[deliverable/binutils-gdb.git] / gdb / gdbserver / regcache.c

/* Register support routines for the remote server for GDB.
   Copyright (C) 2001-2016 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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "server.h"
#include "regdef.h"
#include "gdbthread.h"
#include "tdesc.h"
#include "rsp-low.h"
#ifndef IN_PROCESS_AGENT

struct regcache *
get_thread_regcache (struct thread_info *thread, int fetch)
{
  struct regcache *regcache;

  regcache = inferior_regcache_data (thread);

  /* Threads' regcaches are created lazily, because biarch targets add
     the main thread/lwp before seeing it stop for the first time, and
     it is only after the target sees the thread stop for the first
     time that the target has a chance of determining the process's
     architecture.  IOW, when we first add the process's main thread
     we don't know which architecture/tdesc its regcache should
     have.  */
  if (regcache == NULL)
    {
      struct process_info *proc = get_thread_process (thread);

      gdb_assert (proc->tdesc != NULL);

      regcache = new_register_cache (proc->tdesc);
      set_inferior_regcache_data (thread, regcache);
    }

  if (fetch && regcache->registers_valid == 0)
    {
      struct thread_info *saved_thread = current_thread;

      current_thread = thread;
      /* Invalidate all registers, to prevent stale left-overs.  */
      memset (regcache->register_status, REG_UNAVAILABLE,
	      regcache->tdesc->num_registers);
      fetch_inferior_registers (regcache, -1);
      current_thread = saved_thread;
      regcache->registers_valid = 1;
    }

  return regcache;
}

/* See common/common-regcache.h.  */

struct regcache *
get_thread_regcache_for_ptid (ptid_t ptid)
{
  return get_thread_regcache (find_thread_ptid (ptid), 1);
}

void
regcache_invalidate_thread (struct thread_info *thread)
{
  struct regcache *regcache;

  regcache = inferior_regcache_data (thread);

  if (regcache == NULL)
    return;

  if (regcache->registers_valid)
    {
      struct thread_info *saved_thread = current_thread;

      current_thread = thread;
      store_inferior_registers (regcache, -1);
      current_thread = saved_thread;
    }

  regcache->registers_valid = 0;
}

static int
regcache_invalidate_one (struct inferior_list_entry *entry,
			 void *pid_p)
{
  struct thread_info *thread = (struct thread_info *) entry;
  int pid = *(int *) pid_p;

  /* Only invalidate the regcaches of threads of this process.  */
  if (ptid_get_pid (entry->id) == pid)
    regcache_invalidate_thread (thread);

  return 0;
}

/* See regcache.h.  */

void
regcache_invalidate_pid (int pid)
{
  find_inferior (&all_threads, regcache_invalidate_one, &pid);
}

/* See regcache.h.  */

void
regcache_invalidate (void)
{
  /* Only update the threads of the current process.  */
  int pid = ptid_get_pid (current_thread->entry.id);

  regcache_invalidate_pid (pid);
}

#endif

struct regcache *
init_register_cache (struct regcache *regcache,
		     const struct target_desc *tdesc,
		     unsigned char *regbuf)
{
  if (regbuf == NULL)
    {
#ifndef IN_PROCESS_AGENT
      /* Make sure to zero-initialize the register cache when it is
	 created, in case there are registers the target never
	 fetches.  This way they'll read as zero instead of
	 garbage.  */
      regcache->tdesc = tdesc;
      regcache->registers
	= (unsigned char *) xcalloc (1, tdesc->registers_size);
      regcache->registers_owned = 1;
      regcache->register_status
	= (unsigned char *) xmalloc (tdesc->num_registers);
      memset ((void *) regcache->register_status, REG_UNAVAILABLE,
	      tdesc->num_registers);
#else
      gdb_assert_not_reached ("can't allocate memory from the heap");
#endif
    }
  else
    {
      regcache->tdesc = tdesc;
      regcache->registers = regbuf;
      regcache->registers_owned = 0;
#ifndef IN_PROCESS_AGENT
      regcache->register_status = NULL;
#endif
    }

  regcache->registers_valid = 0;

  return regcache;
}

#ifndef IN_PROCESS_AGENT

struct regcache *
new_register_cache (const struct target_desc *tdesc)
{
  struct regcache *regcache = XCNEW (struct regcache);

  gdb_assert (tdesc->registers_size != 0);

  return init_register_cache (regcache, tdesc, NULL);
}

void
free_register_cache (struct regcache *regcache)
{
  if (regcache)
    {
      if (regcache->registers_owned)
	free (regcache->registers);
      free (regcache->register_status);
      free (regcache);
    }
}

#endif

void
regcache_cpy (struct regcache *dst, struct regcache *src)
{
  gdb_assert (src != NULL && dst != NULL);
  gdb_assert (src->tdesc == dst->tdesc);
  gdb_assert (src != dst);

  memcpy (dst->registers, src->registers, src->tdesc->registers_size);
#ifndef IN_PROCESS_AGENT
  if (dst->register_status != NULL && src->register_status != NULL)
    memcpy (dst->register_status, src->register_status,
	    src->tdesc->num_registers);
#endif
  dst->registers_valid = src->registers_valid;
}


#ifndef IN_PROCESS_AGENT

void
registers_to_string (struct regcache *regcache, char *buf)
{
  unsigned char *registers = regcache->registers;
  const struct target_desc *tdesc = regcache->tdesc;
  int i;

  for (i = 0; i < tdesc->num_registers; i++)
    {
      if (regcache->register_status[i] == REG_VALID)
	{
	  bin2hex (registers, buf, register_size (tdesc, i));
	  buf += register_size (tdesc, i) * 2;
	}
      else
	{
	  memset (buf, 'x', register_size (tdesc, i) * 2);
	  buf += register_size (tdesc, i) * 2;
	}
      registers += register_size (tdesc, i);
    }
  *buf = '\0';
}

void
registers_from_string (struct regcache *regcache, char *buf)
{
  int len = strlen (buf);
  unsigned char *registers = regcache->registers;
  const struct target_desc *tdesc = regcache->tdesc;

  if (len != tdesc->registers_size * 2)
    {
      warning ("Wrong sized register packet (expected %d bytes, got %d)",
	       2 * tdesc->registers_size, len);
      if (len > tdesc->registers_size * 2)
	len = tdesc->registers_size * 2;
    }
  hex2bin (buf, registers, len / 2);
}

int
find_regno (const struct target_desc *tdesc, const char *name)
{
  int i;

  for (i = 0; i < tdesc->num_registers; i++)
    if (strcmp (name, tdesc->reg_defs[i].name) == 0)
      return i;
  internal_error (__FILE__, __LINE__, "Unknown register %s requested",
		  name);
}

struct reg *
find_register_by_number (const struct target_desc *tdesc, int n)
{
  return &tdesc->reg_defs[n];
}

#endif

#ifndef IN_PROCESS_AGENT
static void
free_register_cache_thread (struct thread_info *thread)
{
  struct regcache *regcache = inferior_regcache_data (thread);

  if (regcache != NULL)
    {
      regcache_invalidate_thread (thread);
      free_register_cache (regcache);
      set_inferior_regcache_data (thread, NULL);
    }
}

static void
free_register_cache_thread_one (struct inferior_list_entry *entry)
{
  struct thread_info *thread = (struct thread_info *) entry;

  free_register_cache_thread (thread);
}

void
regcache_release (void)
{
  /* Flush and release all pre-existing register caches.  */
  for_each_inferior (&all_threads, free_register_cache_thread_one);
}
#endif

int
register_cache_size (const struct target_desc *tdesc)
{
  return tdesc->registers_size;
}

int
register_size (const struct target_desc *tdesc, int n)
{
  return tdesc->reg_defs[n].size / 8;
}

/* See common/common-regcache.h.  */

int
regcache_register_size (const struct regcache *regcache, int n)
{
  return register_size (regcache->tdesc, n);
}

static unsigned char *
register_data (struct regcache *regcache, int n, int fetch)
{
  return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8;
}

/* Supply register N, whose contents are stored in BUF, to REGCACHE.
   If BUF is NULL, the register's value is recorded as
   unavailable.  */

void
supply_register (struct regcache *regcache, int n, const void *buf)
{
  if (buf)
    {
      memcpy (register_data (regcache, n, 0), buf,
	      register_size (regcache->tdesc, n));
#ifndef IN_PROCESS_AGENT
      if (regcache->register_status != NULL)
	regcache->register_status[n] = REG_VALID;
#endif
    }
  else
    {
      memset (register_data (regcache, n, 0), 0,
	      register_size (regcache->tdesc, n));
#ifndef IN_PROCESS_AGENT
      if (regcache->register_status != NULL)
	regcache->register_status[n] = REG_UNAVAILABLE;
#endif
    }
}

/* Supply register N with value zero to REGCACHE.  */

void
supply_register_zeroed (struct regcache *regcache, int n)
{
  memset (register_data (regcache, n, 0), 0,
	  register_size (regcache->tdesc, n));
#ifndef IN_PROCESS_AGENT
  if (regcache->register_status != NULL)
    regcache->register_status[n] = REG_VALID;
#endif
}

/* Supply the whole register set whose contents are stored in BUF, to
   REGCACHE.  If BUF is NULL, all the registers' values are recorded
   as unavailable.  */

void
supply_regblock (struct regcache *regcache, const void *buf)
{
  if (buf)
    {
      const struct target_desc *tdesc = regcache->tdesc;

      memcpy (regcache->registers, buf, tdesc->registers_size);
#ifndef IN_PROCESS_AGENT
      {
	int i;

	for (i = 0; i < tdesc->num_registers; i++)
	  regcache->register_status[i] = REG_VALID;
      }
#endif
    }
  else
    {
      const struct target_desc *tdesc = regcache->tdesc;

      memset (regcache->registers, 0, tdesc->registers_size);
#ifndef IN_PROCESS_AGENT
      {
	int i;

	for (i = 0; i < tdesc->num_registers; i++)
	  regcache->register_status[i] = REG_UNAVAILABLE;
      }
#endif
    }
}

#ifndef IN_PROCESS_AGENT

void
supply_register_by_name (struct regcache *regcache,
			 const char *name, const void *buf)
{
  supply_register (regcache, find_regno (regcache->tdesc, name), buf);
}

#endif

void
collect_register (struct regcache *regcache, int n, void *buf)
{
  memcpy (buf, register_data (regcache, n, 1),
	  register_size (regcache->tdesc, n));
}

enum register_status
regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
			    ULONGEST *val)
{
  int size;

  gdb_assert (regcache != NULL);
  gdb_assert (regnum >= 0 && regnum < regcache->tdesc->num_registers);

  size = register_size (regcache->tdesc, regnum);

  if (size > (int) sizeof (ULONGEST))
    error (_("That operation is not available on integers of more than"
            "%d bytes."),
          (int) sizeof (ULONGEST));

  *val = 0;
  collect_register (regcache, regnum, val);

  return REG_VALID;
}

#ifndef IN_PROCESS_AGENT

void
collect_register_as_string (struct regcache *regcache, int n, char *buf)
{
  bin2hex (register_data (regcache, n, 1), buf,
	   register_size (regcache->tdesc, n));
}

void
collect_register_by_name (struct regcache *regcache,
			  const char *name, void *buf)
{
  collect_register (regcache, find_regno (regcache->tdesc, name), buf);
}

/* Special handling for register PC.  */

CORE_ADDR
regcache_read_pc (struct regcache *regcache)
{
  CORE_ADDR pc_val;

  if (the_target->read_pc)
    pc_val = the_target->read_pc (regcache);
  else
    internal_error (__FILE__, __LINE__,
		    "regcache_read_pc: Unable to find PC");

  return pc_val;
}

void
regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
  if (the_target->write_pc)
    the_target->write_pc (regcache, pc);
  else
    internal_error (__FILE__, __LINE__,
		    "regcache_write_pc: Unable to update PC");
}

#endif
Commit	Line	Data
	1	/* Register support routines for the remote server for GDB.
	2	Copyright (C) 2001-2016 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 3 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, see <http://www.gnu.org/licenses/>. */
	18
	19	#include "server.h"
	20	#include "regdef.h"
	21	#include "gdbthread.h"
	22	#include "tdesc.h"
	23	#include "rsp-low.h"
	24	#ifndef IN_PROCESS_AGENT
	25
	26	struct regcache *
	27	get_thread_regcache (struct thread_info *thread, int fetch)
	28	{
	29	struct regcache *regcache;
	30
	31	regcache = inferior_regcache_data (thread);
	32
	33	/* Threads' regcaches are created lazily, because biarch targets add
	34	the main thread/lwp before seeing it stop for the first time, and
	35	it is only after the target sees the thread stop for the first
	36	time that the target has a chance of determining the process's
	37	architecture. IOW, when we first add the process's main thread
	38	we don't know which architecture/tdesc its regcache should
	39	have. */
	40	if (regcache == NULL)
	41	{
	42	struct process_info *proc = get_thread_process (thread);
	43
	44	gdb_assert (proc->tdesc != NULL);
	45
	46	regcache = new_register_cache (proc->tdesc);
	47	set_inferior_regcache_data (thread, regcache);
	48	}
	49
	50	if (fetch && regcache->registers_valid == 0)
	51	{
	52	struct thread_info *saved_thread = current_thread;
	53
	54	current_thread = thread;
	55	/* Invalidate all registers, to prevent stale left-overs. */
	56	memset (regcache->register_status, REG_UNAVAILABLE,
	57	regcache->tdesc->num_registers);
	58	fetch_inferior_registers (regcache, -1);
	59	current_thread = saved_thread;
	60	regcache->registers_valid = 1;
	61	}
	62
	63	return regcache;
	64	}
	65
	66	/* See common/common-regcache.h. */
	67
	68	struct regcache *
	69	get_thread_regcache_for_ptid (ptid_t ptid)
	70	{
	71	return get_thread_regcache (find_thread_ptid (ptid), 1);
	72	}
	73
	74	void
	75	regcache_invalidate_thread (struct thread_info *thread)
	76	{
	77	struct regcache *regcache;
	78
	79	regcache = inferior_regcache_data (thread);
	80
	81	if (regcache == NULL)
	82	return;
	83
	84	if (regcache->registers_valid)
	85	{
	86	struct thread_info *saved_thread = current_thread;
	87
	88	current_thread = thread;
	89	store_inferior_registers (regcache, -1);
	90	current_thread = saved_thread;
	91	}
	92
	93	regcache->registers_valid = 0;
	94	}
	95
	96	static int
	97	regcache_invalidate_one (struct inferior_list_entry *entry,
	98	void *pid_p)
	99	{
	100	struct thread_info thread = (struct thread_info ) entry;
	101	int pid = (int ) pid_p;
	102
	103	/* Only invalidate the regcaches of threads of this process. */
	104	if (ptid_get_pid (entry->id) == pid)
	105	regcache_invalidate_thread (thread);
	106
	107	return 0;
	108	}
	109
	110	/* See regcache.h. */
	111
	112	void
	113	regcache_invalidate_pid (int pid)
	114	{
	115	find_inferior (&all_threads, regcache_invalidate_one, &pid);
	116	}
	117
	118	/* See regcache.h. */
	119
	120	void
	121	regcache_invalidate (void)
	122	{
	123	/* Only update the threads of the current process. */
	124	int pid = ptid_get_pid (current_thread->entry.id);
	125
	126	regcache_invalidate_pid (pid);
	127	}
	128
	129	#endif
	130
	131	struct regcache *
	132	init_register_cache (struct regcache *regcache,
	133	const struct target_desc *tdesc,
	134	unsigned char *regbuf)
	135	{
	136	if (regbuf == NULL)
	137	{
	138	#ifndef IN_PROCESS_AGENT
	139	/* Make sure to zero-initialize the register cache when it is
	140	created, in case there are registers the target never
	141	fetches. This way they'll read as zero instead of
	142	garbage. */
	143	regcache->tdesc = tdesc;
	144	regcache->registers
	145	= (unsigned char *) xcalloc (1, tdesc->registers_size);
	146	regcache->registers_owned = 1;
	147	regcache->register_status
	148	= (unsigned char *) xmalloc (tdesc->num_registers);
	149	memset ((void *) regcache->register_status, REG_UNAVAILABLE,
	150	tdesc->num_registers);
	151	#else
	152	gdb_assert_not_reached ("can't allocate memory from the heap");
	153	#endif
	154	}
	155	else
	156	{
	157	regcache->tdesc = tdesc;
	158	regcache->registers = regbuf;
	159	regcache->registers_owned = 0;
	160	#ifndef IN_PROCESS_AGENT
	161	regcache->register_status = NULL;
	162	#endif
	163	}
	164
	165	regcache->registers_valid = 0;
	166
	167	return regcache;
	168	}
	169
	170	#ifndef IN_PROCESS_AGENT
	171
	172	struct regcache *
	173	new_register_cache (const struct target_desc *tdesc)
	174	{
	175	struct regcache *regcache = XCNEW (struct regcache);
	176
	177	gdb_assert (tdesc->registers_size != 0);
	178
	179	return init_register_cache (regcache, tdesc, NULL);
	180	}
	181
	182	void
	183	free_register_cache (struct regcache *regcache)
	184	{
	185	if (regcache)
	186	{
	187	if (regcache->registers_owned)
	188	free (regcache->registers);
	189	free (regcache->register_status);
	190	free (regcache);
	191	}
	192	}
	193
	194	#endif
	195
	196	void
	197	regcache_cpy (struct regcache dst, struct regcache src)
	198	{
	199	gdb_assert (src != NULL && dst != NULL);
	200	gdb_assert (src->tdesc == dst->tdesc);
	201	gdb_assert (src != dst);
	202
	203	memcpy (dst->registers, src->registers, src->tdesc->registers_size);
	204	#ifndef IN_PROCESS_AGENT
	205	if (dst->register_status != NULL && src->register_status != NULL)
	206	memcpy (dst->register_status, src->register_status,
	207	src->tdesc->num_registers);
	208	#endif
	209	dst->registers_valid = src->registers_valid;
	210	}
	211
	212
	213	#ifndef IN_PROCESS_AGENT
	214
	215	void
	216	registers_to_string (struct regcache regcache, char buf)
	217	{
	218	unsigned char *registers = regcache->registers;
	219	const struct target_desc *tdesc = regcache->tdesc;
	220	int i;
	221
	222	for (i = 0; i < tdesc->num_registers; i++)
	223	{
	224	if (regcache->register_status[i] == REG_VALID)
	225	{
	226	bin2hex (registers, buf, register_size (tdesc, i));
	227	buf += register_size (tdesc, i) * 2;
	228	}
	229	else
	230	{
	231	memset (buf, 'x', register_size (tdesc, i) * 2);
	232	buf += register_size (tdesc, i) * 2;
	233	}
	234	registers += register_size (tdesc, i);
	235	}
	236	*buf = '\0';
	237	}
	238
	239	void
	240	registers_from_string (struct regcache regcache, char buf)
	241	{
	242	int len = strlen (buf);
	243	unsigned char *registers = regcache->registers;
	244	const struct target_desc *tdesc = regcache->tdesc;
	245
	246	if (len != tdesc->registers_size * 2)
	247	{
	248	warning ("Wrong sized register packet (expected %d bytes, got %d)",
	249	2 * tdesc->registers_size, len);
	250	if (len > tdesc->registers_size * 2)
	251	len = tdesc->registers_size * 2;
	252	}
	253	hex2bin (buf, registers, len / 2);
	254	}
	255
	256	int
	257	find_regno (const struct target_desc tdesc, const char name)
	258	{
	259	int i;
	260
	261	for (i = 0; i < tdesc->num_registers; i++)
	262	if (strcmp (name, tdesc->reg_defs[i].name) == 0)
	263	return i;
	264	internal_error (__FILE__, __LINE__, "Unknown register %s requested",
	265	name);
	266	}
	267
	268	struct reg *
	269	find_register_by_number (const struct target_desc *tdesc, int n)
	270	{
	271	return &tdesc->reg_defs[n];
	272	}
	273
	274	#endif
	275
	276	#ifndef IN_PROCESS_AGENT
	277	static void
	278	free_register_cache_thread (struct thread_info *thread)
	279	{
	280	struct regcache *regcache = inferior_regcache_data (thread);
	281
	282	if (regcache != NULL)
	283	{
	284	regcache_invalidate_thread (thread);
	285	free_register_cache (regcache);
	286	set_inferior_regcache_data (thread, NULL);
	287	}
	288	}
	289
	290	static void
	291	free_register_cache_thread_one (struct inferior_list_entry *entry)
	292	{
	293	struct thread_info thread = (struct thread_info ) entry;
	294
	295	free_register_cache_thread (thread);
	296	}
	297
	298	void
	299	regcache_release (void)
	300	{
	301	/* Flush and release all pre-existing register caches. */
	302	for_each_inferior (&all_threads, free_register_cache_thread_one);
	303	}
	304	#endif
	305
	306	int
	307	register_cache_size (const struct target_desc *tdesc)
	308	{
	309	return tdesc->registers_size;
	310	}
	311
	312	int
	313	register_size (const struct target_desc *tdesc, int n)
	314	{
	315	return tdesc->reg_defs[n].size / 8;
	316	}
	317
	318	/* See common/common-regcache.h. */
	319
	320	int
	321	regcache_register_size (const struct regcache *regcache, int n)
	322	{
	323	return register_size (regcache->tdesc, n);
	324	}
	325
	326	static unsigned char *
	327	register_data (struct regcache *regcache, int n, int fetch)
	328	{
	329	return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8;
	330	}
	331
	332	/* Supply register N, whose contents are stored in BUF, to REGCACHE.
	333	If BUF is NULL, the register's value is recorded as
	334	unavailable. */
	335
	336	void
	337	supply_register (struct regcache regcache, int n, const void buf)
	338	{
	339	if (buf)
	340	{
	341	memcpy (register_data (regcache, n, 0), buf,
	342	register_size (regcache->tdesc, n));
	343	#ifndef IN_PROCESS_AGENT
	344	if (regcache->register_status != NULL)
	345	regcache->register_status[n] = REG_VALID;
	346	#endif
	347	}
	348	else
	349	{
	350	memset (register_data (regcache, n, 0), 0,
	351	register_size (regcache->tdesc, n));
	352	#ifndef IN_PROCESS_AGENT
	353	if (regcache->register_status != NULL)
	354	regcache->register_status[n] = REG_UNAVAILABLE;
	355	#endif
	356	}
	357	}
	358
	359	/* Supply register N with value zero to REGCACHE. */
	360
	361	void
	362	supply_register_zeroed (struct regcache *regcache, int n)
	363	{
	364	memset (register_data (regcache, n, 0), 0,
	365	register_size (regcache->tdesc, n));
	366	#ifndef IN_PROCESS_AGENT
	367	if (regcache->register_status != NULL)
	368	regcache->register_status[n] = REG_VALID;
	369	#endif
	370	}
	371
	372	/* Supply the whole register set whose contents are stored in BUF, to
	373	REGCACHE. If BUF is NULL, all the registers' values are recorded
	374	as unavailable. */
	375
	376	void
	377	supply_regblock (struct regcache regcache, const void buf)
	378	{
	379	if (buf)
	380	{
	381	const struct target_desc *tdesc = regcache->tdesc;
	382
	383	memcpy (regcache->registers, buf, tdesc->registers_size);
	384	#ifndef IN_PROCESS_AGENT
	385	{
	386	int i;
	387
	388	for (i = 0; i < tdesc->num_registers; i++)
	389	regcache->register_status[i] = REG_VALID;
	390	}
	391	#endif
	392	}
	393	else
	394	{
	395	const struct target_desc *tdesc = regcache->tdesc;
	396
	397	memset (regcache->registers, 0, tdesc->registers_size);
	398	#ifndef IN_PROCESS_AGENT
	399	{
	400	int i;
	401
	402	for (i = 0; i < tdesc->num_registers; i++)
	403	regcache->register_status[i] = REG_UNAVAILABLE;
	404	}
	405	#endif
	406	}
	407	}
	408
	409	#ifndef IN_PROCESS_AGENT
	410
	411	void
	412	supply_register_by_name (struct regcache *regcache,
	413	const char name, const void buf)
	414	{
	415	supply_register (regcache, find_regno (regcache->tdesc, name), buf);
	416	}
	417
	418	#endif
	419
	420	void
	421	collect_register (struct regcache regcache, int n, void buf)
	422	{
	423	memcpy (buf, register_data (regcache, n, 1),
	424	register_size (regcache->tdesc, n));
	425	}
	426
	427	enum register_status
	428	regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
	429	ULONGEST *val)
	430	{
	431	int size;
	432
	433	gdb_assert (regcache != NULL);
	434	gdb_assert (regnum >= 0 && regnum < regcache->tdesc->num_registers);
	435
	436	size = register_size (regcache->tdesc, regnum);
	437
	438	if (size > (int) sizeof (ULONGEST))
	439	error (_("That operation is not available on integers of more than"
	440	"%d bytes."),
	441	(int) sizeof (ULONGEST));
	442
	443	*val = 0;
	444	collect_register (regcache, regnum, val);
	445
	446	return REG_VALID;
	447	}
	448
	449	#ifndef IN_PROCESS_AGENT
	450
	451	void
	452	collect_register_as_string (struct regcache regcache, int n, char buf)
	453	{
	454	bin2hex (register_data (regcache, n, 1), buf,
	455	register_size (regcache->tdesc, n));
	456	}
	457
	458	void
	459	collect_register_by_name (struct regcache *regcache,
	460	const char name, void buf)
	461	{
	462	collect_register (regcache, find_regno (regcache->tdesc, name), buf);
	463	}
	464
	465	/* Special handling for register PC. */
	466
	467	CORE_ADDR
	468	regcache_read_pc (struct regcache *regcache)
	469	{
	470	CORE_ADDR pc_val;
	471
	472	if (the_target->read_pc)
	473	pc_val = the_target->read_pc (regcache);
	474	else
	475	internal_error (__FILE__, __LINE__,
	476	"regcache_read_pc: Unable to find PC");
	477
	478	return pc_val;
	479	}
	480
	481	void
	482	regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
	483	{
	484	if (the_target->write_pc)
	485	the_target->write_pc (regcache, pc);
	486	else
	487	internal_error (__FILE__, __LINE__,
	488	"regcache_write_pc: Unable to update PC");
	489	}
	490
	491	#endif