From: Jim Kingdon <jkingdon@engr.sgi.com>
Date: Fri, 17 Sep 1993 04:54:52 +0000 (+0000)
Subject: * config/a29k/tm-a29k.h (FRAME_CHAIN): If rsize is zero, return zero.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f8efbf2296e731e29df1be4cc391395878846dca;p=binutils-gdb.git

* config/a29k/tm-a29k.h (FRAME_CHAIN): If rsize is zero, return zero.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b0902ad0db0..3dff28e8b51 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+Thu Sep 16 20:37:06 1993  Jim Kingdon  (kingdon@cirdan.cygnus.com)
+
+	* config/a29k/tm-a29k.h (FRAME_CHAIN): If rsize is zero, return zero.
+
 Thu Sep 16 13:16:22 1993  Stu Grossman  (grossman at cygnus.com)
 
 	* infrun.c (wait_for_inferior):  Allow user to single step within
diff --git a/gdb/config/a29k/tm-a29k.h b/gdb/config/a29k/tm-a29k.h
index 0b027bebb46..ac102da06ce 100644
--- a/gdb/config/a29k/tm-a29k.h
+++ b/gdb/config/a29k/tm-a29k.h
@@ -482,7 +482,12 @@ void init_frame_pc ();
 
 /* These are mostly dummies for the a29k because INIT_FRAME_PC
    sets prev->frame instead.  */
-#define FRAME_CHAIN(thisframe) ((thisframe)->frame + (thisframe)->rsize)
+/* If rsize is zero, we must be at end of stack (or otherwise hosed).
+   If we don't check rsize, we loop forever if we see rsize == 0.  */
+#define FRAME_CHAIN(thisframe) \
+  ((thisframe)->rsize == 0 \
+   ? 0 \
+   : (thisframe)->frame + (thisframe)->rsize)
 
 /* Determine if the frame has a 'previous' and back-traceable frame. */
 #define FRAME_IS_UNCHAINED(frame)	((frame)->flags & TRANSPARENT)