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
7static int mlock2_(void *start, size_t len, int flags)
8{
9#ifdef __NR_mlock2
10 return syscall(__NR_mlock2, start, len, flags);
11#else
12 errno = ENOSYS;
13 return -1;
14#endif
15}
16
17static FILE *seek_to_smaps_entry(unsigned long addr)
18{
19 FILE *file;
20 char *line = NULL;
21 size_t size = 0;
22 unsigned long start, end;
23 char perms[5];
24 unsigned long offset;
25 char dev[32];
26 unsigned long inode;
27 char path[BUFSIZ];
28
29 file = fopen("/proc/self/smaps", "r");
30 if (!file) {
31 perror("fopen smaps");
32 _exit(1);
33 }
34
35 while (getline(&line, &size, file) > 0) {
36 if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n",
37 &start, &end, perms, &offset, dev, &inode, path) < 6)
38 goto next;
39
40 if (start <= addr && addr < end)
41 goto out;
42
43next:
44 free(line);
45 line = NULL;
46 size = 0;
47 }
48
49 fclose(file);
50 file = NULL;
51
52out:
53 free(line);
54 return file;
55}