--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/druntime/src/compiler/dmd/memory_osx.c	Tue Jun 02 17:43:06 2009 +0100
@@ -0,0 +1,75 @@
+/**
+ * This module provides OSX-specific support routines for memory.d.
+ *
+ * Copyright: Copyright Digital Mars 2008 - 2009.
+ * License:   <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
+ * Authors:   Walter Bright, Sean Kelly
+ *
+ *          Copyright Digital Mars 2008 - 2009.
+ * Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *          http://www.boost.org/LICENSE_1_0.txt)
+ */
+#ifdef __APPLE__
+
+
+#include <mach-o/dyld.h>
+#include <mach-o/getsect.h>
+
+void gc_addRange( void* p, size_t sz );
+void gc_removeRange( void* p );
+
+typedef struct
+{
+    const char* seg;
+    const char* sect;
+} seg_ref;
+
+const static seg_ref data_segs[] = {{SEG_DATA, SECT_DATA},
+                                    {SEG_DATA, SECT_BSS},
+                                    {SEG_DATA, SECT_COMMON}};
+const static int NUM_DATA_SEGS   = sizeof(data_segs) / sizeof(seg_ref);
+
+
+static void on_add_image( const struct mach_header* h, intptr_t slide )
+{
+    const struct section* sect;
+    int i;
+
+    for( i = 0; i < NUM_DATA_SEGS; ++i )
+    {
+        sect = getsectbynamefromheader( h,
+                                        data_segs[i].seg,
+                                        data_segs[i].sect );
+        if( sect == NULL || sect->size == 0 )
+            continue;
+        gc_addRange( (void*) sect->addr + slide, sect->size );
+    }
+}
+
+
+static void on_remove_image( const struct mach_header* h, intptr_t slide )
+{
+    const struct section* sect;
+    int i;
+
+    for( i = 0; i < NUM_DATA_SEGS; ++i )
+    {
+        sect = getsectbynamefromheader( h,
+                                        data_segs[i].seg,
+                                        data_segs[i].sect );
+        if( sect == NULL || sect->size == 0 )
+            continue;
+        gc_removeRange( (void*) sect->addr + slide );
+    }
+}
+
+
+void _d_osx_image_init()
+{
+    _dyld_register_func_for_add_image( &on_add_image );
+    _dyld_register_func_for_remove_image( &on_remove_image );
+}
+
+
+#endif