gdb/config/m68k/tm-est.h

   1 /* Target machine description for EST-300, for GDB, the GNU debugger.
   2    Copyright 1994 Free Software Foundation, Inc.
   3    Contributed by Steve Chamberlain @ Cygnus Support.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 /* GCC is probably the only compiler used on this configuration.  So
  23    get this right even if the code which detects gcc2_compiled. is
  24    still broken.  */
  25
  26 #define BELIEVE_PCC_PROMOTION 1
  27
  28 /* We have more complex, useful breakpoints on the target.  */
  29 #define DECR_PC_AFTER_BREAK     0
  30
  31 #include "m68k/tm-m68k.h"
  32
  33 #undef FRAME_CHAIN
  34 #undef FRAME_CHAIN_VALID
  35
  36 /* Takes the current frame-struct pointer and returns the chain-pointer
  37    to get to the calling frame.
  38
  39    If our current frame pointer is zero, we're at the top; else read out
  40    the saved FP from memory pointed to by the current FP.  */
  41
  42 #define FRAME_CHAIN(thisframe) \
  43   ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
  44
  45 /* If the chain pointer is zero (either because the saved value fetched
  46    by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
  47    never fetched anything), we are at the top of the stack.  */
  48
  49 #define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)