Module Name: src
Committed By: christos
Date: Fri Feb 27 16:18:00 UTC 2015
Modified Files:
src/lib/libc/sys: mmap.2
Log Message:
Document SIGBUS per ToG.
To generate a diff of this commit:
cvs rdiff -u -r1.47 -r1.48 src/lib/libc/sys/mmap.2
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/sys/mmap.2
diff -u src/lib/libc/sys/mmap.2:1.47 src/lib/libc/sys/mmap.2:1.48
--- src/lib/libc/sys/mmap.2:1.47 Thu Jan 5 10:19:52 2012
+++ src/lib/libc/sys/mmap.2 Fri Feb 27 11:18:00 2015
@@ -1,4 +1,4 @@
-.\" $NetBSD: mmap.2,v 1.47 2012/01/05 15:19:52 reinoud Exp $
+.\" $NetBSD: mmap.2,v 1.48 2015/02/27 16:18:00 christos Exp $
.\"
.\" Copyright (c) 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@@ -29,7 +29,7 @@
.\"
.\" @(#)mmap.2 8.4 (Berkeley) 5/11/95
.\"
-.Dd December 20, 2011
+.Dd February 27, 2015
.Dt MMAP 2
.Os
.Sh NAME
@@ -138,6 +138,14 @@ regions, and must be specified as \-1.
The mapped memory will be zero filled.
.It Dv MAP_FILE
Mapped from a regular file or character-special device memory.
+Read accesses beyond the end of of the file or device but less
+than the current page size will be zero-filled.
+Write accesses beyond the end of the file or device but less
+than the current page size will not affect the file or device.
+References beyond the end of file that are beyond the current
+page size will result in the delivery of
+.Dv SIGBUS
+signal.
.It Dv MAP_FIXED
Do not permit the system to select a different address than the one
specified.
