[Bug 1001959] ARM call-graph profiling

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001959

Ilija Kocho [ÐÐÐÑÐ ÐÐÑÐ] <ilijak@siva.com.mk> changed:

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                 CC|                            |ilijak@siva.com.mk

--- Comment #3 from Ilija Kocho [ÐÐÐÑÐ ÐÐÑÐ] <ilijak@siva.com.mk> ---
(In reply to comment #2)
> (In reply to comment #1)
> 
> > Just for my education (should have asked in bug 1001954 a week ago): When
> > using hardware FP, do we need to also put FPU registers?
> 
> Ilija, by inspection, we know that the mcount functions do not use any FP
> registers. These functions call __profile_mcount() which is self-contained
> and does not perform any floating point calculations. So there is no
> possibility that function arguments passed in FP registers will be modified
> within the call to mcount() or __gnu_mcount_nc() and therefore no need for
> the mcount functions to save/restore FP registers.

Many thanks John.

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