1/*
2 * Check decoding of get_mempolicy syscall.
3 *
4 * Copyright (c) 2016 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_get_mempolicy
34
35# include <stdio.h>
36# include <unistd.h>
37
38# include "xlat.h"
39# include "xlat/policies.h"
40
41# define MAX_STRLEN 3
42# define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
43		      / (8 * sizeof(long)))
44
45static void
46print_nodes(unsigned long maxnode)
47{
48	unsigned long *const nodemask =
49		tail_alloc(sizeof(*nodemask) * NLONGS(maxnode));
50
51	if (syscall(__NR_get_mempolicy, 0, nodemask, maxnode, 0, 0)) {
52		printf("get_mempolicy(NULL, %p, %lu, NULL, 0) = -1 %s (%m)\n",
53		       nodemask, maxnode, errno2name());
54		return;
55	}
56
57	printf("get_mempolicy(NULL, [");
58
59	unsigned int nlongs = NLONGS(maxnode);
60	unsigned int i;
61	for (i = 0; i < nlongs; ++i) {
62		if (i)
63			fputs(", ", stdout);
64		if (i >= MAX_STRLEN) {
65			fputs("...", stdout);
66			break;
67		}
68		printf("%#0*lx", (int) sizeof(*nodemask) * 2 + 2, nodemask[i]);
69	}
70
71	printf("], %lu, NULL, 0) = 0\n", maxnode);
72}
73
74int
75main(void)
76{
77	long rc;
78
79	if (syscall(__NR_get_mempolicy, 0, 0, 0, 0, 0))
80		perror_msg_and_skip("get_mempolicy");
81	puts("get_mempolicy(NULL, NULL, 0, NULL, 0) = 0");
82
83	int *mode = (void *) 0xdefaced1baddeed2;
84	unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
85	const unsigned long *nodemask = (void *) 0xfacedad3bebefed4ULL;
86	const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
87	const unsigned long flags = -1U;
88	rc = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
89	printf("get_mempolicy(%p, %p, %lu, %#lx, %s|%#lx) = %ld %s (%m)\n",
90	       mode, nodemask, maxnode, addr,
91	       "MPOL_F_NODE|MPOL_F_ADDR",
92	       flags & ~3, rc, errno2name());
93
94	mode = tail_alloc(sizeof(*mode));
95
96	rc = syscall(__NR_get_mempolicy, mode, 0, 0, 0, 0);
97	printf("get_mempolicy([");
98	printxval(policies, (unsigned) *mode, "MPOL_???");
99	printf("], NULL, 0, NULL, 0) = %ld\n", rc);
100
101	*mode = -1;
102	rc = syscall(__NR_get_mempolicy, mode, 0, 0, mode - 1, 2);
103	printf("get_mempolicy([");
104	printxval(policies, (unsigned) *mode, "MPOL_???");
105	printf("], NULL, 0, %p, MPOL_F_ADDR) = %ld\n", mode - 1, rc);
106
107	maxnode = get_page_size() * 8;
108
109	print_nodes(maxnode);
110	print_nodes(maxnode + 1);
111	print_nodes(maxnode + 2);
112
113	maxnode = sizeof(*nodemask) * 8;
114	print_nodes(maxnode - 1);
115	print_nodes(maxnode    );
116	print_nodes(maxnode + 1);
117	print_nodes(maxnode + 2);
118	print_nodes(maxnode * 2 - 1);
119	print_nodes(maxnode * 2    );
120	print_nodes(maxnode * 2 + 1);
121	print_nodes(maxnode * 2 + 2);
122	print_nodes(maxnode * 3 - 1);
123	print_nodes(maxnode * 3    );
124	print_nodes(maxnode * 3 + 1);
125	print_nodes(maxnode * 3 + 2);
126
127	puts("+++ exited with 0 +++");
128	return 0;
129}
130
131#else
132
133SKIP_MAIN_UNDEFINED("__NR_get_mempolicy")
134
135#endif
136