xref: /freebsd/sys/amd64/sgx/sgx_support.S (revision 0957b409)
1/*-
2 * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * This software was developed by BAE Systems, the University of Cambridge
6 * Computer Laboratory, and Memorial University under DARPA/AFRL contract
7 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
8 * (TC) research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD$
32 */
33
34#include <machine/asmacros.h>
35#include <amd64/sgx/sgxvar.h>
36
37#include "assym.inc"
38
39	.text
40
41/*
42 * int
43 * sgx_encls(uint32_t eax, uint64_t rbx, uint64_t rcx, uint64_t rdx);
44 *           %edi,         %rsi,         %rdx,         %rcx
45 */
46ENTRY(sgx_encls)
47	PUSH_FRAME_POINTER
48	pushq	%rbx
49	movq	PCPU(CURPCB),%r8
50	movl	%edi,%eax
51	movq	%rsi,%rbx
52	xchgq	%rdx,%rcx
53	movq	$sgx_onfault,PCB_ONFAULT(%r8)
54	.byte 0x0f, 0x01, 0xcf
55	movq	$0,PCB_ONFAULT(%r8)
56	popq	%rbx
57	POP_FRAME_POINTER
58	ret
59END(sgx_encls)
60
61/*
62 * SGX operations fault handler
63 */
64	ALIGN_TEXT
65sgx_onfault:
66	movq	$0,PCB_ONFAULT(%r8)
67	movl	$SGX_EFAULT,%eax
68	popq	%rbx
69	POP_FRAME_POINTER
70	ret
71