asm.h revision 1.8
1/* $NetBSD: asm.h,v 1.8 2007/08/29 23:38:03 ad Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)asm.h 5.5 (Berkeley) 5/7/91 35 */ 36 37#ifndef _AMD64_ASM_H_ 38#define _AMD64_ASM_H_ 39 40#ifdef PIC 41#define PIC_PLT(x) x@PLT 42#define PIC_GOT(x) x@GOTPCREL(%rip) 43#else 44#define PIC_PLT(x) x 45#define PIC_GOT(x) x 46#endif 47 48# define _C_LABEL(x) x 49#define _ASM_LABEL(x) x 50 51#define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip) 52 53#ifdef __STDC__ 54# define __CONCAT(x,y) x ## y 55# define __STRING(x) #x 56#else 57# define __CONCAT(x,y) x/**/y 58# define __STRING(x) "x" 59#endif 60 61/* let kernels and others override entrypoint alignment */ 62#ifndef _ALIGN_TEXT 63# ifdef _STANDALONE 64# define _ALIGN_TEXT .align 4 65# else 66# define _ALIGN_TEXT .align 32 67# endif 68#endif 69 70#define _ENTRY(x) \ 71 .text; _ALIGN_TEXT; .globl x; .type x,@function; x: 72#define _LABEL(x) \ 73 .globl x; x: 74 75#ifdef _KERNEL 76/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */ 77#ifdef __STDC__ 78#define IDTVEC(name) \ 79 ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name: 80#else 81#define IDTVEC(name) \ 82 ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name: 83#endif /* __STDC__ */ 84#endif /* _KERNEL */ 85 86#ifdef __STDC__ 87#define CPUVAR(off) %gs:CPU_INFO_ ## off 88#else 89#define CPUVAR(off) %gs:CPU_INFO_/**/off 90#endif 91 92 93#ifdef GPROF 94# define _PROF_PROLOGUE \ 95 pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp 96#else 97# define _PROF_PROLOGUE 98#endif 99 100#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 101#define NENTRY(y) _ENTRY(_C_LABEL(y)) 102#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 103#define LABEL(y) _LABEL(_C_LABEL(y)) 104 105#define ASMSTR .asciz 106 107#define RCSID(x) .text; .asciz x 108 109#define WEAK_ALIAS(alias,sym) \ 110 .weak alias; \ 111 alias = sym 112 113/* 114 * STRONG_ALIAS: create a strong alias. 115 */ 116#define STRONG_ALIAS(alias,sym) \ 117 .globl alias; \ 118 alias = sym 119 120/* XXXfvdl do not use stabs here */ 121#ifdef __STDC__ 122#define WARN_REFERENCES(sym,msg) \ 123 .stabs msg ## ,30,0,0,0 ; \ 124 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 125#else 126#define WARN_REFERENCES(sym,msg) \ 127 .stabs msg,30,0,0,0 ; \ 128 .stabs __STRING(sym),1,0,0,0 129#endif /* __STDC__ */ 130 131#endif /* !_AMD64_ASM_H_ */ 132