1 /*
2 * Copyright (c) 2002, Intel Corporation. All rights reserved.
3 * Copyright (c) 2012, Cyril Hrubis <chrubis@suse.cz>
4 *
5 * This file is licensed under the GPL license. For the full content
6 * of this license, see the COPYING file at the top level of this
7 * source tree.
8 *
9 * If MAP_FIXED is set,
10 * mmap() may return MAP_FAILED and set errno to [EINVAL].
11 *
12 * [EINVAL] The addr argument (if MAP_FIXED was specified) or off is not a
13 * multiple of the page size as returned by sysconf(), or is considered invalid
14 * by the implementation.
15 *
16 * Test Steps:
17 * 1. Set 'addr' as an illegal address, which is not a multiple of page size;
18 * 2. Call mmap() and get EINVAL;
19 */
20
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <unistd.h>
25 #include <sys/mman.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/wait.h>
29 #include <fcntl.h>
30 #include <string.h>
31 #include <errno.h>
32
33 #include "posixtest.h"
34 #include "tempfile.h"
35
main(void)36 int main(void)
37 {
38 char tmpfname[PATH_MAX];
39 long page_size;
40 long total_size;
41
42 void *illegal_addr;
43 void *pa;
44 size_t size;
45 int fd, saved_errno;
46
47 page_size = sysconf(_SC_PAGE_SIZE);
48 total_size = page_size;
49 size = total_size;
50
51 /* Create tmp file */
52 PTS_GET_TMP_FILENAME(tmpfname, "pts_mmap_9_1");
53 unlink(tmpfname);
54 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
55 if (fd == -1) {
56 printf("Error at open(): %s\n", strerror(errno));
57 return PTS_UNRESOLVED;
58 }
59 unlink(tmpfname);
60 if (ftruncate(fd, total_size) == -1) {
61 printf("Error at ftruncate(): %s\n", strerror(errno));
62 return PTS_UNRESOLVED;
63 }
64
65 /* Map the file for the first time, to get a legal address, pa */
66 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
67
68 if ((unsigned long)pa % page_size) {
69 printf("pa is not multiple of page_size\n");
70 illegal_addr = pa;
71 } else {
72 printf("pa is a multiple of page_size\n");
73 illegal_addr = pa + 1;
74 }
75
76 munmap(pa, size);
77
78 /* Mmap again using the illegal address, setting MAP_FIXED */
79 pa = mmap(illegal_addr, size, PROT_READ | PROT_WRITE, MAP_FIXED, fd, 0);
80
81 saved_errno = errno;
82
83 close(fd);
84 munmap(pa, size);
85
86 if (pa == MAP_FAILED && saved_errno == EINVAL) {
87 printf("Test PASSED\n");
88 return PTS_PASS;
89 }
90
91 printf("Test FAILED, mmap with MAP_FIXED did not get EINVAL"
92 " when 'addr' is illegal\n");
93 return PTS_FAIL;
94 }
95