mirror of
git://source.winehq.org/git/wine.git
synced 2024-11-01 22:50:08 +00:00
510 lines
16 KiB
C
510 lines
16 KiB
C
/*
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* Win32 WOW Generic 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <errno.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 "winerror.h"
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#include "wownt32.h"
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#include "excpt.h"
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#include "winternl.h"
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#include "kernel16_private.h"
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#include "wine/exception.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(thunk);
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WINE_DECLARE_DEBUG_CHANNEL(relay);
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WINE_DECLARE_DEBUG_CHANNEL(snoop);
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/* symbols exported from relay16.s */
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extern DWORD WINAPI wine_call_to_16( FARPROC16 target, DWORD cbArgs, PEXCEPTION_HANDLER handler );
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extern void WINAPI wine_call_to_16_regs( CONTEXT *context, DWORD cbArgs, PEXCEPTION_HANDLER handler );
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extern void __wine_call_to_16_ret(void);
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extern void CALL32_CBClient_Ret(void);
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extern void CALL32_CBClientEx_Ret(void);
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extern BYTE __wine_call16_start[];
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extern BYTE __wine_call16_end[];
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static SEGPTR call16_ret_addr; /* segptr to __wine_call_to_16_ret routine */
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/***********************************************************************
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* WOWTHUNK_Init
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*/
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BOOL WOWTHUNK_Init(void)
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{
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/* allocate the code selector for CallTo16 routines */
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WORD codesel = SELECTOR_AllocBlock( __wine_call16_start,
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(BYTE *)(&CallTo16_TebSelector + 1) - __wine_call16_start,
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LDT_FLAGS_CODE | LDT_FLAGS_32BIT );
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if (!codesel) return FALSE;
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/* Patch the return addresses for CallTo16 routines */
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CallTo16_DataSelector = get_ds();
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call16_ret_addr = MAKESEGPTR( codesel, (BYTE *)__wine_call_to_16_ret - __wine_call16_start );
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CALL32_CBClient_RetAddr =
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MAKESEGPTR( codesel, (BYTE *)CALL32_CBClient_Ret - __wine_call16_start );
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CALL32_CBClientEx_RetAddr =
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MAKESEGPTR( codesel, (BYTE *)CALL32_CBClientEx_Ret - __wine_call16_start );
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if (TRACE_ON(relay) || TRACE_ON(snoop)) RELAY16_InitDebugLists();
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return TRUE;
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}
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/*************************************************************
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* fix_selector
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*
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* Fix a selector load that caused an exception if it's in the
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* 16-bit relay code.
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*/
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static BOOL fix_selector( CONTEXT *context )
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{
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WORD *stack;
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BYTE *instr = (BYTE *)context->Eip;
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if (instr < __wine_call16_start || instr >= __wine_call16_end) return FALSE;
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/* skip prefixes */
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while (*instr == 0x66 || *instr == 0x67) instr++;
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switch(instr[0])
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{
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case 0x07: /* pop es */
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case 0x17: /* pop ss */
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case 0x1f: /* pop ds */
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break;
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case 0x0f: /* extended instruction */
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switch(instr[1])
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{
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case 0xa1: /* pop fs */
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case 0xa9: /* pop gs */
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break;
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default:
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return FALSE;
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}
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break;
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default:
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return FALSE;
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}
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stack = ldt_get_ptr( context->SegSs, context->Esp );
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TRACE( "fixing up selector %x for pop instruction\n", *stack );
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*stack = 0;
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return TRUE;
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}
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/*************************************************************
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* call16_handler
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*
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* Handler for exceptions occurring in 16-bit code.
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*/
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static DWORD call16_handler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
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{
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/* unwinding: restore the stack pointer in the TEB, and leave the Win16 mutex */
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STACK32FRAME *frame32 = CONTAINING_RECORD(frame, STACK32FRAME, frame);
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NtCurrentTeb()->WOW32Reserved = (void *)frame32->frame16;
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_LeaveWin16Lock();
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}
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else if (record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION ||
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record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION)
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{
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if (ldt_is_system(context->SegCs))
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{
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if (fix_selector( context )) return ExceptionContinueExecution;
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}
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else
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{
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SEGPTR gpHandler;
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DWORD ret = __wine_emulate_instruction( record, context );
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if (ret != ExceptionContinueSearch) return ret;
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/* check for Win16 __GP handler */
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if ((gpHandler = HasGPHandler16( MAKESEGPTR( context->SegCs, context->Eip ) )))
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{
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WORD *stack = ldt_get_ptr( context->SegSs, context->Esp );
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*--stack = context->SegCs;
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*--stack = context->Eip;
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if (!IS_SELECTOR_32BIT(context->SegSs))
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context->Esp = MAKELONG( LOWORD(context->Esp - 2*sizeof(WORD)),
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HIWORD(context->Esp) );
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else
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context->Esp -= 2*sizeof(WORD);
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context->SegCs = SELECTOROF( gpHandler );
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context->Eip = OFFSETOF( gpHandler );
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return ExceptionContinueExecution;
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}
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}
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}
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return ExceptionContinueSearch;
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}
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/*
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* 32-bit WOW routines (in WOW32, but actually forwarded to KERNEL32)
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*/
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/**********************************************************************
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* K32WOWGetDescriptor (KERNEL32.70)
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*/
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BOOL WINAPI K32WOWGetDescriptor( SEGPTR segptr, LPLDT_ENTRY ldtent )
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{
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return GetThreadSelectorEntry( GetCurrentThread(),
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segptr >> 16, ldtent );
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}
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/**********************************************************************
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* K32WOWGetVDMPointer (KERNEL32.56)
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*/
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LPVOID WINAPI K32WOWGetVDMPointer( DWORD vp, DWORD dwBytes, BOOL fProtectedMode )
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{
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/* FIXME: add size check too */
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if ( fProtectedMode )
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return MapSL( vp );
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else
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return DOSMEM_MapRealToLinear( vp );
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}
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/**********************************************************************
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* K32WOWGetVDMPointerFix (KERNEL32.68)
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*/
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LPVOID WINAPI K32WOWGetVDMPointerFix( DWORD vp, DWORD dwBytes, BOOL fProtectedMode )
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{
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/*
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* Hmmm. According to the docu, we should call:
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*
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* GlobalFix16( SELECTOROF(vp) );
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*
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* But this is unnecessary under Wine, as we never move global
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* memory segments in linear memory anyway.
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*
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* (I'm not so sure what we are *supposed* to do if
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* fProtectedMode is TRUE, anyway ...)
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*/
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return K32WOWGetVDMPointer( vp, dwBytes, fProtectedMode );
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}
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/**********************************************************************
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* K32WOWGetVDMPointerUnfix (KERNEL32.69)
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*/
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VOID WINAPI K32WOWGetVDMPointerUnfix( DWORD vp )
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{
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/*
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* See above why we don't call:
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*
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* GlobalUnfix16( SELECTOROF(vp) );
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*
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*/
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}
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/**********************************************************************
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* K32WOWGlobalAlloc16 (KERNEL32.59)
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*/
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WORD WINAPI K32WOWGlobalAlloc16( WORD wFlags, DWORD cb )
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{
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return (WORD)GlobalAlloc16( wFlags, cb );
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}
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/**********************************************************************
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* K32WOWGlobalFree16 (KERNEL32.62)
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*/
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WORD WINAPI K32WOWGlobalFree16( WORD hMem )
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{
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return (WORD)GlobalFree16( (HGLOBAL16)hMem );
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}
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/**********************************************************************
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* K32WOWGlobalUnlock16 (KERNEL32.61)
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*/
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BOOL WINAPI K32WOWGlobalUnlock16( WORD hMem )
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{
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return (BOOL)GlobalUnlock16( (HGLOBAL16)hMem );
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}
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/**********************************************************************
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* K32WOWGlobalAllocLock16 (KERNEL32.63)
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*/
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DWORD WINAPI K32WOWGlobalAllocLock16( WORD wFlags, DWORD cb, WORD *phMem )
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{
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WORD hMem = K32WOWGlobalAlloc16( wFlags, cb );
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if (phMem) *phMem = hMem;
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return K32WOWGlobalLock16( hMem );
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}
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/**********************************************************************
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* K32WOWGlobalLockSize16 (KERNEL32.65)
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*/
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DWORD WINAPI K32WOWGlobalLockSize16( WORD hMem, PDWORD pcb )
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{
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if ( pcb )
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*pcb = GlobalSize16( (HGLOBAL16)hMem );
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return K32WOWGlobalLock16( hMem );
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}
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/**********************************************************************
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* K32WOWGlobalUnlockFree16 (KERNEL32.64)
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*/
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WORD WINAPI K32WOWGlobalUnlockFree16( DWORD vpMem )
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{
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if ( !K32WOWGlobalUnlock16( HIWORD(vpMem) ) )
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return FALSE;
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return K32WOWGlobalFree16( HIWORD(vpMem) );
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}
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/**********************************************************************
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* K32WOWYield16 (KERNEL32.66)
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*/
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VOID WINAPI K32WOWYield16( void )
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{
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/*
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* This does the right thing for both Win16 and Win32 tasks.
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* More or less, at least :-/
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*/
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Yield16();
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}
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/**********************************************************************
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* K32WOWDirectedYield16 (KERNEL32.67)
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*/
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VOID WINAPI K32WOWDirectedYield16( WORD htask16 )
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{
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/*
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* Argh. Our scheduler doesn't like DirectedYield by Win32
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* tasks at all. So we do hope that this routine is indeed
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* only ever called by Win16 tasks that have thunked up ...
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*/
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DirectedYield16( (HTASK16)htask16 );
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}
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/***********************************************************************
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* K32WOWHandle32 (KERNEL32.57)
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*/
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HANDLE WINAPI K32WOWHandle32( WORD handle, WOW_HANDLE_TYPE type )
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{
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switch ( type )
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{
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case WOW_TYPE_HWND:
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case WOW_TYPE_HMENU:
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case WOW_TYPE_HDWP:
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case WOW_TYPE_HDROP:
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case WOW_TYPE_HDC:
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case WOW_TYPE_HFONT:
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case WOW_TYPE_HRGN:
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case WOW_TYPE_HBITMAP:
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case WOW_TYPE_HBRUSH:
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case WOW_TYPE_HPALETTE:
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case WOW_TYPE_HPEN:
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case WOW_TYPE_HACCEL:
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return (HANDLE)(ULONG_PTR)handle;
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case WOW_TYPE_HMETAFILE:
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FIXME( "conversion of metafile handles not supported yet\n" );
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return (HANDLE)(ULONG_PTR)handle;
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case WOW_TYPE_HTASK:
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return ((TDB *)GlobalLock16(handle))->teb->ClientId.UniqueThread;
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case WOW_TYPE_FULLHWND:
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FIXME( "conversion of full window handles not supported yet\n" );
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return (HANDLE)(ULONG_PTR)handle;
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default:
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ERR( "handle 0x%04x of unknown type %d\n", handle, type );
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return (HANDLE)(ULONG_PTR)handle;
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}
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}
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/***********************************************************************
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* K32WOWHandle16 (KERNEL32.58)
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*/
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WORD WINAPI K32WOWHandle16( HANDLE handle, WOW_HANDLE_TYPE type )
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{
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switch ( type )
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{
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case WOW_TYPE_HWND:
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case WOW_TYPE_HMENU:
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case WOW_TYPE_HDWP:
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case WOW_TYPE_HDROP:
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case WOW_TYPE_HDC:
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case WOW_TYPE_HFONT:
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case WOW_TYPE_HRGN:
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case WOW_TYPE_HBITMAP:
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case WOW_TYPE_HBRUSH:
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case WOW_TYPE_HPALETTE:
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case WOW_TYPE_HPEN:
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case WOW_TYPE_HACCEL:
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case WOW_TYPE_FULLHWND:
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if ( HIWORD(handle ) )
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ERR( "handle %p of type %d has non-zero HIWORD\n", handle, type );
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return LOWORD(handle);
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case WOW_TYPE_HMETAFILE:
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FIXME( "conversion of metafile handles not supported yet\n" );
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return LOWORD(handle);
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case WOW_TYPE_HTASK:
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return TASK_GetTaskFromThread( (DWORD)handle );
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default:
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ERR( "handle %p of unknown type %d\n", handle, type );
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return LOWORD(handle);
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}
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}
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/**********************************************************************
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* K32WOWCallback16Ex (KERNEL32.55)
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*/
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BOOL WINAPI K32WOWCallback16Ex( DWORD vpfn16, DWORD dwFlags,
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DWORD cbArgs, LPVOID pArgs, LPDWORD pdwRetCode )
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{
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/*
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* Arguments must be prepared in the correct order by the caller
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* (both for PASCAL and CDECL calling convention), so we simply
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* copy them to the 16-bit stack ...
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*/
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char *stack = (char *)CURRENT_STACK16 - cbArgs;
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memcpy( stack, pArgs, cbArgs );
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if (dwFlags & (WCB16_REGS|WCB16_REGS_LONG))
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{
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CONTEXT *context = (CONTEXT *)pdwRetCode;
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if (TRACE_ON(relay))
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{
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DWORD count = cbArgs / sizeof(WORD);
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WORD * wstack = (WORD *)stack;
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TRACE_(relay)( "\1CallTo16(func=%04x:%04x", context->SegCs, LOWORD(context->Eip) );
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while (count) TRACE_(relay)( ",%04x", wstack[--count] );
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TRACE_(relay)( ") ss:sp=%04x:%04x ax=%04x bx=%04x cx=%04x dx=%04x si=%04x di=%04x bp=%04x ds=%04x es=%04x\n",
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SELECTOROF(NtCurrentTeb()->WOW32Reserved),
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OFFSETOF(NtCurrentTeb()->WOW32Reserved),
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(WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx,
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(WORD)context->Edx, (WORD)context->Esi, (WORD)context->Edi,
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(WORD)context->Ebp, (WORD)context->SegDs, (WORD)context->SegEs );
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SYSLEVEL_CheckNotLevel( 2 );
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}
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/* push return address */
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if (dwFlags & WCB16_REGS_LONG)
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{
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stack -= sizeof(DWORD);
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*((DWORD *)stack) = HIWORD(call16_ret_addr);
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stack -= sizeof(DWORD);
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*((DWORD *)stack) = LOWORD(call16_ret_addr);
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cbArgs += 2 * sizeof(DWORD);
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}
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else
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{
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stack -= sizeof(SEGPTR);
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*((SEGPTR *)stack) = call16_ret_addr;
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cbArgs += sizeof(SEGPTR);
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}
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_EnterWin16Lock();
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wine_call_to_16_regs( context, cbArgs, call16_handler );
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_LeaveWin16Lock();
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if (TRACE_ON(relay))
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{
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TRACE_(relay)( "\1RetFrom16() ss:sp=%04x:%04x ax=%04x bx=%04x cx=%04x dx=%04x bp=%04x sp=%04x\n",
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SELECTOROF(NtCurrentTeb()->WOW32Reserved),
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OFFSETOF(NtCurrentTeb()->WOW32Reserved),
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(WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx,
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(WORD)context->Edx, (WORD)context->Ebp, (WORD)context->Esp );
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SYSLEVEL_CheckNotLevel( 2 );
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}
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}
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else
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{
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DWORD ret;
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if (TRACE_ON(relay))
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{
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DWORD count = cbArgs / sizeof(WORD);
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WORD * wstack = (WORD *)stack;
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TRACE_(relay)( "\1CallTo16(func=%04x:%04x,ds=%04x",
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HIWORD(vpfn16), LOWORD(vpfn16), SELECTOROF(NtCurrentTeb()->WOW32Reserved) );
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while (count) TRACE_(relay)( ",%04x", wstack[--count] );
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TRACE_(relay)( ") ss:sp=%04x:%04x\n", SELECTOROF(NtCurrentTeb()->WOW32Reserved),
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OFFSETOF(NtCurrentTeb()->WOW32Reserved) );
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SYSLEVEL_CheckNotLevel( 2 );
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}
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/* push return address */
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stack -= sizeof(SEGPTR);
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*((SEGPTR *)stack) = call16_ret_addr;
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cbArgs += sizeof(SEGPTR);
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/*
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* Actually, we should take care whether the called routine cleans up
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* its stack or not. Fortunately, our wine_call_to_16 core doesn't rely on
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* the callee to do so; after the routine has returned, the 16-bit
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* stack pointer is always reset to the position it had before.
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*/
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_EnterWin16Lock();
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ret = wine_call_to_16( (FARPROC16)vpfn16, cbArgs, call16_handler );
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if (pdwRetCode) *pdwRetCode = ret;
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_LeaveWin16Lock();
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if (TRACE_ON(relay))
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{
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TRACE_(relay)( "\1RetFrom16() ss:sp=%04x:%04x retval=%08x\n",
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SELECTOROF(NtCurrentTeb()->WOW32Reserved),
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OFFSETOF(NtCurrentTeb()->WOW32Reserved), ret );
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SYSLEVEL_CheckNotLevel( 2 );
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}
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}
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return TRUE; /* success */
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}
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/**********************************************************************
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* K32WOWCallback16 (KERNEL32.54)
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*/
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DWORD WINAPI K32WOWCallback16( DWORD vpfn16, DWORD dwParam )
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{
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DWORD ret;
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if ( !K32WOWCallback16Ex( vpfn16, WCB16_PASCAL,
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sizeof(DWORD), &dwParam, &ret ) )
|
|
ret = 0L;
|
|
|
|
return ret;
|
|
}
|