1 /*
2 * Check decoding of pkey_mprotect 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 #include <asm/unistd.h>
32 #include "scno.h"
33
34 #ifdef __NR_pkey_mprotect
35
36 # include <stdio.h>
37 # include <unistd.h>
38 # include <sys/mman.h>
39
40 const char *
sprintptr(kernel_ulong_t ptr)41 sprintptr(kernel_ulong_t ptr)
42 {
43 static char buf[sizeof(ptr) * 2 + sizeof("0x")];
44
45 if (ptr)
46 snprintf(buf, sizeof(buf), "%#llx", (unsigned long long) ptr);
47 else
48 return "NULL";
49
50 return buf;
51 }
52
53 int
main(void)54 main(void)
55 {
56 static const kernel_ulong_t ptrs[] = {
57 0,
58 (kernel_ulong_t) 0xfacebeef00000000ULL,
59 (kernel_ulong_t) 0xbadc0dedda7a1057ULL,
60 };
61 static const kernel_ulong_t sizes[] = {
62 0,
63 (kernel_ulong_t) 0xfacebeef00000000ULL,
64 (kernel_ulong_t) 0xfedcba9876543210ULL,
65 (kernel_ulong_t) 0x123456789abcdef0ULL,
66 (kernel_ulong_t) 0xbadc0dedda7a1057ULL,
67 };
68 static const struct {
69 kernel_ulong_t val;
70 const char *str;
71 } prots[] = {
72 { ARG_STR(PROT_READ) },
73 /* For now, only 0x0300001f are used */
74 { (kernel_ulong_t) 0xdeadfeed00ca7500ULL,
75 sizeof(kernel_ulong_t) > sizeof(int) ?
76 "0xdeadfeed00ca7500 /* PROT_??? */" :
77 "0xca7500 /* PROT_??? */" },
78 { ARG_STR(PROT_READ|PROT_WRITE|0xface00) },
79 };
80 static const kernel_ulong_t pkeys[] = {
81 0,
82 -1LL,
83 (kernel_ulong_t) 0xface1e55,
84 (kernel_ulong_t) 0xbadc0ded00000001,
85 };
86
87 long rc;
88 unsigned int i;
89 unsigned int j;
90 unsigned int k;
91 unsigned int l;
92
93 for (i = 0; i < ARRAY_SIZE(ptrs); i++) {
94 for (j = 0; j < ARRAY_SIZE(sizes); j++) {
95 for (k = 0; k < ARRAY_SIZE(prots); k++) {
96 for (l = 0; l < ARRAY_SIZE(pkeys); l++) {
97 rc = syscall(__NR_pkey_mprotect,
98 ptrs[i], sizes[j],
99 prots[k].val, pkeys[l]);
100 printf("pkey_mprotect(%s, %llu, %s, %d)"
101 " = %s\n",
102 sprintptr(ptrs[i]),
103 (unsigned long long) sizes[j],
104 prots[k].str, (int) pkeys[l],
105 sprintrc(rc));
106 }
107 }
108 }
109 }
110
111 puts("+++ exited with 0 +++");
112
113 return 0;
114 }
115
116 #else
117
118 SKIP_MAIN_UNDEFINED("__NR_pkey_mprotect");
119
120 #endif
121