asm.h revision 1.23.8.2
1 /* $NetBSD: asm.h,v 1.23.8.2 2001/05/27 01:01:09 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1994 Allen Briggs 41 * All rights reserved. 42 * 43 * Gleaned from locore.s and sun3 asm.h which had the following copyrights: 44 * locore.s: 45 * Copyright (c) 1988 University of Utah. 46 * Copyright (c) 1982, 1990 The Regents of the University of California. 47 * sun3/include/asm.h: 48 * Copyright (c) 1993 Adam Glass 49 * Copyright (c) 1990 The Regents of the University of California. 50 * 51 * Redistribution and use in source and binary forms, with or without 52 * modification, are permitted provided that the following conditions 53 * are met: 54 * 1. Redistributions of source code must retain the above copyright 55 * notice, this list of conditions and the following disclaimer. 56 * 2. Redistributions in binary form must reproduce the above copyright 57 * notice, this list of conditions and the following disclaimer in the 58 * documentation and/or other materials provided with the distribution. 59 * 3. All advertising materials mentioning features or use of this software 60 * must display the following acknowledgement: 61 * This product includes software developed by the University of 62 * California, Berkeley and its contributors. 63 * 4. Neither the name of the University nor the names of its contributors 64 * may be used to endorse or promote products derived from this software 65 * without specific prior written permission. 66 * 67 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 68 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 69 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 70 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 71 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 72 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 73 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 74 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 75 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 76 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 77 * SUCH DAMAGE. 78 */ 79 80 #ifndef _M68K_ASM_H_ 81 #define _M68K_ASM_H_ 82 83 #if defined(__ELF__) && defined(PIC) 84 #define PIC_PLT(name) name@PLTPC 85 #else 86 #define PIC_PLT(name) name 87 #endif 88 89 #ifdef __ELF__ 90 # if __STDC__ 91 # define _C_LABEL(name) name 92 # else 93 # define _C_LABEL(name) name 94 #endif /* __STDC__ */ 95 #else /* __ELF__ */ 96 # if __STDC__ 97 # define _C_LABEL(name) _ ## name 98 # else 99 # define _C_LABEL(name) _/**/name 100 # endif /* __STDC__ */ 101 #endif /* __ELF__ */ 102 103 #define _ASM_LABEL(name) name 104 105 #define _ENTRY(name) \ 106 .text; .even; .globl name; .type name,@function; name: 107 108 #ifdef __ELF__ 109 #define MCOUNT_ENTRY __mcount 110 #else 111 #define MCOUNT_ENTRY mcount 112 #endif 113 114 #ifdef GPROF 115 #define _PROF_PROLOG link %a6,#0; jbsr MCOUNT_ENTRY; unlk %a6 116 #else 117 #define _PROF_PROLOG 118 #endif 119 120 #define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG 121 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG 122 123 #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) 124 #define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name)) 125 126 /* 127 * The m68k ALTENTRY macro is very different than the traditional 128 * implementation used by other NetBSD ports. Usually ALTENTRY 129 * simply provides an alternate function entry point. The m68k 130 * definition takes a second argument and jumps inside the second 131 * function when profiling is enabled. 132 * 133 * The m68k behavior is similar to the ENTRY2 macro found in 134 * solaris' asm_linkage.h. 135 * 136 * Providing ENTRY2 and changing all the code that uses ALTENTRY 137 * to use it would be a desirable change. 138 */ 139 #ifdef PROF 140 #define ALTENTRY(name, rname) ENTRY(name); jra rname+12 141 #else 142 #define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name)) 143 #endif 144 145 #define RCSID(x) .text ; \ 146 .asciz x ; \ 147 .even 148 149 /* 150 * Global variables of whatever sort. 151 */ 152 #define GLOBAL(x) \ 153 .globl _C_LABEL(x) ; \ 154 _C_LABEL(x): 155 156 #define ASGLOBAL(x) \ 157 .globl _ASM_LABEL(x) ; \ 158 _ASM_LABEL(x): 159 160 /* 161 * ...and local variables. 162 */ 163 #define LOCAL(x) \ 164 _C_LABEL(x): 165 166 #define ASLOCAL(x) \ 167 _ASM_LABEL(x): 168 169 /* 170 * Items in the BSS segment. 171 */ 172 #define BSS(name, size) \ 173 .comm _C_LABEL(name),size 174 175 #define ASBSS(name, size) \ 176 .comm _ASM_LABEL(name),size 177 178 #ifdef _KERNEL 179 /* 180 * Shorthand for calling panic(). 181 * Note the side-effect: it uses up the 9: label, so be careful! 182 */ 183 #define PANIC(x) \ 184 pea 9f ; \ 185 jbsr _C_LABEL(panic) ; \ 186 9: .asciz x ; \ 187 .even 188 189 #endif /* _KERNEL */ 190 191 /* 192 * Shorthand for defining vectors for the vector table. 193 */ 194 #define VECTOR(x) \ 195 .long _C_LABEL(x) 196 197 #define ASVECTOR(x) \ 198 .long _ASM_LABEL(x) 199 200 #define VECTOR_UNUSED \ 201 .long 0 202 203 #ifdef __ELF__ 204 #define WEAK_ALIAS(alias,sym) \ 205 .weak alias; \ 206 alias = sym 207 #endif 208 209 #ifdef __STDC__ 210 #define __STRING(x) #x 211 #define WARN_REFERENCES(sym,msg) \ 212 .stabs msg ## ,30,0,0,0 ; \ 213 .stabs __STRING(_ ## sym) ## ,1,0,0,0 214 #else 215 #define __STRING(x) "x" 216 #define WARN_REFERENCES(sym,msg) \ 217 .stabs msg,30,0,0,0 ; \ 218 .stabs __STRING(_/**/sym),1,0,0,0 219 #endif /* __STDC__ */ 220 221 /* 222 * Macros to hide shortcomings in the 68010. 223 */ 224 #ifndef __mc68010__ 225 #define EXTBL(reg) \ 226 extbl reg 227 #else /* __mc68010__ */ 228 #define EXTBL(reg) \ 229 extw reg ; \ 230 extl reg 231 #endif /* __mc68010__ */ 232 233 #endif /* _M68K_ASM_H_ */ 234
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