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 *	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#ifndef SYS_setquota
52#define SYS_setquota	148
53#endif
54#ifndef SYS_quota
55#define SYS_quota	149
56#endif
57
58#if defined(__ppc__) || defined(__ppc64__)
59
60#include <architecture/ppc/mode_independent_asm.h>
61
62/* From rhapsody kernel mach/ppc/syscall_sw.h */
63#define	kernel_trap_args_0
64#define	kernel_trap_args_1
65#define	kernel_trap_args_2
66#define	kernel_trap_args_3
67#define	kernel_trap_args_4
68#define	kernel_trap_args_5
69#define	kernel_trap_args_6
70#define	kernel_trap_args_7
71#define	kernel_trap_args_8
72/* End of rhapsody kernel mach/ppc/syscall_sw.h */
73
74/*
75 * Macros.
76 */
77
78#define	SYSCALL(name, nargs)			\
79	.globl	cerror				@\
80    MI_ENTRY_POINT(_##name)     @\
81	kernel_trap_args_##nargs    @\
82	li	r0,SYS_##name			@\
83	sc                          @\
84	b	1f                      @\
85	blr                         @\
861:	MI_BRANCH_EXTERNAL(cerror)
87
88
89#define	SYSCALL_NONAME(name, nargs)		\
90	.globl	cerror				@\
91	kernel_trap_args_##nargs    @\
92	li	r0,SYS_##name			@\
93	sc                          @\
94	b	1f                      @\
95	b	2f                      @\
961:	MI_BRANCH_EXTERNAL(cerror)  @\
972:
98
99
100#define	PSEUDO(pseudo, name, nargs)		\
101    .private_extern  _##pseudo           @\
102    .text                       @\
103    .align  2                   @\
104_##pseudo:                      @\
105	SYSCALL_NONAME(name, nargs)
106
107#define __SYSCALL(pseudo, name, nargs)	\
108    PSEUDO(pseudo, name, nargs)	@\
109    blr
110
111#elif defined(__i386__)
112
113#include <architecture/i386/asm_help.h>
114#include <mach/i386/syscall_sw.h>
115
116/*
117 * We have two entry points. int's is used for syscalls which need to preserve
118 * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
119 * for the majority of syscalls which just return a value in %eax.
120 */
121
122#define UNIX_SYSCALL_SYSENTER		call __sysenter_trap
123#define UNIX_SYSCALL(name, nargs)			\
124	.globl	cerror					;\
125LEAF(_##name, 0)					;\
126	movl	$ SYS_##name, %eax			;\
127	UNIX_SYSCALL_SYSENTER				;\
128	jnb	2f					;\
129	BRANCH_EXTERN(cerror)  				;\
1302:
131
132#define UNIX_SYSCALL_INT(name, nargs)			\
133	.globl	cerror					;\
134LEAF(_##name, 0)					;\
135	movl	$ SYS_##name, %eax			;\
136	UNIX_SYSCALL_TRAP				;\
137	jnb	2f					;\
138	BRANCH_EXTERN(cerror)  				;\
1392:
140
141#if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
142#define UNIX_SYSCALL_NONAME(name, nargs)			\
143	movl	$(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax		;\
144	UNIX_SYSCALL_SYSENTER					;\
145	jnb	2f						;\
146	BRANCH_EXTERN(cerror)					;\
1472:
148#else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
149#define UNIX_SYSCALL_NONAME(name, nargs)		\
150	.globl	cerror					;\
151	movl	$ SYS_##name, %eax			;\
152	UNIX_SYSCALL_SYSENTER				;\
153	jnb	2f					;\
154	BRANCH_EXTERN(cerror)				;\
1552:
156#endif
157
158#define UNIX_SYSCALL_INT_NONAME(name, nargs)		\
159	.globl	cerror					;\
160	movl	$ SYS_##name, %eax			;\
161	UNIX_SYSCALL_TRAP				;\
162	jnb	2f					;\
163	BRANCH_EXTERN(cerror)  				;\
1642:
165
166#define PSEUDO(pseudo, name, nargs)			\
167LEAF(_##pseudo, 0)					;\
168	UNIX_SYSCALL_NONAME(name, nargs)
169
170#define PSEUDO_INT(pseudo, name, nargs)			\
171LEAF(_##pseudo, 0)					;\
172	UNIX_SYSCALL_INT_NONAME(name, nargs)
173
174#define __SYSCALL(pseudo, name, nargs)			\
175	PSEUDO(pseudo, name, nargs)			;\
176	ret
177
178#define __SYSCALL_INT(pseudo, name, nargs)		\
179	PSEUDO_INT(pseudo, name, nargs)			;\
180	ret
181
182#elif defined(__x86_64__)
183
184#include <architecture/i386/asm_help.h>
185#include <mach/i386/syscall_sw.h>
186
187#define UNIX_SYSCALL_SYSCALL	\
188	movq	%rcx, %r10		;\
189	syscall
190
191#define UNIX_SYSCALL(name, nargs)			\
192	.globl	cerror					;\
193LEAF(_##name, 0)					;\
194	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax	;\
195	UNIX_SYSCALL_SYSCALL				;\
196	jnb	2f					;\
197	BRANCH_EXTERN(cerror)  				;\
1982:
199
200#define UNIX_SYSCALL_NONAME(name, nargs)		\
201	.globl	cerror					;\
202	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax	;\
203	UNIX_SYSCALL_SYSCALL				;\
204	jnb	2f					;\
205	BRANCH_EXTERN(cerror)  				;\
2062:
207
208#define PSEUDO(pseudo, name, nargs)			\
209LEAF(_##pseudo, 0)					;\
210	UNIX_SYSCALL_NONAME(name, nargs)
211
212#define __SYSCALL(pseudo, name, nargs)			\
213	PSEUDO(pseudo, name, nargs)			;\
214	ret
215
216#else
217#error Unsupported architecture
218#endif
219