1 /*
2 * Check decoding of lookup_dcookie syscall.
3 *
4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31
32 #include <asm/unistd.h>
33
34 #ifdef __NR_lookup_dcookie
35
36 # include <inttypes.h>
37 # include <limits.h>
38 # include <stdio.h>
39 # include <unistd.h>
40
41 static void
do_lookup_cookie(uint64_t cookie,char * buf,kernel_ulong_t len)42 do_lookup_cookie(uint64_t cookie, char *buf, kernel_ulong_t len)
43 {
44 long rc;
45 const char *errstr;
46
47 # if (LONG_MAX > INT_MAX) \
48 || (defined __x86_64__ && defined __ILP32__) \
49 || defined LINUX_MIPSN32
50 rc = syscall(__NR_lookup_dcookie, cookie, buf, len);
51 # else
52 rc = syscall(__NR_lookup_dcookie, LL_VAL_TO_PAIR(cookie), buf, len);
53 # endif
54
55 errstr = sprintrc(rc);
56 printf("lookup_dcookie(%" PRIu64 ", ", cookie);
57
58 /* Here, we trust successful return code */
59 if ((rc >= 0) && (rc < (long) INT_MAX)) {
60 printf("%.*s, ", (int) rc, buf);
61 } else {
62 if (buf != NULL)
63 printf("%p, ", buf);
64 else
65 printf("NULL, ");
66 }
67
68 printf("%" PRIu64 ") = %s\n", (uint64_t) len, errstr);
69 }
70
71 int
main(void)72 main(void)
73 {
74 enum { BUF_SIZE = 4096 };
75
76 static const uint64_t bogus_cookie =
77 (uint64_t) 0xf157feeddeadfaceULL;
78 static const kernel_ulong_t bogus_len =
79 (kernel_ulong_t) 0xbadc0dedda7a1057ULL;
80
81 char *buf = tail_alloc(BUF_SIZE);
82
83 do_lookup_cookie(0, NULL, 0);
84 do_lookup_cookie(bogus_cookie, buf + BUF_SIZE, bogus_len);
85 do_lookup_cookie(bogus_cookie, buf, BUF_SIZE);
86
87 puts("+++ exited with 0 +++");
88
89 return 0;
90 }
91
92 #else
93
94 SKIP_MAIN_UNDEFINED("__NR_lookup_dcookie");
95
96 #endif
97