xref: /minix3/external/bsd/tcpdump/dist/machdep.c (revision b636d99d91c3d54204248f643c14627405d4afd1)
1*b636d99dSDavid van Moolenbroek /*
2*b636d99dSDavid van Moolenbroek  * Copyright (c) 1996, 1997
3*b636d99dSDavid van Moolenbroek  *	The Regents of the University of California.  All rights reserved.
4*b636d99dSDavid van Moolenbroek  *
5*b636d99dSDavid van Moolenbroek  * Redistribution and use in source and binary forms, with or without
6*b636d99dSDavid van Moolenbroek  * modification, are permitted provided that: (1) source code distributions
7*b636d99dSDavid van Moolenbroek  * retain the above copyright notice and this paragraph in its entirety, (2)
8*b636d99dSDavid van Moolenbroek  * distributions including binary code include the above copyright notice and
9*b636d99dSDavid van Moolenbroek  * this paragraph in its entirety in the documentation or other materials
10*b636d99dSDavid van Moolenbroek  * provided with the distribution, and (3) all advertising materials mentioning
11*b636d99dSDavid van Moolenbroek  * features or use of this software display the following acknowledgement:
12*b636d99dSDavid van Moolenbroek  * ``This product includes software developed by the University of California,
13*b636d99dSDavid van Moolenbroek  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14*b636d99dSDavid van Moolenbroek  * the University nor the names of its contributors may be used to endorse
15*b636d99dSDavid van Moolenbroek  * or promote products derived from this software without specific prior
16*b636d99dSDavid van Moolenbroek  * written permission.
17*b636d99dSDavid van Moolenbroek  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18*b636d99dSDavid van Moolenbroek  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19*b636d99dSDavid van Moolenbroek  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20*b636d99dSDavid van Moolenbroek  */
21*b636d99dSDavid van Moolenbroek 
22*b636d99dSDavid van Moolenbroek #include <sys/cdefs.h>
23*b636d99dSDavid van Moolenbroek #ifndef lint
24*b636d99dSDavid van Moolenbroek __RCSID("$NetBSD: machdep.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
25*b636d99dSDavid van Moolenbroek #endif
26*b636d99dSDavid van Moolenbroek 
27*b636d99dSDavid van Moolenbroek #ifdef HAVE_CONFIG_H
28*b636d99dSDavid van Moolenbroek #include "config.h"
29*b636d99dSDavid van Moolenbroek #endif
30*b636d99dSDavid van Moolenbroek 
31*b636d99dSDavid van Moolenbroek /*
32*b636d99dSDavid van Moolenbroek  * XXX - all we need, on platforms other than DEC OSF/1 (a/k/a Digital UNIX,
33*b636d99dSDavid van Moolenbroek  * a/k/a Tru64 UNIX), is "size_t", which is a standard C type; what do we
34*b636d99dSDavid van Moolenbroek  * need to do to get it defined?  This is clearly wrong, as we shouldn't
35*b636d99dSDavid van Moolenbroek  * have to include UNIX or Windows system header files to get it.
36*b636d99dSDavid van Moolenbroek  */
37*b636d99dSDavid van Moolenbroek #include <tcpdump-stdinc.h>
38*b636d99dSDavid van Moolenbroek 
39*b636d99dSDavid van Moolenbroek #ifndef HAVE___ATTRIBUTE__
40*b636d99dSDavid van Moolenbroek #define __attribute__(x)
41*b636d99dSDavid van Moolenbroek #endif /* HAVE___ATTRIBUTE__ */
42*b636d99dSDavid van Moolenbroek 
43*b636d99dSDavid van Moolenbroek #ifdef __osf__
44*b636d99dSDavid van Moolenbroek #include <sys/sysinfo.h>
45*b636d99dSDavid van Moolenbroek #include <sys/proc.h>
46*b636d99dSDavid van Moolenbroek 
47*b636d99dSDavid van Moolenbroek #if !defined(HAVE_SNPRINTF)
48*b636d99dSDavid van Moolenbroek int snprintf(char *, size_t, const char *, ...)
49*b636d99dSDavid van Moolenbroek #ifdef __ATTRIBUTE___FORMAT_OK
50*b636d99dSDavid van Moolenbroek      __attribute__((format(printf, 3, 4)))
51*b636d99dSDavid van Moolenbroek #endif /* __ATTRIBUTE___FORMAT_OK */
52*b636d99dSDavid van Moolenbroek      ;
53*b636d99dSDavid van Moolenbroek #endif /* !defined(HAVE_SNPRINTF) */
54*b636d99dSDavid van Moolenbroek #endif /* __osf__ */
55*b636d99dSDavid van Moolenbroek 
56*b636d99dSDavid van Moolenbroek #include "machdep.h"
57*b636d99dSDavid van Moolenbroek 
58*b636d99dSDavid van Moolenbroek /*
59*b636d99dSDavid van Moolenbroek  * On platforms where the CPU doesn't support unaligned loads, force
60*b636d99dSDavid van Moolenbroek  * unaligned accesses to abort with SIGBUS, rather than being fixed
61*b636d99dSDavid van Moolenbroek  * up (slowly) by the OS kernel; on those platforms, misaligned accesses
62*b636d99dSDavid van Moolenbroek  * are bugs, and we want tcpdump to crash so that the bugs are reported.
63*b636d99dSDavid van Moolenbroek  *
64*b636d99dSDavid van Moolenbroek  * The only OS on which this is necessary is DEC OSF/1^W^WDigital
65*b636d99dSDavid van Moolenbroek  * UNIX^W^WTru64 UNIX.
66*b636d99dSDavid van Moolenbroek  */
67*b636d99dSDavid van Moolenbroek int
abort_on_misalignment(char * ebuf _U_,size_t ebufsiz _U_)68*b636d99dSDavid van Moolenbroek abort_on_misalignment(char *ebuf _U_, size_t ebufsiz _U_)
69*b636d99dSDavid van Moolenbroek {
70*b636d99dSDavid van Moolenbroek #ifdef __osf__
71*b636d99dSDavid van Moolenbroek 	static int buf[2] = { SSIN_UACPROC, UAC_SIGBUS };
72*b636d99dSDavid van Moolenbroek 
73*b636d99dSDavid van Moolenbroek 	if (setsysinfo(SSI_NVPAIRS, (caddr_t)buf, 1, 0, 0) < 0) {
74*b636d99dSDavid van Moolenbroek 		(void)snprintf(ebuf, ebufsiz, "setsysinfo: errno %d", errno);
75*b636d99dSDavid van Moolenbroek 		return (-1);
76*b636d99dSDavid van Moolenbroek 	}
77*b636d99dSDavid van Moolenbroek #endif
78*b636d99dSDavid van Moolenbroek 	return (0);
79*b636d99dSDavid van Moolenbroek }
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