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PR_SET_MM

(2const)

modify kernel memory map descriptor fields

System callsmanpages-dev 6.9.1-1
#include <linux/prctl.h> /* Definition of PR_* constants */ #include <sys/prctl.h> int prctl(PR_SET_MM, long op, ...);

LIBRARY

Standard C library (libc, -lc)

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.

RETURN VALUE

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

ERRORS

op is not a valid value.
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)