48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/* $OpenBSD: SYS.h,v 1.3 2023/04/25 04:11:10 deraadt Exp $ */
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/*
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* Copyright (c) 2002,2004 Dale Rahn
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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*/
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#include <sys/syscall.h>
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#include <machine/asm.h>
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#define DL_SYSCALL(n) \
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.global __CONCAT(_dl_,n) ;\
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.type __CONCAT(_dl_,n), @function ;\
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.align 16,0xcc ;\
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__CONCAT(_dl_,n): ;\
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endbr64 ;\
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RETGUARD_SETUP(_dl_##n, r11) ;\
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RETGUARD_PUSH(r11) ;\
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movl $(__CONCAT(SYS_,n)), %eax ;\
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movq %rcx, %r10 ;\
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syscall ;\
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jnc 1f ;\
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neg %rax ;\
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1: RETGUARD_POP(r11) ;\
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RETGUARD_CHECK(_dl_##n, r11) ;\
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ret
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