PR_SET_MM_START_BRK(2const) - Linux manual page (original) (raw)

PRSETMMSTARTBRK(2const) PRSETMMSTARTBRK(2const)

NAME top

   PR_SET_MM_START_BRK - modify kernel memory map descriptor fields

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#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 top

   Set the address above which the program heap can be expanded with
   [brk(2)](../man2/brk.2.html) 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)](../man2/setrlimit.2.html)).

RETURN VALUE top

   On success, 0 is returned.  On error, -1 is returned, and _[errno](../man3/errno.3.html)_ is
   set to indicate the error.

ERRORS top

   **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 top

   Linux.

HISTORY top

   Linux 3.3.

SEE ALSO top

   [prctl(2)](../man2/prctl.2.html), [PR_SET_MM(2const)](../man2/PR%5FSET%5FMM.2const.html)

COLOPHON top

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Linux man-pages 6.10 2024-07-23 PRSETMMSTARTBRK(2const)

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