[Bug target/10395] [x86] vector types are incorrectly aligned causing crash in multi-threaded apps or when using in main, plus other times

[uros at kss-loka dot si]

------- Additional Comments From uros at kss-loka dot si  2004-12-20 13:16 -------
(In reply to comment #21)
> > The default pthread library in RedHat 8.0 does align stack properly, as I am 
> > able to trigger the bug. Testcase shows: 
>  
> Uros, did you mean "does *not* align the stack properly"? If so, I would 
> say yes, we should close the PR as WONTFIX, since we can't do anything 
> about it. 

Ouch... RH 8.0 does _NOT_ align stack properly.

However, on second thought, is it worth to add some kind of -mforce-stack-align
parameter to gcc? Or maybe an attribute to the function? This way, one could add
a stack alignment code, similar to main() stack alignment:

        pushl   %ebp
        movl %esp, %ebp
        subl $8, %esp
        andl $-16, %esp     <- this
        subl $16, %esp


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10395