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/* SPDX-License-Identifier: GPL-2.0 */
#include <syscall.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef MLOCK_ONFAULT
#define MLOCK_ONFAULT 1
#endif
#ifndef MCL_ONFAULT
#define MCL_ONFAULT (MCL_FUTURE << 1)
#endif
static int mlock2_(void *start, size_t len, int flags)
{
#ifdef __NR_mlock2
return syscall(__NR_mlock2, start, len, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
static FILE *seek_to_smaps_entry(unsigned long addr)
{
FILE *file;
char *line = NULL;
size_t size = 0;
unsigned long start, end;
char perms[5];
unsigned long offset;
char dev[32];
unsigned long inode;
char path[BUFSIZ];
file = fopen("/proc/self/smaps", "r");
if (!file) {
perror("fopen smaps");
_exit(1);
}
while (getline(&line, &size, file) > 0) {
if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n",
&start, &end, perms, &offset, dev, &inode, path) < 6)
goto next;
if (start <= addr && addr < end)
goto out;
next:
free(line);
line = NULL;
size = 0;
}
fclose(file);
file = NULL;
out:
free(line);
return file;
}
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