gdb/config/m68k/tm-altos.h

   1 /* Target definitions for GDB on an Altos 3068 (m68k running SVR2)
   2    Copyright 1987, 1989, 1991, 1993 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* The child target can't deal with floating registers.  */
  21 #define CANNOT_STORE_REGISTER(regno) ((regno) >= FP0_REGNUM)
  22
  23 /* Define BPT_VECTOR if it is different than the default.
  24    This is the vector number used by traps to indicate a breakpoint. */
  25
  26 #define BPT_VECTOR 0xe
  27
  28 /* Address of end of stack space.  */
  29
  30 /*#define STACK_END_ADDR (0xffffff)*/
  31 #define STACK_END_ADDR (0x1000000)
  32
  33 /* Amount PC must be decremented by after a breakpoint.
  34    On the Altos, the kernel resets the pc to the trap instr */
  35
  36 #define DECR_PC_AFTER_BREAK 0
  37
  38 /* The only reason this is here is the tm-altos.h reference below.  It
  39    was moved back here from tm-m68k.h.  FIXME? */
  40
  41 #define SKIP_PROLOGUE(pc)   \
  42 { register int op = read_memory_integer (pc, 2);        \
  43   if (op == 0047126)                                    \
  44     pc += 4;   /* Skip link #word */                    \
  45   else if (op == 0044016)                               \
  46     pc += 6;   /* Skip link #long */                    \
  47   /* Not sure why branches are here.  */                \
  48   /* From tm-isi.h, tm-altos.h */                       \
  49   else if (op == 0060000)                               \
  50     pc += 4;   /* Skip bra #word */                     \
  51   else if (op == 00600377)                              \
  52     pc += 6;   /* skip bra #long */                     \
  53   else if ((op & 0177400) == 0060000)                   \
  54     pc += 2;   /* skip bra #char */                     \
  55 }
  56
  57 #include "m68k/tm-m68k.h"