--- /dev/null
+// Licensed under BSD-MIT: See LICENSE.
+#ifndef CCAN_AUTODATA_H
+#define CCAN_AUTODATA_H
+#include "config.h"
+#include <ccan/compiler/compiler.h>
+#include <stdlib.h>
+
+#if HAVE_SECTION_START_STOP
+
+/**
+ * AUTODATA_TYPE - declare the type for a given autodata name.
+ * @name: the name for this set of autodata
+ * @type: the type this autodata points to
+ *
+ * This macro is usually placed in a header: it must preceed any
+ * autodata functions in the file.
+ *
+ * Example:
+ * // My set of char pointers.
+ * AUTODATA_TYPE(names, char);
+ */
+#define AUTODATA_TYPE(name, type) \
+ typedef type autodata_##name##_; \
+ extern type *__start_autodata_##name[], *__stop_autodata_##name[]
+
+/**
+ * AUTODATA - add a pointer to this autodata set
+ * @name: the name of the set of autodata
+ * @ptr: the compile-time-known pointer
+ *
+ * This embeds @ptr into the binary, with the tag corresponding to
+ * @name (which must look like a valid identifier, no punctuation!).
+ * The type of @ptr must match that given by AUTODATA_TYPE. It is
+ * usually a file-level declaration.
+ *
+ * Example:
+ * // Put two char pointers into the names AUTODATA set.
+ * AUTODATA(names, "Arabella");
+ * AUTODATA(names, "Alex");
+ */
+#define AUTODATA(name, ptr) \
+ static const autodata_##name##_ *NEEDED \
+ __attribute__((section("autodata_" #name))) \
+ AUTODATA_VAR_(name, __LINE__) = (ptr);
+
+/**
+ * autodata_get - get an autodata set
+ * @name: the name of the set of autodata
+ * @nump: the number of items in the set.
+ *
+ * This extract the embedded pointers matching @name. It may fail
+ * if malloc() fails, or if there is no AUTODATA at all.
+ *
+ * The return will be a pointer to an array of @type pointers (from
+ * AUTODATA_TYPE).
+ *
+ * Example:
+ * static void print_embedded_names(void)
+ * {
+ * unsigned int i, num;
+ * char **n = autodata_get(names, &num);
+ *
+ * for (i = 0; i < num; i++)
+ * printf("%s\n", n[i]);
+ * }
+ */
+#define autodata_get(name, nump) \
+ ((autodata_##name##_ **) \
+ autodata_get_section(__start_autodata_##name, \
+ __stop_autodata_##name, (nump)))
+#endif /* HAVE_SECTION_START_STOP */
+
+/**
+ * autodata_free - free the table returned by autodata_get()
+ * @p: the table.
+ */
+void autodata_free(void *p);
+
+/* Internal functions. */
+#define AUTODATA_VAR__(name, line) autodata_##name##_##line
+#define AUTODATA_VAR_(name, line) AUTODATA_VAR__(name, line)
+
+#if HAVE_SECTION_START_STOP
+void *autodata_get_section(void *start, void *stop, size_t *nump);
+#else
+#define AUTODATA_TYPE(name, type) \
+ typedef type autodata_##name##_; \
+ static const void *autodata_##name##_ex = &autodata_##name##_ex
+
+#define AUTODATA_MAGIC ((long)0xFEEDA10DA7AF00D5ULL)
+#define AUTODATA(name, ptr) \
+ static const autodata_##name##_ *NEEDED \
+ AUTODATA_VAR_(name, __LINE__)[4] = \
+ { (void *)AUTODATA_MAGIC, \
+ (void *)&AUTODATA_VAR_(name, __LINE__), \
+ (ptr), \
+ (void *)#name }
+
+#define autodata_get(name, nump) \
+ ((autodata_##name##_ **) \
+ autodata_make_table(&autodata_##name##_ex, #name, (nump)))
+
+void *autodata_make_table(const void *example, const char *name, size_t *nump);
+#endif
+
+#endif /* CCAN_AUTODATA_H */