This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sparc64 / kernel / stacktrace.c

diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
new file mode 100644 (file)
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);
+}