1 /* $OpenBSD: asm.h,v 1.11 2011/03/23 16:54:35 pirofti 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 $_C_LABEL(_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) _C_LABEL(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 * WEAK ALIAS: create a weak alias 76 */ 77 #define WEAK_ALIAS(alias,sym) \ 78 .weak alias; \ 79 alias = sym 80 81 /* 82 * WARN_REFERENCES: create a warning if the specified symbol is referenced 83 */ 84 #define WARN_REFERENCES(_sym,_msg) \ 85 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 86 87 /* let kernels and others override entrypoint alignment */ 88 #ifndef _ALIGN_TEXT 89 # define _ALIGN_TEXT .align 2, 0x90 90 #endif 91 92 #define _ENTRY(x) \ 93 .text; _ALIGN_TEXT; .globl x; .type x,@function; x: 94 95 #if defined(PROF) || defined(GPROF) 96 # define _PROF_PROLOGUE \ 97 pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp 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 ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 105 #define NASENTRY(y) _ENTRY(_ASM_LABEL(y)) 106 107 #define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name): 108 109 #define ASMSTR .asciz 110 111 #define RCSID(x) .text; .asciz x 112 113 #ifdef _KERNEL 114 115 #ifdef MULTIPROCESSOR 116 #define CPUVAR(var) %fs:__CONCAT(CPU_INFO_,var) 117 #else 118 #define CPUVAR(var) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,var) 119 #endif 120 121 #endif /* _KERNEL */ 122 123 #endif /* !_MACHINE_ASM_H_ */ 124