On Fri, 17 Oct 2008, Benjamin Herrenschmidt wrote: > 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.
Yeah, I know. I was going to pick and choose which files in there should be converted, but then I saw that they were mostly asm, and it seemed to be better safe than sorry. Sure, we could probably bring it down a bit. But I'm a bit paranoid it may cause someone else not to boot because of something else being called at early boot up. But don't worry. When we get MCOUNT_RECORD ported to PPC this no longer becomes an issue, and we can simply do a "ifndef CONFIG_FTRACE_MCOUNT_RECORD" around the -pg removal in the Makefile. (or what ever the Makefile syntax is for config options) -- Steve _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
