gdbserver: remove support for Blackfin

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): Remove linux-bfin-low.c.
	* configure.srv: Remove bfin case.
	* linux-bfin-low.cc: Remove.
	* linux-low.cc: Remove BFIN-conditional code.

Change-Id: I846310d15e6386118ec7eabb1b87e647174560fb

5 files changed, 7 insertions, 184 deletions

diff --git a/gdbserver/ChangeLog b/gdbserver/ChangeLog
index 07cf443354e..e49c8186556 100644
--- a/gdbserver/ChangeLog
+++ b/gdbserver/ChangeLog
@@ -1,5 +1,12 @@
 2020-06-12  Simon Marchi  <simon.marchi@efficios.com>
 
+	* Makefile.in (SFILES): Remove linux-bfin-low.c.
+	* configure.srv: Remove bfin case.
+	* linux-bfin-low.cc: Remove.
+	* linux-low.cc: Remove BFIN-conditional code.
+
+2020-06-12  Simon Marchi  <simon.marchi@efficios.com>
+
 	* configure: Re-generate.
 	* configure.ac: Remove srv_qnx test.
 	* configure.srv: Remove nto case.
diff --git a/gdbserver/Makefile.in b/gdbserver/Makefile.in
index 417a530e25d..58577ca898c 100644
--- a/gdbserver/Makefile.in
+++ b/gdbserver/Makefile.in
@@ -180,7 +180,6 @@ SFILES = \
 	$(srcdir)/inferiors.cc \
 	$(srcdir)/linux-aarch64-low.cc \
 	$(srcdir)/linux-arm-low.cc \
-	$(srcdir)/linux-bfin-low.cc \
 	$(srcdir)/linux-cris-low.cc \
 	$(srcdir)/linux-crisv32-low.cc \
 	$(srcdir)/linux-ia64-low.cc \
diff --git a/gdbserver/configure.srv b/gdbserver/configure.srv
index 0a3bf32dd18..4b4e25a5e5e 100644
--- a/gdbserver/configure.srv
+++ b/gdbserver/configure.srv
@@ -81,11 +81,6 @@ case "${gdbserver_host}" in
 			srv_mingw=yes
 			srv_mingwce=yes
 			;;
-  bfin-*-*linux*)	srv_regobj=reg-bfin.o
-			srv_tgtobj="$srv_linux_obj linux-bfin-low.o"
-			srv_linux_usrregs=yes
-			srv_linux_thread_db=yes
-			;;
   crisv32-*-linux*)	srv_regobj=reg-crisv32.o
 			srv_tgtobj="$srv_linux_obj linux-crisv32-low.o"
 			srv_linux_regsets=yes
diff --git a/gdbserver/linux-bfin-low.cc b/gdbserver/linux-bfin-low.cc
deleted file mode 100644
index 963ccfeda94..00000000000
--- a/gdbserver/linux-bfin-low.cc
+++ /dev/null
@@ -1,173 +0,0 @@
-/* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
-
-   Copyright (C) 2005-2020 Free Software Foundation, Inc.
-
-   Contributed by Analog Devices, 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 <asm/ptrace.h>
-
-/* Linux target op definitions for the BFIN architecture.  */
-
-class bfin_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;
-
-  int low_decr_pc_after_break () override;
-
-  bool low_breakpoint_at (CORE_ADDR pc) override;
-};
-
-/* The singleton target ops object.  */
-
-static bfin_target the_bfin_target;
-
-bool
-bfin_target::low_supports_breakpoints ()
-{
-  return true;
-}
-
-CORE_ADDR
-bfin_target::low_get_pc (regcache *regcache)
-{
-  return linux_get_pc_32bit (regcache);
-}
-
-void
-bfin_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
-{
-  linux_set_pc_32bit (regcache, pc);
-}
-
-int
-bfin_target::low_decr_pc_after_break ()
-{
-  return 2;
-}
-
-/* Defined in auto-generated file reg-bfin.c.  */
-void init_registers_bfin (void);
-extern const struct target_desc *tdesc_bfin;
-
-static int bfin_regmap[] =
-{
-  PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
-  PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP,
-  PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3,
-  PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3,
-  PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS,
-  PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1,
-  -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
-  -1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE,
-  PT_PC,
-};
-
-#define bfin_num_regs ARRAY_SIZE (bfin_regmap)
-
-bool
-bfin_target::low_cannot_store_register (int regno)
-{
-  return (regno >= bfin_num_regs);
-}
-
-bool
-bfin_target::low_cannot_fetch_register (int regno)
-{
-  return (regno >= bfin_num_regs);
-}
-
-#define bfin_breakpoint_len 2
-static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00};
-
-/* Implementation of target ops method "sw_breakpoint_from_kind".  */
-
-const gdb_byte *
-bfin_target::sw_breakpoint_from_kind (int kind, int *size)
-{
-  *size = bfin_breakpoint_len;
-  return bfin_breakpoint;
-}
-
-bool
-bfin_target::low_breakpoint_at (CORE_ADDR where)
-{
-  unsigned char insn[bfin_breakpoint_len];
-
-  read_inferior_memory(where, insn, bfin_breakpoint_len);
-  if (insn[0] == bfin_breakpoint[0]
-      && insn[1] == bfin_breakpoint[1])
-    return true;
-
-  /* If necessary, recognize more trap instructions here.  GDB only uses the
-     one.  */
-  return false;
-}
-
-void
-bfin_target::low_arch_setup ()
-{
-  current_process ()->tdesc = tdesc_bfin;
-}
-
-static struct usrregs_info bfin_usrregs_info =
-  {
-    bfin_num_regs,
-    bfin_regmap,
-  };
-
-static struct regs_info myregs_info =
-  {
-    NULL, /* regset_bitmap */
-    &bfin_usrregs_info,
-  };
-
-const regs_info *
-bfin_target::get_regs_info ()
-{
-  return &myregs_info;
-}
-
-/* The linux target ops object.  */
-
-linux_process_target *the_linux_target = &the_bfin_target;
-
-void
-initialize_low_arch (void)
-{
-  init_registers_bfin ();
-}
diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc
index 8ba39252c0f..bde6c767e87 100644
--- a/gdbserver/linux-low.cc
+++ b/gdbserver/linux-low.cc
@@ -86,11 +86,6 @@
 #define PT_TEXT_ADDR 49*4
 #define PT_DATA_ADDR 50*4
 #define PT_TEXT_END_ADDR  51*4
-/* BFIN already defines these since at least 2.6.32 kernels.  */
-#elif defined(BFIN)
-#define PT_TEXT_ADDR 220
-#define PT_TEXT_END_ADDR 224
-#define PT_DATA_ADDR 228
 /* These are still undefined in 3.10 kernels.  */
 #elif defined(__TMS320C6X__)
 #define PT_TEXT_ADDR     (0x10000*4)