mirror of https://github.com/FWGS/xash3d-fwgs
1152 lines
30 KiB
C
1152 lines
30 KiB
C
/*
|
|
library.c - custom dlls loader
|
|
Copyright (C) 2008 Uncle Mike
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
*/
|
|
|
|
#if defined(_WIN32)
|
|
#include "common.h"
|
|
#include "library.h"
|
|
|
|
#ifdef XASH_64BIT
|
|
#include <dbghelp.h>
|
|
|
|
void *COM_LoadLibrary( const char *dllname, int build_ordinals_table )
|
|
{
|
|
return LoadLibraryA( dllname );
|
|
}
|
|
|
|
void COM_FreeLibrary( void *hInstance )
|
|
{
|
|
FreeLibrary( hInstance );
|
|
}
|
|
|
|
void *COM_GetProcAddress( void *hInstance, const char *name )
|
|
{
|
|
return GetProcAddress( hInstance, name );
|
|
}
|
|
|
|
void *COM_FunctionFromName( void *hInstance, const char *name )
|
|
{
|
|
return GetProcAddress( hInstance, name );
|
|
}
|
|
|
|
const char *COM_NameForFunction( void *hInstance, void *function )
|
|
{
|
|
#if 0
|
|
static qboolean initialized = false;
|
|
if( initialized )
|
|
{
|
|
char message[1024];
|
|
int len = 0;
|
|
size_t i;
|
|
HANDLE process = GetCurrentProcess();
|
|
HANDLE thread = GetCurrentThread();
|
|
IMAGEHLP_LINE64 line;
|
|
DWORD dline = 0;
|
|
DWORD options;
|
|
CONTEXT context;
|
|
STACKFRAME64 stackframe;
|
|
DWORD image;
|
|
char buffer[sizeof( IMAGEHLP_SYMBOL64) + MAX_SYM_NAME * sizeof(TCHAR)];
|
|
PIMAGEHLP_SYMBOL64 symbol = ( PIMAGEHLP_SYMBOL64)buffer;
|
|
memset( symbol, 0, sizeof(IMAGEHLP_SYMBOL64) + MAX_SYM_NAME );
|
|
symbol->SizeOfStruct = sizeof( IMAGEHLP_SYMBOL64);
|
|
symbol->MaxNameLength = MAX_SYM_NAME;
|
|
DWORD displacement = 0;
|
|
|
|
options = SymGetOptions();
|
|
SymSetOptions( options );
|
|
|
|
SymInitialize( process, NULL, TRUE );
|
|
|
|
if( SymGetSymFromAddr64( process, function, &displacement, symbol ) )
|
|
{
|
|
Msg( "%s\n", symbol->Name );
|
|
return copystring( symbol->Name );
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
#ifdef XASH_ALLOW_SAVERESTORE_OFFSETS
|
|
return COM_OffsetNameForFunction( function );
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
#else // XASH_64BIT
|
|
|
|
/*
|
|
---------------------------------------------------------------
|
|
|
|
Custom dlls loader
|
|
|
|
---------------------------------------------------------------
|
|
*/
|
|
|
|
#define DOS_SIGNATURE 0x5A4D // MZ
|
|
#define NT_SIGNATURE 0x00004550 // PE00
|
|
#define NUMBER_OF_DIRECTORY_ENTRIES 16
|
|
#ifndef IMAGE_SIZEOF_BASE_RELOCATION
|
|
#define IMAGE_SIZEOF_BASE_RELOCATION ( sizeof( IMAGE_BASE_RELOCATION ))
|
|
#endif
|
|
|
|
typedef struct
|
|
{
|
|
// dos .exe header
|
|
word e_magic; // magic number
|
|
word e_cblp; // bytes on last page of file
|
|
word e_cp; // pages in file
|
|
word e_crlc; // relocations
|
|
word e_cparhdr; // size of header in paragraphs
|
|
word e_minalloc; // minimum extra paragraphs needed
|
|
word e_maxalloc; // maximum extra paragraphs needed
|
|
word e_ss; // initial (relative) SS value
|
|
word e_sp; // initial SP value
|
|
word e_csum; // checksum
|
|
word e_ip; // initial IP value
|
|
word e_cs; // initial (relative) CS value
|
|
word e_lfarlc; // file address of relocation table
|
|
word e_ovno; // overlay number
|
|
word e_res[4]; // reserved words
|
|
word e_oemid; // OEM identifier (for e_oeminfo)
|
|
word e_oeminfo; // OEM information; e_oemid specific
|
|
word e_res2[10]; // reserved words
|
|
long e_lfanew; // file address of new exe header
|
|
} DOS_HEADER;
|
|
|
|
typedef struct
|
|
{
|
|
// win .exe header
|
|
word Machine;
|
|
word NumberOfSections;
|
|
dword TimeDateStamp;
|
|
dword PointerToSymbolTable;
|
|
dword NumberOfSymbols;
|
|
word SizeOfOptionalHeader;
|
|
word Characteristics;
|
|
} PE_HEADER;
|
|
|
|
typedef struct
|
|
{
|
|
dword VirtualAddress;
|
|
dword Size;
|
|
} DATA_DIRECTORY;
|
|
|
|
typedef struct
|
|
{
|
|
word Magic;
|
|
byte MajorLinkerVersion;
|
|
byte MinorLinkerVersion;
|
|
dword SizeOfCode;
|
|
dword SizeOfInitializedData;
|
|
dword SizeOfUninitializedData;
|
|
dword AddressOfEntryPoint;
|
|
dword BaseOfCode;
|
|
dword BaseOfData;
|
|
dword ImageBase;
|
|
dword SectionAlignment;
|
|
dword FileAlignment;
|
|
word MajorOperatingSystemVersion;
|
|
word MinorOperatingSystemVersion;
|
|
word MajorImageVersion;
|
|
word MinorImageVersion;
|
|
word MajorSubsystemVersion;
|
|
word MinorSubsystemVersion;
|
|
dword Win32VersionValue;
|
|
dword SizeOfImage;
|
|
dword SizeOfHeaders;
|
|
dword CheckSum;
|
|
word Subsystem;
|
|
word DllCharacteristics;
|
|
dword SizeOfStackReserve;
|
|
dword SizeOfStackCommit;
|
|
dword SizeOfHeapReserve;
|
|
dword SizeOfHeapCommit;
|
|
dword LoaderFlags;
|
|
dword NumberOfRvaAndSizes;
|
|
|
|
DATA_DIRECTORY DataDirectory[NUMBER_OF_DIRECTORY_ENTRIES];
|
|
} OPTIONAL_HEADER;
|
|
|
|
typedef struct
|
|
{
|
|
dword Characteristics;
|
|
dword TimeDateStamp;
|
|
word MajorVersion;
|
|
word MinorVersion;
|
|
dword Name;
|
|
dword Base;
|
|
dword NumberOfFunctions;
|
|
dword NumberOfNames;
|
|
dword AddressOfFunctions; // RVA from base of image
|
|
dword AddressOfNames; // RVA from base of image
|
|
dword AddressOfNameOrdinals; // RVA from base of image
|
|
} EXPORT_DIRECTORY;
|
|
|
|
typedef struct
|
|
{
|
|
PIMAGE_NT_HEADERS headers;
|
|
byte *codeBase;
|
|
void **modules;
|
|
int numModules;
|
|
int initialized;
|
|
} MEMORYMODULE, *PMEMORYMODULE;
|
|
|
|
typedef struct
|
|
{
|
|
byte Name[8]; // dos name length
|
|
|
|
union
|
|
{
|
|
dword PhysicalAddress;
|
|
dword VirtualSize;
|
|
} Misc;
|
|
|
|
dword VirtualAddress;
|
|
dword SizeOfRawData;
|
|
dword PointerToRawData;
|
|
dword PointerToRelocations;
|
|
dword PointerToLinenumbers;
|
|
word NumberOfRelocations;
|
|
word NumberOfLinenumbers;
|
|
dword Characteristics;
|
|
} SECTION_HEADER;
|
|
|
|
// Protection flags for memory pages (Executable, Readable, Writeable)
|
|
static int ProtectionFlags[2][2][2] =
|
|
{
|
|
{
|
|
{ PAGE_NOACCESS, PAGE_WRITECOPY }, // not executable
|
|
{ PAGE_READONLY, PAGE_READWRITE },
|
|
},
|
|
{
|
|
{ PAGE_EXECUTE, PAGE_EXECUTE_WRITECOPY }, // executable
|
|
{ PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE },
|
|
},
|
|
};
|
|
|
|
typedef BOOL (WINAPI *DllEntryProc)( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved );
|
|
|
|
#define GET_HEADER_DICTIONARY( module, idx ) &(module)->headers->OptionalHeader.DataDirectory[idx]
|
|
#define CALCULATE_ADDRESS( base, offset ) (((DWORD)(base)) + (offset))
|
|
|
|
static void CopySections( const byte *data, PIMAGE_NT_HEADERS old_headers, PMEMORYMODULE module )
|
|
{
|
|
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION( module->headers );
|
|
byte *codeBase = module->codeBase;
|
|
int i, size;
|
|
byte *dest;
|
|
|
|
for( i = 0; i < module->headers->FileHeader.NumberOfSections; i++, section++ )
|
|
{
|
|
if( section->SizeOfRawData == 0 )
|
|
{
|
|
// section doesn't contain data in the dll itself, but may define
|
|
// uninitialized data
|
|
size = old_headers->OptionalHeader.SectionAlignment;
|
|
|
|
if( size > 0 )
|
|
{
|
|
dest = (byte *)VirtualAlloc((byte *)CALCULATE_ADDRESS(codeBase, section->VirtualAddress), size, MEM_COMMIT, PAGE_READWRITE );
|
|
section->Misc.PhysicalAddress = (DWORD)dest;
|
|
memset( dest, 0, size );
|
|
}
|
|
// section is empty
|
|
continue;
|
|
}
|
|
|
|
// commit memory block and copy data from dll
|
|
dest = (byte *)VirtualAlloc((byte *)CALCULATE_ADDRESS(codeBase, section->VirtualAddress), section->SizeOfRawData, MEM_COMMIT, PAGE_READWRITE );
|
|
memcpy( dest, (byte *)CALCULATE_ADDRESS(data, section->PointerToRawData), section->SizeOfRawData );
|
|
section->Misc.PhysicalAddress = (DWORD)dest;
|
|
}
|
|
}
|
|
|
|
static void FreeSections( PIMAGE_NT_HEADERS old_headers, PMEMORYMODULE module )
|
|
{
|
|
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
|
|
byte *codeBase = module->codeBase;
|
|
int i, size;
|
|
|
|
for( i = 0; i < module->headers->FileHeader.NumberOfSections; i++, section++ )
|
|
{
|
|
if( section->SizeOfRawData == 0 )
|
|
{
|
|
size = old_headers->OptionalHeader.SectionAlignment;
|
|
if( size > 0 )
|
|
{
|
|
VirtualFree((byte *)CALCULATE_ADDRESS( codeBase, section->VirtualAddress ), size, MEM_DECOMMIT );
|
|
section->Misc.PhysicalAddress = 0;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
VirtualFree((byte *)CALCULATE_ADDRESS( codeBase, section->VirtualAddress ), section->SizeOfRawData, MEM_DECOMMIT );
|
|
section->Misc.PhysicalAddress = 0;
|
|
}
|
|
}
|
|
|
|
static void FinalizeSections( MEMORYMODULE *module )
|
|
{
|
|
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION( module->headers );
|
|
int i;
|
|
|
|
// loop through all sections and change access flags
|
|
for( i = 0; i < module->headers->FileHeader.NumberOfSections; i++, section++ )
|
|
{
|
|
DWORD protect, oldProtect, size;
|
|
int executable = (section->Characteristics & IMAGE_SCN_MEM_EXECUTE) != 0;
|
|
int readable = (section->Characteristics & IMAGE_SCN_MEM_READ) != 0;
|
|
int writeable = (section->Characteristics & IMAGE_SCN_MEM_WRITE) != 0;
|
|
|
|
if( section->Characteristics & IMAGE_SCN_MEM_DISCARDABLE )
|
|
{
|
|
// section is not needed any more and can safely be freed
|
|
VirtualFree((LPVOID)section->Misc.PhysicalAddress, section->SizeOfRawData, MEM_DECOMMIT);
|
|
continue;
|
|
}
|
|
|
|
// determine protection flags based on characteristics
|
|
protect = ProtectionFlags[executable][readable][writeable];
|
|
if( section->Characteristics & IMAGE_SCN_MEM_NOT_CACHED )
|
|
protect |= PAGE_NOCACHE;
|
|
|
|
// determine size of region
|
|
size = section->SizeOfRawData;
|
|
|
|
if( size == 0 )
|
|
{
|
|
if( section->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA )
|
|
size = module->headers->OptionalHeader.SizeOfInitializedData;
|
|
else if( section->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA )
|
|
size = module->headers->OptionalHeader.SizeOfUninitializedData;
|
|
}
|
|
|
|
if( size > 0 )
|
|
{
|
|
// change memory access flags
|
|
if( !VirtualProtect((LPVOID)section->Misc.PhysicalAddress, size, protect, &oldProtect ))
|
|
Sys_Error( "error protecting memory page\n" );
|
|
}
|
|
}
|
|
}
|
|
|
|
static void PerformBaseRelocation( MEMORYMODULE *module, DWORD delta )
|
|
{
|
|
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY( module, IMAGE_DIRECTORY_ENTRY_BASERELOC );
|
|
byte *codeBase = module->codeBase;
|
|
DWORD i;
|
|
|
|
if( directory->Size > 0 )
|
|
{
|
|
PIMAGE_BASE_RELOCATION relocation = (PIMAGE_BASE_RELOCATION)CALCULATE_ADDRESS( codeBase, directory->VirtualAddress );
|
|
for( ; relocation->VirtualAddress > 0; )
|
|
{
|
|
byte *dest = (byte *)CALCULATE_ADDRESS( codeBase, relocation->VirtualAddress );
|
|
word *relInfo = (word *)((byte *)relocation + IMAGE_SIZEOF_BASE_RELOCATION );
|
|
|
|
for( i = 0; i<((relocation->SizeOfBlock-IMAGE_SIZEOF_BASE_RELOCATION) / 2); i++, relInfo++ )
|
|
{
|
|
DWORD *patchAddrHL;
|
|
int type, offset;
|
|
|
|
// the upper 4 bits define the type of relocation
|
|
type = *relInfo >> 12;
|
|
// the lower 12 bits define the offset
|
|
offset = *relInfo & 0xfff;
|
|
|
|
switch( type )
|
|
{
|
|
case IMAGE_REL_BASED_ABSOLUTE:
|
|
// skip relocation
|
|
break;
|
|
case IMAGE_REL_BASED_HIGHLOW:
|
|
// change complete 32 bit address
|
|
patchAddrHL = (DWORD *)CALCULATE_ADDRESS( dest, offset );
|
|
*patchAddrHL += delta;
|
|
break;
|
|
default:
|
|
Con_Reportf( S_ERROR "PerformBaseRelocation: unknown relocation: %d\n", type );
|
|
break;
|
|
}
|
|
}
|
|
|
|
// advance to next relocation block
|
|
relocation = (PIMAGE_BASE_RELOCATION)CALCULATE_ADDRESS( relocation, relocation->SizeOfBlock );
|
|
}
|
|
}
|
|
}
|
|
|
|
static FARPROC MemoryGetProcAddress( void *module, const char *name )
|
|
{
|
|
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY((MEMORYMODULE *)module, IMAGE_DIRECTORY_ENTRY_EXPORT );
|
|
byte *codeBase = ((PMEMORYMODULE)module)->codeBase;
|
|
PIMAGE_EXPORT_DIRECTORY exports;
|
|
int idx = -1;
|
|
DWORD i, *nameRef;
|
|
WORD *ordinal;
|
|
|
|
if( directory->Size == 0 )
|
|
{
|
|
// no export table found
|
|
return NULL;
|
|
}
|
|
|
|
exports = (PIMAGE_EXPORT_DIRECTORY)CALCULATE_ADDRESS( codeBase, directory->VirtualAddress );
|
|
|
|
if( exports->NumberOfNames == 0 || exports->NumberOfFunctions == 0 )
|
|
{
|
|
// DLL doesn't export anything
|
|
return NULL;
|
|
}
|
|
|
|
// search function name in list of exported names
|
|
nameRef = (DWORD *)CALCULATE_ADDRESS( codeBase, exports->AddressOfNames );
|
|
ordinal = (WORD *)CALCULATE_ADDRESS( codeBase, exports->AddressOfNameOrdinals );
|
|
|
|
for( i = 0; i < exports->NumberOfNames; i++, nameRef++, ordinal++ )
|
|
{
|
|
// GetProcAddress case insensative ?????
|
|
if( !Q_stricmp( name, (const char *)CALCULATE_ADDRESS( codeBase, *nameRef )))
|
|
{
|
|
idx = *ordinal;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( idx == -1 )
|
|
{
|
|
// exported symbol not found
|
|
return NULL;
|
|
}
|
|
|
|
if((DWORD)idx > exports->NumberOfFunctions )
|
|
{
|
|
// name <-> ordinal number don't match
|
|
return NULL;
|
|
}
|
|
|
|
// addressOfFunctions contains the RVAs to the "real" functions
|
|
return (FARPROC)CALCULATE_ADDRESS( codeBase, *(DWORD *)CALCULATE_ADDRESS( codeBase, exports->AddressOfFunctions + (idx * 4)));
|
|
}
|
|
|
|
static int BuildImportTable( MEMORYMODULE *module )
|
|
{
|
|
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY( module, IMAGE_DIRECTORY_ENTRY_IMPORT );
|
|
byte *codeBase = module->codeBase;
|
|
int result = 1;
|
|
|
|
if( directory->Size > 0 )
|
|
{
|
|
PIMAGE_IMPORT_DESCRIPTOR importDesc = (PIMAGE_IMPORT_DESCRIPTOR)CALCULATE_ADDRESS( codeBase, directory->VirtualAddress );
|
|
|
|
for( ; !IsBadReadPtr( importDesc, sizeof( IMAGE_IMPORT_DESCRIPTOR )) && importDesc->Name; importDesc++ )
|
|
{
|
|
DWORD *thunkRef, *funcRef;
|
|
LPCSTR libname;
|
|
void *handle;
|
|
|
|
libname = (LPCSTR)CALCULATE_ADDRESS( codeBase, importDesc->Name );
|
|
handle = COM_LoadLibrary( libname, false, true );
|
|
|
|
if( handle == NULL )
|
|
{
|
|
Con_Printf( S_ERROR "couldn't load library %s\n", libname );
|
|
result = 0;
|
|
break;
|
|
}
|
|
|
|
module->modules = (void *)Mem_Realloc( host.mempool, module->modules, (module->numModules + 1) * (sizeof( void* )));
|
|
module->modules[module->numModules++] = handle;
|
|
|
|
if( importDesc->OriginalFirstThunk )
|
|
{
|
|
thunkRef = (DWORD *)CALCULATE_ADDRESS( codeBase, importDesc->OriginalFirstThunk );
|
|
funcRef = (DWORD *)CALCULATE_ADDRESS( codeBase, importDesc->FirstThunk );
|
|
}
|
|
else
|
|
{
|
|
// no hint table
|
|
thunkRef = (DWORD *)CALCULATE_ADDRESS( codeBase, importDesc->FirstThunk );
|
|
funcRef = (DWORD *)CALCULATE_ADDRESS( codeBase, importDesc->FirstThunk );
|
|
}
|
|
|
|
for( ; *thunkRef; thunkRef++, funcRef++ )
|
|
{
|
|
LPCSTR funcName;
|
|
|
|
if( IMAGE_SNAP_BY_ORDINAL( *thunkRef ))
|
|
{
|
|
funcName = (LPCSTR)IMAGE_ORDINAL( *thunkRef );
|
|
*funcRef = (DWORD)COM_GetProcAddress( handle, funcName );
|
|
}
|
|
else
|
|
{
|
|
PIMAGE_IMPORT_BY_NAME thunkData = (PIMAGE_IMPORT_BY_NAME)CALCULATE_ADDRESS( codeBase, *thunkRef );
|
|
funcName = (LPCSTR)&thunkData->Name;
|
|
*funcRef = (DWORD)COM_GetProcAddress( handle, funcName );
|
|
}
|
|
|
|
if( *funcRef == 0 )
|
|
{
|
|
Con_Printf( S_ERROR "%s unable to find address: %s\n", libname, funcName );
|
|
result = 0;
|
|
break;
|
|
}
|
|
}
|
|
if( !result ) break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static void MemoryFreeLibrary( void *hInstance )
|
|
{
|
|
MEMORYMODULE *module = (MEMORYMODULE *)hInstance;
|
|
|
|
if( module != NULL )
|
|
{
|
|
int i;
|
|
|
|
if( module->initialized != 0 )
|
|
{
|
|
// notify library about detaching from process
|
|
DllEntryProc DllEntry = (DllEntryProc)CALCULATE_ADDRESS( module->codeBase, module->headers->OptionalHeader.AddressOfEntryPoint );
|
|
(*DllEntry)((HINSTANCE)module->codeBase, DLL_PROCESS_DETACH, 0 );
|
|
module->initialized = 0;
|
|
}
|
|
|
|
if( module->modules != NULL )
|
|
{
|
|
// free previously opened libraries
|
|
for( i = 0; i < module->numModules; i++ )
|
|
{
|
|
if( module->modules[i] != NULL )
|
|
COM_FreeLibrary( module->modules[i] );
|
|
}
|
|
Mem_Free( module->modules ); // Mem_Realloc end
|
|
}
|
|
|
|
FreeSections( module->headers, module );
|
|
|
|
if( module->codeBase != NULL )
|
|
{
|
|
// release memory of library
|
|
VirtualFree( module->codeBase, 0, MEM_RELEASE );
|
|
}
|
|
|
|
HeapFree( GetProcessHeap(), 0, module );
|
|
}
|
|
}
|
|
|
|
void *MemoryLoadLibrary( const char *name )
|
|
{
|
|
MEMORYMODULE *result = NULL;
|
|
PIMAGE_DOS_HEADER dos_header;
|
|
PIMAGE_NT_HEADERS old_header;
|
|
byte *code, *headers;
|
|
DWORD locationDelta;
|
|
DllEntryProc DllEntry;
|
|
string errorstring;
|
|
qboolean successfull;
|
|
void *data = NULL;
|
|
|
|
data = FS_LoadFile( name, NULL, false );
|
|
|
|
if( !data )
|
|
{
|
|
Q_sprintf( errorstring, "couldn't load %s", name );
|
|
goto library_error;
|
|
}
|
|
|
|
dos_header = (PIMAGE_DOS_HEADER)data;
|
|
if( dos_header->e_magic != IMAGE_DOS_SIGNATURE )
|
|
{
|
|
Q_sprintf( errorstring, "%s it's not a valid executable file", name );
|
|
goto library_error;
|
|
}
|
|
|
|
old_header = (PIMAGE_NT_HEADERS)&((const byte *)(data))[dos_header->e_lfanew];
|
|
if( old_header->Signature != IMAGE_NT_SIGNATURE )
|
|
{
|
|
Q_sprintf( errorstring, "%s missing PE header", name );
|
|
goto library_error;
|
|
}
|
|
|
|
// reserve memory for image of library
|
|
code = (byte *)VirtualAlloc((LPVOID)(old_header->OptionalHeader.ImageBase), old_header->OptionalHeader.SizeOfImage, MEM_RESERVE, PAGE_READWRITE );
|
|
|
|
if( code == NULL )
|
|
{
|
|
// try to allocate memory at arbitrary position
|
|
code = (byte *)VirtualAlloc( NULL, old_header->OptionalHeader.SizeOfImage, MEM_RESERVE, PAGE_READWRITE );
|
|
}
|
|
|
|
if( code == NULL )
|
|
{
|
|
Q_sprintf( errorstring, "%s can't reserve memory", name );
|
|
goto library_error;
|
|
}
|
|
|
|
result = (MEMORYMODULE *)HeapAlloc( GetProcessHeap(), 0, sizeof( MEMORYMODULE ));
|
|
result->codeBase = code;
|
|
result->numModules = 0;
|
|
result->modules = NULL;
|
|
result->initialized = 0;
|
|
|
|
// XXX: is it correct to commit the complete memory region at once?
|
|
// calling DllEntry raises an exception if we don't...
|
|
VirtualAlloc( code, old_header->OptionalHeader.SizeOfImage, MEM_COMMIT, PAGE_READWRITE );
|
|
|
|
// commit memory for headers
|
|
headers = (byte *)VirtualAlloc( code, old_header->OptionalHeader.SizeOfHeaders, MEM_COMMIT, PAGE_READWRITE );
|
|
|
|
// copy PE header to code
|
|
memcpy( headers, dos_header, dos_header->e_lfanew + old_header->OptionalHeader.SizeOfHeaders );
|
|
result->headers = (PIMAGE_NT_HEADERS)&((const byte *)(headers))[dos_header->e_lfanew];
|
|
|
|
// update position
|
|
result->headers->OptionalHeader.ImageBase = (DWORD)code;
|
|
|
|
// copy sections from DLL file block to new memory location
|
|
CopySections( data, old_header, result );
|
|
|
|
// adjust base address of imported data
|
|
locationDelta = (DWORD)(code - old_header->OptionalHeader.ImageBase);
|
|
if( locationDelta != 0 ) PerformBaseRelocation( result, locationDelta );
|
|
|
|
// load required dlls and adjust function table of imports
|
|
if( !BuildImportTable( result ))
|
|
{
|
|
Q_sprintf( errorstring, "%s failed to build import table", name );
|
|
goto library_error;
|
|
}
|
|
|
|
// mark memory pages depending on section headers and release
|
|
// sections that are marked as "discardable"
|
|
FinalizeSections( result );
|
|
|
|
// get entry point of loaded library
|
|
if( result->headers->OptionalHeader.AddressOfEntryPoint != 0 )
|
|
{
|
|
DllEntry = (DllEntryProc)CALCULATE_ADDRESS( code, result->headers->OptionalHeader.AddressOfEntryPoint );
|
|
if( DllEntry == 0 )
|
|
{
|
|
Q_sprintf( errorstring, "%s has no entry point", name );
|
|
goto library_error;
|
|
}
|
|
|
|
// notify library about attaching to process
|
|
successfull = (*DllEntry)((HINSTANCE)code, DLL_PROCESS_ATTACH, 0 );
|
|
if( !successfull )
|
|
{
|
|
Q_sprintf( errorstring, "can't attach library %s", name );
|
|
goto library_error;
|
|
}
|
|
result->initialized = 1;
|
|
}
|
|
|
|
Mem_Free( data ); // release memory
|
|
return (void *)result;
|
|
library_error:
|
|
// cleanup
|
|
if( data ) Mem_Free( data );
|
|
MemoryFreeLibrary( result );
|
|
Con_Printf( S_ERROR "LoadLibrary: %s\n", errorstring );
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
---------------------------------------------------------------
|
|
|
|
Name for function stuff
|
|
|
|
---------------------------------------------------------------
|
|
*/
|
|
static void FsGetString( file_t *f, char *str )
|
|
{
|
|
char ch;
|
|
|
|
while(( ch = FS_Getc( f )) != EOF )
|
|
{
|
|
*str++ = ch;
|
|
if( !ch ) break;
|
|
}
|
|
}
|
|
|
|
static void FreeNameFuncGlobals( dll_user_t *hInst )
|
|
{
|
|
int i;
|
|
|
|
if( !hInst ) return;
|
|
|
|
if( hInst->ordinals ) Mem_Free( hInst->ordinals );
|
|
if( hInst->funcs ) Mem_Free( hInst->funcs );
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
{
|
|
if( hInst->names[i] )
|
|
Mem_Free( hInst->names[i] );
|
|
}
|
|
|
|
hInst->num_ordinals = 0;
|
|
hInst->ordinals = NULL;
|
|
hInst->funcs = NULL;
|
|
}
|
|
|
|
char *GetMSVCName( const char *in_name )
|
|
{
|
|
static string out_name;
|
|
char *pos;
|
|
|
|
if( in_name[0] == '?' ) // is this a MSVC C++ mangled name?
|
|
{
|
|
if(( pos = Q_strstr( in_name, "@@" )) != NULL )
|
|
{
|
|
int len = pos - in_name;
|
|
|
|
// strip off the leading '?'
|
|
Q_strncpy( out_name, in_name + 1, sizeof( out_name ));
|
|
out_name[len-1] = 0; // terminate string at the "@@"
|
|
return out_name;
|
|
}
|
|
}
|
|
|
|
Q_strncpy( out_name, in_name, sizeof( out_name ));
|
|
|
|
return out_name;
|
|
}
|
|
|
|
qboolean LibraryLoadSymbols( dll_user_t *hInst )
|
|
{
|
|
file_t *f;
|
|
string errorstring;
|
|
DOS_HEADER dos_header;
|
|
LONG nt_signature;
|
|
PE_HEADER pe_header;
|
|
SECTION_HEADER section_header;
|
|
qboolean rdata_found;
|
|
OPTIONAL_HEADER optional_header;
|
|
long rdata_delta = 0;
|
|
EXPORT_DIRECTORY export_directory;
|
|
long name_offset;
|
|
long exports_offset;
|
|
long ordinal_offset;
|
|
long function_offset;
|
|
string function_name;
|
|
dword *p_Names = NULL;
|
|
int i, index;
|
|
|
|
// can only be done for loaded libraries
|
|
if( !hInst ) return false;
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
hInst->names[i] = NULL;
|
|
|
|
f = FS_Open( hInst->shortPath, "rb", false );
|
|
if( !f )
|
|
{
|
|
Q_sprintf( errorstring, "couldn't load %s", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Read( f, &dos_header, sizeof( dos_header )) != sizeof( dos_header ))
|
|
{
|
|
Q_sprintf( errorstring, "%s has corrupted EXE header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( dos_header.e_magic != DOS_SIGNATURE )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid dll signature", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Seek( f, dos_header.e_lfanew, SEEK_SET ) == -1 )
|
|
{
|
|
Q_sprintf( errorstring, "%s error seeking for new exe header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Read( f, &nt_signature, sizeof( nt_signature )) != sizeof( nt_signature ))
|
|
{
|
|
Q_sprintf( errorstring, "%s has corrupted NT header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( nt_signature != NT_SIGNATURE )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid NT signature", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Read( f, &pe_header, sizeof( pe_header )) != sizeof( pe_header ))
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid PE header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( !pe_header.SizeOfOptionalHeader )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have an optional header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Read( f, &optional_header, sizeof( optional_header )) != sizeof( optional_header ))
|
|
{
|
|
Q_sprintf( errorstring, "%s optional header probably corrupted", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
rdata_found = false;
|
|
|
|
for( i = 0; i < pe_header.NumberOfSections; i++ )
|
|
{
|
|
if( FS_Read( f, §ion_header, sizeof( section_header )) != sizeof( section_header ))
|
|
{
|
|
Q_sprintf( errorstring, "%s error during reading section header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if((( optional_header.DataDirectory[0].VirtualAddress >= section_header.VirtualAddress ) &&
|
|
(optional_header.DataDirectory[0].VirtualAddress < (section_header.VirtualAddress + section_header.Misc.VirtualSize))))
|
|
{
|
|
rdata_found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( rdata_found )
|
|
{
|
|
rdata_delta = section_header.VirtualAddress - section_header.PointerToRawData;
|
|
}
|
|
|
|
exports_offset = optional_header.DataDirectory[0].VirtualAddress - rdata_delta;
|
|
|
|
if( FS_Seek( f, exports_offset, SEEK_SET ) == -1 )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid exports section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
if( FS_Read( f, &export_directory, sizeof( export_directory )) != sizeof( export_directory ))
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid optional header", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
hInst->num_ordinals = export_directory.NumberOfNames; // also number of ordinals
|
|
|
|
if( hInst->num_ordinals > MAX_LIBRARY_EXPORTS )
|
|
{
|
|
Q_sprintf( errorstring, "%s too many exports %i", hInst->shortPath, hInst->num_ordinals );
|
|
hInst->num_ordinals = 0;
|
|
goto table_error;
|
|
}
|
|
|
|
ordinal_offset = export_directory.AddressOfNameOrdinals - rdata_delta;
|
|
|
|
if( FS_Seek( f, ordinal_offset, SEEK_SET ) == -1 )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid ordinals section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
hInst->ordinals = Mem_Malloc( host.mempool, hInst->num_ordinals * sizeof( word ));
|
|
|
|
if( FS_Read( f, hInst->ordinals, hInst->num_ordinals * sizeof( word )) != (hInst->num_ordinals * sizeof( word )))
|
|
{
|
|
Q_sprintf( errorstring, "%s error during reading ordinals table", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
function_offset = export_directory.AddressOfFunctions - rdata_delta;
|
|
|
|
if( FS_Seek( f, function_offset, SEEK_SET ) == -1 )
|
|
{
|
|
Q_sprintf( errorstring, "%s does not have a valid export address section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
hInst->funcs = Mem_Malloc( host.mempool, hInst->num_ordinals * sizeof( dword ));
|
|
|
|
if( FS_Read( f, hInst->funcs, hInst->num_ordinals * sizeof( dword )) != (hInst->num_ordinals * sizeof( dword )))
|
|
{
|
|
Q_sprintf( errorstring, "%s error during reading export address section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
name_offset = export_directory.AddressOfNames - rdata_delta;
|
|
|
|
if( FS_Seek( f, name_offset, SEEK_SET ) == -1 )
|
|
{
|
|
Q_sprintf( errorstring, "%s file does not have a valid names section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
p_Names = Mem_Malloc( host.mempool, hInst->num_ordinals * sizeof( dword ));
|
|
|
|
if( FS_Read( f, p_Names, hInst->num_ordinals * sizeof( dword )) != (hInst->num_ordinals * sizeof( dword )))
|
|
{
|
|
Q_sprintf( errorstring, "%s error during reading names table", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
{
|
|
name_offset = p_Names[i] - rdata_delta;
|
|
|
|
if( name_offset != 0 )
|
|
{
|
|
if( FS_Seek( f, name_offset, SEEK_SET ) != -1 )
|
|
{
|
|
FsGetString( f, function_name );
|
|
hInst->names[i] = copystring( GetMSVCName( function_name ));
|
|
}
|
|
else break;
|
|
}
|
|
}
|
|
|
|
if( i != hInst->num_ordinals )
|
|
{
|
|
Q_sprintf( errorstring, "%s error during loading names section", hInst->shortPath );
|
|
goto table_error;
|
|
}
|
|
FS_Close( f );
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
{
|
|
if( !Q_strcmp( "GiveFnptrsToDll", hInst->names[i] )) // main entry point for user dlls
|
|
{
|
|
void *fn_offset;
|
|
|
|
index = hInst->ordinals[i];
|
|
fn_offset = (void *)COM_GetProcAddress( hInst, "GiveFnptrsToDll" );
|
|
hInst->funcBase = (dword)(fn_offset) - hInst->funcs[index];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( p_Names ) Mem_Free( p_Names );
|
|
return true;
|
|
table_error:
|
|
// cleanup
|
|
if( f ) FS_Close( f );
|
|
if( p_Names ) Mem_Free( p_Names );
|
|
FreeNameFuncGlobals( hInst );
|
|
Con_Printf( S_ERROR "LoadLibrary: %s\n", errorstring );
|
|
|
|
return false;
|
|
}
|
|
|
|
qboolean COM_CheckLibraryDirectDependency( const char *name, const char *depname, qboolean directpath )
|
|
{
|
|
PIMAGE_DOS_HEADER dos_header;
|
|
PIMAGE_NT_HEADERS old_header;
|
|
PIMAGE_DATA_DIRECTORY directory;
|
|
PIMAGE_IMPORT_DESCRIPTOR importDesc;
|
|
string errorstring;
|
|
void *data = NULL;
|
|
dll_user_t *hInst;
|
|
|
|
hInst = FS_FindLibrary( name, directpath );
|
|
if( !hInst )
|
|
{
|
|
return false; // nothing to load
|
|
}
|
|
|
|
data = FS_LoadFile( name, NULL, false );
|
|
if( !data )
|
|
{
|
|
Q_snprintf( errorstring, sizeof( errorstring ), "couldn't load %s", name );
|
|
goto libraryerror;
|
|
}
|
|
|
|
dos_header = ( PIMAGE_DOS_HEADER )data;
|
|
if( dos_header->e_magic != IMAGE_DOS_SIGNATURE )
|
|
{
|
|
Q_snprintf( errorstring, sizeof( errorstring ), "%s it's not a valid executable file", name );
|
|
goto libraryerror;
|
|
}
|
|
|
|
old_header = ( PIMAGE_NT_HEADERS )&( ( const byte * )( data ) )[dos_header->e_lfanew];
|
|
if( old_header->Signature != IMAGE_NT_SIGNATURE )
|
|
{
|
|
Q_snprintf( errorstring, sizeof( errorstring ), "%s missing PE header", name );
|
|
goto libraryerror;
|
|
}
|
|
|
|
directory = &old_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
|
|
|
|
if( directory->Size <= 0 )
|
|
{
|
|
Q_snprintf( errorstring, sizeof( errorstring ), "%s has no dependencies. Is this dll valid?\n" );
|
|
goto libraryerror;
|
|
}
|
|
|
|
importDesc = (PIMAGE_IMPORT_DESCRIPTOR)CALCULATE_ADDRESS( data, directory->VirtualAddress );
|
|
|
|
for( ; !IsBadReadPtr( importDesc, sizeof( IMAGE_IMPORT_DESCRIPTOR)) && importDesc->Name; importDesc++ )
|
|
{
|
|
const char *importName = ( const char* )CALCULATE_ADDRESS( data, importDesc->Name );
|
|
Con_Reportf( "library %s has direct dependency %s\n", name, importName );
|
|
|
|
if( !Q_stricmp( importName, depname ) )
|
|
{
|
|
Mem_Free( data );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
libraryerror:
|
|
Con_Printf( errorstring );
|
|
if( data ) Mem_Free( data ); // release memory
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
================
|
|
COM_LoadLibrary
|
|
|
|
smart dll loader - can loading dlls from pack or wad files
|
|
================
|
|
*/
|
|
void *COM_LoadLibrary( const char *dllname, int build_ordinals_table, qboolean directpath )
|
|
{
|
|
dll_user_t *hInst;
|
|
|
|
hInst = FS_FindLibrary( dllname, directpath );
|
|
if( !hInst ) return NULL; // nothing to load
|
|
|
|
if( hInst->custom_loader )
|
|
{
|
|
if( hInst->encrypted )
|
|
{
|
|
Con_Printf( S_ERROR "LoadLibrary: couldn't load encrypted library %s\n", dllname );
|
|
return NULL;
|
|
}
|
|
|
|
hInst->hInstance = MemoryLoadLibrary( hInst->fullPath );
|
|
}
|
|
else hInst->hInstance = LoadLibrary( hInst->fullPath );
|
|
|
|
if( !hInst->hInstance )
|
|
{
|
|
Con_Reportf( "LoadLibrary: Loading %s - failed\n", dllname );
|
|
COM_FreeLibrary( hInst );
|
|
return NULL;
|
|
}
|
|
|
|
// if not set - FunctionFromName and NameForFunction will not working
|
|
if( build_ordinals_table )
|
|
{
|
|
if( !LibraryLoadSymbols( hInst ))
|
|
{
|
|
Con_Reportf( "LoadLibrary: Loading %s - failed\n", dllname );
|
|
COM_FreeLibrary( hInst );
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
Con_Reportf( "LoadLibrary: Loading %s - ok\n", dllname );
|
|
|
|
return hInst;
|
|
}
|
|
|
|
void *COM_GetProcAddress( void *hInstance, const char *name )
|
|
{
|
|
dll_user_t *hInst = (dll_user_t *)hInstance;
|
|
|
|
if( !hInst || !hInst->hInstance )
|
|
return NULL;
|
|
|
|
if( hInst->custom_loader )
|
|
return (void *)MemoryGetProcAddress( hInst->hInstance, name );
|
|
return (void *)GetProcAddress( hInst->hInstance, name );
|
|
}
|
|
|
|
void COM_FreeLibrary( void *hInstance )
|
|
{
|
|
dll_user_t *hInst = (dll_user_t *)hInstance;
|
|
|
|
if( !hInst || !hInst->hInstance )
|
|
return; // already freed
|
|
|
|
if( host.status == HOST_CRASHED )
|
|
{
|
|
// we need to hold down all modules, while MSVC can find error
|
|
Con_Reportf( "Sys_FreeLibrary: hold %s for debugging\n", hInst->dllName );
|
|
return;
|
|
}
|
|
else Con_Reportf( "Sys_FreeLibrary: Unloading %s\n", hInst->dllName );
|
|
|
|
if( hInst->custom_loader )
|
|
MemoryFreeLibrary( hInst->hInstance );
|
|
else FreeLibrary( hInst->hInstance );
|
|
|
|
hInst->hInstance = NULL;
|
|
|
|
if( hInst->num_ordinals )
|
|
FreeNameFuncGlobals( hInst );
|
|
Mem_Free( hInst ); // done
|
|
}
|
|
|
|
void *COM_FunctionFromName( void *hInstance, const char *pName )
|
|
{
|
|
dll_user_t *hInst = (dll_user_t *)hInstance;
|
|
int i, index;
|
|
|
|
if( !hInst || !hInst->hInstance )
|
|
return 0;
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
{
|
|
if( !Q_strcmp( pName, hInst->names[i] ))
|
|
{
|
|
index = hInst->ordinals[i];
|
|
return hInst->funcs[index] + hInst->funcBase;
|
|
}
|
|
}
|
|
|
|
// couldn't find the function name to return address
|
|
Con_Printf( "Can't find proc: %s\n", pName );
|
|
|
|
return 0;
|
|
}
|
|
|
|
const char *COM_NameForFunction( void *hInstance, void *function )
|
|
{
|
|
dll_user_t *hInst = (dll_user_t *)hInstance;
|
|
int i, index;
|
|
|
|
if( !hInst || !hInst->hInstance )
|
|
return NULL;
|
|
|
|
for( i = 0; i < hInst->num_ordinals; i++ )
|
|
{
|
|
index = hInst->ordinals[i];
|
|
|
|
if(( (char*)function - (char*)hInst->funcBase ) == hInst->funcs[index] )
|
|
return hInst->names[i];
|
|
}
|
|
|
|
// couldn't find the function address to return name
|
|
Con_Printf( "Can't find address: %08lx\n", function );
|
|
|
|
return NULL;
|
|
}
|
|
#endif // XASH_64BIT
|
|
#endif // _WIN32
|