Messages in this thread | | | Date | Wed, 25 Mar 2009 11:37:46 -0700 | From | Tim Bird <> | Subject | Re: Anyone working on ftrace function graph support on ARM? |
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Russell King - ARM Linux wrote: > On Wed, Mar 25, 2009 at 06:05:33PM +0100, Uwe Kleine-K�nig wrote: >> On Wed, Mar 25, 2009 at 09:34:07AM -0700, Tim Bird wrote: >>> Russell King - ARM Linux wrote: >>>> As pointed out in my previous mail, identifying where on the stack the >>>> return address is stored is only possible for OABI with frame pointers. >>>> >>>> EABI will probably be possible with the stack unwinding code, but it >>>> probably won't be cheap. The EABI unwinder is scheduled for merging >>>> during the present now-open merge window. >> EABI with frame pointers should work, too, shouldn't it? > > Yes, as I said at the top of my reply dated Wed, 25 Mar 2009 09:57:51 +0000
It turns out you can't use -pg and -fomit-frame-pointers at the same time. At least, my gcc complains about this: $ make arm-sony-linux-gnueabi-dev-gcc -g -pg -fomit-frame-pointer -o hello hello.c arm-sony-linux-gnueabi-dev-gcc: -pg and -fomit-frame-pointer are incompatible make: *** [hello] Error 1
============================= Tim Bird Architecture Group Chair, CE Linux Forum Senior Staff Engineer, Sony Corporation of America =============================
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