From: Davide Libenzi <davidel@xmailserver.org>
To: Chris Lattner <sabre@nondot.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [x86] Access off the bottom of stack causes a segfault?
Date: Tue, 14 Oct 2003 11:37:37 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.56.0310141136080.2098@bigblue.dev.mdolabs.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0310141320020.3869-100000@nondot.org>
On Tue, 14 Oct 2003, Chris Lattner wrote:
>
> My compiler is generating accesses off the bottom of the stack (address
> below %esp). Is there some funny kernel interaction that I should be
> aware of with this? I'm periodically getting segfaults.
>
> Example:
>
> int main() {
> int test[4000];
> ...
> return 0;
> }
>
> Generated code:
> .intel_syntax
> ...
> main:
> mov DWORD PTR [%ESP - 16004], %EBP # Save EBP to stack
^^^^^^^^^^^^
Yes, this is the problem (even Windows does that IIRC).
- Davide
next prev parent reply other threads:[~2003-10-14 18:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-14 18:31 [x86] Access off the bottom of stack causes a segfault? Chris Lattner
2003-10-14 18:37 ` Davide Libenzi [this message]
2003-10-14 19:00 ` Chris Lattner
2003-10-14 18:45 ` Davide Libenzi
2003-10-14 19:28 ` Richard B. Johnson
2003-10-14 19:48 ` Chris Lattner
2003-10-17 23:55 ` Jamie Lokier
2003-10-14 20:47 ` Mikael Pettersson
2003-10-14 18:42 ` Brian Gerst
2003-10-14 18:49 ` Chris Lattner
2003-10-14 18:42 ` Petr Vandrovec
2003-10-14 19:02 ` Chris Lattner
2003-10-14 19:18 ` Richard B. Johnson
2003-10-14 20:43 ` H. Peter Anvin
2003-10-17 0:23 ` Eric W. Biederman
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