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Re: function arguments offset computation with -fomit-frame-pointer
On Wednesday 09 July 2003 17:16, Peter Barada wrote:
> > However, there must be still a bug somewhere because a Linux kernel
> >compiled with -fomit-frame-pointer crashes with bus errors in a place
> >I cannot reach with the debugger. I don't have strong evidence on
> > this, but I believe one function gets its parameters from the wrong
> > sp offset.
> Check to see if you have the following change:
Yes, I do have it. I've already picked it up from your gcc 3.2.3 patches.
> I found this necessary to fix a problem with -fomit-frame-pointer on
> ColdFire where gcc had an off-by-four bug when accessing parameters.
But does -fomit-frame-pointer work on your gcc 3.3 tree? My guess is
that it didn't because of a mismatch between computations done at
prologue and epilogue emission time.
Hmmm... interesting thread! Thank you.
It's sad I can't try compiling with -O0 because the Linux kernel
absolutely requires inlining.
// Bernardo Innocenti - Develer S.r.l., R&D dept.
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