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

efi/lib/ctors.S

@@ -0,0 +1,55 @@
+/*
+ * Try to define the minimal empty init/ctor/dtor/fini_arrays so building with
+ * older or out-of-tree linker scripts will still work.
+ */
+/*
+ * Note that these aren't 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.
+ */
+#if defined(__ELF__)
+	.section .init_array,"aw",%init_array
+#else
+	.section .init_array,"aw"
+#endif
+	.p2align 4, 0
+	.globl __init_array_start
+__init_array_start:
+	.globl __init_array_end
+__init_array_end:
+#if defined(__ELF__)
+	.section .ctors,"aw",%progbits
+#else
+	.section .ctors,"aw"
+#endif
+	.p2align 4, 0
+	.globl __CTOR_LIST__
+__CTOR_LIST__:
+	.globl __CTOR_END__
+__CTOR_END__:
+#if defined(__ELF__)
+	.section .dtors,"aw",%progbits
+#else
+	.section .dtors,"aw"
+#endif
+	.p2align 4, 0
+	.globl __DTOR_LIST__
+__DTOR_LIST__:
+	.globl __DTOR_END__
+__DTOR_END__:
+#if defined(__ELF__)
+	.section .fini_array,"aw",%fini_array
+#else
+	.section .fini_array,"aw"
+#endif
+	.p2align 4, 0
+	.globl __fini_array_start
+__fini_array_start:
+	.globl __fini_array_end
+__fini_array_end:
+
+#if defined(__ELF__) && defined(__linux__)
+	.section .note.GNU-stack,"",%progbits
+#endif
+