diff options
Diffstat (limited to 'share/man/man3/end.3')
-rw-r--r-- | share/man/man3/end.3 | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/share/man/man3/end.3 b/share/man/man3/end.3 new file mode 100644 index 000000000000..42e73fe586a4 --- /dev/null +++ b/share/man/man3/end.3 @@ -0,0 +1,83 @@ +.\" Copyright (c) 1986 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)end.3 6.4 (Berkeley) 1/24/94 +.\" $FreeBSD$ +.\" +.Dd August 28, 2000 +.Dt END 3 +.Os +.Sh NAME +.Nm end , +.Nm etext , +.Nm edata +.Nd end boundaries of image segments +.Sh SYNOPSIS +.Vt extern end ; +.Vt extern etext ; +.Vt extern edata ; +.Sh DESCRIPTION +The globals +.Va end , etext +and +.Va edata +are program segment end addresses. +.Pp +.Va etext +is the first address after the end of the text segment. +.Pp +.Va edata +is the first address after the end of the initialized data segment. +.Pp +.Va end +is the first address after the end of the data segment +.Pq Tn BSS +when the program is loaded. +Use the +.Xr sbrk 2 +.\".Fn sbrk 0 +system call with zero as its argument to find the current end of the +data segment. +.Sh SEE ALSO +.Xr sbrk 2 , +.Xr malloc 3 , +.Xr a.out 5 +.Sh HISTORY +An +.Nm +manual page appeared in +.At v6 . +.Sh BUGS +Traditionally, no variable existed that pointed to the start of the +text segment because the text segment always started at address zero. +Although it is no longer valid to make this assumption, no +variable similar to the ones documented above exists to point to the +start of the text segment. |