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

/* Register support routines for the remote server for GDB.
   Copyright (C) 2001-2017 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 = 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.  */
      if (!VEC_empty (tdesc_reg_p, regcache->tdesc->reg_defs))
	memset (regcache->register_status, REG_UNAVAILABLE,
		VEC_length (tdesc_reg_p, regcache->tdesc->reg_defs));
      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 = 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;
}

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 (VEC_length (tdesc_reg_p, tdesc->reg_defs));
      if (!VEC_empty (tdesc_reg_p, tdesc->reg_defs))
	memset ((void *) regcache->register_status, REG_UNAVAILABLE,
		VEC_length (tdesc_reg_p, tdesc->reg_defs));
#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,
	    VEC_length (tdesc_reg_p, src->tdesc->reg_defs));
#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;
  reg *reg;

  for (i = 0; VEC_iterate (tdesc_reg_p, tdesc->reg_defs, i, reg); 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;
  reg *reg;

  for (i = 0; VEC_iterate (tdesc_reg_p, tdesc->reg_defs, i, reg); i++)
    if (strcmp (name, reg->name) == 0)
      return i;
  internal_error (__FILE__, __LINE__, "Unknown register %s requested",
		  name);
}

#endif

struct reg *
find_register_by_number (const struct target_desc *tdesc, int n)
{
  return VEC_index (tdesc_reg_p, tdesc->reg_defs, n);
}

#ifndef IN_PROCESS_AGENT
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);
    }
}

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 find_register_by_number (tdesc, 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
	  + find_register_by_number (regcache->tdesc, 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 < VEC_length (tdesc_reg_p, tdesc->reg_defs); 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 < VEC_length (tdesc_reg_p, tdesc->reg_defs); 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 < VEC_length (tdesc_reg_p, regcache->tdesc->reg_defs));

  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
0a30fbc4	1	/* Register support routines for the remote server for GDB.
61baf725	2	Copyright (C) 2001-2017 Free Software Foundation, Inc.
0a30fbc4 DJ	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
a9762ec7	8	the Free Software Foundation; either version 3 of the License, or
0a30fbc4 DJ	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
a9762ec7	17	along with this program. If not, see <http://www.gnu.org/licenses/>. */
0a30fbc4 DJ	18
	19	#include "server.h"
	20	#include "regdef.h"
623b6bdf	21	#include "gdbthread.h"
3aee8918	22	#include "tdesc.h"
9c3d6531	23	#include "rsp-low.h"
fa593d66 PA	24	#ifndef IN_PROCESS_AGENT
fa593d66 PA	25
442ea881 PA	26	struct regcache *
442ea881 PA	27	get_thread_regcache (struct thread_info *thread, int fetch)
c04a1aa8	28	{
442ea881	29	struct regcache *regcache;
c04a1aa8	30
6afd337d	31	regcache = thread_regcache_data (thread);
c04a1aa8	32
3aee8918 PA	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. */
c04a1aa8	40	if (regcache == NULL)
3aee8918 PA	41	{
	42	struct process_info *proc = get_thread_process (thread);
	43
38e08fca	44	gdb_assert (proc->tdesc != NULL);
3aee8918 PA	45
3aee8918 PA	46	regcache = new_register_cache (proc->tdesc);
6afd337d	47	set_thread_regcache_data (thread, regcache);
3aee8918	48	}
c04a1aa8	49
0d62e5e8 DJ	50	if (fetch && regcache->registers_valid == 0)
0d62e5e8 DJ	51	{
0bfdf32f	52	struct thread_info *saved_thread = current_thread;
442ea881	53
0bfdf32f	54	current_thread = thread;
098dbe61	55	/* Invalidate all registers, to prevent stale left-overs. */
a059f00c SDJ	56	if (!VEC_empty (tdesc_reg_p, regcache->tdesc->reg_defs))
	57	memset (regcache->register_status, REG_UNAVAILABLE,
	58	VEC_length (tdesc_reg_p, regcache->tdesc->reg_defs));
442ea881	59	fetch_inferior_registers (regcache, -1);
0bfdf32f	60	current_thread = saved_thread;
0d62e5e8 DJ	61	regcache->registers_valid = 1;
	62	}
	63
c04a1aa8 DJ	64	return regcache;
	65	}
	66
361c8ade GB	67	/* See common/common-regcache.h. */
	68
	69	struct regcache *
	70	get_thread_regcache_for_ptid (ptid_t ptid)
	71	{
	72	return get_thread_regcache (find_thread_ptid (ptid), 1);
	73	}
	74
0d62e5e8	75	void
3aee8918	76	regcache_invalidate_thread (struct thread_info *thread)
0d62e5e8	77	{
442ea881	78	struct regcache *regcache;
0d62e5e8	79
6afd337d	80	regcache = thread_regcache_data (thread);
0d62e5e8	81
45ba0d02 PA	82	if (regcache == NULL)
	83	return;
	84
0d62e5e8 DJ	85	if (regcache->registers_valid)
0d62e5e8 DJ	86	{
0bfdf32f	87	struct thread_info *saved_thread = current_thread;
0d62e5e8	88
0bfdf32f	89	current_thread = thread;
442ea881	90	store_inferior_registers (regcache, -1);
0bfdf32f	91	current_thread = saved_thread;
0d62e5e8 DJ	92	}
	93
	94	regcache->registers_valid = 0;
	95	}
	96
3aee8918 PA	97	static int
	98	regcache_invalidate_one (struct inferior_list_entry *entry,
	99	void *pid_p)
	100	{
	101	struct thread_info thread = (struct thread_info ) entry;
	102	int pid = (int ) pid_p;
	103
	104	/* Only invalidate the regcaches of threads of this process. */
	105	if (ptid_get_pid (entry->id) == pid)
	106	regcache_invalidate_thread (thread);
	107
	108	return 0;
	109	}
	110
80d82c19 JB	111	/* See regcache.h. */
	112
	113	void
	114	regcache_invalidate_pid (int pid)
	115	{
	116	find_inferior (&all_threads, regcache_invalidate_one, &pid);
	117	}
	118
	119	/* See regcache.h. */
	120
0d62e5e8	121	void
442ea881	122	regcache_invalidate (void)
0d62e5e8	123	{
3aee8918	124	/* Only update the threads of the current process. */
0bfdf32f	125	int pid = ptid_get_pid (current_thread->entry.id);
3aee8918	126
80d82c19	127	regcache_invalidate_pid (pid);
0d62e5e8 DJ	128	}
0d62e5e8 DJ	129
fa593d66 PA	130	#endif
fa593d66 PA	131
219f2f23	132	struct regcache *
3aee8918 PA	133	init_register_cache (struct regcache *regcache,
	134	const struct target_desc *tdesc,
	135	unsigned char *regbuf)
219f2f23 PA	136	{
	137	if (regbuf == NULL)
	138	{
87f6c4e3	139	#ifndef IN_PROCESS_AGENT
219f2f23 PA	140	/* Make sure to zero-initialize the register cache when it is
	141	created, in case there are registers the target never
	142	fetches. This way they'll read as zero instead of
	143	garbage. */
3aee8918	144	regcache->tdesc = tdesc;
224c3ddb SM	145	regcache->registers
224c3ddb SM	146	= (unsigned char *) xcalloc (1, tdesc->registers_size);
219f2f23	147	regcache->registers_owned = 1;
224c3ddb	148	regcache->register_status
f7000548	149	= (unsigned char *) xmalloc (VEC_length (tdesc_reg_p, tdesc->reg_defs));
a059f00c SDJ	150	if (!VEC_empty (tdesc_reg_p, tdesc->reg_defs))
	151	memset ((void *) regcache->register_status, REG_UNAVAILABLE,
	152	VEC_length (tdesc_reg_p, tdesc->reg_defs));
fa593d66	153	#else
38e08fca	154	gdb_assert_not_reached ("can't allocate memory from the heap");
fa593d66	155	#endif
87f6c4e3 GB	156	}
87f6c4e3 GB	157	else
219f2f23	158	{
3aee8918	159	regcache->tdesc = tdesc;
219f2f23 PA	160	regcache->registers = regbuf;
219f2f23 PA	161	regcache->registers_owned = 0;
1c79eb8a PA	162	#ifndef IN_PROCESS_AGENT
	163	regcache->register_status = NULL;
	164	#endif
219f2f23 PA	165	}
	166
	167	regcache->registers_valid = 0;
	168
	169	return regcache;
	170	}
	171
fa593d66 PA	172	#ifndef IN_PROCESS_AGENT
fa593d66 PA	173
442ea881	174	struct regcache *
3aee8918	175	new_register_cache (const struct target_desc *tdesc)
c04a1aa8	176	{
8d749320	177	struct regcache *regcache = XCNEW (struct regcache);
c04a1aa8	178
3aee8918	179	gdb_assert (tdesc->registers_size != 0);
5822d809	180
3aee8918	181	return init_register_cache (regcache, tdesc, NULL);
c04a1aa8 DJ	182	}
	183
	184	void
442ea881	185	free_register_cache (struct regcache *regcache)
c04a1aa8	186	{
5822d809 PA	187	if (regcache)
5822d809 PA	188	{
fa593d66 PA	189	if (regcache->registers_owned)
fa593d66 PA	190	free (regcache->registers);
1c79eb8a	191	free (regcache->register_status);
5822d809 PA	192	free (regcache);
5822d809 PA	193	}
c04a1aa8 DJ	194	}
c04a1aa8 DJ	195
fa593d66 PA	196	#endif
fa593d66 PA	197
219f2f23 PA	198	void
	199	regcache_cpy (struct regcache dst, struct regcache src)
	200	{
3aee8918 PA	201	gdb_assert (src != NULL && dst != NULL);
	202	gdb_assert (src->tdesc == dst->tdesc);
	203	gdb_assert (src != dst);
	204
	205	memcpy (dst->registers, src->registers, src->tdesc->registers_size);
1c79eb8a PA	206	#ifndef IN_PROCESS_AGENT
1c79eb8a PA	207	if (dst->register_status != NULL && src->register_status != NULL)
3aee8918	208	memcpy (dst->register_status, src->register_status,
f7000548	209	VEC_length (tdesc_reg_p, src->tdesc->reg_defs));
1c79eb8a	210	#endif
219f2f23 PA	211	dst->registers_valid = src->registers_valid;
	212	}
	213
219f2f23	214
fa593d66 PA	215	#ifndef IN_PROCESS_AGENT
fa593d66 PA	216
0a30fbc4	217	void
442ea881	218	registers_to_string (struct regcache regcache, char buf)
0a30fbc4	219	{
442ea881	220	unsigned char *registers = regcache->registers;
3aee8918	221	const struct target_desc *tdesc = regcache->tdesc;
1c79eb8a	222	int i;
f7000548	223	reg *reg;
c04a1aa8	224
f7000548	225	for (i = 0; VEC_iterate (tdesc_reg_p, tdesc->reg_defs, i, reg); i++)
1c79eb8a PA	226	{
	227	if (regcache->register_status[i] == REG_VALID)
	228	{
e9371aff	229	bin2hex (registers, buf, register_size (tdesc, i));
3aee8918	230	buf += register_size (tdesc, i) * 2;
1c79eb8a PA	231	}
	232	else
	233	{
3aee8918 PA	234	memset (buf, 'x', register_size (tdesc, i) * 2);
3aee8918 PA	235	buf += register_size (tdesc, i) * 2;
1c79eb8a	236	}
3aee8918	237	registers += register_size (tdesc, i);
1c79eb8a PA	238	}
1c79eb8a PA	239	*buf = '\0';
0a30fbc4 DJ	240	}
	241
	242	void
442ea881	243	registers_from_string (struct regcache regcache, char buf)
0a30fbc4 DJ	244	{
0a30fbc4 DJ	245	int len = strlen (buf);
442ea881	246	unsigned char *registers = regcache->registers;
3aee8918	247	const struct target_desc *tdesc = regcache->tdesc;
0a30fbc4	248
3aee8918	249	if (len != tdesc->registers_size * 2)
0a30fbc4	250	{
1b3f6016	251	warning ("Wrong sized register packet (expected %d bytes, got %d)",
3aee8918 PA	252	2 * tdesc->registers_size, len);
	253	if (len > tdesc->registers_size * 2)
	254	len = tdesc->registers_size * 2;
0a30fbc4	255	}
a7191e8b	256	hex2bin (buf, registers, len / 2);
0a30fbc4 DJ	257	}
0a30fbc4 DJ	258
0a30fbc4	259	int
3aee8918	260	find_regno (const struct target_desc tdesc, const char name)
0a30fbc4 DJ	261	{
0a30fbc4 DJ	262	int i;
f7000548	263	reg *reg;
0a30fbc4	264
f7000548 YQ	265	for (i = 0; VEC_iterate (tdesc_reg_p, tdesc->reg_defs, i, reg); i++)
f7000548 YQ	266	if (strcmp (name, reg->name) == 0)
0a30fbc4	267	return i;
38e08fca GB	268	internal_error (__FILE__, __LINE__, "Unknown register %s requested",
38e08fca GB	269	name);
0a30fbc4 DJ	270	}
0a30fbc4 DJ	271
f7000548 YQ	272	#endif
f7000548 YQ	273
0a30fbc4	274	struct reg *
3aee8918	275	find_register_by_number (const struct target_desc *tdesc, int n)
0a30fbc4	276	{
f7000548	277	return VEC_index (tdesc_reg_p, tdesc->reg_defs, n);
0a30fbc4 DJ	278	}
0a30fbc4 DJ	279
3aee8918 PA	280	#ifndef IN_PROCESS_AGENT
	281	static void
	282	free_register_cache_thread (struct thread_info *thread)
	283	{
6afd337d	284	struct regcache *regcache = thread_regcache_data (thread);
3aee8918 PA	285
	286	if (regcache != NULL)
	287	{
	288	regcache_invalidate_thread (thread);
	289	free_register_cache (regcache);
6afd337d	290	set_thread_regcache_data (thread, NULL);
3aee8918 PA	291	}
	292	}
	293
	294	static void
	295	free_register_cache_thread_one (struct inferior_list_entry *entry)
	296	{
	297	struct thread_info thread = (struct thread_info ) entry;
	298
	299	free_register_cache_thread (thread);
	300	}
	301
	302	void
	303	regcache_release (void)
	304	{
	305	/* Flush and release all pre-existing register caches. */
	306	for_each_inferior (&all_threads, free_register_cache_thread_one);
	307	}
	308	#endif
	309
0a30fbc4	310	int
3aee8918	311	register_cache_size (const struct target_desc *tdesc)
0a30fbc4	312	{
3aee8918 PA	313	return tdesc->registers_size;
	314	}
	315
	316	int
	317	register_size (const struct target_desc *tdesc, int n)
	318	{
f7000548	319	return find_register_by_number (tdesc, n)->size / 8;
0a30fbc4 DJ	320	}
0a30fbc4 DJ	321
8d689ee5 YQ	322	/* See common/common-regcache.h. */
	323
	324	int
	325	regcache_register_size (const struct regcache *regcache, int n)
	326	{
	327	return register_size (regcache->tdesc, n);
	328	}
	329
f450004a	330	static unsigned char *
442ea881	331	register_data (struct regcache *regcache, int n, int fetch)
0a30fbc4	332	{
f7000548 YQ	333	return (regcache->registers
f7000548 YQ	334	+ find_register_by_number (regcache->tdesc, n)->offset / 8);
0a30fbc4 DJ	335	}
0a30fbc4 DJ	336
1c79eb8a PA	337	/* Supply register N, whose contents are stored in BUF, to REGCACHE.
	338	If BUF is NULL, the register's value is recorded as
	339	unavailable. */
	340
58caa3dc	341	void
442ea881	342	supply_register (struct regcache regcache, int n, const void buf)
58caa3dc	343	{
3327ccf7	344	if (buf)
1c79eb8a	345	{
3aee8918 PA	346	memcpy (register_data (regcache, n, 0), buf,
3aee8918 PA	347	register_size (regcache->tdesc, n));
1c79eb8a PA	348	#ifndef IN_PROCESS_AGENT
	349	if (regcache->register_status != NULL)
	350	regcache->register_status[n] = REG_VALID;
	351	#endif
	352	}
3327ccf7	353	else
1c79eb8a	354	{
3aee8918 PA	355	memset (register_data (regcache, n, 0), 0,
3aee8918 PA	356	register_size (regcache->tdesc, n));
1c79eb8a PA	357	#ifndef IN_PROCESS_AGENT
	358	if (regcache->register_status != NULL)
	359	regcache->register_status[n] = REG_UNAVAILABLE;
	360	#endif
	361	}
58caa3dc DJ	362	}
58caa3dc DJ	363
1c79eb8a PA	364	/* Supply register N with value zero to REGCACHE. */
	365
	366	void
	367	supply_register_zeroed (struct regcache *regcache, int n)
	368	{
3aee8918 PA	369	memset (register_data (regcache, n, 0), 0,
3aee8918 PA	370	register_size (regcache->tdesc, n));
1c79eb8a PA	371	#ifndef IN_PROCESS_AGENT
	372	if (regcache->register_status != NULL)
	373	regcache->register_status[n] = REG_VALID;
	374	#endif
	375	}
	376
	377	/* Supply the whole register set whose contents are stored in BUF, to
	378	REGCACHE. If BUF is NULL, all the registers' values are recorded
	379	as unavailable. */
	380
219f2f23 PA	381	void
	382	supply_regblock (struct regcache regcache, const void buf)
	383	{
	384	if (buf)
1c79eb8a	385	{
3aee8918 PA	386	const struct target_desc *tdesc = regcache->tdesc;
	387
	388	memcpy (regcache->registers, buf, tdesc->registers_size);
1c79eb8a PA	389	#ifndef IN_PROCESS_AGENT
	390	{
	391	int i;
	392
f7000548	393	for (i = 0; i < VEC_length (tdesc_reg_p, tdesc->reg_defs); i++)
1c79eb8a PA	394	regcache->register_status[i] = REG_VALID;
	395	}
	396	#endif
	397	}
219f2f23	398	else
1c79eb8a	399	{
3aee8918 PA	400	const struct target_desc *tdesc = regcache->tdesc;
	401
	402	memset (regcache->registers, 0, tdesc->registers_size);
1c79eb8a PA	403	#ifndef IN_PROCESS_AGENT
	404	{
	405	int i;
	406
f7000548	407	for (i = 0; i < VEC_length (tdesc_reg_p, tdesc->reg_defs); i++)
1c79eb8a PA	408	regcache->register_status[i] = REG_UNAVAILABLE;
	409	}
	410	#endif
	411	}
219f2f23 PA	412	}
219f2f23 PA	413
fa593d66 PA	414	#ifndef IN_PROCESS_AGENT
fa593d66 PA	415
58caa3dc	416	void
442ea881 PA	417	supply_register_by_name (struct regcache *regcache,
442ea881 PA	418	const char name, const void buf)
58caa3dc	419	{
3aee8918	420	supply_register (regcache, find_regno (regcache->tdesc, name), buf);
58caa3dc DJ	421	}
58caa3dc DJ	422
fa593d66 PA	423	#endif
fa593d66 PA	424
58caa3dc	425	void
442ea881	426	collect_register (struct regcache regcache, int n, void buf)
58caa3dc	427	{
3aee8918 PA	428	memcpy (buf, register_data (regcache, n, 1),
3aee8918 PA	429	register_size (regcache->tdesc, n));
0d62e5e8 DJ	430	}
0d62e5e8 DJ	431
68ce2059 AT	432	enum register_status
	433	regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
	434	ULONGEST *val)
	435	{
	436	int size;
	437
	438	gdb_assert (regcache != NULL);
f7000548 YQ	439	gdb_assert (regnum >= 0
f7000548 YQ	440	&& regnum < VEC_length (tdesc_reg_p, regcache->tdesc->reg_defs));
68ce2059 AT	441
	442	size = register_size (regcache->tdesc, regnum);
	443
	444	if (size > (int) sizeof (ULONGEST))
	445	error (_("That operation is not available on integers of more than"
	446	"%d bytes."),
	447	(int) sizeof (ULONGEST));
	448
9f6a71b4	449	*val = 0;
68ce2059 AT	450	collect_register (regcache, regnum, val);
	451
	452	return REG_VALID;
	453	}
	454
fa593d66 PA	455	#ifndef IN_PROCESS_AGENT
fa593d66 PA	456
0d62e5e8	457	void
442ea881	458	collect_register_as_string (struct regcache regcache, int n, char buf)
0d62e5e8	459	{
e9371aff TT	460	bin2hex (register_data (regcache, n, 1), buf,
e9371aff TT	461	register_size (regcache->tdesc, n));
58caa3dc DJ	462	}
	463
	464	void
442ea881 PA	465	collect_register_by_name (struct regcache *regcache,
442ea881 PA	466	const char name, void buf)
58caa3dc	467	{
3aee8918	468	collect_register (regcache, find_regno (regcache->tdesc, name), buf);
58caa3dc	469	}
219f2f23 PA	470
	471	/* Special handling for register PC. */
	472
	473	CORE_ADDR
	474	regcache_read_pc (struct regcache *regcache)
	475	{
	476	CORE_ADDR pc_val;
	477
	478	if (the_target->read_pc)
	479	pc_val = the_target->read_pc (regcache);
	480	else
	481	internal_error (__FILE__, __LINE__,
	482	"regcache_read_pc: Unable to find PC");
	483
	484	return pc_val;
	485	}
	486
	487	void
	488	regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
	489	{
	490	if (the_target->write_pc)
	491	the_target->write_pc (regcache, pc);
	492	else
	493	internal_error (__FILE__, __LINE__,
	494	"regcache_write_pc: Unable to update PC");
	495	}
fa593d66 PA	496
fa593d66 PA	497	#endif