1 files changed, 86 insertions, 0 deletions

diff --git a/kernel/gcov/gcc_base.c b/kernel/gcov/gcc_base.c
new file mode 100644
index 000000000000..3cf736b9f880
--- /dev/null
+++ b/kernel/gcov/gcc_base.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include "gcov.h"
+
+/*
+ * __gcov_init is called by gcc-generated constructor code for each object
+ * file compiled with -fprofile-arcs.
+ */
+void __gcov_init(struct gcov_info *info)
+{
+        static unsigned int gcov_version;
+
+        mutex_lock(&gcov_lock);
+        if (gcov_version == 0) {
+                gcov_version = gcov_info_version(info);
+                /*
+                 * Printing gcc's version magic may prove useful for debugging
+                 * incompatibility reports.
+                 */
+                pr_info("version magic: 0x%x\n", gcov_version);
+        }
+        /*
+         * Add new profiling data structure to list and inform event
+         * listener.
+         */
+        gcov_info_link(info);
+        if (gcov_events_enabled)
+                gcov_event(GCOV_ADD, info);
+        mutex_unlock(&gcov_lock);
+}
+EXPORT_SYMBOL(__gcov_init);
+
+/*
+ * These functions may be referenced by gcc-generated profiling code but serve
+ * no function for kernel profiling.
+ */
+void __gcov_flush(void)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_flush);
+
+void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_add);
+
+void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_single);
+
+void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_delta);
+
+void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_ior);
+
+void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_time_profile);
+
+void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_icall_topn);
+
+void __gcov_exit(void)
+{
+        /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_exit);