Date: Mon, 02 Nov 1998 00:14:08 -0800 From: Mike Smith <mike@smith.net.au> To: Brian Feldman <green@zone.syracuse.net> Cc: current@FreeBSD.ORG Subject: Re: Linux clone() Message-ID: <199811020814.AAA08887@dingo.cdrom.com> In-Reply-To: Your message of "Sun, 01 Nov 1998 23:12:38 EST." <Pine.BSF.4.05.9811012304170.5699-100000@zone.syracuse.net>
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> Okay, guys, I think I've gotten a linux clone() syscall implemented... As
Neat. Wrong list perhaps though. (-emulation)
> of now, I have nothing to test it with :( The only thing I have to try it
> with is MpegTV, and for some really crazy reason:
> linux_clone()->(1569, 1570); child eip=0xf00, esp=0x80ed0b4
> Now come on, passing 0xf00 as the void *fn (really int (*fn)(void *)) is
> pretty damned bogus (but hey, it's not zero, so it turns into the child's
> instruction pointer...) If anyone has any REALY examples of programs to
> test with this, let me know....
First off; what do you get if you trace it on a Linux system? Are you
sure the args are formatted correctly?
> This is a pretty important thing to have,
> when lots more apps use linuxthreads (i.e. StarOffice 5.0).
No kidding.
> Oh, BTW,
> someone tell me if this would be something really terrible to accidentally
> do in kernel space:
> printf("%d %d %#x %#x");
> note no arguments... so far I don't notice any destabilization but I sure
> hope I didn't fudge up the kernel stack!
Nope; that's generally harmless, just prints lots of garbage.
As for test apps; someone ought to be able to build you a trivial
clone() test program on a Linux system.
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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