gdb/config/m68k/tm-amix.h

   1 /* Macro definitions for GDB on a Commodore Amiga running SVR4 (amix).
   2    Copyright (C) 1991, Free Software Foundation, Inc.
   3    Written by Fred Fish at Cygnus Support (fnf@cygint)
   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 /* Define BPT_VECTOR if it is different than the default.
  22    This is the vector number used by traps to indicate a breakpoint. */
  23
  24 #define BPT_VECTOR 0x1
  25
  26 /* How much to decrement the PC after a trap.  Depends on kernel. */
  27
  28 #define DECR_PC_AFTER_BREAK 0           /* No decrement required */
  29
  30 /* Use the alternate method of determining valid frame chains. */
  31
  32 #define FRAME_CHAIN_VALID_ALTERNATE
  33
  34 #include "tm-sysv4.h"
  35 #include "m68k/tm-m68k.h"
  36
  37 /* Offsets (in target ints) into jmp_buf.  Not defined in any system header
  38    file, so we have to step through setjmp/longjmp with a debugger and figure
  39    them out.  As a double check, note that <setjmp> defines _JBLEN as 13,
  40    which matches the number of elements we see saved by setjmp(). */
  41
  42 #define JB_ELEMENT_SIZE sizeof(int)     /* jmp_buf[_JBLEN] is array of ints */
  43
  44 #define JB_D2   0
  45 #define JB_D3   1
  46 #define JB_D4   2
  47 #define JB_D5   3
  48 #define JB_D6   4
  49 #define JB_D7   5
  50 #define JB_A1   6
  51 #define JB_A2   7
  52 #define JB_A3   8
  53 #define JB_A4   9
  54 #define JB_A5   10
  55 #define JB_A6   11
  56 #define JB_A7   12
  57
  58 #define JB_PC   JB_A1   /* Setjmp()'s return PC saved in A1 */
  59
  60 /* Figure out where the longjmp will land.  Slurp the args out of the stack.
  61    We expect the first arg to be a pointer to the jmp_buf structure from which
  62    we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
  63    This routine returns true on success */
  64
  65 #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)