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