From 9bd9c03e9216324dd9dfcda9145702c561b4abb8 Mon Sep 17 00:00:00 2001
From: jb <jb@FreeBSD.org>
Date: Sun, 18 Nov 2007 00:23:31 +0000
Subject: Add a function to list symbols in a file and their values at the same
 time rather than having to list the symbols and then go back and look each
 one up by name.

---
 sys/kern/kern_linker.c | 10 ++++++++++
 sys/kern/linker_if.m   | 11 +++++++++++
 sys/sys/linker.h       |  8 ++++++++
 3 files changed, 29 insertions(+)

diff --git a/sys/kern/kern_linker.c b/sys/kern/kern_linker.c
index e6080aa..321436d 100644
--- a/sys/kern/kern_linker.c
+++ b/sys/kern/kern_linker.c
@@ -690,6 +690,16 @@ linker_file_lookup_set(linker_file_t file, const char *name,
 	return (error);
 }
 
+/*
+ * List all functions in a file.
+ */
+int
+linker_file_function_listall(linker_file_t lf,
+    int (*callback_func)(linker_file_t, linker_symval_t *, void *), void *arg)
+{
+	return (LINKER_EACH_FUNCTION_NAMEVAL(lf, callback_func, arg));
+}
+
 caddr_t
 linker_file_lookup_symbol(linker_file_t file, const char *name, int deps)
 {
diff --git a/sys/kern/linker_if.m b/sys/kern/linker_if.m
index 84d56d2..1530da2 100644
--- a/sys/kern/linker_if.m
+++ b/sys/kern/linker_if.m
@@ -64,6 +64,17 @@ METHOD int each_function_name {
 };
 
 #
+# Call the callback with each specified function and it's value
+# defined in the file.
+# Stop and return the error if the callback returns an error.
+#
+METHOD int each_function_nameval {
+	linker_file_t	file;
+	linker_function_nameval_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.
diff --git a/sys/sys/linker.h b/sys/sys/linker.h
index 83774e6..f9ce2a4 100644
--- a/sys/sys/linker.h
+++ b/sys/sys/linker.h
@@ -59,6 +59,8 @@ typedef struct linker_symval {
     size_t		size;
 } linker_symval_t;
 
+typedef int (*linker_function_nameval_callback_t)(linker_file_t, linker_symval_t *, void *);
+
 struct common_symbol {
     STAILQ_ENTRY(common_symbol) link;
     char*		name;
@@ -154,6 +156,12 @@ int linker_file_lookup_set(linker_file_t _file, const char *_name,
 			   void *_start, void *_stop, int *_count);
 
 /*
+ * List all functions in a file.
+ */
+int linker_file_function_listall(linker_file_t, int (*)(linker_file_t,
+    linker_symval_t *, void *), void *);
+
+/*
  * Functions soley for use by the linker class handlers.
  */
 int linker_add_class(linker_class_t _cls);
-- 
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