gdb: Remove arm_pc_is_thumb_dummy() and related code.

This is basically an import of the following gdb change:
http://sourceware.org/ml/gdb-cvs/2005-03/msg00143.html (which in effect fixes
problems with gracefully closing down the non-Thumb program being debugged).

1 files changed, 1 insertions, 36 deletions

diff --git a/contrib/gdb/gdb/arm-tdep.c b/contrib/gdb/gdb/arm-tdep.c
index 0034690..128219f 100644
--- a/contrib/gdb/gdb/arm-tdep.c
+++ b/contrib/gdb/gdb/arm-tdep.c
@@ -181,20 +181,6 @@ struct arm_prologue_cache
 
 int arm_apcs_32 = 1;
 
-/* Flag set by arm_fix_call_dummy that tells whether the target
-   function is a Thumb function.  This flag is checked by
-   arm_push_arguments.  FIXME: Change the PUSH_ARGUMENTS macro (and
-   its use in valops.c) to pass the function address as an additional
-   parameter.  */
-
-static int target_is_thumb;
-
-/* Flag set by arm_fix_call_dummy that tells whether the calling
-   function is a Thumb function.  This flag is checked by
-   arm_pc_is_thumb and arm_call_dummy_breakpoint_offset.  */
-
-static int caller_is_thumb;
-
 /* Determine if the program counter specified in MEMADDR is in a Thumb
    function.  */
 
@@ -219,27 +205,6 @@ arm_pc_is_thumb (CORE_ADDR memaddr)
     }
 }
 
-/* Determine if the program counter specified in MEMADDR is in a call
-   dummy being called from a Thumb function.  */
-
-int
-arm_pc_is_thumb_dummy (CORE_ADDR memaddr)
-{
-  CORE_ADDR sp = read_sp ();
-
-  /* FIXME: Until we switch for the new call dummy macros, this heuristic
-     is the best we can do.  We are trying to determine if the pc is on
-     the stack, which (hopefully) will only happen in a call dummy.
-     We hope the current stack pointer is not so far alway from the dummy
-     frame location (true if we have not pushed large data structures or
-     gone too many levels deep) and that our 1024 is not enough to consider
-     code regions as part of the stack (true for most practical purposes).  */
-  if (DEPRECATED_PC_IN_CALL_DUMMY (memaddr, sp, sp + 1024))
-    return caller_is_thumb;
-  else
-    return 0;
-}
-
 /* Remove useless bits from addresses in a running program.  */
 static CORE_ADDR
 arm_addr_bits_remove (CORE_ADDR val)
@@ -2021,7 +1986,7 @@ arm_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
 
-  if (arm_pc_is_thumb (*pcptr) || arm_pc_is_thumb_dummy (*pcptr))
+  if (arm_pc_is_thumb (*pcptr))
     {
       *pcptr = UNMAKE_THUMB_ADDR (*pcptr);
       *lenptr = tdep->thumb_breakpoint_size;