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      1 ;/** @file
      2 ;
      3 ;    IDT vector entry.
      4 ;
      5 ;  Copyright (c) 2007 - 2016, 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     SECTION .text
     17 
     18 ;
     19 ;------------------------------------------------------------------------------
     20 ;  Generic IDT Vector Handlers for the Host.
     21 ;
     22 ;------------------------------------------------------------------------------
     23 
     24 ALIGN   8
     25 global ASM_PFX(AsmGetVectorTemplatInfo)
     26 global ASM_PFX(AsmVectorFixup)
     27 
     28 @VectorTemplateBase:
     29         push  eax
     30         db    0x6a       ; push #VectorNumber
     31 @VectorNum:
     32         db    0
     33         mov   eax, CommonInterruptEntry
     34         jmp   eax
     35 @VectorTemplateEnd:
     36 
     37 global ASM_PFX(AsmGetVectorTemplatInfo)
     38 ASM_PFX(AsmGetVectorTemplatInfo):
     39         mov   ecx, [esp + 4]
     40         mov   dword [ecx], @VectorTemplateBase
     41         mov   eax, (@VectorTemplateEnd - @VectorTemplateBase)
     42         ret
     43 
     44 global ASM_PFX(AsmVectorFixup)
     45 ASM_PFX(AsmVectorFixup):
     46         mov   eax, dword [esp + 8]
     47         mov   ecx, [esp + 4]
     48         mov   [ecx + (@VectorNum - @VectorTemplateBase)], al
     49         ret
     50 
     51 ;---------------------------------------;
     52 ; CommonInterruptEntry                  ;
     53 ;---------------------------------------;
     54 ; The follow algorithm is used for the common interrupt routine.
     55 
     56 ;
     57 ; +---------------------+ <-- 16-byte aligned ensured by processor
     58 ; +    Old SS           +
     59 ; +---------------------+
     60 ; +    Old RSP          +
     61 ; +---------------------+
     62 ; +    RFlags           +
     63 ; +---------------------+
     64 ; +    CS               +
     65 ; +---------------------+
     66 ; +    RIP              +
     67 ; +---------------------+
     68 ; +    Error Code       +
     69 ; +---------------------+
     70 ; +    Vector Number    +
     71 ; +---------------------+
     72 
     73 CommonInterruptEntry:
     74   cli
     75 
     76   jmp $
     77 
     78