asm.h revision 92998
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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90 37 * from: FreeBSD: src/sys/i386/include/asm.h,v 1.7 2000/01/25 38 * $FreeBSD: head/sys/sparc64/include/asm.h 92998 2002-03-23 02:01:27Z obrien $ 39 */ 40 41#ifndef _MACHINE_ASM_H_ 42#define _MACHINE_ASM_H_ 43 44#define __ASM__ 45 46#include <sys/cdefs.h> 47 48#ifdef PIC 49#define PIC_PROLOGUE(r1, r2) \ 50 sethi %hi(_GLOBAL_OFFSET_TABLE_-4), r1 ; \ 51 rd %pc, r2 ; \ 52 or r1, %lo(_GLOBAL_OFFSET_TABLE_+4), r1 ; \ 53 add r2, r1, r2 54#define SET(name, r1, r2) \ 55 set name, r2 ; \ 56 ldx [r1 + r2], r2 57#else 58#define PIC_PROLOGUE(r1, r2) 59#define SET(name, r1, r2) \ 60 set name, r2 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#define CNAME(csym) csym 71#define HIDENAME(asmsym) __CONCAT(.,asmsym) 72 73#define CCFSZ 192 74#define SPOFF 2047 75 76#define _START_ENTRY \ 77 .text ; \ 78 .p2align 4 79 80/* 81 * Define a function entry point. 82 * 83 * The compiler produces #function for the .type pseudo-op, but the '#' 84 * character has special meaning in cpp macros, so we use @function like 85 * other architectures. The assembler seems to accept both. 86 * The assembler also accepts a .proc pseudo-op, which is used by the 87 * peep hole optimizer, whose argument is the type code of the return 88 * value. Since this is difficult to predict and its expected that 89 * assembler code is already optimized, we leave it out. 90 */ 91#define _ENTRY(x) \ 92 _START_ENTRY ; \ 93 .globl CNAME(x) ; \ 94 .type CNAME(x),@function ; \ 95CNAME(x): 96 97#define ENTRY(x) _ENTRY(x) 98#define END(x) .size x, . - x 99 100/* 101 * Kernel RCS ID tag and copyright macros 102 */ 103 104#if !defined(lint) && !defined(STRIP_FBSDID) 105#define __FBSDID(s) .ident s 106#else 107#define __FBSDID(s) /* nothing */ 108#endif /* not lint and not STRIP_FBSDID */ 109 110#endif /* !_MACHINE_ASM_H_ */ 111