1 files changed, 72 insertions, 0 deletions
diff --git a/xen/common/gcov/gcov.c b/xen/common/gcov/gcov.c
new file mode 100644
index 0000000000..4de4b58d3d
--- /dev/null
+++ b/xen/common/gcov/gcov.c
@@ -0,0 +1,72 @@
+/*
+ *  This code maintains a list of active profiling data structures.
+ *
+ *    Copyright IBM Corp. 2009
+ *    Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
+ *
+ *    Uses gcc-internal data definitions.
+ *    Based on the gcov-kernel patch by:
+ *       Hubertus Franke <frankeh@us.ibm.com>
+ *       Nigel Hinds <nhinds@us.ibm.com>
+ *       Rajan Ravindran <rajancr@us.ibm.com>
+ *       Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
+ *       Paul Larson
+ */
+
+#include <xen/config.h>
+#include <xen/init.h>
+#include <xen/lib.h>
+#include <xen/hypercall.h>
+#include <xen/gcov.h>
+#include <xen/errno.h>
+
+static struct gcov_info *info_list;
+
+/*
+ * __gcov_init is called by gcc-generated constructor code for each object
+ * file compiled with -fprofile-arcs.
+ *
+ * Although this function is called only during initialization is called from
+ * a .text section which is still present after initialization so not declare
+ * as __init.
+ */
+void __gcov_init(struct gcov_info *info)
+{
+    /* add new profiling data structure to list */
+    info->next = info_list;
+    info_list = info;
+}
+
+/*
+ * These functions may be referenced by gcc-generated profiling code but serve
+ * no function for Xen.
+ */
+void __gcov_flush(void)
+{
+    /* Unused. */
+}
+
+void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
+{
+    /* Unused. */
+}
+
+void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
+{
+    /* Unused. */
+}
+
+void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
+{
+    /* Unused. */
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */