1 /* 2 * File dwarf.c - read dwarf2 information from the ELF modules 3 * 4 * Copyright (C) 2005, Raphael Junqueira 5 * Copyright (C) 2006-2011, Eric Pouech 6 * Copyright (C) 2010, Alexandre Julliard 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with this library; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 21 */ 22 23 #ifndef DBGHELP_STATIC_LIB 24 25 #define NONAMELESSUNION 26 27 #include "config.h" 28 29 #include <sys/types.h> 30 #include <fcntl.h> 31 #ifdef HAVE_SYS_STAT_H 32 # include <sys/stat.h> 33 #endif 34 #ifdef HAVE_SYS_MMAN_H 35 #include <sys/mman.h> 36 #endif 37 #include <limits.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #ifdef HAVE_UNISTD_H 41 # include <unistd.h> 42 #endif 43 #include <stdio.h> 44 #include <assert.h> 45 #include <stdarg.h> 46 47 #ifdef HAVE_ZLIB 48 #include <zlib.h> 49 #endif 50 51 #include "windef.h" 52 #include "winternl.h" 53 #include "winbase.h" 54 #include "winuser.h" 55 #include "ole2.h" 56 #include "oleauto.h" 57 58 #include "dbghelp_private.h" 59 #include "image_private.h" 60 61 #include "wine/debug.h" 62 63 #else 64 #include "dbghelp_private.h" 65 #include "image_private.h" 66 #endif /* !DBGHELP_STATIC_LIB */ 67 68 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf); 69 70 /* FIXME: 71 * - Functions: 72 * o unspecified parameters 73 * o inlined functions 74 * o Debug{Start|End}Point 75 * o CFA 76 * - Udt 77 * o proper types loading (nesting) 78 */ 79 80 #if 0 81 static void dump(const void* ptr, unsigned len) 82 { 83 int i, j; 84 BYTE msg[128]; 85 static const char hexof[] = "0123456789abcdef"; 86 const BYTE* x = ptr; 87 88 for (i = 0; i < len; i += 16) 89 { 90 sprintf(msg, "%08x: ", i); 91 memset(msg + 10, ' ', 3 * 16 + 1 + 16); 92 for (j = 0; j < min(16, len - i); j++) 93 { 94 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4]; 95 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15]; 96 msg[10 + 3 * j + 2] = ' '; 97 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ? 98 x[i + j] : '.'; 99 } 100 msg[10 + 3 * 16] = ' '; 101 msg[10 + 3 * 16 + 1 + 16] = '\0'; 102 TRACE("%s\n", msg); 103 } 104 } 105 #endif 106 107 /** 108 * 109 * Main Specs: 110 * http://www.eagercon.com/dwarf/dwarf3std.htm 111 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf 112 * 113 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html 114 * 115 * example of projects who do dwarf2 parsing: 116 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2 117 * http://elis.ugent.be/diota/log/ltrace_elf.c 118 */ 119 #include "dwarf.h" 120 121 /** 122 * Parsers 123 */ 124 125 typedef struct dwarf2_abbrev_entry_attr_s 126 { 127 unsigned long attribute; 128 unsigned long form; 129 struct dwarf2_abbrev_entry_attr_s* next; 130 } dwarf2_abbrev_entry_attr_t; 131 132 typedef struct dwarf2_abbrev_entry_s 133 { 134 unsigned long entry_code; 135 unsigned long tag; 136 unsigned char have_child; 137 unsigned num_attr; 138 dwarf2_abbrev_entry_attr_t* attrs; 139 } dwarf2_abbrev_entry_t; 140 141 struct dwarf2_block 142 { 143 unsigned size; 144 const unsigned char* ptr; 145 }; 146 147 struct attribute 148 { 149 unsigned long form; 150 enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from; 151 union 152 { 153 unsigned long uvalue; 154 ULONGLONG lluvalue; 155 long svalue; 156 const char* string; 157 struct dwarf2_block block; 158 } u; 159 }; 160 161 typedef struct dwarf2_debug_info_s 162 { 163 const dwarf2_abbrev_entry_t*abbrev; 164 struct symt* symt; 165 const unsigned char** data; 166 struct vector children; 167 struct dwarf2_debug_info_s* parent; 168 } dwarf2_debug_info_t; 169 170 typedef struct dwarf2_section_s 171 { 172 BOOL compressed; 173 const unsigned char* address; 174 unsigned size; 175 DWORD_PTR rva; 176 } dwarf2_section_t; 177 178 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max}; 179 180 typedef struct dwarf2_traverse_context_s 181 { 182 const unsigned char* data; 183 const unsigned char* end_data; 184 unsigned char word_size; 185 } dwarf2_traverse_context_t; 186 187 /* symt_cache indexes */ 188 #define sc_void 0 189 #define sc_int1 1 190 #define sc_int2 2 191 #define sc_int4 3 192 #define sc_num 4 193 194 typedef struct dwarf2_parse_context_s 195 { 196 const dwarf2_section_t* sections; 197 unsigned section; 198 struct pool pool; 199 struct module* module; 200 struct symt_compiland* compiland; 201 const struct elf_thunk_area*thunks; 202 struct sparse_array abbrev_table; 203 struct sparse_array debug_info_table; 204 unsigned long load_offset; 205 unsigned long ref_offset; 206 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */ 207 char* cpp_name; 208 } dwarf2_parse_context_t; 209 210 /* stored in the dbghelp's module internal structure for later reuse */ 211 struct dwarf2_module_info_s 212 { 213 dwarf2_section_t debug_loc; 214 dwarf2_section_t debug_frame; 215 dwarf2_section_t eh_frame; 216 unsigned char word_size; 217 }; 218 219 #define loc_dwarf2_location_list (loc_user + 0) 220 #define loc_dwarf2_block (loc_user + 1) 221 222 /* forward declarations */ 223 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry); 224 225 static unsigned char dwarf2_get_byte(const unsigned char* ptr) 226 { 227 return *ptr; 228 } 229 230 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx) 231 { 232 unsigned char uvalue = dwarf2_get_byte(ctx->data); 233 ctx->data += 1; 234 return uvalue; 235 } 236 237 static unsigned short dwarf2_get_u2(const unsigned char* ptr) 238 { 239 return *(const UINT16*)ptr; 240 } 241 242 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx) 243 { 244 unsigned short uvalue = dwarf2_get_u2(ctx->data); 245 ctx->data += 2; 246 return uvalue; 247 } 248 249 static unsigned long dwarf2_get_u4(const unsigned char* ptr) 250 { 251 return *(const UINT32*)ptr; 252 } 253 254 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx) 255 { 256 unsigned long uvalue = dwarf2_get_u4(ctx->data); 257 ctx->data += 4; 258 return uvalue; 259 } 260 261 static DWORD64 dwarf2_get_u8(const unsigned char* ptr) 262 { 263 return *(const UINT64*)ptr; 264 } 265 266 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx) 267 { 268 DWORD64 uvalue = dwarf2_get_u8(ctx->data); 269 ctx->data += 8; 270 return uvalue; 271 } 272 273 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end) 274 { 275 unsigned long ret = 0; 276 unsigned char byte; 277 unsigned shift = 0; 278 279 do 280 { 281 byte = dwarf2_get_byte(ptr++); 282 ret |= (byte & 0x7f) << shift; 283 shift += 7; 284 } while (byte & 0x80); 285 286 if (end) *end = ptr; 287 return ret; 288 } 289 290 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx) 291 { 292 unsigned long ret; 293 294 assert(ctx); 295 296 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data); 297 298 return ret; 299 } 300 301 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end) 302 { 303 long ret = 0; 304 unsigned char byte; 305 unsigned shift = 0; 306 const unsigned size = sizeof(int) * 8; 307 308 do 309 { 310 byte = dwarf2_get_byte(ptr++); 311 ret |= (byte & 0x7f) << shift; 312 shift += 7; 313 } while (byte & 0x80); 314 if (end) *end = ptr; 315 316 /* as spec: sign bit of byte is 2nd high order bit (80x40) 317 * -> 0x80 is used as flag. 318 */ 319 if ((shift < size) && (byte & 0x40)) 320 { 321 ret |= - (1 << shift); 322 } 323 return ret; 324 } 325 326 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx) 327 { 328 long ret = 0; 329 330 assert(ctx); 331 332 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data); 333 return ret; 334 } 335 336 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx) 337 { 338 unsigned ret; 339 for (ret = 0; ctx->data[ret] & 0x80; ret++); 340 return ret + 1; 341 } 342 343 /****************************************************************** 344 * dwarf2_get_addr 345 * 346 * Returns an address. 347 * We assume that in all cases word size from Dwarf matches the size of 348 * addresses in platform where the exec is compiled. 349 */ 350 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size) 351 { 352 unsigned long ret; 353 354 switch (word_size) 355 { 356 case 4: 357 ret = dwarf2_get_u4(ptr); 358 break; 359 case 8: 360 ret = dwarf2_get_u8(ptr); 361 break; 362 default: 363 FIXME("Unsupported Word Size %u\n", word_size); 364 ret = 0; 365 } 366 return ret; 367 } 368 369 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx) 370 { 371 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size); 372 ctx->data += ctx->word_size; 373 return ret; 374 } 375 376 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx) 377 { 378 return wine_dbg_sprintf("ctx(%p)", ctx->data); 379 } 380 381 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx) 382 { 383 return wine_dbg_sprintf("ctx(%p,%s)", 384 ctx, debugstr_w(ctx->module->module.ModuleName)); 385 } 386 387 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di) 388 { 389 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)", 390 di->abbrev, di->symt); 391 } 392 393 static dwarf2_abbrev_entry_t* 394 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table, 395 unsigned long entry_code) 396 { 397 assert( NULL != abbrev_table ); 398 return sparse_array_find(abbrev_table, entry_code); 399 } 400 401 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx, 402 struct sparse_array* abbrev_table, 403 struct pool* pool) 404 { 405 unsigned long entry_code; 406 dwarf2_abbrev_entry_t* abbrev_entry; 407 dwarf2_abbrev_entry_attr_t* new = NULL; 408 dwarf2_abbrev_entry_attr_t* last = NULL; 409 unsigned long attribute; 410 unsigned long form; 411 412 assert( NULL != abbrev_ctx ); 413 414 TRACE("%s, end at %p\n", 415 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data); 416 417 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32); 418 while (abbrev_ctx->data < abbrev_ctx->end_data) 419 { 420 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx)); 421 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx); 422 TRACE("found entry_code %lu\n", entry_code); 423 if (!entry_code) 424 { 425 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx)); 426 break; 427 } 428 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool); 429 assert( NULL != abbrev_entry ); 430 431 abbrev_entry->entry_code = entry_code; 432 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx); 433 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx); 434 abbrev_entry->attrs = NULL; 435 abbrev_entry->num_attr = 0; 436 437 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n", 438 abbrev_table, sparse_array_length(abbrev_table), 439 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry); 440 441 last = NULL; 442 while (1) 443 { 444 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx); 445 form = dwarf2_leb128_as_unsigned(abbrev_ctx); 446 if (!attribute) break; 447 448 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t)); 449 assert(new); 450 451 new->attribute = attribute; 452 new->form = form; 453 new->next = NULL; 454 if (abbrev_entry->attrs) last->next = new; 455 else abbrev_entry->attrs = new; 456 last = new; 457 abbrev_entry->num_attr++; 458 } 459 } 460 TRACE("found %u entries\n", sparse_array_length(abbrev_table)); 461 } 462 463 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx, 464 const dwarf2_abbrev_entry_attr_t* abbrev_attr) 465 { 466 unsigned step; 467 468 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form); 469 470 switch (abbrev_attr->form) 471 { 472 case DW_FORM_flag_present: step = 0; break; 473 case DW_FORM_ref_addr: 474 case DW_FORM_addr: step = ctx->word_size; break; 475 case DW_FORM_flag: 476 case DW_FORM_data1: 477 case DW_FORM_ref1: step = 1; break; 478 case DW_FORM_data2: 479 case DW_FORM_ref2: step = 2; break; 480 case DW_FORM_data4: 481 case DW_FORM_ref4: 482 case DW_FORM_strp: step = 4; break; 483 case DW_FORM_data8: 484 case DW_FORM_ref8: step = 8; break; 485 case DW_FORM_sdata: 486 case DW_FORM_ref_udata: 487 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break; 488 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break; 489 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break; 490 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break; 491 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break; 492 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break; 493 default: 494 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); 495 return; 496 } 497 ctx->data += step; 498 } 499 500 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx, 501 const dwarf2_abbrev_entry_attr_t* abbrev_attr, 502 const unsigned char* data, 503 struct attribute* attr) 504 { 505 attr->form = abbrev_attr->form; 506 switch (attr->form) 507 { 508 case DW_FORM_ref_addr: 509 case DW_FORM_addr: 510 attr->u.uvalue = dwarf2_get_addr(data, 511 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size); 512 TRACE("addr<0x%lx>\n", attr->u.uvalue); 513 break; 514 515 case DW_FORM_flag: 516 attr->u.uvalue = dwarf2_get_byte(data); 517 TRACE("flag<0x%lx>\n", attr->u.uvalue); 518 break; 519 520 case DW_FORM_flag_present: 521 attr->u.uvalue = 1; 522 TRACE("flag_present\n"); 523 break; 524 525 case DW_FORM_data1: 526 attr->u.uvalue = dwarf2_get_byte(data); 527 TRACE("data1<%lu>\n", attr->u.uvalue); 528 break; 529 530 case DW_FORM_data2: 531 attr->u.uvalue = dwarf2_get_u2(data); 532 TRACE("data2<%lu>\n", attr->u.uvalue); 533 break; 534 535 case DW_FORM_data4: 536 attr->u.uvalue = dwarf2_get_u4(data); 537 TRACE("data4<%lu>\n", attr->u.uvalue); 538 break; 539 540 case DW_FORM_data8: 541 attr->u.lluvalue = dwarf2_get_u8(data); 542 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue)); 543 break; 544 545 case DW_FORM_ref1: 546 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data); 547 TRACE("ref1<0x%lx>\n", attr->u.uvalue); 548 break; 549 550 case DW_FORM_ref2: 551 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data); 552 TRACE("ref2<0x%lx>\n", attr->u.uvalue); 553 break; 554 555 case DW_FORM_ref4: 556 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data); 557 TRACE("ref4<0x%lx>\n", attr->u.uvalue); 558 break; 559 560 case DW_FORM_ref8: 561 FIXME("Unhandled 64-bit support\n"); 562 break; 563 564 case DW_FORM_sdata: 565 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL); 566 break; 567 568 case DW_FORM_ref_udata: 569 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); 570 break; 571 572 case DW_FORM_udata: 573 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); 574 break; 575 576 case DW_FORM_string: 577 attr->u.string = (const char *)data; 578 TRACE("string<%s>\n", attr->u.string); 579 break; 580 581 case DW_FORM_strp: 582 { 583 unsigned long offset = dwarf2_get_u4(data); 584 attr->u.string = (const char*)ctx->sections[section_string].address + offset; 585 } 586 TRACE("strp<%s>\n", attr->u.string); 587 break; 588 589 case DW_FORM_block: 590 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr); 591 break; 592 593 case DW_FORM_block1: 594 attr->u.block.size = dwarf2_get_byte(data); 595 attr->u.block.ptr = data + 1; 596 break; 597 598 case DW_FORM_block2: 599 attr->u.block.size = dwarf2_get_u2(data); 600 attr->u.block.ptr = data + 2; 601 break; 602 603 case DW_FORM_block4: 604 attr->u.block.size = dwarf2_get_u4(data); 605 attr->u.block.ptr = data + 4; 606 break; 607 608 default: 609 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); 610 break; 611 } 612 } 613 614 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx, 615 const dwarf2_debug_info_t* di, 616 unsigned at, struct attribute* attr) 617 { 618 unsigned i, refidx = 0; 619 dwarf2_abbrev_entry_attr_t* abbrev_attr; 620 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL; 621 622 attr->gotten_from = attr_direct; 623 while (di) 624 { 625 ref_abbrev_attr = NULL; 626 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next) 627 { 628 if (abbrev_attr->attribute == at) 629 { 630 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr); 631 return TRUE; 632 } 633 if ((abbrev_attr->attribute == DW_AT_abstract_origin || 634 abbrev_attr->attribute == DW_AT_specification) && 635 at != DW_AT_sibling) 636 { 637 if (ref_abbrev_attr) 638 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute); 639 ref_abbrev_attr = abbrev_attr; 640 refidx = i; 641 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ? 642 attr_abstract_origin : attr_specification; 643 } 644 } 645 /* do we have either an abstract origin or a specification debug entry to look into ? */ 646 if (!ref_abbrev_attr) break; 647 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr); 648 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue))) 649 FIXME("Should have found the debug info entry\n"); 650 } 651 return FALSE; 652 } 653 654 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*); 655 656 #define Wine_DW_no_register 0x7FFFFFFF 657 658 static unsigned dwarf2_map_register(int regno) 659 { 660 if (regno == Wine_DW_no_register) 661 { 662 FIXME("What the heck map reg 0x%x\n",regno); 663 return 0; 664 } 665 return dbghelp_current_cpu->map_dwarf_register(regno, FALSE); 666 } 667 668 static enum location_error 669 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc, 670 HANDLE hproc, const struct location* frame) 671 { 672 DWORD_PTR tmp, stack[64]; 673 unsigned stk; 674 unsigned char op; 675 BOOL piece_found = FALSE; 676 677 stack[stk = 0] = 0; 678 679 loc->kind = loc_absolute; 680 loc->reg = Wine_DW_no_register; 681 682 while (ctx->data < ctx->end_data) 683 { 684 op = dwarf2_parse_byte(ctx); 685 686 if (op >= DW_OP_lit0 && op <= DW_OP_lit31) 687 stack[++stk] = op - DW_OP_lit0; 688 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31) 689 { 690 /* dbghelp APIs don't know how to cope with this anyway 691 * (for example 'long long' stored in two registers) 692 * FIXME: We should tell winedbg how to deal with it (sigh) 693 */ 694 if (!piece_found) 695 { 696 DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0); 697 if (loc->reg != Wine_DW_no_register) 698 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n", 699 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg, 700 dbghelp_current_cpu->fetch_regname(cvreg), cvreg); 701 loc->reg = cvreg; 702 } 703 loc->kind = loc_register; 704 } 705 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31) 706 { 707 /* dbghelp APIs don't know how to cope with this anyway 708 * (for example 'long long' stored in two registers) 709 * FIXME: We should tell winedbg how to deal with it (sigh) 710 */ 711 if (!piece_found) 712 { 713 DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0); 714 if (loc->reg != Wine_DW_no_register) 715 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n", 716 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg, 717 dbghelp_current_cpu->fetch_regname(cvreg), cvreg); 718 loc->reg = cvreg; 719 } 720 stack[++stk] = dwarf2_leb128_as_signed(ctx); 721 loc->kind = loc_regrel; 722 } 723 else switch (op) 724 { 725 case DW_OP_nop: break; 726 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break; 727 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break; 728 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break; 729 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break; 730 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break; 731 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break; 732 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break; 733 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break; 734 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break; 735 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break; 736 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break; 737 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break; 738 case DW_OP_drop: stk--; break; 739 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break; 740 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break; 741 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break; 742 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break; 743 case DW_OP_abs: stack[stk] = labs(stack[stk]); break; 744 case DW_OP_neg: stack[stk] = -stack[stk]; break; 745 case DW_OP_not: stack[stk] = ~stack[stk]; break; 746 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break; 747 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break; 748 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break; 749 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break; 750 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break; 751 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break; 752 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break; 753 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break; 754 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break; 755 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break; 756 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break; 757 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break; 758 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break; 759 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break; 760 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break; 761 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break; 762 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break; 763 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break; 764 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break; 765 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break; 766 case DW_OP_regx: 767 tmp = dwarf2_leb128_as_unsigned(ctx); 768 if (!piece_found) 769 { 770 if (loc->reg != Wine_DW_no_register) 771 FIXME("Only supporting one reg\n"); 772 loc->reg = dwarf2_map_register(tmp); 773 } 774 loc->kind = loc_register; 775 break; 776 case DW_OP_bregx: 777 tmp = dwarf2_leb128_as_unsigned(ctx); 778 if (loc->reg != Wine_DW_no_register) 779 FIXME("Only supporting one regx\n"); 780 loc->reg = dwarf2_map_register(tmp); 781 stack[++stk] = dwarf2_leb128_as_signed(ctx); 782 loc->kind = loc_regrel; 783 break; 784 case DW_OP_fbreg: 785 if (loc->reg != Wine_DW_no_register) 786 FIXME("Only supporting one reg (%s/%d -> -2)\n", 787 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg); 788 if (frame && frame->kind == loc_register) 789 { 790 loc->kind = loc_regrel; 791 loc->reg = frame->reg; 792 stack[++stk] = dwarf2_leb128_as_signed(ctx); 793 } 794 else if (frame && frame->kind == loc_regrel) 795 { 796 loc->kind = loc_regrel; 797 loc->reg = frame->reg; 798 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset; 799 } 800 else 801 { 802 /* FIXME: this could be later optimized by not recomputing 803 * this very location expression 804 */ 805 loc->kind = loc_dwarf2_block; 806 stack[++stk] = dwarf2_leb128_as_signed(ctx); 807 } 808 break; 809 case DW_OP_piece: 810 { 811 unsigned sz = dwarf2_leb128_as_unsigned(ctx); 812 WARN("Not handling OP_piece (size=%d)\n", sz); 813 piece_found = TRUE; 814 } 815 break; 816 case DW_OP_deref: 817 if (!stk) 818 { 819 FIXME("Unexpected empty stack\n"); 820 return loc_err_internal; 821 } 822 if (loc->reg != Wine_DW_no_register) 823 { 824 WARN("Too complex expression for deref\n"); 825 return loc_err_too_complex; 826 } 827 if (hproc) 828 { 829 DWORD_PTR addr = stack[stk--]; 830 DWORD_PTR deref; 831 832 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL)) 833 { 834 WARN("Couldn't read memory at %lx\n", addr); 835 return loc_err_cant_read; 836 } 837 stack[++stk] = deref; 838 } 839 else 840 { 841 loc->kind = loc_dwarf2_block; 842 } 843 break; 844 case DW_OP_deref_size: 845 if (!stk) 846 { 847 FIXME("Unexpected empty stack\n"); 848 return loc_err_internal; 849 } 850 if (loc->reg != Wine_DW_no_register) 851 { 852 WARN("Too complex expression for deref\n"); 853 return loc_err_too_complex; 854 } 855 if (hproc) 856 { 857 DWORD_PTR addr = stack[stk--]; 858 BYTE derefsize = dwarf2_parse_byte(ctx); 859 DWORD64 deref; 860 861 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL)) 862 { 863 WARN("Couldn't read memory at %lx\n", addr); 864 return loc_err_cant_read; 865 } 866 867 switch (derefsize) 868 { 869 case 1: stack[++stk] = *(unsigned char*)&deref; break; 870 case 2: stack[++stk] = *(unsigned short*)&deref; break; 871 case 4: stack[++stk] = *(DWORD*)&deref; break; 872 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break; 873 } 874 } 875 else 876 { 877 dwarf2_parse_byte(ctx); 878 loc->kind = loc_dwarf2_block; 879 } 880 break; 881 case DW_OP_stack_value: 882 /* Expected behaviour is that this is the last instruction of this 883 * expression and just the "top of stack" value should be put to loc->offset. */ 884 break; 885 default: 886 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */ 887 FIXME("Unhandled attr op: %x\n", op); 888 /* FIXME else unhandled extension */ 889 return loc_err_internal; 890 } 891 } 892 loc->offset = stack[stk]; 893 return 0; 894 } 895 896 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx, 897 const dwarf2_debug_info_t* di, 898 unsigned long dw, 899 struct location* loc, 900 const struct location* frame) 901 { 902 struct attribute xloc; 903 904 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE; 905 906 switch (xloc.form) 907 { 908 case DW_FORM_data1: case DW_FORM_data2: 909 case DW_FORM_udata: case DW_FORM_sdata: 910 loc->kind = loc_absolute; 911 loc->reg = 0; 912 loc->offset = xloc.u.uvalue; 913 return TRUE; 914 case DW_FORM_data4: case DW_FORM_data8: 915 loc->kind = loc_dwarf2_location_list; 916 loc->reg = Wine_DW_no_register; 917 loc->offset = xloc.u.uvalue; 918 return TRUE; 919 case DW_FORM_block: 920 case DW_FORM_block1: 921 case DW_FORM_block2: 922 case DW_FORM_block4: 923 break; 924 default: FIXME("Unsupported yet form %lx\n", xloc.form); 925 return FALSE; 926 } 927 928 /* assume we have a block form */ 929 930 if (xloc.u.block.size) 931 { 932 dwarf2_traverse_context_t lctx; 933 enum location_error err; 934 935 lctx.data = xloc.u.block.ptr; 936 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size; 937 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 938 939 err = compute_location(&lctx, loc, NULL, frame); 940 if (err < 0) 941 { 942 loc->kind = loc_error; 943 loc->reg = err; 944 } 945 else if (loc->kind == loc_dwarf2_block) 946 { 947 unsigned* ptr = pool_alloc(&ctx->module->pool, 948 sizeof(unsigned) + xloc.u.block.size); 949 *ptr = xloc.u.block.size; 950 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size); 951 loc->offset = (unsigned long)ptr; 952 } 953 } 954 return TRUE; 955 } 956 957 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx, 958 const dwarf2_debug_info_t* di) 959 { 960 struct attribute attr; 961 dwarf2_debug_info_t* type; 962 963 if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr)) 964 return NULL; 965 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue))) 966 { 967 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue); 968 return NULL; 969 } 970 if (!type->symt) 971 { 972 /* load the debug info entity */ 973 dwarf2_load_one_entry(ctx, type); 974 if (!type->symt) 975 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag); 976 } 977 return type->symt; 978 } 979 980 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name) 981 { 982 char* last; 983 struct attribute diname; 984 struct attribute spec; 985 986 if (di->abbrev->tag == DW_TAG_compile_unit) return name; 987 if (!ctx->cpp_name) 988 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME); 989 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1; 990 strcpy(last, name); 991 992 /* if the di is a definition, but has also a (previous) declaration, then scope must 993 * be gotten from declaration not definition 994 */ 995 if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct) 996 { 997 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue); 998 if (!di) 999 { 1000 FIXME("Should have found the debug info entry\n"); 1001 return NULL; 1002 } 1003 } 1004 1005 for (di = di->parent; di; di = di->parent) 1006 { 1007 switch (di->abbrev->tag) 1008 { 1009 case DW_TAG_namespace: 1010 case DW_TAG_structure_type: 1011 case DW_TAG_class_type: 1012 case DW_TAG_interface_type: 1013 case DW_TAG_union_type: 1014 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname)) 1015 { 1016 size_t len = strlen(diname.u.string); 1017 last -= 2 + len; 1018 if (last < ctx->cpp_name) return NULL; 1019 memcpy(last, diname.u.string, len); 1020 last[len] = last[len + 1] = ':'; 1021 } 1022 break; 1023 default: 1024 break; 1025 } 1026 } 1027 return last; 1028 } 1029 1030 /****************************************************************** 1031 * dwarf2_read_range 1032 * 1033 * read a range for a given debug_info (either using AT_range attribute, in which 1034 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes) 1035 * in all cases, range is relative to beginning of compilation unit 1036 */ 1037 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di, 1038 unsigned long* plow, unsigned long* phigh) 1039 { 1040 struct attribute range; 1041 1042 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range)) 1043 { 1044 dwarf2_traverse_context_t traverse; 1045 unsigned long low, high; 1046 1047 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue; 1048 traverse.end_data = ctx->sections[section_ranges].address + 1049 ctx->sections[section_ranges].size; 1050 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 1051 1052 *plow = ULONG_MAX; 1053 *phigh = 0; 1054 while (traverse.data + 2 * traverse.word_size < traverse.end_data) 1055 { 1056 low = dwarf2_parse_addr(&traverse); 1057 high = dwarf2_parse_addr(&traverse); 1058 if (low == 0 && high == 0) break; 1059 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n"); 1060 if (low < *plow) *plow = low; 1061 if (high > *phigh) *phigh = high; 1062 } 1063 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;} 1064 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;} 1065 1066 return TRUE; 1067 } 1068 else 1069 { 1070 struct attribute low_pc; 1071 struct attribute high_pc; 1072 1073 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) || 1074 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) 1075 return FALSE; 1076 *plow = low_pc.u.uvalue; 1077 *phigh = high_pc.u.uvalue; 1078 return TRUE; 1079 } 1080 } 1081 1082 /****************************************************************** 1083 * dwarf2_read_one_debug_info 1084 * 1085 * Loads into memory one debug info entry, and recursively its children (if any) 1086 */ 1087 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx, 1088 dwarf2_traverse_context_t* traverse, 1089 dwarf2_debug_info_t* parent_di, 1090 dwarf2_debug_info_t** pdi) 1091 { 1092 const dwarf2_abbrev_entry_t*abbrev; 1093 unsigned long entry_code; 1094 unsigned long offset; 1095 dwarf2_debug_info_t* di; 1096 dwarf2_debug_info_t* child; 1097 dwarf2_debug_info_t** where; 1098 dwarf2_abbrev_entry_attr_t* attr; 1099 unsigned i; 1100 struct attribute sibling; 1101 1102 offset = traverse->data - ctx->sections[ctx->section].address; 1103 entry_code = dwarf2_leb128_as_unsigned(traverse); 1104 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset); 1105 if (!entry_code) 1106 { 1107 *pdi = NULL; 1108 return TRUE; 1109 } 1110 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code); 1111 if (!abbrev) 1112 { 1113 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset); 1114 return FALSE; 1115 } 1116 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool); 1117 if (!di) return FALSE; 1118 di->abbrev = abbrev; 1119 di->symt = NULL; 1120 di->parent = parent_di; 1121 1122 if (abbrev->num_attr) 1123 { 1124 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*)); 1125 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next) 1126 { 1127 di->data[i] = traverse->data; 1128 dwarf2_swallow_attribute(traverse, attr); 1129 } 1130 } 1131 else di->data = NULL; 1132 if (abbrev->have_child) 1133 { 1134 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16); 1135 while (traverse->data < traverse->end_data) 1136 { 1137 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE; 1138 if (!child) break; 1139 where = vector_add(&di->children, &ctx->pool); 1140 if (!where) return FALSE; 1141 *where = child; 1142 } 1143 } 1144 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) && 1145 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue) 1146 { 1147 WARN("setting cursor for %s to next sibling <0x%lx>\n", 1148 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue); 1149 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue; 1150 } 1151 *pdi = di; 1152 return TRUE; 1153 } 1154 1155 static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx, 1156 dwarf2_debug_info_t* di) 1157 { 1158 struct attribute spec; 1159 1160 while (di) 1161 { 1162 if (di->abbrev->have_child) 1163 return &di->children; 1164 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break; 1165 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue))) 1166 FIXME("Should have found the debug info entry\n"); 1167 } 1168 return NULL; 1169 } 1170 1171 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx, 1172 dwarf2_debug_info_t* di) 1173 { 1174 struct attribute name; 1175 struct attribute size; 1176 struct attribute encoding; 1177 enum BasicType bt; 1178 int cache_idx = -1; 1179 if (di->symt) return di->symt; 1180 1181 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1182 1183 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1184 name.u.string = NULL; 1185 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; 1186 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void; 1187 1188 switch (encoding.u.uvalue) 1189 { 1190 case DW_ATE_void: bt = btVoid; break; 1191 case DW_ATE_address: bt = btULong; break; 1192 case DW_ATE_boolean: bt = btBool; break; 1193 case DW_ATE_complex_float: bt = btComplex; break; 1194 case DW_ATE_float: bt = btFloat; break; 1195 case DW_ATE_signed: bt = btInt; break; 1196 case DW_ATE_unsigned: bt = btUInt; break; 1197 case DW_ATE_signed_char: bt = btChar; break; 1198 case DW_ATE_unsigned_char: bt = btChar; break; 1199 default: bt = btNoType; break; 1200 } 1201 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt; 1202 switch (bt) 1203 { 1204 case btVoid: 1205 assert(size.u.uvalue == 0); 1206 cache_idx = sc_void; 1207 break; 1208 case btInt: 1209 switch (size.u.uvalue) 1210 { 1211 case 1: cache_idx = sc_int1; break; 1212 case 2: cache_idx = sc_int2; break; 1213 case 4: cache_idx = sc_int4; break; 1214 } 1215 break; 1216 default: break; 1217 } 1218 if (cache_idx != -1 && !ctx->symt_cache[cache_idx]) 1219 ctx->symt_cache[cache_idx] = di->symt; 1220 1221 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1222 return di->symt; 1223 } 1224 1225 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx, 1226 dwarf2_debug_info_t* di) 1227 { 1228 struct symt* ref_type; 1229 struct attribute name; 1230 1231 if (di->symt) return di->symt; 1232 1233 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code); 1234 1235 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1236 ref_type = dwarf2_lookup_type(ctx, di); 1237 1238 if (name.u.string) 1239 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt; 1240 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1241 return di->symt; 1242 } 1243 1244 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx, 1245 dwarf2_debug_info_t* di) 1246 { 1247 struct symt* ref_type; 1248 struct attribute size; 1249 1250 if (di->symt) return di->symt; 1251 1252 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1253 1254 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *); 1255 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1256 { 1257 ref_type = ctx->symt_cache[sc_void]; 1258 assert(ref_type); 1259 } 1260 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt; 1261 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1262 return di->symt; 1263 } 1264 1265 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx, 1266 dwarf2_debug_info_t* di) 1267 { 1268 struct symt* ref_type; 1269 struct symt* idx_type = NULL; 1270 struct attribute min, max, cnt; 1271 dwarf2_debug_info_t* child; 1272 unsigned int i; 1273 const struct vector* children; 1274 1275 if (di->symt) return di->symt; 1276 1277 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1278 1279 ref_type = dwarf2_lookup_type(ctx, di); 1280 1281 if (!(children = dwarf2_get_di_children(ctx, di))) 1282 { 1283 /* fake an array with unknown size */ 1284 /* FIXME: int4 even on 64bit machines??? */ 1285 idx_type = ctx->symt_cache[sc_int4]; 1286 min.u.uvalue = 0; 1287 max.u.uvalue = -1; 1288 } 1289 else for (i = 0; i < vector_length(children); i++) 1290 { 1291 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1292 switch (child->abbrev->tag) 1293 { 1294 case DW_TAG_subrange_type: 1295 idx_type = dwarf2_lookup_type(ctx, child); 1296 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min)) 1297 min.u.uvalue = 0; 1298 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max)) 1299 max.u.uvalue = 0; 1300 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt)) 1301 max.u.uvalue = min.u.uvalue + cnt.u.uvalue; 1302 break; 1303 default: 1304 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1305 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1306 break; 1307 } 1308 } 1309 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt; 1310 return di->symt; 1311 } 1312 1313 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx, 1314 dwarf2_debug_info_t* di) 1315 { 1316 struct symt* ref_type; 1317 1318 if (di->symt) return di->symt; 1319 1320 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1321 1322 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1323 { 1324 ref_type = ctx->symt_cache[sc_void]; 1325 assert(ref_type); 1326 } 1327 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1328 di->symt = ref_type; 1329 1330 return ref_type; 1331 } 1332 1333 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx, 1334 dwarf2_debug_info_t* di) 1335 { 1336 struct symt* ref_type; 1337 1338 if (di->symt) return di->symt; 1339 1340 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1341 1342 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1343 { 1344 ref_type = ctx->symt_cache[sc_void]; 1345 assert(ref_type); 1346 } 1347 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1348 di->symt = ref_type; 1349 1350 return ref_type; 1351 } 1352 1353 static struct symt* dwarf2_parse_unspecified_type(dwarf2_parse_context_t* ctx, 1354 dwarf2_debug_info_t* di) 1355 { 1356 struct attribute name; 1357 struct attribute size; 1358 struct symt_basic *basic; 1359 1360 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1361 1362 if (di->symt) return di->symt; 1363 1364 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1365 name.u.string = "void"; 1366 size.u.uvalue = sizeof(void *); 1367 1368 basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue); 1369 di->symt = &basic->symt; 1370 1371 if (!ctx->symt_cache[sc_void]) 1372 ctx->symt_cache[sc_void] = di->symt; 1373 1374 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1375 return di->symt; 1376 } 1377 1378 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx, 1379 dwarf2_debug_info_t* di) 1380 { 1381 struct symt* ref_type = NULL; 1382 1383 if (di->symt) return di->symt; 1384 1385 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1386 1387 ref_type = dwarf2_lookup_type(ctx, di); 1388 /* FIXME: for now, we hard-wire C++ references to pointers */ 1389 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt; 1390 1391 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1392 1393 return di->symt; 1394 } 1395 1396 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx, 1397 dwarf2_debug_info_t* di, 1398 struct symt_udt* parent) 1399 { 1400 struct symt* elt_type; 1401 struct attribute name; 1402 struct attribute bit_size; 1403 struct attribute bit_offset; 1404 struct location loc; 1405 1406 assert(parent); 1407 1408 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1409 1410 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1411 elt_type = dwarf2_lookup_type(ctx, di); 1412 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL)) 1413 { 1414 if (loc.kind != loc_absolute) 1415 { 1416 FIXME("Found register, while not expecting it\n"); 1417 loc.offset = 0; 1418 } 1419 else 1420 TRACE("found member_location at %s -> %lu\n", 1421 dwarf2_debug_ctx(ctx), loc.offset); 1422 } 1423 else 1424 loc.offset = 0; 1425 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size)) 1426 bit_size.u.uvalue = 0; 1427 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset)) 1428 { 1429 /* FIXME: we should only do this when implementation is LSB (which is 1430 * the case on i386 processors) 1431 */ 1432 struct attribute nbytes; 1433 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes)) 1434 { 1435 DWORD64 size; 1436 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ? 1437 (unsigned long)size : 0; 1438 } 1439 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue; 1440 } 1441 else bit_offset.u.uvalue = 0; 1442 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type, 1443 (loc.offset << 3) + bit_offset.u.uvalue, 1444 bit_size.u.uvalue); 1445 1446 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1447 } 1448 1449 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx, 1450 dwarf2_debug_info_t* di); 1451 1452 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx, 1453 dwarf2_debug_info_t* di, 1454 enum UdtKind udt) 1455 { 1456 struct attribute name; 1457 struct attribute size; 1458 struct vector* children; 1459 dwarf2_debug_info_t*child; 1460 unsigned int i; 1461 1462 if (di->symt) return di->symt; 1463 1464 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1465 1466 /* quirk... FIXME provide real support for anonymous UDTs */ 1467 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1468 name.u.string = "zz_anon_zz"; 1469 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; 1470 1471 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string), 1472 size.u.uvalue, udt)->symt; 1473 1474 children = dwarf2_get_di_children(ctx, di); 1475 if (children) for (i = 0; i < vector_length(children); i++) 1476 { 1477 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1478 1479 switch (child->abbrev->tag) 1480 { 1481 case DW_TAG_array_type: 1482 dwarf2_parse_array_type(ctx, di); 1483 break; 1484 case DW_TAG_member: 1485 /* FIXME: should I follow the sibling stuff ?? */ 1486 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt); 1487 break; 1488 case DW_TAG_enumeration_type: 1489 dwarf2_parse_enumeration_type(ctx, child); 1490 break; 1491 case DW_TAG_subprogram: 1492 dwarf2_parse_subprogram(ctx, child); 1493 break; 1494 case DW_TAG_const_type: 1495 dwarf2_parse_const_type(ctx, child); 1496 break; 1497 case DW_TAG_structure_type: 1498 case DW_TAG_class_type: 1499 case DW_TAG_union_type: 1500 case DW_TAG_typedef: 1501 /* FIXME: we need to handle nested udt definitions */ 1502 case DW_TAG_inheritance: 1503 case DW_TAG_template_type_param: 1504 case DW_TAG_template_value_param: 1505 case DW_TAG_variable: 1506 case DW_TAG_imported_declaration: 1507 case DW_TAG_ptr_to_member_type: 1508 case DW_TAG_GNU_template_parameter_pack: 1509 case DW_TAG_GNU_formal_parameter_pack: 1510 /* FIXME: some C++ related stuff */ 1511 break; 1512 default: 1513 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1514 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1515 break; 1516 } 1517 } 1518 1519 return di->symt; 1520 } 1521 1522 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx, 1523 dwarf2_debug_info_t* di, 1524 struct symt_enum* parent) 1525 { 1526 struct attribute name; 1527 struct attribute value; 1528 1529 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1530 1531 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return; 1532 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0; 1533 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue); 1534 1535 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1536 } 1537 1538 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, 1539 dwarf2_debug_info_t* di) 1540 { 1541 struct attribute name; 1542 struct attribute size; 1543 struct symt_basic* basetype; 1544 struct vector* children; 1545 dwarf2_debug_info_t*child; 1546 unsigned int i; 1547 1548 if (di->symt) return di->symt; 1549 1550 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1551 1552 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1553 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4; 1554 1555 switch (size.u.uvalue) /* FIXME: that's wrong */ 1556 { 1557 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break; 1558 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break; 1559 default: 1560 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break; 1561 } 1562 1563 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt; 1564 1565 children = dwarf2_get_di_children(ctx, di); 1566 /* FIXME: should we use the sibling stuff ?? */ 1567 if (children) for (i = 0; i < vector_length(children); i++) 1568 { 1569 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1570 1571 switch (child->abbrev->tag) 1572 { 1573 case DW_TAG_enumerator: 1574 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt); 1575 break; 1576 default: 1577 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1578 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1579 } 1580 } 1581 return di->symt; 1582 } 1583 1584 /* structure used to pass information around when parsing a subprogram */ 1585 typedef struct dwarf2_subprogram_s 1586 { 1587 dwarf2_parse_context_t* ctx; 1588 struct symt_function* func; 1589 BOOL non_computed_variable; 1590 struct location frame; 1591 } dwarf2_subprogram_t; 1592 1593 /****************************************************************** 1594 * dwarf2_parse_variable 1595 * 1596 * Parses any variable (parameter, local/global variable) 1597 */ 1598 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm, 1599 struct symt_block* block, 1600 dwarf2_debug_info_t* di) 1601 { 1602 struct symt* param_type; 1603 struct attribute name, value; 1604 struct location loc; 1605 BOOL is_pmt; 1606 1607 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1608 1609 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter; 1610 param_type = dwarf2_lookup_type(subpgm->ctx, di); 1611 1612 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) { 1613 /* cannot do much without the name, the functions below won't like it. */ 1614 return; 1615 } 1616 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location, 1617 &loc, &subpgm->frame)) 1618 { 1619 struct attribute ext; 1620 1621 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n", 1622 name.u.string, loc.kind, loc.offset, loc.reg, 1623 dwarf2_debug_ctx(subpgm->ctx)); 1624 1625 switch (loc.kind) 1626 { 1627 case loc_error: 1628 break; 1629 case loc_absolute: 1630 /* it's a global variable */ 1631 /* FIXME: we don't handle its scope yet */ 1632 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext)) 1633 ext.u.uvalue = 0; 1634 loc.offset += subpgm->ctx->load_offset; 1635 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland, 1636 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue, 1637 loc, 0, param_type); 1638 break; 1639 default: 1640 subpgm->non_computed_variable = TRUE; 1641 /* fall through */ 1642 case loc_register: 1643 case loc_regrel: 1644 /* either a pmt/variable relative to frame pointer or 1645 * pmt/variable in a register 1646 */ 1647 assert(subpgm->func); 1648 symt_add_func_local(subpgm->ctx->module, subpgm->func, 1649 is_pmt ? DataIsParam : DataIsLocal, 1650 &loc, block, param_type, name.u.string); 1651 break; 1652 } 1653 } 1654 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value)) 1655 { 1656 VARIANT v; 1657 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string); 1658 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string); 1659 switch (value.form) 1660 { 1661 case DW_FORM_data1: 1662 case DW_FORM_data2: 1663 case DW_FORM_data4: 1664 case DW_FORM_udata: 1665 case DW_FORM_addr: 1666 v.n1.n2.vt = VT_UI4; 1667 v.n1.n2.n3.lVal = value.u.uvalue; 1668 break; 1669 1670 case DW_FORM_data8: 1671 v.n1.n2.vt = VT_UI8; 1672 v.n1.n2.n3.llVal = value.u.lluvalue; 1673 break; 1674 1675 case DW_FORM_sdata: 1676 v.n1.n2.vt = VT_I4; 1677 v.n1.n2.n3.lVal = value.u.svalue; 1678 break; 1679 1680 case DW_FORM_strp: 1681 case DW_FORM_string: 1682 /* FIXME: native doesn't report const strings from here !! 1683 * however, the value of the string is in the code somewhere 1684 */ 1685 v.n1.n2.vt = VT_I1 | VT_BYREF; 1686 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string); 1687 break; 1688 1689 case DW_FORM_block: 1690 case DW_FORM_block1: 1691 case DW_FORM_block2: 1692 case DW_FORM_block4: 1693 v.n1.n2.vt = VT_I4; 1694 switch (value.u.block.size) 1695 { 1696 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break; 1697 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break; 1698 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break; 1699 default: 1700 v.n1.n2.vt = VT_I1 | VT_BYREF; 1701 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size); 1702 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size); 1703 } 1704 break; 1705 1706 default: 1707 FIXME("Unsupported form for const value %s (%lx)\n", 1708 name.u.string, value.form); 1709 v.n1.n2.vt = VT_EMPTY; 1710 } 1711 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland, 1712 name.u.string, param_type, &v)->symt; 1713 } 1714 else 1715 { 1716 /* variable has been optimized away... report anyway */ 1717 loc.kind = loc_error; 1718 loc.reg = loc_err_no_location; 1719 if (subpgm->func) 1720 { 1721 symt_add_func_local(subpgm->ctx->module, subpgm->func, 1722 is_pmt ? DataIsParam : DataIsLocal, 1723 &loc, block, param_type, name.u.string); 1724 } 1725 else 1726 { 1727 WARN("dropping global variable %s which has been optimized away\n", name.u.string); 1728 } 1729 } 1730 if (is_pmt && subpgm->func && subpgm->func->type) 1731 symt_add_function_signature_parameter(subpgm->ctx->module, 1732 (struct symt_function_signature*)subpgm->func->type, 1733 param_type); 1734 1735 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n"); 1736 } 1737 1738 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm, 1739 const dwarf2_debug_info_t* di) 1740 { 1741 struct attribute name; 1742 struct attribute low_pc; 1743 struct location loc; 1744 1745 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1746 1747 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0; 1748 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) 1749 name.u.string = NULL; 1750 1751 loc.kind = loc_absolute; 1752 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue; 1753 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel, 1754 &loc, name.u.string); 1755 } 1756 1757 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, 1758 struct symt_block* parent_block, 1759 dwarf2_debug_info_t* di); 1760 1761 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx, 1762 dwarf2_debug_info_t* di); 1763 1764 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm, 1765 struct symt_block* parent_block, 1766 dwarf2_debug_info_t* di) 1767 { 1768 struct symt_block* block; 1769 unsigned long low_pc, high_pc; 1770 struct vector* children; 1771 dwarf2_debug_info_t*child; 1772 unsigned int i; 1773 1774 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1775 1776 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc)) 1777 { 1778 FIXME("cannot read range\n"); 1779 return; 1780 } 1781 1782 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, 1783 subpgm->ctx->load_offset + low_pc - subpgm->func->address, 1784 high_pc - low_pc); 1785 1786 children = dwarf2_get_di_children(subpgm->ctx, di); 1787 if (children) for (i = 0; i < vector_length(children); i++) 1788 { 1789 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1790 1791 switch (child->abbrev->tag) 1792 { 1793 case DW_TAG_formal_parameter: 1794 case DW_TAG_variable: 1795 dwarf2_parse_variable(subpgm, block, child); 1796 break; 1797 case DW_TAG_lexical_block: 1798 dwarf2_parse_subprogram_block(subpgm, block, child); 1799 break; 1800 case DW_TAG_inlined_subroutine: 1801 dwarf2_parse_inlined_subroutine(subpgm, block, child); 1802 break; 1803 case DW_TAG_label: 1804 dwarf2_parse_subprogram_label(subpgm, child); 1805 break; 1806 case DW_TAG_GNU_call_site: 1807 /* this isn't properly supported by dbghelp interface. skip it for now */ 1808 break; 1809 default: 1810 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1811 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), 1812 dwarf2_debug_di(di)); 1813 } 1814 } 1815 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0); 1816 } 1817 1818 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, 1819 struct symt_block* parent_block, 1820 dwarf2_debug_info_t* di) 1821 { 1822 struct symt_block* block; 1823 unsigned long low_pc, high_pc; 1824 struct vector* children; 1825 dwarf2_debug_info_t*child; 1826 unsigned int i; 1827 1828 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1829 1830 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc)) 1831 { 1832 WARN("no range\n"); 1833 return; 1834 } 1835 1836 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, 1837 subpgm->ctx->load_offset + low_pc - subpgm->func->address, 1838 high_pc - low_pc); 1839 1840 children = dwarf2_get_di_children(subpgm->ctx, di); 1841 if (children) for (i = 0; i < vector_length(children); i++) 1842 { 1843 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1844 1845 switch (child->abbrev->tag) 1846 { 1847 case DW_TAG_inlined_subroutine: 1848 dwarf2_parse_inlined_subroutine(subpgm, block, child); 1849 break; 1850 case DW_TAG_variable: 1851 dwarf2_parse_variable(subpgm, block, child); 1852 break; 1853 case DW_TAG_pointer_type: 1854 dwarf2_parse_pointer_type(subpgm->ctx, di); 1855 break; 1856 case DW_TAG_subroutine_type: 1857 dwarf2_parse_subroutine_type(subpgm->ctx, di); 1858 break; 1859 case DW_TAG_const_type: 1860 dwarf2_parse_const_type(subpgm->ctx, di); 1861 break; 1862 case DW_TAG_lexical_block: 1863 dwarf2_parse_subprogram_block(subpgm, block, child); 1864 break; 1865 case DW_TAG_subprogram: 1866 /* FIXME: likely a declaration (to be checked) 1867 * skip it for now 1868 */ 1869 break; 1870 case DW_TAG_formal_parameter: 1871 /* FIXME: likely elements for exception handling (GCC flavor) 1872 * Skip it for now 1873 */ 1874 break; 1875 case DW_TAG_imported_module: 1876 /* C++ stuff to be silenced (for now) */ 1877 break; 1878 case DW_TAG_GNU_call_site: 1879 /* this isn't properly supported by dbghelp interface. skip it for now */ 1880 break; 1881 case DW_TAG_label: 1882 dwarf2_parse_subprogram_label(subpgm, child); 1883 break; 1884 case DW_TAG_class_type: 1885 case DW_TAG_structure_type: 1886 case DW_TAG_union_type: 1887 case DW_TAG_enumeration_type: 1888 case DW_TAG_typedef: 1889 /* the type referred to will be loaded when we need it, so skip it */ 1890 break; 1891 default: 1892 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1893 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1894 } 1895 } 1896 1897 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0); 1898 } 1899 1900 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx, 1901 dwarf2_debug_info_t* di) 1902 { 1903 struct attribute name; 1904 unsigned long low_pc, high_pc; 1905 struct attribute is_decl; 1906 struct attribute inline_flags; 1907 struct symt* ret_type; 1908 struct symt_function_signature* sig_type; 1909 dwarf2_subprogram_t subpgm; 1910 struct vector* children; 1911 dwarf2_debug_info_t* child; 1912 unsigned int i; 1913 1914 if (di->symt) return di->symt; 1915 1916 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1917 1918 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1919 { 1920 WARN("No name for function... dropping function\n"); 1921 return NULL; 1922 } 1923 /* if it's an abstract representation of an inline function, there should be 1924 * a concrete object that we'll handle 1925 */ 1926 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) && 1927 inline_flags.u.uvalue != DW_INL_not_inlined) 1928 { 1929 TRACE("Function %s declared as inlined (%ld)... skipping\n", 1930 debugstr_a(name.u.string), inline_flags.u.uvalue); 1931 return NULL; 1932 } 1933 1934 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) && 1935 is_decl.u.uvalue && is_decl.gotten_from == attr_direct) 1936 { 1937 /* it's a real declaration, skip it */ 1938 return NULL; 1939 } 1940 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc)) 1941 { 1942 WARN("cannot get range for %s\n", name.u.string); 1943 return NULL; 1944 } 1945 /* As functions (defined as inline assembly) get debug info with dwarf 1946 * (not the case for stabs), we just drop Wine's thunks here... 1947 * Actual thunks will be created in elf_module from the symbol table 1948 */ 1949 #ifndef DBGHELP_STATIC_LIB 1950 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0) 1951 return NULL; 1952 #endif 1953 if (!(ret_type = dwarf2_lookup_type(ctx, di))) 1954 { 1955 ret_type = ctx->symt_cache[sc_void]; 1956 assert(ret_type); 1957 } 1958 /* FIXME: assuming C source code */ 1959 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); 1960 subpgm.func = symt_new_function(ctx->module, ctx->compiland, 1961 dwarf2_get_cpp_name(ctx, di, name.u.string), 1962 ctx->load_offset + low_pc, high_pc - low_pc, 1963 &sig_type->symt); 1964 di->symt = &subpgm.func->symt; 1965 subpgm.ctx = ctx; 1966 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base, 1967 &subpgm.frame, NULL)) 1968 { 1969 /* on stack !! */ 1970 subpgm.frame.kind = loc_regrel; 1971 subpgm.frame.reg = dbghelp_current_cpu->frame_regno; 1972 subpgm.frame.offset = 0; 1973 } 1974 subpgm.non_computed_variable = FALSE; 1975 1976 children = dwarf2_get_di_children(ctx, di); 1977 if (children) for (i = 0; i < vector_length(children); i++) 1978 { 1979 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1980 1981 switch (child->abbrev->tag) 1982 { 1983 case DW_TAG_variable: 1984 case DW_TAG_formal_parameter: 1985 dwarf2_parse_variable(&subpgm, NULL, child); 1986 break; 1987 case DW_TAG_lexical_block: 1988 dwarf2_parse_subprogram_block(&subpgm, NULL, child); 1989 break; 1990 case DW_TAG_inlined_subroutine: 1991 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child); 1992 break; 1993 case DW_TAG_pointer_type: 1994 dwarf2_parse_pointer_type(subpgm.ctx, di); 1995 break; 1996 case DW_TAG_const_type: 1997 dwarf2_parse_const_type(subpgm.ctx, di); 1998 break; 1999 case DW_TAG_subprogram: 2000 /* FIXME: likely a declaration (to be checked) 2001 * skip it for now 2002 */ 2003 break; 2004 case DW_TAG_label: 2005 dwarf2_parse_subprogram_label(&subpgm, child); 2006 break; 2007 case DW_TAG_class_type: 2008 case DW_TAG_structure_type: 2009 case DW_TAG_union_type: 2010 case DW_TAG_enumeration_type: 2011 case DW_TAG_typedef: 2012 /* the type referred to will be loaded when we need it, so skip it */ 2013 break; 2014 case DW_TAG_unspecified_parameters: 2015 case DW_TAG_template_type_param: 2016 case DW_TAG_template_value_param: 2017 case DW_TAG_GNU_call_site: 2018 case DW_TAG_GNU_template_parameter_pack: 2019 case DW_TAG_GNU_formal_parameter_pack: 2020 /* FIXME: no support in dbghelp's internals so far */ 2021 break; 2022 default: 2023 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 2024 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2025 } 2026 } 2027 2028 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user) 2029 { 2030 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom, 2031 &subpgm.frame, NULL); 2032 } 2033 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func); 2034 2035 return di->symt; 2036 } 2037 2038 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx, 2039 dwarf2_debug_info_t* di) 2040 { 2041 struct symt* ret_type; 2042 struct symt_function_signature* sig_type; 2043 struct vector* children; 2044 dwarf2_debug_info_t* child; 2045 unsigned int i; 2046 2047 if (di->symt) return di->symt; 2048 2049 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2050 2051 if (!(ret_type = dwarf2_lookup_type(ctx, di))) 2052 { 2053 ret_type = ctx->symt_cache[sc_void]; 2054 assert(ret_type); 2055 } 2056 2057 /* FIXME: assuming C source code */ 2058 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); 2059 2060 children = dwarf2_get_di_children(ctx, di); 2061 if (children) for (i = 0; i < vector_length(children); i++) 2062 { 2063 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2064 2065 switch (child->abbrev->tag) 2066 { 2067 case DW_TAG_formal_parameter: 2068 symt_add_function_signature_parameter(ctx->module, sig_type, 2069 dwarf2_lookup_type(ctx, child)); 2070 break; 2071 case DW_TAG_unspecified_parameters: 2072 WARN("Unsupported unspecified parameters\n"); 2073 break; 2074 } 2075 } 2076 2077 return di->symt = &sig_type->symt; 2078 } 2079 2080 static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx, 2081 dwarf2_debug_info_t* di) 2082 { 2083 struct vector* children; 2084 dwarf2_debug_info_t* child; 2085 unsigned int i; 2086 2087 if (di->symt) return; 2088 2089 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2090 2091 di->symt = ctx->symt_cache[sc_void]; 2092 2093 children = dwarf2_get_di_children(ctx, di); 2094 if (children) for (i = 0; i < vector_length(children); i++) 2095 { 2096 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2097 dwarf2_load_one_entry(ctx, child); 2098 } 2099 } 2100 2101 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx, 2102 dwarf2_debug_info_t* di) 2103 { 2104 switch (di->abbrev->tag) 2105 { 2106 case DW_TAG_typedef: 2107 dwarf2_parse_typedef(ctx, di); 2108 break; 2109 case DW_TAG_base_type: 2110 dwarf2_parse_base_type(ctx, di); 2111 break; 2112 case DW_TAG_pointer_type: 2113 dwarf2_parse_pointer_type(ctx, di); 2114 break; 2115 case DW_TAG_class_type: 2116 dwarf2_parse_udt_type(ctx, di, UdtClass); 2117 break; 2118 case DW_TAG_structure_type: 2119 dwarf2_parse_udt_type(ctx, di, UdtStruct); 2120 break; 2121 case DW_TAG_union_type: 2122 dwarf2_parse_udt_type(ctx, di, UdtUnion); 2123 break; 2124 case DW_TAG_array_type: 2125 dwarf2_parse_array_type(ctx, di); 2126 break; 2127 case DW_TAG_const_type: 2128 dwarf2_parse_const_type(ctx, di); 2129 break; 2130 case DW_TAG_volatile_type: 2131 dwarf2_parse_volatile_type(ctx, di); 2132 break; 2133 case DW_TAG_unspecified_type: 2134 dwarf2_parse_unspecified_type(ctx, di); 2135 break; 2136 case DW_TAG_reference_type: 2137 dwarf2_parse_reference_type(ctx, di); 2138 break; 2139 case DW_TAG_enumeration_type: 2140 dwarf2_parse_enumeration_type(ctx, di); 2141 break; 2142 case DW_TAG_subprogram: 2143 dwarf2_parse_subprogram(ctx, di); 2144 break; 2145 case DW_TAG_subroutine_type: 2146 dwarf2_parse_subroutine_type(ctx, di); 2147 break; 2148 case DW_TAG_variable: 2149 { 2150 dwarf2_subprogram_t subpgm; 2151 2152 subpgm.ctx = ctx; 2153 subpgm.func = NULL; 2154 subpgm.frame.kind = loc_absolute; 2155 subpgm.frame.offset = 0; 2156 subpgm.frame.reg = Wine_DW_no_register; 2157 dwarf2_parse_variable(&subpgm, NULL, di); 2158 } 2159 break; 2160 case DW_TAG_namespace: 2161 dwarf2_parse_namespace(ctx, di); 2162 break; 2163 /* silence a couple of C++ defines */ 2164 case DW_TAG_imported_module: 2165 case DW_TAG_imported_declaration: 2166 case DW_TAG_ptr_to_member_type: 2167 break; 2168 default: 2169 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n", 2170 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code); 2171 } 2172 } 2173 2174 static void dwarf2_set_line_number(struct module* module, unsigned long address, 2175 const struct vector* v, unsigned file, unsigned line) 2176 { 2177 struct symt_function* func; 2178 struct symt_ht* symt; 2179 unsigned* psrc; 2180 2181 if (!file || !(psrc = vector_at(v, file - 1))) return; 2182 2183 TRACE("%s %lx %s %u\n", 2184 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line); 2185 if (!(symt = symt_find_nearest(module, address)) || 2186 symt->symt.tag != SymTagFunction) return; 2187 func = (struct symt_function*)symt; 2188 symt_add_func_line(module, func, *psrc, line, address - func->address); 2189 } 2190 2191 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections, 2192 dwarf2_parse_context_t* ctx, 2193 const char* compile_dir, 2194 unsigned long offset) 2195 { 2196 dwarf2_traverse_context_t traverse; 2197 unsigned long length; 2198 unsigned insn_size, default_stmt; 2199 unsigned line_range, opcode_base; 2200 int line_base; 2201 const unsigned char* opcode_len; 2202 struct vector dirs; 2203 struct vector files; 2204 const char** p; 2205 2206 /* section with line numbers stripped */ 2207 if (sections[section_line].address == IMAGE_NO_MAP) 2208 return FALSE; 2209 2210 if (offset + 4 > sections[section_line].size) 2211 { 2212 WARN("out of bounds offset\n"); 2213 return FALSE; 2214 } 2215 traverse.data = sections[section_line].address + offset; 2216 traverse.end_data = traverse.data + 4; 2217 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 2218 2219 length = dwarf2_parse_u4(&traverse); 2220 traverse.end_data = sections[section_line].address + offset + length; 2221 2222 if (offset + 4 + length > sections[section_line].size) 2223 { 2224 WARN("out of bounds header\n"); 2225 return FALSE; 2226 } 2227 dwarf2_parse_u2(&traverse); /* version */ 2228 dwarf2_parse_u4(&traverse); /* header_len */ 2229 insn_size = dwarf2_parse_byte(&traverse); 2230 default_stmt = dwarf2_parse_byte(&traverse); 2231 line_base = (signed char)dwarf2_parse_byte(&traverse); 2232 line_range = dwarf2_parse_byte(&traverse); 2233 opcode_base = dwarf2_parse_byte(&traverse); 2234 2235 opcode_len = traverse.data; 2236 traverse.data += opcode_base - 1; 2237 2238 vector_init(&dirs, sizeof(const char*), 4); 2239 p = vector_add(&dirs, &ctx->pool); 2240 *p = compile_dir ? compile_dir : "."; 2241 while (*traverse.data) 2242 { 2243 const char* rel = (const char*)traverse.data; 2244 unsigned rellen = strlen(rel); 2245 TRACE("Got include %s\n", rel); 2246 traverse.data += rellen + 1; 2247 p = vector_add(&dirs, &ctx->pool); 2248 2249 if (*rel == '/' || !compile_dir) 2250 *p = rel; 2251 else 2252 { 2253 /* include directory relative to compile directory */ 2254 unsigned baselen = strlen(compile_dir); 2255 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1); 2256 strcpy(tmp, compile_dir); 2257 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/'; 2258 strcpy(&tmp[baselen], rel); 2259 *p = tmp; 2260 } 2261 2262 } 2263 traverse.data++; 2264 2265 vector_init(&files, sizeof(unsigned), 16); 2266 while (*traverse.data) 2267 { 2268 unsigned int dir_index, mod_time; 2269 const char* name; 2270 const char* dir; 2271 unsigned* psrc; 2272 2273 name = (const char*)traverse.data; 2274 traverse.data += strlen(name) + 1; 2275 dir_index = dwarf2_leb128_as_unsigned(&traverse); 2276 mod_time = dwarf2_leb128_as_unsigned(&traverse); 2277 length = dwarf2_leb128_as_unsigned(&traverse); 2278 dir = *(const char**)vector_at(&dirs, dir_index); 2279 TRACE("Got file %s/%s (%u,%lu)\n", dir, name, mod_time, length); 2280 psrc = vector_add(&files, &ctx->pool); 2281 *psrc = source_new(ctx->module, dir, name); 2282 } 2283 traverse.data++; 2284 2285 while (traverse.data < traverse.end_data) 2286 { 2287 unsigned long address = 0; 2288 unsigned file = 1; 2289 unsigned line = 1; 2290 unsigned is_stmt = default_stmt; 2291 BOOL end_sequence = FALSE; 2292 unsigned opcode, extopcode, i; 2293 2294 while (!end_sequence) 2295 { 2296 opcode = dwarf2_parse_byte(&traverse); 2297 TRACE("Got opcode %x\n", opcode); 2298 2299 if (opcode >= opcode_base) 2300 { 2301 unsigned delta = opcode - opcode_base; 2302 2303 address += (delta / line_range) * insn_size; 2304 line += line_base + (delta % line_range); 2305 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2306 } 2307 else 2308 { 2309 switch (opcode) 2310 { 2311 case DW_LNS_copy: 2312 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2313 break; 2314 case DW_LNS_advance_pc: 2315 address += insn_size * dwarf2_leb128_as_unsigned(&traverse); 2316 break; 2317 case DW_LNS_advance_line: 2318 line += dwarf2_leb128_as_signed(&traverse); 2319 break; 2320 case DW_LNS_set_file: 2321 file = dwarf2_leb128_as_unsigned(&traverse); 2322 break; 2323 case DW_LNS_set_column: 2324 dwarf2_leb128_as_unsigned(&traverse); 2325 break; 2326 case DW_LNS_negate_stmt: 2327 is_stmt = !is_stmt; 2328 break; 2329 case DW_LNS_set_basic_block: 2330 break; 2331 case DW_LNS_const_add_pc: 2332 address += ((255 - opcode_base) / line_range) * insn_size; 2333 break; 2334 case DW_LNS_fixed_advance_pc: 2335 address += dwarf2_parse_u2(&traverse); 2336 break; 2337 case DW_LNS_extended_op: 2338 dwarf2_leb128_as_unsigned(&traverse); 2339 extopcode = dwarf2_parse_byte(&traverse); 2340 switch (extopcode) 2341 { 2342 case DW_LNE_end_sequence: 2343 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2344 end_sequence = TRUE; 2345 break; 2346 case DW_LNE_set_address: 2347 address = ctx->load_offset + dwarf2_parse_addr(&traverse); 2348 break; 2349 case DW_LNE_define_file: 2350 FIXME("not handled define file %s\n", traverse.data); 2351 traverse.data += strlen((const char *)traverse.data) + 1; 2352 dwarf2_leb128_as_unsigned(&traverse); 2353 dwarf2_leb128_as_unsigned(&traverse); 2354 dwarf2_leb128_as_unsigned(&traverse); 2355 break; 2356 case DW_LNE_set_discriminator: 2357 { 2358 unsigned descr; 2359 2360 descr = dwarf2_leb128_as_unsigned(&traverse); 2361 WARN("not handled discriminator %x\n", descr); 2362 } 2363 break; 2364 default: 2365 FIXME("Unsupported extended opcode %x\n", extopcode); 2366 break; 2367 } 2368 break; 2369 default: 2370 WARN("Unsupported opcode %x\n", opcode); 2371 for (i = 0; i < opcode_len[opcode]; i++) 2372 dwarf2_leb128_as_unsigned(&traverse); 2373 break; 2374 } 2375 } 2376 } 2377 } 2378 return TRUE; 2379 } 2380 2381 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections, 2382 struct module* module, 2383 const struct elf_thunk_area* thunks, 2384 dwarf2_traverse_context_t* mod_ctx, 2385 unsigned long load_offset) 2386 { 2387 dwarf2_parse_context_t ctx; 2388 dwarf2_traverse_context_t abbrev_ctx; 2389 dwarf2_debug_info_t* di; 2390 dwarf2_traverse_context_t cu_ctx; 2391 const unsigned char* comp_unit_start = mod_ctx->data; 2392 unsigned long cu_length; 2393 unsigned short cu_version; 2394 unsigned long cu_abbrev_offset; 2395 BOOL ret = FALSE; 2396 2397 cu_length = dwarf2_parse_u4(mod_ctx); 2398 cu_ctx.data = mod_ctx->data; 2399 cu_ctx.end_data = mod_ctx->data + cu_length; 2400 mod_ctx->data += cu_length; 2401 cu_version = dwarf2_parse_u2(&cu_ctx); 2402 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx); 2403 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx); 2404 2405 TRACE("Compilation Unit Header found at 0x%x:\n", 2406 (int)(comp_unit_start - sections[section_debug].address)); 2407 TRACE("- length: %lu\n", cu_length); 2408 TRACE("- version: %u\n", cu_version); 2409 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset); 2410 TRACE("- word_size: %u\n", cu_ctx.word_size); 2411 2412 if (cu_version != 2) 2413 { 2414 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n", 2415 cu_version); 2416 return FALSE; 2417 } 2418 2419 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size; 2420 mod_ctx->word_size = cu_ctx.word_size; 2421 2422 pool_init(&ctx.pool, 65536); 2423 ctx.sections = sections; 2424 ctx.section = section_debug; 2425 ctx.module = module; 2426 ctx.thunks = thunks; 2427 ctx.load_offset = load_offset; 2428 ctx.ref_offset = comp_unit_start - sections[section_debug].address; 2429 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache)); 2430 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt; 2431 ctx.cpp_name = NULL; 2432 2433 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset; 2434 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size; 2435 abbrev_ctx.word_size = cu_ctx.word_size; 2436 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool); 2437 2438 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128); 2439 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di); 2440 2441 if (di->abbrev->tag == DW_TAG_compile_unit) 2442 { 2443 struct attribute name; 2444 struct vector* children; 2445 dwarf2_debug_info_t* child = NULL; 2446 unsigned int i; 2447 struct attribute stmt_list, low_pc; 2448 struct attribute comp_dir; 2449 2450 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name)) 2451 name.u.string = NULL; 2452 2453 /* get working directory of current compilation unit */ 2454 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir)) 2455 comp_dir.u.string = NULL; 2456 2457 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc)) 2458 low_pc.u.uvalue = 0; 2459 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue, 2460 source_new(module, comp_dir.u.string, name.u.string)); 2461 di->symt = &ctx.compiland->symt; 2462 children = dwarf2_get_di_children(&ctx, di); 2463 if (children) for (i = 0; i < vector_length(children); i++) 2464 { 2465 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2466 dwarf2_load_one_entry(&ctx, child); 2467 } 2468 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list)) 2469 { 2470 #if defined(__REACTOS__) && defined(__clang__) 2471 unsigned long stmt_list_val = stmt_list.u.uvalue; 2472 if (stmt_list_val > module->module.BaseOfImage) 2473 { 2474 /* FIXME: Clang is recording this as an address, not an offset */ 2475 stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva; 2476 } 2477 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val)) 2478 #else 2479 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue)) 2480 #endif 2481 module->module.LineNumbers = TRUE; 2482 } 2483 ret = TRUE; 2484 } 2485 else FIXME("Should have a compilation unit here\n"); 2486 pool_destroy(&ctx.pool); 2487 return ret; 2488 } 2489 2490 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start, 2491 unsigned long ip, dwarf2_traverse_context_t* lctx) 2492 { 2493 DWORD_PTR beg, end; 2494 const BYTE* ptr = start; 2495 DWORD len; 2496 2497 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size) 2498 { 2499 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size; 2500 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size; 2501 if (!beg && !end) break; 2502 len = dwarf2_get_u2(ptr); ptr += 2; 2503 2504 if (beg <= ip && ip < end) 2505 { 2506 lctx->data = ptr; 2507 lctx->end_data = ptr + len; 2508 lctx->word_size = modfmt->u.dwarf2_info->word_size; 2509 return TRUE; 2510 } 2511 ptr += len; 2512 } 2513 WARN("Couldn't find ip in location list\n"); 2514 return FALSE; 2515 } 2516 2517 static enum location_error loc_compute_frame(struct process* pcs, 2518 const struct module_format* modfmt, 2519 const struct symt_function* func, 2520 DWORD_PTR ip, struct location* frame) 2521 { 2522 struct symt** psym = NULL; 2523 struct location* pframe; 2524 dwarf2_traverse_context_t lctx; 2525 enum location_error err; 2526 unsigned int i; 2527 2528 for (i=0; i<vector_length(&func->vchildren); i++) 2529 { 2530 psym = vector_at(&func->vchildren, i); 2531 if ((*psym)->tag == SymTagCustom) 2532 { 2533 pframe = &((struct symt_hierarchy_point*)*psym)->loc; 2534 2535 /* First, recompute the frame information, if needed */ 2536 switch (pframe->kind) 2537 { 2538 case loc_regrel: 2539 case loc_register: 2540 *frame = *pframe; 2541 break; 2542 case loc_dwarf2_location_list: 2543 WARN("Searching loclist for %s\n", func->hash_elt.name); 2544 if (!dwarf2_lookup_loclist(modfmt, 2545 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset, 2546 ip, &lctx)) 2547 return loc_err_out_of_scope; 2548 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err; 2549 if (frame->kind >= loc_user) 2550 { 2551 WARN("Couldn't compute runtime frame location\n"); 2552 return loc_err_too_complex; 2553 } 2554 break; 2555 default: 2556 WARN("Unsupported frame kind %d\n", pframe->kind); 2557 return loc_err_internal; 2558 } 2559 return 0; 2560 } 2561 } 2562 WARN("Couldn't find Custom function point, whilst location list offset is searched\n"); 2563 return loc_err_internal; 2564 } 2565 2566 enum reg_rule 2567 { 2568 RULE_UNSET, /* not set at all */ 2569 RULE_UNDEFINED, /* undefined value */ 2570 RULE_SAME, /* same value as previous frame */ 2571 RULE_CFA_OFFSET, /* stored at cfa offset */ 2572 RULE_OTHER_REG, /* stored in other register */ 2573 RULE_EXPRESSION, /* address specified by expression */ 2574 RULE_VAL_EXPRESSION /* value specified by expression */ 2575 }; 2576 2577 /* make it large enough for all CPUs */ 2578 #define NB_FRAME_REGS 64 2579 #define MAX_SAVED_STATES 16 2580 2581 struct frame_state 2582 { 2583 ULONG_PTR cfa_offset; 2584 unsigned char cfa_reg; 2585 enum reg_rule cfa_rule; 2586 enum reg_rule rules[NB_FRAME_REGS]; 2587 ULONG_PTR regs[NB_FRAME_REGS]; 2588 }; 2589 2590 struct frame_info 2591 { 2592 ULONG_PTR ip; 2593 ULONG_PTR code_align; 2594 LONG_PTR data_align; 2595 unsigned char retaddr_reg; 2596 unsigned char fde_encoding; 2597 unsigned char lsda_encoding; 2598 unsigned char signal_frame; 2599 unsigned char aug_z_format; 2600 unsigned char state_sp; 2601 struct frame_state state; 2602 struct frame_state state_stack[MAX_SAVED_STATES]; 2603 }; 2604 2605 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding) 2606 { 2607 ULONG_PTR base; 2608 2609 if (encoding == DW_EH_PE_omit) return 0; 2610 2611 switch (encoding & 0xf0) 2612 { 2613 case DW_EH_PE_abs: 2614 base = 0; 2615 break; 2616 case DW_EH_PE_pcrel: 2617 base = (ULONG_PTR)ctx->data; 2618 break; 2619 default: 2620 FIXME("unsupported encoding %02x\n", encoding); 2621 return 0; 2622 } 2623 2624 switch (encoding & 0x0f) 2625 { 2626 case DW_EH_PE_native: 2627 return base + dwarf2_parse_addr(ctx); 2628 case DW_EH_PE_leb128: 2629 return base + dwarf2_leb128_as_unsigned(ctx); 2630 case DW_EH_PE_data2: 2631 return base + dwarf2_parse_u2(ctx); 2632 case DW_EH_PE_data4: 2633 return base + dwarf2_parse_u4(ctx); 2634 case DW_EH_PE_data8: 2635 return base + dwarf2_parse_u8(ctx); 2636 case DW_EH_PE_signed|DW_EH_PE_leb128: 2637 return base + dwarf2_leb128_as_signed(ctx); 2638 case DW_EH_PE_signed|DW_EH_PE_data2: 2639 return base + (signed short)dwarf2_parse_u2(ctx); 2640 case DW_EH_PE_signed|DW_EH_PE_data4: 2641 return base + (signed int)dwarf2_parse_u4(ctx); 2642 case DW_EH_PE_signed|DW_EH_PE_data8: 2643 return base + (LONG64)dwarf2_parse_u8(ctx); 2644 default: 2645 FIXME("unsupported encoding %02x\n", encoding); 2646 return 0; 2647 } 2648 } 2649 2650 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info) 2651 { 2652 unsigned char version; 2653 const char* augmentation; 2654 const unsigned char* end; 2655 ULONG_PTR len; 2656 2657 memset(info, 0, sizeof(*info)); 2658 info->lsda_encoding = DW_EH_PE_omit; 2659 info->aug_z_format = 0; 2660 2661 /* parse the CIE first */ 2662 version = dwarf2_parse_byte(ctx); 2663 if (version != 1 && version != 3 && version != 4) 2664 { 2665 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1); 2666 return FALSE; 2667 } 2668 augmentation = (const char*)ctx->data; 2669 ctx->data += strlen(augmentation) + 1; 2670 2671 switch (version) 2672 { 2673 case 4: 2674 /* skip 'address_size' and 'segment_size' */ 2675 ctx->data += 2; 2676 /* fallthrough */ 2677 case 1: 2678 case 3: 2679 info->code_align = dwarf2_leb128_as_unsigned(ctx); 2680 info->data_align = dwarf2_leb128_as_signed(ctx); 2681 info->retaddr_reg = version == 1 ? dwarf2_parse_byte(ctx) :dwarf2_leb128_as_unsigned(ctx); 2682 break; 2683 default: 2684 ; 2685 } 2686 info->state.cfa_rule = RULE_CFA_OFFSET; 2687 2688 end = NULL; 2689 TRACE("\tparsing augmentation %s\n", augmentation); 2690 if (*augmentation) do 2691 { 2692 switch (*augmentation) 2693 { 2694 case 'z': 2695 len = dwarf2_leb128_as_unsigned(ctx); 2696 end = ctx->data + len; 2697 info->aug_z_format = 1; 2698 continue; 2699 case 'L': 2700 info->lsda_encoding = dwarf2_parse_byte(ctx); 2701 continue; 2702 case 'P': 2703 { 2704 unsigned char encoding = dwarf2_parse_byte(ctx); 2705 /* throw away the indirect bit, as we don't care for the result */ 2706 encoding &= ~DW_EH_PE_indirect; 2707 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */ 2708 continue; 2709 } 2710 case 'R': 2711 info->fde_encoding = dwarf2_parse_byte(ctx); 2712 continue; 2713 case 'S': 2714 info->signal_frame = 1; 2715 continue; 2716 } 2717 FIXME("unknown augmentation '%c'\n", *augmentation); 2718 if (!end) return FALSE; 2719 break; 2720 } while (*++augmentation); 2721 if (end) ctx->data = end; 2722 return TRUE; 2723 } 2724 2725 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta, 2726 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx, 2727 struct frame_info* info, BOOL in_eh_frame) 2728 { 2729 const unsigned char* ptr_blk; 2730 const unsigned char* cie_ptr; 2731 const unsigned char* last_cie_ptr = (const unsigned char*)~0; 2732 unsigned len, id; 2733 unsigned long start, range; 2734 unsigned cie_id; 2735 const BYTE* start_data = fde_ctx->data; 2736 2737 cie_id = in_eh_frame ? 0 : DW_CIE_ID; 2738 /* skip 0-padding at beginning of section (alignment) */ 2739 while (fde_ctx->data + 2 * 4 < fde_ctx->end_data) 2740 { 2741 if (dwarf2_parse_u4(fde_ctx)) 2742 { 2743 fde_ctx->data -= 4; 2744 break; 2745 } 2746 } 2747 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk) 2748 { 2749 /* find the FDE for address addr (skip CIE) */ 2750 len = dwarf2_parse_u4(fde_ctx); 2751 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n"); 2752 ptr_blk = fde_ctx->data + len; 2753 id = dwarf2_parse_u4(fde_ctx); 2754 if (id == cie_id) 2755 { 2756 last_cie_ptr = fde_ctx->data - 8; 2757 /* we need some bits out of the CIE in order to parse all contents */ 2758 if (!parse_cie_details(fde_ctx, info)) return FALSE; 2759 cie_ctx->data = fde_ctx->data; 2760 cie_ctx->end_data = ptr_blk; 2761 cie_ctx->word_size = fde_ctx->word_size; 2762 continue; 2763 } 2764 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id; 2765 if (cie_ptr != last_cie_ptr) 2766 { 2767 last_cie_ptr = cie_ptr; 2768 cie_ctx->data = cie_ptr; 2769 cie_ctx->word_size = fde_ctx->word_size; 2770 cie_ctx->end_data = cie_ptr + 4; 2771 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx); 2772 if (dwarf2_parse_u4(cie_ctx) != cie_id) 2773 { 2774 FIXME("wrong CIE pointer at %x from FDE %x\n", 2775 (unsigned)(cie_ptr - start_data), 2776 (unsigned)(fde_ctx->data - start_data)); 2777 return FALSE; 2778 } 2779 if (!parse_cie_details(cie_ctx, info)) return FALSE; 2780 } 2781 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding); 2782 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F); 2783 2784 if (addr >= start && addr < start + range) 2785 { 2786 /* reset the FDE context */ 2787 fde_ctx->end_data = ptr_blk; 2788 2789 info->ip = start; 2790 return TRUE; 2791 } 2792 } 2793 return FALSE; 2794 } 2795 2796 static int valid_reg(ULONG_PTR reg) 2797 { 2798 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg); 2799 return (reg < NB_FRAME_REGS); 2800 } 2801 2802 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx, 2803 ULONG_PTR last_ip, struct frame_info *info) 2804 { 2805 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame) 2806 { 2807 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx); 2808 2809 if (op & 0xc0) 2810 { 2811 switch (op & 0xc0) 2812 { 2813 case DW_CFA_advance_loc: 2814 { 2815 ULONG_PTR offset = (op & 0x3f) * info->code_align; 2816 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset); 2817 info->ip += offset; 2818 break; 2819 } 2820 case DW_CFA_offset: 2821 { 2822 ULONG_PTR reg = op & 0x3f; 2823 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align; 2824 if (!valid_reg(reg)) break; 2825 TRACE("%lx: DW_CFA_offset %s, %ld\n", 2826 info->ip, 2827 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2828 offset); 2829 info->state.regs[reg] = offset; 2830 info->state.rules[reg] = RULE_CFA_OFFSET; 2831 break; 2832 } 2833 case DW_CFA_restore: 2834 { 2835 ULONG_PTR reg = op & 0x3f; 2836 if (!valid_reg(reg)) break; 2837 TRACE("%lx: DW_CFA_restore %s\n", 2838 info->ip, 2839 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2840 info->state.rules[reg] = RULE_UNSET; 2841 break; 2842 } 2843 } 2844 } 2845 else switch (op) 2846 { 2847 case DW_CFA_nop: 2848 break; 2849 case DW_CFA_set_loc: 2850 { 2851 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding); 2852 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc); 2853 info->ip = loc; 2854 break; 2855 } 2856 case DW_CFA_advance_loc1: 2857 { 2858 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align; 2859 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset); 2860 info->ip += offset; 2861 break; 2862 } 2863 case DW_CFA_advance_loc2: 2864 { 2865 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align; 2866 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset); 2867 info->ip += offset; 2868 break; 2869 } 2870 case DW_CFA_advance_loc4: 2871 { 2872 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align; 2873 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset); 2874 info->ip += offset; 2875 break; 2876 } 2877 case DW_CFA_offset_extended: 2878 case DW_CFA_offset_extended_sf: 2879 { 2880 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2881 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align 2882 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2883 if (!valid_reg(reg)) break; 2884 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n", 2885 info->ip, 2886 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2887 offset); 2888 info->state.regs[reg] = offset; 2889 info->state.rules[reg] = RULE_CFA_OFFSET; 2890 break; 2891 } 2892 case DW_CFA_restore_extended: 2893 { 2894 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2895 if (!valid_reg(reg)) break; 2896 TRACE("%lx: DW_CFA_restore_extended %s\n", 2897 info->ip, 2898 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2899 info->state.rules[reg] = RULE_UNSET; 2900 break; 2901 } 2902 case DW_CFA_undefined: 2903 { 2904 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2905 if (!valid_reg(reg)) break; 2906 TRACE("%lx: DW_CFA_undefined %s\n", 2907 info->ip, 2908 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2909 info->state.rules[reg] = RULE_UNDEFINED; 2910 break; 2911 } 2912 case DW_CFA_same_value: 2913 { 2914 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2915 if (!valid_reg(reg)) break; 2916 TRACE("%lx: DW_CFA_same_value %s\n", 2917 info->ip, 2918 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2919 info->state.regs[reg] = reg; 2920 info->state.rules[reg] = RULE_SAME; 2921 break; 2922 } 2923 case DW_CFA_register: 2924 { 2925 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2926 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx); 2927 if (!valid_reg(reg) || !valid_reg(reg2)) break; 2928 TRACE("%lx: DW_CFA_register %s == %s\n", 2929 info->ip, 2930 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2931 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, TRUE))); 2932 info->state.regs[reg] = reg2; 2933 info->state.rules[reg] = RULE_OTHER_REG; 2934 break; 2935 } 2936 case DW_CFA_remember_state: 2937 TRACE("%lx: DW_CFA_remember_state\n", info->ip); 2938 if (info->state_sp >= MAX_SAVED_STATES) 2939 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip); 2940 else 2941 info->state_stack[info->state_sp++] = info->state; 2942 break; 2943 case DW_CFA_restore_state: 2944 TRACE("%lx: DW_CFA_restore_state\n", info->ip); 2945 if (!info->state_sp) 2946 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip); 2947 else 2948 info->state = info->state_stack[--info->state_sp]; 2949 break; 2950 case DW_CFA_def_cfa: 2951 case DW_CFA_def_cfa_sf: 2952 { 2953 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2954 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx) 2955 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2956 if (!valid_reg(reg)) break; 2957 TRACE("%lx: DW_CFA_def_cfa %s, %ld\n", 2958 info->ip, 2959 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2960 offset); 2961 info->state.cfa_reg = reg; 2962 info->state.cfa_offset = offset; 2963 info->state.cfa_rule = RULE_CFA_OFFSET; 2964 break; 2965 } 2966 case DW_CFA_def_cfa_register: 2967 { 2968 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2969 if (!valid_reg(reg)) break; 2970 TRACE("%lx: DW_CFA_def_cfa_register %s\n", 2971 info->ip, 2972 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2973 info->state.cfa_reg = reg; 2974 info->state.cfa_rule = RULE_CFA_OFFSET; 2975 break; 2976 } 2977 case DW_CFA_def_cfa_offset: 2978 case DW_CFA_def_cfa_offset_sf: 2979 { 2980 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx) 2981 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2982 TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset); 2983 info->state.cfa_offset = offset; 2984 info->state.cfa_rule = RULE_CFA_OFFSET; 2985 break; 2986 } 2987 case DW_CFA_def_cfa_expression: 2988 { 2989 ULONG_PTR expr = (ULONG_PTR)ctx->data; 2990 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx); 2991 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len); 2992 info->state.cfa_offset = expr; 2993 info->state.cfa_rule = RULE_VAL_EXPRESSION; 2994 ctx->data += len; 2995 break; 2996 } 2997 case DW_CFA_expression: 2998 case DW_CFA_val_expression: 2999 { 3000 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 3001 ULONG_PTR expr = (ULONG_PTR)ctx->data; 3002 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx); 3003 if (!valid_reg(reg)) break; 3004 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n", 3005 info->ip, (op == DW_CFA_expression) ? "" : "val_", 3006 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 3007 expr, expr + len); 3008 info->state.regs[reg] = expr; 3009 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION; 3010 ctx->data += len; 3011 break; 3012 } 3013 case DW_CFA_GNU_args_size: 3014 /* FIXME: should check that GCC is the compiler for this CU */ 3015 { 3016 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx); 3017 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args); 3018 /* ignored */ 3019 break; 3020 } 3021 default: 3022 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op); 3023 break; 3024 } 3025 } 3026 } 3027 3028 /* retrieve a context register from its dwarf number */ 3029 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg) 3030 { 3031 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz; 3032 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz); 3033 3034 if (sz != sizeof(ULONG_PTR)) 3035 { 3036 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz); 3037 return 0; 3038 } 3039 return *ptr; 3040 } 3041 3042 /* set a context register from its dwarf number */ 3043 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg, 3044 ULONG_PTR val, BOOL isdebuggee) 3045 { 3046 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz; 3047 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz); 3048 3049 if (isdebuggee) 3050 { 3051 char tmp[16]; 3052 3053 if (sz > sizeof(tmp)) 3054 { 3055 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz); 3056 return; 3057 } 3058 if (!sw_read_mem(csw, val, tmp, sz)) 3059 { 3060 WARN("Couldn't read memory at %p\n", (void*)val); 3061 return; 3062 } 3063 memcpy(ptr, tmp, sz); 3064 } 3065 else 3066 { 3067 if (sz != sizeof(ULONG_PTR)) 3068 { 3069 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz); 3070 return; 3071 } 3072 *ptr = val; 3073 } 3074 } 3075 3076 /* copy a register from one context to another using dwarf number */ 3077 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc) 3078 { 3079 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst, TRUE), szdst; 3080 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc, TRUE), szsrc; 3081 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst); 3082 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc); 3083 3084 if (szdst != szsrc) 3085 { 3086 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n", 3087 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst); 3088 return; 3089 } 3090 memcpy(ptrdst, ptrsrc, szdst); 3091 } 3092 3093 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw, 3094 const unsigned char* zp, CONTEXT *context) 3095 { 3096 dwarf2_traverse_context_t ctx; 3097 ULONG_PTR reg, sz, tmp, stack[64]; 3098 int sp = -1; 3099 ULONG_PTR len; 3100 3101 ctx.data = zp; 3102 ctx.end_data = zp + 4; 3103 len = dwarf2_leb128_as_unsigned(&ctx); 3104 ctx.end_data = ctx.data + len; 3105 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 3106 3107 while (ctx.data < ctx.end_data) 3108 { 3109 unsigned char opcode = dwarf2_parse_byte(&ctx); 3110 3111 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31) 3112 stack[++sp] = opcode - DW_OP_lit0; 3113 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31) 3114 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0); 3115 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31) 3116 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx); 3117 else switch (opcode) 3118 { 3119 case DW_OP_nop: break; 3120 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break; 3121 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break; 3122 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break; 3123 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break; 3124 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break; 3125 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break; 3126 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break; 3127 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break; 3128 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break; 3129 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break; 3130 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break; 3131 case DW_OP_deref: 3132 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp))) 3133 { 3134 ERR("Couldn't read memory at %lx\n", stack[sp]); 3135 tmp = 0; 3136 } 3137 stack[sp] = tmp; 3138 break; 3139 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break; 3140 case DW_OP_drop: sp--; break; 3141 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break; 3142 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break; 3143 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break; 3144 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break; 3145 case DW_OP_abs: stack[sp] = labs(stack[sp]); break; 3146 case DW_OP_neg: stack[sp] = -stack[sp]; break; 3147 case DW_OP_not: stack[sp] = ~stack[sp]; break; 3148 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break; 3149 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break; 3150 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break; 3151 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break; 3152 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break; 3153 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break; 3154 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break; 3155 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break; 3156 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break; 3157 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break; 3158 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break; 3159 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break; 3160 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break; 3161 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break; 3162 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break; 3163 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break; 3164 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break; 3165 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break; 3166 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break; 3167 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break; 3168 case DW_OP_GNU_encoded_addr: 3169 tmp = dwarf2_parse_byte(&ctx); 3170 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp); 3171 break; 3172 case DW_OP_regx: 3173 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx)); 3174 break; 3175 case DW_OP_bregx: 3176 reg = dwarf2_leb128_as_unsigned(&ctx); 3177 tmp = dwarf2_leb128_as_signed(&ctx); 3178 stack[++sp] = get_context_reg(context, reg) + tmp; 3179 break; 3180 case DW_OP_deref_size: 3181 sz = dwarf2_parse_byte(&ctx); 3182 if (!sw_read_mem(csw, stack[sp], &tmp, sz)) 3183 { 3184 ERR("Couldn't read memory at %lx\n", stack[sp]); 3185 tmp = 0; 3186 } 3187 /* do integral promotion */ 3188 switch (sz) 3189 { 3190 case 1: stack[sp] = *(unsigned char*)&tmp; break; 3191 case 2: stack[sp] = *(unsigned short*)&tmp; break; 3192 case 4: stack[sp] = *(unsigned int*)&tmp; break; 3193 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */ 3194 default: FIXME("Unknown size for deref 0x%lx\n", sz); 3195 } 3196 break; 3197 default: 3198 FIXME("unhandled opcode %02x\n", opcode); 3199 } 3200 } 3201 return stack[sp]; 3202 } 3203 3204 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw, 3205 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa) 3206 { 3207 unsigned int i; 3208 ULONG_PTR value; 3209 CONTEXT new_context = *context; 3210 3211 switch (state->cfa_rule) 3212 { 3213 case RULE_EXPRESSION: 3214 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context); 3215 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa))) 3216 { 3217 WARN("Couldn't read memory at %p\n", (void*)*cfa); 3218 return; 3219 } 3220 break; 3221 case RULE_VAL_EXPRESSION: 3222 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context); 3223 break; 3224 default: 3225 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset; 3226 break; 3227 } 3228 if (!*cfa) return; 3229 3230 for (i = 0; i < NB_FRAME_REGS; i++) 3231 { 3232 switch (state->rules[i]) 3233 { 3234 case RULE_UNSET: 3235 case RULE_UNDEFINED: 3236 case RULE_SAME: 3237 break; 3238 case RULE_CFA_OFFSET: 3239 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE); 3240 break; 3241 case RULE_OTHER_REG: 3242 copy_context_reg(&new_context, i, context, state->regs[i]); 3243 break; 3244 case RULE_EXPRESSION: 3245 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context); 3246 set_context_reg(csw, &new_context, i, value, TRUE); 3247 break; 3248 case RULE_VAL_EXPRESSION: 3249 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context); 3250 set_context_reg(csw, &new_context, i, value, FALSE); 3251 break; 3252 } 3253 } 3254 *context = new_context; 3255 } 3256 3257 /*********************************************************************** 3258 * dwarf2_virtual_unwind 3259 * 3260 */ 3261 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa) 3262 { 3263 struct module_pair pair; 3264 struct frame_info info; 3265 dwarf2_traverse_context_t cie_ctx, fde_ctx; 3266 struct module_format* modfmt; 3267 const unsigned char* end; 3268 DWORD_PTR delta; 3269 3270 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) || 3271 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) || 3272 !module_get_debug(&pair)) 3273 return FALSE; 3274 modfmt = pair.effective->format_info[DFI_DWARF]; 3275 if (!modfmt) return FALSE; 3276 memset(&info, 0, sizeof(info)); 3277 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address; 3278 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size; 3279 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size; 3280 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map 3281 * in this process the IMAGE section at a different address as the one expected by 3282 * the image 3283 */ 3284 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva - 3285 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address; 3286 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE)) 3287 { 3288 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address; 3289 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size; 3290 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size; 3291 delta = pair.effective->reloc_delta; 3292 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE)) 3293 { 3294 TRACE("Couldn't find information for %lx\n", ip); 3295 return FALSE; 3296 } 3297 } 3298 3299 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n", 3300 ip, info.ip, info.code_align, info.data_align, 3301 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg, TRUE))); 3302 3303 /* if at very beginning of function, return and use default unwinder */ 3304 if (ip == info.ip) return FALSE; 3305 execute_cfa_instructions(&cie_ctx, ip, &info); 3306 3307 if (info.aug_z_format) /* get length of augmentation data */ 3308 { 3309 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx); 3310 end = fde_ctx.data + len; 3311 } 3312 else end = NULL; 3313 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */ 3314 if (end) fde_ctx.data = end; 3315 3316 execute_cfa_instructions(&fde_ctx, ip, &info); 3317 3318 /* if there is no information about retaddr, use default unwinder */ 3319 if (info.state.rules[info.retaddr_reg] == RULE_UNSET) return FALSE; 3320 3321 apply_frame_state(pair.effective, csw, context, &info.state, cfa); 3322 3323 return TRUE; 3324 } 3325 3326 static void dwarf2_location_compute(struct process* pcs, 3327 const struct module_format* modfmt, 3328 const struct symt_function* func, 3329 struct location* loc) 3330 { 3331 struct location frame; 3332 DWORD_PTR ip; 3333 int err; 3334 dwarf2_traverse_context_t lctx; 3335 3336 if (!func->container || func->container->tag != SymTagCompiland) 3337 { 3338 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name); 3339 err = loc_err_internal; 3340 } 3341 else 3342 { 3343 /* instruction pointer relative to compiland's start */ 3344 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address; 3345 3346 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0) 3347 { 3348 switch (loc->kind) 3349 { 3350 case loc_dwarf2_location_list: 3351 /* Then, if the variable has a location list, find it !! */ 3352 if (dwarf2_lookup_loclist(modfmt, 3353 modfmt->u.dwarf2_info->debug_loc.address + loc->offset, 3354 ip, &lctx)) 3355 goto do_compute; 3356 err = loc_err_out_of_scope; 3357 break; 3358 case loc_dwarf2_block: 3359 /* or if we have a copy of an existing block, get ready for it */ 3360 { 3361 unsigned* ptr = (unsigned*)loc->offset; 3362 3363 lctx.data = (const BYTE*)(ptr + 1); 3364 lctx.end_data = lctx.data + *ptr; 3365 lctx.word_size = modfmt->u.dwarf2_info->word_size; 3366 } 3367 do_compute: 3368 /* now get the variable */ 3369 err = compute_location(&lctx, loc, pcs->handle, &frame); 3370 break; 3371 case loc_register: 3372 case loc_regrel: 3373 /* nothing to do */ 3374 break; 3375 default: 3376 WARN("Unsupported local kind %d\n", loc->kind); 3377 err = loc_err_internal; 3378 } 3379 } 3380 } 3381 if (err < 0) 3382 { 3383 loc->kind = loc_register; 3384 loc->reg = err; 3385 } 3386 } 3387 3388 #ifdef HAVE_ZLIB 3389 static void *zalloc(void *priv, uInt items, uInt sz) 3390 { 3391 return HeapAlloc(GetProcessHeap(), 0, items * sz); 3392 } 3393 3394 static void zfree(void *priv, void *addr) 3395 { 3396 HeapFree(GetProcessHeap(), 0, addr); 3397 } 3398 3399 static inline BOOL dwarf2_init_zsection(dwarf2_section_t* section, 3400 const char* zsectname, 3401 struct image_section_map* ism) 3402 { 3403 z_stream z; 3404 LARGE_INTEGER li; 3405 int res; 3406 BOOL ret = FALSE; 3407 3408 BYTE *addr, *sect = (BYTE *)image_map_section(ism); 3409 size_t sz = image_get_map_size(ism); 3410 3411 if (sz <= 12 || memcmp(sect, "ZLIB", 4)) 3412 { 3413 ERR("invalid compressed section %s\n", zsectname); 3414 goto out; 3415 } 3416 3417 #ifdef WORDS_BIGENDIAN 3418 li.u.HighPart = *(DWORD*)§[4]; 3419 li.u.LowPart = *(DWORD*)§[8]; 3420 #else 3421 li.u.HighPart = RtlUlongByteSwap(*(DWORD*)§[4]); 3422 li.u.LowPart = RtlUlongByteSwap(*(DWORD*)§[8]); 3423 #endif 3424 3425 addr = HeapAlloc(GetProcessHeap(), 0, li.QuadPart); 3426 if (!addr) 3427 goto out; 3428 3429 z.next_in = §[12]; 3430 z.avail_in = sz - 12; 3431 z.opaque = NULL; 3432 z.zalloc = zalloc; 3433 z.zfree = zfree; 3434 3435 res = inflateInit(&z); 3436 if (res != Z_OK) 3437 { 3438 FIXME("inflateInit failed with %i / %s\n", res, z.msg); 3439 goto out_free; 3440 } 3441 3442 do { 3443 z.next_out = addr + z.total_out; 3444 z.avail_out = li.QuadPart - z.total_out; 3445 res = inflate(&z, Z_FINISH); 3446 } while (z.avail_in && res == Z_STREAM_END); 3447 3448 if (res != Z_STREAM_END) 3449 { 3450 FIXME("Decompression failed with %i / %s\n", res, z.msg); 3451 goto out_end; 3452 } 3453 3454 ret = TRUE; 3455 section->compressed = TRUE; 3456 section->address = addr; 3457 section->rva = image_get_map_rva(ism); 3458 section->size = z.total_out; 3459 3460 out_end: 3461 inflateEnd(&z); 3462 out_free: 3463 if (!ret) 3464 HeapFree(GetProcessHeap(), 0, addr); 3465 out: 3466 image_unmap_section(ism); 3467 return ret; 3468 } 3469 3470 #endif 3471 3472 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap, 3473 const char* sectname, const char* zsectname, 3474 struct image_section_map* ism) 3475 { 3476 struct image_section_map local_ism; 3477 3478 if (!ism) ism = &local_ism; 3479 3480 section->compressed = FALSE; 3481 if (image_find_section(fmap, sectname, ism)) 3482 { 3483 section->address = (const BYTE*)image_map_section(ism); 3484 section->size = image_get_map_size(ism); 3485 section->rva = image_get_map_rva(ism); 3486 return TRUE; 3487 } 3488 3489 section->address = NULL; 3490 section->size = 0; 3491 section->rva = 0; 3492 3493 if (zsectname && image_find_section(fmap, zsectname, ism)) 3494 { 3495 #ifdef HAVE_ZLIB 3496 return dwarf2_init_zsection(section, zsectname, ism); 3497 #else 3498 FIXME("dbghelp not built with zlib, but compressed section found\n" ); 3499 #endif 3500 } 3501 3502 return FALSE; 3503 } 3504 3505 static inline void dwarf2_fini_section(dwarf2_section_t* section) 3506 { 3507 if (section->compressed) 3508 HeapFree(GetProcessHeap(), 0, (void*)section->address); 3509 } 3510 3511 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt) 3512 { 3513 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_loc); 3514 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_frame); 3515 HeapFree(GetProcessHeap(), 0, modfmt); 3516 } 3517 3518 BOOL dwarf2_parse(struct module* module, unsigned long load_offset, 3519 const struct elf_thunk_area* thunks, 3520 struct image_file_map* fmap) 3521 { 3522 dwarf2_section_t eh_frame, section[section_max]; 3523 dwarf2_traverse_context_t mod_ctx; 3524 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect, 3525 debug_line_sect, debug_ranges_sect, eh_frame_sect; 3526 BOOL ret = TRUE; 3527 struct module_format* dwarf2_modfmt; 3528 3529 dwarf2_init_section(&eh_frame, fmap, ".eh_frame", NULL, &eh_frame_sect); 3530 dwarf2_init_section(§ion[section_debug], fmap, ".debug_info", ".zdebug_info", &debug_sect); 3531 dwarf2_init_section(§ion[section_abbrev], fmap, ".debug_abbrev", ".zdebug_abbrev", &debug_abbrev_sect); 3532 dwarf2_init_section(§ion[section_string], fmap, ".debug_str", ".zdebug_str", &debug_str_sect); 3533 dwarf2_init_section(§ion[section_line], fmap, ".debug_line", ".zdebug_line", &debug_line_sect); 3534 dwarf2_init_section(§ion[section_ranges], fmap, ".debug_ranges", ".zdebug_ranges", &debug_ranges_sect); 3535 3536 /* to do anything useful we need either .eh_frame or .debug_info */ 3537 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) && 3538 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP)) 3539 { 3540 ret = FALSE; 3541 goto leave; 3542 } 3543 3544 if (fmap->modtype == DMT_ELF && debug_sect.fmap) 3545 { 3546 /* debug info might have a different base address than .so file 3547 * when elf file is prelinked after splitting off debug info 3548 * adjust symbol base addresses accordingly 3549 */ 3550 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start; 3551 } 3552 3553 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName)); 3554 3555 mod_ctx.data = section[section_debug].address; 3556 mod_ctx.end_data = mod_ctx.data + section[section_debug].size; 3557 mod_ctx.word_size = 0; /* will be correctly set later on */ 3558 3559 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0, 3560 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info)); 3561 if (!dwarf2_modfmt) 3562 { 3563 ret = FALSE; 3564 goto leave; 3565 } 3566 dwarf2_modfmt->module = module; 3567 dwarf2_modfmt->remove = dwarf2_module_remove; 3568 dwarf2_modfmt->loc_compute = dwarf2_location_compute; 3569 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1); 3570 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */ 3571 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt; 3572 3573 /* As we'll need later some sections' content, we won't unmap these 3574 * sections upon existing this function 3575 */ 3576 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", ".zdebug_loc", NULL); 3577 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", ".zdebug_frame", NULL); 3578 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame; 3579 3580 while (mod_ctx.data < mod_ctx.end_data) 3581 { 3582 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset); 3583 } 3584 dwarf2_modfmt->module->module.SymType = SymDia; 3585 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24); 3586 /* FIXME: we could have a finer grain here */ 3587 dwarf2_modfmt->module->module.GlobalSymbols = TRUE; 3588 dwarf2_modfmt->module->module.TypeInfo = TRUE; 3589 dwarf2_modfmt->module->module.SourceIndexed = TRUE; 3590 dwarf2_modfmt->module->module.Publics = TRUE; 3591 3592 /* set the word_size for eh_frame parsing */ 3593 dwarf2_modfmt->u.dwarf2_info->word_size = fmap->addr_size / 8; 3594 3595 leave: 3596 dwarf2_fini_section(§ion[section_debug]); 3597 dwarf2_fini_section(§ion[section_abbrev]); 3598 dwarf2_fini_section(§ion[section_string]); 3599 dwarf2_fini_section(§ion[section_line]); 3600 dwarf2_fini_section(§ion[section_ranges]); 3601 3602 image_unmap_section(&debug_sect); 3603 image_unmap_section(&debug_abbrev_sect); 3604 image_unmap_section(&debug_str_sect); 3605 image_unmap_section(&debug_line_sect); 3606 image_unmap_section(&debug_ranges_sect); 3607 if (!ret) image_unmap_section(&eh_frame_sect); 3608 3609 return ret; 3610 } 3611