1 /* $NetBSD: asm.h,v 1.16 2001/11/03 20:24:43 thorpej 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 #ifndef _LOCORE 48 #define _LOCORE 49 #endif 50 #include <machine/frame.h> 51 52 #ifdef __arch64__ 53 #ifndef __ELF__ 54 #define __ELF__ 55 #endif 56 #endif 57 58 /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */ 59 #ifndef _LOCORE 60 #define _LOCORE 61 #endif 62 #include <machine/frame.h> 63 64 #ifdef __ELF__ 65 #define _C_LABEL(name) name 66 #else 67 #ifdef __STDC__ 68 #define _C_LABEL(name) _ ## name 69 #else 70 #define _C_LABEL(name) _/**/name 71 #endif 72 #endif 73 #define _ASM_LABEL(name) name 74 75 #ifdef PIC 76 /* 77 * PIC_PROLOGUE() is akin to the compiler generated function prologue for 78 * PIC code. It leaves the address of the Global Offset Table in DEST, 79 * clobbering register TMP in the process. Using the temporary enables us 80 * to work without a stack frame (doing so requires saving %o7) . 81 */ 82 #define PIC_PROLOGUE(dest,tmp) \ 83 sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \ 84 rd %pc, tmp; \ 85 or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \ 86 add dest,tmp,dest 87 88 /* 89 * PICCY_SET() does the equivalent of a `set var, %dest' instruction in 90 * a PIC-like way, but without involving the Global Offset Table. This 91 * only works for VARs defined in the same file *and* in the text segment. 92 */ 93 #define PICCY_SET(var,dest,tmp) \ 94 3: rd %pc, tmp; add tmp,(var-3b),dest 95 #else 96 #define PIC_PROLOGUE(dest,tmp) 97 #define PICCY_OFFSET(var,dest,tmp) 98 #endif 99 100 #define FTYPE(x) .type x,@function 101 #define OTYPE(x) .type x,@object 102 103 #define _ENTRY(name) \ 104 .align 4; .globl name; .proc 1; FTYPE(name); name: 105 106 #ifdef GPROF 107 /* see _MCOUNT_ENTRY in profile.h */ 108 #ifdef __ELF__ 109 #define _PROF_PROLOGUE \ 110 .data; .align 8; 1: .uaword 0; .uaword 0; \ 111 .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \ 112 or %o0,%lo(1b),%o0; restore 113 #else 114 #define _PROF_PROLOGUE \ 115 .data; .align 8; 1: .uaword 0; .uaword 0; \ 116 .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \ 117 or %o0,%lo(1b),%o0; restore 118 #endif 119 #else 120 #define _PROF_PROLOGUE 121 #endif 122 123 #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE 124 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE 125 #define FUNC(name) ASENTRY(name) 126 #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ 127 OTYPE(_C_LABEL(name)); _C_LABEL(name): 128 129 130 #define ASMSTR .asciz 131 132 #define RCSID(name) .asciz name 133 134 #ifdef __ELF__ 135 #define WEAK_ALIAS(alias,sym) \ 136 .weak alias; \ 137 alias = sym 138 #endif 139 140 /* 141 * WARN_REFERENCES: create a warning if the specified symbol is referenced. 142 */ 143 #ifdef __ELF__ 144 #ifdef __STDC__ 145 #define WARN_REFERENCES(_sym,_msg) \ 146 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 147 #else 148 #define WARN_REFERENCES(_sym,_msg) \ 149 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 150 #endif /* __STDC__ */ 151 #else 152 #ifdef __STDC__ 153 #define __STRING(x) #x 154 #define WARN_REFERENCES(sym,msg) \ 155 .stabs msg ## ,30,0,0,0 ; \ 156 .stabs __STRING(_ ## sym) ## ,1,0,0,0 157 #else 158 #define __STRING(x) "x" 159 #define WARN_REFERENCES(sym,msg) \ 160 .stabs msg,30,0,0,0 ; \ 161 .stabs __STRING(_/**/sym),1,0,0,0 162 #endif /* __STDC__ */ 163 #endif /* __ELF__ */ 164 165 #endif /* _ASM_H_ */ 166