mirror of
https://github.com/ApfelTeeSaft/reactos.git
synced 2026-08-29 19:26:33 +00:00
134 lines
2.5 KiB
C
134 lines
2.5 KiB
C
/*++
|
|
|
|
Copyright (c) 1998-2001 Klaus P. Gerlicher
|
|
|
|
Module Name:
|
|
|
|
dblflt.c
|
|
|
|
Abstract:
|
|
|
|
handle double faults on x86
|
|
|
|
Environment:
|
|
|
|
LINUX 2.2.X
|
|
Kernel mode only
|
|
|
|
Author:
|
|
|
|
Klaus P. Gerlicher
|
|
|
|
Revision History:
|
|
|
|
13-Nov-1999: created
|
|
15-Nov-2000: general cleanup of source files
|
|
|
|
Copyright notice:
|
|
|
|
This file may be distributed under the terms of the GNU Public License.
|
|
|
|
--*/
|
|
|
|
////////////////////////////////////////////////////
|
|
// INCLUDES
|
|
////
|
|
#include "remods.h"
|
|
#include "precomp.h"
|
|
|
|
////////////////////////////////////////////////////
|
|
// GLOBALS
|
|
////
|
|
ULONG OldDblFltHandler = 0;
|
|
|
|
////////////////////////////////////////////////////
|
|
// FUNCTIONS
|
|
////
|
|
|
|
//*************************************************************************
|
|
// HandleDoubleFault()
|
|
//
|
|
//*************************************************************************
|
|
void HandleDoubleFault(FRAME* ptr)
|
|
{
|
|
DPRINT((0,"HandleDoubleFault(): ptr = %x\n",ptr));
|
|
}
|
|
|
|
|
|
//*************************************************************************
|
|
// NewDblFltHandler()
|
|
//
|
|
//*************************************************************************
|
|
__asm__ ("
|
|
NewDblFltHandler:
|
|
pushfl
|
|
cli
|
|
cld
|
|
pushal
|
|
pushl %ds
|
|
|
|
// setup default data selectors
|
|
movw %ss,%ax
|
|
movw %ax,%ds
|
|
|
|
// get frame ptr
|
|
lea 40(%esp),%eax
|
|
pushl %eax
|
|
call HandleDoubleFault
|
|
addl $4,%esp
|
|
|
|
popl %ds
|
|
popal
|
|
popfl
|
|
// remove error code from stack and replace with reason code
|
|
movl $" STR(REASON_DOUBLE_FAULT) ",(%esp)
|
|
// call debugger loop
|
|
jmp NewInt31Handler");
|
|
|
|
|
|
//*************************************************************************
|
|
// InstallDblFltHook()
|
|
//
|
|
//*************************************************************************
|
|
void InstallDblFltHook(void)
|
|
{
|
|
ULONG LocalDblFltHandler;
|
|
|
|
ENTER_FUNC();
|
|
|
|
MaskIrqs();
|
|
if(!OldDblFltHandler)
|
|
{
|
|
__asm__("mov $NewDblFltHandler,%0"
|
|
:"=r" (LocalDblFltHandler)
|
|
:
|
|
:"eax");
|
|
OldDblFltHandler=SetGlobalInt(0x08,(ULONG)LocalDblFltHandler);
|
|
}
|
|
UnmaskIrqs();
|
|
|
|
LEAVE_FUNC();
|
|
}
|
|
|
|
//*************************************************************************
|
|
// DeInstallDblFltHook()
|
|
//
|
|
//*************************************************************************
|
|
void DeInstallDblFltHook(void)
|
|
{
|
|
ENTER_FUNC();
|
|
|
|
MaskIrqs();
|
|
if(OldDblFltHandler)
|
|
{
|
|
RemoveAllSWBreakpoints(TRUE);
|
|
SetGlobalInt(0x08,(ULONG)OldDblFltHandler);
|
|
OldDblFltHandler=0;
|
|
}
|
|
UnmaskIrqs();
|
|
|
|
LEAVE_FUNC();
|
|
}
|
|
|
|
// EOF
|