gdb/config/m68k/tm-delta68.h

   1 /* Target definitions for delta68.
   2    Copyright 1993, 1994, 1998 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,
  19    Boston, MA 02111-1307, 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 #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%"
  27 #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%"
  28
  29 /* Amount PC must be decremented by after a breakpoint.
  30    On the Delta, the kernel decrements it for us.  */
  31
  32 #define DECR_PC_AFTER_BREAK 0
  33
  34 /* Not sure what happens if we try to store this register, but
  35    phdm@info.ucl.ac.be says we need this define.  */
  36
  37 #define CANNOT_STORE_REGISTER(regno)    (regno == FPI_REGNUM)
  38
  39 /* Extract from an array REGBUF containing the (raw) register state
  40    a function return value of type TYPE, and copy that, in virtual format,
  41    into VALBUF.  */
  42
  43 /* When it returns a float/double value, use fp0 in sysV68.  */
  44 /* When it returns a pointer value, use a0 in sysV68.  */
  45
  46 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF)                        \
  47   if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)                                \
  48     REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE,                      \
  49                                  &REGBUF[REGISTER_BYTE (FP0_REGNUM)],   \
  50                                  VALBUF);                               \
  51   else                                                                  \
  52     memcpy ((VALBUF),                                                   \
  53             (char *) ((REGBUF) +                                        \
  54                       (TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 :       \
  55                        (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \
  56             TYPE_LENGTH(TYPE))
  57
  58 /* Write into appropriate registers a function return value
  59    of type TYPE, given in virtual format.  */
  60
  61 /* When it returns a float/double value, use fp0 in sysV68.  */
  62 /* When it returns a pointer value, use a0 in sysV68.  */
  63
  64 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  65   if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)                                \
  66       {                                                                 \
  67         char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)];                   \
  68         REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf);    \
  69         write_register_bytes (REGISTER_BYTE (FP0_REGNUM),               \
  70                               raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
  71       }                                                                 \
  72   else                                                                  \
  73     write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 0), \
  74                           VALBUF, TYPE_LENGTH (TYPE))
  75
  76 /* Return number of args passed to a frame.
  77    Can return -1, meaning no way to tell.  */
  78
  79 extern int delta68_frame_num_args PARAMS ((struct frame_info * fi));
  80 #define FRAME_NUM_ARGS(fi) (delta68_frame_num_args ((fi)))
  81
  82 /* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear
  83    the processor's instruction cache as it should.  */
  84 #define CLEAR_INSN_CACHE()      clear_insn_cache()
  85
  86 #include "m68k/tm-m68k.h"
  87
  88 /* Extract from an array REGBUF containing the (raw) register state
  89    the address in which a function should return its structure value,
  90    as a CORE_ADDR (or an expression that can be used as one).  */
  91
  92 #undef EXTRACT_STRUCT_VALUE_ADDRESS
  93 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\
  94         (*(CORE_ADDR *)((char*)(REGBUF) + 8 * 4))