2010-01-19 08:17:23 +00:00
|
|
|
/*
|
|
|
|
|
* 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. */
|
|
|
|
|
movq $SYSCALL_MOUNT, %rax
|
|
|
|
|
movq $devfstype, %rdi
|
|
|
|
|
movq $devfsdir, %rsi
|
|
|
|
|
movq $0, %rdx
|
|
|
|
|
movq $tmpfs_args, %r10
|
|
|
|
|
movq $(tmpfs_args_end - tmpfs_args), %r8
|
|
|
|
|
syscall
|
|
|
|
|
|
|
|
|
|
/* mknod. */
|
|
|
|
|
movq $SYSCALL_MKNOD, %rax
|
|
|
|
|
leaq device, %rdi
|
|
|
|
|
movq $0x2140, %rsi
|
|
|
|
|
movq $0, %rdx
|
|
|
|
|
syscall
|
|
|
|
|
|
|
|
|
|
/* open. */
|
|
|
|
|
movq $SYSCALL_OPEN, %rax
|
|
|
|
|
leaq device, %rdi
|
|
|
|
|
movq $MODE_RDRW, %rsi
|
|
|
|
|
movq $FLAGS_NONE, %rdx
|
|
|
|
|
syscall
|
|
|
|
|
movq %rax, %rdi
|
|
|
|
|
|
|
|
|
|
/* write. */
|
|
|
|
|
movq $SYSCALL_WRITE, %rax
|
|
|
|
|
movq $(messageend-message), %rdx
|
|
|
|
|
leaq message, %rsi
|
|
|
|
|
syscall
|
|
|
|
|
|
|
|
|
|
/* shutdown. */
|
|
|
|
|
movq $SYSCALL_RESET, %rax
|
|
|
|
|
movq $(RESET_POWEROFF|RESET_HALT|RESET_NOSYNC), %rdi
|
2010-01-20 10:12:45 +00:00
|
|
|
movq $0, %rsi
|
2010-01-19 08:17:23 +00:00
|
|
|
syscall
|
|
|
|
|
|
|
|
|
|
/* exit (1). Shouldn't be reached. */
|
|
|
|
|
movq $SYSCALL_EXIT, %rax
|
|
|
|
|
movq $1, %rdi
|
|
|
|
|
syscall
|
|
|
|
|
.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:
|
|
|
|
|
devfstype:
|
|
|
|
|
.ascii "tmpfs"
|
|
|
|
|
.byte 0
|
|
|
|
|
devfsdir:
|
|
|
|
|
.ascii "/dev"
|
|
|
|
|
.byte 0
|
|
|
|
|
tmpfs_args:
|
|
|
|
|
/* Version. */
|
|
|
|
|
.long 1
|
|
|
|
|
|
|
|
|
|
/* Alignment long. */
|
|
|
|
|
.long 0
|
|
|
|
|
|
|
|
|
|
/* Maximum inodes. */
|
|
|
|
|
.quad 0
|
|
|
|
|
/* Maximum size. */
|
|
|
|
|
.quad 0
|
|
|
|
|
|
|
|
|
|
/* UID */
|
|
|
|
|
.long 0
|
|
|
|
|
/* GID */
|
|
|
|
|
.long 0
|
|
|
|
|
/* Mode */
|
|
|
|
|
.long 0777
|
|
|
|
|
/* Alignment long. */
|
|
|
|
|
.long 0
|
|
|
|
|
tmpfs_args_end:
|
