1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <syscall.h>
3 #include <errno.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <asm-generic/unistd.h>
7
mlock2_(void * start,size_t len,int flags)8 static int mlock2_(void *start, size_t len, int flags)
9 {
10 return syscall(__NR_mlock2, start, len, flags);
11 }
12
seek_to_smaps_entry(unsigned long addr)13 static FILE *seek_to_smaps_entry(unsigned long addr)
14 {
15 FILE *file;
16 char *line = NULL;
17 size_t size = 0;
18 unsigned long start, end;
19 char perms[5];
20 unsigned long offset;
21 char dev[32];
22 unsigned long inode;
23 char path[BUFSIZ];
24
25 file = fopen("/proc/self/smaps", "r");
26 if (!file)
27 ksft_exit_fail_msg("fopen smaps: %s\n", strerror(errno));
28
29 while (getline(&line, &size, file) > 0) {
30 if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n",
31 &start, &end, perms, &offset, dev, &inode, path) < 6)
32 goto next;
33
34 if (start <= addr && addr < end)
35 goto out;
36
37 next:
38 free(line);
39 line = NULL;
40 size = 0;
41 }
42
43 fclose(file);
44 file = NULL;
45
46 out:
47 free(line);
48 return file;
49 }
50