* target.h (target_object): Add TARGET_OBJECT_WCOOKIE.

[deliverable/binutils-gdb.git] / gdb / sparc-tdep.c

diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index 1719109ac288981afef713b736474c699b69e83b..bbe56652096b289263d4323ef1ea69de8f3c56fe 100644 (file)
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -141,13 +141,21 @@ sparc_fetch_instruction (CORE_ADDR pc)
 ULONGEST
 sparc_fetch_wcookie (void)
 {
-  /* FIXME: kettenis/20040131: We should fetch the cookie from the
-     target.  For now, return zero, which is right for targets without
-     StackGhost.  */
-  return 0;
-}
+  struct target_ops *ops = &current_target;
+  char buf[8];
+  int len;
+
+  len = target_read_partial (ops, TARGET_OBJECT_WCOOKIE, NULL, buf, 0, 8);
+  if (len == -1)
+    return 0;
+
+  /* We should have either an 32-bit or an 64-bit cookie.  */
+  gdb_assert (len == 4 || len == 8);
 
+  return extract_unsigned_integer (buf, len);
+}
 \f
+
 /* Return the contents if register REGNUM as an address.  */
 
 static CORE_ADDR