Add the sysctl "kern.function_list", which currently exports all

function symbols in the kernel in a list of C strings, with an extra
nul-termination at the end.

This sysctl requires addition of a new linker operation.  Now,
linker_file_t's need to respond to "each_function_name" to export
their function symbols.

Note that the sysctl doesn't currently allow distinguishing multiple
symbols with the same name from different modules, but could quite
easily without a change to the linker operation.  This will be a nicety
to have when it can be used.

Obtained from:	NAI Labs CBOSS project
Funded by:	DARPA

1 files changed, 10 insertions, 0 deletions

diff --git a/sys/kern/linker_if.m b/sys/kern/linker_if.m
index be84b9e..9dafb57 100644
--- a/sys/kern/linker_if.m
+++ b/sys/kern/linker_if.m
@@ -54,6 +54,16 @@ METHOD int search_symbol {
 };
 
 #
+# Call the callback with each specified function defined in the file.
+# Stop and return the error if the callback returns an error.
+#
+METHOD int each_function_name {
+	linker_file_t	file;
+	linker_function_name_callback_t	callback;
+	void*		opaque;
+};
+
+#
 # Search for a linker set in a file.  Return a pointer to the first
 # entry (which is itself a pointer), and the number of entries.
 # "stop" points to the entry beyond the last valid entry.