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

/* Definitions to target GDB to a merlin under utek 2.1
   Copyright (C) 1986, 1987, 1989 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.  */

#define TARGET_BYTE_ORDER LITTLE_ENDIAN

/* I don't know if this will work for cross-debugging, even if you do get
   a copy of the right include file.  */
#include <machine/reg.h>

/* Define this if the C compiler puts an underscore at the front
   of external names before giving them to the linker.  */

#define NAMES_HAVE_UNDERSCORE

/* Debugger information will be in DBX format.  */

#define READ_DBX_FORMAT

/* 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.  */

#define SKIP_PROLOGUE(pc)   				\
{ register int op = read_memory_integer (pc, 1);	\
  if (op == 0x82)					\
    { op = read_memory_integer (pc+2,1);		\
      if ((op & 0x80) == 0) pc += 3;			\
      else if ((op & 0xc0) == 0x80) pc += 4;		\
      else pc += 6;					\
    }}

/* 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.  */

#define SAVED_PC_AFTER_CALL(frame) \
	read_memory_integer (read_register (SP_REGNUM), 4)

/* Address of end of stack space.  */

#define STACK_END_ADDR (0x800000)

/* Stack grows downward.  */

#define INNER_THAN <

/* Sequence of bytes for breakpoint instruction.  */

#define BREAKPOINT {0xf2}

/* Amount PC must be decremented by after a breakpoint.
   This is often the number of bytes in BREAKPOINT
   but not always.  */

#define DECR_PC_AFTER_BREAK 0

/* Nonzero if instruction at PC is a return instruction.  */

#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)

/* Return 1 if P points to an invalid floating point value.  */

#define INVALID_FLOAT(p, len) 0

/* Define this to say that the "svc" insn is followed by
   codes in memory saying which kind of system call it is.  */

#define NS32K_SVC_IMMED_OPERANDS

/* Say how long (ordinary) registers are.  */

#define REGISTER_TYPE long

/* Number of machine registers */

#define NUM_REGS		25

#define NUM_GENERAL_REGS	8

/* Initializer for an array of names of registers.
   There should be NUM_REGS strings in this initializer.  */

#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",	\
			"pc", "sp", "fp", "ps",				\
 			"fsr",						\
 			"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",	\
			"l0", "l1", "l2", "l3", "l4",			\
 			}

/* 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.  */

#define AP_REGNUM FP_REGNUM
#define FP_REGNUM 10		/* Contains address of executing stack frame */
#define SP_REGNUM 9		/* Contains address of top of stack */
#define PC_REGNUM 8		/* Contains program counter */
#define PS_REGNUM 11		/* Contains processor status */
#define FPS_REGNUM 12		/* Floating point status register */
#define FP0_REGNUM 13		/* Floating point register 0 */
#define LP0_REGNUM 21		/* Double register 0 (same as FP0) */

/* Total amount of space needed to store our copies of the machine's
   register state, the array `registers'.  */
#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))

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

#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
	LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)

/* Number of bytes of storage in the actual machine representation
   for register N.  On the 32000, all regs are 4 bytes
   except for the doubled floating registers. */

#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)

/* Number of bytes of storage in the program's representation
   for register N.  On the 32000, all regs are 4 bytes
   except for the doubled floating registers. */

#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)

/* Largest value REGISTER_RAW_SIZE can have.  */

#define MAX_REGISTER_RAW_SIZE 8

/* Largest value REGISTER_VIRTUAL_SIZE can have.  */

#define MAX_REGISTER_VIRTUAL_SIZE 8

/* Nonzero if register N requires conversion
   from raw format to virtual format.  */

#define REGISTER_CONVERTIBLE(N) 0

/* Convert data from raw format for register REGNUM
   to virtual format for register REGNUM.  */

#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)	\
  bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));

/* Convert data from virtual format for register REGNUM
   to raw format for register REGNUM.  */

#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)	\
  bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));

/* Return the GDB type object for the "standard" data type
   of data in register N.  */

#define REGISTER_VIRTUAL_TYPE(N) \
  ((N) >= FP0_REGNUM ?		\
    ((N) >= LP0_REGNUM ?	\
     builtin_type_double	\
     : builtin_type_float)	\
   : builtin_type_int)	

/* Store the address of the place in which to copy the structure the
   subroutine will return.  This is called from call_function.

   On this machine this is a no-op, as gcc doesn't run on it yet.
   This calling convention is not used. */

#define STORE_STRUCT_RETURN(ADDR, SP)

/* 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.  */

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE))

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

#define STORE_RETURN_VALUE(TYPE,VALBUF) \
  write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))

/* 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 EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
\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.

   FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
   and produces the nominal address of the caller frame.

   However, if FRAME_CHAIN_VALID returns zero,
   it means the given frame is the outermost one and has no caller.
   In that case, FRAME_CHAIN_COMBINE is not used.  */

/* In the case of the Merlin, the frame's nominal address is the FP value,
   and at that address is saved previous FP value as a 4-byte word.  */

#define FRAME_CHAIN(thisframe)  \
  (outside_startup_file ((thisframe)->pc) ? \
   read_memory_integer ((thisframe)->frame, 4) :\
   0)

#define FRAME_CHAIN_VALID(chain, thisframe) \
  (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))

#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)

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

#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))

/* compute base of arguments */
#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)

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

/* Return number of args passed to a frame.
   Can return -1, meaning no way to tell.  */

#define FRAME_NUM_ARGS(numargs, fi)			\
{ CORE_ADDR pc;						\
  int insn;						\
  int addr_mode;					\
  int width;						\
							\
  pc = FRAME_SAVED_PC (fi);				\
  insn = read_memory_integer (pc,2);			\
  addr_mode = (insn >> 11) & 0x1f;			\
  insn = insn & 0x7ff;					\
  if ((insn & 0x7fc) == 0x57c				\
      && addr_mode == 0x14) /* immediate */		\
    { if (insn == 0x57c) /* adjspb */			\
	width = 1;					\
      else if (insn == 0x57d) /* adjspw */		\
	width = 2;					\
      else if (insn == 0x57f) /* adjspd */		\
	width = 4;					\
      numargs = read_memory_integer (pc+2,width);	\
      if (width > 1)					\
	flip_bytes (&numargs, width);			\
      numargs = - sign_extend (numargs, width*8) / 4; }	\
  else numargs = -1;					\
}

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

#define FRAME_ARGS_SKIP 8

/* 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.  */

#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
{ int regmask,regnum;						\
  int localcount;						\
  CORE_ADDR enter_addr;						\
  CORE_ADDR next_addr;						\
								\
  enter_addr = get_pc_function_start ((frame_info)->pc);	\
  regmask = read_memory_integer (enter_addr+1, 1);		\
  localcount = ns32k_localcount (enter_addr);			\
  next_addr = (frame_info)->frame + localcount;			\
  for (regnum = 0; regnum < 8; regnum++, regmask >>= 1)		\
    (frame_saved_regs).regs[regnum]				\
      = (regmask & 1) ? (next_addr -= 4) : 0;			\
  (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4;	\
  (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4;	\
  (frame_saved_regs).regs[FP_REGNUM]				\
     = read_memory_integer ((frame_info)->frame, 4); }

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

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

#define PUSH_DUMMY_FRAME \
{ register CORE_ADDR sp = read_register (SP_REGNUM);	\
  register int regnum;					\
  sp = push_word (sp, read_register (PC_REGNUM));	\
  sp = push_word (sp, read_register (FP_REGNUM));	\
  write_register (FP_REGNUM, sp);			\
  for (regnum = 0; regnum < 8; regnum++)  		\
    sp = push_word (sp, read_register (regnum));	\
  write_register (SP_REGNUM, sp);  			\
}

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

#define POP_FRAME  \
{ register FRAME frame = get_current_frame ();			 \
  register CORE_ADDR fp;					 \
  register int regnum;						 \
  struct frame_saved_regs fsr;					 \
  struct frame_info *fi;						 \
  fi = get_frame_info (frame);					 \
  fp = fi->frame;						 \
  get_frame_saved_regs (fi, &fsr);				 \
  for (regnum = 0; regnum < 8; regnum++)			 \
    if (fsr.regs[regnum])					 \
      write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
  write_register (FP_REGNUM, read_memory_integer (fp, 4));	 \
  write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));   \
  write_register (SP_REGNUM, fp + 8);				 \
  flush_cached_frames ();					 \
  set_current_frame (create_new_frame (read_register (FP_REGNUM),\
				       read_pc ()));		 \
}

/* This sequence of words is the instructions
     enter	0xff,0		82 ff 00
     jsr	@0x00010203	7f ae c0 01 02 03
     adjspd	0x69696969	7f a5 01 02 03 04
     bpt			f2
   Note this is 16 bytes.  */

#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }

#define CALL_DUMMY_START_OFFSET	3
#define CALL_DUMMY_LENGTH	16
#define CALL_DUMMY_ADDR		5
#define CALL_DUMMY_NARGS	11

/* Insert the specified number of args and function address
   into a call sequence of the above form stored at DUMMYNAME.  */

#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)   		\
{ int flipped = fun | 0xc0000000;				\
  flip_bytes (&flipped, 4);					\
  *((int *) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped;	\
  flipped = - nargs * 4;					\
  flip_bytes (&flipped, 4);					\
  *((int *) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped;	\
}
Commit	Line	Data
dd3b648e RP	1	/* Definitions to target GDB to a merlin under utek 2.1
	2	Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
	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	#define TARGET_BYTE_ORDER LITTLE_ENDIAN
	21
	22	/* I don't know if this will work for cross-debugging, even if you do get
	23	a copy of the right include file. */
	24	#include <machine/reg.h>
	25
	26	/* Define this if the C compiler puts an underscore at the front
	27	of external names before giving them to the linker. */
	28
	29	#define NAMES_HAVE_UNDERSCORE
	30
	31	/* Debugger information will be in DBX format. */
	32
	33	#define READ_DBX_FORMAT
	34
	35	/* Offset from address of function to start of its code.
	36	Zero on most machines. */
	37
	38	#define FUNCTION_START_OFFSET 0
	39
	40	/* Advance PC across any function entry prologue instructions
	41	to reach some "real" code. */
	42
	43	#define SKIP_PROLOGUE(pc) \
	44	{ register int op = read_memory_integer (pc, 1); \
	45	if (op == 0x82) \
	46	{ op = read_memory_integer (pc+2,1); \
	47	if ((op & 0x80) == 0) pc += 3; \
	48	else if ((op & 0xc0) == 0x80) pc += 4; \
	49	else pc += 6; \
	50	}}
	51
	52	/* Immediately after a function call, return the saved pc.
	53	Can't always go through the frames for this because on some machines
	54	the new frame is not set up until the new function executes
	55	some instructions. */
	56
	57	#define SAVED_PC_AFTER_CALL(frame) \
	58	read_memory_integer (read_register (SP_REGNUM), 4)
	59
	60	/* Address of end of stack space. */
	61
	62	#define STACK_END_ADDR (0x800000)
	63
	64	/* Stack grows downward. */
	65
	66	#define INNER_THAN <
	67
	68	/* Sequence of bytes for breakpoint instruction. */
	69
	70	#define BREAKPOINT {0xf2}
	71
	72	/* Amount PC must be decremented by after a breakpoint.
	73	This is often the number of bytes in BREAKPOINT
	74	but not always. */
	75
	76	#define DECR_PC_AFTER_BREAK 0
	77
	78	/* Nonzero if instruction at PC is a return instruction. */
	79
	80	#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
	81
	82	/* Return 1 if P points to an invalid floating point value. */
83
84	#define INVALID_FLOAT(p, len) 0
85
86	/* Define this to say that the "svc" insn is followed by
87	codes in memory saying which kind of system call it is. */
88
89	#define NS32K_SVC_IMMED_OPERANDS
90
91	/* Say how long (ordinary) registers are. */
92
93	#define REGISTER_TYPE long
94
95	/* Number of machine registers */
96
97	#define NUM_REGS 25
98
99	#define NUM_GENERAL_REGS 8
100
101	/* Initializer for an array of names of registers.
102	There should be NUM_REGS strings in this initializer. */
103
104	#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
105	"pc", "sp", "fp", "ps", \
106	"fsr", \
107	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
108	"l0", "l1", "l2", "l3", "l4", \
109	}
110
111	/* Register numbers of various important registers.
112	Note that some of these values are "real" register numbers,
113	and correspond to the general registers of the machine,
114	and some are "phony" register numbers which are too large
115	to be actual register numbers as far as the user is concerned
116	but do serve to get the desired values when passed to read_register. */
117
118	#define AP_REGNUM FP_REGNUM
119	#define FP_REGNUM 10 /* Contains address of executing stack frame */
120	#define SP_REGNUM 9 /* Contains address of top of stack */
121	#define PC_REGNUM 8 /* Contains program counter */
122	#define PS_REGNUM 11 /* Contains processor status */
123	#define FPS_REGNUM 12 /* Floating point status register */
124	#define FP0_REGNUM 13 /* Floating point register 0 */
125	#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
126
127	/* Total amount of space needed to store our copies of the machine's
128	register state, the array `registers'. */
129	#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
130
131	/* Index within `registers' of the first byte of the space for
132	register N. */
133
134	#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
135	LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
136
137	/* Number of bytes of storage in the actual machine representation
138	for register N. On the 32000, all regs are 4 bytes
139	except for the doubled floating registers. */
140
141	#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
142
143	/* Number of bytes of storage in the program's representation
144	for register N. On the 32000, all regs are 4 bytes
145	except for the doubled floating registers. */
146
147	#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
148
149	/* Largest value REGISTER_RAW_SIZE can have. */
150
151	#define MAX_REGISTER_RAW_SIZE 8
152
153	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
154
155	#define MAX_REGISTER_VIRTUAL_SIZE 8
156
157	/* Nonzero if register N requires conversion
158	from raw format to virtual format. */
159
160	#define REGISTER_CONVERTIBLE(N) 0
161
162	/* Convert data from raw format for register REGNUM
163	to virtual format for register REGNUM. */
164
165	#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
166	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
167
168	/* Convert data from virtual format for register REGNUM
169	to raw format for register REGNUM. */
170
171	#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
172	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
173
174	/* Return the GDB type object for the "standard" data type
175	of data in register N. */
176
177	#define REGISTER_VIRTUAL_TYPE(N) \
178	((N) >= FP0_REGNUM ? \
179	((N) >= LP0_REGNUM ? \
180	builtin_type_double \
181	: builtin_type_float) \
182	: builtin_type_int)
183
184	/* Store the address of the place in which to copy the structure the
185	subroutine will return. This is called from call_function.
186
187	On this machine this is a no-op, as gcc doesn't run on it yet.
188	This calling convention is not used. */
189
190	#define STORE_STRUCT_RETURN(ADDR, SP)
191
192	/* Extract from an array REGBUF containing the (raw) register state
193	a function return value of type TYPE, and copy that, in virtual format,
194	into VALBUF. */
195
196	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
197	bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE))
198
199	/* Write into appropriate registers a function return value
200	of type TYPE, given in virtual format. */
201
202	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
203	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
204
205	/* Extract from an array REGBUF containing the (raw) register state
206	the address in which a function should return its structure value,
207	as a CORE_ADDR (or an expression that can be used as one). */
208
209	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
210	\f
211	/* Describe the pointer in each stack frame to the previous stack frame
212	(its caller). */
213
214	/* FRAME_CHAIN takes a frame's nominal address
215	and produces the frame's chain-pointer.
216
217	FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
218	and produces the nominal address of the caller frame.
219
220	However, if FRAME_CHAIN_VALID returns zero,
221	it means the given frame is the outermost one and has no caller.
222	In that case, FRAME_CHAIN_COMBINE is not used. */
223
224	/* In the case of the Merlin, the frame's nominal address is the FP value,
225	and at that address is saved previous FP value as a 4-byte word. */
226
227	#define FRAME_CHAIN(thisframe) \
228	(outside_startup_file ((thisframe)->pc) ? \
229	read_memory_integer ((thisframe)->frame, 4) :\
230	0)
231
232	#define FRAME_CHAIN_VALID(chain, thisframe) \
233	(chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))
234
235	#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
236
237	/* Define other aspects of the stack frame. */
238
239	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
240
241	/* compute base of arguments */
242	#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
243
244	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
245
246	/* Return number of args passed to a frame.
247	Can return -1, meaning no way to tell. */
248
249	#define FRAME_NUM_ARGS(numargs, fi) \
250	{ CORE_ADDR pc; \
251	int insn; \
252	int addr_mode; \
253	int width; \
254	\
255	pc = FRAME_SAVED_PC (fi); \
256	insn = read_memory_integer (pc,2); \
257	addr_mode = (insn >> 11) & 0x1f; \
258	insn = insn & 0x7ff; \
259	if ((insn & 0x7fc) == 0x57c \
260	&& addr_mode == 0x14) /* immediate */ \
261	{ if (insn == 0x57c) /* adjspb */ \
262	width = 1; \
263	else if (insn == 0x57d) /* adjspw */ \
264	width = 2; \
265	else if (insn == 0x57f) /* adjspd */ \
266	width = 4; \
267	numargs = read_memory_integer (pc+2,width); \
268	if (width > 1) \
269	flip_bytes (&numargs, width); \
270	numargs = - sign_extend (numargs, width*8) / 4; } \
271	else numargs = -1; \
272	}
273
274	/* Return number of bytes at start of arglist that are not really args. */
275
276	#define FRAME_ARGS_SKIP 8
277
278	/* Put here the code to store, into a struct frame_saved_regs,
279	the addresses of the saved registers of frame described by FRAME_INFO.
280	This includes special registers such as pc and fp saved in special
281	ways in the stack frame. sp is even more special:
282	the address we return for it IS the sp for the next frame. */
283
284	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
285	{ int regmask,regnum; \
286	int localcount; \
287	CORE_ADDR enter_addr; \
288	CORE_ADDR next_addr; \
289	\
290	enter_addr = get_pc_function_start ((frame_info)->pc); \
291	regmask = read_memory_integer (enter_addr+1, 1); \
292	localcount = ns32k_localcount (enter_addr); \
293	next_addr = (frame_info)->frame + localcount; \
294	for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
295	(frame_saved_regs).regs[regnum] \
296	= (regmask & 1) ? (next_addr -= 4) : 0; \
297	(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \
298	(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
299	(frame_saved_regs).regs[FP_REGNUM] \
300	= read_memory_integer ((frame_info)->frame, 4); }
301
302	\f
303	/* Things needed for making the inferior call functions. */
304
305	/* Push an empty stack frame, to record the current PC, etc. */
306
307	#define PUSH_DUMMY_FRAME \
308	{ register CORE_ADDR sp = read_register (SP_REGNUM); \
309	register int regnum; \
310	sp = push_word (sp, read_register (PC_REGNUM)); \
311	sp = push_word (sp, read_register (FP_REGNUM)); \
312	write_register (FP_REGNUM, sp); \
313	for (regnum = 0; regnum < 8; regnum++) \
314	sp = push_word (sp, read_register (regnum)); \
315	write_register (SP_REGNUM, sp); \
316	}
317
318	/* Discard from the stack the innermost frame, restoring all registers. */
319
320	#define POP_FRAME \
321	{ register FRAME frame = get_current_frame (); \
322	register CORE_ADDR fp; \
323	register int regnum; \
324	struct frame_saved_regs fsr; \
325	struct frame_info *fi; \
326	fi = get_frame_info (frame); \
327	fp = fi->frame; \
328	get_frame_saved_regs (fi, &fsr); \
329	for (regnum = 0; regnum < 8; regnum++) \
330	if (fsr.regs[regnum]) \
331	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
332	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
333	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
334	write_register (SP_REGNUM, fp + 8); \
335	flush_cached_frames (); \
336	set_current_frame (create_new_frame (read_register (FP_REGNUM),\
337	read_pc ())); \
338	}
339
340	/* This sequence of words is the instructions
341	enter 0xff,0 82 ff 00
342	jsr @0x00010203 7f ae c0 01 02 03
343	adjspd 0x69696969 7f a5 01 02 03 04
344	bpt f2
345	Note this is 16 bytes. */
346
347	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
348
349	#define CALL_DUMMY_START_OFFSET 3
350	#define CALL_DUMMY_LENGTH 16
351	#define CALL_DUMMY_ADDR 5
352	#define CALL_DUMMY_NARGS 11
353
354	/* Insert the specified number of args and function address
355	into a call sequence of the above form stored at DUMMYNAME. */
356
357	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
358	{ int flipped = fun \| 0xc0000000; \
359	flip_bytes (&flipped, 4); \
360	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
361	flipped = - nargs * 4; \
362	flip_bytes (&flipped, 4); \
363	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
364	}