1/* $NetBSD: asm.h,v 1.14 2010/12/20 21:11:24 joerg 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 __x86_64__ 41 42#ifdef PIC 43#define PIC_PLT(x) x@PLT 44#define PIC_GOT(x) x@GOTPCREL(%rip) 45#else 46#define PIC_PLT(x) x 47#define PIC_GOT(x) x 48#endif 49 50# define _C_LABEL(x) x 51#define _ASM_LABEL(x) x 52 53#define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip) 54 55#ifdef __STDC__ 56# define __CONCAT(x,y) x ## y 57# define __STRING(x) #x 58#else 59# define __CONCAT(x,y) x/**/y 60# define __STRING(x) "x" 61#endif 62 63/* let kernels and others override entrypoint alignment */ 64#ifndef _ALIGN_TEXT 65# ifdef _STANDALONE 66# define _ALIGN_TEXT .align 4 67# else 68# define _ALIGN_TEXT .align 16 69# endif 70#endif 71 72#define _ENTRY(x) \ 73 .text; _ALIGN_TEXT; .globl x; .type x,@function; x: 74#define _LABEL(x) \ 75 .globl x; x: 76 77#ifdef _KERNEL 78/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */ 79#ifdef __STDC__ 80#define IDTVEC(name) \ 81 ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name: 82#else 83#define IDTVEC(name) \ 84 ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name: 85#endif /* __STDC__ */ 86#endif /* _KERNEL */ 87 88#ifdef __STDC__ 89#define CPUVAR(off) %gs:CPU_INFO_ ## off 90#else 91#define CPUVAR(off) %gs:CPU_INFO_/**/off 92#endif 93 94 95#ifdef GPROF 96# define _PROF_PROLOGUE \ 97 pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp 98#else 99# define _PROF_PROLOGUE 100#endif 101 102#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 103#define NENTRY(y) _ENTRY(_C_LABEL(y)) 104#define ALTENTRY(x) NENTRY(x) 105#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 106#define LABEL(y) _LABEL(_C_LABEL(y)) 107 108#define ASMSTR .asciz 109 110#define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 111 112#define WEAK_ALIAS(alias,sym) \ 113 .weak alias; \ 114 alias = sym 115 116/* 117 * STRONG_ALIAS: create a strong alias. 118 */ 119#define STRONG_ALIAS(alias,sym) \ 120 .globl alias; \ 121 alias = sym 122 123#ifdef __STDC__ 124#define WARN_REFERENCES(sym,msg) \ 125 .pushsection .gnu.warning. ## sym; \ 126 .ascii msg; \ 127 .popsection 128#else 129#define WARN_REFERENCES(sym,msg) \ 130 .pushsection .gnu.warning./**/sym; \ 131 .ascii msg; \ 132 .popsection 133#endif /* __STDC__ */ 134 135#else /* __x86_64__ */ 136 137#include <i386/asm.h> 138 139#endif /* __x86_64__ */ 140 141#endif /* !_AMD64_ASM_H_ */ 142