gdb/config/m68k/tm-vx68.h

   1 /* Target machine description for VxWorks m68k's, for GDB, the GNU debugger.
   2    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000,
   3    2002, 2003
   4    Free Software Foundation, Inc.
   5    Contributed by Cygnus Support.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 /* GCC is probably the only compiler used on this configuration.  So
  25    get this right even if the code which detects gcc2_compiled. is
  26    still broken.  */
  27
  28 #define BELIEVE_PCC_PROMOTION 1
  29
  30 /* We have more complex, useful breakpoints on the target.  */
  31 #define DECR_PC_AFTER_BREAK     0
  32
  33 #include "m68k/tm-m68k.h"
  34 #include "config/tm-vxworks.h"
  35
  36 /* Takes the current frame-struct pointer and returns the chain-pointer
  37    to get to the calling frame.
  38
  39    If our current frame pointer is zero, we're at the top; else read out
  40    the saved FP from memory pointed to by the current FP.  */
  41
  42 #undef  DEPRECATED_FRAME_CHAIN
  43 #define DEPRECATED_FRAME_CHAIN(thisframe) ((thisframe)->frame? read_memory_integer ((thisframe)->frame, 4): 0)
  44
  45 /* FIXME, Longjmp information stolen from Sun-3 config.  Dunno if right.  */
  46 /* Offsets (in target ints) into jmp_buf.  Not defined by Sun, but at least
  47    documented in a comment in <machine/setjmp.h>! */
  48
  49 #define JB_ELEMENT_SIZE 4
  50
  51 #define JB_ONSSTACK 0
  52 #define JB_SIGMASK 1
  53 #define JB_SP 2
  54 #define JB_PC 3
  55 #define JB_PSL 4
  56 #define JB_D2 5
  57 #define JB_D3 6
  58 #define JB_D4 7
  59 #define JB_D5 8
  60 #define JB_D6 9
  61 #define JB_D7 10
  62 #define JB_A2 11
  63 #define JB_A3 12
  64 #define JB_A4 13
  65 #define JB_A5 14
  66 #define JB_A6 15
  67
  68 /* Figure out where the longjmp will land.  Slurp the args out of the stack.
  69    We expect the first arg to be a pointer to the jmp_buf structure from which
  70    we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
  71    This routine returns true on success */
  72
  73 #define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)
  74
  75 /* Number of registers in a ptrace_getfpregs call. */
  76
  77 #define VX_SIZE_FPREGS (8 * DEPRECATED_REGISTER_RAW_SIZE (FP0_REGNUM) \
  78                         + (3 * DEPRECATED_REGISTER_SIZE))