1*22028508SToomas Soome/*- 2*22028508SToomas Soome * Copyright (c) 2013 The FreeBSD Foundation 3*22028508SToomas Soome * All rights reserved. 4*22028508SToomas Soome * 5*22028508SToomas Soome * This software was developed by Benno Rice under sponsorship from 6*22028508SToomas Soome * the FreeBSD Foundation. 7*22028508SToomas Soome * Redistribution and use in source and binary forms, with or without 8*22028508SToomas Soome * modification, are permitted provided that the following conditions 9*22028508SToomas Soome * are met: 10*22028508SToomas Soome * 1. Redistributions of source code must retain the above copyright 11*22028508SToomas Soome * notice, this list of conditions and the following disclaimer. 12*22028508SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 13*22028508SToomas Soome * notice, this list of conditions and the following disclaimer in the 14*22028508SToomas Soome * documentation and/or other materials provided with the distribution. 15*22028508SToomas Soome * 16*22028508SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*22028508SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*22028508SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*22028508SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*22028508SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*22028508SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*22028508SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*22028508SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*22028508SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*22028508SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*22028508SToomas Soome * SUCH DAMAGE. 27*22028508SToomas Soome * 28*22028508SToomas Soome * $FreeBSD$ 29*22028508SToomas Soome */ 30*22028508SToomas Soome 31*22028508SToomas Soome#include <machine/asmacros.h> 32*22028508SToomas Soome 33*22028508SToomas Soome .text 34*22028508SToomas Soome .globl amd64_tramp 35*22028508SToomas Soome 36*22028508SToomas Soome/* 37*22028508SToomas Soome * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, 38*22028508SToomas Soome * uint64_t modulep, uint64_t pagetable, uint64_t entry) 39*22028508SToomas Soome */ 40*22028508SToomas Soomeamd64_tramp: 41*22028508SToomas Soome cli /* Make sure we don't get interrupted. */ 42*22028508SToomas Soome movq %rdi,%rsp /* Switch to our temporary stack. */ 43*22028508SToomas Soome 44*22028508SToomas Soome movq %rdx,%r12 /* Stash the kernel values for later. */ 45*22028508SToomas Soome movq %rcx,%r13 46*22028508SToomas Soome movq %r8,%r14 47*22028508SToomas Soome movq %r9,%r15 48*22028508SToomas Soome 49*22028508SToomas Soome callq *%rsi /* Call copy_finish so we're all ready to go. */ 50*22028508SToomas Soome 51*22028508SToomas Soome pushq %r12 /* Push kernend. */ 52*22028508SToomas Soome salq $32,%r13 /* Shift modulep and push it. */ 53*22028508SToomas Soome pushq %r13 54*22028508SToomas Soome pushq %r15 /* Push the entry address. */ 55*22028508SToomas Soome movq %r14,%cr3 /* Switch page tables. */ 56*22028508SToomas Soome ret /* "Return" to kernel entry. */ 57*22028508SToomas Soome 58*22028508SToomas Soome ALIGN_TEXT 59*22028508SToomas Soomeamd64_tramp_end: 60*22028508SToomas Soome 61*22028508SToomas Soome .data 62*22028508SToomas Soome .globl amd64_tramp_size 63*22028508SToomas Soomeamd64_tramp_size: 64*22028508SToomas Soome .long amd64_tramp_end-amd64_tramp 65