gdb/tm-altos.h

   1 /* Definitions to make GDB run on an Altos 3068 (m68k running SVR2)
   2    Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Define BPT_VECTOR if it is different than the default.
  21    This is the vector number used by traps to indicate a breakpoint. */
  22
  23 #define BPT_VECTOR 0xe
  24
  25 /* Define this if the C compiler puts an underscore at the front
  26    of external names before giving them to the linker.  */
  27
  28 #undef NAMES_HAVE_UNDERSCORE
  29
  30 /* COFF files don't have long filenames.  */
  31
  32 #define COFF_NO_LONG_FILE_NAMES
  33
  34 /* Address of end of stack space.  */
  35
  36 /*#define STACK_END_ADDR (0xffffff)*/
  37 #define STACK_END_ADDR (0x1000000)
  38
  39 /* Amount PC must be decremented by after a breakpoint.
  40    On the Altos, the kernel resets the pc to the trap instr */
  41
  42 #define DECR_PC_AFTER_BREAK 0
  43
  44 /* The only reason this is here is the tm-altos.h reference below.  It
  45    was moved back here from tm-68k.h.  FIXME? */
  46
  47 #define SKIP_PROLOGUE(pc)   \
  48 { register int op = read_memory_integer (pc, 2);        \
  49   if (op == 0047126)                                    \
  50     pc += 4;   /* Skip link #word */                    \
  51   else if (op == 0044016)                               \
  52     pc += 6;   /* Skip link #long */                    \
  53   /* Not sure why branches are here.  */                \
  54   /* From tm-isi.h, tm-altos.h */                       \
  55   else if (op == 0060000)                               \
  56     pc += 4;   /* Skip bra #word */                     \
  57   else if (op == 00600377)                              \
  58     pc += 6;   /* skip bra #long */                     \
  59   else if ((op & 0177400) == 0060000)                   \
  60     pc += 2;   /* skip bra #char */                     \
  61 }
  62
  63 #include "tm-68k.h"