/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2010 Free Software Foundation, Inc. * * GRUB 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 3 of the License, or * (at your option) any later version. * * GRUB 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 GRUB. If not, see . */ #define SYSCALL_WRITE 4 #define SYSCALL_RESET 88 #define SYSCALL_EXIT 1 #define SYSCALL_INT 0x80 #define STDOUT 1 #define SHUTDOWN_MAGIC1 0xfee1dead #define SHUTDOWN_MAGIC2 0x28121969 #define SHUTDOWN_MAGIC3 0x4321fedc .text .global start, _start _start: start: /* write. */ movl $SYSCALL_WRITE, %eax movl $STDOUT, %ebx leal message, %ecx movl $(messageend-message), %edx int $SYSCALL_INT /* shutdown. */ movl $SYSCALL_RESET, %eax movl $SHUTDOWN_MAGIC1, %ebx movl $SHUTDOWN_MAGIC2, %ecx movl $SHUTDOWN_MAGIC3, %edx int $SYSCALL_INT /* exit (1). Shouldn't be reached. */ movl $SYSCALL_EXIT, %eax movl $1, %ebx int $SYSCALL_INT .data message: .ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n" messageend: