From owner-freebsd-current  Tue Mar 10 15:44:13 1998
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To: ken@plutotech.com
Cc: current@FreeBSD.ORG, dyson@FreeBSD.ORG
Subject: Re: problems stripping kernels
In-Reply-To: Your message of "Tue, 10 Mar 1998 11:01:23 -0700 (MST)"
References: <199803101801.LAA15498@panzer.plutotech.com>
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Date: Wed, 11 Mar 1998 00:43:25 +0100
From: Tor Egge <Tor.Egge@idi.ntnu.no>
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> Howdy,
> 
> 	I've noticed a problem stripping kernels since John's changes on
> Saturday went in.  (and it wasn't fixed by version 1.46 of ufs_readwrite.c
> yesterday)
> 

The following patch worked for me as a workaround.  As long as
msync()/munmap() is performed before ftruncate(), there is no
problems with regard to what is 'legal' values for the size fields.


Index: strip.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/strip/strip.c,v
retrieving revision 1.11
diff -u -r1.11 strip.c
--- strip.c	1997/08/12 06:44:57	1.11
+++ strip.c	1998/03/09 22:35:26
@@ -250,12 +250,13 @@
 	 */
 	bcopy(nstrbase, (void *)nsym, len);
 
+	msync((caddr_t) ep, (size_t)sb.st_size, MS_SYNC);
+	munmap((caddr_t)ep, (size_t)sb.st_size);
 	/* Truncate to the current length. */
 	if (ftruncate(fd, (char *)nsym + len - (char *)ep)) {
 		warn("%s", fn);
 		err_val = 1;
 	}
-	munmap((caddr_t)ep, (size_t)sb.st_size);
 }
 
 static void

- Tor Egge

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