diff -u -r gc6.5/alloc.c gc6.5-risa/alloc.c
--- gc6.5/alloc.c	2005-05-21 03:12:59.000000000 +0900
+++ gc6.5-risa/alloc.c	2005-07-11 17:57:51.000000000 +0900
@@ -110,6 +110,7 @@
 GC_bool GC_dont_expand = 0;
 
 word GC_free_space_divisor = 3;
+word GC_free_space_numerator = 1;
 
 extern GC_bool GC_collection_in_progress();
 		/* Collection is in progress, or was abandoned.	*/
@@ -174,9 +175,9 @@
 				   /* use a bit more of large empty heap */
 			       + total_root_size);
     if (TRUE_INCREMENTAL) {
-        return scan_size / (2 * GC_free_space_divisor);
+        return scan_size * GC_free_space_numerator / (2 * GC_free_space_divisor);
     } else {
-        return scan_size / GC_free_space_divisor;
+        return scan_size * GC_free_space_numerator / GC_free_space_divisor;
     }
 }
 
@@ -492,6 +493,7 @@
 #   if defined(REGISTER_LIBRARIES_EARLY)
         GC_cond_register_dynamic_libraries();
 #   endif
+	GC_timerstart();
     STOP_WORLD();
     IF_THREADS(GC_world_stopped = TRUE);
 #   ifdef CONDPRINT
@@ -526,6 +528,7 @@
 		    GC_deficit = i; /* Give the mutator a chance. */
                     IF_THREADS(GC_world_stopped = FALSE);
 	            START_WORLD();
+				GC_timerstop();
 	            return(FALSE);
 	    }
 	    if (GC_mark_some((ptr_t)(&dummy))) break;
@@ -560,6 +563,7 @@
     
     IF_THREADS(GC_world_stopped = FALSE);
     START_WORLD();
+	GC_timerstop();
 #   ifdef PRINTTIMES
 	GET_TIME(current_time);
 	GC_printf1("World-stopped marking took %lu msecs\n",
@@ -640,6 +644,7 @@
 	GET_TIME(start_time);
 	finalize_time = start_time;
 #   endif
+	GC_timerstart();
 
 #   ifdef GATHERSTATS
         GC_mem_found = 0;
@@ -757,6 +762,7 @@
 	           MS_TIME_DIFF(finalize_time,start_time),
 	           MS_TIME_DIFF(done_time,finalize_time));
 #   endif
+	GC_timerstop();
 }
 
 /* Externally callable routine to invoke full, stop-world collection */
@@ -971,6 +977,9 @@
         if (GC_collect_at_heapsize < GC_heapsize /* wrapped */)
 	  GC_collect_at_heapsize = (word)(-1);
 #     endif
+#if defined(VISUAL_LIB)
+    SendHeapSize();
+#endif
     return(TRUE);
 }
 
@@ -1067,6 +1076,22 @@
     
     if (sz == 0) return(0);
 
+#if defined(VISUAL)
+    {
+#include <signal.h>
+        extern int recv_intr;
+        if ( recv_intr ) {
+            if ( recv_intr == 1 ) {
+                recv_intr = 0;
+                int_handler();
+            } else {
+                recv_intr = 0;
+                ox_usr1_handler(0);
+            }
+        }
+    }
+#endif
+
     while (*flh == 0) {
       ENTER_GC();
       /* Do our share of marking work */
diff -u -r gc6.5/configure gc6.5-risa/configure
--- gc6.5/configure	2005-05-17 08:28:32.000000000 +0900
+++ gc6.5-risa/configure	2005-07-11 17:59:33.000000000 +0900
@@ -9531,7 +9531,7 @@
 _ACEOF
 
 cat >>confdefs.h <<\_ACEOF
-#define NO_SIGNALS 1
+##define NO_SIGNALS 1
 _ACEOF
 
 cat >>confdefs.h <<\_ACEOF
diff -u -r gc6.5/include/private/gcconfig.h gc6.5-risa/include/private/gcconfig.h
--- gc6.5/include/private/gcconfig.h	2005-05-21 05:48:29.000000000 +0900
+++ gc6.5-risa/include/private/gcconfig.h	2005-07-11 18:18:53.000000000 +0900
@@ -60,6 +60,13 @@
 # endif
 
 /* Determine the machine type: */
+/* T.Saito */
+# if defined(FREEBSD) && defined(__amd64__)
+#    define X86_64
+#    define mach_type_known
+# endif
+
+/* Determine the machine type: */
 # if defined(__arm__) || defined(__thumb__)
 #    define ARM32
 #    if !defined(LINUX) && !defined(NETBSD)
@@ -1936,6 +1943,28 @@
 	extern char etext[];
 #	define SEARCH_FOR_DATA_START
 #   endif
+#   ifdef FREEBSD /* T.Saito */
+#       define OS_TYPE "FREEBSD"
+#       ifndef GC_FREEBSD_THREADS
+#           define MPROTECT_VDB
+#       endif
+#       define SIG_SUSPEND SIGUSR1
+#       define SIG_THR_RESTART SIGUSR2
+#       define FREEBSD_STACKBOTTOM
+#       ifdef __ELF__
+#           define DYNAMIC_LOADING
+#       endif
+	extern int _etext[];
+        extern char etext[];
+	extern char edata[];
+	extern char end[];
+        extern char * GC_FreeBSDGetDataStart();
+#	define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
+#	define NEED_FIND_LIMIT
+#	define DATAEND (GC_find_limit (DATASTART, TRUE))
+#	define DATASTART2 ((ptr_t)(&edata))
+#	define DATAEND2 ((ptr_t)(&end))
+#   endif /* end T.Saito */
 # endif
 
 #if defined(LINUX) && defined(USE_MMAP)
diff -u -r gc6.5/reclaim.c gc6.5-risa/reclaim.c
--- gc6.5/reclaim.c	2004-11-23 02:58:18.000000000 +0900
+++ gc6.5-risa/reclaim.c	2005-07-11 18:01:16.000000000 +0900
@@ -1030,7 +1030,8 @@
 	
 	GET_TIME(start_time);
 #   endif
-    
+    GC_timerstart();
+
     for (kind = 0; kind < GC_n_kinds; kind++) {
     	ok = &(GC_obj_kinds[kind]);
     	rlp = ok -> ok_reclaim_list;
@@ -1052,6 +1053,7 @@
             }
         }
     }
+    GC_timerstop();
 #   ifdef PRINTTIMES
 	GET_TIME(done_time);
 	GC_printf1("Disposing of reclaim lists took %lu msecs\n",