[deliverable/binutils-gdb.git] / gdb / tm-news.h

/* 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., 675 Mass Ave, Cambridge, MA 02139, 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
  
* Support Sun assembly format instead of Motorola one.
* 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.  */

#define HAVE_68881

/* Use to compute STACK_END_ADDR.  */
#define TARGET_UPAGES 2
#define TARGET_NBPG 4096

/* Address of end of stack space.  */

#define STACK_END_ADDR (0x80000000 - TARGET_UPAGES * TARGET_NBPG)

/* 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, \
			       &REGBUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \
      } \
    else \
      bcopy (REGBUF, VALBUF, 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 (FP0_REGNUM, VALBUF, raw_buf); \
	write_register_bytes (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 "tm-68k.h"
Commit	Line	Data
dd3b648e	1	/* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
58dbaabd	2	Copyright 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
dd3b648e RP	3
	4	This file is part of GDB.
	5
99a7de40	6	This program is free software; you can redistribute it and/or modify
dd3b648e	7	it under the terms of the GNU General Public License as published by
99a7de40 JG	8	the Free Software Foundation; either version 2 of the License, or
99a7de40 JG	9	(at your option) any later version.
dd3b648e	10
99a7de40	11	This program is distributed in the hope that it will be useful,
dd3b648e RP	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
99a7de40 JG	17	along with this program; if not, write to the Free Software
99a7de40 JG	18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
dd3b648e RP	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	* Support Sun assembly format instead of Motorola one.
	26	* Ptrace for handling floating register has a bug(before NEWS OS version 2.2),
	27	* After NEWS OS version 3.2, some of ptrace's bug is fixed.
	28	But we cannot change the floating register(see adb(1) in OS 3.2) yet. */
	29
84d82b1c FF	30	#define HAVE_68881
84d82b1c FF	31
dd3b648e RP	32	/* Use to compute STACK_END_ADDR. */
	33	#define TARGET_UPAGES 2
	34	#define TARGET_NBPG 4096
	35
	36	/* Address of end of stack space. */
	37
	38	#define STACK_END_ADDR (0x80000000 - TARGET_UPAGES * TARGET_NBPG)
	39
	40	/* Extract from an array REGBUF containing the (raw) register state
	41	a function return value of type TYPE, and copy that, in virtual format,
	42	into VALBUF. */
	43
	44	/* when it return the floating value, use the FP0 in NEWS. */
	45	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
	46	{ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
	47	{ \
	48	REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, \
	49	&REGBUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \
	50	} \
	51	else \
	52	bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE)); }
	53
	54	/* Write into appropriate registers a function return value
	55	of type TYPE, given in virtual format. */
	56
	57	/* when it return the floating value, use the FP0 in NEWS. */
	58	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
	59	{ if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
	60	{ \
	61	char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
	62	REGISTER_CONVERT_TO_RAW (FP0_REGNUM, VALBUF, raw_buf); \
	63	write_register_bytes (FP0_REGNUM, \
	64	raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
	65	} \
	66	else \
	67	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); }
	68
	69	/* Return number of args passed to a frame.
	70	Can return -1, meaning no way to tell. */
	71
	72	#define FRAME_NUM_ARGS(val, fi) \
	73	{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
	74	register int insn = 0177777 & read_memory_integer (pc, 2); \
	75	val = 0; \
	76	if (insn == 0047757 \|\| insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
	77	val = read_memory_integer (pc + 2, 2); \
	78	else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
	79	\|\| (insn & 0170777) == 0050117) /* addqw */ \
	80	{ val = (insn >> 9) & 7; if (val == 0) val = 8; } \
	81	else if (insn == 0157774) /* addal #WW, sp */ \
	82	val = read_memory_integer (pc + 2, 4); \
	83	val >>= 2; }
	84
dd3b648e	85	#include "tm-68k.h"