/* * __boot.S - kernel multiboot header * * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless * Copyright (c) 2011,2012 UPMC Sorbonne Universites * * This file is part of ALMOS-kernel. * * ALMOS-kernel 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; version 2.0 of the License. * * ALMOS-kernel 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 ALMOS-kernel; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ .section .boot,"ax",@progbits .global _start, start .extern kboot_entry #define MULTIBOOT_HEADER_MAGIC 0x1BADB002 #define MULTIBOOT_HEADER_FLAGS 0x00000003 #define CHECKSUM -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) _start: jmp start /* -------- The Multiboot header -------- */ .align 4 multiboot_header: .int MULTIBOOT_HEADER_MAGIC .int MULTIBOOT_HEADER_FLAGS .int CHECKSUM /* ----- Multiboot Header Ends Here ----- */ .extern tempGdt .extern sys_stack start: pushl %ebx call kboot_entry cli hlt .section .bss .global __boot_stack .space 4096 __boot_stack: