1 files changed, 43 insertions, 0 deletions
diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c
new file mode 100644
index 0000000000..023834ef58
--- /dev/null
+++ b/arch/parisc/kernel/stacktrace.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Stack trace management functions
+ *
+ *  Copyright (C) 2009-2021 Helge Deller <deller@gmx.de>
+ *  based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@redhat.com>
+ *  and parisc unwind functions by Randolph Chung <tausq@debian.org>
+ *
+ *  TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
+ */
+#include <linux/kernel.h>
+#include <linux/stacktrace.h>
+
+#include <asm/unwind.h>
+
+static void notrace walk_stackframe(struct task_struct *task,
+	struct pt_regs *regs, bool (*fn)(void *, unsigned long), void *cookie)
+{
+	struct unwind_frame_info info;
+
+	unwind_frame_init_task(&info, task, NULL);
+	while (1) {
+		if (unwind_once(&info) < 0 || info.ip == 0)
+			break;
+
+		if (__kernel_text_address(info.ip))
+			if (!fn(cookie, info.ip))
+				break;
+	}
+}
+
+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
+		     struct task_struct *task, struct pt_regs *regs)
+{
+	walk_stackframe(task, regs, consume_entry, cookie);
+}
+
+int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie,
+			     struct task_struct *task)
+{
+	walk_stackframe(task, NULL, consume_entry, cookie);
+	return 1;
+}