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Commit 8513c42e authored by Bernd Schmidt's avatar Bernd Schmidt Committed by Bryan Wu
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[Blackfin] arch: disable single stepping when delivering a signal 



When delivering a signal, disable single stepping but call
ptrace_notify if it was enabled before. The idea was taken
from the x86 port.

Signed-off-by: default avatarBernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 7d39270d

arch/blackfin/kernel/signal.c

+13 −0
Original line number Diff line number Diff line
@@ -42,6 +42,9 @@ 


#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))



/* Location of the trace bit in SYSCFG. */

#define TRACE_BITS 0x0001



struct fdpic_func_descriptor {

	unsigned long	text;

	unsigned long	GOT;
@@ -225,6 +228,16 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info, 
	regs->r1 = (unsigned long)(&frame->info);

	regs->r2 = (unsigned long)(&frame->uc);



	/*

	 * Clear the trace flag when entering the signal handler, but

	 * notify any tracer that was single-stepping it. The tracer

	 * may want to single-step inside the handler too.

	 */

	if (regs->syscfg & TRACE_BITS) {

		regs->syscfg &= ~TRACE_BITS;

		ptrace_notify(SIGTRAP);

	}



	return 0;



 give_sigsegv: