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 * 3. 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/amd64/include/asm.h,v 1.14 2003/06/02 05:59:35 peter Exp $ 34 */ 35 36 #ifndef _CPU_ASM_H_ 37 #define _CPU_ASM_H_ 38 39 #include <sys/cdefs.h> 40 41 #ifdef PIC 42 #define PIC_PLT(x) x@PLT 43 #if defined(__x86_64__) 44 #define PIC_GOT(x) x@GOTPCREL(%rip) 45 #else 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_GOT(x) x@GOT(%ebx) 55 #define PIC_GOTOFF(x) x@GOTOFF(%ebx) 56 #endif 57 #else 58 #if !defined(__x86_64__) 59 #define PIC_PROLOGUE 60 #define PIC_EPILOGUE 61 #define PIC_GOTOFF(x) x 62 #endif 63 #define PIC_PLT(x) x 64 #define PIC_GOT(x) x 65 #endif 66 67 #define ALIGN_DATA .p2align 3 /* 8 byte alignment, zero filled */ 68 #define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ 69 #define SUPERALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ 70 71 /* 72 * CNAME and HIDENAME manage the relationship between symbol names in C 73 * and the equivalent assembly language names. CNAME is given a name as 74 * it would be used in a C program. It expands to the equivalent assembly 75 * language name. HIDENAME is given an assembly-language name, and expands 76 * to a possibly-modified form that will be invisible to C programs. 77 */ 78 #define CNAME(csym) csym 79 #define HIDENAME(asmsym) .asmsym 80 81 #if defined(__x86_64__) 82 #define _START_ENTRY .text; .p2align 4,0x90 83 #else 84 /* XXX should use .p2align 4,0x90 for -m486. */ 85 #define _START_ENTRY .text; .p2align 2,0x90 86 #endif 87 88 #define _ENTRY(x) _START_ENTRY; \ 89 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): 90 #define ALTENTRY(x) _ENTRY(x) 91 #define ENTRY(x) _ENTRY(x) 92 93 #define END(x) .size x, . - x 94 95 #define RCSID(x) .text; .asciz x 96 97 #endif /* !_CPU_ASM_H_ */ 98