From: "Russ Cox" <rsc@swtch.com>
To: 9fans@9fans.net
Subject: Re: [9fans] _tos puzzle
Date: Fri, 9 May 2008 09:08:44 -0400 [thread overview]
Message-ID: <20080509131200.4A20F1E8C5C@holo.morphisms.net> (raw)
In-Reply-To: <7A069CFA-C55D-4B5F-99B3-B1E82EC0D4BF@kix.in>
> I did, and to my surprise, AX is 0, even though I set it properly in
> the loader. It appears as if Linux is setting AX to 0 sometime after
> the loader finishes, but before the executable begins. All other
> registers, however, are preserved (eip being the most important).
The zero you see in AX is probably the return value from exec.
Russ
next prev parent reply other threads:[~2008-05-09 13:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-08 16:18 Anant Narayanan
2008-05-08 16:41 ` Russ Cox
2008-05-08 17:13 ` Anant Narayanan
2008-05-08 17:24 ` Russ Cox
2008-05-08 17:40 ` Steven Vormwald
2008-05-08 19:19 ` Anant Narayanan
2008-05-08 20:33 ` Russ Cox
2008-05-09 5:30 ` Anant Narayanan
2008-05-09 13:08 ` Russ Cox [this message]
2008-05-08 17:50 ` Charles Forsyth
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