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prctl(2): PR_SET_MM: Document new PR_SET_MM_MAP{,_SIZE} helpers 

Signed-off-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Mike Frysinger 2017-02-15 15:14:42 -05:00 committed by Michael Kerrisk
parent a87d0921a7
commit 7e3236a5a0
1 changed files with 28 additions and 0 deletions
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man2/prctl.2
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@ -652,6 +652,34 @@ in a process life time.
Any further attempts will be rejected.
This should help system administrators monitor unusual
symbolic-link transitions over all processes running on a system.
.P
The following options are available since Linux 3.18.
.\" commit f606b77f1a9e362451aca8f81d8f36a3a112139e
.TP
.BR PR_SET_MM_MAP
Provides one-shot access to all the addresses by passing in a
.I struct prctl_mm_map
(as defined in \fI<linux/prctl.h>\fP).
The
.I arg4
argument should provide the size of the struct.
This feature is available only if the kernel is built with the
.BR CONFIG_CHECKPOINT_RESTORE
option enabled.
.TP
.BR PR_SET_MM_MAP_SIZE
Returns the size of the
.I struct prctl_mm_map
the kernel expects.
This allows user space to find a compatible struct.
The
.I arg4
argument should be a pointer to an unsigned int.
This feature is available only if the kernel is built with the
.BR CONFIG_CHECKPOINT_RESTORE
option enabled.
.RE
.TP
.BR PR_MPX_ENABLE_MANAGEMENT ", " PR_MPX_DISABLE_MANAGEMENT " (since Linux 3.19) "