1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
* Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#ifdef HAVE_SYS_SHM_H
# include <sys/shm.h>
#elif defined HAVE_LINUX_SHM_H
# include <linux/shm.h>
#endif
#ifndef SHM_HUGE_SHIFT
# define SHM_HUGE_SHIFT 26
#endif
#ifndef SHM_HUGE_MASK
# define SHM_HUGE_MASK 0x3f
#endif
#include "xlat/shm_resource_flags.h"
#include "xlat/shm_flags.h"
SYS_FUNC(shmget)
{
printxval(ipc_private, (unsigned int) tcp->u_arg[0], NULL);
tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
unsigned int flags = tcp->u_arg[2] & ~0777;
const unsigned int mask = SHM_HUGE_MASK << SHM_HUGE_SHIFT;
const unsigned int hugetlb_value = flags & mask;
flags &= ~mask;
if (flags || !hugetlb_value)
printflags(shm_resource_flags, flags, NULL);
if (hugetlb_value) {
tprintf("%s%u<<",
flags ? "|" : "",
hugetlb_value >> SHM_HUGE_SHIFT);
print_xlat_u(SHM_HUGE_SHIFT);
}
if (flags || hugetlb_value)
tprints("|");
print_numeric_umode_t(tcp->u_arg[2] & 0777);
return RVAL_DECODED;
}
SYS_FUNC(shmat)
{
if (entering(tcp)) {
tprintf("%d, ", (int) tcp->u_arg[0]);
if (indirect_ipccall(tcp)) {
printaddr(tcp->u_arg[3]);
tprints(", ");
printflags(shm_flags, tcp->u_arg[1], "SHM_???");
} else {
printaddr(tcp->u_arg[1]);
tprints(", ");
printflags(shm_flags, tcp->u_arg[2], "SHM_???");
}
return 0;
} else {
if (syserror(tcp))
return 0;
if (indirect_ipccall(tcp)) {
union {
uint64_t r64;
uint32_t r32;
} u;
if (umoven(tcp, tcp->u_arg[2], current_wordsize, &u) < 0)
return RVAL_NONE;
tcp->u_rval = (sizeof(u.r32) == current_wordsize)
? u.r32 : u.r64;
}
return RVAL_HEX;
}
}
SYS_FUNC(shmdt)
{
printaddr(tcp->u_arg[indirect_ipccall(tcp) ? 3 : 0]);
return RVAL_DECODED;
}
|
