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Sweden-Number/dlls/dbghelp/pe_module.c

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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) 2004-2007, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "dbghelp_private.h"
#include "winternl.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
/******************************************************************
* pe_load_symbol_table
*
* Use the COFF symbol table (if any) from the IMAGE_FILE_HEADER to set the absolute address
* of global symbols.
* Mingw32 requires this for stabs debug information as address for global variables isn't filled in
* (this is similar to what is done in elf_module.c when using the .symtab ELF section)
*/
static BOOL pe_load_symbol_table(struct module* module, IMAGE_NT_HEADERS* nth, void* mapping)
{
const IMAGE_SYMBOL* isym;
int i, numsym, naux;
const char* strtable;
char tmp[9];
const char* name;
struct hash_table_iter hti;
void* ptr;
struct symt_data* sym;
const IMAGE_SECTION_HEADER* sect;
numsym = nth->FileHeader.NumberOfSymbols;
if (!nth->FileHeader.PointerToSymbolTable || !numsym)
return TRUE;
isym = (const IMAGE_SYMBOL*)((char*)mapping + nth->FileHeader.PointerToSymbolTable);
/* FIXME: no way to get strtable size */
strtable = (const char*)&isym[numsym];
sect = IMAGE_FIRST_SECTION(nth);
for (i = 0; i < numsym; i+= naux, isym += naux)
{
if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
isym->SectionNumber > 0 && isym->SectionNumber <= nth->FileHeader.NumberOfSections)
{
if (isym->N.Name.Short)
{
name = memcpy(tmp, isym->N.ShortName, 8);
tmp[8] = '\0';
}
else name = strtable + isym->N.Name.Long;
if (name[0] == '_') name++;
hash_table_iter_init(&module->ht_symbols, &hti, name);
while ((ptr = hash_table_iter_up(&hti)))
{
sym = GET_ENTRY(ptr, struct symt_data, hash_elt);
if (sym->symt.tag == SymTagData &&
(sym->kind == DataIsGlobal || sym->kind == DataIsFileStatic) &&
!strcmp(sym->hash_elt.name, name))
{
TRACE("Changing absolute address for %d.%s: %lx -> %s\n",
isym->SectionNumber, name, sym->u.var.offset,
wine_dbgstr_longlong(module->module.BaseOfImage +
sect[isym->SectionNumber - 1].VirtualAddress + isym->Value));
sym->u.var.offset = module->module.BaseOfImage +
sect[isym->SectionNumber - 1].VirtualAddress + isym->Value;
break;
}
}
}
naux = isym->NumberOfAuxSymbols + 1;
}
return TRUE;
}
static inline void* pe_get_sect(IMAGE_NT_HEADERS* nth, void* mapping,
IMAGE_SECTION_HEADER* sect)
{
return (sect) ? RtlImageRvaToVa(nth, mapping, sect->VirtualAddress, NULL) : NULL;
}
static inline DWORD pe_get_sect_size(IMAGE_SECTION_HEADER* sect)
{
return (sect) ? sect->SizeOfRawData : 0;
}
/******************************************************************
* 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,
void* mapping, IMAGE_NT_HEADERS* nth)
{
IMAGE_SECTION_HEADER* section;
IMAGE_SECTION_HEADER* sect_stabs = NULL;
IMAGE_SECTION_HEADER* sect_stabstr = NULL;
int i;
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")) sect_stabs = section;
else if (!strncasecmp((const char*)section->Name, ".stabstr", 8)) sect_stabstr = section;
}
if (sect_stabs && sect_stabstr)
{
ret = stabs_parse(module,
module->module.BaseOfImage - nth->OptionalHeader.ImageBase,
pe_get_sect(nth, mapping, sect_stabs), pe_get_sect_size(sect_stabs),
pe_get_sect(nth, mapping, sect_stabstr), pe_get_sect_size(sect_stabstr),
NULL, NULL);
if (ret) pe_load_symbol_table(module, nth, mapping);
}
TRACE("%s the STABS debug info\n", ret ? "successfully loaded" : "failed to load");
return ret;
}
/******************************************************************
* pe_load_dwarf
*
* look for dwarf information in PE header (it's also a way for the mingw compiler
* to provide its debugging information)
*/
static BOOL pe_load_dwarf(const struct process* pcs, struct module* module,
void* mapping, IMAGE_NT_HEADERS* nth)
{
IMAGE_SECTION_HEADER* section;
IMAGE_SECTION_HEADER* sect_debuginfo = NULL;
IMAGE_SECTION_HEADER* sect_debugstr = NULL;
IMAGE_SECTION_HEADER* sect_debugabbrev = NULL;
IMAGE_SECTION_HEADER* sect_debugline = NULL;
IMAGE_SECTION_HEADER* sect_debugloc = NULL;
int i;
const char* strtable;
const char* sectname;
BOOL ret = FALSE;
if (nth->FileHeader.PointerToSymbolTable && nth->FileHeader.NumberOfSymbols)
/* FIXME: no way to get strtable size */
strtable = (const char*)mapping + nth->FileHeader.PointerToSymbolTable +
nth->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
else strtable = NULL;
section = (IMAGE_SECTION_HEADER*)
((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
{
sectname = (const char*)section->Name;
/* long section names start with a '/' (at least on MinGW32) */
if (*sectname == '/' && strtable)
sectname = strtable + atoi(sectname + 1);
if (!strcasecmp(sectname, ".debug_info")) sect_debuginfo = section;
else if (!strcasecmp(sectname, ".debug_str")) sect_debugstr = section;
else if (!strcasecmp(sectname, ".debug_abbrev")) sect_debugabbrev = section;
else if (!strcasecmp(sectname, ".debug_line")) sect_debugline = section;
else if (!strcasecmp(sectname, ".debug_loc")) sect_debugloc = section;
}
if (sect_debuginfo)
{
ret = dwarf2_parse(module,
module->module.BaseOfImage - nth->OptionalHeader.ImageBase,
NULL, /* FIXME: some thunks to deal with ? */
pe_get_sect(nth, mapping, sect_debuginfo), pe_get_sect_size(sect_debuginfo),
pe_get_sect(nth, mapping, sect_debugabbrev), pe_get_sect_size(sect_debugabbrev),
pe_get_sect(nth, mapping, sect_debugstr), pe_get_sect_size(sect_debugstr),
pe_get_sect(nth, mapping, sect_debugline), pe_get_sect_size(sect_debugline),
pe_get_sect(nth, mapping, sect_debugloc), pe_get_sect_size(sect_debugloc));
}
TRACE("%s the DWARF debug info\n", ret ? "successfully loaded" : "failed to load");
return ret;
}
/******************************************************************
* 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;
BOOL ret = FALSE;
TRACE("Processing DBG file %s\n", debugstr_a(dbg_name));
if (path_find_symbol_file(pcs, dbg_name, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
(hFile = CreateFileA(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
{
const IMAGE_SEPARATE_DEBUG_HEADER* hdr;
const IMAGE_SECTION_HEADER* sectp;
const IMAGE_DEBUG_DIRECTORY* dbg;
hdr = (const IMAGE_SEPARATE_DEBUG_HEADER*)dbg_mapping;
/* section headers come immediately after debug 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("Couldn't find .DBG file %s (%s)\n", debugstr_a(dbg_name), debugstr_a(tmp));
if (dbg_mapping) UnmapViewOfFile(dbg_mapping);
if (hMap) CloseHandle(hMap);
if (hFile != INVALID_HANDLE_VALUE) 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,
void* mapping, const 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, 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",
debugstr_w(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,
void* mapping, const 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, mapping, section->VirtualAddress, NULL),
1, TRUE /* FIXME */, TRUE /* FIXME */);
}
#endif
/* Add exported functions */
if ((exports = RtlImageDirectoryEntryToData(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, mapping, exports->AddressOfFunctions, NULL);
ordinals = RtlImageRvaToVa(nth, mapping, exports->AddressOfNameOrdinals, NULL);
names = RtlImageRvaToVa(nth, mapping, exports->AddressOfNames, NULL);
if (functions && ordinals && names)
{
for (i = 0; i < exports->NumberOfNames; i++)
{
if (!names[i]) continue;
symt_new_public(module, NULL,
RtlImageRvaToVa(nth, 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), "%d", 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 = CreateFileW(module->module.LoadedImageName, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) return ret;
if ((hMap = CreateFileMappingW(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_dwarf(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_native_module
*
*/
struct module* pe_load_native_module(struct process* pcs, const WCHAR* name,
HANDLE hFile, DWORD base, DWORD size)
{
struct module* module = NULL;
BOOL opened = FALSE;
HANDLE hMap;
WCHAR loaded_name[MAX_PATH];
loaded_name[0] = '\0';
if (!hFile)
{
assert(name);
if ((hFile = FindExecutableImageExW(name, pcs->search_path, loaded_name, NULL, NULL)) == NULL)
return NULL;
opened = TRUE;
}
else if (name) strcpyW(loaded_name, name);
else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
FIXME("Trouble ahead (no module name passed in deferred mode)\n");
if ((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != NULL)
{
void* mapping;
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);
}
else
ERR("could not load the module '%s'\n", debugstr_w(loaded_name));
}
UnmapViewOfFile(mapping);
}
CloseHandle(hMap);
}
if (opened) CloseHandle(hFile);
return module;
}
/******************************************************************
* pe_load_nt_header
*
*/
BOOL pe_load_nt_header(HANDLE hProc, DWORD64 base, IMAGE_NT_HEADERS* nth)
{
IMAGE_DOS_HEADER dos;
return ReadProcessMemory(hProc, (char*)(DWORD_PTR)base, &dos, sizeof(dos), NULL) &&
dos.e_magic == IMAGE_DOS_SIGNATURE &&
ReadProcessMemory(hProc, (char*)(DWORD_PTR)(base + dos.e_lfanew),
nth, sizeof(*nth), NULL) &&
nth->Signature == IMAGE_NT_SIGNATURE;
}
/******************************************************************
* pe_load_builtin_module
*
*/
struct module* pe_load_builtin_module(struct process* pcs, const WCHAR* name,
DWORD64 base, DWORD64 size)
{
struct module* module = NULL;
if (base && 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);
}
}
return module;
}
/***********************************************************************
* ImageDirectoryEntryToDataEx (DBGHELP.@)
*
* Search for specified directory in PE image
*
* PARAMS
*
* base [in] Image base address
* image [in] TRUE - image has been loaded by loader, FALSE - raw file image
* dir [in] Target directory index
* size [out] Receives directory size
* section [out] Receives pointer to section header of section containing directory data
*
* RETURNS
* Success: pointer to directory data
* Failure: NULL
*
*/
PVOID WINAPI ImageDirectoryEntryToDataEx( PVOID base, BOOLEAN image, USHORT dir, PULONG size, PIMAGE_SECTION_HEADER *section )
{
const IMAGE_NT_HEADERS *nt;
DWORD addr;
*size = 0;
if (section) *section = NULL;
if (!(nt = RtlImageNtHeader( base ))) return NULL;
if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
*size = nt->OptionalHeader.DataDirectory[dir].Size;
if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)base + addr;
return RtlImageRvaToVa( nt, base, addr, section );
}
/***********************************************************************
* ImageDirectoryEntryToData (DBGHELP.@)
*
* NOTES
* See ImageDirectoryEntryToDataEx
*/
PVOID WINAPI ImageDirectoryEntryToData( PVOID base, BOOLEAN image, USHORT dir, PULONG size )
{
return ImageDirectoryEntryToDataEx( base, image, dir, size, NULL );
}
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