gdbserver: rename source files to .cc

For the same reasons outlined in the previous patch, this patch renames
gdbserver source files to .cc.

I have moved the "-x c++" switch to only those rules that require it.

gdbserver/ChangeLog:

	* Makefile.in: Rename source files from .c to .cc.
	* %.c: Rename to %.cc.
	* configure.ac: Rename server.c to server.cc.
	* configure: Re-generate.

gdbserver/proc-service.cc

@@ -0,0 +1,165 @@
+/* libthread_db helper functions for the remote server for GDB.
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
+
+   Contributed by MontaVista Software.
+
+   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"
+
+/* This file is currently tied to GNU/Linux.  It should scale well to
+   another libthread_db implementation, with the appropriate gdbserver
+   hooks, but for now this means we can use GNU/Linux's target data.  */
+
+#include "linux-low.h"
+
+#include "gdb_proc_service.h"
+
+typedef struct ps_prochandle *gdb_ps_prochandle_t;
+typedef void *gdb_ps_read_buf_t;
+typedef const void *gdb_ps_write_buf_t;
+typedef size_t gdb_ps_size_t;
+
+#ifdef HAVE_LINUX_REGSETS
+#define HAVE_REGSETS
+#endif
+
+#ifdef HAVE_REGSETS
+static struct regset_info *
+gregset_info (void)
+{
+  int i = 0;
+  const struct regs_info *regs_info = (*the_low_target.regs_info) ();
+  struct regsets_info *regsets_info = regs_info->regsets_info;
+
+  while (regsets_info->regsets[i].size != -1)
+    {
+      if (regsets_info->regsets[i].type == GENERAL_REGS)
+	break;
+      i++;
+    }
+
+  return &regsets_info->regsets[i];
+}
+#endif
+
+/* Search for the symbol named NAME within the object named OBJ within
+   the target process PH.  If the symbol is found the address of the
+   symbol is stored in SYM_ADDR.  */
+
+ps_err_e
+ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
+		   const char *name, psaddr_t *sym_addr)
+{
+  CORE_ADDR addr;
+
+  if (thread_db_look_up_one_symbol (name, &addr) == 0)
+    return PS_NOSYM;
+
+  *sym_addr = (psaddr_t) (unsigned long) addr;
+  return PS_OK;
+}
+
+/* Read SIZE bytes from the target process PH at address ADDR and copy
+   them into BUF.  */
+
+ps_err_e
+ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
+	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
+{
+  if (read_inferior_memory ((uintptr_t) addr, (gdb_byte *) buf, size) != 0)
+    return PS_ERR;
+  return PS_OK;
+}
+
+/* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
+
+ps_err_e
+ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
+	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
+{
+  if (target_write_memory ((uintptr_t) addr, (const gdb_byte *) buf, size)
+      != 0)
+    return PS_ERR;
+  return PS_OK;
+}
+
+/* Get the general registers of LWP LWPID within the target process PH
+   and store them in GREGSET.  */
+
+ps_err_e
+ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
+{
+#ifdef HAVE_REGSETS
+  struct lwp_info *lwp;
+  struct thread_info *reg_thread, *saved_thread;
+  struct regcache *regcache;
+
+  lwp = find_lwp_pid (ptid_t (lwpid));
+  if (lwp == NULL)
+    return PS_ERR;
+
+  reg_thread = get_lwp_thread (lwp);
+  saved_thread = current_thread;
+  current_thread = reg_thread;
+  regcache = get_thread_regcache (current_thread, 1);
+  gregset_info ()->fill_function (regcache, gregset);
+
+  current_thread = saved_thread;
+  return PS_OK;
+#else
+  return PS_ERR;
+#endif
+}
+
+/* Set the general registers of LWP LWPID within the target process PH
+   from GREGSET.  */
+
+ps_err_e
+ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
+{
+  /* Unneeded.  */
+  return PS_ERR;
+}
+
+/* Get the floating-point registers of LWP LWPID within the target
+   process PH and store them in FPREGSET.  */
+
+ps_err_e
+ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prfpregset_t *fpregset)
+{
+  /* Unneeded.  */
+  return PS_ERR;
+}
+
+/* Set the floating-point registers of LWP LWPID within the target
+   process PH from FPREGSET.  */
+
+ps_err_e
+ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prfpregset_t *fpregset)
+{
+  /* Unneeded.  */
+  return PS_ERR;
+}
+
+/* Return overall process id of the target PH.  Special for GNU/Linux
+   -- not used on Solaris.  */
+
+pid_t
+ps_getpid (gdb_ps_prochandle_t ph)
+{
+  return pid_of (current_thread);
+}