diff --git a/include/ChangeLog b/include/ChangeLog
index 8a3fbb131..ee71d3e43 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,9 @@
+2007-01-29  Simon Baldwin <simonb@google.com>
+
+	* demangle.h: New cplus_demangle_print_callback,
+	cplus_demangle_v3_callback, and java_demangle_v3_callback function
+	prototypes, and demangle_callbackref type definition.
+
 2007-01-16  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/3831
diff --git a/include/demangle.h b/include/demangle.h
index af2946727..360538cf3 100644
--- a/include/demangle.h
+++ b/include/demangle.h
@@ -1,6 +1,6 @@
 /* Defs for interface to demanglers.
    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002,
-   2003, 2004 Free Software Foundation, Inc.
+   2003, 2004, 2005, 2007 Free Software Foundation, Inc.
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -131,13 +131,25 @@ cplus_demangle_set_style (enum demangling_styles style);
 extern enum demangling_styles 
 cplus_demangle_name_to_style (const char *name);
 
-/* V3 ABI demangling entry points, defined in cp-demangle.c.  */
-extern char*
-cplus_demangle_v3 (const char* mangled, int options);
+/* Callback typedef for allocation-less demangler interfaces. */
+typedef void (*demangle_callbackref) (const char *, size_t, void *);
+
+/* V3 ABI demangling entry points, defined in cp-demangle.c.  Callback
+   variants return non-zero on success, zero on error.  char* variants
+   return a string allocated by malloc on success, NULL on error.  */
+extern int
+cplus_demangle_v3_callback (const char *mangled, int options,
+                            demangle_callbackref callback, void *opaque);
 
 extern char*
-java_demangle_v3 (const char* mangled);
+cplus_demangle_v3 (const char *mangled, int options);
 
+extern int
+java_demangle_v3_callback (const char *mangled,
+                           demangle_callbackref callback, void *opaque);
+
+extern char*
+java_demangle_v3 (const char *mangled);
 
 enum gnu_v3_ctor_kinds {
   gnu_v3_complete_object_ctor = 1,
@@ -529,6 +541,25 @@ cplus_demangle_print (int options,
                       int estimated_length,
                       size_t *p_allocated_size);
 
+/* This function takes a struct demangle_component tree and passes back
+   a demangled string in one or more calls to a callback function.
+   The first argument is DMGL_* options.  The second is the tree to
+   demangle.  The third is a pointer to a callback function; on each call
+   this receives an element of the demangled string, its length, and an
+   opaque value.  The fourth is the opaque value passed to the callback.
+   The callback is called once or more to return the full demangled
+   string.  The demangled element string is always nul-terminated, though
+   its length is also provided for convenience.  In contrast to
+   cplus_demangle_print(), this function does not allocate heap memory
+   to grow output strings (except perhaps where alloca() is implemented
+   by malloc()), and so is normally safe for use where the heap has been
+   corrupted.  On success, this function returns 1; on failure, 0.  */
+
+extern int
+cplus_demangle_print_callback (int options,
+                               const struct demangle_component *tree,
+                               demangle_callbackref callback, void *opaque);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */