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      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 
     61 ATF_TC_HEAD(mmap_syscall, tc)
     62 {
     63 	atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via syscall(2)");
     64 }
     65 
     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 
     86 ATF_TC_HEAD(mmap___syscall, tc)
     87 {
     88 	atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via __syscall(2)");
     89 }
     90 
     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 
    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