programs/winedbg/symbol.c

   1 /*
   2  * Generate hash tables for Wine debugger symbols
   3  *
   4  * Copyright (C) 1993, Eric Youngdale.
   5  *               2004-2005, Eric Pouech.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "debugger.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
  31
  32 static BOOL symbol_get_debug_start(const struct dbg_type* func, ULONG64* start)
  33 {
  34     DWORD                       count, tag;
  35     char                        buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
  36     TI_FINDCHILDREN_PARAMS*     fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
  37     int                         i;
  38     struct dbg_type             child;
  39
  40     if (!func->id) return FALSE; /* native dbghelp not always fills the info field */
  41
  42     if (!types_get_info(func, TI_GET_CHILDRENCOUNT, &count)) return FALSE;
  43     fcp->Start = 0;
  44     while (count)
  45     {
  46         fcp->Count = min(count, 256);
  47         if (types_get_info(func, TI_FINDCHILDREN, fcp))
  48         {
  49             for (i = 0; i < min(fcp->Count, count); i++)
  50             {
  51                 child.module = func->module;
  52                 child.id = fcp->ChildId[i];
  53                 types_get_info(&child, TI_GET_SYMTAG, &tag);
  54                 if (tag != SymTagFuncDebugStart) continue;
  55                 return types_get_info(&child, TI_GET_ADDRESS, start);
  56             }
  57             count -= min(count, 256);
  58             fcp->Start += 256;
  59             fcp->Start += 256;
  60         }
  61     }
  62     return FALSE;
  63 }
  64
  65 static BOOL fill_sym_lvalue(const SYMBOL_INFO* sym, ULONG_PTR base,
  66                             struct dbg_lvalue* lvalue, char* buffer, size_t sz)
  67 {
  68     if (buffer) buffer[0] = '\0';
  69     if (sym->Flags & SYMFLAG_REGISTER)
  70     {
  71         DWORD_PTR* pval;
  72
  73         if (!memory_get_register(sym->Register, &pval, buffer, sz))
  74             return FALSE;
  75         lvalue->cookie = DLV_HOST;
  76         lvalue->addr.Offset = (DWORD_PTR)pval;
  77     }
  78     else if (sym->Flags & SYMFLAG_REGREL)
  79     {
  80         DWORD_PTR* pval;
  81         size_t  l;
  82
  83         *buffer++ = '['; sz--;
  84         if (!memory_get_register(sym->Register, &pval, buffer, sz))
  85             return FALSE;
  86         l = strlen(buffer);
  87         sz -= l;
  88         buffer += l;
  89         lvalue->cookie = DLV_TARGET;
  90         lvalue->addr.Offset = (ULONG64)*pval + sym->Address;
  91         if ((LONG_PTR)sym->Address >= 0)
  92             snprintf(buffer, sz, "+%ld]", (ULONG_PTR)sym->Address);
  93         else
  94             snprintf(buffer, sz, "-%ld]", -(LONG_PTR)sym->Address);
  95     }
  96     else if (sym->Flags & SYMFLAG_VALUEPRESENT)
  97     {
  98         struct dbg_type type;
  99         VARIANT         v;
 100
 101         type.module = sym->ModBase;
 102         type.id = sym->Index;
 103
 104         if (!types_get_info(&type, TI_GET_VALUE, &v))
 105         {
 106             if (buffer) snprintf(buffer, sz, "Couldn't get full value information for %s", sym->Name);
 107             return FALSE;
 108         }
 109         else if (v.n1.n2.vt & VT_BYREF)
 110         {
 111             /* FIXME: this won't work for pointers or arrays, as we don't always
 112              * know, if the value to be dereferenced lies in debuggee or
 113              * debugger address space.
 114              */
 115             if (sym->Tag == SymTagPointerType || sym->Tag == SymTagArrayType)
 116             {
 117                 if (buffer) snprintf(buffer, sz, "Couldn't dereference pointer for const value for %s", sym->Name);
 118                 return FALSE;
 119             }
 120             /* this is likely Wine's dbghelp which passes const values by reference
 121              * (object is managed by dbghelp, hence in debugger address space)
 122              */
 123             lvalue->cookie = DLV_HOST;
 124             lvalue->addr.Offset = (DWORD_PTR)sym->Value;
 125         }
 126         else
 127         {
 128             DWORD* pdw = (DWORD*)lexeme_alloc_size(sizeof(*pdw));
 129             lvalue->cookie = DLV_HOST;
 130             lvalue->addr.Offset = (DWORD_PTR)pdw;
 131             *pdw = sym->Value;
 132         }
 133     }
 134     else if (sym->Flags & SYMFLAG_LOCAL)
 135     {
 136         lvalue->cookie = DLV_TARGET;
 137         lvalue->addr.Offset = base + sym->Address;
 138     }
 139     else if (sym->Flags & SYMFLAG_TLSREL)
 140     {
 141         PROCESS_BASIC_INFORMATION pbi;
 142         THREAD_BASIC_INFORMATION  tbi;
 143         DWORD_PTR                 addr;
 144         PEB                       peb;
 145         PEB_LDR_DATA              ldr_data;
 146         PLIST_ENTRY               head, current;
 147         LDR_MODULE                ldr_module;
 148         unsigned                  tlsindex = -1;
 149
 150         if (NtQueryInformationProcess(dbg_curr_process->handle, ProcessBasicInformation,
 151                                       &pbi, sizeof(pbi), NULL) ||
 152             NtQueryInformationThread(dbg_curr_thread->handle, ThreadBasicInformation,
 153                                      &tbi, sizeof(tbi), NULL))
 154         {
 155         tls_error:
 156             if (buffer) snprintf(buffer, sz, "Cannot read TLS address\n");
 157             return FALSE;
 158         }
 159         addr = (DWORD_PTR)&(((TEB*)tbi.TebBaseAddress)->ThreadLocalStoragePointer);
 160         if (!dbg_read_memory((void*)addr, &addr, sizeof(addr)) ||
 161             !dbg_read_memory(pbi.PebBaseAddress, &peb, sizeof(peb)) ||
 162             !dbg_read_memory(peb.LdrData, &ldr_data, sizeof(ldr_data)))
 163             goto tls_error;
 164         current = ldr_data.InLoadOrderModuleList.Flink;
 165         head = &((PEB_LDR_DATA*)peb.LdrData)->InLoadOrderModuleList;
 166         do
 167         {
 168             if (!dbg_read_memory(CONTAINING_RECORD(current, LDR_MODULE, InLoadOrderModuleList),
 169                                  &ldr_module, sizeof(ldr_module))) goto tls_error;
 170             if ((DWORD_PTR)ldr_module.BaseAddress == sym->ModBase)
 171             {
 172                 tlsindex = ldr_module.TlsIndex;
 173                 break;
 174             }
 175             current = ldr_module.InLoadOrderModuleList.Flink;
 176         } while (current != head);
 177
 178         addr += tlsindex * sizeof(DWORD_PTR);
 179         if (!dbg_read_memory((void*)addr, &addr, sizeof(addr))) goto tls_error;
 180         lvalue->cookie = DLV_TARGET;
 181         lvalue->addr.Offset = addr + sym->Address;
 182     }
 183     else
 184     {
 185         lvalue->cookie = DLV_TARGET;
 186         lvalue->addr.Offset = sym->Address;
 187     }
 188     lvalue->addr.Mode = AddrModeFlat;
 189     lvalue->type.module = sym->ModBase;
 190     lvalue->type.id = sym->TypeIndex;
 191
 192     return TRUE;
 193 }
 194
 195 struct sgv_data
 196 {
 197 #define NUMDBGV                 100
 198     struct
 199     {
 200         /* FIXME: NUMDBGV should be made variable */
 201         struct dbg_lvalue               lvalue;
 202         DWORD                           flags;
 203         DWORD                           sym_info;
 204     }                           syms[NUMDBGV];  /* out     : will be filled in with various found symbols */
 205     int                         num;            /* out     : number of found symbols */
 206     int                         num_thunks;     /* out     : number of thunks found */
 207     const char*                 name;           /* in      : name of symbol to look up */
 208     unsigned                    do_thunks : 1;  /* in      : whether we return thunks tags */
 209     ULONG64                     frame_offset;   /* in      : frame for local & parameter variables look up */
 210 };
 211
 212 static BOOL CALLBACK sgv_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
 213 {
 214     struct sgv_data*    sgv = ctx;
 215     unsigned            insp;
 216     char                tmp[64];
 217
 218     if (sym->Flags & SYMFLAG_THUNK)
 219     {
 220         if (!sgv->do_thunks) return TRUE;
 221         sgv->num_thunks++;
 222     }
 223
 224     if (sgv->num >= NUMDBGV)
 225     {
 226         dbg_printf("Too many addresses for symbol '%s', limiting the first %d\n",
 227                    sgv->name, NUMDBGV);
 228         return FALSE;
 229     }
 230     WINE_TRACE("==> %s %s%s%s%s%s%s%s%s\n",
 231                sym->Name,
 232                (sym->Flags & SYMFLAG_FUNCTION) ? "func " : "",
 233                (sym->Flags & SYMFLAG_FRAMEREL) ? "framerel " : "",
 234                (sym->Flags & SYMFLAG_TLSREL) ? "tlsrel " : "",
 235                (sym->Flags & SYMFLAG_REGISTER) ? "register " : "",
 236                (sym->Flags & SYMFLAG_REGREL) ? "regrel " : "",
 237                (sym->Flags & SYMFLAG_PARAMETER) ? "param " : "",
 238                (sym->Flags & SYMFLAG_LOCAL) ? "local " : "",
 239                (sym->Flags & SYMFLAG_THUNK) ? "thunk " : "");
 240
 241     /* always keep the thunks at end of the array */
 242     insp = sgv->num;
 243     if (sgv->num_thunks && !(sym->Flags & SYMFLAG_THUNK))
 244     {
 245         insp -= sgv->num_thunks;
 246         memmove(&sgv->syms[insp + 1], &sgv->syms[insp],
 247                 sizeof(sgv->syms[0]) * sgv->num_thunks);
 248     }
 249     if (!fill_sym_lvalue(sym, sgv->frame_offset, &sgv->syms[insp].lvalue, tmp, sizeof(tmp)))
 250     {
 251         dbg_printf("%s: %s\n", sym->Name, tmp);
 252         return TRUE;
 253     }
 254     sgv->syms[insp].flags              = sym->Flags;
 255     sgv->syms[insp].sym_info           = sym->Index;
 256     sgv->num++;
 257
 258     return TRUE;
 259 }
 260
 261 enum sym_get_lval symbol_picker_interactive(const char* name, const struct sgv_data* sgv,
 262                                             struct dbg_lvalue* rtn)
 263 {
 264     char        buffer[512];
 265     unsigned    i;
 266
 267     if (!dbg_interactiveP)
 268     {
 269         dbg_printf("More than one symbol named %s, picking the first one\n", name);
 270         *rtn = sgv->syms[0].lvalue;
 271         return sglv_found;
 272     }
 273
 274     dbg_printf("Many symbols with name '%s', "
 275                "choose the one you want (<cr> to abort):\n", name);
 276     for (i = 0; i < sgv->num; i++)
 277     {
 278         if (sgv->num - sgv->num_thunks > 1 && (sgv->syms[i].flags & SYMFLAG_THUNK) && !DBG_IVAR(AlwaysShowThunks))
 279             continue;
 280         dbg_printf("[%d]: ", i + 1);
 281         if (sgv->syms[i].flags & (SYMFLAG_LOCAL | SYMFLAG_PARAMETER))
 282         {
 283             dbg_printf("%s %sof %s\n",
 284                        sgv->syms[i].flags & SYMFLAG_PARAMETER ? "Parameter" : "Local variable",
 285                        sgv->syms[i].flags & (SYMFLAG_REGISTER|SYMFLAG_REGREL) ? "(in a register) " : "",
 286                        name);
 287         }
 288         else if (sgv->syms[i].flags & SYMFLAG_THUNK)
 289         {
 290             print_address(&sgv->syms[i].lvalue.addr, TRUE);
 291             /* FIXME: should display where the thunks points to */
 292             dbg_printf(" thunk %s\n", name);
 293         }
 294         else
 295         {
 296             print_address(&sgv->syms[i].lvalue.addr, TRUE);
 297             dbg_printf("\n");
 298         }
 299     }
 300     do
 301     {
 302         if (input_read_line("=> ", buffer, sizeof(buffer)))
 303         {
 304             if (buffer[0] == '\0') return sglv_aborted;
 305             i = atoi(buffer);
 306             if (i < 1 || i > sgv->num)
 307                 dbg_printf("Invalid choice %d\n", i);
 308         }
 309         else return sglv_aborted;
 310     } while (i < 1 || i > sgv->num);
 311
 312     /* The array is 0-based, but the choices are 1..n,
 313      * so we have to subtract one before returning.
 314      */
 315     *rtn = sgv->syms[i - 1].lvalue;
 316     return sglv_found;
 317 }
 318
 319 enum sym_get_lval symbol_picker_scoped(const char* name, const struct sgv_data* sgv,
 320                                        struct dbg_lvalue* rtn)
 321 {
 322     unsigned i;
 323     int local = -1;
 324
 325     for (i = 0; i < sgv->num; i++)
 326     {
 327         if (sgv->num - sgv->num_thunks > 1 && (sgv->syms[i].flags & SYMFLAG_THUNK) && !DBG_IVAR(AlwaysShowThunks))
 328             continue;
 329         if (sgv->syms[i].flags & (SYMFLAG_LOCAL | SYMFLAG_PARAMETER))
 330         {
 331             if (local == -1)
 332                 local = i;
 333             else
 334             {
 335                 /* FIXME: several locals with same name... which one to pick ?? */
 336                 dbg_printf("Several local variables/parameters for %s, aborting\n", name);
 337                 return sglv_aborted;
 338             }
 339         }
 340     }
 341     if (local != -1)
 342     {
 343         *rtn = sgv->syms[local].lvalue;
 344         return sglv_found;
 345     }
 346     /* no locals found, multiple globals... abort for now */
 347     dbg_printf("Several global variables for %s, aborting\n", name);
 348     return sglv_aborted;
 349 }
 350
 351 symbol_picker_t symbol_current_picker = symbol_picker_interactive;
 352
 353 /***********************************************************************
 354  *           symbol_get_lvalue
 355  *
 356  * Get the address of a named symbol.
 357  * Return values:
 358  *      sglv_found:   if the symbol is found
 359  *      sglv_unknown: if the symbol isn't found
 360  *      sglv_aborted: some error occurred (likely, many symbols of same name exist,
 361  *          and user didn't pick one of them)
 362  */
 363 enum sym_get_lval symbol_get_lvalue(const char* name, const int lineno,
 364                                     struct dbg_lvalue* rtn, BOOL bp_disp)
 365 {
 366     struct sgv_data             sgv;
 367     int                         i;
 368     char                        buffer[512];
 369     DWORD                       opt;
 370     IMAGEHLP_STACK_FRAME        ihsf;
 371
 372     if (strlen(name) + 4 > sizeof(buffer))
 373     {
 374         WINE_WARN("Too long symbol (%s)\n", name);
 375         return sglv_unknown;
 376     }
 377
 378     sgv.num        = 0;
 379     sgv.num_thunks = 0;
 380     sgv.name       = &buffer[2];
 381     sgv.do_thunks  = DBG_IVAR(AlwaysShowThunks);
 382
 383     if (strchr(name, '!'))
 384     {
 385         strcpy(buffer, name);
 386     }
 387     else
 388     {
 389         buffer[0] = '*';
 390         buffer[1] = '!';
 391         strcpy(&buffer[2], name);
 392     }
 393
 394     /* this is a wine specific options to return also ELF modules in the
 395      * enumeration
 396      */
 397     SymSetOptions((opt = SymGetOptions()) | 0x40000000);
 398     SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv);
 399
 400     if (!sgv.num)
 401     {
 402         const char*   ptr = strchr(name, '!');
 403         if ((ptr && ptr[1] != '_') || (!ptr && *name != '_'))
 404         {
 405             if (ptr)
 406             {
 407                 int offset = ptr - name;
 408                 memcpy(buffer, name, offset + 1);
 409                 buffer[offset + 1] = '_';
 410                 strcpy(&buffer[offset + 2], ptr + 1);
 411             }
 412             else
 413             {
 414                 buffer[0] = '*';
 415                 buffer[1] = '!';
 416                 buffer[2] = '_';
 417                 strcpy(&buffer[3], name);
 418             }
 419             SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv);
 420         }
 421     }
 422     SymSetOptions(opt);
 423
 424     /* now grab local symbols */
 425     if (stack_get_current_frame(&ihsf) && sgv.num < NUMDBGV)
 426     {
 427         sgv.frame_offset = ihsf.FrameOffset;
 428         SymEnumSymbols(dbg_curr_process->handle, 0, name, sgv_cb, (void*)&sgv);
 429     }
 430
 431     if (!sgv.num)
 432     {
 433         dbg_printf("No symbols found for %s\n", name);
 434         return sglv_unknown;
 435     }
 436
 437     /* recompute potential offsets for functions (linenumber, skip prolog) */
 438     for (i = 0; i < sgv.num; i++)
 439     {
 440         if (sgv.syms[i].flags & (SYMFLAG_REGISTER|SYMFLAG_REGREL|SYMFLAG_LOCAL|SYMFLAG_THUNK))
 441             continue;
 442
 443         if (lineno == -1)
 444         {
 445             struct dbg_type     type;
 446             ULONG64             addr;
 447
 448             type.module = sgv.syms[i].lvalue.type.module;
 449             type.id     = sgv.syms[i].sym_info;
 450             if (bp_disp && symbol_get_debug_start(&type, &addr))
 451                 sgv.syms[i].lvalue.addr.Offset = addr;
 452         }
 453         else
 454         {
 455             DWORD               disp;
 456             IMAGEHLP_LINE64     il;
 457             BOOL                found = FALSE;
 458
 459             il.SizeOfStruct = sizeof(il);
 460             SymGetLineFromAddr64(dbg_curr_process->handle,
 461                                  (DWORD_PTR)memory_to_linear_addr(&sgv.syms[i].lvalue.addr),
 462                                  &disp, &il);
 463             do
 464             {
 465                 if (lineno == il.LineNumber)
 466                 {
 467                     sgv.syms[i].lvalue.addr.Offset = il.Address;
 468                     found = TRUE;
 469                     break;
 470                 }
 471             } while (SymGetLineNext64(dbg_curr_process->handle, &il));
 472             if (!found)
 473                 WINE_FIXME("No line (%d) found for %s (setting to symbol start)\n",
 474                            lineno, name);
 475         }
 476     }
 477
 478     if (sgv.num - sgv.num_thunks > 1 || /* many symbols non thunks (and showing only non thunks) */
 479         (sgv.num > 1 && DBG_IVAR(AlwaysShowThunks)) || /* many symbols (showing symbols & thunks) */
 480         (sgv.num == sgv.num_thunks && sgv.num_thunks > 1))
 481     {
 482         return symbol_current_picker(name, &sgv, rtn);
 483     }
 484     /* first symbol is the one we want:
 485      * - only one symbol found,
 486      * - or many symbols but only one non thunk when AlwaysShowThunks is FALSE
 487      */
 488     *rtn = sgv.syms[0].lvalue;
 489     return sglv_found;
 490 }
 491
 492 BOOL symbol_is_local(const char* name)
 493 {
 494     struct sgv_data             sgv;
 495     IMAGEHLP_STACK_FRAME        ihsf;
 496
 497     sgv.num        = 0;
 498     sgv.num_thunks = 0;
 499     sgv.name       = name;
 500     sgv.do_thunks  = FALSE;
 501
 502     if (stack_get_current_frame(&ihsf))
 503     {
 504         sgv.frame_offset = ihsf.FrameOffset;
 505         SymEnumSymbols(dbg_curr_process->handle, 0, name, sgv_cb, (void*)&sgv);
 506     }
 507     return sgv.num > 0;
 508 }
 509
 510 /***********************************************************************
 511  *           symbol_read_symtable
 512  *
 513  * Read a symbol file into the hash table.
 514  */
 515 void symbol_read_symtable(const char* filename, unsigned long offset)
 516 {
 517     dbg_printf("No longer supported\n");
 518
 519 #if 0
 520 /* FIXME: have to implement SymAddSymbol in dbghelp, but likely we'll need to link
 521  * this with an already loaded module !!
 522  */
 523     FILE*       symbolfile;
 524     unsigned    addr;
 525     char        type;
 526     char*       cpnt;
 527     char        buffer[256];
 528     char        name[256];
 529
 530     if (!(symbolfile = fopen(filename, "r")))
 531     {
 532         WINE_WARN("Unable to open symbol table %s\n", filename);
 533         return;
 534     }
 535
 536     dbg_printf("Reading symbols from file %s\n", filename);
 537
 538     while (1)
 539     {
 540         fgets(buffer, sizeof(buffer), symbolfile);
 541         if (feof(symbolfile)) break;
 542
 543         /* Strip any text after a # sign (i.e. comments) */
 544         cpnt = strchr(buffer, '#');
 545         if (cpnt) *cpnt = '\0';
 546
 547         /* Quietly ignore any lines that have just whitespace */
 548         for (cpnt = buffer; *cpnt; cpnt++)
 549         {
 550             if (*cpnt != ' ' && *cpnt != '\t') break;
 551         }
 552         if (!*cpnt || *cpnt == '\n') continue;
 553
 554         if (sscanf(buffer, "%lx %c %s", &addr, &type, name) == 3)
 555         {
 556             if (value.addr.off + offset < value.addr.off)
 557                 WINE_WARN("Address wrap around\n");
 558             value.addr.off += offset;
 559             SymAddSymbol(current_process->handle, BaseOfDll,
 560                          name, addr, 0, 0);
 561         }
 562     }
 563     fclose(symbolfile);
 564 #endif
 565 }
 566
 567 /***********************************************************************
 568  *           symbol_get_function_line_status
 569  *
 570  * Find the symbol nearest to a given address.
 571  */
 572 enum dbg_line_status symbol_get_function_line_status(const ADDRESS64* addr)
 573 {
 574     IMAGEHLP_LINE64     il;
 575     DWORD               disp;
 576     ULONG64             disp64, start;
 577     DWORD_PTR           lin = (DWORD_PTR)memory_to_linear_addr(addr);
 578     char                buffer[sizeof(SYMBOL_INFO) + 256];
 579     SYMBOL_INFO*        sym = (SYMBOL_INFO*)buffer;
 580     struct dbg_type     func;
 581
 582     il.SizeOfStruct = sizeof(il);
 583     sym->SizeOfStruct = sizeof(SYMBOL_INFO);
 584     sym->MaxNameLen = sizeof(buffer) - sizeof(SYMBOL_INFO);
 585
 586     /* do we have some info for lin address ? */
 587     if (!SymFromAddr(dbg_curr_process->handle, lin, &disp64, sym))
 588     {
 589         ADDRESS64   jumpee;
 590         /* some compilers insert thunks in their code without debug info associated
 591          * take care of this situation
 592          */
 593         if (dbg_curr_process->be_cpu->is_jump((void*)lin, &jumpee))
 594             return symbol_get_function_line_status(&jumpee);
 595         return dbg_no_line_info;
 596     }
 597
 598     switch (sym->Tag)
 599     {
 600     case SymTagThunk:
 601         /* FIXME: so far dbghelp doesn't return the 16 <=> 32 thunks
 602          * and furthermore, we no longer take care of them !!!
 603          */
 604         return dbg_in_a_thunk;
 605     case SymTagFunction:
 606     case SymTagPublicSymbol: break;
 607     default:
 608         WINE_FIXME("Unexpected sym-tag 0x%08x\n", sym->Tag);
 609     case SymTagData:
 610         return dbg_no_line_info;
 611     }
 612     /* we should have a function now */
 613     if (!SymGetLineFromAddr64(dbg_curr_process->handle, lin, &disp, &il))
 614         return dbg_no_line_info;
 615
 616     func.module = sym->ModBase;
 617     func.id     = sym->Index;
 618
 619     if (symbol_get_debug_start(&func, &start) && lin < start)
 620         return dbg_not_on_a_line_number;
 621
 622     if (!sym->Size) sym->Size = 0x100000;
 623     if (il.FileName && il.FileName[0] && disp < sym->Size)
 624         return (disp == 0) ? dbg_on_a_line_number : dbg_not_on_a_line_number;
 625
 626     return dbg_no_line_info;
 627 }
 628
 629 /***********************************************************************
 630  *           symbol_get_line
 631  *
 632  * Find the symbol nearest to a given address.
 633  * Returns sourcefile name and line number in a format that the listing
 634  * handler can deal with.
 635  */
 636 BOOL symbol_get_line(const char* filename, const char* name,
 637                      IMAGEHLP_LINE64* line)
 638 {
 639     struct sgv_data     sgv;
 640     char                buffer[512];
 641     DWORD               opt, disp;
 642     unsigned            i;
 643     BOOL                found = FALSE;
 644     IMAGEHLP_LINE64     il;
 645
 646     sgv.num        = 0;
 647     sgv.num_thunks = 0;
 648     sgv.name       = &buffer[2];
 649     sgv.do_thunks  = FALSE;
 650
 651     buffer[0] = '*';
 652     buffer[1] = '!';
 653     strcpy(&buffer[2], name);
 654
 655     /* this is a wine specific options to return also ELF modules in the
 656      * enumeration
 657      */
 658     SymSetOptions((opt = SymGetOptions()) | 0x40000000);
 659     if (!SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv))
 660     {
 661         SymSetOptions(opt);
 662         return FALSE;
 663     }
 664
 665     if (!sgv.num && (name[0] != '_'))
 666     {
 667         buffer[2] = '_';
 668         strcpy(&buffer[3], name);
 669         if (!SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv))
 670         {
 671             SymSetOptions(opt);
 672             return FALSE;
 673         }
 674     }
 675     SymSetOptions(opt);
 676
 677     for (i = 0; i < sgv.num; i++)
 678     {
 679         DWORD_PTR linear = (DWORD_PTR)memory_to_linear_addr(&sgv.syms[i].lvalue.addr);
 680
 681         il.SizeOfStruct = sizeof(il);
 682         if (!SymGetLineFromAddr64(dbg_curr_process->handle, linear, &disp, &il))
 683             continue;
 684         if (filename && strcmp(il.FileName, filename)) continue;
 685         if (found)
 686         {
 687             WINE_FIXME("Several found, returning first (may not be what you want)...\n");
 688             break;
 689         }
 690         found = TRUE;
 691         *line = il;
 692     }
 693     if (!found)
 694     {
 695         if (filename)   dbg_printf("No such function %s in %s\n", name, filename);
 696         else            dbg_printf("No such function %s\n", name);
 697         return FALSE;
 698     }
 699     return TRUE;
 700 }
 701
 702 /******************************************************************
 703  *              symbol_print_local
 704  *
 705  * Overall format is:
 706  * <name>=<value>                       in non detailed form
 707  * <name>=<value> (local|pmt <where>)   in detailed form
 708  * Note <value> can be an error message in case of error
 709  */
 710 void symbol_print_local(const SYMBOL_INFO* sym, DWORD_PTR base, BOOL detailed)
 711 {
 712     struct dbg_lvalue   lvalue;
 713     char                buffer[64];
 714
 715     dbg_printf("%s=", sym->Name);
 716
 717     if (fill_sym_lvalue(sym, base, &lvalue, buffer, sizeof(buffer)))
 718     {
 719         print_value(&lvalue, 0, 1);
 720         if (detailed)
 721             dbg_printf(" (%s %s)",
 722                        (sym->Flags & SYMFLAG_PARAMETER) ? "parameter" : "local",
 723                        buffer);
 724     }
 725     else
 726     {
 727         dbg_printf("%s", buffer);
 728         if (detailed)
 729             dbg_printf(" (%s)",
 730                        (sym->Flags & SYMFLAG_PARAMETER) ? "parameter" : "local");
 731     }
 732 }
 733
 734 static BOOL CALLBACK info_locals_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
 735 {
 736     struct dbg_type     type;
 737
 738     dbg_printf("\t");
 739     type.module = sym->ModBase;
 740     type.id = sym->TypeIndex;
 741     types_print_type(&type, FALSE);
 742
 743     dbg_printf(" ");
 744     symbol_print_local(sym, (DWORD_PTR)ctx, TRUE);
 745     dbg_printf("\n");
 746
 747     return TRUE;
 748 }
 749
 750 BOOL symbol_info_locals(void)
 751 {
 752     IMAGEHLP_STACK_FRAME        ihsf;
 753     ADDRESS64                   addr;
 754
 755     stack_get_current_frame(&ihsf);
 756     addr.Mode = AddrModeFlat;
 757     addr.Offset = ihsf.InstructionOffset;
 758     print_address(&addr, FALSE);
 759     dbg_printf(": (%08lx)\n", (DWORD_PTR)ihsf.FrameOffset);
 760     SymEnumSymbols(dbg_curr_process->handle, 0, NULL, info_locals_cb, (void*)(DWORD_PTR)ihsf.FrameOffset);
 761
 762     return TRUE;
 763
 764 }
 765
 766 static BOOL CALLBACK symbols_info_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
 767 {
 768     struct dbg_type     type;
 769     IMAGEHLP_MODULE     mi;
 770
 771     mi.SizeOfStruct = sizeof(mi);
 772
 773     if (!SymGetModuleInfo(dbg_curr_process->handle, sym->ModBase, &mi))
 774         mi.ModuleName[0] = '\0';
 775     else
 776     {
 777         size_t  len = strlen(mi.ModuleName);
 778         if (len > 5 && !strcmp(mi.ModuleName + len - 5, "<elf>"))
 779             mi.ModuleName[len - 5] = '\0';
 780     }
 781
 782     dbg_printf("%08lx: %s!%s", (ULONG_PTR)sym->Address, mi.ModuleName, sym->Name);
 783     type.id = sym->TypeIndex;
 784     type.module = sym->ModBase;
 785
 786     if (sym->TypeIndex != dbg_itype_none && sym->TypeIndex != 0)
 787     {
 788         dbg_printf(" ");
 789         types_print_type(&type, FALSE);
 790     }
 791     dbg_printf("\n");
 792     return TRUE;
 793 }
 794
 795 void symbol_info(const char* str)
 796 {
 797     char        buffer[512];
 798     DWORD       opt;
 799
 800     if (strlen(str) + 3 >= sizeof(buffer))
 801     {
 802         dbg_printf("Symbol too long (%s)\n", str);
 803         return;
 804     }
 805     buffer[0] = '*';
 806     buffer[1] = '!';
 807     strcpy(&buffer[2], str);
 808     /* this is a wine specific options to return also ELF modules in the
 809      * enumeration
 810      */
 811     SymSetOptions((opt = SymGetOptions()) | 0x40000000);
 812     SymEnumSymbols(dbg_curr_process->handle, 0, buffer, symbols_info_cb, NULL);
 813     SymSetOptions(opt);
 814 }