1 files changed, 45 insertions, 0 deletions
diff --git a/usr.sbin/kldxref/fileformat b/usr.sbin/kldxref/fileformat
new file mode 100644
index 0000000..81d115c
--- /dev/null
+++ b/usr.sbin/kldxref/fileformat
@@ -0,0 +1,45 @@
+$FreeBSD$
+
+linker.hints file consists from the one or more records,
+and is processed by sys/kern/kern_linker.c::linker_hints_lookup()
+
+First record of file is special and determines its version:
+
+int	version;
+
+    All subsequent records have following format:
+    
+struct record {
+	int	length;		/* length of following data */
+	char	data[length];
+};
+
+    Each record is aligned on sizeof(int) boundary. First integer of the field
+'data' determines its type:
+
+struct data {
+	int	type;		/* type of data. currently MDT_* values */
+};
+
+    The rest of record depends on the type.
+
+struct string {
+	uint8_t	length;		/* length of string */
+	char	val[];		/* string itself (no terminating zero) */
+};
+
+struct data_mdt_version {
+	int	type = MDT_VERSION;
+	struct string	modname;
+	/* padding */
+	int	version;
+	struct string	kldname;
+	/* padding */
+};
+
+struct data_mdt_module {
+	int	type = MDT_MODULE;
+	struct string	modname;
+	struct string	kldname;
+	/* padding */
+};