79 lines
1.8 KiB
ArmAsm
79 lines
1.8 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define SYSCALL_WRITE 4
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#define SYSCALL_RESET 88
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#define SYSCALL_IOPL 110
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#define SYSCALL_EXIT 1
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#define SYSCALL_INT 0x80
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#define STDOUT 1
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#define SHUTDOWN_MAGIC1 0xfee1dead
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#define SHUTDOWN_MAGIC2 0x28121969
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#define SHUTDOWN_MAGIC3 0x4321fedc
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#define SHUTDOWN_PORT 0x8900
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.text
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.global start, _start
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_start:
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start:
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/* write. */
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movl $SYSCALL_WRITE, %eax
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movl $STDOUT, %ebx
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leal message, %ecx
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movl $(messageend-message), %edx
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int $SYSCALL_INT
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movl $SYSCALL_IOPL, %eax
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movl $3, %ebx
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int $SYSCALL_INT
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movw $SHUTDOWN_PORT, %dx
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movb $'S', %al
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outb %al, %dx
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movb $'h', %al
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outb %al, %dx
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movb $'u', %al
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outb %al, %dx
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movb $'t', %al
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outb %al, %dx
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movb $'d', %al
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outb %al, %dx
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movb $'o', %al
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outb %al, %dx
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movb $'w', %al
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outb %al, %dx
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movb $'n', %al
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outb %al, %dx
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/* shutdown. */
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movl $SYSCALL_RESET, %eax
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movl $SHUTDOWN_MAGIC1, %ebx
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movl $SHUTDOWN_MAGIC2, %ecx
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movl $SHUTDOWN_MAGIC3, %edx
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int $SYSCALL_INT
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/* exit (1). Shouldn't be reached. */
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movl $SYSCALL_EXIT, %eax
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movl $1, %ebx
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int $SYSCALL_INT
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.data
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message:
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.ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n"
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messageend:
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