90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/rtl/exsup.cc
|
|
* DESCRIPTION: Exception handling
|
|
* DEVELOPERS: Aiken Harris <harraiken91@gmail.com>
|
|
*/
|
|
|
|
#include <xtos.hh>
|
|
|
|
|
|
/**
|
|
* Raises a structured exception using an exception record.
|
|
*
|
|
* @param ExceptionRecord
|
|
* Supplies a pointer to the exception record containing details.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
RTL::Exception::RaiseException(IN PEXCEPTION_RECORD ExceptionRecord)
|
|
{
|
|
/* Not implemented */
|
|
UNIMPLEMENTED;
|
|
|
|
/* Disable interrupts */
|
|
AR::CpuFunctions::ClearInterruptFlag();
|
|
|
|
/* Halt the system */
|
|
KE::Crash::Panic(ExceptionRecord->ExceptionCode);
|
|
}
|
|
|
|
/**
|
|
* Raises a structured exception based on the provided status code.
|
|
*
|
|
* @param Status
|
|
* Supplies the status code to be raised as an exception.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
RTL::Exception::RaiseStatus(IN XTSTATUS Status)
|
|
{
|
|
EXCEPTION_RECORD ExceptionRecord;
|
|
|
|
/* Not implemented */
|
|
UNIMPLEMENTED;
|
|
|
|
/* Create a basic exception record */
|
|
ExceptionRecord.ExceptionAddress = _ReturnAddress();
|
|
ExceptionRecord.ExceptionCode = Status;
|
|
ExceptionRecord.ExceptionRecord = NULLPTR;
|
|
ExceptionRecord.NumberParameters = 0;
|
|
ExceptionRecord.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
|
|
|
|
/* Dispatch the exception */
|
|
RaiseException(&ExceptionRecord);
|
|
}
|
|
|
|
/**
|
|
* Determines whether a SEH exception should be handled or lead to a kernel panic based on the processor mode.
|
|
*
|
|
* @return This routine returns EXCEPTION_EXECUTE_HANDLER if the CPU was in UserMode,
|
|
* or EXCEPTION_CONTINUE_SEARCH if the CPU was in KernelMode.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
LONG
|
|
RTL::Exception::SystemFilter(VOID)
|
|
{
|
|
/* Check if the exception originated from kernel-mode execution */
|
|
if(KE::Processor::GetCurrentThread()->PreviousMode == KernelMode)
|
|
{
|
|
/* Kernel-mode fault, force a kernel panic */
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
else
|
|
{
|
|
/* User-mode fault, catch it and return the error status gracefully */
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
}
|