Uwe Kleine-König wrote: > Hello, > > currently[1] __builtin_return_address for ARM only works with level == 0. > > For ftrace in the linux kernel it would be great to implement that for > level > 0 (provided that framepointers or unwind information are > available of course). On the linux-arm-kernel ML Mikael Pettersson[2] > said that "__builtin_return_address(N) where N>0 should never have been > introduced into gcc.". Is that the general view for > __builtin_return_address or would a patch be accepted?
My personal opinion is that Mikael Pettersson is right, but since the damage is done why not extend it to more architectures. I am not an ARM maintainer though. Paolo
