/* Register support routines for the remote server for GDB.
- Copyright 2001, 2002, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 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 "gdbthread.h"
+#include "tdesc.h"
+#include "rsp-low.h"
+#ifndef IN_PROCESS_AGENT
-#include <stdlib.h>
-#include <string.h>
-
-/* The private data for the register cache. Note that we have one
- per inferior; this is primarily for simplicity, as the performance
- benefit is minimal. */
-
-struct inferior_regcache_data
+struct regcache *
+get_thread_regcache (struct thread_info *thread, int fetch)
{
- int registers_valid;
- char *registers;
-};
-
-static int register_bytes;
-
-static struct reg *reg_defs;
-static int num_registers;
+ struct regcache *regcache;
-const char **gdbserver_expedite_regs;
+ regcache = inferior_regcache_data (thread);
-static struct inferior_regcache_data *
-get_regcache (struct thread_info *inf, int fetch)
-{
- struct inferior_regcache_data *regcache;
+ /* 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);
- regcache = (struct inferior_regcache_data *) inferior_regcache_data (inf);
+ gdb_assert (proc->tdesc != NULL);
- if (regcache == NULL)
- fatal ("no register cache");
+ regcache = new_register_cache (proc->tdesc);
+ set_inferior_regcache_data (thread, regcache);
+ }
- /* FIXME - fetch registers for INF */
if (fetch && regcache->registers_valid == 0)
{
- fetch_inferior_registers (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_one (struct inferior_list_entry *entry)
+regcache_invalidate_thread (struct thread_info *thread)
{
- struct thread_info *thread = (struct thread_info *) entry;
- struct inferior_regcache_data *regcache;
+ struct regcache *regcache;
- regcache = (struct inferior_regcache_data *) inferior_regcache_data (thread);
+ regcache = inferior_regcache_data (thread);
+
+ if (regcache == NULL)
+ return;
if (regcache->registers_valid)
{
- struct thread_info *saved_inferior = current_inferior;
+ struct thread_info *saved_thread = current_thread;
- current_inferior = thread;
- store_inferior_registers (-1);
- current_inferior = saved_inferior;
+ current_thread = thread;
+ store_inferior_registers (regcache, -1);
+ current_thread = saved_thread;
}
regcache->registers_valid = 0;
}
-void
-regcache_invalidate ()
+static int
+regcache_invalidate_one (struct inferior_list_entry *entry,
+ void *pid_p)
{
- for_each_inferior (&all_threads, regcache_invalidate_one);
-}
+ struct thread_info *thread = (struct thread_info *) entry;
+ int pid = *(int *) pid_p;
-int
-registers_length (void)
-{
- return 2 * register_bytes;
+ /* Only invalidate the regcaches of threads of this process. */
+ if (ptid_get_pid (entry->id) == pid)
+ regcache_invalidate_thread (thread);
+
+ return 0;
}
-void *
-new_register_cache (void)
+void
+regcache_invalidate (void)
{
- struct inferior_regcache_data *regcache;
+ /* Only update the threads of the current process. */
+ int pid = ptid_get_pid (current_thread->entry.id);
- regcache = malloc (sizeof (*regcache));
+ find_inferior (&all_threads, regcache_invalidate_one, &pid);
+}
- /* 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 = calloc (1, register_bytes);
- if (regcache->registers == NULL)
- fatal ("Could not allocate register cache.");
+#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 *) xcalloc (1, tdesc->num_registers);
+ gdb_assert (REG_UNAVAILABLE == 0);
+#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;
}
-void
-free_register_cache (void *regcache_p)
+#ifndef IN_PROCESS_AGENT
+
+struct regcache *
+new_register_cache (const struct target_desc *tdesc)
{
- struct inferior_regcache_data *regcache
- = (struct inferior_regcache_data *) regcache_p;
+ struct regcache *regcache = XCNEW (struct regcache);
+
+ gdb_assert (tdesc->registers_size != 0);
- free (regcache->registers);
- free (regcache);
+ return init_register_cache (regcache, tdesc, NULL);
}
void
-set_register_cache (struct reg *regs, int n)
+free_register_cache (struct regcache *regcache)
{
- int offset, i;
-
- reg_defs = regs;
- num_registers = n;
-
- offset = 0;
- for (i = 0; i < n; i++)
+ if (regcache)
{
- regs[i].offset = offset;
- offset += regs[i].size;
+ if (regcache->registers_owned)
+ free (regcache->registers);
+ free (regcache->register_status);
+ free (regcache);
}
+}
+
+#endif
- register_bytes = offset / 8;
+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 (char *buf)
+registers_to_string (struct regcache *regcache, char *buf)
{
- char *registers = get_regcache (current_inferior, 1)->registers;
+ unsigned char *registers = regcache->registers;
+ const struct target_desc *tdesc = regcache->tdesc;
+ int i;
- convert_int_to_ascii (registers, buf, register_bytes);
+ 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 (char *buf)
+registers_from_string (struct regcache *regcache, char *buf)
{
int len = strlen (buf);
- char *registers = get_regcache (current_inferior, 1)->registers;
+ unsigned char *registers = regcache->registers;
+ const struct target_desc *tdesc = regcache->tdesc;
- if (len != register_bytes * 2)
+ if (len != tdesc->registers_size * 2)
{
- warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len);
- if (len > register_bytes * 2)
- len = register_bytes * 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;
}
- convert_ascii_to_int (buf, registers, len / 2);
+ hex2bin (buf, registers, len / 2);
}
struct reg *
-find_register_by_name (const char *name)
+find_register_by_name (const struct target_desc *tdesc, const char *name)
{
int i;
- for (i = 0; i < num_registers; i++)
- if (!strcmp (name, reg_defs[i].name))
- return ®_defs[i];
- fatal ("Unknown register %s requested", name);
- return 0;
+ for (i = 0; i < tdesc->num_registers; i++)
+ if (strcmp (name, tdesc->reg_defs[i].name) == 0)
+ return &tdesc->reg_defs[i];
+ internal_error (__FILE__, __LINE__, "Unknown register %s requested",
+ name);
}
int
-find_regno (const char *name)
+find_regno (const struct target_desc *tdesc, const char *name)
{
int i;
- for (i = 0; i < num_registers; i++)
- if (!strcmp (name, reg_defs[i].name))
+ for (i = 0; i < tdesc->num_registers; i++)
+ if (strcmp (name, tdesc->reg_defs[i].name) == 0)
return i;
- fatal ("Unknown register %s requested", name);
- return -1;
+ internal_error (__FILE__, __LINE__, "Unknown register %s requested",
+ name);
}
struct reg *
-find_register_by_number (int n)
+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)
{
- return ®_defs[n];
+ /* Flush and release all pre-existing register caches. */
+ for_each_inferior (&all_threads, free_register_cache_thread_one);
}
+#endif
int
-register_size (int n)
+register_cache_size (const struct target_desc *tdesc)
{
- return reg_defs[n].size / 8;
+ return tdesc->registers_size;
}
-static char *
-register_data (int n, int fetch)
+int
+register_size (const struct target_desc *tdesc, int n)
{
- char *registers = get_regcache (current_inferior, fetch)->registers;
+ return tdesc->reg_defs[n].size / 8;
+}
+
+/* See common/common-regcache.h. */
- return registers + (reg_defs[n].offset / 8);
+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 (int n, const void *buf)
+supply_register (struct regcache *regcache, int n, const void *buf)
{
- memcpy (register_data (n, 0), buf, register_size (n));
+ 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_by_name (const char *name, const void *buf)
+supply_register_zeroed (struct regcache *regcache, int n)
{
- supply_register (find_regno (name), buf);
+ 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
-collect_register (int n, void *buf)
+supply_regblock (struct regcache *regcache, const void *buf)
{
- memcpy (buf, register_data (n, 1), register_size (n));
+ 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));
}
+#ifndef IN_PROCESS_AGENT
+
void
-collect_register_as_string (int n, char *buf)
+collect_register_as_string (struct regcache *regcache, int n, char *buf)
{
- convert_int_to_ascii (register_data (n, 1), buf, register_size (n));
+ bin2hex (register_data (regcache, n, 1), buf,
+ register_size (regcache->tdesc, n));
}
void
-collect_register_by_name (const char *name, void *buf)
+collect_register_by_name (struct regcache *regcache,
+ const char *name, void *buf)
{
- collect_register (find_regno (name), 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
projects / deliverable / binutils-gdb.git / blobdiff