[PATCH 6/7] gdbserver: remove support for Tile

[Simon Marchi <simon.marchi@efficios.com>]

This port has been unmaintained for years and the upstream Linux kernel
does not support this architecture anymore, remove it.

gdbserver/ChangeLog:

	* Makefile.in (SFILES): linux-tile-low.cc.
	* configure.srv: Remove tilegx case.
	* linux-tile-low.cc: Remove.
---
 gdbserver/Makefile.in       |   1 -
 gdbserver/configure.srv     |   6 -
 gdbserver/linux-tile-low.cc | 227 ------------------------------------
 3 files changed, 234 deletions(-)
 delete mode 100644 gdbserver/linux-tile-low.cc

diff --git a/gdbserver/Makefile.in b/gdbserver/Makefile.in
index 80cc12e58603..cc5fa427c933 100644
--- a/gdbserver/Makefile.in
+++ b/gdbserver/Makefile.in
@@ -190,7 +190,6 @@ SFILES = \
 	$(srcdir)/linux-s390-low.cc \
 	$(srcdir)/linux-sh-low.cc \
 	$(srcdir)/linux-sparc-low.cc \
-	$(srcdir)/linux-tile-low.cc \
 	$(srcdir)/linux-x86-low.cc \
 	$(srcdir)/linux-xtensa-low.cc \
 	$(srcdir)/mem-break.cc \
diff --git a/gdbserver/configure.srv b/gdbserver/configure.srv
index 76d2b8e7e025..b376cb13449c 100644
--- a/gdbserver/configure.srv
+++ b/gdbserver/configure.srv
@@ -375,12 +375,6 @@ case "${gdbserver_host}" in
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
 			;;
-  tilegx-*-linux*)	srv_regobj=reg-tilegx.o
-			srv_regobj="${srv_regobj} reg-tilegx32.o"
-			srv_tgtobj="$srv_linux_obj linux-tile-low.o"
-			srv_linux_regsets=yes
-			srv_linux_thread_db=yes
-			;;
   *)
 			# Who are you?
 			UNSUPPORTED=1
diff --git a/gdbserver/linux-tile-low.cc b/gdbserver/linux-tile-low.cc
deleted file mode 100644
index fa24b0899c02..000000000000
--- a/gdbserver/linux-tile-low.cc
+++ /dev/null
@@ -1,227 +0,0 @@
-/* GNU/Linux/TILE-Gx specific low level interface, GDBserver.
-
-   Copyright (C) 2012-2020 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/>.  */
-
-#include "server.h"
-#include "linux-low.h"
-
-#include <arch/abi.h>
-#include "nat/gdb_ptrace.h"
-
-/* Linux target op definitions for the TILE-Gx architecture.  */
-
-class tile_target : public linux_process_target
-{
-public:
-
-  const regs_info *get_regs_info () override;
-
-  const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;
-
-protected:
-
-  void low_arch_setup () override;
-
-  bool low_cannot_fetch_register (int regno) override;
-
-  bool low_cannot_store_register (int regno) override;
-
-  bool low_supports_breakpoints () override;
-
-  CORE_ADDR low_get_pc (regcache *regcache) override;
-
-  void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
-
-  bool low_breakpoint_at (CORE_ADDR pc) override;
-};
-
-/* The singleton target ops object.  */
-
-static tile_target the_tile_target;
-
-bool
-tile_target::low_supports_breakpoints ()
-{
-  return true;
-}
-
-CORE_ADDR
-tile_target::low_get_pc (regcache *regcache)
-{
-  return linux_get_pc_64bit (regcache);
-}
-
-void
-tile_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
-{
-  linux_set_pc_64bit (regcache, pc);
-}
-
-/* Defined in auto-generated file reg-tilegx.c.  */
-void init_registers_tilegx (void);
-extern const struct target_desc *tdesc_tilegx;
-
-/* Defined in auto-generated file reg-tilegx32.c.  */
-void init_registers_tilegx32 (void);
-extern const struct target_desc *tdesc_tilegx32;
-
-#define tile_num_regs 65
-
-static int tile_regmap[] =
-{
-   0,  1,  2,  3,  4,  5,  6,  7,
-   8,  9, 10, 11, 12, 13, 14, 15,
-  16, 17, 18, 19, 20, 21, 22, 23,
-  24, 25, 26, 27, 28, 29, 30, 31,
-  32, 33, 34, 35, 36, 37, 38, 39,
-  40, 41, 42, 43, 44, 45, 46, 47,
-  48, 49, 50, 51, 52, 53, 54, 55,
-  -1, -1, -1, -1, -1, -1, -1, -1,
-  56
-};
-
-bool
-tile_target::low_cannot_fetch_register (int regno)
-{
-  if (regno >= 0 && regno < 56)
-    return false;
-  else if (regno == 64)
-    return false;
-  else
-    return true;
-}
-
-bool
-tile_target::low_cannot_store_register (int regno)
-{
-  if (regno >= 0 && regno < 56)
-    return false;
-  else if (regno == 64)
-    return false;
-  else
-    return true;
-}
-
-static uint64_t tile_breakpoint = 0x400b3cae70166000ULL;
-#define tile_breakpoint_len 8
-
-/* Implementation of target ops method "sw_breakpoint_from_kind".  */
-
-const gdb_byte *
-tile_target::sw_breakpoint_from_kind (int kind, int *size)
-{
-  *size = tile_breakpoint_len;
-  return (const gdb_byte *) &tile_breakpoint;
-}
-
-bool
-tile_target::low_breakpoint_at (CORE_ADDR where)
-{
-  uint64_t insn;
-
-  read_memory (where, (unsigned char *) &insn, 8);
-  if (insn == tile_breakpoint)
-    return true;
-
-  /* If necessary, recognize more trap instructions here.  GDB only uses the
-     one.  */
-  return false;
-}
-
-static void
-tile_fill_gregset (struct regcache *regcache, void *buf)
-{
-  int i;
-
-  for (i = 0; i < tile_num_regs; i++)
-    if (tile_regmap[i] != -1)
-      collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
-}
-
-static void
-tile_store_gregset (struct regcache *regcache, const void *buf)
-{
-  int i;
-
-  for (i = 0; i < tile_num_regs; i++)
-    if (tile_regmap[i] != -1)
-      supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
-}
-
-static struct regset_info tile_regsets[] =
-{
-  { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8,
-    GENERAL_REGS, tile_fill_gregset, tile_store_gregset },
-  NULL_REGSET
-};
-
-static struct regsets_info tile_regsets_info =
-  {
-    tile_regsets, /* regsets */
-    0, /* num_regsets */
-    NULL, /* disabled_regsets */
-  };
-
-static struct usrregs_info tile_usrregs_info =
-  {
-    tile_num_regs,
-    tile_regmap,
-  };
-
-static struct regs_info myregs_info =
-  {
-    NULL, /* regset_bitmap */
-    &tile_usrregs_info,
-    &tile_regsets_info,
-  };
-
-const regs_info *
-tile_target::get_regs_info ()
-{
-  return &myregs_info;
-}
-
-void
-tile_target::low_arch_setup ()
-{
-  int pid = pid_of (current_thread);
-  unsigned int machine;
-  int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine);
-
-  if (sizeof (void *) == 4)
-    if (is_elf64 > 0)
-      error (_("Can't debug 64-bit process with 32-bit GDBserver"));
-
-  if (!is_elf64)
-    current_process ()->tdesc = tdesc_tilegx32;
-  else
-    current_process ()->tdesc = tdesc_tilegx;
-}
-
-/* The linux target ops object.  */
-
-linux_process_target *the_linux_target = &the_tile_target;
-
-void
-initialize_low_arch (void)
-{
-  init_registers_tilegx32();
-  init_registers_tilegx();
-
-  initialize_regsets_info (&tile_regsets_info);
-}
-- 
2.26.2