1*ca987d46SWarner Losh/*- 2*ca987d46SWarner Losh * Copyright (c) 2014 Roger Pau Monné <royger@FreeBSD.org> 3*ca987d46SWarner Losh * All rights reserved. 4*ca987d46SWarner Losh * 5*ca987d46SWarner Losh * Redistribution and use in source and binary forms, with or without 6*ca987d46SWarner Losh * modification, are permitted provided that the following conditions 7*ca987d46SWarner Losh * are met: 8*ca987d46SWarner Losh * 1. Redistributions of source code must retain the above copyright 9*ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer. 10*ca987d46SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright 11*ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer in the 12*ca987d46SWarner Losh * documentation and/or other materials provided with the distribution. 13*ca987d46SWarner Losh * 14*ca987d46SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*ca987d46SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*ca987d46SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*ca987d46SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*ca987d46SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*ca987d46SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*ca987d46SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*ca987d46SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*ca987d46SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*ca987d46SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*ca987d46SWarner Losh * SUCH DAMAGE. 25*ca987d46SWarner Losh */ 26*ca987d46SWarner Losh 27*ca987d46SWarner Losh#define ASM_FILE 28*ca987d46SWarner Losh#include "multiboot.h" 29*ca987d46SWarner Losh 30*ca987d46SWarner Losh/* 31*ca987d46SWarner Losh * The multiboot specification requires the executable to be launched 32*ca987d46SWarner Losh * with %cs set to a flat read/execute segment with offset 0 and limit 33*ca987d46SWarner Losh * 0xFFFFFFFF, and the rest of the segment registers (%ds, %es, %fs, 34*ca987d46SWarner Losh * %gs, %ss) to flat read/write segments with the same offset and limit. 35*ca987d46SWarner Losh * This is already done by the BTX code before calling multiboot_tramp, 36*ca987d46SWarner Losh * so there is no need to do anything here. 37*ca987d46SWarner Losh */ 38*ca987d46SWarner Losh 39*ca987d46SWarner Losh .globl multiboot_tramp 40*ca987d46SWarner Loshmultiboot_tramp: 41*ca987d46SWarner Losh /* Be sure that interrupts are disabled. */ 42*ca987d46SWarner Losh cli 43*ca987d46SWarner Losh 44*ca987d46SWarner Losh movl $MULTIBOOT_BOOTLOADER_MAGIC, %eax 45*ca987d46SWarner Losh /* Get the entry point and address of the multiboot_info parameter. */ 46*ca987d46SWarner Losh movl 8(%esp), %ebx 47*ca987d46SWarner Losh movl 4(%esp), %ecx 48*ca987d46SWarner Losh 49*ca987d46SWarner Losh call *%ecx 50