[project @ 2003-08-29 16:00:25 by simonmar]

[ghc-hetmet.git] / ghc / rts / MBlock.h

diff --git a/ghc/rts/MBlock.h b/ghc/rts/MBlock.h
index de5d0b4..f528354 100644 (file)
--- a/ghc/rts/MBlock.h
+++ b/ghc/rts/MBlock.h
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: MBlock.h,v 1.17 2003/07/30 10:38:42 simonmar Exp $
+ * $Id: MBlock.h,v 1.18 2003/08/29 16:00:29 simonmar Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -70,6 +70,17 @@ extern StgWord8 mblock_map[];
 # define MARK_HEAP_ALLOCED(p)  ((MBLOCK_MAP_ENTRY(p) < MBLOCK_MAP_SIZE) \
                                        && (mblock_map[MBLOCK_MAP_ENTRY(p)] = 1))
 
+#elif defined(x86_64_TARGET_ARCH)
+/* XXX: This is a HACK, and will not work in general!  We just use the
+ * lower 32 bits of the address, and do the same as for the 32-bit
+ * version.  As long as the OS gives us memory in a roughly linear
+ * fashion, it won't go wrong until we've allocated 4G.  */
+# define MBLOCK_MAP_SIZE       4096
+# define MBLOCK_MAP_ENTRY(p)   (((StgWord)(p) & 0xffffffff) >> MBLOCK_SHIFT)
+# define HEAP_ALLOCED(p)       (mblock_map[MBLOCK_MAP_ENTRY(p)])
+# define MARK_HEAP_ALLOCED(p)  (mblock_map[MBLOCK_MAP_ENTRY(p)] = 1)
+
+
 #else
 # error HEAP_ALLOCED not defined
 #endif