Index: oprofile/libpp/profile.cpp
===================================================================
--- oprofile.orig/libpp/profile.cpp	2005-05-02 16:07:03.000000000 +0100
+++ oprofile/libpp/profile.cpp	2005-06-13 14:28:22.000000000 +0100
@@ -127,6 +127,11 @@
 	// if the image contains no symbol the vma range is [0 - filesize]
 	// in this case we can't substract start_offset else we will underflow
 	// and the iterator range will be empty.
+	
+	if (start < start_offset)
+		return make_pair(const_iterator(ordered_samples.end(), 0), 
+			const_iterator(ordered_samples.end(), 0));
+	
 	if (start)
 		start -= start_offset;
 
Index: oprofile/libpp/callgraph_container.cpp
===================================================================
--- oprofile.orig/libpp/callgraph_container.cpp	2005-05-02 16:07:02.000000000 +0100
+++ oprofile/libpp/callgraph_container.cpp	2005-06-13 14:27:57.000000000 +0100
@@ -139,21 +139,24 @@
 		unsigned long end;
 		b.get_symbol_range(i, start, end);
 
-		profile_t::iterator_pair p_it = profile.samples_range(
-			caller_to_key(start - boffset),
-			caller_to_key(end - boffset));
-
-		// Our odb_key_t contain (from_eip << 32 | to_eip), the range
-		// of key we selected above contain one caller but different
-		// callee and due to the ordering callee offsets are not
-		// consecutive so we must sort them first.
-
-		samples.clear();
-
-		for (; p_it.first != p_it.second; ++p_it.first) {
-			samples.push_back(make_pair(p_it.first.vma(),
-				p_it.first.count()));
-		}
+		if (start > boffset) {
+			profile_t::iterator_pair p_it = profile.samples_range(
+				caller_to_key(start - boffset),
+				caller_to_key(end - boffset));
+
+			// Our odb_key_t contain (from_eip << 32 | to_eip), the range
+			// of key we selected above contain one caller but different
+			// callee and due to the ordering callee offsets are not
+			// consecutive so we must sort them first.
+
+			samples.clear();
+
+			for (; p_it.first != p_it.second; ++p_it.first) {
+				samples.push_back(make_pair(p_it.first.vma(),
+					p_it.first.count()));
+			}
+		} else
+			samples.clear();
 
 		sort(samples.begin(), samples.end(), compare_by_callee_vma);