palacios/src/palacios/vmm_lowlevel.asm

   1 ; -*- fundamental -*-
   2 ;;  Northwestern University
   3 ;;  (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
   4
   5 %ifndef VMM_ASM
   6 %define VMM_ASM
   7
   8 %include "vmm_symbol.asm"
   9
  10 EXPORT DisableInts
  11 EXPORT EnableInts
  12
  13 EXPORT GetGDTR
  14 EXPORT GetIDTR
  15 EXPORT GetTR
  16
  17
  18
  19
  20
  21
  22 align 8
  23 DisableInts:
  24         cli
  25         ret
  26
  27
  28 align 8
  29 EnableInts:
  30         sti
  31         ret
  32
  33 align 8
  34 GetGDTR:
  35         push    ebp
  36         mov     ebp, esp
  37         pusha
  38         mov     ebx, [ebp + 8]
  39         sgdt    [ebx]
  40
  41         popa
  42         pop     ebp
  43         ret
  44
  45
  46 align 8
  47 GetIDTR:
  48         push    ebp
  49         mov     ebp, esp
  50         pusha
  51
  52         mov     ebx, [ebp + 8]
  53         sidt    [ebx]
  54
  55         popa
  56         pop     ebp
  57         ret
  58
  59
  60
  61 align 8
  62 GetTR:
  63         push    ebp
  64         mov     ebp, esp
  65         pusha
  66         mov     ebx, [ebp + 8]
  67         str     [ebx]
  68
  69         popa
  70         pop     ebp
  71         ret
  72
  73
  74
  75
  76
  77
  78
  79 %endif