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powerpc: Extended ptrace interface From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Based on patches originally written by Torez Smith. Add a new extended ptrace interface so that user-space has a single interface for powerpc, without having to know the specific layout of the debug registers. Implement: PPC_PTRACE_GETHWDEBUGINFO PPC_PTRACE_SETHWDEBUG PPC_PTRACE_DELHWDEBUG Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: David Gibson <dwg@au1.ibm.com> Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Sergio Durigan Junior <sergiodj@br.ibm.com> Cc: Thiago Jung Bauermann <bauerman@br.ibm.com> Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>