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-rw-r--r--arch/ia64/kernel/stacktrace.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/ia64/kernel/stacktrace.c b/arch/ia64/kernel/stacktrace.c
new file mode 100644
index 0000000000..6e583a6bd2
--- /dev/null
+++ b/arch/ia64/kernel/stacktrace.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/ia64/kernel/stacktrace.c
+ *
+ * Stack trace management functions
+ *
+ */
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <linux/module.h>
+
+static void
+ia64_do_save_stack(struct unw_frame_info *info, void *arg)
+{
+ struct stack_trace *trace = arg;
+ unsigned long ip;
+ int skip = trace->skip;
+
+ trace->nr_entries = 0;
+ do {
+ unw_get_ip(info, &ip);
+ if (ip == 0)
+ break;
+ if (skip == 0) {
+ trace->entries[trace->nr_entries++] = ip;
+ if (trace->nr_entries == trace->max_entries)
+ break;
+ } else
+ skip--;
+ } while (unw_unwind(info) >= 0);
+}
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+ unw_init_running(ia64_do_save_stack, trace);
+}
+EXPORT_SYMBOL(save_stack_trace);