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.\" Copyright 2012, Cyrill Gorcunov <gorcunov@openvz.org>
.\" Copyright 2012, 2013, 2015, Michael Kerrisk <mtk.manpages@gmail.com>
.\" Copyright 2024, Alejandro Colomar <alx@kernel.org>
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH PR_SET_MM_MAP 2const 2024-06-01 "Linux man-pages (unreleased)"
.SH NAME
PR_SET_MM_MAP,
PR_SET_MM_MAP_SIZE
\-
modify kernel memory map descriptor fields
.SH LIBRARY
Standard C library
.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.BR "#include <linux/prctl.h>" " /* Definition of " PR_* " constants */"
.B #include <sys/prctl.h>
.P
.B int prctl(PR_SET_MM, PR_SET_MM_MAP,
.BI " struct prctl_mm_map *" map ", unsigned long " size ", 0L);"
.BI "int prctl(PR_SET_MM, PR_SET_MM_MAP_SIZE, unsigned int *" size ", 0L, 0L);"
.fi
.SH DESCRIPTION
.TP
.B PR_SET_MM_MAP
Provides one-shot access to all the addresses modifyable with
.BR PR_SET_MM (2const)
by passing in a
.I struct prctl_mm_map
(as defined in \fI<linux/prctl.h>\fP).
The
.I size
argument should provide the size of the struct.
.TP
.B PR_SET_MM_MAP_SIZE
Returns
(via the
.I size
argument)
the size of the
.I struct prctl_mm_map
the kernel expects.
This allows user space to find a compatible struct.
.P
These features are available only if the kernel is built with the
.B CONFIG_CHECKPOINT_RESTORE
option enabled.
.SH RETURN VALUE
On success,
0 is returned.
On error, \-1 is returned, and
.I errno
is set to indicate the error.
.SH ERRORS
.TP
.B EINVAL
The third argument
is an invalid address.
.SH STANDARDS
Linux.
.SH HISTORY
Linux 3.18.
.\" commit f606b77f1a9e362451aca8f81d8f36a3a112139e
.SH SEE ALSO
.BR prctl (2),
.BR PR_SET_MM (2const),
.BR PR_SET_MM_START_CODE (2const),
.BR PR_SET_MM_END_CODE (2const),
.BR PR_SET_MM_START_DATA (2const),
.BR PR_SET_MM_END_DATA (2const),
.BR PR_SET_MM_START_STACK (2const),
.BR PR_SET_MM_START_BRK (2const),
.BR PR_SET_MM_BRK (2const),
.BR PR_SET_MM_ARG_START (2const),
.BR PR_SET_MM_ARG_END (2const),
.BR PR_SET_MM_ENV_START (2const),
.BR PR_SET_MM_ENV_END (2const),
.BR PR_SET_MM_EXE_FILE (2const)
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