[binutils.git] / gdb / ultra3-nat.c

/* Native-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
   Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
   Contributed by David Wood ([email protected]) at New York University.

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.  */

#define DEBUG
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "value.h"

#include <sys/types.h>
#include <sys/param.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>  

#include "gdbcore.h"

#include <sys/file.h>
#include "gdb_stat.h"

static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));

/* Assumes support for AMD's Binary Compatibility Standard
   for ptrace().  If you define ULTRA3, the ultra3 extensions to
   ptrace() are used allowing the reading of more than one register
   at a time. 

   This file assumes KERNEL_DEBUGGING is turned off.  This means
   that if the user/gdb tries to read gr64-gr95 or any of the 
   protected special registers we silently return -1 (see the
   CANNOT_STORE/FETCH_REGISTER macros).  */
#define	ULTRA3

#if !defined (offsetof)
# define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#endif

extern int errno;
struct ptrace_user pt_struct;

/* Get all available registers from the inferior.  Registers that are
 * defined in REGISTER_NAMES, but not available to the user/gdb are
 * supplied as -1.  This may include gr64-gr95 and the protected special
 * purpose registers.
 */

void
fetch_inferior_registers (regno)
  int regno;
{
  register int i,j,ret_val=0;
  char buf[128];

  if (regno != -1) {
    fetch_register (regno);
    return;
  }

/* Global Registers */
#ifdef ULTRA3
  errno = 0;
  ptrace (PT_READ_STRUCT, inferior_pid,
	  (PTRACE_ARG3_TYPE) register_addr(GR96_REGNUM,0), 
	  (int)&pt_struct.pt_gr[0], 32*4);
  if (errno != 0) {
      perror_with_name ("reading global registers");
      ret_val = -1;
  } else for (regno=GR96_REGNUM, j=0 ; j<32 ; regno++, j++)  {
      supply_register (regno, &pt_struct.pt_gr[j]);
  }
#else
  for (regno=GR96_REGNUM ; !ret_val && regno < GR96_REGNUM+32 ; regno++)
    fetch_register(regno);
#endif

/* Local Registers */
#ifdef ULTRA3
  errno = 0;
  ptrace (PT_READ_STRUCT, inferior_pid,
	  (PTRACE_ARG3_TYPE) register_addr(LR0_REGNUM,0), 
	  (int)&pt_struct.pt_lr[0], 128*4);
  if (errno != 0) {
      perror_with_name ("reading local registers");
      ret_val = -1;
  } else for (regno=LR0_REGNUM, j=0 ; j<128 ; regno++, j++)  {
      supply_register (regno, &pt_struct.pt_lr[j]);
  }
#else
  for (regno=LR0_REGNUM ; !ret_val && regno < LR0_REGNUM+128 ; regno++)
    fetch_register(regno);
#endif

/* Special Registers */
  fetch_register(GR1_REGNUM);
  fetch_register(CPS_REGNUM);
  fetch_register(PC_REGNUM);
  fetch_register(NPC_REGNUM);
  fetch_register(PC2_REGNUM);
  fetch_register(IPC_REGNUM);
  fetch_register(IPA_REGNUM);
  fetch_register(IPB_REGNUM);
  fetch_register(Q_REGNUM);
  fetch_register(BP_REGNUM);
  fetch_register(FC_REGNUM);

/* Fake any registers that are in REGISTER_NAMES, but not available to gdb */ 
  registers_fetched();
}

/* 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).  
 * NOTE: Assumes AMD's binary compatibility standard. 
 */

void
store_inferior_registers (regno)
     int regno;
{
  register unsigned int regaddr;
  char buf[80];

  if (regno >= 0)
    {
      if (CANNOT_STORE_REGISTER(regno)) 
	return;
      regaddr = register_addr (regno, 0);
      errno = 0;
      ptrace (PT_WRITE_U, inferior_pid,
	      (PTRACE_ARG3_TYPE) regaddr, read_register(regno));
      if (errno != 0)
	{
	  sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
	  perror_with_name (buf);
	}
    }
  else
    {
#ifdef ULTRA3
      pt_struct.pt_gr1 = read_register(GR1_REGNUM);
      for (regno = GR96_REGNUM; regno < GR96_REGNUM+32; regno++)
	pt_struct.pt_gr[regno] = read_register(regno);
      for (regno = LR0_REGNUM; regno < LR0_REGNUM+128; regno++)
	pt_struct.pt_gr[regno] = read_register(regno);
      errno = 0;
      ptrace (PT_WRITE_STRUCT, inferior_pid,
	      (PTRACE_ARG3_TYPE) register_addr(GR1_REGNUM,0), 
	      (int)&pt_struct.pt_gr1,(1*32*128)*4);
      if (errno != 0)
	{
	   sprintf (buf, "writing all local/global registers");
	   perror_with_name (buf);
	}
      pt_struct.pt_psr = read_register(CPS_REGNUM);
      pt_struct.pt_pc0 = read_register(NPC_REGNUM);
      pt_struct.pt_pc1 = read_register(PC_REGNUM);
      pt_struct.pt_pc2 = read_register(PC2_REGNUM);
      pt_struct.pt_ipc = read_register(IPC_REGNUM);
      pt_struct.pt_ipa = read_register(IPA_REGNUM);
      pt_struct.pt_ipb = read_register(IPB_REGNUM);
      pt_struct.pt_q   = read_register(Q_REGNUM);
      pt_struct.pt_bp  = read_register(BP_REGNUM);
      pt_struct.pt_fc  = read_register(FC_REGNUM);
      errno = 0;
      ptrace (PT_WRITE_STRUCT, inferior_pid,
	      (PTRACE_ARG3_TYPE) register_addr(CPS_REGNUM,0), 
	      (int)&pt_struct.pt_psr,(10)*4);
      if (errno != 0)
	{
	   sprintf (buf, "writing all special registers");
	   perror_with_name (buf);
	   return;
	}
#else
      store_inferior_registers(GR1_REGNUM);
      for (regno=GR96_REGNUM ; regno<GR96_REGNUM+32 ; regno++)
	store_inferior_registers(regno);
      for (regno=LR0_REGNUM ; regno<LR0_REGNUM+128 ; regno++)
	store_inferior_registers(regno);
      store_inferior_registers(CPS_REGNUM);
      store_inferior_registers(PC_REGNUM);
      store_inferior_registers(NPC_REGNUM);
      store_inferior_registers(PC2_REGNUM);
      store_inferior_registers(IPC_REGNUM);
      store_inferior_registers(IPA_REGNUM);
      store_inferior_registers(IPB_REGNUM);
      store_inferior_registers(Q_REGNUM);
      store_inferior_registers(BP_REGNUM);
      store_inferior_registers(FC_REGNUM);
#endif	/* ULTRA3 */
    }
}

/* 
 * Fetch an individual register (and supply it).
 * return 0 on success, -1 on failure.
 * NOTE: Assumes AMD's Binary Compatibility Standard for ptrace().
 */
static void
fetch_register (regno)
     int regno;
{
  char buf[128];
  int	val;

  if (CANNOT_FETCH_REGISTER(regno)) {
    val = -1;
    supply_register (regno, &val);
  } else {
    errno = 0;
    val = ptrace (PT_READ_U, inferior_pid,
		  (PTRACE_ARG3_TYPE) register_addr(regno,0), 0);
    if (errno != 0) {
      sprintf(buf,"reading register %s (#%d)",REGISTER_NAME (regno), regno);
      perror_with_name (buf);
    } else {
      supply_register (regno, &val);
    }
  }
}


/* 
 * Read AMD's Binary Compatibilty Standard conforming core file.
 * struct ptrace_user is the first thing in the core file
 */

static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
     char *core_reg_sect;	/* Unused in this version */
     unsigned core_reg_size;	/* Unused in this version */
     int which;			/* Unused in this version */
     CORE_ADDR reg_addr;	/* Unused in this version */
{
  register int regno;
  int	val;
  char	buf[4];

  for (regno = 0 ; regno < NUM_REGS; regno++) {
    if (!CANNOT_FETCH_REGISTER(regno)) {
      val = bfd_seek (core_bfd, (file_ptr) register_addr (regno, 0), SEEK_SET);
      if (val < 0 || (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0) {
        char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) + 35);
        strcpy (buffer, "Reading core register ");
        strcat (buffer, REGISTER_NAME (regno));
        perror_with_name (buffer);
      }
      supply_register (regno, buf);
    }
  }

  /* Fake any registers that are in REGISTER_NAMES, but not available to gdb */ 
  registers_fetched();
}


/*  
 * Takes a register number as defined in tm.h via REGISTER_NAMES, and maps
 * it to an offset in a struct ptrace_user defined by AMD's BCS.
 * That is, it defines the mapping between gdb register numbers and items in
 * a struct ptrace_user.
 * A register protection scheme is set up here.  If a register not
 * available to the user is specified in 'regno', then an address that
 * will cause ptrace() to fail is returned.
 */
CORE_ADDR
register_addr (regno,blockend)
     int	regno;
     CORE_ADDR	blockend;
{
  if ((regno >= LR0_REGNUM) && (regno < LR0_REGNUM + 128)) {
    return(offsetof(struct ptrace_user,pt_lr[regno-LR0_REGNUM]));
  } else if ((regno >= GR96_REGNUM) && (regno < GR96_REGNUM + 32)) {
    return(offsetof(struct ptrace_user,pt_gr[regno-GR96_REGNUM]));
  } else {
    switch (regno) {
	case GR1_REGNUM: return(offsetof(struct ptrace_user,pt_gr1));
	case CPS_REGNUM: return(offsetof(struct ptrace_user,pt_psr));
	case NPC_REGNUM: return(offsetof(struct ptrace_user,pt_pc0));
	case PC_REGNUM:  return(offsetof(struct ptrace_user,pt_pc1));
	case PC2_REGNUM: return(offsetof(struct ptrace_user,pt_pc2));
	case IPC_REGNUM: return(offsetof(struct ptrace_user,pt_ipc));
	case IPA_REGNUM: return(offsetof(struct ptrace_user,pt_ipa));
	case IPB_REGNUM: return(offsetof(struct ptrace_user,pt_ipb));
	case Q_REGNUM:   return(offsetof(struct ptrace_user,pt_q));
	case BP_REGNUM:  return(offsetof(struct ptrace_user,pt_bp));
	case FC_REGNUM:  return(offsetof(struct ptrace_user,pt_fc));
	default:
	     fprintf_filtered(gdb_stderr,"register_addr():Bad register %s (%d)\n", 
			      REGISTER_NAME (regno), regno);
	     return(0xffffffff);	/* Should make ptrace() fail */
    }
  }
}

\f
/* Register that we are able to handle ultra3 core file formats.
   FIXME: is this really bfd_target_unknown_flavour? */

static struct core_fns ultra3_core_fns =
{
  bfd_target_unknown_flavour,
  fetch_core_registers,
  NULL
};

void
_initialize_core_ultra3 ()
{
  add_core_fns (&ultra3_core_fns);
}
Commit	Line	Data
c906108c SS	1	/* Native-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
	2	Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
	3	Contributed by David Wood ([email protected]) at New York University.
	4
	5	This file is part of GDB.
	6
	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.
	11
	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.
	16
	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, Boston, MA 02111-1307, USA. */
	20
	21	#define DEBUG
	22	#include "defs.h"
	23	#include "frame.h"
	24	#include "inferior.h"
	25	#include "symtab.h"
	26	#include "value.h"
	27
	28	#include <sys/types.h>
	29	#include <sys/param.h>
	30	#include <signal.h>
	31	#include <sys/ioctl.h>
	32	#include <fcntl.h>
	33
	34	#include "gdbcore.h"
	35
	36	#include <sys/file.h>
	37	#include "gdb_stat.h"
	38
	39	static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
	40
	41	/* Assumes support for AMD's Binary Compatibility Standard
	42	for ptrace(). If you define ULTRA3, the ultra3 extensions to
	43	ptrace() are used allowing the reading of more than one register
	44	at a time.
	45
	46	This file assumes KERNEL_DEBUGGING is turned off. This means
	47	that if the user/gdb tries to read gr64-gr95 or any of the
	48	protected special registers we silently return -1 (see the
	49	CANNOT_STORE/FETCH_REGISTER macros). */
	50	#define ULTRA3
	51
	52	#if !defined (offsetof)
	53	# define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
	54	#endif
	55
	56	extern int errno;
	57	struct ptrace_user pt_struct;
	58
	59	/* Get all available registers from the inferior. Registers that are
	60	* defined in REGISTER_NAMES, but not available to the user/gdb are
	61	* supplied as -1. This may include gr64-gr95 and the protected special
	62	* purpose registers.
	63	*/
	64
65	void
66	fetch_inferior_registers (regno)
67	int regno;
68	{
69	register int i,j,ret_val=0;
70	char buf[128];
71
72	if (regno != -1) {
73	fetch_register (regno);
74	return;
75	}
76
77	/* Global Registers */
78	#ifdef ULTRA3
79	errno = 0;
80	ptrace (PT_READ_STRUCT, inferior_pid,
81	(PTRACE_ARG3_TYPE) register_addr(GR96_REGNUM,0),
82	(int)&pt_struct.pt_gr[0], 32*4);
83	if (errno != 0) {
84	perror_with_name ("reading global registers");
85	ret_val = -1;
86	} else for (regno=GR96_REGNUM, j=0 ; j<32 ; regno++, j++) {
87	supply_register (regno, &pt_struct.pt_gr[j]);
88	}
89	#else
90	for (regno=GR96_REGNUM ; !ret_val && regno < GR96_REGNUM+32 ; regno++)
91	fetch_register(regno);
92	#endif
93
94	/* Local Registers */
95	#ifdef ULTRA3
96	errno = 0;
97	ptrace (PT_READ_STRUCT, inferior_pid,
98	(PTRACE_ARG3_TYPE) register_addr(LR0_REGNUM,0),
99	(int)&pt_struct.pt_lr[0], 128*4);
100	if (errno != 0) {
101	perror_with_name ("reading local registers");
102	ret_val = -1;
103	} else for (regno=LR0_REGNUM, j=0 ; j<128 ; regno++, j++) {
104	supply_register (regno, &pt_struct.pt_lr[j]);
105	}
106	#else
107	for (regno=LR0_REGNUM ; !ret_val && regno < LR0_REGNUM+128 ; regno++)
108	fetch_register(regno);
109	#endif
110
111	/* Special Registers */
112	fetch_register(GR1_REGNUM);
113	fetch_register(CPS_REGNUM);
114	fetch_register(PC_REGNUM);
115	fetch_register(NPC_REGNUM);
116	fetch_register(PC2_REGNUM);
117	fetch_register(IPC_REGNUM);
118	fetch_register(IPA_REGNUM);
119	fetch_register(IPB_REGNUM);
120	fetch_register(Q_REGNUM);
121	fetch_register(BP_REGNUM);
122	fetch_register(FC_REGNUM);
123
124	/* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
125	registers_fetched();
126	}
127
128	/* Store our register values back into the inferior.
129	* If REGNO is -1, do this for all registers.
130	* Otherwise, REGNO specifies which register (so we can save time).
131	* NOTE: Assumes AMD's binary compatibility standard.
132	*/
133
134	void
135	store_inferior_registers (regno)
136	int regno;
137	{
138	register unsigned int regaddr;
139	char buf[80];
140
141	if (regno >= 0)
142	{
143	if (CANNOT_STORE_REGISTER(regno))
144	return;
145	regaddr = register_addr (regno, 0);
146	errno = 0;
147	ptrace (PT_WRITE_U, inferior_pid,
148	(PTRACE_ARG3_TYPE) regaddr, read_register(regno));
149	if (errno != 0)
150	{
151	sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
152	perror_with_name (buf);
153	}
154	}
155	else
156	{
157	#ifdef ULTRA3
158	pt_struct.pt_gr1 = read_register(GR1_REGNUM);
159	for (regno = GR96_REGNUM; regno < GR96_REGNUM+32; regno++)
160	pt_struct.pt_gr[regno] = read_register(regno);
161	for (regno = LR0_REGNUM; regno < LR0_REGNUM+128; regno++)
162	pt_struct.pt_gr[regno] = read_register(regno);
163	errno = 0;
164	ptrace (PT_WRITE_STRUCT, inferior_pid,
165	(PTRACE_ARG3_TYPE) register_addr(GR1_REGNUM,0),
166	(int)&pt_struct.pt_gr1,(132128)*4);
167	if (errno != 0)
168	{
169	sprintf (buf, "writing all local/global registers");
170	perror_with_name (buf);
171	}
172	pt_struct.pt_psr = read_register(CPS_REGNUM);
173	pt_struct.pt_pc0 = read_register(NPC_REGNUM);
174	pt_struct.pt_pc1 = read_register(PC_REGNUM);
175	pt_struct.pt_pc2 = read_register(PC2_REGNUM);
176	pt_struct.pt_ipc = read_register(IPC_REGNUM);
177	pt_struct.pt_ipa = read_register(IPA_REGNUM);
178	pt_struct.pt_ipb = read_register(IPB_REGNUM);
179	pt_struct.pt_q = read_register(Q_REGNUM);
180	pt_struct.pt_bp = read_register(BP_REGNUM);
181	pt_struct.pt_fc = read_register(FC_REGNUM);
182	errno = 0;
183	ptrace (PT_WRITE_STRUCT, inferior_pid,
184	(PTRACE_ARG3_TYPE) register_addr(CPS_REGNUM,0),
185	(int)&pt_struct.pt_psr,(10)*4);
186	if (errno != 0)
187	{
188	sprintf (buf, "writing all special registers");
189	perror_with_name (buf);
190	return;
191	}
192	#else
193	store_inferior_registers(GR1_REGNUM);
194	for (regno=GR96_REGNUM ; regno<GR96_REGNUM+32 ; regno++)
195	store_inferior_registers(regno);
196	for (regno=LR0_REGNUM ; regno<LR0_REGNUM+128 ; regno++)
197	store_inferior_registers(regno);
198	store_inferior_registers(CPS_REGNUM);
199	store_inferior_registers(PC_REGNUM);
200	store_inferior_registers(NPC_REGNUM);
201	store_inferior_registers(PC2_REGNUM);
202	store_inferior_registers(IPC_REGNUM);
203	store_inferior_registers(IPA_REGNUM);
204	store_inferior_registers(IPB_REGNUM);
205	store_inferior_registers(Q_REGNUM);
206	store_inferior_registers(BP_REGNUM);
207	store_inferior_registers(FC_REGNUM);
208	#endif /* ULTRA3 */
209	}
210	}
211
212	/*
213	* Fetch an individual register (and supply it).
214	* return 0 on success, -1 on failure.
215	* NOTE: Assumes AMD's Binary Compatibility Standard for ptrace().
216	*/
217	static void
218	fetch_register (regno)
219	int regno;
220	{
221	char buf[128];
222	int val;
223
224	if (CANNOT_FETCH_REGISTER(regno)) {
225	val = -1;
226	supply_register (regno, &val);
227	} else {
228	errno = 0;
229	val = ptrace (PT_READ_U, inferior_pid,
230	(PTRACE_ARG3_TYPE) register_addr(regno,0), 0);
231	if (errno != 0) {
232	sprintf(buf,"reading register %s (#%d)",REGISTER_NAME (regno), regno);
233	perror_with_name (buf);
234	} else {
235	supply_register (regno, &val);
236	}
237	}
238	}
239
240
241	/*
242	* Read AMD's Binary Compatibilty Standard conforming core file.
243	* struct ptrace_user is the first thing in the core file
244	*/
245
246	static void
247	fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
248	char core_reg_sect; / Unused in this version */
249	unsigned core_reg_size; /* Unused in this version */
250	int which; /* Unused in this version */
251	CORE_ADDR reg_addr; /* Unused in this version */
252	{
253	register int regno;
254	int val;
255	char buf[4];
256
257	for (regno = 0 ; regno < NUM_REGS; regno++) {
258	if (!CANNOT_FETCH_REGISTER(regno)) {
259	val = bfd_seek (core_bfd, (file_ptr) register_addr (regno, 0), SEEK_SET);
260	if (val < 0 \|\| (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0) {
261	char * buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) + 35);
262	strcpy (buffer, "Reading core register ");
263	strcat (buffer, REGISTER_NAME (regno));
264	perror_with_name (buffer);
265	}
266	supply_register (regno, buf);
267	}
268	}
269
270	/* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
271	registers_fetched();
272	}
273
274
275	/*
276	* Takes a register number as defined in tm.h via REGISTER_NAMES, and maps
277	* it to an offset in a struct ptrace_user defined by AMD's BCS.
278	* That is, it defines the mapping between gdb register numbers and items in
279	* a struct ptrace_user.
280	* A register protection scheme is set up here. If a register not
281	* available to the user is specified in 'regno', then an address that
282	* will cause ptrace() to fail is returned.
283	*/
284	CORE_ADDR
285	register_addr (regno,blockend)
286	int regno;
287	CORE_ADDR blockend;
288	{
289	if ((regno >= LR0_REGNUM) && (regno < LR0_REGNUM + 128)) {
290	return(offsetof(struct ptrace_user,pt_lr[regno-LR0_REGNUM]));
291	} else if ((regno >= GR96_REGNUM) && (regno < GR96_REGNUM + 32)) {
292	return(offsetof(struct ptrace_user,pt_gr[regno-GR96_REGNUM]));
293	} else {
294	switch (regno) {
295	case GR1_REGNUM: return(offsetof(struct ptrace_user,pt_gr1));
296	case CPS_REGNUM: return(offsetof(struct ptrace_user,pt_psr));
297	case NPC_REGNUM: return(offsetof(struct ptrace_user,pt_pc0));
298	case PC_REGNUM: return(offsetof(struct ptrace_user,pt_pc1));
299	case PC2_REGNUM: return(offsetof(struct ptrace_user,pt_pc2));
300	case IPC_REGNUM: return(offsetof(struct ptrace_user,pt_ipc));
301	case IPA_REGNUM: return(offsetof(struct ptrace_user,pt_ipa));
302	case IPB_REGNUM: return(offsetof(struct ptrace_user,pt_ipb));
303	case Q_REGNUM: return(offsetof(struct ptrace_user,pt_q));
304	case BP_REGNUM: return(offsetof(struct ptrace_user,pt_bp));
305	case FC_REGNUM: return(offsetof(struct ptrace_user,pt_fc));
306	default:
307	fprintf_filtered(gdb_stderr,"register_addr():Bad register %s (%d)\n",
308	REGISTER_NAME (regno), regno);
309	return(0xffffffff); /* Should make ptrace() fail */
310	}
311	}
312	}
313
314	\f
315	/* Register that we are able to handle ultra3 core file formats.
316	FIXME: is this really bfd_target_unknown_flavour? */
317
318	static struct core_fns ultra3_core_fns =
319	{
320	bfd_target_unknown_flavour,
321	fetch_core_registers,
322	NULL
323	};
324
325	void
326	_initialize_core_ultra3 ()
327	{
328	add_core_fns (&ultra3_core_fns);
329	}