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)

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