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; \ 56 666: \ 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
