audk/UefiCpuPkg/CpuDxe/Ia32/IvtAsm.asm

52 lines
1.5 KiB
NASM
Executable File

TITLE IvtAsm.asm:
;------------------------------------------------------------------------------
;*
;* Copyright 2008 - 2009, Intel Corporation
;* All rights reserved. This program and the accompanying materials
;* are licensed and made available under the terms and conditions of the BSD License
;* which accompanies this distribution. The full text of the license may be found at
;* http://opensource.org/licenses/bsd-license.php
;*
;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;*
;* IvtAsm.asm
;*
;* Abstract:
;*
;------------------------------------------------------------------------------
#include <Base.h>
#ifdef MDE_CPU_IA32
.686
.model flat,C
#endif
.code
;------------------------------------------------------------------------------
; Generic IDT Vector Handlers for the Host. They are all the same so they
; will compress really well.
;
; By knowing the return address for Vector 00 you can can calculate the
; vector number by looking at the call CommonInterruptEntry return address.
; (return address - (AsmIdtVector00 + 5))/8 == IDT index
;
;------------------------------------------------------------------------------
EXTRN CommonInterruptEntry:PROC
ALIGN 8
PUBLIC AsmIdtVector00
AsmIdtVector00 LABEL BYTE
REPEAT 256
call CommonInterruptEntry
dw ($ - AsmIdtVector00 - 5) / 8 ; vector number
nop
ENDM
END