1 /* $OpenBSD: asm.h,v 1.19 2022/12/08 01:25:45 guenther 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 _MACHINE_ASM_H_ 39 #define _MACHINE_ASM_H_ 40 41 #ifdef __PIC__ 42 #define PIC_PROLOGUE \ 43 pushl %ebx; \ 44 call 666f; \ 45 666: \ 46 popl %ebx; \ 47 addl $_GLOBAL_OFFSET_TABLE_+[.-666b], %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_GOT(x) x 58 #define PIC_GOTOFF(x) x 59 #endif 60 61 #define _C_LABEL(name) name 62 #define _ASM_LABEL(x) x 63 64 #define CVAROFF(x, y) x + y 65 66 #ifdef __STDC__ 67 # define __CONCAT(x,y) x ## y 68 # define __STRING(x) #x 69 #else 70 # define __CONCAT(x,y) x/**/y 71 # define __STRING(x) "x" 72 #endif 73 74 /* 75 * STRONG_ALIAS, WEAK_ALIAS 76 * Create a strong or weak alias. 77 */ 78 #define STRONG_ALIAS(alias,sym) \ 79 .global alias; \ 80 alias = sym 81 #define WEAK_ALIAS(alias,sym) \ 82 .weak alias; \ 83 alias = sym 84 85 /* let kernels and others override entrypoint alignment */ 86 #ifndef _ALIGN_TEXT 87 # define _ALIGN_TEXT .align 2, 0x90 88 #endif 89 90 /* NB == No Binding: use .globl or .weak as necessary */ 91 #define _ENTRY_NB(x) \ 92 .text; _ALIGN_TEXT; .type x,@function; x: 93 #define _ENTRY(x) .globl x; _ENTRY_NB(x) 94 95 #ifdef _KERNEL 96 #define KUTEXT .section .kutext, "ax" 97 98 #define IDTVEC(name) \ 99 KUTEXT; ALIGN_TEXT; \ 100 .globl X##name; X##name: 101 #define KIDTVEC(name) \ 102 .text; ALIGN_TEXT; \ 103 .globl X##name; X##name: 104 #define KUENTRY(x) \ 105 KUTEXT; _ALIGN_TEXT; .globl x; .type x,@function; x: 106 107 #endif /* _KERNEL */ 108 109 #if defined(PROF) || defined(GPROF) 110 # define _PROF_PROLOGUE \ 111 pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp 112 #else 113 # define _PROF_PROLOGUE 114 #endif 115 116 #define ENTRY(y) _ENTRY(y); _PROF_PROLOGUE 117 #define ENTRY_NB(y) _ENTRY_NB(y); _PROF_PROLOGUE 118 #define NENTRY(y) _ENTRY(y) 119 #define ASENTRY(y) _ENTRY(y); _PROF_PROLOGUE 120 #define NASENTRY(y) _ENTRY(y) 121 #define END(y) .size y, . - y 122 123 #define ALTENTRY(name) .globl name; name: 124 125 #ifdef _KERNEL 126 127 #define CPUVAR(var) %fs:__CONCAT(CPU_INFO_,var) 128 129 #endif /* _KERNEL */ 130 131 #endif /* !_MACHINE_ASM_H_ */ 132