asm.h revision 86551
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 86551 2001-11-18 17:56:46Z jake $ 39 */ 40 41#ifndef _MACHINE_ASM_H_ 42#define _MACHINE_ASM_H_ 43 44#include <sys/cdefs.h> 45 46#ifdef PIC 47#define PIC_PROLOGUE(r1, r2) \ 48 sethi %hi(_GLOBAL_OFFSET_TABLE_-4), r1 ; \ 49 rd %pc, r2 ; \ 50 or r1, %lo(_GLOBAL_OFFSET_TABLE_+4), r1 ; \ 51 add r2, r1, r2 52#define SET(name, r1, r2) \ 53 set name, r2 ; \ 54 ldx [r1 + r2], r2 55#else 56#define PIC_PROLOGUE(r1, r2) 57#define SET(name, r1, r2) \ 58 set name, r2 59#endif 60 61/* 62 * CNAME and HIDENAME manage the relationship between symbol names in C 63 * and the equivalent assembly language names. CNAME is given a name as 64 * it would be used in a C program. It expands to the equivalent assembly 65 * language name. HIDENAME is given an assembly-language name, and expands 66 * to a possibly-modified form that will be invisible to C programs. 67 */ 68#define CNAME(csym) csym 69#define HIDENAME(asmsym) __CONCAT(.,asmsym) 70 71#define CCFSZ 192 72#define SPOFF 2047 73 74#define _START_ENTRY \ 75 .text ; \ 76 .p2align 4 77 78/* 79 * Define a function entry point. 80 * 81 * The compiler produces #function for the .type pseudo-op, but the '#' 82 * character has special meaning in cpp macros, so we use @function like 83 * other architectures. The assembler seems to accept both. 84 * The assembler also accepts a .proc pseudo-op, which is used by the 85 * peep hole optimizer, whose argument is the type code of the return 86 * value. Since this is difficult to predict and its expected that 87 * assembler code is already optimized, we leave it out. 88 */ 89#define _ENTRY(x) \ 90 _START_ENTRY ; \ 91 .globl CNAME(x) ; \ 92 .type CNAME(x),@function ; \ 93CNAME(x): 94 95#define ENTRY(x) _ENTRY(x) 96#define END(x) .size x, . - x 97 98#endif /* !_MACHINE_ASM_H_ */ 99