* s390-tdep.c (s390_pop_frame_regular): On the S/390, the frame

pointer and the SP are often the same, so we can't pop the frame
by setting the SP to the FP; we need to get the old SP from
saved_regs.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5f245cc..f13b54a 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2001-11-14  Jim Blandy  <jimb@redhat.com>
 
+       * s390-tdep.c (s390_pop_frame_regular): On the S/390, the frame
+       pointer and the SP are often the same, so we can't pop the frame
+       by setting the SP to the FP; we need to get the old SP from
+       saved_regs.
+
        * s390-tdep.c (s390_extract_return_value): Returned `float' values
        can simply be copied bitwise from the registers into the value
        object's buffer.

diff --git a/gdb/s390-tdep.c b/gdb/s390-tdep.c
index 632261e..d2fa1a0 100644 (file)
--- a/gdb/s390-tdep.c
+++ b/gdb/s390-tdep.c
@@ -1169,8 +1169,10 @@ s390_pop_frame_regular (struct frame_info *frame)
         write_register (regnum, value);
       }
 
-  /* Actually cut back the stack.  */
-  write_register (S390_SP_REGNUM, FRAME_FP (frame));
+  /* Actually cut back the stack.  Remember that the SP's element of
+     saved_regs is the old SP itself, not the address at which it is
+     saved.  */
+  write_register (S390_SP_REGNUM, frame->saved_regs[S390_SP_REGNUM]);
 
   /* Throw away any cached frame information.  */
   flush_cached_frames ();