/*- * Copyright (c) 2014 Roger Pau Monné <royger@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #define ASM_FILE #include "multiboot.h" /* * The multiboot specification requires the executable to be launched * with %cs set to a flat read/execute segment with offset 0 and limit * 0xFFFFFFFF, and the rest of the segment registers (%ds, %es, %fs, * %gs, %ss) to flat read/write segments with the same offset and limit. * This is already done by the BTX code before calling multiboot_tramp, * so there is no need to do anything here. */ .globl multiboot_tramp multiboot_tramp: /* Be sure that interrupts are disabled. */ cli movl $MULTIBOOT_BOOTLOADER_MAGIC, %eax /* Get the entry point and address of the multiboot_info parameter. */ movl 8(%esp), %ebx movl 4(%esp), %ecx call *%ecx |