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 ;  SPDX-License-Identifier: BSD-2-Clause-Patent
   7 ;
   8 ;**/
   9
  10     SECTION .text
  11
  12 ;
  13 ;------------------------------------------------------------------------------
  14 ;  Generic IDT Vector Handlers for the Host.
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18 ALIGN   8
  19 global ASM_PFX(AsmGetVectorTemplatInfo)
  20 global ASM_PFX(AsmVectorFixup)
  21
  22 @VectorTemplateBase:
  23         push  eax
  24         db    0x6a       ; push #VectorNumber
  25 @VectorNum:
  26         db    0
  27         mov   eax, CommonInterruptEntry
  28         jmp   eax
  29 @VectorTemplateEnd:
  30
  31 global ASM_PFX(AsmGetVectorTemplatInfo)
  32 ASM_PFX(AsmGetVectorTemplatInfo):
  33         mov   ecx, [esp + 4]
  34         mov   dword [ecx], @VectorTemplateBase
  35         mov   eax, (@VectorTemplateEnd - @VectorTemplateBase)
  36         ret
  37
  38 global ASM_PFX(AsmVectorFixup)
  39 ASM_PFX(AsmVectorFixup):
  40         mov   eax, dword [esp + 8]
  41         mov   ecx, [esp + 4]
  42         mov   [ecx + (@VectorNum - @VectorTemplateBase)], al
  43         ret
  44
  45 ;---------------------------------------;
  46 ; CommonInterruptEntry                  ;
  47 ;---------------------------------------;
  48 ; The follow algorithm is used for the common interrupt routine.
  49
  50 ;
  51 ; +---------------------+ <-- 16-byte aligned ensured by processor
  52 ; +    Old SS           +
  53 ; +---------------------+
  54 ; +    Old RSP          +
  55 ; +---------------------+
  56 ; +    RFlags           +
  57 ; +---------------------+
  58 ; +    CS               +
  59 ; +---------------------+
  60 ; +    RIP              +
  61 ; +---------------------+
  62 ; +    Error Code       +
  63 ; +---------------------+
  64 ; +    Vector Number    +
  65 ; +---------------------+
  66
  67 CommonInterruptEntry:
  68   cli
  69
  70   jmp $
  71