[DBGHELP] Fix 64 bit issue
[reactos.git] / dll / win32 / dbghelp / dwarf.c
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006-2011, Eric Pouech
6 * Copyright (C) 2010, Alexandre Julliard
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #ifndef DBGHELP_STATIC_LIB
24
25 #define NONAMELESSUNION
26
27 #include "config.h"
28
29 #include <sys/types.h>
30 #include <fcntl.h>
31 #ifdef HAVE_SYS_STAT_H
32 # include <sys/stat.h>
33 #endif
34 #ifdef HAVE_SYS_MMAN_H
35 #include <sys/mman.h>
36 #endif
37 #include <limits.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #ifdef HAVE_UNISTD_H
41 # include <unistd.h>
42 #endif
43 #include <stdio.h>
44 #include <assert.h>
45 #include <stdarg.h>
46
47 #ifdef HAVE_ZLIB
48 #include <zlib.h>
49 #endif
50
51 #include "windef.h"
52 #include "winternl.h"
53 #include "winbase.h"
54 #include "winuser.h"
55 #include "ole2.h"
56 #include "oleauto.h"
57
58 #include "dbghelp_private.h"
59 #include "image_private.h"
60
61 #include "wine/debug.h"
62
63 #else
64 #include "dbghelp_private.h"
65 #include "image_private.h"
66 #endif /* !DBGHELP_STATIC_LIB */
67
68 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
69
70 /* FIXME:
71 * - Functions:
72 * o unspecified parameters
73 * o inlined functions
74 * o Debug{Start|End}Point
75 * o CFA
76 * - Udt
77 * o proper types loading (nesting)
78 */
79
80 #if 0
81 static void dump(const void* ptr, unsigned len)
82 {
83 int i, j;
84 BYTE msg[128];
85 static const char hexof[] = "0123456789abcdef";
86 const BYTE* x = ptr;
87
88 for (i = 0; i < len; i += 16)
89 {
90 sprintf(msg, "%08x: ", i);
91 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
92 for (j = 0; j < min(16, len - i); j++)
93 {
94 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
95 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
96 msg[10 + 3 * j + 2] = ' ';
97 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
98 x[i + j] : '.';
99 }
100 msg[10 + 3 * 16] = ' ';
101 msg[10 + 3 * 16 + 1 + 16] = '\0';
102 TRACE("%s\n", msg);
103 }
104 }
105 #endif
106
107 /**
108 *
109 * Main Specs:
110 * http://www.eagercon.com/dwarf/dwarf3std.htm
111 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
112 *
113 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
114 *
115 * example of projects who do dwarf2 parsing:
116 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
117 * http://elis.ugent.be/diota/log/ltrace_elf.c
118 */
119 #include "dwarf.h"
120
121 /**
122 * Parsers
123 */
124
125 typedef struct dwarf2_abbrev_entry_attr_s
126 {
127 unsigned long attribute;
128 unsigned long form;
129 struct dwarf2_abbrev_entry_attr_s* next;
130 } dwarf2_abbrev_entry_attr_t;
131
132 typedef struct dwarf2_abbrev_entry_s
133 {
134 unsigned long entry_code;
135 unsigned long tag;
136 unsigned char have_child;
137 unsigned num_attr;
138 dwarf2_abbrev_entry_attr_t* attrs;
139 } dwarf2_abbrev_entry_t;
140
141 struct dwarf2_block
142 {
143 unsigned size;
144 const unsigned char* ptr;
145 };
146
147 struct attribute
148 {
149 unsigned long form;
150 enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from;
151 union
152 {
153 unsigned long uvalue;
154 ULONGLONG lluvalue;
155 long svalue;
156 const char* string;
157 struct dwarf2_block block;
158 } u;
159 };
160
161 typedef struct dwarf2_debug_info_s
162 {
163 const dwarf2_abbrev_entry_t*abbrev;
164 struct symt* symt;
165 const unsigned char** data;
166 struct vector children;
167 struct dwarf2_debug_info_s* parent;
168 } dwarf2_debug_info_t;
169
170 typedef struct dwarf2_section_s
171 {
172 BOOL compressed;
173 const unsigned char* address;
174 unsigned size;
175 DWORD_PTR rva;
176 } dwarf2_section_t;
177
178 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max};
179
180 typedef struct dwarf2_traverse_context_s
181 {
182 const unsigned char* data;
183 const unsigned char* end_data;
184 unsigned char word_size;
185 } dwarf2_traverse_context_t;
186
187 /* symt_cache indexes */
188 #define sc_void 0
189 #define sc_int1 1
190 #define sc_int2 2
191 #define sc_int4 3
192 #define sc_num 4
193
194 typedef struct dwarf2_parse_context_s
195 {
196 const dwarf2_section_t* sections;
197 unsigned section;
198 struct pool pool;
199 struct module* module;
200 struct symt_compiland* compiland;
201 const struct elf_thunk_area*thunks;
202 struct sparse_array abbrev_table;
203 struct sparse_array debug_info_table;
204 unsigned long load_offset;
205 unsigned long ref_offset;
206 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
207 char* cpp_name;
208 } dwarf2_parse_context_t;
209
210 /* stored in the dbghelp's module internal structure for later reuse */
211 struct dwarf2_module_info_s
212 {
213 dwarf2_section_t debug_loc;
214 dwarf2_section_t debug_frame;
215 dwarf2_section_t eh_frame;
216 unsigned char word_size;
217 };
218
219 #define loc_dwarf2_location_list (loc_user + 0)
220 #define loc_dwarf2_block (loc_user + 1)
221
222 /* forward declarations */
223 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
224
225 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
226 {
227 return *ptr;
228 }
229
230 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
231 {
232 unsigned char uvalue = dwarf2_get_byte(ctx->data);
233 ctx->data += 1;
234 return uvalue;
235 }
236
237 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
238 {
239 return *(const UINT16*)ptr;
240 }
241
242 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
243 {
244 unsigned short uvalue = dwarf2_get_u2(ctx->data);
245 ctx->data += 2;
246 return uvalue;
247 }
248
249 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
250 {
251 return *(const UINT32*)ptr;
252 }
253
254 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
255 {
256 unsigned long uvalue = dwarf2_get_u4(ctx->data);
257 ctx->data += 4;
258 return uvalue;
259 }
260
261 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
262 {
263 return *(const UINT64*)ptr;
264 }
265
266 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx)
267 {
268 DWORD64 uvalue = dwarf2_get_u8(ctx->data);
269 ctx->data += 8;
270 return uvalue;
271 }
272
273 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
274 {
275 unsigned long ret = 0;
276 unsigned char byte;
277 unsigned shift = 0;
278
279 do
280 {
281 byte = dwarf2_get_byte(ptr++);
282 ret |= (byte & 0x7f) << shift;
283 shift += 7;
284 } while (byte & 0x80);
285
286 if (end) *end = ptr;
287 return ret;
288 }
289
290 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
291 {
292 unsigned long ret;
293
294 assert(ctx);
295
296 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
297
298 return ret;
299 }
300
301 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
302 {
303 long ret = 0;
304 unsigned char byte;
305 unsigned shift = 0;
306 const unsigned size = sizeof(int) * 8;
307
308 do
309 {
310 byte = dwarf2_get_byte(ptr++);
311 ret |= (byte & 0x7f) << shift;
312 shift += 7;
313 } while (byte & 0x80);
314 if (end) *end = ptr;
315
316 /* as spec: sign bit of byte is 2nd high order bit (80x40)
317 * -> 0x80 is used as flag.
318 */
319 if ((shift < size) && (byte & 0x40))
320 {
321 ret |= - (1 << shift);
322 }
323 return ret;
324 }
325
326 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
327 {
328 long ret = 0;
329
330 assert(ctx);
331
332 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
333 return ret;
334 }
335
336 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
337 {
338 unsigned ret;
339 for (ret = 0; ctx->data[ret] & 0x80; ret++);
340 return ret + 1;
341 }
342
343 /******************************************************************
344 * dwarf2_get_addr
345 *
346 * Returns an address.
347 * We assume that in all cases word size from Dwarf matches the size of
348 * addresses in platform where the exec is compiled.
349 */
350 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
351 {
352 unsigned long ret;
353
354 switch (word_size)
355 {
356 case 4:
357 ret = dwarf2_get_u4(ptr);
358 break;
359 case 8:
360 ret = dwarf2_get_u8(ptr);
361 break;
362 default:
363 FIXME("Unsupported Word Size %u\n", word_size);
364 ret = 0;
365 }
366 return ret;
367 }
368
369 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
370 {
371 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
372 ctx->data += ctx->word_size;
373 return ret;
374 }
375
376 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
377 {
378 return wine_dbg_sprintf("ctx(%p)", ctx->data);
379 }
380
381 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
382 {
383 return wine_dbg_sprintf("ctx(%p,%s)",
384 ctx, debugstr_w(ctx->module->module.ModuleName));
385 }
386
387 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
388 {
389 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
390 di->abbrev, di->symt);
391 }
392
393 static dwarf2_abbrev_entry_t*
394 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
395 unsigned long entry_code)
396 {
397 assert( NULL != abbrev_table );
398 return sparse_array_find(abbrev_table, entry_code);
399 }
400
401 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
402 struct sparse_array* abbrev_table,
403 struct pool* pool)
404 {
405 unsigned long entry_code;
406 dwarf2_abbrev_entry_t* abbrev_entry;
407 dwarf2_abbrev_entry_attr_t* new = NULL;
408 dwarf2_abbrev_entry_attr_t* last = NULL;
409 unsigned long attribute;
410 unsigned long form;
411
412 assert( NULL != abbrev_ctx );
413
414 TRACE("%s, end at %p\n",
415 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
416
417 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
418 while (abbrev_ctx->data < abbrev_ctx->end_data)
419 {
420 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
421 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
422 TRACE("found entry_code %lu\n", entry_code);
423 if (!entry_code)
424 {
425 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
426 break;
427 }
428 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
429 assert( NULL != abbrev_entry );
430
431 abbrev_entry->entry_code = entry_code;
432 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
433 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
434 abbrev_entry->attrs = NULL;
435 abbrev_entry->num_attr = 0;
436
437 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
438 abbrev_table, sparse_array_length(abbrev_table),
439 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
440
441 last = NULL;
442 while (1)
443 {
444 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
445 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
446 if (!attribute) break;
447
448 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
449 assert(new);
450
451 new->attribute = attribute;
452 new->form = form;
453 new->next = NULL;
454 if (abbrev_entry->attrs) last->next = new;
455 else abbrev_entry->attrs = new;
456 last = new;
457 abbrev_entry->num_attr++;
458 }
459 }
460 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
461 }
462
463 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
464 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
465 {
466 unsigned step;
467
468 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
469
470 switch (abbrev_attr->form)
471 {
472 case DW_FORM_flag_present: step = 0; break;
473 case DW_FORM_ref_addr:
474 case DW_FORM_addr: step = ctx->word_size; break;
475 case DW_FORM_flag:
476 case DW_FORM_data1:
477 case DW_FORM_ref1: step = 1; break;
478 case DW_FORM_data2:
479 case DW_FORM_ref2: step = 2; break;
480 case DW_FORM_data4:
481 case DW_FORM_ref4:
482 case DW_FORM_strp: step = 4; break;
483 case DW_FORM_data8:
484 case DW_FORM_ref8: step = 8; break;
485 case DW_FORM_sdata:
486 case DW_FORM_ref_udata:
487 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
488 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
489 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
490 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
491 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
492 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
493 default:
494 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
495 return;
496 }
497 ctx->data += step;
498 }
499
500 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
501 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
502 const unsigned char* data,
503 struct attribute* attr)
504 {
505 attr->form = abbrev_attr->form;
506 switch (attr->form)
507 {
508 case DW_FORM_ref_addr:
509 case DW_FORM_addr:
510 attr->u.uvalue = dwarf2_get_addr(data,
511 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size);
512 TRACE("addr<0x%lx>\n", attr->u.uvalue);
513 break;
514
515 case DW_FORM_flag:
516 attr->u.uvalue = dwarf2_get_byte(data);
517 TRACE("flag<0x%lx>\n", attr->u.uvalue);
518 break;
519
520 case DW_FORM_flag_present:
521 attr->u.uvalue = 1;
522 TRACE("flag_present\n");
523 break;
524
525 case DW_FORM_data1:
526 attr->u.uvalue = dwarf2_get_byte(data);
527 TRACE("data1<%lu>\n", attr->u.uvalue);
528 break;
529
530 case DW_FORM_data2:
531 attr->u.uvalue = dwarf2_get_u2(data);
532 TRACE("data2<%lu>\n", attr->u.uvalue);
533 break;
534
535 case DW_FORM_data4:
536 attr->u.uvalue = dwarf2_get_u4(data);
537 TRACE("data4<%lu>\n", attr->u.uvalue);
538 break;
539
540 case DW_FORM_data8:
541 attr->u.lluvalue = dwarf2_get_u8(data);
542 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue));
543 break;
544
545 case DW_FORM_ref1:
546 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
547 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
548 break;
549
550 case DW_FORM_ref2:
551 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
552 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
553 break;
554
555 case DW_FORM_ref4:
556 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
557 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
558 break;
559
560 case DW_FORM_ref8:
561 FIXME("Unhandled 64-bit support\n");
562 break;
563
564 case DW_FORM_sdata:
565 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
566 break;
567
568 case DW_FORM_ref_udata:
569 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
570 break;
571
572 case DW_FORM_udata:
573 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
574 break;
575
576 case DW_FORM_string:
577 attr->u.string = (const char *)data;
578 TRACE("string<%s>\n", attr->u.string);
579 break;
580
581 case DW_FORM_strp:
582 {
583 unsigned long offset = dwarf2_get_u4(data);
584 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
585 }
586 TRACE("strp<%s>\n", attr->u.string);
587 break;
588
589 case DW_FORM_block:
590 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
591 break;
592
593 case DW_FORM_block1:
594 attr->u.block.size = dwarf2_get_byte(data);
595 attr->u.block.ptr = data + 1;
596 break;
597
598 case DW_FORM_block2:
599 attr->u.block.size = dwarf2_get_u2(data);
600 attr->u.block.ptr = data + 2;
601 break;
602
603 case DW_FORM_block4:
604 attr->u.block.size = dwarf2_get_u4(data);
605 attr->u.block.ptr = data + 4;
606 break;
607
608 default:
609 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
610 break;
611 }
612 }
613
614 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
615 const dwarf2_debug_info_t* di,
616 unsigned at, struct attribute* attr)
617 {
618 unsigned i, refidx = 0;
619 dwarf2_abbrev_entry_attr_t* abbrev_attr;
620 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL;
621
622 attr->gotten_from = attr_direct;
623 while (di)
624 {
625 ref_abbrev_attr = NULL;
626 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
627 {
628 if (abbrev_attr->attribute == at)
629 {
630 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
631 return TRUE;
632 }
633 if ((abbrev_attr->attribute == DW_AT_abstract_origin ||
634 abbrev_attr->attribute == DW_AT_specification) &&
635 at != DW_AT_sibling)
636 {
637 if (ref_abbrev_attr)
638 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute);
639 ref_abbrev_attr = abbrev_attr;
640 refidx = i;
641 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ?
642 attr_abstract_origin : attr_specification;
643 }
644 }
645 /* do we have either an abstract origin or a specification debug entry to look into ? */
646 if (!ref_abbrev_attr) break;
647 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr);
648 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
649 FIXME("Should have found the debug info entry\n");
650 }
651 return FALSE;
652 }
653
654 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*);
655
656 #define Wine_DW_no_register 0x7FFFFFFF
657
658 static unsigned dwarf2_map_register(int regno)
659 {
660 if (regno == Wine_DW_no_register)
661 {
662 FIXME("What the heck map reg 0x%x\n",regno);
663 return 0;
664 }
665 return dbghelp_current_cpu->map_dwarf_register(regno, FALSE);
666 }
667
668 static enum location_error
669 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
670 HANDLE hproc, const struct location* frame)
671 {
672 DWORD_PTR tmp, stack[64];
673 unsigned stk;
674 unsigned char op;
675 BOOL piece_found = FALSE;
676
677 stack[stk = 0] = 0;
678
679 loc->kind = loc_absolute;
680 loc->reg = Wine_DW_no_register;
681
682 while (ctx->data < ctx->end_data)
683 {
684 op = dwarf2_parse_byte(ctx);
685
686 if (op >= DW_OP_lit0 && op <= DW_OP_lit31)
687 stack[++stk] = op - DW_OP_lit0;
688 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31)
689 {
690 /* dbghelp APIs don't know how to cope with this anyway
691 * (for example 'long long' stored in two registers)
692 * FIXME: We should tell winedbg how to deal with it (sigh)
693 */
694 if (!piece_found)
695 {
696 DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0);
697 if (loc->reg != Wine_DW_no_register)
698 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n",
699 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
700 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
701 loc->reg = cvreg;
702 }
703 loc->kind = loc_register;
704 }
705 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31)
706 {
707 /* dbghelp APIs don't know how to cope with this anyway
708 * (for example 'long long' stored in two registers)
709 * FIXME: We should tell winedbg how to deal with it (sigh)
710 */
711 if (!piece_found)
712 {
713 DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0);
714 if (loc->reg != Wine_DW_no_register)
715 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n",
716 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg,
717 dbghelp_current_cpu->fetch_regname(cvreg), cvreg);
718 loc->reg = cvreg;
719 }
720 stack[++stk] = dwarf2_leb128_as_signed(ctx);
721 loc->kind = loc_regrel;
722 }
723 else switch (op)
724 {
725 case DW_OP_nop: break;
726 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
727 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
728 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break;
729 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
730 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break;
731 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
732 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
733 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break;
734 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break;
735 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
736 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
737 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break;
738 case DW_OP_drop: stk--; break;
739 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break;
740 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break;
741 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break;
742 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break;
743 case DW_OP_abs: stack[stk] = labs(stack[stk]); break;
744 case DW_OP_neg: stack[stk] = -stack[stk]; break;
745 case DW_OP_not: stack[stk] = ~stack[stk]; break;
746 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break;
747 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break;
748 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break;
749 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break;
750 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break;
751 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break;
752 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break;
753 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break;
754 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
755 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break;
756 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break;
757 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break;
758 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break;
759 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break;
760 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break;
761 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break;
762 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break;
763 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break;
764 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break;
765 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break;
766 case DW_OP_regx:
767 tmp = dwarf2_leb128_as_unsigned(ctx);
768 if (!piece_found)
769 {
770 if (loc->reg != Wine_DW_no_register)
771 FIXME("Only supporting one reg\n");
772 loc->reg = dwarf2_map_register(tmp);
773 }
774 loc->kind = loc_register;
775 break;
776 case DW_OP_bregx:
777 tmp = dwarf2_leb128_as_unsigned(ctx);
778 if (loc->reg != Wine_DW_no_register)
779 FIXME("Only supporting one regx\n");
780 loc->reg = dwarf2_map_register(tmp);
781 stack[++stk] = dwarf2_leb128_as_signed(ctx);
782 loc->kind = loc_regrel;
783 break;
784 case DW_OP_fbreg:
785 if (loc->reg != Wine_DW_no_register)
786 FIXME("Only supporting one reg (%s/%d -> -2)\n",
787 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg);
788 if (frame && frame->kind == loc_register)
789 {
790 loc->kind = loc_regrel;
791 loc->reg = frame->reg;
792 stack[++stk] = dwarf2_leb128_as_signed(ctx);
793 }
794 else if (frame && frame->kind == loc_regrel)
795 {
796 loc->kind = loc_regrel;
797 loc->reg = frame->reg;
798 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
799 }
800 else
801 {
802 /* FIXME: this could be later optimized by not recomputing
803 * this very location expression
804 */
805 loc->kind = loc_dwarf2_block;
806 stack[++stk] = dwarf2_leb128_as_signed(ctx);
807 }
808 break;
809 case DW_OP_piece:
810 {
811 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
812 WARN("Not handling OP_piece (size=%d)\n", sz);
813 piece_found = TRUE;
814 }
815 break;
816 case DW_OP_deref:
817 if (!stk)
818 {
819 FIXME("Unexpected empty stack\n");
820 return loc_err_internal;
821 }
822 if (loc->reg != Wine_DW_no_register)
823 {
824 WARN("Too complex expression for deref\n");
825 return loc_err_too_complex;
826 }
827 if (hproc)
828 {
829 DWORD_PTR addr = stack[stk--];
830 DWORD_PTR deref;
831
832 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
833 {
834 WARN("Couldn't read memory at %lx\n", addr);
835 return loc_err_cant_read;
836 }
837 stack[++stk] = deref;
838 }
839 else
840 {
841 loc->kind = loc_dwarf2_block;
842 }
843 break;
844 case DW_OP_deref_size:
845 if (!stk)
846 {
847 FIXME("Unexpected empty stack\n");
848 return loc_err_internal;
849 }
850 if (loc->reg != Wine_DW_no_register)
851 {
852 WARN("Too complex expression for deref\n");
853 return loc_err_too_complex;
854 }
855 if (hproc)
856 {
857 DWORD_PTR addr = stack[stk--];
858 BYTE derefsize = dwarf2_parse_byte(ctx);
859 DWORD64 deref;
860
861 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL))
862 {
863 WARN("Couldn't read memory at %lx\n", addr);
864 return loc_err_cant_read;
865 }
866
867 switch (derefsize)
868 {
869 case 1: stack[++stk] = *(unsigned char*)&deref; break;
870 case 2: stack[++stk] = *(unsigned short*)&deref; break;
871 case 4: stack[++stk] = *(DWORD*)&deref; break;
872 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break;
873 }
874 }
875 else
876 {
877 dwarf2_parse_byte(ctx);
878 loc->kind = loc_dwarf2_block;
879 }
880 break;
881 case DW_OP_stack_value:
882 /* Expected behaviour is that this is the last instruction of this
883 * expression and just the "top of stack" value should be put to loc->offset. */
884 break;
885 default:
886 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
887 FIXME("Unhandled attr op: %x\n", op);
888 /* FIXME else unhandled extension */
889 return loc_err_internal;
890 }
891 }
892 loc->offset = stack[stk];
893 return 0;
894 }
895
896 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
897 const dwarf2_debug_info_t* di,
898 unsigned long dw,
899 struct location* loc,
900 const struct location* frame)
901 {
902 struct attribute xloc;
903
904 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
905
906 switch (xloc.form)
907 {
908 case DW_FORM_data1: case DW_FORM_data2:
909 case DW_FORM_udata: case DW_FORM_sdata:
910 loc->kind = loc_absolute;
911 loc->reg = 0;
912 loc->offset = xloc.u.uvalue;
913 return TRUE;
914 case DW_FORM_data4: case DW_FORM_data8:
915 loc->kind = loc_dwarf2_location_list;
916 loc->reg = Wine_DW_no_register;
917 loc->offset = xloc.u.uvalue;
918 return TRUE;
919 case DW_FORM_block:
920 case DW_FORM_block1:
921 case DW_FORM_block2:
922 case DW_FORM_block4:
923 break;
924 default: FIXME("Unsupported yet form %lx\n", xloc.form);
925 return FALSE;
926 }
927
928 /* assume we have a block form */
929
930 if (xloc.u.block.size)
931 {
932 dwarf2_traverse_context_t lctx;
933 enum location_error err;
934
935 lctx.data = xloc.u.block.ptr;
936 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
937 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
938
939 err = compute_location(&lctx, loc, NULL, frame);
940 if (err < 0)
941 {
942 loc->kind = loc_error;
943 loc->reg = err;
944 }
945 else if (loc->kind == loc_dwarf2_block)
946 {
947 unsigned* ptr = pool_alloc(&ctx->module->pool,
948 sizeof(unsigned) + xloc.u.block.size);
949 *ptr = xloc.u.block.size;
950 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
951 #ifndef __REACTOS__
952 loc->offset = (unsigned long)ptr;
953 #else
954 loc->offset = (uintptr_t)ptr;
955 #endif
956 }
957 }
958 return TRUE;
959 }
960
961 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
962 const dwarf2_debug_info_t* di)
963 {
964 struct attribute attr;
965 dwarf2_debug_info_t* type;
966
967 if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
968 return NULL;
969 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue)))
970 {
971 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
972 return NULL;
973 }
974 if (!type->symt)
975 {
976 /* load the debug info entity */
977 dwarf2_load_one_entry(ctx, type);
978 if (!type->symt)
979 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag);
980 }
981 return type->symt;
982 }
983
984 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name)
985 {
986 char* last;
987 struct attribute diname;
988 struct attribute spec;
989
990 if (di->abbrev->tag == DW_TAG_compile_unit) return name;
991 if (!ctx->cpp_name)
992 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME);
993 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1;
994 strcpy(last, name);
995
996 /* if the di is a definition, but has also a (previous) declaration, then scope must
997 * be gotten from declaration not definition
998 */
999 if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct)
1000 {
1001 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue);
1002 if (!di)
1003 {
1004 FIXME("Should have found the debug info entry\n");
1005 return NULL;
1006 }
1007 }
1008
1009 for (di = di->parent; di; di = di->parent)
1010 {
1011 switch (di->abbrev->tag)
1012 {
1013 case DW_TAG_namespace:
1014 case DW_TAG_structure_type:
1015 case DW_TAG_class_type:
1016 case DW_TAG_interface_type:
1017 case DW_TAG_union_type:
1018 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname))
1019 {
1020 size_t len = strlen(diname.u.string);
1021 last -= 2 + len;
1022 if (last < ctx->cpp_name) return NULL;
1023 memcpy(last, diname.u.string, len);
1024 last[len] = last[len + 1] = ':';
1025 }
1026 break;
1027 default:
1028 break;
1029 }
1030 }
1031 return last;
1032 }
1033
1034 /******************************************************************
1035 * dwarf2_read_range
1036 *
1037 * read a range for a given debug_info (either using AT_range attribute, in which
1038 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes)
1039 * in all cases, range is relative to beginning of compilation unit
1040 */
1041 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di,
1042 unsigned long* plow, unsigned long* phigh)
1043 {
1044 struct attribute range;
1045
1046 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range))
1047 {
1048 dwarf2_traverse_context_t traverse;
1049 unsigned long low, high;
1050
1051 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue;
1052 traverse.end_data = ctx->sections[section_ranges].address +
1053 ctx->sections[section_ranges].size;
1054 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
1055
1056 *plow = ULONG_MAX;
1057 *phigh = 0;
1058 while (traverse.data + 2 * traverse.word_size < traverse.end_data)
1059 {
1060 low = dwarf2_parse_addr(&traverse);
1061 high = dwarf2_parse_addr(&traverse);
1062 if (low == 0 && high == 0) break;
1063 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n");
1064 if (low < *plow) *plow = low;
1065 if (high > *phigh) *phigh = high;
1066 }
1067 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;}
1068 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;}
1069
1070 return TRUE;
1071 }
1072 else
1073 {
1074 struct attribute low_pc;
1075 struct attribute high_pc;
1076
1077 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) ||
1078 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc))
1079 return FALSE;
1080 *plow = low_pc.u.uvalue;
1081 *phigh = high_pc.u.uvalue;
1082 return TRUE;
1083 }
1084 }
1085
1086 /******************************************************************
1087 * dwarf2_read_one_debug_info
1088 *
1089 * Loads into memory one debug info entry, and recursively its children (if any)
1090 */
1091 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
1092 dwarf2_traverse_context_t* traverse,
1093 dwarf2_debug_info_t* parent_di,
1094 dwarf2_debug_info_t** pdi)
1095 {
1096 const dwarf2_abbrev_entry_t*abbrev;
1097 unsigned long entry_code;
1098 unsigned long offset;
1099 dwarf2_debug_info_t* di;
1100 dwarf2_debug_info_t* child;
1101 dwarf2_debug_info_t** where;
1102 dwarf2_abbrev_entry_attr_t* attr;
1103 unsigned i;
1104 struct attribute sibling;
1105
1106 offset = traverse->data - ctx->sections[ctx->section].address;
1107 entry_code = dwarf2_leb128_as_unsigned(traverse);
1108 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
1109 if (!entry_code)
1110 {
1111 *pdi = NULL;
1112 return TRUE;
1113 }
1114 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
1115 if (!abbrev)
1116 {
1117 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
1118 return FALSE;
1119 }
1120 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
1121 if (!di) return FALSE;
1122 di->abbrev = abbrev;
1123 di->symt = NULL;
1124 di->parent = parent_di;
1125
1126 if (abbrev->num_attr)
1127 {
1128 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
1129 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
1130 {
1131 di->data[i] = traverse->data;
1132 dwarf2_swallow_attribute(traverse, attr);
1133 }
1134 }
1135 else di->data = NULL;
1136 if (abbrev->have_child)
1137 {
1138 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
1139 while (traverse->data < traverse->end_data)
1140 {
1141 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE;
1142 if (!child) break;
1143 where = vector_add(&di->children, &ctx->pool);
1144 if (!where) return FALSE;
1145 *where = child;
1146 }
1147 }
1148 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
1149 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
1150 {
1151 WARN("setting cursor for %s to next sibling <0x%lx>\n",
1152 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
1153 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
1154 }
1155 *pdi = di;
1156 return TRUE;
1157 }
1158
1159 static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx,
1160 dwarf2_debug_info_t* di)
1161 {
1162 struct attribute spec;
1163
1164 while (di)
1165 {
1166 if (di->abbrev->have_child)
1167 return &di->children;
1168 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break;
1169 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue)))
1170 FIXME("Should have found the debug info entry\n");
1171 }
1172 return NULL;
1173 }
1174
1175 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
1176 dwarf2_debug_info_t* di)
1177 {
1178 struct attribute name;
1179 struct attribute size;
1180 struct attribute encoding;
1181 enum BasicType bt;
1182 int cache_idx = -1;
1183 if (di->symt) return di->symt;
1184
1185 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1186
1187 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1188 name.u.string = NULL;
1189 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1190 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
1191
1192 switch (encoding.u.uvalue)
1193 {
1194 case DW_ATE_void: bt = btVoid; break;
1195 case DW_ATE_address: bt = btULong; break;
1196 case DW_ATE_boolean: bt = btBool; break;
1197 case DW_ATE_complex_float: bt = btComplex; break;
1198 case DW_ATE_float: bt = btFloat; break;
1199 case DW_ATE_signed: bt = btInt; break;
1200 case DW_ATE_unsigned: bt = btUInt; break;
1201 case DW_ATE_signed_char: bt = btChar; break;
1202 case DW_ATE_unsigned_char: bt = btChar; break;
1203 default: bt = btNoType; break;
1204 }
1205 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
1206 switch (bt)
1207 {
1208 case btVoid:
1209 assert(size.u.uvalue == 0);
1210 cache_idx = sc_void;
1211 break;
1212 case btInt:
1213 switch (size.u.uvalue)
1214 {
1215 case 1: cache_idx = sc_int1; break;
1216 case 2: cache_idx = sc_int2; break;
1217 case 4: cache_idx = sc_int4; break;
1218 }
1219 break;
1220 default: break;
1221 }
1222 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
1223 ctx->symt_cache[cache_idx] = di->symt;
1224
1225 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1226 return di->symt;
1227 }
1228
1229 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
1230 dwarf2_debug_info_t* di)
1231 {
1232 struct symt* ref_type;
1233 struct attribute name;
1234
1235 if (di->symt) return di->symt;
1236
1237 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1238
1239 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1240 ref_type = dwarf2_lookup_type(ctx, di);
1241
1242 if (name.u.string)
1243 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1244 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1245 return di->symt;
1246 }
1247
1248 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1249 dwarf2_debug_info_t* di)
1250 {
1251 struct symt* ref_type;
1252 struct attribute size;
1253
1254 if (di->symt) return di->symt;
1255
1256 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1257
1258 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *);
1259 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1260 {
1261 ref_type = ctx->symt_cache[sc_void];
1262 assert(ref_type);
1263 }
1264 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt;
1265 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1266 return di->symt;
1267 }
1268
1269 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1270 dwarf2_debug_info_t* di)
1271 {
1272 struct symt* ref_type;
1273 struct symt* idx_type = NULL;
1274 struct attribute min, max, cnt;
1275 dwarf2_debug_info_t* child;
1276 unsigned int i;
1277 const struct vector* children;
1278
1279 if (di->symt) return di->symt;
1280
1281 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1282
1283 ref_type = dwarf2_lookup_type(ctx, di);
1284
1285 if (!(children = dwarf2_get_di_children(ctx, di)))
1286 {
1287 /* fake an array with unknown size */
1288 /* FIXME: int4 even on 64bit machines??? */
1289 idx_type = ctx->symt_cache[sc_int4];
1290 min.u.uvalue = 0;
1291 max.u.uvalue = -1;
1292 }
1293 else for (i = 0; i < vector_length(children); i++)
1294 {
1295 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1296 switch (child->abbrev->tag)
1297 {
1298 case DW_TAG_subrange_type:
1299 idx_type = dwarf2_lookup_type(ctx, child);
1300 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1301 min.u.uvalue = 0;
1302 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1303 max.u.uvalue = 0;
1304 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1305 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1306 break;
1307 default:
1308 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1309 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1310 break;
1311 }
1312 }
1313 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1314 return di->symt;
1315 }
1316
1317 static struct symt* dwarf2_parse_const_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_volatile_type(dwarf2_parse_context_t* ctx,
1338 dwarf2_debug_info_t* di)
1339 {
1340 struct symt* ref_type;
1341
1342 if (di->symt) return di->symt;
1343
1344 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1345
1346 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1347 {
1348 ref_type = ctx->symt_cache[sc_void];
1349 assert(ref_type);
1350 }
1351 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1352 di->symt = ref_type;
1353
1354 return ref_type;
1355 }
1356
1357 static struct symt* dwarf2_parse_unspecified_type(dwarf2_parse_context_t* ctx,
1358 dwarf2_debug_info_t* di)
1359 {
1360 struct attribute name;
1361 struct attribute size;
1362 struct symt_basic *basic;
1363
1364 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1365
1366 if (di->symt) return di->symt;
1367
1368 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1369 name.u.string = "void";
1370 size.u.uvalue = sizeof(void *);
1371
1372 basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue);
1373 di->symt = &basic->symt;
1374
1375 if (!ctx->symt_cache[sc_void])
1376 ctx->symt_cache[sc_void] = di->symt;
1377
1378 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1379 return di->symt;
1380 }
1381
1382 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1383 dwarf2_debug_info_t* di)
1384 {
1385 struct symt* ref_type = NULL;
1386
1387 if (di->symt) return di->symt;
1388
1389 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1390
1391 ref_type = dwarf2_lookup_type(ctx, di);
1392 /* FIXME: for now, we hard-wire C++ references to pointers */
1393 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt;
1394
1395 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1396
1397 return di->symt;
1398 }
1399
1400 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1401 dwarf2_debug_info_t* di,
1402 struct symt_udt* parent)
1403 {
1404 struct symt* elt_type;
1405 struct attribute name;
1406 struct attribute bit_size;
1407 struct attribute bit_offset;
1408 struct location loc;
1409
1410 assert(parent);
1411
1412 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1413
1414 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1415 elt_type = dwarf2_lookup_type(ctx, di);
1416 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1417 {
1418 if (loc.kind != loc_absolute)
1419 {
1420 FIXME("Found register, while not expecting it\n");
1421 loc.offset = 0;
1422 }
1423 else
1424 TRACE("found member_location at %s -> %lu\n",
1425 dwarf2_debug_ctx(ctx), loc.offset);
1426 }
1427 else
1428 loc.offset = 0;
1429 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1430 bit_size.u.uvalue = 0;
1431 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1432 {
1433 /* FIXME: we should only do this when implementation is LSB (which is
1434 * the case on i386 processors)
1435 */
1436 struct attribute nbytes;
1437 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1438 {
1439 DWORD64 size;
1440 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ?
1441 (unsigned long)size : 0;
1442 }
1443 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1444 }
1445 else bit_offset.u.uvalue = 0;
1446 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1447 (loc.offset << 3) + bit_offset.u.uvalue,
1448 bit_size.u.uvalue);
1449
1450 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1451 }
1452
1453 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1454 dwarf2_debug_info_t* di);
1455
1456 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1457 dwarf2_debug_info_t* di,
1458 enum UdtKind udt)
1459 {
1460 struct attribute name;
1461 struct attribute size;
1462 struct vector* children;
1463 dwarf2_debug_info_t*child;
1464 unsigned int i;
1465
1466 if (di->symt) return di->symt;
1467
1468 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1469
1470 /* quirk... FIXME provide real support for anonymous UDTs */
1471 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1472 name.u.string = "zz_anon_zz";
1473 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1474
1475 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string),
1476 size.u.uvalue, udt)->symt;
1477
1478 children = dwarf2_get_di_children(ctx, di);
1479 if (children) for (i = 0; i < vector_length(children); i++)
1480 {
1481 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1482
1483 switch (child->abbrev->tag)
1484 {
1485 case DW_TAG_array_type:
1486 dwarf2_parse_array_type(ctx, di);
1487 break;
1488 case DW_TAG_member:
1489 /* FIXME: should I follow the sibling stuff ?? */
1490 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1491 break;
1492 case DW_TAG_enumeration_type:
1493 dwarf2_parse_enumeration_type(ctx, child);
1494 break;
1495 case DW_TAG_subprogram:
1496 dwarf2_parse_subprogram(ctx, child);
1497 break;
1498 case DW_TAG_const_type:
1499 dwarf2_parse_const_type(ctx, child);
1500 break;
1501 case DW_TAG_structure_type:
1502 case DW_TAG_class_type:
1503 case DW_TAG_union_type:
1504 case DW_TAG_typedef:
1505 /* FIXME: we need to handle nested udt definitions */
1506 case DW_TAG_inheritance:
1507 case DW_TAG_template_type_param:
1508 case DW_TAG_template_value_param:
1509 case DW_TAG_variable:
1510 case DW_TAG_imported_declaration:
1511 case DW_TAG_ptr_to_member_type:
1512 case DW_TAG_GNU_template_parameter_pack:
1513 case DW_TAG_GNU_formal_parameter_pack:
1514 /* FIXME: some C++ related stuff */
1515 break;
1516 default:
1517 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1518 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1519 break;
1520 }
1521 }
1522
1523 return di->symt;
1524 }
1525
1526 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1527 dwarf2_debug_info_t* di,
1528 struct symt_enum* parent)
1529 {
1530 struct attribute name;
1531 struct attribute value;
1532
1533 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1534
1535 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1536 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1537 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1538
1539 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n");
1540 }
1541
1542 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1543 dwarf2_debug_info_t* di)
1544 {
1545 struct attribute name;
1546 struct attribute size;
1547 struct symt_basic* basetype;
1548 struct vector* children;
1549 dwarf2_debug_info_t*child;
1550 unsigned int i;
1551
1552 if (di->symt) return di->symt;
1553
1554 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1555
1556 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1557 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1558
1559 switch (size.u.uvalue) /* FIXME: that's wrong */
1560 {
1561 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1562 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1563 default:
1564 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1565 }
1566
1567 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1568
1569 children = dwarf2_get_di_children(ctx, di);
1570 /* FIXME: should we use the sibling stuff ?? */
1571 if (children) for (i = 0; i < vector_length(children); i++)
1572 {
1573 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1574
1575 switch (child->abbrev->tag)
1576 {
1577 case DW_TAG_enumerator:
1578 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1579 break;
1580 default:
1581 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1582 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1583 }
1584 }
1585 return di->symt;
1586 }
1587
1588 /* structure used to pass information around when parsing a subprogram */
1589 typedef struct dwarf2_subprogram_s
1590 {
1591 dwarf2_parse_context_t* ctx;
1592 struct symt_function* func;
1593 BOOL non_computed_variable;
1594 struct location frame;
1595 } dwarf2_subprogram_t;
1596
1597 /******************************************************************
1598 * dwarf2_parse_variable
1599 *
1600 * Parses any variable (parameter, local/global variable)
1601 */
1602 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1603 struct symt_block* block,
1604 dwarf2_debug_info_t* di)
1605 {
1606 struct symt* param_type;
1607 struct attribute name, value;
1608 struct location loc;
1609 BOOL is_pmt;
1610
1611 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1612
1613 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1614 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1615
1616 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1617 /* cannot do much without the name, the functions below won't like it. */
1618 return;
1619 }
1620 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1621 &loc, &subpgm->frame))
1622 {
1623 struct attribute ext;
1624
1625 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1626 name.u.string, loc.kind, loc.offset, loc.reg,
1627 dwarf2_debug_ctx(subpgm->ctx));
1628
1629 switch (loc.kind)
1630 {
1631 case loc_error:
1632 break;
1633 case loc_absolute:
1634 /* it's a global variable */
1635 /* FIXME: we don't handle its scope yet */
1636 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1637 ext.u.uvalue = 0;
1638 loc.offset += subpgm->ctx->load_offset;
1639 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland,
1640 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue,
1641 loc, 0, param_type);
1642 break;
1643 default:
1644 subpgm->non_computed_variable = TRUE;
1645 /* fall through */
1646 case loc_register:
1647 case loc_regrel:
1648 /* either a pmt/variable relative to frame pointer or
1649 * pmt/variable in a register
1650 */
1651 assert(subpgm->func);
1652 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1653 is_pmt ? DataIsParam : DataIsLocal,
1654 &loc, block, param_type, name.u.string);
1655 break;
1656 }
1657 }
1658 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1659 {
1660 VARIANT v;
1661 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1662 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1663 switch (value.form)
1664 {
1665 case DW_FORM_data1:
1666 case DW_FORM_data2:
1667 case DW_FORM_data4:
1668 case DW_FORM_udata:
1669 case DW_FORM_addr:
1670 v.n1.n2.vt = VT_UI4;
1671 v.n1.n2.n3.lVal = value.u.uvalue;
1672 break;
1673
1674 case DW_FORM_data8:
1675 v.n1.n2.vt = VT_UI8;
1676 v.n1.n2.n3.llVal = value.u.lluvalue;
1677 break;
1678
1679 case DW_FORM_sdata:
1680 v.n1.n2.vt = VT_I4;
1681 v.n1.n2.n3.lVal = value.u.svalue;
1682 break;
1683
1684 case DW_FORM_strp:
1685 case DW_FORM_string:
1686 /* FIXME: native doesn't report const strings from here !!
1687 * however, the value of the string is in the code somewhere
1688 */
1689 v.n1.n2.vt = VT_I1 | VT_BYREF;
1690 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1691 break;
1692
1693 case DW_FORM_block:
1694 case DW_FORM_block1:
1695 case DW_FORM_block2:
1696 case DW_FORM_block4:
1697 v.n1.n2.vt = VT_I4;
1698 switch (value.u.block.size)
1699 {
1700 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break;
1701 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break;
1702 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break;
1703 default:
1704 v.n1.n2.vt = VT_I1 | VT_BYREF;
1705 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size);
1706 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size);
1707 }
1708 break;
1709
1710 default:
1711 FIXME("Unsupported form for const value %s (%lx)\n",
1712 name.u.string, value.form);
1713 v.n1.n2.vt = VT_EMPTY;
1714 }
1715 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland,
1716 name.u.string, param_type, &v)->symt;
1717 }
1718 else
1719 {
1720 /* variable has been optimized away... report anyway */
1721 loc.kind = loc_error;
1722 loc.reg = loc_err_no_location;
1723 if (subpgm->func)
1724 {
1725 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1726 is_pmt ? DataIsParam : DataIsLocal,
1727 &loc, block, param_type, name.u.string);
1728 }
1729 else
1730 {
1731 WARN("dropping global variable %s which has been optimized away\n", name.u.string);
1732 }
1733 }
1734 if (is_pmt && subpgm->func && subpgm->func->type)
1735 symt_add_function_signature_parameter(subpgm->ctx->module,
1736 (struct symt_function_signature*)subpgm->func->type,
1737 param_type);
1738
1739 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n");
1740 }
1741
1742 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1743 const dwarf2_debug_info_t* di)
1744 {
1745 struct attribute name;
1746 struct attribute low_pc;
1747 struct location loc;
1748
1749 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1750
1751 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1752 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1753 name.u.string = NULL;
1754
1755 loc.kind = loc_absolute;
1756 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1757 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1758 &loc, name.u.string);
1759 }
1760
1761 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1762 struct symt_block* parent_block,
1763 dwarf2_debug_info_t* di);
1764
1765 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1766 dwarf2_debug_info_t* di);
1767
1768 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1769 struct symt_block* parent_block,
1770 dwarf2_debug_info_t* di)
1771 {
1772 struct symt_block* block;
1773 unsigned long low_pc, high_pc;
1774 struct vector* children;
1775 dwarf2_debug_info_t*child;
1776 unsigned int i;
1777
1778 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1779
1780 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1781 {
1782 FIXME("cannot read range\n");
1783 return;
1784 }
1785
1786 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1787 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1788 high_pc - low_pc);
1789
1790 children = dwarf2_get_di_children(subpgm->ctx, di);
1791 if (children) for (i = 0; i < vector_length(children); i++)
1792 {
1793 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1794
1795 switch (child->abbrev->tag)
1796 {
1797 case DW_TAG_formal_parameter:
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_inlined_subroutine:
1805 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1806 break;
1807 case DW_TAG_label:
1808 dwarf2_parse_subprogram_label(subpgm, child);
1809 break;
1810 case DW_TAG_GNU_call_site:
1811 /* this isn't properly supported by dbghelp interface. skip it for now */
1812 break;
1813 default:
1814 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1815 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1816 dwarf2_debug_di(di));
1817 }
1818 }
1819 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1820 }
1821
1822 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1823 struct symt_block* parent_block,
1824 dwarf2_debug_info_t* di)
1825 {
1826 struct symt_block* block;
1827 unsigned long low_pc, high_pc;
1828 struct vector* children;
1829 dwarf2_debug_info_t*child;
1830 unsigned int i;
1831
1832 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1833
1834 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc))
1835 {
1836 WARN("no range\n");
1837 return;
1838 }
1839
1840 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1841 subpgm->ctx->load_offset + low_pc - subpgm->func->address,
1842 high_pc - low_pc);
1843
1844 children = dwarf2_get_di_children(subpgm->ctx, di);
1845 if (children) for (i = 0; i < vector_length(children); i++)
1846 {
1847 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1848
1849 switch (child->abbrev->tag)
1850 {
1851 case DW_TAG_inlined_subroutine:
1852 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1853 break;
1854 case DW_TAG_variable:
1855 dwarf2_parse_variable(subpgm, block, child);
1856 break;
1857 case DW_TAG_pointer_type:
1858 dwarf2_parse_pointer_type(subpgm->ctx, di);
1859 break;
1860 case DW_TAG_subroutine_type:
1861 dwarf2_parse_subroutine_type(subpgm->ctx, di);
1862 break;
1863 case DW_TAG_const_type:
1864 dwarf2_parse_const_type(subpgm->ctx, di);
1865 break;
1866 case DW_TAG_lexical_block:
1867 dwarf2_parse_subprogram_block(subpgm, block, child);
1868 break;
1869 case DW_TAG_subprogram:
1870 /* FIXME: likely a declaration (to be checked)
1871 * skip it for now
1872 */
1873 break;
1874 case DW_TAG_formal_parameter:
1875 /* FIXME: likely elements for exception handling (GCC flavor)
1876 * Skip it for now
1877 */
1878 break;
1879 case DW_TAG_imported_module:
1880 /* C++ stuff to be silenced (for now) */
1881 break;
1882 case DW_TAG_GNU_call_site:
1883 /* this isn't properly supported by dbghelp interface. skip it for now */
1884 break;
1885 case DW_TAG_label:
1886 dwarf2_parse_subprogram_label(subpgm, child);
1887 break;
1888 case DW_TAG_class_type:
1889 case DW_TAG_structure_type:
1890 case DW_TAG_union_type:
1891 case DW_TAG_enumeration_type:
1892 case DW_TAG_typedef:
1893 /* the type referred to will be loaded when we need it, so skip it */
1894 break;
1895 default:
1896 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1897 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1898 }
1899 }
1900
1901 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1902 }
1903
1904 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1905 dwarf2_debug_info_t* di)
1906 {
1907 struct attribute name;
1908 unsigned long low_pc, high_pc;
1909 struct attribute is_decl;
1910 struct attribute inline_flags;
1911 struct symt* ret_type;
1912 struct symt_function_signature* sig_type;
1913 dwarf2_subprogram_t subpgm;
1914 struct vector* children;
1915 dwarf2_debug_info_t* child;
1916 unsigned int i;
1917
1918 if (di->symt) return di->symt;
1919
1920 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1921
1922 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1923 {
1924 WARN("No name for function... dropping function\n");
1925 return NULL;
1926 }
1927 /* if it's an abstract representation of an inline function, there should be
1928 * a concrete object that we'll handle
1929 */
1930 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) &&
1931 inline_flags.u.uvalue != DW_INL_not_inlined)
1932 {
1933 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1934 debugstr_a(name.u.string), inline_flags.u.uvalue);
1935 return NULL;
1936 }
1937
1938 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) &&
1939 is_decl.u.uvalue && is_decl.gotten_from == attr_direct)
1940 {
1941 /* it's a real declaration, skip it */
1942 return NULL;
1943 }
1944 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc))
1945 {
1946 WARN("cannot get range for %s\n", name.u.string);
1947 return NULL;
1948 }
1949 /* As functions (defined as inline assembly) get debug info with dwarf
1950 * (not the case for stabs), we just drop Wine's thunks here...
1951 * Actual thunks will be created in elf_module from the symbol table
1952 */
1953 #ifndef DBGHELP_STATIC_LIB
1954 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0)
1955 return NULL;
1956 #endif
1957 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1958 {
1959 ret_type = ctx->symt_cache[sc_void];
1960 assert(ret_type);
1961 }
1962 /* FIXME: assuming C source code */
1963 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1964 subpgm.func = symt_new_function(ctx->module, ctx->compiland,
1965 dwarf2_get_cpp_name(ctx, di, name.u.string),
1966 ctx->load_offset + low_pc, high_pc - low_pc,
1967 &sig_type->symt);
1968 di->symt = &subpgm.func->symt;
1969 subpgm.ctx = ctx;
1970 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1971 &subpgm.frame, NULL))
1972 {
1973 /* on stack !! */
1974 subpgm.frame.kind = loc_regrel;
1975 subpgm.frame.reg = dbghelp_current_cpu->frame_regno;
1976 subpgm.frame.offset = 0;
1977 }
1978 subpgm.non_computed_variable = FALSE;
1979
1980 children = dwarf2_get_di_children(ctx, di);
1981 if (children) for (i = 0; i < vector_length(children); i++)
1982 {
1983 child = *(dwarf2_debug_info_t**)vector_at(children, i);
1984
1985 switch (child->abbrev->tag)
1986 {
1987 case DW_TAG_variable:
1988 case DW_TAG_formal_parameter:
1989 dwarf2_parse_variable(&subpgm, NULL, child);
1990 break;
1991 case DW_TAG_lexical_block:
1992 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1993 break;
1994 case DW_TAG_inlined_subroutine:
1995 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1996 break;
1997 case DW_TAG_pointer_type:
1998 dwarf2_parse_pointer_type(subpgm.ctx, di);
1999 break;
2000 case DW_TAG_const_type:
2001 dwarf2_parse_const_type(subpgm.ctx, di);
2002 break;
2003 case DW_TAG_subprogram:
2004 /* FIXME: likely a declaration (to be checked)
2005 * skip it for now
2006 */
2007 break;
2008 case DW_TAG_label:
2009 dwarf2_parse_subprogram_label(&subpgm, child);
2010 break;
2011 case DW_TAG_class_type:
2012 case DW_TAG_structure_type:
2013 case DW_TAG_union_type:
2014 case DW_TAG_enumeration_type:
2015 case DW_TAG_typedef:
2016 /* the type referred to will be loaded when we need it, so skip it */
2017 break;
2018 case DW_TAG_unspecified_parameters:
2019 case DW_TAG_template_type_param:
2020 case DW_TAG_template_value_param:
2021 case DW_TAG_GNU_call_site:
2022 case DW_TAG_GNU_template_parameter_pack:
2023 case DW_TAG_GNU_formal_parameter_pack:
2024 /* FIXME: no support in dbghelp's internals so far */
2025 break;
2026 default:
2027 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
2028 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2029 }
2030 }
2031
2032 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
2033 {
2034 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
2035 &subpgm.frame, NULL);
2036 }
2037 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
2038
2039 return di->symt;
2040 }
2041
2042 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
2043 dwarf2_debug_info_t* di)
2044 {
2045 struct symt* ret_type;
2046 struct symt_function_signature* sig_type;
2047 struct vector* children;
2048 dwarf2_debug_info_t* child;
2049 unsigned int i;
2050
2051 if (di->symt) return di->symt;
2052
2053 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2054
2055 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
2056 {
2057 ret_type = ctx->symt_cache[sc_void];
2058 assert(ret_type);
2059 }
2060
2061 /* FIXME: assuming C source code */
2062 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
2063
2064 children = dwarf2_get_di_children(ctx, di);
2065 if (children) for (i = 0; i < vector_length(children); i++)
2066 {
2067 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2068
2069 switch (child->abbrev->tag)
2070 {
2071 case DW_TAG_formal_parameter:
2072 symt_add_function_signature_parameter(ctx->module, sig_type,
2073 dwarf2_lookup_type(ctx, child));
2074 break;
2075 case DW_TAG_unspecified_parameters:
2076 WARN("Unsupported unspecified parameters\n");
2077 break;
2078 }
2079 }
2080
2081 return di->symt = &sig_type->symt;
2082 }
2083
2084 static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx,
2085 dwarf2_debug_info_t* di)
2086 {
2087 struct vector* children;
2088 dwarf2_debug_info_t* child;
2089 unsigned int i;
2090
2091 if (di->symt) return;
2092
2093 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
2094
2095 di->symt = ctx->symt_cache[sc_void];
2096
2097 children = dwarf2_get_di_children(ctx, di);
2098 if (children) for (i = 0; i < vector_length(children); i++)
2099 {
2100 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2101 dwarf2_load_one_entry(ctx, child);
2102 }
2103 }
2104
2105 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
2106 dwarf2_debug_info_t* di)
2107 {
2108 switch (di->abbrev->tag)
2109 {
2110 case DW_TAG_typedef:
2111 dwarf2_parse_typedef(ctx, di);
2112 break;
2113 case DW_TAG_base_type:
2114 dwarf2_parse_base_type(ctx, di);
2115 break;
2116 case DW_TAG_pointer_type:
2117 dwarf2_parse_pointer_type(ctx, di);
2118 break;
2119 case DW_TAG_class_type:
2120 dwarf2_parse_udt_type(ctx, di, UdtClass);
2121 break;
2122 case DW_TAG_structure_type:
2123 dwarf2_parse_udt_type(ctx, di, UdtStruct);
2124 break;
2125 case DW_TAG_union_type:
2126 dwarf2_parse_udt_type(ctx, di, UdtUnion);
2127 break;
2128 case DW_TAG_array_type:
2129 dwarf2_parse_array_type(ctx, di);
2130 break;
2131 case DW_TAG_const_type:
2132 dwarf2_parse_const_type(ctx, di);
2133 break;
2134 case DW_TAG_volatile_type:
2135 dwarf2_parse_volatile_type(ctx, di);
2136 break;
2137 case DW_TAG_unspecified_type:
2138 dwarf2_parse_unspecified_type(ctx, di);
2139 break;
2140 case DW_TAG_reference_type:
2141 dwarf2_parse_reference_type(ctx, di);
2142 break;
2143 case DW_TAG_enumeration_type:
2144 dwarf2_parse_enumeration_type(ctx, di);
2145 break;
2146 case DW_TAG_subprogram:
2147 dwarf2_parse_subprogram(ctx, di);
2148 break;
2149 case DW_TAG_subroutine_type:
2150 dwarf2_parse_subroutine_type(ctx, di);
2151 break;
2152 case DW_TAG_variable:
2153 {
2154 dwarf2_subprogram_t subpgm;
2155
2156 subpgm.ctx = ctx;
2157 subpgm.func = NULL;
2158 subpgm.frame.kind = loc_absolute;
2159 subpgm.frame.offset = 0;
2160 subpgm.frame.reg = Wine_DW_no_register;
2161 dwarf2_parse_variable(&subpgm, NULL, di);
2162 }
2163 break;
2164 case DW_TAG_namespace:
2165 dwarf2_parse_namespace(ctx, di);
2166 break;
2167 /* silence a couple of C++ defines */
2168 case DW_TAG_imported_module:
2169 case DW_TAG_imported_declaration:
2170 case DW_TAG_ptr_to_member_type:
2171 break;
2172 default:
2173 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
2174 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
2175 }
2176 }
2177
2178 static void dwarf2_set_line_number(struct module* module, unsigned long address,
2179 const struct vector* v, unsigned file, unsigned line)
2180 {
2181 struct symt_function* func;
2182 struct symt_ht* symt;
2183 unsigned* psrc;
2184
2185 if (!file || !(psrc = vector_at(v, file - 1))) return;
2186
2187 TRACE("%s %lx %s %u\n",
2188 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
2189 if (!(symt = symt_find_nearest(module, address)) ||
2190 symt->symt.tag != SymTagFunction) return;
2191 func = (struct symt_function*)symt;
2192 symt_add_func_line(module, func, *psrc, line, address - func->address);
2193 }
2194
2195 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
2196 dwarf2_parse_context_t* ctx,
2197 const char* compile_dir,
2198 unsigned long offset)
2199 {
2200 dwarf2_traverse_context_t traverse;
2201 unsigned long length;
2202 unsigned insn_size, default_stmt;
2203 unsigned line_range, opcode_base;
2204 int line_base;
2205 const unsigned char* opcode_len;
2206 struct vector dirs;
2207 struct vector files;
2208 const char** p;
2209
2210 /* section with line numbers stripped */
2211 if (sections[section_line].address == IMAGE_NO_MAP)
2212 return FALSE;
2213
2214 if (offset + 4 > sections[section_line].size)
2215 {
2216 WARN("out of bounds offset\n");
2217 return FALSE;
2218 }
2219 traverse.data = sections[section_line].address + offset;
2220 traverse.end_data = traverse.data + 4;
2221 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size;
2222
2223 length = dwarf2_parse_u4(&traverse);
2224 traverse.end_data = sections[section_line].address + offset + length;
2225
2226 if (offset + 4 + length > sections[section_line].size)
2227 {
2228 WARN("out of bounds header\n");
2229 return FALSE;
2230 }
2231 dwarf2_parse_u2(&traverse); /* version */
2232 dwarf2_parse_u4(&traverse); /* header_len */
2233 insn_size = dwarf2_parse_byte(&traverse);
2234 default_stmt = dwarf2_parse_byte(&traverse);
2235 line_base = (signed char)dwarf2_parse_byte(&traverse);
2236 line_range = dwarf2_parse_byte(&traverse);
2237 opcode_base = dwarf2_parse_byte(&traverse);
2238
2239 opcode_len = traverse.data;
2240 traverse.data += opcode_base - 1;
2241
2242 vector_init(&dirs, sizeof(const char*), 4);
2243 p = vector_add(&dirs, &ctx->pool);
2244 *p = compile_dir ? compile_dir : ".";
2245 while (*traverse.data)
2246 {
2247 const char* rel = (const char*)traverse.data;
2248 unsigned rellen = strlen(rel);
2249 TRACE("Got include %s\n", rel);
2250 traverse.data += rellen + 1;
2251 p = vector_add(&dirs, &ctx->pool);
2252
2253 if (*rel == '/' || !compile_dir)
2254 *p = rel;
2255 else
2256 {
2257 /* include directory relative to compile directory */
2258 unsigned baselen = strlen(compile_dir);
2259 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
2260 strcpy(tmp, compile_dir);
2261 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
2262 strcpy(&tmp[baselen], rel);
2263 *p = tmp;
2264 }
2265
2266 }
2267 traverse.data++;
2268
2269 vector_init(&files, sizeof(unsigned), 16);
2270 while (*traverse.data)
2271 {
2272 unsigned int dir_index, mod_time;
2273 const char* name;
2274 const char* dir;
2275 unsigned* psrc;
2276
2277 name = (const char*)traverse.data;
2278 traverse.data += strlen(name) + 1;
2279 dir_index = dwarf2_leb128_as_unsigned(&traverse);
2280 mod_time = dwarf2_leb128_as_unsigned(&traverse);
2281 length = dwarf2_leb128_as_unsigned(&traverse);
2282 dir = *(const char**)vector_at(&dirs, dir_index);
2283 TRACE("Got file %s/%s (%u,%lu)\n", dir, name, mod_time, length);
2284 psrc = vector_add(&files, &ctx->pool);
2285 *psrc = source_new(ctx->module, dir, name);
2286 }
2287 traverse.data++;
2288
2289 while (traverse.data < traverse.end_data)
2290 {
2291 unsigned long address = 0;
2292 unsigned file = 1;
2293 unsigned line = 1;
2294 unsigned is_stmt = default_stmt;
2295 BOOL end_sequence = FALSE;
2296 unsigned opcode, extopcode, i;
2297
2298 while (!end_sequence)
2299 {
2300 opcode = dwarf2_parse_byte(&traverse);
2301 TRACE("Got opcode %x\n", opcode);
2302
2303 if (opcode >= opcode_base)
2304 {
2305 unsigned delta = opcode - opcode_base;
2306
2307 address += (delta / line_range) * insn_size;
2308 line += line_base + (delta % line_range);
2309 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2310 }
2311 else
2312 {
2313 switch (opcode)
2314 {
2315 case DW_LNS_copy:
2316 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2317 break;
2318 case DW_LNS_advance_pc:
2319 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
2320 break;
2321 case DW_LNS_advance_line:
2322 line += dwarf2_leb128_as_signed(&traverse);
2323 break;
2324 case DW_LNS_set_file:
2325 file = dwarf2_leb128_as_unsigned(&traverse);
2326 break;
2327 case DW_LNS_set_column:
2328 dwarf2_leb128_as_unsigned(&traverse);
2329 break;
2330 case DW_LNS_negate_stmt:
2331 is_stmt = !is_stmt;
2332 break;
2333 case DW_LNS_set_basic_block:
2334 break;
2335 case DW_LNS_const_add_pc:
2336 address += ((255 - opcode_base) / line_range) * insn_size;
2337 break;
2338 case DW_LNS_fixed_advance_pc:
2339 address += dwarf2_parse_u2(&traverse);
2340 break;
2341 case DW_LNS_extended_op:
2342 dwarf2_leb128_as_unsigned(&traverse);
2343 extopcode = dwarf2_parse_byte(&traverse);
2344 switch (extopcode)
2345 {
2346 case DW_LNE_end_sequence:
2347 dwarf2_set_line_number(ctx->module, address, &files, file, line);
2348 end_sequence = TRUE;
2349 break;
2350 case DW_LNE_set_address:
2351 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
2352 break;
2353 case DW_LNE_define_file:
2354 FIXME("not handled define file %s\n", traverse.data);
2355 traverse.data += strlen((const char *)traverse.data) + 1;
2356 dwarf2_leb128_as_unsigned(&traverse);
2357 dwarf2_leb128_as_unsigned(&traverse);
2358 dwarf2_leb128_as_unsigned(&traverse);
2359 break;
2360 case DW_LNE_set_discriminator:
2361 {
2362 unsigned descr;
2363
2364 descr = dwarf2_leb128_as_unsigned(&traverse);
2365 WARN("not handled discriminator %x\n", descr);
2366 }
2367 break;
2368 default:
2369 FIXME("Unsupported extended opcode %x\n", extopcode);
2370 break;
2371 }
2372 break;
2373 default:
2374 WARN("Unsupported opcode %x\n", opcode);
2375 for (i = 0; i < opcode_len[opcode]; i++)
2376 dwarf2_leb128_as_unsigned(&traverse);
2377 break;
2378 }
2379 }
2380 }
2381 }
2382 return TRUE;
2383 }
2384
2385 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
2386 struct module* module,
2387 const struct elf_thunk_area* thunks,
2388 dwarf2_traverse_context_t* mod_ctx,
2389 unsigned long load_offset)
2390 {
2391 dwarf2_parse_context_t ctx;
2392 dwarf2_traverse_context_t abbrev_ctx;
2393 dwarf2_debug_info_t* di;
2394 dwarf2_traverse_context_t cu_ctx;
2395 const unsigned char* comp_unit_start = mod_ctx->data;
2396 unsigned long cu_length;
2397 unsigned short cu_version;
2398 unsigned long cu_abbrev_offset;
2399 BOOL ret = FALSE;
2400
2401 cu_length = dwarf2_parse_u4(mod_ctx);
2402 cu_ctx.data = mod_ctx->data;
2403 cu_ctx.end_data = mod_ctx->data + cu_length;
2404 mod_ctx->data += cu_length;
2405 cu_version = dwarf2_parse_u2(&cu_ctx);
2406 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2407 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2408
2409 TRACE("Compilation Unit Header found at 0x%x:\n",
2410 (int)(comp_unit_start - sections[section_debug].address));
2411 TRACE("- length: %lu\n", cu_length);
2412 TRACE("- version: %u\n", cu_version);
2413 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2414 TRACE("- word_size: %u\n", cu_ctx.word_size);
2415
2416 if (cu_version != 2)
2417 {
2418 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2419 cu_version);
2420 return FALSE;
2421 }
2422
2423 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size;
2424 mod_ctx->word_size = cu_ctx.word_size;
2425
2426 pool_init(&ctx.pool, 65536);
2427 ctx.sections = sections;
2428 ctx.section = section_debug;
2429 ctx.module = module;
2430 ctx.thunks = thunks;
2431 ctx.load_offset = load_offset;
2432 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2433 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2434 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2435 ctx.cpp_name = NULL;
2436
2437 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset;
2438 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2439 abbrev_ctx.word_size = cu_ctx.word_size;
2440 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2441
2442 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2443 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di);
2444
2445 if (di->abbrev->tag == DW_TAG_compile_unit)
2446 {
2447 struct attribute name;
2448 struct vector* children;
2449 dwarf2_debug_info_t* child = NULL;
2450 unsigned int i;
2451 struct attribute stmt_list, low_pc;
2452 struct attribute comp_dir;
2453
2454 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2455 name.u.string = NULL;
2456
2457 /* get working directory of current compilation unit */
2458 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2459 comp_dir.u.string = NULL;
2460
2461 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2462 low_pc.u.uvalue = 0;
2463 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue,
2464 source_new(module, comp_dir.u.string, name.u.string));
2465 di->symt = &ctx.compiland->symt;
2466 children = dwarf2_get_di_children(&ctx, di);
2467 if (children) for (i = 0; i < vector_length(children); i++)
2468 {
2469 child = *(dwarf2_debug_info_t**)vector_at(children, i);
2470 dwarf2_load_one_entry(&ctx, child);
2471 }
2472 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2473 {
2474 #if defined(__REACTOS__) && defined(__clang__)
2475 unsigned long stmt_list_val = stmt_list.u.uvalue;
2476 if (stmt_list_val > module->module.BaseOfImage)
2477 {
2478 /* FIXME: Clang is recording this as an address, not an offset */
2479 stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva;
2480 }
2481 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val))
2482 #else
2483 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2484 #endif
2485 module->module.LineNumbers = TRUE;
2486 }
2487 ret = TRUE;
2488 }
2489 else FIXME("Should have a compilation unit here\n");
2490 pool_destroy(&ctx.pool);
2491 return ret;
2492 }
2493
2494 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start,
2495 unsigned long ip, dwarf2_traverse_context_t* lctx)
2496 {
2497 DWORD_PTR beg, end;
2498 const BYTE* ptr = start;
2499 DWORD len;
2500
2501 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size)
2502 {
2503 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2504 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size;
2505 if (!beg && !end) break;
2506 len = dwarf2_get_u2(ptr); ptr += 2;
2507
2508 if (beg <= ip && ip < end)
2509 {
2510 lctx->data = ptr;
2511 lctx->end_data = ptr + len;
2512 lctx->word_size = modfmt->u.dwarf2_info->word_size;
2513 return TRUE;
2514 }
2515 ptr += len;
2516 }
2517 WARN("Couldn't find ip in location list\n");
2518 return FALSE;
2519 }
2520
2521 static enum location_error loc_compute_frame(struct process* pcs,
2522 const struct module_format* modfmt,
2523 const struct symt_function* func,
2524 DWORD_PTR ip, struct location* frame)
2525 {
2526 struct symt** psym = NULL;
2527 struct location* pframe;
2528 dwarf2_traverse_context_t lctx;
2529 enum location_error err;
2530 unsigned int i;
2531
2532 for (i=0; i<vector_length(&func->vchildren); i++)
2533 {
2534 psym = vector_at(&func->vchildren, i);
2535 if ((*psym)->tag == SymTagCustom)
2536 {
2537 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2538
2539 /* First, recompute the frame information, if needed */
2540 switch (pframe->kind)
2541 {
2542 case loc_regrel:
2543 case loc_register:
2544 *frame = *pframe;
2545 break;
2546 case loc_dwarf2_location_list:
2547 WARN("Searching loclist for %s\n", func->hash_elt.name);
2548 if (!dwarf2_lookup_loclist(modfmt,
2549 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset,
2550 ip, &lctx))
2551 return loc_err_out_of_scope;
2552 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2553 if (frame->kind >= loc_user)
2554 {
2555 WARN("Couldn't compute runtime frame location\n");
2556 return loc_err_too_complex;
2557 }
2558 break;
2559 default:
2560 WARN("Unsupported frame kind %d\n", pframe->kind);
2561 return loc_err_internal;
2562 }
2563 return 0;
2564 }
2565 }
2566 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2567 return loc_err_internal;
2568 }
2569
2570 enum reg_rule
2571 {
2572 RULE_UNSET, /* not set at all */
2573 RULE_UNDEFINED, /* undefined value */
2574 RULE_SAME, /* same value as previous frame */
2575 RULE_CFA_OFFSET, /* stored at cfa offset */
2576 RULE_OTHER_REG, /* stored in other register */
2577 RULE_EXPRESSION, /* address specified by expression */
2578 RULE_VAL_EXPRESSION /* value specified by expression */
2579 };
2580
2581 /* make it large enough for all CPUs */
2582 #define NB_FRAME_REGS 64
2583 #define MAX_SAVED_STATES 16
2584
2585 struct frame_state
2586 {
2587 ULONG_PTR cfa_offset;
2588 unsigned char cfa_reg;
2589 enum reg_rule cfa_rule;
2590 enum reg_rule rules[NB_FRAME_REGS];
2591 ULONG_PTR regs[NB_FRAME_REGS];
2592 };
2593
2594 struct frame_info
2595 {
2596 ULONG_PTR ip;
2597 ULONG_PTR code_align;
2598 LONG_PTR data_align;
2599 unsigned char retaddr_reg;
2600 unsigned char fde_encoding;
2601 unsigned char lsda_encoding;
2602 unsigned char signal_frame;
2603 unsigned char aug_z_format;
2604 unsigned char state_sp;
2605 struct frame_state state;
2606 struct frame_state state_stack[MAX_SAVED_STATES];
2607 };
2608
2609 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding)
2610 {
2611 ULONG_PTR base;
2612
2613 if (encoding == DW_EH_PE_omit) return 0;
2614
2615 switch (encoding & 0xf0)
2616 {
2617 case DW_EH_PE_abs:
2618 base = 0;
2619 break;
2620 case DW_EH_PE_pcrel:
2621 base = (ULONG_PTR)ctx->data;
2622 break;
2623 default:
2624 FIXME("unsupported encoding %02x\n", encoding);
2625 return 0;
2626 }
2627
2628 switch (encoding & 0x0f)
2629 {
2630 case DW_EH_PE_native:
2631 return base + dwarf2_parse_addr(ctx);
2632 case DW_EH_PE_leb128:
2633 return base + dwarf2_leb128_as_unsigned(ctx);
2634 case DW_EH_PE_data2:
2635 return base + dwarf2_parse_u2(ctx);
2636 case DW_EH_PE_data4:
2637 return base + dwarf2_parse_u4(ctx);
2638 case DW_EH_PE_data8:
2639 return base + dwarf2_parse_u8(ctx);
2640 case DW_EH_PE_signed|DW_EH_PE_leb128:
2641 return base + dwarf2_leb128_as_signed(ctx);
2642 case DW_EH_PE_signed|DW_EH_PE_data2:
2643 return base + (signed short)dwarf2_parse_u2(ctx);
2644 case DW_EH_PE_signed|DW_EH_PE_data4:
2645 return base + (signed int)dwarf2_parse_u4(ctx);
2646 case DW_EH_PE_signed|DW_EH_PE_data8:
2647 return base + (LONG64)dwarf2_parse_u8(ctx);
2648 default:
2649 FIXME("unsupported encoding %02x\n", encoding);
2650 return 0;
2651 }
2652 }
2653
2654 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info)
2655 {
2656 unsigned char version;
2657 const char* augmentation;
2658 const unsigned char* end;
2659 ULONG_PTR len;
2660
2661 memset(info, 0, sizeof(*info));
2662 info->lsda_encoding = DW_EH_PE_omit;
2663 info->aug_z_format = 0;
2664
2665 /* parse the CIE first */
2666 version = dwarf2_parse_byte(ctx);
2667 if (version != 1 && version != 3 && version != 4)
2668 {
2669 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1);
2670 return FALSE;
2671 }
2672 augmentation = (const char*)ctx->data;
2673 ctx->data += strlen(augmentation) + 1;
2674
2675 switch (version)
2676 {
2677 case 4:
2678 /* skip 'address_size' and 'segment_size' */
2679 ctx->data += 2;
2680 /* fallthrough */
2681 case 1:
2682 case 3:
2683 info->code_align = dwarf2_leb128_as_unsigned(ctx);
2684 info->data_align = dwarf2_leb128_as_signed(ctx);
2685 info->retaddr_reg = version == 1 ? dwarf2_parse_byte(ctx) :dwarf2_leb128_as_unsigned(ctx);
2686 break;
2687 default:
2688 ;
2689 }
2690 info->state.cfa_rule = RULE_CFA_OFFSET;
2691
2692 end = NULL;
2693 TRACE("\tparsing augmentation %s\n", augmentation);
2694 if (*augmentation) do
2695 {
2696 switch (*augmentation)
2697 {
2698 case 'z':
2699 len = dwarf2_leb128_as_unsigned(ctx);
2700 end = ctx->data + len;
2701 info->aug_z_format = 1;
2702 continue;
2703 case 'L':
2704 info->lsda_encoding = dwarf2_parse_byte(ctx);
2705 continue;
2706 case 'P':
2707 {
2708 unsigned char encoding = dwarf2_parse_byte(ctx);
2709 /* throw away the indirect bit, as we don't care for the result */
2710 encoding &= ~DW_EH_PE_indirect;
2711 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */
2712 continue;
2713 }
2714 case 'R':
2715 info->fde_encoding = dwarf2_parse_byte(ctx);
2716 continue;
2717 case 'S':
2718 info->signal_frame = 1;
2719 continue;
2720 }
2721 FIXME("unknown augmentation '%c'\n", *augmentation);
2722 if (!end) return FALSE;
2723 break;
2724 } while (*++augmentation);
2725 if (end) ctx->data = end;
2726 return TRUE;
2727 }
2728
2729 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta,
2730 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx,
2731 struct frame_info* info, BOOL in_eh_frame)
2732 {
2733 const unsigned char* ptr_blk;
2734 const unsigned char* cie_ptr;
2735 const unsigned char* last_cie_ptr = (const unsigned char*)~0;
2736 unsigned len, id;
2737 unsigned long start, range;
2738 unsigned cie_id;
2739 const BYTE* start_data = fde_ctx->data;
2740
2741 cie_id = in_eh_frame ? 0 : DW_CIE_ID;
2742 /* skip 0-padding at beginning of section (alignment) */
2743 while (fde_ctx->data + 2 * 4 < fde_ctx->end_data)
2744 {
2745 if (dwarf2_parse_u4(fde_ctx))
2746 {
2747 fde_ctx->data -= 4;
2748 break;
2749 }
2750 }
2751 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk)
2752 {
2753 /* find the FDE for address addr (skip CIE) */
2754 len = dwarf2_parse_u4(fde_ctx);
2755 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n");
2756 ptr_blk = fde_ctx->data + len;
2757 id = dwarf2_parse_u4(fde_ctx);
2758 if (id == cie_id)
2759 {
2760 last_cie_ptr = fde_ctx->data - 8;
2761 /* we need some bits out of the CIE in order to parse all contents */
2762 if (!parse_cie_details(fde_ctx, info)) return FALSE;
2763 cie_ctx->data = fde_ctx->data;
2764 cie_ctx->end_data = ptr_blk;
2765 cie_ctx->word_size = fde_ctx->word_size;
2766 continue;
2767 }
2768 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id;
2769 if (cie_ptr != last_cie_ptr)
2770 {
2771 last_cie_ptr = cie_ptr;
2772 cie_ctx->data = cie_ptr;
2773 cie_ctx->word_size = fde_ctx->word_size;
2774 cie_ctx->end_data = cie_ptr + 4;
2775 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx);
2776 if (dwarf2_parse_u4(cie_ctx) != cie_id)
2777 {
2778 FIXME("wrong CIE pointer at %x from FDE %x\n",
2779 (unsigned)(cie_ptr - start_data),
2780 (unsigned)(fde_ctx->data - start_data));
2781 return FALSE;
2782 }
2783 if (!parse_cie_details(cie_ctx, info)) return FALSE;
2784 }
2785 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding);
2786 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F);
2787
2788 if (addr >= start && addr < start + range)
2789 {
2790 /* reset the FDE context */
2791 fde_ctx->end_data = ptr_blk;
2792
2793 info->ip = start;
2794 return TRUE;
2795 }
2796 }
2797 return FALSE;
2798 }
2799
2800 static int valid_reg(ULONG_PTR reg)
2801 {
2802 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg);
2803 return (reg < NB_FRAME_REGS);
2804 }
2805
2806 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx,
2807 ULONG_PTR last_ip, struct frame_info *info)
2808 {
2809 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame)
2810 {
2811 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx);
2812
2813 if (op & 0xc0)
2814 {
2815 switch (op & 0xc0)
2816 {
2817 case DW_CFA_advance_loc:
2818 {
2819 ULONG_PTR offset = (op & 0x3f) * info->code_align;
2820 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset);
2821 info->ip += offset;
2822 break;
2823 }
2824 case DW_CFA_offset:
2825 {
2826 ULONG_PTR reg = op & 0x3f;
2827 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align;
2828 if (!valid_reg(reg)) break;
2829 TRACE("%lx: DW_CFA_offset %s, %ld\n",
2830 info->ip,
2831 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2832 offset);
2833 info->state.regs[reg] = offset;
2834 info->state.rules[reg] = RULE_CFA_OFFSET;
2835 break;
2836 }
2837 case DW_CFA_restore:
2838 {
2839 ULONG_PTR reg = op & 0x3f;
2840 if (!valid_reg(reg)) break;
2841 TRACE("%lx: DW_CFA_restore %s\n",
2842 info->ip,
2843 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2844 info->state.rules[reg] = RULE_UNSET;
2845 break;
2846 }
2847 }
2848 }
2849 else switch (op)
2850 {
2851 case DW_CFA_nop:
2852 break;
2853 case DW_CFA_set_loc:
2854 {
2855 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding);
2856 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc);
2857 info->ip = loc;
2858 break;
2859 }
2860 case DW_CFA_advance_loc1:
2861 {
2862 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align;
2863 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset);
2864 info->ip += offset;
2865 break;
2866 }
2867 case DW_CFA_advance_loc2:
2868 {
2869 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align;
2870 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset);
2871 info->ip += offset;
2872 break;
2873 }
2874 case DW_CFA_advance_loc4:
2875 {
2876 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align;
2877 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset);
2878 info->ip += offset;
2879 break;
2880 }
2881 case DW_CFA_offset_extended:
2882 case DW_CFA_offset_extended_sf:
2883 {
2884 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2885 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align
2886 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2887 if (!valid_reg(reg)) break;
2888 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n",
2889 info->ip,
2890 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2891 offset);
2892 info->state.regs[reg] = offset;
2893 info->state.rules[reg] = RULE_CFA_OFFSET;
2894 break;
2895 }
2896 case DW_CFA_restore_extended:
2897 {
2898 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2899 if (!valid_reg(reg)) break;
2900 TRACE("%lx: DW_CFA_restore_extended %s\n",
2901 info->ip,
2902 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2903 info->state.rules[reg] = RULE_UNSET;
2904 break;
2905 }
2906 case DW_CFA_undefined:
2907 {
2908 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2909 if (!valid_reg(reg)) break;
2910 TRACE("%lx: DW_CFA_undefined %s\n",
2911 info->ip,
2912 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2913 info->state.rules[reg] = RULE_UNDEFINED;
2914 break;
2915 }
2916 case DW_CFA_same_value:
2917 {
2918 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2919 if (!valid_reg(reg)) break;
2920 TRACE("%lx: DW_CFA_same_value %s\n",
2921 info->ip,
2922 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2923 info->state.regs[reg] = reg;
2924 info->state.rules[reg] = RULE_SAME;
2925 break;
2926 }
2927 case DW_CFA_register:
2928 {
2929 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2930 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx);
2931 if (!valid_reg(reg) || !valid_reg(reg2)) break;
2932 TRACE("%lx: DW_CFA_register %s == %s\n",
2933 info->ip,
2934 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2935 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, TRUE)));
2936 info->state.regs[reg] = reg2;
2937 info->state.rules[reg] = RULE_OTHER_REG;
2938 break;
2939 }
2940 case DW_CFA_remember_state:
2941 TRACE("%lx: DW_CFA_remember_state\n", info->ip);
2942 if (info->state_sp >= MAX_SAVED_STATES)
2943 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip);
2944 else
2945 info->state_stack[info->state_sp++] = info->state;
2946 break;
2947 case DW_CFA_restore_state:
2948 TRACE("%lx: DW_CFA_restore_state\n", info->ip);
2949 if (!info->state_sp)
2950 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip);
2951 else
2952 info->state = info->state_stack[--info->state_sp];
2953 break;
2954 case DW_CFA_def_cfa:
2955 case DW_CFA_def_cfa_sf:
2956 {
2957 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2958 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx)
2959 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2960 if (!valid_reg(reg)) break;
2961 TRACE("%lx: DW_CFA_def_cfa %s, %ld\n",
2962 info->ip,
2963 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
2964 offset);
2965 info->state.cfa_reg = reg;
2966 info->state.cfa_offset = offset;
2967 info->state.cfa_rule = RULE_CFA_OFFSET;
2968 break;
2969 }
2970 case DW_CFA_def_cfa_register:
2971 {
2972 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
2973 if (!valid_reg(reg)) break;
2974 TRACE("%lx: DW_CFA_def_cfa_register %s\n",
2975 info->ip,
2976 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)));
2977 info->state.cfa_reg = reg;
2978 info->state.cfa_rule = RULE_CFA_OFFSET;
2979 break;
2980 }
2981 case DW_CFA_def_cfa_offset:
2982 case DW_CFA_def_cfa_offset_sf:
2983 {
2984 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx)
2985 : dwarf2_leb128_as_signed(ctx) * info->data_align;
2986 TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset);
2987 info->state.cfa_offset = offset;
2988 info->state.cfa_rule = RULE_CFA_OFFSET;
2989 break;
2990 }
2991 case DW_CFA_def_cfa_expression:
2992 {
2993 ULONG_PTR expr = (ULONG_PTR)ctx->data;
2994 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
2995 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len);
2996 info->state.cfa_offset = expr;
2997 info->state.cfa_rule = RULE_VAL_EXPRESSION;
2998 ctx->data += len;
2999 break;
3000 }
3001 case DW_CFA_expression:
3002 case DW_CFA_val_expression:
3003 {
3004 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx);
3005 ULONG_PTR expr = (ULONG_PTR)ctx->data;
3006 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx);
3007 if (!valid_reg(reg)) break;
3008 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n",
3009 info->ip, (op == DW_CFA_expression) ? "" : "val_",
3010 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)),
3011 expr, expr + len);
3012 info->state.regs[reg] = expr;
3013 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
3014 ctx->data += len;
3015 break;
3016 }
3017 case DW_CFA_GNU_args_size:
3018 /* FIXME: should check that GCC is the compiler for this CU */
3019 {
3020 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx);
3021 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args);
3022 /* ignored */
3023 break;
3024 }
3025 default:
3026 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op);
3027 break;
3028 }
3029 }
3030 }
3031
3032 /* retrieve a context register from its dwarf number */
3033 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg)
3034 {
3035 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz;
3036 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz);
3037
3038 if (sz != sizeof(ULONG_PTR))
3039 {
3040 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz);
3041 return 0;
3042 }
3043 return *ptr;
3044 }