mirror of
https://github.com/reactos/reactos.git
synced 2024-11-02 12:53:33 +00:00
111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
|
/*
|
||
|
|
* ReactOS kernel
|
||
|
|
* Copyright (C) 2000 David Welch <welch@cwcom.net>
|
||
|
|
*
|
||
|
|
* Moved to MSVC-compatible inline assembler by Mike Nordell, 2003-12-26
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program 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 General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* FILE: ntoskrnl/ke/i386/vm86_sup.S
|
||
|
|
* PURPOSE: V86 mode support
|
||
|
|
* PROGRAMMER: David Welch (welch@cwcom.net)
|
||
|
|
* UPDATE HISTORY:
|
||
|
|
* Created 09/10/00
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* INCLUDES ******************************************************************/
|
||
|
|
|
||
|
|
#pragma hdrstop
|
||
|
|
|
||
|
|
#include <ddk/ntddk.h>
|
||
|
|
#include <ddk/status.h>
|
||
|
|
#include <internal/i386/segment.h>
|
||
|
|
#include <internal/i386/fpu.h>
|
||
|
|
#include <internal/ps.h>
|
||
|
|
#include <ddk/defines.h>
|
||
|
|
#include <internal/v86m.h>
|
||
|
|
#include <ntos/tss.h>
|
||
|
|
//#include <ntos/service.h>
|
||
|
|
#include <internal/trap.h>
|
||
|
|
#include <internal/ps.h>
|
||
|
|
|
||
|
|
#include <roscfg.h>
|
||
|
|
#include <internal/ntoskrnl.h>
|
||
|
|
#include <internal/i386/segment.h>
|
||
|
|
|
||
|
|
|
||
|
|
void KeReturnFromSystemCall();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FUNCTION: KeStackSwitchAndRet
|
||
|
|
* PURPOSE: Switch to a new stack and return from the first frame on
|
||
|
|
* the new stack which was assumed to a stdcall function with
|
||
|
|
* 8 bytes of arguments and which saved edi, esi and ebx.
|
||
|
|
*/
|
||
|
|
__declspec(naked)
|
||
|
|
VOID STDCALL
|
||
|
|
KeStackSwitchAndRet(PVOID NewStack)
|
||
|
|
{
|
||
|
|
__asm
|
||
|
|
{
|
||
|
|
push ebp
|
||
|
|
mov ebp, esp
|
||
|
|
|
||
|
|
cli
|
||
|
|
|
||
|
|
mov esp, NewStack
|
||
|
|
|
||
|
|
sti
|
||
|
|
|
||
|
|
pop edi
|
||
|
|
pop esi
|
||
|
|
pop ebx
|
||
|
|
|
||
|
|
pop ebp
|
||
|
|
ret 8
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
__declspec(naked)
|
||
|
|
VOID STDCALL
|
||
|
|
KePushAndStackSwitchAndSysRet(ULONG Push, PVOID NewStack)
|
||
|
|
{
|
||
|
|
__asm
|
||
|
|
{
|
||
|
|
push ebp
|
||
|
|
mov ebp, esp
|
||
|
|
|
||
|
|
push ebx
|
||
|
|
push esi
|
||
|
|
push edi
|
||
|
|
|
||
|
|
cli
|
||
|
|
|
||
|
|
push 8[ebp]
|
||
|
|
|
||
|
|
mov ebx, fs:KPCR_CURRENT_THREAD
|
||
|
|
mov KTHREAD_CALLBACK_STACK[ebx], esp
|
||
|
|
mov esp, 12[ebp]
|
||
|
|
|
||
|
|
sti
|
||
|
|
|
||
|
|
push 0
|
||
|
|
call KeLowerIrql
|
||
|
|
|
||
|
|
jmp KeReturnFromSystemCall
|
||
|
|
}
|
||
|
|
}
|