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43cb03be3a
wine/dlls/kernel/module.c
Marcus Meissner 492451464a Removed too strict header check to enable execution of handcoded PE 
exes.
2003-12-31 00:12:31 +00:00

874 lines
26 KiB
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/*
* Modules
*
* Copyright 1995 Alexandre Julliard
*
* 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 "wine/port.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "wine/winbase16.h"
#include "winerror.h"
#include "ntstatus.h"
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winternl.h"
#include "thread.h"
#include "module.h"
#include "wine/debug.h"
#include "wine/unicode.h"
#include "wine/server.h"
WINE_DEFAULT_DEBUG_CHANNEL(module);
WINE_DECLARE_DEBUG_CHANNEL(loaddll);
/****************************************************************************
* DisableThreadLibraryCalls (KERNEL32.@)
*
* Inform the module loader that thread notifications are not required for a dll.
*
* PARAMS
* hModule [I] Module handle to skip calls for
*
* RETURNS
* Success: TRUE. Thread attach and detach notifications will not be sent
* to hModule.
* Failure: FALSE. Use GetLastError() to determine the cause.
*
* NOTES
* This is typically called from the dll entry point of a dll during process
* attachment, for dlls that do not need to process thread notifications.
*/
BOOL WINAPI DisableThreadLibraryCalls( HMODULE hModule )
{
NTSTATUS nts = LdrDisableThreadCalloutsForDll( hModule );
if (nts == STATUS_SUCCESS) return TRUE;
SetLastError( RtlNtStatusToDosError( nts ) );
return FALSE;
}
/* Check whether a file is an OS/2 or a very old Windows executable
* by testing on import of KERNEL.
*
* FIXME: is reading the module imports the only way of discerning
* old Windows binaries from OS/2 ones ? At least it seems so...
*/
static enum binary_type MODULE_Decide_OS2_OldWin(HANDLE hfile, const IMAGE_DOS_HEADER *mz,
const IMAGE_OS2_HEADER *ne)
{
DWORD currpos = SetFilePointer( hfile, 0, NULL, SEEK_CUR);
enum binary_type ret = BINARY_OS216;
LPWORD modtab = NULL;
LPSTR nametab = NULL;
DWORD len;
int i;
/* read modref table */
if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_modtab, NULL, SEEK_SET ) == -1)
|| (!(modtab = HeapAlloc( GetProcessHeap(), 0, ne->ne_cmod*sizeof(WORD))))
|| (!(ReadFile(hfile, modtab, ne->ne_cmod*sizeof(WORD), &len, NULL)))
|| (len != ne->ne_cmod*sizeof(WORD)) )
goto broken;
/* read imported names table */
if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_imptab, NULL, SEEK_SET ) == -1)
|| (!(nametab = HeapAlloc( GetProcessHeap(), 0, ne->ne_enttab - ne->ne_imptab)))
|| (!(ReadFile(hfile, nametab, ne->ne_enttab - ne->ne_imptab, &len, NULL)))
|| (len != ne->ne_enttab - ne->ne_imptab) )
goto broken;
for (i=0; i < ne->ne_cmod; i++)
{
LPSTR module = &nametab[modtab[i]];
TRACE("modref: %.*s\n", module[0], &module[1]);
if (!(strncmp(&module[1], "KERNEL", module[0])))
{ /* very old Windows file */
MESSAGE("This seems to be a very old (pre-3.0) Windows executable. Expect crashes, especially if this is a real-mode binary !\n");
ret = BINARY_WIN16;
goto good;
}
}
broken:
ERR("Hmm, an error occurred. Is this binary file broken ?\n");
good:
HeapFree( GetProcessHeap(), 0, modtab);
HeapFree( GetProcessHeap(), 0, nametab);
SetFilePointer( hfile, currpos, NULL, SEEK_SET); /* restore filepos */
return ret;
}
/***********************************************************************
* MODULE_GetBinaryType
*/
enum binary_type MODULE_GetBinaryType( HANDLE hfile )
{
union
{
struct
{
unsigned char magic[4];
unsigned char ignored[12];
unsigned short type;
} elf;
struct
{
unsigned long magic;
unsigned long cputype;
unsigned long cpusubtype;
unsigned long filetype;
} macho;
IMAGE_DOS_HEADER mz;
} header;
char magic[4];
DWORD len;
/* Seek to the start of the file and read the header information. */
if (SetFilePointer( hfile, 0, NULL, SEEK_SET ) == -1)
return BINARY_UNKNOWN;
if (!ReadFile( hfile, &header, sizeof(header), &len, NULL ) || len != sizeof(header))
return BINARY_UNKNOWN;
if (!memcmp( header.elf.magic, "\177ELF", 4 ))
{
/* FIXME: we don't bother to check byte order, architecture, etc. */
switch(header.elf.type)
{
case 2: return BINARY_UNIX_EXE;
case 3: return BINARY_UNIX_LIB;
}
return BINARY_UNKNOWN;
}
/* Mach-o File with Endian set to Big Endian or Little Endian*/
if (header.macho.magic == 0xfeedface || header.macho.magic == 0xecafdeef)
{
switch(header.macho.filetype)
{
case 0x8: /* MH_BUNDLE */ return BINARY_UNIX_LIB;
}
return BINARY_UNKNOWN;
}
/* Not ELF, try DOS */
if (header.mz.e_magic == IMAGE_DOS_SIGNATURE)
{
/* We do have a DOS image so we will now try to seek into
* the file by the amount indicated by the field
* "Offset to extended header" and read in the
* "magic" field information at that location.
* This will tell us if there is more header information
* to read or not.
*/
if (SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) == -1)
return BINARY_DOS;
if (!ReadFile( hfile, magic, sizeof(magic), &len, NULL ) || len != sizeof(magic))
return BINARY_DOS;
/* Reading the magic field succeeded so
* we will try to determine what type it is.
*/
if (!memcmp( magic, "PE\0\0", 4 ))
{
IMAGE_FILE_HEADER FileHeader;
if (ReadFile( hfile, &FileHeader, sizeof(FileHeader), &len, NULL ) && len == sizeof(FileHeader))
{
if (FileHeader.Characteristics & IMAGE_FILE_DLL) return BINARY_PE_DLL;
return BINARY_PE_EXE;
}
return BINARY_DOS;
}
if (!memcmp( magic, "NE", 2 ))
{
/* This is a Windows executable (NE) header. This can
* mean either a 16-bit OS/2 or a 16-bit Windows or even a
* DOS program (running under a DOS extender). To decide
* which, we'll have to read the NE header.
*/
IMAGE_OS2_HEADER ne;
if ( SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) != -1
&& ReadFile( hfile, &ne, sizeof(ne), &len, NULL )
&& len == sizeof(ne) )
{
switch ( ne.ne_exetyp )
{
case 2: return BINARY_WIN16;
case 5: return BINARY_DOS;
default: return MODULE_Decide_OS2_OldWin(hfile, &header.mz, &ne);
}
}
/* Couldn't read header, so abort. */
return BINARY_DOS;
}
/* Unknown extended header, but this file is nonetheless DOS-executable. */
return BINARY_DOS;
}
return BINARY_UNKNOWN;
}
/***********************************************************************
* GetBinaryTypeW [KERNEL32.@]
*
* Determine whether a file is executable, and if so, what kind.
*
* PARAMS
* lpApplicationName [I] Path of the file to check
* lpBinaryType [O] Destination for the binary type
*
* RETURNS
* TRUE, if the file is an executable, in which case lpBinaryType is set.
* FALSE, if the file is not an executable or if the function fails.
*
* NOTES
* The type of executable is a property that determines which subsytem an
* executable file runs under. lpBinaryType can be set to one of the following
* values:
* SCS_32BIT_BINARY: A Win32 based application
* SCS_DOS_BINARY: An MS-Dos based application
* SCS_WOW_BINARY: A Win16 based application
* SCS_PIF_BINARY: A PIF file that executes an MS-Dos based app
* SCS_POSIX_BINARY: A POSIX based application ( Not implemented )
* SCS_OS216_BINARY: A 16bit OS/2 based application
*
* To find the binary type, this function reads in the files header information.
* If extended header information is not present it will assume that the file
* is a DOS executable. If extended header information is present it will
* determine if the file is a 16 or 32 bit Windows executable by checking the
* flags in the header.
*
* ".com" and ".pif" files are only recognized by their file name extension,
* as per native Windows.
*/
BOOL WINAPI GetBinaryTypeW( LPCWSTR lpApplicationName, LPDWORD lpBinaryType )
{
BOOL ret = FALSE;
HANDLE hfile;
TRACE("%s\n", debugstr_w(lpApplicationName) );
/* Sanity check.
*/
if ( lpApplicationName == NULL || lpBinaryType == NULL )
return FALSE;
/* Open the file indicated by lpApplicationName for reading.
*/
hfile = CreateFileW( lpApplicationName, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, 0 );
if ( hfile == INVALID_HANDLE_VALUE )
return FALSE;
/* Check binary type
*/
switch(MODULE_GetBinaryType( hfile ))
{
case BINARY_UNKNOWN:
{
static const WCHAR comW[] = { '.','C','O','M',0 };
static const WCHAR pifW[] = { '.','P','I','F',0 };
const WCHAR *ptr;
/* try to determine from file name */
ptr = strrchrW( lpApplicationName, '.' );
if (!ptr) break;
if (!strcmpiW( ptr, comW ))
{
*lpBinaryType = SCS_DOS_BINARY;
ret = TRUE;
}
else if (!strcmpiW( ptr, pifW ))
{
*lpBinaryType = SCS_PIF_BINARY;
ret = TRUE;
}
break;
}
case BINARY_PE_EXE:
case BINARY_PE_DLL:
*lpBinaryType = SCS_32BIT_BINARY;
ret = TRUE;
break;
case BINARY_WIN16:
*lpBinaryType = SCS_WOW_BINARY;
ret = TRUE;
break;
case BINARY_OS216:
*lpBinaryType = SCS_OS216_BINARY;
ret = TRUE;
break;
case BINARY_DOS:
*lpBinaryType = SCS_DOS_BINARY;
ret = TRUE;
break;
case BINARY_UNIX_EXE:
case BINARY_UNIX_LIB:
ret = FALSE;
break;
}
CloseHandle( hfile );
return ret;
}
/***********************************************************************
* GetBinaryTypeA [KERNEL32.@]
* GetBinaryType [KERNEL32.@]
*/
BOOL WINAPI GetBinaryTypeA( LPCSTR lpApplicationName, LPDWORD lpBinaryType )
{
ANSI_STRING app_nameA;
NTSTATUS status;
TRACE("%s\n", debugstr_a(lpApplicationName));
/* Sanity check.
*/
if ( lpApplicationName == NULL || lpBinaryType == NULL )
return FALSE;
RtlInitAnsiString(&app_nameA, lpApplicationName);
status = RtlAnsiStringToUnicodeString(&NtCurrentTeb()->StaticUnicodeString,
&app_nameA, FALSE);
if (!status)
return GetBinaryTypeW(NtCurrentTeb()->StaticUnicodeString.Buffer, lpBinaryType);
SetLastError(RtlNtStatusToDosError(status));
return FALSE;
}
/***********************************************************************
* GetModuleHandleA (KERNEL32.@)
* GetModuleHandle32 (KERNEL.488)
*
* Get the handle of a dll loaded into the process address space.
*
* PARAMS
* module [I] Name of the dll
*
* RETURNS
* Success: A handle to the loaded dll.
* Failure: A NULL handle. Use GetLastError() to determine the cause.
*/
HMODULE WINAPI GetModuleHandleA(LPCSTR module)
{
NTSTATUS nts;
HMODULE ret;
UNICODE_STRING wstr;
if (!module) return NtCurrentTeb()->Peb->ImageBaseAddress;
RtlCreateUnicodeStringFromAsciiz(&wstr, module);
nts = LdrGetDllHandle(0, 0, &wstr, &ret);
RtlFreeUnicodeString( &wstr );
if (nts != STATUS_SUCCESS)
{
ret = 0;
SetLastError( RtlNtStatusToDosError( nts ) );
}
return ret;
}
/***********************************************************************
* GetModuleHandleW (KERNEL32.@)
*
* Unicode version of GetModuleHandleA.
*/
HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
{
NTSTATUS nts;
HMODULE ret;
UNICODE_STRING wstr;
if (!module) return NtCurrentTeb()->Peb->ImageBaseAddress;
RtlInitUnicodeString( &wstr, module );
nts = LdrGetDllHandle( 0, 0, &wstr, &ret);
if (nts != STATUS_SUCCESS)
{
SetLastError( RtlNtStatusToDosError( nts ) );
ret = 0;
}
return ret;
}
/***********************************************************************
* GetModuleFileNameA (KERNEL32.@)
* GetModuleFileName32 (KERNEL.487)
*
* Get the file name of a loaded module from its handle.
*
* RETURNS
* Success: The length of the file name, excluding the terminating NUL.
* Failure: 0. Use GetLastError() to determine the cause.
*
* NOTES
* This function always returns the long path of hModule (as opposed to
* GetModuleFileName16() which returns short paths when the modules version
* field is < 4.0).
*/
DWORD WINAPI GetModuleFileNameA(
HMODULE hModule, /* [in] Module handle (32 bit) */
LPSTR lpFileName, /* [out] Destination for file name */
DWORD size ) /* [in] Size of lpFileName in characters */
{
LPWSTR filenameW = HeapAlloc( GetProcessHeap(), 0, size * sizeof(WCHAR) );
if (!filenameW)
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return 0;
}
GetModuleFileNameW( hModule, filenameW, size );
WideCharToMultiByte( CP_ACP, 0, filenameW, -1, lpFileName, size, NULL, NULL );
HeapFree( GetProcessHeap(), 0, filenameW );
return strlen( lpFileName );
}
/***********************************************************************
* GetModuleFileNameW (KERNEL32.@)
*
* Unicode version of GetModuleFileNameA.
*/
DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName, DWORD size )
{
ULONG magic;
lpFileName[0] = 0;
LdrLockLoaderLock( 0, NULL, &magic );
if (!hModule && !(NtCurrentTeb()->tibflags & TEBF_WIN32))
{
/* 16-bit task - get current NE module name */
NE_MODULE *pModule = NE_GetPtr( GetCurrentTask() );
if (pModule)
{
WCHAR path[MAX_PATH];
MultiByteToWideChar( CP_ACP, 0, NE_MODULE_NAME(pModule), -1, path, MAX_PATH );
GetLongPathNameW(path, lpFileName, size);
}
}
else
{
LDR_MODULE* pldr;
NTSTATUS nts;
if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
nts = LdrFindEntryForAddress( hModule, &pldr );
if (nts == STATUS_SUCCESS) lstrcpynW(lpFileName, pldr->FullDllName.Buffer, size);
else SetLastError( RtlNtStatusToDosError( nts ) );
}
LdrUnlockLoaderLock( 0, magic );
TRACE( "%s\n", debugstr_w(lpFileName) );
return strlenW(lpFileName);
}
/***********************************************************************
* get_dll_system_path
*/
static const WCHAR *get_dll_system_path(void)
{
static WCHAR *path;
if (!path)
{
WCHAR *p, *exe_name;
int len = 3;
exe_name = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
if (!(p = strrchrW( exe_name, '\\' ))) p = exe_name;
/* include trailing backslash only on drive root */
if (p == exe_name + 2 && exe_name[1] == ':') p++;
len += p - exe_name;
len += GetSystemDirectoryW( NULL, 0 );
len += GetWindowsDirectoryW( NULL, 0 );
path = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
memcpy( path, exe_name, (p - exe_name) * sizeof(WCHAR) );
p = path + (p - exe_name);
*p++ = ';';
*p++ = '.';
*p++ = ';';
GetSystemDirectoryW( p, path + len - p);
p += strlenW(p);
*p++ = ';';
GetWindowsDirectoryW( p, path + len - p);
}
return path;
}
/******************************************************************
* get_dll_load_path
*
* Compute the load path to use for a given dll.
* Returned pointer must be freed by caller.
*/
static WCHAR *get_dll_load_path( LPCWSTR module )
{
static const WCHAR pathW[] = {'P','A','T','H',0};
const WCHAR *system_path = get_dll_system_path();
const WCHAR *mod_end = NULL;
UNICODE_STRING name, value;
WCHAR *p, *ret;
int len = 0, path_len = 0;
/* adjust length for module name */
if (module)
{
mod_end = module;
if ((p = strrchrW( mod_end, '\\' ))) mod_end = p;
if ((p = strrchrW( mod_end, '/' ))) mod_end = p;
if (mod_end == module + 2 && module[1] == ':') mod_end++;
if (mod_end == module && module[0] && module[1] == ':') mod_end += 2;
len += (mod_end - module);
system_path = strchrW( system_path, ';' );
}
len += strlenW( system_path ) + 2;
/* get the PATH variable */
RtlInitUnicodeString( &name, pathW );
value.Length = 0;
value.MaximumLength = 0;
value.Buffer = NULL;
if (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
path_len = value.Length;
if (!(ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) ))) return NULL;
p = ret;
if (module)
{
memcpy( ret, module, (mod_end - module) * sizeof(WCHAR) );
p += (mod_end - module);
}
strcpyW( p, system_path );
p += strlenW(p);
*p++ = ';';
value.Buffer = p;
value.MaximumLength = path_len;
while (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
{
WCHAR *new_ptr;
/* grow the buffer and retry */
path_len = value.Length;
if (!(new_ptr = HeapReAlloc( GetProcessHeap(), 0, ret, path_len + len * sizeof(WCHAR) )))
{
HeapFree( GetProcessHeap(), 0, ret );
return NULL;
}
value.Buffer = new_ptr + (value.Buffer - ret);
value.MaximumLength = path_len;
ret = new_ptr;
}
value.Buffer[value.Length / sizeof(WCHAR)] = 0;
return ret;
}
/******************************************************************
* MODULE_InitLoadPath
*
* Create the initial dll load path.
*/
void MODULE_InitLoadPath(void)
{
WCHAR *path = get_dll_load_path( NULL );
RtlInitUnicodeString( &NtCurrentTeb()->Peb->ProcessParameters->DllPath, path );
}
/******************************************************************
* load_library_as_datafile
*/
static BOOL load_library_as_datafile( LPCWSTR name, HMODULE* hmod)
{
static const WCHAR dotDLL[] = {'.','d','l','l',0};
WCHAR filenameW[MAX_PATH];
HANDLE hFile = INVALID_HANDLE_VALUE;
HANDLE mapping;
HMODULE module;
*hmod = 0;
if (SearchPathW( NULL, (LPCWSTR)name, dotDLL, sizeof(filenameW) / sizeof(filenameW[0]),
filenameW, NULL ))
{
hFile = CreateFileW( filenameW, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, 0 );
}
if (hFile == INVALID_HANDLE_VALUE) return FALSE;
mapping = CreateFileMappingW( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
CloseHandle( hFile );
if (!mapping) return FALSE;
module = MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
CloseHandle( mapping );
if (!module) return FALSE;
/* make sure it's a valid PE file */
if (!RtlImageNtHeader(module))
{
UnmapViewOfFile( module );
return FALSE;
}
*hmod = (HMODULE)((char *)module + 1); /* set low bit of handle to indicate datafile module */
return TRUE;
}
/******************************************************************
* load_library
*
* Helper for LoadLibraryExA/W.
*/
static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
{
NTSTATUS nts;
HMODULE hModule;
WCHAR *load_path;
if (flags & LOAD_LIBRARY_AS_DATAFILE)
{
/* The method in load_library_as_datafile allows searching for the
* 'native' libraries only
*/
if (load_library_as_datafile( libname->Buffer, &hModule )) return hModule;
flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
/* Fallback to normal behaviour */
}
load_path = get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
nts = LdrLoadDll( load_path, flags, libname, &hModule );
HeapFree( GetProcessHeap(), 0, load_path );
if (nts != STATUS_SUCCESS)
{
hModule = 0;
SetLastError( RtlNtStatusToDosError( nts ) );
}
return hModule;
}
/******************************************************************
* LoadLibraryExA (KERNEL32.@)
*
* Load a dll file into the process address space.
*
* PARAMS
* libname [I] Name of the file to load
* hfile [I] Reserved, must be 0.
* flags [I] Flags for loading the dll
*
* RETURNS
* Success: A handle to the loaded dll.
* Failure: A NULL handle. Use GetLastError() to determine the cause.
*
* NOTES
* The HFILE parameter is not used and marked reserved in the SDK. I can
* only guess that it should force a file to be mapped, but I rather
* ignore the parameter because it would be extremely difficult to
* integrate this with different types of module representations.
*/
HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
{
UNICODE_STRING wstr;
HMODULE hModule;
if (!libname)
{
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
RtlCreateUnicodeStringFromAsciiz( &wstr, libname );
hModule = load_library( &wstr, flags );
RtlFreeUnicodeString( &wstr );
return hModule;
}
/***********************************************************************
* LoadLibraryExW (KERNEL32.@)
*
* Unicode version of LoadLibraryExA.
*/
HMODULE WINAPI LoadLibraryExW(LPCWSTR libnameW, HANDLE hfile, DWORD flags)
{
UNICODE_STRING wstr;
if (!libnameW)
{
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
RtlInitUnicodeString( &wstr, libnameW );
return load_library( &wstr, flags );
}
/***********************************************************************
* LoadLibraryA (KERNEL32.@)
*
* Load a dll file into the process address space.
*
* PARAMS
* libname [I] Name of the file to load
*
* RETURNS
* Success: A handle to the loaded dll.
* Failure: A NULL handle. Use GetLastError() to determine the cause.
*
* NOTES
* See LoadLibraryExA().
*/
HMODULE WINAPI LoadLibraryA(LPCSTR libname)
{
return LoadLibraryExA(libname, 0, 0);
}
/***********************************************************************
* LoadLibraryW (KERNEL32.@)
*
* Unicode version of LoadLibraryA.
*/
HMODULE WINAPI LoadLibraryW(LPCWSTR libnameW)
{
return LoadLibraryExW(libnameW, 0, 0);
}
/***********************************************************************
* FreeLibrary (KERNEL32.@)
* FreeLibrary32 (KERNEL.486)
*
* Free a dll loaded into the process address space.
*
* PARAMS
* hLibModule [I] Handle to the dll returned by LoadLibraryA().
*
* RETURNS
* Success: TRUE. The dll is removed if it is not still in use.
* Failure: FALSE. Use GetLastError() to determine the cause.
*/
BOOL WINAPI FreeLibrary(HINSTANCE hLibModule)
{
BOOL retv = FALSE;
NTSTATUS nts;
if (!hLibModule)
{
SetLastError( ERROR_INVALID_HANDLE );
return FALSE;
}
if ((ULONG_PTR)hLibModule & 1)
{
/* this is a LOAD_LIBRARY_AS_DATAFILE module */
char *ptr = (char *)hLibModule - 1;
UnmapViewOfFile( ptr );
return TRUE;
}
if ((nts = LdrUnloadDll( hLibModule )) == STATUS_SUCCESS) retv = TRUE;
else SetLastError( RtlNtStatusToDosError( nts ) );
return retv;
}
/***********************************************************************
* GetProcAddress (KERNEL32.@)
*
* Find the address of an exported symbol in a loaded dll.
*
* PARAMS
* hModule [I] Handle to the dll returned by LoadLibraryA().
* function [I] Name of the symbol, or an integer ordinal number < 16384
*
* RETURNS
* Success: A pointer to the symbol in the process address space.
* Failure: NULL. Use GetLastError() to determine the cause.
*/
FARPROC WINAPI GetProcAddress( HMODULE hModule, LPCSTR function )
{
NTSTATUS nts;
FARPROC fp;
if (HIWORD(function))
{
ANSI_STRING str;
RtlInitAnsiString( &str, function );
nts = LdrGetProcedureAddress( hModule, &str, 0, (void**)&fp );
}
else
nts = LdrGetProcedureAddress( hModule, NULL, (DWORD)function, (void**)&fp );
if (nts != STATUS_SUCCESS)
{
SetLastError( RtlNtStatusToDosError( nts ) );
fp = NULL;
}
return fp;
}
/***********************************************************************
* GetProcAddress32 (KERNEL.453)
*
* Find the address of an exported symbol in a loaded dll.
*
* PARAMS
* hModule [I] Handle to the dll returned by LoadLibraryA().
* function [I] Name of the symbol, or an integer ordinal number < 16384
*
* RETURNS
* Success: A pointer to the symbol in the process address space.
* Failure: NULL. Use GetLastError() to determine the cause.
*/
FARPROC WINAPI GetProcAddress32_16( HMODULE hModule, LPCSTR function )
{
/* FIXME: we used to disable snoop when returning proc for Win16 subsystem */
return GetProcAddress( hModule, function );
}
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