1*479ab7f0SSascha Wildner/*- 2*479ab7f0SSascha Wildner * Copyright (c) 2013 The FreeBSD Foundation 3*479ab7f0SSascha Wildner * All rights reserved. 4*479ab7f0SSascha Wildner * 5*479ab7f0SSascha Wildner * This software was developed by Benno Rice under sponsorship from 6*479ab7f0SSascha Wildner * the FreeBSD Foundation. 7*479ab7f0SSascha Wildner * Redistribution and use in source and binary forms, with or without 8*479ab7f0SSascha Wildner * modification, are permitted provided that the following conditions 9*479ab7f0SSascha Wildner * are met: 10*479ab7f0SSascha Wildner * 1. Redistributions of source code must retain the above copyright 11*479ab7f0SSascha Wildner * notice, this list of conditions and the following disclaimer. 12*479ab7f0SSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright 13*479ab7f0SSascha Wildner * notice, this list of conditions and the following disclaimer in the 14*479ab7f0SSascha Wildner * documentation and/or other materials provided with the distribution. 15*479ab7f0SSascha Wildner * 16*479ab7f0SSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*479ab7f0SSascha Wildner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*479ab7f0SSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*479ab7f0SSascha Wildner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*479ab7f0SSascha Wildner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*479ab7f0SSascha Wildner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*479ab7f0SSascha Wildner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*479ab7f0SSascha Wildner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*479ab7f0SSascha Wildner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*479ab7f0SSascha Wildner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*479ab7f0SSascha Wildner * SUCH DAMAGE. 27*479ab7f0SSascha Wildner * 28*479ab7f0SSascha Wildner * $FreeBSD: head/sys/boot/efi/loader/arch/amd64/amd64_tramp.S 280950 2015-04-01 08:30:40Z andrew $ 29*479ab7f0SSascha Wildner */ 30*479ab7f0SSascha Wildner 31*479ab7f0SSascha Wildner#include <machine/asmacros.h> 32*479ab7f0SSascha Wildner 33*479ab7f0SSascha Wildner .text 34*479ab7f0SSascha Wildner .globl amd64_tramp 35*479ab7f0SSascha Wildner 36*479ab7f0SSascha Wildner/* 37*479ab7f0SSascha Wildner * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, 38*479ab7f0SSascha Wildner * uint64_t modulep, uint64_t pagetable, uint64_t entry) 39*479ab7f0SSascha Wildner */ 40*479ab7f0SSascha Wildneramd64_tramp: 41*479ab7f0SSascha Wildner cli /* Make sure we don't get interrupted. */ 42*479ab7f0SSascha Wildner movq %rdi,%rsp /* Switch to our temporary stack. */ 43*479ab7f0SSascha Wildner 44*479ab7f0SSascha Wildner movq %rdx,%r12 /* Stash the kernel values for later. */ 45*479ab7f0SSascha Wildner movq %rcx,%r13 46*479ab7f0SSascha Wildner movq %r8,%r14 47*479ab7f0SSascha Wildner movq %r9,%r15 48*479ab7f0SSascha Wildner 49*479ab7f0SSascha Wildner callq *%rsi /* Call copy_finish so we're all ready to go. */ 50*479ab7f0SSascha Wildner 51*479ab7f0SSascha Wildner pushq %r12 /* Push kernend. */ 52*479ab7f0SSascha Wildner salq $32,%r13 /* Shift modulep and push it. */ 53*479ab7f0SSascha Wildner pushq %r13 54*479ab7f0SSascha Wildner pushq %r15 /* Push the entry address. */ 55*479ab7f0SSascha Wildner movq %r14,%cr3 /* Switch page tables. */ 56*479ab7f0SSascha Wildner ret /* "Return" to kernel entry. */ 57*479ab7f0SSascha Wildner 58*479ab7f0SSascha Wildner ALIGN_TEXT 59*479ab7f0SSascha Wildneramd64_tramp_end: 60*479ab7f0SSascha Wildner 61*479ab7f0SSascha Wildner .data 62*479ab7f0SSascha Wildner .globl amd64_tramp_size 63*479ab7f0SSascha Wildneramd64_tramp_size: 64*479ab7f0SSascha Wildner .long amd64_tramp_end-amd64_tramp 65