On Mon, 2015-11-23 at 13:54 +0530, Anshuman Khandual wrote: > On 11/21/2015 11:38 AM, Rashmica Gupta wrote:
> > It is common practice with powerpc to use 'rN' to refer to register 'N'. > > However > > when using the pt_regs_offset table we have to use 'gprN'. > > > > So add aliases such that both 'rN' and 'gprN' can be used. > > > > For example, we can currently do: > > $ su - > > $ echo "p:probe/sys_fchownat .sys_fchownat %gpr3:s32 +0(%gpr4):string > > %gpr5:s32 > > %gpr6:s32 %gpr7:s32" > /sys/kernel/debug/tracing/kprobe_events > > $ echo 1 > /sys/kernel/debug/tracing/events/probe/sys_fchownat/enable > > $ touch /tmp/foo > > $ chown root /tmp/foo > > $ echo 0 > /sys/kernel/debug/tracing/events/enable > > $ cat /sys/kernel/debug/tracing/trace > > chown-5040 [001] d... 24800.047211: sys_fchownat: > > (.SyS_fchownat+0x0/0x190) arg1=-100 arg2="foo" arg3=0 arg4=-1 arg5=0 > > > > Instead we'd like to be able to use: > > $ echo "p:probe/sys_fchownat sys_fchownat %r3:s32 +0(%r4):string %r5:s32 > > %r6:s32 %r7:s32" > /sys/kernel/debug/tracing/kprobe_events > > This makes sense and works for me on a LE guest. Just that the symbol > should not have the "." before it. Yeah that's probably my fault for giving Rashmica an example from a BE system. I'll fix up the example before I commit it. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
