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SYS.h revision 1.1 
      1 /*-
      2  * Copyright (c) 1992, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * This software was developed by the Computer Systems Engineering group
      6  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      7  * contributed to Berkeley.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  *	@(#)SYS.h	8.1 (Berkeley) 6/4/93
     38  *
     39  *	from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
     40  *	$Id: SYS.h,v 1.1 1993/10/07 00:21:21 cgd Exp $
     41  */
     42 
     43 #include <sys/syscall.h>
     44 #include <machine/trap.h>
     45 
     46 #ifdef PROF
     47 #define	ENTRY(x) \
     48 	.align 4; .globl _##x; .proc 1; _##x:; .data; .align 4; 1: .long 0; \
     49 	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
     50 	or %o0,%lo(1b),%o0; restore
     51 #else
     52 #define	ENTRY(x) \
     53 	.align 4; .globl _##x; .proc 1; _##x:
     54 #endif
     55 
     56 /*
     57  * ERROR branches to cerror.  This is done with a macro so that I can
     58  * change it to be position independent later, if need be.
     59  */
     60 #define	ERROR() \
     61 	sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
     62 
     63 /*
     64  * SYSCALL is used when further action must be taken before returning.
     65  * Note that it adds a `nop' over what we could do, if we only knew what
     66  * came at label 1....
     67  */
     68 #define	SYSCALL(x) \
     69 	ENTRY(x); mov SYS_##x,%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
     70 
     71 /*
     72  * RSYSCALL is used when the system call should just return.  Here
     73  * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
     74  * and avoid a branch.
     75  */
     76 #define	RSYSCALL(x) \
     77 	ENTRY(x); mov (SYS_##x)|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
     78 	t ST_SYSCALL; ERROR()
     79 
     80 /*
     81  * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
     82  */
     83 #define	PSEUDO(x,y) \
     84 	ENTRY(x); mov (SYS_##y)|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
     85 	t ST_SYSCALL; ERROR()
     86 
     87 #define	ASMSTR		.asciz
     88 
     89 	.globl	cerror
     90