ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/sh/kernel/stacktrace.c b/marvell/linux/arch/sh/kernel/stacktrace.c
new file mode 100644
index 0000000..2950b19
--- /dev/null
+++ b/marvell/linux/arch/sh/kernel/stacktrace.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/stacktrace.c
+ *
+ * Stack trace management functions
+ *
+ * Copyright (C) 2006 - 2008 Paul Mundt
+ */
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/stacktrace.h>
+#include <linux/thread_info.h>
+#include <linux/module.h>
+#include <asm/unwinder.h>
+#include <asm/ptrace.h>
+#include <asm/stacktrace.h>
+
+static int save_stack_stack(void *data, char *name)
+{
+ return 0;
+}
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+static void save_stack_address(void *data, unsigned long addr, int reliable)
+{
+ struct stack_trace *trace = data;
+
+ if (!reliable)
+ return;
+
+ if (trace->skip > 0) {
+ trace->skip--;
+ return;
+ }
+
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = addr;
+}
+
+static const struct stacktrace_ops save_stack_ops = {
+ .stack = save_stack_stack,
+ .address = save_stack_address,
+};
+
+void save_stack_trace(struct stack_trace *trace)
+{
+ unsigned long *sp = (unsigned long *)current_stack_pointer;
+
+ unwind_stack(current, NULL, sp, &save_stack_ops, trace);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+static void
+save_stack_address_nosched(void *data, unsigned long addr, int reliable)
+{
+ struct stack_trace *trace = (struct stack_trace *)data;
+
+ if (!reliable)
+ return;
+
+ if (in_sched_functions(addr))
+ return;
+
+ if (trace->skip > 0) {
+ trace->skip--;
+ return;
+ }
+
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = addr;
+}
+
+static const struct stacktrace_ops save_stack_ops_nosched = {
+ .stack = save_stack_stack,
+ .address = save_stack_address_nosched,
+};
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+ unsigned long *sp = (unsigned long *)tsk->thread.sp;
+
+ unwind_stack(current, NULL, sp, &save_stack_ops_nosched, trace);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);