PR_SET_MM(2const) — Linux manual page

PR_SET_MM(2const)                                      PR_SET_MM(2const)

NAME

       PR_SET_MM - 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, long op, ...);

DESCRIPTION

       Modify certain kernel memory map descriptor fields of the calling
       process.  Usually these fields are set by the kernel and dynamic
       loader (see ld.so(8) for more information) and a regular
       application should not use this feature.  However, there are
       cases, such as self-modifying programs, where a program might
       find it useful to change its own memory map.

       The calling process must have the CAP_SYS_RESOURCE capability.
       The value in op is one of the options below.

       PR_SET_MM_START_CODE
       PR_SET_MM_END_CODE
       PR_SET_MM_START_DATA
       PR_SET_MM_END_DATA
       PR_SET_MM_START_STACK
       PR_SET_MM_START_BRK
       PR_SET_MM_BRK
       PR_SET_MM_ARG_START
       PR_SET_MM_ARG_END
       PR_SET_MM_ENV_START
       PR_SET_MM_ENV_END
       PR_SET_MM_AUXV
       PR_SET_MM_EXE_FILE
       PR_SET_MM_MAP
       PR_SET_MM_MAP_SIZE

RETURN VALUE

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

ERRORS

       EINVAL op is not a valid value.

       EPERM  The caller does not have the CAP_SYS_RESOURCE capability.

STANDARDS

       Linux.

HISTORY

       Linux 3.3.

       Before Linux 3.10, this feature is available only if the kernel
       is built with the CONFIG_CHECKPOINT_RESTORE option enabled.

SEE ALSO

       prctl(2), PR_SET_MM_START_CODE(2const),
       PR_SET_MM_END_CODE(2const), PR_SET_MM_START_DATA(2const),
       PR_SET_MM_END_DATA(2const), PR_SET_MM_START_STACK(2const),
       PR_SET_MM_START_BRK(2const), PR_SET_MM_BRK(2const),
       PR_SET_MM_ARG_START(2const), PR_SET_MM_ARG_END(2const),
       PR_SET_MM_ENV_START(2const), PR_SET_MM_ENV_END(2const),
       PR_SET_MM_EXE_FILE(2const), PR_SET_MM_MAP(2const),
       PR_SET_MM_MAP_SIZE(2const)

COLOPHON

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

Pages that refer to this page: prctl(2), PR_SET_MM_ARG_START(2const), PR_SET_MM_AUXV(2const), PR_SET_MM_BRK(2const), PR_SET_MM_EXE_FILE(2const), PR_SET_MM_MAP(2const), PR_SET_MM_START_BRK(2const), PR_SET_MM_START_STACK(2const)

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