ipc_sem.c revision c01ad06002f6c15fd0c8807e38e452bb240a1f92 
1/*
2 * Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
7 * Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "defs.h"
34#include "ipc_defs.h"
35
36#include <sys/sem.h>
37
38#include "xlat/semctl_flags.h"
39#include "xlat/semop_flags.h"
40
41static void
42tprint_sembuf(const struct sembuf *sb)
43{
44	tprintf("{%u, %d, ", sb->sem_num, sb->sem_op);
45	printflags(semop_flags, sb->sem_flg, "SEM_???");
46	tprints("}");
47}
48
49static void
50tprint_sembuf_array(struct tcb *tcp, const long addr, const unsigned long count)
51{
52	unsigned long max_count;
53	struct sembuf sb;
54
55	if (abbrev(tcp))
56		max_count = (max_strlen < count) ? max_strlen : count;
57	else
58		max_count = count;
59
60	if (!max_count)
61		printaddr(addr);
62	else if (!umove_or_printaddr(tcp, addr, &sb)) {
63		unsigned long i;
64
65		tprints("[");
66		tprint_sembuf(&sb);
67
68		for (i = 1; i < max_count; ++i) {
69			tprints(", ");
70			if (umove_or_printaddr(tcp, addr + i * sizeof(sb), &sb))
71				break;
72			else
73				tprint_sembuf(&sb);
74		}
75
76		if (i < max_count || max_count < count)
77			tprints(", ...");
78
79		tprints("]");
80	}
81	tprintf(", %lu", count);
82}
83
84SYS_FUNC(semop)
85{
86	tprintf("%lu, ", tcp->u_arg[0]);
87	if (indirect_ipccall(tcp)) {
88		tprint_sembuf_array(tcp, tcp->u_arg[3], tcp->u_arg[1]);
89	} else {
90		tprint_sembuf_array(tcp, tcp->u_arg[1], tcp->u_arg[2]);
91	}
92	return RVAL_DECODED;
93}
94
95SYS_FUNC(semtimedop)
96{
97	tprintf("%lu, ", tcp->u_arg[0]);
98	if (indirect_ipccall(tcp)) {
99		tprint_sembuf_array(tcp, tcp->u_arg[3], tcp->u_arg[1]);
100		tprints(", ");
101#if defined(S390) || defined(S390X)
102		printtv(tcp, tcp->u_arg[2]);
103#else
104		printtv(tcp, tcp->u_arg[4]);
105#endif
106	} else {
107		tprint_sembuf_array(tcp, tcp->u_arg[1], tcp->u_arg[2]);
108		tprints(", ");
109		printtv(tcp, tcp->u_arg[3]);
110	}
111	return RVAL_DECODED;
112}
113
114SYS_FUNC(semget)
115{
116	if (tcp->u_arg[0])
117		tprintf("%#lx", tcp->u_arg[0]);
118	else
119		tprints("IPC_PRIVATE");
120	tprintf(", %lu, ", tcp->u_arg[1]);
121	if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
122		tprints("|");
123	tprintf("%#lo", tcp->u_arg[2] & 0777);
124	return RVAL_DECODED;
125}
126
127SYS_FUNC(semctl)
128{
129	tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
130	PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
131	tprints(", ");
132	if (indirect_ipccall(tcp)) {
133		printnum_ptr(tcp, tcp->u_arg[3]);
134	} else {
135		tprintf("%#lx", tcp->u_arg[3]);
136	}
137	return RVAL_DECODED;
138}
139