--- smalltalk-3.0.1/sigsegv/src/handler-unix.c~	2008-01-22 11:14:33.000000000 +0100
+++ smalltalk-3.0.1/sigsegv/src/handler-unix.c	2008-02-07 13:31:13.000000000 +0100
@@ -462,8 +462,10 @@
     {
       int dummy;
       remember_stack_top (&dummy);
-      if (!stack_top)
-        return -1;
+      if (!stack_top) {
+	      extern void *__libc_stack_end;
+	      stack_top = __libc_stack_end;
+      }
     }
 #endif
 
--- smalltalk-3.0.1/sigsegv/src/stackvma-linux.c~	2008-01-22 11:14:33.000000000 +0100
+++ smalltalk-3.0.1/sigsegv/src/stackvma-linux.c	2008-02-07 13:31:57.000000000 +0100
@@ -51,7 +51,8 @@
         break;
       while (c = getc (fp), c != EOF && c != '\n')
         continue;
-      if (address >= start && address <= end - 1)
+      if (address >= start && address <= end - 1 &&
+		      (start != end /* ignore maps hidden by PaX */))
         {
           vma->start = start;
           vma->end = end;