
851 switch (derefsize)
852 {
853 case 1: stack[++stk] = *(unsigned char*)&deref; break;
854 case 2: stack[++stk] = *(unsigned short*)&deref; break;
855 case 4: stack[++stk] = *(DWORD*)&deref; break;
856 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
857 }
858 }
859 else
860 {
861 dwarf2_parse_byte(ctx);
862 loc->kind = loc_dwarf2_block;
863 }
864 break;
865 case DW_OP_stack_value:
866 /* Expected behaviour is that this is the last instruction of this
867 * expression and just the "top of stack" value should be put to loc->offset. */
868 break;
869 default:
870 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
871 FIXME("Unhandled attr op: %x\n", op);
872 /* FIXME else unhandled extension */
873 return loc_err_internal;
874 }
875 }
876 loc->offset = stack[stk];
877 return 0;
878 }
879
880 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
881 const dwarf2_debug_info_t* di,
882 unsigned long dw,
883 struct location* loc,
884 const struct location* frame)
885 {
886 struct attribute xloc;
887
888 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
889
890 switch (xloc.form)
891 {
892 case DW_FORM_data1: case DW_FORM_data2:
893 case DW_FORM_udata: case DW_FORM_sdata:
894 loc->kind = loc_absolute;
895 loc->reg = 0;
896 loc->offset = xloc.u.uvalue;
897 return TRUE;
898 case DW_FORM_data4: case DW_FORM_data8:
899 loc->kind = loc_dwarf2_location_list;
900 loc->reg = Wine_DW_no_register;
901 loc->offset = xloc.u.uvalue;
902 return TRUE;
903 case DW_FORM_block:
904 case DW_FORM_block1:
905 case DW_FORM_block2:
906 case DW_FORM_block4:
907 break;
908 default: FIXME("Unsupported yet form %lx\n", xloc.form);
909 return FALSE;
910 }
911
912 /* assume we have a block form */
913
914 if (xloc.u.block.size)
915 {
916 dwarf2_traverse_context_t lctx;
917 enum location_error err;
918
919 lctx.data = xloc.u.block.ptr;
920 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
921 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
922
923 err = compute_location(&lctx, loc, NULL, frame);
924 if (err < 0)
925 {
926 loc->kind = loc_error;
927 loc->reg = err;
928 }
929 else if (loc->kind == loc_dwarf2_block)
930 {
931 unsigned* ptr = pool_alloc(&ctx->module->pool,
932 sizeof(unsigned) + xloc.u.block.size);
933 *ptr = xloc.u.block.size;
934 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
935 loc->offset = (unsigned long)ptr;
936 }
937 }
938 return TRUE;
939 }
940
941 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
942 const dwarf2_debug_info_t* di)
943 {
944 struct attribute attr;
945 dwarf2_debug_info_t* type;
946
947 if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
948 return NULL;
949 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
950 {
951 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
952 return NULL;
953 }
954 if (!type->symt)
955 {
956 /* load the debug info entity */
957 dwarf2_load_one_entry(ctx, type);
958 if (!type->symt)
959 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
960 }
961 return type->symt;
962 }
963
964 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name)
965 {
966 char* last;
967 struct attribute diname;
968 struct attribute spec;
969
970 if (di->abbrev->tag == DW_TAG_compile_unit) return name;
971 if (!ctx->cpp_name)
972 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME);
973 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1;
974 strcpy(last, name);
975
976 /* if the di is a definition, but has also a (previous) declaration, then scope must
977 * be gotten from declaration not definition
978 */
979 if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct)
980 {
981 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue);
982 if (!di)
983 {
984 FIXME("Should have found the debug info entry\n");
985 return NULL;
986 }
987 }
988
989 for (di = di->parent; di; di = di->parent)
990 {
991 switch (di->abbrev->tag)
992 {
993 case DW_TAG_namespace:
994 case DW_TAG_structure_type:
995 case DW_TAG_class_type:
996 case DW_TAG_interface_type:
997 case DW_TAG_union_type:
998 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname))
999 {
1000 size_t len = strlen(diname.u.string);
1001 last -= 2 + len;
1002 if (last < ctx->cpp_name) return NULL;
1003 memcpy(last, diname.u.string, len);
1004 last[len] = last[len + 1] = ':';
1005 }
1006 break;
1007 default:
1008 break;
1009 }
1010 }
1011 return last;
1012 }
1013
1014 /******************************************************************
1015 * dwarf2_read_range
1016 *
1017 * read a range for a given debug_info (either using AT_range attribute, in which
1018 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
1019 * in all cases, range is relative to beginning of compilation unit
1020 */
1021 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di,
1022 unsigned long* plow, unsigned long* phigh)
1023 {
1024 struct attribute range;
1025
1026 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range))
1027 {
1028 dwarf2_traverse_context_t traverse;
1029 unsigned long low, high;
1030
1031 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
1032 traverse.end_data = ctx->sections[section_ranges].address +
1033 ctx->sections[section_ranges].size;
1034 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1035
1036 *plow = ULONG_MAX;
1037 *phigh = 0;
1038 while (traverse.data + 2 * traverse.word_size < traverse.end_data)
1039 {
1040 low = dwarf2_parse_addr(&traverse);
1041 high = dwarf2_parse_addr(&traverse);
1042 if (low == 0 && high == 0) break;
1043 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
1044 if (low < *plow) *plow = low;
1045 if (high > *phigh) *phigh = high;
1046 }
1047 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
1048 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
1049
1050 return TRUE;
1051 }
1052 else
1053 {
1054 struct attribute low_pc;
1055 struct attribute high_pc;
1056
1057 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
1058 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
1059 return FALSE;
1060 *plow = low_pc.u.uvalue;
1061 *phigh = high_pc.u.uvalue;
1062 return TRUE;
1063 }
1064 }
1065
1066 /******************************************************************
1067 * dwarf2_read_one_debug_info
1068 *
1069 * Loads into memory one debug info entry, and recursively its children (if any)
1070 */
1071 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
1072 dwarf2_traverse_context_t* traverse,
1073 dwarf2_debug_info_t* parent_di,
1074 dwarf2_debug_info_t** pdi)
1075 {
1076 const dwarf2_abbrev_entry_t*abbrev;
1077 unsigned long entry_code;
1078 unsigned long offset;
1079 dwarf2_debug_info_t* di;
1080 dwarf2_debug_info_t* child;
1081 dwarf2_debug_info_t** where;
1082 dwarf2_abbrev_entry_attr_t* attr;
1083 unsigned i;
1084 struct attribute sibling;
1085
1086 offset = traverse->data - ctx->sections[ctx->section].address;
1087 entry_code = dwarf2_leb128_as_unsigned(traverse);
1088 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
1089 if (!entry_code)
1090 {
1091 *pdi = NULL;
1092 return TRUE;
1093 }
1094 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
1095 if (!abbrev)
1096 {
1097 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
1098 return FALSE;
1099 }
1100 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
1101 if (!di) return FALSE;
1102 di->abbrev = abbrev;
1103 di->symt = NULL;
1104 di->parent = parent_di;
1105
1106 if (abbrev->num_attr)
1107 {
1108 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
1109 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
1110 {
1111 di->data[i] = traverse->data;
1112 dwarf2_swallow_attribute(traverse, attr);
1113 }
1114 }
1115 else di->data = NULL;
1116 if (abbrev->have_child)
1117 {
1118 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
1119 while (traverse->data < traverse->end_data)
1120 {
1121 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE;
1122 if (!child) break;
1123 where = vector_add(&di->children, &ctx->pool);
1124 if (!where) return FALSE;
1125 *where = child;
1126 }
1127 }
1128 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1129 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1130 {
1131 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1132 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1133 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1134 }
1135 *pdi = di;
1136 return TRUE;
1137 }
1138
1139 static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx,
1140 dwarf2_debug_info_t* di)
1141 {
1142 struct attribute spec;
1143
1144 while (di)
1145 {
1146 if (di->abbrev->have_child)
1147 return &di->children;
1148 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break;
1149 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue)))
1150 FIXME("Should have found the debug info entry\n");
1151 }
1152 return NULL;
1153 }
1154
1155 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1156 dwarf2_debug_info_t* di)
1157 {
1158 struct attribute name;
1159 struct attribute size;
1160 struct attribute encoding;
1161 enum BasicType bt;
1162 int cache_idx = -1;
1163 if (di->symt) return di->symt;
1164
1165 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1166
1167 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1168 name.u.string = NULL;
1169 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1170 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1171
1172 switch (encoding.u.uvalue)
1173 {
1174 case DW_ATE_void: bt = btVoid; break;
1175 case DW_ATE_address: bt = btULong; break;
1176 case DW_ATE_boolean: bt = btBool; break;
1177 case DW_ATE_complex_float: bt = btComplex; break;
1178 case DW_ATE_float: bt = btFloat; break;
1179 case DW_ATE_signed: bt = btInt; break;
1180 case DW_ATE_unsigned: bt = btUInt; break;
1181 case DW_ATE_signed_char: bt = btChar; break;
1182 case DW_ATE_unsigned_char: bt = btChar; break;
1183 default: bt = btNoType; break;
1184 }
1185 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1186 switch (bt)
1187 {
1188 case btVoid:
1189 assert(size.u.uvalue == 0);
1190 cache_idx = sc_void;
1191 break;
1192 case btInt:
1193 switch (size.u.uvalue)
1194 {
1195 case 1: cache_idx = sc_int1; break;
1196 case 2: cache_idx = sc_int2; break;
1197 case 4: cache_idx = sc_int4; break;
1198 }
1199 break;
1200 default: break;
1201 }
1202 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1203 ctx->symt_cache[cache_idx] = di->symt;
1204
1205 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1206 return di->symt;
1207 }
1208
1209 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1210 dwarf2_debug_info_t* di)
1211 {
1212 struct symt* ref_type;
1213 struct attribute name;
1214
1215 if (di->symt) return di->symt;
1216
1217 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1218
1219 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1220 ref_type = dwarf2_lookup_type(ctx, di);
1221
1222 if (name.u.string)
1223 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1224 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1225 return di->symt;
1226 }
1227
1228 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1229 dwarf2_debug_info_t* di)
1230 {
1231 struct symt* ref_type;
1232 struct attribute size;
1233
1234 if (di->symt) return di->symt;
1235
1236 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1237
1238 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
1239 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1240 {
1241 ref_type = ctx->symt_cache[sc_void];
1242 assert(ref_type);
1243 }
1244 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
1245 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1246 return di->symt;
1247 }
1248
1249 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1250 dwarf2_debug_info_t* di)
1251 {
1252 struct symt* ref_type;
1253 struct symt* idx_type = NULL;
1254 struct attribute min, max, cnt;
1255 dwarf2_debug_info_t* child;
1256 unsigned int i;
1257 const struct vector* children;
1258
1259 if (di->symt) return di->symt;
1260
1261 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1262
1263 ref_type = dwarf2_lookup_type(ctx, di);
1264
1265 if (!(children = dwarf2_get_di_children(ctx, di)))
1266 {
1267 /* fake an array with unknown size */
1268 /* FIXME: int4 even on 64bit machines??? */
1269 idx_type = ctx->symt_cache[sc_int4];
1270 min.u.uvalue = 0;
1271 max.u.uvalue = -1;
1272 }
1273 else for (i = 0; i < vector_length(children); i++)
1274 {
1275 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1276 switch (child->abbrev->tag)
1277 {
1278 case DW_TAG_subrange_type:
1279 idx_type = dwarf2_lookup_type(ctx, child);
1280 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1281 min.u.uvalue = 0;
1282 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1283 max.u.uvalue = 0;
1284 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1285 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1286 break;
1287 default:
1288 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1289 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1290 break;
1291 }
1292 }
1293 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1294 return di->symt;
1295 }
1296
1297 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1298 dwarf2_debug_info_t* di)
1299 {
1300 struct symt* ref_type;
1301
1302 if (di->symt) return di->symt;
1303
1304 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1305
1306 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1307 {
1308 ref_type = ctx->symt_cache[sc_void];
1309 assert(ref_type);
1310 }
1311 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1312 di->symt = ref_type;
1313
1314 return ref_type;
1315 }
1316
1317 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1318 dwarf2_debug_info_t* di)
1319 {
1320 struct symt* ref_type;
1321
1322 if (di->symt) return di->symt;
1323
1324 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1325
1326 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1327 {
1328 ref_type = ctx->symt_cache[sc_void];
1329 assert(ref_type);
1330 }
1331 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1332 di->symt = ref_type;
1333
1334 return ref_type;
1335 }
1336
1337 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1338 dwarf2_debug_info_t* di)
1339 {
1340 struct symt* ref_type = NULL;
1341
1342 if (di->symt) return di->symt;
1343
1344 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1345
1346 ref_type = dwarf2_lookup_type(ctx, di);
1347 /* FIXME: for now, we hard-wire C++ references to pointers */
1348 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
1349
1350 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1351
1352 return di->symt;
1353 }
1354
1355 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1356 dwarf2_debug_info_t* di,
1357 struct symt_udt* parent)
1358 {
1359 struct symt* elt_type;
1360 struct attribute name;
1361 struct attribute bit_size;
1362 struct attribute bit_offset;
1363 struct location loc;
1364
1365 assert(parent);
1366
1367 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1368
1369 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1370 elt_type = dwarf2_lookup_type(ctx, di);
1371 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1372 {
1373 if (loc.kind != loc_absolute)
1374 {
1375 FIXME("Found register, while not expecting it\n");
1376 loc.offset = 0;
1377 }
1378 else
1379 TRACE("found member_location at %s -> %lu\n",
1380 dwarf2_debug_ctx(ctx), loc.offset);
1381 }
1382 else
1383 loc.offset = 0;
1384 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1385 bit_size.u.uvalue = 0;
1386 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1387 {
1388 /* FIXME: we should only do this when implementation is LSB (which is
1389 * the case on i386 processors)
1390 */
1391 struct attribute nbytes;
1392 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1393 {
1394 DWORD64 size;
1395 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1396 (unsigned long)size : 0;
1397 }
1398 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1399 }
1400 else bit_offset.u.uvalue = 0;
1401 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1402 (loc.offset << 3) + bit_offset.u.uvalue,
1403 bit_size.u.uvalue);
1404
1405 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1406 }
1407
1408 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1409 dwarf2_debug_info_t* di);
1410
1411 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1412 dwarf2_debug_info_t* di,
1413 enum UdtKind udt)
1414 {
1415 struct attribute name;
1416 struct attribute size;
1417 struct vector* children;
1418 dwarf2_debug_info_t*child;
1419 unsigned int i;
1420
1421 if (di->symt) return di->symt;
1422
1423 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1424
1425 /* quirk... FIXME provide real support for anonymous UDTs */
1426 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1427 name.u.string = "zz_anon_zz";
1428 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1429
1430 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string),
1431 size.u.uvalue, udt)->symt;
1432
1433 children = dwarf2_get_di_children(ctx, di);
1434 if (children) for (i = 0; i < vector_length(children); i++)
1435 {
1436 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1437
1438 switch (child->abbrev->tag)
1439 {
1440 case DW_TAG_member:
1441 /* FIXME: should I follow the sibling stuff ?? */
1442 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1443 break;
1444 case DW_TAG_enumeration_type:
1445 dwarf2_parse_enumeration_type(ctx, child);
1446 break;
1447 case DW_TAG_subprogram:
1448 dwarf2_parse_subprogram(ctx, child);
1449 break;
1450 case DW_TAG_structure_type:
1451 case DW_TAG_class_type:
1452 case DW_TAG_union_type:
1453 case DW_TAG_typedef:
1454 /* FIXME: we need to handle nested udt definitions */
1455 case DW_TAG_inheritance:
1456 case DW_TAG_template_type_param:
1457 case DW_TAG_template_value_param:
1458 case DW_TAG_variable:
1459 case DW_TAG_imported_declaration:
1460 case DW_TAG_ptr_to_member_type:
1461 /* FIXME: some C++ related stuff */
1462 break;
1463 default:
1464 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1465 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1466 break;
1467 }
1468 }
1469
1470 return di->symt;
1471 }
1472
1473 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1474 dwarf2_debug_info_t* di,
1475 struct symt_enum* parent)
1476 {
1477 struct attribute name;
1478 struct attribute value;
1479
1480 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1481
1482 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1483 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1484 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1485
1486 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1487 }
1488
1489 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1490 dwarf2_debug_info_t* di)
1491 {
1492 struct attribute name;
1493 struct attribute size;
1494 struct symt_basic* basetype;
1495 struct vector* children;
1496 dwarf2_debug_info_t*child;
1497 unsigned int i;
1498
1499 if (di->symt) return di->symt;
1500
1501 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1502
1503 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1504 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1505
1506 switch (size.u.uvalue) /* FIXME: that's wrong */
1507 {
1508 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1509 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1510 default:
1511 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1512 }
1513
1514 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1515
1516 children = dwarf2_get_di_children(ctx, di);
1517 /* FIXME: should we use the sibling stuff ?? */
1518 if (children) for (i = 0; i < vector_length(children); i++)
1519 {
1520 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1521
1522 switch (child->abbrev->tag)
1523 {
1524 case DW_TAG_enumerator:
1525 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1526 break;
1527 default:
1528 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1529 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1530 }
1531 }
1532 return di->symt;
1533 }
1534
1535 /* structure used to pass information around when parsing a subprogram */
1536 typedef struct dwarf2_subprogram_s
1537 {
1538 dwarf2_parse_context_t* ctx;
1539 struct symt_function* func;
1540 BOOL non_computed_variable;
1541 struct location frame;
1542 } dwarf2_subprogram_t;
1543
1544 /******************************************************************
1545 * dwarf2_parse_variable
1546 *
1547 * Parses any variable (parameter, local/global variable)
1548 */
1549 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1550 struct symt_block* block,
1551 dwarf2_debug_info_t* di)
1552 {
1553 struct symt* param_type;
1554 struct attribute name, value;
1555 struct location loc;
1556 BOOL is_pmt;
1557
1558 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1559
1560 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1561 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1562
1563 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1564 /* cannot do much without the name, the functions below won't like it. */
1565 return;
1566 }
1567 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1568 &loc, &subpgm->frame))
1569 {
1570 struct attribute ext;
1571
1572 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1573 name.u.string, loc.kind, loc.offset, loc.reg,
1574 dwarf2_debug_ctx(subpgm->ctx));
1575
1576 switch (loc.kind)
1577 {
1578 case loc_error:
1579 break;
1580 case loc_absolute:
1581 /* it's a global variable */
1582 /* FIXME: we don't handle its scope yet */
1583 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1584 ext.u.uvalue = 0;
1585 loc.offset += subpgm->ctx->load_offset;
1586 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland,
1587 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue,
1588 loc, 0, param_type);
1589 break;
1590 default:
1591 subpgm->non_computed_variable = TRUE;
1592 /* fall through */
1593 case loc_register:
1594 case loc_regrel:
1595 /* either a pmt/variable relative to frame pointer or
1596 * pmt/variable in a register
1597 */
1598 assert(subpgm->func);
1599 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1600 is_pmt ? DataIsParam : DataIsLocal,
1601 &loc, block, param_type, name.u.string);
1602 break;
1603 }
1604 }
1605 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1606 {
1607 VARIANT v;
1608 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1609 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1610 switch (value.form)
1611 {
1612 case DW_FORM_data1:
1613 case DW_FORM_data2:
1614 case DW_FORM_data4:
1615 case DW_FORM_udata:
1616 case DW_FORM_addr:
1617 v.n1.n2.vt = VT_UI4;
1618 v.n1.n2.n3.lVal = value.u.uvalue;
1619 break;
1620
1621 case DW_FORM_data8:
1622 v.n1.n2.vt = VT_UI8;
1623 v.n1.n2.n3.llVal = value.u.lluvalue;
1624 break;
1625
1626 case DW_FORM_sdata:
1627 v.n1.n2.vt = VT_I4;
1628 v.n1.n2.n3.lVal = value.u.svalue;
1629 break;
1630
1631 case DW_FORM_strp:
1632 case DW_FORM_string:
1633 /* FIXME: native doesn't report const strings from here !!
1634 * however, the value of the string is in the code somewhere
1635 */
1636 v.n1.n2.vt = VT_I1 | VT_BYREF;
1637 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1638 break;
1639
1640 case DW_FORM_block:
1641 case DW_FORM_block1:
1642 case DW_FORM_block2:
1643 case DW_FORM_block4:
1644 v.n1.n2.vt = VT_I4;
1645 switch (value.u.block.size)
1646 {
1647 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1648 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1649 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1650 default:
1651 v.n1.n2.vt = VT_I1 | VT_BYREF;
1652 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1653 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1654 }
1655 break;
1656
1657 default:
1658 FIXME("Unsupported form for const value %s (%lx)\n",
1659 name.u.string, value.form);
1660 v.n1.n2.vt = VT_EMPTY;
1661 }
1662 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland,
1663 name.u.string, param_type, &v)->symt;
1664 }
1665 else
1666 {
1667 /* variable has been optimized away... report anyway */
1668 loc.kind = loc_error;
1669 loc.reg = loc_err_no_location;
1670 if (subpgm->func)
1671 {
1672 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1673 is_pmt ? DataIsParam : DataIsLocal,
1674 &loc, block, param_type, name.u.string);
1675 }
1676 else
1677 {
1678 WARN("dropping global variable %s which has been optimized away\n", name.u.string);
1679 }
1680 }
1681 if (is_pmt && subpgm->func && subpgm->func->type)
1682 symt_add_function_signature_parameter(subpgm->ctx->module,
1683 (struct symt_function_signature*)subpgm->func->type,
1684 param_type);
1685
1686 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n");
1687 }
1688
1689 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1690 const dwarf2_debug_info_t* di)
1691 {
1692 struct attribute name;
1693 struct attribute low_pc;
1694 struct location loc;
1695
1696 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1697
1698 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1699 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1700 name.u.string = NULL;
1701
1702 loc.kind = loc_absolute;
1703 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1704 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1705 &loc, name.u.string);
1706 }
1707
1708 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1709 struct symt_block* parent_block,
1710 dwarf2_debug_info_t* di);
1711
1712 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1713 struct symt_block* parent_block,
1714 dwarf2_debug_info_t* di)
1715 {
1716 struct symt_block* block;
1717 unsigned long low_pc, high_pc;
1718 struct vector* children;
1719 dwarf2_debug_info_t*child;
1720 unsigned int i;
1721
1722 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1723
1724 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1725 {
1726 FIXME("cannot read range\n");
1727 return;
1728 }
1729
1730 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1731 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1732 high_pc - low_pc);
1733
1734 children = dwarf2_get_di_children(subpgm->ctx, di);
1735 if (children) for (i = 0; i < vector_length(children); i++)
1736 {
1737 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1738
1739 switch (child->abbrev->tag)
1740 {
1741 case DW_TAG_formal_parameter:
1742 case DW_TAG_variable:
1743 dwarf2_parse_variable(subpgm, block, child);
1744 break;
1745 case DW_TAG_lexical_block:
1746 dwarf2_parse_subprogram_block(subpgm, block, child);
1747 break;
1748 case DW_TAG_inlined_subroutine:
1749 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1750 break;
1751 case DW_TAG_label:
1752 dwarf2_parse_subprogram_label(subpgm, child);
1753 break;
1754 case DW_TAG_GNU_call_site:
1755 /* this isn't properly supported by dbghelp interface. skip it for now */
1756 break;
1757 default:
1758 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1759 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1760 dwarf2_debug_di(di));
1761 }
1762 }
1763 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1764 }
1765
1766 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1767 struct symt_block* parent_block,
1768 dwarf2_debug_info_t* di)
1769 {
1770 struct symt_block* block;
1771 unsigned long low_pc, high_pc;
1772 struct vector* children;
1773 dwarf2_debug_info_t*child;
1774 unsigned int i;
1775
1776 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1777
1778 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1779 {
1780 FIXME("no range\n");
1781 return;
1782 }
1783
1784 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1785 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1786 high_pc - low_pc);
1787
1788 children = dwarf2_get_di_children(subpgm->ctx, di);
1789 if (children) for (i = 0; i < vector_length(children); i++)
1790 {
1791 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1792
1793 switch (child->abbrev->tag)
1794 {
1795 case DW_TAG_inlined_subroutine:
1796 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1797 break;
1798 case DW_TAG_variable:
1799 dwarf2_parse_variable(subpgm, block, child);
1800 break;
1801 case DW_TAG_lexical_block:
1802 dwarf2_parse_subprogram_block(subpgm, block, child);
1803 break;
1804 case DW_TAG_subprogram:
1805 /* FIXME: likely a declaration (to be checked)
1806 * skip it for now
1807 */
1808 break;
1809 case DW_TAG_formal_parameter:
1810 /* FIXME: likely elements for exception handling (GCC flavor)
1811 * Skip it for now
1812 */
1813 break;
1814 case DW_TAG_imported_module:
1815 /* C++ stuff to be silenced (for now) */
1816 break;
1817 case DW_TAG_GNU_call_site:
1818 /* this isn't properly supported by dbghelp interface. skip it for now */
1819 break;
1820 case DW_TAG_label:
1821 dwarf2_parse_subprogram_label(subpgm, child);
1822 break;
1823 case DW_TAG_class_type:
1824 case DW_TAG_structure_type:
1825 case DW_TAG_union_type:
1826 case DW_TAG_enumeration_type:
1827 case DW_TAG_typedef:
1828 /* the type referred to will be loaded when we need it, so skip it */
1829 break;
1830 default:
1831 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1832 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1833 }
1834 }
1835
1836 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1837 }
1838
1839 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1840 dwarf2_debug_info_t* di)
1841 {
1842 struct attribute name;
1843 unsigned long low_pc, high_pc;
1844 struct attribute is_decl;
1845 struct attribute inline_flags;
1846 struct symt* ret_type;
1847 struct symt_function_signature* sig_type;
1848 dwarf2_subprogram_t subpgm;
1849 struct vector* children;
1850 dwarf2_debug_info_t* child;
1851 unsigned int i;
1852
1853 if (di->symt) return di->symt;
1854
1855 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1856
1857 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1858 {
1859 WARN("No name for function... dropping function\n");
1860 return NULL;
1861 }
1862 /* if it's an abstract representation of an inline function, there should be
1863 * a concrete object that we'll handle
1864 */
1865 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) &&
1866 inline_flags.u.uvalue != DW_INL_not_inlined)
1867 {
1868 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1869 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1870 return NULL;
1871 }
1872
1873 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) &&
1874 is_decl.u.uvalue && is_decl.gotten_from == attr_direct)
1875 {
1876 /* it's a real declaration, skip it */
1877 return NULL;
1878 }
1879 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
1880 {
1881 WARN("cannot get range for %s\n", name.u.string);
1882 return NULL;
1883 }
1884 /* As functions (defined as inline assembly) get debug info with dwarf
1885 * (not the case for stabs), we just drop Wine's thunks here...
1886 * Actual thunks will be created in elf_module from the symbol table
1887 */
1888 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
1889 return NULL;
1890 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1891 {
1892 ret_type = ctx->symt_cache[sc_void];
1893 assert(ret_type);
1894 }
1895 /* FIXME: assuming C source code */
1896 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1897 subpgm.func = symt_new_function(ctx->module, ctx->compiland,
1898 dwarf2_get_cpp_name(ctx, di, name.u.string),
1899 ctx->load_offset + low_pc, high_pc - low_pc,
1900 &sig_type->symt);
1901 di->symt = &subpgm.func->symt;
1902 subpgm.ctx = ctx;
1903 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1904 &subpgm.frame, NULL))
1905 {
1906 /* on stack !! */
1907 subpgm.frame.kind = loc_regrel;
1908 subpgm.frame.reg = dbghelp_current_cpu->frame_regno;
1909 subpgm.frame.offset = 0;
1910 }
1911 subpgm.non_computed_variable = FALSE;
1912
1913 children = dwarf2_get_di_children(ctx, di);
1914 if (children) for (i = 0; i < vector_length(children); i++)
1915 {
1916 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1917
1918 switch (child->abbrev->tag)
1919 {
1920 case DW_TAG_variable:
1921 case DW_TAG_formal_parameter:
1922 dwarf2_parse_variable(&subpgm, NULL, child);
1923 break;
1924 case DW_TAG_lexical_block:
1925 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1926 break;
1927 case DW_TAG_inlined_subroutine:
1928 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1929 break;
1930 case DW_TAG_subprogram:
1931 /* FIXME: likely a declaration (to be checked)
1932 * skip it for now
1933 */
1934 break;
1935 case DW_TAG_label:
1936 dwarf2_parse_subprogram_label(&subpgm, child);
1937 break;
1938 case DW_TAG_class_type:
1939 case DW_TAG_structure_type:
1940 case DW_TAG_union_type:
1941 case DW_TAG_enumeration_type:
1942 case DW_TAG_typedef:
1943 /* the type referred to will be loaded when we need it, so skip it */
1944 break;
1945 case DW_TAG_unspecified_parameters:
1946 case DW_TAG_template_type_param:
1947 case DW_TAG_template_value_param:
1948 case DW_TAG_GNU_call_site:
1949 /* FIXME: no support in dbghelp's internals so far */
1950 break;
1951 default:
1952 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1953 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1954 }
1955 }
1956
1957 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1958 {
1959 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1960 &subpgm.frame, NULL);
1961 }
1962 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1963
1964 return di->symt;
1965 }
1966
1967 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1968 dwarf2_debug_info_t* di)
1969 {
1970 struct symt* ret_type;
1971 struct symt_function_signature* sig_type;
1972 struct vector* children;
1973 dwarf2_debug_info_t* child;
1974 unsigned int i;
1975
1976 if (di->symt) return di->symt;
1977
1978 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1979
1980 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1981 {
1982 ret_type = ctx->symt_cache[sc_void];
1983 assert(ret_type);
1984 }
1985
1986 /* FIXME: assuming C source code */
1987 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1988
1989 children = dwarf2_get_di_children(ctx, di);
1990 if (children) for (i = 0; i < vector_length(children); i++)
1991 {
1992 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1993
1994 switch (child->abbrev->tag)
1995 {
1996 case DW_TAG_formal_parameter:
1997 symt_add_function_signature_parameter(ctx->module, sig_type,
1998 dwarf2_lookup_type(ctx, child));
1999 break;
2000 case DW_TAG_unspecified_parameters:
2001 WARN("Unsupported unspecified parameters\n");
2002 break;
2003 }
2004 }
2005
2006 return di->symt = &sig_type->symt;
2007 }
2008
2009 static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx,
2010 dwarf2_debug_info_t* di)
2011 {
2012 struct vector* children;
2013 dwarf2_debug_info_t* child;
2014 unsigned int i;
2015
2016 if (di->symt) return;
2017
2018 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2019
2020 di->symt = ctx->symt_cache[sc_void];
2021
2022 children = dwarf2_get_di_children(ctx, di);
2023 if (children) for (i = 0; i < vector_length(children); i++)
2024 {
2025 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2026 dwarf2_load_one_entry(ctx, child);
2027 }
2028 }
2029
2030 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
2031 dwarf2_debug_info_t* di)
2032 {
2033 switch (di->abbrev->tag)
2034 {
2035 case DW_TAG_typedef:
2036 dwarf2_parse_typedef(ctx, di);
2037 break;
2038 case DW_TAG_base_type:
2039 dwarf2_parse_base_type(ctx, di);
2040 break;
2041 case DW_TAG_pointer_type:
2042 dwarf2_parse_pointer_type(ctx, di);
2043 break;
2044 case DW_TAG_class_type:
2045 dwarf2_parse_udt_type(ctx, di, UdtClass);
2046 break;
2047 case DW_TAG_structure_type:
2048 dwarf2_parse_udt_type(ctx, di, UdtStruct);
2049 break;
2050 case DW_TAG_union_type:
2051 dwarf2_parse_udt_type(ctx, di, UdtUnion);
2052 break;
2053 case DW_TAG_array_type:
2054 dwarf2_parse_array_type(ctx, di);
2055 break;
2056 case DW_TAG_const_type:
2057 dwarf2_parse_const_type(ctx, di);
2058 break;
2059 case DW_TAG_volatile_type:
2060 dwarf2_parse_volatile_type(ctx, di);
2061 break;
2062 case DW_TAG_reference_type:
2063 dwarf2_parse_reference_type(ctx, di);
2064 break;
2065 case DW_TAG_enumeration_type:
2066 dwarf2_parse_enumeration_type(ctx, di);
2067 break;
2068 case DW_TAG_subprogram:
2069 dwarf2_parse_subprogram(ctx, di);
2070 break;
2071 case DW_TAG_subroutine_type:
2072 dwarf2_parse_subroutine_type(ctx, di);
2073 break;
2074 case DW_TAG_variable:
2075 {
2076 dwarf2_subprogram_t subpgm;
2077
2078 subpgm.ctx = ctx;
2079 subpgm.func = NULL;
2080 subpgm.frame.kind = loc_absolute;
2081 subpgm.frame.offset = 0;
2082 subpgm.frame.reg = Wine_DW_no_register;
2083 dwarf2_parse_variable(&subpgm, NULL, di);
2084 }
2085 break;
2086 case DW_TAG_namespace:
2087 dwarf2_parse_namespace(ctx, di);
2088 break;
2089 /* silence a couple of C++ defines */
2090 case DW_TAG_imported_module:
2091 case DW_TAG_imported_declaration:
2092 case DW_TAG_ptr_to_member_type:
2093 break;
2094 default:
2095 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
2096 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
2097 }
2098 }
2099
2100 static void dwarf2_set_line_number(struct module* module, unsigned long address,
2101 const struct vector* v, unsigned file, unsigned line)
2102 {
2103 struct symt_function* func;
2104 struct symt_ht* symt;
2105 unsigned* psrc;
2106
2107 if (!file || !(psrc = vector_at(v, file - 1))) return;
2108
2109 TRACE("%s %lx %s %u\n",
2110 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
2111 if (!(symt = symt_find_nearest(module, address)) ||
2112 symt->symt.tag != SymTagFunction) return;
2113 func = (struct symt_function*)symt;
2114 symt_add_func_line(module, func, *psrc, line, address - func->address);
2115 }
2116
2117 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
2118 dwarf2_parse_context_t* ctx,
2119 const char* compile_dir,
2120 unsigned long offset)
2121 {
2122 dwarf2_traverse_context_t traverse;
2123 unsigned long length;
2124 unsigned insn_size, default_stmt;
2125 unsigned line_range, opcode_base;
2126 int line_base;
2127 const unsigned char* opcode_len;
2128 struct vector dirs;
2129 struct vector files;
2130 const char** p;
2131
2132 /* section with line numbers stripped */
2133 if (sections[section_line].address == IMAGE_NO_MAP)
2134 return FALSE;
2135
2136 if (offset + 4 > sections[section_line].size)
2137 {
2138 WARN("out of bounds offset\n");
2139 return FALSE;
2140 }
2141 traverse.data = sections[section_line].address + offset;
2142 traverse.end_data = traverse.data + 4;
2143 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2144
2145 length = dwarf2_parse_u4(&traverse);
2146 traverse.end_data = sections[section_line].address + offset + length;
2147
2148 if (offset + 4 + length > sections[section_line].size)
2149 {
2150 WARN("out of bounds header\n");
2151 return FALSE;
2152 }
2153 dwarf2_parse_u2(&traverse); /* version */
2154 dwarf2_parse_u4(&traverse); /* header_len */
2155 insn_size = dwarf2_parse_byte(&traverse);
2156 default_stmt = dwarf2_parse_byte(&traverse);
2157 line_base = (signed char)dwarf2_parse_byte(&traverse);
2158 line_range = dwarf2_parse_byte(&traverse);
2159 opcode_base = dwarf2_parse_byte(&traverse);
2160
2161 opcode_len = traverse.data;
2162 traverse.data += opcode_base - 1;
2163
2164 vector_init(&dirs, sizeof(const char*), 4);
2165 p = vector_add(&dirs, &ctx->pool);
2166 *p = compile_dir ? compile_dir : ".";
2167 while (*traverse.data)
2168 {
2169 const char* rel = (const char*)traverse.data;
2170 unsigned rellen = strlen(rel);
2171 TRACE("Got include %s\n", rel);
2172 traverse.data += rellen + 1;
2173 p = vector_add(&dirs, &ctx->pool);
2174
2175 if (*rel == '/' || !compile_dir)
2176 *p = rel;
2177 else
2178 {
2179 /* include directory relative to compile directory */
2180 unsigned baselen = strlen(compile_dir);
2181 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
2182 strcpy(tmp, compile_dir);
2183 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2184 strcpy(&tmp[baselen], rel);
2185 *p = tmp;
2186 }
2187
2188 }
2189 traverse.data++;
2190
2191 vector_init(&files, sizeof(unsigned), 16);
2192 while (*traverse.data)
2193 {
2194 unsigned int dir_index, mod_time, length;
2195 const char* name;
2196 const char* dir;
2197 unsigned* psrc;
2198
2199 name = (const char*)traverse.data;
2200 traverse.data += strlen(name) + 1;
2201 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2202 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2203 length = dwarf2_leb128_as_unsigned(&traverse);
2204 dir = *(const char**)vector_at(&dirs, dir_index);
2205 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
2206 psrc = vector_add(&files, &ctx->pool);
2207 *psrc = source_new(ctx->module, dir, name);
2208 }
2209 traverse.data++;
2210
2211 while (traverse.data < traverse.end_data)
2212 {
2213 unsigned long address = 0;
2214 unsigned file = 1;
2215 unsigned line = 1;
2216 unsigned is_stmt = default_stmt;
2217 BOOL end_sequence = FALSE;
2218 unsigned opcode, extopcode, i;
2219
2220 while (!end_sequence)
2221 {
2222 opcode = dwarf2_parse_byte(&traverse);
2223 TRACE("Got opcode %x\n", opcode);
2224
2225 if (opcode >= opcode_base)
2226 {
2227 unsigned delta = opcode - opcode_base;
2228
2229 address += (delta / line_range) * insn_size;
2230 line += line_base + (delta % line_range);
2231 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2232 }
2233 else
2234 {
2235 switch (opcode)
2236 {
2237 case DW_LNS_copy:
2238 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2239 break;
2240 case DW_LNS_advance_pc:
2241 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2242 break;
2243 case DW_LNS_advance_line:
2244 line += dwarf2_leb128_as_signed(&traverse);
2245 break;
2246 case DW_LNS_set_file:
2247 file = dwarf2_leb128_as_unsigned(&traverse);
2248 break;
2249 case DW_LNS_set_column:
2250 dwarf2_leb128_as_unsigned(&traverse);
2251 break;
2252 case DW_LNS_negate_stmt:
2253 is_stmt = !is_stmt;
2254 break;
2255 case DW_LNS_set_basic_block:
2256 break;
2257 case DW_LNS_const_add_pc:
2258 address += ((255 - opcode_base) / line_range) * insn_size;
2259 break;
2260 case DW_LNS_fixed_advance_pc:
2261 address += dwarf2_parse_u2(&traverse);
2262 break;
2263 case DW_LNS_extended_op:
2264 dwarf2_leb128_as_unsigned(&traverse);
2265 extopcode = dwarf2_parse_byte(&traverse);
2266 switch (extopcode)
2267 {
2268 case DW_LNE_end_sequence:
2269 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2270 end_sequence = TRUE;
2271 break;
2272 case DW_LNE_set_address:
2273 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2274 break;
2275 case DW_LNE_define_file:
2276 FIXME("not handled %s\n", traverse.data);
2277 traverse.data += strlen((const char *)traverse.data) + 1;
2278 dwarf2_leb128_as_unsigned(&traverse);
2279 dwarf2_leb128_as_unsigned(&traverse);
2280 dwarf2_leb128_as_unsigned(&traverse);
2281 break;
2282 case DW_LNE_set_discriminator:
2283 WARN("not handled %s\n", traverse.data);
2284 dwarf2_leb128_as_unsigned(&traverse);
2285 break;
2286 default:
2287 FIXME("Unsupported extended opcode %x\n", extopcode);
2288 break;
2289 }
2290 break;
2291 default:
2292 WARN("Unsupported opcode %x\n", opcode);
2293 for (i = 0; i < opcode_len[opcode]; i++)
2294 dwarf2_leb128_as_unsigned(&traverse);
2295 break;
2296 }
2297 }
2298 }
2299 }
2300 return TRUE;
2301 }
2302
2303 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2304 struct module* module,
2305 const struct elf_thunk_area* thunks,
2306 dwarf2_traverse_context_t* mod_ctx,
2307 unsigned long load_offset)
2308 {
2309 dwarf2_parse_context_t ctx;
2310 dwarf2_traverse_context_t abbrev_ctx;
2311 dwarf2_debug_info_t* di;
2312 dwarf2_traverse_context_t cu_ctx;
2313 const unsigned char* comp_unit_start = mod_ctx->data;
2314 unsigned long cu_length;
2315 unsigned short cu_version;
2316 unsigned long cu_abbrev_offset;
2317 BOOL ret = FALSE;
2318
2319 cu_length = dwarf2_parse_u4(mod_ctx);
2320 cu_ctx.data = mod_ctx->data;
2321 cu_ctx.end_data = mod_ctx->data + cu_length;
2322 mod_ctx->data += cu_length;
2323 cu_version = dwarf2_parse_u2(&cu_ctx);
2324 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2325 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2326
2327 TRACE("Compilation Unit Header found at 0x%x:\n",
2328 (int)(comp_unit_start - sections[section_debug].address));
2329 TRACE("- length: %lu\n", cu_length);
2330 TRACE("- version: %u\n", cu_version);
2331 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2332 TRACE("- word_size: %u\n", cu_ctx.word_size);
2333
2334 if (cu_version != 2)
2335 {
2336 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2337 cu_version);
2338 return FALSE;
2339 }
2340
2341 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2342 mod_ctx->word_size = cu_ctx.word_size;
2343
2344 pool_init(&ctx.pool, 65536);
2345 ctx.sections = sections;
2346 ctx.section = section_debug;
2347 ctx.module = module;
2348 ctx.thunks = thunks;
2349 ctx.load_offset = load_offset;
2350 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2351 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2352 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2353 ctx.cpp_name = NULL;
2354
2355 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2356 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2357 abbrev_ctx.word_size = cu_ctx.word_size;
2358 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2359
2360 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2361 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di);
2362
2363 if (di->abbrev->tag == DW_TAG_compile_unit)
2364 {
2365 struct attribute name;
2366 struct vector* children;
2367 dwarf2_debug_info_t* child = NULL;
2368 unsigned int i;
2369 struct attribute stmt_list, low_pc;
2370 struct attribute comp_dir;
2371
2372 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2373 name.u.string = NULL;
2374
2375 /* get working directory of current compilation unit */
2376 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2377 comp_dir.u.string = NULL;
2378
2379 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2380 low_pc.u.uvalue = 0;
2381 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue,
2382 source_new(module, comp_dir.u.string, name.u.string));
2383 di->symt = &ctx.compiland->symt;
2384 children = dwarf2_get_di_children(&ctx, di);
2385 if (children) for (i = 0; i < vector_length(children); i++)
2386 {
2387 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2388 dwarf2_load_one_entry(&ctx, child);
2389 }
2390 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2391 {
2392 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2393 module->module.LineNumbers = TRUE;
2394 }
2395 ret = TRUE;
2396 }
2397 else FIXME("Should have a compilation unit here\n");
2398 pool_destroy(&ctx.pool);
2399 return ret;
2400 }
2401
2402 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2403 unsigned long ip, dwarf2_traverse_context_t* lctx)
2404 {
2405 DWORD_PTR beg, end;
2406 const BYTE* ptr = start;
2407 DWORD len;
2408
2409 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2410 {
2411 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2412 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2413 if (!beg && !end) break;
2414 len = dwarf2_get_u2(ptr); ptr += 2;
2415
2416 if (beg <= ip && ip < end)
2417 {
2418 lctx->data = ptr;
2419 lctx->end_data = ptr + len;
2420 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2421 return TRUE;
2422 }
2423 ptr += len;
2424 }
2425 WARN("Couldn't find ip in location list\n");
2426 return FALSE;
2427 }
2428
2429 static enum location_error loc_compute_frame(struct process* pcs,
2430 const struct module_format* modfmt,
2431 const struct symt_function* func,
2432 DWORD_PTR ip, struct location* frame)
2433 {
2434 struct symt** psym = NULL;
2435 struct location* pframe;
2436 dwarf2_traverse_context_t lctx;
2437 enum location_error err;
2438 unsigned int i;
2439
2440 for (i=0; i<vector_length(&func->vchildren); i++)
2441 {
2442 psym = vector_at(&func->vchildren, i);
2443 if ((*psym)->tag == SymTagCustom)
2444 {
2445 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2446
2447 /* First, recompute the frame information, if needed */
2448 switch (pframe->kind)
2449 {
2450 case loc_regrel:
2451 case loc_register:
2452 *frame = *pframe;
2453 break;
2454 case loc_dwarf2_location_list:
2455 WARN("Searching loclist for %s\n", func->hash_elt.name);
2456 if (!dwarf2_lookup_loclist(modfmt,
2457 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2458 ip, &lctx))
2459 return loc_err_out_of_scope;
2460 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2461 if (frame->kind >= loc_user)
2462 {
2463 WARN("Couldn't compute runtime frame location\n");
2464 return loc_err_too_complex;
2465 }
2466 break;
2467 default:
2468 WARN("Unsupported frame kind %d\n", pframe->kind);
2469 return loc_err_internal;
2470 }
2471 return 0;
2472 }
2473 }
2474 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2475 return loc_err_internal;
2476 }
2477
2478 enum reg_rule
2479 {
2480 RULE_UNSET, /* not set at all */
2481 RULE_UNDEFINED, /* undefined value */
2482 RULE_SAME, /* same value as previous frame */
2483 RULE_CFA_OFFSET, /* stored at cfa offset */
2484 RULE_OTHER_REG, /* stored in other register */
2485 RULE_EXPRESSION, /* address specified by expression */
2486 RULE_VAL_EXPRESSION /* value specified by expression */
2487 };
2488
2489 /* make it large enough for all CPUs */
2490 #define NB_FRAME_REGS 64
2491 #define MAX_SAVED_STATES 16
2492
2493 struct frame_state
2494 {
2495 ULONG_PTR cfa_offset;
2496 unsigned char cfa_reg;
2497 enum reg_rule cfa_rule;
2498 enum reg_rule rules[NB_FRAME_REGS];
2499 ULONG_PTR regs[NB_FRAME_REGS];
2500 };
2501
2502 struct frame_info
2503 {
2504 ULONG_PTR ip;
2505 ULONG_PTR code_align;
2506 LONG_PTR data_align;
2507 unsigned char retaddr_reg;
2508 unsigned char fde_encoding;
2509 unsigned char lsda_encoding;
2510 unsigned char signal_frame;
2511 unsigned char aug_z_format;
2512 unsigned char state_sp;
2513 struct frame_state state;
2514 struct frame_state state_stack[MAX_SAVED_STATES];
2515 };
2516
2517 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2518 {
2519 ULONG_PTR base;
2520
2521 if (encoding == DW_EH_PE_omit) return 0;
2522
2523 switch (encoding & 0xf0)
2524 {
2525 case DW_EH_PE_abs:
2526 base = 0;
2527 break;
2528 case DW_EH_PE_pcrel:
2529 base = (ULONG_PTR)ctx->data;
2530 break;
2531 default:
2532 FIXME("unsupported encoding %02x\n", encoding);
2533 return 0;
2534 }
2535
2536 switch (encoding & 0x0f)
2537 {
2538 case DW_EH_PE_native:
2539 return base + dwarf2_parse_addr(ctx);
2540 case DW_EH_PE_leb128:
2541 return base + dwarf2_leb128_as_unsigned(ctx);
2542 case DW_EH_PE_data2:
2543 return base + dwarf2_parse_u2(ctx);
2544 case DW_EH_PE_data4:
2545 return base + dwarf2_parse_u4(ctx);
2546 case DW_EH_PE_data8:
2547 return base + dwarf2_parse_u8(ctx);
2548 case DW_EH_PE_signed|DW_EH_PE_leb128:
2549 return base + dwarf2_leb128_as_signed(ctx);
2550 case DW_EH_PE_signed|DW_EH_PE_data2:
2551 return base + (signed short)dwarf2_parse_u2(ctx);
2552 case DW_EH_PE_signed|DW_EH_PE_data4:
2553 return base + (signed int)dwarf2_parse_u4(ctx);
2554 case DW_EH_PE_signed|DW_EH_PE_data8:
2555 return base + (LONG64)dwarf2_parse_u8(ctx);
2556 default:
2557 FIXME("unsupported encoding %02x\n", encoding);
2558 return 0;
2559 }
2560 }
2561
2562 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2563 {
2564 unsigned char version;
2565 const char* augmentation;
2566 const unsigned char* end;
2567 ULONG_PTR len;
2568
2569 memset(info, 0, sizeof(*info));
2570 info->lsda_encoding = DW_EH_PE_omit;
2571 info->aug_z_format = 0;
2572
2573 /* parse the CIE first */
2574 version = dwarf2_parse_byte(ctx);
2575 if (version != 1)
2576 {
2577 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2578 return FALSE;
2579 }
2580 augmentation = (const char*)ctx->data;
2581 ctx->data += strlen(augmentation) + 1;
2582
2583 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2584 info->data_align = dwarf2_leb128_as_signed(ctx);
2585 info->retaddr_reg = dwarf2_parse_byte(ctx);
2586 info->state.cfa_rule = RULE_CFA_OFFSET;
2587
2588 end = NULL;
2589 TRACE("\tparsing augmentation %s\n", augmentation);
2590 if (*augmentation) do
2591 {
2592 switch (*augmentation)
2593 {
2594 case 'z':
2595 len = dwarf2_leb128_as_unsigned(ctx);
2596 end = ctx->data + len;
2597 info->aug_z_format = 1;
2598 continue;
2599 case 'L':
2600 info->lsda_encoding = dwarf2_parse_byte(ctx);
2601 continue;
2602 case 'P':
2603 {
2604 unsigned char encoding = dwarf2_parse_byte(ctx);
2605 /* throw away the indirect bit, as we don't care for the result */
2606 encoding &= ~DW_EH_PE_indirect;
2607 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2608 continue;
2609 }
2610 case 'R':
2611 info->fde_encoding = dwarf2_parse_byte(ctx);
2612 continue;
2613 case 'S':
2614 info->signal_frame = 1;
2615 continue;
2616 }
2617 FIXME("unknown augmentation '%c'\n", *augmentation);
2618 if (!end) return FALSE;
2619 break;
2620 } while (*++augmentation);
2621 if (end) ctx->data = end;
2622 return TRUE;
2623 }
2624
2625 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2626 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2627 struct frame_info* info, BOOL in_eh_frame)
2628 {
2629 const unsigned char* ptr_blk;
2630 const unsigned char* cie_ptr;
2631 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2632 unsigned len, id;
2633 unsigned long start, range;
2634 unsigned cie_id;
2635 const BYTE* start_data = fde_ctx->data;
2636
2637 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2638 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2639 {
2640 /* find the FDE for address addr (skip CIE) */
2641 len = dwarf2_parse_u4(fde_ctx);
2642 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2643 ptr_blk = fde_ctx->data + len;
2644 id = dwarf2_parse_u4(fde_ctx);
2645 if (id == cie_id)
2646 {
2647 last_cie_ptr = fde_ctx->data - 8;
2648 /* we need some bits out of the CIE in order to parse all contents */
2649 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2650 cie_ctx->data = fde_ctx->data;
2651 cie_ctx->end_data = ptr_blk;
2652 cie_ctx->word_size = fde_ctx->word_size;
2653 continue;
2654 }
2655 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2656 if (cie_ptr != last_cie_ptr)
2657 {
2658 last_cie_ptr = cie_ptr;
2659 cie_ctx->data = cie_ptr;
2660 cie_ctx->word_size = fde_ctx->word_size;
2661 cie_ctx->end_data = cie_ptr + 4;
2662 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2663 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2664 {
2665 FIXME("wrong CIE pointer\n");
2666 return FALSE;
2667 }
2668 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2669 }
2670 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2671 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2672
2673 if (addr >= start && addr < start + range)
2674 {
2675 /* reset the FDE context */
2676 fde_ctx->end_data = ptr_blk;
2677
2678 info->ip = start;
2679 return TRUE;
2680 }
2681 }
2682 return FALSE;
2683 }
2684
2685 static int valid_reg(ULONG_PTR reg)
2686 {
2687 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2688 return (reg < NB_FRAME_REGS);
2689 }
2690
2691 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2692 ULONG_PTR last_ip, struct frame_info *info)
2693 {
2694 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame)
2695 {
2696 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2697
2698 if (op & 0xc0)
2699 {
2700 switch (op & 0xc0)
2701 {
2702 case DW_CFA_advance_loc:
2703 {
2704 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2705 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2706 info->ip += offset;
2707 break;
2708 }
2709 case DW_CFA_offset:
2710 {
2711 ULONG_PTR reg = op & 0x3f;
2712 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2713 if (!valid_reg(reg)) break;
2714 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2715 info->ip,
2716 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2717 offset);
2718 info->state.regs[reg] = offset;
2719 info->state.rules[reg] = RULE_CFA_OFFSET;
2720 break;
2721 }
2722 case DW_CFA_restore:
2723 {
2724 ULONG_PTR reg = op & 0x3f;
2725 if (!valid_reg(reg)) break;
2726 TRACE("%lx: DW_CFA_restore %s\n",
2727 info->ip,
2728 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2729 info->state.rules[reg] = RULE_UNSET;
2730 break;
2731 }
2732 }
2733 }
2734 else switch (op)
2735 {
2736 case DW_CFA_nop:
2737 break;
2738 case DW_CFA_set_loc:
2739 {
2740 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2741 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2742 info->ip = loc;
2743 break;
2744 }
2745 case DW_CFA_advance_loc1:
2746 {
2747 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2748 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2749 info->ip += offset;
2750 break;
2751 }
2752 case DW_CFA_advance_loc2:
2753 {
2754 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2755 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2756 info->ip += offset;
2757 break;
2758 }
2759 case DW_CFA_advance_loc4:
2760 {
2761 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2762 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2763 info->ip += offset;
2764 break;
2765 }
2766 case DW_CFA_offset_extended:
2767 case DW_CFA_offset_extended_sf:
2768 {
2769 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2770 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2771 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2772 if (!valid_reg(reg)) break;
2773 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2774 info->ip,
2775 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2776 offset);
2777 info->state.regs[reg] = offset;
2778 info->state.rules[reg] = RULE_CFA_OFFSET;
2779 break;
2780 }
2781 case DW_CFA_restore_extended:
2782 {
2783 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2784 if (!valid_reg(reg)) break;
2785 TRACE("%lx: DW_CFA_restore_extended %s\n",
2786 info->ip,
2787 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2788 info->state.rules[reg] = RULE_UNSET;
2789 break;
2790 }
2791 case DW_CFA_undefined:
2792 {
2793 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2794 if (!valid_reg(reg)) break;
2795 TRACE("%lx: DW_CFA_undefined %s\n",
2796 info->ip,
2797 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2798 info->state.rules[reg] = RULE_UNDEFINED;
2799 break;
2800 }
2801 case DW_CFA_same_value:
2802 {
2803 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2804 if (!valid_reg(reg)) break;
2805 TRACE("%lx: DW_CFA_same_value %s\n",
2806 info->ip,
2807 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2808 info->state.regs[reg] = reg;
2809 info->state.rules[reg] = RULE_SAME;
2810 break;
2811 }
2812 case DW_CFA_register:
2813 {
2814 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2815 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2816 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2817 TRACE("%lx: DW_CFA_register %s == %s\n",
2818 info->ip,
2819 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2820 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2)));
2821 info->state.regs[reg] = reg2;
2822 info->state.rules[reg] = RULE_OTHER_REG;
2823 break;
2824 }
2825 case DW_CFA_remember_state:
2826 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2827 if (info->state_sp >= MAX_SAVED_STATES)
2828 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2829 else
2830 info->state_stack[info->state_sp++] = info->state;
2831 break;
2832 case DW_CFA_restore_state:
2833 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2834 if (!info->state_sp)
2835 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2836 else
2837 info->state = info->state_stack[--info->state_sp];
2838 break;
2839 case DW_CFA_def_cfa:
2840 case DW_CFA_def_cfa_sf:
2841 {
2842 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2843 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2844 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2845 if (!valid_reg(reg)) break;
2846 TRACE("%lx: DW_CFA_def_cfa %s, %lu\n",
2847 info->ip,
2848 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2849 offset);
2850 info->state.cfa_reg = reg;
2851 info->state.cfa_offset = offset;
2852 info->state.cfa_rule = RULE_CFA_OFFSET;
2853 break;
2854 }
2855 case DW_CFA_def_cfa_register:
2856 {
2857 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2858 if (!valid_reg(reg)) break;
2859 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2860 info->ip,
2861 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)));
2862 info->state.cfa_reg = reg;
2863 info->state.cfa_rule = RULE_CFA_OFFSET;
2864 break;
2865 }
2866 case DW_CFA_def_cfa_offset:
2867 case DW_CFA_def_cfa_offset_sf:
2868 {
2869 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2870 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2871 TRACE("%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset);
2872 info->state.cfa_offset = offset;
2873 info->state.cfa_rule = RULE_CFA_OFFSET;
2874 break;
2875 }
2876 case DW_CFA_def_cfa_expression:
2877 {
2878 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2879 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2880 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2881 info->state.cfa_offset = expr;
2882 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2883 ctx->data += len;
2884 break;
2885 }
2886 case DW_CFA_expression:
2887 case DW_CFA_val_expression:
2888 {
2889 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2890 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2891 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2892 if (!valid_reg(reg)) break;
2893 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
2894 info->ip, (op == DW_CFA_expression) ? "" : "val_",
2895 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg)),
2896 expr, expr + len);
2897 info->state.regs[reg] = expr;
2898 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
2899 ctx->data += len;
2900 break;
2901 }
2902 case DW_CFA_GNU_args_size:
2903 /* FIXME: should check that GCC is the compiler for this CU */
2904 {
2905 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
2906 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
2907 /* ignored */
2908 break;
2909 }
2910 default:
2911 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
2912 break;
2913 }
2914 }
2915 }
2916
2917 /* retrieve a context register from its dwarf number */
2918 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
2919 {
2920 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2921 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2922
2923 if (sz != sizeof(ULONG_PTR))
2924 {
2925 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2926 return 0;
2927 }
2928 return *ptr;
2929 }
2930
2931 /* set a context register from its dwarf number */
2932 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg,
2933 ULONG_PTR val, BOOL isdebuggee)
2934 {
2935 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg), sz;
2936 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
2937
2938 if (isdebuggee)
2939 {
2940 char tmp[16];
2941
2942 if (sz > sizeof(tmp))
2943 {
2944 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz);
2945 return;
2946 }
2947 if (!sw_read_mem(csw, val, tmp, sz))
2948 {
2949 WARN("Couldn't read memory at %p\n", (void*)val);
2950 return;
2951 }
2952 memcpy(ptr, tmp, sz);
2953 }
2954 else
2955 {
2956 if (sz != sizeof(ULONG_PTR))
2957 {
2958 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
2959 return;
2960 }
2961 *ptr = val;
2962 }
2963 }
2964
2965 /* copy a register from one context to another using dwarf number */
2966 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc)
2967 {
2968 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst), szdst;
2969 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc), szsrc;
2970 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst);
2971 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc);
2972
2973 if (szdst != szsrc)
2974 {
2975 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n",
2976 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst);
2977 return;
2978 }
2979 memcpy(ptrdst, ptrsrc, szdst);
2980 }
2981
2982 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw,
2983 const unsigned char* zp, CONTEXT *context)
2984 {
2985 dwarf2_traverse_context_t ctx;
2986 ULONG_PTR reg, sz, tmp, stack[64];
2987 int sp = -1;
2988 ULONG_PTR len;
2989
2990 ctx.data = zp;
2991 ctx.end_data = zp + 4;
2992 len = dwarf2_leb128_as_unsigned(&ctx);
2993 ctx.end_data = ctx.data + len;
2994 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2995
2996 while (ctx.data < ctx.end_data)
2997 {
2998 unsigned char opcode = dwarf2_parse_byte(&ctx);
2999
3000 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
3001 stack[++sp] = opcode - DW_OP_lit0;
3002 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
3003 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0);
3004 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
3005 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx);
3006 else switch (opcode)
3007 {
3008 case DW_OP_nop: break;
3009 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break;
3010 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break;
3011 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break;
3012 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break;
3013 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break;
3014 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break;
3015 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break;
3016 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break;
3017 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break;
3018 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break;
3019 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break;
3020 case DW_OP_deref:
3021 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp)))
3022 {
3023 ERR("Couldn't read memory at %lx\n", stack[sp]);
3024 tmp = 0;
3025 }
3026 stack[sp] = tmp;
3027 break;
3028 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
3029 case DW_OP_drop: sp--; break;
3030 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
3031 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break;
3032 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
3033 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
3034 case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
3035 case DW_OP_neg: stack[sp] = -stack[sp]; break;
3036 case DW_OP_not: stack[sp] = ~stack[sp]; break;
3037 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
3038 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
3039 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
3040 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
3041 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
3042 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
3043 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
3044 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
3045 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break;
3046 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
3047 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
3048 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
3049 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
3050 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
3051 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
3052 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
3053 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
3054 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
3055 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break;
3056 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break;
3057 case DW_OP_GNU_encoded_addr:
3058 tmp = dwarf2_parse_byte(&ctx);
3059 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp);
3060 break;
3061 case DW_OP_regx:
3062 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx));
3063 break;
3064 case DW_OP_bregx:
3065 reg = dwarf2_leb128_as_unsigned(&ctx);
3066 tmp = dwarf2_leb128_as_signed(&ctx);
3067 stack[++sp] = get_context_reg(context, reg) + tmp;
3068 break;
3069 case DW_OP_deref_size:
3070 sz = dwarf2_parse_byte(&ctx);
3071 if (!sw_read_mem(csw, stack[sp], &tmp, sz))
3072 {
3073 ERR("Couldn't read memory at %lx\n", stack[sp]);
3074 tmp = 0;
3075 }
3076 /* do integral promotion */
3077 switch (sz)
3078 {
3079 case 1: stack[sp] = *(unsigned char*)&tmp; break;
3080 case 2: stack[sp] = *(unsigned short*)&tmp; break;
3081 case 4: stack[sp] = *(unsigned int*)&tmp; break;
3082 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */
3083 default: FIXME("Unknown size for deref 0x%lx\n", sz);
3084 }
3085 break;
3086 default:
3087 FIXME("unhandled opcode %02x\n", opcode);
3088 }
3089 }
3090 return stack[sp];
3091 }
3092
3093 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw,
3094 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa)
3095 {
3096 unsigned int i;
3097 ULONG_PTR value;
3098 CONTEXT new_context = *context;
3099
3100 switch (state->cfa_rule)
3101 {
3102 case RULE_EXPRESSION:
3103 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3104 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa)))
3105 {
3106 WARN("Couldn't read memory at %p\n", (void*)*cfa);
3107 return;
3108 }
3109 break;
3110 case RULE_VAL_EXPRESSION:
3111 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context);
3112 break;
3113 default:
3114 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset;
3115 break;
3116 }
3117 if (!*cfa) return;
3118
3119 for (i = 0; i < NB_FRAME_REGS; i++)
3120 {
3121 switch (state->rules[i])
3122 {
3123 case RULE_UNSET:
3124 case RULE_UNDEFINED:
3125 case RULE_SAME:
3126 break;
3127 case RULE_CFA_OFFSET:
3128 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE);
3129 break;
3130 case RULE_OTHER_REG:
3131 copy_context_reg(&new_context, i, context, state->regs[i]);
3132 break;
3133 case RULE_EXPRESSION:
3134 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3135 set_context_reg(csw, &new_context, i, value, TRUE);
3136 break;
3137 case RULE_VAL_EXPRESSION:
3138 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context);
3139 set_context_reg(csw, &new_context, i, value, FALSE);
3140 break;
3141 }
3142 }
3143 *context = new_context;
3144 }
3145
3146 /***********************************************************************
3147 * dwarf2_virtual_unwind
3148 *
3149 */
3150 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa)
3151 {
3152 struct module_pair pair;
3153 struct frame_info info;
3154 dwarf2_traverse_context_t cie_ctx, fde_ctx;
3155 struct module_format* modfmt;
3156 const unsigned char* end;
3157 DWORD_PTR delta;
3158
3159 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) ||
3160 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) ||
3161 !module_get_debug(&pair))
3162 return FALSE;
3163 modfmt = pair.effective->format_info[DFI_DWARF];
3164 if (!modfmt) return FALSE;
3165 memset(&info, 0, sizeof(info));
3166 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address;
3167 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size;
3168 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3169 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map
3170 * in this process the IMAGE section at a different address as the one expected by
3171 * the image
3172 */
3173 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva -
3174 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address;
3175 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE))
3176 {
3177 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address;
3178 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size;
3179 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size;
3180 delta = pair.effective->reloc_delta;
3181 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE))
3182 {
3183 TRACE("Couldn't find information for %lx\n", ip);
3184 return FALSE;
3185 }
3186 }
3187
3188 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n",
3189 ip, info.ip, info.code_align, info.data_align,
3190 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg)));
3191
3192 /* if at very beginning of function, return and use default unwinder */
3193 if (ip == info.ip) return FALSE;
3194 execute_cfa_instructions(&cie_ctx, ip, &info);
3195
3196 if (info.aug_z_format) /* get length of augmentation data */
3197 {
3198 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx);
3199 end = fde_ctx.data + len;
3200 }
3201 else end = NULL;
3202 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */
3203 if (end) fde_ctx.data = end;
3204
3205 execute_cfa_instructions(&fde_ctx, ip, &info);
3206 apply_frame_state(pair.effective, csw, context, &info.state, cfa);
3207
3208 return TRUE;
3209 }
3210
3211 static void dwarf2_location_compute(struct process* pcs,
3212 const struct module_format* modfmt,
3213 const struct symt_function* func,
3214 struct location* loc)
3215 {
3216 struct location frame;
3217 DWORD_PTR ip;
3218 int err;
3219 dwarf2_traverse_context_t lctx;
3220
3221 if (!func->container || func->container->tag != SymTagCompiland)
3222 {
3223 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
3224 err = loc_err_internal;
3225 }
3226 else
3227 {
3228 /* instruction pointer relative to compiland's start */
3229 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
3230
3231 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0)
3232 {
3233 switch (loc->kind)
3234 {
3235 case loc_dwarf2_location_list:
3236 /* Then, if the variable has a location list, find it !! */
3237 if (dwarf2_lookup_loclist(modfmt,
3238 modfmt->u.dwarf2_info->debug_loc.address + loc->offset,
3239 ip, &lctx))
3240 goto do_compute;
3241 err = loc_err_out_of_scope;
3242 break;
3243 case loc_dwarf2_block:
3244 /* or if we have a copy of an existing block, get ready for it */
3245 {
3246 unsigned* ptr = (unsigned*)loc->offset;
3247
3248 lctx.data = (const BYTE*)(ptr + 1);
3249 lctx.end_data = lctx.data + *ptr;
3250 lctx.word_size = modfmt->u.dwarf2_info->word_size;
3251 }
3252 do_compute:
3253 /* now get the variable */
3254 err = compute_location(&lctx, loc, pcs->handle, &frame);
3255 break;
3256 case loc_register:
3257 case loc_regrel:
3258 /* nothing to do */
3259 break;
3260 default:
3261 WARN("Unsupported local kind %d\n", loc->kind);
3262 err = loc_err_internal;
3263 }
3264 }
3265 }
3266 if (err < 0)
3267 {
3268 loc->kind = loc_register;
3269 loc->reg = err;
3270 }
3271 }
3272
3273 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt)
3274 {
3275 HeapFree(GetProcessHeap(), 0, modfmt);
3276 }
3277
3278 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap,
3279 const char* sectname, struct image_section_map* ism)
3280 {
3281 struct image_section_map local_ism;
3282
3283 if (!ism) ism = &local_ism;
3284 if (!image_find_section(fmap, sectname, ism))
3285 {
3286 section->address = NULL;
3287 section->size = 0;
3288 section->rva = 0;
3289 return FALSE;
3290 }
3291
3292 section->address = (const BYTE*)image_map_section(ism);
3293 section->size = image_get_map_size(ism);
3294 section->rva = image_get_map_rva(ism);
3295 return TRUE;
3296 }
3297
3298 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
3299 const struct elf_thunk_area* thunks,
3300 struct image_file_map* fmap)
3301 {
3302 dwarf2_section_t eh_frame, section[section_max];
3303 dwarf2_traverse_context_t mod_ctx;
3304 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect,
3305 debug_line_sect, debug_ranges_sect, eh_frame_sect;
3306 BOOL ret = TRUE;
3307 struct module_format* dwarf2_modfmt;
3308
3309 dwarf2_init_section(&eh_frame, fmap, ".eh_frame", &eh_frame_sect);
3310 dwarf2_init_section(&section[section_debug], fmap, ".debug_info", &debug_sect);
3311 dwarf2_init_section(&section[section_abbrev], fmap, ".debug_abbrev", &debug_abbrev_sect);
3312 dwarf2_init_section(&section[section_string], fmap, ".debug_str", &debug_str_sect);
3313 dwarf2_init_section(&section[section_line], fmap, ".debug_line", &debug_line_sect);
3314 dwarf2_init_section(&section[section_ranges], fmap, ".debug_ranges", &debug_ranges_sect);
3315
3316 /* to do anything useful we need either .eh_frame or .debug_info */
3317 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) &&
3318 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP))
3319 {
3320 ret = FALSE;
3321 goto leave;
3322 }
3323
3324 if (fmap->modtype == DMT_ELF && debug_sect.fmap)
3325 {
3326 /* debug info might have a different base address than .so file
3327 * when elf file is prelinked after splitting off debug info
3328 * adjust symbol base addresses accordingly
3329 */
3330 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start;
3331 }
3332
3333 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName));
3334
3335 mod_ctx.data = section[section_debug].address;
3336 mod_ctx.end_data = mod_ctx.data + section[section_debug].size;
3337 mod_ctx.word_size = 0; /* will be correctly set later on */
3338
3339 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0,
3340 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info));
3341 if (!dwarf2_modfmt)
3342 {
3343 ret = FALSE;
3344 goto leave;
3345 }
3346 dwarf2_modfmt->module = module;
3347 dwarf2_modfmt->remove = dwarf2_module_remove;
3348 dwarf2_modfmt->loc_compute = dwarf2_location_compute;
3349 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1);
3350 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */
3351 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt;
3352
3353 /* As we'll need later some sections' content, we won't unmap these
3354 * sections upon existing this function
3355 */
3356 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", NULL);
3357 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", NULL);
3358 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame;
3359
3360 while (mod_ctx.data < mod_ctx.end_data)
3361 {
3362 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset);
3363 }
3364 dwarf2_modfmt->module->module.SymType = SymDia;
3365 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
3366 /* FIXME: we could have a finer grain here */
3367 dwarf2_modfmt->module->module.GlobalSymbols = TRUE;
3368 dwarf2_modfmt->module->module.TypeInfo = TRUE;
3369 dwarf2_modfmt->module->module.SourceIndexed = TRUE;
3370 dwarf2_modfmt->module->module.Publics = TRUE;
3371
3372 leave:
3373 image_unmap_section(&debug_sect);
3374 image_unmap_section(&debug_abbrev_sect);
3375 image_unmap_section(&debug_str_sect);
3376 image_unmap_section(&debug_line_sect);
3377 image_unmap_section(&debug_ranges_sect);
3378 if (!ret) image_unmap_section(&eh_frame_sect);
3379
3380 return ret;
3381 }
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