KASAN option in the kernel

sys/arch/amd64/amd64/kasan.c

@@ -0,0 +1,56 @@
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD$");
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/cprng.h>
+#include <sys/kmem.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/filedesc.h>
+
+#define DEFINE_ASAN_LOAD_STORE(size)				\
+	void __asan_load##size(unsigned long);			\
+	void __asan_load##size(unsigned long addr)		\
+	{}							\
+	void __asan_load##size##_noabort(unsigned long);	\
+	void __asan_load##size##_noabort(unsigned long addr)	\
+	{}							\
+	void __asan_store##size(unsigned long);			\
+	void __asan_store##size(unsigned long addr)		\
+	{}							\
+	void __asan_store##size##_noabort(unsigned long);	\
+	void __asan_store##size##_noabort(unsigned long addr)	\
+	{}							\
+
+
+DEFINE_ASAN_LOAD_STORE(1);
+DEFINE_ASAN_LOAD_STORE(2);
+DEFINE_ASAN_LOAD_STORE(4);
+DEFINE_ASAN_LOAD_STORE(8);
+DEFINE_ASAN_LOAD_STORE(16);
+
+void __asan_loadN(unsigned long, size_t);
+void __asan_loadN(unsigned long addr, size_t size)
+{}
+
+void __asan_loadN_noabort(unsigned long, size_t);
+void __asan_loadN_noabort(unsigned long addr, size_t size)
+{}
+
+void __asan_storeN(unsigned long, size_t);
+void __asan_storeN(unsigned long addr, size_t size)
+{}
+
+void __asan_storeN_noabort(unsigned long, size_t);
+void __asan_storeN_noabort(unsigned long addr, size_t size)
+{}
+
+/* to shut up compiler complaints */
+
+void __asan_handle_no_return(void);
+void __asan_handle_no_return(void) {}