tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
8static int mlock2_(void *start, size_t len, int flags)
9{
10 return syscall(__NR_mlock2, start, len, flags);
11}
12
13static 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
37next:
38 free(line);
39 line = NULL;
40 size = 0;
41 }
42
43 fclose(file);
44 file = NULL;
45
46out:
47 free(line);
48 return file;
49}