debugger/module.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2 /*
   3  * File module.c - module handling for the wine debugger
   4  *
   5  * Copyright (C) 1993, Eric Youngdale.
   6  *               2000, Eric Pouech
   7  */
   8 #include "config.h"
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include "neexe.h"
  13 #include "module.h"
  14 #include "file.h"
  15 #include "debugger.h"
  16 #include "toolhelp.h"
  17
  18 /***********************************************************************
  19  * Creates and links a new module to the current process
  20  *
  21  */
  22 DBG_MODULE*     DEBUG_AddModule(const char* name, int type,
  23                                 void* mod_addr, HMODULE hmodule)
  24 {
  25     DBG_MODULE* wmod;
  26
  27     if (!(wmod = (DBG_MODULE*)DBG_alloc(sizeof(*wmod))))
  28         return NULL;
  29
  30     memset(wmod, 0, sizeof(*wmod));
  31
  32     wmod->next = DEBUG_CurrProcess->modules;
  33     wmod->status = DM_STATUS_NEW;
  34     wmod->type = type;
  35     wmod->load_addr = mod_addr;
  36     wmod->handle = hmodule;
  37     wmod->dbg_index = DEBUG_CurrProcess->next_index;
  38     wmod->module_name = DBG_strdup(name);
  39     DEBUG_CurrProcess->modules = wmod;
  40
  41     return wmod;
  42 }
  43
  44 /***********************************************************************
  45  *      DEBUG_FindModuleByName
  46  *
  47  */
  48 DBG_MODULE*     DEBUG_FindModuleByName(const char* name, int type)
  49 {
  50     DBG_MODULE* wmod;
  51
  52     for (wmod = DEBUG_CurrProcess->modules; wmod; wmod = wmod->next) {
  53         if ((type == DM_TYPE_UNKNOWN || type == wmod->type) &&
  54             !strcasecmp(name, wmod->module_name)) break;
  55     }
  56     return wmod;
  57 }
  58
  59 /***********************************************************************
  60  *      DEBUG_FindModuleByAddr
  61  *
  62  * either the addr where module is loaded, or any address inside the
  63  * module
  64  */
  65 DBG_MODULE*     DEBUG_FindModuleByAddr(void* addr, int type)
  66 {
  67     DBG_MODULE* wmod;
  68     DBG_MODULE* res = NULL;
  69
  70     for (wmod = DEBUG_CurrProcess->modules; wmod; wmod = wmod->next) {
  71         if ((type == DM_TYPE_UNKNOWN || type == wmod->type) &&
  72             (u_long)addr >= (u_long)wmod->load_addr &&
  73             (!res || res->load_addr < wmod->load_addr))
  74             res = wmod;
  75     }
  76     return res;
  77 }
  78
  79 /***********************************************************************
  80  *              DEBUG_FindModuleByHandle
  81  */
  82 DBG_MODULE*     DEBUG_FindModuleByHandle(HANDLE handle, int type)
  83 {
  84     DBG_MODULE* wmod;
  85
  86     for (wmod = DEBUG_CurrProcess->modules; wmod; wmod = wmod->next) {
  87         if ((type == DM_TYPE_UNKNOWN || type == wmod->type) && handle == wmod->handle) break;
  88     }
  89     return wmod;
  90 }
  91
  92 /***********************************************************************
  93  *                      DEBUG_RegisterELFModule
  94  *
  95  * ELF modules are also entered into the list - this is so that we
  96  * can make 'info shared' types of displays possible.
  97  */
  98 DBG_MODULE* DEBUG_RegisterELFModule(u_long load_addr, const char* name)
  99 {
 100     DBG_MODULE* wmod = DEBUG_AddModule(name, DM_TYPE_ELF, (void*)load_addr, 0);
 101
 102     if (!wmod) return NULL;
 103
 104     wmod->status = DM_STATUS_LOADED;
 105     DEBUG_CurrProcess->next_index++;
 106
 107     return wmod;
 108 }
 109
 110 /***********************************************************************
 111  *                      DEBUG_RegisterPEModule
 112  *
 113  */
 114 DBG_MODULE* DEBUG_RegisterPEModule(HMODULE hModule, u_long load_addr, const char *module_name)
 115 {
 116     DBG_MODULE* wmod = DEBUG_AddModule(module_name, DM_TYPE_PE, (void*)load_addr, hModule);
 117
 118     if (!wmod) return NULL;
 119
 120     DEBUG_CurrProcess->next_index++;
 121
 122     return wmod;
 123 }
 124
 125 /***********************************************************************
 126  *                      DEBUG_RegisterNEModule
 127  *
 128  */
 129 DBG_MODULE* DEBUG_RegisterNEModule(HMODULE hModule, void* load_addr, const char *module_name)
 130 {
 131     DBG_MODULE* wmod = DEBUG_AddModule(module_name, DM_TYPE_NE, load_addr, hModule);
 132
 133     if (!wmod) return NULL;
 134
 135     wmod->status = DM_STATUS_LOADED;
 136     DEBUG_CurrProcess->next_index++;
 137     return wmod;
 138 }
 139
 140 /***********************************************************************
 141  *           DEBUG_GetEP16
 142  *
 143  * Helper function fo DEBUG_LoadModuleEPs16:
 144  *      finds the address of a given entry point from a given module
 145  */
 146 static BOOL DEBUG_GetEP16(char* moduleAddr, const NE_MODULE* module,
 147                           WORD ordinal, DBG_ADDR* addr)
 148 {
 149     void*               idx;
 150     ET_ENTRY            entry;
 151     ET_BUNDLE           bundle;
 152     SEGTABLEENTRY       ste;
 153
 154     bundle.next = module->entry_table;
 155     do {
 156         if (!bundle.next)
 157             return FALSE;
 158         idx = moduleAddr + bundle.next;
 159         if (!DEBUG_READ_MEM_VERBOSE(idx, &bundle, sizeof(bundle)))
 160             return FALSE;
 161     } while ((ordinal < bundle.first + 1) || (ordinal > bundle.last));
 162
 163     if (!DEBUG_READ_MEM_VERBOSE((char*)idx + sizeof(ET_BUNDLE) +
 164                                 (ordinal - bundle.first - 1) * sizeof(ET_ENTRY),
 165                                 &entry, sizeof(ET_ENTRY)))
 166         return FALSE;
 167
 168     addr->seg = entry.segnum;
 169     addr->off = entry.offs;
 170
 171     if (addr->seg == 0xfe) addr->seg = 0xffff;  /* constant entry */
 172     else {
 173         if (!DEBUG_READ_MEM_VERBOSE(moduleAddr + module->seg_table +
 174                                     sizeof(ste) * (addr->seg - 1),
 175                                     &ste, sizeof(ste)))
 176             return FALSE;
 177         addr->seg = GlobalHandleToSel16(ste.hSeg);
 178     }
 179     return TRUE;
 180 }
 181
 182 /***********************************************************************
 183  *           DEBUG_LoadModule16
 184  *
 185  * Load the entry points of a Win16 module into the hash table.
 186  */
 187 static void DEBUG_LoadModule16(HMODULE hModule, NE_MODULE* module, char* moduleAddr, const char* name)
 188 {
 189     DBG_VALUE   value;
 190     BYTE        buf[1 + 256 + 2];
 191     char        epname[512];
 192     char*       cpnt;
 193     DBG_MODULE* wmod;
 194
 195     wmod = DEBUG_RegisterNEModule(hModule, moduleAddr, name);
 196
 197     value.type = NULL;
 198     value.cookie = DV_TARGET;
 199     value.addr.seg = 0;
 200     value.addr.off = 0;
 201
 202     cpnt = moduleAddr + module->name_table;
 203
 204     /* First search the resident names */
 205
 206     /* skip module name */
 207     if (!DEBUG_READ_MEM_VERBOSE(cpnt, buf, sizeof(buf)) || !buf[0])
 208         return;
 209     cpnt += 1 + buf[0] + sizeof(WORD);
 210
 211     while (DEBUG_READ_MEM_VERBOSE(cpnt, buf, sizeof(buf)) && buf[0]) {
 212         sprintf(epname, "%s.%.*s", name, buf[0], &buf[1]);
 213         if (DEBUG_GetEP16(moduleAddr, module, *(WORD*)&buf[1 + buf[0]], &value.addr)) {
 214             DEBUG_AddSymbol(epname, &value, NULL, SYM_WIN32 | SYM_FUNC);
 215         }
 216         cpnt += buf[0] + 1 + sizeof(WORD);
 217     }
 218
 219     /* Now search the non-resident names table */
 220     if (!module->nrname_handle) return;  /* No non-resident table */
 221     cpnt = (char *)GlobalLock16(module->nrname_handle);
 222     while (DEBUG_READ_MEM_VERBOSE(cpnt, buf, sizeof(buf)) && buf[0]) {
 223         sprintf(epname, "%s.%.*s", name, buf[0], &buf[1]);
 224         if (DEBUG_GetEP16(moduleAddr, module, *(WORD*)&buf[1 + buf[0]], &value.addr)) {
 225             DEBUG_AddSymbol(epname, &value, NULL, SYM_WIN32 | SYM_FUNC);
 226         }
 227         cpnt += buf[0] + 1 + sizeof(WORD);
 228     }
 229     GlobalUnlock16(module->nrname_handle);
 230 }
 231
 232 /***********************************************************************
 233  *                      DEBUG_LoadModule32
 234  */
 235 void    DEBUG_LoadModule32(const char* name, HANDLE hFile, DWORD base)
 236 {
 237     DBG_VALUE                   value;
 238     char                        buffer[256];
 239     char                        bufstr[256];
 240     int                         i;
 241     IMAGE_NT_HEADERS            pe_header;
 242     DWORD                       pe_header_ofs;
 243     IMAGE_SECTION_HEADER        pe_seg;
 244     DWORD                       pe_seg_ofs;
 245     IMAGE_DATA_DIRECTORY        dir;
 246     DWORD                       dir_ofs;
 247     DBG_MODULE*                 wmod;
 248
 249     /* FIXME: we make the assumption that hModule == base */
 250     wmod = DEBUG_RegisterPEModule((HMODULE)base, base, name);
 251
 252     DEBUG_Printf(DBG_CHN_TRACE, "Registring 32bit DLL '%s' at %08lx\n", name, base);
 253
 254     value.type = NULL;
 255     value.cookie = DV_TARGET;
 256     value.addr.seg = 0;
 257     value.addr.off = 0;
 258
 259     /* grab PE Header */
 260     if (!DEBUG_READ_MEM_VERBOSE((void*)(base + OFFSET_OF(IMAGE_DOS_HEADER, e_lfanew)),
 261                                 &pe_header_ofs, sizeof(pe_header_ofs)) ||
 262         !DEBUG_READ_MEM_VERBOSE((void*)(base + pe_header_ofs),
 263                                 &pe_header, sizeof(pe_header)))
 264         return;
 265
 266     if (wmod) {
 267         DEBUG_RegisterStabsDebugInfo(wmod, hFile, &pe_header, pe_header_ofs);
 268         DEBUG_RegisterMSCDebugInfo(wmod, hFile, &pe_header, pe_header_ofs);
 269     }
 270
 271     /* Add start of DLL */
 272     value.addr.off = base;
 273     DEBUG_AddSymbol(name, &value, NULL, SYM_WIN32 | SYM_FUNC);
 274
 275     /* Add entry point */
 276     sprintf(buffer, "%s.EntryPoint", name);
 277     value.addr.off = base + pe_header.OptionalHeader.AddressOfEntryPoint;
 278     DEBUG_AddSymbol(buffer, &value, NULL, SYM_WIN32 | SYM_FUNC);
 279
 280     /* Add start of sections */
 281     pe_seg_ofs = pe_header_ofs + OFFSET_OF(IMAGE_NT_HEADERS, OptionalHeader) +
 282         pe_header.FileHeader.SizeOfOptionalHeader;
 283
 284     for (i = 0; i < pe_header.FileHeader.NumberOfSections; i++, pe_seg_ofs += sizeof(pe_seg)) {
 285         if (!DEBUG_READ_MEM_VERBOSE((void*)(base + pe_seg_ofs), &pe_seg, sizeof(pe_seg)))
 286             continue;
 287         sprintf(buffer, "%s.%s", name, pe_seg.Name);
 288         value.addr.off = base + pe_seg.VirtualAddress;
 289         DEBUG_AddSymbol(buffer, &value, NULL, SYM_WIN32 | SYM_FUNC);
 290     }
 291
 292     /* Add exported functions */
 293     dir_ofs = pe_header_ofs +
 294         OFFSET_OF(IMAGE_NT_HEADERS,
 295                   OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT]);
 296     if (DEBUG_READ_MEM_VERBOSE((void*)(base + dir_ofs), &dir, sizeof(dir)) && dir.Size) {
 297         IMAGE_EXPORT_DIRECTORY  exports;
 298         WORD*                   ordinals = NULL;
 299         void**                  functions = NULL;
 300         DWORD*                  names = NULL;
 301         int                     j;
 302
 303         if (DEBUG_READ_MEM_VERBOSE((void*)(base + dir.VirtualAddress),
 304                                    &exports, sizeof(exports)) &&
 305
 306             ((functions = DBG_alloc(sizeof(functions[0]) * exports.NumberOfFunctions))) &&
 307             DEBUG_READ_MEM_VERBOSE((void*)(base + (DWORD)exports.AddressOfFunctions),
 308                                    functions, sizeof(functions[0]) * exports.NumberOfFunctions) &&
 309
 310             ((ordinals = DBG_alloc(sizeof(ordinals[0]) * exports.NumberOfNames))) &&
 311             DEBUG_READ_MEM_VERBOSE((void*)(base + (DWORD)exports.AddressOfNameOrdinals),
 312                                    ordinals, sizeof(ordinals[0]) * exports.NumberOfNames) &&
 313
 314             ((names = DBG_alloc(sizeof(names[0]) * exports.NumberOfNames))) &&
 315             DEBUG_READ_MEM_VERBOSE((void*)(base + (DWORD)exports.AddressOfNames),
 316                                    names, sizeof(names[0]) * exports.NumberOfNames)) {
 317
 318             for (i = 0; i < exports.NumberOfNames; i++) {
 319                 if (!names[i] ||
 320                     !DEBUG_READ_MEM_VERBOSE((void*)(base + names[i]), bufstr, sizeof(bufstr)))
 321                     continue;
 322                 bufstr[sizeof(bufstr) - 1] = 0;
 323                 sprintf(buffer, "%s.%s", name, bufstr);
 324                 value.addr.off = base + (DWORD)functions[ordinals[i]];
 325                 DEBUG_AddSymbol(buffer, &value, NULL, SYM_WIN32 | SYM_FUNC);
 326             }
 327
 328             for (i = 0; i < exports.NumberOfFunctions; i++) {
 329                 if (!functions[i]) continue;
 330                 /* Check if we already added it with a name */
 331                 for (j = 0; j < exports.NumberOfNames; j++)
 332                     if ((ordinals[j] == i) && names[j]) break;
 333                 if (j < exports.NumberOfNames) continue;
 334                 sprintf(buffer, "%s.%ld", name, i + exports.Base);
 335                 value.addr.off = base + (DWORD)functions[i];
 336                 DEBUG_AddSymbol(buffer, &value, NULL, SYM_WIN32 | SYM_FUNC);
 337             }
 338         }
 339         DBG_free(functions);
 340         DBG_free(ordinals);
 341         DBG_free(names);
 342     }
 343 }
 344
 345 /***********************************************************************
 346  *              DEBUG_LoadEntryPoints
 347  *
 348  * Load the entry points of all the modules into the hash table.
 349  */
 350 int DEBUG_LoadEntryPoints(const char* pfx)
 351 {
 352     MODULEENTRY entry;
 353     NE_MODULE   module;
 354     void*       moduleAddr;
 355     int         first = 0;
 356     int         rowcount = 0;
 357     int         len;
 358
 359     /* FIXME: we assume that a module is never removed from memory */
 360     /* FIXME: this is (currently plain wrong when debugger is started by
 361      *        attaching to an existing program => the 16 bit modules will
 362      *        not be shared... not much to do on debugger side... sigh
 363      */
 364     if (ModuleFirst16(&entry)) do {
 365         if (DEBUG_FindModuleByName(entry.szModule, DM_TYPE_UNKNOWN) ||
 366             !(moduleAddr = NE_GetPtr(entry.hModule)) ||
 367             !DEBUG_READ_MEM_VERBOSE(moduleAddr, &module, sizeof(module)) ||
 368             (module.flags & NE_FFLAGS_WIN32) /* NE module */)
 369             continue;
 370         if (!first) {
 371             if (pfx) DEBUG_Printf(DBG_CHN_MESG, pfx);
 372             DEBUG_Printf(DBG_CHN_MESG, "   ");
 373             rowcount = 3 + (pfx ? strlen(pfx) : 0);
 374             first = 1;
 375         }
 376
 377         len = strlen(entry.szModule);
 378         if ((rowcount + len) > 76) {
 379             DEBUG_Printf(DBG_CHN_MESG, "\n   ");
 380             rowcount = 3;
 381         }
 382         DEBUG_Printf(DBG_CHN_MESG, " %s", entry.szModule);
 383         rowcount += len + 1;
 384
 385         DEBUG_LoadModule16(entry.hModule, &module, moduleAddr, entry.szModule);
 386     } while (ModuleNext16(&entry));
 387
 388     if (first) DEBUG_Printf(DBG_CHN_MESG, "\n");
 389     return first;
 390 }
 391
 392 /***********************************************************************
 393  *           DEBUG_InfoShare
 394  *
 395  * Display shared libarary information.
 396  */
 397 void DEBUG_InfoShare(void)
 398 {
 399     DBG_MODULE* wmod;
 400     const char* xtype;
 401
 402     DEBUG_Printf(DBG_CHN_MESG, "Address\t\tModule\tName\n");
 403
 404     for (wmod = DEBUG_CurrProcess->modules; wmod; wmod = wmod->next) {
 405         switch (wmod->type) {
 406         case DM_TYPE_NE:        xtype = "NE"; break;
 407         case DM_TYPE_PE:        xtype = "PE"; break;
 408         case DM_TYPE_ELF:       xtype = "ELF"; break;
 409         default:                xtype = "???"; break;
 410         }
 411         DEBUG_Printf(DBG_CHN_MESG, "0x%8.8x\t(%s)\t%s\n", (unsigned int)wmod->load_addr,
 412                      xtype, wmod->module_name);
 413     }
 414 }
 415
 416 static const char*      DEBUG_GetModuleType(int type)
 417 {
 418     switch (type) {
 419     case DM_TYPE_NE:    return "NE";
 420     case DM_TYPE_PE:    return "PE";
 421     case DM_TYPE_ELF:   return "ELF";
 422     default:            return "???";;
 423     }
 424 }
 425
 426 static const char*      DEBUG_GetModuleStatus(int status)
 427 {
 428     switch (status) {
 429     case DM_STATUS_NEW:         return "deferred";
 430     case DM_STATUS_LOADED:      return "ok";
 431     case DM_STATUS_ERROR:       return "error";
 432     default:                    return "???";
 433     }
 434 }
 435
 436 /***********************************************************************
 437  *           DEBUG_
 438  * Display information about a given module (DLL or EXE)
 439  */
 440 void DEBUG_DumpModule(DWORD mod)
 441 {
 442     DBG_MODULE* wmod;
 443
 444     if (!(wmod = DEBUG_FindModuleByHandle(mod, DM_TYPE_UNKNOWN)) &&
 445         !(wmod = DEBUG_FindModuleByAddr((void*)mod, DM_TYPE_UNKNOWN))) {
 446         DEBUG_Printf(DBG_CHN_MESG, "'0x%08lx' is not a valid module handle or address\n", mod);
 447         return;
 448     }
 449
 450     DEBUG_Printf(DBG_CHN_MESG, "Module '%s' (handle=0x%08x) at 0x%8.8x (%s/%s)\n",
 451                  wmod->module_name, wmod->handle, (unsigned int)wmod->load_addr,
 452                  DEBUG_GetModuleType(wmod->type), DEBUG_GetModuleStatus(wmod->status));
 453 }
 454
 455 /***********************************************************************
 456  *           DEBUG_WalkModules
 457  *
 458  * Display information about all modules (DLLs and EXEs)
 459  */
 460 void DEBUG_WalkModules(void)
 461 {
 462     DBG_MODULE* wmod;
 463     const char* xtype;
 464
 465     DEBUG_Printf(DBG_CHN_MESG, "Address\t\tModule\tName\n");
 466
 467     for (wmod = DEBUG_CurrProcess->modules; wmod; wmod = wmod->next) {
 468         switch (wmod->type) {
 469         case DM_TYPE_NE:        xtype = "NE"; break;
 470         case DM_TYPE_PE:        xtype = "PE"; break;
 471         case DM_TYPE_ELF:       continue;
 472         default:                xtype = "???"; break;
 473         }
 474
 475         DEBUG_Printf(DBG_CHN_MESG, "0x%8.8x\t(%s)\t%s\n",
 476                      (unsigned int)wmod->load_addr, DEBUG_GetModuleType(wmod->type),
 477                      wmod->module_name);
 478     }
 479 }
 480