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wine/dlls/kernel32/module.c

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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winerror.h"
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "kernel_private.h"
#include "wine/exception.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(module);
#define NE_FFLAGS_LIBMODULE 0x8000
static WCHAR *dll_directory; /* extra path for SetDllDirectoryW */
static CRITICAL_SECTION dlldir_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &dlldir_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": dlldir_section") }
};
static CRITICAL_SECTION dlldir_section = { &critsect_debug, -1, 0, 0, 0, 0 };
/****************************************************************************
* GetDllDirectoryA (KERNEL32.@)
*/
DWORD WINAPI GetDllDirectoryA( DWORD buf_len, LPSTR buffer )
{
DWORD len;
RtlEnterCriticalSection( &dlldir_section );
len = dll_directory ? FILE_name_WtoA( dll_directory, strlenW(dll_directory), NULL, 0 ) : 0;
if (buffer && buf_len > len)
{
if (dll_directory) FILE_name_WtoA( dll_directory, -1, buffer, buf_len );
else *buffer = 0;
}
else
{
len++; /* for terminating null */
if (buffer) *buffer = 0;
}
RtlLeaveCriticalSection( &dlldir_section );
return len;
}
/****************************************************************************
* GetDllDirectoryW (KERNEL32.@)
*/
DWORD WINAPI GetDllDirectoryW( DWORD buf_len, LPWSTR buffer )
{
DWORD len;
RtlEnterCriticalSection( &dlldir_section );
len = dll_directory ? strlenW( dll_directory ) : 0;
if (buffer && buf_len > len)
{
if (dll_directory) memcpy( buffer, dll_directory, (len + 1) * sizeof(WCHAR) );
else *buffer = 0;
}
else
{
len++; /* for terminating null */
if (buffer) *buffer = 0;
}
RtlLeaveCriticalSection( &dlldir_section );
return len;
}
/****************************************************************************
* SetDllDirectoryA (KERNEL32.@)
*/
BOOL WINAPI SetDllDirectoryA( LPCSTR dir )
{
WCHAR *dirW;
BOOL ret;
if (!(dirW = FILE_name_AtoW( dir, TRUE ))) return FALSE;
ret = SetDllDirectoryW( dirW );
HeapFree( GetProcessHeap(), 0, dirW );
return ret;
}
/****************************************************************************
* SetDllDirectoryW (KERNEL32.@)
*/
BOOL WINAPI SetDllDirectoryW( LPCWSTR dir )
{
WCHAR *newdir = NULL;
if (dir)
{
DWORD len = (strlenW(dir) + 1) * sizeof(WCHAR);
if (!(newdir = HeapAlloc( GetProcessHeap(), 0, len )))
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return FALSE;
}
memcpy( newdir, dir, len );
}
RtlEnterCriticalSection( &dlldir_section );
HeapFree( GetProcessHeap(), 0, dll_directory );
dll_directory = newdir;
RtlLeaveCriticalSection( &dlldir_section );
return TRUE;
}
/****************************************************************************
* 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 DWORD MODULE_Decide_OS2_OldWin(HANDLE hfile, const IMAGE_DOS_HEADER *mz, const IMAGE_OS2_HEADER *ne)
{
DWORD currpos = SetFilePointer( hfile, 0, NULL, SEEK_CUR);
DWORD 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
*/
void MODULE_get_binary_info( HANDLE hfile, struct binary_info *info )
{
union
{
struct
{
unsigned char magic[4];
unsigned char class;
unsigned char data;
unsigned char version;
unsigned char ignored[9];
unsigned short type;
unsigned short machine;
} elf;
struct
{
unsigned int magic;
unsigned int cputype;
unsigned int cpusubtype;
unsigned int filetype;
} macho;
IMAGE_DOS_HEADER mz;
} header;
DWORD len;
memset( info, 0, sizeof(*info) );
/* Seek to the start of the file and read the header information. */
if (SetFilePointer( hfile, 0, NULL, SEEK_SET ) == -1) return;
if (!ReadFile( hfile, &header, sizeof(header), &len, NULL ) || len != sizeof(header)) return;
if (!memcmp( header.elf.magic, "\177ELF", 4 ))
{
if (header.elf.class == 2) info->flags |= BINARY_FLAG_64BIT;
/* FIXME: we don't bother to check byte order, architecture, etc. */
switch(header.elf.type)
{
case 2: info->type = BINARY_UNIX_EXE; break;
case 3: info->type = BINARY_UNIX_LIB; break;
}
}
/* Mach-o File with Endian set to Big Endian or Little Endian */
else if (header.macho.magic == 0xfeedface || header.macho.magic == 0xcefaedfe)
{
if ((header.macho.cputype >> 24) == 1) info->flags |= BINARY_FLAG_64BIT;
switch(header.macho.filetype)
{
case 2: info->type = BINARY_UNIX_EXE; break;
case 8: info->type = BINARY_UNIX_LIB; break;
}
}
/* Not ELF, try DOS */
else if (header.mz.e_magic == IMAGE_DOS_SIGNATURE)
{
union
{
IMAGE_OS2_HEADER os2;
IMAGE_NT_HEADERS32 nt;
} ext_header;
/* 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.
*/
info->type = BINARY_DOS;
if (SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) == -1) return;
if (!ReadFile( hfile, &ext_header, sizeof(ext_header), &len, NULL ) || len < 4) return;
/* Reading the magic field succeeded so
* we will try to determine what type it is.
*/
if (!memcmp( &ext_header.nt.Signature, "PE\0\0", 4 ))
{
if (len >= sizeof(ext_header.nt.FileHeader))
{
info->type = BINARY_PE;
if (ext_header.nt.FileHeader.Characteristics & IMAGE_FILE_DLL)
info->flags |= BINARY_FLAG_DLL;
if (len < sizeof(ext_header.nt)) /* clear remaining part of header if missing */
memset( (char *)&ext_header.nt + len, 0, sizeof(ext_header.nt) - len );
switch (ext_header.nt.OptionalHeader.Magic)
{
case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
info->res_start = (void *)(ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase;
info->res_end = (void *)((ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase +
ext_header.nt.OptionalHeader.SizeOfImage);
break;
case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
info->flags |= BINARY_FLAG_64BIT;
break;
}
}
}
else if (!memcmp( &ext_header.os2.ne_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.
*/
if (len >= sizeof(ext_header.os2))
{
if (ext_header.os2.ne_flags & NE_FFLAGS_LIBMODULE) info->flags |= BINARY_FLAG_DLL;
switch ( ext_header.os2.ne_exetyp )
{
case 1: info->type = BINARY_OS216; break; /* OS/2 */
case 2: info->type = BINARY_WIN16; break; /* Windows */
case 3: info->type = BINARY_DOS; break; /* European MS-DOS 4.x */
case 4: info->type = BINARY_WIN16; break; /* Windows 386; FIXME: is this 32bit??? */
case 5: info->type = BINARY_DOS; break; /* BOSS, Borland Operating System Services */
/* other types, e.g. 0 is: "unknown" */
default: info->type = MODULE_Decide_OS2_OldWin(hfile, &header.mz, &ext_header.os2); break;
}
}
}
}
}
/***********************************************************************
* 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 subsystem 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;
struct binary_info binary_info;
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
*/
MODULE_get_binary_info( hfile, &binary_info );
switch (binary_info.type)
{
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:
*lpBinaryType = (binary_info.flags & BINARY_FLAG_64BIT) ? SCS_64BIT_BINARY : 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.@]
*
* See GetBinaryTypeW.
*/
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;
}
/***********************************************************************
* GetModuleHandleExA (KERNEL32.@)
*/
BOOL WINAPI GetModuleHandleExA( DWORD flags, LPCSTR name, HMODULE *module )
{
WCHAR *nameW;
if (!name || (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS))
return GetModuleHandleExW( flags, (LPCWSTR)name, module );
if (!(nameW = FILE_name_AtoW( name, FALSE ))) return FALSE;
return GetModuleHandleExW( flags, nameW, module );
}
/***********************************************************************
* GetModuleHandleExW (KERNEL32.@)
*/
BOOL WINAPI GetModuleHandleExW( DWORD flags, LPCWSTR name, HMODULE *module )
{
NTSTATUS status = STATUS_SUCCESS;
HMODULE ret;
ULONG magic;
/* if we are messing with the refcount, grab the loader lock */
if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
LdrLockLoaderLock( 0, NULL, &magic );
if (!name)
{
ret = NtCurrentTeb()->Peb->ImageBaseAddress;
}
else if (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
{
void *dummy;
if (!(ret = RtlPcToFileHeader( (void *)name, &dummy ))) status = STATUS_DLL_NOT_FOUND;
}
else
{
UNICODE_STRING wstr;
RtlInitUnicodeString( &wstr, name );
status = LdrGetDllHandle( NULL, 0, &wstr, &ret );
}
if (status == STATUS_SUCCESS)
{
if (flags & GET_MODULE_HANDLE_EX_FLAG_PIN)
FIXME( "should pin refcount for %p\n", ret );
else if (!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
LdrAddRefDll( 0, ret );
}
else SetLastError( RtlNtStatusToDosError( status ) );
if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
LdrUnlockLoaderLock( 0, magic );
if (module) *module = ret;
return (status == STATUS_SUCCESS);
}
/***********************************************************************
* GetModuleHandleA (KERNEL32.@)
*
* 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)
{
HMODULE ret;
if (!GetModuleHandleExA( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
return ret;
}
/***********************************************************************
* GetModuleHandleW (KERNEL32.@)
*
* Unicode version of GetModuleHandleA.
*/
HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
{
HMODULE ret;
if (!GetModuleHandleExW( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
return ret;
}
/***********************************************************************
* GetModuleFileNameA (KERNEL32.@)
*
* 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).
* The function doesn't write a terminating '\0' if the buffer is too
* small.
*/
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) );
DWORD len;
if (!filenameW)
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return 0;
}
if ((len = GetModuleFileNameW( hModule, filenameW, size )))
{
len = FILE_name_WtoA( filenameW, len, lpFileName, size );
if (len < size)
lpFileName[len] = '\0';
else
SetLastError( ERROR_INSUFFICIENT_BUFFER );
}
HeapFree( GetProcessHeap(), 0, filenameW );
return len;
}
/***********************************************************************
* GetModuleFileNameW (KERNEL32.@)
*
* Unicode version of GetModuleFileNameA.
*/
DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName, DWORD size )
{
ULONG magic, len = 0;
LDR_MODULE *pldr;
NTSTATUS nts;
WIN16_SUBSYSTEM_TIB *win16_tib;
if (!hModule && ((win16_tib = NtCurrentTeb()->Tib.SubSystemTib)) && win16_tib->exe_name)
{
len = min(size, win16_tib->exe_name->Length / sizeof(WCHAR));
memcpy( lpFileName, win16_tib->exe_name->Buffer, len * sizeof(WCHAR) );
if (len < size) lpFileName[len] = '\0';
goto done;
}
LdrLockLoaderLock( 0, NULL, &magic );
if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
nts = LdrFindEntryForAddress( hModule, &pldr );
if (nts == STATUS_SUCCESS)
{
len = min(size, pldr->FullDllName.Length / sizeof(WCHAR));
memcpy(lpFileName, pldr->FullDllName.Buffer, len * sizeof(WCHAR));
if (len < size)
lpFileName[len] = '\0';
else
SetLastError( ERROR_INSUFFICIENT_BUFFER );
}
else SetLastError( RtlNtStatusToDosError( nts ) );
LdrUnlockLoaderLock( 0, magic );
done:
TRACE( "%s\n", debugstr_wn(lpFileName, len) );
return len;
}
/***********************************************************************
* get_dll_system_path
*/
static const WCHAR *get_dll_system_path(void)
{
static WCHAR *cached_path;
if (!cached_path)
{
WCHAR *p, *path;
int len = 3;
len += 2 * GetSystemDirectoryW( NULL, 0 );
len += GetWindowsDirectoryW( NULL, 0 );
p = path = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
*p++ = '.';
*p++ = ';';
GetSystemDirectoryW( p, path + len - p);
p += strlenW(p);
/* if system directory ends in "32" add 16-bit version too */
if (p[-2] == '3' && p[-1] == '2')
{
*p++ = ';';
GetSystemDirectoryW( p, path + len - p);
p += strlenW(p) - 2;
}
*p++ = ';';
GetWindowsDirectoryW( p, path + len - p);
cached_path = path;
}
return cached_path;
}
/******************************************************************
* get_module_path_end
*
* Returns the end of the directory component of the module path.
*/
static inline const WCHAR *get_module_path_end(const WCHAR *module)
{
const WCHAR *p;
const WCHAR *mod_end = module;
if (!module) return mod_end;
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;
return mod_end;
}
/******************************************************************
* MODULE_get_dll_load_path
*
* Compute the load path to use for a given dll.
* Returned pointer must be freed by caller.
*/
WCHAR *MODULE_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 = get_module_path_end( module );
/* if module is NULL or doesn't contain a path, fall back to directory
* process was loaded from */
if (module == mod_end)
{
module = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
mod_end = get_module_path_end( module );
}
len += (mod_end - module) + 1;
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;
RtlEnterCriticalSection( &dlldir_section );
if (dll_directory) len += strlenW(dll_directory) + 1;
if ((p = ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) )))
{
if (module)
{
memcpy( ret, module, (mod_end - module) * sizeof(WCHAR) );
p += (mod_end - module);
*p++ = ';';
}
if (dll_directory)
{
strcpyW( p, dll_directory );
p += strlenW(p);
*p++ = ';';
}
}
RtlLeaveCriticalSection( &dlldir_section );
if (!ret) return NULL;
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;
}
/******************************************************************
* 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, 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;
load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
if (flags & LOAD_LIBRARY_AS_DATAFILE)
{
ULONG magic;
LdrLockLoaderLock( 0, NULL, &magic );
if (!(nts = LdrGetDllHandle( load_path, flags, libname, &hModule )))
{
LdrAddRefDll( 0, hModule );
LdrUnlockLoaderLock( 0, magic );
goto done;
}
LdrUnlockLoaderLock( 0, magic );
/* The method in load_library_as_datafile allows searching for the
* 'native' libraries only
*/
if (load_library_as_datafile( libname->Buffer, &hModule )) goto done;
flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
/* Fallback to normal behaviour */
}
nts = LdrLoadDll( load_path, flags, libname, &hModule );
if (nts != STATUS_SUCCESS)
{
hModule = 0;
SetLastError( RtlNtStatusToDosError( nts ) );
}
done:
HeapFree( GetProcessHeap(), 0, load_path );
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 DECLSPEC_HOTPATCH LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
{
WCHAR *libnameW;
if (!(libnameW = FILE_name_AtoW( libname, FALSE ))) return 0;
return LoadLibraryExW( libnameW, hfile, flags );
}
/***********************************************************************
* LoadLibraryExW (KERNEL32.@)
*
* Unicode version of LoadLibraryExA.
*/
HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExW(LPCWSTR libnameW, HANDLE hfile, DWORD flags)
{
UNICODE_STRING wstr;
HMODULE res;
if (!libnameW)
{
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
RtlInitUnicodeString( &wstr, libnameW );
if (wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] != ' ')
return load_library( &wstr, flags );
/* Library name has trailing spaces */
RtlCreateUnicodeString( &wstr, libnameW );
while (wstr.Length > sizeof(WCHAR) &&
wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] == ' ')
{
wstr.Length -= sizeof(WCHAR);
}
wstr.Buffer[wstr.Length/sizeof(WCHAR)] = '\0';
res = load_library( &wstr, flags );
RtlFreeUnicodeString( &wstr );
return res;
}
/***********************************************************************
* 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 DECLSPEC_HOTPATCH LoadLibraryA(LPCSTR libname)
{
return LoadLibraryExA(libname, 0, 0);
}
/***********************************************************************
* LoadLibraryW (KERNEL32.@)
*
* Unicode version of LoadLibraryA.
*/
HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryW(LPCWSTR libnameW)
{
return LoadLibraryExW(libnameW, 0, 0);
}
/***********************************************************************
* FreeLibrary (KERNEL32.@)
*
* 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 DECLSPEC_HOTPATCH 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;
return UnmapViewOfFile( ptr );
}
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 (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
if ((ULONG_PTR)function >> 16)
{
ANSI_STRING str;
RtlInitAnsiString( &str, function );
nts = LdrGetProcedureAddress( hModule, &str, 0, (void**)&fp );
}
else
nts = LdrGetProcedureAddress( hModule, NULL, LOWORD(function), (void**)&fp );
if (nts != STATUS_SUCCESS)
{
SetLastError( RtlNtStatusToDosError( nts ) );
fp = NULL;
}
return fp;
}
/***********************************************************************
* DelayLoadFailureHook (KERNEL32.@)
*/
FARPROC WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function )
{
ULONG_PTR args[2];
if ((ULONG_PTR)function >> 16)
ERR( "failed to delay load %s.%s\n", name, function );
else
ERR( "failed to delay load %s.%u\n", name, LOWORD(function) );
args[0] = (ULONG_PTR)name;
args[1] = (ULONG_PTR)function;
RaiseException( EXCEPTION_WINE_STUB, EH_NONCONTINUABLE, 2, args );
return NULL;
}
#ifdef __i386__
/***********************************************************************
* __wine_dll_register_16 (KERNEL32.@)
*
* No longer used.
*/
void __wine_dll_register_16( const IMAGE_DOS_HEADER *header, const char *file_name )
{
ERR( "loading old style 16-bit dll %s no longer supported\n", file_name );
}
/***********************************************************************
* __wine_dll_unregister_16 (KERNEL32.@)
*
* No longer used.
*/
void __wine_dll_unregister_16( const IMAGE_DOS_HEADER *header )
{
}
#endif
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