From: Arjan van de Ven <arjanv@redhat.com>
To: Felix von Leitner <felix-kernel@fefe.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: sysenter on x86
Date: 12 Apr 2003 16:15:27 +0200 [thread overview]
Message-ID: <1050156926.1449.2.camel@laptop.fenrus.com> (raw)
In-Reply-To: <20030412135457.GB19869@codeblau.de>
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On Sat, 2003-04-12 at 15:54, Felix von Leitner wrote:
> I just added sysenter support for linux-2.5 on x86 to the diet libc, but
> I noted that the original patch said user space should jump to
> 0xfffff000, which segfaults. Jumping to 0xffffe000 works.
>
> I suggest adding a comment somewhere in the kernel about the proper
> calling convention, because the glibc code is frankly not readable in
> this regard.
you HAVE to use the location as specified with the AT_SYSINFO elf flag.
The kernel is free to move this address around between builds, as long
as AT_SYSINFO gives the address for the location.
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next prev parent reply other threads:[~2003-04-12 14:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-12 13:54 sysenter on x86 Felix von Leitner
2003-04-12 14:15 ` Arjan van de Ven [this message]
2003-04-14 18:14 ` H. Peter Anvin
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