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

/* Definitions to target GDB to a merlin under utek 2.1
   Copyright (C) 1986, 1987, 1989, 1991 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

/* 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	1	/* Definitions to target GDB to a merlin under utek 2.1
fbcb5095	2	Copyright (C) 1986, 1987, 1989, 1991 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	#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
dd3b648e RP	31	/* Offset from address of function to start of its code.
	32	Zero on most machines. */
	33
	34	#define FUNCTION_START_OFFSET 0
	35
	36	/* Advance PC across any function entry prologue instructions
	37	to reach some "real" code. */
	38
	39	#define SKIP_PROLOGUE(pc) \
	40	{ register int op = read_memory_integer (pc, 1); \
	41	if (op == 0x82) \
	42	{ op = read_memory_integer (pc+2,1); \
	43	if ((op & 0x80) == 0) pc += 3; \
	44	else if ((op & 0xc0) == 0x80) pc += 4; \
	45	else pc += 6; \
	46	}}
	47
	48	/* Immediately after a function call, return the saved pc.
	49	Can't always go through the frames for this because on some machines
	50	the new frame is not set up until the new function executes
	51	some instructions. */
	52
	53	#define SAVED_PC_AFTER_CALL(frame) \
	54	read_memory_integer (read_register (SP_REGNUM), 4)
	55
	56	/* Address of end of stack space. */
	57
	58	#define STACK_END_ADDR (0x800000)
	59
	60	/* Stack grows downward. */
	61
	62	#define INNER_THAN <
	63
	64	/* Sequence of bytes for breakpoint instruction. */
	65
	66	#define BREAKPOINT {0xf2}
	67
	68	/* Amount PC must be decremented by after a breakpoint.
	69	This is often the number of bytes in BREAKPOINT
	70	but not always. */
	71
	72	#define DECR_PC_AFTER_BREAK 0
	73
	74	/* Nonzero if instruction at PC is a return instruction. */
	75
	76	#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
	77
	78	/* Return 1 if P points to an invalid floating point value. */
	79
	80	#define INVALID_FLOAT(p, len) 0
	81
	82	/* Define this to say that the "svc" insn is followed by
	83	codes in memory saying which kind of system call it is. */
	84
	85	#define NS32K_SVC_IMMED_OPERANDS
	86
	87	/* Say how long (ordinary) registers are. */
	88
	89	#define REGISTER_TYPE long
	90
	91	/* Number of machine registers */
	92
	93	#define NUM_REGS 25
	94
95	#define NUM_GENERAL_REGS 8
96
97	/* Initializer for an array of names of registers.
98	There should be NUM_REGS strings in this initializer. */
99
100	#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
101	"pc", "sp", "fp", "ps", \
102	"fsr", \
103	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
104	"l0", "l1", "l2", "l3", "l4", \
105	}
106
107	/* Register numbers of various important registers.
108	Note that some of these values are "real" register numbers,
109	and correspond to the general registers of the machine,
110	and some are "phony" register numbers which are too large
111	to be actual register numbers as far as the user is concerned
112	but do serve to get the desired values when passed to read_register. */
113
114	#define AP_REGNUM FP_REGNUM
115	#define FP_REGNUM 10 /* Contains address of executing stack frame */
116	#define SP_REGNUM 9 /* Contains address of top of stack */
117	#define PC_REGNUM 8 /* Contains program counter */
118	#define PS_REGNUM 11 /* Contains processor status */
119	#define FPS_REGNUM 12 /* Floating point status register */
120	#define FP0_REGNUM 13 /* Floating point register 0 */
121	#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
122
123	/* Total amount of space needed to store our copies of the machine's
124	register state, the array `registers'. */
125	#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
126
127	/* Index within `registers' of the first byte of the space for
128	register N. */
129
130	#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
131	LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
132
133	/* Number of bytes of storage in the actual machine representation
134	for register N. On the 32000, all regs are 4 bytes
135	except for the doubled floating registers. */
136
137	#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
138
139	/* Number of bytes of storage in the program's representation
140	for register N. On the 32000, all regs are 4 bytes
141	except for the doubled floating registers. */
142
143	#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
144
145	/* Largest value REGISTER_RAW_SIZE can have. */
146
147	#define MAX_REGISTER_RAW_SIZE 8
148
149	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
150
151	#define MAX_REGISTER_VIRTUAL_SIZE 8
152
153	/* Nonzero if register N requires conversion
154	from raw format to virtual format. */
155
156	#define REGISTER_CONVERTIBLE(N) 0
157
158	/* Convert data from raw format for register REGNUM
159	to virtual format for register REGNUM. */
160
161	#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
162	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
163
164	/* Convert data from virtual format for register REGNUM
165	to raw format for register REGNUM. */
166
167	#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
168	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
169
170	/* Return the GDB type object for the "standard" data type
171	of data in register N. */
172
173	#define REGISTER_VIRTUAL_TYPE(N) \
174	((N) >= FP0_REGNUM ? \
175	((N) >= LP0_REGNUM ? \
176	builtin_type_double \
177	: builtin_type_float) \
178	: builtin_type_int)
179
180	/* Store the address of the place in which to copy the structure the
181	subroutine will return. This is called from call_function.
182
183	On this machine this is a no-op, as gcc doesn't run on it yet.
184	This calling convention is not used. */
185
186	#define STORE_STRUCT_RETURN(ADDR, SP)
187
188	/* Extract from an array REGBUF containing the (raw) register state
189	a function return value of type TYPE, and copy that, in virtual format,
190	into VALBUF. */
191
192	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
193	bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE))
194
195	/* Write into appropriate registers a function return value
196	of type TYPE, given in virtual format. */
197
198	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
199	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
200
201	/* Extract from an array REGBUF containing the (raw) register state
202	the address in which a function should return its structure value,
203	as a CORE_ADDR (or an expression that can be used as one). */
204
205	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
206	\f
207	/* Describe the pointer in each stack frame to the previous stack frame
208	(its caller). */
209
210	/* FRAME_CHAIN takes a frame's nominal address
211	and produces the frame's chain-pointer.
212
213	FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
214	and produces the nominal address of the caller frame.
215
216	However, if FRAME_CHAIN_VALID returns zero,
217	it means the given frame is the outermost one and has no caller.
218	In that case, FRAME_CHAIN_COMBINE is not used. */
219
220	/* In the case of the Merlin, the frame's nominal address is the FP value,
221	and at that address is saved previous FP value as a 4-byte word. */
222
223	#define FRAME_CHAIN(thisframe) \
224	(outside_startup_file ((thisframe)->pc) ? \
225	read_memory_integer ((thisframe)->frame, 4) :\
226	0)
227
228	#define FRAME_CHAIN_VALID(chain, thisframe) \
229	(chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))
230
231	#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
232
233	/* Define other aspects of the stack frame. */
234
235	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
236
237	/* compute base of arguments */
238	#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
239
240	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
241
242	/* Return number of args passed to a frame.
243	Can return -1, meaning no way to tell. */
244
245	#define FRAME_NUM_ARGS(numargs, fi) \
246	{ CORE_ADDR pc; \
247	int insn; \
248	int addr_mode; \
249	int width; \
250	\
251	pc = FRAME_SAVED_PC (fi); \
252	insn = read_memory_integer (pc,2); \
253	addr_mode = (insn >> 11) & 0x1f; \
254	insn = insn & 0x7ff; \
255	if ((insn & 0x7fc) == 0x57c \
256	&& addr_mode == 0x14) /* immediate */ \
257	{ if (insn == 0x57c) /* adjspb */ \
258	width = 1; \
259	else if (insn == 0x57d) /* adjspw */ \
260	width = 2; \
261	else if (insn == 0x57f) /* adjspd */ \
262	width = 4; \
263	numargs = read_memory_integer (pc+2,width); \
264	if (width > 1) \
265	flip_bytes (&numargs, width); \
266	numargs = - sign_extend (numargs, width*8) / 4; } \
267	else numargs = -1; \
268	}
269
270	/* Return number of bytes at start of arglist that are not really args. */
271
272	#define FRAME_ARGS_SKIP 8
273
274	/* Put here the code to store, into a struct frame_saved_regs,
275	the addresses of the saved registers of frame described by FRAME_INFO.
276	This includes special registers such as pc and fp saved in special
277	ways in the stack frame. sp is even more special:
278	the address we return for it IS the sp for the next frame. */
279
280	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
281	{ int regmask,regnum; \
282	int localcount; \
283	CORE_ADDR enter_addr; \
284	CORE_ADDR next_addr; \
285	\
286	enter_addr = get_pc_function_start ((frame_info)->pc); \
287	regmask = read_memory_integer (enter_addr+1, 1); \
288	localcount = ns32k_localcount (enter_addr); \
289	next_addr = (frame_info)->frame + localcount; \
290	for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
291	(frame_saved_regs).regs[regnum] \
292	= (regmask & 1) ? (next_addr -= 4) : 0; \
293	(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \
294	(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
295	(frame_saved_regs).regs[FP_REGNUM] \
296	= read_memory_integer ((frame_info)->frame, 4); }
297
298	\f
299	/* Things needed for making the inferior call functions. */
300
301	/* Push an empty stack frame, to record the current PC, etc. */
302
303	#define PUSH_DUMMY_FRAME \
304	{ register CORE_ADDR sp = read_register (SP_REGNUM); \
305	register int regnum; \
306	sp = push_word (sp, read_register (PC_REGNUM)); \
307	sp = push_word (sp, read_register (FP_REGNUM)); \
308	write_register (FP_REGNUM, sp); \
309	for (regnum = 0; regnum < 8; regnum++) \
310	sp = push_word (sp, read_register (regnum)); \
311	write_register (SP_REGNUM, sp); \
312	}
313
314	/* Discard from the stack the innermost frame, restoring all registers. */
315
316	#define POP_FRAME \
317	{ register FRAME frame = get_current_frame (); \
318	register CORE_ADDR fp; \
319	register int regnum; \
320	struct frame_saved_regs fsr; \
321	struct frame_info *fi; \
322	fi = get_frame_info (frame); \
323	fp = fi->frame; \
324	get_frame_saved_regs (fi, &fsr); \
325	for (regnum = 0; regnum < 8; regnum++) \
326	if (fsr.regs[regnum]) \
327	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
328	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
329	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
330	write_register (SP_REGNUM, fp + 8); \
331	flush_cached_frames (); \
332	set_current_frame (create_new_frame (read_register (FP_REGNUM),\
333	read_pc ())); \
334	}
335
336	/* This sequence of words is the instructions
337	enter 0xff,0 82 ff 00
338	jsr @0x00010203 7f ae c0 01 02 03
339	adjspd 0x69696969 7f a5 01 02 03 04
340	bpt f2
341	Note this is 16 bytes. */
342
343	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
344
345	#define CALL_DUMMY_START_OFFSET 3
346	#define CALL_DUMMY_LENGTH 16
347	#define CALL_DUMMY_ADDR 5
348	#define CALL_DUMMY_NARGS 11
349
350	/* Insert the specified number of args and function address
351	into a call sequence of the above form stored at DUMMYNAME. */
352
353	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
354	{ int flipped = fun \| 0xc0000000; \
355	flip_bytes (&flipped, 4); \
356	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
357	flipped = - nargs * 4; \
358	flip_bytes (&flipped, 4); \
359	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
360	}