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SYS.h revision 1.3 
      1 /*	$NetBSD: SYS.h,v 1.3 1996/09/15 18:18:26 cgd 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 #define CALLSYS(num)						\
     34 	CONST(num, v0);						\
     35 	call_pal 0x83;			/* op_callsys */
     36 
     37 #define	SYSCALL_NOLABEL(x)					\
     38 	.set	noat;						\
     39 	CALLSYS(SYS_/**/x);					\
     40 	br	gp, L8000;					\
     41 L8000:							\
     42 	SETGP(gp);						\
     43 	beq	a3, L8001;					\
     44 	lda	at_reg, cerror;					\
     45 	jmp	zero, (at_reg);					\
     46 L8001:							\
     47 	.set	at
     48 
     49 #define	SYSCALL(x)	LEAF(x, 0 /* XXX */); SYSCALL_NOLABEL(x);
     50 #define RSYSCALL(x)	SYSCALL(x); RET; END(x);
     51 
     52 #define	PSEUDO(x,y)						\
     53 LEAF(x,0);				/* unknown # of args */	\
     54 	CALLSYS(SYS_/**/y);					\
     55 	RET;							\
     56 END(x);
     57