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 * const tcp,kernel_ulong_t addr)37 printargv(struct tcb *const tcp, kernel_ulong_t addr)
38 {
39 if (!addr || !verbose(tcp)) {
40 printaddr(addr);
41 return;
42 }
43
44 const char *const start_sep = "[";
45 const char *sep = start_sep;
46 const unsigned int wordsize = current_wordsize;
47 unsigned int n;
48
49 for (n = 0; addr; sep = ", ", addr += wordsize, ++n) {
50 union {
51 unsigned int p32;
52 kernel_ulong_t p64;
53 char data[sizeof(kernel_ulong_t)];
54 } cp;
55
56 if (umoven(tcp, addr, wordsize, cp.data)) {
57 if (sep == start_sep)
58 printaddr(addr);
59 else
60 tprints(", ???]");
61 return;
62 }
63 if (!(wordsize < sizeof(cp.p64) ? cp.p32 : cp.p64)) {
64 if (sep == start_sep)
65 tprints(start_sep);
66 break;
67 }
68 if (abbrev(tcp) && n >= max_strlen) {
69 tprintf("%s...", sep);
70 break;
71 }
72 tprints(sep);
73 printstr(tcp, wordsize < sizeof(cp.p64) ? cp.p32 : cp.p64);
74 }
75 tprints("]");
76 }
77
78 static void
printargc(struct tcb * const tcp,kernel_ulong_t addr)79 printargc(struct tcb *const tcp, kernel_ulong_t addr)
80 {
81 if (!addr || !verbose(tcp)) {
82 printaddr(addr);
83 return;
84 }
85
86 bool unterminated = false;
87 unsigned int count = 0;
88 char *cp = NULL;
89
90 for (; addr; addr += current_wordsize, ++count) {
91 if (umoven(tcp, addr, current_wordsize, &cp)) {
92 if (count) {
93 unterminated = true;
94 break;
95 }
96 printaddr(addr);
97 return;
98 }
99 if (!cp)
100 break;
101 }
102 tprintf("[/* %u var%s%s */]",
103 count, count == 1 ? "" : "s",
104 unterminated ? ", unterminated" : "");
105 }
106
107 static void
decode_execve(struct tcb * tcp,const unsigned int index)108 decode_execve(struct tcb *tcp, const unsigned int index)
109 {
110 printpath(tcp, tcp->u_arg[index + 0]);
111 tprints(", ");
112
113 printargv(tcp, tcp->u_arg[index + 1]);
114 tprints(", ");
115
116 (abbrev(tcp) ? printargc : printargv) (tcp, tcp->u_arg[index + 2]);
117 }
118
SYS_FUNC(execve)119 SYS_FUNC(execve)
120 {
121 decode_execve(tcp, 0);
122
123 return RVAL_DECODED;
124 }
125
SYS_FUNC(execveat)126 SYS_FUNC(execveat)
127 {
128 print_dirfd(tcp, tcp->u_arg[0]);
129 decode_execve(tcp, 1);
130 tprints(", ");
131 printflags(at_flags, tcp->u_arg[4], "AT_???");
132
133 return RVAL_DECODED;
134 }
135
136 #if defined(SPARC) || defined(SPARC64)
SYS_FUNC(execv)137 SYS_FUNC(execv)
138 {
139 printpath(tcp, tcp->u_arg[0]);
140 tprints(", ");
141 printargv(tcp, tcp->u_arg[1]);
142
143 return RVAL_DECODED;
144 }
145 #endif /* SPARC || SPARC64 */
146