1 /*
2 * Check decoding of SPARC-specific kern_features syscall.
3 *
4 * Copyright (c) 2018 The strace developers.
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 #include "raw_syscall.h"
35 #include "scno.h"
36
37 #if defined __NR_kern_features && defined raw_syscall_0
38
39 # include <errno.h>
40 # include <stdio.h>
41 # include <stdlib.h>
42 # include <unistd.h>
43
44 static void
test_kern_features(unsigned int num)45 test_kern_features(unsigned int num)
46 {
47 /* The expected return codes, as enforced by fault injection */
48 static struct {
49 kernel_ulong_t ret;
50 const char *str;
51 } checks[] = {
52 { 0, NULL },
53 { 1, "KERN_FEATURE_MIXED_MODE_STACK" },
54 { 2, "0x2" },
55 { 0x7ffffffe, "0x7ffffffe" },
56 { 0x7fffffff, "KERN_FEATURE_MIXED_MODE_STACK|0x7ffffffe" },
57 { (kernel_ulong_t) 0xbadc0deddeadfaceULL,
58 sizeof(kernel_ulong_t) == 8 ?
59 "0xbadc0deddeadface" : "0xdeadface" },
60 { (kernel_ulong_t) -1ULL,
61 sizeof(kernel_ulong_t) == 8 ?
62 "KERN_FEATURE_MIXED_MODE_STACK|0xfffffffffffffffe" :
63 "KERN_FEATURE_MIXED_MODE_STACK|0xfffffffe" },
64 };
65
66 kernel_ulong_t err = 0;
67 kernel_ulong_t rc = raw_syscall_0(__NR_kern_features, &err);
68
69 if (err) {
70 errno = rc;
71 printf("kern_features() = %s\n", sprintrc(-1));
72 return;
73 }
74
75 printf("kern_features() = %#llx", (unsigned long long) rc);
76
77 if (num < ARRAY_SIZE(checks)) {
78 if (rc != checks[num].ret)
79 error_msg_and_fail("Expected return value (%llx) "
80 "doesn't match expected one (%#llx)",
81 (unsigned long long) rc,
82 (unsigned long long) checks[num].ret);
83
84 if (checks[num].str)
85 printf(" (%s)", checks[num].str);
86
87 printf(" (INJECTED)");
88 } else if (rc) {
89 printf(" (");
90
91 if (rc & 1)
92 printf("KERN_FEATURE_MIXED_MODE_STACK");
93
94 if (rc & ~1ULL) {
95 if (rc & 1)
96 printf("|");
97
98 printf("%#llx", rc & ~1ULL);
99 }
100
101 printf(")");
102 }
103
104 puts("");
105 }
106
107 int
main(int ac,char ** av)108 main(int ac, char **av)
109 {
110 test_kern_features(ac > 1 ? atoi(av[1]) : -1);
111
112 puts("+++ exited with 0 +++");
113 return 0;
114 }
115
116 #else
117
118 SKIP_MAIN_UNDEFINED("__NR_kern_features && raw_syscall_0");
119
120 #endif
121