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/* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
Copyright 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* See following cpu type determination macro to get the machine type.
Here is an m-news.h file for gdb. It supports the 68881 registers.
by hikichi@srava.sra.junet
* Ptrace for handling floating register has a bug(before NEWS OS version 2.2),
* After NEWS OS version 3.2, some of ptrace's bug is fixed.
But we cannot change the floating register(see adb(1) in OS 3.2) yet. */
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
into VALBUF. */
/* when it return the floating value, use the FP0 in NEWS. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
{ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
{ \
REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
®BUF[REGISTER_BYTE (FP0_REGNUM)], \
VALBUF); \
} \
else \
memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE)); }
/* Write into appropriate registers a function return value
of type TYPE, given in virtual format. */
/* when it return the floating value, use the FP0 in NEWS. */
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
{ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
{ \
char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \
write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
} \
else \
write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); }
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
#define FRAME_NUM_ARGS(val, fi) \
{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
register int insn = 0177777 & read_memory_integer (pc, 2); \
val = 0; \
if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
val = read_memory_integer (pc + 2, 2); \
else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
|| (insn & 0170777) == 0050117) /* addqw */ \
{ val = (insn >> 9) & 7; if (val == 0) val = 8; } \
else if (insn == 0157774) /* addal #WW, sp */ \
val = read_memory_integer (pc + 2, 4); \
val >>= 2; }
#include "m68k/tm-m68k.h"
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