[thirdparty/binutils-gdb.git] / gdb / z8k-tdep.c

/* Target-machine dependent code for Zilog Z8000, for GDB.
   Copyright (C) 1992, 1993, 1994 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.  */

/*
   Contributed by Steve Chamberlain
   sac@cygnus.com
 */

#include "defs.h"
#include "frame.h"
#include "obstack.h"
#include "symtab.h"
#include "gdbcmd.h"
#include "gdbtypes.h"
#include "dis-asm.h"
#include "gdbcore.h"

#include "value.h" /* For read_register() */


static int read_memory_pointer (CORE_ADDR x);

/* Return the saved PC from this frame.

   If the frame has a memory copy of SRP_REGNUM, use that.  If not,
   just use the register SRP_REGNUM itself.  */

CORE_ADDR
z8k_frame_saved_pc (frame)
     struct frame_info *frame;
{
  return read_memory_pointer (frame->frame + (BIG ? 4 : 2));
}

#define IS_PUSHL(x) (BIG ? ((x & 0xfff0) == 0x91e0):((x & 0xfff0) == 0x91F0))
#define IS_PUSHW(x) (BIG ? ((x & 0xfff0) == 0x93e0):((x & 0xfff0)==0x93f0))
#define IS_MOVE_FP(x) (BIG ? x == 0xa1ea : x == 0xa1fa)
#define IS_MOV_SP_FP(x) (BIG ? x == 0x94ea : x == 0x0d76)
#define IS_SUB2_SP(x) (x==0x1b87)
#define IS_MOVK_R5(x) (x==0x7905)
#define IS_SUB_SP(x) ((x & 0xffff) == 0x020f)
#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa))

/* work out how much local space is on the stack and
   return the pc pointing to the first push */

static CORE_ADDR
skip_adjust (pc, size)
     CORE_ADDR pc;
     int *size;
{
  *size = 0;

  if (IS_PUSH_FP (read_memory_short (pc))
      && IS_MOV_SP_FP (read_memory_short (pc + 2)))
    {
      /* This is a function with an explict frame pointer */
      pc += 4;
      *size += 2;		/* remember the frame pointer */
    }

  /* remember any stack adjustment */
  if (IS_SUB_SP (read_memory_short (pc)))
    {
      *size += read_memory_short (pc + 2);
      pc += 4;
    }
  return pc;
}

static CORE_ADDR examine_frame PARAMS ((CORE_ADDR, CORE_ADDR * regs, CORE_ADDR));
static CORE_ADDR
examine_frame (pc, regs, sp)
     CORE_ADDR pc;
     CORE_ADDR *regs;
     CORE_ADDR sp;
{
  int w = read_memory_short (pc);
  int offset = 0;
  int regno;

  for (regno = 0; regno < NUM_REGS; regno++)
    regs[regno] = 0;

  while (IS_PUSHW (w) || IS_PUSHL (w))
    {
      /* work out which register is being pushed to where */
      if (IS_PUSHL (w))
	{
	  regs[w & 0xf] = offset;
	  regs[(w & 0xf) + 1] = offset + 2;
	  offset += 4;
	}
      else
	{
	  regs[w & 0xf] = offset;
	  offset += 2;
	}
      pc += 2;
      w = read_memory_short (pc);
    }

  if (IS_MOVE_FP (w))
    {
      /* We know the fp */

    }
  else if (IS_SUB_SP (w))
    {
      /* Subtracting a value from the sp, so were in a function
         which needs stack space for locals, but has no fp.  We fake up
         the values as if we had an fp */
      regs[FP_REGNUM] = sp;
    }
  else
    {
      /* This one didn't have an fp, we'll fake it up */
      regs[SP_REGNUM] = sp;
    }
  /* stack pointer contains address of next frame */
  /*  regs[fp_regnum()] = fp; */
  regs[SP_REGNUM] = sp;
  return pc;
}

CORE_ADDR
z8k_skip_prologue (start_pc)
     CORE_ADDR start_pc;
{
  CORE_ADDR dummy[NUM_REGS];

  return examine_frame (start_pc, dummy, 0);
}

CORE_ADDR
z8k_addr_bits_remove (addr)
     CORE_ADDR addr;
{
  return (addr & PTR_MASK);
}

static int
read_memory_pointer (CORE_ADDR x)
{
  return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2);
}

CORE_ADDR
z8k_frame_chain (thisframe)
     struct frame_info *thisframe;
{
  if (thisframe->prev == 0)
    {
      /* This is the top of the stack, let's get the sp for real */
    }
  if (!inside_entry_file (thisframe->pc))
    {
      return read_memory_pointer (thisframe->frame);
    }
  return 0;
}

void
init_frame_pc ()
{
  abort ();
}

/* 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.  */

void
z8k_frame_init_saved_regs (frame_info)
     struct frame_info *frame_info;
{
  CORE_ADDR pc;
  int w;

  frame_saved_regs_zalloc (frame_info);
  pc = get_pc_function_start (frame_info->pc);

  /* wander down the instruction stream */
  examine_frame (pc, frame_info->saved_regs, frame_info->frame);

}

void
z8k_push_dummy_frame ()
{
  abort ();
}

int
gdb_print_insn_z8k (memaddr, info)
     bfd_vma memaddr;
     disassemble_info *info;
{
  if (BIG)
    return print_insn_z8001 (memaddr, info);
  else
    return print_insn_z8002 (memaddr, info);
}

/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
   is not the address of a valid instruction, the address of the next
   instruction beyond ADDR otherwise.  *PWORD1 receives the first word
   of the instruction. */

CORE_ADDR
NEXT_PROLOGUE_INSN (addr, lim, pword1)
     CORE_ADDR addr;
     CORE_ADDR lim;
     short *pword1;
{
  char buf[2];
  if (addr < lim + 8)
    {
      read_memory (addr, buf, 2);
      *pword1 = extract_signed_integer (buf, 2);

      return addr + 2;
    }
  return 0;
}

#if 0
/* 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.

   We cache the result of doing this in the frame_cache_obstack, since
   it is fairly expensive.  */

void
frame_find_saved_regs (fip, fsrp)
     struct frame_info *fip;
     struct frame_saved_regs *fsrp;
{
  int locals;
  CORE_ADDR pc;
  CORE_ADDR adr;
  int i;

  memset (fsrp, 0, sizeof *fsrp);

  pc = skip_adjust (get_pc_function_start (fip->pc), &locals);

  {
    adr = FRAME_FP (fip) - locals;
    for (i = 0; i < 8; i++)
      {
	int word = read_memory_short (pc);

	pc += 2;
	if (IS_PUSHL (word))
	  {
	    fsrp->regs[word & 0xf] = adr;
	    fsrp->regs[(word & 0xf) + 1] = adr - 2;
	    adr -= 4;
	  }
	else if (IS_PUSHW (word))
	  {
	    fsrp->regs[word & 0xf] = adr;
	    adr -= 2;
	  }
	else
	  break;
      }

  }

  fsrp->regs[PC_REGNUM] = fip->frame + 4;
  fsrp->regs[FP_REGNUM] = fip->frame;

}
#endif

int
z8k_saved_pc_after_call (struct frame_info *frame)
{
  return ADDR_BITS_REMOVE
    (read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
}


void
extract_return_value (type, regbuf, valbuf)
     struct type *type;
     char *regbuf;
     char *valbuf;
{
  int b;
  int len = TYPE_LENGTH (type);

  for (b = 0; b < len; b += 2)
    {
      int todo = len - b;

      if (todo > 2)
	todo = 2;
      memcpy (valbuf + b, regbuf + b, todo);
    }
}

void
write_return_value (type, valbuf)
     struct type *type;
     char *valbuf;
{
  int reg;
  int len;

  for (len = 0; len < TYPE_LENGTH (type); len += 2)
    write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2);
}

void
store_struct_return (addr, sp)
     CORE_ADDR addr;
     CORE_ADDR sp;
{
  write_register (2, addr);
}


void
z8k_print_register_hook (regno)
     int regno;
{
  if ((regno & 1) == 0 && regno < 16)
    {
      unsigned short l[2];

      read_relative_register_raw_bytes (regno, (char *) (l + 0));
      read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
      printf_unfiltered ("\t");
      printf_unfiltered ("%04x%04x", l[0], l[1]);
    }

  if ((regno & 3) == 0 && regno < 16)
    {
      unsigned short l[4];

      read_relative_register_raw_bytes (regno, (char *) (l + 0));
      read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
      read_relative_register_raw_bytes (regno + 2, (char *) (l + 2));
      read_relative_register_raw_bytes (regno + 3, (char *) (l + 3));

      printf_unfiltered ("\t");
      printf_unfiltered ("%04x%04x%04x%04x", l[0], l[1], l[2], l[3]);
    }
  if (regno == 15)
    {
      unsigned short rval;
      int i;

      read_relative_register_raw_bytes (regno, (char *) (&rval));

      printf_unfiltered ("\n");
      for (i = 0; i < 10; i += 2)
	{
	  printf_unfiltered ("(sp+%d=%04x)", i,
			     (unsigned int)read_memory_short (rval + i));
	}
    }

}

void
z8k_pop_frame ()
{
}

struct cmd_list_element *setmemorylist;

void
z8k_set_pointer_size (newsize)
     int newsize;
{
  static int oldsize = 0;

  if (oldsize != newsize)
    {
      printf_unfiltered ("pointer size set to %d bits\n", newsize);
      oldsize = newsize;
      if (newsize == 32)
	{
	  BIG = 1;
	}
      else
	{
	  BIG = 0;
	}
      /* FIXME: This code should be using the GDBARCH framework to
         handle changed type sizes.  If this problem is ever fixed
         (the direct reference to _initialize_gdbtypes() below
         eliminated) then Makefile.in should be updated so that
         z8k-tdep.c is again compiled with -Werror. */
      _initialize_gdbtypes ();
    }
}

static void
segmented_command (args, from_tty)
     char *args;
     int from_tty;
{
  z8k_set_pointer_size (32);
}

static void
unsegmented_command (args, from_tty)
     char *args;
     int from_tty;
{
  z8k_set_pointer_size (16);
}

static void
set_memory (args, from_tty)
     char *args;
     int from_tty;
{
  printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n");
  help_list (setmemorylist, "set memory ", -1, gdb_stdout);
}

void
_initialize_z8ktdep ()
{
  tm_print_insn = gdb_print_insn_z8k;

  add_prefix_cmd ("memory", no_class, set_memory,
		  "set the memory model", &setmemorylist, "set memory ", 0,
		  &setlist);
  add_cmd ("segmented", class_support, segmented_command,
	   "Set segmented memory model.", &setmemorylist);
  add_cmd ("unsegmented", class_support, unsegmented_command,
	   "Set unsegmented memory model.", &setmemorylist);

}
Commit	Line	Data
c906108c SS	1	/* Target-machine dependent code for Zilog Z8000, for GDB.
	2	Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
	3
c5aa993b	4	This file is part of GDB.
c906108c	5
c5aa993b JM	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.
c906108c	10
c5aa993b JM	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.
c906108c	15
c5aa993b JM	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,
	19	Boston, MA 02111-1307, USA. */
c906108c SS	20
c906108c SS	21	/*
c5aa993b JM	22	Contributed by Steve Chamberlain
c5aa993b JM	23	sac@cygnus.com
c906108c SS	24	*/
	25
	26	#include "defs.h"
	27	#include "frame.h"
	28	#include "obstack.h"
	29	#include "symtab.h"
	30	#include "gdbcmd.h"
	31	#include "gdbtypes.h"
	32	#include "dis-asm.h"
	33	#include "gdbcore.h"
	34
d4f3574e SS	35	#include "value.h" /* For read_register() */
	36
	37
	38	static int read_memory_pointer (CORE_ADDR x);
c906108c SS	39
	40	/* Return the saved PC from this frame.
	41
	42	If the frame has a memory copy of SRP_REGNUM, use that. If not,
	43	just use the register SRP_REGNUM itself. */
	44
	45	CORE_ADDR
d4f3574e	46	z8k_frame_saved_pc (frame)
c906108c SS	47	struct frame_info *frame;
	48	{
	49	return read_memory_pointer (frame->frame + (BIG ? 4 : 2));
	50	}
	51
	52	#define IS_PUSHL(x) (BIG ? ((x & 0xfff0) == 0x91e0):((x & 0xfff0) == 0x91F0))
	53	#define IS_PUSHW(x) (BIG ? ((x & 0xfff0) == 0x93e0):((x & 0xfff0)==0x93f0))
	54	#define IS_MOVE_FP(x) (BIG ? x == 0xa1ea : x == 0xa1fa)
	55	#define IS_MOV_SP_FP(x) (BIG ? x == 0x94ea : x == 0x0d76)
	56	#define IS_SUB2_SP(x) (x==0x1b87)
	57	#define IS_MOVK_R5(x) (x==0x7905)
	58	#define IS_SUB_SP(x) ((x & 0xffff) == 0x020f)
	59	#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa))
	60
	61	/* work out how much local space is on the stack and
	62	return the pc pointing to the first push */
	63
	64	static CORE_ADDR
	65	skip_adjust (pc, size)
	66	CORE_ADDR pc;
	67	int *size;
	68	{
	69	*size = 0;
	70
	71	if (IS_PUSH_FP (read_memory_short (pc))
	72	&& IS_MOV_SP_FP (read_memory_short (pc + 2)))
	73	{
	74	/* This is a function with an explict frame pointer */
	75	pc += 4;
	76	size += 2; / remember the frame pointer */
	77	}
	78
	79	/* remember any stack adjustment */
	80	if (IS_SUB_SP (read_memory_short (pc)))
	81	{
	82	*size += read_memory_short (pc + 2);
	83	pc += 4;
	84	}
	85	return pc;
	86	}
	87
c5aa993b	88	static CORE_ADDR examine_frame PARAMS ((CORE_ADDR, CORE_ADDR * regs, CORE_ADDR));
c906108c SS	89	static CORE_ADDR
	90	examine_frame (pc, regs, sp)
	91	CORE_ADDR pc;
	92	CORE_ADDR *regs;
	93	CORE_ADDR sp;
	94	{
	95	int w = read_memory_short (pc);
	96	int offset = 0;
	97	int regno;
	98
	99	for (regno = 0; regno < NUM_REGS; regno++)
	100	regs[regno] = 0;
	101
	102	while (IS_PUSHW (w) \|\| IS_PUSHL (w))
	103	{
	104	/* work out which register is being pushed to where */
	105	if (IS_PUSHL (w))
	106	{
	107	regs[w & 0xf] = offset;
	108	regs[(w & 0xf) + 1] = offset + 2;
	109	offset += 4;
	110	}
	111	else
	112	{
	113	regs[w & 0xf] = offset;
	114	offset += 2;
	115	}
	116	pc += 2;
	117	w = read_memory_short (pc);
	118	}
	119
	120	if (IS_MOVE_FP (w))
	121	{
	122	/* We know the fp */
	123
	124	}
	125	else if (IS_SUB_SP (w))
	126	{
	127	/* Subtracting a value from the sp, so were in a function
c5aa993b JM	128	which needs stack space for locals, but has no fp. We fake up
c5aa993b JM	129	the values as if we had an fp */
c906108c SS	130	regs[FP_REGNUM] = sp;
	131	}
	132	else
	133	{
	134	/* This one didn't have an fp, we'll fake it up */
	135	regs[SP_REGNUM] = sp;
	136	}
	137	/* stack pointer contains address of next frame */
c5aa993b	138	/* regs[fp_regnum()] = fp; */
c906108c SS	139	regs[SP_REGNUM] = sp;
	140	return pc;
	141	}
	142
	143	CORE_ADDR
	144	z8k_skip_prologue (start_pc)
	145	CORE_ADDR start_pc;
	146	{
	147	CORE_ADDR dummy[NUM_REGS];
	148
	149	return examine_frame (start_pc, dummy, 0);
	150	}
	151
	152	CORE_ADDR
	153	z8k_addr_bits_remove (addr)
	154	CORE_ADDR addr;
	155	{
	156	return (addr & PTR_MASK);
	157	}
	158
d4f3574e SS	159	static int
d4f3574e SS	160	read_memory_pointer (CORE_ADDR x)
c906108c SS	161	{
	162	return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2);
	163	}
	164
	165	CORE_ADDR
d4f3574e	166	z8k_frame_chain (thisframe)
c906108c SS	167	struct frame_info *thisframe;
	168	{
	169	if (thisframe->prev == 0)
	170	{
	171	/* This is the top of the stack, let's get the sp for real */
	172	}
	173	if (!inside_entry_file (thisframe->pc))
	174	{
	175	return read_memory_pointer (thisframe->frame);
	176	}
	177	return 0;
	178	}
	179
	180	void
	181	init_frame_pc ()
	182	{
	183	abort ();
	184	}
	185
	186	/* Put here the code to store, into a struct frame_saved_regs,
	187	the addresses of the saved registers of frame described by FRAME_INFO.
	188	This includes special registers such as pc and fp saved in special
	189	ways in the stack frame. sp is even more special:
	190	the address we return for it IS the sp for the next frame. */
	191
	192	void
	193	z8k_frame_init_saved_regs (frame_info)
	194	struct frame_info *frame_info;
	195	{
	196	CORE_ADDR pc;
	197	int w;
	198
	199	frame_saved_regs_zalloc (frame_info);
	200	pc = get_pc_function_start (frame_info->pc);
	201
	202	/* wander down the instruction stream */
	203	examine_frame (pc, frame_info->saved_regs, frame_info->frame);
	204
	205	}
	206
	207	void
	208	z8k_push_dummy_frame ()
	209	{
	210	abort ();
	211	}
	212
	213	int
	214	gdb_print_insn_z8k (memaddr, info)
	215	bfd_vma memaddr;
	216	disassemble_info *info;
	217	{
	218	if (BIG)
	219	return print_insn_z8001 (memaddr, info);
	220	else
	221	return print_insn_z8002 (memaddr, info);
	222	}
	223
	224	/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
	225	is not the address of a valid instruction, the address of the next
	226	instruction beyond ADDR otherwise. *PWORD1 receives the first word
c5aa993b	227	of the instruction. */
c906108c SS	228
	229	CORE_ADDR
	230	NEXT_PROLOGUE_INSN (addr, lim, pword1)
	231	CORE_ADDR addr;
	232	CORE_ADDR lim;
	233	short *pword1;
	234	{
	235	char buf[2];
	236	if (addr < lim + 8)
	237	{
	238	read_memory (addr, buf, 2);
	239	*pword1 = extract_signed_integer (buf, 2);
	240
	241	return addr + 2;
	242	}
	243	return 0;
	244	}
	245
	246	#if 0
	247	/* Put here the code to store, into a struct frame_saved_regs,
	248	the addresses of the saved registers of frame described by FRAME_INFO.
	249	This includes special registers such as pc and fp saved in special
	250	ways in the stack frame. sp is even more special:
	251	the address we return for it IS the sp for the next frame.
	252
	253	We cache the result of doing this in the frame_cache_obstack, since
	254	it is fairly expensive. */
	255
	256	void
	257	frame_find_saved_regs (fip, fsrp)
	258	struct frame_info *fip;
	259	struct frame_saved_regs *fsrp;
	260	{
	261	int locals;
	262	CORE_ADDR pc;
	263	CORE_ADDR adr;
	264	int i;
	265
	266	memset (fsrp, 0, sizeof *fsrp);
	267
	268	pc = skip_adjust (get_pc_function_start (fip->pc), &locals);
	269
	270	{
	271	adr = FRAME_FP (fip) - locals;
	272	for (i = 0; i < 8; i++)
	273	{
	274	int word = read_memory_short (pc);
	275
	276	pc += 2;
	277	if (IS_PUSHL (word))
	278	{
	279	fsrp->regs[word & 0xf] = adr;
	280	fsrp->regs[(word & 0xf) + 1] = adr - 2;
	281	adr -= 4;
	282	}
	283	else if (IS_PUSHW (word))
	284	{
	285	fsrp->regs[word & 0xf] = adr;
	286	adr -= 2;
	287	}
	288	else
	289	break;
	290	}
	291
292	}
293
294	fsrp->regs[PC_REGNUM] = fip->frame + 4;
295	fsrp->regs[FP_REGNUM] = fip->frame;
296
297	}
298	#endif
299
300	int
d4f3574e	301	z8k_saved_pc_after_call (struct frame_info *frame)
c906108c	302	{
c5aa993b	303	return ADDR_BITS_REMOVE
c906108c SS	304	(read_memory_integer (read_register (SP_REGNUM), PTR_SIZE));
	305	}
	306
	307
	308	void
	309	extract_return_value (type, regbuf, valbuf)
	310	struct type *type;
	311	char *regbuf;
	312	char *valbuf;
	313	{
	314	int b;
	315	int len = TYPE_LENGTH (type);
	316
	317	for (b = 0; b < len; b += 2)
	318	{
	319	int todo = len - b;
	320
	321	if (todo > 2)
	322	todo = 2;
	323	memcpy (valbuf + b, regbuf + b, todo);
	324	}
	325	}
	326
	327	void
	328	write_return_value (type, valbuf)
	329	struct type *type;
	330	char *valbuf;
	331	{
	332	int reg;
	333	int len;
	334
	335	for (len = 0; len < TYPE_LENGTH (type); len += 2)
c5aa993b	336	write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2);
c906108c SS	337	}
	338
	339	void
	340	store_struct_return (addr, sp)
	341	CORE_ADDR addr;
	342	CORE_ADDR sp;
	343	{
	344	write_register (2, addr);
	345	}
	346
	347
	348	void
d4f3574e	349	z8k_print_register_hook (regno)
c906108c SS	350	int regno;
	351	{
	352	if ((regno & 1) == 0 && regno < 16)
	353	{
	354	unsigned short l[2];
	355
	356	read_relative_register_raw_bytes (regno, (char *) (l + 0));
	357	read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
	358	printf_unfiltered ("\t");
	359	printf_unfiltered ("%04x%04x", l[0], l[1]);
	360	}
	361
	362	if ((regno & 3) == 0 && regno < 16)
	363	{
	364	unsigned short l[4];
	365
	366	read_relative_register_raw_bytes (regno, (char *) (l + 0));
	367	read_relative_register_raw_bytes (regno + 1, (char *) (l + 1));
	368	read_relative_register_raw_bytes (regno + 2, (char *) (l + 2));
	369	read_relative_register_raw_bytes (regno + 3, (char *) (l + 3));
	370
	371	printf_unfiltered ("\t");
	372	printf_unfiltered ("%04x%04x%04x%04x", l[0], l[1], l[2], l[3]);
	373	}
	374	if (regno == 15)
	375	{
	376	unsigned short rval;
	377	int i;
	378
	379	read_relative_register_raw_bytes (regno, (char *) (&rval));
	380
	381	printf_unfiltered ("\n");
	382	for (i = 0; i < 10; i += 2)
	383	{
d4f3574e SS	384	printf_unfiltered ("(sp+%d=%04x)", i,
d4f3574e SS	385	(unsigned int)read_memory_short (rval + i));
c906108c SS	386	}
	387	}
	388
	389	}
	390
	391	void
	392	z8k_pop_frame ()
	393	{
	394	}
	395
	396	struct cmd_list_element *setmemorylist;
	397
	398	void
	399	z8k_set_pointer_size (newsize)
	400	int newsize;
	401	{
	402	static int oldsize = 0;
	403
	404	if (oldsize != newsize)
	405	{
	406	printf_unfiltered ("pointer size set to %d bits\n", newsize);
	407	oldsize = newsize;
	408	if (newsize == 32)
	409	{
	410	BIG = 1;
	411	}
	412	else
	413	{
	414	BIG = 0;
	415	}
d4f3574e SS	416	/* FIXME: This code should be using the GDBARCH framework to
	417	handle changed type sizes. If this problem is ever fixed
	418	(the direct reference to _initialize_gdbtypes() below
	419	eliminated) then Makefile.in should be updated so that
	420	z8k-tdep.c is again compiled with -Werror. */
c906108c SS	421	_initialize_gdbtypes ();
	422	}
	423	}
	424
	425	static void
	426	segmented_command (args, from_tty)
	427	char *args;
	428	int from_tty;
	429	{
	430	z8k_set_pointer_size (32);
	431	}
	432
	433	static void
	434	unsegmented_command (args, from_tty)
	435	char *args;
	436	int from_tty;
	437	{
	438	z8k_set_pointer_size (16);
	439	}
	440
	441	static void
	442	set_memory (args, from_tty)
	443	char *args;
	444	int from_tty;
	445	{
	446	printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n");
	447	help_list (setmemorylist, "set memory ", -1, gdb_stdout);
	448	}
	449
	450	void
	451	_initialize_z8ktdep ()
	452	{
	453	tm_print_insn = gdb_print_insn_z8k;
	454
	455	add_prefix_cmd ("memory", no_class, set_memory,
	456	"set the memory model", &setmemorylist, "set memory ", 0,
	457	&setlist);
	458	add_cmd ("segmented", class_support, segmented_command,
	459	"Set segmented memory model.", &setmemorylist);
	460	add_cmd ("unsegmented", class_support, unsegmented_command,
	461	"Set unsegmented memory model.", &setmemorylist);
	462
	463	}