/* Register support routines for the remote server for GDB.
- Copyright 2001, 2002
+ Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "regdef.h"
#include <stdlib.h>
#include <string.h>
-static char *registers;
static int register_bytes;
static struct reg *reg_defs;
const char **gdbserver_expedite_regs;
-int
-registers_length (void)
+struct regcache *
+get_thread_regcache (struct thread_info *thread, int fetch)
+{
+ struct regcache *regcache;
+
+ regcache = (struct regcache *) inferior_regcache_data (thread);
+
+ if (regcache == NULL)
+ fatal ("no register cache");
+
+ if (fetch && regcache->registers_valid == 0)
+ {
+ struct thread_info *saved_inferior = current_inferior;
+
+ current_inferior = thread;
+ fetch_inferior_registers (regcache, -1);
+ current_inferior = saved_inferior;
+ regcache->registers_valid = 1;
+ }
+
+ return regcache;
+}
+
+void
+regcache_invalidate_one (struct inferior_list_entry *entry)
{
- return 2 * register_bytes;
+ struct thread_info *thread = (struct thread_info *) entry;
+ struct regcache *regcache;
+
+ regcache = (struct regcache *) inferior_regcache_data (thread);
+
+ if (regcache == NULL)
+ return;
+
+ if (regcache->registers_valid)
+ {
+ struct thread_info *saved_inferior = current_inferior;
+
+ current_inferior = thread;
+ store_inferior_registers (regcache, -1);
+ current_inferior = saved_inferior;
+ }
+
+ regcache->registers_valid = 0;
+}
+
+void
+regcache_invalidate (void)
+{
+ for_each_inferior (&all_threads, regcache_invalidate_one);
+}
+
+struct regcache *
+init_register_cache (struct regcache *regcache, unsigned char *regbuf)
+{
+ if (regbuf == NULL)
+ {
+ /* 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->registers = xcalloc (1, register_bytes);
+ regcache->registers_owned = 1;
+ }
+ else
+ {
+ regcache->registers = regbuf;
+ regcache->registers_owned = 0;
+ }
+
+ regcache->registers_valid = 0;
+
+ return regcache;
+}
+
+struct regcache *
+new_register_cache (void)
+{
+ struct regcache *regcache;
+
+ if (register_bytes == 0)
+ return NULL; /* The architecture hasn't been initialized yet. */
+
+ regcache = xmalloc (sizeof (*regcache));
+ return init_register_cache (regcache, NULL);
+}
+
+void
+free_register_cache (struct regcache *regcache)
+{
+ if (regcache)
+ {
+ free (regcache->registers);
+ free (regcache);
+ }
+}
+
+void
+regcache_cpy (struct regcache *dst, struct regcache *src)
+{
+ memcpy (dst->registers, src->registers, register_bytes);
+ dst->registers_valid = src->registers_valid;
+}
+
+static void
+realloc_register_cache (struct inferior_list_entry *thread_p)
+{
+ struct thread_info *thread = (struct thread_info *) thread_p;
+ struct regcache *regcache
+ = (struct regcache *) inferior_regcache_data (thread);
+
+ if (regcache != NULL)
+ regcache_invalidate_one (thread_p);
+ free_register_cache (regcache);
+ set_inferior_regcache_data (thread, new_register_cache ());
}
void
set_register_cache (struct reg *regs, int n)
{
int offset, i;
-
+
+ /* Before changing the register cache internal layout, flush the
+ contents of valid caches back to the threads. */
+ regcache_invalidate ();
+
reg_defs = regs;
num_registers = n;
}
register_bytes = offset / 8;
- registers = malloc (offset / 8);
- if (!registers)
- fatal ("Could not allocate register cache.");
+
+ /* Make sure PBUFSIZ is large enough to hold a full register packet. */
+ if (2 * register_bytes + 32 > PBUFSIZ)
+ fatal ("Register packet size exceeds PBUFSIZ.");
+
+ /* Re-allocate all pre-existing register caches. */
+ for_each_inferior (&all_threads, realloc_register_cache);
+}
+
+int
+register_cache_size (void)
+{
+ return register_bytes;
}
void
-registers_to_string (char *buf)
+registers_to_string (struct regcache *regcache, char *buf)
{
+ unsigned char *registers = regcache->registers;
+
convert_int_to_ascii (registers, buf, register_bytes);
}
void
-registers_from_string (char *buf)
+registers_from_string (struct regcache *regcache, char *buf)
{
int len = strlen (buf);
+ unsigned char *registers = regcache->registers;
if (len != register_bytes * 2)
{
- warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len);
+ warning ("Wrong sized register packet (expected %d bytes, got %d)",
+ 2*register_bytes, len);
if (len > register_bytes * 2)
len = register_bytes * 2;
}
return reg_defs[n].size / 8;
}
-char *
-register_data (int n)
+static unsigned char *
+register_data (struct regcache *regcache, int n, int fetch)
+{
+ return regcache->registers + (reg_defs[n].offset / 8);
+}
+
+void
+supply_register (struct regcache *regcache, int n, const void *buf)
+{
+ if (buf)
+ memcpy (register_data (regcache, n, 0), buf, register_size (n));
+ else
+ memset (register_data (regcache, n, 0), 0, register_size (n));
+}
+
+void
+supply_regblock (struct regcache *regcache, const void *buf)
+{
+ if (buf)
+ memcpy (regcache->registers, buf, register_bytes);
+ else
+ memset (regcache->registers, 0, register_bytes);
+}
+
+void
+supply_register_by_name (struct regcache *regcache,
+ const char *name, const void *buf)
+{
+ supply_register (regcache, find_regno (name), buf);
+}
+
+void
+collect_register (struct regcache *regcache, int n, void *buf)
+{
+ memcpy (buf, register_data (regcache, n, 1), register_size (n));
+}
+
+void
+collect_register_as_string (struct regcache *regcache, int n, char *buf)
{
- return registers + (reg_defs[n].offset / 8);
+ convert_int_to_ascii (register_data (regcache, n, 1),
+ buf, register_size (n));
}
+void
+collect_register_by_name (struct regcache *regcache,
+ const char *name, void *buf)
+{
+ collect_register (regcache, find_regno (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");
+}