Re: [x86] Access off the bottom of stack causes a segfault?
From: Davide Libenzi (davidel_at_xmailserver.org)
Date: 10/14/03
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Date: Tue, 14 Oct 2003 11:37:37 -0700 (PDT) To: Chris Lattner <sabre@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
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