1 files changed, 32 insertions, 3 deletions

diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 1c80e4fc40ce..d8d3bb396cd6 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -44,7 +44,6 @@
 
 asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall);
 
-
 asmlinkage long
 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
 		struct pt_regs *regs)
@@ -176,6 +175,11 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	struct rt_sigframe __user *frame;
 	int err = 0;
 	int signal;
+	unsigned long address = 0;
+#ifdef CONFIG_MMU
+	pmd_t *pmdp;
+	pte_t *ptep;
+#endif
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
 
@@ -216,8 +220,29 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	 Negative 8 offset because return is rtsd r15, 8 */
 	regs->r15 = ((unsigned long)frame->tramp)-8;
 
-	__invalidate_cache_sigtramp((unsigned long)frame->tramp);
-
+	address = ((unsigned long)frame->tramp);
+#ifdef CONFIG_MMU
+	pmdp = pmd_offset(pud_offset(
+			pgd_offset(current->mm, address),
+					address), address);
+
+	preempt_disable();
+	ptep = pte_offset_map(pmdp, address);
+	if (pte_present(*ptep)) {
+		address = (unsigned long) page_address(pte_page(*ptep));
+		/* MS: I need add offset in page */
+		address += ((unsigned long)frame->tramp) & ~PAGE_MASK;
+		/* MS address is virtual */
+		address = virt_to_phys(address);
+		invalidate_icache_range(address, address + 8);
+		flush_dcache_range(address, address + 8);
+	}
+	pte_unmap(ptep);
+	preempt_enable();
+#else
+	flush_icache_range(address, address + 8);
+	flush_dcache_range(address, address + 8);
+#endif
 	if (err)
 		goto give_sigsegv;
 
@@ -233,6 +258,10 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	set_fs(USER_DS);
 
+	/* the tracer may want to single-step inside the handler */
+	if (test_thread_flag(TIF_SINGLESTEP))
+		ptrace_notify(SIGTRAP);
+
 #ifdef DEBUG_SIG
 	printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
 		current->comm, current->pid, frame, regs->pc);