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

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

diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c
new file mode 100644 (file)
index 0000000..0d5268a
--- /dev/null
+++ b/arch/sh/kernel/stacktrace.c
@@ -0,0 +1,43 @@
+/*
+ * arch/sh/kernel/stacktrace.c
+ *
+ * Stack trace management functions
+ *
+ *  Copyright (C) 2006  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <linux/thread_info.h>
+#include <asm/ptrace.h>
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+{
+       unsigned long *sp;
+
+       if (!task)
+               task = current;
+       if (task == current)
+               sp = (unsigned long *)current_stack_pointer;
+       else
+               sp = (unsigned long *)task->thread.sp;
+
+       while (!kstack_end(sp)) {
+               unsigned long addr = *sp++;
+
+               if (__kernel_text_address(addr)) {
+                       if (trace->skip > 0)
+                               trace->skip--;
+                       else
+                               trace->entries[trace->nr_entries++] = addr;
+                       if (trace->nr_entries >= trace->max_entries)
+                               break;
+               }
+       }
+}