[thirdparty/binutils-gdb.git] / gdb / config / m68k / tm-delta68.h

/* Target definitions for delta68.
   Copyright 1993, 1994, 1998 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.  */

/* Define BPT_VECTOR if it is different than the default.
   This is the vector number used by traps to indicate a breakpoint. */

#define BPT_VECTOR 0x1

#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%"
#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%"

/* Amount PC must be decremented by after a breakpoint.
   On the Delta, the kernel decrements it for us.  */

#define DECR_PC_AFTER_BREAK 0

/* Not sure what happens if we try to store this register, but
   phdm@info.ucl.ac.be says we need this define.  */

#define CANNOT_STORE_REGISTER(regno)	(regno == FPI_REGNUM)

/* 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 returns a float/double value, use fp0 in sysV68.  */
/* When it returns a pointer value, use a0 in sysV68.  */

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF)			\
  if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)				\
    REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE,			\
				 &REGBUF[REGISTER_BYTE (FP0_REGNUM)],	\
				 VALBUF);				\
  else									\
    memcpy ((VALBUF),							\
	    (char *) ((REGBUF) +					\
		      (TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 :	\
		       (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \
	    TYPE_LENGTH(TYPE))

/* Write into appropriate registers a function return value
   of type TYPE, given in virtual format.  */

/* When it returns a float/double value, use fp0 in sysV68.  */
/* When it returns a pointer value, use a0 in sysV68.  */

#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 ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 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; }

/* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear
   the processor's instruction cache as it should.  */
#define CLEAR_INSN_CACHE()	clear_insn_cache()

#include "m68k/tm-m68k.h"

/* Extract from an array REGBUF containing the (raw) register state
   the address in which a function should return its structure value,
   as a CORE_ADDR (or an expression that can be used as one).  */

#undef EXTRACT_STRUCT_VALUE_ADDRESS
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\
	(*(CORE_ADDR *)((char*)(REGBUF) + 8 * 4))
Commit	Line	Data
c649a7c2	1	/* Target definitions for delta68.
4434e2dc	2	Copyright 1993, 1994, 1998 Free Software Foundation, Inc.
c649a7c2 JK	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
6c9638b4	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
c649a7c2 JK	19
	20	/* Define BPT_VECTOR if it is different than the default.
	21	This is the vector number used by traps to indicate a breakpoint. */
	22
	23	#define BPT_VECTOR 0x1
	24
c649a7c2 JK	25	#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%"
	26	#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%"
	27
	28	/* Amount PC must be decremented by after a breakpoint.
	29	On the Delta, the kernel decrements it for us. */
	30
	31	#define DECR_PC_AFTER_BREAK 0
	32
522b9962 JK	33	/* Not sure what happens if we try to store this register, but
522b9962 JK	34	phdm@info.ucl.ac.be says we need this define. */
ca3c57e5	35
522b9962 JK	36	#define CANNOT_STORE_REGISTER(regno) (regno == FPI_REGNUM)
522b9962 JK	37
ca3c57e5 SS	38	/* Extract from an array REGBUF containing the (raw) register state
	39	a function return value of type TYPE, and copy that, in virtual format,
	40	into VALBUF. */
	41
4434e2dc	42	/* When it returns a float/double value, use fp0 in sysV68. */
ca3c57e5 SS	43	/* When it returns a pointer value, use a0 in sysV68. */
ca3c57e5 SS	44
4434e2dc JM	45	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
4434e2dc JM	46	if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
75a1d67a	47	REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
4434e2dc JM	48	&REGBUF[REGISTER_BYTE (FP0_REGNUM)], \
	49	VALBUF); \
	50	else \
	51	memcpy ((VALBUF), \
	52	(char *) ((REGBUF) + \
	53	(TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : \
	54	(TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \
	55	TYPE_LENGTH(TYPE))
ca3c57e5 SS	56
	57	/* Write into appropriate registers a function return value
	58	of type TYPE, given in virtual format. */
	59
4434e2dc	60	/* When it returns a float/double value, use fp0 in sysV68. */
ca3c57e5 SS	61	/* When it returns a pointer value, use a0 in sysV68. */
	62
	63	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
4434e2dc JM	64	if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
	65	{ \
	66	char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
75a1d67a JM	67	REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \
75a1d67a JM	68	write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
4434e2dc JM	69	raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
	70	} \
	71	else \
	72	write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 0), \
	73	VALBUF, TYPE_LENGTH (TYPE))
	74
75a1d67a JM	75	/* Return number of args passed to a frame.
	76	Can return -1, meaning no way to tell. */
	77
	78	#define FRAME_NUM_ARGS(val, fi) \
	79	{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
	80	register int insn = 0177777 & read_memory_integer (pc, 2); \
	81	val = 0; \
	82	if (insn == 0047757 \|\| insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
	83	val = read_memory_integer (pc + 2, 2); \
	84	else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
	85	\|\| (insn & 0170777) == 0050117) /* addqw */ \
	86	{ val = (insn >> 9) & 7; if (val == 0) val = 8; } \
	87	else if (insn == 0157774) /* addal #WW, sp */ \
	88	val = read_memory_integer (pc + 2, 4); \
	89	val >>= 2; }
	90
4434e2dc JM	91	/* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear
	92	the processor's instruction cache as it should. */
	93	#define CLEAR_INSN_CACHE() clear_insn_cache()
ca3c57e5	94
c649a7c2	95	#include "m68k/tm-m68k.h"
4434e2dc JM	96
	97	/* Extract from an array REGBUF containing the (raw) register state
	98	the address in which a function should return its structure value,
	99	as a CORE_ADDR (or an expression that can be used as one). */
	100
	101	#undef EXTRACT_STRUCT_VALUE_ADDRESS
	102	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\
	103	((CORE_ADDR )((char)(REGBUF) + 8 4))