[binutils.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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#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.  */

#define SKIP_PROLOGUE(pc)   				\
{ register unsigned char 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 (0xfffff000)

/* 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)

#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))

/* 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",	\
 			"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

/* 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)	\
  memcpy ((TO), (FROM), 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)	\
  memcpy ((TO), (FROM), 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) ?				\
		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.  */

#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 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;					\
	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
5076de82 FF	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., 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20	#define TARGET_BYTE_ORDER LITTLE_ENDIAN
	21
	22	/* Need to get function ends by adding this to epilogue address from .bf
	23	record, not using x_fsize field. */
	24	#define FUNCTION_EPILOGUE_SIZE 4
	25
	26	/* Offset from address of function to start of its code.
	27	Zero on most machines. */
	28
	29	#define FUNCTION_START_OFFSET 0
	30
	31	/* Advance PC across any function entry prologue instructions
	32	to reach some "real" code. */
	33
	34	#define SKIP_PROLOGUE(pc) \
	35	{ register unsigned char op = read_memory_integer (pc, 1); \
	36	if (op == 0x82) { op = read_memory_integer (pc+2,1); \
	37	if ((op & 0x80) == 0) pc += 3; \
	38	else if ((op & 0xc0) == 0x80) pc += 4; \
	39	else pc += 6; \
	40	} \
	41	}
	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	#define STACK_END_ADDR (0xfffff000)
	54
	55	/* Stack grows downward. */
	56
	57	#define INNER_THAN <
	58
	59	/* Sequence of bytes for breakpoint instruction. */
	60
	61	#define BREAKPOINT {0xf2}
	62
	63	/* Amount PC must be decremented by after a breakpoint.
	64	This is often the number of bytes in BREAKPOINT
65	but not always. */
66
67	#define DECR_PC_AFTER_BREAK 0
68
69	/* Nonzero if instruction at PC is a return instruction. */
70
71	#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
72
73	#ifndef NaN
74	#include <nan.h>
75	#endif NaN
76
77	/* Return 1 if P points to an invalid floating point value. */
78	/* Surely wrong for cross-debugging. */
79	#define INVALID_FLOAT(p, s) \
80	((s == sizeof (float))? \
81	NaF ((float ) p) : \
82	NaD ((double ) p))
83
84	/* Say how long (ordinary) registers are. */
85
86	#define REGISTER_TYPE long
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	/* 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) \
ade40d31	162	memcpy ((TO), (FROM), REGISTER_VIRTUAL_SIZE(REGNUM));
5076de82 FF	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) \
ade40d31	168	memcpy ((TO), (FROM), REGISTER_VIRTUAL_SIZE(REGNUM));
5076de82 FF	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	builtin_type_int : \
	176	((N) < FP0_REGNUM + 8) ? \
	177	builtin_type_float : \
	178	((N) < LP0_REGNUM) ? \
	179	builtin_type_int : \
	180	builtin_type_double)
	181
	182	/* Store the address of the place in which to copy the structure the
	183	subroutine will return. This is called from call_function.
	184
	185	On this machine this is a no-op, because gcc isn't used on it
	186	yet. So this calling convention is not used. */
	187
	188	#define STORE_STRUCT_RETURN(ADDR, SP)
	189
	190	/* Extract from an array REGBUF containing the (raw) register state
	191	a function return value of type TYPE, and copy that, in virtual format,
	192	into VALBUF. */
	193
	194	#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
ade40d31	195	memcpy (VALBUF, REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), TYPE_LENGTH (TYPE))
5076de82 FF	196
	197	/* Write into appropriate registers a function return value
	198	of type TYPE, given in virtual format. */
	199
	200	#define STORE_RETURN_VALUE(TYPE,VALBUF) \
	201	write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), VALBUF, TYPE_LENGTH (TYPE))
	202
	203	/* Extract from an array REGBUF containing the (raw) register state
	204	the address in which a function should return its structure value,
	205	as a CORE_ADDR (or an expression that can be used as one). */
	206
	207	#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) ((int )(REGBUF))
	208	\f
	209	/* Describe the pointer in each stack frame to the previous stack frame
	210	(its caller). */
	211
	212	/* FRAME_CHAIN takes a frame's nominal address
	213	and produces the frame's chain-pointer. */
	214
	215	/* In the case of the ns32000 series, the frame's nominal address is the FP
	216	value, and at that address is saved previous FP value as a 4-byte word. */
	217
	218	#define FRAME_CHAIN(thisframe) \
	219	(!inside_entry_file ((thisframe)->pc) ? \
	220	read_memory_integer ((thisframe)->frame, 4) :\
	221	0)
	222
	223	/* Define other aspects of the stack frame. */
	224
	225	#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
	226
	227	/* Compute base of arguments. */
	228
	229	#define FRAME_ARGS_ADDRESS(fi) \
	230	((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
	231	((fi)->frame) : (read_register (SP_REGNUM) - 4))
	232
	233	#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
	234
	235	/* Get the address of the enter opcode for this function, if it is active.
	236	Returns positive address > 1 if pc is between enter/exit,
	237	1 if pc before enter or after exit, 0 otherwise. */
	238
	239	extern CORE_ADDR ns32k_get_enter_addr ();
	240
	241	/* Return number of args passed to a frame.
	242	Can return -1, meaning no way to tell.
	243	Encore's C compiler often reuses same area on stack for args,
	244	so this will often not work properly. If the arg names
	245	are known, it's likely most of them will be printed. */
	246
	247	#define FRAME_NUM_ARGS(numargs, fi) \
	248	{ CORE_ADDR pc; \
	249	CORE_ADDR enter_addr; \
	250	unsigned int insn; \
	251	unsigned int addr_mode; \
	252	int width; \
	253	\
	254	numargs = -1; \
	255	enter_addr = ns32k_get_enter_addr ((fi)->pc); \
	256	if (enter_addr > 0) \
	257	{ \
	258	pc = (enter_addr == 1) ? \
	259	SAVED_PC_AFTER_CALL (fi) : \
260	FRAME_SAVED_PC (fi); \
261	insn = read_memory_integer (pc,2); \
262	addr_mode = (insn >> 11) & 0x1f; \
263	insn = insn & 0x7ff; \
264	if ((insn & 0x7fc) == 0x57c && \
265	addr_mode == 0x14) /* immediate */ \
266	{ \
267	if (insn == 0x57c) /* adjspb */ \
268	width = 1; \
269	else if (insn == 0x57d) /* adjspw */ \
270	width = 2; \
271	else if (insn == 0x57f) /* adjspd */ \
272	width = 4; \
273	numargs = read_memory_integer (pc+2,width); \
274	if (width > 1) \
275	flip_bytes (&numargs, width); \
276	numargs = - sign_extend (numargs, width*8) / 4;\
277	} \
278	} \
279	}
280
281	/* Return number of bytes at start of arglist that are not really args. */
282
283	#define FRAME_ARGS_SKIP 8
284
285	/* Put here the code to store, into a struct frame_saved_regs,
286	the addresses of the saved registers of frame described by FRAME_INFO.
287	This includes special registers such as pc and fp saved in special
288	ways in the stack frame. sp is even more special:
289	the address we return for it IS the sp for the next frame. */
290
291	#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
292	{ \
293	register int regmask, regnum; \
294	int localcount; \
295	register CORE_ADDR enter_addr; \
296	register CORE_ADDR next_addr; \
297	\
4ed97c9a	298	memset (&(frame_saved_regs), '\0', sizeof (frame_saved_regs)); \
5076de82 FF	299	enter_addr = ns32k_get_enter_addr ((frame_info)->pc); \
	300	if (enter_addr > 1) \
	301	{ \
	302	regmask = read_memory_integer (enter_addr+1, 1) & 0xff; \
	303	localcount = ns32k_localcount (enter_addr); \
	304	next_addr = (frame_info)->frame + localcount; \
	305	for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
	306	(frame_saved_regs).regs[regnum] = (regmask & 1) ? \
	307	(next_addr -= 4) : 0; \
	308	(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4;\
	309	(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4;\
	310	(frame_saved_regs).regs[FP_REGNUM] = \
	311	(read_memory_integer ((frame_info)->frame, 4));\
	312	} \
	313	else if (enter_addr == 1) \
	314	{ \
	315	CORE_ADDR sp = read_register (SP_REGNUM); \
	316	(frame_saved_regs).regs[PC_REGNUM] = sp; \
	317	(frame_saved_regs).regs[SP_REGNUM] = sp + 4; \
	318	} \
	319	}
	320	\f
	321	/* Things needed for making the inferior call functions. */
	322
	323	/* Push an empty stack frame, to record the current PC, etc. */
	324
	325	#define PUSH_DUMMY_FRAME \
	326	{ register CORE_ADDR sp = read_register (SP_REGNUM);\
	327	register int regnum; \
	328	sp = push_word (sp, read_register (PC_REGNUM)); \
	329	sp = push_word (sp, read_register (FP_REGNUM)); \
	330	write_register (FP_REGNUM, sp); \
	331	for (regnum = 0; regnum < 8; regnum++) \
	332	sp = push_word (sp, read_register (regnum)); \
	333	write_register (SP_REGNUM, sp); \
	334	}
	335
	336	/* Discard from the stack the innermost frame, restoring all registers. */
	337
	338	#define POP_FRAME \
	339	{ register FRAME frame = get_current_frame (); \
	340	register CORE_ADDR fp; \
	341	register int regnum; \
	342	struct frame_saved_regs fsr; \
	343	struct frame_info *fi; \
	344	fi = get_frame_info (frame); \
	345	fp = fi->frame; \
	346	get_frame_saved_regs (fi, &fsr); \
	347	for (regnum = 0; regnum < 8; regnum++) \
	348	if (fsr.regs[regnum]) \
	349	write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
	350	write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
	351	write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
	352	write_register (SP_REGNUM, fp + 8); \
	353	flush_cached_frames (); \
	354	set_current_frame (create_new_frame (read_register (FP_REGNUM),\
	355	read_pc ())); }
	356
	357	/* This sequence of words is the instructions
	358	enter 0xff,0 82 ff 00
	359	jsr @0x00010203 7f ae c0 01 02 03
	360	adjspd 0x69696969 7f a5 01 02 03 04
	361	bpt f2
	362	Note this is 16 bytes. */
363
364	#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
365
366	#define CALL_DUMMY_START_OFFSET 3
367	#define CALL_DUMMY_LENGTH 16
368	#define CALL_DUMMY_ADDR 5
369	#define CALL_DUMMY_NARGS 11
370
371	/* Insert the specified number of args and function address
372	into a call sequence of the above form stored at DUMMYNAME. */
373
374	#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
375	{ \
376	int flipped; \
377	flipped = fun \| 0xc0000000; \
378	flip_bytes (&flipped, 4); \
379	((int ) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
380	flipped = - nargs * 4; \
381	flip_bytes (&flipped, 4); \
382	((int ) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
383	}