/* Register support routines for the remote server for GDB.
- Copyright (C) 2001-2002, 2004-2005, 2007-2012 Free Software
- Foundation, Inc.
+ Copyright (C) 2001-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "server.h"
#include "regdef.h"
#include "gdbthread.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-static int register_bytes;
-
-static struct reg *reg_defs;
-static int num_registers;
-
-const char **gdbserver_expedite_regs;
-
+#include "tdesc.h"
+#include "rsp-low.h"
#ifndef IN_PROCESS_AGENT
struct regcache *
{
struct regcache *regcache;
- regcache = (struct regcache *) inferior_regcache_data (thread);
+ 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)
- fatal ("no register cache");
+ {
+ 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_inferior = current_inferior;
+ struct thread_info *saved_thread = current_thread;
- current_inferior = 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_inferior = saved_inferior;
+ 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 regcache *regcache;
- regcache = (struct regcache *) inferior_regcache_data (thread);
+ regcache = thread_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;
+ current_thread = thread;
store_inferior_registers (regcache, -1);
- current_inferior = saved_inferior;
+ 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)
{
- for_each_inferior (&all_threads, regcache_invalidate_one);
+ /* 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, unsigned char *regbuf)
+init_register_cache (struct regcache *regcache,
+ const struct target_desc *tdesc,
+ unsigned char *regbuf)
{
-#ifndef IN_PROCESS_AGENT
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->registers = xcalloc (1, register_bytes);
+ regcache->tdesc = tdesc;
+ regcache->registers
+ = (unsigned char *) xcalloc (1, tdesc->registers_size);
regcache->registers_owned = 1;
- regcache->register_status = xcalloc (1, num_registers);
- gdb_assert (REG_UNAVAILABLE == 0);
- }
- else
+ regcache->register_status
+ = (unsigned char *) xmalloc (tdesc->reg_defs.size ());
+ memset ((void *) regcache->register_status, REG_UNAVAILABLE,
+ tdesc->reg_defs.size ());
#else
- if (regbuf == NULL)
- fatal ("init_register_cache: can't allocate memory from the heap");
- 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
#ifndef IN_PROCESS_AGENT
struct regcache *
-new_register_cache (void)
+new_register_cache (const struct target_desc *tdesc)
{
- struct regcache *regcache;
+ struct regcache *regcache = new struct regcache;
- if (register_bytes == 0)
- return NULL; /* The architecture hasn't been initialized yet. */
+ gdb_assert (tdesc->registers_size != 0);
- regcache = xmalloc (sizeof (*regcache));
- return init_register_cache (regcache, NULL);
+ return init_register_cache (regcache, tdesc, NULL);
}
void
if (regcache->registers_owned)
free (regcache->registers);
free (regcache->register_status);
- free (regcache);
+ delete regcache;
}
}
void
regcache_cpy (struct regcache *dst, struct regcache *src)
{
- memcpy (dst->registers, src->registers, register_bytes);
+ 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, num_registers);
+ memcpy (dst->register_status, src->register_status,
+ src->tdesc->reg_defs.size ());
#endif
dst->registers_valid = src->registers_valid;
}
-#ifndef IN_PROCESS_AGENT
-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 ());
-}
-#endif
-
-void
-set_register_cache (struct reg *regs, int n)
-{
- int offset, i;
-
-#ifndef IN_PROCESS_AGENT
- /* Before changing the register cache internal layout, flush the
- contents of valid caches back to the threads. */
- regcache_invalidate ();
-#endif
-
- reg_defs = regs;
- num_registers = n;
+/* Return a reference to the description of register N. */
- offset = 0;
- for (i = 0; i < n; i++)
- {
- regs[i].offset = offset;
- offset += regs[i].size;
- }
-
- register_bytes = offset / 8;
-
- /* Make sure PBUFSIZ is large enough to hold a full register packet. */
- if (2 * register_bytes + 32 > PBUFSIZ)
- fatal ("Register packet size exceeds PBUFSIZ.");
-
-#ifndef IN_PROCESS_AGENT
- /* Re-allocate all pre-existing register caches. */
- for_each_inferior (&all_threads, realloc_register_cache);
-#endif
-}
-
-int
-register_cache_size (void)
+static const struct reg &
+find_register_by_number (const struct target_desc *tdesc, int n)
{
- return register_bytes;
+ return tdesc->reg_defs[n];
}
#ifndef IN_PROCESS_AGENT
registers_to_string (struct regcache *regcache, char *buf)
{
unsigned char *registers = regcache->registers;
- int i;
+ const struct target_desc *tdesc = regcache->tdesc;
- for (i = 0; i < num_registers; i++)
+ for (int i = 0; i < tdesc->reg_defs.size (); ++i)
{
if (regcache->register_status[i] == REG_VALID)
{
- convert_int_to_ascii (registers, buf, register_size (i));
- buf += register_size (i) * 2;
+ bin2hex (registers, buf, register_size (tdesc, i));
+ buf += register_size (tdesc, i) * 2;
}
else
{
- memset (buf, 'x', register_size (i) * 2);
- buf += register_size (i) * 2;
+ memset (buf, 'x', register_size (tdesc, i) * 2);
+ buf += register_size (tdesc, i) * 2;
}
- registers += register_size (i);
+ registers += register_size (tdesc, i);
}
*buf = '\0';
}
{
int len = strlen (buf);
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;
+ 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;
}
- convert_ascii_to_int (buf, registers, len / 2);
+ internal_error (__FILE__, __LINE__, "Unknown register %s requested",
+ name);
}
-struct reg *
-find_register_by_name (const char *name)
+static void
+free_register_cache_thread (struct thread_info *thread)
{
- int i;
+ struct regcache *regcache = thread_regcache_data (thread);
- 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;
+ if (regcache != NULL)
+ {
+ regcache_invalidate_thread (thread);
+ free_register_cache (regcache);
+ set_thread_regcache_data (thread, NULL);
+ }
}
-int
-find_regno (const char *name)
+void
+regcache_release (void)
{
- int i;
+ /* Flush and release all pre-existing register caches. */
+ for_each_thread (free_register_cache_thread);
+}
+#endif
- for (i = 0; i < num_registers; i++)
- if (!strcmp (name, reg_defs[i].name))
- return i;
- fatal ("Unknown register %s requested", name);
- return -1;
+int
+register_cache_size (const struct target_desc *tdesc)
+{
+ return tdesc->registers_size;
}
-struct reg *
-find_register_by_number (int n)
+int
+register_size (const struct target_desc *tdesc, int n)
{
- return ®_defs[n];
+ return find_register_by_number (tdesc, n).size / 8;
}
-#endif
+/* See common/common-regcache.h. */
int
-register_size (int n)
+regcache_register_size (const struct regcache *regcache, int n)
{
- return reg_defs[n].size / 8;
+ return register_size (regcache->tdesc, n);
}
static unsigned char *
-register_data (struct regcache *regcache, int n, int fetch)
+register_data (const struct regcache *regcache, int n, int fetch)
{
- return regcache->registers + (reg_defs[n].offset / 8);
+ 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)
+{
+ return regcache->raw_supply (n, buf);
+}
+
+/* See common/common-regcache.h. */
+
+void
+regcache::raw_supply (int n, const void *buf)
{
if (buf)
{
- memcpy (register_data (regcache, n, 0), buf, register_size (n));
+ memcpy (register_data (this, n, 0), buf, register_size (tdesc, n));
#ifndef IN_PROCESS_AGENT
- if (regcache->register_status != NULL)
- regcache->register_status[n] = REG_VALID;
+ if (register_status != NULL)
+ register_status[n] = REG_VALID;
#endif
}
else
{
- memset (register_data (regcache, n, 0), 0, register_size (n));
+ memset (register_data (this, n, 0), 0, register_size (tdesc, n));
#ifndef IN_PROCESS_AGENT
- if (regcache->register_status != NULL)
- regcache->register_status[n] = REG_UNAVAILABLE;
+ if (register_status != NULL)
+ register_status[n] = REG_UNAVAILABLE;
#endif
}
}
void
supply_register_zeroed (struct regcache *regcache, int n)
{
- memset (register_data (regcache, n, 0), 0, register_size (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. */
{
if (buf)
{
- memcpy (regcache->registers, buf, register_bytes);
+ const struct target_desc *tdesc = regcache->tdesc;
+
+ memcpy (regcache->registers, buf, tdesc->registers_size);
#ifndef IN_PROCESS_AGENT
{
int i;
- for (i = 0; i < num_registers; i++)
+ for (i = 0; i < tdesc->reg_defs.size (); i++)
regcache->register_status[i] = REG_VALID;
}
#endif
}
else
{
- memset (regcache->registers, 0, register_bytes);
+ const struct target_desc *tdesc = regcache->tdesc;
+
+ memset (regcache->registers, 0, tdesc->registers_size);
#ifndef IN_PROCESS_AGENT
{
int i;
- for (i = 0; i < num_registers; i++)
+ for (i = 0; i < tdesc->reg_defs.size (); i++)
regcache->register_status[i] = REG_UNAVAILABLE;
}
#endif
supply_register_by_name (struct regcache *regcache,
const char *name, const void *buf)
{
- supply_register (regcache, find_regno (name), 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 (n));
+ regcache->raw_collect (n, buf);
+}
+
+/* See common/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)
{
- convert_int_to_ascii (register_data (regcache, n, 1),
- buf, register_size (n));
+ 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 (name), buf);
+ collect_register (regcache, find_regno (regcache->tdesc, name), buf);
}
/* Special handling for register PC. */
}
#endif
+
+/* See common/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 common/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);
+}
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