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#include "lapi/abisize.h"
40
41char *TCID = "mmap15";
42int TST_TOTAL = 1;
43
44#ifdef __ia64__
45# define HIGH_ADDR (void *)(0xa000000000000000UL)
46#else
47# define HIGH_ADDR (void *)(-page_size)
48#endif
49
50static long page_size;
51
52static void setup(void);
53static void cleanup(void);
54
55int main(int ac, char **av)
56{
57	int lc, fd;
58	void *addr;
59
60#ifdef TST_ABI32
61	tst_brkm(TCONF, NULL, "This test is only for 64bit");
62#endif
63
64	tst_parse_opts(ac, av, NULL, NULL);
65
66	setup();
67
68	for (lc = 0; TEST_LOOPING(lc); lc++) {
69		tst_count = 0;
70
71		fd = SAFE_OPEN(cleanup, "testfile", O_RDWR | O_CREAT, 0666);
72
73		/* Attempt to mmap into highmem addr, should get ENOMEM */
74		addr = mmap(HIGH_ADDR, page_size, PROT_READ,
75			    MAP_SHARED | MAP_FIXED, fd, 0);
76		if (addr != MAP_FAILED) {
77			tst_resm(TFAIL, "mmap into high region "
78				 "succeeded unexpectedly");
79			munmap(addr, page_size);
80			close(fd);
81			continue;
82		}
83
84		if (errno != ENOMEM && errno != EINVAL) {
85			tst_resm(TFAIL | TERRNO, "mmap into high region "
86				 "failed unexpectedly");
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	page_size = getpagesize();
106
107	TEST_PAUSE;
108}
109
110static void cleanup(void)
111{
112	tst_rmdir();
113}
114