[binutils.git] / gdb / sparc-xdep.c

/* Machine-dependent code which would otherwise be in inflow.c and core.c,
   for GDB, the GNU debugger, for SPARC host systems.

   Copyright (C) 1986, 1987, 1989, 1990  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.  */

#include <stdio.h>
#include "defs.h"
#include "tm-sparc.h"
#include "param-no-tm.h"
#include "inferior.h"
#include "target.h"

#include <sys/param.h>
#include <sys/file.h>		/* For L_SET */

#include <sys/ptrace.h>
#include <machine/reg.h>

#include "gdbcore.h"
#include <sys/core.h>

extern char register_valid[];

/* We don't store all registers immediately when requested, since they
   get sent over in large chunks anyway.  Instead, we accumulate most
   of the changes and send them over once.  "deferred_stores" keeps
   track of which sets of registers we have locally-changed copies of,
   so we only need send the groups that have changed.  */

#define	INT_REGS	1
#define	STACK_REGS	2
#define	FP_REGS		4

int deferred_stores = 0;	/* Cumulates stores we want to do eventually. */

/* Fetch one or more registers from the inferior.  REGNO == -1 to get
   them all.  We actually fetch more than requested, when convenient,
   marking them as valid so we won't fetch them again.  */
void
fetch_inferior_registers (regno)
     int regno;
{
  struct regs inferior_registers;
  struct fp_status inferior_fp_registers;
  int i;

  /* We should never be called with deferred stores, because a prerequisite
     for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh.  */
  if (deferred_stores) abort();

  DO_DEFERRED_STORES;

  /* Global and Out regs are fetched directly, as well as the control
     registers.  If we're getting one of the in or local regs,
     and the stack pointer has not yet been fetched,
     we have to do that first, since they're found in memory relative
     to the stack pointer.  */
  if (regno < O7_REGNUM  /* including -1 */
      || regno >= Y_REGNUM
      || (!register_valid[SP_REGNUM] && regno < I7_REGNUM))
    {
      if (0 != ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers))
	    perror("ptrace_getregs");
      
      registers[REGISTER_BYTE (0)] = 0;
      bcopy (&inferior_registers.r_g1, &registers[REGISTER_BYTE (1)], 15 * REGISTER_RAW_SIZE (G0_REGNUM));
      *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps; 
      *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
      *(int *)&registers[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc;
      *(int *)&registers[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y;

      for (i = G0_REGNUM; i <= O7_REGNUM; i++)
	register_valid[i] = 1;
      register_valid[Y_REGNUM] = 1;
      register_valid[PS_REGNUM] = 1;
      register_valid[PC_REGNUM] = 1;
      register_valid[NPC_REGNUM] = 1;
      /* If we don't set these valid, read_register_bytes() rereads
	 all the regs every time it is called!  FIXME.  */
      register_valid[WIM_REGNUM] = 1;	/* Not true yet, FIXME */
      register_valid[TBR_REGNUM] = 1;	/* Not true yet, FIXME */
      register_valid[FPS_REGNUM] = 1;	/* Not true yet, FIXME */
      register_valid[CPS_REGNUM] = 1;	/* Not true yet, FIXME */
    }

  /* Floating point registers */
  if (regno == -1 || (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31))
    {
      if (0 != ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers))
	    perror("ptrace_getfpregs");
      bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
	     sizeof inferior_fp_registers.fpu_fr);
      /* bcopy (&inferior_fp_registers.Fpu_fsr,
	     &registers[REGISTER_BYTE (FPS_REGNUM)],
	     sizeof (FPU_FSR_TYPE));  FIXME???  -- gnu@cyg */
      for (i = FP0_REGNUM; i <= FP0_REGNUM+31; i++)
	register_valid[i] = 1;
      register_valid[FPS_REGNUM] = 1;
    }

  /* These regs are saved on the stack by the kernel.  Only read them
     all (16 ptrace calls!) if we really need them.  */
  if (regno == -1)
    {
      target_xfer_memory (*(CORE_ADDR*)&registers[REGISTER_BYTE (SP_REGNUM)],
		          &registers[REGISTER_BYTE (L0_REGNUM)],
			  16*REGISTER_RAW_SIZE (L0_REGNUM), 0);
      for (i = L0_REGNUM; i <= I7_REGNUM; i++)
	register_valid[i] = 1;
    }
  else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
    {
      CORE_ADDR sp = *(CORE_ADDR*)&registers[REGISTER_BYTE (SP_REGNUM)];
      i = REGISTER_BYTE (regno);
      if (register_valid[regno])
	printf("register %d valid and read\n", regno);
      target_xfer_memory (sp + i - REGISTER_BYTE (L0_REGNUM),
			  &registers[i], REGISTER_RAW_SIZE (regno), 0);
      register_valid[regno] = 1;
    }
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

int
store_inferior_registers (regno)
     int regno;
{
  struct regs inferior_registers;
  struct fp_status inferior_fp_registers;
  int wanna_store = INT_REGS + STACK_REGS + FP_REGS;

  /* First decide which pieces of machine-state we need to modify.  
     Default for regno == -1 case is all pieces.  */
  if (regno >= 0)
    if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32)
      {
	wanna_store = FP_REGS;
      }
    else 
      {
	if (regno == SP_REGNUM)
	  wanna_store = INT_REGS + STACK_REGS;
	else if (regno < L0_REGNUM || regno > I7_REGNUM)
	  wanna_store = INT_REGS;
	else
	  wanna_store = STACK_REGS;
      }

  /* See if we're forcing the stores to happen now, or deferring. */
  if (regno == -2)
    {
      wanna_store = deferred_stores;
      deferred_stores = 0;
    }
  else
    {
      if (wanna_store == STACK_REGS)
	{
	  /* Fall through and just store one stack reg.  If we deferred
	     it, we'd have to store them all, or remember more info.  */
	}
      else
	{
	  deferred_stores |= wanna_store;
	  return 0;
	}
    }

  if (wanna_store & STACK_REGS)
    {
      CORE_ADDR sp = *(CORE_ADDR *)&registers[REGISTER_BYTE (SP_REGNUM)];

      if (regno < 0 || regno == SP_REGNUM)
	{
	  if (!register_valid[L0_REGNUM+5]) abort();
	  target_xfer_memory (sp, 
			      &registers[REGISTER_BYTE (L0_REGNUM)],
			      16*REGISTER_RAW_SIZE (L0_REGNUM), 1);
	}
      else
	{
	  if (!register_valid[regno]) abort();
	  target_xfer_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM),
			      &registers[REGISTER_BYTE (regno)],
			      REGISTER_RAW_SIZE (regno), 1);
	}
	
    }

  if (wanna_store & INT_REGS)
    {
      if (!register_valid[G1_REGNUM]) abort();

      bcopy (&registers[REGISTER_BYTE (G1_REGNUM)],
	     &inferior_registers.r_g1, 15 * REGISTER_RAW_SIZE (G1_REGNUM));

      inferior_registers.r_ps =
	*(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
      inferior_registers.r_pc =
	*(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
      inferior_registers.r_npc =
	*(int *)&registers[REGISTER_BYTE (NPC_REGNUM)];
      inferior_registers.r_y =
	*(int *)&registers[REGISTER_BYTE (Y_REGNUM)];

      if (0 != ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers))
	perror("ptrace_setregs");
    }

  if (wanna_store & FP_REGS)
    {
      if (!register_valid[FP0_REGNUM+9]) abort();
      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
	     &inferior_fp_registers,
	     sizeof inferior_fp_registers.fpu_fr);

/*      bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
	     &inferior_fp_registers.Fpu_fsr,
	     sizeof (FPU_FSR_TYPE));
****/
      if (0 !=
	 ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers))
	 perror("ptrace_setfpregs");
    }
    return 0;
}
\f
void
fetch_core_registers (core_reg_sect, core_reg_size, which)
  char *core_reg_sect;
  unsigned core_reg_size;
  int which;
{

  if (which == 0) {

    /* Integer registers */

#define gregs ((struct regs *)core_reg_sect)
    /* G0 *always* holds 0.  */
    *(int *)&registers[REGISTER_BYTE (0)] = 0;

    /* The globals and output registers.  */
    bcopy (&gregs->r_g1, 
	   &registers[REGISTER_BYTE (G1_REGNUM)],
	   15 * REGISTER_RAW_SIZE (G1_REGNUM));
    *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps;
    *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc;
    *(int *)&registers[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc;
    *(int *)&registers[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y;

    /* My best guess at where to get the locals and input
       registers is exactly where they usually are, right above
       the stack pointer.  If the core dump was caused by a bus error
       from blowing away the stack pointer (as is possible) then this
       won't work, but it's worth the try. */
    {
      int sp;

      sp = *(int *)&registers[REGISTER_BYTE (SP_REGNUM)];
      if (0 != target_read_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)], 
			  16 * REGISTER_RAW_SIZE (L0_REGNUM)))
	{
	  /* fprintf so user can still use gdb */
	  fprintf (stderr,
		   "Couldn't read input and local registers from core file\n");
	}
    }
  } else if (which == 2) {

    /* Floating point registers */

#define fpuregs  ((struct fpu *) core_reg_sect)
    if (core_reg_size >= sizeof (struct fpu))
      {
	bcopy (fpuregs->fpu_regs,
	       &registers[REGISTER_BYTE (FP0_REGNUM)],
	       sizeof (fpuregs->fpu_regs));
	bcopy (&fpuregs->fpu_fsr,
	       &registers[REGISTER_BYTE (FPS_REGNUM)],
	       sizeof (FPU_FSR_TYPE));
      }
    else
      fprintf (stderr, "Couldn't read float regs from core file\n");
  }
}
Commit	Line	Data
dd3b648e RP	1	/* Machine-dependent code which would otherwise be in inflow.c and core.c,
	2	for GDB, the GNU debugger, for SPARC host systems.
	3
	4	Copyright (C) 1986, 1987, 1989, 1990 Free Software Foundation, Inc.
	5
	6	This file is part of GDB.
	7
99a7de40	8	This program is free software; you can redistribute it and/or modify
dd3b648e	9	it under the terms of the GNU General Public License as published by
99a7de40 JG	10	the Free Software Foundation; either version 2 of the License, or
99a7de40 JG	11	(at your option) any later version.
dd3b648e	12
99a7de40	13	This program is distributed in the hope that it will be useful,
dd3b648e RP	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
99a7de40 JG	19	along with this program; if not, write to the Free Software
99a7de40 JG	20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
dd3b648e RP	21
	22	#include <stdio.h>
	23	#include "defs.h"
	24	#include "tm-sparc.h"
	25	#include "param-no-tm.h"
	26	#include "inferior.h"
	27	#include "target.h"
	28
	29	#include <sys/param.h>
	30	#include <sys/file.h> /* For L_SET */
	31
	32	#include <sys/ptrace.h>
	33	#include <machine/reg.h>
	34
	35	#include "gdbcore.h"
	36	#include <sys/core.h>
	37
	38	extern char register_valid[];
	39
69f29a86 JG	40	/* We don't store all registers immediately when requested, since they
	41	get sent over in large chunks anyway. Instead, we accumulate most
	42	of the changes and send them over once. "deferred_stores" keeps
	43	track of which sets of registers we have locally-changed copies of,
	44	so we only need send the groups that have changed. */
	45
	46	#define INT_REGS 1
	47	#define STACK_REGS 2
	48	#define FP_REGS 4
	49
beff312e RP	50	int deferred_stores = 0; /* Cumulates stores we want to do eventually. */
beff312e RP	51
dd3b648e RP	52	/* Fetch one or more registers from the inferior. REGNO == -1 to get
	53	them all. We actually fetch more than requested, when convenient,
	54	marking them as valid so we won't fetch them again. */
	55	void
	56	fetch_inferior_registers (regno)
	57	int regno;
	58	{
	59	struct regs inferior_registers;
	60	struct fp_status inferior_fp_registers;
	61	int i;
	62
	63	/* We should never be called with deferred stores, because a prerequisite
	64	for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */
	65	if (deferred_stores) abort();
	66
	67	DO_DEFERRED_STORES;
	68
	69	/* Global and Out regs are fetched directly, as well as the control
	70	registers. If we're getting one of the in or local regs,
	71	and the stack pointer has not yet been fetched,
	72	we have to do that first, since they're found in memory relative
	73	to the stack pointer. */
	74	if (regno < O7_REGNUM /* including -1 */
	75	\|\| regno >= Y_REGNUM
	76	\|\| (!register_valid[SP_REGNUM] && regno < I7_REGNUM))
	77	{
	78	if (0 != ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers))
	79	perror("ptrace_getregs");
	80
	81	registers[REGISTER_BYTE (0)] = 0;
	82	bcopy (&inferior_registers.r_g1, &registers[REGISTER_BYTE (1)], 15 * REGISTER_RAW_SIZE (G0_REGNUM));
	83	(int )&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
	84	(int )&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
	85	(int )&registers[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc;
	86	(int )&registers[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y;
	87
	88	for (i = G0_REGNUM; i <= O7_REGNUM; i++)
	89	register_valid[i] = 1;
	90	register_valid[Y_REGNUM] = 1;
	91	register_valid[PS_REGNUM] = 1;
	92	register_valid[PC_REGNUM] = 1;
	93	register_valid[NPC_REGNUM] = 1;
	94	/* If we don't set these valid, read_register_bytes() rereads
	95	all the regs every time it is called! FIXME. */
	96	register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */
	97	register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */
	98	register_valid[FPS_REGNUM] = 1; /* Not true yet, FIXME */
	99	register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */
	100	}
	101
	102	/* Floating point registers */
	103	if (regno == -1 \|\| (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31))
	104	{
	105	if (0 != ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers))
	106	perror("ptrace_getfpregs");
	107	bcopy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
	108	sizeof inferior_fp_registers.fpu_fr);
	109	/* bcopy (&inferior_fp_registers.Fpu_fsr,
	110	&registers[REGISTER_BYTE (FPS_REGNUM)],
	111	sizeof (FPU_FSR_TYPE)); FIXME??? -- gnu@cyg */
	112	for (i = FP0_REGNUM; i <= FP0_REGNUM+31; i++)
	113	register_valid[i] = 1;
	114	register_valid[FPS_REGNUM] = 1;
	115	}
116
117	/* These regs are saved on the stack by the kernel. Only read them
118	all (16 ptrace calls!) if we really need them. */
119	if (regno == -1)
120	{
121	target_xfer_memory ((CORE_ADDR)&registers[REGISTER_BYTE (SP_REGNUM)],
122	&registers[REGISTER_BYTE (L0_REGNUM)],
123	16*REGISTER_RAW_SIZE (L0_REGNUM), 0);
124	for (i = L0_REGNUM; i <= I7_REGNUM; i++)
125	register_valid[i] = 1;
126	}
127	else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
128	{
129	CORE_ADDR sp = (CORE_ADDR)&registers[REGISTER_BYTE (SP_REGNUM)];
130	i = REGISTER_BYTE (regno);
131	if (register_valid[regno])
132	printf("register %d valid and read\n", regno);
133	target_xfer_memory (sp + i - REGISTER_BYTE (L0_REGNUM),
134	&registers[i], REGISTER_RAW_SIZE (regno), 0);
135	register_valid[regno] = 1;
136	}
137	}
138
139	/* Store our register values back into the inferior.
140	If REGNO is -1, do this for all registers.
141	Otherwise, REGNO specifies which register (so we can save time). */
142
dd3b648e RP	143	int
	144	store_inferior_registers (regno)
	145	int regno;
	146	{
	147	struct regs inferior_registers;
	148	struct fp_status inferior_fp_registers;
	149	int wanna_store = INT_REGS + STACK_REGS + FP_REGS;
	150
	151	/* First decide which pieces of machine-state we need to modify.
	152	Default for regno == -1 case is all pieces. */
	153	if (regno >= 0)
	154	if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32)
	155	{
	156	wanna_store = FP_REGS;
	157	}
	158	else
	159	{
	160	if (regno == SP_REGNUM)
	161	wanna_store = INT_REGS + STACK_REGS;
	162	else if (regno < L0_REGNUM \|\| regno > I7_REGNUM)
	163	wanna_store = INT_REGS;
	164	else
	165	wanna_store = STACK_REGS;
	166	}
	167
	168	/* See if we're forcing the stores to happen now, or deferring. */
	169	if (regno == -2)
	170	{
	171	wanna_store = deferred_stores;
	172	deferred_stores = 0;
	173	}
	174	else
	175	{
	176	if (wanna_store == STACK_REGS)
	177	{
	178	/* Fall through and just store one stack reg. If we deferred
	179	it, we'd have to store them all, or remember more info. */
	180	}
	181	else
	182	{
	183	deferred_stores \|= wanna_store;
	184	return 0;
	185	}
	186	}
	187
	188	if (wanna_store & STACK_REGS)
	189	{
	190	CORE_ADDR sp = (CORE_ADDR )&registers[REGISTER_BYTE (SP_REGNUM)];
	191
	192	if (regno < 0 \|\| regno == SP_REGNUM)
	193	{
	194	if (!register_valid[L0_REGNUM+5]) abort();
	195	target_xfer_memory (sp,
	196	&registers[REGISTER_BYTE (L0_REGNUM)],
	197	16*REGISTER_RAW_SIZE (L0_REGNUM), 1);
	198	}
	199	else
	200	{
	201	if (!register_valid[regno]) abort();
	202	target_xfer_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM),
	203	&registers[REGISTER_BYTE (regno)],
	204	REGISTER_RAW_SIZE (regno), 1);
	205	}
	206
207	}
208
209	if (wanna_store & INT_REGS)
210	{
211	if (!register_valid[G1_REGNUM]) abort();
212
213	bcopy (&registers[REGISTER_BYTE (G1_REGNUM)],
214	&inferior_registers.r_g1, 15 * REGISTER_RAW_SIZE (G1_REGNUM));
215
216	inferior_registers.r_ps =
217	(int )&registers[REGISTER_BYTE (PS_REGNUM)];
218	inferior_registers.r_pc =
219	(int )&registers[REGISTER_BYTE (PC_REGNUM)];
220	inferior_registers.r_npc =
221	(int )&registers[REGISTER_BYTE (NPC_REGNUM)];
222	inferior_registers.r_y =
223	(int )&registers[REGISTER_BYTE (Y_REGNUM)];
224
225	if (0 != ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers))
226	perror("ptrace_setregs");
227	}
228
229	if (wanna_store & FP_REGS)
230	{
231	if (!register_valid[FP0_REGNUM+9]) abort();
232	bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
233	&inferior_fp_registers,
234	sizeof inferior_fp_registers.fpu_fr);
235
236	/* bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
237	&inferior_fp_registers.Fpu_fsr,
238	sizeof (FPU_FSR_TYPE));
239	****/
240	if (0 !=
241	ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers))
242	perror("ptrace_setfpregs");
243	}
244	return 0;
245	}
246	\f
247	void
248	fetch_core_registers (core_reg_sect, core_reg_size, which)
249	char *core_reg_sect;
250	unsigned core_reg_size;
251	int which;
252	{
253
254	if (which == 0) {
255
256	/* Integer registers */
257
258	#define gregs ((struct regs *)core_reg_sect)
259	/* G0 always holds 0. */
260	(int )&registers[REGISTER_BYTE (0)] = 0;
261
262	/* The globals and output registers. */
263	bcopy (&gregs->r_g1,
264	&registers[REGISTER_BYTE (G1_REGNUM)],
265	15 * REGISTER_RAW_SIZE (G1_REGNUM));
266	(int )&registers[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps;
267	(int )&registers[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc;
268	(int )&registers[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc;
269	(int )&registers[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y;
270
271	/* My best guess at where to get the locals and input
272	registers is exactly where they usually are, right above
273	the stack pointer. If the core dump was caused by a bus error
274	from blowing away the stack pointer (as is possible) then this
275	won't work, but it's worth the try. */
276	{
277	int sp;
278
279	sp = (int )&registers[REGISTER_BYTE (SP_REGNUM)];
280	if (0 != target_read_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
281	16 * REGISTER_RAW_SIZE (L0_REGNUM)))
282	{
283	/* fprintf so user can still use gdb */
284	fprintf (stderr,
285	"Couldn't read input and local registers from core file\n");
286	}
287	}
288	} else if (which == 2) {
289
290	/* Floating point registers */
291
292	#define fpuregs ((struct fpu *) core_reg_sect)
293	if (core_reg_size >= sizeof (struct fpu))
294	{
295	bcopy (fpuregs->fpu_regs,
296	&registers[REGISTER_BYTE (FP0_REGNUM)],
297	sizeof (fpuregs->fpu_regs));
298	bcopy (&fpuregs->fpu_fsr,
299	&registers[REGISTER_BYTE (FPS_REGNUM)],
300	sizeof (FPU_FSR_TYPE));
301	}
302	else
303	fprintf (stderr, "Couldn't read float regs from core file\n");
304	}
305	}