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dbghelp: Use elf load_offset passed to dwarf2_parse to relocate addresses.
[wine/multimedia.git] / dlls / dbghelp / dwarf.c
blob12195221cce2bfaa6cf7e28773e833b9080c9bba
1 /*
2 * File dwarf.c - read dwarf2 information from the ELF modules
3 *
4 * Copyright (C) 2005, Raphael Junqueira
5 * Copyright (C) 2006, Eric Pouech
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include "config.h"
23
24 #include <sys/types.h>
25 #include <fcntl.h>
26 #ifdef HAVE_SYS_STAT_H
27 # include <sys/stat.h>
28 #endif
29 #ifdef HAVE_SYS_MMAN_H
30 #include <sys/mman.h>
31 #endif
32 #include <limits.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #ifdef HAVE_UNISTD_H
36 # include <unistd.h>
37 #endif
38 #include <stdio.h>
39 #ifndef PATH_MAX
40 #define PATH_MAX MAX_PATH
41 #endif
42 #include <assert.h>
43 #include <stdarg.h>
44
45 #include "windef.h"
46 #include "winbase.h"
47 #include "winreg.h"
48 #include "winnls.h"
49 #include "winuser.h"
50 #include "ole2.h"
51 #include "oleauto.h"
52
53 #include "dbghelp_private.h"
54
55 #include "wine/debug.h"
56
57 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
58
59 /* FIXME:
60 * - Functions:
61 * o unspecified parameters
62 * o inlined functions
63 * o Debug{Start|End}Point
64 * o CFA
65 * - Udt
66 * o proper types loading (nesting)
67 */
68
69 #if 0
70 static void dump(const void* ptr, unsigned len)
71 {
72 int i, j;
73 BYTE msg[128];
74 static const char hexof[] = "0123456789abcdef";
75 const BYTE* x = (const BYTE*)ptr;
76
77 for (i = 0; i < len; i += 16)
78 {
79 sprintf(msg, "%08x: ", i);
80 memset(msg + 10, ' ', 3 * 16 + 1 + 16);
81 for (j = 0; j < min(16, len - i); j++)
82 {
83 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4];
84 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15];
85 msg[10 + 3 * j + 2] = ' ';
86 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ?
87 x[i + j] : '.';
88 }
89 msg[10 + 3 * 16] = ' ';
90 msg[10 + 3 * 16 + 1 + 16] = '\0';
91 TRACE("%s\n", msg);
92 }
93 }
94 #endif
95
96 /**
97 *
98 * Main Specs:
99 * http://www.eagercon.com/dwarf/dwarf3std.htm
100 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
101 *
102 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
103 *
104 * example of projects who do dwarf2 parsing:
105 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
106 * http://elis.ugent.be/diota/log/ltrace_elf.c
107 */
108 #include "dwarf.h"
109
110 /**
111 * Parsers
112 */
113
114 typedef struct dwarf2_abbrev_entry_attr_s
115 {
116 unsigned long attribute;
117 unsigned long form;
118 struct dwarf2_abbrev_entry_attr_s* next;
119 } dwarf2_abbrev_entry_attr_t;
120
121 typedef struct dwarf2_abbrev_entry_s
122 {
123 unsigned long entry_code;
124 unsigned long tag;
125 unsigned char have_child;
126 unsigned num_attr;
127 dwarf2_abbrev_entry_attr_t* attrs;
128 } dwarf2_abbrev_entry_t;
129
130 struct dwarf2_block
131 {
132 unsigned size;
133 const unsigned char* ptr;
134 };
135
136 struct attribute
137 {
138 unsigned long form;
139 union
140 {
141 unsigned long uvalue;
142 long svalue;
143 const char* string;
144 struct dwarf2_block block;
145 } u;
146 };
147
148 typedef struct dwarf2_debug_info_s
149 {
150 const dwarf2_abbrev_entry_t*abbrev;
151 struct symt* symt;
152 const unsigned char** data;
153 struct vector children;
154 } dwarf2_debug_info_t;
155
156 typedef struct dwarf2_section_s
157 {
158 const unsigned char* address;
159 unsigned size;
160 } dwarf2_section_t;
161
162 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_max};
163
164 typedef struct dwarf2_traverse_context_s
165 {
166 const unsigned char* data;
167 const unsigned char* start_data;
168 const unsigned char* end_data;
169 unsigned char word_size;
170 } dwarf2_traverse_context_t;
171
172 typedef struct dwarf2_parse_context_s
173 {
174 const dwarf2_section_t* sections;
175 unsigned section;
176 struct pool pool;
177 struct module* module;
178 const struct elf_thunk_area*thunks;
179 struct sparse_array abbrev_table;
180 struct sparse_array debug_info_table;
181 unsigned long load_offset;
182 unsigned long ref_offset;
183 unsigned char word_size;
184 } dwarf2_parse_context_t;
185
186 /* stored in the dbghelp's module internal structure for later reuse */
187 struct dwarf2_module_info_s
188 {
189 dwarf2_section_t debug_loc;
190 };
191
192 #define loc_dwarf2_location_list (loc_user + 0)
193 #define loc_dwarf2_block (loc_user + 1)
194
195 /* forward declarations */
196 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
197
198 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
199 {
200 return *ptr;
201 }
202
203 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
204 {
205 unsigned char uvalue = dwarf2_get_byte(ctx->data);
206 ctx->data += 1;
207 return uvalue;
208 }
209
210 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
211 {
212 return *(const unsigned short*)ptr;
213 }
214
215 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
216 {
217 unsigned short uvalue = dwarf2_get_u2(ctx->data);
218 ctx->data += 2;
219 return uvalue;
220 }
221
222 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
223 {
224 return *(const unsigned long*)ptr;
225 }
226
227 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
228 {
229 unsigned long uvalue = dwarf2_get_u4(ctx->data);
230 ctx->data += 4;
231 return uvalue;
232 }
233
234 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
235 {
236 unsigned long ret = 0;
237 unsigned char byte;
238 unsigned shift = 0;
239
240 do
241 {
242 byte = dwarf2_get_byte(ptr++);
243 ret |= (byte & 0x7f) << shift;
244 shift += 7;
245 } while (byte & 0x80);
246
247 if (end) *end = ptr;
248 return ret;
249 }
250
251 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
252 {
253 unsigned long ret;
254
255 assert(ctx);
256
257 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
258
259 return ret;
260 }
261
262 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
263 {
264 long ret = 0;
265 unsigned char byte;
266 unsigned shift = 0;
267 const unsigned size = sizeof(int) * 8;
268
269 do
270 {
271 byte = dwarf2_get_byte(ptr++);
272 ret |= (byte & 0x7f) << shift;
273 shift += 7;
274 } while (byte & 0x80);
275 if (end) *end = ptr;
276
277 /* as spec: sign bit of byte is 2nd high order bit (80x40)
278 * -> 0x80 is used as flag.
279 */
280 if ((shift < size) && (byte & 0x40))
281 {
282 ret |= - (1 << shift);
283 }
284 return ret;
285 }
286
287 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
288 {
289 long ret = 0;
290
291 assert(ctx);
292
293 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
294 return ret;
295 }
296
297 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
298 {
299 unsigned ret;
300 for (ret = 0; ctx->data[ret] & 0x80; ret++);
301 return ret + 1;
302 }
303
304 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
305 {
306 unsigned long ret;
307
308 switch (word_size)
309 {
310 case 4:
311 ret = dwarf2_get_u4(ptr);
312 break;
313 default:
314 FIXME("Unsupported Word Size %u\n", word_size);
315 ret = 0;
316 }
317 return ret;
318 }
319
320 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
321 {
322 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
323 ctx->data += ctx->word_size;
324 return ret;
325 }
326
327 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
328 {
329 return wine_dbg_sprintf("ctx(%p)", ctx->data);
330 }
331
332 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
333 {
334 return wine_dbg_sprintf("ctx(%p,%s)",
335 ctx, debugstr_w(ctx->module->module.ModuleName));
336 }
337
338 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
339 {
340 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
341 di->abbrev, di->symt);
342 }
343
344 static dwarf2_abbrev_entry_t*
345 dwarf2_abbrev_table_find_entry(struct sparse_array* abbrev_table,
346 unsigned long entry_code)
347 {
348 assert( NULL != abbrev_table );
349 return sparse_array_find(abbrev_table, entry_code);
350 }
351
352 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
353 struct sparse_array* abbrev_table,
354 struct pool* pool)
355 {
356 unsigned long entry_code;
357 dwarf2_abbrev_entry_t* abbrev_entry;
358 dwarf2_abbrev_entry_attr_t* new = NULL;
359 dwarf2_abbrev_entry_attr_t* last = NULL;
360 unsigned long attribute;
361 unsigned long form;
362
363 assert( NULL != abbrev_ctx );
364
365 TRACE("%s, end at %p\n",
366 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
367
368 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
369 while (abbrev_ctx->data < abbrev_ctx->end_data)
370 {
371 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
372 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
373 TRACE("found entry_code %lu\n", entry_code);
374 if (!entry_code)
375 {
376 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
377 break;
378 }
379 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
380 assert( NULL != abbrev_entry );
381
382 abbrev_entry->entry_code = entry_code;
383 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
384 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
385 abbrev_entry->attrs = NULL;
386 abbrev_entry->num_attr = 0;
387
388 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
389 abbrev_table, sparse_array_length(abbrev_table),
390 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
391
392 last = NULL;
393 while (1)
394 {
395 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
396 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
397 if (!attribute) break;
398
399 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
400 assert(new);
401
402 new->attribute = attribute;
403 new->form = form;
404 new->next = NULL;
405 if (abbrev_entry->attrs) last->next = new;
406 else abbrev_entry->attrs = new;
407 last = new;
408 abbrev_entry->num_attr++;
409 }
410 }
411 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
412 }
413
414 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
415 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
416 {
417 unsigned step;
418
419 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
420
421 switch (abbrev_attr->form)
422 {
423 case DW_FORM_ref_addr:
424 case DW_FORM_addr: step = ctx->word_size; break;
425 case DW_FORM_flag:
426 case DW_FORM_data1:
427 case DW_FORM_ref1: step = 1; break;
428 case DW_FORM_data2:
429 case DW_FORM_ref2: step = 2; break;
430 case DW_FORM_data4:
431 case DW_FORM_ref4:
432 case DW_FORM_strp: step = 4; break;
433 case DW_FORM_data8:
434 case DW_FORM_ref8: step = 8; break;
435 case DW_FORM_sdata:
436 case DW_FORM_ref_udata:
437 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
438 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
439 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
440 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
441 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
442 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
443 default:
444 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
445 return;
446 }
447 ctx->data += step;
448 }
449
450 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
451 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
452 const unsigned char* data,
453 struct attribute* attr)
454 {
455 attr->form = abbrev_attr->form;
456 switch (attr->form)
457 {
458 case DW_FORM_ref_addr:
459 case DW_FORM_addr:
460 attr->u.uvalue = dwarf2_get_addr(data, ctx->word_size);
461 TRACE("addr<0x%lx>\n", attr->u.uvalue);
462 break;
463
464 case DW_FORM_flag:
465 attr->u.uvalue = dwarf2_get_byte(data);
466 TRACE("flag<0x%lx>\n", attr->u.uvalue);
467 break;
468
469 case DW_FORM_data1:
470 attr->u.uvalue = dwarf2_get_byte(data);
471 TRACE("data1<%lu>\n", attr->u.uvalue);
472 break;
473
474 case DW_FORM_data2:
475 attr->u.uvalue = dwarf2_get_u2(data);
476 TRACE("data2<%lu>\n", attr->u.uvalue);
477 break;
478
479 case DW_FORM_data4:
480 attr->u.uvalue = dwarf2_get_u4(data);
481 TRACE("data4<%lu>\n", attr->u.uvalue);
482 break;
483
484 case DW_FORM_data8:
485 FIXME("Unhandled 64bits support\n");
486 break;
487
488 case DW_FORM_ref1:
489 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
490 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
491 break;
492
493 case DW_FORM_ref2:
494 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
495 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
496 break;
497
498 case DW_FORM_ref4:
499 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
500 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
501 break;
502
503 case DW_FORM_ref8:
504 FIXME("Unhandled 64 bit support\n");
505 break;
506
507 case DW_FORM_sdata:
508 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
509 break;
510
511 case DW_FORM_ref_udata:
512 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
513 break;
514
515 case DW_FORM_udata:
516 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
517 break;
518
519 case DW_FORM_string:
520 attr->u.string = (const char *)data;
521 TRACE("string<%s>\n", attr->u.string);
522 break;
523
524 case DW_FORM_strp:
525 {
526 unsigned long offset = dwarf2_get_u4(data);
527 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
528 }
529 TRACE("strp<%s>\n", attr->u.string);
530 break;
531
532 case DW_FORM_block:
533 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
534 break;
535
536 case DW_FORM_block1:
537 attr->u.block.size = dwarf2_get_byte(data);
538 attr->u.block.ptr = data + 1;
539 break;
540
541 case DW_FORM_block2:
542 attr->u.block.size = dwarf2_get_u2(data);
543 attr->u.block.ptr = data + 2;
544 break;
545
546 case DW_FORM_block4:
547 attr->u.block.size = dwarf2_get_u4(data);
548 attr->u.block.ptr = data + 4;
549 break;
550
551 default:
552 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
553 break;
554 }
555 }
556
557 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
558 const dwarf2_debug_info_t* di,
559 unsigned at, struct attribute* attr)
560 {
561 unsigned i, ai = 0;
562 dwarf2_abbrev_entry_attr_t* abbrev_attr;
563 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
564
565 while (di)
566 {
567 abstract_abbrev_attr = NULL;
568 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
569 {
570 if (abbrev_attr->attribute == at)
571 {
572 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
573 return TRUE;
574 }
575 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
576 at != DW_AT_sibling)
577 {
578 abstract_abbrev_attr = abbrev_attr;
579 ai = i;
580 }
581 }
582 /* do we have an abstract origin debug entry to look into ? */
583 if (!abstract_abbrev_attr) break;
584 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
585 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
586 FIXME("Should have found the debug info entry\n");
587 }
588 return FALSE;
589 }
590
591 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
592 struct symt_compiland*);
593
594 #define Wine_DW_no_register 0x7FFFFFFF
595
596 static unsigned dwarf2_map_register(int regno)
597 {
598 unsigned reg;
599
600 switch (regno)
601 {
602 case Wine_DW_no_register: FIXME("What the heck map reg 0x%x\n",regno); reg = 0; break;
603 case 0: reg = CV_REG_EAX; break;
604 case 1: reg = CV_REG_ECX; break;
605 case 2: reg = CV_REG_EDX; break;
606 case 3: reg = CV_REG_EBX; break;
607 case 4: reg = CV_REG_ESP; break;
608 case 5: reg = CV_REG_EBP; break;
609 case 6: reg = CV_REG_ESI; break;
610 case 7: reg = CV_REG_EDI; break;
611 case 8: reg = CV_REG_EIP; break;
612 case 9: reg = CV_REG_EFLAGS; break;
613 case 10: reg = CV_REG_CS; break;
614 case 11: reg = CV_REG_SS; break;
615 case 12: reg = CV_REG_DS; break;
616 case 13: reg = CV_REG_ES; break;
617 case 14: reg = CV_REG_FS; break;
618 case 15: reg = CV_REG_GS; break;
619 case 16: case 17: case 18: case 19:
620 case 20: case 21: case 22: case 23:
621 reg = CV_REG_ST0 + regno - 16; break;
622 case 24: reg = CV_REG_CTRL; break;
623 case 25: reg = CV_REG_STAT; break;
624 case 26: reg = CV_REG_TAG; break;
625 /*
626 reg: fiseg 27
627 reg: fioff 28
628 reg: foseg 29
629 reg: fooff 30
630 reg: fop 31
631 */
632 case 32: case 33: case 34: case 35:
633 case 36: case 37: case 38: case 39:
634 reg = CV_REG_XMM0 + regno - 32; break;
635 case 40: reg = CV_REG_MXCSR; break;
636 default:
637 FIXME("Don't know how to map register %d\n", regno);
638 return 0;
639 }
640 return reg;
641 }
642
643 static enum location_error
644 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
645 HANDLE hproc, const struct location* frame)
646 {
647 unsigned long stack[64];
648 unsigned stk;
649 unsigned char op;
650 BOOL piece_found = FALSE;
651
652 stack[stk = 0] = 0;
653
654 loc->kind = loc_absolute;
655 loc->reg = Wine_DW_no_register;
656
657 while (ctx->data < ctx->end_data)
658 {
659 op = dwarf2_parse_byte(ctx);
660 switch (op)
661 {
662 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
663 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
664 case DW_OP_const1s: stack[++stk] = (long)(signed char)dwarf2_parse_byte(ctx); break;
665 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
666 case DW_OP_const2s: stack[++stk] = (long)(short)dwarf2_parse_u2(ctx); break;
667 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
668 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
669 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
670 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
671 case DW_OP_plus_uconst:
672 stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
673 case DW_OP_reg0: case DW_OP_reg1: case DW_OP_reg2: case DW_OP_reg3:
674 case DW_OP_reg4: case DW_OP_reg5: case DW_OP_reg6: case DW_OP_reg7:
675 case DW_OP_reg8: case DW_OP_reg9: case DW_OP_reg10: case DW_OP_reg11:
676 case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14: case DW_OP_reg15:
677 case DW_OP_reg16: case DW_OP_reg17: case DW_OP_reg18: case DW_OP_reg19:
678 case DW_OP_reg20: case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23:
679 case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26: case DW_OP_reg27:
680 case DW_OP_reg28: case DW_OP_reg29: case DW_OP_reg30: case DW_OP_reg31:
681 /* dbghelp APIs don't know how to cope with this anyway
682 * (for example 'long long' stored in two registers)
683 * FIXME: We should tell winedbg how to deal with it (sigh)
684 */
685 if (!piece_found)
686 {
687 if (loc->reg != Wine_DW_no_register)
688 FIXME("Only supporting one reg (%d -> %d)\n",
689 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
690 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
691 }
692 loc->kind = loc_register;
693 break;
694 case DW_OP_breg0: case DW_OP_breg1: case DW_OP_breg2: case DW_OP_breg3:
695 case DW_OP_breg4: case DW_OP_breg5: case DW_OP_breg6: case DW_OP_breg7:
696 case DW_OP_breg8: case DW_OP_breg9: case DW_OP_breg10: case DW_OP_breg11:
697 case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14: case DW_OP_breg15:
698 case DW_OP_breg16: case DW_OP_breg17: case DW_OP_breg18: case DW_OP_breg19:
699 case DW_OP_breg20: case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23:
700 case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26: case DW_OP_breg27:
701 case DW_OP_breg28: case DW_OP_breg29: case DW_OP_breg30: case DW_OP_breg31:
702 /* dbghelp APIs don't know how to cope with this anyway
703 * (for example 'long long' stored in two registers)
704 * FIXME: We should tell winedbg how to deal with it (sigh)
705 */
706 if (!piece_found)
707 {
708 if (loc->reg != Wine_DW_no_register)
709 FIXME("Only supporting one reg (%d -> %d)\n",
710 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
711 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
712 }
713 stack[++stk] = dwarf2_leb128_as_signed(ctx);
714 loc->kind = loc_regrel;
715 break;
716 case DW_OP_fbreg:
717 if (loc->reg != Wine_DW_no_register)
718 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
719 if (frame && frame->kind == loc_register)
720 {
721 loc->kind = loc_regrel;
722 loc->reg = frame->reg;
723 stack[++stk] = dwarf2_leb128_as_signed(ctx);
724 }
725 else if (frame && frame->kind == loc_regrel)
726 {
727 loc->kind = loc_regrel;
728 loc->reg = frame->reg;
729 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
730 }
731 else
732 {
733 /* FIXME: this could be later optimized by not recomputing
734 * this very location expression
735 */
736 loc->kind = loc_dwarf2_block;
737 stack[++stk] = dwarf2_leb128_as_signed(ctx);
738 }
739 break;
740 case DW_OP_piece:
741 {
742 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
743 WARN("Not handling OP_piece (size=%d)\n", sz);
744 piece_found = TRUE;
745 }
746 break;
747 case DW_OP_deref:
748 if (!stk)
749 {
750 FIXME("Unexpected empty stack\n");
751 return loc_err_internal;
752 }
753 if (loc->reg != Wine_DW_no_register)
754 {
755 WARN("Too complex expression for deref\n");
756 return loc_err_too_complex;
757 }
758 if (hproc)
759 {
760 DWORD addr = stack[stk--];
761 DWORD deref;
762
763 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
764 {
765 WARN("Couldn't read memory at %x\n", addr);
766 return loc_err_cant_read;
767 }
768 stack[++stk] = deref;
769 }
770 else
771 {
772 loc->kind = loc_dwarf2_block;
773 }
774 break;
775 default:
776 FIXME("Unhandled attr op: %x\n", op);
777 return loc_err_internal;
778 }
779 }
780 loc->offset = stack[stk];
781 return 0;
782 }
783
784 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
785 dwarf2_debug_info_t* di,
786 unsigned long dw,
787 struct location* loc,
788 const struct location* frame)
789 {
790 struct attribute xloc;
791
792 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
793
794 switch (xloc.form)
795 {
796 case DW_FORM_data1: case DW_FORM_data2:
797 case DW_FORM_udata: case DW_FORM_sdata:
798 loc->kind = loc_absolute;
799 loc->reg = 0;
800 loc->offset = xloc.u.uvalue;
801 return TRUE;
802 case DW_FORM_data4: case DW_FORM_data8:
803 loc->kind = loc_dwarf2_location_list;
804 loc->reg = Wine_DW_no_register;
805 loc->offset = xloc.u.uvalue;
806 return TRUE;
807 }
808
809 /* assume we have a block form */
810
811 if (xloc.u.block.size)
812 {
813 dwarf2_traverse_context_t lctx;
814 enum location_error err;
815
816 lctx.data = xloc.u.block.ptr;
817 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
818 lctx.word_size = ctx->word_size;
819
820 err = compute_location(&lctx, loc, NULL, frame);
821 if (err < 0)
822 {
823 loc->kind = loc_error;
824 loc->reg = err;
825 }
826 else if (loc->kind == loc_dwarf2_block)
827 {
828 unsigned* ptr = pool_alloc(&ctx->module->pool,
829 sizeof(unsigned) + xloc.u.block.size);
830 *ptr = xloc.u.block.size;
831 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
832 loc->offset = (unsigned long)ptr;
833 }
834 }
835 return TRUE;
836 }
837
838 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
839 const dwarf2_debug_info_t* di)
840 {
841 struct attribute attr;
842
843 if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
844 {
845 dwarf2_debug_info_t* type;
846
847 type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
848 if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
849 if (!type->symt)
850 {
851 /* load the debug info entity */
852 dwarf2_load_one_entry(ctx, type, NULL);
853 }
854 return type->symt;
855 }
856 return NULL;
857 }
858
859 /******************************************************************
860 * dwarf2_read_one_debug_info
861 *
862 * Loads into memory one debug info entry, and recursively its children (if any)
863 */
864 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
865 dwarf2_traverse_context_t* traverse,
866 dwarf2_debug_info_t** pdi)
867 {
868 const dwarf2_abbrev_entry_t*abbrev;
869 unsigned long entry_code;
870 unsigned long offset;
871 dwarf2_debug_info_t* di;
872 dwarf2_debug_info_t* child;
873 dwarf2_debug_info_t** where;
874 dwarf2_abbrev_entry_attr_t* attr;
875 unsigned i;
876 struct attribute sibling;
877
878 offset = traverse->data - ctx->sections[ctx->section].address;
879 entry_code = dwarf2_leb128_as_unsigned(traverse);
880 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
881 if (!entry_code)
882 {
883 *pdi = NULL;
884 return TRUE;
885 }
886 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
887 if (!abbrev)
888 {
889 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
890 return FALSE;
891 }
892 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
893 if (!di) return FALSE;
894 di->abbrev = abbrev;
895 di->symt = NULL;
896
897 if (abbrev->num_attr)
898 {
899 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
900 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
901 {
902 di->data[i] = traverse->data;
903 dwarf2_swallow_attribute(traverse, attr);
904 }
905 }
906 else di->data = NULL;
907 if (abbrev->have_child)
908 {
909 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
910 while (traverse->data < traverse->end_data)
911 {
912 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
913 if (!child) break;
914 where = vector_add(&di->children, &ctx->pool);
915 if (!where) return FALSE;
916 *where = child;
917 }
918 }
919 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
920 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
921 {
922 WARN("setting cursor for %s to next sibling <0x%lx>\n",
923 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
924 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
925 }
926 *pdi = di;
927 return TRUE;
928 }
929
930 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
931 dwarf2_debug_info_t* di)
932 {
933 struct attribute name;
934 struct attribute size;
935 struct attribute encoding;
936 enum BasicType bt;
937
938 if (di->symt) return di->symt;
939
940 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
941
942 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
943 name.u.string = NULL;
944 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
945 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
946
947 switch (encoding.u.uvalue)
948 {
949 case DW_ATE_void: bt = btVoid; break;
950 case DW_ATE_address: bt = btULong; break;
951 case DW_ATE_boolean: bt = btBool; break;
952 case DW_ATE_complex_float: bt = btComplex; break;
953 case DW_ATE_float: bt = btFloat; break;
954 case DW_ATE_signed: bt = btInt; break;
955 case DW_ATE_unsigned: bt = btUInt; break;
956 case DW_ATE_signed_char: bt = btChar; break;
957 case DW_ATE_unsigned_char: bt = btChar; break;
958 default: bt = btNoType; break;
959 }
960 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
961 if (di->abbrev->have_child) FIXME("Unsupported children\n");
962 return di->symt;
963 }
964
965 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
966 dwarf2_debug_info_t* di)
967 {
968 struct symt* ref_type;
969 struct attribute name;
970
971 if (di->symt) return di->symt;
972
973 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
974
975 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
976 ref_type = dwarf2_lookup_type(ctx, di);
977
978 if (name.u.string)
979 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
980 if (di->abbrev->have_child) FIXME("Unsupported children\n");
981 return di->symt;
982 }
983
984 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
985 dwarf2_debug_info_t* di)
986 {
987 struct symt* ref_type;
988 struct attribute size;
989
990 if (di->symt) return di->symt;
991
992 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
993
994 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
995 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
996 ref_type = &symt_new_basic(ctx->module, btVoid, "void", 0)->symt;
997
998 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
999 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1000 return di->symt;
1001 }
1002
1003 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1004 dwarf2_debug_info_t* di)
1005 {
1006 struct symt* ref_type;
1007 struct symt* idx_type = NULL;
1008 struct attribute min, max, cnt;
1009 dwarf2_debug_info_t** pchild = NULL;
1010 dwarf2_debug_info_t* child;
1011
1012 if (di->symt) return di->symt;
1013
1014 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1015
1016 if (!di->abbrev->have_child)
1017 {
1018 FIXME("array without range information\n");
1019 return NULL;
1020 }
1021 ref_type = dwarf2_lookup_type(ctx, di);
1022
1023 while ((pchild = vector_iter_up(&di->children, pchild)))
1024 {
1025 child = *pchild;
1026 switch (child->abbrev->tag)
1027 {
1028 case DW_TAG_subrange_type:
1029 idx_type = dwarf2_lookup_type(ctx, child);
1030 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1031 min.u.uvalue = 0;
1032 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1033 max.u.uvalue = 0;
1034 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1035 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1036 break;
1037 default:
1038 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1039 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1040 break;
1041 }
1042 }
1043 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1044 return di->symt;
1045 }
1046
1047 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1048 dwarf2_debug_info_t* di)
1049 {
1050 struct symt* ref_type;
1051
1052 if (di->symt) return di->symt;
1053
1054 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1055
1056 ref_type = dwarf2_lookup_type(ctx, di);
1057 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1058 di->symt = ref_type;
1059
1060 return ref_type;
1061 }
1062
1063 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1064 dwarf2_debug_info_t* di)
1065 {
1066 struct symt* ref_type;
1067
1068 if (di->symt) return di->symt;
1069
1070 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1071
1072 ref_type = dwarf2_lookup_type(ctx, di);
1073 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1074 di->symt = ref_type;
1075
1076 return ref_type;
1077 }
1078
1079 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1080 dwarf2_debug_info_t* di)
1081 {
1082 struct symt* ref_type = NULL;
1083
1084 if (di->symt) return di->symt;
1085
1086 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1087
1088 ref_type = dwarf2_lookup_type(ctx, di);
1089 /* FIXME: for now, we hard-wire C++ references to pointers */
1090 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1091
1092 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1093
1094 return di->symt;
1095 }
1096
1097 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1098 dwarf2_debug_info_t* di,
1099 struct symt_udt* parent)
1100 {
1101 struct symt* elt_type;
1102 struct attribute name;
1103 struct attribute bit_size;
1104 struct attribute bit_offset;
1105 struct location loc;
1106
1107 assert(parent);
1108
1109 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1110
1111 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1112 elt_type = dwarf2_lookup_type(ctx, di);
1113 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1114 {
1115 if (loc.kind != loc_absolute)
1116 {
1117 FIXME("Found register, while not expecting it\n");
1118 loc.offset = 0;
1119 }
1120 else
1121 TRACE("found member_location at %s -> %lu\n",
1122 dwarf2_debug_ctx(ctx), loc.offset);
1123 }
1124 else
1125 loc.offset = 0;
1126 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1127 bit_size.u.uvalue = 0;
1128 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1129 {
1130 /* FIXME: we should only do this when implementation is LSB (which is
1131 * the case on i386 processors)
1132 */
1133 struct attribute nbytes;
1134 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1135 {
1136 DWORD64 size;
1137 nbytes.u.uvalue = symt_get_info(elt_type, TI_GET_LENGTH, &size) ? (unsigned long)size : 0;
1138 }
1139 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1140 }
1141 else bit_offset.u.uvalue = 0;
1142 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1143 (loc.offset << 3) + bit_offset.u.uvalue,
1144 bit_size.u.uvalue);
1145
1146 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1147 }
1148
1149 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1150 dwarf2_debug_info_t* di,
1151 enum UdtKind udt)
1152 {
1153 struct attribute name;
1154 struct attribute size;
1155
1156 if (di->symt) return di->symt;
1157
1158 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1159
1160 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1161 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1162
1163 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1164
1165 if (di->abbrev->have_child) /** any interest to not have child ? */
1166 {
1167 dwarf2_debug_info_t** pchild = NULL;
1168 dwarf2_debug_info_t* child;
1169
1170 while ((pchild = vector_iter_up(&di->children, pchild)))
1171 {
1172 child = *pchild;
1173
1174 switch (child->abbrev->tag)
1175 {
1176 case DW_TAG_member:
1177 /* FIXME: should I follow the sibling stuff ?? */
1178 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1179 break;
1180 case DW_TAG_enumeration_type:
1181 dwarf2_parse_enumeration_type(ctx, child);
1182 break;
1183 case DW_TAG_structure_type:
1184 case DW_TAG_class_type:
1185 case DW_TAG_union_type:
1186 /* FIXME: we need to handle nested udt definitions */
1187 break;
1188 default:
1189 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1190 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1191 break;
1192 }
1193 }
1194 }
1195
1196 return di->symt;
1197 }
1198
1199 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1200 dwarf2_debug_info_t* di,
1201 struct symt_enum* parent)
1202 {
1203 struct attribute name;
1204 struct attribute value;
1205
1206 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1207
1208 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1209 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1210 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1211
1212 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1213 }
1214
1215 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1216 dwarf2_debug_info_t* di)
1217 {
1218 struct attribute name;
1219 struct attribute size;
1220
1221 if (di->symt) return di->symt;
1222
1223 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1224
1225 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1226 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1227
1228 di->symt = &symt_new_enum(ctx->module, name.u.string)->symt;
1229
1230 if (di->abbrev->have_child) /* any interest to not have child ? */
1231 {
1232 dwarf2_debug_info_t** pchild = NULL;
1233 dwarf2_debug_info_t* child;
1234
1235 /* FIXME: should we use the sibling stuff ?? */
1236 while ((pchild = vector_iter_up(&di->children, pchild)))
1237 {
1238 child = *pchild;
1239
1240 switch (child->abbrev->tag)
1241 {
1242 case DW_TAG_enumerator:
1243 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1244 break;
1245 default:
1246 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1247 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1248 }
1249 }
1250 }
1251 return di->symt;
1252 }
1253
1254 /* structure used to pass information around when parsing a subprogram */
1255 typedef struct dwarf2_subprogram_s
1256 {
1257 dwarf2_parse_context_t* ctx;
1258 struct symt_compiland* compiland;
1259 struct symt_function* func;
1260 BOOL non_computed_variable;
1261 struct location frame;
1262 } dwarf2_subprogram_t;
1263
1264 /******************************************************************
1265 * dwarf2_parse_variable
1266 *
1267 * Parses any variable (parameter, local/global variable)
1268 */
1269 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1270 struct symt_block* block,
1271 dwarf2_debug_info_t* di)
1272 {
1273 struct symt* param_type;
1274 struct attribute name, value;
1275 struct location loc;
1276 BOOL is_pmt;
1277
1278 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1279
1280 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1281 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1282
1283 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1284 /* cannot do much without the name, the functions below won't like it. */
1285 return;
1286 }
1287 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1288 &loc, &subpgm->frame))
1289 {
1290 struct attribute ext;
1291
1292 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1293 name.u.string, loc.kind, loc.offset, loc.reg,
1294 dwarf2_debug_ctx(subpgm->ctx));
1295
1296 switch (loc.kind)
1297 {
1298 case loc_absolute:
1299 /* it's a global variable */
1300 /* FIXME: we don't handle its scope yet */
1301 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1302 ext.u.uvalue = 0;
1303 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1304 name.u.string, !ext.u.uvalue,
1305 subpgm->ctx->load_offset + loc.offset,
1306 0, param_type);
1307 break;
1308 default:
1309 subpgm->non_computed_variable = TRUE;
1310 /* fall through */
1311 case loc_register:
1312 case loc_regrel:
1313 /* either a pmt/variable relative to frame pointer or
1314 * pmt/variable in a register
1315 */
1316 assert(subpgm->func);
1317 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1318 is_pmt ? DataIsParam : DataIsLocal,
1319 &loc, block, param_type, name.u.string);
1320 break;
1321 }
1322 }
1323 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1324 {
1325 VARIANT v;
1326 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1327 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1328 switch (value.form)
1329 {
1330 case DW_FORM_data1:
1331 case DW_FORM_data2:
1332 case DW_FORM_data4:
1333 case DW_FORM_udata:
1334 v.n1.n2.vt = VT_UI4;
1335 v.n1.n2.n3.lVal = value.u.uvalue;
1336 break;
1337
1338 case DW_FORM_sdata:
1339 v.n1.n2.vt = VT_I4;
1340 v.n1.n2.n3.lVal = value.u.svalue;
1341 break;
1342
1343 case DW_FORM_strp:
1344 case DW_FORM_string:
1345 /* FIXME: native doesn't report const strings from here !!
1346 * however, the value of the string is in the code somewhere
1347 */
1348 v.n1.n2.vt = VT_I1 | VT_BYREF;
1349 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1350 break;
1351
1352 case DW_FORM_data8:
1353 case DW_FORM_block:
1354 case DW_FORM_block1:
1355 case DW_FORM_block2:
1356 case DW_FORM_block4:
1357
1358 default:
1359 FIXME("Unsupported form for const value %s (%lx)\n",
1360 name.u.string, value.form);
1361 v.n1.n2.vt = VT_EMPTY;
1362 }
1363 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1364 name.u.string, param_type, &v)->symt;
1365 }
1366 if (is_pmt && subpgm->func && subpgm->func->type)
1367 symt_add_function_signature_parameter(subpgm->ctx->module,
1368 (struct symt_function_signature*)subpgm->func->type,
1369 param_type);
1370
1371 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1372 }
1373
1374 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1375 dwarf2_debug_info_t* di)
1376 {
1377 struct attribute name;
1378 struct attribute low_pc;
1379 struct location loc;
1380
1381 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1382
1383 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1384 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1385 name.u.string = NULL;
1386
1387 loc.kind = loc_absolute;
1388 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1389 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1390 &loc, name.u.string);
1391 }
1392
1393 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1394 struct symt_block* parent_block,
1395 dwarf2_debug_info_t* di);
1396
1397 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1398 struct symt_block* parent_block,
1399 dwarf2_debug_info_t* di)
1400 {
1401 struct symt_block* block;
1402 struct attribute low_pc;
1403 struct attribute high_pc;
1404
1405 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1406
1407 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1408 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1409
1410 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1411 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1412 high_pc.u.uvalue - low_pc.u.uvalue);
1413
1414 if (di->abbrev->have_child) /** any interest to not have child ? */
1415 {
1416 dwarf2_debug_info_t** pchild = NULL;
1417 dwarf2_debug_info_t* child;
1418
1419 while ((pchild = vector_iter_up(&di->children, pchild)))
1420 {
1421 child = *pchild;
1422
1423 switch (child->abbrev->tag)
1424 {
1425 case DW_TAG_formal_parameter:
1426 case DW_TAG_variable:
1427 dwarf2_parse_variable(subpgm, block, child);
1428 break;
1429 case DW_TAG_lexical_block:
1430 dwarf2_parse_subprogram_block(subpgm, block, child);
1431 break;
1432 case DW_TAG_inlined_subroutine:
1433 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1434 break;
1435 case DW_TAG_label:
1436 dwarf2_parse_subprogram_label(subpgm, child);
1437 break;
1438 default:
1439 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1440 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1441 dwarf2_debug_di(di));
1442 }
1443 }
1444 }
1445 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1446 }
1447
1448 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1449 struct symt_block* parent_block,
1450 dwarf2_debug_info_t* di)
1451 {
1452 struct symt_block* block;
1453 struct attribute low_pc;
1454 struct attribute high_pc;
1455
1456 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1457
1458 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc))
1459 low_pc.u.uvalue = 0;
1460 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc))
1461 high_pc.u.uvalue = 0;
1462
1463 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1464 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1465 high_pc.u.uvalue - low_pc.u.uvalue);
1466
1467 if (di->abbrev->have_child) /** any interest to not have child ? */
1468 {
1469 dwarf2_debug_info_t** pchild = NULL;
1470 dwarf2_debug_info_t* child;
1471
1472 while ((pchild = vector_iter_up(&di->children, pchild)))
1473 {
1474 child = *pchild;
1475
1476 switch (child->abbrev->tag)
1477 {
1478 case DW_TAG_inlined_subroutine:
1479 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1480 break;
1481 case DW_TAG_variable:
1482 dwarf2_parse_variable(subpgm, block, child);
1483 break;
1484 case DW_TAG_lexical_block:
1485 dwarf2_parse_subprogram_block(subpgm, block, child);
1486 break;
1487 case DW_TAG_subprogram:
1488 /* FIXME: likely a declaration (to be checked)
1489 * skip it for now
1490 */
1491 break;
1492 case DW_TAG_formal_parameter:
1493 /* FIXME: likely elements for exception handling (GCC flavor)
1494 * Skip it for now
1495 */
1496 break;
1497 case DW_TAG_label:
1498 dwarf2_parse_subprogram_label(subpgm, child);
1499 break;
1500 case DW_TAG_class_type:
1501 case DW_TAG_structure_type:
1502 case DW_TAG_union_type:
1503 case DW_TAG_enumeration_type:
1504 case DW_TAG_typedef:
1505 /* the type referred to will be loaded when we need it, so skip it */
1506 break;
1507 default:
1508 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1509 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1510 }
1511 }
1512 }
1513
1514 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1515 }
1516
1517 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1518 dwarf2_debug_info_t* di,
1519 struct symt_compiland* compiland)
1520 {
1521 struct attribute name;
1522 struct attribute low_pc;
1523 struct attribute high_pc;
1524 struct attribute is_decl;
1525 struct attribute inline_flags;
1526 struct symt* ret_type;
1527 struct symt_function_signature* sig_type;
1528 dwarf2_subprogram_t subpgm;
1529
1530 if (di->symt) return di->symt;
1531
1532 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1533
1534 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1535 /* if it's an abstract representation of an inline function, there should be
1536 * a concrete object that we'll handle
1537 */
1538 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1539 {
1540 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1541 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1542 return NULL;
1543 }
1544
1545 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1546 if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1547 /* As functions (defined as inline assembly) get debug info with dwarf
1548 * (not the case for stabs), we just drop Wine's thunks here...
1549 * Actual thunks will be created in elf_module from the symbol table
1550 */
1551 if (elf_is_in_thunk_area(ctx->load_offset + low_pc.u.uvalue,
1552 ctx->thunks) >= 0)
1553 return NULL;
1554 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1555 is_decl.u.uvalue = 0;
1556
1557 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1558 ret_type = &symt_new_basic(ctx->module, btVoid, "void", 0)->symt;
1559
1560 /* FIXME: assuming C source code */
1561 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1562 if (!is_decl.u.uvalue)
1563 {
1564 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1565 ctx->load_offset + low_pc.u.uvalue,
1566 high_pc.u.uvalue - low_pc.u.uvalue,
1567 &sig_type->symt);
1568 di->symt = &subpgm.func->symt;
1569 }
1570 else subpgm.func = NULL;
1571
1572 subpgm.ctx = ctx;
1573 subpgm.compiland = compiland;
1574 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1575 &subpgm.frame, NULL))
1576 {
1577 /* on stack !! */
1578 subpgm.frame.kind = loc_regrel;
1579 subpgm.frame.reg = 0;
1580 subpgm.frame.offset = 0;
1581 }
1582 subpgm.non_computed_variable = FALSE;
1583
1584 if (di->abbrev->have_child) /** any interest to not have child ? */
1585 {
1586 dwarf2_debug_info_t** pchild = NULL;
1587 dwarf2_debug_info_t* child;
1588
1589 while ((pchild = vector_iter_up(&di->children, pchild)))
1590 {
1591 child = *pchild;
1592
1593 switch (child->abbrev->tag)
1594 {
1595 case DW_TAG_variable:
1596 case DW_TAG_formal_parameter:
1597 dwarf2_parse_variable(&subpgm, NULL, child);
1598 break;
1599 case DW_TAG_lexical_block:
1600 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1601 break;
1602 case DW_TAG_inlined_subroutine:
1603 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1604 break;
1605 case DW_TAG_subprogram:
1606 /* FIXME: likely a declaration (to be checked)
1607 * skip it for now
1608 */
1609 break;
1610 case DW_TAG_label:
1611 dwarf2_parse_subprogram_label(&subpgm, child);
1612 break;
1613 case DW_TAG_class_type:
1614 case DW_TAG_structure_type:
1615 case DW_TAG_union_type:
1616 case DW_TAG_enumeration_type:
1617 case DW_TAG_typedef:
1618 /* the type referred to will be loaded when we need it, so skip it */
1619 break;
1620 case DW_TAG_unspecified_parameters:
1621 /* FIXME: no support in dbghelp's internals so far */
1622 break;
1623 default:
1624 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1625 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1626 }
1627 }
1628 }
1629
1630 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1631 {
1632 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1633 &subpgm.frame, NULL);
1634 }
1635 symt_normalize_function(subpgm.ctx->module, subpgm.func);
1636
1637 return di->symt;
1638 }
1639
1640 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1641 dwarf2_debug_info_t* di)
1642 {
1643 struct symt* ret_type;
1644 struct symt_function_signature* sig_type;
1645
1646 if (di->symt) return di->symt;
1647
1648 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1649
1650 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1651 ret_type = &symt_new_basic(ctx->module, btVoid, "void", 0)->symt;
1652
1653 /* FIXME: assuming C source code */
1654 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1655
1656 if (di->abbrev->have_child) /** any interest to not have child ? */
1657 {
1658 dwarf2_debug_info_t** pchild = NULL;
1659 dwarf2_debug_info_t* child;
1660
1661 while ((pchild = vector_iter_up(&di->children, pchild)))
1662 {
1663 child = *pchild;
1664
1665 switch (child->abbrev->tag)
1666 {
1667 case DW_TAG_formal_parameter:
1668 symt_add_function_signature_parameter(ctx->module, sig_type,
1669 dwarf2_lookup_type(ctx, child));
1670 break;
1671 case DW_TAG_unspecified_parameters:
1672 WARN("Unsupported unspecified parameters\n");
1673 break;
1674 }
1675 }
1676 }
1677
1678 return di->symt = &sig_type->symt;
1679 }
1680
1681 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1682 dwarf2_debug_info_t* di,
1683 struct symt_compiland* compiland)
1684 {
1685 switch (di->abbrev->tag)
1686 {
1687 case DW_TAG_typedef:
1688 dwarf2_parse_typedef(ctx, di);
1689 break;
1690 case DW_TAG_base_type:
1691 dwarf2_parse_base_type(ctx, di);
1692 break;
1693 case DW_TAG_pointer_type:
1694 dwarf2_parse_pointer_type(ctx, di);
1695 break;
1696 case DW_TAG_class_type:
1697 dwarf2_parse_udt_type(ctx, di, UdtClass);
1698 break;
1699 case DW_TAG_structure_type:
1700 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1701 break;
1702 case DW_TAG_union_type:
1703 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1704 break;
1705 case DW_TAG_array_type:
1706 dwarf2_parse_array_type(ctx, di);
1707 break;
1708 case DW_TAG_const_type:
1709 dwarf2_parse_const_type(ctx, di);
1710 break;
1711 case DW_TAG_volatile_type:
1712 dwarf2_parse_volatile_type(ctx, di);
1713 break;
1714 case DW_TAG_reference_type:
1715 dwarf2_parse_reference_type(ctx, di);
1716 break;
1717 case DW_TAG_enumeration_type:
1718 dwarf2_parse_enumeration_type(ctx, di);
1719 break;
1720 case DW_TAG_subprogram:
1721 dwarf2_parse_subprogram(ctx, di, compiland);
1722 break;
1723 case DW_TAG_subroutine_type:
1724 dwarf2_parse_subroutine_type(ctx, di);
1725 break;
1726 case DW_TAG_variable:
1727 {
1728 dwarf2_subprogram_t subpgm;
1729
1730 subpgm.ctx = ctx;
1731 subpgm.compiland = compiland;
1732 subpgm.func = NULL;
1733 subpgm.frame.kind = loc_absolute;
1734 subpgm.frame.offset = 0;
1735 subpgm.frame.reg = Wine_DW_no_register;
1736 dwarf2_parse_variable(&subpgm, NULL, di);
1737 }
1738 break;
1739 default:
1740 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1741 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1742 }
1743 }
1744
1745 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1746 struct vector* v, unsigned file, unsigned line)
1747 {
1748 struct symt_function* func;
1749 struct symt_ht* symt;
1750 unsigned* psrc;
1751
1752 if (!file || !(psrc = vector_at(v, file - 1))) return;
1753
1754 TRACE("%s %lx %s %u\n",
1755 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
1756 if (!(symt = symt_find_nearest(module, address)) ||
1757 symt->symt.tag != SymTagFunction) return;
1758 func = (struct symt_function*)symt;
1759 symt_add_func_line(module, func, *psrc, line, address - func->address);
1760 }
1761
1762 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
1763 dwarf2_parse_context_t* ctx,
1764 const char* compile_dir,
1765 unsigned long offset)
1766 {
1767 dwarf2_traverse_context_t traverse;
1768 unsigned long length;
1769 unsigned version, header_len, insn_size, default_stmt;
1770 unsigned line_range, opcode_base;
1771 int line_base;
1772 const unsigned char* opcode_len;
1773 struct vector dirs;
1774 struct vector files;
1775 const char** p;
1776
1777 /* section with line numbers stripped */
1778 if (sections[section_line].address == ELF_NO_MAP)
1779 return FALSE;
1780
1781 traverse.data = sections[section_line].address + offset;
1782 traverse.start_data = traverse.data;
1783 traverse.end_data = traverse.data + 4;
1784 traverse.word_size = ctx->word_size;
1785
1786 length = dwarf2_parse_u4(&traverse);
1787 traverse.end_data = traverse.start_data + length;
1788
1789 version = dwarf2_parse_u2(&traverse);
1790 header_len = dwarf2_parse_u4(&traverse);
1791 insn_size = dwarf2_parse_byte(&traverse);
1792 default_stmt = dwarf2_parse_byte(&traverse);
1793 line_base = (signed char)dwarf2_parse_byte(&traverse);
1794 line_range = dwarf2_parse_byte(&traverse);
1795 opcode_base = dwarf2_parse_byte(&traverse);
1796
1797 opcode_len = traverse.data;
1798 traverse.data += opcode_base - 1;
1799
1800 vector_init(&dirs, sizeof(const char*), 4);
1801 p = vector_add(&dirs, &ctx->pool);
1802 *p = compile_dir ? compile_dir : ".";
1803 while (*traverse.data)
1804 {
1805 const char* rel = (const char*)traverse.data;
1806 unsigned rellen = strlen(rel);
1807 TRACE("Got include %s\n", rel);
1808 traverse.data += rellen + 1;
1809 p = vector_add(&dirs, &ctx->pool);
1810
1811 if (*rel == '/' || !compile_dir)
1812 *p = rel;
1813 else
1814 {
1815 /* include directory relative to compile directory */
1816 unsigned baselen = strlen(compile_dir);
1817 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
1818 strcpy(tmp, compile_dir);
1819 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
1820 strcpy(&tmp[baselen], rel);
1821 *p = tmp;
1822 }
1823
1824 }
1825 traverse.data++;
1826
1827 vector_init(&files, sizeof(unsigned), 16);
1828 while (*traverse.data)
1829 {
1830 unsigned int dir_index, mod_time, length;
1831 const char* name;
1832 const char* dir;
1833 unsigned* psrc;
1834
1835 name = (const char*)traverse.data;
1836 traverse.data += strlen(name) + 1;
1837 dir_index = dwarf2_leb128_as_unsigned(&traverse);
1838 mod_time = dwarf2_leb128_as_unsigned(&traverse);
1839 length = dwarf2_leb128_as_unsigned(&traverse);
1840 dir = *(const char**)vector_at(&dirs, dir_index);
1841 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
1842 psrc = vector_add(&files, &ctx->pool);
1843 *psrc = source_new(ctx->module, dir, name);
1844 }
1845 traverse.data++;
1846
1847 while (traverse.data < traverse.end_data)
1848 {
1849 unsigned long address = 0;
1850 unsigned file = 1;
1851 unsigned line = 1;
1852 unsigned is_stmt = default_stmt;
1853 BOOL basic_block = FALSE, end_sequence = FALSE;
1854 unsigned opcode, extopcode, i;
1855
1856 while (!end_sequence)
1857 {
1858 opcode = dwarf2_parse_byte(&traverse);
1859 TRACE("Got opcode %x\n", opcode);
1860
1861 if (opcode >= opcode_base)
1862 {
1863 unsigned delta = opcode - opcode_base;
1864
1865 address += (delta / line_range) * insn_size;
1866 line += line_base + (delta % line_range);
1867 basic_block = TRUE;
1868 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1869 }
1870 else
1871 {
1872 switch (opcode)
1873 {
1874 case DW_LNS_copy:
1875 basic_block = FALSE;
1876 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1877 break;
1878 case DW_LNS_advance_pc:
1879 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
1880 break;
1881 case DW_LNS_advance_line:
1882 line += dwarf2_leb128_as_signed(&traverse);
1883 break;
1884 case DW_LNS_set_file:
1885 file = dwarf2_leb128_as_unsigned(&traverse);
1886 break;
1887 case DW_LNS_set_column:
1888 dwarf2_leb128_as_unsigned(&traverse);
1889 break;
1890 case DW_LNS_negate_stmt:
1891 is_stmt = !is_stmt;
1892 break;
1893 case DW_LNS_set_basic_block:
1894 basic_block = 1;
1895 break;
1896 case DW_LNS_const_add_pc:
1897 address += ((255 - opcode_base) / line_range) * insn_size;
1898 break;
1899 case DW_LNS_fixed_advance_pc:
1900 address += dwarf2_parse_u2(&traverse);
1901 break;
1902 case DW_LNS_extended_op:
1903 dwarf2_leb128_as_unsigned(&traverse);
1904 extopcode = dwarf2_parse_byte(&traverse);
1905 switch (extopcode)
1906 {
1907 case DW_LNE_end_sequence:
1908 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1909 end_sequence = TRUE;
1910 break;
1911 case DW_LNE_set_address:
1912 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
1913 break;
1914 case DW_LNE_define_file:
1915 FIXME("not handled %s\n", traverse.data);
1916 traverse.data += strlen((const char *)traverse.data) + 1;
1917 dwarf2_leb128_as_unsigned(&traverse);
1918 dwarf2_leb128_as_unsigned(&traverse);
1919 dwarf2_leb128_as_unsigned(&traverse);
1920 break;
1921 default:
1922 FIXME("Unsupported extended opcode %x\n", extopcode);
1923 break;
1924 }
1925 break;
1926 default:
1927 WARN("Unsupported opcode %x\n", opcode);
1928 for (i = 0; i < opcode_len[opcode]; i++)
1929 dwarf2_leb128_as_unsigned(&traverse);
1930 break;
1931 }
1932 }
1933 }
1934 }
1935 return TRUE;
1936 }
1937
1938 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
1939 const dwarf2_comp_unit_t* comp_unit,
1940 struct module* module,
1941 const struct elf_thunk_area* thunks,
1942 const unsigned char* comp_unit_cursor,
1943 unsigned long load_offset)
1944 {
1945 dwarf2_parse_context_t ctx;
1946 dwarf2_traverse_context_t traverse;
1947 dwarf2_traverse_context_t abbrev_ctx;
1948 dwarf2_debug_info_t* di;
1949 BOOL ret = FALSE;
1950
1951 TRACE("Compilation Unit Header found at 0x%x:\n",
1952 comp_unit_cursor - sections[section_debug].address);
1953 TRACE("- length: %lu\n", comp_unit->length);
1954 TRACE("- version: %u\n", comp_unit->version);
1955 TRACE("- abbrev_offset: %lu\n", comp_unit->abbrev_offset);
1956 TRACE("- word_size: %u\n", comp_unit->word_size);
1957
1958 if (comp_unit->version != 2)
1959 {
1960 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
1961 comp_unit->version);
1962 return FALSE;
1963 }
1964
1965 pool_init(&ctx.pool, 65536);
1966 ctx.sections = sections;
1967 ctx.section = section_debug;
1968 ctx.module = module;
1969 ctx.word_size = comp_unit->word_size;
1970 ctx.thunks = thunks;
1971 ctx.load_offset = load_offset;
1972 ctx.ref_offset = comp_unit_cursor - sections[section_debug].address;
1973
1974 traverse.start_data = comp_unit_cursor + sizeof(dwarf2_comp_unit_stream_t);
1975 traverse.data = traverse.start_data;
1976 traverse.word_size = comp_unit->word_size;
1977 traverse.end_data = comp_unit_cursor + comp_unit->length + sizeof(unsigned);
1978
1979 abbrev_ctx.start_data = sections[section_abbrev].address + comp_unit->abbrev_offset;
1980 abbrev_ctx.data = abbrev_ctx.start_data;
1981 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
1982 abbrev_ctx.word_size = comp_unit->word_size;
1983 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
1984
1985 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
1986 dwarf2_read_one_debug_info(&ctx, &traverse, &di);
1987
1988 if (di->abbrev->tag == DW_TAG_compile_unit)
1989 {
1990 struct attribute name;
1991 dwarf2_debug_info_t** pdi = NULL;
1992 struct attribute stmt_list, low_pc;
1993 struct attribute comp_dir;
1994
1995 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
1996 name.u.string = NULL;
1997
1998 /* get working directory of current compilation unit */
1999 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2000 comp_dir.u.string = NULL;
2001
2002 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2003 low_pc.u.uvalue = 0;
2004 di->symt = &symt_new_compiland(module,
2005 ctx.load_offset + low_pc.u.uvalue,
2006 source_new(module, comp_dir.u.string, name.u.string))->symt;
2007
2008 if (di->abbrev->have_child)
2009 {
2010 while ((pdi = vector_iter_up(&di->children, pdi)))
2011 {
2012 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2013 }
2014 }
2015 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2016 {
2017 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2018 module->module.LineNumbers = TRUE;
2019 }
2020 ret = TRUE;
2021 }
2022 else FIXME("Should have a compilation unit here\n");
2023 pool_destroy(&ctx.pool);
2024 return ret;
2025 }
2026
2027 static BOOL dwarf2_lookup_loclist(const struct module* module, const BYTE* start,
2028 unsigned long ip,
2029 dwarf2_traverse_context_t* lctx)
2030 {
2031 DWORD beg, end;
2032 const BYTE* ptr = start;
2033 DWORD len;
2034
2035 while (ptr < module->dwarf2_info->debug_loc.address + module->dwarf2_info->debug_loc.size)
2036 {
2037 beg = dwarf2_get_u4(ptr); ptr += 4;
2038 end = dwarf2_get_u4(ptr); ptr += 4;
2039 if (!beg && !end) break;
2040 len = dwarf2_get_u2(ptr); ptr += 2;
2041
2042 if (beg <= ip && ip < end)
2043 {
2044 lctx->data = ptr;
2045 lctx->end_data = ptr + len;
2046 lctx->word_size = 4; /* FIXME word size !!! */
2047 return TRUE;
2048 }
2049 ptr += len;
2050 }
2051 WARN("Couldn't find ip in location list\n");
2052 return FALSE;
2053 }
2054
2055 static enum location_error loc_compute_frame(struct process* pcs,
2056 const struct module* module,
2057 const struct symt_function* func,
2058 DWORD ip, struct location* frame)
2059 {
2060 struct symt** psym = NULL;
2061 struct location* pframe;
2062 dwarf2_traverse_context_t lctx;
2063 enum location_error err;
2064
2065 while ((psym = vector_iter_up(&func->vchildren, psym)))
2066 {
2067 if ((*psym)->tag == SymTagCustom)
2068 {
2069 pframe = &((struct symt_function_point*)*psym)->loc;
2070
2071 /* First, recompute the frame information, if needed */
2072 switch (pframe->kind)
2073 {
2074 case loc_regrel:
2075 case loc_register:
2076 *frame = *pframe;
2077 break;
2078 case loc_dwarf2_location_list:
2079 WARN("Searching loclist for %s\n", func->hash_elt.name);
2080 if (!dwarf2_lookup_loclist(module,
2081 module->dwarf2_info->debug_loc.address + pframe->offset,
2082 ip, &lctx))
2083 return loc_err_out_of_scope;
2084 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2085 if (frame->kind >= loc_user)
2086 {
2087 WARN("Couldn't compute runtime frame location\n");
2088 return loc_err_too_complex;
2089 }
2090 break;
2091 default:
2092 WARN("Unsupported frame kind %d\n", pframe->kind);
2093 return loc_err_internal;
2094 }
2095 return 0;
2096 }
2097 }
2098 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2099 return loc_err_internal;
2100 }
2101
2102 static void dwarf2_location_compute(struct process* pcs,
2103 const struct module* module,
2104 const struct symt_function* func,
2105 struct location* loc)
2106 {
2107 struct location frame;
2108 DWORD ip;
2109 int err;
2110 dwarf2_traverse_context_t lctx;
2111
2112 if (!func->container || func->container->tag != SymTagCompiland)
2113 {
2114 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
2115 err = loc_err_internal;
2116 }
2117 else
2118 {
2119 /* instruction pointer relative to compiland's start */
2120 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
2121
2122 if ((err = loc_compute_frame(pcs, module, func, ip, &frame)) == 0)
2123 {
2124 switch (loc->kind)
2125 {
2126 case loc_dwarf2_location_list:
2127 /* Then, if the variable has a location list, find it !! */
2128 if (dwarf2_lookup_loclist(module,
2129 module->dwarf2_info->debug_loc.address + loc->offset,
2130 ip, &lctx))
2131 goto do_compute;
2132 err = loc_err_out_of_scope;
2133 break;
2134 case loc_dwarf2_block:
2135 /* or if we have a copy of an existing block, get ready for it */
2136 {
2137 unsigned* ptr = (unsigned*)loc->offset;
2138
2139 lctx.data = (const BYTE*)(ptr + 1);
2140 lctx.end_data = lctx.data + *ptr;
2141 lctx.word_size = 4; /* FIXME !! */
2142 }
2143 do_compute:
2144 /* now get the variable */
2145 err = compute_location(&lctx, loc, pcs->handle, &frame);
2146 break;
2147 case loc_register:
2148 case loc_regrel:
2149 /* nothing to do */
2150 break;
2151 default:
2152 WARN("Unsupported local kind %d\n", loc->kind);
2153 err = loc_err_internal;
2154 }
2155 }
2156 }
2157 if (err < 0)
2158 {
2159 loc->kind = loc_register;
2160 loc->reg = err;
2161 }
2162 }
2163
2164 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
2165 const struct elf_thunk_area* thunks,
2166 const unsigned char* debug, unsigned int debug_size,
2167 const unsigned char* abbrev, unsigned int abbrev_size,
2168 const unsigned char* str, unsigned int str_size,
2169 const unsigned char* line, unsigned int line_size,
2170 const unsigned char* loclist, unsigned int loclist_size)
2171 {
2172 dwarf2_section_t section[section_max];
2173 unsigned char* ptr;
2174 const unsigned char*comp_unit_cursor = debug;
2175 const unsigned char*end_debug = debug + debug_size;
2176
2177 module->loc_compute = dwarf2_location_compute;
2178
2179 section[section_debug].address = debug;
2180 section[section_debug].size = debug_size;
2181 section[section_abbrev].address = abbrev;
2182 section[section_abbrev].size = abbrev_size;
2183 section[section_string].address = str;
2184 section[section_string].size = str_size;
2185 section[section_line].address = line;
2186 section[section_line].size = line_size;
2187
2188 if (loclist_size)
2189 {
2190 /* initialize the dwarf2 specific info block for this module.
2191 * As we'll need later on the .debug_loc section content, we copy it in
2192 * the module structure for later reuse
2193 */
2194 module->dwarf2_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*module->dwarf2_info) + loclist_size);
2195 if (!module->dwarf2_info) return FALSE;
2196 ptr = (unsigned char*)(module->dwarf2_info + 1);
2197 memcpy(ptr, loclist, loclist_size);
2198 module->dwarf2_info->debug_loc.address = ptr;
2199 module->dwarf2_info->debug_loc.size = loclist_size;
2200 }
2201
2202 while (comp_unit_cursor < end_debug)
2203 {
2204 const dwarf2_comp_unit_stream_t* comp_unit_stream;
2205 dwarf2_comp_unit_t comp_unit;
2206
2207 comp_unit_stream = (const dwarf2_comp_unit_stream_t*) comp_unit_cursor;
2208 comp_unit.length = *(unsigned long*) comp_unit_stream->length;
2209 comp_unit.version = *(unsigned short*) comp_unit_stream->version;
2210 comp_unit.abbrev_offset = *(unsigned long*) comp_unit_stream->abbrev_offset;
2211 comp_unit.word_size = *(unsigned char*) comp_unit_stream->word_size;
2212
2213 dwarf2_parse_compilation_unit(section, &comp_unit, module,
2214 thunks, comp_unit_cursor, load_offset);
2215 comp_unit_cursor += comp_unit.length + sizeof(unsigned);
2216 }
2217 module->module.SymType = SymDia;
2218 module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
2219 /* FIXME: we could have a finer grain here */
2220 module->module.GlobalSymbols = TRUE;
2221 module->module.TypeInfo = TRUE;
2222 module->module.SourceIndexed = TRUE;
2223 module->module.Publics = TRUE;
2224 return TRUE;
2225 }
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