reactos/msvc6/ntoskrnl/ke_i386_stkswitch.c

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/*
* 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
}
}