DxeException.c

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#include <PiDxe.h>
#include "CpuExceptionCommon.h"
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
 
CONST UINTN  mDoFarReturnFlag = 0;
 
RESERVED_VECTORS_DATA      mReservedVectorsData[CPU_INTERRUPT_NUM];
EFI_CPU_INTERRUPT_HANDLER  mExternalInterruptHandlerTable[CPU_INTERRUPT_NUM];
EXCEPTION_HANDLER_DATA     mExceptionHandlerData = {
  CPU_INTERRUPT_NUM,
  0,                     // To be fixed
  mReservedVectorsData,
  mExternalInterruptHandlerTable
};
 
UINT8  mBuffer[CPU_STACK_SWITCH_EXCEPTION_NUMBER * CPU_KNOWN_GOOD_STACK_SIZE
               + CPU_TSS_GDT_SIZE];
 
VOID
EFIAPI
CommonExceptionHandler (
  IN EFI_EXCEPTION_TYPE  ExceptionType,
  IN EFI_SYSTEM_CONTEXT  SystemContext
  )
{
  CommonExceptionHandlerWorker (ExceptionType, SystemContext, &mExceptionHandlerData);
}
 
EFI_STATUS
EFIAPI
InitializeCpuExceptionHandlers (
  IN EFI_VECTOR_HANDOFF_INFO  *VectorInfo OPTIONAL
  )
{
  InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);
  return InitializeCpuExceptionHandlersWorker (VectorInfo, &mExceptionHandlerData);
}
 
EFI_STATUS
EFIAPI
RegisterCpuInterruptHandler (
  IN EFI_EXCEPTION_TYPE         InterruptType,
  IN EFI_CPU_INTERRUPT_HANDLER  InterruptHandler
  )
{
  return RegisterCpuInterruptHandlerWorker (InterruptType, InterruptHandler, &mExceptionHandlerData);
}
 
EFI_STATUS
EFIAPI
InitializeSeparateExceptionStacks (
  IN     VOID   *Buffer,
  IN OUT UINTN  *BufferSize
  )
{
  UINTN       LocalBufferSize;
  EFI_STATUS  Status;
 
  if ((Buffer == NULL) && (BufferSize == NULL)) {
    SetMem (mBuffer, sizeof (mBuffer), 0);
    LocalBufferSize = sizeof (mBuffer);
    Status          = ArchSetupExceptionStack (mBuffer, &LocalBufferSize);
    ASSERT_EFI_ERROR (Status);
    return Status;
  } else {
    return ArchSetupExceptionStack (Buffer, BufferSize);
  }
}