1*ca987d46SWarner Losh/*- 2*ca987d46SWarner Losh * Copyright (c) 2013 The FreeBSD Foundation 3*ca987d46SWarner Losh * All rights reserved. 4*ca987d46SWarner Losh * 5*ca987d46SWarner Losh * This software was developed by Benno Rice under sponsorship from 6*ca987d46SWarner Losh * the FreeBSD Foundation. 7*ca987d46SWarner Losh * Redistribution and use in source and binary forms, with or without 8*ca987d46SWarner Losh * modification, are permitted provided that the following conditions 9*ca987d46SWarner Losh * are met: 10*ca987d46SWarner Losh * 1. Redistributions of source code must retain the above copyright 11*ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer. 12*ca987d46SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright 13*ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer in the 14*ca987d46SWarner Losh * documentation and/or other materials provided with the distribution. 15*ca987d46SWarner Losh * 16*ca987d46SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*ca987d46SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*ca987d46SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*ca987d46SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*ca987d46SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*ca987d46SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*ca987d46SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*ca987d46SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*ca987d46SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*ca987d46SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*ca987d46SWarner Losh * SUCH DAMAGE. 27*ca987d46SWarner Losh * 28*ca987d46SWarner Losh * $FreeBSD$ 29*ca987d46SWarner Losh */ 30*ca987d46SWarner Losh 31*ca987d46SWarner Losh#include <machine/asmacros.h> 32*ca987d46SWarner Losh 33*ca987d46SWarner Losh .text 34*ca987d46SWarner Losh .globl amd64_tramp 35*ca987d46SWarner Losh 36*ca987d46SWarner Losh/* 37*ca987d46SWarner Losh * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, 38*ca987d46SWarner Losh * uint64_t modulep, uint64_t pagetable, uint64_t entry) 39*ca987d46SWarner Losh */ 40*ca987d46SWarner Loshamd64_tramp: 41*ca987d46SWarner Losh cli /* Make sure we don't get interrupted. */ 42*ca987d46SWarner Losh movq %rdi,%rsp /* Switch to our temporary stack. */ 43*ca987d46SWarner Losh 44*ca987d46SWarner Losh movq %rdx,%r12 /* Stash the kernel values for later. */ 45*ca987d46SWarner Losh movq %rcx,%r13 46*ca987d46SWarner Losh movq %r8,%r14 47*ca987d46SWarner Losh movq %r9,%r15 48*ca987d46SWarner Losh 49*ca987d46SWarner Losh callq *%rsi /* Call copy_finish so we're all ready to go. */ 50*ca987d46SWarner Losh 51*ca987d46SWarner Losh pushq %r12 /* Push kernend. */ 52*ca987d46SWarner Losh salq $32,%r13 /* Shift modulep and push it. */ 53*ca987d46SWarner Losh pushq %r13 54*ca987d46SWarner Losh pushq %r15 /* Push the entry address. */ 55*ca987d46SWarner Losh movq %r14,%cr3 /* Switch page tables. */ 56*ca987d46SWarner Losh ret /* "Return" to kernel entry. */ 57*ca987d46SWarner Losh 58*ca987d46SWarner Losh ALIGN_TEXT 59*ca987d46SWarner Loshamd64_tramp_end: 60*ca987d46SWarner Losh 61*ca987d46SWarner Losh .data 62*ca987d46SWarner Losh .globl amd64_tramp_size 63*ca987d46SWarner Loshamd64_tramp_size: 64*ca987d46SWarner Losh .long amd64_tramp_end-amd64_tramp 65