On Thu, Apr 18, 2013 at 08:44:19PM +0200, Oleg Nesterov wrote: > 24f1e32c "hw-breakpoints: Rewrite the hw-breakpoints layer on top > of perf events" introduced the minor regression. Before this commit > > PTRACE_POKEUSER DR7, enableDR0 > PTRACE_POKEUSER DR0, address > > was perfectly valid, now PTRACE_POKEUSER(DR7) fails if DR0 was not > previously initialized by PTRACE_POKEUSER(DR0). > > Change ptrace_write_dr7() to do ptrace_register_breakpoint(addr => 0) > if !bp && !disabled. This fixes watchpoint-zeroaddr from ptrace-tests, > see https://bugzilla.redhat.com/show_bug.cgi?id=660204. > > Reported-by: Jan Kratochvil <jan.kratoch...@redhat.com> > Signed-off-by: Oleg Nesterov <o...@redhat.com>
Acked-by: Frederic Weisbecker <fweis...@gmail.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
