134 lines
No EOL
2.6 KiB
ArmAsm
134 lines
No EOL
2.6 KiB
ArmAsm
/*
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define MODE_RDRW 2
|
|
#define FLAGS_NONE 0
|
|
#define SYSCALL_OPEN 5
|
|
#define SYSCALL_WRITE 4
|
|
#define SYSCALL_RESET 208
|
|
#define SYSCALL_EXIT 1
|
|
#define SYSCALL_MKNOD 14
|
|
#define SYSCALL_MOUNT 410
|
|
#define SYSCALL_INT 0x80
|
|
|
|
#define RESET_NOSYNC 0x4
|
|
#define RESET_HALT 0x8
|
|
#define RESET_POWEROFF 0x800
|
|
|
|
.section ".init", "ax"
|
|
.global start,_start
|
|
start:
|
|
_start:
|
|
/* mount. */
|
|
movl $SYSCALL_MOUNT, %eax
|
|
push $(tmpfs_args_end - tmpfs_args)
|
|
push $tmpfs_args
|
|
push $0
|
|
push $devfsdir
|
|
push $devfstype
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
addl $20, %esp
|
|
|
|
/* mknod. */
|
|
movl $SYSCALL_MKNOD, %eax
|
|
pushl $0
|
|
pushl $0x2140
|
|
leal device, %ebx
|
|
pushl %ebx
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
addl $16, %esp
|
|
|
|
/* open. */
|
|
movl $SYSCALL_OPEN, %eax
|
|
pushl $FLAGS_NONE
|
|
pushl $MODE_RDRW
|
|
leal device, %ebx
|
|
pushl %ebx
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
addl $16, %esp
|
|
movl %eax, %ecx
|
|
|
|
/* write. */
|
|
movl $SYSCALL_WRITE, %eax
|
|
pushl $(messageend-message)
|
|
leal message, %ebx
|
|
pushl %ebx
|
|
pushl %ecx
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
addl $16, %esp
|
|
|
|
/* shutdown. */
|
|
movl $SYSCALL_RESET, %eax
|
|
pushl $haltmsg
|
|
pushl $(RESET_POWEROFF|RESET_HALT|RESET_NOSYNC)
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
addl $8, %esp
|
|
|
|
/* exit (1). Shouldn't be reached. */
|
|
movl $SYSCALL_EXIT, %eax
|
|
pushl $1
|
|
pushl $0
|
|
int $SYSCALL_INT
|
|
.section ".fini", "ax"
|
|
1: jmp 1b
|
|
.section ".text", "ax"
|
|
1: jmp 1b
|
|
/* This section is needed for NetBSD to identify the binary. */
|
|
.section ".note.netbsd.ident", "a"
|
|
.long 0x7
|
|
.long 0x4
|
|
.long 0x1
|
|
.ascii "NetBSD"
|
|
.byte 0
|
|
.data
|
|
device:
|
|
.ascii "/dev/console"
|
|
.byte 0
|
|
message:
|
|
.ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n"
|
|
messageend:
|
|
haltmsg:
|
|
.ascii "Machine halted"
|
|
.byte 0
|
|
devfstype:
|
|
.ascii "tmpfs"
|
|
.byte 0
|
|
devfsdir:
|
|
.ascii "/dev"
|
|
.byte 0
|
|
tmpfs_args:
|
|
/* Version. */
|
|
.long 1
|
|
|
|
/* Maximum inodes. */
|
|
.quad 0
|
|
/* Maximum size. */
|
|
.quad 0
|
|
|
|
/* UID */
|
|
.long 0
|
|
/* GID */
|
|
.long 0
|
|
/* Mode */
|
|
.long 0777
|
|
tmpfs_args_end:
|