Commit da0cdc14 authored Jun 01, 2009 by K.Prasad Committed by Frederic Weisbecker Jun 02, 2009

hw-breakpoints: modify signal handling code to refrain from re-enabling HW Breakpoints



This patch disables re-enabling of Hardware Breakpoint registers through
the signal handling code. This is now done during from hw_breakpoint_handler().

Original-patch-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

parent 66cb5917

arch/x86/kernel/signal.c

+0 −9

Original line number	Diff line number	Diff line
		@@ -800,15 +800,6 @@ static void do_signal(struct pt_regs *regs)

		signr = get_signal_to_deliver(&info, &ka, regs, NULL);
		if (signr > 0) {
		/*
		* Re-enable any watchpoints before delivering the
		* signal to user space. The processor register will
		* have been cleared if the watchpoint triggered
		* inside the kernel.
		*/
		if (current->thread.debugreg7)
		set_debugreg(current->thread.debugreg7, 7);

		/* Whee! Actually deliver the signal. */
		if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
		/*