[SPARC64]: Add irqtrace/stacktrace/lockdep support.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
new file mode 100644
index 0000000..c4d15f2
--- /dev/null
+++ b/arch/sparc64/kernel/stacktrace.c
@@ -0,0 +1,41 @@
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <linux/thread_info.h>
+#include <asm/ptrace.h>
+
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+{
+ unsigned long ksp, fp, thread_base;
+ struct thread_info *tp;
+
+ if (!task)
+ task = current;
+ tp = task_thread_info(task);
+ if (task == current) {
+ flushw_all();
+ __asm__ __volatile__(
+ "mov %%fp, %0"
+ : "=r" (ksp)
+ );
+ } else
+ ksp = tp->ksp;
+
+ fp = ksp + STACK_BIAS;
+ thread_base = (unsigned long) tp;
+ do {
+ struct reg_window *rw;
+
+ /* Bogus frame pointer? */
+ if (fp < (thread_base + sizeof(struct thread_info)) ||
+ fp >= (thread_base + THREAD_SIZE))
+ break;
+
+ rw = (struct reg_window *) fp;
+ if (trace->skip > 0)
+ trace->skip--;
+ else
+ trace->entries[trace->nr_entries++] = rw->ins[7];
+
+ fp = rw->ins[6] + STACK_BIAS;
+ } while (trace->nr_entries < trace->max_entries);
+}
