1 /* $OpenBSD: DEFS.h,v 1.1 2021/04/29 18:39:53 drahn Exp $ */ 2 /*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 34 * $NetBSD: SYS.h,v 1.5 2002/06/03 18:30:32 fvdl Exp $ 35 */ 36 37 #include <machine/asm.h> 38 39 /* 40 * We define a hidden alias with the prefix "_libc_" for each global symbol 41 * that may be used internally. By referencing _libc_x instead of x, other 42 * parts of libc prevent overriding by the application and avoid unnecessary 43 * relocations. 44 */ 45 #define _HIDDEN(x) _libc_##x 46 #define _HIDDEN_ALIAS(x,y) \ 47 STRONG_ALIAS(_HIDDEN(x),y); \ 48 .hidden _HIDDEN(x) 49 #define _HIDDEN_FALIAS(x,y) \ 50 _HIDDEN_ALIAS(x,y); \ 51 .type _HIDDEN(x),@function 52 53 /* 54 * For functions implemented in ASM that aren't syscalls. 55 * END_STRONG(x) Like DEF_STRONG() in C; for standard/reserved C names 56 * END_WEAK(x) Like DEF_WEAK() in C; for non-ISO C names 57 */ 58 #define END_STRONG(x) END(x); _HIDDEN_FALIAS(x,x); END(_HIDDEN(x)) 59 #define END_WEAK(x) END_STRONG(x); .weak x 60 61