xref: /xnu-11215.41.3/libsyscall/custom/__syscall.s (revision 33de042d024d46de5ff4e89f2471de6608e37fa4)
1*33de042dSApple OSS Distributions/*
2*33de042dSApple OSS Distributions * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
3*33de042dSApple OSS Distributions *
4*33de042dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*33de042dSApple OSS Distributions *
6*33de042dSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*33de042dSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*33de042dSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*33de042dSApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*33de042dSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*33de042dSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*33de042dSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*33de042dSApple OSS Distributions * terms of an Apple operating system software license agreement.
14*33de042dSApple OSS Distributions *
15*33de042dSApple OSS Distributions * Please obtain a copy of the License at
16*33de042dSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*33de042dSApple OSS Distributions *
18*33de042dSApple OSS Distributions * The Original Code and all software distributed under the License are
19*33de042dSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*33de042dSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*33de042dSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*33de042dSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*33de042dSApple OSS Distributions * Please see the License for the specific language governing rights and
24*33de042dSApple OSS Distributions * limitations under the License.
25*33de042dSApple OSS Distributions *
26*33de042dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*33de042dSApple OSS Distributions */
28*33de042dSApple OSS Distributions/* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved. */
29*33de042dSApple OSS Distributions
30*33de042dSApple OSS Distributions#include "SYS.h"
31*33de042dSApple OSS Distributions
32*33de042dSApple OSS Distributions#if defined(__i386__)
33*33de042dSApple OSS Distributions
34*33de042dSApple OSS DistributionsLEAF(___syscall, 0)
35*33de042dSApple OSS Distributions	popl	%ecx		// ret addr
36*33de042dSApple OSS Distributions	popl	%eax		// syscall number
37*33de042dSApple OSS Distributions	pushl	%ecx
38*33de042dSApple OSS Distributions	UNIX_SYSCALL_TRAP
39*33de042dSApple OSS Distributions	movl	(%esp),%edx	// add one element to stack so
40*33de042dSApple OSS Distributions	pushl	%ecx		// caller "pop" will work
41*33de042dSApple OSS Distributions	jnb	2f
42*33de042dSApple OSS Distributions	BRANCH_EXTERN(tramp_cerror)
43*33de042dSApple OSS Distributions2:
44*33de042dSApple OSS DistributionsEND(___syscall)
45*33de042dSApple OSS Distributions
46*33de042dSApple OSS Distributions#elif defined(__x86_64__)
47*33de042dSApple OSS Distributions
48*33de042dSApple OSS Distributions// For x86-64, the kernel slides the argument list for us.
49*33de042dSApple OSS Distributions// The number of arguments here is variable, but our macros ignore
50*33de042dSApple OSS Distributions// that value anyway.
51*33de042dSApple OSS Distributions__SYSCALL(___syscall, syscall, 0);
52*33de042dSApple OSS Distributions
53*33de042dSApple OSS Distributions#elif defined(__arm__)
54*33de042dSApple OSS Distributions
55*33de042dSApple OSS Distributions__SYSCALL(___syscall, syscall, 7)
56*33de042dSApple OSS Distributions
57*33de042dSApple OSS Distributions#elif defined(__arm64__)
58*33de042dSApple OSS Distributions
59*33de042dSApple OSS Distributions/*
60*33de042dSApple OSS Distributions * Ignore nominal number of arguments: just pop from stack and let the kernel
61*33de042dSApple OSS Distributions * interpret.
62*33de042dSApple OSS Distributions */
63*33de042dSApple OSS Distributions#include <mach/arm64/asm.h>
64*33de042dSApple OSS DistributionsMI_ENTRY_POINT(___syscall)
65*33de042dSApple OSS Distributions		ldp x1, x2, [sp]
66*33de042dSApple OSS Distributions		ldp x3, x4, [sp, #16]
67*33de042dSApple OSS Distributions		ldp x5, x6, [sp, #32]
68*33de042dSApple OSS Distributions		ldr x7, [sp, #48]
69*33de042dSApple OSS Distributions		DO_SYSCALL(SYS_syscall, cerror)
70*33de042dSApple OSS Distributions		ret
71*33de042dSApple OSS Distributions#else
72*33de042dSApple OSS Distributions#error Unsupported architecture
73*33de042dSApple OSS Distributions#endif
74