gdb/config/m68k/tm-os68k.h

   1 /* Parameters for execution on VxWorks m68k's, for GDB, the GNU debugger.
   2    Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
   3    Contributed by 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #define GDBINIT_FILENAME        ".os68gdbinit"
  22
  23 #define DEFAULT_PROMPT          "(os68k) "
  24
  25 #include "m68k/tm-m68k.h"
  26
  27 /* We have more complex, useful breakpoints on the target.  */
  28 #undef DECR_PC_AFTER_BREAK
  29 #define DECR_PC_AFTER_BREAK     0
  30
  31 /* Takes the current frame-struct pointer and returns the chain-pointer
  32    to get to the calling frame.
  33
  34    If our current frame pointer is zero, we're at the top; else read out
  35    the saved FP from memory pointed to by the current FP.  */
  36
  37 #undef  FRAME_CHAIN
  38 #define FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
  39
  40 /* If the chain pointer is zero (either because the saved value fetched
  41    by FRAME_CHAIN was zero, or because the current FP was zero so FRAME_CHAIN
  42    never fetched anything), we are at the top of the stack.  */
  43 /* We are guaranteed to have a zero frame pointer at bottom of stack, too. */
  44
  45 #undef FRAME_CHAIN_VALID
  46 #define FRAME_CHAIN_VALID(chain, thisframe) nonnull_frame_chain_valid (chain, thisframe)