PlDebugSupportIa32.c File Reference

#include "PlDebugSupport.h"

Go to the source code of this file.

Functions
UINTN	GetInterruptHandleFromIdt (IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDescriptor)
VOID	CreateEntryStub (IN EFI_EXCEPTION_TYPE ExceptionType, OUT VOID **Stub)
EFI_STATUS	ManageIdtEntryTable (CALLBACK_FUNC NewCallback, EFI_EXCEPTION_TYPE ExceptionType)

Variables
IA32_IDT_GATE_DESCRIPTOR	NullDesc

Detailed Description

IA32 specific functions to support Debug Support protocol.

Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file PlDebugSupportIa32.c.

Function Documentation

CreateEntryStub()

VOID CreateEntryStub	(	IN EFI_EXCEPTION_TYPE	ExceptionType,
		OUT VOID **	Stub
	)

Allocate pool for a new IDT entry stub.

Copy the generic stub into the new buffer and fixup the vector number and jump target address.

Parameters

ExceptionType	This is the exception type that the new stub will be created for.
Stub	On successful exit, *Stub contains the newly allocated entry stub.

Definition at line 52 of file PlDebugSupportIa32.c.

GetInterruptHandleFromIdt()

UINTN GetInterruptHandleFromIdt

(

IN IA32_IDT_GATE_DESCRIPTOR *

IdtGateDescriptor

)

Get Interrupt Handle from IDT Gate Descriptor.

Parameters

IdtGateDescriptor

IDT Gate Descriptor.

Returns

Interrupt Handle stored in IDT Gate Descriptor.

Definition at line 24 of file PlDebugSupportIa32.c.

ManageIdtEntryTable()

EFI_STATUS ManageIdtEntryTable	(	CALLBACK_FUNC	NewCallback,
		EFI_EXCEPTION_TYPE	ExceptionType
	)

This is the main worker function that manages the state of the interrupt handlers. It both installs and uninstalls interrupt handlers based on the value of NewCallback. If NewCallback is NULL, then uninstall is indicated. If NewCallback is non-NULL, then install is indicated.

Parameters

NewCallback	If non-NULL, NewCallback specifies the new handler to register. If NULL, specifies that the previously registered handler should be uninstalled.
ExceptionType	Indicates which entry to manage.

Return values

EFI_SUCCESS	Installing or Uninstalling operation is ok.
EFI_INVALID_PARAMETER	Requested uninstalling a handler from a vector that has no handler registered for it
EFI_ALREADY_STARTED	Requested install to a vector that already has a handler registered.

Definition at line 105 of file PlDebugSupportIa32.c.

Variable Documentation

NullDesc

IA32_IDT_GATE_DESCRIPTOR NullDesc

Initial value:

= {
  { 0 }
}

Definition at line 11 of file PlDebugSupportIa32.c.