Re: [x86] Access off the bottom of stack causes a segfault?

[Davide Libenzi]

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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