1/*
2 * Copyright (c) 1999-2011 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 *	File:	SYS.h
31 *
32 *	Definition of the user side of the UNIX system call interface
33 *	for M98K.
34 *
35 *	Errors are flagged by the location of the trap return (ie., which
36 *	instruction is executed upon rfi):
37 *
38 *		SC PC + 4:	Error (typically branch to cerror())
39 *		SC PC + 8:	Success
40 *
41 * HISTORY
42 * 18-Nov-92	Ben Fathi (benf@next.com)
43 *	Ported to m98k.
44 *
45 *  9-Jan-92	Peter King (king@next.com)
46 *	Created.
47 */
48
49#include <sys/syscall.h>
50
51/* Binary compatibility stubs for syscalls that no longer exist */
52
53#ifndef SYS_setquota
54#define SYS_setquota	148
55#endif
56#ifndef SYS_quota
57#define SYS_quota	149
58#endif
59
60#if defined(__i386__)
61
62#include <architecture/i386/asm_help.h>
63#include <mach/i386/syscall_sw.h>
64
65/*
66 * We have two entry points. int's is used for syscalls which need to preserve
67 * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
68 * for the majority of syscalls which just return a value in %eax.
69 */
70
71#define UNIX_SYSCALL_SYSENTER		call __sysenter_trap
72#define UNIX_SYSCALL(name, nargs)			\
73	.globl	tramp_cerror				;\
74LEAF(_##name, 0)					;\
75	movl	$ SYS_##name, %eax			;\
76	UNIX_SYSCALL_SYSENTER				;\
77	jnb	2f					;\
78	BRANCH_EXTERN(tramp_cerror)  			;\
792:
80
81#define UNIX_SYSCALL_INT(name, nargs)			\
82	.globl	tramp_cerror				;\
83LEAF(_##name, 0)					;\
84	movl	$ SYS_##name, %eax			;\
85	UNIX_SYSCALL_TRAP				;\
86	jnb	2f					;\
87	BRANCH_EXTERN(tramp_cerror)  			;\
882:
89
90#if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
91#define UNIX_SYSCALL_NONAME(name, nargs, cerror)			\
92	movl	$(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax		;\
93	UNIX_SYSCALL_SYSENTER					;\
94	jnb	2f						;\
95	BRANCH_EXTERN(tramp_##cerror)				;\
962:
97#else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
98#define UNIX_SYSCALL_NONAME(name, nargs, cerror)	\
99	movl	$ SYS_##name, %eax			;\
100	UNIX_SYSCALL_SYSENTER				;\
101	jnb	2f					;\
102	BRANCH_EXTERN(tramp_##cerror)			;\
1032:
104#endif
105
106#define UNIX_SYSCALL_INT_NONAME(name, nargs)		\
107	.globl	tramp_cerror_nocancel			;\
108	movl	$ SYS_##name, %eax			;\
109	UNIX_SYSCALL_TRAP				;\
110	jnb	2f					;\
111	BRANCH_EXTERN(tramp_cerror_nocancel) 		;\
1122:
113
114#define PSEUDO(pseudo, name, nargs, cerror)	\
115LEAF(pseudo, 0)					;\
116	UNIX_SYSCALL_NONAME(name, nargs, cerror)
117
118#define PSEUDO_INT(pseudo, name, nargs)		\
119LEAF(pseudo, 0)					;\
120	UNIX_SYSCALL_INT_NONAME(name, nargs)
121
122#define __SYSCALL2(pseudo, name, nargs, cerror)			\
123	PSEUDO(pseudo, name, nargs, cerror)			;\
124	ret
125
126#define __SYSCALL(pseudo, name, nargs)			\
127	PSEUDO(pseudo, name, nargs, cerror)		;\
128	ret
129
130#define __SYSCALL_INT(pseudo, name, nargs)		\
131	PSEUDO_INT(pseudo, name, nargs)			;\
132	ret
133
134#elif defined(__x86_64__)
135
136#include <architecture/i386/asm_help.h>
137#include <mach/i386/syscall_sw.h>
138
139#define UNIX_SYSCALL_SYSCALL	\
140	movq	%rcx, %r10		;\
141	syscall
142
143#define UNIX_SYSCALL(name, nargs)						 \
144	.globl	cerror								;\
145LEAF(_##name, 0)								;\
146	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax			;\
147	UNIX_SYSCALL_SYSCALL							;\
148	jnb		2f							;\
149	movq	%rax, %rdi							;\
150	BRANCH_EXTERN(_cerror)							;\
1512:
152
153#define UNIX_SYSCALL_NONAME(name, nargs, cerror)		 \
154	.globl	cerror								;\
155	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax			;\
156	UNIX_SYSCALL_SYSCALL							;\
157	jnb		2f							;\
158	movq	%rax, %rdi							;\
159	BRANCH_EXTERN(_##cerror)						;\
1602:
161
162#define PSEUDO(pseudo, name, nargs, cerror)			\
163LEAF(pseudo, 0)					;\
164	UNIX_SYSCALL_NONAME(name, nargs, cerror)
165
166#define __SYSCALL2(pseudo, name, nargs, cerror) \
167	PSEUDO(pseudo, name, nargs, cerror)			;\
168	ret
169
170#define __SYSCALL(pseudo, name, nargs)			\
171	PSEUDO(pseudo, name, nargs, cerror)			;\
172	ret
173
174#else
175#error Unsupported architecture
176#endif
177
178