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https://github.com/the-tcpdump-group/tcpdump.git
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75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/*
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* Copyright (c) 1996, 1997
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* The Regents of the University of California. 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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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* XXX - all we need, on platforms other than DEC OSF/1 (a/k/a Digital UNIX,
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* a/k/a Tru64 UNIX), is "size_t", which is a standard C type; what do we
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* need to do to get it defined? This is clearly wrong, as we shouldn't
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* have to include UNIX or Windows system header files to get it.
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*/
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#include <netdissect-stdinc.h>
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#ifndef HAVE___ATTRIBUTE__
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#define __attribute__(x)
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#endif /* HAVE___ATTRIBUTE__ */
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#ifdef __osf__
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#include <sys/sysinfo.h>
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#include <sys/proc.h>
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#if !defined(HAVE_SNPRINTF)
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int snprintf(char *, size_t, const char *, ...)
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#ifdef __ATTRIBUTE___FORMAT_OK
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__attribute__((format(printf, 3, 4)))
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#endif /* __ATTRIBUTE___FORMAT_OK */
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;
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#endif /* !defined(HAVE_SNPRINTF) */
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#endif /* __osf__ */
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#include "machdep.h"
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/*
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* On platforms where the CPU doesn't support unaligned loads, force
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* unaligned accesses to abort with SIGBUS, rather than being fixed
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* up (slowly) by the OS kernel; on those platforms, misaligned accesses
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* are bugs, and we want tcpdump to crash so that the bugs are reported.
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*
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* The only OS on which this is necessary is DEC OSF/1^W^WDigital
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* UNIX^W^WTru64 UNIX.
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*/
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int
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abort_on_misalignment(char *ebuf _U_, size_t ebufsiz _U_)
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{
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#ifdef __osf__
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static int buf[2] = { SSIN_UACPROC, UAC_SIGBUS };
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if (setsysinfo(SSI_NVPAIRS, (caddr_t)buf, 1, 0, 0) < 0) {
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(void)snprintf(ebuf, ebufsiz, "setsysinfo: errno %d", errno);
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return (-1);
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}
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#endif
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return (0);
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}
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