dblflt.c

Linux下的类似softice的调试工具

/******************************************************************************
 *
 * PROJECT: pICE
 * $Source: /cvsroot/pice/pice/module/dblflt.c,v $
 * $Revision: 1.5 $
 * $Date: 2004/02/17 23:07:36 $
 * $Author: lightweave $
 * $Name:  $
 *
 * $Log: dblflt.c,v $
 * Revision 1.5  2004/02/17 23:07:36  lightweave
 *
 * Improved the DEBUG facillity and replaced the configuration handler with a
 * new code which now can read MS Windows INI style files. See CHANGES.txt for
 * more details.
 * Also added a macro which prevents compiling for kernels before 2.4.19.
 *
 * Revision 1.4  2003/06/18 22:00:22  lightweave
 * DEBUG and DEBUG_SERIAL added
 *
 *
 *****************************************************************************/

static char *ident = "$Header: /cvsroot/pice/pice/module/dblflt.c,v 1.5 2004/02/17 23:07:36 lightweave Exp $";


/*++

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 <asm/delay.h>

#include "precomp.h"

////////////////////////////////////////////////////
// DEFINES
////
#define DOUBLE_FAULT_VECTOR (0x08)

////////////////////////////////////////////////////
// GLOBALS
////
ULONG OldDblFltHandler = 0;

////////////////////////////////////////////////////
// FUNCTIONS
////

//************************************************************************* 
// HandleDoubleFault() 
// 
//************************************************************************* 
void HandleDoubleFault(EXCEPTION_FRAME *ptr)
{
   DPRINT(PICE_DEBUG, DBT_BP, DBL_INFO, "HandleDoubleFault(): ptr = %8p [EMPTY FUNCTION]\n", ptr);
}

//************************************************************************* 
// InstallDblFltHook() 
// 
//************************************************************************* 
void InstallDblFltHook(void)
{
#ifdef ACTIVATE_DOUBLEFAULT_HOOK       
	void DebuggerDoubleFault(void);

	ENTER_FUNC();

	if(!OldDblFltHandler)
	{
		HookInterruptVector(DOUBLE_FAULT_VECTOR,(PVOID)&DebuggerDoubleFault,(PVOID)&OldDblFltHandler);
	}

    LEAVE_FUNC();
#endif // ACTIVATE_DOUBLEFAULT_HOOK       
}

//************************************************************************* 
// DeInstallDblFltHook() 
// 
//************************************************************************* 
void DeInstallDblFltHook(void)
{
#ifdef ACTIVATE_DOUBLEFAULT_HOOK       
	ENTER_FUNC();

	if(OldDblFltHandler)
	{
		HookInterruptVector(DOUBLE_FAULT_VECTOR,(PVOID)OldDblFltHandler,NULL);
	}

    LEAVE_FUNC();
#endif // ACTIVATE_DOUBLEFAULT_HOOK       
}

// EOF