1 /* $OpenBSD: asm.h,v 1.4 2003/06/12 01:07:30 deraadt Exp $ */ 2 /* $NetBSD: asm.h,v 1.15 2000/08/02 22:24:39 eeh Exp $ */ 3 4 /* 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. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifndef _ASM_H_ 42 #define _ASM_H_ 43 44 #ifndef _LOCORE 45 #define _LOCORE 46 #endif 47 #include <machine/frame.h> 48 49 /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */ 50 #ifndef _LOCORE 51 #define _LOCORE 52 #endif 53 #include <machine/frame.h> 54 55 #ifdef __ELF__ 56 #define _C_LABEL(name) name 57 #else 58 #ifdef __STDC__ 59 #define _C_LABEL(name) _ ## name 60 #else 61 #define _C_LABEL(name) _/**/name 62 #endif 63 #endif 64 #define _ASM_LABEL(name) name 65 66 #ifdef PIC 67 /* 68 * PIC_PROLOGUE() is akin to the compiler generated function prologue for 69 * PIC code. It leaves the address of the Global Offset Table in DEST, 70 * clobbering register TMP in the process. Using the temporary enables us 71 * to work without a stack frame (doing so requires saving %o7) . 72 */ 73 #define PIC_PROLOGUE(dest,tmp) \ 74 sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \ 75 rd %pc, tmp; \ 76 or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \ 77 add dest,tmp,dest 78 79 /* 80 * PICCY_SET() does the equivalent of a `set var, %dest' instruction in 81 * a PIC-like way, but without involving the Global Offset Table. This 82 * only works for VARs defined in the same file *and* in the text segment. 83 */ 84 #define PICCY_SET(var,dest,tmp) \ 85 3: rd %pc, tmp; add tmp,(var-3b),dest 86 #else 87 #define PIC_PROLOGUE(dest,tmp) 88 #define PICCY_OFFSET(var,dest,tmp) 89 #endif 90 91 #define FTYPE(x) .type x,@function 92 #define OTYPE(x) .type x,@object 93 94 #define _ENTRY(name) \ 95 .align 4; .globl name; .proc 1; FTYPE(name); name: 96 97 #ifdef GPROF 98 #define _PROF_PROLOGUE \ 99 .data; .align 8; 1: .uaword 0; .uaword 0; \ 100 .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \ 101 or %o0,%lo(1b),%o0; restore 102 #else 103 #define _PROF_PROLOGUE 104 #endif 105 106 #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE 107 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE 108 #define FUNC(name) ASENTRY(name) 109 #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ 110 OTYPE(_C_LABEL(name)); _C_LABEL(name): 111 112 113 #define ASMSTR .asciz 114 115 #define RCSID(name) .asciz name 116 117 #ifdef __ELF__ 118 #define WEAK_ALIAS(alias,sym) \ 119 .weak alias; \ 120 alias = sym 121 #endif 122 123 /* 124 * WARN_REFERENCES: create a warning if the specified symbol is referenced. 125 */ 126 #ifdef __ELF__ 127 #ifdef __STDC__ 128 #define WARN_REFERENCES(_sym,_msg) \ 129 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 130 #else 131 #define WARN_REFERENCES(_sym,_msg) \ 132 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 133 #endif /* __STDC__ */ 134 #else 135 #ifdef __STDC__ 136 #define __STRING(x) #x 137 #define WARN_REFERENCES(sym,msg) \ 138 .stabs msg ## ,30,0,0,0 ; \ 139 .stabs __STRING(_ ## sym) ## ,1,0,0,0 140 #else 141 #define __STRING(x) "x" 142 #define WARN_REFERENCES(sym,msg) \ 143 .stabs msg,30,0,0,0 ; \ 144 .stabs __STRING(_/**/sym),1,0,0,0 145 #endif /* __STDC__ */ 146 #endif /* __ELF__ */ 147 148 #endif /* _ASM_H_ */ 149