65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
/* $OpenBSD: DEFS.h,v 1.2 2023/12/10 16:45:52 deraadt Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
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* $NetBSD: SYS.h,v 1.5 2002/06/03 18:30:32 fvdl Exp $
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*/
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#include <machine/asm.h>
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/*
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* We define a hidden alias with the prefix "_libc_" for each global symbol
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* that may be used internally. By referencing _libc_x instead of x, other
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* parts of libc prevent overriding by the application and avoid unnecessary
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* relocations.
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*/
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#define _HIDDEN(x) _libc_##x
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#define _HIDDEN_ALIAS(x,y) \
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STRONG_ALIAS(_HIDDEN(x),y); \
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.hidden _HIDDEN(x)
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#define _HIDDEN_FALIAS(x,y) \
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_HIDDEN_ALIAS(x,y); \
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.type _HIDDEN(x),@function
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/*
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* For functions implemented in ASM that aren't syscalls.
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* END_STRONG(x) Like DEF_STRONG() in C; for standard/reserved C names
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* END_WEAK(x) Like DEF_WEAK() in C; for non-ISO C names
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*/
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#define END_STRONG(x) END(x); _HIDDEN_FALIAS(x,x); END(_HIDDEN(x))
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#define END_WEAK(x) END_STRONG(x); .weak x
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.long label; \
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.long sysno; \
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.popsection;
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