xref: /netbsd/lib/libc/arch/alpha/SYS.h (revision bf9ec67e)
1 /* $NetBSD: SYS.h,v 1.8 2002/01/14 00:55:55 thorpej Exp $ */
2 
3 /*
4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
5  * All rights reserved.
6  *
7  * Author: Chris G. Demetriou
8  *
9  * Permission to use, copy, modify and distribute this software and
10  * its documentation is hereby granted, provided that both the copyright
11  * notice and this permission notice appear in all copies of the
12  * software, derivative works or modified versions, and any portions
13  * thereof, and that both notices appear in supporting documentation.
14  *
15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18  *
19  * Carnegie Mellon requests users of this software to return to
20  *
21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22  *  School of Computer Science
23  *  Carnegie Mellon University
24  *  Pittsburgh PA 15213-3890
25  *
26  * any improvements or extensions that they make and grant Carnegie the
27  * rights to redistribute these changes.
28  */
29 
30 #include <machine/asm.h>
31 #include <sys/syscall.h>
32 
33 
34 #define	CALLSYS_ERROR(name)					\
35 	CALLSYS_NOERROR(name);					\
36 	br	gp, LLABEL(name,0);				\
37 LLABEL(name,0):							\
38 	LDGP(gp);						\
39 	beq	a3, LLABEL(name,1);				\
40 	jmp	zero, __cerror;					\
41 LLABEL(name,1):
42 
43 
44 #define	SYSCALL(name)						\
45 LEAF(name,0);				/* XXX # of args? */	\
46 	CALLSYS_ERROR(name)
47 
48 #define	SYSCALL_NOERROR(name)					\
49 LEAF(name,0);				/* XXX # of args? */	\
50 	CALLSYS_NOERROR(name)
51 
52 #define	PSEUDO(label,name)					\
53 LEAF(label,0);				/* XXX # of args? */	\
54 	CALLSYS_ERROR(name);					\
55 	RET;							\
56 END(label);
57 
58 #define	PSEUDO_NOERROR(label,name)				\
59 LEAF(label,0);				/* XXX # of args? */	\
60 	CALLSYS_NOERROR(name);					\
61 	RET;							\
62 END(label);
63 
64 #define RSYSCALL(name)						\
65 	SYSCALL(name);						\
66 	RET;							\
67 END(name)
68 
69 #define RSYSCALL_NOERROR(name)					\
70 	SYSCALL_NOERROR(name);					\
71 	RET;							\
72 END(name)
73 
74 #define	WSYSCALL(weak,strong)					\
75 	WEAK_ALIAS(weak,strong);				\
76 	PSEUDO(strong,weak)
77