asm.h revision 1dc9e472e19acfe6dc7f41e429236e7eef7ceda1
1/* $OpenBSD: asm.h,v 1.8 2004/06/13 21:49:16 niklas Exp $ */ 2/* $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd Exp $ */ 3 4/*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)asm.h 5.5 (Berkeley) 5/7/91 36 */ 37 38#ifndef _I386_ASM_H_ 39#define _I386_ASM_H_ 40 41/* This is borrowed from FreeBSD /src/sys/i386/include/asmacros.h v1.27 */ 42/* 43 * CNAME and HIDENAME manage the relationship between symbol names in C 44 * and the equivalent assembly language names. CNAME is given a name as 45 * it would be used in a C program. It expands to the equivalent assembly 46 * language name. HIDENAME is given an assembly-language name, and expands 47 * to a possibly-modified form that will be invisible to C programs. 48 */ 49#define CNAME(csym) csym 50#define HIDENAME(asmsym) .asmsym 51 52#ifdef PIC 53#define PIC_PROLOGUE \ 54 pushl %ebx; \ 55 call 666f; \ 56666: \ 57 popl %ebx; \ 58 addl $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %ebx 59#define PIC_EPILOGUE \ 60 popl %ebx 61#define PIC_PLT(x) x@PLT 62#define PIC_GOT(x) x@GOT(%ebx) 63#define PIC_GOTOFF(x) x@GOTOFF(%ebx) 64#else 65#define PIC_PROLOGUE 66#define PIC_EPILOGUE 67#define PIC_PLT(x) x 68#define PIC_GOT(x) x 69#define PIC_GOTOFF(x) x 70#endif 71 72#define _C_LABEL(name) name 73#define _ASM_LABEL(x) x 74 75#define CVAROFF(x, y) _C_LABEL(x) + y 76 77#ifdef __STDC__ 78# define __CONCAT(x,y) x ## y 79# define __STRING(x) #x 80#else 81# define __CONCAT(x,y) x/**/y 82# define __STRING(x) "x" 83#endif 84 85/* 86 * WEAK ALIAS: create a weak alias 87 */ 88#define WEAK_ALIAS(alias,sym) \ 89 .weak alias; \ 90 alias = sym 91 92/* 93 * WARN_REFERENCES: create a warning if the specified symbol is referenced 94 */ 95#define WARN_REFERENCES(_sym,_msg) \ 96 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 97 98/* let kernels and others override entrypoint alignment */ 99#ifndef _ALIGN_TEXT 100# define _ALIGN_TEXT .align 2, 0x90 101#endif 102 103#define _ENTRY(x) \ 104 .text; _ALIGN_TEXT; .globl x; .type x,@function; x: 105 106#ifdef GPROF 107# define _PROF_PROLOGUE \ 108 pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp 109#else 110# define _PROF_PROLOGUE 111#endif 112 113#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 114#define NENTRY(y) _ENTRY(_C_LABEL(y)) 115#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 116 117#define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name): 118 119#define ASMSTR .asciz 120 121#define RCSID(x) .text; .asciz x 122#define __FBSDID(x) RCSID(x) 123 124#endif /* !_I386_ASM_H_ */ 125