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authorJim Kingdon <jkingdon@engr.sgi.com>1993-09-17 04:54:52 +0000
committerJim Kingdon <jkingdon@engr.sgi.com>1993-09-17 04:54:52 +0000
commitf8efbf2296e731e29df1be4cc391395878846dca (patch)
tree694ef3b40fa1ecd09137a8a92de5c946031548a7 /gdb/config
parente8b114f7f488fc33557c77da584cd3ea8613e388 (diff)
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* config/a29k/tm-a29k.h (FRAME_CHAIN): If rsize is zero, return zero.
Diffstat (limited to 'gdb/config')
-rw-r--r--gdb/config/a29k/tm-a29k.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/gdb/config/a29k/tm-a29k.h b/gdb/config/a29k/tm-a29k.h
index 0b027be..ac102da 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)