- Add a new linker_file_foreach() function that walks the list of linker

  file objects calling a user-specified predicate function on each object.
  The iteration terminates either when the entire list has been iterated
  over or the predicate function returns a non-zero value.
  linker_file_foreach() returns the value returned by the last invocation
  of the predicate function.  It also accepts a void * context pointer that
  is passed to the predicate function as well.  Using an iterator function
  avoids exposing linker internals to the rest of the kernel making locking
  simpler.
- Use linker_file_foreach() instead of walking the list of linker files
  manually to lookup ndis files in ndis(4).
- Use linker_file_foreach() to implement linker_hwpmc_list_objects().

1 files changed, 12 insertions, 0 deletions

diff --git a/sys/sys/linker.h b/sys/sys/linker.h
index bfd9804..bebe9c9 100644
--- a/sys/sys/linker.h
+++ b/sys/sys/linker.h
@@ -95,6 +95,11 @@ struct linker_class {
 };
 
 /*
+ * Function type used when iterating over the list of linker files.
+ */
+typedef int linker_predicate_t(linker_file_t, void *);
+
+/*
  * The "file" for the kernel.
  */
 extern linker_file_t	linker_kernel_file;
@@ -111,6 +116,13 @@ int linker_reference_module(const char* _modname, struct mod_depend *_verinfo,
 			    linker_file_t* _result);
 
 /*
+ * Iterate over all of the currently loaded linker files calling the
+ * predicate function while the function returns 0.  Returns the value
+ * returned by the last predicate function.
+ */
+int linker_file_foreach(linker_predicate_t *_predicate, void *_context);
+
+/*
  * Find a currently loaded file given its filename.
  */
 linker_file_t linker_find_file_by_name(const char* _filename);