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
40char *TCID = "mmap15";
41int TST_TOTAL = 1;
42
43#ifdef __ia64__
44# define HIGH_ADDR (void *)(0xa000000000000000UL)
45#else
46# define HIGH_ADDR (void *)(1L << 53)
47#endif
48
49static long map_sz;
50
51static void setup(void);
52static void cleanup(void);
53
54int 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, map_sz, 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, map_sz);
79			close(fd);
80			continue;
81		}
82
83		if (errno != ENOMEM) {
84			tst_resm(TFAIL | TERRNO, "mmap into high region "
85				 "failed unexpectedly - expect "
86				 "errno=ENOMEM, got");
87		} else {
88			tst_resm(TPASS | TERRNO, "mmap into high region "
89				 "failed as expected");
90		}
91
92		SAFE_CLOSE(cleanup, fd);
93	}
94
95	cleanup();
96	tst_exit();
97}
98
99static void setup(void)
100{
101	tst_require_root();
102
103	tst_tmpdir();
104
105	map_sz = getpagesize();
106
107	TEST_PAUSE;
108}
109
110static void cleanup(void)
111{
112	tst_rmdir();
113}
114