[deliverable/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, 1994, 1998, 1999, 2000, 2001
   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "regcache.h"

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

#define TARGET_BYTE_ORDER BFD_ENDIAN_LITTLE

/* 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 (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

/* 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.  */

extern int umax_frame_num_args (struct frame_info *fi);
#define FRAME_NUM_ARGS(fi) (umax_frame_num_args ((fi)))

/* 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 ns32k_localcount (CORE_ADDR enter_pc);

#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)	\
{ 								\
  register int	regmask, regnum;				\
  int		localcount;					\
  register CORE_ADDR	enter_addr;				\
  register CORE_ADDR	next_addr;				\
								\
  memset (&(frame_saved_regs), '\0', sizeof (frame_saved_regs));	\
  enter_addr = ns32k_get_enter_addr ((frame_info)->pc);		\
  if (enter_addr > 1)						\
    {								\
      regmask = read_memory_integer (enter_addr+1, 1) & 0xff;	\
      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));\
    }								\
  else if (enter_addr == 1)					\
    {								\
      CORE_ADDR sp = read_register (SP_REGNUM);			\
      (frame_saved_regs).regs[PC_REGNUM] = sp;			\
      (frame_saved_regs).regs[SP_REGNUM] = sp + 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 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.  */

void flip_bytes (void *ptr, int count);

#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	1	/* Definitions to make GDB run on an encore under umax 4.2
b6ba6518 KB	2	Copyright 1987, 1989, 1991, 1993, 1994, 1998, 1999, 2000, 2001
b6ba6518 KB	3	Free Software Foundation, Inc.
c906108c	4
c5aa993b	5	This file is part of GDB.
c906108c	6
c5aa993b JM	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
c906108c	11
c5aa993b JM	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
c906108c	16
c5aa993b JM	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
c906108c	21
f88e2c52 AC	22	#include "regcache.h"
f88e2c52 AC	23
c906108c SS	24	/* This is also included by tm-ns32km3.h, as well as being used by umax. */
c906108c SS	25
778eb05e	26	#define TARGET_BYTE_ORDER BFD_ENDIAN_LITTLE
c906108c SS	27
	28	/* Need to get function ends by adding this to epilogue address from .bf
	29	record, not using x_fsize field. */
	30	#define FUNCTION_EPILOGUE_SIZE 4
	31
	32	/* Offset from address of function to start of its code.
	33	Zero on most machines. */
	34
	35	#define FUNCTION_START_OFFSET 0
	36
	37	/* Advance PC across any function entry prologue instructions
	38	to reach some "real" code. */
	39
a14ed312	40	extern CORE_ADDR umax_skip_prologue (CORE_ADDR);
b83266a0	41	#define SKIP_PROLOGUE(pc) (umax_skip_prologue (pc))
c906108c SS	42
	43	/* Immediately after a function call, return the saved pc.
	44	Can't always go through the frames for this because on some machines
	45	the new frame is not set up until the new function executes
	46	some instructions. */
	47
	48	#define SAVED_PC_AFTER_CALL(frame) \
	49	read_memory_integer (read_register (SP_REGNUM), 4)
	50
	51	/* Address of end of stack space. */
	52
	53	#ifndef STACK_END_ADDR
	54	#define STACK_END_ADDR (0xfffff000)
	55	#endif
	56
	57	/* Stack grows downward. */
	58
	59	#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
	60
	61	/* Sequence of bytes for breakpoint instruction. */
	62
	63	#define BREAKPOINT {0xf2}
	64
	65	/* Amount PC must be decremented by after a breakpoint.
	66	This is often the number of bytes in BREAKPOINT
	67	but not always. */
	68
	69	#define DECR_PC_AFTER_BREAK 0
	70
c906108c SS	71	/* Say how long (ordinary) registers are. This is a piece of bogosity
	72	used in push_word and a few other places; REGISTER_RAW_SIZE is the
	73	real way to know how big a register is. */
	74
	75	#define REGISTER_SIZE 4
	76
	77	/* Number of machine registers */
	78
	79	#define NUM_REGS 25
	80
	81	#define NUM_GENERAL_REGS 8
	82
	83	/* Initializer for an array of names of registers.
	84	There should be NUM_REGS strings in this initializer. */
	85
	86	#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
	87	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
	88	"sp", "fp", "pc", "ps", \
	89	"fsr", \
	90	"l0", "l1", "l2", "l3", "xx", \
	91	}
	92
	93	/* Register numbers of various important registers.
	94	Note that some of these values are "real" register numbers,
	95	and correspond to the general registers of the machine,
	96	and some are "phony" register numbers which are too large
	97	to be actual register numbers as far as the user is concerned
	98	but do serve to get the desired values when passed to read_register. */
	99
	100	#define R0_REGNUM 0 /* General register 0 */
	101	#define FP0_REGNUM 8 /* Floating point register 0 */
	102	#define SP_REGNUM 16 /* Contains address of top of stack */
	103	#define AP_REGNUM FP_REGNUM
	104	#define FP_REGNUM 17 /* Contains address of executing stack frame */
	105	#define PC_REGNUM 18 /* Contains program counter */
	106	#define PS_REGNUM 19 /* Contains processor status */
	107	#define FPS_REGNUM 20 /* Floating point status register */
	108	#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
	109
	110	/* Total amount of space needed to store our copies of the machine's
	111	register state, the array `registers'. */
	112	#define REGISTER_BYTES \
	113	((NUM_REGS - 4) * REGISTER_RAW_SIZE(R0_REGNUM) \
	114	+ 4 * REGISTER_RAW_SIZE(LP0_REGNUM))
	115
	116	/* Index within `registers' of the first byte of the space for
	117	register N. */
	118
	119	#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
	120	LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
	121
	122	/* Number of bytes of storage in the actual machine representation
	123	for register N. On the 32000, all regs are 4 bytes
	124	except for the doubled floating registers. */
	125
	126	#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
	127
	128	/* Number of bytes of storage in the program's representation
	129	for register N. On the 32000, all regs are 4 bytes
	130	except for the doubled floating registers. */
	131
	132	#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
	133
	134	/* Largest value REGISTER_RAW_SIZE can have. */
135
136	#define MAX_REGISTER_RAW_SIZE 8
137
138	/* Largest value REGISTER_VIRTUAL_SIZE can have. */
139
140	#define MAX_REGISTER_VIRTUAL_SIZE 8
141
142	/* Return the GDB type object for the "standard" data type
143	of data in register N. */
144
145	#define REGISTER_VIRTUAL_TYPE(N) \
146	(((N) < FP0_REGNUM) ? \
147	builtin_type_int : \
148	((N) < FP0_REGNUM + 8) ? \
149	builtin_type_float : \
150	((N) < LP0_REGNUM) ? \
151	builtin_type_int : \
152	builtin_type_double)
153
154	/* Store the address of the place in which to copy the structure the
155	subroutine will return. This is called from call_function.
156
157	On this machine this is a no-op, because gcc isn't used on it
158	yet. So this calling convention is not used. */
159
160	#define STORE_STRUCT_RETURN(ADDR, SP)
161
162	/* Extract from an array REGBUF containing the (raw) register state
163	a function return value of type TYPE, and copy that, in virtual format,
164	into VALBUF. */
165
166	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
167	memcpy (VALBUF, REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), TYPE_LENGTH (TYPE))
168
169	/* Write into appropriate registers a function return value
170	of type TYPE, given in virtual format. */
171
172	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
173	write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), VALBUF, TYPE_LENGTH (TYPE))
174
175	/* Extract from an array REGBUF containing the (raw) register state
176	the address in which a function should return its structure value,
177	as a CORE_ADDR (or an expression that can be used as one). */
178
179	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
180	\f
181	/* Describe the pointer in each stack frame to the previous stack frame
182	(its caller). */
183
184	/* FRAME_CHAIN takes a frame's nominal address
185	and produces the frame's chain-pointer. */
186
187	/* In the case of the ns32000 series, the frame's nominal address is the FP
188	value, and at that address is saved previous FP value as a 4-byte word. */
189
190	#define FRAME_CHAIN(thisframe) \
191	(!inside_entry_file ((thisframe)->pc) ? \
192	read_memory_integer ((thisframe)->frame, 4) :\
193	0)
194
195	/* Define other aspects of the stack frame. */
196
197	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
198
199	/* Compute base of arguments. */
200
201	#define FRAME_ARGS_ADDRESS(fi) \
202	((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
203	((fi)->frame) : (read_register (SP_REGNUM) - 4))
204
205	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
206
207	/* Get the address of the enter opcode for this function, if it is active.
208	Returns positive address > 1 if pc is between enter/exit,
209	1 if pc before enter or after exit, 0 otherwise. */
210
211	extern CORE_ADDR ns32k_get_enter_addr ();
212
f6427ade C	213	/* Return number of args passed to a frame.
	214	Can return -1, meaning no way to tell. */
	215
	216	extern int umax_frame_num_args (struct frame_info *fi);
	217	#define FRAME_NUM_ARGS(fi) (umax_frame_num_args ((fi)))
	218
c906108c SS	219	/* Return number of bytes at start of arglist that are not really args. */
	220
	221	#define FRAME_ARGS_SKIP 8
	222
	223	/* Put here the code to store, into a struct frame_saved_regs,
	224	the addresses of the saved registers of frame described by FRAME_INFO.
	225	This includes special registers such as pc and fp saved in special
	226	ways in the stack frame. sp is even more special:
	227	the address we return for it IS the sp for the next frame. */
	228
381bab78 AC	229	extern int ns32k_localcount (CORE_ADDR enter_pc);
381bab78 AC	230
f6427ade C	231	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
	232	{ \
	233	register int regmask, regnum; \
	234	int localcount; \
	235	register CORE_ADDR enter_addr; \
	236	register CORE_ADDR next_addr; \
	237	\
	238	memset (&(frame_saved_regs), '\0', sizeof (frame_saved_regs)); \
	239	enter_addr = ns32k_get_enter_addr ((frame_info)->pc); \
	240	if (enter_addr > 1) \
	241	{ \
	242	regmask = read_memory_integer (enter_addr+1, 1) & 0xff; \
	243	localcount = ns32k_localcount (enter_addr); \
	244	next_addr = (frame_info)->frame + localcount; \
	245	for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
	246	(frame_saved_regs).regs[regnum] = (regmask & 1) ? \
	247	(next_addr -= 4) : 0; \
	248	(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4;\
	249	(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4;\
	250	(frame_saved_regs).regs[FP_REGNUM] = \
	251	(read_memory_integer ((frame_info)->frame, 4));\
	252	} \
	253	else if (enter_addr == 1) \
	254	{ \
	255	CORE_ADDR sp = read_register (SP_REGNUM); \
	256	(frame_saved_regs).regs[PC_REGNUM] = sp; \
	257	(frame_saved_regs).regs[SP_REGNUM] = sp + 4; \
	258	} \
	259	}
c906108c SS	260	\f
	261	/* Things needed for making the inferior call functions. */
	262
	263	/* Push an empty stack frame, to record the current PC, etc. */
	264
	265	#define PUSH_DUMMY_FRAME \
	266	{ register CORE_ADDR sp = read_register (SP_REGNUM);\
	267	register int regnum; \
	268	sp = push_word (sp, read_register (PC_REGNUM)); \
	269	sp = push_word (sp, read_register (FP_REGNUM)); \
	270	write_register (FP_REGNUM, sp); \
	271	for (regnum = 0; regnum < 8; regnum++) \
	272	sp = push_word (sp, read_register (regnum)); \
	273	write_register (SP_REGNUM, sp); \
	274	}
	275
	276	/* Discard from the stack the innermost frame, restoring all registers. */
	277
	278	#define POP_FRAME \
	279	{ register struct frame_info *frame = get_current_frame (); \
	280	register CORE_ADDR fp; \
	281	register int regnum; \
	282	struct frame_saved_regs fsr; \
	283	struct frame_info *fi; \
	284	fp = frame->frame; \
	285	get_frame_saved_regs (frame, &fsr); \
	286	for (regnum = 0; regnum < 8; regnum++) \
	287	if (fsr.regs[regnum]) \
	288	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
	289	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
	290	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
	291	write_register (SP_REGNUM, fp + 8); \
	292	flush_cached_frames (); \
	293	}
	294
	295	/* This sequence of words is the instructions
c5aa993b JM	296	enter 0xff,0 82 ff 00
	297	jsr @0x00010203 7f ae c0 01 02 03
	298	adjspd 0x69696969 7f a5 01 02 03 04
	299	bpt f2
c906108c SS	300	Note this is 16 bytes. */
	301
	302	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
	303
	304	#define CALL_DUMMY_START_OFFSET 3
	305	#define CALL_DUMMY_LENGTH 16
	306	#define CALL_DUMMY_ADDR 5
	307	#define CALL_DUMMY_NARGS 11
	308
	309	/* Insert the specified number of args and function address
	310	into a call sequence of the above form stored at DUMMYNAME. */
	311
381bab78 AC	312	void flip_bytes (void *ptr, int count);
381bab78 AC	313
c906108c SS	314	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
	315	{ \
	316	int flipped; \
	317	flipped = fun \| 0xc0000000; \
	318	flip_bytes (&flipped, 4); \
	319	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
	320	flipped = - nargs * 4; \
	321	flip_bytes (&flipped, 4); \
	322	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
	323	}