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SYS.h revision 1.7.4.1 
      1 /* $NetBSD: SYS.h,v 1.7.4.1 2002/01/28 20:49:40 nathanw 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 (at) 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