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 pro-
grams, 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)
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