1/*
2 * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved. */
29
30#include "SYS.h"
31
32#if defined(__i386__)
33
34LEAF(___syscall, 0)
35	popl	%ecx		// ret addr
36	popl	%eax		// syscall number
37	pushl	%ecx
38	UNIX_SYSCALL_TRAP
39	movl	(%esp),%edx	// add one element to stack so
40	pushl	%ecx		// caller "pop" will work
41	jnb	2f
42	BRANCH_EXTERN(tramp_cerror)
432:
44END(___syscall)
45
46#elif defined(__x86_64__)
47
48// For x86-64, the kernel slides the argument list for us.
49// The number of arguments here is variable, but our macros ignore
50// that value anyway.
51__SYSCALL(___syscall, syscall, 0);
52
53#else
54#error Unsupported architecture
55#endif
56