From: Steven Rostedt <[EMAIL PROTECTED]> Date: Wed, 14 May 2008 23:49:44 -0400
> +#ifdef CONFIG_FTRACE > +#ifdef CONFIG_DYNAMIC_FTRACE > +_GLOBAL(mcount) > +_GLOBAL(_mcount) > + stwu r1,-48(r1) > + stw r3, 12(r1) > + stw r4, 16(r1) > + stw r5, 20(r1) > + stw r6, 24(r1) > + mflr r3 > + stw r7, 28(r1) > + mfcr r5 > + stw r8, 32(r1) > + stw r9, 36(r1) > + stw r10,40(r1) > + stw r3, 44(r1) > + stw r5, 8(r1) Yikes, that's really expensive. Can't you do a tail call and let the function you end up calling do all the callee-saved register pops onto the stack? That's what I did on sparc. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
