| /*- |
| * Copyright (c) 2013 The FreeBSD Foundation |
| * All rights reserved. |
| * |
| * This software was developed by Benno Rice under sponsorship from |
| * the FreeBSD Foundation. |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * $FreeBSD$ |
| */ |
| |
| #include <machine/asmacros.h> |
| |
| .text |
| .globl amd64_tramp |
| |
| /* |
| * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, |
| * uint64_t modulep, uint64_t pagetable, uint64_t entry) |
| */ |
| amd64_tramp: |
| cli /* Make sure we don't get interrupted. */ |
| movq %rdi,%rsp /* Switch to our temporary stack. */ |
| |
| movq %rdx,%r12 /* Stash the kernel values for later. */ |
| movq %rcx,%r13 |
| movq %r8,%r14 |
| movq %r9,%r15 |
| |
| callq *%rsi /* Call copy_finish so we're all ready to go. */ |
| |
| pushq %r12 /* Push kernend. */ |
| salq $32,%r13 /* Shift modulep and push it. */ |
| pushq %r13 |
| pushq %r15 /* Push the entry address. */ |
| movq %r14,%cr3 /* Switch page tables. */ |
| ret /* "Return" to kernel entry. */ |
| |
| ALIGN_TEXT |
| amd64_tramp_end: |
| |
| .data |
| .globl amd64_tramp_size |
| amd64_tramp_size: |
| .long amd64_tramp_end-amd64_tramp |