1 /*
2 * Copyright (c) International Business Machines Corp., 2004
3 * Written by Robbie Williamson
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Test Description: Test that a normal page cannot be mapped into a high
22 * memory region.
23 */
24
25 #include <sys/types.h>
26 #include <sys/mman.h>
27 #include <sys/mount.h>
28 #include <sys/stat.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <signal.h>
32 #include <stdint.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
37 #include "test.h"
38 #include "safe_macros.h"
39
40 char *TCID = "mmap15";
41 int TST_TOTAL = 1;
42
43 #ifdef __ia64__
44 # define HIGH_ADDR (void *)(0xa000000000000000UL)
45 #else
46 # define HIGH_ADDR (void *)(-page_size)
47 #endif
48
49 static long page_size;
50
51 static void setup(void);
52 static void cleanup(void);
53
main(int ac,char ** av)54 int main(int ac, char **av)
55 {
56 int lc, fd;
57 void *addr;
58
59 #if __WORDSIZE == 32
60 tst_brkm(TCONF, NULL, "This test is only for 64bit");
61 #endif
62
63 tst_parse_opts(ac, av, NULL, NULL);
64
65 setup();
66
67 for (lc = 0; TEST_LOOPING(lc); lc++) {
68 tst_count = 0;
69
70 fd = SAFE_OPEN(cleanup, "testfile", O_RDWR | O_CREAT, 0666);
71
72 /* Attempt to mmap into highmem addr, should get ENOMEM */
73 addr = mmap(HIGH_ADDR, page_size, PROT_READ,
74 MAP_SHARED | MAP_FIXED, fd, 0);
75 if (addr != MAP_FAILED) {
76 tst_resm(TFAIL, "mmap into high region "
77 "succeeded unexpectedly");
78 munmap(addr, page_size);
79 close(fd);
80 continue;
81 }
82
83 if (errno != ENOMEM && errno != EINVAL) {
84 tst_resm(TFAIL | TERRNO, "mmap into high region "
85 "failed unexpectedly");
86 } else {
87 tst_resm(TPASS | TERRNO, "mmap into high region "
88 "failed as expected");
89 }
90
91 SAFE_CLOSE(cleanup, fd);
92 }
93
94 cleanup();
95 tst_exit();
96 }
97
setup(void)98 static void setup(void)
99 {
100 tst_require_root();
101
102 tst_tmpdir();
103
104 page_size = getpagesize();
105
106 TEST_PAUSE;
107 }
108
cleanup(void)109 static void cleanup(void)
110 {
111 tst_rmdir();
112 }
113