[deliverable/binutils-gdb.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

/* 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. */

/* 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)  \
  (!inside_entry_file ((thisframe)->pc) ? \
   read_memory_integer ((thisframe)->frame, 4) :\
   0)

/* 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
dd3b648e RP	22	/* Define this if the C compiler puts an underscore at the front
	23	of external names before giving them to the linker. */
	24
	25	#define NAMES_HAVE_UNDERSCORE
	26
dd3b648e RP	27	/* Offset from address of function to start of its code.
	28	Zero on most machines. */
	29
	30	#define FUNCTION_START_OFFSET 0
	31
	32	/* Advance PC across any function entry prologue instructions
	33	to reach some "real" code. */
	34
	35	#define SKIP_PROLOGUE(pc) \
	36	{ register int op = read_memory_integer (pc, 1); \
	37	if (op == 0x82) \
	38	{ op = read_memory_integer (pc+2,1); \
	39	if ((op & 0x80) == 0) pc += 3; \
	40	else if ((op & 0xc0) == 0x80) pc += 4; \
	41	else pc += 6; \
	42	}}
	43
	44	/* Immediately after a function call, return the saved pc.
	45	Can't always go through the frames for this because on some machines
	46	the new frame is not set up until the new function executes
	47	some instructions. */
	48
	49	#define SAVED_PC_AFTER_CALL(frame) \
	50	read_memory_integer (read_register (SP_REGNUM), 4)
	51
	52	/* Address of end of stack space. */
	53
	54	#define STACK_END_ADDR (0x800000)
	55
	56	/* Stack grows downward. */
	57
	58	#define INNER_THAN <
	59
	60	/* Sequence of bytes for breakpoint instruction. */
	61
	62	#define BREAKPOINT {0xf2}
	63
	64	/* Amount PC must be decremented by after a breakpoint.
	65	This is often the number of bytes in BREAKPOINT
	66	but not always. */
	67
	68	#define DECR_PC_AFTER_BREAK 0
	69
	70	/* Nonzero if instruction at PC is a return instruction. */
	71
	72	#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
	73
	74	/* Return 1 if P points to an invalid floating point value. */
	75
	76	#define INVALID_FLOAT(p, len) 0
	77
	78	/* Define this to say that the "svc" insn is followed by
	79	codes in memory saying which kind of system call it is. */
	80
	81	#define NS32K_SVC_IMMED_OPERANDS
	82
	83	/* Say how long (ordinary) registers are. */
	84
	85	#define REGISTER_TYPE long
	86
	87	/* Number of machine registers */
	88
	89	#define NUM_REGS 25
	90
91	#define NUM_GENERAL_REGS 8
92
93	/* Initializer for an array of names of registers.
94	There should be NUM_REGS strings in this initializer. */
95
96	#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
97	"pc", "sp", "fp", "ps", \
98	"fsr", \
99	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
100	"l0", "l1", "l2", "l3", "l4", \
101	}
102
103	/* Register numbers of various important registers.
104	Note that some of these values are "real" register numbers,
105	and correspond to the general registers of the machine,
106	and some are "phony" register numbers which are too large
107	to be actual register numbers as far as the user is concerned
108	but do serve to get the desired values when passed to read_register. */
109
110	#define AP_REGNUM FP_REGNUM
111	#define FP_REGNUM 10 /* Contains address of executing stack frame */
112	#define SP_REGNUM 9 /* Contains address of top of stack */
113	#define PC_REGNUM 8 /* Contains program counter */
114	#define PS_REGNUM 11 /* Contains processor status */
115	#define FPS_REGNUM 12 /* Floating point status register */
116	#define FP0_REGNUM 13 /* Floating point register 0 */
117	#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
118
119	/* Total amount of space needed to store our copies of the machine's
120	register state, the array `registers'. */
121	#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
122
123	/* Index within `registers' of the first byte of the space for
124	register N. */
125
126	#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
127	LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
128
129	/* Number of bytes of storage in the actual machine representation
130	for register N. On the 32000, all regs are 4 bytes
131	except for the doubled floating registers. */
132
133	#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
134
135	/* Number of bytes of storage in the program's representation
136	for register N. On the 32000, all regs are 4 bytes
137	except for the doubled floating registers. */
138
139	#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
140
141	/* Largest value REGISTER_RAW_SIZE can have. */
142
143	#define MAX_REGISTER_RAW_SIZE 8
144
145	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
146
147	#define MAX_REGISTER_VIRTUAL_SIZE 8
148
149	/* Nonzero if register N requires conversion
150	from raw format to virtual format. */
151
152	#define REGISTER_CONVERTIBLE(N) 0
153
154	/* Convert data from raw format for register REGNUM
155	to virtual format for register REGNUM. */
156
157	#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
158	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
159
160	/* Convert data from virtual format for register REGNUM
161	to raw format for register REGNUM. */
162
163	#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
164	bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
165
166	/* Return the GDB type object for the "standard" data type
167	of data in register N. */
168
169	#define REGISTER_VIRTUAL_TYPE(N) \
170	((N) >= FP0_REGNUM ? \
171	((N) >= LP0_REGNUM ? \
172	builtin_type_double \
173	: builtin_type_float) \
174	: builtin_type_int)
175
176	/* Store the address of the place in which to copy the structure the
177	subroutine will return. This is called from call_function.
178
179	On this machine this is a no-op, as gcc doesn't run on it yet.
180	This calling convention is not used. */
181
182	#define STORE_STRUCT_RETURN(ADDR, SP)
183
184	/* Extract from an array REGBUF containing the (raw) register state
185	a function return value of type TYPE, and copy that, in virtual format,
186	into VALBUF. */
187
188	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
189	bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE))
190
191	/* Write into appropriate registers a function return value
192	of type TYPE, given in virtual format. */
193
194	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
195	write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
196
197	/* Extract from an array REGBUF containing the (raw) register state
198	the address in which a function should return its structure value,
199	as a CORE_ADDR (or an expression that can be used as one). */
200
201	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
202	\f
203	/* Describe the pointer in each stack frame to the previous stack frame
204	(its caller). */
205
206	/* FRAME_CHAIN takes a frame's nominal address
5e2e79f8	207	and produces the frame's chain-pointer. */
dd3b648e RP	208
	209	/* In the case of the Merlin, the frame's nominal address is the FP value,
	210	and at that address is saved previous FP value as a 4-byte word. */
	211
	212	#define FRAME_CHAIN(thisframe) \
5e2e79f8	213	(!inside_entry_file ((thisframe)->pc) ? \
dd3b648e RP	214	read_memory_integer ((thisframe)->frame, 4) :\
	215	0)
	216
dd3b648e RP	217	/* Define other aspects of the stack frame. */
	218
	219	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
	220
	221	/* compute base of arguments */
	222	#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
	223
	224	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
	225
	226	/* Return number of args passed to a frame.
	227	Can return -1, meaning no way to tell. */
	228
	229	#define FRAME_NUM_ARGS(numargs, fi) \
	230	{ CORE_ADDR pc; \
	231	int insn; \
	232	int addr_mode; \
	233	int width; \
	234	\
	235	pc = FRAME_SAVED_PC (fi); \
	236	insn = read_memory_integer (pc,2); \
	237	addr_mode = (insn >> 11) & 0x1f; \
	238	insn = insn & 0x7ff; \
	239	if ((insn & 0x7fc) == 0x57c \
	240	&& addr_mode == 0x14) /* immediate */ \
	241	{ if (insn == 0x57c) /* adjspb */ \
	242	width = 1; \
	243	else if (insn == 0x57d) /* adjspw */ \
	244	width = 2; \
	245	else if (insn == 0x57f) /* adjspd */ \
	246	width = 4; \
	247	numargs = read_memory_integer (pc+2,width); \
	248	if (width > 1) \
	249	flip_bytes (&numargs, width); \
	250	numargs = - sign_extend (numargs, width*8) / 4; } \
	251	else numargs = -1; \
	252	}
	253
	254	/* Return number of bytes at start of arglist that are not really args. */
	255
	256	#define FRAME_ARGS_SKIP 8
	257
	258	/* Put here the code to store, into a struct frame_saved_regs,
	259	the addresses of the saved registers of frame described by FRAME_INFO.
	260	This includes special registers such as pc and fp saved in special
	261	ways in the stack frame. sp is even more special:
	262	the address we return for it IS the sp for the next frame. */
	263
	264	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
	265	{ int regmask,regnum; \
	266	int localcount; \
	267	CORE_ADDR enter_addr; \
	268	CORE_ADDR next_addr; \
	269	\
	270	enter_addr = get_pc_function_start ((frame_info)->pc); \
	271	regmask = read_memory_integer (enter_addr+1, 1); \
	272	localcount = ns32k_localcount (enter_addr); \
	273	next_addr = (frame_info)->frame + localcount; \
	274	for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
	275	(frame_saved_regs).regs[regnum] \
	276	= (regmask & 1) ? (next_addr -= 4) : 0; \
	277	(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \
	278	(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
	279	(frame_saved_regs).regs[FP_REGNUM] \
	280	= read_memory_integer ((frame_info)->frame, 4); }
281
282	\f
283	/* Things needed for making the inferior call functions. */
284
285	/* Push an empty stack frame, to record the current PC, etc. */
286
287	#define PUSH_DUMMY_FRAME \
288	{ register CORE_ADDR sp = read_register (SP_REGNUM); \
289	register int regnum; \
290	sp = push_word (sp, read_register (PC_REGNUM)); \
291	sp = push_word (sp, read_register (FP_REGNUM)); \
292	write_register (FP_REGNUM, sp); \
293	for (regnum = 0; regnum < 8; regnum++) \
294	sp = push_word (sp, read_register (regnum)); \
295	write_register (SP_REGNUM, sp); \
296	}
297
298	/* Discard from the stack the innermost frame, restoring all registers. */
299
300	#define POP_FRAME \
301	{ register FRAME frame = get_current_frame (); \
302	register CORE_ADDR fp; \
303	register int regnum; \
304	struct frame_saved_regs fsr; \
305	struct frame_info *fi; \
306	fi = get_frame_info (frame); \
307	fp = fi->frame; \
308	get_frame_saved_regs (fi, &fsr); \
309	for (regnum = 0; regnum < 8; regnum++) \
310	if (fsr.regs[regnum]) \
311	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
312	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
313	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
314	write_register (SP_REGNUM, fp + 8); \
315	flush_cached_frames (); \
316	set_current_frame (create_new_frame (read_register (FP_REGNUM),\
317	read_pc ())); \
318	}
319
320	/* This sequence of words is the instructions
321	enter 0xff,0 82 ff 00
322	jsr @0x00010203 7f ae c0 01 02 03
323	adjspd 0x69696969 7f a5 01 02 03 04
324	bpt f2
325	Note this is 16 bytes. */
326
327	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
328
329	#define CALL_DUMMY_START_OFFSET 3
330	#define CALL_DUMMY_LENGTH 16
331	#define CALL_DUMMY_ADDR 5
332	#define CALL_DUMMY_NARGS 11
333
334	/* Insert the specified number of args and function address
335	into a call sequence of the above form stored at DUMMYNAME. */
336
337	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
338	{ int flipped = fun \| 0xc0000000; \
339	flip_bytes (&flipped, 4); \
340	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
341	flipped = - nargs * 4; \
342	flip_bytes (&flipped, 4); \
343	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
344	}