gdb/config/m68k/tm-news.h

   1 /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
   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 /* See following cpu type determination macro to get the machine type.
  21
  22 Here is an m-news.h file for gdb.  It supports the 68881 registers.
  23                                            by hikichi@srava.sra.junet
  24
  25 * Ptrace for handling floating register has a bug(before NEWS OS version 2.2),
  26 * After NEWS OS version 3.2, some of ptrace's bug is fixed.
  27   But we cannot change the floating register(see adb(1) in OS 3.2) yet.  */
  28
  29 /* Extract from an array REGBUF containing the (raw) register state
  30    a function return value of type TYPE, and copy that, in virtual format,
  31    into VALBUF.  */
  32
  33 /* when it return the floating value, use the FP0 in NEWS.  */
  34 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  35   { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
  36       { \
  37         REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
  38                                      &REGBUF[REGISTER_BYTE (FP0_REGNUM)], \
  39                                      VALBUF); \
  40       } \
  41     else \
  42       memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE)); }
  43
  44 /* Write into appropriate registers a function return value
  45    of type TYPE, given in virtual format.  */
  46
  47 /* when it return the floating value, use the FP0 in NEWS.  */
  48 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  49   { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
  50       { \
  51         char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
  52         REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \
  53         write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
  54                               raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
  55       } \
  56     else \
  57       write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); }
  58
  59 /* Return number of args passed to a frame.
  60    Can return -1, meaning no way to tell.  */
  61
  62 extern int news_frame_num_args PARAMS ((struct frame_info *fi));
  63 #define FRAME_NUM_ARGS (news_frame_num_args ((fi)))
  64
  65 #include "m68k/tm-m68k.h"