asm.h revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90 35 * from: FreeBSD: src/sys/i386/include/asm.h,v 1.7 2000/01/25 36 * $FreeBSD: stable/11/sys/sparc64/include/asm.h 330897 2018-03-14 03:19:51Z eadler $ 37 */ 38 39#ifndef _MACHINE_ASM_H_ 40#define _MACHINE_ASM_H_ 41 42#define __ASM__ 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 _ALIGN_TEXT .align 32 75 76#define _START_ENTRY \ 77 .text ; \ 78 _ALIGN_TEXT 79 80/* 81 * Define function entry and alternate entry points. 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 92#define _ALTENTRY(x) \ 93 .globl CNAME(x) ; \ 94 .type CNAME(x),@function ; \ 95CNAME(x): 96 97#define _ENTRY(x) \ 98 _START_ENTRY ; \ 99 .globl CNAME(x) ; \ 100 .type CNAME(x),@function ; \ 101CNAME(x): 102 103#define ALTENTRY(x) _ALTENTRY(x) 104#define ENTRY(x) _ENTRY(x) 105#define END(x) .size x, . - x 106 107/* 108 * WEAK_REFERENCE(): create a weak reference alias from sym. 109 * The macro is not a general asm macro that takes arbitrary names, 110 * but one that takes only C names. It does the non-null name 111 * translation inside the macro. 112 */ 113#define WEAK_REFERENCE(sym, alias) \ 114 .weak CNAME(alias); \ 115 .equ CNAME(alias),CNAME(sym) 116 117/* 118 * Kernel RCS ID tag and copyright macros 119 */ 120 121#undef __FBSDID 122#if !defined(lint) && !defined(STRIP_FBSDID) 123#define __FBSDID(s) .ident s 124#else 125#define __FBSDID(s) /* nothing */ 126#endif /* not lint and not STRIP_FBSDID */ 127 128#endif /* !_MACHINE_ASM_H_ */ 129