On Thu, Apr 29, 2010 at 11:02:47AM +1000, Benjamin Herrenschmidt wrote: > From a quick test it appears that this only works with -m64, not -m32. > Alan is that correct ?
Yes. > Any chance you can fix that in future gcc versions ? No need really. 32-bit _mcount calls happen before the prologue anyway. > > In fact if we are careful when switching to the new mcount ABI and don't > > rely on the store of r0, we could probably optimise this even further in a > > future gcc and remove the store completely. mcount would be 2 instructions: > > > > mflr r0 > > bl 8 <.foo+0x8> Yeah. Also, I should have used a different name for this mcount from the standard 64-bit mcount. -- Alan Modra Australia Development Lab, IBM _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
