1 /* 2 * File dwarf.c - read dwarf2 information from the ELF modules 3 * 4 * Copyright (C) 2005, Raphael Junqueira 5 * Copyright (C) 2006-2011, Eric Pouech 6 * Copyright (C) 2010, Alexandre Julliard 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with this library; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 21 */ 22 23 #ifndef DBGHELP_STATIC_LIB 24 25 #define NONAMELESSUNION 26 27 #include "config.h" 28 29 #include <sys/types.h> 30 #include <fcntl.h> 31 #ifdef HAVE_SYS_STAT_H 32 # include <sys/stat.h> 33 #endif 34 #ifdef HAVE_SYS_MMAN_H 35 #include <sys/mman.h> 36 #endif 37 #include <limits.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #ifdef HAVE_UNISTD_H 41 # include <unistd.h> 42 #endif 43 #include <stdio.h> 44 #include <assert.h> 45 #include <stdarg.h> 46 47 #ifdef HAVE_ZLIB 48 #include <zlib.h> 49 #endif 50 51 #include "windef.h" 52 #include "winternl.h" 53 #include "winbase.h" 54 #include "winuser.h" 55 #include "ole2.h" 56 #include "oleauto.h" 57 58 #include "dbghelp_private.h" 59 #include "image_private.h" 60 61 #include "wine/debug.h" 62 63 #else 64 #include "dbghelp_private.h" 65 #include "image_private.h" 66 #endif /* !DBGHELP_STATIC_LIB */ 67 68 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf); 69 70 /* FIXME: 71 * - Functions: 72 * o unspecified parameters 73 * o inlined functions 74 * o Debug{Start|End}Point 75 * o CFA 76 * - Udt 77 * o proper types loading (nesting) 78 */ 79 80 #if 0 81 static void dump(const void* ptr, unsigned len) 82 { 83 int i, j; 84 BYTE msg[128]; 85 static const char hexof[] = "0123456789abcdef"; 86 const BYTE* x = ptr; 87 88 for (i = 0; i < len; i += 16) 89 { 90 sprintf(msg, "%08x: ", i); 91 memset(msg + 10, ' ', 3 * 16 + 1 + 16); 92 for (j = 0; j < min(16, len - i); j++) 93 { 94 msg[10 + 3 * j + 0] = hexof[x[i + j] >> 4]; 95 msg[10 + 3 * j + 1] = hexof[x[i + j] & 15]; 96 msg[10 + 3 * j + 2] = ' '; 97 msg[10 + 3 * 16 + 1 + j] = (x[i + j] >= 0x20 && x[i + j] < 0x7f) ? 98 x[i + j] : '.'; 99 } 100 msg[10 + 3 * 16] = ' '; 101 msg[10 + 3 * 16 + 1 + 16] = '\0'; 102 TRACE("%s\n", msg); 103 } 104 } 105 #endif 106 107 /** 108 * 109 * Main Specs: 110 * http://www.eagercon.com/dwarf/dwarf3std.htm 111 * http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf 112 * 113 * dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html 114 * 115 * example of projects who do dwarf2 parsing: 116 * http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2 117 * http://elis.ugent.be/diota/log/ltrace_elf.c 118 */ 119 #include "dwarf.h" 120 121 /** 122 * Parsers 123 */ 124 125 typedef struct dwarf2_abbrev_entry_attr_s 126 { 127 unsigned long attribute; 128 unsigned long form; 129 struct dwarf2_abbrev_entry_attr_s* next; 130 } dwarf2_abbrev_entry_attr_t; 131 132 typedef struct dwarf2_abbrev_entry_s 133 { 134 unsigned long entry_code; 135 unsigned long tag; 136 unsigned char have_child; 137 unsigned num_attr; 138 dwarf2_abbrev_entry_attr_t* attrs; 139 } dwarf2_abbrev_entry_t; 140 141 struct dwarf2_block 142 { 143 unsigned size; 144 const unsigned char* ptr; 145 }; 146 147 struct attribute 148 { 149 unsigned long form; 150 enum {attr_direct, attr_abstract_origin, attr_specification} gotten_from; 151 union 152 { 153 unsigned long uvalue; 154 ULONGLONG lluvalue; 155 long svalue; 156 const char* string; 157 struct dwarf2_block block; 158 } u; 159 }; 160 161 typedef struct dwarf2_debug_info_s 162 { 163 const dwarf2_abbrev_entry_t*abbrev; 164 struct symt* symt; 165 const unsigned char** data; 166 struct vector children; 167 struct dwarf2_debug_info_s* parent; 168 } dwarf2_debug_info_t; 169 170 typedef struct dwarf2_section_s 171 { 172 BOOL compressed; 173 const unsigned char* address; 174 unsigned size; 175 DWORD_PTR rva; 176 } dwarf2_section_t; 177 178 enum dwarf2_sections {section_debug, section_string, section_abbrev, section_line, section_ranges, section_max}; 179 180 typedef struct dwarf2_traverse_context_s 181 { 182 const unsigned char* data; 183 const unsigned char* end_data; 184 unsigned char word_size; 185 } dwarf2_traverse_context_t; 186 187 /* symt_cache indexes */ 188 #define sc_void 0 189 #define sc_int1 1 190 #define sc_int2 2 191 #define sc_int4 3 192 #define sc_num 4 193 194 typedef struct dwarf2_parse_context_s 195 { 196 const dwarf2_section_t* sections; 197 unsigned section; 198 struct pool pool; 199 struct module* module; 200 struct symt_compiland* compiland; 201 const struct elf_thunk_area*thunks; 202 struct sparse_array abbrev_table; 203 struct sparse_array debug_info_table; 204 unsigned long load_offset; 205 unsigned long ref_offset; 206 struct symt* symt_cache[sc_num]; /* void, int1, int2, int4 */ 207 char* cpp_name; 208 } dwarf2_parse_context_t; 209 210 /* stored in the dbghelp's module internal structure for later reuse */ 211 struct dwarf2_module_info_s 212 { 213 dwarf2_section_t debug_loc; 214 dwarf2_section_t debug_frame; 215 dwarf2_section_t eh_frame; 216 unsigned char word_size; 217 }; 218 219 #define loc_dwarf2_location_list (loc_user + 0) 220 #define loc_dwarf2_block (loc_user + 1) 221 222 /* forward declarations */ 223 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* entry); 224 225 static unsigned char dwarf2_get_byte(const unsigned char* ptr) 226 { 227 return *ptr; 228 } 229 230 static unsigned char dwarf2_parse_byte(dwarf2_traverse_context_t* ctx) 231 { 232 unsigned char uvalue = dwarf2_get_byte(ctx->data); 233 ctx->data += 1; 234 return uvalue; 235 } 236 237 static unsigned short dwarf2_get_u2(const unsigned char* ptr) 238 { 239 return *(const UINT16*)ptr; 240 } 241 242 static unsigned short dwarf2_parse_u2(dwarf2_traverse_context_t* ctx) 243 { 244 unsigned short uvalue = dwarf2_get_u2(ctx->data); 245 ctx->data += 2; 246 return uvalue; 247 } 248 249 static unsigned long dwarf2_get_u4(const unsigned char* ptr) 250 { 251 return *(const UINT32*)ptr; 252 } 253 254 static unsigned long dwarf2_parse_u4(dwarf2_traverse_context_t* ctx) 255 { 256 unsigned long uvalue = dwarf2_get_u4(ctx->data); 257 ctx->data += 4; 258 return uvalue; 259 } 260 261 static DWORD64 dwarf2_get_u8(const unsigned char* ptr) 262 { 263 return *(const UINT64*)ptr; 264 } 265 266 static DWORD64 dwarf2_parse_u8(dwarf2_traverse_context_t* ctx) 267 { 268 DWORD64 uvalue = dwarf2_get_u8(ctx->data); 269 ctx->data += 8; 270 return uvalue; 271 } 272 273 static unsigned long dwarf2_get_leb128_as_unsigned(const unsigned char* ptr, const unsigned char** end) 274 { 275 unsigned long ret = 0; 276 unsigned char byte; 277 unsigned shift = 0; 278 279 do 280 { 281 byte = dwarf2_get_byte(ptr++); 282 ret |= (byte & 0x7f) << shift; 283 shift += 7; 284 } while (byte & 0x80); 285 286 if (end) *end = ptr; 287 return ret; 288 } 289 290 static unsigned long dwarf2_leb128_as_unsigned(dwarf2_traverse_context_t* ctx) 291 { 292 unsigned long ret; 293 294 assert(ctx); 295 296 ret = dwarf2_get_leb128_as_unsigned(ctx->data, &ctx->data); 297 298 return ret; 299 } 300 301 static long dwarf2_get_leb128_as_signed(const unsigned char* ptr, const unsigned char** end) 302 { 303 long ret = 0; 304 unsigned char byte; 305 unsigned shift = 0; 306 const unsigned size = sizeof(int) * 8; 307 308 do 309 { 310 byte = dwarf2_get_byte(ptr++); 311 ret |= (byte & 0x7f) << shift; 312 shift += 7; 313 } while (byte & 0x80); 314 if (end) *end = ptr; 315 316 /* as spec: sign bit of byte is 2nd high order bit (80x40) 317 * -> 0x80 is used as flag. 318 */ 319 if ((shift < size) && (byte & 0x40)) 320 { 321 ret |= - (1 << shift); 322 } 323 return ret; 324 } 325 326 static long dwarf2_leb128_as_signed(dwarf2_traverse_context_t* ctx) 327 { 328 long ret = 0; 329 330 assert(ctx); 331 332 ret = dwarf2_get_leb128_as_signed(ctx->data, &ctx->data); 333 return ret; 334 } 335 336 static unsigned dwarf2_leb128_length(const dwarf2_traverse_context_t* ctx) 337 { 338 unsigned ret; 339 for (ret = 0; ctx->data[ret] & 0x80; ret++); 340 return ret + 1; 341 } 342 343 /****************************************************************** 344 * dwarf2_get_addr 345 * 346 * Returns an address. 347 * We assume that in all cases word size from Dwarf matches the size of 348 * addresses in platform where the exec is compiled. 349 */ 350 static unsigned long dwarf2_get_addr(const unsigned char* ptr, unsigned word_size) 351 { 352 unsigned long ret; 353 354 switch (word_size) 355 { 356 case 4: 357 ret = dwarf2_get_u4(ptr); 358 break; 359 case 8: 360 ret = dwarf2_get_u8(ptr); 361 break; 362 default: 363 FIXME("Unsupported Word Size %u\n", word_size); 364 ret = 0; 365 } 366 return ret; 367 } 368 369 static unsigned long dwarf2_parse_addr(dwarf2_traverse_context_t* ctx) 370 { 371 unsigned long ret = dwarf2_get_addr(ctx->data, ctx->word_size); 372 ctx->data += ctx->word_size; 373 return ret; 374 } 375 376 static const char* dwarf2_debug_traverse_ctx(const dwarf2_traverse_context_t* ctx) 377 { 378 return wine_dbg_sprintf("ctx(%p)", ctx->data); 379 } 380 381 static const char* dwarf2_debug_ctx(const dwarf2_parse_context_t* ctx) 382 { 383 return wine_dbg_sprintf("ctx(%p,%s)", 384 ctx, debugstr_w(ctx->module->module.ModuleName)); 385 } 386 387 static const char* dwarf2_debug_di(const dwarf2_debug_info_t* di) 388 { 389 return wine_dbg_sprintf("debug_info(abbrev:%p,symt:%p)", 390 di->abbrev, di->symt); 391 } 392 393 static dwarf2_abbrev_entry_t* 394 dwarf2_abbrev_table_find_entry(const struct sparse_array* abbrev_table, 395 unsigned long entry_code) 396 { 397 assert( NULL != abbrev_table ); 398 return sparse_array_find(abbrev_table, entry_code); 399 } 400 401 static void dwarf2_parse_abbrev_set(dwarf2_traverse_context_t* abbrev_ctx, 402 struct sparse_array* abbrev_table, 403 struct pool* pool) 404 { 405 unsigned long entry_code; 406 dwarf2_abbrev_entry_t* abbrev_entry; 407 dwarf2_abbrev_entry_attr_t* new = NULL; 408 dwarf2_abbrev_entry_attr_t* last = NULL; 409 unsigned long attribute; 410 unsigned long form; 411 412 assert( NULL != abbrev_ctx ); 413 414 TRACE("%s, end at %p\n", 415 dwarf2_debug_traverse_ctx(abbrev_ctx), abbrev_ctx->end_data); 416 417 sparse_array_init(abbrev_table, sizeof(dwarf2_abbrev_entry_t), 32); 418 while (abbrev_ctx->data < abbrev_ctx->end_data) 419 { 420 TRACE("now at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx)); 421 entry_code = dwarf2_leb128_as_unsigned(abbrev_ctx); 422 TRACE("found entry_code %lu\n", entry_code); 423 if (!entry_code) 424 { 425 TRACE("NULL entry code at %s\n", dwarf2_debug_traverse_ctx(abbrev_ctx)); 426 break; 427 } 428 abbrev_entry = sparse_array_add(abbrev_table, entry_code, pool); 429 assert( NULL != abbrev_entry ); 430 431 abbrev_entry->entry_code = entry_code; 432 abbrev_entry->tag = dwarf2_leb128_as_unsigned(abbrev_ctx); 433 abbrev_entry->have_child = dwarf2_parse_byte(abbrev_ctx); 434 abbrev_entry->attrs = NULL; 435 abbrev_entry->num_attr = 0; 436 437 TRACE("table:(%p,#%u) entry_code(%lu) tag(0x%lx) have_child(%u) -> %p\n", 438 abbrev_table, sparse_array_length(abbrev_table), 439 entry_code, abbrev_entry->tag, abbrev_entry->have_child, abbrev_entry); 440 441 last = NULL; 442 while (1) 443 { 444 attribute = dwarf2_leb128_as_unsigned(abbrev_ctx); 445 form = dwarf2_leb128_as_unsigned(abbrev_ctx); 446 if (!attribute) break; 447 448 new = pool_alloc(pool, sizeof(dwarf2_abbrev_entry_attr_t)); 449 assert(new); 450 451 new->attribute = attribute; 452 new->form = form; 453 new->next = NULL; 454 if (abbrev_entry->attrs) last->next = new; 455 else abbrev_entry->attrs = new; 456 last = new; 457 abbrev_entry->num_attr++; 458 } 459 } 460 TRACE("found %u entries\n", sparse_array_length(abbrev_table)); 461 } 462 463 static void dwarf2_swallow_attribute(dwarf2_traverse_context_t* ctx, 464 const dwarf2_abbrev_entry_attr_t* abbrev_attr) 465 { 466 unsigned step; 467 468 TRACE("(attr:0x%lx,form:0x%lx)\n", abbrev_attr->attribute, abbrev_attr->form); 469 470 switch (abbrev_attr->form) 471 { 472 case DW_FORM_flag_present: step = 0; break; 473 case DW_FORM_ref_addr: 474 case DW_FORM_addr: step = ctx->word_size; break; 475 case DW_FORM_flag: 476 case DW_FORM_data1: 477 case DW_FORM_ref1: step = 1; break; 478 case DW_FORM_data2: 479 case DW_FORM_ref2: step = 2; break; 480 case DW_FORM_data4: 481 case DW_FORM_ref4: 482 case DW_FORM_strp: step = 4; break; 483 case DW_FORM_data8: 484 case DW_FORM_ref8: step = 8; break; 485 case DW_FORM_sdata: 486 case DW_FORM_ref_udata: 487 case DW_FORM_udata: step = dwarf2_leb128_length(ctx); break; 488 case DW_FORM_string: step = strlen((const char*)ctx->data) + 1; break; 489 case DW_FORM_block: step = dwarf2_leb128_as_unsigned(ctx); break; 490 case DW_FORM_block1: step = dwarf2_parse_byte(ctx); break; 491 case DW_FORM_block2: step = dwarf2_parse_u2(ctx); break; 492 case DW_FORM_block4: step = dwarf2_parse_u4(ctx); break; 493 default: 494 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); 495 return; 496 } 497 ctx->data += step; 498 } 499 500 static void dwarf2_fill_attr(const dwarf2_parse_context_t* ctx, 501 const dwarf2_abbrev_entry_attr_t* abbrev_attr, 502 const unsigned char* data, 503 struct attribute* attr) 504 { 505 attr->form = abbrev_attr->form; 506 switch (attr->form) 507 { 508 case DW_FORM_ref_addr: 509 case DW_FORM_addr: 510 attr->u.uvalue = dwarf2_get_addr(data, 511 ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size); 512 TRACE("addr<0x%lx>\n", attr->u.uvalue); 513 break; 514 515 case DW_FORM_flag: 516 attr->u.uvalue = dwarf2_get_byte(data); 517 TRACE("flag<0x%lx>\n", attr->u.uvalue); 518 break; 519 520 case DW_FORM_flag_present: 521 attr->u.uvalue = 1; 522 TRACE("flag_present\n"); 523 break; 524 525 case DW_FORM_data1: 526 attr->u.uvalue = dwarf2_get_byte(data); 527 TRACE("data1<%lu>\n", attr->u.uvalue); 528 break; 529 530 case DW_FORM_data2: 531 attr->u.uvalue = dwarf2_get_u2(data); 532 TRACE("data2<%lu>\n", attr->u.uvalue); 533 break; 534 535 case DW_FORM_data4: 536 attr->u.uvalue = dwarf2_get_u4(data); 537 TRACE("data4<%lu>\n", attr->u.uvalue); 538 break; 539 540 case DW_FORM_data8: 541 attr->u.lluvalue = dwarf2_get_u8(data); 542 TRACE("data8<%s>\n", wine_dbgstr_longlong(attr->u.uvalue)); 543 break; 544 545 case DW_FORM_ref1: 546 attr->u.uvalue = ctx->ref_offset + dwarf2_get_byte(data); 547 TRACE("ref1<0x%lx>\n", attr->u.uvalue); 548 break; 549 550 case DW_FORM_ref2: 551 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u2(data); 552 TRACE("ref2<0x%lx>\n", attr->u.uvalue); 553 break; 554 555 case DW_FORM_ref4: 556 attr->u.uvalue = ctx->ref_offset + dwarf2_get_u4(data); 557 TRACE("ref4<0x%lx>\n", attr->u.uvalue); 558 break; 559 560 case DW_FORM_ref8: 561 FIXME("Unhandled 64-bit support\n"); 562 break; 563 564 case DW_FORM_sdata: 565 attr->u.svalue = dwarf2_get_leb128_as_signed(data, NULL); 566 break; 567 568 case DW_FORM_ref_udata: 569 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); 570 break; 571 572 case DW_FORM_udata: 573 attr->u.uvalue = dwarf2_get_leb128_as_unsigned(data, NULL); 574 break; 575 576 case DW_FORM_string: 577 attr->u.string = (const char *)data; 578 TRACE("string<%s>\n", attr->u.string); 579 break; 580 581 case DW_FORM_strp: 582 { 583 unsigned long offset = dwarf2_get_u4(data); 584 attr->u.string = (const char*)ctx->sections[section_string].address + offset; 585 } 586 TRACE("strp<%s>\n", attr->u.string); 587 break; 588 589 case DW_FORM_block: 590 attr->u.block.size = dwarf2_get_leb128_as_unsigned(data, &attr->u.block.ptr); 591 break; 592 593 case DW_FORM_block1: 594 attr->u.block.size = dwarf2_get_byte(data); 595 attr->u.block.ptr = data + 1; 596 break; 597 598 case DW_FORM_block2: 599 attr->u.block.size = dwarf2_get_u2(data); 600 attr->u.block.ptr = data + 2; 601 break; 602 603 case DW_FORM_block4: 604 attr->u.block.size = dwarf2_get_u4(data); 605 attr->u.block.ptr = data + 4; 606 break; 607 608 default: 609 FIXME("Unhandled attribute form %lx\n", abbrev_attr->form); 610 break; 611 } 612 } 613 614 static BOOL dwarf2_find_attribute(const dwarf2_parse_context_t* ctx, 615 const dwarf2_debug_info_t* di, 616 unsigned at, struct attribute* attr) 617 { 618 unsigned i, refidx = 0; 619 dwarf2_abbrev_entry_attr_t* abbrev_attr; 620 dwarf2_abbrev_entry_attr_t* ref_abbrev_attr = NULL; 621 622 attr->gotten_from = attr_direct; 623 while (di) 624 { 625 ref_abbrev_attr = NULL; 626 for (i = 0, abbrev_attr = di->abbrev->attrs; abbrev_attr; i++, abbrev_attr = abbrev_attr->next) 627 { 628 if (abbrev_attr->attribute == at) 629 { 630 dwarf2_fill_attr(ctx, abbrev_attr, di->data[i], attr); 631 return TRUE; 632 } 633 if ((abbrev_attr->attribute == DW_AT_abstract_origin || 634 abbrev_attr->attribute == DW_AT_specification) && 635 at != DW_AT_sibling) 636 { 637 if (ref_abbrev_attr) 638 FIXME("two references %lx and %lx\n", ref_abbrev_attr->attribute, abbrev_attr->attribute); 639 ref_abbrev_attr = abbrev_attr; 640 refidx = i; 641 attr->gotten_from = (abbrev_attr->attribute == DW_AT_abstract_origin) ? 642 attr_abstract_origin : attr_specification; 643 } 644 } 645 /* do we have either an abstract origin or a specification debug entry to look into ? */ 646 if (!ref_abbrev_attr) break; 647 dwarf2_fill_attr(ctx, ref_abbrev_attr, di->data[refidx], attr); 648 if (!(di = sparse_array_find(&ctx->debug_info_table, attr->u.uvalue))) 649 FIXME("Should have found the debug info entry\n"); 650 } 651 return FALSE; 652 } 653 654 static void dwarf2_load_one_entry(dwarf2_parse_context_t*, dwarf2_debug_info_t*); 655 656 #define Wine_DW_no_register 0x7FFFFFFF 657 658 static unsigned dwarf2_map_register(int regno) 659 { 660 if (regno == Wine_DW_no_register) 661 { 662 FIXME("What the heck map reg 0x%x\n",regno); 663 return 0; 664 } 665 return dbghelp_current_cpu->map_dwarf_register(regno, FALSE); 666 } 667 668 static enum location_error 669 compute_location(dwarf2_traverse_context_t* ctx, struct location* loc, 670 HANDLE hproc, const struct location* frame) 671 { 672 DWORD_PTR tmp, stack[64]; 673 unsigned stk; 674 unsigned char op; 675 BOOL piece_found = FALSE; 676 677 stack[stk = 0] = 0; 678 679 loc->kind = loc_absolute; 680 loc->reg = Wine_DW_no_register; 681 682 while (ctx->data < ctx->end_data) 683 { 684 op = dwarf2_parse_byte(ctx); 685 686 if (op >= DW_OP_lit0 && op <= DW_OP_lit31) 687 stack[++stk] = op - DW_OP_lit0; 688 else if (op >= DW_OP_reg0 && op <= DW_OP_reg31) 689 { 690 /* dbghelp APIs don't know how to cope with this anyway 691 * (for example 'long long' stored in two registers) 692 * FIXME: We should tell winedbg how to deal with it (sigh) 693 */ 694 if (!piece_found) 695 { 696 DWORD cvreg = dwarf2_map_register(op - DW_OP_reg0); 697 if (loc->reg != Wine_DW_no_register) 698 FIXME("Only supporting one reg (%s/%d -> %s/%d)\n", 699 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg, 700 dbghelp_current_cpu->fetch_regname(cvreg), cvreg); 701 loc->reg = cvreg; 702 } 703 loc->kind = loc_register; 704 } 705 else if (op >= DW_OP_breg0 && op <= DW_OP_breg31) 706 { 707 /* dbghelp APIs don't know how to cope with this anyway 708 * (for example 'long long' stored in two registers) 709 * FIXME: We should tell winedbg how to deal with it (sigh) 710 */ 711 if (!piece_found) 712 { 713 DWORD cvreg = dwarf2_map_register(op - DW_OP_breg0); 714 if (loc->reg != Wine_DW_no_register) 715 FIXME("Only supporting one breg (%s/%d -> %s/%d)\n", 716 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg, 717 dbghelp_current_cpu->fetch_regname(cvreg), cvreg); 718 loc->reg = cvreg; 719 } 720 stack[++stk] = dwarf2_leb128_as_signed(ctx); 721 loc->kind = loc_regrel; 722 } 723 else switch (op) 724 { 725 case DW_OP_nop: break; 726 case DW_OP_addr: stack[++stk] = dwarf2_parse_addr(ctx); break; 727 case DW_OP_const1u: stack[++stk] = dwarf2_parse_byte(ctx); break; 728 case DW_OP_const1s: stack[++stk] = dwarf2_parse_byte(ctx); break; 729 case DW_OP_const2u: stack[++stk] = dwarf2_parse_u2(ctx); break; 730 case DW_OP_const2s: stack[++stk] = dwarf2_parse_u2(ctx); break; 731 case DW_OP_const4u: stack[++stk] = dwarf2_parse_u4(ctx); break; 732 case DW_OP_const4s: stack[++stk] = dwarf2_parse_u4(ctx); break; 733 case DW_OP_const8u: stack[++stk] = dwarf2_parse_u8(ctx); break; 734 case DW_OP_const8s: stack[++stk] = dwarf2_parse_u8(ctx); break; 735 case DW_OP_constu: stack[++stk] = dwarf2_leb128_as_unsigned(ctx); break; 736 case DW_OP_consts: stack[++stk] = dwarf2_leb128_as_signed(ctx); break; 737 case DW_OP_dup: stack[stk + 1] = stack[stk]; stk++; break; 738 case DW_OP_drop: stk--; break; 739 case DW_OP_over: stack[stk + 1] = stack[stk - 1]; stk++; break; 740 case DW_OP_pick: stack[stk + 1] = stack[stk - dwarf2_parse_byte(ctx)]; stk++; break; 741 case DW_OP_swap: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = tmp; break; 742 case DW_OP_rot: tmp = stack[stk]; stack[stk] = stack[stk-1]; stack[stk-1] = stack[stk-2]; stack[stk-2] = tmp; break; 743 case DW_OP_abs: stack[stk] = labs(stack[stk]); break; 744 case DW_OP_neg: stack[stk] = -stack[stk]; break; 745 case DW_OP_not: stack[stk] = ~stack[stk]; break; 746 case DW_OP_and: stack[stk-1] &= stack[stk]; stk--; break; 747 case DW_OP_or: stack[stk-1] |= stack[stk]; stk--; break; 748 case DW_OP_minus: stack[stk-1] -= stack[stk]; stk--; break; 749 case DW_OP_mul: stack[stk-1] *= stack[stk]; stk--; break; 750 case DW_OP_plus: stack[stk-1] += stack[stk]; stk--; break; 751 case DW_OP_xor: stack[stk-1] ^= stack[stk]; stk--; break; 752 case DW_OP_shl: stack[stk-1] <<= stack[stk]; stk--; break; 753 case DW_OP_shr: stack[stk-1] >>= stack[stk]; stk--; break; 754 case DW_OP_plus_uconst: stack[stk] += dwarf2_leb128_as_unsigned(ctx); break; 755 case DW_OP_shra: stack[stk-1] = stack[stk-1] / (1 << stack[stk]); stk--; break; 756 case DW_OP_div: stack[stk-1] = stack[stk-1] / stack[stk]; stk--; break; 757 case DW_OP_mod: stack[stk-1] = stack[stk-1] % stack[stk]; stk--; break; 758 case DW_OP_ge: stack[stk-1] = (stack[stk-1] >= stack[stk]); stk--; break; 759 case DW_OP_gt: stack[stk-1] = (stack[stk-1] > stack[stk]); stk--; break; 760 case DW_OP_le: stack[stk-1] = (stack[stk-1] <= stack[stk]); stk--; break; 761 case DW_OP_lt: stack[stk-1] = (stack[stk-1] < stack[stk]); stk--; break; 762 case DW_OP_eq: stack[stk-1] = (stack[stk-1] == stack[stk]); stk--; break; 763 case DW_OP_ne: stack[stk-1] = (stack[stk-1] != stack[stk]); stk--; break; 764 case DW_OP_skip: tmp = dwarf2_parse_u2(ctx); ctx->data += tmp; break; 765 case DW_OP_bra: tmp = dwarf2_parse_u2(ctx); if (!stack[stk--]) ctx->data += tmp; break; 766 case DW_OP_regx: 767 tmp = dwarf2_leb128_as_unsigned(ctx); 768 if (!piece_found) 769 { 770 if (loc->reg != Wine_DW_no_register) 771 FIXME("Only supporting one reg\n"); 772 loc->reg = dwarf2_map_register(tmp); 773 } 774 loc->kind = loc_register; 775 break; 776 case DW_OP_bregx: 777 tmp = dwarf2_leb128_as_unsigned(ctx); 778 if (loc->reg != Wine_DW_no_register) 779 FIXME("Only supporting one regx\n"); 780 loc->reg = dwarf2_map_register(tmp); 781 stack[++stk] = dwarf2_leb128_as_signed(ctx); 782 loc->kind = loc_regrel; 783 break; 784 case DW_OP_fbreg: 785 if (loc->reg != Wine_DW_no_register) 786 FIXME("Only supporting one reg (%s/%d -> -2)\n", 787 dbghelp_current_cpu->fetch_regname(loc->reg), loc->reg); 788 if (frame && frame->kind == loc_register) 789 { 790 loc->kind = loc_regrel; 791 loc->reg = frame->reg; 792 stack[++stk] = dwarf2_leb128_as_signed(ctx); 793 } 794 else if (frame && frame->kind == loc_regrel) 795 { 796 loc->kind = loc_regrel; 797 loc->reg = frame->reg; 798 stack[++stk] = dwarf2_leb128_as_signed(ctx) + frame->offset; 799 } 800 else 801 { 802 /* FIXME: this could be later optimized by not recomputing 803 * this very location expression 804 */ 805 loc->kind = loc_dwarf2_block; 806 stack[++stk] = dwarf2_leb128_as_signed(ctx); 807 } 808 break; 809 case DW_OP_piece: 810 { 811 unsigned sz = dwarf2_leb128_as_unsigned(ctx); 812 WARN("Not handling OP_piece (size=%d)\n", sz); 813 piece_found = TRUE; 814 } 815 break; 816 case DW_OP_deref: 817 if (!stk) 818 { 819 FIXME("Unexpected empty stack\n"); 820 return loc_err_internal; 821 } 822 if (loc->reg != Wine_DW_no_register) 823 { 824 WARN("Too complex expression for deref\n"); 825 return loc_err_too_complex; 826 } 827 if (hproc) 828 { 829 DWORD_PTR addr = stack[stk--]; 830 DWORD_PTR deref; 831 832 if (!ReadProcessMemory(hproc, (void*)addr, &deref, sizeof(deref), NULL)) 833 { 834 WARN("Couldn't read memory at %lx\n", addr); 835 return loc_err_cant_read; 836 } 837 stack[++stk] = deref; 838 } 839 else 840 { 841 loc->kind = loc_dwarf2_block; 842 } 843 break; 844 case DW_OP_deref_size: 845 if (!stk) 846 { 847 FIXME("Unexpected empty stack\n"); 848 return loc_err_internal; 849 } 850 if (loc->reg != Wine_DW_no_register) 851 { 852 WARN("Too complex expression for deref\n"); 853 return loc_err_too_complex; 854 } 855 if (hproc) 856 { 857 DWORD_PTR addr = stack[stk--]; 858 BYTE derefsize = dwarf2_parse_byte(ctx); 859 DWORD64 deref; 860 861 if (!ReadProcessMemory(hproc, (void*)addr, &deref, derefsize, NULL)) 862 { 863 WARN("Couldn't read memory at %lx\n", addr); 864 return loc_err_cant_read; 865 } 866 867 switch (derefsize) 868 { 869 case 1: stack[++stk] = *(unsigned char*)&deref; break; 870 case 2: stack[++stk] = *(unsigned short*)&deref; break; 871 case 4: stack[++stk] = *(DWORD*)&deref; break; 872 case 8: if (ctx->word_size >= derefsize) stack[++stk] = deref; break; 873 } 874 } 875 else 876 { 877 dwarf2_parse_byte(ctx); 878 loc->kind = loc_dwarf2_block; 879 } 880 break; 881 case DW_OP_stack_value: 882 /* Expected behaviour is that this is the last instruction of this 883 * expression and just the "top of stack" value should be put to loc->offset. */ 884 break; 885 default: 886 if (op < DW_OP_lo_user) /* as DW_OP_hi_user is 0xFF, we don't need to test against it */ 887 FIXME("Unhandled attr op: %x\n", op); 888 /* FIXME else unhandled extension */ 889 return loc_err_internal; 890 } 891 } 892 loc->offset = stack[stk]; 893 return 0; 894 } 895 896 static BOOL dwarf2_compute_location_attr(dwarf2_parse_context_t* ctx, 897 const dwarf2_debug_info_t* di, 898 unsigned long dw, 899 struct location* loc, 900 const struct location* frame) 901 { 902 struct attribute xloc; 903 904 if (!dwarf2_find_attribute(ctx, di, dw, &xloc)) return FALSE; 905 906 switch (xloc.form) 907 { 908 case DW_FORM_data1: case DW_FORM_data2: 909 case DW_FORM_udata: case DW_FORM_sdata: 910 loc->kind = loc_absolute; 911 loc->reg = 0; 912 loc->offset = xloc.u.uvalue; 913 return TRUE; 914 case DW_FORM_data4: case DW_FORM_data8: 915 loc->kind = loc_dwarf2_location_list; 916 loc->reg = Wine_DW_no_register; 917 loc->offset = xloc.u.uvalue; 918 return TRUE; 919 case DW_FORM_block: 920 case DW_FORM_block1: 921 case DW_FORM_block2: 922 case DW_FORM_block4: 923 break; 924 default: FIXME("Unsupported yet form %lx\n", xloc.form); 925 return FALSE; 926 } 927 928 /* assume we have a block form */ 929 930 if (xloc.u.block.size) 931 { 932 dwarf2_traverse_context_t lctx; 933 enum location_error err; 934 935 lctx.data = xloc.u.block.ptr; 936 lctx.end_data = xloc.u.block.ptr + xloc.u.block.size; 937 lctx.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 938 939 err = compute_location(&lctx, loc, NULL, frame); 940 if (err < 0) 941 { 942 loc->kind = loc_error; 943 loc->reg = err; 944 } 945 else if (loc->kind == loc_dwarf2_block) 946 { 947 unsigned* ptr = pool_alloc(&ctx->module->pool, 948 sizeof(unsigned) + xloc.u.block.size); 949 *ptr = xloc.u.block.size; 950 memcpy(ptr + 1, xloc.u.block.ptr, xloc.u.block.size); 951 #ifndef __REACTOS__ 952 loc->offset = (unsigned long)ptr; 953 #else 954 loc->offset = (uintptr_t)ptr; 955 #endif 956 } 957 } 958 return TRUE; 959 } 960 961 static struct symt* dwarf2_lookup_type(dwarf2_parse_context_t* ctx, 962 const dwarf2_debug_info_t* di) 963 { 964 struct attribute attr; 965 dwarf2_debug_info_t* type; 966 967 if (!dwarf2_find_attribute(ctx, di, DW_AT_type, &attr)) 968 return NULL; 969 if (!(type = sparse_array_find(&ctx->debug_info_table, attr.u.uvalue))) 970 { 971 FIXME("Unable to find back reference to type %lx\n", attr.u.uvalue); 972 return NULL; 973 } 974 if (!type->symt) 975 { 976 /* load the debug info entity */ 977 dwarf2_load_one_entry(ctx, type); 978 if (!type->symt) 979 FIXME("Unable to load forward reference for tag %lx\n", type->abbrev->tag); 980 } 981 return type->symt; 982 } 983 984 static const char* dwarf2_get_cpp_name(dwarf2_parse_context_t* ctx, dwarf2_debug_info_t* di, const char* name) 985 { 986 char* last; 987 struct attribute diname; 988 struct attribute spec; 989 990 if (di->abbrev->tag == DW_TAG_compile_unit) return name; 991 if (!ctx->cpp_name) 992 ctx->cpp_name = pool_alloc(&ctx->pool, MAX_SYM_NAME); 993 last = ctx->cpp_name + MAX_SYM_NAME - strlen(name) - 1; 994 strcpy(last, name); 995 996 /* if the di is a definition, but has also a (previous) declaration, then scope must 997 * be gotten from declaration not definition 998 */ 999 if (dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec) && spec.gotten_from == attr_direct) 1000 { 1001 di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue); 1002 if (!di) 1003 { 1004 FIXME("Should have found the debug info entry\n"); 1005 return NULL; 1006 } 1007 } 1008 1009 for (di = di->parent; di; di = di->parent) 1010 { 1011 switch (di->abbrev->tag) 1012 { 1013 case DW_TAG_namespace: 1014 case DW_TAG_structure_type: 1015 case DW_TAG_class_type: 1016 case DW_TAG_interface_type: 1017 case DW_TAG_union_type: 1018 if (dwarf2_find_attribute(ctx, di, DW_AT_name, &diname)) 1019 { 1020 size_t len = strlen(diname.u.string); 1021 last -= 2 + len; 1022 if (last < ctx->cpp_name) return NULL; 1023 memcpy(last, diname.u.string, len); 1024 last[len] = last[len + 1] = ':'; 1025 } 1026 break; 1027 default: 1028 break; 1029 } 1030 } 1031 return last; 1032 } 1033 1034 /****************************************************************** 1035 * dwarf2_read_range 1036 * 1037 * read a range for a given debug_info (either using AT_range attribute, in which 1038 * case we don't return all the details, or using AT_low_pc & AT_high_pc attributes) 1039 * in all cases, range is relative to beginning of compilation unit 1040 */ 1041 static BOOL dwarf2_read_range(dwarf2_parse_context_t* ctx, const dwarf2_debug_info_t* di, 1042 unsigned long* plow, unsigned long* phigh) 1043 { 1044 struct attribute range; 1045 1046 if (dwarf2_find_attribute(ctx, di, DW_AT_ranges, &range)) 1047 { 1048 dwarf2_traverse_context_t traverse; 1049 unsigned long low, high; 1050 1051 traverse.data = ctx->sections[section_ranges].address + range.u.uvalue; 1052 traverse.end_data = ctx->sections[section_ranges].address + 1053 ctx->sections[section_ranges].size; 1054 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 1055 1056 *plow = ULONG_MAX; 1057 *phigh = 0; 1058 while (traverse.data + 2 * traverse.word_size < traverse.end_data) 1059 { 1060 low = dwarf2_parse_addr(&traverse); 1061 high = dwarf2_parse_addr(&traverse); 1062 if (low == 0 && high == 0) break; 1063 if (low == ULONG_MAX) FIXME("unsupported yet (base address selection)\n"); 1064 if (low < *plow) *plow = low; 1065 if (high > *phigh) *phigh = high; 1066 } 1067 if (*plow == ULONG_MAX || *phigh == 0) {FIXME("no entry found\n"); return FALSE;} 1068 if (*plow == *phigh) {FIXME("entry found, but low=high\n"); return FALSE;} 1069 1070 return TRUE; 1071 } 1072 else 1073 { 1074 struct attribute low_pc; 1075 struct attribute high_pc; 1076 1077 if (!dwarf2_find_attribute(ctx, di, DW_AT_low_pc, &low_pc) || 1078 !dwarf2_find_attribute(ctx, di, DW_AT_high_pc, &high_pc)) 1079 return FALSE; 1080 *plow = low_pc.u.uvalue; 1081 *phigh = high_pc.u.uvalue; 1082 return TRUE; 1083 } 1084 } 1085 1086 /****************************************************************** 1087 * dwarf2_read_one_debug_info 1088 * 1089 * Loads into memory one debug info entry, and recursively its children (if any) 1090 */ 1091 static BOOL dwarf2_read_one_debug_info(dwarf2_parse_context_t* ctx, 1092 dwarf2_traverse_context_t* traverse, 1093 dwarf2_debug_info_t* parent_di, 1094 dwarf2_debug_info_t** pdi) 1095 { 1096 const dwarf2_abbrev_entry_t*abbrev; 1097 unsigned long entry_code; 1098 unsigned long offset; 1099 dwarf2_debug_info_t* di; 1100 dwarf2_debug_info_t* child; 1101 dwarf2_debug_info_t** where; 1102 dwarf2_abbrev_entry_attr_t* attr; 1103 unsigned i; 1104 struct attribute sibling; 1105 1106 offset = traverse->data - ctx->sections[ctx->section].address; 1107 entry_code = dwarf2_leb128_as_unsigned(traverse); 1108 TRACE("found entry_code %lu at 0x%lx\n", entry_code, offset); 1109 if (!entry_code) 1110 { 1111 *pdi = NULL; 1112 return TRUE; 1113 } 1114 abbrev = dwarf2_abbrev_table_find_entry(&ctx->abbrev_table, entry_code); 1115 if (!abbrev) 1116 { 1117 WARN("Cannot find abbrev entry for %lu at 0x%lx\n", entry_code, offset); 1118 return FALSE; 1119 } 1120 di = sparse_array_add(&ctx->debug_info_table, offset, &ctx->pool); 1121 if (!di) return FALSE; 1122 di->abbrev = abbrev; 1123 di->symt = NULL; 1124 di->parent = parent_di; 1125 1126 if (abbrev->num_attr) 1127 { 1128 di->data = pool_alloc(&ctx->pool, abbrev->num_attr * sizeof(const char*)); 1129 for (i = 0, attr = abbrev->attrs; attr; i++, attr = attr->next) 1130 { 1131 di->data[i] = traverse->data; 1132 dwarf2_swallow_attribute(traverse, attr); 1133 } 1134 } 1135 else di->data = NULL; 1136 if (abbrev->have_child) 1137 { 1138 vector_init(&di->children, sizeof(dwarf2_debug_info_t*), 16); 1139 while (traverse->data < traverse->end_data) 1140 { 1141 if (!dwarf2_read_one_debug_info(ctx, traverse, di, &child)) return FALSE; 1142 if (!child) break; 1143 where = vector_add(&di->children, &ctx->pool); 1144 if (!where) return FALSE; 1145 *where = child; 1146 } 1147 } 1148 if (dwarf2_find_attribute(ctx, di, DW_AT_sibling, &sibling) && 1149 traverse->data != ctx->sections[ctx->section].address + sibling.u.uvalue) 1150 { 1151 WARN("setting cursor for %s to next sibling <0x%lx>\n", 1152 dwarf2_debug_traverse_ctx(traverse), sibling.u.uvalue); 1153 traverse->data = ctx->sections[ctx->section].address + sibling.u.uvalue; 1154 } 1155 *pdi = di; 1156 return TRUE; 1157 } 1158 1159 static struct vector* dwarf2_get_di_children(dwarf2_parse_context_t* ctx, 1160 dwarf2_debug_info_t* di) 1161 { 1162 struct attribute spec; 1163 1164 while (di) 1165 { 1166 if (di->abbrev->have_child) 1167 return &di->children; 1168 if (!dwarf2_find_attribute(ctx, di, DW_AT_specification, &spec)) break; 1169 if (!(di = sparse_array_find(&ctx->debug_info_table, spec.u.uvalue))) 1170 FIXME("Should have found the debug info entry\n"); 1171 } 1172 return NULL; 1173 } 1174 1175 static struct symt* dwarf2_parse_base_type(dwarf2_parse_context_t* ctx, 1176 dwarf2_debug_info_t* di) 1177 { 1178 struct attribute name; 1179 struct attribute size; 1180 struct attribute encoding; 1181 enum BasicType bt; 1182 int cache_idx = -1; 1183 if (di->symt) return di->symt; 1184 1185 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1186 1187 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1188 name.u.string = NULL; 1189 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; 1190 if (!dwarf2_find_attribute(ctx, di, DW_AT_encoding, &encoding)) encoding.u.uvalue = DW_ATE_void; 1191 1192 switch (encoding.u.uvalue) 1193 { 1194 case DW_ATE_void: bt = btVoid; break; 1195 case DW_ATE_address: bt = btULong; break; 1196 case DW_ATE_boolean: bt = btBool; break; 1197 case DW_ATE_complex_float: bt = btComplex; break; 1198 case DW_ATE_float: bt = btFloat; break; 1199 case DW_ATE_signed: bt = btInt; break; 1200 case DW_ATE_unsigned: bt = btUInt; break; 1201 case DW_ATE_signed_char: bt = btChar; break; 1202 case DW_ATE_unsigned_char: bt = btChar; break; 1203 default: bt = btNoType; break; 1204 } 1205 di->symt = &symt_new_basic(ctx->module, bt, name.u.string, size.u.uvalue)->symt; 1206 switch (bt) 1207 { 1208 case btVoid: 1209 assert(size.u.uvalue == 0); 1210 cache_idx = sc_void; 1211 break; 1212 case btInt: 1213 switch (size.u.uvalue) 1214 { 1215 case 1: cache_idx = sc_int1; break; 1216 case 2: cache_idx = sc_int2; break; 1217 case 4: cache_idx = sc_int4; break; 1218 } 1219 break; 1220 default: break; 1221 } 1222 if (cache_idx != -1 && !ctx->symt_cache[cache_idx]) 1223 ctx->symt_cache[cache_idx] = di->symt; 1224 1225 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1226 return di->symt; 1227 } 1228 1229 static struct symt* dwarf2_parse_typedef(dwarf2_parse_context_t* ctx, 1230 dwarf2_debug_info_t* di) 1231 { 1232 struct symt* ref_type; 1233 struct attribute name; 1234 1235 if (di->symt) return di->symt; 1236 1237 TRACE("%s, for %lu\n", dwarf2_debug_ctx(ctx), di->abbrev->entry_code); 1238 1239 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1240 ref_type = dwarf2_lookup_type(ctx, di); 1241 1242 if (name.u.string) 1243 di->symt = &symt_new_typedef(ctx->module, ref_type, name.u.string)->symt; 1244 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1245 return di->symt; 1246 } 1247 1248 static struct symt* dwarf2_parse_pointer_type(dwarf2_parse_context_t* ctx, 1249 dwarf2_debug_info_t* di) 1250 { 1251 struct symt* ref_type; 1252 struct attribute size; 1253 1254 if (di->symt) return di->symt; 1255 1256 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1257 1258 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = sizeof(void *); 1259 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1260 { 1261 ref_type = ctx->symt_cache[sc_void]; 1262 assert(ref_type); 1263 } 1264 di->symt = &symt_new_pointer(ctx->module, ref_type, size.u.uvalue)->symt; 1265 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1266 return di->symt; 1267 } 1268 1269 static struct symt* dwarf2_parse_array_type(dwarf2_parse_context_t* ctx, 1270 dwarf2_debug_info_t* di) 1271 { 1272 struct symt* ref_type; 1273 struct symt* idx_type = NULL; 1274 struct attribute min, max, cnt; 1275 dwarf2_debug_info_t* child; 1276 unsigned int i; 1277 const struct vector* children; 1278 1279 if (di->symt) return di->symt; 1280 1281 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1282 1283 ref_type = dwarf2_lookup_type(ctx, di); 1284 1285 if (!(children = dwarf2_get_di_children(ctx, di))) 1286 { 1287 /* fake an array with unknown size */ 1288 /* FIXME: int4 even on 64bit machines??? */ 1289 idx_type = ctx->symt_cache[sc_int4]; 1290 min.u.uvalue = 0; 1291 max.u.uvalue = -1; 1292 } 1293 else for (i = 0; i < vector_length(children); i++) 1294 { 1295 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1296 switch (child->abbrev->tag) 1297 { 1298 case DW_TAG_subrange_type: 1299 idx_type = dwarf2_lookup_type(ctx, child); 1300 if (!dwarf2_find_attribute(ctx, child, DW_AT_lower_bound, &min)) 1301 min.u.uvalue = 0; 1302 if (!dwarf2_find_attribute(ctx, child, DW_AT_upper_bound, &max)) 1303 max.u.uvalue = 0; 1304 if (dwarf2_find_attribute(ctx, child, DW_AT_count, &cnt)) 1305 max.u.uvalue = min.u.uvalue + cnt.u.uvalue; 1306 break; 1307 default: 1308 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1309 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1310 break; 1311 } 1312 } 1313 di->symt = &symt_new_array(ctx->module, min.u.uvalue, max.u.uvalue, ref_type, idx_type)->symt; 1314 return di->symt; 1315 } 1316 1317 static struct symt* dwarf2_parse_const_type(dwarf2_parse_context_t* ctx, 1318 dwarf2_debug_info_t* di) 1319 { 1320 struct symt* ref_type; 1321 1322 if (di->symt) return di->symt; 1323 1324 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1325 1326 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1327 { 1328 ref_type = ctx->symt_cache[sc_void]; 1329 assert(ref_type); 1330 } 1331 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1332 di->symt = ref_type; 1333 1334 return ref_type; 1335 } 1336 1337 static struct symt* dwarf2_parse_volatile_type(dwarf2_parse_context_t* ctx, 1338 dwarf2_debug_info_t* di) 1339 { 1340 struct symt* ref_type; 1341 1342 if (di->symt) return di->symt; 1343 1344 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1345 1346 if (!(ref_type = dwarf2_lookup_type(ctx, di))) 1347 { 1348 ref_type = ctx->symt_cache[sc_void]; 1349 assert(ref_type); 1350 } 1351 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1352 di->symt = ref_type; 1353 1354 return ref_type; 1355 } 1356 1357 static struct symt* dwarf2_parse_unspecified_type(dwarf2_parse_context_t* ctx, 1358 dwarf2_debug_info_t* di) 1359 { 1360 struct attribute name; 1361 struct attribute size; 1362 struct symt_basic *basic; 1363 1364 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1365 1366 if (di->symt) return di->symt; 1367 1368 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1369 name.u.string = "void"; 1370 size.u.uvalue = sizeof(void *); 1371 1372 basic = symt_new_basic(ctx->module, btVoid, name.u.string, size.u.uvalue); 1373 di->symt = &basic->symt; 1374 1375 if (!ctx->symt_cache[sc_void]) 1376 ctx->symt_cache[sc_void] = di->symt; 1377 1378 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1379 return di->symt; 1380 } 1381 1382 static struct symt* dwarf2_parse_reference_type(dwarf2_parse_context_t* ctx, 1383 dwarf2_debug_info_t* di) 1384 { 1385 struct symt* ref_type = NULL; 1386 1387 if (di->symt) return di->symt; 1388 1389 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1390 1391 ref_type = dwarf2_lookup_type(ctx, di); 1392 /* FIXME: for now, we hard-wire C++ references to pointers */ 1393 di->symt = &symt_new_pointer(ctx->module, ref_type, sizeof(void *))->symt; 1394 1395 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1396 1397 return di->symt; 1398 } 1399 1400 static void dwarf2_parse_udt_member(dwarf2_parse_context_t* ctx, 1401 dwarf2_debug_info_t* di, 1402 struct symt_udt* parent) 1403 { 1404 struct symt* elt_type; 1405 struct attribute name; 1406 struct attribute bit_size; 1407 struct attribute bit_offset; 1408 struct location loc; 1409 1410 assert(parent); 1411 1412 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1413 1414 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1415 elt_type = dwarf2_lookup_type(ctx, di); 1416 if (dwarf2_compute_location_attr(ctx, di, DW_AT_data_member_location, &loc, NULL)) 1417 { 1418 if (loc.kind != loc_absolute) 1419 { 1420 FIXME("Found register, while not expecting it\n"); 1421 loc.offset = 0; 1422 } 1423 else 1424 TRACE("found member_location at %s -> %lu\n", 1425 dwarf2_debug_ctx(ctx), loc.offset); 1426 } 1427 else 1428 loc.offset = 0; 1429 if (!dwarf2_find_attribute(ctx, di, DW_AT_bit_size, &bit_size)) 1430 bit_size.u.uvalue = 0; 1431 if (dwarf2_find_attribute(ctx, di, DW_AT_bit_offset, &bit_offset)) 1432 { 1433 /* FIXME: we should only do this when implementation is LSB (which is 1434 * the case on i386 processors) 1435 */ 1436 struct attribute nbytes; 1437 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &nbytes)) 1438 { 1439 DWORD64 size; 1440 nbytes.u.uvalue = symt_get_info(ctx->module, elt_type, TI_GET_LENGTH, &size) ? 1441 (unsigned long)size : 0; 1442 } 1443 bit_offset.u.uvalue = nbytes.u.uvalue * 8 - bit_offset.u.uvalue - bit_size.u.uvalue; 1444 } 1445 else bit_offset.u.uvalue = 0; 1446 symt_add_udt_element(ctx->module, parent, name.u.string, elt_type, 1447 (loc.offset << 3) + bit_offset.u.uvalue, 1448 bit_size.u.uvalue); 1449 1450 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1451 } 1452 1453 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx, 1454 dwarf2_debug_info_t* di); 1455 1456 static struct symt* dwarf2_parse_udt_type(dwarf2_parse_context_t* ctx, 1457 dwarf2_debug_info_t* di, 1458 enum UdtKind udt) 1459 { 1460 struct attribute name; 1461 struct attribute size; 1462 struct vector* children; 1463 dwarf2_debug_info_t*child; 1464 unsigned int i; 1465 1466 if (di->symt) return di->symt; 1467 1468 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1469 1470 /* quirk... FIXME provide real support for anonymous UDTs */ 1471 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1472 name.u.string = "zz_anon_zz"; 1473 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 0; 1474 1475 di->symt = &symt_new_udt(ctx->module, dwarf2_get_cpp_name(ctx, di, name.u.string), 1476 size.u.uvalue, udt)->symt; 1477 1478 children = dwarf2_get_di_children(ctx, di); 1479 if (children) for (i = 0; i < vector_length(children); i++) 1480 { 1481 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1482 1483 switch (child->abbrev->tag) 1484 { 1485 case DW_TAG_array_type: 1486 dwarf2_parse_array_type(ctx, di); 1487 break; 1488 case DW_TAG_member: 1489 /* FIXME: should I follow the sibling stuff ?? */ 1490 dwarf2_parse_udt_member(ctx, child, (struct symt_udt*)di->symt); 1491 break; 1492 case DW_TAG_enumeration_type: 1493 dwarf2_parse_enumeration_type(ctx, child); 1494 break; 1495 case DW_TAG_subprogram: 1496 dwarf2_parse_subprogram(ctx, child); 1497 break; 1498 case DW_TAG_const_type: 1499 dwarf2_parse_const_type(ctx, child); 1500 break; 1501 case DW_TAG_structure_type: 1502 case DW_TAG_class_type: 1503 case DW_TAG_union_type: 1504 case DW_TAG_typedef: 1505 /* FIXME: we need to handle nested udt definitions */ 1506 case DW_TAG_inheritance: 1507 case DW_TAG_template_type_param: 1508 case DW_TAG_template_value_param: 1509 case DW_TAG_variable: 1510 case DW_TAG_imported_declaration: 1511 case DW_TAG_ptr_to_member_type: 1512 case DW_TAG_GNU_template_parameter_pack: 1513 case DW_TAG_GNU_formal_parameter_pack: 1514 /* FIXME: some C++ related stuff */ 1515 break; 1516 default: 1517 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1518 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1519 break; 1520 } 1521 } 1522 1523 return di->symt; 1524 } 1525 1526 static void dwarf2_parse_enumerator(dwarf2_parse_context_t* ctx, 1527 dwarf2_debug_info_t* di, 1528 struct symt_enum* parent) 1529 { 1530 struct attribute name; 1531 struct attribute value; 1532 1533 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1534 1535 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) return; 1536 if (!dwarf2_find_attribute(ctx, di, DW_AT_const_value, &value)) value.u.svalue = 0; 1537 symt_add_enum_element(ctx->module, parent, name.u.string, value.u.svalue); 1538 1539 if (dwarf2_get_di_children(ctx, di)) FIXME("Unsupported children\n"); 1540 } 1541 1542 static struct symt* dwarf2_parse_enumeration_type(dwarf2_parse_context_t* ctx, 1543 dwarf2_debug_info_t* di) 1544 { 1545 struct attribute name; 1546 struct attribute size; 1547 struct symt_basic* basetype; 1548 struct vector* children; 1549 dwarf2_debug_info_t*child; 1550 unsigned int i; 1551 1552 if (di->symt) return di->symt; 1553 1554 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1555 1556 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) name.u.string = NULL; 1557 if (!dwarf2_find_attribute(ctx, di, DW_AT_byte_size, &size)) size.u.uvalue = 4; 1558 1559 switch (size.u.uvalue) /* FIXME: that's wrong */ 1560 { 1561 case 1: basetype = symt_new_basic(ctx->module, btInt, "char", 1); break; 1562 case 2: basetype = symt_new_basic(ctx->module, btInt, "short", 2); break; 1563 default: 1564 case 4: basetype = symt_new_basic(ctx->module, btInt, "int", 4); break; 1565 } 1566 1567 di->symt = &symt_new_enum(ctx->module, name.u.string, &basetype->symt)->symt; 1568 1569 children = dwarf2_get_di_children(ctx, di); 1570 /* FIXME: should we use the sibling stuff ?? */ 1571 if (children) for (i = 0; i < vector_length(children); i++) 1572 { 1573 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1574 1575 switch (child->abbrev->tag) 1576 { 1577 case DW_TAG_enumerator: 1578 dwarf2_parse_enumerator(ctx, child, (struct symt_enum*)di->symt); 1579 break; 1580 default: 1581 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1582 di->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1583 } 1584 } 1585 return di->symt; 1586 } 1587 1588 /* structure used to pass information around when parsing a subprogram */ 1589 typedef struct dwarf2_subprogram_s 1590 { 1591 dwarf2_parse_context_t* ctx; 1592 struct symt_function* func; 1593 BOOL non_computed_variable; 1594 struct location frame; 1595 } dwarf2_subprogram_t; 1596 1597 /****************************************************************** 1598 * dwarf2_parse_variable 1599 * 1600 * Parses any variable (parameter, local/global variable) 1601 */ 1602 static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm, 1603 struct symt_block* block, 1604 dwarf2_debug_info_t* di) 1605 { 1606 struct symt* param_type; 1607 struct attribute name, value; 1608 struct location loc; 1609 BOOL is_pmt; 1610 1611 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1612 1613 is_pmt = !block && di->abbrev->tag == DW_TAG_formal_parameter; 1614 param_type = dwarf2_lookup_type(subpgm->ctx, di); 1615 1616 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) { 1617 /* cannot do much without the name, the functions below won't like it. */ 1618 return; 1619 } 1620 if (dwarf2_compute_location_attr(subpgm->ctx, di, DW_AT_location, 1621 &loc, &subpgm->frame)) 1622 { 1623 struct attribute ext; 1624 1625 TRACE("found parameter %s (kind=%d, offset=%ld, reg=%d) at %s\n", 1626 name.u.string, loc.kind, loc.offset, loc.reg, 1627 dwarf2_debug_ctx(subpgm->ctx)); 1628 1629 switch (loc.kind) 1630 { 1631 case loc_error: 1632 break; 1633 case loc_absolute: 1634 /* it's a global variable */ 1635 /* FIXME: we don't handle its scope yet */ 1636 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_external, &ext)) 1637 ext.u.uvalue = 0; 1638 loc.offset += subpgm->ctx->load_offset; 1639 symt_new_global_variable(subpgm->ctx->module, subpgm->ctx->compiland, 1640 dwarf2_get_cpp_name(subpgm->ctx, di, name.u.string), !ext.u.uvalue, 1641 loc, 0, param_type); 1642 break; 1643 default: 1644 subpgm->non_computed_variable = TRUE; 1645 /* fall through */ 1646 case loc_register: 1647 case loc_regrel: 1648 /* either a pmt/variable relative to frame pointer or 1649 * pmt/variable in a register 1650 */ 1651 assert(subpgm->func); 1652 symt_add_func_local(subpgm->ctx->module, subpgm->func, 1653 is_pmt ? DataIsParam : DataIsLocal, 1654 &loc, block, param_type, name.u.string); 1655 break; 1656 } 1657 } 1658 else if (dwarf2_find_attribute(subpgm->ctx, di, DW_AT_const_value, &value)) 1659 { 1660 VARIANT v; 1661 if (subpgm->func) WARN("Unsupported constant %s in function\n", name.u.string); 1662 if (is_pmt) FIXME("Unsupported constant (parameter) %s in function\n", name.u.string); 1663 switch (value.form) 1664 { 1665 case DW_FORM_data1: 1666 case DW_FORM_data2: 1667 case DW_FORM_data4: 1668 case DW_FORM_udata: 1669 case DW_FORM_addr: 1670 v.n1.n2.vt = VT_UI4; 1671 v.n1.n2.n3.lVal = value.u.uvalue; 1672 break; 1673 1674 case DW_FORM_data8: 1675 v.n1.n2.vt = VT_UI8; 1676 v.n1.n2.n3.llVal = value.u.lluvalue; 1677 break; 1678 1679 case DW_FORM_sdata: 1680 v.n1.n2.vt = VT_I4; 1681 v.n1.n2.n3.lVal = value.u.svalue; 1682 break; 1683 1684 case DW_FORM_strp: 1685 case DW_FORM_string: 1686 /* FIXME: native doesn't report const strings from here !! 1687 * however, the value of the string is in the code somewhere 1688 */ 1689 v.n1.n2.vt = VT_I1 | VT_BYREF; 1690 v.n1.n2.n3.byref = pool_strdup(&subpgm->ctx->module->pool, value.u.string); 1691 break; 1692 1693 case DW_FORM_block: 1694 case DW_FORM_block1: 1695 case DW_FORM_block2: 1696 case DW_FORM_block4: 1697 v.n1.n2.vt = VT_I4; 1698 switch (value.u.block.size) 1699 { 1700 case 1: v.n1.n2.n3.lVal = *(BYTE*)value.u.block.ptr; break; 1701 case 2: v.n1.n2.n3.lVal = *(USHORT*)value.u.block.ptr; break; 1702 case 4: v.n1.n2.n3.lVal = *(DWORD*)value.u.block.ptr; break; 1703 default: 1704 v.n1.n2.vt = VT_I1 | VT_BYREF; 1705 v.n1.n2.n3.byref = pool_alloc(&subpgm->ctx->module->pool, value.u.block.size); 1706 memcpy(v.n1.n2.n3.byref, value.u.block.ptr, value.u.block.size); 1707 } 1708 break; 1709 1710 default: 1711 FIXME("Unsupported form for const value %s (%lx)\n", 1712 name.u.string, value.form); 1713 v.n1.n2.vt = VT_EMPTY; 1714 } 1715 di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->ctx->compiland, 1716 name.u.string, param_type, &v)->symt; 1717 } 1718 else 1719 { 1720 /* variable has been optimized away... report anyway */ 1721 loc.kind = loc_error; 1722 loc.reg = loc_err_no_location; 1723 if (subpgm->func) 1724 { 1725 symt_add_func_local(subpgm->ctx->module, subpgm->func, 1726 is_pmt ? DataIsParam : DataIsLocal, 1727 &loc, block, param_type, name.u.string); 1728 } 1729 else 1730 { 1731 WARN("dropping global variable %s which has been optimized away\n", name.u.string); 1732 } 1733 } 1734 if (is_pmt && subpgm->func && subpgm->func->type) 1735 symt_add_function_signature_parameter(subpgm->ctx->module, 1736 (struct symt_function_signature*)subpgm->func->type, 1737 param_type); 1738 1739 if (dwarf2_get_di_children(subpgm->ctx, di)) FIXME("Unsupported children\n"); 1740 } 1741 1742 static void dwarf2_parse_subprogram_label(dwarf2_subprogram_t* subpgm, 1743 const dwarf2_debug_info_t* di) 1744 { 1745 struct attribute name; 1746 struct attribute low_pc; 1747 struct location loc; 1748 1749 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1750 1751 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_low_pc, &low_pc)) low_pc.u.uvalue = 0; 1752 if (!dwarf2_find_attribute(subpgm->ctx, di, DW_AT_name, &name)) 1753 name.u.string = NULL; 1754 1755 loc.kind = loc_absolute; 1756 loc.offset = subpgm->ctx->load_offset + low_pc.u.uvalue; 1757 symt_add_function_point(subpgm->ctx->module, subpgm->func, SymTagLabel, 1758 &loc, name.u.string); 1759 } 1760 1761 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, 1762 struct symt_block* parent_block, 1763 dwarf2_debug_info_t* di); 1764 1765 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx, 1766 dwarf2_debug_info_t* di); 1767 1768 static void dwarf2_parse_inlined_subroutine(dwarf2_subprogram_t* subpgm, 1769 struct symt_block* parent_block, 1770 dwarf2_debug_info_t* di) 1771 { 1772 struct symt_block* block; 1773 unsigned long low_pc, high_pc; 1774 struct vector* children; 1775 dwarf2_debug_info_t*child; 1776 unsigned int i; 1777 1778 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1779 1780 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc)) 1781 { 1782 FIXME("cannot read range\n"); 1783 return; 1784 } 1785 1786 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, 1787 subpgm->ctx->load_offset + low_pc - subpgm->func->address, 1788 high_pc - low_pc); 1789 1790 children = dwarf2_get_di_children(subpgm->ctx, di); 1791 if (children) for (i = 0; i < vector_length(children); i++) 1792 { 1793 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1794 1795 switch (child->abbrev->tag) 1796 { 1797 case DW_TAG_formal_parameter: 1798 case DW_TAG_variable: 1799 dwarf2_parse_variable(subpgm, block, child); 1800 break; 1801 case DW_TAG_lexical_block: 1802 dwarf2_parse_subprogram_block(subpgm, block, child); 1803 break; 1804 case DW_TAG_inlined_subroutine: 1805 dwarf2_parse_inlined_subroutine(subpgm, block, child); 1806 break; 1807 case DW_TAG_label: 1808 dwarf2_parse_subprogram_label(subpgm, child); 1809 break; 1810 case DW_TAG_GNU_call_site: 1811 /* this isn't properly supported by dbghelp interface. skip it for now */ 1812 break; 1813 default: 1814 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1815 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), 1816 dwarf2_debug_di(di)); 1817 } 1818 } 1819 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0); 1820 } 1821 1822 static void dwarf2_parse_subprogram_block(dwarf2_subprogram_t* subpgm, 1823 struct symt_block* parent_block, 1824 dwarf2_debug_info_t* di) 1825 { 1826 struct symt_block* block; 1827 unsigned long low_pc, high_pc; 1828 struct vector* children; 1829 dwarf2_debug_info_t*child; 1830 unsigned int i; 1831 1832 TRACE("%s, for %s\n", dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1833 1834 if (!dwarf2_read_range(subpgm->ctx, di, &low_pc, &high_pc)) 1835 { 1836 WARN("no range\n"); 1837 return; 1838 } 1839 1840 block = symt_open_func_block(subpgm->ctx->module, subpgm->func, parent_block, 1841 subpgm->ctx->load_offset + low_pc - subpgm->func->address, 1842 high_pc - low_pc); 1843 1844 children = dwarf2_get_di_children(subpgm->ctx, di); 1845 if (children) for (i = 0; i < vector_length(children); i++) 1846 { 1847 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1848 1849 switch (child->abbrev->tag) 1850 { 1851 case DW_TAG_inlined_subroutine: 1852 dwarf2_parse_inlined_subroutine(subpgm, block, child); 1853 break; 1854 case DW_TAG_variable: 1855 dwarf2_parse_variable(subpgm, block, child); 1856 break; 1857 case DW_TAG_pointer_type: 1858 dwarf2_parse_pointer_type(subpgm->ctx, di); 1859 break; 1860 case DW_TAG_subroutine_type: 1861 dwarf2_parse_subroutine_type(subpgm->ctx, di); 1862 break; 1863 case DW_TAG_const_type: 1864 dwarf2_parse_const_type(subpgm->ctx, di); 1865 break; 1866 case DW_TAG_lexical_block: 1867 dwarf2_parse_subprogram_block(subpgm, block, child); 1868 break; 1869 case DW_TAG_subprogram: 1870 /* FIXME: likely a declaration (to be checked) 1871 * skip it for now 1872 */ 1873 break; 1874 case DW_TAG_formal_parameter: 1875 /* FIXME: likely elements for exception handling (GCC flavor) 1876 * Skip it for now 1877 */ 1878 break; 1879 case DW_TAG_imported_module: 1880 /* C++ stuff to be silenced (for now) */ 1881 break; 1882 case DW_TAG_GNU_call_site: 1883 /* this isn't properly supported by dbghelp interface. skip it for now */ 1884 break; 1885 case DW_TAG_label: 1886 dwarf2_parse_subprogram_label(subpgm, child); 1887 break; 1888 case DW_TAG_class_type: 1889 case DW_TAG_structure_type: 1890 case DW_TAG_union_type: 1891 case DW_TAG_enumeration_type: 1892 case DW_TAG_typedef: 1893 /* the type referred to will be loaded when we need it, so skip it */ 1894 break; 1895 default: 1896 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 1897 child->abbrev->tag, dwarf2_debug_ctx(subpgm->ctx), dwarf2_debug_di(di)); 1898 } 1899 } 1900 1901 symt_close_func_block(subpgm->ctx->module, subpgm->func, block, 0); 1902 } 1903 1904 static struct symt* dwarf2_parse_subprogram(dwarf2_parse_context_t* ctx, 1905 dwarf2_debug_info_t* di) 1906 { 1907 struct attribute name; 1908 unsigned long low_pc, high_pc; 1909 struct attribute is_decl; 1910 struct attribute inline_flags; 1911 struct symt* ret_type; 1912 struct symt_function_signature* sig_type; 1913 dwarf2_subprogram_t subpgm; 1914 struct vector* children; 1915 dwarf2_debug_info_t* child; 1916 unsigned int i; 1917 1918 if (di->symt) return di->symt; 1919 1920 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 1921 1922 if (!dwarf2_find_attribute(ctx, di, DW_AT_name, &name)) 1923 { 1924 WARN("No name for function... dropping function\n"); 1925 return NULL; 1926 } 1927 /* if it's an abstract representation of an inline function, there should be 1928 * a concrete object that we'll handle 1929 */ 1930 if (dwarf2_find_attribute(ctx, di, DW_AT_inline, &inline_flags) && 1931 inline_flags.u.uvalue != DW_INL_not_inlined) 1932 { 1933 TRACE("Function %s declared as inlined (%ld)... skipping\n", 1934 debugstr_a(name.u.string), inline_flags.u.uvalue); 1935 return NULL; 1936 } 1937 1938 if (dwarf2_find_attribute(ctx, di, DW_AT_declaration, &is_decl) && 1939 is_decl.u.uvalue && is_decl.gotten_from == attr_direct) 1940 { 1941 /* it's a real declaration, skip it */ 1942 return NULL; 1943 } 1944 if (!dwarf2_read_range(ctx, di, &low_pc, &high_pc)) 1945 { 1946 WARN("cannot get range for %s\n", name.u.string); 1947 return NULL; 1948 } 1949 /* As functions (defined as inline assembly) get debug info with dwarf 1950 * (not the case for stabs), we just drop Wine's thunks here... 1951 * Actual thunks will be created in elf_module from the symbol table 1952 */ 1953 #ifndef DBGHELP_STATIC_LIB 1954 if (elf_is_in_thunk_area(ctx->load_offset + low_pc, ctx->thunks) >= 0) 1955 return NULL; 1956 #endif 1957 if (!(ret_type = dwarf2_lookup_type(ctx, di))) 1958 { 1959 ret_type = ctx->symt_cache[sc_void]; 1960 assert(ret_type); 1961 } 1962 /* FIXME: assuming C source code */ 1963 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); 1964 subpgm.func = symt_new_function(ctx->module, ctx->compiland, 1965 dwarf2_get_cpp_name(ctx, di, name.u.string), 1966 ctx->load_offset + low_pc, high_pc - low_pc, 1967 &sig_type->symt); 1968 di->symt = &subpgm.func->symt; 1969 subpgm.ctx = ctx; 1970 if (!dwarf2_compute_location_attr(ctx, di, DW_AT_frame_base, 1971 &subpgm.frame, NULL)) 1972 { 1973 /* on stack !! */ 1974 subpgm.frame.kind = loc_regrel; 1975 subpgm.frame.reg = dbghelp_current_cpu->frame_regno; 1976 subpgm.frame.offset = 0; 1977 } 1978 subpgm.non_computed_variable = FALSE; 1979 1980 children = dwarf2_get_di_children(ctx, di); 1981 if (children) for (i = 0; i < vector_length(children); i++) 1982 { 1983 child = *(dwarf2_debug_info_t**)vector_at(children, i); 1984 1985 switch (child->abbrev->tag) 1986 { 1987 case DW_TAG_variable: 1988 case DW_TAG_formal_parameter: 1989 dwarf2_parse_variable(&subpgm, NULL, child); 1990 break; 1991 case DW_TAG_lexical_block: 1992 dwarf2_parse_subprogram_block(&subpgm, NULL, child); 1993 break; 1994 case DW_TAG_inlined_subroutine: 1995 dwarf2_parse_inlined_subroutine(&subpgm, NULL, child); 1996 break; 1997 case DW_TAG_pointer_type: 1998 dwarf2_parse_pointer_type(subpgm.ctx, di); 1999 break; 2000 case DW_TAG_const_type: 2001 dwarf2_parse_const_type(subpgm.ctx, di); 2002 break; 2003 case DW_TAG_subprogram: 2004 /* FIXME: likely a declaration (to be checked) 2005 * skip it for now 2006 */ 2007 break; 2008 case DW_TAG_label: 2009 dwarf2_parse_subprogram_label(&subpgm, child); 2010 break; 2011 case DW_TAG_class_type: 2012 case DW_TAG_structure_type: 2013 case DW_TAG_union_type: 2014 case DW_TAG_enumeration_type: 2015 case DW_TAG_typedef: 2016 /* the type referred to will be loaded when we need it, so skip it */ 2017 break; 2018 case DW_TAG_unspecified_parameters: 2019 case DW_TAG_template_type_param: 2020 case DW_TAG_template_value_param: 2021 case DW_TAG_GNU_call_site: 2022 case DW_TAG_GNU_template_parameter_pack: 2023 case DW_TAG_GNU_formal_parameter_pack: 2024 /* FIXME: no support in dbghelp's internals so far */ 2025 break; 2026 default: 2027 FIXME("Unhandled Tag type 0x%lx at %s, for %s\n", 2028 child->abbrev->tag, dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2029 } 2030 } 2031 2032 if (subpgm.non_computed_variable || subpgm.frame.kind >= loc_user) 2033 { 2034 symt_add_function_point(ctx->module, subpgm.func, SymTagCustom, 2035 &subpgm.frame, NULL); 2036 } 2037 if (subpgm.func) symt_normalize_function(subpgm.ctx->module, subpgm.func); 2038 2039 return di->symt; 2040 } 2041 2042 static struct symt* dwarf2_parse_subroutine_type(dwarf2_parse_context_t* ctx, 2043 dwarf2_debug_info_t* di) 2044 { 2045 struct symt* ret_type; 2046 struct symt_function_signature* sig_type; 2047 struct vector* children; 2048 dwarf2_debug_info_t* child; 2049 unsigned int i; 2050 2051 if (di->symt) return di->symt; 2052 2053 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2054 2055 if (!(ret_type = dwarf2_lookup_type(ctx, di))) 2056 { 2057 ret_type = ctx->symt_cache[sc_void]; 2058 assert(ret_type); 2059 } 2060 2061 /* FIXME: assuming C source code */ 2062 sig_type = symt_new_function_signature(ctx->module, ret_type, CV_CALL_FAR_C); 2063 2064 children = dwarf2_get_di_children(ctx, di); 2065 if (children) for (i = 0; i < vector_length(children); i++) 2066 { 2067 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2068 2069 switch (child->abbrev->tag) 2070 { 2071 case DW_TAG_formal_parameter: 2072 symt_add_function_signature_parameter(ctx->module, sig_type, 2073 dwarf2_lookup_type(ctx, child)); 2074 break; 2075 case DW_TAG_unspecified_parameters: 2076 WARN("Unsupported unspecified parameters\n"); 2077 break; 2078 } 2079 } 2080 2081 return di->symt = &sig_type->symt; 2082 } 2083 2084 static void dwarf2_parse_namespace(dwarf2_parse_context_t* ctx, 2085 dwarf2_debug_info_t* di) 2086 { 2087 struct vector* children; 2088 dwarf2_debug_info_t* child; 2089 unsigned int i; 2090 2091 if (di->symt) return; 2092 2093 TRACE("%s, for %s\n", dwarf2_debug_ctx(ctx), dwarf2_debug_di(di)); 2094 2095 di->symt = ctx->symt_cache[sc_void]; 2096 2097 children = dwarf2_get_di_children(ctx, di); 2098 if (children) for (i = 0; i < vector_length(children); i++) 2099 { 2100 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2101 dwarf2_load_one_entry(ctx, child); 2102 } 2103 } 2104 2105 static void dwarf2_load_one_entry(dwarf2_parse_context_t* ctx, 2106 dwarf2_debug_info_t* di) 2107 { 2108 switch (di->abbrev->tag) 2109 { 2110 case DW_TAG_typedef: 2111 dwarf2_parse_typedef(ctx, di); 2112 break; 2113 case DW_TAG_base_type: 2114 dwarf2_parse_base_type(ctx, di); 2115 break; 2116 case DW_TAG_pointer_type: 2117 dwarf2_parse_pointer_type(ctx, di); 2118 break; 2119 case DW_TAG_class_type: 2120 dwarf2_parse_udt_type(ctx, di, UdtClass); 2121 break; 2122 case DW_TAG_structure_type: 2123 dwarf2_parse_udt_type(ctx, di, UdtStruct); 2124 break; 2125 case DW_TAG_union_type: 2126 dwarf2_parse_udt_type(ctx, di, UdtUnion); 2127 break; 2128 case DW_TAG_array_type: 2129 dwarf2_parse_array_type(ctx, di); 2130 break; 2131 case DW_TAG_const_type: 2132 dwarf2_parse_const_type(ctx, di); 2133 break; 2134 case DW_TAG_volatile_type: 2135 dwarf2_parse_volatile_type(ctx, di); 2136 break; 2137 case DW_TAG_unspecified_type: 2138 dwarf2_parse_unspecified_type(ctx, di); 2139 break; 2140 case DW_TAG_reference_type: 2141 dwarf2_parse_reference_type(ctx, di); 2142 break; 2143 case DW_TAG_enumeration_type: 2144 dwarf2_parse_enumeration_type(ctx, di); 2145 break; 2146 case DW_TAG_subprogram: 2147 dwarf2_parse_subprogram(ctx, di); 2148 break; 2149 case DW_TAG_subroutine_type: 2150 dwarf2_parse_subroutine_type(ctx, di); 2151 break; 2152 case DW_TAG_variable: 2153 { 2154 dwarf2_subprogram_t subpgm; 2155 2156 subpgm.ctx = ctx; 2157 subpgm.func = NULL; 2158 subpgm.frame.kind = loc_absolute; 2159 subpgm.frame.offset = 0; 2160 subpgm.frame.reg = Wine_DW_no_register; 2161 dwarf2_parse_variable(&subpgm, NULL, di); 2162 } 2163 break; 2164 case DW_TAG_namespace: 2165 dwarf2_parse_namespace(ctx, di); 2166 break; 2167 /* silence a couple of C++ defines */ 2168 case DW_TAG_imported_module: 2169 case DW_TAG_imported_declaration: 2170 case DW_TAG_ptr_to_member_type: 2171 break; 2172 default: 2173 FIXME("Unhandled Tag type 0x%lx at %s, for %lu\n", 2174 di->abbrev->tag, dwarf2_debug_ctx(ctx), di->abbrev->entry_code); 2175 } 2176 } 2177 2178 static void dwarf2_set_line_number(struct module* module, unsigned long address, 2179 const struct vector* v, unsigned file, unsigned line) 2180 { 2181 struct symt_function* func; 2182 struct symt_ht* symt; 2183 unsigned* psrc; 2184 2185 if (!file || !(psrc = vector_at(v, file - 1))) return; 2186 2187 TRACE("%s %lx %s %u\n", 2188 debugstr_w(module->module.ModuleName), address, source_get(module, *psrc), line); 2189 if (!(symt = symt_find_nearest(module, address)) || 2190 symt->symt.tag != SymTagFunction) return; 2191 func = (struct symt_function*)symt; 2192 symt_add_func_line(module, func, *psrc, line, address - func->address); 2193 } 2194 2195 static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections, 2196 dwarf2_parse_context_t* ctx, 2197 const char* compile_dir, 2198 unsigned long offset) 2199 { 2200 dwarf2_traverse_context_t traverse; 2201 unsigned long length; 2202 unsigned insn_size, default_stmt; 2203 unsigned line_range, opcode_base; 2204 int line_base; 2205 const unsigned char* opcode_len; 2206 struct vector dirs; 2207 struct vector files; 2208 const char** p; 2209 2210 /* section with line numbers stripped */ 2211 if (sections[section_line].address == IMAGE_NO_MAP) 2212 return FALSE; 2213 2214 if (offset + 4 > sections[section_line].size) 2215 { 2216 WARN("out of bounds offset\n"); 2217 return FALSE; 2218 } 2219 traverse.data = sections[section_line].address + offset; 2220 traverse.end_data = traverse.data + 4; 2221 traverse.word_size = ctx->module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 2222 2223 length = dwarf2_parse_u4(&traverse); 2224 traverse.end_data = sections[section_line].address + offset + length; 2225 2226 if (offset + 4 + length > sections[section_line].size) 2227 { 2228 WARN("out of bounds header\n"); 2229 return FALSE; 2230 } 2231 dwarf2_parse_u2(&traverse); /* version */ 2232 dwarf2_parse_u4(&traverse); /* header_len */ 2233 insn_size = dwarf2_parse_byte(&traverse); 2234 default_stmt = dwarf2_parse_byte(&traverse); 2235 line_base = (signed char)dwarf2_parse_byte(&traverse); 2236 line_range = dwarf2_parse_byte(&traverse); 2237 opcode_base = dwarf2_parse_byte(&traverse); 2238 2239 opcode_len = traverse.data; 2240 traverse.data += opcode_base - 1; 2241 2242 vector_init(&dirs, sizeof(const char*), 4); 2243 p = vector_add(&dirs, &ctx->pool); 2244 *p = compile_dir ? compile_dir : "."; 2245 while (*traverse.data) 2246 { 2247 const char* rel = (const char*)traverse.data; 2248 unsigned rellen = strlen(rel); 2249 TRACE("Got include %s\n", rel); 2250 traverse.data += rellen + 1; 2251 p = vector_add(&dirs, &ctx->pool); 2252 2253 if (*rel == '/' || !compile_dir) 2254 *p = rel; 2255 else 2256 { 2257 /* include directory relative to compile directory */ 2258 unsigned baselen = strlen(compile_dir); 2259 char* tmp = pool_alloc(&ctx->pool, baselen + 1 + rellen + 1); 2260 strcpy(tmp, compile_dir); 2261 if (tmp[baselen - 1] != '/') tmp[baselen++] = '/'; 2262 strcpy(&tmp[baselen], rel); 2263 *p = tmp; 2264 } 2265 2266 } 2267 traverse.data++; 2268 2269 vector_init(&files, sizeof(unsigned), 16); 2270 while (*traverse.data) 2271 { 2272 unsigned int dir_index, mod_time; 2273 const char* name; 2274 const char* dir; 2275 unsigned* psrc; 2276 2277 name = (const char*)traverse.data; 2278 traverse.data += strlen(name) + 1; 2279 dir_index = dwarf2_leb128_as_unsigned(&traverse); 2280 mod_time = dwarf2_leb128_as_unsigned(&traverse); 2281 length = dwarf2_leb128_as_unsigned(&traverse); 2282 dir = *(const char**)vector_at(&dirs, dir_index); 2283 TRACE("Got file %s/%s (%u,%lu)\n", dir, name, mod_time, length); 2284 psrc = vector_add(&files, &ctx->pool); 2285 *psrc = source_new(ctx->module, dir, name); 2286 } 2287 traverse.data++; 2288 2289 while (traverse.data < traverse.end_data) 2290 { 2291 unsigned long address = 0; 2292 unsigned file = 1; 2293 unsigned line = 1; 2294 unsigned is_stmt = default_stmt; 2295 BOOL end_sequence = FALSE; 2296 unsigned opcode, extopcode, i; 2297 2298 while (!end_sequence) 2299 { 2300 opcode = dwarf2_parse_byte(&traverse); 2301 TRACE("Got opcode %x\n", opcode); 2302 2303 if (opcode >= opcode_base) 2304 { 2305 unsigned delta = opcode - opcode_base; 2306 2307 address += (delta / line_range) * insn_size; 2308 line += line_base + (delta % line_range); 2309 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2310 } 2311 else 2312 { 2313 switch (opcode) 2314 { 2315 case DW_LNS_copy: 2316 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2317 break; 2318 case DW_LNS_advance_pc: 2319 address += insn_size * dwarf2_leb128_as_unsigned(&traverse); 2320 break; 2321 case DW_LNS_advance_line: 2322 line += dwarf2_leb128_as_signed(&traverse); 2323 break; 2324 case DW_LNS_set_file: 2325 file = dwarf2_leb128_as_unsigned(&traverse); 2326 break; 2327 case DW_LNS_set_column: 2328 dwarf2_leb128_as_unsigned(&traverse); 2329 break; 2330 case DW_LNS_negate_stmt: 2331 is_stmt = !is_stmt; 2332 break; 2333 case DW_LNS_set_basic_block: 2334 break; 2335 case DW_LNS_const_add_pc: 2336 address += ((255 - opcode_base) / line_range) * insn_size; 2337 break; 2338 case DW_LNS_fixed_advance_pc: 2339 address += dwarf2_parse_u2(&traverse); 2340 break; 2341 case DW_LNS_extended_op: 2342 dwarf2_leb128_as_unsigned(&traverse); 2343 extopcode = dwarf2_parse_byte(&traverse); 2344 switch (extopcode) 2345 { 2346 case DW_LNE_end_sequence: 2347 dwarf2_set_line_number(ctx->module, address, &files, file, line); 2348 end_sequence = TRUE; 2349 break; 2350 case DW_LNE_set_address: 2351 address = ctx->load_offset + dwarf2_parse_addr(&traverse); 2352 break; 2353 case DW_LNE_define_file: 2354 FIXME("not handled define file %s\n", traverse.data); 2355 traverse.data += strlen((const char *)traverse.data) + 1; 2356 dwarf2_leb128_as_unsigned(&traverse); 2357 dwarf2_leb128_as_unsigned(&traverse); 2358 dwarf2_leb128_as_unsigned(&traverse); 2359 break; 2360 case DW_LNE_set_discriminator: 2361 { 2362 unsigned descr; 2363 2364 descr = dwarf2_leb128_as_unsigned(&traverse); 2365 WARN("not handled discriminator %x\n", descr); 2366 } 2367 break; 2368 default: 2369 FIXME("Unsupported extended opcode %x\n", extopcode); 2370 break; 2371 } 2372 break; 2373 default: 2374 WARN("Unsupported opcode %x\n", opcode); 2375 for (i = 0; i < opcode_len[opcode]; i++) 2376 dwarf2_leb128_as_unsigned(&traverse); 2377 break; 2378 } 2379 } 2380 } 2381 } 2382 return TRUE; 2383 } 2384 2385 static BOOL dwarf2_parse_compilation_unit(const dwarf2_section_t* sections, 2386 struct module* module, 2387 const struct elf_thunk_area* thunks, 2388 dwarf2_traverse_context_t* mod_ctx, 2389 unsigned long load_offset) 2390 { 2391 dwarf2_parse_context_t ctx; 2392 dwarf2_traverse_context_t abbrev_ctx; 2393 dwarf2_debug_info_t* di; 2394 dwarf2_traverse_context_t cu_ctx; 2395 const unsigned char* comp_unit_start = mod_ctx->data; 2396 unsigned long cu_length; 2397 unsigned short cu_version; 2398 unsigned long cu_abbrev_offset; 2399 BOOL ret = FALSE; 2400 2401 cu_length = dwarf2_parse_u4(mod_ctx); 2402 cu_ctx.data = mod_ctx->data; 2403 cu_ctx.end_data = mod_ctx->data + cu_length; 2404 mod_ctx->data += cu_length; 2405 cu_version = dwarf2_parse_u2(&cu_ctx); 2406 cu_abbrev_offset = dwarf2_parse_u4(&cu_ctx); 2407 cu_ctx.word_size = dwarf2_parse_byte(&cu_ctx); 2408 2409 TRACE("Compilation Unit Header found at 0x%x:\n", 2410 (int)(comp_unit_start - sections[section_debug].address)); 2411 TRACE("- length: %lu\n", cu_length); 2412 TRACE("- version: %u\n", cu_version); 2413 TRACE("- abbrev_offset: %lu\n", cu_abbrev_offset); 2414 TRACE("- word_size: %u\n", cu_ctx.word_size); 2415 2416 if (cu_version != 2) 2417 { 2418 WARN("%u DWARF version unsupported. Wine dbghelp only support DWARF 2.\n", 2419 cu_version); 2420 return FALSE; 2421 } 2422 2423 module->format_info[DFI_DWARF]->u.dwarf2_info->word_size = cu_ctx.word_size; 2424 mod_ctx->word_size = cu_ctx.word_size; 2425 2426 pool_init(&ctx.pool, 65536); 2427 ctx.sections = sections; 2428 ctx.section = section_debug; 2429 ctx.module = module; 2430 ctx.thunks = thunks; 2431 ctx.load_offset = load_offset; 2432 ctx.ref_offset = comp_unit_start - sections[section_debug].address; 2433 memset(ctx.symt_cache, 0, sizeof(ctx.symt_cache)); 2434 ctx.symt_cache[sc_void] = &symt_new_basic(module, btVoid, "void", 0)->symt; 2435 ctx.cpp_name = NULL; 2436 2437 abbrev_ctx.data = sections[section_abbrev].address + cu_abbrev_offset; 2438 abbrev_ctx.end_data = sections[section_abbrev].address + sections[section_abbrev].size; 2439 abbrev_ctx.word_size = cu_ctx.word_size; 2440 dwarf2_parse_abbrev_set(&abbrev_ctx, &ctx.abbrev_table, &ctx.pool); 2441 2442 sparse_array_init(&ctx.debug_info_table, sizeof(dwarf2_debug_info_t), 128); 2443 dwarf2_read_one_debug_info(&ctx, &cu_ctx, NULL, &di); 2444 2445 if (di->abbrev->tag == DW_TAG_compile_unit) 2446 { 2447 struct attribute name; 2448 struct vector* children; 2449 dwarf2_debug_info_t* child = NULL; 2450 unsigned int i; 2451 struct attribute stmt_list, low_pc; 2452 struct attribute comp_dir; 2453 2454 if (!dwarf2_find_attribute(&ctx, di, DW_AT_name, &name)) 2455 name.u.string = NULL; 2456 2457 /* get working directory of current compilation unit */ 2458 if (!dwarf2_find_attribute(&ctx, di, DW_AT_comp_dir, &comp_dir)) 2459 comp_dir.u.string = NULL; 2460 2461 if (!dwarf2_find_attribute(&ctx, di, DW_AT_low_pc, &low_pc)) 2462 low_pc.u.uvalue = 0; 2463 ctx.compiland = symt_new_compiland(module, ctx.load_offset + low_pc.u.uvalue, 2464 source_new(module, comp_dir.u.string, name.u.string)); 2465 di->symt = &ctx.compiland->symt; 2466 children = dwarf2_get_di_children(&ctx, di); 2467 if (children) for (i = 0; i < vector_length(children); i++) 2468 { 2469 child = *(dwarf2_debug_info_t**)vector_at(children, i); 2470 dwarf2_load_one_entry(&ctx, child); 2471 } 2472 if (dwarf2_find_attribute(&ctx, di, DW_AT_stmt_list, &stmt_list)) 2473 { 2474 #if defined(__REACTOS__) && defined(__clang__) 2475 unsigned long stmt_list_val = stmt_list.u.uvalue; 2476 if (stmt_list_val > module->module.BaseOfImage) 2477 { 2478 /* FIXME: Clang is recording this as an address, not an offset */ 2479 stmt_list_val -= module->module.BaseOfImage + sections[section_line].rva; 2480 } 2481 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list_val)) 2482 #else 2483 if (dwarf2_parse_line_numbers(sections, &ctx, comp_dir.u.string, stmt_list.u.uvalue)) 2484 #endif 2485 module->module.LineNumbers = TRUE; 2486 } 2487 ret = TRUE; 2488 } 2489 else FIXME("Should have a compilation unit here\n"); 2490 pool_destroy(&ctx.pool); 2491 return ret; 2492 } 2493 2494 static BOOL dwarf2_lookup_loclist(const struct module_format* modfmt, const BYTE* start, 2495 unsigned long ip, dwarf2_traverse_context_t* lctx) 2496 { 2497 DWORD_PTR beg, end; 2498 const BYTE* ptr = start; 2499 DWORD len; 2500 2501 while (ptr < modfmt->u.dwarf2_info->debug_loc.address + modfmt->u.dwarf2_info->debug_loc.size) 2502 { 2503 beg = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size; 2504 end = dwarf2_get_addr(ptr, modfmt->u.dwarf2_info->word_size); ptr += modfmt->u.dwarf2_info->word_size; 2505 if (!beg && !end) break; 2506 len = dwarf2_get_u2(ptr); ptr += 2; 2507 2508 if (beg <= ip && ip < end) 2509 { 2510 lctx->data = ptr; 2511 lctx->end_data = ptr + len; 2512 lctx->word_size = modfmt->u.dwarf2_info->word_size; 2513 return TRUE; 2514 } 2515 ptr += len; 2516 } 2517 WARN("Couldn't find ip in location list\n"); 2518 return FALSE; 2519 } 2520 2521 static enum location_error loc_compute_frame(struct process* pcs, 2522 const struct module_format* modfmt, 2523 const struct symt_function* func, 2524 DWORD_PTR ip, struct location* frame) 2525 { 2526 struct symt** psym = NULL; 2527 struct location* pframe; 2528 dwarf2_traverse_context_t lctx; 2529 enum location_error err; 2530 unsigned int i; 2531 2532 for (i=0; i<vector_length(&func->vchildren); i++) 2533 { 2534 psym = vector_at(&func->vchildren, i); 2535 if ((*psym)->tag == SymTagCustom) 2536 { 2537 pframe = &((struct symt_hierarchy_point*)*psym)->loc; 2538 2539 /* First, recompute the frame information, if needed */ 2540 switch (pframe->kind) 2541 { 2542 case loc_regrel: 2543 case loc_register: 2544 *frame = *pframe; 2545 break; 2546 case loc_dwarf2_location_list: 2547 WARN("Searching loclist for %s\n", func->hash_elt.name); 2548 if (!dwarf2_lookup_loclist(modfmt, 2549 modfmt->u.dwarf2_info->debug_loc.address + pframe->offset, 2550 ip, &lctx)) 2551 return loc_err_out_of_scope; 2552 if ((err = compute_location(&lctx, frame, pcs->handle, NULL)) < 0) return err; 2553 if (frame->kind >= loc_user) 2554 { 2555 WARN("Couldn't compute runtime frame location\n"); 2556 return loc_err_too_complex; 2557 } 2558 break; 2559 default: 2560 WARN("Unsupported frame kind %d\n", pframe->kind); 2561 return loc_err_internal; 2562 } 2563 return 0; 2564 } 2565 } 2566 WARN("Couldn't find Custom function point, whilst location list offset is searched\n"); 2567 return loc_err_internal; 2568 } 2569 2570 enum reg_rule 2571 { 2572 RULE_UNSET, /* not set at all */ 2573 RULE_UNDEFINED, /* undefined value */ 2574 RULE_SAME, /* same value as previous frame */ 2575 RULE_CFA_OFFSET, /* stored at cfa offset */ 2576 RULE_OTHER_REG, /* stored in other register */ 2577 RULE_EXPRESSION, /* address specified by expression */ 2578 RULE_VAL_EXPRESSION /* value specified by expression */ 2579 }; 2580 2581 /* make it large enough for all CPUs */ 2582 #define NB_FRAME_REGS 64 2583 #define MAX_SAVED_STATES 16 2584 2585 struct frame_state 2586 { 2587 ULONG_PTR cfa_offset; 2588 unsigned char cfa_reg; 2589 enum reg_rule cfa_rule; 2590 enum reg_rule rules[NB_FRAME_REGS]; 2591 ULONG_PTR regs[NB_FRAME_REGS]; 2592 }; 2593 2594 struct frame_info 2595 { 2596 ULONG_PTR ip; 2597 ULONG_PTR code_align; 2598 LONG_PTR data_align; 2599 unsigned char retaddr_reg; 2600 unsigned char fde_encoding; 2601 unsigned char lsda_encoding; 2602 unsigned char signal_frame; 2603 unsigned char aug_z_format; 2604 unsigned char state_sp; 2605 struct frame_state state; 2606 struct frame_state state_stack[MAX_SAVED_STATES]; 2607 }; 2608 2609 static ULONG_PTR dwarf2_parse_augmentation_ptr(dwarf2_traverse_context_t* ctx, unsigned char encoding) 2610 { 2611 ULONG_PTR base; 2612 2613 if (encoding == DW_EH_PE_omit) return 0; 2614 2615 switch (encoding & 0xf0) 2616 { 2617 case DW_EH_PE_abs: 2618 base = 0; 2619 break; 2620 case DW_EH_PE_pcrel: 2621 base = (ULONG_PTR)ctx->data; 2622 break; 2623 default: 2624 FIXME("unsupported encoding %02x\n", encoding); 2625 return 0; 2626 } 2627 2628 switch (encoding & 0x0f) 2629 { 2630 case DW_EH_PE_native: 2631 return base + dwarf2_parse_addr(ctx); 2632 case DW_EH_PE_leb128: 2633 return base + dwarf2_leb128_as_unsigned(ctx); 2634 case DW_EH_PE_data2: 2635 return base + dwarf2_parse_u2(ctx); 2636 case DW_EH_PE_data4: 2637 return base + dwarf2_parse_u4(ctx); 2638 case DW_EH_PE_data8: 2639 return base + dwarf2_parse_u8(ctx); 2640 case DW_EH_PE_signed|DW_EH_PE_leb128: 2641 return base + dwarf2_leb128_as_signed(ctx); 2642 case DW_EH_PE_signed|DW_EH_PE_data2: 2643 return base + (signed short)dwarf2_parse_u2(ctx); 2644 case DW_EH_PE_signed|DW_EH_PE_data4: 2645 return base + (signed int)dwarf2_parse_u4(ctx); 2646 case DW_EH_PE_signed|DW_EH_PE_data8: 2647 return base + (LONG64)dwarf2_parse_u8(ctx); 2648 default: 2649 FIXME("unsupported encoding %02x\n", encoding); 2650 return 0; 2651 } 2652 } 2653 2654 static BOOL parse_cie_details(dwarf2_traverse_context_t* ctx, struct frame_info* info) 2655 { 2656 unsigned char version; 2657 const char* augmentation; 2658 const unsigned char* end; 2659 ULONG_PTR len; 2660 2661 memset(info, 0, sizeof(*info)); 2662 info->lsda_encoding = DW_EH_PE_omit; 2663 info->aug_z_format = 0; 2664 2665 /* parse the CIE first */ 2666 version = dwarf2_parse_byte(ctx); 2667 if (version != 1 && version != 3 && version != 4) 2668 { 2669 FIXME("unknown CIE version %u at %p\n", version, ctx->data - 1); 2670 return FALSE; 2671 } 2672 augmentation = (const char*)ctx->data; 2673 ctx->data += strlen(augmentation) + 1; 2674 2675 switch (version) 2676 { 2677 case 4: 2678 /* skip 'address_size' and 'segment_size' */ 2679 ctx->data += 2; 2680 /* fallthrough */ 2681 case 1: 2682 case 3: 2683 info->code_align = dwarf2_leb128_as_unsigned(ctx); 2684 info->data_align = dwarf2_leb128_as_signed(ctx); 2685 info->retaddr_reg = version == 1 ? dwarf2_parse_byte(ctx) :dwarf2_leb128_as_unsigned(ctx); 2686 break; 2687 default: 2688 ; 2689 } 2690 info->state.cfa_rule = RULE_CFA_OFFSET; 2691 2692 end = NULL; 2693 TRACE("\tparsing augmentation %s\n", augmentation); 2694 if (*augmentation) do 2695 { 2696 switch (*augmentation) 2697 { 2698 case 'z': 2699 len = dwarf2_leb128_as_unsigned(ctx); 2700 end = ctx->data + len; 2701 info->aug_z_format = 1; 2702 continue; 2703 case 'L': 2704 info->lsda_encoding = dwarf2_parse_byte(ctx); 2705 continue; 2706 case 'P': 2707 { 2708 unsigned char encoding = dwarf2_parse_byte(ctx); 2709 /* throw away the indirect bit, as we don't care for the result */ 2710 encoding &= ~DW_EH_PE_indirect; 2711 dwarf2_parse_augmentation_ptr(ctx, encoding); /* handler */ 2712 continue; 2713 } 2714 case 'R': 2715 info->fde_encoding = dwarf2_parse_byte(ctx); 2716 continue; 2717 case 'S': 2718 info->signal_frame = 1; 2719 continue; 2720 } 2721 FIXME("unknown augmentation '%c'\n", *augmentation); 2722 if (!end) return FALSE; 2723 break; 2724 } while (*++augmentation); 2725 if (end) ctx->data = end; 2726 return TRUE; 2727 } 2728 2729 static BOOL dwarf2_get_cie(unsigned long addr, struct module* module, DWORD_PTR delta, 2730 dwarf2_traverse_context_t* fde_ctx, dwarf2_traverse_context_t* cie_ctx, 2731 struct frame_info* info, BOOL in_eh_frame) 2732 { 2733 const unsigned char* ptr_blk; 2734 const unsigned char* cie_ptr; 2735 const unsigned char* last_cie_ptr = (const unsigned char*)~0; 2736 unsigned len, id; 2737 unsigned long start, range; 2738 unsigned cie_id; 2739 const BYTE* start_data = fde_ctx->data; 2740 2741 cie_id = in_eh_frame ? 0 : DW_CIE_ID; 2742 /* skip 0-padding at beginning of section (alignment) */ 2743 while (fde_ctx->data + 2 * 4 < fde_ctx->end_data) 2744 { 2745 if (dwarf2_parse_u4(fde_ctx)) 2746 { 2747 fde_ctx->data -= 4; 2748 break; 2749 } 2750 } 2751 for (; fde_ctx->data + 2 * 4 < fde_ctx->end_data; fde_ctx->data = ptr_blk) 2752 { 2753 /* find the FDE for address addr (skip CIE) */ 2754 len = dwarf2_parse_u4(fde_ctx); 2755 if (len == 0xffffffff) FIXME("Unsupported yet 64-bit CIEs\n"); 2756 ptr_blk = fde_ctx->data + len; 2757 id = dwarf2_parse_u4(fde_ctx); 2758 if (id == cie_id) 2759 { 2760 last_cie_ptr = fde_ctx->data - 8; 2761 /* we need some bits out of the CIE in order to parse all contents */ 2762 if (!parse_cie_details(fde_ctx, info)) return FALSE; 2763 cie_ctx->data = fde_ctx->data; 2764 cie_ctx->end_data = ptr_blk; 2765 cie_ctx->word_size = fde_ctx->word_size; 2766 continue; 2767 } 2768 cie_ptr = (in_eh_frame) ? fde_ctx->data - id - 4 : start_data + id; 2769 if (cie_ptr != last_cie_ptr) 2770 { 2771 last_cie_ptr = cie_ptr; 2772 cie_ctx->data = cie_ptr; 2773 cie_ctx->word_size = fde_ctx->word_size; 2774 cie_ctx->end_data = cie_ptr + 4; 2775 cie_ctx->end_data = cie_ptr + 4 + dwarf2_parse_u4(cie_ctx); 2776 if (dwarf2_parse_u4(cie_ctx) != cie_id) 2777 { 2778 FIXME("wrong CIE pointer at %x from FDE %x\n", 2779 (unsigned)(cie_ptr - start_data), 2780 (unsigned)(fde_ctx->data - start_data)); 2781 return FALSE; 2782 } 2783 if (!parse_cie_details(cie_ctx, info)) return FALSE; 2784 } 2785 start = delta + dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding); 2786 range = dwarf2_parse_augmentation_ptr(fde_ctx, info->fde_encoding & 0x0F); 2787 2788 if (addr >= start && addr < start + range) 2789 { 2790 /* reset the FDE context */ 2791 fde_ctx->end_data = ptr_blk; 2792 2793 info->ip = start; 2794 return TRUE; 2795 } 2796 } 2797 return FALSE; 2798 } 2799 2800 static int valid_reg(ULONG_PTR reg) 2801 { 2802 if (reg >= NB_FRAME_REGS) FIXME("unsupported reg %lx\n", reg); 2803 return (reg < NB_FRAME_REGS); 2804 } 2805 2806 static void execute_cfa_instructions(dwarf2_traverse_context_t* ctx, 2807 ULONG_PTR last_ip, struct frame_info *info) 2808 { 2809 while (ctx->data < ctx->end_data && info->ip <= last_ip + info->signal_frame) 2810 { 2811 enum dwarf_call_frame_info op = dwarf2_parse_byte(ctx); 2812 2813 if (op & 0xc0) 2814 { 2815 switch (op & 0xc0) 2816 { 2817 case DW_CFA_advance_loc: 2818 { 2819 ULONG_PTR offset = (op & 0x3f) * info->code_align; 2820 TRACE("%lx: DW_CFA_advance_loc %lu\n", info->ip, offset); 2821 info->ip += offset; 2822 break; 2823 } 2824 case DW_CFA_offset: 2825 { 2826 ULONG_PTR reg = op & 0x3f; 2827 LONG_PTR offset = dwarf2_leb128_as_unsigned(ctx) * info->data_align; 2828 if (!valid_reg(reg)) break; 2829 TRACE("%lx: DW_CFA_offset %s, %ld\n", 2830 info->ip, 2831 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2832 offset); 2833 info->state.regs[reg] = offset; 2834 info->state.rules[reg] = RULE_CFA_OFFSET; 2835 break; 2836 } 2837 case DW_CFA_restore: 2838 { 2839 ULONG_PTR reg = op & 0x3f; 2840 if (!valid_reg(reg)) break; 2841 TRACE("%lx: DW_CFA_restore %s\n", 2842 info->ip, 2843 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2844 info->state.rules[reg] = RULE_UNSET; 2845 break; 2846 } 2847 } 2848 } 2849 else switch (op) 2850 { 2851 case DW_CFA_nop: 2852 break; 2853 case DW_CFA_set_loc: 2854 { 2855 ULONG_PTR loc = dwarf2_parse_augmentation_ptr(ctx, info->fde_encoding); 2856 TRACE("%lx: DW_CFA_set_loc %lx\n", info->ip, loc); 2857 info->ip = loc; 2858 break; 2859 } 2860 case DW_CFA_advance_loc1: 2861 { 2862 ULONG_PTR offset = dwarf2_parse_byte(ctx) * info->code_align; 2863 TRACE("%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset); 2864 info->ip += offset; 2865 break; 2866 } 2867 case DW_CFA_advance_loc2: 2868 { 2869 ULONG_PTR offset = dwarf2_parse_u2(ctx) * info->code_align; 2870 TRACE("%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset); 2871 info->ip += offset; 2872 break; 2873 } 2874 case DW_CFA_advance_loc4: 2875 { 2876 ULONG_PTR offset = dwarf2_parse_u4(ctx) * info->code_align; 2877 TRACE("%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset); 2878 info->ip += offset; 2879 break; 2880 } 2881 case DW_CFA_offset_extended: 2882 case DW_CFA_offset_extended_sf: 2883 { 2884 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2885 LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf2_leb128_as_unsigned(ctx) * info->data_align 2886 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2887 if (!valid_reg(reg)) break; 2888 TRACE("%lx: DW_CFA_offset_extended %s, %ld\n", 2889 info->ip, 2890 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2891 offset); 2892 info->state.regs[reg] = offset; 2893 info->state.rules[reg] = RULE_CFA_OFFSET; 2894 break; 2895 } 2896 case DW_CFA_restore_extended: 2897 { 2898 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2899 if (!valid_reg(reg)) break; 2900 TRACE("%lx: DW_CFA_restore_extended %s\n", 2901 info->ip, 2902 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2903 info->state.rules[reg] = RULE_UNSET; 2904 break; 2905 } 2906 case DW_CFA_undefined: 2907 { 2908 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2909 if (!valid_reg(reg)) break; 2910 TRACE("%lx: DW_CFA_undefined %s\n", 2911 info->ip, 2912 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2913 info->state.rules[reg] = RULE_UNDEFINED; 2914 break; 2915 } 2916 case DW_CFA_same_value: 2917 { 2918 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2919 if (!valid_reg(reg)) break; 2920 TRACE("%lx: DW_CFA_same_value %s\n", 2921 info->ip, 2922 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2923 info->state.regs[reg] = reg; 2924 info->state.rules[reg] = RULE_SAME; 2925 break; 2926 } 2927 case DW_CFA_register: 2928 { 2929 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2930 ULONG_PTR reg2 = dwarf2_leb128_as_unsigned(ctx); 2931 if (!valid_reg(reg) || !valid_reg(reg2)) break; 2932 TRACE("%lx: DW_CFA_register %s == %s\n", 2933 info->ip, 2934 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2935 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg2, TRUE))); 2936 info->state.regs[reg] = reg2; 2937 info->state.rules[reg] = RULE_OTHER_REG; 2938 break; 2939 } 2940 case DW_CFA_remember_state: 2941 TRACE("%lx: DW_CFA_remember_state\n", info->ip); 2942 if (info->state_sp >= MAX_SAVED_STATES) 2943 FIXME("%lx: DW_CFA_remember_state too many nested saves\n", info->ip); 2944 else 2945 info->state_stack[info->state_sp++] = info->state; 2946 break; 2947 case DW_CFA_restore_state: 2948 TRACE("%lx: DW_CFA_restore_state\n", info->ip); 2949 if (!info->state_sp) 2950 FIXME("%lx: DW_CFA_restore_state without corresponding save\n", info->ip); 2951 else 2952 info->state = info->state_stack[--info->state_sp]; 2953 break; 2954 case DW_CFA_def_cfa: 2955 case DW_CFA_def_cfa_sf: 2956 { 2957 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2958 ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf2_leb128_as_unsigned(ctx) 2959 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2960 if (!valid_reg(reg)) break; 2961 TRACE("%lx: DW_CFA_def_cfa %s, %ld\n", 2962 info->ip, 2963 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 2964 offset); 2965 info->state.cfa_reg = reg; 2966 info->state.cfa_offset = offset; 2967 info->state.cfa_rule = RULE_CFA_OFFSET; 2968 break; 2969 } 2970 case DW_CFA_def_cfa_register: 2971 { 2972 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 2973 if (!valid_reg(reg)) break; 2974 TRACE("%lx: DW_CFA_def_cfa_register %s\n", 2975 info->ip, 2976 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE))); 2977 info->state.cfa_reg = reg; 2978 info->state.cfa_rule = RULE_CFA_OFFSET; 2979 break; 2980 } 2981 case DW_CFA_def_cfa_offset: 2982 case DW_CFA_def_cfa_offset_sf: 2983 { 2984 ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf2_leb128_as_unsigned(ctx) 2985 : dwarf2_leb128_as_signed(ctx) * info->data_align; 2986 TRACE("%lx: DW_CFA_def_cfa_offset %ld\n", info->ip, offset); 2987 info->state.cfa_offset = offset; 2988 info->state.cfa_rule = RULE_CFA_OFFSET; 2989 break; 2990 } 2991 case DW_CFA_def_cfa_expression: 2992 { 2993 ULONG_PTR expr = (ULONG_PTR)ctx->data; 2994 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx); 2995 TRACE("%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len); 2996 info->state.cfa_offset = expr; 2997 info->state.cfa_rule = RULE_VAL_EXPRESSION; 2998 ctx->data += len; 2999 break; 3000 } 3001 case DW_CFA_expression: 3002 case DW_CFA_val_expression: 3003 { 3004 ULONG_PTR reg = dwarf2_leb128_as_unsigned(ctx); 3005 ULONG_PTR expr = (ULONG_PTR)ctx->data; 3006 ULONG_PTR len = dwarf2_leb128_as_unsigned(ctx); 3007 if (!valid_reg(reg)) break; 3008 TRACE("%lx: DW_CFA_%sexpression %s %lx-%lx\n", 3009 info->ip, (op == DW_CFA_expression) ? "" : "val_", 3010 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(reg, TRUE)), 3011 expr, expr + len); 3012 info->state.regs[reg] = expr; 3013 info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION; 3014 ctx->data += len; 3015 break; 3016 } 3017 case DW_CFA_GNU_args_size: 3018 /* FIXME: should check that GCC is the compiler for this CU */ 3019 { 3020 ULONG_PTR args = dwarf2_leb128_as_unsigned(ctx); 3021 TRACE("%lx: DW_CFA_GNU_args_size %lu\n", info->ip, args); 3022 /* ignored */ 3023 break; 3024 } 3025 default: 3026 FIXME("%lx: unknown CFA opcode %02x\n", info->ip, op); 3027 break; 3028 } 3029 } 3030 } 3031 3032 /* retrieve a context register from its dwarf number */ 3033 static ULONG_PTR get_context_reg(CONTEXT *context, ULONG_PTR dw_reg) 3034 { 3035 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz; 3036 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz); 3037 3038 if (sz != sizeof(ULONG_PTR)) 3039 { 3040 FIXME("reading register %lu/%u of wrong size %u\n", dw_reg, regno, sz); 3041 return 0; 3042 } 3043 return *ptr; 3044 } 3045 3046 /* set a context register from its dwarf number */ 3047 static void set_context_reg(struct cpu_stack_walk* csw, CONTEXT *context, ULONG_PTR dw_reg, 3048 ULONG_PTR val, BOOL isdebuggee) 3049 { 3050 unsigned regno = dbghelp_current_cpu->map_dwarf_register(dw_reg, TRUE), sz; 3051 ULONG_PTR* ptr = dbghelp_current_cpu->fetch_context_reg(context, regno, &sz); 3052 3053 if (isdebuggee) 3054 { 3055 char tmp[16]; 3056 3057 if (sz > sizeof(tmp)) 3058 { 3059 FIXME("register %lu/%u size is too wide: %u\n", dw_reg, regno, sz); 3060 return; 3061 } 3062 if (!sw_read_mem(csw, val, tmp, sz)) 3063 { 3064 WARN("Couldn't read memory at %p\n", (void*)val); 3065 return; 3066 } 3067 memcpy(ptr, tmp, sz); 3068 } 3069 else 3070 { 3071 if (sz != sizeof(ULONG_PTR)) 3072 { 3073 FIXME("assigning to register %lu/%u of wrong size %u\n", dw_reg, regno, sz); 3074 return; 3075 } 3076 *ptr = val; 3077 } 3078 } 3079 3080 /* copy a register from one context to another using dwarf number */ 3081 static void copy_context_reg(CONTEXT *dstcontext, ULONG_PTR dwregdst, CONTEXT* srccontext, ULONG_PTR dwregsrc) 3082 { 3083 unsigned regdstno = dbghelp_current_cpu->map_dwarf_register(dwregdst, TRUE), szdst; 3084 unsigned regsrcno = dbghelp_current_cpu->map_dwarf_register(dwregsrc, TRUE), szsrc; 3085 ULONG_PTR* ptrdst = dbghelp_current_cpu->fetch_context_reg(dstcontext, regdstno, &szdst); 3086 ULONG_PTR* ptrsrc = dbghelp_current_cpu->fetch_context_reg(srccontext, regsrcno, &szsrc); 3087 3088 if (szdst != szsrc) 3089 { 3090 FIXME("Cannot copy register %lu/%u => %lu/%u because of size mismatch (%u => %u)\n", 3091 dwregsrc, regsrcno, dwregdst, regdstno, szsrc, szdst); 3092 return; 3093 } 3094 memcpy(ptrdst, ptrsrc, szdst); 3095 } 3096 3097 static ULONG_PTR eval_expression(const struct module* module, struct cpu_stack_walk* csw, 3098 const unsigned char* zp, CONTEXT *context) 3099 { 3100 dwarf2_traverse_context_t ctx; 3101 ULONG_PTR reg, sz, tmp, stack[64]; 3102 int sp = -1; 3103 ULONG_PTR len; 3104 3105 ctx.data = zp; 3106 ctx.end_data = zp + 4; 3107 len = dwarf2_leb128_as_unsigned(&ctx); 3108 ctx.end_data = ctx.data + len; 3109 ctx.word_size = module->format_info[DFI_DWARF]->u.dwarf2_info->word_size; 3110 3111 while (ctx.data < ctx.end_data) 3112 { 3113 unsigned char opcode = dwarf2_parse_byte(&ctx); 3114 3115 if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31) 3116 stack[++sp] = opcode - DW_OP_lit0; 3117 else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31) 3118 stack[++sp] = get_context_reg(context, opcode - DW_OP_reg0); 3119 else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31) 3120 stack[++sp] = get_context_reg(context, opcode - DW_OP_breg0) + dwarf2_leb128_as_signed(&ctx); 3121 else switch (opcode) 3122 { 3123 case DW_OP_nop: break; 3124 case DW_OP_addr: stack[++sp] = dwarf2_parse_addr(&ctx); break; 3125 case DW_OP_const1u: stack[++sp] = dwarf2_parse_byte(&ctx); break; 3126 case DW_OP_const1s: stack[++sp] = (signed char)dwarf2_parse_byte(&ctx); break; 3127 case DW_OP_const2u: stack[++sp] = dwarf2_parse_u2(&ctx); break; 3128 case DW_OP_const2s: stack[++sp] = (short)dwarf2_parse_u2(&ctx); break; 3129 case DW_OP_const4u: stack[++sp] = dwarf2_parse_u4(&ctx); break; 3130 case DW_OP_const4s: stack[++sp] = (signed int)dwarf2_parse_u4(&ctx); break; 3131 case DW_OP_const8u: stack[++sp] = dwarf2_parse_u8(&ctx); break; 3132 case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf2_parse_u8(&ctx); break; 3133 case DW_OP_constu: stack[++sp] = dwarf2_leb128_as_unsigned(&ctx); break; 3134 case DW_OP_consts: stack[++sp] = dwarf2_leb128_as_signed(&ctx); break; 3135 case DW_OP_deref: 3136 if (!sw_read_mem(csw, stack[sp], &tmp, sizeof(tmp))) 3137 { 3138 ERR("Couldn't read memory at %lx\n", stack[sp]); 3139 tmp = 0; 3140 } 3141 stack[sp] = tmp; 3142 break; 3143 case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break; 3144 case DW_OP_drop: sp--; break; 3145 case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break; 3146 case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf2_parse_byte(&ctx)]; sp++; break; 3147 case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break; 3148 case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break; 3149 case DW_OP_abs: stack[sp] = labs(stack[sp]); break; 3150 case DW_OP_neg: stack[sp] = -stack[sp]; break; 3151 case DW_OP_not: stack[sp] = ~stack[sp]; break; 3152 case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break; 3153 case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break; 3154 case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break; 3155 case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break; 3156 case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break; 3157 case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break; 3158 case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break; 3159 case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break; 3160 case DW_OP_plus_uconst: stack[sp] += dwarf2_leb128_as_unsigned(&ctx); break; 3161 case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break; 3162 case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break; 3163 case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break; 3164 case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break; 3165 case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break; 3166 case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break; 3167 case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break; 3168 case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break; 3169 case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break; 3170 case DW_OP_skip: tmp = (short)dwarf2_parse_u2(&ctx); ctx.data += tmp; break; 3171 case DW_OP_bra: tmp = (short)dwarf2_parse_u2(&ctx); if (!stack[sp--]) ctx.data += tmp; break; 3172 case DW_OP_GNU_encoded_addr: 3173 tmp = dwarf2_parse_byte(&ctx); 3174 stack[++sp] = dwarf2_parse_augmentation_ptr(&ctx, tmp); 3175 break; 3176 case DW_OP_regx: 3177 stack[++sp] = get_context_reg(context, dwarf2_leb128_as_unsigned(&ctx)); 3178 break; 3179 case DW_OP_bregx: 3180 reg = dwarf2_leb128_as_unsigned(&ctx); 3181 tmp = dwarf2_leb128_as_signed(&ctx); 3182 stack[++sp] = get_context_reg(context, reg) + tmp; 3183 break; 3184 case DW_OP_deref_size: 3185 sz = dwarf2_parse_byte(&ctx); 3186 if (!sw_read_mem(csw, stack[sp], &tmp, sz)) 3187 { 3188 ERR("Couldn't read memory at %lx\n", stack[sp]); 3189 tmp = 0; 3190 } 3191 /* do integral promotion */ 3192 switch (sz) 3193 { 3194 case 1: stack[sp] = *(unsigned char*)&tmp; break; 3195 case 2: stack[sp] = *(unsigned short*)&tmp; break; 3196 case 4: stack[sp] = *(unsigned int*)&tmp; break; 3197 case 8: stack[sp] = *(ULONG_PTR*)&tmp; break; /* FIXME: won't work on 32bit platform */ 3198 default: FIXME("Unknown size for deref 0x%lx\n", sz); 3199 } 3200 break; 3201 default: 3202 FIXME("unhandled opcode %02x\n", opcode); 3203 } 3204 } 3205 return stack[sp]; 3206 } 3207 3208 static void apply_frame_state(const struct module* module, struct cpu_stack_walk* csw, 3209 CONTEXT *context, struct frame_state *state, ULONG_PTR* cfa) 3210 { 3211 unsigned int i; 3212 ULONG_PTR value; 3213 CONTEXT new_context = *context; 3214 3215 switch (state->cfa_rule) 3216 { 3217 case RULE_EXPRESSION: 3218 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context); 3219 if (!sw_read_mem(csw, *cfa, cfa, sizeof(*cfa))) 3220 { 3221 WARN("Couldn't read memory at %p\n", (void*)*cfa); 3222 return; 3223 } 3224 break; 3225 case RULE_VAL_EXPRESSION: 3226 *cfa = eval_expression(module, csw, (const unsigned char*)state->cfa_offset, context); 3227 break; 3228 default: 3229 *cfa = get_context_reg(context, state->cfa_reg) + state->cfa_offset; 3230 break; 3231 } 3232 if (!*cfa) return; 3233 3234 for (i = 0; i < NB_FRAME_REGS; i++) 3235 { 3236 switch (state->rules[i]) 3237 { 3238 case RULE_UNSET: 3239 case RULE_UNDEFINED: 3240 case RULE_SAME: 3241 break; 3242 case RULE_CFA_OFFSET: 3243 set_context_reg(csw, &new_context, i, *cfa + state->regs[i], TRUE); 3244 break; 3245 case RULE_OTHER_REG: 3246 copy_context_reg(&new_context, i, context, state->regs[i]); 3247 break; 3248 case RULE_EXPRESSION: 3249 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context); 3250 set_context_reg(csw, &new_context, i, value, TRUE); 3251 break; 3252 case RULE_VAL_EXPRESSION: 3253 value = eval_expression(module, csw, (const unsigned char*)state->regs[i], context); 3254 set_context_reg(csw, &new_context, i, value, FALSE); 3255 break; 3256 } 3257 } 3258 *context = new_context; 3259 } 3260 3261 /*********************************************************************** 3262 * dwarf2_virtual_unwind 3263 * 3264 */ 3265 BOOL dwarf2_virtual_unwind(struct cpu_stack_walk* csw, ULONG_PTR ip, CONTEXT* context, ULONG_PTR* cfa) 3266 { 3267 struct module_pair pair; 3268 struct frame_info info; 3269 dwarf2_traverse_context_t cie_ctx, fde_ctx; 3270 struct module_format* modfmt; 3271 const unsigned char* end; 3272 DWORD_PTR delta; 3273 3274 if (!(pair.pcs = process_find_by_handle(csw->hProcess)) || 3275 !(pair.requested = module_find_by_addr(pair.pcs, ip, DMT_UNKNOWN)) || 3276 !module_get_debug(&pair)) 3277 return FALSE; 3278 modfmt = pair.effective->format_info[DFI_DWARF]; 3279 if (!modfmt) return FALSE; 3280 memset(&info, 0, sizeof(info)); 3281 fde_ctx.data = modfmt->u.dwarf2_info->eh_frame.address; 3282 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->eh_frame.size; 3283 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size; 3284 /* let offsets relative to the eh_frame sections be correctly computed, as we'll map 3285 * in this process the IMAGE section at a different address as the one expected by 3286 * the image 3287 */ 3288 delta = pair.effective->module.BaseOfImage + modfmt->u.dwarf2_info->eh_frame.rva - 3289 (DWORD_PTR)modfmt->u.dwarf2_info->eh_frame.address; 3290 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, TRUE)) 3291 { 3292 fde_ctx.data = modfmt->u.dwarf2_info->debug_frame.address; 3293 fde_ctx.end_data = fde_ctx.data + modfmt->u.dwarf2_info->debug_frame.size; 3294 fde_ctx.word_size = modfmt->u.dwarf2_info->word_size; 3295 delta = pair.effective->reloc_delta; 3296 if (!dwarf2_get_cie(ip, pair.effective, delta, &fde_ctx, &cie_ctx, &info, FALSE)) 3297 { 3298 TRACE("Couldn't find information for %lx\n", ip); 3299 return FALSE; 3300 } 3301 } 3302 3303 TRACE("function %lx/%lx code_align %lu data_align %ld retaddr %s\n", 3304 ip, info.ip, info.code_align, info.data_align, 3305 dbghelp_current_cpu->fetch_regname(dbghelp_current_cpu->map_dwarf_register(info.retaddr_reg, TRUE))); 3306 3307 /* if at very beginning of function, return and use default unwinder */ 3308 if (ip == info.ip) return FALSE; 3309 execute_cfa_instructions(&cie_ctx, ip, &info); 3310 3311 if (info.aug_z_format) /* get length of augmentation data */ 3312 { 3313 ULONG_PTR len = dwarf2_leb128_as_unsigned(&fde_ctx); 3314 end = fde_ctx.data + len; 3315 } 3316 else end = NULL; 3317 dwarf2_parse_augmentation_ptr(&fde_ctx, info.lsda_encoding); /* handler_data */ 3318 if (end) fde_ctx.data = end; 3319 3320 execute_cfa_instructions(&fde_ctx, ip, &info); 3321 3322 /* if there is no information about retaddr, use default unwinder */ 3323 if (info.state.rules[info.retaddr_reg] == RULE_UNSET) return FALSE; 3324 3325 apply_frame_state(pair.effective, csw, context, &info.state, cfa); 3326 3327 return TRUE; 3328 } 3329 3330 static void dwarf2_location_compute(struct process* pcs, 3331 const struct module_format* modfmt, 3332 const struct symt_function* func, 3333 struct location* loc) 3334 { 3335 struct location frame; 3336 DWORD_PTR ip; 3337 int err; 3338 dwarf2_traverse_context_t lctx; 3339 3340 if (!func->container || func->container->tag != SymTagCompiland) 3341 { 3342 WARN("We'd expect function %s's container to exist and be a compiland\n", func->hash_elt.name); 3343 err = loc_err_internal; 3344 } 3345 else 3346 { 3347 /* instruction pointer relative to compiland's start */ 3348 ip = pcs->ctx_frame.InstructionOffset - ((struct symt_compiland*)func->container)->address; 3349 3350 if ((err = loc_compute_frame(pcs, modfmt, func, ip, &frame)) == 0) 3351 { 3352 switch (loc->kind) 3353 { 3354 case loc_dwarf2_location_list: 3355 /* Then, if the variable has a location list, find it !! */ 3356 if (dwarf2_lookup_loclist(modfmt, 3357 modfmt->u.dwarf2_info->debug_loc.address + loc->offset, 3358 ip, &lctx)) 3359 goto do_compute; 3360 err = loc_err_out_of_scope; 3361 break; 3362 case loc_dwarf2_block: 3363 /* or if we have a copy of an existing block, get ready for it */ 3364 { 3365 unsigned* ptr = (unsigned*)loc->offset; 3366 3367 lctx.data = (const BYTE*)(ptr + 1); 3368 lctx.end_data = lctx.data + *ptr; 3369 lctx.word_size = modfmt->u.dwarf2_info->word_size; 3370 } 3371 do_compute: 3372 /* now get the variable */ 3373 err = compute_location(&lctx, loc, pcs->handle, &frame); 3374 break; 3375 case loc_register: 3376 case loc_regrel: 3377 /* nothing to do */ 3378 break; 3379 default: 3380 WARN("Unsupported local kind %d\n", loc->kind); 3381 err = loc_err_internal; 3382 } 3383 } 3384 } 3385 if (err < 0) 3386 { 3387 loc->kind = loc_register; 3388 loc->reg = err; 3389 } 3390 } 3391 3392 #ifdef HAVE_ZLIB 3393 static void *zalloc(void *priv, uInt items, uInt sz) 3394 { 3395 return HeapAlloc(GetProcessHeap(), 0, items * sz); 3396 } 3397 3398 static void zfree(void *priv, void *addr) 3399 { 3400 HeapFree(GetProcessHeap(), 0, addr); 3401 } 3402 3403 static inline BOOL dwarf2_init_zsection(dwarf2_section_t* section, 3404 const char* zsectname, 3405 struct image_section_map* ism) 3406 { 3407 z_stream z; 3408 LARGE_INTEGER li; 3409 int res; 3410 BOOL ret = FALSE; 3411 3412 BYTE *addr, *sect = (BYTE *)image_map_section(ism); 3413 size_t sz = image_get_map_size(ism); 3414 3415 if (sz <= 12 || memcmp(sect, "ZLIB", 4)) 3416 { 3417 ERR("invalid compressed section %s\n", zsectname); 3418 goto out; 3419 } 3420 3421 #ifdef WORDS_BIGENDIAN 3422 li.u.HighPart = *(DWORD*)§[4]; 3423 li.u.LowPart = *(DWORD*)§[8]; 3424 #else 3425 li.u.HighPart = RtlUlongByteSwap(*(DWORD*)§[4]); 3426 li.u.LowPart = RtlUlongByteSwap(*(DWORD*)§[8]); 3427 #endif 3428 3429 addr = HeapAlloc(GetProcessHeap(), 0, li.QuadPart); 3430 if (!addr) 3431 goto out; 3432 3433 z.next_in = §[12]; 3434 z.avail_in = sz - 12; 3435 z.opaque = NULL; 3436 z.zalloc = zalloc; 3437 z.zfree = zfree; 3438 3439 res = inflateInit(&z); 3440 if (res != Z_OK) 3441 { 3442 FIXME("inflateInit failed with %i / %s\n", res, z.msg); 3443 goto out_free; 3444 } 3445 3446 do { 3447 z.next_out = addr + z.total_out; 3448 z.avail_out = li.QuadPart - z.total_out; 3449 res = inflate(&z, Z_FINISH); 3450 } while (z.avail_in && res == Z_STREAM_END); 3451 3452 if (res != Z_STREAM_END) 3453 { 3454 FIXME("Decompression failed with %i / %s\n", res, z.msg); 3455 goto out_end; 3456 } 3457 3458 ret = TRUE; 3459 section->compressed = TRUE; 3460 section->address = addr; 3461 section->rva = image_get_map_rva(ism); 3462 section->size = z.total_out; 3463 3464 out_end: 3465 inflateEnd(&z); 3466 out_free: 3467 if (!ret) 3468 HeapFree(GetProcessHeap(), 0, addr); 3469 out: 3470 image_unmap_section(ism); 3471 return ret; 3472 } 3473 3474 #endif 3475 3476 static inline BOOL dwarf2_init_section(dwarf2_section_t* section, struct image_file_map* fmap, 3477 const char* sectname, const char* zsectname, 3478 struct image_section_map* ism) 3479 { 3480 struct image_section_map local_ism; 3481 3482 if (!ism) ism = &local_ism; 3483 3484 section->compressed = FALSE; 3485 if (image_find_section(fmap, sectname, ism)) 3486 { 3487 section->address = (const BYTE*)image_map_section(ism); 3488 section->size = image_get_map_size(ism); 3489 section->rva = image_get_map_rva(ism); 3490 return TRUE; 3491 } 3492 3493 section->address = NULL; 3494 section->size = 0; 3495 section->rva = 0; 3496 3497 if (zsectname && image_find_section(fmap, zsectname, ism)) 3498 { 3499 #ifdef HAVE_ZLIB 3500 return dwarf2_init_zsection(section, zsectname, ism); 3501 #else 3502 FIXME("dbghelp not built with zlib, but compressed section found\n" ); 3503 #endif 3504 } 3505 3506 return FALSE; 3507 } 3508 3509 static inline void dwarf2_fini_section(dwarf2_section_t* section) 3510 { 3511 if (section->compressed) 3512 HeapFree(GetProcessHeap(), 0, (void*)section->address); 3513 } 3514 3515 static void dwarf2_module_remove(struct process* pcs, struct module_format* modfmt) 3516 { 3517 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_loc); 3518 dwarf2_fini_section(&modfmt->u.dwarf2_info->debug_frame); 3519 HeapFree(GetProcessHeap(), 0, modfmt); 3520 } 3521 3522 BOOL dwarf2_parse(struct module* module, unsigned long load_offset, 3523 const struct elf_thunk_area* thunks, 3524 struct image_file_map* fmap) 3525 { 3526 dwarf2_section_t eh_frame, section[section_max]; 3527 dwarf2_traverse_context_t mod_ctx; 3528 struct image_section_map debug_sect, debug_str_sect, debug_abbrev_sect, 3529 debug_line_sect, debug_ranges_sect, eh_frame_sect; 3530 BOOL ret = TRUE; 3531 struct module_format* dwarf2_modfmt; 3532 3533 dwarf2_init_section(&eh_frame, fmap, ".eh_frame", NULL, &eh_frame_sect); 3534 dwarf2_init_section(§ion[section_debug], fmap, ".debug_info", ".zdebug_info", &debug_sect); 3535 dwarf2_init_section(§ion[section_abbrev], fmap, ".debug_abbrev", ".zdebug_abbrev", &debug_abbrev_sect); 3536 dwarf2_init_section(§ion[section_string], fmap, ".debug_str", ".zdebug_str", &debug_str_sect); 3537 dwarf2_init_section(§ion[section_line], fmap, ".debug_line", ".zdebug_line", &debug_line_sect); 3538 dwarf2_init_section(§ion[section_ranges], fmap, ".debug_ranges", ".zdebug_ranges", &debug_ranges_sect); 3539 3540 /* to do anything useful we need either .eh_frame or .debug_info */ 3541 if ((!eh_frame.address || eh_frame.address == IMAGE_NO_MAP) && 3542 (!section[section_debug].address || section[section_debug].address == IMAGE_NO_MAP)) 3543 { 3544 ret = FALSE; 3545 goto leave; 3546 } 3547 3548 if (fmap->modtype == DMT_ELF && debug_sect.fmap) 3549 { 3550 /* debug info might have a different base address than .so file 3551 * when elf file is prelinked after splitting off debug info 3552 * adjust symbol base addresses accordingly 3553 */ 3554 load_offset += fmap->u.elf.elf_start - debug_sect.fmap->u.elf.elf_start; 3555 } 3556 3557 TRACE("Loading Dwarf2 information for %s\n", debugstr_w(module->module.ModuleName)); 3558 3559 mod_ctx.data = section[section_debug].address; 3560 mod_ctx.end_data = mod_ctx.data + section[section_debug].size; 3561 mod_ctx.word_size = 0; /* will be correctly set later on */ 3562 3563 dwarf2_modfmt = HeapAlloc(GetProcessHeap(), 0, 3564 sizeof(*dwarf2_modfmt) + sizeof(*dwarf2_modfmt->u.dwarf2_info)); 3565 if (!dwarf2_modfmt) 3566 { 3567 ret = FALSE; 3568 goto leave; 3569 } 3570 dwarf2_modfmt->module = module; 3571 dwarf2_modfmt->remove = dwarf2_module_remove; 3572 dwarf2_modfmt->loc_compute = dwarf2_location_compute; 3573 dwarf2_modfmt->u.dwarf2_info = (struct dwarf2_module_info_s*)(dwarf2_modfmt + 1); 3574 dwarf2_modfmt->u.dwarf2_info->word_size = 0; /* will be correctly set later on */ 3575 dwarf2_modfmt->module->format_info[DFI_DWARF] = dwarf2_modfmt; 3576 3577 /* As we'll need later some sections' content, we won't unmap these 3578 * sections upon existing this function 3579 */ 3580 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_loc, fmap, ".debug_loc", ".zdebug_loc", NULL); 3581 dwarf2_init_section(&dwarf2_modfmt->u.dwarf2_info->debug_frame, fmap, ".debug_frame", ".zdebug_frame", NULL); 3582 dwarf2_modfmt->u.dwarf2_info->eh_frame = eh_frame; 3583 3584 while (mod_ctx.data < mod_ctx.end_data) 3585 { 3586 dwarf2_parse_compilation_unit(section, dwarf2_modfmt->module, thunks, &mod_ctx, load_offset); 3587 } 3588 dwarf2_modfmt->module->module.SymType = SymDia; 3589 dwarf2_modfmt->module->module.CVSig = 'D' | ('W' << 8) | ('A' << 16) | ('R' << 24); 3590 /* FIXME: we could have a finer grain here */ 3591 dwarf2_modfmt->module->module.GlobalSymbols = TRUE; 3592 dwarf2_modfmt->module->module.TypeInfo = TRUE; 3593 dwarf2_modfmt->module->module.SourceIndexed = TRUE; 3594 dwarf2_modfmt->module->module.Publics = TRUE; 3595 3596 /* set the word_size for eh_frame parsing */ 3597 dwarf2_modfmt->u.dwarf2_info->word_size = fmap->addr_size / 8; 3598 3599 leave: 3600 dwarf2_fini_section(§ion[section_debug]); 3601 dwarf2_fini_section(§ion[section_abbrev]); 3602 dwarf2_fini_section(§ion[section_string]); 3603 dwarf2_fini_section(§ion[section_line]); 3604 dwarf2_fini_section(§ion[section_ranges]); 3605 3606 image_unmap_section(&debug_sect); 3607 image_unmap_section(&debug_abbrev_sect); 3608 image_unmap_section(&debug_str_sect); 3609 image_unmap_section(&debug_line_sect); 3610 image_unmap_section(&debug_ranges_sect); 3611 if (!ret) image_unmap_section(&eh_frame_sect); 3612 3613 return ret; 3614 } 3615