PR_SET_MM_START_DATA(2const) — Linux manual page

PR_SET_MM_START_DATA(2const)                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)

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.

SEE ALSO

       prctl(2)

COLOPHON

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Linux man-pages 6.9.1          2024-06-01   PR_SET_MM_START_DATA(2const)

Pages that refer to this page: PR_SET_MM(2const), PR_SET_MM_MAP(2const)

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