NAME¶

PR_SET_MM_START_CODE, PR_SET_MM_END_CODE - 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_CODE, unsigned long addr, 0L, 0L);
int prctl(PR_SET_MM, PR_SET_MM_END_CODE, unsigned long addr, 0L, 0L);

DESCRIPTION¶

PR_SET_MM_START_CODE

Set the address above which the program text can run. The corresponding memory area must be readable and executable, but not writable or shareable (see mprotect(2) and mmap(2) for more information).

PR_SET_MM_END_CODE

Set the address below which the program text can run. The corresponding memory area must be readable and executable, but not writable 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)