401 lines
14 KiB
C
401 lines
14 KiB
C
/*
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* File pe_module.c - handle PE module information
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*
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* Copyright (C) 1996, Eric Youngdale.
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* Copyright (C) 1999-2000, Ulrich Weigand.
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* Copyright (C) 2004, Eric Pouech.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "dbghelp_private.h"
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#include "winreg.h"
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#include "winternl.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
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/******************************************************************
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* pe_load_stabs
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*
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* look for stabs information in PE header (it's how the mingw compiler provides
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* its debugging information)
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*/
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static SYM_TYPE pe_load_stabs(const struct process* pcs, struct module* module,
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const void* mapping, IMAGE_NT_HEADERS* nth)
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{
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IMAGE_SECTION_HEADER* section;
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int i, stabsize = 0, stabstrsize = 0;
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unsigned int stabs = 0, stabstr = 0;
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SYM_TYPE sym_type = SymNone;
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section = (IMAGE_SECTION_HEADER*)
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((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
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for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
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{
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if (!strcasecmp(section->Name, ".stab"))
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{
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stabs = section->VirtualAddress;
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stabsize = section->SizeOfRawData;
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}
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else if (!strncasecmp(section->Name, ".stabstr", 8))
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{
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stabstr = section->VirtualAddress;
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stabstrsize = section->SizeOfRawData;
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}
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}
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if (stabstrsize && stabsize)
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{
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sym_type = stabs_parse(module, mapping, module->module.BaseOfImage,
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stabs, stabsize, stabstr, stabstrsize);
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}
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return sym_type;
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}
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/******************************************************************
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* pe_load_dbg_file
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*
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* loads a .dbg file
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*/
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static SYM_TYPE pe_load_dbg_file(const struct process* pcs, struct module* module,
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char* dbg_name, DWORD timestamp)
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{
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char tmp[MAX_PATH];
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HANDLE hFile, hMap = 0;
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const BYTE* dbg_mapping = NULL;
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PIMAGE_SEPARATE_DEBUG_HEADER hdr;
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PIMAGE_DEBUG_DIRECTORY dbg;
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SYM_TYPE sym_type = -1;
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WINE_TRACE("Processing DBG file %s\n", dbg_name);
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if ((hFile = FindDebugInfoFile(dbg_name, pcs->search_path, tmp)) != NULL &&
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((hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
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((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
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{
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hdr = (PIMAGE_SEPARATE_DEBUG_HEADER)dbg_mapping;
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if (hdr->TimeDateStamp != timestamp)
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{
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WINE_ERR("Warning - %s has incorrect internal timestamp\n",
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dbg_name);
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/*
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* Well, sometimes this happens to DBG files which ARE REALLY the
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* right .DBG files but nonetheless this check fails. Anyway,
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* WINDBG (debugger for Windows by Microsoft) loads debug symbols
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* which have incorrect timestamps.
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*/
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}
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dbg = (PIMAGE_DEBUG_DIRECTORY)
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(dbg_mapping + sizeof(*hdr) +
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hdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) +
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hdr->ExportedNamesSize);
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sym_type = pe_load_debug_directory(pcs, module, dbg_mapping, dbg,
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hdr->DebugDirectorySize / sizeof(*dbg));
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}
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else
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{
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WINE_ERR("-Unable to peruse .DBG file %s (%s)\n",
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dbg_name, debugstr_a(tmp));
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}
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if (dbg_mapping) UnmapViewOfFile((void*)dbg_mapping);
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if (hMap) CloseHandle(hMap);
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if (hFile != NULL) CloseHandle(hFile);
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return sym_type;
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}
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/******************************************************************
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* pe_load_msc_debug_info
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*
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* Process MSC debug information in PE file.
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*/
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static SYM_TYPE pe_load_msc_debug_info(const struct process* pcs,
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struct module* module,
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const void* mapping, IMAGE_NT_HEADERS* nth)
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{
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SYM_TYPE sym_type = -1;
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PIMAGE_DATA_DIRECTORY dir;
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PIMAGE_DEBUG_DIRECTORY dbg = NULL;
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int nDbg;
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/* Read in debug directory */
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dir = nth->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_DEBUG;
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nDbg = dir->Size / sizeof(IMAGE_DEBUG_DIRECTORY);
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if (!nDbg) return sym_type;
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dbg = (PIMAGE_DEBUG_DIRECTORY)((char*)mapping + dir->VirtualAddress);
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/* Parse debug directory */
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if (nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED)
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{
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/* Debug info is stripped to .DBG file */
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PIMAGE_DEBUG_MISC misc = (PIMAGE_DEBUG_MISC)
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((char*)mapping + dbg->PointerToRawData);
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if (nDbg != 1 || dbg->Type != IMAGE_DEBUG_TYPE_MISC ||
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misc->DataType != IMAGE_DEBUG_MISC_EXENAME)
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{
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WINE_ERR("-Debug info stripped, but no .DBG file in module %s\n",
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module->module.ModuleName);
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}
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else
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{
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sym_type = pe_load_dbg_file(pcs, module, misc->Data, nth->FileHeader.TimeDateStamp);
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}
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}
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else
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{
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/* Debug info is embedded into PE module */
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sym_type = pe_load_debug_directory(pcs, module, mapping, dbg, nDbg);
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}
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return sym_type;
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}
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/***********************************************************************
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* pe_load_export_debug_info
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*/
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static SYM_TYPE pe_load_export_debug_info(const struct process* pcs,
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struct module* module,
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const void* mapping, IMAGE_NT_HEADERS* nth)
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{
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char buffer[512];
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unsigned int i;
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IMAGE_DATA_DIRECTORY* dir;
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DWORD base = module->module.BaseOfImage;
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ADDRESS addr;
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addr.Mode = AddrModeFlat;
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addr.Segment = 0;
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#if 0
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/* Add start of DLL (better use the (yet unimplemented) Exe SymTag for this) */
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/* FIXME: module.ModuleName isn't correctly set yet if it's passed in SymLoadModule */
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symt_new_public(module, NULL, module->module.ModuleName, base, 0,
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TRUE /* FIXME */, TRUE /* FIXME */);
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#endif
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/* Add entry point */
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snprintf(buffer, sizeof(buffer), "%s.EntryPoint", module->module.ModuleName);
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symt_new_public(module, NULL, buffer,
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base + nth->OptionalHeader.AddressOfEntryPoint, 0,
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TRUE /* FIXME */, TRUE /* FIXME */);
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#if 0
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IMAGE_SECTION_HEADER* section;
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/* Add start of sections */
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section = (IMAGE_SECTION_HEADER*)
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((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
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for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
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{
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snprintf(buffer, sizeof(buffer), "%s.%s",
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module->module.ModuleName, section->Name);
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symt_new_public(module, NULL, buffer, base + section->VirtualAddress, 0,
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TRUE /* FIXME */, TRUE /* FIXME */);
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}
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#endif
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/* Add exported functions */
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if ((dir = RtlImageDirectoryEntryToData((void*)mapping, TRUE,
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IMAGE_DIRECTORY_ENTRY_EXPORT, NULL)))
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{
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IMAGE_EXPORT_DIRECTORY* exports;
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WORD* ordinals = NULL;
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void** functions = NULL;
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DWORD* names = NULL;
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unsigned int j;
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exports = (void*)((char*)mapping + dir->VirtualAddress);
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functions = (void*)((char*)mapping + exports->AddressOfFunctions);
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ordinals = (void*)((char*)mapping + exports->AddressOfNameOrdinals);
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names = (void*)((char*)mapping + exports->AddressOfNames);
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for (i = 0; i < exports->NumberOfNames; i++)
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{
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if (!names[i]) continue;
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snprintf(buffer, sizeof(buffer), "%s.%s",
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module->module.ModuleName, (char*)base + names[i]);
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symt_new_public(module, NULL, buffer,
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base + (DWORD)functions[ordinals[i]], 0,
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TRUE /* FIXME */, TRUE /* FIXME */);
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}
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for (i = 0; i < exports->NumberOfFunctions; i++)
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{
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if (!functions[i]) continue;
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/* Check if we already added it with a name */
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for (j = 0; j < exports->NumberOfNames; j++)
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if ((ordinals[j] == i) && names[j]) break;
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if (j < exports->NumberOfNames) continue;
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snprintf(buffer, sizeof(buffer), "%s.%ld",
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module->module.ModuleName, i + exports->Base);
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symt_new_public(module, NULL, buffer, base + (DWORD)functions[i], 0,
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TRUE /* FIXME */, TRUE /* FIXME */);
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}
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}
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/* no real debug info, only entry points */
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return module->module.SymType = SymExport;
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}
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/******************************************************************
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* pe_load_debug_info
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*
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*/
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SYM_TYPE pe_load_debug_info(const struct process* pcs, struct module* module)
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{
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SYM_TYPE sym_type = -1;
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HANDLE hFile;
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HANDLE hMap;
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void* mapping;
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IMAGE_NT_HEADERS* nth;
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hFile = CreateFileA(module->module.LoadedImageName, GENERIC_READ, FILE_SHARE_READ,
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NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile == INVALID_HANDLE_VALUE) return -1;
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if ((hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0)
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{
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if ((mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL)
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{
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nth = RtlImageNtHeader(mapping);
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if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
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{
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sym_type = pe_load_stabs(pcs, module, mapping, nth);
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if (sym_type <= SymNone)
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sym_type = pe_load_msc_debug_info(pcs, module, mapping, nth);
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/* if we still have no debug info (we could only get SymExport at this
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* point), then do the SymExport except if we have an ELF container,
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* in which case we'll rely on the export's on the ELF side
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*/
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}
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if (sym_type <= SymNone && !module_get_debug(pcs, module))
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sym_type = pe_load_export_debug_info(pcs, module, mapping, nth);
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UnmapViewOfFile(mapping);
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}
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CloseHandle(hMap);
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}
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CloseHandle(hFile);
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module->module.SymType = (sym_type >= SymNone) ? sym_type : SymNone;
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return sym_type;
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}
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/******************************************************************
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* pe_load_module
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*
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*/
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struct module* pe_load_module(struct process* pcs, char* name,
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HANDLE hFile, DWORD base, DWORD size)
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{
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struct module* module = NULL;
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BOOL opened = FALSE;
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HANDLE hMap;
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void* mapping;
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char loaded_name[MAX_PATH];
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loaded_name[0] = '\0';
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if (!hFile)
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{
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if (!name)
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{
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/* FIXME SetLastError */
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return NULL;
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}
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if ((hFile = FindExecutableImage(name, NULL, loaded_name)) == NULL)
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return NULL;
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opened = TRUE;
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}
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else if (name) strcpy(loaded_name, name);
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else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
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FIXME("Trouble ahead (no module name passed in deferred mode)\n");
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if ((hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0)
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{
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if ((mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL)
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{
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IMAGE_NT_HEADERS* nth = RtlImageNtHeader(mapping);
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if (nth)
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{
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if (!base) base = nth->OptionalHeader.ImageBase;
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if (!size) size = nth->OptionalHeader.SizeOfImage;
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module = module_new(pcs, loaded_name, DMT_PE, base, size,
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nth->FileHeader.TimeDateStamp,
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nth->OptionalHeader.CheckSum);
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if (module)
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{
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module->module.SymType = (dbghelp_options & SYMOPT_DEFERRED_LOADS) ?
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SymDeferred : pe_load_debug_info(pcs, module);
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}
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}
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UnmapViewOfFile(mapping);
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}
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CloseHandle(hMap);
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}
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if (opened) CloseHandle(hFile);
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return module;
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}
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/******************************************************************
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* pe_load_module_from_pcs
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*
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*/
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struct module* pe_load_module_from_pcs(struct process* pcs, const char* name,
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const char* mod_name, DWORD base, DWORD size)
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{
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struct module* module;
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const char* ptr;
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if ((module = module_find_by_name(pcs, name, DMT_PE))) return module;
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if (mod_name) ptr = mod_name;
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else
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{
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for (ptr = name + strlen(name) - 1; ptr >= name; ptr--)
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{
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if (*ptr == '/' || *ptr == '\\')
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{
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ptr++;
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break;
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}
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}
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}
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if (ptr && (module = module_find_by_name(pcs, ptr, DMT_PE))) return module;
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if (base && pcs->dbg_hdr_addr)
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{
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IMAGE_DOS_HEADER dos;
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IMAGE_NT_HEADERS nth;
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if (read_mem(pcs->handle, base, &dos, sizeof(dos)) &&
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dos.e_magic == IMAGE_DOS_SIGNATURE &&
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read_mem(pcs->handle, base + dos.e_lfanew, &nth, sizeof(nth)) &&
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nth.Signature == IMAGE_NT_SIGNATURE)
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{
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if (!size) size = nth.OptionalHeader.SizeOfImage;
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module = module_new(pcs, name, DMT_PE, base, size,
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nth.FileHeader.TimeDateStamp, nth.OptionalHeader.CheckSum);
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}
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}
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return module;
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}
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