[chore] Use gnu-efi as a part of project

efi/lib/entry.c

@@ -0,0 +1,73 @@
+/*
+ * ctors.c
+ * Copyright 2019 Peter Jones <pjones@redhat.com>
+ *
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+typedef void (*funcp)(void);
+
+/*
+ * Note that these aren't the using the GNU "CONSTRUCTOR" output section
+ * command, so they don't start with a size.  Because of p2align and the
+ * end/END definitions, and the fact that they're mergeable, they can also
+ * have NULLs which aren't guaranteed to be at the end.
+ */
+extern funcp __init_array_start[], __init_array_end[];
+extern funcp __CTOR_LIST__[], __CTOR_END__[];
+extern funcp __fini_array_start[], __fini_array_end[];
+extern funcp __DTOR_LIST__[], __DTOR_END__[];
+
+static void ctors(void)
+{
+	size_t __init_array_length = __init_array_end - __init_array_start;
+	for (size_t i = 0; i < __init_array_length; i++) {
+		funcp func = __init_array_start[i];
+		if (func != NULL)
+			func();
+	}
+
+	size_t __CTOR_length = __CTOR_END__ - __CTOR_LIST__;
+	for (size_t i = 0; i < __CTOR_length; i++) {
+		size_t current = __CTOR_length - i - 1;
+		funcp func = __CTOR_LIST__[current];
+		if (func != NULL)
+			func();
+	}
+}
+
+static void dtors(void)
+{
+	size_t __DTOR_length = __DTOR_END__ - __DTOR_LIST__;
+	for (size_t i = 0; i < __DTOR_length; i++) {
+		funcp func = __DTOR_LIST__[i];
+		if (func != NULL)
+			func();
+	}
+
+	size_t __fini_array_length = __fini_array_end - __fini_array_start;
+	for (size_t i = 0; i < __fini_array_length; i++) {
+		size_t current = __fini_array_length - i - 1;
+		funcp func = __fini_array_start[current];
+		if (func != NULL)
+			func();
+	}
+}
+
+extern EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *systab);
+
+EFI_STATUS _entry(EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
+{
+	EFI_STATUS status;
+	InitializeLib(image, systab);
+
+	ctors();
+	status = efi_main(image, systab);
+	dtors();
+
+	return status;
+}
+
+// vim:fenc=utf-8:tw=75:noet