2 * Check decoding of get_mempolicy syscall.
4 * Copyright (c) 2016-2018 Dmitry V. Levin <ldv@altlinux.org>
7 * SPDX-License-Identifier: GPL-2.0-or-later
11 #include <asm/unistd.h>
13 #ifdef __NR_get_mempolicy
19 # include "xlat/policies.h"
22 # define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
26 print_nodes(unsigned long maxnode)
28 unsigned long *const nodemask =
29 tail_alloc(sizeof(*nodemask) * NLONGS(maxnode));
31 if (syscall(__NR_get_mempolicy, 0, nodemask, maxnode, 0, 0)) {
32 printf("get_mempolicy(NULL, %p, %lu, NULL, 0) = -1 %s (%m)\n",
33 nodemask, maxnode, errno2name());
37 printf("get_mempolicy(NULL, [");
39 unsigned int nlongs = NLONGS(maxnode);
41 for (i = 0; i < nlongs; ++i) {
44 if (i >= MAX_STRLEN) {
48 printf("%#0*lx", (int) sizeof(*nodemask) * 2 + 2, nodemask[i]);
51 printf("], %lu, NULL, 0) = 0\n", maxnode);
59 if (syscall(__NR_get_mempolicy, 0, 0, 0, 0, 0))
60 perror_msg_and_skip("get_mempolicy");
61 puts("get_mempolicy(NULL, NULL, 0, NULL, 0) = 0");
63 int *mode = (void *) 0xdefaced1baddeed2;
64 unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
65 const unsigned long *nodemask = (void *) 0xfacedad3bebefed4ULL;
66 const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
67 const unsigned long flags = -1U;
68 rc = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
69 printf("get_mempolicy(%p, %p, %lu, %#lx, %s|%#lx) = %ld %s (%m)\n",
70 mode, nodemask, maxnode, addr,
71 "MPOL_F_NODE|MPOL_F_ADDR",
72 flags & ~3, rc, errno2name());
74 mode = tail_alloc(sizeof(*mode));
76 rc = syscall(__NR_get_mempolicy, mode, 0, 0, 0, 0);
77 printf("get_mempolicy([");
78 printxval(policies, (unsigned) *mode, "MPOL_???");
79 printf("], NULL, 0, NULL, 0) = %ld\n", rc);
82 rc = syscall(__NR_get_mempolicy, mode, 0, 0, mode - 1, 2);
83 printf("get_mempolicy([");
84 printxval(policies, (unsigned) *mode, "MPOL_???");
85 printf("], NULL, 0, %p, MPOL_F_ADDR) = %ld\n", mode - 1, rc);
87 maxnode = get_page_size() * 8;
90 print_nodes(maxnode + 1);
91 print_nodes(maxnode + 2);
93 maxnode = sizeof(*nodemask) * 8;
94 print_nodes(maxnode - 1);
95 print_nodes(maxnode );
96 print_nodes(maxnode + 1);
97 print_nodes(maxnode + 2);
98 print_nodes(maxnode * 2 - 1);
99 print_nodes(maxnode * 2 );
100 print_nodes(maxnode * 2 + 1);
101 print_nodes(maxnode * 2 + 2);
102 print_nodes(maxnode * 3 - 1);
103 print_nodes(maxnode * 3 );
104 print_nodes(maxnode * 3 + 1);
105 print_nodes(maxnode * 3 + 2);
107 puts("+++ exited with 0 +++");
113 SKIP_MAIN_UNDEFINED("__NR_get_mempolicy")