1 /* $NetBSD: asm.h,v 1.13 1997/04/24 22:49:39 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Jason R. Thorpe. All rights reserved. 5 * Copyright (c) 1994 Allen Briggs 6 * All rights reserved. 7 * 8 * Gleaned from locore.s and sun3 asm.h which had the following copyrights: 9 * locore.s: 10 * Copyright (c) 1988 University of Utah. 11 * Copyright (c) 1982, 1990 The Regents of the University of California. 12 * sun3/include/asm.h: 13 * Copyright (c) 1993 Adam Glass 14 * Copyright (c) 1990 The Regents of the University of California. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 */ 44 45 #ifndef _ASM_H_ 46 #define _ASM_H_ 47 48 #ifdef __STDC__ 49 #define _C_LABEL(name) _ ## name 50 #else 51 #define _C_LABEL(name) _/**/name 52 #endif /* __STDC__ */ 53 54 #define _ASM_LABEL(name) name 55 56 #ifndef _KERNEL 57 #define _ENTRY(name) \ 58 .text; .even; .globl name; .type name,@function; name: 59 #else 60 #define _ENTRY(name) \ 61 .text; .even; .globl name; name: 62 #endif 63 64 65 #ifdef GPROF 66 #define _PROF_PROLOG link a6,#0; jbsr mcount; unlk a6 67 #else 68 #define _PROF_PROLOG 69 #endif 70 71 #define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG 72 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG 73 74 #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) 75 #define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name)) 76 77 /* 78 * The m68k ALTENTRY macro is very different than the traditional 79 * implementation used by other NetBSD ports. Usually ALTENTRY 80 * simply provides an alternate function entry point. The m68k 81 * definition takes a second argument and jumps inside the second 82 * function when profiling is enabled. 83 * 84 * The m68k behavior is similar to the ENTRY2 macro found in 85 * solaris' asm_linkage.h. 86 * 87 * Providing ENTRY2 and changing all the code that uses ALTENTRY 88 * to use it would be a desirable change. 89 */ 90 #ifdef PROF 91 #define ALTENTRY(name, rname) ENTRY(name); jra rname+12 92 #else 93 #define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name)) 94 #endif 95 96 #define RCSID(x) .text ; \ 97 .asciz x ; \ 98 .even 99 100 /* 101 * Global variables of whatever sort. 102 */ 103 #define GLOBAL(x) \ 104 .globl _C_LABEL(x) ; \ 105 _C_LABEL(x): 106 107 #define ASGLOBAL(x) \ 108 .globl _ASM_LABEL(x) ; \ 109 _ASM_LABEL(x): 110 111 /* 112 * ...and local variables. 113 */ 114 #define LOCAL(x) \ 115 _C_LABEL(x): 116 117 #define ASLOCAL(x) \ 118 _ASM_LABEL(x): 119 120 /* 121 * Items in the BSS segment. 122 */ 123 #define BSS(name, size) \ 124 .comm _C_LABEL(name),size 125 126 #define ASBSS(name, size) \ 127 .comm _ASM_LABEL(name),size 128 129 #ifdef _KERNEL 130 /* 131 * Shorthand for calling panic(). 132 * Note the side-effect: it uses up the 9: label, so be careful! 133 */ 134 #define PANIC(x) \ 135 pea 9f ; \ 136 jbsr _C_LABEL(panic) ; \ 137 9: .asciz x ; \ 138 .even 139 140 /* 141 * Shorthand for defining vectors for the vector table. 142 */ 143 #define VECTOR(x) \ 144 .long _C_LABEL(x) 145 146 #define ASVECTOR(x) \ 147 .long _ASM_LABEL(x) 148 149 #define VECTOR_UNUSED \ 150 .long 0 151 152 #endif /* _KERNEL */ 153 154 #endif /* _ASM_H_ */ 155