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: src/sys/i386/include/asm.h,v 1.14 2007/08/22 04:26:07 jkoshy Exp $ 34 */ 35 36 #ifndef _MACHINE_ASM_H_ 37 #define _MACHINE_ASM_H_ 38 39 #if defined(__APPLE__) 40 #include "osx_asm.h" 41 #define CNAME(x) EXT(x) 42 #else 43 #include "cdefs-compat.h" 44 45 #ifdef PIC 46 #define PIC_PROLOGUE \ 47 pushl %ebx; \ 48 call 1f; \ 49 1: \ 50 popl %ebx; \ 51 addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx 52 #define PIC_EPILOGUE \ 53 popl %ebx 54 #define PIC_PLT(x) x@PLT 55 #define PIC_GOT(x) x@GOT(%ebx) 56 #else 57 #define PIC_PROLOGUE 58 #define PIC_EPILOGUE 59 #define PIC_PLT(x) x 60 #define PIC_GOT(x) x 61 #endif 62 63 /* 64 * CNAME and HIDENAME manage the relationship between symbol names in C 65 * and the equivalent assembly language names. CNAME is given a name as 66 * it would be used in a C program. It expands to the equivalent assembly 67 * language name. HIDENAME is given an assembly-language name, and expands 68 * to a possibly-modified form that will be invisible to C programs. 69 */ 70 71 72 /* XXX should use .p2align 4,0x90 for -m486. */ 73 #define _START_ENTRY .p2align 2,0x90 74 75 #if defined(__ELF__) 76 #define CNAME(csym) csym 77 #define HIDENAME(asmsym) .asmsym 78 #define _ENTRY(x) .text; _START_ENTRY; \ 79 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): 80 #define END(x) .size x, . - x 81 #elif defined(_WIN32) 82 #ifndef _MSC_VER 83 #define END(x) .end 84 #define _START_ENTRY_WIN .text; _START_ENTRY 85 #else 86 #define END(x) end 87 #define _START_ENTRY_WIN .code; _START_ENTRY 88 #endif 89 #define CNAME(csym) _##csym 90 #define HIDENAME(asmsym) .asmsym 91 #define _ENTRY(x) _START_ENTRY_WIN; \ 92 .globl CNAME(x); .section .drectve; .ascii " -export:", #x; \ 93 .section .text; .def CNAME(x); .scl 2; .type 32; .endef; CNAME(x): 94 #endif 95 96 #ifdef PROF 97 #define ALTENTRY(x) _ENTRY(x); \ 98 pushl %ebp; movl %esp,%ebp; \ 99 call PIC_PLT(HIDENAME(mcount)); \ 100 popl %ebp; \ 101 jmp 9f 102 #define ENTRY(x) _ENTRY(x); \ 103 pushl %ebp; movl %esp,%ebp; \ 104 call PIC_PLT(HIDENAME(mcount)); \ 105 popl %ebp; \ 106 9: 107 #else 108 #define ALTENTRY(x) _ENTRY(x) 109 #define ENTRY(x) _ENTRY(x) 110 #endif 111 112 #define RCSID(x) .text; .asciz x 113 114 #undef __FBSDID 115 #define __FBSDID(s) /* nothing */ 116 117 #endif 118 #endif /* !_MACHINE_ASM_H_ */ 119