1 /*
2 * Check decoding of remap_file_pages syscall.
3 *
4 * Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32 #include <asm/unistd.h>
33
34 #ifdef __NR_remap_file_pages
35
36 # include <stdio.h>
37 # include <stdint.h>
38 # include <unistd.h>
39 # include <linux/mman.h>
40
41 static const char *errstr;
42
43 static long
k_remap_file_pages(const kernel_ulong_t addr,const kernel_ulong_t size,const kernel_ulong_t prot,const kernel_ulong_t pgoff,const kernel_ulong_t flags)44 k_remap_file_pages(const kernel_ulong_t addr,
45 const kernel_ulong_t size,
46 const kernel_ulong_t prot,
47 const kernel_ulong_t pgoff,
48 const kernel_ulong_t flags)
49 {
50 const long rc = syscall(__NR_remap_file_pages,
51 addr, size, prot, pgoff, flags);
52 errstr = sprintrc(rc);
53 return rc;
54 }
55
56 int
main(void)57 main(void)
58 {
59 kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
60 kernel_ulong_t size = (kernel_ulong_t) 0xdefaced1bad2f00dULL;
61 kernel_ulong_t prot = PROT_READ|PROT_WRITE|PROT_EXEC;
62 kernel_ulong_t pgoff = (kernel_ulong_t) 0xcaf3babebad4deedULL;
63 kernel_ulong_t flags = MAP_PRIVATE|MAP_ANONYMOUS;
64
65 k_remap_file_pages(addr, size, prot, pgoff, flags);
66 printf("remap_file_pages(%#jx, %ju, %s, %ju, %s) = %s\n",
67 (uintmax_t) addr, (uintmax_t) size,
68 "PROT_READ|PROT_WRITE|PROT_EXEC",
69 (uintmax_t) pgoff, "MAP_PRIVATE|MAP_ANONYMOUS", errstr);
70
71 #ifdef MAP_HUGETLB
72 # ifndef MAP_HUGE_2MB
73 # ifndef MAP_HUGE_SHIFT
74 # define MAP_HUGE_SHIFT 26
75 # endif
76 # define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
77 # endif /* !MAP_HUGE_2MB */
78 addr = (kernel_ulong_t) 0xfacefeeddeadf00dULL;
79 size = (kernel_ulong_t) 0xdefaced1bad2beefULL;
80 prot = (kernel_ulong_t) 0xdefaced00000000ULL | PROT_NONE;
81 flags = MAP_TYPE | MAP_FIXED | MAP_NORESERVE | MAP_HUGETLB | MAP_HUGE_2MB;
82
83 k_remap_file_pages(addr, size, prot, pgoff, flags);
84 printf("remap_file_pages(%#jx, %ju, %s, %ju"
85 /*
86 * HP PA-RISC is the only architecture that has MAP_TYPE defined to 0x3, which
87 * is also used for MAP_SHARED_VALIDATE since Linux commit v4.15-rc1~71^2^2~23.
88 */
89 # ifdef __hppa__
90 ", MAP_SHARED_VALIDATE"
91 # else
92 ", 0xf /* MAP_??? */"
93 # endif
94 "|MAP_FIXED|MAP_NORESERVE|MAP_HUGETLB|21<<MAP_HUGE_SHIFT)"
95 " = %s\n",
96 (uintmax_t) addr, (uintmax_t) size,
97 prot == PROT_NONE ? "PROT_NONE" :
98 "0xdefaced00000000 /* PROT_??? */",
99 (uintmax_t) pgoff, errstr);
100 #endif /* MAP_HUGETLB */
101
102 puts("+++ exited with 0 +++");
103 return 0;
104 }
105
106 #else
107
108 SKIP_MAIN_UNDEFINED("__NR_remap_file_pages")
109
110 #endif
111