PR_SET_VMA(2const) — Linux manual page

PR_SET_VMA(2const)                                    PR_SET_VMA(2const)

NAME

       PR_SET_VMA - set an attribute for virtual memory areas

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_SET_VMA, long attr, unsigned long addr, unsigned long size,
                 const char *_Nullable val);

DESCRIPTION

       Sets an attribute specified in attr for virtual memory areas
       starting from the address specified in addr and spanning the size
       specified in size.  val specifies the value of the attribute to
       be set.

       Note that assigning an attribute to a virtual memory area might
       prevent it from being merged with adjacent virtual memory areas
       due to the difference in that attribute's value.

       Currently, attr must be one of:

       PR_SET_VMA_ANON_NAME
              Set a name for anonymous virtual memory areas.  val should
              be a pointer to a null-terminated string containing the
              name.  The name length including null byte cannot exceed
              80 bytes.  If val is NULL, the name of the appropriate
              anonymous virtual memory areas will be reset.  The name
              can contain only printable ascii characters (isprint(3)),
              except '[', ']', '\', '$', and '`'.

RETURN VALUE

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

ERRORS

       EINVAL attr is not a valid attribute.

       EINVAL addr is an invalid address.

STANDARDS

       Linux.

HISTORY

       Linux 5.17.

SEE ALSO

       prctl(2)

COLOPHON

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-06-15             PR_SET_VMA(2const)

Pages that refer to this page: prctl(2)

---