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dplayx: Adjust GetCaps behaviour to documentation
[wine/gsoc_dplay.git] / dlls / dbghelp / dwarf.c
blob7843e679330a60ba1b39f612d6debf068f566ca4
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 #define NONAMELESSUNION
23
24 #include "config.h"
25
26 #include <sys/types.h>
27 #include <fcntl.h>
28 #ifdef HAVE_SYS_STAT_H
29 # include <sys/stat.h>
30 #endif
31 #ifdef HAVE_SYS_MMAN_H
32 #include <sys/mman.h>
33 #endif
34 #include <limits.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #ifdef HAVE_UNISTD_H
38 # include <unistd.h>
39 #endif
40 #include <stdio.h>
41 #ifndef PATH_MAX
42 #define PATH_MAX MAX_PATH
43 #endif
44 #include <assert.h>
45 #include <stdarg.h>
46
47 #include "windef.h"
48 #include "winbase.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 = 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 /* symt_cache indexes */
173 #define sc_void 0
174 #define sc_int1 1
175 #define sc_int2 2
176 #define sc_int4 3
177 #define sc_num 4
178
179 typedef struct dwarf2_parse_context_s
180 {
181 const dwarf2_section_t* sections;
182 unsigned section;
183 struct pool pool;
184 struct module* module;
185 const struct elf_thunk_area*thunks;
186 struct sparse_array abbrev_table;
187 struct sparse_array debug_info_table;
188 unsigned long load_offset;
189 unsigned long ref_offset;
190 unsigned char word_size;
191 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */
192 } dwarf2_parse_context_t;
193
194 /* stored in the dbghelp's module internal structure for later reuse */
195 struct dwarf2_module_info_s
196 {
197 dwarf2_section_t debug_loc;
198 };
199
200 #define loc_dwarf2_location_list (loc_user + 0)
201 #define loc_dwarf2_block (loc_user + 1)
202
203 /* forward declarations */
204 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry);
205
206 static unsigned char dwarf2_get_byte(const unsigned char* ptr)
207 {
208 return *ptr;
209 }
210
211 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx)
212 {
213 unsigned char uvalue = dwarf2_get_byte(ctx->data);
214 ctx->data += 1;
215 return uvalue;
216 }
217
218 static unsigned short dwarf2_get_u2(const unsigned char* ptr)
219 {
220 return *(const unsigned short*)ptr;
221 }
222
223 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx)
224 {
225 unsigned short uvalue = dwarf2_get_u2(ctx->data);
226 ctx->data += 2;
227 return uvalue;
228 }
229
230 static unsigned long dwarf2_get_u4(const unsigned char* ptr)
231 {
232 return *(const unsigned long*)ptr;
233 }
234
235 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx)
236 {
237 unsigned long uvalue = dwarf2_get_u4(ctx->data);
238 ctx->data += 4;
239 return uvalue;
240 }
241
242 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end)
243 {
244 unsigned long ret = 0;
245 unsigned char byte;
246 unsigned shift = 0;
247
248 do
249 {
250 byte = dwarf2_get_byte(ptr++);
251 ret |= (byte & 0x7f) << shift;
252 shift += 7;
253 } while (byte & 0x80);
254
255 if (end) *end = ptr;
256 return ret;
257 }
258
259 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx)
260 {
261 unsigned long ret;
262
263 assert(ctx);
264
265 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data);
266
267 return ret;
268 }
269
270 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end)
271 {
272 long ret = 0;
273 unsigned char byte;
274 unsigned shift = 0;
275 const unsigned size = sizeof(int) * 8;
276
277 do
278 {
279 byte = dwarf2_get_byte(ptr++);
280 ret |= (byte & 0x7f) << shift;
281 shift += 7;
282 } while (byte & 0x80);
283 if (end) *end = ptr;
284
285 /* as spec: sign bit of byte is 2nd high order bit (80x40)
286 * -> 0x80 is used as flag.
287 */
288 if ((shift < size) && (byte & 0x40))
289 {
290 ret |= - (1 << shift);
291 }
292 return ret;
293 }
294
295 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx)
296 {
297 long ret = 0;
298
299 assert(ctx);
300
301 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data);
302 return ret;
303 }
304
305 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx)
306 {
307 unsigned ret;
308 for (ret = 0; ctx->data[ret] & 0x80; ret++);
309 return ret + 1;
310 }
311
312 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size)
313 {
314 unsigned long ret;
315
316 switch (word_size)
317 {
318 case 4:
319 ret = dwarf2_get_u4(ptr);
320 break;
321 default:
322 FIXME("Unsupported Word Size %u\n", word_size);
323 ret = 0;
324 }
325 return ret;
326 }
327
328 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx)
329 {
330 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size);
331 ctx->data += ctx->word_size;
332 return ret;
333 }
334
335 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx)
336 {
337 return wine_dbg_sprintf("ctx(%p)", ctx->data);
338 }
339
340 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx)
341 {
342 return wine_dbg_sprintf("ctx(%p,%s)",
343 ctx, debugstr_w(ctx->module->module.ModuleName));
344 }
345
346 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di)
347 {
348 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)",
349 di->abbrev, di->symt);
350 }
351
352 static dwarf2_abbrev_entry_t*
353 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table,
354 unsigned long entry_code)
355 {
356 assert( NULL != abbrev_table );
357 return sparse_array_find(abbrev_table, entry_code);
358 }
359
360 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx,
361 struct sparse_array* abbrev_table,
362 struct pool* pool)
363 {
364 unsigned long entry_code;
365 dwarf2_abbrev_entry_t* abbrev_entry;
366 dwarf2_abbrev_entry_attr_t* new = NULL;
367 dwarf2_abbrev_entry_attr_t* last = NULL;
368 unsigned long attribute;
369 unsigned long form;
370
371 assert( NULL != abbrev_ctx );
372
373 TRACE("%s, end at %p\n",
374 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data);
375
376 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32);
377 while (abbrev_ctx->data < abbrev_ctx->end_data)
378 {
379 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
380 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx);
381 TRACE("found entry_code %lu\n", entry_code);
382 if (!entry_code)
383 {
384 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx));
385 break;
386 }
387 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool);
388 assert( NULL != abbrev_entry );
389
390 abbrev_entry->entry_code = entry_code;
391 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx);
392 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx);
393 abbrev_entry->attrs = NULL;
394 abbrev_entry->num_attr = 0;
395
396 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n",
397 abbrev_table, sparse_array_length(abbrev_table),
398 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry);
399
400 last = NULL;
401 while (1)
402 {
403 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx);
404 form = dwarf2_leb128_as_unsigned(abbrev_ctx);
405 if (!attribute) break;
406
407 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t));
408 assert(new);
409
410 new->attribute = attribute;
411 new->form = form;
412 new->next = NULL;
413 if (abbrev_entry->attrs) last->next = new;
414 else abbrev_entry->attrs = new;
415 last = new;
416 abbrev_entry->num_attr++;
417 }
418 }
419 TRACE("found %u entries\n", sparse_array_length(abbrev_table));
420 }
421
422 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx,
423 const dwarf2_abbrev_entry_attr_t* abbrev_attr)
424 {
425 unsigned step;
426
427 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form);
428
429 switch (abbrev_attr->form)
430 {
431 case DW_FORM_ref_addr:
432 case DW_FORM_addr: step = ctx->word_size; break;
433 case DW_FORM_flag:
434 case DW_FORM_data1:
435 case DW_FORM_ref1: step = 1; break;
436 case DW_FORM_data2:
437 case DW_FORM_ref2: step = 2; break;
438 case DW_FORM_data4:
439 case DW_FORM_ref4:
440 case DW_FORM_strp: step = 4; break;
441 case DW_FORM_data8:
442 case DW_FORM_ref8: step = 8; break;
443 case DW_FORM_sdata:
444 case DW_FORM_ref_udata:
445 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break;
446 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break;
447 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break;
448 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break;
449 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break;
450 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break;
451 default:
452 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
453 return;
454 }
455 ctx->data += step;
456 }
457
458 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx,
459 const dwarf2_abbrev_entry_attr_t* abbrev_attr,
460 const unsigned char* data,
461 struct attribute* attr)
462 {
463 attr->form = abbrev_attr->form;
464 switch (attr->form)
465 {
466 case DW_FORM_ref_addr:
467 case DW_FORM_addr:
468 attr->u.uvalue = dwarf2_get_addr(data, ctx->word_size);
469 TRACE("addr<0x%lx>\n", attr->u.uvalue);
470 break;
471
472 case DW_FORM_flag:
473 attr->u.uvalue = dwarf2_get_byte(data);
474 TRACE("flag<0x%lx>\n", attr->u.uvalue);
475 break;
476
477 case DW_FORM_data1:
478 attr->u.uvalue = dwarf2_get_byte(data);
479 TRACE("data1<%lu>\n", attr->u.uvalue);
480 break;
481
482 case DW_FORM_data2:
483 attr->u.uvalue = dwarf2_get_u2(data);
484 TRACE("data2<%lu>\n", attr->u.uvalue);
485 break;
486
487 case DW_FORM_data4:
488 attr->u.uvalue = dwarf2_get_u4(data);
489 TRACE("data4<%lu>\n", attr->u.uvalue);
490 break;
491
492 case DW_FORM_data8:
493 FIXME("Unhandled 64bits support\n");
494 break;
495
496 case DW_FORM_ref1:
497 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data);
498 TRACE("ref1<0x%lx>\n", attr->u.uvalue);
499 break;
500
501 case DW_FORM_ref2:
502 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data);
503 TRACE("ref2<0x%lx>\n", attr->u.uvalue);
504 break;
505
506 case DW_FORM_ref4:
507 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data);
508 TRACE("ref4<0x%lx>\n", attr->u.uvalue);
509 break;
510
511 case DW_FORM_ref8:
512 FIXME("Unhandled 64 bit support\n");
513 break;
514
515 case DW_FORM_sdata:
516 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL);
517 break;
518
519 case DW_FORM_ref_udata:
520 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
521 break;
522
523 case DW_FORM_udata:
524 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL);
525 break;
526
527 case DW_FORM_string:
528 attr->u.string = (const char *)data;
529 TRACE("string<%s>\n", attr->u.string);
530 break;
531
532 case DW_FORM_strp:
533 {
534 unsigned long offset = dwarf2_get_u4(data);
535 attr->u.string = (const char*)ctx->sections[section_string].address + offset;
536 }
537 TRACE("strp<%s>\n", attr->u.string);
538 break;
539
540 case DW_FORM_block:
541 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr);
542 break;
543
544 case DW_FORM_block1:
545 attr->u.block.size = dwarf2_get_byte(data);
546 attr->u.block.ptr = data + 1;
547 break;
548
549 case DW_FORM_block2:
550 attr->u.block.size = dwarf2_get_u2(data);
551 attr->u.block.ptr = data + 2;
552 break;
553
554 case DW_FORM_block4:
555 attr->u.block.size = dwarf2_get_u4(data);
556 attr->u.block.ptr = data + 4;
557 break;
558
559 default:
560 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form);
561 break;
562 }
563 }
564
565 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx,
566 const dwarf2_debug_info_t* di,
567 unsigned at, struct attribute* attr)
568 {
569 unsigned i, ai = 0;
570 dwarf2_abbrev_entry_attr_t* abbrev_attr;
571 dwarf2_abbrev_entry_attr_t* abstract_abbrev_attr;
572
573 while (di)
574 {
575 abstract_abbrev_attr = NULL;
576 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next)
577 {
578 if (abbrev_attr->attribute == at)
579 {
580 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr);
581 return TRUE;
582 }
583 if (abbrev_attr->attribute == DW_AT_abstract_origin &&
584 at != DW_AT_sibling)
585 {
586 abstract_abbrev_attr = abbrev_attr;
587 ai = i;
588 }
589 }
590 /* do we have an abstract origin debug entry to look into ? */
591 if (!abstract_abbrev_attr) break;
592 dwarf2_fill_attr(ctx, abstract_abbrev_attr, di->data[ai], attr);
593 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue)))
594 FIXME("Should have found the debug info entry\n");
595 }
596 return FALSE;
597 }
598
599 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*,
600 struct symt_compiland*);
601
602 #define Wine_DW_no_register 0x7FFFFFFF
603
604 static unsigned dwarf2_map_register(int regno)
605 {
606 unsigned reg;
607
608 switch (regno)
609 {
610 case Wine_DW_no_register: FIXME("What the heck map reg 0x%x\n",regno); reg = 0; break;
611 case 0: reg = CV_REG_EAX; break;
612 case 1: reg = CV_REG_ECX; break;
613 case 2: reg = CV_REG_EDX; break;
614 case 3: reg = CV_REG_EBX; break;
615 case 4: reg = CV_REG_ESP; break;
616 case 5: reg = CV_REG_EBP; break;
617 case 6: reg = CV_REG_ESI; break;
618 case 7: reg = CV_REG_EDI; break;
619 case 8: reg = CV_REG_EIP; break;
620 case 9: reg = CV_REG_EFLAGS; break;
621 case 10: reg = CV_REG_CS; break;
622 case 11: reg = CV_REG_SS; break;
623 case 12: reg = CV_REG_DS; break;
624 case 13: reg = CV_REG_ES; break;
625 case 14: reg = CV_REG_FS; break;
626 case 15: reg = CV_REG_GS; break;
627 case 16: case 17: case 18: case 19:
628 case 20: case 21: case 22: case 23:
629 reg = CV_REG_ST0 + regno - 16; break;
630 case 24: reg = CV_REG_CTRL; break;
631 case 25: reg = CV_REG_STAT; break;
632 case 26: reg = CV_REG_TAG; break;
633 /*
634 reg: fiseg 27
635 reg: fioff 28
636 reg: foseg 29
637 reg: fooff 30
638 reg: fop 31
639 */
640 case 32: case 33: case 34: case 35:
641 case 36: case 37: case 38: case 39:
642 reg = CV_REG_XMM0 + regno - 32; break;
643 case 40: reg = CV_REG_MXCSR; break;
644 default:
645 FIXME("Don't know how to map register %d\n", regno);
646 return 0;
647 }
648 return reg;
649 }
650
651 static enum location_error
652 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc,
653 HANDLE hproc, const struct location* frame)
654 {
655 unsigned long stack[64];
656 unsigned stk;
657 unsigned char op;
658 BOOL piece_found = FALSE;
659
660 stack[stk = 0] = 0;
661
662 loc->kind = loc_absolute;
663 loc->reg = Wine_DW_no_register;
664
665 while (ctx->data < ctx->end_data)
666 {
667 op = dwarf2_parse_byte(ctx);
668 switch (op)
669 {
670 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break;
671 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break;
672 case DW_OP_const1s: stack[++stk] = (long)(signed char)dwarf2_parse_byte(ctx); break;
673 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break;
674 case DW_OP_const2s: stack[++stk] = (long)(short)dwarf2_parse_u2(ctx); break;
675 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break;
676 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break;
677 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break;
678 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break;
679 case DW_OP_plus_uconst:
680 stack[stk] += dwarf2_leb128_as_unsigned(ctx); break;
681 case DW_OP_reg0: case DW_OP_reg1: case DW_OP_reg2: case DW_OP_reg3:
682 case DW_OP_reg4: case DW_OP_reg5: case DW_OP_reg6: case DW_OP_reg7:
683 case DW_OP_reg8: case DW_OP_reg9: case DW_OP_reg10: case DW_OP_reg11:
684 case DW_OP_reg12: case DW_OP_reg13: case DW_OP_reg14: case DW_OP_reg15:
685 case DW_OP_reg16: case DW_OP_reg17: case DW_OP_reg18: case DW_OP_reg19:
686 case DW_OP_reg20: case DW_OP_reg21: case DW_OP_reg22: case DW_OP_reg23:
687 case DW_OP_reg24: case DW_OP_reg25: case DW_OP_reg26: case DW_OP_reg27:
688 case DW_OP_reg28: case DW_OP_reg29: case DW_OP_reg30: case DW_OP_reg31:
689 /* dbghelp APIs don't know how to cope with this anyway
690 * (for example 'long long' stored in two registers)
691 * FIXME: We should tell winedbg how to deal with it (sigh)
692 */
693 if (!piece_found)
694 {
695 if (loc->reg != Wine_DW_no_register)
696 FIXME("Only supporting one reg (%d -> %d)\n",
697 loc->reg, dwarf2_map_register(op - DW_OP_reg0));
698 loc->reg = dwarf2_map_register(op - DW_OP_reg0);
699 }
700 loc->kind = loc_register;
701 break;
702 case DW_OP_breg0: case DW_OP_breg1: case DW_OP_breg2: case DW_OP_breg3:
703 case DW_OP_breg4: case DW_OP_breg5: case DW_OP_breg6: case DW_OP_breg7:
704 case DW_OP_breg8: case DW_OP_breg9: case DW_OP_breg10: case DW_OP_breg11:
705 case DW_OP_breg12: case DW_OP_breg13: case DW_OP_breg14: case DW_OP_breg15:
706 case DW_OP_breg16: case DW_OP_breg17: case DW_OP_breg18: case DW_OP_breg19:
707 case DW_OP_breg20: case DW_OP_breg21: case DW_OP_breg22: case DW_OP_breg23:
708 case DW_OP_breg24: case DW_OP_breg25: case DW_OP_breg26: case DW_OP_breg27:
709 case DW_OP_breg28: case DW_OP_breg29: case DW_OP_breg30: case DW_OP_breg31:
710 /* dbghelp APIs don't know how to cope with this anyway
711 * (for example 'long long' stored in two registers)
712 * FIXME: We should tell winedbg how to deal with it (sigh)
713 */
714 if (!piece_found)
715 {
716 if (loc->reg != Wine_DW_no_register)
717 FIXME("Only supporting one reg (%d -> %d)\n",
718 loc->reg, dwarf2_map_register(op - DW_OP_breg0));
719 loc->reg = dwarf2_map_register(op - DW_OP_breg0);
720 }
721 stack[++stk] = dwarf2_leb128_as_signed(ctx);
722 loc->kind = loc_regrel;
723 break;
724 case DW_OP_fbreg:
725 if (loc->reg != Wine_DW_no_register)
726 FIXME("Only supporting one reg (%d -> -2)\n", loc->reg);
727 if (frame && frame->kind == loc_register)
728 {
729 loc->kind = loc_regrel;
730 loc->reg = frame->reg;
731 stack[++stk] = dwarf2_leb128_as_signed(ctx);
732 }
733 else if (frame && frame->kind == loc_regrel)
734 {
735 loc->kind = loc_regrel;
736 loc->reg = frame->reg;
737 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset;
738 }
739 else
740 {
741 /* FIXME: this could be later optimized by not recomputing
742 * this very location expression
743 */
744 loc->kind = loc_dwarf2_block;
745 stack[++stk] = dwarf2_leb128_as_signed(ctx);
746 }
747 break;
748 case DW_OP_piece:
749 {
750 unsigned sz = dwarf2_leb128_as_unsigned(ctx);
751 WARN("Not handling OP_piece (size=%d)\n", sz);
752 piece_found = TRUE;
753 }
754 break;
755 case DW_OP_deref:
756 if (!stk)
757 {
758 FIXME("Unexpected empty stack\n");
759 return loc_err_internal;
760 }
761 if (loc->reg != Wine_DW_no_register)
762 {
763 WARN("Too complex expression for deref\n");
764 return loc_err_too_complex;
765 }
766 if (hproc)
767 {
768 DWORD addr = stack[stk--];
769 DWORD deref;
770
771 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL))
772 {
773 WARN("Couldn't read memory at %x\n", addr);
774 return loc_err_cant_read;
775 }
776 stack[++stk] = deref;
777 }
778 else
779 {
780 loc->kind = loc_dwarf2_block;
781 }
782 break;
783 default:
784 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */
785 FIXME("Unhandled attr op: %x\n", op);
786 /* FIXME else unhandled extension */
787 return loc_err_internal;
788 }
789 }
790 loc->offset = stack[stk];
791 return 0;
792 }
793
794 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx,
795 const dwarf2_debug_info_t* di,
796 unsigned long dw,
797 struct location* loc,
798 const struct location* frame)
799 {
800 struct attribute xloc;
801
802 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE;
803
804 switch (xloc.form)
805 {
806 case DW_FORM_data1: case DW_FORM_data2:
807 case DW_FORM_udata: case DW_FORM_sdata:
808 loc->kind = loc_absolute;
809 loc->reg = 0;
810 loc->offset = xloc.u.uvalue;
811 return TRUE;
812 case DW_FORM_data4: case DW_FORM_data8:
813 loc->kind = loc_dwarf2_location_list;
814 loc->reg = Wine_DW_no_register;
815 loc->offset = xloc.u.uvalue;
816 return TRUE;
817 }
818
819 /* assume we have a block form */
820
821 if (xloc.u.block.size)
822 {
823 dwarf2_traverse_context_t lctx;
824 enum location_error err;
825
826 lctx.data = xloc.u.block.ptr;
827 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size;
828 lctx.word_size = ctx->word_size;
829
830 err = compute_location(&lctx, loc, NULL, frame);
831 if (err < 0)
832 {
833 loc->kind = loc_error;
834 loc->reg = err;
835 }
836 else if (loc->kind == loc_dwarf2_block)
837 {
838 unsigned* ptr = pool_alloc(&ctx->module->pool,
839 sizeof(unsigned) + xloc.u.block.size);
840 *ptr = xloc.u.block.size;
841 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size);
842 loc->offset = (unsigned long)ptr;
843 }
844 }
845 return TRUE;
846 }
847
848 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx,
849 const dwarf2_debug_info_t* di)
850 {
851 struct attribute attr;
852
853 if (dwarf2_find_attribute(ctx, di, DW_AT_type, &attr))
854 {
855 dwarf2_debug_info_t* type;
856
857 type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue);
858 if (!type) FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue);
859 if (!type->symt)
860 {
861 /* load the debug info entity */
862 dwarf2_load_one_entry(ctx, type, NULL);
863 }
864 return type->symt;
865 }
866 return NULL;
867 }
868
869 /******************************************************************
870 * dwarf2_read_one_debug_info
871 *
872 * Loads into memory one debug info entry, and recursively its children (if any)
873 */
874 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx,
875 dwarf2_traverse_context_t* traverse,
876 dwarf2_debug_info_t** pdi)
877 {
878 const dwarf2_abbrev_entry_t*abbrev;
879 unsigned long entry_code;
880 unsigned long offset;
881 dwarf2_debug_info_t* di;
882 dwarf2_debug_info_t* child;
883 dwarf2_debug_info_t** where;
884 dwarf2_abbrev_entry_attr_t* attr;
885 unsigned i;
886 struct attribute sibling;
887
888 offset = traverse->data - ctx->sections[ctx->section].address;
889 entry_code = dwarf2_leb128_as_unsigned(traverse);
890 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset);
891 if (!entry_code)
892 {
893 *pdi = NULL;
894 return TRUE;
895 }
896 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code);
897 if (!abbrev)
898 {
899 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset);
900 return FALSE;
901 }
902 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool);
903 if (!di) return FALSE;
904 di->abbrev = abbrev;
905 di->symt = NULL;
906
907 if (abbrev->num_attr)
908 {
909 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*));
910 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next)
911 {
912 di->data[i] = traverse->data;
913 dwarf2_swallow_attribute(traverse, attr);
914 }
915 }
916 else di->data = NULL;
917 if (abbrev->have_child)
918 {
919 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16);
920 while (traverse->data < traverse->end_data)
921 {
922 if (!dwarf2_read_one_debug_info(ctx, traverse, &child)) return FALSE;
923 if (!child) break;
924 where = vector_add(&di->children, &ctx->pool);
925 if (!where) return FALSE;
926 *where = child;
927 }
928 }
929 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) &&
930 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue)
931 {
932 WARN("setting cursor for %s to next sibling <0x%lx>\n",
933 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue);
934 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue;
935 }
936 *pdi = di;
937 return TRUE;
938 }
939
940 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx,
941 dwarf2_debug_info_t* di)
942 {
943 struct attribute name;
944 struct attribute size;
945 struct attribute encoding;
946 enum BasicType bt;
947 int cache_idx = -1;
948 if (di->symt) return di->symt;
949
950 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
951
952 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
953 name.u.string = NULL;
954 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
955 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void;
956
957 switch (encoding.u.uvalue)
958 {
959 case DW_ATE_void: bt = btVoid; break;
960 case DW_ATE_address: bt = btULong; break;
961 case DW_ATE_boolean: bt = btBool; break;
962 case DW_ATE_complex_float: bt = btComplex; break;
963 case DW_ATE_float: bt = btFloat; break;
964 case DW_ATE_signed: bt = btInt; break;
965 case DW_ATE_unsigned: bt = btUInt; break;
966 case DW_ATE_signed_char: bt = btChar; break;
967 case DW_ATE_unsigned_char: bt = btChar; break;
968 default: bt = btNoType; break;
969 }
970 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt;
971 switch (bt)
972 {
973 case btVoid:
974 assert(size.u.uvalue == 0);
975 cache_idx = sc_void;
976 break;
977 case btInt:
978 switch (size.u.uvalue)
979 {
980 case 1: cache_idx = sc_int1; break;
981 case 2: cache_idx = sc_int2; break;
982 case 4: cache_idx = sc_int4; break;
983 }
984 break;
985 default: break;
986 }
987 if (cache_idx != -1 && !ctx->symt_cache[cache_idx])
988 ctx->symt_cache[cache_idx] = di->symt;
989
990 if (di->abbrev->have_child) FIXME("Unsupported children\n");
991 return di->symt;
992 }
993
994 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx,
995 dwarf2_debug_info_t* di)
996 {
997 struct symt* ref_type;
998 struct attribute name;
999
1000 if (di->symt) return di->symt;
1001
1002 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1003
1004 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1005 ref_type = dwarf2_lookup_type(ctx, di);
1006
1007 if (name.u.string)
1008 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt;
1009 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1010 return di->symt;
1011 }
1012
1013 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx,
1014 dwarf2_debug_info_t* di)
1015 {
1016 struct symt* ref_type;
1017 struct attribute size;
1018
1019 if (di->symt) return di->symt;
1020
1021 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1022
1023 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1024 if (!(ref_type = dwarf2_lookup_type(ctx, di)))
1025 {
1026 ref_type = ctx->symt_cache[sc_void];
1027 assert(ref_type);
1028 }
1029 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1030 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1031 return di->symt;
1032 }
1033
1034 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx,
1035 dwarf2_debug_info_t* di)
1036 {
1037 struct symt* ref_type;
1038 struct symt* idx_type = NULL;
1039 struct attribute min, max, cnt;
1040 dwarf2_debug_info_t* child;
1041 unsigned int i;
1042
1043 if (di->symt) return di->symt;
1044
1045 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1046
1047 if (!di->abbrev->have_child)
1048 {
1049 FIXME("array without range information\n");
1050 return NULL;
1051 }
1052 ref_type = dwarf2_lookup_type(ctx, di);
1053
1054 for (i=0; i<vector_length(&di->children); i++)
1055 {
1056 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1057 switch (child->abbrev->tag)
1058 {
1059 case DW_TAG_subrange_type:
1060 idx_type = dwarf2_lookup_type(ctx, child);
1061 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min))
1062 min.u.uvalue = 0;
1063 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max))
1064 max.u.uvalue = 0;
1065 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt))
1066 max.u.uvalue = min.u.uvalue + cnt.u.uvalue;
1067 break;
1068 default:
1069 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1070 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1071 break;
1072 }
1073 }
1074 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt;
1075 return di->symt;
1076 }
1077
1078 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx,
1079 dwarf2_debug_info_t* di)
1080 {
1081 struct symt* ref_type;
1082
1083 if (di->symt) return di->symt;
1084
1085 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1086
1087 ref_type = dwarf2_lookup_type(ctx, di);
1088 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1089 di->symt = ref_type;
1090
1091 return ref_type;
1092 }
1093
1094 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx,
1095 dwarf2_debug_info_t* di)
1096 {
1097 struct symt* ref_type;
1098
1099 if (di->symt) return di->symt;
1100
1101 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1102
1103 ref_type = dwarf2_lookup_type(ctx, di);
1104 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1105 di->symt = ref_type;
1106
1107 return ref_type;
1108 }
1109
1110 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx,
1111 dwarf2_debug_info_t* di)
1112 {
1113 struct symt* ref_type = NULL;
1114
1115 if (di->symt) return di->symt;
1116
1117 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1118
1119 ref_type = dwarf2_lookup_type(ctx, di);
1120 /* FIXME: for now, we hard-wire C++ references to pointers */
1121 di->symt = &symt_new_pointer(ctx->module, ref_type)->symt;
1122
1123 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1124
1125 return di->symt;
1126 }
1127
1128 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx,
1129 const dwarf2_debug_info_t* di,
1130 struct symt_udt* parent)
1131 {
1132 struct symt* elt_type;
1133 struct attribute name;
1134 struct attribute bit_size;
1135 struct attribute bit_offset;
1136 struct location loc;
1137
1138 assert(parent);
1139
1140 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1141
1142 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1143 elt_type = dwarf2_lookup_type(ctx, di);
1144 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL))
1145 {
1146 if (loc.kind != loc_absolute)
1147 {
1148 FIXME("Found register, while not expecting it\n");
1149 loc.offset = 0;
1150 }
1151 else
1152 TRACE("found member_location at %s -> %lu\n",
1153 dwarf2_debug_ctx(ctx), loc.offset);
1154 }
1155 else
1156 loc.offset = 0;
1157 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size))
1158 bit_size.u.uvalue = 0;
1159 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset))
1160 {
1161 /* FIXME: we should only do this when implementation is LSB (which is
1162 * the case on i386 processors)
1163 */
1164 struct attribute nbytes;
1165 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes))
1166 {
1167 DWORD64 size;
1168 nbytes.u.uvalue = symt_get_info(elt_type, TI_GET_LENGTH, &size) ? (unsigned long)size : 0;
1169 }
1170 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue;
1171 }
1172 else bit_offset.u.uvalue = 0;
1173 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type,
1174 (loc.offset << 3) + bit_offset.u.uvalue,
1175 bit_size.u.uvalue);
1176
1177 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1178 }
1179
1180 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx,
1181 dwarf2_debug_info_t* di,
1182 enum UdtKind udt)
1183 {
1184 struct attribute name;
1185 struct attribute size;
1186
1187 if (di->symt) return di->symt;
1188
1189 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1190
1191 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL;
1192 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0;
1193
1194 di->symt = &symt_new_udt(ctx->module, name.u.string, size.u.uvalue, udt)->symt;
1195
1196 if (di->abbrev->have_child) /** any interest to not have child ? */
1197 {
1198 dwarf2_debug_info_t* child;
1199 unsigned int i;
1200
1201 for (i=0; i<vector_length(&di->children); i++)
1202 {
1203 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1204
1205 switch (child->abbrev->tag)
1206 {
1207 case DW_TAG_member:
1208 /* FIXME: should I follow the sibling stuff ?? */
1209 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt);
1210 break;
1211 case DW_TAG_enumeration_type:
1212 dwarf2_parse_enumeration_type(ctx, child);
1213 break;
1214 case DW_TAG_structure_type:
1215 case DW_TAG_class_type:
1216 case DW_TAG_union_type:
1217 case DW_TAG_typedef:
1218 /* FIXME: we need to handle nested udt definitions */
1219 break;
1220 default:
1221 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1222 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1223 break;
1224 }
1225 }
1226 }
1227
1228 return di->symt;
1229 }
1230
1231 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx,
1232 const dwarf2_debug_info_t* di,
1233 struct symt_enum* parent)
1234 {
1235 struct attribute name;
1236 struct attribute value;
1237
1238 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1239
1240 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return;
1241 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0;
1242 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue);
1243
1244 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1245 }
1246
1247 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx,
1248 dwarf2_debug_info_t* di)
1249 {
1250 struct attribute name;
1251 struct attribute size;
1252 struct symt_basic* basetype;
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_name, &name)) name.u.string = NULL;
1259 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4;
1260
1261 switch (size.u.uvalue) /* FIXME: that's wrong */
1262 {
1263 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break;
1264 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break;
1265 default:
1266 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break;
1267 }
1268
1269 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt;
1270
1271 if (di->abbrev->have_child) /* any interest to not have child ? */
1272 {
1273 dwarf2_debug_info_t* child;
1274 unsigned int i;
1275
1276 /* FIXME: should we use the sibling stuff ?? */
1277 for (i=0; i<vector_length(&di->children); i++)
1278 {
1279 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1280
1281 switch (child->abbrev->tag)
1282 {
1283 case DW_TAG_enumerator:
1284 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt);
1285 break;
1286 default:
1287 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1288 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1289 }
1290 }
1291 }
1292 return di->symt;
1293 }
1294
1295 /* structure used to pass information around when parsing a subprogram */
1296 typedef struct dwarf2_subprogram_s
1297 {
1298 dwarf2_parse_context_t* ctx;
1299 struct symt_compiland* compiland;
1300 struct symt_function* func;
1301 BOOL non_computed_variable;
1302 struct location frame;
1303 } dwarf2_subprogram_t;
1304
1305 /******************************************************************
1306 * dwarf2_parse_variable
1307 *
1308 * Parses any variable (parameter, local/global variable)
1309 */
1310 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
1311 struct symt_block* block,
1312 dwarf2_debug_info_t* di)
1313 {
1314 struct symt* param_type;
1315 struct attribute name, value;
1316 struct location loc;
1317 BOOL is_pmt;
1318
1319 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1320
1321 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter;
1322 param_type = dwarf2_lookup_type(subpgm->ctx, di);
1323
1324 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) {
1325 /* cannot do much without the name, the functions below won't like it. */
1326 return;
1327 }
1328 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location,
1329 &loc, &subpgm->frame))
1330 {
1331 struct attribute ext;
1332
1333 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n",
1334 name.u.string, loc.kind, loc.offset, loc.reg,
1335 dwarf2_debug_ctx(subpgm->ctx));
1336
1337 switch (loc.kind)
1338 {
1339 case loc_error:
1340 break;
1341 case loc_absolute:
1342 /* it's a global variable */
1343 /* FIXME: we don't handle its scope yet */
1344 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext))
1345 ext.u.uvalue = 0;
1346 symt_new_global_variable(subpgm->ctx->module, subpgm->compiland,
1347 name.u.string, !ext.u.uvalue,
1348 subpgm->ctx->load_offset + loc.offset,
1349 0, param_type);
1350 break;
1351 default:
1352 subpgm->non_computed_variable = TRUE;
1353 /* fall through */
1354 case loc_register:
1355 case loc_regrel:
1356 /* either a pmt/variable relative to frame pointer or
1357 * pmt/variable in a register
1358 */
1359 assert(subpgm->func);
1360 symt_add_func_local(subpgm->ctx->module, subpgm->func,
1361 is_pmt ? DataIsParam : DataIsLocal,
1362 &loc, block, param_type, name.u.string);
1363 break;
1364 }
1365 }
1366 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value))
1367 {
1368 VARIANT v;
1369 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string);
1370 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string);
1371 switch (value.form)
1372 {
1373 case DW_FORM_data1:
1374 case DW_FORM_data2:
1375 case DW_FORM_data4:
1376 case DW_FORM_udata:
1377 case DW_FORM_addr:
1378 v.n1.n2.vt = VT_UI4;
1379 v.n1.n2.n3.lVal = value.u.uvalue;
1380 break;
1381
1382 case DW_FORM_sdata:
1383 v.n1.n2.vt = VT_I4;
1384 v.n1.n2.n3.lVal = value.u.svalue;
1385 break;
1386
1387 case DW_FORM_strp:
1388 case DW_FORM_string:
1389 /* FIXME: native doesn't report const strings from here !!
1390 * however, the value of the string is in the code somewhere
1391 */
1392 v.n1.n2.vt = VT_I1 | VT_BYREF;
1393 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string);
1394 break;
1395
1396 case DW_FORM_data8:
1397 case DW_FORM_block:
1398 case DW_FORM_block1:
1399 case DW_FORM_block2:
1400 case DW_FORM_block4:
1401
1402 default:
1403 FIXME("Unsupported form for const value %s (%lx)\n",
1404 name.u.string, value.form);
1405 v.n1.n2.vt = VT_EMPTY;
1406 }
1407 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
1408 name.u.string, param_type, &v)->symt;
1409 }
1410 if (is_pmt && subpgm->func && subpgm->func->type)
1411 symt_add_function_signature_parameter(subpgm->ctx->module,
1412 (struct symt_function_signature*)subpgm->func->type,
1413 param_type);
1414
1415 if (di->abbrev->have_child) FIXME("Unsupported children\n");
1416 }
1417
1418 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm,
1419 const dwarf2_debug_info_t* di)
1420 {
1421 struct attribute name;
1422 struct attribute low_pc;
1423 struct location loc;
1424
1425 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1426
1427 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1428 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name))
1429 name.u.string = NULL;
1430
1431 loc.kind = loc_absolute;
1432 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue;
1433 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel,
1434 &loc, name.u.string);
1435 }
1436
1437 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1438 struct symt_block* parent_block,
1439 const dwarf2_debug_info_t* di);
1440
1441 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm,
1442 struct symt_block* parent_block,
1443 const dwarf2_debug_info_t* di)
1444 {
1445 struct symt_block* block;
1446 struct attribute low_pc;
1447 struct attribute high_pc;
1448
1449 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1450
1451 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1452 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1453
1454 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1455 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1456 high_pc.u.uvalue - low_pc.u.uvalue);
1457
1458 if (di->abbrev->have_child) /** any interest to not have child ? */
1459 {
1460 dwarf2_debug_info_t* child;
1461 unsigned int i;
1462
1463 for (i=0; i<vector_length(&di->children); i++)
1464 {
1465 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1466
1467 switch (child->abbrev->tag)
1468 {
1469 case DW_TAG_formal_parameter:
1470 case DW_TAG_variable:
1471 dwarf2_parse_variable(subpgm, block, child);
1472 break;
1473 case DW_TAG_lexical_block:
1474 dwarf2_parse_subprogram_block(subpgm, block, child);
1475 break;
1476 case DW_TAG_inlined_subroutine:
1477 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1478 break;
1479 case DW_TAG_label:
1480 dwarf2_parse_subprogram_label(subpgm, child);
1481 break;
1482 default:
1483 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1484 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx),
1485 dwarf2_debug_di(di));
1486 }
1487 }
1488 }
1489 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1490 }
1491
1492 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm,
1493 struct symt_block* parent_block,
1494 const dwarf2_debug_info_t* di)
1495 {
1496 struct symt_block* block;
1497 struct attribute low_pc;
1498 struct attribute high_pc;
1499
1500 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1501
1502 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc))
1503 low_pc.u.uvalue = 0;
1504 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_high_pc, &high_pc))
1505 high_pc.u.uvalue = 0;
1506
1507 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block,
1508 subpgm->ctx->load_offset + low_pc.u.uvalue - subpgm->func->address,
1509 high_pc.u.uvalue - low_pc.u.uvalue);
1510
1511 if (di->abbrev->have_child) /** any interest to not have child ? */
1512 {
1513 dwarf2_debug_info_t* child;
1514 unsigned int i;
1515
1516 for (i=0; i<vector_length(&di->children); i++)
1517 {
1518 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1519
1520 switch (child->abbrev->tag)
1521 {
1522 case DW_TAG_inlined_subroutine:
1523 dwarf2_parse_inlined_subroutine(subpgm, block, child);
1524 break;
1525 case DW_TAG_variable:
1526 dwarf2_parse_variable(subpgm, block, child);
1527 break;
1528 case DW_TAG_lexical_block:
1529 dwarf2_parse_subprogram_block(subpgm, block, child);
1530 break;
1531 case DW_TAG_subprogram:
1532 /* FIXME: likely a declaration (to be checked)
1533 * skip it for now
1534 */
1535 break;
1536 case DW_TAG_formal_parameter:
1537 /* FIXME: likely elements for exception handling (GCC flavor)
1538 * Skip it for now
1539 */
1540 break;
1541 case DW_TAG_label:
1542 dwarf2_parse_subprogram_label(subpgm, child);
1543 break;
1544 case DW_TAG_class_type:
1545 case DW_TAG_structure_type:
1546 case DW_TAG_union_type:
1547 case DW_TAG_enumeration_type:
1548 case DW_TAG_typedef:
1549 /* the type referred to will be loaded when we need it, so skip it */
1550 break;
1551 default:
1552 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1553 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di));
1554 }
1555 }
1556 }
1557
1558 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0);
1559 }
1560
1561 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx,
1562 dwarf2_debug_info_t* di,
1563 struct symt_compiland* compiland)
1564 {
1565 struct attribute name;
1566 struct attribute low_pc;
1567 struct attribute high_pc;
1568 struct attribute is_decl;
1569 struct attribute inline_flags;
1570 struct symt* ret_type;
1571 struct symt_function_signature* sig_type;
1572 dwarf2_subprogram_t subpgm;
1573
1574 if (di->symt) return di->symt;
1575
1576 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1577
1578 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name))
1579 {
1580 WARN("No name for function... dropping function\n");
1581 return NULL;
1582 }
1583 /* if it's an abstract representation of an inline function, there should be
1584 * a concrete object that we'll handle
1585 */
1586 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags))
1587 {
1588 TRACE("Function %s declared as inlined (%ld)... skipping\n",
1589 name.u.string ? name.u.string : "(null)", inline_flags.u.uvalue);
1590 return NULL;
1591 }
1592
1593 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0;
1594 if (!dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) high_pc.u.uvalue = 0;
1595 /* As functions (defined as inline assembly) get debug info with dwarf
1596 * (not the case for stabs), we just drop Wine's thunks here...
1597 * Actual thunks will be created in elf_module from the symbol table
1598 */
1599 if (elf_is_in_thunk_area(ctx->load_offset + low_pc.u.uvalue,
1600 ctx->thunks) >= 0)
1601 return NULL;
1602 if (!dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl))
1603 is_decl.u.uvalue = 0;
1604
1605 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1606 {
1607 ret_type = ctx->symt_cache[sc_void];
1608 assert(ret_type);
1609 }
1610
1611 /* FIXME: assuming C source code */
1612 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1613 if (!is_decl.u.uvalue)
1614 {
1615 subpgm.func = symt_new_function(ctx->module, compiland, name.u.string,
1616 ctx->load_offset + low_pc.u.uvalue,
1617 high_pc.u.uvalue - low_pc.u.uvalue,
1618 &sig_type->symt);
1619 di->symt = &subpgm.func->symt;
1620 }
1621 else subpgm.func = NULL;
1622
1623 subpgm.ctx = ctx;
1624 subpgm.compiland = compiland;
1625 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base,
1626 &subpgm.frame, NULL))
1627 {
1628 /* on stack !! */
1629 subpgm.frame.kind = loc_regrel;
1630 subpgm.frame.reg = 0;
1631 subpgm.frame.offset = 0;
1632 }
1633 subpgm.non_computed_variable = FALSE;
1634
1635 if (di->abbrev->have_child) /** any interest to not have child ? */
1636 {
1637 dwarf2_debug_info_t* child;
1638 unsigned int i;
1639
1640 for (i=0; i<vector_length(&di->children); i++)
1641 {
1642 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1643
1644 switch (child->abbrev->tag)
1645 {
1646 case DW_TAG_variable:
1647 case DW_TAG_formal_parameter:
1648 dwarf2_parse_variable(&subpgm, NULL, child);
1649 break;
1650 case DW_TAG_lexical_block:
1651 dwarf2_parse_subprogram_block(&subpgm, NULL, child);
1652 break;
1653 case DW_TAG_inlined_subroutine:
1654 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child);
1655 break;
1656 case DW_TAG_subprogram:
1657 /* FIXME: likely a declaration (to be checked)
1658 * skip it for now
1659 */
1660 break;
1661 case DW_TAG_label:
1662 dwarf2_parse_subprogram_label(&subpgm, child);
1663 break;
1664 case DW_TAG_class_type:
1665 case DW_TAG_structure_type:
1666 case DW_TAG_union_type:
1667 case DW_TAG_enumeration_type:
1668 case DW_TAG_typedef:
1669 /* the type referred to will be loaded when we need it, so skip it */
1670 break;
1671 case DW_TAG_unspecified_parameters:
1672 /* FIXME: no support in dbghelp's internals so far */
1673 break;
1674 default:
1675 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n",
1676 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1677 }
1678 }
1679 }
1680
1681 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user)
1682 {
1683 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom,
1684 &subpgm.frame, NULL);
1685 }
1686 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func);
1687
1688 return di->symt;
1689 }
1690
1691 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx,
1692 dwarf2_debug_info_t* di)
1693 {
1694 struct symt* ret_type;
1695 struct symt_function_signature* sig_type;
1696
1697 if (di->symt) return di->symt;
1698
1699 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di));
1700
1701 if (!(ret_type = dwarf2_lookup_type(ctx, di)))
1702 {
1703 ret_type = ctx->symt_cache[sc_void];
1704 assert(ret_type);
1705 }
1706
1707 /* FIXME: assuming C source code */
1708 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C);
1709
1710 if (di->abbrev->have_child) /** any interest to not have child ? */
1711 {
1712 dwarf2_debug_info_t* child;
1713 unsigned int i;
1714
1715 for (i=0; i<vector_length(&di->children); i++)
1716 {
1717 child = *(dwarf2_debug_info_t**)vector_at(&di->children, i);
1718
1719 switch (child->abbrev->tag)
1720 {
1721 case DW_TAG_formal_parameter:
1722 symt_add_function_signature_parameter(ctx->module, sig_type,
1723 dwarf2_lookup_type(ctx, child));
1724 break;
1725 case DW_TAG_unspecified_parameters:
1726 WARN("Unsupported unspecified parameters\n");
1727 break;
1728 }
1729 }
1730 }
1731
1732 return di->symt = &sig_type->symt;
1733 }
1734
1735 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx,
1736 dwarf2_debug_info_t* di,
1737 struct symt_compiland* compiland)
1738 {
1739 switch (di->abbrev->tag)
1740 {
1741 case DW_TAG_typedef:
1742 dwarf2_parse_typedef(ctx, di);
1743 break;
1744 case DW_TAG_base_type:
1745 dwarf2_parse_base_type(ctx, di);
1746 break;
1747 case DW_TAG_pointer_type:
1748 dwarf2_parse_pointer_type(ctx, di);
1749 break;
1750 case DW_TAG_class_type:
1751 dwarf2_parse_udt_type(ctx, di, UdtClass);
1752 break;
1753 case DW_TAG_structure_type:
1754 dwarf2_parse_udt_type(ctx, di, UdtStruct);
1755 break;
1756 case DW_TAG_union_type:
1757 dwarf2_parse_udt_type(ctx, di, UdtUnion);
1758 break;
1759 case DW_TAG_array_type:
1760 dwarf2_parse_array_type(ctx, di);
1761 break;
1762 case DW_TAG_const_type:
1763 dwarf2_parse_const_type(ctx, di);
1764 break;
1765 case DW_TAG_volatile_type:
1766 dwarf2_parse_volatile_type(ctx, di);
1767 break;
1768 case DW_TAG_reference_type:
1769 dwarf2_parse_reference_type(ctx, di);
1770 break;
1771 case DW_TAG_enumeration_type:
1772 dwarf2_parse_enumeration_type(ctx, di);
1773 break;
1774 case DW_TAG_subprogram:
1775 dwarf2_parse_subprogram(ctx, di, compiland);
1776 break;
1777 case DW_TAG_subroutine_type:
1778 dwarf2_parse_subroutine_type(ctx, di);
1779 break;
1780 case DW_TAG_variable:
1781 {
1782 dwarf2_subprogram_t subpgm;
1783
1784 subpgm.ctx = ctx;
1785 subpgm.compiland = compiland;
1786 subpgm.func = NULL;
1787 subpgm.frame.kind = loc_absolute;
1788 subpgm.frame.offset = 0;
1789 subpgm.frame.reg = Wine_DW_no_register;
1790 dwarf2_parse_variable(&subpgm, NULL, di);
1791 }
1792 break;
1793 default:
1794 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n",
1795 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code);
1796 }
1797 }
1798
1799 static void dwarf2_set_line_number(struct module* module, unsigned long address,
1800 const struct vector* v, unsigned file, unsigned line)
1801 {
1802 struct symt_function* func;
1803 struct symt_ht* symt;
1804 unsigned* psrc;
1805
1806 if (!file || !(psrc = vector_at(v, file - 1))) return;
1807
1808 TRACE("%s %lx %s %u\n",
1809 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line);
1810 if (!(symt = symt_find_nearest(module, address)) ||
1811 symt->symt.tag != SymTagFunction) return;
1812 func = (struct symt_function*)symt;
1813 symt_add_func_line(module, func, *psrc, line, address - func->address);
1814 }
1815
1816 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
1817 dwarf2_parse_context_t* ctx,
1818 const char* compile_dir,
1819 unsigned long offset)
1820 {
1821 dwarf2_traverse_context_t traverse;
1822 unsigned long length;
1823 unsigned version, header_len, insn_size, default_stmt;
1824 unsigned line_range, opcode_base;
1825 int line_base;
1826 const unsigned char* opcode_len;
1827 struct vector dirs;
1828 struct vector files;
1829 const char** p;
1830
1831 /* section with line numbers stripped */
1832 if (sections[section_line].address == ELF_NO_MAP)
1833 return FALSE;
1834
1835 traverse.data = sections[section_line].address + offset;
1836 traverse.start_data = traverse.data;
1837 traverse.end_data = traverse.data + 4;
1838 traverse.word_size = ctx->word_size;
1839
1840 length = dwarf2_parse_u4(&traverse);
1841 traverse.end_data = traverse.start_data + length;
1842
1843 version = dwarf2_parse_u2(&traverse);
1844 header_len = dwarf2_parse_u4(&traverse);
1845 insn_size = dwarf2_parse_byte(&traverse);
1846 default_stmt = dwarf2_parse_byte(&traverse);
1847 line_base = (signed char)dwarf2_parse_byte(&traverse);
1848 line_range = dwarf2_parse_byte(&traverse);
1849 opcode_base = dwarf2_parse_byte(&traverse);
1850
1851 opcode_len = traverse.data;
1852 traverse.data += opcode_base - 1;
1853
1854 vector_init(&dirs, sizeof(const char*), 4);
1855 p = vector_add(&dirs, &ctx->pool);
1856 *p = compile_dir ? compile_dir : ".";
1857 while (*traverse.data)
1858 {
1859 const char* rel = (const char*)traverse.data;
1860 unsigned rellen = strlen(rel);
1861 TRACE("Got include %s\n", rel);
1862 traverse.data += rellen + 1;
1863 p = vector_add(&dirs, &ctx->pool);
1864
1865 if (*rel == '/' || !compile_dir)
1866 *p = rel;
1867 else
1868 {
1869 /* include directory relative to compile directory */
1870 unsigned baselen = strlen(compile_dir);
1871 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1);
1872 strcpy(tmp, compile_dir);
1873 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/';
1874 strcpy(&tmp[baselen], rel);
1875 *p = tmp;
1876 }
1877
1878 }
1879 traverse.data++;
1880
1881 vector_init(&files, sizeof(unsigned), 16);
1882 while (*traverse.data)
1883 {
1884 unsigned int dir_index, mod_time, length;
1885 const char* name;
1886 const char* dir;
1887 unsigned* psrc;
1888
1889 name = (const char*)traverse.data;
1890 traverse.data += strlen(name) + 1;
1891 dir_index = dwarf2_leb128_as_unsigned(&traverse);
1892 mod_time = dwarf2_leb128_as_unsigned(&traverse);
1893 length = dwarf2_leb128_as_unsigned(&traverse);
1894 dir = *(const char**)vector_at(&dirs, dir_index);
1895 TRACE("Got file %s/%s (%u,%u)\n", dir, name, mod_time, length);
1896 psrc = vector_add(&files, &ctx->pool);
1897 *psrc = source_new(ctx->module, dir, name);
1898 }
1899 traverse.data++;
1900
1901 while (traverse.data < traverse.end_data)
1902 {
1903 unsigned long address = 0;
1904 unsigned file = 1;
1905 unsigned line = 1;
1906 unsigned is_stmt = default_stmt;
1907 BOOL basic_block = FALSE, end_sequence = FALSE;
1908 unsigned opcode, extopcode, i;
1909
1910 while (!end_sequence)
1911 {
1912 opcode = dwarf2_parse_byte(&traverse);
1913 TRACE("Got opcode %x\n", opcode);
1914
1915 if (opcode >= opcode_base)
1916 {
1917 unsigned delta = opcode - opcode_base;
1918
1919 address += (delta / line_range) * insn_size;
1920 line += line_base + (delta % line_range);
1921 basic_block = TRUE;
1922 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1923 }
1924 else
1925 {
1926 switch (opcode)
1927 {
1928 case DW_LNS_copy:
1929 basic_block = FALSE;
1930 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1931 break;
1932 case DW_LNS_advance_pc:
1933 address += insn_size * dwarf2_leb128_as_unsigned(&traverse);
1934 break;
1935 case DW_LNS_advance_line:
1936 line += dwarf2_leb128_as_signed(&traverse);
1937 break;
1938 case DW_LNS_set_file:
1939 file = dwarf2_leb128_as_unsigned(&traverse);
1940 break;
1941 case DW_LNS_set_column:
1942 dwarf2_leb128_as_unsigned(&traverse);
1943 break;
1944 case DW_LNS_negate_stmt:
1945 is_stmt = !is_stmt;
1946 break;
1947 case DW_LNS_set_basic_block:
1948 basic_block = 1;
1949 break;
1950 case DW_LNS_const_add_pc:
1951 address += ((255 - opcode_base) / line_range) * insn_size;
1952 break;
1953 case DW_LNS_fixed_advance_pc:
1954 address += dwarf2_parse_u2(&traverse);
1955 break;
1956 case DW_LNS_extended_op:
1957 dwarf2_leb128_as_unsigned(&traverse);
1958 extopcode = dwarf2_parse_byte(&traverse);
1959 switch (extopcode)
1960 {
1961 case DW_LNE_end_sequence:
1962 dwarf2_set_line_number(ctx->module, address, &files, file, line);
1963 end_sequence = TRUE;
1964 break;
1965 case DW_LNE_set_address:
1966 address = ctx->load_offset + dwarf2_parse_addr(&traverse);
1967 break;
1968 case DW_LNE_define_file:
1969 FIXME("not handled %s\n", traverse.data);
1970 traverse.data += strlen((const char *)traverse.data) + 1;
1971 dwarf2_leb128_as_unsigned(&traverse);
1972 dwarf2_leb128_as_unsigned(&traverse);
1973 dwarf2_leb128_as_unsigned(&traverse);
1974 break;
1975 default:
1976 FIXME("Unsupported extended opcode %x\n", extopcode);
1977 break;
1978 }
1979 break;
1980 default:
1981 WARN("Unsupported opcode %x\n", opcode);
1982 for (i = 0; i < opcode_len[opcode]; i++)
1983 dwarf2_leb128_as_unsigned(&traverse);
1984 break;
1985 }
1986 }
1987 }
1988 }
1989 return TRUE;
1990 }
1991
1992 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections,
1993 struct module* module,
1994 const struct elf_thunk_area* thunks,
1995 dwarf2_traverse_context_t* mod_ctx,
1996 unsigned long load_offset)
1997 {
1998 dwarf2_parse_context_t ctx;
1999 dwarf2_traverse_context_t abbrev_ctx;
2000 dwarf2_debug_info_t* di;
2001 dwarf2_traverse_context_t cu_ctx;
2002 const unsigned char* comp_unit_start = mod_ctx->data;
2003 unsigned long cu_length;
2004 unsigned short cu_version;
2005 unsigned long cu_abbrev_offset;
2006 BOOL ret = FALSE;
2007
2008 cu_length = dwarf2_parse_u4(mod_ctx);
2009 cu_ctx.data = cu_ctx.start_data = mod_ctx->data;
2010 cu_ctx.end_data = mod_ctx->data + cu_length;
2011 mod_ctx->data += cu_length;
2012 cu_version = dwarf2_parse_u2(&cu_ctx);
2013 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx);
2014 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx);
2015
2016 TRACE("Compilation Unit Header found at 0x%x:\n",
2017 comp_unit_start - sections[section_debug].address);
2018 TRACE("- length: %lu\n", cu_length);
2019 TRACE("- version: %u\n", cu_version);
2020 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset);
2021 TRACE("- word_size: %u\n", cu_ctx.word_size);
2022
2023 if (cu_version != 2)
2024 {
2025 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n",
2026 cu_version);
2027 return FALSE;
2028 }
2029
2030 pool_init(&ctx.pool, 65536);
2031 ctx.sections = sections;
2032 ctx.section = section_debug;
2033 ctx.module = module;
2034 ctx.word_size = cu_ctx.word_size;
2035 ctx.thunks = thunks;
2036 ctx.load_offset = load_offset;
2037 ctx.ref_offset = comp_unit_start - sections[section_debug].address;
2038 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache));
2039 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt;
2040
2041 abbrev_ctx.start_data = sections[section_abbrev].address + cu_abbrev_offset;
2042 abbrev_ctx.data = abbrev_ctx.start_data;
2043 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size;
2044 abbrev_ctx.word_size = cu_ctx.word_size;
2045 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool);
2046
2047 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128);
2048 dwarf2_read_one_debug_info(&ctx, &cu_ctx, &di);
2049
2050 if (di->abbrev->tag == DW_TAG_compile_unit)
2051 {
2052 struct attribute name;
2053 dwarf2_debug_info_t** pdi = NULL;
2054 struct attribute stmt_list, low_pc;
2055 struct attribute comp_dir;
2056
2057 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name))
2058 name.u.string = NULL;
2059
2060 /* get working directory of current compilation unit */
2061 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir))
2062 comp_dir.u.string = NULL;
2063
2064 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc))
2065 low_pc.u.uvalue = 0;
2066 di->symt = &symt_new_compiland(module,
2067 ctx.load_offset + low_pc.u.uvalue,
2068 source_new(module, comp_dir.u.string, name.u.string))->symt;
2069
2070 if (di->abbrev->have_child)
2071 {
2072 unsigned int i;
2073 for (i=0; i<vector_length(&di->children); i++)
2074 {
2075 pdi = vector_at(&di->children, i);
2076 dwarf2_load_one_entry(&ctx, *pdi, (struct symt_compiland*)di->symt);
2077 }
2078 }
2079 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list))
2080 {
2081 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue))
2082 module->module.LineNumbers = TRUE;
2083 }
2084 ret = TRUE;
2085 }
2086 else FIXME("Should have a compilation unit here\n");
2087 pool_destroy(&ctx.pool);
2088 return ret;
2089 }
2090
2091 static BOOL dwarf2_lookup_loclist(const struct module* module, const BYTE* start,
2092 unsigned long ip,
2093 dwarf2_traverse_context_t* lctx)
2094 {
2095 DWORD beg, end;
2096 const BYTE* ptr = start;
2097 DWORD len;
2098
2099 while (ptr < module->dwarf2_info->debug_loc.address + module->dwarf2_info->debug_loc.size)
2100 {
2101 beg = dwarf2_get_u4(ptr); ptr += 4;
2102 end = dwarf2_get_u4(ptr); ptr += 4;
2103 if (!beg && !end) break;
2104 len = dwarf2_get_u2(ptr); ptr += 2;
2105
2106 if (beg <= ip && ip < end)
2107 {
2108 lctx->data = ptr;
2109 lctx->end_data = ptr + len;
2110 lctx->word_size = 4; /* FIXME word size !!! */
2111 return TRUE;
2112 }
2113 ptr += len;
2114 }
2115 WARN("Couldn't find ip in location list\n");
2116 return FALSE;
2117 }
2118
2119 static enum location_error loc_compute_frame(struct process* pcs,
2120 const struct module* module,
2121 const struct symt_function* func,
2122 DWORD ip, struct location* frame)
2123 {
2124 struct symt** psym = NULL;
2125 struct location* pframe;
2126 dwarf2_traverse_context_t lctx;
2127 enum location_error err;
2128 unsigned int i;
2129
2130 for (i=0; i<vector_length(&func->vchildren); i++)
2131 {
2132 psym = vector_at(&func->vchildren, i);
2133 if ((*psym)->tag == SymTagCustom)
2134 {
2135 pframe = &((struct symt_hierarchy_point*)*psym)->loc;
2136
2137 /* First, recompute the frame information, if needed */
2138 switch (pframe->kind)
2139 {
2140 case loc_regrel:
2141 case loc_register:
2142 *frame = *pframe;
2143 break;
2144 case loc_dwarf2_location_list:
2145 WARN("Searching loclist for %s\n", func->hash_elt.name);
2146 if (!dwarf2_lookup_loclist(module,
2147 module->dwarf2_info->debug_loc.address + pframe->offset,
2148 ip, &lctx))
2149 return loc_err_out_of_scope;
2150 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err;
2151 if (frame->kind >= loc_user)
2152 {
2153 WARN("Couldn't compute runtime frame location\n");
2154 return loc_err_too_complex;
2155 }
2156 break;
2157 default:
2158 WARN("Unsupported frame kind %d\n", pframe->kind);
2159 return loc_err_internal;
2160 }
2161 return 0;
2162 }
2163 }
2164 WARN("Couldn't find Custom function point, whilst location list offset is searched\n");
2165 return loc_err_internal;
2166 }
2167
2168 static void dwarf2_location_compute(struct process* pcs,
2169 const struct module* module,
2170 const struct symt_function* func,
2171 struct location* loc)
2172 {
2173 struct location frame;
2174 DWORD ip;
2175 int err;
2176 dwarf2_traverse_context_t lctx;
2177
2178 if (!func->container || func->container->tag != SymTagCompiland)
2179 {
2180 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name);
2181 err = loc_err_internal;
2182 }
2183 else
2184 {
2185 /* instruction pointer relative to compiland's start */
2186 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address;
2187
2188 if ((err = loc_compute_frame(pcs, module, func, ip, &frame)) == 0)
2189 {
2190 switch (loc->kind)
2191 {
2192 case loc_dwarf2_location_list:
2193 /* Then, if the variable has a location list, find it !! */
2194 if (dwarf2_lookup_loclist(module,
2195 module->dwarf2_info->debug_loc.address + loc->offset,
2196 ip, &lctx))
2197 goto do_compute;
2198 err = loc_err_out_of_scope;
2199 break;
2200 case loc_dwarf2_block:
2201 /* or if we have a copy of an existing block, get ready for it */
2202 {
2203 unsigned* ptr = (unsigned*)loc->offset;
2204
2205 lctx.data = (const BYTE*)(ptr + 1);
2206 lctx.end_data = lctx.data + *ptr;
2207 lctx.word_size = 4; /* FIXME !! */
2208 }
2209 do_compute:
2210 /* now get the variable */
2211 err = compute_location(&lctx, loc, pcs->handle, &frame);
2212 break;
2213 case loc_register:
2214 case loc_regrel:
2215 /* nothing to do */
2216 break;
2217 default:
2218 WARN("Unsupported local kind %d\n", loc->kind);
2219 err = loc_err_internal;
2220 }
2221 }
2222 }
2223 if (err < 0)
2224 {
2225 loc->kind = loc_register;
2226 loc->reg = err;
2227 }
2228 }
2229
2230 BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
2231 const struct elf_thunk_area* thunks,
2232 const unsigned char* debug, unsigned int debug_size,
2233 const unsigned char* abbrev, unsigned int abbrev_size,
2234 const unsigned char* str, unsigned int str_size,
2235 const unsigned char* line, unsigned int line_size,
2236 const unsigned char* loclist, unsigned int loclist_size)
2237 {
2238 dwarf2_section_t section[section_max];
2239 unsigned char* ptr;
2240 dwarf2_traverse_context_t mod_ctx;
2241
2242 mod_ctx.start_data = mod_ctx.data = debug;
2243 mod_ctx.end_data = debug + debug_size;
2244
2245 module->loc_compute = dwarf2_location_compute;
2246
2247 section[section_debug].address = debug;
2248 section[section_debug].size = debug_size;
2249 section[section_abbrev].address = abbrev;
2250 section[section_abbrev].size = abbrev_size;
2251 section[section_string].address = str;
2252 section[section_string].size = str_size;
2253 section[section_line].address = line;
2254 section[section_line].size = line_size;
2255
2256 if (loclist_size)
2257 {
2258 /* initialize the dwarf2 specific info block for this module.
2259 * As we'll need later on the .debug_loc section content, we copy it in
2260 * the module structure for later reuse
2261 */
2262 module->dwarf2_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*module->dwarf2_info) + loclist_size);
2263 if (!module->dwarf2_info) return FALSE;
2264 ptr = (unsigned char*)(module->dwarf2_info + 1);
2265 memcpy(ptr, loclist, loclist_size);
2266 module->dwarf2_info->debug_loc.address = ptr;
2267 module->dwarf2_info->debug_loc.size = loclist_size;
2268 }
2269
2270 while (mod_ctx.data < mod_ctx.end_data)
2271 {
2272 dwarf2_parse_compilation_unit(section, module, thunks, &mod_ctx, load_offset);
2273 }
2274 module->module.SymType = SymDia;
2275 module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24);
2276 /* FIXME: we could have a finer grain here */
2277 module->module.GlobalSymbols = TRUE;
2278 module->module.TypeInfo = TRUE;
2279 module->module.SourceIndexed = TRUE;
2280 module->module.Publics = TRUE;
2281 return TRUE;
2282 }
DirectPlay implementation for GSoC