--- emacs-24.3.orig/src/alloc.c
+++ emacs-24.3/src/alloc.c
@@ -47,6 +47,13 @@
 
 #include <verify.h>
 
+static void *initial_brk;
+__attribute__((__constructor__))
+static void init()
+{
+	initial_brk = sbrk(0);
+}
+
 /* GC_CHECK_MARKED_OBJECTS means do sanity checks on allocated objects.
    Doable only if GC_MARK_STACK.  */
 #if ! GC_MARK_STACK
@@ -699,6 +706,14 @@
 {
   void *val;
 
+  if (block && block < initial_brk) {
+    size_t len = (char *)initial_brk - (char *)block;
+    if (len > size) len = size;
+    void *p = xmalloc(size);
+    memcpy(p, block, len);
+    return p;
+  }
+
   MALLOC_BLOCK_INPUT;
   /* We must call malloc explicitly when BLOCK is 0, since some
      reallocs don't do this.  */
@@ -720,6 +735,7 @@
 void
 xfree (void *block)
 {
+  if (block < initial_brk) return;
   if (!block)
     return;
   MALLOC_BLOCK_INPUT;
@@ -910,6 +926,7 @@
 static void
 lisp_free (void *block)
 {
+  if (block < initial_brk) return;
   MALLOC_BLOCK_INPUT;
   free (block);
 #if GC_MARK_STACK && !defined GC_MALLOC_CHECK
@@ -1117,6 +1134,8 @@
 {
   struct ablock *ablock = block;
   struct ablocks *abase = ABLOCK_ABASE (ablock);
+
+  if (block < initial_brk) return;
 
   MALLOC_BLOCK_INPUT;
 #if GC_MARK_STACK && !defined GC_MALLOC_CHECK