PR_SET_MM_START_CODE(2const)

NAME

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

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.

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.