Move gdbserver to top level

This patch moves gdbserver to the top level.

This patch is as close to a pure move as possible -- gdbserver still
builds its own variant of gnulib and gdbsupport.  Changing this will
be done in a separate patch.

[v2] Note that, per Simon's review comment, this patch changes the
tree so that gdbserver is not built for or1k or score.  This makes
sense, because there is apparently not actually a gdbserver port here.

[v3] This version of the patch also splits out some configury into a
new file, gdbserver/configure.host, so that the top-level configure
script can simply rely on it in order to decide whether gdbserver
should be built.

[v4] This version adds documentation and removes some unnecessary
top-level dependencies.

[v5] Update docs to mention "make all-gdbserver" and change how
top-level configure decides whether to build gdbserver, switching to a
single, shared script.

Tested by the buildbot.

ChangeLog
2020-02-07  Tom Tromey  <tom@tromey.com>
	    Pedro Alves  <palves@redhat.com>

	* src-release.sh (GDB_SUPPORT_DIRS): Add gdbserver.
	* gdbserver: New directory, moved from gdb/gdbserver.
	* configure.ac (host_tools): Add gdbserver.
	Only build gdbserver on certain systems.
	* Makefile.in, configure: Rebuild.
	* Makefile.def (host_modules, dependencies): Add gdbserver.
	* MAINTAINERS: Add gdbserver.

gdb/ChangeLog
2020-02-07  Tom Tromey  <tom@tromey.com>

	* README: Update gdbserver documentation.
	* gdbserver: Move to top level.
	* configure.tgt (build_gdbserver): Remove.
	* configure.ac: Remove --enable-gdbserver.
	* configure: Rebuild.
	* Makefile.in (distclean): Don't mention gdbserver.

Change-Id: I826b7565b54604711dc7a11edea0499cd51ff39e

1 files changed, 70 insertions, 0 deletions

diff --git a/gdbserver/remote-utils.h b/gdbserver/remote-utils.h
new file mode 100644
index 0000000..1b31456
--- /dev/null
+++ b/gdbserver/remote-utils.h
@@ -0,0 +1,70 @@
+/* Remote utility routines for the remote server for GDB.
+   Copyright (C) 1993-2020 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/>.  */
+
+#ifndef GDBSERVER_REMOTE_UTILS_H
+#define GDBSERVER_REMOTE_UTILS_H
+
+int gdb_connected (void);
+
+#define STDIO_CONNECTION_NAME "stdio"
+int remote_connection_is_stdio (void);
+
+ptid_t read_ptid (const char *buf, const char **obuf);
+char *write_ptid (char *buf, ptid_t ptid);
+
+int putpkt (char *buf);
+int putpkt_binary (char *buf, int len);
+int putpkt_notif (char *buf);
+int getpkt (char *buf);
+void remote_prepare (const char *name);
+void remote_open (const char *name);
+void remote_close (void);
+void write_ok (char *buf);
+void write_enn (char *buf);
+void initialize_async_io (void);
+void enable_async_io (void);
+void disable_async_io (void);
+void check_remote_input_interrupt_request (void);
+void prepare_resume_reply (char *buf, ptid_t ptid,
+			   struct target_waitstatus *status);
+
+const char *decode_address_to_semicolon (CORE_ADDR *addrp, const char *start);
+void decode_address (CORE_ADDR *addrp, const char *start, int len);
+void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr,
+		      unsigned int *len_ptr);
+void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
+		      unsigned int *len_ptr, unsigned char **to_p);
+int decode_X_packet (char *from, int packet_len, CORE_ADDR * mem_addr_ptr,
+		     unsigned int *len_ptr, unsigned char **to_p);
+int decode_xfer_write (char *buf, int packet_len,
+		       CORE_ADDR *offset, unsigned int *len,
+		       unsigned char *data);
+int decode_search_memory_packet (const char *buf, int packet_len,
+				 CORE_ADDR *start_addrp,
+				 CORE_ADDR *search_space_lenp,
+				 gdb_byte *pattern,
+				 unsigned int *pattern_lenp);
+
+void clear_symbol_cache (struct sym_cache **symcache_p);
+int look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb);
+
+int relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc);
+
+void monitor_output (const char *msg);
+
+#endif /* GDBSERVER_REMOTE_UTILS_H */