1 /* $NetBSD: t_syscall.c,v 1.4 2021/01/18 05:44:20 simonb Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Martin Husemann.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: t_syscall.c,v 1.4 2021/01/18 05:44:20 simonb Exp $");
33
34
35 #include <atf-c.h>
36 #include <stdio.h>
37 #include <unistd.h>
38 #include <fcntl.h>
39 #include <err.h>
40 #include <string.h>
41 #include <stdlib.h>
42 #include <sys/mman.h>
43 #include <sys/endian.h>
44 #include <sys/syscall.h>
45
46 #if !defined(_LP64) && BYTE_ORDER == _BIG_ENDIAN
47 #define __SYSCALL_TO_UINTPTR_T(V) ((uintptr_t)((V)>>32))
48 #else
49 #define __SYSCALL_TO_UINTPTR_T(V) ((uintptr_t)(V))
50 #endif
51
52 static const char secrect_data[1024] = {
53 "my secret key\n"
54 };
55
56 #define FILE_NAME "dummy"
57
58 #ifndef _LP64
59 ATF_TC(mmap_syscall);
60
ATF_TC_HEAD(mmap_syscall,tc)61 ATF_TC_HEAD(mmap_syscall, tc)
62 {
63 atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via syscall(2)");
64 }
65
ATF_TC_BODY(mmap_syscall,tc)66 ATF_TC_BODY(mmap_syscall, tc)
67 {
68 int fd;
69 const char *p;
70
71 fd = open(FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
72 ATF_REQUIRE(fd != -1);
73
74 write(fd, secrect_data, sizeof(secrect_data));
75
76 p = (const char *)syscall(SYS_mmap,
77 0, sizeof(secrect_data), PROT_READ, MAP_PRIVATE, fd, 0, 0, 0);
78 ATF_REQUIRE(p != MAP_FAILED);
79
80 ATF_REQUIRE(strcmp(p, secrect_data) == 0);
81 }
82 #endif
83
84 ATF_TC(mmap___syscall);
85
ATF_TC_HEAD(mmap___syscall,tc)86 ATF_TC_HEAD(mmap___syscall, tc)
87 {
88 atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via __syscall(2)");
89 }
90
ATF_TC_BODY(mmap___syscall,tc)91 ATF_TC_BODY(mmap___syscall, tc)
92 {
93 int fd;
94 const char *p;
95
96 fd = open(FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
97 ATF_REQUIRE(fd != -1);
98
99 write(fd, secrect_data, sizeof(secrect_data));
100
101 p = (const char *)__SYSCALL_TO_UINTPTR_T(__syscall(SYS_mmap,
102 0, sizeof(secrect_data), PROT_READ, MAP_PRIVATE, fd,
103 /* pad*/ 0, (off_t)0));
104 ATF_REQUIRE(p != MAP_FAILED);
105
106 ATF_REQUIRE(strcmp(p, secrect_data) == 0);
107 }
108
ATF_TP_ADD_TCS(tp)109 ATF_TP_ADD_TCS(tp)
110 {
111
112 #ifndef _LP64
113 ATF_TP_ADD_TC(tp, mmap_syscall);
114 #endif
115 ATF_TP_ADD_TC(tp, mmap___syscall);
116
117 return atf_no_error();
118 }
119