SYS.h revision 1.2 
1/*	$OpenBSD: SYS.h,v 1.2 2023/01/11 01:55:17 mortimer Exp $	*/
2
3/*
4 * Copyright (c) 2002,2004 Dale Rahn
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#include <sys/syscall.h>
31#include <machine/asm.h>
32
33#define	DL_SYSCALL(n)					\
34	.global	__CONCAT(_dl_,n)			;\
35	.type	__CONCAT(_dl_,n), @function		;\
36	.align	16,0xcc					;\
37__CONCAT(_dl_,n):					;\
38	RETGUARD_SETUP(_dl_##n, r11)			;\
39	RETGUARD_PUSH(r11)				;\
40	movl	$(__CONCAT(SYS_,n)), %eax		;\
41	movq	%rcx, %r10				;\
42	syscall						;\
43	jnc	1f					;\
44	neg	%rax					;\
451:	RETGUARD_POP(r11)				;\
46	RETGUARD_CHECK(_dl_##n, r11)			;\
47	ret
48