| /* |
| * Win32 WOW Generic Thunk API |
| * |
| * Copyright 1999 Ulrich Weigand |
| * |
| * 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 <assert.h> |
| #include <stdarg.h> |
| #include <errno.h> |
| |
| #include "wine/winbase16.h" |
| #include "windef.h" |
| #include "winbase.h" |
| #include "winerror.h" |
| #include "wownt32.h" |
| #include "excpt.h" |
| #include "winternl.h" |
| #include "kernel16_private.h" |
| #include "wine/exception.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(thunk); |
| WINE_DECLARE_DEBUG_CHANNEL(relay); |
| WINE_DECLARE_DEBUG_CHANNEL(snoop); |
| |
| /* symbols exported from relay16.s */ |
| extern DWORD WINAPI wine_call_to_16( FARPROC16 target, DWORD cbArgs, PEXCEPTION_HANDLER handler ); |
| extern void WINAPI wine_call_to_16_regs( CONTEXT *context, DWORD cbArgs, PEXCEPTION_HANDLER handler ); |
| extern void __wine_call_to_16_ret(void); |
| extern void CALL32_CBClient_Ret(void); |
| extern void CALL32_CBClientEx_Ret(void); |
| extern void DPMI_PendingEventCheck(void); |
| extern void DPMI_PendingEventCheck_Cleanup(void); |
| extern void DPMI_PendingEventCheck_Return(void); |
| extern BYTE __wine_call16_start[]; |
| extern BYTE __wine_call16_end[]; |
| |
| static SEGPTR call16_ret_addr; /* segptr to __wine_call_to_16_ret routine */ |
| |
| static WORD dpmi_checker_selector; |
| static DWORD dpmi_checker_offset_call; |
| static DWORD dpmi_checker_offset_cleanup; |
| static DWORD dpmi_checker_offset_return; |
| |
| /*********************************************************************** |
| * WOWTHUNK_Init |
| */ |
| BOOL WOWTHUNK_Init(void) |
| { |
| /* allocate the code selector for CallTo16 routines */ |
| LDT_ENTRY entry; |
| WORD codesel = wine_ldt_alloc_entries(1); |
| |
| if (!codesel) return FALSE; |
| wine_ldt_set_base( &entry, __wine_call16_start ); |
| wine_ldt_set_limit( &entry, (BYTE *)(&CallTo16_TebSelector + 1) - __wine_call16_start - 1 ); |
| wine_ldt_set_flags( &entry, WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT ); |
| wine_ldt_set_entry( codesel, &entry ); |
| |
| /* Patch the return addresses for CallTo16 routines */ |
| |
| CallTo16_DataSelector = wine_get_ds(); |
| call16_ret_addr = MAKESEGPTR( codesel, (BYTE *)__wine_call_to_16_ret - __wine_call16_start ); |
| CALL32_CBClient_RetAddr = |
| MAKESEGPTR( codesel, (BYTE *)CALL32_CBClient_Ret - __wine_call16_start ); |
| CALL32_CBClientEx_RetAddr = |
| MAKESEGPTR( codesel, (BYTE *)CALL32_CBClientEx_Ret - __wine_call16_start ); |
| |
| /* Prepare selector and offsets for DPMI event checking. */ |
| dpmi_checker_selector = codesel; |
| dpmi_checker_offset_call = (BYTE *)DPMI_PendingEventCheck - __wine_call16_start; |
| dpmi_checker_offset_cleanup = (BYTE *)DPMI_PendingEventCheck_Cleanup - __wine_call16_start; |
| dpmi_checker_offset_return = (BYTE *)DPMI_PendingEventCheck_Return - __wine_call16_start; |
| |
| if (TRACE_ON(relay) || TRACE_ON(snoop)) RELAY16_InitDebugLists(); |
| |
| return TRUE; |
| } |
| |
| |
| /************************************************************* |
| * fix_selector |
| * |
| * Fix a selector load that caused an exception if it's in the |
| * 16-bit relay code. |
| */ |
| static BOOL fix_selector( CONTEXT *context ) |
| { |
| WORD *stack; |
| BYTE *instr = (BYTE *)context->Eip; |
| |
| if (instr < __wine_call16_start || instr >= __wine_call16_end) return FALSE; |
| |
| /* skip prefixes */ |
| while (*instr == 0x66 || *instr == 0x67) instr++; |
| |
| switch(instr[0]) |
| { |
| case 0x07: /* pop es */ |
| case 0x17: /* pop ss */ |
| case 0x1f: /* pop ds */ |
| break; |
| case 0x0f: /* extended instruction */ |
| switch(instr[1]) |
| { |
| case 0xa1: /* pop fs */ |
| case 0xa9: /* pop gs */ |
| break; |
| default: |
| return FALSE; |
| } |
| break; |
| default: |
| return FALSE; |
| } |
| stack = wine_ldt_get_ptr( context->SegSs, context->Esp ); |
| TRACE( "fixing up selector %x for pop instruction\n", *stack ); |
| *stack = 0; |
| return TRUE; |
| } |
| |
| |
| /************************************************************* |
| * insert_event_check |
| * |
| * Make resuming the context check for pending DPMI events |
| * before the original context is restored. This is required |
| * because DPMI events are asynchronous, they are blocked while |
| * Wine 32-bit code is being executed and we want to prevent |
| * a race when returning back to 16-bit or 32-bit DPMI context. |
| */ |
| static void insert_event_check( CONTEXT *context ) |
| { |
| char *stack = wine_ldt_get_ptr( context->SegSs, context->Esp ); |
| |
| /* don't do event check while in system code */ |
| if (wine_ldt_is_system(context->SegCs)) |
| return; |
| |
| if(context->SegCs == dpmi_checker_selector && |
| context->Eip >= dpmi_checker_offset_call && |
| context->Eip <= dpmi_checker_offset_cleanup) |
| { |
| /* |
| * Nested call. Stack will be preserved. |
| */ |
| } |
| else if(context->SegCs == dpmi_checker_selector && |
| context->Eip == dpmi_checker_offset_return) |
| { |
| /* |
| * Nested call. We have just finished popping the fs |
| * register, lets put it back into stack. |
| */ |
| |
| stack -= sizeof(WORD); |
| *(WORD*)stack = context->SegFs; |
| |
| context->Esp -= 2; |
| } |
| else |
| { |
| /* |
| * Call is not nested. |
| * Push modified registers into stack. |
| * These will be popped by the assembler stub. |
| */ |
| |
| stack -= sizeof(DWORD); |
| *(DWORD*)stack = context->EFlags; |
| |
| stack -= sizeof(DWORD); |
| *(DWORD*)stack = context->SegCs; |
| |
| stack -= sizeof(DWORD); |
| *(DWORD*)stack = context->Eip; |
| |
| stack -= sizeof(WORD); |
| *(WORD*)stack = context->SegFs; |
| |
| context->Esp -= 14; |
| } |
| |
| /* |
| * Modify the context so that we jump into assembler stub. |
| * TEB access is made easier by providing the stub |
| * with the correct fs register value. |
| */ |
| |
| context->SegCs = dpmi_checker_selector; |
| context->Eip = dpmi_checker_offset_call; |
| context->SegFs = wine_get_fs(); |
| } |
| |
| |
| /************************************************************* |
| * call16_handler |
| * |
| * Handler for exceptions occurring in 16-bit code. |
| */ |
| static DWORD call16_handler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame, |
| CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher ) |
| { |
| if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) |
| { |
| /* unwinding: restore the stack pointer in the TEB, and leave the Win16 mutex */ |
| STACK32FRAME *frame32 = CONTAINING_RECORD(frame, STACK32FRAME, frame); |
| NtCurrentTeb()->WOW32Reserved = (void *)frame32->frame16; |
| _LeaveWin16Lock(); |
| } |
| else if (record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION || |
| record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION) |
| { |
| if (wine_ldt_is_system(context->SegCs)) |
| { |
| if (fix_selector( context )) return ExceptionContinueExecution; |
| } |
| else |
| { |
| SEGPTR gpHandler; |
| DWORD ret = __wine_emulate_instruction( record, context ); |
| |
| /* |
| * Insert check for pending DPMI events. Note that this |
| * check must be inserted after instructions have been |
| * emulated because the instruction emulation requires |
| * original CS:IP and the emulation may change TEB.dpmi_vif. |
| */ |
| if(get_vm86_teb_info()->dpmi_vif) |
| insert_event_check( context ); |
| |
| if (ret != ExceptionContinueSearch) return ret; |
| |
| /* check for Win16 __GP handler */ |
| if ((gpHandler = HasGPHandler16( MAKESEGPTR( context->SegCs, context->Eip ) ))) |
| { |
| WORD *stack = wine_ldt_get_ptr( context->SegSs, context->Esp ); |
| *--stack = context->SegCs; |
| *--stack = context->Eip; |
| |
| if (!IS_SELECTOR_32BIT(context->SegSs)) |
| context->Esp = MAKELONG( LOWORD(context->Esp - 2*sizeof(WORD)), |
| HIWORD(context->Esp) ); |
| else |
| context->Esp -= 2*sizeof(WORD); |
| |
| context->SegCs = SELECTOROF( gpHandler ); |
| context->Eip = OFFSETOF( gpHandler ); |
| return ExceptionContinueExecution; |
| } |
| } |
| } |
| else if (record->ExceptionCode == EXCEPTION_VM86_STI) |
| { |
| insert_event_check( context ); |
| } |
| return ExceptionContinueSearch; |
| } |
| |
| |
| /************************************************************* |
| * vm86_handler |
| * |
| * Handler for exceptions occurring in vm86 code. |
| */ |
| static DWORD vm86_handler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame, |
| CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher ) |
| { |
| if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) |
| return ExceptionContinueSearch; |
| |
| if (record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION || |
| record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION) |
| { |
| return __wine_emulate_instruction( record, context ); |
| } |
| |
| return ExceptionContinueSearch; |
| } |
| |
| |
| /* |
| * 32-bit WOW routines (in WOW32, but actually forwarded to KERNEL32) |
| */ |
| |
| /********************************************************************** |
| * K32WOWGetDescriptor (KERNEL32.70) |
| */ |
| BOOL WINAPI K32WOWGetDescriptor( SEGPTR segptr, LPLDT_ENTRY ldtent ) |
| { |
| return GetThreadSelectorEntry( GetCurrentThread(), |
| segptr >> 16, ldtent ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGetVDMPointer (KERNEL32.56) |
| */ |
| LPVOID WINAPI K32WOWGetVDMPointer( DWORD vp, DWORD dwBytes, BOOL fProtectedMode ) |
| { |
| /* FIXME: add size check too */ |
| |
| if ( fProtectedMode ) |
| return MapSL( vp ); |
| else |
| return DOSMEM_MapRealToLinear( vp ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGetVDMPointerFix (KERNEL32.68) |
| */ |
| LPVOID WINAPI K32WOWGetVDMPointerFix( DWORD vp, DWORD dwBytes, BOOL fProtectedMode ) |
| { |
| /* |
| * Hmmm. According to the docu, we should call: |
| * |
| * GlobalFix16( SELECTOROF(vp) ); |
| * |
| * But this is unnecessary under Wine, as we never move global |
| * memory segments in linear memory anyway. |
| * |
| * (I'm not so sure what we are *supposed* to do if |
| * fProtectedMode is TRUE, anyway ...) |
| */ |
| |
| return K32WOWGetVDMPointer( vp, dwBytes, fProtectedMode ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGetVDMPointerUnfix (KERNEL32.69) |
| */ |
| VOID WINAPI K32WOWGetVDMPointerUnfix( DWORD vp ) |
| { |
| /* |
| * See above why we don't call: |
| * |
| * GlobalUnfix16( SELECTOROF(vp) ); |
| * |
| */ |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalAlloc16 (KERNEL32.59) |
| */ |
| WORD WINAPI K32WOWGlobalAlloc16( WORD wFlags, DWORD cb ) |
| { |
| return (WORD)GlobalAlloc16( wFlags, cb ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalFree16 (KERNEL32.62) |
| */ |
| WORD WINAPI K32WOWGlobalFree16( WORD hMem ) |
| { |
| return (WORD)GlobalFree16( (HGLOBAL16)hMem ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalUnlock16 (KERNEL32.61) |
| */ |
| BOOL WINAPI K32WOWGlobalUnlock16( WORD hMem ) |
| { |
| return (BOOL)GlobalUnlock16( (HGLOBAL16)hMem ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalAllocLock16 (KERNEL32.63) |
| */ |
| DWORD WINAPI K32WOWGlobalAllocLock16( WORD wFlags, DWORD cb, WORD *phMem ) |
| { |
| WORD hMem = K32WOWGlobalAlloc16( wFlags, cb ); |
| if (phMem) *phMem = hMem; |
| |
| return K32WOWGlobalLock16( hMem ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalLockSize16 (KERNEL32.65) |
| */ |
| DWORD WINAPI K32WOWGlobalLockSize16( WORD hMem, PDWORD pcb ) |
| { |
| if ( pcb ) |
| *pcb = GlobalSize16( (HGLOBAL16)hMem ); |
| |
| return K32WOWGlobalLock16( hMem ); |
| } |
| |
| /********************************************************************** |
| * K32WOWGlobalUnlockFree16 (KERNEL32.64) |
| */ |
| WORD WINAPI K32WOWGlobalUnlockFree16( DWORD vpMem ) |
| { |
| if ( !K32WOWGlobalUnlock16( HIWORD(vpMem) ) ) |
| return FALSE; |
| |
| return K32WOWGlobalFree16( HIWORD(vpMem) ); |
| } |
| |
| |
| /********************************************************************** |
| * K32WOWYield16 (KERNEL32.66) |
| */ |
| VOID WINAPI K32WOWYield16( void ) |
| { |
| /* |
| * This does the right thing for both Win16 and Win32 tasks. |
| * More or less, at least :-/ |
| */ |
| Yield16(); |
| } |
| |
| /********************************************************************** |
| * K32WOWDirectedYield16 (KERNEL32.67) |
| */ |
| VOID WINAPI K32WOWDirectedYield16( WORD htask16 ) |
| { |
| /* |
| * Argh. Our scheduler doesn't like DirectedYield by Win32 |
| * tasks at all. So we do hope that this routine is indeed |
| * only ever called by Win16 tasks that have thunked up ... |
| */ |
| DirectedYield16( (HTASK16)htask16 ); |
| } |
| |
| |
| /*********************************************************************** |
| * K32WOWHandle32 (KERNEL32.57) |
| */ |
| HANDLE WINAPI K32WOWHandle32( WORD handle, WOW_HANDLE_TYPE type ) |
| { |
| switch ( type ) |
| { |
| case WOW_TYPE_HWND: |
| case WOW_TYPE_HMENU: |
| case WOW_TYPE_HDWP: |
| case WOW_TYPE_HDROP: |
| case WOW_TYPE_HDC: |
| case WOW_TYPE_HFONT: |
| case WOW_TYPE_HRGN: |
| case WOW_TYPE_HBITMAP: |
| case WOW_TYPE_HBRUSH: |
| case WOW_TYPE_HPALETTE: |
| case WOW_TYPE_HPEN: |
| case WOW_TYPE_HACCEL: |
| return (HANDLE)(ULONG_PTR)handle; |
| |
| case WOW_TYPE_HMETAFILE: |
| FIXME( "conversion of metafile handles not supported yet\n" ); |
| return (HANDLE)(ULONG_PTR)handle; |
| |
| case WOW_TYPE_HTASK: |
| return ((TDB *)GlobalLock16(handle))->teb->ClientId.UniqueThread; |
| |
| case WOW_TYPE_FULLHWND: |
| FIXME( "conversion of full window handles not supported yet\n" ); |
| return (HANDLE)(ULONG_PTR)handle; |
| |
| default: |
| ERR( "handle 0x%04x of unknown type %d\n", handle, type ); |
| return (HANDLE)(ULONG_PTR)handle; |
| } |
| } |
| |
| /*********************************************************************** |
| * K32WOWHandle16 (KERNEL32.58) |
| */ |
| WORD WINAPI K32WOWHandle16( HANDLE handle, WOW_HANDLE_TYPE type ) |
| { |
| switch ( type ) |
| { |
| case WOW_TYPE_HWND: |
| case WOW_TYPE_HMENU: |
| case WOW_TYPE_HDWP: |
| case WOW_TYPE_HDROP: |
| case WOW_TYPE_HDC: |
| case WOW_TYPE_HFONT: |
| case WOW_TYPE_HRGN: |
| case WOW_TYPE_HBITMAP: |
| case WOW_TYPE_HBRUSH: |
| case WOW_TYPE_HPALETTE: |
| case WOW_TYPE_HPEN: |
| case WOW_TYPE_HACCEL: |
| case WOW_TYPE_FULLHWND: |
| if ( HIWORD(handle ) ) |
| ERR( "handle %p of type %d has non-zero HIWORD\n", handle, type ); |
| return LOWORD(handle); |
| |
| case WOW_TYPE_HMETAFILE: |
| FIXME( "conversion of metafile handles not supported yet\n" ); |
| return LOWORD(handle); |
| |
| case WOW_TYPE_HTASK: |
| return TASK_GetTaskFromThread( (DWORD)handle ); |
| |
| default: |
| ERR( "handle %p of unknown type %d\n", handle, type ); |
| return LOWORD(handle); |
| } |
| } |
| |
| /********************************************************************** |
| * K32WOWCallback16Ex (KERNEL32.55) |
| */ |
| BOOL WINAPI K32WOWCallback16Ex( DWORD vpfn16, DWORD dwFlags, |
| DWORD cbArgs, LPVOID pArgs, LPDWORD pdwRetCode ) |
| { |
| /* |
| * Arguments must be prepared in the correct order by the caller |
| * (both for PASCAL and CDECL calling convention), so we simply |
| * copy them to the 16-bit stack ... |
| */ |
| char *stack = (char *)CURRENT_STACK16 - cbArgs; |
| |
| memcpy( stack, pArgs, cbArgs ); |
| |
| if (dwFlags & (WCB16_REGS|WCB16_REGS_LONG)) |
| { |
| CONTEXT *context = (CONTEXT *)pdwRetCode; |
| |
| if (TRACE_ON(relay)) |
| { |
| DWORD count = cbArgs / sizeof(WORD); |
| WORD * wstack = (WORD *)stack; |
| |
| DPRINTF("%04x:CallTo16(func=%04x:%04x,ds=%04x", |
| GetCurrentThreadId(), |
| context->SegCs, LOWORD(context->Eip), context->SegDs ); |
| while (count) DPRINTF( ",%04x", wstack[--count] ); |
| DPRINTF(") ss:sp=%04x:%04x", |
| SELECTOROF(NtCurrentTeb()->WOW32Reserved), OFFSETOF(NtCurrentTeb()->WOW32Reserved) ); |
| DPRINTF(" ax=%04x bx=%04x cx=%04x dx=%04x si=%04x di=%04x bp=%04x es=%04x fs=%04x\n", |
| (WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx, |
| (WORD)context->Edx, (WORD)context->Esi, (WORD)context->Edi, |
| (WORD)context->Ebp, (WORD)context->SegEs, (WORD)context->SegFs ); |
| SYSLEVEL_CheckNotLevel( 2 ); |
| } |
| |
| if (context->EFlags & 0x00020000) /* v86 mode */ |
| { |
| EXCEPTION_REGISTRATION_RECORD frame; |
| frame.Handler = vm86_handler; |
| errno = 0; |
| __wine_push_frame( &frame ); |
| __wine_enter_vm86( context ); |
| __wine_pop_frame( &frame ); |
| if (errno != 0) /* enter_vm86 will fail with ENOSYS on x64 kernels */ |
| { |
| WARN("__wine_enter_vm86 failed (errno=%d)\n", errno); |
| if (errno == ENOSYS) |
| SetLastError(ERROR_NOT_SUPPORTED); |
| else |
| SetLastError(ERROR_GEN_FAILURE); |
| return FALSE; |
| } |
| } |
| else |
| { |
| /* push return address */ |
| if (dwFlags & WCB16_REGS_LONG) |
| { |
| stack -= sizeof(DWORD); |
| *((DWORD *)stack) = HIWORD(call16_ret_addr); |
| stack -= sizeof(DWORD); |
| *((DWORD *)stack) = LOWORD(call16_ret_addr); |
| cbArgs += 2 * sizeof(DWORD); |
| } |
| else |
| { |
| stack -= sizeof(SEGPTR); |
| *((SEGPTR *)stack) = call16_ret_addr; |
| cbArgs += sizeof(SEGPTR); |
| } |
| |
| /* |
| * Start call by checking for pending events. |
| * Note that wine_call_to_16_regs overwrites context stack |
| * pointer so we may modify it here without a problem. |
| */ |
| if (get_vm86_teb_info()->dpmi_vif) |
| { |
| context->SegSs = wine_get_ds(); |
| context->Esp = (DWORD)stack; |
| insert_event_check( context ); |
| cbArgs += (DWORD)stack - context->Esp; |
| } |
| |
| _EnterWin16Lock(); |
| wine_call_to_16_regs( context, cbArgs, call16_handler ); |
| _LeaveWin16Lock(); |
| } |
| |
| if (TRACE_ON(relay)) |
| { |
| DPRINTF("%04x:RetFrom16() ss:sp=%04x:%04x ", |
| GetCurrentThreadId(), SELECTOROF(NtCurrentTeb()->WOW32Reserved), |
| OFFSETOF(NtCurrentTeb()->WOW32Reserved)); |
| DPRINTF(" ax=%04x bx=%04x cx=%04x dx=%04x bp=%04x sp=%04x\n", |
| (WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx, |
| (WORD)context->Edx, (WORD)context->Ebp, (WORD)context->Esp ); |
| SYSLEVEL_CheckNotLevel( 2 ); |
| } |
| } |
| else |
| { |
| DWORD ret; |
| |
| if (TRACE_ON(relay)) |
| { |
| DWORD count = cbArgs / sizeof(WORD); |
| WORD * wstack = (WORD *)stack; |
| |
| DPRINTF("%04x:CallTo16(func=%04x:%04x,ds=%04x", |
| GetCurrentThreadId(), HIWORD(vpfn16), LOWORD(vpfn16), |
| SELECTOROF(NtCurrentTeb()->WOW32Reserved) ); |
| while (count) DPRINTF( ",%04x", wstack[--count] ); |
| DPRINTF(") ss:sp=%04x:%04x\n", |
| SELECTOROF(NtCurrentTeb()->WOW32Reserved), OFFSETOF(NtCurrentTeb()->WOW32Reserved) ); |
| SYSLEVEL_CheckNotLevel( 2 ); |
| } |
| |
| /* push return address */ |
| stack -= sizeof(SEGPTR); |
| *((SEGPTR *)stack) = call16_ret_addr; |
| cbArgs += sizeof(SEGPTR); |
| |
| /* |
| * Actually, we should take care whether the called routine cleans up |
| * its stack or not. Fortunately, our wine_call_to_16 core doesn't rely on |
| * the callee to do so; after the routine has returned, the 16-bit |
| * stack pointer is always reset to the position it had before. |
| */ |
| _EnterWin16Lock(); |
| ret = wine_call_to_16( (FARPROC16)vpfn16, cbArgs, call16_handler ); |
| if (pdwRetCode) *pdwRetCode = ret; |
| _LeaveWin16Lock(); |
| |
| if (TRACE_ON(relay)) |
| { |
| DPRINTF("%04x:RetFrom16() ss:sp=%04x:%04x retval=%08x\n", |
| GetCurrentThreadId(), SELECTOROF(NtCurrentTeb()->WOW32Reserved), |
| OFFSETOF(NtCurrentTeb()->WOW32Reserved), ret); |
| SYSLEVEL_CheckNotLevel( 2 ); |
| } |
| } |
| |
| return TRUE; /* success */ |
| } |
| |
| /********************************************************************** |
| * K32WOWCallback16 (KERNEL32.54) |
| */ |
| DWORD WINAPI K32WOWCallback16( DWORD vpfn16, DWORD dwParam ) |
| { |
| DWORD ret; |
| |
| if ( !K32WOWCallback16Ex( vpfn16, WCB16_PASCAL, |
| sizeof(DWORD), &dwParam, &ret ) ) |
| ret = 0L; |
| |
| return ret; |
| } |
