plucky (2) PR_SET_MM.2const.gz

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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)