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327 lines
8 KiB
C
327 lines
8 KiB
C
/*
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* Win32s Universal Thunk API
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*
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* Copyright 1999 Ulrich Weigand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h>
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#include "wine/winbase16.h"
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#include "windef.h"
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#include "winbase.h"
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#include "winreg.h"
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#include "winternl.h"
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#include "wownt32.h"
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#include "module.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(thunk);
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#include "pshpack1.h"
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typedef struct
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{
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BYTE popl_eax;
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BYTE pushl;
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DWORD target;
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BYTE pushl_eax;
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BYTE ljmp;
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DWORD utglue16;
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} UT16THUNK;
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typedef struct
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{
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BYTE popl_eax;
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BYTE pushl;
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DWORD target;
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BYTE pushl_eax;
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BYTE jmp;
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DWORD utglue32;
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} UT32THUNK;
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#include "poppack.h"
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typedef struct _UTINFO
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{
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struct _UTINFO *next;
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HMODULE hModule;
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HMODULE16 hModule16;
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UT16THUNK ut16;
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UT32THUNK ut32;
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} UTINFO;
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static UTINFO *UT_head; /* head of Universal Thunk list */
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typedef DWORD (CALLBACK *UTGLUEPROC)( LPVOID lpBuff, DWORD dwUserDefined );
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BOOL WINAPI UTRegister( HMODULE hModule, LPSTR lpsz16BITDLL,
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LPSTR lpszInitName, LPSTR lpszProcName,
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FARPROC *ppfn32Thunk, FARPROC pfnUT32CallBack,
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LPVOID lpBuff );
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VOID WINAPI UTUnRegister( HMODULE hModule );
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/****************************************************************************
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* UTGlue16 (KERNEL.666) (KERNEL Wine-specific export)
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*/
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DWORD WINAPI UTGlue16( LPVOID lpBuff, DWORD dwUserDefined, SEGPTR *translationList,
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UTGLUEPROC target )
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{
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INT i;
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/* Convert arguments to flat pointers */
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if ( translationList )
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for ( i = 0; translationList[i]; i++ )
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{
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LPVOID flatPtr = MapSL( translationList[i] );
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*(LPVOID *)flatPtr = MapSL( *(SEGPTR *)flatPtr );
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}
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/* Call 32-bit routine */
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return target( lpBuff, dwUserDefined );
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}
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/****************************************************************************
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* UTGlue32
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*/
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static DWORD WINAPI UTGlue32( FARPROC16 target, LPVOID lpBuff, DWORD dwUserDefined,
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LPVOID translationList[] )
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{
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SEGPTR segBuff, *segptrList = NULL;
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INT i, nList = 0;
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DWORD retv;
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WORD args[4];
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/* Convert arguments to SEGPTRs */
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if ( translationList )
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for ( nList = 0; translationList[nList]; nList++ )
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;
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if ( nList )
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{
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segptrList = HeapAlloc( GetProcessHeap(), 0, sizeof(SEGPTR)*nList );
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if ( !segptrList )
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{
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FIXME("Unable to allocate segptrList!\n" );
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return 0;
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}
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for ( i = 0; i < nList; i++ )
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segptrList[i] = *(SEGPTR *)translationList[i]
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= MapLS( *(LPVOID *)translationList[i] );
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}
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segBuff = MapLS( lpBuff );
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/* Call 16-bit routine */
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args[3] = SELECTOROF(segBuff);
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args[2] = OFFSETOF(segBuff);
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args[1] = HIWORD(dwUserDefined);
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args[0] = LOWORD(dwUserDefined);
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WOWCallback16Ex( (DWORD)target, WCB16_PASCAL, sizeof(args), args, &retv );
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/* Free temporary selectors */
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UnMapLS( segBuff );
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if ( nList )
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{
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for ( i = 0; i < nList; i++ )
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UnMapLS( segptrList[i] );
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HeapFree( GetProcessHeap(), 0, segptrList );
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}
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return retv;
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}
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/****************************************************************************
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* UTAlloc
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*/
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static UTINFO *UTAlloc( HMODULE hModule, HMODULE16 hModule16,
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FARPROC16 target16, FARPROC target32 )
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{
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static FARPROC16 UTGlue16_Segptr = NULL;
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UTINFO *ut;
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if ( !UTGlue16_Segptr )
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{
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HMODULE16 hModule = GetModuleHandle16( "KERNEL" );
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UTGlue16_Segptr = GetProcAddress16( hModule, "UTGlue16" );
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if ( !UTGlue16_Segptr ) return NULL;
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}
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ut = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(UTINFO) );
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if ( !ut ) return NULL;
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ut->hModule = hModule;
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ut->hModule16 = hModule16;
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ut->ut16.popl_eax = 0x58;
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ut->ut16.pushl = 0x68;
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ut->ut16.target = (DWORD)target32;
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ut->ut16.pushl_eax = 0x50;
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ut->ut16.ljmp = 0xea;
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ut->ut16.utglue16 = (DWORD)UTGlue16_Segptr;
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ut->ut32.popl_eax = 0x58;
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ut->ut32.pushl = 0x68;
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ut->ut32.target = (DWORD)target16;
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ut->ut32.pushl_eax = 0x50;
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ut->ut32.jmp = 0xe9;
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ut->ut32.utglue32 = (DWORD)UTGlue32 - ((DWORD)&ut->ut32.utglue32 + sizeof(DWORD));
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ut->next = UT_head;
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UT_head = ut;
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return ut;
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}
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/****************************************************************************
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* UTFree
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*/
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static void UTFree( UTINFO *ut )
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{
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UTINFO **ptr;
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for ( ptr = &UT_head; *ptr; ptr = &(*ptr)->next )
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if ( *ptr == ut )
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{
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*ptr = ut->next;
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break;
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}
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HeapFree( GetProcessHeap(), 0, ut );
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}
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/****************************************************************************
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* UTFind
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*/
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static UTINFO *UTFind( HMODULE hModule )
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{
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UTINFO *ut;
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for ( ut = UT_head; ut; ut =ut->next )
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if ( ut->hModule == hModule )
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break;
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return ut;
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}
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/****************************************************************************
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* UTRegister (KERNEL32.@)
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*/
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BOOL WINAPI UTRegister( HMODULE hModule, LPSTR lpsz16BITDLL,
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LPSTR lpszInitName, LPSTR lpszProcName,
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FARPROC *ppfn32Thunk, FARPROC pfnUT32CallBack,
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LPVOID lpBuff )
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{
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UTINFO *ut;
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HMODULE16 hModule16;
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FARPROC16 target16, init16;
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/* Load 16-bit DLL and get UTProc16 entry point */
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if ( (hModule16 = LoadLibrary16( lpsz16BITDLL )) <= 32
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|| (target16 = GetProcAddress16( hModule16, lpszProcName )) == 0 )
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return FALSE;
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/* Allocate UTINFO struct */
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RtlAcquirePebLock();
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if ( (ut = UTFind( hModule )) != NULL )
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ut = NULL;
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else
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ut = UTAlloc( hModule, hModule16, target16, pfnUT32CallBack );
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RtlReleasePebLock();
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if ( !ut )
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{
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FreeLibrary16( hModule16 );
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return FALSE;
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}
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/* Call UTInit16 if present */
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if ( lpszInitName
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&& (init16 = GetProcAddress16( hModule16, lpszInitName )) != 0 )
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{
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SEGPTR callback = MapLS( &ut->ut16 );
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SEGPTR segBuff = MapLS( lpBuff );
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WORD args[4];
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DWORD ret;
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args[3] = SELECTOROF(callback);
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args[2] = OFFSETOF(callback);
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args[1] = SELECTOROF(segBuff);
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args[0] = OFFSETOF(segBuff);
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WOWCallback16Ex( (DWORD)init16, WCB16_PASCAL, sizeof(args), args, &ret );
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UnMapLS( segBuff );
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UnMapLS( callback );
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if (!ret)
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{
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UTUnRegister( hModule );
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return FALSE;
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}
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}
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/* Return 32-bit thunk */
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*ppfn32Thunk = (FARPROC) &ut->ut32;
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return TRUE;
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}
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/****************************************************************************
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* UTUnRegister (KERNEL32.@)
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*/
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VOID WINAPI UTUnRegister( HMODULE hModule )
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{
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UTINFO *ut;
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HMODULE16 hModule16 = 0;
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RtlAcquirePebLock();
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ut = UTFind( hModule );
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if ( !ut )
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{
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hModule16 = ut->hModule16;
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UTFree( ut );
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}
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RtlReleasePebLock();
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if ( hModule16 )
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FreeLibrary16( hModule16 );
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}
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/****************************************************************************
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* UTInit (KERNEL.493)
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*/
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WORD WINAPI UTInit16( DWORD x1, DWORD x2, DWORD x3, DWORD x4 )
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{
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FIXME("(%08lx, %08lx, %08lx, %08lx): stub\n", x1, x2, x3, x4 );
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return 0;
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}
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