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-rw-r--r--src/alloc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/alloc.c b/src/alloc.c
index a0722b42cf4..be2a4fa1bbc 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -4099,6 +4099,11 @@ mark_stack ()
#endif
for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT)
mark_memory ((char *) stack_base + i, end);
+ /* Allow for marking a secondary stack, like the register stack on the
+ ia64. */
+#ifdef GC_MARK_SECONDARY_STACK
+ GC_MARK_SECONDARY_STACK ();
+#endif
#if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS
check_gcpros ();