X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fblackfin%2Fkernel%2Fsignal.c;h=dbc3bbf846be2f4cf7197644fa287c5e9f8ed070;hb=5b56eec77498f15317f3ff5ac9101372f400c859;hp=d1fa24401dc6995d92410efb3948989049682e52;hpb=ce1d5b23a8d1e19866ab82bdec0dc41fde5273d8;p=linux-2.6-omap-h63xx.git

diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index d1fa24401dc..dbc3bbf846b 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -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;
@@ -212,7 +215,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
 
 	/* Set up registers for signal handler */
 	wrusp((unsigned long)frame);
-	if (get_personality & FDPIC_FUNCPTRS) {
+	if (current->personality & FDPIC_FUNCPTRS) {
 		struct fdpic_func_descriptor __user *funcptr =
 			(struct fdpic_func_descriptor *) ka->sa.sa_handler;
 		__get_user(regs->pc, &funcptr->text);
@@ -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: