1 /*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2007 Roland McGrath <roland@redhat.com>
7 * Copyright (c) 2011-2012 Denys Vlasenko <vda.linux@googlemail.com>
8 * Copyright (c) 2010-2015 Dmitry V. Levin <ldv@altlinux.org>
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "defs.h"
35
36 static void
printargv(struct tcb * tcp,long addr)37 printargv(struct tcb *tcp, long addr)
38 {
39 union {
40 unsigned int p32;
41 unsigned long p64;
42 char data[sizeof(long)];
43 } cp;
44 const char *sep;
45 unsigned int n = 0;
46 const unsigned wordsize = current_wordsize;
47
48 cp.p64 = 1;
49 for (sep = ""; !abbrev(tcp) || n < max_strlen / 2; sep = ", ", ++n) {
50 if (umoven_or_printaddr(tcp, addr, wordsize, cp.data))
51 return;
52 if (wordsize == 4)
53 cp.p64 = cp.p32;
54 if (cp.p64 == 0)
55 break;
56 tprints(sep);
57 printstr(tcp, cp.p64, -1);
58 addr += wordsize;
59 }
60 if (cp.p64)
61 tprintf("%s...", sep);
62 }
63
64 static void
printargc(const char * fmt,struct tcb * tcp,long addr)65 printargc(const char *fmt, struct tcb *tcp, long addr)
66 {
67 int count;
68 char *cp = NULL;
69
70 for (count = 0; !umoven(tcp, addr, current_wordsize, &cp) && cp; count++) {
71 addr += current_wordsize;
72 }
73 tprintf(fmt, count, count == 1 ? "" : "s");
74 }
75
76 static void
decode_execve(struct tcb * tcp,const unsigned int index)77 decode_execve(struct tcb *tcp, const unsigned int index)
78 {
79 printpath(tcp, tcp->u_arg[index + 0]);
80 tprints(", ");
81
82 if (!tcp->u_arg[index + 1] || !verbose(tcp))
83 printaddr(tcp->u_arg[index + 1]);
84 else {
85 tprints("[");
86 printargv(tcp, tcp->u_arg[index + 1]);
87 tprints("]");
88 }
89 tprints(", ");
90
91 if (!tcp->u_arg[index + 2] || !verbose(tcp))
92 printaddr(tcp->u_arg[index + 2]);
93 else if (abbrev(tcp))
94 printargc("[/* %d var%s */]", tcp, tcp->u_arg[index + 2]);
95 else {
96 tprints("[");
97 printargv(tcp, tcp->u_arg[index + 2]);
98 tprints("]");
99 }
100 }
101
SYS_FUNC(execve)102 SYS_FUNC(execve)
103 {
104 decode_execve(tcp, 0);
105
106 return RVAL_DECODED;
107 }
108
SYS_FUNC(execveat)109 SYS_FUNC(execveat)
110 {
111 print_dirfd(tcp, tcp->u_arg[0]);
112 decode_execve(tcp, 1);
113 tprints(", ");
114 printflags(at_flags, tcp->u_arg[4], "AT_???");
115
116 return RVAL_DECODED;
117 }
118
119 #if defined(SPARC) || defined(SPARC64)
SYS_FUNC(execv)120 SYS_FUNC(execv)
121 {
122 printpath(tcp, tcp->u_arg[0]);
123 tprints(", ");
124 if (!tcp->u_arg[1] || !verbose(tcp))
125 printaddr(tcp->u_arg[1]);
126 else {
127 tprints("[");
128 printargv(tcp, tcp->u_arg[1]);
129 tprints("]");
130 }
131
132 return RVAL_DECODED;
133 }
134 #endif /* SPARC || SPARC64 */
135