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Document SIGBUS per ToG.

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christos 2015-02-27 16:18:00 +00:00
parent 19331afb8e
commit f5804ec983
1 changed files with 10 additions and 2 deletions
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12
lib/libc/sys/mmap.2
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@ -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.