1 files changed, 67 insertions, 0 deletions
diff --git a/lib/entry.c b/lib/entry.c
new file mode 100644
index 0000000..d852608
--- /dev/null
+++ b/lib/entry.c
@@ -0,0 +1,67 @@
+/*
+ * ctors.c
+ * Copyright 2019 Peter Jones <pjones@redhat.com>
+ *
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+/*
+ * 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 UINTN _init_array, _init_array_end;
+extern UINTN __CTOR_LIST__, __CTOR_END__;
+extern UINTN _fini_array, _fini_array_end;
+extern UINTN __DTOR_LIST__, __DTOR_END__;
+
+typedef void (*funcp)(void);
+
+static void ctors(void)
+{
+	for (funcp *location = (void *)&_init_array; location < (funcp *)&_init_array_end; location++) {
+		funcp func = *location;
+		if (location != NULL)
+			func();
+	}
+
+	for (funcp *location = (void *)&__CTOR_LIST__; location < (funcp *)&__CTOR_END__; location++) {
+		funcp func = *location;
+		if (location != NULL)
+			func();
+	}
+}
+
+static void dtors(void)
+{
+	for (funcp *location = (void *)&__DTOR_LIST__; location < (funcp *)&__DTOR_END__; location++) {
+		funcp func = *location;
+		if (location != NULL)
+			func();
+	}
+
+	for (funcp *location = (void *)&_fini_array; location < (funcp *)&_fini_array_end; location++) {
+		funcp func = *location;
+		if (location != 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