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PR_SET_MM_START_DATA(2const) — Linux manual page

PR_SET_MM_START_DATA(2const)PR_SET_MM_START_DATA(2const)

NAME        top

       PR_SET_MM_START_DATA, PR_SET_MM_END_DATA - modify kernel memory       map descriptor fields

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <linux/prctl.h>/* Definition ofPR_*constants */#include <sys/prctl.h>int prctl(PR_SET_MM, PR_SET_MM_START_DATA, unsigned longaddr, 0L, 0L);int prctl(PR_SET_MM, PR_SET_MM_END_DATA, unsigned longaddr, 0L, 0L);

DESCRIPTION        top

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        top

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

ERRORS        top

EINVALaddr is greater thanTASK_SIZE(the limit on the size of              the user address space for this architecture).EINVALThe permissions of the corresponding memory area are not as              required.

STANDARDS        top

       Linux.

HISTORY        top

       Linux 3.3.

SEE ALSO        top

prctl(2)

COLOPHON        top

       This page is part of theman-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-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  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 isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17PR_SET_MM_START_DATA(2const)

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

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