Date: Mon, 11 Mar 1996 23:12:34 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-current@FreeBSD.org (FreeBSD-current users) Subject: Re: system() broken while mmap()ing something Message-ID: <199603112212.XAA00295@uriah.heep.sax.de> In-Reply-To: <no.id> from "j" at Mar 11, 96 10:22:06 pm
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Following up to myself...
I've just tested David's program on my machine.
> I've attached a test program that does demonstrate a problem. The program
> isn't what I originally had in mind. This one mmaps the BIOS, and in three
> phases it "writes" to it, and reads back the result. Since the BIOS is
> read-only, mismatches should occur in each phase, however on FreeBSD-current,
> the last phase (after a system("/bin/ls > /tmp/l")) reports no mismatches.
> On FreeBSD-2.0.5, mismatches are correctly reported at each phase.
The results for me are:
kernel version David's program XServer w/ Xkb enabled
runs okay? doesn't crash system?
Mar 9, 1996 No. No.
Feb 3, 1996 Yes. No.
Mar, 1995
(GENERIC 2.0.5?) Yes. Yes.
So, the test program only seems to show the most evil behaviour.
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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