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SYS.h revision 1.5 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * William Jolitz.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: @(#)SYS.h	5.5 (Berkeley) 5/7/91
     37  *	$NetBSD: SYS.h,v 1.5 2003/07/01 14:35:44 marcus Exp $
     38  */
     39 
     40 #include <machine/asm.h>
     41 #include <sys/syscall.h>
     42 
     43 #ifdef __STDC__
     44 #define SYSTRAP(x)					\
     45 		mov.l	903f, r0;			\
     46 		.long	0xc380;	/* trapa #0x80 */	\
     47 		nop;					\
     48 		bra	904f;				\
     49 		nop;					\
     50 		.align	2;				\
     51 	903:	.long	(SYS_ ## x);			\
     52 	904:
     53 #else
     54 #define SYSTRAP(x)					\
     55 		mov.l	903f, r0;			\
     56 		trapa	#0x80;				\
     57 		nop;					\
     58 		bra	904f;				\
     59 		nop;					\
     60 		.align	2;				\
     61 	903:	.long	(SYS_/**/x);			\
     62 	904:
     63 #endif
     64 
     65 #define _SYSCALL_NOERROR(x,y)				\
     66 		ENTRY(x);				\
     67 		SYSTRAP(y)
     68 
     69 #ifdef PIC
     70 #define _SYSCALL(x,y)					\
     71 		.text;					\
     72 	911:	mov.l	912f, r3;			\
     73 		braf	r3;				\
     74 		nop;					\
     75 		.align	2;				\
     76 	912:	.long	cerror-(911b+6);		\
     77 		_SYSCALL_NOERROR(x,y);			\
     78 		bf	911b;				\
     79 		nop
     80 #else
     81 #define _SYSCALL(x,y)					\
     82 		.text;					\
     83 	911:	mov.l	912f, r3;			\
     84 		jmp	@r3;				\
     85 		nop;					\
     86 		.align	2;				\
     87 	912:	.long	cerror;				\
     88 		_SYSCALL_NOERROR(x,y);			\
     89 		bf	911b;				\
     90 		nop
     91 #endif
     92 
     93 #define SYSCALL_NOERROR(x)				\
     94 		_SYSCALL_NOERROR(x,x)
     95 
     96 #define SYSCALL(x)					\
     97 		_SYSCALL(x,x)
     98 
     99 #define PSEUDO_NOERROR(x,y)				\
    100 		_SYSCALL_NOERROR(x,y);			\
    101 		rts;					\
    102 		nop
    103 
    104 #define PSEUDO(x,y)					\
    105 		_SYSCALL(x,y);				\
    106 		rts;					\
    107 		nop
    108 
    109 #define RSYSCALL_NOERROR(x)				\
    110 		PSEUDO_NOERROR(x,x)
    111 
    112 #define RSYSCALL(x)					\
    113 		PSEUDO(x,x)
    114 
    115 #ifdef WEAK_ALIAS
    116 #define	WSYSCALL(weak,strong)				\
    117 	WEAK_ALIAS(weak,strong);			\
    118 	PSEUDO(strong,weak)
    119 #else
    120 #define	WSYSCALL(weak,strong)				\
    121 	PSEUDO(weak,weak)
    122 #endif
    123 
    124 	.globl	cerror
    125