1 files changed, 78 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
new file mode 100644
index 000000000..45bbba9d9
--- /dev/null
+++ b/arch/microblaze/kernel/traps.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/debug_locks.h>
+
+#include <asm/exceptions.h>
+#include <asm/unwind.h>
+
+void trap_init(void)
+{
+	__enable_hw_exceptions();
+}
+
+static unsigned long kstack_depth_to_print;	/* 0 == entire stack */
+
+static int __init kstack_setup(char *s)
+{
+	return !kstrtoul(s, 0, &kstack_depth_to_print);
+}
+__setup("kstack=", kstack_setup);
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	unsigned long words_to_show;
+	u32 fp = (u32) sp;
+
+	if (fp == 0) {
+		if (task) {
+			fp = ((struct thread_info *)
+				(task->stack))->cpu_context.r1;
+		} else {
+			/* Pick up caller of dump_stack() */
+			fp = (u32)&sp - 8;
+		}
+	}
+
+	words_to_show = (THREAD_SIZE - (fp & (THREAD_SIZE - 1))) >> 2;
+	if (kstack_depth_to_print && (words_to_show > kstack_depth_to_print))
+		words_to_show = kstack_depth_to_print;
+
+	pr_info("Kernel Stack:\n");
+
+	/*
+	 * Make the first line an 'odd' size if necessary to get
+	 * remaining lines to start at an address multiple of 0x10
+	 */
+	if (fp & 0xF) {
+		unsigned long line1_words = (0x10 - (fp & 0xF)) >> 2;
+		if (line1_words < words_to_show) {
+			print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32,
+				       4, (void *)fp, line1_words << 2, 0);
+			fp += line1_words << 2;
+			words_to_show -= line1_words;
+		}
+	}
+	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32, 4, (void *)fp,
+		       words_to_show << 2, 0);
+	pr_info("\n\nCall Trace:\n");
+	microblaze_unwind(task, NULL);
+	pr_info("\n");
+
+	if (!task)
+		task = current;
+
+	debug_show_held_locks(task);
+}