sys/boot/pc32/libi386/pxetramp.s

   1 #
   2 # Copyright (c) 2000 Peter Wemm
   3 # All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms are freely
   6 # permitted provided that the above copyright notice and this
   7 # paragraph and the following disclaimer are duplicated in all
   8 # such forms.
   9 #
  10 # This software is provided "AS IS" and without any express or
  11 # implied warranties, including, without limitation, the implied
  12 # warranties of merchantability and fitness for a particular
  13 # purpose.
  14 #
  15 # $FreeBSD: src/sys/boot/i386/libi386/pxetramp.s,v 1.3 2001/10/04 10:18:00 jhb Exp $
  16 # $DragonFly: src/sys/boot/pc32/libi386/pxetramp.s,v 1.3 2003/11/10 06:08:36 dillon Exp $
  17
  18 # ph33r this
  19
  20                 .globl  __bangpxeentry, __bangpxeseg, __bangpxeoff
  21                 .globl  __pxenventry, __pxenvseg, __pxenvoff
  22
  23                 .code16
  24                 .p2align 4,0x90
  25 __bangpxeentry:
  26                 push    %dx                     # seg:data
  27                 push    %ax                     # off:data
  28                 push    %bx                     # int16 func
  29                 .byte   0x9a                    # far call
  30 __bangpxeoff:   .word   0x0000                  # offset
  31 __bangpxeseg:   .word   0x0000                  # segment
  32                 add     $6, %sp                 # restore stack
  33                 .byte   0xcb                    # to vm86int
  34 #
  35 __pxenventry:
  36                 .byte   0x9a                    # far call
  37 __pxenvoff:     .word   0x0000                  # offset
  38 __pxenvseg:     .word   0x0000                  # segment
  39                 .byte   0xcb                    # to vm86int