1199767f8SToomas Soome/*- 2199767f8SToomas Soome * Copyright (c) 2013 The FreeBSD Foundation 3199767f8SToomas Soome * All rights reserved. 4199767f8SToomas Soome * 5199767f8SToomas Soome * This software was developed by Benno Rice under sponsorship from 6199767f8SToomas Soome * the FreeBSD Foundation. 7199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without 8199767f8SToomas Soome * modification, are permitted provided that the following conditions 9199767f8SToomas Soome * are met: 10199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright 11199767f8SToomas Soome * notice, this list of conditions and the following disclaimer. 12199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 13199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the 14199767f8SToomas Soome * documentation and/or other materials provided with the distribution. 15199767f8SToomas Soome * 16199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26199767f8SToomas Soome * SUCH DAMAGE. 27199767f8SToomas Soome * 28199767f8SToomas Soome * $FreeBSD$ 29199767f8SToomas Soome */ 30199767f8SToomas Soome 31199767f8SToomas Soome#include <machine/asmacros.h> 32199767f8SToomas Soome 33199767f8SToomas Soome .text 34199767f8SToomas Soome .globl amd64_tramp 35199767f8SToomas Soome 36199767f8SToomas Soome/* 37199767f8SToomas Soome * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, 38199767f8SToomas Soome * uint64_t modulep, uint64_t pagetable, uint64_t entry) 39199767f8SToomas Soome */ 40199767f8SToomas Soomeamd64_tramp: 41199767f8SToomas Soome cli /* Make sure we don't get interrupted. */ 42199767f8SToomas Soome movq %rdi,%rsp /* Switch to our temporary stack. */ 43199767f8SToomas Soome 44199767f8SToomas Soome movq %rdx,%r12 /* Stash the kernel values for later. */ 45199767f8SToomas Soome movq %rcx,%r13 46199767f8SToomas Soome movq %r8,%r14 47199767f8SToomas Soome movq %r9,%r15 48199767f8SToomas Soome 49199767f8SToomas Soome callq *%rsi /* Call copy_finish so we're all ready to go. */ 50199767f8SToomas Soome 51199767f8SToomas Soome pushq %r12 /* Push kernend. */ 52199767f8SToomas Soome salq $32,%r13 /* Shift modulep and push it. */ 53199767f8SToomas Soome pushq %r13 54199767f8SToomas Soome pushq %r15 /* Push the entry address. */ 55199767f8SToomas Soome movq %r14,%cr3 /* Switch page tables. */ 56199767f8SToomas Soome ret /* "Return" to kernel entry. */ 57199767f8SToomas Soome 58199767f8SToomas Soome ALIGN_TEXT 59199767f8SToomas Soomeamd64_tramp_end: 60199767f8SToomas Soome 61199767f8SToomas Soome .data 62199767f8SToomas Soome .globl amd64_tramp_size 63199767f8SToomas Soomeamd64_tramp_size: 64199767f8SToomas Soome .long amd64_tramp_end-amd64_tramp 65