[thirdparty/binutils-gdb.git] / gdb / config / ns32k / tm-umax.h

/* Definitions to make GDB run on an encore under umax 4.2
   Copyright 1987, 1989, 1991, 1993 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.  */

/* This is also included by tm-ns32km3.h, as well as being used by umax.  */

#define TARGET_BYTE_ORDER LITTLE_ENDIAN

/* Need to get function ends by adding this to epilogue address from .bf
   record, not using x_fsize field.  */
#define FUNCTION_EPILOGUE_SIZE 4

/* 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.  */

extern CORE_ADDR umax_skip_prologue PARAMS ((CORE_ADDR));
#define SKIP_PROLOGUE(pc) (umax_skip_prologue (pc))

/* 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.  */

#ifndef STACK_END_ADDR
#define STACK_END_ADDR (0xfffff000)
#endif

/* Stack grows downward.  */

#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))

/* 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

#if 0 /* Disable until fixed *correctly*.  */
#ifndef INVALID_FLOAT
#ifndef NaN
#include <nan.h>
#endif NaN

/* Return 1 if P points to an invalid floating point value.  */
/* Surely wrong for cross-debugging.  */
#define INVALID_FLOAT(p, s) \
	 ((s == sizeof (float))?	\
		NaF (*(float *) p) :	\
		NaD (*(double *) p))
#endif /* INVALID_FLOAT */
#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.  */

#define REGISTER_SIZE 4

/* 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",	\
 			"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",	\
			"sp", "fp", "pc", "ps",				\
 			"fsr",						\
			"l0", "l1", "l2", "l3", "xx",			\
 			}

/* 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	R0_REGNUM 0		/* General register 0 */
#define FP0_REGNUM 8		/* Floating point register 0 */
#define SP_REGNUM 16		/* Contains address of top of stack */
#define AP_REGNUM FP_REGNUM
#define FP_REGNUM 17		/* Contains address of executing stack frame */
#define PC_REGNUM 18		/* Contains program counter */
#define PS_REGNUM 19		/* Contains processor status */
#define FPS_REGNUM 20		/* Floating point status register */
#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) * REGISTER_RAW_SIZE(R0_REGNUM) \
   + 4            * REGISTER_RAW_SIZE(LP0_REGNUM))

/* 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

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

#define REGISTER_VIRTUAL_TYPE(N) \
	(((N) < FP0_REGNUM) ?				\
		builtin_type_int :			\
		((N) < FP0_REGNUM + 8) ?		\
			builtin_type_float :		\
			((N) < LP0_REGNUM) ?		\
				builtin_type_int :	\
				builtin_type_double)

/* 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, because gcc isn't used on it
   yet.  So 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) \
  memcpy (VALBUF, REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), 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 (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 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 ns32000 series, 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)	\
  ((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
	((fi)->frame) : (read_register (SP_REGNUM) - 4))

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

/* Get the address of the enter opcode for this function, if it is active.
   Returns positive address > 1 if pc is between enter/exit,
   1 if pc before enter or after exit, 0 otherwise. */

extern CORE_ADDR ns32k_get_enter_addr ();

/* Return number of args passed to a frame.
   Can return -1, meaning no way to tell.
   Encore's C compiler often reuses same area on stack for args,
   so this will often not work properly.  If the arg names
   are known, it's likely most of them will be printed. */

#define FRAME_NUM_ARGS(numargs, fi)			\
{ CORE_ADDR	pc;					\
  CORE_ADDR	enter_addr;				\
  unsigned int	insn;					\
  unsigned int	addr_mode;				\
  int width;						\
							\
  numargs = -1;						\
  enter_addr = ns32k_get_enter_addr ((fi)->pc);		\
  if (enter_addr > 0)					\
    {							\
      pc = (enter_addr == 1) ?				\
	SAVED_PC_AFTER_CALL (fi) :			\
	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;\
	}						\
    }							\
}

/* 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.  */

extern int umax_frame_num_args PARAMS ((struct frame_info *fi));
#define FRAME_NUM_ARGS (umax_frame_num_args ((fi)))
\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 struct frame_info *frame = get_current_frame ();	 \
  register CORE_ADDR fp;					 \
  register int regnum;						 \
  struct frame_saved_regs fsr;					 \
  struct frame_info *fi;						 \
  fp = frame->frame;						 \
  get_frame_saved_regs (frame, &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 ();					 \
}

/* 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;					\
	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
c906108c SS	1	/* Definitions to make GDB run on an encore under umax 4.2
	2	Copyright 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	19
	20	/* This is also included by tm-ns32km3.h, as well as being used by umax. */
	21
	22	#define TARGET_BYTE_ORDER LITTLE_ENDIAN
	23
	24	/* Need to get function ends by adding this to epilogue address from .bf
	25	record, not using x_fsize field. */
	26	#define FUNCTION_EPILOGUE_SIZE 4
	27
	28	/* Offset from address of function to start of its code.
	29	Zero on most machines. */
	30
	31	#define FUNCTION_START_OFFSET 0
	32
	33	/* Advance PC across any function entry prologue instructions
	34	to reach some "real" code. */
	35
b83266a0 SS	36	extern CORE_ADDR umax_skip_prologue PARAMS ((CORE_ADDR));
b83266a0 SS	37	#define SKIP_PROLOGUE(pc) (umax_skip_prologue (pc))
c906108c SS	38
	39	/* Immediately after a function call, return the saved pc.
	40	Can't always go through the frames for this because on some machines
	41	the new frame is not set up until the new function executes
	42	some instructions. */
	43
	44	#define SAVED_PC_AFTER_CALL(frame) \
	45	read_memory_integer (read_register (SP_REGNUM), 4)
	46
	47	/* Address of end of stack space. */
	48
	49	#ifndef STACK_END_ADDR
	50	#define STACK_END_ADDR (0xfffff000)
	51	#endif
	52
	53	/* Stack grows downward. */
	54
	55	#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
	56
	57	/* Sequence of bytes for breakpoint instruction. */
	58
	59	#define BREAKPOINT {0xf2}
	60
	61	/* Amount PC must be decremented by after a breakpoint.
	62	This is often the number of bytes in BREAKPOINT
	63	but not always. */
	64
	65	#define DECR_PC_AFTER_BREAK 0
	66
	67	#if 0 /* Disable until fixed correctly. */
	68	#ifndef INVALID_FLOAT
	69	#ifndef NaN
	70	#include <nan.h>
	71	#endif NaN
	72
	73	/* Return 1 if P points to an invalid floating point value. */
	74	/* Surely wrong for cross-debugging. */
	75	#define INVALID_FLOAT(p, s) \
	76	((s == sizeof (float))? \
	77	NaF ((float ) p) : \
	78	NaD ((double ) p))
	79	#endif /* INVALID_FLOAT */
	80	#endif
	81
	82	/* Say how long (ordinary) registers are. This is a piece of bogosity
	83	used in push_word and a few other places; REGISTER_RAW_SIZE is the
	84	real way to know how big a register is. */
	85
	86	#define REGISTER_SIZE 4
	87
	88	/* Number of machine registers */
	89
	90	#define NUM_REGS 25
	91
	92	#define NUM_GENERAL_REGS 8
	93
	94	/* Initializer for an array of names of registers.
	95	There should be NUM_REGS strings in this initializer. */
	96
	97	#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
	98	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
	99	"sp", "fp", "pc", "ps", \
	100	"fsr", \
	101	"l0", "l1", "l2", "l3", "xx", \
102	}
103
104	/* Register numbers of various important registers.
105	Note that some of these values are "real" register numbers,
106	and correspond to the general registers of the machine,
107	and some are "phony" register numbers which are too large
108	to be actual register numbers as far as the user is concerned
109	but do serve to get the desired values when passed to read_register. */
110
111	#define R0_REGNUM 0 /* General register 0 */
112	#define FP0_REGNUM 8 /* Floating point register 0 */
113	#define SP_REGNUM 16 /* Contains address of top of stack */
114	#define AP_REGNUM FP_REGNUM
115	#define FP_REGNUM 17 /* Contains address of executing stack frame */
116	#define PC_REGNUM 18 /* Contains program counter */
117	#define PS_REGNUM 19 /* Contains processor status */
118	#define FPS_REGNUM 20 /* Floating point status register */
119	#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
120
121	/* Total amount of space needed to store our copies of the machine's
122	register state, the array `registers'. */
123	#define REGISTER_BYTES \
124	((NUM_REGS - 4) * REGISTER_RAW_SIZE(R0_REGNUM) \
125	+ 4 * REGISTER_RAW_SIZE(LP0_REGNUM))
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	/* Return the GDB type object for the "standard" data type
154	of data in register N. */
155
156	#define REGISTER_VIRTUAL_TYPE(N) \
157	(((N) < FP0_REGNUM) ? \
158	builtin_type_int : \
159	((N) < FP0_REGNUM + 8) ? \
160	builtin_type_float : \
161	((N) < LP0_REGNUM) ? \
162	builtin_type_int : \
163	builtin_type_double)
164
165	/* Store the address of the place in which to copy the structure the
166	subroutine will return. This is called from call_function.
167
168	On this machine this is a no-op, because gcc isn't used on it
169	yet. So this calling convention is not used. */
170
171	#define STORE_STRUCT_RETURN(ADDR, SP)
172
173	/* Extract from an array REGBUF containing the (raw) register state
174	a function return value of type TYPE, and copy that, in virtual format,
175	into VALBUF. */
176
177	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
178	memcpy (VALBUF, REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), TYPE_LENGTH (TYPE))
179
180	/* Write into appropriate registers a function return value
181	of type TYPE, given in virtual format. */
182
183	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
184	write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), VALBUF, TYPE_LENGTH (TYPE))
185
186	/* Extract from an array REGBUF containing the (raw) register state
187	the address in which a function should return its structure value,
188	as a CORE_ADDR (or an expression that can be used as one). */
189
190	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
191	\f
192	/* Describe the pointer in each stack frame to the previous stack frame
193	(its caller). */
194
195	/* FRAME_CHAIN takes a frame's nominal address
196	and produces the frame's chain-pointer. */
197
198	/* In the case of the ns32000 series, the frame's nominal address is the FP
199	value, and at that address is saved previous FP value as a 4-byte word. */
200
201	#define FRAME_CHAIN(thisframe) \
202	(!inside_entry_file ((thisframe)->pc) ? \
203	read_memory_integer ((thisframe)->frame, 4) :\
204	0)
205
206	/* Define other aspects of the stack frame. */
207
208	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
209
210	/* Compute base of arguments. */
211
212	#define FRAME_ARGS_ADDRESS(fi) \
213	((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
214	((fi)->frame) : (read_register (SP_REGNUM) - 4))
215
216	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
217
218	/* Get the address of the enter opcode for this function, if it is active.
219	Returns positive address > 1 if pc is between enter/exit,
220	1 if pc before enter or after exit, 0 otherwise. */
221
222	extern CORE_ADDR ns32k_get_enter_addr ();
223
224	/* Return number of args passed to a frame.
225	Can return -1, meaning no way to tell.
226	Encore's C compiler often reuses same area on stack for args,
227	so this will often not work properly. If the arg names
228	are known, it's likely most of them will be printed. */
229
230	#define FRAME_NUM_ARGS(numargs, fi) \
231	{ CORE_ADDR pc; \
232	CORE_ADDR enter_addr; \
233	unsigned int insn; \
234	unsigned int addr_mode; \
235	int width; \
236	\
237	numargs = -1; \
238	enter_addr = ns32k_get_enter_addr ((fi)->pc); \
239	if (enter_addr > 0) \
240	{ \
241	pc = (enter_addr == 1) ? \
242	SAVED_PC_AFTER_CALL (fi) : \
243	FRAME_SAVED_PC (fi); \
244	insn = read_memory_integer (pc,2); \
245	addr_mode = (insn >> 11) & 0x1f; \
246	insn = insn & 0x7ff; \
247	if ((insn & 0x7fc) == 0x57c && \
248	addr_mode == 0x14) /* immediate */ \
249	{ \
250	if (insn == 0x57c) /* adjspb */ \
251	width = 1; \
252	else if (insn == 0x57d) /* adjspw */ \
253	width = 2; \
254	else if (insn == 0x57f) /* adjspd */ \
255	width = 4; \
256	numargs = read_memory_integer (pc+2,width); \
257	if (width > 1) \
258	flip_bytes (&numargs, width); \
259	numargs = - sign_extend (numargs, width*8) / 4;\
260	} \
261	} \
262	}
263
264	/* Return number of bytes at start of arglist that are not really args. */
265
266	#define FRAME_ARGS_SKIP 8
267
268	/* Put here the code to store, into a struct frame_saved_regs,
269	the addresses of the saved registers of frame described by FRAME_INFO.
270	This includes special registers such as pc and fp saved in special
271	ways in the stack frame. sp is even more special:
272	the address we return for it IS the sp for the next frame. */
273
392a587b JM	274	extern int umax_frame_num_args PARAMS ((struct frame_info *fi));
392a587b JM	275	#define FRAME_NUM_ARGS (umax_frame_num_args ((fi)))
c906108c SS	276	\f
	277	/* Things needed for making the inferior call functions. */
	278
	279	/* Push an empty stack frame, to record the current PC, etc. */
	280
	281	#define PUSH_DUMMY_FRAME \
	282	{ register CORE_ADDR sp = read_register (SP_REGNUM);\
	283	register int regnum; \
	284	sp = push_word (sp, read_register (PC_REGNUM)); \
	285	sp = push_word (sp, read_register (FP_REGNUM)); \
	286	write_register (FP_REGNUM, sp); \
	287	for (regnum = 0; regnum < 8; regnum++) \
	288	sp = push_word (sp, read_register (regnum)); \
	289	write_register (SP_REGNUM, sp); \
	290	}
	291
	292	/* Discard from the stack the innermost frame, restoring all registers. */
	293
	294	#define POP_FRAME \
	295	{ register struct frame_info *frame = get_current_frame (); \
	296	register CORE_ADDR fp; \
	297	register int regnum; \
	298	struct frame_saved_regs fsr; \
	299	struct frame_info *fi; \
	300	fp = frame->frame; \
	301	get_frame_saved_regs (frame, &fsr); \
	302	for (regnum = 0; regnum < 8; regnum++) \
	303	if (fsr.regs[regnum]) \
	304	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
	305	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
	306	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
	307	write_register (SP_REGNUM, fp + 8); \
	308	flush_cached_frames (); \
	309	}
	310
	311	/* This sequence of words is the instructions
	312	enter 0xff,0 82 ff 00
	313	jsr @0x00010203 7f ae c0 01 02 03
	314	adjspd 0x69696969 7f a5 01 02 03 04
	315	bpt f2
	316	Note this is 16 bytes. */
	317
	318	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
	319
	320	#define CALL_DUMMY_START_OFFSET 3
	321	#define CALL_DUMMY_LENGTH 16
	322	#define CALL_DUMMY_ADDR 5
	323	#define CALL_DUMMY_NARGS 11
	324
	325	/* Insert the specified number of args and function address
	326	into a call sequence of the above form stored at DUMMYNAME. */
	327
	328	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
	329	{ \
	330	int flipped; \
	331	flipped = fun \| 0xc0000000; \
	332	flip_bytes (&flipped, 4); \
	333	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
	334	flipped = - nargs * 4; \
	335	flip_bytes (&flipped, 4); \
	336	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
	337	}