MdeModulePkg/Core/DxeIplPeim/Ia32/IdtVectorAsm.nasm

   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