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#define _XOPEN_SOURCE 600
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <unistd.h>
26#include <sys/mman.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/wait.h>
30#include <fcntl.h>
31#include <string.h>
32#include <errno.h>
33#include "posixtest.h"
34
35int main(void)
36{
37	char tmpfname[256];
38	long page_size;
39	long total_size;
40
41	void *illegal_addr;
42	void *pa;
43	size_t size;
44	int fd, saved_errno;
45
46	page_size = sysconf(_SC_PAGE_SIZE);
47	total_size = page_size;
48	size = total_size;
49
50	/* Create tmp file */
51	snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_9_1_%d", getpid());
52	unlink(tmpfname);
53	fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
54	if (fd == -1) {
55		printf("Error at open(): %s\n", strerror(errno));
56		return PTS_UNRESOLVED;
57	}
58	unlink(tmpfname);
59	if (ftruncate(fd, total_size) == -1) {
60		printf("Error at ftruncate(): %s\n", strerror(errno));
61		return PTS_UNRESOLVED;
62	}
63
64	/* Map the file for the first time, to get a legal address, pa */
65	pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
66
67	if ((unsigned long)pa % page_size) {
68		printf("pa is not multiple of page_size\n");
69		illegal_addr = pa;
70	} else {
71		printf("pa is a multiple of page_size\n");
72		illegal_addr = pa + 1;
73	}
74
75	munmap(pa, size);
76
77	/* Mmap again using the illegal address, setting MAP_FIXED */
78	pa = mmap(illegal_addr, size, PROT_READ | PROT_WRITE, MAP_FIXED, fd, 0);
79
80	saved_errno = errno;
81
82	close(fd);
83	munmap(pa, size);
84
85	if (pa == MAP_FAILED && saved_errno == EINVAL) {
86		printf("Test PASSED\n");
87		return PTS_PASS;
88	}
89
90	printf("Test FAILED, mmap with MAP_FIXED did not get EINVAL"
91	       " when 'addr' is illegal\n");
92	return PTS_FAIL;
93}
94