/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2000 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ .file "pxeloader.S" .text /* Start with the prehistoric environment... */ .code16 /* Let's go */ .globl _start; _start: movw %sp, %bp movw %ss:4(%bp), %ax pushw %ax movw %ss:6(%bp), %ax pushw %ax call 1f 1: popw %bx /* Save !PXE address */ popw %ax movw %ax, %cs:(pxeseg-1b)(%bx) popw %ax movw %ax, %cs:(pxeoff-1b)(%bx) movw %ax, %bx /* Jump to the real world */ ljmp $0, $0x8200 . = _start + 0x7C80 - 0x7C00 pxeseg: .word 0 pxeoff: .word 0 /* This region is a junk. Do you say that this is wasteful? But I like that the memory layout of the body is consistent among different stage2s rather than scamping just for 1.5KB. */ . = _start + 0x8200 - 0x7C00 - 1 .byte 0