source: trunk/hal/i386/__boot.S @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * __boot.S - kernel multiboot header
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23.section .boot,"ax",@progbits
24.global _start, start
25.extern kboot_entry
26       
27#define MULTIBOOT_HEADER_MAGIC  0x1BADB002
28#define MULTIBOOT_HEADER_FLAGS  0x00000003
29#define CHECKSUM -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
30       
31_start:
32        jmp start
33
34/* -------- The Multiboot header -------- */
35.align 4
36multiboot_header:
37.int MULTIBOOT_HEADER_MAGIC
38.int MULTIBOOT_HEADER_FLAGS
39.int CHECKSUM     
40/* ----- Multiboot Header Ends Here ----- */
41.extern tempGdt
42.extern sys_stack
43start:
44        pushl   %ebx
45        call    kboot_entry
46        cli
47        hlt
48
49       
50.section .bss
51.global __boot_stack
52.space  4096
53__boot_stack:
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