PR_SET_MM_START_DATA(2const)

NAME

PR_SET_MM_START_DATA, PR_SET_MM_END_DATA - modify kernel memory map descriptor fields

LIBRARY

Standard C library (libc, -lc)

#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);

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.

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

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.

Linux.

Linux 3.3.