PR_SET_MM_START_BRK(2const) — Linux manual page

PR_SET_MM_START_BRK(2const)                  PR_SET_MM_START_BRK(2const)

NAME

       PR_SET_MM_START_BRK - 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_BRK, unsigned long addr, 0L, 0L);

DESCRIPTION

       Set the address above which the program heap can be expanded with
       brk(2) call.

       The address must be greater than the ending address of the
       current program data segment.  In addition, the combined size of
       the resulting heap and the data segment can't exceed the
       RLIMIT_DATA resource limit (see setrlimit(2)).

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 addr is less than or equal to the end of the data segment
              or specifies a value that would cause the RLIMIT_DATA
              resource limit to be exceeded.

STANDARDS

       Linux.

HISTORY

       Linux 3.3.

SEE ALSO

       prctl(2), PR_SET_MM(2const)

COLOPHON

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

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

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