Re: BUG: GCC-4.4.x changes the function frame on some functions

[Jeff Law]

On 11/19/09 12:50, H. Peter Anvin wrote:
> Calling the profiler immediately at the entry point is clearly the more
> sane option.  It means the ABI is well-defined, stable, and independent
> of what the actual function contents are.  It means that ABI isn't the
> normal C ABI (the __fentry__ function would have to preserve all
> registers), but that's fine...
>    
Note there are targets (even some old x86 variants) that required the 
profiling calls to occur after the prologue.  Unfortunately, nobody 
documented *why* that  was the case.   Sigh.

Jeff
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