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

/* Parameters for execution on a 68000 series machine.
   Copyright 1986, 1987, 1989, 1990, 1992, 1993, 1994, 1995, 1996, 1998,
   1999, 2000 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.  */

#include "regcache.h"

#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL

/* Generic 68000 stuff, to be included by other tm-*.h files.  */

/* struct frame_info; */

/* D0_REGNM and A0_REGNUM must be defined here because they are
   used by the monitor.  */

#define D0_REGNUM 0
#define A0_REGNUM 8

/* Sequence of bytes for breakpoint instruction.
   This is a TRAP instruction.  The last 4 bits (0xf below) is the
   vector.  Systems which don't use 0xf should define BPT_VECTOR
   themselves before including this file.  */

#if !GDB_MULTI_ARCH
#if !defined (BPT_VECTOR)
#define BPT_VECTOR 0xf
#endif

#if !defined (BREAKPOINT)
#define BREAKPOINT {0x4e, (0x40 | BPT_VECTOR)}
#endif

/* We default to vector 1 for the "remote" target, but allow targets
   to override.  */
#if !defined (REMOTE_BPT_VECTOR)
#define REMOTE_BPT_VECTOR 1
#endif
#endif

#if !GDB_MULTI_ARCH
#if !defined (REMOTE_BREAKPOINT)
#define REMOTE_BREAKPOINT {0x4e, (0x40 | REMOTE_BPT_VECTOR)}
#endif
#endif

#if !GDB_MULTI_ARCH
#define REGISTER_BYTES_FP (16*4 + 8 + 8*12 + 3*4)
#define REGISTER_BYTES_NOFP (16*4 + 8)


#define NUM_FREGS (NUM_REGS-24)


/* This was determined by experimentation on hp300 BSD 4.3.  Perhaps
   it corresponds to some offset in /usr/include/sys/user.h or
   something like that.  Using some system include file would
   have the advantage of probably being more robust in the face
   of OS upgrades, but the disadvantage of being wrong for
   cross-debugging.  */

#define SIG_PC_FP_OFFSET 530

/* Offset from SP to first arg on stack at first instruction of a function */

#define SP_ARG0 (1 * 4)

#define TARGET_M68K
#endif

#if !GDB_MULTI_ARCH
#define TARGET_LONG_DOUBLE_FORMAT &floatformat_m68881_ext

#define TARGET_LONG_DOUBLE_BIT 96

/* Offset from address of function to start of its code.
   Zero on most machines.  */

#define FUNCTION_START_OFFSET 0

/* Advance PC across any function entry prologue instructions
   to reach some "real" code.  */

#if !defined(SKIP_PROLOGUE)
#define SKIP_PROLOGUE(ip) (m68k_skip_prologue (ip))
#endif
#endif
extern CORE_ADDR m68k_skip_prologue (CORE_ADDR ip);


/* Immediately after a function call, return the saved pc.
   Can't always go through the frames for this because on some machines
   the new frame is not set up until the new function executes
   some instructions.  */

#if !GDB_MULTI_ARCH
extern CORE_ADDR m68k_saved_pc_after_call (struct frame_info *);

#define SAVED_PC_AFTER_CALL(frame) \
  m68k_saved_pc_after_call(frame)
#endif

/* Stack grows downward.  */

#if !GDB_MULTI_ARCH
#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))

/* Stack must be kept short aligned when doing function calls.  */

#define STACK_ALIGN(ADDR) (((ADDR) + 1) & ~1)
#endif

/* If your kernel resets the pc after the trap happens you may need to
   define this before including this file.  */

#if !GDB_MULTI_ARCH
#if !defined (DECR_PC_AFTER_BREAK)
#define DECR_PC_AFTER_BREAK 2
#endif
#endif

#if !GDB_MULTI_ARCH
#ifndef NUM_REGS
#define NUM_REGS 29
#endif
#endif

/* Say how long (ordinary) registers are.  This is a piece of bogosity
   used in push_word and a few other places; REGISTER_RAW_SIZE is the
   real way to know how big a register is.  */

#if !GDB_MULTI_ARCH
#define REGISTER_SIZE 4
#endif

#if !GDB_MULTI_ARCH
#ifndef REGISTER_BYTES_OK
#define REGISTER_BYTES_OK(b) \
   ((b) == REGISTER_BYTES_FP \
    || (b) == REGISTER_BYTES_NOFP)
#endif

#ifndef REGISTER_BYTES
#define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4)
#endif
#endif /* multi-arch */

/* Index within `registers' of the first byte of the space for
   register N.  */

#if !GDB_MULTI_ARCH
#define REGISTER_BYTE(N)  \
 ((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168	\
  : (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72	\
  : (N) * 4)
#endif

/* Number of bytes of storage in the actual machine representation
   for register N.  On the 68000, all regs are 4 bytes
   except the floating point regs which are 12 bytes.  */
/* Note that the unsigned cast here forces the result of the
   subtraction to very high positive values if N < FP0_REGNUM */
#if !GDB_MULTI_ARCH
#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)

/* Number of bytes of storage in the program's representation
   for register N.  On the 68000, all regs are 4 bytes
   except the floating point regs which are 12-byte long doubles.  */

#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)

/* Largest value REGISTER_RAW_SIZE can have.  */

#define MAX_REGISTER_RAW_SIZE 12

/* Largest value REGISTER_VIRTUAL_SIZE can have.  */

#define MAX_REGISTER_VIRTUAL_SIZE 12
#endif /* multi-arch */

/* Return the GDB type object for the "standard" data type of data 
   in register N.  This should be int for D0-D7, long double for FP0-FP7,
   and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc).
   Note, for registers which contain addresses return pointer to void, 
   not pointer to char, because we don't want to attempt to print 
   the string after printing the address.  */
#if !GDB_MULTI_ARCH
#define REGISTER_VIRTUAL_TYPE(N) \
  ((unsigned) (N) >= FPC_REGNUM ? lookup_pointer_type (builtin_type_void) : \
   (unsigned) (N) >= FP0_REGNUM ? builtin_type_long_double :                \
   (unsigned) (N) >=  A0_REGNUM ? lookup_pointer_type (builtin_type_void) : \
   builtin_type_int)
#endif
/* Initializer for an array of names of registers.
   Entries beyond the first NUM_REGS are ignored.  */

#if !GDB_MULTI_ARCH
#define REGISTER_NAMES  \
 {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
  "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \
  "ps", "pc",  \
  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
  "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
#endif

/* Register numbers of various important registers.
   Note that some of these values are "real" register numbers,
   and correspond to the general registers of the machine,
   and some are "phony" register numbers which are too large
   to be actual register numbers as far as the user is concerned
   but do serve to get the desired values when passed to read_register.  */

#if !GDB_MULTI_ARCH

#define A1_REGNUM 9
#define FP_REGNUM 14		/* Contains address of executing stack frame */
#define SP_REGNUM 15		/* Contains address of top of stack */
#define PS_REGNUM 16		/* Contains processor status */
#define PC_REGNUM 17		/* Contains program counter */
#define FP0_REGNUM 18		/* Floating point register 0 */
#define FPC_REGNUM 26		/* 68881 control register */
#define FPS_REGNUM 27		/* 68881 status register */
#define FPI_REGNUM 28		/* 68881 iaddr register */
#endif

/* Store the address of the place in which to copy the structure the
   subroutine will return.  This is called from call_function. */
#if !GDB_MULTI_ARCH
#define STORE_STRUCT_RETURN(ADDR, SP) \
  { write_register (A1_REGNUM, (ADDR)); }

/* 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.  This is assuming that floating point values are returned
   as doubles in d0/d1.  */

#if !defined (DEPRECATED_EXTRACT_RETURN_VALUE)
#define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  memcpy ((VALBUF),							\
	  (char *)(REGBUF) +						\
	         (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)),	\
	  TYPE_LENGTH(TYPE))
#endif
#endif /* multi-arch */

/* Write into appropriate registers a function return value
   of type TYPE, given in virtual format.  Assumes floats are passed
   in d0/d1.  */

#if !GDB_MULTI_ARCH
#if !defined (STORE_RETURN_VALUE)
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
  write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
#endif

/* 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).  */

#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
#endif /* multi-arch */
\f
/* Describe the pointer in each stack frame to the previous stack frame
   (its caller).  */

/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
   chain-pointer.
   In the case of the 68000, the frame's nominal address
   is the address of a 4-byte word containing the calling frame's address.  */

/* If we are chaining from sigtramp, then manufacture a sigtramp frame
   (which isn't really on the stack.  I'm not sure this is right for anything
   but BSD4.3 on an hp300.  */
#if !GDB_MULTI_ARCH
#define FRAME_CHAIN(thisframe)  \
  (thisframe->signal_handler_caller \
   ? thisframe->frame \
   : (!inside_entry_file ((thisframe)->pc) \
      ? read_memory_integer ((thisframe)->frame, 4) \
      : 0))
#endif

/* Define other aspects of the stack frame.  */

/* A macro that tells us whether the function invocation represented
   by FI does not have a frame on the stack associated with it.  If it
   does not, FRAMELESS is set to 1, else 0.  */
#if !GDB_MULTI_ARCH
#define FRAMELESS_FUNCTION_INVOCATION(FI) \
     (((FI)->signal_handler_caller) ? 0 : frameless_look_for_prologue(FI))
#endif


#if !GDB_MULTI_ARCH
#define FRAME_SAVED_PC(FRAME) \
  (((FRAME)->signal_handler_caller \
    ? ((FRAME)->next \
       ? read_memory_integer ((FRAME)->next->frame + SIG_PC_FP_OFFSET, 4) \
       : read_memory_integer (read_register (SP_REGNUM) \
			      + SIG_PC_FP_OFFSET - 8, 4) \
       ) \
    : read_memory_integer ((FRAME)->frame + 4, 4)) \
   )
#endif

#if !GDB_MULTI_ARCH
#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)

#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
#endif

/* Set VAL to the number of args passed to frame described by FI.
   Can set VAL to -1, meaning no way to tell.  */

/* We can't tell how many args there are
   now that the C compiler delays popping them.  */
#if !GDB_MULTI_ARCH
#if !defined (FRAME_NUM_ARGS)
#define FRAME_NUM_ARGS(fi) (-1)
#endif


/* Return number of bytes at start of arglist that are not really args.  */

#define FRAME_ARGS_SKIP 8
#endif

/* Put here the code to store, into a struct frame_saved_regs,
   the addresses of the saved registers of frame described by FRAME_INFO.
   This includes special registers such as pc and fp saved in special
   ways in the stack frame.  sp is even more special:
   the address we return for it IS the sp for the next frame.  */

#if !GDB_MULTI_ARCH
#if !defined (FRAME_INIT_SAVED_REGS)
#define FRAME_INIT_SAVED_REGS(fi) m68k_frame_init_saved_regs ((fi))
void m68k_frame_init_saved_regs (struct frame_info *frame_info);
#endif /* no FRAME_INIT_SAVED_REGS.  */
#endif
\f

/* Things needed for making the inferior call functions.  */

/* The CALL_DUMMY macro is the sequence of instructions, as disassembled
   by gdb itself:

   These instructions exist only so that m68k_find_saved_regs can parse
   them as a "prologue"; they are never executed.

   fmovemx fp0-fp7,sp@-                 0xf227 0xe0ff
   moveml d0-a5,sp@-                    0x48e7 0xfffc
   clrw sp@-                            0x4267
   movew ccr,sp@-                               0x42e7

   The arguments are pushed at this point by GDB; no code is needed in
   the dummy for this.  The CALL_DUMMY_START_OFFSET gives the position
   of the following jsr instruction.  That is where we start
   executing.

   jsr @#0x32323232                     0x4eb9 0x3232 0x3232
   addal #0x69696969,sp                 0xdffc 0x6969 0x6969
   trap #<your BPT_VECTOR number here>  0x4e4?
   nop                                  0x4e71

   Note this is CALL_DUMMY_LENGTH bytes (28 for the above example).

   The dummy frame always saves the floating-point registers, whether they
   actually exist on this target or not.  */

/* FIXME: Wrong to hardwire this as BPT_VECTOR when sometimes it
   should be REMOTE_BPT_VECTOR.  Best way to fix it would be to define
   CALL_DUMMY_BREAKPOINT_OFFSET.  */
#if !GDB_MULTI_ARCH
#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 | (BPT_VECTOR << 16))}
#define CALL_DUMMY_LENGTH 28	/* Size of CALL_DUMMY */
#define CALL_DUMMY_START_OFFSET 12	/* Offset to jsr instruction */
#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 12)

/* Insert the specified number of args and function address
   into a call sequence of the above form stored at DUMMYNAME.
   We use the BFD routines to store a big-endian value of known size.  */

#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)     \
{ bfd_putb32 (fun,     (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 2);  \
  bfd_putb32 (nargs*4, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 8); }

/* Push an empty stack frame, to record the current PC, etc.  */

#define PUSH_DUMMY_FRAME	{ m68k_push_dummy_frame (); }

extern void m68k_push_dummy_frame (void);

extern void m68k_pop_frame (void);

/* Discard from the stack the innermost frame, restoring all registers.  */

#define POP_FRAME		{ m68k_pop_frame (); }


/* Figure out where the longjmp will land.  Slurp the args out of the stack.
   We expect the first arg to be a pointer to the jmp_buf structure from which
   we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
   This routine returns true on success */

extern int m68k_get_longjmp_target (CORE_ADDR *);
#endif
Commit	Line	Data
c906108c	1	/* Parameters for execution on a 68000 series machine.
b6ba6518 KB	2	Copyright 1986, 1987, 1989, 1990, 1992, 1993, 1994, 1995, 1996, 1998,
b6ba6518 KB	3	1999, 2000 Free Software Foundation, Inc.
c906108c	4
c5aa993b	5	This file is part of GDB.
c906108c	6
c5aa993b JM	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
c906108c	11
c5aa993b JM	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
c906108c	16
c5aa993b JM	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
c906108c	21
f88e2c52 AC	22	#include "regcache.h"
f88e2c52 AC	23
103a1597	24	#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
152d9db6	25
c906108c SS	26	/* Generic 68000 stuff, to be included by other tm-.h files. /
c906108c SS	27
103a1597 GS	28	/* struct frame_info; */
	29
	30	/* D0_REGNM and A0_REGNUM must be defined here because they are
	31	used by the monitor. */
	32
	33	#define D0_REGNUM 0
	34	#define A0_REGNUM 8
6300c360 GS	35
	36	/* Sequence of bytes for breakpoint instruction.
	37	This is a TRAP instruction. The last 4 bits (0xf below) is the
	38	vector. Systems which don't use 0xf should define BPT_VECTOR
	39	themselves before including this file. */
	40
103a1597	41	#if !GDB_MULTI_ARCH
6300c360 GS	42	#if !defined (BPT_VECTOR)
	43	#define BPT_VECTOR 0xf
	44	#endif
	45
	46	#if !defined (BREAKPOINT)
	47	#define BREAKPOINT {0x4e, (0x40 \| BPT_VECTOR)}
	48	#endif
	49
	50	/* We default to vector 1 for the "remote" target, but allow targets
	51	to override. */
	52	#if !defined (REMOTE_BPT_VECTOR)
	53	#define REMOTE_BPT_VECTOR 1
	54	#endif
103a1597	55	#endif
6300c360	56
103a1597	57	#if !GDB_MULTI_ARCH
6300c360 GS	58	#if !defined (REMOTE_BREAKPOINT)
	59	#define REMOTE_BREAKPOINT {0x4e, (0x40 \| REMOTE_BPT_VECTOR)}
	60	#endif
103a1597	61	#endif
6300c360	62
103a1597	63	#if !GDB_MULTI_ARCH
6300c360 GS	64	#define REGISTER_BYTES_FP (164 + 8 + 812 + 3*4)
	65	#define REGISTER_BYTES_NOFP (16*4 + 8)
	66
	67
	68	#define NUM_FREGS (NUM_REGS-24)
	69
103a1597	70
6300c360 GS	71	/* This was determined by experimentation on hp300 BSD 4.3. Perhaps
	72	it corresponds to some offset in /usr/include/sys/user.h or
	73	something like that. Using some system include file would
	74	have the advantage of probably being more robust in the face
	75	of OS upgrades, but the disadvantage of being wrong for
	76	cross-debugging. */
	77
	78	#define SIG_PC_FP_OFFSET 530
	79
	80	/* Offset from SP to first arg on stack at first instruction of a function */
	81
	82	#define SP_ARG0 (1 * 4)
	83
	84	#define TARGET_M68K
103a1597	85	#endif
6300c360	86
5d3ed2e3	87	#if !GDB_MULTI_ARCH
16f769f3 AC	88	#define TARGET_LONG_DOUBLE_FORMAT &floatformat_m68881_ext
	89
	90	#define TARGET_LONG_DOUBLE_BIT 96
	91
c906108c SS	92	/* Offset from address of function to start of its code.
	93	Zero on most machines. */
	94
	95	#define FUNCTION_START_OFFSET 0
	96
	97	/* Advance PC across any function entry prologue instructions
	98	to reach some "real" code. */
	99
	100	#if !defined(SKIP_PROLOGUE)
b83266a0	101	#define SKIP_PROLOGUE(ip) (m68k_skip_prologue (ip))
c906108c	102	#endif
5d3ed2e3	103	#endif
a14ed312	104	extern CORE_ADDR m68k_skip_prologue (CORE_ADDR ip);
c906108c	105
5d3ed2e3	106
c906108c SS	107	/* Immediately after a function call, return the saved pc.
	108	Can't always go through the frames for this because on some machines
	109	the new frame is not set up until the new function executes
	110	some instructions. */
	111
5d3ed2e3	112	#if !GDB_MULTI_ARCH
a14ed312	113	extern CORE_ADDR m68k_saved_pc_after_call (struct frame_info *);
c906108c SS	114
	115	#define SAVED_PC_AFTER_CALL(frame) \
	116	m68k_saved_pc_after_call(frame)
5d3ed2e3	117	#endif
c906108c SS	118
	119	/* Stack grows downward. */
	120
5d3ed2e3	121	#if !GDB_MULTI_ARCH
c906108c SS	122	#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
	123
	124	/* Stack must be kept short aligned when doing function calls. */
	125
	126	#define STACK_ALIGN(ADDR) (((ADDR) + 1) & ~1)
5d3ed2e3	127	#endif
c906108c	128
c906108c SS	129	/* If your kernel resets the pc after the trap happens you may need to
	130	define this before including this file. */
	131
942dc0e9	132	#if !GDB_MULTI_ARCH
c906108c SS	133	#if !defined (DECR_PC_AFTER_BREAK)
	134	#define DECR_PC_AFTER_BREAK 2
	135	#endif
942dc0e9	136	#endif
c906108c	137
6300c360 GS	138	#if !GDB_MULTI_ARCH
	139	#ifndef NUM_REGS
	140	#define NUM_REGS 29
	141	#endif
	142	#endif
	143
c906108c SS	144	/* Say how long (ordinary) registers are. This is a piece of bogosity
	145	used in push_word and a few other places; REGISTER_RAW_SIZE is the
	146	real way to know how big a register is. */
	147
5d3ed2e3	148	#if !GDB_MULTI_ARCH
c906108c	149	#define REGISTER_SIZE 4
5d3ed2e3	150	#endif
c906108c	151
942dc0e9	152	#if !GDB_MULTI_ARCH
c906108c SS	153	#ifndef REGISTER_BYTES_OK
	154	#define REGISTER_BYTES_OK(b) \
	155	((b) == REGISTER_BYTES_FP \
	156	\|\| (b) == REGISTER_BYTES_NOFP)
	157	#endif
	158
	159	#ifndef REGISTER_BYTES
	160	#define REGISTER_BYTES (164 + 8 + 812 + 3*4)
	161	#endif
103a1597	162	#endif /* multi-arch */
c906108c SS	163
	164	/* Index within `registers' of the first byte of the space for
	165	register N. */
	166
5d3ed2e3	167	#if !GDB_MULTI_ARCH
c906108c SS	168	#define REGISTER_BYTE(N) \
	169	((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168 \
	170	: (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72 \
	171	: (N) * 4)
5d3ed2e3	172	#endif
c906108c SS	173
	174	/* Number of bytes of storage in the actual machine representation
	175	for register N. On the 68000, all regs are 4 bytes
	176	except the floating point regs which are 12 bytes. */
	177	/* Note that the unsigned cast here forces the result of the
	178	subtraction to very high positive values if N < FP0_REGNUM */
5d3ed2e3	179	#if !GDB_MULTI_ARCH
c906108c SS	180	#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)
	181
	182	/* Number of bytes of storage in the program's representation
	183	for register N. On the 68000, all regs are 4 bytes
16f769f3	184	except the floating point regs which are 12-byte long doubles. */
c906108c	185
16f769f3	186	#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)
c906108c SS	187
	188	/* Largest value REGISTER_RAW_SIZE can have. */
	189
	190	#define MAX_REGISTER_RAW_SIZE 12
	191
	192	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
	193
16f769f3	194	#define MAX_REGISTER_VIRTUAL_SIZE 12
103a1597	195	#endif /* multi-arch */
942dc0e9	196
c906108c	197	/* Return the GDB type object for the "standard" data type of data
16f769f3	198	in register N. This should be int for D0-D7, long double for FP0-FP7,
c906108c SS	199	and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc).
	200	Note, for registers which contain addresses return pointer to void,
	201	not pointer to char, because we don't want to attempt to print
	202	the string after printing the address. */
5d3ed2e3	203	#if !GDB_MULTI_ARCH
c906108c SS	204	#define REGISTER_VIRTUAL_TYPE(N) \
c906108c SS	205	((unsigned) (N) >= FPC_REGNUM ? lookup_pointer_type (builtin_type_void) : \
16f769f3	206	(unsigned) (N) >= FP0_REGNUM ? builtin_type_long_double : \
c906108c SS	207	(unsigned) (N) >= A0_REGNUM ? lookup_pointer_type (builtin_type_void) : \
c906108c SS	208	builtin_type_int)
5d3ed2e3	209	#endif
c906108c SS	210	/* Initializer for an array of names of registers.
	211	Entries beyond the first NUM_REGS are ignored. */
	212
5d3ed2e3	213	#if !GDB_MULTI_ARCH
c906108c SS	214	#define REGISTER_NAMES \
	215	{"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
	216	"a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \
	217	"ps", "pc", \
	218	"fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
	219	"fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
5d3ed2e3	220	#endif
c906108c SS	221
	222	/* Register numbers of various important registers.
	223	Note that some of these values are "real" register numbers,
	224	and correspond to the general registers of the machine,
	225	and some are "phony" register numbers which are too large
	226	to be actual register numbers as far as the user is concerned
	227	but do serve to get the desired values when passed to read_register. */
	228
103a1597	229	#if !GDB_MULTI_ARCH
6300c360	230
c906108c SS	231	#define A1_REGNUM 9
	232	#define FP_REGNUM 14 /* Contains address of executing stack frame */
	233	#define SP_REGNUM 15 /* Contains address of top of stack */
	234	#define PS_REGNUM 16 /* Contains processor status */
	235	#define PC_REGNUM 17 /* Contains program counter */
	236	#define FP0_REGNUM 18 /* Floating point register 0 */
	237	#define FPC_REGNUM 26 /* 68881 control register */
	238	#define FPS_REGNUM 27 /* 68881 status register */
	239	#define FPI_REGNUM 28 /* 68881 iaddr register */
103a1597	240	#endif
5d3ed2e3	241
c906108c SS	242	/* Store the address of the place in which to copy the structure the
c906108c SS	243	subroutine will return. This is called from call_function. */
942dc0e9	244	#if !GDB_MULTI_ARCH
c906108c SS	245	#define STORE_STRUCT_RETURN(ADDR, SP) \
	246	{ write_register (A1_REGNUM, (ADDR)); }
	247
	248	/* Extract from an array REGBUF containing the (raw) register state
	249	a function return value of type TYPE, and copy that, in virtual format,
	250	into VALBUF. This is assuming that floating point values are returned
	251	as doubles in d0/d1. */
	252
26e9b323 AC	253	#if !defined (DEPRECATED_EXTRACT_RETURN_VALUE)
26e9b323 AC	254	#define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
c906108c SS	255	memcpy ((VALBUF), \
	256	(char *)(REGBUF) + \
	257	(TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)), \
	258	TYPE_LENGTH(TYPE))
	259	#endif
103a1597	260	#endif /* multi-arch */
c906108c SS	261
	262	/* Write into appropriate registers a function return value
	263	of type TYPE, given in virtual format. Assumes floats are passed
	264	in d0/d1. */
	265
942dc0e9	266	#if !GDB_MULTI_ARCH
c906108c SS	267	#if !defined (STORE_RETURN_VALUE)
	268	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
	269	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
	270	#endif
	271
	272	/* Extract from an array REGBUF containing the (raw) register state
	273	the address in which a function should return its structure value,
	274	as a CORE_ADDR (or an expression that can be used as one). */
	275
26e9b323	276	#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((CORE_ADDR )(REGBUF))
103a1597	277	#endif /* multi-arch */
c906108c SS	278	\f
	279	/* Describe the pointer in each stack frame to the previous stack frame
	280	(its caller). */
	281
	282	/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
	283	chain-pointer.
	284	In the case of the 68000, the frame's nominal address
	285	is the address of a 4-byte word containing the calling frame's address. */
	286
	287	/* If we are chaining from sigtramp, then manufacture a sigtramp frame
	288	(which isn't really on the stack. I'm not sure this is right for anything
	289	but BSD4.3 on an hp300. */
942dc0e9	290	#if !GDB_MULTI_ARCH
c906108c SS	291	#define FRAME_CHAIN(thisframe) \
	292	(thisframe->signal_handler_caller \
	293	? thisframe->frame \
	294	: (!inside_entry_file ((thisframe)->pc) \
	295	? read_memory_integer ((thisframe)->frame, 4) \
	296	: 0))
942dc0e9	297	#endif
c906108c SS	298
	299	/* Define other aspects of the stack frame. */
	300
	301	/* A macro that tells us whether the function invocation represented
	302	by FI does not have a frame on the stack associated with it. If it
	303	does not, FRAMELESS is set to 1, else 0. */
942dc0e9	304	#if !GDB_MULTI_ARCH
392a587b JM	305	#define FRAMELESS_FUNCTION_INVOCATION(FI) \
392a587b JM	306	(((FI)->signal_handler_caller) ? 0 : frameless_look_for_prologue(FI))
942dc0e9	307	#endif
c906108c	308
c906108c	309
c906108c	310
942dc0e9	311	#if !GDB_MULTI_ARCH
c906108c SS	312	#define FRAME_SAVED_PC(FRAME) \
	313	(((FRAME)->signal_handler_caller \
	314	? ((FRAME)->next \
	315	? read_memory_integer ((FRAME)->next->frame + SIG_PC_FP_OFFSET, 4) \
	316	: read_memory_integer (read_register (SP_REGNUM) \
	317	+ SIG_PC_FP_OFFSET - 8, 4) \
	318	) \
	319	: read_memory_integer ((FRAME)->frame + 4, 4)) \
	320	)
942dc0e9	321	#endif
c906108c	322
6300c360	323	#if !GDB_MULTI_ARCH
c906108c SS	324	#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
	325
	326	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
6300c360	327	#endif
c906108c SS	328
	329	/* Set VAL to the number of args passed to frame described by FI.
	330	Can set VAL to -1, meaning no way to tell. */
	331
	332	/* We can't tell how many args there are
	333	now that the C compiler delays popping them. */
6300c360	334	#if !GDB_MULTI_ARCH
c906108c	335	#if !defined (FRAME_NUM_ARGS)
392a587b	336	#define FRAME_NUM_ARGS(fi) (-1)
c906108c SS	337	#endif
c906108c SS	338
6300c360	339
c906108c SS	340	/* Return number of bytes at start of arglist that are not really args. */
	341
	342	#define FRAME_ARGS_SKIP 8
6300c360	343	#endif
78f6d055 AC	344
	345	/* Put here the code to store, into a struct frame_saved_regs,
	346	the addresses of the saved registers of frame described by FRAME_INFO.
	347	This includes special registers such as pc and fp saved in special
	348	ways in the stack frame. sp is even more special:
	349	the address we return for it IS the sp for the next frame. */
	350
	351	#if !GDB_MULTI_ARCH
	352	#if !defined (FRAME_INIT_SAVED_REGS)
	353	#define FRAME_INIT_SAVED_REGS(fi) m68k_frame_init_saved_regs ((fi))
	354	void m68k_frame_init_saved_regs (struct frame_info *frame_info);
	355	#endif /* no FRAME_INIT_SAVED_REGS. */
	356	#endif
c906108c	357	\f
c5aa993b	358
c906108c SS	359	/* Things needed for making the inferior call functions. */
	360
	361	/* The CALL_DUMMY macro is the sequence of instructions, as disassembled
	362	by gdb itself:
	363
	364	These instructions exist only so that m68k_find_saved_regs can parse
	365	them as a "prologue"; they are never executed.
	366
c5aa993b JM	367	fmovemx fp0-fp7,sp@- 0xf227 0xe0ff
	368	moveml d0-a5,sp@- 0x48e7 0xfffc
	369	clrw sp@- 0x4267
	370	movew ccr,sp@- 0x42e7
c906108c SS	371
	372	The arguments are pushed at this point by GDB; no code is needed in
	373	the dummy for this. The CALL_DUMMY_START_OFFSET gives the position
	374	of the following jsr instruction. That is where we start
	375	executing.
	376
c5aa993b JM	377	jsr @#0x32323232 0x4eb9 0x3232 0x3232
	378	addal #0x69696969,sp 0xdffc 0x6969 0x6969
	379	trap #<your BPT_VECTOR number here> 0x4e4?
	380	nop 0x4e71
c906108c SS	381
	382	Note this is CALL_DUMMY_LENGTH bytes (28 for the above example).
	383
	384	The dummy frame always saves the floating-point registers, whether they
	385	actually exist on this target or not. */
	386
	387	/* FIXME: Wrong to hardwire this as BPT_VECTOR when sometimes it
	388	should be REMOTE_BPT_VECTOR. Best way to fix it would be to define
	389	CALL_DUMMY_BREAKPOINT_OFFSET. */
78f6d055	390	#if !GDB_MULTI_ARCH
c906108c	391	#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 \| (BPT_VECTOR << 16))}
c5aa993b JM	392	#define CALL_DUMMY_LENGTH 28 /* Size of CALL_DUMMY */
c5aa993b JM	393	#define CALL_DUMMY_START_OFFSET 12 /* Offset to jsr instruction */
c906108c SS	394	#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 12)
	395
	396	/* Insert the specified number of args and function address
	397	into a call sequence of the above form stored at DUMMYNAME.
	398	We use the BFD routines to store a big-endian value of known size. */
	399
	400	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
	401	{ bfd_putb32 (fun, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 2); \
	402	bfd_putb32 (nargs4, (unsigned char ) dummyname + CALL_DUMMY_START_OFFSET + 8); }
	403
	404	/* Push an empty stack frame, to record the current PC, etc. */
	405
	406	#define PUSH_DUMMY_FRAME { m68k_push_dummy_frame (); }
	407
a14ed312	408	extern void m68k_push_dummy_frame (void);
c906108c	409
a14ed312	410	extern void m68k_pop_frame (void);
c906108c SS	411
	412	/* Discard from the stack the innermost frame, restoring all registers. */
	413
	414	#define POP_FRAME { m68k_pop_frame (); }
c906108c	415
f4281f55 AC	416
	417	/* Figure out where the longjmp will land. Slurp the args out of the stack.
	418	We expect the first arg to be a pointer to the jmp_buf structure from which
	419	we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
	420	This routine returns true on success */
	421
	422	extern int m68k_get_longjmp_target (CORE_ADDR *);
6300c360	423	#endif