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asm.h revision 1.11 
      1 /*	$NetBSD: asm.h,v 1.11 1996/09/24 00:05:55 jtc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Allen Briggs
      5  * All rights reserved.
      6  *
      7  * Gleaned from locore.s and sun3 asm.h which had the following copyrights:
      8  * locore.s:
      9  * Copyright (c) 1988 University of Utah.
     10  * Copyright (c) 1982, 1990 The Regents of the University of California.
     11  * sun3/include/asm.h:
     12  * Copyright (c) 1993 Adam Glass
     13  * Copyright (c) 1990 The Regents of the University of California.
     14  *
     15  * Redistribution and use in source and binary forms, with or without
     16  * modification, are permitted provided that the following conditions
     17  * are met:
     18  * 1. Redistributions of source code must retain the above copyright
     19  *    notice, this list of conditions and the following disclaimer.
     20  * 2. Redistributions in binary form must reproduce the above copyright
     21  *    notice, this list of conditions and the following disclaimer in the
     22  *    documentation and/or other materials provided with the distribution.
     23  * 3. All advertising materials mentioning features or use of this software
     24  *    must display the following acknowledgement:
     25  *	This product includes software developed by the University of
     26  *	California, Berkeley and its contributors.
     27  * 4. Neither the name of the University nor the names of its contributors
     28  *    may be used to endorse or promote products derived from this software
     29  *    without specific prior written permission.
     30  *
     31  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     41  * SUCH DAMAGE.
     42  */
     43 
     44 #ifndef _ASM_H_
     45 #define _ASM_H_
     46 
     47 #ifdef __STDC__
     48 #define _C_LABEL(name)		_ ## name
     49 #else
     50 #define _C_LABEL(name)		_/**/name
     51 #endif
     52 #define	_ASM_LABEL(name)	name
     53 
     54 #ifndef _KERNEL
     55 #define	_ENTRY(name) \
     56 	.text; .even; .globl name; .type name,@function; name:
     57 #else
     58 #define	_ENTRY(name) \
     59 	.text; .even; .globl name; name:
     60 #endif
     61 
     62 
     63 #ifdef PROF
     64 #define _PROF_PROLOG	link a6,#0; jbsr mcount; unlk a6
     65 #else
     66 #define _PROF_PROLOG
     67 #endif
     68 
     69 #define ENTRY(name)		_ENTRY(_C_LABEL(name)) _PROF_PROLOG
     70 #define	ASENTRY(name)		_ENTRY(_ASM_LABEL(name)) _PROF_PROLOG
     71 
     72 /*
     73  * The m68k ALTENTRY macro is very different than the traditional
     74  * implementation used by other NetBSD ports.  Usually ALTENTRY
     75  * simply provides an alternate function entry point.  The m68k
     76  * definition takes a second argument and jumps inside the second
     77  * function when profiling is enabled.
     78  *
     79  * The m68k behavior is similar to the ENTRY2 macro found in
     80  * solaris' asm_linkage.h.
     81  *
     82  * Providing ENTRY2 and changing all the code that uses ALTENTRY
     83  * to use it would be a desirable change.
     84  */
     85 #ifdef PROF
     86 #define ALTENTRY(name, rname)	ENTRY(name); jra rname+12
     87 #else
     88 #define ALTENTRY(name, rname)	_ENTRY(_C_LABEL(name))
     89 #endif
     90 
     91 #define RCSID(x)		.text; .asciz x
     92 
     93 #endif /* _ASM_H_ */
     94