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wine/dlls/dbghelp/pe_module.c
Eric Pouech 88aa6703af dbghelp: Virtual modules. 
Rewrote virtual modules handling so that it's an option to either PE
or ELF modules rather than a specific type.
2006-02-20 12:16:08 +01:00

439 lines
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/*
* File pe_module.c - handle PE module information
*
* Copyright (C) 1996, Eric Youngdale.
* Copyright (C) 1999-2000, Ulrich Weigand.
* Copyright (C) 2004, Eric Pouech.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "dbghelp_private.h"
#include "winreg.h"
#include "winternl.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
/******************************************************************
* pe_load_stabs
*
* look for stabs information in PE header (it's how the mingw compiler provides
* its debugging information)
*/
static BOOL pe_load_stabs(const struct process* pcs, struct module* module,
const void* mapping, IMAGE_NT_HEADERS* nth)
{
IMAGE_SECTION_HEADER* section;
int i, stabsize = 0, stabstrsize = 0;
unsigned int stabs = 0, stabstr = 0;
BOOL ret = FALSE;
section = (IMAGE_SECTION_HEADER*)
((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
{
if (!strcasecmp((const char*)section->Name, ".stab"))
{
stabs = section->VirtualAddress;
stabsize = section->SizeOfRawData;
}
else if (!strncasecmp((const char*)section->Name, ".stabstr", 8))
{
stabstr = section->VirtualAddress;
stabstrsize = section->SizeOfRawData;
}
}
if (stabstrsize && stabsize)
{
ret = stabs_parse(module,
module->module.BaseOfImage - nth->OptionalHeader.ImageBase,
RtlImageRvaToVa(nth, (void*)mapping, stabs, NULL),
stabsize,
RtlImageRvaToVa(nth, (void*)mapping, stabstr, NULL),
stabstrsize);
}
return ret;
}
static BOOL CALLBACK dbg_match(char* file, void* user)
{
/* accept first file */
return FALSE;
}
/******************************************************************
* pe_load_dbg_file
*
* loads a .dbg file
*/
static BOOL pe_load_dbg_file(const struct process* pcs, struct module* module,
const char* dbg_name, DWORD timestamp)
{
char tmp[MAX_PATH];
HANDLE hFile = INVALID_HANDLE_VALUE, hMap = 0;
const BYTE* dbg_mapping = NULL;
const IMAGE_SEPARATE_DEBUG_HEADER* hdr;
const IMAGE_DEBUG_DIRECTORY* dbg;
BOOL ret = FALSE;
WINE_TRACE("Processing DBG file %s\n", dbg_name);
if (SymFindFileInPath(pcs->handle, NULL, (char*)dbg_name,
NULL, 0, 0, 0,
tmp, dbg_match, NULL) &&
(hFile = CreateFileA(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
((hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
{
hdr = (const IMAGE_SEPARATE_DEBUG_HEADER*)dbg_mapping;
if (hdr->TimeDateStamp != timestamp)
{
WINE_ERR("Warning - %s has incorrect internal timestamp\n",
dbg_name);
/*
* Well, sometimes this happens to DBG files which ARE REALLY the
* right .DBG files but nonetheless this check fails. Anyway,
* WINDBG (debugger for Windows by Microsoft) loads debug symbols
* which have incorrect timestamps.
*/
}
if (hdr->Signature == IMAGE_SEPARATE_DEBUG_SIGNATURE)
{
/* section headers come immediately after debug header */
const IMAGE_SECTION_HEADER *sectp =
(const IMAGE_SECTION_HEADER*)(hdr + 1);
/* and after that and the exported names comes the debug directory */
dbg = (const IMAGE_DEBUG_DIRECTORY*)
(dbg_mapping + sizeof(*hdr) +
hdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) +
hdr->ExportedNamesSize);
ret = pe_load_debug_directory(pcs, module, dbg_mapping, sectp,
hdr->NumberOfSections, dbg,
hdr->DebugDirectorySize / sizeof(*dbg));
}
else
ERR("Wrong signature in .DBG file %s\n", debugstr_a(tmp));
}
else
WINE_ERR("-Unable to peruse .DBG file %s (%s)\n", dbg_name, debugstr_a(tmp));
if (dbg_mapping) UnmapViewOfFile((void*)dbg_mapping);
if (hMap) CloseHandle(hMap);
if (hFile != NULL) CloseHandle(hFile);
return ret;
}
/******************************************************************
* pe_load_msc_debug_info
*
* Process MSC debug information in PE file.
*/
static BOOL pe_load_msc_debug_info(const struct process* pcs,
struct module* module,
const void* mapping, IMAGE_NT_HEADERS* nth)
{
BOOL ret = FALSE;
const IMAGE_DATA_DIRECTORY* dir;
const IMAGE_DEBUG_DIRECTORY*dbg = NULL;
int nDbg;
/* Read in debug directory */
dir = nth->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_DEBUG;
nDbg = dir->Size / sizeof(IMAGE_DEBUG_DIRECTORY);
if (!nDbg) return FALSE;
dbg = RtlImageRvaToVa(nth, (void*)mapping, dir->VirtualAddress, NULL);
/* Parse debug directory */
if (nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED)
{
/* Debug info is stripped to .DBG file */
const IMAGE_DEBUG_MISC* misc = (const IMAGE_DEBUG_MISC*)
((const char*)mapping + dbg->PointerToRawData);
if (nDbg != 1 || dbg->Type != IMAGE_DEBUG_TYPE_MISC ||
misc->DataType != IMAGE_DEBUG_MISC_EXENAME)
{
WINE_ERR("-Debug info stripped, but no .DBG file in module %s\n",
module->module.ModuleName);
}
else
{
ret = pe_load_dbg_file(pcs, module, (const char*)misc->Data, nth->FileHeader.TimeDateStamp);
}
}
else
{
const IMAGE_SECTION_HEADER *sectp = (const IMAGE_SECTION_HEADER*)((const char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
/* Debug info is embedded into PE module */
ret = pe_load_debug_directory(pcs, module, mapping, sectp,
nth->FileHeader.NumberOfSections, dbg, nDbg);
}
return ret;
}
/***********************************************************************
* pe_load_export_debug_info
*/
static BOOL pe_load_export_debug_info(const struct process* pcs,
struct module* module,
const void* mapping, IMAGE_NT_HEADERS* nth)
{
unsigned int i;
const IMAGE_EXPORT_DIRECTORY* exports;
DWORD base = module->module.BaseOfImage;
DWORD size;
if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
#if 0
/* Add start of DLL (better use the (yet unimplemented) Exe SymTag for this) */
/* FIXME: module.ModuleName isn't correctly set yet if it's passed in SymLoadModule */
symt_new_public(module, NULL, module->module.ModuleName, base, 1,
TRUE /* FIXME */, TRUE /* FIXME */);
#endif
/* Add entry point */
symt_new_public(module, NULL, "EntryPoint",
base + nth->OptionalHeader.AddressOfEntryPoint, 1,
TRUE, TRUE);
#if 0
/* FIXME: we'd better store addresses linked to sections rather than
absolute values */
IMAGE_SECTION_HEADER* section;
/* Add start of sections */
section = (IMAGE_SECTION_HEADER*)
((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
{
symt_new_public(module, NULL, section->Name,
RtlImageRvaToVa(nth, (void*)mapping, section->VirtualAddress, NULL),
1, TRUE /* FIXME */, TRUE /* FIXME */);
}
#endif
/* Add exported functions */
if ((exports = RtlImageDirectoryEntryToData((void*)mapping, FALSE,
IMAGE_DIRECTORY_ENTRY_EXPORT, &size)))
{
const WORD* ordinals = NULL;
const DWORD_PTR* functions = NULL;
const DWORD* names = NULL;
unsigned int j;
char buffer[16];
functions = RtlImageRvaToVa(nth, (void*)mapping, exports->AddressOfFunctions, NULL);
ordinals = RtlImageRvaToVa(nth, (void*)mapping, exports->AddressOfNameOrdinals, NULL);
names = RtlImageRvaToVa(nth, (void*)mapping, exports->AddressOfNames, NULL);
for (i = 0; i < exports->NumberOfNames; i++)
{
if (!names[i]) continue;
symt_new_public(module, NULL,
RtlImageRvaToVa(nth, (void*)mapping, names[i], NULL),
base + functions[ordinals[i]],
1, TRUE /* FIXME */, TRUE /* FIXME */);
}
for (i = 0; i < exports->NumberOfFunctions; i++)
{
if (!functions[i]) continue;
/* Check if we already added it with a name */
for (j = 0; j < exports->NumberOfNames; j++)
if ((ordinals[j] == i) && names[j]) break;
if (j < exports->NumberOfNames) continue;
snprintf(buffer, sizeof(buffer), "%ld", i + exports->Base);
symt_new_public(module, NULL, buffer, base + (DWORD)functions[i], 1,
TRUE /* FIXME */, TRUE /* FIXME */);
}
}
/* no real debug info, only entry points */
if (module->module.SymType == SymDeferred)
module->module.SymType = SymExport;
return TRUE;
}
/******************************************************************
* pe_load_debug_info
*
*/
BOOL pe_load_debug_info(const struct process* pcs, struct module* module)
{
BOOL ret = FALSE;
HANDLE hFile;
HANDLE hMap;
void* mapping;
IMAGE_NT_HEADERS* nth;
hFile = CreateFileA(module->module.LoadedImageName, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) return ret;
if ((hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0)
{
if ((mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL)
{
nth = RtlImageNtHeader(mapping);
if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
{
ret = pe_load_stabs(pcs, module, mapping, nth) ||
pe_load_msc_debug_info(pcs, module, mapping, nth);
/* if we still have no debug info (we could only get SymExport at this
* point), then do the SymExport except if we have an ELF container,
* in which case we'll rely on the export's on the ELF side
*/
}
/* FIXME shouldn't we check that? if (!module_get_debug(pcs, module))l */
if (pe_load_export_debug_info(pcs, module, mapping, nth) && !ret)
ret = TRUE;
UnmapViewOfFile(mapping);
}
CloseHandle(hMap);
}
CloseHandle(hFile);
return ret;
}
/******************************************************************
* pe_load_module
*
*/
struct module* pe_load_module(struct process* pcs, const char* name,
HANDLE hFile, DWORD base, DWORD size)
{
struct module* module = NULL;
BOOL opened = FALSE;
HANDLE hMap;
void* mapping;
char loaded_name[MAX_PATH];
loaded_name[0] = '\0';
if (!hFile)
{
if (!name)
{
/* FIXME SetLastError */
return NULL;
}
if ((hFile = FindExecutableImage(name, pcs->search_path, loaded_name)) == NULL)
return NULL;
opened = TRUE;
}
else if (name) strcpy(loaded_name, name);
else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
FIXME("Trouble ahead (no module name passed in deferred mode)\n");
if (!(module = module_find_by_name(pcs, loaded_name, DMT_PE)) &&
(hMap = CreateFileMappingA(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != NULL)
{
if ((mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL)
{
IMAGE_NT_HEADERS* nth = RtlImageNtHeader(mapping);
if (nth)
{
if (!base) base = nth->OptionalHeader.ImageBase;
if (!size) size = nth->OptionalHeader.SizeOfImage;
module = module_new(pcs, loaded_name, DMT_PE, FALSE, base, size,
nth->FileHeader.TimeDateStamp,
nth->OptionalHeader.CheckSum);
if (module)
{
if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
module->module.SymType = SymDeferred;
else
pe_load_debug_info(pcs, module);
}
}
UnmapViewOfFile(mapping);
}
CloseHandle(hMap);
}
if (opened) CloseHandle(hFile);
return module;
}
/******************************************************************
* pe_load_nt_header
*
*/
BOOL pe_load_nt_header(HANDLE hProc, DWORD base, IMAGE_NT_HEADERS* nth)
{
IMAGE_DOS_HEADER dos;
return ReadProcessMemory(hProc, (char*)base, &dos, sizeof(dos), NULL) &&
dos.e_magic == IMAGE_DOS_SIGNATURE &&
ReadProcessMemory(hProc, (char*)(base + dos.e_lfanew),
nth, sizeof(*nth), NULL) &&
nth->Signature == IMAGE_NT_SIGNATURE;
}
/******************************************************************
* pe_load_module_from_pcs
*
*/
struct module* pe_load_module_from_pcs(struct process* pcs, const char* name,
const char* mod_name, DWORD base, DWORD size)
{
struct module* module;
const char* ptr;
if ((module = module_find_by_name(pcs, name, DMT_PE))) return module;
if (mod_name) ptr = mod_name;
else
{
for (ptr = name + strlen(name) - 1; ptr >= name; ptr--)
{
if (*ptr == '/' || *ptr == '\\')
{
ptr++;
break;
}
}
}
if (ptr && (module = module_find_by_name(pcs, ptr, DMT_PE))) return module;
if (base)
{
if (pcs->dbg_hdr_addr)
{
IMAGE_NT_HEADERS nth;
if (pe_load_nt_header(pcs->handle, base, &nth))
{
if (!size) size = nth.OptionalHeader.SizeOfImage;
module = module_new(pcs, name, DMT_PE, FALSE, base, size,
nth.FileHeader.TimeDateStamp, nth.OptionalHeader.CheckSum);
}
} else if (size)
module = module_new(pcs, name, DMT_PE, FALSE, base, size, 0 /* FIXME */, 0 /* FIXME */);
}
return module;
}
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