PR_SET_MM_START_DATA - modify kernel memory map descriptor fields

NAME LIBRARY SYNOPSIS DESCRIPTION RETURN VALUE ERRORS STANDARDS HISTORY SEE ALSO

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.