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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
commit3af6d22bb3850ab2bac67287e3a3d3b0e32868e5 (patch)
tree3ee7a3ec64525911fa865bb984c86d997d855527 /man4/mem.4
parentAdding debian version 6.05.01-1. (diff)
downloadmanpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.tar.xz
manpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.zip
Merging upstream version 6.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--man4/mem.424
1 files changed, 12 insertions, 12 deletions
diff --git a/man4/mem.4 b/man4/mem.4
index 4ccb827..cfaa99c 100644
--- a/man4/mem.4
+++ b/man4/mem.4
@@ -4,7 +4,7 @@
.\" SPDX-License-Identifier: GPL-2.0-or-later
.\"
.\" Modified Sat Jul 24 16:59:10 1993 by Rik Faith (faith@cs.unc.edu)
-.TH mem 4 2022-10-30 "Linux man-pages 6.05.01"
+.TH mem 4 2023-10-31 "Linux man-pages 6.7"
.SH NAME
mem, kmem, port \- system memory, kernel memory and system ports
.SH DESCRIPTION
@@ -12,31 +12,31 @@ mem, kmem, port \- system memory, kernel memory and system ports
is a character device file
that is an image of the main memory of the computer.
It may be used, for example, to examine (and even patch) the system.
-.PP
+.P
Byte addresses in
.I /dev/mem
are interpreted as physical memory addresses.
References to nonexistent locations cause errors to be returned.
-.PP
+.P
Examining and patching is likely to lead to unexpected results
when read-only or write-only bits are present.
-.PP
+.P
Since Linux 2.6.26, and depending on the architecture, the
.B CONFIG_STRICT_DEVMEM
kernel configuration option limits the areas
which can be accessed through this file.
For example: on x86, RAM access is not allowed but accessing
memory-mapped PCI regions is.
-.PP
+.P
It is typically created by:
-.PP
+.P
.in +4n
.EX
mknod \-m 660 /dev/mem c 1 1
chown root:kmem /dev/mem
.EE
.in
-.PP
+.P
The file
.I /dev/kmem
is the same as
@@ -46,23 +46,23 @@ rather than physical memory is accessed.
Since Linux 2.6.26, this file is available only if the
.B CONFIG_DEVKMEM
kernel configuration option is enabled.
-.PP
+.P
It is typically created by:
-.PP
+.P
.in +4n
.EX
mknod \-m 640 /dev/kmem c 1 2
chown root:kmem /dev/kmem
.EE
.in
-.PP
+.P
.I /dev/port
is similar to
.IR /dev/mem ,
but the I/O ports are accessed.
-.PP
+.P
It is typically created by:
-.PP
+.P
.in +4n
.EX
mknod \-m 660 /dev/port c 1 4