| 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" |