PR_SET_MM_START_CODE, PR_SET_MM_END_CODE - modify kernel memory map descriptor fields

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.

Errors

EINVALaddr 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.

History

       Linux 3.3.

Library

       Standard C library (libc, -lc)

Name

       PR_SET_MM_START_CODE, PR_SET_MM_END_CODE - modify kernel memory map descriptor fields

Return Value

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

Standards

       Linux.

Synopsis

#include<linux/prctl.h>  /* Definition of PR_* constants */
       #include<sys/prctl.h>intprctl(PR_SET_MM,PR_SET_MM_START_CODE,unsignedlongaddr,0L,0L);intprctl(PR_SET_MM,PR_SET_MM_END_CODE,unsignedlongaddr,0L,0L);