gdb: Remove OpenBSD/m88k support

Support for m88k was fully removed from bfd, which broke gdb
--enable-targets=all builds:

  > gdb/m88k-tdep.c: In function void _initialize_m88k_tdep():
  > gdb/m88k-tdep.c:867:21: error: bfd_arch_m88k was not declared in this scope
  >    gdbarch_register (bfd_arch_m88k, m88k_gdbarch_init, NULL);

There's no point in keeping GDB support for OpenBSD/m88k with no bfd
support, so this commit simply removes the port.

gdb/ChangeLog:
2018-04-16  Pedro Alves  <palves@redhat.com>

	* MAINTAINERS: Remove m88k.
	* Makefile.in (ALL_TARGET_OBS): Remove m88k-tdep.o.
	(HFILES_NO_SRCDIR): Remove m88k-tdep.h.
	(ALLDEPFILES): Remove m88k-bsd-nat.c and m88k-tdep.c.
	* NEWS: Mention that support for OpenBSD/m88k was removed.
	* configure.host (m88*-*-*): Remove support.
	* configure.nat (m88k-*-*): Remove support.
	* configure.tgt (m88*-*-openbsd*): Remove.
	* m88k-bsd-nat.c, m88k-tdep.c, m88k-tdep.h: Delete.

10 files changed, 16 insertions, 1038 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b672052..16adbd2 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,15 @@
+2018-04-16  Pedro Alves  <palves@redhat.com>
+
+	* MAINTAINERS: Remove m88k.
+	* Makefile.in (ALL_TARGET_OBS): Remove m88k-tdep.o.
+	(HFILES_NO_SRCDIR): Remove m88k-tdep.h.
+	(ALLDEPFILES): Remove m88k-bsd-nat.c and m88k-tdep.c.
+	* NEWS: Mention that support for m88k was removed.
+	* configure.host (m88*-*-*): Remove support.
+	* configure.nat (m88k-*-*): Remove support.
+	* configure.tgt (m88*-*-openbsd*): Remove.
+	* m88k-bsd-nat.c, m88k-tdep.c, m88k-tdep.h: Delete.
+
 2018-04-15  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* configure.tgt (x86_tobjs): New variable.
diff --git a/gdb/MAINTAINERS b/gdb/MAINTAINERS
index 74fb574..816c806 100644
--- a/gdb/MAINTAINERS
+++ b/gdb/MAINTAINERS
@@ -261,8 +261,6 @@ the native maintainer when resolving ABI issues.
 	m68hc11		--target=m68hc11-elf ,-Werror ,
 	m68k		--target=m68k-elf ,-Werror
 
-	m88k		--target=m88k-openbsd ,-Werror
-
 	mcore		Deleted
 
 	mep		--target=mep-elf ,-Werror
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 40c9f89..5566a66 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -729,7 +729,6 @@ ALL_TARGET_OBS = \
 	m68k-bsd-tdep.o \
 	m68k-linux-tdep.o \
 	m68k-tdep.o \
-	m88k-tdep.o \
 	mep-tdep.o \
 	microblaze-linux-tdep.o \
 	microblaze-tdep.o \
@@ -1291,7 +1290,6 @@ HFILES_NO_SRCDIR = \
 	m2-lang.h \
 	m32r-tdep.h \
 	m68k-tdep.h \
-	m88k-tdep.h \
 	macroexp.h \
 	macroscope.h \
 	macrotab.h \
@@ -2271,8 +2269,6 @@ ALLDEPFILES = \
 	m68k-linux-nat.c \
 	m68k-linux-tdep.c \
 	m68k-tdep.c \
-	m88k-bsd-nat.c \
-	m88k-tdep.c \
 	microblaze-linux-tdep.c \
 	microblaze-tdep.c \
 	mingw-hdep.c \
diff --git a/gdb/NEWS b/gdb/NEWS
index 1ab1145..305e1c0 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -28,6 +28,10 @@ set|show record btrace cpu
 
 RiscV ELF			riscv*-*-elf
 
+* Removed targets and native configurations
+
+m88k running OpenBSD  		m88*-*-openbsd*
+
 *** Changes in GDB 8.1
 
 * GDB now supports dynamically creating arbitrary register groups specified
diff --git a/gdb/configure.host b/gdb/configure.host
index 8e31834..6bcb8da 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -64,7 +64,6 @@ arm*)			gdb_host_cpu=arm ;;
 hppa*)			gdb_host_cpu=pa ;;
 i[34567]86*)		gdb_host_cpu=i386 ;;
 m68*)			gdb_host_cpu=m68k ;;
-m88*)			gdb_host_cpu=m88k ;;
 mips*)			gdb_host_cpu=mips ;;
 powerpc* | rs6000)	gdb_host_cpu=powerpc ;;
 sparcv9 | sparc64)	gdb_host_cpu=sparc ;;
diff --git a/gdb/configure.nat b/gdb/configure.nat
index 8e14892..2cd9c4f 100644
--- a/gdb/configure.nat
+++ b/gdb/configure.nat
@@ -410,10 +410,6 @@ case ${gdb_host} in
 		NATDEPFILES="${NATDEPFILES} m68k-bsd-nat.o bsd-kvm.o"
 		LOADLIBES='-lkvm'
 		;;
-	    m88k)
-		# Host: OpenBSD/m88k
-		NATDEPFILES="${NATDEPFILES} m88k-bsd-nat.o"
-		;;
 	    pa)
 		# Host: OpenBSD/hppa
 		NATDEPFILES="${NATDEPFILES} obsd-nat.o hppa-obsd-nat.o"
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index b252809..6178754 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -373,11 +373,6 @@ m68*-*-openbsd*)
 	gdb_target_obs="m68k-tdep.o m68k-bsd-tdep.o"
 	;;
 
-m88*-*-openbsd*)
-	# Target: OpenBSD/m88k
-	gdb_target_obs="m88k-tdep.o"
-	;;
-
 mep-*-*)
 	# Target: Toshiba Media Processor (MEP)
 	gdb_target_obs="mep-tdep.o"
diff --git a/gdb/m88k-bsd-nat.c b/gdb/m88k-bsd-nat.c
deleted file mode 100644
index ff9c5a2..0000000
--- a/gdb/m88k-bsd-nat.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/* Native-dependent code for Motorola 88000 BSD's.
-
-   Copyright (C) 2004-2018 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 "defs.h"
-#include "inferior.h"
-#include "regcache.h"
-#include "target.h"
-
-#include <sys/types.h>
-#include <sys/ptrace.h>
-#include <machine/reg.h>
-
-#include "m88k-tdep.h"
-#include "inf-ptrace.h"
-
-/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
-
-static void
-m88kbsd_supply_gregset (struct regcache *regcache, const void *gregs)
-{
-  const char *regs = gregs;
-  int regnum;
-
-  for (regnum = 0; regnum < M88K_NUM_REGS; regnum++)
-    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
-}
-
-/* Collect the general-purpose registers from REGCACHE and store them
-   in GREGS.  */
-
-static void
-m88kbsd_collect_gregset (const struct regcache *regcache,
-			 void *gregs, int regnum)
-{
-  char *regs = gregs;
-  int i;
-
-  for (i = 0; i < M88K_NUM_REGS; i++)
-    {
-      if (regnum == -1 || regnum == i)
-	regcache_raw_collect (regcache, i, regs + i * 4);
-    }
-}
-
-
-/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
-   for all registers.  */
-
-static void
-m88kbsd_fetch_inferior_registers (struct target_ops *ops,
-				  struct regcache *regcache, int regnum)
-{
-  struct reg regs;
-
-  if (ptrace (PT_GETREGS, ptid_get_pid (regcache_get_ptid (regcache)),
-	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
-    perror_with_name (_("Couldn't get registers"));
-
-  m88kbsd_supply_gregset (regcache, &regs);
-}
-
-/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
-   this for all registers.  */
-
-static void
-m88kbsd_store_inferior_registers (struct target_ops *ops,
-				  struct regcache *regcache, int regnum)
-{
-  struct reg regs;
-
-  if (ptrace (PT_GETREGS, ptid_get_pid (regcache_get_ptid (regcache)),
-	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
-    perror_with_name (_("Couldn't get registers"));
-
-  m88kbsd_collect_gregset (regcache, &regs, regnum);
-
-  if (ptrace (PT_SETREGS, ptid_get_pid (regcache_get_ptid (regcache)),
-	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
-    perror_with_name (_("Couldn't write registers"));
-}
-
-void
-_initialize_m88kbsd_nat (void)
-{
-  struct target_ops *t;
-
-  t = inf_ptrace_target ();
-  t->to_fetch_registers = m88kbsd_fetch_inferior_registers;
-  t->to_store_registers = m88kbsd_store_inferior_registers;
-  add_target (t);
-}
diff --git a/gdb/m88k-tdep.c b/gdb/m88k-tdep.c
deleted file mode 100644
index dd84350..0000000
--- a/gdb/m88k-tdep.c
+++ /dev/null
@@ -1,868 +0,0 @@
-/* Target-dependent code for the Motorola 88000 series.
-
-   Copyright (C) 2004-2018 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 "defs.h"
-#include "arch-utils.h"
-#include "dis-asm.h"
-#include "frame.h"
-#include "frame-base.h"
-#include "frame-unwind.h"
-#include "gdbcore.h"
-#include "gdbtypes.h"
-#include "regcache.h"
-#include "regset.h"
-#include "symtab.h"
-#include "trad-frame.h"
-#include "value.h"
-#include <algorithm>
-
-#include "m88k-tdep.h"
-
-/* Fetch the instruction at PC.  */
-
-static unsigned long
-m88k_fetch_instruction (CORE_ADDR pc, enum bfd_endian byte_order)
-{
-  return read_memory_unsigned_integer (pc, 4, byte_order);
-}
-
-/* Register information.  */
-
-/* Return the name of register REGNUM.  */
-
-static const char *
-m88k_register_name (struct gdbarch *gdbarch, int regnum)
-{
-  static const char *register_names[] =
-  {
-    "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
-    "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
-    "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
-    "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
-    "epsr", "fpsr", "fpcr", "sxip", "snip", "sfip"
-  };
-
-  if (regnum >= 0 && regnum < ARRAY_SIZE (register_names))
-    return register_names[regnum];
-
-  return NULL;
-}
-
-/* Return the GDB type object for the "standard" data type of data in
-   register REGNUM.  */
-
-static struct type *
-m88k_register_type (struct gdbarch *gdbarch, int regnum)
-{
-  /* SXIP, SNIP, SFIP and R1 contain code addresses.  */
-  if ((regnum >= M88K_SXIP_REGNUM && regnum <= M88K_SFIP_REGNUM)
-      || regnum == M88K_R1_REGNUM)
-    return builtin_type (gdbarch)->builtin_func_ptr;
-
-  /* R30 and R31 typically contains data addresses.  */
-  if (regnum == M88K_R30_REGNUM || regnum == M88K_R31_REGNUM)
-    return builtin_type (gdbarch)->builtin_data_ptr;
-
-  return builtin_type (gdbarch)->builtin_int32;
-}
-
-
-static CORE_ADDR
-m88k_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr)
-{
-  /* All instructures are 4-byte aligned.  The lower 2 bits of SXIP,
-     SNIP and SFIP are used for special purposes: bit 0 is the
-     exception bit and bit 1 is the valid bit.  */
-  return addr & ~0x3;
-}
-
-/* Use the program counter to determine the contents and size of a
-   breakpoint instruction.  Return a pointer to a string of bytes that
-   encode a breakpoint instruction, store the length of the string in
-   *LEN and optionally adjust *PC to point to the correct memory
-   location for inserting the breakpoint.  */
-
-/* tb 0,r0,511 */
-constexpr gdb_byte m88k_break_insn[] = { 0xf0, 0x00, 0xd1, 0xff };
-
-typedef BP_MANIPULATION (m88k_break_insn) m88k_breakpoint;
-
-static CORE_ADDR
-m88k_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  CORE_ADDR pc;
-
-  pc = frame_unwind_register_unsigned (next_frame, M88K_SXIP_REGNUM);
-  return m88k_addr_bits_remove (gdbarch, pc);
-}
-
-static void
-m88k_write_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  /* According to the MC88100 RISC Microprocessor User's Manual,
-     section 6.4.3.1.2:
-
-     "... can be made to return to a particular instruction by placing
-     a valid instruction address in the SNIP and the next sequential
-     instruction address in the SFIP (with V bits set and E bits
-     clear).  The rte resumes execution at the instruction pointed to
-     by the SNIP, then the SFIP."
-
-     The E bit is the least significant bit (bit 0).  The V (valid)
-     bit is bit 1.  This is why we logical or 2 into the values we are
-     writing below.  It turns out that SXIP plays no role when
-     returning from an exception so nothing special has to be done
-     with it.  We could even (presumably) give it a totally bogus
-     value.  */
-
-  regcache_cooked_write_unsigned (regcache, M88K_SXIP_REGNUM, pc);
-  regcache_cooked_write_unsigned (regcache, M88K_SNIP_REGNUM, pc | 2);
-  regcache_cooked_write_unsigned (regcache, M88K_SFIP_REGNUM, (pc + 4) | 2);
-}
-
-
-/* The functions on this page are intended to be used to classify
-   function arguments.  */
-
-/* Check whether TYPE is "Integral or Pointer".  */
-
-static int
-m88k_integral_or_pointer_p (const struct type *type)
-{
-  switch (TYPE_CODE (type))
-    {
-    case TYPE_CODE_INT:
-    case TYPE_CODE_BOOL:
-    case TYPE_CODE_CHAR:
-    case TYPE_CODE_ENUM:
-    case TYPE_CODE_RANGE:
-      {
-	/* We have byte, half-word, word and extended-word/doubleword
-           integral types.  */
-	int len = TYPE_LENGTH (type);
-	return (len == 1 || len == 2 || len == 4 || len == 8);
-      }
-      return 1;
-    case TYPE_CODE_PTR:
-    case TYPE_CODE_REF:
-    case TYPE_CODE_RVALUE_REF:
-      {
-	/* Allow only 32-bit pointers.  */
-	return (TYPE_LENGTH (type) == 4);
-      }
-      return 1;
-    default:
-      break;
-    }
-
-  return 0;
-}
-
-/* Check whether TYPE is "Floating".  */
-
-static int
-m88k_floating_p (const struct type *type)
-{
-  switch (TYPE_CODE (type))
-    {
-    case TYPE_CODE_FLT:
-      {
-	int len = TYPE_LENGTH (type);
-	return (len == 4 || len == 8);
-      }
-    default:
-      break;
-    }
-
-  return 0;
-}
-
-/* Check whether TYPE is "Structure or Union".  */
-
-static int
-m88k_structure_or_union_p (const struct type *type)
-{
-  switch (TYPE_CODE (type))
-    {
-    case TYPE_CODE_STRUCT:
-    case TYPE_CODE_UNION:
-      return 1;
-    default:
-      break;
-    }
-
-  return 0;
-}
-
-/* Check whether TYPE has 8-byte alignment.  */
-
-static int
-m88k_8_byte_align_p (struct type *type)
-{
-  if (m88k_structure_or_union_p (type))
-    {
-      int i;
-
-      for (i = 0; i < TYPE_NFIELDS (type); i++)
-	{
-	  struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, i));
-
-	  if (m88k_8_byte_align_p (subtype))
-	    return 1;
-	}
-    }
-
-  if (m88k_integral_or_pointer_p (type) || m88k_floating_p (type))
-    return (TYPE_LENGTH (type) == 8);
-
-  return 0;
-}
-
-/* Check whether TYPE can be passed in a register.  */
-
-static int
-m88k_in_register_p (struct type *type)
-{
-  if (m88k_integral_or_pointer_p (type) || m88k_floating_p (type))
-    return 1;
-
-  if (m88k_structure_or_union_p (type) && TYPE_LENGTH (type) == 4)
-    return 1;
-
-  return 0;
-}
-
-static CORE_ADDR
-m88k_store_arguments (struct regcache *regcache, int nargs,
-		      struct value **args, CORE_ADDR sp)
-{
-  struct gdbarch *gdbarch = regcache->arch ();
-  int num_register_words = 0;
-  int num_stack_words = 0;
-  int i;
-
-  for (i = 0; i < nargs; i++)
-    {
-      struct type *type = value_type (args[i]);
-      int len = TYPE_LENGTH (type);
-
-      if (m88k_integral_or_pointer_p (type) && len < 4)
-	{
-	  args[i] = value_cast (builtin_type (gdbarch)->builtin_int32,
-				args[i]);
-	  type = value_type (args[i]);
-	  len = TYPE_LENGTH (type);
-	}
-
-      if (m88k_in_register_p (type))
-	{
-	  int num_words = 0;
-
-	  if (num_register_words % 2 == 1 && m88k_8_byte_align_p (type))
-	    num_words++;
-
-	  num_words += ((len + 3) / 4);
-	  if (num_register_words + num_words <= 8)
-	    {
-	      num_register_words += num_words;
-	      continue;
-	    }
-
-	  /* We've run out of available registers.  Pass the argument
-             on the stack.  */
-	}
-
-      if (num_stack_words % 2 == 1 && m88k_8_byte_align_p (type))
-	num_stack_words++;
-
-      num_stack_words += ((len + 3) / 4);
-    }
-
-  /* Allocate stack space.  */
-  sp = align_down (sp - 32 - num_stack_words * 4, 16);
-  num_stack_words = num_register_words = 0;
-
-  for (i = 0; i < nargs; i++)
-    {
-      const bfd_byte *valbuf = value_contents (args[i]);
-      struct type *type = value_type (args[i]);
-      int len = TYPE_LENGTH (type);
-      int stack_word = num_stack_words;
-
-      if (m88k_in_register_p (type))
-	{
-	  int register_word = num_register_words;
-
-	  if (register_word % 2 == 1 && m88k_8_byte_align_p (type))
-	    register_word++;
-
-	  gdb_assert (len == 4 || len == 8);
-
-	  if (register_word + len / 8 < 8)
-	    {
-	      int regnum = M88K_R2_REGNUM + register_word;
-
-	      regcache_raw_write (regcache, regnum, valbuf);
-	      if (len > 4)
-		regcache_raw_write (regcache, regnum + 1, valbuf + 4);
-
-	      num_register_words = (register_word + len / 4);
-	      continue;
-	    }
-	}
-
-      if (stack_word % 2 == -1 && m88k_8_byte_align_p (type))
-	stack_word++;
-
-      write_memory (sp + stack_word * 4, valbuf, len);
-      num_stack_words = (stack_word + (len + 3) / 4);
-    }
-
-  return sp;
-}
-
-static CORE_ADDR
-m88k_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
-		      struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
-		      struct value **args, CORE_ADDR sp, int struct_return,
-		      CORE_ADDR struct_addr)
-{
-  /* Set up the function arguments.  */
-  sp = m88k_store_arguments (regcache, nargs, args, sp);
-  gdb_assert (sp % 16 == 0);
-
-  /* Store return value address.  */
-  if (struct_return)
-    regcache_raw_write_unsigned (regcache, M88K_R12_REGNUM, struct_addr);
-
-  /* Store the stack pointer and return address in the appropriate
-     registers.  */
-  regcache_raw_write_unsigned (regcache, M88K_R31_REGNUM, sp);
-  regcache_raw_write_unsigned (regcache, M88K_R1_REGNUM, bp_addr);
-
-  /* Return the stack pointer.  */
-  return sp;
-}
-
-static struct frame_id
-m88k_dummy_id (struct gdbarch *arch, struct frame_info *this_frame)
-{
-  CORE_ADDR sp;
-
-  sp = get_frame_register_unsigned (this_frame, M88K_R31_REGNUM);
-  return frame_id_build (sp, get_frame_pc (this_frame));
-}
-
-
-/* Determine, for architecture GDBARCH, how a return value of TYPE
-   should be returned.  If it is supposed to be returned in registers,
-   and READBUF is non-zero, read the appropriate value from REGCACHE,
-   and copy it into READBUF.  If WRITEBUF is non-zero, write the value
-   from WRITEBUF into REGCACHE.  */
-
-static enum return_value_convention
-m88k_return_value (struct gdbarch *gdbarch, struct value *function,
-		   struct type *type, struct regcache *regcache,
-		   gdb_byte *readbuf, const gdb_byte *writebuf)
-{
-  int len = TYPE_LENGTH (type);
-  gdb_byte buf[8];
-
-  if (!m88k_integral_or_pointer_p (type) && !m88k_floating_p (type))
-    return RETURN_VALUE_STRUCT_CONVENTION;
-
-  if (readbuf)
-    {
-      /* Read the contents of R2 and (if necessary) R3.  */
-      regcache_cooked_read (regcache, M88K_R2_REGNUM, buf);
-      if (len > 4)
-	{
-	  regcache_cooked_read (regcache, M88K_R3_REGNUM, buf + 4);
-	  gdb_assert (len == 8);
-	  memcpy (readbuf, buf, len);
-	}
-      else
-	{
-	  /* Just stripping off any unused bytes should preserve the
-             signed-ness just fine.  */
-	  memcpy (readbuf, buf + 4 - len, len);
-	}
-    }
-
-  if (writebuf)
-    {
-      /* Read the contents to R2 and (if necessary) R3.  */
-      if (len > 4)
-	{
-	  gdb_assert (len == 8);
-	  memcpy (buf, writebuf, 8);
-	  regcache_cooked_write (regcache, M88K_R3_REGNUM, buf + 4);
-	}
-      else
-	{
-	  /* ??? Do we need to do any sign-extension here?  */
-	  memcpy (buf + 4 - len, writebuf, len);
-	}
-      regcache_cooked_write (regcache, M88K_R2_REGNUM, buf);
-    }
-
-  return RETURN_VALUE_REGISTER_CONVENTION;
-}
-
-/* Default frame unwinder.  */
-
-struct m88k_frame_cache
-{
-  /* Base address.  */
-  CORE_ADDR base;
-  CORE_ADDR pc;
-
-  int sp_offset;
-  int fp_offset;
-
-  /* Table of saved registers.  */
-  struct trad_frame_saved_reg *saved_regs;
-};
-
-/* Prologue analysis.  */
-
-/* Macros for extracting fields from instructions.  */
-
-#define BITMASK(pos, width) (((0x1 << (width)) - 1) << (pos))
-#define EXTRACT_FIELD(val, pos, width) ((val) >> (pos) & BITMASK (0, width))
-#define	SUBU_OFFSET(x)	((unsigned)(x & 0xFFFF))
-#define	ST_OFFSET(x)	((unsigned)((x) & 0xFFFF))
-#define	ST_SRC(x)	EXTRACT_FIELD ((x), 21, 5)
-#define	ADDU_OFFSET(x)	((unsigned)(x & 0xFFFF))
-
-/* Possible actions to be taken by the prologue analyzer for the
-   instructions it encounters.  */
-
-enum m88k_prologue_insn_action
-{
-  M88K_PIA_SKIP,		/* Ignore.  */
-  M88K_PIA_NOTE_ST,		/* Note register store.  */
-  M88K_PIA_NOTE_STD,		/* Note register pair store.  */
-  M88K_PIA_NOTE_SP_ADJUSTMENT,	/* Note stack pointer adjustment.  */
-  M88K_PIA_NOTE_FP_ASSIGNMENT,	/* Note frame pointer assignment.  */
-  M88K_PIA_NOTE_BRANCH,		/* Note branch.  */
-  M88K_PIA_NOTE_PROLOGUE_END	/* Note end of prologue.  */
-};
-
-/* Table of instructions that may comprise a function prologue.  */
-
-struct m88k_prologue_insn
-{
-  unsigned long insn;
-  unsigned long mask;
-  enum m88k_prologue_insn_action action;
-};
-
-struct m88k_prologue_insn m88k_prologue_insn_table[] =
-{
-  /* Various register move instructions.  */
-  { 0x58000000, 0xf800ffff, M88K_PIA_SKIP },     /* or/or.u with immed of 0 */
-  { 0xf4005800, 0xfc1fffe0, M88K_PIA_SKIP },     /* or rd,r0,rs */
-  { 0xf4005800, 0xfc00ffff, M88K_PIA_SKIP },     /* or rd,rs,r0 */
-
-  /* Various other instructions.  */
-  { 0x58000000, 0xf8000000, M88K_PIA_SKIP },     /* or/or.u */
-
-  /* Stack pointer setup: "subu sp,sp,n" where n is a multiple of 8.  */
-  { 0x67ff0000, 0xffff0007, M88K_PIA_NOTE_SP_ADJUSTMENT },
-
-  /* Frame pointer assignment: "addu r30,r31,n".  */
-  { 0x63df0000, 0xffff0000, M88K_PIA_NOTE_FP_ASSIGNMENT },
-
-  /* Store to stack instructions; either "st rx,sp,n" or "st.d rx,sp,n".  */
-  { 0x241f0000, 0xfc1f0000, M88K_PIA_NOTE_ST },  /* st rx,sp,n */
-  { 0x201f0000, 0xfc1f0000, M88K_PIA_NOTE_STD }, /* st.d rs,sp,n */
-
-  /* Instructions needed for setting up r25 for pic code.  */
-  { 0x5f200000, 0xffff0000, M88K_PIA_SKIP },     /* or.u r25,r0,offset_high */
-  { 0xcc000002, 0xffffffff, M88K_PIA_SKIP },     /* bsr.n Lab */
-  { 0x5b390000, 0xffff0000, M88K_PIA_SKIP },     /* or r25,r25,offset_low */
-  { 0xf7396001, 0xffffffff, M88K_PIA_SKIP },     /* Lab: addu r25,r25,r1 */
-
-  /* Various branch or jump instructions which have a delay slot --
-     these do not form part of the prologue, but the instruction in
-     the delay slot might be a store instruction which should be
-     noted.  */
-  { 0xc4000000, 0xe4000000, M88K_PIA_NOTE_BRANCH },
-                                      /* br.n, bsr.n, bb0.n, or bb1.n */
-  { 0xec000000, 0xfc000000, M88K_PIA_NOTE_BRANCH }, /* bcnd.n */
-  { 0xf400c400, 0xfffff7e0, M88K_PIA_NOTE_BRANCH }, /* jmp.n or jsr.n */
-
-  /* Catch all.  Ends prologue analysis.  */
-  { 0x00000000, 0x00000000, M88K_PIA_NOTE_PROLOGUE_END }
-};
-
-/* Do a full analysis of the function prologue at PC and update CACHE
-   accordingly.  Bail out early if LIMIT is reached.  Return the
-   address where the analysis stopped.  If LIMIT points beyond the
-   function prologue, the return address should be the end of the
-   prologue.  */
-
-static CORE_ADDR
-m88k_analyze_prologue (struct gdbarch *gdbarch,
-		       CORE_ADDR pc, CORE_ADDR limit,
-		       struct m88k_frame_cache *cache)
-{
-  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  CORE_ADDR end = limit;
-
-  /* Provide a dummy cache if necessary.  */
-  if (cache == NULL)
-    {
-      cache = XALLOCA (struct m88k_frame_cache);
-      cache->saved_regs =
-        XALLOCAVEC (struct trad_frame_saved_reg, M88K_R31_REGNUM + 1);
-
-      /* We only initialize the members we care about.  */
-      cache->saved_regs[M88K_R1_REGNUM].addr = -1;
-      cache->fp_offset = -1;
-    }
-
-  while (pc < limit)
-    {
-      struct m88k_prologue_insn *pi = m88k_prologue_insn_table;
-      unsigned long insn = m88k_fetch_instruction (pc, byte_order);
-
-      while ((insn & pi->mask) != pi->insn)
-	pi++;
-
-      switch (pi->action)
-	{
-	case M88K_PIA_SKIP:
-	  /* If we have a frame pointer, and R1 has been saved,
-             consider this instruction as not being part of the
-             prologue.  */
-	  if (cache->fp_offset != -1
-	      && cache->saved_regs[M88K_R1_REGNUM].addr != -1)
-	    return std::min (pc, end);
-	  break;
-
-	case M88K_PIA_NOTE_ST:
-	case M88K_PIA_NOTE_STD:
-	  /* If no frame has been allocated, the stores aren't part of
-             the prologue.  */
-	  if (cache->sp_offset == 0)
-	    return std::min (pc, end);
-
-	  /* Record location of saved registers.  */
-	  {
-	    int regnum = ST_SRC (insn) + M88K_R0_REGNUM;
-	    ULONGEST offset = ST_OFFSET (insn);
-
-	    cache->saved_regs[regnum].addr = offset;
-	    if (pi->action == M88K_PIA_NOTE_STD && regnum < M88K_R31_REGNUM)
-	      cache->saved_regs[regnum + 1].addr = offset + 4;
-	  }
-	  break;
-
-	case M88K_PIA_NOTE_SP_ADJUSTMENT:
-	  /* A second stack pointer adjustment isn't part of the
-             prologue.  */
-	  if (cache->sp_offset != 0)
-	    return std::min (pc, end);
-
-	  /* Store stack pointer adjustment.  */
-	  cache->sp_offset = -SUBU_OFFSET (insn);
-	  break;
-
-	case M88K_PIA_NOTE_FP_ASSIGNMENT:
-	  /* A second frame pointer assignment isn't part of the
-             prologue.  */
-	  if (cache->fp_offset != -1)
-	    return std::min (pc, end);
-
-	  /* Record frame pointer assignment.  */
-	  cache->fp_offset = ADDU_OFFSET (insn);
-	  break;
-
-	case M88K_PIA_NOTE_BRANCH:
-	  /* The branch instruction isn't part of the prologue, but
-             the instruction in the delay slot might be.  Limit the
-             prologue analysis to the delay slot and record the branch
-             instruction as the end of the prologue.  */
-	  limit = std::min (limit, pc + 2 * M88K_INSN_SIZE);
-	  end = pc;
-	  break;
-
-	case M88K_PIA_NOTE_PROLOGUE_END:
-	  return std::min (pc, end);
-	}
-
-      pc += M88K_INSN_SIZE;
-    }
-
-  return end;
-}
-
-/* An upper limit to the size of the prologue.  */
-const int m88k_max_prologue_size = 128 * M88K_INSN_SIZE;
-
-/* Return the address of first real instruction of the function
-   starting at PC.  */
-
-static CORE_ADDR
-m88k_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
-{
-  struct symtab_and_line sal;
-  CORE_ADDR func_start, func_end;
-
-  /* This is the preferred method, find the end of the prologue by
-     using the debugging information.  */
-  if (find_pc_partial_function (pc, NULL, &func_start, &func_end))
-    {
-      sal = find_pc_line (func_start, 0);
-
-      if (sal.end < func_end && pc <= sal.end)
-	return sal.end;
-    }
-
-  return m88k_analyze_prologue (gdbarch, pc, pc + m88k_max_prologue_size,
-				NULL);
-}
-
-static struct m88k_frame_cache *
-m88k_frame_cache (struct frame_info *this_frame, void **this_cache)
-{
-  struct gdbarch *gdbarch = get_frame_arch (this_frame);
-  struct m88k_frame_cache *cache;
-  CORE_ADDR frame_sp;
-
-  if (*this_cache)
-    return (struct m88k_frame_cache *) *this_cache;
-
-  cache = FRAME_OBSTACK_ZALLOC (struct m88k_frame_cache);
-  cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
-  cache->fp_offset = -1;
-
-  cache->pc = get_frame_func (this_frame);
-  if (cache->pc != 0)
-    m88k_analyze_prologue (gdbarch, cache->pc, get_frame_pc (this_frame),
-			   cache);
-
-  /* Calculate the stack pointer used in the prologue.  */
-  if (cache->fp_offset != -1)
-    {
-      CORE_ADDR fp;
-
-      fp = get_frame_register_unsigned (this_frame, M88K_R30_REGNUM);
-      frame_sp = fp - cache->fp_offset;
-    }
-  else
-    {
-      /* If we know where the return address is saved, we can take a
-         solid guess at what the frame pointer should be.  */
-      if (cache->saved_regs[M88K_R1_REGNUM].addr != -1)
-	cache->fp_offset = cache->saved_regs[M88K_R1_REGNUM].addr - 4;
-      frame_sp = get_frame_register_unsigned (this_frame, M88K_R31_REGNUM);
-    }
-
-  /* Now that we know the stack pointer, adjust the location of the
-     saved registers.  */
-  {
-    int regnum;
-
-    for (regnum = M88K_R0_REGNUM; regnum < M88K_R31_REGNUM; regnum ++)
-      if (cache->saved_regs[regnum].addr != -1)
-	cache->saved_regs[regnum].addr += frame_sp;
-  }
-
-  /* Calculate the frame's base.  */
-  cache->base = frame_sp - cache->sp_offset;
-  trad_frame_set_value (cache->saved_regs, M88K_R31_REGNUM, cache->base);
-
-  /* Identify SXIP with the return address in R1.  */
-  cache->saved_regs[M88K_SXIP_REGNUM] = cache->saved_regs[M88K_R1_REGNUM];
-
-  *this_cache = cache;
-  return cache;
-}
-
-static void
-m88k_frame_this_id (struct frame_info *this_frame, void **this_cache,
-		    struct frame_id *this_id)
-{
-  struct m88k_frame_cache *cache = m88k_frame_cache (this_frame, this_cache);
-
-  /* This marks the outermost frame.  */
-  if (cache->base == 0)
-    return;
-
-  (*this_id) = frame_id_build (cache->base, cache->pc);
-}
-
-static struct value *
-m88k_frame_prev_register (struct frame_info *this_frame,
-			  void **this_cache, int regnum)
-{
-  struct m88k_frame_cache *cache = m88k_frame_cache (this_frame, this_cache);
-
-  if (regnum == M88K_SNIP_REGNUM || regnum == M88K_SFIP_REGNUM)
-    {
-      struct value *value;
-      CORE_ADDR pc;
-
-      value = trad_frame_get_prev_register (this_frame, cache->saved_regs,
-					    M88K_SXIP_REGNUM);
-      pc = value_as_long (value);
-      release_value (value);
-
-      if (regnum == M88K_SFIP_REGNUM)
-	pc += 4;
-
-      return frame_unwind_got_constant (this_frame, regnum, pc + 4);
-    }
-
-  return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
-}
-
-static const struct frame_unwind m88k_frame_unwind =
-{
-  NORMAL_FRAME,
-  default_frame_unwind_stop_reason,
-  m88k_frame_this_id,
-  m88k_frame_prev_register,
-  NULL,
-  default_frame_sniffer
-};
-
-
-static CORE_ADDR
-m88k_frame_base_address (struct frame_info *this_frame, void **this_cache)
-{
-  struct m88k_frame_cache *cache = m88k_frame_cache (this_frame, this_cache);
-
-  if (cache->fp_offset != -1)
-    return cache->base + cache->sp_offset + cache->fp_offset;
-
-  return 0;
-}
-
-static const struct frame_base m88k_frame_base =
-{
-  &m88k_frame_unwind,
-  m88k_frame_base_address,
-  m88k_frame_base_address,
-  m88k_frame_base_address
-};
-
-
-/* Core file support.  */
-
-/* Supply register REGNUM from the buffer specified by GREGS and LEN
-   in the general-purpose register set REGSET to register cache
-   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
-
-static void
-m88k_supply_gregset (const struct regset *regset,
-		     struct regcache *regcache,
-		     int regnum, const void *gregs, size_t len)
-{
-  const gdb_byte *regs = (const gdb_byte *) gregs;
-  int i;
-
-  for (i = 0; i < M88K_NUM_REGS; i++)
-    {
-      if (regnum == i || regnum == -1)
-	regcache_raw_supply (regcache, i, regs + i * 4);
-    }
-}
-
-/* Motorola 88000 register set.  */
-
-static const struct regset m88k_gregset =
-{
-  NULL,
-  m88k_supply_gregset
-};
-
-/* Iterate over supported core file register note sections. */
-
-static void
-m88k_iterate_over_regset_sections (struct gdbarch *gdbarch,
-				   iterate_over_regset_sections_cb *cb,
-				   void *cb_data,
-				   const struct regcache *regcache)
-{
-  cb (".reg", M88K_NUM_REGS * 4, &m88k_gregset, NULL, cb_data);
-}
-
-
-static struct gdbarch *
-m88k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
-{
-  struct gdbarch *gdbarch;
-
-  /* If there is already a candidate, use it.  */
-  arches = gdbarch_list_lookup_by_info (arches, &info);
-  if (arches != NULL)
-    return arches->gdbarch;
-
-  /* Allocate space for the new architecture.  */
-  gdbarch = gdbarch_alloc (&info, NULL);
-
-  /* There is no real `long double'.  */
-  set_gdbarch_long_double_bit (gdbarch, 64);
-  set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
-
-  set_gdbarch_num_regs (gdbarch, M88K_NUM_REGS);
-  set_gdbarch_register_name (gdbarch, m88k_register_name);
-  set_gdbarch_register_type (gdbarch, m88k_register_type);
-
-  /* Register numbers of various important registers.  */
-  set_gdbarch_sp_regnum (gdbarch, M88K_R31_REGNUM);
-  set_gdbarch_pc_regnum (gdbarch, M88K_SXIP_REGNUM);
-
-  /* Core file support.  */
-  set_gdbarch_iterate_over_regset_sections
-    (gdbarch, m88k_iterate_over_regset_sections);
-
-  set_gdbarch_skip_prologue (gdbarch, m88k_skip_prologue);
-
-  /* Stack grows downward.  */
-  set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
-
-  /* Call dummy code.  */
-  set_gdbarch_push_dummy_call (gdbarch, m88k_push_dummy_call);
-  set_gdbarch_dummy_id (gdbarch, m88k_dummy_id);
-
-  /* Return value info.  */
-  set_gdbarch_return_value (gdbarch, m88k_return_value);
-
-  set_gdbarch_addr_bits_remove (gdbarch, m88k_addr_bits_remove);
-  set_gdbarch_breakpoint_kind_from_pc (gdbarch, m88k_breakpoint::kind_from_pc);
-  set_gdbarch_sw_breakpoint_from_kind (gdbarch, m88k_breakpoint::bp_from_kind);
-  set_gdbarch_unwind_pc (gdbarch, m88k_unwind_pc);
-  set_gdbarch_write_pc (gdbarch, m88k_write_pc);
-
-  frame_base_set_default (gdbarch, &m88k_frame_base);
-  frame_unwind_append_unwinder (gdbarch, &m88k_frame_unwind);
-
-  return gdbarch;
-}
-
-void
-_initialize_m88k_tdep (void)
-{
-  gdbarch_register (bfd_arch_m88k, m88k_gdbarch_init, NULL);
-}
diff --git a/gdb/m88k-tdep.h b/gdb/m88k-tdep.h
deleted file mode 100644
index ef96e20..0000000
--- a/gdb/m88k-tdep.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Target-dependent code for the Motorola 88000 series.
-
-   Copyright (C) 2004-2018 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 M88K_TDEP_H
-#define M88K_TDEP_H
-
-/* Register numbers of various important registers.  */
-
-enum m88k_regnum
-{
-  M88K_R0_REGNUM,
-  M88K_R1_REGNUM,		/* Return address (hardware).  */
-  M88K_R2_REGNUM,
-  M88K_R3_REGNUM,
-  M88K_R12_REGNUM = 12,
-  M88K_R30_REGNUM = 30,		/* Frame pointer.  */
-  M88K_R31_REGNUM,		/* Stack pointer.  */
-  M88K_EPSR_REGNUM,
-  M88K_FPSR_REGNUM,
-  M88K_FPCR_REGNUM,
-  M88K_SXIP_REGNUM,
-  M88K_SNIP_REGNUM,
-  M88K_SFIP_REGNUM,
-  M88K_NUM_REGS			/* Number of machine registers.  */
-
-};
-
-/* Instruction size.  */
-#define M88K_INSN_SIZE 4
-
-#endif /* m88k-tdep.h */