Verify modules on build-time rather than failing in runtime.

include/grub/module_verifier.h

@@ -0,0 +1,19 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <grub/types.h>
+
+#define GRUB_MODULE_VERIFY_SUPPORTS_REL 1
+#define GRUB_MODULE_VERIFY_SUPPORTS_RELA 2
+
+struct grub_module_verifier_arch {
+  const char *name;
+  int voidp_sizeof;
+  int bigendian;
+  int machine;
+  int flags;
+  const int *supported_relocations;
+};
+
+void grub_module_verify64(void *module_img, size_t module_size, const struct grub_module_verifier_arch *arch);
+void grub_module_verify32(void *module_img, size_t module_size, const struct grub_module_verifier_arch *arch);