1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90 33 * $FreeBSD$ 34 */ 35 36#ifndef _MACHINE_ASM_H_ 37#define _MACHINE_ASM_H_ 38 39#include <sys/cdefs.h> 40 41#ifdef PIC 42#define PIC_PROLOGUE \ 43 pushl %ebx; \ 44 call 1f; \ 451: \ 46 popl %ebx; \ 47 addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx 48#define PIC_EPILOGUE \ 49 popl %ebx 50#define PIC_PLT(x) x@PLT 51#define PIC_GOT(x) x@GOT(%ebx) 52#define PIC_GOTOFF(x) x@GOTOFF(%ebx) 53#else 54#define PIC_PROLOGUE 55#define PIC_EPILOGUE 56#define PIC_PLT(x) x 57#define PIC_GOTOFF(x) x 58#endif 59 60/* 61 * CNAME and HIDENAME manage the relationship between symbol names in C 62 * and the equivalent assembly language names. CNAME is given a name as 63 * it would be used in a C program. It expands to the equivalent assembly 64 * language name. HIDENAME is given an assembly-language name, and expands 65 * to a possibly-modified form that will be invisible to C programs. 66 */ 67#define CNAME(csym) csym 68#define HIDENAME(asmsym) .asmsym 69 70/* XXX should use .p2align 4,0x90 for -m486. */ 71#define _START_ENTRY .text; .p2align 2,0x90 72 73#define _ENTRY(x) _START_ENTRY; \ 74 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): 75#define END(x) .size x, . - x 76 77#ifdef PROF 78#define ALTENTRY(x) _ENTRY(x); \ 79 pushl %ebp; movl %esp,%ebp; \ 80 call PIC_PLT(HIDENAME(mcount)); \ 81 popl %ebp; \ 82 jmp 9f 83#define ENTRY(x) _ENTRY(x); \ 84 pushl %ebp; movl %esp,%ebp; \ 85 call PIC_PLT(HIDENAME(mcount)); \ 86 popl %ebp; \ 87 9: 88#else 89#define ALTENTRY(x) _ENTRY(x) 90#define ENTRY(x) _ENTRY(x) 91#endif 92 93/* 94 * WEAK_ALIAS: create a weak alias. 95 */ 96#define WEAK_ALIAS(alias,sym) \ 97 .weak alias; \ 98 alias = sym 99 100/* 101 * STRONG_ALIAS: create a strong alias. 102 */ 103#define STRONG_ALIAS(alias,sym) \ 104 .globl alias; \ 105 alias = sym 106 107#define RCSID(x) .text; .asciz x 108 109#undef __FBSDID 110#if !defined(lint) && !defined(STRIP_FBSDID) 111#define __FBSDID(s) .ident s 112#else 113#define __FBSDID(s) /* nothing */ 114#endif /* not lint and not STRIP_FBSDID */ 115 116#endif /* !_MACHINE_ASM_H_ */ 117