NAME¶

PR_SET_MM_START_DATA, PR_SET_MM_END_DATA - modify kernel memory map descriptor fields

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

#include <linux/prctl.h>  /* Definition of PR_* constants */
#include <sys/prctl.h>

int prctl(PR_SET_MM, PR_SET_MM_START_DATA, unsigned long addr, 0L, 0L);
int prctl(PR_SET_MM, PR_SET_MM_END_DATA, unsigned long addr, 0L, 0L);

DESCRIPTION¶

PR_SET_MM_START_DATA

Set the address above which initialized and uninitialized (bss) data are placed. The corresponding memory area must be readable and writable, but not executable or shareable.

PR_SET_MM_END_DATA

Set the address below which initialized and uninitialized (bss) data are placed. The corresponding memory area must be readable and writable, but not executable or shareable.

RETURN VALUE¶

On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.

ERRORS¶

EINVAL

addr is greater than TASK_SIZE (the limit on the size of the user address space for this architecture).

EINVAL

The permissions of the corresponding memory area are not as required.

STANDARDS¶

Linux.

HISTORY¶

Linux 3.3.

SEE ALSO¶

prctl(2)