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

/* Register support routines for the remote server for GDB.
   Copyright (C) 2001-2020 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 "gdbsupport/rsp-low.h"
#ifndef IN_PROCESS_AGENT

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

  regcache = thread_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_thread_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->reg_defs.size ());
      fetch_inferior_registers (regcache, -1);
      current_thread = saved_thread;
      regcache->registers_valid = 1;
    }

  return regcache;
}

/* See gdbsupport/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 = thread_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;
}

/* See regcache.h.  */

void
regcache_invalidate_pid (int pid)
{
  /* Only invalidate the regcaches of threads of this process.  */
  for_each_thread (pid, regcache_invalidate_thread);
}

/* See regcache.h.  */

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

  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->reg_defs.size ());
      memset ((void *) regcache->register_status, REG_UNAVAILABLE,
	      tdesc->reg_defs.size ());
#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 = new 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);
      delete 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->reg_defs.size ());
#endif
  dst->registers_valid = src->registers_valid;
}

/* Return a reference to the description of register N.  */

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

#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;

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

static void
free_register_cache_thread (struct thread_info *thread)
{
  struct regcache *regcache = thread_regcache_data (thread);

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

void
regcache_release (void)
{
  /* Flush and release all pre-existing register caches.  */
  for_each_thread (free_register_cache_thread);
}
#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 find_register_by_number (tdesc, n).size / 8;
}

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

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

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

void
supply_register (struct regcache *regcache, int n, const void *buf)
{
  return regcache->raw_supply (n, buf);
}

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

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

#ifndef IN_PROCESS_AGENT

/* Supply register called NAME with value zero to REGCACHE.  */

void
supply_register_by_name_zeroed (struct regcache *regcache,
				const char *name)
{
  supply_register_zeroed (regcache, find_regno (regcache->tdesc, name));
}

#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->reg_defs.size (); 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->reg_defs.size (); 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)
{
  regcache->raw_collect (n, buf);
}

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

void
regcache::raw_collect (int n, void *buf) const
{
  memcpy (buf, register_data (this, n, 1), register_size (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->reg_defs.size ());

  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

/* See regcache.h.  */

ULONGEST
regcache_raw_get_unsigned_by_name (struct regcache *regcache,
				   const char *name)
{
  return regcache_raw_get_unsigned (regcache,
				    find_regno (regcache->tdesc, name));
}

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)
{
  return the_target->read_pc (regcache);
}

void
regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
  the_target->write_pc (regcache, pc);
}

#endif

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

enum register_status
regcache::get_register_status (int regnum) const
{
#ifndef IN_PROCESS_AGENT
  gdb_assert (regnum >= 0 && regnum < tdesc->reg_defs.size ());
  return (enum register_status) (register_status[regnum]);
#else
  return REG_VALID;
#endif
}

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

bool
regcache::raw_compare (int regnum, const void *buf, int offset) const
{
  gdb_assert (buf != NULL);

  const unsigned char *regbuf = register_data (this, regnum, 1);
  int size = register_size (tdesc, regnum);
  gdb_assert (size >= offset);

  return (memcmp (buf, regbuf + offset, size - offset) == 0);
}
Commit	Line	Data
	1	/* Register support routines for the remote server for GDB.
	2	Copyright (C) 2001-2020 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 "gdbsupport/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 = thread_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_thread_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->reg_defs.size ());
	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 gdbsupport/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 = thread_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	/* See regcache.h. */
	97
	98	void
	99	regcache_invalidate_pid (int pid)
	100	{
	101	/* Only invalidate the regcaches of threads of this process. */
	102	for_each_thread (pid, regcache_invalidate_thread);
	103	}
	104
	105	/* See regcache.h. */
	106
	107	void
	108	regcache_invalidate (void)
	109	{
	110	/* Only update the threads of the current process. */
	111	int pid = current_thread->id.pid ();
	112
	113	regcache_invalidate_pid (pid);
	114	}
	115
	116	#endif
	117
	118	struct regcache *
	119	init_register_cache (struct regcache *regcache,
	120	const struct target_desc *tdesc,
	121	unsigned char *regbuf)
	122	{
	123	if (regbuf == NULL)
	124	{
	125	#ifndef IN_PROCESS_AGENT
	126	/* Make sure to zero-initialize the register cache when it is
	127	created, in case there are registers the target never
	128	fetches. This way they'll read as zero instead of
	129	garbage. */
	130	regcache->tdesc = tdesc;
	131	regcache->registers
	132	= (unsigned char *) xcalloc (1, tdesc->registers_size);
	133	regcache->registers_owned = 1;
	134	regcache->register_status
	135	= (unsigned char *) xmalloc (tdesc->reg_defs.size ());
	136	memset ((void *) regcache->register_status, REG_UNAVAILABLE,
	137	tdesc->reg_defs.size ());
	138	#else
	139	gdb_assert_not_reached ("can't allocate memory from the heap");
	140	#endif
	141	}
	142	else
	143	{
	144	regcache->tdesc = tdesc;
	145	regcache->registers = regbuf;
	146	regcache->registers_owned = 0;
	147	#ifndef IN_PROCESS_AGENT
	148	regcache->register_status = NULL;
	149	#endif
	150	}
	151
	152	regcache->registers_valid = 0;
	153
	154	return regcache;
	155	}
	156
	157	#ifndef IN_PROCESS_AGENT
	158
	159	struct regcache *
	160	new_register_cache (const struct target_desc *tdesc)
	161	{
	162	struct regcache *regcache = new struct regcache;
	163
	164	gdb_assert (tdesc->registers_size != 0);
	165
	166	return init_register_cache (regcache, tdesc, NULL);
	167	}
	168
	169	void
	170	free_register_cache (struct regcache *regcache)
	171	{
	172	if (regcache)
	173	{
	174	if (regcache->registers_owned)
	175	free (regcache->registers);
	176	free (regcache->register_status);
	177	delete regcache;
	178	}
	179	}
	180
	181	#endif
	182
	183	void
	184	regcache_cpy (struct regcache dst, struct regcache src)
	185	{
	186	gdb_assert (src != NULL && dst != NULL);
	187	gdb_assert (src->tdesc == dst->tdesc);
	188	gdb_assert (src != dst);
	189
	190	memcpy (dst->registers, src->registers, src->tdesc->registers_size);
	191	#ifndef IN_PROCESS_AGENT
	192	if (dst->register_status != NULL && src->register_status != NULL)
	193	memcpy (dst->register_status, src->register_status,
	194	src->tdesc->reg_defs.size ());
	195	#endif
	196	dst->registers_valid = src->registers_valid;
	197	}
	198
	199	/* Return a reference to the description of register N. */
	200
	201	static const struct gdb::reg &
	202	find_register_by_number (const struct target_desc *tdesc, int n)
	203	{
	204	return tdesc->reg_defs[n];
	205	}
	206
	207	#ifndef IN_PROCESS_AGENT
	208
	209	void
	210	registers_to_string (struct regcache regcache, char buf)
	211	{
	212	unsigned char *registers = regcache->registers;
	213	const struct target_desc *tdesc = regcache->tdesc;
	214
	215	for (int i = 0; i < tdesc->reg_defs.size (); ++i)
	216	{
	217	if (regcache->register_status[i] == REG_VALID)
	218	{
	219	bin2hex (registers, buf, register_size (tdesc, i));
	220	buf += register_size (tdesc, i) * 2;
	221	}
	222	else
	223	{
	224	memset (buf, 'x', register_size (tdesc, i) * 2);
	225	buf += register_size (tdesc, i) * 2;
	226	}
	227	registers += register_size (tdesc, i);
	228	}
	229	*buf = '\0';
	230	}
	231
	232	void
	233	registers_from_string (struct regcache regcache, char buf)
	234	{
	235	int len = strlen (buf);
	236	unsigned char *registers = regcache->registers;
	237	const struct target_desc *tdesc = regcache->tdesc;
	238
	239	if (len != tdesc->registers_size * 2)
	240	{
	241	warning ("Wrong sized register packet (expected %d bytes, got %d)",
	242	2 * tdesc->registers_size, len);
	243	if (len > tdesc->registers_size * 2)
	244	len = tdesc->registers_size * 2;
	245	}
	246	hex2bin (buf, registers, len / 2);
	247	}
	248
	249	int
	250	find_regno (const struct target_desc tdesc, const char name)
	251	{
	252	for (int i = 0; i < tdesc->reg_defs.size (); ++i)
	253	{
	254	if (strcmp (name, find_register_by_number (tdesc, i).name) == 0)
	255	return i;
	256	}
	257	internal_error (__FILE__, __LINE__, "Unknown register %s requested",
	258	name);
	259	}
	260
	261	static void
	262	free_register_cache_thread (struct thread_info *thread)
	263	{
	264	struct regcache *regcache = thread_regcache_data (thread);
	265
	266	if (regcache != NULL)
	267	{
	268	regcache_invalidate_thread (thread);
	269	free_register_cache (regcache);
	270	set_thread_regcache_data (thread, NULL);
	271	}
	272	}
	273
	274	void
	275	regcache_release (void)
	276	{
	277	/* Flush and release all pre-existing register caches. */
	278	for_each_thread (free_register_cache_thread);
	279	}
	280	#endif
	281
	282	int
	283	register_cache_size (const struct target_desc *tdesc)
	284	{
	285	return tdesc->registers_size;
	286	}
	287
	288	int
	289	register_size (const struct target_desc *tdesc, int n)
	290	{
	291	return find_register_by_number (tdesc, n).size / 8;
	292	}
	293
	294	/* See gdbsupport/common-regcache.h. */
	295
	296	int
	297	regcache_register_size (const struct regcache *regcache, int n)
	298	{
	299	return register_size (regcache->tdesc, n);
	300	}
	301
	302	static unsigned char *
	303	register_data (const struct regcache *regcache, int n, int fetch)
	304	{
	305	return (regcache->registers
	306	+ find_register_by_number (regcache->tdesc, n).offset / 8);
	307	}
	308
	309	void
	310	supply_register (struct regcache regcache, int n, const void buf)
	311	{
	312	return regcache->raw_supply (n, buf);
	313	}
	314
	315	/* See gdbsupport/common-regcache.h. */
	316
	317	void
	318	regcache::raw_supply (int n, const void *buf)
	319	{
	320	if (buf)
	321	{
	322	memcpy (register_data (this, n, 0), buf, register_size (tdesc, n));
	323	#ifndef IN_PROCESS_AGENT
	324	if (register_status != NULL)
	325	register_status[n] = REG_VALID;
	326	#endif
	327	}
	328	else
	329	{
	330	memset (register_data (this, n, 0), 0, register_size (tdesc, n));
	331	#ifndef IN_PROCESS_AGENT
	332	if (register_status != NULL)
	333	register_status[n] = REG_UNAVAILABLE;
	334	#endif
	335	}
	336	}
	337
	338	/* Supply register N with value zero to REGCACHE. */
	339
	340	void
	341	supply_register_zeroed (struct regcache *regcache, int n)
	342	{
	343	memset (register_data (regcache, n, 0), 0,
	344	register_size (regcache->tdesc, n));
	345	#ifndef IN_PROCESS_AGENT
	346	if (regcache->register_status != NULL)
	347	regcache->register_status[n] = REG_VALID;
	348	#endif
	349	}
	350
	351	#ifndef IN_PROCESS_AGENT
	352
	353	/* Supply register called NAME with value zero to REGCACHE. */
	354
	355	void
	356	supply_register_by_name_zeroed (struct regcache *regcache,
	357	const char *name)
	358	{
	359	supply_register_zeroed (regcache, find_regno (regcache->tdesc, name));
	360	}
	361
	362	#endif
	363
	364	/* Supply the whole register set whose contents are stored in BUF, to
	365	REGCACHE. If BUF is NULL, all the registers' values are recorded
	366	as unavailable. */
	367
	368	void
	369	supply_regblock (struct regcache regcache, const void buf)
	370	{
	371	if (buf)
	372	{
	373	const struct target_desc *tdesc = regcache->tdesc;
	374
	375	memcpy (regcache->registers, buf, tdesc->registers_size);
	376	#ifndef IN_PROCESS_AGENT
	377	{
	378	int i;
	379
	380	for (i = 0; i < tdesc->reg_defs.size (); i++)
	381	regcache->register_status[i] = REG_VALID;
	382	}
	383	#endif
	384	}
	385	else
	386	{
	387	const struct target_desc *tdesc = regcache->tdesc;
	388
	389	memset (regcache->registers, 0, tdesc->registers_size);
	390	#ifndef IN_PROCESS_AGENT
	391	{
	392	int i;
	393
	394	for (i = 0; i < tdesc->reg_defs.size (); i++)
	395	regcache->register_status[i] = REG_UNAVAILABLE;
	396	}
	397	#endif
	398	}
	399	}
	400
	401	#ifndef IN_PROCESS_AGENT
	402
	403	void
	404	supply_register_by_name (struct regcache *regcache,
	405	const char name, const void buf)
	406	{
	407	supply_register (regcache, find_regno (regcache->tdesc, name), buf);
	408	}
	409
	410	#endif
	411
	412	void
	413	collect_register (struct regcache regcache, int n, void buf)
	414	{
	415	regcache->raw_collect (n, buf);
	416	}
	417
	418	/* See gdbsupport/common-regcache.h. */
	419
	420	void
	421	regcache::raw_collect (int n, void *buf) const
	422	{
	423	memcpy (buf, register_data (this, n, 1), register_size (tdesc, n));
	424	}
	425
	426	enum register_status
	427	regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
	428	ULONGEST *val)
	429	{
	430	int size;
	431
	432	gdb_assert (regcache != NULL);
	433	gdb_assert (regnum >= 0
	434	&& regnum < regcache->tdesc->reg_defs.size ());
	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	/* See regcache.h. */
	452
	453	ULONGEST
	454	regcache_raw_get_unsigned_by_name (struct regcache *regcache,
	455	const char *name)
	456	{
	457	return regcache_raw_get_unsigned (regcache,
	458	find_regno (regcache->tdesc, name));
	459	}
	460
	461	void
	462	collect_register_as_string (struct regcache regcache, int n, char buf)
	463	{
	464	bin2hex (register_data (regcache, n, 1), buf,
	465	register_size (regcache->tdesc, n));
	466	}
	467
	468	void
	469	collect_register_by_name (struct regcache *regcache,
	470	const char name, void buf)
	471	{
	472	collect_register (regcache, find_regno (regcache->tdesc, name), buf);
	473	}
	474
	475	/* Special handling for register PC. */
	476
	477	CORE_ADDR
	478	regcache_read_pc (struct regcache *regcache)
	479	{
	480	return the_target->read_pc (regcache);
	481	}
	482
	483	void
	484	regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
	485	{
	486	the_target->write_pc (regcache, pc);
	487	}
	488
	489	#endif
	490
	491	/* See gdbsupport/common-regcache.h. */
	492
	493	enum register_status
	494	regcache::get_register_status (int regnum) const
	495	{
	496	#ifndef IN_PROCESS_AGENT
	497	gdb_assert (regnum >= 0 && regnum < tdesc->reg_defs.size ());
	498	return (enum register_status) (register_status[regnum]);
	499	#else
	500	return REG_VALID;
	501	#endif
	502	}
	503
	504	/* See gdbsupport/common-regcache.h. */
	505
	506	bool
	507	regcache::raw_compare (int regnum, const void *buf, int offset) const
	508	{
	509	gdb_assert (buf != NULL);
	510
	511	const unsigned char *regbuf = register_data (this, regnum, 1);
	512	int size = register_size (tdesc, regnum);
	513	gdb_assert (size >= offset);
	514
	515	return (memcmp (buf, regbuf + offset, size - offset) == 0);
	516	}