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      1 #/** @file
      2 #
      3 #    IDT vector entry.
      4 #
      5 #  Copyright (c) 2007 - 2009, Intel Corporation. All rights reserved.<BR>
      6 #  This program and the accompanying materials
      7 #  are licensed and made available under the terms and conditions of the BSD License
      8 #  which accompanies this distribution.  The full text of the license may be found at
      9 #  http://opensource.org/licenses/bsd-license.php
     10 #
     11 #  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     12 #  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     13 #
     14 #**/
     15 
     16     .text
     17     .code32
     18 
     19 
     20     .p2align 3
     21     ASM_GLOBAL  ASM_PFX(AsmGetVectorTemplatInfo)
     22     ASM_GLOBAL 	ASM_PFX(AsmVectorFixup)
     23 /*
     24 ;
     25 ;-----------------------------------------------------------------------
     26 ;  Template of IDT Vector Handlers.
     27 ;
     28 ;-----------------------------------------------------------------------
     29 */
     30 VectorTemplateBase:
     31         pushl %eax
     32         .byte 0x6a    #  push #VectorNum
     33 VectorNum:
     34         .byte 0
     35         movl  CommonInterruptEntry, %eax
     36         jmp   *%eax
     37 VectorTemplateEnd:
     38 
     39 
     40 ASM_PFX(AsmGetVectorTemplatInfo):
     41         movl  4(%esp), %ecx
     42         movl  $VectorTemplateBase, (%ecx)
     43         movl  $(VectorTemplateEnd - VectorTemplateBase), %eax
     44         ret
     45 
     46 ASM_PFX(AsmVectorFixup):
     47         movl  8(%esp), %eax
     48         movl  4(%esp), %ecx
     49         movb  %al, (VectorNum - VectorTemplateBase)(%ecx)
     50         ret
     51 
     52 /*
     53 ; The follow algorithm is used for the common interrupt routine.
     54 
     55 ;
     56 ; +---------------------+ <-- 16-byte aligned ensured by processor
     57 ; +    Old SS           +
     58 ; +---------------------+
     59 ; +    Old RSP          +
     60 ; +---------------------+
     61 ; +    RFlags           +
     62 ; +---------------------+
     63 ; +    CS               +
     64 ; +---------------------+
     65 ; +    RIP              +
     66 ; +---------------------+
     67 ; +    Error Code       +
     68 ; +---------------------+
     69 ; +    Vector Number    +
     70 ; +---------------------+
     71 */
     72 
     73 CommonInterruptEntry:
     74         cli
     75 1:
     76         jmp   1b
     77 
     78 
     79 
     80 
     81