Messages in this thread | | | Subject | Re: [PATCH] ftrace: powerpc: remove startup functions from tracing | From | Benjamin Herrenschmidt <> | Date | Fri, 17 Oct 2008 11:50:46 +1100 |
| |
On Thu, 2008-10-16 at 20:48 -0400, Steven Rostedt wrote: > > The early init code in PowerPC is not mapped to their final locations > and all jumps and memory references must be done with relative jumps > and accesses. > > The lib files in the powerpc directory are called in early boot, and > since mcount will perform direct access to memory, the lib files need > not be traced.
This is annoying though, because that means things like memcpy, copy_to_from_user etc... can't be traced. On the other hand a lot of that is asm and already doesn't call mcount.
Cheers, Ben.
| |